File: | llvm/lib/Target/X86/X86ISelLowering.cpp |
Warning: | line 16337, column 21 The result of the '/' expression is undefined |
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1 | //===-- X86ISelLowering.cpp - X86 DAG Lowering Implementation -------------===// | |||
2 | // | |||
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | |||
4 | // See https://llvm.org/LICENSE.txt for license information. | |||
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | |||
6 | // | |||
7 | //===----------------------------------------------------------------------===// | |||
8 | // | |||
9 | // This file defines the interfaces that X86 uses to lower LLVM code into a | |||
10 | // selection DAG. | |||
11 | // | |||
12 | //===----------------------------------------------------------------------===// | |||
13 | ||||
14 | #include "X86ISelLowering.h" | |||
15 | #include "MCTargetDesc/X86ShuffleDecode.h" | |||
16 | #include "X86.h" | |||
17 | #include "X86CallingConv.h" | |||
18 | #include "X86FrameLowering.h" | |||
19 | #include "X86InstrBuilder.h" | |||
20 | #include "X86IntrinsicsInfo.h" | |||
21 | #include "X86MachineFunctionInfo.h" | |||
22 | #include "X86TargetMachine.h" | |||
23 | #include "X86TargetObjectFile.h" | |||
24 | #include "llvm/ADT/SmallBitVector.h" | |||
25 | #include "llvm/ADT/SmallSet.h" | |||
26 | #include "llvm/ADT/Statistic.h" | |||
27 | #include "llvm/ADT/StringExtras.h" | |||
28 | #include "llvm/ADT/StringSwitch.h" | |||
29 | #include "llvm/Analysis/BlockFrequencyInfo.h" | |||
30 | #include "llvm/Analysis/EHPersonalities.h" | |||
31 | #include "llvm/Analysis/ObjCARCUtil.h" | |||
32 | #include "llvm/Analysis/ProfileSummaryInfo.h" | |||
33 | #include "llvm/Analysis/VectorUtils.h" | |||
34 | #include "llvm/CodeGen/IntrinsicLowering.h" | |||
35 | #include "llvm/CodeGen/MachineFrameInfo.h" | |||
36 | #include "llvm/CodeGen/MachineFunction.h" | |||
37 | #include "llvm/CodeGen/MachineInstrBuilder.h" | |||
38 | #include "llvm/CodeGen/MachineJumpTableInfo.h" | |||
39 | #include "llvm/CodeGen/MachineLoopInfo.h" | |||
40 | #include "llvm/CodeGen/MachineModuleInfo.h" | |||
41 | #include "llvm/CodeGen/MachineRegisterInfo.h" | |||
42 | #include "llvm/CodeGen/TargetLowering.h" | |||
43 | #include "llvm/CodeGen/WinEHFuncInfo.h" | |||
44 | #include "llvm/IR/CallingConv.h" | |||
45 | #include "llvm/IR/Constants.h" | |||
46 | #include "llvm/IR/DerivedTypes.h" | |||
47 | #include "llvm/IR/DiagnosticInfo.h" | |||
48 | #include "llvm/IR/Function.h" | |||
49 | #include "llvm/IR/GlobalAlias.h" | |||
50 | #include "llvm/IR/GlobalVariable.h" | |||
51 | #include "llvm/IR/IRBuilder.h" | |||
52 | #include "llvm/IR/Instructions.h" | |||
53 | #include "llvm/IR/Intrinsics.h" | |||
54 | #include "llvm/IR/PatternMatch.h" | |||
55 | #include "llvm/MC/MCAsmInfo.h" | |||
56 | #include "llvm/MC/MCContext.h" | |||
57 | #include "llvm/MC/MCExpr.h" | |||
58 | #include "llvm/MC/MCSymbol.h" | |||
59 | #include "llvm/Support/CommandLine.h" | |||
60 | #include "llvm/Support/Debug.h" | |||
61 | #include "llvm/Support/ErrorHandling.h" | |||
62 | #include "llvm/Support/KnownBits.h" | |||
63 | #include "llvm/Support/MathExtras.h" | |||
64 | #include "llvm/Target/TargetOptions.h" | |||
65 | #include <algorithm> | |||
66 | #include <bitset> | |||
67 | #include <cctype> | |||
68 | #include <numeric> | |||
69 | using namespace llvm; | |||
70 | ||||
71 | #define DEBUG_TYPE"x86-isel" "x86-isel" | |||
72 | ||||
73 | STATISTIC(NumTailCalls, "Number of tail calls")static llvm::Statistic NumTailCalls = {"x86-isel", "NumTailCalls" , "Number of tail calls"}; | |||
74 | ||||
75 | static cl::opt<int> ExperimentalPrefInnermostLoopAlignment( | |||
76 | "x86-experimental-pref-innermost-loop-alignment", cl::init(4), | |||
77 | cl::desc( | |||
78 | "Sets the preferable loop alignment for experiments (as log2 bytes) " | |||
79 | "for innermost loops only. If specified, this option overrides " | |||
80 | "alignment set by x86-experimental-pref-loop-alignment."), | |||
81 | cl::Hidden); | |||
82 | ||||
83 | static cl::opt<bool> MulConstantOptimization( | |||
84 | "mul-constant-optimization", cl::init(true), | |||
85 | cl::desc("Replace 'mul x, Const' with more effective instructions like " | |||
86 | "SHIFT, LEA, etc."), | |||
87 | cl::Hidden); | |||
88 | ||||
89 | static cl::opt<bool> ExperimentalUnorderedISEL( | |||
90 | "x86-experimental-unordered-atomic-isel", cl::init(false), | |||
91 | cl::desc("Use LoadSDNode and StoreSDNode instead of " | |||
92 | "AtomicSDNode for unordered atomic loads and " | |||
93 | "stores respectively."), | |||
94 | cl::Hidden); | |||
95 | ||||
96 | /// Call this when the user attempts to do something unsupported, like | |||
97 | /// returning a double without SSE2 enabled on x86_64. This is not fatal, unlike | |||
98 | /// report_fatal_error, so calling code should attempt to recover without | |||
99 | /// crashing. | |||
100 | static void errorUnsupported(SelectionDAG &DAG, const SDLoc &dl, | |||
101 | const char *Msg) { | |||
102 | MachineFunction &MF = DAG.getMachineFunction(); | |||
103 | DAG.getContext()->diagnose( | |||
104 | DiagnosticInfoUnsupported(MF.getFunction(), Msg, dl.getDebugLoc())); | |||
105 | } | |||
106 | ||||
107 | X86TargetLowering::X86TargetLowering(const X86TargetMachine &TM, | |||
108 | const X86Subtarget &STI) | |||
109 | : TargetLowering(TM), Subtarget(STI) { | |||
110 | bool UseX87 = !Subtarget.useSoftFloat() && Subtarget.hasX87(); | |||
111 | X86ScalarSSEf64 = Subtarget.hasSSE2(); | |||
112 | X86ScalarSSEf32 = Subtarget.hasSSE1(); | |||
113 | X86ScalarSSEf16 = Subtarget.hasFP16(); | |||
114 | MVT PtrVT = MVT::getIntegerVT(TM.getPointerSizeInBits(0)); | |||
115 | ||||
116 | // Set up the TargetLowering object. | |||
117 | ||||
118 | // X86 is weird. It always uses i8 for shift amounts and setcc results. | |||
119 | setBooleanContents(ZeroOrOneBooleanContent); | |||
120 | // X86-SSE is even stranger. It uses -1 or 0 for vector masks. | |||
121 | setBooleanVectorContents(ZeroOrNegativeOneBooleanContent); | |||
122 | ||||
123 | // For 64-bit, since we have so many registers, use the ILP scheduler. | |||
124 | // For 32-bit, use the register pressure specific scheduling. | |||
125 | // For Atom, always use ILP scheduling. | |||
126 | if (Subtarget.isAtom()) | |||
127 | setSchedulingPreference(Sched::ILP); | |||
128 | else if (Subtarget.is64Bit()) | |||
129 | setSchedulingPreference(Sched::ILP); | |||
130 | else | |||
131 | setSchedulingPreference(Sched::RegPressure); | |||
132 | const X86RegisterInfo *RegInfo = Subtarget.getRegisterInfo(); | |||
133 | setStackPointerRegisterToSaveRestore(RegInfo->getStackRegister()); | |||
134 | ||||
135 | // Bypass expensive divides and use cheaper ones. | |||
136 | if (TM.getOptLevel() >= CodeGenOpt::Default) { | |||
137 | if (Subtarget.hasSlowDivide32()) | |||
138 | addBypassSlowDiv(32, 8); | |||
139 | if (Subtarget.hasSlowDivide64() && Subtarget.is64Bit()) | |||
140 | addBypassSlowDiv(64, 32); | |||
141 | } | |||
142 | ||||
143 | // Setup Windows compiler runtime calls. | |||
144 | if (Subtarget.isTargetWindowsMSVC() || Subtarget.isTargetWindowsItanium()) { | |||
145 | static const struct { | |||
146 | const RTLIB::Libcall Op; | |||
147 | const char * const Name; | |||
148 | const CallingConv::ID CC; | |||
149 | } LibraryCalls[] = { | |||
150 | { RTLIB::SDIV_I64, "_alldiv", CallingConv::X86_StdCall }, | |||
151 | { RTLIB::UDIV_I64, "_aulldiv", CallingConv::X86_StdCall }, | |||
152 | { RTLIB::SREM_I64, "_allrem", CallingConv::X86_StdCall }, | |||
153 | { RTLIB::UREM_I64, "_aullrem", CallingConv::X86_StdCall }, | |||
154 | { RTLIB::MUL_I64, "_allmul", CallingConv::X86_StdCall }, | |||
155 | }; | |||
156 | ||||
157 | for (const auto &LC : LibraryCalls) { | |||
158 | setLibcallName(LC.Op, LC.Name); | |||
159 | setLibcallCallingConv(LC.Op, LC.CC); | |||
160 | } | |||
161 | } | |||
162 | ||||
163 | if (Subtarget.getTargetTriple().isOSMSVCRT()) { | |||
164 | // MSVCRT doesn't have powi; fall back to pow | |||
165 | setLibcallName(RTLIB::POWI_F32, nullptr); | |||
166 | setLibcallName(RTLIB::POWI_F64, nullptr); | |||
167 | } | |||
168 | ||||
169 | // If we don't have cmpxchg8b(meaing this is a 386/486), limit atomic size to | |||
170 | // 32 bits so the AtomicExpandPass will expand it so we don't need cmpxchg8b. | |||
171 | // FIXME: Should we be limiting the atomic size on other configs? Default is | |||
172 | // 1024. | |||
173 | if (!Subtarget.hasCmpxchg8b()) | |||
174 | setMaxAtomicSizeInBitsSupported(32); | |||
175 | ||||
176 | // Set up the register classes. | |||
177 | addRegisterClass(MVT::i8, &X86::GR8RegClass); | |||
178 | addRegisterClass(MVT::i16, &X86::GR16RegClass); | |||
179 | addRegisterClass(MVT::i32, &X86::GR32RegClass); | |||
180 | if (Subtarget.is64Bit()) | |||
181 | addRegisterClass(MVT::i64, &X86::GR64RegClass); | |||
182 | ||||
183 | for (MVT VT : MVT::integer_valuetypes()) | |||
184 | setLoadExtAction(ISD::SEXTLOAD, VT, MVT::i1, Promote); | |||
185 | ||||
186 | // We don't accept any truncstore of integer registers. | |||
187 | setTruncStoreAction(MVT::i64, MVT::i32, Expand); | |||
188 | setTruncStoreAction(MVT::i64, MVT::i16, Expand); | |||
189 | setTruncStoreAction(MVT::i64, MVT::i8 , Expand); | |||
190 | setTruncStoreAction(MVT::i32, MVT::i16, Expand); | |||
191 | setTruncStoreAction(MVT::i32, MVT::i8 , Expand); | |||
192 | setTruncStoreAction(MVT::i16, MVT::i8, Expand); | |||
193 | ||||
194 | setTruncStoreAction(MVT::f64, MVT::f32, Expand); | |||
195 | ||||
196 | // SETOEQ and SETUNE require checking two conditions. | |||
197 | for (auto VT : {MVT::f32, MVT::f64, MVT::f80}) { | |||
198 | setCondCodeAction(ISD::SETOEQ, VT, Expand); | |||
199 | setCondCodeAction(ISD::SETUNE, VT, Expand); | |||
200 | } | |||
201 | ||||
202 | // Integer absolute. | |||
203 | if (Subtarget.hasCMov()) { | |||
204 | setOperationAction(ISD::ABS , MVT::i16 , Custom); | |||
205 | setOperationAction(ISD::ABS , MVT::i32 , Custom); | |||
206 | if (Subtarget.is64Bit()) | |||
207 | setOperationAction(ISD::ABS , MVT::i64 , Custom); | |||
208 | } | |||
209 | ||||
210 | // Signed saturation subtraction. | |||
211 | setOperationAction(ISD::SSUBSAT , MVT::i8 , Custom); | |||
212 | setOperationAction(ISD::SSUBSAT , MVT::i16 , Custom); | |||
213 | setOperationAction(ISD::SSUBSAT , MVT::i32 , Custom); | |||
214 | if (Subtarget.is64Bit()) | |||
215 | setOperationAction(ISD::SSUBSAT , MVT::i64 , Custom); | |||
216 | ||||
217 | // Funnel shifts. | |||
218 | for (auto ShiftOp : {ISD::FSHL, ISD::FSHR}) { | |||
219 | // For slow shld targets we only lower for code size. | |||
220 | LegalizeAction ShiftDoubleAction = Subtarget.isSHLDSlow() ? Custom : Legal; | |||
221 | ||||
222 | setOperationAction(ShiftOp , MVT::i8 , Custom); | |||
223 | setOperationAction(ShiftOp , MVT::i16 , Custom); | |||
224 | setOperationAction(ShiftOp , MVT::i32 , ShiftDoubleAction); | |||
225 | if (Subtarget.is64Bit()) | |||
226 | setOperationAction(ShiftOp , MVT::i64 , ShiftDoubleAction); | |||
227 | } | |||
228 | ||||
229 | if (!Subtarget.useSoftFloat()) { | |||
230 | // Promote all UINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have this | |||
231 | // operation. | |||
232 | setOperationAction(ISD::UINT_TO_FP, MVT::i8, Promote); | |||
233 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::i8, Promote); | |||
234 | setOperationAction(ISD::UINT_TO_FP, MVT::i16, Promote); | |||
235 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::i16, Promote); | |||
236 | // We have an algorithm for SSE2, and we turn this into a 64-bit | |||
237 | // FILD or VCVTUSI2SS/SD for other targets. | |||
238 | setOperationAction(ISD::UINT_TO_FP, MVT::i32, Custom); | |||
239 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::i32, Custom); | |||
240 | // We have an algorithm for SSE2->double, and we turn this into a | |||
241 | // 64-bit FILD followed by conditional FADD for other targets. | |||
242 | setOperationAction(ISD::UINT_TO_FP, MVT::i64, Custom); | |||
243 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::i64, Custom); | |||
244 | ||||
245 | // Promote i8 SINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have | |||
246 | // this operation. | |||
247 | setOperationAction(ISD::SINT_TO_FP, MVT::i8, Promote); | |||
248 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::i8, Promote); | |||
249 | // SSE has no i16 to fp conversion, only i32. We promote in the handler | |||
250 | // to allow f80 to use i16 and f64 to use i16 with sse1 only | |||
251 | setOperationAction(ISD::SINT_TO_FP, MVT::i16, Custom); | |||
252 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::i16, Custom); | |||
253 | // f32 and f64 cases are Legal with SSE1/SSE2, f80 case is not | |||
254 | setOperationAction(ISD::SINT_TO_FP, MVT::i32, Custom); | |||
255 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::i32, Custom); | |||
256 | // In 32-bit mode these are custom lowered. In 64-bit mode F32 and F64 | |||
257 | // are Legal, f80 is custom lowered. | |||
258 | setOperationAction(ISD::SINT_TO_FP, MVT::i64, Custom); | |||
259 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::i64, Custom); | |||
260 | ||||
261 | // Promote i8 FP_TO_SINT to larger FP_TO_SINTS's, as X86 doesn't have | |||
262 | // this operation. | |||
263 | setOperationAction(ISD::FP_TO_SINT, MVT::i8, Promote); | |||
264 | // FIXME: This doesn't generate invalid exception when it should. PR44019. | |||
265 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::i8, Promote); | |||
266 | setOperationAction(ISD::FP_TO_SINT, MVT::i16, Custom); | |||
267 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::i16, Custom); | |||
268 | setOperationAction(ISD::FP_TO_SINT, MVT::i32, Custom); | |||
269 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::i32, Custom); | |||
270 | // In 32-bit mode these are custom lowered. In 64-bit mode F32 and F64 | |||
271 | // are Legal, f80 is custom lowered. | |||
272 | setOperationAction(ISD::FP_TO_SINT, MVT::i64, Custom); | |||
273 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::i64, Custom); | |||
274 | ||||
275 | // Handle FP_TO_UINT by promoting the destination to a larger signed | |||
276 | // conversion. | |||
277 | setOperationAction(ISD::FP_TO_UINT, MVT::i8, Promote); | |||
278 | // FIXME: This doesn't generate invalid exception when it should. PR44019. | |||
279 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::i8, Promote); | |||
280 | setOperationAction(ISD::FP_TO_UINT, MVT::i16, Promote); | |||
281 | // FIXME: This doesn't generate invalid exception when it should. PR44019. | |||
282 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::i16, Promote); | |||
283 | setOperationAction(ISD::FP_TO_UINT, MVT::i32, Custom); | |||
284 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::i32, Custom); | |||
285 | setOperationAction(ISD::FP_TO_UINT, MVT::i64, Custom); | |||
286 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::i64, Custom); | |||
287 | ||||
288 | setOperationAction(ISD::LRINT, MVT::f32, Custom); | |||
289 | setOperationAction(ISD::LRINT, MVT::f64, Custom); | |||
290 | setOperationAction(ISD::LLRINT, MVT::f32, Custom); | |||
291 | setOperationAction(ISD::LLRINT, MVT::f64, Custom); | |||
292 | ||||
293 | if (!Subtarget.is64Bit()) { | |||
294 | setOperationAction(ISD::LRINT, MVT::i64, Custom); | |||
295 | setOperationAction(ISD::LLRINT, MVT::i64, Custom); | |||
296 | } | |||
297 | } | |||
298 | ||||
299 | if (Subtarget.hasSSE2()) { | |||
300 | // Custom lowering for saturating float to int conversions. | |||
301 | // We handle promotion to larger result types manually. | |||
302 | for (MVT VT : { MVT::i8, MVT::i16, MVT::i32 }) { | |||
303 | setOperationAction(ISD::FP_TO_UINT_SAT, VT, Custom); | |||
304 | setOperationAction(ISD::FP_TO_SINT_SAT, VT, Custom); | |||
305 | } | |||
306 | if (Subtarget.is64Bit()) { | |||
307 | setOperationAction(ISD::FP_TO_UINT_SAT, MVT::i64, Custom); | |||
308 | setOperationAction(ISD::FP_TO_SINT_SAT, MVT::i64, Custom); | |||
309 | } | |||
310 | } | |||
311 | ||||
312 | // Handle address space casts between mixed sized pointers. | |||
313 | setOperationAction(ISD::ADDRSPACECAST, MVT::i32, Custom); | |||
314 | setOperationAction(ISD::ADDRSPACECAST, MVT::i64, Custom); | |||
315 | ||||
316 | // TODO: when we have SSE, these could be more efficient, by using movd/movq. | |||
317 | if (!X86ScalarSSEf64) { | |||
318 | setOperationAction(ISD::BITCAST , MVT::f32 , Expand); | |||
319 | setOperationAction(ISD::BITCAST , MVT::i32 , Expand); | |||
320 | if (Subtarget.is64Bit()) { | |||
321 | setOperationAction(ISD::BITCAST , MVT::f64 , Expand); | |||
322 | // Without SSE, i64->f64 goes through memory. | |||
323 | setOperationAction(ISD::BITCAST , MVT::i64 , Expand); | |||
324 | } | |||
325 | } else if (!Subtarget.is64Bit()) | |||
326 | setOperationAction(ISD::BITCAST , MVT::i64 , Custom); | |||
327 | ||||
328 | // Scalar integer divide and remainder are lowered to use operations that | |||
329 | // produce two results, to match the available instructions. This exposes | |||
330 | // the two-result form to trivial CSE, which is able to combine x/y and x%y | |||
331 | // into a single instruction. | |||
332 | // | |||
333 | // Scalar integer multiply-high is also lowered to use two-result | |||
334 | // operations, to match the available instructions. However, plain multiply | |||
335 | // (low) operations are left as Legal, as there are single-result | |||
336 | // instructions for this in x86. Using the two-result multiply instructions | |||
337 | // when both high and low results are needed must be arranged by dagcombine. | |||
338 | for (auto VT : { MVT::i8, MVT::i16, MVT::i32, MVT::i64 }) { | |||
339 | setOperationAction(ISD::MULHS, VT, Expand); | |||
340 | setOperationAction(ISD::MULHU, VT, Expand); | |||
341 | setOperationAction(ISD::SDIV, VT, Expand); | |||
342 | setOperationAction(ISD::UDIV, VT, Expand); | |||
343 | setOperationAction(ISD::SREM, VT, Expand); | |||
344 | setOperationAction(ISD::UREM, VT, Expand); | |||
345 | } | |||
346 | ||||
347 | setOperationAction(ISD::BR_JT , MVT::Other, Expand); | |||
348 | setOperationAction(ISD::BRCOND , MVT::Other, Custom); | |||
349 | for (auto VT : { MVT::f32, MVT::f64, MVT::f80, MVT::f128, | |||
350 | MVT::i8, MVT::i16, MVT::i32, MVT::i64 }) { | |||
351 | setOperationAction(ISD::BR_CC, VT, Expand); | |||
352 | setOperationAction(ISD::SELECT_CC, VT, Expand); | |||
353 | } | |||
354 | if (Subtarget.is64Bit()) | |||
355 | setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i32, Legal); | |||
356 | setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16 , Legal); | |||
357 | setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8 , Legal); | |||
358 | setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1 , Expand); | |||
359 | ||||
360 | setOperationAction(ISD::FREM , MVT::f32 , Expand); | |||
361 | setOperationAction(ISD::FREM , MVT::f64 , Expand); | |||
362 | setOperationAction(ISD::FREM , MVT::f80 , Expand); | |||
363 | setOperationAction(ISD::FREM , MVT::f128 , Expand); | |||
364 | ||||
365 | if (!Subtarget.useSoftFloat() && Subtarget.hasX87()) { | |||
366 | setOperationAction(ISD::FLT_ROUNDS_ , MVT::i32 , Custom); | |||
367 | setOperationAction(ISD::SET_ROUNDING , MVT::Other, Custom); | |||
368 | } | |||
369 | ||||
370 | // Promote the i8 variants and force them on up to i32 which has a shorter | |||
371 | // encoding. | |||
372 | setOperationPromotedToType(ISD::CTTZ , MVT::i8 , MVT::i32); | |||
373 | setOperationPromotedToType(ISD::CTTZ_ZERO_UNDEF, MVT::i8 , MVT::i32); | |||
374 | ||||
375 | if (Subtarget.hasBMI()) { | |||
376 | // Promote the i16 zero undef variant and force it on up to i32 when tzcnt | |||
377 | // is enabled. | |||
378 | setOperationPromotedToType(ISD::CTTZ_ZERO_UNDEF, MVT::i16, MVT::i32); | |||
379 | } else { | |||
380 | setOperationAction(ISD::CTTZ, MVT::i16, Custom); | |||
381 | setOperationAction(ISD::CTTZ , MVT::i32 , Custom); | |||
382 | setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i16 , Legal); | |||
383 | setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i32 , Legal); | |||
384 | if (Subtarget.is64Bit()) { | |||
385 | setOperationAction(ISD::CTTZ , MVT::i64 , Custom); | |||
386 | setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i64, Legal); | |||
387 | } | |||
388 | } | |||
389 | ||||
390 | if (Subtarget.hasLZCNT()) { | |||
391 | // When promoting the i8 variants, force them to i32 for a shorter | |||
392 | // encoding. | |||
393 | setOperationPromotedToType(ISD::CTLZ , MVT::i8 , MVT::i32); | |||
394 | setOperationPromotedToType(ISD::CTLZ_ZERO_UNDEF, MVT::i8 , MVT::i32); | |||
395 | } else { | |||
396 | for (auto VT : {MVT::i8, MVT::i16, MVT::i32, MVT::i64}) { | |||
397 | if (VT == MVT::i64 && !Subtarget.is64Bit()) | |||
398 | continue; | |||
399 | setOperationAction(ISD::CTLZ , VT, Custom); | |||
400 | setOperationAction(ISD::CTLZ_ZERO_UNDEF, VT, Custom); | |||
401 | } | |||
402 | } | |||
403 | ||||
404 | for (auto Op : {ISD::FP16_TO_FP, ISD::STRICT_FP16_TO_FP, ISD::FP_TO_FP16, | |||
405 | ISD::STRICT_FP_TO_FP16}) { | |||
406 | // Special handling for half-precision floating point conversions. | |||
407 | // If we don't have F16C support, then lower half float conversions | |||
408 | // into library calls. | |||
409 | setOperationAction( | |||
410 | Op, MVT::f32, | |||
411 | (!Subtarget.useSoftFloat() && Subtarget.hasF16C()) ? Custom : Expand); | |||
412 | // There's never any support for operations beyond MVT::f32. | |||
413 | setOperationAction(Op, MVT::f64, Expand); | |||
414 | setOperationAction(Op, MVT::f80, Expand); | |||
415 | setOperationAction(Op, MVT::f128, Expand); | |||
416 | } | |||
417 | ||||
418 | setLoadExtAction(ISD::EXTLOAD, MVT::f32, MVT::f16, Expand); | |||
419 | setLoadExtAction(ISD::EXTLOAD, MVT::f64, MVT::f16, Expand); | |||
420 | setLoadExtAction(ISD::EXTLOAD, MVT::f80, MVT::f16, Expand); | |||
421 | setLoadExtAction(ISD::EXTLOAD, MVT::f128, MVT::f16, Expand); | |||
422 | setTruncStoreAction(MVT::f32, MVT::f16, Expand); | |||
423 | setTruncStoreAction(MVT::f64, MVT::f16, Expand); | |||
424 | setTruncStoreAction(MVT::f80, MVT::f16, Expand); | |||
425 | setTruncStoreAction(MVT::f128, MVT::f16, Expand); | |||
426 | ||||
427 | setOperationAction(ISD::PARITY, MVT::i8, Custom); | |||
428 | if (Subtarget.hasPOPCNT()) { | |||
429 | setOperationPromotedToType(ISD::CTPOP, MVT::i8, MVT::i32); | |||
430 | } else { | |||
431 | setOperationAction(ISD::CTPOP , MVT::i8 , Expand); | |||
432 | setOperationAction(ISD::CTPOP , MVT::i16 , Expand); | |||
433 | setOperationAction(ISD::CTPOP , MVT::i32 , Expand); | |||
434 | if (Subtarget.is64Bit()) | |||
435 | setOperationAction(ISD::CTPOP , MVT::i64 , Expand); | |||
436 | else | |||
437 | setOperationAction(ISD::CTPOP , MVT::i64 , Custom); | |||
438 | ||||
439 | setOperationAction(ISD::PARITY, MVT::i16, Custom); | |||
440 | setOperationAction(ISD::PARITY, MVT::i32, Custom); | |||
441 | if (Subtarget.is64Bit()) | |||
442 | setOperationAction(ISD::PARITY, MVT::i64, Custom); | |||
443 | } | |||
444 | ||||
445 | setOperationAction(ISD::READCYCLECOUNTER , MVT::i64 , Custom); | |||
446 | ||||
447 | if (!Subtarget.hasMOVBE()) | |||
448 | setOperationAction(ISD::BSWAP , MVT::i16 , Expand); | |||
449 | ||||
450 | // X86 wants to expand cmov itself. | |||
451 | for (auto VT : { MVT::f32, MVT::f64, MVT::f80, MVT::f128 }) { | |||
452 | setOperationAction(ISD::SELECT, VT, Custom); | |||
453 | setOperationAction(ISD::SETCC, VT, Custom); | |||
454 | setOperationAction(ISD::STRICT_FSETCC, VT, Custom); | |||
455 | setOperationAction(ISD::STRICT_FSETCCS, VT, Custom); | |||
456 | } | |||
457 | for (auto VT : { MVT::i8, MVT::i16, MVT::i32, MVT::i64 }) { | |||
458 | if (VT == MVT::i64 && !Subtarget.is64Bit()) | |||
459 | continue; | |||
460 | setOperationAction(ISD::SELECT, VT, Custom); | |||
461 | setOperationAction(ISD::SETCC, VT, Custom); | |||
462 | } | |||
463 | ||||
464 | // Custom action for SELECT MMX and expand action for SELECT_CC MMX | |||
465 | setOperationAction(ISD::SELECT, MVT::x86mmx, Custom); | |||
466 | setOperationAction(ISD::SELECT_CC, MVT::x86mmx, Expand); | |||
467 | ||||
468 | setOperationAction(ISD::EH_RETURN , MVT::Other, Custom); | |||
469 | // NOTE: EH_SJLJ_SETJMP/_LONGJMP are not recommended, since | |||
470 | // LLVM/Clang supports zero-cost DWARF and SEH exception handling. | |||
471 | setOperationAction(ISD::EH_SJLJ_SETJMP, MVT::i32, Custom); | |||
472 | setOperationAction(ISD::EH_SJLJ_LONGJMP, MVT::Other, Custom); | |||
473 | setOperationAction(ISD::EH_SJLJ_SETUP_DISPATCH, MVT::Other, Custom); | |||
474 | if (TM.Options.ExceptionModel == ExceptionHandling::SjLj) | |||
475 | setLibcallName(RTLIB::UNWIND_RESUME, "_Unwind_SjLj_Resume"); | |||
476 | ||||
477 | // Darwin ABI issue. | |||
478 | for (auto VT : { MVT::i32, MVT::i64 }) { | |||
479 | if (VT == MVT::i64 && !Subtarget.is64Bit()) | |||
480 | continue; | |||
481 | setOperationAction(ISD::ConstantPool , VT, Custom); | |||
482 | setOperationAction(ISD::JumpTable , VT, Custom); | |||
483 | setOperationAction(ISD::GlobalAddress , VT, Custom); | |||
484 | setOperationAction(ISD::GlobalTLSAddress, VT, Custom); | |||
485 | setOperationAction(ISD::ExternalSymbol , VT, Custom); | |||
486 | setOperationAction(ISD::BlockAddress , VT, Custom); | |||
487 | } | |||
488 | ||||
489 | // 64-bit shl, sra, srl (iff 32-bit x86) | |||
490 | for (auto VT : { MVT::i32, MVT::i64 }) { | |||
491 | if (VT == MVT::i64 && !Subtarget.is64Bit()) | |||
492 | continue; | |||
493 | setOperationAction(ISD::SHL_PARTS, VT, Custom); | |||
494 | setOperationAction(ISD::SRA_PARTS, VT, Custom); | |||
495 | setOperationAction(ISD::SRL_PARTS, VT, Custom); | |||
496 | } | |||
497 | ||||
498 | if (Subtarget.hasSSEPrefetch() || Subtarget.has3DNow()) | |||
499 | setOperationAction(ISD::PREFETCH , MVT::Other, Legal); | |||
500 | ||||
501 | setOperationAction(ISD::ATOMIC_FENCE , MVT::Other, Custom); | |||
502 | ||||
503 | // Expand certain atomics | |||
504 | for (auto VT : { MVT::i8, MVT::i16, MVT::i32, MVT::i64 }) { | |||
505 | setOperationAction(ISD::ATOMIC_CMP_SWAP_WITH_SUCCESS, VT, Custom); | |||
506 | setOperationAction(ISD::ATOMIC_LOAD_SUB, VT, Custom); | |||
507 | setOperationAction(ISD::ATOMIC_LOAD_ADD, VT, Custom); | |||
508 | setOperationAction(ISD::ATOMIC_LOAD_OR, VT, Custom); | |||
509 | setOperationAction(ISD::ATOMIC_LOAD_XOR, VT, Custom); | |||
510 | setOperationAction(ISD::ATOMIC_LOAD_AND, VT, Custom); | |||
511 | setOperationAction(ISD::ATOMIC_STORE, VT, Custom); | |||
512 | } | |||
513 | ||||
514 | if (!Subtarget.is64Bit()) | |||
515 | setOperationAction(ISD::ATOMIC_LOAD, MVT::i64, Custom); | |||
516 | ||||
517 | if (Subtarget.hasCmpxchg16b()) { | |||
518 | setOperationAction(ISD::ATOMIC_CMP_SWAP_WITH_SUCCESS, MVT::i128, Custom); | |||
519 | } | |||
520 | ||||
521 | // FIXME - use subtarget debug flags | |||
522 | if (!Subtarget.isTargetDarwin() && !Subtarget.isTargetELF() && | |||
523 | !Subtarget.isTargetCygMing() && !Subtarget.isTargetWin64() && | |||
524 | TM.Options.ExceptionModel != ExceptionHandling::SjLj) { | |||
525 | setOperationAction(ISD::EH_LABEL, MVT::Other, Expand); | |||
526 | } | |||
527 | ||||
528 | setOperationAction(ISD::FRAME_TO_ARGS_OFFSET, MVT::i32, Custom); | |||
529 | setOperationAction(ISD::FRAME_TO_ARGS_OFFSET, MVT::i64, Custom); | |||
530 | ||||
531 | setOperationAction(ISD::INIT_TRAMPOLINE, MVT::Other, Custom); | |||
532 | setOperationAction(ISD::ADJUST_TRAMPOLINE, MVT::Other, Custom); | |||
533 | ||||
534 | setOperationAction(ISD::TRAP, MVT::Other, Legal); | |||
535 | setOperationAction(ISD::DEBUGTRAP, MVT::Other, Legal); | |||
536 | setOperationAction(ISD::UBSANTRAP, MVT::Other, Legal); | |||
537 | ||||
538 | // VASTART needs to be custom lowered to use the VarArgsFrameIndex | |||
539 | setOperationAction(ISD::VASTART , MVT::Other, Custom); | |||
540 | setOperationAction(ISD::VAEND , MVT::Other, Expand); | |||
541 | bool Is64Bit = Subtarget.is64Bit(); | |||
542 | setOperationAction(ISD::VAARG, MVT::Other, Is64Bit ? Custom : Expand); | |||
543 | setOperationAction(ISD::VACOPY, MVT::Other, Is64Bit ? Custom : Expand); | |||
544 | ||||
545 | setOperationAction(ISD::STACKSAVE, MVT::Other, Expand); | |||
546 | setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand); | |||
547 | ||||
548 | setOperationAction(ISD::DYNAMIC_STACKALLOC, PtrVT, Custom); | |||
549 | ||||
550 | // GC_TRANSITION_START and GC_TRANSITION_END need custom lowering. | |||
551 | setOperationAction(ISD::GC_TRANSITION_START, MVT::Other, Custom); | |||
552 | setOperationAction(ISD::GC_TRANSITION_END, MVT::Other, Custom); | |||
553 | ||||
554 | if (!Subtarget.useSoftFloat() && X86ScalarSSEf64) { | |||
555 | // f32 and f64 use SSE. | |||
556 | // Set up the FP register classes. | |||
557 | addRegisterClass(MVT::f32, Subtarget.hasAVX512() ? &X86::FR32XRegClass | |||
558 | : &X86::FR32RegClass); | |||
559 | addRegisterClass(MVT::f64, Subtarget.hasAVX512() ? &X86::FR64XRegClass | |||
560 | : &X86::FR64RegClass); | |||
561 | ||||
562 | // Disable f32->f64 extload as we can only generate this in one instruction | |||
563 | // under optsize. So its easier to pattern match (fpext (load)) for that | |||
564 | // case instead of needing to emit 2 instructions for extload in the | |||
565 | // non-optsize case. | |||
566 | setLoadExtAction(ISD::EXTLOAD, MVT::f64, MVT::f32, Expand); | |||
567 | ||||
568 | for (auto VT : { MVT::f32, MVT::f64 }) { | |||
569 | // Use ANDPD to simulate FABS. | |||
570 | setOperationAction(ISD::FABS, VT, Custom); | |||
571 | ||||
572 | // Use XORP to simulate FNEG. | |||
573 | setOperationAction(ISD::FNEG, VT, Custom); | |||
574 | ||||
575 | // Use ANDPD and ORPD to simulate FCOPYSIGN. | |||
576 | setOperationAction(ISD::FCOPYSIGN, VT, Custom); | |||
577 | ||||
578 | // These might be better off as horizontal vector ops. | |||
579 | setOperationAction(ISD::FADD, VT, Custom); | |||
580 | setOperationAction(ISD::FSUB, VT, Custom); | |||
581 | ||||
582 | // We don't support sin/cos/fmod | |||
583 | setOperationAction(ISD::FSIN , VT, Expand); | |||
584 | setOperationAction(ISD::FCOS , VT, Expand); | |||
585 | setOperationAction(ISD::FSINCOS, VT, Expand); | |||
586 | } | |||
587 | ||||
588 | // Lower this to MOVMSK plus an AND. | |||
589 | setOperationAction(ISD::FGETSIGN, MVT::i64, Custom); | |||
590 | setOperationAction(ISD::FGETSIGN, MVT::i32, Custom); | |||
591 | ||||
592 | } else if (!Subtarget.useSoftFloat() && X86ScalarSSEf32 && | |||
593 | (UseX87 || Is64Bit)) { | |||
594 | // Use SSE for f32, x87 for f64. | |||
595 | // Set up the FP register classes. | |||
596 | addRegisterClass(MVT::f32, &X86::FR32RegClass); | |||
597 | if (UseX87) | |||
598 | addRegisterClass(MVT::f64, &X86::RFP64RegClass); | |||
599 | ||||
600 | // Use ANDPS to simulate FABS. | |||
601 | setOperationAction(ISD::FABS , MVT::f32, Custom); | |||
602 | ||||
603 | // Use XORP to simulate FNEG. | |||
604 | setOperationAction(ISD::FNEG , MVT::f32, Custom); | |||
605 | ||||
606 | if (UseX87) | |||
607 | setOperationAction(ISD::UNDEF, MVT::f64, Expand); | |||
608 | ||||
609 | // Use ANDPS and ORPS to simulate FCOPYSIGN. | |||
610 | if (UseX87) | |||
611 | setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand); | |||
612 | setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom); | |||
613 | ||||
614 | // We don't support sin/cos/fmod | |||
615 | setOperationAction(ISD::FSIN , MVT::f32, Expand); | |||
616 | setOperationAction(ISD::FCOS , MVT::f32, Expand); | |||
617 | setOperationAction(ISD::FSINCOS, MVT::f32, Expand); | |||
618 | ||||
619 | if (UseX87) { | |||
620 | // Always expand sin/cos functions even though x87 has an instruction. | |||
621 | setOperationAction(ISD::FSIN, MVT::f64, Expand); | |||
622 | setOperationAction(ISD::FCOS, MVT::f64, Expand); | |||
623 | setOperationAction(ISD::FSINCOS, MVT::f64, Expand); | |||
624 | } | |||
625 | } else if (UseX87) { | |||
626 | // f32 and f64 in x87. | |||
627 | // Set up the FP register classes. | |||
628 | addRegisterClass(MVT::f64, &X86::RFP64RegClass); | |||
629 | addRegisterClass(MVT::f32, &X86::RFP32RegClass); | |||
630 | ||||
631 | for (auto VT : { MVT::f32, MVT::f64 }) { | |||
632 | setOperationAction(ISD::UNDEF, VT, Expand); | |||
633 | setOperationAction(ISD::FCOPYSIGN, VT, Expand); | |||
634 | ||||
635 | // Always expand sin/cos functions even though x87 has an instruction. | |||
636 | setOperationAction(ISD::FSIN , VT, Expand); | |||
637 | setOperationAction(ISD::FCOS , VT, Expand); | |||
638 | setOperationAction(ISD::FSINCOS, VT, Expand); | |||
639 | } | |||
640 | } | |||
641 | ||||
642 | // Expand FP32 immediates into loads from the stack, save special cases. | |||
643 | if (isTypeLegal(MVT::f32)) { | |||
644 | if (UseX87 && (getRegClassFor(MVT::f32) == &X86::RFP32RegClass)) { | |||
645 | addLegalFPImmediate(APFloat(+0.0f)); // FLD0 | |||
646 | addLegalFPImmediate(APFloat(+1.0f)); // FLD1 | |||
647 | addLegalFPImmediate(APFloat(-0.0f)); // FLD0/FCHS | |||
648 | addLegalFPImmediate(APFloat(-1.0f)); // FLD1/FCHS | |||
649 | } else // SSE immediates. | |||
650 | addLegalFPImmediate(APFloat(+0.0f)); // xorps | |||
651 | } | |||
652 | // Expand FP64 immediates into loads from the stack, save special cases. | |||
653 | if (isTypeLegal(MVT::f64)) { | |||
654 | if (UseX87 && getRegClassFor(MVT::f64) == &X86::RFP64RegClass) { | |||
655 | addLegalFPImmediate(APFloat(+0.0)); // FLD0 | |||
656 | addLegalFPImmediate(APFloat(+1.0)); // FLD1 | |||
657 | addLegalFPImmediate(APFloat(-0.0)); // FLD0/FCHS | |||
658 | addLegalFPImmediate(APFloat(-1.0)); // FLD1/FCHS | |||
659 | } else // SSE immediates. | |||
660 | addLegalFPImmediate(APFloat(+0.0)); // xorpd | |||
661 | } | |||
662 | // Handle constrained floating-point operations of scalar. | |||
663 | setOperationAction(ISD::STRICT_FADD, MVT::f32, Legal); | |||
664 | setOperationAction(ISD::STRICT_FADD, MVT::f64, Legal); | |||
665 | setOperationAction(ISD::STRICT_FSUB, MVT::f32, Legal); | |||
666 | setOperationAction(ISD::STRICT_FSUB, MVT::f64, Legal); | |||
667 | setOperationAction(ISD::STRICT_FMUL, MVT::f32, Legal); | |||
668 | setOperationAction(ISD::STRICT_FMUL, MVT::f64, Legal); | |||
669 | setOperationAction(ISD::STRICT_FDIV, MVT::f32, Legal); | |||
670 | setOperationAction(ISD::STRICT_FDIV, MVT::f64, Legal); | |||
671 | setOperationAction(ISD::STRICT_FP_EXTEND, MVT::f64, Legal); | |||
672 | setOperationAction(ISD::STRICT_FP_ROUND, MVT::f32, Legal); | |||
673 | setOperationAction(ISD::STRICT_FP_ROUND, MVT::f64, Legal); | |||
674 | setOperationAction(ISD::STRICT_FSQRT, MVT::f32, Legal); | |||
675 | setOperationAction(ISD::STRICT_FSQRT, MVT::f64, Legal); | |||
676 | ||||
677 | // We don't support FMA. | |||
678 | setOperationAction(ISD::FMA, MVT::f64, Expand); | |||
679 | setOperationAction(ISD::FMA, MVT::f32, Expand); | |||
680 | ||||
681 | // f80 always uses X87. | |||
682 | if (UseX87) { | |||
683 | addRegisterClass(MVT::f80, &X86::RFP80RegClass); | |||
684 | setOperationAction(ISD::UNDEF, MVT::f80, Expand); | |||
685 | setOperationAction(ISD::FCOPYSIGN, MVT::f80, Expand); | |||
686 | { | |||
687 | APFloat TmpFlt = APFloat::getZero(APFloat::x87DoubleExtended()); | |||
688 | addLegalFPImmediate(TmpFlt); // FLD0 | |||
689 | TmpFlt.changeSign(); | |||
690 | addLegalFPImmediate(TmpFlt); // FLD0/FCHS | |||
691 | ||||
692 | bool ignored; | |||
693 | APFloat TmpFlt2(+1.0); | |||
694 | TmpFlt2.convert(APFloat::x87DoubleExtended(), APFloat::rmNearestTiesToEven, | |||
695 | &ignored); | |||
696 | addLegalFPImmediate(TmpFlt2); // FLD1 | |||
697 | TmpFlt2.changeSign(); | |||
698 | addLegalFPImmediate(TmpFlt2); // FLD1/FCHS | |||
699 | } | |||
700 | ||||
701 | // Always expand sin/cos functions even though x87 has an instruction. | |||
702 | setOperationAction(ISD::FSIN , MVT::f80, Expand); | |||
703 | setOperationAction(ISD::FCOS , MVT::f80, Expand); | |||
704 | setOperationAction(ISD::FSINCOS, MVT::f80, Expand); | |||
705 | ||||
706 | setOperationAction(ISD::FFLOOR, MVT::f80, Expand); | |||
707 | setOperationAction(ISD::FCEIL, MVT::f80, Expand); | |||
708 | setOperationAction(ISD::FTRUNC, MVT::f80, Expand); | |||
709 | setOperationAction(ISD::FRINT, MVT::f80, Expand); | |||
710 | setOperationAction(ISD::FNEARBYINT, MVT::f80, Expand); | |||
711 | setOperationAction(ISD::FMA, MVT::f80, Expand); | |||
712 | setOperationAction(ISD::LROUND, MVT::f80, Expand); | |||
713 | setOperationAction(ISD::LLROUND, MVT::f80, Expand); | |||
714 | setOperationAction(ISD::LRINT, MVT::f80, Custom); | |||
715 | setOperationAction(ISD::LLRINT, MVT::f80, Custom); | |||
716 | setOperationAction(ISD::ISNAN, MVT::f80, Custom); | |||
717 | ||||
718 | // Handle constrained floating-point operations of scalar. | |||
719 | setOperationAction(ISD::STRICT_FADD , MVT::f80, Legal); | |||
720 | setOperationAction(ISD::STRICT_FSUB , MVT::f80, Legal); | |||
721 | setOperationAction(ISD::STRICT_FMUL , MVT::f80, Legal); | |||
722 | setOperationAction(ISD::STRICT_FDIV , MVT::f80, Legal); | |||
723 | setOperationAction(ISD::STRICT_FSQRT , MVT::f80, Legal); | |||
724 | setOperationAction(ISD::STRICT_FP_EXTEND, MVT::f80, Legal); | |||
725 | // FIXME: When the target is 64-bit, STRICT_FP_ROUND will be overwritten | |||
726 | // as Custom. | |||
727 | setOperationAction(ISD::STRICT_FP_ROUND, MVT::f80, Legal); | |||
728 | } | |||
729 | ||||
730 | // f128 uses xmm registers, but most operations require libcalls. | |||
731 | if (!Subtarget.useSoftFloat() && Subtarget.is64Bit() && Subtarget.hasSSE1()) { | |||
732 | addRegisterClass(MVT::f128, Subtarget.hasVLX() ? &X86::VR128XRegClass | |||
733 | : &X86::VR128RegClass); | |||
734 | ||||
735 | addLegalFPImmediate(APFloat::getZero(APFloat::IEEEquad())); // xorps | |||
736 | ||||
737 | setOperationAction(ISD::FADD, MVT::f128, LibCall); | |||
738 | setOperationAction(ISD::STRICT_FADD, MVT::f128, LibCall); | |||
739 | setOperationAction(ISD::FSUB, MVT::f128, LibCall); | |||
740 | setOperationAction(ISD::STRICT_FSUB, MVT::f128, LibCall); | |||
741 | setOperationAction(ISD::FDIV, MVT::f128, LibCall); | |||
742 | setOperationAction(ISD::STRICT_FDIV, MVT::f128, LibCall); | |||
743 | setOperationAction(ISD::FMUL, MVT::f128, LibCall); | |||
744 | setOperationAction(ISD::STRICT_FMUL, MVT::f128, LibCall); | |||
745 | setOperationAction(ISD::FMA, MVT::f128, LibCall); | |||
746 | setOperationAction(ISD::STRICT_FMA, MVT::f128, LibCall); | |||
747 | ||||
748 | setOperationAction(ISD::FABS, MVT::f128, Custom); | |||
749 | setOperationAction(ISD::FNEG, MVT::f128, Custom); | |||
750 | setOperationAction(ISD::FCOPYSIGN, MVT::f128, Custom); | |||
751 | ||||
752 | setOperationAction(ISD::FSIN, MVT::f128, LibCall); | |||
753 | setOperationAction(ISD::STRICT_FSIN, MVT::f128, LibCall); | |||
754 | setOperationAction(ISD::FCOS, MVT::f128, LibCall); | |||
755 | setOperationAction(ISD::STRICT_FCOS, MVT::f128, LibCall); | |||
756 | setOperationAction(ISD::FSINCOS, MVT::f128, LibCall); | |||
757 | // No STRICT_FSINCOS | |||
758 | setOperationAction(ISD::FSQRT, MVT::f128, LibCall); | |||
759 | setOperationAction(ISD::STRICT_FSQRT, MVT::f128, LibCall); | |||
760 | ||||
761 | setOperationAction(ISD::FP_EXTEND, MVT::f128, Custom); | |||
762 | setOperationAction(ISD::STRICT_FP_EXTEND, MVT::f128, Custom); | |||
763 | // We need to custom handle any FP_ROUND with an f128 input, but | |||
764 | // LegalizeDAG uses the result type to know when to run a custom handler. | |||
765 | // So we have to list all legal floating point result types here. | |||
766 | if (isTypeLegal(MVT::f32)) { | |||
767 | setOperationAction(ISD::FP_ROUND, MVT::f32, Custom); | |||
768 | setOperationAction(ISD::STRICT_FP_ROUND, MVT::f32, Custom); | |||
769 | } | |||
770 | if (isTypeLegal(MVT::f64)) { | |||
771 | setOperationAction(ISD::FP_ROUND, MVT::f64, Custom); | |||
772 | setOperationAction(ISD::STRICT_FP_ROUND, MVT::f64, Custom); | |||
773 | } | |||
774 | if (isTypeLegal(MVT::f80)) { | |||
775 | setOperationAction(ISD::FP_ROUND, MVT::f80, Custom); | |||
776 | setOperationAction(ISD::STRICT_FP_ROUND, MVT::f80, Custom); | |||
777 | } | |||
778 | ||||
779 | setOperationAction(ISD::SETCC, MVT::f128, Custom); | |||
780 | ||||
781 | setLoadExtAction(ISD::EXTLOAD, MVT::f128, MVT::f32, Expand); | |||
782 | setLoadExtAction(ISD::EXTLOAD, MVT::f128, MVT::f64, Expand); | |||
783 | setLoadExtAction(ISD::EXTLOAD, MVT::f128, MVT::f80, Expand); | |||
784 | setTruncStoreAction(MVT::f128, MVT::f32, Expand); | |||
785 | setTruncStoreAction(MVT::f128, MVT::f64, Expand); | |||
786 | setTruncStoreAction(MVT::f128, MVT::f80, Expand); | |||
787 | } | |||
788 | ||||
789 | // Always use a library call for pow. | |||
790 | setOperationAction(ISD::FPOW , MVT::f32 , Expand); | |||
791 | setOperationAction(ISD::FPOW , MVT::f64 , Expand); | |||
792 | setOperationAction(ISD::FPOW , MVT::f80 , Expand); | |||
793 | setOperationAction(ISD::FPOW , MVT::f128 , Expand); | |||
794 | ||||
795 | setOperationAction(ISD::FLOG, MVT::f80, Expand); | |||
796 | setOperationAction(ISD::FLOG2, MVT::f80, Expand); | |||
797 | setOperationAction(ISD::FLOG10, MVT::f80, Expand); | |||
798 | setOperationAction(ISD::FEXP, MVT::f80, Expand); | |||
799 | setOperationAction(ISD::FEXP2, MVT::f80, Expand); | |||
800 | setOperationAction(ISD::FMINNUM, MVT::f80, Expand); | |||
801 | setOperationAction(ISD::FMAXNUM, MVT::f80, Expand); | |||
802 | ||||
803 | // Some FP actions are always expanded for vector types. | |||
804 | for (auto VT : { MVT::v4f32, MVT::v8f32, MVT::v16f32, | |||
805 | MVT::v2f64, MVT::v4f64, MVT::v8f64 }) { | |||
806 | setOperationAction(ISD::FSIN, VT, Expand); | |||
807 | setOperationAction(ISD::FSINCOS, VT, Expand); | |||
808 | setOperationAction(ISD::FCOS, VT, Expand); | |||
809 | setOperationAction(ISD::FREM, VT, Expand); | |||
810 | setOperationAction(ISD::FCOPYSIGN, VT, Expand); | |||
811 | setOperationAction(ISD::FPOW, VT, Expand); | |||
812 | setOperationAction(ISD::FLOG, VT, Expand); | |||
813 | setOperationAction(ISD::FLOG2, VT, Expand); | |||
814 | setOperationAction(ISD::FLOG10, VT, Expand); | |||
815 | setOperationAction(ISD::FEXP, VT, Expand); | |||
816 | setOperationAction(ISD::FEXP2, VT, Expand); | |||
817 | } | |||
818 | ||||
819 | // First set operation action for all vector types to either promote | |||
820 | // (for widening) or expand (for scalarization). Then we will selectively | |||
821 | // turn on ones that can be effectively codegen'd. | |||
822 | for (MVT VT : MVT::fixedlen_vector_valuetypes()) { | |||
823 | setOperationAction(ISD::SDIV, VT, Expand); | |||
824 | setOperationAction(ISD::UDIV, VT, Expand); | |||
825 | setOperationAction(ISD::SREM, VT, Expand); | |||
826 | setOperationAction(ISD::UREM, VT, Expand); | |||
827 | setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT,Expand); | |||
828 | setOperationAction(ISD::INSERT_VECTOR_ELT, VT, Expand); | |||
829 | setOperationAction(ISD::EXTRACT_SUBVECTOR, VT,Expand); | |||
830 | setOperationAction(ISD::INSERT_SUBVECTOR, VT,Expand); | |||
831 | setOperationAction(ISD::FMA, VT, Expand); | |||
832 | setOperationAction(ISD::FFLOOR, VT, Expand); | |||
833 | setOperationAction(ISD::FCEIL, VT, Expand); | |||
834 | setOperationAction(ISD::FTRUNC, VT, Expand); | |||
835 | setOperationAction(ISD::FRINT, VT, Expand); | |||
836 | setOperationAction(ISD::FNEARBYINT, VT, Expand); | |||
837 | setOperationAction(ISD::SMUL_LOHI, VT, Expand); | |||
838 | setOperationAction(ISD::MULHS, VT, Expand); | |||
839 | setOperationAction(ISD::UMUL_LOHI, VT, Expand); | |||
840 | setOperationAction(ISD::MULHU, VT, Expand); | |||
841 | setOperationAction(ISD::SDIVREM, VT, Expand); | |||
842 | setOperationAction(ISD::UDIVREM, VT, Expand); | |||
843 | setOperationAction(ISD::CTPOP, VT, Expand); | |||
844 | setOperationAction(ISD::CTTZ, VT, Expand); | |||
845 | setOperationAction(ISD::CTLZ, VT, Expand); | |||
846 | setOperationAction(ISD::ROTL, VT, Expand); | |||
847 | setOperationAction(ISD::ROTR, VT, Expand); | |||
848 | setOperationAction(ISD::BSWAP, VT, Expand); | |||
849 | setOperationAction(ISD::SETCC, VT, Expand); | |||
850 | setOperationAction(ISD::FP_TO_UINT, VT, Expand); | |||
851 | setOperationAction(ISD::FP_TO_SINT, VT, Expand); | |||
852 | setOperationAction(ISD::UINT_TO_FP, VT, Expand); | |||
853 | setOperationAction(ISD::SINT_TO_FP, VT, Expand); | |||
854 | setOperationAction(ISD::SIGN_EXTEND_INREG, VT,Expand); | |||
855 | setOperationAction(ISD::TRUNCATE, VT, Expand); | |||
856 | setOperationAction(ISD::SIGN_EXTEND, VT, Expand); | |||
857 | setOperationAction(ISD::ZERO_EXTEND, VT, Expand); | |||
858 | setOperationAction(ISD::ANY_EXTEND, VT, Expand); | |||
859 | setOperationAction(ISD::SELECT_CC, VT, Expand); | |||
860 | for (MVT InnerVT : MVT::fixedlen_vector_valuetypes()) { | |||
861 | setTruncStoreAction(InnerVT, VT, Expand); | |||
862 | ||||
863 | setLoadExtAction(ISD::SEXTLOAD, InnerVT, VT, Expand); | |||
864 | setLoadExtAction(ISD::ZEXTLOAD, InnerVT, VT, Expand); | |||
865 | ||||
866 | // N.b. ISD::EXTLOAD legality is basically ignored except for i1-like | |||
867 | // types, we have to deal with them whether we ask for Expansion or not. | |||
868 | // Setting Expand causes its own optimisation problems though, so leave | |||
869 | // them legal. | |||
870 | if (VT.getVectorElementType() == MVT::i1) | |||
871 | setLoadExtAction(ISD::EXTLOAD, InnerVT, VT, Expand); | |||
872 | ||||
873 | // EXTLOAD for MVT::f16 vectors is not legal because f16 vectors are | |||
874 | // split/scalarized right now. | |||
875 | if (VT.getVectorElementType() == MVT::f16) | |||
876 | setLoadExtAction(ISD::EXTLOAD, InnerVT, VT, Expand); | |||
877 | } | |||
878 | } | |||
879 | ||||
880 | // FIXME: In order to prevent SSE instructions being expanded to MMX ones | |||
881 | // with -msoft-float, disable use of MMX as well. | |||
882 | if (!Subtarget.useSoftFloat() && Subtarget.hasMMX()) { | |||
883 | addRegisterClass(MVT::x86mmx, &X86::VR64RegClass); | |||
884 | // No operations on x86mmx supported, everything uses intrinsics. | |||
885 | } | |||
886 | ||||
887 | if (!Subtarget.useSoftFloat() && Subtarget.hasSSE1()) { | |||
888 | addRegisterClass(MVT::v4f32, Subtarget.hasVLX() ? &X86::VR128XRegClass | |||
889 | : &X86::VR128RegClass); | |||
890 | ||||
891 | setOperationAction(ISD::FNEG, MVT::v4f32, Custom); | |||
892 | setOperationAction(ISD::FABS, MVT::v4f32, Custom); | |||
893 | setOperationAction(ISD::FCOPYSIGN, MVT::v4f32, Custom); | |||
894 | setOperationAction(ISD::BUILD_VECTOR, MVT::v4f32, Custom); | |||
895 | setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v4f32, Custom); | |||
896 | setOperationAction(ISD::VSELECT, MVT::v4f32, Custom); | |||
897 | setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4f32, Custom); | |||
898 | setOperationAction(ISD::SELECT, MVT::v4f32, Custom); | |||
899 | ||||
900 | setOperationAction(ISD::LOAD, MVT::v2f32, Custom); | |||
901 | setOperationAction(ISD::STORE, MVT::v2f32, Custom); | |||
902 | ||||
903 | setOperationAction(ISD::STRICT_FADD, MVT::v4f32, Legal); | |||
904 | setOperationAction(ISD::STRICT_FSUB, MVT::v4f32, Legal); | |||
905 | setOperationAction(ISD::STRICT_FMUL, MVT::v4f32, Legal); | |||
906 | setOperationAction(ISD::STRICT_FDIV, MVT::v4f32, Legal); | |||
907 | setOperationAction(ISD::STRICT_FSQRT, MVT::v4f32, Legal); | |||
908 | } | |||
909 | ||||
910 | if (!Subtarget.useSoftFloat() && Subtarget.hasSSE2()) { | |||
911 | addRegisterClass(MVT::v2f64, Subtarget.hasVLX() ? &X86::VR128XRegClass | |||
912 | : &X86::VR128RegClass); | |||
913 | ||||
914 | // FIXME: Unfortunately, -soft-float and -no-implicit-float mean XMM | |||
915 | // registers cannot be used even for integer operations. | |||
916 | addRegisterClass(MVT::v16i8, Subtarget.hasVLX() ? &X86::VR128XRegClass | |||
917 | : &X86::VR128RegClass); | |||
918 | addRegisterClass(MVT::v8i16, Subtarget.hasVLX() ? &X86::VR128XRegClass | |||
919 | : &X86::VR128RegClass); | |||
920 | addRegisterClass(MVT::v4i32, Subtarget.hasVLX() ? &X86::VR128XRegClass | |||
921 | : &X86::VR128RegClass); | |||
922 | addRegisterClass(MVT::v2i64, Subtarget.hasVLX() ? &X86::VR128XRegClass | |||
923 | : &X86::VR128RegClass); | |||
924 | ||||
925 | for (auto VT : { MVT::v2i8, MVT::v4i8, MVT::v8i8, | |||
926 | MVT::v2i16, MVT::v4i16, MVT::v2i32 }) { | |||
927 | setOperationAction(ISD::SDIV, VT, Custom); | |||
928 | setOperationAction(ISD::SREM, VT, Custom); | |||
929 | setOperationAction(ISD::UDIV, VT, Custom); | |||
930 | setOperationAction(ISD::UREM, VT, Custom); | |||
931 | } | |||
932 | ||||
933 | setOperationAction(ISD::MUL, MVT::v2i8, Custom); | |||
934 | setOperationAction(ISD::MUL, MVT::v4i8, Custom); | |||
935 | setOperationAction(ISD::MUL, MVT::v8i8, Custom); | |||
936 | ||||
937 | setOperationAction(ISD::MUL, MVT::v16i8, Custom); | |||
938 | setOperationAction(ISD::MUL, MVT::v4i32, Custom); | |||
939 | setOperationAction(ISD::MUL, MVT::v2i64, Custom); | |||
940 | setOperationAction(ISD::MULHU, MVT::v4i32, Custom); | |||
941 | setOperationAction(ISD::MULHS, MVT::v4i32, Custom); | |||
942 | setOperationAction(ISD::MULHU, MVT::v16i8, Custom); | |||
943 | setOperationAction(ISD::MULHS, MVT::v16i8, Custom); | |||
944 | setOperationAction(ISD::MULHU, MVT::v8i16, Legal); | |||
945 | setOperationAction(ISD::MULHS, MVT::v8i16, Legal); | |||
946 | setOperationAction(ISD::MUL, MVT::v8i16, Legal); | |||
947 | ||||
948 | setOperationAction(ISD::SMULO, MVT::v16i8, Custom); | |||
949 | setOperationAction(ISD::UMULO, MVT::v16i8, Custom); | |||
950 | ||||
951 | setOperationAction(ISD::FNEG, MVT::v2f64, Custom); | |||
952 | setOperationAction(ISD::FABS, MVT::v2f64, Custom); | |||
953 | setOperationAction(ISD::FCOPYSIGN, MVT::v2f64, Custom); | |||
954 | ||||
955 | for (auto VT : { MVT::v16i8, MVT::v8i16, MVT::v4i32, MVT::v2i64 }) { | |||
956 | setOperationAction(ISD::SMAX, VT, VT == MVT::v8i16 ? Legal : Custom); | |||
957 | setOperationAction(ISD::SMIN, VT, VT == MVT::v8i16 ? Legal : Custom); | |||
958 | setOperationAction(ISD::UMAX, VT, VT == MVT::v16i8 ? Legal : Custom); | |||
959 | setOperationAction(ISD::UMIN, VT, VT == MVT::v16i8 ? Legal : Custom); | |||
960 | } | |||
961 | ||||
962 | setOperationAction(ISD::UADDSAT, MVT::v16i8, Legal); | |||
963 | setOperationAction(ISD::SADDSAT, MVT::v16i8, Legal); | |||
964 | setOperationAction(ISD::USUBSAT, MVT::v16i8, Legal); | |||
965 | setOperationAction(ISD::SSUBSAT, MVT::v16i8, Legal); | |||
966 | setOperationAction(ISD::UADDSAT, MVT::v8i16, Legal); | |||
967 | setOperationAction(ISD::SADDSAT, MVT::v8i16, Legal); | |||
968 | setOperationAction(ISD::USUBSAT, MVT::v8i16, Legal); | |||
969 | setOperationAction(ISD::SSUBSAT, MVT::v8i16, Legal); | |||
970 | setOperationAction(ISD::USUBSAT, MVT::v4i32, Custom); | |||
971 | setOperationAction(ISD::USUBSAT, MVT::v2i64, Custom); | |||
972 | ||||
973 | setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8i16, Custom); | |||
974 | setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4i32, Custom); | |||
975 | setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4f32, Custom); | |||
976 | ||||
977 | for (auto VT : { MVT::v16i8, MVT::v8i16, MVT::v4i32, MVT::v2i64 }) { | |||
978 | setOperationAction(ISD::SETCC, VT, Custom); | |||
979 | setOperationAction(ISD::STRICT_FSETCC, VT, Custom); | |||
980 | setOperationAction(ISD::STRICT_FSETCCS, VT, Custom); | |||
981 | setOperationAction(ISD::CTPOP, VT, Custom); | |||
982 | setOperationAction(ISD::ABS, VT, Custom); | |||
983 | ||||
984 | // The condition codes aren't legal in SSE/AVX and under AVX512 we use | |||
985 | // setcc all the way to isel and prefer SETGT in some isel patterns. | |||
986 | setCondCodeAction(ISD::SETLT, VT, Custom); | |||
987 | setCondCodeAction(ISD::SETLE, VT, Custom); | |||
988 | } | |||
989 | ||||
990 | for (auto VT : { MVT::v16i8, MVT::v8i16, MVT::v4i32 }) { | |||
991 | setOperationAction(ISD::SCALAR_TO_VECTOR, VT, Custom); | |||
992 | setOperationAction(ISD::BUILD_VECTOR, VT, Custom); | |||
993 | setOperationAction(ISD::VECTOR_SHUFFLE, VT, Custom); | |||
994 | setOperationAction(ISD::VSELECT, VT, Custom); | |||
995 | setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Custom); | |||
996 | } | |||
997 | ||||
998 | for (auto VT : { MVT::v2f64, MVT::v2i64 }) { | |||
999 | setOperationAction(ISD::BUILD_VECTOR, VT, Custom); | |||
1000 | setOperationAction(ISD::VECTOR_SHUFFLE, VT, Custom); | |||
1001 | setOperationAction(ISD::VSELECT, VT, Custom); | |||
1002 | ||||
1003 | if (VT == MVT::v2i64 && !Subtarget.is64Bit()) | |||
1004 | continue; | |||
1005 | ||||
1006 | setOperationAction(ISD::INSERT_VECTOR_ELT, VT, Custom); | |||
1007 | setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Custom); | |||
1008 | } | |||
1009 | ||||
1010 | // Custom lower v2i64 and v2f64 selects. | |||
1011 | setOperationAction(ISD::SELECT, MVT::v2f64, Custom); | |||
1012 | setOperationAction(ISD::SELECT, MVT::v2i64, Custom); | |||
1013 | setOperationAction(ISD::SELECT, MVT::v4i32, Custom); | |||
1014 | setOperationAction(ISD::SELECT, MVT::v8i16, Custom); | |||
1015 | setOperationAction(ISD::SELECT, MVT::v16i8, Custom); | |||
1016 | ||||
1017 | setOperationAction(ISD::FP_TO_SINT, MVT::v4i32, Legal); | |||
1018 | setOperationAction(ISD::FP_TO_UINT, MVT::v4i32, Custom); | |||
1019 | setOperationAction(ISD::FP_TO_SINT, MVT::v2i32, Custom); | |||
1020 | setOperationAction(ISD::FP_TO_UINT, MVT::v2i32, Custom); | |||
1021 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::v4i32, Legal); | |||
1022 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::v2i32, Custom); | |||
1023 | ||||
1024 | // Custom legalize these to avoid over promotion or custom promotion. | |||
1025 | for (auto VT : {MVT::v2i8, MVT::v4i8, MVT::v8i8, MVT::v2i16, MVT::v4i16}) { | |||
1026 | setOperationAction(ISD::FP_TO_SINT, VT, Custom); | |||
1027 | setOperationAction(ISD::FP_TO_UINT, VT, Custom); | |||
1028 | setOperationAction(ISD::STRICT_FP_TO_SINT, VT, Custom); | |||
1029 | setOperationAction(ISD::STRICT_FP_TO_UINT, VT, Custom); | |||
1030 | } | |||
1031 | ||||
1032 | setOperationAction(ISD::SINT_TO_FP, MVT::v4i32, Legal); | |||
1033 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::v4i32, Legal); | |||
1034 | setOperationAction(ISD::SINT_TO_FP, MVT::v2i32, Custom); | |||
1035 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::v2i32, Custom); | |||
1036 | ||||
1037 | setOperationAction(ISD::UINT_TO_FP, MVT::v2i32, Custom); | |||
1038 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v2i32, Custom); | |||
1039 | ||||
1040 | setOperationAction(ISD::UINT_TO_FP, MVT::v4i32, Custom); | |||
1041 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v4i32, Custom); | |||
1042 | ||||
1043 | // Fast v2f32 UINT_TO_FP( v2i32 ) custom conversion. | |||
1044 | setOperationAction(ISD::SINT_TO_FP, MVT::v2f32, Custom); | |||
1045 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::v2f32, Custom); | |||
1046 | setOperationAction(ISD::UINT_TO_FP, MVT::v2f32, Custom); | |||
1047 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v2f32, Custom); | |||
1048 | ||||
1049 | setOperationAction(ISD::FP_EXTEND, MVT::v2f32, Custom); | |||
1050 | setOperationAction(ISD::STRICT_FP_EXTEND, MVT::v2f32, Custom); | |||
1051 | setOperationAction(ISD::FP_ROUND, MVT::v2f32, Custom); | |||
1052 | setOperationAction(ISD::STRICT_FP_ROUND, MVT::v2f32, Custom); | |||
1053 | ||||
1054 | // We want to legalize this to an f64 load rather than an i64 load on | |||
1055 | // 64-bit targets and two 32-bit loads on a 32-bit target. Similar for | |||
1056 | // store. | |||
1057 | setOperationAction(ISD::LOAD, MVT::v2i32, Custom); | |||
1058 | setOperationAction(ISD::LOAD, MVT::v4i16, Custom); | |||
1059 | setOperationAction(ISD::LOAD, MVT::v8i8, Custom); | |||
1060 | setOperationAction(ISD::STORE, MVT::v2i32, Custom); | |||
1061 | setOperationAction(ISD::STORE, MVT::v4i16, Custom); | |||
1062 | setOperationAction(ISD::STORE, MVT::v8i8, Custom); | |||
1063 | ||||
1064 | setOperationAction(ISD::BITCAST, MVT::v2i32, Custom); | |||
1065 | setOperationAction(ISD::BITCAST, MVT::v4i16, Custom); | |||
1066 | setOperationAction(ISD::BITCAST, MVT::v8i8, Custom); | |||
1067 | if (!Subtarget.hasAVX512()) | |||
1068 | setOperationAction(ISD::BITCAST, MVT::v16i1, Custom); | |||
1069 | ||||
1070 | setOperationAction(ISD::SIGN_EXTEND_VECTOR_INREG, MVT::v2i64, Custom); | |||
1071 | setOperationAction(ISD::SIGN_EXTEND_VECTOR_INREG, MVT::v4i32, Custom); | |||
1072 | setOperationAction(ISD::SIGN_EXTEND_VECTOR_INREG, MVT::v8i16, Custom); | |||
1073 | ||||
1074 | setOperationAction(ISD::SIGN_EXTEND, MVT::v4i64, Custom); | |||
1075 | ||||
1076 | setOperationAction(ISD::TRUNCATE, MVT::v2i8, Custom); | |||
1077 | setOperationAction(ISD::TRUNCATE, MVT::v2i16, Custom); | |||
1078 | setOperationAction(ISD::TRUNCATE, MVT::v2i32, Custom); | |||
1079 | setOperationAction(ISD::TRUNCATE, MVT::v4i8, Custom); | |||
1080 | setOperationAction(ISD::TRUNCATE, MVT::v4i16, Custom); | |||
1081 | setOperationAction(ISD::TRUNCATE, MVT::v8i8, Custom); | |||
1082 | ||||
1083 | // In the customized shift lowering, the legal v4i32/v2i64 cases | |||
1084 | // in AVX2 will be recognized. | |||
1085 | for (auto VT : { MVT::v16i8, MVT::v8i16, MVT::v4i32, MVT::v2i64 }) { | |||
1086 | setOperationAction(ISD::SRL, VT, Custom); | |||
1087 | setOperationAction(ISD::SHL, VT, Custom); | |||
1088 | setOperationAction(ISD::SRA, VT, Custom); | |||
1089 | } | |||
1090 | ||||
1091 | setOperationAction(ISD::ROTL, MVT::v4i32, Custom); | |||
1092 | setOperationAction(ISD::ROTL, MVT::v8i16, Custom); | |||
1093 | ||||
1094 | // With 512-bit registers or AVX512VL+BW, expanding (and promoting the | |||
1095 | // shifts) is better. | |||
1096 | if (!Subtarget.useAVX512Regs() && | |||
1097 | !(Subtarget.hasBWI() && Subtarget.hasVLX())) | |||
1098 | setOperationAction(ISD::ROTL, MVT::v16i8, Custom); | |||
1099 | ||||
1100 | setOperationAction(ISD::STRICT_FSQRT, MVT::v2f64, Legal); | |||
1101 | setOperationAction(ISD::STRICT_FADD, MVT::v2f64, Legal); | |||
1102 | setOperationAction(ISD::STRICT_FSUB, MVT::v2f64, Legal); | |||
1103 | setOperationAction(ISD::STRICT_FMUL, MVT::v2f64, Legal); | |||
1104 | setOperationAction(ISD::STRICT_FDIV, MVT::v2f64, Legal); | |||
1105 | } | |||
1106 | ||||
1107 | if (!Subtarget.useSoftFloat() && Subtarget.hasSSSE3()) { | |||
1108 | setOperationAction(ISD::ABS, MVT::v16i8, Legal); | |||
1109 | setOperationAction(ISD::ABS, MVT::v8i16, Legal); | |||
1110 | setOperationAction(ISD::ABS, MVT::v4i32, Legal); | |||
1111 | setOperationAction(ISD::BITREVERSE, MVT::v16i8, Custom); | |||
1112 | setOperationAction(ISD::CTLZ, MVT::v16i8, Custom); | |||
1113 | setOperationAction(ISD::CTLZ, MVT::v8i16, Custom); | |||
1114 | setOperationAction(ISD::CTLZ, MVT::v4i32, Custom); | |||
1115 | setOperationAction(ISD::CTLZ, MVT::v2i64, Custom); | |||
1116 | ||||
1117 | // These might be better off as horizontal vector ops. | |||
1118 | setOperationAction(ISD::ADD, MVT::i16, Custom); | |||
1119 | setOperationAction(ISD::ADD, MVT::i32, Custom); | |||
1120 | setOperationAction(ISD::SUB, MVT::i16, Custom); | |||
1121 | setOperationAction(ISD::SUB, MVT::i32, Custom); | |||
1122 | } | |||
1123 | ||||
1124 | if (!Subtarget.useSoftFloat() && Subtarget.hasSSE41()) { | |||
1125 | for (MVT RoundedTy : {MVT::f32, MVT::f64, MVT::v4f32, MVT::v2f64}) { | |||
1126 | setOperationAction(ISD::FFLOOR, RoundedTy, Legal); | |||
1127 | setOperationAction(ISD::STRICT_FFLOOR, RoundedTy, Legal); | |||
1128 | setOperationAction(ISD::FCEIL, RoundedTy, Legal); | |||
1129 | setOperationAction(ISD::STRICT_FCEIL, RoundedTy, Legal); | |||
1130 | setOperationAction(ISD::FTRUNC, RoundedTy, Legal); | |||
1131 | setOperationAction(ISD::STRICT_FTRUNC, RoundedTy, Legal); | |||
1132 | setOperationAction(ISD::FRINT, RoundedTy, Legal); | |||
1133 | setOperationAction(ISD::STRICT_FRINT, RoundedTy, Legal); | |||
1134 | setOperationAction(ISD::FNEARBYINT, RoundedTy, Legal); | |||
1135 | setOperationAction(ISD::STRICT_FNEARBYINT, RoundedTy, Legal); | |||
1136 | setOperationAction(ISD::FROUNDEVEN, RoundedTy, Legal); | |||
1137 | setOperationAction(ISD::STRICT_FROUNDEVEN, RoundedTy, Legal); | |||
1138 | ||||
1139 | setOperationAction(ISD::FROUND, RoundedTy, Custom); | |||
1140 | } | |||
1141 | ||||
1142 | setOperationAction(ISD::SMAX, MVT::v16i8, Legal); | |||
1143 | setOperationAction(ISD::SMAX, MVT::v4i32, Legal); | |||
1144 | setOperationAction(ISD::UMAX, MVT::v8i16, Legal); | |||
1145 | setOperationAction(ISD::UMAX, MVT::v4i32, Legal); | |||
1146 | setOperationAction(ISD::SMIN, MVT::v16i8, Legal); | |||
1147 | setOperationAction(ISD::SMIN, MVT::v4i32, Legal); | |||
1148 | setOperationAction(ISD::UMIN, MVT::v8i16, Legal); | |||
1149 | setOperationAction(ISD::UMIN, MVT::v4i32, Legal); | |||
1150 | ||||
1151 | setOperationAction(ISD::UADDSAT, MVT::v4i32, Custom); | |||
1152 | setOperationAction(ISD::SADDSAT, MVT::v2i64, Custom); | |||
1153 | setOperationAction(ISD::SSUBSAT, MVT::v2i64, Custom); | |||
1154 | ||||
1155 | // FIXME: Do we need to handle scalar-to-vector here? | |||
1156 | setOperationAction(ISD::MUL, MVT::v4i32, Legal); | |||
1157 | ||||
1158 | // We directly match byte blends in the backend as they match the VSELECT | |||
1159 | // condition form. | |||
1160 | setOperationAction(ISD::VSELECT, MVT::v16i8, Legal); | |||
1161 | ||||
1162 | // SSE41 brings specific instructions for doing vector sign extend even in | |||
1163 | // cases where we don't have SRA. | |||
1164 | for (auto VT : { MVT::v8i16, MVT::v4i32, MVT::v2i64 }) { | |||
1165 | setOperationAction(ISD::SIGN_EXTEND_VECTOR_INREG, VT, Legal); | |||
1166 | setOperationAction(ISD::ZERO_EXTEND_VECTOR_INREG, VT, Legal); | |||
1167 | } | |||
1168 | ||||
1169 | // SSE41 also has vector sign/zero extending loads, PMOV[SZ]X | |||
1170 | for (auto LoadExtOp : { ISD::SEXTLOAD, ISD::ZEXTLOAD }) { | |||
1171 | setLoadExtAction(LoadExtOp, MVT::v8i16, MVT::v8i8, Legal); | |||
1172 | setLoadExtAction(LoadExtOp, MVT::v4i32, MVT::v4i8, Legal); | |||
1173 | setLoadExtAction(LoadExtOp, MVT::v2i64, MVT::v2i8, Legal); | |||
1174 | setLoadExtAction(LoadExtOp, MVT::v4i32, MVT::v4i16, Legal); | |||
1175 | setLoadExtAction(LoadExtOp, MVT::v2i64, MVT::v2i16, Legal); | |||
1176 | setLoadExtAction(LoadExtOp, MVT::v2i64, MVT::v2i32, Legal); | |||
1177 | } | |||
1178 | ||||
1179 | // i8 vectors are custom because the source register and source | |||
1180 | // source memory operand types are not the same width. | |||
1181 | setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v16i8, Custom); | |||
1182 | ||||
1183 | if (Subtarget.is64Bit() && !Subtarget.hasAVX512()) { | |||
1184 | // We need to scalarize v4i64->v432 uint_to_fp using cvtsi2ss, but we can | |||
1185 | // do the pre and post work in the vector domain. | |||
1186 | setOperationAction(ISD::UINT_TO_FP, MVT::v4i64, Custom); | |||
1187 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v4i64, Custom); | |||
1188 | // We need to mark SINT_TO_FP as Custom even though we want to expand it | |||
1189 | // so that DAG combine doesn't try to turn it into uint_to_fp. | |||
1190 | setOperationAction(ISD::SINT_TO_FP, MVT::v4i64, Custom); | |||
1191 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::v4i64, Custom); | |||
1192 | } | |||
1193 | } | |||
1194 | ||||
1195 | if (!Subtarget.useSoftFloat() && Subtarget.hasSSE42()) { | |||
1196 | setOperationAction(ISD::UADDSAT, MVT::v2i64, Custom); | |||
1197 | } | |||
1198 | ||||
1199 | if (!Subtarget.useSoftFloat() && Subtarget.hasXOP()) { | |||
1200 | for (auto VT : { MVT::v16i8, MVT::v8i16, MVT::v4i32, MVT::v2i64, | |||
1201 | MVT::v32i8, MVT::v16i16, MVT::v8i32, MVT::v4i64 }) | |||
1202 | setOperationAction(ISD::ROTL, VT, Custom); | |||
1203 | ||||
1204 | // XOP can efficiently perform BITREVERSE with VPPERM. | |||
1205 | for (auto VT : { MVT::i8, MVT::i16, MVT::i32, MVT::i64 }) | |||
1206 | setOperationAction(ISD::BITREVERSE, VT, Custom); | |||
1207 | ||||
1208 | for (auto VT : { MVT::v16i8, MVT::v8i16, MVT::v4i32, MVT::v2i64, | |||
1209 | MVT::v32i8, MVT::v16i16, MVT::v8i32, MVT::v4i64 }) | |||
1210 | setOperationAction(ISD::BITREVERSE, VT, Custom); | |||
1211 | } | |||
1212 | ||||
1213 | if (!Subtarget.useSoftFloat() && Subtarget.hasAVX()) { | |||
1214 | bool HasInt256 = Subtarget.hasInt256(); | |||
1215 | ||||
1216 | addRegisterClass(MVT::v32i8, Subtarget.hasVLX() ? &X86::VR256XRegClass | |||
1217 | : &X86::VR256RegClass); | |||
1218 | addRegisterClass(MVT::v16i16, Subtarget.hasVLX() ? &X86::VR256XRegClass | |||
1219 | : &X86::VR256RegClass); | |||
1220 | addRegisterClass(MVT::v8i32, Subtarget.hasVLX() ? &X86::VR256XRegClass | |||
1221 | : &X86::VR256RegClass); | |||
1222 | addRegisterClass(MVT::v8f32, Subtarget.hasVLX() ? &X86::VR256XRegClass | |||
1223 | : &X86::VR256RegClass); | |||
1224 | addRegisterClass(MVT::v4i64, Subtarget.hasVLX() ? &X86::VR256XRegClass | |||
1225 | : &X86::VR256RegClass); | |||
1226 | addRegisterClass(MVT::v4f64, Subtarget.hasVLX() ? &X86::VR256XRegClass | |||
1227 | : &X86::VR256RegClass); | |||
1228 | ||||
1229 | for (auto VT : { MVT::v8f32, MVT::v4f64 }) { | |||
1230 | setOperationAction(ISD::FFLOOR, VT, Legal); | |||
1231 | setOperationAction(ISD::STRICT_FFLOOR, VT, Legal); | |||
1232 | setOperationAction(ISD::FCEIL, VT, Legal); | |||
1233 | setOperationAction(ISD::STRICT_FCEIL, VT, Legal); | |||
1234 | setOperationAction(ISD::FTRUNC, VT, Legal); | |||
1235 | setOperationAction(ISD::STRICT_FTRUNC, VT, Legal); | |||
1236 | setOperationAction(ISD::FRINT, VT, Legal); | |||
1237 | setOperationAction(ISD::STRICT_FRINT, VT, Legal); | |||
1238 | setOperationAction(ISD::FNEARBYINT, VT, Legal); | |||
1239 | setOperationAction(ISD::STRICT_FNEARBYINT, VT, Legal); | |||
1240 | setOperationAction(ISD::FROUNDEVEN, VT, Legal); | |||
1241 | setOperationAction(ISD::STRICT_FROUNDEVEN, VT, Legal); | |||
1242 | ||||
1243 | setOperationAction(ISD::FROUND, VT, Custom); | |||
1244 | ||||
1245 | setOperationAction(ISD::FNEG, VT, Custom); | |||
1246 | setOperationAction(ISD::FABS, VT, Custom); | |||
1247 | setOperationAction(ISD::FCOPYSIGN, VT, Custom); | |||
1248 | } | |||
1249 | ||||
1250 | // (fp_to_int:v8i16 (v8f32 ..)) requires the result type to be promoted | |||
1251 | // even though v8i16 is a legal type. | |||
1252 | setOperationPromotedToType(ISD::FP_TO_SINT, MVT::v8i16, MVT::v8i32); | |||
1253 | setOperationPromotedToType(ISD::FP_TO_UINT, MVT::v8i16, MVT::v8i32); | |||
1254 | setOperationPromotedToType(ISD::STRICT_FP_TO_SINT, MVT::v8i16, MVT::v8i32); | |||
1255 | setOperationPromotedToType(ISD::STRICT_FP_TO_UINT, MVT::v8i16, MVT::v8i32); | |||
1256 | setOperationAction(ISD::FP_TO_SINT, MVT::v8i32, Legal); | |||
1257 | setOperationAction(ISD::FP_TO_UINT, MVT::v8i32, Custom); | |||
1258 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::v8i32, Legal); | |||
1259 | ||||
1260 | setOperationAction(ISD::SINT_TO_FP, MVT::v8i32, Legal); | |||
1261 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::v8i32, Legal); | |||
1262 | ||||
1263 | setOperationAction(ISD::STRICT_FP_ROUND, MVT::v4f32, Legal); | |||
1264 | setOperationAction(ISD::STRICT_FADD, MVT::v8f32, Legal); | |||
1265 | setOperationAction(ISD::STRICT_FADD, MVT::v4f64, Legal); | |||
1266 | setOperationAction(ISD::STRICT_FSUB, MVT::v8f32, Legal); | |||
1267 | setOperationAction(ISD::STRICT_FSUB, MVT::v4f64, Legal); | |||
1268 | setOperationAction(ISD::STRICT_FMUL, MVT::v8f32, Legal); | |||
1269 | setOperationAction(ISD::STRICT_FMUL, MVT::v4f64, Legal); | |||
1270 | setOperationAction(ISD::STRICT_FDIV, MVT::v8f32, Legal); | |||
1271 | setOperationAction(ISD::STRICT_FDIV, MVT::v4f64, Legal); | |||
1272 | setOperationAction(ISD::STRICT_FP_EXTEND, MVT::v4f64, Legal); | |||
1273 | setOperationAction(ISD::STRICT_FSQRT, MVT::v8f32, Legal); | |||
1274 | setOperationAction(ISD::STRICT_FSQRT, MVT::v4f64, Legal); | |||
1275 | ||||
1276 | if (!Subtarget.hasAVX512()) | |||
1277 | setOperationAction(ISD::BITCAST, MVT::v32i1, Custom); | |||
1278 | ||||
1279 | // In the customized shift lowering, the legal v8i32/v4i64 cases | |||
1280 | // in AVX2 will be recognized. | |||
1281 | for (auto VT : { MVT::v32i8, MVT::v16i16, MVT::v8i32, MVT::v4i64 }) { | |||
1282 | setOperationAction(ISD::SRL, VT, Custom); | |||
1283 | setOperationAction(ISD::SHL, VT, Custom); | |||
1284 | setOperationAction(ISD::SRA, VT, Custom); | |||
1285 | } | |||
1286 | ||||
1287 | // These types need custom splitting if their input is a 128-bit vector. | |||
1288 | setOperationAction(ISD::SIGN_EXTEND, MVT::v8i64, Custom); | |||
1289 | setOperationAction(ISD::SIGN_EXTEND, MVT::v16i32, Custom); | |||
1290 | setOperationAction(ISD::ZERO_EXTEND, MVT::v8i64, Custom); | |||
1291 | setOperationAction(ISD::ZERO_EXTEND, MVT::v16i32, Custom); | |||
1292 | ||||
1293 | setOperationAction(ISD::ROTL, MVT::v8i32, Custom); | |||
1294 | setOperationAction(ISD::ROTL, MVT::v16i16, Custom); | |||
1295 | ||||
1296 | // With BWI, expanding (and promoting the shifts) is the better. | |||
1297 | if (!Subtarget.useBWIRegs()) | |||
1298 | setOperationAction(ISD::ROTL, MVT::v32i8, Custom); | |||
1299 | ||||
1300 | setOperationAction(ISD::SELECT, MVT::v4f64, Custom); | |||
1301 | setOperationAction(ISD::SELECT, MVT::v4i64, Custom); | |||
1302 | setOperationAction(ISD::SELECT, MVT::v8i32, Custom); | |||
1303 | setOperationAction(ISD::SELECT, MVT::v16i16, Custom); | |||
1304 | setOperationAction(ISD::SELECT, MVT::v32i8, Custom); | |||
1305 | setOperationAction(ISD::SELECT, MVT::v8f32, Custom); | |||
1306 | ||||
1307 | for (auto VT : { MVT::v16i16, MVT::v8i32, MVT::v4i64 }) { | |||
1308 | setOperationAction(ISD::SIGN_EXTEND, VT, Custom); | |||
1309 | setOperationAction(ISD::ZERO_EXTEND, VT, Custom); | |||
1310 | setOperationAction(ISD::ANY_EXTEND, VT, Custom); | |||
1311 | } | |||
1312 | ||||
1313 | setOperationAction(ISD::TRUNCATE, MVT::v16i8, Custom); | |||
1314 | setOperationAction(ISD::TRUNCATE, MVT::v8i16, Custom); | |||
1315 | setOperationAction(ISD::TRUNCATE, MVT::v4i32, Custom); | |||
1316 | setOperationAction(ISD::BITREVERSE, MVT::v32i8, Custom); | |||
1317 | ||||
1318 | for (auto VT : { MVT::v32i8, MVT::v16i16, MVT::v8i32, MVT::v4i64 }) { | |||
1319 | setOperationAction(ISD::SETCC, VT, Custom); | |||
1320 | setOperationAction(ISD::STRICT_FSETCC, VT, Custom); | |||
1321 | setOperationAction(ISD::STRICT_FSETCCS, VT, Custom); | |||
1322 | setOperationAction(ISD::CTPOP, VT, Custom); | |||
1323 | setOperationAction(ISD::CTLZ, VT, Custom); | |||
1324 | ||||
1325 | // The condition codes aren't legal in SSE/AVX and under AVX512 we use | |||
1326 | // setcc all the way to isel and prefer SETGT in some isel patterns. | |||
1327 | setCondCodeAction(ISD::SETLT, VT, Custom); | |||
1328 | setCondCodeAction(ISD::SETLE, VT, Custom); | |||
1329 | } | |||
1330 | ||||
1331 | if (Subtarget.hasAnyFMA()) { | |||
1332 | for (auto VT : { MVT::f32, MVT::f64, MVT::v4f32, MVT::v8f32, | |||
1333 | MVT::v2f64, MVT::v4f64 }) { | |||
1334 | setOperationAction(ISD::FMA, VT, Legal); | |||
1335 | setOperationAction(ISD::STRICT_FMA, VT, Legal); | |||
1336 | } | |||
1337 | } | |||
1338 | ||||
1339 | for (auto VT : { MVT::v32i8, MVT::v16i16, MVT::v8i32, MVT::v4i64 }) { | |||
1340 | setOperationAction(ISD::ADD, VT, HasInt256 ? Legal : Custom); | |||
1341 | setOperationAction(ISD::SUB, VT, HasInt256 ? Legal : Custom); | |||
1342 | } | |||
1343 | ||||
1344 | setOperationAction(ISD::MUL, MVT::v4i64, Custom); | |||
1345 | setOperationAction(ISD::MUL, MVT::v8i32, HasInt256 ? Legal : Custom); | |||
1346 | setOperationAction(ISD::MUL, MVT::v16i16, HasInt256 ? Legal : Custom); | |||
1347 | setOperationAction(ISD::MUL, MVT::v32i8, Custom); | |||
1348 | ||||
1349 | setOperationAction(ISD::MULHU, MVT::v8i32, Custom); | |||
1350 | setOperationAction(ISD::MULHS, MVT::v8i32, Custom); | |||
1351 | setOperationAction(ISD::MULHU, MVT::v16i16, HasInt256 ? Legal : Custom); | |||
1352 | setOperationAction(ISD::MULHS, MVT::v16i16, HasInt256 ? Legal : Custom); | |||
1353 | setOperationAction(ISD::MULHU, MVT::v32i8, Custom); | |||
1354 | setOperationAction(ISD::MULHS, MVT::v32i8, Custom); | |||
1355 | ||||
1356 | setOperationAction(ISD::SMULO, MVT::v32i8, Custom); | |||
1357 | setOperationAction(ISD::UMULO, MVT::v32i8, Custom); | |||
1358 | ||||
1359 | setOperationAction(ISD::ABS, MVT::v4i64, Custom); | |||
1360 | setOperationAction(ISD::SMAX, MVT::v4i64, Custom); | |||
1361 | setOperationAction(ISD::UMAX, MVT::v4i64, Custom); | |||
1362 | setOperationAction(ISD::SMIN, MVT::v4i64, Custom); | |||
1363 | setOperationAction(ISD::UMIN, MVT::v4i64, Custom); | |||
1364 | ||||
1365 | setOperationAction(ISD::UADDSAT, MVT::v32i8, HasInt256 ? Legal : Custom); | |||
1366 | setOperationAction(ISD::SADDSAT, MVT::v32i8, HasInt256 ? Legal : Custom); | |||
1367 | setOperationAction(ISD::USUBSAT, MVT::v32i8, HasInt256 ? Legal : Custom); | |||
1368 | setOperationAction(ISD::SSUBSAT, MVT::v32i8, HasInt256 ? Legal : Custom); | |||
1369 | setOperationAction(ISD::UADDSAT, MVT::v16i16, HasInt256 ? Legal : Custom); | |||
1370 | setOperationAction(ISD::SADDSAT, MVT::v16i16, HasInt256 ? Legal : Custom); | |||
1371 | setOperationAction(ISD::USUBSAT, MVT::v16i16, HasInt256 ? Legal : Custom); | |||
1372 | setOperationAction(ISD::SSUBSAT, MVT::v16i16, HasInt256 ? Legal : Custom); | |||
1373 | setOperationAction(ISD::UADDSAT, MVT::v8i32, Custom); | |||
1374 | setOperationAction(ISD::USUBSAT, MVT::v8i32, Custom); | |||
1375 | setOperationAction(ISD::UADDSAT, MVT::v4i64, Custom); | |||
1376 | setOperationAction(ISD::USUBSAT, MVT::v4i64, Custom); | |||
1377 | ||||
1378 | for (auto VT : { MVT::v32i8, MVT::v16i16, MVT::v8i32 }) { | |||
1379 | setOperationAction(ISD::ABS, VT, HasInt256 ? Legal : Custom); | |||
1380 | setOperationAction(ISD::SMAX, VT, HasInt256 ? Legal : Custom); | |||
1381 | setOperationAction(ISD::UMAX, VT, HasInt256 ? Legal : Custom); | |||
1382 | setOperationAction(ISD::SMIN, VT, HasInt256 ? Legal : Custom); | |||
1383 | setOperationAction(ISD::UMIN, VT, HasInt256 ? Legal : Custom); | |||
1384 | } | |||
1385 | ||||
1386 | for (auto VT : {MVT::v16i16, MVT::v8i32, MVT::v4i64}) { | |||
1387 | setOperationAction(ISD::SIGN_EXTEND_VECTOR_INREG, VT, Custom); | |||
1388 | setOperationAction(ISD::ZERO_EXTEND_VECTOR_INREG, VT, Custom); | |||
1389 | } | |||
1390 | ||||
1391 | if (HasInt256) { | |||
1392 | // The custom lowering for UINT_TO_FP for v8i32 becomes interesting | |||
1393 | // when we have a 256bit-wide blend with immediate. | |||
1394 | setOperationAction(ISD::UINT_TO_FP, MVT::v8i32, Custom); | |||
1395 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v8i32, Custom); | |||
1396 | ||||
1397 | // AVX2 also has wider vector sign/zero extending loads, VPMOV[SZ]X | |||
1398 | for (auto LoadExtOp : { ISD::SEXTLOAD, ISD::ZEXTLOAD }) { | |||
1399 | setLoadExtAction(LoadExtOp, MVT::v16i16, MVT::v16i8, Legal); | |||
1400 | setLoadExtAction(LoadExtOp, MVT::v8i32, MVT::v8i8, Legal); | |||
1401 | setLoadExtAction(LoadExtOp, MVT::v4i64, MVT::v4i8, Legal); | |||
1402 | setLoadExtAction(LoadExtOp, MVT::v8i32, MVT::v8i16, Legal); | |||
1403 | setLoadExtAction(LoadExtOp, MVT::v4i64, MVT::v4i16, Legal); | |||
1404 | setLoadExtAction(LoadExtOp, MVT::v4i64, MVT::v4i32, Legal); | |||
1405 | } | |||
1406 | } | |||
1407 | ||||
1408 | for (auto VT : { MVT::v4i32, MVT::v8i32, MVT::v2i64, MVT::v4i64, | |||
1409 | MVT::v4f32, MVT::v8f32, MVT::v2f64, MVT::v4f64 }) { | |||
1410 | setOperationAction(ISD::MLOAD, VT, Subtarget.hasVLX() ? Legal : Custom); | |||
1411 | setOperationAction(ISD::MSTORE, VT, Legal); | |||
1412 | } | |||
1413 | ||||
1414 | // Extract subvector is special because the value type | |||
1415 | // (result) is 128-bit but the source is 256-bit wide. | |||
1416 | for (auto VT : { MVT::v16i8, MVT::v8i16, MVT::v4i32, MVT::v2i64, | |||
1417 | MVT::v4f32, MVT::v2f64 }) { | |||
1418 | setOperationAction(ISD::EXTRACT_SUBVECTOR, VT, Legal); | |||
1419 | } | |||
1420 | ||||
1421 | // Custom lower several nodes for 256-bit types. | |||
1422 | for (MVT VT : { MVT::v32i8, MVT::v16i16, MVT::v8i32, MVT::v4i64, | |||
1423 | MVT::v8f32, MVT::v4f64 }) { | |||
1424 | setOperationAction(ISD::BUILD_VECTOR, VT, Custom); | |||
1425 | setOperationAction(ISD::VECTOR_SHUFFLE, VT, Custom); | |||
1426 | setOperationAction(ISD::VSELECT, VT, Custom); | |||
1427 | setOperationAction(ISD::INSERT_VECTOR_ELT, VT, Custom); | |||
1428 | setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Custom); | |||
1429 | setOperationAction(ISD::SCALAR_TO_VECTOR, VT, Custom); | |||
1430 | setOperationAction(ISD::INSERT_SUBVECTOR, VT, Legal); | |||
1431 | setOperationAction(ISD::CONCAT_VECTORS, VT, Custom); | |||
1432 | setOperationAction(ISD::STORE, VT, Custom); | |||
1433 | } | |||
1434 | ||||
1435 | if (HasInt256) { | |||
1436 | setOperationAction(ISD::VSELECT, MVT::v32i8, Legal); | |||
1437 | ||||
1438 | // Custom legalize 2x32 to get a little better code. | |||
1439 | setOperationAction(ISD::MGATHER, MVT::v2f32, Custom); | |||
1440 | setOperationAction(ISD::MGATHER, MVT::v2i32, Custom); | |||
1441 | ||||
1442 | for (auto VT : { MVT::v4i32, MVT::v8i32, MVT::v2i64, MVT::v4i64, | |||
1443 | MVT::v4f32, MVT::v8f32, MVT::v2f64, MVT::v4f64 }) | |||
1444 | setOperationAction(ISD::MGATHER, VT, Custom); | |||
1445 | } | |||
1446 | } | |||
1447 | ||||
1448 | // This block controls legalization of the mask vector sizes that are | |||
1449 | // available with AVX512. 512-bit vectors are in a separate block controlled | |||
1450 | // by useAVX512Regs. | |||
1451 | if (!Subtarget.useSoftFloat() && Subtarget.hasAVX512()) { | |||
1452 | addRegisterClass(MVT::v1i1, &X86::VK1RegClass); | |||
1453 | addRegisterClass(MVT::v2i1, &X86::VK2RegClass); | |||
1454 | addRegisterClass(MVT::v4i1, &X86::VK4RegClass); | |||
1455 | addRegisterClass(MVT::v8i1, &X86::VK8RegClass); | |||
1456 | addRegisterClass(MVT::v16i1, &X86::VK16RegClass); | |||
1457 | ||||
1458 | setOperationAction(ISD::SELECT, MVT::v1i1, Custom); | |||
1459 | setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v1i1, Custom); | |||
1460 | setOperationAction(ISD::BUILD_VECTOR, MVT::v1i1, Custom); | |||
1461 | ||||
1462 | setOperationPromotedToType(ISD::FP_TO_SINT, MVT::v8i1, MVT::v8i32); | |||
1463 | setOperationPromotedToType(ISD::FP_TO_UINT, MVT::v8i1, MVT::v8i32); | |||
1464 | setOperationPromotedToType(ISD::FP_TO_SINT, MVT::v4i1, MVT::v4i32); | |||
1465 | setOperationPromotedToType(ISD::FP_TO_UINT, MVT::v4i1, MVT::v4i32); | |||
1466 | setOperationPromotedToType(ISD::STRICT_FP_TO_SINT, MVT::v8i1, MVT::v8i32); | |||
1467 | setOperationPromotedToType(ISD::STRICT_FP_TO_UINT, MVT::v8i1, MVT::v8i32); | |||
1468 | setOperationPromotedToType(ISD::STRICT_FP_TO_SINT, MVT::v4i1, MVT::v4i32); | |||
1469 | setOperationPromotedToType(ISD::STRICT_FP_TO_UINT, MVT::v4i1, MVT::v4i32); | |||
1470 | setOperationAction(ISD::FP_TO_SINT, MVT::v2i1, Custom); | |||
1471 | setOperationAction(ISD::FP_TO_UINT, MVT::v2i1, Custom); | |||
1472 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::v2i1, Custom); | |||
1473 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::v2i1, Custom); | |||
1474 | ||||
1475 | // There is no byte sized k-register load or store without AVX512DQ. | |||
1476 | if (!Subtarget.hasDQI()) { | |||
1477 | setOperationAction(ISD::LOAD, MVT::v1i1, Custom); | |||
1478 | setOperationAction(ISD::LOAD, MVT::v2i1, Custom); | |||
1479 | setOperationAction(ISD::LOAD, MVT::v4i1, Custom); | |||
1480 | setOperationAction(ISD::LOAD, MVT::v8i1, Custom); | |||
1481 | ||||
1482 | setOperationAction(ISD::STORE, MVT::v1i1, Custom); | |||
1483 | setOperationAction(ISD::STORE, MVT::v2i1, Custom); | |||
1484 | setOperationAction(ISD::STORE, MVT::v4i1, Custom); | |||
1485 | setOperationAction(ISD::STORE, MVT::v8i1, Custom); | |||
1486 | } | |||
1487 | ||||
1488 | // Extends of v16i1/v8i1/v4i1/v2i1 to 128-bit vectors. | |||
1489 | for (auto VT : { MVT::v16i8, MVT::v8i16, MVT::v4i32, MVT::v2i64 }) { | |||
1490 | setOperationAction(ISD::SIGN_EXTEND, VT, Custom); | |||
1491 | setOperationAction(ISD::ZERO_EXTEND, VT, Custom); | |||
1492 | setOperationAction(ISD::ANY_EXTEND, VT, Custom); | |||
1493 | } | |||
1494 | ||||
1495 | for (auto VT : { MVT::v1i1, MVT::v2i1, MVT::v4i1, MVT::v8i1, MVT::v16i1 }) | |||
1496 | setOperationAction(ISD::VSELECT, VT, Expand); | |||
1497 | ||||
1498 | for (auto VT : { MVT::v2i1, MVT::v4i1, MVT::v8i1, MVT::v16i1 }) { | |||
1499 | setOperationAction(ISD::SETCC, VT, Custom); | |||
1500 | setOperationAction(ISD::STRICT_FSETCC, VT, Custom); | |||
1501 | setOperationAction(ISD::STRICT_FSETCCS, VT, Custom); | |||
1502 | setOperationAction(ISD::SELECT, VT, Custom); | |||
1503 | setOperationAction(ISD::TRUNCATE, VT, Custom); | |||
1504 | ||||
1505 | setOperationAction(ISD::BUILD_VECTOR, VT, Custom); | |||
1506 | setOperationAction(ISD::CONCAT_VECTORS, VT, Custom); | |||
1507 | setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Custom); | |||
1508 | setOperationAction(ISD::INSERT_SUBVECTOR, VT, Custom); | |||
1509 | setOperationAction(ISD::INSERT_VECTOR_ELT, VT, Custom); | |||
1510 | setOperationAction(ISD::VECTOR_SHUFFLE, VT, Custom); | |||
1511 | } | |||
1512 | ||||
1513 | for (auto VT : { MVT::v1i1, MVT::v2i1, MVT::v4i1, MVT::v8i1 }) | |||
1514 | setOperationAction(ISD::EXTRACT_SUBVECTOR, VT, Custom); | |||
1515 | } | |||
1516 | ||||
1517 | // This block controls legalization for 512-bit operations with 32/64 bit | |||
1518 | // elements. 512-bits can be disabled based on prefer-vector-width and | |||
1519 | // required-vector-width function attributes. | |||
1520 | if (!Subtarget.useSoftFloat() && Subtarget.useAVX512Regs()) { | |||
1521 | bool HasBWI = Subtarget.hasBWI(); | |||
1522 | ||||
1523 | addRegisterClass(MVT::v16i32, &X86::VR512RegClass); | |||
1524 | addRegisterClass(MVT::v16f32, &X86::VR512RegClass); | |||
1525 | addRegisterClass(MVT::v8i64, &X86::VR512RegClass); | |||
1526 | addRegisterClass(MVT::v8f64, &X86::VR512RegClass); | |||
1527 | addRegisterClass(MVT::v32i16, &X86::VR512RegClass); | |||
1528 | addRegisterClass(MVT::v64i8, &X86::VR512RegClass); | |||
1529 | ||||
1530 | for (auto ExtType : {ISD::ZEXTLOAD, ISD::SEXTLOAD}) { | |||
1531 | setLoadExtAction(ExtType, MVT::v16i32, MVT::v16i8, Legal); | |||
1532 | setLoadExtAction(ExtType, MVT::v16i32, MVT::v16i16, Legal); | |||
1533 | setLoadExtAction(ExtType, MVT::v8i64, MVT::v8i8, Legal); | |||
1534 | setLoadExtAction(ExtType, MVT::v8i64, MVT::v8i16, Legal); | |||
1535 | setLoadExtAction(ExtType, MVT::v8i64, MVT::v8i32, Legal); | |||
1536 | if (HasBWI) | |||
1537 | setLoadExtAction(ExtType, MVT::v32i16, MVT::v32i8, Legal); | |||
1538 | } | |||
1539 | ||||
1540 | for (MVT VT : { MVT::v16f32, MVT::v8f64 }) { | |||
1541 | setOperationAction(ISD::FNEG, VT, Custom); | |||
1542 | setOperationAction(ISD::FABS, VT, Custom); | |||
1543 | setOperationAction(ISD::FMA, VT, Legal); | |||
1544 | setOperationAction(ISD::STRICT_FMA, VT, Legal); | |||
1545 | setOperationAction(ISD::FCOPYSIGN, VT, Custom); | |||
1546 | } | |||
1547 | ||||
1548 | for (MVT VT : { MVT::v16i1, MVT::v16i8, MVT::v16i16 }) { | |||
1549 | setOperationPromotedToType(ISD::FP_TO_SINT , VT, MVT::v16i32); | |||
1550 | setOperationPromotedToType(ISD::FP_TO_UINT , VT, MVT::v16i32); | |||
1551 | setOperationPromotedToType(ISD::STRICT_FP_TO_SINT, VT, MVT::v16i32); | |||
1552 | setOperationPromotedToType(ISD::STRICT_FP_TO_UINT, VT, MVT::v16i32); | |||
1553 | } | |||
1554 | setOperationAction(ISD::FP_TO_SINT, MVT::v16i32, Legal); | |||
1555 | setOperationAction(ISD::FP_TO_UINT, MVT::v16i32, Legal); | |||
1556 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::v16i32, Legal); | |||
1557 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::v16i32, Legal); | |||
1558 | setOperationAction(ISD::SINT_TO_FP, MVT::v16i32, Legal); | |||
1559 | setOperationAction(ISD::UINT_TO_FP, MVT::v16i32, Legal); | |||
1560 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::v16i32, Legal); | |||
1561 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v16i32, Legal); | |||
1562 | ||||
1563 | setOperationAction(ISD::STRICT_FADD, MVT::v16f32, Legal); | |||
1564 | setOperationAction(ISD::STRICT_FADD, MVT::v8f64, Legal); | |||
1565 | setOperationAction(ISD::STRICT_FSUB, MVT::v16f32, Legal); | |||
1566 | setOperationAction(ISD::STRICT_FSUB, MVT::v8f64, Legal); | |||
1567 | setOperationAction(ISD::STRICT_FMUL, MVT::v16f32, Legal); | |||
1568 | setOperationAction(ISD::STRICT_FMUL, MVT::v8f64, Legal); | |||
1569 | setOperationAction(ISD::STRICT_FDIV, MVT::v16f32, Legal); | |||
1570 | setOperationAction(ISD::STRICT_FDIV, MVT::v8f64, Legal); | |||
1571 | setOperationAction(ISD::STRICT_FSQRT, MVT::v16f32, Legal); | |||
1572 | setOperationAction(ISD::STRICT_FSQRT, MVT::v8f64, Legal); | |||
1573 | setOperationAction(ISD::STRICT_FP_EXTEND, MVT::v8f64, Legal); | |||
1574 | setOperationAction(ISD::STRICT_FP_ROUND, MVT::v8f32, Legal); | |||
1575 | ||||
1576 | setTruncStoreAction(MVT::v8i64, MVT::v8i8, Legal); | |||
1577 | setTruncStoreAction(MVT::v8i64, MVT::v8i16, Legal); | |||
1578 | setTruncStoreAction(MVT::v8i64, MVT::v8i32, Legal); | |||
1579 | setTruncStoreAction(MVT::v16i32, MVT::v16i8, Legal); | |||
1580 | setTruncStoreAction(MVT::v16i32, MVT::v16i16, Legal); | |||
1581 | if (HasBWI) | |||
1582 | setTruncStoreAction(MVT::v32i16, MVT::v32i8, Legal); | |||
1583 | ||||
1584 | // With 512-bit vectors and no VLX, we prefer to widen MLOAD/MSTORE | |||
1585 | // to 512-bit rather than use the AVX2 instructions so that we can use | |||
1586 | // k-masks. | |||
1587 | if (!Subtarget.hasVLX()) { | |||
1588 | for (auto VT : {MVT::v4i32, MVT::v8i32, MVT::v2i64, MVT::v4i64, | |||
1589 | MVT::v4f32, MVT::v8f32, MVT::v2f64, MVT::v4f64}) { | |||
1590 | setOperationAction(ISD::MLOAD, VT, Custom); | |||
1591 | setOperationAction(ISD::MSTORE, VT, Custom); | |||
1592 | } | |||
1593 | } | |||
1594 | ||||
1595 | setOperationAction(ISD::TRUNCATE, MVT::v8i32, Legal); | |||
1596 | setOperationAction(ISD::TRUNCATE, MVT::v16i16, Legal); | |||
1597 | setOperationAction(ISD::TRUNCATE, MVT::v32i8, HasBWI ? Legal : Custom); | |||
1598 | setOperationAction(ISD::TRUNCATE, MVT::v16i64, Custom); | |||
1599 | setOperationAction(ISD::ZERO_EXTEND, MVT::v32i16, Custom); | |||
1600 | setOperationAction(ISD::ZERO_EXTEND, MVT::v16i32, Custom); | |||
1601 | setOperationAction(ISD::ZERO_EXTEND, MVT::v8i64, Custom); | |||
1602 | setOperationAction(ISD::ANY_EXTEND, MVT::v32i16, Custom); | |||
1603 | setOperationAction(ISD::ANY_EXTEND, MVT::v16i32, Custom); | |||
1604 | setOperationAction(ISD::ANY_EXTEND, MVT::v8i64, Custom); | |||
1605 | setOperationAction(ISD::SIGN_EXTEND, MVT::v32i16, Custom); | |||
1606 | setOperationAction(ISD::SIGN_EXTEND, MVT::v16i32, Custom); | |||
1607 | setOperationAction(ISD::SIGN_EXTEND, MVT::v8i64, Custom); | |||
1608 | ||||
1609 | if (HasBWI) { | |||
1610 | // Extends from v64i1 masks to 512-bit vectors. | |||
1611 | setOperationAction(ISD::SIGN_EXTEND, MVT::v64i8, Custom); | |||
1612 | setOperationAction(ISD::ZERO_EXTEND, MVT::v64i8, Custom); | |||
1613 | setOperationAction(ISD::ANY_EXTEND, MVT::v64i8, Custom); | |||
1614 | } | |||
1615 | ||||
1616 | for (auto VT : { MVT::v16f32, MVT::v8f64 }) { | |||
1617 | setOperationAction(ISD::FFLOOR, VT, Legal); | |||
1618 | setOperationAction(ISD::STRICT_FFLOOR, VT, Legal); | |||
1619 | setOperationAction(ISD::FCEIL, VT, Legal); | |||
1620 | setOperationAction(ISD::STRICT_FCEIL, VT, Legal); | |||
1621 | setOperationAction(ISD::FTRUNC, VT, Legal); | |||
1622 | setOperationAction(ISD::STRICT_FTRUNC, VT, Legal); | |||
1623 | setOperationAction(ISD::FRINT, VT, Legal); | |||
1624 | setOperationAction(ISD::STRICT_FRINT, VT, Legal); | |||
1625 | setOperationAction(ISD::FNEARBYINT, VT, Legal); | |||
1626 | setOperationAction(ISD::STRICT_FNEARBYINT, VT, Legal); | |||
1627 | setOperationAction(ISD::FROUNDEVEN, VT, Legal); | |||
1628 | setOperationAction(ISD::STRICT_FROUNDEVEN, VT, Legal); | |||
1629 | ||||
1630 | setOperationAction(ISD::FROUND, VT, Custom); | |||
1631 | } | |||
1632 | ||||
1633 | for (auto VT : {MVT::v32i16, MVT::v16i32, MVT::v8i64}) { | |||
1634 | setOperationAction(ISD::SIGN_EXTEND_VECTOR_INREG, VT, Custom); | |||
1635 | setOperationAction(ISD::ZERO_EXTEND_VECTOR_INREG, VT, Custom); | |||
1636 | } | |||
1637 | ||||
1638 | setOperationAction(ISD::ADD, MVT::v32i16, HasBWI ? Legal : Custom); | |||
1639 | setOperationAction(ISD::SUB, MVT::v32i16, HasBWI ? Legal : Custom); | |||
1640 | setOperationAction(ISD::ADD, MVT::v64i8, HasBWI ? Legal : Custom); | |||
1641 | setOperationAction(ISD::SUB, MVT::v64i8, HasBWI ? Legal : Custom); | |||
1642 | ||||
1643 | setOperationAction(ISD::MUL, MVT::v8i64, Custom); | |||
1644 | setOperationAction(ISD::MUL, MVT::v16i32, Legal); | |||
1645 | setOperationAction(ISD::MUL, MVT::v32i16, HasBWI ? Legal : Custom); | |||
1646 | setOperationAction(ISD::MUL, MVT::v64i8, Custom); | |||
1647 | ||||
1648 | setOperationAction(ISD::MULHU, MVT::v16i32, Custom); | |||
1649 | setOperationAction(ISD::MULHS, MVT::v16i32, Custom); | |||
1650 | setOperationAction(ISD::MULHS, MVT::v32i16, HasBWI ? Legal : Custom); | |||
1651 | setOperationAction(ISD::MULHU, MVT::v32i16, HasBWI ? Legal : Custom); | |||
1652 | setOperationAction(ISD::MULHS, MVT::v64i8, Custom); | |||
1653 | setOperationAction(ISD::MULHU, MVT::v64i8, Custom); | |||
1654 | ||||
1655 | setOperationAction(ISD::SMULO, MVT::v64i8, Custom); | |||
1656 | setOperationAction(ISD::UMULO, MVT::v64i8, Custom); | |||
1657 | ||||
1658 | setOperationAction(ISD::BITREVERSE, MVT::v64i8, Custom); | |||
1659 | ||||
1660 | for (auto VT : { MVT::v64i8, MVT::v32i16, MVT::v16i32, MVT::v8i64 }) { | |||
1661 | setOperationAction(ISD::SRL, VT, Custom); | |||
1662 | setOperationAction(ISD::SHL, VT, Custom); | |||
1663 | setOperationAction(ISD::SRA, VT, Custom); | |||
1664 | setOperationAction(ISD::SETCC, VT, Custom); | |||
1665 | ||||
1666 | // The condition codes aren't legal in SSE/AVX and under AVX512 we use | |||
1667 | // setcc all the way to isel and prefer SETGT in some isel patterns. | |||
1668 | setCondCodeAction(ISD::SETLT, VT, Custom); | |||
1669 | setCondCodeAction(ISD::SETLE, VT, Custom); | |||
1670 | } | |||
1671 | for (auto VT : { MVT::v16i32, MVT::v8i64 }) { | |||
1672 | setOperationAction(ISD::SMAX, VT, Legal); | |||
1673 | setOperationAction(ISD::UMAX, VT, Legal); | |||
1674 | setOperationAction(ISD::SMIN, VT, Legal); | |||
1675 | setOperationAction(ISD::UMIN, VT, Legal); | |||
1676 | setOperationAction(ISD::ABS, VT, Legal); | |||
1677 | setOperationAction(ISD::CTPOP, VT, Custom); | |||
1678 | setOperationAction(ISD::ROTL, VT, Custom); | |||
1679 | setOperationAction(ISD::ROTR, VT, Custom); | |||
1680 | setOperationAction(ISD::STRICT_FSETCC, VT, Custom); | |||
1681 | setOperationAction(ISD::STRICT_FSETCCS, VT, Custom); | |||
1682 | } | |||
1683 | ||||
1684 | for (auto VT : { MVT::v64i8, MVT::v32i16 }) { | |||
1685 | setOperationAction(ISD::ABS, VT, HasBWI ? Legal : Custom); | |||
1686 | setOperationAction(ISD::CTPOP, VT, Subtarget.hasBITALG() ? Legal : Custom); | |||
1687 | setOperationAction(ISD::CTLZ, VT, Custom); | |||
1688 | setOperationAction(ISD::SMAX, VT, HasBWI ? Legal : Custom); | |||
1689 | setOperationAction(ISD::UMAX, VT, HasBWI ? Legal : Custom); | |||
1690 | setOperationAction(ISD::SMIN, VT, HasBWI ? Legal : Custom); | |||
1691 | setOperationAction(ISD::UMIN, VT, HasBWI ? Legal : Custom); | |||
1692 | setOperationAction(ISD::UADDSAT, VT, HasBWI ? Legal : Custom); | |||
1693 | setOperationAction(ISD::SADDSAT, VT, HasBWI ? Legal : Custom); | |||
1694 | setOperationAction(ISD::USUBSAT, VT, HasBWI ? Legal : Custom); | |||
1695 | setOperationAction(ISD::SSUBSAT, VT, HasBWI ? Legal : Custom); | |||
1696 | } | |||
1697 | ||||
1698 | if (Subtarget.hasDQI()) { | |||
1699 | setOperationAction(ISD::SINT_TO_FP, MVT::v8i64, Legal); | |||
1700 | setOperationAction(ISD::UINT_TO_FP, MVT::v8i64, Legal); | |||
1701 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::v8i64, Legal); | |||
1702 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v8i64, Legal); | |||
1703 | setOperationAction(ISD::FP_TO_SINT, MVT::v8i64, Legal); | |||
1704 | setOperationAction(ISD::FP_TO_UINT, MVT::v8i64, Legal); | |||
1705 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::v8i64, Legal); | |||
1706 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::v8i64, Legal); | |||
1707 | ||||
1708 | setOperationAction(ISD::MUL, MVT::v8i64, Legal); | |||
1709 | } | |||
1710 | ||||
1711 | if (Subtarget.hasCDI()) { | |||
1712 | // NonVLX sub-targets extend 128/256 vectors to use the 512 version. | |||
1713 | for (auto VT : { MVT::v16i32, MVT::v8i64} ) { | |||
1714 | setOperationAction(ISD::CTLZ, VT, Legal); | |||
1715 | } | |||
1716 | } // Subtarget.hasCDI() | |||
1717 | ||||
1718 | if (Subtarget.hasVPOPCNTDQ()) { | |||
1719 | for (auto VT : { MVT::v16i32, MVT::v8i64 }) | |||
1720 | setOperationAction(ISD::CTPOP, VT, Legal); | |||
1721 | } | |||
1722 | ||||
1723 | // Extract subvector is special because the value type | |||
1724 | // (result) is 256-bit but the source is 512-bit wide. | |||
1725 | // 128-bit was made Legal under AVX1. | |||
1726 | for (auto VT : { MVT::v32i8, MVT::v16i16, MVT::v8i32, MVT::v4i64, | |||
1727 | MVT::v8f32, MVT::v4f64 }) | |||
1728 | setOperationAction(ISD::EXTRACT_SUBVECTOR, VT, Legal); | |||
1729 | ||||
1730 | for (auto VT : { MVT::v64i8, MVT::v32i16, MVT::v16i32, MVT::v8i64, | |||
1731 | MVT::v16f32, MVT::v8f64 }) { | |||
1732 | setOperationAction(ISD::CONCAT_VECTORS, VT, Custom); | |||
1733 | setOperationAction(ISD::INSERT_SUBVECTOR, VT, Legal); | |||
1734 | setOperationAction(ISD::SELECT, VT, Custom); | |||
1735 | setOperationAction(ISD::VSELECT, VT, Custom); | |||
1736 | setOperationAction(ISD::BUILD_VECTOR, VT, Custom); | |||
1737 | setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Custom); | |||
1738 | setOperationAction(ISD::VECTOR_SHUFFLE, VT, Custom); | |||
1739 | setOperationAction(ISD::SCALAR_TO_VECTOR, VT, Custom); | |||
1740 | setOperationAction(ISD::INSERT_VECTOR_ELT, VT, Custom); | |||
1741 | } | |||
1742 | ||||
1743 | for (auto VT : { MVT::v16i32, MVT::v8i64, MVT::v16f32, MVT::v8f64 }) { | |||
1744 | setOperationAction(ISD::MLOAD, VT, Legal); | |||
1745 | setOperationAction(ISD::MSTORE, VT, Legal); | |||
1746 | setOperationAction(ISD::MGATHER, VT, Custom); | |||
1747 | setOperationAction(ISD::MSCATTER, VT, Custom); | |||
1748 | } | |||
1749 | if (HasBWI) { | |||
1750 | for (auto VT : { MVT::v64i8, MVT::v32i16 }) { | |||
1751 | setOperationAction(ISD::MLOAD, VT, Legal); | |||
1752 | setOperationAction(ISD::MSTORE, VT, Legal); | |||
1753 | } | |||
1754 | } else { | |||
1755 | setOperationAction(ISD::STORE, MVT::v32i16, Custom); | |||
1756 | setOperationAction(ISD::STORE, MVT::v64i8, Custom); | |||
1757 | } | |||
1758 | ||||
1759 | if (Subtarget.hasVBMI2()) { | |||
1760 | for (auto VT : { MVT::v8i16, MVT::v4i32, MVT::v2i64, | |||
1761 | MVT::v16i16, MVT::v8i32, MVT::v4i64, | |||
1762 | MVT::v32i16, MVT::v16i32, MVT::v8i64 }) { | |||
1763 | setOperationAction(ISD::FSHL, VT, Custom); | |||
1764 | setOperationAction(ISD::FSHR, VT, Custom); | |||
1765 | } | |||
1766 | ||||
1767 | setOperationAction(ISD::ROTL, MVT::v32i16, Custom); | |||
1768 | setOperationAction(ISD::ROTR, MVT::v8i16, Custom); | |||
1769 | setOperationAction(ISD::ROTR, MVT::v16i16, Custom); | |||
1770 | setOperationAction(ISD::ROTR, MVT::v32i16, Custom); | |||
1771 | } | |||
1772 | }// useAVX512Regs | |||
1773 | ||||
1774 | // This block controls legalization for operations that don't have | |||
1775 | // pre-AVX512 equivalents. Without VLX we use 512-bit operations for | |||
1776 | // narrower widths. | |||
1777 | if (!Subtarget.useSoftFloat() && Subtarget.hasAVX512()) { | |||
1778 | // These operations are handled on non-VLX by artificially widening in | |||
1779 | // isel patterns. | |||
1780 | ||||
1781 | setOperationAction(ISD::FP_TO_UINT, MVT::v8i32, | |||
1782 | Subtarget.hasVLX() ? Legal : Custom); | |||
1783 | setOperationAction(ISD::FP_TO_UINT, MVT::v4i32, | |||
1784 | Subtarget.hasVLX() ? Legal : Custom); | |||
1785 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::v8i32, | |||
1786 | Subtarget.hasVLX() ? Legal : Custom); | |||
1787 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::v4i32, | |||
1788 | Subtarget.hasVLX() ? Legal : Custom); | |||
1789 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::v2i32, Custom); | |||
1790 | setOperationAction(ISD::UINT_TO_FP, MVT::v8i32, | |||
1791 | Subtarget.hasVLX() ? Legal : Custom); | |||
1792 | setOperationAction(ISD::UINT_TO_FP, MVT::v4i32, | |||
1793 | Subtarget.hasVLX() ? Legal : Custom); | |||
1794 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v8i32, | |||
1795 | Subtarget.hasVLX() ? Legal : Custom); | |||
1796 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v4i32, | |||
1797 | Subtarget.hasVLX() ? Legal : Custom); | |||
1798 | ||||
1799 | if (Subtarget.hasDQI()) { | |||
1800 | // Fast v2f32 SINT_TO_FP( v2i64 ) custom conversion. | |||
1801 | // v2f32 UINT_TO_FP is already custom under SSE2. | |||
1802 | assert(isOperationCustom(ISD::UINT_TO_FP, MVT::v2f32) &&(static_cast <bool> (isOperationCustom(ISD::UINT_TO_FP, MVT::v2f32) && isOperationCustom(ISD::STRICT_UINT_TO_FP , MVT::v2f32) && "Unexpected operation action!") ? void (0) : __assert_fail ("isOperationCustom(ISD::UINT_TO_FP, MVT::v2f32) && isOperationCustom(ISD::STRICT_UINT_TO_FP, MVT::v2f32) && \"Unexpected operation action!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 1804, __extension__ __PRETTY_FUNCTION__)) | |||
1803 | isOperationCustom(ISD::STRICT_UINT_TO_FP, MVT::v2f32) &&(static_cast <bool> (isOperationCustom(ISD::UINT_TO_FP, MVT::v2f32) && isOperationCustom(ISD::STRICT_UINT_TO_FP , MVT::v2f32) && "Unexpected operation action!") ? void (0) : __assert_fail ("isOperationCustom(ISD::UINT_TO_FP, MVT::v2f32) && isOperationCustom(ISD::STRICT_UINT_TO_FP, MVT::v2f32) && \"Unexpected operation action!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 1804, __extension__ __PRETTY_FUNCTION__)) | |||
1804 | "Unexpected operation action!")(static_cast <bool> (isOperationCustom(ISD::UINT_TO_FP, MVT::v2f32) && isOperationCustom(ISD::STRICT_UINT_TO_FP , MVT::v2f32) && "Unexpected operation action!") ? void (0) : __assert_fail ("isOperationCustom(ISD::UINT_TO_FP, MVT::v2f32) && isOperationCustom(ISD::STRICT_UINT_TO_FP, MVT::v2f32) && \"Unexpected operation action!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 1804, __extension__ __PRETTY_FUNCTION__)); | |||
1805 | // v2i64 FP_TO_S/UINT(v2f32) custom conversion. | |||
1806 | setOperationAction(ISD::FP_TO_SINT, MVT::v2f32, Custom); | |||
1807 | setOperationAction(ISD::FP_TO_UINT, MVT::v2f32, Custom); | |||
1808 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::v2f32, Custom); | |||
1809 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::v2f32, Custom); | |||
1810 | } | |||
1811 | ||||
1812 | for (auto VT : { MVT::v2i64, MVT::v4i64 }) { | |||
1813 | setOperationAction(ISD::SMAX, VT, Legal); | |||
1814 | setOperationAction(ISD::UMAX, VT, Legal); | |||
1815 | setOperationAction(ISD::SMIN, VT, Legal); | |||
1816 | setOperationAction(ISD::UMIN, VT, Legal); | |||
1817 | setOperationAction(ISD::ABS, VT, Legal); | |||
1818 | } | |||
1819 | ||||
1820 | for (auto VT : { MVT::v4i32, MVT::v8i32, MVT::v2i64, MVT::v4i64 }) { | |||
1821 | setOperationAction(ISD::ROTL, VT, Custom); | |||
1822 | setOperationAction(ISD::ROTR, VT, Custom); | |||
1823 | } | |||
1824 | ||||
1825 | // Custom legalize 2x32 to get a little better code. | |||
1826 | setOperationAction(ISD::MSCATTER, MVT::v2f32, Custom); | |||
1827 | setOperationAction(ISD::MSCATTER, MVT::v2i32, Custom); | |||
1828 | ||||
1829 | for (auto VT : { MVT::v4i32, MVT::v8i32, MVT::v2i64, MVT::v4i64, | |||
1830 | MVT::v4f32, MVT::v8f32, MVT::v2f64, MVT::v4f64 }) | |||
1831 | setOperationAction(ISD::MSCATTER, VT, Custom); | |||
1832 | ||||
1833 | if (Subtarget.hasDQI()) { | |||
1834 | for (auto VT : { MVT::v2i64, MVT::v4i64 }) { | |||
1835 | setOperationAction(ISD::SINT_TO_FP, VT, | |||
1836 | Subtarget.hasVLX() ? Legal : Custom); | |||
1837 | setOperationAction(ISD::UINT_TO_FP, VT, | |||
1838 | Subtarget.hasVLX() ? Legal : Custom); | |||
1839 | setOperationAction(ISD::STRICT_SINT_TO_FP, VT, | |||
1840 | Subtarget.hasVLX() ? Legal : Custom); | |||
1841 | setOperationAction(ISD::STRICT_UINT_TO_FP, VT, | |||
1842 | Subtarget.hasVLX() ? Legal : Custom); | |||
1843 | setOperationAction(ISD::FP_TO_SINT, VT, | |||
1844 | Subtarget.hasVLX() ? Legal : Custom); | |||
1845 | setOperationAction(ISD::FP_TO_UINT, VT, | |||
1846 | Subtarget.hasVLX() ? Legal : Custom); | |||
1847 | setOperationAction(ISD::STRICT_FP_TO_SINT, VT, | |||
1848 | Subtarget.hasVLX() ? Legal : Custom); | |||
1849 | setOperationAction(ISD::STRICT_FP_TO_UINT, VT, | |||
1850 | Subtarget.hasVLX() ? Legal : Custom); | |||
1851 | setOperationAction(ISD::MUL, VT, Legal); | |||
1852 | } | |||
1853 | } | |||
1854 | ||||
1855 | if (Subtarget.hasCDI()) { | |||
1856 | for (auto VT : { MVT::v4i32, MVT::v8i32, MVT::v2i64, MVT::v4i64 }) { | |||
1857 | setOperationAction(ISD::CTLZ, VT, Legal); | |||
1858 | } | |||
1859 | } // Subtarget.hasCDI() | |||
1860 | ||||
1861 | if (Subtarget.hasVPOPCNTDQ()) { | |||
1862 | for (auto VT : { MVT::v4i32, MVT::v8i32, MVT::v2i64, MVT::v4i64 }) | |||
1863 | setOperationAction(ISD::CTPOP, VT, Legal); | |||
1864 | } | |||
1865 | } | |||
1866 | ||||
1867 | // This block control legalization of v32i1/v64i1 which are available with | |||
1868 | // AVX512BW. 512-bit v32i16 and v64i8 vector legalization is controlled with | |||
1869 | // useBWIRegs. | |||
1870 | if (!Subtarget.useSoftFloat() && Subtarget.hasBWI()) { | |||
1871 | addRegisterClass(MVT::v32i1, &X86::VK32RegClass); | |||
1872 | addRegisterClass(MVT::v64i1, &X86::VK64RegClass); | |||
1873 | ||||
1874 | for (auto VT : { MVT::v32i1, MVT::v64i1 }) { | |||
1875 | setOperationAction(ISD::VSELECT, VT, Expand); | |||
1876 | setOperationAction(ISD::TRUNCATE, VT, Custom); | |||
1877 | setOperationAction(ISD::SETCC, VT, Custom); | |||
1878 | setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Custom); | |||
1879 | setOperationAction(ISD::INSERT_VECTOR_ELT, VT, Custom); | |||
1880 | setOperationAction(ISD::SELECT, VT, Custom); | |||
1881 | setOperationAction(ISD::BUILD_VECTOR, VT, Custom); | |||
1882 | setOperationAction(ISD::VECTOR_SHUFFLE, VT, Custom); | |||
1883 | setOperationAction(ISD::CONCAT_VECTORS, VT, Custom); | |||
1884 | setOperationAction(ISD::INSERT_SUBVECTOR, VT, Custom); | |||
1885 | } | |||
1886 | ||||
1887 | for (auto VT : { MVT::v16i1, MVT::v32i1 }) | |||
1888 | setOperationAction(ISD::EXTRACT_SUBVECTOR, VT, Custom); | |||
1889 | ||||
1890 | // Extends from v32i1 masks to 256-bit vectors. | |||
1891 | setOperationAction(ISD::SIGN_EXTEND, MVT::v32i8, Custom); | |||
1892 | setOperationAction(ISD::ZERO_EXTEND, MVT::v32i8, Custom); | |||
1893 | setOperationAction(ISD::ANY_EXTEND, MVT::v32i8, Custom); | |||
1894 | ||||
1895 | for (auto VT : { MVT::v32i8, MVT::v16i8, MVT::v16i16, MVT::v8i16 }) { | |||
1896 | setOperationAction(ISD::MLOAD, VT, Subtarget.hasVLX() ? Legal : Custom); | |||
1897 | setOperationAction(ISD::MSTORE, VT, Subtarget.hasVLX() ? Legal : Custom); | |||
1898 | } | |||
1899 | ||||
1900 | // These operations are handled on non-VLX by artificially widening in | |||
1901 | // isel patterns. | |||
1902 | // TODO: Custom widen in lowering on non-VLX and drop the isel patterns? | |||
1903 | ||||
1904 | if (Subtarget.hasBITALG()) { | |||
1905 | for (auto VT : { MVT::v16i8, MVT::v32i8, MVT::v8i16, MVT::v16i16 }) | |||
1906 | setOperationAction(ISD::CTPOP, VT, Legal); | |||
1907 | } | |||
1908 | } | |||
1909 | ||||
1910 | if (!Subtarget.useSoftFloat() && Subtarget.hasFP16()) { | |||
1911 | auto setGroup = [&] (MVT VT) { | |||
1912 | setOperationAction(ISD::FADD, VT, Legal); | |||
1913 | setOperationAction(ISD::STRICT_FADD, VT, Legal); | |||
1914 | setOperationAction(ISD::FSUB, VT, Legal); | |||
1915 | setOperationAction(ISD::STRICT_FSUB, VT, Legal); | |||
1916 | setOperationAction(ISD::FMUL, VT, Legal); | |||
1917 | setOperationAction(ISD::STRICT_FMUL, VT, Legal); | |||
1918 | setOperationAction(ISD::FDIV, VT, Legal); | |||
1919 | setOperationAction(ISD::STRICT_FDIV, VT, Legal); | |||
1920 | setOperationAction(ISD::FSQRT, VT, Legal); | |||
1921 | setOperationAction(ISD::STRICT_FSQRT, VT, Legal); | |||
1922 | ||||
1923 | setOperationAction(ISD::FFLOOR, VT, Legal); | |||
1924 | setOperationAction(ISD::STRICT_FFLOOR, VT, Legal); | |||
1925 | setOperationAction(ISD::FCEIL, VT, Legal); | |||
1926 | setOperationAction(ISD::STRICT_FCEIL, VT, Legal); | |||
1927 | setOperationAction(ISD::FTRUNC, VT, Legal); | |||
1928 | setOperationAction(ISD::STRICT_FTRUNC, VT, Legal); | |||
1929 | setOperationAction(ISD::FRINT, VT, Legal); | |||
1930 | setOperationAction(ISD::STRICT_FRINT, VT, Legal); | |||
1931 | setOperationAction(ISD::FNEARBYINT, VT, Legal); | |||
1932 | setOperationAction(ISD::STRICT_FNEARBYINT, VT, Legal); | |||
1933 | ||||
1934 | setOperationAction(ISD::LOAD, VT, Legal); | |||
1935 | setOperationAction(ISD::STORE, VT, Legal); | |||
1936 | ||||
1937 | setOperationAction(ISD::FMA, VT, Legal); | |||
1938 | setOperationAction(ISD::STRICT_FMA, VT, Legal); | |||
1939 | setOperationAction(ISD::VSELECT, VT, Legal); | |||
1940 | setOperationAction(ISD::BUILD_VECTOR, VT, Custom); | |||
1941 | setOperationAction(ISD::SELECT, VT, Custom); | |||
1942 | ||||
1943 | setOperationAction(ISD::FNEG, VT, Custom); | |||
1944 | setOperationAction(ISD::FABS, VT, Custom); | |||
1945 | setOperationAction(ISD::FCOPYSIGN, VT, Custom); | |||
1946 | setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Custom); | |||
1947 | setOperationAction(ISD::VECTOR_SHUFFLE, VT, Custom); | |||
1948 | }; | |||
1949 | ||||
1950 | // AVX512_FP16 scalar operations | |||
1951 | setGroup(MVT::f16); | |||
1952 | addRegisterClass(MVT::f16, &X86::FR16XRegClass); | |||
1953 | setOperationAction(ISD::SELECT_CC, MVT::f16, Expand); | |||
1954 | setOperationAction(ISD::BR_CC, MVT::f16, Expand); | |||
1955 | setOperationAction(ISD::SETCC, MVT::f16, Custom); | |||
1956 | setOperationAction(ISD::STRICT_FSETCC, MVT::f16, Custom); | |||
1957 | setOperationAction(ISD::STRICT_FSETCCS, MVT::f16, Custom); | |||
1958 | setOperationAction(ISD::FP_ROUND, MVT::f16, Custom); | |||
1959 | setOperationAction(ISD::STRICT_FP_ROUND, MVT::f16, Custom); | |||
1960 | setOperationAction(ISD::STRICT_FP_EXTEND, MVT::f32, Legal); | |||
1961 | if (isTypeLegal(MVT::f80)) { | |||
1962 | setOperationAction(ISD::FP_EXTEND, MVT::f80, Custom); | |||
1963 | setOperationAction(ISD::STRICT_FP_EXTEND, MVT::f80, Custom); | |||
1964 | } | |||
1965 | ||||
1966 | setCondCodeAction(ISD::SETOEQ, MVT::f16, Expand); | |||
1967 | setCondCodeAction(ISD::SETUNE, MVT::f16, Expand); | |||
1968 | ||||
1969 | if (Subtarget.useAVX512Regs()) { | |||
1970 | setGroup(MVT::v32f16); | |||
1971 | addRegisterClass(MVT::v32f16, &X86::VR512RegClass); | |||
1972 | setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v32f16, Custom); | |||
1973 | setOperationAction(ISD::SINT_TO_FP, MVT::v32i16, Legal); | |||
1974 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::v32i16, Legal); | |||
1975 | setOperationAction(ISD::UINT_TO_FP, MVT::v32i16, Legal); | |||
1976 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v32i16, Legal); | |||
1977 | setOperationAction(ISD::STRICT_FP_ROUND, MVT::v16f16, Legal); | |||
1978 | setOperationAction(ISD::STRICT_FP_EXTEND, MVT::v16f32, Legal); | |||
1979 | setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v32f16, Custom); | |||
1980 | ||||
1981 | setOperationAction(ISD::FP_TO_SINT, MVT::v32i16, Custom); | |||
1982 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::v32i16, Custom); | |||
1983 | setOperationAction(ISD::FP_TO_UINT, MVT::v32i16, Custom); | |||
1984 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::v32i16, Custom); | |||
1985 | setOperationPromotedToType(ISD::FP_TO_SINT, MVT::v32i8, MVT::v32i16); | |||
1986 | setOperationPromotedToType(ISD::STRICT_FP_TO_SINT, MVT::v32i8, | |||
1987 | MVT::v32i16); | |||
1988 | setOperationPromotedToType(ISD::FP_TO_UINT, MVT::v32i8, MVT::v32i16); | |||
1989 | setOperationPromotedToType(ISD::STRICT_FP_TO_UINT, MVT::v32i8, | |||
1990 | MVT::v32i16); | |||
1991 | setOperationPromotedToType(ISD::FP_TO_SINT, MVT::v32i1, MVT::v32i16); | |||
1992 | setOperationPromotedToType(ISD::STRICT_FP_TO_SINT, MVT::v32i1, | |||
1993 | MVT::v32i16); | |||
1994 | setOperationPromotedToType(ISD::FP_TO_UINT, MVT::v32i1, MVT::v32i16); | |||
1995 | setOperationPromotedToType(ISD::STRICT_FP_TO_UINT, MVT::v32i1, | |||
1996 | MVT::v32i16); | |||
1997 | ||||
1998 | setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v16f16, Legal); | |||
1999 | setOperationAction(ISD::INSERT_SUBVECTOR, MVT::v32f16, Legal); | |||
2000 | setOperationAction(ISD::CONCAT_VECTORS, MVT::v32f16, Custom); | |||
2001 | ||||
2002 | setLoadExtAction(ISD::EXTLOAD, MVT::v8f64, MVT::v8f16, Legal); | |||
2003 | setLoadExtAction(ISD::EXTLOAD, MVT::v16f32, MVT::v16f16, Legal); | |||
2004 | ||||
2005 | setOperationAction(ISD::STRICT_FSETCC, MVT::v32i1, Custom); | |||
2006 | setOperationAction(ISD::STRICT_FSETCCS, MVT::v32i1, Custom); | |||
2007 | } | |||
2008 | ||||
2009 | if (Subtarget.hasVLX()) { | |||
2010 | addRegisterClass(MVT::v8f16, &X86::VR128XRegClass); | |||
2011 | addRegisterClass(MVT::v16f16, &X86::VR256XRegClass); | |||
2012 | setGroup(MVT::v8f16); | |||
2013 | setGroup(MVT::v16f16); | |||
2014 | ||||
2015 | setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v8f16, Legal); | |||
2016 | setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v16f16, Custom); | |||
2017 | setOperationAction(ISD::SINT_TO_FP, MVT::v16i16, Legal); | |||
2018 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::v16i16, Legal); | |||
2019 | setOperationAction(ISD::SINT_TO_FP, MVT::v8i16, Legal); | |||
2020 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::v8i16, Legal); | |||
2021 | setOperationAction(ISD::UINT_TO_FP, MVT::v16i16, Legal); | |||
2022 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v16i16, Legal); | |||
2023 | setOperationAction(ISD::UINT_TO_FP, MVT::v8i16, Legal); | |||
2024 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v8i16, Legal); | |||
2025 | ||||
2026 | setOperationAction(ISD::FP_TO_SINT, MVT::v8i16, Custom); | |||
2027 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::v8i16, Custom); | |||
2028 | setOperationAction(ISD::FP_TO_UINT, MVT::v8i16, Custom); | |||
2029 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::v8i16, Custom); | |||
2030 | setOperationAction(ISD::STRICT_FP_ROUND, MVT::v8f16, Legal); | |||
2031 | setOperationAction(ISD::STRICT_FP_EXTEND, MVT::v8f32, Legal); | |||
2032 | ||||
2033 | // INSERT_VECTOR_ELT v8f16 extended to VECTOR_SHUFFLE | |||
2034 | setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8f16, Custom); | |||
2035 | setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v16f16, Custom); | |||
2036 | ||||
2037 | setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v8f16, Legal); | |||
2038 | setOperationAction(ISD::INSERT_SUBVECTOR, MVT::v16f16, Legal); | |||
2039 | setOperationAction(ISD::CONCAT_VECTORS, MVT::v16f16, Custom); | |||
2040 | ||||
2041 | setLoadExtAction(ISD::EXTLOAD, MVT::v4f64, MVT::v4f16, Legal); | |||
2042 | setLoadExtAction(ISD::EXTLOAD, MVT::v2f64, MVT::v2f16, Legal); | |||
2043 | setLoadExtAction(ISD::EXTLOAD, MVT::v8f32, MVT::v8f16, Legal); | |||
2044 | setLoadExtAction(ISD::EXTLOAD, MVT::v4f32, MVT::v4f16, Legal); | |||
2045 | ||||
2046 | // Need to custom widen these to prevent scalarization. | |||
2047 | setOperationAction(ISD::LOAD, MVT::v4f16, Custom); | |||
2048 | setOperationAction(ISD::STORE, MVT::v4f16, Custom); | |||
2049 | } | |||
2050 | ||||
2051 | // Support fp16 0 immediate | |||
2052 | addLegalFPImmediate(APFloat::getZero(APFloat::IEEEhalf())); | |||
2053 | } | |||
2054 | ||||
2055 | if (!Subtarget.useSoftFloat() && Subtarget.hasVLX()) { | |||
2056 | setTruncStoreAction(MVT::v4i64, MVT::v4i8, Legal); | |||
2057 | setTruncStoreAction(MVT::v4i64, MVT::v4i16, Legal); | |||
2058 | setTruncStoreAction(MVT::v4i64, MVT::v4i32, Legal); | |||
2059 | setTruncStoreAction(MVT::v8i32, MVT::v8i8, Legal); | |||
2060 | setTruncStoreAction(MVT::v8i32, MVT::v8i16, Legal); | |||
2061 | ||||
2062 | setTruncStoreAction(MVT::v2i64, MVT::v2i8, Legal); | |||
2063 | setTruncStoreAction(MVT::v2i64, MVT::v2i16, Legal); | |||
2064 | setTruncStoreAction(MVT::v2i64, MVT::v2i32, Legal); | |||
2065 | setTruncStoreAction(MVT::v4i32, MVT::v4i8, Legal); | |||
2066 | setTruncStoreAction(MVT::v4i32, MVT::v4i16, Legal); | |||
2067 | ||||
2068 | if (Subtarget.hasBWI()) { | |||
2069 | setTruncStoreAction(MVT::v16i16, MVT::v16i8, Legal); | |||
2070 | setTruncStoreAction(MVT::v8i16, MVT::v8i8, Legal); | |||
2071 | } | |||
2072 | ||||
2073 | if (Subtarget.hasFP16()) { | |||
2074 | // vcvttph2[u]dq v4f16 -> v4i32/64, v2f16 -> v2i32/64 | |||
2075 | setOperationAction(ISD::FP_TO_SINT, MVT::v2f16, Custom); | |||
2076 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::v2f16, Custom); | |||
2077 | setOperationAction(ISD::FP_TO_UINT, MVT::v2f16, Custom); | |||
2078 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::v2f16, Custom); | |||
2079 | setOperationAction(ISD::FP_TO_SINT, MVT::v4f16, Custom); | |||
2080 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::v4f16, Custom); | |||
2081 | setOperationAction(ISD::FP_TO_UINT, MVT::v4f16, Custom); | |||
2082 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::v4f16, Custom); | |||
2083 | // vcvt[u]dq2ph v4i32/64 -> v4f16, v2i32/64 -> v2f16 | |||
2084 | setOperationAction(ISD::SINT_TO_FP, MVT::v2f16, Custom); | |||
2085 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::v2f16, Custom); | |||
2086 | setOperationAction(ISD::UINT_TO_FP, MVT::v2f16, Custom); | |||
2087 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v2f16, Custom); | |||
2088 | setOperationAction(ISD::SINT_TO_FP, MVT::v4f16, Custom); | |||
2089 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::v4f16, Custom); | |||
2090 | setOperationAction(ISD::UINT_TO_FP, MVT::v4f16, Custom); | |||
2091 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v4f16, Custom); | |||
2092 | // vcvtps2phx v4f32 -> v4f16, v2f32 -> v2f16 | |||
2093 | setOperationAction(ISD::FP_ROUND, MVT::v2f16, Custom); | |||
2094 | setOperationAction(ISD::STRICT_FP_ROUND, MVT::v2f16, Custom); | |||
2095 | setOperationAction(ISD::FP_ROUND, MVT::v4f16, Custom); | |||
2096 | setOperationAction(ISD::STRICT_FP_ROUND, MVT::v4f16, Custom); | |||
2097 | // vcvtph2psx v4f16 -> v4f32, v2f16 -> v2f32 | |||
2098 | setOperationAction(ISD::FP_EXTEND, MVT::v2f16, Custom); | |||
2099 | setOperationAction(ISD::STRICT_FP_EXTEND, MVT::v2f16, Custom); | |||
2100 | setOperationAction(ISD::FP_EXTEND, MVT::v4f16, Custom); | |||
2101 | setOperationAction(ISD::STRICT_FP_EXTEND, MVT::v4f16, Custom); | |||
2102 | } | |||
2103 | ||||
2104 | setOperationAction(ISD::TRUNCATE, MVT::v16i32, Custom); | |||
2105 | setOperationAction(ISD::TRUNCATE, MVT::v8i64, Custom); | |||
2106 | setOperationAction(ISD::TRUNCATE, MVT::v16i64, Custom); | |||
2107 | } | |||
2108 | ||||
2109 | if (Subtarget.hasAMXTILE()) { | |||
2110 | addRegisterClass(MVT::x86amx, &X86::TILERegClass); | |||
2111 | } | |||
2112 | ||||
2113 | // We want to custom lower some of our intrinsics. | |||
2114 | setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom); | |||
2115 | setOperationAction(ISD::INTRINSIC_W_CHAIN, MVT::Other, Custom); | |||
2116 | setOperationAction(ISD::INTRINSIC_VOID, MVT::Other, Custom); | |||
2117 | if (!Subtarget.is64Bit()) { | |||
2118 | setOperationAction(ISD::INTRINSIC_W_CHAIN, MVT::i64, Custom); | |||
2119 | } | |||
2120 | ||||
2121 | // Only custom-lower 64-bit SADDO and friends on 64-bit because we don't | |||
2122 | // handle type legalization for these operations here. | |||
2123 | // | |||
2124 | // FIXME: We really should do custom legalization for addition and | |||
2125 | // subtraction on x86-32 once PR3203 is fixed. We really can't do much better | |||
2126 | // than generic legalization for 64-bit multiplication-with-overflow, though. | |||
2127 | for (auto VT : { MVT::i8, MVT::i16, MVT::i32, MVT::i64 }) { | |||
2128 | if (VT == MVT::i64 && !Subtarget.is64Bit()) | |||
2129 | continue; | |||
2130 | // Add/Sub/Mul with overflow operations are custom lowered. | |||
2131 | setOperationAction(ISD::SADDO, VT, Custom); | |||
2132 | setOperationAction(ISD::UADDO, VT, Custom); | |||
2133 | setOperationAction(ISD::SSUBO, VT, Custom); | |||
2134 | setOperationAction(ISD::USUBO, VT, Custom); | |||
2135 | setOperationAction(ISD::SMULO, VT, Custom); | |||
2136 | setOperationAction(ISD::UMULO, VT, Custom); | |||
2137 | ||||
2138 | // Support carry in as value rather than glue. | |||
2139 | setOperationAction(ISD::ADDCARRY, VT, Custom); | |||
2140 | setOperationAction(ISD::SUBCARRY, VT, Custom); | |||
2141 | setOperationAction(ISD::SETCCCARRY, VT, Custom); | |||
2142 | setOperationAction(ISD::SADDO_CARRY, VT, Custom); | |||
2143 | setOperationAction(ISD::SSUBO_CARRY, VT, Custom); | |||
2144 | } | |||
2145 | ||||
2146 | if (!Subtarget.is64Bit()) { | |||
2147 | // These libcalls are not available in 32-bit. | |||
2148 | setLibcallName(RTLIB::SHL_I128, nullptr); | |||
2149 | setLibcallName(RTLIB::SRL_I128, nullptr); | |||
2150 | setLibcallName(RTLIB::SRA_I128, nullptr); | |||
2151 | setLibcallName(RTLIB::MUL_I128, nullptr); | |||
2152 | setLibcallName(RTLIB::MULO_I128, nullptr); | |||
2153 | } | |||
2154 | ||||
2155 | // Combine sin / cos into _sincos_stret if it is available. | |||
2156 | if (getLibcallName(RTLIB::SINCOS_STRET_F32) != nullptr && | |||
2157 | getLibcallName(RTLIB::SINCOS_STRET_F64) != nullptr) { | |||
2158 | setOperationAction(ISD::FSINCOS, MVT::f64, Custom); | |||
2159 | setOperationAction(ISD::FSINCOS, MVT::f32, Custom); | |||
2160 | } | |||
2161 | ||||
2162 | if (Subtarget.isTargetWin64()) { | |||
2163 | setOperationAction(ISD::SDIV, MVT::i128, Custom); | |||
2164 | setOperationAction(ISD::UDIV, MVT::i128, Custom); | |||
2165 | setOperationAction(ISD::SREM, MVT::i128, Custom); | |||
2166 | setOperationAction(ISD::UREM, MVT::i128, Custom); | |||
2167 | } | |||
2168 | ||||
2169 | // On 32 bit MSVC, `fmodf(f32)` is not defined - only `fmod(f64)` | |||
2170 | // is. We should promote the value to 64-bits to solve this. | |||
2171 | // This is what the CRT headers do - `fmodf` is an inline header | |||
2172 | // function casting to f64 and calling `fmod`. | |||
2173 | if (Subtarget.is32Bit() && | |||
2174 | (Subtarget.isTargetWindowsMSVC() || Subtarget.isTargetWindowsItanium())) | |||
2175 | for (ISD::NodeType Op : | |||
2176 | {ISD::FCEIL, ISD::STRICT_FCEIL, | |||
2177 | ISD::FCOS, ISD::STRICT_FCOS, | |||
2178 | ISD::FEXP, ISD::STRICT_FEXP, | |||
2179 | ISD::FFLOOR, ISD::STRICT_FFLOOR, | |||
2180 | ISD::FREM, ISD::STRICT_FREM, | |||
2181 | ISD::FLOG, ISD::STRICT_FLOG, | |||
2182 | ISD::FLOG10, ISD::STRICT_FLOG10, | |||
2183 | ISD::FPOW, ISD::STRICT_FPOW, | |||
2184 | ISD::FSIN, ISD::STRICT_FSIN}) | |||
2185 | if (isOperationExpand(Op, MVT::f32)) | |||
2186 | setOperationAction(Op, MVT::f32, Promote); | |||
2187 | ||||
2188 | // We have target-specific dag combine patterns for the following nodes: | |||
2189 | setTargetDAGCombine(ISD::VECTOR_SHUFFLE); | |||
2190 | setTargetDAGCombine(ISD::SCALAR_TO_VECTOR); | |||
2191 | setTargetDAGCombine(ISD::INSERT_VECTOR_ELT); | |||
2192 | setTargetDAGCombine(ISD::EXTRACT_VECTOR_ELT); | |||
2193 | setTargetDAGCombine(ISD::CONCAT_VECTORS); | |||
2194 | setTargetDAGCombine(ISD::INSERT_SUBVECTOR); | |||
2195 | setTargetDAGCombine(ISD::EXTRACT_SUBVECTOR); | |||
2196 | setTargetDAGCombine(ISD::BITCAST); | |||
2197 | setTargetDAGCombine(ISD::VSELECT); | |||
2198 | setTargetDAGCombine(ISD::SELECT); | |||
2199 | setTargetDAGCombine(ISD::SHL); | |||
2200 | setTargetDAGCombine(ISD::SRA); | |||
2201 | setTargetDAGCombine(ISD::SRL); | |||
2202 | setTargetDAGCombine(ISD::OR); | |||
2203 | setTargetDAGCombine(ISD::AND); | |||
2204 | setTargetDAGCombine(ISD::ADD); | |||
2205 | setTargetDAGCombine(ISD::FADD); | |||
2206 | setTargetDAGCombine(ISD::FSUB); | |||
2207 | setTargetDAGCombine(ISD::FNEG); | |||
2208 | setTargetDAGCombine(ISD::FMA); | |||
2209 | setTargetDAGCombine(ISD::STRICT_FMA); | |||
2210 | setTargetDAGCombine(ISD::FMINNUM); | |||
2211 | setTargetDAGCombine(ISD::FMAXNUM); | |||
2212 | setTargetDAGCombine(ISD::SUB); | |||
2213 | setTargetDAGCombine(ISD::LOAD); | |||
2214 | setTargetDAGCombine(ISD::MLOAD); | |||
2215 | setTargetDAGCombine(ISD::STORE); | |||
2216 | setTargetDAGCombine(ISD::MSTORE); | |||
2217 | setTargetDAGCombine(ISD::TRUNCATE); | |||
2218 | setTargetDAGCombine(ISD::ZERO_EXTEND); | |||
2219 | setTargetDAGCombine(ISD::ANY_EXTEND); | |||
2220 | setTargetDAGCombine(ISD::SIGN_EXTEND); | |||
2221 | setTargetDAGCombine(ISD::SIGN_EXTEND_INREG); | |||
2222 | setTargetDAGCombine(ISD::ANY_EXTEND_VECTOR_INREG); | |||
2223 | setTargetDAGCombine(ISD::SIGN_EXTEND_VECTOR_INREG); | |||
2224 | setTargetDAGCombine(ISD::ZERO_EXTEND_VECTOR_INREG); | |||
2225 | setTargetDAGCombine(ISD::SINT_TO_FP); | |||
2226 | setTargetDAGCombine(ISD::UINT_TO_FP); | |||
2227 | setTargetDAGCombine(ISD::STRICT_SINT_TO_FP); | |||
2228 | setTargetDAGCombine(ISD::STRICT_UINT_TO_FP); | |||
2229 | setTargetDAGCombine(ISD::SETCC); | |||
2230 | setTargetDAGCombine(ISD::MUL); | |||
2231 | setTargetDAGCombine(ISD::XOR); | |||
2232 | setTargetDAGCombine(ISD::MSCATTER); | |||
2233 | setTargetDAGCombine(ISD::MGATHER); | |||
2234 | setTargetDAGCombine(ISD::FP16_TO_FP); | |||
2235 | setTargetDAGCombine(ISD::FP_EXTEND); | |||
2236 | setTargetDAGCombine(ISD::STRICT_FP_EXTEND); | |||
2237 | setTargetDAGCombine(ISD::FP_ROUND); | |||
2238 | ||||
2239 | computeRegisterProperties(Subtarget.getRegisterInfo()); | |||
2240 | ||||
2241 | MaxStoresPerMemset = 16; // For @llvm.memset -> sequence of stores | |||
2242 | MaxStoresPerMemsetOptSize = 8; | |||
2243 | MaxStoresPerMemcpy = 8; // For @llvm.memcpy -> sequence of stores | |||
2244 | MaxStoresPerMemcpyOptSize = 4; | |||
2245 | MaxStoresPerMemmove = 8; // For @llvm.memmove -> sequence of stores | |||
2246 | MaxStoresPerMemmoveOptSize = 4; | |||
2247 | ||||
2248 | // TODO: These control memcmp expansion in CGP and could be raised higher, but | |||
2249 | // that needs to benchmarked and balanced with the potential use of vector | |||
2250 | // load/store types (PR33329, PR33914). | |||
2251 | MaxLoadsPerMemcmp = 2; | |||
2252 | MaxLoadsPerMemcmpOptSize = 2; | |||
2253 | ||||
2254 | // Default loop alignment, which can be overridden by -align-loops. | |||
2255 | setPrefLoopAlignment(Align(16)); | |||
2256 | ||||
2257 | // An out-of-order CPU can speculatively execute past a predictable branch, | |||
2258 | // but a conditional move could be stalled by an expensive earlier operation. | |||
2259 | PredictableSelectIsExpensive = Subtarget.getSchedModel().isOutOfOrder(); | |||
2260 | EnableExtLdPromotion = true; | |||
2261 | setPrefFunctionAlignment(Align(16)); | |||
2262 | ||||
2263 | verifyIntrinsicTables(); | |||
2264 | ||||
2265 | // Default to having -disable-strictnode-mutation on | |||
2266 | IsStrictFPEnabled = true; | |||
2267 | } | |||
2268 | ||||
2269 | // This has so far only been implemented for 64-bit MachO. | |||
2270 | bool X86TargetLowering::useLoadStackGuardNode() const { | |||
2271 | return Subtarget.isTargetMachO() && Subtarget.is64Bit(); | |||
2272 | } | |||
2273 | ||||
2274 | bool X86TargetLowering::useStackGuardXorFP() const { | |||
2275 | // Currently only MSVC CRTs XOR the frame pointer into the stack guard value. | |||
2276 | return Subtarget.getTargetTriple().isOSMSVCRT() && !Subtarget.isTargetMachO(); | |||
2277 | } | |||
2278 | ||||
2279 | SDValue X86TargetLowering::emitStackGuardXorFP(SelectionDAG &DAG, SDValue Val, | |||
2280 | const SDLoc &DL) const { | |||
2281 | EVT PtrTy = getPointerTy(DAG.getDataLayout()); | |||
2282 | unsigned XorOp = Subtarget.is64Bit() ? X86::XOR64_FP : X86::XOR32_FP; | |||
2283 | MachineSDNode *Node = DAG.getMachineNode(XorOp, DL, PtrTy, Val); | |||
2284 | return SDValue(Node, 0); | |||
2285 | } | |||
2286 | ||||
2287 | TargetLoweringBase::LegalizeTypeAction | |||
2288 | X86TargetLowering::getPreferredVectorAction(MVT VT) const { | |||
2289 | if ((VT == MVT::v32i1 || VT == MVT::v64i1) && Subtarget.hasAVX512() && | |||
2290 | !Subtarget.hasBWI()) | |||
2291 | return TypeSplitVector; | |||
2292 | ||||
2293 | if (!VT.isScalableVector() && VT.getVectorNumElements() != 1 && | |||
2294 | VT.getVectorElementType() != MVT::i1) | |||
2295 | return TypeWidenVector; | |||
2296 | ||||
2297 | return TargetLoweringBase::getPreferredVectorAction(VT); | |||
2298 | } | |||
2299 | ||||
2300 | static std::pair<MVT, unsigned> | |||
2301 | handleMaskRegisterForCallingConv(unsigned NumElts, CallingConv::ID CC, | |||
2302 | const X86Subtarget &Subtarget) { | |||
2303 | // v2i1/v4i1/v8i1/v16i1 all pass in xmm registers unless the calling | |||
2304 | // convention is one that uses k registers. | |||
2305 | if (NumElts == 2) | |||
2306 | return {MVT::v2i64, 1}; | |||
2307 | if (NumElts == 4) | |||
2308 | return {MVT::v4i32, 1}; | |||
2309 | if (NumElts == 8 && CC != CallingConv::X86_RegCall && | |||
2310 | CC != CallingConv::Intel_OCL_BI) | |||
2311 | return {MVT::v8i16, 1}; | |||
2312 | if (NumElts == 16 && CC != CallingConv::X86_RegCall && | |||
2313 | CC != CallingConv::Intel_OCL_BI) | |||
2314 | return {MVT::v16i8, 1}; | |||
2315 | // v32i1 passes in ymm unless we have BWI and the calling convention is | |||
2316 | // regcall. | |||
2317 | if (NumElts == 32 && (!Subtarget.hasBWI() || CC != CallingConv::X86_RegCall)) | |||
2318 | return {MVT::v32i8, 1}; | |||
2319 | // Split v64i1 vectors if we don't have v64i8 available. | |||
2320 | if (NumElts == 64 && Subtarget.hasBWI() && CC != CallingConv::X86_RegCall) { | |||
2321 | if (Subtarget.useAVX512Regs()) | |||
2322 | return {MVT::v64i8, 1}; | |||
2323 | return {MVT::v32i8, 2}; | |||
2324 | } | |||
2325 | ||||
2326 | // Break wide or odd vXi1 vectors into scalars to match avx2 behavior. | |||
2327 | if (!isPowerOf2_32(NumElts) || (NumElts == 64 && !Subtarget.hasBWI()) || | |||
2328 | NumElts > 64) | |||
2329 | return {MVT::i8, NumElts}; | |||
2330 | ||||
2331 | return {MVT::INVALID_SIMPLE_VALUE_TYPE, 0}; | |||
2332 | } | |||
2333 | ||||
2334 | MVT X86TargetLowering::getRegisterTypeForCallingConv(LLVMContext &Context, | |||
2335 | CallingConv::ID CC, | |||
2336 | EVT VT) const { | |||
2337 | if (VT.isVector() && VT.getVectorElementType() == MVT::i1 && | |||
2338 | Subtarget.hasAVX512()) { | |||
2339 | unsigned NumElts = VT.getVectorNumElements(); | |||
2340 | ||||
2341 | MVT RegisterVT; | |||
2342 | unsigned NumRegisters; | |||
2343 | std::tie(RegisterVT, NumRegisters) = | |||
2344 | handleMaskRegisterForCallingConv(NumElts, CC, Subtarget); | |||
2345 | if (RegisterVT != MVT::INVALID_SIMPLE_VALUE_TYPE) | |||
2346 | return RegisterVT; | |||
2347 | } | |||
2348 | ||||
2349 | // v3f16 will be widen to v4f16. But we don't assign register class for v4f16. | |||
2350 | // So its default register type is f16. We override the type to v8f16 here. | |||
2351 | if (VT == MVT::v3f16 && Subtarget.hasFP16()) | |||
2352 | return MVT::v8f16; | |||
2353 | ||||
2354 | return TargetLowering::getRegisterTypeForCallingConv(Context, CC, VT); | |||
2355 | } | |||
2356 | ||||
2357 | unsigned X86TargetLowering::getNumRegistersForCallingConv(LLVMContext &Context, | |||
2358 | CallingConv::ID CC, | |||
2359 | EVT VT) const { | |||
2360 | if (VT.isVector() && VT.getVectorElementType() == MVT::i1 && | |||
2361 | Subtarget.hasAVX512()) { | |||
2362 | unsigned NumElts = VT.getVectorNumElements(); | |||
2363 | ||||
2364 | MVT RegisterVT; | |||
2365 | unsigned NumRegisters; | |||
2366 | std::tie(RegisterVT, NumRegisters) = | |||
2367 | handleMaskRegisterForCallingConv(NumElts, CC, Subtarget); | |||
2368 | if (RegisterVT != MVT::INVALID_SIMPLE_VALUE_TYPE) | |||
2369 | return NumRegisters; | |||
2370 | } | |||
2371 | ||||
2372 | // v3f16 will be widen to v4f16. But we don't assign register class for v4f16. | |||
2373 | // So its default register number is 3. We override the number to 1 here. | |||
2374 | if (VT == MVT::v3f16 && Subtarget.hasFP16()) | |||
2375 | return 1; | |||
2376 | ||||
2377 | return TargetLowering::getNumRegistersForCallingConv(Context, CC, VT); | |||
2378 | } | |||
2379 | ||||
2380 | unsigned X86TargetLowering::getVectorTypeBreakdownForCallingConv( | |||
2381 | LLVMContext &Context, CallingConv::ID CC, EVT VT, EVT &IntermediateVT, | |||
2382 | unsigned &NumIntermediates, MVT &RegisterVT) const { | |||
2383 | // Break wide or odd vXi1 vectors into scalars to match avx2 behavior. | |||
2384 | if (VT.isVector() && VT.getVectorElementType() == MVT::i1 && | |||
2385 | Subtarget.hasAVX512() && | |||
2386 | (!isPowerOf2_32(VT.getVectorNumElements()) || | |||
2387 | (VT.getVectorNumElements() == 64 && !Subtarget.hasBWI()) || | |||
2388 | VT.getVectorNumElements() > 64)) { | |||
2389 | RegisterVT = MVT::i8; | |||
2390 | IntermediateVT = MVT::i1; | |||
2391 | NumIntermediates = VT.getVectorNumElements(); | |||
2392 | return NumIntermediates; | |||
2393 | } | |||
2394 | ||||
2395 | // Split v64i1 vectors if we don't have v64i8 available. | |||
2396 | if (VT == MVT::v64i1 && Subtarget.hasBWI() && !Subtarget.useAVX512Regs() && | |||
2397 | CC != CallingConv::X86_RegCall) { | |||
2398 | RegisterVT = MVT::v32i8; | |||
2399 | IntermediateVT = MVT::v32i1; | |||
2400 | NumIntermediates = 2; | |||
2401 | return 2; | |||
2402 | } | |||
2403 | ||||
2404 | return TargetLowering::getVectorTypeBreakdownForCallingConv(Context, CC, VT, IntermediateVT, | |||
2405 | NumIntermediates, RegisterVT); | |||
2406 | } | |||
2407 | ||||
2408 | EVT X86TargetLowering::getSetCCResultType(const DataLayout &DL, | |||
2409 | LLVMContext& Context, | |||
2410 | EVT VT) const { | |||
2411 | if (!VT.isVector()) | |||
2412 | return MVT::i8; | |||
2413 | ||||
2414 | if (Subtarget.hasAVX512()) { | |||
2415 | // Figure out what this type will be legalized to. | |||
2416 | EVT LegalVT = VT; | |||
2417 | while (getTypeAction(Context, LegalVT) != TypeLegal) | |||
2418 | LegalVT = getTypeToTransformTo(Context, LegalVT); | |||
2419 | ||||
2420 | // If we got a 512-bit vector then we'll definitely have a vXi1 compare. | |||
2421 | if (LegalVT.getSimpleVT().is512BitVector()) | |||
2422 | return EVT::getVectorVT(Context, MVT::i1, VT.getVectorElementCount()); | |||
2423 | ||||
2424 | if (LegalVT.getSimpleVT().isVector() && Subtarget.hasVLX()) { | |||
2425 | // If we legalized to less than a 512-bit vector, then we will use a vXi1 | |||
2426 | // compare for vXi32/vXi64 for sure. If we have BWI we will also support | |||
2427 | // vXi16/vXi8. | |||
2428 | MVT EltVT = LegalVT.getSimpleVT().getVectorElementType(); | |||
2429 | if (Subtarget.hasBWI() || EltVT.getSizeInBits() >= 32) | |||
2430 | return EVT::getVectorVT(Context, MVT::i1, VT.getVectorElementCount()); | |||
2431 | } | |||
2432 | } | |||
2433 | ||||
2434 | return VT.changeVectorElementTypeToInteger(); | |||
2435 | } | |||
2436 | ||||
2437 | /// Helper for getByValTypeAlignment to determine | |||
2438 | /// the desired ByVal argument alignment. | |||
2439 | static void getMaxByValAlign(Type *Ty, Align &MaxAlign) { | |||
2440 | if (MaxAlign == 16) | |||
2441 | return; | |||
2442 | if (VectorType *VTy = dyn_cast<VectorType>(Ty)) { | |||
2443 | if (VTy->getPrimitiveSizeInBits().getFixedSize() == 128) | |||
2444 | MaxAlign = Align(16); | |||
2445 | } else if (ArrayType *ATy = dyn_cast<ArrayType>(Ty)) { | |||
2446 | Align EltAlign; | |||
2447 | getMaxByValAlign(ATy->getElementType(), EltAlign); | |||
2448 | if (EltAlign > MaxAlign) | |||
2449 | MaxAlign = EltAlign; | |||
2450 | } else if (StructType *STy = dyn_cast<StructType>(Ty)) { | |||
2451 | for (auto *EltTy : STy->elements()) { | |||
2452 | Align EltAlign; | |||
2453 | getMaxByValAlign(EltTy, EltAlign); | |||
2454 | if (EltAlign > MaxAlign) | |||
2455 | MaxAlign = EltAlign; | |||
2456 | if (MaxAlign == 16) | |||
2457 | break; | |||
2458 | } | |||
2459 | } | |||
2460 | } | |||
2461 | ||||
2462 | /// Return the desired alignment for ByVal aggregate | |||
2463 | /// function arguments in the caller parameter area. For X86, aggregates | |||
2464 | /// that contain SSE vectors are placed at 16-byte boundaries while the rest | |||
2465 | /// are at 4-byte boundaries. | |||
2466 | unsigned X86TargetLowering::getByValTypeAlignment(Type *Ty, | |||
2467 | const DataLayout &DL) const { | |||
2468 | if (Subtarget.is64Bit()) { | |||
2469 | // Max of 8 and alignment of type. | |||
2470 | Align TyAlign = DL.getABITypeAlign(Ty); | |||
2471 | if (TyAlign > 8) | |||
2472 | return TyAlign.value(); | |||
2473 | return 8; | |||
2474 | } | |||
2475 | ||||
2476 | Align Alignment(4); | |||
2477 | if (Subtarget.hasSSE1()) | |||
2478 | getMaxByValAlign(Ty, Alignment); | |||
2479 | return Alignment.value(); | |||
2480 | } | |||
2481 | ||||
2482 | /// It returns EVT::Other if the type should be determined using generic | |||
2483 | /// target-independent logic. | |||
2484 | /// For vector ops we check that the overall size isn't larger than our | |||
2485 | /// preferred vector width. | |||
2486 | EVT X86TargetLowering::getOptimalMemOpType( | |||
2487 | const MemOp &Op, const AttributeList &FuncAttributes) const { | |||
2488 | if (!FuncAttributes.hasFnAttr(Attribute::NoImplicitFloat)) { | |||
2489 | if (Op.size() >= 16 && | |||
2490 | (!Subtarget.isUnalignedMem16Slow() || Op.isAligned(Align(16)))) { | |||
2491 | // FIXME: Check if unaligned 64-byte accesses are slow. | |||
2492 | if (Op.size() >= 64 && Subtarget.hasAVX512() && | |||
2493 | (Subtarget.getPreferVectorWidth() >= 512)) { | |||
2494 | return Subtarget.hasBWI() ? MVT::v64i8 : MVT::v16i32; | |||
2495 | } | |||
2496 | // FIXME: Check if unaligned 32-byte accesses are slow. | |||
2497 | if (Op.size() >= 32 && Subtarget.hasAVX() && | |||
2498 | (Subtarget.getPreferVectorWidth() >= 256)) { | |||
2499 | // Although this isn't a well-supported type for AVX1, we'll let | |||
2500 | // legalization and shuffle lowering produce the optimal codegen. If we | |||
2501 | // choose an optimal type with a vector element larger than a byte, | |||
2502 | // getMemsetStores() may create an intermediate splat (using an integer | |||
2503 | // multiply) before we splat as a vector. | |||
2504 | return MVT::v32i8; | |||
2505 | } | |||
2506 | if (Subtarget.hasSSE2() && (Subtarget.getPreferVectorWidth() >= 128)) | |||
2507 | return MVT::v16i8; | |||
2508 | // TODO: Can SSE1 handle a byte vector? | |||
2509 | // If we have SSE1 registers we should be able to use them. | |||
2510 | if (Subtarget.hasSSE1() && (Subtarget.is64Bit() || Subtarget.hasX87()) && | |||
2511 | (Subtarget.getPreferVectorWidth() >= 128)) | |||
2512 | return MVT::v4f32; | |||
2513 | } else if (((Op.isMemcpy() && !Op.isMemcpyStrSrc()) || Op.isZeroMemset()) && | |||
2514 | Op.size() >= 8 && !Subtarget.is64Bit() && Subtarget.hasSSE2()) { | |||
2515 | // Do not use f64 to lower memcpy if source is string constant. It's | |||
2516 | // better to use i32 to avoid the loads. | |||
2517 | // Also, do not use f64 to lower memset unless this is a memset of zeros. | |||
2518 | // The gymnastics of splatting a byte value into an XMM register and then | |||
2519 | // only using 8-byte stores (because this is a CPU with slow unaligned | |||
2520 | // 16-byte accesses) makes that a loser. | |||
2521 | return MVT::f64; | |||
2522 | } | |||
2523 | } | |||
2524 | // This is a compromise. If we reach here, unaligned accesses may be slow on | |||
2525 | // this target. However, creating smaller, aligned accesses could be even | |||
2526 | // slower and would certainly be a lot more code. | |||
2527 | if (Subtarget.is64Bit() && Op.size() >= 8) | |||
2528 | return MVT::i64; | |||
2529 | return MVT::i32; | |||
2530 | } | |||
2531 | ||||
2532 | bool X86TargetLowering::isSafeMemOpType(MVT VT) const { | |||
2533 | if (VT == MVT::f32) | |||
2534 | return X86ScalarSSEf32; | |||
2535 | if (VT == MVT::f64) | |||
2536 | return X86ScalarSSEf64; | |||
2537 | return true; | |||
2538 | } | |||
2539 | ||||
2540 | bool X86TargetLowering::allowsMisalignedMemoryAccesses( | |||
2541 | EVT VT, unsigned, Align Alignment, MachineMemOperand::Flags Flags, | |||
2542 | bool *Fast) const { | |||
2543 | if (Fast) { | |||
2544 | switch (VT.getSizeInBits()) { | |||
2545 | default: | |||
2546 | // 8-byte and under are always assumed to be fast. | |||
2547 | *Fast = true; | |||
2548 | break; | |||
2549 | case 128: | |||
2550 | *Fast = !Subtarget.isUnalignedMem16Slow(); | |||
2551 | break; | |||
2552 | case 256: | |||
2553 | *Fast = !Subtarget.isUnalignedMem32Slow(); | |||
2554 | break; | |||
2555 | // TODO: What about AVX-512 (512-bit) accesses? | |||
2556 | } | |||
2557 | } | |||
2558 | // NonTemporal vector memory ops must be aligned. | |||
2559 | if (!!(Flags & MachineMemOperand::MONonTemporal) && VT.isVector()) { | |||
2560 | // NT loads can only be vector aligned, so if its less aligned than the | |||
2561 | // minimum vector size (which we can split the vector down to), we might as | |||
2562 | // well use a regular unaligned vector load. | |||
2563 | // We don't have any NT loads pre-SSE41. | |||
2564 | if (!!(Flags & MachineMemOperand::MOLoad)) | |||
2565 | return (Alignment < 16 || !Subtarget.hasSSE41()); | |||
2566 | return false; | |||
2567 | } | |||
2568 | // Misaligned accesses of any size are always allowed. | |||
2569 | return true; | |||
2570 | } | |||
2571 | ||||
2572 | /// Return the entry encoding for a jump table in the | |||
2573 | /// current function. The returned value is a member of the | |||
2574 | /// MachineJumpTableInfo::JTEntryKind enum. | |||
2575 | unsigned X86TargetLowering::getJumpTableEncoding() const { | |||
2576 | // In GOT pic mode, each entry in the jump table is emitted as a @GOTOFF | |||
2577 | // symbol. | |||
2578 | if (isPositionIndependent() && Subtarget.isPICStyleGOT()) | |||
2579 | return MachineJumpTableInfo::EK_Custom32; | |||
2580 | ||||
2581 | // Otherwise, use the normal jump table encoding heuristics. | |||
2582 | return TargetLowering::getJumpTableEncoding(); | |||
2583 | } | |||
2584 | ||||
2585 | bool X86TargetLowering::useSoftFloat() const { | |||
2586 | return Subtarget.useSoftFloat(); | |||
2587 | } | |||
2588 | ||||
2589 | void X86TargetLowering::markLibCallAttributes(MachineFunction *MF, unsigned CC, | |||
2590 | ArgListTy &Args) const { | |||
2591 | ||||
2592 | // Only relabel X86-32 for C / Stdcall CCs. | |||
2593 | if (Subtarget.is64Bit()) | |||
2594 | return; | |||
2595 | if (CC != CallingConv::C && CC != CallingConv::X86_StdCall) | |||
2596 | return; | |||
2597 | unsigned ParamRegs = 0; | |||
2598 | if (auto *M = MF->getFunction().getParent()) | |||
2599 | ParamRegs = M->getNumberRegisterParameters(); | |||
2600 | ||||
2601 | // Mark the first N int arguments as having reg | |||
2602 | for (auto &Arg : Args) { | |||
2603 | Type *T = Arg.Ty; | |||
2604 | if (T->isIntOrPtrTy()) | |||
2605 | if (MF->getDataLayout().getTypeAllocSize(T) <= 8) { | |||
2606 | unsigned numRegs = 1; | |||
2607 | if (MF->getDataLayout().getTypeAllocSize(T) > 4) | |||
2608 | numRegs = 2; | |||
2609 | if (ParamRegs < numRegs) | |||
2610 | return; | |||
2611 | ParamRegs -= numRegs; | |||
2612 | Arg.IsInReg = true; | |||
2613 | } | |||
2614 | } | |||
2615 | } | |||
2616 | ||||
2617 | const MCExpr * | |||
2618 | X86TargetLowering::LowerCustomJumpTableEntry(const MachineJumpTableInfo *MJTI, | |||
2619 | const MachineBasicBlock *MBB, | |||
2620 | unsigned uid,MCContext &Ctx) const{ | |||
2621 | assert(isPositionIndependent() && Subtarget.isPICStyleGOT())(static_cast <bool> (isPositionIndependent() && Subtarget.isPICStyleGOT()) ? void (0) : __assert_fail ("isPositionIndependent() && Subtarget.isPICStyleGOT()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 2621, __extension__ __PRETTY_FUNCTION__)); | |||
2622 | // In 32-bit ELF systems, our jump table entries are formed with @GOTOFF | |||
2623 | // entries. | |||
2624 | return MCSymbolRefExpr::create(MBB->getSymbol(), | |||
2625 | MCSymbolRefExpr::VK_GOTOFF, Ctx); | |||
2626 | } | |||
2627 | ||||
2628 | /// Returns relocation base for the given PIC jumptable. | |||
2629 | SDValue X86TargetLowering::getPICJumpTableRelocBase(SDValue Table, | |||
2630 | SelectionDAG &DAG) const { | |||
2631 | if (!Subtarget.is64Bit()) | |||
2632 | // This doesn't have SDLoc associated with it, but is not really the | |||
2633 | // same as a Register. | |||
2634 | return DAG.getNode(X86ISD::GlobalBaseReg, SDLoc(), | |||
2635 | getPointerTy(DAG.getDataLayout())); | |||
2636 | return Table; | |||
2637 | } | |||
2638 | ||||
2639 | /// This returns the relocation base for the given PIC jumptable, | |||
2640 | /// the same as getPICJumpTableRelocBase, but as an MCExpr. | |||
2641 | const MCExpr *X86TargetLowering:: | |||
2642 | getPICJumpTableRelocBaseExpr(const MachineFunction *MF, unsigned JTI, | |||
2643 | MCContext &Ctx) const { | |||
2644 | // X86-64 uses RIP relative addressing based on the jump table label. | |||
2645 | if (Subtarget.isPICStyleRIPRel()) | |||
2646 | return TargetLowering::getPICJumpTableRelocBaseExpr(MF, JTI, Ctx); | |||
2647 | ||||
2648 | // Otherwise, the reference is relative to the PIC base. | |||
2649 | return MCSymbolRefExpr::create(MF->getPICBaseSymbol(), Ctx); | |||
2650 | } | |||
2651 | ||||
2652 | std::pair<const TargetRegisterClass *, uint8_t> | |||
2653 | X86TargetLowering::findRepresentativeClass(const TargetRegisterInfo *TRI, | |||
2654 | MVT VT) const { | |||
2655 | const TargetRegisterClass *RRC = nullptr; | |||
2656 | uint8_t Cost = 1; | |||
2657 | switch (VT.SimpleTy) { | |||
2658 | default: | |||
2659 | return TargetLowering::findRepresentativeClass(TRI, VT); | |||
2660 | case MVT::i8: case MVT::i16: case MVT::i32: case MVT::i64: | |||
2661 | RRC = Subtarget.is64Bit() ? &X86::GR64RegClass : &X86::GR32RegClass; | |||
2662 | break; | |||
2663 | case MVT::x86mmx: | |||
2664 | RRC = &X86::VR64RegClass; | |||
2665 | break; | |||
2666 | case MVT::f32: case MVT::f64: | |||
2667 | case MVT::v16i8: case MVT::v8i16: case MVT::v4i32: case MVT::v2i64: | |||
2668 | case MVT::v4f32: case MVT::v2f64: | |||
2669 | case MVT::v32i8: case MVT::v16i16: case MVT::v8i32: case MVT::v4i64: | |||
2670 | case MVT::v8f32: case MVT::v4f64: | |||
2671 | case MVT::v64i8: case MVT::v32i16: case MVT::v16i32: case MVT::v8i64: | |||
2672 | case MVT::v16f32: case MVT::v8f64: | |||
2673 | RRC = &X86::VR128XRegClass; | |||
2674 | break; | |||
2675 | } | |||
2676 | return std::make_pair(RRC, Cost); | |||
2677 | } | |||
2678 | ||||
2679 | unsigned X86TargetLowering::getAddressSpace() const { | |||
2680 | if (Subtarget.is64Bit()) | |||
2681 | return (getTargetMachine().getCodeModel() == CodeModel::Kernel) ? 256 : 257; | |||
2682 | return 256; | |||
2683 | } | |||
2684 | ||||
2685 | static bool hasStackGuardSlotTLS(const Triple &TargetTriple) { | |||
2686 | return TargetTriple.isOSGlibc() || TargetTriple.isOSFuchsia() || | |||
2687 | (TargetTriple.isAndroid() && !TargetTriple.isAndroidVersionLT(17)); | |||
2688 | } | |||
2689 | ||||
2690 | static Constant* SegmentOffset(IRBuilderBase &IRB, | |||
2691 | int Offset, unsigned AddressSpace) { | |||
2692 | return ConstantExpr::getIntToPtr( | |||
2693 | ConstantInt::get(Type::getInt32Ty(IRB.getContext()), Offset), | |||
2694 | Type::getInt8PtrTy(IRB.getContext())->getPointerTo(AddressSpace)); | |||
2695 | } | |||
2696 | ||||
2697 | Value *X86TargetLowering::getIRStackGuard(IRBuilderBase &IRB) const { | |||
2698 | // glibc, bionic, and Fuchsia have a special slot for the stack guard in | |||
2699 | // tcbhead_t; use it instead of the usual global variable (see | |||
2700 | // sysdeps/{i386,x86_64}/nptl/tls.h) | |||
2701 | if (hasStackGuardSlotTLS(Subtarget.getTargetTriple())) { | |||
2702 | if (Subtarget.isTargetFuchsia()) { | |||
2703 | // <zircon/tls.h> defines ZX_TLS_STACK_GUARD_OFFSET with this value. | |||
2704 | return SegmentOffset(IRB, 0x10, getAddressSpace()); | |||
2705 | } else { | |||
2706 | unsigned AddressSpace = getAddressSpace(); | |||
2707 | Module *M = IRB.GetInsertBlock()->getParent()->getParent(); | |||
2708 | // Specially, some users may customize the base reg and offset. | |||
2709 | int Offset = M->getStackProtectorGuardOffset(); | |||
2710 | // If we don't set -stack-protector-guard-offset value: | |||
2711 | // %fs:0x28, unless we're using a Kernel code model, in which case | |||
2712 | // it's %gs:0x28. gs:0x14 on i386. | |||
2713 | if (Offset == INT_MAX2147483647) | |||
2714 | Offset = (Subtarget.is64Bit()) ? 0x28 : 0x14; | |||
2715 | ||||
2716 | StringRef GuardReg = M->getStackProtectorGuardReg(); | |||
2717 | if (GuardReg == "fs") | |||
2718 | AddressSpace = X86AS::FS; | |||
2719 | else if (GuardReg == "gs") | |||
2720 | AddressSpace = X86AS::GS; | |||
2721 | return SegmentOffset(IRB, Offset, AddressSpace); | |||
2722 | } | |||
2723 | } | |||
2724 | return TargetLowering::getIRStackGuard(IRB); | |||
2725 | } | |||
2726 | ||||
2727 | void X86TargetLowering::insertSSPDeclarations(Module &M) const { | |||
2728 | // MSVC CRT provides functionalities for stack protection. | |||
2729 | if (Subtarget.getTargetTriple().isWindowsMSVCEnvironment() || | |||
2730 | Subtarget.getTargetTriple().isWindowsItaniumEnvironment()) { | |||
2731 | // MSVC CRT has a global variable holding security cookie. | |||
2732 | M.getOrInsertGlobal("__security_cookie", | |||
2733 | Type::getInt8PtrTy(M.getContext())); | |||
2734 | ||||
2735 | // MSVC CRT has a function to validate security cookie. | |||
2736 | FunctionCallee SecurityCheckCookie = M.getOrInsertFunction( | |||
2737 | "__security_check_cookie", Type::getVoidTy(M.getContext()), | |||
2738 | Type::getInt8PtrTy(M.getContext())); | |||
2739 | if (Function *F = dyn_cast<Function>(SecurityCheckCookie.getCallee())) { | |||
2740 | F->setCallingConv(CallingConv::X86_FastCall); | |||
2741 | F->addParamAttr(0, Attribute::AttrKind::InReg); | |||
2742 | } | |||
2743 | return; | |||
2744 | } | |||
2745 | ||||
2746 | StringRef GuardMode = M.getStackProtectorGuard(); | |||
2747 | ||||
2748 | // glibc, bionic, and Fuchsia have a special slot for the stack guard. | |||
2749 | if ((GuardMode == "tls" || GuardMode.empty()) && | |||
2750 | hasStackGuardSlotTLS(Subtarget.getTargetTriple())) | |||
2751 | return; | |||
2752 | TargetLowering::insertSSPDeclarations(M); | |||
2753 | } | |||
2754 | ||||
2755 | Value *X86TargetLowering::getSDagStackGuard(const Module &M) const { | |||
2756 | // MSVC CRT has a global variable holding security cookie. | |||
2757 | if (Subtarget.getTargetTriple().isWindowsMSVCEnvironment() || | |||
2758 | Subtarget.getTargetTriple().isWindowsItaniumEnvironment()) { | |||
2759 | return M.getGlobalVariable("__security_cookie"); | |||
2760 | } | |||
2761 | return TargetLowering::getSDagStackGuard(M); | |||
2762 | } | |||
2763 | ||||
2764 | Function *X86TargetLowering::getSSPStackGuardCheck(const Module &M) const { | |||
2765 | // MSVC CRT has a function to validate security cookie. | |||
2766 | if (Subtarget.getTargetTriple().isWindowsMSVCEnvironment() || | |||
2767 | Subtarget.getTargetTriple().isWindowsItaniumEnvironment()) { | |||
2768 | return M.getFunction("__security_check_cookie"); | |||
2769 | } | |||
2770 | return TargetLowering::getSSPStackGuardCheck(M); | |||
2771 | } | |||
2772 | ||||
2773 | Value * | |||
2774 | X86TargetLowering::getSafeStackPointerLocation(IRBuilderBase &IRB) const { | |||
2775 | if (Subtarget.getTargetTriple().isOSContiki()) | |||
2776 | return getDefaultSafeStackPointerLocation(IRB, false); | |||
2777 | ||||
2778 | // Android provides a fixed TLS slot for the SafeStack pointer. See the | |||
2779 | // definition of TLS_SLOT_SAFESTACK in | |||
2780 | // https://android.googlesource.com/platform/bionic/+/master/libc/private/bionic_tls.h | |||
2781 | if (Subtarget.isTargetAndroid()) { | |||
2782 | // %fs:0x48, unless we're using a Kernel code model, in which case it's %gs: | |||
2783 | // %gs:0x24 on i386 | |||
2784 | int Offset = (Subtarget.is64Bit()) ? 0x48 : 0x24; | |||
2785 | return SegmentOffset(IRB, Offset, getAddressSpace()); | |||
2786 | } | |||
2787 | ||||
2788 | // Fuchsia is similar. | |||
2789 | if (Subtarget.isTargetFuchsia()) { | |||
2790 | // <zircon/tls.h> defines ZX_TLS_UNSAFE_SP_OFFSET with this value. | |||
2791 | return SegmentOffset(IRB, 0x18, getAddressSpace()); | |||
2792 | } | |||
2793 | ||||
2794 | return TargetLowering::getSafeStackPointerLocation(IRB); | |||
2795 | } | |||
2796 | ||||
2797 | //===----------------------------------------------------------------------===// | |||
2798 | // Return Value Calling Convention Implementation | |||
2799 | //===----------------------------------------------------------------------===// | |||
2800 | ||||
2801 | bool X86TargetLowering::CanLowerReturn( | |||
2802 | CallingConv::ID CallConv, MachineFunction &MF, bool isVarArg, | |||
2803 | const SmallVectorImpl<ISD::OutputArg> &Outs, LLVMContext &Context) const { | |||
2804 | SmallVector<CCValAssign, 16> RVLocs; | |||
2805 | CCState CCInfo(CallConv, isVarArg, MF, RVLocs, Context); | |||
2806 | return CCInfo.CheckReturn(Outs, RetCC_X86); | |||
2807 | } | |||
2808 | ||||
2809 | const MCPhysReg *X86TargetLowering::getScratchRegisters(CallingConv::ID) const { | |||
2810 | static const MCPhysReg ScratchRegs[] = { X86::R11, 0 }; | |||
2811 | return ScratchRegs; | |||
2812 | } | |||
2813 | ||||
2814 | /// Lowers masks values (v*i1) to the local register values | |||
2815 | /// \returns DAG node after lowering to register type | |||
2816 | static SDValue lowerMasksToReg(const SDValue &ValArg, const EVT &ValLoc, | |||
2817 | const SDLoc &Dl, SelectionDAG &DAG) { | |||
2818 | EVT ValVT = ValArg.getValueType(); | |||
2819 | ||||
2820 | if (ValVT == MVT::v1i1) | |||
2821 | return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, Dl, ValLoc, ValArg, | |||
2822 | DAG.getIntPtrConstant(0, Dl)); | |||
2823 | ||||
2824 | if ((ValVT == MVT::v8i1 && (ValLoc == MVT::i8 || ValLoc == MVT::i32)) || | |||
2825 | (ValVT == MVT::v16i1 && (ValLoc == MVT::i16 || ValLoc == MVT::i32))) { | |||
2826 | // Two stage lowering might be required | |||
2827 | // bitcast: v8i1 -> i8 / v16i1 -> i16 | |||
2828 | // anyextend: i8 -> i32 / i16 -> i32 | |||
2829 | EVT TempValLoc = ValVT == MVT::v8i1 ? MVT::i8 : MVT::i16; | |||
2830 | SDValue ValToCopy = DAG.getBitcast(TempValLoc, ValArg); | |||
2831 | if (ValLoc == MVT::i32) | |||
2832 | ValToCopy = DAG.getNode(ISD::ANY_EXTEND, Dl, ValLoc, ValToCopy); | |||
2833 | return ValToCopy; | |||
2834 | } | |||
2835 | ||||
2836 | if ((ValVT == MVT::v32i1 && ValLoc == MVT::i32) || | |||
2837 | (ValVT == MVT::v64i1 && ValLoc == MVT::i64)) { | |||
2838 | // One stage lowering is required | |||
2839 | // bitcast: v32i1 -> i32 / v64i1 -> i64 | |||
2840 | return DAG.getBitcast(ValLoc, ValArg); | |||
2841 | } | |||
2842 | ||||
2843 | return DAG.getNode(ISD::ANY_EXTEND, Dl, ValLoc, ValArg); | |||
2844 | } | |||
2845 | ||||
2846 | /// Breaks v64i1 value into two registers and adds the new node to the DAG | |||
2847 | static void Passv64i1ArgInRegs( | |||
2848 | const SDLoc &Dl, SelectionDAG &DAG, SDValue &Arg, | |||
2849 | SmallVectorImpl<std::pair<Register, SDValue>> &RegsToPass, CCValAssign &VA, | |||
2850 | CCValAssign &NextVA, const X86Subtarget &Subtarget) { | |||
2851 | assert(Subtarget.hasBWI() && "Expected AVX512BW target!")(static_cast <bool> (Subtarget.hasBWI() && "Expected AVX512BW target!" ) ? void (0) : __assert_fail ("Subtarget.hasBWI() && \"Expected AVX512BW target!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 2851, __extension__ __PRETTY_FUNCTION__)); | |||
2852 | assert(Subtarget.is32Bit() && "Expecting 32 bit target")(static_cast <bool> (Subtarget.is32Bit() && "Expecting 32 bit target" ) ? void (0) : __assert_fail ("Subtarget.is32Bit() && \"Expecting 32 bit target\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 2852, __extension__ __PRETTY_FUNCTION__)); | |||
2853 | assert(Arg.getValueType() == MVT::i64 && "Expecting 64 bit value")(static_cast <bool> (Arg.getValueType() == MVT::i64 && "Expecting 64 bit value") ? void (0) : __assert_fail ("Arg.getValueType() == MVT::i64 && \"Expecting 64 bit value\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 2853, __extension__ __PRETTY_FUNCTION__)); | |||
2854 | assert(VA.isRegLoc() && NextVA.isRegLoc() &&(static_cast <bool> (VA.isRegLoc() && NextVA.isRegLoc () && "The value should reside in two registers") ? void (0) : __assert_fail ("VA.isRegLoc() && NextVA.isRegLoc() && \"The value should reside in two registers\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 2855, __extension__ __PRETTY_FUNCTION__)) | |||
2855 | "The value should reside in two registers")(static_cast <bool> (VA.isRegLoc() && NextVA.isRegLoc () && "The value should reside in two registers") ? void (0) : __assert_fail ("VA.isRegLoc() && NextVA.isRegLoc() && \"The value should reside in two registers\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 2855, __extension__ __PRETTY_FUNCTION__)); | |||
2856 | ||||
2857 | // Before splitting the value we cast it to i64 | |||
2858 | Arg = DAG.getBitcast(MVT::i64, Arg); | |||
2859 | ||||
2860 | // Splitting the value into two i32 types | |||
2861 | SDValue Lo, Hi; | |||
2862 | Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, Dl, MVT::i32, Arg, | |||
2863 | DAG.getConstant(0, Dl, MVT::i32)); | |||
2864 | Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, Dl, MVT::i32, Arg, | |||
2865 | DAG.getConstant(1, Dl, MVT::i32)); | |||
2866 | ||||
2867 | // Attach the two i32 types into corresponding registers | |||
2868 | RegsToPass.push_back(std::make_pair(VA.getLocReg(), Lo)); | |||
2869 | RegsToPass.push_back(std::make_pair(NextVA.getLocReg(), Hi)); | |||
2870 | } | |||
2871 | ||||
2872 | SDValue | |||
2873 | X86TargetLowering::LowerReturn(SDValue Chain, CallingConv::ID CallConv, | |||
2874 | bool isVarArg, | |||
2875 | const SmallVectorImpl<ISD::OutputArg> &Outs, | |||
2876 | const SmallVectorImpl<SDValue> &OutVals, | |||
2877 | const SDLoc &dl, SelectionDAG &DAG) const { | |||
2878 | MachineFunction &MF = DAG.getMachineFunction(); | |||
2879 | X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>(); | |||
2880 | ||||
2881 | // In some cases we need to disable registers from the default CSR list. | |||
2882 | // For example, when they are used for argument passing. | |||
2883 | bool ShouldDisableCalleeSavedRegister = | |||
2884 | CallConv == CallingConv::X86_RegCall || | |||
2885 | MF.getFunction().hasFnAttribute("no_caller_saved_registers"); | |||
2886 | ||||
2887 | if (CallConv == CallingConv::X86_INTR && !Outs.empty()) | |||
2888 | report_fatal_error("X86 interrupts may not return any value"); | |||
2889 | ||||
2890 | SmallVector<CCValAssign, 16> RVLocs; | |||
2891 | CCState CCInfo(CallConv, isVarArg, MF, RVLocs, *DAG.getContext()); | |||
2892 | CCInfo.AnalyzeReturn(Outs, RetCC_X86); | |||
2893 | ||||
2894 | SmallVector<std::pair<Register, SDValue>, 4> RetVals; | |||
2895 | for (unsigned I = 0, OutsIndex = 0, E = RVLocs.size(); I != E; | |||
2896 | ++I, ++OutsIndex) { | |||
2897 | CCValAssign &VA = RVLocs[I]; | |||
2898 | assert(VA.isRegLoc() && "Can only return in registers!")(static_cast <bool> (VA.isRegLoc() && "Can only return in registers!" ) ? void (0) : __assert_fail ("VA.isRegLoc() && \"Can only return in registers!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 2898, __extension__ __PRETTY_FUNCTION__)); | |||
2899 | ||||
2900 | // Add the register to the CalleeSaveDisableRegs list. | |||
2901 | if (ShouldDisableCalleeSavedRegister) | |||
2902 | MF.getRegInfo().disableCalleeSavedRegister(VA.getLocReg()); | |||
2903 | ||||
2904 | SDValue ValToCopy = OutVals[OutsIndex]; | |||
2905 | EVT ValVT = ValToCopy.getValueType(); | |||
2906 | ||||
2907 | // Promote values to the appropriate types. | |||
2908 | if (VA.getLocInfo() == CCValAssign::SExt) | |||
2909 | ValToCopy = DAG.getNode(ISD::SIGN_EXTEND, dl, VA.getLocVT(), ValToCopy); | |||
2910 | else if (VA.getLocInfo() == CCValAssign::ZExt) | |||
2911 | ValToCopy = DAG.getNode(ISD::ZERO_EXTEND, dl, VA.getLocVT(), ValToCopy); | |||
2912 | else if (VA.getLocInfo() == CCValAssign::AExt) { | |||
2913 | if (ValVT.isVector() && ValVT.getVectorElementType() == MVT::i1) | |||
2914 | ValToCopy = lowerMasksToReg(ValToCopy, VA.getLocVT(), dl, DAG); | |||
2915 | else | |||
2916 | ValToCopy = DAG.getNode(ISD::ANY_EXTEND, dl, VA.getLocVT(), ValToCopy); | |||
2917 | } | |||
2918 | else if (VA.getLocInfo() == CCValAssign::BCvt) | |||
2919 | ValToCopy = DAG.getBitcast(VA.getLocVT(), ValToCopy); | |||
2920 | ||||
2921 | assert(VA.getLocInfo() != CCValAssign::FPExt &&(static_cast <bool> (VA.getLocInfo() != CCValAssign::FPExt && "Unexpected FP-extend for return value.") ? void ( 0) : __assert_fail ("VA.getLocInfo() != CCValAssign::FPExt && \"Unexpected FP-extend for return value.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 2922, __extension__ __PRETTY_FUNCTION__)) | |||
2922 | "Unexpected FP-extend for return value.")(static_cast <bool> (VA.getLocInfo() != CCValAssign::FPExt && "Unexpected FP-extend for return value.") ? void ( 0) : __assert_fail ("VA.getLocInfo() != CCValAssign::FPExt && \"Unexpected FP-extend for return value.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 2922, __extension__ __PRETTY_FUNCTION__)); | |||
2923 | ||||
2924 | // Report an error if we have attempted to return a value via an XMM | |||
2925 | // register and SSE was disabled. | |||
2926 | if (!Subtarget.hasSSE1() && X86::FR32XRegClass.contains(VA.getLocReg())) { | |||
2927 | errorUnsupported(DAG, dl, "SSE register return with SSE disabled"); | |||
2928 | VA.convertToReg(X86::FP0); // Set reg to FP0, avoid hitting asserts. | |||
2929 | } else if (!Subtarget.hasSSE2() && | |||
2930 | X86::FR64XRegClass.contains(VA.getLocReg()) && | |||
2931 | ValVT == MVT::f64) { | |||
2932 | // When returning a double via an XMM register, report an error if SSE2 is | |||
2933 | // not enabled. | |||
2934 | errorUnsupported(DAG, dl, "SSE2 register return with SSE2 disabled"); | |||
2935 | VA.convertToReg(X86::FP0); // Set reg to FP0, avoid hitting asserts. | |||
2936 | } | |||
2937 | ||||
2938 | // Returns in ST0/ST1 are handled specially: these are pushed as operands to | |||
2939 | // the RET instruction and handled by the FP Stackifier. | |||
2940 | if (VA.getLocReg() == X86::FP0 || | |||
2941 | VA.getLocReg() == X86::FP1) { | |||
2942 | // If this is a copy from an xmm register to ST(0), use an FPExtend to | |||
2943 | // change the value to the FP stack register class. | |||
2944 | if (isScalarFPTypeInSSEReg(VA.getValVT())) | |||
2945 | ValToCopy = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f80, ValToCopy); | |||
2946 | RetVals.push_back(std::make_pair(VA.getLocReg(), ValToCopy)); | |||
2947 | // Don't emit a copytoreg. | |||
2948 | continue; | |||
2949 | } | |||
2950 | ||||
2951 | // 64-bit vector (MMX) values are returned in XMM0 / XMM1 except for v1i64 | |||
2952 | // which is returned in RAX / RDX. | |||
2953 | if (Subtarget.is64Bit()) { | |||
2954 | if (ValVT == MVT::x86mmx) { | |||
2955 | if (VA.getLocReg() == X86::XMM0 || VA.getLocReg() == X86::XMM1) { | |||
2956 | ValToCopy = DAG.getBitcast(MVT::i64, ValToCopy); | |||
2957 | ValToCopy = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2i64, | |||
2958 | ValToCopy); | |||
2959 | // If we don't have SSE2 available, convert to v4f32 so the generated | |||
2960 | // register is legal. | |||
2961 | if (!Subtarget.hasSSE2()) | |||
2962 | ValToCopy = DAG.getBitcast(MVT::v4f32, ValToCopy); | |||
2963 | } | |||
2964 | } | |||
2965 | } | |||
2966 | ||||
2967 | if (VA.needsCustom()) { | |||
2968 | assert(VA.getValVT() == MVT::v64i1 &&(static_cast <bool> (VA.getValVT() == MVT::v64i1 && "Currently the only custom case is when we split v64i1 to 2 regs" ) ? void (0) : __assert_fail ("VA.getValVT() == MVT::v64i1 && \"Currently the only custom case is when we split v64i1 to 2 regs\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 2969, __extension__ __PRETTY_FUNCTION__)) | |||
2969 | "Currently the only custom case is when we split v64i1 to 2 regs")(static_cast <bool> (VA.getValVT() == MVT::v64i1 && "Currently the only custom case is when we split v64i1 to 2 regs" ) ? void (0) : __assert_fail ("VA.getValVT() == MVT::v64i1 && \"Currently the only custom case is when we split v64i1 to 2 regs\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 2969, __extension__ __PRETTY_FUNCTION__)); | |||
2970 | ||||
2971 | Passv64i1ArgInRegs(dl, DAG, ValToCopy, RetVals, VA, RVLocs[++I], | |||
2972 | Subtarget); | |||
2973 | ||||
2974 | // Add the second register to the CalleeSaveDisableRegs list. | |||
2975 | if (ShouldDisableCalleeSavedRegister) | |||
2976 | MF.getRegInfo().disableCalleeSavedRegister(RVLocs[I].getLocReg()); | |||
2977 | } else { | |||
2978 | RetVals.push_back(std::make_pair(VA.getLocReg(), ValToCopy)); | |||
2979 | } | |||
2980 | } | |||
2981 | ||||
2982 | SDValue Flag; | |||
2983 | SmallVector<SDValue, 6> RetOps; | |||
2984 | RetOps.push_back(Chain); // Operand #0 = Chain (updated below) | |||
2985 | // Operand #1 = Bytes To Pop | |||
2986 | RetOps.push_back(DAG.getTargetConstant(FuncInfo->getBytesToPopOnReturn(), dl, | |||
2987 | MVT::i32)); | |||
2988 | ||||
2989 | // Copy the result values into the output registers. | |||
2990 | for (auto &RetVal : RetVals) { | |||
2991 | if (RetVal.first == X86::FP0 || RetVal.first == X86::FP1) { | |||
2992 | RetOps.push_back(RetVal.second); | |||
2993 | continue; // Don't emit a copytoreg. | |||
2994 | } | |||
2995 | ||||
2996 | Chain = DAG.getCopyToReg(Chain, dl, RetVal.first, RetVal.second, Flag); | |||
2997 | Flag = Chain.getValue(1); | |||
2998 | RetOps.push_back( | |||
2999 | DAG.getRegister(RetVal.first, RetVal.second.getValueType())); | |||
3000 | } | |||
3001 | ||||
3002 | // Swift calling convention does not require we copy the sret argument | |||
3003 | // into %rax/%eax for the return, and SRetReturnReg is not set for Swift. | |||
3004 | ||||
3005 | // All x86 ABIs require that for returning structs by value we copy | |||
3006 | // the sret argument into %rax/%eax (depending on ABI) for the return. | |||
3007 | // We saved the argument into a virtual register in the entry block, | |||
3008 | // so now we copy the value out and into %rax/%eax. | |||
3009 | // | |||
3010 | // Checking Function.hasStructRetAttr() here is insufficient because the IR | |||
3011 | // may not have an explicit sret argument. If FuncInfo.CanLowerReturn is | |||
3012 | // false, then an sret argument may be implicitly inserted in the SelDAG. In | |||
3013 | // either case FuncInfo->setSRetReturnReg() will have been called. | |||
3014 | if (Register SRetReg = FuncInfo->getSRetReturnReg()) { | |||
3015 | // When we have both sret and another return value, we should use the | |||
3016 | // original Chain stored in RetOps[0], instead of the current Chain updated | |||
3017 | // in the above loop. If we only have sret, RetOps[0] equals to Chain. | |||
3018 | ||||
3019 | // For the case of sret and another return value, we have | |||
3020 | // Chain_0 at the function entry | |||
3021 | // Chain_1 = getCopyToReg(Chain_0) in the above loop | |||
3022 | // If we use Chain_1 in getCopyFromReg, we will have | |||
3023 | // Val = getCopyFromReg(Chain_1) | |||
3024 | // Chain_2 = getCopyToReg(Chain_1, Val) from below | |||
3025 | ||||
3026 | // getCopyToReg(Chain_0) will be glued together with | |||
3027 | // getCopyToReg(Chain_1, Val) into Unit A, getCopyFromReg(Chain_1) will be | |||
3028 | // in Unit B, and we will have cyclic dependency between Unit A and Unit B: | |||
3029 | // Data dependency from Unit B to Unit A due to usage of Val in | |||
3030 | // getCopyToReg(Chain_1, Val) | |||
3031 | // Chain dependency from Unit A to Unit B | |||
3032 | ||||
3033 | // So here, we use RetOps[0] (i.e Chain_0) for getCopyFromReg. | |||
3034 | SDValue Val = DAG.getCopyFromReg(RetOps[0], dl, SRetReg, | |||
3035 | getPointerTy(MF.getDataLayout())); | |||
3036 | ||||
3037 | Register RetValReg | |||
3038 | = (Subtarget.is64Bit() && !Subtarget.isTarget64BitILP32()) ? | |||
3039 | X86::RAX : X86::EAX; | |||
3040 | Chain = DAG.getCopyToReg(Chain, dl, RetValReg, Val, Flag); | |||
3041 | Flag = Chain.getValue(1); | |||
3042 | ||||
3043 | // RAX/EAX now acts like a return value. | |||
3044 | RetOps.push_back( | |||
3045 | DAG.getRegister(RetValReg, getPointerTy(DAG.getDataLayout()))); | |||
3046 | ||||
3047 | // Add the returned register to the CalleeSaveDisableRegs list. | |||
3048 | if (ShouldDisableCalleeSavedRegister) | |||
3049 | MF.getRegInfo().disableCalleeSavedRegister(RetValReg); | |||
3050 | } | |||
3051 | ||||
3052 | const X86RegisterInfo *TRI = Subtarget.getRegisterInfo(); | |||
3053 | const MCPhysReg *I = | |||
3054 | TRI->getCalleeSavedRegsViaCopy(&DAG.getMachineFunction()); | |||
3055 | if (I) { | |||
3056 | for (; *I; ++I) { | |||
3057 | if (X86::GR64RegClass.contains(*I)) | |||
3058 | RetOps.push_back(DAG.getRegister(*I, MVT::i64)); | |||
3059 | else | |||
3060 | llvm_unreachable("Unexpected register class in CSRsViaCopy!")::llvm::llvm_unreachable_internal("Unexpected register class in CSRsViaCopy!" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 3060); | |||
3061 | } | |||
3062 | } | |||
3063 | ||||
3064 | RetOps[0] = Chain; // Update chain. | |||
3065 | ||||
3066 | // Add the flag if we have it. | |||
3067 | if (Flag.getNode()) | |||
3068 | RetOps.push_back(Flag); | |||
3069 | ||||
3070 | X86ISD::NodeType opcode = X86ISD::RET_FLAG; | |||
3071 | if (CallConv == CallingConv::X86_INTR) | |||
3072 | opcode = X86ISD::IRET; | |||
3073 | return DAG.getNode(opcode, dl, MVT::Other, RetOps); | |||
3074 | } | |||
3075 | ||||
3076 | bool X86TargetLowering::isUsedByReturnOnly(SDNode *N, SDValue &Chain) const { | |||
3077 | if (N->getNumValues() != 1 || !N->hasNUsesOfValue(1, 0)) | |||
3078 | return false; | |||
3079 | ||||
3080 | SDValue TCChain = Chain; | |||
3081 | SDNode *Copy = *N->use_begin(); | |||
3082 | if (Copy->getOpcode() == ISD::CopyToReg) { | |||
3083 | // If the copy has a glue operand, we conservatively assume it isn't safe to | |||
3084 | // perform a tail call. | |||
3085 | if (Copy->getOperand(Copy->getNumOperands()-1).getValueType() == MVT::Glue) | |||
3086 | return false; | |||
3087 | TCChain = Copy->getOperand(0); | |||
3088 | } else if (Copy->getOpcode() != ISD::FP_EXTEND) | |||
3089 | return false; | |||
3090 | ||||
3091 | bool HasRet = false; | |||
3092 | for (SDNode::use_iterator UI = Copy->use_begin(), UE = Copy->use_end(); | |||
3093 | UI != UE; ++UI) { | |||
3094 | if (UI->getOpcode() != X86ISD::RET_FLAG) | |||
3095 | return false; | |||
3096 | // If we are returning more than one value, we can definitely | |||
3097 | // not make a tail call see PR19530 | |||
3098 | if (UI->getNumOperands() > 4) | |||
3099 | return false; | |||
3100 | if (UI->getNumOperands() == 4 && | |||
3101 | UI->getOperand(UI->getNumOperands()-1).getValueType() != MVT::Glue) | |||
3102 | return false; | |||
3103 | HasRet = true; | |||
3104 | } | |||
3105 | ||||
3106 | if (!HasRet) | |||
3107 | return false; | |||
3108 | ||||
3109 | Chain = TCChain; | |||
3110 | return true; | |||
3111 | } | |||
3112 | ||||
3113 | EVT X86TargetLowering::getTypeForExtReturn(LLVMContext &Context, EVT VT, | |||
3114 | ISD::NodeType ExtendKind) const { | |||
3115 | MVT ReturnMVT = MVT::i32; | |||
3116 | ||||
3117 | bool Darwin = Subtarget.getTargetTriple().isOSDarwin(); | |||
3118 | if (VT == MVT::i1 || (!Darwin && (VT == MVT::i8 || VT == MVT::i16))) { | |||
3119 | // The ABI does not require i1, i8 or i16 to be extended. | |||
3120 | // | |||
3121 | // On Darwin, there is code in the wild relying on Clang's old behaviour of | |||
3122 | // always extending i8/i16 return values, so keep doing that for now. | |||
3123 | // (PR26665). | |||
3124 | ReturnMVT = MVT::i8; | |||
3125 | } | |||
3126 | ||||
3127 | EVT MinVT = getRegisterType(Context, ReturnMVT); | |||
3128 | return VT.bitsLT(MinVT) ? MinVT : VT; | |||
3129 | } | |||
3130 | ||||
3131 | /// Reads two 32 bit registers and creates a 64 bit mask value. | |||
3132 | /// \param VA The current 32 bit value that need to be assigned. | |||
3133 | /// \param NextVA The next 32 bit value that need to be assigned. | |||
3134 | /// \param Root The parent DAG node. | |||
3135 | /// \param [in,out] InFlag Represents SDvalue in the parent DAG node for | |||
3136 | /// glue purposes. In the case the DAG is already using | |||
3137 | /// physical register instead of virtual, we should glue | |||
3138 | /// our new SDValue to InFlag SDvalue. | |||
3139 | /// \return a new SDvalue of size 64bit. | |||
3140 | static SDValue getv64i1Argument(CCValAssign &VA, CCValAssign &NextVA, | |||
3141 | SDValue &Root, SelectionDAG &DAG, | |||
3142 | const SDLoc &Dl, const X86Subtarget &Subtarget, | |||
3143 | SDValue *InFlag = nullptr) { | |||
3144 | assert((Subtarget.hasBWI()) && "Expected AVX512BW target!")(static_cast <bool> ((Subtarget.hasBWI()) && "Expected AVX512BW target!" ) ? void (0) : __assert_fail ("(Subtarget.hasBWI()) && \"Expected AVX512BW target!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 3144, __extension__ __PRETTY_FUNCTION__)); | |||
3145 | assert(Subtarget.is32Bit() && "Expecting 32 bit target")(static_cast <bool> (Subtarget.is32Bit() && "Expecting 32 bit target" ) ? void (0) : __assert_fail ("Subtarget.is32Bit() && \"Expecting 32 bit target\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 3145, __extension__ __PRETTY_FUNCTION__)); | |||
3146 | assert(VA.getValVT() == MVT::v64i1 &&(static_cast <bool> (VA.getValVT() == MVT::v64i1 && "Expecting first location of 64 bit width type") ? void (0) : __assert_fail ("VA.getValVT() == MVT::v64i1 && \"Expecting first location of 64 bit width type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 3147, __extension__ __PRETTY_FUNCTION__)) | |||
3147 | "Expecting first location of 64 bit width type")(static_cast <bool> (VA.getValVT() == MVT::v64i1 && "Expecting first location of 64 bit width type") ? void (0) : __assert_fail ("VA.getValVT() == MVT::v64i1 && \"Expecting first location of 64 bit width type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 3147, __extension__ __PRETTY_FUNCTION__)); | |||
3148 | assert(NextVA.getValVT() == VA.getValVT() &&(static_cast <bool> (NextVA.getValVT() == VA.getValVT() && "The locations should have the same type") ? void (0) : __assert_fail ("NextVA.getValVT() == VA.getValVT() && \"The locations should have the same type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 3149, __extension__ __PRETTY_FUNCTION__)) | |||
3149 | "The locations should have the same type")(static_cast <bool> (NextVA.getValVT() == VA.getValVT() && "The locations should have the same type") ? void (0) : __assert_fail ("NextVA.getValVT() == VA.getValVT() && \"The locations should have the same type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 3149, __extension__ __PRETTY_FUNCTION__)); | |||
3150 | assert(VA.isRegLoc() && NextVA.isRegLoc() &&(static_cast <bool> (VA.isRegLoc() && NextVA.isRegLoc () && "The values should reside in two registers") ? void (0) : __assert_fail ("VA.isRegLoc() && NextVA.isRegLoc() && \"The values should reside in two registers\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 3151, __extension__ __PRETTY_FUNCTION__)) | |||
3151 | "The values should reside in two registers")(static_cast <bool> (VA.isRegLoc() && NextVA.isRegLoc () && "The values should reside in two registers") ? void (0) : __assert_fail ("VA.isRegLoc() && NextVA.isRegLoc() && \"The values should reside in two registers\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 3151, __extension__ __PRETTY_FUNCTION__)); | |||
3152 | ||||
3153 | SDValue Lo, Hi; | |||
3154 | SDValue ArgValueLo, ArgValueHi; | |||
3155 | ||||
3156 | MachineFunction &MF = DAG.getMachineFunction(); | |||
3157 | const TargetRegisterClass *RC = &X86::GR32RegClass; | |||
3158 | ||||
3159 | // Read a 32 bit value from the registers. | |||
3160 | if (nullptr == InFlag) { | |||
3161 | // When no physical register is present, | |||
3162 | // create an intermediate virtual register. | |||
3163 | Register Reg = MF.addLiveIn(VA.getLocReg(), RC); | |||
3164 | ArgValueLo = DAG.getCopyFromReg(Root, Dl, Reg, MVT::i32); | |||
3165 | Reg = MF.addLiveIn(NextVA.getLocReg(), RC); | |||
3166 | ArgValueHi = DAG.getCopyFromReg(Root, Dl, Reg, MVT::i32); | |||
3167 | } else { | |||
3168 | // When a physical register is available read the value from it and glue | |||
3169 | // the reads together. | |||
3170 | ArgValueLo = | |||
3171 | DAG.getCopyFromReg(Root, Dl, VA.getLocReg(), MVT::i32, *InFlag); | |||
3172 | *InFlag = ArgValueLo.getValue(2); | |||
3173 | ArgValueHi = | |||
3174 | DAG.getCopyFromReg(Root, Dl, NextVA.getLocReg(), MVT::i32, *InFlag); | |||
3175 | *InFlag = ArgValueHi.getValue(2); | |||
3176 | } | |||
3177 | ||||
3178 | // Convert the i32 type into v32i1 type. | |||
3179 | Lo = DAG.getBitcast(MVT::v32i1, ArgValueLo); | |||
3180 | ||||
3181 | // Convert the i32 type into v32i1 type. | |||
3182 | Hi = DAG.getBitcast(MVT::v32i1, ArgValueHi); | |||
3183 | ||||
3184 | // Concatenate the two values together. | |||
3185 | return DAG.getNode(ISD::CONCAT_VECTORS, Dl, MVT::v64i1, Lo, Hi); | |||
3186 | } | |||
3187 | ||||
3188 | /// The function will lower a register of various sizes (8/16/32/64) | |||
3189 | /// to a mask value of the expected size (v8i1/v16i1/v32i1/v64i1) | |||
3190 | /// \returns a DAG node contains the operand after lowering to mask type. | |||
3191 | static SDValue lowerRegToMasks(const SDValue &ValArg, const EVT &ValVT, | |||
3192 | const EVT &ValLoc, const SDLoc &Dl, | |||
3193 | SelectionDAG &DAG) { | |||
3194 | SDValue ValReturned = ValArg; | |||
3195 | ||||
3196 | if (ValVT == MVT::v1i1) | |||
3197 | return DAG.getNode(ISD::SCALAR_TO_VECTOR, Dl, MVT::v1i1, ValReturned); | |||
3198 | ||||
3199 | if (ValVT == MVT::v64i1) { | |||
3200 | // In 32 bit machine, this case is handled by getv64i1Argument | |||
3201 | assert(ValLoc == MVT::i64 && "Expecting only i64 locations")(static_cast <bool> (ValLoc == MVT::i64 && "Expecting only i64 locations" ) ? void (0) : __assert_fail ("ValLoc == MVT::i64 && \"Expecting only i64 locations\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 3201, __extension__ __PRETTY_FUNCTION__)); | |||
3202 | // In 64 bit machine, There is no need to truncate the value only bitcast | |||
3203 | } else { | |||
3204 | MVT maskLen; | |||
3205 | switch (ValVT.getSimpleVT().SimpleTy) { | |||
3206 | case MVT::v8i1: | |||
3207 | maskLen = MVT::i8; | |||
3208 | break; | |||
3209 | case MVT::v16i1: | |||
3210 | maskLen = MVT::i16; | |||
3211 | break; | |||
3212 | case MVT::v32i1: | |||
3213 | maskLen = MVT::i32; | |||
3214 | break; | |||
3215 | default: | |||
3216 | llvm_unreachable("Expecting a vector of i1 types")::llvm::llvm_unreachable_internal("Expecting a vector of i1 types" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 3216); | |||
3217 | } | |||
3218 | ||||
3219 | ValReturned = DAG.getNode(ISD::TRUNCATE, Dl, maskLen, ValReturned); | |||
3220 | } | |||
3221 | return DAG.getBitcast(ValVT, ValReturned); | |||
3222 | } | |||
3223 | ||||
3224 | /// Lower the result values of a call into the | |||
3225 | /// appropriate copies out of appropriate physical registers. | |||
3226 | /// | |||
3227 | SDValue X86TargetLowering::LowerCallResult( | |||
3228 | SDValue Chain, SDValue InFlag, CallingConv::ID CallConv, bool isVarArg, | |||
3229 | const SmallVectorImpl<ISD::InputArg> &Ins, const SDLoc &dl, | |||
3230 | SelectionDAG &DAG, SmallVectorImpl<SDValue> &InVals, | |||
3231 | uint32_t *RegMask) const { | |||
3232 | ||||
3233 | const TargetRegisterInfo *TRI = Subtarget.getRegisterInfo(); | |||
3234 | // Assign locations to each value returned by this call. | |||
3235 | SmallVector<CCValAssign, 16> RVLocs; | |||
3236 | CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(), RVLocs, | |||
3237 | *DAG.getContext()); | |||
3238 | CCInfo.AnalyzeCallResult(Ins, RetCC_X86); | |||
3239 | ||||
3240 | // Copy all of the result registers out of their specified physreg. | |||
3241 | for (unsigned I = 0, InsIndex = 0, E = RVLocs.size(); I != E; | |||
3242 | ++I, ++InsIndex) { | |||
3243 | CCValAssign &VA = RVLocs[I]; | |||
3244 | EVT CopyVT = VA.getLocVT(); | |||
3245 | ||||
3246 | // In some calling conventions we need to remove the used registers | |||
3247 | // from the register mask. | |||
3248 | if (RegMask) { | |||
3249 | for (MCSubRegIterator SubRegs(VA.getLocReg(), TRI, /*IncludeSelf=*/true); | |||
3250 | SubRegs.isValid(); ++SubRegs) | |||
3251 | RegMask[*SubRegs / 32] &= ~(1u << (*SubRegs % 32)); | |||
3252 | } | |||
3253 | ||||
3254 | // Report an error if there was an attempt to return FP values via XMM | |||
3255 | // registers. | |||
3256 | if (!Subtarget.hasSSE1() && X86::FR32XRegClass.contains(VA.getLocReg())) { | |||
3257 | errorUnsupported(DAG, dl, "SSE register return with SSE disabled"); | |||
3258 | if (VA.getLocReg() == X86::XMM1) | |||
3259 | VA.convertToReg(X86::FP1); // Set reg to FP1, avoid hitting asserts. | |||
3260 | else | |||
3261 | VA.convertToReg(X86::FP0); // Set reg to FP0, avoid hitting asserts. | |||
3262 | } else if (!Subtarget.hasSSE2() && | |||
3263 | X86::FR64XRegClass.contains(VA.getLocReg()) && | |||
3264 | CopyVT == MVT::f64) { | |||
3265 | errorUnsupported(DAG, dl, "SSE2 register return with SSE2 disabled"); | |||
3266 | if (VA.getLocReg() == X86::XMM1) | |||
3267 | VA.convertToReg(X86::FP1); // Set reg to FP1, avoid hitting asserts. | |||
3268 | else | |||
3269 | VA.convertToReg(X86::FP0); // Set reg to FP0, avoid hitting asserts. | |||
3270 | } | |||
3271 | ||||
3272 | // If we prefer to use the value in xmm registers, copy it out as f80 and | |||
3273 | // use a truncate to move it from fp stack reg to xmm reg. | |||
3274 | bool RoundAfterCopy = false; | |||
3275 | if ((VA.getLocReg() == X86::FP0 || VA.getLocReg() == X86::FP1) && | |||
3276 | isScalarFPTypeInSSEReg(VA.getValVT())) { | |||
3277 | if (!Subtarget.hasX87()) | |||
3278 | report_fatal_error("X87 register return with X87 disabled"); | |||
3279 | CopyVT = MVT::f80; | |||
3280 | RoundAfterCopy = (CopyVT != VA.getLocVT()); | |||
3281 | } | |||
3282 | ||||
3283 | SDValue Val; | |||
3284 | if (VA.needsCustom()) { | |||
3285 | assert(VA.getValVT() == MVT::v64i1 &&(static_cast <bool> (VA.getValVT() == MVT::v64i1 && "Currently the only custom case is when we split v64i1 to 2 regs" ) ? void (0) : __assert_fail ("VA.getValVT() == MVT::v64i1 && \"Currently the only custom case is when we split v64i1 to 2 regs\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 3286, __extension__ __PRETTY_FUNCTION__)) | |||
3286 | "Currently the only custom case is when we split v64i1 to 2 regs")(static_cast <bool> (VA.getValVT() == MVT::v64i1 && "Currently the only custom case is when we split v64i1 to 2 regs" ) ? void (0) : __assert_fail ("VA.getValVT() == MVT::v64i1 && \"Currently the only custom case is when we split v64i1 to 2 regs\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 3286, __extension__ __PRETTY_FUNCTION__)); | |||
3287 | Val = | |||
3288 | getv64i1Argument(VA, RVLocs[++I], Chain, DAG, dl, Subtarget, &InFlag); | |||
3289 | } else { | |||
3290 | Chain = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), CopyVT, InFlag) | |||
3291 | .getValue(1); | |||
3292 | Val = Chain.getValue(0); | |||
3293 | InFlag = Chain.getValue(2); | |||
3294 | } | |||
3295 | ||||
3296 | if (RoundAfterCopy) | |||
3297 | Val = DAG.getNode(ISD::FP_ROUND, dl, VA.getValVT(), Val, | |||
3298 | // This truncation won't change the value. | |||
3299 | DAG.getIntPtrConstant(1, dl)); | |||
3300 | ||||
3301 | if (VA.isExtInLoc()) { | |||
3302 | if (VA.getValVT().isVector() && | |||
3303 | VA.getValVT().getScalarType() == MVT::i1 && | |||
3304 | ((VA.getLocVT() == MVT::i64) || (VA.getLocVT() == MVT::i32) || | |||
3305 | (VA.getLocVT() == MVT::i16) || (VA.getLocVT() == MVT::i8))) { | |||
3306 | // promoting a mask type (v*i1) into a register of type i64/i32/i16/i8 | |||
3307 | Val = lowerRegToMasks(Val, VA.getValVT(), VA.getLocVT(), dl, DAG); | |||
3308 | } else | |||
3309 | Val = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), Val); | |||
3310 | } | |||
3311 | ||||
3312 | if (VA.getLocInfo() == CCValAssign::BCvt) | |||
3313 | Val = DAG.getBitcast(VA.getValVT(), Val); | |||
3314 | ||||
3315 | InVals.push_back(Val); | |||
3316 | } | |||
3317 | ||||
3318 | return Chain; | |||
3319 | } | |||
3320 | ||||
3321 | //===----------------------------------------------------------------------===// | |||
3322 | // C & StdCall & Fast Calling Convention implementation | |||
3323 | //===----------------------------------------------------------------------===// | |||
3324 | // StdCall calling convention seems to be standard for many Windows' API | |||
3325 | // routines and around. It differs from C calling convention just a little: | |||
3326 | // callee should clean up the stack, not caller. Symbols should be also | |||
3327 | // decorated in some fancy way :) It doesn't support any vector arguments. | |||
3328 | // For info on fast calling convention see Fast Calling Convention (tail call) | |||
3329 | // implementation LowerX86_32FastCCCallTo. | |||
3330 | ||||
3331 | /// CallIsStructReturn - Determines whether a call uses struct return | |||
3332 | /// semantics. | |||
3333 | enum StructReturnType { | |||
3334 | NotStructReturn, | |||
3335 | RegStructReturn, | |||
3336 | StackStructReturn | |||
3337 | }; | |||
3338 | static StructReturnType | |||
3339 | callIsStructReturn(ArrayRef<ISD::OutputArg> Outs, bool IsMCU) { | |||
3340 | if (Outs.empty()) | |||
3341 | return NotStructReturn; | |||
3342 | ||||
3343 | const ISD::ArgFlagsTy &Flags = Outs[0].Flags; | |||
3344 | if (!Flags.isSRet()) | |||
3345 | return NotStructReturn; | |||
3346 | if (Flags.isInReg() || IsMCU) | |||
3347 | return RegStructReturn; | |||
3348 | return StackStructReturn; | |||
3349 | } | |||
3350 | ||||
3351 | /// Determines whether a function uses struct return semantics. | |||
3352 | static StructReturnType | |||
3353 | argsAreStructReturn(ArrayRef<ISD::InputArg> Ins, bool IsMCU) { | |||
3354 | if (Ins.empty()) | |||
3355 | return NotStructReturn; | |||
3356 | ||||
3357 | const ISD::ArgFlagsTy &Flags = Ins[0].Flags; | |||
3358 | if (!Flags.isSRet()) | |||
3359 | return NotStructReturn; | |||
3360 | if (Flags.isInReg() || IsMCU) | |||
3361 | return RegStructReturn; | |||
3362 | return StackStructReturn; | |||
3363 | } | |||
3364 | ||||
3365 | /// Make a copy of an aggregate at address specified by "Src" to address | |||
3366 | /// "Dst" with size and alignment information specified by the specific | |||
3367 | /// parameter attribute. The copy will be passed as a byval function parameter. | |||
3368 | static SDValue CreateCopyOfByValArgument(SDValue Src, SDValue Dst, | |||
3369 | SDValue Chain, ISD::ArgFlagsTy Flags, | |||
3370 | SelectionDAG &DAG, const SDLoc &dl) { | |||
3371 | SDValue SizeNode = DAG.getIntPtrConstant(Flags.getByValSize(), dl); | |||
3372 | ||||
3373 | return DAG.getMemcpy( | |||
3374 | Chain, dl, Dst, Src, SizeNode, Flags.getNonZeroByValAlign(), | |||
3375 | /*isVolatile*/ false, /*AlwaysInline=*/true, | |||
3376 | /*isTailCall*/ false, MachinePointerInfo(), MachinePointerInfo()); | |||
3377 | } | |||
3378 | ||||
3379 | /// Return true if the calling convention is one that we can guarantee TCO for. | |||
3380 | static bool canGuaranteeTCO(CallingConv::ID CC) { | |||
3381 | return (CC == CallingConv::Fast || CC == CallingConv::GHC || | |||
3382 | CC == CallingConv::X86_RegCall || CC == CallingConv::HiPE || | |||
3383 | CC == CallingConv::HHVM || CC == CallingConv::Tail || | |||
3384 | CC == CallingConv::SwiftTail); | |||
3385 | } | |||
3386 | ||||
3387 | /// Return true if we might ever do TCO for calls with this calling convention. | |||
3388 | static bool mayTailCallThisCC(CallingConv::ID CC) { | |||
3389 | switch (CC) { | |||
3390 | // C calling conventions: | |||
3391 | case CallingConv::C: | |||
3392 | case CallingConv::Win64: | |||
3393 | case CallingConv::X86_64_SysV: | |||
3394 | // Callee pop conventions: | |||
3395 | case CallingConv::X86_ThisCall: | |||
3396 | case CallingConv::X86_StdCall: | |||
3397 | case CallingConv::X86_VectorCall: | |||
3398 | case CallingConv::X86_FastCall: | |||
3399 | // Swift: | |||
3400 | case CallingConv::Swift: | |||
3401 | return true; | |||
3402 | default: | |||
3403 | return canGuaranteeTCO(CC); | |||
3404 | } | |||
3405 | } | |||
3406 | ||||
3407 | /// Return true if the function is being made into a tailcall target by | |||
3408 | /// changing its ABI. | |||
3409 | static bool shouldGuaranteeTCO(CallingConv::ID CC, bool GuaranteedTailCallOpt) { | |||
3410 | return (GuaranteedTailCallOpt && canGuaranteeTCO(CC)) || | |||
3411 | CC == CallingConv::Tail || CC == CallingConv::SwiftTail; | |||
3412 | } | |||
3413 | ||||
3414 | bool X86TargetLowering::mayBeEmittedAsTailCall(const CallInst *CI) const { | |||
3415 | if (!CI->isTailCall()) | |||
3416 | return false; | |||
3417 | ||||
3418 | CallingConv::ID CalleeCC = CI->getCallingConv(); | |||
3419 | if (!mayTailCallThisCC(CalleeCC)) | |||
3420 | return false; | |||
3421 | ||||
3422 | return true; | |||
3423 | } | |||
3424 | ||||
3425 | SDValue | |||
3426 | X86TargetLowering::LowerMemArgument(SDValue Chain, CallingConv::ID CallConv, | |||
3427 | const SmallVectorImpl<ISD::InputArg> &Ins, | |||
3428 | const SDLoc &dl, SelectionDAG &DAG, | |||
3429 | const CCValAssign &VA, | |||
3430 | MachineFrameInfo &MFI, unsigned i) const { | |||
3431 | // Create the nodes corresponding to a load from this parameter slot. | |||
3432 | ISD::ArgFlagsTy Flags = Ins[i].Flags; | |||
3433 | bool AlwaysUseMutable = shouldGuaranteeTCO( | |||
3434 | CallConv, DAG.getTarget().Options.GuaranteedTailCallOpt); | |||
3435 | bool isImmutable = !AlwaysUseMutable && !Flags.isByVal(); | |||
3436 | EVT ValVT; | |||
3437 | MVT PtrVT = getPointerTy(DAG.getDataLayout()); | |||
3438 | ||||
3439 | // If value is passed by pointer we have address passed instead of the value | |||
3440 | // itself. No need to extend if the mask value and location share the same | |||
3441 | // absolute size. | |||
3442 | bool ExtendedInMem = | |||
3443 | VA.isExtInLoc() && VA.getValVT().getScalarType() == MVT::i1 && | |||
3444 | VA.getValVT().getSizeInBits() != VA.getLocVT().getSizeInBits(); | |||
3445 | ||||
3446 | if (VA.getLocInfo() == CCValAssign::Indirect || ExtendedInMem) | |||
3447 | ValVT = VA.getLocVT(); | |||
3448 | else | |||
3449 | ValVT = VA.getValVT(); | |||
3450 | ||||
3451 | // FIXME: For now, all byval parameter objects are marked mutable. This can be | |||
3452 | // changed with more analysis. | |||
3453 | // In case of tail call optimization mark all arguments mutable. Since they | |||
3454 | // could be overwritten by lowering of arguments in case of a tail call. | |||
3455 | if (Flags.isByVal()) { | |||
3456 | unsigned Bytes = Flags.getByValSize(); | |||
3457 | if (Bytes == 0) Bytes = 1; // Don't create zero-sized stack objects. | |||
3458 | ||||
3459 | // FIXME: For now, all byval parameter objects are marked as aliasing. This | |||
3460 | // can be improved with deeper analysis. | |||
3461 | int FI = MFI.CreateFixedObject(Bytes, VA.getLocMemOffset(), isImmutable, | |||
3462 | /*isAliased=*/true); | |||
3463 | return DAG.getFrameIndex(FI, PtrVT); | |||
3464 | } | |||
3465 | ||||
3466 | EVT ArgVT = Ins[i].ArgVT; | |||
3467 | ||||
3468 | // If this is a vector that has been split into multiple parts, and the | |||
3469 | // scalar size of the parts don't match the vector element size, then we can't | |||
3470 | // elide the copy. The parts will have padding between them instead of being | |||
3471 | // packed like a vector. | |||
3472 | bool ScalarizedAndExtendedVector = | |||
3473 | ArgVT.isVector() && !VA.getLocVT().isVector() && | |||
3474 | VA.getLocVT().getSizeInBits() != ArgVT.getScalarSizeInBits(); | |||
3475 | ||||
3476 | // This is an argument in memory. We might be able to perform copy elision. | |||
3477 | // If the argument is passed directly in memory without any extension, then we | |||
3478 | // can perform copy elision. Large vector types, for example, may be passed | |||
3479 | // indirectly by pointer. | |||
3480 | if (Flags.isCopyElisionCandidate() && | |||
3481 | VA.getLocInfo() != CCValAssign::Indirect && !ExtendedInMem && | |||
3482 | !ScalarizedAndExtendedVector) { | |||
3483 | SDValue PartAddr; | |||
3484 | if (Ins[i].PartOffset == 0) { | |||
3485 | // If this is a one-part value or the first part of a multi-part value, | |||
3486 | // create a stack object for the entire argument value type and return a | |||
3487 | // load from our portion of it. This assumes that if the first part of an | |||
3488 | // argument is in memory, the rest will also be in memory. | |||
3489 | int FI = MFI.CreateFixedObject(ArgVT.getStoreSize(), VA.getLocMemOffset(), | |||
3490 | /*IsImmutable=*/false); | |||
3491 | PartAddr = DAG.getFrameIndex(FI, PtrVT); | |||
3492 | return DAG.getLoad( | |||
3493 | ValVT, dl, Chain, PartAddr, | |||
3494 | MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), FI)); | |||
3495 | } else { | |||
3496 | // This is not the first piece of an argument in memory. See if there is | |||
3497 | // already a fixed stack object including this offset. If so, assume it | |||
3498 | // was created by the PartOffset == 0 branch above and create a load from | |||
3499 | // the appropriate offset into it. | |||
3500 | int64_t PartBegin = VA.getLocMemOffset(); | |||
3501 | int64_t PartEnd = PartBegin + ValVT.getSizeInBits() / 8; | |||
3502 | int FI = MFI.getObjectIndexBegin(); | |||
3503 | for (; MFI.isFixedObjectIndex(FI); ++FI) { | |||
3504 | int64_t ObjBegin = MFI.getObjectOffset(FI); | |||
3505 | int64_t ObjEnd = ObjBegin + MFI.getObjectSize(FI); | |||
3506 | if (ObjBegin <= PartBegin && PartEnd <= ObjEnd) | |||
3507 | break; | |||
3508 | } | |||
3509 | if (MFI.isFixedObjectIndex(FI)) { | |||
3510 | SDValue Addr = | |||
3511 | DAG.getNode(ISD::ADD, dl, PtrVT, DAG.getFrameIndex(FI, PtrVT), | |||
3512 | DAG.getIntPtrConstant(Ins[i].PartOffset, dl)); | |||
3513 | return DAG.getLoad( | |||
3514 | ValVT, dl, Chain, Addr, | |||
3515 | MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), FI, | |||
3516 | Ins[i].PartOffset)); | |||
3517 | } | |||
3518 | } | |||
3519 | } | |||
3520 | ||||
3521 | int FI = MFI.CreateFixedObject(ValVT.getSizeInBits() / 8, | |||
3522 | VA.getLocMemOffset(), isImmutable); | |||
3523 | ||||
3524 | // Set SExt or ZExt flag. | |||
3525 | if (VA.getLocInfo() == CCValAssign::ZExt) { | |||
3526 | MFI.setObjectZExt(FI, true); | |||
3527 | } else if (VA.getLocInfo() == CCValAssign::SExt) { | |||
3528 | MFI.setObjectSExt(FI, true); | |||
3529 | } | |||
3530 | ||||
3531 | SDValue FIN = DAG.getFrameIndex(FI, PtrVT); | |||
3532 | SDValue Val = DAG.getLoad( | |||
3533 | ValVT, dl, Chain, FIN, | |||
3534 | MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), FI)); | |||
3535 | return ExtendedInMem | |||
3536 | ? (VA.getValVT().isVector() | |||
3537 | ? DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VA.getValVT(), Val) | |||
3538 | : DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), Val)) | |||
3539 | : Val; | |||
3540 | } | |||
3541 | ||||
3542 | // FIXME: Get this from tablegen. | |||
3543 | static ArrayRef<MCPhysReg> get64BitArgumentGPRs(CallingConv::ID CallConv, | |||
3544 | const X86Subtarget &Subtarget) { | |||
3545 | assert(Subtarget.is64Bit())(static_cast <bool> (Subtarget.is64Bit()) ? void (0) : __assert_fail ("Subtarget.is64Bit()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 3545, __extension__ __PRETTY_FUNCTION__)); | |||
3546 | ||||
3547 | if (Subtarget.isCallingConvWin64(CallConv)) { | |||
3548 | static const MCPhysReg GPR64ArgRegsWin64[] = { | |||
3549 | X86::RCX, X86::RDX, X86::R8, X86::R9 | |||
3550 | }; | |||
3551 | return makeArrayRef(std::begin(GPR64ArgRegsWin64), std::end(GPR64ArgRegsWin64)); | |||
3552 | } | |||
3553 | ||||
3554 | static const MCPhysReg GPR64ArgRegs64Bit[] = { | |||
3555 | X86::RDI, X86::RSI, X86::RDX, X86::RCX, X86::R8, X86::R9 | |||
3556 | }; | |||
3557 | return makeArrayRef(std::begin(GPR64ArgRegs64Bit), std::end(GPR64ArgRegs64Bit)); | |||
3558 | } | |||
3559 | ||||
3560 | // FIXME: Get this from tablegen. | |||
3561 | static ArrayRef<MCPhysReg> get64BitArgumentXMMs(MachineFunction &MF, | |||
3562 | CallingConv::ID CallConv, | |||
3563 | const X86Subtarget &Subtarget) { | |||
3564 | assert(Subtarget.is64Bit())(static_cast <bool> (Subtarget.is64Bit()) ? void (0) : __assert_fail ("Subtarget.is64Bit()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 3564, __extension__ __PRETTY_FUNCTION__)); | |||
3565 | if (Subtarget.isCallingConvWin64(CallConv)) { | |||
3566 | // The XMM registers which might contain var arg parameters are shadowed | |||
3567 | // in their paired GPR. So we only need to save the GPR to their home | |||
3568 | // slots. | |||
3569 | // TODO: __vectorcall will change this. | |||
3570 | return None; | |||
3571 | } | |||
3572 | ||||
3573 | bool isSoftFloat = Subtarget.useSoftFloat(); | |||
3574 | if (isSoftFloat || !Subtarget.hasSSE1()) | |||
3575 | // Kernel mode asks for SSE to be disabled, so there are no XMM argument | |||
3576 | // registers. | |||
3577 | return None; | |||
3578 | ||||
3579 | static const MCPhysReg XMMArgRegs64Bit[] = { | |||
3580 | X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3, | |||
3581 | X86::XMM4, X86::XMM5, X86::XMM6, X86::XMM7 | |||
3582 | }; | |||
3583 | return makeArrayRef(std::begin(XMMArgRegs64Bit), std::end(XMMArgRegs64Bit)); | |||
3584 | } | |||
3585 | ||||
3586 | #ifndef NDEBUG | |||
3587 | static bool isSortedByValueNo(ArrayRef<CCValAssign> ArgLocs) { | |||
3588 | return llvm::is_sorted( | |||
3589 | ArgLocs, [](const CCValAssign &A, const CCValAssign &B) -> bool { | |||
3590 | return A.getValNo() < B.getValNo(); | |||
3591 | }); | |||
3592 | } | |||
3593 | #endif | |||
3594 | ||||
3595 | namespace { | |||
3596 | /// This is a helper class for lowering variable arguments parameters. | |||
3597 | class VarArgsLoweringHelper { | |||
3598 | public: | |||
3599 | VarArgsLoweringHelper(X86MachineFunctionInfo *FuncInfo, const SDLoc &Loc, | |||
3600 | SelectionDAG &DAG, const X86Subtarget &Subtarget, | |||
3601 | CallingConv::ID CallConv, CCState &CCInfo) | |||
3602 | : FuncInfo(FuncInfo), DL(Loc), DAG(DAG), Subtarget(Subtarget), | |||
3603 | TheMachineFunction(DAG.getMachineFunction()), | |||
3604 | TheFunction(TheMachineFunction.getFunction()), | |||
3605 | FrameInfo(TheMachineFunction.getFrameInfo()), | |||
3606 | FrameLowering(*Subtarget.getFrameLowering()), | |||
3607 | TargLowering(DAG.getTargetLoweringInfo()), CallConv(CallConv), | |||
3608 | CCInfo(CCInfo) {} | |||
3609 | ||||
3610 | // Lower variable arguments parameters. | |||
3611 | void lowerVarArgsParameters(SDValue &Chain, unsigned StackSize); | |||
3612 | ||||
3613 | private: | |||
3614 | void createVarArgAreaAndStoreRegisters(SDValue &Chain, unsigned StackSize); | |||
3615 | ||||
3616 | void forwardMustTailParameters(SDValue &Chain); | |||
3617 | ||||
3618 | bool is64Bit() const { return Subtarget.is64Bit(); } | |||
3619 | bool isWin64() const { return Subtarget.isCallingConvWin64(CallConv); } | |||
3620 | ||||
3621 | X86MachineFunctionInfo *FuncInfo; | |||
3622 | const SDLoc &DL; | |||
3623 | SelectionDAG &DAG; | |||
3624 | const X86Subtarget &Subtarget; | |||
3625 | MachineFunction &TheMachineFunction; | |||
3626 | const Function &TheFunction; | |||
3627 | MachineFrameInfo &FrameInfo; | |||
3628 | const TargetFrameLowering &FrameLowering; | |||
3629 | const TargetLowering &TargLowering; | |||
3630 | CallingConv::ID CallConv; | |||
3631 | CCState &CCInfo; | |||
3632 | }; | |||
3633 | } // namespace | |||
3634 | ||||
3635 | void VarArgsLoweringHelper::createVarArgAreaAndStoreRegisters( | |||
3636 | SDValue &Chain, unsigned StackSize) { | |||
3637 | // If the function takes variable number of arguments, make a frame index for | |||
3638 | // the start of the first vararg value... for expansion of llvm.va_start. We | |||
3639 | // can skip this if there are no va_start calls. | |||
3640 | if (is64Bit() || (CallConv != CallingConv::X86_FastCall && | |||
3641 | CallConv != CallingConv::X86_ThisCall)) { | |||
3642 | FuncInfo->setVarArgsFrameIndex( | |||
3643 | FrameInfo.CreateFixedObject(1, StackSize, true)); | |||
3644 | } | |||
3645 | ||||
3646 | // 64-bit calling conventions support varargs and register parameters, so we | |||
3647 | // have to do extra work to spill them in the prologue. | |||
3648 | if (is64Bit()) { | |||
3649 | // Find the first unallocated argument registers. | |||
3650 | ArrayRef<MCPhysReg> ArgGPRs = get64BitArgumentGPRs(CallConv, Subtarget); | |||
3651 | ArrayRef<MCPhysReg> ArgXMMs = | |||
3652 | get64BitArgumentXMMs(TheMachineFunction, CallConv, Subtarget); | |||
3653 | unsigned NumIntRegs = CCInfo.getFirstUnallocated(ArgGPRs); | |||
3654 | unsigned NumXMMRegs = CCInfo.getFirstUnallocated(ArgXMMs); | |||
3655 | ||||
3656 | assert(!(NumXMMRegs && !Subtarget.hasSSE1()) &&(static_cast <bool> (!(NumXMMRegs && !Subtarget .hasSSE1()) && "SSE register cannot be used when SSE is disabled!" ) ? void (0) : __assert_fail ("!(NumXMMRegs && !Subtarget.hasSSE1()) && \"SSE register cannot be used when SSE is disabled!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 3657, __extension__ __PRETTY_FUNCTION__)) | |||
3657 | "SSE register cannot be used when SSE is disabled!")(static_cast <bool> (!(NumXMMRegs && !Subtarget .hasSSE1()) && "SSE register cannot be used when SSE is disabled!" ) ? void (0) : __assert_fail ("!(NumXMMRegs && !Subtarget.hasSSE1()) && \"SSE register cannot be used when SSE is disabled!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 3657, __extension__ __PRETTY_FUNCTION__)); | |||
3658 | ||||
3659 | if (isWin64()) { | |||
3660 | // Get to the caller-allocated home save location. Add 8 to account | |||
3661 | // for the return address. | |||
3662 | int HomeOffset = FrameLowering.getOffsetOfLocalArea() + 8; | |||
3663 | FuncInfo->setRegSaveFrameIndex( | |||
3664 | FrameInfo.CreateFixedObject(1, NumIntRegs * 8 + HomeOffset, false)); | |||
3665 | // Fixup to set vararg frame on shadow area (4 x i64). | |||
3666 | if (NumIntRegs < 4) | |||
3667 | FuncInfo->setVarArgsFrameIndex(FuncInfo->getRegSaveFrameIndex()); | |||
3668 | } else { | |||
3669 | // For X86-64, if there are vararg parameters that are passed via | |||
3670 | // registers, then we must store them to their spots on the stack so | |||
3671 | // they may be loaded by dereferencing the result of va_next. | |||
3672 | FuncInfo->setVarArgsGPOffset(NumIntRegs * 8); | |||
3673 | FuncInfo->setVarArgsFPOffset(ArgGPRs.size() * 8 + NumXMMRegs * 16); | |||
3674 | FuncInfo->setRegSaveFrameIndex(FrameInfo.CreateStackObject( | |||
3675 | ArgGPRs.size() * 8 + ArgXMMs.size() * 16, Align(16), false)); | |||
3676 | } | |||
3677 | ||||
3678 | SmallVector<SDValue, 6> | |||
3679 | LiveGPRs; // list of SDValue for GPR registers keeping live input value | |||
3680 | SmallVector<SDValue, 8> LiveXMMRegs; // list of SDValue for XMM registers | |||
3681 | // keeping live input value | |||
3682 | SDValue ALVal; // if applicable keeps SDValue for %al register | |||
3683 | ||||
3684 | // Gather all the live in physical registers. | |||
3685 | for (MCPhysReg Reg : ArgGPRs.slice(NumIntRegs)) { | |||
3686 | Register GPR = TheMachineFunction.addLiveIn(Reg, &X86::GR64RegClass); | |||
3687 | LiveGPRs.push_back(DAG.getCopyFromReg(Chain, DL, GPR, MVT::i64)); | |||
3688 | } | |||
3689 | const auto &AvailableXmms = ArgXMMs.slice(NumXMMRegs); | |||
3690 | if (!AvailableXmms.empty()) { | |||
3691 | Register AL = TheMachineFunction.addLiveIn(X86::AL, &X86::GR8RegClass); | |||
3692 | ALVal = DAG.getCopyFromReg(Chain, DL, AL, MVT::i8); | |||
3693 | for (MCPhysReg Reg : AvailableXmms) { | |||
3694 | // FastRegisterAllocator spills virtual registers at basic | |||
3695 | // block boundary. That leads to usages of xmm registers | |||
3696 | // outside of check for %al. Pass physical registers to | |||
3697 | // VASTART_SAVE_XMM_REGS to avoid unneccessary spilling. | |||
3698 | TheMachineFunction.getRegInfo().addLiveIn(Reg); | |||
3699 | LiveXMMRegs.push_back(DAG.getRegister(Reg, MVT::v4f32)); | |||
3700 | } | |||
3701 | } | |||
3702 | ||||
3703 | // Store the integer parameter registers. | |||
3704 | SmallVector<SDValue, 8> MemOps; | |||
3705 | SDValue RSFIN = | |||
3706 | DAG.getFrameIndex(FuncInfo->getRegSaveFrameIndex(), | |||
3707 | TargLowering.getPointerTy(DAG.getDataLayout())); | |||
3708 | unsigned Offset = FuncInfo->getVarArgsGPOffset(); | |||
3709 | for (SDValue Val : LiveGPRs) { | |||
3710 | SDValue FIN = DAG.getNode(ISD::ADD, DL, | |||
3711 | TargLowering.getPointerTy(DAG.getDataLayout()), | |||
3712 | RSFIN, DAG.getIntPtrConstant(Offset, DL)); | |||
3713 | SDValue Store = | |||
3714 | DAG.getStore(Val.getValue(1), DL, Val, FIN, | |||
3715 | MachinePointerInfo::getFixedStack( | |||
3716 | DAG.getMachineFunction(), | |||
3717 | FuncInfo->getRegSaveFrameIndex(), Offset)); | |||
3718 | MemOps.push_back(Store); | |||
3719 | Offset += 8; | |||
3720 | } | |||
3721 | ||||
3722 | // Now store the XMM (fp + vector) parameter registers. | |||
3723 | if (!LiveXMMRegs.empty()) { | |||
3724 | SmallVector<SDValue, 12> SaveXMMOps; | |||
3725 | SaveXMMOps.push_back(Chain); | |||
3726 | SaveXMMOps.push_back(ALVal); | |||
3727 | SaveXMMOps.push_back( | |||
3728 | DAG.getTargetConstant(FuncInfo->getRegSaveFrameIndex(), DL, MVT::i32)); | |||
3729 | SaveXMMOps.push_back( | |||
3730 | DAG.getTargetConstant(FuncInfo->getVarArgsFPOffset(), DL, MVT::i32)); | |||
3731 | llvm::append_range(SaveXMMOps, LiveXMMRegs); | |||
3732 | MemOps.push_back(DAG.getNode(X86ISD::VASTART_SAVE_XMM_REGS, DL, | |||
3733 | MVT::Other, SaveXMMOps)); | |||
3734 | } | |||
3735 | ||||
3736 | if (!MemOps.empty()) | |||
3737 | Chain = DAG.getNode(ISD::TokenFactor, DL, MVT::Other, MemOps); | |||
3738 | } | |||
3739 | } | |||
3740 | ||||
3741 | void VarArgsLoweringHelper::forwardMustTailParameters(SDValue &Chain) { | |||
3742 | // Find the largest legal vector type. | |||
3743 | MVT VecVT = MVT::Other; | |||
3744 | // FIXME: Only some x86_32 calling conventions support AVX512. | |||
3745 | if (Subtarget.useAVX512Regs() && | |||
3746 | (is64Bit() || (CallConv == CallingConv::X86_VectorCall || | |||
3747 | CallConv == CallingConv::Intel_OCL_BI))) | |||
3748 | VecVT = MVT::v16f32; | |||
3749 | else if (Subtarget.hasAVX()) | |||
3750 | VecVT = MVT::v8f32; | |||
3751 | else if (Subtarget.hasSSE2()) | |||
3752 | VecVT = MVT::v4f32; | |||
3753 | ||||
3754 | // We forward some GPRs and some vector types. | |||
3755 | SmallVector<MVT, 2> RegParmTypes; | |||
3756 | MVT IntVT = is64Bit() ? MVT::i64 : MVT::i32; | |||
3757 | RegParmTypes.push_back(IntVT); | |||
3758 | if (VecVT != MVT::Other) | |||
3759 | RegParmTypes.push_back(VecVT); | |||
3760 | ||||
3761 | // Compute the set of forwarded registers. The rest are scratch. | |||
3762 | SmallVectorImpl<ForwardedRegister> &Forwards = | |||
3763 | FuncInfo->getForwardedMustTailRegParms(); | |||
3764 | CCInfo.analyzeMustTailForwardedRegisters(Forwards, RegParmTypes, CC_X86); | |||
3765 | ||||
3766 | // Forward AL for SysV x86_64 targets, since it is used for varargs. | |||
3767 | if (is64Bit() && !isWin64() && !CCInfo.isAllocated(X86::AL)) { | |||
3768 | Register ALVReg = TheMachineFunction.addLiveIn(X86::AL, &X86::GR8RegClass); | |||
3769 | Forwards.push_back(ForwardedRegister(ALVReg, X86::AL, MVT::i8)); | |||
3770 | } | |||
3771 | ||||
3772 | // Copy all forwards from physical to virtual registers. | |||
3773 | for (ForwardedRegister &FR : Forwards) { | |||
3774 | // FIXME: Can we use a less constrained schedule? | |||
3775 | SDValue RegVal = DAG.getCopyFromReg(Chain, DL, FR.VReg, FR.VT); | |||
3776 | FR.VReg = TheMachineFunction.getRegInfo().createVirtualRegister( | |||
3777 | TargLowering.getRegClassFor(FR.VT)); | |||
3778 | Chain = DAG.getCopyToReg(Chain, DL, FR.VReg, RegVal); | |||
3779 | } | |||
3780 | } | |||
3781 | ||||
3782 | void VarArgsLoweringHelper::lowerVarArgsParameters(SDValue &Chain, | |||
3783 | unsigned StackSize) { | |||
3784 | // Set FrameIndex to the 0xAAAAAAA value to mark unset state. | |||
3785 | // If necessary, it would be set into the correct value later. | |||
3786 | FuncInfo->setVarArgsFrameIndex(0xAAAAAAA); | |||
3787 | FuncInfo->setRegSaveFrameIndex(0xAAAAAAA); | |||
3788 | ||||
3789 | if (FrameInfo.hasVAStart()) | |||
3790 | createVarArgAreaAndStoreRegisters(Chain, StackSize); | |||
3791 | ||||
3792 | if (FrameInfo.hasMustTailInVarArgFunc()) | |||
3793 | forwardMustTailParameters(Chain); | |||
3794 | } | |||
3795 | ||||
3796 | SDValue X86TargetLowering::LowerFormalArguments( | |||
3797 | SDValue Chain, CallingConv::ID CallConv, bool IsVarArg, | |||
3798 | const SmallVectorImpl<ISD::InputArg> &Ins, const SDLoc &dl, | |||
3799 | SelectionDAG &DAG, SmallVectorImpl<SDValue> &InVals) const { | |||
3800 | MachineFunction &MF = DAG.getMachineFunction(); | |||
3801 | X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>(); | |||
3802 | ||||
3803 | const Function &F = MF.getFunction(); | |||
3804 | if (F.hasExternalLinkage() && Subtarget.isTargetCygMing() && | |||
3805 | F.getName() == "main") | |||
3806 | FuncInfo->setForceFramePointer(true); | |||
3807 | ||||
3808 | MachineFrameInfo &MFI = MF.getFrameInfo(); | |||
3809 | bool Is64Bit = Subtarget.is64Bit(); | |||
3810 | bool IsWin64 = Subtarget.isCallingConvWin64(CallConv); | |||
3811 | ||||
3812 | assert((static_cast <bool> (!(IsVarArg && canGuaranteeTCO (CallConv)) && "Var args not supported with calling conv' regcall, fastcc, ghc or hipe" ) ? void (0) : __assert_fail ("!(IsVarArg && canGuaranteeTCO(CallConv)) && \"Var args not supported with calling conv' regcall, fastcc, ghc or hipe\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 3814, __extension__ __PRETTY_FUNCTION__)) | |||
3813 | !(IsVarArg && canGuaranteeTCO(CallConv)) &&(static_cast <bool> (!(IsVarArg && canGuaranteeTCO (CallConv)) && "Var args not supported with calling conv' regcall, fastcc, ghc or hipe" ) ? void (0) : __assert_fail ("!(IsVarArg && canGuaranteeTCO(CallConv)) && \"Var args not supported with calling conv' regcall, fastcc, ghc or hipe\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 3814, __extension__ __PRETTY_FUNCTION__)) | |||
3814 | "Var args not supported with calling conv' regcall, fastcc, ghc or hipe")(static_cast <bool> (!(IsVarArg && canGuaranteeTCO (CallConv)) && "Var args not supported with calling conv' regcall, fastcc, ghc or hipe" ) ? void (0) : __assert_fail ("!(IsVarArg && canGuaranteeTCO(CallConv)) && \"Var args not supported with calling conv' regcall, fastcc, ghc or hipe\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 3814, __extension__ __PRETTY_FUNCTION__)); | |||
3815 | ||||
3816 | // Assign locations to all of the incoming arguments. | |||
3817 | SmallVector<CCValAssign, 16> ArgLocs; | |||
3818 | CCState CCInfo(CallConv, IsVarArg, MF, ArgLocs, *DAG.getContext()); | |||
3819 | ||||
3820 | // Allocate shadow area for Win64. | |||
3821 | if (IsWin64) | |||
3822 | CCInfo.AllocateStack(32, Align(8)); | |||
3823 | ||||
3824 | CCInfo.AnalyzeArguments(Ins, CC_X86); | |||
3825 | ||||
3826 | // In vectorcall calling convention a second pass is required for the HVA | |||
3827 | // types. | |||
3828 | if (CallingConv::X86_VectorCall == CallConv) { | |||
3829 | CCInfo.AnalyzeArgumentsSecondPass(Ins, CC_X86); | |||
3830 | } | |||
3831 | ||||
3832 | // The next loop assumes that the locations are in the same order of the | |||
3833 | // input arguments. | |||
3834 | assert(isSortedByValueNo(ArgLocs) &&(static_cast <bool> (isSortedByValueNo(ArgLocs) && "Argument Location list must be sorted before lowering") ? void (0) : __assert_fail ("isSortedByValueNo(ArgLocs) && \"Argument Location list must be sorted before lowering\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 3835, __extension__ __PRETTY_FUNCTION__)) | |||
3835 | "Argument Location list must be sorted before lowering")(static_cast <bool> (isSortedByValueNo(ArgLocs) && "Argument Location list must be sorted before lowering") ? void (0) : __assert_fail ("isSortedByValueNo(ArgLocs) && \"Argument Location list must be sorted before lowering\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 3835, __extension__ __PRETTY_FUNCTION__)); | |||
3836 | ||||
3837 | SDValue ArgValue; | |||
3838 | for (unsigned I = 0, InsIndex = 0, E = ArgLocs.size(); I != E; | |||
3839 | ++I, ++InsIndex) { | |||
3840 | assert(InsIndex < Ins.size() && "Invalid Ins index")(static_cast <bool> (InsIndex < Ins.size() && "Invalid Ins index") ? void (0) : __assert_fail ("InsIndex < Ins.size() && \"Invalid Ins index\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 3840, __extension__ __PRETTY_FUNCTION__)); | |||
3841 | CCValAssign &VA = ArgLocs[I]; | |||
3842 | ||||
3843 | if (VA.isRegLoc()) { | |||
3844 | EVT RegVT = VA.getLocVT(); | |||
3845 | if (VA.needsCustom()) { | |||
3846 | assert((static_cast <bool> (VA.getValVT() == MVT::v64i1 && "Currently the only custom case is when we split v64i1 to 2 regs" ) ? void (0) : __assert_fail ("VA.getValVT() == MVT::v64i1 && \"Currently the only custom case is when we split v64i1 to 2 regs\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 3848, __extension__ __PRETTY_FUNCTION__)) | |||
3847 | VA.getValVT() == MVT::v64i1 &&(static_cast <bool> (VA.getValVT() == MVT::v64i1 && "Currently the only custom case is when we split v64i1 to 2 regs" ) ? void (0) : __assert_fail ("VA.getValVT() == MVT::v64i1 && \"Currently the only custom case is when we split v64i1 to 2 regs\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 3848, __extension__ __PRETTY_FUNCTION__)) | |||
3848 | "Currently the only custom case is when we split v64i1 to 2 regs")(static_cast <bool> (VA.getValVT() == MVT::v64i1 && "Currently the only custom case is when we split v64i1 to 2 regs" ) ? void (0) : __assert_fail ("VA.getValVT() == MVT::v64i1 && \"Currently the only custom case is when we split v64i1 to 2 regs\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 3848, __extension__ __PRETTY_FUNCTION__)); | |||
3849 | ||||
3850 | // v64i1 values, in regcall calling convention, that are | |||
3851 | // compiled to 32 bit arch, are split up into two registers. | |||
3852 | ArgValue = | |||
3853 | getv64i1Argument(VA, ArgLocs[++I], Chain, DAG, dl, Subtarget); | |||
3854 | } else { | |||
3855 | const TargetRegisterClass *RC; | |||
3856 | if (RegVT == MVT::i8) | |||
3857 | RC = &X86::GR8RegClass; | |||
3858 | else if (RegVT == MVT::i16) | |||
3859 | RC = &X86::GR16RegClass; | |||
3860 | else if (RegVT == MVT::i32) | |||
3861 | RC = &X86::GR32RegClass; | |||
3862 | else if (Is64Bit && RegVT == MVT::i64) | |||
3863 | RC = &X86::GR64RegClass; | |||
3864 | else if (RegVT == MVT::f16) | |||
3865 | RC = &X86::FR16XRegClass; | |||
3866 | else if (RegVT == MVT::f32) | |||
3867 | RC = Subtarget.hasAVX512() ? &X86::FR32XRegClass : &X86::FR32RegClass; | |||
3868 | else if (RegVT == MVT::f64) | |||
3869 | RC = Subtarget.hasAVX512() ? &X86::FR64XRegClass : &X86::FR64RegClass; | |||
3870 | else if (RegVT == MVT::f80) | |||
3871 | RC = &X86::RFP80RegClass; | |||
3872 | else if (RegVT == MVT::f128) | |||
3873 | RC = &X86::VR128RegClass; | |||
3874 | else if (RegVT.is512BitVector()) | |||
3875 | RC = &X86::VR512RegClass; | |||
3876 | else if (RegVT.is256BitVector()) | |||
3877 | RC = Subtarget.hasVLX() ? &X86::VR256XRegClass : &X86::VR256RegClass; | |||
3878 | else if (RegVT.is128BitVector()) | |||
3879 | RC = Subtarget.hasVLX() ? &X86::VR128XRegClass : &X86::VR128RegClass; | |||
3880 | else if (RegVT == MVT::x86mmx) | |||
3881 | RC = &X86::VR64RegClass; | |||
3882 | else if (RegVT == MVT::v1i1) | |||
3883 | RC = &X86::VK1RegClass; | |||
3884 | else if (RegVT == MVT::v8i1) | |||
3885 | RC = &X86::VK8RegClass; | |||
3886 | else if (RegVT == MVT::v16i1) | |||
3887 | RC = &X86::VK16RegClass; | |||
3888 | else if (RegVT == MVT::v32i1) | |||
3889 | RC = &X86::VK32RegClass; | |||
3890 | else if (RegVT == MVT::v64i1) | |||
3891 | RC = &X86::VK64RegClass; | |||
3892 | else | |||
3893 | llvm_unreachable("Unknown argument type!")::llvm::llvm_unreachable_internal("Unknown argument type!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 3893); | |||
3894 | ||||
3895 | Register Reg = MF.addLiveIn(VA.getLocReg(), RC); | |||
3896 | ArgValue = DAG.getCopyFromReg(Chain, dl, Reg, RegVT); | |||
3897 | } | |||
3898 | ||||
3899 | // If this is an 8 or 16-bit value, it is really passed promoted to 32 | |||
3900 | // bits. Insert an assert[sz]ext to capture this, then truncate to the | |||
3901 | // right size. | |||
3902 | if (VA.getLocInfo() == CCValAssign::SExt) | |||
3903 | ArgValue = DAG.getNode(ISD::AssertSext, dl, RegVT, ArgValue, | |||
3904 | DAG.getValueType(VA.getValVT())); | |||
3905 | else if (VA.getLocInfo() == CCValAssign::ZExt) | |||
3906 | ArgValue = DAG.getNode(ISD::AssertZext, dl, RegVT, ArgValue, | |||
3907 | DAG.getValueType(VA.getValVT())); | |||
3908 | else if (VA.getLocInfo() == CCValAssign::BCvt) | |||
3909 | ArgValue = DAG.getBitcast(VA.getValVT(), ArgValue); | |||
3910 | ||||
3911 | if (VA.isExtInLoc()) { | |||
3912 | // Handle MMX values passed in XMM regs. | |||
3913 | if (RegVT.isVector() && VA.getValVT().getScalarType() != MVT::i1) | |||
3914 | ArgValue = DAG.getNode(X86ISD::MOVDQ2Q, dl, VA.getValVT(), ArgValue); | |||
3915 | else if (VA.getValVT().isVector() && | |||
3916 | VA.getValVT().getScalarType() == MVT::i1 && | |||
3917 | ((VA.getLocVT() == MVT::i64) || (VA.getLocVT() == MVT::i32) || | |||
3918 | (VA.getLocVT() == MVT::i16) || (VA.getLocVT() == MVT::i8))) { | |||
3919 | // Promoting a mask type (v*i1) into a register of type i64/i32/i16/i8 | |||
3920 | ArgValue = lowerRegToMasks(ArgValue, VA.getValVT(), RegVT, dl, DAG); | |||
3921 | } else | |||
3922 | ArgValue = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), ArgValue); | |||
3923 | } | |||
3924 | } else { | |||
3925 | assert(VA.isMemLoc())(static_cast <bool> (VA.isMemLoc()) ? void (0) : __assert_fail ("VA.isMemLoc()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 3925, __extension__ __PRETTY_FUNCTION__)); | |||
3926 | ArgValue = | |||
3927 | LowerMemArgument(Chain, CallConv, Ins, dl, DAG, VA, MFI, InsIndex); | |||
3928 | } | |||
3929 | ||||
3930 | // If value is passed via pointer - do a load. | |||
3931 | if (VA.getLocInfo() == CCValAssign::Indirect && !Ins[I].Flags.isByVal()) | |||
3932 | ArgValue = | |||
3933 | DAG.getLoad(VA.getValVT(), dl, Chain, ArgValue, MachinePointerInfo()); | |||
3934 | ||||
3935 | InVals.push_back(ArgValue); | |||
3936 | } | |||
3937 | ||||
3938 | for (unsigned I = 0, E = Ins.size(); I != E; ++I) { | |||
3939 | if (Ins[I].Flags.isSwiftAsync()) { | |||
3940 | auto X86FI = MF.getInfo<X86MachineFunctionInfo>(); | |||
3941 | if (Subtarget.is64Bit()) | |||
3942 | X86FI->setHasSwiftAsyncContext(true); | |||
3943 | else { | |||
3944 | int FI = MF.getFrameInfo().CreateStackObject(4, Align(4), false); | |||
3945 | X86FI->setSwiftAsyncContextFrameIdx(FI); | |||
3946 | SDValue St = DAG.getStore(DAG.getEntryNode(), dl, InVals[I], | |||
3947 | DAG.getFrameIndex(FI, MVT::i32), | |||
3948 | MachinePointerInfo::getFixedStack(MF, FI)); | |||
3949 | Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, St, Chain); | |||
3950 | } | |||
3951 | } | |||
3952 | ||||
3953 | // Swift calling convention does not require we copy the sret argument | |||
3954 | // into %rax/%eax for the return. We don't set SRetReturnReg for Swift. | |||
3955 | if (CallConv == CallingConv::Swift || CallConv == CallingConv::SwiftTail) | |||
3956 | continue; | |||
3957 | ||||
3958 | // All x86 ABIs require that for returning structs by value we copy the | |||
3959 | // sret argument into %rax/%eax (depending on ABI) for the return. Save | |||
3960 | // the argument into a virtual register so that we can access it from the | |||
3961 | // return points. | |||
3962 | if (Ins[I].Flags.isSRet()) { | |||
3963 | assert(!FuncInfo->getSRetReturnReg() &&(static_cast <bool> (!FuncInfo->getSRetReturnReg() && "SRet return has already been set") ? void (0) : __assert_fail ("!FuncInfo->getSRetReturnReg() && \"SRet return has already been set\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 3964, __extension__ __PRETTY_FUNCTION__)) | |||
3964 | "SRet return has already been set")(static_cast <bool> (!FuncInfo->getSRetReturnReg() && "SRet return has already been set") ? void (0) : __assert_fail ("!FuncInfo->getSRetReturnReg() && \"SRet return has already been set\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 3964, __extension__ __PRETTY_FUNCTION__)); | |||
3965 | MVT PtrTy = getPointerTy(DAG.getDataLayout()); | |||
3966 | Register Reg = | |||
3967 | MF.getRegInfo().createVirtualRegister(getRegClassFor(PtrTy)); | |||
3968 | FuncInfo->setSRetReturnReg(Reg); | |||
3969 | SDValue Copy = DAG.getCopyToReg(DAG.getEntryNode(), dl, Reg, InVals[I]); | |||
3970 | Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Copy, Chain); | |||
3971 | break; | |||
3972 | } | |||
3973 | } | |||
3974 | ||||
3975 | unsigned StackSize = CCInfo.getNextStackOffset(); | |||
3976 | // Align stack specially for tail calls. | |||
3977 | if (shouldGuaranteeTCO(CallConv, | |||
3978 | MF.getTarget().Options.GuaranteedTailCallOpt)) | |||
3979 | StackSize = GetAlignedArgumentStackSize(StackSize, DAG); | |||
3980 | ||||
3981 | if (IsVarArg) | |||
3982 | VarArgsLoweringHelper(FuncInfo, dl, DAG, Subtarget, CallConv, CCInfo) | |||
3983 | .lowerVarArgsParameters(Chain, StackSize); | |||
3984 | ||||
3985 | // Some CCs need callee pop. | |||
3986 | if (X86::isCalleePop(CallConv, Is64Bit, IsVarArg, | |||
3987 | MF.getTarget().Options.GuaranteedTailCallOpt)) { | |||
3988 | FuncInfo->setBytesToPopOnReturn(StackSize); // Callee pops everything. | |||
3989 | } else if (CallConv == CallingConv::X86_INTR && Ins.size() == 2) { | |||
3990 | // X86 interrupts must pop the error code (and the alignment padding) if | |||
3991 | // present. | |||
3992 | FuncInfo->setBytesToPopOnReturn(Is64Bit ? 16 : 4); | |||
3993 | } else { | |||
3994 | FuncInfo->setBytesToPopOnReturn(0); // Callee pops nothing. | |||
3995 | // If this is an sret function, the return should pop the hidden pointer. | |||
3996 | if (!Is64Bit && !canGuaranteeTCO(CallConv) && | |||
3997 | !Subtarget.getTargetTriple().isOSMSVCRT() && | |||
3998 | argsAreStructReturn(Ins, Subtarget.isTargetMCU()) == StackStructReturn) | |||
3999 | FuncInfo->setBytesToPopOnReturn(4); | |||
4000 | } | |||
4001 | ||||
4002 | if (!Is64Bit) { | |||
4003 | // RegSaveFrameIndex is X86-64 only. | |||
4004 | FuncInfo->setRegSaveFrameIndex(0xAAAAAAA); | |||
4005 | } | |||
4006 | ||||
4007 | FuncInfo->setArgumentStackSize(StackSize); | |||
4008 | ||||
4009 | if (WinEHFuncInfo *EHInfo = MF.getWinEHFuncInfo()) { | |||
4010 | EHPersonality Personality = classifyEHPersonality(F.getPersonalityFn()); | |||
4011 | if (Personality == EHPersonality::CoreCLR) { | |||
4012 | assert(Is64Bit)(static_cast <bool> (Is64Bit) ? void (0) : __assert_fail ("Is64Bit", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 4012, __extension__ __PRETTY_FUNCTION__)); | |||
4013 | // TODO: Add a mechanism to frame lowering that will allow us to indicate | |||
4014 | // that we'd prefer this slot be allocated towards the bottom of the frame | |||
4015 | // (i.e. near the stack pointer after allocating the frame). Every | |||
4016 | // funclet needs a copy of this slot in its (mostly empty) frame, and the | |||
4017 | // offset from the bottom of this and each funclet's frame must be the | |||
4018 | // same, so the size of funclets' (mostly empty) frames is dictated by | |||
4019 | // how far this slot is from the bottom (since they allocate just enough | |||
4020 | // space to accommodate holding this slot at the correct offset). | |||
4021 | int PSPSymFI = MFI.CreateStackObject(8, Align(8), /*isSpillSlot=*/false); | |||
4022 | EHInfo->PSPSymFrameIdx = PSPSymFI; | |||
4023 | } | |||
4024 | } | |||
4025 | ||||
4026 | if (CallConv == CallingConv::X86_RegCall || | |||
4027 | F.hasFnAttribute("no_caller_saved_registers")) { | |||
4028 | MachineRegisterInfo &MRI = MF.getRegInfo(); | |||
4029 | for (std::pair<Register, Register> Pair : MRI.liveins()) | |||
4030 | MRI.disableCalleeSavedRegister(Pair.first); | |||
4031 | } | |||
4032 | ||||
4033 | return Chain; | |||
4034 | } | |||
4035 | ||||
4036 | SDValue X86TargetLowering::LowerMemOpCallTo(SDValue Chain, SDValue StackPtr, | |||
4037 | SDValue Arg, const SDLoc &dl, | |||
4038 | SelectionDAG &DAG, | |||
4039 | const CCValAssign &VA, | |||
4040 | ISD::ArgFlagsTy Flags, | |||
4041 | bool isByVal) const { | |||
4042 | unsigned LocMemOffset = VA.getLocMemOffset(); | |||
4043 | SDValue PtrOff = DAG.getIntPtrConstant(LocMemOffset, dl); | |||
4044 | PtrOff = DAG.getNode(ISD::ADD, dl, getPointerTy(DAG.getDataLayout()), | |||
4045 | StackPtr, PtrOff); | |||
4046 | if (isByVal) | |||
4047 | return CreateCopyOfByValArgument(Arg, PtrOff, Chain, Flags, DAG, dl); | |||
4048 | ||||
4049 | return DAG.getStore( | |||
4050 | Chain, dl, Arg, PtrOff, | |||
4051 | MachinePointerInfo::getStack(DAG.getMachineFunction(), LocMemOffset)); | |||
4052 | } | |||
4053 | ||||
4054 | /// Emit a load of return address if tail call | |||
4055 | /// optimization is performed and it is required. | |||
4056 | SDValue X86TargetLowering::EmitTailCallLoadRetAddr( | |||
4057 | SelectionDAG &DAG, SDValue &OutRetAddr, SDValue Chain, bool IsTailCall, | |||
4058 | bool Is64Bit, int FPDiff, const SDLoc &dl) const { | |||
4059 | // Adjust the Return address stack slot. | |||
4060 | EVT VT = getPointerTy(DAG.getDataLayout()); | |||
4061 | OutRetAddr = getReturnAddressFrameIndex(DAG); | |||
4062 | ||||
4063 | // Load the "old" Return address. | |||
4064 | OutRetAddr = DAG.getLoad(VT, dl, Chain, OutRetAddr, MachinePointerInfo()); | |||
4065 | return SDValue(OutRetAddr.getNode(), 1); | |||
4066 | } | |||
4067 | ||||
4068 | /// Emit a store of the return address if tail call | |||
4069 | /// optimization is performed and it is required (FPDiff!=0). | |||
4070 | static SDValue EmitTailCallStoreRetAddr(SelectionDAG &DAG, MachineFunction &MF, | |||
4071 | SDValue Chain, SDValue RetAddrFrIdx, | |||
4072 | EVT PtrVT, unsigned SlotSize, | |||
4073 | int FPDiff, const SDLoc &dl) { | |||
4074 | // Store the return address to the appropriate stack slot. | |||
4075 | if (!FPDiff) return Chain; | |||
4076 | // Calculate the new stack slot for the return address. | |||
4077 | int NewReturnAddrFI = | |||
4078 | MF.getFrameInfo().CreateFixedObject(SlotSize, (int64_t)FPDiff - SlotSize, | |||
4079 | false); | |||
4080 | SDValue NewRetAddrFrIdx = DAG.getFrameIndex(NewReturnAddrFI, PtrVT); | |||
4081 | Chain = DAG.getStore(Chain, dl, RetAddrFrIdx, NewRetAddrFrIdx, | |||
4082 | MachinePointerInfo::getFixedStack( | |||
4083 | DAG.getMachineFunction(), NewReturnAddrFI)); | |||
4084 | return Chain; | |||
4085 | } | |||
4086 | ||||
4087 | /// Returns a vector_shuffle mask for an movs{s|d}, movd | |||
4088 | /// operation of specified width. | |||
4089 | static SDValue getMOVL(SelectionDAG &DAG, const SDLoc &dl, MVT VT, SDValue V1, | |||
4090 | SDValue V2) { | |||
4091 | unsigned NumElems = VT.getVectorNumElements(); | |||
4092 | SmallVector<int, 8> Mask; | |||
4093 | Mask.push_back(NumElems); | |||
4094 | for (unsigned i = 1; i != NumElems; ++i) | |||
4095 | Mask.push_back(i); | |||
4096 | return DAG.getVectorShuffle(VT, dl, V1, V2, Mask); | |||
4097 | } | |||
4098 | ||||
4099 | SDValue | |||
4100 | X86TargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI, | |||
4101 | SmallVectorImpl<SDValue> &InVals) const { | |||
4102 | SelectionDAG &DAG = CLI.DAG; | |||
4103 | SDLoc &dl = CLI.DL; | |||
4104 | SmallVectorImpl<ISD::OutputArg> &Outs = CLI.Outs; | |||
4105 | SmallVectorImpl<SDValue> &OutVals = CLI.OutVals; | |||
4106 | SmallVectorImpl<ISD::InputArg> &Ins = CLI.Ins; | |||
4107 | SDValue Chain = CLI.Chain; | |||
4108 | SDValue Callee = CLI.Callee; | |||
4109 | CallingConv::ID CallConv = CLI.CallConv; | |||
4110 | bool &isTailCall = CLI.IsTailCall; | |||
4111 | bool isVarArg = CLI.IsVarArg; | |||
4112 | const auto *CB = CLI.CB; | |||
4113 | ||||
4114 | MachineFunction &MF = DAG.getMachineFunction(); | |||
4115 | bool Is64Bit = Subtarget.is64Bit(); | |||
4116 | bool IsWin64 = Subtarget.isCallingConvWin64(CallConv); | |||
4117 | StructReturnType SR = callIsStructReturn(Outs, Subtarget.isTargetMCU()); | |||
4118 | bool IsSibcall = false; | |||
4119 | bool IsGuaranteeTCO = MF.getTarget().Options.GuaranteedTailCallOpt || | |||
4120 | CallConv == CallingConv::Tail || CallConv == CallingConv::SwiftTail; | |||
4121 | X86MachineFunctionInfo *X86Info = MF.getInfo<X86MachineFunctionInfo>(); | |||
4122 | bool HasNCSR = (CB && isa<CallInst>(CB) && | |||
4123 | CB->hasFnAttr("no_caller_saved_registers")); | |||
4124 | bool HasNoCfCheck = (CB && CB->doesNoCfCheck()); | |||
4125 | bool IsIndirectCall = (CB && isa<CallInst>(CB) && CB->isIndirectCall()); | |||
4126 | const Module *M = MF.getMMI().getModule(); | |||
4127 | Metadata *IsCFProtectionSupported = M->getModuleFlag("cf-protection-branch"); | |||
4128 | ||||
4129 | MachineFunction::CallSiteInfo CSInfo; | |||
4130 | if (CallConv == CallingConv::X86_INTR) | |||
4131 | report_fatal_error("X86 interrupts may not be called directly"); | |||
4132 | ||||
4133 | bool IsMustTail = CLI.CB && CLI.CB->isMustTailCall(); | |||
4134 | if (Subtarget.isPICStyleGOT() && !IsGuaranteeTCO && !IsMustTail) { | |||
4135 | // If we are using a GOT, disable tail calls to external symbols with | |||
4136 | // default visibility. Tail calling such a symbol requires using a GOT | |||
4137 | // relocation, which forces early binding of the symbol. This breaks code | |||
4138 | // that require lazy function symbol resolution. Using musttail or | |||
4139 | // GuaranteedTailCallOpt will override this. | |||
4140 | GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee); | |||
4141 | if (!G || (!G->getGlobal()->hasLocalLinkage() && | |||
4142 | G->getGlobal()->hasDefaultVisibility())) | |||
4143 | isTailCall = false; | |||
4144 | } | |||
4145 | ||||
4146 | ||||
4147 | if (isTailCall && !IsMustTail) { | |||
4148 | // Check if it's really possible to do a tail call. | |||
4149 | isTailCall = IsEligibleForTailCallOptimization( | |||
4150 | Callee, CallConv, SR == StackStructReturn, isVarArg, CLI.RetTy, Outs, | |||
4151 | OutVals, Ins, DAG); | |||
4152 | ||||
4153 | // Sibcalls are automatically detected tailcalls which do not require | |||
4154 | // ABI changes. | |||
4155 | if (!IsGuaranteeTCO && isTailCall) | |||
4156 | IsSibcall = true; | |||
4157 | ||||
4158 | if (isTailCall) | |||
4159 | ++NumTailCalls; | |||
4160 | } | |||
4161 | ||||
4162 | if (IsMustTail && !isTailCall) | |||
4163 | report_fatal_error("failed to perform tail call elimination on a call " | |||
4164 | "site marked musttail"); | |||
4165 | ||||
4166 | assert(!(isVarArg && canGuaranteeTCO(CallConv)) &&(static_cast <bool> (!(isVarArg && canGuaranteeTCO (CallConv)) && "Var args not supported with calling convention fastcc, ghc or hipe" ) ? void (0) : __assert_fail ("!(isVarArg && canGuaranteeTCO(CallConv)) && \"Var args not supported with calling convention fastcc, ghc or hipe\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 4167, __extension__ __PRETTY_FUNCTION__)) | |||
4167 | "Var args not supported with calling convention fastcc, ghc or hipe")(static_cast <bool> (!(isVarArg && canGuaranteeTCO (CallConv)) && "Var args not supported with calling convention fastcc, ghc or hipe" ) ? void (0) : __assert_fail ("!(isVarArg && canGuaranteeTCO(CallConv)) && \"Var args not supported with calling convention fastcc, ghc or hipe\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 4167, __extension__ __PRETTY_FUNCTION__)); | |||
4168 | ||||
4169 | // Analyze operands of the call, assigning locations to each operand. | |||
4170 | SmallVector<CCValAssign, 16> ArgLocs; | |||
4171 | CCState CCInfo(CallConv, isVarArg, MF, ArgLocs, *DAG.getContext()); | |||
4172 | ||||
4173 | // Allocate shadow area for Win64. | |||
4174 | if (IsWin64) | |||
4175 | CCInfo.AllocateStack(32, Align(8)); | |||
4176 | ||||
4177 | CCInfo.AnalyzeArguments(Outs, CC_X86); | |||
4178 | ||||
4179 | // In vectorcall calling convention a second pass is required for the HVA | |||
4180 | // types. | |||
4181 | if (CallingConv::X86_VectorCall == CallConv) { | |||
4182 | CCInfo.AnalyzeArgumentsSecondPass(Outs, CC_X86); | |||
4183 | } | |||
4184 | ||||
4185 | // Get a count of how many bytes are to be pushed on the stack. | |||
4186 | unsigned NumBytes = CCInfo.getAlignedCallFrameSize(); | |||
4187 | if (IsSibcall) | |||
4188 | // This is a sibcall. The memory operands are available in caller's | |||
4189 | // own caller's stack. | |||
4190 | NumBytes = 0; | |||
4191 | else if (IsGuaranteeTCO && canGuaranteeTCO(CallConv)) | |||
4192 | NumBytes = GetAlignedArgumentStackSize(NumBytes, DAG); | |||
4193 | ||||
4194 | int FPDiff = 0; | |||
4195 | if (isTailCall && | |||
4196 | shouldGuaranteeTCO(CallConv, | |||
4197 | MF.getTarget().Options.GuaranteedTailCallOpt)) { | |||
4198 | // Lower arguments at fp - stackoffset + fpdiff. | |||
4199 | unsigned NumBytesCallerPushed = X86Info->getBytesToPopOnReturn(); | |||
4200 | ||||
4201 | FPDiff = NumBytesCallerPushed - NumBytes; | |||
4202 | ||||
4203 | // Set the delta of movement of the returnaddr stackslot. | |||
4204 | // But only set if delta is greater than previous delta. | |||
4205 | if (FPDiff < X86Info->getTCReturnAddrDelta()) | |||
4206 | X86Info->setTCReturnAddrDelta(FPDiff); | |||
4207 | } | |||
4208 | ||||
4209 | unsigned NumBytesToPush = NumBytes; | |||
4210 | unsigned NumBytesToPop = NumBytes; | |||
4211 | ||||
4212 | // If we have an inalloca argument, all stack space has already been allocated | |||
4213 | // for us and be right at the top of the stack. We don't support multiple | |||
4214 | // arguments passed in memory when using inalloca. | |||
4215 | if (!Outs.empty() && Outs.back().Flags.isInAlloca()) { | |||
4216 | NumBytesToPush = 0; | |||
4217 | if (!ArgLocs.back().isMemLoc()) | |||
4218 | report_fatal_error("cannot use inalloca attribute on a register " | |||
4219 | "parameter"); | |||
4220 | if (ArgLocs.back().getLocMemOffset() != 0) | |||
4221 | report_fatal_error("any parameter with the inalloca attribute must be " | |||
4222 | "the only memory argument"); | |||
4223 | } else if (CLI.IsPreallocated) { | |||
4224 | assert(ArgLocs.back().isMemLoc() &&(static_cast <bool> (ArgLocs.back().isMemLoc() && "cannot use preallocated attribute on a register " "parameter" ) ? void (0) : __assert_fail ("ArgLocs.back().isMemLoc() && \"cannot use preallocated attribute on a register \" \"parameter\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 4226, __extension__ __PRETTY_FUNCTION__)) | |||
4225 | "cannot use preallocated attribute on a register "(static_cast <bool> (ArgLocs.back().isMemLoc() && "cannot use preallocated attribute on a register " "parameter" ) ? void (0) : __assert_fail ("ArgLocs.back().isMemLoc() && \"cannot use preallocated attribute on a register \" \"parameter\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 4226, __extension__ __PRETTY_FUNCTION__)) | |||
4226 | "parameter")(static_cast <bool> (ArgLocs.back().isMemLoc() && "cannot use preallocated attribute on a register " "parameter" ) ? void (0) : __assert_fail ("ArgLocs.back().isMemLoc() && \"cannot use preallocated attribute on a register \" \"parameter\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 4226, __extension__ __PRETTY_FUNCTION__)); | |||
4227 | SmallVector<size_t, 4> PreallocatedOffsets; | |||
4228 | for (size_t i = 0; i < CLI.OutVals.size(); ++i) { | |||
4229 | if (CLI.CB->paramHasAttr(i, Attribute::Preallocated)) { | |||
4230 | PreallocatedOffsets.push_back(ArgLocs[i].getLocMemOffset()); | |||
4231 | } | |||
4232 | } | |||
4233 | auto *MFI = DAG.getMachineFunction().getInfo<X86MachineFunctionInfo>(); | |||
4234 | size_t PreallocatedId = MFI->getPreallocatedIdForCallSite(CLI.CB); | |||
4235 | MFI->setPreallocatedStackSize(PreallocatedId, NumBytes); | |||
4236 | MFI->setPreallocatedArgOffsets(PreallocatedId, PreallocatedOffsets); | |||
4237 | NumBytesToPush = 0; | |||
4238 | } | |||
4239 | ||||
4240 | if (!IsSibcall && !IsMustTail) | |||
4241 | Chain = DAG.getCALLSEQ_START(Chain, NumBytesToPush, | |||
4242 | NumBytes - NumBytesToPush, dl); | |||
4243 | ||||
4244 | SDValue RetAddrFrIdx; | |||
4245 | // Load return address for tail calls. | |||
4246 | if (isTailCall && FPDiff) | |||
4247 | Chain = EmitTailCallLoadRetAddr(DAG, RetAddrFrIdx, Chain, isTailCall, | |||
4248 | Is64Bit, FPDiff, dl); | |||
4249 | ||||
4250 | SmallVector<std::pair<Register, SDValue>, 8> RegsToPass; | |||
4251 | SmallVector<SDValue, 8> MemOpChains; | |||
4252 | SDValue StackPtr; | |||
4253 | ||||
4254 | // The next loop assumes that the locations are in the same order of the | |||
4255 | // input arguments. | |||
4256 | assert(isSortedByValueNo(ArgLocs) &&(static_cast <bool> (isSortedByValueNo(ArgLocs) && "Argument Location list must be sorted before lowering") ? void (0) : __assert_fail ("isSortedByValueNo(ArgLocs) && \"Argument Location list must be sorted before lowering\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 4257, __extension__ __PRETTY_FUNCTION__)) | |||
4257 | "Argument Location list must be sorted before lowering")(static_cast <bool> (isSortedByValueNo(ArgLocs) && "Argument Location list must be sorted before lowering") ? void (0) : __assert_fail ("isSortedByValueNo(ArgLocs) && \"Argument Location list must be sorted before lowering\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 4257, __extension__ __PRETTY_FUNCTION__)); | |||
4258 | ||||
4259 | // Walk the register/memloc assignments, inserting copies/loads. In the case | |||
4260 | // of tail call optimization arguments are handle later. | |||
4261 | const X86RegisterInfo *RegInfo = Subtarget.getRegisterInfo(); | |||
4262 | for (unsigned I = 0, OutIndex = 0, E = ArgLocs.size(); I != E; | |||
4263 | ++I, ++OutIndex) { | |||
4264 | assert(OutIndex < Outs.size() && "Invalid Out index")(static_cast <bool> (OutIndex < Outs.size() && "Invalid Out index") ? void (0) : __assert_fail ("OutIndex < Outs.size() && \"Invalid Out index\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 4264, __extension__ __PRETTY_FUNCTION__)); | |||
4265 | // Skip inalloca/preallocated arguments, they have already been written. | |||
4266 | ISD::ArgFlagsTy Flags = Outs[OutIndex].Flags; | |||
4267 | if (Flags.isInAlloca() || Flags.isPreallocated()) | |||
4268 | continue; | |||
4269 | ||||
4270 | CCValAssign &VA = ArgLocs[I]; | |||
4271 | EVT RegVT = VA.getLocVT(); | |||
4272 | SDValue Arg = OutVals[OutIndex]; | |||
4273 | bool isByVal = Flags.isByVal(); | |||
4274 | ||||
4275 | // Promote the value if needed. | |||
4276 | switch (VA.getLocInfo()) { | |||
4277 | default: llvm_unreachable("Unknown loc info!")::llvm::llvm_unreachable_internal("Unknown loc info!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 4277); | |||
4278 | case CCValAssign::Full: break; | |||
4279 | case CCValAssign::SExt: | |||
4280 | Arg = DAG.getNode(ISD::SIGN_EXTEND, dl, RegVT, Arg); | |||
4281 | break; | |||
4282 | case CCValAssign::ZExt: | |||
4283 | Arg = DAG.getNode(ISD::ZERO_EXTEND, dl, RegVT, Arg); | |||
4284 | break; | |||
4285 | case CCValAssign::AExt: | |||
4286 | if (Arg.getValueType().isVector() && | |||
4287 | Arg.getValueType().getVectorElementType() == MVT::i1) | |||
4288 | Arg = lowerMasksToReg(Arg, RegVT, dl, DAG); | |||
4289 | else if (RegVT.is128BitVector()) { | |||
4290 | // Special case: passing MMX values in XMM registers. | |||
4291 | Arg = DAG.getBitcast(MVT::i64, Arg); | |||
4292 | Arg = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2i64, Arg); | |||
4293 | Arg = getMOVL(DAG, dl, MVT::v2i64, DAG.getUNDEF(MVT::v2i64), Arg); | |||
4294 | } else | |||
4295 | Arg = DAG.getNode(ISD::ANY_EXTEND, dl, RegVT, Arg); | |||
4296 | break; | |||
4297 | case CCValAssign::BCvt: | |||
4298 | Arg = DAG.getBitcast(RegVT, Arg); | |||
4299 | break; | |||
4300 | case CCValAssign::Indirect: { | |||
4301 | if (isByVal) { | |||
4302 | // Memcpy the argument to a temporary stack slot to prevent | |||
4303 | // the caller from seeing any modifications the callee may make | |||
4304 | // as guaranteed by the `byval` attribute. | |||
4305 | int FrameIdx = MF.getFrameInfo().CreateStackObject( | |||
4306 | Flags.getByValSize(), | |||
4307 | std::max(Align(16), Flags.getNonZeroByValAlign()), false); | |||
4308 | SDValue StackSlot = | |||
4309 | DAG.getFrameIndex(FrameIdx, getPointerTy(DAG.getDataLayout())); | |||
4310 | Chain = | |||
4311 | CreateCopyOfByValArgument(Arg, StackSlot, Chain, Flags, DAG, dl); | |||
4312 | // From now on treat this as a regular pointer | |||
4313 | Arg = StackSlot; | |||
4314 | isByVal = false; | |||
4315 | } else { | |||
4316 | // Store the argument. | |||
4317 | SDValue SpillSlot = DAG.CreateStackTemporary(VA.getValVT()); | |||
4318 | int FI = cast<FrameIndexSDNode>(SpillSlot)->getIndex(); | |||
4319 | Chain = DAG.getStore( | |||
4320 | Chain, dl, Arg, SpillSlot, | |||
4321 | MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), FI)); | |||
4322 | Arg = SpillSlot; | |||
4323 | } | |||
4324 | break; | |||
4325 | } | |||
4326 | } | |||
4327 | ||||
4328 | if (VA.needsCustom()) { | |||
4329 | assert(VA.getValVT() == MVT::v64i1 &&(static_cast <bool> (VA.getValVT() == MVT::v64i1 && "Currently the only custom case is when we split v64i1 to 2 regs" ) ? void (0) : __assert_fail ("VA.getValVT() == MVT::v64i1 && \"Currently the only custom case is when we split v64i1 to 2 regs\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 4330, __extension__ __PRETTY_FUNCTION__)) | |||
4330 | "Currently the only custom case is when we split v64i1 to 2 regs")(static_cast <bool> (VA.getValVT() == MVT::v64i1 && "Currently the only custom case is when we split v64i1 to 2 regs" ) ? void (0) : __assert_fail ("VA.getValVT() == MVT::v64i1 && \"Currently the only custom case is when we split v64i1 to 2 regs\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 4330, __extension__ __PRETTY_FUNCTION__)); | |||
4331 | // Split v64i1 value into two registers | |||
4332 | Passv64i1ArgInRegs(dl, DAG, Arg, RegsToPass, VA, ArgLocs[++I], Subtarget); | |||
4333 | } else if (VA.isRegLoc()) { | |||
4334 | RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg)); | |||
4335 | const TargetOptions &Options = DAG.getTarget().Options; | |||
4336 | if (Options.EmitCallSiteInfo) | |||
4337 | CSInfo.emplace_back(VA.getLocReg(), I); | |||
4338 | if (isVarArg && IsWin64) { | |||
4339 | // Win64 ABI requires argument XMM reg to be copied to the corresponding | |||
4340 | // shadow reg if callee is a varargs function. | |||
4341 | Register ShadowReg; | |||
4342 | switch (VA.getLocReg()) { | |||
4343 | case X86::XMM0: ShadowReg = X86::RCX; break; | |||
4344 | case X86::XMM1: ShadowReg = X86::RDX; break; | |||
4345 | case X86::XMM2: ShadowReg = X86::R8; break; | |||
4346 | case X86::XMM3: ShadowReg = X86::R9; break; | |||
4347 | } | |||
4348 | if (ShadowReg) | |||
4349 | RegsToPass.push_back(std::make_pair(ShadowReg, Arg)); | |||
4350 | } | |||
4351 | } else if (!IsSibcall && (!isTailCall || isByVal)) { | |||
4352 | assert(VA.isMemLoc())(static_cast <bool> (VA.isMemLoc()) ? void (0) : __assert_fail ("VA.isMemLoc()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 4352, __extension__ __PRETTY_FUNCTION__)); | |||
4353 | if (!StackPtr.getNode()) | |||
4354 | StackPtr = DAG.getCopyFromReg(Chain, dl, RegInfo->getStackRegister(), | |||
4355 | getPointerTy(DAG.getDataLayout())); | |||
4356 | MemOpChains.push_back(LowerMemOpCallTo(Chain, StackPtr, Arg, | |||
4357 | dl, DAG, VA, Flags, isByVal)); | |||
4358 | } | |||
4359 | } | |||
4360 | ||||
4361 | if (!MemOpChains.empty()) | |||
4362 | Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOpChains); | |||
4363 | ||||
4364 | if (Subtarget.isPICStyleGOT()) { | |||
4365 | // ELF / PIC requires GOT in the EBX register before function calls via PLT | |||
4366 | // GOT pointer (except regcall). | |||
4367 | if (!isTailCall) { | |||
4368 | // Indirect call with RegCall calling convertion may use up all the | |||
4369 | // general registers, so it is not suitable to bind EBX reister for | |||
4370 | // GOT address, just let register allocator handle it. | |||
4371 | if (CallConv != CallingConv::X86_RegCall) | |||
4372 | RegsToPass.push_back(std::make_pair( | |||
4373 | Register(X86::EBX), DAG.getNode(X86ISD::GlobalBaseReg, SDLoc(), | |||
4374 | getPointerTy(DAG.getDataLayout())))); | |||
4375 | } else { | |||
4376 | // If we are tail calling and generating PIC/GOT style code load the | |||
4377 | // address of the callee into ECX. The value in ecx is used as target of | |||
4378 | // the tail jump. This is done to circumvent the ebx/callee-saved problem | |||
4379 | // for tail calls on PIC/GOT architectures. Normally we would just put the | |||
4380 | // address of GOT into ebx and then call target@PLT. But for tail calls | |||
4381 | // ebx would be restored (since ebx is callee saved) before jumping to the | |||
4382 | // target@PLT. | |||
4383 | ||||
4384 | // Note: The actual moving to ECX is done further down. | |||
4385 | GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee); | |||
4386 | if (G && !G->getGlobal()->hasLocalLinkage() && | |||
4387 | G->getGlobal()->hasDefaultVisibility()) | |||
4388 | Callee = LowerGlobalAddress(Callee, DAG); | |||
4389 | else if (isa<ExternalSymbolSDNode>(Callee)) | |||
4390 | Callee = LowerExternalSymbol(Callee, DAG); | |||
4391 | } | |||
4392 | } | |||
4393 | ||||
4394 | if (Is64Bit && isVarArg && !IsWin64 && !IsMustTail) { | |||
4395 | // From AMD64 ABI document: | |||
4396 | // For calls that may call functions that use varargs or stdargs | |||
4397 | // (prototype-less calls or calls to functions containing ellipsis (...) in | |||
4398 | // the declaration) %al is used as hidden argument to specify the number | |||
4399 | // of SSE registers used. The contents of %al do not need to match exactly | |||
4400 | // the number of registers, but must be an ubound on the number of SSE | |||
4401 | // registers used and is in the range 0 - 8 inclusive. | |||
4402 | ||||
4403 | // Count the number of XMM registers allocated. | |||
4404 | static const MCPhysReg XMMArgRegs[] = { | |||
4405 | X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3, | |||
4406 | X86::XMM4, X86::XMM5, X86::XMM6, X86::XMM7 | |||
4407 | }; | |||
4408 | unsigned NumXMMRegs = CCInfo.getFirstUnallocated(XMMArgRegs); | |||
4409 | assert((Subtarget.hasSSE1() || !NumXMMRegs)(static_cast <bool> ((Subtarget.hasSSE1() || !NumXMMRegs ) && "SSE registers cannot be used when SSE is disabled" ) ? void (0) : __assert_fail ("(Subtarget.hasSSE1() || !NumXMMRegs) && \"SSE registers cannot be used when SSE is disabled\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 4410, __extension__ __PRETTY_FUNCTION__)) | |||
4410 | && "SSE registers cannot be used when SSE is disabled")(static_cast <bool> ((Subtarget.hasSSE1() || !NumXMMRegs ) && "SSE registers cannot be used when SSE is disabled" ) ? void (0) : __assert_fail ("(Subtarget.hasSSE1() || !NumXMMRegs) && \"SSE registers cannot be used when SSE is disabled\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 4410, __extension__ __PRETTY_FUNCTION__)); | |||
4411 | RegsToPass.push_back(std::make_pair(Register(X86::AL), | |||
4412 | DAG.getConstant(NumXMMRegs, dl, | |||
4413 | MVT::i8))); | |||
4414 | } | |||
4415 | ||||
4416 | if (isVarArg && IsMustTail) { | |||
4417 | const auto &Forwards = X86Info->getForwardedMustTailRegParms(); | |||
4418 | for (const auto &F : Forwards) { | |||
4419 | SDValue Val = DAG.getCopyFromReg(Chain, dl, F.VReg, F.VT); | |||
4420 | RegsToPass.push_back(std::make_pair(F.PReg, Val)); | |||
4421 | } | |||
4422 | } | |||
4423 | ||||
4424 | // For tail calls lower the arguments to the 'real' stack slots. Sibcalls | |||
4425 | // don't need this because the eligibility check rejects calls that require | |||
4426 | // shuffling arguments passed in memory. | |||
4427 | if (!IsSibcall && isTailCall) { | |||
4428 | // Force all the incoming stack arguments to be loaded from the stack | |||
4429 | // before any new outgoing arguments are stored to the stack, because the | |||
4430 | // outgoing stack slots may alias the incoming argument stack slots, and | |||
4431 | // the alias isn't otherwise explicit. This is slightly more conservative | |||
4432 | // than necessary, because it means that each store effectively depends | |||
4433 | // on every argument instead of just those arguments it would clobber. | |||
4434 | SDValue ArgChain = DAG.getStackArgumentTokenFactor(Chain); | |||
4435 | ||||
4436 | SmallVector<SDValue, 8> MemOpChains2; | |||
4437 | SDValue FIN; | |||
4438 | int FI = 0; | |||
4439 | for (unsigned I = 0, OutsIndex = 0, E = ArgLocs.size(); I != E; | |||
4440 | ++I, ++OutsIndex) { | |||
4441 | CCValAssign &VA = ArgLocs[I]; | |||
4442 | ||||
4443 | if (VA.isRegLoc()) { | |||
4444 | if (VA.needsCustom()) { | |||
4445 | assert((CallConv == CallingConv::X86_RegCall) &&(static_cast <bool> ((CallConv == CallingConv::X86_RegCall ) && "Expecting custom case only in regcall calling convention" ) ? void (0) : __assert_fail ("(CallConv == CallingConv::X86_RegCall) && \"Expecting custom case only in regcall calling convention\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 4446, __extension__ __PRETTY_FUNCTION__)) | |||
4446 | "Expecting custom case only in regcall calling convention")(static_cast <bool> ((CallConv == CallingConv::X86_RegCall ) && "Expecting custom case only in regcall calling convention" ) ? void (0) : __assert_fail ("(CallConv == CallingConv::X86_RegCall) && \"Expecting custom case only in regcall calling convention\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 4446, __extension__ __PRETTY_FUNCTION__)); | |||
4447 | // This means that we are in special case where one argument was | |||
4448 | // passed through two register locations - Skip the next location | |||
4449 | ++I; | |||
4450 | } | |||
4451 | ||||
4452 | continue; | |||
4453 | } | |||
4454 | ||||
4455 | assert(VA.isMemLoc())(static_cast <bool> (VA.isMemLoc()) ? void (0) : __assert_fail ("VA.isMemLoc()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 4455, __extension__ __PRETTY_FUNCTION__)); | |||
4456 | SDValue Arg = OutVals[OutsIndex]; | |||
4457 | ISD::ArgFlagsTy Flags = Outs[OutsIndex].Flags; | |||
4458 | // Skip inalloca/preallocated arguments. They don't require any work. | |||
4459 | if (Flags.isInAlloca() || Flags.isPreallocated()) | |||
4460 | continue; | |||
4461 | // Create frame index. | |||
4462 | int32_t Offset = VA.getLocMemOffset()+FPDiff; | |||
4463 | uint32_t OpSize = (VA.getLocVT().getSizeInBits()+7)/8; | |||
4464 | FI = MF.getFrameInfo().CreateFixedObject(OpSize, Offset, true); | |||
4465 | FIN = DAG.getFrameIndex(FI, getPointerTy(DAG.getDataLayout())); | |||
4466 | ||||
4467 | if (Flags.isByVal()) { | |||
4468 | // Copy relative to framepointer. | |||
4469 | SDValue Source = DAG.getIntPtrConstant(VA.getLocMemOffset(), dl); | |||
4470 | if (!StackPtr.getNode()) | |||
4471 | StackPtr = DAG.getCopyFromReg(Chain, dl, RegInfo->getStackRegister(), | |||
4472 | getPointerTy(DAG.getDataLayout())); | |||
4473 | Source = DAG.getNode(ISD::ADD, dl, getPointerTy(DAG.getDataLayout()), | |||
4474 | StackPtr, Source); | |||
4475 | ||||
4476 | MemOpChains2.push_back(CreateCopyOfByValArgument(Source, FIN, | |||
4477 | ArgChain, | |||
4478 | Flags, DAG, dl)); | |||
4479 | } else { | |||
4480 | // Store relative to framepointer. | |||
4481 | MemOpChains2.push_back(DAG.getStore( | |||
4482 | ArgChain, dl, Arg, FIN, | |||
4483 | MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), FI))); | |||
4484 | } | |||
4485 | } | |||
4486 | ||||
4487 | if (!MemOpChains2.empty()) | |||
4488 | Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOpChains2); | |||
4489 | ||||
4490 | // Store the return address to the appropriate stack slot. | |||
4491 | Chain = EmitTailCallStoreRetAddr(DAG, MF, Chain, RetAddrFrIdx, | |||
4492 | getPointerTy(DAG.getDataLayout()), | |||
4493 | RegInfo->getSlotSize(), FPDiff, dl); | |||
4494 | } | |||
4495 | ||||
4496 | // Build a sequence of copy-to-reg nodes chained together with token chain | |||
4497 | // and flag operands which copy the outgoing args into registers. | |||
4498 | SDValue InFlag; | |||
4499 | for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) { | |||
4500 | Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first, | |||
4501 | RegsToPass[i].second, InFlag); | |||
4502 | InFlag = Chain.getValue(1); | |||
4503 | } | |||
4504 | ||||
4505 | if (DAG.getTarget().getCodeModel() == CodeModel::Large) { | |||
4506 | assert(Is64Bit && "Large code model is only legal in 64-bit mode.")(static_cast <bool> (Is64Bit && "Large code model is only legal in 64-bit mode." ) ? void (0) : __assert_fail ("Is64Bit && \"Large code model is only legal in 64-bit mode.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 4506, __extension__ __PRETTY_FUNCTION__)); | |||
4507 | // In the 64-bit large code model, we have to make all calls | |||
4508 | // through a register, since the call instruction's 32-bit | |||
4509 | // pc-relative offset may not be large enough to hold the whole | |||
4510 | // address. | |||
4511 | } else if (Callee->getOpcode() == ISD::GlobalAddress || | |||
4512 | Callee->getOpcode() == ISD::ExternalSymbol) { | |||
4513 | // Lower direct calls to global addresses and external symbols. Setting | |||
4514 | // ForCall to true here has the effect of removing WrapperRIP when possible | |||
4515 | // to allow direct calls to be selected without first materializing the | |||
4516 | // address into a register. | |||
4517 | Callee = LowerGlobalOrExternal(Callee, DAG, /*ForCall=*/true); | |||
4518 | } else if (Subtarget.isTarget64BitILP32() && | |||
4519 | Callee->getValueType(0) == MVT::i32) { | |||
4520 | // Zero-extend the 32-bit Callee address into a 64-bit according to x32 ABI | |||
4521 | Callee = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i64, Callee); | |||
4522 | } | |||
4523 | ||||
4524 | // Returns a chain & a flag for retval copy to use. | |||
4525 | SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue); | |||
4526 | SmallVector<SDValue, 8> Ops; | |||
4527 | ||||
4528 | if (!IsSibcall && isTailCall && !IsMustTail) { | |||
4529 | Chain = DAG.getCALLSEQ_END(Chain, | |||
4530 | DAG.getIntPtrConstant(NumBytesToPop, dl, true), | |||
4531 | DAG.getIntPtrConstant(0, dl, true), InFlag, dl); | |||
4532 | InFlag = Chain.getValue(1); | |||
4533 | } | |||
4534 | ||||
4535 | Ops.push_back(Chain); | |||
4536 | Ops.push_back(Callee); | |||
4537 | ||||
4538 | if (isTailCall) | |||
4539 | Ops.push_back(DAG.getTargetConstant(FPDiff, dl, MVT::i32)); | |||
4540 | ||||
4541 | // Add argument registers to the end of the list so that they are known live | |||
4542 | // into the call. | |||
4543 | for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) | |||
4544 | Ops.push_back(DAG.getRegister(RegsToPass[i].first, | |||
4545 | RegsToPass[i].second.getValueType())); | |||
4546 | ||||
4547 | // Add a register mask operand representing the call-preserved registers. | |||
4548 | const uint32_t *Mask = [&]() { | |||
4549 | auto AdaptedCC = CallConv; | |||
4550 | // If HasNCSR is asserted (attribute NoCallerSavedRegisters exists), | |||
4551 | // use X86_INTR calling convention because it has the same CSR mask | |||
4552 | // (same preserved registers). | |||
4553 | if (HasNCSR) | |||
4554 | AdaptedCC = (CallingConv::ID)CallingConv::X86_INTR; | |||
4555 | // If NoCalleeSavedRegisters is requested, than use GHC since it happens | |||
4556 | // to use the CSR_NoRegs_RegMask. | |||
4557 | if (CB && CB->hasFnAttr("no_callee_saved_registers")) | |||
4558 | AdaptedCC = (CallingConv::ID)CallingConv::GHC; | |||
4559 | return RegInfo->getCallPreservedMask(MF, AdaptedCC); | |||
4560 | }(); | |||
4561 | assert(Mask && "Missing call preserved mask for calling convention")(static_cast <bool> (Mask && "Missing call preserved mask for calling convention" ) ? void (0) : __assert_fail ("Mask && \"Missing call preserved mask for calling convention\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 4561, __extension__ __PRETTY_FUNCTION__)); | |||
4562 | ||||
4563 | // If this is an invoke in a 32-bit function using a funclet-based | |||
4564 | // personality, assume the function clobbers all registers. If an exception | |||
4565 | // is thrown, the runtime will not restore CSRs. | |||
4566 | // FIXME: Model this more precisely so that we can register allocate across | |||
4567 | // the normal edge and spill and fill across the exceptional edge. | |||
4568 | if (!Is64Bit && CLI.CB && isa<InvokeInst>(CLI.CB)) { | |||
4569 | const Function &CallerFn = MF.getFunction(); | |||
4570 | EHPersonality Pers = | |||
4571 | CallerFn.hasPersonalityFn() | |||
4572 | ? classifyEHPersonality(CallerFn.getPersonalityFn()) | |||
4573 | : EHPersonality::Unknown; | |||
4574 | if (isFuncletEHPersonality(Pers)) | |||
4575 | Mask = RegInfo->getNoPreservedMask(); | |||
4576 | } | |||
4577 | ||||
4578 | // Define a new register mask from the existing mask. | |||
4579 | uint32_t *RegMask = nullptr; | |||
4580 | ||||
4581 | // In some calling conventions we need to remove the used physical registers | |||
4582 | // from the reg mask. | |||
4583 | if (CallConv == CallingConv::X86_RegCall || HasNCSR) { | |||
4584 | const TargetRegisterInfo *TRI = Subtarget.getRegisterInfo(); | |||
4585 | ||||
4586 | // Allocate a new Reg Mask and copy Mask. | |||
4587 | RegMask = MF.allocateRegMask(); | |||
4588 | unsigned RegMaskSize = MachineOperand::getRegMaskSize(TRI->getNumRegs()); | |||
4589 | memcpy(RegMask, Mask, sizeof(RegMask[0]) * RegMaskSize); | |||
4590 | ||||
4591 | // Make sure all sub registers of the argument registers are reset | |||
4592 | // in the RegMask. | |||
4593 | for (auto const &RegPair : RegsToPass) | |||
4594 | for (MCSubRegIterator SubRegs(RegPair.first, TRI, /*IncludeSelf=*/true); | |||
4595 | SubRegs.isValid(); ++SubRegs) | |||
4596 | RegMask[*SubRegs / 32] &= ~(1u << (*SubRegs % 32)); | |||
4597 | ||||
4598 | // Create the RegMask Operand according to our updated mask. | |||
4599 | Ops.push_back(DAG.getRegisterMask(RegMask)); | |||
4600 | } else { | |||
4601 | // Create the RegMask Operand according to the static mask. | |||
4602 | Ops.push_back(DAG.getRegisterMask(Mask)); | |||
4603 | } | |||
4604 | ||||
4605 | if (InFlag.getNode()) | |||
4606 | Ops.push_back(InFlag); | |||
4607 | ||||
4608 | if (isTailCall) { | |||
4609 | // We used to do: | |||
4610 | //// If this is the first return lowered for this function, add the regs | |||
4611 | //// to the liveout set for the function. | |||
4612 | // This isn't right, although it's probably harmless on x86; liveouts | |||
4613 | // should be computed from returns not tail calls. Consider a void | |||
4614 | // function making a tail call to a function returning int. | |||
4615 | MF.getFrameInfo().setHasTailCall(); | |||
4616 | SDValue Ret = DAG.getNode(X86ISD::TC_RETURN, dl, NodeTys, Ops); | |||
4617 | DAG.addCallSiteInfo(Ret.getNode(), std::move(CSInfo)); | |||
4618 | return Ret; | |||
4619 | } | |||
4620 | ||||
4621 | if (HasNoCfCheck && IsCFProtectionSupported && IsIndirectCall) { | |||
4622 | Chain = DAG.getNode(X86ISD::NT_CALL, dl, NodeTys, Ops); | |||
4623 | } else if (CLI.CB && objcarc::hasAttachedCallOpBundle(CLI.CB)) { | |||
4624 | // Calls with a "clang.arc.attachedcall" bundle are special. They should be | |||
4625 | // expanded to the call, directly followed by a special marker sequence and | |||
4626 | // a call to a ObjC library function. Use the CALL_RVMARKER to do that. | |||
4627 | assert(!isTailCall &&(static_cast <bool> (!isTailCall && "tail calls cannot be marked with clang.arc.attachedcall" ) ? void (0) : __assert_fail ("!isTailCall && \"tail calls cannot be marked with clang.arc.attachedcall\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 4628, __extension__ __PRETTY_FUNCTION__)) | |||
4628 | "tail calls cannot be marked with clang.arc.attachedcall")(static_cast <bool> (!isTailCall && "tail calls cannot be marked with clang.arc.attachedcall" ) ? void (0) : __assert_fail ("!isTailCall && \"tail calls cannot be marked with clang.arc.attachedcall\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 4628, __extension__ __PRETTY_FUNCTION__)); | |||
4629 | assert(Is64Bit && "clang.arc.attachedcall is only supported in 64bit mode")(static_cast <bool> (Is64Bit && "clang.arc.attachedcall is only supported in 64bit mode" ) ? void (0) : __assert_fail ("Is64Bit && \"clang.arc.attachedcall is only supported in 64bit mode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 4629, __extension__ __PRETTY_FUNCTION__)); | |||
4630 | ||||
4631 | // Add target constant to select ObjC runtime call just before the call | |||
4632 | // target. RuntimeCallType == 0 selects objc_retainAutoreleasedReturnValue, | |||
4633 | // RuntimeCallType == 0 selects objc_unsafeClaimAutoreleasedReturnValue when | |||
4634 | // epxanding the pseudo. | |||
4635 | unsigned RuntimeCallType = | |||
4636 | objcarc::hasAttachedCallOpBundle(CLI.CB, true) ? 0 : 1; | |||
4637 | Ops.insert(Ops.begin() + 1, | |||
4638 | DAG.getTargetConstant(RuntimeCallType, dl, MVT::i32)); | |||
4639 | Chain = DAG.getNode(X86ISD::CALL_RVMARKER, dl, NodeTys, Ops); | |||
4640 | } else { | |||
4641 | Chain = DAG.getNode(X86ISD::CALL, dl, NodeTys, Ops); | |||
4642 | } | |||
4643 | ||||
4644 | InFlag = Chain.getValue(1); | |||
4645 | DAG.addNoMergeSiteInfo(Chain.getNode(), CLI.NoMerge); | |||
4646 | DAG.addCallSiteInfo(Chain.getNode(), std::move(CSInfo)); | |||
4647 | ||||
4648 | // Save heapallocsite metadata. | |||
4649 | if (CLI.CB) | |||
4650 | if (MDNode *HeapAlloc = CLI.CB->getMetadata("heapallocsite")) | |||
4651 | DAG.addHeapAllocSite(Chain.getNode(), HeapAlloc); | |||
4652 | ||||
4653 | // Create the CALLSEQ_END node. | |||
4654 | unsigned NumBytesForCalleeToPop; | |||
4655 | if (X86::isCalleePop(CallConv, Is64Bit, isVarArg, | |||
4656 | DAG.getTarget().Options.GuaranteedTailCallOpt)) | |||
4657 | NumBytesForCalleeToPop = NumBytes; // Callee pops everything | |||
4658 | else if (!Is64Bit && !canGuaranteeTCO(CallConv) && | |||
4659 | !Subtarget.getTargetTriple().isOSMSVCRT() && | |||
4660 | SR == StackStructReturn) | |||
4661 | // If this is a call to a struct-return function, the callee | |||
4662 | // pops the hidden struct pointer, so we have to push it back. | |||
4663 | // This is common for Darwin/X86, Linux & Mingw32 targets. | |||
4664 | // For MSVC Win32 targets, the caller pops the hidden struct pointer. | |||
4665 | NumBytesForCalleeToPop = 4; | |||
4666 | else | |||
4667 | NumBytesForCalleeToPop = 0; // Callee pops nothing. | |||
4668 | ||||
4669 | // Returns a flag for retval copy to use. | |||
4670 | if (!IsSibcall) { | |||
4671 | Chain = DAG.getCALLSEQ_END(Chain, | |||
4672 | DAG.getIntPtrConstant(NumBytesToPop, dl, true), | |||
4673 | DAG.getIntPtrConstant(NumBytesForCalleeToPop, dl, | |||
4674 | true), | |||
4675 | InFlag, dl); | |||
4676 | InFlag = Chain.getValue(1); | |||
4677 | } | |||
4678 | ||||
4679 | // Handle result values, copying them out of physregs into vregs that we | |||
4680 | // return. | |||
4681 | return LowerCallResult(Chain, InFlag, CallConv, isVarArg, Ins, dl, DAG, | |||
4682 | InVals, RegMask); | |||
4683 | } | |||
4684 | ||||
4685 | //===----------------------------------------------------------------------===// | |||
4686 | // Fast Calling Convention (tail call) implementation | |||
4687 | //===----------------------------------------------------------------------===// | |||
4688 | ||||
4689 | // Like std call, callee cleans arguments, convention except that ECX is | |||
4690 | // reserved for storing the tail called function address. Only 2 registers are | |||
4691 | // free for argument passing (inreg). Tail call optimization is performed | |||
4692 | // provided: | |||
4693 | // * tailcallopt is enabled | |||
4694 | // * caller/callee are fastcc | |||
4695 | // On X86_64 architecture with GOT-style position independent code only local | |||
4696 | // (within module) calls are supported at the moment. | |||
4697 | // To keep the stack aligned according to platform abi the function | |||
4698 | // GetAlignedArgumentStackSize ensures that argument delta is always multiples | |||
4699 | // of stack alignment. (Dynamic linkers need this - Darwin's dyld for example) | |||
4700 | // If a tail called function callee has more arguments than the caller the | |||
4701 | // caller needs to make sure that there is room to move the RETADDR to. This is | |||
4702 | // achieved by reserving an area the size of the argument delta right after the | |||
4703 | // original RETADDR, but before the saved framepointer or the spilled registers | |||
4704 | // e.g. caller(arg1, arg2) calls callee(arg1, arg2,arg3,arg4) | |||
4705 | // stack layout: | |||
4706 | // arg1 | |||
4707 | // arg2 | |||
4708 | // RETADDR | |||
4709 | // [ new RETADDR | |||
4710 | // move area ] | |||
4711 | // (possible EBP) | |||
4712 | // ESI | |||
4713 | // EDI | |||
4714 | // local1 .. | |||
4715 | ||||
4716 | /// Make the stack size align e.g 16n + 12 aligned for a 16-byte align | |||
4717 | /// requirement. | |||
4718 | unsigned | |||
4719 | X86TargetLowering::GetAlignedArgumentStackSize(const unsigned StackSize, | |||
4720 | SelectionDAG &DAG) const { | |||
4721 | const Align StackAlignment = Subtarget.getFrameLowering()->getStackAlign(); | |||
4722 | const uint64_t SlotSize = Subtarget.getRegisterInfo()->getSlotSize(); | |||
4723 | assert(StackSize % SlotSize == 0 &&(static_cast <bool> (StackSize % SlotSize == 0 && "StackSize must be a multiple of SlotSize") ? void (0) : __assert_fail ("StackSize % SlotSize == 0 && \"StackSize must be a multiple of SlotSize\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 4724, __extension__ __PRETTY_FUNCTION__)) | |||
4724 | "StackSize must be a multiple of SlotSize")(static_cast <bool> (StackSize % SlotSize == 0 && "StackSize must be a multiple of SlotSize") ? void (0) : __assert_fail ("StackSize % SlotSize == 0 && \"StackSize must be a multiple of SlotSize\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 4724, __extension__ __PRETTY_FUNCTION__)); | |||
4725 | return alignTo(StackSize + SlotSize, StackAlignment) - SlotSize; | |||
4726 | } | |||
4727 | ||||
4728 | /// Return true if the given stack call argument is already available in the | |||
4729 | /// same position (relatively) of the caller's incoming argument stack. | |||
4730 | static | |||
4731 | bool MatchingStackOffset(SDValue Arg, unsigned Offset, ISD::ArgFlagsTy Flags, | |||
4732 | MachineFrameInfo &MFI, const MachineRegisterInfo *MRI, | |||
4733 | const X86InstrInfo *TII, const CCValAssign &VA) { | |||
4734 | unsigned Bytes = Arg.getValueSizeInBits() / 8; | |||
4735 | ||||
4736 | for (;;) { | |||
4737 | // Look through nodes that don't alter the bits of the incoming value. | |||
4738 | unsigned Op = Arg.getOpcode(); | |||
4739 | if (Op == ISD::ZERO_EXTEND || Op == ISD::ANY_EXTEND || Op == ISD::BITCAST) { | |||
4740 | Arg = Arg.getOperand(0); | |||
4741 | continue; | |||
4742 | } | |||
4743 | if (Op == ISD::TRUNCATE) { | |||
4744 | const SDValue &TruncInput = Arg.getOperand(0); | |||
4745 | if (TruncInput.getOpcode() == ISD::AssertZext && | |||
4746 | cast<VTSDNode>(TruncInput.getOperand(1))->getVT() == | |||
4747 | Arg.getValueType()) { | |||
4748 | Arg = TruncInput.getOperand(0); | |||
4749 | continue; | |||
4750 | } | |||
4751 | } | |||
4752 | break; | |||
4753 | } | |||
4754 | ||||
4755 | int FI = INT_MAX2147483647; | |||
4756 | if (Arg.getOpcode() == ISD::CopyFromReg) { | |||
4757 | Register VR = cast<RegisterSDNode>(Arg.getOperand(1))->getReg(); | |||
4758 | if (!VR.isVirtual()) | |||
4759 | return false; | |||
4760 | MachineInstr *Def = MRI->getVRegDef(VR); | |||
4761 | if (!Def) | |||
4762 | return false; | |||
4763 | if (!Flags.isByVal()) { | |||
4764 | if (!TII->isLoadFromStackSlot(*Def, FI)) | |||
4765 | return false; | |||
4766 | } else { | |||
4767 | unsigned Opcode = Def->getOpcode(); | |||
4768 | if ((Opcode == X86::LEA32r || Opcode == X86::LEA64r || | |||
4769 | Opcode == X86::LEA64_32r) && | |||
4770 | Def->getOperand(1).isFI()) { | |||
4771 | FI = Def->getOperand(1).getIndex(); | |||
4772 | Bytes = Flags.getByValSize(); | |||
4773 | } else | |||
4774 | return false; | |||
4775 | } | |||
4776 | } else if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Arg)) { | |||
4777 | if (Flags.isByVal()) | |||
4778 | // ByVal argument is passed in as a pointer but it's now being | |||
4779 | // dereferenced. e.g. | |||
4780 | // define @foo(%struct.X* %A) { | |||
4781 | // tail call @bar(%struct.X* byval %A) | |||
4782 | // } | |||
4783 | return false; | |||
4784 | SDValue Ptr = Ld->getBasePtr(); | |||
4785 | FrameIndexSDNode *FINode = dyn_cast<FrameIndexSDNode>(Ptr); | |||
4786 | if (!FINode) | |||
4787 | return false; | |||
4788 | FI = FINode->getIndex(); | |||
4789 | } else if (Arg.getOpcode() == ISD::FrameIndex && Flags.isByVal()) { | |||
4790 | FrameIndexSDNode *FINode = cast<FrameIndexSDNode>(Arg); | |||
4791 | FI = FINode->getIndex(); | |||
4792 | Bytes = Flags.getByValSize(); | |||
4793 | } else | |||
4794 | return false; | |||
4795 | ||||
4796 | assert(FI != INT_MAX)(static_cast <bool> (FI != 2147483647) ? void (0) : __assert_fail ("FI != INT_MAX", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 4796, __extension__ __PRETTY_FUNCTION__)); | |||
4797 | if (!MFI.isFixedObjectIndex(FI)) | |||
4798 | return false; | |||
4799 | ||||
4800 | if (Offset != MFI.getObjectOffset(FI)) | |||
4801 | return false; | |||
4802 | ||||
4803 | // If this is not byval, check that the argument stack object is immutable. | |||
4804 | // inalloca and argument copy elision can create mutable argument stack | |||
4805 | // objects. Byval objects can be mutated, but a byval call intends to pass the | |||
4806 | // mutated memory. | |||
4807 | if (!Flags.isByVal() && !MFI.isImmutableObjectIndex(FI)) | |||
4808 | return false; | |||
4809 | ||||
4810 | if (VA.getLocVT().getFixedSizeInBits() > | |||
4811 | Arg.getValueSizeInBits().getFixedSize()) { | |||
4812 | // If the argument location is wider than the argument type, check that any | |||
4813 | // extension flags match. | |||
4814 | if (Flags.isZExt() != MFI.isObjectZExt(FI) || | |||
4815 | Flags.isSExt() != MFI.isObjectSExt(FI)) { | |||
4816 | return false; | |||
4817 | } | |||
4818 | } | |||
4819 | ||||
4820 | return Bytes == MFI.getObjectSize(FI); | |||
4821 | } | |||
4822 | ||||
4823 | /// Check whether the call is eligible for tail call optimization. Targets | |||
4824 | /// that want to do tail call optimization should implement this function. | |||
4825 | bool X86TargetLowering::IsEligibleForTailCallOptimization( | |||
4826 | SDValue Callee, CallingConv::ID CalleeCC, bool IsCalleeStackStructRet, | |||
4827 | bool isVarArg, Type *RetTy, const SmallVectorImpl<ISD::OutputArg> &Outs, | |||
4828 | const SmallVectorImpl<SDValue> &OutVals, | |||
4829 | const SmallVectorImpl<ISD::InputArg> &Ins, SelectionDAG &DAG) const { | |||
4830 | if (!mayTailCallThisCC(CalleeCC)) | |||
4831 | return false; | |||
4832 | ||||
4833 | // If -tailcallopt is specified, make fastcc functions tail-callable. | |||
4834 | MachineFunction &MF = DAG.getMachineFunction(); | |||
4835 | const Function &CallerF = MF.getFunction(); | |||
4836 | ||||
4837 | // If the function return type is x86_fp80 and the callee return type is not, | |||
4838 | // then the FP_EXTEND of the call result is not a nop. It's not safe to | |||
4839 | // perform a tailcall optimization here. | |||
4840 | if (CallerF.getReturnType()->isX86_FP80Ty() && !RetTy->isX86_FP80Ty()) | |||
4841 | return false; | |||
4842 | ||||
4843 | CallingConv::ID CallerCC = CallerF.getCallingConv(); | |||
4844 | bool CCMatch = CallerCC == CalleeCC; | |||
4845 | bool IsCalleeWin64 = Subtarget.isCallingConvWin64(CalleeCC); | |||
4846 | bool IsCallerWin64 = Subtarget.isCallingConvWin64(CallerCC); | |||
4847 | bool IsGuaranteeTCO = DAG.getTarget().Options.GuaranteedTailCallOpt || | |||
4848 | CalleeCC == CallingConv::Tail || CalleeCC == CallingConv::SwiftTail; | |||
4849 | ||||
4850 | // Win64 functions have extra shadow space for argument homing. Don't do the | |||
4851 | // sibcall if the caller and callee have mismatched expectations for this | |||
4852 | // space. | |||
4853 | if (IsCalleeWin64 != IsCallerWin64) | |||
4854 | return false; | |||
4855 | ||||
4856 | if (IsGuaranteeTCO) { | |||
4857 | if (canGuaranteeTCO(CalleeCC) && CCMatch) | |||
4858 | return true; | |||
4859 | return false; | |||
4860 | } | |||
4861 | ||||
4862 | // Look for obvious safe cases to perform tail call optimization that do not | |||
4863 | // require ABI changes. This is what gcc calls sibcall. | |||
4864 | ||||
4865 | // Can't do sibcall if stack needs to be dynamically re-aligned. PEI needs to | |||
4866 | // emit a special epilogue. | |||
4867 | const X86RegisterInfo *RegInfo = Subtarget.getRegisterInfo(); | |||
4868 | if (RegInfo->hasStackRealignment(MF)) | |||
4869 | return false; | |||
4870 | ||||
4871 | // Also avoid sibcall optimization if we're an sret return fn and the callee | |||
4872 | // is incompatible. See comment in LowerReturn about why hasStructRetAttr is | |||
4873 | // insufficient. | |||
4874 | if (MF.getInfo<X86MachineFunctionInfo>()->getSRetReturnReg()) { | |||
4875 | // For a compatible tail call the callee must return our sret pointer. So it | |||
4876 | // needs to be (a) an sret function itself and (b) we pass our sret as its | |||
4877 | // sret. Condition #b is harder to determine. | |||
4878 | return false; | |||
4879 | } else if (Subtarget.is32Bit() && IsCalleeStackStructRet) | |||
4880 | // In the i686 ABI, the sret pointer is callee-pop, so we cannot tail-call, | |||
4881 | // as our caller doesn't expect that. | |||
4882 | return false; | |||
4883 | ||||
4884 | // Do not sibcall optimize vararg calls unless all arguments are passed via | |||
4885 | // registers. | |||
4886 | LLVMContext &C = *DAG.getContext(); | |||
4887 | if (isVarArg && !Outs.empty()) { | |||
4888 | // Optimizing for varargs on Win64 is unlikely to be safe without | |||
4889 | // additional testing. | |||
4890 | if (IsCalleeWin64 || IsCallerWin64) | |||
4891 | return false; | |||
4892 | ||||
4893 | SmallVector<CCValAssign, 16> ArgLocs; | |||
4894 | CCState CCInfo(CalleeCC, isVarArg, MF, ArgLocs, C); | |||
4895 | ||||
4896 | CCInfo.AnalyzeCallOperands(Outs, CC_X86); | |||
4897 | for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) | |||
4898 | if (!ArgLocs[i].isRegLoc()) | |||
4899 | return false; | |||
4900 | } | |||
4901 | ||||
4902 | // If the call result is in ST0 / ST1, it needs to be popped off the x87 | |||
4903 | // stack. Therefore, if it's not used by the call it is not safe to optimize | |||
4904 | // this into a sibcall. | |||
4905 | bool Unused = false; | |||
4906 | for (unsigned i = 0, e = Ins.size(); i != e; ++i) { | |||
4907 | if (!Ins[i].Used) { | |||
4908 | Unused = true; | |||
4909 | break; | |||
4910 | } | |||
4911 | } | |||
4912 | if (Unused) { | |||
4913 | SmallVector<CCValAssign, 16> RVLocs; | |||
4914 | CCState CCInfo(CalleeCC, false, MF, RVLocs, C); | |||
4915 | CCInfo.AnalyzeCallResult(Ins, RetCC_X86); | |||
4916 | for (unsigned i = 0, e = RVLocs.size(); i != e; ++i) { | |||
4917 | CCValAssign &VA = RVLocs[i]; | |||
4918 | if (VA.getLocReg() == X86::FP0 || VA.getLocReg() == X86::FP1) | |||
4919 | return false; | |||
4920 | } | |||
4921 | } | |||
4922 | ||||
4923 | // Check that the call results are passed in the same way. | |||
4924 | if (!CCState::resultsCompatible(CalleeCC, CallerCC, MF, C, Ins, | |||
4925 | RetCC_X86, RetCC_X86)) | |||
4926 | return false; | |||
4927 | // The callee has to preserve all registers the caller needs to preserve. | |||
4928 | const X86RegisterInfo *TRI = Subtarget.getRegisterInfo(); | |||
4929 | const uint32_t *CallerPreserved = TRI->getCallPreservedMask(MF, CallerCC); | |||
4930 | if (!CCMatch) { | |||
4931 | const uint32_t *CalleePreserved = TRI->getCallPreservedMask(MF, CalleeCC); | |||
4932 | if (!TRI->regmaskSubsetEqual(CallerPreserved, CalleePreserved)) | |||
4933 | return false; | |||
4934 | } | |||
4935 | ||||
4936 | unsigned StackArgsSize = 0; | |||
4937 | ||||
4938 | // If the callee takes no arguments then go on to check the results of the | |||
4939 | // call. | |||
4940 | if (!Outs.empty()) { | |||
4941 | // Check if stack adjustment is needed. For now, do not do this if any | |||
4942 | // argument is passed on the stack. | |||
4943 | SmallVector<CCValAssign, 16> ArgLocs; | |||
4944 | CCState CCInfo(CalleeCC, isVarArg, MF, ArgLocs, C); | |||
4945 | ||||
4946 | // Allocate shadow area for Win64 | |||
4947 | if (IsCalleeWin64) | |||
4948 | CCInfo.AllocateStack(32, Align(8)); | |||
4949 | ||||
4950 | CCInfo.AnalyzeCallOperands(Outs, CC_X86); | |||
4951 | StackArgsSize = CCInfo.getNextStackOffset(); | |||
4952 | ||||
4953 | if (CCInfo.getNextStackOffset()) { | |||
4954 | // Check if the arguments are already laid out in the right way as | |||
4955 | // the caller's fixed stack objects. | |||
4956 | MachineFrameInfo &MFI = MF.getFrameInfo(); | |||
4957 | const MachineRegisterInfo *MRI = &MF.getRegInfo(); | |||
4958 | const X86InstrInfo *TII = Subtarget.getInstrInfo(); | |||
4959 | for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) { | |||
4960 | CCValAssign &VA = ArgLocs[i]; | |||
4961 | SDValue Arg = OutVals[i]; | |||
4962 | ISD::ArgFlagsTy Flags = Outs[i].Flags; | |||
4963 | if (VA.getLocInfo() == CCValAssign::Indirect) | |||
4964 | return false; | |||
4965 | if (!VA.isRegLoc()) { | |||
4966 | if (!MatchingStackOffset(Arg, VA.getLocMemOffset(), Flags, | |||
4967 | MFI, MRI, TII, VA)) | |||
4968 | return false; | |||
4969 | } | |||
4970 | } | |||
4971 | } | |||
4972 | ||||
4973 | bool PositionIndependent = isPositionIndependent(); | |||
4974 | // If the tailcall address may be in a register, then make sure it's | |||
4975 | // possible to register allocate for it. In 32-bit, the call address can | |||
4976 | // only target EAX, EDX, or ECX since the tail call must be scheduled after | |||
4977 | // callee-saved registers are restored. These happen to be the same | |||
4978 | // registers used to pass 'inreg' arguments so watch out for those. | |||
4979 | if (!Subtarget.is64Bit() && ((!isa<GlobalAddressSDNode>(Callee) && | |||
4980 | !isa<ExternalSymbolSDNode>(Callee)) || | |||
4981 | PositionIndependent)) { | |||
4982 | unsigned NumInRegs = 0; | |||
4983 | // In PIC we need an extra register to formulate the address computation | |||
4984 | // for the callee. | |||
4985 | unsigned MaxInRegs = PositionIndependent ? 2 : 3; | |||
4986 | ||||
4987 | for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) { | |||
4988 | CCValAssign &VA = ArgLocs[i]; | |||
4989 | if (!VA.isRegLoc()) | |||
4990 | continue; | |||
4991 | Register Reg = VA.getLocReg(); | |||
4992 | switch (Reg) { | |||
4993 | default: break; | |||
4994 | case X86::EAX: case X86::EDX: case X86::ECX: | |||
4995 | if (++NumInRegs == MaxInRegs) | |||
4996 | return false; | |||
4997 | break; | |||
4998 | } | |||
4999 | } | |||
5000 | } | |||
5001 | ||||
5002 | const MachineRegisterInfo &MRI = MF.getRegInfo(); | |||
5003 | if (!parametersInCSRMatch(MRI, CallerPreserved, ArgLocs, OutVals)) | |||
5004 | return false; | |||
5005 | } | |||
5006 | ||||
5007 | bool CalleeWillPop = | |||
5008 | X86::isCalleePop(CalleeCC, Subtarget.is64Bit(), isVarArg, | |||
5009 | MF.getTarget().Options.GuaranteedTailCallOpt); | |||
5010 | ||||
5011 | if (unsigned BytesToPop = | |||
5012 | MF.getInfo<X86MachineFunctionInfo>()->getBytesToPopOnReturn()) { | |||
5013 | // If we have bytes to pop, the callee must pop them. | |||
5014 | bool CalleePopMatches = CalleeWillPop && BytesToPop == StackArgsSize; | |||
5015 | if (!CalleePopMatches) | |||
5016 | return false; | |||
5017 | } else if (CalleeWillPop && StackArgsSize > 0) { | |||
5018 | // If we don't have bytes to pop, make sure the callee doesn't pop any. | |||
5019 | return false; | |||
5020 | } | |||
5021 | ||||
5022 | return true; | |||
5023 | } | |||
5024 | ||||
5025 | FastISel * | |||
5026 | X86TargetLowering::createFastISel(FunctionLoweringInfo &funcInfo, | |||
5027 | const TargetLibraryInfo *libInfo) const { | |||
5028 | return X86::createFastISel(funcInfo, libInfo); | |||
5029 | } | |||
5030 | ||||
5031 | //===----------------------------------------------------------------------===// | |||
5032 | // Other Lowering Hooks | |||
5033 | //===----------------------------------------------------------------------===// | |||
5034 | ||||
5035 | static bool MayFoldLoad(SDValue Op, bool AssumeSingleUse = false) { | |||
5036 | return (AssumeSingleUse || Op.hasOneUse()) && ISD::isNormalLoad(Op.getNode()); | |||
5037 | } | |||
5038 | ||||
5039 | static bool MayFoldLoadIntoBroadcastFromMem(SDValue Op, MVT EltVT, | |||
5040 | bool AssumeSingleUse = false) { | |||
5041 | if (!MayFoldLoad(Op, AssumeSingleUse)) | |||
5042 | return false; | |||
5043 | ||||
5044 | // We can not replace a wide volatile load with a broadcast-from-memory, | |||
5045 | // because that would narrow the load, which isn't legal for volatiles. | |||
5046 | const LoadSDNode *Ld = dyn_cast<LoadSDNode>(Op.getNode()); | |||
5047 | return !Ld->isVolatile() || | |||
5048 | Ld->getValueSizeInBits(0) == EltVT.getScalarSizeInBits(); | |||
5049 | } | |||
5050 | ||||
5051 | static bool MayFoldIntoStore(SDValue Op) { | |||
5052 | return Op.hasOneUse() && ISD::isNormalStore(*Op.getNode()->use_begin()); | |||
5053 | } | |||
5054 | ||||
5055 | static bool MayFoldIntoZeroExtend(SDValue Op) { | |||
5056 | if (Op.hasOneUse()) { | |||
5057 | unsigned Opcode = Op.getNode()->use_begin()->getOpcode(); | |||
5058 | return (ISD::ZERO_EXTEND == Opcode); | |||
5059 | } | |||
5060 | return false; | |||
5061 | } | |||
5062 | ||||
5063 | static bool isTargetShuffle(unsigned Opcode) { | |||
5064 | switch(Opcode) { | |||
5065 | default: return false; | |||
5066 | case X86ISD::BLENDI: | |||
5067 | case X86ISD::PSHUFB: | |||
5068 | case X86ISD::PSHUFD: | |||
5069 | case X86ISD::PSHUFHW: | |||
5070 | case X86ISD::PSHUFLW: | |||
5071 | case X86ISD::SHUFP: | |||
5072 | case X86ISD::INSERTPS: | |||
5073 | case X86ISD::EXTRQI: | |||
5074 | case X86ISD::INSERTQI: | |||
5075 | case X86ISD::VALIGN: | |||
5076 | case X86ISD::PALIGNR: | |||
5077 | case X86ISD::VSHLDQ: | |||
5078 | case X86ISD::VSRLDQ: | |||
5079 | case X86ISD::MOVLHPS: | |||
5080 | case X86ISD::MOVHLPS: | |||
5081 | case X86ISD::MOVSHDUP: | |||
5082 | case X86ISD::MOVSLDUP: | |||
5083 | case X86ISD::MOVDDUP: | |||
5084 | case X86ISD::MOVSS: | |||
5085 | case X86ISD::MOVSD: | |||
5086 | case X86ISD::MOVSH: | |||
5087 | case X86ISD::UNPCKL: | |||
5088 | case X86ISD::UNPCKH: | |||
5089 | case X86ISD::VBROADCAST: | |||
5090 | case X86ISD::VPERMILPI: | |||
5091 | case X86ISD::VPERMILPV: | |||
5092 | case X86ISD::VPERM2X128: | |||
5093 | case X86ISD::SHUF128: | |||
5094 | case X86ISD::VPERMIL2: | |||
5095 | case X86ISD::VPERMI: | |||
5096 | case X86ISD::VPPERM: | |||
5097 | case X86ISD::VPERMV: | |||
5098 | case X86ISD::VPERMV3: | |||
5099 | case X86ISD::VZEXT_MOVL: | |||
5100 | return true; | |||
5101 | } | |||
5102 | } | |||
5103 | ||||
5104 | static bool isTargetShuffleVariableMask(unsigned Opcode) { | |||
5105 | switch (Opcode) { | |||
5106 | default: return false; | |||
5107 | // Target Shuffles. | |||
5108 | case X86ISD::PSHUFB: | |||
5109 | case X86ISD::VPERMILPV: | |||
5110 | case X86ISD::VPERMIL2: | |||
5111 | case X86ISD::VPPERM: | |||
5112 | case X86ISD::VPERMV: | |||
5113 | case X86ISD::VPERMV3: | |||
5114 | return true; | |||
5115 | // 'Faux' Target Shuffles. | |||
5116 | case ISD::OR: | |||
5117 | case ISD::AND: | |||
5118 | case X86ISD::ANDNP: | |||
5119 | return true; | |||
5120 | } | |||
5121 | } | |||
5122 | ||||
5123 | static bool isTargetShuffleSplat(SDValue Op) { | |||
5124 | unsigned Opcode = Op.getOpcode(); | |||
5125 | if (Opcode == ISD::EXTRACT_SUBVECTOR) | |||
5126 | return isTargetShuffleSplat(Op.getOperand(0)); | |||
5127 | return Opcode == X86ISD::VBROADCAST || Opcode == X86ISD::VBROADCAST_LOAD; | |||
5128 | } | |||
5129 | ||||
5130 | SDValue X86TargetLowering::getReturnAddressFrameIndex(SelectionDAG &DAG) const { | |||
5131 | MachineFunction &MF = DAG.getMachineFunction(); | |||
5132 | const X86RegisterInfo *RegInfo = Subtarget.getRegisterInfo(); | |||
5133 | X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>(); | |||
5134 | int ReturnAddrIndex = FuncInfo->getRAIndex(); | |||
5135 | ||||
5136 | if (ReturnAddrIndex == 0) { | |||
5137 | // Set up a frame object for the return address. | |||
5138 | unsigned SlotSize = RegInfo->getSlotSize(); | |||
5139 | ReturnAddrIndex = MF.getFrameInfo().CreateFixedObject(SlotSize, | |||
5140 | -(int64_t)SlotSize, | |||
5141 | false); | |||
5142 | FuncInfo->setRAIndex(ReturnAddrIndex); | |||
5143 | } | |||
5144 | ||||
5145 | return DAG.getFrameIndex(ReturnAddrIndex, getPointerTy(DAG.getDataLayout())); | |||
5146 | } | |||
5147 | ||||
5148 | bool X86::isOffsetSuitableForCodeModel(int64_t Offset, CodeModel::Model M, | |||
5149 | bool hasSymbolicDisplacement) { | |||
5150 | // Offset should fit into 32 bit immediate field. | |||
5151 | if (!isInt<32>(Offset)) | |||
5152 | return false; | |||
5153 | ||||
5154 | // If we don't have a symbolic displacement - we don't have any extra | |||
5155 | // restrictions. | |||
5156 | if (!hasSymbolicDisplacement) | |||
5157 | return true; | |||
5158 | ||||
5159 | // FIXME: Some tweaks might be needed for medium code model. | |||
5160 | if (M != CodeModel::Small && M != CodeModel::Kernel) | |||
5161 | return false; | |||
5162 | ||||
5163 | // For small code model we assume that latest object is 16MB before end of 31 | |||
5164 | // bits boundary. We may also accept pretty large negative constants knowing | |||
5165 | // that all objects are in the positive half of address space. | |||
5166 | if (M == CodeModel::Small && Offset < 16*1024*1024) | |||
5167 | return true; | |||
5168 | ||||
5169 | // For kernel code model we know that all object resist in the negative half | |||
5170 | // of 32bits address space. We may not accept negative offsets, since they may | |||
5171 | // be just off and we may accept pretty large positive ones. | |||
5172 | if (M == CodeModel::Kernel && Offset >= 0) | |||
5173 | return true; | |||
5174 | ||||
5175 | return false; | |||
5176 | } | |||
5177 | ||||
5178 | /// Determines whether the callee is required to pop its own arguments. | |||
5179 | /// Callee pop is necessary to support tail calls. | |||
5180 | bool X86::isCalleePop(CallingConv::ID CallingConv, | |||
5181 | bool is64Bit, bool IsVarArg, bool GuaranteeTCO) { | |||
5182 | // If GuaranteeTCO is true, we force some calls to be callee pop so that we | |||
5183 | // can guarantee TCO. | |||
5184 | if (!IsVarArg && shouldGuaranteeTCO(CallingConv, GuaranteeTCO)) | |||
5185 | return true; | |||
5186 | ||||
5187 | switch (CallingConv) { | |||
5188 | default: | |||
5189 | return false; | |||
5190 | case CallingConv::X86_StdCall: | |||
5191 | case CallingConv::X86_FastCall: | |||
5192 | case CallingConv::X86_ThisCall: | |||
5193 | case CallingConv::X86_VectorCall: | |||
5194 | return !is64Bit; | |||
5195 | } | |||
5196 | } | |||
5197 | ||||
5198 | /// Return true if the condition is an signed comparison operation. | |||
5199 | static bool isX86CCSigned(unsigned X86CC) { | |||
5200 | switch (X86CC) { | |||
5201 | default: | |||
5202 | llvm_unreachable("Invalid integer condition!")::llvm::llvm_unreachable_internal("Invalid integer condition!" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 5202); | |||
5203 | case X86::COND_E: | |||
5204 | case X86::COND_NE: | |||
5205 | case X86::COND_B: | |||
5206 | case X86::COND_A: | |||
5207 | case X86::COND_BE: | |||
5208 | case X86::COND_AE: | |||
5209 | return false; | |||
5210 | case X86::COND_G: | |||
5211 | case X86::COND_GE: | |||
5212 | case X86::COND_L: | |||
5213 | case X86::COND_LE: | |||
5214 | return true; | |||
5215 | } | |||
5216 | } | |||
5217 | ||||
5218 | static X86::CondCode TranslateIntegerX86CC(ISD::CondCode SetCCOpcode) { | |||
5219 | switch (SetCCOpcode) { | |||
5220 | default: llvm_unreachable("Invalid integer condition!")::llvm::llvm_unreachable_internal("Invalid integer condition!" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 5220); | |||
5221 | case ISD::SETEQ: return X86::COND_E; | |||
5222 | case ISD::SETGT: return X86::COND_G; | |||
5223 | case ISD::SETGE: return X86::COND_GE; | |||
5224 | case ISD::SETLT: return X86::COND_L; | |||
5225 | case ISD::SETLE: return X86::COND_LE; | |||
5226 | case ISD::SETNE: return X86::COND_NE; | |||
5227 | case ISD::SETULT: return X86::COND_B; | |||
5228 | case ISD::SETUGT: return X86::COND_A; | |||
5229 | case ISD::SETULE: return X86::COND_BE; | |||
5230 | case ISD::SETUGE: return X86::COND_AE; | |||
5231 | } | |||
5232 | } | |||
5233 | ||||
5234 | /// Do a one-to-one translation of a ISD::CondCode to the X86-specific | |||
5235 | /// condition code, returning the condition code and the LHS/RHS of the | |||
5236 | /// comparison to make. | |||
5237 | static X86::CondCode TranslateX86CC(ISD::CondCode SetCCOpcode, const SDLoc &DL, | |||
5238 | bool isFP, SDValue &LHS, SDValue &RHS, | |||
5239 | SelectionDAG &DAG) { | |||
5240 | if (!isFP) { | |||
5241 | if (ConstantSDNode *RHSC = dyn_cast<ConstantSDNode>(RHS)) { | |||
5242 | if (SetCCOpcode == ISD::SETGT && RHSC->isAllOnesValue()) { | |||
5243 | // X > -1 -> X == 0, jump !sign. | |||
5244 | RHS = DAG.getConstant(0, DL, RHS.getValueType()); | |||
5245 | return X86::COND_NS; | |||
5246 | } | |||
5247 | if (SetCCOpcode == ISD::SETLT && RHSC->isNullValue()) { | |||
5248 | // X < 0 -> X == 0, jump on sign. | |||
5249 | return X86::COND_S; | |||
5250 | } | |||
5251 | if (SetCCOpcode == ISD::SETGE && RHSC->isNullValue()) { | |||
5252 | // X >= 0 -> X == 0, jump on !sign. | |||
5253 | return X86::COND_NS; | |||
5254 | } | |||
5255 | if (SetCCOpcode == ISD::SETLT && RHSC->isOne()) { | |||
5256 | // X < 1 -> X <= 0 | |||
5257 | RHS = DAG.getConstant(0, DL, RHS.getValueType()); | |||
5258 | return X86::COND_LE; | |||
5259 | } | |||
5260 | } | |||
5261 | ||||
5262 | return TranslateIntegerX86CC(SetCCOpcode); | |||
5263 | } | |||
5264 | ||||
5265 | // First determine if it is required or is profitable to flip the operands. | |||
5266 | ||||
5267 | // If LHS is a foldable load, but RHS is not, flip the condition. | |||
5268 | if (ISD::isNON_EXTLoad(LHS.getNode()) && | |||
5269 | !ISD::isNON_EXTLoad(RHS.getNode())) { | |||
5270 | SetCCOpcode = getSetCCSwappedOperands(SetCCOpcode); | |||
5271 | std::swap(LHS, RHS); | |||
5272 | } | |||
5273 | ||||
5274 | switch (SetCCOpcode) { | |||
5275 | default: break; | |||
5276 | case ISD::SETOLT: | |||
5277 | case ISD::SETOLE: | |||
5278 | case ISD::SETUGT: | |||
5279 | case ISD::SETUGE: | |||
5280 | std::swap(LHS, RHS); | |||
5281 | break; | |||
5282 | } | |||
5283 | ||||
5284 | // On a floating point condition, the flags are set as follows: | |||
5285 | // ZF PF CF op | |||
5286 | // 0 | 0 | 0 | X > Y | |||
5287 | // 0 | 0 | 1 | X < Y | |||
5288 | // 1 | 0 | 0 | X == Y | |||
5289 | // 1 | 1 | 1 | unordered | |||
5290 | switch (SetCCOpcode) { | |||
5291 | default: llvm_unreachable("Condcode should be pre-legalized away")::llvm::llvm_unreachable_internal("Condcode should be pre-legalized away" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 5291); | |||
5292 | case ISD::SETUEQ: | |||
5293 | case ISD::SETEQ: return X86::COND_E; | |||
5294 | case ISD::SETOLT: // flipped | |||
5295 | case ISD::SETOGT: | |||
5296 | case ISD::SETGT: return X86::COND_A; | |||
5297 | case ISD::SETOLE: // flipped | |||
5298 | case ISD::SETOGE: | |||
5299 | case ISD::SETGE: return X86::COND_AE; | |||
5300 | case ISD::SETUGT: // flipped | |||
5301 | case ISD::SETULT: | |||
5302 | case ISD::SETLT: return X86::COND_B; | |||
5303 | case ISD::SETUGE: // flipped | |||
5304 | case ISD::SETULE: | |||
5305 | case ISD::SETLE: return X86::COND_BE; | |||
5306 | case ISD::SETONE: | |||
5307 | case ISD::SETNE: return X86::COND_NE; | |||
5308 | case ISD::SETUO: return X86::COND_P; | |||
5309 | case ISD::SETO: return X86::COND_NP; | |||
5310 | case ISD::SETOEQ: | |||
5311 | case ISD::SETUNE: return X86::COND_INVALID; | |||
5312 | } | |||
5313 | } | |||
5314 | ||||
5315 | /// Is there a floating point cmov for the specific X86 condition code? | |||
5316 | /// Current x86 isa includes the following FP cmov instructions: | |||
5317 | /// fcmovb, fcomvbe, fcomve, fcmovu, fcmovae, fcmova, fcmovne, fcmovnu. | |||
5318 | static bool hasFPCMov(unsigned X86CC) { | |||
5319 | switch (X86CC) { | |||
5320 | default: | |||
5321 | return false; | |||
5322 | case X86::COND_B: | |||
5323 | case X86::COND_BE: | |||
5324 | case X86::COND_E: | |||
5325 | case X86::COND_P: | |||
5326 | case X86::COND_A: | |||
5327 | case X86::COND_AE: | |||
5328 | case X86::COND_NE: | |||
5329 | case X86::COND_NP: | |||
5330 | return true; | |||
5331 | } | |||
5332 | } | |||
5333 | ||||
5334 | ||||
5335 | bool X86TargetLowering::getTgtMemIntrinsic(IntrinsicInfo &Info, | |||
5336 | const CallInst &I, | |||
5337 | MachineFunction &MF, | |||
5338 | unsigned Intrinsic) const { | |||
5339 | Info.flags = MachineMemOperand::MONone; | |||
5340 | Info.offset = 0; | |||
5341 | ||||
5342 | const IntrinsicData* IntrData = getIntrinsicWithChain(Intrinsic); | |||
5343 | if (!IntrData) { | |||
5344 | switch (Intrinsic) { | |||
5345 | case Intrinsic::x86_aesenc128kl: | |||
5346 | case Intrinsic::x86_aesdec128kl: | |||
5347 | Info.opc = ISD::INTRINSIC_W_CHAIN; | |||
5348 | Info.ptrVal = I.getArgOperand(1); | |||
5349 | Info.memVT = EVT::getIntegerVT(I.getType()->getContext(), 48); | |||
5350 | Info.align = Align(1); | |||
5351 | Info.flags |= MachineMemOperand::MOLoad; | |||
5352 | return true; | |||
5353 | case Intrinsic::x86_aesenc256kl: | |||
5354 | case Intrinsic::x86_aesdec256kl: | |||
5355 | Info.opc = ISD::INTRINSIC_W_CHAIN; | |||
5356 | Info.ptrVal = I.getArgOperand(1); | |||
5357 | Info.memVT = EVT::getIntegerVT(I.getType()->getContext(), 64); | |||
5358 | Info.align = Align(1); | |||
5359 | Info.flags |= MachineMemOperand::MOLoad; | |||
5360 | return true; | |||
5361 | case Intrinsic::x86_aesencwide128kl: | |||
5362 | case Intrinsic::x86_aesdecwide128kl: | |||
5363 | Info.opc = ISD::INTRINSIC_W_CHAIN; | |||
5364 | Info.ptrVal = I.getArgOperand(0); | |||
5365 | Info.memVT = EVT::getIntegerVT(I.getType()->getContext(), 48); | |||
5366 | Info.align = Align(1); | |||
5367 | Info.flags |= MachineMemOperand::MOLoad; | |||
5368 | return true; | |||
5369 | case Intrinsic::x86_aesencwide256kl: | |||
5370 | case Intrinsic::x86_aesdecwide256kl: | |||
5371 | Info.opc = ISD::INTRINSIC_W_CHAIN; | |||
5372 | Info.ptrVal = I.getArgOperand(0); | |||
5373 | Info.memVT = EVT::getIntegerVT(I.getType()->getContext(), 64); | |||
5374 | Info.align = Align(1); | |||
5375 | Info.flags |= MachineMemOperand::MOLoad; | |||
5376 | return true; | |||
5377 | } | |||
5378 | return false; | |||
5379 | } | |||
5380 | ||||
5381 | switch (IntrData->Type) { | |||
5382 | case TRUNCATE_TO_MEM_VI8: | |||
5383 | case TRUNCATE_TO_MEM_VI16: | |||
5384 | case TRUNCATE_TO_MEM_VI32: { | |||
5385 | Info.opc = ISD::INTRINSIC_VOID; | |||
5386 | Info.ptrVal = I.getArgOperand(0); | |||
5387 | MVT VT = MVT::getVT(I.getArgOperand(1)->getType()); | |||
5388 | MVT ScalarVT = MVT::INVALID_SIMPLE_VALUE_TYPE; | |||
5389 | if (IntrData->Type == TRUNCATE_TO_MEM_VI8) | |||
5390 | ScalarVT = MVT::i8; | |||
5391 | else if (IntrData->Type == TRUNCATE_TO_MEM_VI16) | |||
5392 | ScalarVT = MVT::i16; | |||
5393 | else if (IntrData->Type == TRUNCATE_TO_MEM_VI32) | |||
5394 | ScalarVT = MVT::i32; | |||
5395 | ||||
5396 | Info.memVT = MVT::getVectorVT(ScalarVT, VT.getVectorNumElements()); | |||
5397 | Info.align = Align(1); | |||
5398 | Info.flags |= MachineMemOperand::MOStore; | |||
5399 | break; | |||
5400 | } | |||
5401 | case GATHER: | |||
5402 | case GATHER_AVX2: { | |||
5403 | Info.opc = ISD::INTRINSIC_W_CHAIN; | |||
5404 | Info.ptrVal = nullptr; | |||
5405 | MVT DataVT = MVT::getVT(I.getType()); | |||
5406 | MVT IndexVT = MVT::getVT(I.getArgOperand(2)->getType()); | |||
5407 | unsigned NumElts = std::min(DataVT.getVectorNumElements(), | |||
5408 | IndexVT.getVectorNumElements()); | |||
5409 | Info.memVT = MVT::getVectorVT(DataVT.getVectorElementType(), NumElts); | |||
5410 | Info.align = Align(1); | |||
5411 | Info.flags |= MachineMemOperand::MOLoad; | |||
5412 | break; | |||
5413 | } | |||
5414 | case SCATTER: { | |||
5415 | Info.opc = ISD::INTRINSIC_VOID; | |||
5416 | Info.ptrVal = nullptr; | |||
5417 | MVT DataVT = MVT::getVT(I.getArgOperand(3)->getType()); | |||
5418 | MVT IndexVT = MVT::getVT(I.getArgOperand(2)->getType()); | |||
5419 | unsigned NumElts = std::min(DataVT.getVectorNumElements(), | |||
5420 | IndexVT.getVectorNumElements()); | |||
5421 | Info.memVT = MVT::getVectorVT(DataVT.getVectorElementType(), NumElts); | |||
5422 | Info.align = Align(1); | |||
5423 | Info.flags |= MachineMemOperand::MOStore; | |||
5424 | break; | |||
5425 | } | |||
5426 | default: | |||
5427 | return false; | |||
5428 | } | |||
5429 | ||||
5430 | return true; | |||
5431 | } | |||
5432 | ||||
5433 | /// Returns true if the target can instruction select the | |||
5434 | /// specified FP immediate natively. If false, the legalizer will | |||
5435 | /// materialize the FP immediate as a load from a constant pool. | |||
5436 | bool X86TargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT, | |||
5437 | bool ForCodeSize) const { | |||
5438 | for (unsigned i = 0, e = LegalFPImmediates.size(); i != e; ++i) { | |||
5439 | if (Imm.bitwiseIsEqual(LegalFPImmediates[i])) | |||
5440 | return true; | |||
5441 | } | |||
5442 | return false; | |||
5443 | } | |||
5444 | ||||
5445 | bool X86TargetLowering::shouldReduceLoadWidth(SDNode *Load, | |||
5446 | ISD::LoadExtType ExtTy, | |||
5447 | EVT NewVT) const { | |||
5448 | assert(cast<LoadSDNode>(Load)->isSimple() && "illegal to narrow")(static_cast <bool> (cast<LoadSDNode>(Load)->isSimple () && "illegal to narrow") ? void (0) : __assert_fail ("cast<LoadSDNode>(Load)->isSimple() && \"illegal to narrow\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 5448, __extension__ __PRETTY_FUNCTION__)); | |||
5449 | ||||
5450 | // "ELF Handling for Thread-Local Storage" specifies that R_X86_64_GOTTPOFF | |||
5451 | // relocation target a movq or addq instruction: don't let the load shrink. | |||
5452 | SDValue BasePtr = cast<LoadSDNode>(Load)->getBasePtr(); | |||
5453 | if (BasePtr.getOpcode() == X86ISD::WrapperRIP) | |||
5454 | if (const auto *GA = dyn_cast<GlobalAddressSDNode>(BasePtr.getOperand(0))) | |||
5455 | return GA->getTargetFlags() != X86II::MO_GOTTPOFF; | |||
5456 | ||||
5457 | // If this is an (1) AVX vector load with (2) multiple uses and (3) all of | |||
5458 | // those uses are extracted directly into a store, then the extract + store | |||
5459 | // can be store-folded. Therefore, it's probably not worth splitting the load. | |||
5460 | EVT VT = Load->getValueType(0); | |||
5461 | if ((VT.is256BitVector() || VT.is512BitVector()) && !Load->hasOneUse()) { | |||
5462 | for (auto UI = Load->use_begin(), UE = Load->use_end(); UI != UE; ++UI) { | |||
5463 | // Skip uses of the chain value. Result 0 of the node is the load value. | |||
5464 | if (UI.getUse().getResNo() != 0) | |||
5465 | continue; | |||
5466 | ||||
5467 | // If this use is not an extract + store, it's probably worth splitting. | |||
5468 | if (UI->getOpcode() != ISD::EXTRACT_SUBVECTOR || !UI->hasOneUse() || | |||
5469 | UI->use_begin()->getOpcode() != ISD::STORE) | |||
5470 | return true; | |||
5471 | } | |||
5472 | // All non-chain uses are extract + store. | |||
5473 | return false; | |||
5474 | } | |||
5475 | ||||
5476 | return true; | |||
5477 | } | |||
5478 | ||||
5479 | /// Returns true if it is beneficial to convert a load of a constant | |||
5480 | /// to just the constant itself. | |||
5481 | bool X86TargetLowering::shouldConvertConstantLoadToIntImm(const APInt &Imm, | |||
5482 | Type *Ty) const { | |||
5483 | assert(Ty->isIntegerTy())(static_cast <bool> (Ty->isIntegerTy()) ? void (0) : __assert_fail ("Ty->isIntegerTy()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 5483, __extension__ __PRETTY_FUNCTION__)); | |||
5484 | ||||
5485 | unsigned BitSize = Ty->getPrimitiveSizeInBits(); | |||
5486 | if (BitSize == 0 || BitSize > 64) | |||
5487 | return false; | |||
5488 | return true; | |||
5489 | } | |||
5490 | ||||
5491 | bool X86TargetLowering::reduceSelectOfFPConstantLoads(EVT CmpOpVT) const { | |||
5492 | // If we are using XMM registers in the ABI and the condition of the select is | |||
5493 | // a floating-point compare and we have blendv or conditional move, then it is | |||
5494 | // cheaper to select instead of doing a cross-register move and creating a | |||
5495 | // load that depends on the compare result. | |||
5496 | bool IsFPSetCC = CmpOpVT.isFloatingPoint() && CmpOpVT != MVT::f128; | |||
5497 | return !IsFPSetCC || !Subtarget.isTarget64BitLP64() || !Subtarget.hasAVX(); | |||
5498 | } | |||
5499 | ||||
5500 | bool X86TargetLowering::convertSelectOfConstantsToMath(EVT VT) const { | |||
5501 | // TODO: It might be a win to ease or lift this restriction, but the generic | |||
5502 | // folds in DAGCombiner conflict with vector folds for an AVX512 target. | |||
5503 | if (VT.isVector() && Subtarget.hasAVX512()) | |||
5504 | return false; | |||
5505 | ||||
5506 | return true; | |||
5507 | } | |||
5508 | ||||
5509 | bool X86TargetLowering::decomposeMulByConstant(LLVMContext &Context, EVT VT, | |||
5510 | SDValue C) const { | |||
5511 | // TODO: We handle scalars using custom code, but generic combining could make | |||
5512 | // that unnecessary. | |||
5513 | APInt MulC; | |||
5514 | if (!ISD::isConstantSplatVector(C.getNode(), MulC)) | |||
5515 | return false; | |||
5516 | ||||
5517 | // Find the type this will be legalized too. Otherwise we might prematurely | |||
5518 | // convert this to shl+add/sub and then still have to type legalize those ops. | |||
5519 | // Another choice would be to defer the decision for illegal types until | |||
5520 | // after type legalization. But constant splat vectors of i64 can't make it | |||
5521 | // through type legalization on 32-bit targets so we would need to special | |||
5522 | // case vXi64. | |||
5523 | while (getTypeAction(Context, VT) != TypeLegal) | |||
5524 | VT = getTypeToTransformTo(Context, VT); | |||
5525 | ||||
5526 | // If vector multiply is legal, assume that's faster than shl + add/sub. | |||
5527 | // TODO: Multiply is a complex op with higher latency and lower throughput in | |||
5528 | // most implementations, so this check could be loosened based on type | |||
5529 | // and/or a CPU attribute. | |||
5530 | if (isOperationLegal(ISD::MUL, VT)) | |||
5531 | return false; | |||
5532 | ||||
5533 | // shl+add, shl+sub, shl+add+neg | |||
5534 | return (MulC + 1).isPowerOf2() || (MulC - 1).isPowerOf2() || | |||
5535 | (1 - MulC).isPowerOf2() || (-(MulC + 1)).isPowerOf2(); | |||
5536 | } | |||
5537 | ||||
5538 | bool X86TargetLowering::isExtractSubvectorCheap(EVT ResVT, EVT SrcVT, | |||
5539 | unsigned Index) const { | |||
5540 | if (!isOperationLegalOrCustom(ISD::EXTRACT_SUBVECTOR, ResVT)) | |||
5541 | return false; | |||
5542 | ||||
5543 | // Mask vectors support all subregister combinations and operations that | |||
5544 | // extract half of vector. | |||
5545 | if (ResVT.getVectorElementType() == MVT::i1) | |||
5546 | return Index == 0 || ((ResVT.getSizeInBits() == SrcVT.getSizeInBits()*2) && | |||
5547 | (Index == ResVT.getVectorNumElements())); | |||
5548 | ||||
5549 | return (Index % ResVT.getVectorNumElements()) == 0; | |||
5550 | } | |||
5551 | ||||
5552 | bool X86TargetLowering::shouldScalarizeBinop(SDValue VecOp) const { | |||
5553 | unsigned Opc = VecOp.getOpcode(); | |||
5554 | ||||
5555 | // Assume target opcodes can't be scalarized. | |||
5556 | // TODO - do we have any exceptions? | |||
5557 | if (Opc >= ISD::BUILTIN_OP_END) | |||
5558 | return false; | |||
5559 | ||||
5560 | // If the vector op is not supported, try to convert to scalar. | |||
5561 | EVT VecVT = VecOp.getValueType(); | |||
5562 | if (!isOperationLegalOrCustomOrPromote(Opc, VecVT)) | |||
5563 | return true; | |||
5564 | ||||
5565 | // If the vector op is supported, but the scalar op is not, the transform may | |||
5566 | // not be worthwhile. | |||
5567 | EVT ScalarVT = VecVT.getScalarType(); | |||
5568 | return isOperationLegalOrCustomOrPromote(Opc, ScalarVT); | |||
5569 | } | |||
5570 | ||||
5571 | bool X86TargetLowering::shouldFormOverflowOp(unsigned Opcode, EVT VT, | |||
5572 | bool) const { | |||
5573 | // TODO: Allow vectors? | |||
5574 | if (VT.isVector()) | |||
5575 | return false; | |||
5576 | return VT.isSimple() || !isOperationExpand(Opcode, VT); | |||
5577 | } | |||
5578 | ||||
5579 | bool X86TargetLowering::isCheapToSpeculateCttz() const { | |||
5580 | // Speculate cttz only if we can directly use TZCNT. | |||
5581 | return Subtarget.hasBMI(); | |||
5582 | } | |||
5583 | ||||
5584 | bool X86TargetLowering::isCheapToSpeculateCtlz() const { | |||
5585 | // Speculate ctlz only if we can directly use LZCNT. | |||
5586 | return Subtarget.hasLZCNT(); | |||
5587 | } | |||
5588 | ||||
5589 | bool X86TargetLowering::isLoadBitCastBeneficial(EVT LoadVT, EVT BitcastVT, | |||
5590 | const SelectionDAG &DAG, | |||
5591 | const MachineMemOperand &MMO) const { | |||
5592 | if (!Subtarget.hasAVX512() && !LoadVT.isVector() && BitcastVT.isVector() && | |||
5593 | BitcastVT.getVectorElementType() == MVT::i1) | |||
5594 | return false; | |||
5595 | ||||
5596 | if (!Subtarget.hasDQI() && BitcastVT == MVT::v8i1 && LoadVT == MVT::i8) | |||
5597 | return false; | |||
5598 | ||||
5599 | // If both types are legal vectors, it's always ok to convert them. | |||
5600 | if (LoadVT.isVector() && BitcastVT.isVector() && | |||
5601 | isTypeLegal(LoadVT) && isTypeLegal(BitcastVT)) | |||
5602 | return true; | |||
5603 | ||||
5604 | return TargetLowering::isLoadBitCastBeneficial(LoadVT, BitcastVT, DAG, MMO); | |||
5605 | } | |||
5606 | ||||
5607 | bool X86TargetLowering::canMergeStoresTo(unsigned AddressSpace, EVT MemVT, | |||
5608 | const MachineFunction &MF) const { | |||
5609 | // Do not merge to float value size (128 bytes) if no implicit | |||
5610 | // float attribute is set. | |||
5611 | bool NoFloat = MF.getFunction().hasFnAttribute(Attribute::NoImplicitFloat); | |||
5612 | ||||
5613 | if (NoFloat) { | |||
5614 | unsigned MaxIntSize = Subtarget.is64Bit() ? 64 : 32; | |||
5615 | return (MemVT.getSizeInBits() <= MaxIntSize); | |||
5616 | } | |||
5617 | // Make sure we don't merge greater than our preferred vector | |||
5618 | // width. | |||
5619 | if (MemVT.getSizeInBits() > Subtarget.getPreferVectorWidth()) | |||
5620 | return false; | |||
5621 | ||||
5622 | return true; | |||
5623 | } | |||
5624 | ||||
5625 | bool X86TargetLowering::isCtlzFast() const { | |||
5626 | return Subtarget.hasFastLZCNT(); | |||
5627 | } | |||
5628 | ||||
5629 | bool X86TargetLowering::isMaskAndCmp0FoldingBeneficial( | |||
5630 | const Instruction &AndI) const { | |||
5631 | return true; | |||
5632 | } | |||
5633 | ||||
5634 | bool X86TargetLowering::hasAndNotCompare(SDValue Y) const { | |||
5635 | EVT VT = Y.getValueType(); | |||
5636 | ||||
5637 | if (VT.isVector()) | |||
5638 | return false; | |||
5639 | ||||
5640 | if (!Subtarget.hasBMI()) | |||
5641 | return false; | |||
5642 | ||||
5643 | // There are only 32-bit and 64-bit forms for 'andn'. | |||
5644 | if (VT != MVT::i32 && VT != MVT::i64) | |||
5645 | return false; | |||
5646 | ||||
5647 | return !isa<ConstantSDNode>(Y); | |||
5648 | } | |||
5649 | ||||
5650 | bool X86TargetLowering::hasAndNot(SDValue Y) const { | |||
5651 | EVT VT = Y.getValueType(); | |||
5652 | ||||
5653 | if (!VT.isVector()) | |||
5654 | return hasAndNotCompare(Y); | |||
5655 | ||||
5656 | // Vector. | |||
5657 | ||||
5658 | if (!Subtarget.hasSSE1() || VT.getSizeInBits() < 128) | |||
5659 | return false; | |||
5660 | ||||
5661 | if (VT == MVT::v4i32) | |||
5662 | return true; | |||
5663 | ||||
5664 | return Subtarget.hasSSE2(); | |||
5665 | } | |||
5666 | ||||
5667 | bool X86TargetLowering::hasBitTest(SDValue X, SDValue Y) const { | |||
5668 | return X.getValueType().isScalarInteger(); // 'bt' | |||
5669 | } | |||
5670 | ||||
5671 | bool X86TargetLowering:: | |||
5672 | shouldProduceAndByConstByHoistingConstFromShiftsLHSOfAnd( | |||
5673 | SDValue X, ConstantSDNode *XC, ConstantSDNode *CC, SDValue Y, | |||
5674 | unsigned OldShiftOpcode, unsigned NewShiftOpcode, | |||
5675 | SelectionDAG &DAG) const { | |||
5676 | // Does baseline recommend not to perform the fold by default? | |||
5677 | if (!TargetLowering::shouldProduceAndByConstByHoistingConstFromShiftsLHSOfAnd( | |||
5678 | X, XC, CC, Y, OldShiftOpcode, NewShiftOpcode, DAG)) | |||
5679 | return false; | |||
5680 | // For scalars this transform is always beneficial. | |||
5681 | if (X.getValueType().isScalarInteger()) | |||
5682 | return true; | |||
5683 | // If all the shift amounts are identical, then transform is beneficial even | |||
5684 | // with rudimentary SSE2 shifts. | |||
5685 | if (DAG.isSplatValue(Y, /*AllowUndefs=*/true)) | |||
5686 | return true; | |||
5687 | // If we have AVX2 with it's powerful shift operations, then it's also good. | |||
5688 | if (Subtarget.hasAVX2()) | |||
5689 | return true; | |||
5690 | // Pre-AVX2 vector codegen for this pattern is best for variant with 'shl'. | |||
5691 | return NewShiftOpcode == ISD::SHL; | |||
5692 | } | |||
5693 | ||||
5694 | bool X86TargetLowering::shouldFoldConstantShiftPairToMask( | |||
5695 | const SDNode *N, CombineLevel Level) const { | |||
5696 | assert(((N->getOpcode() == ISD::SHL &&(static_cast <bool> (((N->getOpcode() == ISD::SHL && N->getOperand(0).getOpcode() == ISD::SRL) || (N->getOpcode () == ISD::SRL && N->getOperand(0).getOpcode() == ISD ::SHL)) && "Expected shift-shift mask") ? void (0) : __assert_fail ("((N->getOpcode() == ISD::SHL && N->getOperand(0).getOpcode() == ISD::SRL) || (N->getOpcode() == ISD::SRL && N->getOperand(0).getOpcode() == ISD::SHL)) && \"Expected shift-shift mask\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 5700, __extension__ __PRETTY_FUNCTION__)) | |||
5697 | N->getOperand(0).getOpcode() == ISD::SRL) ||(static_cast <bool> (((N->getOpcode() == ISD::SHL && N->getOperand(0).getOpcode() == ISD::SRL) || (N->getOpcode () == ISD::SRL && N->getOperand(0).getOpcode() == ISD ::SHL)) && "Expected shift-shift mask") ? void (0) : __assert_fail ("((N->getOpcode() == ISD::SHL && N->getOperand(0).getOpcode() == ISD::SRL) || (N->getOpcode() == ISD::SRL && N->getOperand(0).getOpcode() == ISD::SHL)) && \"Expected shift-shift mask\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 5700, __extension__ __PRETTY_FUNCTION__)) | |||
5698 | (N->getOpcode() == ISD::SRL &&(static_cast <bool> (((N->getOpcode() == ISD::SHL && N->getOperand(0).getOpcode() == ISD::SRL) || (N->getOpcode () == ISD::SRL && N->getOperand(0).getOpcode() == ISD ::SHL)) && "Expected shift-shift mask") ? void (0) : __assert_fail ("((N->getOpcode() == ISD::SHL && N->getOperand(0).getOpcode() == ISD::SRL) || (N->getOpcode() == ISD::SRL && N->getOperand(0).getOpcode() == ISD::SHL)) && \"Expected shift-shift mask\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 5700, __extension__ __PRETTY_FUNCTION__)) | |||
5699 | N->getOperand(0).getOpcode() == ISD::SHL)) &&(static_cast <bool> (((N->getOpcode() == ISD::SHL && N->getOperand(0).getOpcode() == ISD::SRL) || (N->getOpcode () == ISD::SRL && N->getOperand(0).getOpcode() == ISD ::SHL)) && "Expected shift-shift mask") ? void (0) : __assert_fail ("((N->getOpcode() == ISD::SHL && N->getOperand(0).getOpcode() == ISD::SRL) || (N->getOpcode() == ISD::SRL && N->getOperand(0).getOpcode() == ISD::SHL)) && \"Expected shift-shift mask\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 5700, __extension__ __PRETTY_FUNCTION__)) | |||
5700 | "Expected shift-shift mask")(static_cast <bool> (((N->getOpcode() == ISD::SHL && N->getOperand(0).getOpcode() == ISD::SRL) || (N->getOpcode () == ISD::SRL && N->getOperand(0).getOpcode() == ISD ::SHL)) && "Expected shift-shift mask") ? void (0) : __assert_fail ("((N->getOpcode() == ISD::SHL && N->getOperand(0).getOpcode() == ISD::SRL) || (N->getOpcode() == ISD::SRL && N->getOperand(0).getOpcode() == ISD::SHL)) && \"Expected shift-shift mask\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 5700, __extension__ __PRETTY_FUNCTION__)); | |||
5701 | EVT VT = N->getValueType(0); | |||
5702 | if ((Subtarget.hasFastVectorShiftMasks() && VT.isVector()) || | |||
5703 | (Subtarget.hasFastScalarShiftMasks() && !VT.isVector())) { | |||
5704 | // Only fold if the shift values are equal - so it folds to AND. | |||
5705 | // TODO - we should fold if either is a non-uniform vector but we don't do | |||
5706 | // the fold for non-splats yet. | |||
5707 | return N->getOperand(1) == N->getOperand(0).getOperand(1); | |||
5708 | } | |||
5709 | return TargetLoweringBase::shouldFoldConstantShiftPairToMask(N, Level); | |||
5710 | } | |||
5711 | ||||
5712 | bool X86TargetLowering::shouldFoldMaskToVariableShiftPair(SDValue Y) const { | |||
5713 | EVT VT = Y.getValueType(); | |||
5714 | ||||
5715 | // For vectors, we don't have a preference, but we probably want a mask. | |||
5716 | if (VT.isVector()) | |||
5717 | return false; | |||
5718 | ||||
5719 | // 64-bit shifts on 32-bit targets produce really bad bloated code. | |||
5720 | if (VT == MVT::i64 && !Subtarget.is64Bit()) | |||
5721 | return false; | |||
5722 | ||||
5723 | return true; | |||
5724 | } | |||
5725 | ||||
5726 | bool X86TargetLowering::shouldExpandShift(SelectionDAG &DAG, | |||
5727 | SDNode *N) const { | |||
5728 | if (DAG.getMachineFunction().getFunction().hasMinSize() && | |||
5729 | !Subtarget.isOSWindows()) | |||
5730 | return false; | |||
5731 | return true; | |||
5732 | } | |||
5733 | ||||
5734 | bool X86TargetLowering::shouldSplatInsEltVarIndex(EVT VT) const { | |||
5735 | // Any legal vector type can be splatted more efficiently than | |||
5736 | // loading/spilling from memory. | |||
5737 | return isTypeLegal(VT); | |||
5738 | } | |||
5739 | ||||
5740 | MVT X86TargetLowering::hasFastEqualityCompare(unsigned NumBits) const { | |||
5741 | MVT VT = MVT::getIntegerVT(NumBits); | |||
5742 | if (isTypeLegal(VT)) | |||
5743 | return VT; | |||
5744 | ||||
5745 | // PMOVMSKB can handle this. | |||
5746 | if (NumBits == 128 && isTypeLegal(MVT::v16i8)) | |||
5747 | return MVT::v16i8; | |||
5748 | ||||
5749 | // VPMOVMSKB can handle this. | |||
5750 | if (NumBits == 256 && isTypeLegal(MVT::v32i8)) | |||
5751 | return MVT::v32i8; | |||
5752 | ||||
5753 | // TODO: Allow 64-bit type for 32-bit target. | |||
5754 | // TODO: 512-bit types should be allowed, but make sure that those | |||
5755 | // cases are handled in combineVectorSizedSetCCEquality(). | |||
5756 | ||||
5757 | return MVT::INVALID_SIMPLE_VALUE_TYPE; | |||
5758 | } | |||
5759 | ||||
5760 | /// Val is the undef sentinel value or equal to the specified value. | |||
5761 | static bool isUndefOrEqual(int Val, int CmpVal) { | |||
5762 | return ((Val == SM_SentinelUndef) || (Val == CmpVal)); | |||
5763 | } | |||
5764 | ||||
5765 | /// Return true if every element in Mask is the undef sentinel value or equal to | |||
5766 | /// the specified value.. | |||
5767 | static bool isUndefOrEqual(ArrayRef<int> Mask, int CmpVal) { | |||
5768 | return llvm::all_of(Mask, [CmpVal](int M) { | |||
5769 | return (M == SM_SentinelUndef) || (M == CmpVal); | |||
5770 | }); | |||
5771 | } | |||
5772 | ||||
5773 | /// Val is either the undef or zero sentinel value. | |||
5774 | static bool isUndefOrZero(int Val) { | |||
5775 | return ((Val == SM_SentinelUndef) || (Val == SM_SentinelZero)); | |||
5776 | } | |||
5777 | ||||
5778 | /// Return true if every element in Mask, beginning from position Pos and ending | |||
5779 | /// in Pos+Size is the undef sentinel value. | |||
5780 | static bool isUndefInRange(ArrayRef<int> Mask, unsigned Pos, unsigned Size) { | |||
5781 | return llvm::all_of(Mask.slice(Pos, Size), | |||
5782 | [](int M) { return M == SM_SentinelUndef; }); | |||
5783 | } | |||
5784 | ||||
5785 | /// Return true if the mask creates a vector whose lower half is undefined. | |||
5786 | static bool isUndefLowerHalf(ArrayRef<int> Mask) { | |||
5787 | unsigned NumElts = Mask.size(); | |||
5788 | return isUndefInRange(Mask, 0, NumElts / 2); | |||
5789 | } | |||
5790 | ||||
5791 | /// Return true if the mask creates a vector whose upper half is undefined. | |||
5792 | static bool isUndefUpperHalf(ArrayRef<int> Mask) { | |||
5793 | unsigned NumElts = Mask.size(); | |||
5794 | return isUndefInRange(Mask, NumElts / 2, NumElts / 2); | |||
5795 | } | |||
5796 | ||||
5797 | /// Return true if Val falls within the specified range (L, H]. | |||
5798 | static bool isInRange(int Val, int Low, int Hi) { | |||
5799 | return (Val >= Low && Val < Hi); | |||
5800 | } | |||
5801 | ||||
5802 | /// Return true if the value of any element in Mask falls within the specified | |||
5803 | /// range (L, H]. | |||
5804 | static bool isAnyInRange(ArrayRef<int> Mask, int Low, int Hi) { | |||
5805 | return llvm::any_of(Mask, [Low, Hi](int M) { return isInRange(M, Low, Hi); }); | |||
5806 | } | |||
5807 | ||||
5808 | /// Return true if the value of any element in Mask is the zero sentinel value. | |||
5809 | static bool isAnyZero(ArrayRef<int> Mask) { | |||
5810 | return llvm::any_of(Mask, [](int M) { return M == SM_SentinelZero; }); | |||
5811 | } | |||
5812 | ||||
5813 | /// Return true if the value of any element in Mask is the zero or undef | |||
5814 | /// sentinel values. | |||
5815 | static bool isAnyZeroOrUndef(ArrayRef<int> Mask) { | |||
5816 | return llvm::any_of(Mask, [](int M) { | |||
5817 | return M == SM_SentinelZero || M == SM_SentinelUndef; | |||
5818 | }); | |||
5819 | } | |||
5820 | ||||
5821 | /// Return true if Val is undef or if its value falls within the | |||
5822 | /// specified range (L, H]. | |||
5823 | static bool isUndefOrInRange(int Val, int Low, int Hi) { | |||
5824 | return (Val == SM_SentinelUndef) || isInRange(Val, Low, Hi); | |||
5825 | } | |||
5826 | ||||
5827 | /// Return true if every element in Mask is undef or if its value | |||
5828 | /// falls within the specified range (L, H]. | |||
5829 | static bool isUndefOrInRange(ArrayRef<int> Mask, int Low, int Hi) { | |||
5830 | return llvm::all_of( | |||
5831 | Mask, [Low, Hi](int M) { return isUndefOrInRange(M, Low, Hi); }); | |||
5832 | } | |||
5833 | ||||
5834 | /// Return true if Val is undef, zero or if its value falls within the | |||
5835 | /// specified range (L, H]. | |||
5836 | static bool isUndefOrZeroOrInRange(int Val, int Low, int Hi) { | |||
5837 | return isUndefOrZero(Val) || isInRange(Val, Low, Hi); | |||
5838 | } | |||
5839 | ||||
5840 | /// Return true if every element in Mask is undef, zero or if its value | |||
5841 | /// falls within the specified range (L, H]. | |||
5842 | static bool isUndefOrZeroOrInRange(ArrayRef<int> Mask, int Low, int Hi) { | |||
5843 | return llvm::all_of( | |||
5844 | Mask, [Low, Hi](int M) { return isUndefOrZeroOrInRange(M, Low, Hi); }); | |||
5845 | } | |||
5846 | ||||
5847 | /// Return true if every element in Mask, beginning | |||
5848 | /// from position Pos and ending in Pos + Size, falls within the specified | |||
5849 | /// sequence (Low, Low + Step, ..., Low + (Size - 1) * Step) or is undef. | |||
5850 | static bool isSequentialOrUndefInRange(ArrayRef<int> Mask, unsigned Pos, | |||
5851 | unsigned Size, int Low, int Step = 1) { | |||
5852 | for (unsigned i = Pos, e = Pos + Size; i != e; ++i, Low += Step) | |||
5853 | if (!isUndefOrEqual(Mask[i], Low)) | |||
5854 | return false; | |||
5855 | return true; | |||
5856 | } | |||
5857 | ||||
5858 | /// Return true if every element in Mask, beginning | |||
5859 | /// from position Pos and ending in Pos+Size, falls within the specified | |||
5860 | /// sequential range (Low, Low+Size], or is undef or is zero. | |||
5861 | static bool isSequentialOrUndefOrZeroInRange(ArrayRef<int> Mask, unsigned Pos, | |||
5862 | unsigned Size, int Low, | |||
5863 | int Step = 1) { | |||
5864 | for (unsigned i = Pos, e = Pos + Size; i != e; ++i, Low += Step) | |||
5865 | if (!isUndefOrZero(Mask[i]) && Mask[i] != Low) | |||
5866 | return false; | |||
5867 | return true; | |||
5868 | } | |||
5869 | ||||
5870 | /// Return true if every element in Mask, beginning | |||
5871 | /// from position Pos and ending in Pos+Size is undef or is zero. | |||
5872 | static bool isUndefOrZeroInRange(ArrayRef<int> Mask, unsigned Pos, | |||
5873 | unsigned Size) { | |||
5874 | return llvm::all_of(Mask.slice(Pos, Size), | |||
5875 | [](int M) { return isUndefOrZero(M); }); | |||
5876 | } | |||
5877 | ||||
5878 | /// Helper function to test whether a shuffle mask could be | |||
5879 | /// simplified by widening the elements being shuffled. | |||
5880 | /// | |||
5881 | /// Appends the mask for wider elements in WidenedMask if valid. Otherwise | |||
5882 | /// leaves it in an unspecified state. | |||
5883 | /// | |||
5884 | /// NOTE: This must handle normal vector shuffle masks and *target* vector | |||
5885 | /// shuffle masks. The latter have the special property of a '-2' representing | |||
5886 | /// a zero-ed lane of a vector. | |||
5887 | static bool canWidenShuffleElements(ArrayRef<int> Mask, | |||
5888 | SmallVectorImpl<int> &WidenedMask) { | |||
5889 | WidenedMask.assign(Mask.size() / 2, 0); | |||
5890 | for (int i = 0, Size = Mask.size(); i < Size; i += 2) { | |||
5891 | int M0 = Mask[i]; | |||
5892 | int M1 = Mask[i + 1]; | |||
5893 | ||||
5894 | // If both elements are undef, its trivial. | |||
5895 | if (M0 == SM_SentinelUndef && M1 == SM_SentinelUndef) { | |||
5896 | WidenedMask[i / 2] = SM_SentinelUndef; | |||
5897 | continue; | |||
5898 | } | |||
5899 | ||||
5900 | // Check for an undef mask and a mask value properly aligned to fit with | |||
5901 | // a pair of values. If we find such a case, use the non-undef mask's value. | |||
5902 | if (M0 == SM_SentinelUndef && M1 >= 0 && (M1 % 2) == 1) { | |||
5903 | WidenedMask[i / 2] = M1 / 2; | |||
5904 | continue; | |||
5905 | } | |||
5906 | if (M1 == SM_SentinelUndef && M0 >= 0 && (M0 % 2) == 0) { | |||
5907 | WidenedMask[i / 2] = M0 / 2; | |||
5908 | continue; | |||
5909 | } | |||
5910 | ||||
5911 | // When zeroing, we need to spread the zeroing across both lanes to widen. | |||
5912 | if (M0 == SM_SentinelZero || M1 == SM_SentinelZero) { | |||
5913 | if ((M0 == SM_SentinelZero || M0 == SM_SentinelUndef) && | |||
5914 | (M1 == SM_SentinelZero || M1 == SM_SentinelUndef)) { | |||
5915 | WidenedMask[i / 2] = SM_SentinelZero; | |||
5916 | continue; | |||
5917 | } | |||
5918 | return false; | |||
5919 | } | |||
5920 | ||||
5921 | // Finally check if the two mask values are adjacent and aligned with | |||
5922 | // a pair. | |||
5923 | if (M0 != SM_SentinelUndef && (M0 % 2) == 0 && (M0 + 1) == M1) { | |||
5924 | WidenedMask[i / 2] = M0 / 2; | |||
5925 | continue; | |||
5926 | } | |||
5927 | ||||
5928 | // Otherwise we can't safely widen the elements used in this shuffle. | |||
5929 | return false; | |||
5930 | } | |||
5931 | assert(WidenedMask.size() == Mask.size() / 2 &&(static_cast <bool> (WidenedMask.size() == Mask.size() / 2 && "Incorrect size of mask after widening the elements!" ) ? void (0) : __assert_fail ("WidenedMask.size() == Mask.size() / 2 && \"Incorrect size of mask after widening the elements!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 5932, __extension__ __PRETTY_FUNCTION__)) | |||
5932 | "Incorrect size of mask after widening the elements!")(static_cast <bool> (WidenedMask.size() == Mask.size() / 2 && "Incorrect size of mask after widening the elements!" ) ? void (0) : __assert_fail ("WidenedMask.size() == Mask.size() / 2 && \"Incorrect size of mask after widening the elements!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 5932, __extension__ __PRETTY_FUNCTION__)); | |||
5933 | ||||
5934 | return true; | |||
5935 | } | |||
5936 | ||||
5937 | static bool canWidenShuffleElements(ArrayRef<int> Mask, | |||
5938 | const APInt &Zeroable, | |||
5939 | bool V2IsZero, | |||
5940 | SmallVectorImpl<int> &WidenedMask) { | |||
5941 | // Create an alternative mask with info about zeroable elements. | |||
5942 | // Here we do not set undef elements as zeroable. | |||
5943 | SmallVector<int, 64> ZeroableMask(Mask.begin(), Mask.end()); | |||
5944 | if (V2IsZero) { | |||
5945 | assert(!Zeroable.isNullValue() && "V2's non-undef elements are used?!")(static_cast <bool> (!Zeroable.isNullValue() && "V2's non-undef elements are used?!") ? void (0) : __assert_fail ("!Zeroable.isNullValue() && \"V2's non-undef elements are used?!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 5945, __extension__ __PRETTY_FUNCTION__)); | |||
5946 | for (int i = 0, Size = Mask.size(); i != Size; ++i) | |||
5947 | if (Mask[i] != SM_SentinelUndef && Zeroable[i]) | |||
5948 | ZeroableMask[i] = SM_SentinelZero; | |||
5949 | } | |||
5950 | return canWidenShuffleElements(ZeroableMask, WidenedMask); | |||
5951 | } | |||
5952 | ||||
5953 | static bool canWidenShuffleElements(ArrayRef<int> Mask) { | |||
5954 | SmallVector<int, 32> WidenedMask; | |||
5955 | return canWidenShuffleElements(Mask, WidenedMask); | |||
5956 | } | |||
5957 | ||||
5958 | // Attempt to narrow/widen shuffle mask until it matches the target number of | |||
5959 | // elements. | |||
5960 | static bool scaleShuffleElements(ArrayRef<int> Mask, unsigned NumDstElts, | |||
5961 | SmallVectorImpl<int> &ScaledMask) { | |||
5962 | unsigned NumSrcElts = Mask.size(); | |||
5963 | assert(((NumSrcElts % NumDstElts) == 0 || (NumDstElts % NumSrcElts) == 0) &&(static_cast <bool> (((NumSrcElts % NumDstElts) == 0 || (NumDstElts % NumSrcElts) == 0) && "Illegal shuffle scale factor" ) ? void (0) : __assert_fail ("((NumSrcElts % NumDstElts) == 0 || (NumDstElts % NumSrcElts) == 0) && \"Illegal shuffle scale factor\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 5964, __extension__ __PRETTY_FUNCTION__)) | |||
5964 | "Illegal shuffle scale factor")(static_cast <bool> (((NumSrcElts % NumDstElts) == 0 || (NumDstElts % NumSrcElts) == 0) && "Illegal shuffle scale factor" ) ? void (0) : __assert_fail ("((NumSrcElts % NumDstElts) == 0 || (NumDstElts % NumSrcElts) == 0) && \"Illegal shuffle scale factor\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 5964, __extension__ __PRETTY_FUNCTION__)); | |||
5965 | ||||
5966 | // Narrowing is guaranteed to work. | |||
5967 | if (NumDstElts >= NumSrcElts) { | |||
5968 | int Scale = NumDstElts / NumSrcElts; | |||
5969 | llvm::narrowShuffleMaskElts(Scale, Mask, ScaledMask); | |||
5970 | return true; | |||
5971 | } | |||
5972 | ||||
5973 | // We have to repeat the widening until we reach the target size, but we can | |||
5974 | // split out the first widening as it sets up ScaledMask for us. | |||
5975 | if (canWidenShuffleElements(Mask, ScaledMask)) { | |||
5976 | while (ScaledMask.size() > NumDstElts) { | |||
5977 | SmallVector<int, 16> WidenedMask; | |||
5978 | if (!canWidenShuffleElements(ScaledMask, WidenedMask)) | |||
5979 | return false; | |||
5980 | ScaledMask = std::move(WidenedMask); | |||
5981 | } | |||
5982 | return true; | |||
5983 | } | |||
5984 | ||||
5985 | return false; | |||
5986 | } | |||
5987 | ||||
5988 | /// Returns true if Elt is a constant zero or a floating point constant +0.0. | |||
5989 | bool X86::isZeroNode(SDValue Elt) { | |||
5990 | return isNullConstant(Elt) || isNullFPConstant(Elt); | |||
5991 | } | |||
5992 | ||||
5993 | // Build a vector of constants. | |||
5994 | // Use an UNDEF node if MaskElt == -1. | |||
5995 | // Split 64-bit constants in the 32-bit mode. | |||
5996 | static SDValue getConstVector(ArrayRef<int> Values, MVT VT, SelectionDAG &DAG, | |||
5997 | const SDLoc &dl, bool IsMask = false) { | |||
5998 | ||||
5999 | SmallVector<SDValue, 32> Ops; | |||
6000 | bool Split = false; | |||
6001 | ||||
6002 | MVT ConstVecVT = VT; | |||
6003 | unsigned NumElts = VT.getVectorNumElements(); | |||
6004 | bool In64BitMode = DAG.getTargetLoweringInfo().isTypeLegal(MVT::i64); | |||
6005 | if (!In64BitMode && VT.getVectorElementType() == MVT::i64) { | |||
6006 | ConstVecVT = MVT::getVectorVT(MVT::i32, NumElts * 2); | |||
6007 | Split = true; | |||
6008 | } | |||
6009 | ||||
6010 | MVT EltVT = ConstVecVT.getVectorElementType(); | |||
6011 | for (unsigned i = 0; i < NumElts; ++i) { | |||
6012 | bool IsUndef = Values[i] < 0 && IsMask; | |||
6013 | SDValue OpNode = IsUndef ? DAG.getUNDEF(EltVT) : | |||
6014 | DAG.getConstant(Values[i], dl, EltVT); | |||
6015 | Ops.push_back(OpNode); | |||
6016 | if (Split) | |||
6017 | Ops.push_back(IsUndef ? DAG.getUNDEF(EltVT) : | |||
6018 | DAG.getConstant(0, dl, EltVT)); | |||
6019 | } | |||
6020 | SDValue ConstsNode = DAG.getBuildVector(ConstVecVT, dl, Ops); | |||
6021 | if (Split) | |||
6022 | ConstsNode = DAG.getBitcast(VT, ConstsNode); | |||
6023 | return ConstsNode; | |||
6024 | } | |||
6025 | ||||
6026 | static SDValue getConstVector(ArrayRef<APInt> Bits, APInt &Undefs, | |||
6027 | MVT VT, SelectionDAG &DAG, const SDLoc &dl) { | |||
6028 | assert(Bits.size() == Undefs.getBitWidth() &&(static_cast <bool> (Bits.size() == Undefs.getBitWidth( ) && "Unequal constant and undef arrays") ? void (0) : __assert_fail ("Bits.size() == Undefs.getBitWidth() && \"Unequal constant and undef arrays\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6029, __extension__ __PRETTY_FUNCTION__)) | |||
6029 | "Unequal constant and undef arrays")(static_cast <bool> (Bits.size() == Undefs.getBitWidth( ) && "Unequal constant and undef arrays") ? void (0) : __assert_fail ("Bits.size() == Undefs.getBitWidth() && \"Unequal constant and undef arrays\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6029, __extension__ __PRETTY_FUNCTION__)); | |||
6030 | SmallVector<SDValue, 32> Ops; | |||
6031 | bool Split = false; | |||
6032 | ||||
6033 | MVT ConstVecVT = VT; | |||
6034 | unsigned NumElts = VT.getVectorNumElements(); | |||
6035 | bool In64BitMode = DAG.getTargetLoweringInfo().isTypeLegal(MVT::i64); | |||
6036 | if (!In64BitMode && VT.getVectorElementType() == MVT::i64) { | |||
6037 | ConstVecVT = MVT::getVectorVT(MVT::i32, NumElts * 2); | |||
6038 | Split = true; | |||
6039 | } | |||
6040 | ||||
6041 | MVT EltVT = ConstVecVT.getVectorElementType(); | |||
6042 | for (unsigned i = 0, e = Bits.size(); i != e; ++i) { | |||
6043 | if (Undefs[i]) { | |||
6044 | Ops.append(Split ? 2 : 1, DAG.getUNDEF(EltVT)); | |||
6045 | continue; | |||
6046 | } | |||
6047 | const APInt &V = Bits[i]; | |||
6048 | assert(V.getBitWidth() == VT.getScalarSizeInBits() && "Unexpected sizes")(static_cast <bool> (V.getBitWidth() == VT.getScalarSizeInBits () && "Unexpected sizes") ? void (0) : __assert_fail ( "V.getBitWidth() == VT.getScalarSizeInBits() && \"Unexpected sizes\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6048, __extension__ __PRETTY_FUNCTION__)); | |||
6049 | if (Split) { | |||
6050 | Ops.push_back(DAG.getConstant(V.trunc(32), dl, EltVT)); | |||
6051 | Ops.push_back(DAG.getConstant(V.lshr(32).trunc(32), dl, EltVT)); | |||
6052 | } else if (EltVT == MVT::f32) { | |||
6053 | APFloat FV(APFloat::IEEEsingle(), V); | |||
6054 | Ops.push_back(DAG.getConstantFP(FV, dl, EltVT)); | |||
6055 | } else if (EltVT == MVT::f64) { | |||
6056 | APFloat FV(APFloat::IEEEdouble(), V); | |||
6057 | Ops.push_back(DAG.getConstantFP(FV, dl, EltVT)); | |||
6058 | } else { | |||
6059 | Ops.push_back(DAG.getConstant(V, dl, EltVT)); | |||
6060 | } | |||
6061 | } | |||
6062 | ||||
6063 | SDValue ConstsNode = DAG.getBuildVector(ConstVecVT, dl, Ops); | |||
6064 | return DAG.getBitcast(VT, ConstsNode); | |||
6065 | } | |||
6066 | ||||
6067 | /// Returns a vector of specified type with all zero elements. | |||
6068 | static SDValue getZeroVector(MVT VT, const X86Subtarget &Subtarget, | |||
6069 | SelectionDAG &DAG, const SDLoc &dl) { | |||
6070 | assert((VT.is128BitVector() || VT.is256BitVector() || VT.is512BitVector() ||(static_cast <bool> ((VT.is128BitVector() || VT.is256BitVector () || VT.is512BitVector() || VT.getVectorElementType() == MVT ::i1) && "Unexpected vector type") ? void (0) : __assert_fail ("(VT.is128BitVector() || VT.is256BitVector() || VT.is512BitVector() || VT.getVectorElementType() == MVT::i1) && \"Unexpected vector type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6072, __extension__ __PRETTY_FUNCTION__)) | |||
6071 | VT.getVectorElementType() == MVT::i1) &&(static_cast <bool> ((VT.is128BitVector() || VT.is256BitVector () || VT.is512BitVector() || VT.getVectorElementType() == MVT ::i1) && "Unexpected vector type") ? void (0) : __assert_fail ("(VT.is128BitVector() || VT.is256BitVector() || VT.is512BitVector() || VT.getVectorElementType() == MVT::i1) && \"Unexpected vector type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6072, __extension__ __PRETTY_FUNCTION__)) | |||
6072 | "Unexpected vector type")(static_cast <bool> ((VT.is128BitVector() || VT.is256BitVector () || VT.is512BitVector() || VT.getVectorElementType() == MVT ::i1) && "Unexpected vector type") ? void (0) : __assert_fail ("(VT.is128BitVector() || VT.is256BitVector() || VT.is512BitVector() || VT.getVectorElementType() == MVT::i1) && \"Unexpected vector type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6072, __extension__ __PRETTY_FUNCTION__)); | |||
6073 | ||||
6074 | // Try to build SSE/AVX zero vectors as <N x i32> bitcasted to their dest | |||
6075 | // type. This ensures they get CSE'd. But if the integer type is not | |||
6076 | // available, use a floating-point +0.0 instead. | |||
6077 | SDValue Vec; | |||
6078 | if (!Subtarget.hasSSE2() && VT.is128BitVector()) { | |||
6079 | Vec = DAG.getConstantFP(+0.0, dl, MVT::v4f32); | |||
6080 | } else if (VT.isFloatingPoint()) { | |||
6081 | Vec = DAG.getConstantFP(+0.0, dl, VT); | |||
6082 | } else if (VT.getVectorElementType() == MVT::i1) { | |||
6083 | assert((Subtarget.hasBWI() || VT.getVectorNumElements() <= 16) &&(static_cast <bool> ((Subtarget.hasBWI() || VT.getVectorNumElements () <= 16) && "Unexpected vector type") ? void (0) : __assert_fail ("(Subtarget.hasBWI() || VT.getVectorNumElements() <= 16) && \"Unexpected vector type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6084, __extension__ __PRETTY_FUNCTION__)) | |||
6084 | "Unexpected vector type")(static_cast <bool> ((Subtarget.hasBWI() || VT.getVectorNumElements () <= 16) && "Unexpected vector type") ? void (0) : __assert_fail ("(Subtarget.hasBWI() || VT.getVectorNumElements() <= 16) && \"Unexpected vector type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6084, __extension__ __PRETTY_FUNCTION__)); | |||
6085 | Vec = DAG.getConstant(0, dl, VT); | |||
6086 | } else { | |||
6087 | unsigned Num32BitElts = VT.getSizeInBits() / 32; | |||
6088 | Vec = DAG.getConstant(0, dl, MVT::getVectorVT(MVT::i32, Num32BitElts)); | |||
6089 | } | |||
6090 | return DAG.getBitcast(VT, Vec); | |||
6091 | } | |||
6092 | ||||
6093 | static SDValue extractSubVector(SDValue Vec, unsigned IdxVal, SelectionDAG &DAG, | |||
6094 | const SDLoc &dl, unsigned vectorWidth) { | |||
6095 | EVT VT = Vec.getValueType(); | |||
6096 | EVT ElVT = VT.getVectorElementType(); | |||
6097 | unsigned Factor = VT.getSizeInBits() / vectorWidth; | |||
6098 | EVT ResultVT = EVT::getVectorVT(*DAG.getContext(), ElVT, | |||
6099 | VT.getVectorNumElements() / Factor); | |||
6100 | ||||
6101 | // Extract the relevant vectorWidth bits. Generate an EXTRACT_SUBVECTOR | |||
6102 | unsigned ElemsPerChunk = vectorWidth / ElVT.getSizeInBits(); | |||
6103 | assert(isPowerOf2_32(ElemsPerChunk) && "Elements per chunk not power of 2")(static_cast <bool> (isPowerOf2_32(ElemsPerChunk) && "Elements per chunk not power of 2") ? void (0) : __assert_fail ("isPowerOf2_32(ElemsPerChunk) && \"Elements per chunk not power of 2\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6103, __extension__ __PRETTY_FUNCTION__)); | |||
6104 | ||||
6105 | // This is the index of the first element of the vectorWidth-bit chunk | |||
6106 | // we want. Since ElemsPerChunk is a power of 2 just need to clear bits. | |||
6107 | IdxVal &= ~(ElemsPerChunk - 1); | |||
6108 | ||||
6109 | // If the input is a buildvector just emit a smaller one. | |||
6110 | if (Vec.getOpcode() == ISD::BUILD_VECTOR) | |||
6111 | return DAG.getBuildVector(ResultVT, dl, | |||
6112 | Vec->ops().slice(IdxVal, ElemsPerChunk)); | |||
6113 | ||||
6114 | SDValue VecIdx = DAG.getIntPtrConstant(IdxVal, dl); | |||
6115 | return DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, ResultVT, Vec, VecIdx); | |||
6116 | } | |||
6117 | ||||
6118 | /// Generate a DAG to grab 128-bits from a vector > 128 bits. This | |||
6119 | /// sets things up to match to an AVX VEXTRACTF128 / VEXTRACTI128 | |||
6120 | /// or AVX-512 VEXTRACTF32x4 / VEXTRACTI32x4 | |||
6121 | /// instructions or a simple subregister reference. Idx is an index in the | |||
6122 | /// 128 bits we want. It need not be aligned to a 128-bit boundary. That makes | |||
6123 | /// lowering EXTRACT_VECTOR_ELT operations easier. | |||
6124 | static SDValue extract128BitVector(SDValue Vec, unsigned IdxVal, | |||
6125 | SelectionDAG &DAG, const SDLoc &dl) { | |||
6126 | assert((Vec.getValueType().is256BitVector() ||(static_cast <bool> ((Vec.getValueType().is256BitVector () || Vec.getValueType().is512BitVector()) && "Unexpected vector size!" ) ? void (0) : __assert_fail ("(Vec.getValueType().is256BitVector() || Vec.getValueType().is512BitVector()) && \"Unexpected vector size!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6127, __extension__ __PRETTY_FUNCTION__)) | |||
6127 | Vec.getValueType().is512BitVector()) && "Unexpected vector size!")(static_cast <bool> ((Vec.getValueType().is256BitVector () || Vec.getValueType().is512BitVector()) && "Unexpected vector size!" ) ? void (0) : __assert_fail ("(Vec.getValueType().is256BitVector() || Vec.getValueType().is512BitVector()) && \"Unexpected vector size!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6127, __extension__ __PRETTY_FUNCTION__)); | |||
6128 | return extractSubVector(Vec, IdxVal, DAG, dl, 128); | |||
6129 | } | |||
6130 | ||||
6131 | /// Generate a DAG to grab 256-bits from a 512-bit vector. | |||
6132 | static SDValue extract256BitVector(SDValue Vec, unsigned IdxVal, | |||
6133 | SelectionDAG &DAG, const SDLoc &dl) { | |||
6134 | assert(Vec.getValueType().is512BitVector() && "Unexpected vector size!")(static_cast <bool> (Vec.getValueType().is512BitVector( ) && "Unexpected vector size!") ? void (0) : __assert_fail ("Vec.getValueType().is512BitVector() && \"Unexpected vector size!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6134, __extension__ __PRETTY_FUNCTION__)); | |||
6135 | return extractSubVector(Vec, IdxVal, DAG, dl, 256); | |||
6136 | } | |||
6137 | ||||
6138 | static SDValue insertSubVector(SDValue Result, SDValue Vec, unsigned IdxVal, | |||
6139 | SelectionDAG &DAG, const SDLoc &dl, | |||
6140 | unsigned vectorWidth) { | |||
6141 | assert((vectorWidth == 128 || vectorWidth == 256) &&(static_cast <bool> ((vectorWidth == 128 || vectorWidth == 256) && "Unsupported vector width") ? void (0) : __assert_fail ("(vectorWidth == 128 || vectorWidth == 256) && \"Unsupported vector width\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6142, __extension__ __PRETTY_FUNCTION__)) | |||
6142 | "Unsupported vector width")(static_cast <bool> ((vectorWidth == 128 || vectorWidth == 256) && "Unsupported vector width") ? void (0) : __assert_fail ("(vectorWidth == 128 || vectorWidth == 256) && \"Unsupported vector width\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6142, __extension__ __PRETTY_FUNCTION__)); | |||
6143 | // Inserting UNDEF is Result | |||
6144 | if (Vec.isUndef()) | |||
6145 | return Result; | |||
6146 | EVT VT = Vec.getValueType(); | |||
6147 | EVT ElVT = VT.getVectorElementType(); | |||
6148 | EVT ResultVT = Result.getValueType(); | |||
6149 | ||||
6150 | // Insert the relevant vectorWidth bits. | |||
6151 | unsigned ElemsPerChunk = vectorWidth/ElVT.getSizeInBits(); | |||
6152 | assert(isPowerOf2_32(ElemsPerChunk) && "Elements per chunk not power of 2")(static_cast <bool> (isPowerOf2_32(ElemsPerChunk) && "Elements per chunk not power of 2") ? void (0) : __assert_fail ("isPowerOf2_32(ElemsPerChunk) && \"Elements per chunk not power of 2\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6152, __extension__ __PRETTY_FUNCTION__)); | |||
6153 | ||||
6154 | // This is the index of the first element of the vectorWidth-bit chunk | |||
6155 | // we want. Since ElemsPerChunk is a power of 2 just need to clear bits. | |||
6156 | IdxVal &= ~(ElemsPerChunk - 1); | |||
6157 | ||||
6158 | SDValue VecIdx = DAG.getIntPtrConstant(IdxVal, dl); | |||
6159 | return DAG.getNode(ISD::INSERT_SUBVECTOR, dl, ResultVT, Result, Vec, VecIdx); | |||
6160 | } | |||
6161 | ||||
6162 | /// Generate a DAG to put 128-bits into a vector > 128 bits. This | |||
6163 | /// sets things up to match to an AVX VINSERTF128/VINSERTI128 or | |||
6164 | /// AVX-512 VINSERTF32x4/VINSERTI32x4 instructions or a | |||
6165 | /// simple superregister reference. Idx is an index in the 128 bits | |||
6166 | /// we want. It need not be aligned to a 128-bit boundary. That makes | |||
6167 | /// lowering INSERT_VECTOR_ELT operations easier. | |||
6168 | static SDValue insert128BitVector(SDValue Result, SDValue Vec, unsigned IdxVal, | |||
6169 | SelectionDAG &DAG, const SDLoc &dl) { | |||
6170 | assert(Vec.getValueType().is128BitVector() && "Unexpected vector size!")(static_cast <bool> (Vec.getValueType().is128BitVector( ) && "Unexpected vector size!") ? void (0) : __assert_fail ("Vec.getValueType().is128BitVector() && \"Unexpected vector size!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6170, __extension__ __PRETTY_FUNCTION__)); | |||
6171 | return insertSubVector(Result, Vec, IdxVal, DAG, dl, 128); | |||
6172 | } | |||
6173 | ||||
6174 | /// Widen a vector to a larger size with the same scalar type, with the new | |||
6175 | /// elements either zero or undef. | |||
6176 | static SDValue widenSubVector(MVT VT, SDValue Vec, bool ZeroNewElements, | |||
6177 | const X86Subtarget &Subtarget, SelectionDAG &DAG, | |||
6178 | const SDLoc &dl) { | |||
6179 | assert(Vec.getValueSizeInBits().getFixedSize() < VT.getFixedSizeInBits() &&(static_cast <bool> (Vec.getValueSizeInBits().getFixedSize () < VT.getFixedSizeInBits() && Vec.getValueType() .getScalarType() == VT.getScalarType() && "Unsupported vector widening type" ) ? void (0) : __assert_fail ("Vec.getValueSizeInBits().getFixedSize() < VT.getFixedSizeInBits() && Vec.getValueType().getScalarType() == VT.getScalarType() && \"Unsupported vector widening type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6181, __extension__ __PRETTY_FUNCTION__)) | |||
6180 | Vec.getValueType().getScalarType() == VT.getScalarType() &&(static_cast <bool> (Vec.getValueSizeInBits().getFixedSize () < VT.getFixedSizeInBits() && Vec.getValueType() .getScalarType() == VT.getScalarType() && "Unsupported vector widening type" ) ? void (0) : __assert_fail ("Vec.getValueSizeInBits().getFixedSize() < VT.getFixedSizeInBits() && Vec.getValueType().getScalarType() == VT.getScalarType() && \"Unsupported vector widening type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6181, __extension__ __PRETTY_FUNCTION__)) | |||
6181 | "Unsupported vector widening type")(static_cast <bool> (Vec.getValueSizeInBits().getFixedSize () < VT.getFixedSizeInBits() && Vec.getValueType() .getScalarType() == VT.getScalarType() && "Unsupported vector widening type" ) ? void (0) : __assert_fail ("Vec.getValueSizeInBits().getFixedSize() < VT.getFixedSizeInBits() && Vec.getValueType().getScalarType() == VT.getScalarType() && \"Unsupported vector widening type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6181, __extension__ __PRETTY_FUNCTION__)); | |||
6182 | SDValue Res = ZeroNewElements ? getZeroVector(VT, Subtarget, DAG, dl) | |||
6183 | : DAG.getUNDEF(VT); | |||
6184 | return DAG.getNode(ISD::INSERT_SUBVECTOR, dl, VT, Res, Vec, | |||
6185 | DAG.getIntPtrConstant(0, dl)); | |||
6186 | } | |||
6187 | ||||
6188 | /// Widen a vector to a larger size with the same scalar type, with the new | |||
6189 | /// elements either zero or undef. | |||
6190 | static SDValue widenSubVector(SDValue Vec, bool ZeroNewElements, | |||
6191 | const X86Subtarget &Subtarget, SelectionDAG &DAG, | |||
6192 | const SDLoc &dl, unsigned WideSizeInBits) { | |||
6193 | assert(Vec.getValueSizeInBits() < WideSizeInBits &&(static_cast <bool> (Vec.getValueSizeInBits() < WideSizeInBits && (WideSizeInBits % Vec.getScalarValueSizeInBits()) == 0 && "Unsupported vector widening type") ? void ( 0) : __assert_fail ("Vec.getValueSizeInBits() < WideSizeInBits && (WideSizeInBits % Vec.getScalarValueSizeInBits()) == 0 && \"Unsupported vector widening type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6195, __extension__ __PRETTY_FUNCTION__)) | |||
6194 | (WideSizeInBits % Vec.getScalarValueSizeInBits()) == 0 &&(static_cast <bool> (Vec.getValueSizeInBits() < WideSizeInBits && (WideSizeInBits % Vec.getScalarValueSizeInBits()) == 0 && "Unsupported vector widening type") ? void ( 0) : __assert_fail ("Vec.getValueSizeInBits() < WideSizeInBits && (WideSizeInBits % Vec.getScalarValueSizeInBits()) == 0 && \"Unsupported vector widening type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6195, __extension__ __PRETTY_FUNCTION__)) | |||
6195 | "Unsupported vector widening type")(static_cast <bool> (Vec.getValueSizeInBits() < WideSizeInBits && (WideSizeInBits % Vec.getScalarValueSizeInBits()) == 0 && "Unsupported vector widening type") ? void ( 0) : __assert_fail ("Vec.getValueSizeInBits() < WideSizeInBits && (WideSizeInBits % Vec.getScalarValueSizeInBits()) == 0 && \"Unsupported vector widening type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6195, __extension__ __PRETTY_FUNCTION__)); | |||
6196 | unsigned WideNumElts = WideSizeInBits / Vec.getScalarValueSizeInBits(); | |||
6197 | MVT SVT = Vec.getSimpleValueType().getScalarType(); | |||
6198 | MVT VT = MVT::getVectorVT(SVT, WideNumElts); | |||
6199 | return widenSubVector(VT, Vec, ZeroNewElements, Subtarget, DAG, dl); | |||
6200 | } | |||
6201 | ||||
6202 | // Helper function to collect subvector ops that are concatenated together, | |||
6203 | // either by ISD::CONCAT_VECTORS or a ISD::INSERT_SUBVECTOR series. | |||
6204 | // The subvectors in Ops are guaranteed to be the same type. | |||
6205 | static bool collectConcatOps(SDNode *N, SmallVectorImpl<SDValue> &Ops) { | |||
6206 | assert(Ops.empty() && "Expected an empty ops vector")(static_cast <bool> (Ops.empty() && "Expected an empty ops vector" ) ? void (0) : __assert_fail ("Ops.empty() && \"Expected an empty ops vector\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6206, __extension__ __PRETTY_FUNCTION__)); | |||
6207 | ||||
6208 | if (N->getOpcode() == ISD::CONCAT_VECTORS) { | |||
6209 | Ops.append(N->op_begin(), N->op_end()); | |||
6210 | return true; | |||
6211 | } | |||
6212 | ||||
6213 | if (N->getOpcode() == ISD::INSERT_SUBVECTOR) { | |||
6214 | SDValue Src = N->getOperand(0); | |||
6215 | SDValue Sub = N->getOperand(1); | |||
6216 | const APInt &Idx = N->getConstantOperandAPInt(2); | |||
6217 | EVT VT = Src.getValueType(); | |||
6218 | EVT SubVT = Sub.getValueType(); | |||
6219 | ||||
6220 | // TODO - Handle more general insert_subvector chains. | |||
6221 | if (VT.getSizeInBits() == (SubVT.getSizeInBits() * 2) && | |||
6222 | Idx == (VT.getVectorNumElements() / 2)) { | |||
6223 | // insert_subvector(insert_subvector(undef, x, lo), y, hi) | |||
6224 | if (Src.getOpcode() == ISD::INSERT_SUBVECTOR && | |||
6225 | Src.getOperand(1).getValueType() == SubVT && | |||
6226 | isNullConstant(Src.getOperand(2))) { | |||
6227 | Ops.push_back(Src.getOperand(1)); | |||
6228 | Ops.push_back(Sub); | |||
6229 | return true; | |||
6230 | } | |||
6231 | // insert_subvector(x, extract_subvector(x, lo), hi) | |||
6232 | if (Sub.getOpcode() == ISD::EXTRACT_SUBVECTOR && | |||
6233 | Sub.getOperand(0) == Src && isNullConstant(Sub.getOperand(1))) { | |||
6234 | Ops.append(2, Sub); | |||
6235 | return true; | |||
6236 | } | |||
6237 | } | |||
6238 | } | |||
6239 | ||||
6240 | return false; | |||
6241 | } | |||
6242 | ||||
6243 | static std::pair<SDValue, SDValue> splitVector(SDValue Op, SelectionDAG &DAG, | |||
6244 | const SDLoc &dl) { | |||
6245 | EVT VT = Op.getValueType(); | |||
6246 | unsigned NumElems = VT.getVectorNumElements(); | |||
6247 | unsigned SizeInBits = VT.getSizeInBits(); | |||
6248 | assert((NumElems % 2) == 0 && (SizeInBits % 2) == 0 &&(static_cast <bool> ((NumElems % 2) == 0 && (SizeInBits % 2) == 0 && "Can't split odd sized vector") ? void ( 0) : __assert_fail ("(NumElems % 2) == 0 && (SizeInBits % 2) == 0 && \"Can't split odd sized vector\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6249, __extension__ __PRETTY_FUNCTION__)) | |||
6249 | "Can't split odd sized vector")(static_cast <bool> ((NumElems % 2) == 0 && (SizeInBits % 2) == 0 && "Can't split odd sized vector") ? void ( 0) : __assert_fail ("(NumElems % 2) == 0 && (SizeInBits % 2) == 0 && \"Can't split odd sized vector\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6249, __extension__ __PRETTY_FUNCTION__)); | |||
6250 | ||||
6251 | SDValue Lo = extractSubVector(Op, 0, DAG, dl, SizeInBits / 2); | |||
6252 | SDValue Hi = extractSubVector(Op, NumElems / 2, DAG, dl, SizeInBits / 2); | |||
6253 | return std::make_pair(Lo, Hi); | |||
6254 | } | |||
6255 | ||||
6256 | // Split an unary integer op into 2 half sized ops. | |||
6257 | static SDValue splitVectorIntUnary(SDValue Op, SelectionDAG &DAG) { | |||
6258 | EVT VT = Op.getValueType(); | |||
6259 | ||||
6260 | // Make sure we only try to split 256/512-bit types to avoid creating | |||
6261 | // narrow vectors. | |||
6262 | assert((Op.getOperand(0).getValueType().is256BitVector() ||(static_cast <bool> ((Op.getOperand(0).getValueType().is256BitVector () || Op.getOperand(0).getValueType().is512BitVector()) && (VT.is256BitVector() || VT.is512BitVector()) && "Unsupported VT!" ) ? void (0) : __assert_fail ("(Op.getOperand(0).getValueType().is256BitVector() || Op.getOperand(0).getValueType().is512BitVector()) && (VT.is256BitVector() || VT.is512BitVector()) && \"Unsupported VT!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6264, __extension__ __PRETTY_FUNCTION__)) | |||
6263 | Op.getOperand(0).getValueType().is512BitVector()) &&(static_cast <bool> ((Op.getOperand(0).getValueType().is256BitVector () || Op.getOperand(0).getValueType().is512BitVector()) && (VT.is256BitVector() || VT.is512BitVector()) && "Unsupported VT!" ) ? void (0) : __assert_fail ("(Op.getOperand(0).getValueType().is256BitVector() || Op.getOperand(0).getValueType().is512BitVector()) && (VT.is256BitVector() || VT.is512BitVector()) && \"Unsupported VT!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6264, __extension__ __PRETTY_FUNCTION__)) | |||
6264 | (VT.is256BitVector() || VT.is512BitVector()) && "Unsupported VT!")(static_cast <bool> ((Op.getOperand(0).getValueType().is256BitVector () || Op.getOperand(0).getValueType().is512BitVector()) && (VT.is256BitVector() || VT.is512BitVector()) && "Unsupported VT!" ) ? void (0) : __assert_fail ("(Op.getOperand(0).getValueType().is256BitVector() || Op.getOperand(0).getValueType().is512BitVector()) && (VT.is256BitVector() || VT.is512BitVector()) && \"Unsupported VT!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6264, __extension__ __PRETTY_FUNCTION__)); | |||
6265 | assert(Op.getOperand(0).getValueType().getVectorNumElements() ==(static_cast <bool> (Op.getOperand(0).getValueType().getVectorNumElements () == VT.getVectorNumElements() && "Unexpected VTs!") ? void (0) : __assert_fail ("Op.getOperand(0).getValueType().getVectorNumElements() == VT.getVectorNumElements() && \"Unexpected VTs!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6267, __extension__ __PRETTY_FUNCTION__)) | |||
6266 | VT.getVectorNumElements() &&(static_cast <bool> (Op.getOperand(0).getValueType().getVectorNumElements () == VT.getVectorNumElements() && "Unexpected VTs!") ? void (0) : __assert_fail ("Op.getOperand(0).getValueType().getVectorNumElements() == VT.getVectorNumElements() && \"Unexpected VTs!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6267, __extension__ __PRETTY_FUNCTION__)) | |||
6267 | "Unexpected VTs!")(static_cast <bool> (Op.getOperand(0).getValueType().getVectorNumElements () == VT.getVectorNumElements() && "Unexpected VTs!") ? void (0) : __assert_fail ("Op.getOperand(0).getValueType().getVectorNumElements() == VT.getVectorNumElements() && \"Unexpected VTs!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6267, __extension__ __PRETTY_FUNCTION__)); | |||
6268 | ||||
6269 | SDLoc dl(Op); | |||
6270 | ||||
6271 | // Extract the Lo/Hi vectors | |||
6272 | SDValue Lo, Hi; | |||
6273 | std::tie(Lo, Hi) = splitVector(Op.getOperand(0), DAG, dl); | |||
6274 | ||||
6275 | EVT LoVT, HiVT; | |||
6276 | std::tie(LoVT, HiVT) = DAG.GetSplitDestVTs(VT); | |||
6277 | return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, | |||
6278 | DAG.getNode(Op.getOpcode(), dl, LoVT, Lo), | |||
6279 | DAG.getNode(Op.getOpcode(), dl, HiVT, Hi)); | |||
6280 | } | |||
6281 | ||||
6282 | /// Break a binary integer operation into 2 half sized ops and then | |||
6283 | /// concatenate the result back. | |||
6284 | static SDValue splitVectorIntBinary(SDValue Op, SelectionDAG &DAG) { | |||
6285 | EVT VT = Op.getValueType(); | |||
6286 | ||||
6287 | // Sanity check that all the types match. | |||
6288 | assert(Op.getOperand(0).getValueType() == VT &&(static_cast <bool> (Op.getOperand(0).getValueType() == VT && Op.getOperand(1).getValueType() == VT && "Unexpected VTs!") ? void (0) : __assert_fail ("Op.getOperand(0).getValueType() == VT && Op.getOperand(1).getValueType() == VT && \"Unexpected VTs!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6289, __extension__ __PRETTY_FUNCTION__)) | |||
6289 | Op.getOperand(1).getValueType() == VT && "Unexpected VTs!")(static_cast <bool> (Op.getOperand(0).getValueType() == VT && Op.getOperand(1).getValueType() == VT && "Unexpected VTs!") ? void (0) : __assert_fail ("Op.getOperand(0).getValueType() == VT && Op.getOperand(1).getValueType() == VT && \"Unexpected VTs!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6289, __extension__ __PRETTY_FUNCTION__)); | |||
6290 | assert((VT.is256BitVector() || VT.is512BitVector()) && "Unsupported VT!")(static_cast <bool> ((VT.is256BitVector() || VT.is512BitVector ()) && "Unsupported VT!") ? void (0) : __assert_fail ( "(VT.is256BitVector() || VT.is512BitVector()) && \"Unsupported VT!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6290, __extension__ __PRETTY_FUNCTION__)); | |||
6291 | ||||
6292 | SDLoc dl(Op); | |||
6293 | ||||
6294 | // Extract the LHS Lo/Hi vectors | |||
6295 | SDValue LHS1, LHS2; | |||
6296 | std::tie(LHS1, LHS2) = splitVector(Op.getOperand(0), DAG, dl); | |||
6297 | ||||
6298 | // Extract the RHS Lo/Hi vectors | |||
6299 | SDValue RHS1, RHS2; | |||
6300 | std::tie(RHS1, RHS2) = splitVector(Op.getOperand(1), DAG, dl); | |||
6301 | ||||
6302 | EVT LoVT, HiVT; | |||
6303 | std::tie(LoVT, HiVT) = DAG.GetSplitDestVTs(VT); | |||
6304 | return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, | |||
6305 | DAG.getNode(Op.getOpcode(), dl, LoVT, LHS1, RHS1), | |||
6306 | DAG.getNode(Op.getOpcode(), dl, HiVT, LHS2, RHS2)); | |||
6307 | } | |||
6308 | ||||
6309 | // Helper for splitting operands of an operation to legal target size and | |||
6310 | // apply a function on each part. | |||
6311 | // Useful for operations that are available on SSE2 in 128-bit, on AVX2 in | |||
6312 | // 256-bit and on AVX512BW in 512-bit. The argument VT is the type used for | |||
6313 | // deciding if/how to split Ops. Ops elements do *not* have to be of type VT. | |||
6314 | // The argument Builder is a function that will be applied on each split part: | |||
6315 | // SDValue Builder(SelectionDAG&G, SDLoc, ArrayRef<SDValue>) | |||
6316 | template <typename F> | |||
6317 | SDValue SplitOpsAndApply(SelectionDAG &DAG, const X86Subtarget &Subtarget, | |||
6318 | const SDLoc &DL, EVT VT, ArrayRef<SDValue> Ops, | |||
6319 | F Builder, bool CheckBWI = true) { | |||
6320 | assert(Subtarget.hasSSE2() && "Target assumed to support at least SSE2")(static_cast <bool> (Subtarget.hasSSE2() && "Target assumed to support at least SSE2" ) ? void (0) : __assert_fail ("Subtarget.hasSSE2() && \"Target assumed to support at least SSE2\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6320, __extension__ __PRETTY_FUNCTION__)); | |||
6321 | unsigned NumSubs = 1; | |||
6322 | if ((CheckBWI && Subtarget.useBWIRegs()) || | |||
6323 | (!CheckBWI && Subtarget.useAVX512Regs())) { | |||
6324 | if (VT.getSizeInBits() > 512) { | |||
6325 | NumSubs = VT.getSizeInBits() / 512; | |||
6326 | assert((VT.getSizeInBits() % 512) == 0 && "Illegal vector size")(static_cast <bool> ((VT.getSizeInBits() % 512) == 0 && "Illegal vector size") ? void (0) : __assert_fail ("(VT.getSizeInBits() % 512) == 0 && \"Illegal vector size\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6326, __extension__ __PRETTY_FUNCTION__)); | |||
6327 | } | |||
6328 | } else if (Subtarget.hasAVX2()) { | |||
6329 | if (VT.getSizeInBits() > 256) { | |||
6330 | NumSubs = VT.getSizeInBits() / 256; | |||
6331 | assert((VT.getSizeInBits() % 256) == 0 && "Illegal vector size")(static_cast <bool> ((VT.getSizeInBits() % 256) == 0 && "Illegal vector size") ? void (0) : __assert_fail ("(VT.getSizeInBits() % 256) == 0 && \"Illegal vector size\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6331, __extension__ __PRETTY_FUNCTION__)); | |||
6332 | } | |||
6333 | } else { | |||
6334 | if (VT.getSizeInBits() > 128) { | |||
6335 | NumSubs = VT.getSizeInBits() / 128; | |||
6336 | assert((VT.getSizeInBits() % 128) == 0 && "Illegal vector size")(static_cast <bool> ((VT.getSizeInBits() % 128) == 0 && "Illegal vector size") ? void (0) : __assert_fail ("(VT.getSizeInBits() % 128) == 0 && \"Illegal vector size\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6336, __extension__ __PRETTY_FUNCTION__)); | |||
6337 | } | |||
6338 | } | |||
6339 | ||||
6340 | if (NumSubs == 1) | |||
6341 | return Builder(DAG, DL, Ops); | |||
6342 | ||||
6343 | SmallVector<SDValue, 4> Subs; | |||
6344 | for (unsigned i = 0; i != NumSubs; ++i) { | |||
6345 | SmallVector<SDValue, 2> SubOps; | |||
6346 | for (SDValue Op : Ops) { | |||
6347 | EVT OpVT = Op.getValueType(); | |||
6348 | unsigned NumSubElts = OpVT.getVectorNumElements() / NumSubs; | |||
6349 | unsigned SizeSub = OpVT.getSizeInBits() / NumSubs; | |||
6350 | SubOps.push_back(extractSubVector(Op, i * NumSubElts, DAG, DL, SizeSub)); | |||
6351 | } | |||
6352 | Subs.push_back(Builder(DAG, DL, SubOps)); | |||
6353 | } | |||
6354 | return DAG.getNode(ISD::CONCAT_VECTORS, DL, VT, Subs); | |||
6355 | } | |||
6356 | ||||
6357 | /// Insert i1-subvector to i1-vector. | |||
6358 | static SDValue insert1BitVector(SDValue Op, SelectionDAG &DAG, | |||
6359 | const X86Subtarget &Subtarget) { | |||
6360 | ||||
6361 | SDLoc dl(Op); | |||
6362 | SDValue Vec = Op.getOperand(0); | |||
6363 | SDValue SubVec = Op.getOperand(1); | |||
6364 | SDValue Idx = Op.getOperand(2); | |||
6365 | unsigned IdxVal = Op.getConstantOperandVal(2); | |||
6366 | ||||
6367 | // Inserting undef is a nop. We can just return the original vector. | |||
6368 | if (SubVec.isUndef()) | |||
6369 | return Vec; | |||
6370 | ||||
6371 | if (IdxVal == 0 && Vec.isUndef()) // the operation is legal | |||
6372 | return Op; | |||
6373 | ||||
6374 | MVT OpVT = Op.getSimpleValueType(); | |||
6375 | unsigned NumElems = OpVT.getVectorNumElements(); | |||
6376 | SDValue ZeroIdx = DAG.getIntPtrConstant(0, dl); | |||
6377 | ||||
6378 | // Extend to natively supported kshift. | |||
6379 | MVT WideOpVT = OpVT; | |||
6380 | if ((!Subtarget.hasDQI() && NumElems == 8) || NumElems < 8) | |||
6381 | WideOpVT = Subtarget.hasDQI() ? MVT::v8i1 : MVT::v16i1; | |||
6382 | ||||
6383 | // Inserting into the lsbs of a zero vector is legal. ISel will insert shifts | |||
6384 | // if necessary. | |||
6385 | if (IdxVal == 0 && ISD::isBuildVectorAllZeros(Vec.getNode())) { | |||
6386 | // May need to promote to a legal type. | |||
6387 | Op = DAG.getNode(ISD::INSERT_SUBVECTOR, dl, WideOpVT, | |||
6388 | DAG.getConstant(0, dl, WideOpVT), | |||
6389 | SubVec, Idx); | |||
6390 | return DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, OpVT, Op, ZeroIdx); | |||
6391 | } | |||
6392 | ||||
6393 | MVT SubVecVT = SubVec.getSimpleValueType(); | |||
6394 | unsigned SubVecNumElems = SubVecVT.getVectorNumElements(); | |||
6395 | assert(IdxVal + SubVecNumElems <= NumElems &&(static_cast <bool> (IdxVal + SubVecNumElems <= NumElems && IdxVal % SubVecVT.getSizeInBits() == 0 && "Unexpected index value in INSERT_SUBVECTOR") ? void (0) : __assert_fail ("IdxVal + SubVecNumElems <= NumElems && IdxVal % SubVecVT.getSizeInBits() == 0 && \"Unexpected index value in INSERT_SUBVECTOR\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6397, __extension__ __PRETTY_FUNCTION__)) | |||
6396 | IdxVal % SubVecVT.getSizeInBits() == 0 &&(static_cast <bool> (IdxVal + SubVecNumElems <= NumElems && IdxVal % SubVecVT.getSizeInBits() == 0 && "Unexpected index value in INSERT_SUBVECTOR") ? void (0) : __assert_fail ("IdxVal + SubVecNumElems <= NumElems && IdxVal % SubVecVT.getSizeInBits() == 0 && \"Unexpected index value in INSERT_SUBVECTOR\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6397, __extension__ __PRETTY_FUNCTION__)) | |||
6397 | "Unexpected index value in INSERT_SUBVECTOR")(static_cast <bool> (IdxVal + SubVecNumElems <= NumElems && IdxVal % SubVecVT.getSizeInBits() == 0 && "Unexpected index value in INSERT_SUBVECTOR") ? void (0) : __assert_fail ("IdxVal + SubVecNumElems <= NumElems && IdxVal % SubVecVT.getSizeInBits() == 0 && \"Unexpected index value in INSERT_SUBVECTOR\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6397, __extension__ __PRETTY_FUNCTION__)); | |||
6398 | ||||
6399 | SDValue Undef = DAG.getUNDEF(WideOpVT); | |||
6400 | ||||
6401 | if (IdxVal == 0) { | |||
6402 | // Zero lower bits of the Vec | |||
6403 | SDValue ShiftBits = DAG.getTargetConstant(SubVecNumElems, dl, MVT::i8); | |||
6404 | Vec = DAG.getNode(ISD::INSERT_SUBVECTOR, dl, WideOpVT, Undef, Vec, | |||
6405 | ZeroIdx); | |||
6406 | Vec = DAG.getNode(X86ISD::KSHIFTR, dl, WideOpVT, Vec, ShiftBits); | |||
6407 | Vec = DAG.getNode(X86ISD::KSHIFTL, dl, WideOpVT, Vec, ShiftBits); | |||
6408 | // Merge them together, SubVec should be zero extended. | |||
6409 | SubVec = DAG.getNode(ISD::INSERT_SUBVECTOR, dl, WideOpVT, | |||
6410 | DAG.getConstant(0, dl, WideOpVT), | |||
6411 | SubVec, ZeroIdx); | |||
6412 | Op = DAG.getNode(ISD::OR, dl, WideOpVT, Vec, SubVec); | |||
6413 | return DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, OpVT, Op, ZeroIdx); | |||
6414 | } | |||
6415 | ||||
6416 | SubVec = DAG.getNode(ISD::INSERT_SUBVECTOR, dl, WideOpVT, | |||
6417 | Undef, SubVec, ZeroIdx); | |||
6418 | ||||
6419 | if (Vec.isUndef()) { | |||
6420 | assert(IdxVal != 0 && "Unexpected index")(static_cast <bool> (IdxVal != 0 && "Unexpected index" ) ? void (0) : __assert_fail ("IdxVal != 0 && \"Unexpected index\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6420, __extension__ __PRETTY_FUNCTION__)); | |||
6421 | SubVec = DAG.getNode(X86ISD::KSHIFTL, dl, WideOpVT, SubVec, | |||
6422 | DAG.getTargetConstant(IdxVal, dl, MVT::i8)); | |||
6423 | return DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, OpVT, SubVec, ZeroIdx); | |||
6424 | } | |||
6425 | ||||
6426 | if (ISD::isBuildVectorAllZeros(Vec.getNode())) { | |||
6427 | assert(IdxVal != 0 && "Unexpected index")(static_cast <bool> (IdxVal != 0 && "Unexpected index" ) ? void (0) : __assert_fail ("IdxVal != 0 && \"Unexpected index\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6427, __extension__ __PRETTY_FUNCTION__)); | |||
6428 | // If upper elements of Vec are known undef, then just shift into place. | |||
6429 | if (llvm::all_of(Vec->ops().slice(IdxVal + SubVecNumElems), | |||
6430 | [](SDValue V) { return V.isUndef(); })) { | |||
6431 | SubVec = DAG.getNode(X86ISD::KSHIFTL, dl, WideOpVT, SubVec, | |||
6432 | DAG.getTargetConstant(IdxVal, dl, MVT::i8)); | |||
6433 | } else { | |||
6434 | NumElems = WideOpVT.getVectorNumElements(); | |||
6435 | unsigned ShiftLeft = NumElems - SubVecNumElems; | |||
6436 | unsigned ShiftRight = NumElems - SubVecNumElems - IdxVal; | |||
6437 | SubVec = DAG.getNode(X86ISD::KSHIFTL, dl, WideOpVT, SubVec, | |||
6438 | DAG.getTargetConstant(ShiftLeft, dl, MVT::i8)); | |||
6439 | if (ShiftRight != 0) | |||
6440 | SubVec = DAG.getNode(X86ISD::KSHIFTR, dl, WideOpVT, SubVec, | |||
6441 | DAG.getTargetConstant(ShiftRight, dl, MVT::i8)); | |||
6442 | } | |||
6443 | return DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, OpVT, SubVec, ZeroIdx); | |||
6444 | } | |||
6445 | ||||
6446 | // Simple case when we put subvector in the upper part | |||
6447 | if (IdxVal + SubVecNumElems == NumElems) { | |||
6448 | SubVec = DAG.getNode(X86ISD::KSHIFTL, dl, WideOpVT, SubVec, | |||
6449 | DAG.getTargetConstant(IdxVal, dl, MVT::i8)); | |||
6450 | if (SubVecNumElems * 2 == NumElems) { | |||
6451 | // Special case, use legal zero extending insert_subvector. This allows | |||
6452 | // isel to optimize when bits are known zero. | |||
6453 | Vec = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, SubVecVT, Vec, ZeroIdx); | |||
6454 | Vec = DAG.getNode(ISD::INSERT_SUBVECTOR, dl, WideOpVT, | |||
6455 | DAG.getConstant(0, dl, WideOpVT), | |||
6456 | Vec, ZeroIdx); | |||
6457 | } else { | |||
6458 | // Otherwise use explicit shifts to zero the bits. | |||
6459 | Vec = DAG.getNode(ISD::INSERT_SUBVECTOR, dl, WideOpVT, | |||
6460 | Undef, Vec, ZeroIdx); | |||
6461 | NumElems = WideOpVT.getVectorNumElements(); | |||
6462 | SDValue ShiftBits = DAG.getTargetConstant(NumElems - IdxVal, dl, MVT::i8); | |||
6463 | Vec = DAG.getNode(X86ISD::KSHIFTL, dl, WideOpVT, Vec, ShiftBits); | |||
6464 | Vec = DAG.getNode(X86ISD::KSHIFTR, dl, WideOpVT, Vec, ShiftBits); | |||
6465 | } | |||
6466 | Op = DAG.getNode(ISD::OR, dl, WideOpVT, Vec, SubVec); | |||
6467 | return DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, OpVT, Op, ZeroIdx); | |||
6468 | } | |||
6469 | ||||
6470 | // Inserting into the middle is more complicated. | |||
6471 | ||||
6472 | NumElems = WideOpVT.getVectorNumElements(); | |||
6473 | ||||
6474 | // Widen the vector if needed. | |||
6475 | Vec = DAG.getNode(ISD::INSERT_SUBVECTOR, dl, WideOpVT, Undef, Vec, ZeroIdx); | |||
6476 | ||||
6477 | unsigned ShiftLeft = NumElems - SubVecNumElems; | |||
6478 | unsigned ShiftRight = NumElems - SubVecNumElems - IdxVal; | |||
6479 | ||||
6480 | // Do an optimization for the the most frequently used types. | |||
6481 | if (WideOpVT != MVT::v64i1 || Subtarget.is64Bit()) { | |||
6482 | APInt Mask0 = APInt::getBitsSet(NumElems, IdxVal, IdxVal + SubVecNumElems); | |||
6483 | Mask0.flipAllBits(); | |||
6484 | SDValue CMask0 = DAG.getConstant(Mask0, dl, MVT::getIntegerVT(NumElems)); | |||
6485 | SDValue VMask0 = DAG.getNode(ISD::BITCAST, dl, WideOpVT, CMask0); | |||
6486 | Vec = DAG.getNode(ISD::AND, dl, WideOpVT, Vec, VMask0); | |||
6487 | SubVec = DAG.getNode(X86ISD::KSHIFTL, dl, WideOpVT, SubVec, | |||
6488 | DAG.getTargetConstant(ShiftLeft, dl, MVT::i8)); | |||
6489 | SubVec = DAG.getNode(X86ISD::KSHIFTR, dl, WideOpVT, SubVec, | |||
6490 | DAG.getTargetConstant(ShiftRight, dl, MVT::i8)); | |||
6491 | Op = DAG.getNode(ISD::OR, dl, WideOpVT, Vec, SubVec); | |||
6492 | ||||
6493 | // Reduce to original width if needed. | |||
6494 | return DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, OpVT, Op, ZeroIdx); | |||
6495 | } | |||
6496 | ||||
6497 | // Clear the upper bits of the subvector and move it to its insert position. | |||
6498 | SubVec = DAG.getNode(X86ISD::KSHIFTL, dl, WideOpVT, SubVec, | |||
6499 | DAG.getTargetConstant(ShiftLeft, dl, MVT::i8)); | |||
6500 | SubVec = DAG.getNode(X86ISD::KSHIFTR, dl, WideOpVT, SubVec, | |||
6501 | DAG.getTargetConstant(ShiftRight, dl, MVT::i8)); | |||
6502 | ||||
6503 | // Isolate the bits below the insertion point. | |||
6504 | unsigned LowShift = NumElems - IdxVal; | |||
6505 | SDValue Low = DAG.getNode(X86ISD::KSHIFTL, dl, WideOpVT, Vec, | |||
6506 | DAG.getTargetConstant(LowShift, dl, MVT::i8)); | |||
6507 | Low = DAG.getNode(X86ISD::KSHIFTR, dl, WideOpVT, Low, | |||
6508 | DAG.getTargetConstant(LowShift, dl, MVT::i8)); | |||
6509 | ||||
6510 | // Isolate the bits after the last inserted bit. | |||
6511 | unsigned HighShift = IdxVal + SubVecNumElems; | |||
6512 | SDValue High = DAG.getNode(X86ISD::KSHIFTR, dl, WideOpVT, Vec, | |||
6513 | DAG.getTargetConstant(HighShift, dl, MVT::i8)); | |||
6514 | High = DAG.getNode(X86ISD::KSHIFTL, dl, WideOpVT, High, | |||
6515 | DAG.getTargetConstant(HighShift, dl, MVT::i8)); | |||
6516 | ||||
6517 | // Now OR all 3 pieces together. | |||
6518 | Vec = DAG.getNode(ISD::OR, dl, WideOpVT, Low, High); | |||
6519 | SubVec = DAG.getNode(ISD::OR, dl, WideOpVT, SubVec, Vec); | |||
6520 | ||||
6521 | // Reduce to original width if needed. | |||
6522 | return DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, OpVT, SubVec, ZeroIdx); | |||
6523 | } | |||
6524 | ||||
6525 | static SDValue concatSubVectors(SDValue V1, SDValue V2, SelectionDAG &DAG, | |||
6526 | const SDLoc &dl) { | |||
6527 | assert(V1.getValueType() == V2.getValueType() && "subvector type mismatch")(static_cast <bool> (V1.getValueType() == V2.getValueType () && "subvector type mismatch") ? void (0) : __assert_fail ("V1.getValueType() == V2.getValueType() && \"subvector type mismatch\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6527, __extension__ __PRETTY_FUNCTION__)); | |||
6528 | EVT SubVT = V1.getValueType(); | |||
6529 | EVT SubSVT = SubVT.getScalarType(); | |||
6530 | unsigned SubNumElts = SubVT.getVectorNumElements(); | |||
6531 | unsigned SubVectorWidth = SubVT.getSizeInBits(); | |||
6532 | EVT VT = EVT::getVectorVT(*DAG.getContext(), SubSVT, 2 * SubNumElts); | |||
6533 | SDValue V = insertSubVector(DAG.getUNDEF(VT), V1, 0, DAG, dl, SubVectorWidth); | |||
6534 | return insertSubVector(V, V2, SubNumElts, DAG, dl, SubVectorWidth); | |||
6535 | } | |||
6536 | ||||
6537 | /// Returns a vector of specified type with all bits set. | |||
6538 | /// Always build ones vectors as <4 x i32>, <8 x i32> or <16 x i32>. | |||
6539 | /// Then bitcast to their original type, ensuring they get CSE'd. | |||
6540 | static SDValue getOnesVector(EVT VT, SelectionDAG &DAG, const SDLoc &dl) { | |||
6541 | assert((VT.is128BitVector() || VT.is256BitVector() || VT.is512BitVector()) &&(static_cast <bool> ((VT.is128BitVector() || VT.is256BitVector () || VT.is512BitVector()) && "Expected a 128/256/512-bit vector type" ) ? void (0) : __assert_fail ("(VT.is128BitVector() || VT.is256BitVector() || VT.is512BitVector()) && \"Expected a 128/256/512-bit vector type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6542, __extension__ __PRETTY_FUNCTION__)) | |||
6542 | "Expected a 128/256/512-bit vector type")(static_cast <bool> ((VT.is128BitVector() || VT.is256BitVector () || VT.is512BitVector()) && "Expected a 128/256/512-bit vector type" ) ? void (0) : __assert_fail ("(VT.is128BitVector() || VT.is256BitVector() || VT.is512BitVector()) && \"Expected a 128/256/512-bit vector type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6542, __extension__ __PRETTY_FUNCTION__)); | |||
6543 | ||||
6544 | APInt Ones = APInt::getAllOnesValue(32); | |||
6545 | unsigned NumElts = VT.getSizeInBits() / 32; | |||
6546 | SDValue Vec = DAG.getConstant(Ones, dl, MVT::getVectorVT(MVT::i32, NumElts)); | |||
6547 | return DAG.getBitcast(VT, Vec); | |||
6548 | } | |||
6549 | ||||
6550 | // Convert *_EXTEND_VECTOR_INREG to *_EXTEND opcode. | |||
6551 | static unsigned getOpcode_EXTEND(unsigned Opcode) { | |||
6552 | switch (Opcode) { | |||
6553 | case ISD::ANY_EXTEND: | |||
6554 | case ISD::ANY_EXTEND_VECTOR_INREG: | |||
6555 | return ISD::ANY_EXTEND; | |||
6556 | case ISD::ZERO_EXTEND: | |||
6557 | case ISD::ZERO_EXTEND_VECTOR_INREG: | |||
6558 | return ISD::ZERO_EXTEND; | |||
6559 | case ISD::SIGN_EXTEND: | |||
6560 | case ISD::SIGN_EXTEND_VECTOR_INREG: | |||
6561 | return ISD::SIGN_EXTEND; | |||
6562 | } | |||
6563 | llvm_unreachable("Unknown opcode")::llvm::llvm_unreachable_internal("Unknown opcode", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6563); | |||
6564 | } | |||
6565 | ||||
6566 | // Convert *_EXTEND to *_EXTEND_VECTOR_INREG opcode. | |||
6567 | static unsigned getOpcode_EXTEND_VECTOR_INREG(unsigned Opcode) { | |||
6568 | switch (Opcode) { | |||
6569 | case ISD::ANY_EXTEND: | |||
6570 | case ISD::ANY_EXTEND_VECTOR_INREG: | |||
6571 | return ISD::ANY_EXTEND_VECTOR_INREG; | |||
6572 | case ISD::ZERO_EXTEND: | |||
6573 | case ISD::ZERO_EXTEND_VECTOR_INREG: | |||
6574 | return ISD::ZERO_EXTEND_VECTOR_INREG; | |||
6575 | case ISD::SIGN_EXTEND: | |||
6576 | case ISD::SIGN_EXTEND_VECTOR_INREG: | |||
6577 | return ISD::SIGN_EXTEND_VECTOR_INREG; | |||
6578 | } | |||
6579 | llvm_unreachable("Unknown opcode")::llvm::llvm_unreachable_internal("Unknown opcode", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6579); | |||
6580 | } | |||
6581 | ||||
6582 | static SDValue getEXTEND_VECTOR_INREG(unsigned Opcode, const SDLoc &DL, EVT VT, | |||
6583 | SDValue In, SelectionDAG &DAG) { | |||
6584 | EVT InVT = In.getValueType(); | |||
6585 | assert(VT.isVector() && InVT.isVector() && "Expected vector VTs.")(static_cast <bool> (VT.isVector() && InVT.isVector () && "Expected vector VTs.") ? void (0) : __assert_fail ("VT.isVector() && InVT.isVector() && \"Expected vector VTs.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6585, __extension__ __PRETTY_FUNCTION__)); | |||
6586 | assert((ISD::ANY_EXTEND == Opcode || ISD::SIGN_EXTEND == Opcode ||(static_cast <bool> ((ISD::ANY_EXTEND == Opcode || ISD:: SIGN_EXTEND == Opcode || ISD::ZERO_EXTEND == Opcode) && "Unknown extension opcode") ? void (0) : __assert_fail ("(ISD::ANY_EXTEND == Opcode || ISD::SIGN_EXTEND == Opcode || ISD::ZERO_EXTEND == Opcode) && \"Unknown extension opcode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6588, __extension__ __PRETTY_FUNCTION__)) | |||
6587 | ISD::ZERO_EXTEND == Opcode) &&(static_cast <bool> ((ISD::ANY_EXTEND == Opcode || ISD:: SIGN_EXTEND == Opcode || ISD::ZERO_EXTEND == Opcode) && "Unknown extension opcode") ? void (0) : __assert_fail ("(ISD::ANY_EXTEND == Opcode || ISD::SIGN_EXTEND == Opcode || ISD::ZERO_EXTEND == Opcode) && \"Unknown extension opcode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6588, __extension__ __PRETTY_FUNCTION__)) | |||
6588 | "Unknown extension opcode")(static_cast <bool> ((ISD::ANY_EXTEND == Opcode || ISD:: SIGN_EXTEND == Opcode || ISD::ZERO_EXTEND == Opcode) && "Unknown extension opcode") ? void (0) : __assert_fail ("(ISD::ANY_EXTEND == Opcode || ISD::SIGN_EXTEND == Opcode || ISD::ZERO_EXTEND == Opcode) && \"Unknown extension opcode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6588, __extension__ __PRETTY_FUNCTION__)); | |||
6589 | ||||
6590 | // For 256-bit vectors, we only need the lower (128-bit) input half. | |||
6591 | // For 512-bit vectors, we only need the lower input half or quarter. | |||
6592 | if (InVT.getSizeInBits() > 128) { | |||
6593 | assert(VT.getSizeInBits() == InVT.getSizeInBits() &&(static_cast <bool> (VT.getSizeInBits() == InVT.getSizeInBits () && "Expected VTs to be the same size!") ? void (0) : __assert_fail ("VT.getSizeInBits() == InVT.getSizeInBits() && \"Expected VTs to be the same size!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6594, __extension__ __PRETTY_FUNCTION__)) | |||
6594 | "Expected VTs to be the same size!")(static_cast <bool> (VT.getSizeInBits() == InVT.getSizeInBits () && "Expected VTs to be the same size!") ? void (0) : __assert_fail ("VT.getSizeInBits() == InVT.getSizeInBits() && \"Expected VTs to be the same size!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6594, __extension__ __PRETTY_FUNCTION__)); | |||
6595 | unsigned Scale = VT.getScalarSizeInBits() / InVT.getScalarSizeInBits(); | |||
6596 | In = extractSubVector(In, 0, DAG, DL, | |||
6597 | std::max(128U, (unsigned)VT.getSizeInBits() / Scale)); | |||
6598 | InVT = In.getValueType(); | |||
6599 | } | |||
6600 | ||||
6601 | if (VT.getVectorNumElements() != InVT.getVectorNumElements()) | |||
6602 | Opcode = getOpcode_EXTEND_VECTOR_INREG(Opcode); | |||
6603 | ||||
6604 | return DAG.getNode(Opcode, DL, VT, In); | |||
6605 | } | |||
6606 | ||||
6607 | // Match (xor X, -1) -> X. | |||
6608 | // Match extract_subvector(xor X, -1) -> extract_subvector(X). | |||
6609 | // Match concat_vectors(xor X, -1, xor Y, -1) -> concat_vectors(X, Y). | |||
6610 | static SDValue IsNOT(SDValue V, SelectionDAG &DAG) { | |||
6611 | V = peekThroughBitcasts(V); | |||
6612 | if (V.getOpcode() == ISD::XOR && | |||
6613 | ISD::isBuildVectorAllOnes(V.getOperand(1).getNode())) | |||
6614 | return V.getOperand(0); | |||
6615 | if (V.getOpcode() == ISD::EXTRACT_SUBVECTOR && | |||
6616 | (isNullConstant(V.getOperand(1)) || V.getOperand(0).hasOneUse())) { | |||
6617 | if (SDValue Not = IsNOT(V.getOperand(0), DAG)) { | |||
6618 | Not = DAG.getBitcast(V.getOperand(0).getValueType(), Not); | |||
6619 | return DAG.getNode(ISD::EXTRACT_SUBVECTOR, SDLoc(Not), V.getValueType(), | |||
6620 | Not, V.getOperand(1)); | |||
6621 | } | |||
6622 | } | |||
6623 | SmallVector<SDValue, 2> CatOps; | |||
6624 | if (collectConcatOps(V.getNode(), CatOps)) { | |||
6625 | for (SDValue &CatOp : CatOps) { | |||
6626 | SDValue NotCat = IsNOT(CatOp, DAG); | |||
6627 | if (!NotCat) return SDValue(); | |||
6628 | CatOp = DAG.getBitcast(CatOp.getValueType(), NotCat); | |||
6629 | } | |||
6630 | return DAG.getNode(ISD::CONCAT_VECTORS, SDLoc(V), V.getValueType(), CatOps); | |||
6631 | } | |||
6632 | return SDValue(); | |||
6633 | } | |||
6634 | ||||
6635 | void llvm::createUnpackShuffleMask(EVT VT, SmallVectorImpl<int> &Mask, | |||
6636 | bool Lo, bool Unary) { | |||
6637 | assert(VT.getScalarType().isSimple() && (VT.getSizeInBits() % 128) == 0 &&(static_cast <bool> (VT.getScalarType().isSimple() && (VT.getSizeInBits() % 128) == 0 && "Illegal vector type to unpack" ) ? void (0) : __assert_fail ("VT.getScalarType().isSimple() && (VT.getSizeInBits() % 128) == 0 && \"Illegal vector type to unpack\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6638, __extension__ __PRETTY_FUNCTION__)) | |||
6638 | "Illegal vector type to unpack")(static_cast <bool> (VT.getScalarType().isSimple() && (VT.getSizeInBits() % 128) == 0 && "Illegal vector type to unpack" ) ? void (0) : __assert_fail ("VT.getScalarType().isSimple() && (VT.getSizeInBits() % 128) == 0 && \"Illegal vector type to unpack\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6638, __extension__ __PRETTY_FUNCTION__)); | |||
6639 | assert(Mask.empty() && "Expected an empty shuffle mask vector")(static_cast <bool> (Mask.empty() && "Expected an empty shuffle mask vector" ) ? void (0) : __assert_fail ("Mask.empty() && \"Expected an empty shuffle mask vector\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6639, __extension__ __PRETTY_FUNCTION__)); | |||
6640 | int NumElts = VT.getVectorNumElements(); | |||
6641 | int NumEltsInLane = 128 / VT.getScalarSizeInBits(); | |||
6642 | for (int i = 0; i < NumElts; ++i) { | |||
6643 | unsigned LaneStart = (i / NumEltsInLane) * NumEltsInLane; | |||
6644 | int Pos = (i % NumEltsInLane) / 2 + LaneStart; | |||
6645 | Pos += (Unary ? 0 : NumElts * (i % 2)); | |||
6646 | Pos += (Lo ? 0 : NumEltsInLane / 2); | |||
6647 | Mask.push_back(Pos); | |||
6648 | } | |||
6649 | } | |||
6650 | ||||
6651 | /// Similar to unpacklo/unpackhi, but without the 128-bit lane limitation | |||
6652 | /// imposed by AVX and specific to the unary pattern. Example: | |||
6653 | /// v8iX Lo --> <0, 0, 1, 1, 2, 2, 3, 3> | |||
6654 | /// v8iX Hi --> <4, 4, 5, 5, 6, 6, 7, 7> | |||
6655 | void llvm::createSplat2ShuffleMask(MVT VT, SmallVectorImpl<int> &Mask, | |||
6656 | bool Lo) { | |||
6657 | assert(Mask.empty() && "Expected an empty shuffle mask vector")(static_cast <bool> (Mask.empty() && "Expected an empty shuffle mask vector" ) ? void (0) : __assert_fail ("Mask.empty() && \"Expected an empty shuffle mask vector\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6657, __extension__ __PRETTY_FUNCTION__)); | |||
6658 | int NumElts = VT.getVectorNumElements(); | |||
6659 | for (int i = 0; i < NumElts; ++i) { | |||
6660 | int Pos = i / 2; | |||
6661 | Pos += (Lo ? 0 : NumElts / 2); | |||
6662 | Mask.push_back(Pos); | |||
6663 | } | |||
6664 | } | |||
6665 | ||||
6666 | /// Returns a vector_shuffle node for an unpackl operation. | |||
6667 | static SDValue getUnpackl(SelectionDAG &DAG, const SDLoc &dl, EVT VT, | |||
6668 | SDValue V1, SDValue V2) { | |||
6669 | SmallVector<int, 8> Mask; | |||
6670 | createUnpackShuffleMask(VT, Mask, /* Lo = */ true, /* Unary = */ false); | |||
6671 | return DAG.getVectorShuffle(VT, dl, V1, V2, Mask); | |||
6672 | } | |||
6673 | ||||
6674 | /// Returns a vector_shuffle node for an unpackh operation. | |||
6675 | static SDValue getUnpackh(SelectionDAG &DAG, const SDLoc &dl, EVT VT, | |||
6676 | SDValue V1, SDValue V2) { | |||
6677 | SmallVector<int, 8> Mask; | |||
6678 | createUnpackShuffleMask(VT, Mask, /* Lo = */ false, /* Unary = */ false); | |||
6679 | return DAG.getVectorShuffle(VT, dl, V1, V2, Mask); | |||
6680 | } | |||
6681 | ||||
6682 | /// Return a vector_shuffle of the specified vector of zero or undef vector. | |||
6683 | /// This produces a shuffle where the low element of V2 is swizzled into the | |||
6684 | /// zero/undef vector, landing at element Idx. | |||
6685 | /// This produces a shuffle mask like 4,1,2,3 (idx=0) or 0,1,2,4 (idx=3). | |||
6686 | static SDValue getShuffleVectorZeroOrUndef(SDValue V2, int Idx, | |||
6687 | bool IsZero, | |||
6688 | const X86Subtarget &Subtarget, | |||
6689 | SelectionDAG &DAG) { | |||
6690 | MVT VT = V2.getSimpleValueType(); | |||
6691 | SDValue V1 = IsZero | |||
6692 | ? getZeroVector(VT, Subtarget, DAG, SDLoc(V2)) : DAG.getUNDEF(VT); | |||
6693 | int NumElems = VT.getVectorNumElements(); | |||
6694 | SmallVector<int, 16> MaskVec(NumElems); | |||
6695 | for (int i = 0; i != NumElems; ++i) | |||
6696 | // If this is the insertion idx, put the low elt of V2 here. | |||
6697 | MaskVec[i] = (i == Idx) ? NumElems : i; | |||
6698 | return DAG.getVectorShuffle(VT, SDLoc(V2), V1, V2, MaskVec); | |||
6699 | } | |||
6700 | ||||
6701 | static const Constant *getTargetConstantFromBasePtr(SDValue Ptr) { | |||
6702 | if (Ptr.getOpcode() == X86ISD::Wrapper || | |||
6703 | Ptr.getOpcode() == X86ISD::WrapperRIP) | |||
6704 | Ptr = Ptr.getOperand(0); | |||
6705 | ||||
6706 | auto *CNode = dyn_cast<ConstantPoolSDNode>(Ptr); | |||
6707 | if (!CNode || CNode->isMachineConstantPoolEntry() || CNode->getOffset() != 0) | |||
6708 | return nullptr; | |||
6709 | ||||
6710 | return CNode->getConstVal(); | |||
6711 | } | |||
6712 | ||||
6713 | static const Constant *getTargetConstantFromNode(LoadSDNode *Load) { | |||
6714 | if (!Load || !ISD::isNormalLoad(Load)) | |||
6715 | return nullptr; | |||
6716 | return getTargetConstantFromBasePtr(Load->getBasePtr()); | |||
6717 | } | |||
6718 | ||||
6719 | static const Constant *getTargetConstantFromNode(SDValue Op) { | |||
6720 | Op = peekThroughBitcasts(Op); | |||
6721 | return getTargetConstantFromNode(dyn_cast<LoadSDNode>(Op)); | |||
6722 | } | |||
6723 | ||||
6724 | const Constant * | |||
6725 | X86TargetLowering::getTargetConstantFromLoad(LoadSDNode *LD) const { | |||
6726 | assert(LD && "Unexpected null LoadSDNode")(static_cast <bool> (LD && "Unexpected null LoadSDNode" ) ? void (0) : __assert_fail ("LD && \"Unexpected null LoadSDNode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6726, __extension__ __PRETTY_FUNCTION__)); | |||
6727 | return getTargetConstantFromNode(LD); | |||
6728 | } | |||
6729 | ||||
6730 | // Extract raw constant bits from constant pools. | |||
6731 | static bool getTargetConstantBitsFromNode(SDValue Op, unsigned EltSizeInBits, | |||
6732 | APInt &UndefElts, | |||
6733 | SmallVectorImpl<APInt> &EltBits, | |||
6734 | bool AllowWholeUndefs = true, | |||
6735 | bool AllowPartialUndefs = true) { | |||
6736 | assert(EltBits.empty() && "Expected an empty EltBits vector")(static_cast <bool> (EltBits.empty() && "Expected an empty EltBits vector" ) ? void (0) : __assert_fail ("EltBits.empty() && \"Expected an empty EltBits vector\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6736, __extension__ __PRETTY_FUNCTION__)); | |||
6737 | ||||
6738 | Op = peekThroughBitcasts(Op); | |||
6739 | ||||
6740 | EVT VT = Op.getValueType(); | |||
6741 | unsigned SizeInBits = VT.getSizeInBits(); | |||
6742 | assert((SizeInBits % EltSizeInBits) == 0 && "Can't split constant!")(static_cast <bool> ((SizeInBits % EltSizeInBits) == 0 && "Can't split constant!") ? void (0) : __assert_fail ("(SizeInBits % EltSizeInBits) == 0 && \"Can't split constant!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6742, __extension__ __PRETTY_FUNCTION__)); | |||
6743 | unsigned NumElts = SizeInBits / EltSizeInBits; | |||
6744 | ||||
6745 | // Bitcast a source array of element bits to the target size. | |||
6746 | auto CastBitData = [&](APInt &UndefSrcElts, ArrayRef<APInt> SrcEltBits) { | |||
6747 | unsigned NumSrcElts = UndefSrcElts.getBitWidth(); | |||
6748 | unsigned SrcEltSizeInBits = SrcEltBits[0].getBitWidth(); | |||
6749 | assert((NumSrcElts * SrcEltSizeInBits) == SizeInBits &&(static_cast <bool> ((NumSrcElts * SrcEltSizeInBits) == SizeInBits && "Constant bit sizes don't match") ? void (0) : __assert_fail ("(NumSrcElts * SrcEltSizeInBits) == SizeInBits && \"Constant bit sizes don't match\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6750, __extension__ __PRETTY_FUNCTION__)) | |||
6750 | "Constant bit sizes don't match")(static_cast <bool> ((NumSrcElts * SrcEltSizeInBits) == SizeInBits && "Constant bit sizes don't match") ? void (0) : __assert_fail ("(NumSrcElts * SrcEltSizeInBits) == SizeInBits && \"Constant bit sizes don't match\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 6750, __extension__ __PRETTY_FUNCTION__)); | |||
6751 | ||||
6752 | // Don't split if we don't allow undef bits. | |||
6753 | bool AllowUndefs = AllowWholeUndefs || AllowPartialUndefs; | |||
6754 | if (UndefSrcElts.getBoolValue() && !AllowUndefs) | |||
6755 | return false; | |||
6756 | ||||
6757 | // If we're already the right size, don't bother bitcasting. | |||
6758 | if (NumSrcElts == NumElts) { | |||
6759 | UndefElts = UndefSrcElts; | |||
6760 | EltBits.assign(SrcEltBits.begin(), SrcEltBits.end()); | |||
6761 | return true; | |||
6762 | } | |||
6763 | ||||
6764 | // Extract all the undef/constant element data and pack into single bitsets. | |||
6765 | APInt UndefBits(SizeInBits, 0); | |||
6766 | APInt MaskBits(SizeInBits, 0); | |||
6767 | ||||
6768 | for (unsigned i = 0; i != NumSrcElts; ++i) { | |||
6769 | unsigned BitOffset = i * SrcEltSizeInBits; | |||
6770 | if (UndefSrcElts[i]) | |||
6771 | UndefBits.setBits(BitOffset, BitOffset + SrcEltSizeInBits); | |||
6772 | MaskBits.insertBits(SrcEltBits[i], BitOffset); | |||
6773 | } | |||
6774 | ||||
6775 | // Split the undef/constant single bitset data into the target elements. | |||
6776 | UndefElts = APInt(NumElts, 0); | |||
6777 | EltBits.resize(NumElts, APInt(EltSizeInBits, 0)); | |||
6778 | ||||
6779 | for (unsigned i = 0; i != NumElts; ++i) { | |||
6780 | unsigned BitOffset = i * EltSizeInBits; | |||
6781 | APInt UndefEltBits = UndefBits.extractBits(EltSizeInBits, BitOffset); | |||
6782 | ||||
6783 | // Only treat an element as UNDEF if all bits are UNDEF. | |||
6784 | if (UndefEltBits.isAllOnesValue()) { | |||
6785 | if (!AllowWholeUndefs) | |||
6786 | return false; | |||
6787 | UndefElts.setBit(i); | |||
6788 | continue; | |||
6789 | } | |||
6790 | ||||
6791 | // If only some bits are UNDEF then treat them as zero (or bail if not | |||
6792 | // supported). | |||
6793 | if (UndefEltBits.getBoolValue() && !AllowPartialUndefs) | |||
6794 | return false; | |||
6795 | ||||
6796 | EltBits[i] = MaskBits.extractBits(EltSizeInBits, BitOffset); | |||
6797 | } | |||
6798 | return true; | |||
6799 | }; | |||
6800 | ||||
6801 | // Collect constant bits and insert into mask/undef bit masks. | |||
6802 | auto CollectConstantBits = [](const Constant *Cst, APInt &Mask, APInt &Undefs, | |||
6803 | unsigned UndefBitIndex) { | |||
6804 | if (!Cst) | |||
6805 | return false; | |||
6806 | if (isa<UndefValue>(Cst)) { | |||
6807 | Undefs.setBit(UndefBitIndex); | |||
6808 | return true; | |||
6809 | } | |||
6810 | if (auto *CInt = dyn_cast<ConstantInt>(Cst)) { | |||
6811 | Mask = CInt->getValue(); | |||
6812 | return true; | |||
6813 | } | |||
6814 | if (auto *CFP = dyn_cast<ConstantFP>(Cst)) { | |||
6815 | Mask = CFP->getValueAPF().bitcastToAPInt(); | |||
6816 | return true; | |||
6817 | } | |||
6818 | return false; | |||
6819 | }; | |||
6820 | ||||
6821 | // Handle UNDEFs. | |||
6822 | if (Op.isUndef()) { | |||
6823 | APInt UndefSrcElts = APInt::getAllOnesValue(NumElts); | |||
6824 | SmallVector<APInt, 64> SrcEltBits(NumElts, APInt(EltSizeInBits, 0)); | |||
6825 | return CastBitData(UndefSrcElts, SrcEltBits); | |||
6826 | } | |||
6827 | ||||
6828 | // Extract scalar constant bits. | |||
6829 | if (auto *Cst = dyn_cast<ConstantSDNode>(Op)) { | |||
6830 | APInt UndefSrcElts = APInt::getNullValue(1); | |||
6831 | SmallVector<APInt, 64> SrcEltBits(1, Cst->getAPIntValue()); | |||
6832 | return CastBitData(UndefSrcElts, SrcEltBits); | |||
6833 | } | |||
6834 | if (auto *Cst = dyn_cast<ConstantFPSDNode>(Op)) { | |||
6835 | APInt UndefSrcElts = APInt::getNullValue(1); | |||
6836 | APInt RawBits = Cst->getValueAPF().bitcastToAPInt(); | |||
6837 | SmallVector<APInt, 64> SrcEltBits(1, RawBits); | |||
6838 | return CastBitData(UndefSrcElts, SrcEltBits); | |||
6839 | } | |||
6840 | ||||
6841 | // Extract constant bits from build vector. | |||
6842 | if (ISD::isBuildVectorOfConstantSDNodes(Op.getNode())) { | |||
6843 | unsigned SrcEltSizeInBits = VT.getScalarSizeInBits(); | |||
6844 | unsigned NumSrcElts = SizeInBits / SrcEltSizeInBits; | |||
6845 | ||||
6846 | APInt UndefSrcElts(NumSrcElts, 0); | |||
6847 | SmallVector<APInt, 64> SrcEltBits(NumSrcElts, APInt(SrcEltSizeInBits, 0)); | |||
6848 | for (unsigned i = 0, e = Op.getNumOperands(); i != e; ++i) { | |||
6849 | const SDValue &Src = Op.getOperand(i); | |||
6850 | if (Src.isUndef()) { | |||
6851 | UndefSrcElts.setBit(i); | |||
6852 | continue; | |||
6853 | } | |||
6854 | auto *Cst = cast<ConstantSDNode>(Src); | |||
6855 | SrcEltBits[i] = Cst->getAPIntValue().zextOrTrunc(SrcEltSizeInBits); | |||
6856 | } | |||
6857 | return CastBitData(UndefSrcElts, SrcEltBits); | |||
6858 | } | |||
6859 | if (ISD::isBuildVectorOfConstantFPSDNodes(Op.getNode())) { | |||
6860 | unsigned SrcEltSizeInBits = VT.getScalarSizeInBits(); | |||
6861 | unsigned NumSrcElts = SizeInBits / SrcEltSizeInBits; | |||
6862 | ||||
6863 | APInt UndefSrcElts(NumSrcElts, 0); | |||
6864 | SmallVector<APInt, 64> SrcEltBits(NumSrcElts, APInt(SrcEltSizeInBits, 0)); | |||
6865 | for (unsigned i = 0, e = Op.getNumOperands(); i != e; ++i) { | |||
6866 | const SDValue &Src = Op.getOperand(i); | |||
6867 | if (Src.isUndef()) { | |||
6868 | UndefSrcElts.setBit(i); | |||
6869 | continue; | |||
6870 | } | |||
6871 | auto *Cst = cast<ConstantFPSDNode>(Src); | |||
6872 | APInt RawBits = Cst->getValueAPF().bitcastToAPInt(); | |||
6873 | SrcEltBits[i] = RawBits.zextOrTrunc(SrcEltSizeInBits); | |||
6874 | } | |||
6875 | return CastBitData(UndefSrcElts, SrcEltBits); | |||
6876 | } | |||
6877 | ||||
6878 | // Extract constant bits from constant pool vector. | |||
6879 | if (auto *Cst = getTargetConstantFromNode(Op)) { | |||
6880 | Type *CstTy = Cst->getType(); | |||
6881 | unsigned CstSizeInBits = CstTy->getPrimitiveSizeInBits(); | |||
6882 | if (!CstTy->isVectorTy() || (CstSizeInBits % SizeInBits) != 0) | |||
6883 | return false; | |||
6884 | ||||
6885 | unsigned SrcEltSizeInBits = CstTy->getScalarSizeInBits(); | |||
6886 | unsigned NumSrcElts = SizeInBits / SrcEltSizeInBits; | |||
6887 | ||||
6888 | APInt UndefSrcElts(NumSrcElts, 0); | |||
6889 | SmallVector<APInt, 64> SrcEltBits(NumSrcElts, APInt(SrcEltSizeInBits, 0)); | |||
6890 | for (unsigned i = 0; i != NumSrcElts; ++i) | |||
6891 | if (!CollectConstantBits(Cst->getAggregateElement(i), SrcEltBits[i], | |||
6892 | UndefSrcElts, i)) | |||
6893 | return false; | |||
6894 | ||||
6895 | return CastBitData(UndefSrcElts, SrcEltBits); | |||
6896 | } | |||
6897 | ||||
6898 | // Extract constant bits from a broadcasted constant pool scalar. | |||
6899 | if (Op.getOpcode() == X86ISD::VBROADCAST_LOAD && | |||
6900 | EltSizeInBits <= VT.getScalarSizeInBits()) { | |||
6901 | auto *MemIntr = cast<MemIntrinsicSDNode>(Op); | |||
6902 | if (MemIntr->getMemoryVT().getScalarSizeInBits() != VT.getScalarSizeInBits()) | |||
6903 | return false; | |||
6904 | ||||
6905 | SDValue Ptr = MemIntr->getBasePtr(); | |||
6906 | if (const Constant *C = getTargetConstantFromBasePtr(Ptr)) { | |||
6907 | unsigned SrcEltSizeInBits = C->getType()->getScalarSizeInBits(); | |||
6908 | unsigned NumSrcElts = SizeInBits / SrcEltSizeInBits; | |||
6909 | ||||
6910 | APInt UndefSrcElts(NumSrcElts, 0); | |||
6911 | SmallVector<APInt, 64> SrcEltBits(1, APInt(SrcEltSizeInBits, 0)); | |||
6912 | if (CollectConstantBits(C, SrcEltBits[0], UndefSrcElts, 0)) { | |||
6913 | if (UndefSrcElts[0]) | |||
6914 | UndefSrcElts.setBits(0, NumSrcElts); | |||
6915 | SrcEltBits.append(NumSrcElts - 1, SrcEltBits[0]); | |||
6916 | return CastBitData(UndefSrcElts, SrcEltBits); | |||
6917 | } | |||
6918 | } | |||
6919 | } | |||
6920 | ||||
6921 | // Extract constant bits from a subvector broadcast. | |||
6922 | if (Op.getOpcode() == X86ISD::SUBV_BROADCAST_LOAD) { | |||
6923 | auto *MemIntr = cast<MemIntrinsicSDNode>(Op); | |||
6924 | SDValue Ptr = MemIntr->getBasePtr(); | |||
6925 | // The source constant may be larger than the subvector broadcast, | |||
6926 | // ensure we extract the correct subvector constants. | |||
6927 | if (const Constant *Cst = getTargetConstantFromBasePtr(Ptr)) { | |||
6928 | Type *CstTy = Cst->getType(); | |||
6929 | unsigned CstSizeInBits = CstTy->getPrimitiveSizeInBits(); | |||
6930 | unsigned SubVecSizeInBits = MemIntr->getMemoryVT().getStoreSizeInBits(); | |||
6931 | if (!CstTy->isVectorTy() || (CstSizeInBits % SubVecSizeInBits) != 0 || | |||
6932 | (SizeInBits % SubVecSizeInBits) != 0) | |||
6933 | return false; | |||
6934 | unsigned CstEltSizeInBits = CstTy->getScalarSizeInBits(); | |||
6935 | unsigned NumSubElts = SubVecSizeInBits / CstEltSizeInBits; | |||
6936 | unsigned NumSubVecs = SizeInBits / SubVecSizeInBits; | |||
6937 | APInt UndefSubElts(NumSubElts, 0); | |||
6938 | SmallVector<APInt, 64> SubEltBits(NumSubElts * NumSubVecs, | |||
6939 | APInt(CstEltSizeInBits, 0)); | |||
6940 | for (unsigned i = 0; i != NumSubElts; ++i) { | |||
6941 | if (!CollectConstantBits(Cst->getAggregateElement(i), SubEltBits[i], | |||
6942 | UndefSubElts, i)) | |||
6943 | return false; | |||
6944 | for (unsigned j = 1; j != NumSubVecs; ++j) | |||
6945 | SubEltBits[i + (j * NumSubElts)] = SubEltBits[i]; | |||
6946 | } | |||
6947 | UndefSubElts = APInt::getSplat(NumSubVecs * UndefSubElts.getBitWidth(), | |||
6948 | UndefSubElts); | |||
6949 | return CastBitData(UndefSubElts, SubEltBits); | |||
6950 | } | |||
6951 | } | |||
6952 | ||||
6953 | // Extract a rematerialized scalar constant insertion. | |||
6954 | if (Op.getOpcode() == X86ISD::VZEXT_MOVL && | |||
6955 | Op.getOperand(0).getOpcode() == ISD::SCALAR_TO_VECTOR && | |||
6956 | isa<ConstantSDNode>(Op.getOperand(0).getOperand(0))) { | |||
6957 | unsigned SrcEltSizeInBits = VT.getScalarSizeInBits(); | |||
6958 | unsigned NumSrcElts = SizeInBits / SrcEltSizeInBits; | |||
6959 | ||||
6960 | APInt UndefSrcElts(NumSrcElts, 0); | |||
6961 | SmallVector<APInt, 64> SrcEltBits; | |||
6962 | auto *CN = cast<ConstantSDNode>(Op.getOperand(0).getOperand(0)); | |||
6963 | SrcEltBits.push_back(CN->getAPIntValue().zextOrTrunc(SrcEltSizeInBits)); | |||
6964 | SrcEltBits.append(NumSrcElts - 1, APInt(SrcEltSizeInBits, 0)); | |||
6965 | return CastBitData(UndefSrcElts, SrcEltBits); | |||
6966 | } | |||
6967 | ||||
6968 | // Insert constant bits from a base and sub vector sources. | |||
6969 | if (Op.getOpcode() == ISD::INSERT_SUBVECTOR) { | |||
6970 | // If bitcasts to larger elements we might lose track of undefs - don't | |||
6971 | // allow any to be safe. | |||
6972 | unsigned SrcEltSizeInBits = VT.getScalarSizeInBits(); | |||
6973 | bool AllowUndefs = EltSizeInBits >= SrcEltSizeInBits; | |||
6974 | ||||
6975 | APInt UndefSrcElts, UndefSubElts; | |||
6976 | SmallVector<APInt, 32> EltSrcBits, EltSubBits; | |||
6977 | if (getTargetConstantBitsFromNode(Op.getOperand(1), SrcEltSizeInBits, | |||
6978 | UndefSubElts, EltSubBits, | |||
6979 | AllowWholeUndefs && AllowUndefs, | |||
6980 | AllowPartialUndefs && AllowUndefs) && | |||
6981 | getTargetConstantBitsFromNode(Op.getOperand(0), SrcEltSizeInBits, | |||
6982 | UndefSrcElts, EltSrcBits, | |||
6983 | AllowWholeUndefs && AllowUndefs, | |||
6984 | AllowPartialUndefs && AllowUndefs)) { | |||
6985 | unsigned BaseIdx = Op.getConstantOperandVal(2); | |||
6986 | UndefSrcElts.insertBits(UndefSubElts, BaseIdx); | |||
6987 | for (unsigned i = 0, e = EltSubBits.size(); i != e; ++i) | |||
6988 | EltSrcBits[BaseIdx + i] = EltSubBits[i]; | |||
6989 | return CastBitData(UndefSrcElts, EltSrcBits); | |||
6990 | } | |||
6991 | } | |||
6992 | ||||
6993 | // Extract constant bits from a subvector's source. | |||
6994 | if (Op.getOpcode() == ISD::EXTRACT_SUBVECTOR) { | |||
6995 | // TODO - support extract_subvector through bitcasts. | |||
6996 | if (EltSizeInBits != VT.getScalarSizeInBits()) | |||
6997 | return false; | |||
6998 | ||||
6999 | if (getTargetConstantBitsFromNode(Op.getOperand(0), EltSizeInBits, | |||
7000 | UndefElts, EltBits, AllowWholeUndefs, | |||
7001 | AllowPartialUndefs)) { | |||
7002 | EVT SrcVT = Op.getOperand(0).getValueType(); | |||
7003 | unsigned NumSrcElts = SrcVT.getVectorNumElements(); | |||
7004 | unsigned NumSubElts = VT.getVectorNumElements(); | |||
7005 | unsigned BaseIdx = Op.getConstantOperandVal(1); | |||
7006 | UndefElts = UndefElts.extractBits(NumSubElts, BaseIdx); | |||
7007 | if ((BaseIdx + NumSubElts) != NumSrcElts) | |||
7008 | EltBits.erase(EltBits.begin() + BaseIdx + NumSubElts, EltBits.end()); | |||
7009 | if (BaseIdx != 0) | |||
7010 | EltBits.erase(EltBits.begin(), EltBits.begin() + BaseIdx); | |||
7011 | return true; | |||
7012 | } | |||
7013 | } | |||
7014 | ||||
7015 | // Extract constant bits from shuffle node sources. | |||
7016 | if (auto *SVN = dyn_cast<ShuffleVectorSDNode>(Op)) { | |||
7017 | // TODO - support shuffle through bitcasts. | |||
7018 | if (EltSizeInBits != VT.getScalarSizeInBits()) | |||
7019 | return false; | |||
7020 | ||||
7021 | ArrayRef<int> Mask = SVN->getMask(); | |||
7022 | if ((!AllowWholeUndefs || !AllowPartialUndefs) && | |||
7023 | llvm::any_of(Mask, [](int M) { return M < 0; })) | |||
7024 | return false; | |||
7025 | ||||
7026 | APInt UndefElts0, UndefElts1; | |||
7027 | SmallVector<APInt, 32> EltBits0, EltBits1; | |||
7028 | if (isAnyInRange(Mask, 0, NumElts) && | |||
7029 | !getTargetConstantBitsFromNode(Op.getOperand(0), EltSizeInBits, | |||
7030 | UndefElts0, EltBits0, AllowWholeUndefs, | |||
7031 | AllowPartialUndefs)) | |||
7032 | return false; | |||
7033 | if (isAnyInRange(Mask, NumElts, 2 * NumElts) && | |||
7034 | !getTargetConstantBitsFromNode(Op.getOperand(1), EltSizeInBits, | |||
7035 | UndefElts1, EltBits1, AllowWholeUndefs, | |||
7036 | AllowPartialUndefs)) | |||
7037 | return false; | |||
7038 | ||||
7039 | UndefElts = APInt::getNullValue(NumElts); | |||
7040 | for (int i = 0; i != (int)NumElts; ++i) { | |||
7041 | int M = Mask[i]; | |||
7042 | if (M < 0) { | |||
7043 | UndefElts.setBit(i); | |||
7044 | EltBits.push_back(APInt::getNullValue(EltSizeInBits)); | |||
7045 | } else if (M < (int)NumElts) { | |||
7046 | if (UndefElts0[M]) | |||
7047 | UndefElts.setBit(i); | |||
7048 | EltBits.push_back(EltBits0[M]); | |||
7049 | } else { | |||
7050 | if (UndefElts1[M - NumElts]) | |||
7051 | UndefElts.setBit(i); | |||
7052 | EltBits.push_back(EltBits1[M - NumElts]); | |||
7053 | } | |||
7054 | } | |||
7055 | return true; | |||
7056 | } | |||
7057 | ||||
7058 | return false; | |||
7059 | } | |||
7060 | ||||
7061 | namespace llvm { | |||
7062 | namespace X86 { | |||
7063 | bool isConstantSplat(SDValue Op, APInt &SplatVal, bool AllowPartialUndefs) { | |||
7064 | APInt UndefElts; | |||
7065 | SmallVector<APInt, 16> EltBits; | |||
7066 | if (getTargetConstantBitsFromNode(Op, Op.getScalarValueSizeInBits(), | |||
7067 | UndefElts, EltBits, true, | |||
7068 | AllowPartialUndefs)) { | |||
7069 | int SplatIndex = -1; | |||
7070 | for (int i = 0, e = EltBits.size(); i != e; ++i) { | |||
7071 | if (UndefElts[i]) | |||
7072 | continue; | |||
7073 | if (0 <= SplatIndex && EltBits[i] != EltBits[SplatIndex]) { | |||
7074 | SplatIndex = -1; | |||
7075 | break; | |||
7076 | } | |||
7077 | SplatIndex = i; | |||
7078 | } | |||
7079 | if (0 <= SplatIndex) { | |||
7080 | SplatVal = EltBits[SplatIndex]; | |||
7081 | return true; | |||
7082 | } | |||
7083 | } | |||
7084 | ||||
7085 | return false; | |||
7086 | } | |||
7087 | } // namespace X86 | |||
7088 | } // namespace llvm | |||
7089 | ||||
7090 | static bool getTargetShuffleMaskIndices(SDValue MaskNode, | |||
7091 | unsigned MaskEltSizeInBits, | |||
7092 | SmallVectorImpl<uint64_t> &RawMask, | |||
7093 | APInt &UndefElts) { | |||
7094 | // Extract the raw target constant bits. | |||
7095 | SmallVector<APInt, 64> EltBits; | |||
7096 | if (!getTargetConstantBitsFromNode(MaskNode, MaskEltSizeInBits, UndefElts, | |||
7097 | EltBits, /* AllowWholeUndefs */ true, | |||
7098 | /* AllowPartialUndefs */ false)) | |||
7099 | return false; | |||
7100 | ||||
7101 | // Insert the extracted elements into the mask. | |||
7102 | for (const APInt &Elt : EltBits) | |||
7103 | RawMask.push_back(Elt.getZExtValue()); | |||
7104 | ||||
7105 | return true; | |||
7106 | } | |||
7107 | ||||
7108 | /// Create a shuffle mask that matches the PACKSS/PACKUS truncation. | |||
7109 | /// A multi-stage pack shuffle mask is created by specifying NumStages > 1. | |||
7110 | /// Note: This ignores saturation, so inputs must be checked first. | |||
7111 | static void createPackShuffleMask(MVT VT, SmallVectorImpl<int> &Mask, | |||
7112 | bool Unary, unsigned NumStages = 1) { | |||
7113 | assert(Mask.empty() && "Expected an empty shuffle mask vector")(static_cast <bool> (Mask.empty() && "Expected an empty shuffle mask vector" ) ? void (0) : __assert_fail ("Mask.empty() && \"Expected an empty shuffle mask vector\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7113, __extension__ __PRETTY_FUNCTION__)); | |||
7114 | unsigned NumElts = VT.getVectorNumElements(); | |||
7115 | unsigned NumLanes = VT.getSizeInBits() / 128; | |||
7116 | unsigned NumEltsPerLane = 128 / VT.getScalarSizeInBits(); | |||
7117 | unsigned Offset = Unary ? 0 : NumElts; | |||
7118 | unsigned Repetitions = 1u << (NumStages - 1); | |||
7119 | unsigned Increment = 1u << NumStages; | |||
7120 | assert((NumEltsPerLane >> NumStages) > 0 && "Illegal packing compaction")(static_cast <bool> ((NumEltsPerLane >> NumStages ) > 0 && "Illegal packing compaction") ? void (0) : __assert_fail ("(NumEltsPerLane >> NumStages) > 0 && \"Illegal packing compaction\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7120, __extension__ __PRETTY_FUNCTION__)); | |||
7121 | ||||
7122 | for (unsigned Lane = 0; Lane != NumLanes; ++Lane) { | |||
7123 | for (unsigned Stage = 0; Stage != Repetitions; ++Stage) { | |||
7124 | for (unsigned Elt = 0; Elt != NumEltsPerLane; Elt += Increment) | |||
7125 | Mask.push_back(Elt + (Lane * NumEltsPerLane)); | |||
7126 | for (unsigned Elt = 0; Elt != NumEltsPerLane; Elt += Increment) | |||
7127 | Mask.push_back(Elt + (Lane * NumEltsPerLane) + Offset); | |||
7128 | } | |||
7129 | } | |||
7130 | } | |||
7131 | ||||
7132 | // Split the demanded elts of a PACKSS/PACKUS node between its operands. | |||
7133 | static void getPackDemandedElts(EVT VT, const APInt &DemandedElts, | |||
7134 | APInt &DemandedLHS, APInt &DemandedRHS) { | |||
7135 | int NumLanes = VT.getSizeInBits() / 128; | |||
7136 | int NumElts = DemandedElts.getBitWidth(); | |||
7137 | int NumInnerElts = NumElts / 2; | |||
7138 | int NumEltsPerLane = NumElts / NumLanes; | |||
7139 | int NumInnerEltsPerLane = NumInnerElts / NumLanes; | |||
7140 | ||||
7141 | DemandedLHS = APInt::getNullValue(NumInnerElts); | |||
7142 | DemandedRHS = APInt::getNullValue(NumInnerElts); | |||
7143 | ||||
7144 | // Map DemandedElts to the packed operands. | |||
7145 | for (int Lane = 0; Lane != NumLanes; ++Lane) { | |||
7146 | for (int Elt = 0; Elt != NumInnerEltsPerLane; ++Elt) { | |||
7147 | int OuterIdx = (Lane * NumEltsPerLane) + Elt; | |||
7148 | int InnerIdx = (Lane * NumInnerEltsPerLane) + Elt; | |||
7149 | if (DemandedElts[OuterIdx]) | |||
7150 | DemandedLHS.setBit(InnerIdx); | |||
7151 | if (DemandedElts[OuterIdx + NumInnerEltsPerLane]) | |||
7152 | DemandedRHS.setBit(InnerIdx); | |||
7153 | } | |||
7154 | } | |||
7155 | } | |||
7156 | ||||
7157 | // Split the demanded elts of a HADD/HSUB node between its operands. | |||
7158 | static void getHorizDemandedElts(EVT VT, const APInt &DemandedElts, | |||
7159 | APInt &DemandedLHS, APInt &DemandedRHS) { | |||
7160 | int NumLanes = VT.getSizeInBits() / 128; | |||
7161 | int NumElts = DemandedElts.getBitWidth(); | |||
7162 | int NumEltsPerLane = NumElts / NumLanes; | |||
7163 | int HalfEltsPerLane = NumEltsPerLane / 2; | |||
7164 | ||||
7165 | DemandedLHS = APInt::getNullValue(NumElts); | |||
7166 | DemandedRHS = APInt::getNullValue(NumElts); | |||
7167 | ||||
7168 | // Map DemandedElts to the horizontal operands. | |||
7169 | for (int Idx = 0; Idx != NumElts; ++Idx) { | |||
7170 | if (!DemandedElts[Idx]) | |||
7171 | continue; | |||
7172 | int LaneIdx = (Idx / NumEltsPerLane) * NumEltsPerLane; | |||
7173 | int LocalIdx = Idx % NumEltsPerLane; | |||
7174 | if (LocalIdx < HalfEltsPerLane) { | |||
7175 | DemandedLHS.setBit(LaneIdx + 2 * LocalIdx + 0); | |||
7176 | DemandedLHS.setBit(LaneIdx + 2 * LocalIdx + 1); | |||
7177 | } else { | |||
7178 | LocalIdx -= HalfEltsPerLane; | |||
7179 | DemandedRHS.setBit(LaneIdx + 2 * LocalIdx + 0); | |||
7180 | DemandedRHS.setBit(LaneIdx + 2 * LocalIdx + 1); | |||
7181 | } | |||
7182 | } | |||
7183 | } | |||
7184 | ||||
7185 | /// Calculates the shuffle mask corresponding to the target-specific opcode. | |||
7186 | /// If the mask could be calculated, returns it in \p Mask, returns the shuffle | |||
7187 | /// operands in \p Ops, and returns true. | |||
7188 | /// Sets \p IsUnary to true if only one source is used. Note that this will set | |||
7189 | /// IsUnary for shuffles which use a single input multiple times, and in those | |||
7190 | /// cases it will adjust the mask to only have indices within that single input. | |||
7191 | /// It is an error to call this with non-empty Mask/Ops vectors. | |||
7192 | static bool getTargetShuffleMask(SDNode *N, MVT VT, bool AllowSentinelZero, | |||
7193 | SmallVectorImpl<SDValue> &Ops, | |||
7194 | SmallVectorImpl<int> &Mask, bool &IsUnary) { | |||
7195 | unsigned NumElems = VT.getVectorNumElements(); | |||
7196 | unsigned MaskEltSize = VT.getScalarSizeInBits(); | |||
7197 | SmallVector<uint64_t, 32> RawMask; | |||
7198 | APInt RawUndefs; | |||
7199 | uint64_t ImmN; | |||
7200 | ||||
7201 | assert(Mask.empty() && "getTargetShuffleMask expects an empty Mask vector")(static_cast <bool> (Mask.empty() && "getTargetShuffleMask expects an empty Mask vector" ) ? void (0) : __assert_fail ("Mask.empty() && \"getTargetShuffleMask expects an empty Mask vector\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7201, __extension__ __PRETTY_FUNCTION__)); | |||
7202 | assert(Ops.empty() && "getTargetShuffleMask expects an empty Ops vector")(static_cast <bool> (Ops.empty() && "getTargetShuffleMask expects an empty Ops vector" ) ? void (0) : __assert_fail ("Ops.empty() && \"getTargetShuffleMask expects an empty Ops vector\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7202, __extension__ __PRETTY_FUNCTION__)); | |||
7203 | ||||
7204 | IsUnary = false; | |||
7205 | bool IsFakeUnary = false; | |||
7206 | switch (N->getOpcode()) { | |||
7207 | case X86ISD::BLENDI: | |||
7208 | assert(N->getOperand(0).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(0).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(0).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7208, __extension__ __PRETTY_FUNCTION__)); | |||
7209 | assert(N->getOperand(1).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(1).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(1).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7209, __extension__ __PRETTY_FUNCTION__)); | |||
7210 | ImmN = N->getConstantOperandVal(N->getNumOperands() - 1); | |||
7211 | DecodeBLENDMask(NumElems, ImmN, Mask); | |||
7212 | IsUnary = IsFakeUnary = N->getOperand(0) == N->getOperand(1); | |||
7213 | break; | |||
7214 | case X86ISD::SHUFP: | |||
7215 | assert(N->getOperand(0).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(0).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(0).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7215, __extension__ __PRETTY_FUNCTION__)); | |||
7216 | assert(N->getOperand(1).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(1).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(1).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7216, __extension__ __PRETTY_FUNCTION__)); | |||
7217 | ImmN = N->getConstantOperandVal(N->getNumOperands() - 1); | |||
7218 | DecodeSHUFPMask(NumElems, MaskEltSize, ImmN, Mask); | |||
7219 | IsUnary = IsFakeUnary = N->getOperand(0) == N->getOperand(1); | |||
7220 | break; | |||
7221 | case X86ISD::INSERTPS: | |||
7222 | assert(N->getOperand(0).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(0).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(0).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7222, __extension__ __PRETTY_FUNCTION__)); | |||
7223 | assert(N->getOperand(1).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(1).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(1).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7223, __extension__ __PRETTY_FUNCTION__)); | |||
7224 | ImmN = N->getConstantOperandVal(N->getNumOperands() - 1); | |||
7225 | DecodeINSERTPSMask(ImmN, Mask); | |||
7226 | IsUnary = IsFakeUnary = N->getOperand(0) == N->getOperand(1); | |||
7227 | break; | |||
7228 | case X86ISD::EXTRQI: | |||
7229 | assert(N->getOperand(0).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(0).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(0).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7229, __extension__ __PRETTY_FUNCTION__)); | |||
7230 | if (isa<ConstantSDNode>(N->getOperand(1)) && | |||
7231 | isa<ConstantSDNode>(N->getOperand(2))) { | |||
7232 | int BitLen = N->getConstantOperandVal(1); | |||
7233 | int BitIdx = N->getConstantOperandVal(2); | |||
7234 | DecodeEXTRQIMask(NumElems, MaskEltSize, BitLen, BitIdx, Mask); | |||
7235 | IsUnary = true; | |||
7236 | } | |||
7237 | break; | |||
7238 | case X86ISD::INSERTQI: | |||
7239 | assert(N->getOperand(0).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(0).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(0).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7239, __extension__ __PRETTY_FUNCTION__)); | |||
7240 | assert(N->getOperand(1).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(1).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(1).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7240, __extension__ __PRETTY_FUNCTION__)); | |||
7241 | if (isa<ConstantSDNode>(N->getOperand(2)) && | |||
7242 | isa<ConstantSDNode>(N->getOperand(3))) { | |||
7243 | int BitLen = N->getConstantOperandVal(2); | |||
7244 | int BitIdx = N->getConstantOperandVal(3); | |||
7245 | DecodeINSERTQIMask(NumElems, MaskEltSize, BitLen, BitIdx, Mask); | |||
7246 | IsUnary = IsFakeUnary = N->getOperand(0) == N->getOperand(1); | |||
7247 | } | |||
7248 | break; | |||
7249 | case X86ISD::UNPCKH: | |||
7250 | assert(N->getOperand(0).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(0).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(0).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7250, __extension__ __PRETTY_FUNCTION__)); | |||
7251 | assert(N->getOperand(1).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(1).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(1).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7251, __extension__ __PRETTY_FUNCTION__)); | |||
7252 | DecodeUNPCKHMask(NumElems, MaskEltSize, Mask); | |||
7253 | IsUnary = IsFakeUnary = N->getOperand(0) == N->getOperand(1); | |||
7254 | break; | |||
7255 | case X86ISD::UNPCKL: | |||
7256 | assert(N->getOperand(0).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(0).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(0).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7256, __extension__ __PRETTY_FUNCTION__)); | |||
7257 | assert(N->getOperand(1).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(1).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(1).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7257, __extension__ __PRETTY_FUNCTION__)); | |||
7258 | DecodeUNPCKLMask(NumElems, MaskEltSize, Mask); | |||
7259 | IsUnary = IsFakeUnary = N->getOperand(0) == N->getOperand(1); | |||
7260 | break; | |||
7261 | case X86ISD::MOVHLPS: | |||
7262 | assert(N->getOperand(0).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(0).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(0).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7262, __extension__ __PRETTY_FUNCTION__)); | |||
7263 | assert(N->getOperand(1).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(1).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(1).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7263, __extension__ __PRETTY_FUNCTION__)); | |||
7264 | DecodeMOVHLPSMask(NumElems, Mask); | |||
7265 | IsUnary = IsFakeUnary = N->getOperand(0) == N->getOperand(1); | |||
7266 | break; | |||
7267 | case X86ISD::MOVLHPS: | |||
7268 | assert(N->getOperand(0).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(0).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(0).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7268, __extension__ __PRETTY_FUNCTION__)); | |||
7269 | assert(N->getOperand(1).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(1).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(1).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7269, __extension__ __PRETTY_FUNCTION__)); | |||
7270 | DecodeMOVLHPSMask(NumElems, Mask); | |||
7271 | IsUnary = IsFakeUnary = N->getOperand(0) == N->getOperand(1); | |||
7272 | break; | |||
7273 | case X86ISD::VALIGN: | |||
7274 | assert((VT.getScalarType() == MVT::i32 || VT.getScalarType() == MVT::i64) &&(static_cast <bool> ((VT.getScalarType() == MVT::i32 || VT.getScalarType() == MVT::i64) && "Only 32-bit and 64-bit elements are supported!" ) ? void (0) : __assert_fail ("(VT.getScalarType() == MVT::i32 || VT.getScalarType() == MVT::i64) && \"Only 32-bit and 64-bit elements are supported!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7275, __extension__ __PRETTY_FUNCTION__)) | |||
7275 | "Only 32-bit and 64-bit elements are supported!")(static_cast <bool> ((VT.getScalarType() == MVT::i32 || VT.getScalarType() == MVT::i64) && "Only 32-bit and 64-bit elements are supported!" ) ? void (0) : __assert_fail ("(VT.getScalarType() == MVT::i32 || VT.getScalarType() == MVT::i64) && \"Only 32-bit and 64-bit elements are supported!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7275, __extension__ __PRETTY_FUNCTION__)); | |||
7276 | assert(N->getOperand(0).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(0).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(0).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7276, __extension__ __PRETTY_FUNCTION__)); | |||
7277 | assert(N->getOperand(1).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(1).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(1).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7277, __extension__ __PRETTY_FUNCTION__)); | |||
7278 | ImmN = N->getConstantOperandVal(N->getNumOperands() - 1); | |||
7279 | DecodeVALIGNMask(NumElems, ImmN, Mask); | |||
7280 | IsUnary = IsFakeUnary = N->getOperand(0) == N->getOperand(1); | |||
7281 | Ops.push_back(N->getOperand(1)); | |||
7282 | Ops.push_back(N->getOperand(0)); | |||
7283 | break; | |||
7284 | case X86ISD::PALIGNR: | |||
7285 | assert(VT.getScalarType() == MVT::i8 && "Byte vector expected")(static_cast <bool> (VT.getScalarType() == MVT::i8 && "Byte vector expected") ? void (0) : __assert_fail ("VT.getScalarType() == MVT::i8 && \"Byte vector expected\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7285, __extension__ __PRETTY_FUNCTION__)); | |||
7286 | assert(N->getOperand(0).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(0).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(0).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7286, __extension__ __PRETTY_FUNCTION__)); | |||
7287 | assert(N->getOperand(1).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(1).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(1).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7287, __extension__ __PRETTY_FUNCTION__)); | |||
7288 | ImmN = N->getConstantOperandVal(N->getNumOperands() - 1); | |||
7289 | DecodePALIGNRMask(NumElems, ImmN, Mask); | |||
7290 | IsUnary = IsFakeUnary = N->getOperand(0) == N->getOperand(1); | |||
7291 | Ops.push_back(N->getOperand(1)); | |||
7292 | Ops.push_back(N->getOperand(0)); | |||
7293 | break; | |||
7294 | case X86ISD::VSHLDQ: | |||
7295 | assert(VT.getScalarType() == MVT::i8 && "Byte vector expected")(static_cast <bool> (VT.getScalarType() == MVT::i8 && "Byte vector expected") ? void (0) : __assert_fail ("VT.getScalarType() == MVT::i8 && \"Byte vector expected\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7295, __extension__ __PRETTY_FUNCTION__)); | |||
7296 | assert(N->getOperand(0).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(0).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(0).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7296, __extension__ __PRETTY_FUNCTION__)); | |||
7297 | ImmN = N->getConstantOperandVal(N->getNumOperands() - 1); | |||
7298 | DecodePSLLDQMask(NumElems, ImmN, Mask); | |||
7299 | IsUnary = true; | |||
7300 | break; | |||
7301 | case X86ISD::VSRLDQ: | |||
7302 | assert(VT.getScalarType() == MVT::i8 && "Byte vector expected")(static_cast <bool> (VT.getScalarType() == MVT::i8 && "Byte vector expected") ? void (0) : __assert_fail ("VT.getScalarType() == MVT::i8 && \"Byte vector expected\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7302, __extension__ __PRETTY_FUNCTION__)); | |||
7303 | assert(N->getOperand(0).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(0).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(0).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7303, __extension__ __PRETTY_FUNCTION__)); | |||
7304 | ImmN = N->getConstantOperandVal(N->getNumOperands() - 1); | |||
7305 | DecodePSRLDQMask(NumElems, ImmN, Mask); | |||
7306 | IsUnary = true; | |||
7307 | break; | |||
7308 | case X86ISD::PSHUFD: | |||
7309 | case X86ISD::VPERMILPI: | |||
7310 | assert(N->getOperand(0).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(0).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(0).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7310, __extension__ __PRETTY_FUNCTION__)); | |||
7311 | ImmN = N->getConstantOperandVal(N->getNumOperands() - 1); | |||
7312 | DecodePSHUFMask(NumElems, MaskEltSize, ImmN, Mask); | |||
7313 | IsUnary = true; | |||
7314 | break; | |||
7315 | case X86ISD::PSHUFHW: | |||
7316 | assert(N->getOperand(0).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(0).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(0).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7316, __extension__ __PRETTY_FUNCTION__)); | |||
7317 | ImmN = N->getConstantOperandVal(N->getNumOperands() - 1); | |||
7318 | DecodePSHUFHWMask(NumElems, ImmN, Mask); | |||
7319 | IsUnary = true; | |||
7320 | break; | |||
7321 | case X86ISD::PSHUFLW: | |||
7322 | assert(N->getOperand(0).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(0).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(0).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7322, __extension__ __PRETTY_FUNCTION__)); | |||
7323 | ImmN = N->getConstantOperandVal(N->getNumOperands() - 1); | |||
7324 | DecodePSHUFLWMask(NumElems, ImmN, Mask); | |||
7325 | IsUnary = true; | |||
7326 | break; | |||
7327 | case X86ISD::VZEXT_MOVL: | |||
7328 | assert(N->getOperand(0).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(0).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(0).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7328, __extension__ __PRETTY_FUNCTION__)); | |||
7329 | DecodeZeroMoveLowMask(NumElems, Mask); | |||
7330 | IsUnary = true; | |||
7331 | break; | |||
7332 | case X86ISD::VBROADCAST: | |||
7333 | // We only decode broadcasts of same-sized vectors, peeking through to | |||
7334 | // extracted subvectors is likely to cause hasOneUse issues with | |||
7335 | // SimplifyDemandedBits etc. | |||
7336 | if (N->getOperand(0).getValueType() == VT) { | |||
7337 | DecodeVectorBroadcast(NumElems, Mask); | |||
7338 | IsUnary = true; | |||
7339 | break; | |||
7340 | } | |||
7341 | return false; | |||
7342 | case X86ISD::VPERMILPV: { | |||
7343 | assert(N->getOperand(0).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(0).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(0).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7343, __extension__ __PRETTY_FUNCTION__)); | |||
7344 | IsUnary = true; | |||
7345 | SDValue MaskNode = N->getOperand(1); | |||
7346 | if (getTargetShuffleMaskIndices(MaskNode, MaskEltSize, RawMask, | |||
7347 | RawUndefs)) { | |||
7348 | DecodeVPERMILPMask(NumElems, MaskEltSize, RawMask, RawUndefs, Mask); | |||
7349 | break; | |||
7350 | } | |||
7351 | return false; | |||
7352 | } | |||
7353 | case X86ISD::PSHUFB: { | |||
7354 | assert(VT.getScalarType() == MVT::i8 && "Byte vector expected")(static_cast <bool> (VT.getScalarType() == MVT::i8 && "Byte vector expected") ? void (0) : __assert_fail ("VT.getScalarType() == MVT::i8 && \"Byte vector expected\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7354, __extension__ __PRETTY_FUNCTION__)); | |||
7355 | assert(N->getOperand(0).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(0).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(0).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7355, __extension__ __PRETTY_FUNCTION__)); | |||
7356 | assert(N->getOperand(1).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(1).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(1).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7356, __extension__ __PRETTY_FUNCTION__)); | |||
7357 | IsUnary = true; | |||
7358 | SDValue MaskNode = N->getOperand(1); | |||
7359 | if (getTargetShuffleMaskIndices(MaskNode, 8, RawMask, RawUndefs)) { | |||
7360 | DecodePSHUFBMask(RawMask, RawUndefs, Mask); | |||
7361 | break; | |||
7362 | } | |||
7363 | return false; | |||
7364 | } | |||
7365 | case X86ISD::VPERMI: | |||
7366 | assert(N->getOperand(0).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(0).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(0).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7366, __extension__ __PRETTY_FUNCTION__)); | |||
7367 | ImmN = N->getConstantOperandVal(N->getNumOperands() - 1); | |||
7368 | DecodeVPERMMask(NumElems, ImmN, Mask); | |||
7369 | IsUnary = true; | |||
7370 | break; | |||
7371 | case X86ISD::MOVSS: | |||
7372 | case X86ISD::MOVSD: | |||
7373 | case X86ISD::MOVSH: | |||
7374 | assert(N->getOperand(0).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(0).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(0).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7374, __extension__ __PRETTY_FUNCTION__)); | |||
7375 | assert(N->getOperand(1).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(1).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(1).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7375, __extension__ __PRETTY_FUNCTION__)); | |||
7376 | DecodeScalarMoveMask(NumElems, /* IsLoad */ false, Mask); | |||
7377 | break; | |||
7378 | case X86ISD::VPERM2X128: | |||
7379 | assert(N->getOperand(0).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(0).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(0).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7379, __extension__ __PRETTY_FUNCTION__)); | |||
7380 | assert(N->getOperand(1).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(1).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(1).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7380, __extension__ __PRETTY_FUNCTION__)); | |||
7381 | ImmN = N->getConstantOperandVal(N->getNumOperands() - 1); | |||
7382 | DecodeVPERM2X128Mask(NumElems, ImmN, Mask); | |||
7383 | IsUnary = IsFakeUnary = N->getOperand(0) == N->getOperand(1); | |||
7384 | break; | |||
7385 | case X86ISD::SHUF128: | |||
7386 | assert(N->getOperand(0).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(0).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(0).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7386, __extension__ __PRETTY_FUNCTION__)); | |||
7387 | assert(N->getOperand(1).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(1).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(1).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7387, __extension__ __PRETTY_FUNCTION__)); | |||
7388 | ImmN = N->getConstantOperandVal(N->getNumOperands() - 1); | |||
7389 | decodeVSHUF64x2FamilyMask(NumElems, MaskEltSize, ImmN, Mask); | |||
7390 | IsUnary = IsFakeUnary = N->getOperand(0) == N->getOperand(1); | |||
7391 | break; | |||
7392 | case X86ISD::MOVSLDUP: | |||
7393 | assert(N->getOperand(0).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(0).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(0).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7393, __extension__ __PRETTY_FUNCTION__)); | |||
7394 | DecodeMOVSLDUPMask(NumElems, Mask); | |||
7395 | IsUnary = true; | |||
7396 | break; | |||
7397 | case X86ISD::MOVSHDUP: | |||
7398 | assert(N->getOperand(0).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(0).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(0).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7398, __extension__ __PRETTY_FUNCTION__)); | |||
7399 | DecodeMOVSHDUPMask(NumElems, Mask); | |||
7400 | IsUnary = true; | |||
7401 | break; | |||
7402 | case X86ISD::MOVDDUP: | |||
7403 | assert(N->getOperand(0).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(0).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(0).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7403, __extension__ __PRETTY_FUNCTION__)); | |||
7404 | DecodeMOVDDUPMask(NumElems, Mask); | |||
7405 | IsUnary = true; | |||
7406 | break; | |||
7407 | case X86ISD::VPERMIL2: { | |||
7408 | assert(N->getOperand(0).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(0).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(0).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7408, __extension__ __PRETTY_FUNCTION__)); | |||
7409 | assert(N->getOperand(1).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(1).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(1).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7409, __extension__ __PRETTY_FUNCTION__)); | |||
7410 | IsUnary = IsFakeUnary = N->getOperand(0) == N->getOperand(1); | |||
7411 | SDValue MaskNode = N->getOperand(2); | |||
7412 | SDValue CtrlNode = N->getOperand(3); | |||
7413 | if (ConstantSDNode *CtrlOp = dyn_cast<ConstantSDNode>(CtrlNode)) { | |||
7414 | unsigned CtrlImm = CtrlOp->getZExtValue(); | |||
7415 | if (getTargetShuffleMaskIndices(MaskNode, MaskEltSize, RawMask, | |||
7416 | RawUndefs)) { | |||
7417 | DecodeVPERMIL2PMask(NumElems, MaskEltSize, CtrlImm, RawMask, RawUndefs, | |||
7418 | Mask); | |||
7419 | break; | |||
7420 | } | |||
7421 | } | |||
7422 | return false; | |||
7423 | } | |||
7424 | case X86ISD::VPPERM: { | |||
7425 | assert(N->getOperand(0).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(0).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(0).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7425, __extension__ __PRETTY_FUNCTION__)); | |||
7426 | assert(N->getOperand(1).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(1).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(1).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7426, __extension__ __PRETTY_FUNCTION__)); | |||
7427 | IsUnary = IsFakeUnary = N->getOperand(0) == N->getOperand(1); | |||
7428 | SDValue MaskNode = N->getOperand(2); | |||
7429 | if (getTargetShuffleMaskIndices(MaskNode, 8, RawMask, RawUndefs)) { | |||
7430 | DecodeVPPERMMask(RawMask, RawUndefs, Mask); | |||
7431 | break; | |||
7432 | } | |||
7433 | return false; | |||
7434 | } | |||
7435 | case X86ISD::VPERMV: { | |||
7436 | assert(N->getOperand(1).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(1).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(1).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7436, __extension__ __PRETTY_FUNCTION__)); | |||
7437 | IsUnary = true; | |||
7438 | // Unlike most shuffle nodes, VPERMV's mask operand is operand 0. | |||
7439 | Ops.push_back(N->getOperand(1)); | |||
7440 | SDValue MaskNode = N->getOperand(0); | |||
7441 | if (getTargetShuffleMaskIndices(MaskNode, MaskEltSize, RawMask, | |||
7442 | RawUndefs)) { | |||
7443 | DecodeVPERMVMask(RawMask, RawUndefs, Mask); | |||
7444 | break; | |||
7445 | } | |||
7446 | return false; | |||
7447 | } | |||
7448 | case X86ISD::VPERMV3: { | |||
7449 | assert(N->getOperand(0).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(0).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(0).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7449, __extension__ __PRETTY_FUNCTION__)); | |||
7450 | assert(N->getOperand(2).getValueType() == VT && "Unexpected value type")(static_cast <bool> (N->getOperand(2).getValueType() == VT && "Unexpected value type") ? void (0) : __assert_fail ("N->getOperand(2).getValueType() == VT && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7450, __extension__ __PRETTY_FUNCTION__)); | |||
7451 | IsUnary = IsFakeUnary = N->getOperand(0) == N->getOperand(2); | |||
7452 | // Unlike most shuffle nodes, VPERMV3's mask operand is the middle one. | |||
7453 | Ops.push_back(N->getOperand(0)); | |||
7454 | Ops.push_back(N->getOperand(2)); | |||
7455 | SDValue MaskNode = N->getOperand(1); | |||
7456 | if (getTargetShuffleMaskIndices(MaskNode, MaskEltSize, RawMask, | |||
7457 | RawUndefs)) { | |||
7458 | DecodeVPERMV3Mask(RawMask, RawUndefs, Mask); | |||
7459 | break; | |||
7460 | } | |||
7461 | return false; | |||
7462 | } | |||
7463 | default: llvm_unreachable("unknown target shuffle node")::llvm::llvm_unreachable_internal("unknown target shuffle node" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7463); | |||
7464 | } | |||
7465 | ||||
7466 | // Empty mask indicates the decode failed. | |||
7467 | if (Mask.empty()) | |||
7468 | return false; | |||
7469 | ||||
7470 | // Check if we're getting a shuffle mask with zero'd elements. | |||
7471 | if (!AllowSentinelZero && isAnyZero(Mask)) | |||
7472 | return false; | |||
7473 | ||||
7474 | // If we have a fake unary shuffle, the shuffle mask is spread across two | |||
7475 | // inputs that are actually the same node. Re-map the mask to always point | |||
7476 | // into the first input. | |||
7477 | if (IsFakeUnary) | |||
7478 | for (int &M : Mask) | |||
7479 | if (M >= (int)Mask.size()) | |||
7480 | M -= Mask.size(); | |||
7481 | ||||
7482 | // If we didn't already add operands in the opcode-specific code, default to | |||
7483 | // adding 1 or 2 operands starting at 0. | |||
7484 | if (Ops.empty()) { | |||
7485 | Ops.push_back(N->getOperand(0)); | |||
7486 | if (!IsUnary || IsFakeUnary) | |||
7487 | Ops.push_back(N->getOperand(1)); | |||
7488 | } | |||
7489 | ||||
7490 | return true; | |||
7491 | } | |||
7492 | ||||
7493 | // Wrapper for getTargetShuffleMask with InUnary; | |||
7494 | static bool getTargetShuffleMask(SDNode *N, MVT VT, bool AllowSentinelZero, | |||
7495 | SmallVectorImpl<SDValue> &Ops, | |||
7496 | SmallVectorImpl<int> &Mask) { | |||
7497 | bool IsUnary; | |||
7498 | return getTargetShuffleMask(N, VT, AllowSentinelZero, Ops, Mask, IsUnary); | |||
7499 | } | |||
7500 | ||||
7501 | /// Compute whether each element of a shuffle is zeroable. | |||
7502 | /// | |||
7503 | /// A "zeroable" vector shuffle element is one which can be lowered to zero. | |||
7504 | /// Either it is an undef element in the shuffle mask, the element of the input | |||
7505 | /// referenced is undef, or the element of the input referenced is known to be | |||
7506 | /// zero. Many x86 shuffles can zero lanes cheaply and we often want to handle | |||
7507 | /// as many lanes with this technique as possible to simplify the remaining | |||
7508 | /// shuffle. | |||
7509 | static void computeZeroableShuffleElements(ArrayRef<int> Mask, | |||
7510 | SDValue V1, SDValue V2, | |||
7511 | APInt &KnownUndef, APInt &KnownZero) { | |||
7512 | int Size = Mask.size(); | |||
7513 | KnownUndef = KnownZero = APInt::getNullValue(Size); | |||
7514 | ||||
7515 | V1 = peekThroughBitcasts(V1); | |||
7516 | V2 = peekThroughBitcasts(V2); | |||
7517 | ||||
7518 | bool V1IsZero = ISD::isBuildVectorAllZeros(V1.getNode()); | |||
7519 | bool V2IsZero = ISD::isBuildVectorAllZeros(V2.getNode()); | |||
7520 | ||||
7521 | int VectorSizeInBits = V1.getValueSizeInBits(); | |||
7522 | int ScalarSizeInBits = VectorSizeInBits / Size; | |||
7523 | assert(!(VectorSizeInBits % ScalarSizeInBits) && "Illegal shuffle mask size")(static_cast <bool> (!(VectorSizeInBits % ScalarSizeInBits ) && "Illegal shuffle mask size") ? void (0) : __assert_fail ("!(VectorSizeInBits % ScalarSizeInBits) && \"Illegal shuffle mask size\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7523, __extension__ __PRETTY_FUNCTION__)); | |||
7524 | ||||
7525 | for (int i = 0; i < Size; ++i) { | |||
7526 | int M = Mask[i]; | |||
7527 | // Handle the easy cases. | |||
7528 | if (M < 0) { | |||
7529 | KnownUndef.setBit(i); | |||
7530 | continue; | |||
7531 | } | |||
7532 | if ((M >= 0 && M < Size && V1IsZero) || (M >= Size && V2IsZero)) { | |||
7533 | KnownZero.setBit(i); | |||
7534 | continue; | |||
7535 | } | |||
7536 | ||||
7537 | // Determine shuffle input and normalize the mask. | |||
7538 | SDValue V = M < Size ? V1 : V2; | |||
7539 | M %= Size; | |||
7540 | ||||
7541 | // Currently we can only search BUILD_VECTOR for UNDEF/ZERO elements. | |||
7542 | if (V.getOpcode() != ISD::BUILD_VECTOR) | |||
7543 | continue; | |||
7544 | ||||
7545 | // If the BUILD_VECTOR has fewer elements then the bitcasted portion of | |||
7546 | // the (larger) source element must be UNDEF/ZERO. | |||
7547 | if ((Size % V.getNumOperands()) == 0) { | |||
7548 | int Scale = Size / V->getNumOperands(); | |||
7549 | SDValue Op = V.getOperand(M / Scale); | |||
7550 | if (Op.isUndef()) | |||
7551 | KnownUndef.setBit(i); | |||
7552 | if (X86::isZeroNode(Op)) | |||
7553 | KnownZero.setBit(i); | |||
7554 | else if (ConstantSDNode *Cst = dyn_cast<ConstantSDNode>(Op)) { | |||
7555 | APInt Val = Cst->getAPIntValue(); | |||
7556 | Val = Val.extractBits(ScalarSizeInBits, (M % Scale) * ScalarSizeInBits); | |||
7557 | if (Val == 0) | |||
7558 | KnownZero.setBit(i); | |||
7559 | } else if (ConstantFPSDNode *Cst = dyn_cast<ConstantFPSDNode>(Op)) { | |||
7560 | APInt Val = Cst->getValueAPF().bitcastToAPInt(); | |||
7561 | Val = Val.extractBits(ScalarSizeInBits, (M % Scale) * ScalarSizeInBits); | |||
7562 | if (Val == 0) | |||
7563 | KnownZero.setBit(i); | |||
7564 | } | |||
7565 | continue; | |||
7566 | } | |||
7567 | ||||
7568 | // If the BUILD_VECTOR has more elements then all the (smaller) source | |||
7569 | // elements must be UNDEF or ZERO. | |||
7570 | if ((V.getNumOperands() % Size) == 0) { | |||
7571 | int Scale = V->getNumOperands() / Size; | |||
7572 | bool AllUndef = true; | |||
7573 | bool AllZero = true; | |||
7574 | for (int j = 0; j < Scale; ++j) { | |||
7575 | SDValue Op = V.getOperand((M * Scale) + j); | |||
7576 | AllUndef &= Op.isUndef(); | |||
7577 | AllZero &= X86::isZeroNode(Op); | |||
7578 | } | |||
7579 | if (AllUndef) | |||
7580 | KnownUndef.setBit(i); | |||
7581 | if (AllZero) | |||
7582 | KnownZero.setBit(i); | |||
7583 | continue; | |||
7584 | } | |||
7585 | } | |||
7586 | } | |||
7587 | ||||
7588 | /// Decode a target shuffle mask and inputs and see if any values are | |||
7589 | /// known to be undef or zero from their inputs. | |||
7590 | /// Returns true if the target shuffle mask was decoded. | |||
7591 | /// FIXME: Merge this with computeZeroableShuffleElements? | |||
7592 | static bool getTargetShuffleAndZeroables(SDValue N, SmallVectorImpl<int> &Mask, | |||
7593 | SmallVectorImpl<SDValue> &Ops, | |||
7594 | APInt &KnownUndef, APInt &KnownZero) { | |||
7595 | bool IsUnary; | |||
7596 | if (!isTargetShuffle(N.getOpcode())) | |||
7597 | return false; | |||
7598 | ||||
7599 | MVT VT = N.getSimpleValueType(); | |||
7600 | if (!getTargetShuffleMask(N.getNode(), VT, true, Ops, Mask, IsUnary)) | |||
7601 | return false; | |||
7602 | ||||
7603 | int Size = Mask.size(); | |||
7604 | SDValue V1 = Ops[0]; | |||
7605 | SDValue V2 = IsUnary ? V1 : Ops[1]; | |||
7606 | KnownUndef = KnownZero = APInt::getNullValue(Size); | |||
7607 | ||||
7608 | V1 = peekThroughBitcasts(V1); | |||
7609 | V2 = peekThroughBitcasts(V2); | |||
7610 | ||||
7611 | assert((VT.getSizeInBits() % Size) == 0 &&(static_cast <bool> ((VT.getSizeInBits() % Size) == 0 && "Illegal split of shuffle value type") ? void (0) : __assert_fail ("(VT.getSizeInBits() % Size) == 0 && \"Illegal split of shuffle value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7612, __extension__ __PRETTY_FUNCTION__)) | |||
7612 | "Illegal split of shuffle value type")(static_cast <bool> ((VT.getSizeInBits() % Size) == 0 && "Illegal split of shuffle value type") ? void (0) : __assert_fail ("(VT.getSizeInBits() % Size) == 0 && \"Illegal split of shuffle value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7612, __extension__ __PRETTY_FUNCTION__)); | |||
7613 | unsigned EltSizeInBits = VT.getSizeInBits() / Size; | |||
7614 | ||||
7615 | // Extract known constant input data. | |||
7616 | APInt UndefSrcElts[2]; | |||
7617 | SmallVector<APInt, 32> SrcEltBits[2]; | |||
7618 | bool IsSrcConstant[2] = { | |||
7619 | getTargetConstantBitsFromNode(V1, EltSizeInBits, UndefSrcElts[0], | |||
7620 | SrcEltBits[0], true, false), | |||
7621 | getTargetConstantBitsFromNode(V2, EltSizeInBits, UndefSrcElts[1], | |||
7622 | SrcEltBits[1], true, false)}; | |||
7623 | ||||
7624 | for (int i = 0; i < Size; ++i) { | |||
7625 | int M = Mask[i]; | |||
7626 | ||||
7627 | // Already decoded as SM_SentinelZero / SM_SentinelUndef. | |||
7628 | if (M < 0) { | |||
7629 | assert(isUndefOrZero(M) && "Unknown shuffle sentinel value!")(static_cast <bool> (isUndefOrZero(M) && "Unknown shuffle sentinel value!" ) ? void (0) : __assert_fail ("isUndefOrZero(M) && \"Unknown shuffle sentinel value!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7629, __extension__ __PRETTY_FUNCTION__)); | |||
7630 | if (SM_SentinelUndef == M) | |||
7631 | KnownUndef.setBit(i); | |||
7632 | if (SM_SentinelZero == M) | |||
7633 | KnownZero.setBit(i); | |||
7634 | continue; | |||
7635 | } | |||
7636 | ||||
7637 | // Determine shuffle input and normalize the mask. | |||
7638 | unsigned SrcIdx = M / Size; | |||
7639 | SDValue V = M < Size ? V1 : V2; | |||
7640 | M %= Size; | |||
7641 | ||||
7642 | // We are referencing an UNDEF input. | |||
7643 | if (V.isUndef()) { | |||
7644 | KnownUndef.setBit(i); | |||
7645 | continue; | |||
7646 | } | |||
7647 | ||||
7648 | // SCALAR_TO_VECTOR - only the first element is defined, and the rest UNDEF. | |||
7649 | // TODO: We currently only set UNDEF for integer types - floats use the same | |||
7650 | // registers as vectors and many of the scalar folded loads rely on the | |||
7651 | // SCALAR_TO_VECTOR pattern. | |||
7652 | if (V.getOpcode() == ISD::SCALAR_TO_VECTOR && | |||
7653 | (Size % V.getValueType().getVectorNumElements()) == 0) { | |||
7654 | int Scale = Size / V.getValueType().getVectorNumElements(); | |||
7655 | int Idx = M / Scale; | |||
7656 | if (Idx != 0 && !VT.isFloatingPoint()) | |||
7657 | KnownUndef.setBit(i); | |||
7658 | else if (Idx == 0 && X86::isZeroNode(V.getOperand(0))) | |||
7659 | KnownZero.setBit(i); | |||
7660 | continue; | |||
7661 | } | |||
7662 | ||||
7663 | // INSERT_SUBVECTOR - to widen vectors we often insert them into UNDEF | |||
7664 | // base vectors. | |||
7665 | if (V.getOpcode() == ISD::INSERT_SUBVECTOR) { | |||
7666 | SDValue Vec = V.getOperand(0); | |||
7667 | int NumVecElts = Vec.getValueType().getVectorNumElements(); | |||
7668 | if (Vec.isUndef() && Size == NumVecElts) { | |||
7669 | int Idx = V.getConstantOperandVal(2); | |||
7670 | int NumSubElts = V.getOperand(1).getValueType().getVectorNumElements(); | |||
7671 | if (M < Idx || (Idx + NumSubElts) <= M) | |||
7672 | KnownUndef.setBit(i); | |||
7673 | } | |||
7674 | continue; | |||
7675 | } | |||
7676 | ||||
7677 | // Attempt to extract from the source's constant bits. | |||
7678 | if (IsSrcConstant[SrcIdx]) { | |||
7679 | if (UndefSrcElts[SrcIdx][M]) | |||
7680 | KnownUndef.setBit(i); | |||
7681 | else if (SrcEltBits[SrcIdx][M] == 0) | |||
7682 | KnownZero.setBit(i); | |||
7683 | } | |||
7684 | } | |||
7685 | ||||
7686 | assert(VT.getVectorNumElements() == (unsigned)Size &&(static_cast <bool> (VT.getVectorNumElements() == (unsigned )Size && "Different mask size from vector size!") ? void (0) : __assert_fail ("VT.getVectorNumElements() == (unsigned)Size && \"Different mask size from vector size!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7687, __extension__ __PRETTY_FUNCTION__)) | |||
7687 | "Different mask size from vector size!")(static_cast <bool> (VT.getVectorNumElements() == (unsigned )Size && "Different mask size from vector size!") ? void (0) : __assert_fail ("VT.getVectorNumElements() == (unsigned)Size && \"Different mask size from vector size!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7687, __extension__ __PRETTY_FUNCTION__)); | |||
7688 | return true; | |||
7689 | } | |||
7690 | ||||
7691 | // Replace target shuffle mask elements with known undef/zero sentinels. | |||
7692 | static void resolveTargetShuffleFromZeroables(SmallVectorImpl<int> &Mask, | |||
7693 | const APInt &KnownUndef, | |||
7694 | const APInt &KnownZero, | |||
7695 | bool ResolveKnownZeros= true) { | |||
7696 | unsigned NumElts = Mask.size(); | |||
7697 | assert(KnownUndef.getBitWidth() == NumElts &&(static_cast <bool> (KnownUndef.getBitWidth() == NumElts && KnownZero.getBitWidth() == NumElts && "Shuffle mask size mismatch" ) ? void (0) : __assert_fail ("KnownUndef.getBitWidth() == NumElts && KnownZero.getBitWidth() == NumElts && \"Shuffle mask size mismatch\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7698, __extension__ __PRETTY_FUNCTION__)) | |||
7698 | KnownZero.getBitWidth() == NumElts && "Shuffle mask size mismatch")(static_cast <bool> (KnownUndef.getBitWidth() == NumElts && KnownZero.getBitWidth() == NumElts && "Shuffle mask size mismatch" ) ? void (0) : __assert_fail ("KnownUndef.getBitWidth() == NumElts && KnownZero.getBitWidth() == NumElts && \"Shuffle mask size mismatch\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7698, __extension__ __PRETTY_FUNCTION__)); | |||
7699 | ||||
7700 | for (unsigned i = 0; i != NumElts; ++i) { | |||
7701 | if (KnownUndef[i]) | |||
7702 | Mask[i] = SM_SentinelUndef; | |||
7703 | else if (ResolveKnownZeros && KnownZero[i]) | |||
7704 | Mask[i] = SM_SentinelZero; | |||
7705 | } | |||
7706 | } | |||
7707 | ||||
7708 | // Extract target shuffle mask sentinel elements to known undef/zero bitmasks. | |||
7709 | static void resolveZeroablesFromTargetShuffle(const SmallVectorImpl<int> &Mask, | |||
7710 | APInt &KnownUndef, | |||
7711 | APInt &KnownZero) { | |||
7712 | unsigned NumElts = Mask.size(); | |||
7713 | KnownUndef = KnownZero = APInt::getNullValue(NumElts); | |||
7714 | ||||
7715 | for (unsigned i = 0; i != NumElts; ++i) { | |||
7716 | int M = Mask[i]; | |||
7717 | if (SM_SentinelUndef == M) | |||
7718 | KnownUndef.setBit(i); | |||
7719 | if (SM_SentinelZero == M) | |||
7720 | KnownZero.setBit(i); | |||
7721 | } | |||
7722 | } | |||
7723 | ||||
7724 | // Forward declaration (for getFauxShuffleMask recursive check). | |||
7725 | // TODO: Use DemandedElts variant. | |||
7726 | static bool getTargetShuffleInputs(SDValue Op, SmallVectorImpl<SDValue> &Inputs, | |||
7727 | SmallVectorImpl<int> &Mask, | |||
7728 | const SelectionDAG &DAG, unsigned Depth, | |||
7729 | bool ResolveKnownElts); | |||
7730 | ||||
7731 | // Attempt to decode ops that could be represented as a shuffle mask. | |||
7732 | // The decoded shuffle mask may contain a different number of elements to the | |||
7733 | // destination value type. | |||
7734 | static bool getFauxShuffleMask(SDValue N, const APInt &DemandedElts, | |||
7735 | SmallVectorImpl<int> &Mask, | |||
7736 | SmallVectorImpl<SDValue> &Ops, | |||
7737 | const SelectionDAG &DAG, unsigned Depth, | |||
7738 | bool ResolveKnownElts) { | |||
7739 | Mask.clear(); | |||
7740 | Ops.clear(); | |||
7741 | ||||
7742 | MVT VT = N.getSimpleValueType(); | |||
7743 | unsigned NumElts = VT.getVectorNumElements(); | |||
7744 | unsigned NumSizeInBits = VT.getSizeInBits(); | |||
7745 | unsigned NumBitsPerElt = VT.getScalarSizeInBits(); | |||
7746 | if ((NumBitsPerElt % 8) != 0 || (NumSizeInBits % 8) != 0) | |||
7747 | return false; | |||
7748 | assert(NumElts == DemandedElts.getBitWidth() && "Unexpected vector size")(static_cast <bool> (NumElts == DemandedElts.getBitWidth () && "Unexpected vector size") ? void (0) : __assert_fail ("NumElts == DemandedElts.getBitWidth() && \"Unexpected vector size\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7748, __extension__ __PRETTY_FUNCTION__)); | |||
7749 | unsigned NumSizeInBytes = NumSizeInBits / 8; | |||
7750 | unsigned NumBytesPerElt = NumBitsPerElt / 8; | |||
7751 | ||||
7752 | unsigned Opcode = N.getOpcode(); | |||
7753 | switch (Opcode) { | |||
7754 | case ISD::VECTOR_SHUFFLE: { | |||
7755 | // Don't treat ISD::VECTOR_SHUFFLE as a target shuffle so decode it here. | |||
7756 | ArrayRef<int> ShuffleMask = cast<ShuffleVectorSDNode>(N)->getMask(); | |||
7757 | if (isUndefOrInRange(ShuffleMask, 0, 2 * NumElts)) { | |||
7758 | Mask.append(ShuffleMask.begin(), ShuffleMask.end()); | |||
7759 | Ops.push_back(N.getOperand(0)); | |||
7760 | Ops.push_back(N.getOperand(1)); | |||
7761 | return true; | |||
7762 | } | |||
7763 | return false; | |||
7764 | } | |||
7765 | case ISD::AND: | |||
7766 | case X86ISD::ANDNP: { | |||
7767 | // Attempt to decode as a per-byte mask. | |||
7768 | APInt UndefElts; | |||
7769 | SmallVector<APInt, 32> EltBits; | |||
7770 | SDValue N0 = N.getOperand(0); | |||
7771 | SDValue N1 = N.getOperand(1); | |||
7772 | bool IsAndN = (X86ISD::ANDNP == Opcode); | |||
7773 | uint64_t ZeroMask = IsAndN ? 255 : 0; | |||
7774 | if (!getTargetConstantBitsFromNode(IsAndN ? N0 : N1, 8, UndefElts, EltBits)) | |||
7775 | return false; | |||
7776 | for (int i = 0, e = (int)EltBits.size(); i != e; ++i) { | |||
7777 | if (UndefElts[i]) { | |||
7778 | Mask.push_back(SM_SentinelUndef); | |||
7779 | continue; | |||
7780 | } | |||
7781 | const APInt &ByteBits = EltBits[i]; | |||
7782 | if (ByteBits != 0 && ByteBits != 255) | |||
7783 | return false; | |||
7784 | Mask.push_back(ByteBits == ZeroMask ? SM_SentinelZero : i); | |||
7785 | } | |||
7786 | Ops.push_back(IsAndN ? N1 : N0); | |||
7787 | return true; | |||
7788 | } | |||
7789 | case ISD::OR: { | |||
7790 | // Handle OR(SHUFFLE,SHUFFLE) case where one source is zero and the other | |||
7791 | // is a valid shuffle index. | |||
7792 | SDValue N0 = peekThroughBitcasts(N.getOperand(0)); | |||
7793 | SDValue N1 = peekThroughBitcasts(N.getOperand(1)); | |||
7794 | if (!N0.getValueType().isVector() || !N1.getValueType().isVector()) | |||
7795 | return false; | |||
7796 | SmallVector<int, 64> SrcMask0, SrcMask1; | |||
7797 | SmallVector<SDValue, 2> SrcInputs0, SrcInputs1; | |||
7798 | if (!getTargetShuffleInputs(N0, SrcInputs0, SrcMask0, DAG, Depth + 1, | |||
7799 | true) || | |||
7800 | !getTargetShuffleInputs(N1, SrcInputs1, SrcMask1, DAG, Depth + 1, | |||
7801 | true)) | |||
7802 | return false; | |||
7803 | ||||
7804 | size_t MaskSize = std::max(SrcMask0.size(), SrcMask1.size()); | |||
7805 | SmallVector<int, 64> Mask0, Mask1; | |||
7806 | narrowShuffleMaskElts(MaskSize / SrcMask0.size(), SrcMask0, Mask0); | |||
7807 | narrowShuffleMaskElts(MaskSize / SrcMask1.size(), SrcMask1, Mask1); | |||
7808 | for (int i = 0; i != (int)MaskSize; ++i) { | |||
7809 | // NOTE: Don't handle SM_SentinelUndef, as we can end up in infinite | |||
7810 | // loops converting between OR and BLEND shuffles due to | |||
7811 | // canWidenShuffleElements merging away undef elements, meaning we | |||
7812 | // fail to recognise the OR as the undef element isn't known zero. | |||
7813 | if (Mask0[i] == SM_SentinelZero && Mask1[i] == SM_SentinelZero) | |||
7814 | Mask.push_back(SM_SentinelZero); | |||
7815 | else if (Mask1[i] == SM_SentinelZero) | |||
7816 | Mask.push_back(i); | |||
7817 | else if (Mask0[i] == SM_SentinelZero) | |||
7818 | Mask.push_back(i + MaskSize); | |||
7819 | else | |||
7820 | return false; | |||
7821 | } | |||
7822 | Ops.push_back(N0); | |||
7823 | Ops.push_back(N1); | |||
7824 | return true; | |||
7825 | } | |||
7826 | case ISD::INSERT_SUBVECTOR: { | |||
7827 | SDValue Src = N.getOperand(0); | |||
7828 | SDValue Sub = N.getOperand(1); | |||
7829 | EVT SubVT = Sub.getValueType(); | |||
7830 | unsigned NumSubElts = SubVT.getVectorNumElements(); | |||
7831 | if (!N->isOnlyUserOf(Sub.getNode())) | |||
7832 | return false; | |||
7833 | uint64_t InsertIdx = N.getConstantOperandVal(2); | |||
7834 | // Handle INSERT_SUBVECTOR(SRC0, EXTRACT_SUBVECTOR(SRC1)). | |||
7835 | if (Sub.getOpcode() == ISD::EXTRACT_SUBVECTOR && | |||
7836 | Sub.getOperand(0).getValueType() == VT) { | |||
7837 | uint64_t ExtractIdx = Sub.getConstantOperandVal(1); | |||
7838 | for (int i = 0; i != (int)NumElts; ++i) | |||
7839 | Mask.push_back(i); | |||
7840 | for (int i = 0; i != (int)NumSubElts; ++i) | |||
7841 | Mask[InsertIdx + i] = NumElts + ExtractIdx + i; | |||
7842 | Ops.push_back(Src); | |||
7843 | Ops.push_back(Sub.getOperand(0)); | |||
7844 | return true; | |||
7845 | } | |||
7846 | // Handle INSERT_SUBVECTOR(SRC0, SHUFFLE(SRC1)). | |||
7847 | SmallVector<int, 64> SubMask; | |||
7848 | SmallVector<SDValue, 2> SubInputs; | |||
7849 | if (!getTargetShuffleInputs(peekThroughOneUseBitcasts(Sub), SubInputs, | |||
7850 | SubMask, DAG, Depth + 1, ResolveKnownElts)) | |||
7851 | return false; | |||
7852 | ||||
7853 | // Subvector shuffle inputs must not be larger than the subvector. | |||
7854 | if (llvm::any_of(SubInputs, [SubVT](SDValue SubInput) { | |||
7855 | return SubVT.getFixedSizeInBits() < | |||
7856 | SubInput.getValueSizeInBits().getFixedSize(); | |||
7857 | })) | |||
7858 | return false; | |||
7859 | ||||
7860 | if (SubMask.size() != NumSubElts) { | |||
7861 | assert(((SubMask.size() % NumSubElts) == 0 ||(static_cast <bool> (((SubMask.size() % NumSubElts) == 0 || (NumSubElts % SubMask.size()) == 0) && "Illegal submask scale" ) ? void (0) : __assert_fail ("((SubMask.size() % NumSubElts) == 0 || (NumSubElts % SubMask.size()) == 0) && \"Illegal submask scale\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7862, __extension__ __PRETTY_FUNCTION__)) | |||
7862 | (NumSubElts % SubMask.size()) == 0) && "Illegal submask scale")(static_cast <bool> (((SubMask.size() % NumSubElts) == 0 || (NumSubElts % SubMask.size()) == 0) && "Illegal submask scale" ) ? void (0) : __assert_fail ("((SubMask.size() % NumSubElts) == 0 || (NumSubElts % SubMask.size()) == 0) && \"Illegal submask scale\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7862, __extension__ __PRETTY_FUNCTION__)); | |||
7863 | if ((NumSubElts % SubMask.size()) == 0) { | |||
7864 | int Scale = NumSubElts / SubMask.size(); | |||
7865 | SmallVector<int,64> ScaledSubMask; | |||
7866 | narrowShuffleMaskElts(Scale, SubMask, ScaledSubMask); | |||
7867 | SubMask = ScaledSubMask; | |||
7868 | } else { | |||
7869 | int Scale = SubMask.size() / NumSubElts; | |||
7870 | NumSubElts = SubMask.size(); | |||
7871 | NumElts *= Scale; | |||
7872 | InsertIdx *= Scale; | |||
7873 | } | |||
7874 | } | |||
7875 | Ops.push_back(Src); | |||
7876 | Ops.append(SubInputs.begin(), SubInputs.end()); | |||
7877 | if (ISD::isBuildVectorAllZeros(Src.getNode())) | |||
7878 | Mask.append(NumElts, SM_SentinelZero); | |||
7879 | else | |||
7880 | for (int i = 0; i != (int)NumElts; ++i) | |||
7881 | Mask.push_back(i); | |||
7882 | for (int i = 0; i != (int)NumSubElts; ++i) { | |||
7883 | int M = SubMask[i]; | |||
7884 | if (0 <= M) { | |||
7885 | int InputIdx = M / NumSubElts; | |||
7886 | M = (NumElts * (1 + InputIdx)) + (M % NumSubElts); | |||
7887 | } | |||
7888 | Mask[i + InsertIdx] = M; | |||
7889 | } | |||
7890 | return true; | |||
7891 | } | |||
7892 | case X86ISD::PINSRB: | |||
7893 | case X86ISD::PINSRW: | |||
7894 | case ISD::SCALAR_TO_VECTOR: | |||
7895 | case ISD::INSERT_VECTOR_ELT: { | |||
7896 | // Match against a insert_vector_elt/scalar_to_vector of an extract from a | |||
7897 | // vector, for matching src/dst vector types. | |||
7898 | SDValue Scl = N.getOperand(Opcode == ISD::SCALAR_TO_VECTOR ? 0 : 1); | |||
7899 | ||||
7900 | unsigned DstIdx = 0; | |||
7901 | if (Opcode != ISD::SCALAR_TO_VECTOR) { | |||
7902 | // Check we have an in-range constant insertion index. | |||
7903 | if (!isa<ConstantSDNode>(N.getOperand(2)) || | |||
7904 | N.getConstantOperandAPInt(2).uge(NumElts)) | |||
7905 | return false; | |||
7906 | DstIdx = N.getConstantOperandVal(2); | |||
7907 | ||||
7908 | // Attempt to recognise an INSERT*(VEC, 0, DstIdx) shuffle pattern. | |||
7909 | if (X86::isZeroNode(Scl)) { | |||
7910 | Ops.push_back(N.getOperand(0)); | |||
7911 | for (unsigned i = 0; i != NumElts; ++i) | |||
7912 | Mask.push_back(i == DstIdx ? SM_SentinelZero : (int)i); | |||
7913 | return true; | |||
7914 | } | |||
7915 | } | |||
7916 | ||||
7917 | // Peek through trunc/aext/zext. | |||
7918 | // TODO: aext shouldn't require SM_SentinelZero padding. | |||
7919 | // TODO: handle shift of scalars. | |||
7920 | unsigned MinBitsPerElt = Scl.getScalarValueSizeInBits(); | |||
7921 | while (Scl.getOpcode() == ISD::TRUNCATE || | |||
7922 | Scl.getOpcode() == ISD::ANY_EXTEND || | |||
7923 | Scl.getOpcode() == ISD::ZERO_EXTEND) { | |||
7924 | Scl = Scl.getOperand(0); | |||
7925 | MinBitsPerElt = | |||
7926 | std::min<unsigned>(MinBitsPerElt, Scl.getScalarValueSizeInBits()); | |||
7927 | } | |||
7928 | if ((MinBitsPerElt % 8) != 0) | |||
7929 | return false; | |||
7930 | ||||
7931 | // Attempt to find the source vector the scalar was extracted from. | |||
7932 | SDValue SrcExtract; | |||
7933 | if ((Scl.getOpcode() == ISD::EXTRACT_VECTOR_ELT || | |||
7934 | Scl.getOpcode() == X86ISD::PEXTRW || | |||
7935 | Scl.getOpcode() == X86ISD::PEXTRB) && | |||
7936 | Scl.getOperand(0).getValueSizeInBits() == NumSizeInBits) { | |||
7937 | SrcExtract = Scl; | |||
7938 | } | |||
7939 | if (!SrcExtract || !isa<ConstantSDNode>(SrcExtract.getOperand(1))) | |||
7940 | return false; | |||
7941 | ||||
7942 | SDValue SrcVec = SrcExtract.getOperand(0); | |||
7943 | EVT SrcVT = SrcVec.getValueType(); | |||
7944 | if (!SrcVT.getScalarType().isByteSized()) | |||
7945 | return false; | |||
7946 | unsigned SrcIdx = SrcExtract.getConstantOperandVal(1); | |||
7947 | unsigned SrcByte = SrcIdx * (SrcVT.getScalarSizeInBits() / 8); | |||
7948 | unsigned DstByte = DstIdx * NumBytesPerElt; | |||
7949 | MinBitsPerElt = | |||
7950 | std::min<unsigned>(MinBitsPerElt, SrcVT.getScalarSizeInBits()); | |||
7951 | ||||
7952 | // Create 'identity' byte level shuffle mask and then add inserted bytes. | |||
7953 | if (Opcode == ISD::SCALAR_TO_VECTOR) { | |||
7954 | Ops.push_back(SrcVec); | |||
7955 | Mask.append(NumSizeInBytes, SM_SentinelUndef); | |||
7956 | } else { | |||
7957 | Ops.push_back(SrcVec); | |||
7958 | Ops.push_back(N.getOperand(0)); | |||
7959 | for (int i = 0; i != (int)NumSizeInBytes; ++i) | |||
7960 | Mask.push_back(NumSizeInBytes + i); | |||
7961 | } | |||
7962 | ||||
7963 | unsigned MinBytesPerElts = MinBitsPerElt / 8; | |||
7964 | MinBytesPerElts = std::min(MinBytesPerElts, NumBytesPerElt); | |||
7965 | for (unsigned i = 0; i != MinBytesPerElts; ++i) | |||
7966 | Mask[DstByte + i] = SrcByte + i; | |||
7967 | for (unsigned i = MinBytesPerElts; i < NumBytesPerElt; ++i) | |||
7968 | Mask[DstByte + i] = SM_SentinelZero; | |||
7969 | return true; | |||
7970 | } | |||
7971 | case X86ISD::PACKSS: | |||
7972 | case X86ISD::PACKUS: { | |||
7973 | SDValue N0 = N.getOperand(0); | |||
7974 | SDValue N1 = N.getOperand(1); | |||
7975 | assert(N0.getValueType().getVectorNumElements() == (NumElts / 2) &&(static_cast <bool> (N0.getValueType().getVectorNumElements () == (NumElts / 2) && N1.getValueType().getVectorNumElements () == (NumElts / 2) && "Unexpected input value type") ? void (0) : __assert_fail ("N0.getValueType().getVectorNumElements() == (NumElts / 2) && N1.getValueType().getVectorNumElements() == (NumElts / 2) && \"Unexpected input value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7977, __extension__ __PRETTY_FUNCTION__)) | |||
7976 | N1.getValueType().getVectorNumElements() == (NumElts / 2) &&(static_cast <bool> (N0.getValueType().getVectorNumElements () == (NumElts / 2) && N1.getValueType().getVectorNumElements () == (NumElts / 2) && "Unexpected input value type") ? void (0) : __assert_fail ("N0.getValueType().getVectorNumElements() == (NumElts / 2) && N1.getValueType().getVectorNumElements() == (NumElts / 2) && \"Unexpected input value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7977, __extension__ __PRETTY_FUNCTION__)) | |||
7977 | "Unexpected input value type")(static_cast <bool> (N0.getValueType().getVectorNumElements () == (NumElts / 2) && N1.getValueType().getVectorNumElements () == (NumElts / 2) && "Unexpected input value type") ? void (0) : __assert_fail ("N0.getValueType().getVectorNumElements() == (NumElts / 2) && N1.getValueType().getVectorNumElements() == (NumElts / 2) && \"Unexpected input value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 7977, __extension__ __PRETTY_FUNCTION__)); | |||
7978 | ||||
7979 | APInt EltsLHS, EltsRHS; | |||
7980 | getPackDemandedElts(VT, DemandedElts, EltsLHS, EltsRHS); | |||
7981 | ||||
7982 | // If we know input saturation won't happen (or we don't care for particular | |||
7983 | // lanes), we can treat this as a truncation shuffle. | |||
7984 | bool Offset0 = false, Offset1 = false; | |||
7985 | if (Opcode == X86ISD::PACKSS) { | |||
7986 | if ((!(N0.isUndef() || EltsLHS.isNullValue()) && | |||
7987 | DAG.ComputeNumSignBits(N0, EltsLHS, Depth + 1) <= NumBitsPerElt) || | |||
7988 | (!(N1.isUndef() || EltsRHS.isNullValue()) && | |||
7989 | DAG.ComputeNumSignBits(N1, EltsRHS, Depth + 1) <= NumBitsPerElt)) | |||
7990 | return false; | |||
7991 | // We can't easily fold ASHR into a shuffle, but if it was feeding a | |||
7992 | // PACKSS then it was likely being used for sign-extension for a | |||
7993 | // truncation, so just peek through and adjust the mask accordingly. | |||
7994 | if (N0.getOpcode() == X86ISD::VSRAI && N->isOnlyUserOf(N0.getNode()) && | |||
7995 | N0.getConstantOperandAPInt(1) == NumBitsPerElt) { | |||
7996 | Offset0 = true; | |||
7997 | N0 = N0.getOperand(0); | |||
7998 | } | |||
7999 | if (N1.getOpcode() == X86ISD::VSRAI && N->isOnlyUserOf(N1.getNode()) && | |||
8000 | N1.getConstantOperandAPInt(1) == NumBitsPerElt) { | |||
8001 | Offset1 = true; | |||
8002 | N1 = N1.getOperand(0); | |||
8003 | } | |||
8004 | } else { | |||
8005 | APInt ZeroMask = APInt::getHighBitsSet(2 * NumBitsPerElt, NumBitsPerElt); | |||
8006 | if ((!(N0.isUndef() || EltsLHS.isNullValue()) && | |||
8007 | !DAG.MaskedValueIsZero(N0, ZeroMask, EltsLHS, Depth + 1)) || | |||
8008 | (!(N1.isUndef() || EltsRHS.isNullValue()) && | |||
8009 | !DAG.MaskedValueIsZero(N1, ZeroMask, EltsRHS, Depth + 1))) | |||
8010 | return false; | |||
8011 | } | |||
8012 | ||||
8013 | bool IsUnary = (N0 == N1); | |||
8014 | ||||
8015 | Ops.push_back(N0); | |||
8016 | if (!IsUnary) | |||
8017 | Ops.push_back(N1); | |||
8018 | ||||
8019 | createPackShuffleMask(VT, Mask, IsUnary); | |||
8020 | ||||
8021 | if (Offset0 || Offset1) { | |||
8022 | for (int &M : Mask) | |||
8023 | if ((Offset0 && isInRange(M, 0, NumElts)) || | |||
8024 | (Offset1 && isInRange(M, NumElts, 2 * NumElts))) | |||
8025 | ++M; | |||
8026 | } | |||
8027 | return true; | |||
8028 | } | |||
8029 | case X86ISD::VTRUNC: { | |||
8030 | SDValue Src = N.getOperand(0); | |||
8031 | EVT SrcVT = Src.getValueType(); | |||
8032 | // Truncated source must be a simple vector. | |||
8033 | if (!SrcVT.isSimple() || (SrcVT.getSizeInBits() % 128) != 0 || | |||
8034 | (SrcVT.getScalarSizeInBits() % 8) != 0) | |||
8035 | return false; | |||
8036 | unsigned NumSrcElts = SrcVT.getVectorNumElements(); | |||
8037 | unsigned NumBitsPerSrcElt = SrcVT.getScalarSizeInBits(); | |||
8038 | unsigned Scale = NumBitsPerSrcElt / NumBitsPerElt; | |||
8039 | assert((NumBitsPerSrcElt % NumBitsPerElt) == 0 && "Illegal truncation")(static_cast <bool> ((NumBitsPerSrcElt % NumBitsPerElt) == 0 && "Illegal truncation") ? void (0) : __assert_fail ("(NumBitsPerSrcElt % NumBitsPerElt) == 0 && \"Illegal truncation\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 8039, __extension__ __PRETTY_FUNCTION__)); | |||
8040 | for (unsigned i = 0; i != NumSrcElts; ++i) | |||
8041 | Mask.push_back(i * Scale); | |||
8042 | Mask.append(NumElts - NumSrcElts, SM_SentinelZero); | |||
8043 | Ops.push_back(Src); | |||
8044 | return true; | |||
8045 | } | |||
8046 | case X86ISD::VSHLI: | |||
8047 | case X86ISD::VSRLI: { | |||
8048 | uint64_t ShiftVal = N.getConstantOperandVal(1); | |||
8049 | // Out of range bit shifts are guaranteed to be zero. | |||
8050 | if (NumBitsPerElt <= ShiftVal) { | |||
8051 | Mask.append(NumElts, SM_SentinelZero); | |||
8052 | return true; | |||
8053 | } | |||
8054 | ||||
8055 | // We can only decode 'whole byte' bit shifts as shuffles. | |||
8056 | if ((ShiftVal % 8) != 0) | |||
8057 | break; | |||
8058 | ||||
8059 | uint64_t ByteShift = ShiftVal / 8; | |||
8060 | Ops.push_back(N.getOperand(0)); | |||
8061 | ||||
8062 | // Clear mask to all zeros and insert the shifted byte indices. | |||
8063 | Mask.append(NumSizeInBytes, SM_SentinelZero); | |||
8064 | ||||
8065 | if (X86ISD::VSHLI == Opcode) { | |||
8066 | for (unsigned i = 0; i != NumSizeInBytes; i += NumBytesPerElt) | |||
8067 | for (unsigned j = ByteShift; j != NumBytesPerElt; ++j) | |||
8068 | Mask[i + j] = i + j - ByteShift; | |||
8069 | } else { | |||
8070 | for (unsigned i = 0; i != NumSizeInBytes; i += NumBytesPerElt) | |||
8071 | for (unsigned j = ByteShift; j != NumBytesPerElt; ++j) | |||
8072 | Mask[i + j - ByteShift] = i + j; | |||
8073 | } | |||
8074 | return true; | |||
8075 | } | |||
8076 | case X86ISD::VROTLI: | |||
8077 | case X86ISD::VROTRI: { | |||
8078 | // We can only decode 'whole byte' bit rotates as shuffles. | |||
8079 | uint64_t RotateVal = N.getConstantOperandAPInt(1).urem(NumBitsPerElt); | |||
8080 | if ((RotateVal % 8) != 0) | |||
8081 | return false; | |||
8082 | Ops.push_back(N.getOperand(0)); | |||
8083 | int Offset = RotateVal / 8; | |||
8084 | Offset = (X86ISD::VROTLI == Opcode ? NumBytesPerElt - Offset : Offset); | |||
8085 | for (int i = 0; i != (int)NumElts; ++i) { | |||
8086 | int BaseIdx = i * NumBytesPerElt; | |||
8087 | for (int j = 0; j != (int)NumBytesPerElt; ++j) { | |||
8088 | Mask.push_back(BaseIdx + ((Offset + j) % NumBytesPerElt)); | |||
8089 | } | |||
8090 | } | |||
8091 | return true; | |||
8092 | } | |||
8093 | case X86ISD::VBROADCAST: { | |||
8094 | SDValue Src = N.getOperand(0); | |||
8095 | if (!Src.getSimpleValueType().isVector()) { | |||
8096 | if (Src.getOpcode() != ISD::EXTRACT_VECTOR_ELT || | |||
8097 | !isNullConstant(Src.getOperand(1)) || | |||
8098 | Src.getOperand(0).getValueType().getScalarType() != | |||
8099 | VT.getScalarType()) | |||
8100 | return false; | |||
8101 | Src = Src.getOperand(0); | |||
8102 | } | |||
8103 | Ops.push_back(Src); | |||
8104 | Mask.append(NumElts, 0); | |||
8105 | return true; | |||
8106 | } | |||
8107 | case ISD::ZERO_EXTEND: | |||
8108 | case ISD::ANY_EXTEND: | |||
8109 | case ISD::ZERO_EXTEND_VECTOR_INREG: | |||
8110 | case ISD::ANY_EXTEND_VECTOR_INREG: { | |||
8111 | SDValue Src = N.getOperand(0); | |||
8112 | EVT SrcVT = Src.getValueType(); | |||
8113 | ||||
8114 | // Extended source must be a simple vector. | |||
8115 | if (!SrcVT.isSimple() || (SrcVT.getSizeInBits() % 128) != 0 || | |||
8116 | (SrcVT.getScalarSizeInBits() % 8) != 0) | |||
8117 | return false; | |||
8118 | ||||
8119 | bool IsAnyExtend = | |||
8120 | (ISD::ANY_EXTEND == Opcode || ISD::ANY_EXTEND_VECTOR_INREG == Opcode); | |||
8121 | DecodeZeroExtendMask(SrcVT.getScalarSizeInBits(), NumBitsPerElt, NumElts, | |||
8122 | IsAnyExtend, Mask); | |||
8123 | Ops.push_back(Src); | |||
8124 | return true; | |||
8125 | } | |||
8126 | } | |||
8127 | ||||
8128 | return false; | |||
8129 | } | |||
8130 | ||||
8131 | /// Removes unused/repeated shuffle source inputs and adjusts the shuffle mask. | |||
8132 | static void resolveTargetShuffleInputsAndMask(SmallVectorImpl<SDValue> &Inputs, | |||
8133 | SmallVectorImpl<int> &Mask) { | |||
8134 | int MaskWidth = Mask.size(); | |||
8135 | SmallVector<SDValue, 16> UsedInputs; | |||
8136 | for (int i = 0, e = Inputs.size(); i < e; ++i) { | |||
8137 | int lo = UsedInputs.size() * MaskWidth; | |||
8138 | int hi = lo + MaskWidth; | |||
8139 | ||||
8140 | // Strip UNDEF input usage. | |||
8141 | if (Inputs[i].isUndef()) | |||
8142 | for (int &M : Mask) | |||
8143 | if ((lo <= M) && (M < hi)) | |||
8144 | M = SM_SentinelUndef; | |||
8145 | ||||
8146 | // Check for unused inputs. | |||
8147 | if (none_of(Mask, [lo, hi](int i) { return (lo <= i) && (i < hi); })) { | |||
8148 | for (int &M : Mask) | |||
8149 | if (lo <= M) | |||
8150 | M -= MaskWidth; | |||
8151 | continue; | |||
8152 | } | |||
8153 | ||||
8154 | // Check for repeated inputs. | |||
8155 | bool IsRepeat = false; | |||
8156 | for (int j = 0, ue = UsedInputs.size(); j != ue; ++j) { | |||
8157 | if (UsedInputs[j] != Inputs[i]) | |||
8158 | continue; | |||
8159 | for (int &M : Mask) | |||
8160 | if (lo <= M) | |||
8161 | M = (M < hi) ? ((M - lo) + (j * MaskWidth)) : (M - MaskWidth); | |||
8162 | IsRepeat = true; | |||
8163 | break; | |||
8164 | } | |||
8165 | if (IsRepeat) | |||
8166 | continue; | |||
8167 | ||||
8168 | UsedInputs.push_back(Inputs[i]); | |||
8169 | } | |||
8170 | Inputs = UsedInputs; | |||
8171 | } | |||
8172 | ||||
8173 | /// Calls getTargetShuffleAndZeroables to resolve a target shuffle mask's inputs | |||
8174 | /// and then sets the SM_SentinelUndef and SM_SentinelZero values. | |||
8175 | /// Returns true if the target shuffle mask was decoded. | |||
8176 | static bool getTargetShuffleInputs(SDValue Op, const APInt &DemandedElts, | |||
8177 | SmallVectorImpl<SDValue> &Inputs, | |||
8178 | SmallVectorImpl<int> &Mask, | |||
8179 | APInt &KnownUndef, APInt &KnownZero, | |||
8180 | const SelectionDAG &DAG, unsigned Depth, | |||
8181 | bool ResolveKnownElts) { | |||
8182 | EVT VT = Op.getValueType(); | |||
8183 | if (!VT.isSimple() || !VT.isVector()) | |||
8184 | return false; | |||
8185 | ||||
8186 | if (getTargetShuffleAndZeroables(Op, Mask, Inputs, KnownUndef, KnownZero)) { | |||
8187 | if (ResolveKnownElts) | |||
8188 | resolveTargetShuffleFromZeroables(Mask, KnownUndef, KnownZero); | |||
8189 | return true; | |||
8190 | } | |||
8191 | if (getFauxShuffleMask(Op, DemandedElts, Mask, Inputs, DAG, Depth, | |||
8192 | ResolveKnownElts)) { | |||
8193 | resolveZeroablesFromTargetShuffle(Mask, KnownUndef, KnownZero); | |||
8194 | return true; | |||
8195 | } | |||
8196 | return false; | |||
8197 | } | |||
8198 | ||||
8199 | static bool getTargetShuffleInputs(SDValue Op, SmallVectorImpl<SDValue> &Inputs, | |||
8200 | SmallVectorImpl<int> &Mask, | |||
8201 | const SelectionDAG &DAG, unsigned Depth = 0, | |||
8202 | bool ResolveKnownElts = true) { | |||
8203 | EVT VT = Op.getValueType(); | |||
8204 | if (!VT.isSimple() || !VT.isVector()) | |||
8205 | return false; | |||
8206 | ||||
8207 | APInt KnownUndef, KnownZero; | |||
8208 | unsigned NumElts = Op.getValueType().getVectorNumElements(); | |||
8209 | APInt DemandedElts = APInt::getAllOnesValue(NumElts); | |||
8210 | return getTargetShuffleInputs(Op, DemandedElts, Inputs, Mask, KnownUndef, | |||
8211 | KnownZero, DAG, Depth, ResolveKnownElts); | |||
8212 | } | |||
8213 | ||||
8214 | // Attempt to create a scalar/subvector broadcast from the base MemSDNode. | |||
8215 | static SDValue getBROADCAST_LOAD(unsigned Opcode, const SDLoc &DL, EVT VT, | |||
8216 | EVT MemVT, MemSDNode *Mem, unsigned Offset, | |||
8217 | SelectionDAG &DAG) { | |||
8218 | assert((Opcode == X86ISD::VBROADCAST_LOAD ||(static_cast <bool> ((Opcode == X86ISD::VBROADCAST_LOAD || Opcode == X86ISD::SUBV_BROADCAST_LOAD) && "Unknown broadcast load type" ) ? void (0) : __assert_fail ("(Opcode == X86ISD::VBROADCAST_LOAD || Opcode == X86ISD::SUBV_BROADCAST_LOAD) && \"Unknown broadcast load type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 8220, __extension__ __PRETTY_FUNCTION__)) | |||
8219 | Opcode == X86ISD::SUBV_BROADCAST_LOAD) &&(static_cast <bool> ((Opcode == X86ISD::VBROADCAST_LOAD || Opcode == X86ISD::SUBV_BROADCAST_LOAD) && "Unknown broadcast load type" ) ? void (0) : __assert_fail ("(Opcode == X86ISD::VBROADCAST_LOAD || Opcode == X86ISD::SUBV_BROADCAST_LOAD) && \"Unknown broadcast load type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 8220, __extension__ __PRETTY_FUNCTION__)) | |||
8220 | "Unknown broadcast load type")(static_cast <bool> ((Opcode == X86ISD::VBROADCAST_LOAD || Opcode == X86ISD::SUBV_BROADCAST_LOAD) && "Unknown broadcast load type" ) ? void (0) : __assert_fail ("(Opcode == X86ISD::VBROADCAST_LOAD || Opcode == X86ISD::SUBV_BROADCAST_LOAD) && \"Unknown broadcast load type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 8220, __extension__ __PRETTY_FUNCTION__)); | |||
8221 | ||||
8222 | // Ensure this is a simple (non-atomic, non-voltile), temporal read memop. | |||
8223 | if (!Mem || !Mem->readMem() || !Mem->isSimple() || Mem->isNonTemporal()) | |||
8224 | return SDValue(); | |||
8225 | ||||
8226 | SDValue Ptr = | |||
8227 | DAG.getMemBasePlusOffset(Mem->getBasePtr(), TypeSize::Fixed(Offset), DL); | |||
8228 | SDVTList Tys = DAG.getVTList(VT, MVT::Other); | |||
8229 | SDValue Ops[] = {Mem->getChain(), Ptr}; | |||
8230 | SDValue BcstLd = DAG.getMemIntrinsicNode( | |||
8231 | Opcode, DL, Tys, Ops, MemVT, | |||
8232 | DAG.getMachineFunction().getMachineMemOperand( | |||
8233 | Mem->getMemOperand(), Offset, MemVT.getStoreSize())); | |||
8234 | DAG.makeEquivalentMemoryOrdering(SDValue(Mem, 1), BcstLd.getValue(1)); | |||
8235 | return BcstLd; | |||
8236 | } | |||
8237 | ||||
8238 | /// Returns the scalar element that will make up the i'th | |||
8239 | /// element of the result of the vector shuffle. | |||
8240 | static SDValue getShuffleScalarElt(SDValue Op, unsigned Index, | |||
8241 | SelectionDAG &DAG, unsigned Depth) { | |||
8242 | if (Depth >= SelectionDAG::MaxRecursionDepth) | |||
8243 | return SDValue(); // Limit search depth. | |||
8244 | ||||
8245 | EVT VT = Op.getValueType(); | |||
8246 | unsigned Opcode = Op.getOpcode(); | |||
8247 | unsigned NumElems = VT.getVectorNumElements(); | |||
8248 | ||||
8249 | // Recurse into ISD::VECTOR_SHUFFLE node to find scalars. | |||
8250 | if (auto *SV = dyn_cast<ShuffleVectorSDNode>(Op)) { | |||
8251 | int Elt = SV->getMaskElt(Index); | |||
8252 | ||||
8253 | if (Elt < 0) | |||
8254 | return DAG.getUNDEF(VT.getVectorElementType()); | |||
8255 | ||||
8256 | SDValue Src = (Elt < (int)NumElems) ? SV->getOperand(0) : SV->getOperand(1); | |||
8257 | return getShuffleScalarElt(Src, Elt % NumElems, DAG, Depth + 1); | |||
8258 | } | |||
8259 | ||||
8260 | // Recurse into target specific vector shuffles to find scalars. | |||
8261 | if (isTargetShuffle(Opcode)) { | |||
8262 | MVT ShufVT = VT.getSimpleVT(); | |||
8263 | MVT ShufSVT = ShufVT.getVectorElementType(); | |||
8264 | int NumElems = (int)ShufVT.getVectorNumElements(); | |||
8265 | SmallVector<int, 16> ShuffleMask; | |||
8266 | SmallVector<SDValue, 16> ShuffleOps; | |||
8267 | if (!getTargetShuffleMask(Op.getNode(), ShufVT, true, ShuffleOps, | |||
8268 | ShuffleMask)) | |||
8269 | return SDValue(); | |||
8270 | ||||
8271 | int Elt = ShuffleMask[Index]; | |||
8272 | if (Elt == SM_SentinelZero) | |||
8273 | return ShufSVT.isInteger() ? DAG.getConstant(0, SDLoc(Op), ShufSVT) | |||
8274 | : DAG.getConstantFP(+0.0, SDLoc(Op), ShufSVT); | |||
8275 | if (Elt == SM_SentinelUndef) | |||
8276 | return DAG.getUNDEF(ShufSVT); | |||
8277 | ||||
8278 | assert(0 <= Elt && Elt < (2 * NumElems) && "Shuffle index out of range")(static_cast <bool> (0 <= Elt && Elt < (2 * NumElems) && "Shuffle index out of range") ? void ( 0) : __assert_fail ("0 <= Elt && Elt < (2 * NumElems) && \"Shuffle index out of range\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 8278, __extension__ __PRETTY_FUNCTION__)); | |||
8279 | SDValue Src = (Elt < NumElems) ? ShuffleOps[0] : ShuffleOps[1]; | |||
8280 | return getShuffleScalarElt(Src, Elt % NumElems, DAG, Depth + 1); | |||
8281 | } | |||
8282 | ||||
8283 | // Recurse into insert_subvector base/sub vector to find scalars. | |||
8284 | if (Opcode == ISD::INSERT_SUBVECTOR) { | |||
8285 | SDValue Vec = Op.getOperand(0); | |||
8286 | SDValue Sub = Op.getOperand(1); | |||
8287 | uint64_t SubIdx = Op.getConstantOperandVal(2); | |||
8288 | unsigned NumSubElts = Sub.getValueType().getVectorNumElements(); | |||
8289 | ||||
8290 | if (SubIdx <= Index && Index < (SubIdx + NumSubElts)) | |||
8291 | return getShuffleScalarElt(Sub, Index - SubIdx, DAG, Depth + 1); | |||
8292 | return getShuffleScalarElt(Vec, Index, DAG, Depth + 1); | |||
8293 | } | |||
8294 | ||||
8295 | // Recurse into concat_vectors sub vector to find scalars. | |||
8296 | if (Opcode == ISD::CONCAT_VECTORS) { | |||
8297 | EVT SubVT = Op.getOperand(0).getValueType(); | |||
8298 | unsigned NumSubElts = SubVT.getVectorNumElements(); | |||
8299 | uint64_t SubIdx = Index / NumSubElts; | |||
8300 | uint64_t SubElt = Index % NumSubElts; | |||
8301 | return getShuffleScalarElt(Op.getOperand(SubIdx), SubElt, DAG, Depth + 1); | |||
8302 | } | |||
8303 | ||||
8304 | // Recurse into extract_subvector src vector to find scalars. | |||
8305 | if (Opcode == ISD::EXTRACT_SUBVECTOR) { | |||
8306 | SDValue Src = Op.getOperand(0); | |||
8307 | uint64_t SrcIdx = Op.getConstantOperandVal(1); | |||
8308 | return getShuffleScalarElt(Src, Index + SrcIdx, DAG, Depth + 1); | |||
8309 | } | |||
8310 | ||||
8311 | // We only peek through bitcasts of the same vector width. | |||
8312 | if (Opcode == ISD::BITCAST) { | |||
8313 | SDValue Src = Op.getOperand(0); | |||
8314 | EVT SrcVT = Src.getValueType(); | |||
8315 | if (SrcVT.isVector() && SrcVT.getVectorNumElements() == NumElems) | |||
8316 | return getShuffleScalarElt(Src, Index, DAG, Depth + 1); | |||
8317 | return SDValue(); | |||
8318 | } | |||
8319 | ||||
8320 | // Actual nodes that may contain scalar elements | |||
8321 | ||||
8322 | // For insert_vector_elt - either return the index matching scalar or recurse | |||
8323 | // into the base vector. | |||
8324 | if (Opcode == ISD::INSERT_VECTOR_ELT && | |||
8325 | isa<ConstantSDNode>(Op.getOperand(2))) { | |||
8326 | if (Op.getConstantOperandAPInt(2) == Index) | |||
8327 | return Op.getOperand(1); | |||
8328 | return getShuffleScalarElt(Op.getOperand(0), Index, DAG, Depth + 1); | |||
8329 | } | |||
8330 | ||||
8331 | if (Opcode == ISD::SCALAR_TO_VECTOR) | |||
8332 | return (Index == 0) ? Op.getOperand(0) | |||
8333 | : DAG.getUNDEF(VT.getVectorElementType()); | |||
8334 | ||||
8335 | if (Opcode == ISD::BUILD_VECTOR) | |||
8336 | return Op.getOperand(Index); | |||
8337 | ||||
8338 | return SDValue(); | |||
8339 | } | |||
8340 | ||||
8341 | // Use PINSRB/PINSRW/PINSRD to create a build vector. | |||
8342 | static SDValue LowerBuildVectorAsInsert(SDValue Op, const APInt &NonZeroMask, | |||
8343 | unsigned NumNonZero, unsigned NumZero, | |||
8344 | SelectionDAG &DAG, | |||
8345 | const X86Subtarget &Subtarget) { | |||
8346 | MVT VT = Op.getSimpleValueType(); | |||
8347 | unsigned NumElts = VT.getVectorNumElements(); | |||
8348 | assert(((VT == MVT::v8i16 && Subtarget.hasSSE2()) ||(static_cast <bool> (((VT == MVT::v8i16 && Subtarget .hasSSE2()) || ((VT == MVT::v16i8 || VT == MVT::v4i32) && Subtarget.hasSSE41())) && "Illegal vector insertion" ) ? void (0) : __assert_fail ("((VT == MVT::v8i16 && Subtarget.hasSSE2()) || ((VT == MVT::v16i8 || VT == MVT::v4i32) && Subtarget.hasSSE41())) && \"Illegal vector insertion\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 8350, __extension__ __PRETTY_FUNCTION__)) | |||
8349 | ((VT == MVT::v16i8 || VT == MVT::v4i32) && Subtarget.hasSSE41())) &&(static_cast <bool> (((VT == MVT::v8i16 && Subtarget .hasSSE2()) || ((VT == MVT::v16i8 || VT == MVT::v4i32) && Subtarget.hasSSE41())) && "Illegal vector insertion" ) ? void (0) : __assert_fail ("((VT == MVT::v8i16 && Subtarget.hasSSE2()) || ((VT == MVT::v16i8 || VT == MVT::v4i32) && Subtarget.hasSSE41())) && \"Illegal vector insertion\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 8350, __extension__ __PRETTY_FUNCTION__)) | |||
8350 | "Illegal vector insertion")(static_cast <bool> (((VT == MVT::v8i16 && Subtarget .hasSSE2()) || ((VT == MVT::v16i8 || VT == MVT::v4i32) && Subtarget.hasSSE41())) && "Illegal vector insertion" ) ? void (0) : __assert_fail ("((VT == MVT::v8i16 && Subtarget.hasSSE2()) || ((VT == MVT::v16i8 || VT == MVT::v4i32) && Subtarget.hasSSE41())) && \"Illegal vector insertion\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 8350, __extension__ __PRETTY_FUNCTION__)); | |||
8351 | ||||
8352 | SDLoc dl(Op); | |||
8353 | SDValue V; | |||
8354 | bool First = true; | |||
8355 | ||||
8356 | for (unsigned i = 0; i < NumElts; ++i) { | |||
8357 | bool IsNonZero = NonZeroMask[i]; | |||
8358 | if (!IsNonZero) | |||
8359 | continue; | |||
8360 | ||||
8361 | // If the build vector contains zeros or our first insertion is not the | |||
8362 | // first index then insert into zero vector to break any register | |||
8363 | // dependency else use SCALAR_TO_VECTOR. | |||
8364 | if (First) { | |||
8365 | First = false; | |||
8366 | if (NumZero || 0 != i) | |||
8367 | V = getZeroVector(VT, Subtarget, DAG, dl); | |||
8368 | else { | |||
8369 | assert(0 == i && "Expected insertion into zero-index")(static_cast <bool> (0 == i && "Expected insertion into zero-index" ) ? void (0) : __assert_fail ("0 == i && \"Expected insertion into zero-index\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 8369, __extension__ __PRETTY_FUNCTION__)); | |||
8370 | V = DAG.getAnyExtOrTrunc(Op.getOperand(i), dl, MVT::i32); | |||
8371 | V = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32, V); | |||
8372 | V = DAG.getBitcast(VT, V); | |||
8373 | continue; | |||
8374 | } | |||
8375 | } | |||
8376 | V = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VT, V, Op.getOperand(i), | |||
8377 | DAG.getIntPtrConstant(i, dl)); | |||
8378 | } | |||
8379 | ||||
8380 | return V; | |||
8381 | } | |||
8382 | ||||
8383 | /// Custom lower build_vector of v16i8. | |||
8384 | static SDValue LowerBuildVectorv16i8(SDValue Op, const APInt &NonZeroMask, | |||
8385 | unsigned NumNonZero, unsigned NumZero, | |||
8386 | SelectionDAG &DAG, | |||
8387 | const X86Subtarget &Subtarget) { | |||
8388 | if (NumNonZero > 8 && !Subtarget.hasSSE41()) | |||
8389 | return SDValue(); | |||
8390 | ||||
8391 | // SSE4.1 - use PINSRB to insert each byte directly. | |||
8392 | if (Subtarget.hasSSE41()) | |||
8393 | return LowerBuildVectorAsInsert(Op, NonZeroMask, NumNonZero, NumZero, DAG, | |||
8394 | Subtarget); | |||
8395 | ||||
8396 | SDLoc dl(Op); | |||
8397 | SDValue V; | |||
8398 | ||||
8399 | // Pre-SSE4.1 - merge byte pairs and insert with PINSRW. | |||
8400 | for (unsigned i = 0; i < 16; i += 2) { | |||
8401 | bool ThisIsNonZero = NonZeroMask[i]; | |||
8402 | bool NextIsNonZero = NonZeroMask[i + 1]; | |||
8403 | if (!ThisIsNonZero && !NextIsNonZero) | |||
8404 | continue; | |||
8405 | ||||
8406 | // FIXME: Investigate combining the first 4 bytes as a i32 instead. | |||
8407 | SDValue Elt; | |||
8408 | if (ThisIsNonZero) { | |||
8409 | if (NumZero || NextIsNonZero) | |||
8410 | Elt = DAG.getZExtOrTrunc(Op.getOperand(i), dl, MVT::i32); | |||
8411 | else | |||
8412 | Elt = DAG.getAnyExtOrTrunc(Op.getOperand(i), dl, MVT::i32); | |||
8413 | } | |||
8414 | ||||
8415 | if (NextIsNonZero) { | |||
8416 | SDValue NextElt = Op.getOperand(i + 1); | |||
8417 | if (i == 0 && NumZero) | |||
8418 | NextElt = DAG.getZExtOrTrunc(NextElt, dl, MVT::i32); | |||
8419 | else | |||
8420 | NextElt = DAG.getAnyExtOrTrunc(NextElt, dl, MVT::i32); | |||
8421 | NextElt = DAG.getNode(ISD::SHL, dl, MVT::i32, NextElt, | |||
8422 | DAG.getConstant(8, dl, MVT::i8)); | |||
8423 | if (ThisIsNonZero) | |||
8424 | Elt = DAG.getNode(ISD::OR, dl, MVT::i32, NextElt, Elt); | |||
8425 | else | |||
8426 | Elt = NextElt; | |||
8427 | } | |||
8428 | ||||
8429 | // If our first insertion is not the first index or zeros are needed, then | |||
8430 | // insert into zero vector. Otherwise, use SCALAR_TO_VECTOR (leaves high | |||
8431 | // elements undefined). | |||
8432 | if (!V) { | |||
8433 | if (i != 0 || NumZero) | |||
8434 | V = getZeroVector(MVT::v8i16, Subtarget, DAG, dl); | |||
8435 | else { | |||
8436 | V = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32, Elt); | |||
8437 | V = DAG.getBitcast(MVT::v8i16, V); | |||
8438 | continue; | |||
8439 | } | |||
8440 | } | |||
8441 | Elt = DAG.getNode(ISD::TRUNCATE, dl, MVT::i16, Elt); | |||
8442 | V = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, V, Elt, | |||
8443 | DAG.getIntPtrConstant(i / 2, dl)); | |||
8444 | } | |||
8445 | ||||
8446 | return DAG.getBitcast(MVT::v16i8, V); | |||
8447 | } | |||
8448 | ||||
8449 | /// Custom lower build_vector of v8i16. | |||
8450 | static SDValue LowerBuildVectorv8i16(SDValue Op, const APInt &NonZeroMask, | |||
8451 | unsigned NumNonZero, unsigned NumZero, | |||
8452 | SelectionDAG &DAG, | |||
8453 | const X86Subtarget &Subtarget) { | |||
8454 | if (NumNonZero > 4 && !Subtarget.hasSSE41()) | |||
8455 | return SDValue(); | |||
8456 | ||||
8457 | // Use PINSRW to insert each byte directly. | |||
8458 | return LowerBuildVectorAsInsert(Op, NonZeroMask, NumNonZero, NumZero, DAG, | |||
8459 | Subtarget); | |||
8460 | } | |||
8461 | ||||
8462 | /// Custom lower build_vector of v4i32 or v4f32. | |||
8463 | static SDValue LowerBuildVectorv4x32(SDValue Op, SelectionDAG &DAG, | |||
8464 | const X86Subtarget &Subtarget) { | |||
8465 | // If this is a splat of a pair of elements, use MOVDDUP (unless the target | |||
8466 | // has XOP; in that case defer lowering to potentially use VPERMIL2PS). | |||
8467 | // Because we're creating a less complicated build vector here, we may enable | |||
8468 | // further folding of the MOVDDUP via shuffle transforms. | |||
8469 | if (Subtarget.hasSSE3() && !Subtarget.hasXOP() && | |||
8470 | Op.getOperand(0) == Op.getOperand(2) && | |||
8471 | Op.getOperand(1) == Op.getOperand(3) && | |||
8472 | Op.getOperand(0) != Op.getOperand(1)) { | |||
8473 | SDLoc DL(Op); | |||
8474 | MVT VT = Op.getSimpleValueType(); | |||
8475 | MVT EltVT = VT.getVectorElementType(); | |||
8476 | // Create a new build vector with the first 2 elements followed by undef | |||
8477 | // padding, bitcast to v2f64, duplicate, and bitcast back. | |||
8478 | SDValue Ops[4] = { Op.getOperand(0), Op.getOperand(1), | |||
8479 | DAG.getUNDEF(EltVT), DAG.getUNDEF(EltVT) }; | |||
8480 | SDValue NewBV = DAG.getBitcast(MVT::v2f64, DAG.getBuildVector(VT, DL, Ops)); | |||
8481 | SDValue Dup = DAG.getNode(X86ISD::MOVDDUP, DL, MVT::v2f64, NewBV); | |||
8482 | return DAG.getBitcast(VT, Dup); | |||
8483 | } | |||
8484 | ||||
8485 | // Find all zeroable elements. | |||
8486 | std::bitset<4> Zeroable, Undefs; | |||
8487 | for (int i = 0; i < 4; ++i) { | |||
8488 | SDValue Elt = Op.getOperand(i); | |||
8489 | Undefs[i] = Elt.isUndef(); | |||
8490 | Zeroable[i] = (Elt.isUndef() || X86::isZeroNode(Elt)); | |||
8491 | } | |||
8492 | assert(Zeroable.size() - Zeroable.count() > 1 &&(static_cast <bool> (Zeroable.size() - Zeroable.count() > 1 && "We expect at least two non-zero elements!" ) ? void (0) : __assert_fail ("Zeroable.size() - Zeroable.count() > 1 && \"We expect at least two non-zero elements!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 8493, __extension__ __PRETTY_FUNCTION__)) | |||
8493 | "We expect at least two non-zero elements!")(static_cast <bool> (Zeroable.size() - Zeroable.count() > 1 && "We expect at least two non-zero elements!" ) ? void (0) : __assert_fail ("Zeroable.size() - Zeroable.count() > 1 && \"We expect at least two non-zero elements!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 8493, __extension__ __PRETTY_FUNCTION__)); | |||
8494 | ||||
8495 | // We only know how to deal with build_vector nodes where elements are either | |||
8496 | // zeroable or extract_vector_elt with constant index. | |||
8497 | SDValue FirstNonZero; | |||
8498 | unsigned FirstNonZeroIdx; | |||
8499 | for (unsigned i = 0; i < 4; ++i) { | |||
8500 | if (Zeroable[i]) | |||
8501 | continue; | |||
8502 | SDValue Elt = Op.getOperand(i); | |||
8503 | if (Elt.getOpcode() != ISD::EXTRACT_VECTOR_ELT || | |||
8504 | !isa<ConstantSDNode>(Elt.getOperand(1))) | |||
8505 | return SDValue(); | |||
8506 | // Make sure that this node is extracting from a 128-bit vector. | |||
8507 | MVT VT = Elt.getOperand(0).getSimpleValueType(); | |||
8508 | if (!VT.is128BitVector()) | |||
8509 | return SDValue(); | |||
8510 | if (!FirstNonZero.getNode()) { | |||
8511 | FirstNonZero = Elt; | |||
8512 | FirstNonZeroIdx = i; | |||
8513 | } | |||
8514 | } | |||
8515 | ||||
8516 | assert(FirstNonZero.getNode() && "Unexpected build vector of all zeros!")(static_cast <bool> (FirstNonZero.getNode() && "Unexpected build vector of all zeros!" ) ? void (0) : __assert_fail ("FirstNonZero.getNode() && \"Unexpected build vector of all zeros!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 8516, __extension__ __PRETTY_FUNCTION__)); | |||
8517 | SDValue V1 = FirstNonZero.getOperand(0); | |||
8518 | MVT VT = V1.getSimpleValueType(); | |||
8519 | ||||
8520 | // See if this build_vector can be lowered as a blend with zero. | |||
8521 | SDValue Elt; | |||
8522 | unsigned EltMaskIdx, EltIdx; | |||
8523 | int Mask[4]; | |||
8524 | for (EltIdx = 0; EltIdx < 4; ++EltIdx) { | |||
8525 | if (Zeroable[EltIdx]) { | |||
8526 | // The zero vector will be on the right hand side. | |||
8527 | Mask[EltIdx] = EltIdx+4; | |||
8528 | continue; | |||
8529 | } | |||
8530 | ||||
8531 | Elt = Op->getOperand(EltIdx); | |||
8532 | // By construction, Elt is a EXTRACT_VECTOR_ELT with constant index. | |||
8533 | EltMaskIdx = Elt.getConstantOperandVal(1); | |||
8534 | if (Elt.getOperand(0) != V1 || EltMaskIdx != EltIdx) | |||
8535 | break; | |||
8536 | Mask[EltIdx] = EltIdx; | |||
8537 | } | |||
8538 | ||||
8539 | if (EltIdx == 4) { | |||
8540 | // Let the shuffle legalizer deal with blend operations. | |||
8541 | SDValue VZeroOrUndef = (Zeroable == Undefs) | |||
8542 | ? DAG.getUNDEF(VT) | |||
8543 | : getZeroVector(VT, Subtarget, DAG, SDLoc(Op)); | |||
8544 | if (V1.getSimpleValueType() != VT) | |||
8545 | V1 = DAG.getBitcast(VT, V1); | |||
8546 | return DAG.getVectorShuffle(VT, SDLoc(V1), V1, VZeroOrUndef, Mask); | |||
8547 | } | |||
8548 | ||||
8549 | // See if we can lower this build_vector to a INSERTPS. | |||
8550 | if (!Subtarget.hasSSE41()) | |||
8551 | return SDValue(); | |||
8552 | ||||
8553 | SDValue V2 = Elt.getOperand(0); | |||
8554 | if (Elt == FirstNonZero && EltIdx == FirstNonZeroIdx) | |||
8555 | V1 = SDValue(); | |||
8556 | ||||
8557 | bool CanFold = true; | |||
8558 | for (unsigned i = EltIdx + 1; i < 4 && CanFold; ++i) { | |||
8559 | if (Zeroable[i]) | |||
8560 | continue; | |||
8561 | ||||
8562 | SDValue Current = Op->getOperand(i); | |||
8563 | SDValue SrcVector = Current->getOperand(0); | |||
8564 | if (!V1.getNode()) | |||
8565 | V1 = SrcVector; | |||
8566 | CanFold = (SrcVector == V1) && (Current.getConstantOperandAPInt(1) == i); | |||
8567 | } | |||
8568 | ||||
8569 | if (!CanFold) | |||
8570 | return SDValue(); | |||
8571 | ||||
8572 | assert(V1.getNode() && "Expected at least two non-zero elements!")(static_cast <bool> (V1.getNode() && "Expected at least two non-zero elements!" ) ? void (0) : __assert_fail ("V1.getNode() && \"Expected at least two non-zero elements!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 8572, __extension__ __PRETTY_FUNCTION__)); | |||
8573 | if (V1.getSimpleValueType() != MVT::v4f32) | |||
8574 | V1 = DAG.getBitcast(MVT::v4f32, V1); | |||
8575 | if (V2.getSimpleValueType() != MVT::v4f32) | |||
8576 | V2 = DAG.getBitcast(MVT::v4f32, V2); | |||
8577 | ||||
8578 | // Ok, we can emit an INSERTPS instruction. | |||
8579 | unsigned ZMask = Zeroable.to_ulong(); | |||
8580 | ||||
8581 | unsigned InsertPSMask = EltMaskIdx << 6 | EltIdx << 4 | ZMask; | |||
8582 | assert((InsertPSMask & ~0xFFu) == 0 && "Invalid mask!")(static_cast <bool> ((InsertPSMask & ~0xFFu) == 0 && "Invalid mask!") ? void (0) : __assert_fail ("(InsertPSMask & ~0xFFu) == 0 && \"Invalid mask!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 8582, __extension__ __PRETTY_FUNCTION__)); | |||
8583 | SDLoc DL(Op); | |||
8584 | SDValue Result = DAG.getNode(X86ISD::INSERTPS, DL, MVT::v4f32, V1, V2, | |||
8585 | DAG.getIntPtrConstant(InsertPSMask, DL, true)); | |||
8586 | return DAG.getBitcast(VT, Result); | |||
8587 | } | |||
8588 | ||||
8589 | /// Return a vector logical shift node. | |||
8590 | static SDValue getVShift(bool isLeft, EVT VT, SDValue SrcOp, unsigned NumBits, | |||
8591 | SelectionDAG &DAG, const TargetLowering &TLI, | |||
8592 | const SDLoc &dl) { | |||
8593 | assert(VT.is128BitVector() && "Unknown type for VShift")(static_cast <bool> (VT.is128BitVector() && "Unknown type for VShift" ) ? void (0) : __assert_fail ("VT.is128BitVector() && \"Unknown type for VShift\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 8593, __extension__ __PRETTY_FUNCTION__)); | |||
8594 | MVT ShVT = MVT::v16i8; | |||
8595 | unsigned Opc = isLeft ? X86ISD::VSHLDQ : X86ISD::VSRLDQ; | |||
8596 | SrcOp = DAG.getBitcast(ShVT, SrcOp); | |||
8597 | assert(NumBits % 8 == 0 && "Only support byte sized shifts")(static_cast <bool> (NumBits % 8 == 0 && "Only support byte sized shifts" ) ? void (0) : __assert_fail ("NumBits % 8 == 0 && \"Only support byte sized shifts\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 8597, __extension__ __PRETTY_FUNCTION__)); | |||
8598 | SDValue ShiftVal = DAG.getTargetConstant(NumBits / 8, dl, MVT::i8); | |||
8599 | return DAG.getBitcast(VT, DAG.getNode(Opc, dl, ShVT, SrcOp, ShiftVal)); | |||
8600 | } | |||
8601 | ||||
8602 | static SDValue LowerAsSplatVectorLoad(SDValue SrcOp, MVT VT, const SDLoc &dl, | |||
8603 | SelectionDAG &DAG) { | |||
8604 | ||||
8605 | // Check if the scalar load can be widened into a vector load. And if | |||
8606 | // the address is "base + cst" see if the cst can be "absorbed" into | |||
8607 | // the shuffle mask. | |||
8608 | if (LoadSDNode *LD = dyn_cast<LoadSDNode>(SrcOp)) { | |||
8609 | SDValue Ptr = LD->getBasePtr(); | |||
8610 | if (!ISD::isNormalLoad(LD) || !LD->isSimple()) | |||
8611 | return SDValue(); | |||
8612 | EVT PVT = LD->getValueType(0); | |||
8613 | if (PVT != MVT::i32 && PVT != MVT::f32) | |||
8614 | return SDValue(); | |||
8615 | ||||
8616 | int FI = -1; | |||
8617 | int64_t Offset = 0; | |||
8618 | if (FrameIndexSDNode *FINode = dyn_cast<FrameIndexSDNode>(Ptr)) { | |||
8619 | FI = FINode->getIndex(); | |||
8620 | Offset = 0; | |||
8621 | } else if (DAG.isBaseWithConstantOffset(Ptr) && | |||
8622 | isa<FrameIndexSDNode>(Ptr.getOperand(0))) { | |||
8623 | FI = cast<FrameIndexSDNode>(Ptr.getOperand(0))->getIndex(); | |||
8624 | Offset = Ptr.getConstantOperandVal(1); | |||
8625 | Ptr = Ptr.getOperand(0); | |||
8626 | } else { | |||
8627 | return SDValue(); | |||
8628 | } | |||
8629 | ||||
8630 | // FIXME: 256-bit vector instructions don't require a strict alignment, | |||
8631 | // improve this code to support it better. | |||
8632 | Align RequiredAlign(VT.getSizeInBits() / 8); | |||
8633 | SDValue Chain = LD->getChain(); | |||
8634 | // Make sure the stack object alignment is at least 16 or 32. | |||
8635 | MachineFrameInfo &MFI = DAG.getMachineFunction().getFrameInfo(); | |||
8636 | MaybeAlign InferredAlign = DAG.InferPtrAlign(Ptr); | |||
8637 | if (!InferredAlign || *InferredAlign < RequiredAlign) { | |||
8638 | if (MFI.isFixedObjectIndex(FI)) { | |||
8639 | // Can't change the alignment. FIXME: It's possible to compute | |||
8640 | // the exact stack offset and reference FI + adjust offset instead. | |||
8641 | // If someone *really* cares about this. That's the way to implement it. | |||
8642 | return SDValue(); | |||
8643 | } else { | |||
8644 | MFI.setObjectAlignment(FI, RequiredAlign); | |||
8645 | } | |||
8646 | } | |||
8647 | ||||
8648 | // (Offset % 16 or 32) must be multiple of 4. Then address is then | |||
8649 | // Ptr + (Offset & ~15). | |||
8650 | if (Offset < 0) | |||
8651 | return SDValue(); | |||
8652 | if ((Offset % RequiredAlign.value()) & 3) | |||
8653 | return SDValue(); | |||
8654 | int64_t StartOffset = Offset & ~int64_t(RequiredAlign.value() - 1); | |||
8655 | if (StartOffset) { | |||
8656 | SDLoc DL(Ptr); | |||
8657 | Ptr = DAG.getNode(ISD::ADD, DL, Ptr.getValueType(), Ptr, | |||
8658 | DAG.getConstant(StartOffset, DL, Ptr.getValueType())); | |||
8659 | } | |||
8660 | ||||
8661 | int EltNo = (Offset - StartOffset) >> 2; | |||
8662 | unsigned NumElems = VT.getVectorNumElements(); | |||
8663 | ||||
8664 | EVT NVT = EVT::getVectorVT(*DAG.getContext(), PVT, NumElems); | |||
8665 | SDValue V1 = DAG.getLoad(NVT, dl, Chain, Ptr, | |||
8666 | LD->getPointerInfo().getWithOffset(StartOffset)); | |||
8667 | ||||
8668 | SmallVector<int, 8> Mask(NumElems, EltNo); | |||
8669 | ||||
8670 | return DAG.getVectorShuffle(NVT, dl, V1, DAG.getUNDEF(NVT), Mask); | |||
8671 | } | |||
8672 | ||||
8673 | return SDValue(); | |||
8674 | } | |||
8675 | ||||
8676 | // Recurse to find a LoadSDNode source and the accumulated ByteOffest. | |||
8677 | static bool findEltLoadSrc(SDValue Elt, LoadSDNode *&Ld, int64_t &ByteOffset) { | |||
8678 | if (ISD::isNON_EXTLoad(Elt.getNode())) { | |||
8679 | auto *BaseLd = cast<LoadSDNode>(Elt); | |||
8680 | if (!BaseLd->isSimple()) | |||
8681 | return false; | |||
8682 | Ld = BaseLd; | |||
8683 | ByteOffset = 0; | |||
8684 | return true; | |||
8685 | } | |||
8686 | ||||
8687 | switch (Elt.getOpcode()) { | |||
8688 | case ISD::BITCAST: | |||
8689 | case ISD::TRUNCATE: | |||
8690 | case ISD::SCALAR_TO_VECTOR: | |||
8691 | return findEltLoadSrc(Elt.getOperand(0), Ld, ByteOffset); | |||
8692 | case ISD::SRL: | |||
8693 | if (auto *IdxC = dyn_cast<ConstantSDNode>(Elt.getOperand(1))) { | |||
8694 | uint64_t Idx = IdxC->getZExtValue(); | |||
8695 | if ((Idx % 8) == 0 && findEltLoadSrc(Elt.getOperand(0), Ld, ByteOffset)) { | |||
8696 | ByteOffset += Idx / 8; | |||
8697 | return true; | |||
8698 | } | |||
8699 | } | |||
8700 | break; | |||
8701 | case ISD::EXTRACT_VECTOR_ELT: | |||
8702 | if (auto *IdxC = dyn_cast<ConstantSDNode>(Elt.getOperand(1))) { | |||
8703 | SDValue Src = Elt.getOperand(0); | |||
8704 | unsigned SrcSizeInBits = Src.getScalarValueSizeInBits(); | |||
8705 | unsigned DstSizeInBits = Elt.getScalarValueSizeInBits(); | |||
8706 | if (DstSizeInBits == SrcSizeInBits && (SrcSizeInBits % 8) == 0 && | |||
8707 | findEltLoadSrc(Src, Ld, ByteOffset)) { | |||
8708 | uint64_t Idx = IdxC->getZExtValue(); | |||
8709 | ByteOffset += Idx * (SrcSizeInBits / 8); | |||
8710 | return true; | |||
8711 | } | |||
8712 | } | |||
8713 | break; | |||
8714 | } | |||
8715 | ||||
8716 | return false; | |||
8717 | } | |||
8718 | ||||
8719 | /// Given the initializing elements 'Elts' of a vector of type 'VT', see if the | |||
8720 | /// elements can be replaced by a single large load which has the same value as | |||
8721 | /// a build_vector or insert_subvector whose loaded operands are 'Elts'. | |||
8722 | /// | |||
8723 | /// Example: <load i32 *a, load i32 *a+4, zero, undef> -> zextload a | |||
8724 | static SDValue EltsFromConsecutiveLoads(EVT VT, ArrayRef<SDValue> Elts, | |||
8725 | const SDLoc &DL, SelectionDAG &DAG, | |||
8726 | const X86Subtarget &Subtarget, | |||
8727 | bool IsAfterLegalize) { | |||
8728 | if ((VT.getScalarSizeInBits() % 8) != 0) | |||
8729 | return SDValue(); | |||
8730 | ||||
8731 | unsigned NumElems = Elts.size(); | |||
8732 | ||||
8733 | int LastLoadedElt = -1; | |||
8734 | APInt LoadMask = APInt::getNullValue(NumElems); | |||
8735 | APInt ZeroMask = APInt::getNullValue(NumElems); | |||
8736 | APInt UndefMask = APInt::getNullValue(NumElems); | |||
8737 | ||||
8738 | SmallVector<LoadSDNode*, 8> Loads(NumElems, nullptr); | |||
8739 | SmallVector<int64_t, 8> ByteOffsets(NumElems, 0); | |||
8740 | ||||
8741 | // For each element in the initializer, see if we've found a load, zero or an | |||
8742 | // undef. | |||
8743 | for (unsigned i = 0; i < NumElems; ++i) { | |||
8744 | SDValue Elt = peekThroughBitcasts(Elts[i]); | |||
8745 | if (!Elt.getNode()) | |||
8746 | return SDValue(); | |||
8747 | if (Elt.isUndef()) { | |||
8748 | UndefMask.setBit(i); | |||
8749 | continue; | |||
8750 | } | |||
8751 | if (X86::isZeroNode(Elt) || ISD::isBuildVectorAllZeros(Elt.getNode())) { | |||
8752 | ZeroMask.setBit(i); | |||
8753 | continue; | |||
8754 | } | |||
8755 | ||||
8756 | // Each loaded element must be the correct fractional portion of the | |||
8757 | // requested vector load. | |||
8758 | unsigned EltSizeInBits = Elt.getValueSizeInBits(); | |||
8759 | if ((NumElems * EltSizeInBits) != VT.getSizeInBits()) | |||
8760 | return SDValue(); | |||
8761 | ||||
8762 | if (!findEltLoadSrc(Elt, Loads[i], ByteOffsets[i]) || ByteOffsets[i] < 0) | |||
8763 | return SDValue(); | |||
8764 | unsigned LoadSizeInBits = Loads[i]->getValueSizeInBits(0); | |||
8765 | if (((ByteOffsets[i] * 8) + EltSizeInBits) > LoadSizeInBits) | |||
8766 | return SDValue(); | |||
8767 | ||||
8768 | LoadMask.setBit(i); | |||
8769 | LastLoadedElt = i; | |||
8770 | } | |||
8771 | assert((ZeroMask.countPopulation() + UndefMask.countPopulation() +(static_cast <bool> ((ZeroMask.countPopulation() + UndefMask .countPopulation() + LoadMask.countPopulation()) == NumElems && "Incomplete element masks") ? void (0) : __assert_fail ("(ZeroMask.countPopulation() + UndefMask.countPopulation() + LoadMask.countPopulation()) == NumElems && \"Incomplete element masks\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 8773, __extension__ __PRETTY_FUNCTION__)) | |||
8772 | LoadMask.countPopulation()) == NumElems &&(static_cast <bool> ((ZeroMask.countPopulation() + UndefMask .countPopulation() + LoadMask.countPopulation()) == NumElems && "Incomplete element masks") ? void (0) : __assert_fail ("(ZeroMask.countPopulation() + UndefMask.countPopulation() + LoadMask.countPopulation()) == NumElems && \"Incomplete element masks\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 8773, __extension__ __PRETTY_FUNCTION__)) | |||
8773 | "Incomplete element masks")(static_cast <bool> ((ZeroMask.countPopulation() + UndefMask .countPopulation() + LoadMask.countPopulation()) == NumElems && "Incomplete element masks") ? void (0) : __assert_fail ("(ZeroMask.countPopulation() + UndefMask.countPopulation() + LoadMask.countPopulation()) == NumElems && \"Incomplete element masks\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 8773, __extension__ __PRETTY_FUNCTION__)); | |||
8774 | ||||
8775 | // Handle Special Cases - all undef or undef/zero. | |||
8776 | if (UndefMask.countPopulation() == NumElems) | |||
8777 | return DAG.getUNDEF(VT); | |||
8778 | if ((ZeroMask.countPopulation() + UndefMask.countPopulation()) == NumElems) | |||
8779 | return VT.isInteger() ? DAG.getConstant(0, DL, VT) | |||
8780 | : DAG.getConstantFP(0.0, DL, VT); | |||
8781 | ||||
8782 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
8783 | int FirstLoadedElt = LoadMask.countTrailingZeros(); | |||
8784 | SDValue EltBase = peekThroughBitcasts(Elts[FirstLoadedElt]); | |||
8785 | EVT EltBaseVT = EltBase.getValueType(); | |||
8786 | assert(EltBaseVT.getSizeInBits() == EltBaseVT.getStoreSizeInBits() &&(static_cast <bool> (EltBaseVT.getSizeInBits() == EltBaseVT .getStoreSizeInBits() && "Register/Memory size mismatch" ) ? void (0) : __assert_fail ("EltBaseVT.getSizeInBits() == EltBaseVT.getStoreSizeInBits() && \"Register/Memory size mismatch\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 8787, __extension__ __PRETTY_FUNCTION__)) | |||
8787 | "Register/Memory size mismatch")(static_cast <bool> (EltBaseVT.getSizeInBits() == EltBaseVT .getStoreSizeInBits() && "Register/Memory size mismatch" ) ? void (0) : __assert_fail ("EltBaseVT.getSizeInBits() == EltBaseVT.getStoreSizeInBits() && \"Register/Memory size mismatch\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 8787, __extension__ __PRETTY_FUNCTION__)); | |||
8788 | LoadSDNode *LDBase = Loads[FirstLoadedElt]; | |||
8789 | assert(LDBase && "Did not find base load for merging consecutive loads")(static_cast <bool> (LDBase && "Did not find base load for merging consecutive loads" ) ? void (0) : __assert_fail ("LDBase && \"Did not find base load for merging consecutive loads\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 8789, __extension__ __PRETTY_FUNCTION__)); | |||
8790 | unsigned BaseSizeInBits = EltBaseVT.getStoreSizeInBits(); | |||
8791 | unsigned BaseSizeInBytes = BaseSizeInBits / 8; | |||
8792 | int NumLoadedElts = (1 + LastLoadedElt - FirstLoadedElt); | |||
8793 | int LoadSizeInBits = NumLoadedElts * BaseSizeInBits; | |||
8794 | assert((BaseSizeInBits % 8) == 0 && "Sub-byte element loads detected")(static_cast <bool> ((BaseSizeInBits % 8) == 0 && "Sub-byte element loads detected") ? void (0) : __assert_fail ("(BaseSizeInBits % 8) == 0 && \"Sub-byte element loads detected\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 8794, __extension__ __PRETTY_FUNCTION__)); | |||
8795 | ||||
8796 | // TODO: Support offsetting the base load. | |||
8797 | if (ByteOffsets[FirstLoadedElt] != 0) | |||
8798 | return SDValue(); | |||
8799 | ||||
8800 | // Check to see if the element's load is consecutive to the base load | |||
8801 | // or offset from a previous (already checked) load. | |||
8802 | auto CheckConsecutiveLoad = [&](LoadSDNode *Base, int EltIdx) { | |||
8803 | LoadSDNode *Ld = Loads[EltIdx]; | |||
8804 | int64_t ByteOffset = ByteOffsets[EltIdx]; | |||
8805 | if (ByteOffset && (ByteOffset % BaseSizeInBytes) == 0) { | |||
8806 | int64_t BaseIdx = EltIdx - (ByteOffset / BaseSizeInBytes); | |||
8807 | return (0 <= BaseIdx && BaseIdx < (int)NumElems && LoadMask[BaseIdx] && | |||
8808 | Loads[BaseIdx] == Ld && ByteOffsets[BaseIdx] == 0); | |||
8809 | } | |||
8810 | return DAG.areNonVolatileConsecutiveLoads(Ld, Base, BaseSizeInBytes, | |||
8811 | EltIdx - FirstLoadedElt); | |||
8812 | }; | |||
8813 | ||||
8814 | // Consecutive loads can contain UNDEFS but not ZERO elements. | |||
8815 | // Consecutive loads with UNDEFs and ZEROs elements require a | |||
8816 | // an additional shuffle stage to clear the ZERO elements. | |||
8817 | bool IsConsecutiveLoad = true; | |||
8818 | bool IsConsecutiveLoadWithZeros = true; | |||
8819 | for (int i = FirstLoadedElt + 1; i <= LastLoadedElt; ++i) { | |||
8820 | if (LoadMask[i]) { | |||
8821 | if (!CheckConsecutiveLoad(LDBase, i)) { | |||
8822 | IsConsecutiveLoad = false; | |||
8823 | IsConsecutiveLoadWithZeros = false; | |||
8824 | break; | |||
8825 | } | |||
8826 | } else if (ZeroMask[i]) { | |||
8827 | IsConsecutiveLoad = false; | |||
8828 | } | |||
8829 | } | |||
8830 | ||||
8831 | auto CreateLoad = [&DAG, &DL, &Loads](EVT VT, LoadSDNode *LDBase) { | |||
8832 | auto MMOFlags = LDBase->getMemOperand()->getFlags(); | |||
8833 | assert(LDBase->isSimple() &&(static_cast <bool> (LDBase->isSimple() && "Cannot merge volatile or atomic loads." ) ? void (0) : __assert_fail ("LDBase->isSimple() && \"Cannot merge volatile or atomic loads.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 8834, __extension__ __PRETTY_FUNCTION__)) | |||
8834 | "Cannot merge volatile or atomic loads.")(static_cast <bool> (LDBase->isSimple() && "Cannot merge volatile or atomic loads." ) ? void (0) : __assert_fail ("LDBase->isSimple() && \"Cannot merge volatile or atomic loads.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 8834, __extension__ __PRETTY_FUNCTION__)); | |||
8835 | SDValue NewLd = | |||
8836 | DAG.getLoad(VT, DL, LDBase->getChain(), LDBase->getBasePtr(), | |||
8837 | LDBase->getPointerInfo(), LDBase->getOriginalAlign(), | |||
8838 | MMOFlags); | |||
8839 | for (auto *LD : Loads) | |||
8840 | if (LD) | |||
8841 | DAG.makeEquivalentMemoryOrdering(LD, NewLd); | |||
8842 | return NewLd; | |||
8843 | }; | |||
8844 | ||||
8845 | // Check if the base load is entirely dereferenceable. | |||
8846 | bool IsDereferenceable = LDBase->getPointerInfo().isDereferenceable( | |||
8847 | VT.getSizeInBits() / 8, *DAG.getContext(), DAG.getDataLayout()); | |||
8848 | ||||
8849 | // LOAD - all consecutive load/undefs (must start/end with a load or be | |||
8850 | // entirely dereferenceable). If we have found an entire vector of loads and | |||
8851 | // undefs, then return a large load of the entire vector width starting at the | |||
8852 | // base pointer. If the vector contains zeros, then attempt to shuffle those | |||
8853 | // elements. | |||
8854 | if (FirstLoadedElt == 0 && | |||
8855 | (NumLoadedElts == (int)NumElems || IsDereferenceable) && | |||
8856 | (IsConsecutiveLoad || IsConsecutiveLoadWithZeros)) { | |||
8857 | if (IsAfterLegalize && !TLI.isOperationLegal(ISD::LOAD, VT)) | |||
8858 | return SDValue(); | |||
8859 | ||||
8860 | // Don't create 256-bit non-temporal aligned loads without AVX2 as these | |||
8861 | // will lower to regular temporal loads and use the cache. | |||
8862 | if (LDBase->isNonTemporal() && LDBase->getAlignment() >= 32 && | |||
8863 | VT.is256BitVector() && !Subtarget.hasInt256()) | |||
8864 | return SDValue(); | |||
8865 | ||||
8866 | if (NumElems == 1) | |||
8867 | return DAG.getBitcast(VT, Elts[FirstLoadedElt]); | |||
8868 | ||||
8869 | if (!ZeroMask) | |||
8870 | return CreateLoad(VT, LDBase); | |||
8871 | ||||
8872 | // IsConsecutiveLoadWithZeros - we need to create a shuffle of the loaded | |||
8873 | // vector and a zero vector to clear out the zero elements. | |||
8874 | if (!IsAfterLegalize && VT.isVector()) { | |||
8875 | unsigned NumMaskElts = VT.getVectorNumElements(); | |||
8876 | if ((NumMaskElts % NumElems) == 0) { | |||
8877 | unsigned Scale = NumMaskElts / NumElems; | |||
8878 | SmallVector<int, 4> ClearMask(NumMaskElts, -1); | |||
8879 | for (unsigned i = 0; i < NumElems; ++i) { | |||
8880 | if (UndefMask[i]) | |||
8881 | continue; | |||
8882 | int Offset = ZeroMask[i] ? NumMaskElts : 0; | |||
8883 | for (unsigned j = 0; j != Scale; ++j) | |||
8884 | ClearMask[(i * Scale) + j] = (i * Scale) + j + Offset; | |||
8885 | } | |||
8886 | SDValue V = CreateLoad(VT, LDBase); | |||
8887 | SDValue Z = VT.isInteger() ? DAG.getConstant(0, DL, VT) | |||
8888 | : DAG.getConstantFP(0.0, DL, VT); | |||
8889 | return DAG.getVectorShuffle(VT, DL, V, Z, ClearMask); | |||
8890 | } | |||
8891 | } | |||
8892 | } | |||
8893 | ||||
8894 | // If the upper half of a ymm/zmm load is undef then just load the lower half. | |||
8895 | if (VT.is256BitVector() || VT.is512BitVector()) { | |||
8896 | unsigned HalfNumElems = NumElems / 2; | |||
8897 | if (UndefMask.extractBits(HalfNumElems, HalfNumElems).isAllOnesValue()) { | |||
8898 | EVT HalfVT = | |||
8899 | EVT::getVectorVT(*DAG.getContext(), VT.getScalarType(), HalfNumElems); | |||
8900 | SDValue HalfLD = | |||
8901 | EltsFromConsecutiveLoads(HalfVT, Elts.drop_back(HalfNumElems), DL, | |||
8902 | DAG, Subtarget, IsAfterLegalize); | |||
8903 | if (HalfLD) | |||
8904 | return DAG.getNode(ISD::INSERT_SUBVECTOR, DL, VT, DAG.getUNDEF(VT), | |||
8905 | HalfLD, DAG.getIntPtrConstant(0, DL)); | |||
8906 | } | |||
8907 | } | |||
8908 | ||||
8909 | // VZEXT_LOAD - consecutive 32/64-bit load/undefs followed by zeros/undefs. | |||
8910 | if (IsConsecutiveLoad && FirstLoadedElt == 0 && | |||
8911 | ((LoadSizeInBits == 16 && Subtarget.hasFP16()) || LoadSizeInBits == 32 || | |||
8912 | LoadSizeInBits == 64) && | |||
8913 | ((VT.is128BitVector() || VT.is256BitVector() || VT.is512BitVector()))) { | |||
8914 | MVT VecSVT = VT.isFloatingPoint() ? MVT::getFloatingPointVT(LoadSizeInBits) | |||
8915 | : MVT::getIntegerVT(LoadSizeInBits); | |||
8916 | MVT VecVT = MVT::getVectorVT(VecSVT, VT.getSizeInBits() / LoadSizeInBits); | |||
8917 | // Allow v4f32 on SSE1 only targets. | |||
8918 | // FIXME: Add more isel patterns so we can just use VT directly. | |||
8919 | if (!Subtarget.hasSSE2() && VT == MVT::v4f32) | |||
8920 | VecVT = MVT::v4f32; | |||
8921 | if (TLI.isTypeLegal(VecVT)) { | |||
8922 | SDVTList Tys = DAG.getVTList(VecVT, MVT::Other); | |||
8923 | SDValue Ops[] = { LDBase->getChain(), LDBase->getBasePtr() }; | |||
8924 | SDValue ResNode = DAG.getMemIntrinsicNode( | |||
8925 | X86ISD::VZEXT_LOAD, DL, Tys, Ops, VecSVT, LDBase->getPointerInfo(), | |||
8926 | LDBase->getOriginalAlign(), MachineMemOperand::MOLoad); | |||
8927 | for (auto *LD : Loads) | |||
8928 | if (LD) | |||
8929 | DAG.makeEquivalentMemoryOrdering(LD, ResNode); | |||
8930 | return DAG.getBitcast(VT, ResNode); | |||
8931 | } | |||
8932 | } | |||
8933 | ||||
8934 | // BROADCAST - match the smallest possible repetition pattern, load that | |||
8935 | // scalar/subvector element and then broadcast to the entire vector. | |||
8936 | if (ZeroMask.isNullValue() && isPowerOf2_32(NumElems) && Subtarget.hasAVX() && | |||
8937 | (VT.is128BitVector() || VT.is256BitVector() || VT.is512BitVector())) { | |||
8938 | for (unsigned SubElems = 1; SubElems < NumElems; SubElems *= 2) { | |||
8939 | unsigned RepeatSize = SubElems * BaseSizeInBits; | |||
8940 | unsigned ScalarSize = std::min(RepeatSize, 64u); | |||
8941 | if (!Subtarget.hasAVX2() && ScalarSize < 32) | |||
8942 | continue; | |||
8943 | ||||
8944 | // Don't attempt a 1:N subvector broadcast - it should be caught by | |||
8945 | // combineConcatVectorOps, else will cause infinite loops. | |||
8946 | if (RepeatSize > ScalarSize && SubElems == 1) | |||
8947 | continue; | |||
8948 | ||||
8949 | bool Match = true; | |||
8950 | SmallVector<SDValue, 8> RepeatedLoads(SubElems, DAG.getUNDEF(EltBaseVT)); | |||
8951 | for (unsigned i = 0; i != NumElems && Match; ++i) { | |||
8952 | if (!LoadMask[i]) | |||
8953 | continue; | |||
8954 | SDValue Elt = peekThroughBitcasts(Elts[i]); | |||
8955 | if (RepeatedLoads[i % SubElems].isUndef()) | |||
8956 | RepeatedLoads[i % SubElems] = Elt; | |||
8957 | else | |||
8958 | Match &= (RepeatedLoads[i % SubElems] == Elt); | |||
8959 | } | |||
8960 | ||||
8961 | // We must have loads at both ends of the repetition. | |||
8962 | Match &= !RepeatedLoads.front().isUndef(); | |||
8963 | Match &= !RepeatedLoads.back().isUndef(); | |||
8964 | if (!Match) | |||
8965 | continue; | |||
8966 | ||||
8967 | EVT RepeatVT = | |||
8968 | VT.isInteger() && (RepeatSize != 64 || TLI.isTypeLegal(MVT::i64)) | |||
8969 | ? EVT::getIntegerVT(*DAG.getContext(), ScalarSize) | |||
8970 | : EVT::getFloatingPointVT(ScalarSize); | |||
8971 | if (RepeatSize > ScalarSize) | |||
8972 | RepeatVT = EVT::getVectorVT(*DAG.getContext(), RepeatVT, | |||
8973 | RepeatSize / ScalarSize); | |||
8974 | EVT BroadcastVT = | |||
8975 | EVT::getVectorVT(*DAG.getContext(), RepeatVT.getScalarType(), | |||
8976 | VT.getSizeInBits() / ScalarSize); | |||
8977 | if (TLI.isTypeLegal(BroadcastVT)) { | |||
8978 | if (SDValue RepeatLoad = EltsFromConsecutiveLoads( | |||
8979 | RepeatVT, RepeatedLoads, DL, DAG, Subtarget, IsAfterLegalize)) { | |||
8980 | SDValue Broadcast = RepeatLoad; | |||
8981 | if (RepeatSize > ScalarSize) { | |||
8982 | while (Broadcast.getValueSizeInBits() < VT.getSizeInBits()) | |||
8983 | Broadcast = concatSubVectors(Broadcast, Broadcast, DAG, DL); | |||
8984 | } else { | |||
8985 | if (!Subtarget.hasAVX2() && | |||
8986 | !MayFoldLoadIntoBroadcastFromMem( | |||
8987 | RepeatLoad, RepeatVT.getScalarType().getSimpleVT(), | |||
8988 | /*AssumeSingleUse=*/true)) | |||
8989 | return SDValue(); | |||
8990 | Broadcast = | |||
8991 | DAG.getNode(X86ISD::VBROADCAST, DL, BroadcastVT, RepeatLoad); | |||
8992 | } | |||
8993 | return DAG.getBitcast(VT, Broadcast); | |||
8994 | } | |||
8995 | } | |||
8996 | } | |||
8997 | } | |||
8998 | ||||
8999 | return SDValue(); | |||
9000 | } | |||
9001 | ||||
9002 | // Combine a vector ops (shuffles etc.) that is equal to build_vector load1, | |||
9003 | // load2, load3, load4, <0, 1, 2, 3> into a vector load if the load addresses | |||
9004 | // are consecutive, non-overlapping, and in the right order. | |||
9005 | static SDValue combineToConsecutiveLoads(EVT VT, SDValue Op, const SDLoc &DL, | |||
9006 | SelectionDAG &DAG, | |||
9007 | const X86Subtarget &Subtarget, | |||
9008 | bool IsAfterLegalize) { | |||
9009 | SmallVector<SDValue, 64> Elts; | |||
9010 | for (unsigned i = 0, e = VT.getVectorNumElements(); i != e; ++i) { | |||
9011 | if (SDValue Elt = getShuffleScalarElt(Op, i, DAG, 0)) { | |||
9012 | Elts.push_back(Elt); | |||
9013 | continue; | |||
9014 | } | |||
9015 | return SDValue(); | |||
9016 | } | |||
9017 | assert(Elts.size() == VT.getVectorNumElements())(static_cast <bool> (Elts.size() == VT.getVectorNumElements ()) ? void (0) : __assert_fail ("Elts.size() == VT.getVectorNumElements()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 9017, __extension__ __PRETTY_FUNCTION__)); | |||
9018 | return EltsFromConsecutiveLoads(VT, Elts, DL, DAG, Subtarget, | |||
9019 | IsAfterLegalize); | |||
9020 | } | |||
9021 | ||||
9022 | static Constant *getConstantVector(MVT VT, const APInt &SplatValue, | |||
9023 | unsigned SplatBitSize, LLVMContext &C) { | |||
9024 | unsigned ScalarSize = VT.getScalarSizeInBits(); | |||
9025 | unsigned NumElm = SplatBitSize / ScalarSize; | |||
9026 | ||||
9027 | SmallVector<Constant *, 32> ConstantVec; | |||
9028 | for (unsigned i = 0; i < NumElm; i++) { | |||
9029 | APInt Val = SplatValue.extractBits(ScalarSize, ScalarSize * i); | |||
9030 | Constant *Const; | |||
9031 | if (VT.isFloatingPoint()) { | |||
9032 | if (ScalarSize == 16) { | |||
9033 | Const = ConstantFP::get(C, APFloat(APFloat::IEEEhalf(), Val)); | |||
9034 | } else if (ScalarSize == 32) { | |||
9035 | Const = ConstantFP::get(C, APFloat(APFloat::IEEEsingle(), Val)); | |||
9036 | } else { | |||
9037 | assert(ScalarSize == 64 && "Unsupported floating point scalar size")(static_cast <bool> (ScalarSize == 64 && "Unsupported floating point scalar size" ) ? void (0) : __assert_fail ("ScalarSize == 64 && \"Unsupported floating point scalar size\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 9037, __extension__ __PRETTY_FUNCTION__)); | |||
9038 | Const = ConstantFP::get(C, APFloat(APFloat::IEEEdouble(), Val)); | |||
9039 | } | |||
9040 | } else | |||
9041 | Const = Constant::getIntegerValue(Type::getIntNTy(C, ScalarSize), Val); | |||
9042 | ConstantVec.push_back(Const); | |||
9043 | } | |||
9044 | return ConstantVector::get(ArrayRef<Constant *>(ConstantVec)); | |||
9045 | } | |||
9046 | ||||
9047 | static bool isFoldableUseOfShuffle(SDNode *N) { | |||
9048 | for (auto *U : N->uses()) { | |||
9049 | unsigned Opc = U->getOpcode(); | |||
9050 | // VPERMV/VPERMV3 shuffles can never fold their index operands. | |||
9051 | if (Opc == X86ISD::VPERMV && U->getOperand(0).getNode() == N) | |||
9052 | return false; | |||
9053 | if (Opc == X86ISD::VPERMV3 && U->getOperand(1).getNode() == N) | |||
9054 | return false; | |||
9055 | if (isTargetShuffle(Opc)) | |||
9056 | return true; | |||
9057 | if (Opc == ISD::BITCAST) // Ignore bitcasts | |||
9058 | return isFoldableUseOfShuffle(U); | |||
9059 | if (N->hasOneUse()) | |||
9060 | return true; | |||
9061 | } | |||
9062 | return false; | |||
9063 | } | |||
9064 | ||||
9065 | /// Attempt to use the vbroadcast instruction to generate a splat value | |||
9066 | /// from a splat BUILD_VECTOR which uses: | |||
9067 | /// a. A single scalar load, or a constant. | |||
9068 | /// b. Repeated pattern of constants (e.g. <0,1,0,1> or <0,1,2,3,0,1,2,3>). | |||
9069 | /// | |||
9070 | /// The VBROADCAST node is returned when a pattern is found, | |||
9071 | /// or SDValue() otherwise. | |||
9072 | static SDValue lowerBuildVectorAsBroadcast(BuildVectorSDNode *BVOp, | |||
9073 | const X86Subtarget &Subtarget, | |||
9074 | SelectionDAG &DAG) { | |||
9075 | // VBROADCAST requires AVX. | |||
9076 | // TODO: Splats could be generated for non-AVX CPUs using SSE | |||
9077 | // instructions, but there's less potential gain for only 128-bit vectors. | |||
9078 | if (!Subtarget.hasAVX()) | |||
9079 | return SDValue(); | |||
9080 | ||||
9081 | MVT VT = BVOp->getSimpleValueType(0); | |||
9082 | unsigned NumElts = VT.getVectorNumElements(); | |||
9083 | SDLoc dl(BVOp); | |||
9084 | ||||
9085 | assert((VT.is128BitVector() || VT.is256BitVector() || VT.is512BitVector()) &&(static_cast <bool> ((VT.is128BitVector() || VT.is256BitVector () || VT.is512BitVector()) && "Unsupported vector type for broadcast." ) ? void (0) : __assert_fail ("(VT.is128BitVector() || VT.is256BitVector() || VT.is512BitVector()) && \"Unsupported vector type for broadcast.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 9086, __extension__ __PRETTY_FUNCTION__)) | |||
9086 | "Unsupported vector type for broadcast.")(static_cast <bool> ((VT.is128BitVector() || VT.is256BitVector () || VT.is512BitVector()) && "Unsupported vector type for broadcast." ) ? void (0) : __assert_fail ("(VT.is128BitVector() || VT.is256BitVector() || VT.is512BitVector()) && \"Unsupported vector type for broadcast.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 9086, __extension__ __PRETTY_FUNCTION__)); | |||
9087 | ||||
9088 | // See if the build vector is a repeating sequence of scalars (inc. splat). | |||
9089 | SDValue Ld; | |||
9090 | BitVector UndefElements; | |||
9091 | SmallVector<SDValue, 16> Sequence; | |||
9092 | if (BVOp->getRepeatedSequence(Sequence, &UndefElements)) { | |||
9093 | assert((NumElts % Sequence.size()) == 0 && "Sequence doesn't fit.")(static_cast <bool> ((NumElts % Sequence.size()) == 0 && "Sequence doesn't fit.") ? void (0) : __assert_fail ("(NumElts % Sequence.size()) == 0 && \"Sequence doesn't fit.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 9093, __extension__ __PRETTY_FUNCTION__)); | |||
9094 | if (Sequence.size() == 1) | |||
9095 | Ld = Sequence[0]; | |||
9096 | } | |||
9097 | ||||
9098 | // Attempt to use VBROADCASTM | |||
9099 | // From this pattern: | |||
9100 | // a. t0 = (zext_i64 (bitcast_i8 v2i1 X)) | |||
9101 | // b. t1 = (build_vector t0 t0) | |||
9102 | // | |||
9103 | // Create (VBROADCASTM v2i1 X) | |||
9104 | if (!Sequence.empty() && Subtarget.hasCDI()) { | |||
9105 | // If not a splat, are the upper sequence values zeroable? | |||
9106 | unsigned SeqLen = Sequence.size(); | |||
9107 | bool UpperZeroOrUndef = | |||
9108 | SeqLen == 1 || | |||
9109 | llvm::all_of(makeArrayRef(Sequence).drop_front(), [](SDValue V) { | |||
9110 | return !V || V.isUndef() || isNullConstant(V); | |||
9111 | }); | |||
9112 | SDValue Op0 = Sequence[0]; | |||
9113 | if (UpperZeroOrUndef && ((Op0.getOpcode() == ISD::BITCAST) || | |||
9114 | (Op0.getOpcode() == ISD::ZERO_EXTEND && | |||
9115 | Op0.getOperand(0).getOpcode() == ISD::BITCAST))) { | |||
9116 | SDValue BOperand = Op0.getOpcode() == ISD::BITCAST | |||
9117 | ? Op0.getOperand(0) | |||
9118 | : Op0.getOperand(0).getOperand(0); | |||
9119 | MVT MaskVT = BOperand.getSimpleValueType(); | |||
9120 | MVT EltType = MVT::getIntegerVT(VT.getScalarSizeInBits() * SeqLen); | |||
9121 | if ((EltType == MVT::i64 && MaskVT == MVT::v8i1) || // for broadcastmb2q | |||
9122 | (EltType == MVT::i32 && MaskVT == MVT::v16i1)) { // for broadcastmw2d | |||
9123 | MVT BcstVT = MVT::getVectorVT(EltType, NumElts / SeqLen); | |||
9124 | if (!VT.is512BitVector() && !Subtarget.hasVLX()) { | |||
9125 | unsigned Scale = 512 / VT.getSizeInBits(); | |||
9126 | BcstVT = MVT::getVectorVT(EltType, Scale * (NumElts / SeqLen)); | |||
9127 | } | |||
9128 | SDValue Bcst = DAG.getNode(X86ISD::VBROADCASTM, dl, BcstVT, BOperand); | |||
9129 | if (BcstVT.getSizeInBits() != VT.getSizeInBits()) | |||
9130 | Bcst = extractSubVector(Bcst, 0, DAG, dl, VT.getSizeInBits()); | |||
9131 | return DAG.getBitcast(VT, Bcst); | |||
9132 | } | |||
9133 | } | |||
9134 | } | |||
9135 | ||||
9136 | unsigned NumUndefElts = UndefElements.count(); | |||
9137 | if (!Ld || (NumElts - NumUndefElts) <= 1) { | |||
9138 | APInt SplatValue, Undef; | |||
9139 | unsigned SplatBitSize; | |||
9140 | bool HasUndef; | |||
9141 | // Check if this is a repeated constant pattern suitable for broadcasting. | |||
9142 | if (BVOp->isConstantSplat(SplatValue, Undef, SplatBitSize, HasUndef) && | |||
9143 | SplatBitSize > VT.getScalarSizeInBits() && | |||
9144 | SplatBitSize < VT.getSizeInBits()) { | |||
9145 | // Avoid replacing with broadcast when it's a use of a shuffle | |||
9146 | // instruction to preserve the present custom lowering of shuffles. | |||
9147 | if (isFoldableUseOfShuffle(BVOp)) | |||
9148 | return SDValue(); | |||
9149 | // replace BUILD_VECTOR with broadcast of the repeated constants. | |||
9150 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
9151 | LLVMContext *Ctx = DAG.getContext(); | |||
9152 | MVT PVT = TLI.getPointerTy(DAG.getDataLayout()); | |||
9153 | if (Subtarget.hasAVX()) { | |||
9154 | if (SplatBitSize == 32 || SplatBitSize == 64 || | |||
9155 | (SplatBitSize < 32 && Subtarget.hasAVX2())) { | |||
9156 | // Splatted value can fit in one INTEGER constant in constant pool. | |||
9157 | // Load the constant and broadcast it. | |||
9158 | MVT CVT = MVT::getIntegerVT(SplatBitSize); | |||
9159 | Type *ScalarTy = Type::getIntNTy(*Ctx, SplatBitSize); | |||
9160 | Constant *C = Constant::getIntegerValue(ScalarTy, SplatValue); | |||
9161 | SDValue CP = DAG.getConstantPool(C, PVT); | |||
9162 | unsigned Repeat = VT.getSizeInBits() / SplatBitSize; | |||
9163 | ||||
9164 | Align Alignment = cast<ConstantPoolSDNode>(CP)->getAlign(); | |||
9165 | SDVTList Tys = | |||
9166 | DAG.getVTList(MVT::getVectorVT(CVT, Repeat), MVT::Other); | |||
9167 | SDValue Ops[] = {DAG.getEntryNode(), CP}; | |||
9168 | MachinePointerInfo MPI = | |||
9169 | MachinePointerInfo::getConstantPool(DAG.getMachineFunction()); | |||
9170 | SDValue Brdcst = DAG.getMemIntrinsicNode( | |||
9171 | X86ISD::VBROADCAST_LOAD, dl, Tys, Ops, CVT, MPI, Alignment, | |||
9172 | MachineMemOperand::MOLoad); | |||
9173 | return DAG.getBitcast(VT, Brdcst); | |||
9174 | } | |||
9175 | if (SplatBitSize > 64) { | |||
9176 | // Load the vector of constants and broadcast it. | |||
9177 | Constant *VecC = getConstantVector(VT, SplatValue, SplatBitSize, | |||
9178 | *Ctx); | |||
9179 | SDValue VCP = DAG.getConstantPool(VecC, PVT); | |||
9180 | unsigned NumElm = SplatBitSize / VT.getScalarSizeInBits(); | |||
9181 | MVT VVT = MVT::getVectorVT(VT.getScalarType(), NumElm); | |||
9182 | Align Alignment = cast<ConstantPoolSDNode>(VCP)->getAlign(); | |||
9183 | SDVTList Tys = DAG.getVTList(VT, MVT::Other); | |||
9184 | SDValue Ops[] = {DAG.getEntryNode(), VCP}; | |||
9185 | MachinePointerInfo MPI = | |||
9186 | MachinePointerInfo::getConstantPool(DAG.getMachineFunction()); | |||
9187 | return DAG.getMemIntrinsicNode( | |||
9188 | X86ISD::SUBV_BROADCAST_LOAD, dl, Tys, Ops, VVT, MPI, Alignment, | |||
9189 | MachineMemOperand::MOLoad); | |||
9190 | } | |||
9191 | } | |||
9192 | } | |||
9193 | ||||
9194 | // If we are moving a scalar into a vector (Ld must be set and all elements | |||
9195 | // but 1 are undef) and that operation is not obviously supported by | |||
9196 | // vmovd/vmovq/vmovss/vmovsd, then keep trying to form a broadcast. | |||
9197 | // That's better than general shuffling and may eliminate a load to GPR and | |||
9198 | // move from scalar to vector register. | |||
9199 | if (!Ld || NumElts - NumUndefElts != 1) | |||
9200 | return SDValue(); | |||
9201 | unsigned ScalarSize = Ld.getValueSizeInBits(); | |||
9202 | if (!(UndefElements[0] || (ScalarSize != 32 && ScalarSize != 64))) | |||
9203 | return SDValue(); | |||
9204 | } | |||
9205 | ||||
9206 | bool ConstSplatVal = | |||
9207 | (Ld.getOpcode() == ISD::Constant || Ld.getOpcode() == ISD::ConstantFP); | |||
9208 | bool IsLoad = ISD::isNormalLoad(Ld.getNode()); | |||
9209 | ||||
9210 | // TODO: Handle broadcasts of non-constant sequences. | |||
9211 | ||||
9212 | // Make sure that all of the users of a non-constant load are from the | |||
9213 | // BUILD_VECTOR node. | |||
9214 | // FIXME: Is the use count needed for non-constant, non-load case? | |||
9215 | if (!ConstSplatVal && !IsLoad && !BVOp->isOnlyUserOf(Ld.getNode())) | |||
9216 | return SDValue(); | |||
9217 | ||||
9218 | unsigned ScalarSize = Ld.getValueSizeInBits(); | |||
9219 | bool IsGE256 = (VT.getSizeInBits() >= 256); | |||
9220 | ||||
9221 | // When optimizing for size, generate up to 5 extra bytes for a broadcast | |||
9222 | // instruction to save 8 or more bytes of constant pool data. | |||
9223 | // TODO: If multiple splats are generated to load the same constant, | |||
9224 | // it may be detrimental to overall size. There needs to be a way to detect | |||
9225 | // that condition to know if this is truly a size win. | |||
9226 | bool OptForSize = DAG.shouldOptForSize(); | |||
9227 | ||||
9228 | // Handle broadcasting a single constant scalar from the constant pool | |||
9229 | // into a vector. | |||
9230 | // On Sandybridge (no AVX2), it is still better to load a constant vector | |||
9231 | // from the constant pool and not to broadcast it from a scalar. | |||
9232 | // But override that restriction when optimizing for size. | |||
9233 | // TODO: Check if splatting is recommended for other AVX-capable CPUs. | |||
9234 | if (ConstSplatVal && (Subtarget.hasAVX2() || OptForSize)) { | |||
9235 | EVT CVT = Ld.getValueType(); | |||
9236 | assert(!CVT.isVector() && "Must not broadcast a vector type")(static_cast <bool> (!CVT.isVector() && "Must not broadcast a vector type" ) ? void (0) : __assert_fail ("!CVT.isVector() && \"Must not broadcast a vector type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 9236, __extension__ __PRETTY_FUNCTION__)); | |||
9237 | ||||
9238 | // Splat f32, i32, v4f64, v4i64 in all cases with AVX2. | |||
9239 | // For size optimization, also splat v2f64 and v2i64, and for size opt | |||
9240 | // with AVX2, also splat i8 and i16. | |||
9241 | // With pattern matching, the VBROADCAST node may become a VMOVDDUP. | |||
9242 | if (ScalarSize == 32 || (IsGE256 && ScalarSize == 64) || | |||
9243 | (ScalarSize == 16 && Subtarget.hasFP16() && CVT.isFloatingPoint()) || | |||
9244 | (OptForSize && (ScalarSize == 64 || Subtarget.hasAVX2()))) { | |||
9245 | const Constant *C = nullptr; | |||
9246 | if (ConstantSDNode *CI = dyn_cast<ConstantSDNode>(Ld)) | |||
9247 | C = CI->getConstantIntValue(); | |||
9248 | else if (ConstantFPSDNode *CF = dyn_cast<ConstantFPSDNode>(Ld)) | |||
9249 | C = CF->getConstantFPValue(); | |||
9250 | ||||
9251 | assert(C && "Invalid constant type")(static_cast <bool> (C && "Invalid constant type" ) ? void (0) : __assert_fail ("C && \"Invalid constant type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 9251, __extension__ __PRETTY_FUNCTION__)); | |||
9252 | ||||
9253 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
9254 | SDValue CP = | |||
9255 | DAG.getConstantPool(C, TLI.getPointerTy(DAG.getDataLayout())); | |||
9256 | Align Alignment = cast<ConstantPoolSDNode>(CP)->getAlign(); | |||
9257 | ||||
9258 | SDVTList Tys = DAG.getVTList(VT, MVT::Other); | |||
9259 | SDValue Ops[] = {DAG.getEntryNode(), CP}; | |||
9260 | MachinePointerInfo MPI = | |||
9261 | MachinePointerInfo::getConstantPool(DAG.getMachineFunction()); | |||
9262 | return DAG.getMemIntrinsicNode(X86ISD::VBROADCAST_LOAD, dl, Tys, Ops, CVT, | |||
9263 | MPI, Alignment, MachineMemOperand::MOLoad); | |||
9264 | } | |||
9265 | } | |||
9266 | ||||
9267 | // Handle AVX2 in-register broadcasts. | |||
9268 | if (!IsLoad && Subtarget.hasInt256() && | |||
9269 | (ScalarSize == 32 || (IsGE256 && ScalarSize == 64))) | |||
9270 | return DAG.getNode(X86ISD::VBROADCAST, dl, VT, Ld); | |||
9271 | ||||
9272 | // The scalar source must be a normal load. | |||
9273 | if (!IsLoad) | |||
9274 | return SDValue(); | |||
9275 | ||||
9276 | // Make sure the non-chain result is only used by this build vector. | |||
9277 | if (!Ld->hasNUsesOfValue(NumElts - NumUndefElts, 0)) | |||
9278 | return SDValue(); | |||
9279 | ||||
9280 | if (ScalarSize == 32 || (IsGE256 && ScalarSize == 64) || | |||
9281 | (Subtarget.hasVLX() && ScalarSize == 64)) { | |||
9282 | auto *LN = cast<LoadSDNode>(Ld); | |||
9283 | SDVTList Tys = DAG.getVTList(VT, MVT::Other); | |||
9284 | SDValue Ops[] = {LN->getChain(), LN->getBasePtr()}; | |||
9285 | SDValue BCast = | |||
9286 | DAG.getMemIntrinsicNode(X86ISD::VBROADCAST_LOAD, dl, Tys, Ops, | |||
9287 | LN->getMemoryVT(), LN->getMemOperand()); | |||
9288 | DAG.ReplaceAllUsesOfValueWith(SDValue(LN, 1), BCast.getValue(1)); | |||
9289 | return BCast; | |||
9290 | } | |||
9291 | ||||
9292 | // The integer check is needed for the 64-bit into 128-bit so it doesn't match | |||
9293 | // double since there is no vbroadcastsd xmm | |||
9294 | if (Subtarget.hasInt256() && Ld.getValueType().isInteger() && | |||
9295 | (ScalarSize == 8 || ScalarSize == 16 || ScalarSize == 64)) { | |||
9296 | auto *LN = cast<LoadSDNode>(Ld); | |||
9297 | SDVTList Tys = DAG.getVTList(VT, MVT::Other); | |||
9298 | SDValue Ops[] = {LN->getChain(), LN->getBasePtr()}; | |||
9299 | SDValue BCast = | |||
9300 | DAG.getMemIntrinsicNode(X86ISD::VBROADCAST_LOAD, dl, Tys, Ops, | |||
9301 | LN->getMemoryVT(), LN->getMemOperand()); | |||
9302 | DAG.ReplaceAllUsesOfValueWith(SDValue(LN, 1), BCast.getValue(1)); | |||
9303 | return BCast; | |||
9304 | } | |||
9305 | ||||
9306 | if (ScalarSize == 16 && Subtarget.hasFP16() && IsGE256) | |||
9307 | return DAG.getNode(X86ISD::VBROADCAST, dl, VT, Ld); | |||
9308 | ||||
9309 | // Unsupported broadcast. | |||
9310 | return SDValue(); | |||
9311 | } | |||
9312 | ||||
9313 | /// For an EXTRACT_VECTOR_ELT with a constant index return the real | |||
9314 | /// underlying vector and index. | |||
9315 | /// | |||
9316 | /// Modifies \p ExtractedFromVec to the real vector and returns the real | |||
9317 | /// index. | |||
9318 | static int getUnderlyingExtractedFromVec(SDValue &ExtractedFromVec, | |||
9319 | SDValue ExtIdx) { | |||
9320 | int Idx = cast<ConstantSDNode>(ExtIdx)->getZExtValue(); | |||
9321 | if (!isa<ShuffleVectorSDNode>(ExtractedFromVec)) | |||
9322 | return Idx; | |||
9323 | ||||
9324 | // For 256-bit vectors, LowerEXTRACT_VECTOR_ELT_SSE4 may have already | |||
9325 | // lowered this: | |||
9326 | // (extract_vector_elt (v8f32 %1), Constant<6>) | |||
9327 | // to: | |||
9328 | // (extract_vector_elt (vector_shuffle<2,u,u,u> | |||
9329 | // (extract_subvector (v8f32 %0), Constant<4>), | |||
9330 | // undef) | |||
9331 | // Constant<0>) | |||
9332 | // In this case the vector is the extract_subvector expression and the index | |||
9333 | // is 2, as specified by the shuffle. | |||
9334 | ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(ExtractedFromVec); | |||
9335 | SDValue ShuffleVec = SVOp->getOperand(0); | |||
9336 | MVT ShuffleVecVT = ShuffleVec.getSimpleValueType(); | |||
9337 | assert(ShuffleVecVT.getVectorElementType() ==(static_cast <bool> (ShuffleVecVT.getVectorElementType( ) == ExtractedFromVec.getSimpleValueType().getVectorElementType ()) ? void (0) : __assert_fail ("ShuffleVecVT.getVectorElementType() == ExtractedFromVec.getSimpleValueType().getVectorElementType()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 9338, __extension__ __PRETTY_FUNCTION__)) | |||
9338 | ExtractedFromVec.getSimpleValueType().getVectorElementType())(static_cast <bool> (ShuffleVecVT.getVectorElementType( ) == ExtractedFromVec.getSimpleValueType().getVectorElementType ()) ? void (0) : __assert_fail ("ShuffleVecVT.getVectorElementType() == ExtractedFromVec.getSimpleValueType().getVectorElementType()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 9338, __extension__ __PRETTY_FUNCTION__)); | |||
9339 | ||||
9340 | int ShuffleIdx = SVOp->getMaskElt(Idx); | |||
9341 | if (isUndefOrInRange(ShuffleIdx, 0, ShuffleVecVT.getVectorNumElements())) { | |||
9342 | ExtractedFromVec = ShuffleVec; | |||
9343 | return ShuffleIdx; | |||
9344 | } | |||
9345 | return Idx; | |||
9346 | } | |||
9347 | ||||
9348 | static SDValue buildFromShuffleMostly(SDValue Op, SelectionDAG &DAG) { | |||
9349 | MVT VT = Op.getSimpleValueType(); | |||
9350 | ||||
9351 | // Skip if insert_vec_elt is not supported. | |||
9352 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
9353 | if (!TLI.isOperationLegalOrCustom(ISD::INSERT_VECTOR_ELT, VT)) | |||
9354 | return SDValue(); | |||
9355 | ||||
9356 | SDLoc DL(Op); | |||
9357 | unsigned NumElems = Op.getNumOperands(); | |||
9358 | ||||
9359 | SDValue VecIn1; | |||
9360 | SDValue VecIn2; | |||
9361 | SmallVector<unsigned, 4> InsertIndices; | |||
9362 | SmallVector<int, 8> Mask(NumElems, -1); | |||
9363 | ||||
9364 | for (unsigned i = 0; i != NumElems; ++i) { | |||
9365 | unsigned Opc = Op.getOperand(i).getOpcode(); | |||
9366 | ||||
9367 | if (Opc == ISD::UNDEF) | |||
9368 | continue; | |||
9369 | ||||
9370 | if (Opc != ISD::EXTRACT_VECTOR_ELT) { | |||
9371 | // Quit if more than 1 elements need inserting. | |||
9372 | if (InsertIndices.size() > 1) | |||
9373 | return SDValue(); | |||
9374 | ||||
9375 | InsertIndices.push_back(i); | |||
9376 | continue; | |||
9377 | } | |||
9378 | ||||
9379 | SDValue ExtractedFromVec = Op.getOperand(i).getOperand(0); | |||
9380 | SDValue ExtIdx = Op.getOperand(i).getOperand(1); | |||
9381 | ||||
9382 | // Quit if non-constant index. | |||
9383 | if (!isa<ConstantSDNode>(ExtIdx)) | |||
9384 | return SDValue(); | |||
9385 | int Idx = getUnderlyingExtractedFromVec(ExtractedFromVec, ExtIdx); | |||
9386 | ||||
9387 | // Quit if extracted from vector of different type. | |||
9388 | if (ExtractedFromVec.getValueType() != VT) | |||
9389 | return SDValue(); | |||
9390 | ||||
9391 | if (!VecIn1.getNode()) | |||
9392 | VecIn1 = ExtractedFromVec; | |||
9393 | else if (VecIn1 != ExtractedFromVec) { | |||
9394 | if (!VecIn2.getNode()) | |||
9395 | VecIn2 = ExtractedFromVec; | |||
9396 | else if (VecIn2 != ExtractedFromVec) | |||
9397 | // Quit if more than 2 vectors to shuffle | |||
9398 | return SDValue(); | |||
9399 | } | |||
9400 | ||||
9401 | if (ExtractedFromVec == VecIn1) | |||
9402 | Mask[i] = Idx; | |||
9403 | else if (ExtractedFromVec == VecIn2) | |||
9404 | Mask[i] = Idx + NumElems; | |||
9405 | } | |||
9406 | ||||
9407 | if (!VecIn1.getNode()) | |||
9408 | return SDValue(); | |||
9409 | ||||
9410 | VecIn2 = VecIn2.getNode() ? VecIn2 : DAG.getUNDEF(VT); | |||
9411 | SDValue NV = DAG.getVectorShuffle(VT, DL, VecIn1, VecIn2, Mask); | |||
9412 | ||||
9413 | for (unsigned Idx : InsertIndices) | |||
9414 | NV = DAG.getNode(ISD::INSERT_VECTOR_ELT, DL, VT, NV, Op.getOperand(Idx), | |||
9415 | DAG.getIntPtrConstant(Idx, DL)); | |||
9416 | ||||
9417 | return NV; | |||
9418 | } | |||
9419 | ||||
9420 | // Lower BUILD_VECTOR operation for v8i1 and v16i1 types. | |||
9421 | static SDValue LowerBUILD_VECTORvXi1(SDValue Op, SelectionDAG &DAG, | |||
9422 | const X86Subtarget &Subtarget) { | |||
9423 | ||||
9424 | MVT VT = Op.getSimpleValueType(); | |||
9425 | assert((VT.getVectorElementType() == MVT::i1) &&(static_cast <bool> ((VT.getVectorElementType() == MVT:: i1) && "Unexpected type in LowerBUILD_VECTORvXi1!") ? void (0) : __assert_fail ("(VT.getVectorElementType() == MVT::i1) && \"Unexpected type in LowerBUILD_VECTORvXi1!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 9426, __extension__ __PRETTY_FUNCTION__)) | |||
9426 | "Unexpected type in LowerBUILD_VECTORvXi1!")(static_cast <bool> ((VT.getVectorElementType() == MVT:: i1) && "Unexpected type in LowerBUILD_VECTORvXi1!") ? void (0) : __assert_fail ("(VT.getVectorElementType() == MVT::i1) && \"Unexpected type in LowerBUILD_VECTORvXi1!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 9426, __extension__ __PRETTY_FUNCTION__)); | |||
9427 | ||||
9428 | SDLoc dl(Op); | |||
9429 | if (ISD::isBuildVectorAllZeros(Op.getNode()) || | |||
9430 | ISD::isBuildVectorAllOnes(Op.getNode())) | |||
9431 | return Op; | |||
9432 | ||||
9433 | uint64_t Immediate = 0; | |||
9434 | SmallVector<unsigned, 16> NonConstIdx; | |||
9435 | bool IsSplat = true; | |||
9436 | bool HasConstElts = false; | |||
9437 | int SplatIdx = -1; | |||
9438 | for (unsigned idx = 0, e = Op.getNumOperands(); idx < e; ++idx) { | |||
9439 | SDValue In = Op.getOperand(idx); | |||
9440 | if (In.isUndef()) | |||
9441 | continue; | |||
9442 | if (auto *InC = dyn_cast<ConstantSDNode>(In)) { | |||
9443 | Immediate |= (InC->getZExtValue() & 0x1) << idx; | |||
9444 | HasConstElts = true; | |||
9445 | } else { | |||
9446 | NonConstIdx.push_back(idx); | |||
9447 | } | |||
9448 | if (SplatIdx < 0) | |||
9449 | SplatIdx = idx; | |||
9450 | else if (In != Op.getOperand(SplatIdx)) | |||
9451 | IsSplat = false; | |||
9452 | } | |||
9453 | ||||
9454 | // for splat use " (select i1 splat_elt, all-ones, all-zeroes)" | |||
9455 | if (IsSplat) { | |||
9456 | // The build_vector allows the scalar element to be larger than the vector | |||
9457 | // element type. We need to mask it to use as a condition unless we know | |||
9458 | // the upper bits are zero. | |||
9459 | // FIXME: Use computeKnownBits instead of checking specific opcode? | |||
9460 | SDValue Cond = Op.getOperand(SplatIdx); | |||
9461 | assert(Cond.getValueType() == MVT::i8 && "Unexpected VT!")(static_cast <bool> (Cond.getValueType() == MVT::i8 && "Unexpected VT!") ? void (0) : __assert_fail ("Cond.getValueType() == MVT::i8 && \"Unexpected VT!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 9461, __extension__ __PRETTY_FUNCTION__)); | |||
9462 | if (Cond.getOpcode() != ISD::SETCC) | |||
9463 | Cond = DAG.getNode(ISD::AND, dl, MVT::i8, Cond, | |||
9464 | DAG.getConstant(1, dl, MVT::i8)); | |||
9465 | ||||
9466 | // Perform the select in the scalar domain so we can use cmov. | |||
9467 | if (VT == MVT::v64i1 && !Subtarget.is64Bit()) { | |||
9468 | SDValue Select = DAG.getSelect(dl, MVT::i32, Cond, | |||
9469 | DAG.getAllOnesConstant(dl, MVT::i32), | |||
9470 | DAG.getConstant(0, dl, MVT::i32)); | |||
9471 | Select = DAG.getBitcast(MVT::v32i1, Select); | |||
9472 | return DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v64i1, Select, Select); | |||
9473 | } else { | |||
9474 | MVT ImmVT = MVT::getIntegerVT(std::max((unsigned)VT.getSizeInBits(), 8U)); | |||
9475 | SDValue Select = DAG.getSelect(dl, ImmVT, Cond, | |||
9476 | DAG.getAllOnesConstant(dl, ImmVT), | |||
9477 | DAG.getConstant(0, dl, ImmVT)); | |||
9478 | MVT VecVT = VT.getSizeInBits() >= 8 ? VT : MVT::v8i1; | |||
9479 | Select = DAG.getBitcast(VecVT, Select); | |||
9480 | return DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT, Select, | |||
9481 | DAG.getIntPtrConstant(0, dl)); | |||
9482 | } | |||
9483 | } | |||
9484 | ||||
9485 | // insert elements one by one | |||
9486 | SDValue DstVec; | |||
9487 | if (HasConstElts) { | |||
9488 | if (VT == MVT::v64i1 && !Subtarget.is64Bit()) { | |||
9489 | SDValue ImmL = DAG.getConstant(Lo_32(Immediate), dl, MVT::i32); | |||
9490 | SDValue ImmH = DAG.getConstant(Hi_32(Immediate), dl, MVT::i32); | |||
9491 | ImmL = DAG.getBitcast(MVT::v32i1, ImmL); | |||
9492 | ImmH = DAG.getBitcast(MVT::v32i1, ImmH); | |||
9493 | DstVec = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v64i1, ImmL, ImmH); | |||
9494 | } else { | |||
9495 | MVT ImmVT = MVT::getIntegerVT(std::max((unsigned)VT.getSizeInBits(), 8U)); | |||
9496 | SDValue Imm = DAG.getConstant(Immediate, dl, ImmVT); | |||
9497 | MVT VecVT = VT.getSizeInBits() >= 8 ? VT : MVT::v8i1; | |||
9498 | DstVec = DAG.getBitcast(VecVT, Imm); | |||
9499 | DstVec = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT, DstVec, | |||
9500 | DAG.getIntPtrConstant(0, dl)); | |||
9501 | } | |||
9502 | } else | |||
9503 | DstVec = DAG.getUNDEF(VT); | |||
9504 | ||||
9505 | for (unsigned i = 0, e = NonConstIdx.size(); i != e; ++i) { | |||
9506 | unsigned InsertIdx = NonConstIdx[i]; | |||
9507 | DstVec = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VT, DstVec, | |||
9508 | Op.getOperand(InsertIdx), | |||
9509 | DAG.getIntPtrConstant(InsertIdx, dl)); | |||
9510 | } | |||
9511 | return DstVec; | |||
9512 | } | |||
9513 | ||||
9514 | LLVM_ATTRIBUTE_UNUSED__attribute__((__unused__)) static bool isHorizOp(unsigned Opcode) { | |||
9515 | switch (Opcode) { | |||
9516 | case X86ISD::PACKSS: | |||
9517 | case X86ISD::PACKUS: | |||
9518 | case X86ISD::FHADD: | |||
9519 | case X86ISD::FHSUB: | |||
9520 | case X86ISD::HADD: | |||
9521 | case X86ISD::HSUB: | |||
9522 | return true; | |||
9523 | } | |||
9524 | return false; | |||
9525 | } | |||
9526 | ||||
9527 | /// This is a helper function of LowerToHorizontalOp(). | |||
9528 | /// This function checks that the build_vector \p N in input implements a | |||
9529 | /// 128-bit partial horizontal operation on a 256-bit vector, but that operation | |||
9530 | /// may not match the layout of an x86 256-bit horizontal instruction. | |||
9531 | /// In other words, if this returns true, then some extraction/insertion will | |||
9532 | /// be required to produce a valid horizontal instruction. | |||
9533 | /// | |||
9534 | /// Parameter \p Opcode defines the kind of horizontal operation to match. | |||
9535 | /// For example, if \p Opcode is equal to ISD::ADD, then this function | |||
9536 | /// checks if \p N implements a horizontal arithmetic add; if instead \p Opcode | |||
9537 | /// is equal to ISD::SUB, then this function checks if this is a horizontal | |||
9538 | /// arithmetic sub. | |||
9539 | /// | |||
9540 | /// This function only analyzes elements of \p N whose indices are | |||
9541 | /// in range [BaseIdx, LastIdx). | |||
9542 | /// | |||
9543 | /// TODO: This function was originally used to match both real and fake partial | |||
9544 | /// horizontal operations, but the index-matching logic is incorrect for that. | |||
9545 | /// See the corrected implementation in isHopBuildVector(). Can we reduce this | |||
9546 | /// code because it is only used for partial h-op matching now? | |||
9547 | static bool isHorizontalBinOpPart(const BuildVectorSDNode *N, unsigned Opcode, | |||
9548 | SelectionDAG &DAG, | |||
9549 | unsigned BaseIdx, unsigned LastIdx, | |||
9550 | SDValue &V0, SDValue &V1) { | |||
9551 | EVT VT = N->getValueType(0); | |||
9552 | assert(VT.is256BitVector() && "Only use for matching partial 256-bit h-ops")(static_cast <bool> (VT.is256BitVector() && "Only use for matching partial 256-bit h-ops" ) ? void (0) : __assert_fail ("VT.is256BitVector() && \"Only use for matching partial 256-bit h-ops\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 9552, __extension__ __PRETTY_FUNCTION__)); | |||
9553 | assert(BaseIdx * 2 <= LastIdx && "Invalid Indices in input!")(static_cast <bool> (BaseIdx * 2 <= LastIdx && "Invalid Indices in input!") ? void (0) : __assert_fail ("BaseIdx * 2 <= LastIdx && \"Invalid Indices in input!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 9553, __extension__ __PRETTY_FUNCTION__)); | |||
9554 | assert(VT.isVector() && VT.getVectorNumElements() >= LastIdx &&(static_cast <bool> (VT.isVector() && VT.getVectorNumElements () >= LastIdx && "Invalid Vector in input!") ? void (0) : __assert_fail ("VT.isVector() && VT.getVectorNumElements() >= LastIdx && \"Invalid Vector in input!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 9555, __extension__ __PRETTY_FUNCTION__)) | |||
9555 | "Invalid Vector in input!")(static_cast <bool> (VT.isVector() && VT.getVectorNumElements () >= LastIdx && "Invalid Vector in input!") ? void (0) : __assert_fail ("VT.isVector() && VT.getVectorNumElements() >= LastIdx && \"Invalid Vector in input!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 9555, __extension__ __PRETTY_FUNCTION__)); | |||
9556 | ||||
9557 | bool IsCommutable = (Opcode == ISD::ADD || Opcode == ISD::FADD); | |||
9558 | bool CanFold = true; | |||
9559 | unsigned ExpectedVExtractIdx = BaseIdx; | |||
9560 | unsigned NumElts = LastIdx - BaseIdx; | |||
9561 | V0 = DAG.getUNDEF(VT); | |||
9562 | V1 = DAG.getUNDEF(VT); | |||
9563 | ||||
9564 | // Check if N implements a horizontal binop. | |||
9565 | for (unsigned i = 0, e = NumElts; i != e && CanFold; ++i) { | |||
9566 | SDValue Op = N->getOperand(i + BaseIdx); | |||
9567 | ||||
9568 | // Skip UNDEFs. | |||
9569 | if (Op->isUndef()) { | |||
9570 | // Update the expected vector extract index. | |||
9571 | if (i * 2 == NumElts) | |||
9572 | ExpectedVExtractIdx = BaseIdx; | |||
9573 | ExpectedVExtractIdx += 2; | |||
9574 | continue; | |||
9575 | } | |||
9576 | ||||
9577 | CanFold = Op->getOpcode() == Opcode && Op->hasOneUse(); | |||
9578 | ||||
9579 | if (!CanFold) | |||
9580 | break; | |||
9581 | ||||
9582 | SDValue Op0 = Op.getOperand(0); | |||
9583 | SDValue Op1 = Op.getOperand(1); | |||
9584 | ||||
9585 | // Try to match the following pattern: | |||
9586 | // (BINOP (extract_vector_elt A, I), (extract_vector_elt A, I+1)) | |||
9587 | CanFold = (Op0.getOpcode() == ISD::EXTRACT_VECTOR_ELT && | |||
9588 | Op1.getOpcode() == ISD::EXTRACT_VECTOR_ELT && | |||
9589 | Op0.getOperand(0) == Op1.getOperand(0) && | |||
9590 | isa<ConstantSDNode>(Op0.getOperand(1)) && | |||
9591 | isa<ConstantSDNode>(Op1.getOperand(1))); | |||
9592 | if (!CanFold) | |||
9593 | break; | |||
9594 | ||||
9595 | unsigned I0 = Op0.getConstantOperandVal(1); | |||
9596 | unsigned I1 = Op1.getConstantOperandVal(1); | |||
9597 | ||||
9598 | if (i * 2 < NumElts) { | |||
9599 | if (V0.isUndef()) { | |||
9600 | V0 = Op0.getOperand(0); | |||
9601 | if (V0.getValueType() != VT) | |||
9602 | return false; | |||
9603 | } | |||
9604 | } else { | |||
9605 | if (V1.isUndef()) { | |||
9606 | V1 = Op0.getOperand(0); | |||
9607 | if (V1.getValueType() != VT) | |||
9608 | return false; | |||
9609 | } | |||
9610 | if (i * 2 == NumElts) | |||
9611 | ExpectedVExtractIdx = BaseIdx; | |||
9612 | } | |||
9613 | ||||
9614 | SDValue Expected = (i * 2 < NumElts) ? V0 : V1; | |||
9615 | if (I0 == ExpectedVExtractIdx) | |||
9616 | CanFold = I1 == I0 + 1 && Op0.getOperand(0) == Expected; | |||
9617 | else if (IsCommutable && I1 == ExpectedVExtractIdx) { | |||
9618 | // Try to match the following dag sequence: | |||
9619 | // (BINOP (extract_vector_elt A, I+1), (extract_vector_elt A, I)) | |||
9620 | CanFold = I0 == I1 + 1 && Op1.getOperand(0) == Expected; | |||
9621 | } else | |||
9622 | CanFold = false; | |||
9623 | ||||
9624 | ExpectedVExtractIdx += 2; | |||
9625 | } | |||
9626 | ||||
9627 | return CanFold; | |||
9628 | } | |||
9629 | ||||
9630 | /// Emit a sequence of two 128-bit horizontal add/sub followed by | |||
9631 | /// a concat_vector. | |||
9632 | /// | |||
9633 | /// This is a helper function of LowerToHorizontalOp(). | |||
9634 | /// This function expects two 256-bit vectors called V0 and V1. | |||
9635 | /// At first, each vector is split into two separate 128-bit vectors. | |||
9636 | /// Then, the resulting 128-bit vectors are used to implement two | |||
9637 | /// horizontal binary operations. | |||
9638 | /// | |||
9639 | /// The kind of horizontal binary operation is defined by \p X86Opcode. | |||
9640 | /// | |||
9641 | /// \p Mode specifies how the 128-bit parts of V0 and V1 are passed in input to | |||
9642 | /// the two new horizontal binop. | |||
9643 | /// When Mode is set, the first horizontal binop dag node would take as input | |||
9644 | /// the lower 128-bit of V0 and the upper 128-bit of V0. The second | |||
9645 | /// horizontal binop dag node would take as input the lower 128-bit of V1 | |||
9646 | /// and the upper 128-bit of V1. | |||
9647 | /// Example: | |||
9648 | /// HADD V0_LO, V0_HI | |||
9649 | /// HADD V1_LO, V1_HI | |||
9650 | /// | |||
9651 | /// Otherwise, the first horizontal binop dag node takes as input the lower | |||
9652 | /// 128-bit of V0 and the lower 128-bit of V1, and the second horizontal binop | |||
9653 | /// dag node takes the upper 128-bit of V0 and the upper 128-bit of V1. | |||
9654 | /// Example: | |||
9655 | /// HADD V0_LO, V1_LO | |||
9656 | /// HADD V0_HI, V1_HI | |||
9657 | /// | |||
9658 | /// If \p isUndefLO is set, then the algorithm propagates UNDEF to the lower | |||
9659 | /// 128-bits of the result. If \p isUndefHI is set, then UNDEF is propagated to | |||
9660 | /// the upper 128-bits of the result. | |||
9661 | static SDValue ExpandHorizontalBinOp(const SDValue &V0, const SDValue &V1, | |||
9662 | const SDLoc &DL, SelectionDAG &DAG, | |||
9663 | unsigned X86Opcode, bool Mode, | |||
9664 | bool isUndefLO, bool isUndefHI) { | |||
9665 | MVT VT = V0.getSimpleValueType(); | |||
9666 | assert(VT.is256BitVector() && VT == V1.getSimpleValueType() &&(static_cast <bool> (VT.is256BitVector() && VT == V1.getSimpleValueType() && "Invalid nodes in input!" ) ? void (0) : __assert_fail ("VT.is256BitVector() && VT == V1.getSimpleValueType() && \"Invalid nodes in input!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 9667, __extension__ __PRETTY_FUNCTION__)) | |||
9667 | "Invalid nodes in input!")(static_cast <bool> (VT.is256BitVector() && VT == V1.getSimpleValueType() && "Invalid nodes in input!" ) ? void (0) : __assert_fail ("VT.is256BitVector() && VT == V1.getSimpleValueType() && \"Invalid nodes in input!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 9667, __extension__ __PRETTY_FUNCTION__)); | |||
9668 | ||||
9669 | unsigned NumElts = VT.getVectorNumElements(); | |||
9670 | SDValue V0_LO = extract128BitVector(V0, 0, DAG, DL); | |||
9671 | SDValue V0_HI = extract128BitVector(V0, NumElts/2, DAG, DL); | |||
9672 | SDValue V1_LO = extract128BitVector(V1, 0, DAG, DL); | |||
9673 | SDValue V1_HI = extract128BitVector(V1, NumElts/2, DAG, DL); | |||
9674 | MVT NewVT = V0_LO.getSimpleValueType(); | |||
9675 | ||||
9676 | SDValue LO = DAG.getUNDEF(NewVT); | |||
9677 | SDValue HI = DAG.getUNDEF(NewVT); | |||
9678 | ||||
9679 | if (Mode) { | |||
9680 | // Don't emit a horizontal binop if the result is expected to be UNDEF. | |||
9681 | if (!isUndefLO && !V0->isUndef()) | |||
9682 | LO = DAG.getNode(X86Opcode, DL, NewVT, V0_LO, V0_HI); | |||
9683 | if (!isUndefHI && !V1->isUndef()) | |||
9684 | HI = DAG.getNode(X86Opcode, DL, NewVT, V1_LO, V1_HI); | |||
9685 | } else { | |||
9686 | // Don't emit a horizontal binop if the result is expected to be UNDEF. | |||
9687 | if (!isUndefLO && (!V0_LO->isUndef() || !V1_LO->isUndef())) | |||
9688 | LO = DAG.getNode(X86Opcode, DL, NewVT, V0_LO, V1_LO); | |||
9689 | ||||
9690 | if (!isUndefHI && (!V0_HI->isUndef() || !V1_HI->isUndef())) | |||
9691 | HI = DAG.getNode(X86Opcode, DL, NewVT, V0_HI, V1_HI); | |||
9692 | } | |||
9693 | ||||
9694 | return DAG.getNode(ISD::CONCAT_VECTORS, DL, VT, LO, HI); | |||
9695 | } | |||
9696 | ||||
9697 | /// Returns true iff \p BV builds a vector with the result equivalent to | |||
9698 | /// the result of ADDSUB/SUBADD operation. | |||
9699 | /// If true is returned then the operands of ADDSUB = Opnd0 +- Opnd1 | |||
9700 | /// (SUBADD = Opnd0 -+ Opnd1) operation are written to the parameters | |||
9701 | /// \p Opnd0 and \p Opnd1. | |||
9702 | static bool isAddSubOrSubAdd(const BuildVectorSDNode *BV, | |||
9703 | const X86Subtarget &Subtarget, SelectionDAG &DAG, | |||
9704 | SDValue &Opnd0, SDValue &Opnd1, | |||
9705 | unsigned &NumExtracts, | |||
9706 | bool &IsSubAdd) { | |||
9707 | ||||
9708 | MVT VT = BV->getSimpleValueType(0); | |||
9709 | if (!Subtarget.hasSSE3() || !VT.isFloatingPoint()) | |||
9710 | return false; | |||
9711 | ||||
9712 | unsigned NumElts = VT.getVectorNumElements(); | |||
9713 | SDValue InVec0 = DAG.getUNDEF(VT); | |||
9714 | SDValue InVec1 = DAG.getUNDEF(VT); | |||
9715 | ||||
9716 | NumExtracts = 0; | |||
9717 | ||||
9718 | // Odd-numbered elements in the input build vector are obtained from | |||
9719 | // adding/subtracting two integer/float elements. | |||
9720 | // Even-numbered elements in the input build vector are obtained from | |||
9721 | // subtracting/adding two integer/float elements. | |||
9722 | unsigned Opc[2] = {0, 0}; | |||
9723 | for (unsigned i = 0, e = NumElts; i != e; ++i) { | |||
9724 | SDValue Op = BV->getOperand(i); | |||
9725 | ||||
9726 | // Skip 'undef' values. | |||
9727 | unsigned Opcode = Op.getOpcode(); | |||
9728 | if (Opcode == ISD::UNDEF) | |||
9729 | continue; | |||
9730 | ||||
9731 | // Early exit if we found an unexpected opcode. | |||
9732 | if (Opcode != ISD::FADD && Opcode != ISD::FSUB) | |||
9733 | return false; | |||
9734 | ||||
9735 | SDValue Op0 = Op.getOperand(0); | |||
9736 | SDValue Op1 = Op.getOperand(1); | |||
9737 | ||||
9738 | // Try to match the following pattern: | |||
9739 | // (BINOP (extract_vector_elt A, i), (extract_vector_elt B, i)) | |||
9740 | // Early exit if we cannot match that sequence. | |||
9741 | if (Op0.getOpcode() != ISD::EXTRACT_VECTOR_ELT || | |||
9742 | Op1.getOpcode() != ISD::EXTRACT_VECTOR_ELT || | |||
9743 | !isa<ConstantSDNode>(Op0.getOperand(1)) || | |||
9744 | Op0.getOperand(1) != Op1.getOperand(1)) | |||
9745 | return false; | |||
9746 | ||||
9747 | unsigned I0 = Op0.getConstantOperandVal(1); | |||
9748 | if (I0 != i) | |||
9749 | return false; | |||
9750 | ||||
9751 | // We found a valid add/sub node, make sure its the same opcode as previous | |||
9752 | // elements for this parity. | |||
9753 | if (Opc[i % 2] != 0 && Opc[i % 2] != Opcode) | |||
9754 | return false; | |||
9755 | Opc[i % 2] = Opcode; | |||
9756 | ||||
9757 | // Update InVec0 and InVec1. | |||
9758 | if (InVec0.isUndef()) { | |||
9759 | InVec0 = Op0.getOperand(0); | |||
9760 | if (InVec0.getSimpleValueType() != VT) | |||
9761 | return false; | |||
9762 | } | |||
9763 | if (InVec1.isUndef()) { | |||
9764 | InVec1 = Op1.getOperand(0); | |||
9765 | if (InVec1.getSimpleValueType() != VT) | |||
9766 | return false; | |||
9767 | } | |||
9768 | ||||
9769 | // Make sure that operands in input to each add/sub node always | |||
9770 | // come from a same pair of vectors. | |||
9771 | if (InVec0 != Op0.getOperand(0)) { | |||
9772 | if (Opcode == ISD::FSUB) | |||
9773 | return false; | |||
9774 | ||||
9775 | // FADD is commutable. Try to commute the operands | |||
9776 | // and then test again. | |||
9777 | std::swap(Op0, Op1); | |||
9778 | if (InVec0 != Op0.getOperand(0)) | |||
9779 | return false; | |||
9780 | } | |||
9781 | ||||
9782 | if (InVec1 != Op1.getOperand(0)) | |||
9783 | return false; | |||
9784 | ||||
9785 | // Increment the number of extractions done. | |||
9786 | ++NumExtracts; | |||
9787 | } | |||
9788 | ||||
9789 | // Ensure we have found an opcode for both parities and that they are | |||
9790 | // different. Don't try to fold this build_vector into an ADDSUB/SUBADD if the | |||
9791 | // inputs are undef. | |||
9792 | if (!Opc[0] || !Opc[1] || Opc[0] == Opc[1] || | |||
9793 | InVec0.isUndef() || InVec1.isUndef()) | |||
9794 | return false; | |||
9795 | ||||
9796 | IsSubAdd = Opc[0] == ISD::FADD; | |||
9797 | ||||
9798 | Opnd0 = InVec0; | |||
9799 | Opnd1 = InVec1; | |||
9800 | return true; | |||
9801 | } | |||
9802 | ||||
9803 | /// Returns true if is possible to fold MUL and an idiom that has already been | |||
9804 | /// recognized as ADDSUB/SUBADD(\p Opnd0, \p Opnd1) into | |||
9805 | /// FMADDSUB/FMSUBADD(x, y, \p Opnd1). If (and only if) true is returned, the | |||
9806 | /// operands of FMADDSUB/FMSUBADD are written to parameters \p Opnd0, \p Opnd1, \p Opnd2. | |||
9807 | /// | |||
9808 | /// Prior to calling this function it should be known that there is some | |||
9809 | /// SDNode that potentially can be replaced with an X86ISD::ADDSUB operation | |||
9810 | /// using \p Opnd0 and \p Opnd1 as operands. Also, this method is called | |||
9811 | /// before replacement of such SDNode with ADDSUB operation. Thus the number | |||
9812 | /// of \p Opnd0 uses is expected to be equal to 2. | |||
9813 | /// For example, this function may be called for the following IR: | |||
9814 | /// %AB = fmul fast <2 x double> %A, %B | |||
9815 | /// %Sub = fsub fast <2 x double> %AB, %C | |||
9816 | /// %Add = fadd fast <2 x double> %AB, %C | |||
9817 | /// %Addsub = shufflevector <2 x double> %Sub, <2 x double> %Add, | |||
9818 | /// <2 x i32> <i32 0, i32 3> | |||
9819 | /// There is a def for %Addsub here, which potentially can be replaced by | |||
9820 | /// X86ISD::ADDSUB operation: | |||
9821 | /// %Addsub = X86ISD::ADDSUB %AB, %C | |||
9822 | /// and such ADDSUB can further be replaced with FMADDSUB: | |||
9823 | /// %Addsub = FMADDSUB %A, %B, %C. | |||
9824 | /// | |||
9825 | /// The main reason why this method is called before the replacement of the | |||
9826 | /// recognized ADDSUB idiom with ADDSUB operation is that such replacement | |||
9827 | /// is illegal sometimes. E.g. 512-bit ADDSUB is not available, while 512-bit | |||
9828 | /// FMADDSUB is. | |||
9829 | static bool isFMAddSubOrFMSubAdd(const X86Subtarget &Subtarget, | |||
9830 | SelectionDAG &DAG, | |||
9831 | SDValue &Opnd0, SDValue &Opnd1, SDValue &Opnd2, | |||
9832 | unsigned ExpectedUses) { | |||
9833 | if (Opnd0.getOpcode() != ISD::FMUL || | |||
9834 | !Opnd0->hasNUsesOfValue(ExpectedUses, 0) || !Subtarget.hasAnyFMA()) | |||
9835 | return false; | |||
9836 | ||||
9837 | // FIXME: These checks must match the similar ones in | |||
9838 | // DAGCombiner::visitFADDForFMACombine. It would be good to have one | |||
9839 | // function that would answer if it is Ok to fuse MUL + ADD to FMADD | |||
9840 | // or MUL + ADDSUB to FMADDSUB. | |||
9841 | const TargetOptions &Options = DAG.getTarget().Options; | |||
9842 | bool AllowFusion = | |||
9843 | (Options.AllowFPOpFusion == FPOpFusion::Fast || Options.UnsafeFPMath); | |||
9844 | if (!AllowFusion) | |||
9845 | return false; | |||
9846 | ||||
9847 | Opnd2 = Opnd1; | |||
9848 | Opnd1 = Opnd0.getOperand(1); | |||
9849 | Opnd0 = Opnd0.getOperand(0); | |||
9850 | ||||
9851 | return true; | |||
9852 | } | |||
9853 | ||||
9854 | /// Try to fold a build_vector that performs an 'addsub' or 'fmaddsub' or | |||
9855 | /// 'fsubadd' operation accordingly to X86ISD::ADDSUB or X86ISD::FMADDSUB or | |||
9856 | /// X86ISD::FMSUBADD node. | |||
9857 | static SDValue lowerToAddSubOrFMAddSub(const BuildVectorSDNode *BV, | |||
9858 | const X86Subtarget &Subtarget, | |||
9859 | SelectionDAG &DAG) { | |||
9860 | SDValue Opnd0, Opnd1; | |||
9861 | unsigned NumExtracts; | |||
9862 | bool IsSubAdd; | |||
9863 | if (!isAddSubOrSubAdd(BV, Subtarget, DAG, Opnd0, Opnd1, NumExtracts, | |||
9864 | IsSubAdd)) | |||
9865 | return SDValue(); | |||
9866 | ||||
9867 | MVT VT = BV->getSimpleValueType(0); | |||
9868 | SDLoc DL(BV); | |||
9869 | ||||
9870 | // Try to generate X86ISD::FMADDSUB node here. | |||
9871 | SDValue Opnd2; | |||
9872 | if (isFMAddSubOrFMSubAdd(Subtarget, DAG, Opnd0, Opnd1, Opnd2, NumExtracts)) { | |||
9873 | unsigned Opc = IsSubAdd ? X86ISD::FMSUBADD : X86ISD::FMADDSUB; | |||
9874 | return DAG.getNode(Opc, DL, VT, Opnd0, Opnd1, Opnd2); | |||
9875 | } | |||
9876 | ||||
9877 | // We only support ADDSUB. | |||
9878 | if (IsSubAdd) | |||
9879 | return SDValue(); | |||
9880 | ||||
9881 | // Do not generate X86ISD::ADDSUB node for 512-bit types even though | |||
9882 | // the ADDSUB idiom has been successfully recognized. There are no known | |||
9883 | // X86 targets with 512-bit ADDSUB instructions! | |||
9884 | // 512-bit ADDSUB idiom recognition was needed only as part of FMADDSUB idiom | |||
9885 | // recognition. | |||
9886 | if (VT.is512BitVector()) | |||
9887 | return SDValue(); | |||
9888 | ||||
9889 | return DAG.getNode(X86ISD::ADDSUB, DL, VT, Opnd0, Opnd1); | |||
9890 | } | |||
9891 | ||||
9892 | static bool isHopBuildVector(const BuildVectorSDNode *BV, SelectionDAG &DAG, | |||
9893 | unsigned &HOpcode, SDValue &V0, SDValue &V1) { | |||
9894 | // Initialize outputs to known values. | |||
9895 | MVT VT = BV->getSimpleValueType(0); | |||
9896 | HOpcode = ISD::DELETED_NODE; | |||
9897 | V0 = DAG.getUNDEF(VT); | |||
9898 | V1 = DAG.getUNDEF(VT); | |||
9899 | ||||
9900 | // x86 256-bit horizontal ops are defined in a non-obvious way. Each 128-bit | |||
9901 | // half of the result is calculated independently from the 128-bit halves of | |||
9902 | // the inputs, so that makes the index-checking logic below more complicated. | |||
9903 | unsigned NumElts = VT.getVectorNumElements(); | |||
9904 | unsigned GenericOpcode = ISD::DELETED_NODE; | |||
9905 | unsigned Num128BitChunks = VT.is256BitVector() ? 2 : 1; | |||
9906 | unsigned NumEltsIn128Bits = NumElts / Num128BitChunks; | |||
9907 | unsigned NumEltsIn64Bits = NumEltsIn128Bits / 2; | |||
9908 | for (unsigned i = 0; i != Num128BitChunks; ++i) { | |||
9909 | for (unsigned j = 0; j != NumEltsIn128Bits; ++j) { | |||
9910 | // Ignore undef elements. | |||
9911 | SDValue Op = BV->getOperand(i * NumEltsIn128Bits + j); | |||
9912 | if (Op.isUndef()) | |||
9913 | continue; | |||
9914 | ||||
9915 | // If there's an opcode mismatch, we're done. | |||
9916 | if (HOpcode != ISD::DELETED_NODE && Op.getOpcode() != GenericOpcode) | |||
9917 | return false; | |||
9918 | ||||
9919 | // Initialize horizontal opcode. | |||
9920 | if (HOpcode == ISD::DELETED_NODE) { | |||
9921 | GenericOpcode = Op.getOpcode(); | |||
9922 | switch (GenericOpcode) { | |||
9923 | case ISD::ADD: HOpcode = X86ISD::HADD; break; | |||
9924 | case ISD::SUB: HOpcode = X86ISD::HSUB; break; | |||
9925 | case ISD::FADD: HOpcode = X86ISD::FHADD; break; | |||
9926 | case ISD::FSUB: HOpcode = X86ISD::FHSUB; break; | |||
9927 | default: return false; | |||
9928 | } | |||
9929 | } | |||
9930 | ||||
9931 | SDValue Op0 = Op.getOperand(0); | |||
9932 | SDValue Op1 = Op.getOperand(1); | |||
9933 | if (Op0.getOpcode() != ISD::EXTRACT_VECTOR_ELT || | |||
9934 | Op1.getOpcode() != ISD::EXTRACT_VECTOR_ELT || | |||
9935 | Op0.getOperand(0) != Op1.getOperand(0) || | |||
9936 | !isa<ConstantSDNode>(Op0.getOperand(1)) || | |||
9937 | !isa<ConstantSDNode>(Op1.getOperand(1)) || !Op.hasOneUse()) | |||
9938 | return false; | |||
9939 | ||||
9940 | // The source vector is chosen based on which 64-bit half of the | |||
9941 | // destination vector is being calculated. | |||
9942 | if (j < NumEltsIn64Bits) { | |||
9943 | if (V0.isUndef()) | |||
9944 | V0 = Op0.getOperand(0); | |||
9945 | } else { | |||
9946 | if (V1.isUndef()) | |||
9947 | V1 = Op0.getOperand(0); | |||
9948 | } | |||
9949 | ||||
9950 | SDValue SourceVec = (j < NumEltsIn64Bits) ? V0 : V1; | |||
9951 | if (SourceVec != Op0.getOperand(0)) | |||
9952 | return false; | |||
9953 | ||||
9954 | // op (extract_vector_elt A, I), (extract_vector_elt A, I+1) | |||
9955 | unsigned ExtIndex0 = Op0.getConstantOperandVal(1); | |||
9956 | unsigned ExtIndex1 = Op1.getConstantOperandVal(1); | |||
9957 | unsigned ExpectedIndex = i * NumEltsIn128Bits + | |||
9958 | (j % NumEltsIn64Bits) * 2; | |||
9959 | if (ExpectedIndex == ExtIndex0 && ExtIndex1 == ExtIndex0 + 1) | |||
9960 | continue; | |||
9961 | ||||
9962 | // If this is not a commutative op, this does not match. | |||
9963 | if (GenericOpcode != ISD::ADD && GenericOpcode != ISD::FADD) | |||
9964 | return false; | |||
9965 | ||||
9966 | // Addition is commutative, so try swapping the extract indexes. | |||
9967 | // op (extract_vector_elt A, I+1), (extract_vector_elt A, I) | |||
9968 | if (ExpectedIndex == ExtIndex1 && ExtIndex0 == ExtIndex1 + 1) | |||
9969 | continue; | |||
9970 | ||||
9971 | // Extract indexes do not match horizontal requirement. | |||
9972 | return false; | |||
9973 | } | |||
9974 | } | |||
9975 | // We matched. Opcode and operands are returned by reference as arguments. | |||
9976 | return true; | |||
9977 | } | |||
9978 | ||||
9979 | static SDValue getHopForBuildVector(const BuildVectorSDNode *BV, | |||
9980 | SelectionDAG &DAG, unsigned HOpcode, | |||
9981 | SDValue V0, SDValue V1) { | |||
9982 | // If either input vector is not the same size as the build vector, | |||
9983 | // extract/insert the low bits to the correct size. | |||
9984 | // This is free (examples: zmm --> xmm, xmm --> ymm). | |||
9985 | MVT VT = BV->getSimpleValueType(0); | |||
9986 | unsigned Width = VT.getSizeInBits(); | |||
9987 | if (V0.getValueSizeInBits() > Width) | |||
9988 | V0 = extractSubVector(V0, 0, DAG, SDLoc(BV), Width); | |||
9989 | else if (V0.getValueSizeInBits() < Width) | |||
9990 | V0 = insertSubVector(DAG.getUNDEF(VT), V0, 0, DAG, SDLoc(BV), Width); | |||
9991 | ||||
9992 | if (V1.getValueSizeInBits() > Width) | |||
9993 | V1 = extractSubVector(V1, 0, DAG, SDLoc(BV), Width); | |||
9994 | else if (V1.getValueSizeInBits() < Width) | |||
9995 | V1 = insertSubVector(DAG.getUNDEF(VT), V1, 0, DAG, SDLoc(BV), Width); | |||
9996 | ||||
9997 | unsigned NumElts = VT.getVectorNumElements(); | |||
9998 | APInt DemandedElts = APInt::getAllOnesValue(NumElts); | |||
9999 | for (unsigned i = 0; i != NumElts; ++i) | |||
10000 | if (BV->getOperand(i).isUndef()) | |||
10001 | DemandedElts.clearBit(i); | |||
10002 | ||||
10003 | // If we don't need the upper xmm, then perform as a xmm hop. | |||
10004 | unsigned HalfNumElts = NumElts / 2; | |||
10005 | if (VT.is256BitVector() && DemandedElts.lshr(HalfNumElts) == 0) { | |||
10006 | MVT HalfVT = VT.getHalfNumVectorElementsVT(); | |||
10007 | V0 = extractSubVector(V0, 0, DAG, SDLoc(BV), 128); | |||
10008 | V1 = extractSubVector(V1, 0, DAG, SDLoc(BV), 128); | |||
10009 | SDValue Half = DAG.getNode(HOpcode, SDLoc(BV), HalfVT, V0, V1); | |||
10010 | return insertSubVector(DAG.getUNDEF(VT), Half, 0, DAG, SDLoc(BV), 256); | |||
10011 | } | |||
10012 | ||||
10013 | return DAG.getNode(HOpcode, SDLoc(BV), VT, V0, V1); | |||
10014 | } | |||
10015 | ||||
10016 | /// Lower BUILD_VECTOR to a horizontal add/sub operation if possible. | |||
10017 | static SDValue LowerToHorizontalOp(const BuildVectorSDNode *BV, | |||
10018 | const X86Subtarget &Subtarget, | |||
10019 | SelectionDAG &DAG) { | |||
10020 | // We need at least 2 non-undef elements to make this worthwhile by default. | |||
10021 | unsigned NumNonUndefs = | |||
10022 | count_if(BV->op_values(), [](SDValue V) { return !V.isUndef(); }); | |||
10023 | if (NumNonUndefs < 2) | |||
10024 | return SDValue(); | |||
10025 | ||||
10026 | // There are 4 sets of horizontal math operations distinguished by type: | |||
10027 | // int/FP at 128-bit/256-bit. Each type was introduced with a different | |||
10028 | // subtarget feature. Try to match those "native" patterns first. | |||
10029 | MVT VT = BV->getSimpleValueType(0); | |||
10030 | if (((VT == MVT::v4f32 || VT == MVT::v2f64) && Subtarget.hasSSE3()) || | |||
10031 | ((VT == MVT::v8i16 || VT == MVT::v4i32) && Subtarget.hasSSSE3()) || | |||
10032 | ((VT == MVT::v8f32 || VT == MVT::v4f64) && Subtarget.hasAVX()) || | |||
10033 | ((VT == MVT::v16i16 || VT == MVT::v8i32) && Subtarget.hasAVX2())) { | |||
10034 | unsigned HOpcode; | |||
10035 | SDValue V0, V1; | |||
10036 | if (isHopBuildVector(BV, DAG, HOpcode, V0, V1)) | |||
10037 | return getHopForBuildVector(BV, DAG, HOpcode, V0, V1); | |||
10038 | } | |||
10039 | ||||
10040 | // Try harder to match 256-bit ops by using extract/concat. | |||
10041 | if (!Subtarget.hasAVX() || !VT.is256BitVector()) | |||
10042 | return SDValue(); | |||
10043 | ||||
10044 | // Count the number of UNDEF operands in the build_vector in input. | |||
10045 | unsigned NumElts = VT.getVectorNumElements(); | |||
10046 | unsigned Half = NumElts / 2; | |||
10047 | unsigned NumUndefsLO = 0; | |||
10048 | unsigned NumUndefsHI = 0; | |||
10049 | for (unsigned i = 0, e = Half; i != e; ++i) | |||
10050 | if (BV->getOperand(i)->isUndef()) | |||
10051 | NumUndefsLO++; | |||
10052 | ||||
10053 | for (unsigned i = Half, e = NumElts; i != e; ++i) | |||
10054 | if (BV->getOperand(i)->isUndef()) | |||
10055 | NumUndefsHI++; | |||
10056 | ||||
10057 | SDLoc DL(BV); | |||
10058 | SDValue InVec0, InVec1; | |||
10059 | if (VT == MVT::v8i32 || VT == MVT::v16i16) { | |||
10060 | SDValue InVec2, InVec3; | |||
10061 | unsigned X86Opcode; | |||
10062 | bool CanFold = true; | |||
10063 | ||||
10064 | if (isHorizontalBinOpPart(BV, ISD::ADD, DAG, 0, Half, InVec0, InVec1) && | |||
10065 | isHorizontalBinOpPart(BV, ISD::ADD, DAG, Half, NumElts, InVec2, | |||
10066 | InVec3) && | |||
10067 | ((InVec0.isUndef() || InVec2.isUndef()) || InVec0 == InVec2) && | |||
10068 | ((InVec1.isUndef() || InVec3.isUndef()) || InVec1 == InVec3)) | |||
10069 | X86Opcode = X86ISD::HADD; | |||
10070 | else if (isHorizontalBinOpPart(BV, ISD::SUB, DAG, 0, Half, InVec0, | |||
10071 | InVec1) && | |||
10072 | isHorizontalBinOpPart(BV, ISD::SUB, DAG, Half, NumElts, InVec2, | |||
10073 | InVec3) && | |||
10074 | ((InVec0.isUndef() || InVec2.isUndef()) || InVec0 == InVec2) && | |||
10075 | ((InVec1.isUndef() || InVec3.isUndef()) || InVec1 == InVec3)) | |||
10076 | X86Opcode = X86ISD::HSUB; | |||
10077 | else | |||
10078 | CanFold = false; | |||
10079 | ||||
10080 | if (CanFold) { | |||
10081 | // Do not try to expand this build_vector into a pair of horizontal | |||
10082 | // add/sub if we can emit a pair of scalar add/sub. | |||
10083 | if (NumUndefsLO + 1 == Half || NumUndefsHI + 1 == Half) | |||
10084 | return SDValue(); | |||
10085 | ||||
10086 | // Convert this build_vector into a pair of horizontal binops followed by | |||
10087 | // a concat vector. We must adjust the outputs from the partial horizontal | |||
10088 | // matching calls above to account for undefined vector halves. | |||
10089 | SDValue V0 = InVec0.isUndef() ? InVec2 : InVec0; | |||
10090 | SDValue V1 = InVec1.isUndef() ? InVec3 : InVec1; | |||
10091 | assert((!V0.isUndef() || !V1.isUndef()) && "Horizontal-op of undefs?")(static_cast <bool> ((!V0.isUndef() || !V1.isUndef()) && "Horizontal-op of undefs?") ? void (0) : __assert_fail ("(!V0.isUndef() || !V1.isUndef()) && \"Horizontal-op of undefs?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 10091, __extension__ __PRETTY_FUNCTION__)); | |||
10092 | bool isUndefLO = NumUndefsLO == Half; | |||
10093 | bool isUndefHI = NumUndefsHI == Half; | |||
10094 | return ExpandHorizontalBinOp(V0, V1, DL, DAG, X86Opcode, false, isUndefLO, | |||
10095 | isUndefHI); | |||
10096 | } | |||
10097 | } | |||
10098 | ||||
10099 | if (VT == MVT::v8f32 || VT == MVT::v4f64 || VT == MVT::v8i32 || | |||
10100 | VT == MVT::v16i16) { | |||
10101 | unsigned X86Opcode; | |||
10102 | if (isHorizontalBinOpPart(BV, ISD::ADD, DAG, 0, NumElts, InVec0, InVec1)) | |||
10103 | X86Opcode = X86ISD::HADD; | |||
10104 | else if (isHorizontalBinOpPart(BV, ISD::SUB, DAG, 0, NumElts, InVec0, | |||
10105 | InVec1)) | |||
10106 | X86Opcode = X86ISD::HSUB; | |||
10107 | else if (isHorizontalBinOpPart(BV, ISD::FADD, DAG, 0, NumElts, InVec0, | |||
10108 | InVec1)) | |||
10109 | X86Opcode = X86ISD::FHADD; | |||
10110 | else if (isHorizontalBinOpPart(BV, ISD::FSUB, DAG, 0, NumElts, InVec0, | |||
10111 | InVec1)) | |||
10112 | X86Opcode = X86ISD::FHSUB; | |||
10113 | else | |||
10114 | return SDValue(); | |||
10115 | ||||
10116 | // Don't try to expand this build_vector into a pair of horizontal add/sub | |||
10117 | // if we can simply emit a pair of scalar add/sub. | |||
10118 | if (NumUndefsLO + 1 == Half || NumUndefsHI + 1 == Half) | |||
10119 | return SDValue(); | |||
10120 | ||||
10121 | // Convert this build_vector into two horizontal add/sub followed by | |||
10122 | // a concat vector. | |||
10123 | bool isUndefLO = NumUndefsLO == Half; | |||
10124 | bool isUndefHI = NumUndefsHI == Half; | |||
10125 | return ExpandHorizontalBinOp(InVec0, InVec1, DL, DAG, X86Opcode, true, | |||
10126 | isUndefLO, isUndefHI); | |||
10127 | } | |||
10128 | ||||
10129 | return SDValue(); | |||
10130 | } | |||
10131 | ||||
10132 | static SDValue LowerShift(SDValue Op, const X86Subtarget &Subtarget, | |||
10133 | SelectionDAG &DAG); | |||
10134 | ||||
10135 | /// If a BUILD_VECTOR's source elements all apply the same bit operation and | |||
10136 | /// one of their operands is constant, lower to a pair of BUILD_VECTOR and | |||
10137 | /// just apply the bit to the vectors. | |||
10138 | /// NOTE: Its not in our interest to start make a general purpose vectorizer | |||
10139 | /// from this, but enough scalar bit operations are created from the later | |||
10140 | /// legalization + scalarization stages to need basic support. | |||
10141 | static SDValue lowerBuildVectorToBitOp(BuildVectorSDNode *Op, | |||
10142 | const X86Subtarget &Subtarget, | |||
10143 | SelectionDAG &DAG) { | |||
10144 | SDLoc DL(Op); | |||
10145 | MVT VT = Op->getSimpleValueType(0); | |||
10146 | unsigned NumElems = VT.getVectorNumElements(); | |||
10147 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
10148 | ||||
10149 | // Check that all elements have the same opcode. | |||
10150 | // TODO: Should we allow UNDEFS and if so how many? | |||
10151 | unsigned Opcode = Op->getOperand(0).getOpcode(); | |||
10152 | for (unsigned i = 1; i < NumElems; ++i) | |||
10153 | if (Opcode != Op->getOperand(i).getOpcode()) | |||
10154 | return SDValue(); | |||
10155 | ||||
10156 | // TODO: We may be able to add support for other Ops (ADD/SUB + shifts). | |||
10157 | bool IsShift = false; | |||
10158 | switch (Opcode) { | |||
10159 | default: | |||
10160 | return SDValue(); | |||
10161 | case ISD::SHL: | |||
10162 | case ISD::SRL: | |||
10163 | case ISD::SRA: | |||
10164 | IsShift = true; | |||
10165 | break; | |||
10166 | case ISD::AND: | |||
10167 | case ISD::XOR: | |||
10168 | case ISD::OR: | |||
10169 | // Don't do this if the buildvector is a splat - we'd replace one | |||
10170 | // constant with an entire vector. | |||
10171 | if (Op->getSplatValue()) | |||
10172 | return SDValue(); | |||
10173 | if (!TLI.isOperationLegalOrPromote(Opcode, VT)) | |||
10174 | return SDValue(); | |||
10175 | break; | |||
10176 | } | |||
10177 | ||||
10178 | SmallVector<SDValue, 4> LHSElts, RHSElts; | |||
10179 | for (SDValue Elt : Op->ops()) { | |||
10180 | SDValue LHS = Elt.getOperand(0); | |||
10181 | SDValue RHS = Elt.getOperand(1); | |||
10182 | ||||
10183 | // We expect the canonicalized RHS operand to be the constant. | |||
10184 | if (!isa<ConstantSDNode>(RHS)) | |||
10185 | return SDValue(); | |||
10186 | ||||
10187 | // Extend shift amounts. | |||
10188 | if (RHS.getValueSizeInBits() != VT.getScalarSizeInBits()) { | |||
10189 | if (!IsShift) | |||
10190 | return SDValue(); | |||
10191 | RHS = DAG.getZExtOrTrunc(RHS, DL, VT.getScalarType()); | |||
10192 | } | |||
10193 | ||||
10194 | LHSElts.push_back(LHS); | |||
10195 | RHSElts.push_back(RHS); | |||
10196 | } | |||
10197 | ||||
10198 | // Limit to shifts by uniform immediates. | |||
10199 | // TODO: Only accept vXi8/vXi64 special cases? | |||
10200 | // TODO: Permit non-uniform XOP/AVX2/MULLO cases? | |||
10201 | if (IsShift && any_of(RHSElts, [&](SDValue V) { return RHSElts[0] != V; })) | |||
10202 | return SDValue(); | |||
10203 | ||||
10204 | SDValue LHS = DAG.getBuildVector(VT, DL, LHSElts); | |||
10205 | SDValue RHS = DAG.getBuildVector(VT, DL, RHSElts); | |||
10206 | SDValue Res = DAG.getNode(Opcode, DL, VT, LHS, RHS); | |||
10207 | ||||
10208 | if (!IsShift) | |||
10209 | return Res; | |||
10210 | ||||
10211 | // Immediately lower the shift to ensure the constant build vector doesn't | |||
10212 | // get converted to a constant pool before the shift is lowered. | |||
10213 | return LowerShift(Res, Subtarget, DAG); | |||
10214 | } | |||
10215 | ||||
10216 | /// Create a vector constant without a load. SSE/AVX provide the bare minimum | |||
10217 | /// functionality to do this, so it's all zeros, all ones, or some derivation | |||
10218 | /// that is cheap to calculate. | |||
10219 | static SDValue materializeVectorConstant(SDValue Op, SelectionDAG &DAG, | |||
10220 | const X86Subtarget &Subtarget) { | |||
10221 | SDLoc DL(Op); | |||
10222 | MVT VT = Op.getSimpleValueType(); | |||
10223 | ||||
10224 | // Vectors containing all zeros can be matched by pxor and xorps. | |||
10225 | if (ISD::isBuildVectorAllZeros(Op.getNode())) | |||
10226 | return Op; | |||
10227 | ||||
10228 | // Vectors containing all ones can be matched by pcmpeqd on 128-bit width | |||
10229 | // vectors or broken into v4i32 operations on 256-bit vectors. AVX2 can use | |||
10230 | // vpcmpeqd on 256-bit vectors. | |||
10231 | if (Subtarget.hasSSE2() && ISD::isBuildVectorAllOnes(Op.getNode())) { | |||
10232 | if (VT == MVT::v4i32 || VT == MVT::v8i32 || VT == MVT::v16i32) | |||
10233 | return Op; | |||
10234 | ||||
10235 | return getOnesVector(VT, DAG, DL); | |||
10236 | } | |||
10237 | ||||
10238 | return SDValue(); | |||
10239 | } | |||
10240 | ||||
10241 | /// Look for opportunities to create a VPERMV/VPERMILPV/PSHUFB variable permute | |||
10242 | /// from a vector of source values and a vector of extraction indices. | |||
10243 | /// The vectors might be manipulated to match the type of the permute op. | |||
10244 | static SDValue createVariablePermute(MVT VT, SDValue SrcVec, SDValue IndicesVec, | |||
10245 | SDLoc &DL, SelectionDAG &DAG, | |||
10246 | const X86Subtarget &Subtarget) { | |||
10247 | MVT ShuffleVT = VT; | |||
10248 | EVT IndicesVT = EVT(VT).changeVectorElementTypeToInteger(); | |||
10249 | unsigned NumElts = VT.getVectorNumElements(); | |||
10250 | unsigned SizeInBits = VT.getSizeInBits(); | |||
10251 | ||||
10252 | // Adjust IndicesVec to match VT size. | |||
10253 | assert(IndicesVec.getValueType().getVectorNumElements() >= NumElts &&(static_cast <bool> (IndicesVec.getValueType().getVectorNumElements () >= NumElts && "Illegal variable permute mask size" ) ? void (0) : __assert_fail ("IndicesVec.getValueType().getVectorNumElements() >= NumElts && \"Illegal variable permute mask size\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 10254, __extension__ __PRETTY_FUNCTION__)) | |||
10254 | "Illegal variable permute mask size")(static_cast <bool> (IndicesVec.getValueType().getVectorNumElements () >= NumElts && "Illegal variable permute mask size" ) ? void (0) : __assert_fail ("IndicesVec.getValueType().getVectorNumElements() >= NumElts && \"Illegal variable permute mask size\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 10254, __extension__ __PRETTY_FUNCTION__)); | |||
10255 | if (IndicesVec.getValueType().getVectorNumElements() > NumElts) { | |||
10256 | // Narrow/widen the indices vector to the correct size. | |||
10257 | if (IndicesVec.getValueSizeInBits() > SizeInBits) | |||
10258 | IndicesVec = extractSubVector(IndicesVec, 0, DAG, SDLoc(IndicesVec), | |||
10259 | NumElts * VT.getScalarSizeInBits()); | |||
10260 | else if (IndicesVec.getValueSizeInBits() < SizeInBits) | |||
10261 | IndicesVec = widenSubVector(IndicesVec, false, Subtarget, DAG, | |||
10262 | SDLoc(IndicesVec), SizeInBits); | |||
10263 | // Zero-extend the index elements within the vector. | |||
10264 | if (IndicesVec.getValueType().getVectorNumElements() > NumElts) | |||
10265 | IndicesVec = DAG.getNode(ISD::ZERO_EXTEND_VECTOR_INREG, SDLoc(IndicesVec), | |||
10266 | IndicesVT, IndicesVec); | |||
10267 | } | |||
10268 | IndicesVec = DAG.getZExtOrTrunc(IndicesVec, SDLoc(IndicesVec), IndicesVT); | |||
10269 | ||||
10270 | // Handle SrcVec that don't match VT type. | |||
10271 | if (SrcVec.getValueSizeInBits() != SizeInBits) { | |||
10272 | if ((SrcVec.getValueSizeInBits() % SizeInBits) == 0) { | |||
10273 | // Handle larger SrcVec by treating it as a larger permute. | |||
10274 | unsigned Scale = SrcVec.getValueSizeInBits() / SizeInBits; | |||
10275 | VT = MVT::getVectorVT(VT.getScalarType(), Scale * NumElts); | |||
10276 | IndicesVT = EVT(VT).changeVectorElementTypeToInteger(); | |||
10277 | IndicesVec = widenSubVector(IndicesVT.getSimpleVT(), IndicesVec, false, | |||
10278 | Subtarget, DAG, SDLoc(IndicesVec)); | |||
10279 | SDValue NewSrcVec = | |||
10280 | createVariablePermute(VT, SrcVec, IndicesVec, DL, DAG, Subtarget); | |||
10281 | if (NewSrcVec) | |||
10282 | return extractSubVector(NewSrcVec, 0, DAG, DL, SizeInBits); | |||
10283 | return SDValue(); | |||
10284 | } else if (SrcVec.getValueSizeInBits() < SizeInBits) { | |||
10285 | // Widen smaller SrcVec to match VT. | |||
10286 | SrcVec = widenSubVector(VT, SrcVec, false, Subtarget, DAG, SDLoc(SrcVec)); | |||
10287 | } else | |||
10288 | return SDValue(); | |||
10289 | } | |||
10290 | ||||
10291 | auto ScaleIndices = [&DAG](SDValue Idx, uint64_t Scale) { | |||
10292 | assert(isPowerOf2_64(Scale) && "Illegal variable permute shuffle scale")(static_cast <bool> (isPowerOf2_64(Scale) && "Illegal variable permute shuffle scale" ) ? void (0) : __assert_fail ("isPowerOf2_64(Scale) && \"Illegal variable permute shuffle scale\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 10292, __extension__ __PRETTY_FUNCTION__)); | |||
10293 | EVT SrcVT = Idx.getValueType(); | |||
10294 | unsigned NumDstBits = SrcVT.getScalarSizeInBits() / Scale; | |||
10295 | uint64_t IndexScale = 0; | |||
10296 | uint64_t IndexOffset = 0; | |||
10297 | ||||
10298 | // If we're scaling a smaller permute op, then we need to repeat the | |||
10299 | // indices, scaling and offsetting them as well. | |||
10300 | // e.g. v4i32 -> v16i8 (Scale = 4) | |||
10301 | // IndexScale = v4i32 Splat(4 << 24 | 4 << 16 | 4 << 8 | 4) | |||
10302 | // IndexOffset = v4i32 Splat(3 << 24 | 2 << 16 | 1 << 8 | 0) | |||
10303 | for (uint64_t i = 0; i != Scale; ++i) { | |||
10304 | IndexScale |= Scale << (i * NumDstBits); | |||
10305 | IndexOffset |= i << (i * NumDstBits); | |||
10306 | } | |||
10307 | ||||
10308 | Idx = DAG.getNode(ISD::MUL, SDLoc(Idx), SrcVT, Idx, | |||
10309 | DAG.getConstant(IndexScale, SDLoc(Idx), SrcVT)); | |||
10310 | Idx = DAG.getNode(ISD::ADD, SDLoc(Idx), SrcVT, Idx, | |||
10311 | DAG.getConstant(IndexOffset, SDLoc(Idx), SrcVT)); | |||
10312 | return Idx; | |||
10313 | }; | |||
10314 | ||||
10315 | unsigned Opcode = 0; | |||
10316 | switch (VT.SimpleTy) { | |||
10317 | default: | |||
10318 | break; | |||
10319 | case MVT::v16i8: | |||
10320 | if (Subtarget.hasSSSE3()) | |||
10321 | Opcode = X86ISD::PSHUFB; | |||
10322 | break; | |||
10323 | case MVT::v8i16: | |||
10324 | if (Subtarget.hasVLX() && Subtarget.hasBWI()) | |||
10325 | Opcode = X86ISD::VPERMV; | |||
10326 | else if (Subtarget.hasSSSE3()) { | |||
10327 | Opcode = X86ISD::PSHUFB; | |||
10328 | ShuffleVT = MVT::v16i8; | |||
10329 | } | |||
10330 | break; | |||
10331 | case MVT::v4f32: | |||
10332 | case MVT::v4i32: | |||
10333 | if (Subtarget.hasAVX()) { | |||
10334 | Opcode = X86ISD::VPERMILPV; | |||
10335 | ShuffleVT = MVT::v4f32; | |||
10336 | } else if (Subtarget.hasSSSE3()) { | |||
10337 | Opcode = X86ISD::PSHUFB; | |||
10338 | ShuffleVT = MVT::v16i8; | |||
10339 | } | |||
10340 | break; | |||
10341 | case MVT::v2f64: | |||
10342 | case MVT::v2i64: | |||
10343 | if (Subtarget.hasAVX()) { | |||
10344 | // VPERMILPD selects using bit#1 of the index vector, so scale IndicesVec. | |||
10345 | IndicesVec = DAG.getNode(ISD::ADD, DL, IndicesVT, IndicesVec, IndicesVec); | |||
10346 | Opcode = X86ISD::VPERMILPV; | |||
10347 | ShuffleVT = MVT::v2f64; | |||
10348 | } else if (Subtarget.hasSSE41()) { | |||
10349 | // SSE41 can compare v2i64 - select between indices 0 and 1. | |||
10350 | return DAG.getSelectCC( | |||
10351 | DL, IndicesVec, | |||
10352 | getZeroVector(IndicesVT.getSimpleVT(), Subtarget, DAG, DL), | |||
10353 | DAG.getVectorShuffle(VT, DL, SrcVec, SrcVec, {0, 0}), | |||
10354 | DAG.getVectorShuffle(VT, DL, SrcVec, SrcVec, {1, 1}), | |||
10355 | ISD::CondCode::SETEQ); | |||
10356 | } | |||
10357 | break; | |||
10358 | case MVT::v32i8: | |||
10359 | if (Subtarget.hasVLX() && Subtarget.hasVBMI()) | |||
10360 | Opcode = X86ISD::VPERMV; | |||
10361 | else if (Subtarget.hasXOP()) { | |||
10362 | SDValue LoSrc = extract128BitVector(SrcVec, 0, DAG, DL); | |||
10363 | SDValue HiSrc = extract128BitVector(SrcVec, 16, DAG, DL); | |||
10364 | SDValue LoIdx = extract128BitVector(IndicesVec, 0, DAG, DL); | |||
10365 | SDValue HiIdx = extract128BitVector(IndicesVec, 16, DAG, DL); | |||
10366 | return DAG.getNode( | |||
10367 | ISD::CONCAT_VECTORS, DL, VT, | |||
10368 | DAG.getNode(X86ISD::VPPERM, DL, MVT::v16i8, LoSrc, HiSrc, LoIdx), | |||
10369 | DAG.getNode(X86ISD::VPPERM, DL, MVT::v16i8, LoSrc, HiSrc, HiIdx)); | |||
10370 | } else if (Subtarget.hasAVX()) { | |||
10371 | SDValue Lo = extract128BitVector(SrcVec, 0, DAG, DL); | |||
10372 | SDValue Hi = extract128BitVector(SrcVec, 16, DAG, DL); | |||
10373 | SDValue LoLo = DAG.getNode(ISD::CONCAT_VECTORS, DL, VT, Lo, Lo); | |||
10374 | SDValue HiHi = DAG.getNode(ISD::CONCAT_VECTORS, DL, VT, Hi, Hi); | |||
10375 | auto PSHUFBBuilder = [](SelectionDAG &DAG, const SDLoc &DL, | |||
10376 | ArrayRef<SDValue> Ops) { | |||
10377 | // Permute Lo and Hi and then select based on index range. | |||
10378 | // This works as SHUFB uses bits[3:0] to permute elements and we don't | |||
10379 | // care about the bit[7] as its just an index vector. | |||
10380 | SDValue Idx = Ops[2]; | |||
10381 | EVT VT = Idx.getValueType(); | |||
10382 | return DAG.getSelectCC(DL, Idx, DAG.getConstant(15, DL, VT), | |||
10383 | DAG.getNode(X86ISD::PSHUFB, DL, VT, Ops[1], Idx), | |||
10384 | DAG.getNode(X86ISD::PSHUFB, DL, VT, Ops[0], Idx), | |||
10385 | ISD::CondCode::SETGT); | |||
10386 | }; | |||
10387 | SDValue Ops[] = {LoLo, HiHi, IndicesVec}; | |||
10388 | return SplitOpsAndApply(DAG, Subtarget, DL, MVT::v32i8, Ops, | |||
10389 | PSHUFBBuilder); | |||
10390 | } | |||
10391 | break; | |||
10392 | case MVT::v16i16: | |||
10393 | if (Subtarget.hasVLX() && Subtarget.hasBWI()) | |||
10394 | Opcode = X86ISD::VPERMV; | |||
10395 | else if (Subtarget.hasAVX()) { | |||
10396 | // Scale to v32i8 and perform as v32i8. | |||
10397 | IndicesVec = ScaleIndices(IndicesVec, 2); | |||
10398 | return DAG.getBitcast( | |||
10399 | VT, createVariablePermute( | |||
10400 | MVT::v32i8, DAG.getBitcast(MVT::v32i8, SrcVec), | |||
10401 | DAG.getBitcast(MVT::v32i8, IndicesVec), DL, DAG, Subtarget)); | |||
10402 | } | |||
10403 | break; | |||
10404 | case MVT::v8f32: | |||
10405 | case MVT::v8i32: | |||
10406 | if (Subtarget.hasAVX2()) | |||
10407 | Opcode = X86ISD::VPERMV; | |||
10408 | else if (Subtarget.hasAVX()) { | |||
10409 | SrcVec = DAG.getBitcast(MVT::v8f32, SrcVec); | |||
10410 | SDValue LoLo = DAG.getVectorShuffle(MVT::v8f32, DL, SrcVec, SrcVec, | |||
10411 | {0, 1, 2, 3, 0, 1, 2, 3}); | |||
10412 | SDValue HiHi = DAG.getVectorShuffle(MVT::v8f32, DL, SrcVec, SrcVec, | |||
10413 | {4, 5, 6, 7, 4, 5, 6, 7}); | |||
10414 | if (Subtarget.hasXOP()) | |||
10415 | return DAG.getBitcast( | |||
10416 | VT, DAG.getNode(X86ISD::VPERMIL2, DL, MVT::v8f32, LoLo, HiHi, | |||
10417 | IndicesVec, DAG.getTargetConstant(0, DL, MVT::i8))); | |||
10418 | // Permute Lo and Hi and then select based on index range. | |||
10419 | // This works as VPERMILPS only uses index bits[0:1] to permute elements. | |||
10420 | SDValue Res = DAG.getSelectCC( | |||
10421 | DL, IndicesVec, DAG.getConstant(3, DL, MVT::v8i32), | |||
10422 | DAG.getNode(X86ISD::VPERMILPV, DL, MVT::v8f32, HiHi, IndicesVec), | |||
10423 | DAG.getNode(X86ISD::VPERMILPV, DL, MVT::v8f32, LoLo, IndicesVec), | |||
10424 | ISD::CondCode::SETGT); | |||
10425 | return DAG.getBitcast(VT, Res); | |||
10426 | } | |||
10427 | break; | |||
10428 | case MVT::v4i64: | |||
10429 | case MVT::v4f64: | |||
10430 | if (Subtarget.hasAVX512()) { | |||
10431 | if (!Subtarget.hasVLX()) { | |||
10432 | MVT WidenSrcVT = MVT::getVectorVT(VT.getScalarType(), 8); | |||
10433 | SrcVec = widenSubVector(WidenSrcVT, SrcVec, false, Subtarget, DAG, | |||
10434 | SDLoc(SrcVec)); | |||
10435 | IndicesVec = widenSubVector(MVT::v8i64, IndicesVec, false, Subtarget, | |||
10436 | DAG, SDLoc(IndicesVec)); | |||
10437 | SDValue Res = createVariablePermute(WidenSrcVT, SrcVec, IndicesVec, DL, | |||
10438 | DAG, Subtarget); | |||
10439 | return extract256BitVector(Res, 0, DAG, DL); | |||
10440 | } | |||
10441 | Opcode = X86ISD::VPERMV; | |||
10442 | } else if (Subtarget.hasAVX()) { | |||
10443 | SrcVec = DAG.getBitcast(MVT::v4f64, SrcVec); | |||
10444 | SDValue LoLo = | |||
10445 | DAG.getVectorShuffle(MVT::v4f64, DL, SrcVec, SrcVec, {0, 1, 0, 1}); | |||
10446 | SDValue HiHi = | |||
10447 | DAG.getVectorShuffle(MVT::v4f64, DL, SrcVec, SrcVec, {2, 3, 2, 3}); | |||
10448 | // VPERMIL2PD selects with bit#1 of the index vector, so scale IndicesVec. | |||
10449 | IndicesVec = DAG.getNode(ISD::ADD, DL, IndicesVT, IndicesVec, IndicesVec); | |||
10450 | if (Subtarget.hasXOP()) | |||
10451 | return DAG.getBitcast( | |||
10452 | VT, DAG.getNode(X86ISD::VPERMIL2, DL, MVT::v4f64, LoLo, HiHi, | |||
10453 | IndicesVec, DAG.getTargetConstant(0, DL, MVT::i8))); | |||
10454 | // Permute Lo and Hi and then select based on index range. | |||
10455 | // This works as VPERMILPD only uses index bit[1] to permute elements. | |||
10456 | SDValue Res = DAG.getSelectCC( | |||
10457 | DL, IndicesVec, DAG.getConstant(2, DL, MVT::v4i64), | |||
10458 | DAG.getNode(X86ISD::VPERMILPV, DL, MVT::v4f64, HiHi, IndicesVec), | |||
10459 | DAG.getNode(X86ISD::VPERMILPV, DL, MVT::v4f64, LoLo, IndicesVec), | |||
10460 | ISD::CondCode::SETGT); | |||
10461 | return DAG.getBitcast(VT, Res); | |||
10462 | } | |||
10463 | break; | |||
10464 | case MVT::v64i8: | |||
10465 | if (Subtarget.hasVBMI()) | |||
10466 | Opcode = X86ISD::VPERMV; | |||
10467 | break; | |||
10468 | case MVT::v32i16: | |||
10469 | if (Subtarget.hasBWI()) | |||
10470 | Opcode = X86ISD::VPERMV; | |||
10471 | break; | |||
10472 | case MVT::v16f32: | |||
10473 | case MVT::v16i32: | |||
10474 | case MVT::v8f64: | |||
10475 | case MVT::v8i64: | |||
10476 | if (Subtarget.hasAVX512()) | |||
10477 | Opcode = X86ISD::VPERMV; | |||
10478 | break; | |||
10479 | } | |||
10480 | if (!Opcode) | |||
10481 | return SDValue(); | |||
10482 | ||||
10483 | assert((VT.getSizeInBits() == ShuffleVT.getSizeInBits()) &&(static_cast <bool> ((VT.getSizeInBits() == ShuffleVT.getSizeInBits ()) && (VT.getScalarSizeInBits() % ShuffleVT.getScalarSizeInBits ()) == 0 && "Illegal variable permute shuffle type") ? void (0) : __assert_fail ("(VT.getSizeInBits() == ShuffleVT.getSizeInBits()) && (VT.getScalarSizeInBits() % ShuffleVT.getScalarSizeInBits()) == 0 && \"Illegal variable permute shuffle type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 10485, __extension__ __PRETTY_FUNCTION__)) | |||
10484 | (VT.getScalarSizeInBits() % ShuffleVT.getScalarSizeInBits()) == 0 &&(static_cast <bool> ((VT.getSizeInBits() == ShuffleVT.getSizeInBits ()) && (VT.getScalarSizeInBits() % ShuffleVT.getScalarSizeInBits ()) == 0 && "Illegal variable permute shuffle type") ? void (0) : __assert_fail ("(VT.getSizeInBits() == ShuffleVT.getSizeInBits()) && (VT.getScalarSizeInBits() % ShuffleVT.getScalarSizeInBits()) == 0 && \"Illegal variable permute shuffle type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 10485, __extension__ __PRETTY_FUNCTION__)) | |||
10485 | "Illegal variable permute shuffle type")(static_cast <bool> ((VT.getSizeInBits() == ShuffleVT.getSizeInBits ()) && (VT.getScalarSizeInBits() % ShuffleVT.getScalarSizeInBits ()) == 0 && "Illegal variable permute shuffle type") ? void (0) : __assert_fail ("(VT.getSizeInBits() == ShuffleVT.getSizeInBits()) && (VT.getScalarSizeInBits() % ShuffleVT.getScalarSizeInBits()) == 0 && \"Illegal variable permute shuffle type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 10485, __extension__ __PRETTY_FUNCTION__)); | |||
10486 | ||||
10487 | uint64_t Scale = VT.getScalarSizeInBits() / ShuffleVT.getScalarSizeInBits(); | |||
10488 | if (Scale > 1) | |||
10489 | IndicesVec = ScaleIndices(IndicesVec, Scale); | |||
10490 | ||||
10491 | EVT ShuffleIdxVT = EVT(ShuffleVT).changeVectorElementTypeToInteger(); | |||
10492 | IndicesVec = DAG.getBitcast(ShuffleIdxVT, IndicesVec); | |||
10493 | ||||
10494 | SrcVec = DAG.getBitcast(ShuffleVT, SrcVec); | |||
10495 | SDValue Res = Opcode == X86ISD::VPERMV | |||
10496 | ? DAG.getNode(Opcode, DL, ShuffleVT, IndicesVec, SrcVec) | |||
10497 | : DAG.getNode(Opcode, DL, ShuffleVT, SrcVec, IndicesVec); | |||
10498 | return DAG.getBitcast(VT, Res); | |||
10499 | } | |||
10500 | ||||
10501 | // Tries to lower a BUILD_VECTOR composed of extract-extract chains that can be | |||
10502 | // reasoned to be a permutation of a vector by indices in a non-constant vector. | |||
10503 | // (build_vector (extract_elt V, (extract_elt I, 0)), | |||
10504 | // (extract_elt V, (extract_elt I, 1)), | |||
10505 | // ... | |||
10506 | // -> | |||
10507 | // (vpermv I, V) | |||
10508 | // | |||
10509 | // TODO: Handle undefs | |||
10510 | // TODO: Utilize pshufb and zero mask blending to support more efficient | |||
10511 | // construction of vectors with constant-0 elements. | |||
10512 | static SDValue | |||
10513 | LowerBUILD_VECTORAsVariablePermute(SDValue V, SelectionDAG &DAG, | |||
10514 | const X86Subtarget &Subtarget) { | |||
10515 | SDValue SrcVec, IndicesVec; | |||
10516 | // Check for a match of the permute source vector and permute index elements. | |||
10517 | // This is done by checking that the i-th build_vector operand is of the form: | |||
10518 | // (extract_elt SrcVec, (extract_elt IndicesVec, i)). | |||
10519 | for (unsigned Idx = 0, E = V.getNumOperands(); Idx != E; ++Idx) { | |||
10520 | SDValue Op = V.getOperand(Idx); | |||
10521 | if (Op.getOpcode() != ISD::EXTRACT_VECTOR_ELT) | |||
10522 | return SDValue(); | |||
10523 | ||||
10524 | // If this is the first extract encountered in V, set the source vector, | |||
10525 | // otherwise verify the extract is from the previously defined source | |||
10526 | // vector. | |||
10527 | if (!SrcVec) | |||
10528 | SrcVec = Op.getOperand(0); | |||
10529 | else if (SrcVec != Op.getOperand(0)) | |||
10530 | return SDValue(); | |||
10531 | SDValue ExtractedIndex = Op->getOperand(1); | |||
10532 | // Peek through extends. | |||
10533 | if (ExtractedIndex.getOpcode() == ISD::ZERO_EXTEND || | |||
10534 | ExtractedIndex.getOpcode() == ISD::SIGN_EXTEND) | |||
10535 | ExtractedIndex = ExtractedIndex.getOperand(0); | |||
10536 | if (ExtractedIndex.getOpcode() != ISD::EXTRACT_VECTOR_ELT) | |||
10537 | return SDValue(); | |||
10538 | ||||
10539 | // If this is the first extract from the index vector candidate, set the | |||
10540 | // indices vector, otherwise verify the extract is from the previously | |||
10541 | // defined indices vector. | |||
10542 | if (!IndicesVec) | |||
10543 | IndicesVec = ExtractedIndex.getOperand(0); | |||
10544 | else if (IndicesVec != ExtractedIndex.getOperand(0)) | |||
10545 | return SDValue(); | |||
10546 | ||||
10547 | auto *PermIdx = dyn_cast<ConstantSDNode>(ExtractedIndex.getOperand(1)); | |||
10548 | if (!PermIdx || PermIdx->getAPIntValue() != Idx) | |||
10549 | return SDValue(); | |||
10550 | } | |||
10551 | ||||
10552 | SDLoc DL(V); | |||
10553 | MVT VT = V.getSimpleValueType(); | |||
10554 | return createVariablePermute(VT, SrcVec, IndicesVec, DL, DAG, Subtarget); | |||
10555 | } | |||
10556 | ||||
10557 | SDValue | |||
10558 | X86TargetLowering::LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG) const { | |||
10559 | SDLoc dl(Op); | |||
10560 | ||||
10561 | MVT VT = Op.getSimpleValueType(); | |||
10562 | MVT EltVT = VT.getVectorElementType(); | |||
10563 | unsigned NumElems = Op.getNumOperands(); | |||
10564 | ||||
10565 | // Generate vectors for predicate vectors. | |||
10566 | if (VT.getVectorElementType() == MVT::i1 && Subtarget.hasAVX512()) | |||
10567 | return LowerBUILD_VECTORvXi1(Op, DAG, Subtarget); | |||
10568 | ||||
10569 | if (SDValue VectorConstant = materializeVectorConstant(Op, DAG, Subtarget)) | |||
10570 | return VectorConstant; | |||
10571 | ||||
10572 | unsigned EVTBits = EltVT.getSizeInBits(); | |||
10573 | APInt UndefMask = APInt::getNullValue(NumElems); | |||
10574 | APInt ZeroMask = APInt::getNullValue(NumElems); | |||
10575 | APInt NonZeroMask = APInt::getNullValue(NumElems); | |||
10576 | bool IsAllConstants = true; | |||
10577 | SmallSet<SDValue, 8> Values; | |||
10578 | unsigned NumConstants = NumElems; | |||
10579 | for (unsigned i = 0; i < NumElems; ++i) { | |||
10580 | SDValue Elt = Op.getOperand(i); | |||
10581 | if (Elt.isUndef()) { | |||
10582 | UndefMask.setBit(i); | |||
10583 | continue; | |||
10584 | } | |||
10585 | Values.insert(Elt); | |||
10586 | if (!isa<ConstantSDNode>(Elt) && !isa<ConstantFPSDNode>(Elt)) { | |||
10587 | IsAllConstants = false; | |||
10588 | NumConstants--; | |||
10589 | } | |||
10590 | if (X86::isZeroNode(Elt)) { | |||
10591 | ZeroMask.setBit(i); | |||
10592 | } else { | |||
10593 | NonZeroMask.setBit(i); | |||
10594 | } | |||
10595 | } | |||
10596 | ||||
10597 | // All undef vector. Return an UNDEF. All zero vectors were handled above. | |||
10598 | if (NonZeroMask == 0) { | |||
10599 | assert(UndefMask.isAllOnesValue() && "Fully undef mask expected")(static_cast <bool> (UndefMask.isAllOnesValue() && "Fully undef mask expected") ? void (0) : __assert_fail ("UndefMask.isAllOnesValue() && \"Fully undef mask expected\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 10599, __extension__ __PRETTY_FUNCTION__)); | |||
10600 | return DAG.getUNDEF(VT); | |||
10601 | } | |||
10602 | ||||
10603 | BuildVectorSDNode *BV = cast<BuildVectorSDNode>(Op.getNode()); | |||
10604 | ||||
10605 | // If the upper elts of a ymm/zmm are undef/zero then we might be better off | |||
10606 | // lowering to a smaller build vector and padding with undef/zero. | |||
10607 | if ((VT.is256BitVector() || VT.is512BitVector()) && | |||
10608 | !isFoldableUseOfShuffle(BV)) { | |||
10609 | unsigned UpperElems = NumElems / 2; | |||
10610 | APInt UndefOrZeroMask = UndefMask | ZeroMask; | |||
10611 | unsigned NumUpperUndefsOrZeros = UndefOrZeroMask.countLeadingOnes(); | |||
10612 | if (NumUpperUndefsOrZeros >= UpperElems) { | |||
10613 | if (VT.is512BitVector() && | |||
10614 | NumUpperUndefsOrZeros >= (NumElems - (NumElems / 4))) | |||
10615 | UpperElems = NumElems - (NumElems / 4); | |||
10616 | bool UndefUpper = UndefMask.countLeadingOnes() >= UpperElems; | |||
10617 | MVT LowerVT = MVT::getVectorVT(EltVT, NumElems - UpperElems); | |||
10618 | SDValue NewBV = | |||
10619 | DAG.getBuildVector(LowerVT, dl, Op->ops().drop_back(UpperElems)); | |||
10620 | return widenSubVector(VT, NewBV, !UndefUpper, Subtarget, DAG, dl); | |||
10621 | } | |||
10622 | } | |||
10623 | ||||
10624 | if (SDValue AddSub = lowerToAddSubOrFMAddSub(BV, Subtarget, DAG)) | |||
10625 | return AddSub; | |||
10626 | if (SDValue HorizontalOp = LowerToHorizontalOp(BV, Subtarget, DAG)) | |||
10627 | return HorizontalOp; | |||
10628 | if (SDValue Broadcast = lowerBuildVectorAsBroadcast(BV, Subtarget, DAG)) | |||
10629 | return Broadcast; | |||
10630 | if (SDValue BitOp = lowerBuildVectorToBitOp(BV, Subtarget, DAG)) | |||
10631 | return BitOp; | |||
10632 | ||||
10633 | unsigned NumZero = ZeroMask.countPopulation(); | |||
10634 | unsigned NumNonZero = NonZeroMask.countPopulation(); | |||
10635 | ||||
10636 | // If we are inserting one variable into a vector of non-zero constants, try | |||
10637 | // to avoid loading each constant element as a scalar. Load the constants as a | |||
10638 | // vector and then insert the variable scalar element. If insertion is not | |||
10639 | // supported, fall back to a shuffle to get the scalar blended with the | |||
10640 | // constants. Insertion into a zero vector is handled as a special-case | |||
10641 | // somewhere below here. | |||
10642 | if (NumConstants == NumElems - 1 && NumNonZero != 1 && | |||
10643 | (isOperationLegalOrCustom(ISD::INSERT_VECTOR_ELT, VT) || | |||
10644 | isOperationLegalOrCustom(ISD::VECTOR_SHUFFLE, VT))) { | |||
10645 | // Create an all-constant vector. The variable element in the old | |||
10646 | // build vector is replaced by undef in the constant vector. Save the | |||
10647 | // variable scalar element and its index for use in the insertelement. | |||
10648 | LLVMContext &Context = *DAG.getContext(); | |||
10649 | Type *EltType = Op.getValueType().getScalarType().getTypeForEVT(Context); | |||
10650 | SmallVector<Constant *, 16> ConstVecOps(NumElems, UndefValue::get(EltType)); | |||
10651 | SDValue VarElt; | |||
10652 | SDValue InsIndex; | |||
10653 | for (unsigned i = 0; i != NumElems; ++i) { | |||
10654 | SDValue Elt = Op.getOperand(i); | |||
10655 | if (auto *C = dyn_cast<ConstantSDNode>(Elt)) | |||
10656 | ConstVecOps[i] = ConstantInt::get(Context, C->getAPIntValue()); | |||
10657 | else if (auto *C = dyn_cast<ConstantFPSDNode>(Elt)) | |||
10658 | ConstVecOps[i] = ConstantFP::get(Context, C->getValueAPF()); | |||
10659 | else if (!Elt.isUndef()) { | |||
10660 | assert(!VarElt.getNode() && !InsIndex.getNode() &&(static_cast <bool> (!VarElt.getNode() && !InsIndex .getNode() && "Expected one variable element in this vector" ) ? void (0) : __assert_fail ("!VarElt.getNode() && !InsIndex.getNode() && \"Expected one variable element in this vector\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 10661, __extension__ __PRETTY_FUNCTION__)) | |||
10661 | "Expected one variable element in this vector")(static_cast <bool> (!VarElt.getNode() && !InsIndex .getNode() && "Expected one variable element in this vector" ) ? void (0) : __assert_fail ("!VarElt.getNode() && !InsIndex.getNode() && \"Expected one variable element in this vector\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 10661, __extension__ __PRETTY_FUNCTION__)); | |||
10662 | VarElt = Elt; | |||
10663 | InsIndex = DAG.getVectorIdxConstant(i, dl); | |||
10664 | } | |||
10665 | } | |||
10666 | Constant *CV = ConstantVector::get(ConstVecOps); | |||
10667 | SDValue DAGConstVec = DAG.getConstantPool(CV, VT); | |||
10668 | ||||
10669 | // The constants we just created may not be legal (eg, floating point). We | |||
10670 | // must lower the vector right here because we can not guarantee that we'll | |||
10671 | // legalize it before loading it. This is also why we could not just create | |||
10672 | // a new build vector here. If the build vector contains illegal constants, | |||
10673 | // it could get split back up into a series of insert elements. | |||
10674 | // TODO: Improve this by using shorter loads with broadcast/VZEXT_LOAD. | |||
10675 | SDValue LegalDAGConstVec = LowerConstantPool(DAGConstVec, DAG); | |||
10676 | MachineFunction &MF = DAG.getMachineFunction(); | |||
10677 | MachinePointerInfo MPI = MachinePointerInfo::getConstantPool(MF); | |||
10678 | SDValue Ld = DAG.getLoad(VT, dl, DAG.getEntryNode(), LegalDAGConstVec, MPI); | |||
10679 | unsigned InsertC = cast<ConstantSDNode>(InsIndex)->getZExtValue(); | |||
10680 | unsigned NumEltsInLow128Bits = 128 / VT.getScalarSizeInBits(); | |||
10681 | if (InsertC < NumEltsInLow128Bits) | |||
10682 | return DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VT, Ld, VarElt, InsIndex); | |||
10683 | ||||
10684 | // There's no good way to insert into the high elements of a >128-bit | |||
10685 | // vector, so use shuffles to avoid an extract/insert sequence. | |||
10686 | assert(VT.getSizeInBits() > 128 && "Invalid insertion index?")(static_cast <bool> (VT.getSizeInBits() > 128 && "Invalid insertion index?") ? void (0) : __assert_fail ("VT.getSizeInBits() > 128 && \"Invalid insertion index?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 10686, __extension__ __PRETTY_FUNCTION__)); | |||
10687 | assert(Subtarget.hasAVX() && "Must have AVX with >16-byte vector")(static_cast <bool> (Subtarget.hasAVX() && "Must have AVX with >16-byte vector" ) ? void (0) : __assert_fail ("Subtarget.hasAVX() && \"Must have AVX with >16-byte vector\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 10687, __extension__ __PRETTY_FUNCTION__)); | |||
10688 | SmallVector<int, 8> ShuffleMask; | |||
10689 | unsigned NumElts = VT.getVectorNumElements(); | |||
10690 | for (unsigned i = 0; i != NumElts; ++i) | |||
10691 | ShuffleMask.push_back(i == InsertC ? NumElts : i); | |||
10692 | SDValue S2V = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, VarElt); | |||
10693 | return DAG.getVectorShuffle(VT, dl, Ld, S2V, ShuffleMask); | |||
10694 | } | |||
10695 | ||||
10696 | // Special case for single non-zero, non-undef, element. | |||
10697 | if (NumNonZero == 1) { | |||
10698 | unsigned Idx = NonZeroMask.countTrailingZeros(); | |||
10699 | SDValue Item = Op.getOperand(Idx); | |||
10700 | ||||
10701 | // If we have a constant or non-constant insertion into the low element of | |||
10702 | // a vector, we can do this with SCALAR_TO_VECTOR + shuffle of zero into | |||
10703 | // the rest of the elements. This will be matched as movd/movq/movss/movsd | |||
10704 | // depending on what the source datatype is. | |||
10705 | if (Idx == 0) { | |||
10706 | if (NumZero == 0) | |||
10707 | return DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Item); | |||
10708 | ||||
10709 | if (EltVT == MVT::i32 || EltVT == MVT::f16 || EltVT == MVT::f32 || | |||
10710 | EltVT == MVT::f64 || (EltVT == MVT::i64 && Subtarget.is64Bit()) || | |||
10711 | (EltVT == MVT::i16 && Subtarget.hasFP16())) { | |||
10712 | assert((VT.is128BitVector() || VT.is256BitVector() ||(static_cast <bool> ((VT.is128BitVector() || VT.is256BitVector () || VT.is512BitVector()) && "Expected an SSE value type!" ) ? void (0) : __assert_fail ("(VT.is128BitVector() || VT.is256BitVector() || VT.is512BitVector()) && \"Expected an SSE value type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 10714, __extension__ __PRETTY_FUNCTION__)) | |||
10713 | VT.is512BitVector()) &&(static_cast <bool> ((VT.is128BitVector() || VT.is256BitVector () || VT.is512BitVector()) && "Expected an SSE value type!" ) ? void (0) : __assert_fail ("(VT.is128BitVector() || VT.is256BitVector() || VT.is512BitVector()) && \"Expected an SSE value type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 10714, __extension__ __PRETTY_FUNCTION__)) | |||
10714 | "Expected an SSE value type!")(static_cast <bool> ((VT.is128BitVector() || VT.is256BitVector () || VT.is512BitVector()) && "Expected an SSE value type!" ) ? void (0) : __assert_fail ("(VT.is128BitVector() || VT.is256BitVector() || VT.is512BitVector()) && \"Expected an SSE value type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 10714, __extension__ __PRETTY_FUNCTION__)); | |||
10715 | Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Item); | |||
10716 | // Turn it into a MOVL (i.e. movsh, movss, movsd, movw or movd) to a | |||
10717 | // zero vector. | |||
10718 | return getShuffleVectorZeroOrUndef(Item, 0, true, Subtarget, DAG); | |||
10719 | } | |||
10720 | ||||
10721 | // We can't directly insert an i8 or i16 into a vector, so zero extend | |||
10722 | // it to i32 first. | |||
10723 | if (EltVT == MVT::i16 || EltVT == MVT::i8) { | |||
10724 | Item = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, Item); | |||
10725 | MVT ShufVT = MVT::getVectorVT(MVT::i32, VT.getSizeInBits() / 32); | |||
10726 | Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, ShufVT, Item); | |||
10727 | Item = getShuffleVectorZeroOrUndef(Item, 0, true, Subtarget, DAG); | |||
10728 | return DAG.getBitcast(VT, Item); | |||
10729 | } | |||
10730 | } | |||
10731 | ||||
10732 | // Is it a vector logical left shift? | |||
10733 | if (NumElems == 2 && Idx == 1 && | |||
10734 | X86::isZeroNode(Op.getOperand(0)) && | |||
10735 | !X86::isZeroNode(Op.getOperand(1))) { | |||
10736 | unsigned NumBits = VT.getSizeInBits(); | |||
10737 | return getVShift(true, VT, | |||
10738 | DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, | |||
10739 | VT, Op.getOperand(1)), | |||
10740 | NumBits/2, DAG, *this, dl); | |||
10741 | } | |||
10742 | ||||
10743 | if (IsAllConstants) // Otherwise, it's better to do a constpool load. | |||
10744 | return SDValue(); | |||
10745 | ||||
10746 | // Otherwise, if this is a vector with i32 or f32 elements, and the element | |||
10747 | // is a non-constant being inserted into an element other than the low one, | |||
10748 | // we can't use a constant pool load. Instead, use SCALAR_TO_VECTOR (aka | |||
10749 | // movd/movss) to move this into the low element, then shuffle it into | |||
10750 | // place. | |||
10751 | if (EVTBits == 32) { | |||
10752 | Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Item); | |||
10753 | return getShuffleVectorZeroOrUndef(Item, Idx, NumZero > 0, Subtarget, DAG); | |||
10754 | } | |||
10755 | } | |||
10756 | ||||
10757 | // Splat is obviously ok. Let legalizer expand it to a shuffle. | |||
10758 | if (Values.size() == 1) { | |||
10759 | if (EVTBits == 32) { | |||
10760 | // Instead of a shuffle like this: | |||
10761 | // shuffle (scalar_to_vector (load (ptr + 4))), undef, <0, 0, 0, 0> | |||
10762 | // Check if it's possible to issue this instead. | |||
10763 | // shuffle (vload ptr)), undef, <1, 1, 1, 1> | |||
10764 | unsigned Idx = NonZeroMask.countTrailingZeros(); | |||
10765 | SDValue Item = Op.getOperand(Idx); | |||
10766 | if (Op.getNode()->isOnlyUserOf(Item.getNode())) | |||
10767 | return LowerAsSplatVectorLoad(Item, VT, dl, DAG); | |||
10768 | } | |||
10769 | return SDValue(); | |||
10770 | } | |||
10771 | ||||
10772 | // A vector full of immediates; various special cases are already | |||
10773 | // handled, so this is best done with a single constant-pool load. | |||
10774 | if (IsAllConstants) | |||
10775 | return SDValue(); | |||
10776 | ||||
10777 | if (SDValue V = LowerBUILD_VECTORAsVariablePermute(Op, DAG, Subtarget)) | |||
10778 | return V; | |||
10779 | ||||
10780 | // See if we can use a vector load to get all of the elements. | |||
10781 | { | |||
10782 | SmallVector<SDValue, 64> Ops(Op->op_begin(), Op->op_begin() + NumElems); | |||
10783 | if (SDValue LD = | |||
10784 | EltsFromConsecutiveLoads(VT, Ops, dl, DAG, Subtarget, false)) | |||
10785 | return LD; | |||
10786 | } | |||
10787 | ||||
10788 | // If this is a splat of pairs of 32-bit elements, we can use a narrower | |||
10789 | // build_vector and broadcast it. | |||
10790 | // TODO: We could probably generalize this more. | |||
10791 | if (Subtarget.hasAVX2() && EVTBits == 32 && Values.size() == 2) { | |||
10792 | SDValue Ops[4] = { Op.getOperand(0), Op.getOperand(1), | |||
10793 | DAG.getUNDEF(EltVT), DAG.getUNDEF(EltVT) }; | |||
10794 | auto CanSplat = [](SDValue Op, unsigned NumElems, ArrayRef<SDValue> Ops) { | |||
10795 | // Make sure all the even/odd operands match. | |||
10796 | for (unsigned i = 2; i != NumElems; ++i) | |||
10797 | if (Ops[i % 2] != Op.getOperand(i)) | |||
10798 | return false; | |||
10799 | return true; | |||
10800 | }; | |||
10801 | if (CanSplat(Op, NumElems, Ops)) { | |||
10802 | MVT WideEltVT = VT.isFloatingPoint() ? MVT::f64 : MVT::i64; | |||
10803 | MVT NarrowVT = MVT::getVectorVT(EltVT, 4); | |||
10804 | // Create a new build vector and cast to v2i64/v2f64. | |||
10805 | SDValue NewBV = DAG.getBitcast(MVT::getVectorVT(WideEltVT, 2), | |||
10806 | DAG.getBuildVector(NarrowVT, dl, Ops)); | |||
10807 | // Broadcast from v2i64/v2f64 and cast to final VT. | |||
10808 | MVT BcastVT = MVT::getVectorVT(WideEltVT, NumElems / 2); | |||
10809 | return DAG.getBitcast(VT, DAG.getNode(X86ISD::VBROADCAST, dl, BcastVT, | |||
10810 | NewBV)); | |||
10811 | } | |||
10812 | } | |||
10813 | ||||
10814 | // For AVX-length vectors, build the individual 128-bit pieces and use | |||
10815 | // shuffles to put them in place. | |||
10816 | if (VT.getSizeInBits() > 128) { | |||
10817 | MVT HVT = MVT::getVectorVT(EltVT, NumElems / 2); | |||
10818 | ||||
10819 | // Build both the lower and upper subvector. | |||
10820 | SDValue Lower = | |||
10821 | DAG.getBuildVector(HVT, dl, Op->ops().slice(0, NumElems / 2)); | |||
10822 | SDValue Upper = DAG.getBuildVector( | |||
10823 | HVT, dl, Op->ops().slice(NumElems / 2, NumElems /2)); | |||
10824 | ||||
10825 | // Recreate the wider vector with the lower and upper part. | |||
10826 | return concatSubVectors(Lower, Upper, DAG, dl); | |||
10827 | } | |||
10828 | ||||
10829 | // Let legalizer expand 2-wide build_vectors. | |||
10830 | if (EVTBits == 64) { | |||
10831 | if (NumNonZero == 1) { | |||
10832 | // One half is zero or undef. | |||
10833 | unsigned Idx = NonZeroMask.countTrailingZeros(); | |||
10834 | SDValue V2 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, | |||
10835 | Op.getOperand(Idx)); | |||
10836 | return getShuffleVectorZeroOrUndef(V2, Idx, true, Subtarget, DAG); | |||
10837 | } | |||
10838 | return SDValue(); | |||
10839 | } | |||
10840 | ||||
10841 | // If element VT is < 32 bits, convert it to inserts into a zero vector. | |||
10842 | if (EVTBits == 8 && NumElems == 16) | |||
10843 | if (SDValue V = LowerBuildVectorv16i8(Op, NonZeroMask, NumNonZero, NumZero, | |||
10844 | DAG, Subtarget)) | |||
10845 | return V; | |||
10846 | ||||
10847 | if (EltVT == MVT::i16 && NumElems == 8) | |||
10848 | if (SDValue V = LowerBuildVectorv8i16(Op, NonZeroMask, NumNonZero, NumZero, | |||
10849 | DAG, Subtarget)) | |||
10850 | return V; | |||
10851 | ||||
10852 | // If element VT is == 32 bits and has 4 elems, try to generate an INSERTPS | |||
10853 | if (EVTBits == 32 && NumElems == 4) | |||
10854 | if (SDValue V = LowerBuildVectorv4x32(Op, DAG, Subtarget)) | |||
10855 | return V; | |||
10856 | ||||
10857 | // If element VT is == 32 bits, turn it into a number of shuffles. | |||
10858 | if (NumElems == 4 && NumZero > 0) { | |||
10859 | SmallVector<SDValue, 8> Ops(NumElems); | |||
10860 | for (unsigned i = 0; i < 4; ++i) { | |||
10861 | bool isZero = !NonZeroMask[i]; | |||
10862 | if (isZero) | |||
10863 | Ops[i] = getZeroVector(VT, Subtarget, DAG, dl); | |||
10864 | else | |||
10865 | Ops[i] = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Op.getOperand(i)); | |||
10866 | } | |||
10867 | ||||
10868 | for (unsigned i = 0; i < 2; ++i) { | |||
10869 | switch (NonZeroMask.extractBitsAsZExtValue(2, i * 2)) { | |||
10870 | default: llvm_unreachable("Unexpected NonZero count")::llvm::llvm_unreachable_internal("Unexpected NonZero count", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 10870); | |||
10871 | case 0: | |||
10872 | Ops[i] = Ops[i*2]; // Must be a zero vector. | |||
10873 | break; | |||
10874 | case 1: | |||
10875 | Ops[i] = getMOVL(DAG, dl, VT, Ops[i*2+1], Ops[i*2]); | |||
10876 | break; | |||
10877 | case 2: | |||
10878 | Ops[i] = getMOVL(DAG, dl, VT, Ops[i*2], Ops[i*2+1]); | |||
10879 | break; | |||
10880 | case 3: | |||
10881 | Ops[i] = getUnpackl(DAG, dl, VT, Ops[i*2], Ops[i*2+1]); | |||
10882 | break; | |||
10883 | } | |||
10884 | } | |||
10885 | ||||
10886 | bool Reverse1 = NonZeroMask.extractBitsAsZExtValue(2, 0) == 2; | |||
10887 | bool Reverse2 = NonZeroMask.extractBitsAsZExtValue(2, 2) == 2; | |||
10888 | int MaskVec[] = { | |||
10889 | Reverse1 ? 1 : 0, | |||
10890 | Reverse1 ? 0 : 1, | |||
10891 | static_cast<int>(Reverse2 ? NumElems+1 : NumElems), | |||
10892 | static_cast<int>(Reverse2 ? NumElems : NumElems+1) | |||
10893 | }; | |||
10894 | return DAG.getVectorShuffle(VT, dl, Ops[0], Ops[1], MaskVec); | |||
10895 | } | |||
10896 | ||||
10897 | assert(Values.size() > 1 && "Expected non-undef and non-splat vector")(static_cast <bool> (Values.size() > 1 && "Expected non-undef and non-splat vector" ) ? void (0) : __assert_fail ("Values.size() > 1 && \"Expected non-undef and non-splat vector\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 10897, __extension__ __PRETTY_FUNCTION__)); | |||
10898 | ||||
10899 | // Check for a build vector from mostly shuffle plus few inserting. | |||
10900 | if (SDValue Sh = buildFromShuffleMostly(Op, DAG)) | |||
10901 | return Sh; | |||
10902 | ||||
10903 | // For SSE 4.1, use insertps to put the high elements into the low element. | |||
10904 | if (Subtarget.hasSSE41() && EltVT != MVT::f16) { | |||
10905 | SDValue Result; | |||
10906 | if (!Op.getOperand(0).isUndef()) | |||
10907 | Result = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Op.getOperand(0)); | |||
10908 | else | |||
10909 | Result = DAG.getUNDEF(VT); | |||
10910 | ||||
10911 | for (unsigned i = 1; i < NumElems; ++i) { | |||
10912 | if (Op.getOperand(i).isUndef()) continue; | |||
10913 | Result = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VT, Result, | |||
10914 | Op.getOperand(i), DAG.getIntPtrConstant(i, dl)); | |||
10915 | } | |||
10916 | return Result; | |||
10917 | } | |||
10918 | ||||
10919 | // Otherwise, expand into a number of unpckl*, start by extending each of | |||
10920 | // our (non-undef) elements to the full vector width with the element in the | |||
10921 | // bottom slot of the vector (which generates no code for SSE). | |||
10922 | SmallVector<SDValue, 8> Ops(NumElems); | |||
10923 | for (unsigned i = 0; i < NumElems; ++i) { | |||
10924 | if (!Op.getOperand(i).isUndef()) | |||
10925 | Ops[i] = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Op.getOperand(i)); | |||
10926 | else | |||
10927 | Ops[i] = DAG.getUNDEF(VT); | |||
10928 | } | |||
10929 | ||||
10930 | // Next, we iteratively mix elements, e.g. for v4f32: | |||
10931 | // Step 1: unpcklps 0, 1 ==> X: <?, ?, 1, 0> | |||
10932 | // : unpcklps 2, 3 ==> Y: <?, ?, 3, 2> | |||
10933 | // Step 2: unpcklpd X, Y ==> <3, 2, 1, 0> | |||
10934 | for (unsigned Scale = 1; Scale < NumElems; Scale *= 2) { | |||
10935 | // Generate scaled UNPCKL shuffle mask. | |||
10936 | SmallVector<int, 16> Mask; | |||
10937 | for(unsigned i = 0; i != Scale; ++i) | |||
10938 | Mask.push_back(i); | |||
10939 | for (unsigned i = 0; i != Scale; ++i) | |||
10940 | Mask.push_back(NumElems+i); | |||
10941 | Mask.append(NumElems - Mask.size(), SM_SentinelUndef); | |||
10942 | ||||
10943 | for (unsigned i = 0, e = NumElems / (2 * Scale); i != e; ++i) | |||
10944 | Ops[i] = DAG.getVectorShuffle(VT, dl, Ops[2*i], Ops[(2*i)+1], Mask); | |||
10945 | } | |||
10946 | return Ops[0]; | |||
10947 | } | |||
10948 | ||||
10949 | // 256-bit AVX can use the vinsertf128 instruction | |||
10950 | // to create 256-bit vectors from two other 128-bit ones. | |||
10951 | // TODO: Detect subvector broadcast here instead of DAG combine? | |||
10952 | static SDValue LowerAVXCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG, | |||
10953 | const X86Subtarget &Subtarget) { | |||
10954 | SDLoc dl(Op); | |||
10955 | MVT ResVT = Op.getSimpleValueType(); | |||
10956 | ||||
10957 | assert((ResVT.is256BitVector() ||(static_cast <bool> ((ResVT.is256BitVector() || ResVT.is512BitVector ()) && "Value type must be 256-/512-bit wide") ? void (0) : __assert_fail ("(ResVT.is256BitVector() || ResVT.is512BitVector()) && \"Value type must be 256-/512-bit wide\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 10958, __extension__ __PRETTY_FUNCTION__)) | |||
10958 | ResVT.is512BitVector()) && "Value type must be 256-/512-bit wide")(static_cast <bool> ((ResVT.is256BitVector() || ResVT.is512BitVector ()) && "Value type must be 256-/512-bit wide") ? void (0) : __assert_fail ("(ResVT.is256BitVector() || ResVT.is512BitVector()) && \"Value type must be 256-/512-bit wide\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 10958, __extension__ __PRETTY_FUNCTION__)); | |||
10959 | ||||
10960 | unsigned NumOperands = Op.getNumOperands(); | |||
10961 | unsigned NumZero = 0; | |||
10962 | unsigned NumNonZero = 0; | |||
10963 | unsigned NonZeros = 0; | |||
10964 | for (unsigned i = 0; i != NumOperands; ++i) { | |||
10965 | SDValue SubVec = Op.getOperand(i); | |||
10966 | if (SubVec.isUndef()) | |||
10967 | continue; | |||
10968 | if (ISD::isBuildVectorAllZeros(SubVec.getNode())) | |||
10969 | ++NumZero; | |||
10970 | else { | |||
10971 | assert(i < sizeof(NonZeros) * CHAR_BIT)(static_cast <bool> (i < sizeof(NonZeros) * 8) ? void (0) : __assert_fail ("i < sizeof(NonZeros) * CHAR_BIT", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 10971, __extension__ __PRETTY_FUNCTION__)); // Ensure the shift is in range. | |||
10972 | NonZeros |= 1 << i; | |||
10973 | ++NumNonZero; | |||
10974 | } | |||
10975 | } | |||
10976 | ||||
10977 | // If we have more than 2 non-zeros, build each half separately. | |||
10978 | if (NumNonZero > 2) { | |||
10979 | MVT HalfVT = ResVT.getHalfNumVectorElementsVT(); | |||
10980 | ArrayRef<SDUse> Ops = Op->ops(); | |||
10981 | SDValue Lo = DAG.getNode(ISD::CONCAT_VECTORS, dl, HalfVT, | |||
10982 | Ops.slice(0, NumOperands/2)); | |||
10983 | SDValue Hi = DAG.getNode(ISD::CONCAT_VECTORS, dl, HalfVT, | |||
10984 | Ops.slice(NumOperands/2)); | |||
10985 | return DAG.getNode(ISD::CONCAT_VECTORS, dl, ResVT, Lo, Hi); | |||
10986 | } | |||
10987 | ||||
10988 | // Otherwise, build it up through insert_subvectors. | |||
10989 | SDValue Vec = NumZero ? getZeroVector(ResVT, Subtarget, DAG, dl) | |||
10990 | : DAG.getUNDEF(ResVT); | |||
10991 | ||||
10992 | MVT SubVT = Op.getOperand(0).getSimpleValueType(); | |||
10993 | unsigned NumSubElems = SubVT.getVectorNumElements(); | |||
10994 | for (unsigned i = 0; i != NumOperands; ++i) { | |||
10995 | if ((NonZeros & (1 << i)) == 0) | |||
10996 | continue; | |||
10997 | ||||
10998 | Vec = DAG.getNode(ISD::INSERT_SUBVECTOR, dl, ResVT, Vec, | |||
10999 | Op.getOperand(i), | |||
11000 | DAG.getIntPtrConstant(i * NumSubElems, dl)); | |||
11001 | } | |||
11002 | ||||
11003 | return Vec; | |||
11004 | } | |||
11005 | ||||
11006 | // Returns true if the given node is a type promotion (by concatenating i1 | |||
11007 | // zeros) of the result of a node that already zeros all upper bits of | |||
11008 | // k-register. | |||
11009 | // TODO: Merge this with LowerAVXCONCAT_VECTORS? | |||
11010 | static SDValue LowerCONCAT_VECTORSvXi1(SDValue Op, | |||
11011 | const X86Subtarget &Subtarget, | |||
11012 | SelectionDAG & DAG) { | |||
11013 | SDLoc dl(Op); | |||
11014 | MVT ResVT = Op.getSimpleValueType(); | |||
11015 | unsigned NumOperands = Op.getNumOperands(); | |||
11016 | ||||
11017 | assert(NumOperands > 1 && isPowerOf2_32(NumOperands) &&(static_cast <bool> (NumOperands > 1 && isPowerOf2_32 (NumOperands) && "Unexpected number of operands in CONCAT_VECTORS" ) ? void (0) : __assert_fail ("NumOperands > 1 && isPowerOf2_32(NumOperands) && \"Unexpected number of operands in CONCAT_VECTORS\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11018, __extension__ __PRETTY_FUNCTION__)) | |||
11018 | "Unexpected number of operands in CONCAT_VECTORS")(static_cast <bool> (NumOperands > 1 && isPowerOf2_32 (NumOperands) && "Unexpected number of operands in CONCAT_VECTORS" ) ? void (0) : __assert_fail ("NumOperands > 1 && isPowerOf2_32(NumOperands) && \"Unexpected number of operands in CONCAT_VECTORS\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11018, __extension__ __PRETTY_FUNCTION__)); | |||
11019 | ||||
11020 | uint64_t Zeros = 0; | |||
11021 | uint64_t NonZeros = 0; | |||
11022 | for (unsigned i = 0; i != NumOperands; ++i) { | |||
11023 | SDValue SubVec = Op.getOperand(i); | |||
11024 | if (SubVec.isUndef()) | |||
11025 | continue; | |||
11026 | assert(i < sizeof(NonZeros) * CHAR_BIT)(static_cast <bool> (i < sizeof(NonZeros) * 8) ? void (0) : __assert_fail ("i < sizeof(NonZeros) * CHAR_BIT", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11026, __extension__ __PRETTY_FUNCTION__)); // Ensure the shift is in range. | |||
11027 | if (ISD::isBuildVectorAllZeros(SubVec.getNode())) | |||
11028 | Zeros |= (uint64_t)1 << i; | |||
11029 | else | |||
11030 | NonZeros |= (uint64_t)1 << i; | |||
11031 | } | |||
11032 | ||||
11033 | unsigned NumElems = ResVT.getVectorNumElements(); | |||
11034 | ||||
11035 | // If we are inserting non-zero vector and there are zeros in LSBs and undef | |||
11036 | // in the MSBs we need to emit a KSHIFTL. The generic lowering to | |||
11037 | // insert_subvector will give us two kshifts. | |||
11038 | if (isPowerOf2_64(NonZeros) && Zeros != 0 && NonZeros > Zeros && | |||
11039 | Log2_64(NonZeros) != NumOperands - 1) { | |||
11040 | MVT ShiftVT = ResVT; | |||
11041 | if ((!Subtarget.hasDQI() && NumElems == 8) || NumElems < 8) | |||
11042 | ShiftVT = Subtarget.hasDQI() ? MVT::v8i1 : MVT::v16i1; | |||
11043 | unsigned Idx = Log2_64(NonZeros); | |||
11044 | SDValue SubVec = Op.getOperand(Idx); | |||
11045 | unsigned SubVecNumElts = SubVec.getSimpleValueType().getVectorNumElements(); | |||
11046 | SubVec = DAG.getNode(ISD::INSERT_SUBVECTOR, dl, ShiftVT, | |||
11047 | DAG.getUNDEF(ShiftVT), SubVec, | |||
11048 | DAG.getIntPtrConstant(0, dl)); | |||
11049 | Op = DAG.getNode(X86ISD::KSHIFTL, dl, ShiftVT, SubVec, | |||
11050 | DAG.getTargetConstant(Idx * SubVecNumElts, dl, MVT::i8)); | |||
11051 | return DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, ResVT, Op, | |||
11052 | DAG.getIntPtrConstant(0, dl)); | |||
11053 | } | |||
11054 | ||||
11055 | // If there are zero or one non-zeros we can handle this very simply. | |||
11056 | if (NonZeros == 0 || isPowerOf2_64(NonZeros)) { | |||
11057 | SDValue Vec = Zeros ? DAG.getConstant(0, dl, ResVT) : DAG.getUNDEF(ResVT); | |||
11058 | if (!NonZeros) | |||
11059 | return Vec; | |||
11060 | unsigned Idx = Log2_64(NonZeros); | |||
11061 | SDValue SubVec = Op.getOperand(Idx); | |||
11062 | unsigned SubVecNumElts = SubVec.getSimpleValueType().getVectorNumElements(); | |||
11063 | return DAG.getNode(ISD::INSERT_SUBVECTOR, dl, ResVT, Vec, SubVec, | |||
11064 | DAG.getIntPtrConstant(Idx * SubVecNumElts, dl)); | |||
11065 | } | |||
11066 | ||||
11067 | if (NumOperands > 2) { | |||
11068 | MVT HalfVT = ResVT.getHalfNumVectorElementsVT(); | |||
11069 | ArrayRef<SDUse> Ops = Op->ops(); | |||
11070 | SDValue Lo = DAG.getNode(ISD::CONCAT_VECTORS, dl, HalfVT, | |||
11071 | Ops.slice(0, NumOperands/2)); | |||
11072 | SDValue Hi = DAG.getNode(ISD::CONCAT_VECTORS, dl, HalfVT, | |||
11073 | Ops.slice(NumOperands/2)); | |||
11074 | return DAG.getNode(ISD::CONCAT_VECTORS, dl, ResVT, Lo, Hi); | |||
11075 | } | |||
11076 | ||||
11077 | assert(countPopulation(NonZeros) == 2 && "Simple cases not handled?")(static_cast <bool> (countPopulation(NonZeros) == 2 && "Simple cases not handled?") ? void (0) : __assert_fail ("countPopulation(NonZeros) == 2 && \"Simple cases not handled?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11077, __extension__ __PRETTY_FUNCTION__)); | |||
11078 | ||||
11079 | if (ResVT.getVectorNumElements() >= 16) | |||
11080 | return Op; // The operation is legal with KUNPCK | |||
11081 | ||||
11082 | SDValue Vec = DAG.getNode(ISD::INSERT_SUBVECTOR, dl, ResVT, | |||
11083 | DAG.getUNDEF(ResVT), Op.getOperand(0), | |||
11084 | DAG.getIntPtrConstant(0, dl)); | |||
11085 | return DAG.getNode(ISD::INSERT_SUBVECTOR, dl, ResVT, Vec, Op.getOperand(1), | |||
11086 | DAG.getIntPtrConstant(NumElems/2, dl)); | |||
11087 | } | |||
11088 | ||||
11089 | static SDValue LowerCONCAT_VECTORS(SDValue Op, | |||
11090 | const X86Subtarget &Subtarget, | |||
11091 | SelectionDAG &DAG) { | |||
11092 | MVT VT = Op.getSimpleValueType(); | |||
11093 | if (VT.getVectorElementType() == MVT::i1) | |||
11094 | return LowerCONCAT_VECTORSvXi1(Op, Subtarget, DAG); | |||
11095 | ||||
11096 | assert((VT.is256BitVector() && Op.getNumOperands() == 2) ||(static_cast <bool> ((VT.is256BitVector() && Op .getNumOperands() == 2) || (VT.is512BitVector() && (Op .getNumOperands() == 2 || Op.getNumOperands() == 4))) ? void ( 0) : __assert_fail ("(VT.is256BitVector() && Op.getNumOperands() == 2) || (VT.is512BitVector() && (Op.getNumOperands() == 2 || Op.getNumOperands() == 4))" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11098, __extension__ __PRETTY_FUNCTION__)) | |||
11097 | (VT.is512BitVector() && (Op.getNumOperands() == 2 ||(static_cast <bool> ((VT.is256BitVector() && Op .getNumOperands() == 2) || (VT.is512BitVector() && (Op .getNumOperands() == 2 || Op.getNumOperands() == 4))) ? void ( 0) : __assert_fail ("(VT.is256BitVector() && Op.getNumOperands() == 2) || (VT.is512BitVector() && (Op.getNumOperands() == 2 || Op.getNumOperands() == 4))" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11098, __extension__ __PRETTY_FUNCTION__)) | |||
11098 | Op.getNumOperands() == 4)))(static_cast <bool> ((VT.is256BitVector() && Op .getNumOperands() == 2) || (VT.is512BitVector() && (Op .getNumOperands() == 2 || Op.getNumOperands() == 4))) ? void ( 0) : __assert_fail ("(VT.is256BitVector() && Op.getNumOperands() == 2) || (VT.is512BitVector() && (Op.getNumOperands() == 2 || Op.getNumOperands() == 4))" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11098, __extension__ __PRETTY_FUNCTION__)); | |||
11099 | ||||
11100 | // AVX can use the vinsertf128 instruction to create 256-bit vectors | |||
11101 | // from two other 128-bit ones. | |||
11102 | ||||
11103 | // 512-bit vector may contain 2 256-bit vectors or 4 128-bit vectors | |||
11104 | return LowerAVXCONCAT_VECTORS(Op, DAG, Subtarget); | |||
11105 | } | |||
11106 | ||||
11107 | //===----------------------------------------------------------------------===// | |||
11108 | // Vector shuffle lowering | |||
11109 | // | |||
11110 | // This is an experimental code path for lowering vector shuffles on x86. It is | |||
11111 | // designed to handle arbitrary vector shuffles and blends, gracefully | |||
11112 | // degrading performance as necessary. It works hard to recognize idiomatic | |||
11113 | // shuffles and lower them to optimal instruction patterns without leaving | |||
11114 | // a framework that allows reasonably efficient handling of all vector shuffle | |||
11115 | // patterns. | |||
11116 | //===----------------------------------------------------------------------===// | |||
11117 | ||||
11118 | /// Tiny helper function to identify a no-op mask. | |||
11119 | /// | |||
11120 | /// This is a somewhat boring predicate function. It checks whether the mask | |||
11121 | /// array input, which is assumed to be a single-input shuffle mask of the kind | |||
11122 | /// used by the X86 shuffle instructions (not a fully general | |||
11123 | /// ShuffleVectorSDNode mask) requires any shuffles to occur. Both undef and an | |||
11124 | /// in-place shuffle are 'no-op's. | |||
11125 | static bool isNoopShuffleMask(ArrayRef<int> Mask) { | |||
11126 | for (int i = 0, Size = Mask.size(); i < Size; ++i) { | |||
11127 | assert(Mask[i] >= -1 && "Out of bound mask element!")(static_cast <bool> (Mask[i] >= -1 && "Out of bound mask element!" ) ? void (0) : __assert_fail ("Mask[i] >= -1 && \"Out of bound mask element!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11127, __extension__ __PRETTY_FUNCTION__)); | |||
11128 | if (Mask[i] >= 0 && Mask[i] != i) | |||
11129 | return false; | |||
11130 | } | |||
11131 | return true; | |||
11132 | } | |||
11133 | ||||
11134 | /// Test whether there are elements crossing LaneSizeInBits lanes in this | |||
11135 | /// shuffle mask. | |||
11136 | /// | |||
11137 | /// X86 divides up its shuffles into in-lane and cross-lane shuffle operations | |||
11138 | /// and we routinely test for these. | |||
11139 | static bool isLaneCrossingShuffleMask(unsigned LaneSizeInBits, | |||
11140 | unsigned ScalarSizeInBits, | |||
11141 | ArrayRef<int> Mask) { | |||
11142 | assert(LaneSizeInBits && ScalarSizeInBits &&(static_cast <bool> (LaneSizeInBits && ScalarSizeInBits && (LaneSizeInBits % ScalarSizeInBits) == 0 && "Illegal shuffle lane size") ? void (0) : __assert_fail ("LaneSizeInBits && ScalarSizeInBits && (LaneSizeInBits % ScalarSizeInBits) == 0 && \"Illegal shuffle lane size\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11144, __extension__ __PRETTY_FUNCTION__)) | |||
11143 | (LaneSizeInBits % ScalarSizeInBits) == 0 &&(static_cast <bool> (LaneSizeInBits && ScalarSizeInBits && (LaneSizeInBits % ScalarSizeInBits) == 0 && "Illegal shuffle lane size") ? void (0) : __assert_fail ("LaneSizeInBits && ScalarSizeInBits && (LaneSizeInBits % ScalarSizeInBits) == 0 && \"Illegal shuffle lane size\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11144, __extension__ __PRETTY_FUNCTION__)) | |||
11144 | "Illegal shuffle lane size")(static_cast <bool> (LaneSizeInBits && ScalarSizeInBits && (LaneSizeInBits % ScalarSizeInBits) == 0 && "Illegal shuffle lane size") ? void (0) : __assert_fail ("LaneSizeInBits && ScalarSizeInBits && (LaneSizeInBits % ScalarSizeInBits) == 0 && \"Illegal shuffle lane size\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11144, __extension__ __PRETTY_FUNCTION__)); | |||
11145 | int LaneSize = LaneSizeInBits / ScalarSizeInBits; | |||
11146 | int Size = Mask.size(); | |||
11147 | for (int i = 0; i < Size; ++i) | |||
11148 | if (Mask[i] >= 0 && (Mask[i] % Size) / LaneSize != i / LaneSize) | |||
11149 | return true; | |||
11150 | return false; | |||
11151 | } | |||
11152 | ||||
11153 | /// Test whether there are elements crossing 128-bit lanes in this | |||
11154 | /// shuffle mask. | |||
11155 | static bool is128BitLaneCrossingShuffleMask(MVT VT, ArrayRef<int> Mask) { | |||
11156 | return isLaneCrossingShuffleMask(128, VT.getScalarSizeInBits(), Mask); | |||
11157 | } | |||
11158 | ||||
11159 | /// Test whether elements in each LaneSizeInBits lane in this shuffle mask come | |||
11160 | /// from multiple lanes - this is different to isLaneCrossingShuffleMask to | |||
11161 | /// better support 'repeated mask + lane permute' style shuffles. | |||
11162 | static bool isMultiLaneShuffleMask(unsigned LaneSizeInBits, | |||
11163 | unsigned ScalarSizeInBits, | |||
11164 | ArrayRef<int> Mask) { | |||
11165 | assert(LaneSizeInBits && ScalarSizeInBits &&(static_cast <bool> (LaneSizeInBits && ScalarSizeInBits && (LaneSizeInBits % ScalarSizeInBits) == 0 && "Illegal shuffle lane size") ? void (0) : __assert_fail ("LaneSizeInBits && ScalarSizeInBits && (LaneSizeInBits % ScalarSizeInBits) == 0 && \"Illegal shuffle lane size\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11167, __extension__ __PRETTY_FUNCTION__)) | |||
11166 | (LaneSizeInBits % ScalarSizeInBits) == 0 &&(static_cast <bool> (LaneSizeInBits && ScalarSizeInBits && (LaneSizeInBits % ScalarSizeInBits) == 0 && "Illegal shuffle lane size") ? void (0) : __assert_fail ("LaneSizeInBits && ScalarSizeInBits && (LaneSizeInBits % ScalarSizeInBits) == 0 && \"Illegal shuffle lane size\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11167, __extension__ __PRETTY_FUNCTION__)) | |||
11167 | "Illegal shuffle lane size")(static_cast <bool> (LaneSizeInBits && ScalarSizeInBits && (LaneSizeInBits % ScalarSizeInBits) == 0 && "Illegal shuffle lane size") ? void (0) : __assert_fail ("LaneSizeInBits && ScalarSizeInBits && (LaneSizeInBits % ScalarSizeInBits) == 0 && \"Illegal shuffle lane size\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11167, __extension__ __PRETTY_FUNCTION__)); | |||
11168 | int NumElts = Mask.size(); | |||
11169 | int NumEltsPerLane = LaneSizeInBits / ScalarSizeInBits; | |||
11170 | int NumLanes = NumElts / NumEltsPerLane; | |||
11171 | if (NumLanes > 1) { | |||
11172 | for (int i = 0; i != NumLanes; ++i) { | |||
11173 | int SrcLane = -1; | |||
11174 | for (int j = 0; j != NumEltsPerLane; ++j) { | |||
11175 | int M = Mask[(i * NumEltsPerLane) + j]; | |||
11176 | if (M < 0) | |||
11177 | continue; | |||
11178 | int Lane = (M % NumElts) / NumEltsPerLane; | |||
11179 | if (SrcLane >= 0 && SrcLane != Lane) | |||
11180 | return true; | |||
11181 | SrcLane = Lane; | |||
11182 | } | |||
11183 | } | |||
11184 | } | |||
11185 | return false; | |||
11186 | } | |||
11187 | ||||
11188 | /// Test whether a shuffle mask is equivalent within each sub-lane. | |||
11189 | /// | |||
11190 | /// This checks a shuffle mask to see if it is performing the same | |||
11191 | /// lane-relative shuffle in each sub-lane. This trivially implies | |||
11192 | /// that it is also not lane-crossing. It may however involve a blend from the | |||
11193 | /// same lane of a second vector. | |||
11194 | /// | |||
11195 | /// The specific repeated shuffle mask is populated in \p RepeatedMask, as it is | |||
11196 | /// non-trivial to compute in the face of undef lanes. The representation is | |||
11197 | /// suitable for use with existing 128-bit shuffles as entries from the second | |||
11198 | /// vector have been remapped to [LaneSize, 2*LaneSize). | |||
11199 | static bool isRepeatedShuffleMask(unsigned LaneSizeInBits, MVT VT, | |||
11200 | ArrayRef<int> Mask, | |||
11201 | SmallVectorImpl<int> &RepeatedMask) { | |||
11202 | auto LaneSize = LaneSizeInBits / VT.getScalarSizeInBits(); | |||
11203 | RepeatedMask.assign(LaneSize, -1); | |||
11204 | int Size = Mask.size(); | |||
11205 | for (int i = 0; i < Size; ++i) { | |||
11206 | assert(Mask[i] == SM_SentinelUndef || Mask[i] >= 0)(static_cast <bool> (Mask[i] == SM_SentinelUndef || Mask [i] >= 0) ? void (0) : __assert_fail ("Mask[i] == SM_SentinelUndef || Mask[i] >= 0" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11206, __extension__ __PRETTY_FUNCTION__)); | |||
11207 | if (Mask[i] < 0) | |||
11208 | continue; | |||
11209 | if ((Mask[i] % Size) / LaneSize != i / LaneSize) | |||
11210 | // This entry crosses lanes, so there is no way to model this shuffle. | |||
11211 | return false; | |||
11212 | ||||
11213 | // Ok, handle the in-lane shuffles by detecting if and when they repeat. | |||
11214 | // Adjust second vector indices to start at LaneSize instead of Size. | |||
11215 | int LocalM = Mask[i] < Size ? Mask[i] % LaneSize | |||
11216 | : Mask[i] % LaneSize + LaneSize; | |||
11217 | if (RepeatedMask[i % LaneSize] < 0) | |||
11218 | // This is the first non-undef entry in this slot of a 128-bit lane. | |||
11219 | RepeatedMask[i % LaneSize] = LocalM; | |||
11220 | else if (RepeatedMask[i % LaneSize] != LocalM) | |||
11221 | // Found a mismatch with the repeated mask. | |||
11222 | return false; | |||
11223 | } | |||
11224 | return true; | |||
11225 | } | |||
11226 | ||||
11227 | /// Test whether a shuffle mask is equivalent within each 128-bit lane. | |||
11228 | static bool | |||
11229 | is128BitLaneRepeatedShuffleMask(MVT VT, ArrayRef<int> Mask, | |||
11230 | SmallVectorImpl<int> &RepeatedMask) { | |||
11231 | return isRepeatedShuffleMask(128, VT, Mask, RepeatedMask); | |||
11232 | } | |||
11233 | ||||
11234 | static bool | |||
11235 | is128BitLaneRepeatedShuffleMask(MVT VT, ArrayRef<int> Mask) { | |||
11236 | SmallVector<int, 32> RepeatedMask; | |||
11237 | return isRepeatedShuffleMask(128, VT, Mask, RepeatedMask); | |||
11238 | } | |||
11239 | ||||
11240 | /// Test whether a shuffle mask is equivalent within each 256-bit lane. | |||
11241 | static bool | |||
11242 | is256BitLaneRepeatedShuffleMask(MVT VT, ArrayRef<int> Mask, | |||
11243 | SmallVectorImpl<int> &RepeatedMask) { | |||
11244 | return isRepeatedShuffleMask(256, VT, Mask, RepeatedMask); | |||
11245 | } | |||
11246 | ||||
11247 | /// Test whether a target shuffle mask is equivalent within each sub-lane. | |||
11248 | /// Unlike isRepeatedShuffleMask we must respect SM_SentinelZero. | |||
11249 | static bool isRepeatedTargetShuffleMask(unsigned LaneSizeInBits, | |||
11250 | unsigned EltSizeInBits, | |||
11251 | ArrayRef<int> Mask, | |||
11252 | SmallVectorImpl<int> &RepeatedMask) { | |||
11253 | int LaneSize = LaneSizeInBits / EltSizeInBits; | |||
11254 | RepeatedMask.assign(LaneSize, SM_SentinelUndef); | |||
11255 | int Size = Mask.size(); | |||
11256 | for (int i = 0; i < Size; ++i) { | |||
11257 | assert(isUndefOrZero(Mask[i]) || (Mask[i] >= 0))(static_cast <bool> (isUndefOrZero(Mask[i]) || (Mask[i] >= 0)) ? void (0) : __assert_fail ("isUndefOrZero(Mask[i]) || (Mask[i] >= 0)" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11257, __extension__ __PRETTY_FUNCTION__)); | |||
11258 | if (Mask[i] == SM_SentinelUndef) | |||
11259 | continue; | |||
11260 | if (Mask[i] == SM_SentinelZero) { | |||
11261 | if (!isUndefOrZero(RepeatedMask[i % LaneSize])) | |||
11262 | return false; | |||
11263 | RepeatedMask[i % LaneSize] = SM_SentinelZero; | |||
11264 | continue; | |||
11265 | } | |||
11266 | if ((Mask[i] % Size) / LaneSize != i / LaneSize) | |||
11267 | // This entry crosses lanes, so there is no way to model this shuffle. | |||
11268 | return false; | |||
11269 | ||||
11270 | // Handle the in-lane shuffles by detecting if and when they repeat. Adjust | |||
11271 | // later vector indices to start at multiples of LaneSize instead of Size. | |||
11272 | int LaneM = Mask[i] / Size; | |||
11273 | int LocalM = (Mask[i] % LaneSize) + (LaneM * LaneSize); | |||
11274 | if (RepeatedMask[i % LaneSize] == SM_SentinelUndef) | |||
11275 | // This is the first non-undef entry in this slot of a 128-bit lane. | |||
11276 | RepeatedMask[i % LaneSize] = LocalM; | |||
11277 | else if (RepeatedMask[i % LaneSize] != LocalM) | |||
11278 | // Found a mismatch with the repeated mask. | |||
11279 | return false; | |||
11280 | } | |||
11281 | return true; | |||
11282 | } | |||
11283 | ||||
11284 | /// Test whether a target shuffle mask is equivalent within each sub-lane. | |||
11285 | /// Unlike isRepeatedShuffleMask we must respect SM_SentinelZero. | |||
11286 | static bool isRepeatedTargetShuffleMask(unsigned LaneSizeInBits, MVT VT, | |||
11287 | ArrayRef<int> Mask, | |||
11288 | SmallVectorImpl<int> &RepeatedMask) { | |||
11289 | return isRepeatedTargetShuffleMask(LaneSizeInBits, VT.getScalarSizeInBits(), | |||
11290 | Mask, RepeatedMask); | |||
11291 | } | |||
11292 | ||||
11293 | /// Checks whether the vector elements referenced by two shuffle masks are | |||
11294 | /// equivalent. | |||
11295 | static bool IsElementEquivalent(int MaskSize, SDValue Op, SDValue ExpectedOp, | |||
11296 | int Idx, int ExpectedIdx) { | |||
11297 | assert(0 <= Idx && Idx < MaskSize && 0 <= ExpectedIdx &&(static_cast <bool> (0 <= Idx && Idx < MaskSize && 0 <= ExpectedIdx && ExpectedIdx < MaskSize && "Out of range element index") ? void (0) : __assert_fail ("0 <= Idx && Idx < MaskSize && 0 <= ExpectedIdx && ExpectedIdx < MaskSize && \"Out of range element index\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11298, __extension__ __PRETTY_FUNCTION__)) | |||
11298 | ExpectedIdx < MaskSize && "Out of range element index")(static_cast <bool> (0 <= Idx && Idx < MaskSize && 0 <= ExpectedIdx && ExpectedIdx < MaskSize && "Out of range element index") ? void (0) : __assert_fail ("0 <= Idx && Idx < MaskSize && 0 <= ExpectedIdx && ExpectedIdx < MaskSize && \"Out of range element index\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11298, __extension__ __PRETTY_FUNCTION__)); | |||
11299 | if (!Op || !ExpectedOp || Op.getOpcode() != ExpectedOp.getOpcode()) | |||
11300 | return false; | |||
11301 | ||||
11302 | switch (Op.getOpcode()) { | |||
11303 | case ISD::BUILD_VECTOR: | |||
11304 | // If the values are build vectors, we can look through them to find | |||
11305 | // equivalent inputs that make the shuffles equivalent. | |||
11306 | // TODO: Handle MaskSize != Op.getNumOperands()? | |||
11307 | if (MaskSize == (int)Op.getNumOperands() && | |||
11308 | MaskSize == (int)ExpectedOp.getNumOperands()) | |||
11309 | return Op.getOperand(Idx) == ExpectedOp.getOperand(ExpectedIdx); | |||
11310 | break; | |||
11311 | case X86ISD::VBROADCAST: | |||
11312 | case X86ISD::VBROADCAST_LOAD: | |||
11313 | // TODO: Handle MaskSize != Op.getValueType().getVectorNumElements()? | |||
11314 | return (Op == ExpectedOp && | |||
11315 | (int)Op.getValueType().getVectorNumElements() == MaskSize); | |||
11316 | case X86ISD::HADD: | |||
11317 | case X86ISD::HSUB: | |||
11318 | case X86ISD::FHADD: | |||
11319 | case X86ISD::FHSUB: | |||
11320 | case X86ISD::PACKSS: | |||
11321 | case X86ISD::PACKUS: | |||
11322 | // HOP(X,X) can refer to the elt from the lower/upper half of a lane. | |||
11323 | // TODO: Handle MaskSize != NumElts? | |||
11324 | // TODO: Handle HOP(X,Y) vs HOP(Y,X) equivalence cases. | |||
11325 | if (Op == ExpectedOp && Op.getOperand(0) == Op.getOperand(1)) { | |||
11326 | MVT VT = Op.getSimpleValueType(); | |||
11327 | int NumElts = VT.getVectorNumElements(); | |||
11328 | if (MaskSize == NumElts) { | |||
11329 | int NumLanes = VT.getSizeInBits() / 128; | |||
11330 | int NumEltsPerLane = NumElts / NumLanes; | |||
11331 | int NumHalfEltsPerLane = NumEltsPerLane / 2; | |||
11332 | bool SameLane = | |||
11333 | (Idx / NumEltsPerLane) == (ExpectedIdx / NumEltsPerLane); | |||
11334 | bool SameElt = | |||
11335 | (Idx % NumHalfEltsPerLane) == (ExpectedIdx % NumHalfEltsPerLane); | |||
11336 | return SameLane && SameElt; | |||
11337 | } | |||
11338 | } | |||
11339 | break; | |||
11340 | } | |||
11341 | ||||
11342 | return false; | |||
11343 | } | |||
11344 | ||||
11345 | /// Checks whether a shuffle mask is equivalent to an explicit list of | |||
11346 | /// arguments. | |||
11347 | /// | |||
11348 | /// This is a fast way to test a shuffle mask against a fixed pattern: | |||
11349 | /// | |||
11350 | /// if (isShuffleEquivalent(Mask, 3, 2, {1, 0})) { ... } | |||
11351 | /// | |||
11352 | /// It returns true if the mask is exactly as wide as the argument list, and | |||
11353 | /// each element of the mask is either -1 (signifying undef) or the value given | |||
11354 | /// in the argument. | |||
11355 | static bool isShuffleEquivalent(ArrayRef<int> Mask, ArrayRef<int> ExpectedMask, | |||
11356 | SDValue V1 = SDValue(), | |||
11357 | SDValue V2 = SDValue()) { | |||
11358 | int Size = Mask.size(); | |||
11359 | if (Size != (int)ExpectedMask.size()) | |||
11360 | return false; | |||
11361 | ||||
11362 | for (int i = 0; i < Size; ++i) { | |||
11363 | assert(Mask[i] >= -1 && "Out of bound mask element!")(static_cast <bool> (Mask[i] >= -1 && "Out of bound mask element!" ) ? void (0) : __assert_fail ("Mask[i] >= -1 && \"Out of bound mask element!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11363, __extension__ __PRETTY_FUNCTION__)); | |||
11364 | int MaskIdx = Mask[i]; | |||
11365 | int ExpectedIdx = ExpectedMask[i]; | |||
11366 | if (0 <= MaskIdx && MaskIdx != ExpectedIdx) { | |||
11367 | SDValue MaskV = MaskIdx < Size ? V1 : V2; | |||
11368 | SDValue ExpectedV = ExpectedIdx < Size ? V1 : V2; | |||
11369 | MaskIdx = MaskIdx < Size ? MaskIdx : (MaskIdx - Size); | |||
11370 | ExpectedIdx = ExpectedIdx < Size ? ExpectedIdx : (ExpectedIdx - Size); | |||
11371 | if (!IsElementEquivalent(Size, MaskV, ExpectedV, MaskIdx, ExpectedIdx)) | |||
11372 | return false; | |||
11373 | } | |||
11374 | } | |||
11375 | return true; | |||
11376 | } | |||
11377 | ||||
11378 | /// Checks whether a target shuffle mask is equivalent to an explicit pattern. | |||
11379 | /// | |||
11380 | /// The masks must be exactly the same width. | |||
11381 | /// | |||
11382 | /// If an element in Mask matches SM_SentinelUndef (-1) then the corresponding | |||
11383 | /// value in ExpectedMask is always accepted. Otherwise the indices must match. | |||
11384 | /// | |||
11385 | /// SM_SentinelZero is accepted as a valid negative index but must match in | |||
11386 | /// both. | |||
11387 | static bool isTargetShuffleEquivalent(MVT VT, ArrayRef<int> Mask, | |||
11388 | ArrayRef<int> ExpectedMask, | |||
11389 | SDValue V1 = SDValue(), | |||
11390 | SDValue V2 = SDValue()) { | |||
11391 | int Size = Mask.size(); | |||
11392 | if (Size != (int)ExpectedMask.size()) | |||
11393 | return false; | |||
11394 | assert(isUndefOrZeroOrInRange(ExpectedMask, 0, 2 * Size) &&(static_cast <bool> (isUndefOrZeroOrInRange(ExpectedMask , 0, 2 * Size) && "Illegal target shuffle mask") ? void (0) : __assert_fail ("isUndefOrZeroOrInRange(ExpectedMask, 0, 2 * Size) && \"Illegal target shuffle mask\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11395, __extension__ __PRETTY_FUNCTION__)) | |||
11395 | "Illegal target shuffle mask")(static_cast <bool> (isUndefOrZeroOrInRange(ExpectedMask , 0, 2 * Size) && "Illegal target shuffle mask") ? void (0) : __assert_fail ("isUndefOrZeroOrInRange(ExpectedMask, 0, 2 * Size) && \"Illegal target shuffle mask\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11395, __extension__ __PRETTY_FUNCTION__)); | |||
11396 | ||||
11397 | // Check for out-of-range target shuffle mask indices. | |||
11398 | if (!isUndefOrZeroOrInRange(Mask, 0, 2 * Size)) | |||
11399 | return false; | |||
11400 | ||||
11401 | // Don't use V1/V2 if they're not the same size as the shuffle mask type. | |||
11402 | if (V1 && V1.getValueSizeInBits() != VT.getSizeInBits()) | |||
11403 | V1 = SDValue(); | |||
11404 | if (V2 && V2.getValueSizeInBits() != VT.getSizeInBits()) | |||
11405 | V2 = SDValue(); | |||
11406 | ||||
11407 | for (int i = 0; i < Size; ++i) { | |||
11408 | int MaskIdx = Mask[i]; | |||
11409 | int ExpectedIdx = ExpectedMask[i]; | |||
11410 | if (MaskIdx == SM_SentinelUndef || MaskIdx == ExpectedIdx) | |||
11411 | continue; | |||
11412 | if (0 <= MaskIdx && 0 <= ExpectedIdx) { | |||
11413 | SDValue MaskV = MaskIdx < Size ? V1 : V2; | |||
11414 | SDValue ExpectedV = ExpectedIdx < Size ? V1 : V2; | |||
11415 | MaskIdx = MaskIdx < Size ? MaskIdx : (MaskIdx - Size); | |||
11416 | ExpectedIdx = ExpectedIdx < Size ? ExpectedIdx : (ExpectedIdx - Size); | |||
11417 | if (IsElementEquivalent(Size, MaskV, ExpectedV, MaskIdx, ExpectedIdx)) | |||
11418 | continue; | |||
11419 | } | |||
11420 | // TODO - handle SM_Sentinel equivalences. | |||
11421 | return false; | |||
11422 | } | |||
11423 | return true; | |||
11424 | } | |||
11425 | ||||
11426 | // Attempt to create a shuffle mask from a VSELECT condition mask. | |||
11427 | static bool createShuffleMaskFromVSELECT(SmallVectorImpl<int> &Mask, | |||
11428 | SDValue Cond) { | |||
11429 | EVT CondVT = Cond.getValueType(); | |||
11430 | unsigned EltSizeInBits = CondVT.getScalarSizeInBits(); | |||
11431 | unsigned NumElts = CondVT.getVectorNumElements(); | |||
11432 | ||||
11433 | APInt UndefElts; | |||
11434 | SmallVector<APInt, 32> EltBits; | |||
11435 | if (!getTargetConstantBitsFromNode(Cond, EltSizeInBits, UndefElts, EltBits, | |||
11436 | true, false)) | |||
11437 | return false; | |||
11438 | ||||
11439 | Mask.resize(NumElts, SM_SentinelUndef); | |||
11440 | ||||
11441 | for (int i = 0; i != (int)NumElts; ++i) { | |||
11442 | Mask[i] = i; | |||
11443 | // Arbitrarily choose from the 2nd operand if the select condition element | |||
11444 | // is undef. | |||
11445 | // TODO: Can we do better by matching patterns such as even/odd? | |||
11446 | if (UndefElts[i] || EltBits[i].isNullValue()) | |||
11447 | Mask[i] += NumElts; | |||
11448 | } | |||
11449 | ||||
11450 | return true; | |||
11451 | } | |||
11452 | ||||
11453 | // Check if the shuffle mask is suitable for the AVX vpunpcklwd or vpunpckhwd | |||
11454 | // instructions. | |||
11455 | static bool isUnpackWdShuffleMask(ArrayRef<int> Mask, MVT VT) { | |||
11456 | if (VT != MVT::v8i32 && VT != MVT::v8f32) | |||
11457 | return false; | |||
11458 | ||||
11459 | SmallVector<int, 8> Unpcklwd; | |||
11460 | createUnpackShuffleMask(MVT::v8i16, Unpcklwd, /* Lo = */ true, | |||
11461 | /* Unary = */ false); | |||
11462 | SmallVector<int, 8> Unpckhwd; | |||
11463 | createUnpackShuffleMask(MVT::v8i16, Unpckhwd, /* Lo = */ false, | |||
11464 | /* Unary = */ false); | |||
11465 | bool IsUnpackwdMask = (isTargetShuffleEquivalent(VT, Mask, Unpcklwd) || | |||
11466 | isTargetShuffleEquivalent(VT, Mask, Unpckhwd)); | |||
11467 | return IsUnpackwdMask; | |||
11468 | } | |||
11469 | ||||
11470 | static bool is128BitUnpackShuffleMask(ArrayRef<int> Mask) { | |||
11471 | // Create 128-bit vector type based on mask size. | |||
11472 | MVT EltVT = MVT::getIntegerVT(128 / Mask.size()); | |||
11473 | MVT VT = MVT::getVectorVT(EltVT, Mask.size()); | |||
11474 | ||||
11475 | // We can't assume a canonical shuffle mask, so try the commuted version too. | |||
11476 | SmallVector<int, 4> CommutedMask(Mask.begin(), Mask.end()); | |||
11477 | ShuffleVectorSDNode::commuteMask(CommutedMask); | |||
11478 | ||||
11479 | // Match any of unary/binary or low/high. | |||
11480 | for (unsigned i = 0; i != 4; ++i) { | |||
11481 | SmallVector<int, 16> UnpackMask; | |||
11482 | createUnpackShuffleMask(VT, UnpackMask, (i >> 1) % 2, i % 2); | |||
11483 | if (isTargetShuffleEquivalent(VT, Mask, UnpackMask) || | |||
11484 | isTargetShuffleEquivalent(VT, CommutedMask, UnpackMask)) | |||
11485 | return true; | |||
11486 | } | |||
11487 | return false; | |||
11488 | } | |||
11489 | ||||
11490 | /// Return true if a shuffle mask chooses elements identically in its top and | |||
11491 | /// bottom halves. For example, any splat mask has the same top and bottom | |||
11492 | /// halves. If an element is undefined in only one half of the mask, the halves | |||
11493 | /// are not considered identical. | |||
11494 | static bool hasIdenticalHalvesShuffleMask(ArrayRef<int> Mask) { | |||
11495 | assert(Mask.size() % 2 == 0 && "Expecting even number of elements in mask")(static_cast <bool> (Mask.size() % 2 == 0 && "Expecting even number of elements in mask" ) ? void (0) : __assert_fail ("Mask.size() % 2 == 0 && \"Expecting even number of elements in mask\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11495, __extension__ __PRETTY_FUNCTION__)); | |||
11496 | unsigned HalfSize = Mask.size() / 2; | |||
11497 | for (unsigned i = 0; i != HalfSize; ++i) { | |||
11498 | if (Mask[i] != Mask[i + HalfSize]) | |||
11499 | return false; | |||
11500 | } | |||
11501 | return true; | |||
11502 | } | |||
11503 | ||||
11504 | /// Get a 4-lane 8-bit shuffle immediate for a mask. | |||
11505 | /// | |||
11506 | /// This helper function produces an 8-bit shuffle immediate corresponding to | |||
11507 | /// the ubiquitous shuffle encoding scheme used in x86 instructions for | |||
11508 | /// shuffling 4 lanes. It can be used with most of the PSHUF instructions for | |||
11509 | /// example. | |||
11510 | /// | |||
11511 | /// NB: We rely heavily on "undef" masks preserving the input lane. | |||
11512 | static unsigned getV4X86ShuffleImm(ArrayRef<int> Mask) { | |||
11513 | assert(Mask.size() == 4 && "Only 4-lane shuffle masks")(static_cast <bool> (Mask.size() == 4 && "Only 4-lane shuffle masks" ) ? void (0) : __assert_fail ("Mask.size() == 4 && \"Only 4-lane shuffle masks\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11513, __extension__ __PRETTY_FUNCTION__)); | |||
11514 | assert(Mask[0] >= -1 && Mask[0] < 4 && "Out of bound mask element!")(static_cast <bool> (Mask[0] >= -1 && Mask[0 ] < 4 && "Out of bound mask element!") ? void (0) : __assert_fail ("Mask[0] >= -1 && Mask[0] < 4 && \"Out of bound mask element!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11514, __extension__ __PRETTY_FUNCTION__)); | |||
11515 | assert(Mask[1] >= -1 && Mask[1] < 4 && "Out of bound mask element!")(static_cast <bool> (Mask[1] >= -1 && Mask[1 ] < 4 && "Out of bound mask element!") ? void (0) : __assert_fail ("Mask[1] >= -1 && Mask[1] < 4 && \"Out of bound mask element!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11515, __extension__ __PRETTY_FUNCTION__)); | |||
11516 | assert(Mask[2] >= -1 && Mask[2] < 4 && "Out of bound mask element!")(static_cast <bool> (Mask[2] >= -1 && Mask[2 ] < 4 && "Out of bound mask element!") ? void (0) : __assert_fail ("Mask[2] >= -1 && Mask[2] < 4 && \"Out of bound mask element!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11516, __extension__ __PRETTY_FUNCTION__)); | |||
11517 | assert(Mask[3] >= -1 && Mask[3] < 4 && "Out of bound mask element!")(static_cast <bool> (Mask[3] >= -1 && Mask[3 ] < 4 && "Out of bound mask element!") ? void (0) : __assert_fail ("Mask[3] >= -1 && Mask[3] < 4 && \"Out of bound mask element!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11517, __extension__ __PRETTY_FUNCTION__)); | |||
11518 | ||||
11519 | // If the mask only uses one non-undef element, then fully 'splat' it to | |||
11520 | // improve later broadcast matching. | |||
11521 | int FirstIndex = find_if(Mask, [](int M) { return M >= 0; }) - Mask.begin(); | |||
11522 | assert(0 <= FirstIndex && FirstIndex < 4 && "All undef shuffle mask")(static_cast <bool> (0 <= FirstIndex && FirstIndex < 4 && "All undef shuffle mask") ? void (0) : __assert_fail ("0 <= FirstIndex && FirstIndex < 4 && \"All undef shuffle mask\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11522, __extension__ __PRETTY_FUNCTION__)); | |||
11523 | ||||
11524 | int FirstElt = Mask[FirstIndex]; | |||
11525 | if (all_of(Mask, [FirstElt](int M) { return M < 0 || M == FirstElt; })) | |||
11526 | return (FirstElt << 6) | (FirstElt << 4) | (FirstElt << 2) | FirstElt; | |||
11527 | ||||
11528 | unsigned Imm = 0; | |||
11529 | Imm |= (Mask[0] < 0 ? 0 : Mask[0]) << 0; | |||
11530 | Imm |= (Mask[1] < 0 ? 1 : Mask[1]) << 2; | |||
11531 | Imm |= (Mask[2] < 0 ? 2 : Mask[2]) << 4; | |||
11532 | Imm |= (Mask[3] < 0 ? 3 : Mask[3]) << 6; | |||
11533 | return Imm; | |||
11534 | } | |||
11535 | ||||
11536 | static SDValue getV4X86ShuffleImm8ForMask(ArrayRef<int> Mask, const SDLoc &DL, | |||
11537 | SelectionDAG &DAG) { | |||
11538 | return DAG.getTargetConstant(getV4X86ShuffleImm(Mask), DL, MVT::i8); | |||
11539 | } | |||
11540 | ||||
11541 | // The Shuffle result is as follow: | |||
11542 | // 0*a[0]0*a[1]...0*a[n] , n >=0 where a[] elements in a ascending order. | |||
11543 | // Each Zeroable's element correspond to a particular Mask's element. | |||
11544 | // As described in computeZeroableShuffleElements function. | |||
11545 | // | |||
11546 | // The function looks for a sub-mask that the nonzero elements are in | |||
11547 | // increasing order. If such sub-mask exist. The function returns true. | |||
11548 | static bool isNonZeroElementsInOrder(const APInt &Zeroable, | |||
11549 | ArrayRef<int> Mask, const EVT &VectorType, | |||
11550 | bool &IsZeroSideLeft) { | |||
11551 | int NextElement = -1; | |||
11552 | // Check if the Mask's nonzero elements are in increasing order. | |||
11553 | for (int i = 0, e = Mask.size(); i < e; i++) { | |||
11554 | // Checks if the mask's zeros elements are built from only zeros. | |||
11555 | assert(Mask[i] >= -1 && "Out of bound mask element!")(static_cast <bool> (Mask[i] >= -1 && "Out of bound mask element!" ) ? void (0) : __assert_fail ("Mask[i] >= -1 && \"Out of bound mask element!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11555, __extension__ __PRETTY_FUNCTION__)); | |||
11556 | if (Mask[i] < 0) | |||
11557 | return false; | |||
11558 | if (Zeroable[i]) | |||
11559 | continue; | |||
11560 | // Find the lowest non zero element | |||
11561 | if (NextElement < 0) { | |||
11562 | NextElement = Mask[i] != 0 ? VectorType.getVectorNumElements() : 0; | |||
11563 | IsZeroSideLeft = NextElement != 0; | |||
11564 | } | |||
11565 | // Exit if the mask's non zero elements are not in increasing order. | |||
11566 | if (NextElement != Mask[i]) | |||
11567 | return false; | |||
11568 | NextElement++; | |||
11569 | } | |||
11570 | return true; | |||
11571 | } | |||
11572 | ||||
11573 | /// Try to lower a shuffle with a single PSHUFB of V1 or V2. | |||
11574 | static SDValue lowerShuffleWithPSHUFB(const SDLoc &DL, MVT VT, | |||
11575 | ArrayRef<int> Mask, SDValue V1, | |||
11576 | SDValue V2, const APInt &Zeroable, | |||
11577 | const X86Subtarget &Subtarget, | |||
11578 | SelectionDAG &DAG) { | |||
11579 | int Size = Mask.size(); | |||
11580 | int LaneSize = 128 / VT.getScalarSizeInBits(); | |||
11581 | const int NumBytes = VT.getSizeInBits() / 8; | |||
11582 | const int NumEltBytes = VT.getScalarSizeInBits() / 8; | |||
11583 | ||||
11584 | assert((Subtarget.hasSSSE3() && VT.is128BitVector()) ||(static_cast <bool> ((Subtarget.hasSSSE3() && VT .is128BitVector()) || (Subtarget.hasAVX2() && VT.is256BitVector ()) || (Subtarget.hasBWI() && VT.is512BitVector())) ? void (0) : __assert_fail ("(Subtarget.hasSSSE3() && VT.is128BitVector()) || (Subtarget.hasAVX2() && VT.is256BitVector()) || (Subtarget.hasBWI() && VT.is512BitVector())" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11586, __extension__ __PRETTY_FUNCTION__)) | |||
11585 | (Subtarget.hasAVX2() && VT.is256BitVector()) ||(static_cast <bool> ((Subtarget.hasSSSE3() && VT .is128BitVector()) || (Subtarget.hasAVX2() && VT.is256BitVector ()) || (Subtarget.hasBWI() && VT.is512BitVector())) ? void (0) : __assert_fail ("(Subtarget.hasSSSE3() && VT.is128BitVector()) || (Subtarget.hasAVX2() && VT.is256BitVector()) || (Subtarget.hasBWI() && VT.is512BitVector())" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11586, __extension__ __PRETTY_FUNCTION__)) | |||
11586 | (Subtarget.hasBWI() && VT.is512BitVector()))(static_cast <bool> ((Subtarget.hasSSSE3() && VT .is128BitVector()) || (Subtarget.hasAVX2() && VT.is256BitVector ()) || (Subtarget.hasBWI() && VT.is512BitVector())) ? void (0) : __assert_fail ("(Subtarget.hasSSSE3() && VT.is128BitVector()) || (Subtarget.hasAVX2() && VT.is256BitVector()) || (Subtarget.hasBWI() && VT.is512BitVector())" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11586, __extension__ __PRETTY_FUNCTION__)); | |||
11587 | ||||
11588 | SmallVector<SDValue, 64> PSHUFBMask(NumBytes); | |||
11589 | // Sign bit set in i8 mask means zero element. | |||
11590 | SDValue ZeroMask = DAG.getConstant(0x80, DL, MVT::i8); | |||
11591 | ||||
11592 | SDValue V; | |||
11593 | for (int i = 0; i < NumBytes; ++i) { | |||
11594 | int M = Mask[i / NumEltBytes]; | |||
11595 | if (M < 0) { | |||
11596 | PSHUFBMask[i] = DAG.getUNDEF(MVT::i8); | |||
11597 | continue; | |||
11598 | } | |||
11599 | if (Zeroable[i / NumEltBytes]) { | |||
11600 | PSHUFBMask[i] = ZeroMask; | |||
11601 | continue; | |||
11602 | } | |||
11603 | ||||
11604 | // We can only use a single input of V1 or V2. | |||
11605 | SDValue SrcV = (M >= Size ? V2 : V1); | |||
11606 | if (V && V != SrcV) | |||
11607 | return SDValue(); | |||
11608 | V = SrcV; | |||
11609 | M %= Size; | |||
11610 | ||||
11611 | // PSHUFB can't cross lanes, ensure this doesn't happen. | |||
11612 | if ((M / LaneSize) != ((i / NumEltBytes) / LaneSize)) | |||
11613 | return SDValue(); | |||
11614 | ||||
11615 | M = M % LaneSize; | |||
11616 | M = M * NumEltBytes + (i % NumEltBytes); | |||
11617 | PSHUFBMask[i] = DAG.getConstant(M, DL, MVT::i8); | |||
11618 | } | |||
11619 | assert(V && "Failed to find a source input")(static_cast <bool> (V && "Failed to find a source input" ) ? void (0) : __assert_fail ("V && \"Failed to find a source input\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11619, __extension__ __PRETTY_FUNCTION__)); | |||
11620 | ||||
11621 | MVT I8VT = MVT::getVectorVT(MVT::i8, NumBytes); | |||
11622 | return DAG.getBitcast( | |||
11623 | VT, DAG.getNode(X86ISD::PSHUFB, DL, I8VT, DAG.getBitcast(I8VT, V), | |||
11624 | DAG.getBuildVector(I8VT, DL, PSHUFBMask))); | |||
11625 | } | |||
11626 | ||||
11627 | static SDValue getMaskNode(SDValue Mask, MVT MaskVT, | |||
11628 | const X86Subtarget &Subtarget, SelectionDAG &DAG, | |||
11629 | const SDLoc &dl); | |||
11630 | ||||
11631 | // X86 has dedicated shuffle that can be lowered to VEXPAND | |||
11632 | static SDValue lowerShuffleToEXPAND(const SDLoc &DL, MVT VT, | |||
11633 | const APInt &Zeroable, | |||
11634 | ArrayRef<int> Mask, SDValue &V1, | |||
11635 | SDValue &V2, SelectionDAG &DAG, | |||
11636 | const X86Subtarget &Subtarget) { | |||
11637 | bool IsLeftZeroSide = true; | |||
11638 | if (!isNonZeroElementsInOrder(Zeroable, Mask, V1.getValueType(), | |||
11639 | IsLeftZeroSide)) | |||
11640 | return SDValue(); | |||
11641 | unsigned VEXPANDMask = (~Zeroable).getZExtValue(); | |||
11642 | MVT IntegerType = | |||
11643 | MVT::getIntegerVT(std::max((int)VT.getVectorNumElements(), 8)); | |||
11644 | SDValue MaskNode = DAG.getConstant(VEXPANDMask, DL, IntegerType); | |||
11645 | unsigned NumElts = VT.getVectorNumElements(); | |||
11646 | assert((NumElts == 4 || NumElts == 8 || NumElts == 16) &&(static_cast <bool> ((NumElts == 4 || NumElts == 8 || NumElts == 16) && "Unexpected number of vector elements") ? void (0) : __assert_fail ("(NumElts == 4 || NumElts == 8 || NumElts == 16) && \"Unexpected number of vector elements\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11647, __extension__ __PRETTY_FUNCTION__)) | |||
11647 | "Unexpected number of vector elements")(static_cast <bool> ((NumElts == 4 || NumElts == 8 || NumElts == 16) && "Unexpected number of vector elements") ? void (0) : __assert_fail ("(NumElts == 4 || NumElts == 8 || NumElts == 16) && \"Unexpected number of vector elements\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11647, __extension__ __PRETTY_FUNCTION__)); | |||
11648 | SDValue VMask = getMaskNode(MaskNode, MVT::getVectorVT(MVT::i1, NumElts), | |||
11649 | Subtarget, DAG, DL); | |||
11650 | SDValue ZeroVector = getZeroVector(VT, Subtarget, DAG, DL); | |||
11651 | SDValue ExpandedVector = IsLeftZeroSide ? V2 : V1; | |||
11652 | return DAG.getNode(X86ISD::EXPAND, DL, VT, ExpandedVector, ZeroVector, VMask); | |||
11653 | } | |||
11654 | ||||
11655 | static bool matchShuffleWithUNPCK(MVT VT, SDValue &V1, SDValue &V2, | |||
11656 | unsigned &UnpackOpcode, bool IsUnary, | |||
11657 | ArrayRef<int> TargetMask, const SDLoc &DL, | |||
11658 | SelectionDAG &DAG, | |||
11659 | const X86Subtarget &Subtarget) { | |||
11660 | int NumElts = VT.getVectorNumElements(); | |||
11661 | ||||
11662 | bool Undef1 = true, Undef2 = true, Zero1 = true, Zero2 = true; | |||
11663 | for (int i = 0; i != NumElts; i += 2) { | |||
11664 | int M1 = TargetMask[i + 0]; | |||
11665 | int M2 = TargetMask[i + 1]; | |||
11666 | Undef1 &= (SM_SentinelUndef == M1); | |||
11667 | Undef2 &= (SM_SentinelUndef == M2); | |||
11668 | Zero1 &= isUndefOrZero(M1); | |||
11669 | Zero2 &= isUndefOrZero(M2); | |||
11670 | } | |||
11671 | assert(!((Undef1 || Zero1) && (Undef2 || Zero2)) &&(static_cast <bool> (!((Undef1 || Zero1) && (Undef2 || Zero2)) && "Zeroable shuffle detected") ? void (0 ) : __assert_fail ("!((Undef1 || Zero1) && (Undef2 || Zero2)) && \"Zeroable shuffle detected\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11672, __extension__ __PRETTY_FUNCTION__)) | |||
11672 | "Zeroable shuffle detected")(static_cast <bool> (!((Undef1 || Zero1) && (Undef2 || Zero2)) && "Zeroable shuffle detected") ? void (0 ) : __assert_fail ("!((Undef1 || Zero1) && (Undef2 || Zero2)) && \"Zeroable shuffle detected\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11672, __extension__ __PRETTY_FUNCTION__)); | |||
11673 | ||||
11674 | // Attempt to match the target mask against the unpack lo/hi mask patterns. | |||
11675 | SmallVector<int, 64> Unpckl, Unpckh; | |||
11676 | createUnpackShuffleMask(VT, Unpckl, /* Lo = */ true, IsUnary); | |||
11677 | if (isTargetShuffleEquivalent(VT, TargetMask, Unpckl, V1, | |||
11678 | (IsUnary ? V1 : V2))) { | |||
11679 | UnpackOpcode = X86ISD::UNPCKL; | |||
11680 | V2 = (Undef2 ? DAG.getUNDEF(VT) : (IsUnary ? V1 : V2)); | |||
11681 | V1 = (Undef1 ? DAG.getUNDEF(VT) : V1); | |||
11682 | return true; | |||
11683 | } | |||
11684 | ||||
11685 | createUnpackShuffleMask(VT, Unpckh, /* Lo = */ false, IsUnary); | |||
11686 | if (isTargetShuffleEquivalent(VT, TargetMask, Unpckh, V1, | |||
11687 | (IsUnary ? V1 : V2))) { | |||
11688 | UnpackOpcode = X86ISD::UNPCKH; | |||
11689 | V2 = (Undef2 ? DAG.getUNDEF(VT) : (IsUnary ? V1 : V2)); | |||
11690 | V1 = (Undef1 ? DAG.getUNDEF(VT) : V1); | |||
11691 | return true; | |||
11692 | } | |||
11693 | ||||
11694 | // If an unary shuffle, attempt to match as an unpack lo/hi with zero. | |||
11695 | if (IsUnary && (Zero1 || Zero2)) { | |||
11696 | // Don't bother if we can blend instead. | |||
11697 | if ((Subtarget.hasSSE41() || VT == MVT::v2i64 || VT == MVT::v2f64) && | |||
11698 | isSequentialOrUndefOrZeroInRange(TargetMask, 0, NumElts, 0)) | |||
11699 | return false; | |||
11700 | ||||
11701 | bool MatchLo = true, MatchHi = true; | |||
11702 | for (int i = 0; (i != NumElts) && (MatchLo || MatchHi); ++i) { | |||
11703 | int M = TargetMask[i]; | |||
11704 | ||||
11705 | // Ignore if the input is known to be zero or the index is undef. | |||
11706 | if ((((i & 1) == 0) && Zero1) || (((i & 1) == 1) && Zero2) || | |||
11707 | (M == SM_SentinelUndef)) | |||
11708 | continue; | |||
11709 | ||||
11710 | MatchLo &= (M == Unpckl[i]); | |||
11711 | MatchHi &= (M == Unpckh[i]); | |||
11712 | } | |||
11713 | ||||
11714 | if (MatchLo || MatchHi) { | |||
11715 | UnpackOpcode = MatchLo ? X86ISD::UNPCKL : X86ISD::UNPCKH; | |||
11716 | V2 = Zero2 ? getZeroVector(VT, Subtarget, DAG, DL) : V1; | |||
11717 | V1 = Zero1 ? getZeroVector(VT, Subtarget, DAG, DL) : V1; | |||
11718 | return true; | |||
11719 | } | |||
11720 | } | |||
11721 | ||||
11722 | // If a binary shuffle, commute and try again. | |||
11723 | if (!IsUnary) { | |||
11724 | ShuffleVectorSDNode::commuteMask(Unpckl); | |||
11725 | if (isTargetShuffleEquivalent(VT, TargetMask, Unpckl)) { | |||
11726 | UnpackOpcode = X86ISD::UNPCKL; | |||
11727 | std::swap(V1, V2); | |||
11728 | return true; | |||
11729 | } | |||
11730 | ||||
11731 | ShuffleVectorSDNode::commuteMask(Unpckh); | |||
11732 | if (isTargetShuffleEquivalent(VT, TargetMask, Unpckh)) { | |||
11733 | UnpackOpcode = X86ISD::UNPCKH; | |||
11734 | std::swap(V1, V2); | |||
11735 | return true; | |||
11736 | } | |||
11737 | } | |||
11738 | ||||
11739 | return false; | |||
11740 | } | |||
11741 | ||||
11742 | // X86 has dedicated unpack instructions that can handle specific blend | |||
11743 | // operations: UNPCKH and UNPCKL. | |||
11744 | static SDValue lowerShuffleWithUNPCK(const SDLoc &DL, MVT VT, | |||
11745 | ArrayRef<int> Mask, SDValue V1, SDValue V2, | |||
11746 | SelectionDAG &DAG) { | |||
11747 | SmallVector<int, 8> Unpckl; | |||
11748 | createUnpackShuffleMask(VT, Unpckl, /* Lo = */ true, /* Unary = */ false); | |||
11749 | if (isShuffleEquivalent(Mask, Unpckl, V1, V2)) | |||
11750 | return DAG.getNode(X86ISD::UNPCKL, DL, VT, V1, V2); | |||
11751 | ||||
11752 | SmallVector<int, 8> Unpckh; | |||
11753 | createUnpackShuffleMask(VT, Unpckh, /* Lo = */ false, /* Unary = */ false); | |||
11754 | if (isShuffleEquivalent(Mask, Unpckh, V1, V2)) | |||
11755 | return DAG.getNode(X86ISD::UNPCKH, DL, VT, V1, V2); | |||
11756 | ||||
11757 | // Commute and try again. | |||
11758 | ShuffleVectorSDNode::commuteMask(Unpckl); | |||
11759 | if (isShuffleEquivalent(Mask, Unpckl, V1, V2)) | |||
11760 | return DAG.getNode(X86ISD::UNPCKL, DL, VT, V2, V1); | |||
11761 | ||||
11762 | ShuffleVectorSDNode::commuteMask(Unpckh); | |||
11763 | if (isShuffleEquivalent(Mask, Unpckh, V1, V2)) | |||
11764 | return DAG.getNode(X86ISD::UNPCKH, DL, VT, V2, V1); | |||
11765 | ||||
11766 | return SDValue(); | |||
11767 | } | |||
11768 | ||||
11769 | /// Check if the mask can be mapped to a preliminary shuffle (vperm 64-bit) | |||
11770 | /// followed by unpack 256-bit. | |||
11771 | static SDValue lowerShuffleWithUNPCK256(const SDLoc &DL, MVT VT, | |||
11772 | ArrayRef<int> Mask, SDValue V1, | |||
11773 | SDValue V2, SelectionDAG &DAG) { | |||
11774 | SmallVector<int, 32> Unpckl, Unpckh; | |||
11775 | createSplat2ShuffleMask(VT, Unpckl, /* Lo */ true); | |||
11776 | createSplat2ShuffleMask(VT, Unpckh, /* Lo */ false); | |||
11777 | ||||
11778 | unsigned UnpackOpcode; | |||
11779 | if (isShuffleEquivalent(Mask, Unpckl, V1, V2)) | |||
11780 | UnpackOpcode = X86ISD::UNPCKL; | |||
11781 | else if (isShuffleEquivalent(Mask, Unpckh, V1, V2)) | |||
11782 | UnpackOpcode = X86ISD::UNPCKH; | |||
11783 | else | |||
11784 | return SDValue(); | |||
11785 | ||||
11786 | // This is a "natural" unpack operation (rather than the 128-bit sectored | |||
11787 | // operation implemented by AVX). We need to rearrange 64-bit chunks of the | |||
11788 | // input in order to use the x86 instruction. | |||
11789 | V1 = DAG.getVectorShuffle(MVT::v4f64, DL, DAG.getBitcast(MVT::v4f64, V1), | |||
11790 | DAG.getUNDEF(MVT::v4f64), {0, 2, 1, 3}); | |||
11791 | V1 = DAG.getBitcast(VT, V1); | |||
11792 | return DAG.getNode(UnpackOpcode, DL, VT, V1, V1); | |||
11793 | } | |||
11794 | ||||
11795 | // Check if the mask can be mapped to a TRUNCATE or VTRUNC, truncating the | |||
11796 | // source into the lower elements and zeroing the upper elements. | |||
11797 | static bool matchShuffleAsVTRUNC(MVT &SrcVT, MVT &DstVT, MVT VT, | |||
11798 | ArrayRef<int> Mask, const APInt &Zeroable, | |||
11799 | const X86Subtarget &Subtarget) { | |||
11800 | if (!VT.is512BitVector() && !Subtarget.hasVLX()) | |||
11801 | return false; | |||
11802 | ||||
11803 | unsigned NumElts = Mask.size(); | |||
11804 | unsigned EltSizeInBits = VT.getScalarSizeInBits(); | |||
11805 | unsigned MaxScale = 64 / EltSizeInBits; | |||
11806 | ||||
11807 | for (unsigned Scale = 2; Scale <= MaxScale; Scale += Scale) { | |||
11808 | unsigned SrcEltBits = EltSizeInBits * Scale; | |||
11809 | if (SrcEltBits < 32 && !Subtarget.hasBWI()) | |||
11810 | continue; | |||
11811 | unsigned NumSrcElts = NumElts / Scale; | |||
11812 | if (!isSequentialOrUndefInRange(Mask, 0, NumSrcElts, 0, Scale)) | |||
11813 | continue; | |||
11814 | unsigned UpperElts = NumElts - NumSrcElts; | |||
11815 | if (!Zeroable.extractBits(UpperElts, NumSrcElts).isAllOnesValue()) | |||
11816 | continue; | |||
11817 | SrcVT = MVT::getIntegerVT(EltSizeInBits * Scale); | |||
11818 | SrcVT = MVT::getVectorVT(SrcVT, NumSrcElts); | |||
11819 | DstVT = MVT::getIntegerVT(EltSizeInBits); | |||
11820 | if ((NumSrcElts * EltSizeInBits) >= 128) { | |||
11821 | // ISD::TRUNCATE | |||
11822 | DstVT = MVT::getVectorVT(DstVT, NumSrcElts); | |||
11823 | } else { | |||
11824 | // X86ISD::VTRUNC | |||
11825 | DstVT = MVT::getVectorVT(DstVT, 128 / EltSizeInBits); | |||
11826 | } | |||
11827 | return true; | |||
11828 | } | |||
11829 | ||||
11830 | return false; | |||
11831 | } | |||
11832 | ||||
11833 | // Helper to create TRUNCATE/VTRUNC nodes, optionally with zero/undef upper | |||
11834 | // element padding to the final DstVT. | |||
11835 | static SDValue getAVX512TruncNode(const SDLoc &DL, MVT DstVT, SDValue Src, | |||
11836 | const X86Subtarget &Subtarget, | |||
11837 | SelectionDAG &DAG, bool ZeroUppers) { | |||
11838 | MVT SrcVT = Src.getSimpleValueType(); | |||
11839 | MVT DstSVT = DstVT.getScalarType(); | |||
11840 | unsigned NumDstElts = DstVT.getVectorNumElements(); | |||
11841 | unsigned NumSrcElts = SrcVT.getVectorNumElements(); | |||
11842 | unsigned DstEltSizeInBits = DstVT.getScalarSizeInBits(); | |||
11843 | ||||
11844 | if (!DAG.getTargetLoweringInfo().isTypeLegal(SrcVT)) | |||
11845 | return SDValue(); | |||
11846 | ||||
11847 | // Perform a direct ISD::TRUNCATE if possible. | |||
11848 | if (NumSrcElts == NumDstElts) | |||
11849 | return DAG.getNode(ISD::TRUNCATE, DL, DstVT, Src); | |||
11850 | ||||
11851 | if (NumSrcElts > NumDstElts) { | |||
11852 | MVT TruncVT = MVT::getVectorVT(DstSVT, NumSrcElts); | |||
11853 | SDValue Trunc = DAG.getNode(ISD::TRUNCATE, DL, TruncVT, Src); | |||
11854 | return extractSubVector(Trunc, 0, DAG, DL, DstVT.getSizeInBits()); | |||
11855 | } | |||
11856 | ||||
11857 | if ((NumSrcElts * DstEltSizeInBits) >= 128) { | |||
11858 | MVT TruncVT = MVT::getVectorVT(DstSVT, NumSrcElts); | |||
11859 | SDValue Trunc = DAG.getNode(ISD::TRUNCATE, DL, TruncVT, Src); | |||
11860 | return widenSubVector(Trunc, ZeroUppers, Subtarget, DAG, DL, | |||
11861 | DstVT.getSizeInBits()); | |||
11862 | } | |||
11863 | ||||
11864 | // Non-VLX targets must truncate from a 512-bit type, so we need to | |||
11865 | // widen, truncate and then possibly extract the original subvector. | |||
11866 | if (!Subtarget.hasVLX() && !SrcVT.is512BitVector()) { | |||
11867 | SDValue NewSrc = widenSubVector(Src, ZeroUppers, Subtarget, DAG, DL, 512); | |||
11868 | return getAVX512TruncNode(DL, DstVT, NewSrc, Subtarget, DAG, ZeroUppers); | |||
11869 | } | |||
11870 | ||||
11871 | // Fallback to a X86ISD::VTRUNC, padding if necessary. | |||
11872 | MVT TruncVT = MVT::getVectorVT(DstSVT, 128 / DstEltSizeInBits); | |||
11873 | SDValue Trunc = DAG.getNode(X86ISD::VTRUNC, DL, TruncVT, Src); | |||
11874 | if (DstVT != TruncVT) | |||
11875 | Trunc = widenSubVector(Trunc, ZeroUppers, Subtarget, DAG, DL, | |||
11876 | DstVT.getSizeInBits()); | |||
11877 | return Trunc; | |||
11878 | } | |||
11879 | ||||
11880 | // Try to lower trunc+vector_shuffle to a vpmovdb or a vpmovdw instruction. | |||
11881 | // | |||
11882 | // An example is the following: | |||
11883 | // | |||
11884 | // t0: ch = EntryToken | |||
11885 | // t2: v4i64,ch = CopyFromReg t0, Register:v4i64 %0 | |||
11886 | // t25: v4i32 = truncate t2 | |||
11887 | // t41: v8i16 = bitcast t25 | |||
11888 | // t21: v8i16 = BUILD_VECTOR undef:i16, undef:i16, undef:i16, undef:i16, | |||
11889 | // Constant:i16<0>, Constant:i16<0>, Constant:i16<0>, Constant:i16<0> | |||
11890 | // t51: v8i16 = vector_shuffle<0,2,4,6,12,13,14,15> t41, t21 | |||
11891 | // t18: v2i64 = bitcast t51 | |||
11892 | // | |||
11893 | // One can just use a single vpmovdw instruction, without avx512vl we need to | |||
11894 | // use the zmm variant and extract the lower subvector, padding with zeroes. | |||
11895 | // TODO: Merge with lowerShuffleAsVTRUNC. | |||
11896 | static SDValue lowerShuffleWithVPMOV(const SDLoc &DL, MVT VT, SDValue V1, | |||
11897 | SDValue V2, ArrayRef<int> Mask, | |||
11898 | const APInt &Zeroable, | |||
11899 | const X86Subtarget &Subtarget, | |||
11900 | SelectionDAG &DAG) { | |||
11901 | assert((VT == MVT::v16i8 || VT == MVT::v8i16) && "Unexpected VTRUNC type")(static_cast <bool> ((VT == MVT::v16i8 || VT == MVT::v8i16 ) && "Unexpected VTRUNC type") ? void (0) : __assert_fail ("(VT == MVT::v16i8 || VT == MVT::v8i16) && \"Unexpected VTRUNC type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11901, __extension__ __PRETTY_FUNCTION__)); | |||
11902 | if (!Subtarget.hasAVX512()) | |||
11903 | return SDValue(); | |||
11904 | ||||
11905 | unsigned NumElts = VT.getVectorNumElements(); | |||
11906 | unsigned EltSizeInBits = VT.getScalarSizeInBits(); | |||
11907 | unsigned MaxScale = 64 / EltSizeInBits; | |||
11908 | for (unsigned Scale = 2; Scale <= MaxScale; Scale += Scale) { | |||
11909 | unsigned NumSrcElts = NumElts / Scale; | |||
11910 | unsigned UpperElts = NumElts - NumSrcElts; | |||
11911 | if (!isSequentialOrUndefInRange(Mask, 0, NumSrcElts, 0, Scale) || | |||
11912 | !Zeroable.extractBits(UpperElts, NumSrcElts).isAllOnesValue()) | |||
11913 | continue; | |||
11914 | ||||
11915 | SDValue Src = V1; | |||
11916 | if (!Src.hasOneUse()) | |||
11917 | return SDValue(); | |||
11918 | ||||
11919 | Src = peekThroughOneUseBitcasts(Src); | |||
11920 | if (Src.getOpcode() != ISD::TRUNCATE || | |||
11921 | Src.getScalarValueSizeInBits() != (EltSizeInBits * Scale)) | |||
11922 | return SDValue(); | |||
11923 | Src = Src.getOperand(0); | |||
11924 | ||||
11925 | // VPMOVWB is only available with avx512bw. | |||
11926 | MVT SrcVT = Src.getSimpleValueType(); | |||
11927 | if (SrcVT.getVectorElementType() == MVT::i16 && VT == MVT::v16i8 && | |||
11928 | !Subtarget.hasBWI()) | |||
11929 | return SDValue(); | |||
11930 | ||||
11931 | bool UndefUppers = isUndefInRange(Mask, NumSrcElts, UpperElts); | |||
11932 | return getAVX512TruncNode(DL, VT, Src, Subtarget, DAG, !UndefUppers); | |||
11933 | } | |||
11934 | ||||
11935 | return SDValue(); | |||
11936 | } | |||
11937 | ||||
11938 | // Attempt to match binary shuffle patterns as a truncate. | |||
11939 | static SDValue lowerShuffleAsVTRUNC(const SDLoc &DL, MVT VT, SDValue V1, | |||
11940 | SDValue V2, ArrayRef<int> Mask, | |||
11941 | const APInt &Zeroable, | |||
11942 | const X86Subtarget &Subtarget, | |||
11943 | SelectionDAG &DAG) { | |||
11944 | assert((VT.is128BitVector() || VT.is256BitVector()) &&(static_cast <bool> ((VT.is128BitVector() || VT.is256BitVector ()) && "Unexpected VTRUNC type") ? void (0) : __assert_fail ("(VT.is128BitVector() || VT.is256BitVector()) && \"Unexpected VTRUNC type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11945, __extension__ __PRETTY_FUNCTION__)) | |||
11945 | "Unexpected VTRUNC type")(static_cast <bool> ((VT.is128BitVector() || VT.is256BitVector ()) && "Unexpected VTRUNC type") ? void (0) : __assert_fail ("(VT.is128BitVector() || VT.is256BitVector()) && \"Unexpected VTRUNC type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 11945, __extension__ __PRETTY_FUNCTION__)); | |||
11946 | if (!Subtarget.hasAVX512()) | |||
11947 | return SDValue(); | |||
11948 | ||||
11949 | unsigned NumElts = VT.getVectorNumElements(); | |||
11950 | unsigned EltSizeInBits = VT.getScalarSizeInBits(); | |||
11951 | unsigned MaxScale = 64 / EltSizeInBits; | |||
11952 | for (unsigned Scale = 2; Scale <= MaxScale; Scale += Scale) { | |||
11953 | // TODO: Support non-BWI VPMOVWB truncations? | |||
11954 | unsigned SrcEltBits = EltSizeInBits * Scale; | |||
11955 | if (SrcEltBits < 32 && !Subtarget.hasBWI()) | |||
11956 | continue; | |||
11957 | ||||
11958 | // Match shuffle <0,Scale,2*Scale,..,undef_or_zero,undef_or_zero,...> | |||
11959 | // Bail if the V2 elements are undef. | |||
11960 | unsigned NumHalfSrcElts = NumElts / Scale; | |||
11961 | unsigned NumSrcElts = 2 * NumHalfSrcElts; | |||
11962 | if (!isSequentialOrUndefInRange(Mask, 0, NumSrcElts, 0, Scale) || | |||
11963 | isUndefInRange(Mask, NumHalfSrcElts, NumHalfSrcElts)) | |||
11964 | continue; | |||
11965 | ||||
11966 | // The elements beyond the truncation must be undef/zero. | |||
11967 | unsigned UpperElts = NumElts - NumSrcElts; | |||
11968 | if (UpperElts > 0 && | |||
11969 | !Zeroable.extractBits(UpperElts, NumSrcElts).isAllOnesValue()) | |||
11970 | continue; | |||
11971 | bool UndefUppers = | |||
11972 | UpperElts > 0 && isUndefInRange(Mask, NumSrcElts, UpperElts); | |||
11973 | ||||
11974 | // As we're using both sources then we need to concat them together | |||
11975 | // and truncate from the double-sized src. | |||
11976 | MVT ConcatVT = MVT::getVectorVT(VT.getScalarType(), NumElts * 2); | |||
11977 | SDValue Src = DAG.getNode(ISD::CONCAT_VECTORS, DL, ConcatVT, V1, V2); | |||
11978 | ||||
11979 | MVT SrcSVT = MVT::getIntegerVT(SrcEltBits); | |||
11980 | MVT SrcVT = MVT::getVectorVT(SrcSVT, NumSrcElts); | |||
11981 | Src = DAG.getBitcast(SrcVT, Src); | |||
11982 | return getAVX512TruncNode(DL, VT, Src, Subtarget, DAG, !UndefUppers); | |||
11983 | } | |||
11984 | ||||
11985 | return SDValue(); | |||
11986 | } | |||
11987 | ||||
11988 | /// Check whether a compaction lowering can be done by dropping even | |||
11989 | /// elements and compute how many times even elements must be dropped. | |||
11990 | /// | |||
11991 | /// This handles shuffles which take every Nth element where N is a power of | |||
11992 | /// two. Example shuffle masks: | |||
11993 | /// | |||
11994 | /// N = 1: 0, 2, 4, 6, 8, 10, 12, 14, 0, 2, 4, 6, 8, 10, 12, 14 | |||
11995 | /// N = 1: 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30 | |||
11996 | /// N = 2: 0, 4, 8, 12, 0, 4, 8, 12, 0, 4, 8, 12, 0, 4, 8, 12 | |||
11997 | /// N = 2: 0, 4, 8, 12, 16, 20, 24, 28, 0, 4, 8, 12, 16, 20, 24, 28 | |||
11998 | /// N = 3: 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8 | |||
11999 | /// N = 3: 0, 8, 16, 24, 0, 8, 16, 24, 0, 8, 16, 24, 0, 8, 16, 24 | |||
12000 | /// | |||
12001 | /// Any of these lanes can of course be undef. | |||
12002 | /// | |||
12003 | /// This routine only supports N <= 3. | |||
12004 | /// FIXME: Evaluate whether either AVX or AVX-512 have any opportunities here | |||
12005 | /// for larger N. | |||
12006 | /// | |||
12007 | /// \returns N above, or the number of times even elements must be dropped if | |||
12008 | /// there is such a number. Otherwise returns zero. | |||
12009 | static int canLowerByDroppingEvenElements(ArrayRef<int> Mask, | |||
12010 | bool IsSingleInput) { | |||
12011 | // The modulus for the shuffle vector entries is based on whether this is | |||
12012 | // a single input or not. | |||
12013 | int ShuffleModulus = Mask.size() * (IsSingleInput ? 1 : 2); | |||
12014 | assert(isPowerOf2_32((uint32_t)ShuffleModulus) &&(static_cast <bool> (isPowerOf2_32((uint32_t)ShuffleModulus ) && "We should only be called with masks with a power-of-2 size!" ) ? void (0) : __assert_fail ("isPowerOf2_32((uint32_t)ShuffleModulus) && \"We should only be called with masks with a power-of-2 size!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 12015, __extension__ __PRETTY_FUNCTION__)) | |||
12015 | "We should only be called with masks with a power-of-2 size!")(static_cast <bool> (isPowerOf2_32((uint32_t)ShuffleModulus ) && "We should only be called with masks with a power-of-2 size!" ) ? void (0) : __assert_fail ("isPowerOf2_32((uint32_t)ShuffleModulus) && \"We should only be called with masks with a power-of-2 size!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 12015, __extension__ __PRETTY_FUNCTION__)); | |||
12016 | ||||
12017 | uint64_t ModMask = (uint64_t)ShuffleModulus - 1; | |||
12018 | ||||
12019 | // We track whether the input is viable for all power-of-2 strides 2^1, 2^2, | |||
12020 | // and 2^3 simultaneously. This is because we may have ambiguity with | |||
12021 | // partially undef inputs. | |||
12022 | bool ViableForN[3] = {true, true, true}; | |||
12023 | ||||
12024 | for (int i = 0, e = Mask.size(); i < e; ++i) { | |||
12025 | // Ignore undef lanes, we'll optimistically collapse them to the pattern we | |||
12026 | // want. | |||
12027 | if (Mask[i] < 0) | |||
12028 | continue; | |||
12029 | ||||
12030 | bool IsAnyViable = false; | |||
12031 | for (unsigned j = 0; j != array_lengthof(ViableForN); ++j) | |||
12032 | if (ViableForN[j]) { | |||
12033 | uint64_t N = j + 1; | |||
12034 | ||||
12035 | // The shuffle mask must be equal to (i * 2^N) % M. | |||
12036 | if ((uint64_t)Mask[i] == (((uint64_t)i << N) & ModMask)) | |||
12037 | IsAnyViable = true; | |||
12038 | else | |||
12039 | ViableForN[j] = false; | |||
12040 | } | |||
12041 | // Early exit if we exhaust the possible powers of two. | |||
12042 | if (!IsAnyViable) | |||
12043 | break; | |||
12044 | } | |||
12045 | ||||
12046 | for (unsigned j = 0; j != array_lengthof(ViableForN); ++j) | |||
12047 | if (ViableForN[j]) | |||
12048 | return j + 1; | |||
12049 | ||||
12050 | // Return 0 as there is no viable power of two. | |||
12051 | return 0; | |||
12052 | } | |||
12053 | ||||
12054 | // X86 has dedicated pack instructions that can handle specific truncation | |||
12055 | // operations: PACKSS and PACKUS. | |||
12056 | // Checks for compaction shuffle masks if MaxStages > 1. | |||
12057 | // TODO: Add support for matching multiple PACKSS/PACKUS stages. | |||
12058 | static bool matchShuffleWithPACK(MVT VT, MVT &SrcVT, SDValue &V1, SDValue &V2, | |||
12059 | unsigned &PackOpcode, ArrayRef<int> TargetMask, | |||
12060 | const SelectionDAG &DAG, | |||
12061 | const X86Subtarget &Subtarget, | |||
12062 | unsigned MaxStages = 1) { | |||
12063 | unsigned NumElts = VT.getVectorNumElements(); | |||
12064 | unsigned BitSize = VT.getScalarSizeInBits(); | |||
12065 | assert(0 < MaxStages && MaxStages <= 3 && (BitSize << MaxStages) <= 64 &&(static_cast <bool> (0 < MaxStages && MaxStages <= 3 && (BitSize << MaxStages) <= 64 && "Illegal maximum compaction") ? void (0) : __assert_fail ("0 < MaxStages && MaxStages <= 3 && (BitSize << MaxStages) <= 64 && \"Illegal maximum compaction\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 12066, __extension__ __PRETTY_FUNCTION__)) | |||
12066 | "Illegal maximum compaction")(static_cast <bool> (0 < MaxStages && MaxStages <= 3 && (BitSize << MaxStages) <= 64 && "Illegal maximum compaction") ? void (0) : __assert_fail ("0 < MaxStages && MaxStages <= 3 && (BitSize << MaxStages) <= 64 && \"Illegal maximum compaction\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 12066, __extension__ __PRETTY_FUNCTION__)); | |||
12067 | ||||
12068 | auto MatchPACK = [&](SDValue N1, SDValue N2, MVT PackVT) { | |||
12069 | unsigned NumSrcBits = PackVT.getScalarSizeInBits(); | |||
12070 | unsigned NumPackedBits = NumSrcBits - BitSize; | |||
12071 | N1 = peekThroughBitcasts(N1); | |||
12072 | N2 = peekThroughBitcasts(N2); | |||
12073 | unsigned NumBits1 = N1.getScalarValueSizeInBits(); | |||
12074 | unsigned NumBits2 = N2.getScalarValueSizeInBits(); | |||
12075 | bool IsZero1 = llvm::isNullOrNullSplat(N1, /*AllowUndefs*/ false); | |||
12076 | bool IsZero2 = llvm::isNullOrNullSplat(N2, /*AllowUndefs*/ false); | |||
12077 | if ((!N1.isUndef() && !IsZero1 && NumBits1 != NumSrcBits) || | |||
12078 | (!N2.isUndef() && !IsZero2 && NumBits2 != NumSrcBits)) | |||
12079 | return false; | |||
12080 | if (Subtarget.hasSSE41() || BitSize == 8) { | |||
12081 | APInt ZeroMask = APInt::getHighBitsSet(NumSrcBits, NumPackedBits); | |||
12082 | if ((N1.isUndef() || IsZero1 || DAG.MaskedValueIsZero(N1, ZeroMask)) && | |||
12083 | (N2.isUndef() || IsZero2 || DAG.MaskedValueIsZero(N2, ZeroMask))) { | |||
12084 | V1 = N1; | |||
12085 | V2 = N2; | |||
12086 | SrcVT = PackVT; | |||
12087 | PackOpcode = X86ISD::PACKUS; | |||
12088 | return true; | |||
12089 | } | |||
12090 | } | |||
12091 | bool IsAllOnes1 = llvm::isAllOnesOrAllOnesSplat(N1, /*AllowUndefs*/ false); | |||
12092 | bool IsAllOnes2 = llvm::isAllOnesOrAllOnesSplat(N2, /*AllowUndefs*/ false); | |||
12093 | if ((N1.isUndef() || IsZero1 || IsAllOnes1 || | |||
12094 | DAG.ComputeNumSignBits(N1) > NumPackedBits) && | |||
12095 | (N2.isUndef() || IsZero2 || IsAllOnes2 || | |||
12096 | DAG.ComputeNumSignBits(N2) > NumPackedBits)) { | |||
12097 | V1 = N1; | |||
12098 | V2 = N2; | |||
12099 | SrcVT = PackVT; | |||
12100 | PackOpcode = X86ISD::PACKSS; | |||
12101 | return true; | |||
12102 | } | |||
12103 | return false; | |||
12104 | }; | |||
12105 | ||||
12106 | // Attempt to match against wider and wider compaction patterns. | |||
12107 | for (unsigned NumStages = 1; NumStages <= MaxStages; ++NumStages) { | |||
12108 | MVT PackSVT = MVT::getIntegerVT(BitSize << NumStages); | |||
12109 | MVT PackVT = MVT::getVectorVT(PackSVT, NumElts >> NumStages); | |||
12110 | ||||
12111 | // Try binary shuffle. | |||
12112 | SmallVector<int, 32> BinaryMask; | |||
12113 | createPackShuffleMask(VT, BinaryMask, false, NumStages); | |||
12114 | if (isTargetShuffleEquivalent(VT, TargetMask, BinaryMask, V1, V2)) | |||
12115 | if (MatchPACK(V1, V2, PackVT)) | |||
12116 | return true; | |||
12117 | ||||
12118 | // Try unary shuffle. | |||
12119 | SmallVector<int, 32> UnaryMask; | |||
12120 | createPackShuffleMask(VT, UnaryMask, true, NumStages); | |||
12121 | if (isTargetShuffleEquivalent(VT, TargetMask, UnaryMask, V1)) | |||
12122 | if (MatchPACK(V1, V1, PackVT)) | |||
12123 | return true; | |||
12124 | } | |||
12125 | ||||
12126 | return false; | |||
12127 | } | |||
12128 | ||||
12129 | static SDValue lowerShuffleWithPACK(const SDLoc &DL, MVT VT, ArrayRef<int> Mask, | |||
12130 | SDValue V1, SDValue V2, SelectionDAG &DAG, | |||
12131 | const X86Subtarget &Subtarget) { | |||
12132 | MVT PackVT; | |||
12133 | unsigned PackOpcode; | |||
12134 | unsigned SizeBits = VT.getSizeInBits(); | |||
12135 | unsigned EltBits = VT.getScalarSizeInBits(); | |||
12136 | unsigned MaxStages = Log2_32(64 / EltBits); | |||
12137 | if (!matchShuffleWithPACK(VT, PackVT, V1, V2, PackOpcode, Mask, DAG, | |||
12138 | Subtarget, MaxStages)) | |||
12139 | return SDValue(); | |||
12140 | ||||
12141 | unsigned CurrentEltBits = PackVT.getScalarSizeInBits(); | |||
12142 | unsigned NumStages = Log2_32(CurrentEltBits / EltBits); | |||
12143 | ||||
12144 | // Don't lower multi-stage packs on AVX512, truncation is better. | |||
12145 | if (NumStages != 1 && SizeBits == 128 && Subtarget.hasVLX()) | |||
12146 | return SDValue(); | |||
12147 | ||||
12148 | // Pack to the largest type possible: | |||
12149 | // vXi64/vXi32 -> PACK*SDW and vXi16 -> PACK*SWB. | |||
12150 | unsigned MaxPackBits = 16; | |||
12151 | if (CurrentEltBits > 16 && | |||
12152 | (PackOpcode == X86ISD::PACKSS || Subtarget.hasSSE41())) | |||
12153 | MaxPackBits = 32; | |||
12154 | ||||
12155 | // Repeatedly pack down to the target size. | |||
12156 | SDValue Res; | |||
12157 | for (unsigned i = 0; i != NumStages; ++i) { | |||
12158 | unsigned SrcEltBits = std::min(MaxPackBits, CurrentEltBits); | |||
12159 | unsigned NumSrcElts = SizeBits / SrcEltBits; | |||
12160 | MVT SrcSVT = MVT::getIntegerVT(SrcEltBits); | |||
12161 | MVT DstSVT = MVT::getIntegerVT(SrcEltBits / 2); | |||
12162 | MVT SrcVT = MVT::getVectorVT(SrcSVT, NumSrcElts); | |||
12163 | MVT DstVT = MVT::getVectorVT(DstSVT, NumSrcElts * 2); | |||
12164 | Res = DAG.getNode(PackOpcode, DL, DstVT, DAG.getBitcast(SrcVT, V1), | |||
12165 | DAG.getBitcast(SrcVT, V2)); | |||
12166 | V1 = V2 = Res; | |||
12167 | CurrentEltBits /= 2; | |||
12168 | } | |||
12169 | assert(Res && Res.getValueType() == VT &&(static_cast <bool> (Res && Res.getValueType() == VT && "Failed to lower compaction shuffle") ? void ( 0) : __assert_fail ("Res && Res.getValueType() == VT && \"Failed to lower compaction shuffle\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 12170, __extension__ __PRETTY_FUNCTION__)) | |||
12170 | "Failed to lower compaction shuffle")(static_cast <bool> (Res && Res.getValueType() == VT && "Failed to lower compaction shuffle") ? void ( 0) : __assert_fail ("Res && Res.getValueType() == VT && \"Failed to lower compaction shuffle\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 12170, __extension__ __PRETTY_FUNCTION__)); | |||
12171 | return Res; | |||
12172 | } | |||
12173 | ||||
12174 | /// Try to emit a bitmask instruction for a shuffle. | |||
12175 | /// | |||
12176 | /// This handles cases where we can model a blend exactly as a bitmask due to | |||
12177 | /// one of the inputs being zeroable. | |||
12178 | static SDValue lowerShuffleAsBitMask(const SDLoc &DL, MVT VT, SDValue V1, | |||
12179 | SDValue V2, ArrayRef<int> Mask, | |||
12180 | const APInt &Zeroable, | |||
12181 | const X86Subtarget &Subtarget, | |||
12182 | SelectionDAG &DAG) { | |||
12183 | MVT MaskVT = VT; | |||
12184 | MVT EltVT = VT.getVectorElementType(); | |||
12185 | SDValue Zero, AllOnes; | |||
12186 | // Use f64 if i64 isn't legal. | |||
12187 | if (EltVT == MVT::i64 && !Subtarget.is64Bit()) { | |||
12188 | EltVT = MVT::f64; | |||
12189 | MaskVT = MVT::getVectorVT(EltVT, Mask.size()); | |||
12190 | } | |||
12191 | ||||
12192 | MVT LogicVT = VT; | |||
12193 | if (EltVT == MVT::f32 || EltVT == MVT::f64) { | |||
12194 | Zero = DAG.getConstantFP(0.0, DL, EltVT); | |||
12195 | APFloat AllOnesValue = APFloat::getAllOnesValue( | |||
12196 | SelectionDAG::EVTToAPFloatSemantics(EltVT), EltVT.getSizeInBits()); | |||
12197 | AllOnes = DAG.getConstantFP(AllOnesValue, DL, EltVT); | |||
12198 | LogicVT = | |||
12199 | MVT::getVectorVT(EltVT == MVT::f64 ? MVT::i64 : MVT::i32, Mask.size()); | |||
12200 | } else { | |||
12201 | Zero = DAG.getConstant(0, DL, EltVT); | |||
12202 | AllOnes = DAG.getAllOnesConstant(DL, EltVT); | |||
12203 | } | |||
12204 | ||||
12205 | SmallVector<SDValue, 16> VMaskOps(Mask.size(), Zero); | |||
12206 | SDValue V; | |||
12207 | for (int i = 0, Size = Mask.size(); i < Size; ++i) { | |||
12208 | if (Zeroable[i]) | |||
12209 | continue; | |||
12210 | if (Mask[i] % Size != i) | |||
12211 | return SDValue(); // Not a blend. | |||
12212 | if (!V) | |||
12213 | V = Mask[i] < Size ? V1 : V2; | |||
12214 | else if (V != (Mask[i] < Size ? V1 : V2)) | |||
12215 | return SDValue(); // Can only let one input through the mask. | |||
12216 | ||||
12217 | VMaskOps[i] = AllOnes; | |||
12218 | } | |||
12219 | if (!V) | |||
12220 | return SDValue(); // No non-zeroable elements! | |||
12221 | ||||
12222 | SDValue VMask = DAG.getBuildVector(MaskVT, DL, VMaskOps); | |||
12223 | VMask = DAG.getBitcast(LogicVT, VMask); | |||
12224 | V = DAG.getBitcast(LogicVT, V); | |||
12225 | SDValue And = DAG.getNode(ISD::AND, DL, LogicVT, V, VMask); | |||
12226 | return DAG.getBitcast(VT, And); | |||
12227 | } | |||
12228 | ||||
12229 | /// Try to emit a blend instruction for a shuffle using bit math. | |||
12230 | /// | |||
12231 | /// This is used as a fallback approach when first class blend instructions are | |||
12232 | /// unavailable. Currently it is only suitable for integer vectors, but could | |||
12233 | /// be generalized for floating point vectors if desirable. | |||
12234 | static SDValue lowerShuffleAsBitBlend(const SDLoc &DL, MVT VT, SDValue V1, | |||
12235 | SDValue V2, ArrayRef<int> Mask, | |||
12236 | SelectionDAG &DAG) { | |||
12237 | assert(VT.isInteger() && "Only supports integer vector types!")(static_cast <bool> (VT.isInteger() && "Only supports integer vector types!" ) ? void (0) : __assert_fail ("VT.isInteger() && \"Only supports integer vector types!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 12237, __extension__ __PRETTY_FUNCTION__)); | |||
12238 | MVT EltVT = VT.getVectorElementType(); | |||
12239 | SDValue Zero = DAG.getConstant(0, DL, EltVT); | |||
12240 | SDValue AllOnes = DAG.getAllOnesConstant(DL, EltVT); | |||
12241 | SmallVector<SDValue, 16> MaskOps; | |||
12242 | for (int i = 0, Size = Mask.size(); i < Size; ++i) { | |||
12243 | if (Mask[i] >= 0 && Mask[i] != i && Mask[i] != i + Size) | |||
12244 | return SDValue(); // Shuffled input! | |||
12245 | MaskOps.push_back(Mask[i] < Size ? AllOnes : Zero); | |||
12246 | } | |||
12247 | ||||
12248 | SDValue V1Mask = DAG.getBuildVector(VT, DL, MaskOps); | |||
12249 | V1 = DAG.getNode(ISD::AND, DL, VT, V1, V1Mask); | |||
12250 | V2 = DAG.getNode(X86ISD::ANDNP, DL, VT, V1Mask, V2); | |||
12251 | return DAG.getNode(ISD::OR, DL, VT, V1, V2); | |||
12252 | } | |||
12253 | ||||
12254 | static SDValue getVectorMaskingNode(SDValue Op, SDValue Mask, | |||
12255 | SDValue PreservedSrc, | |||
12256 | const X86Subtarget &Subtarget, | |||
12257 | SelectionDAG &DAG); | |||
12258 | ||||
12259 | static bool matchShuffleAsBlend(SDValue V1, SDValue V2, | |||
12260 | MutableArrayRef<int> Mask, | |||
12261 | const APInt &Zeroable, bool &ForceV1Zero, | |||
12262 | bool &ForceV2Zero, uint64_t &BlendMask) { | |||
12263 | bool V1IsZeroOrUndef = | |||
12264 | V1.isUndef() || ISD::isBuildVectorAllZeros(V1.getNode()); | |||
12265 | bool V2IsZeroOrUndef = | |||
12266 | V2.isUndef() || ISD::isBuildVectorAllZeros(V2.getNode()); | |||
12267 | ||||
12268 | BlendMask = 0; | |||
12269 | ForceV1Zero = false, ForceV2Zero = false; | |||
12270 | assert(Mask.size() <= 64 && "Shuffle mask too big for blend mask")(static_cast <bool> (Mask.size() <= 64 && "Shuffle mask too big for blend mask" ) ? void (0) : __assert_fail ("Mask.size() <= 64 && \"Shuffle mask too big for blend mask\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 12270, __extension__ __PRETTY_FUNCTION__)); | |||
12271 | ||||
12272 | // Attempt to generate the binary blend mask. If an input is zero then | |||
12273 | // we can use any lane. | |||
12274 | for (int i = 0, Size = Mask.size(); i < Size; ++i) { | |||
12275 | int M = Mask[i]; | |||
12276 | if (M == SM_SentinelUndef) | |||
12277 | continue; | |||
12278 | if (M == i || | |||
12279 | (0 <= M && M < Size && IsElementEquivalent(Size, V1, V1, M, i))) { | |||
12280 | Mask[i] = i; | |||
12281 | continue; | |||
12282 | } | |||
12283 | if (M == (i + Size) || | |||
12284 | (Size <= M && IsElementEquivalent(Size, V2, V2, M - Size, i))) { | |||
12285 | BlendMask |= 1ull << i; | |||
12286 | Mask[i] = i + Size; | |||
12287 | continue; | |||
12288 | } | |||
12289 | if (Zeroable[i]) { | |||
12290 | if (V1IsZeroOrUndef) { | |||
12291 | ForceV1Zero = true; | |||
12292 | Mask[i] = i; | |||
12293 | continue; | |||
12294 | } | |||
12295 | if (V2IsZeroOrUndef) { | |||
12296 | ForceV2Zero = true; | |||
12297 | BlendMask |= 1ull << i; | |||
12298 | Mask[i] = i + Size; | |||
12299 | continue; | |||
12300 | } | |||
12301 | } | |||
12302 | return false; | |||
12303 | } | |||
12304 | return true; | |||
12305 | } | |||
12306 | ||||
12307 | static uint64_t scaleVectorShuffleBlendMask(uint64_t BlendMask, int Size, | |||
12308 | int Scale) { | |||
12309 | uint64_t ScaledMask = 0; | |||
12310 | for (int i = 0; i != Size; ++i) | |||
12311 | if (BlendMask & (1ull << i)) | |||
12312 | ScaledMask |= ((1ull << Scale) - 1) << (i * Scale); | |||
12313 | return ScaledMask; | |||
12314 | } | |||
12315 | ||||
12316 | /// Try to emit a blend instruction for a shuffle. | |||
12317 | /// | |||
12318 | /// This doesn't do any checks for the availability of instructions for blending | |||
12319 | /// these values. It relies on the availability of the X86ISD::BLENDI pattern to | |||
12320 | /// be matched in the backend with the type given. What it does check for is | |||
12321 | /// that the shuffle mask is a blend, or convertible into a blend with zero. | |||
12322 | static SDValue lowerShuffleAsBlend(const SDLoc &DL, MVT VT, SDValue V1, | |||
12323 | SDValue V2, ArrayRef<int> Original, | |||
12324 | const APInt &Zeroable, | |||
12325 | const X86Subtarget &Subtarget, | |||
12326 | SelectionDAG &DAG) { | |||
12327 | uint64_t BlendMask = 0; | |||
12328 | bool ForceV1Zero = false, ForceV2Zero = false; | |||
12329 | SmallVector<int, 64> Mask(Original.begin(), Original.end()); | |||
12330 | if (!matchShuffleAsBlend(V1, V2, Mask, Zeroable, ForceV1Zero, ForceV2Zero, | |||
12331 | BlendMask)) | |||
12332 | return SDValue(); | |||
12333 | ||||
12334 | // Create a REAL zero vector - ISD::isBuildVectorAllZeros allows UNDEFs. | |||
12335 | if (ForceV1Zero) | |||
12336 | V1 = getZeroVector(VT, Subtarget, DAG, DL); | |||
12337 | if (ForceV2Zero) | |||
12338 | V2 = getZeroVector(VT, Subtarget, DAG, DL); | |||
12339 | ||||
12340 | switch (VT.SimpleTy) { | |||
12341 | case MVT::v4i64: | |||
12342 | case MVT::v8i32: | |||
12343 | assert(Subtarget.hasAVX2() && "256-bit integer blends require AVX2!")(static_cast <bool> (Subtarget.hasAVX2() && "256-bit integer blends require AVX2!" ) ? void (0) : __assert_fail ("Subtarget.hasAVX2() && \"256-bit integer blends require AVX2!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 12343, __extension__ __PRETTY_FUNCTION__)); | |||
12344 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
12345 | case MVT::v4f64: | |||
12346 | case MVT::v8f32: | |||
12347 | assert(Subtarget.hasAVX() && "256-bit float blends require AVX!")(static_cast <bool> (Subtarget.hasAVX() && "256-bit float blends require AVX!" ) ? void (0) : __assert_fail ("Subtarget.hasAVX() && \"256-bit float blends require AVX!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 12347, __extension__ __PRETTY_FUNCTION__)); | |||
12348 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
12349 | case MVT::v2f64: | |||
12350 | case MVT::v2i64: | |||
12351 | case MVT::v4f32: | |||
12352 | case MVT::v4i32: | |||
12353 | case MVT::v8i16: | |||
12354 | assert(Subtarget.hasSSE41() && "128-bit blends require SSE41!")(static_cast <bool> (Subtarget.hasSSE41() && "128-bit blends require SSE41!" ) ? void (0) : __assert_fail ("Subtarget.hasSSE41() && \"128-bit blends require SSE41!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 12354, __extension__ __PRETTY_FUNCTION__)); | |||
12355 | return DAG.getNode(X86ISD::BLENDI, DL, VT, V1, V2, | |||
12356 | DAG.getTargetConstant(BlendMask, DL, MVT::i8)); | |||
12357 | case MVT::v16i16: { | |||
12358 | assert(Subtarget.hasAVX2() && "v16i16 blends require AVX2!")(static_cast <bool> (Subtarget.hasAVX2() && "v16i16 blends require AVX2!" ) ? void (0) : __assert_fail ("Subtarget.hasAVX2() && \"v16i16 blends require AVX2!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 12358, __extension__ __PRETTY_FUNCTION__)); | |||
12359 | SmallVector<int, 8> RepeatedMask; | |||
12360 | if (is128BitLaneRepeatedShuffleMask(MVT::v16i16, Mask, RepeatedMask)) { | |||
12361 | // We can lower these with PBLENDW which is mirrored across 128-bit lanes. | |||
12362 | assert(RepeatedMask.size() == 8 && "Repeated mask size doesn't match!")(static_cast <bool> (RepeatedMask.size() == 8 && "Repeated mask size doesn't match!") ? void (0) : __assert_fail ("RepeatedMask.size() == 8 && \"Repeated mask size doesn't match!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 12362, __extension__ __PRETTY_FUNCTION__)); | |||
12363 | BlendMask = 0; | |||
12364 | for (int i = 0; i < 8; ++i) | |||
12365 | if (RepeatedMask[i] >= 8) | |||
12366 | BlendMask |= 1ull << i; | |||
12367 | return DAG.getNode(X86ISD::BLENDI, DL, MVT::v16i16, V1, V2, | |||
12368 | DAG.getTargetConstant(BlendMask, DL, MVT::i8)); | |||
12369 | } | |||
12370 | // Use PBLENDW for lower/upper lanes and then blend lanes. | |||
12371 | // TODO - we should allow 2 PBLENDW here and leave shuffle combine to | |||
12372 | // merge to VSELECT where useful. | |||
12373 | uint64_t LoMask = BlendMask & 0xFF; | |||
12374 | uint64_t HiMask = (BlendMask >> 8) & 0xFF; | |||
12375 | if (LoMask == 0 || LoMask == 255 || HiMask == 0 || HiMask == 255) { | |||
12376 | SDValue Lo = DAG.getNode(X86ISD::BLENDI, DL, MVT::v16i16, V1, V2, | |||
12377 | DAG.getTargetConstant(LoMask, DL, MVT::i8)); | |||
12378 | SDValue Hi = DAG.getNode(X86ISD::BLENDI, DL, MVT::v16i16, V1, V2, | |||
12379 | DAG.getTargetConstant(HiMask, DL, MVT::i8)); | |||
12380 | return DAG.getVectorShuffle( | |||
12381 | MVT::v16i16, DL, Lo, Hi, | |||
12382 | {0, 1, 2, 3, 4, 5, 6, 7, 24, 25, 26, 27, 28, 29, 30, 31}); | |||
12383 | } | |||
12384 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
12385 | } | |||
12386 | case MVT::v32i8: | |||
12387 | assert(Subtarget.hasAVX2() && "256-bit byte-blends require AVX2!")(static_cast <bool> (Subtarget.hasAVX2() && "256-bit byte-blends require AVX2!" ) ? void (0) : __assert_fail ("Subtarget.hasAVX2() && \"256-bit byte-blends require AVX2!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 12387, __extension__ __PRETTY_FUNCTION__)); | |||
12388 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
12389 | case MVT::v16i8: { | |||
12390 | assert(Subtarget.hasSSE41() && "128-bit byte-blends require SSE41!")(static_cast <bool> (Subtarget.hasSSE41() && "128-bit byte-blends require SSE41!" ) ? void (0) : __assert_fail ("Subtarget.hasSSE41() && \"128-bit byte-blends require SSE41!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 12390, __extension__ __PRETTY_FUNCTION__)); | |||
12391 | ||||
12392 | // Attempt to lower to a bitmask if we can. VPAND is faster than VPBLENDVB. | |||
12393 | if (SDValue Masked = lowerShuffleAsBitMask(DL, VT, V1, V2, Mask, Zeroable, | |||
12394 | Subtarget, DAG)) | |||
12395 | return Masked; | |||
12396 | ||||
12397 | if (Subtarget.hasBWI() && Subtarget.hasVLX()) { | |||
12398 | MVT IntegerType = | |||
12399 | MVT::getIntegerVT(std::max((int)VT.getVectorNumElements(), 8)); | |||
12400 | SDValue MaskNode = DAG.getConstant(BlendMask, DL, IntegerType); | |||
12401 | return getVectorMaskingNode(V2, MaskNode, V1, Subtarget, DAG); | |||
12402 | } | |||
12403 | ||||
12404 | // If we have VPTERNLOG, we can use that as a bit blend. | |||
12405 | if (Subtarget.hasVLX()) | |||
12406 | if (SDValue BitBlend = | |||
12407 | lowerShuffleAsBitBlend(DL, VT, V1, V2, Mask, DAG)) | |||
12408 | return BitBlend; | |||
12409 | ||||
12410 | // Scale the blend by the number of bytes per element. | |||
12411 | int Scale = VT.getScalarSizeInBits() / 8; | |||
12412 | ||||
12413 | // This form of blend is always done on bytes. Compute the byte vector | |||
12414 | // type. | |||
12415 | MVT BlendVT = MVT::getVectorVT(MVT::i8, VT.getSizeInBits() / 8); | |||
12416 | ||||
12417 | // x86 allows load folding with blendvb from the 2nd source operand. But | |||
12418 | // we are still using LLVM select here (see comment below), so that's V1. | |||
12419 | // If V2 can be load-folded and V1 cannot be load-folded, then commute to | |||
12420 | // allow that load-folding possibility. | |||
12421 | if (!ISD::isNormalLoad(V1.getNode()) && ISD::isNormalLoad(V2.getNode())) { | |||
12422 | ShuffleVectorSDNode::commuteMask(Mask); | |||
12423 | std::swap(V1, V2); | |||
12424 | } | |||
12425 | ||||
12426 | // Compute the VSELECT mask. Note that VSELECT is really confusing in the | |||
12427 | // mix of LLVM's code generator and the x86 backend. We tell the code | |||
12428 | // generator that boolean values in the elements of an x86 vector register | |||
12429 | // are -1 for true and 0 for false. We then use the LLVM semantics of 'true' | |||
12430 | // mapping a select to operand #1, and 'false' mapping to operand #2. The | |||
12431 | // reality in x86 is that vector masks (pre-AVX-512) use only the high bit | |||
12432 | // of the element (the remaining are ignored) and 0 in that high bit would | |||
12433 | // mean operand #1 while 1 in the high bit would mean operand #2. So while | |||
12434 | // the LLVM model for boolean values in vector elements gets the relevant | |||
12435 | // bit set, it is set backwards and over constrained relative to x86's | |||
12436 | // actual model. | |||
12437 | SmallVector<SDValue, 32> VSELECTMask; | |||
12438 | for (int i = 0, Size = Mask.size(); i < Size; ++i) | |||
12439 | for (int j = 0; j < Scale; ++j) | |||
12440 | VSELECTMask.push_back( | |||
12441 | Mask[i] < 0 ? DAG.getUNDEF(MVT::i8) | |||
12442 | : DAG.getConstant(Mask[i] < Size ? -1 : 0, DL, | |||
12443 | MVT::i8)); | |||
12444 | ||||
12445 | V1 = DAG.getBitcast(BlendVT, V1); | |||
12446 | V2 = DAG.getBitcast(BlendVT, V2); | |||
12447 | return DAG.getBitcast( | |||
12448 | VT, | |||
12449 | DAG.getSelect(DL, BlendVT, DAG.getBuildVector(BlendVT, DL, VSELECTMask), | |||
12450 | V1, V2)); | |||
12451 | } | |||
12452 | case MVT::v16f32: | |||
12453 | case MVT::v8f64: | |||
12454 | case MVT::v8i64: | |||
12455 | case MVT::v16i32: | |||
12456 | case MVT::v32i16: | |||
12457 | case MVT::v64i8: { | |||
12458 | // Attempt to lower to a bitmask if we can. Only if not optimizing for size. | |||
12459 | bool OptForSize = DAG.shouldOptForSize(); | |||
12460 | if (!OptForSize) { | |||
12461 | if (SDValue Masked = lowerShuffleAsBitMask(DL, VT, V1, V2, Mask, Zeroable, | |||
12462 | Subtarget, DAG)) | |||
12463 | return Masked; | |||
12464 | } | |||
12465 | ||||
12466 | // Otherwise load an immediate into a GPR, cast to k-register, and use a | |||
12467 | // masked move. | |||
12468 | MVT IntegerType = | |||
12469 | MVT::getIntegerVT(std::max((int)VT.getVectorNumElements(), 8)); | |||
12470 | SDValue MaskNode = DAG.getConstant(BlendMask, DL, IntegerType); | |||
12471 | return getVectorMaskingNode(V2, MaskNode, V1, Subtarget, DAG); | |||
12472 | } | |||
12473 | default: | |||
12474 | llvm_unreachable("Not a supported integer vector type!")::llvm::llvm_unreachable_internal("Not a supported integer vector type!" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 12474); | |||
12475 | } | |||
12476 | } | |||
12477 | ||||
12478 | /// Try to lower as a blend of elements from two inputs followed by | |||
12479 | /// a single-input permutation. | |||
12480 | /// | |||
12481 | /// This matches the pattern where we can blend elements from two inputs and | |||
12482 | /// then reduce the shuffle to a single-input permutation. | |||
12483 | static SDValue lowerShuffleAsBlendAndPermute(const SDLoc &DL, MVT VT, | |||
12484 | SDValue V1, SDValue V2, | |||
12485 | ArrayRef<int> Mask, | |||
12486 | SelectionDAG &DAG, | |||
12487 | bool ImmBlends = false) { | |||
12488 | // We build up the blend mask while checking whether a blend is a viable way | |||
12489 | // to reduce the shuffle. | |||
12490 | SmallVector<int, 32> BlendMask(Mask.size(), -1); | |||
12491 | SmallVector<int, 32> PermuteMask(Mask.size(), -1); | |||
12492 | ||||
12493 | for (int i = 0, Size = Mask.size(); i < Size; ++i) { | |||
12494 | if (Mask[i] < 0) | |||
12495 | continue; | |||
12496 | ||||
12497 | assert(Mask[i] < Size * 2 && "Shuffle input is out of bounds.")(static_cast <bool> (Mask[i] < Size * 2 && "Shuffle input is out of bounds." ) ? void (0) : __assert_fail ("Mask[i] < Size * 2 && \"Shuffle input is out of bounds.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 12497, __extension__ __PRETTY_FUNCTION__)); | |||
12498 | ||||
12499 | if (BlendMask[Mask[i] % Size] < 0) | |||
12500 | BlendMask[Mask[i] % Size] = Mask[i]; | |||
12501 | else if (BlendMask[Mask[i] % Size] != Mask[i]) | |||
12502 | return SDValue(); // Can't blend in the needed input! | |||
12503 | ||||
12504 | PermuteMask[i] = Mask[i] % Size; | |||
12505 | } | |||
12506 | ||||
12507 | // If only immediate blends, then bail if the blend mask can't be widened to | |||
12508 | // i16. | |||
12509 | unsigned EltSize = VT.getScalarSizeInBits(); | |||
12510 | if (ImmBlends && EltSize == 8 && !canWidenShuffleElements(BlendMask)) | |||
12511 | return SDValue(); | |||
12512 | ||||
12513 | SDValue V = DAG.getVectorShuffle(VT, DL, V1, V2, BlendMask); | |||
12514 | return DAG.getVectorShuffle(VT, DL, V, DAG.getUNDEF(VT), PermuteMask); | |||
12515 | } | |||
12516 | ||||
12517 | /// Try to lower as an unpack of elements from two inputs followed by | |||
12518 | /// a single-input permutation. | |||
12519 | /// | |||
12520 | /// This matches the pattern where we can unpack elements from two inputs and | |||
12521 | /// then reduce the shuffle to a single-input (wider) permutation. | |||
12522 | static SDValue lowerShuffleAsUNPCKAndPermute(const SDLoc &DL, MVT VT, | |||
12523 | SDValue V1, SDValue V2, | |||
12524 | ArrayRef<int> Mask, | |||
12525 | SelectionDAG &DAG) { | |||
12526 | int NumElts = Mask.size(); | |||
12527 | int NumLanes = VT.getSizeInBits() / 128; | |||
12528 | int NumLaneElts = NumElts / NumLanes; | |||
12529 | int NumHalfLaneElts = NumLaneElts / 2; | |||
12530 | ||||
12531 | bool MatchLo = true, MatchHi = true; | |||
12532 | SDValue Ops[2] = {DAG.getUNDEF(VT), DAG.getUNDEF(VT)}; | |||
12533 | ||||
12534 | // Determine UNPCKL/UNPCKH type and operand order. | |||
12535 | for (int Lane = 0; Lane != NumElts; Lane += NumLaneElts) { | |||
12536 | for (int Elt = 0; Elt != NumLaneElts; ++Elt) { | |||
12537 | int M = Mask[Lane + Elt]; | |||
12538 | if (M < 0) | |||
12539 | continue; | |||
12540 | ||||
12541 | SDValue &Op = Ops[Elt & 1]; | |||
12542 | if (M < NumElts && (Op.isUndef() || Op == V1)) | |||
12543 | Op = V1; | |||
12544 | else if (NumElts <= M && (Op.isUndef() || Op == V2)) | |||
12545 | Op = V2; | |||
12546 | else | |||
12547 | return SDValue(); | |||
12548 | ||||
12549 | int Lo = Lane, Mid = Lane + NumHalfLaneElts, Hi = Lane + NumLaneElts; | |||
12550 | MatchLo &= isUndefOrInRange(M, Lo, Mid) || | |||
12551 | isUndefOrInRange(M, NumElts + Lo, NumElts + Mid); | |||
12552 | MatchHi &= isUndefOrInRange(M, Mid, Hi) || | |||
12553 | isUndefOrInRange(M, NumElts + Mid, NumElts + Hi); | |||
12554 | if (!MatchLo && !MatchHi) | |||
12555 | return SDValue(); | |||
12556 | } | |||
12557 | } | |||
12558 | assert((MatchLo ^ MatchHi) && "Failed to match UNPCKLO/UNPCKHI")(static_cast <bool> ((MatchLo ^ MatchHi) && "Failed to match UNPCKLO/UNPCKHI" ) ? void (0) : __assert_fail ("(MatchLo ^ MatchHi) && \"Failed to match UNPCKLO/UNPCKHI\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 12558, __extension__ __PRETTY_FUNCTION__)); | |||
12559 | ||||
12560 | // Now check that each pair of elts come from the same unpack pair | |||
12561 | // and set the permute mask based on each pair. | |||
12562 | // TODO - Investigate cases where we permute individual elements. | |||
12563 | SmallVector<int, 32> PermuteMask(NumElts, -1); | |||
12564 | for (int Lane = 0; Lane != NumElts; Lane += NumLaneElts) { | |||
12565 | for (int Elt = 0; Elt != NumLaneElts; Elt += 2) { | |||
12566 | int M0 = Mask[Lane + Elt + 0]; | |||
12567 | int M1 = Mask[Lane + Elt + 1]; | |||
12568 | if (0 <= M0 && 0 <= M1 && | |||
12569 | (M0 % NumHalfLaneElts) != (M1 % NumHalfLaneElts)) | |||
12570 | return SDValue(); | |||
12571 | if (0 <= M0) | |||
12572 | PermuteMask[Lane + Elt + 0] = Lane + (2 * (M0 % NumHalfLaneElts)); | |||
12573 | if (0 <= M1) | |||
12574 | PermuteMask[Lane + Elt + 1] = Lane + (2 * (M1 % NumHalfLaneElts)) + 1; | |||
12575 | } | |||
12576 | } | |||
12577 | ||||
12578 | unsigned UnpckOp = MatchLo ? X86ISD::UNPCKL : X86ISD::UNPCKH; | |||
12579 | SDValue Unpck = DAG.getNode(UnpckOp, DL, VT, Ops); | |||
12580 | return DAG.getVectorShuffle(VT, DL, Unpck, DAG.getUNDEF(VT), PermuteMask); | |||
12581 | } | |||
12582 | ||||
12583 | /// Helper to form a PALIGNR-based rotate+permute, merging 2 inputs and then | |||
12584 | /// permuting the elements of the result in place. | |||
12585 | static SDValue lowerShuffleAsByteRotateAndPermute( | |||
12586 | const SDLoc &DL, MVT VT, SDValue V1, SDValue V2, ArrayRef<int> Mask, | |||
12587 | const X86Subtarget &Subtarget, SelectionDAG &DAG) { | |||
12588 | if ((VT.is128BitVector() && !Subtarget.hasSSSE3()) || | |||
12589 | (VT.is256BitVector() && !Subtarget.hasAVX2()) || | |||
12590 | (VT.is512BitVector() && !Subtarget.hasBWI())) | |||
12591 | return SDValue(); | |||
12592 | ||||
12593 | // We don't currently support lane crossing permutes. | |||
12594 | if (is128BitLaneCrossingShuffleMask(VT, Mask)) | |||
12595 | return SDValue(); | |||
12596 | ||||
12597 | int Scale = VT.getScalarSizeInBits() / 8; | |||
12598 | int NumLanes = VT.getSizeInBits() / 128; | |||
12599 | int NumElts = VT.getVectorNumElements(); | |||
12600 | int NumEltsPerLane = NumElts / NumLanes; | |||
12601 | ||||
12602 | // Determine range of mask elts. | |||
12603 | bool Blend1 = true; | |||
12604 | bool Blend2 = true; | |||
12605 | std::pair<int, int> Range1 = std::make_pair(INT_MAX2147483647, INT_MIN(-2147483647 -1)); | |||
12606 | std::pair<int, int> Range2 = std::make_pair(INT_MAX2147483647, INT_MIN(-2147483647 -1)); | |||
12607 | for (int Lane = 0; Lane != NumElts; Lane += NumEltsPerLane) { | |||
12608 | for (int Elt = 0; Elt != NumEltsPerLane; ++Elt) { | |||
12609 | int M = Mask[Lane + Elt]; | |||
12610 | if (M < 0) | |||
12611 | continue; | |||
12612 | if (M < NumElts) { | |||
12613 | Blend1 &= (M == (Lane + Elt)); | |||
12614 | assert(Lane <= M && M < (Lane + NumEltsPerLane) && "Out of range mask")(static_cast <bool> (Lane <= M && M < (Lane + NumEltsPerLane) && "Out of range mask") ? void (0) : __assert_fail ("Lane <= M && M < (Lane + NumEltsPerLane) && \"Out of range mask\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 12614, __extension__ __PRETTY_FUNCTION__)); | |||
12615 | M = M % NumEltsPerLane; | |||
12616 | Range1.first = std::min(Range1.first, M); | |||
12617 | Range1.second = std::max(Range1.second, M); | |||
12618 | } else { | |||
12619 | M -= NumElts; | |||
12620 | Blend2 &= (M == (Lane + Elt)); | |||
12621 | assert(Lane <= M && M < (Lane + NumEltsPerLane) && "Out of range mask")(static_cast <bool> (Lane <= M && M < (Lane + NumEltsPerLane) && "Out of range mask") ? void (0) : __assert_fail ("Lane <= M && M < (Lane + NumEltsPerLane) && \"Out of range mask\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 12621, __extension__ __PRETTY_FUNCTION__)); | |||
12622 | M = M % NumEltsPerLane; | |||
12623 | Range2.first = std::min(Range2.first, M); | |||
12624 | Range2.second = std::max(Range2.second, M); | |||
12625 | } | |||
12626 | } | |||
12627 | } | |||
12628 | ||||
12629 | // Bail if we don't need both elements. | |||
12630 | // TODO - it might be worth doing this for unary shuffles if the permute | |||
12631 | // can be widened. | |||
12632 | if (!(0 <= Range1.first && Range1.second < NumEltsPerLane) || | |||
12633 | !(0 <= Range2.first && Range2.second < NumEltsPerLane)) | |||
12634 | return SDValue(); | |||
12635 | ||||
12636 | if (VT.getSizeInBits() > 128 && (Blend1 || Blend2)) | |||
12637 | return SDValue(); | |||
12638 | ||||
12639 | // Rotate the 2 ops so we can access both ranges, then permute the result. | |||
12640 | auto RotateAndPermute = [&](SDValue Lo, SDValue Hi, int RotAmt, int Ofs) { | |||
12641 | MVT ByteVT = MVT::getVectorVT(MVT::i8, VT.getSizeInBits() / 8); | |||
12642 | SDValue Rotate = DAG.getBitcast( | |||
12643 | VT, DAG.getNode(X86ISD::PALIGNR, DL, ByteVT, DAG.getBitcast(ByteVT, Hi), | |||
12644 | DAG.getBitcast(ByteVT, Lo), | |||
12645 | DAG.getTargetConstant(Scale * RotAmt, DL, MVT::i8))); | |||
12646 | SmallVector<int, 64> PermMask(NumElts, SM_SentinelUndef); | |||
12647 | for (int Lane = 0; Lane != NumElts; Lane += NumEltsPerLane) { | |||
12648 | for (int Elt = 0; Elt != NumEltsPerLane; ++Elt) { | |||
12649 | int M = Mask[Lane + Elt]; | |||
12650 | if (M < 0) | |||
12651 | continue; | |||
12652 | if (M < NumElts) | |||
12653 | PermMask[Lane + Elt] = Lane + ((M + Ofs - RotAmt) % NumEltsPerLane); | |||
12654 | else | |||
12655 | PermMask[Lane + Elt] = Lane + ((M - Ofs - RotAmt) % NumEltsPerLane); | |||
12656 | } | |||
12657 | } | |||
12658 | return DAG.getVectorShuffle(VT, DL, Rotate, DAG.getUNDEF(VT), PermMask); | |||
12659 | }; | |||
12660 | ||||
12661 | // Check if the ranges are small enough to rotate from either direction. | |||
12662 | if (Range2.second < Range1.first) | |||
12663 | return RotateAndPermute(V1, V2, Range1.first, 0); | |||
12664 | if (Range1.second < Range2.first) | |||
12665 | return RotateAndPermute(V2, V1, Range2.first, NumElts); | |||
12666 | return SDValue(); | |||
12667 | } | |||
12668 | ||||
12669 | /// Generic routine to decompose a shuffle and blend into independent | |||
12670 | /// blends and permutes. | |||
12671 | /// | |||
12672 | /// This matches the extremely common pattern for handling combined | |||
12673 | /// shuffle+blend operations on newer X86 ISAs where we have very fast blend | |||
12674 | /// operations. It will try to pick the best arrangement of shuffles and | |||
12675 | /// blends. For vXi8/vXi16 shuffles we may use unpack instead of blend. | |||
12676 | static SDValue lowerShuffleAsDecomposedShuffleMerge( | |||
12677 | const SDLoc &DL, MVT VT, SDValue V1, SDValue V2, ArrayRef<int> Mask, | |||
12678 | const X86Subtarget &Subtarget, SelectionDAG &DAG) { | |||
12679 | int NumElts = Mask.size(); | |||
12680 | int NumLanes = VT.getSizeInBits() / 128; | |||
12681 | int NumEltsPerLane = NumElts / NumLanes; | |||
12682 | ||||
12683 | // Shuffle the input elements into the desired positions in V1 and V2 and | |||
12684 | // unpack/blend them together. | |||
12685 | bool IsAlternating = true; | |||
12686 | SmallVector<int, 32> V1Mask(NumElts, -1); | |||
12687 | SmallVector<int, 32> V2Mask(NumElts, -1); | |||
12688 | SmallVector<int, 32> FinalMask(NumElts, -1); | |||
12689 | for (int i = 0; i < NumElts; ++i) { | |||
12690 | int M = Mask[i]; | |||
12691 | if (M >= 0 && M < NumElts) { | |||
12692 | V1Mask[i] = M; | |||
12693 | FinalMask[i] = i; | |||
12694 | IsAlternating &= (i & 1) == 0; | |||
12695 | } else if (M >= NumElts) { | |||
12696 | V2Mask[i] = M - NumElts; | |||
12697 | FinalMask[i] = i + NumElts; | |||
12698 | IsAlternating &= (i & 1) == 1; | |||
12699 | } | |||
12700 | } | |||
12701 | ||||
12702 | // Try to lower with the simpler initial blend/unpack/rotate strategies unless | |||
12703 | // one of the input shuffles would be a no-op. We prefer to shuffle inputs as | |||
12704 | // the shuffle may be able to fold with a load or other benefit. However, when | |||
12705 | // we'll have to do 2x as many shuffles in order to achieve this, a 2-input | |||
12706 | // pre-shuffle first is a better strategy. | |||
12707 | if (!isNoopShuffleMask(V1Mask) && !isNoopShuffleMask(V2Mask)) { | |||
12708 | // Only prefer immediate blends to unpack/rotate. | |||
12709 | if (SDValue BlendPerm = lowerShuffleAsBlendAndPermute(DL, VT, V1, V2, Mask, | |||
12710 | DAG, true)) | |||
12711 | return BlendPerm; | |||
12712 | if (SDValue UnpackPerm = lowerShuffleAsUNPCKAndPermute(DL, VT, V1, V2, Mask, | |||
12713 | DAG)) | |||
12714 | return UnpackPerm; | |||
12715 | if (SDValue RotatePerm = lowerShuffleAsByteRotateAndPermute( | |||
12716 | DL, VT, V1, V2, Mask, Subtarget, DAG)) | |||
12717 | return RotatePerm; | |||
12718 | // Unpack/rotate failed - try again with variable blends. | |||
12719 | if (SDValue BlendPerm = lowerShuffleAsBlendAndPermute(DL, VT, V1, V2, Mask, | |||
12720 | DAG)) | |||
12721 | return BlendPerm; | |||
12722 | } | |||
12723 | ||||
12724 | // If the final mask is an alternating blend of vXi8/vXi16, convert to an | |||
12725 | // UNPCKL(SHUFFLE, SHUFFLE) pattern. | |||
12726 | // TODO: It doesn't have to be alternating - but each lane mustn't have more | |||
12727 | // than half the elements coming from each source. | |||
12728 | if (IsAlternating && VT.getScalarSizeInBits() < 32) { | |||
12729 | V1Mask.assign(NumElts, -1); | |||
12730 | V2Mask.assign(NumElts, -1); | |||
12731 | FinalMask.assign(NumElts, -1); | |||
12732 | for (int i = 0; i != NumElts; i += NumEltsPerLane) | |||
12733 | for (int j = 0; j != NumEltsPerLane; ++j) { | |||
12734 | int M = Mask[i + j]; | |||
12735 | if (M >= 0 && M < NumElts) { | |||
12736 | V1Mask[i + (j / 2)] = M; | |||
12737 | FinalMask[i + j] = i + (j / 2); | |||
12738 | } else if (M >= NumElts) { | |||
12739 | V2Mask[i + (j / 2)] = M - NumElts; | |||
12740 | FinalMask[i + j] = i + (j / 2) + NumElts; | |||
12741 | } | |||
12742 | } | |||
12743 | } | |||
12744 | ||||
12745 | V1 = DAG.getVectorShuffle(VT, DL, V1, DAG.getUNDEF(VT), V1Mask); | |||
12746 | V2 = DAG.getVectorShuffle(VT, DL, V2, DAG.getUNDEF(VT), V2Mask); | |||
12747 | return DAG.getVectorShuffle(VT, DL, V1, V2, FinalMask); | |||
12748 | } | |||
12749 | ||||
12750 | /// Try to lower a vector shuffle as a bit rotation. | |||
12751 | /// | |||
12752 | /// Look for a repeated rotation pattern in each sub group. | |||
12753 | /// Returns a ISD::ROTL element rotation amount or -1 if failed. | |||
12754 | static int matchShuffleAsBitRotate(ArrayRef<int> Mask, int NumSubElts) { | |||
12755 | int NumElts = Mask.size(); | |||
12756 | assert((NumElts % NumSubElts) == 0 && "Illegal shuffle mask")(static_cast <bool> ((NumElts % NumSubElts) == 0 && "Illegal shuffle mask") ? void (0) : __assert_fail ("(NumElts % NumSubElts) == 0 && \"Illegal shuffle mask\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 12756, __extension__ __PRETTY_FUNCTION__)); | |||
12757 | ||||
12758 | int RotateAmt = -1; | |||
12759 | for (int i = 0; i != NumElts; i += NumSubElts) { | |||
12760 | for (int j = 0; j != NumSubElts; ++j) { | |||
12761 | int M = Mask[i + j]; | |||
12762 | if (M < 0) | |||
12763 | continue; | |||
12764 | if (!isInRange(M, i, i + NumSubElts)) | |||
12765 | return -1; | |||
12766 | int Offset = (NumSubElts - (M - (i + j))) % NumSubElts; | |||
12767 | if (0 <= RotateAmt && Offset != RotateAmt) | |||
12768 | return -1; | |||
12769 | RotateAmt = Offset; | |||
12770 | } | |||
12771 | } | |||
12772 | return RotateAmt; | |||
12773 | } | |||
12774 | ||||
12775 | static int matchShuffleAsBitRotate(MVT &RotateVT, int EltSizeInBits, | |||
12776 | const X86Subtarget &Subtarget, | |||
12777 | ArrayRef<int> Mask) { | |||
12778 | assert(!isNoopShuffleMask(Mask) && "We shouldn't lower no-op shuffles!")(static_cast <bool> (!isNoopShuffleMask(Mask) && "We shouldn't lower no-op shuffles!") ? void (0) : __assert_fail ("!isNoopShuffleMask(Mask) && \"We shouldn't lower no-op shuffles!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 12778, __extension__ __PRETTY_FUNCTION__)); | |||
12779 | assert(EltSizeInBits < 64 && "Can't rotate 64-bit integers")(static_cast <bool> (EltSizeInBits < 64 && "Can't rotate 64-bit integers" ) ? void (0) : __assert_fail ("EltSizeInBits < 64 && \"Can't rotate 64-bit integers\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 12779, __extension__ __PRETTY_FUNCTION__)); | |||
12780 | ||||
12781 | // AVX512 only has vXi32/vXi64 rotates, so limit the rotation sub group size. | |||
12782 | int MinSubElts = Subtarget.hasAVX512() ? std::max(32 / EltSizeInBits, 2) : 2; | |||
12783 | int MaxSubElts = 64 / EltSizeInBits; | |||
12784 | for (int NumSubElts = MinSubElts; NumSubElts <= MaxSubElts; NumSubElts *= 2) { | |||
12785 | int RotateAmt = matchShuffleAsBitRotate(Mask, NumSubElts); | |||
12786 | if (RotateAmt < 0) | |||
12787 | continue; | |||
12788 | ||||
12789 | int NumElts = Mask.size(); | |||
12790 | MVT RotateSVT = MVT::getIntegerVT(EltSizeInBits * NumSubElts); | |||
12791 | RotateVT = MVT::getVectorVT(RotateSVT, NumElts / NumSubElts); | |||
12792 | return RotateAmt * EltSizeInBits; | |||
12793 | } | |||
12794 | ||||
12795 | return -1; | |||
12796 | } | |||
12797 | ||||
12798 | /// Lower shuffle using X86ISD::VROTLI rotations. | |||
12799 | static SDValue lowerShuffleAsBitRotate(const SDLoc &DL, MVT VT, SDValue V1, | |||
12800 | ArrayRef<int> Mask, | |||
12801 | const X86Subtarget &Subtarget, | |||
12802 | SelectionDAG &DAG) { | |||
12803 | // Only XOP + AVX512 targets have bit rotation instructions. | |||
12804 | // If we at least have SSSE3 (PSHUFB) then we shouldn't attempt to use this. | |||
12805 | bool IsLegal = | |||
12806 | (VT.is128BitVector() && Subtarget.hasXOP()) || Subtarget.hasAVX512(); | |||
12807 | if (!IsLegal && Subtarget.hasSSE3()) | |||
12808 | return SDValue(); | |||
12809 | ||||
12810 | MVT RotateVT; | |||
12811 | int RotateAmt = matchShuffleAsBitRotate(RotateVT, VT.getScalarSizeInBits(), | |||
12812 | Subtarget, Mask); | |||
12813 | if (RotateAmt < 0) | |||
12814 | return SDValue(); | |||
12815 | ||||
12816 | // For pre-SSSE3 targets, if we are shuffling vXi8 elts then ISD::ROTL, | |||
12817 | // expanded to OR(SRL,SHL), will be more efficient, but if they can | |||
12818 | // widen to vXi16 or more then existing lowering should will be better. | |||
12819 | if (!IsLegal) { | |||
12820 | if ((RotateAmt % 16) == 0) | |||
12821 | return SDValue(); | |||
12822 | // TODO: Use getTargetVShiftByConstNode. | |||
12823 | unsigned ShlAmt = RotateAmt; | |||
12824 | unsigned SrlAmt = RotateVT.getScalarSizeInBits() - RotateAmt; | |||
12825 | V1 = DAG.getBitcast(RotateVT, V1); | |||
12826 | SDValue SHL = DAG.getNode(X86ISD::VSHLI, DL, RotateVT, V1, | |||
12827 | DAG.getTargetConstant(ShlAmt, DL, MVT::i8)); | |||
12828 | SDValue SRL = DAG.getNode(X86ISD::VSRLI, DL, RotateVT, V1, | |||
12829 | DAG.getTargetConstant(SrlAmt, DL, MVT::i8)); | |||
12830 | SDValue Rot = DAG.getNode(ISD::OR, DL, RotateVT, SHL, SRL); | |||
12831 | return DAG.getBitcast(VT, Rot); | |||
12832 | } | |||
12833 | ||||
12834 | SDValue Rot = | |||
12835 | DAG.getNode(X86ISD::VROTLI, DL, RotateVT, DAG.getBitcast(RotateVT, V1), | |||
12836 | DAG.getTargetConstant(RotateAmt, DL, MVT::i8)); | |||
12837 | return DAG.getBitcast(VT, Rot); | |||
12838 | } | |||
12839 | ||||
12840 | /// Try to match a vector shuffle as an element rotation. | |||
12841 | /// | |||
12842 | /// This is used for support PALIGNR for SSSE3 or VALIGND/Q for AVX512. | |||
12843 | static int matchShuffleAsElementRotate(SDValue &V1, SDValue &V2, | |||
12844 | ArrayRef<int> Mask) { | |||
12845 | int NumElts = Mask.size(); | |||
12846 | ||||
12847 | // We need to detect various ways of spelling a rotation: | |||
12848 | // [11, 12, 13, 14, 15, 0, 1, 2] | |||
12849 | // [-1, 12, 13, 14, -1, -1, 1, -1] | |||
12850 | // [-1, -1, -1, -1, -1, -1, 1, 2] | |||
12851 | // [ 3, 4, 5, 6, 7, 8, 9, 10] | |||
12852 | // [-1, 4, 5, 6, -1, -1, 9, -1] | |||
12853 | // [-1, 4, 5, 6, -1, -1, -1, -1] | |||
12854 | int Rotation = 0; | |||
12855 | SDValue Lo, Hi; | |||
12856 | for (int i = 0; i < NumElts; ++i) { | |||
12857 | int M = Mask[i]; | |||
12858 | assert((M == SM_SentinelUndef || (0 <= M && M < (2*NumElts))) &&(static_cast <bool> ((M == SM_SentinelUndef || (0 <= M && M < (2*NumElts))) && "Unexpected mask index." ) ? void (0) : __assert_fail ("(M == SM_SentinelUndef || (0 <= M && M < (2*NumElts))) && \"Unexpected mask index.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 12859, __extension__ __PRETTY_FUNCTION__)) | |||
12859 | "Unexpected mask index.")(static_cast <bool> ((M == SM_SentinelUndef || (0 <= M && M < (2*NumElts))) && "Unexpected mask index." ) ? void (0) : __assert_fail ("(M == SM_SentinelUndef || (0 <= M && M < (2*NumElts))) && \"Unexpected mask index.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 12859, __extension__ __PRETTY_FUNCTION__)); | |||
12860 | if (M < 0) | |||
12861 | continue; | |||
12862 | ||||
12863 | // Determine where a rotated vector would have started. | |||
12864 | int StartIdx = i - (M % NumElts); | |||
12865 | if (StartIdx == 0) | |||
12866 | // The identity rotation isn't interesting, stop. | |||
12867 | return -1; | |||
12868 | ||||
12869 | // If we found the tail of a vector the rotation must be the missing | |||
12870 | // front. If we found the head of a vector, it must be how much of the | |||
12871 | // head. | |||
12872 | int CandidateRotation = StartIdx < 0 ? -StartIdx : NumElts - StartIdx; | |||
12873 | ||||
12874 | if (Rotation == 0) | |||
12875 | Rotation = CandidateRotation; | |||
12876 | else if (Rotation != CandidateRotation) | |||
12877 | // The rotations don't match, so we can't match this mask. | |||
12878 | return -1; | |||
12879 | ||||
12880 | // Compute which value this mask is pointing at. | |||
12881 | SDValue MaskV = M < NumElts ? V1 : V2; | |||
12882 | ||||
12883 | // Compute which of the two target values this index should be assigned | |||
12884 | // to. This reflects whether the high elements are remaining or the low | |||
12885 | // elements are remaining. | |||
12886 | SDValue &TargetV = StartIdx < 0 ? Hi : Lo; | |||
12887 | ||||
12888 | // Either set up this value if we've not encountered it before, or check | |||
12889 | // that it remains consistent. | |||
12890 | if (!TargetV) | |||
12891 | TargetV = MaskV; | |||
12892 | else if (TargetV != MaskV) | |||
12893 | // This may be a rotation, but it pulls from the inputs in some | |||
12894 | // unsupported interleaving. | |||
12895 | return -1; | |||
12896 | } | |||
12897 | ||||
12898 | // Check that we successfully analyzed the mask, and normalize the results. | |||
12899 | assert(Rotation != 0 && "Failed to locate a viable rotation!")(static_cast <bool> (Rotation != 0 && "Failed to locate a viable rotation!" ) ? void (0) : __assert_fail ("Rotation != 0 && \"Failed to locate a viable rotation!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 12899, __extension__ __PRETTY_FUNCTION__)); | |||
12900 | assert((Lo || Hi) && "Failed to find a rotated input vector!")(static_cast <bool> ((Lo || Hi) && "Failed to find a rotated input vector!" ) ? void (0) : __assert_fail ("(Lo || Hi) && \"Failed to find a rotated input vector!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 12900, __extension__ __PRETTY_FUNCTION__)); | |||
12901 | if (!Lo) | |||
12902 | Lo = Hi; | |||
12903 | else if (!Hi) | |||
12904 | Hi = Lo; | |||
12905 | ||||
12906 | V1 = Lo; | |||
12907 | V2 = Hi; | |||
12908 | ||||
12909 | return Rotation; | |||
12910 | } | |||
12911 | ||||
12912 | /// Try to lower a vector shuffle as a byte rotation. | |||
12913 | /// | |||
12914 | /// SSSE3 has a generic PALIGNR instruction in x86 that will do an arbitrary | |||
12915 | /// byte-rotation of the concatenation of two vectors; pre-SSSE3 can use | |||
12916 | /// a PSRLDQ/PSLLDQ/POR pattern to get a similar effect. This routine will | |||
12917 | /// try to generically lower a vector shuffle through such an pattern. It | |||
12918 | /// does not check for the profitability of lowering either as PALIGNR or | |||
12919 | /// PSRLDQ/PSLLDQ/POR, only whether the mask is valid to lower in that form. | |||
12920 | /// This matches shuffle vectors that look like: | |||
12921 | /// | |||
12922 | /// v8i16 [11, 12, 13, 14, 15, 0, 1, 2] | |||
12923 | /// | |||
12924 | /// Essentially it concatenates V1 and V2, shifts right by some number of | |||
12925 | /// elements, and takes the low elements as the result. Note that while this is | |||
12926 | /// specified as a *right shift* because x86 is little-endian, it is a *left | |||
12927 | /// rotate* of the vector lanes. | |||
12928 | static int matchShuffleAsByteRotate(MVT VT, SDValue &V1, SDValue &V2, | |||
12929 | ArrayRef<int> Mask) { | |||
12930 | // Don't accept any shuffles with zero elements. | |||
12931 | if (isAnyZero(Mask)) | |||
12932 | return -1; | |||
12933 | ||||
12934 | // PALIGNR works on 128-bit lanes. | |||
12935 | SmallVector<int, 16> RepeatedMask; | |||
12936 | if (!is128BitLaneRepeatedShuffleMask(VT, Mask, RepeatedMask)) | |||
12937 | return -1; | |||
12938 | ||||
12939 | int Rotation = matchShuffleAsElementRotate(V1, V2, RepeatedMask); | |||
12940 | if (Rotation <= 0) | |||
12941 | return -1; | |||
12942 | ||||
12943 | // PALIGNR rotates bytes, so we need to scale the | |||
12944 | // rotation based on how many bytes are in the vector lane. | |||
12945 | int NumElts = RepeatedMask.size(); | |||
12946 | int Scale = 16 / NumElts; | |||
12947 | return Rotation * Scale; | |||
12948 | } | |||
12949 | ||||
12950 | static SDValue lowerShuffleAsByteRotate(const SDLoc &DL, MVT VT, SDValue V1, | |||
12951 | SDValue V2, ArrayRef<int> Mask, | |||
12952 | const X86Subtarget &Subtarget, | |||
12953 | SelectionDAG &DAG) { | |||
12954 | assert(!isNoopShuffleMask(Mask) && "We shouldn't lower no-op shuffles!")(static_cast <bool> (!isNoopShuffleMask(Mask) && "We shouldn't lower no-op shuffles!") ? void (0) : __assert_fail ("!isNoopShuffleMask(Mask) && \"We shouldn't lower no-op shuffles!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 12954, __extension__ __PRETTY_FUNCTION__)); | |||
12955 | ||||
12956 | SDValue Lo = V1, Hi = V2; | |||
12957 | int ByteRotation = matchShuffleAsByteRotate(VT, Lo, Hi, Mask); | |||
12958 | if (ByteRotation <= 0) | |||
12959 | return SDValue(); | |||
12960 | ||||
12961 | // Cast the inputs to i8 vector of correct length to match PALIGNR or | |||
12962 | // PSLLDQ/PSRLDQ. | |||
12963 | MVT ByteVT = MVT::getVectorVT(MVT::i8, VT.getSizeInBits() / 8); | |||
12964 | Lo = DAG.getBitcast(ByteVT, Lo); | |||
12965 | Hi = DAG.getBitcast(ByteVT, Hi); | |||
12966 | ||||
12967 | // SSSE3 targets can use the palignr instruction. | |||
12968 | if (Subtarget.hasSSSE3()) { | |||
12969 | assert((!VT.is512BitVector() || Subtarget.hasBWI()) &&(static_cast <bool> ((!VT.is512BitVector() || Subtarget .hasBWI()) && "512-bit PALIGNR requires BWI instructions" ) ? void (0) : __assert_fail ("(!VT.is512BitVector() || Subtarget.hasBWI()) && \"512-bit PALIGNR requires BWI instructions\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 12970, __extension__ __PRETTY_FUNCTION__)) | |||
12970 | "512-bit PALIGNR requires BWI instructions")(static_cast <bool> ((!VT.is512BitVector() || Subtarget .hasBWI()) && "512-bit PALIGNR requires BWI instructions" ) ? void (0) : __assert_fail ("(!VT.is512BitVector() || Subtarget.hasBWI()) && \"512-bit PALIGNR requires BWI instructions\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 12970, __extension__ __PRETTY_FUNCTION__)); | |||
12971 | return DAG.getBitcast( | |||
12972 | VT, DAG.getNode(X86ISD::PALIGNR, DL, ByteVT, Lo, Hi, | |||
12973 | DAG.getTargetConstant(ByteRotation, DL, MVT::i8))); | |||
12974 | } | |||
12975 | ||||
12976 | assert(VT.is128BitVector() &&(static_cast <bool> (VT.is128BitVector() && "Rotate-based lowering only supports 128-bit lowering!" ) ? void (0) : __assert_fail ("VT.is128BitVector() && \"Rotate-based lowering only supports 128-bit lowering!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 12977, __extension__ __PRETTY_FUNCTION__)) | |||
12977 | "Rotate-based lowering only supports 128-bit lowering!")(static_cast <bool> (VT.is128BitVector() && "Rotate-based lowering only supports 128-bit lowering!" ) ? void (0) : __assert_fail ("VT.is128BitVector() && \"Rotate-based lowering only supports 128-bit lowering!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 12977, __extension__ __PRETTY_FUNCTION__)); | |||
12978 | assert(Mask.size() <= 16 &&(static_cast <bool> (Mask.size() <= 16 && "Can shuffle at most 16 bytes in a 128-bit vector!" ) ? void (0) : __assert_fail ("Mask.size() <= 16 && \"Can shuffle at most 16 bytes in a 128-bit vector!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 12979, __extension__ __PRETTY_FUNCTION__)) | |||
12979 | "Can shuffle at most 16 bytes in a 128-bit vector!")(static_cast <bool> (Mask.size() <= 16 && "Can shuffle at most 16 bytes in a 128-bit vector!" ) ? void (0) : __assert_fail ("Mask.size() <= 16 && \"Can shuffle at most 16 bytes in a 128-bit vector!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 12979, __extension__ __PRETTY_FUNCTION__)); | |||
12980 | assert(ByteVT == MVT::v16i8 &&(static_cast <bool> (ByteVT == MVT::v16i8 && "SSE2 rotate lowering only needed for v16i8!" ) ? void (0) : __assert_fail ("ByteVT == MVT::v16i8 && \"SSE2 rotate lowering only needed for v16i8!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 12981, __extension__ __PRETTY_FUNCTION__)) | |||
12981 | "SSE2 rotate lowering only needed for v16i8!")(static_cast <bool> (ByteVT == MVT::v16i8 && "SSE2 rotate lowering only needed for v16i8!" ) ? void (0) : __assert_fail ("ByteVT == MVT::v16i8 && \"SSE2 rotate lowering only needed for v16i8!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 12981, __extension__ __PRETTY_FUNCTION__)); | |||
12982 | ||||
12983 | // Default SSE2 implementation | |||
12984 | int LoByteShift = 16 - ByteRotation; | |||
12985 | int HiByteShift = ByteRotation; | |||
12986 | ||||
12987 | SDValue LoShift = | |||
12988 | DAG.getNode(X86ISD::VSHLDQ, DL, MVT::v16i8, Lo, | |||
12989 | DAG.getTargetConstant(LoByteShift, DL, MVT::i8)); | |||
12990 | SDValue HiShift = | |||
12991 | DAG.getNode(X86ISD::VSRLDQ, DL, MVT::v16i8, Hi, | |||
12992 | DAG.getTargetConstant(HiByteShift, DL, MVT::i8)); | |||
12993 | return DAG.getBitcast(VT, | |||
12994 | DAG.getNode(ISD::OR, DL, MVT::v16i8, LoShift, HiShift)); | |||
12995 | } | |||
12996 | ||||
12997 | /// Try to lower a vector shuffle as a dword/qword rotation. | |||
12998 | /// | |||
12999 | /// AVX512 has a VALIGND/VALIGNQ instructions that will do an arbitrary | |||
13000 | /// rotation of the concatenation of two vectors; This routine will | |||
13001 | /// try to generically lower a vector shuffle through such an pattern. | |||
13002 | /// | |||
13003 | /// Essentially it concatenates V1 and V2, shifts right by some number of | |||
13004 | /// elements, and takes the low elements as the result. Note that while this is | |||
13005 | /// specified as a *right shift* because x86 is little-endian, it is a *left | |||
13006 | /// rotate* of the vector lanes. | |||
13007 | static SDValue lowerShuffleAsVALIGN(const SDLoc &DL, MVT VT, SDValue V1, | |||
13008 | SDValue V2, ArrayRef<int> Mask, | |||
13009 | const X86Subtarget &Subtarget, | |||
13010 | SelectionDAG &DAG) { | |||
13011 | assert((VT.getScalarType() == MVT::i32 || VT.getScalarType() == MVT::i64) &&(static_cast <bool> ((VT.getScalarType() == MVT::i32 || VT.getScalarType() == MVT::i64) && "Only 32-bit and 64-bit elements are supported!" ) ? void (0) : __assert_fail ("(VT.getScalarType() == MVT::i32 || VT.getScalarType() == MVT::i64) && \"Only 32-bit and 64-bit elements are supported!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13012, __extension__ __PRETTY_FUNCTION__)) | |||
13012 | "Only 32-bit and 64-bit elements are supported!")(static_cast <bool> ((VT.getScalarType() == MVT::i32 || VT.getScalarType() == MVT::i64) && "Only 32-bit and 64-bit elements are supported!" ) ? void (0) : __assert_fail ("(VT.getScalarType() == MVT::i32 || VT.getScalarType() == MVT::i64) && \"Only 32-bit and 64-bit elements are supported!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13012, __extension__ __PRETTY_FUNCTION__)); | |||
13013 | ||||
13014 | // 128/256-bit vectors are only supported with VLX. | |||
13015 | assert((Subtarget.hasVLX() || (!VT.is128BitVector() && !VT.is256BitVector()))(static_cast <bool> ((Subtarget.hasVLX() || (!VT.is128BitVector () && !VT.is256BitVector())) && "VLX required for 128/256-bit vectors" ) ? void (0) : __assert_fail ("(Subtarget.hasVLX() || (!VT.is128BitVector() && !VT.is256BitVector())) && \"VLX required for 128/256-bit vectors\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13016, __extension__ __PRETTY_FUNCTION__)) | |||
13016 | && "VLX required for 128/256-bit vectors")(static_cast <bool> ((Subtarget.hasVLX() || (!VT.is128BitVector () && !VT.is256BitVector())) && "VLX required for 128/256-bit vectors" ) ? void (0) : __assert_fail ("(Subtarget.hasVLX() || (!VT.is128BitVector() && !VT.is256BitVector())) && \"VLX required for 128/256-bit vectors\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13016, __extension__ __PRETTY_FUNCTION__)); | |||
13017 | ||||
13018 | SDValue Lo = V1, Hi = V2; | |||
13019 | int Rotation = matchShuffleAsElementRotate(Lo, Hi, Mask); | |||
13020 | if (Rotation <= 0) | |||
13021 | return SDValue(); | |||
13022 | ||||
13023 | return DAG.getNode(X86ISD::VALIGN, DL, VT, Lo, Hi, | |||
13024 | DAG.getTargetConstant(Rotation, DL, MVT::i8)); | |||
13025 | } | |||
13026 | ||||
13027 | /// Try to lower a vector shuffle as a byte shift sequence. | |||
13028 | static SDValue lowerShuffleAsByteShiftMask(const SDLoc &DL, MVT VT, SDValue V1, | |||
13029 | SDValue V2, ArrayRef<int> Mask, | |||
13030 | const APInt &Zeroable, | |||
13031 | const X86Subtarget &Subtarget, | |||
13032 | SelectionDAG &DAG) { | |||
13033 | assert(!isNoopShuffleMask(Mask) && "We shouldn't lower no-op shuffles!")(static_cast <bool> (!isNoopShuffleMask(Mask) && "We shouldn't lower no-op shuffles!") ? void (0) : __assert_fail ("!isNoopShuffleMask(Mask) && \"We shouldn't lower no-op shuffles!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13033, __extension__ __PRETTY_FUNCTION__)); | |||
13034 | assert(VT.is128BitVector() && "Only 128-bit vectors supported")(static_cast <bool> (VT.is128BitVector() && "Only 128-bit vectors supported" ) ? void (0) : __assert_fail ("VT.is128BitVector() && \"Only 128-bit vectors supported\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13034, __extension__ __PRETTY_FUNCTION__)); | |||
13035 | ||||
13036 | // We need a shuffle that has zeros at one/both ends and a sequential | |||
13037 | // shuffle from one source within. | |||
13038 | unsigned ZeroLo = Zeroable.countTrailingOnes(); | |||
13039 | unsigned ZeroHi = Zeroable.countLeadingOnes(); | |||
13040 | if (!ZeroLo && !ZeroHi) | |||
13041 | return SDValue(); | |||
13042 | ||||
13043 | unsigned NumElts = Mask.size(); | |||
13044 | unsigned Len = NumElts - (ZeroLo + ZeroHi); | |||
13045 | if (!isSequentialOrUndefInRange(Mask, ZeroLo, Len, Mask[ZeroLo])) | |||
13046 | return SDValue(); | |||
13047 | ||||
13048 | unsigned Scale = VT.getScalarSizeInBits() / 8; | |||
13049 | ArrayRef<int> StubMask = Mask.slice(ZeroLo, Len); | |||
13050 | if (!isUndefOrInRange(StubMask, 0, NumElts) && | |||
13051 | !isUndefOrInRange(StubMask, NumElts, 2 * NumElts)) | |||
13052 | return SDValue(); | |||
13053 | ||||
13054 | SDValue Res = Mask[ZeroLo] < (int)NumElts ? V1 : V2; | |||
13055 | Res = DAG.getBitcast(MVT::v16i8, Res); | |||
13056 | ||||
13057 | // Use VSHLDQ/VSRLDQ ops to zero the ends of a vector and leave an | |||
13058 | // inner sequential set of elements, possibly offset: | |||
13059 | // 01234567 --> zzzzzz01 --> 1zzzzzzz | |||
13060 | // 01234567 --> 4567zzzz --> zzzzz456 | |||
13061 | // 01234567 --> z0123456 --> 3456zzzz --> zz3456zz | |||
13062 | if (ZeroLo == 0) { | |||
13063 | unsigned Shift = (NumElts - 1) - (Mask[ZeroLo + Len - 1] % NumElts); | |||
13064 | Res = DAG.getNode(X86ISD::VSHLDQ, DL, MVT::v16i8, Res, | |||
13065 | DAG.getTargetConstant(Scale * Shift, DL, MVT::i8)); | |||
13066 | Res = DAG.getNode(X86ISD::VSRLDQ, DL, MVT::v16i8, Res, | |||
13067 | DAG.getTargetConstant(Scale * ZeroHi, DL, MVT::i8)); | |||
13068 | } else if (ZeroHi == 0) { | |||
13069 | unsigned Shift = Mask[ZeroLo] % NumElts; | |||
13070 | Res = DAG.getNode(X86ISD::VSRLDQ, DL, MVT::v16i8, Res, | |||
13071 | DAG.getTargetConstant(Scale * Shift, DL, MVT::i8)); | |||
13072 | Res = DAG.getNode(X86ISD::VSHLDQ, DL, MVT::v16i8, Res, | |||
13073 | DAG.getTargetConstant(Scale * ZeroLo, DL, MVT::i8)); | |||
13074 | } else if (!Subtarget.hasSSSE3()) { | |||
13075 | // If we don't have PSHUFB then its worth avoiding an AND constant mask | |||
13076 | // by performing 3 byte shifts. Shuffle combining can kick in above that. | |||
13077 | // TODO: There may be some cases where VSH{LR}DQ+PAND is still better. | |||
13078 | unsigned Shift = (NumElts - 1) - (Mask[ZeroLo + Len - 1] % NumElts); | |||
13079 | Res = DAG.getNode(X86ISD::VSHLDQ, DL, MVT::v16i8, Res, | |||
13080 | DAG.getTargetConstant(Scale * Shift, DL, MVT::i8)); | |||
13081 | Shift += Mask[ZeroLo] % NumElts; | |||
13082 | Res = DAG.getNode(X86ISD::VSRLDQ, DL, MVT::v16i8, Res, | |||
13083 | DAG.getTargetConstant(Scale * Shift, DL, MVT::i8)); | |||
13084 | Res = DAG.getNode(X86ISD::VSHLDQ, DL, MVT::v16i8, Res, | |||
13085 | DAG.getTargetConstant(Scale * ZeroLo, DL, MVT::i8)); | |||
13086 | } else | |||
13087 | return SDValue(); | |||
13088 | ||||
13089 | return DAG.getBitcast(VT, Res); | |||
13090 | } | |||
13091 | ||||
13092 | /// Try to lower a vector shuffle as a bit shift (shifts in zeros). | |||
13093 | /// | |||
13094 | /// Attempts to match a shuffle mask against the PSLL(W/D/Q/DQ) and | |||
13095 | /// PSRL(W/D/Q/DQ) SSE2 and AVX2 logical bit-shift instructions. The function | |||
13096 | /// matches elements from one of the input vectors shuffled to the left or | |||
13097 | /// right with zeroable elements 'shifted in'. It handles both the strictly | |||
13098 | /// bit-wise element shifts and the byte shift across an entire 128-bit double | |||
13099 | /// quad word lane. | |||
13100 | /// | |||
13101 | /// PSHL : (little-endian) left bit shift. | |||
13102 | /// [ zz, 0, zz, 2 ] | |||
13103 | /// [ -1, 4, zz, -1 ] | |||
13104 | /// PSRL : (little-endian) right bit shift. | |||
13105 | /// [ 1, zz, 3, zz] | |||
13106 | /// [ -1, -1, 7, zz] | |||
13107 | /// PSLLDQ : (little-endian) left byte shift | |||
13108 | /// [ zz, 0, 1, 2, 3, 4, 5, 6] | |||
13109 | /// [ zz, zz, -1, -1, 2, 3, 4, -1] | |||
13110 | /// [ zz, zz, zz, zz, zz, zz, -1, 1] | |||
13111 | /// PSRLDQ : (little-endian) right byte shift | |||
13112 | /// [ 5, 6, 7, zz, zz, zz, zz, zz] | |||
13113 | /// [ -1, 5, 6, 7, zz, zz, zz, zz] | |||
13114 | /// [ 1, 2, -1, -1, -1, -1, zz, zz] | |||
13115 | static int matchShuffleAsShift(MVT &ShiftVT, unsigned &Opcode, | |||
13116 | unsigned ScalarSizeInBits, ArrayRef<int> Mask, | |||
13117 | int MaskOffset, const APInt &Zeroable, | |||
13118 | const X86Subtarget &Subtarget) { | |||
13119 | int Size = Mask.size(); | |||
13120 | unsigned SizeInBits = Size * ScalarSizeInBits; | |||
13121 | ||||
13122 | auto CheckZeros = [&](int Shift, int Scale, bool Left) { | |||
13123 | for (int i = 0; i < Size; i += Scale) | |||
13124 | for (int j = 0; j < Shift; ++j) | |||
13125 | if (!Zeroable[i + j + (Left ? 0 : (Scale - Shift))]) | |||
13126 | return false; | |||
13127 | ||||
13128 | return true; | |||
13129 | }; | |||
13130 | ||||
13131 | auto MatchShift = [&](int Shift, int Scale, bool Left) { | |||
13132 | for (int i = 0; i != Size; i += Scale) { | |||
13133 | unsigned Pos = Left ? i + Shift : i; | |||
13134 | unsigned Low = Left ? i : i + Shift; | |||
13135 | unsigned Len = Scale - Shift; | |||
13136 | if (!isSequentialOrUndefInRange(Mask, Pos, Len, Low + MaskOffset)) | |||
13137 | return -1; | |||
13138 | } | |||
13139 | ||||
13140 | int ShiftEltBits = ScalarSizeInBits * Scale; | |||
13141 | bool ByteShift = ShiftEltBits > 64; | |||
13142 | Opcode = Left ? (ByteShift ? X86ISD::VSHLDQ : X86ISD::VSHLI) | |||
13143 | : (ByteShift ? X86ISD::VSRLDQ : X86ISD::VSRLI); | |||
13144 | int ShiftAmt = Shift * ScalarSizeInBits / (ByteShift ? 8 : 1); | |||
13145 | ||||
13146 | // Normalize the scale for byte shifts to still produce an i64 element | |||
13147 | // type. | |||
13148 | Scale = ByteShift ? Scale / 2 : Scale; | |||
13149 | ||||
13150 | // We need to round trip through the appropriate type for the shift. | |||
13151 | MVT ShiftSVT = MVT::getIntegerVT(ScalarSizeInBits * Scale); | |||
13152 | ShiftVT = ByteShift ? MVT::getVectorVT(MVT::i8, SizeInBits / 8) | |||
13153 | : MVT::getVectorVT(ShiftSVT, Size / Scale); | |||
13154 | return (int)ShiftAmt; | |||
13155 | }; | |||
13156 | ||||
13157 | // SSE/AVX supports logical shifts up to 64-bit integers - so we can just | |||
13158 | // keep doubling the size of the integer elements up to that. We can | |||
13159 | // then shift the elements of the integer vector by whole multiples of | |||
13160 | // their width within the elements of the larger integer vector. Test each | |||
13161 | // multiple to see if we can find a match with the moved element indices | |||
13162 | // and that the shifted in elements are all zeroable. | |||
13163 | unsigned MaxWidth = ((SizeInBits == 512) && !Subtarget.hasBWI() ? 64 : 128); | |||
13164 | for (int Scale = 2; Scale * ScalarSizeInBits <= MaxWidth; Scale *= 2) | |||
13165 | for (int Shift = 1; Shift != Scale; ++Shift) | |||
13166 | for (bool Left : {true, false}) | |||
13167 | if (CheckZeros(Shift, Scale, Left)) { | |||
13168 | int ShiftAmt = MatchShift(Shift, Scale, Left); | |||
13169 | if (0 < ShiftAmt) | |||
13170 | return ShiftAmt; | |||
13171 | } | |||
13172 | ||||
13173 | // no match | |||
13174 | return -1; | |||
13175 | } | |||
13176 | ||||
13177 | static SDValue lowerShuffleAsShift(const SDLoc &DL, MVT VT, SDValue V1, | |||
13178 | SDValue V2, ArrayRef<int> Mask, | |||
13179 | const APInt &Zeroable, | |||
13180 | const X86Subtarget &Subtarget, | |||
13181 | SelectionDAG &DAG) { | |||
13182 | int Size = Mask.size(); | |||
13183 | assert(Size == (int)VT.getVectorNumElements() && "Unexpected mask size")(static_cast <bool> (Size == (int)VT.getVectorNumElements () && "Unexpected mask size") ? void (0) : __assert_fail ("Size == (int)VT.getVectorNumElements() && \"Unexpected mask size\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13183, __extension__ __PRETTY_FUNCTION__)); | |||
13184 | ||||
13185 | MVT ShiftVT; | |||
13186 | SDValue V = V1; | |||
13187 | unsigned Opcode; | |||
13188 | ||||
13189 | // Try to match shuffle against V1 shift. | |||
13190 | int ShiftAmt = matchShuffleAsShift(ShiftVT, Opcode, VT.getScalarSizeInBits(), | |||
13191 | Mask, 0, Zeroable, Subtarget); | |||
13192 | ||||
13193 | // If V1 failed, try to match shuffle against V2 shift. | |||
13194 | if (ShiftAmt < 0) { | |||
13195 | ShiftAmt = matchShuffleAsShift(ShiftVT, Opcode, VT.getScalarSizeInBits(), | |||
13196 | Mask, Size, Zeroable, Subtarget); | |||
13197 | V = V2; | |||
13198 | } | |||
13199 | ||||
13200 | if (ShiftAmt < 0) | |||
13201 | return SDValue(); | |||
13202 | ||||
13203 | assert(DAG.getTargetLoweringInfo().isTypeLegal(ShiftVT) &&(static_cast <bool> (DAG.getTargetLoweringInfo().isTypeLegal (ShiftVT) && "Illegal integer vector type") ? void (0 ) : __assert_fail ("DAG.getTargetLoweringInfo().isTypeLegal(ShiftVT) && \"Illegal integer vector type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13204, __extension__ __PRETTY_FUNCTION__)) | |||
13204 | "Illegal integer vector type")(static_cast <bool> (DAG.getTargetLoweringInfo().isTypeLegal (ShiftVT) && "Illegal integer vector type") ? void (0 ) : __assert_fail ("DAG.getTargetLoweringInfo().isTypeLegal(ShiftVT) && \"Illegal integer vector type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13204, __extension__ __PRETTY_FUNCTION__)); | |||
13205 | V = DAG.getBitcast(ShiftVT, V); | |||
13206 | V = DAG.getNode(Opcode, DL, ShiftVT, V, | |||
13207 | DAG.getTargetConstant(ShiftAmt, DL, MVT::i8)); | |||
13208 | return DAG.getBitcast(VT, V); | |||
13209 | } | |||
13210 | ||||
13211 | // EXTRQ: Extract Len elements from lower half of source, starting at Idx. | |||
13212 | // Remainder of lower half result is zero and upper half is all undef. | |||
13213 | static bool matchShuffleAsEXTRQ(MVT VT, SDValue &V1, SDValue &V2, | |||
13214 | ArrayRef<int> Mask, uint64_t &BitLen, | |||
13215 | uint64_t &BitIdx, const APInt &Zeroable) { | |||
13216 | int Size = Mask.size(); | |||
13217 | int HalfSize = Size / 2; | |||
13218 | assert(Size == (int)VT.getVectorNumElements() && "Unexpected mask size")(static_cast <bool> (Size == (int)VT.getVectorNumElements () && "Unexpected mask size") ? void (0) : __assert_fail ("Size == (int)VT.getVectorNumElements() && \"Unexpected mask size\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13218, __extension__ __PRETTY_FUNCTION__)); | |||
13219 | assert(!Zeroable.isAllOnesValue() && "Fully zeroable shuffle mask")(static_cast <bool> (!Zeroable.isAllOnesValue() && "Fully zeroable shuffle mask") ? void (0) : __assert_fail ("!Zeroable.isAllOnesValue() && \"Fully zeroable shuffle mask\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13219, __extension__ __PRETTY_FUNCTION__)); | |||
13220 | ||||
13221 | // Upper half must be undefined. | |||
13222 | if (!isUndefUpperHalf(Mask)) | |||
13223 | return false; | |||
13224 | ||||
13225 | // Determine the extraction length from the part of the | |||
13226 | // lower half that isn't zeroable. | |||
13227 | int Len = HalfSize; | |||
13228 | for (; Len > 0; --Len) | |||
13229 | if (!Zeroable[Len - 1]) | |||
13230 | break; | |||
13231 | assert(Len > 0 && "Zeroable shuffle mask")(static_cast <bool> (Len > 0 && "Zeroable shuffle mask" ) ? void (0) : __assert_fail ("Len > 0 && \"Zeroable shuffle mask\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13231, __extension__ __PRETTY_FUNCTION__)); | |||
13232 | ||||
13233 | // Attempt to match first Len sequential elements from the lower half. | |||
13234 | SDValue Src; | |||
13235 | int Idx = -1; | |||
13236 | for (int i = 0; i != Len; ++i) { | |||
13237 | int M = Mask[i]; | |||
13238 | if (M == SM_SentinelUndef) | |||
13239 | continue; | |||
13240 | SDValue &V = (M < Size ? V1 : V2); | |||
13241 | M = M % Size; | |||
13242 | ||||
13243 | // The extracted elements must start at a valid index and all mask | |||
13244 | // elements must be in the lower half. | |||
13245 | if (i > M || M >= HalfSize) | |||
13246 | return false; | |||
13247 | ||||
13248 | if (Idx < 0 || (Src == V && Idx == (M - i))) { | |||
13249 | Src = V; | |||
13250 | Idx = M - i; | |||
13251 | continue; | |||
13252 | } | |||
13253 | return false; | |||
13254 | } | |||
13255 | ||||
13256 | if (!Src || Idx < 0) | |||
13257 | return false; | |||
13258 | ||||
13259 | assert((Idx + Len) <= HalfSize && "Illegal extraction mask")(static_cast <bool> ((Idx + Len) <= HalfSize && "Illegal extraction mask") ? void (0) : __assert_fail ("(Idx + Len) <= HalfSize && \"Illegal extraction mask\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13259, __extension__ __PRETTY_FUNCTION__)); | |||
13260 | BitLen = (Len * VT.getScalarSizeInBits()) & 0x3f; | |||
13261 | BitIdx = (Idx * VT.getScalarSizeInBits()) & 0x3f; | |||
13262 | V1 = Src; | |||
13263 | return true; | |||
13264 | } | |||
13265 | ||||
13266 | // INSERTQ: Extract lowest Len elements from lower half of second source and | |||
13267 | // insert over first source, starting at Idx. | |||
13268 | // { A[0], .., A[Idx-1], B[0], .., B[Len-1], A[Idx+Len], .., UNDEF, ... } | |||
13269 | static bool matchShuffleAsINSERTQ(MVT VT, SDValue &V1, SDValue &V2, | |||
13270 | ArrayRef<int> Mask, uint64_t &BitLen, | |||
13271 | uint64_t &BitIdx) { | |||
13272 | int Size = Mask.size(); | |||
13273 | int HalfSize = Size / 2; | |||
13274 | assert(Size == (int)VT.getVectorNumElements() && "Unexpected mask size")(static_cast <bool> (Size == (int)VT.getVectorNumElements () && "Unexpected mask size") ? void (0) : __assert_fail ("Size == (int)VT.getVectorNumElements() && \"Unexpected mask size\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13274, __extension__ __PRETTY_FUNCTION__)); | |||
13275 | ||||
13276 | // Upper half must be undefined. | |||
13277 | if (!isUndefUpperHalf(Mask)) | |||
13278 | return false; | |||
13279 | ||||
13280 | for (int Idx = 0; Idx != HalfSize; ++Idx) { | |||
13281 | SDValue Base; | |||
13282 | ||||
13283 | // Attempt to match first source from mask before insertion point. | |||
13284 | if (isUndefInRange(Mask, 0, Idx)) { | |||
13285 | /* EMPTY */ | |||
13286 | } else if (isSequentialOrUndefInRange(Mask, 0, Idx, 0)) { | |||
13287 | Base = V1; | |||
13288 | } else if (isSequentialOrUndefInRange(Mask, 0, Idx, Size)) { | |||
13289 | Base = V2; | |||
13290 | } else { | |||
13291 | continue; | |||
13292 | } | |||
13293 | ||||
13294 | // Extend the extraction length looking to match both the insertion of | |||
13295 | // the second source and the remaining elements of the first. | |||
13296 | for (int Hi = Idx + 1; Hi <= HalfSize; ++Hi) { | |||
13297 | SDValue Insert; | |||
13298 | int Len = Hi - Idx; | |||
13299 | ||||
13300 | // Match insertion. | |||
13301 | if (isSequentialOrUndefInRange(Mask, Idx, Len, 0)) { | |||
13302 | Insert = V1; | |||
13303 | } else if (isSequentialOrUndefInRange(Mask, Idx, Len, Size)) { | |||
13304 | Insert = V2; | |||
13305 | } else { | |||
13306 | continue; | |||
13307 | } | |||
13308 | ||||
13309 | // Match the remaining elements of the lower half. | |||
13310 | if (isUndefInRange(Mask, Hi, HalfSize - Hi)) { | |||
13311 | /* EMPTY */ | |||
13312 | } else if ((!Base || (Base == V1)) && | |||
13313 | isSequentialOrUndefInRange(Mask, Hi, HalfSize - Hi, Hi)) { | |||
13314 | Base = V1; | |||
13315 | } else if ((!Base || (Base == V2)) && | |||
13316 | isSequentialOrUndefInRange(Mask, Hi, HalfSize - Hi, | |||
13317 | Size + Hi)) { | |||
13318 | Base = V2; | |||
13319 | } else { | |||
13320 | continue; | |||
13321 | } | |||
13322 | ||||
13323 | BitLen = (Len * VT.getScalarSizeInBits()) & 0x3f; | |||
13324 | BitIdx = (Idx * VT.getScalarSizeInBits()) & 0x3f; | |||
13325 | V1 = Base; | |||
13326 | V2 = Insert; | |||
13327 | return true; | |||
13328 | } | |||
13329 | } | |||
13330 | ||||
13331 | return false; | |||
13332 | } | |||
13333 | ||||
13334 | /// Try to lower a vector shuffle using SSE4a EXTRQ/INSERTQ. | |||
13335 | static SDValue lowerShuffleWithSSE4A(const SDLoc &DL, MVT VT, SDValue V1, | |||
13336 | SDValue V2, ArrayRef<int> Mask, | |||
13337 | const APInt &Zeroable, SelectionDAG &DAG) { | |||
13338 | uint64_t BitLen, BitIdx; | |||
13339 | if (matchShuffleAsEXTRQ(VT, V1, V2, Mask, BitLen, BitIdx, Zeroable)) | |||
13340 | return DAG.getNode(X86ISD::EXTRQI, DL, VT, V1, | |||
13341 | DAG.getTargetConstant(BitLen, DL, MVT::i8), | |||
13342 | DAG.getTargetConstant(BitIdx, DL, MVT::i8)); | |||
13343 | ||||
13344 | if (matchShuffleAsINSERTQ(VT, V1, V2, Mask, BitLen, BitIdx)) | |||
13345 | return DAG.getNode(X86ISD::INSERTQI, DL, VT, V1 ? V1 : DAG.getUNDEF(VT), | |||
13346 | V2 ? V2 : DAG.getUNDEF(VT), | |||
13347 | DAG.getTargetConstant(BitLen, DL, MVT::i8), | |||
13348 | DAG.getTargetConstant(BitIdx, DL, MVT::i8)); | |||
13349 | ||||
13350 | return SDValue(); | |||
13351 | } | |||
13352 | ||||
13353 | /// Lower a vector shuffle as a zero or any extension. | |||
13354 | /// | |||
13355 | /// Given a specific number of elements, element bit width, and extension | |||
13356 | /// stride, produce either a zero or any extension based on the available | |||
13357 | /// features of the subtarget. The extended elements are consecutive and | |||
13358 | /// begin and can start from an offsetted element index in the input; to | |||
13359 | /// avoid excess shuffling the offset must either being in the bottom lane | |||
13360 | /// or at the start of a higher lane. All extended elements must be from | |||
13361 | /// the same lane. | |||
13362 | static SDValue lowerShuffleAsSpecificZeroOrAnyExtend( | |||
13363 | const SDLoc &DL, MVT VT, int Scale, int Offset, bool AnyExt, SDValue InputV, | |||
13364 | ArrayRef<int> Mask, const X86Subtarget &Subtarget, SelectionDAG &DAG) { | |||
13365 | assert(Scale > 1 && "Need a scale to extend.")(static_cast <bool> (Scale > 1 && "Need a scale to extend." ) ? void (0) : __assert_fail ("Scale > 1 && \"Need a scale to extend.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13365, __extension__ __PRETTY_FUNCTION__)); | |||
13366 | int EltBits = VT.getScalarSizeInBits(); | |||
13367 | int NumElements = VT.getVectorNumElements(); | |||
13368 | int NumEltsPerLane = 128 / EltBits; | |||
13369 | int OffsetLane = Offset / NumEltsPerLane; | |||
13370 | assert((EltBits == 8 || EltBits == 16 || EltBits == 32) &&(static_cast <bool> ((EltBits == 8 || EltBits == 16 || EltBits == 32) && "Only 8, 16, and 32 bit elements can be extended." ) ? void (0) : __assert_fail ("(EltBits == 8 || EltBits == 16 || EltBits == 32) && \"Only 8, 16, and 32 bit elements can be extended.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13371, __extension__ __PRETTY_FUNCTION__)) | |||
13371 | "Only 8, 16, and 32 bit elements can be extended.")(static_cast <bool> ((EltBits == 8 || EltBits == 16 || EltBits == 32) && "Only 8, 16, and 32 bit elements can be extended." ) ? void (0) : __assert_fail ("(EltBits == 8 || EltBits == 16 || EltBits == 32) && \"Only 8, 16, and 32 bit elements can be extended.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13371, __extension__ __PRETTY_FUNCTION__)); | |||
13372 | assert(Scale * EltBits <= 64 && "Cannot zero extend past 64 bits.")(static_cast <bool> (Scale * EltBits <= 64 && "Cannot zero extend past 64 bits.") ? void (0) : __assert_fail ("Scale * EltBits <= 64 && \"Cannot zero extend past 64 bits.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13372, __extension__ __PRETTY_FUNCTION__)); | |||
13373 | assert(0 <= Offset && "Extension offset must be positive.")(static_cast <bool> (0 <= Offset && "Extension offset must be positive." ) ? void (0) : __assert_fail ("0 <= Offset && \"Extension offset must be positive.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13373, __extension__ __PRETTY_FUNCTION__)); | |||
13374 | assert((Offset < NumEltsPerLane || Offset % NumEltsPerLane == 0) &&(static_cast <bool> ((Offset < NumEltsPerLane || Offset % NumEltsPerLane == 0) && "Extension offset must be in the first lane or start an upper lane." ) ? void (0) : __assert_fail ("(Offset < NumEltsPerLane || Offset % NumEltsPerLane == 0) && \"Extension offset must be in the first lane or start an upper lane.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13375, __extension__ __PRETTY_FUNCTION__)) | |||
13375 | "Extension offset must be in the first lane or start an upper lane.")(static_cast <bool> ((Offset < NumEltsPerLane || Offset % NumEltsPerLane == 0) && "Extension offset must be in the first lane or start an upper lane." ) ? void (0) : __assert_fail ("(Offset < NumEltsPerLane || Offset % NumEltsPerLane == 0) && \"Extension offset must be in the first lane or start an upper lane.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13375, __extension__ __PRETTY_FUNCTION__)); | |||
13376 | ||||
13377 | // Check that an index is in same lane as the base offset. | |||
13378 | auto SafeOffset = [&](int Idx) { | |||
13379 | return OffsetLane == (Idx / NumEltsPerLane); | |||
13380 | }; | |||
13381 | ||||
13382 | // Shift along an input so that the offset base moves to the first element. | |||
13383 | auto ShuffleOffset = [&](SDValue V) { | |||
13384 | if (!Offset) | |||
13385 | return V; | |||
13386 | ||||
13387 | SmallVector<int, 8> ShMask((unsigned)NumElements, -1); | |||
13388 | for (int i = 0; i * Scale < NumElements; ++i) { | |||
13389 | int SrcIdx = i + Offset; | |||
13390 | ShMask[i] = SafeOffset(SrcIdx) ? SrcIdx : -1; | |||
13391 | } | |||
13392 | return DAG.getVectorShuffle(VT, DL, V, DAG.getUNDEF(VT), ShMask); | |||
13393 | }; | |||
13394 | ||||
13395 | // Found a valid a/zext mask! Try various lowering strategies based on the | |||
13396 | // input type and available ISA extensions. | |||
13397 | if (Subtarget.hasSSE41()) { | |||
13398 | // Not worth offsetting 128-bit vectors if scale == 2, a pattern using | |||
13399 | // PUNPCK will catch this in a later shuffle match. | |||
13400 | if (Offset && Scale == 2 && VT.is128BitVector()) | |||
13401 | return SDValue(); | |||
13402 | MVT ExtVT = MVT::getVectorVT(MVT::getIntegerVT(EltBits * Scale), | |||
13403 | NumElements / Scale); | |||
13404 | InputV = ShuffleOffset(InputV); | |||
13405 | InputV = getEXTEND_VECTOR_INREG(AnyExt ? ISD::ANY_EXTEND : ISD::ZERO_EXTEND, | |||
13406 | DL, ExtVT, InputV, DAG); | |||
13407 | return DAG.getBitcast(VT, InputV); | |||
13408 | } | |||
13409 | ||||
13410 | assert(VT.is128BitVector() && "Only 128-bit vectors can be extended.")(static_cast <bool> (VT.is128BitVector() && "Only 128-bit vectors can be extended." ) ? void (0) : __assert_fail ("VT.is128BitVector() && \"Only 128-bit vectors can be extended.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13410, __extension__ __PRETTY_FUNCTION__)); | |||
13411 | ||||
13412 | // For any extends we can cheat for larger element sizes and use shuffle | |||
13413 | // instructions that can fold with a load and/or copy. | |||
13414 | if (AnyExt && EltBits == 32) { | |||
13415 | int PSHUFDMask[4] = {Offset, -1, SafeOffset(Offset + 1) ? Offset + 1 : -1, | |||
13416 | -1}; | |||
13417 | return DAG.getBitcast( | |||
13418 | VT, DAG.getNode(X86ISD::PSHUFD, DL, MVT::v4i32, | |||
13419 | DAG.getBitcast(MVT::v4i32, InputV), | |||
13420 | getV4X86ShuffleImm8ForMask(PSHUFDMask, DL, DAG))); | |||
13421 | } | |||
13422 | if (AnyExt && EltBits == 16 && Scale > 2) { | |||
13423 | int PSHUFDMask[4] = {Offset / 2, -1, | |||
13424 | SafeOffset(Offset + 1) ? (Offset + 1) / 2 : -1, -1}; | |||
13425 | InputV = DAG.getNode(X86ISD::PSHUFD, DL, MVT::v4i32, | |||
13426 | DAG.getBitcast(MVT::v4i32, InputV), | |||
13427 | getV4X86ShuffleImm8ForMask(PSHUFDMask, DL, DAG)); | |||
13428 | int PSHUFWMask[4] = {1, -1, -1, -1}; | |||
13429 | unsigned OddEvenOp = (Offset & 1) ? X86ISD::PSHUFLW : X86ISD::PSHUFHW; | |||
13430 | return DAG.getBitcast( | |||
13431 | VT, DAG.getNode(OddEvenOp, DL, MVT::v8i16, | |||
13432 | DAG.getBitcast(MVT::v8i16, InputV), | |||
13433 | getV4X86ShuffleImm8ForMask(PSHUFWMask, DL, DAG))); | |||
13434 | } | |||
13435 | ||||
13436 | // The SSE4A EXTRQ instruction can efficiently extend the first 2 lanes | |||
13437 | // to 64-bits. | |||
13438 | if ((Scale * EltBits) == 64 && EltBits < 32 && Subtarget.hasSSE4A()) { | |||
13439 | assert(NumElements == (int)Mask.size() && "Unexpected shuffle mask size!")(static_cast <bool> (NumElements == (int)Mask.size() && "Unexpected shuffle mask size!") ? void (0) : __assert_fail ( "NumElements == (int)Mask.size() && \"Unexpected shuffle mask size!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13439, __extension__ __PRETTY_FUNCTION__)); | |||
13440 | assert(VT.is128BitVector() && "Unexpected vector width!")(static_cast <bool> (VT.is128BitVector() && "Unexpected vector width!" ) ? void (0) : __assert_fail ("VT.is128BitVector() && \"Unexpected vector width!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13440, __extension__ __PRETTY_FUNCTION__)); | |||
13441 | ||||
13442 | int LoIdx = Offset * EltBits; | |||
13443 | SDValue Lo = DAG.getBitcast( | |||
13444 | MVT::v2i64, DAG.getNode(X86ISD::EXTRQI, DL, VT, InputV, | |||
13445 | DAG.getTargetConstant(EltBits, DL, MVT::i8), | |||
13446 | DAG.getTargetConstant(LoIdx, DL, MVT::i8))); | |||
13447 | ||||
13448 | if (isUndefUpperHalf(Mask) || !SafeOffset(Offset + 1)) | |||
13449 | return DAG.getBitcast(VT, Lo); | |||
13450 | ||||
13451 | int HiIdx = (Offset + 1) * EltBits; | |||
13452 | SDValue Hi = DAG.getBitcast( | |||
13453 | MVT::v2i64, DAG.getNode(X86ISD::EXTRQI, DL, VT, InputV, | |||
13454 | DAG.getTargetConstant(EltBits, DL, MVT::i8), | |||
13455 | DAG.getTargetConstant(HiIdx, DL, MVT::i8))); | |||
13456 | return DAG.getBitcast(VT, | |||
13457 | DAG.getNode(X86ISD::UNPCKL, DL, MVT::v2i64, Lo, Hi)); | |||
13458 | } | |||
13459 | ||||
13460 | // If this would require more than 2 unpack instructions to expand, use | |||
13461 | // pshufb when available. We can only use more than 2 unpack instructions | |||
13462 | // when zero extending i8 elements which also makes it easier to use pshufb. | |||
13463 | if (Scale > 4 && EltBits == 8 && Subtarget.hasSSSE3()) { | |||
13464 | assert(NumElements == 16 && "Unexpected byte vector width!")(static_cast <bool> (NumElements == 16 && "Unexpected byte vector width!" ) ? void (0) : __assert_fail ("NumElements == 16 && \"Unexpected byte vector width!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13464, __extension__ __PRETTY_FUNCTION__)); | |||
13465 | SDValue PSHUFBMask[16]; | |||
13466 | for (int i = 0; i < 16; ++i) { | |||
13467 | int Idx = Offset + (i / Scale); | |||
13468 | if ((i % Scale == 0 && SafeOffset(Idx))) { | |||
13469 | PSHUFBMask[i] = DAG.getConstant(Idx, DL, MVT::i8); | |||
13470 | continue; | |||
13471 | } | |||
13472 | PSHUFBMask[i] = | |||
13473 | AnyExt ? DAG.getUNDEF(MVT::i8) : DAG.getConstant(0x80, DL, MVT::i8); | |||
13474 | } | |||
13475 | InputV = DAG.getBitcast(MVT::v16i8, InputV); | |||
13476 | return DAG.getBitcast( | |||
13477 | VT, DAG.getNode(X86ISD::PSHUFB, DL, MVT::v16i8, InputV, | |||
13478 | DAG.getBuildVector(MVT::v16i8, DL, PSHUFBMask))); | |||
13479 | } | |||
13480 | ||||
13481 | // If we are extending from an offset, ensure we start on a boundary that | |||
13482 | // we can unpack from. | |||
13483 | int AlignToUnpack = Offset % (NumElements / Scale); | |||
13484 | if (AlignToUnpack) { | |||
13485 | SmallVector<int, 8> ShMask((unsigned)NumElements, -1); | |||
13486 | for (int i = AlignToUnpack; i < NumElements; ++i) | |||
13487 | ShMask[i - AlignToUnpack] = i; | |||
13488 | InputV = DAG.getVectorShuffle(VT, DL, InputV, DAG.getUNDEF(VT), ShMask); | |||
13489 | Offset -= AlignToUnpack; | |||
13490 | } | |||
13491 | ||||
13492 | // Otherwise emit a sequence of unpacks. | |||
13493 | do { | |||
13494 | unsigned UnpackLoHi = X86ISD::UNPCKL; | |||
13495 | if (Offset >= (NumElements / 2)) { | |||
13496 | UnpackLoHi = X86ISD::UNPCKH; | |||
13497 | Offset -= (NumElements / 2); | |||
13498 | } | |||
13499 | ||||
13500 | MVT InputVT = MVT::getVectorVT(MVT::getIntegerVT(EltBits), NumElements); | |||
13501 | SDValue Ext = AnyExt ? DAG.getUNDEF(InputVT) | |||
13502 | : getZeroVector(InputVT, Subtarget, DAG, DL); | |||
13503 | InputV = DAG.getBitcast(InputVT, InputV); | |||
13504 | InputV = DAG.getNode(UnpackLoHi, DL, InputVT, InputV, Ext); | |||
13505 | Scale /= 2; | |||
13506 | EltBits *= 2; | |||
13507 | NumElements /= 2; | |||
13508 | } while (Scale > 1); | |||
13509 | return DAG.getBitcast(VT, InputV); | |||
13510 | } | |||
13511 | ||||
13512 | /// Try to lower a vector shuffle as a zero extension on any microarch. | |||
13513 | /// | |||
13514 | /// This routine will try to do everything in its power to cleverly lower | |||
13515 | /// a shuffle which happens to match the pattern of a zero extend. It doesn't | |||
13516 | /// check for the profitability of this lowering, it tries to aggressively | |||
13517 | /// match this pattern. It will use all of the micro-architectural details it | |||
13518 | /// can to emit an efficient lowering. It handles both blends with all-zero | |||
13519 | /// inputs to explicitly zero-extend and undef-lanes (sometimes undef due to | |||
13520 | /// masking out later). | |||
13521 | /// | |||
13522 | /// The reason we have dedicated lowering for zext-style shuffles is that they | |||
13523 | /// are both incredibly common and often quite performance sensitive. | |||
13524 | static SDValue lowerShuffleAsZeroOrAnyExtend( | |||
13525 | const SDLoc &DL, MVT VT, SDValue V1, SDValue V2, ArrayRef<int> Mask, | |||
13526 | const APInt &Zeroable, const X86Subtarget &Subtarget, | |||
13527 | SelectionDAG &DAG) { | |||
13528 | int Bits = VT.getSizeInBits(); | |||
13529 | int NumLanes = Bits / 128; | |||
13530 | int NumElements = VT.getVectorNumElements(); | |||
13531 | int NumEltsPerLane = NumElements / NumLanes; | |||
13532 | assert(VT.getScalarSizeInBits() <= 32 &&(static_cast <bool> (VT.getScalarSizeInBits() <= 32 && "Exceeds 32-bit integer zero extension limit") ? void (0) : __assert_fail ("VT.getScalarSizeInBits() <= 32 && \"Exceeds 32-bit integer zero extension limit\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13533, __extension__ __PRETTY_FUNCTION__)) | |||
13533 | "Exceeds 32-bit integer zero extension limit")(static_cast <bool> (VT.getScalarSizeInBits() <= 32 && "Exceeds 32-bit integer zero extension limit") ? void (0) : __assert_fail ("VT.getScalarSizeInBits() <= 32 && \"Exceeds 32-bit integer zero extension limit\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13533, __extension__ __PRETTY_FUNCTION__)); | |||
13534 | assert((int)Mask.size() == NumElements && "Unexpected shuffle mask size")(static_cast <bool> ((int)Mask.size() == NumElements && "Unexpected shuffle mask size") ? void (0) : __assert_fail ( "(int)Mask.size() == NumElements && \"Unexpected shuffle mask size\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13534, __extension__ __PRETTY_FUNCTION__)); | |||
13535 | ||||
13536 | // Define a helper function to check a particular ext-scale and lower to it if | |||
13537 | // valid. | |||
13538 | auto Lower = [&](int Scale) -> SDValue { | |||
13539 | SDValue InputV; | |||
13540 | bool AnyExt = true; | |||
13541 | int Offset = 0; | |||
13542 | int Matches = 0; | |||
13543 | for (int i = 0; i < NumElements; ++i) { | |||
13544 | int M = Mask[i]; | |||
13545 | if (M < 0) | |||
13546 | continue; // Valid anywhere but doesn't tell us anything. | |||
13547 | if (i % Scale != 0) { | |||
13548 | // Each of the extended elements need to be zeroable. | |||
13549 | if (!Zeroable[i]) | |||
13550 | return SDValue(); | |||
13551 | ||||
13552 | // We no longer are in the anyext case. | |||
13553 | AnyExt = false; | |||
13554 | continue; | |||
13555 | } | |||
13556 | ||||
13557 | // Each of the base elements needs to be consecutive indices into the | |||
13558 | // same input vector. | |||
13559 | SDValue V = M < NumElements ? V1 : V2; | |||
13560 | M = M % NumElements; | |||
13561 | if (!InputV) { | |||
13562 | InputV = V; | |||
13563 | Offset = M - (i / Scale); | |||
13564 | } else if (InputV != V) | |||
13565 | return SDValue(); // Flip-flopping inputs. | |||
13566 | ||||
13567 | // Offset must start in the lowest 128-bit lane or at the start of an | |||
13568 | // upper lane. | |||
13569 | // FIXME: Is it ever worth allowing a negative base offset? | |||
13570 | if (!((0 <= Offset && Offset < NumEltsPerLane) || | |||
13571 | (Offset % NumEltsPerLane) == 0)) | |||
13572 | return SDValue(); | |||
13573 | ||||
13574 | // If we are offsetting, all referenced entries must come from the same | |||
13575 | // lane. | |||
13576 | if (Offset && (Offset / NumEltsPerLane) != (M / NumEltsPerLane)) | |||
13577 | return SDValue(); | |||
13578 | ||||
13579 | if ((M % NumElements) != (Offset + (i / Scale))) | |||
13580 | return SDValue(); // Non-consecutive strided elements. | |||
13581 | Matches++; | |||
13582 | } | |||
13583 | ||||
13584 | // If we fail to find an input, we have a zero-shuffle which should always | |||
13585 | // have already been handled. | |||
13586 | // FIXME: Maybe handle this here in case during blending we end up with one? | |||
13587 | if (!InputV) | |||
13588 | return SDValue(); | |||
13589 | ||||
13590 | // If we are offsetting, don't extend if we only match a single input, we | |||
13591 | // can always do better by using a basic PSHUF or PUNPCK. | |||
13592 | if (Offset != 0 && Matches < 2) | |||
13593 | return SDValue(); | |||
13594 | ||||
13595 | return lowerShuffleAsSpecificZeroOrAnyExtend(DL, VT, Scale, Offset, AnyExt, | |||
13596 | InputV, Mask, Subtarget, DAG); | |||
13597 | }; | |||
13598 | ||||
13599 | // The widest scale possible for extending is to a 64-bit integer. | |||
13600 | assert(Bits % 64 == 0 &&(static_cast <bool> (Bits % 64 == 0 && "The number of bits in a vector must be divisible by 64 on x86!" ) ? void (0) : __assert_fail ("Bits % 64 == 0 && \"The number of bits in a vector must be divisible by 64 on x86!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13601, __extension__ __PRETTY_FUNCTION__)) | |||
13601 | "The number of bits in a vector must be divisible by 64 on x86!")(static_cast <bool> (Bits % 64 == 0 && "The number of bits in a vector must be divisible by 64 on x86!" ) ? void (0) : __assert_fail ("Bits % 64 == 0 && \"The number of bits in a vector must be divisible by 64 on x86!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13601, __extension__ __PRETTY_FUNCTION__)); | |||
13602 | int NumExtElements = Bits / 64; | |||
13603 | ||||
13604 | // Each iteration, try extending the elements half as much, but into twice as | |||
13605 | // many elements. | |||
13606 | for (; NumExtElements < NumElements; NumExtElements *= 2) { | |||
13607 | assert(NumElements % NumExtElements == 0 &&(static_cast <bool> (NumElements % NumExtElements == 0 && "The input vector size must be divisible by the extended size." ) ? void (0) : __assert_fail ("NumElements % NumExtElements == 0 && \"The input vector size must be divisible by the extended size.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13608, __extension__ __PRETTY_FUNCTION__)) | |||
13608 | "The input vector size must be divisible by the extended size.")(static_cast <bool> (NumElements % NumExtElements == 0 && "The input vector size must be divisible by the extended size." ) ? void (0) : __assert_fail ("NumElements % NumExtElements == 0 && \"The input vector size must be divisible by the extended size.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13608, __extension__ __PRETTY_FUNCTION__)); | |||
13609 | if (SDValue V = Lower(NumElements / NumExtElements)) | |||
13610 | return V; | |||
13611 | } | |||
13612 | ||||
13613 | // General extends failed, but 128-bit vectors may be able to use MOVQ. | |||
13614 | if (Bits != 128) | |||
13615 | return SDValue(); | |||
13616 | ||||
13617 | // Returns one of the source operands if the shuffle can be reduced to a | |||
13618 | // MOVQ, copying the lower 64-bits and zero-extending to the upper 64-bits. | |||
13619 | auto CanZExtLowHalf = [&]() { | |||
13620 | for (int i = NumElements / 2; i != NumElements; ++i) | |||
13621 | if (!Zeroable[i]) | |||
13622 | return SDValue(); | |||
13623 | if (isSequentialOrUndefInRange(Mask, 0, NumElements / 2, 0)) | |||
13624 | return V1; | |||
13625 | if (isSequentialOrUndefInRange(Mask, 0, NumElements / 2, NumElements)) | |||
13626 | return V2; | |||
13627 | return SDValue(); | |||
13628 | }; | |||
13629 | ||||
13630 | if (SDValue V = CanZExtLowHalf()) { | |||
13631 | V = DAG.getBitcast(MVT::v2i64, V); | |||
13632 | V = DAG.getNode(X86ISD::VZEXT_MOVL, DL, MVT::v2i64, V); | |||
13633 | return DAG.getBitcast(VT, V); | |||
13634 | } | |||
13635 | ||||
13636 | // No viable ext lowering found. | |||
13637 | return SDValue(); | |||
13638 | } | |||
13639 | ||||
13640 | /// Try to get a scalar value for a specific element of a vector. | |||
13641 | /// | |||
13642 | /// Looks through BUILD_VECTOR and SCALAR_TO_VECTOR nodes to find a scalar. | |||
13643 | static SDValue getScalarValueForVectorElement(SDValue V, int Idx, | |||
13644 | SelectionDAG &DAG) { | |||
13645 | MVT VT = V.getSimpleValueType(); | |||
13646 | MVT EltVT = VT.getVectorElementType(); | |||
13647 | V = peekThroughBitcasts(V); | |||
13648 | ||||
13649 | // If the bitcasts shift the element size, we can't extract an equivalent | |||
13650 | // element from it. | |||
13651 | MVT NewVT = V.getSimpleValueType(); | |||
13652 | if (!NewVT.isVector() || NewVT.getScalarSizeInBits() != VT.getScalarSizeInBits()) | |||
13653 | return SDValue(); | |||
13654 | ||||
13655 | if (V.getOpcode() == ISD::BUILD_VECTOR || | |||
13656 | (Idx == 0 && V.getOpcode() == ISD::SCALAR_TO_VECTOR)) { | |||
13657 | // Ensure the scalar operand is the same size as the destination. | |||
13658 | // FIXME: Add support for scalar truncation where possible. | |||
13659 | SDValue S = V.getOperand(Idx); | |||
13660 | if (EltVT.getSizeInBits() == S.getSimpleValueType().getSizeInBits()) | |||
13661 | return DAG.getBitcast(EltVT, S); | |||
13662 | } | |||
13663 | ||||
13664 | return SDValue(); | |||
13665 | } | |||
13666 | ||||
13667 | /// Helper to test for a load that can be folded with x86 shuffles. | |||
13668 | /// | |||
13669 | /// This is particularly important because the set of instructions varies | |||
13670 | /// significantly based on whether the operand is a load or not. | |||
13671 | static bool isShuffleFoldableLoad(SDValue V) { | |||
13672 | V = peekThroughBitcasts(V); | |||
13673 | return ISD::isNON_EXTLoad(V.getNode()); | |||
13674 | } | |||
13675 | ||||
13676 | /// Try to lower insertion of a single element into a zero vector. | |||
13677 | /// | |||
13678 | /// This is a common pattern that we have especially efficient patterns to lower | |||
13679 | /// across all subtarget feature sets. | |||
13680 | static SDValue lowerShuffleAsElementInsertion( | |||
13681 | const SDLoc &DL, MVT VT, SDValue V1, SDValue V2, ArrayRef<int> Mask, | |||
13682 | const APInt &Zeroable, const X86Subtarget &Subtarget, | |||
13683 | SelectionDAG &DAG) { | |||
13684 | MVT ExtVT = VT; | |||
13685 | MVT EltVT = VT.getVectorElementType(); | |||
13686 | ||||
13687 | int V2Index = | |||
13688 | find_if(Mask, [&Mask](int M) { return M >= (int)Mask.size(); }) - | |||
13689 | Mask.begin(); | |||
13690 | bool IsV1Zeroable = true; | |||
13691 | for (int i = 0, Size = Mask.size(); i < Size; ++i) | |||
13692 | if (i != V2Index && !Zeroable[i]) { | |||
13693 | IsV1Zeroable = false; | |||
13694 | break; | |||
13695 | } | |||
13696 | ||||
13697 | // Check for a single input from a SCALAR_TO_VECTOR node. | |||
13698 | // FIXME: All of this should be canonicalized into INSERT_VECTOR_ELT and | |||
13699 | // all the smarts here sunk into that routine. However, the current | |||
13700 | // lowering of BUILD_VECTOR makes that nearly impossible until the old | |||
13701 | // vector shuffle lowering is dead. | |||
13702 | SDValue V2S = getScalarValueForVectorElement(V2, Mask[V2Index] - Mask.size(), | |||
13703 | DAG); | |||
13704 | if (V2S && DAG.getTargetLoweringInfo().isTypeLegal(V2S.getValueType())) { | |||
13705 | // We need to zext the scalar if it is smaller than an i32. | |||
13706 | V2S = DAG.getBitcast(EltVT, V2S); | |||
13707 | if (EltVT == MVT::i8 || (EltVT == MVT::i16 && !Subtarget.hasFP16())) { | |||
13708 | // Using zext to expand a narrow element won't work for non-zero | |||
13709 | // insertions. | |||
13710 | if (!IsV1Zeroable) | |||
13711 | return SDValue(); | |||
13712 | ||||
13713 | // Zero-extend directly to i32. | |||
13714 | ExtVT = MVT::getVectorVT(MVT::i32, ExtVT.getSizeInBits() / 32); | |||
13715 | V2S = DAG.getNode(ISD::ZERO_EXTEND, DL, MVT::i32, V2S); | |||
13716 | } | |||
13717 | V2 = DAG.getNode(ISD::SCALAR_TO_VECTOR, DL, ExtVT, V2S); | |||
13718 | } else if (Mask[V2Index] != (int)Mask.size() || EltVT == MVT::i8 || | |||
13719 | EltVT == MVT::i16) { | |||
13720 | // Either not inserting from the low element of the input or the input | |||
13721 | // element size is too small to use VZEXT_MOVL to clear the high bits. | |||
13722 | return SDValue(); | |||
13723 | } | |||
13724 | ||||
13725 | if (!IsV1Zeroable) { | |||
13726 | // If V1 can't be treated as a zero vector we have fewer options to lower | |||
13727 | // this. We can't support integer vectors or non-zero targets cheaply, and | |||
13728 | // the V1 elements can't be permuted in any way. | |||
13729 | assert(VT == ExtVT && "Cannot change extended type when non-zeroable!")(static_cast <bool> (VT == ExtVT && "Cannot change extended type when non-zeroable!" ) ? void (0) : __assert_fail ("VT == ExtVT && \"Cannot change extended type when non-zeroable!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13729, __extension__ __PRETTY_FUNCTION__)); | |||
13730 | if (!VT.isFloatingPoint() || V2Index != 0) | |||
13731 | return SDValue(); | |||
13732 | SmallVector<int, 8> V1Mask(Mask.begin(), Mask.end()); | |||
13733 | V1Mask[V2Index] = -1; | |||
13734 | if (!isNoopShuffleMask(V1Mask)) | |||
13735 | return SDValue(); | |||
13736 | if (!VT.is128BitVector()) | |||
13737 | return SDValue(); | |||
13738 | ||||
13739 | // Otherwise, use MOVSD, MOVSS or MOVSH. | |||
13740 | unsigned MovOpc = 0; | |||
13741 | if (EltVT == MVT::f16) | |||
13742 | MovOpc = X86ISD::MOVSH; | |||
13743 | else if (EltVT == MVT::f32) | |||
13744 | MovOpc = X86ISD::MOVSS; | |||
13745 | else if (EltVT == MVT::f64) | |||
13746 | MovOpc = X86ISD::MOVSD; | |||
13747 | else | |||
13748 | llvm_unreachable("Unsupported floating point element type to handle!")::llvm::llvm_unreachable_internal("Unsupported floating point element type to handle!" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13748); | |||
13749 | return DAG.getNode(MovOpc, DL, ExtVT, V1, V2); | |||
13750 | } | |||
13751 | ||||
13752 | // This lowering only works for the low element with floating point vectors. | |||
13753 | if (VT.isFloatingPoint() && V2Index != 0) | |||
13754 | return SDValue(); | |||
13755 | ||||
13756 | V2 = DAG.getNode(X86ISD::VZEXT_MOVL, DL, ExtVT, V2); | |||
13757 | if (ExtVT != VT) | |||
13758 | V2 = DAG.getBitcast(VT, V2); | |||
13759 | ||||
13760 | if (V2Index != 0) { | |||
13761 | // If we have 4 or fewer lanes we can cheaply shuffle the element into | |||
13762 | // the desired position. Otherwise it is more efficient to do a vector | |||
13763 | // shift left. We know that we can do a vector shift left because all | |||
13764 | // the inputs are zero. | |||
13765 | if (VT.isFloatingPoint() || VT.getVectorNumElements() <= 4) { | |||
13766 | SmallVector<int, 4> V2Shuffle(Mask.size(), 1); | |||
13767 | V2Shuffle[V2Index] = 0; | |||
13768 | V2 = DAG.getVectorShuffle(VT, DL, V2, DAG.getUNDEF(VT), V2Shuffle); | |||
13769 | } else { | |||
13770 | V2 = DAG.getBitcast(MVT::v16i8, V2); | |||
13771 | V2 = DAG.getNode(X86ISD::VSHLDQ, DL, MVT::v16i8, V2, | |||
13772 | DAG.getTargetConstant( | |||
13773 | V2Index * EltVT.getSizeInBits() / 8, DL, MVT::i8)); | |||
13774 | V2 = DAG.getBitcast(VT, V2); | |||
13775 | } | |||
13776 | } | |||
13777 | return V2; | |||
13778 | } | |||
13779 | ||||
13780 | /// Try to lower broadcast of a single - truncated - integer element, | |||
13781 | /// coming from a scalar_to_vector/build_vector node \p V0 with larger elements. | |||
13782 | /// | |||
13783 | /// This assumes we have AVX2. | |||
13784 | static SDValue lowerShuffleAsTruncBroadcast(const SDLoc &DL, MVT VT, SDValue V0, | |||
13785 | int BroadcastIdx, | |||
13786 | const X86Subtarget &Subtarget, | |||
13787 | SelectionDAG &DAG) { | |||
13788 | assert(Subtarget.hasAVX2() &&(static_cast <bool> (Subtarget.hasAVX2() && "We can only lower integer broadcasts with AVX2!" ) ? void (0) : __assert_fail ("Subtarget.hasAVX2() && \"We can only lower integer broadcasts with AVX2!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13789, __extension__ __PRETTY_FUNCTION__)) | |||
13789 | "We can only lower integer broadcasts with AVX2!")(static_cast <bool> (Subtarget.hasAVX2() && "We can only lower integer broadcasts with AVX2!" ) ? void (0) : __assert_fail ("Subtarget.hasAVX2() && \"We can only lower integer broadcasts with AVX2!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13789, __extension__ __PRETTY_FUNCTION__)); | |||
13790 | ||||
13791 | MVT EltVT = VT.getVectorElementType(); | |||
13792 | MVT V0VT = V0.getSimpleValueType(); | |||
13793 | ||||
13794 | assert(VT.isInteger() && "Unexpected non-integer trunc broadcast!")(static_cast <bool> (VT.isInteger() && "Unexpected non-integer trunc broadcast!" ) ? void (0) : __assert_fail ("VT.isInteger() && \"Unexpected non-integer trunc broadcast!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13794, __extension__ __PRETTY_FUNCTION__)); | |||
13795 | assert(V0VT.isVector() && "Unexpected non-vector vector-sized value!")(static_cast <bool> (V0VT.isVector() && "Unexpected non-vector vector-sized value!" ) ? void (0) : __assert_fail ("V0VT.isVector() && \"Unexpected non-vector vector-sized value!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13795, __extension__ __PRETTY_FUNCTION__)); | |||
13796 | ||||
13797 | MVT V0EltVT = V0VT.getVectorElementType(); | |||
13798 | if (!V0EltVT.isInteger()) | |||
13799 | return SDValue(); | |||
13800 | ||||
13801 | const unsigned EltSize = EltVT.getSizeInBits(); | |||
13802 | const unsigned V0EltSize = V0EltVT.getSizeInBits(); | |||
13803 | ||||
13804 | // This is only a truncation if the original element type is larger. | |||
13805 | if (V0EltSize <= EltSize) | |||
13806 | return SDValue(); | |||
13807 | ||||
13808 | assert(((V0EltSize % EltSize) == 0) &&(static_cast <bool> (((V0EltSize % EltSize) == 0) && "Scalar type sizes must all be powers of 2 on x86!") ? void ( 0) : __assert_fail ("((V0EltSize % EltSize) == 0) && \"Scalar type sizes must all be powers of 2 on x86!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13809, __extension__ __PRETTY_FUNCTION__)) | |||
13809 | "Scalar type sizes must all be powers of 2 on x86!")(static_cast <bool> (((V0EltSize % EltSize) == 0) && "Scalar type sizes must all be powers of 2 on x86!") ? void ( 0) : __assert_fail ("((V0EltSize % EltSize) == 0) && \"Scalar type sizes must all be powers of 2 on x86!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13809, __extension__ __PRETTY_FUNCTION__)); | |||
13810 | ||||
13811 | const unsigned V0Opc = V0.getOpcode(); | |||
13812 | const unsigned Scale = V0EltSize / EltSize; | |||
13813 | const unsigned V0BroadcastIdx = BroadcastIdx / Scale; | |||
13814 | ||||
13815 | if ((V0Opc != ISD::SCALAR_TO_VECTOR || V0BroadcastIdx != 0) && | |||
13816 | V0Opc != ISD::BUILD_VECTOR) | |||
13817 | return SDValue(); | |||
13818 | ||||
13819 | SDValue Scalar = V0.getOperand(V0BroadcastIdx); | |||
13820 | ||||
13821 | // If we're extracting non-least-significant bits, shift so we can truncate. | |||
13822 | // Hopefully, we can fold away the trunc/srl/load into the broadcast. | |||
13823 | // Even if we can't (and !isShuffleFoldableLoad(Scalar)), prefer | |||
13824 | // vpbroadcast+vmovd+shr to vpshufb(m)+vmovd. | |||
13825 | if (const int OffsetIdx = BroadcastIdx % Scale) | |||
13826 | Scalar = DAG.getNode(ISD::SRL, DL, Scalar.getValueType(), Scalar, | |||
13827 | DAG.getConstant(OffsetIdx * EltSize, DL, MVT::i8)); | |||
13828 | ||||
13829 | return DAG.getNode(X86ISD::VBROADCAST, DL, VT, | |||
13830 | DAG.getNode(ISD::TRUNCATE, DL, EltVT, Scalar)); | |||
13831 | } | |||
13832 | ||||
13833 | /// Test whether this can be lowered with a single SHUFPS instruction. | |||
13834 | /// | |||
13835 | /// This is used to disable more specialized lowerings when the shufps lowering | |||
13836 | /// will happen to be efficient. | |||
13837 | static bool isSingleSHUFPSMask(ArrayRef<int> Mask) { | |||
13838 | // This routine only handles 128-bit shufps. | |||
13839 | assert(Mask.size() == 4 && "Unsupported mask size!")(static_cast <bool> (Mask.size() == 4 && "Unsupported mask size!" ) ? void (0) : __assert_fail ("Mask.size() == 4 && \"Unsupported mask size!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13839, __extension__ __PRETTY_FUNCTION__)); | |||
13840 | assert(Mask[0] >= -1 && Mask[0] < 8 && "Out of bound mask element!")(static_cast <bool> (Mask[0] >= -1 && Mask[0 ] < 8 && "Out of bound mask element!") ? void (0) : __assert_fail ("Mask[0] >= -1 && Mask[0] < 8 && \"Out of bound mask element!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13840, __extension__ __PRETTY_FUNCTION__)); | |||
13841 | assert(Mask[1] >= -1 && Mask[1] < 8 && "Out of bound mask element!")(static_cast <bool> (Mask[1] >= -1 && Mask[1 ] < 8 && "Out of bound mask element!") ? void (0) : __assert_fail ("Mask[1] >= -1 && Mask[1] < 8 && \"Out of bound mask element!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13841, __extension__ __PRETTY_FUNCTION__)); | |||
13842 | assert(Mask[2] >= -1 && Mask[2] < 8 && "Out of bound mask element!")(static_cast <bool> (Mask[2] >= -1 && Mask[2 ] < 8 && "Out of bound mask element!") ? void (0) : __assert_fail ("Mask[2] >= -1 && Mask[2] < 8 && \"Out of bound mask element!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13842, __extension__ __PRETTY_FUNCTION__)); | |||
13843 | assert(Mask[3] >= -1 && Mask[3] < 8 && "Out of bound mask element!")(static_cast <bool> (Mask[3] >= -1 && Mask[3 ] < 8 && "Out of bound mask element!") ? void (0) : __assert_fail ("Mask[3] >= -1 && Mask[3] < 8 && \"Out of bound mask element!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13843, __extension__ __PRETTY_FUNCTION__)); | |||
13844 | ||||
13845 | // To lower with a single SHUFPS we need to have the low half and high half | |||
13846 | // each requiring a single input. | |||
13847 | if (Mask[0] >= 0 && Mask[1] >= 0 && (Mask[0] < 4) != (Mask[1] < 4)) | |||
13848 | return false; | |||
13849 | if (Mask[2] >= 0 && Mask[3] >= 0 && (Mask[2] < 4) != (Mask[3] < 4)) | |||
13850 | return false; | |||
13851 | ||||
13852 | return true; | |||
13853 | } | |||
13854 | ||||
13855 | /// If we are extracting two 128-bit halves of a vector and shuffling the | |||
13856 | /// result, match that to a 256-bit AVX2 vperm* instruction to avoid a | |||
13857 | /// multi-shuffle lowering. | |||
13858 | static SDValue lowerShuffleOfExtractsAsVperm(const SDLoc &DL, SDValue N0, | |||
13859 | SDValue N1, ArrayRef<int> Mask, | |||
13860 | SelectionDAG &DAG) { | |||
13861 | MVT VT = N0.getSimpleValueType(); | |||
13862 | assert((VT.is128BitVector() &&(static_cast <bool> ((VT.is128BitVector() && (VT .getScalarSizeInBits() == 32 || VT.getScalarSizeInBits() == 64 )) && "VPERM* family of shuffles requires 32-bit or 64-bit elements" ) ? void (0) : __assert_fail ("(VT.is128BitVector() && (VT.getScalarSizeInBits() == 32 || VT.getScalarSizeInBits() == 64)) && \"VPERM* family of shuffles requires 32-bit or 64-bit elements\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13864, __extension__ __PRETTY_FUNCTION__)) | |||
13863 | (VT.getScalarSizeInBits() == 32 || VT.getScalarSizeInBits() == 64)) &&(static_cast <bool> ((VT.is128BitVector() && (VT .getScalarSizeInBits() == 32 || VT.getScalarSizeInBits() == 64 )) && "VPERM* family of shuffles requires 32-bit or 64-bit elements" ) ? void (0) : __assert_fail ("(VT.is128BitVector() && (VT.getScalarSizeInBits() == 32 || VT.getScalarSizeInBits() == 64)) && \"VPERM* family of shuffles requires 32-bit or 64-bit elements\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13864, __extension__ __PRETTY_FUNCTION__)) | |||
13864 | "VPERM* family of shuffles requires 32-bit or 64-bit elements")(static_cast <bool> ((VT.is128BitVector() && (VT .getScalarSizeInBits() == 32 || VT.getScalarSizeInBits() == 64 )) && "VPERM* family of shuffles requires 32-bit or 64-bit elements" ) ? void (0) : __assert_fail ("(VT.is128BitVector() && (VT.getScalarSizeInBits() == 32 || VT.getScalarSizeInBits() == 64)) && \"VPERM* family of shuffles requires 32-bit or 64-bit elements\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13864, __extension__ __PRETTY_FUNCTION__)); | |||
13865 | ||||
13866 | // Check that both sources are extracts of the same source vector. | |||
13867 | if (!N0.hasOneUse() || !N1.hasOneUse() || | |||
13868 | N0.getOpcode() != ISD::EXTRACT_SUBVECTOR || | |||
13869 | N1.getOpcode() != ISD::EXTRACT_SUBVECTOR || | |||
13870 | N0.getOperand(0) != N1.getOperand(0)) | |||
13871 | return SDValue(); | |||
13872 | ||||
13873 | SDValue WideVec = N0.getOperand(0); | |||
13874 | MVT WideVT = WideVec.getSimpleValueType(); | |||
13875 | if (!WideVT.is256BitVector()) | |||
13876 | return SDValue(); | |||
13877 | ||||
13878 | // Match extracts of each half of the wide source vector. Commute the shuffle | |||
13879 | // if the extract of the low half is N1. | |||
13880 | unsigned NumElts = VT.getVectorNumElements(); | |||
13881 | SmallVector<int, 4> NewMask(Mask.begin(), Mask.end()); | |||
13882 | const APInt &ExtIndex0 = N0.getConstantOperandAPInt(1); | |||
13883 | const APInt &ExtIndex1 = N1.getConstantOperandAPInt(1); | |||
13884 | if (ExtIndex1 == 0 && ExtIndex0 == NumElts) | |||
13885 | ShuffleVectorSDNode::commuteMask(NewMask); | |||
13886 | else if (ExtIndex0 != 0 || ExtIndex1 != NumElts) | |||
13887 | return SDValue(); | |||
13888 | ||||
13889 | // Final bailout: if the mask is simple, we are better off using an extract | |||
13890 | // and a simple narrow shuffle. Prefer extract+unpack(h/l)ps to vpermps | |||
13891 | // because that avoids a constant load from memory. | |||
13892 | if (NumElts == 4 && | |||
13893 | (isSingleSHUFPSMask(NewMask) || is128BitUnpackShuffleMask(NewMask))) | |||
13894 | return SDValue(); | |||
13895 | ||||
13896 | // Extend the shuffle mask with undef elements. | |||
13897 | NewMask.append(NumElts, -1); | |||
13898 | ||||
13899 | // shuf (extract X, 0), (extract X, 4), M --> extract (shuf X, undef, M'), 0 | |||
13900 | SDValue Shuf = DAG.getVectorShuffle(WideVT, DL, WideVec, DAG.getUNDEF(WideVT), | |||
13901 | NewMask); | |||
13902 | // This is free: ymm -> xmm. | |||
13903 | return DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, VT, Shuf, | |||
13904 | DAG.getIntPtrConstant(0, DL)); | |||
13905 | } | |||
13906 | ||||
13907 | /// Try to lower broadcast of a single element. | |||
13908 | /// | |||
13909 | /// For convenience, this code also bundles all of the subtarget feature set | |||
13910 | /// filtering. While a little annoying to re-dispatch on type here, there isn't | |||
13911 | /// a convenient way to factor it out. | |||
13912 | static SDValue lowerShuffleAsBroadcast(const SDLoc &DL, MVT VT, SDValue V1, | |||
13913 | SDValue V2, ArrayRef<int> Mask, | |||
13914 | const X86Subtarget &Subtarget, | |||
13915 | SelectionDAG &DAG) { | |||
13916 | if (!((Subtarget.hasSSE3() && VT == MVT::v2f64) || | |||
13917 | (Subtarget.hasAVX() && VT.isFloatingPoint()) || | |||
13918 | (Subtarget.hasAVX2() && VT.isInteger()))) | |||
13919 | return SDValue(); | |||
13920 | ||||
13921 | // With MOVDDUP (v2f64) we can broadcast from a register or a load, otherwise | |||
13922 | // we can only broadcast from a register with AVX2. | |||
13923 | unsigned NumEltBits = VT.getScalarSizeInBits(); | |||
13924 | unsigned Opcode = (VT == MVT::v2f64 && !Subtarget.hasAVX2()) | |||
13925 | ? X86ISD::MOVDDUP | |||
13926 | : X86ISD::VBROADCAST; | |||
13927 | bool BroadcastFromReg = (Opcode == X86ISD::MOVDDUP) || Subtarget.hasAVX2(); | |||
13928 | ||||
13929 | // Check that the mask is a broadcast. | |||
13930 | int BroadcastIdx = getSplatIndex(Mask); | |||
13931 | if (BroadcastIdx < 0) | |||
13932 | return SDValue(); | |||
13933 | assert(BroadcastIdx < (int)Mask.size() && "We only expect to be called with "(static_cast <bool> (BroadcastIdx < (int)Mask.size() && "We only expect to be called with " "a sorted mask where the broadcast " "comes from V1.") ? void (0) : __assert_fail ("BroadcastIdx < (int)Mask.size() && \"We only expect to be called with \" \"a sorted mask where the broadcast \" \"comes from V1.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13935, __extension__ __PRETTY_FUNCTION__)) | |||
13934 | "a sorted mask where the broadcast "(static_cast <bool> (BroadcastIdx < (int)Mask.size() && "We only expect to be called with " "a sorted mask where the broadcast " "comes from V1.") ? void (0) : __assert_fail ("BroadcastIdx < (int)Mask.size() && \"We only expect to be called with \" \"a sorted mask where the broadcast \" \"comes from V1.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13935, __extension__ __PRETTY_FUNCTION__)) | |||
13935 | "comes from V1.")(static_cast <bool> (BroadcastIdx < (int)Mask.size() && "We only expect to be called with " "a sorted mask where the broadcast " "comes from V1.") ? void (0) : __assert_fail ("BroadcastIdx < (int)Mask.size() && \"We only expect to be called with \" \"a sorted mask where the broadcast \" \"comes from V1.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13935, __extension__ __PRETTY_FUNCTION__)); | |||
13936 | ||||
13937 | // Go up the chain of (vector) values to find a scalar load that we can | |||
13938 | // combine with the broadcast. | |||
13939 | // TODO: Combine this logic with findEltLoadSrc() used by | |||
13940 | // EltsFromConsecutiveLoads(). | |||
13941 | int BitOffset = BroadcastIdx * NumEltBits; | |||
13942 | SDValue V = V1; | |||
13943 | for (;;) { | |||
13944 | switch (V.getOpcode()) { | |||
13945 | case ISD::BITCAST: { | |||
13946 | V = V.getOperand(0); | |||
13947 | continue; | |||
13948 | } | |||
13949 | case ISD::CONCAT_VECTORS: { | |||
13950 | int OpBitWidth = V.getOperand(0).getValueSizeInBits(); | |||
13951 | int OpIdx = BitOffset / OpBitWidth; | |||
13952 | V = V.getOperand(OpIdx); | |||
13953 | BitOffset %= OpBitWidth; | |||
13954 | continue; | |||
13955 | } | |||
13956 | case ISD::EXTRACT_SUBVECTOR: { | |||
13957 | // The extraction index adds to the existing offset. | |||
13958 | unsigned EltBitWidth = V.getScalarValueSizeInBits(); | |||
13959 | unsigned Idx = V.getConstantOperandVal(1); | |||
13960 | unsigned BeginOffset = Idx * EltBitWidth; | |||
13961 | BitOffset += BeginOffset; | |||
13962 | V = V.getOperand(0); | |||
13963 | continue; | |||
13964 | } | |||
13965 | case ISD::INSERT_SUBVECTOR: { | |||
13966 | SDValue VOuter = V.getOperand(0), VInner = V.getOperand(1); | |||
13967 | int EltBitWidth = VOuter.getScalarValueSizeInBits(); | |||
13968 | int Idx = (int)V.getConstantOperandVal(2); | |||
13969 | int NumSubElts = (int)VInner.getSimpleValueType().getVectorNumElements(); | |||
13970 | int BeginOffset = Idx * EltBitWidth; | |||
13971 | int EndOffset = BeginOffset + NumSubElts * EltBitWidth; | |||
13972 | if (BeginOffset <= BitOffset && BitOffset < EndOffset) { | |||
13973 | BitOffset -= BeginOffset; | |||
13974 | V = VInner; | |||
13975 | } else { | |||
13976 | V = VOuter; | |||
13977 | } | |||
13978 | continue; | |||
13979 | } | |||
13980 | } | |||
13981 | break; | |||
13982 | } | |||
13983 | assert((BitOffset % NumEltBits) == 0 && "Illegal bit-offset")(static_cast <bool> ((BitOffset % NumEltBits) == 0 && "Illegal bit-offset") ? void (0) : __assert_fail ("(BitOffset % NumEltBits) == 0 && \"Illegal bit-offset\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 13983, __extension__ __PRETTY_FUNCTION__)); | |||
13984 | BroadcastIdx = BitOffset / NumEltBits; | |||
13985 | ||||
13986 | // Do we need to bitcast the source to retrieve the original broadcast index? | |||
13987 | bool BitCastSrc = V.getScalarValueSizeInBits() != NumEltBits; | |||
13988 | ||||
13989 | // Check if this is a broadcast of a scalar. We special case lowering | |||
13990 | // for scalars so that we can more effectively fold with loads. | |||
13991 | // If the original value has a larger element type than the shuffle, the | |||
13992 | // broadcast element is in essence truncated. Make that explicit to ease | |||
13993 | // folding. | |||
13994 | if (BitCastSrc && VT.isInteger()) | |||
13995 | if (SDValue TruncBroadcast = lowerShuffleAsTruncBroadcast( | |||
13996 | DL, VT, V, BroadcastIdx, Subtarget, DAG)) | |||
13997 | return TruncBroadcast; | |||
13998 | ||||
13999 | // Also check the simpler case, where we can directly reuse the scalar. | |||
14000 | if (!BitCastSrc && | |||
14001 | ((V.getOpcode() == ISD::BUILD_VECTOR && V.hasOneUse()) || | |||
14002 | (V.getOpcode() == ISD::SCALAR_TO_VECTOR && BroadcastIdx == 0))) { | |||
14003 | V = V.getOperand(BroadcastIdx); | |||
14004 | ||||
14005 | // If we can't broadcast from a register, check that the input is a load. | |||
14006 | if (!BroadcastFromReg && !isShuffleFoldableLoad(V)) | |||
14007 | return SDValue(); | |||
14008 | } else if (ISD::isNormalLoad(V.getNode()) && | |||
14009 | cast<LoadSDNode>(V)->isSimple()) { | |||
14010 | // We do not check for one-use of the vector load because a broadcast load | |||
14011 | // is expected to be a win for code size, register pressure, and possibly | |||
14012 | // uops even if the original vector load is not eliminated. | |||
14013 | ||||
14014 | // Reduce the vector load and shuffle to a broadcasted scalar load. | |||
14015 | LoadSDNode *Ld = cast<LoadSDNode>(V); | |||
14016 | SDValue BaseAddr = Ld->getOperand(1); | |||
14017 | MVT SVT = VT.getScalarType(); | |||
14018 | unsigned Offset = BroadcastIdx * SVT.getStoreSize(); | |||
14019 | assert((int)(Offset * 8) == BitOffset && "Unexpected bit-offset")(static_cast <bool> ((int)(Offset * 8) == BitOffset && "Unexpected bit-offset") ? void (0) : __assert_fail ("(int)(Offset * 8) == BitOffset && \"Unexpected bit-offset\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14019, __extension__ __PRETTY_FUNCTION__)); | |||
14020 | SDValue NewAddr = | |||
14021 | DAG.getMemBasePlusOffset(BaseAddr, TypeSize::Fixed(Offset), DL); | |||
14022 | ||||
14023 | // Directly form VBROADCAST_LOAD if we're using VBROADCAST opcode rather | |||
14024 | // than MOVDDUP. | |||
14025 | // FIXME: Should we add VBROADCAST_LOAD isel patterns for pre-AVX? | |||
14026 | if (Opcode == X86ISD::VBROADCAST) { | |||
14027 | SDVTList Tys = DAG.getVTList(VT, MVT::Other); | |||
14028 | SDValue Ops[] = {Ld->getChain(), NewAddr}; | |||
14029 | V = DAG.getMemIntrinsicNode( | |||
14030 | X86ISD::VBROADCAST_LOAD, DL, Tys, Ops, SVT, | |||
14031 | DAG.getMachineFunction().getMachineMemOperand( | |||
14032 | Ld->getMemOperand(), Offset, SVT.getStoreSize())); | |||
14033 | DAG.makeEquivalentMemoryOrdering(Ld, V); | |||
14034 | return DAG.getBitcast(VT, V); | |||
14035 | } | |||
14036 | assert(SVT == MVT::f64 && "Unexpected VT!")(static_cast <bool> (SVT == MVT::f64 && "Unexpected VT!" ) ? void (0) : __assert_fail ("SVT == MVT::f64 && \"Unexpected VT!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14036, __extension__ __PRETTY_FUNCTION__)); | |||
14037 | V = DAG.getLoad(SVT, DL, Ld->getChain(), NewAddr, | |||
14038 | DAG.getMachineFunction().getMachineMemOperand( | |||
14039 | Ld->getMemOperand(), Offset, SVT.getStoreSize())); | |||
14040 | DAG.makeEquivalentMemoryOrdering(Ld, V); | |||
14041 | } else if (!BroadcastFromReg) { | |||
14042 | // We can't broadcast from a vector register. | |||
14043 | return SDValue(); | |||
14044 | } else if (BitOffset != 0) { | |||
14045 | // We can only broadcast from the zero-element of a vector register, | |||
14046 | // but it can be advantageous to broadcast from the zero-element of a | |||
14047 | // subvector. | |||
14048 | if (!VT.is256BitVector() && !VT.is512BitVector()) | |||
14049 | return SDValue(); | |||
14050 | ||||
14051 | // VPERMQ/VPERMPD can perform the cross-lane shuffle directly. | |||
14052 | if (VT == MVT::v4f64 || VT == MVT::v4i64) | |||
14053 | return SDValue(); | |||
14054 | ||||
14055 | // Only broadcast the zero-element of a 128-bit subvector. | |||
14056 | if ((BitOffset % 128) != 0) | |||
14057 | return SDValue(); | |||
14058 | ||||
14059 | assert((BitOffset % V.getScalarValueSizeInBits()) == 0 &&(static_cast <bool> ((BitOffset % V.getScalarValueSizeInBits ()) == 0 && "Unexpected bit-offset") ? void (0) : __assert_fail ("(BitOffset % V.getScalarValueSizeInBits()) == 0 && \"Unexpected bit-offset\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14060, __extension__ __PRETTY_FUNCTION__)) | |||
14060 | "Unexpected bit-offset")(static_cast <bool> ((BitOffset % V.getScalarValueSizeInBits ()) == 0 && "Unexpected bit-offset") ? void (0) : __assert_fail ("(BitOffset % V.getScalarValueSizeInBits()) == 0 && \"Unexpected bit-offset\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14060, __extension__ __PRETTY_FUNCTION__)); | |||
14061 | assert((V.getValueSizeInBits() == 256 || V.getValueSizeInBits() == 512) &&(static_cast <bool> ((V.getValueSizeInBits() == 256 || V .getValueSizeInBits() == 512) && "Unexpected vector size" ) ? void (0) : __assert_fail ("(V.getValueSizeInBits() == 256 || V.getValueSizeInBits() == 512) && \"Unexpected vector size\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14062, __extension__ __PRETTY_FUNCTION__)) | |||
14062 | "Unexpected vector size")(static_cast <bool> ((V.getValueSizeInBits() == 256 || V .getValueSizeInBits() == 512) && "Unexpected vector size" ) ? void (0) : __assert_fail ("(V.getValueSizeInBits() == 256 || V.getValueSizeInBits() == 512) && \"Unexpected vector size\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14062, __extension__ __PRETTY_FUNCTION__)); | |||
14063 | unsigned ExtractIdx = BitOffset / V.getScalarValueSizeInBits(); | |||
14064 | V = extract128BitVector(V, ExtractIdx, DAG, DL); | |||
14065 | } | |||
14066 | ||||
14067 | // On AVX we can use VBROADCAST directly for scalar sources. | |||
14068 | if (Opcode == X86ISD::MOVDDUP && !V.getValueType().isVector()) { | |||
14069 | V = DAG.getBitcast(MVT::f64, V); | |||
14070 | if (Subtarget.hasAVX()) { | |||
14071 | V = DAG.getNode(X86ISD::VBROADCAST, DL, MVT::v2f64, V); | |||
14072 | return DAG.getBitcast(VT, V); | |||
14073 | } | |||
14074 | V = DAG.getNode(ISD::SCALAR_TO_VECTOR, DL, MVT::v2f64, V); | |||
14075 | } | |||
14076 | ||||
14077 | // If this is a scalar, do the broadcast on this type and bitcast. | |||
14078 | if (!V.getValueType().isVector()) { | |||
14079 | assert(V.getScalarValueSizeInBits() == NumEltBits &&(static_cast <bool> (V.getScalarValueSizeInBits() == NumEltBits && "Unexpected scalar size") ? void (0) : __assert_fail ("V.getScalarValueSizeInBits() == NumEltBits && \"Unexpected scalar size\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14080, __extension__ __PRETTY_FUNCTION__)) | |||
14080 | "Unexpected scalar size")(static_cast <bool> (V.getScalarValueSizeInBits() == NumEltBits && "Unexpected scalar size") ? void (0) : __assert_fail ("V.getScalarValueSizeInBits() == NumEltBits && \"Unexpected scalar size\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14080, __extension__ __PRETTY_FUNCTION__)); | |||
14081 | MVT BroadcastVT = MVT::getVectorVT(V.getSimpleValueType(), | |||
14082 | VT.getVectorNumElements()); | |||
14083 | return DAG.getBitcast(VT, DAG.getNode(Opcode, DL, BroadcastVT, V)); | |||
14084 | } | |||
14085 | ||||
14086 | // We only support broadcasting from 128-bit vectors to minimize the | |||
14087 | // number of patterns we need to deal with in isel. So extract down to | |||
14088 | // 128-bits, removing as many bitcasts as possible. | |||
14089 | if (V.getValueSizeInBits() > 128) | |||
14090 | V = extract128BitVector(peekThroughBitcasts(V), 0, DAG, DL); | |||
14091 | ||||
14092 | // Otherwise cast V to a vector with the same element type as VT, but | |||
14093 | // possibly narrower than VT. Then perform the broadcast. | |||
14094 | unsigned NumSrcElts = V.getValueSizeInBits() / NumEltBits; | |||
14095 | MVT CastVT = MVT::getVectorVT(VT.getVectorElementType(), NumSrcElts); | |||
14096 | return DAG.getNode(Opcode, DL, VT, DAG.getBitcast(CastVT, V)); | |||
14097 | } | |||
14098 | ||||
14099 | // Check for whether we can use INSERTPS to perform the shuffle. We only use | |||
14100 | // INSERTPS when the V1 elements are already in the correct locations | |||
14101 | // because otherwise we can just always use two SHUFPS instructions which | |||
14102 | // are much smaller to encode than a SHUFPS and an INSERTPS. We can also | |||
14103 | // perform INSERTPS if a single V1 element is out of place and all V2 | |||
14104 | // elements are zeroable. | |||
14105 | static bool matchShuffleAsInsertPS(SDValue &V1, SDValue &V2, | |||
14106 | unsigned &InsertPSMask, | |||
14107 | const APInt &Zeroable, | |||
14108 | ArrayRef<int> Mask, SelectionDAG &DAG) { | |||
14109 | assert(V1.getSimpleValueType().is128BitVector() && "Bad operand type!")(static_cast <bool> (V1.getSimpleValueType().is128BitVector () && "Bad operand type!") ? void (0) : __assert_fail ("V1.getSimpleValueType().is128BitVector() && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14109, __extension__ __PRETTY_FUNCTION__)); | |||
14110 | assert(V2.getSimpleValueType().is128BitVector() && "Bad operand type!")(static_cast <bool> (V2.getSimpleValueType().is128BitVector () && "Bad operand type!") ? void (0) : __assert_fail ("V2.getSimpleValueType().is128BitVector() && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14110, __extension__ __PRETTY_FUNCTION__)); | |||
14111 | assert(Mask.size() == 4 && "Unexpected mask size for v4 shuffle!")(static_cast <bool> (Mask.size() == 4 && "Unexpected mask size for v4 shuffle!" ) ? void (0) : __assert_fail ("Mask.size() == 4 && \"Unexpected mask size for v4 shuffle!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14111, __extension__ __PRETTY_FUNCTION__)); | |||
14112 | ||||
14113 | // Attempt to match INSERTPS with one element from VA or VB being | |||
14114 | // inserted into VA (or undef). If successful, V1, V2 and InsertPSMask | |||
14115 | // are updated. | |||
14116 | auto matchAsInsertPS = [&](SDValue VA, SDValue VB, | |||
14117 | ArrayRef<int> CandidateMask) { | |||
14118 | unsigned ZMask = 0; | |||
14119 | int VADstIndex = -1; | |||
14120 | int VBDstIndex = -1; | |||
14121 | bool VAUsedInPlace = false; | |||
14122 | ||||
14123 | for (int i = 0; i < 4; ++i) { | |||
14124 | // Synthesize a zero mask from the zeroable elements (includes undefs). | |||
14125 | if (Zeroable[i]) { | |||
14126 | ZMask |= 1 << i; | |||
14127 | continue; | |||
14128 | } | |||
14129 | ||||
14130 | // Flag if we use any VA inputs in place. | |||
14131 | if (i == CandidateMask[i]) { | |||
14132 | VAUsedInPlace = true; | |||
14133 | continue; | |||
14134 | } | |||
14135 | ||||
14136 | // We can only insert a single non-zeroable element. | |||
14137 | if (VADstIndex >= 0 || VBDstIndex >= 0) | |||
14138 | return false; | |||
14139 | ||||
14140 | if (CandidateMask[i] < 4) { | |||
14141 | // VA input out of place for insertion. | |||
14142 | VADstIndex = i; | |||
14143 | } else { | |||
14144 | // VB input for insertion. | |||
14145 | VBDstIndex = i; | |||
14146 | } | |||
14147 | } | |||
14148 | ||||
14149 | // Don't bother if we have no (non-zeroable) element for insertion. | |||
14150 | if (VADstIndex < 0 && VBDstIndex < 0) | |||
14151 | return false; | |||
14152 | ||||
14153 | // Determine element insertion src/dst indices. The src index is from the | |||
14154 | // start of the inserted vector, not the start of the concatenated vector. | |||
14155 | unsigned VBSrcIndex = 0; | |||
14156 | if (VADstIndex >= 0) { | |||
14157 | // If we have a VA input out of place, we use VA as the V2 element | |||
14158 | // insertion and don't use the original V2 at all. | |||
14159 | VBSrcIndex = CandidateMask[VADstIndex]; | |||
14160 | VBDstIndex = VADstIndex; | |||
14161 | VB = VA; | |||
14162 | } else { | |||
14163 | VBSrcIndex = CandidateMask[VBDstIndex] - 4; | |||
14164 | } | |||
14165 | ||||
14166 | // If no V1 inputs are used in place, then the result is created only from | |||
14167 | // the zero mask and the V2 insertion - so remove V1 dependency. | |||
14168 | if (!VAUsedInPlace) | |||
14169 | VA = DAG.getUNDEF(MVT::v4f32); | |||
14170 | ||||
14171 | // Update V1, V2 and InsertPSMask accordingly. | |||
14172 | V1 = VA; | |||
14173 | V2 = VB; | |||
14174 | ||||
14175 | // Insert the V2 element into the desired position. | |||
14176 | InsertPSMask = VBSrcIndex << 6 | VBDstIndex << 4 | ZMask; | |||
14177 | assert((InsertPSMask & ~0xFFu) == 0 && "Invalid mask!")(static_cast <bool> ((InsertPSMask & ~0xFFu) == 0 && "Invalid mask!") ? void (0) : __assert_fail ("(InsertPSMask & ~0xFFu) == 0 && \"Invalid mask!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14177, __extension__ __PRETTY_FUNCTION__)); | |||
14178 | return true; | |||
14179 | }; | |||
14180 | ||||
14181 | if (matchAsInsertPS(V1, V2, Mask)) | |||
14182 | return true; | |||
14183 | ||||
14184 | // Commute and try again. | |||
14185 | SmallVector<int, 4> CommutedMask(Mask.begin(), Mask.end()); | |||
14186 | ShuffleVectorSDNode::commuteMask(CommutedMask); | |||
14187 | if (matchAsInsertPS(V2, V1, CommutedMask)) | |||
14188 | return true; | |||
14189 | ||||
14190 | return false; | |||
14191 | } | |||
14192 | ||||
14193 | static SDValue lowerShuffleAsInsertPS(const SDLoc &DL, SDValue V1, SDValue V2, | |||
14194 | ArrayRef<int> Mask, const APInt &Zeroable, | |||
14195 | SelectionDAG &DAG) { | |||
14196 | assert(V1.getSimpleValueType() == MVT::v4f32 && "Bad operand type!")(static_cast <bool> (V1.getSimpleValueType() == MVT::v4f32 && "Bad operand type!") ? void (0) : __assert_fail ( "V1.getSimpleValueType() == MVT::v4f32 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14196, __extension__ __PRETTY_FUNCTION__)); | |||
14197 | assert(V2.getSimpleValueType() == MVT::v4f32 && "Bad operand type!")(static_cast <bool> (V2.getSimpleValueType() == MVT::v4f32 && "Bad operand type!") ? void (0) : __assert_fail ( "V2.getSimpleValueType() == MVT::v4f32 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14197, __extension__ __PRETTY_FUNCTION__)); | |||
14198 | ||||
14199 | // Attempt to match the insertps pattern. | |||
14200 | unsigned InsertPSMask = 0; | |||
14201 | if (!matchShuffleAsInsertPS(V1, V2, InsertPSMask, Zeroable, Mask, DAG)) | |||
14202 | return SDValue(); | |||
14203 | ||||
14204 | // Insert the V2 element into the desired position. | |||
14205 | return DAG.getNode(X86ISD::INSERTPS, DL, MVT::v4f32, V1, V2, | |||
14206 | DAG.getTargetConstant(InsertPSMask, DL, MVT::i8)); | |||
14207 | } | |||
14208 | ||||
14209 | /// Try to lower a shuffle as a permute of the inputs followed by an | |||
14210 | /// UNPCK instruction. | |||
14211 | /// | |||
14212 | /// This specifically targets cases where we end up with alternating between | |||
14213 | /// the two inputs, and so can permute them into something that feeds a single | |||
14214 | /// UNPCK instruction. Note that this routine only targets integer vectors | |||
14215 | /// because for floating point vectors we have a generalized SHUFPS lowering | |||
14216 | /// strategy that handles everything that doesn't *exactly* match an unpack, | |||
14217 | /// making this clever lowering unnecessary. | |||
14218 | static SDValue lowerShuffleAsPermuteAndUnpack( | |||
14219 | const SDLoc &DL, MVT VT, SDValue V1, SDValue V2, ArrayRef<int> Mask, | |||
14220 | const X86Subtarget &Subtarget, SelectionDAG &DAG) { | |||
14221 | assert(!VT.isFloatingPoint() &&(static_cast <bool> (!VT.isFloatingPoint() && "This routine only supports integer vectors." ) ? void (0) : __assert_fail ("!VT.isFloatingPoint() && \"This routine only supports integer vectors.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14222, __extension__ __PRETTY_FUNCTION__)) | |||
14222 | "This routine only supports integer vectors.")(static_cast <bool> (!VT.isFloatingPoint() && "This routine only supports integer vectors." ) ? void (0) : __assert_fail ("!VT.isFloatingPoint() && \"This routine only supports integer vectors.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14222, __extension__ __PRETTY_FUNCTION__)); | |||
14223 | assert(VT.is128BitVector() &&(static_cast <bool> (VT.is128BitVector() && "This routine only works on 128-bit vectors." ) ? void (0) : __assert_fail ("VT.is128BitVector() && \"This routine only works on 128-bit vectors.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14224, __extension__ __PRETTY_FUNCTION__)) | |||
14224 | "This routine only works on 128-bit vectors.")(static_cast <bool> (VT.is128BitVector() && "This routine only works on 128-bit vectors." ) ? void (0) : __assert_fail ("VT.is128BitVector() && \"This routine only works on 128-bit vectors.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14224, __extension__ __PRETTY_FUNCTION__)); | |||
14225 | assert(!V2.isUndef() &&(static_cast <bool> (!V2.isUndef() && "This routine should only be used when blending two inputs." ) ? void (0) : __assert_fail ("!V2.isUndef() && \"This routine should only be used when blending two inputs.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14226, __extension__ __PRETTY_FUNCTION__)) | |||
14226 | "This routine should only be used when blending two inputs.")(static_cast <bool> (!V2.isUndef() && "This routine should only be used when blending two inputs." ) ? void (0) : __assert_fail ("!V2.isUndef() && \"This routine should only be used when blending two inputs.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14226, __extension__ __PRETTY_FUNCTION__)); | |||
14227 | assert(Mask.size() >= 2 && "Single element masks are invalid.")(static_cast <bool> (Mask.size() >= 2 && "Single element masks are invalid." ) ? void (0) : __assert_fail ("Mask.size() >= 2 && \"Single element masks are invalid.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14227, __extension__ __PRETTY_FUNCTION__)); | |||
14228 | ||||
14229 | int Size = Mask.size(); | |||
14230 | ||||
14231 | int NumLoInputs = | |||
14232 | count_if(Mask, [Size](int M) { return M >= 0 && M % Size < Size / 2; }); | |||
14233 | int NumHiInputs = | |||
14234 | count_if(Mask, [Size](int M) { return M % Size >= Size / 2; }); | |||
14235 | ||||
14236 | bool UnpackLo = NumLoInputs >= NumHiInputs; | |||
14237 | ||||
14238 | auto TryUnpack = [&](int ScalarSize, int Scale) { | |||
14239 | SmallVector<int, 16> V1Mask((unsigned)Size, -1); | |||
14240 | SmallVector<int, 16> V2Mask((unsigned)Size, -1); | |||
14241 | ||||
14242 | for (int i = 0; i < Size; ++i) { | |||
14243 | if (Mask[i] < 0) | |||
14244 | continue; | |||
14245 | ||||
14246 | // Each element of the unpack contains Scale elements from this mask. | |||
14247 | int UnpackIdx = i / Scale; | |||
14248 | ||||
14249 | // We only handle the case where V1 feeds the first slots of the unpack. | |||
14250 | // We rely on canonicalization to ensure this is the case. | |||
14251 | if ((UnpackIdx % 2 == 0) != (Mask[i] < Size)) | |||
14252 | return SDValue(); | |||
14253 | ||||
14254 | // Setup the mask for this input. The indexing is tricky as we have to | |||
14255 | // handle the unpack stride. | |||
14256 | SmallVectorImpl<int> &VMask = (UnpackIdx % 2 == 0) ? V1Mask : V2Mask; | |||
14257 | VMask[(UnpackIdx / 2) * Scale + i % Scale + (UnpackLo ? 0 : Size / 2)] = | |||
14258 | Mask[i] % Size; | |||
14259 | } | |||
14260 | ||||
14261 | // If we will have to shuffle both inputs to use the unpack, check whether | |||
14262 | // we can just unpack first and shuffle the result. If so, skip this unpack. | |||
14263 | if ((NumLoInputs == 0 || NumHiInputs == 0) && !isNoopShuffleMask(V1Mask) && | |||
14264 | !isNoopShuffleMask(V2Mask)) | |||
14265 | return SDValue(); | |||
14266 | ||||
14267 | // Shuffle the inputs into place. | |||
14268 | V1 = DAG.getVectorShuffle(VT, DL, V1, DAG.getUNDEF(VT), V1Mask); | |||
14269 | V2 = DAG.getVectorShuffle(VT, DL, V2, DAG.getUNDEF(VT), V2Mask); | |||
14270 | ||||
14271 | // Cast the inputs to the type we will use to unpack them. | |||
14272 | MVT UnpackVT = MVT::getVectorVT(MVT::getIntegerVT(ScalarSize), Size / Scale); | |||
14273 | V1 = DAG.getBitcast(UnpackVT, V1); | |||
14274 | V2 = DAG.getBitcast(UnpackVT, V2); | |||
14275 | ||||
14276 | // Unpack the inputs and cast the result back to the desired type. | |||
14277 | return DAG.getBitcast( | |||
14278 | VT, DAG.getNode(UnpackLo ? X86ISD::UNPCKL : X86ISD::UNPCKH, DL, | |||
14279 | UnpackVT, V1, V2)); | |||
14280 | }; | |||
14281 | ||||
14282 | // We try each unpack from the largest to the smallest to try and find one | |||
14283 | // that fits this mask. | |||
14284 | int OrigScalarSize = VT.getScalarSizeInBits(); | |||
14285 | for (int ScalarSize = 64; ScalarSize >= OrigScalarSize; ScalarSize /= 2) | |||
14286 | if (SDValue Unpack = TryUnpack(ScalarSize, ScalarSize / OrigScalarSize)) | |||
14287 | return Unpack; | |||
14288 | ||||
14289 | // If we're shuffling with a zero vector then we're better off not doing | |||
14290 | // VECTOR_SHUFFLE(UNPCK()) as we lose track of those zero elements. | |||
14291 | if (ISD::isBuildVectorAllZeros(V1.getNode()) || | |||
14292 | ISD::isBuildVectorAllZeros(V2.getNode())) | |||
14293 | return SDValue(); | |||
14294 | ||||
14295 | // If none of the unpack-rooted lowerings worked (or were profitable) try an | |||
14296 | // initial unpack. | |||
14297 | if (NumLoInputs == 0 || NumHiInputs == 0) { | |||
14298 | assert((NumLoInputs > 0 || NumHiInputs > 0) &&(static_cast <bool> ((NumLoInputs > 0 || NumHiInputs > 0) && "We have to have *some* inputs!") ? void ( 0) : __assert_fail ("(NumLoInputs > 0 || NumHiInputs > 0) && \"We have to have *some* inputs!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14299, __extension__ __PRETTY_FUNCTION__)) | |||
14299 | "We have to have *some* inputs!")(static_cast <bool> ((NumLoInputs > 0 || NumHiInputs > 0) && "We have to have *some* inputs!") ? void ( 0) : __assert_fail ("(NumLoInputs > 0 || NumHiInputs > 0) && \"We have to have *some* inputs!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14299, __extension__ __PRETTY_FUNCTION__)); | |||
14300 | int HalfOffset = NumLoInputs == 0 ? Size / 2 : 0; | |||
14301 | ||||
14302 | // FIXME: We could consider the total complexity of the permute of each | |||
14303 | // possible unpacking. Or at the least we should consider how many | |||
14304 | // half-crossings are created. | |||
14305 | // FIXME: We could consider commuting the unpacks. | |||
14306 | ||||
14307 | SmallVector<int, 32> PermMask((unsigned)Size, -1); | |||
14308 | for (int i = 0; i < Size; ++i) { | |||
14309 | if (Mask[i] < 0) | |||
14310 | continue; | |||
14311 | ||||
14312 | assert(Mask[i] % Size >= HalfOffset && "Found input from wrong half!")(static_cast <bool> (Mask[i] % Size >= HalfOffset && "Found input from wrong half!") ? void (0) : __assert_fail ( "Mask[i] % Size >= HalfOffset && \"Found input from wrong half!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14312, __extension__ __PRETTY_FUNCTION__)); | |||
14313 | ||||
14314 | PermMask[i] = | |||
14315 | 2 * ((Mask[i] % Size) - HalfOffset) + (Mask[i] < Size ? 0 : 1); | |||
14316 | } | |||
14317 | return DAG.getVectorShuffle( | |||
14318 | VT, DL, DAG.getNode(NumLoInputs == 0 ? X86ISD::UNPCKH : X86ISD::UNPCKL, | |||
14319 | DL, VT, V1, V2), | |||
14320 | DAG.getUNDEF(VT), PermMask); | |||
14321 | } | |||
14322 | ||||
14323 | return SDValue(); | |||
14324 | } | |||
14325 | ||||
14326 | /// Handle lowering of 2-lane 64-bit floating point shuffles. | |||
14327 | /// | |||
14328 | /// This is the basis function for the 2-lane 64-bit shuffles as we have full | |||
14329 | /// support for floating point shuffles but not integer shuffles. These | |||
14330 | /// instructions will incur a domain crossing penalty on some chips though so | |||
14331 | /// it is better to avoid lowering through this for integer vectors where | |||
14332 | /// possible. | |||
14333 | static SDValue lowerV2F64Shuffle(const SDLoc &DL, ArrayRef<int> Mask, | |||
14334 | const APInt &Zeroable, SDValue V1, SDValue V2, | |||
14335 | const X86Subtarget &Subtarget, | |||
14336 | SelectionDAG &DAG) { | |||
14337 | assert(V1.getSimpleValueType() == MVT::v2f64 && "Bad operand type!")(static_cast <bool> (V1.getSimpleValueType() == MVT::v2f64 && "Bad operand type!") ? void (0) : __assert_fail ( "V1.getSimpleValueType() == MVT::v2f64 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14337, __extension__ __PRETTY_FUNCTION__)); | |||
14338 | assert(V2.getSimpleValueType() == MVT::v2f64 && "Bad operand type!")(static_cast <bool> (V2.getSimpleValueType() == MVT::v2f64 && "Bad operand type!") ? void (0) : __assert_fail ( "V2.getSimpleValueType() == MVT::v2f64 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14338, __extension__ __PRETTY_FUNCTION__)); | |||
14339 | assert(Mask.size() == 2 && "Unexpected mask size for v2 shuffle!")(static_cast <bool> (Mask.size() == 2 && "Unexpected mask size for v2 shuffle!" ) ? void (0) : __assert_fail ("Mask.size() == 2 && \"Unexpected mask size for v2 shuffle!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14339, __extension__ __PRETTY_FUNCTION__)); | |||
14340 | ||||
14341 | if (V2.isUndef()) { | |||
14342 | // Check for being able to broadcast a single element. | |||
14343 | if (SDValue Broadcast = lowerShuffleAsBroadcast(DL, MVT::v2f64, V1, V2, | |||
14344 | Mask, Subtarget, DAG)) | |||
14345 | return Broadcast; | |||
14346 | ||||
14347 | // Straight shuffle of a single input vector. Simulate this by using the | |||
14348 | // single input as both of the "inputs" to this instruction.. | |||
14349 | unsigned SHUFPDMask = (Mask[0] == 1) | ((Mask[1] == 1) << 1); | |||
14350 | ||||
14351 | if (Subtarget.hasAVX()) { | |||
14352 | // If we have AVX, we can use VPERMILPS which will allow folding a load | |||
14353 | // into the shuffle. | |||
14354 | return DAG.getNode(X86ISD::VPERMILPI, DL, MVT::v2f64, V1, | |||
14355 | DAG.getTargetConstant(SHUFPDMask, DL, MVT::i8)); | |||
14356 | } | |||
14357 | ||||
14358 | return DAG.getNode( | |||
14359 | X86ISD::SHUFP, DL, MVT::v2f64, | |||
14360 | Mask[0] == SM_SentinelUndef ? DAG.getUNDEF(MVT::v2f64) : V1, | |||
14361 | Mask[1] == SM_SentinelUndef ? DAG.getUNDEF(MVT::v2f64) : V1, | |||
14362 | DAG.getTargetConstant(SHUFPDMask, DL, MVT::i8)); | |||
14363 | } | |||
14364 | assert(Mask[0] >= 0 && "No undef lanes in multi-input v2 shuffles!")(static_cast <bool> (Mask[0] >= 0 && "No undef lanes in multi-input v2 shuffles!" ) ? void (0) : __assert_fail ("Mask[0] >= 0 && \"No undef lanes in multi-input v2 shuffles!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14364, __extension__ __PRETTY_FUNCTION__)); | |||
14365 | assert(Mask[1] >= 0 && "No undef lanes in multi-input v2 shuffles!")(static_cast <bool> (Mask[1] >= 0 && "No undef lanes in multi-input v2 shuffles!" ) ? void (0) : __assert_fail ("Mask[1] >= 0 && \"No undef lanes in multi-input v2 shuffles!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14365, __extension__ __PRETTY_FUNCTION__)); | |||
14366 | assert(Mask[0] < 2 && "We sort V1 to be the first input.")(static_cast <bool> (Mask[0] < 2 && "We sort V1 to be the first input." ) ? void (0) : __assert_fail ("Mask[0] < 2 && \"We sort V1 to be the first input.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14366, __extension__ __PRETTY_FUNCTION__)); | |||
14367 | assert(Mask[1] >= 2 && "We sort V2 to be the second input.")(static_cast <bool> (Mask[1] >= 2 && "We sort V2 to be the second input." ) ? void (0) : __assert_fail ("Mask[1] >= 2 && \"We sort V2 to be the second input.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14367, __extension__ __PRETTY_FUNCTION__)); | |||
14368 | ||||
14369 | if (Subtarget.hasAVX2()) | |||
14370 | if (SDValue Extract = lowerShuffleOfExtractsAsVperm(DL, V1, V2, Mask, DAG)) | |||
14371 | return Extract; | |||
14372 | ||||
14373 | // When loading a scalar and then shuffling it into a vector we can often do | |||
14374 | // the insertion cheaply. | |||
14375 | if (SDValue Insertion = lowerShuffleAsElementInsertion( | |||
14376 | DL, MVT::v2f64, V1, V2, Mask, Zeroable, Subtarget, DAG)) | |||
14377 | return Insertion; | |||
14378 | // Try inverting the insertion since for v2 masks it is easy to do and we | |||
14379 | // can't reliably sort the mask one way or the other. | |||
14380 | int InverseMask[2] = {Mask[0] < 0 ? -1 : (Mask[0] ^ 2), | |||
14381 | Mask[1] < 0 ? -1 : (Mask[1] ^ 2)}; | |||
14382 | if (SDValue Insertion = lowerShuffleAsElementInsertion( | |||
14383 | DL, MVT::v2f64, V2, V1, InverseMask, Zeroable, Subtarget, DAG)) | |||
14384 | return Insertion; | |||
14385 | ||||
14386 | // Try to use one of the special instruction patterns to handle two common | |||
14387 | // blend patterns if a zero-blend above didn't work. | |||
14388 | if (isShuffleEquivalent(Mask, {0, 3}, V1, V2) || | |||
14389 | isShuffleEquivalent(Mask, {1, 3}, V1, V2)) | |||
14390 | if (SDValue V1S = getScalarValueForVectorElement(V1, Mask[0], DAG)) | |||
14391 | // We can either use a special instruction to load over the low double or | |||
14392 | // to move just the low double. | |||
14393 | return DAG.getNode( | |||
14394 | X86ISD::MOVSD, DL, MVT::v2f64, V2, | |||
14395 | DAG.getNode(ISD::SCALAR_TO_VECTOR, DL, MVT::v2f64, V1S)); | |||
14396 | ||||
14397 | if (Subtarget.hasSSE41()) | |||
14398 | if (SDValue Blend = lowerShuffleAsBlend(DL, MVT::v2f64, V1, V2, Mask, | |||
14399 | Zeroable, Subtarget, DAG)) | |||
14400 | return Blend; | |||
14401 | ||||
14402 | // Use dedicated unpack instructions for masks that match their pattern. | |||
14403 | if (SDValue V = lowerShuffleWithUNPCK(DL, MVT::v2f64, Mask, V1, V2, DAG)) | |||
14404 | return V; | |||
14405 | ||||
14406 | unsigned SHUFPDMask = (Mask[0] == 1) | (((Mask[1] - 2) == 1) << 1); | |||
14407 | return DAG.getNode(X86ISD::SHUFP, DL, MVT::v2f64, V1, V2, | |||
14408 | DAG.getTargetConstant(SHUFPDMask, DL, MVT::i8)); | |||
14409 | } | |||
14410 | ||||
14411 | /// Handle lowering of 2-lane 64-bit integer shuffles. | |||
14412 | /// | |||
14413 | /// Tries to lower a 2-lane 64-bit shuffle using shuffle operations provided by | |||
14414 | /// the integer unit to minimize domain crossing penalties. However, for blends | |||
14415 | /// it falls back to the floating point shuffle operation with appropriate bit | |||
14416 | /// casting. | |||
14417 | static SDValue lowerV2I64Shuffle(const SDLoc &DL, ArrayRef<int> Mask, | |||
14418 | const APInt &Zeroable, SDValue V1, SDValue V2, | |||
14419 | const X86Subtarget &Subtarget, | |||
14420 | SelectionDAG &DAG) { | |||
14421 | assert(V1.getSimpleValueType() == MVT::v2i64 && "Bad operand type!")(static_cast <bool> (V1.getSimpleValueType() == MVT::v2i64 && "Bad operand type!") ? void (0) : __assert_fail ( "V1.getSimpleValueType() == MVT::v2i64 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14421, __extension__ __PRETTY_FUNCTION__)); | |||
14422 | assert(V2.getSimpleValueType() == MVT::v2i64 && "Bad operand type!")(static_cast <bool> (V2.getSimpleValueType() == MVT::v2i64 && "Bad operand type!") ? void (0) : __assert_fail ( "V2.getSimpleValueType() == MVT::v2i64 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14422, __extension__ __PRETTY_FUNCTION__)); | |||
14423 | assert(Mask.size() == 2 && "Unexpected mask size for v2 shuffle!")(static_cast <bool> (Mask.size() == 2 && "Unexpected mask size for v2 shuffle!" ) ? void (0) : __assert_fail ("Mask.size() == 2 && \"Unexpected mask size for v2 shuffle!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14423, __extension__ __PRETTY_FUNCTION__)); | |||
14424 | ||||
14425 | if (V2.isUndef()) { | |||
14426 | // Check for being able to broadcast a single element. | |||
14427 | if (SDValue Broadcast = lowerShuffleAsBroadcast(DL, MVT::v2i64, V1, V2, | |||
14428 | Mask, Subtarget, DAG)) | |||
14429 | return Broadcast; | |||
14430 | ||||
14431 | // Straight shuffle of a single input vector. For everything from SSE2 | |||
14432 | // onward this has a single fast instruction with no scary immediates. | |||
14433 | // We have to map the mask as it is actually a v4i32 shuffle instruction. | |||
14434 | V1 = DAG.getBitcast(MVT::v4i32, V1); | |||
14435 | int WidenedMask[4] = {Mask[0] < 0 ? -1 : (Mask[0] * 2), | |||
14436 | Mask[0] < 0 ? -1 : ((Mask[0] * 2) + 1), | |||
14437 | Mask[1] < 0 ? -1 : (Mask[1] * 2), | |||
14438 | Mask[1] < 0 ? -1 : ((Mask[1] * 2) + 1)}; | |||
14439 | return DAG.getBitcast( | |||
14440 | MVT::v2i64, | |||
14441 | DAG.getNode(X86ISD::PSHUFD, DL, MVT::v4i32, V1, | |||
14442 | getV4X86ShuffleImm8ForMask(WidenedMask, DL, DAG))); | |||
14443 | } | |||
14444 | assert(Mask[0] != -1 && "No undef lanes in multi-input v2 shuffles!")(static_cast <bool> (Mask[0] != -1 && "No undef lanes in multi-input v2 shuffles!" ) ? void (0) : __assert_fail ("Mask[0] != -1 && \"No undef lanes in multi-input v2 shuffles!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14444, __extension__ __PRETTY_FUNCTION__)); | |||
14445 | assert(Mask[1] != -1 && "No undef lanes in multi-input v2 shuffles!")(static_cast <bool> (Mask[1] != -1 && "No undef lanes in multi-input v2 shuffles!" ) ? void (0) : __assert_fail ("Mask[1] != -1 && \"No undef lanes in multi-input v2 shuffles!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14445, __extension__ __PRETTY_FUNCTION__)); | |||
14446 | assert(Mask[0] < 2 && "We sort V1 to be the first input.")(static_cast <bool> (Mask[0] < 2 && "We sort V1 to be the first input." ) ? void (0) : __assert_fail ("Mask[0] < 2 && \"We sort V1 to be the first input.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14446, __extension__ __PRETTY_FUNCTION__)); | |||
14447 | assert(Mask[1] >= 2 && "We sort V2 to be the second input.")(static_cast <bool> (Mask[1] >= 2 && "We sort V2 to be the second input." ) ? void (0) : __assert_fail ("Mask[1] >= 2 && \"We sort V2 to be the second input.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14447, __extension__ __PRETTY_FUNCTION__)); | |||
14448 | ||||
14449 | if (Subtarget.hasAVX2()) | |||
14450 | if (SDValue Extract = lowerShuffleOfExtractsAsVperm(DL, V1, V2, Mask, DAG)) | |||
14451 | return Extract; | |||
14452 | ||||
14453 | // Try to use shift instructions. | |||
14454 | if (SDValue Shift = lowerShuffleAsShift(DL, MVT::v2i64, V1, V2, Mask, | |||
14455 | Zeroable, Subtarget, DAG)) | |||
14456 | return Shift; | |||
14457 | ||||
14458 | // When loading a scalar and then shuffling it into a vector we can often do | |||
14459 | // the insertion cheaply. | |||
14460 | if (SDValue Insertion = lowerShuffleAsElementInsertion( | |||
14461 | DL, MVT::v2i64, V1, V2, Mask, Zeroable, Subtarget, DAG)) | |||
14462 | return Insertion; | |||
14463 | // Try inverting the insertion since for v2 masks it is easy to do and we | |||
14464 | // can't reliably sort the mask one way or the other. | |||
14465 | int InverseMask[2] = {Mask[0] ^ 2, Mask[1] ^ 2}; | |||
14466 | if (SDValue Insertion = lowerShuffleAsElementInsertion( | |||
14467 | DL, MVT::v2i64, V2, V1, InverseMask, Zeroable, Subtarget, DAG)) | |||
14468 | return Insertion; | |||
14469 | ||||
14470 | // We have different paths for blend lowering, but they all must use the | |||
14471 | // *exact* same predicate. | |||
14472 | bool IsBlendSupported = Subtarget.hasSSE41(); | |||
14473 | if (IsBlendSupported) | |||
14474 | if (SDValue Blend = lowerShuffleAsBlend(DL, MVT::v2i64, V1, V2, Mask, | |||
14475 | Zeroable, Subtarget, DAG)) | |||
14476 | return Blend; | |||
14477 | ||||
14478 | // Use dedicated unpack instructions for masks that match their pattern. | |||
14479 | if (SDValue V = lowerShuffleWithUNPCK(DL, MVT::v2i64, Mask, V1, V2, DAG)) | |||
14480 | return V; | |||
14481 | ||||
14482 | // Try to use byte rotation instructions. | |||
14483 | // Its more profitable for pre-SSSE3 to use shuffles/unpacks. | |||
14484 | if (Subtarget.hasSSSE3()) { | |||
14485 | if (Subtarget.hasVLX()) | |||
14486 | if (SDValue Rotate = lowerShuffleAsVALIGN(DL, MVT::v2i64, V1, V2, Mask, | |||
14487 | Subtarget, DAG)) | |||
14488 | return Rotate; | |||
14489 | ||||
14490 | if (SDValue Rotate = lowerShuffleAsByteRotate(DL, MVT::v2i64, V1, V2, Mask, | |||
14491 | Subtarget, DAG)) | |||
14492 | return Rotate; | |||
14493 | } | |||
14494 | ||||
14495 | // If we have direct support for blends, we should lower by decomposing into | |||
14496 | // a permute. That will be faster than the domain cross. | |||
14497 | if (IsBlendSupported) | |||
14498 | return lowerShuffleAsDecomposedShuffleMerge(DL, MVT::v2i64, V1, V2, Mask, | |||
14499 | Subtarget, DAG); | |||
14500 | ||||
14501 | // We implement this with SHUFPD which is pretty lame because it will likely | |||
14502 | // incur 2 cycles of stall for integer vectors on Nehalem and older chips. | |||
14503 | // However, all the alternatives are still more cycles and newer chips don't | |||
14504 | // have this problem. It would be really nice if x86 had better shuffles here. | |||
14505 | V1 = DAG.getBitcast(MVT::v2f64, V1); | |||
14506 | V2 = DAG.getBitcast(MVT::v2f64, V2); | |||
14507 | return DAG.getBitcast(MVT::v2i64, | |||
14508 | DAG.getVectorShuffle(MVT::v2f64, DL, V1, V2, Mask)); | |||
14509 | } | |||
14510 | ||||
14511 | /// Lower a vector shuffle using the SHUFPS instruction. | |||
14512 | /// | |||
14513 | /// This is a helper routine dedicated to lowering vector shuffles using SHUFPS. | |||
14514 | /// It makes no assumptions about whether this is the *best* lowering, it simply | |||
14515 | /// uses it. | |||
14516 | static SDValue lowerShuffleWithSHUFPS(const SDLoc &DL, MVT VT, | |||
14517 | ArrayRef<int> Mask, SDValue V1, | |||
14518 | SDValue V2, SelectionDAG &DAG) { | |||
14519 | SDValue LowV = V1, HighV = V2; | |||
14520 | SmallVector<int, 4> NewMask(Mask.begin(), Mask.end()); | |||
14521 | int NumV2Elements = count_if(Mask, [](int M) { return M >= 4; }); | |||
14522 | ||||
14523 | if (NumV2Elements == 1) { | |||
14524 | int V2Index = find_if(Mask, [](int M) { return M >= 4; }) - Mask.begin(); | |||
14525 | ||||
14526 | // Compute the index adjacent to V2Index and in the same half by toggling | |||
14527 | // the low bit. | |||
14528 | int V2AdjIndex = V2Index ^ 1; | |||
14529 | ||||
14530 | if (Mask[V2AdjIndex] < 0) { | |||
14531 | // Handles all the cases where we have a single V2 element and an undef. | |||
14532 | // This will only ever happen in the high lanes because we commute the | |||
14533 | // vector otherwise. | |||
14534 | if (V2Index < 2) | |||
14535 | std::swap(LowV, HighV); | |||
14536 | NewMask[V2Index] -= 4; | |||
14537 | } else { | |||
14538 | // Handle the case where the V2 element ends up adjacent to a V1 element. | |||
14539 | // To make this work, blend them together as the first step. | |||
14540 | int V1Index = V2AdjIndex; | |||
14541 | int BlendMask[4] = {Mask[V2Index] - 4, 0, Mask[V1Index], 0}; | |||
14542 | V2 = DAG.getNode(X86ISD::SHUFP, DL, VT, V2, V1, | |||
14543 | getV4X86ShuffleImm8ForMask(BlendMask, DL, DAG)); | |||
14544 | ||||
14545 | // Now proceed to reconstruct the final blend as we have the necessary | |||
14546 | // high or low half formed. | |||
14547 | if (V2Index < 2) { | |||
14548 | LowV = V2; | |||
14549 | HighV = V1; | |||
14550 | } else { | |||
14551 | HighV = V2; | |||
14552 | } | |||
14553 | NewMask[V1Index] = 2; // We put the V1 element in V2[2]. | |||
14554 | NewMask[V2Index] = 0; // We shifted the V2 element into V2[0]. | |||
14555 | } | |||
14556 | } else if (NumV2Elements == 2) { | |||
14557 | if (Mask[0] < 4 && Mask[1] < 4) { | |||
14558 | // Handle the easy case where we have V1 in the low lanes and V2 in the | |||
14559 | // high lanes. | |||
14560 | NewMask[2] -= 4; | |||
14561 | NewMask[3] -= 4; | |||
14562 | } else if (Mask[2] < 4 && Mask[3] < 4) { | |||
14563 | // We also handle the reversed case because this utility may get called | |||
14564 | // when we detect a SHUFPS pattern but can't easily commute the shuffle to | |||
14565 | // arrange things in the right direction. | |||
14566 | NewMask[0] -= 4; | |||
14567 | NewMask[1] -= 4; | |||
14568 | HighV = V1; | |||
14569 | LowV = V2; | |||
14570 | } else { | |||
14571 | // We have a mixture of V1 and V2 in both low and high lanes. Rather than | |||
14572 | // trying to place elements directly, just blend them and set up the final | |||
14573 | // shuffle to place them. | |||
14574 | ||||
14575 | // The first two blend mask elements are for V1, the second two are for | |||
14576 | // V2. | |||
14577 | int BlendMask[4] = {Mask[0] < 4 ? Mask[0] : Mask[1], | |||
14578 | Mask[2] < 4 ? Mask[2] : Mask[3], | |||
14579 | (Mask[0] >= 4 ? Mask[0] : Mask[1]) - 4, | |||
14580 | (Mask[2] >= 4 ? Mask[2] : Mask[3]) - 4}; | |||
14581 | V1 = DAG.getNode(X86ISD::SHUFP, DL, VT, V1, V2, | |||
14582 | getV4X86ShuffleImm8ForMask(BlendMask, DL, DAG)); | |||
14583 | ||||
14584 | // Now we do a normal shuffle of V1 by giving V1 as both operands to | |||
14585 | // a blend. | |||
14586 | LowV = HighV = V1; | |||
14587 | NewMask[0] = Mask[0] < 4 ? 0 : 2; | |||
14588 | NewMask[1] = Mask[0] < 4 ? 2 : 0; | |||
14589 | NewMask[2] = Mask[2] < 4 ? 1 : 3; | |||
14590 | NewMask[3] = Mask[2] < 4 ? 3 : 1; | |||
14591 | } | |||
14592 | } else if (NumV2Elements == 3) { | |||
14593 | // Ideally canonicalizeShuffleMaskWithCommute should have caught this, but | |||
14594 | // we can get here due to other paths (e.g repeated mask matching) that we | |||
14595 | // don't want to do another round of lowerVECTOR_SHUFFLE. | |||
14596 | ShuffleVectorSDNode::commuteMask(NewMask); | |||
14597 | return lowerShuffleWithSHUFPS(DL, VT, NewMask, V2, V1, DAG); | |||
14598 | } | |||
14599 | return DAG.getNode(X86ISD::SHUFP, DL, VT, LowV, HighV, | |||
14600 | getV4X86ShuffleImm8ForMask(NewMask, DL, DAG)); | |||
14601 | } | |||
14602 | ||||
14603 | /// Lower 4-lane 32-bit floating point shuffles. | |||
14604 | /// | |||
14605 | /// Uses instructions exclusively from the floating point unit to minimize | |||
14606 | /// domain crossing penalties, as these are sufficient to implement all v4f32 | |||
14607 | /// shuffles. | |||
14608 | static SDValue lowerV4F32Shuffle(const SDLoc &DL, ArrayRef<int> Mask, | |||
14609 | const APInt &Zeroable, SDValue V1, SDValue V2, | |||
14610 | const X86Subtarget &Subtarget, | |||
14611 | SelectionDAG &DAG) { | |||
14612 | assert(V1.getSimpleValueType() == MVT::v4f32 && "Bad operand type!")(static_cast <bool> (V1.getSimpleValueType() == MVT::v4f32 && "Bad operand type!") ? void (0) : __assert_fail ( "V1.getSimpleValueType() == MVT::v4f32 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14612, __extension__ __PRETTY_FUNCTION__)); | |||
14613 | assert(V2.getSimpleValueType() == MVT::v4f32 && "Bad operand type!")(static_cast <bool> (V2.getSimpleValueType() == MVT::v4f32 && "Bad operand type!") ? void (0) : __assert_fail ( "V2.getSimpleValueType() == MVT::v4f32 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14613, __extension__ __PRETTY_FUNCTION__)); | |||
14614 | assert(Mask.size() == 4 && "Unexpected mask size for v4 shuffle!")(static_cast <bool> (Mask.size() == 4 && "Unexpected mask size for v4 shuffle!" ) ? void (0) : __assert_fail ("Mask.size() == 4 && \"Unexpected mask size for v4 shuffle!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14614, __extension__ __PRETTY_FUNCTION__)); | |||
14615 | ||||
14616 | int NumV2Elements = count_if(Mask, [](int M) { return M >= 4; }); | |||
14617 | ||||
14618 | if (NumV2Elements == 0) { | |||
14619 | // Check for being able to broadcast a single element. | |||
14620 | if (SDValue Broadcast = lowerShuffleAsBroadcast(DL, MVT::v4f32, V1, V2, | |||
14621 | Mask, Subtarget, DAG)) | |||
14622 | return Broadcast; | |||
14623 | ||||
14624 | // Use even/odd duplicate instructions for masks that match their pattern. | |||
14625 | if (Subtarget.hasSSE3()) { | |||
14626 | if (isShuffleEquivalent(Mask, {0, 0, 2, 2}, V1, V2)) | |||
14627 | return DAG.getNode(X86ISD::MOVSLDUP, DL, MVT::v4f32, V1); | |||
14628 | if (isShuffleEquivalent(Mask, {1, 1, 3, 3}, V1, V2)) | |||
14629 | return DAG.getNode(X86ISD::MOVSHDUP, DL, MVT::v4f32, V1); | |||
14630 | } | |||
14631 | ||||
14632 | if (Subtarget.hasAVX()) { | |||
14633 | // If we have AVX, we can use VPERMILPS which will allow folding a load | |||
14634 | // into the shuffle. | |||
14635 | return DAG.getNode(X86ISD::VPERMILPI, DL, MVT::v4f32, V1, | |||
14636 | getV4X86ShuffleImm8ForMask(Mask, DL, DAG)); | |||
14637 | } | |||
14638 | ||||
14639 | // Use MOVLHPS/MOVHLPS to simulate unary shuffles. These are only valid | |||
14640 | // in SSE1 because otherwise they are widened to v2f64 and never get here. | |||
14641 | if (!Subtarget.hasSSE2()) { | |||
14642 | if (isShuffleEquivalent(Mask, {0, 1, 0, 1}, V1, V2)) | |||
14643 | return DAG.getNode(X86ISD::MOVLHPS, DL, MVT::v4f32, V1, V1); | |||
14644 | if (isShuffleEquivalent(Mask, {2, 3, 2, 3}, V1, V2)) | |||
14645 | return DAG.getNode(X86ISD::MOVHLPS, DL, MVT::v4f32, V1, V1); | |||
14646 | } | |||
14647 | ||||
14648 | // Otherwise, use a straight shuffle of a single input vector. We pass the | |||
14649 | // input vector to both operands to simulate this with a SHUFPS. | |||
14650 | return DAG.getNode(X86ISD::SHUFP, DL, MVT::v4f32, V1, V1, | |||
14651 | getV4X86ShuffleImm8ForMask(Mask, DL, DAG)); | |||
14652 | } | |||
14653 | ||||
14654 | if (Subtarget.hasAVX2()) | |||
14655 | if (SDValue Extract = lowerShuffleOfExtractsAsVperm(DL, V1, V2, Mask, DAG)) | |||
14656 | return Extract; | |||
14657 | ||||
14658 | // There are special ways we can lower some single-element blends. However, we | |||
14659 | // have custom ways we can lower more complex single-element blends below that | |||
14660 | // we defer to if both this and BLENDPS fail to match, so restrict this to | |||
14661 | // when the V2 input is targeting element 0 of the mask -- that is the fast | |||
14662 | // case here. | |||
14663 | if (NumV2Elements == 1 && Mask[0] >= 4) | |||
14664 | if (SDValue V = lowerShuffleAsElementInsertion( | |||
14665 | DL, MVT::v4f32, V1, V2, Mask, Zeroable, Subtarget, DAG)) | |||
14666 | return V; | |||
14667 | ||||
14668 | if (Subtarget.hasSSE41()) { | |||
14669 | if (SDValue Blend = lowerShuffleAsBlend(DL, MVT::v4f32, V1, V2, Mask, | |||
14670 | Zeroable, Subtarget, DAG)) | |||
14671 | return Blend; | |||
14672 | ||||
14673 | // Use INSERTPS if we can complete the shuffle efficiently. | |||
14674 | if (SDValue V = lowerShuffleAsInsertPS(DL, V1, V2, Mask, Zeroable, DAG)) | |||
14675 | return V; | |||
14676 | ||||
14677 | if (!isSingleSHUFPSMask(Mask)) | |||
14678 | if (SDValue BlendPerm = lowerShuffleAsBlendAndPermute(DL, MVT::v4f32, V1, | |||
14679 | V2, Mask, DAG)) | |||
14680 | return BlendPerm; | |||
14681 | } | |||
14682 | ||||
14683 | // Use low/high mov instructions. These are only valid in SSE1 because | |||
14684 | // otherwise they are widened to v2f64 and never get here. | |||
14685 | if (!Subtarget.hasSSE2()) { | |||
14686 | if (isShuffleEquivalent(Mask, {0, 1, 4, 5}, V1, V2)) | |||
14687 | return DAG.getNode(X86ISD::MOVLHPS, DL, MVT::v4f32, V1, V2); | |||
14688 | if (isShuffleEquivalent(Mask, {2, 3, 6, 7}, V1, V2)) | |||
14689 | return DAG.getNode(X86ISD::MOVHLPS, DL, MVT::v4f32, V2, V1); | |||
14690 | } | |||
14691 | ||||
14692 | // Use dedicated unpack instructions for masks that match their pattern. | |||
14693 | if (SDValue V = lowerShuffleWithUNPCK(DL, MVT::v4f32, Mask, V1, V2, DAG)) | |||
14694 | return V; | |||
14695 | ||||
14696 | // Otherwise fall back to a SHUFPS lowering strategy. | |||
14697 | return lowerShuffleWithSHUFPS(DL, MVT::v4f32, Mask, V1, V2, DAG); | |||
14698 | } | |||
14699 | ||||
14700 | /// Lower 4-lane i32 vector shuffles. | |||
14701 | /// | |||
14702 | /// We try to handle these with integer-domain shuffles where we can, but for | |||
14703 | /// blends we use the floating point domain blend instructions. | |||
14704 | static SDValue lowerV4I32Shuffle(const SDLoc &DL, ArrayRef<int> Mask, | |||
14705 | const APInt &Zeroable, SDValue V1, SDValue V2, | |||
14706 | const X86Subtarget &Subtarget, | |||
14707 | SelectionDAG &DAG) { | |||
14708 | assert(V1.getSimpleValueType() == MVT::v4i32 && "Bad operand type!")(static_cast <bool> (V1.getSimpleValueType() == MVT::v4i32 && "Bad operand type!") ? void (0) : __assert_fail ( "V1.getSimpleValueType() == MVT::v4i32 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14708, __extension__ __PRETTY_FUNCTION__)); | |||
14709 | assert(V2.getSimpleValueType() == MVT::v4i32 && "Bad operand type!")(static_cast <bool> (V2.getSimpleValueType() == MVT::v4i32 && "Bad operand type!") ? void (0) : __assert_fail ( "V2.getSimpleValueType() == MVT::v4i32 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14709, __extension__ __PRETTY_FUNCTION__)); | |||
14710 | assert(Mask.size() == 4 && "Unexpected mask size for v4 shuffle!")(static_cast <bool> (Mask.size() == 4 && "Unexpected mask size for v4 shuffle!" ) ? void (0) : __assert_fail ("Mask.size() == 4 && \"Unexpected mask size for v4 shuffle!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14710, __extension__ __PRETTY_FUNCTION__)); | |||
14711 | ||||
14712 | // Whenever we can lower this as a zext, that instruction is strictly faster | |||
14713 | // than any alternative. It also allows us to fold memory operands into the | |||
14714 | // shuffle in many cases. | |||
14715 | if (SDValue ZExt = lowerShuffleAsZeroOrAnyExtend(DL, MVT::v4i32, V1, V2, Mask, | |||
14716 | Zeroable, Subtarget, DAG)) | |||
14717 | return ZExt; | |||
14718 | ||||
14719 | int NumV2Elements = count_if(Mask, [](int M) { return M >= 4; }); | |||
14720 | ||||
14721 | if (NumV2Elements == 0) { | |||
14722 | // Try to use broadcast unless the mask only has one non-undef element. | |||
14723 | if (count_if(Mask, [](int M) { return M >= 0 && M < 4; }) > 1) { | |||
14724 | if (SDValue Broadcast = lowerShuffleAsBroadcast(DL, MVT::v4i32, V1, V2, | |||
14725 | Mask, Subtarget, DAG)) | |||
14726 | return Broadcast; | |||
14727 | } | |||
14728 | ||||
14729 | // Straight shuffle of a single input vector. For everything from SSE2 | |||
14730 | // onward this has a single fast instruction with no scary immediates. | |||
14731 | // We coerce the shuffle pattern to be compatible with UNPCK instructions | |||
14732 | // but we aren't actually going to use the UNPCK instruction because doing | |||
14733 | // so prevents folding a load into this instruction or making a copy. | |||
14734 | const int UnpackLoMask[] = {0, 0, 1, 1}; | |||
14735 | const int UnpackHiMask[] = {2, 2, 3, 3}; | |||
14736 | if (isShuffleEquivalent(Mask, {0, 0, 1, 1}, V1, V2)) | |||
14737 | Mask = UnpackLoMask; | |||
14738 | else if (isShuffleEquivalent(Mask, {2, 2, 3, 3}, V1, V2)) | |||
14739 | Mask = UnpackHiMask; | |||
14740 | ||||
14741 | return DAG.getNode(X86ISD::PSHUFD, DL, MVT::v4i32, V1, | |||
14742 | getV4X86ShuffleImm8ForMask(Mask, DL, DAG)); | |||
14743 | } | |||
14744 | ||||
14745 | if (Subtarget.hasAVX2()) | |||
14746 | if (SDValue Extract = lowerShuffleOfExtractsAsVperm(DL, V1, V2, Mask, DAG)) | |||
14747 | return Extract; | |||
14748 | ||||
14749 | // Try to use shift instructions. | |||
14750 | if (SDValue Shift = lowerShuffleAsShift(DL, MVT::v4i32, V1, V2, Mask, | |||
14751 | Zeroable, Subtarget, DAG)) | |||
14752 | return Shift; | |||
14753 | ||||
14754 | // There are special ways we can lower some single-element blends. | |||
14755 | if (NumV2Elements == 1) | |||
14756 | if (SDValue V = lowerShuffleAsElementInsertion( | |||
14757 | DL, MVT::v4i32, V1, V2, Mask, Zeroable, Subtarget, DAG)) | |||
14758 | return V; | |||
14759 | ||||
14760 | // We have different paths for blend lowering, but they all must use the | |||
14761 | // *exact* same predicate. | |||
14762 | bool IsBlendSupported = Subtarget.hasSSE41(); | |||
14763 | if (IsBlendSupported) | |||
14764 | if (SDValue Blend = lowerShuffleAsBlend(DL, MVT::v4i32, V1, V2, Mask, | |||
14765 | Zeroable, Subtarget, DAG)) | |||
14766 | return Blend; | |||
14767 | ||||
14768 | if (SDValue Masked = lowerShuffleAsBitMask(DL, MVT::v4i32, V1, V2, Mask, | |||
14769 | Zeroable, Subtarget, DAG)) | |||
14770 | return Masked; | |||
14771 | ||||
14772 | // Use dedicated unpack instructions for masks that match their pattern. | |||
14773 | if (SDValue V = lowerShuffleWithUNPCK(DL, MVT::v4i32, Mask, V1, V2, DAG)) | |||
14774 | return V; | |||
14775 | ||||
14776 | // Try to use byte rotation instructions. | |||
14777 | // Its more profitable for pre-SSSE3 to use shuffles/unpacks. | |||
14778 | if (Subtarget.hasSSSE3()) { | |||
14779 | if (Subtarget.hasVLX()) | |||
14780 | if (SDValue Rotate = lowerShuffleAsVALIGN(DL, MVT::v4i32, V1, V2, Mask, | |||
14781 | Subtarget, DAG)) | |||
14782 | return Rotate; | |||
14783 | ||||
14784 | if (SDValue Rotate = lowerShuffleAsByteRotate(DL, MVT::v4i32, V1, V2, Mask, | |||
14785 | Subtarget, DAG)) | |||
14786 | return Rotate; | |||
14787 | } | |||
14788 | ||||
14789 | // Assume that a single SHUFPS is faster than an alternative sequence of | |||
14790 | // multiple instructions (even if the CPU has a domain penalty). | |||
14791 | // If some CPU is harmed by the domain switch, we can fix it in a later pass. | |||
14792 | if (!isSingleSHUFPSMask(Mask)) { | |||
14793 | // If we have direct support for blends, we should lower by decomposing into | |||
14794 | // a permute. That will be faster than the domain cross. | |||
14795 | if (IsBlendSupported) | |||
14796 | return lowerShuffleAsDecomposedShuffleMerge(DL, MVT::v4i32, V1, V2, Mask, | |||
14797 | Subtarget, DAG); | |||
14798 | ||||
14799 | // Try to lower by permuting the inputs into an unpack instruction. | |||
14800 | if (SDValue Unpack = lowerShuffleAsPermuteAndUnpack(DL, MVT::v4i32, V1, V2, | |||
14801 | Mask, Subtarget, DAG)) | |||
14802 | return Unpack; | |||
14803 | } | |||
14804 | ||||
14805 | // We implement this with SHUFPS because it can blend from two vectors. | |||
14806 | // Because we're going to eventually use SHUFPS, we use SHUFPS even to build | |||
14807 | // up the inputs, bypassing domain shift penalties that we would incur if we | |||
14808 | // directly used PSHUFD on Nehalem and older. For newer chips, this isn't | |||
14809 | // relevant. | |||
14810 | SDValue CastV1 = DAG.getBitcast(MVT::v4f32, V1); | |||
14811 | SDValue CastV2 = DAG.getBitcast(MVT::v4f32, V2); | |||
14812 | SDValue ShufPS = DAG.getVectorShuffle(MVT::v4f32, DL, CastV1, CastV2, Mask); | |||
14813 | return DAG.getBitcast(MVT::v4i32, ShufPS); | |||
14814 | } | |||
14815 | ||||
14816 | /// Lowering of single-input v8i16 shuffles is the cornerstone of SSE2 | |||
14817 | /// shuffle lowering, and the most complex part. | |||
14818 | /// | |||
14819 | /// The lowering strategy is to try to form pairs of input lanes which are | |||
14820 | /// targeted at the same half of the final vector, and then use a dword shuffle | |||
14821 | /// to place them onto the right half, and finally unpack the paired lanes into | |||
14822 | /// their final position. | |||
14823 | /// | |||
14824 | /// The exact breakdown of how to form these dword pairs and align them on the | |||
14825 | /// correct sides is really tricky. See the comments within the function for | |||
14826 | /// more of the details. | |||
14827 | /// | |||
14828 | /// This code also handles repeated 128-bit lanes of v8i16 shuffles, but each | |||
14829 | /// lane must shuffle the *exact* same way. In fact, you must pass a v8 Mask to | |||
14830 | /// this routine for it to work correctly. To shuffle a 256-bit or 512-bit i16 | |||
14831 | /// vector, form the analogous 128-bit 8-element Mask. | |||
14832 | static SDValue lowerV8I16GeneralSingleInputShuffle( | |||
14833 | const SDLoc &DL, MVT VT, SDValue V, MutableArrayRef<int> Mask, | |||
14834 | const X86Subtarget &Subtarget, SelectionDAG &DAG) { | |||
14835 | assert(VT.getVectorElementType() == MVT::i16 && "Bad input type!")(static_cast <bool> (VT.getVectorElementType() == MVT:: i16 && "Bad input type!") ? void (0) : __assert_fail ( "VT.getVectorElementType() == MVT::i16 && \"Bad input type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14835, __extension__ __PRETTY_FUNCTION__)); | |||
14836 | MVT PSHUFDVT = MVT::getVectorVT(MVT::i32, VT.getVectorNumElements() / 2); | |||
14837 | ||||
14838 | assert(Mask.size() == 8 && "Shuffle mask length doesn't match!")(static_cast <bool> (Mask.size() == 8 && "Shuffle mask length doesn't match!" ) ? void (0) : __assert_fail ("Mask.size() == 8 && \"Shuffle mask length doesn't match!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14838, __extension__ __PRETTY_FUNCTION__)); | |||
14839 | MutableArrayRef<int> LoMask = Mask.slice(0, 4); | |||
14840 | MutableArrayRef<int> HiMask = Mask.slice(4, 4); | |||
14841 | ||||
14842 | // Attempt to directly match PSHUFLW or PSHUFHW. | |||
14843 | if (isUndefOrInRange(LoMask, 0, 4) && | |||
14844 | isSequentialOrUndefInRange(HiMask, 0, 4, 4)) { | |||
14845 | return DAG.getNode(X86ISD::PSHUFLW, DL, VT, V, | |||
14846 | getV4X86ShuffleImm8ForMask(LoMask, DL, DAG)); | |||
14847 | } | |||
14848 | if (isUndefOrInRange(HiMask, 4, 8) && | |||
14849 | isSequentialOrUndefInRange(LoMask, 0, 4, 0)) { | |||
14850 | for (int i = 0; i != 4; ++i) | |||
14851 | HiMask[i] = (HiMask[i] < 0 ? HiMask[i] : (HiMask[i] - 4)); | |||
14852 | return DAG.getNode(X86ISD::PSHUFHW, DL, VT, V, | |||
14853 | getV4X86ShuffleImm8ForMask(HiMask, DL, DAG)); | |||
14854 | } | |||
14855 | ||||
14856 | SmallVector<int, 4> LoInputs; | |||
14857 | copy_if(LoMask, std::back_inserter(LoInputs), [](int M) { return M >= 0; }); | |||
14858 | array_pod_sort(LoInputs.begin(), LoInputs.end()); | |||
14859 | LoInputs.erase(std::unique(LoInputs.begin(), LoInputs.end()), LoInputs.end()); | |||
14860 | SmallVector<int, 4> HiInputs; | |||
14861 | copy_if(HiMask, std::back_inserter(HiInputs), [](int M) { return M >= 0; }); | |||
14862 | array_pod_sort(HiInputs.begin(), HiInputs.end()); | |||
14863 | HiInputs.erase(std::unique(HiInputs.begin(), HiInputs.end()), HiInputs.end()); | |||
14864 | int NumLToL = llvm::lower_bound(LoInputs, 4) - LoInputs.begin(); | |||
14865 | int NumHToL = LoInputs.size() - NumLToL; | |||
14866 | int NumLToH = llvm::lower_bound(HiInputs, 4) - HiInputs.begin(); | |||
14867 | int NumHToH = HiInputs.size() - NumLToH; | |||
14868 | MutableArrayRef<int> LToLInputs(LoInputs.data(), NumLToL); | |||
14869 | MutableArrayRef<int> LToHInputs(HiInputs.data(), NumLToH); | |||
14870 | MutableArrayRef<int> HToLInputs(LoInputs.data() + NumLToL, NumHToL); | |||
14871 | MutableArrayRef<int> HToHInputs(HiInputs.data() + NumLToH, NumHToH); | |||
14872 | ||||
14873 | // If we are shuffling values from one half - check how many different DWORD | |||
14874 | // pairs we need to create. If only 1 or 2 then we can perform this as a | |||
14875 | // PSHUFLW/PSHUFHW + PSHUFD instead of the PSHUFD+PSHUFLW+PSHUFHW chain below. | |||
14876 | auto ShuffleDWordPairs = [&](ArrayRef<int> PSHUFHalfMask, | |||
14877 | ArrayRef<int> PSHUFDMask, unsigned ShufWOp) { | |||
14878 | V = DAG.getNode(ShufWOp, DL, VT, V, | |||
14879 | getV4X86ShuffleImm8ForMask(PSHUFHalfMask, DL, DAG)); | |||
14880 | V = DAG.getBitcast(PSHUFDVT, V); | |||
14881 | V = DAG.getNode(X86ISD::PSHUFD, DL, PSHUFDVT, V, | |||
14882 | getV4X86ShuffleImm8ForMask(PSHUFDMask, DL, DAG)); | |||
14883 | return DAG.getBitcast(VT, V); | |||
14884 | }; | |||
14885 | ||||
14886 | if ((NumHToL + NumHToH) == 0 || (NumLToL + NumLToH) == 0) { | |||
14887 | int PSHUFDMask[4] = { -1, -1, -1, -1 }; | |||
14888 | SmallVector<std::pair<int, int>, 4> DWordPairs; | |||
14889 | int DOffset = ((NumHToL + NumHToH) == 0 ? 0 : 2); | |||
14890 | ||||
14891 | // Collect the different DWORD pairs. | |||
14892 | for (int DWord = 0; DWord != 4; ++DWord) { | |||
14893 | int M0 = Mask[2 * DWord + 0]; | |||
14894 | int M1 = Mask[2 * DWord + 1]; | |||
14895 | M0 = (M0 >= 0 ? M0 % 4 : M0); | |||
14896 | M1 = (M1 >= 0 ? M1 % 4 : M1); | |||
14897 | if (M0 < 0 && M1 < 0) | |||
14898 | continue; | |||
14899 | ||||
14900 | bool Match = false; | |||
14901 | for (int j = 0, e = DWordPairs.size(); j < e; ++j) { | |||
14902 | auto &DWordPair = DWordPairs[j]; | |||
14903 | if ((M0 < 0 || isUndefOrEqual(DWordPair.first, M0)) && | |||
14904 | (M1 < 0 || isUndefOrEqual(DWordPair.second, M1))) { | |||
14905 | DWordPair.first = (M0 >= 0 ? M0 : DWordPair.first); | |||
14906 | DWordPair.second = (M1 >= 0 ? M1 : DWordPair.second); | |||
14907 | PSHUFDMask[DWord] = DOffset + j; | |||
14908 | Match = true; | |||
14909 | break; | |||
14910 | } | |||
14911 | } | |||
14912 | if (!Match) { | |||
14913 | PSHUFDMask[DWord] = DOffset + DWordPairs.size(); | |||
14914 | DWordPairs.push_back(std::make_pair(M0, M1)); | |||
14915 | } | |||
14916 | } | |||
14917 | ||||
14918 | if (DWordPairs.size() <= 2) { | |||
14919 | DWordPairs.resize(2, std::make_pair(-1, -1)); | |||
14920 | int PSHUFHalfMask[4] = {DWordPairs[0].first, DWordPairs[0].second, | |||
14921 | DWordPairs[1].first, DWordPairs[1].second}; | |||
14922 | if ((NumHToL + NumHToH) == 0) | |||
14923 | return ShuffleDWordPairs(PSHUFHalfMask, PSHUFDMask, X86ISD::PSHUFLW); | |||
14924 | if ((NumLToL + NumLToH) == 0) | |||
14925 | return ShuffleDWordPairs(PSHUFHalfMask, PSHUFDMask, X86ISD::PSHUFHW); | |||
14926 | } | |||
14927 | } | |||
14928 | ||||
14929 | // Simplify the 1-into-3 and 3-into-1 cases with a single pshufd. For all | |||
14930 | // such inputs we can swap two of the dwords across the half mark and end up | |||
14931 | // with <=2 inputs to each half in each half. Once there, we can fall through | |||
14932 | // to the generic code below. For example: | |||
14933 | // | |||
14934 | // Input: [a, b, c, d, e, f, g, h] -PSHUFD[0,2,1,3]-> [a, b, e, f, c, d, g, h] | |||
14935 | // Mask: [0, 1, 2, 7, 4, 5, 6, 3] -----------------> [0, 1, 4, 7, 2, 3, 6, 5] | |||
14936 | // | |||
14937 | // However in some very rare cases we have a 1-into-3 or 3-into-1 on one half | |||
14938 | // and an existing 2-into-2 on the other half. In this case we may have to | |||
14939 | // pre-shuffle the 2-into-2 half to avoid turning it into a 3-into-1 or | |||
14940 | // 1-into-3 which could cause us to cycle endlessly fixing each side in turn. | |||
14941 | // Fortunately, we don't have to handle anything but a 2-into-2 pattern | |||
14942 | // because any other situation (including a 3-into-1 or 1-into-3 in the other | |||
14943 | // half than the one we target for fixing) will be fixed when we re-enter this | |||
14944 | // path. We will also combine away any sequence of PSHUFD instructions that | |||
14945 | // result into a single instruction. Here is an example of the tricky case: | |||
14946 | // | |||
14947 | // Input: [a, b, c, d, e, f, g, h] -PSHUFD[0,2,1,3]-> [a, b, e, f, c, d, g, h] | |||
14948 | // Mask: [3, 7, 1, 0, 2, 7, 3, 5] -THIS-IS-BAD!!!!-> [5, 7, 1, 0, 4, 7, 5, 3] | |||
14949 | // | |||
14950 | // This now has a 1-into-3 in the high half! Instead, we do two shuffles: | |||
14951 | // | |||
14952 | // Input: [a, b, c, d, e, f, g, h] PSHUFHW[0,2,1,3]-> [a, b, c, d, e, g, f, h] | |||
14953 | // Mask: [3, 7, 1, 0, 2, 7, 3, 5] -----------------> [3, 7, 1, 0, 2, 7, 3, 6] | |||
14954 | // | |||
14955 | // Input: [a, b, c, d, e, g, f, h] -PSHUFD[0,2,1,3]-> [a, b, e, g, c, d, f, h] | |||
14956 | // Mask: [3, 7, 1, 0, 2, 7, 3, 6] -----------------> [5, 7, 1, 0, 4, 7, 5, 6] | |||
14957 | // | |||
14958 | // The result is fine to be handled by the generic logic. | |||
14959 | auto balanceSides = [&](ArrayRef<int> AToAInputs, ArrayRef<int> BToAInputs, | |||
14960 | ArrayRef<int> BToBInputs, ArrayRef<int> AToBInputs, | |||
14961 | int AOffset, int BOffset) { | |||
14962 | assert((AToAInputs.size() == 3 || AToAInputs.size() == 1) &&(static_cast <bool> ((AToAInputs.size() == 3 || AToAInputs .size() == 1) && "Must call this with A having 3 or 1 inputs from the A half." ) ? void (0) : __assert_fail ("(AToAInputs.size() == 3 || AToAInputs.size() == 1) && \"Must call this with A having 3 or 1 inputs from the A half.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14963, __extension__ __PRETTY_FUNCTION__)) | |||
14963 | "Must call this with A having 3 or 1 inputs from the A half.")(static_cast <bool> ((AToAInputs.size() == 3 || AToAInputs .size() == 1) && "Must call this with A having 3 or 1 inputs from the A half." ) ? void (0) : __assert_fail ("(AToAInputs.size() == 3 || AToAInputs.size() == 1) && \"Must call this with A having 3 or 1 inputs from the A half.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14963, __extension__ __PRETTY_FUNCTION__)); | |||
14964 | assert((BToAInputs.size() == 1 || BToAInputs.size() == 3) &&(static_cast <bool> ((BToAInputs.size() == 1 || BToAInputs .size() == 3) && "Must call this with B having 1 or 3 inputs from the B half." ) ? void (0) : __assert_fail ("(BToAInputs.size() == 1 || BToAInputs.size() == 3) && \"Must call this with B having 1 or 3 inputs from the B half.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14965, __extension__ __PRETTY_FUNCTION__)) | |||
14965 | "Must call this with B having 1 or 3 inputs from the B half.")(static_cast <bool> ((BToAInputs.size() == 1 || BToAInputs .size() == 3) && "Must call this with B having 1 or 3 inputs from the B half." ) ? void (0) : __assert_fail ("(BToAInputs.size() == 1 || BToAInputs.size() == 3) && \"Must call this with B having 1 or 3 inputs from the B half.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14965, __extension__ __PRETTY_FUNCTION__)); | |||
14966 | assert(AToAInputs.size() + BToAInputs.size() == 4 &&(static_cast <bool> (AToAInputs.size() + BToAInputs.size () == 4 && "Must call this with either 3:1 or 1:3 inputs (summing to 4)." ) ? void (0) : __assert_fail ("AToAInputs.size() + BToAInputs.size() == 4 && \"Must call this with either 3:1 or 1:3 inputs (summing to 4).\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14967, __extension__ __PRETTY_FUNCTION__)) | |||
14967 | "Must call this with either 3:1 or 1:3 inputs (summing to 4).")(static_cast <bool> (AToAInputs.size() + BToAInputs.size () == 4 && "Must call this with either 3:1 or 1:3 inputs (summing to 4)." ) ? void (0) : __assert_fail ("AToAInputs.size() + BToAInputs.size() == 4 && \"Must call this with either 3:1 or 1:3 inputs (summing to 4).\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 14967, __extension__ __PRETTY_FUNCTION__)); | |||
14968 | ||||
14969 | bool ThreeAInputs = AToAInputs.size() == 3; | |||
14970 | ||||
14971 | // Compute the index of dword with only one word among the three inputs in | |||
14972 | // a half by taking the sum of the half with three inputs and subtracting | |||
14973 | // the sum of the actual three inputs. The difference is the remaining | |||
14974 | // slot. | |||
14975 | int ADWord = 0, BDWord = 0; | |||
14976 | int &TripleDWord = ThreeAInputs ? ADWord : BDWord; | |||
14977 | int &OneInputDWord = ThreeAInputs ? BDWord : ADWord; | |||
14978 | int TripleInputOffset = ThreeAInputs ? AOffset : BOffset; | |||
14979 | ArrayRef<int> TripleInputs = ThreeAInputs ? AToAInputs : BToAInputs; | |||
14980 | int OneInput = ThreeAInputs ? BToAInputs[0] : AToAInputs[0]; | |||
14981 | int TripleInputSum = 0 + 1 + 2 + 3 + (4 * TripleInputOffset); | |||
14982 | int TripleNonInputIdx = | |||
14983 | TripleInputSum - std::accumulate(TripleInputs.begin(), TripleInputs.end(), 0); | |||
14984 | TripleDWord = TripleNonInputIdx / 2; | |||
14985 | ||||
14986 | // We use xor with one to compute the adjacent DWord to whichever one the | |||
14987 | // OneInput is in. | |||
14988 | OneInputDWord = (OneInput / 2) ^ 1; | |||
14989 | ||||
14990 | // Check for one tricky case: We're fixing a 3<-1 or a 1<-3 shuffle for AToA | |||
14991 | // and BToA inputs. If there is also such a problem with the BToB and AToB | |||
14992 | // inputs, we don't try to fix it necessarily -- we'll recurse and see it in | |||
14993 | // the next pass. However, if we have a 2<-2 in the BToB and AToB inputs, it | |||
14994 | // is essential that we don't *create* a 3<-1 as then we might oscillate. | |||
14995 | if (BToBInputs.size() == 2 && AToBInputs.size() == 2) { | |||
14996 | // Compute how many inputs will be flipped by swapping these DWords. We | |||
14997 | // need | |||
14998 | // to balance this to ensure we don't form a 3-1 shuffle in the other | |||
14999 | // half. | |||
15000 | int NumFlippedAToBInputs = | |||
15001 | std::count(AToBInputs.begin(), AToBInputs.end(), 2 * ADWord) + | |||
15002 | std::count(AToBInputs.begin(), AToBInputs.end(), 2 * ADWord + 1); | |||
15003 | int NumFlippedBToBInputs = | |||
15004 | std::count(BToBInputs.begin(), BToBInputs.end(), 2 * BDWord) + | |||
15005 | std::count(BToBInputs.begin(), BToBInputs.end(), 2 * BDWord + 1); | |||
15006 | if ((NumFlippedAToBInputs == 1 && | |||
15007 | (NumFlippedBToBInputs == 0 || NumFlippedBToBInputs == 2)) || | |||
15008 | (NumFlippedBToBInputs == 1 && | |||
15009 | (NumFlippedAToBInputs == 0 || NumFlippedAToBInputs == 2))) { | |||
15010 | // We choose whether to fix the A half or B half based on whether that | |||
15011 | // half has zero flipped inputs. At zero, we may not be able to fix it | |||
15012 | // with that half. We also bias towards fixing the B half because that | |||
15013 | // will more commonly be the high half, and we have to bias one way. | |||
15014 | auto FixFlippedInputs = [&V, &DL, &Mask, &DAG](int PinnedIdx, int DWord, | |||
15015 | ArrayRef<int> Inputs) { | |||
15016 | int FixIdx = PinnedIdx ^ 1; // The adjacent slot to the pinned slot. | |||
15017 | bool IsFixIdxInput = is_contained(Inputs, PinnedIdx ^ 1); | |||
15018 | // Determine whether the free index is in the flipped dword or the | |||
15019 | // unflipped dword based on where the pinned index is. We use this bit | |||
15020 | // in an xor to conditionally select the adjacent dword. | |||
15021 | int FixFreeIdx = 2 * (DWord ^ (PinnedIdx / 2 == DWord)); | |||
15022 | bool IsFixFreeIdxInput = is_contained(Inputs, FixFreeIdx); | |||
15023 | if (IsFixIdxInput == IsFixFreeIdxInput) | |||
15024 | FixFreeIdx += 1; | |||
15025 | IsFixFreeIdxInput = is_contained(Inputs, FixFreeIdx); | |||
15026 | assert(IsFixIdxInput != IsFixFreeIdxInput &&(static_cast <bool> (IsFixIdxInput != IsFixFreeIdxInput && "We need to be changing the number of flipped inputs!" ) ? void (0) : __assert_fail ("IsFixIdxInput != IsFixFreeIdxInput && \"We need to be changing the number of flipped inputs!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15027, __extension__ __PRETTY_FUNCTION__)) | |||
15027 | "We need to be changing the number of flipped inputs!")(static_cast <bool> (IsFixIdxInput != IsFixFreeIdxInput && "We need to be changing the number of flipped inputs!" ) ? void (0) : __assert_fail ("IsFixIdxInput != IsFixFreeIdxInput && \"We need to be changing the number of flipped inputs!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15027, __extension__ __PRETTY_FUNCTION__)); | |||
15028 | int PSHUFHalfMask[] = {0, 1, 2, 3}; | |||
15029 | std::swap(PSHUFHalfMask[FixFreeIdx % 4], PSHUFHalfMask[FixIdx % 4]); | |||
15030 | V = DAG.getNode( | |||
15031 | FixIdx < 4 ? X86ISD::PSHUFLW : X86ISD::PSHUFHW, DL, | |||
15032 | MVT::getVectorVT(MVT::i16, V.getValueSizeInBits() / 16), V, | |||
15033 | getV4X86ShuffleImm8ForMask(PSHUFHalfMask, DL, DAG)); | |||
15034 | ||||
15035 | for (int &M : Mask) | |||
15036 | if (M >= 0 && M == FixIdx) | |||
15037 | M = FixFreeIdx; | |||
15038 | else if (M >= 0 && M == FixFreeIdx) | |||
15039 | M = FixIdx; | |||
15040 | }; | |||
15041 | if (NumFlippedBToBInputs != 0) { | |||
15042 | int BPinnedIdx = | |||
15043 | BToAInputs.size() == 3 ? TripleNonInputIdx : OneInput; | |||
15044 | FixFlippedInputs(BPinnedIdx, BDWord, BToBInputs); | |||
15045 | } else { | |||
15046 | assert(NumFlippedAToBInputs != 0 && "Impossible given predicates!")(static_cast <bool> (NumFlippedAToBInputs != 0 && "Impossible given predicates!") ? void (0) : __assert_fail ( "NumFlippedAToBInputs != 0 && \"Impossible given predicates!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15046, __extension__ __PRETTY_FUNCTION__)); | |||
15047 | int APinnedIdx = ThreeAInputs ? TripleNonInputIdx : OneInput; | |||
15048 | FixFlippedInputs(APinnedIdx, ADWord, AToBInputs); | |||
15049 | } | |||
15050 | } | |||
15051 | } | |||
15052 | ||||
15053 | int PSHUFDMask[] = {0, 1, 2, 3}; | |||
15054 | PSHUFDMask[ADWord] = BDWord; | |||
15055 | PSHUFDMask[BDWord] = ADWord; | |||
15056 | V = DAG.getBitcast( | |||
15057 | VT, | |||
15058 | DAG.getNode(X86ISD::PSHUFD, DL, PSHUFDVT, DAG.getBitcast(PSHUFDVT, V), | |||
15059 | getV4X86ShuffleImm8ForMask(PSHUFDMask, DL, DAG))); | |||
15060 | ||||
15061 | // Adjust the mask to match the new locations of A and B. | |||
15062 | for (int &M : Mask) | |||
15063 | if (M >= 0 && M/2 == ADWord) | |||
15064 | M = 2 * BDWord + M % 2; | |||
15065 | else if (M >= 0 && M/2 == BDWord) | |||
15066 | M = 2 * ADWord + M % 2; | |||
15067 | ||||
15068 | // Recurse back into this routine to re-compute state now that this isn't | |||
15069 | // a 3 and 1 problem. | |||
15070 | return lowerV8I16GeneralSingleInputShuffle(DL, VT, V, Mask, Subtarget, DAG); | |||
15071 | }; | |||
15072 | if ((NumLToL == 3 && NumHToL == 1) || (NumLToL == 1 && NumHToL == 3)) | |||
15073 | return balanceSides(LToLInputs, HToLInputs, HToHInputs, LToHInputs, 0, 4); | |||
15074 | if ((NumHToH == 3 && NumLToH == 1) || (NumHToH == 1 && NumLToH == 3)) | |||
15075 | return balanceSides(HToHInputs, LToHInputs, LToLInputs, HToLInputs, 4, 0); | |||
15076 | ||||
15077 | // At this point there are at most two inputs to the low and high halves from | |||
15078 | // each half. That means the inputs can always be grouped into dwords and | |||
15079 | // those dwords can then be moved to the correct half with a dword shuffle. | |||
15080 | // We use at most one low and one high word shuffle to collect these paired | |||
15081 | // inputs into dwords, and finally a dword shuffle to place them. | |||
15082 | int PSHUFLMask[4] = {-1, -1, -1, -1}; | |||
15083 | int PSHUFHMask[4] = {-1, -1, -1, -1}; | |||
15084 | int PSHUFDMask[4] = {-1, -1, -1, -1}; | |||
15085 | ||||
15086 | // First fix the masks for all the inputs that are staying in their | |||
15087 | // original halves. This will then dictate the targets of the cross-half | |||
15088 | // shuffles. | |||
15089 | auto fixInPlaceInputs = | |||
15090 | [&PSHUFDMask](ArrayRef<int> InPlaceInputs, ArrayRef<int> IncomingInputs, | |||
15091 | MutableArrayRef<int> SourceHalfMask, | |||
15092 | MutableArrayRef<int> HalfMask, int HalfOffset) { | |||
15093 | if (InPlaceInputs.empty()) | |||
15094 | return; | |||
15095 | if (InPlaceInputs.size() == 1) { | |||
15096 | SourceHalfMask[InPlaceInputs[0] - HalfOffset] = | |||
15097 | InPlaceInputs[0] - HalfOffset; | |||
15098 | PSHUFDMask[InPlaceInputs[0] / 2] = InPlaceInputs[0] / 2; | |||
15099 | return; | |||
15100 | } | |||
15101 | if (IncomingInputs.empty()) { | |||
15102 | // Just fix all of the in place inputs. | |||
15103 | for (int Input : InPlaceInputs) { | |||
15104 | SourceHalfMask[Input - HalfOffset] = Input - HalfOffset; | |||
15105 | PSHUFDMask[Input / 2] = Input / 2; | |||
15106 | } | |||
15107 | return; | |||
15108 | } | |||
15109 | ||||
15110 | assert(InPlaceInputs.size() == 2 && "Cannot handle 3 or 4 inputs!")(static_cast <bool> (InPlaceInputs.size() == 2 && "Cannot handle 3 or 4 inputs!") ? void (0) : __assert_fail ( "InPlaceInputs.size() == 2 && \"Cannot handle 3 or 4 inputs!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15110, __extension__ __PRETTY_FUNCTION__)); | |||
15111 | SourceHalfMask[InPlaceInputs[0] - HalfOffset] = | |||
15112 | InPlaceInputs[0] - HalfOffset; | |||
15113 | // Put the second input next to the first so that they are packed into | |||
15114 | // a dword. We find the adjacent index by toggling the low bit. | |||
15115 | int AdjIndex = InPlaceInputs[0] ^ 1; | |||
15116 | SourceHalfMask[AdjIndex - HalfOffset] = InPlaceInputs[1] - HalfOffset; | |||
15117 | std::replace(HalfMask.begin(), HalfMask.end(), InPlaceInputs[1], AdjIndex); | |||
15118 | PSHUFDMask[AdjIndex / 2] = AdjIndex / 2; | |||
15119 | }; | |||
15120 | fixInPlaceInputs(LToLInputs, HToLInputs, PSHUFLMask, LoMask, 0); | |||
15121 | fixInPlaceInputs(HToHInputs, LToHInputs, PSHUFHMask, HiMask, 4); | |||
15122 | ||||
15123 | // Now gather the cross-half inputs and place them into a free dword of | |||
15124 | // their target half. | |||
15125 | // FIXME: This operation could almost certainly be simplified dramatically to | |||
15126 | // look more like the 3-1 fixing operation. | |||
15127 | auto moveInputsToRightHalf = [&PSHUFDMask]( | |||
15128 | MutableArrayRef<int> IncomingInputs, ArrayRef<int> ExistingInputs, | |||
15129 | MutableArrayRef<int> SourceHalfMask, MutableArrayRef<int> HalfMask, | |||
15130 | MutableArrayRef<int> FinalSourceHalfMask, int SourceOffset, | |||
15131 | int DestOffset) { | |||
15132 | auto isWordClobbered = [](ArrayRef<int> SourceHalfMask, int Word) { | |||
15133 | return SourceHalfMask[Word] >= 0 && SourceHalfMask[Word] != Word; | |||
15134 | }; | |||
15135 | auto isDWordClobbered = [&isWordClobbered](ArrayRef<int> SourceHalfMask, | |||
15136 | int Word) { | |||
15137 | int LowWord = Word & ~1; | |||
15138 | int HighWord = Word | 1; | |||
15139 | return isWordClobbered(SourceHalfMask, LowWord) || | |||
15140 | isWordClobbered(SourceHalfMask, HighWord); | |||
15141 | }; | |||
15142 | ||||
15143 | if (IncomingInputs.empty()) | |||
15144 | return; | |||
15145 | ||||
15146 | if (ExistingInputs.empty()) { | |||
15147 | // Map any dwords with inputs from them into the right half. | |||
15148 | for (int Input : IncomingInputs) { | |||
15149 | // If the source half mask maps over the inputs, turn those into | |||
15150 | // swaps and use the swapped lane. | |||
15151 | if (isWordClobbered(SourceHalfMask, Input - SourceOffset)) { | |||
15152 | if (SourceHalfMask[SourceHalfMask[Input - SourceOffset]] < 0) { | |||
15153 | SourceHalfMask[SourceHalfMask[Input - SourceOffset]] = | |||
15154 | Input - SourceOffset; | |||
15155 | // We have to swap the uses in our half mask in one sweep. | |||
15156 | for (int &M : HalfMask) | |||
15157 | if (M == SourceHalfMask[Input - SourceOffset] + SourceOffset) | |||
15158 | M = Input; | |||
15159 | else if (M == Input) | |||
15160 | M = SourceHalfMask[Input - SourceOffset] + SourceOffset; | |||
15161 | } else { | |||
15162 | assert(SourceHalfMask[SourceHalfMask[Input - SourceOffset]] ==(static_cast <bool> (SourceHalfMask[SourceHalfMask[Input - SourceOffset]] == Input - SourceOffset && "Previous placement doesn't match!" ) ? void (0) : __assert_fail ("SourceHalfMask[SourceHalfMask[Input - SourceOffset]] == Input - SourceOffset && \"Previous placement doesn't match!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15164, __extension__ __PRETTY_FUNCTION__)) | |||
15163 | Input - SourceOffset &&(static_cast <bool> (SourceHalfMask[SourceHalfMask[Input - SourceOffset]] == Input - SourceOffset && "Previous placement doesn't match!" ) ? void (0) : __assert_fail ("SourceHalfMask[SourceHalfMask[Input - SourceOffset]] == Input - SourceOffset && \"Previous placement doesn't match!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15164, __extension__ __PRETTY_FUNCTION__)) | |||
15164 | "Previous placement doesn't match!")(static_cast <bool> (SourceHalfMask[SourceHalfMask[Input - SourceOffset]] == Input - SourceOffset && "Previous placement doesn't match!" ) ? void (0) : __assert_fail ("SourceHalfMask[SourceHalfMask[Input - SourceOffset]] == Input - SourceOffset && \"Previous placement doesn't match!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15164, __extension__ __PRETTY_FUNCTION__)); | |||
15165 | } | |||
15166 | // Note that this correctly re-maps both when we do a swap and when | |||
15167 | // we observe the other side of the swap above. We rely on that to | |||
15168 | // avoid swapping the members of the input list directly. | |||
15169 | Input = SourceHalfMask[Input - SourceOffset] + SourceOffset; | |||
15170 | } | |||
15171 | ||||
15172 | // Map the input's dword into the correct half. | |||
15173 | if (PSHUFDMask[(Input - SourceOffset + DestOffset) / 2] < 0) | |||
15174 | PSHUFDMask[(Input - SourceOffset + DestOffset) / 2] = Input / 2; | |||
15175 | else | |||
15176 | assert(PSHUFDMask[(Input - SourceOffset + DestOffset) / 2] ==(static_cast <bool> (PSHUFDMask[(Input - SourceOffset + DestOffset) / 2] == Input / 2 && "Previous placement doesn't match!" ) ? void (0) : __assert_fail ("PSHUFDMask[(Input - SourceOffset + DestOffset) / 2] == Input / 2 && \"Previous placement doesn't match!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15178, __extension__ __PRETTY_FUNCTION__)) | |||
15177 | Input / 2 &&(static_cast <bool> (PSHUFDMask[(Input - SourceOffset + DestOffset) / 2] == Input / 2 && "Previous placement doesn't match!" ) ? void (0) : __assert_fail ("PSHUFDMask[(Input - SourceOffset + DestOffset) / 2] == Input / 2 && \"Previous placement doesn't match!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15178, __extension__ __PRETTY_FUNCTION__)) | |||
15178 | "Previous placement doesn't match!")(static_cast <bool> (PSHUFDMask[(Input - SourceOffset + DestOffset) / 2] == Input / 2 && "Previous placement doesn't match!" ) ? void (0) : __assert_fail ("PSHUFDMask[(Input - SourceOffset + DestOffset) / 2] == Input / 2 && \"Previous placement doesn't match!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15178, __extension__ __PRETTY_FUNCTION__)); | |||
15179 | } | |||
15180 | ||||
15181 | // And just directly shift any other-half mask elements to be same-half | |||
15182 | // as we will have mirrored the dword containing the element into the | |||
15183 | // same position within that half. | |||
15184 | for (int &M : HalfMask) | |||
15185 | if (M >= SourceOffset && M < SourceOffset + 4) { | |||
15186 | M = M - SourceOffset + DestOffset; | |||
15187 | assert(M >= 0 && "This should never wrap below zero!")(static_cast <bool> (M >= 0 && "This should never wrap below zero!" ) ? void (0) : __assert_fail ("M >= 0 && \"This should never wrap below zero!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15187, __extension__ __PRETTY_FUNCTION__)); | |||
15188 | } | |||
15189 | return; | |||
15190 | } | |||
15191 | ||||
15192 | // Ensure we have the input in a viable dword of its current half. This | |||
15193 | // is particularly tricky because the original position may be clobbered | |||
15194 | // by inputs being moved and *staying* in that half. | |||
15195 | if (IncomingInputs.size() == 1) { | |||
15196 | if (isWordClobbered(SourceHalfMask, IncomingInputs[0] - SourceOffset)) { | |||
15197 | int InputFixed = find(SourceHalfMask, -1) - std::begin(SourceHalfMask) + | |||
15198 | SourceOffset; | |||
15199 | SourceHalfMask[InputFixed - SourceOffset] = | |||
15200 | IncomingInputs[0] - SourceOffset; | |||
15201 | std::replace(HalfMask.begin(), HalfMask.end(), IncomingInputs[0], | |||
15202 | InputFixed); | |||
15203 | IncomingInputs[0] = InputFixed; | |||
15204 | } | |||
15205 | } else if (IncomingInputs.size() == 2) { | |||
15206 | if (IncomingInputs[0] / 2 != IncomingInputs[1] / 2 || | |||
15207 | isDWordClobbered(SourceHalfMask, IncomingInputs[0] - SourceOffset)) { | |||
15208 | // We have two non-adjacent or clobbered inputs we need to extract from | |||
15209 | // the source half. To do this, we need to map them into some adjacent | |||
15210 | // dword slot in the source mask. | |||
15211 | int InputsFixed[2] = {IncomingInputs[0] - SourceOffset, | |||
15212 | IncomingInputs[1] - SourceOffset}; | |||
15213 | ||||
15214 | // If there is a free slot in the source half mask adjacent to one of | |||
15215 | // the inputs, place the other input in it. We use (Index XOR 1) to | |||
15216 | // compute an adjacent index. | |||
15217 | if (!isWordClobbered(SourceHalfMask, InputsFixed[0]) && | |||
15218 | SourceHalfMask[InputsFixed[0] ^ 1] < 0) { | |||
15219 | SourceHalfMask[InputsFixed[0]] = InputsFixed[0]; | |||
15220 | SourceHalfMask[InputsFixed[0] ^ 1] = InputsFixed[1]; | |||
15221 | InputsFixed[1] = InputsFixed[0] ^ 1; | |||
15222 | } else if (!isWordClobbered(SourceHalfMask, InputsFixed[1]) && | |||
15223 | SourceHalfMask[InputsFixed[1] ^ 1] < 0) { | |||
15224 | SourceHalfMask[InputsFixed[1]] = InputsFixed[1]; | |||
15225 | SourceHalfMask[InputsFixed[1] ^ 1] = InputsFixed[0]; | |||
15226 | InputsFixed[0] = InputsFixed[1] ^ 1; | |||
15227 | } else if (SourceHalfMask[2 * ((InputsFixed[0] / 2) ^ 1)] < 0 && | |||
15228 | SourceHalfMask[2 * ((InputsFixed[0] / 2) ^ 1) + 1] < 0) { | |||
15229 | // The two inputs are in the same DWord but it is clobbered and the | |||
15230 | // adjacent DWord isn't used at all. Move both inputs to the free | |||
15231 | // slot. | |||
15232 | SourceHalfMask[2 * ((InputsFixed[0] / 2) ^ 1)] = InputsFixed[0]; | |||
15233 | SourceHalfMask[2 * ((InputsFixed[0] / 2) ^ 1) + 1] = InputsFixed[1]; | |||
15234 | InputsFixed[0] = 2 * ((InputsFixed[0] / 2) ^ 1); | |||
15235 | InputsFixed[1] = 2 * ((InputsFixed[0] / 2) ^ 1) + 1; | |||
15236 | } else { | |||
15237 | // The only way we hit this point is if there is no clobbering | |||
15238 | // (because there are no off-half inputs to this half) and there is no | |||
15239 | // free slot adjacent to one of the inputs. In this case, we have to | |||
15240 | // swap an input with a non-input. | |||
15241 | for (int i = 0; i < 4; ++i) | |||
15242 | assert((SourceHalfMask[i] < 0 || SourceHalfMask[i] == i) &&(static_cast <bool> ((SourceHalfMask[i] < 0 || SourceHalfMask [i] == i) && "We can't handle any clobbers here!") ? void (0) : __assert_fail ("(SourceHalfMask[i] < 0 || SourceHalfMask[i] == i) && \"We can't handle any clobbers here!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15243, __extension__ __PRETTY_FUNCTION__)) | |||
15243 | "We can't handle any clobbers here!")(static_cast <bool> ((SourceHalfMask[i] < 0 || SourceHalfMask [i] == i) && "We can't handle any clobbers here!") ? void (0) : __assert_fail ("(SourceHalfMask[i] < 0 || SourceHalfMask[i] == i) && \"We can't handle any clobbers here!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15243, __extension__ __PRETTY_FUNCTION__)); | |||
15244 | assert(InputsFixed[1] != (InputsFixed[0] ^ 1) &&(static_cast <bool> (InputsFixed[1] != (InputsFixed[0] ^ 1) && "Cannot have adjacent inputs here!") ? void (0 ) : __assert_fail ("InputsFixed[1] != (InputsFixed[0] ^ 1) && \"Cannot have adjacent inputs here!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15245, __extension__ __PRETTY_FUNCTION__)) | |||
15245 | "Cannot have adjacent inputs here!")(static_cast <bool> (InputsFixed[1] != (InputsFixed[0] ^ 1) && "Cannot have adjacent inputs here!") ? void (0 ) : __assert_fail ("InputsFixed[1] != (InputsFixed[0] ^ 1) && \"Cannot have adjacent inputs here!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15245, __extension__ __PRETTY_FUNCTION__)); | |||
15246 | ||||
15247 | SourceHalfMask[InputsFixed[0] ^ 1] = InputsFixed[1]; | |||
15248 | SourceHalfMask[InputsFixed[1]] = InputsFixed[0] ^ 1; | |||
15249 | ||||
15250 | // We also have to update the final source mask in this case because | |||
15251 | // it may need to undo the above swap. | |||
15252 | for (int &M : FinalSourceHalfMask) | |||
15253 | if (M == (InputsFixed[0] ^ 1) + SourceOffset) | |||
15254 | M = InputsFixed[1] + SourceOffset; | |||
15255 | else if (M == InputsFixed[1] + SourceOffset) | |||
15256 | M = (InputsFixed[0] ^ 1) + SourceOffset; | |||
15257 | ||||
15258 | InputsFixed[1] = InputsFixed[0] ^ 1; | |||
15259 | } | |||
15260 | ||||
15261 | // Point everything at the fixed inputs. | |||
15262 | for (int &M : HalfMask) | |||
15263 | if (M == IncomingInputs[0]) | |||
15264 | M = InputsFixed[0] + SourceOffset; | |||
15265 | else if (M == IncomingInputs[1]) | |||
15266 | M = InputsFixed[1] + SourceOffset; | |||
15267 | ||||
15268 | IncomingInputs[0] = InputsFixed[0] + SourceOffset; | |||
15269 | IncomingInputs[1] = InputsFixed[1] + SourceOffset; | |||
15270 | } | |||
15271 | } else { | |||
15272 | llvm_unreachable("Unhandled input size!")::llvm::llvm_unreachable_internal("Unhandled input size!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15272); | |||
15273 | } | |||
15274 | ||||
15275 | // Now hoist the DWord down to the right half. | |||
15276 | int FreeDWord = (PSHUFDMask[DestOffset / 2] < 0 ? 0 : 1) + DestOffset / 2; | |||
15277 | assert(PSHUFDMask[FreeDWord] < 0 && "DWord not free")(static_cast <bool> (PSHUFDMask[FreeDWord] < 0 && "DWord not free") ? void (0) : __assert_fail ("PSHUFDMask[FreeDWord] < 0 && \"DWord not free\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15277, __extension__ __PRETTY_FUNCTION__)); | |||
15278 | PSHUFDMask[FreeDWord] = IncomingInputs[0] / 2; | |||
15279 | for (int &M : HalfMask) | |||
15280 | for (int Input : IncomingInputs) | |||
15281 | if (M == Input) | |||
15282 | M = FreeDWord * 2 + Input % 2; | |||
15283 | }; | |||
15284 | moveInputsToRightHalf(HToLInputs, LToLInputs, PSHUFHMask, LoMask, HiMask, | |||
15285 | /*SourceOffset*/ 4, /*DestOffset*/ 0); | |||
15286 | moveInputsToRightHalf(LToHInputs, HToHInputs, PSHUFLMask, HiMask, LoMask, | |||
15287 | /*SourceOffset*/ 0, /*DestOffset*/ 4); | |||
15288 | ||||
15289 | // Now enact all the shuffles we've computed to move the inputs into their | |||
15290 | // target half. | |||
15291 | if (!isNoopShuffleMask(PSHUFLMask)) | |||
15292 | V = DAG.getNode(X86ISD::PSHUFLW, DL, VT, V, | |||
15293 | getV4X86ShuffleImm8ForMask(PSHUFLMask, DL, DAG)); | |||
15294 | if (!isNoopShuffleMask(PSHUFHMask)) | |||
15295 | V = DAG.getNode(X86ISD::PSHUFHW, DL, VT, V, | |||
15296 | getV4X86ShuffleImm8ForMask(PSHUFHMask, DL, DAG)); | |||
15297 | if (!isNoopShuffleMask(PSHUFDMask)) | |||
15298 | V = DAG.getBitcast( | |||
15299 | VT, | |||
15300 | DAG.getNode(X86ISD::PSHUFD, DL, PSHUFDVT, DAG.getBitcast(PSHUFDVT, V), | |||
15301 | getV4X86ShuffleImm8ForMask(PSHUFDMask, DL, DAG))); | |||
15302 | ||||
15303 | // At this point, each half should contain all its inputs, and we can then | |||
15304 | // just shuffle them into their final position. | |||
15305 | assert(count_if(LoMask, [](int M) { return M >= 4; }) == 0 &&(static_cast <bool> (count_if(LoMask, [](int M) { return M >= 4; }) == 0 && "Failed to lift all the high half inputs to the low mask!" ) ? void (0) : __assert_fail ("count_if(LoMask, [](int M) { return M >= 4; }) == 0 && \"Failed to lift all the high half inputs to the low mask!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15306, __extension__ __PRETTY_FUNCTION__)) | |||
15306 | "Failed to lift all the high half inputs to the low mask!")(static_cast <bool> (count_if(LoMask, [](int M) { return M >= 4; }) == 0 && "Failed to lift all the high half inputs to the low mask!" ) ? void (0) : __assert_fail ("count_if(LoMask, [](int M) { return M >= 4; }) == 0 && \"Failed to lift all the high half inputs to the low mask!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15306, __extension__ __PRETTY_FUNCTION__)); | |||
15307 | assert(count_if(HiMask, [](int M) { return M >= 0 && M < 4; }) == 0 &&(static_cast <bool> (count_if(HiMask, [](int M) { return M >= 0 && M < 4; }) == 0 && "Failed to lift all the low half inputs to the high mask!" ) ? void (0) : __assert_fail ("count_if(HiMask, [](int M) { return M >= 0 && M < 4; }) == 0 && \"Failed to lift all the low half inputs to the high mask!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15308, __extension__ __PRETTY_FUNCTION__)) | |||
15308 | "Failed to lift all the low half inputs to the high mask!")(static_cast <bool> (count_if(HiMask, [](int M) { return M >= 0 && M < 4; }) == 0 && "Failed to lift all the low half inputs to the high mask!" ) ? void (0) : __assert_fail ("count_if(HiMask, [](int M) { return M >= 0 && M < 4; }) == 0 && \"Failed to lift all the low half inputs to the high mask!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15308, __extension__ __PRETTY_FUNCTION__)); | |||
15309 | ||||
15310 | // Do a half shuffle for the low mask. | |||
15311 | if (!isNoopShuffleMask(LoMask)) | |||
15312 | V = DAG.getNode(X86ISD::PSHUFLW, DL, VT, V, | |||
15313 | getV4X86ShuffleImm8ForMask(LoMask, DL, DAG)); | |||
15314 | ||||
15315 | // Do a half shuffle with the high mask after shifting its values down. | |||
15316 | for (int &M : HiMask) | |||
15317 | if (M >= 0) | |||
15318 | M -= 4; | |||
15319 | if (!isNoopShuffleMask(HiMask)) | |||
15320 | V = DAG.getNode(X86ISD::PSHUFHW, DL, VT, V, | |||
15321 | getV4X86ShuffleImm8ForMask(HiMask, DL, DAG)); | |||
15322 | ||||
15323 | return V; | |||
15324 | } | |||
15325 | ||||
15326 | /// Helper to form a PSHUFB-based shuffle+blend, opportunistically avoiding the | |||
15327 | /// blend if only one input is used. | |||
15328 | static SDValue lowerShuffleAsBlendOfPSHUFBs( | |||
15329 | const SDLoc &DL, MVT VT, SDValue V1, SDValue V2, ArrayRef<int> Mask, | |||
15330 | const APInt &Zeroable, SelectionDAG &DAG, bool &V1InUse, bool &V2InUse) { | |||
15331 | assert(!is128BitLaneCrossingShuffleMask(VT, Mask) &&(static_cast <bool> (!is128BitLaneCrossingShuffleMask(VT , Mask) && "Lane crossing shuffle masks not supported" ) ? void (0) : __assert_fail ("!is128BitLaneCrossingShuffleMask(VT, Mask) && \"Lane crossing shuffle masks not supported\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15332, __extension__ __PRETTY_FUNCTION__)) | |||
15332 | "Lane crossing shuffle masks not supported")(static_cast <bool> (!is128BitLaneCrossingShuffleMask(VT , Mask) && "Lane crossing shuffle masks not supported" ) ? void (0) : __assert_fail ("!is128BitLaneCrossingShuffleMask(VT, Mask) && \"Lane crossing shuffle masks not supported\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15332, __extension__ __PRETTY_FUNCTION__)); | |||
15333 | ||||
15334 | int NumBytes = VT.getSizeInBits() / 8; | |||
15335 | int Size = Mask.size(); | |||
15336 | int Scale = NumBytes / Size; | |||
15337 | ||||
15338 | SmallVector<SDValue, 64> V1Mask(NumBytes, DAG.getUNDEF(MVT::i8)); | |||
15339 | SmallVector<SDValue, 64> V2Mask(NumBytes, DAG.getUNDEF(MVT::i8)); | |||
15340 | V1InUse = false; | |||
15341 | V2InUse = false; | |||
15342 | ||||
15343 | for (int i = 0; i < NumBytes; ++i) { | |||
15344 | int M = Mask[i / Scale]; | |||
15345 | if (M < 0) | |||
15346 | continue; | |||
15347 | ||||
15348 | const int ZeroMask = 0x80; | |||
15349 | int V1Idx = M < Size ? M * Scale + i % Scale : ZeroMask; | |||
15350 | int V2Idx = M < Size ? ZeroMask : (M - Size) * Scale + i % Scale; | |||
15351 | if (Zeroable[i / Scale]) | |||
15352 | V1Idx = V2Idx = ZeroMask; | |||
15353 | ||||
15354 | V1Mask[i] = DAG.getConstant(V1Idx, DL, MVT::i8); | |||
15355 | V2Mask[i] = DAG.getConstant(V2Idx, DL, MVT::i8); | |||
15356 | V1InUse |= (ZeroMask != V1Idx); | |||
15357 | V2InUse |= (ZeroMask != V2Idx); | |||
15358 | } | |||
15359 | ||||
15360 | MVT ShufVT = MVT::getVectorVT(MVT::i8, NumBytes); | |||
15361 | if (V1InUse) | |||
15362 | V1 = DAG.getNode(X86ISD::PSHUFB, DL, ShufVT, DAG.getBitcast(ShufVT, V1), | |||
15363 | DAG.getBuildVector(ShufVT, DL, V1Mask)); | |||
15364 | if (V2InUse) | |||
15365 | V2 = DAG.getNode(X86ISD::PSHUFB, DL, ShufVT, DAG.getBitcast(ShufVT, V2), | |||
15366 | DAG.getBuildVector(ShufVT, DL, V2Mask)); | |||
15367 | ||||
15368 | // If we need shuffled inputs from both, blend the two. | |||
15369 | SDValue V; | |||
15370 | if (V1InUse && V2InUse) | |||
15371 | V = DAG.getNode(ISD::OR, DL, ShufVT, V1, V2); | |||
15372 | else | |||
15373 | V = V1InUse ? V1 : V2; | |||
15374 | ||||
15375 | // Cast the result back to the correct type. | |||
15376 | return DAG.getBitcast(VT, V); | |||
15377 | } | |||
15378 | ||||
15379 | /// Generic lowering of 8-lane i16 shuffles. | |||
15380 | /// | |||
15381 | /// This handles both single-input shuffles and combined shuffle/blends with | |||
15382 | /// two inputs. The single input shuffles are immediately delegated to | |||
15383 | /// a dedicated lowering routine. | |||
15384 | /// | |||
15385 | /// The blends are lowered in one of three fundamental ways. If there are few | |||
15386 | /// enough inputs, it delegates to a basic UNPCK-based strategy. If the shuffle | |||
15387 | /// of the input is significantly cheaper when lowered as an interleaving of | |||
15388 | /// the two inputs, try to interleave them. Otherwise, blend the low and high | |||
15389 | /// halves of the inputs separately (making them have relatively few inputs) | |||
15390 | /// and then concatenate them. | |||
15391 | static SDValue lowerV8I16Shuffle(const SDLoc &DL, ArrayRef<int> Mask, | |||
15392 | const APInt &Zeroable, SDValue V1, SDValue V2, | |||
15393 | const X86Subtarget &Subtarget, | |||
15394 | SelectionDAG &DAG) { | |||
15395 | assert(V1.getSimpleValueType() == MVT::v8i16 && "Bad operand type!")(static_cast <bool> (V1.getSimpleValueType() == MVT::v8i16 && "Bad operand type!") ? void (0) : __assert_fail ( "V1.getSimpleValueType() == MVT::v8i16 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15395, __extension__ __PRETTY_FUNCTION__)); | |||
15396 | assert(V2.getSimpleValueType() == MVT::v8i16 && "Bad operand type!")(static_cast <bool> (V2.getSimpleValueType() == MVT::v8i16 && "Bad operand type!") ? void (0) : __assert_fail ( "V2.getSimpleValueType() == MVT::v8i16 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15396, __extension__ __PRETTY_FUNCTION__)); | |||
15397 | assert(Mask.size() == 8 && "Unexpected mask size for v8 shuffle!")(static_cast <bool> (Mask.size() == 8 && "Unexpected mask size for v8 shuffle!" ) ? void (0) : __assert_fail ("Mask.size() == 8 && \"Unexpected mask size for v8 shuffle!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15397, __extension__ __PRETTY_FUNCTION__)); | |||
15398 | ||||
15399 | // Whenever we can lower this as a zext, that instruction is strictly faster | |||
15400 | // than any alternative. | |||
15401 | if (SDValue ZExt = lowerShuffleAsZeroOrAnyExtend(DL, MVT::v8i16, V1, V2, Mask, | |||
15402 | Zeroable, Subtarget, DAG)) | |||
15403 | return ZExt; | |||
15404 | ||||
15405 | // Try to use lower using a truncation. | |||
15406 | if (SDValue V = lowerShuffleWithVPMOV(DL, MVT::v8i16, V1, V2, Mask, Zeroable, | |||
15407 | Subtarget, DAG)) | |||
15408 | return V; | |||
15409 | ||||
15410 | int NumV2Inputs = count_if(Mask, [](int M) { return M >= 8; }); | |||
15411 | ||||
15412 | if (NumV2Inputs == 0) { | |||
15413 | // Try to use shift instructions. | |||
15414 | if (SDValue Shift = lowerShuffleAsShift(DL, MVT::v8i16, V1, V1, Mask, | |||
15415 | Zeroable, Subtarget, DAG)) | |||
15416 | return Shift; | |||
15417 | ||||
15418 | // Check for being able to broadcast a single element. | |||
15419 | if (SDValue Broadcast = lowerShuffleAsBroadcast(DL, MVT::v8i16, V1, V2, | |||
15420 | Mask, Subtarget, DAG)) | |||
15421 | return Broadcast; | |||
15422 | ||||
15423 | // Try to use bit rotation instructions. | |||
15424 | if (SDValue Rotate = lowerShuffleAsBitRotate(DL, MVT::v8i16, V1, Mask, | |||
15425 | Subtarget, DAG)) | |||
15426 | return Rotate; | |||
15427 | ||||
15428 | // Use dedicated unpack instructions for masks that match their pattern. | |||
15429 | if (SDValue V = lowerShuffleWithUNPCK(DL, MVT::v8i16, Mask, V1, V2, DAG)) | |||
15430 | return V; | |||
15431 | ||||
15432 | // Use dedicated pack instructions for masks that match their pattern. | |||
15433 | if (SDValue V = lowerShuffleWithPACK(DL, MVT::v8i16, Mask, V1, V2, DAG, | |||
15434 | Subtarget)) | |||
15435 | return V; | |||
15436 | ||||
15437 | // Try to use byte rotation instructions. | |||
15438 | if (SDValue Rotate = lowerShuffleAsByteRotate(DL, MVT::v8i16, V1, V1, Mask, | |||
15439 | Subtarget, DAG)) | |||
15440 | return Rotate; | |||
15441 | ||||
15442 | // Make a copy of the mask so it can be modified. | |||
15443 | SmallVector<int, 8> MutableMask(Mask.begin(), Mask.end()); | |||
15444 | return lowerV8I16GeneralSingleInputShuffle(DL, MVT::v8i16, V1, MutableMask, | |||
15445 | Subtarget, DAG); | |||
15446 | } | |||
15447 | ||||
15448 | assert(llvm::any_of(Mask, [](int M) { return M >= 0 && M < 8; }) &&(static_cast <bool> (llvm::any_of(Mask, [](int M) { return M >= 0 && M < 8; }) && "All single-input shuffles should be canonicalized to be V1-input " "shuffles.") ? void (0) : __assert_fail ("llvm::any_of(Mask, [](int M) { return M >= 0 && M < 8; }) && \"All single-input shuffles should be canonicalized to be V1-input \" \"shuffles.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15450, __extension__ __PRETTY_FUNCTION__)) | |||
15449 | "All single-input shuffles should be canonicalized to be V1-input "(static_cast <bool> (llvm::any_of(Mask, [](int M) { return M >= 0 && M < 8; }) && "All single-input shuffles should be canonicalized to be V1-input " "shuffles.") ? void (0) : __assert_fail ("llvm::any_of(Mask, [](int M) { return M >= 0 && M < 8; }) && \"All single-input shuffles should be canonicalized to be V1-input \" \"shuffles.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15450, __extension__ __PRETTY_FUNCTION__)) | |||
15450 | "shuffles.")(static_cast <bool> (llvm::any_of(Mask, [](int M) { return M >= 0 && M < 8; }) && "All single-input shuffles should be canonicalized to be V1-input " "shuffles.") ? void (0) : __assert_fail ("llvm::any_of(Mask, [](int M) { return M >= 0 && M < 8; }) && \"All single-input shuffles should be canonicalized to be V1-input \" \"shuffles.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15450, __extension__ __PRETTY_FUNCTION__)); | |||
15451 | ||||
15452 | // Try to use shift instructions. | |||
15453 | if (SDValue Shift = lowerShuffleAsShift(DL, MVT::v8i16, V1, V2, Mask, | |||
15454 | Zeroable, Subtarget, DAG)) | |||
15455 | return Shift; | |||
15456 | ||||
15457 | // See if we can use SSE4A Extraction / Insertion. | |||
15458 | if (Subtarget.hasSSE4A()) | |||
15459 | if (SDValue V = lowerShuffleWithSSE4A(DL, MVT::v8i16, V1, V2, Mask, | |||
15460 | Zeroable, DAG)) | |||
15461 | return V; | |||
15462 | ||||
15463 | // There are special ways we can lower some single-element blends. | |||
15464 | if (NumV2Inputs == 1) | |||
15465 | if (SDValue V = lowerShuffleAsElementInsertion( | |||
15466 | DL, MVT::v8i16, V1, V2, Mask, Zeroable, Subtarget, DAG)) | |||
15467 | return V; | |||
15468 | ||||
15469 | // We have different paths for blend lowering, but they all must use the | |||
15470 | // *exact* same predicate. | |||
15471 | bool IsBlendSupported = Subtarget.hasSSE41(); | |||
15472 | if (IsBlendSupported) | |||
15473 | if (SDValue Blend = lowerShuffleAsBlend(DL, MVT::v8i16, V1, V2, Mask, | |||
15474 | Zeroable, Subtarget, DAG)) | |||
15475 | return Blend; | |||
15476 | ||||
15477 | if (SDValue Masked = lowerShuffleAsBitMask(DL, MVT::v8i16, V1, V2, Mask, | |||
15478 | Zeroable, Subtarget, DAG)) | |||
15479 | return Masked; | |||
15480 | ||||
15481 | // Use dedicated unpack instructions for masks that match their pattern. | |||
15482 | if (SDValue V = lowerShuffleWithUNPCK(DL, MVT::v8i16, Mask, V1, V2, DAG)) | |||
15483 | return V; | |||
15484 | ||||
15485 | // Use dedicated pack instructions for masks that match their pattern. | |||
15486 | if (SDValue V = lowerShuffleWithPACK(DL, MVT::v8i16, Mask, V1, V2, DAG, | |||
15487 | Subtarget)) | |||
15488 | return V; | |||
15489 | ||||
15490 | // Try to use lower using a truncation. | |||
15491 | if (SDValue V = lowerShuffleAsVTRUNC(DL, MVT::v8i16, V1, V2, Mask, Zeroable, | |||
15492 | Subtarget, DAG)) | |||
15493 | return V; | |||
15494 | ||||
15495 | // Try to use byte rotation instructions. | |||
15496 | if (SDValue Rotate = lowerShuffleAsByteRotate(DL, MVT::v8i16, V1, V2, Mask, | |||
15497 | Subtarget, DAG)) | |||
15498 | return Rotate; | |||
15499 | ||||
15500 | if (SDValue BitBlend = | |||
15501 | lowerShuffleAsBitBlend(DL, MVT::v8i16, V1, V2, Mask, DAG)) | |||
15502 | return BitBlend; | |||
15503 | ||||
15504 | // Try to use byte shift instructions to mask. | |||
15505 | if (SDValue V = lowerShuffleAsByteShiftMask(DL, MVT::v8i16, V1, V2, Mask, | |||
15506 | Zeroable, Subtarget, DAG)) | |||
15507 | return V; | |||
15508 | ||||
15509 | // Attempt to lower using compaction, SSE41 is necessary for PACKUSDW. | |||
15510 | // We could use SIGN_EXTEND_INREG+PACKSSDW for older targets but this seems to | |||
15511 | // be slower than a PSHUFLW+PSHUFHW+PSHUFD chain. | |||
15512 | int NumEvenDrops = canLowerByDroppingEvenElements(Mask, false); | |||
15513 | if ((NumEvenDrops == 1 || NumEvenDrops == 2) && Subtarget.hasSSE41() && | |||
15514 | !Subtarget.hasVLX()) { | |||
15515 | SmallVector<SDValue, 8> DWordClearOps(4, DAG.getConstant(0, DL, MVT::i32)); | |||
15516 | for (unsigned i = 0; i != 4; i += 1 << (NumEvenDrops - 1)) | |||
15517 | DWordClearOps[i] = DAG.getConstant(0xFFFF, DL, MVT::i32); | |||
15518 | SDValue DWordClearMask = DAG.getBuildVector(MVT::v4i32, DL, DWordClearOps); | |||
15519 | V1 = DAG.getNode(ISD::AND, DL, MVT::v4i32, DAG.getBitcast(MVT::v4i32, V1), | |||
15520 | DWordClearMask); | |||
15521 | V2 = DAG.getNode(ISD::AND, DL, MVT::v4i32, DAG.getBitcast(MVT::v4i32, V2), | |||
15522 | DWordClearMask); | |||
15523 | // Now pack things back together. | |||
15524 | SDValue Result = DAG.getNode(X86ISD::PACKUS, DL, MVT::v8i16, V1, V2); | |||
15525 | if (NumEvenDrops == 2) { | |||
15526 | Result = DAG.getBitcast(MVT::v4i32, Result); | |||
15527 | Result = DAG.getNode(X86ISD::PACKUS, DL, MVT::v8i16, Result, Result); | |||
15528 | } | |||
15529 | return Result; | |||
15530 | } | |||
15531 | ||||
15532 | // Try to lower by permuting the inputs into an unpack instruction. | |||
15533 | if (SDValue Unpack = lowerShuffleAsPermuteAndUnpack(DL, MVT::v8i16, V1, V2, | |||
15534 | Mask, Subtarget, DAG)) | |||
15535 | return Unpack; | |||
15536 | ||||
15537 | // If we can't directly blend but can use PSHUFB, that will be better as it | |||
15538 | // can both shuffle and set up the inefficient blend. | |||
15539 | if (!IsBlendSupported && Subtarget.hasSSSE3()) { | |||
15540 | bool V1InUse, V2InUse; | |||
15541 | return lowerShuffleAsBlendOfPSHUFBs(DL, MVT::v8i16, V1, V2, Mask, | |||
15542 | Zeroable, DAG, V1InUse, V2InUse); | |||
15543 | } | |||
15544 | ||||
15545 | // We can always bit-blend if we have to so the fallback strategy is to | |||
15546 | // decompose into single-input permutes and blends/unpacks. | |||
15547 | return lowerShuffleAsDecomposedShuffleMerge(DL, MVT::v8i16, V1, V2, | |||
15548 | Mask, Subtarget, DAG); | |||
15549 | } | |||
15550 | ||||
15551 | /// Lower 8-lane 16-bit floating point shuffles. | |||
15552 | static SDValue lowerV8F16Shuffle(const SDLoc &DL, ArrayRef<int> Mask, | |||
15553 | const APInt &Zeroable, SDValue V1, SDValue V2, | |||
15554 | const X86Subtarget &Subtarget, | |||
15555 | SelectionDAG &DAG) { | |||
15556 | assert(V1.getSimpleValueType() == MVT::v8f16 && "Bad operand type!")(static_cast <bool> (V1.getSimpleValueType() == MVT::v8f16 && "Bad operand type!") ? void (0) : __assert_fail ( "V1.getSimpleValueType() == MVT::v8f16 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15556, __extension__ __PRETTY_FUNCTION__)); | |||
15557 | assert(V2.getSimpleValueType() == MVT::v8f16 && "Bad operand type!")(static_cast <bool> (V2.getSimpleValueType() == MVT::v8f16 && "Bad operand type!") ? void (0) : __assert_fail ( "V2.getSimpleValueType() == MVT::v8f16 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15557, __extension__ __PRETTY_FUNCTION__)); | |||
15558 | assert(Mask.size() == 8 && "Unexpected mask size for v8 shuffle!")(static_cast <bool> (Mask.size() == 8 && "Unexpected mask size for v8 shuffle!" ) ? void (0) : __assert_fail ("Mask.size() == 8 && \"Unexpected mask size for v8 shuffle!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15558, __extension__ __PRETTY_FUNCTION__)); | |||
15559 | int NumV2Elements = count_if(Mask, [](int M) { return M >= 8; }); | |||
15560 | ||||
15561 | if (NumV2Elements == 0) { | |||
15562 | // Check for being able to broadcast a single element. | |||
15563 | if (SDValue Broadcast = lowerShuffleAsBroadcast(DL, MVT::v8f16, V1, V2, | |||
15564 | Mask, Subtarget, DAG)) | |||
15565 | return Broadcast; | |||
15566 | } | |||
15567 | if (NumV2Elements == 1 && Mask[0] >= 8) | |||
15568 | if (SDValue V = lowerShuffleAsElementInsertion(DL, MVT::v8f16, V1, V2, Mask, | |||
15569 | Zeroable, Subtarget, DAG)) | |||
15570 | return V; | |||
15571 | ||||
15572 | V1 = DAG.getBitcast(MVT::v8i16, V1); | |||
15573 | V2 = DAG.getBitcast(MVT::v8i16, V2); | |||
15574 | return DAG.getBitcast(MVT::v8f16, | |||
15575 | DAG.getVectorShuffle(MVT::v8i16, DL, V1, V2, Mask)); | |||
15576 | } | |||
15577 | ||||
15578 | // Lowers unary/binary shuffle as VPERMV/VPERMV3, for non-VLX targets, | |||
15579 | // sub-512-bit shuffles are padded to 512-bits for the shuffle and then | |||
15580 | // the active subvector is extracted. | |||
15581 | static SDValue lowerShuffleWithPERMV(const SDLoc &DL, MVT VT, | |||
15582 | ArrayRef<int> Mask, SDValue V1, SDValue V2, | |||
15583 | const X86Subtarget &Subtarget, | |||
15584 | SelectionDAG &DAG) { | |||
15585 | MVT MaskVT = VT.changeTypeToInteger(); | |||
15586 | SDValue MaskNode; | |||
15587 | MVT ShuffleVT = VT; | |||
15588 | if (!VT.is512BitVector() && !Subtarget.hasVLX()) { | |||
15589 | V1 = widenSubVector(V1, false, Subtarget, DAG, DL, 512); | |||
15590 | V2 = widenSubVector(V2, false, Subtarget, DAG, DL, 512); | |||
15591 | ShuffleVT = V1.getSimpleValueType(); | |||
15592 | ||||
15593 | // Adjust mask to correct indices for the second input. | |||
15594 | int NumElts = VT.getVectorNumElements(); | |||
15595 | unsigned Scale = 512 / VT.getSizeInBits(); | |||
15596 | SmallVector<int, 32> AdjustedMask(Mask.begin(), Mask.end()); | |||
15597 | for (int &M : AdjustedMask) | |||
15598 | if (NumElts <= M) | |||
15599 | M += (Scale - 1) * NumElts; | |||
15600 | MaskNode = getConstVector(AdjustedMask, MaskVT, DAG, DL, true); | |||
15601 | MaskNode = widenSubVector(MaskNode, false, Subtarget, DAG, DL, 512); | |||
15602 | } else { | |||
15603 | MaskNode = getConstVector(Mask, MaskVT, DAG, DL, true); | |||
15604 | } | |||
15605 | ||||
15606 | SDValue Result; | |||
15607 | if (V2.isUndef()) | |||
15608 | Result = DAG.getNode(X86ISD::VPERMV, DL, ShuffleVT, MaskNode, V1); | |||
15609 | else | |||
15610 | Result = DAG.getNode(X86ISD::VPERMV3, DL, ShuffleVT, V1, MaskNode, V2); | |||
15611 | ||||
15612 | if (VT != ShuffleVT) | |||
15613 | Result = extractSubVector(Result, 0, DAG, DL, VT.getSizeInBits()); | |||
15614 | ||||
15615 | return Result; | |||
15616 | } | |||
15617 | ||||
15618 | /// Generic lowering of v16i8 shuffles. | |||
15619 | /// | |||
15620 | /// This is a hybrid strategy to lower v16i8 vectors. It first attempts to | |||
15621 | /// detect any complexity reducing interleaving. If that doesn't help, it uses | |||
15622 | /// UNPCK to spread the i8 elements across two i16-element vectors, and uses | |||
15623 | /// the existing lowering for v8i16 blends on each half, finally PACK-ing them | |||
15624 | /// back together. | |||
15625 | static SDValue lowerV16I8Shuffle(const SDLoc &DL, ArrayRef<int> Mask, | |||
15626 | const APInt &Zeroable, SDValue V1, SDValue V2, | |||
15627 | const X86Subtarget &Subtarget, | |||
15628 | SelectionDAG &DAG) { | |||
15629 | assert(V1.getSimpleValueType() == MVT::v16i8 && "Bad operand type!")(static_cast <bool> (V1.getSimpleValueType() == MVT::v16i8 && "Bad operand type!") ? void (0) : __assert_fail ( "V1.getSimpleValueType() == MVT::v16i8 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15629, __extension__ __PRETTY_FUNCTION__)); | |||
15630 | assert(V2.getSimpleValueType() == MVT::v16i8 && "Bad operand type!")(static_cast <bool> (V2.getSimpleValueType() == MVT::v16i8 && "Bad operand type!") ? void (0) : __assert_fail ( "V2.getSimpleValueType() == MVT::v16i8 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15630, __extension__ __PRETTY_FUNCTION__)); | |||
15631 | assert(Mask.size() == 16 && "Unexpected mask size for v16 shuffle!")(static_cast <bool> (Mask.size() == 16 && "Unexpected mask size for v16 shuffle!" ) ? void (0) : __assert_fail ("Mask.size() == 16 && \"Unexpected mask size for v16 shuffle!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15631, __extension__ __PRETTY_FUNCTION__)); | |||
15632 | ||||
15633 | // Try to use shift instructions. | |||
15634 | if (SDValue Shift = lowerShuffleAsShift(DL, MVT::v16i8, V1, V2, Mask, | |||
15635 | Zeroable, Subtarget, DAG)) | |||
15636 | return Shift; | |||
15637 | ||||
15638 | // Try to use byte rotation instructions. | |||
15639 | if (SDValue Rotate = lowerShuffleAsByteRotate(DL, MVT::v16i8, V1, V2, Mask, | |||
15640 | Subtarget, DAG)) | |||
15641 | return Rotate; | |||
15642 | ||||
15643 | // Use dedicated pack instructions for masks that match their pattern. | |||
15644 | if (SDValue V = lowerShuffleWithPACK(DL, MVT::v16i8, Mask, V1, V2, DAG, | |||
15645 | Subtarget)) | |||
15646 | return V; | |||
15647 | ||||
15648 | // Try to use a zext lowering. | |||
15649 | if (SDValue ZExt = lowerShuffleAsZeroOrAnyExtend(DL, MVT::v16i8, V1, V2, Mask, | |||
15650 | Zeroable, Subtarget, DAG)) | |||
15651 | return ZExt; | |||
15652 | ||||
15653 | // Try to use lower using a truncation. | |||
15654 | if (SDValue V = lowerShuffleWithVPMOV(DL, MVT::v16i8, V1, V2, Mask, Zeroable, | |||
15655 | Subtarget, DAG)) | |||
15656 | return V; | |||
15657 | ||||
15658 | if (SDValue V = lowerShuffleAsVTRUNC(DL, MVT::v16i8, V1, V2, Mask, Zeroable, | |||
15659 | Subtarget, DAG)) | |||
15660 | return V; | |||
15661 | ||||
15662 | // See if we can use SSE4A Extraction / Insertion. | |||
15663 | if (Subtarget.hasSSE4A()) | |||
15664 | if (SDValue V = lowerShuffleWithSSE4A(DL, MVT::v16i8, V1, V2, Mask, | |||
15665 | Zeroable, DAG)) | |||
15666 | return V; | |||
15667 | ||||
15668 | int NumV2Elements = count_if(Mask, [](int M) { return M >= 16; }); | |||
15669 | ||||
15670 | // For single-input shuffles, there are some nicer lowering tricks we can use. | |||
15671 | if (NumV2Elements == 0) { | |||
15672 | // Check for being able to broadcast a single element. | |||
15673 | if (SDValue Broadcast = lowerShuffleAsBroadcast(DL, MVT::v16i8, V1, V2, | |||
15674 | Mask, Subtarget, DAG)) | |||
15675 | return Broadcast; | |||
15676 | ||||
15677 | // Try to use bit rotation instructions. | |||
15678 | if (SDValue Rotate = lowerShuffleAsBitRotate(DL, MVT::v16i8, V1, Mask, | |||
15679 | Subtarget, DAG)) | |||
15680 | return Rotate; | |||
15681 | ||||
15682 | if (SDValue V = lowerShuffleWithUNPCK(DL, MVT::v16i8, Mask, V1, V2, DAG)) | |||
15683 | return V; | |||
15684 | ||||
15685 | // Check whether we can widen this to an i16 shuffle by duplicating bytes. | |||
15686 | // Notably, this handles splat and partial-splat shuffles more efficiently. | |||
15687 | // However, it only makes sense if the pre-duplication shuffle simplifies | |||
15688 | // things significantly. Currently, this means we need to be able to | |||
15689 | // express the pre-duplication shuffle as an i16 shuffle. | |||
15690 | // | |||
15691 | // FIXME: We should check for other patterns which can be widened into an | |||
15692 | // i16 shuffle as well. | |||
15693 | auto canWidenViaDuplication = [](ArrayRef<int> Mask) { | |||
15694 | for (int i = 0; i < 16; i += 2) | |||
15695 | if (Mask[i] >= 0 && Mask[i + 1] >= 0 && Mask[i] != Mask[i + 1]) | |||
15696 | return false; | |||
15697 | ||||
15698 | return true; | |||
15699 | }; | |||
15700 | auto tryToWidenViaDuplication = [&]() -> SDValue { | |||
15701 | if (!canWidenViaDuplication(Mask)) | |||
15702 | return SDValue(); | |||
15703 | SmallVector<int, 4> LoInputs; | |||
15704 | copy_if(Mask, std::back_inserter(LoInputs), | |||
15705 | [](int M) { return M >= 0 && M < 8; }); | |||
15706 | array_pod_sort(LoInputs.begin(), LoInputs.end()); | |||
15707 | LoInputs.erase(std::unique(LoInputs.begin(), LoInputs.end()), | |||
15708 | LoInputs.end()); | |||
15709 | SmallVector<int, 4> HiInputs; | |||
15710 | copy_if(Mask, std::back_inserter(HiInputs), [](int M) { return M >= 8; }); | |||
15711 | array_pod_sort(HiInputs.begin(), HiInputs.end()); | |||
15712 | HiInputs.erase(std::unique(HiInputs.begin(), HiInputs.end()), | |||
15713 | HiInputs.end()); | |||
15714 | ||||
15715 | bool TargetLo = LoInputs.size() >= HiInputs.size(); | |||
15716 | ArrayRef<int> InPlaceInputs = TargetLo ? LoInputs : HiInputs; | |||
15717 | ArrayRef<int> MovingInputs = TargetLo ? HiInputs : LoInputs; | |||
15718 | ||||
15719 | int PreDupI16Shuffle[] = {-1, -1, -1, -1, -1, -1, -1, -1}; | |||
15720 | SmallDenseMap<int, int, 8> LaneMap; | |||
15721 | for (int I : InPlaceInputs) { | |||
15722 | PreDupI16Shuffle[I/2] = I/2; | |||
15723 | LaneMap[I] = I; | |||
15724 | } | |||
15725 | int j = TargetLo ? 0 : 4, je = j + 4; | |||
15726 | for (int i = 0, ie = MovingInputs.size(); i < ie; ++i) { | |||
15727 | // Check if j is already a shuffle of this input. This happens when | |||
15728 | // there are two adjacent bytes after we move the low one. | |||
15729 | if (PreDupI16Shuffle[j] != MovingInputs[i] / 2) { | |||
15730 | // If we haven't yet mapped the input, search for a slot into which | |||
15731 | // we can map it. | |||
15732 | while (j < je && PreDupI16Shuffle[j] >= 0) | |||
15733 | ++j; | |||
15734 | ||||
15735 | if (j == je) | |||
15736 | // We can't place the inputs into a single half with a simple i16 shuffle, so bail. | |||
15737 | return SDValue(); | |||
15738 | ||||
15739 | // Map this input with the i16 shuffle. | |||
15740 | PreDupI16Shuffle[j] = MovingInputs[i] / 2; | |||
15741 | } | |||
15742 | ||||
15743 | // Update the lane map based on the mapping we ended up with. | |||
15744 | LaneMap[MovingInputs[i]] = 2 * j + MovingInputs[i] % 2; | |||
15745 | } | |||
15746 | V1 = DAG.getBitcast( | |||
15747 | MVT::v16i8, | |||
15748 | DAG.getVectorShuffle(MVT::v8i16, DL, DAG.getBitcast(MVT::v8i16, V1), | |||
15749 | DAG.getUNDEF(MVT::v8i16), PreDupI16Shuffle)); | |||
15750 | ||||
15751 | // Unpack the bytes to form the i16s that will be shuffled into place. | |||
15752 | bool EvenInUse = false, OddInUse = false; | |||
15753 | for (int i = 0; i < 16; i += 2) { | |||
15754 | EvenInUse |= (Mask[i + 0] >= 0); | |||
15755 | OddInUse |= (Mask[i + 1] >= 0); | |||
15756 | if (EvenInUse && OddInUse) | |||
15757 | break; | |||
15758 | } | |||
15759 | V1 = DAG.getNode(TargetLo ? X86ISD::UNPCKL : X86ISD::UNPCKH, DL, | |||
15760 | MVT::v16i8, EvenInUse ? V1 : DAG.getUNDEF(MVT::v16i8), | |||
15761 | OddInUse ? V1 : DAG.getUNDEF(MVT::v16i8)); | |||
15762 | ||||
15763 | int PostDupI16Shuffle[8] = {-1, -1, -1, -1, -1, -1, -1, -1}; | |||
15764 | for (int i = 0; i < 16; ++i) | |||
15765 | if (Mask[i] >= 0) { | |||
15766 | int MappedMask = LaneMap[Mask[i]] - (TargetLo ? 0 : 8); | |||
15767 | assert(MappedMask < 8 && "Invalid v8 shuffle mask!")(static_cast <bool> (MappedMask < 8 && "Invalid v8 shuffle mask!" ) ? void (0) : __assert_fail ("MappedMask < 8 && \"Invalid v8 shuffle mask!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15767, __extension__ __PRETTY_FUNCTION__)); | |||
15768 | if (PostDupI16Shuffle[i / 2] < 0) | |||
15769 | PostDupI16Shuffle[i / 2] = MappedMask; | |||
15770 | else | |||
15771 | assert(PostDupI16Shuffle[i / 2] == MappedMask &&(static_cast <bool> (PostDupI16Shuffle[i / 2] == MappedMask && "Conflicting entries in the original shuffle!") ? void (0) : __assert_fail ("PostDupI16Shuffle[i / 2] == MappedMask && \"Conflicting entries in the original shuffle!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15772, __extension__ __PRETTY_FUNCTION__)) | |||
15772 | "Conflicting entries in the original shuffle!")(static_cast <bool> (PostDupI16Shuffle[i / 2] == MappedMask && "Conflicting entries in the original shuffle!") ? void (0) : __assert_fail ("PostDupI16Shuffle[i / 2] == MappedMask && \"Conflicting entries in the original shuffle!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15772, __extension__ __PRETTY_FUNCTION__)); | |||
15773 | } | |||
15774 | return DAG.getBitcast( | |||
15775 | MVT::v16i8, | |||
15776 | DAG.getVectorShuffle(MVT::v8i16, DL, DAG.getBitcast(MVT::v8i16, V1), | |||
15777 | DAG.getUNDEF(MVT::v8i16), PostDupI16Shuffle)); | |||
15778 | }; | |||
15779 | if (SDValue V = tryToWidenViaDuplication()) | |||
15780 | return V; | |||
15781 | } | |||
15782 | ||||
15783 | if (SDValue Masked = lowerShuffleAsBitMask(DL, MVT::v16i8, V1, V2, Mask, | |||
15784 | Zeroable, Subtarget, DAG)) | |||
15785 | return Masked; | |||
15786 | ||||
15787 | // Use dedicated unpack instructions for masks that match their pattern. | |||
15788 | if (SDValue V = lowerShuffleWithUNPCK(DL, MVT::v16i8, Mask, V1, V2, DAG)) | |||
15789 | return V; | |||
15790 | ||||
15791 | // Try to use byte shift instructions to mask. | |||
15792 | if (SDValue V = lowerShuffleAsByteShiftMask(DL, MVT::v16i8, V1, V2, Mask, | |||
15793 | Zeroable, Subtarget, DAG)) | |||
15794 | return V; | |||
15795 | ||||
15796 | // Check for compaction patterns. | |||
15797 | bool IsSingleInput = V2.isUndef(); | |||
15798 | int NumEvenDrops = canLowerByDroppingEvenElements(Mask, IsSingleInput); | |||
15799 | ||||
15800 | // Check for SSSE3 which lets us lower all v16i8 shuffles much more directly | |||
15801 | // with PSHUFB. It is important to do this before we attempt to generate any | |||
15802 | // blends but after all of the single-input lowerings. If the single input | |||
15803 | // lowerings can find an instruction sequence that is faster than a PSHUFB, we | |||
15804 | // want to preserve that and we can DAG combine any longer sequences into | |||
15805 | // a PSHUFB in the end. But once we start blending from multiple inputs, | |||
15806 | // the complexity of DAG combining bad patterns back into PSHUFB is too high, | |||
15807 | // and there are *very* few patterns that would actually be faster than the | |||
15808 | // PSHUFB approach because of its ability to zero lanes. | |||
15809 | // | |||
15810 | // If the mask is a binary compaction, we can more efficiently perform this | |||
15811 | // as a PACKUS(AND(),AND()) - which is quicker than UNPACK(PSHUFB(),PSHUFB()). | |||
15812 | // | |||
15813 | // FIXME: The only exceptions to the above are blends which are exact | |||
15814 | // interleavings with direct instructions supporting them. We currently don't | |||
15815 | // handle those well here. | |||
15816 | if (Subtarget.hasSSSE3() && (IsSingleInput || NumEvenDrops != 1)) { | |||
15817 | bool V1InUse = false; | |||
15818 | bool V2InUse = false; | |||
15819 | ||||
15820 | SDValue PSHUFB = lowerShuffleAsBlendOfPSHUFBs( | |||
15821 | DL, MVT::v16i8, V1, V2, Mask, Zeroable, DAG, V1InUse, V2InUse); | |||
15822 | ||||
15823 | // If both V1 and V2 are in use and we can use a direct blend or an unpack, | |||
15824 | // do so. This avoids using them to handle blends-with-zero which is | |||
15825 | // important as a single pshufb is significantly faster for that. | |||
15826 | if (V1InUse && V2InUse) { | |||
15827 | if (Subtarget.hasSSE41()) | |||
15828 | if (SDValue Blend = lowerShuffleAsBlend(DL, MVT::v16i8, V1, V2, Mask, | |||
15829 | Zeroable, Subtarget, DAG)) | |||
15830 | return Blend; | |||
15831 | ||||
15832 | // We can use an unpack to do the blending rather than an or in some | |||
15833 | // cases. Even though the or may be (very minorly) more efficient, we | |||
15834 | // preference this lowering because there are common cases where part of | |||
15835 | // the complexity of the shuffles goes away when we do the final blend as | |||
15836 | // an unpack. | |||
15837 | // FIXME: It might be worth trying to detect if the unpack-feeding | |||
15838 | // shuffles will both be pshufb, in which case we shouldn't bother with | |||
15839 | // this. | |||
15840 | if (SDValue Unpack = lowerShuffleAsPermuteAndUnpack( | |||
15841 | DL, MVT::v16i8, V1, V2, Mask, Subtarget, DAG)) | |||
15842 | return Unpack; | |||
15843 | ||||
15844 | // AVX512VBMI can lower to VPERMB (non-VLX will pad to v64i8). | |||
15845 | if (Subtarget.hasVBMI()) | |||
15846 | return lowerShuffleWithPERMV(DL, MVT::v16i8, Mask, V1, V2, Subtarget, | |||
15847 | DAG); | |||
15848 | ||||
15849 | // If we have XOP we can use one VPPERM instead of multiple PSHUFBs. | |||
15850 | if (Subtarget.hasXOP()) { | |||
15851 | SDValue MaskNode = getConstVector(Mask, MVT::v16i8, DAG, DL, true); | |||
15852 | return DAG.getNode(X86ISD::VPPERM, DL, MVT::v16i8, V1, V2, MaskNode); | |||
15853 | } | |||
15854 | ||||
15855 | // Use PALIGNR+Permute if possible - permute might become PSHUFB but the | |||
15856 | // PALIGNR will be cheaper than the second PSHUFB+OR. | |||
15857 | if (SDValue V = lowerShuffleAsByteRotateAndPermute( | |||
15858 | DL, MVT::v16i8, V1, V2, Mask, Subtarget, DAG)) | |||
15859 | return V; | |||
15860 | } | |||
15861 | ||||
15862 | return PSHUFB; | |||
15863 | } | |||
15864 | ||||
15865 | // There are special ways we can lower some single-element blends. | |||
15866 | if (NumV2Elements == 1) | |||
15867 | if (SDValue V = lowerShuffleAsElementInsertion( | |||
15868 | DL, MVT::v16i8, V1, V2, Mask, Zeroable, Subtarget, DAG)) | |||
15869 | return V; | |||
15870 | ||||
15871 | if (SDValue Blend = lowerShuffleAsBitBlend(DL, MVT::v16i8, V1, V2, Mask, DAG)) | |||
15872 | return Blend; | |||
15873 | ||||
15874 | // Check whether a compaction lowering can be done. This handles shuffles | |||
15875 | // which take every Nth element for some even N. See the helper function for | |||
15876 | // details. | |||
15877 | // | |||
15878 | // We special case these as they can be particularly efficiently handled with | |||
15879 | // the PACKUSB instruction on x86 and they show up in common patterns of | |||
15880 | // rearranging bytes to truncate wide elements. | |||
15881 | if (NumEvenDrops) { | |||
15882 | // NumEvenDrops is the power of two stride of the elements. Another way of | |||
15883 | // thinking about it is that we need to drop the even elements this many | |||
15884 | // times to get the original input. | |||
15885 | ||||
15886 | // First we need to zero all the dropped bytes. | |||
15887 | assert(NumEvenDrops <= 3 &&(static_cast <bool> (NumEvenDrops <= 3 && "No support for dropping even elements more than 3 times." ) ? void (0) : __assert_fail ("NumEvenDrops <= 3 && \"No support for dropping even elements more than 3 times.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15888, __extension__ __PRETTY_FUNCTION__)) | |||
15888 | "No support for dropping even elements more than 3 times.")(static_cast <bool> (NumEvenDrops <= 3 && "No support for dropping even elements more than 3 times." ) ? void (0) : __assert_fail ("NumEvenDrops <= 3 && \"No support for dropping even elements more than 3 times.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15888, __extension__ __PRETTY_FUNCTION__)); | |||
15889 | SmallVector<SDValue, 8> WordClearOps(8, DAG.getConstant(0, DL, MVT::i16)); | |||
15890 | for (unsigned i = 0; i != 8; i += 1 << (NumEvenDrops - 1)) | |||
15891 | WordClearOps[i] = DAG.getConstant(0xFF, DL, MVT::i16); | |||
15892 | SDValue WordClearMask = DAG.getBuildVector(MVT::v8i16, DL, WordClearOps); | |||
15893 | V1 = DAG.getNode(ISD::AND, DL, MVT::v8i16, DAG.getBitcast(MVT::v8i16, V1), | |||
15894 | WordClearMask); | |||
15895 | if (!IsSingleInput) | |||
15896 | V2 = DAG.getNode(ISD::AND, DL, MVT::v8i16, DAG.getBitcast(MVT::v8i16, V2), | |||
15897 | WordClearMask); | |||
15898 | ||||
15899 | // Now pack things back together. | |||
15900 | SDValue Result = DAG.getNode(X86ISD::PACKUS, DL, MVT::v16i8, V1, | |||
15901 | IsSingleInput ? V1 : V2); | |||
15902 | for (int i = 1; i < NumEvenDrops; ++i) { | |||
15903 | Result = DAG.getBitcast(MVT::v8i16, Result); | |||
15904 | Result = DAG.getNode(X86ISD::PACKUS, DL, MVT::v16i8, Result, Result); | |||
15905 | } | |||
15906 | return Result; | |||
15907 | } | |||
15908 | ||||
15909 | // Handle multi-input cases by blending/unpacking single-input shuffles. | |||
15910 | if (NumV2Elements > 0) | |||
15911 | return lowerShuffleAsDecomposedShuffleMerge(DL, MVT::v16i8, V1, V2, Mask, | |||
15912 | Subtarget, DAG); | |||
15913 | ||||
15914 | // The fallback path for single-input shuffles widens this into two v8i16 | |||
15915 | // vectors with unpacks, shuffles those, and then pulls them back together | |||
15916 | // with a pack. | |||
15917 | SDValue V = V1; | |||
15918 | ||||
15919 | std::array<int, 8> LoBlendMask = {{-1, -1, -1, -1, -1, -1, -1, -1}}; | |||
15920 | std::array<int, 8> HiBlendMask = {{-1, -1, -1, -1, -1, -1, -1, -1}}; | |||
15921 | for (int i = 0; i < 16; ++i) | |||
15922 | if (Mask[i] >= 0) | |||
15923 | (i < 8 ? LoBlendMask[i] : HiBlendMask[i % 8]) = Mask[i]; | |||
15924 | ||||
15925 | SDValue VLoHalf, VHiHalf; | |||
15926 | // Check if any of the odd lanes in the v16i8 are used. If not, we can mask | |||
15927 | // them out and avoid using UNPCK{L,H} to extract the elements of V as | |||
15928 | // i16s. | |||
15929 | if (none_of(LoBlendMask, [](int M) { return M >= 0 && M % 2 == 1; }) && | |||
15930 | none_of(HiBlendMask, [](int M) { return M >= 0 && M % 2 == 1; })) { | |||
15931 | // Use a mask to drop the high bytes. | |||
15932 | VLoHalf = DAG.getBitcast(MVT::v8i16, V); | |||
15933 | VLoHalf = DAG.getNode(ISD::AND, DL, MVT::v8i16, VLoHalf, | |||
15934 | DAG.getConstant(0x00FF, DL, MVT::v8i16)); | |||
15935 | ||||
15936 | // This will be a single vector shuffle instead of a blend so nuke VHiHalf. | |||
15937 | VHiHalf = DAG.getUNDEF(MVT::v8i16); | |||
15938 | ||||
15939 | // Squash the masks to point directly into VLoHalf. | |||
15940 | for (int &M : LoBlendMask) | |||
15941 | if (M >= 0) | |||
15942 | M /= 2; | |||
15943 | for (int &M : HiBlendMask) | |||
15944 | if (M >= 0) | |||
15945 | M /= 2; | |||
15946 | } else { | |||
15947 | // Otherwise just unpack the low half of V into VLoHalf and the high half into | |||
15948 | // VHiHalf so that we can blend them as i16s. | |||
15949 | SDValue Zero = getZeroVector(MVT::v16i8, Subtarget, DAG, DL); | |||
15950 | ||||
15951 | VLoHalf = DAG.getBitcast( | |||
15952 | MVT::v8i16, DAG.getNode(X86ISD::UNPCKL, DL, MVT::v16i8, V, Zero)); | |||
15953 | VHiHalf = DAG.getBitcast( | |||
15954 | MVT::v8i16, DAG.getNode(X86ISD::UNPCKH, DL, MVT::v16i8, V, Zero)); | |||
15955 | } | |||
15956 | ||||
15957 | SDValue LoV = DAG.getVectorShuffle(MVT::v8i16, DL, VLoHalf, VHiHalf, LoBlendMask); | |||
15958 | SDValue HiV = DAG.getVectorShuffle(MVT::v8i16, DL, VLoHalf, VHiHalf, HiBlendMask); | |||
15959 | ||||
15960 | return DAG.getNode(X86ISD::PACKUS, DL, MVT::v16i8, LoV, HiV); | |||
15961 | } | |||
15962 | ||||
15963 | /// Dispatching routine to lower various 128-bit x86 vector shuffles. | |||
15964 | /// | |||
15965 | /// This routine breaks down the specific type of 128-bit shuffle and | |||
15966 | /// dispatches to the lowering routines accordingly. | |||
15967 | static SDValue lower128BitShuffle(const SDLoc &DL, ArrayRef<int> Mask, | |||
15968 | MVT VT, SDValue V1, SDValue V2, | |||
15969 | const APInt &Zeroable, | |||
15970 | const X86Subtarget &Subtarget, | |||
15971 | SelectionDAG &DAG) { | |||
15972 | switch (VT.SimpleTy) { | |||
15973 | case MVT::v2i64: | |||
15974 | return lowerV2I64Shuffle(DL, Mask, Zeroable, V1, V2, Subtarget, DAG); | |||
15975 | case MVT::v2f64: | |||
15976 | return lowerV2F64Shuffle(DL, Mask, Zeroable, V1, V2, Subtarget, DAG); | |||
15977 | case MVT::v4i32: | |||
15978 | return lowerV4I32Shuffle(DL, Mask, Zeroable, V1, V2, Subtarget, DAG); | |||
15979 | case MVT::v4f32: | |||
15980 | return lowerV4F32Shuffle(DL, Mask, Zeroable, V1, V2, Subtarget, DAG); | |||
15981 | case MVT::v8i16: | |||
15982 | return lowerV8I16Shuffle(DL, Mask, Zeroable, V1, V2, Subtarget, DAG); | |||
15983 | case MVT::v8f16: | |||
15984 | return lowerV8F16Shuffle(DL, Mask, Zeroable, V1, V2, Subtarget, DAG); | |||
15985 | case MVT::v16i8: | |||
15986 | return lowerV16I8Shuffle(DL, Mask, Zeroable, V1, V2, Subtarget, DAG); | |||
15987 | ||||
15988 | default: | |||
15989 | llvm_unreachable("Unimplemented!")::llvm::llvm_unreachable_internal("Unimplemented!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 15989); | |||
15990 | } | |||
15991 | } | |||
15992 | ||||
15993 | /// Generic routine to split vector shuffle into half-sized shuffles. | |||
15994 | /// | |||
15995 | /// This routine just extracts two subvectors, shuffles them independently, and | |||
15996 | /// then concatenates them back together. This should work effectively with all | |||
15997 | /// AVX vector shuffle types. | |||
15998 | static SDValue splitAndLowerShuffle(const SDLoc &DL, MVT VT, SDValue V1, | |||
15999 | SDValue V2, ArrayRef<int> Mask, | |||
16000 | SelectionDAG &DAG) { | |||
16001 | assert(VT.getSizeInBits() >= 256 &&(static_cast <bool> (VT.getSizeInBits() >= 256 && "Only for 256-bit or wider vector shuffles!") ? void (0) : __assert_fail ("VT.getSizeInBits() >= 256 && \"Only for 256-bit or wider vector shuffles!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 16002, __extension__ __PRETTY_FUNCTION__)) | |||
16002 | "Only for 256-bit or wider vector shuffles!")(static_cast <bool> (VT.getSizeInBits() >= 256 && "Only for 256-bit or wider vector shuffles!") ? void (0) : __assert_fail ("VT.getSizeInBits() >= 256 && \"Only for 256-bit or wider vector shuffles!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 16002, __extension__ __PRETTY_FUNCTION__)); | |||
16003 | assert(V1.getSimpleValueType() == VT && "Bad operand type!")(static_cast <bool> (V1.getSimpleValueType() == VT && "Bad operand type!") ? void (0) : __assert_fail ("V1.getSimpleValueType() == VT && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 16003, __extension__ __PRETTY_FUNCTION__)); | |||
16004 | assert(V2.getSimpleValueType() == VT && "Bad operand type!")(static_cast <bool> (V2.getSimpleValueType() == VT && "Bad operand type!") ? void (0) : __assert_fail ("V2.getSimpleValueType() == VT && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 16004, __extension__ __PRETTY_FUNCTION__)); | |||
16005 | ||||
16006 | ArrayRef<int> LoMask = Mask.slice(0, Mask.size() / 2); | |||
16007 | ArrayRef<int> HiMask = Mask.slice(Mask.size() / 2); | |||
16008 | ||||
16009 | int NumElements = VT.getVectorNumElements(); | |||
16010 | int SplitNumElements = NumElements / 2; | |||
16011 | MVT ScalarVT = VT.getVectorElementType(); | |||
16012 | MVT SplitVT = MVT::getVectorVT(ScalarVT, SplitNumElements); | |||
16013 | ||||
16014 | // Use splitVector/extractSubVector so that split build-vectors just build two | |||
16015 | // narrower build vectors. This helps shuffling with splats and zeros. | |||
16016 | auto SplitVector = [&](SDValue V) { | |||
16017 | SDValue LoV, HiV; | |||
16018 | std::tie(LoV, HiV) = splitVector(peekThroughBitcasts(V), DAG, DL); | |||
16019 | return std::make_pair(DAG.getBitcast(SplitVT, LoV), | |||
16020 | DAG.getBitcast(SplitVT, HiV)); | |||
16021 | }; | |||
16022 | ||||
16023 | SDValue LoV1, HiV1, LoV2, HiV2; | |||
16024 | std::tie(LoV1, HiV1) = SplitVector(V1); | |||
16025 | std::tie(LoV2, HiV2) = SplitVector(V2); | |||
16026 | ||||
16027 | // Now create two 4-way blends of these half-width vectors. | |||
16028 | auto HalfBlend = [&](ArrayRef<int> HalfMask) { | |||
16029 | bool UseLoV1 = false, UseHiV1 = false, UseLoV2 = false, UseHiV2 = false; | |||
16030 | SmallVector<int, 32> V1BlendMask((unsigned)SplitNumElements, -1); | |||
16031 | SmallVector<int, 32> V2BlendMask((unsigned)SplitNumElements, -1); | |||
16032 | SmallVector<int, 32> BlendMask((unsigned)SplitNumElements, -1); | |||
16033 | for (int i = 0; i < SplitNumElements; ++i) { | |||
16034 | int M = HalfMask[i]; | |||
16035 | if (M >= NumElements) { | |||
16036 | if (M >= NumElements + SplitNumElements) | |||
16037 | UseHiV2 = true; | |||
16038 | else | |||
16039 | UseLoV2 = true; | |||
16040 | V2BlendMask[i] = M - NumElements; | |||
16041 | BlendMask[i] = SplitNumElements + i; | |||
16042 | } else if (M >= 0) { | |||
16043 | if (M >= SplitNumElements) | |||
16044 | UseHiV1 = true; | |||
16045 | else | |||
16046 | UseLoV1 = true; | |||
16047 | V1BlendMask[i] = M; | |||
16048 | BlendMask[i] = i; | |||
16049 | } | |||
16050 | } | |||
16051 | ||||
16052 | // Because the lowering happens after all combining takes place, we need to | |||
16053 | // manually combine these blend masks as much as possible so that we create | |||
16054 | // a minimal number of high-level vector shuffle nodes. | |||
16055 | ||||
16056 | // First try just blending the halves of V1 or V2. | |||
16057 | if (!UseLoV1 && !UseHiV1 && !UseLoV2 && !UseHiV2) | |||
16058 | return DAG.getUNDEF(SplitVT); | |||
16059 | if (!UseLoV2 && !UseHiV2) | |||
16060 | return DAG.getVectorShuffle(SplitVT, DL, LoV1, HiV1, V1BlendMask); | |||
16061 | if (!UseLoV1 && !UseHiV1) | |||
16062 | return DAG.getVectorShuffle(SplitVT, DL, LoV2, HiV2, V2BlendMask); | |||
16063 | ||||
16064 | SDValue V1Blend, V2Blend; | |||
16065 | if (UseLoV1 && UseHiV1) { | |||
16066 | V1Blend = | |||
16067 | DAG.getVectorShuffle(SplitVT, DL, LoV1, HiV1, V1BlendMask); | |||
16068 | } else { | |||
16069 | // We only use half of V1 so map the usage down into the final blend mask. | |||
16070 | V1Blend = UseLoV1 ? LoV1 : HiV1; | |||
16071 | for (int i = 0; i < SplitNumElements; ++i) | |||
16072 | if (BlendMask[i] >= 0 && BlendMask[i] < SplitNumElements) | |||
16073 | BlendMask[i] = V1BlendMask[i] - (UseLoV1 ? 0 : SplitNumElements); | |||
16074 | } | |||
16075 | if (UseLoV2 && UseHiV2) { | |||
16076 | V2Blend = | |||
16077 | DAG.getVectorShuffle(SplitVT, DL, LoV2, HiV2, V2BlendMask); | |||
16078 | } else { | |||
16079 | // We only use half of V2 so map the usage down into the final blend mask. | |||
16080 | V2Blend = UseLoV2 ? LoV2 : HiV2; | |||
16081 | for (int i = 0; i < SplitNumElements; ++i) | |||
16082 | if (BlendMask[i] >= SplitNumElements) | |||
16083 | BlendMask[i] = V2BlendMask[i] + (UseLoV2 ? SplitNumElements : 0); | |||
16084 | } | |||
16085 | return DAG.getVectorShuffle(SplitVT, DL, V1Blend, V2Blend, BlendMask); | |||
16086 | }; | |||
16087 | SDValue Lo = HalfBlend(LoMask); | |||
16088 | SDValue Hi = HalfBlend(HiMask); | |||
16089 | return DAG.getNode(ISD::CONCAT_VECTORS, DL, VT, Lo, Hi); | |||
16090 | } | |||
16091 | ||||
16092 | /// Either split a vector in halves or decompose the shuffles and the | |||
16093 | /// blend/unpack. | |||
16094 | /// | |||
16095 | /// This is provided as a good fallback for many lowerings of non-single-input | |||
16096 | /// shuffles with more than one 128-bit lane. In those cases, we want to select | |||
16097 | /// between splitting the shuffle into 128-bit components and stitching those | |||
16098 | /// back together vs. extracting the single-input shuffles and blending those | |||
16099 | /// results. | |||
16100 | static SDValue lowerShuffleAsSplitOrBlend(const SDLoc &DL, MVT VT, SDValue V1, | |||
16101 | SDValue V2, ArrayRef<int> Mask, | |||
16102 | const X86Subtarget &Subtarget, | |||
16103 | SelectionDAG &DAG) { | |||
16104 | assert(!V2.isUndef() && "This routine must not be used to lower single-input "(static_cast <bool> (!V2.isUndef() && "This routine must not be used to lower single-input " "shuffles as it could then recurse on itself.") ? void (0) : __assert_fail ("!V2.isUndef() && \"This routine must not be used to lower single-input \" \"shuffles as it could then recurse on itself.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 16105, __extension__ __PRETTY_FUNCTION__)) | |||
16105 | "shuffles as it could then recurse on itself.")(static_cast <bool> (!V2.isUndef() && "This routine must not be used to lower single-input " "shuffles as it could then recurse on itself.") ? void (0) : __assert_fail ("!V2.isUndef() && \"This routine must not be used to lower single-input \" \"shuffles as it could then recurse on itself.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 16105, __extension__ __PRETTY_FUNCTION__)); | |||
16106 | int Size = Mask.size(); | |||
16107 | ||||
16108 | // If this can be modeled as a broadcast of two elements followed by a blend, | |||
16109 | // prefer that lowering. This is especially important because broadcasts can | |||
16110 | // often fold with memory operands. | |||
16111 | auto DoBothBroadcast = [&] { | |||
16112 | int V1BroadcastIdx = -1, V2BroadcastIdx = -1; | |||
16113 | for (int M : Mask) | |||
16114 | if (M >= Size) { | |||
16115 | if (V2BroadcastIdx < 0) | |||
16116 | V2BroadcastIdx = M - Size; | |||
16117 | else if (M - Size != V2BroadcastIdx) | |||
16118 | return false; | |||
16119 | } else if (M >= 0) { | |||
16120 | if (V1BroadcastIdx < 0) | |||
16121 | V1BroadcastIdx = M; | |||
16122 | else if (M != V1BroadcastIdx) | |||
16123 | return false; | |||
16124 | } | |||
16125 | return true; | |||
16126 | }; | |||
16127 | if (DoBothBroadcast()) | |||
16128 | return lowerShuffleAsDecomposedShuffleMerge(DL, VT, V1, V2, Mask, Subtarget, | |||
16129 | DAG); | |||
16130 | ||||
16131 | // If the inputs all stem from a single 128-bit lane of each input, then we | |||
16132 | // split them rather than blending because the split will decompose to | |||
16133 | // unusually few instructions. | |||
16134 | int LaneCount = VT.getSizeInBits() / 128; | |||
16135 | int LaneSize = Size / LaneCount; | |||
16136 | SmallBitVector LaneInputs[2]; | |||
16137 | LaneInputs[0].resize(LaneCount, false); | |||
16138 | LaneInputs[1].resize(LaneCount, false); | |||
16139 | for (int i = 0; i < Size; ++i) | |||
16140 | if (Mask[i] >= 0) | |||
16141 | LaneInputs[Mask[i] / Size][(Mask[i] % Size) / LaneSize] = true; | |||
16142 | if (LaneInputs[0].count() <= 1 && LaneInputs[1].count() <= 1) | |||
16143 | return splitAndLowerShuffle(DL, VT, V1, V2, Mask, DAG); | |||
16144 | ||||
16145 | // Otherwise, just fall back to decomposed shuffles and a blend/unpack. This | |||
16146 | // requires that the decomposed single-input shuffles don't end up here. | |||
16147 | return lowerShuffleAsDecomposedShuffleMerge(DL, VT, V1, V2, Mask, Subtarget, | |||
16148 | DAG); | |||
16149 | } | |||
16150 | ||||
16151 | // Lower as SHUFPD(VPERM2F128(V1, V2), VPERM2F128(V1, V2)). | |||
16152 | // TODO: Extend to support v8f32 (+ 512-bit shuffles). | |||
16153 | static SDValue lowerShuffleAsLanePermuteAndSHUFP(const SDLoc &DL, MVT VT, | |||
16154 | SDValue V1, SDValue V2, | |||
16155 | ArrayRef<int> Mask, | |||
16156 | SelectionDAG &DAG) { | |||
16157 | assert(VT == MVT::v4f64 && "Only for v4f64 shuffles")(static_cast <bool> (VT == MVT::v4f64 && "Only for v4f64 shuffles" ) ? void (0) : __assert_fail ("VT == MVT::v4f64 && \"Only for v4f64 shuffles\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 16157, __extension__ __PRETTY_FUNCTION__)); | |||
16158 | ||||
16159 | int LHSMask[4] = {-1, -1, -1, -1}; | |||
16160 | int RHSMask[4] = {-1, -1, -1, -1}; | |||
16161 | unsigned SHUFPMask = 0; | |||
16162 | ||||
16163 | // As SHUFPD uses a single LHS/RHS element per lane, we can always | |||
16164 | // perform the shuffle once the lanes have been shuffled in place. | |||
16165 | for (int i = 0; i != 4; ++i) { | |||
16166 | int M = Mask[i]; | |||
16167 | if (M < 0) | |||
16168 | continue; | |||
16169 | int LaneBase = i & ~1; | |||
16170 | auto &LaneMask = (i & 1) ? RHSMask : LHSMask; | |||
16171 | LaneMask[LaneBase + (M & 1)] = M; | |||
16172 | SHUFPMask |= (M & 1) << i; | |||
16173 | } | |||
16174 | ||||
16175 | SDValue LHS = DAG.getVectorShuffle(VT, DL, V1, V2, LHSMask); | |||
16176 | SDValue RHS = DAG.getVectorShuffle(VT, DL, V1, V2, RHSMask); | |||
16177 | return DAG.getNode(X86ISD::SHUFP, DL, VT, LHS, RHS, | |||
16178 | DAG.getTargetConstant(SHUFPMask, DL, MVT::i8)); | |||
16179 | } | |||
16180 | ||||
16181 | /// Lower a vector shuffle crossing multiple 128-bit lanes as | |||
16182 | /// a lane permutation followed by a per-lane permutation. | |||
16183 | /// | |||
16184 | /// This is mainly for cases where we can have non-repeating permutes | |||
16185 | /// in each lane. | |||
16186 | /// | |||
16187 | /// TODO: This is very similar to lowerShuffleAsLanePermuteAndRepeatedMask, | |||
16188 | /// we should investigate merging them. | |||
16189 | static SDValue lowerShuffleAsLanePermuteAndPermute( | |||
16190 | const SDLoc &DL, MVT VT, SDValue V1, SDValue V2, ArrayRef<int> Mask, | |||
16191 | SelectionDAG &DAG, const X86Subtarget &Subtarget) { | |||
16192 | int NumElts = VT.getVectorNumElements(); | |||
16193 | int NumLanes = VT.getSizeInBits() / 128; | |||
16194 | int NumEltsPerLane = NumElts / NumLanes; | |||
16195 | bool CanUseSublanes = Subtarget.hasAVX2() && V2.isUndef(); | |||
16196 | ||||
16197 | /// Attempts to find a sublane permute with the given size | |||
16198 | /// that gets all elements into their target lanes. | |||
16199 | /// | |||
16200 | /// If successful, fills CrossLaneMask and InLaneMask and returns true. | |||
16201 | /// If unsuccessful, returns false and may overwrite InLaneMask. | |||
16202 | auto getSublanePermute = [&](int NumSublanes) -> SDValue { | |||
16203 | int NumSublanesPerLane = NumSublanes / NumLanes; | |||
16204 | int NumEltsPerSublane = NumElts / NumSublanes; | |||
16205 | ||||
16206 | SmallVector<int, 16> CrossLaneMask; | |||
16207 | SmallVector<int, 16> InLaneMask(NumElts, SM_SentinelUndef); | |||
16208 | // CrossLaneMask but one entry == one sublane. | |||
16209 | SmallVector<int, 16> CrossLaneMaskLarge(NumSublanes, SM_SentinelUndef); | |||
16210 | ||||
16211 | for (int i = 0; i != NumElts; ++i) { | |||
16212 | int M = Mask[i]; | |||
16213 | if (M < 0) | |||
16214 | continue; | |||
16215 | ||||
16216 | int SrcSublane = M / NumEltsPerSublane; | |||
16217 | int DstLane = i / NumEltsPerLane; | |||
16218 | ||||
16219 | // We only need to get the elements into the right lane, not sublane. | |||
16220 | // So search all sublanes that make up the destination lane. | |||
16221 | bool Found = false; | |||
16222 | int DstSubStart = DstLane * NumSublanesPerLane; | |||
16223 | int DstSubEnd = DstSubStart + NumSublanesPerLane; | |||
16224 | for (int DstSublane = DstSubStart; DstSublane < DstSubEnd; ++DstSublane) { | |||
16225 | if (!isUndefOrEqual(CrossLaneMaskLarge[DstSublane], SrcSublane)) | |||
16226 | continue; | |||
16227 | ||||
16228 | Found = true; | |||
16229 | CrossLaneMaskLarge[DstSublane] = SrcSublane; | |||
16230 | int DstSublaneOffset = DstSublane * NumEltsPerSublane; | |||
16231 | InLaneMask[i] = DstSublaneOffset + M % NumEltsPerSublane; | |||
16232 | break; | |||
16233 | } | |||
16234 | if (!Found) | |||
16235 | return SDValue(); | |||
16236 | } | |||
16237 | ||||
16238 | // Fill CrossLaneMask using CrossLaneMaskLarge. | |||
16239 | narrowShuffleMaskElts(NumEltsPerSublane, CrossLaneMaskLarge, CrossLaneMask); | |||
16240 | ||||
16241 | if (!CanUseSublanes) { | |||
16242 | // If we're only shuffling a single lowest lane and the rest are identity | |||
16243 | // then don't bother. | |||
16244 | // TODO - isShuffleMaskInputInPlace could be extended to something like | |||
16245 | // this. | |||
16246 | int NumIdentityLanes = 0; | |||
16247 | bool OnlyShuffleLowestLane = true; | |||
16248 | for (int i = 0; i != NumLanes; ++i) { | |||
16249 | int LaneOffset = i * NumEltsPerLane; | |||
16250 | if (isSequentialOrUndefInRange(InLaneMask, LaneOffset, NumEltsPerLane, | |||
16251 | i * NumEltsPerLane)) | |||
16252 | NumIdentityLanes++; | |||
16253 | else if (CrossLaneMask[LaneOffset] != 0) | |||
16254 | OnlyShuffleLowestLane = false; | |||
16255 | } | |||
16256 | if (OnlyShuffleLowestLane && NumIdentityLanes == (NumLanes - 1)) | |||
16257 | return SDValue(); | |||
16258 | } | |||
16259 | ||||
16260 | SDValue CrossLane = DAG.getVectorShuffle(VT, DL, V1, V2, CrossLaneMask); | |||
16261 | return DAG.getVectorShuffle(VT, DL, CrossLane, DAG.getUNDEF(VT), | |||
16262 | InLaneMask); | |||
16263 | }; | |||
16264 | ||||
16265 | // First attempt a solution with full lanes. | |||
16266 | if (SDValue V = getSublanePermute(/*NumSublanes=*/NumLanes)) | |||
16267 | return V; | |||
16268 | ||||
16269 | // The rest of the solutions use sublanes. | |||
16270 | if (!CanUseSublanes) | |||
16271 | return SDValue(); | |||
16272 | ||||
16273 | // Then attempt a solution with 64-bit sublanes (vpermq). | |||
16274 | if (SDValue V = getSublanePermute(/*NumSublanes=*/NumLanes * 2)) | |||
16275 | return V; | |||
16276 | ||||
16277 | // If that doesn't work and we have fast variable cross-lane shuffle, | |||
16278 | // attempt 32-bit sublanes (vpermd). | |||
16279 | if (!Subtarget.hasFastVariableCrossLaneShuffle()) | |||
16280 | return SDValue(); | |||
16281 | ||||
16282 | return getSublanePermute(/*NumSublanes=*/NumLanes * 4); | |||
16283 | } | |||
16284 | ||||
16285 | /// Lower a vector shuffle crossing multiple 128-bit lanes by shuffling one | |||
16286 | /// source with a lane permutation. | |||
16287 | /// | |||
16288 | /// This lowering strategy results in four instructions in the worst case for a | |||
16289 | /// single-input cross lane shuffle which is lower than any other fully general | |||
16290 | /// cross-lane shuffle strategy I'm aware of. Special cases for each particular | |||
16291 | /// shuffle pattern should be handled prior to trying this lowering. | |||
16292 | static SDValue lowerShuffleAsLanePermuteAndShuffle( | |||
16293 | const SDLoc &DL, MVT VT, SDValue V1, SDValue V2, ArrayRef<int> Mask, | |||
16294 | SelectionDAG &DAG, const X86Subtarget &Subtarget) { | |||
16295 | // FIXME: This should probably be generalized for 512-bit vectors as well. | |||
16296 | assert(VT.is256BitVector() && "Only for 256-bit vector shuffles!")(static_cast <bool> (VT.is256BitVector() && "Only for 256-bit vector shuffles!" ) ? void (0) : __assert_fail ("VT.is256BitVector() && \"Only for 256-bit vector shuffles!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 16296, __extension__ __PRETTY_FUNCTION__)); | |||
16297 | int Size = Mask.size(); | |||
16298 | int LaneSize = Size / 2; | |||
16299 | ||||
16300 | // Fold to SHUFPD(VPERM2F128(V1, V2), VPERM2F128(V1, V2)). | |||
16301 | // Only do this if the elements aren't all from the lower lane, | |||
16302 | // otherwise we're (probably) better off doing a split. | |||
16303 | if (VT == MVT::v4f64 && | |||
16304 | !all_of(Mask, [LaneSize](int M) { return M < LaneSize; })) | |||
16305 | if (SDValue V = | |||
16306 | lowerShuffleAsLanePermuteAndSHUFP(DL, VT, V1, V2, Mask, DAG)) | |||
16307 | return V; | |||
16308 | ||||
16309 | // If there are only inputs from one 128-bit lane, splitting will in fact be | |||
16310 | // less expensive. The flags track whether the given lane contains an element | |||
16311 | // that crosses to another lane. | |||
16312 | if (!Subtarget.hasAVX2()) { | |||
16313 | bool LaneCrossing[2] = {false, false}; | |||
16314 | for (int i = 0; i < Size; ++i) | |||
16315 | if (Mask[i] >= 0 && ((Mask[i] % Size) / LaneSize) != (i / LaneSize)) | |||
16316 | LaneCrossing[(Mask[i] % Size) / LaneSize] = true; | |||
16317 | if (!LaneCrossing[0] || !LaneCrossing[1]) | |||
16318 | return splitAndLowerShuffle(DL, VT, V1, V2, Mask, DAG); | |||
16319 | } else { | |||
16320 | bool LaneUsed[2] = {false, false}; | |||
16321 | for (int i = 0; i < Size; ++i) | |||
16322 | if (Mask[i] >= 0) | |||
16323 | LaneUsed[(Mask[i] % Size) / LaneSize] = true; | |||
16324 | if (!LaneUsed[0] || !LaneUsed[1]) | |||
16325 | return splitAndLowerShuffle(DL, VT, V1, V2, Mask, DAG); | |||
16326 | } | |||
16327 | ||||
16328 | // TODO - we could support shuffling V2 in the Flipped input. | |||
16329 | assert(V2.isUndef() &&(static_cast <bool> (V2.isUndef() && "This last part of this routine only works on single input shuffles" ) ? void (0) : __assert_fail ("V2.isUndef() && \"This last part of this routine only works on single input shuffles\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 16330, __extension__ __PRETTY_FUNCTION__)) | |||
16330 | "This last part of this routine only works on single input shuffles")(static_cast <bool> (V2.isUndef() && "This last part of this routine only works on single input shuffles" ) ? void (0) : __assert_fail ("V2.isUndef() && \"This last part of this routine only works on single input shuffles\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 16330, __extension__ __PRETTY_FUNCTION__)); | |||
16331 | ||||
16332 | SmallVector<int, 32> InLaneMask(Mask.begin(), Mask.end()); | |||
16333 | for (int i = 0; i < Size; ++i) { | |||
16334 | int &M = InLaneMask[i]; | |||
16335 | if (M < 0) | |||
16336 | continue; | |||
16337 | if (((M % Size) / LaneSize) != (i / LaneSize)) | |||
| ||||
16338 | M = (M % LaneSize) + ((i / LaneSize) * LaneSize) + Size; | |||
16339 | } | |||
16340 | assert(!is128BitLaneCrossingShuffleMask(VT, InLaneMask) &&(static_cast <bool> (!is128BitLaneCrossingShuffleMask(VT , InLaneMask) && "In-lane shuffle mask expected") ? void (0) : __assert_fail ("!is128BitLaneCrossingShuffleMask(VT, InLaneMask) && \"In-lane shuffle mask expected\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 16341, __extension__ __PRETTY_FUNCTION__)) | |||
16341 | "In-lane shuffle mask expected")(static_cast <bool> (!is128BitLaneCrossingShuffleMask(VT , InLaneMask) && "In-lane shuffle mask expected") ? void (0) : __assert_fail ("!is128BitLaneCrossingShuffleMask(VT, InLaneMask) && \"In-lane shuffle mask expected\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 16341, __extension__ __PRETTY_FUNCTION__)); | |||
16342 | ||||
16343 | // Flip the lanes, and shuffle the results which should now be in-lane. | |||
16344 | MVT PVT = VT.isFloatingPoint() ? MVT::v4f64 : MVT::v4i64; | |||
16345 | SDValue Flipped = DAG.getBitcast(PVT, V1); | |||
16346 | Flipped = | |||
16347 | DAG.getVectorShuffle(PVT, DL, Flipped, DAG.getUNDEF(PVT), {2, 3, 0, 1}); | |||
16348 | Flipped = DAG.getBitcast(VT, Flipped); | |||
16349 | return DAG.getVectorShuffle(VT, DL, V1, Flipped, InLaneMask); | |||
16350 | } | |||
16351 | ||||
16352 | /// Handle lowering 2-lane 128-bit shuffles. | |||
16353 | static SDValue lowerV2X128Shuffle(const SDLoc &DL, MVT VT, SDValue V1, | |||
16354 | SDValue V2, ArrayRef<int> Mask, | |||
16355 | const APInt &Zeroable, | |||
16356 | const X86Subtarget &Subtarget, | |||
16357 | SelectionDAG &DAG) { | |||
16358 | if (V2.isUndef()) { | |||
16359 | // Attempt to match VBROADCAST*128 subvector broadcast load. | |||
16360 | bool SplatLo = isShuffleEquivalent(Mask, {0, 1, 0, 1}, V1); | |||
16361 | bool SplatHi = isShuffleEquivalent(Mask, {2, 3, 2, 3}, V1); | |||
16362 | if ((SplatLo || SplatHi) && !Subtarget.hasAVX512() && V1.hasOneUse() && | |||
16363 | MayFoldLoad(peekThroughOneUseBitcasts(V1))) { | |||
16364 | auto *Ld = cast<LoadSDNode>(peekThroughOneUseBitcasts(V1)); | |||
16365 | if (!Ld->isNonTemporal()) { | |||
16366 | MVT MemVT = VT.getHalfNumVectorElementsVT(); | |||
16367 | unsigned Ofs = SplatLo ? 0 : MemVT.getStoreSize(); | |||
16368 | SDVTList Tys = DAG.getVTList(VT, MVT::Other); | |||
16369 | SDValue Ptr = DAG.getMemBasePlusOffset(Ld->getBasePtr(), | |||
16370 | TypeSize::Fixed(Ofs), DL); | |||
16371 | SDValue Ops[] = {Ld->getChain(), Ptr}; | |||
16372 | SDValue BcastLd = DAG.getMemIntrinsicNode( | |||
16373 | X86ISD::SUBV_BROADCAST_LOAD, DL, Tys, Ops, MemVT, | |||
16374 | DAG.getMachineFunction().getMachineMemOperand( | |||
16375 | Ld->getMemOperand(), Ofs, MemVT.getStoreSize())); | |||
16376 | DAG.ReplaceAllUsesOfValueWith(SDValue(Ld, 1), BcastLd.getValue(1)); | |||
16377 | return BcastLd; | |||
16378 | } | |||
16379 | } | |||
16380 | ||||
16381 | // With AVX2, use VPERMQ/VPERMPD for unary shuffles to allow memory folding. | |||
16382 | if (Subtarget.hasAVX2()) | |||
16383 | return SDValue(); | |||
16384 | } | |||
16385 | ||||
16386 | bool V2IsZero = !V2.isUndef() && ISD::isBuildVectorAllZeros(V2.getNode()); | |||
16387 | ||||
16388 | SmallVector<int, 4> WidenedMask; | |||
16389 | if (!canWidenShuffleElements(Mask, Zeroable, V2IsZero, WidenedMask)) | |||
16390 | return SDValue(); | |||
16391 | ||||
16392 | bool IsLowZero = (Zeroable & 0x3) == 0x3; | |||
16393 | bool IsHighZero = (Zeroable & 0xc) == 0xc; | |||
16394 | ||||
16395 | // Try to use an insert into a zero vector. | |||
16396 | if (WidenedMask[0] == 0 && IsHighZero) { | |||
16397 | MVT SubVT = MVT::getVectorVT(VT.getVectorElementType(), 2); | |||
16398 | SDValue LoV = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, SubVT, V1, | |||
16399 | DAG.getIntPtrConstant(0, DL)); | |||
16400 | return DAG.getNode(ISD::INSERT_SUBVECTOR, DL, VT, | |||
16401 | getZeroVector(VT, Subtarget, DAG, DL), LoV, | |||
16402 | DAG.getIntPtrConstant(0, DL)); | |||
16403 | } | |||
16404 | ||||
16405 | // TODO: If minimizing size and one of the inputs is a zero vector and the | |||
16406 | // the zero vector has only one use, we could use a VPERM2X128 to save the | |||
16407 | // instruction bytes needed to explicitly generate the zero vector. | |||
16408 | ||||
16409 | // Blends are faster and handle all the non-lane-crossing cases. | |||
16410 | if (SDValue Blend = lowerShuffleAsBlend(DL, VT, V1, V2, Mask, Zeroable, | |||
16411 | Subtarget, DAG)) | |||
16412 | return Blend; | |||
16413 | ||||
16414 | // If either input operand is a zero vector, use VPERM2X128 because its mask | |||
16415 | // allows us to replace the zero input with an implicit zero. | |||
16416 | if (!IsLowZero && !IsHighZero) { | |||
16417 | // Check for patterns which can be matched with a single insert of a 128-bit | |||
16418 | // subvector. | |||
16419 | bool OnlyUsesV1 = isShuffleEquivalent(Mask, {0, 1, 0, 1}, V1, V2); | |||
16420 | if (OnlyUsesV1 || isShuffleEquivalent(Mask, {0, 1, 4, 5}, V1, V2)) { | |||
16421 | ||||
16422 | // With AVX1, use vperm2f128 (below) to allow load folding. Otherwise, | |||
16423 | // this will likely become vinsertf128 which can't fold a 256-bit memop. | |||
16424 | if (!isa<LoadSDNode>(peekThroughBitcasts(V1))) { | |||
16425 | MVT SubVT = MVT::getVectorVT(VT.getVectorElementType(), 2); | |||
16426 | SDValue SubVec = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, SubVT, | |||
16427 | OnlyUsesV1 ? V1 : V2, | |||
16428 | DAG.getIntPtrConstant(0, DL)); | |||
16429 | return DAG.getNode(ISD::INSERT_SUBVECTOR, DL, VT, V1, SubVec, | |||
16430 | DAG.getIntPtrConstant(2, DL)); | |||
16431 | } | |||
16432 | } | |||
16433 | ||||
16434 | // Try to use SHUF128 if possible. | |||
16435 | if (Subtarget.hasVLX()) { | |||
16436 | if (WidenedMask[0] < 2 && WidenedMask[1] >= 2) { | |||
16437 | unsigned PermMask = ((WidenedMask[0] % 2) << 0) | | |||
16438 | ((WidenedMask[1] % 2) << 1); | |||
16439 | return DAG.getNode(X86ISD::SHUF128, DL, VT, V1, V2, | |||
16440 | DAG.getTargetConstant(PermMask, DL, MVT::i8)); | |||
16441 | } | |||
16442 | } | |||
16443 | } | |||
16444 | ||||
16445 | // Otherwise form a 128-bit permutation. After accounting for undefs, | |||
16446 | // convert the 64-bit shuffle mask selection values into 128-bit | |||
16447 | // selection bits by dividing the indexes by 2 and shifting into positions | |||
16448 | // defined by a vperm2*128 instruction's immediate control byte. | |||
16449 | ||||
16450 | // The immediate permute control byte looks like this: | |||
16451 | // [1:0] - select 128 bits from sources for low half of destination | |||
16452 | // [2] - ignore | |||
16453 | // [3] - zero low half of destination | |||
16454 | // [5:4] - select 128 bits from sources for high half of destination | |||
16455 | // [6] - ignore | |||
16456 | // [7] - zero high half of destination | |||
16457 | ||||
16458 | assert((WidenedMask[0] >= 0 || IsLowZero) &&(static_cast <bool> ((WidenedMask[0] >= 0 || IsLowZero ) && (WidenedMask[1] >= 0 || IsHighZero) && "Undef half?") ? void (0) : __assert_fail ("(WidenedMask[0] >= 0 || IsLowZero) && (WidenedMask[1] >= 0 || IsHighZero) && \"Undef half?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 16459, __extension__ __PRETTY_FUNCTION__)) | |||
16459 | (WidenedMask[1] >= 0 || IsHighZero) && "Undef half?")(static_cast <bool> ((WidenedMask[0] >= 0 || IsLowZero ) && (WidenedMask[1] >= 0 || IsHighZero) && "Undef half?") ? void (0) : __assert_fail ("(WidenedMask[0] >= 0 || IsLowZero) && (WidenedMask[1] >= 0 || IsHighZero) && \"Undef half?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 16459, __extension__ __PRETTY_FUNCTION__)); | |||
16460 | ||||
16461 | unsigned PermMask = 0; | |||
16462 | PermMask |= IsLowZero ? 0x08 : (WidenedMask[0] << 0); | |||
16463 | PermMask |= IsHighZero ? 0x80 : (WidenedMask[1] << 4); | |||
16464 | ||||
16465 | // Check the immediate mask and replace unused sources with undef. | |||
16466 | if ((PermMask & 0x0a) != 0x00 && (PermMask & 0xa0) != 0x00) | |||
16467 | V1 = DAG.getUNDEF(VT); | |||
16468 | if ((PermMask & 0x0a) != 0x02 && (PermMask & 0xa0) != 0x20) | |||
16469 | V2 = DAG.getUNDEF(VT); | |||
16470 | ||||
16471 | return DAG.getNode(X86ISD::VPERM2X128, DL, VT, V1, V2, | |||
16472 | DAG.getTargetConstant(PermMask, DL, MVT::i8)); | |||
16473 | } | |||
16474 | ||||
16475 | /// Lower a vector shuffle by first fixing the 128-bit lanes and then | |||
16476 | /// shuffling each lane. | |||
16477 | /// | |||
16478 | /// This attempts to create a repeated lane shuffle where each lane uses one | |||
16479 | /// or two of the lanes of the inputs. The lanes of the input vectors are | |||
16480 | /// shuffled in one or two independent shuffles to get the lanes into the | |||
16481 | /// position needed by the final shuffle. | |||
16482 | static SDValue lowerShuffleAsLanePermuteAndRepeatedMask( | |||
16483 | const SDLoc &DL, MVT VT, SDValue V1, SDValue V2, ArrayRef<int> Mask, | |||
16484 | const X86Subtarget &Subtarget, SelectionDAG &DAG) { | |||
16485 | assert(!V2.isUndef() && "This is only useful with multiple inputs.")(static_cast <bool> (!V2.isUndef() && "This is only useful with multiple inputs." ) ? void (0) : __assert_fail ("!V2.isUndef() && \"This is only useful with multiple inputs.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 16485, __extension__ __PRETTY_FUNCTION__)); | |||
16486 | ||||
16487 | if (is128BitLaneRepeatedShuffleMask(VT, Mask)) | |||
16488 | return SDValue(); | |||
16489 | ||||
16490 | int NumElts = Mask.size(); | |||
16491 | int NumLanes = VT.getSizeInBits() / 128; | |||
16492 | int NumLaneElts = 128 / VT.getScalarSizeInBits(); | |||
16493 | SmallVector<int, 16> RepeatMask(NumLaneElts, -1); | |||
16494 | SmallVector<std::array<int, 2>, 2> LaneSrcs(NumLanes, {{-1, -1}}); | |||
16495 | ||||
16496 | // First pass will try to fill in the RepeatMask from lanes that need two | |||
16497 | // sources. | |||
16498 | for (int Lane = 0; Lane != NumLanes; ++Lane) { | |||
16499 | int Srcs[2] = {-1, -1}; | |||
16500 | SmallVector<int, 16> InLaneMask(NumLaneElts, -1); | |||
16501 | for (int i = 0; i != NumLaneElts; ++i) { | |||
16502 | int M = Mask[(Lane * NumLaneElts) + i]; | |||
16503 | if (M < 0) | |||
16504 | continue; | |||
16505 | // Determine which of the possible input lanes (NumLanes from each source) | |||
16506 | // this element comes from. Assign that as one of the sources for this | |||
16507 | // lane. We can assign up to 2 sources for this lane. If we run out | |||
16508 | // sources we can't do anything. | |||
16509 | int LaneSrc = M / NumLaneElts; | |||
16510 | int Src; | |||
16511 | if (Srcs[0] < 0 || Srcs[0] == LaneSrc) | |||
16512 | Src = 0; | |||
16513 | else if (Srcs[1] < 0 || Srcs[1] == LaneSrc) | |||
16514 | Src = 1; | |||
16515 | else | |||
16516 | return SDValue(); | |||
16517 | ||||
16518 | Srcs[Src] = LaneSrc; | |||
16519 | InLaneMask[i] = (M % NumLaneElts) + Src * NumElts; | |||
16520 | } | |||
16521 | ||||
16522 | // If this lane has two sources, see if it fits with the repeat mask so far. | |||
16523 | if (Srcs[1] < 0) | |||
16524 | continue; | |||
16525 | ||||
16526 | LaneSrcs[Lane][0] = Srcs[0]; | |||
16527 | LaneSrcs[Lane][1] = Srcs[1]; | |||
16528 | ||||
16529 | auto MatchMasks = [](ArrayRef<int> M1, ArrayRef<int> M2) { | |||
16530 | assert(M1.size() == M2.size() && "Unexpected mask size")(static_cast <bool> (M1.size() == M2.size() && "Unexpected mask size" ) ? void (0) : __assert_fail ("M1.size() == M2.size() && \"Unexpected mask size\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 16530, __extension__ __PRETTY_FUNCTION__)); | |||
16531 | for (int i = 0, e = M1.size(); i != e; ++i) | |||
16532 | if (M1[i] >= 0 && M2[i] >= 0 && M1[i] != M2[i]) | |||
16533 | return false; | |||
16534 | return true; | |||
16535 | }; | |||
16536 | ||||
16537 | auto MergeMasks = [](ArrayRef<int> Mask, MutableArrayRef<int> MergedMask) { | |||
16538 | assert(Mask.size() == MergedMask.size() && "Unexpected mask size")(static_cast <bool> (Mask.size() == MergedMask.size() && "Unexpected mask size") ? void (0) : __assert_fail ("Mask.size() == MergedMask.size() && \"Unexpected mask size\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 16538, __extension__ __PRETTY_FUNCTION__)); | |||
16539 | for (int i = 0, e = MergedMask.size(); i != e; ++i) { | |||
16540 | int M = Mask[i]; | |||
16541 | if (M < 0) | |||
16542 | continue; | |||
16543 | assert((MergedMask[i] < 0 || MergedMask[i] == M) &&(static_cast <bool> ((MergedMask[i] < 0 || MergedMask [i] == M) && "Unexpected mask element") ? void (0) : __assert_fail ("(MergedMask[i] < 0 || MergedMask[i] == M) && \"Unexpected mask element\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 16544, __extension__ __PRETTY_FUNCTION__)) | |||
16544 | "Unexpected mask element")(static_cast <bool> ((MergedMask[i] < 0 || MergedMask [i] == M) && "Unexpected mask element") ? void (0) : __assert_fail ("(MergedMask[i] < 0 || MergedMask[i] == M) && \"Unexpected mask element\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 16544, __extension__ __PRETTY_FUNCTION__)); | |||
16545 | MergedMask[i] = M; | |||
16546 | } | |||
16547 | }; | |||
16548 | ||||
16549 | if (MatchMasks(InLaneMask, RepeatMask)) { | |||
16550 | // Merge this lane mask into the final repeat mask. | |||
16551 | MergeMasks(InLaneMask, RepeatMask); | |||
16552 | continue; | |||
16553 | } | |||
16554 | ||||
16555 | // Didn't find a match. Swap the operands and try again. | |||
16556 | std::swap(LaneSrcs[Lane][0], LaneSrcs[Lane][1]); | |||
16557 | ShuffleVectorSDNode::commuteMask(InLaneMask); | |||
16558 | ||||
16559 | if (MatchMasks(InLaneMask, RepeatMask)) { | |||
16560 | // Merge this lane mask into the final repeat mask. | |||
16561 | MergeMasks(InLaneMask, RepeatMask); | |||
16562 | continue; | |||
16563 | } | |||
16564 | ||||
16565 | // Couldn't find a match with the operands in either order. | |||
16566 | return SDValue(); | |||
16567 | } | |||
16568 | ||||
16569 | // Now handle any lanes with only one source. | |||
16570 | for (int Lane = 0; Lane != NumLanes; ++Lane) { | |||
16571 | // If this lane has already been processed, skip it. | |||
16572 | if (LaneSrcs[Lane][0] >= 0) | |||
16573 | continue; | |||
16574 | ||||
16575 | for (int i = 0; i != NumLaneElts; ++i) { | |||
16576 | int M = Mask[(Lane * NumLaneElts) + i]; | |||
16577 | if (M < 0) | |||
16578 | continue; | |||
16579 | ||||
16580 | // If RepeatMask isn't defined yet we can define it ourself. | |||
16581 | if (RepeatMask[i] < 0) | |||
16582 | RepeatMask[i] = M % NumLaneElts; | |||
16583 | ||||
16584 | if (RepeatMask[i] < NumElts) { | |||
16585 | if (RepeatMask[i] != M % NumLaneElts) | |||
16586 | return SDValue(); | |||
16587 | LaneSrcs[Lane][0] = M / NumLaneElts; | |||
16588 | } else { | |||
16589 | if (RepeatMask[i] != ((M % NumLaneElts) + NumElts)) | |||
16590 | return SDValue(); | |||
16591 | LaneSrcs[Lane][1] = M / NumLaneElts; | |||
16592 | } | |||
16593 | } | |||
16594 | ||||
16595 | if (LaneSrcs[Lane][0] < 0 && LaneSrcs[Lane][1] < 0) | |||
16596 | return SDValue(); | |||
16597 | } | |||
16598 | ||||
16599 | SmallVector<int, 16> NewMask(NumElts, -1); | |||
16600 | for (int Lane = 0; Lane != NumLanes; ++Lane) { | |||
16601 | int Src = LaneSrcs[Lane][0]; | |||
16602 | for (int i = 0; i != NumLaneElts; ++i) { | |||
16603 | int M = -1; | |||
16604 | if (Src >= 0) | |||
16605 | M = Src * NumLaneElts + i; | |||
16606 | NewMask[Lane * NumLaneElts + i] = M; | |||
16607 | } | |||
16608 | } | |||
16609 | SDValue NewV1 = DAG.getVectorShuffle(VT, DL, V1, V2, NewMask); | |||
16610 | // Ensure we didn't get back the shuffle we started with. | |||
16611 | // FIXME: This is a hack to make up for some splat handling code in | |||
16612 | // getVectorShuffle. | |||
16613 | if (isa<ShuffleVectorSDNode>(NewV1) && | |||
16614 | cast<ShuffleVectorSDNode>(NewV1)->getMask() == Mask) | |||
16615 | return SDValue(); | |||
16616 | ||||
16617 | for (int Lane = 0; Lane != NumLanes; ++Lane) { | |||
16618 | int Src = LaneSrcs[Lane][1]; | |||
16619 | for (int i = 0; i != NumLaneElts; ++i) { | |||
16620 | int M = -1; | |||
16621 | if (Src >= 0) | |||
16622 | M = Src * NumLaneElts + i; | |||
16623 | NewMask[Lane * NumLaneElts + i] = M; | |||
16624 | } | |||
16625 | } | |||
16626 | SDValue NewV2 = DAG.getVectorShuffle(VT, DL, V1, V2, NewMask); | |||
16627 | // Ensure we didn't get back the shuffle we started with. | |||
16628 | // FIXME: This is a hack to make up for some splat handling code in | |||
16629 | // getVectorShuffle. | |||
16630 | if (isa<ShuffleVectorSDNode>(NewV2) && | |||
16631 | cast<ShuffleVectorSDNode>(NewV2)->getMask() == Mask) | |||
16632 | return SDValue(); | |||
16633 | ||||
16634 | for (int i = 0; i != NumElts; ++i) { | |||
16635 | NewMask[i] = RepeatMask[i % NumLaneElts]; | |||
16636 | if (NewMask[i] < 0) | |||
16637 | continue; | |||
16638 | ||||
16639 | NewMask[i] += (i / NumLaneElts) * NumLaneElts; | |||
16640 | } | |||
16641 | return DAG.getVectorShuffle(VT, DL, NewV1, NewV2, NewMask); | |||
16642 | } | |||
16643 | ||||
16644 | /// If the input shuffle mask results in a vector that is undefined in all upper | |||
16645 | /// or lower half elements and that mask accesses only 2 halves of the | |||
16646 | /// shuffle's operands, return true. A mask of half the width with mask indexes | |||
16647 | /// adjusted to access the extracted halves of the original shuffle operands is | |||
16648 | /// returned in HalfMask. HalfIdx1 and HalfIdx2 return whether the upper or | |||
16649 | /// lower half of each input operand is accessed. | |||
16650 | static bool | |||
16651 | getHalfShuffleMask(ArrayRef<int> Mask, MutableArrayRef<int> HalfMask, | |||
16652 | int &HalfIdx1, int &HalfIdx2) { | |||
16653 | assert((Mask.size() == HalfMask.size() * 2) &&(static_cast <bool> ((Mask.size() == HalfMask.size() * 2 ) && "Expected input mask to be twice as long as output" ) ? void (0) : __assert_fail ("(Mask.size() == HalfMask.size() * 2) && \"Expected input mask to be twice as long as output\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 16654, __extension__ __PRETTY_FUNCTION__)) | |||
16654 | "Expected input mask to be twice as long as output")(static_cast <bool> ((Mask.size() == HalfMask.size() * 2 ) && "Expected input mask to be twice as long as output" ) ? void (0) : __assert_fail ("(Mask.size() == HalfMask.size() * 2) && \"Expected input mask to be twice as long as output\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 16654, __extension__ __PRETTY_FUNCTION__)); | |||
16655 | ||||
16656 | // Exactly one half of the result must be undef to allow narrowing. | |||
16657 | bool UndefLower = isUndefLowerHalf(Mask); | |||
16658 | bool UndefUpper = isUndefUpperHalf(Mask); | |||
16659 | if (UndefLower == UndefUpper) | |||
16660 | return false; | |||
16661 | ||||
16662 | unsigned HalfNumElts = HalfMask.size(); | |||
16663 | unsigned MaskIndexOffset = UndefLower ? HalfNumElts : 0; | |||
16664 | HalfIdx1 = -1; | |||
16665 | HalfIdx2 = -1; | |||
16666 | for (unsigned i = 0; i != HalfNumElts; ++i) { | |||
16667 | int M = Mask[i + MaskIndexOffset]; | |||
16668 | if (M < 0) { | |||
16669 | HalfMask[i] = M; | |||
16670 | continue; | |||
16671 | } | |||
16672 | ||||
16673 | // Determine which of the 4 half vectors this element is from. | |||
16674 | // i.e. 0 = Lower V1, 1 = Upper V1, 2 = Lower V2, 3 = Upper V2. | |||
16675 | int HalfIdx = M / HalfNumElts; | |||
16676 | ||||
16677 | // Determine the element index into its half vector source. | |||
16678 | int HalfElt = M % HalfNumElts; | |||
16679 | ||||
16680 | // We can shuffle with up to 2 half vectors, set the new 'half' | |||
16681 | // shuffle mask accordingly. | |||
16682 | if (HalfIdx1 < 0 || HalfIdx1 == HalfIdx) { | |||
16683 | HalfMask[i] = HalfElt; | |||
16684 | HalfIdx1 = HalfIdx; | |||
16685 | continue; | |||
16686 | } | |||
16687 | if (HalfIdx2 < 0 || HalfIdx2 == HalfIdx) { | |||
16688 | HalfMask[i] = HalfElt + HalfNumElts; | |||
16689 | HalfIdx2 = HalfIdx; | |||
16690 | continue; | |||
16691 | } | |||
16692 | ||||
16693 | // Too many half vectors referenced. | |||
16694 | return false; | |||
16695 | } | |||
16696 | ||||
16697 | return true; | |||
16698 | } | |||
16699 | ||||
16700 | /// Given the output values from getHalfShuffleMask(), create a half width | |||
16701 | /// shuffle of extracted vectors followed by an insert back to full width. | |||
16702 | static SDValue getShuffleHalfVectors(const SDLoc &DL, SDValue V1, SDValue V2, | |||
16703 | ArrayRef<int> HalfMask, int HalfIdx1, | |||
16704 | int HalfIdx2, bool UndefLower, | |||
16705 | SelectionDAG &DAG, bool UseConcat = false) { | |||
16706 | assert(V1.getValueType() == V2.getValueType() && "Different sized vectors?")(static_cast <bool> (V1.getValueType() == V2.getValueType () && "Different sized vectors?") ? void (0) : __assert_fail ("V1.getValueType() == V2.getValueType() && \"Different sized vectors?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 16706, __extension__ __PRETTY_FUNCTION__)); | |||
16707 | assert(V1.getValueType().isSimple() && "Expecting only simple types")(static_cast <bool> (V1.getValueType().isSimple() && "Expecting only simple types") ? void (0) : __assert_fail ("V1.getValueType().isSimple() && \"Expecting only simple types\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 16707, __extension__ __PRETTY_FUNCTION__)); | |||
16708 | ||||
16709 | MVT VT = V1.getSimpleValueType(); | |||
16710 | MVT HalfVT = VT.getHalfNumVectorElementsVT(); | |||
16711 | unsigned HalfNumElts = HalfVT.getVectorNumElements(); | |||
16712 | ||||
16713 | auto getHalfVector = [&](int HalfIdx) { | |||
16714 | if (HalfIdx < 0) | |||
16715 | return DAG.getUNDEF(HalfVT); | |||
16716 | SDValue V = (HalfIdx < 2 ? V1 : V2); | |||
16717 | HalfIdx = (HalfIdx % 2) * HalfNumElts; | |||
16718 | return DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, HalfVT, V, | |||
16719 | DAG.getIntPtrConstant(HalfIdx, DL)); | |||
16720 | }; | |||
16721 | ||||
16722 | // ins undef, (shuf (ext V1, HalfIdx1), (ext V2, HalfIdx2), HalfMask), Offset | |||
16723 | SDValue Half1 = getHalfVector(HalfIdx1); | |||
16724 | SDValue Half2 = getHalfVector(HalfIdx2); | |||
16725 | SDValue V = DAG.getVectorShuffle(HalfVT, DL, Half1, Half2, HalfMask); | |||
16726 | if (UseConcat) { | |||
16727 | SDValue Op0 = V; | |||
16728 | SDValue Op1 = DAG.getUNDEF(HalfVT); | |||
16729 | if (UndefLower) | |||
16730 | std::swap(Op0, Op1); | |||
16731 | return DAG.getNode(ISD::CONCAT_VECTORS, DL, VT, Op0, Op1); | |||
16732 | } | |||
16733 | ||||
16734 | unsigned Offset = UndefLower ? HalfNumElts : 0; | |||
16735 | return DAG.getNode(ISD::INSERT_SUBVECTOR, DL, VT, DAG.getUNDEF(VT), V, | |||
16736 | DAG.getIntPtrConstant(Offset, DL)); | |||
16737 | } | |||
16738 | ||||
16739 | /// Lower shuffles where an entire half of a 256 or 512-bit vector is UNDEF. | |||
16740 | /// This allows for fast cases such as subvector extraction/insertion | |||
16741 | /// or shuffling smaller vector types which can lower more efficiently. | |||
16742 | static SDValue lowerShuffleWithUndefHalf(const SDLoc &DL, MVT VT, SDValue V1, | |||
16743 | SDValue V2, ArrayRef<int> Mask, | |||
16744 | const X86Subtarget &Subtarget, | |||
16745 | SelectionDAG &DAG) { | |||
16746 | assert((VT.is256BitVector() || VT.is512BitVector()) &&(static_cast <bool> ((VT.is256BitVector() || VT.is512BitVector ()) && "Expected 256-bit or 512-bit vector") ? void ( 0) : __assert_fail ("(VT.is256BitVector() || VT.is512BitVector()) && \"Expected 256-bit or 512-bit vector\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 16747, __extension__ __PRETTY_FUNCTION__)) | |||
16747 | "Expected 256-bit or 512-bit vector")(static_cast <bool> ((VT.is256BitVector() || VT.is512BitVector ()) && "Expected 256-bit or 512-bit vector") ? void ( 0) : __assert_fail ("(VT.is256BitVector() || VT.is512BitVector()) && \"Expected 256-bit or 512-bit vector\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 16747, __extension__ __PRETTY_FUNCTION__)); | |||
16748 | ||||
16749 | bool UndefLower = isUndefLowerHalf(Mask); | |||
16750 | if (!UndefLower && !isUndefUpperHalf(Mask)) | |||
16751 | return SDValue(); | |||
16752 | ||||
16753 | assert((!UndefLower || !isUndefUpperHalf(Mask)) &&(static_cast <bool> ((!UndefLower || !isUndefUpperHalf( Mask)) && "Completely undef shuffle mask should have been simplified already" ) ? void (0) : __assert_fail ("(!UndefLower || !isUndefUpperHalf(Mask)) && \"Completely undef shuffle mask should have been simplified already\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 16754, __extension__ __PRETTY_FUNCTION__)) | |||
16754 | "Completely undef shuffle mask should have been simplified already")(static_cast <bool> ((!UndefLower || !isUndefUpperHalf( Mask)) && "Completely undef shuffle mask should have been simplified already" ) ? void (0) : __assert_fail ("(!UndefLower || !isUndefUpperHalf(Mask)) && \"Completely undef shuffle mask should have been simplified already\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 16754, __extension__ __PRETTY_FUNCTION__)); | |||
16755 | ||||
16756 | // Upper half is undef and lower half is whole upper subvector. | |||
16757 | // e.g. vector_shuffle <4, 5, 6, 7, u, u, u, u> or <2, 3, u, u> | |||
16758 | MVT HalfVT = VT.getHalfNumVectorElementsVT(); | |||
16759 | unsigned HalfNumElts = HalfVT.getVectorNumElements(); | |||
16760 | if (!UndefLower && | |||
16761 | isSequentialOrUndefInRange(Mask, 0, HalfNumElts, HalfNumElts)) { | |||
16762 | SDValue Hi = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, HalfVT, V1, | |||
16763 | DAG.getIntPtrConstant(HalfNumElts, DL)); | |||
16764 | return DAG.getNode(ISD::INSERT_SUBVECTOR, DL, VT, DAG.getUNDEF(VT), Hi, | |||
16765 | DAG.getIntPtrConstant(0, DL)); | |||
16766 | } | |||
16767 | ||||
16768 | // Lower half is undef and upper half is whole lower subvector. | |||
16769 | // e.g. vector_shuffle <u, u, u, u, 0, 1, 2, 3> or <u, u, 0, 1> | |||
16770 | if (UndefLower && | |||
16771 | isSequentialOrUndefInRange(Mask, HalfNumElts, HalfNumElts, 0)) { | |||
16772 | SDValue Hi = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, HalfVT, V1, | |||
16773 | DAG.getIntPtrConstant(0, DL)); | |||
16774 | return DAG.getNode(ISD::INSERT_SUBVECTOR, DL, VT, DAG.getUNDEF(VT), Hi, | |||
16775 | DAG.getIntPtrConstant(HalfNumElts, DL)); | |||
16776 | } | |||
16777 | ||||
16778 | int HalfIdx1, HalfIdx2; | |||
16779 | SmallVector<int, 8> HalfMask(HalfNumElts); | |||
16780 | if (!getHalfShuffleMask(Mask, HalfMask, HalfIdx1, HalfIdx2)) | |||
16781 | return SDValue(); | |||
16782 | ||||
16783 | assert(HalfMask.size() == HalfNumElts && "Unexpected shuffle mask length")(static_cast <bool> (HalfMask.size() == HalfNumElts && "Unexpected shuffle mask length") ? void (0) : __assert_fail ("HalfMask.size() == HalfNumElts && \"Unexpected shuffle mask length\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 16783, __extension__ __PRETTY_FUNCTION__)); | |||
16784 | ||||
16785 | // Only shuffle the halves of the inputs when useful. | |||
16786 | unsigned NumLowerHalves = | |||
16787 | (HalfIdx1 == 0 || HalfIdx1 == 2) + (HalfIdx2 == 0 || HalfIdx2 == 2); | |||
16788 | unsigned NumUpperHalves = | |||
16789 | (HalfIdx1 == 1 || HalfIdx1 == 3) + (HalfIdx2 == 1 || HalfIdx2 == 3); | |||
16790 | assert(NumLowerHalves + NumUpperHalves <= 2 && "Only 1 or 2 halves allowed")(static_cast <bool> (NumLowerHalves + NumUpperHalves <= 2 && "Only 1 or 2 halves allowed") ? void (0) : __assert_fail ("NumLowerHalves + NumUpperHalves <= 2 && \"Only 1 or 2 halves allowed\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 16790, __extension__ __PRETTY_FUNCTION__)); | |||
16791 | ||||
16792 | // Determine the larger pattern of undef/halves, then decide if it's worth | |||
16793 | // splitting the shuffle based on subtarget capabilities and types. | |||
16794 | unsigned EltWidth = VT.getVectorElementType().getSizeInBits(); | |||
16795 | if (!UndefLower) { | |||
16796 | // XXXXuuuu: no insert is needed. | |||
16797 | // Always extract lowers when setting lower - these are all free subreg ops. | |||
16798 | if (NumUpperHalves == 0) | |||
16799 | return getShuffleHalfVectors(DL, V1, V2, HalfMask, HalfIdx1, HalfIdx2, | |||
16800 | UndefLower, DAG); | |||
16801 | ||||
16802 | if (NumUpperHalves == 1) { | |||
16803 | // AVX2 has efficient 32/64-bit element cross-lane shuffles. | |||
16804 | if (Subtarget.hasAVX2()) { | |||
16805 | // extract128 + vunpckhps/vshufps, is better than vblend + vpermps. | |||
16806 | if (EltWidth == 32 && NumLowerHalves && HalfVT.is128BitVector() && | |||
16807 | !is128BitUnpackShuffleMask(HalfMask) && | |||
16808 | (!isSingleSHUFPSMask(HalfMask) || | |||
16809 | Subtarget.hasFastVariableCrossLaneShuffle())) | |||
16810 | return SDValue(); | |||
16811 | // If this is a unary shuffle (assume that the 2nd operand is | |||
16812 | // canonicalized to undef), then we can use vpermpd. Otherwise, we | |||
16813 | // are better off extracting the upper half of 1 operand and using a | |||
16814 | // narrow shuffle. | |||
16815 | if (EltWidth == 64 && V2.isUndef()) | |||
16816 | return SDValue(); | |||
16817 | } | |||
16818 | // AVX512 has efficient cross-lane shuffles for all legal 512-bit types. | |||
16819 | if (Subtarget.hasAVX512() && VT.is512BitVector()) | |||
16820 | return SDValue(); | |||
16821 | // Extract + narrow shuffle is better than the wide alternative. | |||
16822 | return getShuffleHalfVectors(DL, V1, V2, HalfMask, HalfIdx1, HalfIdx2, | |||
16823 | UndefLower, DAG); | |||
16824 | } | |||
16825 | ||||
16826 | // Don't extract both uppers, instead shuffle and then extract. | |||
16827 | assert(NumUpperHalves == 2 && "Half vector count went wrong")(static_cast <bool> (NumUpperHalves == 2 && "Half vector count went wrong" ) ? void (0) : __assert_fail ("NumUpperHalves == 2 && \"Half vector count went wrong\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 16827, __extension__ __PRETTY_FUNCTION__)); | |||
16828 | return SDValue(); | |||
16829 | } | |||
16830 | ||||
16831 | // UndefLower - uuuuXXXX: an insert to high half is required if we split this. | |||
16832 | if (NumUpperHalves == 0) { | |||
16833 | // AVX2 has efficient 64-bit element cross-lane shuffles. | |||
16834 | // TODO: Refine to account for unary shuffle, splat, and other masks? | |||
16835 | if (Subtarget.hasAVX2() && EltWidth == 64) | |||
16836 | return SDValue(); | |||
16837 | // AVX512 has efficient cross-lane shuffles for all legal 512-bit types. | |||
16838 | if (Subtarget.hasAVX512() && VT.is512BitVector()) | |||
16839 | return SDValue(); | |||
16840 | // Narrow shuffle + insert is better than the wide alternative. | |||
16841 | return getShuffleHalfVectors(DL, V1, V2, HalfMask, HalfIdx1, HalfIdx2, | |||
16842 | UndefLower, DAG); | |||
16843 | } | |||
16844 | ||||
16845 | // NumUpperHalves != 0: don't bother with extract, shuffle, and then insert. | |||
16846 | return SDValue(); | |||
16847 | } | |||
16848 | ||||
16849 | /// Test whether the specified input (0 or 1) is in-place blended by the | |||
16850 | /// given mask. | |||
16851 | /// | |||
16852 | /// This returns true if the elements from a particular input are already in the | |||
16853 | /// slot required by the given mask and require no permutation. | |||
16854 | static bool isShuffleMaskInputInPlace(int Input, ArrayRef<int> Mask) { | |||
16855 | assert((Input == 0 || Input == 1) && "Only two inputs to shuffles.")(static_cast <bool> ((Input == 0 || Input == 1) && "Only two inputs to shuffles.") ? void (0) : __assert_fail ( "(Input == 0 || Input == 1) && \"Only two inputs to shuffles.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 16855, __extension__ __PRETTY_FUNCTION__)); | |||
16856 | int Size = Mask.size(); | |||
16857 | for (int i = 0; i < Size; ++i) | |||
16858 | if (Mask[i] >= 0 && Mask[i] / Size == Input && Mask[i] % Size != i) | |||
16859 | return false; | |||
16860 | ||||
16861 | return true; | |||
16862 | } | |||
16863 | ||||
16864 | /// Handle case where shuffle sources are coming from the same 128-bit lane and | |||
16865 | /// every lane can be represented as the same repeating mask - allowing us to | |||
16866 | /// shuffle the sources with the repeating shuffle and then permute the result | |||
16867 | /// to the destination lanes. | |||
16868 | static SDValue lowerShuffleAsRepeatedMaskAndLanePermute( | |||
16869 | const SDLoc &DL, MVT VT, SDValue V1, SDValue V2, ArrayRef<int> Mask, | |||
16870 | const X86Subtarget &Subtarget, SelectionDAG &DAG) { | |||
16871 | int NumElts = VT.getVectorNumElements(); | |||
16872 | int NumLanes = VT.getSizeInBits() / 128; | |||
16873 | int NumLaneElts = NumElts / NumLanes; | |||
16874 | ||||
16875 | // On AVX2 we may be able to just shuffle the lowest elements and then | |||
16876 | // broadcast the result. | |||
16877 | if (Subtarget.hasAVX2()) { | |||
16878 | for (unsigned BroadcastSize : {16, 32, 64}) { | |||
16879 | if (BroadcastSize <= VT.getScalarSizeInBits()) | |||
16880 | continue; | |||
16881 | int NumBroadcastElts = BroadcastSize / VT.getScalarSizeInBits(); | |||
16882 | ||||
16883 | // Attempt to match a repeating pattern every NumBroadcastElts, | |||
16884 | // accounting for UNDEFs but only references the lowest 128-bit | |||
16885 | // lane of the inputs. | |||
16886 | auto FindRepeatingBroadcastMask = [&](SmallVectorImpl<int> &RepeatMask) { | |||
16887 | for (int i = 0; i != NumElts; i += NumBroadcastElts) | |||
16888 | for (int j = 0; j != NumBroadcastElts; ++j) { | |||
16889 | int M = Mask[i + j]; | |||
16890 | if (M < 0) | |||
16891 | continue; | |||
16892 | int &R = RepeatMask[j]; | |||
16893 | if (0 != ((M % NumElts) / NumLaneElts)) | |||
16894 | return false; | |||
16895 | if (0 <= R && R != M) | |||
16896 | return false; | |||
16897 | R = M; | |||
16898 | } | |||
16899 | return true; | |||
16900 | }; | |||
16901 | ||||
16902 | SmallVector<int, 8> RepeatMask((unsigned)NumElts, -1); | |||
16903 | if (!FindRepeatingBroadcastMask(RepeatMask)) | |||
16904 | continue; | |||
16905 | ||||
16906 | // Shuffle the (lowest) repeated elements in place for broadcast. | |||
16907 | SDValue RepeatShuf = DAG.getVectorShuffle(VT, DL, V1, V2, RepeatMask); | |||
16908 | ||||
16909 | // Shuffle the actual broadcast. | |||
16910 | SmallVector<int, 8> BroadcastMask((unsigned)NumElts, -1); | |||
16911 | for (int i = 0; i != NumElts; i += NumBroadcastElts) | |||
16912 | for (int j = 0; j != NumBroadcastElts; ++j) | |||
16913 | BroadcastMask[i + j] = j; | |||
16914 | return DAG.getVectorShuffle(VT, DL, RepeatShuf, DAG.getUNDEF(VT), | |||
16915 | BroadcastMask); | |||
16916 | } | |||
16917 | } | |||
16918 | ||||
16919 | // Bail if the shuffle mask doesn't cross 128-bit lanes. | |||
16920 | if (!is128BitLaneCrossingShuffleMask(VT, Mask)) | |||
16921 | return SDValue(); | |||
16922 | ||||
16923 | // Bail if we already have a repeated lane shuffle mask. | |||
16924 | SmallVector<int, 8> RepeatedShuffleMask; | |||
16925 | if (is128BitLaneRepeatedShuffleMask(VT, Mask, RepeatedShuffleMask)) | |||
16926 | return SDValue(); | |||
16927 | ||||
16928 | // On AVX2 targets we can permute 256-bit vectors as 64-bit sub-lanes | |||
16929 | // (with PERMQ/PERMPD), otherwise we can only permute whole 128-bit lanes. | |||
16930 | int SubLaneScale = Subtarget.hasAVX2() && VT.is256BitVector() ? 2 : 1; | |||
16931 | int NumSubLanes = NumLanes * SubLaneScale; | |||
16932 | int NumSubLaneElts = NumLaneElts / SubLaneScale; | |||
16933 | ||||
16934 | // Check that all the sources are coming from the same lane and see if we can | |||
16935 | // form a repeating shuffle mask (local to each sub-lane). At the same time, | |||
16936 | // determine the source sub-lane for each destination sub-lane. | |||
16937 | int TopSrcSubLane = -1; | |||
16938 | SmallVector<int, 8> Dst2SrcSubLanes((unsigned)NumSubLanes, -1); | |||
16939 | SmallVector<int, 8> RepeatedSubLaneMasks[2] = { | |||
16940 | SmallVector<int, 8>((unsigned)NumSubLaneElts, SM_SentinelUndef), | |||
16941 | SmallVector<int, 8>((unsigned)NumSubLaneElts, SM_SentinelUndef)}; | |||
16942 | ||||
16943 | for (int DstSubLane = 0; DstSubLane != NumSubLanes; ++DstSubLane) { | |||
16944 | // Extract the sub-lane mask, check that it all comes from the same lane | |||
16945 | // and normalize the mask entries to come from the first lane. | |||
16946 | int SrcLane = -1; | |||
16947 | SmallVector<int, 8> SubLaneMask((unsigned)NumSubLaneElts, -1); | |||
16948 | for (int Elt = 0; Elt != NumSubLaneElts; ++Elt) { | |||
16949 | int M = Mask[(DstSubLane * NumSubLaneElts) + Elt]; | |||
16950 | if (M < 0) | |||
16951 | continue; | |||
16952 | int Lane = (M % NumElts) / NumLaneElts; | |||
16953 | if ((0 <= SrcLane) && (SrcLane != Lane)) | |||
16954 | return SDValue(); | |||
16955 | SrcLane = Lane; | |||
16956 | int LocalM = (M % NumLaneElts) + (M < NumElts ? 0 : NumElts); | |||
16957 | SubLaneMask[Elt] = LocalM; | |||
16958 | } | |||
16959 | ||||
16960 | // Whole sub-lane is UNDEF. | |||
16961 | if (SrcLane < 0) | |||
16962 | continue; | |||
16963 | ||||
16964 | // Attempt to match against the candidate repeated sub-lane masks. | |||
16965 | for (int SubLane = 0; SubLane != SubLaneScale; ++SubLane) { | |||
16966 | auto MatchMasks = [NumSubLaneElts](ArrayRef<int> M1, ArrayRef<int> M2) { | |||
16967 | for (int i = 0; i != NumSubLaneElts; ++i) { | |||
16968 | if (M1[i] < 0 || M2[i] < 0) | |||
16969 | continue; | |||
16970 | if (M1[i] != M2[i]) | |||
16971 | return false; | |||
16972 | } | |||
16973 | return true; | |||
16974 | }; | |||
16975 | ||||
16976 | auto &RepeatedSubLaneMask = RepeatedSubLaneMasks[SubLane]; | |||
16977 | if (!MatchMasks(SubLaneMask, RepeatedSubLaneMask)) | |||
16978 | continue; | |||
16979 | ||||
16980 | // Merge the sub-lane mask into the matching repeated sub-lane mask. | |||
16981 | for (int i = 0; i != NumSubLaneElts; ++i) { | |||
16982 | int M = SubLaneMask[i]; | |||
16983 | if (M < 0) | |||
16984 | continue; | |||
16985 | assert((RepeatedSubLaneMask[i] < 0 || RepeatedSubLaneMask[i] == M) &&(static_cast <bool> ((RepeatedSubLaneMask[i] < 0 || RepeatedSubLaneMask [i] == M) && "Unexpected mask element") ? void (0) : __assert_fail ("(RepeatedSubLaneMask[i] < 0 || RepeatedSubLaneMask[i] == M) && \"Unexpected mask element\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 16986, __extension__ __PRETTY_FUNCTION__)) | |||
16986 | "Unexpected mask element")(static_cast <bool> ((RepeatedSubLaneMask[i] < 0 || RepeatedSubLaneMask [i] == M) && "Unexpected mask element") ? void (0) : __assert_fail ("(RepeatedSubLaneMask[i] < 0 || RepeatedSubLaneMask[i] == M) && \"Unexpected mask element\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 16986, __extension__ __PRETTY_FUNCTION__)); | |||
16987 | RepeatedSubLaneMask[i] = M; | |||
16988 | } | |||
16989 | ||||
16990 | // Track the top most source sub-lane - by setting the remaining to UNDEF | |||
16991 | // we can greatly simplify shuffle matching. | |||
16992 | int SrcSubLane = (SrcLane * SubLaneScale) + SubLane; | |||
16993 | TopSrcSubLane = std::max(TopSrcSubLane, SrcSubLane); | |||
16994 | Dst2SrcSubLanes[DstSubLane] = SrcSubLane; | |||
16995 | break; | |||
16996 | } | |||
16997 | ||||
16998 | // Bail if we failed to find a matching repeated sub-lane mask. | |||
16999 | if (Dst2SrcSubLanes[DstSubLane] < 0) | |||
17000 | return SDValue(); | |||
17001 | } | |||
17002 | assert(0 <= TopSrcSubLane && TopSrcSubLane < NumSubLanes &&(static_cast <bool> (0 <= TopSrcSubLane && TopSrcSubLane < NumSubLanes && "Unexpected source lane") ? void (0) : __assert_fail ("0 <= TopSrcSubLane && TopSrcSubLane < NumSubLanes && \"Unexpected source lane\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17003, __extension__ __PRETTY_FUNCTION__)) | |||
17003 | "Unexpected source lane")(static_cast <bool> (0 <= TopSrcSubLane && TopSrcSubLane < NumSubLanes && "Unexpected source lane") ? void (0) : __assert_fail ("0 <= TopSrcSubLane && TopSrcSubLane < NumSubLanes && \"Unexpected source lane\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17003, __extension__ __PRETTY_FUNCTION__)); | |||
17004 | ||||
17005 | // Create a repeating shuffle mask for the entire vector. | |||
17006 | SmallVector<int, 8> RepeatedMask((unsigned)NumElts, -1); | |||
17007 | for (int SubLane = 0; SubLane <= TopSrcSubLane; ++SubLane) { | |||
17008 | int Lane = SubLane / SubLaneScale; | |||
17009 | auto &RepeatedSubLaneMask = RepeatedSubLaneMasks[SubLane % SubLaneScale]; | |||
17010 | for (int Elt = 0; Elt != NumSubLaneElts; ++Elt) { | |||
17011 | int M = RepeatedSubLaneMask[Elt]; | |||
17012 | if (M < 0) | |||
17013 | continue; | |||
17014 | int Idx = (SubLane * NumSubLaneElts) + Elt; | |||
17015 | RepeatedMask[Idx] = M + (Lane * NumLaneElts); | |||
17016 | } | |||
17017 | } | |||
17018 | SDValue RepeatedShuffle = DAG.getVectorShuffle(VT, DL, V1, V2, RepeatedMask); | |||
17019 | ||||
17020 | // Shuffle each source sub-lane to its destination. | |||
17021 | SmallVector<int, 8> SubLaneMask((unsigned)NumElts, -1); | |||
17022 | for (int i = 0; i != NumElts; i += NumSubLaneElts) { | |||
17023 | int SrcSubLane = Dst2SrcSubLanes[i / NumSubLaneElts]; | |||
17024 | if (SrcSubLane < 0) | |||
17025 | continue; | |||
17026 | for (int j = 0; j != NumSubLaneElts; ++j) | |||
17027 | SubLaneMask[i + j] = j + (SrcSubLane * NumSubLaneElts); | |||
17028 | } | |||
17029 | ||||
17030 | return DAG.getVectorShuffle(VT, DL, RepeatedShuffle, DAG.getUNDEF(VT), | |||
17031 | SubLaneMask); | |||
17032 | } | |||
17033 | ||||
17034 | static bool matchShuffleWithSHUFPD(MVT VT, SDValue &V1, SDValue &V2, | |||
17035 | bool &ForceV1Zero, bool &ForceV2Zero, | |||
17036 | unsigned &ShuffleImm, ArrayRef<int> Mask, | |||
17037 | const APInt &Zeroable) { | |||
17038 | int NumElts = VT.getVectorNumElements(); | |||
17039 | assert(VT.getScalarSizeInBits() == 64 &&(static_cast <bool> (VT.getScalarSizeInBits() == 64 && (NumElts == 2 || NumElts == 4 || NumElts == 8) && "Unexpected data type for VSHUFPD" ) ? void (0) : __assert_fail ("VT.getScalarSizeInBits() == 64 && (NumElts == 2 || NumElts == 4 || NumElts == 8) && \"Unexpected data type for VSHUFPD\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17041, __extension__ __PRETTY_FUNCTION__)) | |||
17040 | (NumElts == 2 || NumElts == 4 || NumElts == 8) &&(static_cast <bool> (VT.getScalarSizeInBits() == 64 && (NumElts == 2 || NumElts == 4 || NumElts == 8) && "Unexpected data type for VSHUFPD" ) ? void (0) : __assert_fail ("VT.getScalarSizeInBits() == 64 && (NumElts == 2 || NumElts == 4 || NumElts == 8) && \"Unexpected data type for VSHUFPD\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17041, __extension__ __PRETTY_FUNCTION__)) | |||
17041 | "Unexpected data type for VSHUFPD")(static_cast <bool> (VT.getScalarSizeInBits() == 64 && (NumElts == 2 || NumElts == 4 || NumElts == 8) && "Unexpected data type for VSHUFPD" ) ? void (0) : __assert_fail ("VT.getScalarSizeInBits() == 64 && (NumElts == 2 || NumElts == 4 || NumElts == 8) && \"Unexpected data type for VSHUFPD\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17041, __extension__ __PRETTY_FUNCTION__)); | |||
17042 | assert(isUndefOrZeroOrInRange(Mask, 0, 2 * NumElts) &&(static_cast <bool> (isUndefOrZeroOrInRange(Mask, 0, 2 * NumElts) && "Illegal shuffle mask") ? void (0) : __assert_fail ("isUndefOrZeroOrInRange(Mask, 0, 2 * NumElts) && \"Illegal shuffle mask\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17043, __extension__ __PRETTY_FUNCTION__)) | |||
17043 | "Illegal shuffle mask")(static_cast <bool> (isUndefOrZeroOrInRange(Mask, 0, 2 * NumElts) && "Illegal shuffle mask") ? void (0) : __assert_fail ("isUndefOrZeroOrInRange(Mask, 0, 2 * NumElts) && \"Illegal shuffle mask\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17043, __extension__ __PRETTY_FUNCTION__)); | |||
17044 | ||||
17045 | bool ZeroLane[2] = { true, true }; | |||
17046 | for (int i = 0; i < NumElts; ++i) | |||
17047 | ZeroLane[i & 1] &= Zeroable[i]; | |||
17048 | ||||
17049 | // Mask for V8F64: 0/1, 8/9, 2/3, 10/11, 4/5, .. | |||
17050 | // Mask for V4F64; 0/1, 4/5, 2/3, 6/7.. | |||
17051 | ShuffleImm = 0; | |||
17052 | bool ShufpdMask = true; | |||
17053 | bool CommutableMask = true; | |||
17054 | for (int i = 0; i < NumElts; ++i) { | |||
17055 | if (Mask[i] == SM_SentinelUndef || ZeroLane[i & 1]) | |||
17056 | continue; | |||
17057 | if (Mask[i] < 0) | |||
17058 | return false; | |||
17059 | int Val = (i & 6) + NumElts * (i & 1); | |||
17060 | int CommutVal = (i & 0xe) + NumElts * ((i & 1) ^ 1); | |||
17061 | if (Mask[i] < Val || Mask[i] > Val + 1) | |||
17062 | ShufpdMask = false; | |||
17063 | if (Mask[i] < CommutVal || Mask[i] > CommutVal + 1) | |||
17064 | CommutableMask = false; | |||
17065 | ShuffleImm |= (Mask[i] % 2) << i; | |||
17066 | } | |||
17067 | ||||
17068 | if (!ShufpdMask && !CommutableMask) | |||
17069 | return false; | |||
17070 | ||||
17071 | if (!ShufpdMask && CommutableMask) | |||
17072 | std::swap(V1, V2); | |||
17073 | ||||
17074 | ForceV1Zero = ZeroLane[0]; | |||
17075 | ForceV2Zero = ZeroLane[1]; | |||
17076 | return true; | |||
17077 | } | |||
17078 | ||||
17079 | static SDValue lowerShuffleWithSHUFPD(const SDLoc &DL, MVT VT, SDValue V1, | |||
17080 | SDValue V2, ArrayRef<int> Mask, | |||
17081 | const APInt &Zeroable, | |||
17082 | const X86Subtarget &Subtarget, | |||
17083 | SelectionDAG &DAG) { | |||
17084 | assert((VT == MVT::v2f64 || VT == MVT::v4f64 || VT == MVT::v8f64) &&(static_cast <bool> ((VT == MVT::v2f64 || VT == MVT::v4f64 || VT == MVT::v8f64) && "Unexpected data type for VSHUFPD" ) ? void (0) : __assert_fail ("(VT == MVT::v2f64 || VT == MVT::v4f64 || VT == MVT::v8f64) && \"Unexpected data type for VSHUFPD\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17085, __extension__ __PRETTY_FUNCTION__)) | |||
17085 | "Unexpected data type for VSHUFPD")(static_cast <bool> ((VT == MVT::v2f64 || VT == MVT::v4f64 || VT == MVT::v8f64) && "Unexpected data type for VSHUFPD" ) ? void (0) : __assert_fail ("(VT == MVT::v2f64 || VT == MVT::v4f64 || VT == MVT::v8f64) && \"Unexpected data type for VSHUFPD\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17085, __extension__ __PRETTY_FUNCTION__)); | |||
17086 | ||||
17087 | unsigned Immediate = 0; | |||
17088 | bool ForceV1Zero = false, ForceV2Zero = false; | |||
17089 | if (!matchShuffleWithSHUFPD(VT, V1, V2, ForceV1Zero, ForceV2Zero, Immediate, | |||
17090 | Mask, Zeroable)) | |||
17091 | return SDValue(); | |||
17092 | ||||
17093 | // Create a REAL zero vector - ISD::isBuildVectorAllZeros allows UNDEFs. | |||
17094 | if (ForceV1Zero) | |||
17095 | V1 = getZeroVector(VT, Subtarget, DAG, DL); | |||
17096 | if (ForceV2Zero) | |||
17097 | V2 = getZeroVector(VT, Subtarget, DAG, DL); | |||
17098 | ||||
17099 | return DAG.getNode(X86ISD::SHUFP, DL, VT, V1, V2, | |||
17100 | DAG.getTargetConstant(Immediate, DL, MVT::i8)); | |||
17101 | } | |||
17102 | ||||
17103 | // Look for {0, 8, 16, 24, 32, 40, 48, 56 } in the first 8 elements. Followed | |||
17104 | // by zeroable elements in the remaining 24 elements. Turn this into two | |||
17105 | // vmovqb instructions shuffled together. | |||
17106 | static SDValue lowerShuffleAsVTRUNCAndUnpack(const SDLoc &DL, MVT VT, | |||
17107 | SDValue V1, SDValue V2, | |||
17108 | ArrayRef<int> Mask, | |||
17109 | const APInt &Zeroable, | |||
17110 | SelectionDAG &DAG) { | |||
17111 | assert(VT == MVT::v32i8 && "Unexpected type!")(static_cast <bool> (VT == MVT::v32i8 && "Unexpected type!" ) ? void (0) : __assert_fail ("VT == MVT::v32i8 && \"Unexpected type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17111, __extension__ __PRETTY_FUNCTION__)); | |||
17112 | ||||
17113 | // The first 8 indices should be every 8th element. | |||
17114 | if (!isSequentialOrUndefInRange(Mask, 0, 8, 0, 8)) | |||
17115 | return SDValue(); | |||
17116 | ||||
17117 | // Remaining elements need to be zeroable. | |||
17118 | if (Zeroable.countLeadingOnes() < (Mask.size() - 8)) | |||
17119 | return SDValue(); | |||
17120 | ||||
17121 | V1 = DAG.getBitcast(MVT::v4i64, V1); | |||
17122 | V2 = DAG.getBitcast(MVT::v4i64, V2); | |||
17123 | ||||
17124 | V1 = DAG.getNode(X86ISD::VTRUNC, DL, MVT::v16i8, V1); | |||
17125 | V2 = DAG.getNode(X86ISD::VTRUNC, DL, MVT::v16i8, V2); | |||
17126 | ||||
17127 | // The VTRUNCs will put 0s in the upper 12 bytes. Use them to put zeroes in | |||
17128 | // the upper bits of the result using an unpckldq. | |||
17129 | SDValue Unpack = DAG.getVectorShuffle(MVT::v16i8, DL, V1, V2, | |||
17130 | { 0, 1, 2, 3, 16, 17, 18, 19, | |||
17131 | 4, 5, 6, 7, 20, 21, 22, 23 }); | |||
17132 | // Insert the unpckldq into a zero vector to widen to v32i8. | |||
17133 | return DAG.getNode(ISD::INSERT_SUBVECTOR, DL, MVT::v32i8, | |||
17134 | DAG.getConstant(0, DL, MVT::v32i8), Unpack, | |||
17135 | DAG.getIntPtrConstant(0, DL)); | |||
17136 | } | |||
17137 | ||||
17138 | ||||
17139 | /// Handle lowering of 4-lane 64-bit floating point shuffles. | |||
17140 | /// | |||
17141 | /// Also ends up handling lowering of 4-lane 64-bit integer shuffles when AVX2 | |||
17142 | /// isn't available. | |||
17143 | static SDValue lowerV4F64Shuffle(const SDLoc &DL, ArrayRef<int> Mask, | |||
17144 | const APInt &Zeroable, SDValue V1, SDValue V2, | |||
17145 | const X86Subtarget &Subtarget, | |||
17146 | SelectionDAG &DAG) { | |||
17147 | assert(V1.getSimpleValueType() == MVT::v4f64 && "Bad operand type!")(static_cast <bool> (V1.getSimpleValueType() == MVT::v4f64 && "Bad operand type!") ? void (0) : __assert_fail ( "V1.getSimpleValueType() == MVT::v4f64 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17147, __extension__ __PRETTY_FUNCTION__)); | |||
17148 | assert(V2.getSimpleValueType() == MVT::v4f64 && "Bad operand type!")(static_cast <bool> (V2.getSimpleValueType() == MVT::v4f64 && "Bad operand type!") ? void (0) : __assert_fail ( "V2.getSimpleValueType() == MVT::v4f64 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17148, __extension__ __PRETTY_FUNCTION__)); | |||
17149 | assert(Mask.size() == 4 && "Unexpected mask size for v4 shuffle!")(static_cast <bool> (Mask.size() == 4 && "Unexpected mask size for v4 shuffle!" ) ? void (0) : __assert_fail ("Mask.size() == 4 && \"Unexpected mask size for v4 shuffle!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17149, __extension__ __PRETTY_FUNCTION__)); | |||
17150 | ||||
17151 | if (SDValue V = lowerV2X128Shuffle(DL, MVT::v4f64, V1, V2, Mask, Zeroable, | |||
17152 | Subtarget, DAG)) | |||
17153 | return V; | |||
17154 | ||||
17155 | if (V2.isUndef()) { | |||
17156 | // Check for being able to broadcast a single element. | |||
17157 | if (SDValue Broadcast = lowerShuffleAsBroadcast(DL, MVT::v4f64, V1, V2, | |||
17158 | Mask, Subtarget, DAG)) | |||
17159 | return Broadcast; | |||
17160 | ||||
17161 | // Use low duplicate instructions for masks that match their pattern. | |||
17162 | if (isShuffleEquivalent(Mask, {0, 0, 2, 2}, V1, V2)) | |||
17163 | return DAG.getNode(X86ISD::MOVDDUP, DL, MVT::v4f64, V1); | |||
17164 | ||||
17165 | if (!is128BitLaneCrossingShuffleMask(MVT::v4f64, Mask)) { | |||
17166 | // Non-half-crossing single input shuffles can be lowered with an | |||
17167 | // interleaved permutation. | |||
17168 | unsigned VPERMILPMask = (Mask[0] == 1) | ((Mask[1] == 1) << 1) | | |||
17169 | ((Mask[2] == 3) << 2) | ((Mask[3] == 3) << 3); | |||
17170 | return DAG.getNode(X86ISD::VPERMILPI, DL, MVT::v4f64, V1, | |||
17171 | DAG.getTargetConstant(VPERMILPMask, DL, MVT::i8)); | |||
17172 | } | |||
17173 | ||||
17174 | // With AVX2 we have direct support for this permutation. | |||
17175 | if (Subtarget.hasAVX2()) | |||
17176 | return DAG.getNode(X86ISD::VPERMI, DL, MVT::v4f64, V1, | |||
17177 | getV4X86ShuffleImm8ForMask(Mask, DL, DAG)); | |||
17178 | ||||
17179 | // Try to create an in-lane repeating shuffle mask and then shuffle the | |||
17180 | // results into the target lanes. | |||
17181 | if (SDValue V = lowerShuffleAsRepeatedMaskAndLanePermute( | |||
17182 | DL, MVT::v4f64, V1, V2, Mask, Subtarget, DAG)) | |||
17183 | return V; | |||
17184 | ||||
17185 | // Try to permute the lanes and then use a per-lane permute. | |||
17186 | if (SDValue V = lowerShuffleAsLanePermuteAndPermute(DL, MVT::v4f64, V1, V2, | |||
17187 | Mask, DAG, Subtarget)) | |||
17188 | return V; | |||
17189 | ||||
17190 | // Otherwise, fall back. | |||
17191 | return lowerShuffleAsLanePermuteAndShuffle(DL, MVT::v4f64, V1, V2, Mask, | |||
17192 | DAG, Subtarget); | |||
17193 | } | |||
17194 | ||||
17195 | // Use dedicated unpack instructions for masks that match their pattern. | |||
17196 | if (SDValue V = lowerShuffleWithUNPCK(DL, MVT::v4f64, Mask, V1, V2, DAG)) | |||
17197 | return V; | |||
17198 | ||||
17199 | if (SDValue Blend = lowerShuffleAsBlend(DL, MVT::v4f64, V1, V2, Mask, | |||
17200 | Zeroable, Subtarget, DAG)) | |||
17201 | return Blend; | |||
17202 | ||||
17203 | // Check if the blend happens to exactly fit that of SHUFPD. | |||
17204 | if (SDValue Op = lowerShuffleWithSHUFPD(DL, MVT::v4f64, V1, V2, Mask, | |||
17205 | Zeroable, Subtarget, DAG)) | |||
17206 | return Op; | |||
17207 | ||||
17208 | // If we have lane crossing shuffles AND they don't all come from the lower | |||
17209 | // lane elements, lower to SHUFPD(VPERM2F128(V1, V2), VPERM2F128(V1, V2)). | |||
17210 | // TODO: Handle BUILD_VECTOR sources which getVectorShuffle currently | |||
17211 | // canonicalize to a blend of splat which isn't necessary for this combine. | |||
17212 | if (is128BitLaneCrossingShuffleMask(MVT::v4f64, Mask) && | |||
17213 | !all_of(Mask, [](int M) { return M < 2 || (4 <= M && M < 6); }) && | |||
17214 | (V1.getOpcode() != ISD::BUILD_VECTOR) && | |||
17215 | (V2.getOpcode() != ISD::BUILD_VECTOR)) | |||
17216 | if (SDValue Op = lowerShuffleAsLanePermuteAndSHUFP(DL, MVT::v4f64, V1, V2, | |||
17217 | Mask, DAG)) | |||
17218 | return Op; | |||
17219 | ||||
17220 | // If we have one input in place, then we can permute the other input and | |||
17221 | // blend the result. | |||
17222 | if (isShuffleMaskInputInPlace(0, Mask) || isShuffleMaskInputInPlace(1, Mask)) | |||
17223 | return lowerShuffleAsDecomposedShuffleMerge(DL, MVT::v4f64, V1, V2, Mask, | |||
17224 | Subtarget, DAG); | |||
17225 | ||||
17226 | // Try to create an in-lane repeating shuffle mask and then shuffle the | |||
17227 | // results into the target lanes. | |||
17228 | if (SDValue V = lowerShuffleAsRepeatedMaskAndLanePermute( | |||
17229 | DL, MVT::v4f64, V1, V2, Mask, Subtarget, DAG)) | |||
17230 | return V; | |||
17231 | ||||
17232 | // Try to simplify this by merging 128-bit lanes to enable a lane-based | |||
17233 | // shuffle. However, if we have AVX2 and either inputs are already in place, | |||
17234 | // we will be able to shuffle even across lanes the other input in a single | |||
17235 | // instruction so skip this pattern. | |||
17236 | if (!(Subtarget.hasAVX2() && (isShuffleMaskInputInPlace(0, Mask) || | |||
17237 | isShuffleMaskInputInPlace(1, Mask)))) | |||
17238 | if (SDValue V = lowerShuffleAsLanePermuteAndRepeatedMask( | |||
17239 | DL, MVT::v4f64, V1, V2, Mask, Subtarget, DAG)) | |||
17240 | return V; | |||
17241 | ||||
17242 | // If we have VLX support, we can use VEXPAND. | |||
17243 | if (Subtarget.hasVLX()) | |||
17244 | if (SDValue V = lowerShuffleToEXPAND(DL, MVT::v4f64, Zeroable, Mask, V1, V2, | |||
17245 | DAG, Subtarget)) | |||
17246 | return V; | |||
17247 | ||||
17248 | // If we have AVX2 then we always want to lower with a blend because an v4 we | |||
17249 | // can fully permute the elements. | |||
17250 | if (Subtarget.hasAVX2()) | |||
17251 | return lowerShuffleAsDecomposedShuffleMerge(DL, MVT::v4f64, V1, V2, Mask, | |||
17252 | Subtarget, DAG); | |||
17253 | ||||
17254 | // Otherwise fall back on generic lowering. | |||
17255 | return lowerShuffleAsSplitOrBlend(DL, MVT::v4f64, V1, V2, Mask, | |||
17256 | Subtarget, DAG); | |||
17257 | } | |||
17258 | ||||
17259 | /// Handle lowering of 4-lane 64-bit integer shuffles. | |||
17260 | /// | |||
17261 | /// This routine is only called when we have AVX2 and thus a reasonable | |||
17262 | /// instruction set for v4i64 shuffling.. | |||
17263 | static SDValue lowerV4I64Shuffle(const SDLoc &DL, ArrayRef<int> Mask, | |||
17264 | const APInt &Zeroable, SDValue V1, SDValue V2, | |||
17265 | const X86Subtarget &Subtarget, | |||
17266 | SelectionDAG &DAG) { | |||
17267 | assert(V1.getSimpleValueType() == MVT::v4i64 && "Bad operand type!")(static_cast <bool> (V1.getSimpleValueType() == MVT::v4i64 && "Bad operand type!") ? void (0) : __assert_fail ( "V1.getSimpleValueType() == MVT::v4i64 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17267, __extension__ __PRETTY_FUNCTION__)); | |||
17268 | assert(V2.getSimpleValueType() == MVT::v4i64 && "Bad operand type!")(static_cast <bool> (V2.getSimpleValueType() == MVT::v4i64 && "Bad operand type!") ? void (0) : __assert_fail ( "V2.getSimpleValueType() == MVT::v4i64 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17268, __extension__ __PRETTY_FUNCTION__)); | |||
17269 | assert(Mask.size() == 4 && "Unexpected mask size for v4 shuffle!")(static_cast <bool> (Mask.size() == 4 && "Unexpected mask size for v4 shuffle!" ) ? void (0) : __assert_fail ("Mask.size() == 4 && \"Unexpected mask size for v4 shuffle!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17269, __extension__ __PRETTY_FUNCTION__)); | |||
17270 | assert(Subtarget.hasAVX2() && "We can only lower v4i64 with AVX2!")(static_cast <bool> (Subtarget.hasAVX2() && "We can only lower v4i64 with AVX2!" ) ? void (0) : __assert_fail ("Subtarget.hasAVX2() && \"We can only lower v4i64 with AVX2!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17270, __extension__ __PRETTY_FUNCTION__)); | |||
17271 | ||||
17272 | if (SDValue V = lowerV2X128Shuffle(DL, MVT::v4i64, V1, V2, Mask, Zeroable, | |||
17273 | Subtarget, DAG)) | |||
17274 | return V; | |||
17275 | ||||
17276 | if (SDValue Blend = lowerShuffleAsBlend(DL, MVT::v4i64, V1, V2, Mask, | |||
17277 | Zeroable, Subtarget, DAG)) | |||
17278 | return Blend; | |||
17279 | ||||
17280 | // Check for being able to broadcast a single element. | |||
17281 | if (SDValue Broadcast = lowerShuffleAsBroadcast(DL, MVT::v4i64, V1, V2, Mask, | |||
17282 | Subtarget, DAG)) | |||
17283 | return Broadcast; | |||
17284 | ||||
17285 | if (V2.isUndef()) { | |||
17286 | // When the shuffle is mirrored between the 128-bit lanes of the unit, we | |||
17287 | // can use lower latency instructions that will operate on both lanes. | |||
17288 | SmallVector<int, 2> RepeatedMask; | |||
17289 | if (is128BitLaneRepeatedShuffleMask(MVT::v4i64, Mask, RepeatedMask)) { | |||
17290 | SmallVector<int, 4> PSHUFDMask; | |||
17291 | narrowShuffleMaskElts(2, RepeatedMask, PSHUFDMask); | |||
17292 | return DAG.getBitcast( | |||
17293 | MVT::v4i64, | |||
17294 | DAG.getNode(X86ISD::PSHUFD, DL, MVT::v8i32, | |||
17295 | DAG.getBitcast(MVT::v8i32, V1), | |||
17296 | getV4X86ShuffleImm8ForMask(PSHUFDMask, DL, DAG))); | |||
17297 | } | |||
17298 | ||||
17299 | // AVX2 provides a direct instruction for permuting a single input across | |||
17300 | // lanes. | |||
17301 | return DAG.getNode(X86ISD::VPERMI, DL, MVT::v4i64, V1, | |||
17302 | getV4X86ShuffleImm8ForMask(Mask, DL, DAG)); | |||
17303 | } | |||
17304 | ||||
17305 | // Try to use shift instructions. | |||
17306 | if (SDValue Shift = lowerShuffleAsShift(DL, MVT::v4i64, V1, V2, Mask, | |||
17307 | Zeroable, Subtarget, DAG)) | |||
17308 | return Shift; | |||
17309 | ||||
17310 | // If we have VLX support, we can use VALIGN or VEXPAND. | |||
17311 | if (Subtarget.hasVLX()) { | |||
17312 | if (SDValue Rotate = lowerShuffleAsVALIGN(DL, MVT::v4i64, V1, V2, Mask, | |||
17313 | Subtarget, DAG)) | |||
17314 | return Rotate; | |||
17315 | ||||
17316 | if (SDValue V = lowerShuffleToEXPAND(DL, MVT::v4i64, Zeroable, Mask, V1, V2, | |||
17317 | DAG, Subtarget)) | |||
17318 | return V; | |||
17319 | } | |||
17320 | ||||
17321 | // Try to use PALIGNR. | |||
17322 | if (SDValue Rotate = lowerShuffleAsByteRotate(DL, MVT::v4i64, V1, V2, Mask, | |||
17323 | Subtarget, DAG)) | |||
17324 | return Rotate; | |||
17325 | ||||
17326 | // Use dedicated unpack instructions for masks that match their pattern. | |||
17327 | if (SDValue V = lowerShuffleWithUNPCK(DL, MVT::v4i64, Mask, V1, V2, DAG)) | |||
17328 | return V; | |||
17329 | ||||
17330 | // If we have one input in place, then we can permute the other input and | |||
17331 | // blend the result. | |||
17332 | if (isShuffleMaskInputInPlace(0, Mask) || isShuffleMaskInputInPlace(1, Mask)) | |||
17333 | return lowerShuffleAsDecomposedShuffleMerge(DL, MVT::v4i64, V1, V2, Mask, | |||
17334 | Subtarget, DAG); | |||
17335 | ||||
17336 | // Try to create an in-lane repeating shuffle mask and then shuffle the | |||
17337 | // results into the target lanes. | |||
17338 | if (SDValue V = lowerShuffleAsRepeatedMaskAndLanePermute( | |||
17339 | DL, MVT::v4i64, V1, V2, Mask, Subtarget, DAG)) | |||
17340 | return V; | |||
17341 | ||||
17342 | // Try to simplify this by merging 128-bit lanes to enable a lane-based | |||
17343 | // shuffle. However, if we have AVX2 and either inputs are already in place, | |||
17344 | // we will be able to shuffle even across lanes the other input in a single | |||
17345 | // instruction so skip this pattern. | |||
17346 | if (!isShuffleMaskInputInPlace(0, Mask) && | |||
17347 | !isShuffleMaskInputInPlace(1, Mask)) | |||
17348 | if (SDValue Result = lowerShuffleAsLanePermuteAndRepeatedMask( | |||
17349 | DL, MVT::v4i64, V1, V2, Mask, Subtarget, DAG)) | |||
17350 | return Result; | |||
17351 | ||||
17352 | // Otherwise fall back on generic blend lowering. | |||
17353 | return lowerShuffleAsDecomposedShuffleMerge(DL, MVT::v4i64, V1, V2, Mask, | |||
17354 | Subtarget, DAG); | |||
17355 | } | |||
17356 | ||||
17357 | /// Handle lowering of 8-lane 32-bit floating point shuffles. | |||
17358 | /// | |||
17359 | /// Also ends up handling lowering of 8-lane 32-bit integer shuffles when AVX2 | |||
17360 | /// isn't available. | |||
17361 | static SDValue lowerV8F32Shuffle(const SDLoc &DL, ArrayRef<int> Mask, | |||
17362 | const APInt &Zeroable, SDValue V1, SDValue V2, | |||
17363 | const X86Subtarget &Subtarget, | |||
17364 | SelectionDAG &DAG) { | |||
17365 | assert(V1.getSimpleValueType() == MVT::v8f32 && "Bad operand type!")(static_cast <bool> (V1.getSimpleValueType() == MVT::v8f32 && "Bad operand type!") ? void (0) : __assert_fail ( "V1.getSimpleValueType() == MVT::v8f32 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17365, __extension__ __PRETTY_FUNCTION__)); | |||
| ||||
17366 | assert(V2.getSimpleValueType() == MVT::v8f32 && "Bad operand type!")(static_cast <bool> (V2.getSimpleValueType() == MVT::v8f32 && "Bad operand type!") ? void (0) : __assert_fail ( "V2.getSimpleValueType() == MVT::v8f32 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17366, __extension__ __PRETTY_FUNCTION__)); | |||
17367 | assert(Mask.size() == 8 && "Unexpected mask size for v8 shuffle!")(static_cast <bool> (Mask.size() == 8 && "Unexpected mask size for v8 shuffle!" ) ? void (0) : __assert_fail ("Mask.size() == 8 && \"Unexpected mask size for v8 shuffle!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17367, __extension__ __PRETTY_FUNCTION__)); | |||
17368 | ||||
17369 | if (SDValue Blend = lowerShuffleAsBlend(DL, MVT::v8f32, V1, V2, Mask, | |||
17370 | Zeroable, Subtarget, DAG)) | |||
17371 | return Blend; | |||
17372 | ||||
17373 | // Check for being able to broadcast a single element. | |||
17374 | if (SDValue Broadcast = lowerShuffleAsBroadcast(DL, MVT::v8f32, V1, V2, Mask, | |||
17375 | Subtarget, DAG)) | |||
17376 | return Broadcast; | |||
17377 | ||||
17378 | // If the shuffle mask is repeated in each 128-bit lane, we have many more | |||
17379 | // options to efficiently lower the shuffle. | |||
17380 | SmallVector<int, 4> RepeatedMask; | |||
17381 | if (is128BitLaneRepeatedShuffleMask(MVT::v8f32, Mask, RepeatedMask)) { | |||
17382 | assert(RepeatedMask.size() == 4 &&(static_cast <bool> (RepeatedMask.size() == 4 && "Repeated masks must be half the mask width!") ? void (0) : __assert_fail ("RepeatedMask.size() == 4 && \"Repeated masks must be half the mask width!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17383, __extension__ __PRETTY_FUNCTION__)) | |||
17383 | "Repeated masks must be half the mask width!")(static_cast <bool> (RepeatedMask.size() == 4 && "Repeated masks must be half the mask width!") ? void (0) : __assert_fail ("RepeatedMask.size() == 4 && \"Repeated masks must be half the mask width!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17383, __extension__ __PRETTY_FUNCTION__)); | |||
17384 | ||||
17385 | // Use even/odd duplicate instructions for masks that match their pattern. | |||
17386 | if (isShuffleEquivalent(RepeatedMask, {0, 0, 2, 2}, V1, V2)) | |||
17387 | return DAG.getNode(X86ISD::MOVSLDUP, DL, MVT::v8f32, V1); | |||
17388 | if (isShuffleEquivalent(RepeatedMask, {1, 1, 3, 3}, V1, V2)) | |||
17389 | return DAG.getNode(X86ISD::MOVSHDUP, DL, MVT::v8f32, V1); | |||
17390 | ||||
17391 | if (V2.isUndef()) | |||
17392 | return DAG.getNode(X86ISD::VPERMILPI, DL, MVT::v8f32, V1, | |||
17393 | getV4X86ShuffleImm8ForMask(RepeatedMask, DL, DAG)); | |||
17394 | ||||
17395 | // Use dedicated unpack instructions for masks that match their pattern. | |||
17396 | if (SDValue V = lowerShuffleWithUNPCK(DL, MVT::v8f32, Mask, V1, V2, DAG)) | |||
17397 | return V; | |||
17398 | ||||
17399 | // Otherwise, fall back to a SHUFPS sequence. Here it is important that we | |||
17400 | // have already handled any direct blends. | |||
17401 | return lowerShuffleWithSHUFPS(DL, MVT::v8f32, RepeatedMask, V1, V2, DAG); | |||
17402 | } | |||
17403 | ||||
17404 | // Try to create an in-lane repeating shuffle mask and then shuffle the | |||
17405 | // results into the target lanes. | |||
17406 | if (SDValue V = lowerShuffleAsRepeatedMaskAndLanePermute( | |||
17407 | DL, MVT::v8f32, V1, V2, Mask, Subtarget, DAG)) | |||
17408 | return V; | |||
17409 | ||||
17410 | // If we have a single input shuffle with different shuffle patterns in the | |||
17411 | // two 128-bit lanes use the variable mask to VPERMILPS. | |||
17412 | if (V2.isUndef()) { | |||
17413 | if (!is128BitLaneCrossingShuffleMask(MVT::v8f32, Mask)) { | |||
17414 | SDValue VPermMask = getConstVector(Mask, MVT::v8i32, DAG, DL, true); | |||
17415 | return DAG.getNode(X86ISD::VPERMILPV, DL, MVT::v8f32, V1, VPermMask); | |||
17416 | } | |||
17417 | if (Subtarget.hasAVX2()) { | |||
17418 | SDValue VPermMask = getConstVector(Mask, MVT::v8i32, DAG, DL, true); | |||
17419 | return DAG.getNode(X86ISD::VPERMV, DL, MVT::v8f32, VPermMask, V1); | |||
17420 | } | |||
17421 | // Otherwise, fall back. | |||
17422 | return lowerShuffleAsLanePermuteAndShuffle(DL, MVT::v8f32, V1, V2, Mask, | |||
17423 | DAG, Subtarget); | |||
17424 | } | |||
17425 | ||||
17426 | // Try to simplify this by merging 128-bit lanes to enable a lane-based | |||
17427 | // shuffle. | |||
17428 | if (SDValue Result = lowerShuffleAsLanePermuteAndRepeatedMask( | |||
17429 | DL, MVT::v8f32, V1, V2, Mask, Subtarget, DAG)) | |||
17430 | return Result; | |||
17431 | ||||
17432 | // If we have VLX support, we can use VEXPAND. | |||
17433 | if (Subtarget.hasVLX()) | |||
17434 | if (SDValue V = lowerShuffleToEXPAND(DL, MVT::v8f32, Zeroable, Mask, V1, V2, | |||
17435 | DAG, Subtarget)) | |||
17436 | return V; | |||
17437 | ||||
17438 | // For non-AVX512 if the Mask is of 16bit elements in lane then try to split | |||
17439 | // since after split we get a more efficient code using vpunpcklwd and | |||
17440 | // vpunpckhwd instrs than vblend. | |||
17441 | if (!Subtarget.hasAVX512() && isUnpackWdShuffleMask(Mask, MVT::v8f32)) | |||
17442 | return lowerShuffleAsSplitOrBlend(DL, MVT::v8f32, V1, V2, Mask, Subtarget, | |||
17443 | DAG); | |||
17444 | ||||
17445 | // If we have AVX2 then we always want to lower with a blend because at v8 we | |||
17446 | // can fully permute the elements. | |||
17447 | if (Subtarget.hasAVX2()) | |||
17448 | return lowerShuffleAsDecomposedShuffleMerge(DL, MVT::v8f32, V1, V2, Mask, | |||
17449 | Subtarget, DAG); | |||
17450 | ||||
17451 | // Otherwise fall back on generic lowering. | |||
17452 | return lowerShuffleAsSplitOrBlend(DL, MVT::v8f32, V1, V2, Mask, | |||
17453 | Subtarget, DAG); | |||
17454 | } | |||
17455 | ||||
17456 | /// Handle lowering of 8-lane 32-bit integer shuffles. | |||
17457 | /// | |||
17458 | /// This routine is only called when we have AVX2 and thus a reasonable | |||
17459 | /// instruction set for v8i32 shuffling.. | |||
17460 | static SDValue lowerV8I32Shuffle(const SDLoc &DL, ArrayRef<int> Mask, | |||
17461 | const APInt &Zeroable, SDValue V1, SDValue V2, | |||
17462 | const X86Subtarget &Subtarget, | |||
17463 | SelectionDAG &DAG) { | |||
17464 | assert(V1.getSimpleValueType() == MVT::v8i32 && "Bad operand type!")(static_cast <bool> (V1.getSimpleValueType() == MVT::v8i32 && "Bad operand type!") ? void (0) : __assert_fail ( "V1.getSimpleValueType() == MVT::v8i32 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17464, __extension__ __PRETTY_FUNCTION__)); | |||
17465 | assert(V2.getSimpleValueType() == MVT::v8i32 && "Bad operand type!")(static_cast <bool> (V2.getSimpleValueType() == MVT::v8i32 && "Bad operand type!") ? void (0) : __assert_fail ( "V2.getSimpleValueType() == MVT::v8i32 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17465, __extension__ __PRETTY_FUNCTION__)); | |||
17466 | assert(Mask.size() == 8 && "Unexpected mask size for v8 shuffle!")(static_cast <bool> (Mask.size() == 8 && "Unexpected mask size for v8 shuffle!" ) ? void (0) : __assert_fail ("Mask.size() == 8 && \"Unexpected mask size for v8 shuffle!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17466, __extension__ __PRETTY_FUNCTION__)); | |||
17467 | assert(Subtarget.hasAVX2() && "We can only lower v8i32 with AVX2!")(static_cast <bool> (Subtarget.hasAVX2() && "We can only lower v8i32 with AVX2!" ) ? void (0) : __assert_fail ("Subtarget.hasAVX2() && \"We can only lower v8i32 with AVX2!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17467, __extension__ __PRETTY_FUNCTION__)); | |||
17468 | ||||
17469 | // Whenever we can lower this as a zext, that instruction is strictly faster | |||
17470 | // than any alternative. It also allows us to fold memory operands into the | |||
17471 | // shuffle in many cases. | |||
17472 | if (SDValue ZExt = lowerShuffleAsZeroOrAnyExtend(DL, MVT::v8i32, V1, V2, Mask, | |||
17473 | Zeroable, Subtarget, DAG)) | |||
17474 | return ZExt; | |||
17475 | ||||
17476 | // For non-AVX512 if the Mask is of 16bit elements in lane then try to split | |||
17477 | // since after split we get a more efficient code than vblend by using | |||
17478 | // vpunpcklwd and vpunpckhwd instrs. | |||
17479 | if (isUnpackWdShuffleMask(Mask, MVT::v8i32) && !V2.isUndef() && | |||
17480 | !Subtarget.hasAVX512()) | |||
17481 | return lowerShuffleAsSplitOrBlend(DL, MVT::v8i32, V1, V2, Mask, Subtarget, | |||
17482 | DAG); | |||
17483 | ||||
17484 | if (SDValue Blend = lowerShuffleAsBlend(DL, MVT::v8i32, V1, V2, Mask, | |||
17485 | Zeroable, Subtarget, DAG)) | |||
17486 | return Blend; | |||
17487 | ||||
17488 | // Check for being able to broadcast a single element. | |||
17489 | if (SDValue Broadcast = lowerShuffleAsBroadcast(DL, MVT::v8i32, V1, V2, Mask, | |||
17490 | Subtarget, DAG)) | |||
17491 | return Broadcast; | |||
17492 | ||||
17493 | // If the shuffle mask is repeated in each 128-bit lane we can use more | |||
17494 | // efficient instructions that mirror the shuffles across the two 128-bit | |||
17495 | // lanes. | |||
17496 | SmallVector<int, 4> RepeatedMask; | |||
17497 | bool Is128BitLaneRepeatedShuffle = | |||
17498 | is128BitLaneRepeatedShuffleMask(MVT::v8i32, Mask, RepeatedMask); | |||
17499 | if (Is128BitLaneRepeatedShuffle) { | |||
17500 | assert(RepeatedMask.size() == 4 && "Unexpected repeated mask size!")(static_cast <bool> (RepeatedMask.size() == 4 && "Unexpected repeated mask size!") ? void (0) : __assert_fail ("RepeatedMask.size() == 4 && \"Unexpected repeated mask size!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17500, __extension__ __PRETTY_FUNCTION__)); | |||
17501 | if (V2.isUndef()) | |||
17502 | return DAG.getNode(X86ISD::PSHUFD, DL, MVT::v8i32, V1, | |||
17503 | getV4X86ShuffleImm8ForMask(RepeatedMask, DL, DAG)); | |||
17504 | ||||
17505 | // Use dedicated unpack instructions for masks that match their pattern. | |||
17506 | if (SDValue V = lowerShuffleWithUNPCK(DL, MVT::v8i32, Mask, V1, V2, DAG)) | |||
17507 | return V; | |||
17508 | } | |||
17509 | ||||
17510 | // Try to use shift instructions. | |||
17511 | if (SDValue Shift = lowerShuffleAsShift(DL, MVT::v8i32, V1, V2, Mask, | |||
17512 | Zeroable, Subtarget, DAG)) | |||
17513 | return Shift; | |||
17514 | ||||
17515 | // If we have VLX support, we can use VALIGN or EXPAND. | |||
17516 | if (Subtarget.hasVLX()) { | |||
17517 | if (SDValue Rotate = lowerShuffleAsVALIGN(DL, MVT::v8i32, V1, V2, Mask, | |||
17518 | Subtarget, DAG)) | |||
17519 | return Rotate; | |||
17520 | ||||
17521 | if (SDValue V = lowerShuffleToEXPAND(DL, MVT::v8i32, Zeroable, Mask, V1, V2, | |||
17522 | DAG, Subtarget)) | |||
17523 | return V; | |||
17524 | } | |||
17525 | ||||
17526 | // Try to use byte rotation instructions. | |||
17527 | if (SDValue Rotate = lowerShuffleAsByteRotate(DL, MVT::v8i32, V1, V2, Mask, | |||
17528 | Subtarget, DAG)) | |||
17529 | return Rotate; | |||
17530 | ||||
17531 | // Try to create an in-lane repeating shuffle mask and then shuffle the | |||
17532 | // results into the target lanes. | |||
17533 | if (SDValue V = lowerShuffleAsRepeatedMaskAndLanePermute( | |||
17534 | DL, MVT::v8i32, V1, V2, Mask, Subtarget, DAG)) | |||
17535 | return V; | |||
17536 | ||||
17537 | if (V2.isUndef()) { | |||
17538 | // Try to produce a fixed cross-128-bit lane permute followed by unpack | |||
17539 | // because that should be faster than the variable permute alternatives. | |||
17540 | if (SDValue V = lowerShuffleWithUNPCK256(DL, MVT::v8i32, Mask, V1, V2, DAG)) | |||
17541 | return V; | |||
17542 | ||||
17543 | // If the shuffle patterns aren't repeated but it's a single input, directly | |||
17544 | // generate a cross-lane VPERMD instruction. | |||
17545 | SDValue VPermMask = getConstVector(Mask, MVT::v8i32, DAG, DL, true); | |||
17546 | return DAG.getNode(X86ISD::VPERMV, DL, MVT::v8i32, VPermMask, V1); | |||
17547 | } | |||
17548 | ||||
17549 | // Assume that a single SHUFPS is faster than an alternative sequence of | |||
17550 | // multiple instructions (even if the CPU has a domain penalty). | |||
17551 | // If some CPU is harmed by the domain switch, we can fix it in a later pass. | |||
17552 | if (Is128BitLaneRepeatedShuffle && isSingleSHUFPSMask(RepeatedMask)) { | |||
17553 | SDValue CastV1 = DAG.getBitcast(MVT::v8f32, V1); | |||
17554 | SDValue CastV2 = DAG.getBitcast(MVT::v8f32, V2); | |||
17555 | SDValue ShufPS = lowerShuffleWithSHUFPS(DL, MVT::v8f32, RepeatedMask, | |||
17556 | CastV1, CastV2, DAG); | |||
17557 | return DAG.getBitcast(MVT::v8i32, ShufPS); | |||
17558 | } | |||
17559 | ||||
17560 | // Try to simplify this by merging 128-bit lanes to enable a lane-based | |||
17561 | // shuffle. | |||
17562 | if (SDValue Result = lowerShuffleAsLanePermuteAndRepeatedMask( | |||
17563 | DL, MVT::v8i32, V1, V2, Mask, Subtarget, DAG)) | |||
17564 | return Result; | |||
17565 | ||||
17566 | // Otherwise fall back on generic blend lowering. | |||
17567 | return lowerShuffleAsDecomposedShuffleMerge(DL, MVT::v8i32, V1, V2, Mask, | |||
17568 | Subtarget, DAG); | |||
17569 | } | |||
17570 | ||||
17571 | /// Handle lowering of 16-lane 16-bit integer shuffles. | |||
17572 | /// | |||
17573 | /// This routine is only called when we have AVX2 and thus a reasonable | |||
17574 | /// instruction set for v16i16 shuffling.. | |||
17575 | static SDValue lowerV16I16Shuffle(const SDLoc &DL, ArrayRef<int> Mask, | |||
17576 | const APInt &Zeroable, SDValue V1, SDValue V2, | |||
17577 | const X86Subtarget &Subtarget, | |||
17578 | SelectionDAG &DAG) { | |||
17579 | assert(V1.getSimpleValueType() == MVT::v16i16 && "Bad operand type!")(static_cast <bool> (V1.getSimpleValueType() == MVT::v16i16 && "Bad operand type!") ? void (0) : __assert_fail ( "V1.getSimpleValueType() == MVT::v16i16 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17579, __extension__ __PRETTY_FUNCTION__)); | |||
17580 | assert(V2.getSimpleValueType() == MVT::v16i16 && "Bad operand type!")(static_cast <bool> (V2.getSimpleValueType() == MVT::v16i16 && "Bad operand type!") ? void (0) : __assert_fail ( "V2.getSimpleValueType() == MVT::v16i16 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17580, __extension__ __PRETTY_FUNCTION__)); | |||
17581 | assert(Mask.size() == 16 && "Unexpected mask size for v16 shuffle!")(static_cast <bool> (Mask.size() == 16 && "Unexpected mask size for v16 shuffle!" ) ? void (0) : __assert_fail ("Mask.size() == 16 && \"Unexpected mask size for v16 shuffle!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17581, __extension__ __PRETTY_FUNCTION__)); | |||
17582 | assert(Subtarget.hasAVX2() && "We can only lower v16i16 with AVX2!")(static_cast <bool> (Subtarget.hasAVX2() && "We can only lower v16i16 with AVX2!" ) ? void (0) : __assert_fail ("Subtarget.hasAVX2() && \"We can only lower v16i16 with AVX2!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17582, __extension__ __PRETTY_FUNCTION__)); | |||
17583 | ||||
17584 | // Whenever we can lower this as a zext, that instruction is strictly faster | |||
17585 | // than any alternative. It also allows us to fold memory operands into the | |||
17586 | // shuffle in many cases. | |||
17587 | if (SDValue ZExt = lowerShuffleAsZeroOrAnyExtend( | |||
17588 | DL, MVT::v16i16, V1, V2, Mask, Zeroable, Subtarget, DAG)) | |||
17589 | return ZExt; | |||
17590 | ||||
17591 | // Check for being able to broadcast a single element. | |||
17592 | if (SDValue Broadcast = lowerShuffleAsBroadcast(DL, MVT::v16i16, V1, V2, Mask, | |||
17593 | Subtarget, DAG)) | |||
17594 | return Broadcast; | |||
17595 | ||||
17596 | if (SDValue Blend = lowerShuffleAsBlend(DL, MVT::v16i16, V1, V2, Mask, | |||
17597 | Zeroable, Subtarget, DAG)) | |||
17598 | return Blend; | |||
17599 | ||||
17600 | // Use dedicated unpack instructions for masks that match their pattern. | |||
17601 | if (SDValue V = lowerShuffleWithUNPCK(DL, MVT::v16i16, Mask, V1, V2, DAG)) | |||
17602 | return V; | |||
17603 | ||||
17604 | // Use dedicated pack instructions for masks that match their pattern. | |||
17605 | if (SDValue V = lowerShuffleWithPACK(DL, MVT::v16i16, Mask, V1, V2, DAG, | |||
17606 | Subtarget)) | |||
17607 | return V; | |||
17608 | ||||
17609 | // Try to use lower using a truncation. | |||
17610 | if (SDValue V = lowerShuffleAsVTRUNC(DL, MVT::v16i16, V1, V2, Mask, Zeroable, | |||
17611 | Subtarget, DAG)) | |||
17612 | return V; | |||
17613 | ||||
17614 | // Try to use shift instructions. | |||
17615 | if (SDValue Shift = lowerShuffleAsShift(DL, MVT::v16i16, V1, V2, Mask, | |||
17616 | Zeroable, Subtarget, DAG)) | |||
17617 | return Shift; | |||
17618 | ||||
17619 | // Try to use byte rotation instructions. | |||
17620 | if (SDValue Rotate = lowerShuffleAsByteRotate(DL, MVT::v16i16, V1, V2, Mask, | |||
17621 | Subtarget, DAG)) | |||
17622 | return Rotate; | |||
17623 | ||||
17624 | // Try to create an in-lane repeating shuffle mask and then shuffle the | |||
17625 | // results into the target lanes. | |||
17626 | if (SDValue V = lowerShuffleAsRepeatedMaskAndLanePermute( | |||
17627 | DL, MVT::v16i16, V1, V2, Mask, Subtarget, DAG)) | |||
17628 | return V; | |||
17629 | ||||
17630 | if (V2.isUndef()) { | |||
17631 | // Try to use bit rotation instructions. | |||
17632 | if (SDValue Rotate = | |||
17633 | lowerShuffleAsBitRotate(DL, MVT::v16i16, V1, Mask, Subtarget, DAG)) | |||
17634 | return Rotate; | |||
17635 | ||||
17636 | // Try to produce a fixed cross-128-bit lane permute followed by unpack | |||
17637 | // because that should be faster than the variable permute alternatives. | |||
17638 | if (SDValue V = lowerShuffleWithUNPCK256(DL, MVT::v16i16, Mask, V1, V2, DAG)) | |||
17639 | return V; | |||
17640 | ||||
17641 | // There are no generalized cross-lane shuffle operations available on i16 | |||
17642 | // element types. | |||
17643 | if (is128BitLaneCrossingShuffleMask(MVT::v16i16, Mask)) { | |||
17644 | if (SDValue V = lowerShuffleAsLanePermuteAndPermute( | |||
17645 | DL, MVT::v16i16, V1, V2, Mask, DAG, Subtarget)) | |||
17646 | return V; | |||
17647 | ||||
17648 | return lowerShuffleAsLanePermuteAndShuffle(DL, MVT::v16i16, V1, V2, Mask, | |||
17649 | DAG, Subtarget); | |||
17650 | } | |||
17651 | ||||
17652 | SmallVector<int, 8> RepeatedMask; | |||
17653 | if (is128BitLaneRepeatedShuffleMask(MVT::v16i16, Mask, RepeatedMask)) { | |||
17654 | // As this is a single-input shuffle, the repeated mask should be | |||
17655 | // a strictly valid v8i16 mask that we can pass through to the v8i16 | |||
17656 | // lowering to handle even the v16 case. | |||
17657 | return lowerV8I16GeneralSingleInputShuffle( | |||
17658 | DL, MVT::v16i16, V1, RepeatedMask, Subtarget, DAG); | |||
17659 | } | |||
17660 | } | |||
17661 | ||||
17662 | if (SDValue PSHUFB = lowerShuffleWithPSHUFB(DL, MVT::v16i16, Mask, V1, V2, | |||
17663 | Zeroable, Subtarget, DAG)) | |||
17664 | return PSHUFB; | |||
17665 | ||||
17666 | // AVX512BW can lower to VPERMW (non-VLX will pad to v32i16). | |||
17667 | if (Subtarget.hasBWI()) | |||
17668 | return lowerShuffleWithPERMV(DL, MVT::v16i16, Mask, V1, V2, Subtarget, DAG); | |||
17669 | ||||
17670 | // Try to simplify this by merging 128-bit lanes to enable a lane-based | |||
17671 | // shuffle. | |||
17672 | if (SDValue Result = lowerShuffleAsLanePermuteAndRepeatedMask( | |||
17673 | DL, MVT::v16i16, V1, V2, Mask, Subtarget, DAG)) | |||
17674 | return Result; | |||
17675 | ||||
17676 | // Try to permute the lanes and then use a per-lane permute. | |||
17677 | if (SDValue V = lowerShuffleAsLanePermuteAndPermute( | |||
17678 | DL, MVT::v16i16, V1, V2, Mask, DAG, Subtarget)) | |||
17679 | return V; | |||
17680 | ||||
17681 | // Otherwise fall back on generic lowering. | |||
17682 | return lowerShuffleAsSplitOrBlend(DL, MVT::v16i16, V1, V2, Mask, | |||
17683 | Subtarget, DAG); | |||
17684 | } | |||
17685 | ||||
17686 | /// Handle lowering of 32-lane 8-bit integer shuffles. | |||
17687 | /// | |||
17688 | /// This routine is only called when we have AVX2 and thus a reasonable | |||
17689 | /// instruction set for v32i8 shuffling.. | |||
17690 | static SDValue lowerV32I8Shuffle(const SDLoc &DL, ArrayRef<int> Mask, | |||
17691 | const APInt &Zeroable, SDValue V1, SDValue V2, | |||
17692 | const X86Subtarget &Subtarget, | |||
17693 | SelectionDAG &DAG) { | |||
17694 | assert(V1.getSimpleValueType() == MVT::v32i8 && "Bad operand type!")(static_cast <bool> (V1.getSimpleValueType() == MVT::v32i8 && "Bad operand type!") ? void (0) : __assert_fail ( "V1.getSimpleValueType() == MVT::v32i8 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17694, __extension__ __PRETTY_FUNCTION__)); | |||
17695 | assert(V2.getSimpleValueType() == MVT::v32i8 && "Bad operand type!")(static_cast <bool> (V2.getSimpleValueType() == MVT::v32i8 && "Bad operand type!") ? void (0) : __assert_fail ( "V2.getSimpleValueType() == MVT::v32i8 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17695, __extension__ __PRETTY_FUNCTION__)); | |||
17696 | assert(Mask.size() == 32 && "Unexpected mask size for v32 shuffle!")(static_cast <bool> (Mask.size() == 32 && "Unexpected mask size for v32 shuffle!" ) ? void (0) : __assert_fail ("Mask.size() == 32 && \"Unexpected mask size for v32 shuffle!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17696, __extension__ __PRETTY_FUNCTION__)); | |||
17697 | assert(Subtarget.hasAVX2() && "We can only lower v32i8 with AVX2!")(static_cast <bool> (Subtarget.hasAVX2() && "We can only lower v32i8 with AVX2!" ) ? void (0) : __assert_fail ("Subtarget.hasAVX2() && \"We can only lower v32i8 with AVX2!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17697, __extension__ __PRETTY_FUNCTION__)); | |||
17698 | ||||
17699 | // Whenever we can lower this as a zext, that instruction is strictly faster | |||
17700 | // than any alternative. It also allows us to fold memory operands into the | |||
17701 | // shuffle in many cases. | |||
17702 | if (SDValue ZExt = lowerShuffleAsZeroOrAnyExtend(DL, MVT::v32i8, V1, V2, Mask, | |||
17703 | Zeroable, Subtarget, DAG)) | |||
17704 | return ZExt; | |||
17705 | ||||
17706 | // Check for being able to broadcast a single element. | |||
17707 | if (SDValue Broadcast = lowerShuffleAsBroadcast(DL, MVT::v32i8, V1, V2, Mask, | |||
17708 | Subtarget, DAG)) | |||
17709 | return Broadcast; | |||
17710 | ||||
17711 | if (SDValue Blend = lowerShuffleAsBlend(DL, MVT::v32i8, V1, V2, Mask, | |||
17712 | Zeroable, Subtarget, DAG)) | |||
17713 | return Blend; | |||
17714 | ||||
17715 | // Use dedicated unpack instructions for masks that match their pattern. | |||
17716 | if (SDValue V = lowerShuffleWithUNPCK(DL, MVT::v32i8, Mask, V1, V2, DAG)) | |||
17717 | return V; | |||
17718 | ||||
17719 | // Use dedicated pack instructions for masks that match their pattern. | |||
17720 | if (SDValue V = lowerShuffleWithPACK(DL, MVT::v32i8, Mask, V1, V2, DAG, | |||
17721 | Subtarget)) | |||
17722 | return V; | |||
17723 | ||||
17724 | // Try to use lower using a truncation. | |||
17725 | if (SDValue V = lowerShuffleAsVTRUNC(DL, MVT::v32i8, V1, V2, Mask, Zeroable, | |||
17726 | Subtarget, DAG)) | |||
17727 | return V; | |||
17728 | ||||
17729 | // Try to use shift instructions. | |||
17730 | if (SDValue Shift = lowerShuffleAsShift(DL, MVT::v32i8, V1, V2, Mask, | |||
17731 | Zeroable, Subtarget, DAG)) | |||
17732 | return Shift; | |||
17733 | ||||
17734 | // Try to use byte rotation instructions. | |||
17735 | if (SDValue Rotate = lowerShuffleAsByteRotate(DL, MVT::v32i8, V1, V2, Mask, | |||
17736 | Subtarget, DAG)) | |||
17737 | return Rotate; | |||
17738 | ||||
17739 | // Try to use bit rotation instructions. | |||
17740 | if (V2.isUndef()) | |||
17741 | if (SDValue Rotate = | |||
17742 | lowerShuffleAsBitRotate(DL, MVT::v32i8, V1, Mask, Subtarget, DAG)) | |||
17743 | return Rotate; | |||
17744 | ||||
17745 | // Try to create an in-lane repeating shuffle mask and then shuffle the | |||
17746 | // results into the target lanes. | |||
17747 | if (SDValue V = lowerShuffleAsRepeatedMaskAndLanePermute( | |||
17748 | DL, MVT::v32i8, V1, V2, Mask, Subtarget, DAG)) | |||
17749 | return V; | |||
17750 | ||||
17751 | // There are no generalized cross-lane shuffle operations available on i8 | |||
17752 | // element types. | |||
17753 | if (V2.isUndef() && is128BitLaneCrossingShuffleMask(MVT::v32i8, Mask)) { | |||
17754 | // Try to produce a fixed cross-128-bit lane permute followed by unpack | |||
17755 | // because that should be faster than the variable permute alternatives. | |||
17756 | if (SDValue V = lowerShuffleWithUNPCK256(DL, MVT::v32i8, Mask, V1, V2, DAG)) | |||
17757 | return V; | |||
17758 | ||||
17759 | if (SDValue V = lowerShuffleAsLanePermuteAndPermute( | |||
17760 | DL, MVT::v32i8, V1, V2, Mask, DAG, Subtarget)) | |||
17761 | return V; | |||
17762 | ||||
17763 | return lowerShuffleAsLanePermuteAndShuffle(DL, MVT::v32i8, V1, V2, Mask, | |||
17764 | DAG, Subtarget); | |||
17765 | } | |||
17766 | ||||
17767 | if (SDValue PSHUFB = lowerShuffleWithPSHUFB(DL, MVT::v32i8, Mask, V1, V2, | |||
17768 | Zeroable, Subtarget, DAG)) | |||
17769 | return PSHUFB; | |||
17770 | ||||
17771 | // AVX512VBMI can lower to VPERMB (non-VLX will pad to v64i8). | |||
17772 | if (Subtarget.hasVBMI()) | |||
17773 | return lowerShuffleWithPERMV(DL, MVT::v32i8, Mask, V1, V2, Subtarget, DAG); | |||
17774 | ||||
17775 | // Try to simplify this by merging 128-bit lanes to enable a lane-based | |||
17776 | // shuffle. | |||
17777 | if (SDValue Result = lowerShuffleAsLanePermuteAndRepeatedMask( | |||
17778 | DL, MVT::v32i8, V1, V2, Mask, Subtarget, DAG)) | |||
17779 | return Result; | |||
17780 | ||||
17781 | // Try to permute the lanes and then use a per-lane permute. | |||
17782 | if (SDValue V = lowerShuffleAsLanePermuteAndPermute( | |||
17783 | DL, MVT::v32i8, V1, V2, Mask, DAG, Subtarget)) | |||
17784 | return V; | |||
17785 | ||||
17786 | // Look for {0, 8, 16, 24, 32, 40, 48, 56 } in the first 8 elements. Followed | |||
17787 | // by zeroable elements in the remaining 24 elements. Turn this into two | |||
17788 | // vmovqb instructions shuffled together. | |||
17789 | if (Subtarget.hasVLX()) | |||
17790 | if (SDValue V = lowerShuffleAsVTRUNCAndUnpack(DL, MVT::v32i8, V1, V2, | |||
17791 | Mask, Zeroable, DAG)) | |||
17792 | return V; | |||
17793 | ||||
17794 | // Otherwise fall back on generic lowering. | |||
17795 | return lowerShuffleAsSplitOrBlend(DL, MVT::v32i8, V1, V2, Mask, | |||
17796 | Subtarget, DAG); | |||
17797 | } | |||
17798 | ||||
17799 | /// High-level routine to lower various 256-bit x86 vector shuffles. | |||
17800 | /// | |||
17801 | /// This routine either breaks down the specific type of a 256-bit x86 vector | |||
17802 | /// shuffle or splits it into two 128-bit shuffles and fuses the results back | |||
17803 | /// together based on the available instructions. | |||
17804 | static SDValue lower256BitShuffle(const SDLoc &DL, ArrayRef<int> Mask, MVT VT, | |||
17805 | SDValue V1, SDValue V2, const APInt &Zeroable, | |||
17806 | const X86Subtarget &Subtarget, | |||
17807 | SelectionDAG &DAG) { | |||
17808 | // If we have a single input to the zero element, insert that into V1 if we | |||
17809 | // can do so cheaply. | |||
17810 | int NumElts = VT.getVectorNumElements(); | |||
17811 | int NumV2Elements = count_if(Mask, [NumElts](int M) { return M >= NumElts; }); | |||
17812 | ||||
17813 | if (NumV2Elements == 1 && Mask[0] >= NumElts) | |||
17814 | if (SDValue Insertion = lowerShuffleAsElementInsertion( | |||
17815 | DL, VT, V1, V2, Mask, Zeroable, Subtarget, DAG)) | |||
17816 | return Insertion; | |||
17817 | ||||
17818 | // Handle special cases where the lower or upper half is UNDEF. | |||
17819 | if (SDValue V = | |||
17820 | lowerShuffleWithUndefHalf(DL, VT, V1, V2, Mask, Subtarget, DAG)) | |||
17821 | return V; | |||
17822 | ||||
17823 | // There is a really nice hard cut-over between AVX1 and AVX2 that means we | |||
17824 | // can check for those subtargets here and avoid much of the subtarget | |||
17825 | // querying in the per-vector-type lowering routines. With AVX1 we have | |||
17826 | // essentially *zero* ability to manipulate a 256-bit vector with integer | |||
17827 | // types. Since we'll use floating point types there eventually, just | |||
17828 | // immediately cast everything to a float and operate entirely in that domain. | |||
17829 | if (VT.isInteger() && !Subtarget.hasAVX2()) { | |||
17830 | int ElementBits = VT.getScalarSizeInBits(); | |||
17831 | if (ElementBits < 32) { | |||
17832 | // No floating point type available, if we can't use the bit operations | |||
17833 | // for masking/blending then decompose into 128-bit vectors. | |||
17834 | if (SDValue V = lowerShuffleAsBitMask(DL, VT, V1, V2, Mask, Zeroable, | |||
17835 | Subtarget, DAG)) | |||
17836 | return V; | |||
17837 | if (SDValue V = lowerShuffleAsBitBlend(DL, VT, V1, V2, Mask, DAG)) | |||
17838 | return V; | |||
17839 | return splitAndLowerShuffle(DL, VT, V1, V2, Mask, DAG); | |||
17840 | } | |||
17841 | ||||
17842 | MVT FpVT = MVT::getVectorVT(MVT::getFloatingPointVT(ElementBits), | |||
17843 | VT.getVectorNumElements()); | |||
17844 | V1 = DAG.getBitcast(FpVT, V1); | |||
17845 | V2 = DAG.getBitcast(FpVT, V2); | |||
17846 | return DAG.getBitcast(VT, DAG.getVectorShuffle(FpVT, DL, V1, V2, Mask)); | |||
17847 | } | |||
17848 | ||||
17849 | if (VT == MVT::v16f16) { | |||
17850 | V1 = DAG.getBitcast(MVT::v16i16, V1); | |||
17851 | V2 = DAG.getBitcast(MVT::v16i16, V2); | |||
17852 | return DAG.getBitcast(MVT::v16f16, | |||
17853 | DAG.getVectorShuffle(MVT::v16i16, DL, V1, V2, Mask)); | |||
17854 | } | |||
17855 | ||||
17856 | switch (VT.SimpleTy) { | |||
17857 | case MVT::v4f64: | |||
17858 | return lowerV4F64Shuffle(DL, Mask, Zeroable, V1, V2, Subtarget, DAG); | |||
17859 | case MVT::v4i64: | |||
17860 | return lowerV4I64Shuffle(DL, Mask, Zeroable, V1, V2, Subtarget, DAG); | |||
17861 | case MVT::v8f32: | |||
17862 | return lowerV8F32Shuffle(DL, Mask, Zeroable, V1, V2, Subtarget, DAG); | |||
17863 | case MVT::v8i32: | |||
17864 | return lowerV8I32Shuffle(DL, Mask, Zeroable, V1, V2, Subtarget, DAG); | |||
17865 | case MVT::v16i16: | |||
17866 | return lowerV16I16Shuffle(DL, Mask, Zeroable, V1, V2, Subtarget, DAG); | |||
17867 | case MVT::v32i8: | |||
17868 | return lowerV32I8Shuffle(DL, Mask, Zeroable, V1, V2, Subtarget, DAG); | |||
17869 | ||||
17870 | default: | |||
17871 | llvm_unreachable("Not a valid 256-bit x86 vector type!")::llvm::llvm_unreachable_internal("Not a valid 256-bit x86 vector type!" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17871); | |||
17872 | } | |||
17873 | } | |||
17874 | ||||
17875 | /// Try to lower a vector shuffle as a 128-bit shuffles. | |||
17876 | static SDValue lowerV4X128Shuffle(const SDLoc &DL, MVT VT, ArrayRef<int> Mask, | |||
17877 | const APInt &Zeroable, SDValue V1, SDValue V2, | |||
17878 | const X86Subtarget &Subtarget, | |||
17879 | SelectionDAG &DAG) { | |||
17880 | assert(VT.getScalarSizeInBits() == 64 &&(static_cast <bool> (VT.getScalarSizeInBits() == 64 && "Unexpected element type size for 128bit shuffle.") ? void ( 0) : __assert_fail ("VT.getScalarSizeInBits() == 64 && \"Unexpected element type size for 128bit shuffle.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17881, __extension__ __PRETTY_FUNCTION__)) | |||
17881 | "Unexpected element type size for 128bit shuffle.")(static_cast <bool> (VT.getScalarSizeInBits() == 64 && "Unexpected element type size for 128bit shuffle.") ? void ( 0) : __assert_fail ("VT.getScalarSizeInBits() == 64 && \"Unexpected element type size for 128bit shuffle.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17881, __extension__ __PRETTY_FUNCTION__)); | |||
17882 | ||||
17883 | // To handle 256 bit vector requires VLX and most probably | |||
17884 | // function lowerV2X128VectorShuffle() is better solution. | |||
17885 | assert(VT.is512BitVector() && "Unexpected vector size for 512bit shuffle.")(static_cast <bool> (VT.is512BitVector() && "Unexpected vector size for 512bit shuffle." ) ? void (0) : __assert_fail ("VT.is512BitVector() && \"Unexpected vector size for 512bit shuffle.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17885, __extension__ __PRETTY_FUNCTION__)); | |||
17886 | ||||
17887 | // TODO - use Zeroable like we do for lowerV2X128VectorShuffle? | |||
17888 | SmallVector<int, 4> Widened128Mask; | |||
17889 | if (!canWidenShuffleElements(Mask, Widened128Mask)) | |||
17890 | return SDValue(); | |||
17891 | assert(Widened128Mask.size() == 4 && "Shuffle widening mismatch")(static_cast <bool> (Widened128Mask.size() == 4 && "Shuffle widening mismatch") ? void (0) : __assert_fail ("Widened128Mask.size() == 4 && \"Shuffle widening mismatch\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17891, __extension__ __PRETTY_FUNCTION__)); | |||
17892 | ||||
17893 | // Try to use an insert into a zero vector. | |||
17894 | if (Widened128Mask[0] == 0 && (Zeroable & 0xf0) == 0xf0 && | |||
17895 | (Widened128Mask[1] == 1 || (Zeroable & 0x0c) == 0x0c)) { | |||
17896 | unsigned NumElts = ((Zeroable & 0x0c) == 0x0c) ? 2 : 4; | |||
17897 | MVT SubVT = MVT::getVectorVT(VT.getVectorElementType(), NumElts); | |||
17898 | SDValue LoV = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, SubVT, V1, | |||
17899 | DAG.getIntPtrConstant(0, DL)); | |||
17900 | return DAG.getNode(ISD::INSERT_SUBVECTOR, DL, VT, | |||
17901 | getZeroVector(VT, Subtarget, DAG, DL), LoV, | |||
17902 | DAG.getIntPtrConstant(0, DL)); | |||
17903 | } | |||
17904 | ||||
17905 | // Check for patterns which can be matched with a single insert of a 256-bit | |||
17906 | // subvector. | |||
17907 | bool OnlyUsesV1 = isShuffleEquivalent(Mask, {0, 1, 2, 3, 0, 1, 2, 3}, V1, V2); | |||
17908 | if (OnlyUsesV1 || | |||
17909 | isShuffleEquivalent(Mask, {0, 1, 2, 3, 8, 9, 10, 11}, V1, V2)) { | |||
17910 | MVT SubVT = MVT::getVectorVT(VT.getVectorElementType(), 4); | |||
17911 | SDValue SubVec = | |||
17912 | DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, SubVT, OnlyUsesV1 ? V1 : V2, | |||
17913 | DAG.getIntPtrConstant(0, DL)); | |||
17914 | return DAG.getNode(ISD::INSERT_SUBVECTOR, DL, VT, V1, SubVec, | |||
17915 | DAG.getIntPtrConstant(4, DL)); | |||
17916 | } | |||
17917 | ||||
17918 | // See if this is an insertion of the lower 128-bits of V2 into V1. | |||
17919 | bool IsInsert = true; | |||
17920 | int V2Index = -1; | |||
17921 | for (int i = 0; i < 4; ++i) { | |||
17922 | assert(Widened128Mask[i] >= -1 && "Illegal shuffle sentinel value")(static_cast <bool> (Widened128Mask[i] >= -1 && "Illegal shuffle sentinel value") ? void (0) : __assert_fail ("Widened128Mask[i] >= -1 && \"Illegal shuffle sentinel value\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17922, __extension__ __PRETTY_FUNCTION__)); | |||
17923 | if (Widened128Mask[i] < 0) | |||
17924 | continue; | |||
17925 | ||||
17926 | // Make sure all V1 subvectors are in place. | |||
17927 | if (Widened128Mask[i] < 4) { | |||
17928 | if (Widened128Mask[i] != i) { | |||
17929 | IsInsert = false; | |||
17930 | break; | |||
17931 | } | |||
17932 | } else { | |||
17933 | // Make sure we only have a single V2 index and its the lowest 128-bits. | |||
17934 | if (V2Index >= 0 || Widened128Mask[i] != 4) { | |||
17935 | IsInsert = false; | |||
17936 | break; | |||
17937 | } | |||
17938 | V2Index = i; | |||
17939 | } | |||
17940 | } | |||
17941 | if (IsInsert && V2Index >= 0) { | |||
17942 | MVT SubVT = MVT::getVectorVT(VT.getVectorElementType(), 2); | |||
17943 | SDValue Subvec = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, SubVT, V2, | |||
17944 | DAG.getIntPtrConstant(0, DL)); | |||
17945 | return insert128BitVector(V1, Subvec, V2Index * 2, DAG, DL); | |||
17946 | } | |||
17947 | ||||
17948 | // See if we can widen to a 256-bit lane shuffle, we're going to lose 128-lane | |||
17949 | // UNDEF info by lowering to X86ISD::SHUF128 anyway, so by widening where | |||
17950 | // possible we at least ensure the lanes stay sequential to help later | |||
17951 | // combines. | |||
17952 | SmallVector<int, 2> Widened256Mask; | |||
17953 | if (canWidenShuffleElements(Widened128Mask, Widened256Mask)) { | |||
17954 | Widened128Mask.clear(); | |||
17955 | narrowShuffleMaskElts(2, Widened256Mask, Widened128Mask); | |||
17956 | } | |||
17957 | ||||
17958 | // Try to lower to vshuf64x2/vshuf32x4. | |||
17959 | SDValue Ops[2] = {DAG.getUNDEF(VT), DAG.getUNDEF(VT)}; | |||
17960 | unsigned PermMask = 0; | |||
17961 | // Insure elements came from the same Op. | |||
17962 | for (int i = 0; i < 4; ++i) { | |||
17963 | assert(Widened128Mask[i] >= -1 && "Illegal shuffle sentinel value")(static_cast <bool> (Widened128Mask[i] >= -1 && "Illegal shuffle sentinel value") ? void (0) : __assert_fail ("Widened128Mask[i] >= -1 && \"Illegal shuffle sentinel value\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17963, __extension__ __PRETTY_FUNCTION__)); | |||
17964 | if (Widened128Mask[i] < 0) | |||
17965 | continue; | |||
17966 | ||||
17967 | SDValue Op = Widened128Mask[i] >= 4 ? V2 : V1; | |||
17968 | unsigned OpIndex = i / 2; | |||
17969 | if (Ops[OpIndex].isUndef()) | |||
17970 | Ops[OpIndex] = Op; | |||
17971 | else if (Ops[OpIndex] != Op) | |||
17972 | return SDValue(); | |||
17973 | ||||
17974 | // Convert the 128-bit shuffle mask selection values into 128-bit selection | |||
17975 | // bits defined by a vshuf64x2 instruction's immediate control byte. | |||
17976 | PermMask |= (Widened128Mask[i] % 4) << (i * 2); | |||
17977 | } | |||
17978 | ||||
17979 | return DAG.getNode(X86ISD::SHUF128, DL, VT, Ops[0], Ops[1], | |||
17980 | DAG.getTargetConstant(PermMask, DL, MVT::i8)); | |||
17981 | } | |||
17982 | ||||
17983 | /// Handle lowering of 8-lane 64-bit floating point shuffles. | |||
17984 | static SDValue lowerV8F64Shuffle(const SDLoc &DL, ArrayRef<int> Mask, | |||
17985 | const APInt &Zeroable, SDValue V1, SDValue V2, | |||
17986 | const X86Subtarget &Subtarget, | |||
17987 | SelectionDAG &DAG) { | |||
17988 | assert(V1.getSimpleValueType() == MVT::v8f64 && "Bad operand type!")(static_cast <bool> (V1.getSimpleValueType() == MVT::v8f64 && "Bad operand type!") ? void (0) : __assert_fail ( "V1.getSimpleValueType() == MVT::v8f64 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17988, __extension__ __PRETTY_FUNCTION__)); | |||
17989 | assert(V2.getSimpleValueType() == MVT::v8f64 && "Bad operand type!")(static_cast <bool> (V2.getSimpleValueType() == MVT::v8f64 && "Bad operand type!") ? void (0) : __assert_fail ( "V2.getSimpleValueType() == MVT::v8f64 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17989, __extension__ __PRETTY_FUNCTION__)); | |||
17990 | assert(Mask.size() == 8 && "Unexpected mask size for v8 shuffle!")(static_cast <bool> (Mask.size() == 8 && "Unexpected mask size for v8 shuffle!" ) ? void (0) : __assert_fail ("Mask.size() == 8 && \"Unexpected mask size for v8 shuffle!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 17990, __extension__ __PRETTY_FUNCTION__)); | |||
17991 | ||||
17992 | if (V2.isUndef()) { | |||
17993 | // Use low duplicate instructions for masks that match their pattern. | |||
17994 | if (isShuffleEquivalent(Mask, {0, 0, 2, 2, 4, 4, 6, 6}, V1, V2)) | |||
17995 | return DAG.getNode(X86ISD::MOVDDUP, DL, MVT::v8f64, V1); | |||
17996 | ||||
17997 | if (!is128BitLaneCrossingShuffleMask(MVT::v8f64, Mask)) { | |||
17998 | // Non-half-crossing single input shuffles can be lowered with an | |||
17999 | // interleaved permutation. | |||
18000 | unsigned VPERMILPMask = (Mask[0] == 1) | ((Mask[1] == 1) << 1) | | |||
18001 | ((Mask[2] == 3) << 2) | ((Mask[3] == 3) << 3) | | |||
18002 | ((Mask[4] == 5) << 4) | ((Mask[5] == 5) << 5) | | |||
18003 | ((Mask[6] == 7) << 6) | ((Mask[7] == 7) << 7); | |||
18004 | return DAG.getNode(X86ISD::VPERMILPI, DL, MVT::v8f64, V1, | |||
18005 | DAG.getTargetConstant(VPERMILPMask, DL, MVT::i8)); | |||
18006 | } | |||
18007 | ||||
18008 | SmallVector<int, 4> RepeatedMask; | |||
18009 | if (is256BitLaneRepeatedShuffleMask(MVT::v8f64, Mask, RepeatedMask)) | |||
18010 | return DAG.getNode(X86ISD::VPERMI, DL, MVT::v8f64, V1, | |||
18011 | getV4X86ShuffleImm8ForMask(RepeatedMask, DL, DAG)); | |||
18012 | } | |||
18013 | ||||
18014 | if (SDValue Shuf128 = lowerV4X128Shuffle(DL, MVT::v8f64, Mask, Zeroable, V1, | |||
18015 | V2, Subtarget, DAG)) | |||
18016 | return Shuf128; | |||
18017 | ||||
18018 | if (SDValue Unpck = lowerShuffleWithUNPCK(DL, MVT::v8f64, Mask, V1, V2, DAG)) | |||
18019 | return Unpck; | |||
18020 | ||||
18021 | // Check if the blend happens to exactly fit that of SHUFPD. | |||
18022 | if (SDValue Op = lowerShuffleWithSHUFPD(DL, MVT::v8f64, V1, V2, Mask, | |||
18023 | Zeroable, Subtarget, DAG)) | |||
18024 | return Op; | |||
18025 | ||||
18026 | if (SDValue V = lowerShuffleToEXPAND(DL, MVT::v8f64, Zeroable, Mask, V1, V2, | |||
18027 | DAG, Subtarget)) | |||
18028 | return V; | |||
18029 | ||||
18030 | if (SDValue Blend = lowerShuffleAsBlend(DL, MVT::v8f64, V1, V2, Mask, | |||
18031 | Zeroable, Subtarget, DAG)) | |||
18032 | return Blend; | |||
18033 | ||||
18034 | return lowerShuffleWithPERMV(DL, MVT::v8f64, Mask, V1, V2, Subtarget, DAG); | |||
18035 | } | |||
18036 | ||||
18037 | /// Handle lowering of 16-lane 32-bit floating point shuffles. | |||
18038 | static SDValue lowerV16F32Shuffle(const SDLoc &DL, ArrayRef<int> Mask, | |||
18039 | const APInt &Zeroable, SDValue V1, SDValue V2, | |||
18040 | const X86Subtarget &Subtarget, | |||
18041 | SelectionDAG &DAG) { | |||
18042 | assert(V1.getSimpleValueType() == MVT::v16f32 && "Bad operand type!")(static_cast <bool> (V1.getSimpleValueType() == MVT::v16f32 && "Bad operand type!") ? void (0) : __assert_fail ( "V1.getSimpleValueType() == MVT::v16f32 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18042, __extension__ __PRETTY_FUNCTION__)); | |||
18043 | assert(V2.getSimpleValueType() == MVT::v16f32 && "Bad operand type!")(static_cast <bool> (V2.getSimpleValueType() == MVT::v16f32 && "Bad operand type!") ? void (0) : __assert_fail ( "V2.getSimpleValueType() == MVT::v16f32 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18043, __extension__ __PRETTY_FUNCTION__)); | |||
18044 | assert(Mask.size() == 16 && "Unexpected mask size for v16 shuffle!")(static_cast <bool> (Mask.size() == 16 && "Unexpected mask size for v16 shuffle!" ) ? void (0) : __assert_fail ("Mask.size() == 16 && \"Unexpected mask size for v16 shuffle!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18044, __extension__ __PRETTY_FUNCTION__)); | |||
18045 | ||||
18046 | // If the shuffle mask is repeated in each 128-bit lane, we have many more | |||
18047 | // options to efficiently lower the shuffle. | |||
18048 | SmallVector<int, 4> RepeatedMask; | |||
18049 | if (is128BitLaneRepeatedShuffleMask(MVT::v16f32, Mask, RepeatedMask)) { | |||
18050 | assert(RepeatedMask.size() == 4 && "Unexpected repeated mask size!")(static_cast <bool> (RepeatedMask.size() == 4 && "Unexpected repeated mask size!") ? void (0) : __assert_fail ("RepeatedMask.size() == 4 && \"Unexpected repeated mask size!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18050, __extension__ __PRETTY_FUNCTION__)); | |||
18051 | ||||
18052 | // Use even/odd duplicate instructions for masks that match their pattern. | |||
18053 | if (isShuffleEquivalent(RepeatedMask, {0, 0, 2, 2}, V1, V2)) | |||
18054 | return DAG.getNode(X86ISD::MOVSLDUP, DL, MVT::v16f32, V1); | |||
18055 | if (isShuffleEquivalent(RepeatedMask, {1, 1, 3, 3}, V1, V2)) | |||
18056 | return DAG.getNode(X86ISD::MOVSHDUP, DL, MVT::v16f32, V1); | |||
18057 | ||||
18058 | if (V2.isUndef()) | |||
18059 | return DAG.getNode(X86ISD::VPERMILPI, DL, MVT::v16f32, V1, | |||
18060 | getV4X86ShuffleImm8ForMask(RepeatedMask, DL, DAG)); | |||
18061 | ||||
18062 | // Use dedicated unpack instructions for masks that match their pattern. | |||
18063 | if (SDValue V = lowerShuffleWithUNPCK(DL, MVT::v16f32, Mask, V1, V2, DAG)) | |||
18064 | return V; | |||
18065 | ||||
18066 | if (SDValue Blend = lowerShuffleAsBlend(DL, MVT::v16f32, V1, V2, Mask, | |||
18067 | Zeroable, Subtarget, DAG)) | |||
18068 | return Blend; | |||
18069 | ||||
18070 | // Otherwise, fall back to a SHUFPS sequence. | |||
18071 | return lowerShuffleWithSHUFPS(DL, MVT::v16f32, RepeatedMask, V1, V2, DAG); | |||
18072 | } | |||
18073 | ||||
18074 | // Try to create an in-lane repeating shuffle mask and then shuffle the | |||
18075 | // results into the target lanes. | |||
18076 | if (SDValue V = lowerShuffleAsRepeatedMaskAndLanePermute( | |||
18077 | DL, MVT::v16f32, V1, V2, Mask, Subtarget, DAG)) | |||
18078 | return V; | |||
18079 | ||||
18080 | // If we have a single input shuffle with different shuffle patterns in the | |||
18081 | // 128-bit lanes and don't lane cross, use variable mask VPERMILPS. | |||
18082 | if (V2.isUndef() && | |||
18083 | !is128BitLaneCrossingShuffleMask(MVT::v16f32, Mask)) { | |||
18084 | SDValue VPermMask = getConstVector(Mask, MVT::v16i32, DAG, DL, true); | |||
18085 | return DAG.getNode(X86ISD::VPERMILPV, DL, MVT::v16f32, V1, VPermMask); | |||
18086 | } | |||
18087 | ||||
18088 | // If we have AVX512F support, we can use VEXPAND. | |||
18089 | if (SDValue V = lowerShuffleToEXPAND(DL, MVT::v16f32, Zeroable, Mask, | |||
18090 | V1, V2, DAG, Subtarget)) | |||
18091 | return V; | |||
18092 | ||||
18093 | return lowerShuffleWithPERMV(DL, MVT::v16f32, Mask, V1, V2, Subtarget, DAG); | |||
18094 | } | |||
18095 | ||||
18096 | /// Handle lowering of 8-lane 64-bit integer shuffles. | |||
18097 | static SDValue lowerV8I64Shuffle(const SDLoc &DL, ArrayRef<int> Mask, | |||
18098 | const APInt &Zeroable, SDValue V1, SDValue V2, | |||
18099 | const X86Subtarget &Subtarget, | |||
18100 | SelectionDAG &DAG) { | |||
18101 | assert(V1.getSimpleValueType() == MVT::v8i64 && "Bad operand type!")(static_cast <bool> (V1.getSimpleValueType() == MVT::v8i64 && "Bad operand type!") ? void (0) : __assert_fail ( "V1.getSimpleValueType() == MVT::v8i64 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18101, __extension__ __PRETTY_FUNCTION__)); | |||
18102 | assert(V2.getSimpleValueType() == MVT::v8i64 && "Bad operand type!")(static_cast <bool> (V2.getSimpleValueType() == MVT::v8i64 && "Bad operand type!") ? void (0) : __assert_fail ( "V2.getSimpleValueType() == MVT::v8i64 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18102, __extension__ __PRETTY_FUNCTION__)); | |||
18103 | assert(Mask.size() == 8 && "Unexpected mask size for v8 shuffle!")(static_cast <bool> (Mask.size() == 8 && "Unexpected mask size for v8 shuffle!" ) ? void (0) : __assert_fail ("Mask.size() == 8 && \"Unexpected mask size for v8 shuffle!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18103, __extension__ __PRETTY_FUNCTION__)); | |||
18104 | ||||
18105 | if (V2.isUndef()) { | |||
18106 | // When the shuffle is mirrored between the 128-bit lanes of the unit, we | |||
18107 | // can use lower latency instructions that will operate on all four | |||
18108 | // 128-bit lanes. | |||
18109 | SmallVector<int, 2> Repeated128Mask; | |||
18110 | if (is128BitLaneRepeatedShuffleMask(MVT::v8i64, Mask, Repeated128Mask)) { | |||
18111 | SmallVector<int, 4> PSHUFDMask; | |||
18112 | narrowShuffleMaskElts(2, Repeated128Mask, PSHUFDMask); | |||
18113 | return DAG.getBitcast( | |||
18114 | MVT::v8i64, | |||
18115 | DAG.getNode(X86ISD::PSHUFD, DL, MVT::v16i32, | |||
18116 | DAG.getBitcast(MVT::v16i32, V1), | |||
18117 | getV4X86ShuffleImm8ForMask(PSHUFDMask, DL, DAG))); | |||
18118 | } | |||
18119 | ||||
18120 | SmallVector<int, 4> Repeated256Mask; | |||
18121 | if (is256BitLaneRepeatedShuffleMask(MVT::v8i64, Mask, Repeated256Mask)) | |||
18122 | return DAG.getNode(X86ISD::VPERMI, DL, MVT::v8i64, V1, | |||
18123 | getV4X86ShuffleImm8ForMask(Repeated256Mask, DL, DAG)); | |||
18124 | } | |||
18125 | ||||
18126 | if (SDValue Shuf128 = lowerV4X128Shuffle(DL, MVT::v8i64, Mask, Zeroable, V1, | |||
18127 | V2, Subtarget, DAG)) | |||
18128 | return Shuf128; | |||
18129 | ||||
18130 | // Try to use shift instructions. | |||
18131 | if (SDValue Shift = lowerShuffleAsShift(DL, MVT::v8i64, V1, V2, Mask, | |||
18132 | Zeroable, Subtarget, DAG)) | |||
18133 | return Shift; | |||
18134 | ||||
18135 | // Try to use VALIGN. | |||
18136 | if (SDValue Rotate = lowerShuffleAsVALIGN(DL, MVT::v8i64, V1, V2, Mask, | |||
18137 | Subtarget, DAG)) | |||
18138 | return Rotate; | |||
18139 | ||||
18140 | // Try to use PALIGNR. | |||
18141 | if (Subtarget.hasBWI()) | |||
18142 | if (SDValue Rotate = lowerShuffleAsByteRotate(DL, MVT::v8i64, V1, V2, Mask, | |||
18143 | Subtarget, DAG)) | |||
18144 | return Rotate; | |||
18145 | ||||
18146 | if (SDValue Unpck = lowerShuffleWithUNPCK(DL, MVT::v8i64, Mask, V1, V2, DAG)) | |||
18147 | return Unpck; | |||
18148 | ||||
18149 | // If we have AVX512F support, we can use VEXPAND. | |||
18150 | if (SDValue V = lowerShuffleToEXPAND(DL, MVT::v8i64, Zeroable, Mask, V1, V2, | |||
18151 | DAG, Subtarget)) | |||
18152 | return V; | |||
18153 | ||||
18154 | if (SDValue Blend = lowerShuffleAsBlend(DL, MVT::v8i64, V1, V2, Mask, | |||
18155 | Zeroable, Subtarget, DAG)) | |||
18156 | return Blend; | |||
18157 | ||||
18158 | return lowerShuffleWithPERMV(DL, MVT::v8i64, Mask, V1, V2, Subtarget, DAG); | |||
18159 | } | |||
18160 | ||||
18161 | /// Handle lowering of 16-lane 32-bit integer shuffles. | |||
18162 | static SDValue lowerV16I32Shuffle(const SDLoc &DL, ArrayRef<int> Mask, | |||
18163 | const APInt &Zeroable, SDValue V1, SDValue V2, | |||
18164 | const X86Subtarget &Subtarget, | |||
18165 | SelectionDAG &DAG) { | |||
18166 | assert(V1.getSimpleValueType() == MVT::v16i32 && "Bad operand type!")(static_cast <bool> (V1.getSimpleValueType() == MVT::v16i32 && "Bad operand type!") ? void (0) : __assert_fail ( "V1.getSimpleValueType() == MVT::v16i32 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18166, __extension__ __PRETTY_FUNCTION__)); | |||
18167 | assert(V2.getSimpleValueType() == MVT::v16i32 && "Bad operand type!")(static_cast <bool> (V2.getSimpleValueType() == MVT::v16i32 && "Bad operand type!") ? void (0) : __assert_fail ( "V2.getSimpleValueType() == MVT::v16i32 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18167, __extension__ __PRETTY_FUNCTION__)); | |||
18168 | assert(Mask.size() == 16 && "Unexpected mask size for v16 shuffle!")(static_cast <bool> (Mask.size() == 16 && "Unexpected mask size for v16 shuffle!" ) ? void (0) : __assert_fail ("Mask.size() == 16 && \"Unexpected mask size for v16 shuffle!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18168, __extension__ __PRETTY_FUNCTION__)); | |||
18169 | ||||
18170 | // Whenever we can lower this as a zext, that instruction is strictly faster | |||
18171 | // than any alternative. It also allows us to fold memory operands into the | |||
18172 | // shuffle in many cases. | |||
18173 | if (SDValue ZExt = lowerShuffleAsZeroOrAnyExtend( | |||
18174 | DL, MVT::v16i32, V1, V2, Mask, Zeroable, Subtarget, DAG)) | |||
18175 | return ZExt; | |||
18176 | ||||
18177 | // If the shuffle mask is repeated in each 128-bit lane we can use more | |||
18178 | // efficient instructions that mirror the shuffles across the four 128-bit | |||
18179 | // lanes. | |||
18180 | SmallVector<int, 4> RepeatedMask; | |||
18181 | bool Is128BitLaneRepeatedShuffle = | |||
18182 | is128BitLaneRepeatedShuffleMask(MVT::v16i32, Mask, RepeatedMask); | |||
18183 | if (Is128BitLaneRepeatedShuffle) { | |||
18184 | assert(RepeatedMask.size() == 4 && "Unexpected repeated mask size!")(static_cast <bool> (RepeatedMask.size() == 4 && "Unexpected repeated mask size!") ? void (0) : __assert_fail ("RepeatedMask.size() == 4 && \"Unexpected repeated mask size!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18184, __extension__ __PRETTY_FUNCTION__)); | |||
18185 | if (V2.isUndef()) | |||
18186 | return DAG.getNode(X86ISD::PSHUFD, DL, MVT::v16i32, V1, | |||
18187 | getV4X86ShuffleImm8ForMask(RepeatedMask, DL, DAG)); | |||
18188 | ||||
18189 | // Use dedicated unpack instructions for masks that match their pattern. | |||
18190 | if (SDValue V = lowerShuffleWithUNPCK(DL, MVT::v16i32, Mask, V1, V2, DAG)) | |||
18191 | return V; | |||
18192 | } | |||
18193 | ||||
18194 | // Try to use shift instructions. | |||
18195 | if (SDValue Shift = lowerShuffleAsShift(DL, MVT::v16i32, V1, V2, Mask, | |||
18196 | Zeroable, Subtarget, DAG)) | |||
18197 | return Shift; | |||
18198 | ||||
18199 | // Try to use VALIGN. | |||
18200 | if (SDValue Rotate = lowerShuffleAsVALIGN(DL, MVT::v16i32, V1, V2, Mask, | |||
18201 | Subtarget, DAG)) | |||
18202 | return Rotate; | |||
18203 | ||||
18204 | // Try to use byte rotation instructions. | |||
18205 | if (Subtarget.hasBWI()) | |||
18206 | if (SDValue Rotate = lowerShuffleAsByteRotate(DL, MVT::v16i32, V1, V2, Mask, | |||
18207 | Subtarget, DAG)) | |||
18208 | return Rotate; | |||
18209 | ||||
18210 | // Assume that a single SHUFPS is faster than using a permv shuffle. | |||
18211 | // If some CPU is harmed by the domain switch, we can fix it in a later pass. | |||
18212 | if (Is128BitLaneRepeatedShuffle && isSingleSHUFPSMask(RepeatedMask)) { | |||
18213 | SDValue CastV1 = DAG.getBitcast(MVT::v16f32, V1); | |||
18214 | SDValue CastV2 = DAG.getBitcast(MVT::v16f32, V2); | |||
18215 | SDValue ShufPS = lowerShuffleWithSHUFPS(DL, MVT::v16f32, RepeatedMask, | |||
18216 | CastV1, CastV2, DAG); | |||
18217 | return DAG.getBitcast(MVT::v16i32, ShufPS); | |||
18218 | } | |||
18219 | ||||
18220 | // Try to create an in-lane repeating shuffle mask and then shuffle the | |||
18221 | // results into the target lanes. | |||
18222 | if (SDValue V = lowerShuffleAsRepeatedMaskAndLanePermute( | |||
18223 | DL, MVT::v16i32, V1, V2, Mask, Subtarget, DAG)) | |||
18224 | return V; | |||
18225 | ||||
18226 | // If we have AVX512F support, we can use VEXPAND. | |||
18227 | if (SDValue V = lowerShuffleToEXPAND(DL, MVT::v16i32, Zeroable, Mask, V1, V2, | |||
18228 | DAG, Subtarget)) | |||
18229 | return V; | |||
18230 | ||||
18231 | if (SDValue Blend = lowerShuffleAsBlend(DL, MVT::v16i32, V1, V2, Mask, | |||
18232 | Zeroable, Subtarget, DAG)) | |||
18233 | return Blend; | |||
18234 | ||||
18235 | return lowerShuffleWithPERMV(DL, MVT::v16i32, Mask, V1, V2, Subtarget, DAG); | |||
18236 | } | |||
18237 | ||||
18238 | /// Handle lowering of 32-lane 16-bit integer shuffles. | |||
18239 | static SDValue lowerV32I16Shuffle(const SDLoc &DL, ArrayRef<int> Mask, | |||
18240 | const APInt &Zeroable, SDValue V1, SDValue V2, | |||
18241 | const X86Subtarget &Subtarget, | |||
18242 | SelectionDAG &DAG) { | |||
18243 | assert(V1.getSimpleValueType() == MVT::v32i16 && "Bad operand type!")(static_cast <bool> (V1.getSimpleValueType() == MVT::v32i16 && "Bad operand type!") ? void (0) : __assert_fail ( "V1.getSimpleValueType() == MVT::v32i16 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18243, __extension__ __PRETTY_FUNCTION__)); | |||
18244 | assert(V2.getSimpleValueType() == MVT::v32i16 && "Bad operand type!")(static_cast <bool> (V2.getSimpleValueType() == MVT::v32i16 && "Bad operand type!") ? void (0) : __assert_fail ( "V2.getSimpleValueType() == MVT::v32i16 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18244, __extension__ __PRETTY_FUNCTION__)); | |||
18245 | assert(Mask.size() == 32 && "Unexpected mask size for v32 shuffle!")(static_cast <bool> (Mask.size() == 32 && "Unexpected mask size for v32 shuffle!" ) ? void (0) : __assert_fail ("Mask.size() == 32 && \"Unexpected mask size for v32 shuffle!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18245, __extension__ __PRETTY_FUNCTION__)); | |||
18246 | assert(Subtarget.hasBWI() && "We can only lower v32i16 with AVX-512-BWI!")(static_cast <bool> (Subtarget.hasBWI() && "We can only lower v32i16 with AVX-512-BWI!" ) ? void (0) : __assert_fail ("Subtarget.hasBWI() && \"We can only lower v32i16 with AVX-512-BWI!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18246, __extension__ __PRETTY_FUNCTION__)); | |||
18247 | ||||
18248 | // Whenever we can lower this as a zext, that instruction is strictly faster | |||
18249 | // than any alternative. It also allows us to fold memory operands into the | |||
18250 | // shuffle in many cases. | |||
18251 | if (SDValue ZExt = lowerShuffleAsZeroOrAnyExtend( | |||
18252 | DL, MVT::v32i16, V1, V2, Mask, Zeroable, Subtarget, DAG)) | |||
18253 | return ZExt; | |||
18254 | ||||
18255 | // Use dedicated unpack instructions for masks that match their pattern. | |||
18256 | if (SDValue V = lowerShuffleWithUNPCK(DL, MVT::v32i16, Mask, V1, V2, DAG)) | |||
18257 | return V; | |||
18258 | ||||
18259 | // Use dedicated pack instructions for masks that match their pattern. | |||
18260 | if (SDValue V = | |||
18261 | lowerShuffleWithPACK(DL, MVT::v32i16, Mask, V1, V2, DAG, Subtarget)) | |||
18262 | return V; | |||
18263 | ||||
18264 | // Try to use shift instructions. | |||
18265 | if (SDValue Shift = lowerShuffleAsShift(DL, MVT::v32i16, V1, V2, Mask, | |||
18266 | Zeroable, Subtarget, DAG)) | |||
18267 | return Shift; | |||
18268 | ||||
18269 | // Try to use byte rotation instructions. | |||
18270 | if (SDValue Rotate = lowerShuffleAsByteRotate(DL, MVT::v32i16, V1, V2, Mask, | |||
18271 | Subtarget, DAG)) | |||
18272 | return Rotate; | |||
18273 | ||||
18274 | if (V2.isUndef()) { | |||
18275 | // Try to use bit rotation instructions. | |||
18276 | if (SDValue Rotate = | |||
18277 | lowerShuffleAsBitRotate(DL, MVT::v32i16, V1, Mask, Subtarget, DAG)) | |||
18278 | return Rotate; | |||
18279 | ||||
18280 | SmallVector<int, 8> RepeatedMask; | |||
18281 | if (is128BitLaneRepeatedShuffleMask(MVT::v32i16, Mask, RepeatedMask)) { | |||
18282 | // As this is a single-input shuffle, the repeated mask should be | |||
18283 | // a strictly valid v8i16 mask that we can pass through to the v8i16 | |||
18284 | // lowering to handle even the v32 case. | |||
18285 | return lowerV8I16GeneralSingleInputShuffle(DL, MVT::v32i16, V1, | |||
18286 | RepeatedMask, Subtarget, DAG); | |||
18287 | } | |||
18288 | } | |||
18289 | ||||
18290 | if (SDValue Blend = lowerShuffleAsBlend(DL, MVT::v32i16, V1, V2, Mask, | |||
18291 | Zeroable, Subtarget, DAG)) | |||
18292 | return Blend; | |||
18293 | ||||
18294 | if (SDValue PSHUFB = lowerShuffleWithPSHUFB(DL, MVT::v32i16, Mask, V1, V2, | |||
18295 | Zeroable, Subtarget, DAG)) | |||
18296 | return PSHUFB; | |||
18297 | ||||
18298 | return lowerShuffleWithPERMV(DL, MVT::v32i16, Mask, V1, V2, Subtarget, DAG); | |||
18299 | } | |||
18300 | ||||
18301 | /// Handle lowering of 64-lane 8-bit integer shuffles. | |||
18302 | static SDValue lowerV64I8Shuffle(const SDLoc &DL, ArrayRef<int> Mask, | |||
18303 | const APInt &Zeroable, SDValue V1, SDValue V2, | |||
18304 | const X86Subtarget &Subtarget, | |||
18305 | SelectionDAG &DAG) { | |||
18306 | assert(V1.getSimpleValueType() == MVT::v64i8 && "Bad operand type!")(static_cast <bool> (V1.getSimpleValueType() == MVT::v64i8 && "Bad operand type!") ? void (0) : __assert_fail ( "V1.getSimpleValueType() == MVT::v64i8 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18306, __extension__ __PRETTY_FUNCTION__)); | |||
18307 | assert(V2.getSimpleValueType() == MVT::v64i8 && "Bad operand type!")(static_cast <bool> (V2.getSimpleValueType() == MVT::v64i8 && "Bad operand type!") ? void (0) : __assert_fail ( "V2.getSimpleValueType() == MVT::v64i8 && \"Bad operand type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18307, __extension__ __PRETTY_FUNCTION__)); | |||
18308 | assert(Mask.size() == 64 && "Unexpected mask size for v64 shuffle!")(static_cast <bool> (Mask.size() == 64 && "Unexpected mask size for v64 shuffle!" ) ? void (0) : __assert_fail ("Mask.size() == 64 && \"Unexpected mask size for v64 shuffle!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18308, __extension__ __PRETTY_FUNCTION__)); | |||
18309 | assert(Subtarget.hasBWI() && "We can only lower v64i8 with AVX-512-BWI!")(static_cast <bool> (Subtarget.hasBWI() && "We can only lower v64i8 with AVX-512-BWI!" ) ? void (0) : __assert_fail ("Subtarget.hasBWI() && \"We can only lower v64i8 with AVX-512-BWI!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18309, __extension__ __PRETTY_FUNCTION__)); | |||
18310 | ||||
18311 | // Whenever we can lower this as a zext, that instruction is strictly faster | |||
18312 | // than any alternative. It also allows us to fold memory operands into the | |||
18313 | // shuffle in many cases. | |||
18314 | if (SDValue ZExt = lowerShuffleAsZeroOrAnyExtend( | |||
18315 | DL, MVT::v64i8, V1, V2, Mask, Zeroable, Subtarget, DAG)) | |||
18316 | return ZExt; | |||
18317 | ||||
18318 | // Use dedicated unpack instructions for masks that match their pattern. | |||
18319 | if (SDValue V = lowerShuffleWithUNPCK(DL, MVT::v64i8, Mask, V1, V2, DAG)) | |||
18320 | return V; | |||
18321 | ||||
18322 | // Use dedicated pack instructions for masks that match their pattern. | |||
18323 | if (SDValue V = lowerShuffleWithPACK(DL, MVT::v64i8, Mask, V1, V2, DAG, | |||
18324 | Subtarget)) | |||
18325 | return V; | |||
18326 | ||||
18327 | // Try to use shift instructions. | |||
18328 | if (SDValue Shift = lowerShuffleAsShift(DL, MVT::v64i8, V1, V2, Mask, | |||
18329 | Zeroable, Subtarget, DAG)) | |||
18330 | return Shift; | |||
18331 | ||||
18332 | // Try to use byte rotation instructions. | |||
18333 | if (SDValue Rotate = lowerShuffleAsByteRotate(DL, MVT::v64i8, V1, V2, Mask, | |||
18334 | Subtarget, DAG)) | |||
18335 | return Rotate; | |||
18336 | ||||
18337 | // Try to use bit rotation instructions. | |||
18338 | if (V2.isUndef()) | |||
18339 | if (SDValue Rotate = | |||
18340 | lowerShuffleAsBitRotate(DL, MVT::v64i8, V1, Mask, Subtarget, DAG)) | |||
18341 | return Rotate; | |||
18342 | ||||
18343 | // Lower as AND if possible. | |||
18344 | if (SDValue Masked = lowerShuffleAsBitMask(DL, MVT::v64i8, V1, V2, Mask, | |||
18345 | Zeroable, Subtarget, DAG)) | |||
18346 | return Masked; | |||
18347 | ||||
18348 | if (SDValue PSHUFB = lowerShuffleWithPSHUFB(DL, MVT::v64i8, Mask, V1, V2, | |||
18349 | Zeroable, Subtarget, DAG)) | |||
18350 | return PSHUFB; | |||
18351 | ||||
18352 | // VBMI can use VPERMV/VPERMV3 byte shuffles. | |||
18353 | if (Subtarget.hasVBMI()) | |||
18354 | return lowerShuffleWithPERMV(DL, MVT::v64i8, Mask, V1, V2, Subtarget, DAG); | |||
18355 | ||||
18356 | // Try to create an in-lane repeating shuffle mask and then shuffle the | |||
18357 | // results into the target lanes. | |||
18358 | if (SDValue V = lowerShuffleAsRepeatedMaskAndLanePermute( | |||
18359 | DL, MVT::v64i8, V1, V2, Mask, Subtarget, DAG)) | |||
18360 | return V; | |||
18361 | ||||
18362 | if (SDValue Blend = lowerShuffleAsBlend(DL, MVT::v64i8, V1, V2, Mask, | |||
18363 | Zeroable, Subtarget, DAG)) | |||
18364 | return Blend; | |||
18365 | ||||
18366 | // Try to simplify this by merging 128-bit lanes to enable a lane-based | |||
18367 | // shuffle. | |||
18368 | if (!V2.isUndef()) | |||
18369 | if (SDValue Result = lowerShuffleAsLanePermuteAndRepeatedMask( | |||
18370 | DL, MVT::v64i8, V1, V2, Mask, Subtarget, DAG)) | |||
18371 | return Result; | |||
18372 | ||||
18373 | // FIXME: Implement direct support for this type! | |||
18374 | return splitAndLowerShuffle(DL, MVT::v64i8, V1, V2, Mask, DAG); | |||
18375 | } | |||
18376 | ||||
18377 | /// High-level routine to lower various 512-bit x86 vector shuffles. | |||
18378 | /// | |||
18379 | /// This routine either breaks down the specific type of a 512-bit x86 vector | |||
18380 | /// shuffle or splits it into two 256-bit shuffles and fuses the results back | |||
18381 | /// together based on the available instructions. | |||
18382 | static SDValue lower512BitShuffle(const SDLoc &DL, ArrayRef<int> Mask, | |||
18383 | MVT VT, SDValue V1, SDValue V2, | |||
18384 | const APInt &Zeroable, | |||
18385 | const X86Subtarget &Subtarget, | |||
18386 | SelectionDAG &DAG) { | |||
18387 | assert(Subtarget.hasAVX512() &&(static_cast <bool> (Subtarget.hasAVX512() && "Cannot lower 512-bit vectors w/ basic ISA!" ) ? void (0) : __assert_fail ("Subtarget.hasAVX512() && \"Cannot lower 512-bit vectors w/ basic ISA!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18388, __extension__ __PRETTY_FUNCTION__)) | |||
18388 | "Cannot lower 512-bit vectors w/ basic ISA!")(static_cast <bool> (Subtarget.hasAVX512() && "Cannot lower 512-bit vectors w/ basic ISA!" ) ? void (0) : __assert_fail ("Subtarget.hasAVX512() && \"Cannot lower 512-bit vectors w/ basic ISA!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18388, __extension__ __PRETTY_FUNCTION__)); | |||
18389 | ||||
18390 | // If we have a single input to the zero element, insert that into V1 if we | |||
18391 | // can do so cheaply. | |||
18392 | int NumElts = Mask.size(); | |||
18393 | int NumV2Elements = count_if(Mask, [NumElts](int M) { return M >= NumElts; }); | |||
18394 | ||||
18395 | if (NumV2Elements == 1 && Mask[0] >= NumElts) | |||
18396 | if (SDValue Insertion = lowerShuffleAsElementInsertion( | |||
18397 | DL, VT, V1, V2, Mask, Zeroable, Subtarget, DAG)) | |||
18398 | return Insertion; | |||
18399 | ||||
18400 | // Handle special cases where the lower or upper half is UNDEF. | |||
18401 | if (SDValue V = | |||
18402 | lowerShuffleWithUndefHalf(DL, VT, V1, V2, Mask, Subtarget, DAG)) | |||
18403 | return V; | |||
18404 | ||||
18405 | // Check for being able to broadcast a single element. | |||
18406 | if (SDValue Broadcast = lowerShuffleAsBroadcast(DL, VT, V1, V2, Mask, | |||
18407 | Subtarget, DAG)) | |||
18408 | return Broadcast; | |||
18409 | ||||
18410 | if ((VT == MVT::v32i16 || VT == MVT::v64i8) && !Subtarget.hasBWI()) { | |||
18411 | // Try using bit ops for masking and blending before falling back to | |||
18412 | // splitting. | |||
18413 | if (SDValue V = lowerShuffleAsBitMask(DL, VT, V1, V2, Mask, Zeroable, | |||
18414 | Subtarget, DAG)) | |||
18415 | return V; | |||
18416 | if (SDValue V = lowerShuffleAsBitBlend(DL, VT, V1, V2, Mask, DAG)) | |||
18417 | return V; | |||
18418 | ||||
18419 | return splitAndLowerShuffle(DL, VT, V1, V2, Mask, DAG); | |||
18420 | } | |||
18421 | ||||
18422 | if (VT == MVT::v32f16) { | |||
18423 | V1 = DAG.getBitcast(MVT::v32i16, V1); | |||
18424 | V2 = DAG.getBitcast(MVT::v32i16, V2); | |||
18425 | return DAG.getBitcast(MVT::v32f16, | |||
18426 | DAG.getVectorShuffle(MVT::v32i16, DL, V1, V2, Mask)); | |||
18427 | } | |||
18428 | ||||
18429 | // Dispatch to each element type for lowering. If we don't have support for | |||
18430 | // specific element type shuffles at 512 bits, immediately split them and | |||
18431 | // lower them. Each lowering routine of a given type is allowed to assume that | |||
18432 | // the requisite ISA extensions for that element type are available. | |||
18433 | switch (VT.SimpleTy) { | |||
18434 | case MVT::v8f64: | |||
18435 | return lowerV8F64Shuffle(DL, Mask, Zeroable, V1, V2, Subtarget, DAG); | |||
18436 | case MVT::v16f32: | |||
18437 | return lowerV16F32Shuffle(DL, Mask, Zeroable, V1, V2, Subtarget, DAG); | |||
18438 | case MVT::v8i64: | |||
18439 | return lowerV8I64Shuffle(DL, Mask, Zeroable, V1, V2, Subtarget, DAG); | |||
18440 | case MVT::v16i32: | |||
18441 | return lowerV16I32Shuffle(DL, Mask, Zeroable, V1, V2, Subtarget, DAG); | |||
18442 | case MVT::v32i16: | |||
18443 | return lowerV32I16Shuffle(DL, Mask, Zeroable, V1, V2, Subtarget, DAG); | |||
18444 | case MVT::v64i8: | |||
18445 | return lowerV64I8Shuffle(DL, Mask, Zeroable, V1, V2, Subtarget, DAG); | |||
18446 | ||||
18447 | default: | |||
18448 | llvm_unreachable("Not a valid 512-bit x86 vector type!")::llvm::llvm_unreachable_internal("Not a valid 512-bit x86 vector type!" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18448); | |||
18449 | } | |||
18450 | } | |||
18451 | ||||
18452 | static SDValue lower1BitShuffleAsKSHIFTR(const SDLoc &DL, ArrayRef<int> Mask, | |||
18453 | MVT VT, SDValue V1, SDValue V2, | |||
18454 | const X86Subtarget &Subtarget, | |||
18455 | SelectionDAG &DAG) { | |||
18456 | // Shuffle should be unary. | |||
18457 | if (!V2.isUndef()) | |||
18458 | return SDValue(); | |||
18459 | ||||
18460 | int ShiftAmt = -1; | |||
18461 | int NumElts = Mask.size(); | |||
18462 | for (int i = 0; i != NumElts; ++i) { | |||
18463 | int M = Mask[i]; | |||
18464 | assert((M == SM_SentinelUndef || (0 <= M && M < NumElts)) &&(static_cast <bool> ((M == SM_SentinelUndef || (0 <= M && M < NumElts)) && "Unexpected mask index." ) ? void (0) : __assert_fail ("(M == SM_SentinelUndef || (0 <= M && M < NumElts)) && \"Unexpected mask index.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18465, __extension__ __PRETTY_FUNCTION__)) | |||
18465 | "Unexpected mask index.")(static_cast <bool> ((M == SM_SentinelUndef || (0 <= M && M < NumElts)) && "Unexpected mask index." ) ? void (0) : __assert_fail ("(M == SM_SentinelUndef || (0 <= M && M < NumElts)) && \"Unexpected mask index.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18465, __extension__ __PRETTY_FUNCTION__)); | |||
18466 | if (M < 0) | |||
18467 | continue; | |||
18468 | ||||
18469 | // The first non-undef element determines our shift amount. | |||
18470 | if (ShiftAmt < 0) { | |||
18471 | ShiftAmt = M - i; | |||
18472 | // Need to be shifting right. | |||
18473 | if (ShiftAmt <= 0) | |||
18474 | return SDValue(); | |||
18475 | } | |||
18476 | // All non-undef elements must shift by the same amount. | |||
18477 | if (ShiftAmt != M - i) | |||
18478 | return SDValue(); | |||
18479 | } | |||
18480 | assert(ShiftAmt >= 0 && "All undef?")(static_cast <bool> (ShiftAmt >= 0 && "All undef?" ) ? void (0) : __assert_fail ("ShiftAmt >= 0 && \"All undef?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18480, __extension__ __PRETTY_FUNCTION__)); | |||
18481 | ||||
18482 | // Great we found a shift right. | |||
18483 | MVT WideVT = VT; | |||
18484 | if ((!Subtarget.hasDQI() && NumElts == 8) || NumElts < 8) | |||
18485 | WideVT = Subtarget.hasDQI() ? MVT::v8i1 : MVT::v16i1; | |||
18486 | SDValue Res = DAG.getNode(ISD::INSERT_SUBVECTOR, DL, WideVT, | |||
18487 | DAG.getUNDEF(WideVT), V1, | |||
18488 | DAG.getIntPtrConstant(0, DL)); | |||
18489 | Res = DAG.getNode(X86ISD::KSHIFTR, DL, WideVT, Res, | |||
18490 | DAG.getTargetConstant(ShiftAmt, DL, MVT::i8)); | |||
18491 | return DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, VT, Res, | |||
18492 | DAG.getIntPtrConstant(0, DL)); | |||
18493 | } | |||
18494 | ||||
18495 | // Determine if this shuffle can be implemented with a KSHIFT instruction. | |||
18496 | // Returns the shift amount if possible or -1 if not. This is a simplified | |||
18497 | // version of matchShuffleAsShift. | |||
18498 | static int match1BitShuffleAsKSHIFT(unsigned &Opcode, ArrayRef<int> Mask, | |||
18499 | int MaskOffset, const APInt &Zeroable) { | |||
18500 | int Size = Mask.size(); | |||
18501 | ||||
18502 | auto CheckZeros = [&](int Shift, bool Left) { | |||
18503 | for (int j = 0; j < Shift; ++j) | |||
18504 | if (!Zeroable[j + (Left ? 0 : (Size - Shift))]) | |||
18505 | return false; | |||
18506 | ||||
18507 | return true; | |||
18508 | }; | |||
18509 | ||||
18510 | auto MatchShift = [&](int Shift, bool Left) { | |||
18511 | unsigned Pos = Left ? Shift : 0; | |||
18512 | unsigned Low = Left ? 0 : Shift; | |||
18513 | unsigned Len = Size - Shift; | |||
18514 | return isSequentialOrUndefInRange(Mask, Pos, Len, Low + MaskOffset); | |||
18515 | }; | |||
18516 | ||||
18517 | for (int Shift = 1; Shift != Size; ++Shift) | |||
18518 | for (bool Left : {true, false}) | |||
18519 | if (CheckZeros(Shift, Left) && MatchShift(Shift, Left)) { | |||
18520 | Opcode = Left ? X86ISD::KSHIFTL : X86ISD::KSHIFTR; | |||
18521 | return Shift; | |||
18522 | } | |||
18523 | ||||
18524 | return -1; | |||
18525 | } | |||
18526 | ||||
18527 | ||||
18528 | // Lower vXi1 vector shuffles. | |||
18529 | // There is no a dedicated instruction on AVX-512 that shuffles the masks. | |||
18530 | // The only way to shuffle bits is to sign-extend the mask vector to SIMD | |||
18531 | // vector, shuffle and then truncate it back. | |||
18532 | static SDValue lower1BitShuffle(const SDLoc &DL, ArrayRef<int> Mask, | |||
18533 | MVT VT, SDValue V1, SDValue V2, | |||
18534 | const APInt &Zeroable, | |||
18535 | const X86Subtarget &Subtarget, | |||
18536 | SelectionDAG &DAG) { | |||
18537 | assert(Subtarget.hasAVX512() &&(static_cast <bool> (Subtarget.hasAVX512() && "Cannot lower 512-bit vectors w/o basic ISA!" ) ? void (0) : __assert_fail ("Subtarget.hasAVX512() && \"Cannot lower 512-bit vectors w/o basic ISA!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18538, __extension__ __PRETTY_FUNCTION__)) | |||
18538 | "Cannot lower 512-bit vectors w/o basic ISA!")(static_cast <bool> (Subtarget.hasAVX512() && "Cannot lower 512-bit vectors w/o basic ISA!" ) ? void (0) : __assert_fail ("Subtarget.hasAVX512() && \"Cannot lower 512-bit vectors w/o basic ISA!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18538, __extension__ __PRETTY_FUNCTION__)); | |||
18539 | ||||
18540 | int NumElts = Mask.size(); | |||
18541 | ||||
18542 | // Try to recognize shuffles that are just padding a subvector with zeros. | |||
18543 | int SubvecElts = 0; | |||
18544 | int Src = -1; | |||
18545 | for (int i = 0; i != NumElts; ++i) { | |||
18546 | if (Mask[i] >= 0) { | |||
18547 | // Grab the source from the first valid mask. All subsequent elements need | |||
18548 | // to use this same source. | |||
18549 | if (Src < 0) | |||
18550 | Src = Mask[i] / NumElts; | |||
18551 | if (Src != (Mask[i] / NumElts) || (Mask[i] % NumElts) != i) | |||
18552 | break; | |||
18553 | } | |||
18554 | ||||
18555 | ++SubvecElts; | |||
18556 | } | |||
18557 | assert(SubvecElts != NumElts && "Identity shuffle?")(static_cast <bool> (SubvecElts != NumElts && "Identity shuffle?" ) ? void (0) : __assert_fail ("SubvecElts != NumElts && \"Identity shuffle?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18557, __extension__ __PRETTY_FUNCTION__)); | |||
18558 | ||||
18559 | // Clip to a power 2. | |||
18560 | SubvecElts = PowerOf2Floor(SubvecElts); | |||
18561 | ||||
18562 | // Make sure the number of zeroable bits in the top at least covers the bits | |||
18563 | // not covered by the subvector. | |||
18564 | if ((int)Zeroable.countLeadingOnes() >= (NumElts - SubvecElts)) { | |||
18565 | assert(Src >= 0 && "Expected a source!")(static_cast <bool> (Src >= 0 && "Expected a source!" ) ? void (0) : __assert_fail ("Src >= 0 && \"Expected a source!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18565, __extension__ __PRETTY_FUNCTION__)); | |||
18566 | MVT ExtractVT = MVT::getVectorVT(MVT::i1, SubvecElts); | |||
18567 | SDValue Extract = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, ExtractVT, | |||
18568 | Src == 0 ? V1 : V2, | |||
18569 | DAG.getIntPtrConstant(0, DL)); | |||
18570 | return DAG.getNode(ISD::INSERT_SUBVECTOR, DL, VT, | |||
18571 | DAG.getConstant(0, DL, VT), | |||
18572 | Extract, DAG.getIntPtrConstant(0, DL)); | |||
18573 | } | |||
18574 | ||||
18575 | // Try a simple shift right with undef elements. Later we'll try with zeros. | |||
18576 | if (SDValue Shift = lower1BitShuffleAsKSHIFTR(DL, Mask, VT, V1, V2, Subtarget, | |||
18577 | DAG)) | |||
18578 | return Shift; | |||
18579 | ||||
18580 | // Try to match KSHIFTs. | |||
18581 | unsigned Offset = 0; | |||
18582 | for (SDValue V : { V1, V2 }) { | |||
18583 | unsigned Opcode; | |||
18584 | int ShiftAmt = match1BitShuffleAsKSHIFT(Opcode, Mask, Offset, Zeroable); | |||
18585 | if (ShiftAmt >= 0) { | |||
18586 | MVT WideVT = VT; | |||
18587 | if ((!Subtarget.hasDQI() && NumElts == 8) || NumElts < 8) | |||
18588 | WideVT = Subtarget.hasDQI() ? MVT::v8i1 : MVT::v16i1; | |||
18589 | SDValue Res = DAG.getNode(ISD::INSERT_SUBVECTOR, DL, WideVT, | |||
18590 | DAG.getUNDEF(WideVT), V, | |||
18591 | DAG.getIntPtrConstant(0, DL)); | |||
18592 | // Widened right shifts need two shifts to ensure we shift in zeroes. | |||
18593 | if (Opcode == X86ISD::KSHIFTR && WideVT != VT) { | |||
18594 | int WideElts = WideVT.getVectorNumElements(); | |||
18595 | // Shift left to put the original vector in the MSBs of the new size. | |||
18596 | Res = DAG.getNode(X86ISD::KSHIFTL, DL, WideVT, Res, | |||
18597 | DAG.getTargetConstant(WideElts - NumElts, DL, MVT::i8)); | |||
18598 | // Increase the shift amount to account for the left shift. | |||
18599 | ShiftAmt += WideElts - NumElts; | |||
18600 | } | |||
18601 | ||||
18602 | Res = DAG.getNode(Opcode, DL, WideVT, Res, | |||
18603 | DAG.getTargetConstant(ShiftAmt, DL, MVT::i8)); | |||
18604 | return DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, VT, Res, | |||
18605 | DAG.getIntPtrConstant(0, DL)); | |||
18606 | } | |||
18607 | Offset += NumElts; // Increment for next iteration. | |||
18608 | } | |||
18609 | ||||
18610 | ||||
18611 | ||||
18612 | MVT ExtVT; | |||
18613 | switch (VT.SimpleTy) { | |||
18614 | default: | |||
18615 | llvm_unreachable("Expected a vector of i1 elements")::llvm::llvm_unreachable_internal("Expected a vector of i1 elements" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18615); | |||
18616 | case MVT::v2i1: | |||
18617 | ExtVT = MVT::v2i64; | |||
18618 | break; | |||
18619 | case MVT::v4i1: | |||
18620 | ExtVT = MVT::v4i32; | |||
18621 | break; | |||
18622 | case MVT::v8i1: | |||
18623 | // Take 512-bit type, more shuffles on KNL. If we have VLX use a 256-bit | |||
18624 | // shuffle. | |||
18625 | ExtVT = Subtarget.hasVLX() ? MVT::v8i32 : MVT::v8i64; | |||
18626 | break; | |||
18627 | case MVT::v16i1: | |||
18628 | // Take 512-bit type, unless we are avoiding 512-bit types and have the | |||
18629 | // 256-bit operation available. | |||
18630 | ExtVT = Subtarget.canExtendTo512DQ() ? MVT::v16i32 : MVT::v16i16; | |||
18631 | break; | |||
18632 | case MVT::v32i1: | |||
18633 | // Take 512-bit type, unless we are avoiding 512-bit types and have the | |||
18634 | // 256-bit operation available. | |||
18635 | assert(Subtarget.hasBWI() && "Expected AVX512BW support")(static_cast <bool> (Subtarget.hasBWI() && "Expected AVX512BW support" ) ? void (0) : __assert_fail ("Subtarget.hasBWI() && \"Expected AVX512BW support\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18635, __extension__ __PRETTY_FUNCTION__)); | |||
18636 | ExtVT = Subtarget.canExtendTo512BW() ? MVT::v32i16 : MVT::v32i8; | |||
18637 | break; | |||
18638 | case MVT::v64i1: | |||
18639 | // Fall back to scalarization. FIXME: We can do better if the shuffle | |||
18640 | // can be partitioned cleanly. | |||
18641 | if (!Subtarget.useBWIRegs()) | |||
18642 | return SDValue(); | |||
18643 | ExtVT = MVT::v64i8; | |||
18644 | break; | |||
18645 | } | |||
18646 | ||||
18647 | V1 = DAG.getNode(ISD::SIGN_EXTEND, DL, ExtVT, V1); | |||
18648 | V2 = DAG.getNode(ISD::SIGN_EXTEND, DL, ExtVT, V2); | |||
18649 | ||||
18650 | SDValue Shuffle = DAG.getVectorShuffle(ExtVT, DL, V1, V2, Mask); | |||
18651 | // i1 was sign extended we can use X86ISD::CVT2MASK. | |||
18652 | int NumElems = VT.getVectorNumElements(); | |||
18653 | if ((Subtarget.hasBWI() && (NumElems >= 32)) || | |||
18654 | (Subtarget.hasDQI() && (NumElems < 32))) | |||
18655 | return DAG.getSetCC(DL, VT, DAG.getConstant(0, DL, ExtVT), | |||
18656 | Shuffle, ISD::SETGT); | |||
18657 | ||||
18658 | return DAG.getNode(ISD::TRUNCATE, DL, VT, Shuffle); | |||
18659 | } | |||
18660 | ||||
18661 | /// Helper function that returns true if the shuffle mask should be | |||
18662 | /// commuted to improve canonicalization. | |||
18663 | static bool canonicalizeShuffleMaskWithCommute(ArrayRef<int> Mask) { | |||
18664 | int NumElements = Mask.size(); | |||
18665 | ||||
18666 | int NumV1Elements = 0, NumV2Elements = 0; | |||
18667 | for (int M : Mask) | |||
18668 | if (M < 0) | |||
18669 | continue; | |||
18670 | else if (M < NumElements) | |||
18671 | ++NumV1Elements; | |||
18672 | else | |||
18673 | ++NumV2Elements; | |||
18674 | ||||
18675 | // Commute the shuffle as needed such that more elements come from V1 than | |||
18676 | // V2. This allows us to match the shuffle pattern strictly on how many | |||
18677 | // elements come from V1 without handling the symmetric cases. | |||
18678 | if (NumV2Elements > NumV1Elements) | |||
18679 | return true; | |||
18680 | ||||
18681 | assert(NumV1Elements > 0 && "No V1 indices")(static_cast <bool> (NumV1Elements > 0 && "No V1 indices" ) ? void (0) : __assert_fail ("NumV1Elements > 0 && \"No V1 indices\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18681, __extension__ __PRETTY_FUNCTION__)); | |||
18682 | ||||
18683 | if (NumV2Elements == 0) | |||
18684 | return false; | |||
18685 | ||||
18686 | // When the number of V1 and V2 elements are the same, try to minimize the | |||
18687 | // number of uses of V2 in the low half of the vector. When that is tied, | |||
18688 | // ensure that the sum of indices for V1 is equal to or lower than the sum | |||
18689 | // indices for V2. When those are equal, try to ensure that the number of odd | |||
18690 | // indices for V1 is lower than the number of odd indices for V2. | |||
18691 | if (NumV1Elements == NumV2Elements) { | |||
18692 | int LowV1Elements = 0, LowV2Elements = 0; | |||
18693 | for (int M : Mask.slice(0, NumElements / 2)) | |||
18694 | if (M >= NumElements) | |||
18695 | ++LowV2Elements; | |||
18696 | else if (M >= 0) | |||
18697 | ++LowV1Elements; | |||
18698 | if (LowV2Elements > LowV1Elements) | |||
18699 | return true; | |||
18700 | if (LowV2Elements == LowV1Elements) { | |||
18701 | int SumV1Indices = 0, SumV2Indices = 0; | |||
18702 | for (int i = 0, Size = Mask.size(); i < Size; ++i) | |||
18703 | if (Mask[i] >= NumElements) | |||
18704 | SumV2Indices += i; | |||
18705 | else if (Mask[i] >= 0) | |||
18706 | SumV1Indices += i; | |||
18707 | if (SumV2Indices < SumV1Indices) | |||
18708 | return true; | |||
18709 | if (SumV2Indices == SumV1Indices) { | |||
18710 | int NumV1OddIndices = 0, NumV2OddIndices = 0; | |||
18711 | for (int i = 0, Size = Mask.size(); i < Size; ++i) | |||
18712 | if (Mask[i] >= NumElements) | |||
18713 | NumV2OddIndices += i % 2; | |||
18714 | else if (Mask[i] >= 0) | |||
18715 | NumV1OddIndices += i % 2; | |||
18716 | if (NumV2OddIndices < NumV1OddIndices) | |||
18717 | return true; | |||
18718 | } | |||
18719 | } | |||
18720 | } | |||
18721 | ||||
18722 | return false; | |||
18723 | } | |||
18724 | ||||
18725 | // Forward declaration. | |||
18726 | static SDValue canonicalizeShuffleMaskWithHorizOp( | |||
18727 | MutableArrayRef<SDValue> Ops, MutableArrayRef<int> Mask, | |||
18728 | unsigned RootSizeInBits, const SDLoc &DL, SelectionDAG &DAG, | |||
18729 | const X86Subtarget &Subtarget); | |||
18730 | ||||
18731 | /// Top-level lowering for x86 vector shuffles. | |||
18732 | /// | |||
18733 | /// This handles decomposition, canonicalization, and lowering of all x86 | |||
18734 | /// vector shuffles. Most of the specific lowering strategies are encapsulated | |||
18735 | /// above in helper routines. The canonicalization attempts to widen shuffles | |||
18736 | /// to involve fewer lanes of wider elements, consolidate symmetric patterns | |||
18737 | /// s.t. only one of the two inputs needs to be tested, etc. | |||
18738 | static SDValue lowerVECTOR_SHUFFLE(SDValue Op, const X86Subtarget &Subtarget, | |||
18739 | SelectionDAG &DAG) { | |||
18740 | ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op); | |||
18741 | ArrayRef<int> OrigMask = SVOp->getMask(); | |||
18742 | SDValue V1 = Op.getOperand(0); | |||
18743 | SDValue V2 = Op.getOperand(1); | |||
18744 | MVT VT = Op.getSimpleValueType(); | |||
18745 | int NumElements = VT.getVectorNumElements(); | |||
18746 | SDLoc DL(Op); | |||
18747 | bool Is1BitVector = (VT.getVectorElementType() == MVT::i1); | |||
18748 | ||||
18749 | assert((VT.getSizeInBits() != 64 || Is1BitVector) &&(static_cast <bool> ((VT.getSizeInBits() != 64 || Is1BitVector ) && "Can't lower MMX shuffles") ? void (0) : __assert_fail ("(VT.getSizeInBits() != 64 || Is1BitVector) && \"Can't lower MMX shuffles\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18750, __extension__ __PRETTY_FUNCTION__)) | |||
18750 | "Can't lower MMX shuffles")(static_cast <bool> ((VT.getSizeInBits() != 64 || Is1BitVector ) && "Can't lower MMX shuffles") ? void (0) : __assert_fail ("(VT.getSizeInBits() != 64 || Is1BitVector) && \"Can't lower MMX shuffles\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18750, __extension__ __PRETTY_FUNCTION__)); | |||
18751 | ||||
18752 | bool V1IsUndef = V1.isUndef(); | |||
18753 | bool V2IsUndef = V2.isUndef(); | |||
18754 | if (V1IsUndef && V2IsUndef) | |||
18755 | return DAG.getUNDEF(VT); | |||
18756 | ||||
18757 | // When we create a shuffle node we put the UNDEF node to second operand, | |||
18758 | // but in some cases the first operand may be transformed to UNDEF. | |||
18759 | // In this case we should just commute the node. | |||
18760 | if (V1IsUndef) | |||
18761 | return DAG.getCommutedVectorShuffle(*SVOp); | |||
18762 | ||||
18763 | // Check for non-undef masks pointing at an undef vector and make the masks | |||
18764 | // undef as well. This makes it easier to match the shuffle based solely on | |||
18765 | // the mask. | |||
18766 | if (V2IsUndef && | |||
18767 | any_of(OrigMask, [NumElements](int M) { return M >= NumElements; })) { | |||
18768 | SmallVector<int, 8> NewMask(OrigMask.begin(), OrigMask.end()); | |||
18769 | for (int &M : NewMask) | |||
18770 | if (M >= NumElements) | |||
18771 | M = -1; | |||
18772 | return DAG.getVectorShuffle(VT, DL, V1, V2, NewMask); | |||
18773 | } | |||
18774 | ||||
18775 | // Check for illegal shuffle mask element index values. | |||
18776 | int MaskUpperLimit = OrigMask.size() * (V2IsUndef ? 1 : 2); | |||
18777 | (void)MaskUpperLimit; | |||
18778 | assert(llvm::all_of(OrigMask,(static_cast <bool> (llvm::all_of(OrigMask, [&](int M) { return -1 <= M && M < MaskUpperLimit; }) && "Out of bounds shuffle index") ? void (0) : __assert_fail ("llvm::all_of(OrigMask, [&](int M) { return -1 <= M && M < MaskUpperLimit; }) && \"Out of bounds shuffle index\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18780, __extension__ __PRETTY_FUNCTION__)) | |||
18779 | [&](int M) { return -1 <= M && M < MaskUpperLimit; }) &&(static_cast <bool> (llvm::all_of(OrigMask, [&](int M) { return -1 <= M && M < MaskUpperLimit; }) && "Out of bounds shuffle index") ? void (0) : __assert_fail ("llvm::all_of(OrigMask, [&](int M) { return -1 <= M && M < MaskUpperLimit; }) && \"Out of bounds shuffle index\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18780, __extension__ __PRETTY_FUNCTION__)) | |||
18780 | "Out of bounds shuffle index")(static_cast <bool> (llvm::all_of(OrigMask, [&](int M) { return -1 <= M && M < MaskUpperLimit; }) && "Out of bounds shuffle index") ? void (0) : __assert_fail ("llvm::all_of(OrigMask, [&](int M) { return -1 <= M && M < MaskUpperLimit; }) && \"Out of bounds shuffle index\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18780, __extension__ __PRETTY_FUNCTION__)); | |||
18781 | ||||
18782 | // We actually see shuffles that are entirely re-arrangements of a set of | |||
18783 | // zero inputs. This mostly happens while decomposing complex shuffles into | |||
18784 | // simple ones. Directly lower these as a buildvector of zeros. | |||
18785 | APInt KnownUndef, KnownZero; | |||
18786 | computeZeroableShuffleElements(OrigMask, V1, V2, KnownUndef, KnownZero); | |||
18787 | ||||
18788 | APInt Zeroable = KnownUndef | KnownZero; | |||
18789 | if (Zeroable.isAllOnesValue()) | |||
18790 | return getZeroVector(VT, Subtarget, DAG, DL); | |||
18791 | ||||
18792 | bool V2IsZero = !V2IsUndef && ISD::isBuildVectorAllZeros(V2.getNode()); | |||
18793 | ||||
18794 | // Try to collapse shuffles into using a vector type with fewer elements but | |||
18795 | // wider element types. We cap this to not form integers or floating point | |||
18796 | // elements wider than 64 bits. It does not seem beneficial to form i128 | |||
18797 | // integers to handle flipping the low and high halves of AVX 256-bit vectors. | |||
18798 | SmallVector<int, 16> WidenedMask; | |||
18799 | if (VT.getScalarSizeInBits() < 64 && !Is1BitVector && | |||
18800 | canWidenShuffleElements(OrigMask, Zeroable, V2IsZero, WidenedMask)) { | |||
18801 | // Shuffle mask widening should not interfere with a broadcast opportunity | |||
18802 | // by obfuscating the operands with bitcasts. | |||
18803 | // TODO: Avoid lowering directly from this top-level function: make this | |||
18804 | // a query (canLowerAsBroadcast) and defer lowering to the type-based calls. | |||
18805 | if (SDValue Broadcast = lowerShuffleAsBroadcast(DL, VT, V1, V2, OrigMask, | |||
18806 | Subtarget, DAG)) | |||
18807 | return Broadcast; | |||
18808 | ||||
18809 | MVT NewEltVT = VT.isFloatingPoint() | |||
18810 | ? MVT::getFloatingPointVT(VT.getScalarSizeInBits() * 2) | |||
18811 | : MVT::getIntegerVT(VT.getScalarSizeInBits() * 2); | |||
18812 | int NewNumElts = NumElements / 2; | |||
18813 | MVT NewVT = MVT::getVectorVT(NewEltVT, NewNumElts); | |||
18814 | // Make sure that the new vector type is legal. For example, v2f64 isn't | |||
18815 | // legal on SSE1. | |||
18816 | if (DAG.getTargetLoweringInfo().isTypeLegal(NewVT)) { | |||
18817 | if (V2IsZero) { | |||
18818 | // Modify the new Mask to take all zeros from the all-zero vector. | |||
18819 | // Choose indices that are blend-friendly. | |||
18820 | bool UsedZeroVector = false; | |||
18821 | assert(is_contained(WidenedMask, SM_SentinelZero) &&(static_cast <bool> (is_contained(WidenedMask, SM_SentinelZero ) && "V2's non-undef elements are used?!") ? void (0) : __assert_fail ("is_contained(WidenedMask, SM_SentinelZero) && \"V2's non-undef elements are used?!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18822, __extension__ __PRETTY_FUNCTION__)) | |||
18822 | "V2's non-undef elements are used?!")(static_cast <bool> (is_contained(WidenedMask, SM_SentinelZero ) && "V2's non-undef elements are used?!") ? void (0) : __assert_fail ("is_contained(WidenedMask, SM_SentinelZero) && \"V2's non-undef elements are used?!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18822, __extension__ __PRETTY_FUNCTION__)); | |||
18823 | for (int i = 0; i != NewNumElts; ++i) | |||
18824 | if (WidenedMask[i] == SM_SentinelZero) { | |||
18825 | WidenedMask[i] = i + NewNumElts; | |||
18826 | UsedZeroVector = true; | |||
18827 | } | |||
18828 | // Ensure all elements of V2 are zero - isBuildVectorAllZeros permits | |||
18829 | // some elements to be undef. | |||
18830 | if (UsedZeroVector) | |||
18831 | V2 = getZeroVector(NewVT, Subtarget, DAG, DL); | |||
18832 | } | |||
18833 | V1 = DAG.getBitcast(NewVT, V1); | |||
18834 | V2 = DAG.getBitcast(NewVT, V2); | |||
18835 | return DAG.getBitcast( | |||
18836 | VT, DAG.getVectorShuffle(NewVT, DL, V1, V2, WidenedMask)); | |||
18837 | } | |||
18838 | } | |||
18839 | ||||
18840 | SmallVector<SDValue> Ops = {V1, V2}; | |||
18841 | SmallVector<int> Mask(OrigMask.begin(), OrigMask.end()); | |||
18842 | ||||
18843 | // Canonicalize the shuffle with any horizontal ops inputs. | |||
18844 | // NOTE: This may update Ops and Mask. | |||
18845 | if (SDValue HOp = canonicalizeShuffleMaskWithHorizOp( | |||
18846 | Ops, Mask, VT.getSizeInBits(), DL, DAG, Subtarget)) | |||
18847 | return DAG.getBitcast(VT, HOp); | |||
18848 | ||||
18849 | V1 = DAG.getBitcast(VT, Ops[0]); | |||
18850 | V2 = DAG.getBitcast(VT, Ops[1]); | |||
18851 | assert(NumElements == (int)Mask.size() &&(static_cast <bool> (NumElements == (int)Mask.size() && "canonicalizeShuffleMaskWithHorizOp " "shouldn't alter the shuffle mask size" ) ? void (0) : __assert_fail ("NumElements == (int)Mask.size() && \"canonicalizeShuffleMaskWithHorizOp \" \"shouldn't alter the shuffle mask size\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18853, __extension__ __PRETTY_FUNCTION__)) | |||
18852 | "canonicalizeShuffleMaskWithHorizOp "(static_cast <bool> (NumElements == (int)Mask.size() && "canonicalizeShuffleMaskWithHorizOp " "shouldn't alter the shuffle mask size" ) ? void (0) : __assert_fail ("NumElements == (int)Mask.size() && \"canonicalizeShuffleMaskWithHorizOp \" \"shouldn't alter the shuffle mask size\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18853, __extension__ __PRETTY_FUNCTION__)) | |||
18853 | "shouldn't alter the shuffle mask size")(static_cast <bool> (NumElements == (int)Mask.size() && "canonicalizeShuffleMaskWithHorizOp " "shouldn't alter the shuffle mask size" ) ? void (0) : __assert_fail ("NumElements == (int)Mask.size() && \"canonicalizeShuffleMaskWithHorizOp \" \"shouldn't alter the shuffle mask size\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18853, __extension__ __PRETTY_FUNCTION__)); | |||
18854 | ||||
18855 | // Commute the shuffle if it will improve canonicalization. | |||
18856 | if (canonicalizeShuffleMaskWithCommute(Mask)) { | |||
18857 | ShuffleVectorSDNode::commuteMask(Mask); | |||
18858 | std::swap(V1, V2); | |||
18859 | } | |||
18860 | ||||
18861 | // For each vector width, delegate to a specialized lowering routine. | |||
18862 | if (VT.is128BitVector()) | |||
18863 | return lower128BitShuffle(DL, Mask, VT, V1, V2, Zeroable, Subtarget, DAG); | |||
18864 | ||||
18865 | if (VT.is256BitVector()) | |||
18866 | return lower256BitShuffle(DL, Mask, VT, V1, V2, Zeroable, Subtarget, DAG); | |||
18867 | ||||
18868 | if (VT.is512BitVector()) | |||
18869 | return lower512BitShuffle(DL, Mask, VT, V1, V2, Zeroable, Subtarget, DAG); | |||
18870 | ||||
18871 | if (Is1BitVector) | |||
18872 | return lower1BitShuffle(DL, Mask, VT, V1, V2, Zeroable, Subtarget, DAG); | |||
18873 | ||||
18874 | llvm_unreachable("Unimplemented!")::llvm::llvm_unreachable_internal("Unimplemented!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18874); | |||
18875 | } | |||
18876 | ||||
18877 | /// Try to lower a VSELECT instruction to a vector shuffle. | |||
18878 | static SDValue lowerVSELECTtoVectorShuffle(SDValue Op, | |||
18879 | const X86Subtarget &Subtarget, | |||
18880 | SelectionDAG &DAG) { | |||
18881 | SDValue Cond = Op.getOperand(0); | |||
18882 | SDValue LHS = Op.getOperand(1); | |||
18883 | SDValue RHS = Op.getOperand(2); | |||
18884 | MVT VT = Op.getSimpleValueType(); | |||
18885 | ||||
18886 | // Only non-legal VSELECTs reach this lowering, convert those into generic | |||
18887 | // shuffles and re-use the shuffle lowering path for blends. | |||
18888 | if (ISD::isBuildVectorOfConstantSDNodes(Cond.getNode())) { | |||
18889 | SmallVector<int, 32> Mask; | |||
18890 | if (createShuffleMaskFromVSELECT(Mask, Cond)) | |||
18891 | return DAG.getVectorShuffle(VT, SDLoc(Op), LHS, RHS, Mask); | |||
18892 | } | |||
18893 | ||||
18894 | return SDValue(); | |||
18895 | } | |||
18896 | ||||
18897 | SDValue X86TargetLowering::LowerVSELECT(SDValue Op, SelectionDAG &DAG) const { | |||
18898 | SDValue Cond = Op.getOperand(0); | |||
18899 | SDValue LHS = Op.getOperand(1); | |||
18900 | SDValue RHS = Op.getOperand(2); | |||
18901 | ||||
18902 | // A vselect where all conditions and data are constants can be optimized into | |||
18903 | // a single vector load by SelectionDAGLegalize::ExpandBUILD_VECTOR(). | |||
18904 | if (ISD::isBuildVectorOfConstantSDNodes(Cond.getNode()) && | |||
18905 | ISD::isBuildVectorOfConstantSDNodes(LHS.getNode()) && | |||
18906 | ISD::isBuildVectorOfConstantSDNodes(RHS.getNode())) | |||
18907 | return SDValue(); | |||
18908 | ||||
18909 | // Try to lower this to a blend-style vector shuffle. This can handle all | |||
18910 | // constant condition cases. | |||
18911 | if (SDValue BlendOp = lowerVSELECTtoVectorShuffle(Op, Subtarget, DAG)) | |||
18912 | return BlendOp; | |||
18913 | ||||
18914 | // If this VSELECT has a vector if i1 as a mask, it will be directly matched | |||
18915 | // with patterns on the mask registers on AVX-512. | |||
18916 | MVT CondVT = Cond.getSimpleValueType(); | |||
18917 | unsigned CondEltSize = Cond.getScalarValueSizeInBits(); | |||
18918 | if (CondEltSize == 1) | |||
18919 | return Op; | |||
18920 | ||||
18921 | // Variable blends are only legal from SSE4.1 onward. | |||
18922 | if (!Subtarget.hasSSE41()) | |||
18923 | return SDValue(); | |||
18924 | ||||
18925 | SDLoc dl(Op); | |||
18926 | MVT VT = Op.getSimpleValueType(); | |||
18927 | unsigned EltSize = VT.getScalarSizeInBits(); | |||
18928 | unsigned NumElts = VT.getVectorNumElements(); | |||
18929 | ||||
18930 | // Expand v32i16/v64i8 without BWI. | |||
18931 | if ((VT == MVT::v32i16 || VT == MVT::v64i8) && !Subtarget.hasBWI()) | |||
18932 | return SDValue(); | |||
18933 | ||||
18934 | // If the VSELECT is on a 512-bit type, we have to convert a non-i1 condition | |||
18935 | // into an i1 condition so that we can use the mask-based 512-bit blend | |||
18936 | // instructions. | |||
18937 | if (VT.getSizeInBits() == 512) { | |||
18938 | // Build a mask by testing the condition against zero. | |||
18939 | MVT MaskVT = MVT::getVectorVT(MVT::i1, NumElts); | |||
18940 | SDValue Mask = DAG.getSetCC(dl, MaskVT, Cond, | |||
18941 | DAG.getConstant(0, dl, CondVT), | |||
18942 | ISD::SETNE); | |||
18943 | // Now return a new VSELECT using the mask. | |||
18944 | return DAG.getSelect(dl, VT, Mask, LHS, RHS); | |||
18945 | } | |||
18946 | ||||
18947 | // SEXT/TRUNC cases where the mask doesn't match the destination size. | |||
18948 | if (CondEltSize != EltSize) { | |||
18949 | // If we don't have a sign splat, rely on the expansion. | |||
18950 | if (CondEltSize != DAG.ComputeNumSignBits(Cond)) | |||
18951 | return SDValue(); | |||
18952 | ||||
18953 | MVT NewCondSVT = MVT::getIntegerVT(EltSize); | |||
18954 | MVT NewCondVT = MVT::getVectorVT(NewCondSVT, NumElts); | |||
18955 | Cond = DAG.getSExtOrTrunc(Cond, dl, NewCondVT); | |||
18956 | return DAG.getNode(ISD::VSELECT, dl, VT, Cond, LHS, RHS); | |||
18957 | } | |||
18958 | ||||
18959 | // Only some types will be legal on some subtargets. If we can emit a legal | |||
18960 | // VSELECT-matching blend, return Op, and but if we need to expand, return | |||
18961 | // a null value. | |||
18962 | switch (VT.SimpleTy) { | |||
18963 | default: | |||
18964 | // Most of the vector types have blends past SSE4.1. | |||
18965 | return Op; | |||
18966 | ||||
18967 | case MVT::v32i8: | |||
18968 | // The byte blends for AVX vectors were introduced only in AVX2. | |||
18969 | if (Subtarget.hasAVX2()) | |||
18970 | return Op; | |||
18971 | ||||
18972 | return SDValue(); | |||
18973 | ||||
18974 | case MVT::v8i16: | |||
18975 | case MVT::v16i16: { | |||
18976 | // Bitcast everything to the vXi8 type and use a vXi8 vselect. | |||
18977 | MVT CastVT = MVT::getVectorVT(MVT::i8, NumElts * 2); | |||
18978 | Cond = DAG.getBitcast(CastVT, Cond); | |||
18979 | LHS = DAG.getBitcast(CastVT, LHS); | |||
18980 | RHS = DAG.getBitcast(CastVT, RHS); | |||
18981 | SDValue Select = DAG.getNode(ISD::VSELECT, dl, CastVT, Cond, LHS, RHS); | |||
18982 | return DAG.getBitcast(VT, Select); | |||
18983 | } | |||
18984 | } | |||
18985 | } | |||
18986 | ||||
18987 | static SDValue LowerEXTRACT_VECTOR_ELT_SSE4(SDValue Op, SelectionDAG &DAG) { | |||
18988 | MVT VT = Op.getSimpleValueType(); | |||
18989 | SDValue Vec = Op.getOperand(0); | |||
18990 | SDValue Idx = Op.getOperand(1); | |||
18991 | assert(isa<ConstantSDNode>(Idx) && "Constant index expected")(static_cast <bool> (isa<ConstantSDNode>(Idx) && "Constant index expected") ? void (0) : __assert_fail ("isa<ConstantSDNode>(Idx) && \"Constant index expected\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 18991, __extension__ __PRETTY_FUNCTION__)); | |||
18992 | SDLoc dl(Op); | |||
18993 | ||||
18994 | if (!Vec.getSimpleValueType().is128BitVector()) | |||
18995 | return SDValue(); | |||
18996 | ||||
18997 | if (VT.getSizeInBits() == 8) { | |||
18998 | // If IdxVal is 0, it's cheaper to do a move instead of a pextrb, unless | |||
18999 | // we're going to zero extend the register or fold the store. | |||
19000 | if (llvm::isNullConstant(Idx) && !MayFoldIntoZeroExtend(Op) && | |||
19001 | !MayFoldIntoStore(Op)) | |||
19002 | return DAG.getNode(ISD::TRUNCATE, dl, MVT::i8, | |||
19003 | DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32, | |||
19004 | DAG.getBitcast(MVT::v4i32, Vec), Idx)); | |||
19005 | ||||
19006 | unsigned IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue(); | |||
19007 | SDValue Extract = DAG.getNode(X86ISD::PEXTRB, dl, MVT::i32, Vec, | |||
19008 | DAG.getTargetConstant(IdxVal, dl, MVT::i8)); | |||
19009 | return DAG.getNode(ISD::TRUNCATE, dl, VT, Extract); | |||
19010 | } | |||
19011 | ||||
19012 | if (VT == MVT::f32) { | |||
19013 | // EXTRACTPS outputs to a GPR32 register which will require a movd to copy | |||
19014 | // the result back to FR32 register. It's only worth matching if the | |||
19015 | // result has a single use which is a store or a bitcast to i32. And in | |||
19016 | // the case of a store, it's not worth it if the index is a constant 0, | |||
19017 | // because a MOVSSmr can be used instead, which is smaller and faster. | |||
19018 | if (!Op.hasOneUse()) | |||
19019 | return SDValue(); | |||
19020 | SDNode *User = *Op.getNode()->use_begin(); | |||
19021 | if ((User->getOpcode() != ISD::STORE || isNullConstant(Idx)) && | |||
19022 | (User->getOpcode() != ISD::BITCAST || | |||
19023 | User->getValueType(0) != MVT::i32)) | |||
19024 | return SDValue(); | |||
19025 | SDValue Extract = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32, | |||
19026 | DAG.getBitcast(MVT::v4i32, Vec), Idx); | |||
19027 | return DAG.getBitcast(MVT::f32, Extract); | |||
19028 | } | |||
19029 | ||||
19030 | if (VT == MVT::i32 || VT == MVT::i64) | |||
19031 | return Op; | |||
19032 | ||||
19033 | return SDValue(); | |||
19034 | } | |||
19035 | ||||
19036 | /// Extract one bit from mask vector, like v16i1 or v8i1. | |||
19037 | /// AVX-512 feature. | |||
19038 | static SDValue ExtractBitFromMaskVector(SDValue Op, SelectionDAG &DAG, | |||
19039 | const X86Subtarget &Subtarget) { | |||
19040 | SDValue Vec = Op.getOperand(0); | |||
19041 | SDLoc dl(Vec); | |||
19042 | MVT VecVT = Vec.getSimpleValueType(); | |||
19043 | SDValue Idx = Op.getOperand(1); | |||
19044 | auto* IdxC = dyn_cast<ConstantSDNode>(Idx); | |||
19045 | MVT EltVT = Op.getSimpleValueType(); | |||
19046 | ||||
19047 | assert((VecVT.getVectorNumElements() <= 16 || Subtarget.hasBWI()) &&(static_cast <bool> ((VecVT.getVectorNumElements() <= 16 || Subtarget.hasBWI()) && "Unexpected vector type in ExtractBitFromMaskVector" ) ? void (0) : __assert_fail ("(VecVT.getVectorNumElements() <= 16 || Subtarget.hasBWI()) && \"Unexpected vector type in ExtractBitFromMaskVector\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 19048, __extension__ __PRETTY_FUNCTION__)) | |||
19048 | "Unexpected vector type in ExtractBitFromMaskVector")(static_cast <bool> ((VecVT.getVectorNumElements() <= 16 || Subtarget.hasBWI()) && "Unexpected vector type in ExtractBitFromMaskVector" ) ? void (0) : __assert_fail ("(VecVT.getVectorNumElements() <= 16 || Subtarget.hasBWI()) && \"Unexpected vector type in ExtractBitFromMaskVector\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 19048, __extension__ __PRETTY_FUNCTION__)); | |||
19049 | ||||
19050 | // variable index can't be handled in mask registers, | |||
19051 | // extend vector to VR512/128 | |||
19052 | if (!IdxC) { | |||
19053 | unsigned NumElts = VecVT.getVectorNumElements(); | |||
19054 | // Extending v8i1/v16i1 to 512-bit get better performance on KNL | |||
19055 | // than extending to 128/256bit. | |||
19056 | MVT ExtEltVT = (NumElts <= 8) ? MVT::getIntegerVT(128 / NumElts) : MVT::i8; | |||
19057 | MVT ExtVecVT = MVT::getVectorVT(ExtEltVT, NumElts); | |||
19058 | SDValue Ext = DAG.getNode(ISD::SIGN_EXTEND, dl, ExtVecVT, Vec); | |||
19059 | SDValue Elt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, ExtEltVT, Ext, Idx); | |||
19060 | return DAG.getNode(ISD::TRUNCATE, dl, EltVT, Elt); | |||
19061 | } | |||
19062 | ||||
19063 | unsigned IdxVal = IdxC->getZExtValue(); | |||
19064 | if (IdxVal == 0) // the operation is legal | |||
19065 | return Op; | |||
19066 | ||||
19067 | // Extend to natively supported kshift. | |||
19068 | unsigned NumElems = VecVT.getVectorNumElements(); | |||
19069 | MVT WideVecVT = VecVT; | |||
19070 | if ((!Subtarget.hasDQI() && NumElems == 8) || NumElems < 8) { | |||
19071 | WideVecVT = Subtarget.hasDQI() ? MVT::v8i1 : MVT::v16i1; | |||
19072 | Vec = DAG.getNode(ISD::INSERT_SUBVECTOR, dl, WideVecVT, | |||
19073 | DAG.getUNDEF(WideVecVT), Vec, | |||
19074 | DAG.getIntPtrConstant(0, dl)); | |||
19075 | } | |||
19076 | ||||
19077 | // Use kshiftr instruction to move to the lower element. | |||
19078 | Vec = DAG.getNode(X86ISD::KSHIFTR, dl, WideVecVT, Vec, | |||
19079 | DAG.getTargetConstant(IdxVal, dl, MVT::i8)); | |||
19080 | ||||
19081 | return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, Op.getValueType(), Vec, | |||
19082 | DAG.getIntPtrConstant(0, dl)); | |||
19083 | } | |||
19084 | ||||
19085 | SDValue | |||
19086 | X86TargetLowering::LowerEXTRACT_VECTOR_ELT(SDValue Op, | |||
19087 | SelectionDAG &DAG) const { | |||
19088 | SDLoc dl(Op); | |||
19089 | SDValue Vec = Op.getOperand(0); | |||
19090 | MVT VecVT = Vec.getSimpleValueType(); | |||
19091 | SDValue Idx = Op.getOperand(1); | |||
19092 | auto* IdxC = dyn_cast<ConstantSDNode>(Idx); | |||
19093 | ||||
19094 | if (VecVT.getVectorElementType() == MVT::i1) | |||
19095 | return ExtractBitFromMaskVector(Op, DAG, Subtarget); | |||
19096 | ||||
19097 | if (!IdxC) { | |||
19098 | // Its more profitable to go through memory (1 cycles throughput) | |||
19099 | // than using VMOVD + VPERMV/PSHUFB sequence ( 2/3 cycles throughput) | |||
19100 | // IACA tool was used to get performance estimation | |||
19101 | // (https://software.intel.com/en-us/articles/intel-architecture-code-analyzer) | |||
19102 | // | |||
19103 | // example : extractelement <16 x i8> %a, i32 %i | |||
19104 | // | |||
19105 | // Block Throughput: 3.00 Cycles | |||
19106 | // Throughput Bottleneck: Port5 | |||
19107 | // | |||
19108 | // | Num Of | Ports pressure in cycles | | | |||
19109 | // | Uops | 0 - DV | 5 | 6 | 7 | | | |||
19110 | // --------------------------------------------- | |||
19111 | // | 1 | | 1.0 | | | CP | vmovd xmm1, edi | |||
19112 | // | 1 | | 1.0 | | | CP | vpshufb xmm0, xmm0, xmm1 | |||
19113 | // | 2 | 1.0 | 1.0 | | | CP | vpextrb eax, xmm0, 0x0 | |||
19114 | // Total Num Of Uops: 4 | |||
19115 | // | |||
19116 | // | |||
19117 | // Block Throughput: 1.00 Cycles | |||
19118 | // Throughput Bottleneck: PORT2_AGU, PORT3_AGU, Port4 | |||
19119 | // | |||
19120 | // | | Ports pressure in cycles | | | |||
19121 | // |Uops| 1 | 2 - D |3 - D | 4 | 5 | | | |||
19122 | // --------------------------------------------------------- | |||
19123 | // |2^ | | 0.5 | 0.5 |1.0| |CP| vmovaps xmmword ptr [rsp-0x18], xmm0 | |||
19124 | // |1 |0.5| | | |0.5| | lea rax, ptr [rsp-0x18] | |||
19125 | // |1 | |0.5, 0.5|0.5, 0.5| | |CP| mov al, byte ptr [rdi+rax*1] | |||
19126 | // Total Num Of Uops: 4 | |||
19127 | ||||
19128 | return SDValue(); | |||
19129 | } | |||
19130 | ||||
19131 | unsigned IdxVal = IdxC->getZExtValue(); | |||
19132 | ||||
19133 | // If this is a 256-bit vector result, first extract the 128-bit vector and | |||
19134 | // then extract the element from the 128-bit vector. | |||
19135 | if (VecVT.is256BitVector() || VecVT.is512BitVector()) { | |||
19136 | // Get the 128-bit vector. | |||
19137 | Vec = extract128BitVector(Vec, IdxVal, DAG, dl); | |||
19138 | MVT EltVT = VecVT.getVectorElementType(); | |||
19139 | ||||
19140 | unsigned ElemsPerChunk = 128 / EltVT.getSizeInBits(); | |||
19141 | assert(isPowerOf2_32(ElemsPerChunk) && "Elements per chunk not power of 2")(static_cast <bool> (isPowerOf2_32(ElemsPerChunk) && "Elements per chunk not power of 2") ? void (0) : __assert_fail ("isPowerOf2_32(ElemsPerChunk) && \"Elements per chunk not power of 2\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 19141, __extension__ __PRETTY_FUNCTION__)); | |||
19142 | ||||
19143 | // Find IdxVal modulo ElemsPerChunk. Since ElemsPerChunk is a power of 2 | |||
19144 | // this can be done with a mask. | |||
19145 | IdxVal &= ElemsPerChunk - 1; | |||
19146 | return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, Op.getValueType(), Vec, | |||
19147 | DAG.getIntPtrConstant(IdxVal, dl)); | |||
19148 | } | |||
19149 | ||||
19150 | assert(VecVT.is128BitVector() && "Unexpected vector length")(static_cast <bool> (VecVT.is128BitVector() && "Unexpected vector length" ) ? void (0) : __assert_fail ("VecVT.is128BitVector() && \"Unexpected vector length\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 19150, __extension__ __PRETTY_FUNCTION__)); | |||
19151 | ||||
19152 | MVT VT = Op.getSimpleValueType(); | |||
19153 | ||||
19154 | if (VT == MVT::i16) { | |||
19155 | // If IdxVal is 0, it's cheaper to do a move instead of a pextrw, unless | |||
19156 | // we're going to zero extend the register or fold the store (SSE41 only). | |||
19157 | if (IdxVal == 0 && !MayFoldIntoZeroExtend(Op) && | |||
19158 | !(Subtarget.hasSSE41() && MayFoldIntoStore(Op))) { | |||
19159 | if (Subtarget.hasFP16()) | |||
19160 | return Op; | |||
19161 | ||||
19162 | return DAG.getNode(ISD::TRUNCATE, dl, MVT::i16, | |||
19163 | DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32, | |||
19164 | DAG.getBitcast(MVT::v4i32, Vec), Idx)); | |||
19165 | } | |||
19166 | ||||
19167 | SDValue Extract = DAG.getNode(X86ISD::PEXTRW, dl, MVT::i32, Vec, | |||
19168 | DAG.getTargetConstant(IdxVal, dl, MVT::i8)); | |||
19169 | return DAG.getNode(ISD::TRUNCATE, dl, VT, Extract); | |||
19170 | } | |||
19171 | ||||
19172 | if (Subtarget.hasSSE41()) | |||
19173 | if (SDValue Res = LowerEXTRACT_VECTOR_ELT_SSE4(Op, DAG)) | |||
19174 | return Res; | |||
19175 | ||||
19176 | // TODO: We only extract a single element from v16i8, we can probably afford | |||
19177 | // to be more aggressive here before using the default approach of spilling to | |||
19178 | // stack. | |||
19179 | if (VT.getSizeInBits() == 8 && Op->isOnlyUserOf(Vec.getNode())) { | |||
19180 | // Extract either the lowest i32 or any i16, and extract the sub-byte. | |||
19181 | int DWordIdx = IdxVal / 4; | |||
19182 | if (DWordIdx == 0) { | |||
19183 | SDValue Res = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32, | |||
19184 | DAG.getBitcast(MVT::v4i32, Vec), | |||
19185 | DAG.getIntPtrConstant(DWordIdx, dl)); | |||
19186 | int ShiftVal = (IdxVal % 4) * 8; | |||
19187 | if (ShiftVal != 0) | |||
19188 | Res = DAG.getNode(ISD::SRL, dl, MVT::i32, Res, | |||
19189 | DAG.getConstant(ShiftVal, dl, MVT::i8)); | |||
19190 | return DAG.getNode(ISD::TRUNCATE, dl, VT, Res); | |||
19191 | } | |||
19192 | ||||
19193 | int WordIdx = IdxVal / 2; | |||
19194 | SDValue Res = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, | |||
19195 | DAG.getBitcast(MVT::v8i16, Vec), | |||
19196 | DAG.getIntPtrConstant(WordIdx, dl)); | |||
19197 | int ShiftVal = (IdxVal % 2) * 8; | |||
19198 | if (ShiftVal != 0) | |||
19199 | Res = DAG.getNode(ISD::SRL, dl, MVT::i16, Res, | |||
19200 | DAG.getConstant(ShiftVal, dl, MVT::i8)); | |||
19201 | return DAG.getNode(ISD::TRUNCATE, dl, VT, Res); | |||
19202 | } | |||
19203 | ||||
19204 | if (VT == MVT::f16 || VT.getSizeInBits() == 32) { | |||
19205 | if (IdxVal == 0) | |||
19206 | return Op; | |||
19207 | ||||
19208 | // Shuffle the element to the lowest element, then movss or movsh. | |||
19209 | SmallVector<int, 8> Mask(VecVT.getVectorNumElements(), -1); | |||
19210 | Mask[0] = static_cast<int>(IdxVal); | |||
19211 | Vec = DAG.getVectorShuffle(VecVT, dl, Vec, DAG.getUNDEF(VecVT), Mask); | |||
19212 | return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, VT, Vec, | |||
19213 | DAG.getIntPtrConstant(0, dl)); | |||
19214 | } | |||
19215 | ||||
19216 | if (VT.getSizeInBits() == 64) { | |||
19217 | // FIXME: .td only matches this for <2 x f64>, not <2 x i64> on 32b | |||
19218 | // FIXME: seems like this should be unnecessary if mov{h,l}pd were taught | |||
19219 | // to match extract_elt for f64. | |||
19220 | if (IdxVal == 0) | |||
19221 | return Op; | |||
19222 | ||||
19223 | // UNPCKHPD the element to the lowest double word, then movsd. | |||
19224 | // Note if the lower 64 bits of the result of the UNPCKHPD is then stored | |||
19225 | // to a f64mem, the whole operation is folded into a single MOVHPDmr. | |||
19226 | int Mask[2] = { 1, -1 }; | |||
19227 | Vec = DAG.getVectorShuffle(VecVT, dl, Vec, DAG.getUNDEF(VecVT), Mask); | |||
19228 | return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, VT, Vec, | |||
19229 | DAG.getIntPtrConstant(0, dl)); | |||
19230 | } | |||
19231 | ||||
19232 | return SDValue(); | |||
19233 | } | |||
19234 | ||||
19235 | /// Insert one bit to mask vector, like v16i1 or v8i1. | |||
19236 | /// AVX-512 feature. | |||
19237 | static SDValue InsertBitToMaskVector(SDValue Op, SelectionDAG &DAG, | |||
19238 | const X86Subtarget &Subtarget) { | |||
19239 | SDLoc dl(Op); | |||
19240 | SDValue Vec = Op.getOperand(0); | |||
19241 | SDValue Elt = Op.getOperand(1); | |||
19242 | SDValue Idx = Op.getOperand(2); | |||
19243 | MVT VecVT = Vec.getSimpleValueType(); | |||
19244 | ||||
19245 | if (!isa<ConstantSDNode>(Idx)) { | |||
19246 | // Non constant index. Extend source and destination, | |||
19247 | // insert element and then truncate the result. | |||
19248 | unsigned NumElts = VecVT.getVectorNumElements(); | |||
19249 | MVT ExtEltVT = (NumElts <= 8) ? MVT::getIntegerVT(128 / NumElts) : MVT::i8; | |||
19250 | MVT ExtVecVT = MVT::getVectorVT(ExtEltVT, NumElts); | |||
19251 | SDValue ExtOp = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, ExtVecVT, | |||
19252 | DAG.getNode(ISD::SIGN_EXTEND, dl, ExtVecVT, Vec), | |||
19253 | DAG.getNode(ISD::SIGN_EXTEND, dl, ExtEltVT, Elt), Idx); | |||
19254 | return DAG.getNode(ISD::TRUNCATE, dl, VecVT, ExtOp); | |||
19255 | } | |||
19256 | ||||
19257 | // Copy into a k-register, extract to v1i1 and insert_subvector. | |||
19258 | SDValue EltInVec = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v1i1, Elt); | |||
19259 | return DAG.getNode(ISD::INSERT_SUBVECTOR, dl, VecVT, Vec, EltInVec, Idx); | |||
19260 | } | |||
19261 | ||||
19262 | SDValue X86TargetLowering::LowerINSERT_VECTOR_ELT(SDValue Op, | |||
19263 | SelectionDAG &DAG) const { | |||
19264 | MVT VT = Op.getSimpleValueType(); | |||
19265 | MVT EltVT = VT.getVectorElementType(); | |||
19266 | unsigned NumElts = VT.getVectorNumElements(); | |||
19267 | unsigned EltSizeInBits = EltVT.getScalarSizeInBits(); | |||
19268 | ||||
19269 | if (EltVT == MVT::i1) | |||
19270 | return InsertBitToMaskVector(Op, DAG, Subtarget); | |||
19271 | ||||
19272 | SDLoc dl(Op); | |||
19273 | SDValue N0 = Op.getOperand(0); | |||
19274 | SDValue N1 = Op.getOperand(1); | |||
19275 | SDValue N2 = Op.getOperand(2); | |||
19276 | auto *N2C = dyn_cast<ConstantSDNode>(N2); | |||
19277 | ||||
19278 | if (!N2C) { | |||
19279 | // Variable insertion indices, usually we're better off spilling to stack, | |||
19280 | // but AVX512 can use a variable compare+select by comparing against all | |||
19281 | // possible vector indices, and FP insertion has less gpr->simd traffic. | |||
19282 | if (!(Subtarget.hasBWI() || | |||
19283 | (Subtarget.hasAVX512() && EltSizeInBits >= 32) || | |||
19284 | (Subtarget.hasSSE41() && VT.isFloatingPoint()))) | |||
19285 | return SDValue(); | |||
19286 | ||||
19287 | MVT IdxSVT = MVT::getIntegerVT(EltSizeInBits); | |||
19288 | MVT IdxVT = MVT::getVectorVT(IdxSVT, NumElts); | |||
19289 | if (!isTypeLegal(IdxSVT) || !isTypeLegal(IdxVT)) | |||
19290 | return SDValue(); | |||
19291 | ||||
19292 | SDValue IdxExt = DAG.getZExtOrTrunc(N2, dl, IdxSVT); | |||
19293 | SDValue IdxSplat = DAG.getSplatBuildVector(IdxVT, dl, IdxExt); | |||
19294 | SDValue EltSplat = DAG.getSplatBuildVector(VT, dl, N1); | |||
19295 | ||||
19296 | SmallVector<SDValue, 16> RawIndices; | |||
19297 | for (unsigned I = 0; I != NumElts; ++I) | |||
19298 | RawIndices.push_back(DAG.getConstant(I, dl, IdxSVT)); | |||
19299 | SDValue Indices = DAG.getBuildVector(IdxVT, dl, RawIndices); | |||
19300 | ||||
19301 | // inselt N0, N1, N2 --> select (SplatN2 == {0,1,2...}) ? SplatN1 : N0. | |||
19302 | return DAG.getSelectCC(dl, IdxSplat, Indices, EltSplat, N0, | |||
19303 | ISD::CondCode::SETEQ); | |||
19304 | } | |||
19305 | ||||
19306 | if (N2C->getAPIntValue().uge(NumElts)) | |||
19307 | return SDValue(); | |||
19308 | uint64_t IdxVal = N2C->getZExtValue(); | |||
19309 | ||||
19310 | bool IsZeroElt = X86::isZeroNode(N1); | |||
19311 | bool IsAllOnesElt = VT.isInteger() && llvm::isAllOnesConstant(N1); | |||
19312 | ||||
19313 | // If we are inserting a element, see if we can do this more efficiently with | |||
19314 | // a blend shuffle with a rematerializable vector than a costly integer | |||
19315 | // insertion. | |||
19316 | if ((IsZeroElt || IsAllOnesElt) && Subtarget.hasSSE41() && | |||
19317 | (16 <= EltSizeInBits || (IsZeroElt && !VT.is128BitVector()))) { | |||
19318 | SmallVector<int, 8> BlendMask; | |||
19319 | for (unsigned i = 0; i != NumElts; ++i) | |||
19320 | BlendMask.push_back(i == IdxVal ? i + NumElts : i); | |||
19321 | SDValue CstVector = IsZeroElt ? getZeroVector(VT, Subtarget, DAG, dl) | |||
19322 | : getOnesVector(VT, DAG, dl); | |||
19323 | return DAG.getVectorShuffle(VT, dl, N0, CstVector, BlendMask); | |||
19324 | } | |||
19325 | ||||
19326 | // If the vector is wider than 128 bits, extract the 128-bit subvector, insert | |||
19327 | // into that, and then insert the subvector back into the result. | |||
19328 | if (VT.is256BitVector() || VT.is512BitVector()) { | |||
19329 | // With a 256-bit vector, we can insert into the zero element efficiently | |||
19330 | // using a blend if we have AVX or AVX2 and the right data type. | |||
19331 | if (VT.is256BitVector() && IdxVal == 0) { | |||
19332 | // TODO: It is worthwhile to cast integer to floating point and back | |||
19333 | // and incur a domain crossing penalty if that's what we'll end up | |||
19334 | // doing anyway after extracting to a 128-bit vector. | |||
19335 | if ((Subtarget.hasAVX() && (EltVT == MVT::f64 || EltVT == MVT::f32)) || | |||
19336 | (Subtarget.hasAVX2() && EltVT == MVT::i32)) { | |||
19337 | SDValue N1Vec = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, N1); | |||
19338 | return DAG.getNode(X86ISD::BLENDI, dl, VT, N0, N1Vec, | |||
19339 | DAG.getTargetConstant(1, dl, MVT::i8)); | |||
19340 | } | |||
19341 | } | |||
19342 | ||||
19343 | unsigned NumEltsIn128 = 128 / EltSizeInBits; | |||
19344 | assert(isPowerOf2_32(NumEltsIn128) &&(static_cast <bool> (isPowerOf2_32(NumEltsIn128) && "Vectors will always have power-of-two number of elements.") ? void (0) : __assert_fail ("isPowerOf2_32(NumEltsIn128) && \"Vectors will always have power-of-two number of elements.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 19345, __extension__ __PRETTY_FUNCTION__)) | |||
19345 | "Vectors will always have power-of-two number of elements.")(static_cast <bool> (isPowerOf2_32(NumEltsIn128) && "Vectors will always have power-of-two number of elements.") ? void (0) : __assert_fail ("isPowerOf2_32(NumEltsIn128) && \"Vectors will always have power-of-two number of elements.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 19345, __extension__ __PRETTY_FUNCTION__)); | |||
19346 | ||||
19347 | // If we are not inserting into the low 128-bit vector chunk, | |||
19348 | // then prefer the broadcast+blend sequence. | |||
19349 | // FIXME: relax the profitability check iff all N1 uses are insertions. | |||
19350 | if (!VT.is128BitVector() && IdxVal >= NumEltsIn128 && | |||
19351 | ((Subtarget.hasAVX2() && EltSizeInBits != 8) || | |||
19352 | (Subtarget.hasAVX() && (EltSizeInBits >= 32) && MayFoldLoad(N1)))) { | |||
19353 | SDValue N1SplatVec = DAG.getSplatBuildVector(VT, dl, N1); | |||
19354 | SmallVector<int, 8> BlendMask; | |||
19355 | for (unsigned i = 0; i != NumElts; ++i) | |||
19356 | BlendMask.push_back(i == IdxVal ? i + NumElts : i); | |||
19357 | return DAG.getVectorShuffle(VT, dl, N0, N1SplatVec, BlendMask); | |||
19358 | } | |||
19359 | ||||
19360 | // Get the desired 128-bit vector chunk. | |||
19361 | SDValue V = extract128BitVector(N0, IdxVal, DAG, dl); | |||
19362 | ||||
19363 | // Insert the element into the desired chunk. | |||
19364 | // Since NumEltsIn128 is a power of 2 we can use mask instead of modulo. | |||
19365 | unsigned IdxIn128 = IdxVal & (NumEltsIn128 - 1); | |||
19366 | ||||
19367 | V = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, V.getValueType(), V, N1, | |||
19368 | DAG.getIntPtrConstant(IdxIn128, dl)); | |||
19369 | ||||
19370 | // Insert the changed part back into the bigger vector | |||
19371 | return insert128BitVector(N0, V, IdxVal, DAG, dl); | |||
19372 | } | |||
19373 | assert(VT.is128BitVector() && "Only 128-bit vector types should be left!")(static_cast <bool> (VT.is128BitVector() && "Only 128-bit vector types should be left!" ) ? void (0) : __assert_fail ("VT.is128BitVector() && \"Only 128-bit vector types should be left!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 19373, __extension__ __PRETTY_FUNCTION__)); | |||
19374 | ||||
19375 | // This will be just movw/movd/movq/movsh/movss/movsd. | |||
19376 | if (IdxVal == 0 && ISD::isBuildVectorAllZeros(N0.getNode())) { | |||
19377 | if (EltVT == MVT::i32 || EltVT == MVT::f32 || EltVT == MVT::f64 || | |||
19378 | EltVT == MVT::f16 || EltVT == MVT::i64) { | |||
19379 | N1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, N1); | |||
19380 | return getShuffleVectorZeroOrUndef(N1, 0, true, Subtarget, DAG); | |||
19381 | } | |||
19382 | ||||
19383 | // We can't directly insert an i8 or i16 into a vector, so zero extend | |||
19384 | // it to i32 first. | |||
19385 | if (EltVT == MVT::i16 || EltVT == MVT::i8) { | |||
19386 | N1 = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, N1); | |||
19387 | MVT ShufVT = MVT::getVectorVT(MVT::i32, VT.getSizeInBits() / 32); | |||
19388 | N1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, ShufVT, N1); | |||
19389 | N1 = getShuffleVectorZeroOrUndef(N1, 0, true, Subtarget, DAG); | |||
19390 | return DAG.getBitcast(VT, N1); | |||
19391 | } | |||
19392 | } | |||
19393 | ||||
19394 | // Transform it so it match pinsr{b,w} which expects a GR32 as its second | |||
19395 | // argument. SSE41 required for pinsrb. | |||
19396 | if (VT == MVT::v8i16 || (VT == MVT::v16i8 && Subtarget.hasSSE41())) { | |||
19397 | unsigned Opc; | |||
19398 | if (VT == MVT::v8i16) { | |||
19399 | assert(Subtarget.hasSSE2() && "SSE2 required for PINSRW")(static_cast <bool> (Subtarget.hasSSE2() && "SSE2 required for PINSRW" ) ? void (0) : __assert_fail ("Subtarget.hasSSE2() && \"SSE2 required for PINSRW\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 19399, __extension__ __PRETTY_FUNCTION__)); | |||
19400 | Opc = X86ISD::PINSRW; | |||
19401 | } else { | |||
19402 | assert(VT == MVT::v16i8 && "PINSRB requires v16i8 vector")(static_cast <bool> (VT == MVT::v16i8 && "PINSRB requires v16i8 vector" ) ? void (0) : __assert_fail ("VT == MVT::v16i8 && \"PINSRB requires v16i8 vector\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 19402, __extension__ __PRETTY_FUNCTION__)); | |||
19403 | assert(Subtarget.hasSSE41() && "SSE41 required for PINSRB")(static_cast <bool> (Subtarget.hasSSE41() && "SSE41 required for PINSRB" ) ? void (0) : __assert_fail ("Subtarget.hasSSE41() && \"SSE41 required for PINSRB\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 19403, __extension__ __PRETTY_FUNCTION__)); | |||
19404 | Opc = X86ISD::PINSRB; | |||
19405 | } | |||
19406 | ||||
19407 | assert(N1.getValueType() != MVT::i32 && "Unexpected VT")(static_cast <bool> (N1.getValueType() != MVT::i32 && "Unexpected VT") ? void (0) : __assert_fail ("N1.getValueType() != MVT::i32 && \"Unexpected VT\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 19407, __extension__ __PRETTY_FUNCTION__)); | |||
19408 | N1 = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, N1); | |||
19409 | N2 = DAG.getTargetConstant(IdxVal, dl, MVT::i8); | |||
19410 | return DAG.getNode(Opc, dl, VT, N0, N1, N2); | |||
19411 | } | |||
19412 | ||||
19413 | if (Subtarget.hasSSE41()) { | |||
19414 | if (EltVT == MVT::f32) { | |||
19415 | // Bits [7:6] of the constant are the source select. This will always be | |||
19416 | // zero here. The DAG Combiner may combine an extract_elt index into | |||
19417 | // these bits. For example (insert (extract, 3), 2) could be matched by | |||
19418 | // putting the '3' into bits [7:6] of X86ISD::INSERTPS. | |||
19419 | // Bits [5:4] of the constant are the destination select. This is the | |||
19420 | // value of the incoming immediate. | |||
19421 | // Bits [3:0] of the constant are the zero mask. The DAG Combiner may | |||
19422 | // combine either bitwise AND or insert of float 0.0 to set these bits. | |||
19423 | ||||
19424 | bool MinSize = DAG.getMachineFunction().getFunction().hasMinSize(); | |||
19425 | if (IdxVal == 0 && (!MinSize || !MayFoldLoad(N1))) { | |||
19426 | // If this is an insertion of 32-bits into the low 32-bits of | |||
19427 | // a vector, we prefer to generate a blend with immediate rather | |||
19428 | // than an insertps. Blends are simpler operations in hardware and so | |||
19429 | // will always have equal or better performance than insertps. | |||
19430 | // But if optimizing for size and there's a load folding opportunity, | |||
19431 | // generate insertps because blendps does not have a 32-bit memory | |||
19432 | // operand form. | |||
19433 | N1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4f32, N1); | |||
19434 | return DAG.getNode(X86ISD::BLENDI, dl, VT, N0, N1, | |||
19435 | DAG.getTargetConstant(1, dl, MVT::i8)); | |||
19436 | } | |||
19437 | // Create this as a scalar to vector.. | |||
19438 | N1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4f32, N1); | |||
19439 | return DAG.getNode(X86ISD::INSERTPS, dl, VT, N0, N1, | |||
19440 | DAG.getTargetConstant(IdxVal << 4, dl, MVT::i8)); | |||
19441 | } | |||
19442 | ||||
19443 | // PINSR* works with constant index. | |||
19444 | if (EltVT == MVT::i32 || EltVT == MVT::i64) | |||
19445 | return Op; | |||
19446 | } | |||
19447 | ||||
19448 | return SDValue(); | |||
19449 | } | |||
19450 | ||||
19451 | static SDValue LowerSCALAR_TO_VECTOR(SDValue Op, const X86Subtarget &Subtarget, | |||
19452 | SelectionDAG &DAG) { | |||
19453 | SDLoc dl(Op); | |||
19454 | MVT OpVT = Op.getSimpleValueType(); | |||
19455 | ||||
19456 | // It's always cheaper to replace a xor+movd with xorps and simplifies further | |||
19457 | // combines. | |||
19458 | if (X86::isZeroNode(Op.getOperand(0))) | |||
19459 | return getZeroVector(OpVT, Subtarget, DAG, dl); | |||
19460 | ||||
19461 | // If this is a 256-bit vector result, first insert into a 128-bit | |||
19462 | // vector and then insert into the 256-bit vector. | |||
19463 | if (!OpVT.is128BitVector()) { | |||
19464 | // Insert into a 128-bit vector. | |||
19465 | unsigned SizeFactor = OpVT.getSizeInBits() / 128; | |||
19466 | MVT VT128 = MVT::getVectorVT(OpVT.getVectorElementType(), | |||
19467 | OpVT.getVectorNumElements() / SizeFactor); | |||
19468 | ||||
19469 | Op = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT128, Op.getOperand(0)); | |||
19470 | ||||
19471 | // Insert the 128-bit vector. | |||
19472 | return insert128BitVector(DAG.getUNDEF(OpVT), Op, 0, DAG, dl); | |||
19473 | } | |||
19474 | assert(OpVT.is128BitVector() && OpVT.isInteger() && OpVT != MVT::v2i64 &&(static_cast <bool> (OpVT.is128BitVector() && OpVT .isInteger() && OpVT != MVT::v2i64 && "Expected an SSE type!" ) ? void (0) : __assert_fail ("OpVT.is128BitVector() && OpVT.isInteger() && OpVT != MVT::v2i64 && \"Expected an SSE type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 19475, __extension__ __PRETTY_FUNCTION__)) | |||
19475 | "Expected an SSE type!")(static_cast <bool> (OpVT.is128BitVector() && OpVT .isInteger() && OpVT != MVT::v2i64 && "Expected an SSE type!" ) ? void (0) : __assert_fail ("OpVT.is128BitVector() && OpVT.isInteger() && OpVT != MVT::v2i64 && \"Expected an SSE type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 19475, __extension__ __PRETTY_FUNCTION__)); | |||
19476 | ||||
19477 | // Pass through a v4i32 or V8i16 SCALAR_TO_VECTOR as that's what we use in | |||
19478 | // tblgen. | |||
19479 | if (OpVT == MVT::v4i32 || (OpVT == MVT::v8i16 && Subtarget.hasFP16())) | |||
19480 | return Op; | |||
19481 | ||||
19482 | SDValue AnyExt = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, Op.getOperand(0)); | |||
19483 | return DAG.getBitcast( | |||
19484 | OpVT, DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32, AnyExt)); | |||
19485 | } | |||
19486 | ||||
19487 | // Lower a node with an INSERT_SUBVECTOR opcode. This may result in a | |||
19488 | // simple superregister reference or explicit instructions to insert | |||
19489 | // the upper bits of a vector. | |||
19490 | static SDValue LowerINSERT_SUBVECTOR(SDValue Op, const X86Subtarget &Subtarget, | |||
19491 | SelectionDAG &DAG) { | |||
19492 | assert(Op.getSimpleValueType().getVectorElementType() == MVT::i1)(static_cast <bool> (Op.getSimpleValueType().getVectorElementType () == MVT::i1) ? void (0) : __assert_fail ("Op.getSimpleValueType().getVectorElementType() == MVT::i1" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 19492, __extension__ __PRETTY_FUNCTION__)); | |||
19493 | ||||
19494 | return insert1BitVector(Op, DAG, Subtarget); | |||
19495 | } | |||
19496 | ||||
19497 | static SDValue LowerEXTRACT_SUBVECTOR(SDValue Op, const X86Subtarget &Subtarget, | |||
19498 | SelectionDAG &DAG) { | |||
19499 | assert(Op.getSimpleValueType().getVectorElementType() == MVT::i1 &&(static_cast <bool> (Op.getSimpleValueType().getVectorElementType () == MVT::i1 && "Only vXi1 extract_subvectors need custom lowering" ) ? void (0) : __assert_fail ("Op.getSimpleValueType().getVectorElementType() == MVT::i1 && \"Only vXi1 extract_subvectors need custom lowering\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 19500, __extension__ __PRETTY_FUNCTION__)) | |||
19500 | "Only vXi1 extract_subvectors need custom lowering")(static_cast <bool> (Op.getSimpleValueType().getVectorElementType () == MVT::i1 && "Only vXi1 extract_subvectors need custom lowering" ) ? void (0) : __assert_fail ("Op.getSimpleValueType().getVectorElementType() == MVT::i1 && \"Only vXi1 extract_subvectors need custom lowering\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 19500, __extension__ __PRETTY_FUNCTION__)); | |||
19501 | ||||
19502 | SDLoc dl(Op); | |||
19503 | SDValue Vec = Op.getOperand(0); | |||
19504 | uint64_t IdxVal = Op.getConstantOperandVal(1); | |||
19505 | ||||
19506 | if (IdxVal == 0) // the operation is legal | |||
19507 | return Op; | |||
19508 | ||||
19509 | MVT VecVT = Vec.getSimpleValueType(); | |||
19510 | unsigned NumElems = VecVT.getVectorNumElements(); | |||
19511 | ||||
19512 | // Extend to natively supported kshift. | |||
19513 | MVT WideVecVT = VecVT; | |||
19514 | if ((!Subtarget.hasDQI() && NumElems == 8) || NumElems < 8) { | |||
19515 | WideVecVT = Subtarget.hasDQI() ? MVT::v8i1 : MVT::v16i1; | |||
19516 | Vec = DAG.getNode(ISD::INSERT_SUBVECTOR, dl, WideVecVT, | |||
19517 | DAG.getUNDEF(WideVecVT), Vec, | |||
19518 | DAG.getIntPtrConstant(0, dl)); | |||
19519 | } | |||
19520 | ||||
19521 | // Shift to the LSB. | |||
19522 | Vec = DAG.getNode(X86ISD::KSHIFTR, dl, WideVecVT, Vec, | |||
19523 | DAG.getTargetConstant(IdxVal, dl, MVT::i8)); | |||
19524 | ||||
19525 | return DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, Op.getValueType(), Vec, | |||
19526 | DAG.getIntPtrConstant(0, dl)); | |||
19527 | } | |||
19528 | ||||
19529 | // Returns the appropriate wrapper opcode for a global reference. | |||
19530 | unsigned X86TargetLowering::getGlobalWrapperKind( | |||
19531 | const GlobalValue *GV, const unsigned char OpFlags) const { | |||
19532 | // References to absolute symbols are never PC-relative. | |||
19533 | if (GV && GV->isAbsoluteSymbolRef()) | |||
19534 | return X86ISD::Wrapper; | |||
19535 | ||||
19536 | CodeModel::Model M = getTargetMachine().getCodeModel(); | |||
19537 | if (Subtarget.isPICStyleRIPRel() && | |||
19538 | (M == CodeModel::Small || M == CodeModel::Kernel)) | |||
19539 | return X86ISD::WrapperRIP; | |||
19540 | ||||
19541 | // GOTPCREL references must always use RIP. | |||
19542 | if (OpFlags == X86II::MO_GOTPCREL) | |||
19543 | return X86ISD::WrapperRIP; | |||
19544 | ||||
19545 | return X86ISD::Wrapper; | |||
19546 | } | |||
19547 | ||||
19548 | // ConstantPool, JumpTable, GlobalAddress, and ExternalSymbol are lowered as | |||
19549 | // their target counterpart wrapped in the X86ISD::Wrapper node. Suppose N is | |||
19550 | // one of the above mentioned nodes. It has to be wrapped because otherwise | |||
19551 | // Select(N) returns N. So the raw TargetGlobalAddress nodes, etc. can only | |||
19552 | // be used to form addressing mode. These wrapped nodes will be selected | |||
19553 | // into MOV32ri. | |||
19554 | SDValue | |||
19555 | X86TargetLowering::LowerConstantPool(SDValue Op, SelectionDAG &DAG) const { | |||
19556 | ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op); | |||
19557 | ||||
19558 | // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the | |||
19559 | // global base reg. | |||
19560 | unsigned char OpFlag = Subtarget.classifyLocalReference(nullptr); | |||
19561 | ||||
19562 | auto PtrVT = getPointerTy(DAG.getDataLayout()); | |||
19563 | SDValue Result = DAG.getTargetConstantPool( | |||
19564 | CP->getConstVal(), PtrVT, CP->getAlign(), CP->getOffset(), OpFlag); | |||
19565 | SDLoc DL(CP); | |||
19566 | Result = DAG.getNode(getGlobalWrapperKind(), DL, PtrVT, Result); | |||
19567 | // With PIC, the address is actually $g + Offset. | |||
19568 | if (OpFlag) { | |||
19569 | Result = | |||
19570 | DAG.getNode(ISD::ADD, DL, PtrVT, | |||
19571 | DAG.getNode(X86ISD::GlobalBaseReg, SDLoc(), PtrVT), Result); | |||
19572 | } | |||
19573 | ||||
19574 | return Result; | |||
19575 | } | |||
19576 | ||||
19577 | SDValue X86TargetLowering::LowerJumpTable(SDValue Op, SelectionDAG &DAG) const { | |||
19578 | JumpTableSDNode *JT = cast<JumpTableSDNode>(Op); | |||
19579 | ||||
19580 | // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the | |||
19581 | // global base reg. | |||
19582 | unsigned char OpFlag = Subtarget.classifyLocalReference(nullptr); | |||
19583 | ||||
19584 | auto PtrVT = getPointerTy(DAG.getDataLayout()); | |||
19585 | SDValue Result = DAG.getTargetJumpTable(JT->getIndex(), PtrVT, OpFlag); | |||
19586 | SDLoc DL(JT); | |||
19587 | Result = DAG.getNode(getGlobalWrapperKind(), DL, PtrVT, Result); | |||
19588 | ||||
19589 | // With PIC, the address is actually $g + Offset. | |||
19590 | if (OpFlag) | |||
19591 | Result = | |||
19592 | DAG.getNode(ISD::ADD, DL, PtrVT, | |||
19593 | DAG.getNode(X86ISD::GlobalBaseReg, SDLoc(), PtrVT), Result); | |||
19594 | ||||
19595 | return Result; | |||
19596 | } | |||
19597 | ||||
19598 | SDValue X86TargetLowering::LowerExternalSymbol(SDValue Op, | |||
19599 | SelectionDAG &DAG) const { | |||
19600 | return LowerGlobalOrExternal(Op, DAG, /*ForCall=*/false); | |||
19601 | } | |||
19602 | ||||
19603 | SDValue | |||
19604 | X86TargetLowering::LowerBlockAddress(SDValue Op, SelectionDAG &DAG) const { | |||
19605 | // Create the TargetBlockAddressAddress node. | |||
19606 | unsigned char OpFlags = | |||
19607 | Subtarget.classifyBlockAddressReference(); | |||
19608 | const BlockAddress *BA = cast<BlockAddressSDNode>(Op)->getBlockAddress(); | |||
19609 | int64_t Offset = cast<BlockAddressSDNode>(Op)->getOffset(); | |||
19610 | SDLoc dl(Op); | |||
19611 | auto PtrVT = getPointerTy(DAG.getDataLayout()); | |||
19612 | SDValue Result = DAG.getTargetBlockAddress(BA, PtrVT, Offset, OpFlags); | |||
19613 | Result = DAG.getNode(getGlobalWrapperKind(), dl, PtrVT, Result); | |||
19614 | ||||
19615 | // With PIC, the address is actually $g + Offset. | |||
19616 | if (isGlobalRelativeToPICBase(OpFlags)) { | |||
19617 | Result = DAG.getNode(ISD::ADD, dl, PtrVT, | |||
19618 | DAG.getNode(X86ISD::GlobalBaseReg, dl, PtrVT), Result); | |||
19619 | } | |||
19620 | ||||
19621 | return Result; | |||
19622 | } | |||
19623 | ||||
19624 | /// Creates target global address or external symbol nodes for calls or | |||
19625 | /// other uses. | |||
19626 | SDValue X86TargetLowering::LowerGlobalOrExternal(SDValue Op, SelectionDAG &DAG, | |||
19627 | bool ForCall) const { | |||
19628 | // Unpack the global address or external symbol. | |||
19629 | const SDLoc &dl = SDLoc(Op); | |||
19630 | const GlobalValue *GV = nullptr; | |||
19631 | int64_t Offset = 0; | |||
19632 | const char *ExternalSym = nullptr; | |||
19633 | if (const auto *G = dyn_cast<GlobalAddressSDNode>(Op)) { | |||
19634 | GV = G->getGlobal(); | |||
19635 | Offset = G->getOffset(); | |||
19636 | } else { | |||
19637 | const auto *ES = cast<ExternalSymbolSDNode>(Op); | |||
19638 | ExternalSym = ES->getSymbol(); | |||
19639 | } | |||
19640 | ||||
19641 | // Calculate some flags for address lowering. | |||
19642 | const Module &Mod = *DAG.getMachineFunction().getFunction().getParent(); | |||
19643 | unsigned char OpFlags; | |||
19644 | if (ForCall) | |||
19645 | OpFlags = Subtarget.classifyGlobalFunctionReference(GV, Mod); | |||
19646 | else | |||
19647 | OpFlags = Subtarget.classifyGlobalReference(GV, Mod); | |||
19648 | bool HasPICReg = isGlobalRelativeToPICBase(OpFlags); | |||
19649 | bool NeedsLoad = isGlobalStubReference(OpFlags); | |||
19650 | ||||
19651 | CodeModel::Model M = DAG.getTarget().getCodeModel(); | |||
19652 | auto PtrVT = getPointerTy(DAG.getDataLayout()); | |||
19653 | SDValue Result; | |||
19654 | ||||
19655 | if (GV) { | |||
19656 | // Create a target global address if this is a global. If possible, fold the | |||
19657 | // offset into the global address reference. Otherwise, ADD it on later. | |||
19658 | // Suppress the folding if Offset is negative: movl foo-1, %eax is not | |||
19659 | // allowed because if the address of foo is 0, the ELF R_X86_64_32 | |||
19660 | // relocation will compute to a negative value, which is invalid. | |||
19661 | int64_t GlobalOffset = 0; | |||
19662 | if (OpFlags == X86II::MO_NO_FLAG && Offset >= 0 && | |||
19663 | X86::isOffsetSuitableForCodeModel(Offset, M, true)) { | |||
19664 | std::swap(GlobalOffset, Offset); | |||
19665 | } | |||
19666 | Result = DAG.getTargetGlobalAddress(GV, dl, PtrVT, GlobalOffset, OpFlags); | |||
19667 | } else { | |||
19668 | // If this is not a global address, this must be an external symbol. | |||
19669 | Result = DAG.getTargetExternalSymbol(ExternalSym, PtrVT, OpFlags); | |||
19670 | } | |||
19671 | ||||
19672 | // If this is a direct call, avoid the wrapper if we don't need to do any | |||
19673 | // loads or adds. This allows SDAG ISel to match direct calls. | |||
19674 | if (ForCall && !NeedsLoad && !HasPICReg && Offset == 0) | |||
19675 | return Result; | |||
19676 | ||||
19677 | Result = DAG.getNode(getGlobalWrapperKind(GV, OpFlags), dl, PtrVT, Result); | |||
19678 | ||||
19679 | // With PIC, the address is actually $g + Offset. | |||
19680 | if (HasPICReg) { | |||
19681 | Result = DAG.getNode(ISD::ADD, dl, PtrVT, | |||
19682 | DAG.getNode(X86ISD::GlobalBaseReg, dl, PtrVT), Result); | |||
19683 | } | |||
19684 | ||||
19685 | // For globals that require a load from a stub to get the address, emit the | |||
19686 | // load. | |||
19687 | if (NeedsLoad) | |||
19688 | Result = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), Result, | |||
19689 | MachinePointerInfo::getGOT(DAG.getMachineFunction())); | |||
19690 | ||||
19691 | // If there was a non-zero offset that we didn't fold, create an explicit | |||
19692 | // addition for it. | |||
19693 | if (Offset != 0) | |||
19694 | Result = DAG.getNode(ISD::ADD, dl, PtrVT, Result, | |||
19695 | DAG.getConstant(Offset, dl, PtrVT)); | |||
19696 | ||||
19697 | return Result; | |||
19698 | } | |||
19699 | ||||
19700 | SDValue | |||
19701 | X86TargetLowering::LowerGlobalAddress(SDValue Op, SelectionDAG &DAG) const { | |||
19702 | return LowerGlobalOrExternal(Op, DAG, /*ForCall=*/false); | |||
19703 | } | |||
19704 | ||||
19705 | static SDValue | |||
19706 | GetTLSADDR(SelectionDAG &DAG, SDValue Chain, GlobalAddressSDNode *GA, | |||
19707 | SDValue *InFlag, const EVT PtrVT, unsigned ReturnReg, | |||
19708 | unsigned char OperandFlags, bool LocalDynamic = false) { | |||
19709 | MachineFrameInfo &MFI = DAG.getMachineFunction().getFrameInfo(); | |||
19710 | SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue); | |||
19711 | SDLoc dl(GA); | |||
19712 | SDValue TGA = DAG.getTargetGlobalAddress(GA->getGlobal(), dl, | |||
19713 | GA->getValueType(0), | |||
19714 | GA->getOffset(), | |||
19715 | OperandFlags); | |||
19716 | ||||
19717 | X86ISD::NodeType CallType = LocalDynamic ? X86ISD::TLSBASEADDR | |||
19718 | : X86ISD::TLSADDR; | |||
19719 | ||||
19720 | if (InFlag) { | |||
19721 | SDValue Ops[] = { Chain, TGA, *InFlag }; | |||
19722 | Chain = DAG.getNode(CallType, dl, NodeTys, Ops); | |||
19723 | } else { | |||
19724 | SDValue Ops[] = { Chain, TGA }; | |||
19725 | Chain = DAG.getNode(CallType, dl, NodeTys, Ops); | |||
19726 | } | |||
19727 | ||||
19728 | // TLSADDR will be codegen'ed as call. Inform MFI that function has calls. | |||
19729 | MFI.setAdjustsStack(true); | |||
19730 | MFI.setHasCalls(true); | |||
19731 | ||||
19732 | SDValue Flag = Chain.getValue(1); | |||
19733 | return DAG.getCopyFromReg(Chain, dl, ReturnReg, PtrVT, Flag); | |||
19734 | } | |||
19735 | ||||
19736 | // Lower ISD::GlobalTLSAddress using the "general dynamic" model, 32 bit | |||
19737 | static SDValue | |||
19738 | LowerToTLSGeneralDynamicModel32(GlobalAddressSDNode *GA, SelectionDAG &DAG, | |||
19739 | const EVT PtrVT) { | |||
19740 | SDValue InFlag; | |||
19741 | SDLoc dl(GA); // ? function entry point might be better | |||
19742 | SDValue Chain = DAG.getCopyToReg(DAG.getEntryNode(), dl, X86::EBX, | |||
19743 | DAG.getNode(X86ISD::GlobalBaseReg, | |||
19744 | SDLoc(), PtrVT), InFlag); | |||
19745 | InFlag = Chain.getValue(1); | |||
19746 | ||||
19747 | return GetTLSADDR(DAG, Chain, GA, &InFlag, PtrVT, X86::EAX, X86II::MO_TLSGD); | |||
19748 | } | |||
19749 | ||||
19750 | // Lower ISD::GlobalTLSAddress using the "general dynamic" model, 64 bit LP64 | |||
19751 | static SDValue | |||
19752 | LowerToTLSGeneralDynamicModel64(GlobalAddressSDNode *GA, SelectionDAG &DAG, | |||
19753 | const EVT PtrVT) { | |||
19754 | return GetTLSADDR(DAG, DAG.getEntryNode(), GA, nullptr, PtrVT, | |||
19755 | X86::RAX, X86II::MO_TLSGD); | |||
19756 | } | |||
19757 | ||||
19758 | // Lower ISD::GlobalTLSAddress using the "general dynamic" model, 64 bit ILP32 | |||
19759 | static SDValue | |||
19760 | LowerToTLSGeneralDynamicModelX32(GlobalAddressSDNode *GA, SelectionDAG &DAG, | |||
19761 | const EVT PtrVT) { | |||
19762 | return GetTLSADDR(DAG, DAG.getEntryNode(), GA, nullptr, PtrVT, | |||
19763 | X86::EAX, X86II::MO_TLSGD); | |||
19764 | } | |||
19765 | ||||
19766 | static SDValue LowerToTLSLocalDynamicModel(GlobalAddressSDNode *GA, | |||
19767 | SelectionDAG &DAG, const EVT PtrVT, | |||
19768 | bool Is64Bit, bool Is64BitLP64) { | |||
19769 | SDLoc dl(GA); | |||
19770 | ||||
19771 | // Get the start address of the TLS block for this module. | |||
19772 | X86MachineFunctionInfo *MFI = DAG.getMachineFunction() | |||
19773 | .getInfo<X86MachineFunctionInfo>(); | |||
19774 | MFI->incNumLocalDynamicTLSAccesses(); | |||
19775 | ||||
19776 | SDValue Base; | |||
19777 | if (Is64Bit) { | |||
19778 | unsigned ReturnReg = Is64BitLP64 ? X86::RAX : X86::EAX; | |||
19779 | Base = GetTLSADDR(DAG, DAG.getEntryNode(), GA, nullptr, PtrVT, ReturnReg, | |||
19780 | X86II::MO_TLSLD, /*LocalDynamic=*/true); | |||
19781 | } else { | |||
19782 | SDValue InFlag; | |||
19783 | SDValue Chain = DAG.getCopyToReg(DAG.getEntryNode(), dl, X86::EBX, | |||
19784 | DAG.getNode(X86ISD::GlobalBaseReg, SDLoc(), PtrVT), InFlag); | |||
19785 | InFlag = Chain.getValue(1); | |||
19786 | Base = GetTLSADDR(DAG, Chain, GA, &InFlag, PtrVT, X86::EAX, | |||
19787 | X86II::MO_TLSLDM, /*LocalDynamic=*/true); | |||
19788 | } | |||
19789 | ||||
19790 | // Note: the CleanupLocalDynamicTLSPass will remove redundant computations | |||
19791 | // of Base. | |||
19792 | ||||
19793 | // Build x@dtpoff. | |||
19794 | unsigned char OperandFlags = X86II::MO_DTPOFF; | |||
19795 | unsigned WrapperKind = X86ISD::Wrapper; | |||
19796 | SDValue TGA = DAG.getTargetGlobalAddress(GA->getGlobal(), dl, | |||
19797 | GA->getValueType(0), | |||
19798 | GA->getOffset(), OperandFlags); | |||
19799 | SDValue Offset = DAG.getNode(WrapperKind, dl, PtrVT, TGA); | |||
19800 | ||||
19801 | // Add x@dtpoff with the base. | |||
19802 | return DAG.getNode(ISD::ADD, dl, PtrVT, Offset, Base); | |||
19803 | } | |||
19804 | ||||
19805 | // Lower ISD::GlobalTLSAddress using the "initial exec" or "local exec" model. | |||
19806 | static SDValue LowerToTLSExecModel(GlobalAddressSDNode *GA, SelectionDAG &DAG, | |||
19807 | const EVT PtrVT, TLSModel::Model model, | |||
19808 | bool is64Bit, bool isPIC) { | |||
19809 | SDLoc dl(GA); | |||
19810 | ||||
19811 | // Get the Thread Pointer, which is %gs:0 (32-bit) or %fs:0 (64-bit). | |||
19812 | Value *Ptr = Constant::getNullValue(Type::getInt8PtrTy(*DAG.getContext(), | |||
19813 | is64Bit ? 257 : 256)); | |||
19814 | ||||
19815 | SDValue ThreadPointer = | |||
19816 | DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), DAG.getIntPtrConstant(0, dl), | |||
19817 | MachinePointerInfo(Ptr)); | |||
19818 | ||||
19819 | unsigned char OperandFlags = 0; | |||
19820 | // Most TLS accesses are not RIP relative, even on x86-64. One exception is | |||
19821 | // initialexec. | |||
19822 | unsigned WrapperKind = X86ISD::Wrapper; | |||
19823 | if (model == TLSModel::LocalExec) { | |||
19824 | OperandFlags = is64Bit ? X86II::MO_TPOFF : X86II::MO_NTPOFF; | |||
19825 | } else if (model == TLSModel::InitialExec) { | |||
19826 | if (is64Bit) { | |||
19827 | OperandFlags = X86II::MO_GOTTPOFF; | |||
19828 | WrapperKind = X86ISD::WrapperRIP; | |||
19829 | } else { | |||
19830 | OperandFlags = isPIC ? X86II::MO_GOTNTPOFF : X86II::MO_INDNTPOFF; | |||
19831 | } | |||
19832 | } else { | |||
19833 | llvm_unreachable("Unexpected model")::llvm::llvm_unreachable_internal("Unexpected model", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 19833); | |||
19834 | } | |||
19835 | ||||
19836 | // emit "addl x@ntpoff,%eax" (local exec) | |||
19837 | // or "addl x@indntpoff,%eax" (initial exec) | |||
19838 | // or "addl x@gotntpoff(%ebx) ,%eax" (initial exec, 32-bit pic) | |||
19839 | SDValue TGA = | |||
19840 | DAG.getTargetGlobalAddress(GA->getGlobal(), dl, GA->getValueType(0), | |||
19841 | GA->getOffset(), OperandFlags); | |||
19842 | SDValue Offset = DAG.getNode(WrapperKind, dl, PtrVT, TGA); | |||
19843 | ||||
19844 | if (model == TLSModel::InitialExec) { | |||
19845 | if (isPIC && !is64Bit) { | |||
19846 | Offset = DAG.getNode(ISD::ADD, dl, PtrVT, | |||
19847 | DAG.getNode(X86ISD::GlobalBaseReg, SDLoc(), PtrVT), | |||
19848 | Offset); | |||
19849 | } | |||
19850 | ||||
19851 | Offset = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), Offset, | |||
19852 | MachinePointerInfo::getGOT(DAG.getMachineFunction())); | |||
19853 | } | |||
19854 | ||||
19855 | // The address of the thread local variable is the add of the thread | |||
19856 | // pointer with the offset of the variable. | |||
19857 | return DAG.getNode(ISD::ADD, dl, PtrVT, ThreadPointer, Offset); | |||
19858 | } | |||
19859 | ||||
19860 | SDValue | |||
19861 | X86TargetLowering::LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const { | |||
19862 | ||||
19863 | GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op); | |||
19864 | ||||
19865 | if (DAG.getTarget().useEmulatedTLS()) | |||
19866 | return LowerToTLSEmulatedModel(GA, DAG); | |||
19867 | ||||
19868 | const GlobalValue *GV = GA->getGlobal(); | |||
19869 | auto PtrVT = getPointerTy(DAG.getDataLayout()); | |||
19870 | bool PositionIndependent = isPositionIndependent(); | |||
19871 | ||||
19872 | if (Subtarget.isTargetELF()) { | |||
19873 | TLSModel::Model model = DAG.getTarget().getTLSModel(GV); | |||
19874 | switch (model) { | |||
19875 | case TLSModel::GeneralDynamic: | |||
19876 | if (Subtarget.is64Bit()) { | |||
19877 | if (Subtarget.isTarget64BitLP64()) | |||
19878 | return LowerToTLSGeneralDynamicModel64(GA, DAG, PtrVT); | |||
19879 | return LowerToTLSGeneralDynamicModelX32(GA, DAG, PtrVT); | |||
19880 | } | |||
19881 | return LowerToTLSGeneralDynamicModel32(GA, DAG, PtrVT); | |||
19882 | case TLSModel::LocalDynamic: | |||
19883 | return LowerToTLSLocalDynamicModel(GA, DAG, PtrVT, Subtarget.is64Bit(), | |||
19884 | Subtarget.isTarget64BitLP64()); | |||
19885 | case TLSModel::InitialExec: | |||
19886 | case TLSModel::LocalExec: | |||
19887 | return LowerToTLSExecModel(GA, DAG, PtrVT, model, Subtarget.is64Bit(), | |||
19888 | PositionIndependent); | |||
19889 | } | |||
19890 | llvm_unreachable("Unknown TLS model.")::llvm::llvm_unreachable_internal("Unknown TLS model.", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 19890); | |||
19891 | } | |||
19892 | ||||
19893 | if (Subtarget.isTargetDarwin()) { | |||
19894 | // Darwin only has one model of TLS. Lower to that. | |||
19895 | unsigned char OpFlag = 0; | |||
19896 | unsigned WrapperKind = Subtarget.isPICStyleRIPRel() ? | |||
19897 | X86ISD::WrapperRIP : X86ISD::Wrapper; | |||
19898 | ||||
19899 | // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the | |||
19900 | // global base reg. | |||
19901 | bool PIC32 = PositionIndependent && !Subtarget.is64Bit(); | |||
19902 | if (PIC32) | |||
19903 | OpFlag = X86II::MO_TLVP_PIC_BASE; | |||
19904 | else | |||
19905 | OpFlag = X86II::MO_TLVP; | |||
19906 | SDLoc DL(Op); | |||
19907 | SDValue Result = DAG.getTargetGlobalAddress(GA->getGlobal(), DL, | |||
19908 | GA->getValueType(0), | |||
19909 | GA->getOffset(), OpFlag); | |||
19910 | SDValue Offset = DAG.getNode(WrapperKind, DL, PtrVT, Result); | |||
19911 | ||||
19912 | // With PIC32, the address is actually $g + Offset. | |||
19913 | if (PIC32) | |||
19914 | Offset = DAG.getNode(ISD::ADD, DL, PtrVT, | |||
19915 | DAG.getNode(X86ISD::GlobalBaseReg, SDLoc(), PtrVT), | |||
19916 | Offset); | |||
19917 | ||||
19918 | // Lowering the machine isd will make sure everything is in the right | |||
19919 | // location. | |||
19920 | SDValue Chain = DAG.getEntryNode(); | |||
19921 | SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue); | |||
19922 | Chain = DAG.getCALLSEQ_START(Chain, 0, 0, DL); | |||
19923 | SDValue Args[] = { Chain, Offset }; | |||
19924 | Chain = DAG.getNode(X86ISD::TLSCALL, DL, NodeTys, Args); | |||
19925 | Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(0, DL, true), | |||
19926 | DAG.getIntPtrConstant(0, DL, true), | |||
19927 | Chain.getValue(1), DL); | |||
19928 | ||||
19929 | // TLSCALL will be codegen'ed as call. Inform MFI that function has calls. | |||
19930 | MachineFrameInfo &MFI = DAG.getMachineFunction().getFrameInfo(); | |||
19931 | MFI.setAdjustsStack(true); | |||
19932 | ||||
19933 | // And our return value (tls address) is in the standard call return value | |||
19934 | // location. | |||
19935 | unsigned Reg = Subtarget.is64Bit() ? X86::RAX : X86::EAX; | |||
19936 | return DAG.getCopyFromReg(Chain, DL, Reg, PtrVT, Chain.getValue(1)); | |||
19937 | } | |||
19938 | ||||
19939 | if (Subtarget.isOSWindows()) { | |||
19940 | // Just use the implicit TLS architecture | |||
19941 | // Need to generate something similar to: | |||
19942 | // mov rdx, qword [gs:abs 58H]; Load pointer to ThreadLocalStorage | |||
19943 | // ; from TEB | |||
19944 | // mov ecx, dword [rel _tls_index]: Load index (from C runtime) | |||
19945 | // mov rcx, qword [rdx+rcx*8] | |||
19946 | // mov eax, .tls$:tlsvar | |||
19947 | // [rax+rcx] contains the address | |||
19948 | // Windows 64bit: gs:0x58 | |||
19949 | // Windows 32bit: fs:__tls_array | |||
19950 | ||||
19951 | SDLoc dl(GA); | |||
19952 | SDValue Chain = DAG.getEntryNode(); | |||
19953 | ||||
19954 | // Get the Thread Pointer, which is %fs:__tls_array (32-bit) or | |||
19955 | // %gs:0x58 (64-bit). On MinGW, __tls_array is not available, so directly | |||
19956 | // use its literal value of 0x2C. | |||
19957 | Value *Ptr = Constant::getNullValue(Subtarget.is64Bit() | |||
19958 | ? Type::getInt8PtrTy(*DAG.getContext(), | |||
19959 | 256) | |||
19960 | : Type::getInt32PtrTy(*DAG.getContext(), | |||
19961 | 257)); | |||
19962 | ||||
19963 | SDValue TlsArray = Subtarget.is64Bit() | |||
19964 | ? DAG.getIntPtrConstant(0x58, dl) | |||
19965 | : (Subtarget.isTargetWindowsGNU() | |||
19966 | ? DAG.getIntPtrConstant(0x2C, dl) | |||
19967 | : DAG.getExternalSymbol("_tls_array", PtrVT)); | |||
19968 | ||||
19969 | SDValue ThreadPointer = | |||
19970 | DAG.getLoad(PtrVT, dl, Chain, TlsArray, MachinePointerInfo(Ptr)); | |||
19971 | ||||
19972 | SDValue res; | |||
19973 | if (GV->getThreadLocalMode() == GlobalVariable::LocalExecTLSModel) { | |||
19974 | res = ThreadPointer; | |||
19975 | } else { | |||
19976 | // Load the _tls_index variable | |||
19977 | SDValue IDX = DAG.getExternalSymbol("_tls_index", PtrVT); | |||
19978 | if (Subtarget.is64Bit()) | |||
19979 | IDX = DAG.getExtLoad(ISD::ZEXTLOAD, dl, PtrVT, Chain, IDX, | |||
19980 | MachinePointerInfo(), MVT::i32); | |||
19981 | else | |||
19982 | IDX = DAG.getLoad(PtrVT, dl, Chain, IDX, MachinePointerInfo()); | |||
19983 | ||||
19984 | const DataLayout &DL = DAG.getDataLayout(); | |||
19985 | SDValue Scale = | |||
19986 | DAG.getConstant(Log2_64_Ceil(DL.getPointerSize()), dl, MVT::i8); | |||
19987 | IDX = DAG.getNode(ISD::SHL, dl, PtrVT, IDX, Scale); | |||
19988 | ||||
19989 | res = DAG.getNode(ISD::ADD, dl, PtrVT, ThreadPointer, IDX); | |||
19990 | } | |||
19991 | ||||
19992 | res = DAG.getLoad(PtrVT, dl, Chain, res, MachinePointerInfo()); | |||
19993 | ||||
19994 | // Get the offset of start of .tls section | |||
19995 | SDValue TGA = DAG.getTargetGlobalAddress(GA->getGlobal(), dl, | |||
19996 | GA->getValueType(0), | |||
19997 | GA->getOffset(), X86II::MO_SECREL); | |||
19998 | SDValue Offset = DAG.getNode(X86ISD::Wrapper, dl, PtrVT, TGA); | |||
19999 | ||||
20000 | // The address of the thread local variable is the add of the thread | |||
20001 | // pointer with the offset of the variable. | |||
20002 | return DAG.getNode(ISD::ADD, dl, PtrVT, res, Offset); | |||
20003 | } | |||
20004 | ||||
20005 | llvm_unreachable("TLS not implemented for this target.")::llvm::llvm_unreachable_internal("TLS not implemented for this target." , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 20005); | |||
20006 | } | |||
20007 | ||||
20008 | /// Lower SRA_PARTS and friends, which return two i32 values | |||
20009 | /// and take a 2 x i32 value to shift plus a shift amount. | |||
20010 | /// TODO: Can this be moved to general expansion code? | |||
20011 | static SDValue LowerShiftParts(SDValue Op, SelectionDAG &DAG) { | |||
20012 | SDValue Lo, Hi; | |||
20013 | DAG.getTargetLoweringInfo().expandShiftParts(Op.getNode(), Lo, Hi, DAG); | |||
20014 | return DAG.getMergeValues({Lo, Hi}, SDLoc(Op)); | |||
20015 | } | |||
20016 | ||||
20017 | static SDValue LowerFunnelShift(SDValue Op, const X86Subtarget &Subtarget, | |||
20018 | SelectionDAG &DAG) { | |||
20019 | MVT VT = Op.getSimpleValueType(); | |||
20020 | assert((Op.getOpcode() == ISD::FSHL || Op.getOpcode() == ISD::FSHR) &&(static_cast <bool> ((Op.getOpcode() == ISD::FSHL || Op .getOpcode() == ISD::FSHR) && "Unexpected funnel shift opcode!" ) ? void (0) : __assert_fail ("(Op.getOpcode() == ISD::FSHL || Op.getOpcode() == ISD::FSHR) && \"Unexpected funnel shift opcode!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 20021, __extension__ __PRETTY_FUNCTION__)) | |||
20021 | "Unexpected funnel shift opcode!")(static_cast <bool> ((Op.getOpcode() == ISD::FSHL || Op .getOpcode() == ISD::FSHR) && "Unexpected funnel shift opcode!" ) ? void (0) : __assert_fail ("(Op.getOpcode() == ISD::FSHL || Op.getOpcode() == ISD::FSHR) && \"Unexpected funnel shift opcode!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 20021, __extension__ __PRETTY_FUNCTION__)); | |||
20022 | ||||
20023 | SDLoc DL(Op); | |||
20024 | SDValue Op0 = Op.getOperand(0); | |||
20025 | SDValue Op1 = Op.getOperand(1); | |||
20026 | SDValue Amt = Op.getOperand(2); | |||
20027 | ||||
20028 | bool IsFSHR = Op.getOpcode() == ISD::FSHR; | |||
20029 | ||||
20030 | if (VT.isVector()) { | |||
20031 | assert(Subtarget.hasVBMI2() && "Expected VBMI2")(static_cast <bool> (Subtarget.hasVBMI2() && "Expected VBMI2" ) ? void (0) : __assert_fail ("Subtarget.hasVBMI2() && \"Expected VBMI2\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 20031, __extension__ __PRETTY_FUNCTION__)); | |||
20032 | ||||
20033 | if (IsFSHR) | |||
20034 | std::swap(Op0, Op1); | |||
20035 | ||||
20036 | // With AVX512, but not VLX we need to widen to get a 512-bit result type. | |||
20037 | if (!Subtarget.hasVLX() && !VT.is512BitVector()) { | |||
20038 | Op0 = widenSubVector(Op0, false, Subtarget, DAG, DL, 512); | |||
20039 | Op1 = widenSubVector(Op1, false, Subtarget, DAG, DL, 512); | |||
20040 | } | |||
20041 | ||||
20042 | SDValue Funnel; | |||
20043 | APInt APIntShiftAmt; | |||
20044 | MVT ResultVT = Op0.getSimpleValueType(); | |||
20045 | if (X86::isConstantSplat(Amt, APIntShiftAmt)) { | |||
20046 | uint64_t ShiftAmt = APIntShiftAmt.urem(VT.getScalarSizeInBits()); | |||
20047 | Funnel = | |||
20048 | DAG.getNode(IsFSHR ? X86ISD::VSHRD : X86ISD::VSHLD, DL, ResultVT, Op0, | |||
20049 | Op1, DAG.getTargetConstant(ShiftAmt, DL, MVT::i8)); | |||
20050 | } else { | |||
20051 | if (!Subtarget.hasVLX() && !VT.is512BitVector()) | |||
20052 | Amt = widenSubVector(Amt, false, Subtarget, DAG, DL, 512); | |||
20053 | Funnel = DAG.getNode(IsFSHR ? X86ISD::VSHRDV : X86ISD::VSHLDV, DL, | |||
20054 | ResultVT, Op0, Op1, Amt); | |||
20055 | } | |||
20056 | if (!Subtarget.hasVLX() && !VT.is512BitVector()) | |||
20057 | Funnel = extractSubVector(Funnel, 0, DAG, DL, VT.getSizeInBits()); | |||
20058 | return Funnel; | |||
20059 | } | |||
20060 | assert((static_cast <bool> ((VT == MVT::i8 || VT == MVT::i16 || VT == MVT::i32 || VT == MVT::i64) && "Unexpected funnel shift type!" ) ? void (0) : __assert_fail ("(VT == MVT::i8 || VT == MVT::i16 || VT == MVT::i32 || VT == MVT::i64) && \"Unexpected funnel shift type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 20062, __extension__ __PRETTY_FUNCTION__)) | |||
20061 | (VT == MVT::i8 || VT == MVT::i16 || VT == MVT::i32 || VT == MVT::i64) &&(static_cast <bool> ((VT == MVT::i8 || VT == MVT::i16 || VT == MVT::i32 || VT == MVT::i64) && "Unexpected funnel shift type!" ) ? void (0) : __assert_fail ("(VT == MVT::i8 || VT == MVT::i16 || VT == MVT::i32 || VT == MVT::i64) && \"Unexpected funnel shift type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 20062, __extension__ __PRETTY_FUNCTION__)) | |||
20062 | "Unexpected funnel shift type!")(static_cast <bool> ((VT == MVT::i8 || VT == MVT::i16 || VT == MVT::i32 || VT == MVT::i64) && "Unexpected funnel shift type!" ) ? void (0) : __assert_fail ("(VT == MVT::i8 || VT == MVT::i16 || VT == MVT::i32 || VT == MVT::i64) && \"Unexpected funnel shift type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 20062, __extension__ __PRETTY_FUNCTION__)); | |||
20063 | ||||
20064 | // Expand slow SHLD/SHRD cases if we are not optimizing for size. | |||
20065 | bool OptForSize = DAG.shouldOptForSize(); | |||
20066 | bool ExpandFunnel = !OptForSize && Subtarget.isSHLDSlow(); | |||
20067 | ||||
20068 | // fshl(x,y,z) -> (((aext(x) << bw) | zext(y)) << (z & (bw-1))) >> bw. | |||
20069 | // fshr(x,y,z) -> (((aext(x) << bw) | zext(y)) >> (z & (bw-1))). | |||
20070 | if ((VT == MVT::i8 || (ExpandFunnel && VT == MVT::i16)) && | |||
20071 | !isa<ConstantSDNode>(Amt)) { | |||
20072 | unsigned EltSizeInBits = VT.getScalarSizeInBits(); | |||
20073 | SDValue Mask = DAG.getConstant(EltSizeInBits - 1, DL, Amt.getValueType()); | |||
20074 | SDValue HiShift = DAG.getConstant(EltSizeInBits, DL, Amt.getValueType()); | |||
20075 | Op0 = DAG.getAnyExtOrTrunc(Op0, DL, MVT::i32); | |||
20076 | Op1 = DAG.getZExtOrTrunc(Op1, DL, MVT::i32); | |||
20077 | Amt = DAG.getNode(ISD::AND, DL, Amt.getValueType(), Amt, Mask); | |||
20078 | SDValue Res = DAG.getNode(ISD::SHL, DL, MVT::i32, Op0, HiShift); | |||
20079 | Res = DAG.getNode(ISD::OR, DL, MVT::i32, Res, Op1); | |||
20080 | if (IsFSHR) { | |||
20081 | Res = DAG.getNode(ISD::SRL, DL, MVT::i32, Res, Amt); | |||
20082 | } else { | |||
20083 | Res = DAG.getNode(ISD::SHL, DL, MVT::i32, Res, Amt); | |||
20084 | Res = DAG.getNode(ISD::SRL, DL, MVT::i32, Res, HiShift); | |||
20085 | } | |||
20086 | return DAG.getZExtOrTrunc(Res, DL, VT); | |||
20087 | } | |||
20088 | ||||
20089 | if (VT == MVT::i8 || ExpandFunnel) | |||
20090 | return SDValue(); | |||
20091 | ||||
20092 | // i16 needs to modulo the shift amount, but i32/i64 have implicit modulo. | |||
20093 | if (VT == MVT::i16) { | |||
20094 | Amt = DAG.getNode(ISD::AND, DL, Amt.getValueType(), Amt, | |||
20095 | DAG.getConstant(15, DL, Amt.getValueType())); | |||
20096 | unsigned FSHOp = (IsFSHR ? X86ISD::FSHR : X86ISD::FSHL); | |||
20097 | return DAG.getNode(FSHOp, DL, VT, Op0, Op1, Amt); | |||
20098 | } | |||
20099 | ||||
20100 | return Op; | |||
20101 | } | |||
20102 | ||||
20103 | // Try to use a packed vector operation to handle i64 on 32-bit targets when | |||
20104 | // AVX512DQ is enabled. | |||
20105 | static SDValue LowerI64IntToFP_AVX512DQ(SDValue Op, SelectionDAG &DAG, | |||
20106 | const X86Subtarget &Subtarget) { | |||
20107 | assert((Op.getOpcode() == ISD::SINT_TO_FP ||(static_cast <bool> ((Op.getOpcode() == ISD::SINT_TO_FP || Op.getOpcode() == ISD::STRICT_SINT_TO_FP || Op.getOpcode( ) == ISD::STRICT_UINT_TO_FP || Op.getOpcode() == ISD::UINT_TO_FP ) && "Unexpected opcode!") ? void (0) : __assert_fail ("(Op.getOpcode() == ISD::SINT_TO_FP || Op.getOpcode() == ISD::STRICT_SINT_TO_FP || Op.getOpcode() == ISD::STRICT_UINT_TO_FP || Op.getOpcode() == ISD::UINT_TO_FP) && \"Unexpected opcode!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 20111, __extension__ __PRETTY_FUNCTION__)) | |||
20108 | Op.getOpcode() == ISD::STRICT_SINT_TO_FP ||(static_cast <bool> ((Op.getOpcode() == ISD::SINT_TO_FP || Op.getOpcode() == ISD::STRICT_SINT_TO_FP || Op.getOpcode( ) == ISD::STRICT_UINT_TO_FP || Op.getOpcode() == ISD::UINT_TO_FP ) && "Unexpected opcode!") ? void (0) : __assert_fail ("(Op.getOpcode() == ISD::SINT_TO_FP || Op.getOpcode() == ISD::STRICT_SINT_TO_FP || Op.getOpcode() == ISD::STRICT_UINT_TO_FP || Op.getOpcode() == ISD::UINT_TO_FP) && \"Unexpected opcode!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 20111, __extension__ __PRETTY_FUNCTION__)) | |||
20109 | Op.getOpcode() == ISD::STRICT_UINT_TO_FP ||(static_cast <bool> ((Op.getOpcode() == ISD::SINT_TO_FP || Op.getOpcode() == ISD::STRICT_SINT_TO_FP || Op.getOpcode( ) == ISD::STRICT_UINT_TO_FP || Op.getOpcode() == ISD::UINT_TO_FP ) && "Unexpected opcode!") ? void (0) : __assert_fail ("(Op.getOpcode() == ISD::SINT_TO_FP || Op.getOpcode() == ISD::STRICT_SINT_TO_FP || Op.getOpcode() == ISD::STRICT_UINT_TO_FP || Op.getOpcode() == ISD::UINT_TO_FP) && \"Unexpected opcode!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 20111, __extension__ __PRETTY_FUNCTION__)) | |||
20110 | Op.getOpcode() == ISD::UINT_TO_FP) &&(static_cast <bool> ((Op.getOpcode() == ISD::SINT_TO_FP || Op.getOpcode() == ISD::STRICT_SINT_TO_FP || Op.getOpcode( ) == ISD::STRICT_UINT_TO_FP || Op.getOpcode() == ISD::UINT_TO_FP ) && "Unexpected opcode!") ? void (0) : __assert_fail ("(Op.getOpcode() == ISD::SINT_TO_FP || Op.getOpcode() == ISD::STRICT_SINT_TO_FP || Op.getOpcode() == ISD::STRICT_UINT_TO_FP || Op.getOpcode() == ISD::UINT_TO_FP) && \"Unexpected opcode!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 20111, __extension__ __PRETTY_FUNCTION__)) | |||
20111 | "Unexpected opcode!")(static_cast <bool> ((Op.getOpcode() == ISD::SINT_TO_FP || Op.getOpcode() == ISD::STRICT_SINT_TO_FP || Op.getOpcode( ) == ISD::STRICT_UINT_TO_FP || Op.getOpcode() == ISD::UINT_TO_FP ) && "Unexpected opcode!") ? void (0) : __assert_fail ("(Op.getOpcode() == ISD::SINT_TO_FP || Op.getOpcode() == ISD::STRICT_SINT_TO_FP || Op.getOpcode() == ISD::STRICT_UINT_TO_FP || Op.getOpcode() == ISD::UINT_TO_FP) && \"Unexpected opcode!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 20111, __extension__ __PRETTY_FUNCTION__)); | |||
20112 | bool IsStrict = Op->isStrictFPOpcode(); | |||
20113 | unsigned OpNo = IsStrict ? 1 : 0; | |||
20114 | SDValue Src = Op.getOperand(OpNo); | |||
20115 | MVT SrcVT = Src.getSimpleValueType(); | |||
20116 | MVT VT = Op.getSimpleValueType(); | |||
20117 | ||||
20118 | if (!Subtarget.hasDQI() || SrcVT != MVT::i64 || Subtarget.is64Bit() || | |||
20119 | (VT != MVT::f32 && VT != MVT::f64)) | |||
20120 | return SDValue(); | |||
20121 | ||||
20122 | // Pack the i64 into a vector, do the operation and extract. | |||
20123 | ||||
20124 | // Using 256-bit to ensure result is 128-bits for f32 case. | |||
20125 | unsigned NumElts = Subtarget.hasVLX() ? 4 : 8; | |||
20126 | MVT VecInVT = MVT::getVectorVT(MVT::i64, NumElts); | |||
20127 | MVT VecVT = MVT::getVectorVT(VT, NumElts); | |||
20128 | ||||
20129 | SDLoc dl(Op); | |||
20130 | SDValue InVec = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VecInVT, Src); | |||
20131 | if (IsStrict) { | |||
20132 | SDValue CvtVec = DAG.getNode(Op.getOpcode(), dl, {VecVT, MVT::Other}, | |||
20133 | {Op.getOperand(0), InVec}); | |||
20134 | SDValue Chain = CvtVec.getValue(1); | |||
20135 | SDValue Value = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, VT, CvtVec, | |||
20136 | DAG.getIntPtrConstant(0, dl)); | |||
20137 | return DAG.getMergeValues({Value, Chain}, dl); | |||
20138 | } | |||
20139 | ||||
20140 | SDValue CvtVec = DAG.getNode(Op.getOpcode(), dl, VecVT, InVec); | |||
20141 | ||||
20142 | return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, VT, CvtVec, | |||
20143 | DAG.getIntPtrConstant(0, dl)); | |||
20144 | } | |||
20145 | ||||
20146 | // Try to use a packed vector operation to handle i64 on 32-bit targets. | |||
20147 | static SDValue LowerI64IntToFP16(SDValue Op, SelectionDAG &DAG, | |||
20148 | const X86Subtarget &Subtarget) { | |||
20149 | assert((Op.getOpcode() == ISD::SINT_TO_FP ||(static_cast <bool> ((Op.getOpcode() == ISD::SINT_TO_FP || Op.getOpcode() == ISD::STRICT_SINT_TO_FP || Op.getOpcode( ) == ISD::STRICT_UINT_TO_FP || Op.getOpcode() == ISD::UINT_TO_FP ) && "Unexpected opcode!") ? void (0) : __assert_fail ("(Op.getOpcode() == ISD::SINT_TO_FP || Op.getOpcode() == ISD::STRICT_SINT_TO_FP || Op.getOpcode() == ISD::STRICT_UINT_TO_FP || Op.getOpcode() == ISD::UINT_TO_FP) && \"Unexpected opcode!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 20153, __extension__ __PRETTY_FUNCTION__)) | |||
20150 | Op.getOpcode() == ISD::STRICT_SINT_TO_FP ||(static_cast <bool> ((Op.getOpcode() == ISD::SINT_TO_FP || Op.getOpcode() == ISD::STRICT_SINT_TO_FP || Op.getOpcode( ) == ISD::STRICT_UINT_TO_FP || Op.getOpcode() == ISD::UINT_TO_FP ) && "Unexpected opcode!") ? void (0) : __assert_fail ("(Op.getOpcode() == ISD::SINT_TO_FP || Op.getOpcode() == ISD::STRICT_SINT_TO_FP || Op.getOpcode() == ISD::STRICT_UINT_TO_FP || Op.getOpcode() == ISD::UINT_TO_FP) && \"Unexpected opcode!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 20153, __extension__ __PRETTY_FUNCTION__)) | |||
20151 | Op.getOpcode() == ISD::STRICT_UINT_TO_FP ||(static_cast <bool> ((Op.getOpcode() == ISD::SINT_TO_FP || Op.getOpcode() == ISD::STRICT_SINT_TO_FP || Op.getOpcode( ) == ISD::STRICT_UINT_TO_FP || Op.getOpcode() == ISD::UINT_TO_FP ) && "Unexpected opcode!") ? void (0) : __assert_fail ("(Op.getOpcode() == ISD::SINT_TO_FP || Op.getOpcode() == ISD::STRICT_SINT_TO_FP || Op.getOpcode() == ISD::STRICT_UINT_TO_FP || Op.getOpcode() == ISD::UINT_TO_FP) && \"Unexpected opcode!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 20153, __extension__ __PRETTY_FUNCTION__)) | |||
20152 | Op.getOpcode() == ISD::UINT_TO_FP) &&(static_cast <bool> ((Op.getOpcode() == ISD::SINT_TO_FP || Op.getOpcode() == ISD::STRICT_SINT_TO_FP || Op.getOpcode( ) == ISD::STRICT_UINT_TO_FP || Op.getOpcode() == ISD::UINT_TO_FP ) && "Unexpected opcode!") ? void (0) : __assert_fail ("(Op.getOpcode() == ISD::SINT_TO_FP || Op.getOpcode() == ISD::STRICT_SINT_TO_FP || Op.getOpcode() == ISD::STRICT_UINT_TO_FP || Op.getOpcode() == ISD::UINT_TO_FP) && \"Unexpected opcode!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 20153, __extension__ __PRETTY_FUNCTION__)) | |||
20153 | "Unexpected opcode!")(static_cast <bool> ((Op.getOpcode() == ISD::SINT_TO_FP || Op.getOpcode() == ISD::STRICT_SINT_TO_FP || Op.getOpcode( ) == ISD::STRICT_UINT_TO_FP || Op.getOpcode() == ISD::UINT_TO_FP ) && "Unexpected opcode!") ? void (0) : __assert_fail ("(Op.getOpcode() == ISD::SINT_TO_FP || Op.getOpcode() == ISD::STRICT_SINT_TO_FP || Op.getOpcode() == ISD::STRICT_UINT_TO_FP || Op.getOpcode() == ISD::UINT_TO_FP) && \"Unexpected opcode!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 20153, __extension__ __PRETTY_FUNCTION__)); | |||
20154 | bool IsStrict = Op->isStrictFPOpcode(); | |||
20155 | SDValue Src = Op.getOperand(IsStrict ? 1 : 0); | |||
20156 | MVT SrcVT = Src.getSimpleValueType(); | |||
20157 | MVT VT = Op.getSimpleValueType(); | |||
20158 | ||||
20159 | if (SrcVT != MVT::i64 || Subtarget.is64Bit() || VT != MVT::f16) | |||
20160 | return SDValue(); | |||
20161 | ||||
20162 | // Pack the i64 into a vector, do the operation and extract. | |||
20163 | ||||
20164 | assert(Subtarget.hasFP16() && "Expected FP16")(static_cast <bool> (Subtarget.hasFP16() && "Expected FP16" ) ? void (0) : __assert_fail ("Subtarget.hasFP16() && \"Expected FP16\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 20164, __extension__ __PRETTY_FUNCTION__)); | |||
20165 | ||||
20166 | SDLoc dl(Op); | |||
20167 | SDValue InVec = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2i64, Src); | |||
20168 | if (IsStrict) { | |||
20169 | SDValue CvtVec = DAG.getNode(Op.getOpcode(), dl, {MVT::v2f16, MVT::Other}, | |||
20170 | {Op.getOperand(0), InVec}); | |||
20171 | SDValue Chain = CvtVec.getValue(1); | |||
20172 | SDValue Value = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, VT, CvtVec, | |||
20173 | DAG.getIntPtrConstant(0, dl)); | |||
20174 | return DAG.getMergeValues({Value, Chain}, dl); | |||
20175 | } | |||
20176 | ||||
20177 | SDValue CvtVec = DAG.getNode(Op.getOpcode(), dl, MVT::v2f16, InVec); | |||
20178 | ||||
20179 | return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, VT, CvtVec, | |||
20180 | DAG.getIntPtrConstant(0, dl)); | |||
20181 | } | |||
20182 | ||||
20183 | static bool useVectorCast(unsigned Opcode, MVT FromVT, MVT ToVT, | |||
20184 | const X86Subtarget &Subtarget) { | |||
20185 | switch (Opcode) { | |||
20186 | case ISD::SINT_TO_FP: | |||
20187 | // TODO: Handle wider types with AVX/AVX512. | |||
20188 | if (!Subtarget.hasSSE2() || FromVT != MVT::v4i32) | |||
20189 | return false; | |||
20190 | // CVTDQ2PS or (V)CVTDQ2PD | |||
20191 | return ToVT == MVT::v4f32 || (Subtarget.hasAVX() && ToVT == MVT::v4f64); | |||
20192 | ||||
20193 | case ISD::UINT_TO_FP: | |||
20194 | // TODO: Handle wider types and i64 elements. | |||
20195 | if (!Subtarget.hasAVX512() || FromVT != MVT::v4i32) | |||
20196 | return false; | |||
20197 | // VCVTUDQ2PS or VCVTUDQ2PD | |||
20198 | return ToVT == MVT::v4f32 || ToVT == MVT::v4f64; | |||
20199 | ||||
20200 | default: | |||
20201 | return false; | |||
20202 | } | |||
20203 | } | |||
20204 | ||||
20205 | /// Given a scalar cast operation that is extracted from a vector, try to | |||
20206 | /// vectorize the cast op followed by extraction. This will avoid an expensive | |||
20207 | /// round-trip between XMM and GPR. | |||
20208 | static SDValue vectorizeExtractedCast(SDValue Cast, SelectionDAG &DAG, | |||
20209 | const X86Subtarget &Subtarget) { | |||
20210 | // TODO: This could be enhanced to handle smaller integer types by peeking | |||
20211 | // through an extend. | |||
20212 | SDValue Extract = Cast.getOperand(0); | |||
20213 | MVT DestVT = Cast.getSimpleValueType(); | |||
20214 | if (Extract.getOpcode() != ISD::EXTRACT_VECTOR_ELT || | |||
20215 | !isa<ConstantSDNode>(Extract.getOperand(1))) | |||
20216 | return SDValue(); | |||
20217 | ||||
20218 | // See if we have a 128-bit vector cast op for this type of cast. | |||
20219 | SDValue VecOp = Extract.getOperand(0); | |||
20220 | MVT FromVT = VecOp.getSimpleValueType(); | |||
20221 | unsigned NumEltsInXMM = 128 / FromVT.getScalarSizeInBits(); | |||
20222 | MVT Vec128VT = MVT::getVectorVT(FromVT.getScalarType(), NumEltsInXMM); | |||
20223 | MVT ToVT = MVT::getVectorVT(DestVT, NumEltsInXMM); | |||
20224 | if (!useVectorCast(Cast.getOpcode(), Vec128VT, ToVT, Subtarget)) | |||
20225 | return SDValue(); | |||
20226 | ||||
20227 | // If we are extracting from a non-zero element, first shuffle the source | |||
20228 | // vector to allow extracting from element zero. | |||
20229 | SDLoc DL(Cast); | |||
20230 | if (!isNullConstant(Extract.getOperand(1))) { | |||
20231 | SmallVector<int, 16> Mask(FromVT.getVectorNumElements(), -1); | |||
20232 | Mask[0] = Extract.getConstantOperandVal(1); | |||
20233 | VecOp = DAG.getVectorShuffle(FromVT, DL, VecOp, DAG.getUNDEF(FromVT), Mask); | |||
20234 | } | |||
20235 | // If the source vector is wider than 128-bits, extract the low part. Do not | |||
20236 | // create an unnecessarily wide vector cast op. | |||
20237 | if (FromVT != Vec128VT) | |||
20238 | VecOp = extract128BitVector(VecOp, 0, DAG, DL); | |||
20239 | ||||
20240 | // cast (extelt V, 0) --> extelt (cast (extract_subv V)), 0 | |||
20241 | // cast (extelt V, C) --> extelt (cast (extract_subv (shuffle V, [C...]))), 0 | |||
20242 | SDValue VCast = DAG.getNode(Cast.getOpcode(), DL, ToVT, VecOp); | |||
20243 | return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, DestVT, VCast, | |||
20244 | DAG.getIntPtrConstant(0, DL)); | |||
20245 | } | |||
20246 | ||||
20247 | /// Given a scalar cast to FP with a cast to integer operand (almost an ftrunc), | |||
20248 | /// try to vectorize the cast ops. This will avoid an expensive round-trip | |||
20249 | /// between XMM and GPR. | |||
20250 | static SDValue lowerFPToIntToFP(SDValue CastToFP, SelectionDAG &DAG, | |||
20251 | const X86Subtarget &Subtarget) { | |||
20252 | // TODO: Allow FP_TO_UINT. | |||
20253 | SDValue CastToInt = CastToFP.getOperand(0); | |||
20254 | MVT VT = CastToFP.getSimpleValueType(); | |||
20255 | if (CastToInt.getOpcode() != ISD::FP_TO_SINT || VT.isVector()) | |||
20256 | return SDValue(); | |||
20257 | ||||
20258 | MVT IntVT = CastToInt.getSimpleValueType(); | |||
20259 | SDValue X = CastToInt.getOperand(0); | |||
20260 | MVT SrcVT = X.getSimpleValueType(); | |||
20261 | if (SrcVT != MVT::f32 && SrcVT != MVT::f64) | |||
20262 | return SDValue(); | |||
20263 | ||||
20264 | // See if we have 128-bit vector cast instructions for this type of cast. | |||
20265 | // We need cvttps2dq/cvttpd2dq and cvtdq2ps/cvtdq2pd. | |||
20266 | if (!Subtarget.hasSSE2() || (VT != MVT::f32 && VT != MVT::f64) || | |||
20267 | IntVT != MVT::i32) | |||
20268 | return SDValue(); | |||
20269 | ||||
20270 | unsigned SrcSize = SrcVT.getSizeInBits(); | |||
20271 | unsigned IntSize = IntVT.getSizeInBits(); | |||
20272 | unsigned VTSize = VT.getSizeInBits(); | |||
20273 | MVT VecSrcVT = MVT::getVectorVT(SrcVT, 128 / SrcSize); | |||
20274 | MVT VecIntVT = MVT::getVectorVT(IntVT, 128 / IntSize); | |||
20275 | MVT VecVT = MVT::getVectorVT(VT, 128 / VTSize); | |||
20276 | ||||
20277 | // We need target-specific opcodes if this is v2f64 -> v4i32 -> v2f64. | |||
20278 | unsigned ToIntOpcode = | |||
20279 | SrcSize != IntSize ? X86ISD::CVTTP2SI : (unsigned)ISD::FP_TO_SINT; | |||
20280 | unsigned ToFPOpcode = | |||
20281 | IntSize != VTSize ? X86ISD::CVTSI2P : (unsigned)ISD::SINT_TO_FP; | |||
20282 | ||||
20283 | // sint_to_fp (fp_to_sint X) --> extelt (sint_to_fp (fp_to_sint (s2v X))), 0 | |||
20284 | // | |||
20285 | // We are not defining the high elements (for example, zero them) because | |||
20286 | // that could nullify any performance advantage that we hoped to gain from | |||
20287 | // this vector op hack. We do not expect any adverse effects (like denorm | |||
20288 | // penalties) with cast ops. | |||
20289 | SDLoc DL(CastToFP); | |||
20290 | SDValue ZeroIdx = DAG.getIntPtrConstant(0, DL); | |||
20291 | SDValue VecX = DAG.getNode(ISD::SCALAR_TO_VECTOR, DL, VecSrcVT, X); | |||
20292 | SDValue VCastToInt = DAG.getNode(ToIntOpcode, DL, VecIntVT, VecX); | |||
20293 | SDValue VCastToFP = DAG.getNode(ToFPOpcode, DL, VecVT, VCastToInt); | |||
20294 | return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, VT, VCastToFP, ZeroIdx); | |||
20295 | } | |||
20296 | ||||
20297 | static SDValue lowerINT_TO_FP_vXi64(SDValue Op, SelectionDAG &DAG, | |||
20298 | const X86Subtarget &Subtarget) { | |||
20299 | SDLoc DL(Op); | |||
20300 | bool IsStrict = Op->isStrictFPOpcode(); | |||
20301 | MVT VT = Op->getSimpleValueType(0); | |||
20302 | SDValue Src = Op->getOperand(IsStrict ? 1 : 0); | |||
20303 | ||||
20304 | if (Subtarget.hasDQI()) { | |||
20305 | assert(!Subtarget.hasVLX() && "Unexpected features")(static_cast <bool> (!Subtarget.hasVLX() && "Unexpected features" ) ? void (0) : __assert_fail ("!Subtarget.hasVLX() && \"Unexpected features\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 20305, __extension__ __PRETTY_FUNCTION__)); | |||
20306 | ||||
20307 | assert((Src.getSimpleValueType() == MVT::v2i64 ||(static_cast <bool> ((Src.getSimpleValueType() == MVT:: v2i64 || Src.getSimpleValueType() == MVT::v4i64) && "Unsupported custom type" ) ? void (0) : __assert_fail ("(Src.getSimpleValueType() == MVT::v2i64 || Src.getSimpleValueType() == MVT::v4i64) && \"Unsupported custom type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 20309, __extension__ __PRETTY_FUNCTION__)) | |||
20308 | Src.getSimpleValueType() == MVT::v4i64) &&(static_cast <bool> ((Src.getSimpleValueType() == MVT:: v2i64 || Src.getSimpleValueType() == MVT::v4i64) && "Unsupported custom type" ) ? void (0) : __assert_fail ("(Src.getSimpleValueType() == MVT::v2i64 || Src.getSimpleValueType() == MVT::v4i64) && \"Unsupported custom type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 20309, __extension__ __PRETTY_FUNCTION__)) | |||
20309 | "Unsupported custom type")(static_cast <bool> ((Src.getSimpleValueType() == MVT:: v2i64 || Src.getSimpleValueType() == MVT::v4i64) && "Unsupported custom type" ) ? void (0) : __assert_fail ("(Src.getSimpleValueType() == MVT::v2i64 || Src.getSimpleValueType() == MVT::v4i64) && \"Unsupported custom type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 20309, __extension__ __PRETTY_FUNCTION__)); | |||
20310 | ||||
20311 | // With AVX512DQ, but not VLX we need to widen to get a 512-bit result type. | |||
20312 | assert((VT == MVT::v4f32 || VT == MVT::v2f64 || VT == MVT::v4f64) &&(static_cast <bool> ((VT == MVT::v4f32 || VT == MVT::v2f64 || VT == MVT::v4f64) && "Unexpected VT!") ? void (0) : __assert_fail ("(VT == MVT::v4f32 || VT == MVT::v2f64 || VT == MVT::v4f64) && \"Unexpected VT!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 20313, __extension__ __PRETTY_FUNCTION__)) | |||
20313 | "Unexpected VT!")(static_cast <bool> ((VT == MVT::v4f32 || VT == MVT::v2f64 || VT == MVT::v4f64) && "Unexpected VT!") ? void (0) : __assert_fail ("(VT == MVT::v4f32 || VT == MVT::v2f64 || VT == MVT::v4f64) && \"Unexpected VT!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 20313, __extension__ __PRETTY_FUNCTION__)); | |||
20314 | MVT WideVT = VT == MVT::v4f32 ? MVT::v8f32 : MVT::v8f64; | |||
20315 | ||||
20316 | // Need to concat with zero vector for strict fp to avoid spurious | |||
20317 | // exceptions. | |||
20318 | SDValue Tmp = IsStrict ? DAG.getConstant(0, DL, MVT::v8i64) | |||
20319 | : DAG.getUNDEF(MVT::v8i64); | |||
20320 | Src = DAG.getNode(ISD::INSERT_SUBVECTOR, DL, MVT::v8i64, Tmp, Src, | |||
20321 | DAG.getIntPtrConstant(0, DL)); | |||
20322 | SDValue Res, Chain; | |||
20323 | if (IsStrict) { | |||
20324 | Res = DAG.getNode(Op.getOpcode(), DL, {WideVT, MVT::Other}, | |||
20325 | {Op->getOperand(0), Src}); | |||
20326 | Chain = Res.getValue(1); | |||
20327 | } else { | |||
20328 | Res = DAG.getNode(Op.getOpcode(), DL, WideVT, Src); | |||
20329 | } | |||
20330 | ||||
20331 | Res = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, VT, Res, | |||
20332 | DAG.getIntPtrConstant(0, DL)); | |||
20333 | ||||
20334 | if (IsStrict) | |||
20335 | return DAG.getMergeValues({Res, Chain}, DL); | |||
20336 | return Res; | |||
20337 | } | |||
20338 | ||||
20339 | bool IsSigned = Op->getOpcode() == ISD::SINT_TO_FP || | |||
20340 | Op->getOpcode() == ISD::STRICT_SINT_TO_FP; | |||
20341 | if (VT != MVT::v4f32 || IsSigned) | |||
20342 | return SDValue(); | |||
20343 | ||||
20344 | SDValue Zero = DAG.getConstant(0, DL, MVT::v4i64); | |||
20345 | SDValue One = DAG.getConstant(1, DL, MVT::v4i64); | |||
20346 | SDValue Sign = DAG.getNode(ISD::OR, DL, MVT::v4i64, | |||
20347 | DAG.getNode(ISD::SRL, DL, MVT::v4i64, Src, One), | |||
20348 | DAG.getNode(ISD::AND, DL, MVT::v4i64, Src, One)); | |||
20349 | SDValue IsNeg = DAG.getSetCC(DL, MVT::v4i64, Src, Zero, ISD::SETLT); | |||
20350 | SDValue SignSrc = DAG.getSelect(DL, MVT::v4i64, IsNeg, Sign, Src); | |||
20351 | SmallVector<SDValue, 4> SignCvts(4); | |||
20352 | SmallVector<SDValue, 4> Chains(4); | |||
20353 | for (int i = 0; i != 4; ++i) { | |||
20354 | SDValue Elt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, MVT::i64, SignSrc, | |||
20355 | DAG.getIntPtrConstant(i, DL)); | |||
20356 | if (IsStrict) { | |||
20357 | SignCvts[i] = | |||
20358 | DAG.getNode(ISD::STRICT_SINT_TO_FP, DL, {MVT::f32, MVT::Other}, | |||
20359 | {Op.getOperand(0), Elt}); | |||
20360 | Chains[i] = SignCvts[i].getValue(1); | |||
20361 | } else { | |||
20362 | SignCvts[i] = DAG.getNode(ISD::SINT_TO_FP, DL, MVT::f32, Elt); | |||
20363 | } | |||
20364 | } | |||
20365 | SDValue SignCvt = DAG.getBuildVector(VT, DL, SignCvts); | |||
20366 | ||||
20367 | SDValue Slow, Chain; | |||
20368 | if (IsStrict) { | |||
20369 | Chain = DAG.getNode(ISD::TokenFactor, DL, MVT::Other, Chains); | |||
20370 | Slow = DAG.getNode(ISD::STRICT_FADD, DL, {MVT::v4f32, MVT::Other}, | |||
20371 | {Chain, SignCvt, SignCvt}); | |||
20372 | Chain = Slow.getValue(1); | |||
20373 | } else { | |||
20374 | Slow = DAG.getNode(ISD::FADD, DL, MVT::v4f32, SignCvt, SignCvt); | |||
20375 | } | |||
20376 | ||||
20377 | IsNeg = DAG.getNode(ISD::TRUNCATE, DL, MVT::v4i32, IsNeg); | |||
20378 | SDValue Cvt = DAG.getSelect(DL, MVT::v4f32, IsNeg, Slow, SignCvt); | |||
20379 | ||||
20380 | if (IsStrict) | |||
20381 | return DAG.getMergeValues({Cvt, Chain}, DL); | |||
20382 | ||||
20383 | return Cvt; | |||
20384 | } | |||
20385 | ||||
20386 | SDValue X86TargetLowering::LowerSINT_TO_FP(SDValue Op, | |||
20387 | SelectionDAG &DAG) const { | |||
20388 | bool IsStrict = Op->isStrictFPOpcode(); | |||
20389 | unsigned OpNo = IsStrict ? 1 : 0; | |||
20390 | SDValue Src = Op.getOperand(OpNo); | |||
20391 | SDValue Chain = IsStrict ? Op->getOperand(0) : DAG.getEntryNode(); | |||
20392 | MVT SrcVT = Src.getSimpleValueType(); | |||
20393 | MVT VT = Op.getSimpleValueType(); | |||
20394 | SDLoc dl(Op); | |||
20395 | ||||
20396 | if (SDValue Extract = vectorizeExtractedCast(Op, DAG, Subtarget)) | |||
20397 | return Extract; | |||
20398 | ||||
20399 | if (SDValue R = lowerFPToIntToFP(Op, DAG, Subtarget)) | |||
20400 | return R; | |||
20401 | ||||
20402 | if (SrcVT.isVector()) { | |||
20403 | if (SrcVT == MVT::v2i32 && VT == MVT::v2f64) { | |||
20404 | // Note: Since v2f64 is a legal type. We don't need to zero extend the | |||
20405 | // source for strict FP. | |||
20406 | if (IsStrict) | |||
20407 | return DAG.getNode( | |||
20408 | X86ISD::STRICT_CVTSI2P, dl, {VT, MVT::Other}, | |||
20409 | {Chain, DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v4i32, Src, | |||
20410 | DAG.getUNDEF(SrcVT))}); | |||
20411 | return DAG.getNode(X86ISD::CVTSI2P, dl, VT, | |||
20412 | DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v4i32, Src, | |||
20413 | DAG.getUNDEF(SrcVT))); | |||
20414 | } | |||
20415 | if (SrcVT == MVT::v2i64 || SrcVT == MVT::v4i64) | |||
20416 | return lowerINT_TO_FP_vXi64(Op, DAG, Subtarget); | |||
20417 | ||||
20418 | return SDValue(); | |||
20419 | } | |||
20420 | ||||
20421 | assert(SrcVT <= MVT::i64 && SrcVT >= MVT::i16 &&(static_cast <bool> (SrcVT <= MVT::i64 && SrcVT >= MVT::i16 && "Unknown SINT_TO_FP to lower!") ? void (0) : __assert_fail ("SrcVT <= MVT::i64 && SrcVT >= MVT::i16 && \"Unknown SINT_TO_FP to lower!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 20422, __extension__ __PRETTY_FUNCTION__)) | |||
20422 | "Unknown SINT_TO_FP to lower!")(static_cast <bool> (SrcVT <= MVT::i64 && SrcVT >= MVT::i16 && "Unknown SINT_TO_FP to lower!") ? void (0) : __assert_fail ("SrcVT <= MVT::i64 && SrcVT >= MVT::i16 && \"Unknown SINT_TO_FP to lower!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 20422, __extension__ __PRETTY_FUNCTION__)); | |||
20423 | ||||
20424 | bool UseSSEReg = isScalarFPTypeInSSEReg(VT); | |||
20425 | ||||
20426 | // These are really Legal; return the operand so the caller accepts it as | |||
20427 | // Legal. | |||
20428 | if (SrcVT == MVT::i32 && UseSSEReg) | |||
20429 | return Op; | |||
20430 | if (SrcVT == MVT::i64 && UseSSEReg && Subtarget.is64Bit()) | |||
20431 | return Op; | |||
20432 | ||||
20433 | if (SDValue V = LowerI64IntToFP_AVX512DQ(Op, DAG, Subtarget)) | |||
20434 | return V; | |||
20435 | if (SDValue V = LowerI64IntToFP16(Op, DAG, Subtarget)) | |||
20436 | return V; | |||
20437 | ||||
20438 | // SSE doesn't have an i16 conversion so we need to promote. | |||
20439 | if (SrcVT == MVT::i16 && (UseSSEReg || VT == MVT::f128)) { | |||
20440 | SDValue Ext = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::i32, Src); | |||
20441 | if (IsStrict) | |||
20442 | return DAG.getNode(ISD::STRICT_SINT_TO_FP, dl, {VT, MVT::Other}, | |||
20443 | {Chain, Ext}); | |||
20444 | ||||
20445 | return DAG.getNode(ISD::SINT_TO_FP, dl, VT, Ext); | |||
20446 | } | |||
20447 | ||||
20448 | if (VT == MVT::f128) | |||
20449 | return SDValue(); | |||
20450 | ||||
20451 | SDValue ValueToStore = Src; | |||
20452 | if (SrcVT == MVT::i64 && Subtarget.hasSSE2() && !Subtarget.is64Bit()) | |||
20453 | // Bitcasting to f64 here allows us to do a single 64-bit store from | |||
20454 | // an SSE register, avoiding the store forwarding penalty that would come | |||
20455 | // with two 32-bit stores. | |||
20456 | ValueToStore = DAG.getBitcast(MVT::f64, ValueToStore); | |||
20457 | ||||
20458 | unsigned Size = SrcVT.getStoreSize(); | |||
20459 | Align Alignment(Size); | |||
20460 | MachineFunction &MF = DAG.getMachineFunction(); | |||
20461 | auto PtrVT = getPointerTy(MF.getDataLayout()); | |||
20462 | int SSFI = MF.getFrameInfo().CreateStackObject(Size, Alignment, false); | |||
20463 | MachinePointerInfo MPI = | |||
20464 | MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), SSFI); | |||
20465 | SDValue StackSlot = DAG.getFrameIndex(SSFI, PtrVT); | |||
20466 | Chain = DAG.getStore(Chain, dl, ValueToStore, StackSlot, MPI, Alignment); | |||
20467 | std::pair<SDValue, SDValue> Tmp = | |||
20468 | BuildFILD(VT, SrcVT, dl, Chain, StackSlot, MPI, Alignment, DAG); | |||
20469 | ||||
20470 | if (IsStrict) | |||
20471 | return DAG.getMergeValues({Tmp.first, Tmp.second}, dl); | |||
20472 | ||||
20473 | return Tmp.first; | |||
20474 | } | |||
20475 | ||||
20476 | std::pair<SDValue, SDValue> X86TargetLowering::BuildFILD( | |||
20477 | EVT DstVT, EVT SrcVT, const SDLoc &DL, SDValue Chain, SDValue Pointer, | |||
20478 | MachinePointerInfo PtrInfo, Align Alignment, SelectionDAG &DAG) const { | |||
20479 | // Build the FILD | |||
20480 | SDVTList Tys; | |||
20481 | bool useSSE = isScalarFPTypeInSSEReg(DstVT); | |||
20482 | if (useSSE) | |||
20483 | Tys = DAG.getVTList(MVT::f80, MVT::Other); | |||
20484 | else | |||
20485 | Tys = DAG.getVTList(DstVT, MVT::Other); | |||
20486 | ||||
20487 | SDValue FILDOps[] = {Chain, Pointer}; | |||
20488 | SDValue Result = | |||
20489 | DAG.getMemIntrinsicNode(X86ISD::FILD, DL, Tys, FILDOps, SrcVT, PtrInfo, | |||
20490 | Alignment, MachineMemOperand::MOLoad); | |||
20491 | Chain = Result.getValue(1); | |||
20492 | ||||
20493 | if (useSSE) { | |||
20494 | MachineFunction &MF = DAG.getMachineFunction(); | |||
20495 | unsigned SSFISize = DstVT.getStoreSize(); | |||
20496 | int SSFI = | |||
20497 | MF.getFrameInfo().CreateStackObject(SSFISize, Align(SSFISize), false); | |||
20498 | auto PtrVT = getPointerTy(MF.getDataLayout()); | |||
20499 | SDValue StackSlot = DAG.getFrameIndex(SSFI, PtrVT); | |||
20500 | Tys = DAG.getVTList(MVT::Other); | |||
20501 | SDValue FSTOps[] = {Chain, Result, StackSlot}; | |||
20502 | MachineMemOperand *StoreMMO = DAG.getMachineFunction().getMachineMemOperand( | |||
20503 | MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), SSFI), | |||
20504 | MachineMemOperand::MOStore, SSFISize, Align(SSFISize)); | |||
20505 | ||||
20506 | Chain = | |||
20507 | DAG.getMemIntrinsicNode(X86ISD::FST, DL, Tys, FSTOps, DstVT, StoreMMO); | |||
20508 | Result = DAG.getLoad( | |||
20509 | DstVT, DL, Chain, StackSlot, | |||
20510 | MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), SSFI)); | |||
20511 | Chain = Result.getValue(1); | |||
20512 | } | |||
20513 | ||||
20514 | return { Result, Chain }; | |||
20515 | } | |||
20516 | ||||
20517 | /// Horizontal vector math instructions may be slower than normal math with | |||
20518 | /// shuffles. Limit horizontal op codegen based on size/speed trade-offs, uarch | |||
20519 | /// implementation, and likely shuffle complexity of the alternate sequence. | |||
20520 | static bool shouldUseHorizontalOp(bool IsSingleSource, SelectionDAG &DAG, | |||
20521 | const X86Subtarget &Subtarget) { | |||
20522 | bool IsOptimizingSize = DAG.shouldOptForSize(); | |||
20523 | bool HasFastHOps = Subtarget.hasFastHorizontalOps(); | |||
20524 | return !IsSingleSource || IsOptimizingSize || HasFastHOps; | |||
20525 | } | |||
20526 | ||||
20527 | /// 64-bit unsigned integer to double expansion. | |||
20528 | static SDValue LowerUINT_TO_FP_i64(SDValue Op, SelectionDAG &DAG, | |||
20529 | const X86Subtarget &Subtarget) { | |||
20530 | // We can't use this algorithm for strict fp. It produces -0.0 instead of +0.0 | |||
20531 | // when converting 0 when rounding toward negative infinity. Caller will | |||
20532 | // fall back to Expand for when i64 or is legal or use FILD in 32-bit mode. | |||
20533 | assert(!Op->isStrictFPOpcode() && "Expected non-strict uint_to_fp!")(static_cast <bool> (!Op->isStrictFPOpcode() && "Expected non-strict uint_to_fp!") ? void (0) : __assert_fail ("!Op->isStrictFPOpcode() && \"Expected non-strict uint_to_fp!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 20533, __extension__ __PRETTY_FUNCTION__)); | |||
20534 | // This algorithm is not obvious. Here it is what we're trying to output: | |||
20535 | /* | |||
20536 | movq %rax, %xmm0 | |||
20537 | punpckldq (c0), %xmm0 // c0: (uint4){ 0x43300000U, 0x45300000U, 0U, 0U } | |||
20538 | subpd (c1), %xmm0 // c1: (double2){ 0x1.0p52, 0x1.0p52 * 0x1.0p32 } | |||
20539 | #ifdef __SSE3__ | |||
20540 | haddpd %xmm0, %xmm0 | |||
20541 | #else | |||
20542 | pshufd $0x4e, %xmm0, %xmm1 | |||
20543 | addpd %xmm1, %xmm0 | |||
20544 | #endif | |||
20545 | */ | |||
20546 | ||||
20547 | SDLoc dl(Op); | |||
20548 | LLVMContext *Context = DAG.getContext(); | |||
20549 | ||||
20550 | // Build some magic constants. | |||
20551 | static const uint32_t CV0[] = { 0x43300000, 0x45300000, 0, 0 }; | |||
20552 | Constant *C0 = ConstantDataVector::get(*Context, CV0); | |||
20553 | auto PtrVT = DAG.getTargetLoweringInfo().getPointerTy(DAG.getDataLayout()); | |||
20554 | SDValue CPIdx0 = DAG.getConstantPool(C0, PtrVT, Align(16)); | |||
20555 | ||||
20556 | SmallVector<Constant*,2> CV1; | |||
20557 | CV1.push_back( | |||
20558 | ConstantFP::get(*Context, APFloat(APFloat::IEEEdouble(), | |||
20559 | APInt(64, 0x4330000000000000ULL)))); | |||
20560 | CV1.push_back( | |||
20561 | ConstantFP::get(*Context, APFloat(APFloat::IEEEdouble(), | |||
20562 | APInt(64, 0x4530000000000000ULL)))); | |||
20563 | Constant *C1 = ConstantVector::get(CV1); | |||
20564 | SDValue CPIdx1 = DAG.getConstantPool(C1, PtrVT, Align(16)); | |||
20565 | ||||
20566 | // Load the 64-bit value into an XMM register. | |||
20567 | SDValue XR1 = | |||
20568 | DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2i64, Op.getOperand(0)); | |||
20569 | SDValue CLod0 = DAG.getLoad( | |||
20570 | MVT::v4i32, dl, DAG.getEntryNode(), CPIdx0, | |||
20571 | MachinePointerInfo::getConstantPool(DAG.getMachineFunction()), Align(16)); | |||
20572 | SDValue Unpck1 = | |||
20573 | getUnpackl(DAG, dl, MVT::v4i32, DAG.getBitcast(MVT::v4i32, XR1), CLod0); | |||
20574 | ||||
20575 | SDValue CLod1 = DAG.getLoad( | |||
20576 | MVT::v2f64, dl, CLod0.getValue(1), CPIdx1, | |||
20577 | MachinePointerInfo::getConstantPool(DAG.getMachineFunction()), Align(16)); | |||
20578 | SDValue XR2F = DAG.getBitcast(MVT::v2f64, Unpck1); | |||
20579 | // TODO: Are there any fast-math-flags to propagate here? | |||
20580 | SDValue Sub = DAG.getNode(ISD::FSUB, dl, MVT::v2f64, XR2F, CLod1); | |||
20581 | SDValue Result; | |||
20582 | ||||
20583 | if (Subtarget.hasSSE3() && | |||
20584 | shouldUseHorizontalOp(true, DAG, Subtarget)) { | |||
20585 | Result = DAG.getNode(X86ISD::FHADD, dl, MVT::v2f64, Sub, Sub); | |||
20586 | } else { | |||
20587 | SDValue Shuffle = DAG.getVectorShuffle(MVT::v2f64, dl, Sub, Sub, {1,-1}); | |||
20588 | Result = DAG.getNode(ISD::FADD, dl, MVT::v2f64, Shuffle, Sub); | |||
20589 | } | |||
20590 | Result = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Result, | |||
20591 | DAG.getIntPtrConstant(0, dl)); | |||
20592 | return Result; | |||
20593 | } | |||
20594 | ||||
20595 | /// 32-bit unsigned integer to float expansion. | |||
20596 | static SDValue LowerUINT_TO_FP_i32(SDValue Op, SelectionDAG &DAG, | |||
20597 | const X86Subtarget &Subtarget) { | |||
20598 | unsigned OpNo = Op.getNode()->isStrictFPOpcode() ? 1 : 0; | |||
20599 | SDLoc dl(Op); | |||
20600 | // FP constant to bias correct the final result. | |||
20601 | SDValue Bias = DAG.getConstantFP(BitsToDouble(0x4330000000000000ULL), dl, | |||
20602 | MVT::f64); | |||
20603 | ||||
20604 | // Load the 32-bit value into an XMM register. | |||
20605 | SDValue Load = | |||
20606 | DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32, Op.getOperand(OpNo)); | |||
20607 | ||||
20608 | // Zero out the upper parts of the register. | |||
20609 | Load = getShuffleVectorZeroOrUndef(Load, 0, true, Subtarget, DAG); | |||
20610 | ||||
20611 | // Or the load with the bias. | |||
20612 | SDValue Or = DAG.getNode( | |||
20613 | ISD::OR, dl, MVT::v2i64, | |||
20614 | DAG.getBitcast(MVT::v2i64, Load), | |||
20615 | DAG.getBitcast(MVT::v2i64, | |||
20616 | DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2f64, Bias))); | |||
20617 | Or = | |||
20618 | DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, | |||
20619 | DAG.getBitcast(MVT::v2f64, Or), DAG.getIntPtrConstant(0, dl)); | |||
20620 | ||||
20621 | if (Op.getNode()->isStrictFPOpcode()) { | |||
20622 | // Subtract the bias. | |||
20623 | // TODO: Are there any fast-math-flags to propagate here? | |||
20624 | SDValue Chain = Op.getOperand(0); | |||
20625 | SDValue Sub = DAG.getNode(ISD::STRICT_FSUB, dl, {MVT::f64, MVT::Other}, | |||
20626 | {Chain, Or, Bias}); | |||
20627 | ||||
20628 | if (Op.getValueType() == Sub.getValueType()) | |||
20629 | return Sub; | |||
20630 | ||||
20631 | // Handle final rounding. | |||
20632 | std::pair<SDValue, SDValue> ResultPair = DAG.getStrictFPExtendOrRound( | |||
20633 | Sub, Sub.getValue(1), dl, Op.getSimpleValueType()); | |||
20634 | ||||
20635 | return DAG.getMergeValues({ResultPair.first, ResultPair.second}, dl); | |||
20636 | } | |||
20637 | ||||
20638 | // Subtract the bias. | |||
20639 | // TODO: Are there any fast-math-flags to propagate here? | |||
20640 | SDValue Sub = DAG.getNode(ISD::FSUB, dl, MVT::f64, Or, Bias); | |||
20641 | ||||
20642 | // Handle final rounding. | |||
20643 | return DAG.getFPExtendOrRound(Sub, dl, Op.getSimpleValueType()); | |||
20644 | } | |||
20645 | ||||
20646 | static SDValue lowerUINT_TO_FP_v2i32(SDValue Op, SelectionDAG &DAG, | |||
20647 | const X86Subtarget &Subtarget, | |||
20648 | const SDLoc &DL) { | |||
20649 | if (Op.getSimpleValueType() != MVT::v2f64) | |||
20650 | return SDValue(); | |||
20651 | ||||
20652 | bool IsStrict = Op->isStrictFPOpcode(); | |||
20653 | ||||
20654 | SDValue N0 = Op.getOperand(IsStrict ? 1 : 0); | |||
20655 | assert(N0.getSimpleValueType() == MVT::v2i32 && "Unexpected input type")(static_cast <bool> (N0.getSimpleValueType() == MVT::v2i32 && "Unexpected input type") ? void (0) : __assert_fail ("N0.getSimpleValueType() == MVT::v2i32 && \"Unexpected input type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 20655, __extension__ __PRETTY_FUNCTION__)); | |||
20656 | ||||
20657 | if (Subtarget.hasAVX512()) { | |||
20658 | if (!Subtarget.hasVLX()) { | |||
20659 | // Let generic type legalization widen this. | |||
20660 | if (!IsStrict) | |||
20661 | return SDValue(); | |||
20662 | // Otherwise pad the integer input with 0s and widen the operation. | |||
20663 | N0 = DAG.getNode(ISD::CONCAT_VECTORS, DL, MVT::v4i32, N0, | |||
20664 | DAG.getConstant(0, DL, MVT::v2i32)); | |||
20665 | SDValue Res = DAG.getNode(Op->getOpcode(), DL, {MVT::v4f64, MVT::Other}, | |||
20666 | {Op.getOperand(0), N0}); | |||
20667 | SDValue Chain = Res.getValue(1); | |||
20668 | Res = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, MVT::v2f64, Res, | |||
20669 | DAG.getIntPtrConstant(0, DL)); | |||
20670 | return DAG.getMergeValues({Res, Chain}, DL); | |||
20671 | } | |||
20672 | ||||
20673 | // Legalize to v4i32 type. | |||
20674 | N0 = DAG.getNode(ISD::CONCAT_VECTORS, DL, MVT::v4i32, N0, | |||
20675 | DAG.getUNDEF(MVT::v2i32)); | |||
20676 | if (IsStrict) | |||
20677 | return DAG.getNode(X86ISD::STRICT_CVTUI2P, DL, {MVT::v2f64, MVT::Other}, | |||
20678 | {Op.getOperand(0), N0}); | |||
20679 | return DAG.getNode(X86ISD::CVTUI2P, DL, MVT::v2f64, N0); | |||
20680 | } | |||
20681 | ||||
20682 | // Zero extend to 2i64, OR with the floating point representation of 2^52. | |||
20683 | // This gives us the floating point equivalent of 2^52 + the i32 integer | |||
20684 | // since double has 52-bits of mantissa. Then subtract 2^52 in floating | |||
20685 | // point leaving just our i32 integers in double format. | |||
20686 | SDValue ZExtIn = DAG.getNode(ISD::ZERO_EXTEND, DL, MVT::v2i64, N0); | |||
20687 | SDValue VBias = | |||
20688 | DAG.getConstantFP(BitsToDouble(0x4330000000000000ULL), DL, MVT::v2f64); | |||
20689 | SDValue Or = DAG.getNode(ISD::OR, DL, MVT::v2i64, ZExtIn, | |||
20690 | DAG.getBitcast(MVT::v2i64, VBias)); | |||
20691 | Or = DAG.getBitcast(MVT::v2f64, Or); | |||
20692 | ||||
20693 | if (IsStrict) | |||
20694 | return DAG.getNode(ISD::STRICT_FSUB, DL, {MVT::v2f64, MVT::Other}, | |||
20695 | {Op.getOperand(0), Or, VBias}); | |||
20696 | return DAG.getNode(ISD::FSUB, DL, MVT::v2f64, Or, VBias); | |||
20697 | } | |||
20698 | ||||
20699 | static SDValue lowerUINT_TO_FP_vXi32(SDValue Op, SelectionDAG &DAG, | |||
20700 | const X86Subtarget &Subtarget) { | |||
20701 | SDLoc DL(Op); | |||
20702 | bool IsStrict = Op->isStrictFPOpcode(); | |||
20703 | SDValue V = Op->getOperand(IsStrict ? 1 : 0); | |||
20704 | MVT VecIntVT = V.getSimpleValueType(); | |||
20705 | assert((VecIntVT == MVT::v4i32 || VecIntVT == MVT::v8i32) &&(static_cast <bool> ((VecIntVT == MVT::v4i32 || VecIntVT == MVT::v8i32) && "Unsupported custom type") ? void ( 0) : __assert_fail ("(VecIntVT == MVT::v4i32 || VecIntVT == MVT::v8i32) && \"Unsupported custom type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 20706, __extension__ __PRETTY_FUNCTION__)) | |||
20706 | "Unsupported custom type")(static_cast <bool> ((VecIntVT == MVT::v4i32 || VecIntVT == MVT::v8i32) && "Unsupported custom type") ? void ( 0) : __assert_fail ("(VecIntVT == MVT::v4i32 || VecIntVT == MVT::v8i32) && \"Unsupported custom type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 20706, __extension__ __PRETTY_FUNCTION__)); | |||
20707 | ||||
20708 | if (Subtarget.hasAVX512()) { | |||
20709 | // With AVX512, but not VLX we need to widen to get a 512-bit result type. | |||
20710 | assert(!Subtarget.hasVLX() && "Unexpected features")(static_cast <bool> (!Subtarget.hasVLX() && "Unexpected features" ) ? void (0) : __assert_fail ("!Subtarget.hasVLX() && \"Unexpected features\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 20710, __extension__ __PRETTY_FUNCTION__)); | |||
20711 | MVT VT = Op->getSimpleValueType(0); | |||
20712 | ||||
20713 | // v8i32->v8f64 is legal with AVX512 so just return it. | |||
20714 | if (VT == MVT::v8f64) | |||
20715 | return Op; | |||
20716 | ||||
20717 | assert((VT == MVT::v4f32 || VT == MVT::v8f32 || VT == MVT::v4f64) &&(static_cast <bool> ((VT == MVT::v4f32 || VT == MVT::v8f32 || VT == MVT::v4f64) && "Unexpected VT!") ? void (0) : __assert_fail ("(VT == MVT::v4f32 || VT == MVT::v8f32 || VT == MVT::v4f64) && \"Unexpected VT!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 20718, __extension__ __PRETTY_FUNCTION__)) | |||
20718 | "Unexpected VT!")(static_cast <bool> ((VT == MVT::v4f32 || VT == MVT::v8f32 || VT == MVT::v4f64) && "Unexpected VT!") ? void (0) : __assert_fail ("(VT == MVT::v4f32 || VT == MVT::v8f32 || VT == MVT::v4f64) && \"Unexpected VT!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 20718, __extension__ __PRETTY_FUNCTION__)); | |||
20719 | MVT WideVT = VT == MVT::v4f64 ? MVT::v8f64 : MVT::v16f32; | |||
20720 | MVT WideIntVT = VT == MVT::v4f64 ? MVT::v8i32 : MVT::v16i32; | |||
20721 | // Need to concat with zero vector for strict fp to avoid spurious | |||
20722 | // exceptions. | |||
20723 | SDValue Tmp = | |||
20724 | IsStrict ? DAG.getConstant(0, DL, WideIntVT) : DAG.getUNDEF(WideIntVT); | |||
20725 | V = DAG.getNode(ISD::INSERT_SUBVECTOR, DL, WideIntVT, Tmp, V, | |||
20726 | DAG.getIntPtrConstant(0, DL)); | |||
20727 | SDValue Res, Chain; | |||
20728 | if (IsStrict) { | |||
20729 | Res = DAG.getNode(ISD::STRICT_UINT_TO_FP, DL, {WideVT, MVT::Other}, | |||
20730 | {Op->getOperand(0), V}); | |||
20731 | Chain = Res.getValue(1); | |||
20732 | } else { | |||
20733 | Res = DAG.getNode(ISD::UINT_TO_FP, DL, WideVT, V); | |||
20734 | } | |||
20735 | ||||
20736 | Res = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, VT, Res, | |||
20737 | DAG.getIntPtrConstant(0, DL)); | |||
20738 | ||||
20739 | if (IsStrict) | |||
20740 | return DAG.getMergeValues({Res, Chain}, DL); | |||
20741 | return Res; | |||
20742 | } | |||
20743 | ||||
20744 | if (Subtarget.hasAVX() && VecIntVT == MVT::v4i32 && | |||
20745 | Op->getSimpleValueType(0) == MVT::v4f64) { | |||
20746 | SDValue ZExtIn = DAG.getNode(ISD::ZERO_EXTEND, DL, MVT::v4i64, V); | |||
20747 | Constant *Bias = ConstantFP::get( | |||
20748 | *DAG.getContext(), | |||
20749 | APFloat(APFloat::IEEEdouble(), APInt(64, 0x4330000000000000ULL))); | |||
20750 | auto PtrVT = DAG.getTargetLoweringInfo().getPointerTy(DAG.getDataLayout()); | |||
20751 | SDValue CPIdx = DAG.getConstantPool(Bias, PtrVT, Align(8)); | |||
20752 | SDVTList Tys = DAG.getVTList(MVT::v4f64, MVT::Other); | |||
20753 | SDValue Ops[] = {DAG.getEntryNode(), CPIdx}; | |||
20754 | SDValue VBias = DAG.getMemIntrinsicNode( | |||
20755 | X86ISD::VBROADCAST_LOAD, DL, Tys, Ops, MVT::f64, | |||
20756 | MachinePointerInfo::getConstantPool(DAG.getMachineFunction()), Align(8), | |||
20757 | MachineMemOperand::MOLoad); | |||
20758 | ||||
20759 | SDValue Or = DAG.getNode(ISD::OR, DL, MVT::v4i64, ZExtIn, | |||
20760 | DAG.getBitcast(MVT::v4i64, VBias)); | |||
20761 | Or = DAG.getBitcast(MVT::v4f64, Or); | |||
20762 | ||||
20763 | if (IsStrict) | |||
20764 | return DAG.getNode(ISD::STRICT_FSUB, DL, {MVT::v4f64, MVT::Other}, | |||
20765 | {Op.getOperand(0), Or, VBias}); | |||
20766 | return DAG.getNode(ISD::FSUB, DL, MVT::v4f64, Or, VBias); | |||
20767 | } | |||
20768 | ||||
20769 | // The algorithm is the following: | |||
20770 | // #ifdef __SSE4_1__ | |||
20771 | // uint4 lo = _mm_blend_epi16( v, (uint4) 0x4b000000, 0xaa); | |||
20772 | // uint4 hi = _mm_blend_epi16( _mm_srli_epi32(v,16), | |||
20773 | // (uint4) 0x53000000, 0xaa); | |||
20774 | // #else | |||
20775 | // uint4 lo = (v & (uint4) 0xffff) | (uint4) 0x4b000000; | |||
20776 | // uint4 hi = (v >> 16) | (uint4) 0x53000000; | |||
20777 | // #endif | |||
20778 | // float4 fhi = (float4) hi - (0x1.0p39f + 0x1.0p23f); | |||
20779 | // return (float4) lo + fhi; | |||
20780 | ||||
20781 | bool Is128 = VecIntVT == MVT::v4i32; | |||
20782 | MVT VecFloatVT = Is128 ? MVT::v4f32 : MVT::v8f32; | |||
20783 | // If we convert to something else than the supported type, e.g., to v4f64, | |||
20784 | // abort early. | |||
20785 | if (VecFloatVT != Op->getSimpleValueType(0)) | |||
20786 | return SDValue(); | |||
20787 | ||||
20788 | // In the #idef/#else code, we have in common: | |||
20789 | // - The vector of constants: | |||
20790 | // -- 0x4b000000 | |||
20791 | // -- 0x53000000 | |||
20792 | // - A shift: | |||
20793 | // -- v >> 16 | |||
20794 | ||||
20795 | // Create the splat vector for 0x4b000000. | |||
20796 | SDValue VecCstLow = DAG.getConstant(0x4b000000, DL, VecIntVT); | |||
20797 | // Create the splat vector for 0x53000000. | |||
20798 | SDValue VecCstHigh = DAG.getConstant(0x53000000, DL, VecIntVT); | |||
20799 | ||||
20800 | // Create the right shift. | |||
20801 | SDValue VecCstShift = DAG.getConstant(16, DL, VecIntVT); | |||
20802 | SDValue HighShift = DAG.getNode(ISD::SRL, DL, VecIntVT, V, VecCstShift); | |||
20803 | ||||
20804 | SDValue Low, High; | |||
20805 | if (Subtarget.hasSSE41()) { | |||
20806 | MVT VecI16VT = Is128 ? MVT::v8i16 : MVT::v16i16; | |||
20807 | // uint4 lo = _mm_blend_epi16( v, (uint4) 0x4b000000, 0xaa); | |||
20808 | SDValue VecCstLowBitcast = DAG.getBitcast(VecI16VT, VecCstLow); | |||
20809 | SDValue VecBitcast = DAG.getBitcast(VecI16VT, V); | |||
20810 | // Low will be bitcasted right away, so do not bother bitcasting back to its | |||
20811 | // original type. | |||
20812 | Low = DAG.getNode(X86ISD::BLENDI, DL, VecI16VT, VecBitcast, | |||
20813 | VecCstLowBitcast, DAG.getTargetConstant(0xaa, DL, MVT::i8)); | |||
20814 | // uint4 hi = _mm_blend_epi16( _mm_srli_epi32(v,16), | |||
20815 | // (uint4) 0x53000000, 0xaa); | |||
20816 | SDValue VecCstHighBitcast = DAG.getBitcast(VecI16VT, VecCstHigh); | |||
20817 | SDValue VecShiftBitcast = DAG.getBitcast(VecI16VT, HighShift); | |||
20818 | // High will be bitcasted right away, so do not bother bitcasting back to | |||
20819 | // its original type. | |||
20820 | High = DAG.getNode(X86ISD::BLENDI, DL, VecI16VT, VecShiftBitcast, | |||
20821 | VecCstHighBitcast, DAG.getTargetConstant(0xaa, DL, MVT::i8)); | |||
20822 | } else { | |||
20823 | SDValue VecCstMask = DAG.getConstant(0xffff, DL, VecIntVT); | |||
20824 | // uint4 lo = (v & (uint4) 0xffff) | (uint4) 0x4b000000; | |||
20825 | SDValue LowAnd = DAG.getNode(ISD::AND, DL, VecIntVT, V, VecCstMask); | |||
20826 | Low = DAG.getNode(ISD::OR, DL, VecIntVT, LowAnd, VecCstLow); | |||
20827 | ||||
20828 | // uint4 hi = (v >> 16) | (uint4) 0x53000000; | |||
20829 | High = DAG.getNode(ISD::OR, DL, VecIntVT, HighShift, VecCstHigh); | |||
20830 | } | |||
20831 | ||||
20832 | // Create the vector constant for (0x1.0p39f + 0x1.0p23f). | |||
20833 | SDValue VecCstFSub = DAG.getConstantFP( | |||
20834 | APFloat(APFloat::IEEEsingle(), APInt(32, 0x53000080)), DL, VecFloatVT); | |||
20835 | ||||
20836 | // float4 fhi = (float4) hi - (0x1.0p39f + 0x1.0p23f); | |||
20837 | // NOTE: By using fsub of a positive constant instead of fadd of a negative | |||
20838 | // constant, we avoid reassociation in MachineCombiner when unsafe-fp-math is | |||
20839 | // enabled. See PR24512. | |||
20840 | SDValue HighBitcast = DAG.getBitcast(VecFloatVT, High); | |||
20841 | // TODO: Are there any fast-math-flags to propagate here? | |||
20842 | // (float4) lo; | |||
20843 | SDValue LowBitcast = DAG.getBitcast(VecFloatVT, Low); | |||
20844 | // return (float4) lo + fhi; | |||
20845 | if (IsStrict) { | |||
20846 | SDValue FHigh = DAG.getNode(ISD::STRICT_FSUB, DL, {VecFloatVT, MVT::Other}, | |||
20847 | {Op.getOperand(0), HighBitcast, VecCstFSub}); | |||
20848 | return DAG.getNode(ISD::STRICT_FADD, DL, {VecFloatVT, MVT::Other}, | |||
20849 | {FHigh.getValue(1), LowBitcast, FHigh}); | |||
20850 | } | |||
20851 | ||||
20852 | SDValue FHigh = | |||
20853 | DAG.getNode(ISD::FSUB, DL, VecFloatVT, HighBitcast, VecCstFSub); | |||
20854 | return DAG.getNode(ISD::FADD, DL, VecFloatVT, LowBitcast, FHigh); | |||
20855 | } | |||
20856 | ||||
20857 | static SDValue lowerUINT_TO_FP_vec(SDValue Op, SelectionDAG &DAG, | |||
20858 | const X86Subtarget &Subtarget) { | |||
20859 | unsigned OpNo = Op.getNode()->isStrictFPOpcode() ? 1 : 0; | |||
20860 | SDValue N0 = Op.getOperand(OpNo); | |||
20861 | MVT SrcVT = N0.getSimpleValueType(); | |||
20862 | SDLoc dl(Op); | |||
20863 | ||||
20864 | switch (SrcVT.SimpleTy) { | |||
20865 | default: | |||
20866 | llvm_unreachable("Custom UINT_TO_FP is not supported!")::llvm::llvm_unreachable_internal("Custom UINT_TO_FP is not supported!" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 20866); | |||
20867 | case MVT::v2i32: | |||
20868 | return lowerUINT_TO_FP_v2i32(Op, DAG, Subtarget, dl); | |||
20869 | case MVT::v4i32: | |||
20870 | case MVT::v8i32: | |||
20871 | return lowerUINT_TO_FP_vXi32(Op, DAG, Subtarget); | |||
20872 | case MVT::v2i64: | |||
20873 | case MVT::v4i64: | |||
20874 | return lowerINT_TO_FP_vXi64(Op, DAG, Subtarget); | |||
20875 | } | |||
20876 | } | |||
20877 | ||||
20878 | SDValue X86TargetLowering::LowerUINT_TO_FP(SDValue Op, | |||
20879 | SelectionDAG &DAG) const { | |||
20880 | bool IsStrict = Op->isStrictFPOpcode(); | |||
20881 | unsigned OpNo = IsStrict ? 1 : 0; | |||
20882 | SDValue Src = Op.getOperand(OpNo); | |||
20883 | SDLoc dl(Op); | |||
20884 | auto PtrVT = getPointerTy(DAG.getDataLayout()); | |||
20885 | MVT SrcVT = Src.getSimpleValueType(); | |||
20886 | MVT DstVT = Op->getSimpleValueType(0); | |||
20887 | SDValue Chain = IsStrict ? Op.getOperand(0) : DAG.getEntryNode(); | |||
20888 | ||||
20889 | if (DstVT == MVT::f128) | |||
20890 | return SDValue(); | |||
20891 | ||||
20892 | if (DstVT.isVector()) | |||
20893 | return lowerUINT_TO_FP_vec(Op, DAG, Subtarget); | |||
20894 | ||||
20895 | if (SDValue Extract = vectorizeExtractedCast(Op, DAG, Subtarget)) | |||
20896 | return Extract; | |||
20897 | ||||
20898 | if (Subtarget.hasAVX512() && isScalarFPTypeInSSEReg(DstVT) && | |||
20899 | (SrcVT == MVT::i32 || (SrcVT == MVT::i64 && Subtarget.is64Bit()))) { | |||
20900 | // Conversions from unsigned i32 to f32/f64 are legal, | |||
20901 | // using VCVTUSI2SS/SD. Same for i64 in 64-bit mode. | |||
20902 | return Op; | |||
20903 | } | |||
20904 | ||||
20905 | // Promote i32 to i64 and use a signed conversion on 64-bit targets. | |||
20906 | if (SrcVT == MVT::i32 && Subtarget.is64Bit()) { | |||
20907 | Src = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i64, Src); | |||
20908 | if (IsStrict) | |||
20909 | return DAG.getNode(ISD::STRICT_SINT_TO_FP, dl, {DstVT, MVT::Other}, | |||
20910 | {Chain, Src}); | |||
20911 | return DAG.getNode(ISD::SINT_TO_FP, dl, DstVT, Src); | |||
20912 | } | |||
20913 | ||||
20914 | if (SDValue V = LowerI64IntToFP_AVX512DQ(Op, DAG, Subtarget)) | |||
20915 | return V; | |||
20916 | if (SDValue V = LowerI64IntToFP16(Op, DAG, Subtarget)) | |||
20917 | return V; | |||
20918 | ||||
20919 | // The transform for i64->f64 isn't correct for 0 when rounding to negative | |||
20920 | // infinity. It produces -0.0, so disable under strictfp. | |||
20921 | if (SrcVT == MVT::i64 && DstVT == MVT::f64 && X86ScalarSSEf64 && !IsStrict) | |||
20922 | return LowerUINT_TO_FP_i64(Op, DAG, Subtarget); | |||
20923 | if (SrcVT == MVT::i32 && X86ScalarSSEf64 && DstVT != MVT::f80) | |||
20924 | return LowerUINT_TO_FP_i32(Op, DAG, Subtarget); | |||
20925 | if (Subtarget.is64Bit() && SrcVT == MVT::i64 && | |||
20926 | (DstVT == MVT::f32 || DstVT == MVT::f64)) | |||
20927 | return SDValue(); | |||
20928 | ||||
20929 | // Make a 64-bit buffer, and use it to build an FILD. | |||
20930 | SDValue StackSlot = DAG.CreateStackTemporary(MVT::i64, 8); | |||
20931 | int SSFI = cast<FrameIndexSDNode>(StackSlot)->getIndex(); | |||
20932 | Align SlotAlign(8); | |||
20933 | MachinePointerInfo MPI = | |||
20934 | MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), SSFI); | |||
20935 | if (SrcVT == MVT::i32) { | |||
20936 | SDValue OffsetSlot = | |||
20937 | DAG.getMemBasePlusOffset(StackSlot, TypeSize::Fixed(4), dl); | |||
20938 | SDValue Store1 = DAG.getStore(Chain, dl, Src, StackSlot, MPI, SlotAlign); | |||
20939 | SDValue Store2 = DAG.getStore(Store1, dl, DAG.getConstant(0, dl, MVT::i32), | |||
20940 | OffsetSlot, MPI.getWithOffset(4), SlotAlign); | |||
20941 | std::pair<SDValue, SDValue> Tmp = | |||
20942 | BuildFILD(DstVT, MVT::i64, dl, Store2, StackSlot, MPI, SlotAlign, DAG); | |||
20943 | if (IsStrict) | |||
20944 | return DAG.getMergeValues({Tmp.first, Tmp.second}, dl); | |||
20945 | ||||
20946 | return Tmp.first; | |||
20947 | } | |||
20948 | ||||
20949 | assert(SrcVT == MVT::i64 && "Unexpected type in UINT_TO_FP")(static_cast <bool> (SrcVT == MVT::i64 && "Unexpected type in UINT_TO_FP" ) ? void (0) : __assert_fail ("SrcVT == MVT::i64 && \"Unexpected type in UINT_TO_FP\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 20949, __extension__ __PRETTY_FUNCTION__)); | |||
20950 | SDValue ValueToStore = Src; | |||
20951 | if (isScalarFPTypeInSSEReg(Op.getValueType()) && !Subtarget.is64Bit()) { | |||
20952 | // Bitcasting to f64 here allows us to do a single 64-bit store from | |||
20953 | // an SSE register, avoiding the store forwarding penalty that would come | |||
20954 | // with two 32-bit stores. | |||
20955 | ValueToStore = DAG.getBitcast(MVT::f64, ValueToStore); | |||
20956 | } | |||
20957 | SDValue Store = | |||
20958 | DAG.getStore(Chain, dl, ValueToStore, StackSlot, MPI, SlotAlign); | |||
20959 | // For i64 source, we need to add the appropriate power of 2 if the input | |||
20960 | // was negative. We must be careful to do the computation in x87 extended | |||
20961 | // precision, not in SSE. | |||
20962 | SDVTList Tys = DAG.getVTList(MVT::f80, MVT::Other); | |||
20963 | SDValue Ops[] = { Store, StackSlot }; | |||
20964 | SDValue Fild = | |||
20965 | DAG.getMemIntrinsicNode(X86ISD::FILD, dl, Tys, Ops, MVT::i64, MPI, | |||
20966 | SlotAlign, MachineMemOperand::MOLoad); | |||
20967 | Chain = Fild.getValue(1); | |||
20968 | ||||
20969 | ||||
20970 | // Check whether the sign bit is set. | |||
20971 | SDValue SignSet = DAG.getSetCC( | |||
20972 | dl, getSetCCResultType(DAG.getDataLayout(), *DAG.getContext(), MVT::i64), | |||
20973 | Op.getOperand(OpNo), DAG.getConstant(0, dl, MVT::i64), ISD::SETLT); | |||
20974 | ||||
20975 | // Build a 64 bit pair (FF, 0) in the constant pool, with FF in the hi bits. | |||
20976 | APInt FF(64, 0x5F80000000000000ULL); | |||
20977 | SDValue FudgePtr = DAG.getConstantPool( | |||
20978 | ConstantInt::get(*DAG.getContext(), FF), PtrVT); | |||
20979 | Align CPAlignment = cast<ConstantPoolSDNode>(FudgePtr)->getAlign(); | |||
20980 | ||||
20981 | // Get a pointer to FF if the sign bit was set, or to 0 otherwise. | |||
20982 | SDValue Zero = DAG.getIntPtrConstant(0, dl); | |||
20983 | SDValue Four = DAG.getIntPtrConstant(4, dl); | |||
20984 | SDValue Offset = DAG.getSelect(dl, Zero.getValueType(), SignSet, Four, Zero); | |||
20985 | FudgePtr = DAG.getNode(ISD::ADD, dl, PtrVT, FudgePtr, Offset); | |||
20986 | ||||
20987 | // Load the value out, extending it from f32 to f80. | |||
20988 | SDValue Fudge = DAG.getExtLoad( | |||
20989 | ISD::EXTLOAD, dl, MVT::f80, Chain, FudgePtr, | |||
20990 | MachinePointerInfo::getConstantPool(DAG.getMachineFunction()), MVT::f32, | |||
20991 | CPAlignment); | |||
20992 | Chain = Fudge.getValue(1); | |||
20993 | // Extend everything to 80 bits to force it to be done on x87. | |||
20994 | // TODO: Are there any fast-math-flags to propagate here? | |||
20995 | if (IsStrict) { | |||
20996 | SDValue Add = DAG.getNode(ISD::STRICT_FADD, dl, {MVT::f80, MVT::Other}, | |||
20997 | {Chain, Fild, Fudge}); | |||
20998 | // STRICT_FP_ROUND can't handle equal types. | |||
20999 | if (DstVT == MVT::f80) | |||
21000 | return Add; | |||
21001 | return DAG.getNode(ISD::STRICT_FP_ROUND, dl, {DstVT, MVT::Other}, | |||
21002 | {Add.getValue(1), Add, DAG.getIntPtrConstant(0, dl)}); | |||
21003 | } | |||
21004 | SDValue Add = DAG.getNode(ISD::FADD, dl, MVT::f80, Fild, Fudge); | |||
21005 | return DAG.getNode(ISD::FP_ROUND, dl, DstVT, Add, | |||
21006 | DAG.getIntPtrConstant(0, dl)); | |||
21007 | } | |||
21008 | ||||
21009 | // If the given FP_TO_SINT (IsSigned) or FP_TO_UINT (!IsSigned) operation | |||
21010 | // is legal, or has an fp128 or f16 source (which needs to be promoted to f32), | |||
21011 | // just return an SDValue(). | |||
21012 | // Otherwise it is assumed to be a conversion from one of f32, f64 or f80 | |||
21013 | // to i16, i32 or i64, and we lower it to a legal sequence and return the | |||
21014 | // result. | |||
21015 | SDValue | |||
21016 | X86TargetLowering::FP_TO_INTHelper(SDValue Op, SelectionDAG &DAG, | |||
21017 | bool IsSigned, SDValue &Chain) const { | |||
21018 | bool IsStrict = Op->isStrictFPOpcode(); | |||
21019 | SDLoc DL(Op); | |||
21020 | ||||
21021 | EVT DstTy = Op.getValueType(); | |||
21022 | SDValue Value = Op.getOperand(IsStrict ? 1 : 0); | |||
21023 | EVT TheVT = Value.getValueType(); | |||
21024 | auto PtrVT = getPointerTy(DAG.getDataLayout()); | |||
21025 | ||||
21026 | if (TheVT != MVT::f32 && TheVT != MVT::f64 && TheVT != MVT::f80) { | |||
21027 | // f16 must be promoted before using the lowering in this routine. | |||
21028 | // fp128 does not use this lowering. | |||
21029 | return SDValue(); | |||
21030 | } | |||
21031 | ||||
21032 | // If using FIST to compute an unsigned i64, we'll need some fixup | |||
21033 | // to handle values above the maximum signed i64. A FIST is always | |||
21034 | // used for the 32-bit subtarget, but also for f80 on a 64-bit target. | |||
21035 | bool UnsignedFixup = !IsSigned && DstTy == MVT::i64; | |||
21036 | ||||
21037 | // FIXME: This does not generate an invalid exception if the input does not | |||
21038 | // fit in i32. PR44019 | |||
21039 | if (!IsSigned && DstTy != MVT::i64) { | |||
21040 | // Replace the fp-to-uint32 operation with an fp-to-sint64 FIST. | |||
21041 | // The low 32 bits of the fist result will have the correct uint32 result. | |||
21042 | assert(DstTy == MVT::i32 && "Unexpected FP_TO_UINT")(static_cast <bool> (DstTy == MVT::i32 && "Unexpected FP_TO_UINT" ) ? void (0) : __assert_fail ("DstTy == MVT::i32 && \"Unexpected FP_TO_UINT\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21042, __extension__ __PRETTY_FUNCTION__)); | |||
21043 | DstTy = MVT::i64; | |||
21044 | } | |||
21045 | ||||
21046 | assert(DstTy.getSimpleVT() <= MVT::i64 &&(static_cast <bool> (DstTy.getSimpleVT() <= MVT::i64 && DstTy.getSimpleVT() >= MVT::i16 && "Unknown FP_TO_INT to lower!" ) ? void (0) : __assert_fail ("DstTy.getSimpleVT() <= MVT::i64 && DstTy.getSimpleVT() >= MVT::i16 && \"Unknown FP_TO_INT to lower!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21048, __extension__ __PRETTY_FUNCTION__)) | |||
21047 | DstTy.getSimpleVT() >= MVT::i16 &&(static_cast <bool> (DstTy.getSimpleVT() <= MVT::i64 && DstTy.getSimpleVT() >= MVT::i16 && "Unknown FP_TO_INT to lower!" ) ? void (0) : __assert_fail ("DstTy.getSimpleVT() <= MVT::i64 && DstTy.getSimpleVT() >= MVT::i16 && \"Unknown FP_TO_INT to lower!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21048, __extension__ __PRETTY_FUNCTION__)) | |||
21048 | "Unknown FP_TO_INT to lower!")(static_cast <bool> (DstTy.getSimpleVT() <= MVT::i64 && DstTy.getSimpleVT() >= MVT::i16 && "Unknown FP_TO_INT to lower!" ) ? void (0) : __assert_fail ("DstTy.getSimpleVT() <= MVT::i64 && DstTy.getSimpleVT() >= MVT::i16 && \"Unknown FP_TO_INT to lower!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21048, __extension__ __PRETTY_FUNCTION__)); | |||
21049 | ||||
21050 | // We lower FP->int64 into FISTP64 followed by a load from a temporary | |||
21051 | // stack slot. | |||
21052 | MachineFunction &MF = DAG.getMachineFunction(); | |||
21053 | unsigned MemSize = DstTy.getStoreSize(); | |||
21054 | int SSFI = | |||
21055 | MF.getFrameInfo().CreateStackObject(MemSize, Align(MemSize), false); | |||
21056 | SDValue StackSlot = DAG.getFrameIndex(SSFI, PtrVT); | |||
21057 | ||||
21058 | Chain = IsStrict ? Op.getOperand(0) : DAG.getEntryNode(); | |||
21059 | ||||
21060 | SDValue Adjust; // 0x0 or 0x80000000, for result sign bit adjustment. | |||
21061 | ||||
21062 | if (UnsignedFixup) { | |||
21063 | // | |||
21064 | // Conversion to unsigned i64 is implemented with a select, | |||
21065 | // depending on whether the source value fits in the range | |||
21066 | // of a signed i64. Let Thresh be the FP equivalent of | |||
21067 | // 0x8000000000000000ULL. | |||
21068 | // | |||
21069 | // Adjust = (Value >= Thresh) ? 0x80000000 : 0; | |||
21070 | // FltOfs = (Value >= Thresh) ? 0x80000000 : 0; | |||
21071 | // FistSrc = (Value - FltOfs); | |||
21072 | // Fist-to-mem64 FistSrc | |||
21073 | // Add 0 or 0x800...0ULL to the 64-bit result, which is equivalent | |||
21074 | // to XOR'ing the high 32 bits with Adjust. | |||
21075 | // | |||
21076 | // Being a power of 2, Thresh is exactly representable in all FP formats. | |||
21077 | // For X87 we'd like to use the smallest FP type for this constant, but | |||
21078 | // for DAG type consistency we have to match the FP operand type. | |||
21079 | ||||
21080 | APFloat Thresh(APFloat::IEEEsingle(), APInt(32, 0x5f000000)); | |||
21081 | LLVM_ATTRIBUTE_UNUSED__attribute__((__unused__)) APFloat::opStatus Status = APFloat::opOK; | |||
21082 | bool LosesInfo = false; | |||
21083 | if (TheVT == MVT::f64) | |||
21084 | // The rounding mode is irrelevant as the conversion should be exact. | |||
21085 | Status = Thresh.convert(APFloat::IEEEdouble(), APFloat::rmNearestTiesToEven, | |||
21086 | &LosesInfo); | |||
21087 | else if (TheVT == MVT::f80) | |||
21088 | Status = Thresh.convert(APFloat::x87DoubleExtended(), | |||
21089 | APFloat::rmNearestTiesToEven, &LosesInfo); | |||
21090 | ||||
21091 | assert(Status == APFloat::opOK && !LosesInfo &&(static_cast <bool> (Status == APFloat::opOK && !LosesInfo && "FP conversion should have been exact" ) ? void (0) : __assert_fail ("Status == APFloat::opOK && !LosesInfo && \"FP conversion should have been exact\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21092, __extension__ __PRETTY_FUNCTION__)) | |||
21092 | "FP conversion should have been exact")(static_cast <bool> (Status == APFloat::opOK && !LosesInfo && "FP conversion should have been exact" ) ? void (0) : __assert_fail ("Status == APFloat::opOK && !LosesInfo && \"FP conversion should have been exact\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21092, __extension__ __PRETTY_FUNCTION__)); | |||
21093 | ||||
21094 | SDValue ThreshVal = DAG.getConstantFP(Thresh, DL, TheVT); | |||
21095 | ||||
21096 | EVT ResVT = getSetCCResultType(DAG.getDataLayout(), | |||
21097 | *DAG.getContext(), TheVT); | |||
21098 | SDValue Cmp; | |||
21099 | if (IsStrict) { | |||
21100 | Cmp = DAG.getSetCC(DL, ResVT, Value, ThreshVal, ISD::SETGE, Chain, | |||
21101 | /*IsSignaling*/ true); | |||
21102 | Chain = Cmp.getValue(1); | |||
21103 | } else { | |||
21104 | Cmp = DAG.getSetCC(DL, ResVT, Value, ThreshVal, ISD::SETGE); | |||
21105 | } | |||
21106 | ||||
21107 | // Our preferred lowering of | |||
21108 | // | |||
21109 | // (Value >= Thresh) ? 0x8000000000000000ULL : 0 | |||
21110 | // | |||
21111 | // is | |||
21112 | // | |||
21113 | // (Value >= Thresh) << 63 | |||
21114 | // | |||
21115 | // but since we can get here after LegalOperations, DAGCombine might do the | |||
21116 | // wrong thing if we create a select. So, directly create the preferred | |||
21117 | // version. | |||
21118 | SDValue Zext = DAG.getNode(ISD::ZERO_EXTEND, DL, MVT::i64, Cmp); | |||
21119 | SDValue Const63 = DAG.getConstant(63, DL, MVT::i8); | |||
21120 | Adjust = DAG.getNode(ISD::SHL, DL, MVT::i64, Zext, Const63); | |||
21121 | ||||
21122 | SDValue FltOfs = DAG.getSelect(DL, TheVT, Cmp, ThreshVal, | |||
21123 | DAG.getConstantFP(0.0, DL, TheVT)); | |||
21124 | ||||
21125 | if (IsStrict) { | |||
21126 | Value = DAG.getNode(ISD::STRICT_FSUB, DL, { TheVT, MVT::Other}, | |||
21127 | { Chain, Value, FltOfs }); | |||
21128 | Chain = Value.getValue(1); | |||
21129 | } else | |||
21130 | Value = DAG.getNode(ISD::FSUB, DL, TheVT, Value, FltOfs); | |||
21131 | } | |||
21132 | ||||
21133 | MachinePointerInfo MPI = MachinePointerInfo::getFixedStack(MF, SSFI); | |||
21134 | ||||
21135 | // FIXME This causes a redundant load/store if the SSE-class value is already | |||
21136 | // in memory, such as if it is on the callstack. | |||
21137 | if (isScalarFPTypeInSSEReg(TheVT)) { | |||
21138 | assert(DstTy == MVT::i64 && "Invalid FP_TO_SINT to lower!")(static_cast <bool> (DstTy == MVT::i64 && "Invalid FP_TO_SINT to lower!" ) ? void (0) : __assert_fail ("DstTy == MVT::i64 && \"Invalid FP_TO_SINT to lower!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21138, __extension__ __PRETTY_FUNCTION__)); | |||
21139 | Chain = DAG.getStore(Chain, DL, Value, StackSlot, MPI); | |||
21140 | SDVTList Tys = DAG.getVTList(MVT::f80, MVT::Other); | |||
21141 | SDValue Ops[] = { Chain, StackSlot }; | |||
21142 | ||||
21143 | unsigned FLDSize = TheVT.getStoreSize(); | |||
21144 | assert(FLDSize <= MemSize && "Stack slot not big enough")(static_cast <bool> (FLDSize <= MemSize && "Stack slot not big enough" ) ? void (0) : __assert_fail ("FLDSize <= MemSize && \"Stack slot not big enough\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21144, __extension__ __PRETTY_FUNCTION__)); | |||
21145 | MachineMemOperand *MMO = MF.getMachineMemOperand( | |||
21146 | MPI, MachineMemOperand::MOLoad, FLDSize, Align(FLDSize)); | |||
21147 | Value = DAG.getMemIntrinsicNode(X86ISD::FLD, DL, Tys, Ops, TheVT, MMO); | |||
21148 | Chain = Value.getValue(1); | |||
21149 | } | |||
21150 | ||||
21151 | // Build the FP_TO_INT*_IN_MEM | |||
21152 | MachineMemOperand *MMO = MF.getMachineMemOperand( | |||
21153 | MPI, MachineMemOperand::MOStore, MemSize, Align(MemSize)); | |||
21154 | SDValue Ops[] = { Chain, Value, StackSlot }; | |||
21155 | SDValue FIST = DAG.getMemIntrinsicNode(X86ISD::FP_TO_INT_IN_MEM, DL, | |||
21156 | DAG.getVTList(MVT::Other), | |||
21157 | Ops, DstTy, MMO); | |||
21158 | ||||
21159 | SDValue Res = DAG.getLoad(Op.getValueType(), SDLoc(Op), FIST, StackSlot, MPI); | |||
21160 | Chain = Res.getValue(1); | |||
21161 | ||||
21162 | // If we need an unsigned fixup, XOR the result with adjust. | |||
21163 | if (UnsignedFixup) | |||
21164 | Res = DAG.getNode(ISD::XOR, DL, MVT::i64, Res, Adjust); | |||
21165 | ||||
21166 | return Res; | |||
21167 | } | |||
21168 | ||||
21169 | static SDValue LowerAVXExtend(SDValue Op, SelectionDAG &DAG, | |||
21170 | const X86Subtarget &Subtarget) { | |||
21171 | MVT VT = Op.getSimpleValueType(); | |||
21172 | SDValue In = Op.getOperand(0); | |||
21173 | MVT InVT = In.getSimpleValueType(); | |||
21174 | SDLoc dl(Op); | |||
21175 | unsigned Opc = Op.getOpcode(); | |||
21176 | ||||
21177 | assert(VT.isVector() && InVT.isVector() && "Expected vector type")(static_cast <bool> (VT.isVector() && InVT.isVector () && "Expected vector type") ? void (0) : __assert_fail ("VT.isVector() && InVT.isVector() && \"Expected vector type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21177, __extension__ __PRETTY_FUNCTION__)); | |||
21178 | assert((Opc == ISD::ANY_EXTEND || Opc == ISD::ZERO_EXTEND) &&(static_cast <bool> ((Opc == ISD::ANY_EXTEND || Opc == ISD ::ZERO_EXTEND) && "Unexpected extension opcode") ? void (0) : __assert_fail ("(Opc == ISD::ANY_EXTEND || Opc == ISD::ZERO_EXTEND) && \"Unexpected extension opcode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21179, __extension__ __PRETTY_FUNCTION__)) | |||
21179 | "Unexpected extension opcode")(static_cast <bool> ((Opc == ISD::ANY_EXTEND || Opc == ISD ::ZERO_EXTEND) && "Unexpected extension opcode") ? void (0) : __assert_fail ("(Opc == ISD::ANY_EXTEND || Opc == ISD::ZERO_EXTEND) && \"Unexpected extension opcode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21179, __extension__ __PRETTY_FUNCTION__)); | |||
21180 | assert(VT.getVectorNumElements() == InVT.getVectorNumElements() &&(static_cast <bool> (VT.getVectorNumElements() == InVT. getVectorNumElements() && "Expected same number of elements" ) ? void (0) : __assert_fail ("VT.getVectorNumElements() == InVT.getVectorNumElements() && \"Expected same number of elements\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21181, __extension__ __PRETTY_FUNCTION__)) | |||
21181 | "Expected same number of elements")(static_cast <bool> (VT.getVectorNumElements() == InVT. getVectorNumElements() && "Expected same number of elements" ) ? void (0) : __assert_fail ("VT.getVectorNumElements() == InVT.getVectorNumElements() && \"Expected same number of elements\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21181, __extension__ __PRETTY_FUNCTION__)); | |||
21182 | assert((VT.getVectorElementType() == MVT::i16 ||(static_cast <bool> ((VT.getVectorElementType() == MVT:: i16 || VT.getVectorElementType() == MVT::i32 || VT.getVectorElementType () == MVT::i64) && "Unexpected element type") ? void ( 0) : __assert_fail ("(VT.getVectorElementType() == MVT::i16 || VT.getVectorElementType() == MVT::i32 || VT.getVectorElementType() == MVT::i64) && \"Unexpected element type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21185, __extension__ __PRETTY_FUNCTION__)) | |||
21183 | VT.getVectorElementType() == MVT::i32 ||(static_cast <bool> ((VT.getVectorElementType() == MVT:: i16 || VT.getVectorElementType() == MVT::i32 || VT.getVectorElementType () == MVT::i64) && "Unexpected element type") ? void ( 0) : __assert_fail ("(VT.getVectorElementType() == MVT::i16 || VT.getVectorElementType() == MVT::i32 || VT.getVectorElementType() == MVT::i64) && \"Unexpected element type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21185, __extension__ __PRETTY_FUNCTION__)) | |||
21184 | VT.getVectorElementType() == MVT::i64) &&(static_cast <bool> ((VT.getVectorElementType() == MVT:: i16 || VT.getVectorElementType() == MVT::i32 || VT.getVectorElementType () == MVT::i64) && "Unexpected element type") ? void ( 0) : __assert_fail ("(VT.getVectorElementType() == MVT::i16 || VT.getVectorElementType() == MVT::i32 || VT.getVectorElementType() == MVT::i64) && \"Unexpected element type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21185, __extension__ __PRETTY_FUNCTION__)) | |||
21185 | "Unexpected element type")(static_cast <bool> ((VT.getVectorElementType() == MVT:: i16 || VT.getVectorElementType() == MVT::i32 || VT.getVectorElementType () == MVT::i64) && "Unexpected element type") ? void ( 0) : __assert_fail ("(VT.getVectorElementType() == MVT::i16 || VT.getVectorElementType() == MVT::i32 || VT.getVectorElementType() == MVT::i64) && \"Unexpected element type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21185, __extension__ __PRETTY_FUNCTION__)); | |||
21186 | assert((InVT.getVectorElementType() == MVT::i8 ||(static_cast <bool> ((InVT.getVectorElementType() == MVT ::i8 || InVT.getVectorElementType() == MVT::i16 || InVT.getVectorElementType () == MVT::i32) && "Unexpected element type") ? void ( 0) : __assert_fail ("(InVT.getVectorElementType() == MVT::i8 || InVT.getVectorElementType() == MVT::i16 || InVT.getVectorElementType() == MVT::i32) && \"Unexpected element type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21189, __extension__ __PRETTY_FUNCTION__)) | |||
21187 | InVT.getVectorElementType() == MVT::i16 ||(static_cast <bool> ((InVT.getVectorElementType() == MVT ::i8 || InVT.getVectorElementType() == MVT::i16 || InVT.getVectorElementType () == MVT::i32) && "Unexpected element type") ? void ( 0) : __assert_fail ("(InVT.getVectorElementType() == MVT::i8 || InVT.getVectorElementType() == MVT::i16 || InVT.getVectorElementType() == MVT::i32) && \"Unexpected element type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21189, __extension__ __PRETTY_FUNCTION__)) | |||
21188 | InVT.getVectorElementType() == MVT::i32) &&(static_cast <bool> ((InVT.getVectorElementType() == MVT ::i8 || InVT.getVectorElementType() == MVT::i16 || InVT.getVectorElementType () == MVT::i32) && "Unexpected element type") ? void ( 0) : __assert_fail ("(InVT.getVectorElementType() == MVT::i8 || InVT.getVectorElementType() == MVT::i16 || InVT.getVectorElementType() == MVT::i32) && \"Unexpected element type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21189, __extension__ __PRETTY_FUNCTION__)) | |||
21189 | "Unexpected element type")(static_cast <bool> ((InVT.getVectorElementType() == MVT ::i8 || InVT.getVectorElementType() == MVT::i16 || InVT.getVectorElementType () == MVT::i32) && "Unexpected element type") ? void ( 0) : __assert_fail ("(InVT.getVectorElementType() == MVT::i8 || InVT.getVectorElementType() == MVT::i16 || InVT.getVectorElementType() == MVT::i32) && \"Unexpected element type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21189, __extension__ __PRETTY_FUNCTION__)); | |||
21190 | ||||
21191 | unsigned ExtendInVecOpc = getOpcode_EXTEND_VECTOR_INREG(Opc); | |||
21192 | ||||
21193 | if (VT == MVT::v32i16 && !Subtarget.hasBWI()) { | |||
21194 | assert(InVT == MVT::v32i8 && "Unexpected VT!")(static_cast <bool> (InVT == MVT::v32i8 && "Unexpected VT!" ) ? void (0) : __assert_fail ("InVT == MVT::v32i8 && \"Unexpected VT!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21194, __extension__ __PRETTY_FUNCTION__)); | |||
21195 | return splitVectorIntUnary(Op, DAG); | |||
21196 | } | |||
21197 | ||||
21198 | if (Subtarget.hasInt256()) | |||
21199 | return Op; | |||
21200 | ||||
21201 | // Optimize vectors in AVX mode: | |||
21202 | // | |||
21203 | // v8i16 -> v8i32 | |||
21204 | // Use vpmovzwd for 4 lower elements v8i16 -> v4i32. | |||
21205 | // Use vpunpckhwd for 4 upper elements v8i16 -> v4i32. | |||
21206 | // Concat upper and lower parts. | |||
21207 | // | |||
21208 | // v4i32 -> v4i64 | |||
21209 | // Use vpmovzdq for 4 lower elements v4i32 -> v2i64. | |||
21210 | // Use vpunpckhdq for 4 upper elements v4i32 -> v2i64. | |||
21211 | // Concat upper and lower parts. | |||
21212 | // | |||
21213 | MVT HalfVT = VT.getHalfNumVectorElementsVT(); | |||
21214 | SDValue OpLo = DAG.getNode(ExtendInVecOpc, dl, HalfVT, In); | |||
21215 | ||||
21216 | // Short-circuit if we can determine that each 128-bit half is the same value. | |||
21217 | // Otherwise, this is difficult to match and optimize. | |||
21218 | if (auto *Shuf = dyn_cast<ShuffleVectorSDNode>(In)) | |||
21219 | if (hasIdenticalHalvesShuffleMask(Shuf->getMask())) | |||
21220 | return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, OpLo, OpLo); | |||
21221 | ||||
21222 | SDValue ZeroVec = DAG.getConstant(0, dl, InVT); | |||
21223 | SDValue Undef = DAG.getUNDEF(InVT); | |||
21224 | bool NeedZero = Opc == ISD::ZERO_EXTEND; | |||
21225 | SDValue OpHi = getUnpackh(DAG, dl, InVT, In, NeedZero ? ZeroVec : Undef); | |||
21226 | OpHi = DAG.getBitcast(HalfVT, OpHi); | |||
21227 | ||||
21228 | return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, OpLo, OpHi); | |||
21229 | } | |||
21230 | ||||
21231 | // Helper to split and extend a v16i1 mask to v16i8 or v16i16. | |||
21232 | static SDValue SplitAndExtendv16i1(unsigned ExtOpc, MVT VT, SDValue In, | |||
21233 | const SDLoc &dl, SelectionDAG &DAG) { | |||
21234 | assert((VT == MVT::v16i8 || VT == MVT::v16i16) && "Unexpected VT.")(static_cast <bool> ((VT == MVT::v16i8 || VT == MVT::v16i16 ) && "Unexpected VT.") ? void (0) : __assert_fail ("(VT == MVT::v16i8 || VT == MVT::v16i16) && \"Unexpected VT.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21234, __extension__ __PRETTY_FUNCTION__)); | |||
21235 | SDValue Lo = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v8i1, In, | |||
21236 | DAG.getIntPtrConstant(0, dl)); | |||
21237 | SDValue Hi = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v8i1, In, | |||
21238 | DAG.getIntPtrConstant(8, dl)); | |||
21239 | Lo = DAG.getNode(ExtOpc, dl, MVT::v8i16, Lo); | |||
21240 | Hi = DAG.getNode(ExtOpc, dl, MVT::v8i16, Hi); | |||
21241 | SDValue Res = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v16i16, Lo, Hi); | |||
21242 | return DAG.getNode(ISD::TRUNCATE, dl, VT, Res); | |||
21243 | } | |||
21244 | ||||
21245 | static SDValue LowerZERO_EXTEND_Mask(SDValue Op, | |||
21246 | const X86Subtarget &Subtarget, | |||
21247 | SelectionDAG &DAG) { | |||
21248 | MVT VT = Op->getSimpleValueType(0); | |||
21249 | SDValue In = Op->getOperand(0); | |||
21250 | MVT InVT = In.getSimpleValueType(); | |||
21251 | assert(InVT.getVectorElementType() == MVT::i1 && "Unexpected input type!")(static_cast <bool> (InVT.getVectorElementType() == MVT ::i1 && "Unexpected input type!") ? void (0) : __assert_fail ("InVT.getVectorElementType() == MVT::i1 && \"Unexpected input type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21251, __extension__ __PRETTY_FUNCTION__)); | |||
21252 | SDLoc DL(Op); | |||
21253 | unsigned NumElts = VT.getVectorNumElements(); | |||
21254 | ||||
21255 | // For all vectors, but vXi8 we can just emit a sign_extend and a shift. This | |||
21256 | // avoids a constant pool load. | |||
21257 | if (VT.getVectorElementType() != MVT::i8) { | |||
21258 | SDValue Extend = DAG.getNode(ISD::SIGN_EXTEND, DL, VT, In); | |||
21259 | return DAG.getNode(ISD::SRL, DL, VT, Extend, | |||
21260 | DAG.getConstant(VT.getScalarSizeInBits() - 1, DL, VT)); | |||
21261 | } | |||
21262 | ||||
21263 | // Extend VT if BWI is not supported. | |||
21264 | MVT ExtVT = VT; | |||
21265 | if (!Subtarget.hasBWI()) { | |||
21266 | // If v16i32 is to be avoided, we'll need to split and concatenate. | |||
21267 | if (NumElts == 16 && !Subtarget.canExtendTo512DQ()) | |||
21268 | return SplitAndExtendv16i1(ISD::ZERO_EXTEND, VT, In, DL, DAG); | |||
21269 | ||||
21270 | ExtVT = MVT::getVectorVT(MVT::i32, NumElts); | |||
21271 | } | |||
21272 | ||||
21273 | // Widen to 512-bits if VLX is not supported. | |||
21274 | MVT WideVT = ExtVT; | |||
21275 | if (!ExtVT.is512BitVector() && !Subtarget.hasVLX()) { | |||
21276 | NumElts *= 512 / ExtVT.getSizeInBits(); | |||
21277 | InVT = MVT::getVectorVT(MVT::i1, NumElts); | |||
21278 | In = DAG.getNode(ISD::INSERT_SUBVECTOR, DL, InVT, DAG.getUNDEF(InVT), | |||
21279 | In, DAG.getIntPtrConstant(0, DL)); | |||
21280 | WideVT = MVT::getVectorVT(ExtVT.getVectorElementType(), | |||
21281 | NumElts); | |||
21282 | } | |||
21283 | ||||
21284 | SDValue One = DAG.getConstant(1, DL, WideVT); | |||
21285 | SDValue Zero = DAG.getConstant(0, DL, WideVT); | |||
21286 | ||||
21287 | SDValue SelectedVal = DAG.getSelect(DL, WideVT, In, One, Zero); | |||
21288 | ||||
21289 | // Truncate if we had to extend above. | |||
21290 | if (VT != ExtVT) { | |||
21291 | WideVT = MVT::getVectorVT(MVT::i8, NumElts); | |||
21292 | SelectedVal = DAG.getNode(ISD::TRUNCATE, DL, WideVT, SelectedVal); | |||
21293 | } | |||
21294 | ||||
21295 | // Extract back to 128/256-bit if we widened. | |||
21296 | if (WideVT != VT) | |||
21297 | SelectedVal = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, VT, SelectedVal, | |||
21298 | DAG.getIntPtrConstant(0, DL)); | |||
21299 | ||||
21300 | return SelectedVal; | |||
21301 | } | |||
21302 | ||||
21303 | static SDValue LowerZERO_EXTEND(SDValue Op, const X86Subtarget &Subtarget, | |||
21304 | SelectionDAG &DAG) { | |||
21305 | SDValue In = Op.getOperand(0); | |||
21306 | MVT SVT = In.getSimpleValueType(); | |||
21307 | ||||
21308 | if (SVT.getVectorElementType() == MVT::i1) | |||
21309 | return LowerZERO_EXTEND_Mask(Op, Subtarget, DAG); | |||
21310 | ||||
21311 | assert(Subtarget.hasAVX() && "Expected AVX support")(static_cast <bool> (Subtarget.hasAVX() && "Expected AVX support" ) ? void (0) : __assert_fail ("Subtarget.hasAVX() && \"Expected AVX support\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21311, __extension__ __PRETTY_FUNCTION__)); | |||
21312 | return LowerAVXExtend(Op, DAG, Subtarget); | |||
21313 | } | |||
21314 | ||||
21315 | /// Helper to recursively truncate vector elements in half with PACKSS/PACKUS. | |||
21316 | /// It makes use of the fact that vectors with enough leading sign/zero bits | |||
21317 | /// prevent the PACKSS/PACKUS from saturating the results. | |||
21318 | /// AVX2 (Int256) sub-targets require extra shuffling as the PACK*S operates | |||
21319 | /// within each 128-bit lane. | |||
21320 | static SDValue truncateVectorWithPACK(unsigned Opcode, EVT DstVT, SDValue In, | |||
21321 | const SDLoc &DL, SelectionDAG &DAG, | |||
21322 | const X86Subtarget &Subtarget) { | |||
21323 | assert((Opcode == X86ISD::PACKSS || Opcode == X86ISD::PACKUS) &&(static_cast <bool> ((Opcode == X86ISD::PACKSS || Opcode == X86ISD::PACKUS) && "Unexpected PACK opcode") ? void (0) : __assert_fail ("(Opcode == X86ISD::PACKSS || Opcode == X86ISD::PACKUS) && \"Unexpected PACK opcode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21324, __extension__ __PRETTY_FUNCTION__)) | |||
21324 | "Unexpected PACK opcode")(static_cast <bool> ((Opcode == X86ISD::PACKSS || Opcode == X86ISD::PACKUS) && "Unexpected PACK opcode") ? void (0) : __assert_fail ("(Opcode == X86ISD::PACKSS || Opcode == X86ISD::PACKUS) && \"Unexpected PACK opcode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21324, __extension__ __PRETTY_FUNCTION__)); | |||
21325 | assert(DstVT.isVector() && "VT not a vector?")(static_cast <bool> (DstVT.isVector() && "VT not a vector?" ) ? void (0) : __assert_fail ("DstVT.isVector() && \"VT not a vector?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21325, __extension__ __PRETTY_FUNCTION__)); | |||
21326 | ||||
21327 | // Requires SSE2 for PACKSS (SSE41 PACKUSDW is handled below). | |||
21328 | if (!Subtarget.hasSSE2()) | |||
21329 | return SDValue(); | |||
21330 | ||||
21331 | EVT SrcVT = In.getValueType(); | |||
21332 | ||||
21333 | // No truncation required, we might get here due to recursive calls. | |||
21334 | if (SrcVT == DstVT) | |||
21335 | return In; | |||
21336 | ||||
21337 | // We only support vector truncation to 64bits or greater from a | |||
21338 | // 128bits or greater source. | |||
21339 | unsigned DstSizeInBits = DstVT.getSizeInBits(); | |||
21340 | unsigned SrcSizeInBits = SrcVT.getSizeInBits(); | |||
21341 | if ((DstSizeInBits % 64) != 0 || (SrcSizeInBits % 128) != 0) | |||
21342 | return SDValue(); | |||
21343 | ||||
21344 | unsigned NumElems = SrcVT.getVectorNumElements(); | |||
21345 | if (!isPowerOf2_32(NumElems)) | |||
21346 | return SDValue(); | |||
21347 | ||||
21348 | LLVMContext &Ctx = *DAG.getContext(); | |||
21349 | assert(DstVT.getVectorNumElements() == NumElems && "Illegal truncation")(static_cast <bool> (DstVT.getVectorNumElements() == NumElems && "Illegal truncation") ? void (0) : __assert_fail ( "DstVT.getVectorNumElements() == NumElems && \"Illegal truncation\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21349, __extension__ __PRETTY_FUNCTION__)); | |||
21350 | assert(SrcSizeInBits > DstSizeInBits && "Illegal truncation")(static_cast <bool> (SrcSizeInBits > DstSizeInBits && "Illegal truncation") ? void (0) : __assert_fail ("SrcSizeInBits > DstSizeInBits && \"Illegal truncation\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21350, __extension__ __PRETTY_FUNCTION__)); | |||
21351 | ||||
21352 | EVT PackedSVT = EVT::getIntegerVT(Ctx, SrcVT.getScalarSizeInBits() / 2); | |||
21353 | ||||
21354 | // Pack to the largest type possible: | |||
21355 | // vXi64/vXi32 -> PACK*SDW and vXi16 -> PACK*SWB. | |||
21356 | EVT InVT = MVT::i16, OutVT = MVT::i8; | |||
21357 | if (SrcVT.getScalarSizeInBits() > 16 && | |||
21358 | (Opcode == X86ISD::PACKSS || Subtarget.hasSSE41())) { | |||
21359 | InVT = MVT::i32; | |||
21360 | OutVT = MVT::i16; | |||
21361 | } | |||
21362 | ||||
21363 | // 128bit -> 64bit truncate - PACK 128-bit src in the lower subvector. | |||
21364 | if (SrcVT.is128BitVector()) { | |||
21365 | InVT = EVT::getVectorVT(Ctx, InVT, 128 / InVT.getSizeInBits()); | |||
21366 | OutVT = EVT::getVectorVT(Ctx, OutVT, 128 / OutVT.getSizeInBits()); | |||
21367 | In = DAG.getBitcast(InVT, In); | |||
21368 | SDValue Res = DAG.getNode(Opcode, DL, OutVT, In, DAG.getUNDEF(InVT)); | |||
21369 | Res = extractSubVector(Res, 0, DAG, DL, 64); | |||
21370 | return DAG.getBitcast(DstVT, Res); | |||
21371 | } | |||
21372 | ||||
21373 | // Split lower/upper subvectors. | |||
21374 | SDValue Lo, Hi; | |||
21375 | std::tie(Lo, Hi) = splitVector(In, DAG, DL); | |||
21376 | ||||
21377 | unsigned SubSizeInBits = SrcSizeInBits / 2; | |||
21378 | InVT = EVT::getVectorVT(Ctx, InVT, SubSizeInBits / InVT.getSizeInBits()); | |||
21379 | OutVT = EVT::getVectorVT(Ctx, OutVT, SubSizeInBits / OutVT.getSizeInBits()); | |||
21380 | ||||
21381 | // 256bit -> 128bit truncate - PACK lower/upper 128-bit subvectors. | |||
21382 | if (SrcVT.is256BitVector() && DstVT.is128BitVector()) { | |||
21383 | Lo = DAG.getBitcast(InVT, Lo); | |||
21384 | Hi = DAG.getBitcast(InVT, Hi); | |||
21385 | SDValue Res = DAG.getNode(Opcode, DL, OutVT, Lo, Hi); | |||
21386 | return DAG.getBitcast(DstVT, Res); | |||
21387 | } | |||
21388 | ||||
21389 | // AVX2: 512bit -> 256bit truncate - PACK lower/upper 256-bit subvectors. | |||
21390 | // AVX2: 512bit -> 128bit truncate - PACK(PACK, PACK). | |||
21391 | if (SrcVT.is512BitVector() && Subtarget.hasInt256()) { | |||
21392 | Lo = DAG.getBitcast(InVT, Lo); | |||
21393 | Hi = DAG.getBitcast(InVT, Hi); | |||
21394 | SDValue Res = DAG.getNode(Opcode, DL, OutVT, Lo, Hi); | |||
21395 | ||||
21396 | // 256-bit PACK(ARG0, ARG1) leaves us with ((LO0,LO1),(HI0,HI1)), | |||
21397 | // so we need to shuffle to get ((LO0,HI0),(LO1,HI1)). | |||
21398 | // Scale shuffle mask to avoid bitcasts and help ComputeNumSignBits. | |||
21399 | SmallVector<int, 64> Mask; | |||
21400 | int Scale = 64 / OutVT.getScalarSizeInBits(); | |||
21401 | narrowShuffleMaskElts(Scale, { 0, 2, 1, 3 }, Mask); | |||
21402 | Res = DAG.getVectorShuffle(OutVT, DL, Res, Res, Mask); | |||
21403 | ||||
21404 | if (DstVT.is256BitVector()) | |||
21405 | return DAG.getBitcast(DstVT, Res); | |||
21406 | ||||
21407 | // If 512bit -> 128bit truncate another stage. | |||
21408 | EVT PackedVT = EVT::getVectorVT(Ctx, PackedSVT, NumElems); | |||
21409 | Res = DAG.getBitcast(PackedVT, Res); | |||
21410 | return truncateVectorWithPACK(Opcode, DstVT, Res, DL, DAG, Subtarget); | |||
21411 | } | |||
21412 | ||||
21413 | // Recursively pack lower/upper subvectors, concat result and pack again. | |||
21414 | assert(SrcSizeInBits >= 256 && "Expected 256-bit vector or greater")(static_cast <bool> (SrcSizeInBits >= 256 && "Expected 256-bit vector or greater") ? void (0) : __assert_fail ("SrcSizeInBits >= 256 && \"Expected 256-bit vector or greater\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21414, __extension__ __PRETTY_FUNCTION__)); | |||
21415 | EVT PackedVT = EVT::getVectorVT(Ctx, PackedSVT, NumElems / 2); | |||
21416 | Lo = truncateVectorWithPACK(Opcode, PackedVT, Lo, DL, DAG, Subtarget); | |||
21417 | Hi = truncateVectorWithPACK(Opcode, PackedVT, Hi, DL, DAG, Subtarget); | |||
21418 | ||||
21419 | PackedVT = EVT::getVectorVT(Ctx, PackedSVT, NumElems); | |||
21420 | SDValue Res = DAG.getNode(ISD::CONCAT_VECTORS, DL, PackedVT, Lo, Hi); | |||
21421 | return truncateVectorWithPACK(Opcode, DstVT, Res, DL, DAG, Subtarget); | |||
21422 | } | |||
21423 | ||||
21424 | static SDValue LowerTruncateVecI1(SDValue Op, SelectionDAG &DAG, | |||
21425 | const X86Subtarget &Subtarget) { | |||
21426 | ||||
21427 | SDLoc DL(Op); | |||
21428 | MVT VT = Op.getSimpleValueType(); | |||
21429 | SDValue In = Op.getOperand(0); | |||
21430 | MVT InVT = In.getSimpleValueType(); | |||
21431 | ||||
21432 | assert(VT.getVectorElementType() == MVT::i1 && "Unexpected vector type.")(static_cast <bool> (VT.getVectorElementType() == MVT:: i1 && "Unexpected vector type.") ? void (0) : __assert_fail ("VT.getVectorElementType() == MVT::i1 && \"Unexpected vector type.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21432, __extension__ __PRETTY_FUNCTION__)); | |||
21433 | ||||
21434 | // Shift LSB to MSB and use VPMOVB/W2M or TESTD/Q. | |||
21435 | unsigned ShiftInx = InVT.getScalarSizeInBits() - 1; | |||
21436 | if (InVT.getScalarSizeInBits() <= 16) { | |||
21437 | if (Subtarget.hasBWI()) { | |||
21438 | // legal, will go to VPMOVB2M, VPMOVW2M | |||
21439 | if (DAG.ComputeNumSignBits(In) < InVT.getScalarSizeInBits()) { | |||
21440 | // We need to shift to get the lsb into sign position. | |||
21441 | // Shift packed bytes not supported natively, bitcast to word | |||
21442 | MVT ExtVT = MVT::getVectorVT(MVT::i16, InVT.getSizeInBits()/16); | |||
21443 | In = DAG.getNode(ISD::SHL, DL, ExtVT, | |||
21444 | DAG.getBitcast(ExtVT, In), | |||
21445 | DAG.getConstant(ShiftInx, DL, ExtVT)); | |||
21446 | In = DAG.getBitcast(InVT, In); | |||
21447 | } | |||
21448 | return DAG.getSetCC(DL, VT, DAG.getConstant(0, DL, InVT), | |||
21449 | In, ISD::SETGT); | |||
21450 | } | |||
21451 | // Use TESTD/Q, extended vector to packed dword/qword. | |||
21452 | assert((InVT.is256BitVector() || InVT.is128BitVector()) &&(static_cast <bool> ((InVT.is256BitVector() || InVT.is128BitVector ()) && "Unexpected vector type.") ? void (0) : __assert_fail ("(InVT.is256BitVector() || InVT.is128BitVector()) && \"Unexpected vector type.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21453, __extension__ __PRETTY_FUNCTION__)) | |||
21453 | "Unexpected vector type.")(static_cast <bool> ((InVT.is256BitVector() || InVT.is128BitVector ()) && "Unexpected vector type.") ? void (0) : __assert_fail ("(InVT.is256BitVector() || InVT.is128BitVector()) && \"Unexpected vector type.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21453, __extension__ __PRETTY_FUNCTION__)); | |||
21454 | unsigned NumElts = InVT.getVectorNumElements(); | |||
21455 | assert((NumElts == 8 || NumElts == 16) && "Unexpected number of elements")(static_cast <bool> ((NumElts == 8 || NumElts == 16) && "Unexpected number of elements") ? void (0) : __assert_fail ( "(NumElts == 8 || NumElts == 16) && \"Unexpected number of elements\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21455, __extension__ __PRETTY_FUNCTION__)); | |||
21456 | // We need to change to a wider element type that we have support for. | |||
21457 | // For 8 element vectors this is easy, we either extend to v8i32 or v8i64. | |||
21458 | // For 16 element vectors we extend to v16i32 unless we are explicitly | |||
21459 | // trying to avoid 512-bit vectors. If we are avoiding 512-bit vectors | |||
21460 | // we need to split into two 8 element vectors which we can extend to v8i32, | |||
21461 | // truncate and concat the results. There's an additional complication if | |||
21462 | // the original type is v16i8. In that case we can't split the v16i8 | |||
21463 | // directly, so we need to shuffle high elements to low and use | |||
21464 | // sign_extend_vector_inreg. | |||
21465 | if (NumElts == 16 && !Subtarget.canExtendTo512DQ()) { | |||
21466 | SDValue Lo, Hi; | |||
21467 | if (InVT == MVT::v16i8) { | |||
21468 | Lo = DAG.getNode(ISD::SIGN_EXTEND_VECTOR_INREG, DL, MVT::v8i32, In); | |||
21469 | Hi = DAG.getVectorShuffle( | |||
21470 | InVT, DL, In, In, | |||
21471 | {8, 9, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1}); | |||
21472 | Hi = DAG.getNode(ISD::SIGN_EXTEND_VECTOR_INREG, DL, MVT::v8i32, Hi); | |||
21473 | } else { | |||
21474 | assert(InVT == MVT::v16i16 && "Unexpected VT!")(static_cast <bool> (InVT == MVT::v16i16 && "Unexpected VT!" ) ? void (0) : __assert_fail ("InVT == MVT::v16i16 && \"Unexpected VT!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21474, __extension__ __PRETTY_FUNCTION__)); | |||
21475 | Lo = extract128BitVector(In, 0, DAG, DL); | |||
21476 | Hi = extract128BitVector(In, 8, DAG, DL); | |||
21477 | } | |||
21478 | // We're split now, just emit two truncates and a concat. The two | |||
21479 | // truncates will trigger legalization to come back to this function. | |||
21480 | Lo = DAG.getNode(ISD::TRUNCATE, DL, MVT::v8i1, Lo); | |||
21481 | Hi = DAG.getNode(ISD::TRUNCATE, DL, MVT::v8i1, Hi); | |||
21482 | return DAG.getNode(ISD::CONCAT_VECTORS, DL, VT, Lo, Hi); | |||
21483 | } | |||
21484 | // We either have 8 elements or we're allowed to use 512-bit vectors. | |||
21485 | // If we have VLX, we want to use the narrowest vector that can get the | |||
21486 | // job done so we use vXi32. | |||
21487 | MVT EltVT = Subtarget.hasVLX() ? MVT::i32 : MVT::getIntegerVT(512/NumElts); | |||
21488 | MVT ExtVT = MVT::getVectorVT(EltVT, NumElts); | |||
21489 | In = DAG.getNode(ISD::SIGN_EXTEND, DL, ExtVT, In); | |||
21490 | InVT = ExtVT; | |||
21491 | ShiftInx = InVT.getScalarSizeInBits() - 1; | |||
21492 | } | |||
21493 | ||||
21494 | if (DAG.ComputeNumSignBits(In) < InVT.getScalarSizeInBits()) { | |||
21495 | // We need to shift to get the lsb into sign position. | |||
21496 | In = DAG.getNode(ISD::SHL, DL, InVT, In, | |||
21497 | DAG.getConstant(ShiftInx, DL, InVT)); | |||
21498 | } | |||
21499 | // If we have DQI, emit a pattern that will be iseled as vpmovq2m/vpmovd2m. | |||
21500 | if (Subtarget.hasDQI()) | |||
21501 | return DAG.getSetCC(DL, VT, DAG.getConstant(0, DL, InVT), In, ISD::SETGT); | |||
21502 | return DAG.getSetCC(DL, VT, In, DAG.getConstant(0, DL, InVT), ISD::SETNE); | |||
21503 | } | |||
21504 | ||||
21505 | SDValue X86TargetLowering::LowerTRUNCATE(SDValue Op, SelectionDAG &DAG) const { | |||
21506 | SDLoc DL(Op); | |||
21507 | MVT VT = Op.getSimpleValueType(); | |||
21508 | SDValue In = Op.getOperand(0); | |||
21509 | MVT InVT = In.getSimpleValueType(); | |||
21510 | unsigned InNumEltBits = InVT.getScalarSizeInBits(); | |||
21511 | ||||
21512 | assert(VT.getVectorNumElements() == InVT.getVectorNumElements() &&(static_cast <bool> (VT.getVectorNumElements() == InVT. getVectorNumElements() && "Invalid TRUNCATE operation" ) ? void (0) : __assert_fail ("VT.getVectorNumElements() == InVT.getVectorNumElements() && \"Invalid TRUNCATE operation\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21513, __extension__ __PRETTY_FUNCTION__)) | |||
21513 | "Invalid TRUNCATE operation")(static_cast <bool> (VT.getVectorNumElements() == InVT. getVectorNumElements() && "Invalid TRUNCATE operation" ) ? void (0) : __assert_fail ("VT.getVectorNumElements() == InVT.getVectorNumElements() && \"Invalid TRUNCATE operation\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21513, __extension__ __PRETTY_FUNCTION__)); | |||
21514 | ||||
21515 | // If we're called by the type legalizer, handle a few cases. | |||
21516 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
21517 | if (!TLI.isTypeLegal(InVT)) { | |||
21518 | if ((InVT == MVT::v8i64 || InVT == MVT::v16i32 || InVT == MVT::v16i64) && | |||
21519 | VT.is128BitVector()) { | |||
21520 | assert((InVT == MVT::v16i64 || Subtarget.hasVLX()) &&(static_cast <bool> ((InVT == MVT::v16i64 || Subtarget. hasVLX()) && "Unexpected subtarget!") ? void (0) : __assert_fail ("(InVT == MVT::v16i64 || Subtarget.hasVLX()) && \"Unexpected subtarget!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21521, __extension__ __PRETTY_FUNCTION__)) | |||
21521 | "Unexpected subtarget!")(static_cast <bool> ((InVT == MVT::v16i64 || Subtarget. hasVLX()) && "Unexpected subtarget!") ? void (0) : __assert_fail ("(InVT == MVT::v16i64 || Subtarget.hasVLX()) && \"Unexpected subtarget!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21521, __extension__ __PRETTY_FUNCTION__)); | |||
21522 | // The default behavior is to truncate one step, concatenate, and then | |||
21523 | // truncate the remainder. We'd rather produce two 64-bit results and | |||
21524 | // concatenate those. | |||
21525 | SDValue Lo, Hi; | |||
21526 | std::tie(Lo, Hi) = DAG.SplitVector(In, DL); | |||
21527 | ||||
21528 | EVT LoVT, HiVT; | |||
21529 | std::tie(LoVT, HiVT) = DAG.GetSplitDestVTs(VT); | |||
21530 | ||||
21531 | Lo = DAG.getNode(ISD::TRUNCATE, DL, LoVT, Lo); | |||
21532 | Hi = DAG.getNode(ISD::TRUNCATE, DL, HiVT, Hi); | |||
21533 | return DAG.getNode(ISD::CONCAT_VECTORS, DL, VT, Lo, Hi); | |||
21534 | } | |||
21535 | ||||
21536 | // Otherwise let default legalization handle it. | |||
21537 | return SDValue(); | |||
21538 | } | |||
21539 | ||||
21540 | if (VT.getVectorElementType() == MVT::i1) | |||
21541 | return LowerTruncateVecI1(Op, DAG, Subtarget); | |||
21542 | ||||
21543 | // vpmovqb/w/d, vpmovdb/w, vpmovwb | |||
21544 | if (Subtarget.hasAVX512()) { | |||
21545 | if (InVT == MVT::v32i16 && !Subtarget.hasBWI()) { | |||
21546 | assert(VT == MVT::v32i8 && "Unexpected VT!")(static_cast <bool> (VT == MVT::v32i8 && "Unexpected VT!" ) ? void (0) : __assert_fail ("VT == MVT::v32i8 && \"Unexpected VT!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21546, __extension__ __PRETTY_FUNCTION__)); | |||
21547 | return splitVectorIntUnary(Op, DAG); | |||
21548 | } | |||
21549 | ||||
21550 | // word to byte only under BWI. Otherwise we have to promoted to v16i32 | |||
21551 | // and then truncate that. But we should only do that if we haven't been | |||
21552 | // asked to avoid 512-bit vectors. The actual promotion to v16i32 will be | |||
21553 | // handled by isel patterns. | |||
21554 | if (InVT != MVT::v16i16 || Subtarget.hasBWI() || | |||
21555 | Subtarget.canExtendTo512DQ()) | |||
21556 | return Op; | |||
21557 | } | |||
21558 | ||||
21559 | unsigned NumPackedSignBits = std::min<unsigned>(VT.getScalarSizeInBits(), 16); | |||
21560 | unsigned NumPackedZeroBits = Subtarget.hasSSE41() ? NumPackedSignBits : 8; | |||
21561 | ||||
21562 | // Truncate with PACKUS if we are truncating a vector with leading zero bits | |||
21563 | // that extend all the way to the packed/truncated value. | |||
21564 | // Pre-SSE41 we can only use PACKUSWB. | |||
21565 | KnownBits Known = DAG.computeKnownBits(In); | |||
21566 | if ((InNumEltBits - NumPackedZeroBits) <= Known.countMinLeadingZeros()) | |||
21567 | if (SDValue V = | |||
21568 | truncateVectorWithPACK(X86ISD::PACKUS, VT, In, DL, DAG, Subtarget)) | |||
21569 | return V; | |||
21570 | ||||
21571 | // Truncate with PACKSS if we are truncating a vector with sign-bits that | |||
21572 | // extend all the way to the packed/truncated value. | |||
21573 | if ((InNumEltBits - NumPackedSignBits) < DAG.ComputeNumSignBits(In)) | |||
21574 | if (SDValue V = | |||
21575 | truncateVectorWithPACK(X86ISD::PACKSS, VT, In, DL, DAG, Subtarget)) | |||
21576 | return V; | |||
21577 | ||||
21578 | // Handle truncation of V256 to V128 using shuffles. | |||
21579 | assert(VT.is128BitVector() && InVT.is256BitVector() && "Unexpected types!")(static_cast <bool> (VT.is128BitVector() && InVT .is256BitVector() && "Unexpected types!") ? void (0) : __assert_fail ("VT.is128BitVector() && InVT.is256BitVector() && \"Unexpected types!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21579, __extension__ __PRETTY_FUNCTION__)); | |||
21580 | ||||
21581 | if ((VT == MVT::v4i32) && (InVT == MVT::v4i64)) { | |||
21582 | In = DAG.getBitcast(MVT::v8i32, In); | |||
21583 | ||||
21584 | // On AVX2, v4i64 -> v4i32 becomes VPERMD. | |||
21585 | if (Subtarget.hasInt256()) { | |||
21586 | static const int ShufMask[] = {0, 2, 4, 6, -1, -1, -1, -1}; | |||
21587 | In = DAG.getVectorShuffle(MVT::v8i32, DL, In, In, ShufMask); | |||
21588 | return DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, VT, In, | |||
21589 | DAG.getIntPtrConstant(0, DL)); | |||
21590 | } | |||
21591 | ||||
21592 | SDValue OpLo = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, MVT::v4i32, In, | |||
21593 | DAG.getIntPtrConstant(0, DL)); | |||
21594 | SDValue OpHi = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, MVT::v4i32, In, | |||
21595 | DAG.getIntPtrConstant(4, DL)); | |||
21596 | static const int ShufMask[] = {0, 2, 4, 6}; | |||
21597 | return DAG.getVectorShuffle(VT, DL, OpLo, OpHi, ShufMask); | |||
21598 | } | |||
21599 | ||||
21600 | if ((VT == MVT::v8i16) && (InVT == MVT::v8i32)) { | |||
21601 | In = DAG.getBitcast(MVT::v32i8, In); | |||
21602 | ||||
21603 | // On AVX2, v8i32 -> v8i16 becomes PSHUFB. | |||
21604 | if (Subtarget.hasInt256()) { | |||
21605 | // The PSHUFB mask: | |||
21606 | static const int ShufMask1[] = { 0, 1, 4, 5, 8, 9, 12, 13, | |||
21607 | -1, -1, -1, -1, -1, -1, -1, -1, | |||
21608 | 16, 17, 20, 21, 24, 25, 28, 29, | |||
21609 | -1, -1, -1, -1, -1, -1, -1, -1 }; | |||
21610 | In = DAG.getVectorShuffle(MVT::v32i8, DL, In, In, ShufMask1); | |||
21611 | In = DAG.getBitcast(MVT::v4i64, In); | |||
21612 | ||||
21613 | static const int ShufMask2[] = {0, 2, -1, -1}; | |||
21614 | In = DAG.getVectorShuffle(MVT::v4i64, DL, In, In, ShufMask2); | |||
21615 | return DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, MVT::v8i16, | |||
21616 | DAG.getBitcast(MVT::v16i16, In), | |||
21617 | DAG.getIntPtrConstant(0, DL)); | |||
21618 | } | |||
21619 | ||||
21620 | SDValue OpLo = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, MVT::v16i8, In, | |||
21621 | DAG.getIntPtrConstant(0, DL)); | |||
21622 | SDValue OpHi = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, MVT::v16i8, In, | |||
21623 | DAG.getIntPtrConstant(16, DL)); | |||
21624 | ||||
21625 | // The PSHUFB mask: | |||
21626 | static const int ShufMask1[] = {0, 1, 4, 5, 8, 9, 12, 13, | |||
21627 | -1, -1, -1, -1, -1, -1, -1, -1}; | |||
21628 | ||||
21629 | OpLo = DAG.getVectorShuffle(MVT::v16i8, DL, OpLo, OpLo, ShufMask1); | |||
21630 | OpHi = DAG.getVectorShuffle(MVT::v16i8, DL, OpHi, OpHi, ShufMask1); | |||
21631 | ||||
21632 | OpLo = DAG.getBitcast(MVT::v4i32, OpLo); | |||
21633 | OpHi = DAG.getBitcast(MVT::v4i32, OpHi); | |||
21634 | ||||
21635 | // The MOVLHPS Mask: | |||
21636 | static const int ShufMask2[] = {0, 1, 4, 5}; | |||
21637 | SDValue res = DAG.getVectorShuffle(MVT::v4i32, DL, OpLo, OpHi, ShufMask2); | |||
21638 | return DAG.getBitcast(MVT::v8i16, res); | |||
21639 | } | |||
21640 | ||||
21641 | if (VT == MVT::v16i8 && InVT == MVT::v16i16) { | |||
21642 | // Use an AND to zero uppper bits for PACKUS. | |||
21643 | In = DAG.getNode(ISD::AND, DL, InVT, In, DAG.getConstant(255, DL, InVT)); | |||
21644 | ||||
21645 | SDValue InLo = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, MVT::v8i16, In, | |||
21646 | DAG.getIntPtrConstant(0, DL)); | |||
21647 | SDValue InHi = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, MVT::v8i16, In, | |||
21648 | DAG.getIntPtrConstant(8, DL)); | |||
21649 | return DAG.getNode(X86ISD::PACKUS, DL, VT, InLo, InHi); | |||
21650 | } | |||
21651 | ||||
21652 | llvm_unreachable("All 256->128 cases should have been handled above!")::llvm::llvm_unreachable_internal("All 256->128 cases should have been handled above!" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21652); | |||
21653 | } | |||
21654 | ||||
21655 | // We can leverage the specific way the "cvttps2dq/cvttpd2dq" instruction | |||
21656 | // behaves on out of range inputs to generate optimized conversions. | |||
21657 | static SDValue expandFP_TO_UINT_SSE(MVT VT, SDValue Src, const SDLoc &dl, | |||
21658 | SelectionDAG &DAG, | |||
21659 | const X86Subtarget &Subtarget) { | |||
21660 | MVT SrcVT = Src.getSimpleValueType(); | |||
21661 | unsigned DstBits = VT.getScalarSizeInBits(); | |||
21662 | assert(DstBits == 32 && "expandFP_TO_UINT_SSE - only vXi32 supported")(static_cast <bool> (DstBits == 32 && "expandFP_TO_UINT_SSE - only vXi32 supported" ) ? void (0) : __assert_fail ("DstBits == 32 && \"expandFP_TO_UINT_SSE - only vXi32 supported\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21662, __extension__ __PRETTY_FUNCTION__)); | |||
21663 | ||||
21664 | // Calculate the converted result for values in the range 0 to | |||
21665 | // 2^31-1 ("Small") and from 2^31 to 2^32-1 ("Big"). | |||
21666 | SDValue Small = DAG.getNode(X86ISD::CVTTP2SI, dl, VT, Src); | |||
21667 | SDValue Big = | |||
21668 | DAG.getNode(X86ISD::CVTTP2SI, dl, VT, | |||
21669 | DAG.getNode(ISD::FSUB, dl, SrcVT, Src, | |||
21670 | DAG.getConstantFP(2147483648.0f, dl, SrcVT))); | |||
21671 | ||||
21672 | // The "CVTTP2SI" instruction conveniently sets the sign bit if | |||
21673 | // and only if the value was out of range. So we can use that | |||
21674 | // as our indicator that we rather use "Big" instead of "Small". | |||
21675 | // | |||
21676 | // Use "Small" if "IsOverflown" has all bits cleared | |||
21677 | // and "0x80000000 | Big" if all bits in "IsOverflown" are set. | |||
21678 | ||||
21679 | // AVX1 can't use the signsplat masking for 256-bit vectors - we have to | |||
21680 | // use the slightly slower blendv select instead. | |||
21681 | if (VT == MVT::v8i32 && !Subtarget.hasAVX2()) { | |||
21682 | SDValue Overflow = DAG.getNode(ISD::OR, dl, VT, Small, Big); | |||
21683 | return DAG.getNode(X86ISD::BLENDV, dl, VT, Small, Overflow, Small); | |||
21684 | } | |||
21685 | ||||
21686 | SDValue IsOverflown = | |||
21687 | DAG.getNode(X86ISD::VSRAI, dl, VT, Small, | |||
21688 | DAG.getTargetConstant(DstBits - 1, dl, MVT::i8)); | |||
21689 | return DAG.getNode(ISD::OR, dl, VT, Small, | |||
21690 | DAG.getNode(ISD::AND, dl, VT, Big, IsOverflown)); | |||
21691 | } | |||
21692 | ||||
21693 | SDValue X86TargetLowering::LowerFP_TO_INT(SDValue Op, SelectionDAG &DAG) const { | |||
21694 | bool IsStrict = Op->isStrictFPOpcode(); | |||
21695 | bool IsSigned = Op.getOpcode() == ISD::FP_TO_SINT || | |||
21696 | Op.getOpcode() == ISD::STRICT_FP_TO_SINT; | |||
21697 | MVT VT = Op->getSimpleValueType(0); | |||
21698 | SDValue Src = Op.getOperand(IsStrict ? 1 : 0); | |||
21699 | SDValue Chain = IsStrict ? Op->getOperand(0) : SDValue(); | |||
21700 | MVT SrcVT = Src.getSimpleValueType(); | |||
21701 | SDLoc dl(Op); | |||
21702 | ||||
21703 | SDValue Res; | |||
21704 | if (VT.isVector()) { | |||
21705 | if (VT == MVT::v2i1 && SrcVT == MVT::v2f64) { | |||
21706 | MVT ResVT = MVT::v4i32; | |||
21707 | MVT TruncVT = MVT::v4i1; | |||
21708 | unsigned Opc; | |||
21709 | if (IsStrict) | |||
21710 | Opc = IsSigned ? X86ISD::STRICT_CVTTP2SI : X86ISD::STRICT_CVTTP2UI; | |||
21711 | else | |||
21712 | Opc = IsSigned ? X86ISD::CVTTP2SI : X86ISD::CVTTP2UI; | |||
21713 | ||||
21714 | if (!IsSigned && !Subtarget.hasVLX()) { | |||
21715 | assert(Subtarget.useAVX512Regs() && "Unexpected features!")(static_cast <bool> (Subtarget.useAVX512Regs() && "Unexpected features!") ? void (0) : __assert_fail ("Subtarget.useAVX512Regs() && \"Unexpected features!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21715, __extension__ __PRETTY_FUNCTION__)); | |||
21716 | // Widen to 512-bits. | |||
21717 | ResVT = MVT::v8i32; | |||
21718 | TruncVT = MVT::v8i1; | |||
21719 | Opc = Op.getOpcode(); | |||
21720 | // Need to concat with zero vector for strict fp to avoid spurious | |||
21721 | // exceptions. | |||
21722 | // TODO: Should we just do this for non-strict as well? | |||
21723 | SDValue Tmp = IsStrict ? DAG.getConstantFP(0.0, dl, MVT::v8f64) | |||
21724 | : DAG.getUNDEF(MVT::v8f64); | |||
21725 | Src = DAG.getNode(ISD::INSERT_SUBVECTOR, dl, MVT::v8f64, Tmp, Src, | |||
21726 | DAG.getIntPtrConstant(0, dl)); | |||
21727 | } | |||
21728 | if (IsStrict) { | |||
21729 | Res = DAG.getNode(Opc, dl, {ResVT, MVT::Other}, {Chain, Src}); | |||
21730 | Chain = Res.getValue(1); | |||
21731 | } else { | |||
21732 | Res = DAG.getNode(Opc, dl, ResVT, Src); | |||
21733 | } | |||
21734 | ||||
21735 | Res = DAG.getNode(ISD::TRUNCATE, dl, TruncVT, Res); | |||
21736 | Res = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v2i1, Res, | |||
21737 | DAG.getIntPtrConstant(0, dl)); | |||
21738 | if (IsStrict) | |||
21739 | return DAG.getMergeValues({Res, Chain}, dl); | |||
21740 | return Res; | |||
21741 | } | |||
21742 | ||||
21743 | if (Subtarget.hasFP16() && SrcVT.getVectorElementType() == MVT::f16) { | |||
21744 | if (VT == MVT::v8i16 || VT == MVT::v16i16 || VT == MVT::v32i16) | |||
21745 | return Op; | |||
21746 | ||||
21747 | MVT ResVT = VT; | |||
21748 | MVT EleVT = VT.getVectorElementType(); | |||
21749 | if (EleVT != MVT::i64) | |||
21750 | ResVT = EleVT == MVT::i32 ? MVT::v4i32 : MVT::v8i16; | |||
21751 | ||||
21752 | if (SrcVT != MVT::v8f16) { | |||
21753 | SDValue Tmp = | |||
21754 | IsStrict ? DAG.getConstantFP(0.0, dl, SrcVT) : DAG.getUNDEF(SrcVT); | |||
21755 | SmallVector<SDValue, 4> Ops(SrcVT == MVT::v2f16 ? 4 : 2, Tmp); | |||
21756 | Ops[0] = Src; | |||
21757 | Src = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v8f16, Ops); | |||
21758 | } | |||
21759 | ||||
21760 | if (IsStrict) { | |||
21761 | Res = DAG.getNode(IsSigned ? X86ISD::STRICT_CVTTP2SI | |||
21762 | : X86ISD::STRICT_CVTTP2UI, | |||
21763 | dl, {ResVT, MVT::Other}, {Chain, Src}); | |||
21764 | Chain = Res.getValue(1); | |||
21765 | } else { | |||
21766 | Res = DAG.getNode(IsSigned ? X86ISD::CVTTP2SI : X86ISD::CVTTP2UI, dl, | |||
21767 | ResVT, Src); | |||
21768 | } | |||
21769 | ||||
21770 | // TODO: Need to add exception check code for strict FP. | |||
21771 | if (EleVT.getSizeInBits() < 16) { | |||
21772 | ResVT = MVT::getVectorVT(EleVT, 8); | |||
21773 | Res = DAG.getNode(ISD::TRUNCATE, dl, ResVT, Res); | |||
21774 | } | |||
21775 | ||||
21776 | if (ResVT != VT) | |||
21777 | Res = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT, Res, | |||
21778 | DAG.getIntPtrConstant(0, dl)); | |||
21779 | ||||
21780 | if (IsStrict) | |||
21781 | return DAG.getMergeValues({Res, Chain}, dl); | |||
21782 | return Res; | |||
21783 | } | |||
21784 | ||||
21785 | if (VT == MVT::v8i16 && (SrcVT == MVT::v8f32 || SrcVT == MVT::v8f64)) { | |||
21786 | if (IsStrict) { | |||
21787 | Res = DAG.getNode(IsSigned ? ISD::STRICT_FP_TO_SINT | |||
21788 | : ISD::STRICT_FP_TO_UINT, | |||
21789 | dl, {MVT::v8i32, MVT::Other}, {Chain, Src}); | |||
21790 | Chain = Res.getValue(1); | |||
21791 | } else { | |||
21792 | Res = DAG.getNode(IsSigned ? ISD::FP_TO_SINT : ISD::FP_TO_UINT, dl, | |||
21793 | MVT::v8i32, Src); | |||
21794 | } | |||
21795 | ||||
21796 | // TODO: Need to add exception check code for strict FP. | |||
21797 | Res = DAG.getNode(ISD::TRUNCATE, dl, MVT::v8i16, Res); | |||
21798 | ||||
21799 | if (IsStrict) | |||
21800 | return DAG.getMergeValues({Res, Chain}, dl); | |||
21801 | return Res; | |||
21802 | } | |||
21803 | ||||
21804 | // v8f64->v8i32 is legal, but we need v8i32 to be custom for v8f32. | |||
21805 | if (VT == MVT::v8i32 && SrcVT == MVT::v8f64) { | |||
21806 | assert(!IsSigned && "Expected unsigned conversion!")(static_cast <bool> (!IsSigned && "Expected unsigned conversion!" ) ? void (0) : __assert_fail ("!IsSigned && \"Expected unsigned conversion!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21806, __extension__ __PRETTY_FUNCTION__)); | |||
21807 | assert(Subtarget.useAVX512Regs() && "Requires avx512f")(static_cast <bool> (Subtarget.useAVX512Regs() && "Requires avx512f") ? void (0) : __assert_fail ("Subtarget.useAVX512Regs() && \"Requires avx512f\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21807, __extension__ __PRETTY_FUNCTION__)); | |||
21808 | return Op; | |||
21809 | } | |||
21810 | ||||
21811 | // Widen vXi32 fp_to_uint with avx512f to 512-bit source. | |||
21812 | if ((VT == MVT::v4i32 || VT == MVT::v8i32) && | |||
21813 | (SrcVT == MVT::v4f64 || SrcVT == MVT::v4f32 || SrcVT == MVT::v8f32) && | |||
21814 | Subtarget.useAVX512Regs()) { | |||
21815 | assert(!IsSigned && "Expected unsigned conversion!")(static_cast <bool> (!IsSigned && "Expected unsigned conversion!" ) ? void (0) : __assert_fail ("!IsSigned && \"Expected unsigned conversion!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21815, __extension__ __PRETTY_FUNCTION__)); | |||
21816 | assert(!Subtarget.hasVLX() && "Unexpected features!")(static_cast <bool> (!Subtarget.hasVLX() && "Unexpected features!" ) ? void (0) : __assert_fail ("!Subtarget.hasVLX() && \"Unexpected features!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21816, __extension__ __PRETTY_FUNCTION__)); | |||
21817 | MVT WideVT = SrcVT == MVT::v4f64 ? MVT::v8f64 : MVT::v16f32; | |||
21818 | MVT ResVT = SrcVT == MVT::v4f64 ? MVT::v8i32 : MVT::v16i32; | |||
21819 | // Need to concat with zero vector for strict fp to avoid spurious | |||
21820 | // exceptions. | |||
21821 | // TODO: Should we just do this for non-strict as well? | |||
21822 | SDValue Tmp = | |||
21823 | IsStrict ? DAG.getConstantFP(0.0, dl, WideVT) : DAG.getUNDEF(WideVT); | |||
21824 | Src = DAG.getNode(ISD::INSERT_SUBVECTOR, dl, WideVT, Tmp, Src, | |||
21825 | DAG.getIntPtrConstant(0, dl)); | |||
21826 | ||||
21827 | if (IsStrict) { | |||
21828 | Res = DAG.getNode(ISD::STRICT_FP_TO_UINT, dl, {ResVT, MVT::Other}, | |||
21829 | {Chain, Src}); | |||
21830 | Chain = Res.getValue(1); | |||
21831 | } else { | |||
21832 | Res = DAG.getNode(ISD::FP_TO_UINT, dl, ResVT, Src); | |||
21833 | } | |||
21834 | ||||
21835 | Res = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT, Res, | |||
21836 | DAG.getIntPtrConstant(0, dl)); | |||
21837 | ||||
21838 | if (IsStrict) | |||
21839 | return DAG.getMergeValues({Res, Chain}, dl); | |||
21840 | return Res; | |||
21841 | } | |||
21842 | ||||
21843 | // Widen vXi64 fp_to_uint/fp_to_sint with avx512dq to 512-bit source. | |||
21844 | if ((VT == MVT::v2i64 || VT == MVT::v4i64) && | |||
21845 | (SrcVT == MVT::v2f64 || SrcVT == MVT::v4f64 || SrcVT == MVT::v4f32) && | |||
21846 | Subtarget.useAVX512Regs() && Subtarget.hasDQI()) { | |||
21847 | assert(!Subtarget.hasVLX() && "Unexpected features!")(static_cast <bool> (!Subtarget.hasVLX() && "Unexpected features!" ) ? void (0) : __assert_fail ("!Subtarget.hasVLX() && \"Unexpected features!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21847, __extension__ __PRETTY_FUNCTION__)); | |||
21848 | MVT WideVT = SrcVT == MVT::v4f32 ? MVT::v8f32 : MVT::v8f64; | |||
21849 | // Need to concat with zero vector for strict fp to avoid spurious | |||
21850 | // exceptions. | |||
21851 | // TODO: Should we just do this for non-strict as well? | |||
21852 | SDValue Tmp = | |||
21853 | IsStrict ? DAG.getConstantFP(0.0, dl, WideVT) : DAG.getUNDEF(WideVT); | |||
21854 | Src = DAG.getNode(ISD::INSERT_SUBVECTOR, dl, WideVT, Tmp, Src, | |||
21855 | DAG.getIntPtrConstant(0, dl)); | |||
21856 | ||||
21857 | if (IsStrict) { | |||
21858 | Res = DAG.getNode(Op.getOpcode(), dl, {MVT::v8i64, MVT::Other}, | |||
21859 | {Chain, Src}); | |||
21860 | Chain = Res.getValue(1); | |||
21861 | } else { | |||
21862 | Res = DAG.getNode(Op.getOpcode(), dl, MVT::v8i64, Src); | |||
21863 | } | |||
21864 | ||||
21865 | Res = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT, Res, | |||
21866 | DAG.getIntPtrConstant(0, dl)); | |||
21867 | ||||
21868 | if (IsStrict) | |||
21869 | return DAG.getMergeValues({Res, Chain}, dl); | |||
21870 | return Res; | |||
21871 | } | |||
21872 | ||||
21873 | if (VT == MVT::v2i64 && SrcVT == MVT::v2f32) { | |||
21874 | if (!Subtarget.hasVLX()) { | |||
21875 | // Non-strict nodes without VLX can we widened to v4f32->v4i64 by type | |||
21876 | // legalizer and then widened again by vector op legalization. | |||
21877 | if (!IsStrict) | |||
21878 | return SDValue(); | |||
21879 | ||||
21880 | SDValue Zero = DAG.getConstantFP(0.0, dl, MVT::v2f32); | |||
21881 | SDValue Tmp = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v8f32, | |||
21882 | {Src, Zero, Zero, Zero}); | |||
21883 | Tmp = DAG.getNode(Op.getOpcode(), dl, {MVT::v8i64, MVT::Other}, | |||
21884 | {Chain, Tmp}); | |||
21885 | SDValue Chain = Tmp.getValue(1); | |||
21886 | Tmp = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v2i64, Tmp, | |||
21887 | DAG.getIntPtrConstant(0, dl)); | |||
21888 | return DAG.getMergeValues({Tmp, Chain}, dl); | |||
21889 | } | |||
21890 | ||||
21891 | assert(Subtarget.hasDQI() && Subtarget.hasVLX() && "Requires AVX512DQVL")(static_cast <bool> (Subtarget.hasDQI() && Subtarget .hasVLX() && "Requires AVX512DQVL") ? void (0) : __assert_fail ("Subtarget.hasDQI() && Subtarget.hasVLX() && \"Requires AVX512DQVL\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21891, __extension__ __PRETTY_FUNCTION__)); | |||
21892 | SDValue Tmp = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v4f32, Src, | |||
21893 | DAG.getUNDEF(MVT::v2f32)); | |||
21894 | if (IsStrict) { | |||
21895 | unsigned Opc = IsSigned ? X86ISD::STRICT_CVTTP2SI | |||
21896 | : X86ISD::STRICT_CVTTP2UI; | |||
21897 | return DAG.getNode(Opc, dl, {VT, MVT::Other}, {Op->getOperand(0), Tmp}); | |||
21898 | } | |||
21899 | unsigned Opc = IsSigned ? X86ISD::CVTTP2SI : X86ISD::CVTTP2UI; | |||
21900 | return DAG.getNode(Opc, dl, VT, Tmp); | |||
21901 | } | |||
21902 | ||||
21903 | // Generate optimized instructions for pre AVX512 unsigned conversions from | |||
21904 | // vXf32 to vXi32. | |||
21905 | if ((VT == MVT::v4i32 && SrcVT == MVT::v4f32) || | |||
21906 | (VT == MVT::v4i32 && SrcVT == MVT::v4f64) || | |||
21907 | (VT == MVT::v8i32 && SrcVT == MVT::v8f32)) { | |||
21908 | assert(!IsSigned && "Expected unsigned conversion!")(static_cast <bool> (!IsSigned && "Expected unsigned conversion!" ) ? void (0) : __assert_fail ("!IsSigned && \"Expected unsigned conversion!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21908, __extension__ __PRETTY_FUNCTION__)); | |||
21909 | return expandFP_TO_UINT_SSE(VT, Src, dl, DAG, Subtarget); | |||
21910 | } | |||
21911 | ||||
21912 | return SDValue(); | |||
21913 | } | |||
21914 | ||||
21915 | assert(!VT.isVector())(static_cast <bool> (!VT.isVector()) ? void (0) : __assert_fail ("!VT.isVector()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21915, __extension__ __PRETTY_FUNCTION__)); | |||
21916 | ||||
21917 | bool UseSSEReg = isScalarFPTypeInSSEReg(SrcVT); | |||
21918 | ||||
21919 | if (!IsSigned && UseSSEReg) { | |||
21920 | // Conversions from f32/f64 with AVX512 should be legal. | |||
21921 | if (Subtarget.hasAVX512()) | |||
21922 | return Op; | |||
21923 | ||||
21924 | // We can leverage the specific way the "cvttss2si/cvttsd2si" instruction | |||
21925 | // behaves on out of range inputs to generate optimized conversions. | |||
21926 | if (!IsStrict && ((VT == MVT::i32 && !Subtarget.is64Bit()) || | |||
21927 | (VT == MVT::i64 && Subtarget.is64Bit()))) { | |||
21928 | unsigned DstBits = VT.getScalarSizeInBits(); | |||
21929 | APInt UIntLimit = APInt::getSignMask(DstBits); | |||
21930 | SDValue FloatOffset = DAG.getNode(ISD::UINT_TO_FP, dl, SrcVT, | |||
21931 | DAG.getConstant(UIntLimit, dl, VT)); | |||
21932 | MVT SrcVecVT = MVT::getVectorVT(SrcVT, 128 / SrcVT.getScalarSizeInBits()); | |||
21933 | ||||
21934 | // Calculate the converted result for values in the range: | |||
21935 | // (i32) 0 to 2^31-1 ("Small") and from 2^31 to 2^32-1 ("Big"). | |||
21936 | // (i64) 0 to 2^63-1 ("Small") and from 2^63 to 2^64-1 ("Big"). | |||
21937 | SDValue Small = | |||
21938 | DAG.getNode(X86ISD::CVTTS2SI, dl, VT, | |||
21939 | DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, SrcVecVT, Src)); | |||
21940 | SDValue Big = DAG.getNode( | |||
21941 | X86ISD::CVTTS2SI, dl, VT, | |||
21942 | DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, SrcVecVT, | |||
21943 | DAG.getNode(ISD::FSUB, dl, SrcVT, Src, FloatOffset))); | |||
21944 | ||||
21945 | // The "CVTTS2SI" instruction conveniently sets the sign bit if | |||
21946 | // and only if the value was out of range. So we can use that | |||
21947 | // as our indicator that we rather use "Big" instead of "Small". | |||
21948 | // | |||
21949 | // Use "Small" if "IsOverflown" has all bits cleared | |||
21950 | // and "0x80000000 | Big" if all bits in "IsOverflown" are set. | |||
21951 | SDValue IsOverflown = DAG.getNode( | |||
21952 | ISD::SRA, dl, VT, Small, DAG.getConstant(DstBits - 1, dl, MVT::i8)); | |||
21953 | return DAG.getNode(ISD::OR, dl, VT, Small, | |||
21954 | DAG.getNode(ISD::AND, dl, VT, Big, IsOverflown)); | |||
21955 | } | |||
21956 | ||||
21957 | // Use default expansion for i64. | |||
21958 | if (VT == MVT::i64) | |||
21959 | return SDValue(); | |||
21960 | ||||
21961 | assert(VT == MVT::i32 && "Unexpected VT!")(static_cast <bool> (VT == MVT::i32 && "Unexpected VT!" ) ? void (0) : __assert_fail ("VT == MVT::i32 && \"Unexpected VT!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21961, __extension__ __PRETTY_FUNCTION__)); | |||
21962 | ||||
21963 | // Promote i32 to i64 and use a signed operation on 64-bit targets. | |||
21964 | // FIXME: This does not generate an invalid exception if the input does not | |||
21965 | // fit in i32. PR44019 | |||
21966 | if (Subtarget.is64Bit()) { | |||
21967 | if (IsStrict) { | |||
21968 | Res = DAG.getNode(ISD::STRICT_FP_TO_SINT, dl, {MVT::i64, MVT::Other}, | |||
21969 | {Chain, Src}); | |||
21970 | Chain = Res.getValue(1); | |||
21971 | } else | |||
21972 | Res = DAG.getNode(ISD::FP_TO_SINT, dl, MVT::i64, Src); | |||
21973 | ||||
21974 | Res = DAG.getNode(ISD::TRUNCATE, dl, VT, Res); | |||
21975 | if (IsStrict) | |||
21976 | return DAG.getMergeValues({Res, Chain}, dl); | |||
21977 | return Res; | |||
21978 | } | |||
21979 | ||||
21980 | // Use default expansion for SSE1/2 targets without SSE3. With SSE3 we can | |||
21981 | // use fisttp which will be handled later. | |||
21982 | if (!Subtarget.hasSSE3()) | |||
21983 | return SDValue(); | |||
21984 | } | |||
21985 | ||||
21986 | // Promote i16 to i32 if we can use a SSE operation or the type is f128. | |||
21987 | // FIXME: This does not generate an invalid exception if the input does not | |||
21988 | // fit in i16. PR44019 | |||
21989 | if (VT == MVT::i16 && (UseSSEReg || SrcVT == MVT::f128)) { | |||
21990 | assert(IsSigned && "Expected i16 FP_TO_UINT to have been promoted!")(static_cast <bool> (IsSigned && "Expected i16 FP_TO_UINT to have been promoted!" ) ? void (0) : __assert_fail ("IsSigned && \"Expected i16 FP_TO_UINT to have been promoted!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 21990, __extension__ __PRETTY_FUNCTION__)); | |||
21991 | if (IsStrict) { | |||
21992 | Res = DAG.getNode(ISD::STRICT_FP_TO_SINT, dl, {MVT::i32, MVT::Other}, | |||
21993 | {Chain, Src}); | |||
21994 | Chain = Res.getValue(1); | |||
21995 | } else | |||
21996 | Res = DAG.getNode(ISD::FP_TO_SINT, dl, MVT::i32, Src); | |||
21997 | ||||
21998 | Res = DAG.getNode(ISD::TRUNCATE, dl, VT, Res); | |||
21999 | if (IsStrict) | |||
22000 | return DAG.getMergeValues({Res, Chain}, dl); | |||
22001 | return Res; | |||
22002 | } | |||
22003 | ||||
22004 | // If this is a FP_TO_SINT using SSEReg we're done. | |||
22005 | if (UseSSEReg && IsSigned) | |||
22006 | return Op; | |||
22007 | ||||
22008 | // fp128 needs to use a libcall. | |||
22009 | if (SrcVT == MVT::f128) { | |||
22010 | RTLIB::Libcall LC; | |||
22011 | if (IsSigned) | |||
22012 | LC = RTLIB::getFPTOSINT(SrcVT, VT); | |||
22013 | else | |||
22014 | LC = RTLIB::getFPTOUINT(SrcVT, VT); | |||
22015 | ||||
22016 | MakeLibCallOptions CallOptions; | |||
22017 | std::pair<SDValue, SDValue> Tmp = makeLibCall(DAG, LC, VT, Src, CallOptions, | |||
22018 | SDLoc(Op), Chain); | |||
22019 | ||||
22020 | if (IsStrict) | |||
22021 | return DAG.getMergeValues({ Tmp.first, Tmp.second }, dl); | |||
22022 | ||||
22023 | return Tmp.first; | |||
22024 | } | |||
22025 | ||||
22026 | // Fall back to X87. | |||
22027 | if (SDValue V = FP_TO_INTHelper(Op, DAG, IsSigned, Chain)) { | |||
22028 | if (IsStrict) | |||
22029 | return DAG.getMergeValues({V, Chain}, dl); | |||
22030 | return V; | |||
22031 | } | |||
22032 | ||||
22033 | llvm_unreachable("Expected FP_TO_INTHelper to handle all remaining cases.")::llvm::llvm_unreachable_internal("Expected FP_TO_INTHelper to handle all remaining cases." , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 22033); | |||
22034 | } | |||
22035 | ||||
22036 | SDValue X86TargetLowering::LowerLRINT_LLRINT(SDValue Op, | |||
22037 | SelectionDAG &DAG) const { | |||
22038 | SDValue Src = Op.getOperand(0); | |||
22039 | MVT SrcVT = Src.getSimpleValueType(); | |||
22040 | ||||
22041 | // If the source is in an SSE register, the node is Legal. | |||
22042 | if (isScalarFPTypeInSSEReg(SrcVT)) | |||
22043 | return Op; | |||
22044 | ||||
22045 | return LRINT_LLRINTHelper(Op.getNode(), DAG); | |||
22046 | } | |||
22047 | ||||
22048 | SDValue X86TargetLowering::LRINT_LLRINTHelper(SDNode *N, | |||
22049 | SelectionDAG &DAG) const { | |||
22050 | EVT DstVT = N->getValueType(0); | |||
22051 | SDValue Src = N->getOperand(0); | |||
22052 | EVT SrcVT = Src.getValueType(); | |||
22053 | ||||
22054 | if (SrcVT != MVT::f32 && SrcVT != MVT::f64 && SrcVT != MVT::f80) { | |||
22055 | // f16 must be promoted before using the lowering in this routine. | |||
22056 | // fp128 does not use this lowering. | |||
22057 | return SDValue(); | |||
22058 | } | |||
22059 | ||||
22060 | SDLoc DL(N); | |||
22061 | SDValue Chain = DAG.getEntryNode(); | |||
22062 | ||||
22063 | bool UseSSE = isScalarFPTypeInSSEReg(SrcVT); | |||
22064 | ||||
22065 | // If we're converting from SSE, the stack slot needs to hold both types. | |||
22066 | // Otherwise it only needs to hold the DstVT. | |||
22067 | EVT OtherVT = UseSSE ? SrcVT : DstVT; | |||
22068 | SDValue StackPtr = DAG.CreateStackTemporary(DstVT, OtherVT); | |||
22069 | int SPFI = cast<FrameIndexSDNode>(StackPtr.getNode())->getIndex(); | |||
22070 | MachinePointerInfo MPI = | |||
22071 | MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), SPFI); | |||
22072 | ||||
22073 | if (UseSSE) { | |||
22074 | assert(DstVT == MVT::i64 && "Invalid LRINT/LLRINT to lower!")(static_cast <bool> (DstVT == MVT::i64 && "Invalid LRINT/LLRINT to lower!" ) ? void (0) : __assert_fail ("DstVT == MVT::i64 && \"Invalid LRINT/LLRINT to lower!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 22074, __extension__ __PRETTY_FUNCTION__)); | |||
22075 | Chain = DAG.getStore(Chain, DL, Src, StackPtr, MPI); | |||
22076 | SDVTList Tys = DAG.getVTList(MVT::f80, MVT::Other); | |||
22077 | SDValue Ops[] = { Chain, StackPtr }; | |||
22078 | ||||
22079 | Src = DAG.getMemIntrinsicNode(X86ISD::FLD, DL, Tys, Ops, SrcVT, MPI, | |||
22080 | /*Align*/ None, MachineMemOperand::MOLoad); | |||
22081 | Chain = Src.getValue(1); | |||
22082 | } | |||
22083 | ||||
22084 | SDValue StoreOps[] = { Chain, Src, StackPtr }; | |||
22085 | Chain = DAG.getMemIntrinsicNode(X86ISD::FIST, DL, DAG.getVTList(MVT::Other), | |||
22086 | StoreOps, DstVT, MPI, /*Align*/ None, | |||
22087 | MachineMemOperand::MOStore); | |||
22088 | ||||
22089 | return DAG.getLoad(DstVT, DL, Chain, StackPtr, MPI); | |||
22090 | } | |||
22091 | ||||
22092 | SDValue | |||
22093 | X86TargetLowering::LowerFP_TO_INT_SAT(SDValue Op, SelectionDAG &DAG) const { | |||
22094 | // This is based on the TargetLowering::expandFP_TO_INT_SAT implementation, | |||
22095 | // but making use of X86 specifics to produce better instruction sequences. | |||
22096 | SDNode *Node = Op.getNode(); | |||
22097 | bool IsSigned = Node->getOpcode() == ISD::FP_TO_SINT_SAT; | |||
22098 | unsigned FpToIntOpcode = IsSigned ? ISD::FP_TO_SINT : ISD::FP_TO_UINT; | |||
22099 | SDLoc dl(SDValue(Node, 0)); | |||
22100 | SDValue Src = Node->getOperand(0); | |||
22101 | ||||
22102 | // There are three types involved here: SrcVT is the source floating point | |||
22103 | // type, DstVT is the type of the result, and TmpVT is the result of the | |||
22104 | // intermediate FP_TO_*INT operation we'll use (which may be a promotion of | |||
22105 | // DstVT). | |||
22106 | EVT SrcVT = Src.getValueType(); | |||
22107 | EVT DstVT = Node->getValueType(0); | |||
22108 | EVT TmpVT = DstVT; | |||
22109 | ||||
22110 | // This code is only for floats and doubles. Fall back to generic code for | |||
22111 | // anything else. | |||
22112 | if (!isScalarFPTypeInSSEReg(SrcVT)) | |||
22113 | return SDValue(); | |||
22114 | ||||
22115 | EVT SatVT = cast<VTSDNode>(Node->getOperand(1))->getVT(); | |||
22116 | unsigned SatWidth = SatVT.getScalarSizeInBits(); | |||
22117 | unsigned DstWidth = DstVT.getScalarSizeInBits(); | |||
22118 | unsigned TmpWidth = TmpVT.getScalarSizeInBits(); | |||
22119 | assert(SatWidth <= DstWidth && SatWidth <= TmpWidth &&(static_cast <bool> (SatWidth <= DstWidth && SatWidth <= TmpWidth && "Expected saturation width smaller than result width" ) ? void (0) : __assert_fail ("SatWidth <= DstWidth && SatWidth <= TmpWidth && \"Expected saturation width smaller than result width\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 22120, __extension__ __PRETTY_FUNCTION__)) | |||
22120 | "Expected saturation width smaller than result width")(static_cast <bool> (SatWidth <= DstWidth && SatWidth <= TmpWidth && "Expected saturation width smaller than result width" ) ? void (0) : __assert_fail ("SatWidth <= DstWidth && SatWidth <= TmpWidth && \"Expected saturation width smaller than result width\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 22120, __extension__ __PRETTY_FUNCTION__)); | |||
22121 | ||||
22122 | // Promote result of FP_TO_*INT to at least 32 bits. | |||
22123 | if (TmpWidth < 32) { | |||
22124 | TmpVT = MVT::i32; | |||
22125 | TmpWidth = 32; | |||
22126 | } | |||
22127 | ||||
22128 | // Promote conversions to unsigned 32-bit to 64-bit, because it will allow | |||
22129 | // us to use a native signed conversion instead. | |||
22130 | if (SatWidth == 32 && !IsSigned && Subtarget.is64Bit()) { | |||
22131 | TmpVT = MVT::i64; | |||
22132 | TmpWidth = 64; | |||
22133 | } | |||
22134 | ||||
22135 | // If the saturation width is smaller than the size of the temporary result, | |||
22136 | // we can always use signed conversion, which is native. | |||
22137 | if (SatWidth < TmpWidth) | |||
22138 | FpToIntOpcode = ISD::FP_TO_SINT; | |||
22139 | ||||
22140 | // Determine minimum and maximum integer values and their corresponding | |||
22141 | // floating-point values. | |||
22142 | APInt MinInt, MaxInt; | |||
22143 | if (IsSigned) { | |||
22144 | MinInt = APInt::getSignedMinValue(SatWidth).sextOrSelf(DstWidth); | |||
22145 | MaxInt = APInt::getSignedMaxValue(SatWidth).sextOrSelf(DstWidth); | |||
22146 | } else { | |||
22147 | MinInt = APInt::getMinValue(SatWidth).zextOrSelf(DstWidth); | |||
22148 | MaxInt = APInt::getMaxValue(SatWidth).zextOrSelf(DstWidth); | |||
22149 | } | |||
22150 | ||||
22151 | APFloat MinFloat(DAG.EVTToAPFloatSemantics(SrcVT)); | |||
22152 | APFloat MaxFloat(DAG.EVTToAPFloatSemantics(SrcVT)); | |||
22153 | ||||
22154 | APFloat::opStatus MinStatus = MinFloat.convertFromAPInt( | |||
22155 | MinInt, IsSigned, APFloat::rmTowardZero); | |||
22156 | APFloat::opStatus MaxStatus = MaxFloat.convertFromAPInt( | |||
22157 | MaxInt, IsSigned, APFloat::rmTowardZero); | |||
22158 | bool AreExactFloatBounds = !(MinStatus & APFloat::opStatus::opInexact) | |||
22159 | && !(MaxStatus & APFloat::opStatus::opInexact); | |||
22160 | ||||
22161 | SDValue MinFloatNode = DAG.getConstantFP(MinFloat, dl, SrcVT); | |||
22162 | SDValue MaxFloatNode = DAG.getConstantFP(MaxFloat, dl, SrcVT); | |||
22163 | ||||
22164 | // If the integer bounds are exactly representable as floats, emit a | |||
22165 | // min+max+fptoi sequence. Otherwise use comparisons and selects. | |||
22166 | if (AreExactFloatBounds) { | |||
22167 | if (DstVT != TmpVT) { | |||
22168 | // Clamp by MinFloat from below. If Src is NaN, propagate NaN. | |||
22169 | SDValue MinClamped = DAG.getNode( | |||
22170 | X86ISD::FMAX, dl, SrcVT, MinFloatNode, Src); | |||
22171 | // Clamp by MaxFloat from above. If Src is NaN, propagate NaN. | |||
22172 | SDValue BothClamped = DAG.getNode( | |||
22173 | X86ISD::FMIN, dl, SrcVT, MaxFloatNode, MinClamped); | |||
22174 | // Convert clamped value to integer. | |||
22175 | SDValue FpToInt = DAG.getNode(FpToIntOpcode, dl, TmpVT, BothClamped); | |||
22176 | ||||
22177 | // NaN will become INDVAL, with the top bit set and the rest zero. | |||
22178 | // Truncation will discard the top bit, resulting in zero. | |||
22179 | return DAG.getNode(ISD::TRUNCATE, dl, DstVT, FpToInt); | |||
22180 | } | |||
22181 | ||||
22182 | // Clamp by MinFloat from below. If Src is NaN, the result is MinFloat. | |||
22183 | SDValue MinClamped = DAG.getNode( | |||
22184 | X86ISD::FMAX, dl, SrcVT, Src, MinFloatNode); | |||
22185 | // Clamp by MaxFloat from above. NaN cannot occur. | |||
22186 | SDValue BothClamped = DAG.getNode( | |||
22187 | X86ISD::FMINC, dl, SrcVT, MinClamped, MaxFloatNode); | |||
22188 | // Convert clamped value to integer. | |||
22189 | SDValue FpToInt = DAG.getNode(FpToIntOpcode, dl, DstVT, BothClamped); | |||
22190 | ||||
22191 | if (!IsSigned) { | |||
22192 | // In the unsigned case we're done, because we mapped NaN to MinFloat, | |||
22193 | // which is zero. | |||
22194 | return FpToInt; | |||
22195 | } | |||
22196 | ||||
22197 | // Otherwise, select zero if Src is NaN. | |||
22198 | SDValue ZeroInt = DAG.getConstant(0, dl, DstVT); | |||
22199 | return DAG.getSelectCC( | |||
22200 | dl, Src, Src, ZeroInt, FpToInt, ISD::CondCode::SETUO); | |||
22201 | } | |||
22202 | ||||
22203 | SDValue MinIntNode = DAG.getConstant(MinInt, dl, DstVT); | |||
22204 | SDValue MaxIntNode = DAG.getConstant(MaxInt, dl, DstVT); | |||
22205 | ||||
22206 | // Result of direct conversion, which may be selected away. | |||
22207 | SDValue FpToInt = DAG.getNode(FpToIntOpcode, dl, TmpVT, Src); | |||
22208 | ||||
22209 | if (DstVT != TmpVT) { | |||
22210 | // NaN will become INDVAL, with the top bit set and the rest zero. | |||
22211 | // Truncation will discard the top bit, resulting in zero. | |||
22212 | FpToInt = DAG.getNode(ISD::TRUNCATE, dl, DstVT, FpToInt); | |||
22213 | } | |||
22214 | ||||
22215 | SDValue Select = FpToInt; | |||
22216 | // For signed conversions where we saturate to the same size as the | |||
22217 | // result type of the fptoi instructions, INDVAL coincides with integer | |||
22218 | // minimum, so we don't need to explicitly check it. | |||
22219 | if (!IsSigned || SatWidth != TmpVT.getScalarSizeInBits()) { | |||
22220 | // If Src ULT MinFloat, select MinInt. In particular, this also selects | |||
22221 | // MinInt if Src is NaN. | |||
22222 | Select = DAG.getSelectCC( | |||
22223 | dl, Src, MinFloatNode, MinIntNode, Select, ISD::CondCode::SETULT); | |||
22224 | } | |||
22225 | ||||
22226 | // If Src OGT MaxFloat, select MaxInt. | |||
22227 | Select = DAG.getSelectCC( | |||
22228 | dl, Src, MaxFloatNode, MaxIntNode, Select, ISD::CondCode::SETOGT); | |||
22229 | ||||
22230 | // In the unsigned case we are done, because we mapped NaN to MinInt, which | |||
22231 | // is already zero. The promoted case was already handled above. | |||
22232 | if (!IsSigned || DstVT != TmpVT) { | |||
22233 | return Select; | |||
22234 | } | |||
22235 | ||||
22236 | // Otherwise, select 0 if Src is NaN. | |||
22237 | SDValue ZeroInt = DAG.getConstant(0, dl, DstVT); | |||
22238 | return DAG.getSelectCC( | |||
22239 | dl, Src, Src, ZeroInt, Select, ISD::CondCode::SETUO); | |||
22240 | } | |||
22241 | ||||
22242 | SDValue X86TargetLowering::LowerFP_EXTEND(SDValue Op, SelectionDAG &DAG) const { | |||
22243 | bool IsStrict = Op->isStrictFPOpcode(); | |||
22244 | ||||
22245 | SDLoc DL(Op); | |||
22246 | MVT VT = Op.getSimpleValueType(); | |||
22247 | SDValue In = Op.getOperand(IsStrict ? 1 : 0); | |||
22248 | MVT SVT = In.getSimpleValueType(); | |||
22249 | ||||
22250 | if (VT == MVT::f128) | |||
22251 | return SDValue(); | |||
22252 | ||||
22253 | if (VT == MVT::f80) { | |||
22254 | if (SVT == MVT::f16) { | |||
22255 | assert(Subtarget.hasFP16() && "Unexpected features!")(static_cast <bool> (Subtarget.hasFP16() && "Unexpected features!" ) ? void (0) : __assert_fail ("Subtarget.hasFP16() && \"Unexpected features!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 22255, __extension__ __PRETTY_FUNCTION__)); | |||
22256 | RTLIB::Libcall LC = RTLIB::getFPEXT(SVT, VT); | |||
22257 | MakeLibCallOptions CallOptions; | |||
22258 | std::pair<SDValue, SDValue> Tmp = | |||
22259 | makeLibCall(DAG, LC, VT, In, CallOptions, DL, | |||
22260 | IsStrict ? Op.getOperand(0) : SDValue()); | |||
22261 | if (IsStrict) | |||
22262 | return DAG.getMergeValues({Tmp.first, Tmp.second}, DL); | |||
22263 | else | |||
22264 | return Tmp.first; | |||
22265 | } | |||
22266 | return Op; | |||
22267 | } | |||
22268 | ||||
22269 | if (SVT.getVectorElementType() == MVT::f16) { | |||
22270 | assert(Subtarget.hasFP16() && Subtarget.hasVLX() && "Unexpected features!")(static_cast <bool> (Subtarget.hasFP16() && Subtarget .hasVLX() && "Unexpected features!") ? void (0) : __assert_fail ("Subtarget.hasFP16() && Subtarget.hasVLX() && \"Unexpected features!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 22270, __extension__ __PRETTY_FUNCTION__)); | |||
22271 | if (SVT == MVT::v2f16) | |||
22272 | In = DAG.getNode(ISD::CONCAT_VECTORS, DL, MVT::v4f16, In, | |||
22273 | DAG.getUNDEF(MVT::v2f16)); | |||
22274 | SDValue Res = DAG.getNode(ISD::CONCAT_VECTORS, DL, MVT::v8f16, In, | |||
22275 | DAG.getUNDEF(MVT::v4f16)); | |||
22276 | if (IsStrict) | |||
22277 | return DAG.getNode(X86ISD::STRICT_VFPEXT, DL, {VT, MVT::Other}, | |||
22278 | {Op->getOperand(0), Res}); | |||
22279 | return DAG.getNode(X86ISD::VFPEXT, DL, VT, Res); | |||
22280 | } | |||
22281 | ||||
22282 | assert(SVT == MVT::v2f32 && "Only customize MVT::v2f32 type legalization!")(static_cast <bool> (SVT == MVT::v2f32 && "Only customize MVT::v2f32 type legalization!" ) ? void (0) : __assert_fail ("SVT == MVT::v2f32 && \"Only customize MVT::v2f32 type legalization!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 22282, __extension__ __PRETTY_FUNCTION__)); | |||
22283 | ||||
22284 | SDValue Res = | |||
22285 | DAG.getNode(ISD::CONCAT_VECTORS, DL, MVT::v4f32, In, DAG.getUNDEF(SVT)); | |||
22286 | if (IsStrict) | |||
22287 | return DAG.getNode(X86ISD::STRICT_VFPEXT, DL, {VT, MVT::Other}, | |||
22288 | {Op->getOperand(0), Res}); | |||
22289 | return DAG.getNode(X86ISD::VFPEXT, DL, VT, Res); | |||
22290 | } | |||
22291 | ||||
22292 | SDValue X86TargetLowering::LowerFP_ROUND(SDValue Op, SelectionDAG &DAG) const { | |||
22293 | bool IsStrict = Op->isStrictFPOpcode(); | |||
22294 | SDValue In = Op.getOperand(IsStrict ? 1 : 0); | |||
22295 | MVT VT = Op.getSimpleValueType(); | |||
22296 | MVT SVT = In.getSimpleValueType(); | |||
22297 | ||||
22298 | // It's legal except when f128 is involved or we're converting f80->f16. | |||
22299 | if (SVT != MVT::f128 && !(VT == MVT::f16 && SVT == MVT::f80)) | |||
22300 | return Op; | |||
22301 | ||||
22302 | return SDValue(); | |||
22303 | } | |||
22304 | ||||
22305 | static SDValue LowerFP16_TO_FP(SDValue Op, SelectionDAG &DAG) { | |||
22306 | bool IsStrict = Op->isStrictFPOpcode(); | |||
22307 | SDValue Src = Op.getOperand(IsStrict ? 1 : 0); | |||
22308 | assert(Src.getValueType() == MVT::i16 && Op.getValueType() == MVT::f32 &&(static_cast <bool> (Src.getValueType() == MVT::i16 && Op.getValueType() == MVT::f32 && "Unexpected VT!") ? void (0) : __assert_fail ("Src.getValueType() == MVT::i16 && Op.getValueType() == MVT::f32 && \"Unexpected VT!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 22309, __extension__ __PRETTY_FUNCTION__)) | |||
22309 | "Unexpected VT!")(static_cast <bool> (Src.getValueType() == MVT::i16 && Op.getValueType() == MVT::f32 && "Unexpected VT!") ? void (0) : __assert_fail ("Src.getValueType() == MVT::i16 && Op.getValueType() == MVT::f32 && \"Unexpected VT!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 22309, __extension__ __PRETTY_FUNCTION__)); | |||
22310 | ||||
22311 | SDLoc dl(Op); | |||
22312 | SDValue Res = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, | |||
22313 | DAG.getConstant(0, dl, MVT::v8i16), Src, | |||
22314 | DAG.getIntPtrConstant(0, dl)); | |||
22315 | ||||
22316 | SDValue Chain; | |||
22317 | if (IsStrict) { | |||
22318 | Res = DAG.getNode(X86ISD::STRICT_CVTPH2PS, dl, {MVT::v4f32, MVT::Other}, | |||
22319 | {Op.getOperand(0), Res}); | |||
22320 | Chain = Res.getValue(1); | |||
22321 | } else { | |||
22322 | Res = DAG.getNode(X86ISD::CVTPH2PS, dl, MVT::v4f32, Res); | |||
22323 | } | |||
22324 | ||||
22325 | Res = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f32, Res, | |||
22326 | DAG.getIntPtrConstant(0, dl)); | |||
22327 | ||||
22328 | if (IsStrict) | |||
22329 | return DAG.getMergeValues({Res, Chain}, dl); | |||
22330 | ||||
22331 | return Res; | |||
22332 | } | |||
22333 | ||||
22334 | static SDValue LowerFP_TO_FP16(SDValue Op, SelectionDAG &DAG) { | |||
22335 | bool IsStrict = Op->isStrictFPOpcode(); | |||
22336 | SDValue Src = Op.getOperand(IsStrict ? 1 : 0); | |||
22337 | assert(Src.getValueType() == MVT::f32 && Op.getValueType() == MVT::i16 &&(static_cast <bool> (Src.getValueType() == MVT::f32 && Op.getValueType() == MVT::i16 && "Unexpected VT!") ? void (0) : __assert_fail ("Src.getValueType() == MVT::f32 && Op.getValueType() == MVT::i16 && \"Unexpected VT!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 22338, __extension__ __PRETTY_FUNCTION__)) | |||
22338 | "Unexpected VT!")(static_cast <bool> (Src.getValueType() == MVT::f32 && Op.getValueType() == MVT::i16 && "Unexpected VT!") ? void (0) : __assert_fail ("Src.getValueType() == MVT::f32 && Op.getValueType() == MVT::i16 && \"Unexpected VT!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 22338, __extension__ __PRETTY_FUNCTION__)); | |||
22339 | ||||
22340 | SDLoc dl(Op); | |||
22341 | SDValue Res, Chain; | |||
22342 | if (IsStrict) { | |||
22343 | Res = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v4f32, | |||
22344 | DAG.getConstantFP(0, dl, MVT::v4f32), Src, | |||
22345 | DAG.getIntPtrConstant(0, dl)); | |||
22346 | Res = DAG.getNode( | |||
22347 | X86ISD::STRICT_CVTPS2PH, dl, {MVT::v8i16, MVT::Other}, | |||
22348 | {Op.getOperand(0), Res, DAG.getTargetConstant(4, dl, MVT::i32)}); | |||
22349 | Chain = Res.getValue(1); | |||
22350 | } else { | |||
22351 | // FIXME: Should we use zeros for upper elements for non-strict? | |||
22352 | Res = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4f32, Src); | |||
22353 | Res = DAG.getNode(X86ISD::CVTPS2PH, dl, MVT::v8i16, Res, | |||
22354 | DAG.getTargetConstant(4, dl, MVT::i32)); | |||
22355 | } | |||
22356 | ||||
22357 | Res = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, Res, | |||
22358 | DAG.getIntPtrConstant(0, dl)); | |||
22359 | ||||
22360 | if (IsStrict) | |||
22361 | return DAG.getMergeValues({Res, Chain}, dl); | |||
22362 | ||||
22363 | return Res; | |||
22364 | } | |||
22365 | ||||
22366 | /// Depending on uarch and/or optimizing for size, we might prefer to use a | |||
22367 | /// vector operation in place of the typical scalar operation. | |||
22368 | static SDValue lowerAddSubToHorizontalOp(SDValue Op, SelectionDAG &DAG, | |||
22369 | const X86Subtarget &Subtarget) { | |||
22370 | // If both operands have other uses, this is probably not profitable. | |||
22371 | SDValue LHS = Op.getOperand(0); | |||
22372 | SDValue RHS = Op.getOperand(1); | |||
22373 | if (!LHS.hasOneUse() && !RHS.hasOneUse()) | |||
22374 | return Op; | |||
22375 | ||||
22376 | // FP horizontal add/sub were added with SSE3. Integer with SSSE3. | |||
22377 | bool IsFP = Op.getSimpleValueType().isFloatingPoint(); | |||
22378 | if (IsFP && !Subtarget.hasSSE3()) | |||
22379 | return Op; | |||
22380 | if (!IsFP && !Subtarget.hasSSSE3()) | |||
22381 | return Op; | |||
22382 | ||||
22383 | // Extract from a common vector. | |||
22384 | if (LHS.getOpcode() != ISD::EXTRACT_VECTOR_ELT || | |||
22385 | RHS.getOpcode() != ISD::EXTRACT_VECTOR_ELT || | |||
22386 | LHS.getOperand(0) != RHS.getOperand(0) || | |||
22387 | !isa<ConstantSDNode>(LHS.getOperand(1)) || | |||
22388 | !isa<ConstantSDNode>(RHS.getOperand(1)) || | |||
22389 | !shouldUseHorizontalOp(true, DAG, Subtarget)) | |||
22390 | return Op; | |||
22391 | ||||
22392 | // Allow commuted 'hadd' ops. | |||
22393 | // TODO: Allow commuted (f)sub by negating the result of (F)HSUB? | |||
22394 | unsigned HOpcode; | |||
22395 | switch (Op.getOpcode()) { | |||
22396 | case ISD::ADD: HOpcode = X86ISD::HADD; break; | |||
22397 | case ISD::SUB: HOpcode = X86ISD::HSUB; break; | |||
22398 | case ISD::FADD: HOpcode = X86ISD::FHADD; break; | |||
22399 | case ISD::FSUB: HOpcode = X86ISD::FHSUB; break; | |||
22400 | default: | |||
22401 | llvm_unreachable("Trying to lower unsupported opcode to horizontal op")::llvm::llvm_unreachable_internal("Trying to lower unsupported opcode to horizontal op" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 22401); | |||
22402 | } | |||
22403 | unsigned LExtIndex = LHS.getConstantOperandVal(1); | |||
22404 | unsigned RExtIndex = RHS.getConstantOperandVal(1); | |||
22405 | if ((LExtIndex & 1) == 1 && (RExtIndex & 1) == 0 && | |||
22406 | (HOpcode == X86ISD::HADD || HOpcode == X86ISD::FHADD)) | |||
22407 | std::swap(LExtIndex, RExtIndex); | |||
22408 | ||||
22409 | if ((LExtIndex & 1) != 0 || RExtIndex != (LExtIndex + 1)) | |||
22410 | return Op; | |||
22411 | ||||
22412 | SDValue X = LHS.getOperand(0); | |||
22413 | EVT VecVT = X.getValueType(); | |||
22414 | unsigned BitWidth = VecVT.getSizeInBits(); | |||
22415 | unsigned NumLanes = BitWidth / 128; | |||
22416 | unsigned NumEltsPerLane = VecVT.getVectorNumElements() / NumLanes; | |||
22417 | assert((BitWidth == 128 || BitWidth == 256 || BitWidth == 512) &&(static_cast <bool> ((BitWidth == 128 || BitWidth == 256 || BitWidth == 512) && "Not expecting illegal vector widths here" ) ? void (0) : __assert_fail ("(BitWidth == 128 || BitWidth == 256 || BitWidth == 512) && \"Not expecting illegal vector widths here\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 22418, __extension__ __PRETTY_FUNCTION__)) | |||
22418 | "Not expecting illegal vector widths here")(static_cast <bool> ((BitWidth == 128 || BitWidth == 256 || BitWidth == 512) && "Not expecting illegal vector widths here" ) ? void (0) : __assert_fail ("(BitWidth == 128 || BitWidth == 256 || BitWidth == 512) && \"Not expecting illegal vector widths here\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 22418, __extension__ __PRETTY_FUNCTION__)); | |||
22419 | ||||
22420 | // Creating a 256-bit horizontal op would be wasteful, and there is no 512-bit | |||
22421 | // equivalent, so extract the 256/512-bit source op to 128-bit if we can. | |||
22422 | SDLoc DL(Op); | |||
22423 | if (BitWidth == 256 || BitWidth == 512) { | |||
22424 | unsigned LaneIdx = LExtIndex / NumEltsPerLane; | |||
22425 | X = extract128BitVector(X, LaneIdx * NumEltsPerLane, DAG, DL); | |||
22426 | LExtIndex %= NumEltsPerLane; | |||
22427 | } | |||
22428 | ||||
22429 | // add (extractelt (X, 0), extractelt (X, 1)) --> extractelt (hadd X, X), 0 | |||
22430 | // add (extractelt (X, 1), extractelt (X, 0)) --> extractelt (hadd X, X), 0 | |||
22431 | // add (extractelt (X, 2), extractelt (X, 3)) --> extractelt (hadd X, X), 1 | |||
22432 | // sub (extractelt (X, 0), extractelt (X, 1)) --> extractelt (hsub X, X), 0 | |||
22433 | SDValue HOp = DAG.getNode(HOpcode, DL, X.getValueType(), X, X); | |||
22434 | return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, Op.getSimpleValueType(), HOp, | |||
22435 | DAG.getIntPtrConstant(LExtIndex / 2, DL)); | |||
22436 | } | |||
22437 | ||||
22438 | /// Depending on uarch and/or optimizing for size, we might prefer to use a | |||
22439 | /// vector operation in place of the typical scalar operation. | |||
22440 | SDValue X86TargetLowering::lowerFaddFsub(SDValue Op, SelectionDAG &DAG) const { | |||
22441 | assert((Op.getValueType() == MVT::f32 || Op.getValueType() == MVT::f64) &&(static_cast <bool> ((Op.getValueType() == MVT::f32 || Op .getValueType() == MVT::f64) && "Only expecting float/double" ) ? void (0) : __assert_fail ("(Op.getValueType() == MVT::f32 || Op.getValueType() == MVT::f64) && \"Only expecting float/double\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 22442, __extension__ __PRETTY_FUNCTION__)) | |||
22442 | "Only expecting float/double")(static_cast <bool> ((Op.getValueType() == MVT::f32 || Op .getValueType() == MVT::f64) && "Only expecting float/double" ) ? void (0) : __assert_fail ("(Op.getValueType() == MVT::f32 || Op.getValueType() == MVT::f64) && \"Only expecting float/double\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 22442, __extension__ __PRETTY_FUNCTION__)); | |||
22443 | return lowerAddSubToHorizontalOp(Op, DAG, Subtarget); | |||
22444 | } | |||
22445 | ||||
22446 | /// ISD::FROUND is defined to round to nearest with ties rounding away from 0. | |||
22447 | /// This mode isn't supported in hardware on X86. But as long as we aren't | |||
22448 | /// compiling with trapping math, we can emulate this with | |||
22449 | /// floor(X + copysign(nextafter(0.5, 0.0), X)). | |||
22450 | static SDValue LowerFROUND(SDValue Op, SelectionDAG &DAG) { | |||
22451 | SDValue N0 = Op.getOperand(0); | |||
22452 | SDLoc dl(Op); | |||
22453 | MVT VT = Op.getSimpleValueType(); | |||
22454 | ||||
22455 | // N0 += copysign(nextafter(0.5, 0.0), N0) | |||
22456 | const fltSemantics &Sem = SelectionDAG::EVTToAPFloatSemantics(VT); | |||
22457 | bool Ignored; | |||
22458 | APFloat Point5Pred = APFloat(0.5f); | |||
22459 | Point5Pred.convert(Sem, APFloat::rmNearestTiesToEven, &Ignored); | |||
22460 | Point5Pred.next(/*nextDown*/true); | |||
22461 | ||||
22462 | SDValue Adder = DAG.getNode(ISD::FCOPYSIGN, dl, VT, | |||
22463 | DAG.getConstantFP(Point5Pred, dl, VT), N0); | |||
22464 | N0 = DAG.getNode(ISD::FADD, dl, VT, N0, Adder); | |||
22465 | ||||
22466 | // Truncate the result to remove fraction. | |||
22467 | return DAG.getNode(ISD::FTRUNC, dl, VT, N0); | |||
22468 | } | |||
22469 | ||||
22470 | /// The only differences between FABS and FNEG are the mask and the logic op. | |||
22471 | /// FNEG also has a folding opportunity for FNEG(FABS(x)). | |||
22472 | static SDValue LowerFABSorFNEG(SDValue Op, SelectionDAG &DAG) { | |||
22473 | assert((Op.getOpcode() == ISD::FABS || Op.getOpcode() == ISD::FNEG) &&(static_cast <bool> ((Op.getOpcode() == ISD::FABS || Op .getOpcode() == ISD::FNEG) && "Wrong opcode for lowering FABS or FNEG." ) ? void (0) : __assert_fail ("(Op.getOpcode() == ISD::FABS || Op.getOpcode() == ISD::FNEG) && \"Wrong opcode for lowering FABS or FNEG.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 22474, __extension__ __PRETTY_FUNCTION__)) | |||
22474 | "Wrong opcode for lowering FABS or FNEG.")(static_cast <bool> ((Op.getOpcode() == ISD::FABS || Op .getOpcode() == ISD::FNEG) && "Wrong opcode for lowering FABS or FNEG." ) ? void (0) : __assert_fail ("(Op.getOpcode() == ISD::FABS || Op.getOpcode() == ISD::FNEG) && \"Wrong opcode for lowering FABS or FNEG.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 22474, __extension__ __PRETTY_FUNCTION__)); | |||
22475 | ||||
22476 | bool IsFABS = (Op.getOpcode() == ISD::FABS); | |||
22477 | ||||
22478 | // If this is a FABS and it has an FNEG user, bail out to fold the combination | |||
22479 | // into an FNABS. We'll lower the FABS after that if it is still in use. | |||
22480 | if (IsFABS) | |||
22481 | for (SDNode *User : Op->uses()) | |||
22482 | if (User->getOpcode() == ISD::FNEG) | |||
22483 | return Op; | |||
22484 | ||||
22485 | SDLoc dl(Op); | |||
22486 | MVT VT = Op.getSimpleValueType(); | |||
22487 | ||||
22488 | bool IsF128 = (VT == MVT::f128); | |||
22489 | assert(VT.isFloatingPoint() && VT != MVT::f80 &&(static_cast <bool> (VT.isFloatingPoint() && VT != MVT::f80 && DAG.getTargetLoweringInfo().isTypeLegal (VT) && "Unexpected type in LowerFABSorFNEG") ? void ( 0) : __assert_fail ("VT.isFloatingPoint() && VT != MVT::f80 && DAG.getTargetLoweringInfo().isTypeLegal(VT) && \"Unexpected type in LowerFABSorFNEG\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 22491, __extension__ __PRETTY_FUNCTION__)) | |||
22490 | DAG.getTargetLoweringInfo().isTypeLegal(VT) &&(static_cast <bool> (VT.isFloatingPoint() && VT != MVT::f80 && DAG.getTargetLoweringInfo().isTypeLegal (VT) && "Unexpected type in LowerFABSorFNEG") ? void ( 0) : __assert_fail ("VT.isFloatingPoint() && VT != MVT::f80 && DAG.getTargetLoweringInfo().isTypeLegal(VT) && \"Unexpected type in LowerFABSorFNEG\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 22491, __extension__ __PRETTY_FUNCTION__)) | |||
22491 | "Unexpected type in LowerFABSorFNEG")(static_cast <bool> (VT.isFloatingPoint() && VT != MVT::f80 && DAG.getTargetLoweringInfo().isTypeLegal (VT) && "Unexpected type in LowerFABSorFNEG") ? void ( 0) : __assert_fail ("VT.isFloatingPoint() && VT != MVT::f80 && DAG.getTargetLoweringInfo().isTypeLegal(VT) && \"Unexpected type in LowerFABSorFNEG\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 22491, __extension__ __PRETTY_FUNCTION__)); | |||
22492 | ||||
22493 | // FIXME: Use function attribute "OptimizeForSize" and/or CodeGenOpt::Level to | |||
22494 | // decide if we should generate a 16-byte constant mask when we only need 4 or | |||
22495 | // 8 bytes for the scalar case. | |||
22496 | ||||
22497 | // There are no scalar bitwise logical SSE/AVX instructions, so we | |||
22498 | // generate a 16-byte vector constant and logic op even for the scalar case. | |||
22499 | // Using a 16-byte mask allows folding the load of the mask with | |||
22500 | // the logic op, so it can save (~4 bytes) on code size. | |||
22501 | bool IsFakeVector = !VT.isVector() && !IsF128; | |||
22502 | MVT LogicVT = VT; | |||
22503 | if (IsFakeVector) | |||
22504 | LogicVT = (VT == MVT::f64) ? MVT::v2f64 | |||
22505 | : (VT == MVT::f32) ? MVT::v4f32 | |||
22506 | : MVT::v8f16; | |||
22507 | ||||
22508 | unsigned EltBits = VT.getScalarSizeInBits(); | |||
22509 | // For FABS, mask is 0x7f...; for FNEG, mask is 0x80... | |||
22510 | APInt MaskElt = IsFABS ? APInt::getSignedMaxValue(EltBits) : | |||
22511 | APInt::getSignMask(EltBits); | |||
22512 | const fltSemantics &Sem = SelectionDAG::EVTToAPFloatSemantics(VT); | |||
22513 | SDValue Mask = DAG.getConstantFP(APFloat(Sem, MaskElt), dl, LogicVT); | |||
22514 | ||||
22515 | SDValue Op0 = Op.getOperand(0); | |||
22516 | bool IsFNABS = !IsFABS && (Op0.getOpcode() == ISD::FABS); | |||
22517 | unsigned LogicOp = IsFABS ? X86ISD::FAND : | |||
22518 | IsFNABS ? X86ISD::FOR : | |||
22519 | X86ISD::FXOR; | |||
22520 | SDValue Operand = IsFNABS ? Op0.getOperand(0) : Op0; | |||
22521 | ||||
22522 | if (VT.isVector() || IsF128) | |||
22523 | return DAG.getNode(LogicOp, dl, LogicVT, Operand, Mask); | |||
22524 | ||||
22525 | // For the scalar case extend to a 128-bit vector, perform the logic op, | |||
22526 | // and extract the scalar result back out. | |||
22527 | Operand = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, LogicVT, Operand); | |||
22528 | SDValue LogicNode = DAG.getNode(LogicOp, dl, LogicVT, Operand, Mask); | |||
22529 | return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, VT, LogicNode, | |||
22530 | DAG.getIntPtrConstant(0, dl)); | |||
22531 | } | |||
22532 | ||||
22533 | static SDValue LowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG) { | |||
22534 | SDValue Mag = Op.getOperand(0); | |||
22535 | SDValue Sign = Op.getOperand(1); | |||
22536 | SDLoc dl(Op); | |||
22537 | ||||
22538 | // If the sign operand is smaller, extend it first. | |||
22539 | MVT VT = Op.getSimpleValueType(); | |||
22540 | if (Sign.getSimpleValueType().bitsLT(VT)) | |||
22541 | Sign = DAG.getNode(ISD::FP_EXTEND, dl, VT, Sign); | |||
22542 | ||||
22543 | // And if it is bigger, shrink it first. | |||
22544 | if (Sign.getSimpleValueType().bitsGT(VT)) | |||
22545 | Sign = | |||
22546 | DAG.getNode(ISD::FP_ROUND, dl, VT, Sign, DAG.getIntPtrConstant(0, dl)); | |||
22547 | ||||
22548 | // At this point the operands and the result should have the same | |||
22549 | // type, and that won't be f80 since that is not custom lowered. | |||
22550 | bool IsF128 = (VT == MVT::f128); | |||
22551 | assert(VT.isFloatingPoint() && VT != MVT::f80 &&(static_cast <bool> (VT.isFloatingPoint() && VT != MVT::f80 && DAG.getTargetLoweringInfo().isTypeLegal (VT) && "Unexpected type in LowerFCOPYSIGN") ? void ( 0) : __assert_fail ("VT.isFloatingPoint() && VT != MVT::f80 && DAG.getTargetLoweringInfo().isTypeLegal(VT) && \"Unexpected type in LowerFCOPYSIGN\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 22553, __extension__ __PRETTY_FUNCTION__)) | |||
22552 | DAG.getTargetLoweringInfo().isTypeLegal(VT) &&(static_cast <bool> (VT.isFloatingPoint() && VT != MVT::f80 && DAG.getTargetLoweringInfo().isTypeLegal (VT) && "Unexpected type in LowerFCOPYSIGN") ? void ( 0) : __assert_fail ("VT.isFloatingPoint() && VT != MVT::f80 && DAG.getTargetLoweringInfo().isTypeLegal(VT) && \"Unexpected type in LowerFCOPYSIGN\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 22553, __extension__ __PRETTY_FUNCTION__)) | |||
22553 | "Unexpected type in LowerFCOPYSIGN")(static_cast <bool> (VT.isFloatingPoint() && VT != MVT::f80 && DAG.getTargetLoweringInfo().isTypeLegal (VT) && "Unexpected type in LowerFCOPYSIGN") ? void ( 0) : __assert_fail ("VT.isFloatingPoint() && VT != MVT::f80 && DAG.getTargetLoweringInfo().isTypeLegal(VT) && \"Unexpected type in LowerFCOPYSIGN\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 22553, __extension__ __PRETTY_FUNCTION__)); | |||
22554 | ||||
22555 | const fltSemantics &Sem = SelectionDAG::EVTToAPFloatSemantics(VT); | |||
22556 | ||||
22557 | // Perform all scalar logic operations as 16-byte vectors because there are no | |||
22558 | // scalar FP logic instructions in SSE. | |||
22559 | // TODO: This isn't necessary. If we used scalar types, we might avoid some | |||
22560 | // unnecessary splats, but we might miss load folding opportunities. Should | |||
22561 | // this decision be based on OptimizeForSize? | |||
22562 | bool IsFakeVector = !VT.isVector() && !IsF128; | |||
22563 | MVT LogicVT = VT; | |||
22564 | if (IsFakeVector) | |||
22565 | LogicVT = (VT == MVT::f64) ? MVT::v2f64 | |||
22566 | : (VT == MVT::f32) ? MVT::v4f32 | |||
22567 | : MVT::v8f16; | |||
22568 | ||||
22569 | // The mask constants are automatically splatted for vector types. | |||
22570 | unsigned EltSizeInBits = VT.getScalarSizeInBits(); | |||
22571 | SDValue SignMask = DAG.getConstantFP( | |||
22572 | APFloat(Sem, APInt::getSignMask(EltSizeInBits)), dl, LogicVT); | |||
22573 | SDValue MagMask = DAG.getConstantFP( | |||
22574 | APFloat(Sem, APInt::getSignedMaxValue(EltSizeInBits)), dl, LogicVT); | |||
22575 | ||||
22576 | // First, clear all bits but the sign bit from the second operand (sign). | |||
22577 | if (IsFakeVector) | |||
22578 | Sign = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, LogicVT, Sign); | |||
22579 | SDValue SignBit = DAG.getNode(X86ISD::FAND, dl, LogicVT, Sign, SignMask); | |||
22580 | ||||
22581 | // Next, clear the sign bit from the first operand (magnitude). | |||
22582 | // TODO: If we had general constant folding for FP logic ops, this check | |||
22583 | // wouldn't be necessary. | |||
22584 | SDValue MagBits; | |||
22585 | if (ConstantFPSDNode *Op0CN = isConstOrConstSplatFP(Mag)) { | |||
22586 | APFloat APF = Op0CN->getValueAPF(); | |||
22587 | APF.clearSign(); | |||
22588 | MagBits = DAG.getConstantFP(APF, dl, LogicVT); | |||
22589 | } else { | |||
22590 | // If the magnitude operand wasn't a constant, we need to AND out the sign. | |||
22591 | if (IsFakeVector) | |||
22592 | Mag = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, LogicVT, Mag); | |||
22593 | MagBits = DAG.getNode(X86ISD::FAND, dl, LogicVT, Mag, MagMask); | |||
22594 | } | |||
22595 | ||||
22596 | // OR the magnitude value with the sign bit. | |||
22597 | SDValue Or = DAG.getNode(X86ISD::FOR, dl, LogicVT, MagBits, SignBit); | |||
22598 | return !IsFakeVector ? Or : DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, VT, Or, | |||
22599 | DAG.getIntPtrConstant(0, dl)); | |||
22600 | } | |||
22601 | ||||
22602 | static SDValue LowerFGETSIGN(SDValue Op, SelectionDAG &DAG) { | |||
22603 | SDValue N0 = Op.getOperand(0); | |||
22604 | SDLoc dl(Op); | |||
22605 | MVT VT = Op.getSimpleValueType(); | |||
22606 | ||||
22607 | MVT OpVT = N0.getSimpleValueType(); | |||
22608 | assert((OpVT == MVT::f32 || OpVT == MVT::f64) &&(static_cast <bool> ((OpVT == MVT::f32 || OpVT == MVT:: f64) && "Unexpected type for FGETSIGN") ? void (0) : __assert_fail ("(OpVT == MVT::f32 || OpVT == MVT::f64) && \"Unexpected type for FGETSIGN\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 22609, __extension__ __PRETTY_FUNCTION__)) | |||
22609 | "Unexpected type for FGETSIGN")(static_cast <bool> ((OpVT == MVT::f32 || OpVT == MVT:: f64) && "Unexpected type for FGETSIGN") ? void (0) : __assert_fail ("(OpVT == MVT::f32 || OpVT == MVT::f64) && \"Unexpected type for FGETSIGN\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 22609, __extension__ __PRETTY_FUNCTION__)); | |||
22610 | ||||
22611 | // Lower ISD::FGETSIGN to (AND (X86ISD::MOVMSK ...) 1). | |||
22612 | MVT VecVT = (OpVT == MVT::f32 ? MVT::v4f32 : MVT::v2f64); | |||
22613 | SDValue Res = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VecVT, N0); | |||
22614 | Res = DAG.getNode(X86ISD::MOVMSK, dl, MVT::i32, Res); | |||
22615 | Res = DAG.getZExtOrTrunc(Res, dl, VT); | |||
22616 | Res = DAG.getNode(ISD::AND, dl, VT, Res, DAG.getConstant(1, dl, VT)); | |||
22617 | return Res; | |||
22618 | } | |||
22619 | ||||
22620 | static SDValue lowerISNAN(SDValue Op, SelectionDAG &DAG) { | |||
22621 | SDLoc DL(Op); | |||
22622 | SDValue Arg = Op.getOperand(0); | |||
22623 | MVT ArgVT = Arg.getSimpleValueType(); | |||
22624 | MVT ResultVT = Op.getSimpleValueType(); | |||
22625 | ||||
22626 | // If exceptions are ignored, use unordered comparison for fp80. It recognizes | |||
22627 | // unsupported values as NaNs. | |||
22628 | if (ArgVT == MVT::f80 && Op->getFlags().hasNoFPExcept()) | |||
22629 | return DAG.getSetCC(DL, ResultVT, Arg, Arg, ISD::CondCode::SETUNE); | |||
22630 | ||||
22631 | // Determine classification of argument using instruction FXAM. | |||
22632 | unsigned Opc; | |||
22633 | switch (ArgVT.SimpleTy) { | |||
22634 | default: | |||
22635 | llvm_unreachable("Unexpected type!")::llvm::llvm_unreachable_internal("Unexpected type!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 22635); | |||
22636 | case MVT::f32: | |||
22637 | Opc = X86::XAM_Fp32; | |||
22638 | break; | |||
22639 | case MVT::f64: | |||
22640 | Opc = X86::XAM_Fp64; | |||
22641 | break; | |||
22642 | case MVT::f80: | |||
22643 | Opc = X86::XAM_Fp80; | |||
22644 | break; | |||
22645 | } | |||
22646 | SDValue Test(DAG.getMachineNode(Opc, DL, MVT::Glue, Arg), 0); | |||
22647 | ||||
22648 | // Move FPSW to AX. | |||
22649 | SDValue FNSTSW = | |||
22650 | SDValue(DAG.getMachineNode(X86::FNSTSW16r, DL, MVT::i16, Test), 0); | |||
22651 | ||||
22652 | // Extract upper 8-bits of AX. | |||
22653 | SDValue Extract = | |||
22654 | DAG.getTargetExtractSubreg(X86::sub_8bit_hi, DL, MVT::i8, FNSTSW); | |||
22655 | ||||
22656 | // Mask all bits but C3, C2, C0. | |||
22657 | Extract = DAG.getNode(ISD::AND, DL, MVT::i8, Extract, | |||
22658 | DAG.getConstant(0x45, DL, MVT::i8)); | |||
22659 | ||||
22660 | return DAG.getSetCC(DL, ResultVT, Extract, DAG.getConstant(1, DL, MVT::i8), | |||
22661 | ISD::CondCode::SETLE); | |||
22662 | } | |||
22663 | ||||
22664 | /// Helper for creating a X86ISD::SETCC node. | |||
22665 | static SDValue getSETCC(X86::CondCode Cond, SDValue EFLAGS, const SDLoc &dl, | |||
22666 | SelectionDAG &DAG) { | |||
22667 | return DAG.getNode(X86ISD::SETCC, dl, MVT::i8, | |||
22668 | DAG.getTargetConstant(Cond, dl, MVT::i8), EFLAGS); | |||
22669 | } | |||
22670 | ||||
22671 | /// Helper for matching OR(EXTRACTELT(X,0),OR(EXTRACTELT(X,1),...)) | |||
22672 | /// style scalarized (associative) reduction patterns. Partial reductions | |||
22673 | /// are supported when the pointer SrcMask is non-null. | |||
22674 | /// TODO - move this to SelectionDAG? | |||
22675 | static bool matchScalarReduction(SDValue Op, ISD::NodeType BinOp, | |||
22676 | SmallVectorImpl<SDValue> &SrcOps, | |||
22677 | SmallVectorImpl<APInt> *SrcMask = nullptr) { | |||
22678 | SmallVector<SDValue, 8> Opnds; | |||
22679 | DenseMap<SDValue, APInt> SrcOpMap; | |||
22680 | EVT VT = MVT::Other; | |||
22681 | ||||
22682 | // Recognize a special case where a vector is casted into wide integer to | |||
22683 | // test all 0s. | |||
22684 | assert(Op.getOpcode() == unsigned(BinOp) &&(static_cast <bool> (Op.getOpcode() == unsigned(BinOp) && "Unexpected bit reduction opcode") ? void (0) : __assert_fail ("Op.getOpcode() == unsigned(BinOp) && \"Unexpected bit reduction opcode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 22685, __extension__ __PRETTY_FUNCTION__)) | |||
22685 | "Unexpected bit reduction opcode")(static_cast <bool> (Op.getOpcode() == unsigned(BinOp) && "Unexpected bit reduction opcode") ? void (0) : __assert_fail ("Op.getOpcode() == unsigned(BinOp) && \"Unexpected bit reduction opcode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 22685, __extension__ __PRETTY_FUNCTION__)); | |||
22686 | Opnds.push_back(Op.getOperand(0)); | |||
22687 | Opnds.push_back(Op.getOperand(1)); | |||
22688 | ||||
22689 | for (unsigned Slot = 0, e = Opnds.size(); Slot < e; ++Slot) { | |||
22690 | SmallVectorImpl<SDValue>::const_iterator I = Opnds.begin() + Slot; | |||
22691 | // BFS traverse all BinOp operands. | |||
22692 | if (I->getOpcode() == unsigned(BinOp)) { | |||
22693 | Opnds.push_back(I->getOperand(0)); | |||
22694 | Opnds.push_back(I->getOperand(1)); | |||
22695 | // Re-evaluate the number of nodes to be traversed. | |||
22696 | e += 2; // 2 more nodes (LHS and RHS) are pushed. | |||
22697 | continue; | |||
22698 | } | |||
22699 | ||||
22700 | // Quit if a non-EXTRACT_VECTOR_ELT | |||
22701 | if (I->getOpcode() != ISD::EXTRACT_VECTOR_ELT) | |||
22702 | return false; | |||
22703 | ||||
22704 | // Quit if without a constant index. | |||
22705 | auto *Idx = dyn_cast<ConstantSDNode>(I->getOperand(1)); | |||
22706 | if (!Idx) | |||
22707 | return false; | |||
22708 | ||||
22709 | SDValue Src = I->getOperand(0); | |||
22710 | DenseMap<SDValue, APInt>::iterator M = SrcOpMap.find(Src); | |||
22711 | if (M == SrcOpMap.end()) { | |||
22712 | VT = Src.getValueType(); | |||
22713 | // Quit if not the same type. | |||
22714 | if (!SrcOpMap.empty() && VT != SrcOpMap.begin()->first.getValueType()) | |||
22715 | return false; | |||
22716 | unsigned NumElts = VT.getVectorNumElements(); | |||
22717 | APInt EltCount = APInt::getNullValue(NumElts); | |||
22718 | M = SrcOpMap.insert(std::make_pair(Src, EltCount)).first; | |||
22719 | SrcOps.push_back(Src); | |||
22720 | } | |||
22721 | ||||
22722 | // Quit if element already used. | |||
22723 | unsigned CIdx = Idx->getZExtValue(); | |||
22724 | if (M->second[CIdx]) | |||
22725 | return false; | |||
22726 | M->second.setBit(CIdx); | |||
22727 | } | |||
22728 | ||||
22729 | if (SrcMask) { | |||
22730 | // Collect the source partial masks. | |||
22731 | for (SDValue &SrcOp : SrcOps) | |||
22732 | SrcMask->push_back(SrcOpMap[SrcOp]); | |||
22733 | } else { | |||
22734 | // Quit if not all elements are used. | |||
22735 | for (const auto &I : SrcOpMap) | |||
22736 | if (!I.second.isAllOnesValue()) | |||
22737 | return false; | |||
22738 | } | |||
22739 | ||||
22740 | return true; | |||
22741 | } | |||
22742 | ||||
22743 | // Helper function for comparing all bits of a vector against zero. | |||
22744 | static SDValue LowerVectorAllZero(const SDLoc &DL, SDValue V, ISD::CondCode CC, | |||
22745 | const APInt &Mask, | |||
22746 | const X86Subtarget &Subtarget, | |||
22747 | SelectionDAG &DAG, X86::CondCode &X86CC) { | |||
22748 | EVT VT = V.getValueType(); | |||
22749 | unsigned ScalarSize = VT.getScalarSizeInBits(); | |||
22750 | if (Mask.getBitWidth() != ScalarSize) { | |||
22751 | assert(ScalarSize == 1 && "Element Mask vs Vector bitwidth mismatch")(static_cast <bool> (ScalarSize == 1 && "Element Mask vs Vector bitwidth mismatch" ) ? void (0) : __assert_fail ("ScalarSize == 1 && \"Element Mask vs Vector bitwidth mismatch\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 22751, __extension__ __PRETTY_FUNCTION__)); | |||
22752 | return SDValue(); | |||
22753 | } | |||
22754 | ||||
22755 | assert((CC == ISD::SETEQ || CC == ISD::SETNE) && "Unsupported ISD::CondCode")(static_cast <bool> ((CC == ISD::SETEQ || CC == ISD::SETNE ) && "Unsupported ISD::CondCode") ? void (0) : __assert_fail ("(CC == ISD::SETEQ || CC == ISD::SETNE) && \"Unsupported ISD::CondCode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 22755, __extension__ __PRETTY_FUNCTION__)); | |||
22756 | X86CC = (CC == ISD::SETEQ ? X86::COND_E : X86::COND_NE); | |||
22757 | ||||
22758 | auto MaskBits = [&](SDValue Src) { | |||
22759 | if (Mask.isAllOnesValue()) | |||
22760 | return Src; | |||
22761 | EVT SrcVT = Src.getValueType(); | |||
22762 | SDValue MaskValue = DAG.getConstant(Mask, DL, SrcVT); | |||
22763 | return DAG.getNode(ISD::AND, DL, SrcVT, Src, MaskValue); | |||
22764 | }; | |||
22765 | ||||
22766 | // For sub-128-bit vector, cast to (legal) integer and compare with zero. | |||
22767 | if (VT.getSizeInBits() < 128) { | |||
22768 | EVT IntVT = EVT::getIntegerVT(*DAG.getContext(), VT.getSizeInBits()); | |||
22769 | if (!DAG.getTargetLoweringInfo().isTypeLegal(IntVT)) | |||
22770 | return SDValue(); | |||
22771 | return DAG.getNode(X86ISD::CMP, DL, MVT::i32, | |||
22772 | DAG.getBitcast(IntVT, MaskBits(V)), | |||
22773 | DAG.getConstant(0, DL, IntVT)); | |||
22774 | } | |||
22775 | ||||
22776 | // Quit if not splittable to 128/256-bit vector. | |||
22777 | if (!isPowerOf2_32(VT.getSizeInBits())) | |||
22778 | return SDValue(); | |||
22779 | ||||
22780 | // Split down to 128/256-bit vector. | |||
22781 | unsigned TestSize = Subtarget.hasAVX() ? 256 : 128; | |||
22782 | while (VT.getSizeInBits() > TestSize) { | |||
22783 | auto Split = DAG.SplitVector(V, DL); | |||
22784 | VT = Split.first.getValueType(); | |||
22785 | V = DAG.getNode(ISD::OR, DL, VT, Split.first, Split.second); | |||
22786 | } | |||
22787 | ||||
22788 | bool UsePTEST = Subtarget.hasSSE41(); | |||
22789 | if (UsePTEST) { | |||
22790 | MVT TestVT = VT.is128BitVector() ? MVT::v2i64 : MVT::v4i64; | |||
22791 | V = DAG.getBitcast(TestVT, MaskBits(V)); | |||
22792 | return DAG.getNode(X86ISD::PTEST, DL, MVT::i32, V, V); | |||
22793 | } | |||
22794 | ||||
22795 | // Without PTEST, a masked v2i64 or-reduction is not faster than | |||
22796 | // scalarization. | |||
22797 | if (!Mask.isAllOnesValue() && VT.getScalarSizeInBits() > 32) | |||
22798 | return SDValue(); | |||
22799 | ||||
22800 | V = DAG.getBitcast(MVT::v16i8, MaskBits(V)); | |||
22801 | V = DAG.getNode(X86ISD::PCMPEQ, DL, MVT::v16i8, V, | |||
22802 | getZeroVector(MVT::v16i8, Subtarget, DAG, DL)); | |||
22803 | V = DAG.getNode(X86ISD::MOVMSK, DL, MVT::i32, V); | |||
22804 | return DAG.getNode(X86ISD::CMP, DL, MVT::i32, V, | |||
22805 | DAG.getConstant(0xFFFF, DL, MVT::i32)); | |||
22806 | } | |||
22807 | ||||
22808 | // Check whether an OR'd reduction tree is PTEST-able, or if we can fallback to | |||
22809 | // CMP(MOVMSK(PCMPEQB(X,0))). | |||
22810 | static SDValue MatchVectorAllZeroTest(SDValue Op, ISD::CondCode CC, | |||
22811 | const SDLoc &DL, | |||
22812 | const X86Subtarget &Subtarget, | |||
22813 | SelectionDAG &DAG, SDValue &X86CC) { | |||
22814 | assert((CC == ISD::SETEQ || CC == ISD::SETNE) && "Unsupported ISD::CondCode")(static_cast <bool> ((CC == ISD::SETEQ || CC == ISD::SETNE ) && "Unsupported ISD::CondCode") ? void (0) : __assert_fail ("(CC == ISD::SETEQ || CC == ISD::SETNE) && \"Unsupported ISD::CondCode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 22814, __extension__ __PRETTY_FUNCTION__)); | |||
22815 | ||||
22816 | if (!Subtarget.hasSSE2() || !Op->hasOneUse()) | |||
22817 | return SDValue(); | |||
22818 | ||||
22819 | // Check whether we're masking/truncating an OR-reduction result, in which | |||
22820 | // case track the masked bits. | |||
22821 | APInt Mask = APInt::getAllOnesValue(Op.getScalarValueSizeInBits()); | |||
22822 | switch (Op.getOpcode()) { | |||
22823 | case ISD::TRUNCATE: { | |||
22824 | SDValue Src = Op.getOperand(0); | |||
22825 | Mask = APInt::getLowBitsSet(Src.getScalarValueSizeInBits(), | |||
22826 | Op.getScalarValueSizeInBits()); | |||
22827 | Op = Src; | |||
22828 | break; | |||
22829 | } | |||
22830 | case ISD::AND: { | |||
22831 | if (auto *Cst = dyn_cast<ConstantSDNode>(Op.getOperand(1))) { | |||
22832 | Mask = Cst->getAPIntValue(); | |||
22833 | Op = Op.getOperand(0); | |||
22834 | } | |||
22835 | break; | |||
22836 | } | |||
22837 | } | |||
22838 | ||||
22839 | SmallVector<SDValue, 8> VecIns; | |||
22840 | if (Op.getOpcode() == ISD::OR && matchScalarReduction(Op, ISD::OR, VecIns)) { | |||
22841 | EVT VT = VecIns[0].getValueType(); | |||
22842 | assert(llvm::all_of(VecIns,(static_cast <bool> (llvm::all_of(VecIns, [VT](SDValue V ) { return VT == V.getValueType(); }) && "Reduction source vector mismatch" ) ? void (0) : __assert_fail ("llvm::all_of(VecIns, [VT](SDValue V) { return VT == V.getValueType(); }) && \"Reduction source vector mismatch\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 22844, __extension__ __PRETTY_FUNCTION__)) | |||
22843 | [VT](SDValue V) { return VT == V.getValueType(); }) &&(static_cast <bool> (llvm::all_of(VecIns, [VT](SDValue V ) { return VT == V.getValueType(); }) && "Reduction source vector mismatch" ) ? void (0) : __assert_fail ("llvm::all_of(VecIns, [VT](SDValue V) { return VT == V.getValueType(); }) && \"Reduction source vector mismatch\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 22844, __extension__ __PRETTY_FUNCTION__)) | |||
22844 | "Reduction source vector mismatch")(static_cast <bool> (llvm::all_of(VecIns, [VT](SDValue V ) { return VT == V.getValueType(); }) && "Reduction source vector mismatch" ) ? void (0) : __assert_fail ("llvm::all_of(VecIns, [VT](SDValue V) { return VT == V.getValueType(); }) && \"Reduction source vector mismatch\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 22844, __extension__ __PRETTY_FUNCTION__)); | |||
22845 | ||||
22846 | // Quit if less than 128-bits or not splittable to 128/256-bit vector. | |||
22847 | if (VT.getSizeInBits() < 128 || !isPowerOf2_32(VT.getSizeInBits())) | |||
22848 | return SDValue(); | |||
22849 | ||||
22850 | // If more than one full vector is evaluated, OR them first before PTEST. | |||
22851 | for (unsigned Slot = 0, e = VecIns.size(); e - Slot > 1; | |||
22852 | Slot += 2, e += 1) { | |||
22853 | // Each iteration will OR 2 nodes and append the result until there is | |||
22854 | // only 1 node left, i.e. the final OR'd value of all vectors. | |||
22855 | SDValue LHS = VecIns[Slot]; | |||
22856 | SDValue RHS = VecIns[Slot + 1]; | |||
22857 | VecIns.push_back(DAG.getNode(ISD::OR, DL, VT, LHS, RHS)); | |||
22858 | } | |||
22859 | ||||
22860 | X86::CondCode CCode; | |||
22861 | if (SDValue V = LowerVectorAllZero(DL, VecIns.back(), CC, Mask, Subtarget, | |||
22862 | DAG, CCode)) { | |||
22863 | X86CC = DAG.getTargetConstant(CCode, DL, MVT::i8); | |||
22864 | return V; | |||
22865 | } | |||
22866 | } | |||
22867 | ||||
22868 | if (Op.getOpcode() == ISD::EXTRACT_VECTOR_ELT) { | |||
22869 | ISD::NodeType BinOp; | |||
22870 | if (SDValue Match = | |||
22871 | DAG.matchBinOpReduction(Op.getNode(), BinOp, {ISD::OR})) { | |||
22872 | X86::CondCode CCode; | |||
22873 | if (SDValue V = | |||
22874 | LowerVectorAllZero(DL, Match, CC, Mask, Subtarget, DAG, CCode)) { | |||
22875 | X86CC = DAG.getTargetConstant(CCode, DL, MVT::i8); | |||
22876 | return V; | |||
22877 | } | |||
22878 | } | |||
22879 | } | |||
22880 | ||||
22881 | return SDValue(); | |||
22882 | } | |||
22883 | ||||
22884 | /// return true if \c Op has a use that doesn't just read flags. | |||
22885 | static bool hasNonFlagsUse(SDValue Op) { | |||
22886 | for (SDNode::use_iterator UI = Op->use_begin(), UE = Op->use_end(); UI != UE; | |||
22887 | ++UI) { | |||
22888 | SDNode *User = *UI; | |||
22889 | unsigned UOpNo = UI.getOperandNo(); | |||
22890 | if (User->getOpcode() == ISD::TRUNCATE && User->hasOneUse()) { | |||
22891 | // Look pass truncate. | |||
22892 | UOpNo = User->use_begin().getOperandNo(); | |||
22893 | User = *User->use_begin(); | |||
22894 | } | |||
22895 | ||||
22896 | if (User->getOpcode() != ISD::BRCOND && User->getOpcode() != ISD::SETCC && | |||
22897 | !(User->getOpcode() == ISD::SELECT && UOpNo == 0)) | |||
22898 | return true; | |||
22899 | } | |||
22900 | return false; | |||
22901 | } | |||
22902 | ||||
22903 | // Transform to an x86-specific ALU node with flags if there is a chance of | |||
22904 | // using an RMW op or only the flags are used. Otherwise, leave | |||
22905 | // the node alone and emit a 'cmp' or 'test' instruction. | |||
22906 | static bool isProfitableToUseFlagOp(SDValue Op) { | |||
22907 | for (SDNode *U : Op->uses()) | |||
22908 | if (U->getOpcode() != ISD::CopyToReg && | |||
22909 | U->getOpcode() != ISD::SETCC && | |||
22910 | U->getOpcode() != ISD::STORE) | |||
22911 | return false; | |||
22912 | ||||
22913 | return true; | |||
22914 | } | |||
22915 | ||||
22916 | /// Emit nodes that will be selected as "test Op0,Op0", or something | |||
22917 | /// equivalent. | |||
22918 | static SDValue EmitTest(SDValue Op, unsigned X86CC, const SDLoc &dl, | |||
22919 | SelectionDAG &DAG, const X86Subtarget &Subtarget) { | |||
22920 | // CF and OF aren't always set the way we want. Determine which | |||
22921 | // of these we need. | |||
22922 | bool NeedCF = false; | |||
22923 | bool NeedOF = false; | |||
22924 | switch (X86CC) { | |||
22925 | default: break; | |||
22926 | case X86::COND_A: case X86::COND_AE: | |||
22927 | case X86::COND_B: case X86::COND_BE: | |||
22928 | NeedCF = true; | |||
22929 | break; | |||
22930 | case X86::COND_G: case X86::COND_GE: | |||
22931 | case X86::COND_L: case X86::COND_LE: | |||
22932 | case X86::COND_O: case X86::COND_NO: { | |||
22933 | // Check if we really need to set the | |||
22934 | // Overflow flag. If NoSignedWrap is present | |||
22935 | // that is not actually needed. | |||
22936 | switch (Op->getOpcode()) { | |||
22937 | case ISD::ADD: | |||
22938 | case ISD::SUB: | |||
22939 | case ISD::MUL: | |||
22940 | case ISD::SHL: | |||
22941 | if (Op.getNode()->getFlags().hasNoSignedWrap()) | |||
22942 | break; | |||
22943 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
22944 | default: | |||
22945 | NeedOF = true; | |||
22946 | break; | |||
22947 | } | |||
22948 | break; | |||
22949 | } | |||
22950 | } | |||
22951 | // See if we can use the EFLAGS value from the operand instead of | |||
22952 | // doing a separate TEST. TEST always sets OF and CF to 0, so unless | |||
22953 | // we prove that the arithmetic won't overflow, we can't use OF or CF. | |||
22954 | if (Op.getResNo() != 0 || NeedOF || NeedCF) { | |||
22955 | // Emit a CMP with 0, which is the TEST pattern. | |||
22956 | return DAG.getNode(X86ISD::CMP, dl, MVT::i32, Op, | |||
22957 | DAG.getConstant(0, dl, Op.getValueType())); | |||
22958 | } | |||
22959 | unsigned Opcode = 0; | |||
22960 | unsigned NumOperands = 0; | |||
22961 | ||||
22962 | SDValue ArithOp = Op; | |||
22963 | ||||
22964 | // NOTICE: In the code below we use ArithOp to hold the arithmetic operation | |||
22965 | // which may be the result of a CAST. We use the variable 'Op', which is the | |||
22966 | // non-casted variable when we check for possible users. | |||
22967 | switch (ArithOp.getOpcode()) { | |||
22968 | case ISD::AND: | |||
22969 | // If the primary 'and' result isn't used, don't bother using X86ISD::AND, | |||
22970 | // because a TEST instruction will be better. | |||
22971 | if (!hasNonFlagsUse(Op)) | |||
22972 | break; | |||
22973 | ||||
22974 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
22975 | case ISD::ADD: | |||
22976 | case ISD::SUB: | |||
22977 | case ISD::OR: | |||
22978 | case ISD::XOR: | |||
22979 | if (!isProfitableToUseFlagOp(Op)) | |||
22980 | break; | |||
22981 | ||||
22982 | // Otherwise use a regular EFLAGS-setting instruction. | |||
22983 | switch (ArithOp.getOpcode()) { | |||
22984 | default: llvm_unreachable("unexpected operator!")::llvm::llvm_unreachable_internal("unexpected operator!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 22984); | |||
22985 | case ISD::ADD: Opcode = X86ISD::ADD; break; | |||
22986 | case ISD::SUB: Opcode = X86ISD::SUB; break; | |||
22987 | case ISD::XOR: Opcode = X86ISD::XOR; break; | |||
22988 | case ISD::AND: Opcode = X86ISD::AND; break; | |||
22989 | case ISD::OR: Opcode = X86ISD::OR; break; | |||
22990 | } | |||
22991 | ||||
22992 | NumOperands = 2; | |||
22993 | break; | |||
22994 | case X86ISD::ADD: | |||
22995 | case X86ISD::SUB: | |||
22996 | case X86ISD::OR: | |||
22997 | case X86ISD::XOR: | |||
22998 | case X86ISD::AND: | |||
22999 | return SDValue(Op.getNode(), 1); | |||
23000 | case ISD::SSUBO: | |||
23001 | case ISD::USUBO: { | |||
23002 | // /USUBO/SSUBO will become a X86ISD::SUB and we can use its Z flag. | |||
23003 | SDVTList VTs = DAG.getVTList(Op.getValueType(), MVT::i32); | |||
23004 | return DAG.getNode(X86ISD::SUB, dl, VTs, Op->getOperand(0), | |||
23005 | Op->getOperand(1)).getValue(1); | |||
23006 | } | |||
23007 | default: | |||
23008 | break; | |||
23009 | } | |||
23010 | ||||
23011 | if (Opcode == 0) { | |||
23012 | // Emit a CMP with 0, which is the TEST pattern. | |||
23013 | return DAG.getNode(X86ISD::CMP, dl, MVT::i32, Op, | |||
23014 | DAG.getConstant(0, dl, Op.getValueType())); | |||
23015 | } | |||
23016 | SDVTList VTs = DAG.getVTList(Op.getValueType(), MVT::i32); | |||
23017 | SmallVector<SDValue, 4> Ops(Op->op_begin(), Op->op_begin() + NumOperands); | |||
23018 | ||||
23019 | SDValue New = DAG.getNode(Opcode, dl, VTs, Ops); | |||
23020 | DAG.ReplaceAllUsesOfValueWith(SDValue(Op.getNode(), 0), New); | |||
23021 | return SDValue(New.getNode(), 1); | |||
23022 | } | |||
23023 | ||||
23024 | /// Emit nodes that will be selected as "cmp Op0,Op1", or something | |||
23025 | /// equivalent. | |||
23026 | static SDValue EmitCmp(SDValue Op0, SDValue Op1, unsigned X86CC, | |||
23027 | const SDLoc &dl, SelectionDAG &DAG, | |||
23028 | const X86Subtarget &Subtarget) { | |||
23029 | if (isNullConstant(Op1)) | |||
23030 | return EmitTest(Op0, X86CC, dl, DAG, Subtarget); | |||
23031 | ||||
23032 | EVT CmpVT = Op0.getValueType(); | |||
23033 | ||||
23034 | assert((CmpVT == MVT::i8 || CmpVT == MVT::i16 ||(static_cast <bool> ((CmpVT == MVT::i8 || CmpVT == MVT:: i16 || CmpVT == MVT::i32 || CmpVT == MVT::i64) && "Unexpected VT!" ) ? void (0) : __assert_fail ("(CmpVT == MVT::i8 || CmpVT == MVT::i16 || CmpVT == MVT::i32 || CmpVT == MVT::i64) && \"Unexpected VT!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 23035, __extension__ __PRETTY_FUNCTION__)) | |||
23035 | CmpVT == MVT::i32 || CmpVT == MVT::i64) && "Unexpected VT!")(static_cast <bool> ((CmpVT == MVT::i8 || CmpVT == MVT:: i16 || CmpVT == MVT::i32 || CmpVT == MVT::i64) && "Unexpected VT!" ) ? void (0) : __assert_fail ("(CmpVT == MVT::i8 || CmpVT == MVT::i16 || CmpVT == MVT::i32 || CmpVT == MVT::i64) && \"Unexpected VT!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 23035, __extension__ __PRETTY_FUNCTION__)); | |||
23036 | ||||
23037 | // Only promote the compare up to I32 if it is a 16 bit operation | |||
23038 | // with an immediate. 16 bit immediates are to be avoided. | |||
23039 | if (CmpVT == MVT::i16 && !Subtarget.isAtom() && | |||
23040 | !DAG.getMachineFunction().getFunction().hasMinSize()) { | |||
23041 | ConstantSDNode *COp0 = dyn_cast<ConstantSDNode>(Op0); | |||
23042 | ConstantSDNode *COp1 = dyn_cast<ConstantSDNode>(Op1); | |||
23043 | // Don't do this if the immediate can fit in 8-bits. | |||
23044 | if ((COp0 && !COp0->getAPIntValue().isSignedIntN(8)) || | |||
23045 | (COp1 && !COp1->getAPIntValue().isSignedIntN(8))) { | |||
23046 | unsigned ExtendOp = | |||
23047 | isX86CCSigned(X86CC) ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND; | |||
23048 | if (X86CC == X86::COND_E || X86CC == X86::COND_NE) { | |||
23049 | // For equality comparisons try to use SIGN_EXTEND if the input was | |||
23050 | // truncate from something with enough sign bits. | |||
23051 | if (Op0.getOpcode() == ISD::TRUNCATE) { | |||
23052 | SDValue In = Op0.getOperand(0); | |||
23053 | unsigned EffBits = | |||
23054 | In.getScalarValueSizeInBits() - DAG.ComputeNumSignBits(In) + 1; | |||
23055 | if (EffBits <= 16) | |||
23056 | ExtendOp = ISD::SIGN_EXTEND; | |||
23057 | } else if (Op1.getOpcode() == ISD::TRUNCATE) { | |||
23058 | SDValue In = Op1.getOperand(0); | |||
23059 | unsigned EffBits = | |||
23060 | In.getScalarValueSizeInBits() - DAG.ComputeNumSignBits(In) + 1; | |||
23061 | if (EffBits <= 16) | |||
23062 | ExtendOp = ISD::SIGN_EXTEND; | |||
23063 | } | |||
23064 | } | |||
23065 | ||||
23066 | CmpVT = MVT::i32; | |||
23067 | Op0 = DAG.getNode(ExtendOp, dl, CmpVT, Op0); | |||
23068 | Op1 = DAG.getNode(ExtendOp, dl, CmpVT, Op1); | |||
23069 | } | |||
23070 | } | |||
23071 | ||||
23072 | // Try to shrink i64 compares if the input has enough zero bits. | |||
23073 | // FIXME: Do this for non-constant compares for constant on LHS? | |||
23074 | if (CmpVT == MVT::i64 && isa<ConstantSDNode>(Op1) && !isX86CCSigned(X86CC) && | |||
23075 | Op0.hasOneUse() && // Hacky way to not break CSE opportunities with sub. | |||
23076 | cast<ConstantSDNode>(Op1)->getAPIntValue().getActiveBits() <= 32 && | |||
23077 | DAG.MaskedValueIsZero(Op0, APInt::getHighBitsSet(64, 32))) { | |||
23078 | CmpVT = MVT::i32; | |||
23079 | Op0 = DAG.getNode(ISD::TRUNCATE, dl, CmpVT, Op0); | |||
23080 | Op1 = DAG.getNode(ISD::TRUNCATE, dl, CmpVT, Op1); | |||
23081 | } | |||
23082 | ||||
23083 | // 0-x == y --> x+y == 0 | |||
23084 | // 0-x != y --> x+y != 0 | |||
23085 | if (Op0.getOpcode() == ISD::SUB && isNullConstant(Op0.getOperand(0)) && | |||
23086 | Op0.hasOneUse() && (X86CC == X86::COND_E || X86CC == X86::COND_NE)) { | |||
23087 | SDVTList VTs = DAG.getVTList(CmpVT, MVT::i32); | |||
23088 | SDValue Add = DAG.getNode(X86ISD::ADD, dl, VTs, Op0.getOperand(1), Op1); | |||
23089 | return Add.getValue(1); | |||
23090 | } | |||
23091 | ||||
23092 | // x == 0-y --> x+y == 0 | |||
23093 | // x != 0-y --> x+y != 0 | |||
23094 | if (Op1.getOpcode() == ISD::SUB && isNullConstant(Op1.getOperand(0)) && | |||
23095 | Op1.hasOneUse() && (X86CC == X86::COND_E || X86CC == X86::COND_NE)) { | |||
23096 | SDVTList VTs = DAG.getVTList(CmpVT, MVT::i32); | |||
23097 | SDValue Add = DAG.getNode(X86ISD::ADD, dl, VTs, Op0, Op1.getOperand(1)); | |||
23098 | return Add.getValue(1); | |||
23099 | } | |||
23100 | ||||
23101 | // Use SUB instead of CMP to enable CSE between SUB and CMP. | |||
23102 | SDVTList VTs = DAG.getVTList(CmpVT, MVT::i32); | |||
23103 | SDValue Sub = DAG.getNode(X86ISD::SUB, dl, VTs, Op0, Op1); | |||
23104 | return Sub.getValue(1); | |||
23105 | } | |||
23106 | ||||
23107 | /// Check if replacement of SQRT with RSQRT should be disabled. | |||
23108 | bool X86TargetLowering::isFsqrtCheap(SDValue Op, SelectionDAG &DAG) const { | |||
23109 | EVT VT = Op.getValueType(); | |||
23110 | ||||
23111 | // We never want to use both SQRT and RSQRT instructions for the same input. | |||
23112 | if (DAG.getNodeIfExists(X86ISD::FRSQRT, DAG.getVTList(VT), Op)) | |||
23113 | return false; | |||
23114 | ||||
23115 | if (VT.isVector()) | |||
23116 | return Subtarget.hasFastVectorFSQRT(); | |||
23117 | return Subtarget.hasFastScalarFSQRT(); | |||
23118 | } | |||
23119 | ||||
23120 | /// The minimum architected relative accuracy is 2^-12. We need one | |||
23121 | /// Newton-Raphson step to have a good float result (24 bits of precision). | |||
23122 | SDValue X86TargetLowering::getSqrtEstimate(SDValue Op, | |||
23123 | SelectionDAG &DAG, int Enabled, | |||
23124 | int &RefinementSteps, | |||
23125 | bool &UseOneConstNR, | |||
23126 | bool Reciprocal) const { | |||
23127 | EVT VT = Op.getValueType(); | |||
23128 | ||||
23129 | // SSE1 has rsqrtss and rsqrtps. AVX adds a 256-bit variant for rsqrtps. | |||
23130 | // It is likely not profitable to do this for f64 because a double-precision | |||
23131 | // rsqrt estimate with refinement on x86 prior to FMA requires at least 16 | |||
23132 | // instructions: convert to single, rsqrtss, convert back to double, refine | |||
23133 | // (3 steps = at least 13 insts). If an 'rsqrtsd' variant was added to the ISA | |||
23134 | // along with FMA, this could be a throughput win. | |||
23135 | // TODO: SQRT requires SSE2 to prevent the introduction of an illegal v4i32 | |||
23136 | // after legalize types. | |||
23137 | if ((VT == MVT::f32 && Subtarget.hasSSE1()) || | |||
23138 | (VT == MVT::v4f32 && Subtarget.hasSSE1() && Reciprocal) || | |||
23139 | (VT == MVT::v4f32 && Subtarget.hasSSE2() && !Reciprocal) || | |||
23140 | (VT == MVT::v8f32 && Subtarget.hasAVX()) || | |||
23141 | (VT == MVT::v16f32 && Subtarget.useAVX512Regs())) { | |||
23142 | if (RefinementSteps == ReciprocalEstimate::Unspecified) | |||
23143 | RefinementSteps = 1; | |||
23144 | ||||
23145 | UseOneConstNR = false; | |||
23146 | // There is no FSQRT for 512-bits, but there is RSQRT14. | |||
23147 | unsigned Opcode = VT == MVT::v16f32 ? X86ISD::RSQRT14 : X86ISD::FRSQRT; | |||
23148 | return DAG.getNode(Opcode, SDLoc(Op), VT, Op); | |||
23149 | } | |||
23150 | return SDValue(); | |||
23151 | } | |||
23152 | ||||
23153 | /// The minimum architected relative accuracy is 2^-12. We need one | |||
23154 | /// Newton-Raphson step to have a good float result (24 bits of precision). | |||
23155 | SDValue X86TargetLowering::getRecipEstimate(SDValue Op, SelectionDAG &DAG, | |||
23156 | int Enabled, | |||
23157 | int &RefinementSteps) const { | |||
23158 | EVT VT = Op.getValueType(); | |||
23159 | ||||
23160 | // SSE1 has rcpss and rcpps. AVX adds a 256-bit variant for rcpps. | |||
23161 | // It is likely not profitable to do this for f64 because a double-precision | |||
23162 | // reciprocal estimate with refinement on x86 prior to FMA requires | |||
23163 | // 15 instructions: convert to single, rcpss, convert back to double, refine | |||
23164 | // (3 steps = 12 insts). If an 'rcpsd' variant was added to the ISA | |||
23165 | // along with FMA, this could be a throughput win. | |||
23166 | ||||
23167 | if ((VT == MVT::f32 && Subtarget.hasSSE1()) || | |||
23168 | (VT == MVT::v4f32 && Subtarget.hasSSE1()) || | |||
23169 | (VT == MVT::v8f32 && Subtarget.hasAVX()) || | |||
23170 | (VT == MVT::v16f32 && Subtarget.useAVX512Regs())) { | |||
23171 | // Enable estimate codegen with 1 refinement step for vector division. | |||
23172 | // Scalar division estimates are disabled because they break too much | |||
23173 | // real-world code. These defaults are intended to match GCC behavior. | |||
23174 | if (VT == MVT::f32 && Enabled == ReciprocalEstimate::Unspecified) | |||
23175 | return SDValue(); | |||
23176 | ||||
23177 | if (RefinementSteps == ReciprocalEstimate::Unspecified) | |||
23178 | RefinementSteps = 1; | |||
23179 | ||||
23180 | // There is no FSQRT for 512-bits, but there is RCP14. | |||
23181 | unsigned Opcode = VT == MVT::v16f32 ? X86ISD::RCP14 : X86ISD::FRCP; | |||
23182 | return DAG.getNode(Opcode, SDLoc(Op), VT, Op); | |||
23183 | } | |||
23184 | return SDValue(); | |||
23185 | } | |||
23186 | ||||
23187 | /// If we have at least two divisions that use the same divisor, convert to | |||
23188 | /// multiplication by a reciprocal. This may need to be adjusted for a given | |||
23189 | /// CPU if a division's cost is not at least twice the cost of a multiplication. | |||
23190 | /// This is because we still need one division to calculate the reciprocal and | |||
23191 | /// then we need two multiplies by that reciprocal as replacements for the | |||
23192 | /// original divisions. | |||
23193 | unsigned X86TargetLowering::combineRepeatedFPDivisors() const { | |||
23194 | return 2; | |||
23195 | } | |||
23196 | ||||
23197 | SDValue | |||
23198 | X86TargetLowering::BuildSDIVPow2(SDNode *N, const APInt &Divisor, | |||
23199 | SelectionDAG &DAG, | |||
23200 | SmallVectorImpl<SDNode *> &Created) const { | |||
23201 | AttributeList Attr = DAG.getMachineFunction().getFunction().getAttributes(); | |||
23202 | if (isIntDivCheap(N->getValueType(0), Attr)) | |||
23203 | return SDValue(N,0); // Lower SDIV as SDIV | |||
23204 | ||||
23205 | assert((Divisor.isPowerOf2() || (-Divisor).isPowerOf2()) &&(static_cast <bool> ((Divisor.isPowerOf2() || (-Divisor ).isPowerOf2()) && "Unexpected divisor!") ? void (0) : __assert_fail ("(Divisor.isPowerOf2() || (-Divisor).isPowerOf2()) && \"Unexpected divisor!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 23206, __extension__ __PRETTY_FUNCTION__)) | |||
23206 | "Unexpected divisor!")(static_cast <bool> ((Divisor.isPowerOf2() || (-Divisor ).isPowerOf2()) && "Unexpected divisor!") ? void (0) : __assert_fail ("(Divisor.isPowerOf2() || (-Divisor).isPowerOf2()) && \"Unexpected divisor!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 23206, __extension__ __PRETTY_FUNCTION__)); | |||
23207 | ||||
23208 | // Only perform this transform if CMOV is supported otherwise the select | |||
23209 | // below will become a branch. | |||
23210 | if (!Subtarget.hasCMov()) | |||
23211 | return SDValue(); | |||
23212 | ||||
23213 | // fold (sdiv X, pow2) | |||
23214 | EVT VT = N->getValueType(0); | |||
23215 | // FIXME: Support i8. | |||
23216 | if (VT != MVT::i16 && VT != MVT::i32 && | |||
23217 | !(Subtarget.is64Bit() && VT == MVT::i64)) | |||
23218 | return SDValue(); | |||
23219 | ||||
23220 | unsigned Lg2 = Divisor.countTrailingZeros(); | |||
23221 | ||||
23222 | // If the divisor is 2 or -2, the default expansion is better. | |||
23223 | if (Lg2 == 1) | |||
23224 | return SDValue(); | |||
23225 | ||||
23226 | SDLoc DL(N); | |||
23227 | SDValue N0 = N->getOperand(0); | |||
23228 | SDValue Zero = DAG.getConstant(0, DL, VT); | |||
23229 | APInt Lg2Mask = APInt::getLowBitsSet(VT.getSizeInBits(), Lg2); | |||
23230 | SDValue Pow2MinusOne = DAG.getConstant(Lg2Mask, DL, VT); | |||
23231 | ||||
23232 | // If N0 is negative, we need to add (Pow2 - 1) to it before shifting right. | |||
23233 | SDValue Cmp = DAG.getSetCC(DL, MVT::i8, N0, Zero, ISD::SETLT); | |||
23234 | SDValue Add = DAG.getNode(ISD::ADD, DL, VT, N0, Pow2MinusOne); | |||
23235 | SDValue CMov = DAG.getNode(ISD::SELECT, DL, VT, Cmp, Add, N0); | |||
23236 | ||||
23237 | Created.push_back(Cmp.getNode()); | |||
23238 | Created.push_back(Add.getNode()); | |||
23239 | Created.push_back(CMov.getNode()); | |||
23240 | ||||
23241 | // Divide by pow2. | |||
23242 | SDValue SRA = | |||
23243 | DAG.getNode(ISD::SRA, DL, VT, CMov, DAG.getConstant(Lg2, DL, MVT::i8)); | |||
23244 | ||||
23245 | // If we're dividing by a positive value, we're done. Otherwise, we must | |||
23246 | // negate the result. | |||
23247 | if (Divisor.isNonNegative()) | |||
23248 | return SRA; | |||
23249 | ||||
23250 | Created.push_back(SRA.getNode()); | |||
23251 | return DAG.getNode(ISD::SUB, DL, VT, Zero, SRA); | |||
23252 | } | |||
23253 | ||||
23254 | /// Result of 'and' is compared against zero. Change to a BT node if possible. | |||
23255 | /// Returns the BT node and the condition code needed to use it. | |||
23256 | static SDValue LowerAndToBT(SDValue And, ISD::CondCode CC, | |||
23257 | const SDLoc &dl, SelectionDAG &DAG, | |||
23258 | SDValue &X86CC) { | |||
23259 | assert(And.getOpcode() == ISD::AND && "Expected AND node!")(static_cast <bool> (And.getOpcode() == ISD::AND && "Expected AND node!") ? void (0) : __assert_fail ("And.getOpcode() == ISD::AND && \"Expected AND node!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 23259, __extension__ __PRETTY_FUNCTION__)); | |||
23260 | SDValue Op0 = And.getOperand(0); | |||
23261 | SDValue Op1 = And.getOperand(1); | |||
23262 | if (Op0.getOpcode() == ISD::TRUNCATE) | |||
23263 | Op0 = Op0.getOperand(0); | |||
23264 | if (Op1.getOpcode() == ISD::TRUNCATE) | |||
23265 | Op1 = Op1.getOperand(0); | |||
23266 | ||||
23267 | SDValue Src, BitNo; | |||
23268 | if (Op1.getOpcode() == ISD::SHL) | |||
23269 | std::swap(Op0, Op1); | |||
23270 | if (Op0.getOpcode() == ISD::SHL) { | |||
23271 | if (isOneConstant(Op0.getOperand(0))) { | |||
23272 | // If we looked past a truncate, check that it's only truncating away | |||
23273 | // known zeros. | |||
23274 | unsigned BitWidth = Op0.getValueSizeInBits(); | |||
23275 | unsigned AndBitWidth = And.getValueSizeInBits(); | |||
23276 | if (BitWidth > AndBitWidth) { | |||
23277 | KnownBits Known = DAG.computeKnownBits(Op0); | |||
23278 | if (Known.countMinLeadingZeros() < BitWidth - AndBitWidth) | |||
23279 | return SDValue(); | |||
23280 | } | |||
23281 | Src = Op1; | |||
23282 | BitNo = Op0.getOperand(1); | |||
23283 | } | |||
23284 | } else if (Op1.getOpcode() == ISD::Constant) { | |||
23285 | ConstantSDNode *AndRHS = cast<ConstantSDNode>(Op1); | |||
23286 | uint64_t AndRHSVal = AndRHS->getZExtValue(); | |||
23287 | SDValue AndLHS = Op0; | |||
23288 | ||||
23289 | if (AndRHSVal == 1 && AndLHS.getOpcode() == ISD::SRL) { | |||
23290 | Src = AndLHS.getOperand(0); | |||
23291 | BitNo = AndLHS.getOperand(1); | |||
23292 | } else { | |||
23293 | // Use BT if the immediate can't be encoded in a TEST instruction or we | |||
23294 | // are optimizing for size and the immedaite won't fit in a byte. | |||
23295 | bool OptForSize = DAG.shouldOptForSize(); | |||
23296 | if ((!isUInt<32>(AndRHSVal) || (OptForSize && !isUInt<8>(AndRHSVal))) && | |||
23297 | isPowerOf2_64(AndRHSVal)) { | |||
23298 | Src = AndLHS; | |||
23299 | BitNo = DAG.getConstant(Log2_64_Ceil(AndRHSVal), dl, | |||
23300 | Src.getValueType()); | |||
23301 | } | |||
23302 | } | |||
23303 | } | |||
23304 | ||||
23305 | // No patterns found, give up. | |||
23306 | if (!Src.getNode()) | |||
23307 | return SDValue(); | |||
23308 | ||||
23309 | // If Src is i8, promote it to i32 with any_extend. There is no i8 BT | |||
23310 | // instruction. Since the shift amount is in-range-or-undefined, we know | |||
23311 | // that doing a bittest on the i32 value is ok. We extend to i32 because | |||
23312 | // the encoding for the i16 version is larger than the i32 version. | |||
23313 | // Also promote i16 to i32 for performance / code size reason. | |||
23314 | if (Src.getValueType() == MVT::i8 || Src.getValueType() == MVT::i16) | |||
23315 | Src = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, Src); | |||
23316 | ||||
23317 | // See if we can use the 32-bit instruction instead of the 64-bit one for a | |||
23318 | // shorter encoding. Since the former takes the modulo 32 of BitNo and the | |||
23319 | // latter takes the modulo 64, this is only valid if the 5th bit of BitNo is | |||
23320 | // known to be zero. | |||
23321 | if (Src.getValueType() == MVT::i64 && | |||
23322 | DAG.MaskedValueIsZero(BitNo, APInt(BitNo.getValueSizeInBits(), 32))) | |||
23323 | Src = DAG.getNode(ISD::TRUNCATE, dl, MVT::i32, Src); | |||
23324 | ||||
23325 | // If the operand types disagree, extend the shift amount to match. Since | |||
23326 | // BT ignores high bits (like shifts) we can use anyextend. | |||
23327 | if (Src.getValueType() != BitNo.getValueType()) | |||
23328 | BitNo = DAG.getNode(ISD::ANY_EXTEND, dl, Src.getValueType(), BitNo); | |||
23329 | ||||
23330 | X86CC = DAG.getTargetConstant(CC == ISD::SETEQ ? X86::COND_AE : X86::COND_B, | |||
23331 | dl, MVT::i8); | |||
23332 | return DAG.getNode(X86ISD::BT, dl, MVT::i32, Src, BitNo); | |||
23333 | } | |||
23334 | ||||
23335 | /// Turns an ISD::CondCode into a value suitable for SSE floating-point mask | |||
23336 | /// CMPs. | |||
23337 | static unsigned translateX86FSETCC(ISD::CondCode SetCCOpcode, SDValue &Op0, | |||
23338 | SDValue &Op1, bool &IsAlwaysSignaling) { | |||
23339 | unsigned SSECC; | |||
23340 | bool Swap = false; | |||
23341 | ||||
23342 | // SSE Condition code mapping: | |||
23343 | // 0 - EQ | |||
23344 | // 1 - LT | |||
23345 | // 2 - LE | |||
23346 | // 3 - UNORD | |||
23347 | // 4 - NEQ | |||
23348 | // 5 - NLT | |||
23349 | // 6 - NLE | |||
23350 | // 7 - ORD | |||
23351 | switch (SetCCOpcode) { | |||
23352 | default: llvm_unreachable("Unexpected SETCC condition")::llvm::llvm_unreachable_internal("Unexpected SETCC condition" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 23352); | |||
23353 | case ISD::SETOEQ: | |||
23354 | case ISD::SETEQ: SSECC = 0; break; | |||
23355 | case ISD::SETOGT: | |||
23356 | case ISD::SETGT: Swap = true; LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
23357 | case ISD::SETLT: | |||
23358 | case ISD::SETOLT: SSECC = 1; break; | |||
23359 | case ISD::SETOGE: | |||
23360 | case ISD::SETGE: Swap = true; LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
23361 | case ISD::SETLE: | |||
23362 | case ISD::SETOLE: SSECC = 2; break; | |||
23363 | case ISD::SETUO: SSECC = 3; break; | |||
23364 | case ISD::SETUNE: | |||
23365 | case ISD::SETNE: SSECC = 4; break; | |||
23366 | case ISD::SETULE: Swap = true; LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
23367 | case ISD::SETUGE: SSECC = 5; break; | |||
23368 | case ISD::SETULT: Swap = true; LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
23369 | case ISD::SETUGT: SSECC = 6; break; | |||
23370 | case ISD::SETO: SSECC = 7; break; | |||
23371 | case ISD::SETUEQ: SSECC = 8; break; | |||
23372 | case ISD::SETONE: SSECC = 12; break; | |||
23373 | } | |||
23374 | if (Swap) | |||
23375 | std::swap(Op0, Op1); | |||
23376 | ||||
23377 | switch (SetCCOpcode) { | |||
23378 | default: | |||
23379 | IsAlwaysSignaling = true; | |||
23380 | break; | |||
23381 | case ISD::SETEQ: | |||
23382 | case ISD::SETOEQ: | |||
23383 | case ISD::SETUEQ: | |||
23384 | case ISD::SETNE: | |||
23385 | case ISD::SETONE: | |||
23386 | case ISD::SETUNE: | |||
23387 | case ISD::SETO: | |||
23388 | case ISD::SETUO: | |||
23389 | IsAlwaysSignaling = false; | |||
23390 | break; | |||
23391 | } | |||
23392 | ||||
23393 | return SSECC; | |||
23394 | } | |||
23395 | ||||
23396 | /// Break a VSETCC 256-bit integer VSETCC into two new 128 ones and then | |||
23397 | /// concatenate the result back. | |||
23398 | static SDValue splitIntVSETCC(EVT VT, SDValue LHS, SDValue RHS, | |||
23399 | ISD::CondCode Cond, SelectionDAG &DAG, | |||
23400 | const SDLoc &dl) { | |||
23401 | assert(VT.isInteger() && VT == LHS.getValueType() &&(static_cast <bool> (VT.isInteger() && VT == LHS .getValueType() && VT == RHS.getValueType() && "Unsupported VTs!") ? void (0) : __assert_fail ("VT.isInteger() && VT == LHS.getValueType() && VT == RHS.getValueType() && \"Unsupported VTs!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 23402, __extension__ __PRETTY_FUNCTION__)) | |||
23402 | VT == RHS.getValueType() && "Unsupported VTs!")(static_cast <bool> (VT.isInteger() && VT == LHS .getValueType() && VT == RHS.getValueType() && "Unsupported VTs!") ? void (0) : __assert_fail ("VT.isInteger() && VT == LHS.getValueType() && VT == RHS.getValueType() && \"Unsupported VTs!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 23402, __extension__ __PRETTY_FUNCTION__)); | |||
23403 | ||||
23404 | SDValue CC = DAG.getCondCode(Cond); | |||
23405 | ||||
23406 | // Extract the LHS Lo/Hi vectors | |||
23407 | SDValue LHS1, LHS2; | |||
23408 | std::tie(LHS1, LHS2) = splitVector(LHS, DAG, dl); | |||
23409 | ||||
23410 | // Extract the RHS Lo/Hi vectors | |||
23411 | SDValue RHS1, RHS2; | |||
23412 | std::tie(RHS1, RHS2) = splitVector(RHS, DAG, dl); | |||
23413 | ||||
23414 | // Issue the operation on the smaller types and concatenate the result back | |||
23415 | EVT LoVT, HiVT; | |||
23416 | std::tie(LoVT, HiVT) = DAG.GetSplitDestVTs(VT); | |||
23417 | return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, | |||
23418 | DAG.getNode(ISD::SETCC, dl, LoVT, LHS1, RHS1, CC), | |||
23419 | DAG.getNode(ISD::SETCC, dl, HiVT, LHS2, RHS2, CC)); | |||
23420 | } | |||
23421 | ||||
23422 | static SDValue LowerIntVSETCC_AVX512(SDValue Op, SelectionDAG &DAG) { | |||
23423 | ||||
23424 | SDValue Op0 = Op.getOperand(0); | |||
23425 | SDValue Op1 = Op.getOperand(1); | |||
23426 | SDValue CC = Op.getOperand(2); | |||
23427 | MVT VT = Op.getSimpleValueType(); | |||
23428 | SDLoc dl(Op); | |||
23429 | ||||
23430 | assert(VT.getVectorElementType() == MVT::i1 &&(static_cast <bool> (VT.getVectorElementType() == MVT:: i1 && "Cannot set masked compare for this operation") ? void (0) : __assert_fail ("VT.getVectorElementType() == MVT::i1 && \"Cannot set masked compare for this operation\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 23431, __extension__ __PRETTY_FUNCTION__)) | |||
23431 | "Cannot set masked compare for this operation")(static_cast <bool> (VT.getVectorElementType() == MVT:: i1 && "Cannot set masked compare for this operation") ? void (0) : __assert_fail ("VT.getVectorElementType() == MVT::i1 && \"Cannot set masked compare for this operation\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 23431, __extension__ __PRETTY_FUNCTION__)); | |||
23432 | ||||
23433 | ISD::CondCode SetCCOpcode = cast<CondCodeSDNode>(CC)->get(); | |||
23434 | ||||
23435 | // Prefer SETGT over SETLT. | |||
23436 | if (SetCCOpcode == ISD::SETLT) { | |||
23437 | SetCCOpcode = ISD::getSetCCSwappedOperands(SetCCOpcode); | |||
23438 | std::swap(Op0, Op1); | |||
23439 | } | |||
23440 | ||||
23441 | return DAG.getSetCC(dl, VT, Op0, Op1, SetCCOpcode); | |||
23442 | } | |||
23443 | ||||
23444 | /// Given a buildvector constant, return a new vector constant with each element | |||
23445 | /// incremented or decremented. If incrementing or decrementing would result in | |||
23446 | /// unsigned overflow or underflow or this is not a simple vector constant, | |||
23447 | /// return an empty value. | |||
23448 | static SDValue incDecVectorConstant(SDValue V, SelectionDAG &DAG, bool IsInc) { | |||
23449 | auto *BV = dyn_cast<BuildVectorSDNode>(V.getNode()); | |||
23450 | if (!BV) | |||
23451 | return SDValue(); | |||
23452 | ||||
23453 | MVT VT = V.getSimpleValueType(); | |||
23454 | MVT EltVT = VT.getVectorElementType(); | |||
23455 | unsigned NumElts = VT.getVectorNumElements(); | |||
23456 | SmallVector<SDValue, 8> NewVecC; | |||
23457 | SDLoc DL(V); | |||
23458 | for (unsigned i = 0; i < NumElts; ++i) { | |||
23459 | auto *Elt = dyn_cast<ConstantSDNode>(BV->getOperand(i)); | |||
23460 | if (!Elt || Elt->isOpaque() || Elt->getSimpleValueType(0) != EltVT) | |||
23461 | return SDValue(); | |||
23462 | ||||
23463 | // Avoid overflow/underflow. | |||
23464 | const APInt &EltC = Elt->getAPIntValue(); | |||
23465 | if ((IsInc && EltC.isMaxValue()) || (!IsInc && EltC.isNullValue())) | |||
23466 | return SDValue(); | |||
23467 | ||||
23468 | NewVecC.push_back(DAG.getConstant(EltC + (IsInc ? 1 : -1), DL, EltVT)); | |||
23469 | } | |||
23470 | ||||
23471 | return DAG.getBuildVector(VT, DL, NewVecC); | |||
23472 | } | |||
23473 | ||||
23474 | /// As another special case, use PSUBUS[BW] when it's profitable. E.g. for | |||
23475 | /// Op0 u<= Op1: | |||
23476 | /// t = psubus Op0, Op1 | |||
23477 | /// pcmpeq t, <0..0> | |||
23478 | static SDValue LowerVSETCCWithSUBUS(SDValue Op0, SDValue Op1, MVT VT, | |||
23479 | ISD::CondCode Cond, const SDLoc &dl, | |||
23480 | const X86Subtarget &Subtarget, | |||
23481 | SelectionDAG &DAG) { | |||
23482 | if (!Subtarget.hasSSE2()) | |||
23483 | return SDValue(); | |||
23484 | ||||
23485 | MVT VET = VT.getVectorElementType(); | |||
23486 | if (VET != MVT::i8 && VET != MVT::i16) | |||
23487 | return SDValue(); | |||
23488 | ||||
23489 | switch (Cond) { | |||
23490 | default: | |||
23491 | return SDValue(); | |||
23492 | case ISD::SETULT: { | |||
23493 | // If the comparison is against a constant we can turn this into a | |||
23494 | // setule. With psubus, setule does not require a swap. This is | |||
23495 | // beneficial because the constant in the register is no longer | |||
23496 | // destructed as the destination so it can be hoisted out of a loop. | |||
23497 | // Only do this pre-AVX since vpcmp* is no longer destructive. | |||
23498 | if (Subtarget.hasAVX()) | |||
23499 | return SDValue(); | |||
23500 | SDValue ULEOp1 = incDecVectorConstant(Op1, DAG, /*IsInc*/false); | |||
23501 | if (!ULEOp1) | |||
23502 | return SDValue(); | |||
23503 | Op1 = ULEOp1; | |||
23504 | break; | |||
23505 | } | |||
23506 | case ISD::SETUGT: { | |||
23507 | // If the comparison is against a constant, we can turn this into a setuge. | |||
23508 | // This is beneficial because materializing a constant 0 for the PCMPEQ is | |||
23509 | // probably cheaper than XOR+PCMPGT using 2 different vector constants: | |||
23510 | // cmpgt (xor X, SignMaskC) CmpC --> cmpeq (usubsat (CmpC+1), X), 0 | |||
23511 | SDValue UGEOp1 = incDecVectorConstant(Op1, DAG, /*IsInc*/true); | |||
23512 | if (!UGEOp1) | |||
23513 | return SDValue(); | |||
23514 | Op1 = Op0; | |||
23515 | Op0 = UGEOp1; | |||
23516 | break; | |||
23517 | } | |||
23518 | // Psubus is better than flip-sign because it requires no inversion. | |||
23519 | case ISD::SETUGE: | |||
23520 | std::swap(Op0, Op1); | |||
23521 | break; | |||
23522 | case ISD::SETULE: | |||
23523 | break; | |||
23524 | } | |||
23525 | ||||
23526 | SDValue Result = DAG.getNode(ISD::USUBSAT, dl, VT, Op0, Op1); | |||
23527 | return DAG.getNode(X86ISD::PCMPEQ, dl, VT, Result, | |||
23528 | DAG.getConstant(0, dl, VT)); | |||
23529 | } | |||
23530 | ||||
23531 | static SDValue LowerVSETCC(SDValue Op, const X86Subtarget &Subtarget, | |||
23532 | SelectionDAG &DAG) { | |||
23533 | bool IsStrict = Op.getOpcode() == ISD::STRICT_FSETCC || | |||
23534 | Op.getOpcode() == ISD::STRICT_FSETCCS; | |||
23535 | SDValue Op0 = Op.getOperand(IsStrict ? 1 : 0); | |||
23536 | SDValue Op1 = Op.getOperand(IsStrict ? 2 : 1); | |||
23537 | SDValue CC = Op.getOperand(IsStrict ? 3 : 2); | |||
23538 | MVT VT = Op->getSimpleValueType(0); | |||
23539 | ISD::CondCode Cond = cast<CondCodeSDNode>(CC)->get(); | |||
23540 | bool isFP = Op1.getSimpleValueType().isFloatingPoint(); | |||
23541 | SDLoc dl(Op); | |||
23542 | ||||
23543 | if (isFP) { | |||
23544 | #ifndef NDEBUG | |||
23545 | MVT EltVT = Op0.getSimpleValueType().getVectorElementType(); | |||
23546 | assert(EltVT == MVT::f16 || EltVT == MVT::f32 || EltVT == MVT::f64)(static_cast <bool> (EltVT == MVT::f16 || EltVT == MVT:: f32 || EltVT == MVT::f64) ? void (0) : __assert_fail ("EltVT == MVT::f16 || EltVT == MVT::f32 || EltVT == MVT::f64" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 23546, __extension__ __PRETTY_FUNCTION__)); | |||
23547 | #endif | |||
23548 | ||||
23549 | bool IsSignaling = Op.getOpcode() == ISD::STRICT_FSETCCS; | |||
23550 | SDValue Chain = IsStrict ? Op.getOperand(0) : SDValue(); | |||
23551 | ||||
23552 | // If we have a strict compare with a vXi1 result and the input is 128/256 | |||
23553 | // bits we can't use a masked compare unless we have VLX. If we use a wider | |||
23554 | // compare like we do for non-strict, we might trigger spurious exceptions | |||
23555 | // from the upper elements. Instead emit a AVX compare and convert to mask. | |||
23556 | unsigned Opc; | |||
23557 | if (Subtarget.hasAVX512() && VT.getVectorElementType() == MVT::i1 && | |||
23558 | (!IsStrict || Subtarget.hasVLX() || | |||
23559 | Op0.getSimpleValueType().is512BitVector())) { | |||
23560 | #ifndef NDEBUG | |||
23561 | unsigned Num = VT.getVectorNumElements(); | |||
23562 | assert(Num <= 16 || (Num == 32 && EltVT == MVT::f16))(static_cast <bool> (Num <= 16 || (Num == 32 && EltVT == MVT::f16)) ? void (0) : __assert_fail ("Num <= 16 || (Num == 32 && EltVT == MVT::f16)" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 23562, __extension__ __PRETTY_FUNCTION__)); | |||
23563 | #endif | |||
23564 | Opc = IsStrict ? X86ISD::STRICT_CMPM : X86ISD::CMPM; | |||
23565 | } else { | |||
23566 | Opc = IsStrict ? X86ISD::STRICT_CMPP : X86ISD::CMPP; | |||
23567 | // The SSE/AVX packed FP comparison nodes are defined with a | |||
23568 | // floating-point vector result that matches the operand type. This allows | |||
23569 | // them to work with an SSE1 target (integer vector types are not legal). | |||
23570 | VT = Op0.getSimpleValueType(); | |||
23571 | } | |||
23572 | ||||
23573 | SDValue Cmp; | |||
23574 | bool IsAlwaysSignaling; | |||
23575 | unsigned SSECC = translateX86FSETCC(Cond, Op0, Op1, IsAlwaysSignaling); | |||
23576 | if (!Subtarget.hasAVX()) { | |||
23577 | // TODO: We could use following steps to handle a quiet compare with | |||
23578 | // signaling encodings. | |||
23579 | // 1. Get ordered masks from a quiet ISD::SETO | |||
23580 | // 2. Use the masks to mask potential unordered elements in operand A, B | |||
23581 | // 3. Get the compare results of masked A, B | |||
23582 | // 4. Calculating final result using the mask and result from 3 | |||
23583 | // But currently, we just fall back to scalar operations. | |||
23584 | if (IsStrict && IsAlwaysSignaling && !IsSignaling) | |||
23585 | return SDValue(); | |||
23586 | ||||
23587 | // Insert an extra signaling instruction to raise exception. | |||
23588 | if (IsStrict && !IsAlwaysSignaling && IsSignaling) { | |||
23589 | SDValue SignalCmp = DAG.getNode( | |||
23590 | Opc, dl, {VT, MVT::Other}, | |||
23591 | {Chain, Op0, Op1, DAG.getTargetConstant(1, dl, MVT::i8)}); // LT_OS | |||
23592 | // FIXME: It seems we need to update the flags of all new strict nodes. | |||
23593 | // Otherwise, mayRaiseFPException in MI will return false due to | |||
23594 | // NoFPExcept = false by default. However, I didn't find it in other | |||
23595 | // patches. | |||
23596 | SignalCmp->setFlags(Op->getFlags()); | |||
23597 | Chain = SignalCmp.getValue(1); | |||
23598 | } | |||
23599 | ||||
23600 | // In the two cases not handled by SSE compare predicates (SETUEQ/SETONE), | |||
23601 | // emit two comparisons and a logic op to tie them together. | |||
23602 | if (SSECC >= 8) { | |||
23603 | // LLVM predicate is SETUEQ or SETONE. | |||
23604 | unsigned CC0, CC1; | |||
23605 | unsigned CombineOpc; | |||
23606 | if (Cond == ISD::SETUEQ) { | |||
23607 | CC0 = 3; // UNORD | |||
23608 | CC1 = 0; // EQ | |||
23609 | CombineOpc = X86ISD::FOR; | |||
23610 | } else { | |||
23611 | assert(Cond == ISD::SETONE)(static_cast <bool> (Cond == ISD::SETONE) ? void (0) : __assert_fail ("Cond == ISD::SETONE", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 23611, __extension__ __PRETTY_FUNCTION__)); | |||
23612 | CC0 = 7; // ORD | |||
23613 | CC1 = 4; // NEQ | |||
23614 | CombineOpc = X86ISD::FAND; | |||
23615 | } | |||
23616 | ||||
23617 | SDValue Cmp0, Cmp1; | |||
23618 | if (IsStrict) { | |||
23619 | Cmp0 = DAG.getNode( | |||
23620 | Opc, dl, {VT, MVT::Other}, | |||
23621 | {Chain, Op0, Op1, DAG.getTargetConstant(CC0, dl, MVT::i8)}); | |||
23622 | Cmp1 = DAG.getNode( | |||
23623 | Opc, dl, {VT, MVT::Other}, | |||
23624 | {Chain, Op0, Op1, DAG.getTargetConstant(CC1, dl, MVT::i8)}); | |||
23625 | Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Cmp0.getValue(1), | |||
23626 | Cmp1.getValue(1)); | |||
23627 | } else { | |||
23628 | Cmp0 = DAG.getNode( | |||
23629 | Opc, dl, VT, Op0, Op1, DAG.getTargetConstant(CC0, dl, MVT::i8)); | |||
23630 | Cmp1 = DAG.getNode( | |||
23631 | Opc, dl, VT, Op0, Op1, DAG.getTargetConstant(CC1, dl, MVT::i8)); | |||
23632 | } | |||
23633 | Cmp = DAG.getNode(CombineOpc, dl, VT, Cmp0, Cmp1); | |||
23634 | } else { | |||
23635 | if (IsStrict) { | |||
23636 | Cmp = DAG.getNode( | |||
23637 | Opc, dl, {VT, MVT::Other}, | |||
23638 | {Chain, Op0, Op1, DAG.getTargetConstant(SSECC, dl, MVT::i8)}); | |||
23639 | Chain = Cmp.getValue(1); | |||
23640 | } else | |||
23641 | Cmp = DAG.getNode( | |||
23642 | Opc, dl, VT, Op0, Op1, DAG.getTargetConstant(SSECC, dl, MVT::i8)); | |||
23643 | } | |||
23644 | } else { | |||
23645 | // Handle all other FP comparisons here. | |||
23646 | if (IsStrict) { | |||
23647 | // Make a flip on already signaling CCs before setting bit 4 of AVX CC. | |||
23648 | SSECC |= (IsAlwaysSignaling ^ IsSignaling) << 4; | |||
23649 | Cmp = DAG.getNode( | |||
23650 | Opc, dl, {VT, MVT::Other}, | |||
23651 | {Chain, Op0, Op1, DAG.getTargetConstant(SSECC, dl, MVT::i8)}); | |||
23652 | Chain = Cmp.getValue(1); | |||
23653 | } else | |||
23654 | Cmp = DAG.getNode( | |||
23655 | Opc, dl, VT, Op0, Op1, DAG.getTargetConstant(SSECC, dl, MVT::i8)); | |||
23656 | } | |||
23657 | ||||
23658 | if (VT.getFixedSizeInBits() > | |||
23659 | Op.getSimpleValueType().getFixedSizeInBits()) { | |||
23660 | // We emitted a compare with an XMM/YMM result. Finish converting to a | |||
23661 | // mask register using a vptestm. | |||
23662 | EVT CastVT = EVT(VT).changeVectorElementTypeToInteger(); | |||
23663 | Cmp = DAG.getBitcast(CastVT, Cmp); | |||
23664 | Cmp = DAG.getSetCC(dl, Op.getSimpleValueType(), Cmp, | |||
23665 | DAG.getConstant(0, dl, CastVT), ISD::SETNE); | |||
23666 | } else { | |||
23667 | // If this is SSE/AVX CMPP, bitcast the result back to integer to match | |||
23668 | // the result type of SETCC. The bitcast is expected to be optimized | |||
23669 | // away during combining/isel. | |||
23670 | Cmp = DAG.getBitcast(Op.getSimpleValueType(), Cmp); | |||
23671 | } | |||
23672 | ||||
23673 | if (IsStrict) | |||
23674 | return DAG.getMergeValues({Cmp, Chain}, dl); | |||
23675 | ||||
23676 | return Cmp; | |||
23677 | } | |||
23678 | ||||
23679 | assert(!IsStrict && "Strict SETCC only handles FP operands.")(static_cast <bool> (!IsStrict && "Strict SETCC only handles FP operands." ) ? void (0) : __assert_fail ("!IsStrict && \"Strict SETCC only handles FP operands.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 23679, __extension__ __PRETTY_FUNCTION__)); | |||
23680 | ||||
23681 | MVT VTOp0 = Op0.getSimpleValueType(); | |||
23682 | (void)VTOp0; | |||
23683 | assert(VTOp0 == Op1.getSimpleValueType() &&(static_cast <bool> (VTOp0 == Op1.getSimpleValueType() && "Expected operands with same type!") ? void (0) : __assert_fail ("VTOp0 == Op1.getSimpleValueType() && \"Expected operands with same type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 23684, __extension__ __PRETTY_FUNCTION__)) | |||
23684 | "Expected operands with same type!")(static_cast <bool> (VTOp0 == Op1.getSimpleValueType() && "Expected operands with same type!") ? void (0) : __assert_fail ("VTOp0 == Op1.getSimpleValueType() && \"Expected operands with same type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 23684, __extension__ __PRETTY_FUNCTION__)); | |||
23685 | assert(VT.getVectorNumElements() == VTOp0.getVectorNumElements() &&(static_cast <bool> (VT.getVectorNumElements() == VTOp0 .getVectorNumElements() && "Invalid number of packed elements for source and destination!" ) ? void (0) : __assert_fail ("VT.getVectorNumElements() == VTOp0.getVectorNumElements() && \"Invalid number of packed elements for source and destination!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 23686, __extension__ __PRETTY_FUNCTION__)) | |||
23686 | "Invalid number of packed elements for source and destination!")(static_cast <bool> (VT.getVectorNumElements() == VTOp0 .getVectorNumElements() && "Invalid number of packed elements for source and destination!" ) ? void (0) : __assert_fail ("VT.getVectorNumElements() == VTOp0.getVectorNumElements() && \"Invalid number of packed elements for source and destination!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 23686, __extension__ __PRETTY_FUNCTION__)); | |||
23687 | ||||
23688 | // The non-AVX512 code below works under the assumption that source and | |||
23689 | // destination types are the same. | |||
23690 | assert((Subtarget.hasAVX512() || (VT == VTOp0)) &&(static_cast <bool> ((Subtarget.hasAVX512() || (VT == VTOp0 )) && "Value types for source and destination must be the same!" ) ? void (0) : __assert_fail ("(Subtarget.hasAVX512() || (VT == VTOp0)) && \"Value types for source and destination must be the same!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 23691, __extension__ __PRETTY_FUNCTION__)) | |||
23691 | "Value types for source and destination must be the same!")(static_cast <bool> ((Subtarget.hasAVX512() || (VT == VTOp0 )) && "Value types for source and destination must be the same!" ) ? void (0) : __assert_fail ("(Subtarget.hasAVX512() || (VT == VTOp0)) && \"Value types for source and destination must be the same!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 23691, __extension__ __PRETTY_FUNCTION__)); | |||
23692 | ||||
23693 | // The result is boolean, but operands are int/float | |||
23694 | if (VT.getVectorElementType() == MVT::i1) { | |||
23695 | // In AVX-512 architecture setcc returns mask with i1 elements, | |||
23696 | // But there is no compare instruction for i8 and i16 elements in KNL. | |||
23697 | assert((VTOp0.getScalarSizeInBits() >= 32 || Subtarget.hasBWI()) &&(static_cast <bool> ((VTOp0.getScalarSizeInBits() >= 32 || Subtarget.hasBWI()) && "Unexpected operand type" ) ? void (0) : __assert_fail ("(VTOp0.getScalarSizeInBits() >= 32 || Subtarget.hasBWI()) && \"Unexpected operand type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 23698, __extension__ __PRETTY_FUNCTION__)) | |||
23698 | "Unexpected operand type")(static_cast <bool> ((VTOp0.getScalarSizeInBits() >= 32 || Subtarget.hasBWI()) && "Unexpected operand type" ) ? void (0) : __assert_fail ("(VTOp0.getScalarSizeInBits() >= 32 || Subtarget.hasBWI()) && \"Unexpected operand type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 23698, __extension__ __PRETTY_FUNCTION__)); | |||
23699 | return LowerIntVSETCC_AVX512(Op, DAG); | |||
23700 | } | |||
23701 | ||||
23702 | // Lower using XOP integer comparisons. | |||
23703 | if (VT.is128BitVector() && Subtarget.hasXOP()) { | |||
23704 | // Translate compare code to XOP PCOM compare mode. | |||
23705 | unsigned CmpMode = 0; | |||
23706 | switch (Cond) { | |||
23707 | default: llvm_unreachable("Unexpected SETCC condition")::llvm::llvm_unreachable_internal("Unexpected SETCC condition" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 23707); | |||
23708 | case ISD::SETULT: | |||
23709 | case ISD::SETLT: CmpMode = 0x00; break; | |||
23710 | case ISD::SETULE: | |||
23711 | case ISD::SETLE: CmpMode = 0x01; break; | |||
23712 | case ISD::SETUGT: | |||
23713 | case ISD::SETGT: CmpMode = 0x02; break; | |||
23714 | case ISD::SETUGE: | |||
23715 | case ISD::SETGE: CmpMode = 0x03; break; | |||
23716 | case ISD::SETEQ: CmpMode = 0x04; break; | |||
23717 | case ISD::SETNE: CmpMode = 0x05; break; | |||
23718 | } | |||
23719 | ||||
23720 | // Are we comparing unsigned or signed integers? | |||
23721 | unsigned Opc = | |||
23722 | ISD::isUnsignedIntSetCC(Cond) ? X86ISD::VPCOMU : X86ISD::VPCOM; | |||
23723 | ||||
23724 | return DAG.getNode(Opc, dl, VT, Op0, Op1, | |||
23725 | DAG.getTargetConstant(CmpMode, dl, MVT::i8)); | |||
23726 | } | |||
23727 | ||||
23728 | // (X & Y) != 0 --> (X & Y) == Y iff Y is power-of-2. | |||
23729 | // Revert part of the simplifySetCCWithAnd combine, to avoid an invert. | |||
23730 | if (Cond == ISD::SETNE && ISD::isBuildVectorAllZeros(Op1.getNode())) { | |||
23731 | SDValue BC0 = peekThroughBitcasts(Op0); | |||
23732 | if (BC0.getOpcode() == ISD::AND) { | |||
23733 | APInt UndefElts; | |||
23734 | SmallVector<APInt, 64> EltBits; | |||
23735 | if (getTargetConstantBitsFromNode(BC0.getOperand(1), | |||
23736 | VT.getScalarSizeInBits(), UndefElts, | |||
23737 | EltBits, false, false)) { | |||
23738 | if (llvm::all_of(EltBits, [](APInt &V) { return V.isPowerOf2(); })) { | |||
23739 | Cond = ISD::SETEQ; | |||
23740 | Op1 = DAG.getBitcast(VT, BC0.getOperand(1)); | |||
23741 | } | |||
23742 | } | |||
23743 | } | |||
23744 | } | |||
23745 | ||||
23746 | // ICMP_EQ(AND(X,C),C) -> SRA(SHL(X,LOG2(C)),BW-1) iff C is power-of-2. | |||
23747 | if (Cond == ISD::SETEQ && Op0.getOpcode() == ISD::AND && | |||
23748 | Op0.getOperand(1) == Op1 && Op0.hasOneUse()) { | |||
23749 | ConstantSDNode *C1 = isConstOrConstSplat(Op1); | |||
23750 | if (C1 && C1->getAPIntValue().isPowerOf2()) { | |||
23751 | unsigned BitWidth = VT.getScalarSizeInBits(); | |||
23752 | unsigned ShiftAmt = BitWidth - C1->getAPIntValue().logBase2() - 1; | |||
23753 | ||||
23754 | SDValue Result = Op0.getOperand(0); | |||
23755 | Result = DAG.getNode(ISD::SHL, dl, VT, Result, | |||
23756 | DAG.getConstant(ShiftAmt, dl, VT)); | |||
23757 | Result = DAG.getNode(ISD::SRA, dl, VT, Result, | |||
23758 | DAG.getConstant(BitWidth - 1, dl, VT)); | |||
23759 | return Result; | |||
23760 | } | |||
23761 | } | |||
23762 | ||||
23763 | // Break 256-bit integer vector compare into smaller ones. | |||
23764 | if (VT.is256BitVector() && !Subtarget.hasInt256()) | |||
23765 | return splitIntVSETCC(VT, Op0, Op1, Cond, DAG, dl); | |||
23766 | ||||
23767 | if (VT == MVT::v32i16 || VT == MVT::v64i8) { | |||
23768 | assert(!Subtarget.hasBWI() && "Unexpected VT with AVX512BW!")(static_cast <bool> (!Subtarget.hasBWI() && "Unexpected VT with AVX512BW!" ) ? void (0) : __assert_fail ("!Subtarget.hasBWI() && \"Unexpected VT with AVX512BW!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 23768, __extension__ __PRETTY_FUNCTION__)); | |||
23769 | return splitIntVSETCC(VT, Op0, Op1, Cond, DAG, dl); | |||
23770 | } | |||
23771 | ||||
23772 | // If we have a limit constant, try to form PCMPGT (signed cmp) to avoid | |||
23773 | // not-of-PCMPEQ: | |||
23774 | // X != INT_MIN --> X >s INT_MIN | |||
23775 | // X != INT_MAX --> X <s INT_MAX --> INT_MAX >s X | |||
23776 | // +X != 0 --> +X >s 0 | |||
23777 | APInt ConstValue; | |||
23778 | if (Cond == ISD::SETNE && | |||
23779 | ISD::isConstantSplatVector(Op1.getNode(), ConstValue)) { | |||
23780 | if (ConstValue.isMinSignedValue()) | |||
23781 | Cond = ISD::SETGT; | |||
23782 | else if (ConstValue.isMaxSignedValue()) | |||
23783 | Cond = ISD::SETLT; | |||
23784 | else if (ConstValue.isNullValue() && DAG.SignBitIsZero(Op0)) | |||
23785 | Cond = ISD::SETGT; | |||
23786 | } | |||
23787 | ||||
23788 | // If both operands are known non-negative, then an unsigned compare is the | |||
23789 | // same as a signed compare and there's no need to flip signbits. | |||
23790 | // TODO: We could check for more general simplifications here since we're | |||
23791 | // computing known bits. | |||
23792 | bool FlipSigns = ISD::isUnsignedIntSetCC(Cond) && | |||
23793 | !(DAG.SignBitIsZero(Op0) && DAG.SignBitIsZero(Op1)); | |||
23794 | ||||
23795 | // Special case: Use min/max operations for unsigned compares. | |||
23796 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
23797 | if (ISD::isUnsignedIntSetCC(Cond) && | |||
23798 | (FlipSigns || ISD::isTrueWhenEqual(Cond)) && | |||
23799 | TLI.isOperationLegal(ISD::UMIN, VT)) { | |||
23800 | // If we have a constant operand, increment/decrement it and change the | |||
23801 | // condition to avoid an invert. | |||
23802 | if (Cond == ISD::SETUGT) { | |||
23803 | // X > C --> X >= (C+1) --> X == umax(X, C+1) | |||
23804 | if (SDValue UGTOp1 = incDecVectorConstant(Op1, DAG, /*IsInc*/true)) { | |||
23805 | Op1 = UGTOp1; | |||
23806 | Cond = ISD::SETUGE; | |||
23807 | } | |||
23808 | } | |||
23809 | if (Cond == ISD::SETULT) { | |||
23810 | // X < C --> X <= (C-1) --> X == umin(X, C-1) | |||
23811 | if (SDValue ULTOp1 = incDecVectorConstant(Op1, DAG, /*IsInc*/false)) { | |||
23812 | Op1 = ULTOp1; | |||
23813 | Cond = ISD::SETULE; | |||
23814 | } | |||
23815 | } | |||
23816 | bool Invert = false; | |||
23817 | unsigned Opc; | |||
23818 | switch (Cond) { | |||
23819 | default: llvm_unreachable("Unexpected condition code")::llvm::llvm_unreachable_internal("Unexpected condition code" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 23819); | |||
23820 | case ISD::SETUGT: Invert = true; LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
23821 | case ISD::SETULE: Opc = ISD::UMIN; break; | |||
23822 | case ISD::SETULT: Invert = true; LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
23823 | case ISD::SETUGE: Opc = ISD::UMAX; break; | |||
23824 | } | |||
23825 | ||||
23826 | SDValue Result = DAG.getNode(Opc, dl, VT, Op0, Op1); | |||
23827 | Result = DAG.getNode(X86ISD::PCMPEQ, dl, VT, Op0, Result); | |||
23828 | ||||
23829 | // If the logical-not of the result is required, perform that now. | |||
23830 | if (Invert) | |||
23831 | Result = DAG.getNOT(dl, Result, VT); | |||
23832 | ||||
23833 | return Result; | |||
23834 | } | |||
23835 | ||||
23836 | // Try to use SUBUS and PCMPEQ. | |||
23837 | if (FlipSigns) | |||
23838 | if (SDValue V = | |||
23839 | LowerVSETCCWithSUBUS(Op0, Op1, VT, Cond, dl, Subtarget, DAG)) | |||
23840 | return V; | |||
23841 | ||||
23842 | // We are handling one of the integer comparisons here. Since SSE only has | |||
23843 | // GT and EQ comparisons for integer, swapping operands and multiple | |||
23844 | // operations may be required for some comparisons. | |||
23845 | unsigned Opc = (Cond == ISD::SETEQ || Cond == ISD::SETNE) ? X86ISD::PCMPEQ | |||
23846 | : X86ISD::PCMPGT; | |||
23847 | bool Swap = Cond == ISD::SETLT || Cond == ISD::SETULT || | |||
23848 | Cond == ISD::SETGE || Cond == ISD::SETUGE; | |||
23849 | bool Invert = Cond == ISD::SETNE || | |||
23850 | (Cond != ISD::SETEQ && ISD::isTrueWhenEqual(Cond)); | |||
23851 | ||||
23852 | if (Swap) | |||
23853 | std::swap(Op0, Op1); | |||
23854 | ||||
23855 | // Check that the operation in question is available (most are plain SSE2, | |||
23856 | // but PCMPGTQ and PCMPEQQ have different requirements). | |||
23857 | if (VT == MVT::v2i64) { | |||
23858 | if (Opc == X86ISD::PCMPGT && !Subtarget.hasSSE42()) { | |||
23859 | assert(Subtarget.hasSSE2() && "Don't know how to lower!")(static_cast <bool> (Subtarget.hasSSE2() && "Don't know how to lower!" ) ? void (0) : __assert_fail ("Subtarget.hasSSE2() && \"Don't know how to lower!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 23859, __extension__ __PRETTY_FUNCTION__)); | |||
23860 | ||||
23861 | // Special case for sign bit test. We can use a v4i32 PCMPGT and shuffle | |||
23862 | // the odd elements over the even elements. | |||
23863 | if (!FlipSigns && !Invert && ISD::isBuildVectorAllZeros(Op0.getNode())) { | |||
23864 | Op0 = DAG.getConstant(0, dl, MVT::v4i32); | |||
23865 | Op1 = DAG.getBitcast(MVT::v4i32, Op1); | |||
23866 | ||||
23867 | SDValue GT = DAG.getNode(X86ISD::PCMPGT, dl, MVT::v4i32, Op0, Op1); | |||
23868 | static const int MaskHi[] = { 1, 1, 3, 3 }; | |||
23869 | SDValue Result = DAG.getVectorShuffle(MVT::v4i32, dl, GT, GT, MaskHi); | |||
23870 | ||||
23871 | return DAG.getBitcast(VT, Result); | |||
23872 | } | |||
23873 | ||||
23874 | if (!FlipSigns && !Invert && ISD::isBuildVectorAllOnes(Op1.getNode())) { | |||
23875 | Op0 = DAG.getBitcast(MVT::v4i32, Op0); | |||
23876 | Op1 = DAG.getConstant(-1, dl, MVT::v4i32); | |||
23877 | ||||
23878 | SDValue GT = DAG.getNode(X86ISD::PCMPGT, dl, MVT::v4i32, Op0, Op1); | |||
23879 | static const int MaskHi[] = { 1, 1, 3, 3 }; | |||
23880 | SDValue Result = DAG.getVectorShuffle(MVT::v4i32, dl, GT, GT, MaskHi); | |||
23881 | ||||
23882 | return DAG.getBitcast(VT, Result); | |||
23883 | } | |||
23884 | ||||
23885 | // Since SSE has no unsigned integer comparisons, we need to flip the sign | |||
23886 | // bits of the inputs before performing those operations. The lower | |||
23887 | // compare is always unsigned. | |||
23888 | SDValue SB; | |||
23889 | if (FlipSigns) { | |||
23890 | SB = DAG.getConstant(0x8000000080000000ULL, dl, MVT::v2i64); | |||
23891 | } else { | |||
23892 | SB = DAG.getConstant(0x0000000080000000ULL, dl, MVT::v2i64); | |||
23893 | } | |||
23894 | Op0 = DAG.getNode(ISD::XOR, dl, MVT::v2i64, Op0, SB); | |||
23895 | Op1 = DAG.getNode(ISD::XOR, dl, MVT::v2i64, Op1, SB); | |||
23896 | ||||
23897 | // Cast everything to the right type. | |||
23898 | Op0 = DAG.getBitcast(MVT::v4i32, Op0); | |||
23899 | Op1 = DAG.getBitcast(MVT::v4i32, Op1); | |||
23900 | ||||
23901 | // Emulate PCMPGTQ with (hi1 > hi2) | ((hi1 == hi2) & (lo1 > lo2)) | |||
23902 | SDValue GT = DAG.getNode(X86ISD::PCMPGT, dl, MVT::v4i32, Op0, Op1); | |||
23903 | SDValue EQ = DAG.getNode(X86ISD::PCMPEQ, dl, MVT::v4i32, Op0, Op1); | |||
23904 | ||||
23905 | // Create masks for only the low parts/high parts of the 64 bit integers. | |||
23906 | static const int MaskHi[] = { 1, 1, 3, 3 }; | |||
23907 | static const int MaskLo[] = { 0, 0, 2, 2 }; | |||
23908 | SDValue EQHi = DAG.getVectorShuffle(MVT::v4i32, dl, EQ, EQ, MaskHi); | |||
23909 | SDValue GTLo = DAG.getVectorShuffle(MVT::v4i32, dl, GT, GT, MaskLo); | |||
23910 | SDValue GTHi = DAG.getVectorShuffle(MVT::v4i32, dl, GT, GT, MaskHi); | |||
23911 | ||||
23912 | SDValue Result = DAG.getNode(ISD::AND, dl, MVT::v4i32, EQHi, GTLo); | |||
23913 | Result = DAG.getNode(ISD::OR, dl, MVT::v4i32, Result, GTHi); | |||
23914 | ||||
23915 | if (Invert) | |||
23916 | Result = DAG.getNOT(dl, Result, MVT::v4i32); | |||
23917 | ||||
23918 | return DAG.getBitcast(VT, Result); | |||
23919 | } | |||
23920 | ||||
23921 | if (Opc == X86ISD::PCMPEQ && !Subtarget.hasSSE41()) { | |||
23922 | // If pcmpeqq is missing but pcmpeqd is available synthesize pcmpeqq with | |||
23923 | // pcmpeqd + pshufd + pand. | |||
23924 | assert(Subtarget.hasSSE2() && !FlipSigns && "Don't know how to lower!")(static_cast <bool> (Subtarget.hasSSE2() && !FlipSigns && "Don't know how to lower!") ? void (0) : __assert_fail ("Subtarget.hasSSE2() && !FlipSigns && \"Don't know how to lower!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 23924, __extension__ __PRETTY_FUNCTION__)); | |||
23925 | ||||
23926 | // First cast everything to the right type. | |||
23927 | Op0 = DAG.getBitcast(MVT::v4i32, Op0); | |||
23928 | Op1 = DAG.getBitcast(MVT::v4i32, Op1); | |||
23929 | ||||
23930 | // Do the compare. | |||
23931 | SDValue Result = DAG.getNode(Opc, dl, MVT::v4i32, Op0, Op1); | |||
23932 | ||||
23933 | // Make sure the lower and upper halves are both all-ones. | |||
23934 | static const int Mask[] = { 1, 0, 3, 2 }; | |||
23935 | SDValue Shuf = DAG.getVectorShuffle(MVT::v4i32, dl, Result, Result, Mask); | |||
23936 | Result = DAG.getNode(ISD::AND, dl, MVT::v4i32, Result, Shuf); | |||
23937 | ||||
23938 | if (Invert) | |||
23939 | Result = DAG.getNOT(dl, Result, MVT::v4i32); | |||
23940 | ||||
23941 | return DAG.getBitcast(VT, Result); | |||
23942 | } | |||
23943 | } | |||
23944 | ||||
23945 | // Since SSE has no unsigned integer comparisons, we need to flip the sign | |||
23946 | // bits of the inputs before performing those operations. | |||
23947 | if (FlipSigns) { | |||
23948 | MVT EltVT = VT.getVectorElementType(); | |||
23949 | SDValue SM = DAG.getConstant(APInt::getSignMask(EltVT.getSizeInBits()), dl, | |||
23950 | VT); | |||
23951 | Op0 = DAG.getNode(ISD::XOR, dl, VT, Op0, SM); | |||
23952 | Op1 = DAG.getNode(ISD::XOR, dl, VT, Op1, SM); | |||
23953 | } | |||
23954 | ||||
23955 | SDValue Result = DAG.getNode(Opc, dl, VT, Op0, Op1); | |||
23956 | ||||
23957 | // If the logical-not of the result is required, perform that now. | |||
23958 | if (Invert) | |||
23959 | Result = DAG.getNOT(dl, Result, VT); | |||
23960 | ||||
23961 | return Result; | |||
23962 | } | |||
23963 | ||||
23964 | // Try to select this as a KORTEST+SETCC or KTEST+SETCC if possible. | |||
23965 | static SDValue EmitAVX512Test(SDValue Op0, SDValue Op1, ISD::CondCode CC, | |||
23966 | const SDLoc &dl, SelectionDAG &DAG, | |||
23967 | const X86Subtarget &Subtarget, | |||
23968 | SDValue &X86CC) { | |||
23969 | // Only support equality comparisons. | |||
23970 | if (CC != ISD::SETEQ && CC != ISD::SETNE) | |||
23971 | return SDValue(); | |||
23972 | ||||
23973 | // Must be a bitcast from vXi1. | |||
23974 | if (Op0.getOpcode() != ISD::BITCAST) | |||
23975 | return SDValue(); | |||
23976 | ||||
23977 | Op0 = Op0.getOperand(0); | |||
23978 | MVT VT = Op0.getSimpleValueType(); | |||
23979 | if (!(Subtarget.hasAVX512() && VT == MVT::v16i1) && | |||
23980 | !(Subtarget.hasDQI() && VT == MVT::v8i1) && | |||
23981 | !(Subtarget.hasBWI() && (VT == MVT::v32i1 || VT == MVT::v64i1))) | |||
23982 | return SDValue(); | |||
23983 | ||||
23984 | X86::CondCode X86Cond; | |||
23985 | if (isNullConstant(Op1)) { | |||
23986 | X86Cond = CC == ISD::SETEQ ? X86::COND_E : X86::COND_NE; | |||
23987 | } else if (isAllOnesConstant(Op1)) { | |||
23988 | // C flag is set for all ones. | |||
23989 | X86Cond = CC == ISD::SETEQ ? X86::COND_B : X86::COND_AE; | |||
23990 | } else | |||
23991 | return SDValue(); | |||
23992 | ||||
23993 | // If the input is an AND, we can combine it's operands into the KTEST. | |||
23994 | bool KTestable = false; | |||
23995 | if (Subtarget.hasDQI() && (VT == MVT::v8i1 || VT == MVT::v16i1)) | |||
23996 | KTestable = true; | |||
23997 | if (Subtarget.hasBWI() && (VT == MVT::v32i1 || VT == MVT::v64i1)) | |||
23998 | KTestable = true; | |||
23999 | if (!isNullConstant(Op1)) | |||
24000 | KTestable = false; | |||
24001 | if (KTestable && Op0.getOpcode() == ISD::AND && Op0.hasOneUse()) { | |||
24002 | SDValue LHS = Op0.getOperand(0); | |||
24003 | SDValue RHS = Op0.getOperand(1); | |||
24004 | X86CC = DAG.getTargetConstant(X86Cond, dl, MVT::i8); | |||
24005 | return DAG.getNode(X86ISD::KTEST, dl, MVT::i32, LHS, RHS); | |||
24006 | } | |||
24007 | ||||
24008 | // If the input is an OR, we can combine it's operands into the KORTEST. | |||
24009 | SDValue LHS = Op0; | |||
24010 | SDValue RHS = Op0; | |||
24011 | if (Op0.getOpcode() == ISD::OR && Op0.hasOneUse()) { | |||
24012 | LHS = Op0.getOperand(0); | |||
24013 | RHS = Op0.getOperand(1); | |||
24014 | } | |||
24015 | ||||
24016 | X86CC = DAG.getTargetConstant(X86Cond, dl, MVT::i8); | |||
24017 | return DAG.getNode(X86ISD::KORTEST, dl, MVT::i32, LHS, RHS); | |||
24018 | } | |||
24019 | ||||
24020 | /// Emit flags for the given setcc condition and operands. Also returns the | |||
24021 | /// corresponding X86 condition code constant in X86CC. | |||
24022 | SDValue X86TargetLowering::emitFlagsForSetcc(SDValue Op0, SDValue Op1, | |||
24023 | ISD::CondCode CC, const SDLoc &dl, | |||
24024 | SelectionDAG &DAG, | |||
24025 | SDValue &X86CC) const { | |||
24026 | // Optimize to BT if possible. | |||
24027 | // Lower (X & (1 << N)) == 0 to BT(X, N). | |||
24028 | // Lower ((X >>u N) & 1) != 0 to BT(X, N). | |||
24029 | // Lower ((X >>s N) & 1) != 0 to BT(X, N). | |||
24030 | if (Op0.getOpcode() == ISD::AND && Op0.hasOneUse() && isNullConstant(Op1) && | |||
24031 | (CC == ISD::SETEQ || CC == ISD::SETNE)) { | |||
24032 | if (SDValue BT = LowerAndToBT(Op0, CC, dl, DAG, X86CC)) | |||
24033 | return BT; | |||
24034 | } | |||
24035 | ||||
24036 | // Try to use PTEST/PMOVMSKB for a tree ORs equality compared with 0. | |||
24037 | // TODO: We could do AND tree with all 1s as well by using the C flag. | |||
24038 | if (isNullConstant(Op1) && (CC == ISD::SETEQ || CC == ISD::SETNE)) | |||
24039 | if (SDValue CmpZ = | |||
24040 | MatchVectorAllZeroTest(Op0, CC, dl, Subtarget, DAG, X86CC)) | |||
24041 | return CmpZ; | |||
24042 | ||||
24043 | // Try to lower using KORTEST or KTEST. | |||
24044 | if (SDValue Test = EmitAVX512Test(Op0, Op1, CC, dl, DAG, Subtarget, X86CC)) | |||
24045 | return Test; | |||
24046 | ||||
24047 | // Look for X == 0, X == 1, X != 0, or X != 1. We can simplify some forms of | |||
24048 | // these. | |||
24049 | if ((isOneConstant(Op1) || isNullConstant(Op1)) && | |||
24050 | (CC == ISD::SETEQ || CC == ISD::SETNE)) { | |||
24051 | // If the input is a setcc, then reuse the input setcc or use a new one with | |||
24052 | // the inverted condition. | |||
24053 | if (Op0.getOpcode() == X86ISD::SETCC) { | |||
24054 | bool Invert = (CC == ISD::SETNE) ^ isNullConstant(Op1); | |||
24055 | ||||
24056 | X86CC = Op0.getOperand(0); | |||
24057 | if (Invert) { | |||
24058 | X86::CondCode CCode = (X86::CondCode)Op0.getConstantOperandVal(0); | |||
24059 | CCode = X86::GetOppositeBranchCondition(CCode); | |||
24060 | X86CC = DAG.getTargetConstant(CCode, dl, MVT::i8); | |||
24061 | } | |||
24062 | ||||
24063 | return Op0.getOperand(1); | |||
24064 | } | |||
24065 | } | |||
24066 | ||||
24067 | // Try to use the carry flag from the add in place of an separate CMP for: | |||
24068 | // (seteq (add X, -1), -1). Similar for setne. | |||
24069 | if (isAllOnesConstant(Op1) && Op0.getOpcode() == ISD::ADD && | |||
24070 | Op0.getOperand(1) == Op1 && (CC == ISD::SETEQ || CC == ISD::SETNE)) { | |||
24071 | if (isProfitableToUseFlagOp(Op0)) { | |||
24072 | SDVTList VTs = DAG.getVTList(Op0.getValueType(), MVT::i32); | |||
24073 | ||||
24074 | SDValue New = DAG.getNode(X86ISD::ADD, dl, VTs, Op0.getOperand(0), | |||
24075 | Op0.getOperand(1)); | |||
24076 | DAG.ReplaceAllUsesOfValueWith(SDValue(Op0.getNode(), 0), New); | |||
24077 | X86::CondCode CCode = CC == ISD::SETEQ ? X86::COND_AE : X86::COND_B; | |||
24078 | X86CC = DAG.getTargetConstant(CCode, dl, MVT::i8); | |||
24079 | return SDValue(New.getNode(), 1); | |||
24080 | } | |||
24081 | } | |||
24082 | ||||
24083 | X86::CondCode CondCode = | |||
24084 | TranslateX86CC(CC, dl, /*IsFP*/ false, Op0, Op1, DAG); | |||
24085 | assert(CondCode != X86::COND_INVALID && "Unexpected condition code!")(static_cast <bool> (CondCode != X86::COND_INVALID && "Unexpected condition code!") ? void (0) : __assert_fail ("CondCode != X86::COND_INVALID && \"Unexpected condition code!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24085, __extension__ __PRETTY_FUNCTION__)); | |||
24086 | ||||
24087 | SDValue EFLAGS = EmitCmp(Op0, Op1, CondCode, dl, DAG, Subtarget); | |||
24088 | X86CC = DAG.getTargetConstant(CondCode, dl, MVT::i8); | |||
24089 | return EFLAGS; | |||
24090 | } | |||
24091 | ||||
24092 | SDValue X86TargetLowering::LowerSETCC(SDValue Op, SelectionDAG &DAG) const { | |||
24093 | ||||
24094 | bool IsStrict = Op.getOpcode() == ISD::STRICT_FSETCC || | |||
24095 | Op.getOpcode() == ISD::STRICT_FSETCCS; | |||
24096 | MVT VT = Op->getSimpleValueType(0); | |||
24097 | ||||
24098 | if (VT.isVector()) return LowerVSETCC(Op, Subtarget, DAG); | |||
24099 | ||||
24100 | assert(VT == MVT::i8 && "SetCC type must be 8-bit integer")(static_cast <bool> (VT == MVT::i8 && "SetCC type must be 8-bit integer" ) ? void (0) : __assert_fail ("VT == MVT::i8 && \"SetCC type must be 8-bit integer\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24100, __extension__ __PRETTY_FUNCTION__)); | |||
24101 | SDValue Chain = IsStrict ? Op.getOperand(0) : SDValue(); | |||
24102 | SDValue Op0 = Op.getOperand(IsStrict ? 1 : 0); | |||
24103 | SDValue Op1 = Op.getOperand(IsStrict ? 2 : 1); | |||
24104 | SDLoc dl(Op); | |||
24105 | ISD::CondCode CC = | |||
24106 | cast<CondCodeSDNode>(Op.getOperand(IsStrict ? 3 : 2))->get(); | |||
24107 | ||||
24108 | // Handle f128 first, since one possible outcome is a normal integer | |||
24109 | // comparison which gets handled by emitFlagsForSetcc. | |||
24110 | if (Op0.getValueType() == MVT::f128) { | |||
24111 | softenSetCCOperands(DAG, MVT::f128, Op0, Op1, CC, dl, Op0, Op1, Chain, | |||
24112 | Op.getOpcode() == ISD::STRICT_FSETCCS); | |||
24113 | ||||
24114 | // If softenSetCCOperands returned a scalar, use it. | |||
24115 | if (!Op1.getNode()) { | |||
24116 | assert(Op0.getValueType() == Op.getValueType() &&(static_cast <bool> (Op0.getValueType() == Op.getValueType () && "Unexpected setcc expansion!") ? void (0) : __assert_fail ("Op0.getValueType() == Op.getValueType() && \"Unexpected setcc expansion!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24117, __extension__ __PRETTY_FUNCTION__)) | |||
24117 | "Unexpected setcc expansion!")(static_cast <bool> (Op0.getValueType() == Op.getValueType () && "Unexpected setcc expansion!") ? void (0) : __assert_fail ("Op0.getValueType() == Op.getValueType() && \"Unexpected setcc expansion!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24117, __extension__ __PRETTY_FUNCTION__)); | |||
24118 | if (IsStrict) | |||
24119 | return DAG.getMergeValues({Op0, Chain}, dl); | |||
24120 | return Op0; | |||
24121 | } | |||
24122 | } | |||
24123 | ||||
24124 | if (Op0.getSimpleValueType().isInteger()) { | |||
24125 | // Attempt to canonicalize SGT/UGT -> SGE/UGE compares with constant which | |||
24126 | // reduces the number of EFLAGs bit reads (the GE conditions don't read ZF), | |||
24127 | // this may translate to less uops depending on uarch implementation. The | |||
24128 | // equivalent for SLE/ULE -> SLT/ULT isn't likely to happen as we already | |||
24129 | // canonicalize to that CondCode. | |||
24130 | // NOTE: Only do this if incrementing the constant doesn't increase the bit | |||
24131 | // encoding size - so it must either already be a i8 or i32 immediate, or it | |||
24132 | // shrinks down to that. We don't do this for any i64's to avoid additional | |||
24133 | // constant materializations. | |||
24134 | // TODO: Can we move this to TranslateX86CC to handle jumps/branches too? | |||
24135 | if (auto *Op1C = dyn_cast<ConstantSDNode>(Op1)) { | |||
24136 | const APInt &Op1Val = Op1C->getAPIntValue(); | |||
24137 | if (!Op1Val.isNullValue()) { | |||
24138 | // Ensure the constant+1 doesn't overflow. | |||
24139 | if ((CC == ISD::CondCode::SETGT && !Op1Val.isMaxSignedValue()) || | |||
24140 | (CC == ISD::CondCode::SETUGT && !Op1Val.isMaxValue())) { | |||
24141 | APInt Op1ValPlusOne = Op1Val + 1; | |||
24142 | if (Op1ValPlusOne.isSignedIntN(32) && | |||
24143 | (!Op1Val.isSignedIntN(8) || Op1ValPlusOne.isSignedIntN(8))) { | |||
24144 | Op1 = DAG.getConstant(Op1ValPlusOne, dl, Op0.getValueType()); | |||
24145 | CC = CC == ISD::CondCode::SETGT ? ISD::CondCode::SETGE | |||
24146 | : ISD::CondCode::SETUGE; | |||
24147 | } | |||
24148 | } | |||
24149 | } | |||
24150 | } | |||
24151 | ||||
24152 | SDValue X86CC; | |||
24153 | SDValue EFLAGS = emitFlagsForSetcc(Op0, Op1, CC, dl, DAG, X86CC); | |||
24154 | SDValue Res = DAG.getNode(X86ISD::SETCC, dl, MVT::i8, X86CC, EFLAGS); | |||
24155 | return IsStrict ? DAG.getMergeValues({Res, Chain}, dl) : Res; | |||
24156 | } | |||
24157 | ||||
24158 | // Handle floating point. | |||
24159 | X86::CondCode CondCode = TranslateX86CC(CC, dl, /*IsFP*/ true, Op0, Op1, DAG); | |||
24160 | if (CondCode == X86::COND_INVALID) | |||
24161 | return SDValue(); | |||
24162 | ||||
24163 | SDValue EFLAGS; | |||
24164 | if (IsStrict) { | |||
24165 | bool IsSignaling = Op.getOpcode() == ISD::STRICT_FSETCCS; | |||
24166 | EFLAGS = | |||
24167 | DAG.getNode(IsSignaling ? X86ISD::STRICT_FCMPS : X86ISD::STRICT_FCMP, | |||
24168 | dl, {MVT::i32, MVT::Other}, {Chain, Op0, Op1}); | |||
24169 | Chain = EFLAGS.getValue(1); | |||
24170 | } else { | |||
24171 | EFLAGS = DAG.getNode(X86ISD::FCMP, dl, MVT::i32, Op0, Op1); | |||
24172 | } | |||
24173 | ||||
24174 | SDValue X86CC = DAG.getTargetConstant(CondCode, dl, MVT::i8); | |||
24175 | SDValue Res = DAG.getNode(X86ISD::SETCC, dl, MVT::i8, X86CC, EFLAGS); | |||
24176 | return IsStrict ? DAG.getMergeValues({Res, Chain}, dl) : Res; | |||
24177 | } | |||
24178 | ||||
24179 | SDValue X86TargetLowering::LowerSETCCCARRY(SDValue Op, SelectionDAG &DAG) const { | |||
24180 | SDValue LHS = Op.getOperand(0); | |||
24181 | SDValue RHS = Op.getOperand(1); | |||
24182 | SDValue Carry = Op.getOperand(2); | |||
24183 | SDValue Cond = Op.getOperand(3); | |||
24184 | SDLoc DL(Op); | |||
24185 | ||||
24186 | assert(LHS.getSimpleValueType().isInteger() && "SETCCCARRY is integer only.")(static_cast <bool> (LHS.getSimpleValueType().isInteger () && "SETCCCARRY is integer only.") ? void (0) : __assert_fail ("LHS.getSimpleValueType().isInteger() && \"SETCCCARRY is integer only.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24186, __extension__ __PRETTY_FUNCTION__)); | |||
24187 | X86::CondCode CC = TranslateIntegerX86CC(cast<CondCodeSDNode>(Cond)->get()); | |||
24188 | ||||
24189 | // Recreate the carry if needed. | |||
24190 | EVT CarryVT = Carry.getValueType(); | |||
24191 | Carry = DAG.getNode(X86ISD::ADD, DL, DAG.getVTList(CarryVT, MVT::i32), | |||
24192 | Carry, DAG.getAllOnesConstant(DL, CarryVT)); | |||
24193 | ||||
24194 | SDVTList VTs = DAG.getVTList(LHS.getValueType(), MVT::i32); | |||
24195 | SDValue Cmp = DAG.getNode(X86ISD::SBB, DL, VTs, LHS, RHS, Carry.getValue(1)); | |||
24196 | return getSETCC(CC, Cmp.getValue(1), DL, DAG); | |||
24197 | } | |||
24198 | ||||
24199 | // This function returns three things: the arithmetic computation itself | |||
24200 | // (Value), an EFLAGS result (Overflow), and a condition code (Cond). The | |||
24201 | // flag and the condition code define the case in which the arithmetic | |||
24202 | // computation overflows. | |||
24203 | static std::pair<SDValue, SDValue> | |||
24204 | getX86XALUOOp(X86::CondCode &Cond, SDValue Op, SelectionDAG &DAG) { | |||
24205 | assert(Op.getResNo() == 0 && "Unexpected result number!")(static_cast <bool> (Op.getResNo() == 0 && "Unexpected result number!" ) ? void (0) : __assert_fail ("Op.getResNo() == 0 && \"Unexpected result number!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24205, __extension__ __PRETTY_FUNCTION__)); | |||
24206 | SDValue Value, Overflow; | |||
24207 | SDValue LHS = Op.getOperand(0); | |||
24208 | SDValue RHS = Op.getOperand(1); | |||
24209 | unsigned BaseOp = 0; | |||
24210 | SDLoc DL(Op); | |||
24211 | switch (Op.getOpcode()) { | |||
24212 | default: llvm_unreachable("Unknown ovf instruction!")::llvm::llvm_unreachable_internal("Unknown ovf instruction!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24212); | |||
24213 | case ISD::SADDO: | |||
24214 | BaseOp = X86ISD::ADD; | |||
24215 | Cond = X86::COND_O; | |||
24216 | break; | |||
24217 | case ISD::UADDO: | |||
24218 | BaseOp = X86ISD::ADD; | |||
24219 | Cond = isOneConstant(RHS) ? X86::COND_E : X86::COND_B; | |||
24220 | break; | |||
24221 | case ISD::SSUBO: | |||
24222 | BaseOp = X86ISD::SUB; | |||
24223 | Cond = X86::COND_O; | |||
24224 | break; | |||
24225 | case ISD::USUBO: | |||
24226 | BaseOp = X86ISD::SUB; | |||
24227 | Cond = X86::COND_B; | |||
24228 | break; | |||
24229 | case ISD::SMULO: | |||
24230 | BaseOp = X86ISD::SMUL; | |||
24231 | Cond = X86::COND_O; | |||
24232 | break; | |||
24233 | case ISD::UMULO: | |||
24234 | BaseOp = X86ISD::UMUL; | |||
24235 | Cond = X86::COND_O; | |||
24236 | break; | |||
24237 | } | |||
24238 | ||||
24239 | if (BaseOp) { | |||
24240 | // Also sets EFLAGS. | |||
24241 | SDVTList VTs = DAG.getVTList(Op.getValueType(), MVT::i32); | |||
24242 | Value = DAG.getNode(BaseOp, DL, VTs, LHS, RHS); | |||
24243 | Overflow = Value.getValue(1); | |||
24244 | } | |||
24245 | ||||
24246 | return std::make_pair(Value, Overflow); | |||
24247 | } | |||
24248 | ||||
24249 | static SDValue LowerXALUO(SDValue Op, SelectionDAG &DAG) { | |||
24250 | // Lower the "add/sub/mul with overflow" instruction into a regular ins plus | |||
24251 | // a "setcc" instruction that checks the overflow flag. The "brcond" lowering | |||
24252 | // looks for this combo and may remove the "setcc" instruction if the "setcc" | |||
24253 | // has only one use. | |||
24254 | SDLoc DL(Op); | |||
24255 | X86::CondCode Cond; | |||
24256 | SDValue Value, Overflow; | |||
24257 | std::tie(Value, Overflow) = getX86XALUOOp(Cond, Op, DAG); | |||
24258 | ||||
24259 | SDValue SetCC = getSETCC(Cond, Overflow, DL, DAG); | |||
24260 | assert(Op->getValueType(1) == MVT::i8 && "Unexpected VT!")(static_cast <bool> (Op->getValueType(1) == MVT::i8 && "Unexpected VT!") ? void (0) : __assert_fail ("Op->getValueType(1) == MVT::i8 && \"Unexpected VT!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24260, __extension__ __PRETTY_FUNCTION__)); | |||
24261 | return DAG.getNode(ISD::MERGE_VALUES, DL, Op->getVTList(), Value, SetCC); | |||
24262 | } | |||
24263 | ||||
24264 | /// Return true if opcode is a X86 logical comparison. | |||
24265 | static bool isX86LogicalCmp(SDValue Op) { | |||
24266 | unsigned Opc = Op.getOpcode(); | |||
24267 | if (Opc == X86ISD::CMP || Opc == X86ISD::COMI || Opc == X86ISD::UCOMI || | |||
24268 | Opc == X86ISD::FCMP) | |||
24269 | return true; | |||
24270 | if (Op.getResNo() == 1 && | |||
24271 | (Opc == X86ISD::ADD || Opc == X86ISD::SUB || Opc == X86ISD::ADC || | |||
24272 | Opc == X86ISD::SBB || Opc == X86ISD::SMUL || Opc == X86ISD::UMUL || | |||
24273 | Opc == X86ISD::OR || Opc == X86ISD::XOR || Opc == X86ISD::AND)) | |||
24274 | return true; | |||
24275 | ||||
24276 | return false; | |||
24277 | } | |||
24278 | ||||
24279 | static bool isTruncWithZeroHighBitsInput(SDValue V, SelectionDAG &DAG) { | |||
24280 | if (V.getOpcode() != ISD::TRUNCATE) | |||
24281 | return false; | |||
24282 | ||||
24283 | SDValue VOp0 = V.getOperand(0); | |||
24284 | unsigned InBits = VOp0.getValueSizeInBits(); | |||
24285 | unsigned Bits = V.getValueSizeInBits(); | |||
24286 | return DAG.MaskedValueIsZero(VOp0, APInt::getHighBitsSet(InBits,InBits-Bits)); | |||
24287 | } | |||
24288 | ||||
24289 | SDValue X86TargetLowering::LowerSELECT(SDValue Op, SelectionDAG &DAG) const { | |||
24290 | bool AddTest = true; | |||
24291 | SDValue Cond = Op.getOperand(0); | |||
24292 | SDValue Op1 = Op.getOperand(1); | |||
24293 | SDValue Op2 = Op.getOperand(2); | |||
24294 | SDLoc DL(Op); | |||
24295 | MVT VT = Op1.getSimpleValueType(); | |||
24296 | SDValue CC; | |||
24297 | ||||
24298 | // Lower FP selects into a CMP/AND/ANDN/OR sequence when the necessary SSE ops | |||
24299 | // are available or VBLENDV if AVX is available. | |||
24300 | // Otherwise FP cmovs get lowered into a less efficient branch sequence later. | |||
24301 | if (Cond.getOpcode() == ISD::SETCC && isScalarFPTypeInSSEReg(VT) && | |||
24302 | VT == Cond.getOperand(0).getSimpleValueType() && Cond->hasOneUse()) { | |||
24303 | SDValue CondOp0 = Cond.getOperand(0), CondOp1 = Cond.getOperand(1); | |||
24304 | bool IsAlwaysSignaling; | |||
24305 | unsigned SSECC = | |||
24306 | translateX86FSETCC(cast<CondCodeSDNode>(Cond.getOperand(2))->get(), | |||
24307 | CondOp0, CondOp1, IsAlwaysSignaling); | |||
24308 | ||||
24309 | if (Subtarget.hasAVX512()) { | |||
24310 | SDValue Cmp = | |||
24311 | DAG.getNode(X86ISD::FSETCCM, DL, MVT::v1i1, CondOp0, CondOp1, | |||
24312 | DAG.getTargetConstant(SSECC, DL, MVT::i8)); | |||
24313 | assert(!VT.isVector() && "Not a scalar type?")(static_cast <bool> (!VT.isVector() && "Not a scalar type?" ) ? void (0) : __assert_fail ("!VT.isVector() && \"Not a scalar type?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24313, __extension__ __PRETTY_FUNCTION__)); | |||
24314 | return DAG.getNode(X86ISD::SELECTS, DL, VT, Cmp, Op1, Op2); | |||
24315 | } | |||
24316 | ||||
24317 | if (SSECC < 8 || Subtarget.hasAVX()) { | |||
24318 | SDValue Cmp = DAG.getNode(X86ISD::FSETCC, DL, VT, CondOp0, CondOp1, | |||
24319 | DAG.getTargetConstant(SSECC, DL, MVT::i8)); | |||
24320 | ||||
24321 | // If we have AVX, we can use a variable vector select (VBLENDV) instead | |||
24322 | // of 3 logic instructions for size savings and potentially speed. | |||
24323 | // Unfortunately, there is no scalar form of VBLENDV. | |||
24324 | ||||
24325 | // If either operand is a +0.0 constant, don't try this. We can expect to | |||
24326 | // optimize away at least one of the logic instructions later in that | |||
24327 | // case, so that sequence would be faster than a variable blend. | |||
24328 | ||||
24329 | // BLENDV was introduced with SSE 4.1, but the 2 register form implicitly | |||
24330 | // uses XMM0 as the selection register. That may need just as many | |||
24331 | // instructions as the AND/ANDN/OR sequence due to register moves, so | |||
24332 | // don't bother. | |||
24333 | if (Subtarget.hasAVX() && !isNullFPConstant(Op1) && | |||
24334 | !isNullFPConstant(Op2)) { | |||
24335 | // Convert to vectors, do a VSELECT, and convert back to scalar. | |||
24336 | // All of the conversions should be optimized away. | |||
24337 | MVT VecVT = VT == MVT::f32 ? MVT::v4f32 : MVT::v2f64; | |||
24338 | SDValue VOp1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, DL, VecVT, Op1); | |||
24339 | SDValue VOp2 = DAG.getNode(ISD::SCALAR_TO_VECTOR, DL, VecVT, Op2); | |||
24340 | SDValue VCmp = DAG.getNode(ISD::SCALAR_TO_VECTOR, DL, VecVT, Cmp); | |||
24341 | ||||
24342 | MVT VCmpVT = VT == MVT::f32 ? MVT::v4i32 : MVT::v2i64; | |||
24343 | VCmp = DAG.getBitcast(VCmpVT, VCmp); | |||
24344 | ||||
24345 | SDValue VSel = DAG.getSelect(DL, VecVT, VCmp, VOp1, VOp2); | |||
24346 | ||||
24347 | return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, VT, | |||
24348 | VSel, DAG.getIntPtrConstant(0, DL)); | |||
24349 | } | |||
24350 | SDValue AndN = DAG.getNode(X86ISD::FANDN, DL, VT, Cmp, Op2); | |||
24351 | SDValue And = DAG.getNode(X86ISD::FAND, DL, VT, Cmp, Op1); | |||
24352 | return DAG.getNode(X86ISD::FOR, DL, VT, AndN, And); | |||
24353 | } | |||
24354 | } | |||
24355 | ||||
24356 | // AVX512 fallback is to lower selects of scalar floats to masked moves. | |||
24357 | if (isScalarFPTypeInSSEReg(VT) && Subtarget.hasAVX512()) { | |||
24358 | SDValue Cmp = DAG.getNode(ISD::SCALAR_TO_VECTOR, DL, MVT::v1i1, Cond); | |||
24359 | return DAG.getNode(X86ISD::SELECTS, DL, VT, Cmp, Op1, Op2); | |||
24360 | } | |||
24361 | ||||
24362 | if (Cond.getOpcode() == ISD::SETCC) { | |||
24363 | if (SDValue NewCond = LowerSETCC(Cond, DAG)) { | |||
24364 | Cond = NewCond; | |||
24365 | // If the condition was updated, it's possible that the operands of the | |||
24366 | // select were also updated (for example, EmitTest has a RAUW). Refresh | |||
24367 | // the local references to the select operands in case they got stale. | |||
24368 | Op1 = Op.getOperand(1); | |||
24369 | Op2 = Op.getOperand(2); | |||
24370 | } | |||
24371 | } | |||
24372 | ||||
24373 | // (select (x == 0), -1, y) -> (sign_bit (x - 1)) | y | |||
24374 | // (select (x == 0), y, -1) -> ~(sign_bit (x - 1)) | y | |||
24375 | // (select (x != 0), y, -1) -> (sign_bit (x - 1)) | y | |||
24376 | // (select (x != 0), -1, y) -> ~(sign_bit (x - 1)) | y | |||
24377 | // (select (and (x , 0x1) == 0), y, (z ^ y) ) -> (-(and (x , 0x1)) & z ) ^ y | |||
24378 | // (select (and (x , 0x1) == 0), y, (z | y) ) -> (-(and (x , 0x1)) & z ) | y | |||
24379 | if (Cond.getOpcode() == X86ISD::SETCC && | |||
24380 | Cond.getOperand(1).getOpcode() == X86ISD::CMP && | |||
24381 | isNullConstant(Cond.getOperand(1).getOperand(1))) { | |||
24382 | SDValue Cmp = Cond.getOperand(1); | |||
24383 | SDValue CmpOp0 = Cmp.getOperand(0); | |||
24384 | unsigned CondCode = Cond.getConstantOperandVal(0); | |||
24385 | ||||
24386 | // Special handling for __builtin_ffs(X) - 1 pattern which looks like | |||
24387 | // (select (seteq X, 0), -1, (cttz_zero_undef X)). Disable the special | |||
24388 | // handle to keep the CMP with 0. This should be removed by | |||
24389 | // optimizeCompareInst by using the flags from the BSR/TZCNT used for the | |||
24390 | // cttz_zero_undef. | |||
24391 | auto MatchFFSMinus1 = [&](SDValue Op1, SDValue Op2) { | |||
24392 | return (Op1.getOpcode() == ISD::CTTZ_ZERO_UNDEF && Op1.hasOneUse() && | |||
24393 | Op1.getOperand(0) == CmpOp0 && isAllOnesConstant(Op2)); | |||
24394 | }; | |||
24395 | if (Subtarget.hasCMov() && (VT == MVT::i32 || VT == MVT::i64) && | |||
24396 | ((CondCode == X86::COND_NE && MatchFFSMinus1(Op1, Op2)) || | |||
24397 | (CondCode == X86::COND_E && MatchFFSMinus1(Op2, Op1)))) { | |||
24398 | // Keep Cmp. | |||
24399 | } else if ((isAllOnesConstant(Op1) || isAllOnesConstant(Op2)) && | |||
24400 | (CondCode == X86::COND_E || CondCode == X86::COND_NE)) { | |||
24401 | SDValue Y = isAllOnesConstant(Op2) ? Op1 : Op2; | |||
24402 | ||||
24403 | SDVTList VTs = DAG.getVTList(Op.getValueType(), MVT::i32); | |||
24404 | SDVTList CmpVTs = DAG.getVTList(CmpOp0.getValueType(), MVT::i32); | |||
24405 | ||||
24406 | // Apply further optimizations for special cases | |||
24407 | // (select (x != 0), -1, 0) -> neg & sbb | |||
24408 | // (select (x == 0), 0, -1) -> neg & sbb | |||
24409 | if (isNullConstant(Y) && | |||
24410 | (isAllOnesConstant(Op1) == (CondCode == X86::COND_NE))) { | |||
24411 | SDValue Zero = DAG.getConstant(0, DL, CmpOp0.getValueType()); | |||
24412 | SDValue Neg = DAG.getNode(X86ISD::SUB, DL, CmpVTs, Zero, CmpOp0); | |||
24413 | Zero = DAG.getConstant(0, DL, Op.getValueType()); | |||
24414 | return DAG.getNode(X86ISD::SBB, DL, VTs, Zero, Zero, Neg.getValue(1)); | |||
24415 | } | |||
24416 | ||||
24417 | Cmp = DAG.getNode(X86ISD::SUB, DL, CmpVTs, | |||
24418 | CmpOp0, DAG.getConstant(1, DL, CmpOp0.getValueType())); | |||
24419 | ||||
24420 | SDValue Zero = DAG.getConstant(0, DL, Op.getValueType()); | |||
24421 | SDValue Res = // Res = 0 or -1. | |||
24422 | DAG.getNode(X86ISD::SBB, DL, VTs, Zero, Zero, Cmp.getValue(1)); | |||
24423 | ||||
24424 | if (isAllOnesConstant(Op1) != (CondCode == X86::COND_E)) | |||
24425 | Res = DAG.getNOT(DL, Res, Res.getValueType()); | |||
24426 | ||||
24427 | return DAG.getNode(ISD::OR, DL, Res.getValueType(), Res, Y); | |||
24428 | } else if (!Subtarget.hasCMov() && CondCode == X86::COND_E && | |||
24429 | Cmp.getOperand(0).getOpcode() == ISD::AND && | |||
24430 | isOneConstant(Cmp.getOperand(0).getOperand(1))) { | |||
24431 | SDValue Src1, Src2; | |||
24432 | // true if Op2 is XOR or OR operator and one of its operands | |||
24433 | // is equal to Op1 | |||
24434 | // ( a , a op b) || ( b , a op b) | |||
24435 | auto isOrXorPattern = [&]() { | |||
24436 | if ((Op2.getOpcode() == ISD::XOR || Op2.getOpcode() == ISD::OR) && | |||
24437 | (Op2.getOperand(0) == Op1 || Op2.getOperand(1) == Op1)) { | |||
24438 | Src1 = | |||
24439 | Op2.getOperand(0) == Op1 ? Op2.getOperand(1) : Op2.getOperand(0); | |||
24440 | Src2 = Op1; | |||
24441 | return true; | |||
24442 | } | |||
24443 | return false; | |||
24444 | }; | |||
24445 | ||||
24446 | if (isOrXorPattern()) { | |||
24447 | SDValue Neg; | |||
24448 | unsigned int CmpSz = CmpOp0.getSimpleValueType().getSizeInBits(); | |||
24449 | // we need mask of all zeros or ones with same size of the other | |||
24450 | // operands. | |||
24451 | if (CmpSz > VT.getSizeInBits()) | |||
24452 | Neg = DAG.getNode(ISD::TRUNCATE, DL, VT, CmpOp0); | |||
24453 | else if (CmpSz < VT.getSizeInBits()) | |||
24454 | Neg = DAG.getNode(ISD::AND, DL, VT, | |||
24455 | DAG.getNode(ISD::ANY_EXTEND, DL, VT, CmpOp0.getOperand(0)), | |||
24456 | DAG.getConstant(1, DL, VT)); | |||
24457 | else | |||
24458 | Neg = CmpOp0; | |||
24459 | SDValue Mask = DAG.getNode(ISD::SUB, DL, VT, DAG.getConstant(0, DL, VT), | |||
24460 | Neg); // -(and (x, 0x1)) | |||
24461 | SDValue And = DAG.getNode(ISD::AND, DL, VT, Mask, Src1); // Mask & z | |||
24462 | return DAG.getNode(Op2.getOpcode(), DL, VT, And, Src2); // And Op y | |||
24463 | } | |||
24464 | } | |||
24465 | } | |||
24466 | ||||
24467 | // Look past (and (setcc_carry (cmp ...)), 1). | |||
24468 | if (Cond.getOpcode() == ISD::AND && | |||
24469 | Cond.getOperand(0).getOpcode() == X86ISD::SETCC_CARRY && | |||
24470 | isOneConstant(Cond.getOperand(1))) | |||
24471 | Cond = Cond.getOperand(0); | |||
24472 | ||||
24473 | // If condition flag is set by a X86ISD::CMP, then use it as the condition | |||
24474 | // setting operand in place of the X86ISD::SETCC. | |||
24475 | unsigned CondOpcode = Cond.getOpcode(); | |||
24476 | if (CondOpcode == X86ISD::SETCC || | |||
24477 | CondOpcode == X86ISD::SETCC_CARRY) { | |||
24478 | CC = Cond.getOperand(0); | |||
24479 | ||||
24480 | SDValue Cmp = Cond.getOperand(1); | |||
24481 | bool IllegalFPCMov = false; | |||
24482 | if (VT.isFloatingPoint() && !VT.isVector() && | |||
24483 | !isScalarFPTypeInSSEReg(VT) && Subtarget.hasCMov()) // FPStack? | |||
24484 | IllegalFPCMov = !hasFPCMov(cast<ConstantSDNode>(CC)->getSExtValue()); | |||
24485 | ||||
24486 | if ((isX86LogicalCmp(Cmp) && !IllegalFPCMov) || | |||
24487 | Cmp.getOpcode() == X86ISD::BT) { // FIXME | |||
24488 | Cond = Cmp; | |||
24489 | AddTest = false; | |||
24490 | } | |||
24491 | } else if (CondOpcode == ISD::USUBO || CondOpcode == ISD::SSUBO || | |||
24492 | CondOpcode == ISD::UADDO || CondOpcode == ISD::SADDO || | |||
24493 | CondOpcode == ISD::UMULO || CondOpcode == ISD::SMULO) { | |||
24494 | SDValue Value; | |||
24495 | X86::CondCode X86Cond; | |||
24496 | std::tie(Value, Cond) = getX86XALUOOp(X86Cond, Cond.getValue(0), DAG); | |||
24497 | ||||
24498 | CC = DAG.getTargetConstant(X86Cond, DL, MVT::i8); | |||
24499 | AddTest = false; | |||
24500 | } | |||
24501 | ||||
24502 | if (AddTest) { | |||
24503 | // Look past the truncate if the high bits are known zero. | |||
24504 | if (isTruncWithZeroHighBitsInput(Cond, DAG)) | |||
24505 | Cond = Cond.getOperand(0); | |||
24506 | ||||
24507 | // We know the result of AND is compared against zero. Try to match | |||
24508 | // it to BT. | |||
24509 | if (Cond.getOpcode() == ISD::AND && Cond.hasOneUse()) { | |||
24510 | SDValue BTCC; | |||
24511 | if (SDValue BT = LowerAndToBT(Cond, ISD::SETNE, DL, DAG, BTCC)) { | |||
24512 | CC = BTCC; | |||
24513 | Cond = BT; | |||
24514 | AddTest = false; | |||
24515 | } | |||
24516 | } | |||
24517 | } | |||
24518 | ||||
24519 | if (AddTest) { | |||
24520 | CC = DAG.getTargetConstant(X86::COND_NE, DL, MVT::i8); | |||
24521 | Cond = EmitTest(Cond, X86::COND_NE, DL, DAG, Subtarget); | |||
24522 | } | |||
24523 | ||||
24524 | // a < b ? -1 : 0 -> RES = ~setcc_carry | |||
24525 | // a < b ? 0 : -1 -> RES = setcc_carry | |||
24526 | // a >= b ? -1 : 0 -> RES = setcc_carry | |||
24527 | // a >= b ? 0 : -1 -> RES = ~setcc_carry | |||
24528 | if (Cond.getOpcode() == X86ISD::SUB) { | |||
24529 | unsigned CondCode = cast<ConstantSDNode>(CC)->getZExtValue(); | |||
24530 | ||||
24531 | if ((CondCode == X86::COND_AE || CondCode == X86::COND_B) && | |||
24532 | (isAllOnesConstant(Op1) || isAllOnesConstant(Op2)) && | |||
24533 | (isNullConstant(Op1) || isNullConstant(Op2))) { | |||
24534 | SDValue Res = | |||
24535 | DAG.getNode(X86ISD::SETCC_CARRY, DL, Op.getValueType(), | |||
24536 | DAG.getTargetConstant(X86::COND_B, DL, MVT::i8), Cond); | |||
24537 | if (isAllOnesConstant(Op1) != (CondCode == X86::COND_B)) | |||
24538 | return DAG.getNOT(DL, Res, Res.getValueType()); | |||
24539 | return Res; | |||
24540 | } | |||
24541 | } | |||
24542 | ||||
24543 | // X86 doesn't have an i8 cmov. If both operands are the result of a truncate | |||
24544 | // widen the cmov and push the truncate through. This avoids introducing a new | |||
24545 | // branch during isel and doesn't add any extensions. | |||
24546 | if (Op.getValueType() == MVT::i8 && | |||
24547 | Op1.getOpcode() == ISD::TRUNCATE && Op2.getOpcode() == ISD::TRUNCATE) { | |||
24548 | SDValue T1 = Op1.getOperand(0), T2 = Op2.getOperand(0); | |||
24549 | if (T1.getValueType() == T2.getValueType() && | |||
24550 | // Exclude CopyFromReg to avoid partial register stalls. | |||
24551 | T1.getOpcode() != ISD::CopyFromReg && T2.getOpcode()!=ISD::CopyFromReg){ | |||
24552 | SDValue Cmov = DAG.getNode(X86ISD::CMOV, DL, T1.getValueType(), T2, T1, | |||
24553 | CC, Cond); | |||
24554 | return DAG.getNode(ISD::TRUNCATE, DL, Op.getValueType(), Cmov); | |||
24555 | } | |||
24556 | } | |||
24557 | ||||
24558 | // Or finally, promote i8 cmovs if we have CMOV, | |||
24559 | // or i16 cmovs if it won't prevent folding a load. | |||
24560 | // FIXME: we should not limit promotion of i8 case to only when the CMOV is | |||
24561 | // legal, but EmitLoweredSelect() can not deal with these extensions | |||
24562 | // being inserted between two CMOV's. (in i16 case too TBN) | |||
24563 | // https://bugs.llvm.org/show_bug.cgi?id=40974 | |||
24564 | if ((Op.getValueType() == MVT::i8 && Subtarget.hasCMov()) || | |||
24565 | (Op.getValueType() == MVT::i16 && !MayFoldLoad(Op1) && | |||
24566 | !MayFoldLoad(Op2))) { | |||
24567 | Op1 = DAG.getNode(ISD::ANY_EXTEND, DL, MVT::i32, Op1); | |||
24568 | Op2 = DAG.getNode(ISD::ANY_EXTEND, DL, MVT::i32, Op2); | |||
24569 | SDValue Ops[] = { Op2, Op1, CC, Cond }; | |||
24570 | SDValue Cmov = DAG.getNode(X86ISD::CMOV, DL, MVT::i32, Ops); | |||
24571 | return DAG.getNode(ISD::TRUNCATE, DL, Op.getValueType(), Cmov); | |||
24572 | } | |||
24573 | ||||
24574 | // X86ISD::CMOV means set the result (which is operand 1) to the RHS if | |||
24575 | // condition is true. | |||
24576 | SDValue Ops[] = { Op2, Op1, CC, Cond }; | |||
24577 | return DAG.getNode(X86ISD::CMOV, DL, Op.getValueType(), Ops); | |||
24578 | } | |||
24579 | ||||
24580 | static SDValue LowerSIGN_EXTEND_Mask(SDValue Op, | |||
24581 | const X86Subtarget &Subtarget, | |||
24582 | SelectionDAG &DAG) { | |||
24583 | MVT VT = Op->getSimpleValueType(0); | |||
24584 | SDValue In = Op->getOperand(0); | |||
24585 | MVT InVT = In.getSimpleValueType(); | |||
24586 | assert(InVT.getVectorElementType() == MVT::i1 && "Unexpected input type!")(static_cast <bool> (InVT.getVectorElementType() == MVT ::i1 && "Unexpected input type!") ? void (0) : __assert_fail ("InVT.getVectorElementType() == MVT::i1 && \"Unexpected input type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24586, __extension__ __PRETTY_FUNCTION__)); | |||
24587 | MVT VTElt = VT.getVectorElementType(); | |||
24588 | SDLoc dl(Op); | |||
24589 | ||||
24590 | unsigned NumElts = VT.getVectorNumElements(); | |||
24591 | ||||
24592 | // Extend VT if the scalar type is i8/i16 and BWI is not supported. | |||
24593 | MVT ExtVT = VT; | |||
24594 | if (!Subtarget.hasBWI() && VTElt.getSizeInBits() <= 16) { | |||
24595 | // If v16i32 is to be avoided, we'll need to split and concatenate. | |||
24596 | if (NumElts == 16 && !Subtarget.canExtendTo512DQ()) | |||
24597 | return SplitAndExtendv16i1(Op.getOpcode(), VT, In, dl, DAG); | |||
24598 | ||||
24599 | ExtVT = MVT::getVectorVT(MVT::i32, NumElts); | |||
24600 | } | |||
24601 | ||||
24602 | // Widen to 512-bits if VLX is not supported. | |||
24603 | MVT WideVT = ExtVT; | |||
24604 | if (!ExtVT.is512BitVector() && !Subtarget.hasVLX()) { | |||
24605 | NumElts *= 512 / ExtVT.getSizeInBits(); | |||
24606 | InVT = MVT::getVectorVT(MVT::i1, NumElts); | |||
24607 | In = DAG.getNode(ISD::INSERT_SUBVECTOR, dl, InVT, DAG.getUNDEF(InVT), | |||
24608 | In, DAG.getIntPtrConstant(0, dl)); | |||
24609 | WideVT = MVT::getVectorVT(ExtVT.getVectorElementType(), NumElts); | |||
24610 | } | |||
24611 | ||||
24612 | SDValue V; | |||
24613 | MVT WideEltVT = WideVT.getVectorElementType(); | |||
24614 | if ((Subtarget.hasDQI() && WideEltVT.getSizeInBits() >= 32) || | |||
24615 | (Subtarget.hasBWI() && WideEltVT.getSizeInBits() <= 16)) { | |||
24616 | V = DAG.getNode(Op.getOpcode(), dl, WideVT, In); | |||
24617 | } else { | |||
24618 | SDValue NegOne = DAG.getConstant(-1, dl, WideVT); | |||
24619 | SDValue Zero = DAG.getConstant(0, dl, WideVT); | |||
24620 | V = DAG.getSelect(dl, WideVT, In, NegOne, Zero); | |||
24621 | } | |||
24622 | ||||
24623 | // Truncate if we had to extend i16/i8 above. | |||
24624 | if (VT != ExtVT) { | |||
24625 | WideVT = MVT::getVectorVT(VTElt, NumElts); | |||
24626 | V = DAG.getNode(ISD::TRUNCATE, dl, WideVT, V); | |||
24627 | } | |||
24628 | ||||
24629 | // Extract back to 128/256-bit if we widened. | |||
24630 | if (WideVT != VT) | |||
24631 | V = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT, V, | |||
24632 | DAG.getIntPtrConstant(0, dl)); | |||
24633 | ||||
24634 | return V; | |||
24635 | } | |||
24636 | ||||
24637 | static SDValue LowerANY_EXTEND(SDValue Op, const X86Subtarget &Subtarget, | |||
24638 | SelectionDAG &DAG) { | |||
24639 | SDValue In = Op->getOperand(0); | |||
24640 | MVT InVT = In.getSimpleValueType(); | |||
24641 | ||||
24642 | if (InVT.getVectorElementType() == MVT::i1) | |||
24643 | return LowerSIGN_EXTEND_Mask(Op, Subtarget, DAG); | |||
24644 | ||||
24645 | assert(Subtarget.hasAVX() && "Expected AVX support")(static_cast <bool> (Subtarget.hasAVX() && "Expected AVX support" ) ? void (0) : __assert_fail ("Subtarget.hasAVX() && \"Expected AVX support\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24645, __extension__ __PRETTY_FUNCTION__)); | |||
24646 | return LowerAVXExtend(Op, DAG, Subtarget); | |||
24647 | } | |||
24648 | ||||
24649 | // Lowering for SIGN_EXTEND_VECTOR_INREG and ZERO_EXTEND_VECTOR_INREG. | |||
24650 | // For sign extend this needs to handle all vector sizes and SSE4.1 and | |||
24651 | // non-SSE4.1 targets. For zero extend this should only handle inputs of | |||
24652 | // MVT::v64i8 when BWI is not supported, but AVX512 is. | |||
24653 | static SDValue LowerEXTEND_VECTOR_INREG(SDValue Op, | |||
24654 | const X86Subtarget &Subtarget, | |||
24655 | SelectionDAG &DAG) { | |||
24656 | SDValue In = Op->getOperand(0); | |||
24657 | MVT VT = Op->getSimpleValueType(0); | |||
24658 | MVT InVT = In.getSimpleValueType(); | |||
24659 | ||||
24660 | MVT SVT = VT.getVectorElementType(); | |||
24661 | MVT InSVT = InVT.getVectorElementType(); | |||
24662 | assert(SVT.getFixedSizeInBits() > InSVT.getFixedSizeInBits())(static_cast <bool> (SVT.getFixedSizeInBits() > InSVT .getFixedSizeInBits()) ? void (0) : __assert_fail ("SVT.getFixedSizeInBits() > InSVT.getFixedSizeInBits()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24662, __extension__ __PRETTY_FUNCTION__)); | |||
24663 | ||||
24664 | if (SVT != MVT::i64 && SVT != MVT::i32 && SVT != MVT::i16) | |||
24665 | return SDValue(); | |||
24666 | if (InSVT != MVT::i32 && InSVT != MVT::i16 && InSVT != MVT::i8) | |||
24667 | return SDValue(); | |||
24668 | if (!(VT.is128BitVector() && Subtarget.hasSSE2()) && | |||
24669 | !(VT.is256BitVector() && Subtarget.hasAVX()) && | |||
24670 | !(VT.is512BitVector() && Subtarget.hasAVX512())) | |||
24671 | return SDValue(); | |||
24672 | ||||
24673 | SDLoc dl(Op); | |||
24674 | unsigned Opc = Op.getOpcode(); | |||
24675 | unsigned NumElts = VT.getVectorNumElements(); | |||
24676 | ||||
24677 | // For 256-bit vectors, we only need the lower (128-bit) half of the input. | |||
24678 | // For 512-bit vectors, we need 128-bits or 256-bits. | |||
24679 | if (InVT.getSizeInBits() > 128) { | |||
24680 | // Input needs to be at least the same number of elements as output, and | |||
24681 | // at least 128-bits. | |||
24682 | int InSize = InSVT.getSizeInBits() * NumElts; | |||
24683 | In = extractSubVector(In, 0, DAG, dl, std::max(InSize, 128)); | |||
24684 | InVT = In.getSimpleValueType(); | |||
24685 | } | |||
24686 | ||||
24687 | // SSE41 targets can use the pmov[sz]x* instructions directly for 128-bit results, | |||
24688 | // so are legal and shouldn't occur here. AVX2/AVX512 pmovsx* instructions still | |||
24689 | // need to be handled here for 256/512-bit results. | |||
24690 | if (Subtarget.hasInt256()) { | |||
24691 | assert(VT.getSizeInBits() > 128 && "Unexpected 128-bit vector extension")(static_cast <bool> (VT.getSizeInBits() > 128 && "Unexpected 128-bit vector extension") ? void (0) : __assert_fail ("VT.getSizeInBits() > 128 && \"Unexpected 128-bit vector extension\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24691, __extension__ __PRETTY_FUNCTION__)); | |||
24692 | ||||
24693 | if (InVT.getVectorNumElements() != NumElts) | |||
24694 | return DAG.getNode(Op.getOpcode(), dl, VT, In); | |||
24695 | ||||
24696 | // FIXME: Apparently we create inreg operations that could be regular | |||
24697 | // extends. | |||
24698 | unsigned ExtOpc = | |||
24699 | Opc == ISD::SIGN_EXTEND_VECTOR_INREG ? ISD::SIGN_EXTEND | |||
24700 | : ISD::ZERO_EXTEND; | |||
24701 | return DAG.getNode(ExtOpc, dl, VT, In); | |||
24702 | } | |||
24703 | ||||
24704 | // pre-AVX2 256-bit extensions need to be split into 128-bit instructions. | |||
24705 | if (Subtarget.hasAVX()) { | |||
24706 | assert(VT.is256BitVector() && "256-bit vector expected")(static_cast <bool> (VT.is256BitVector() && "256-bit vector expected" ) ? void (0) : __assert_fail ("VT.is256BitVector() && \"256-bit vector expected\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24706, __extension__ __PRETTY_FUNCTION__)); | |||
24707 | MVT HalfVT = VT.getHalfNumVectorElementsVT(); | |||
24708 | int HalfNumElts = HalfVT.getVectorNumElements(); | |||
24709 | ||||
24710 | unsigned NumSrcElts = InVT.getVectorNumElements(); | |||
24711 | SmallVector<int, 16> HiMask(NumSrcElts, SM_SentinelUndef); | |||
24712 | for (int i = 0; i != HalfNumElts; ++i) | |||
24713 | HiMask[i] = HalfNumElts + i; | |||
24714 | ||||
24715 | SDValue Lo = DAG.getNode(Opc, dl, HalfVT, In); | |||
24716 | SDValue Hi = DAG.getVectorShuffle(InVT, dl, In, DAG.getUNDEF(InVT), HiMask); | |||
24717 | Hi = DAG.getNode(Opc, dl, HalfVT, Hi); | |||
24718 | return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, Lo, Hi); | |||
24719 | } | |||
24720 | ||||
24721 | // We should only get here for sign extend. | |||
24722 | assert(Opc == ISD::SIGN_EXTEND_VECTOR_INREG && "Unexpected opcode!")(static_cast <bool> (Opc == ISD::SIGN_EXTEND_VECTOR_INREG && "Unexpected opcode!") ? void (0) : __assert_fail ( "Opc == ISD::SIGN_EXTEND_VECTOR_INREG && \"Unexpected opcode!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24722, __extension__ __PRETTY_FUNCTION__)); | |||
24723 | assert(VT.is128BitVector() && InVT.is128BitVector() && "Unexpected VTs")(static_cast <bool> (VT.is128BitVector() && InVT .is128BitVector() && "Unexpected VTs") ? void (0) : __assert_fail ("VT.is128BitVector() && InVT.is128BitVector() && \"Unexpected VTs\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24723, __extension__ __PRETTY_FUNCTION__)); | |||
24724 | ||||
24725 | // pre-SSE41 targets unpack lower lanes and then sign-extend using SRAI. | |||
24726 | SDValue Curr = In; | |||
24727 | SDValue SignExt = Curr; | |||
24728 | ||||
24729 | // As SRAI is only available on i16/i32 types, we expand only up to i32 | |||
24730 | // and handle i64 separately. | |||
24731 | if (InVT != MVT::v4i32) { | |||
24732 | MVT DestVT = VT == MVT::v2i64 ? MVT::v4i32 : VT; | |||
24733 | ||||
24734 | unsigned DestWidth = DestVT.getScalarSizeInBits(); | |||
24735 | unsigned Scale = DestWidth / InSVT.getSizeInBits(); | |||
24736 | ||||
24737 | unsigned InNumElts = InVT.getVectorNumElements(); | |||
24738 | unsigned DestElts = DestVT.getVectorNumElements(); | |||
24739 | ||||
24740 | // Build a shuffle mask that takes each input element and places it in the | |||
24741 | // MSBs of the new element size. | |||
24742 | SmallVector<int, 16> Mask(InNumElts, SM_SentinelUndef); | |||
24743 | for (unsigned i = 0; i != DestElts; ++i) | |||
24744 | Mask[i * Scale + (Scale - 1)] = i; | |||
24745 | ||||
24746 | Curr = DAG.getVectorShuffle(InVT, dl, In, In, Mask); | |||
24747 | Curr = DAG.getBitcast(DestVT, Curr); | |||
24748 | ||||
24749 | unsigned SignExtShift = DestWidth - InSVT.getSizeInBits(); | |||
24750 | SignExt = DAG.getNode(X86ISD::VSRAI, dl, DestVT, Curr, | |||
24751 | DAG.getTargetConstant(SignExtShift, dl, MVT::i8)); | |||
24752 | } | |||
24753 | ||||
24754 | if (VT == MVT::v2i64) { | |||
24755 | assert(Curr.getValueType() == MVT::v4i32 && "Unexpected input VT")(static_cast <bool> (Curr.getValueType() == MVT::v4i32 && "Unexpected input VT") ? void (0) : __assert_fail ("Curr.getValueType() == MVT::v4i32 && \"Unexpected input VT\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24755, __extension__ __PRETTY_FUNCTION__)); | |||
24756 | SDValue Zero = DAG.getConstant(0, dl, MVT::v4i32); | |||
24757 | SDValue Sign = DAG.getSetCC(dl, MVT::v4i32, Zero, Curr, ISD::SETGT); | |||
24758 | SignExt = DAG.getVectorShuffle(MVT::v4i32, dl, SignExt, Sign, {0, 4, 1, 5}); | |||
24759 | SignExt = DAG.getBitcast(VT, SignExt); | |||
24760 | } | |||
24761 | ||||
24762 | return SignExt; | |||
24763 | } | |||
24764 | ||||
24765 | static SDValue LowerSIGN_EXTEND(SDValue Op, const X86Subtarget &Subtarget, | |||
24766 | SelectionDAG &DAG) { | |||
24767 | MVT VT = Op->getSimpleValueType(0); | |||
24768 | SDValue In = Op->getOperand(0); | |||
24769 | MVT InVT = In.getSimpleValueType(); | |||
24770 | SDLoc dl(Op); | |||
24771 | ||||
24772 | if (InVT.getVectorElementType() == MVT::i1) | |||
24773 | return LowerSIGN_EXTEND_Mask(Op, Subtarget, DAG); | |||
24774 | ||||
24775 | assert(VT.isVector() && InVT.isVector() && "Expected vector type")(static_cast <bool> (VT.isVector() && InVT.isVector () && "Expected vector type") ? void (0) : __assert_fail ("VT.isVector() && InVT.isVector() && \"Expected vector type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24775, __extension__ __PRETTY_FUNCTION__)); | |||
24776 | assert(VT.getVectorNumElements() == InVT.getVectorNumElements() &&(static_cast <bool> (VT.getVectorNumElements() == InVT. getVectorNumElements() && "Expected same number of elements" ) ? void (0) : __assert_fail ("VT.getVectorNumElements() == InVT.getVectorNumElements() && \"Expected same number of elements\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24777, __extension__ __PRETTY_FUNCTION__)) | |||
24777 | "Expected same number of elements")(static_cast <bool> (VT.getVectorNumElements() == InVT. getVectorNumElements() && "Expected same number of elements" ) ? void (0) : __assert_fail ("VT.getVectorNumElements() == InVT.getVectorNumElements() && \"Expected same number of elements\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24777, __extension__ __PRETTY_FUNCTION__)); | |||
24778 | assert((VT.getVectorElementType() == MVT::i16 ||(static_cast <bool> ((VT.getVectorElementType() == MVT:: i16 || VT.getVectorElementType() == MVT::i32 || VT.getVectorElementType () == MVT::i64) && "Unexpected element type") ? void ( 0) : __assert_fail ("(VT.getVectorElementType() == MVT::i16 || VT.getVectorElementType() == MVT::i32 || VT.getVectorElementType() == MVT::i64) && \"Unexpected element type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24781, __extension__ __PRETTY_FUNCTION__)) | |||
24779 | VT.getVectorElementType() == MVT::i32 ||(static_cast <bool> ((VT.getVectorElementType() == MVT:: i16 || VT.getVectorElementType() == MVT::i32 || VT.getVectorElementType () == MVT::i64) && "Unexpected element type") ? void ( 0) : __assert_fail ("(VT.getVectorElementType() == MVT::i16 || VT.getVectorElementType() == MVT::i32 || VT.getVectorElementType() == MVT::i64) && \"Unexpected element type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24781, __extension__ __PRETTY_FUNCTION__)) | |||
24780 | VT.getVectorElementType() == MVT::i64) &&(static_cast <bool> ((VT.getVectorElementType() == MVT:: i16 || VT.getVectorElementType() == MVT::i32 || VT.getVectorElementType () == MVT::i64) && "Unexpected element type") ? void ( 0) : __assert_fail ("(VT.getVectorElementType() == MVT::i16 || VT.getVectorElementType() == MVT::i32 || VT.getVectorElementType() == MVT::i64) && \"Unexpected element type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24781, __extension__ __PRETTY_FUNCTION__)) | |||
24781 | "Unexpected element type")(static_cast <bool> ((VT.getVectorElementType() == MVT:: i16 || VT.getVectorElementType() == MVT::i32 || VT.getVectorElementType () == MVT::i64) && "Unexpected element type") ? void ( 0) : __assert_fail ("(VT.getVectorElementType() == MVT::i16 || VT.getVectorElementType() == MVT::i32 || VT.getVectorElementType() == MVT::i64) && \"Unexpected element type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24781, __extension__ __PRETTY_FUNCTION__)); | |||
24782 | assert((InVT.getVectorElementType() == MVT::i8 ||(static_cast <bool> ((InVT.getVectorElementType() == MVT ::i8 || InVT.getVectorElementType() == MVT::i16 || InVT.getVectorElementType () == MVT::i32) && "Unexpected element type") ? void ( 0) : __assert_fail ("(InVT.getVectorElementType() == MVT::i8 || InVT.getVectorElementType() == MVT::i16 || InVT.getVectorElementType() == MVT::i32) && \"Unexpected element type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24785, __extension__ __PRETTY_FUNCTION__)) | |||
24783 | InVT.getVectorElementType() == MVT::i16 ||(static_cast <bool> ((InVT.getVectorElementType() == MVT ::i8 || InVT.getVectorElementType() == MVT::i16 || InVT.getVectorElementType () == MVT::i32) && "Unexpected element type") ? void ( 0) : __assert_fail ("(InVT.getVectorElementType() == MVT::i8 || InVT.getVectorElementType() == MVT::i16 || InVT.getVectorElementType() == MVT::i32) && \"Unexpected element type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24785, __extension__ __PRETTY_FUNCTION__)) | |||
24784 | InVT.getVectorElementType() == MVT::i32) &&(static_cast <bool> ((InVT.getVectorElementType() == MVT ::i8 || InVT.getVectorElementType() == MVT::i16 || InVT.getVectorElementType () == MVT::i32) && "Unexpected element type") ? void ( 0) : __assert_fail ("(InVT.getVectorElementType() == MVT::i8 || InVT.getVectorElementType() == MVT::i16 || InVT.getVectorElementType() == MVT::i32) && \"Unexpected element type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24785, __extension__ __PRETTY_FUNCTION__)) | |||
24785 | "Unexpected element type")(static_cast <bool> ((InVT.getVectorElementType() == MVT ::i8 || InVT.getVectorElementType() == MVT::i16 || InVT.getVectorElementType () == MVT::i32) && "Unexpected element type") ? void ( 0) : __assert_fail ("(InVT.getVectorElementType() == MVT::i8 || InVT.getVectorElementType() == MVT::i16 || InVT.getVectorElementType() == MVT::i32) && \"Unexpected element type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24785, __extension__ __PRETTY_FUNCTION__)); | |||
24786 | ||||
24787 | if (VT == MVT::v32i16 && !Subtarget.hasBWI()) { | |||
24788 | assert(InVT == MVT::v32i8 && "Unexpected VT!")(static_cast <bool> (InVT == MVT::v32i8 && "Unexpected VT!" ) ? void (0) : __assert_fail ("InVT == MVT::v32i8 && \"Unexpected VT!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24788, __extension__ __PRETTY_FUNCTION__)); | |||
24789 | return splitVectorIntUnary(Op, DAG); | |||
24790 | } | |||
24791 | ||||
24792 | if (Subtarget.hasInt256()) | |||
24793 | return Op; | |||
24794 | ||||
24795 | // Optimize vectors in AVX mode | |||
24796 | // Sign extend v8i16 to v8i32 and | |||
24797 | // v4i32 to v4i64 | |||
24798 | // | |||
24799 | // Divide input vector into two parts | |||
24800 | // for v4i32 the high shuffle mask will be {2, 3, -1, -1} | |||
24801 | // use vpmovsx instruction to extend v4i32 -> v2i64; v8i16 -> v4i32 | |||
24802 | // concat the vectors to original VT | |||
24803 | MVT HalfVT = VT.getHalfNumVectorElementsVT(); | |||
24804 | SDValue OpLo = DAG.getNode(ISD::SIGN_EXTEND_VECTOR_INREG, dl, HalfVT, In); | |||
24805 | ||||
24806 | unsigned NumElems = InVT.getVectorNumElements(); | |||
24807 | SmallVector<int,8> ShufMask(NumElems, -1); | |||
24808 | for (unsigned i = 0; i != NumElems/2; ++i) | |||
24809 | ShufMask[i] = i + NumElems/2; | |||
24810 | ||||
24811 | SDValue OpHi = DAG.getVectorShuffle(InVT, dl, In, In, ShufMask); | |||
24812 | OpHi = DAG.getNode(ISD::SIGN_EXTEND_VECTOR_INREG, dl, HalfVT, OpHi); | |||
24813 | ||||
24814 | return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, OpLo, OpHi); | |||
24815 | } | |||
24816 | ||||
24817 | /// Change a vector store into a pair of half-size vector stores. | |||
24818 | static SDValue splitVectorStore(StoreSDNode *Store, SelectionDAG &DAG) { | |||
24819 | SDValue StoredVal = Store->getValue(); | |||
24820 | assert((StoredVal.getValueType().is256BitVector() ||(static_cast <bool> ((StoredVal.getValueType().is256BitVector () || StoredVal.getValueType().is512BitVector()) && "Expecting 256/512-bit op" ) ? void (0) : __assert_fail ("(StoredVal.getValueType().is256BitVector() || StoredVal.getValueType().is512BitVector()) && \"Expecting 256/512-bit op\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24822, __extension__ __PRETTY_FUNCTION__)) | |||
24821 | StoredVal.getValueType().is512BitVector()) &&(static_cast <bool> ((StoredVal.getValueType().is256BitVector () || StoredVal.getValueType().is512BitVector()) && "Expecting 256/512-bit op" ) ? void (0) : __assert_fail ("(StoredVal.getValueType().is256BitVector() || StoredVal.getValueType().is512BitVector()) && \"Expecting 256/512-bit op\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24822, __extension__ __PRETTY_FUNCTION__)) | |||
24822 | "Expecting 256/512-bit op")(static_cast <bool> ((StoredVal.getValueType().is256BitVector () || StoredVal.getValueType().is512BitVector()) && "Expecting 256/512-bit op" ) ? void (0) : __assert_fail ("(StoredVal.getValueType().is256BitVector() || StoredVal.getValueType().is512BitVector()) && \"Expecting 256/512-bit op\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24822, __extension__ __PRETTY_FUNCTION__)); | |||
24823 | ||||
24824 | // Splitting volatile memory ops is not allowed unless the operation was not | |||
24825 | // legal to begin with. Assume the input store is legal (this transform is | |||
24826 | // only used for targets with AVX). Note: It is possible that we have an | |||
24827 | // illegal type like v2i128, and so we could allow splitting a volatile store | |||
24828 | // in that case if that is important. | |||
24829 | if (!Store->isSimple()) | |||
24830 | return SDValue(); | |||
24831 | ||||
24832 | SDLoc DL(Store); | |||
24833 | SDValue Value0, Value1; | |||
24834 | std::tie(Value0, Value1) = splitVector(StoredVal, DAG, DL); | |||
24835 | unsigned HalfOffset = Value0.getValueType().getStoreSize(); | |||
24836 | SDValue Ptr0 = Store->getBasePtr(); | |||
24837 | SDValue Ptr1 = | |||
24838 | DAG.getMemBasePlusOffset(Ptr0, TypeSize::Fixed(HalfOffset), DL); | |||
24839 | SDValue Ch0 = | |||
24840 | DAG.getStore(Store->getChain(), DL, Value0, Ptr0, Store->getPointerInfo(), | |||
24841 | Store->getOriginalAlign(), | |||
24842 | Store->getMemOperand()->getFlags()); | |||
24843 | SDValue Ch1 = DAG.getStore(Store->getChain(), DL, Value1, Ptr1, | |||
24844 | Store->getPointerInfo().getWithOffset(HalfOffset), | |||
24845 | Store->getOriginalAlign(), | |||
24846 | Store->getMemOperand()->getFlags()); | |||
24847 | return DAG.getNode(ISD::TokenFactor, DL, MVT::Other, Ch0, Ch1); | |||
24848 | } | |||
24849 | ||||
24850 | /// Scalarize a vector store, bitcasting to TargetVT to determine the scalar | |||
24851 | /// type. | |||
24852 | static SDValue scalarizeVectorStore(StoreSDNode *Store, MVT StoreVT, | |||
24853 | SelectionDAG &DAG) { | |||
24854 | SDValue StoredVal = Store->getValue(); | |||
24855 | assert(StoreVT.is128BitVector() &&(static_cast <bool> (StoreVT.is128BitVector() && StoredVal.getValueType().is128BitVector() && "Expecting 128-bit op" ) ? void (0) : __assert_fail ("StoreVT.is128BitVector() && StoredVal.getValueType().is128BitVector() && \"Expecting 128-bit op\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24856, __extension__ __PRETTY_FUNCTION__)) | |||
24856 | StoredVal.getValueType().is128BitVector() && "Expecting 128-bit op")(static_cast <bool> (StoreVT.is128BitVector() && StoredVal.getValueType().is128BitVector() && "Expecting 128-bit op" ) ? void (0) : __assert_fail ("StoreVT.is128BitVector() && StoredVal.getValueType().is128BitVector() && \"Expecting 128-bit op\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24856, __extension__ __PRETTY_FUNCTION__)); | |||
24857 | StoredVal = DAG.getBitcast(StoreVT, StoredVal); | |||
24858 | ||||
24859 | // Splitting volatile memory ops is not allowed unless the operation was not | |||
24860 | // legal to begin with. We are assuming the input op is legal (this transform | |||
24861 | // is only used for targets with AVX). | |||
24862 | if (!Store->isSimple()) | |||
24863 | return SDValue(); | |||
24864 | ||||
24865 | MVT StoreSVT = StoreVT.getScalarType(); | |||
24866 | unsigned NumElems = StoreVT.getVectorNumElements(); | |||
24867 | unsigned ScalarSize = StoreSVT.getStoreSize(); | |||
24868 | ||||
24869 | SDLoc DL(Store); | |||
24870 | SmallVector<SDValue, 4> Stores; | |||
24871 | for (unsigned i = 0; i != NumElems; ++i) { | |||
24872 | unsigned Offset = i * ScalarSize; | |||
24873 | SDValue Ptr = DAG.getMemBasePlusOffset(Store->getBasePtr(), | |||
24874 | TypeSize::Fixed(Offset), DL); | |||
24875 | SDValue Scl = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, StoreSVT, StoredVal, | |||
24876 | DAG.getIntPtrConstant(i, DL)); | |||
24877 | SDValue Ch = DAG.getStore(Store->getChain(), DL, Scl, Ptr, | |||
24878 | Store->getPointerInfo().getWithOffset(Offset), | |||
24879 | Store->getOriginalAlign(), | |||
24880 | Store->getMemOperand()->getFlags()); | |||
24881 | Stores.push_back(Ch); | |||
24882 | } | |||
24883 | return DAG.getNode(ISD::TokenFactor, DL, MVT::Other, Stores); | |||
24884 | } | |||
24885 | ||||
24886 | static SDValue LowerStore(SDValue Op, const X86Subtarget &Subtarget, | |||
24887 | SelectionDAG &DAG) { | |||
24888 | StoreSDNode *St = cast<StoreSDNode>(Op.getNode()); | |||
24889 | SDLoc dl(St); | |||
24890 | SDValue StoredVal = St->getValue(); | |||
24891 | ||||
24892 | // Without AVX512DQ, we need to use a scalar type for v2i1/v4i1/v8i1 stores. | |||
24893 | if (StoredVal.getValueType().isVector() && | |||
24894 | StoredVal.getValueType().getVectorElementType() == MVT::i1) { | |||
24895 | unsigned NumElts = StoredVal.getValueType().getVectorNumElements(); | |||
24896 | assert(NumElts <= 8 && "Unexpected VT")(static_cast <bool> (NumElts <= 8 && "Unexpected VT" ) ? void (0) : __assert_fail ("NumElts <= 8 && \"Unexpected VT\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24896, __extension__ __PRETTY_FUNCTION__)); | |||
24897 | assert(!St->isTruncatingStore() && "Expected non-truncating store")(static_cast <bool> (!St->isTruncatingStore() && "Expected non-truncating store") ? void (0) : __assert_fail ( "!St->isTruncatingStore() && \"Expected non-truncating store\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24897, __extension__ __PRETTY_FUNCTION__)); | |||
24898 | assert(Subtarget.hasAVX512() && !Subtarget.hasDQI() &&(static_cast <bool> (Subtarget.hasAVX512() && ! Subtarget.hasDQI() && "Expected AVX512F without AVX512DQI" ) ? void (0) : __assert_fail ("Subtarget.hasAVX512() && !Subtarget.hasDQI() && \"Expected AVX512F without AVX512DQI\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24899, __extension__ __PRETTY_FUNCTION__)) | |||
24899 | "Expected AVX512F without AVX512DQI")(static_cast <bool> (Subtarget.hasAVX512() && ! Subtarget.hasDQI() && "Expected AVX512F without AVX512DQI" ) ? void (0) : __assert_fail ("Subtarget.hasAVX512() && !Subtarget.hasDQI() && \"Expected AVX512F without AVX512DQI\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24899, __extension__ __PRETTY_FUNCTION__)); | |||
24900 | ||||
24901 | // We must pad with zeros to ensure we store zeroes to any unused bits. | |||
24902 | StoredVal = DAG.getNode(ISD::INSERT_SUBVECTOR, dl, MVT::v16i1, | |||
24903 | DAG.getUNDEF(MVT::v16i1), StoredVal, | |||
24904 | DAG.getIntPtrConstant(0, dl)); | |||
24905 | StoredVal = DAG.getBitcast(MVT::i16, StoredVal); | |||
24906 | StoredVal = DAG.getNode(ISD::TRUNCATE, dl, MVT::i8, StoredVal); | |||
24907 | // Make sure we store zeros in the extra bits. | |||
24908 | if (NumElts < 8) | |||
24909 | StoredVal = DAG.getZeroExtendInReg( | |||
24910 | StoredVal, dl, EVT::getIntegerVT(*DAG.getContext(), NumElts)); | |||
24911 | ||||
24912 | return DAG.getStore(St->getChain(), dl, StoredVal, St->getBasePtr(), | |||
24913 | St->getPointerInfo(), St->getOriginalAlign(), | |||
24914 | St->getMemOperand()->getFlags()); | |||
24915 | } | |||
24916 | ||||
24917 | if (St->isTruncatingStore()) | |||
24918 | return SDValue(); | |||
24919 | ||||
24920 | // If this is a 256-bit store of concatenated ops, we are better off splitting | |||
24921 | // that store into two 128-bit stores. This avoids spurious use of 256-bit ops | |||
24922 | // and each half can execute independently. Some cores would split the op into | |||
24923 | // halves anyway, so the concat (vinsertf128) is purely an extra op. | |||
24924 | MVT StoreVT = StoredVal.getSimpleValueType(); | |||
24925 | if (StoreVT.is256BitVector() || | |||
24926 | ((StoreVT == MVT::v32i16 || StoreVT == MVT::v64i8) && | |||
24927 | !Subtarget.hasBWI())) { | |||
24928 | SmallVector<SDValue, 4> CatOps; | |||
24929 | if (StoredVal.hasOneUse() && collectConcatOps(StoredVal.getNode(), CatOps)) | |||
24930 | return splitVectorStore(St, DAG); | |||
24931 | return SDValue(); | |||
24932 | } | |||
24933 | ||||
24934 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
24935 | assert(StoreVT.isVector() && StoreVT.getSizeInBits() == 64 &&(static_cast <bool> (StoreVT.isVector() && StoreVT .getSizeInBits() == 64 && "Unexpected VT") ? void (0) : __assert_fail ("StoreVT.isVector() && StoreVT.getSizeInBits() == 64 && \"Unexpected VT\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24936, __extension__ __PRETTY_FUNCTION__)) | |||
24936 | "Unexpected VT")(static_cast <bool> (StoreVT.isVector() && StoreVT .getSizeInBits() == 64 && "Unexpected VT") ? void (0) : __assert_fail ("StoreVT.isVector() && StoreVT.getSizeInBits() == 64 && \"Unexpected VT\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24936, __extension__ __PRETTY_FUNCTION__)); | |||
24937 | assert(TLI.getTypeAction(*DAG.getContext(), StoreVT) ==(static_cast <bool> (TLI.getTypeAction(*DAG.getContext( ), StoreVT) == TargetLowering::TypeWidenVector && "Unexpected type action!" ) ? void (0) : __assert_fail ("TLI.getTypeAction(*DAG.getContext(), StoreVT) == TargetLowering::TypeWidenVector && \"Unexpected type action!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24938, __extension__ __PRETTY_FUNCTION__)) | |||
24938 | TargetLowering::TypeWidenVector && "Unexpected type action!")(static_cast <bool> (TLI.getTypeAction(*DAG.getContext( ), StoreVT) == TargetLowering::TypeWidenVector && "Unexpected type action!" ) ? void (0) : __assert_fail ("TLI.getTypeAction(*DAG.getContext(), StoreVT) == TargetLowering::TypeWidenVector && \"Unexpected type action!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24938, __extension__ __PRETTY_FUNCTION__)); | |||
24939 | ||||
24940 | EVT WideVT = TLI.getTypeToTransformTo(*DAG.getContext(), StoreVT); | |||
24941 | StoredVal = DAG.getNode(ISD::CONCAT_VECTORS, dl, WideVT, StoredVal, | |||
24942 | DAG.getUNDEF(StoreVT)); | |||
24943 | ||||
24944 | if (Subtarget.hasSSE2()) { | |||
24945 | // Widen the vector, cast to a v2x64 type, extract the single 64-bit element | |||
24946 | // and store it. | |||
24947 | MVT StVT = Subtarget.is64Bit() && StoreVT.isInteger() ? MVT::i64 : MVT::f64; | |||
24948 | MVT CastVT = MVT::getVectorVT(StVT, 2); | |||
24949 | StoredVal = DAG.getBitcast(CastVT, StoredVal); | |||
24950 | StoredVal = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, StVT, StoredVal, | |||
24951 | DAG.getIntPtrConstant(0, dl)); | |||
24952 | ||||
24953 | return DAG.getStore(St->getChain(), dl, StoredVal, St->getBasePtr(), | |||
24954 | St->getPointerInfo(), St->getOriginalAlign(), | |||
24955 | St->getMemOperand()->getFlags()); | |||
24956 | } | |||
24957 | assert(Subtarget.hasSSE1() && "Expected SSE")(static_cast <bool> (Subtarget.hasSSE1() && "Expected SSE" ) ? void (0) : __assert_fail ("Subtarget.hasSSE1() && \"Expected SSE\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24957, __extension__ __PRETTY_FUNCTION__)); | |||
24958 | SDVTList Tys = DAG.getVTList(MVT::Other); | |||
24959 | SDValue Ops[] = {St->getChain(), StoredVal, St->getBasePtr()}; | |||
24960 | return DAG.getMemIntrinsicNode(X86ISD::VEXTRACT_STORE, dl, Tys, Ops, MVT::i64, | |||
24961 | St->getMemOperand()); | |||
24962 | } | |||
24963 | ||||
24964 | // Lower vector extended loads using a shuffle. If SSSE3 is not available we | |||
24965 | // may emit an illegal shuffle but the expansion is still better than scalar | |||
24966 | // code. We generate sext/sext_invec for SEXTLOADs if it's available, otherwise | |||
24967 | // we'll emit a shuffle and a arithmetic shift. | |||
24968 | // FIXME: Is the expansion actually better than scalar code? It doesn't seem so. | |||
24969 | // TODO: It is possible to support ZExt by zeroing the undef values during | |||
24970 | // the shuffle phase or after the shuffle. | |||
24971 | static SDValue LowerLoad(SDValue Op, const X86Subtarget &Subtarget, | |||
24972 | SelectionDAG &DAG) { | |||
24973 | MVT RegVT = Op.getSimpleValueType(); | |||
24974 | assert(RegVT.isVector() && "We only custom lower vector loads.")(static_cast <bool> (RegVT.isVector() && "We only custom lower vector loads." ) ? void (0) : __assert_fail ("RegVT.isVector() && \"We only custom lower vector loads.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24974, __extension__ __PRETTY_FUNCTION__)); | |||
24975 | assert(RegVT.isInteger() &&(static_cast <bool> (RegVT.isInteger() && "We only custom lower integer vector loads." ) ? void (0) : __assert_fail ("RegVT.isInteger() && \"We only custom lower integer vector loads.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24976, __extension__ __PRETTY_FUNCTION__)) | |||
24976 | "We only custom lower integer vector loads.")(static_cast <bool> (RegVT.isInteger() && "We only custom lower integer vector loads." ) ? void (0) : __assert_fail ("RegVT.isInteger() && \"We only custom lower integer vector loads.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24976, __extension__ __PRETTY_FUNCTION__)); | |||
24977 | ||||
24978 | LoadSDNode *Ld = cast<LoadSDNode>(Op.getNode()); | |||
24979 | SDLoc dl(Ld); | |||
24980 | ||||
24981 | // Without AVX512DQ, we need to use a scalar type for v2i1/v4i1/v8i1 loads. | |||
24982 | if (RegVT.getVectorElementType() == MVT::i1) { | |||
24983 | assert(EVT(RegVT) == Ld->getMemoryVT() && "Expected non-extending load")(static_cast <bool> (EVT(RegVT) == Ld->getMemoryVT() && "Expected non-extending load") ? void (0) : __assert_fail ("EVT(RegVT) == Ld->getMemoryVT() && \"Expected non-extending load\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24983, __extension__ __PRETTY_FUNCTION__)); | |||
24984 | assert(RegVT.getVectorNumElements() <= 8 && "Unexpected VT")(static_cast <bool> (RegVT.getVectorNumElements() <= 8 && "Unexpected VT") ? void (0) : __assert_fail ("RegVT.getVectorNumElements() <= 8 && \"Unexpected VT\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24984, __extension__ __PRETTY_FUNCTION__)); | |||
24985 | assert(Subtarget.hasAVX512() && !Subtarget.hasDQI() &&(static_cast <bool> (Subtarget.hasAVX512() && ! Subtarget.hasDQI() && "Expected AVX512F without AVX512DQI" ) ? void (0) : __assert_fail ("Subtarget.hasAVX512() && !Subtarget.hasDQI() && \"Expected AVX512F without AVX512DQI\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24986, __extension__ __PRETTY_FUNCTION__)) | |||
24986 | "Expected AVX512F without AVX512DQI")(static_cast <bool> (Subtarget.hasAVX512() && ! Subtarget.hasDQI() && "Expected AVX512F without AVX512DQI" ) ? void (0) : __assert_fail ("Subtarget.hasAVX512() && !Subtarget.hasDQI() && \"Expected AVX512F without AVX512DQI\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24986, __extension__ __PRETTY_FUNCTION__)); | |||
24987 | ||||
24988 | SDValue NewLd = DAG.getLoad(MVT::i8, dl, Ld->getChain(), Ld->getBasePtr(), | |||
24989 | Ld->getPointerInfo(), Ld->getOriginalAlign(), | |||
24990 | Ld->getMemOperand()->getFlags()); | |||
24991 | ||||
24992 | // Replace chain users with the new chain. | |||
24993 | assert(NewLd->getNumValues() == 2 && "Loads must carry a chain!")(static_cast <bool> (NewLd->getNumValues() == 2 && "Loads must carry a chain!") ? void (0) : __assert_fail ("NewLd->getNumValues() == 2 && \"Loads must carry a chain!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 24993, __extension__ __PRETTY_FUNCTION__)); | |||
24994 | ||||
24995 | SDValue Val = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i16, NewLd); | |||
24996 | Val = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, RegVT, | |||
24997 | DAG.getBitcast(MVT::v16i1, Val), | |||
24998 | DAG.getIntPtrConstant(0, dl)); | |||
24999 | return DAG.getMergeValues({Val, NewLd.getValue(1)}, dl); | |||
25000 | } | |||
25001 | ||||
25002 | return SDValue(); | |||
25003 | } | |||
25004 | ||||
25005 | /// Return true if node is an ISD::AND or ISD::OR of two X86ISD::SETCC nodes | |||
25006 | /// each of which has no other use apart from the AND / OR. | |||
25007 | static bool isAndOrOfSetCCs(SDValue Op, unsigned &Opc) { | |||
25008 | Opc = Op.getOpcode(); | |||
25009 | if (Opc != ISD::OR && Opc != ISD::AND) | |||
25010 | return false; | |||
25011 | return (Op.getOperand(0).getOpcode() == X86ISD::SETCC && | |||
25012 | Op.getOperand(0).hasOneUse() && | |||
25013 | Op.getOperand(1).getOpcode() == X86ISD::SETCC && | |||
25014 | Op.getOperand(1).hasOneUse()); | |||
25015 | } | |||
25016 | ||||
25017 | SDValue X86TargetLowering::LowerBRCOND(SDValue Op, SelectionDAG &DAG) const { | |||
25018 | SDValue Chain = Op.getOperand(0); | |||
25019 | SDValue Cond = Op.getOperand(1); | |||
25020 | SDValue Dest = Op.getOperand(2); | |||
25021 | SDLoc dl(Op); | |||
25022 | ||||
25023 | if (Cond.getOpcode() == ISD::SETCC && | |||
25024 | Cond.getOperand(0).getValueType() != MVT::f128) { | |||
25025 | SDValue LHS = Cond.getOperand(0); | |||
25026 | SDValue RHS = Cond.getOperand(1); | |||
25027 | ISD::CondCode CC = cast<CondCodeSDNode>(Cond.getOperand(2))->get(); | |||
25028 | ||||
25029 | // Special case for | |||
25030 | // setcc([su]{add,sub,mul}o == 0) | |||
25031 | // setcc([su]{add,sub,mul}o != 1) | |||
25032 | if (ISD::isOverflowIntrOpRes(LHS) && | |||
25033 | (CC == ISD::SETEQ || CC == ISD::SETNE) && | |||
25034 | (isNullConstant(RHS) || isOneConstant(RHS))) { | |||
25035 | SDValue Value, Overflow; | |||
25036 | X86::CondCode X86Cond; | |||
25037 | std::tie(Value, Overflow) = getX86XALUOOp(X86Cond, LHS.getValue(0), DAG); | |||
25038 | ||||
25039 | if ((CC == ISD::SETEQ) == isNullConstant(RHS)) | |||
25040 | X86Cond = X86::GetOppositeBranchCondition(X86Cond); | |||
25041 | ||||
25042 | SDValue CCVal = DAG.getTargetConstant(X86Cond, dl, MVT::i8); | |||
25043 | return DAG.getNode(X86ISD::BRCOND, dl, MVT::Other, Chain, Dest, CCVal, | |||
25044 | Overflow); | |||
25045 | } | |||
25046 | ||||
25047 | if (LHS.getSimpleValueType().isInteger()) { | |||
25048 | SDValue CCVal; | |||
25049 | SDValue EFLAGS = emitFlagsForSetcc(LHS, RHS, CC, SDLoc(Cond), DAG, CCVal); | |||
25050 | return DAG.getNode(X86ISD::BRCOND, dl, MVT::Other, Chain, Dest, CCVal, | |||
25051 | EFLAGS); | |||
25052 | } | |||
25053 | ||||
25054 | if (CC == ISD::SETOEQ) { | |||
25055 | // For FCMP_OEQ, we can emit | |||
25056 | // two branches instead of an explicit AND instruction with a | |||
25057 | // separate test. However, we only do this if this block doesn't | |||
25058 | // have a fall-through edge, because this requires an explicit | |||
25059 | // jmp when the condition is false. | |||
25060 | if (Op.getNode()->hasOneUse()) { | |||
25061 | SDNode *User = *Op.getNode()->use_begin(); | |||
25062 | // Look for an unconditional branch following this conditional branch. | |||
25063 | // We need this because we need to reverse the successors in order | |||
25064 | // to implement FCMP_OEQ. | |||
25065 | if (User->getOpcode() == ISD::BR) { | |||
25066 | SDValue FalseBB = User->getOperand(1); | |||
25067 | SDNode *NewBR = | |||
25068 | DAG.UpdateNodeOperands(User, User->getOperand(0), Dest); | |||
25069 | assert(NewBR == User)(static_cast <bool> (NewBR == User) ? void (0) : __assert_fail ("NewBR == User", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 25069, __extension__ __PRETTY_FUNCTION__)); | |||
25070 | (void)NewBR; | |||
25071 | Dest = FalseBB; | |||
25072 | ||||
25073 | SDValue Cmp = | |||
25074 | DAG.getNode(X86ISD::FCMP, SDLoc(Cond), MVT::i32, LHS, RHS); | |||
25075 | SDValue CCVal = DAG.getTargetConstant(X86::COND_NE, dl, MVT::i8); | |||
25076 | Chain = DAG.getNode(X86ISD::BRCOND, dl, MVT::Other, Chain, Dest, | |||
25077 | CCVal, Cmp); | |||
25078 | CCVal = DAG.getTargetConstant(X86::COND_P, dl, MVT::i8); | |||
25079 | return DAG.getNode(X86ISD::BRCOND, dl, MVT::Other, Chain, Dest, CCVal, | |||
25080 | Cmp); | |||
25081 | } | |||
25082 | } | |||
25083 | } else if (CC == ISD::SETUNE) { | |||
25084 | // For FCMP_UNE, we can emit | |||
25085 | // two branches instead of an explicit OR instruction with a | |||
25086 | // separate test. | |||
25087 | SDValue Cmp = DAG.getNode(X86ISD::FCMP, SDLoc(Cond), MVT::i32, LHS, RHS); | |||
25088 | SDValue CCVal = DAG.getTargetConstant(X86::COND_NE, dl, MVT::i8); | |||
25089 | Chain = | |||
25090 | DAG.getNode(X86ISD::BRCOND, dl, MVT::Other, Chain, Dest, CCVal, Cmp); | |||
25091 | CCVal = DAG.getTargetConstant(X86::COND_P, dl, MVT::i8); | |||
25092 | return DAG.getNode(X86ISD::BRCOND, dl, MVT::Other, Chain, Dest, CCVal, | |||
25093 | Cmp); | |||
25094 | } else { | |||
25095 | X86::CondCode X86Cond = | |||
25096 | TranslateX86CC(CC, dl, /*IsFP*/ true, LHS, RHS, DAG); | |||
25097 | SDValue Cmp = DAG.getNode(X86ISD::FCMP, SDLoc(Cond), MVT::i32, LHS, RHS); | |||
25098 | SDValue CCVal = DAG.getTargetConstant(X86Cond, dl, MVT::i8); | |||
25099 | return DAG.getNode(X86ISD::BRCOND, dl, MVT::Other, Chain, Dest, CCVal, | |||
25100 | Cmp); | |||
25101 | } | |||
25102 | } | |||
25103 | ||||
25104 | if (ISD::isOverflowIntrOpRes(Cond)) { | |||
25105 | SDValue Value, Overflow; | |||
25106 | X86::CondCode X86Cond; | |||
25107 | std::tie(Value, Overflow) = getX86XALUOOp(X86Cond, Cond.getValue(0), DAG); | |||
25108 | ||||
25109 | SDValue CCVal = DAG.getTargetConstant(X86Cond, dl, MVT::i8); | |||
25110 | return DAG.getNode(X86ISD::BRCOND, dl, MVT::Other, Chain, Dest, CCVal, | |||
25111 | Overflow); | |||
25112 | } | |||
25113 | ||||
25114 | // Look past the truncate if the high bits are known zero. | |||
25115 | if (isTruncWithZeroHighBitsInput(Cond, DAG)) | |||
25116 | Cond = Cond.getOperand(0); | |||
25117 | ||||
25118 | EVT CondVT = Cond.getValueType(); | |||
25119 | ||||
25120 | // Add an AND with 1 if we don't already have one. | |||
25121 | if (!(Cond.getOpcode() == ISD::AND && isOneConstant(Cond.getOperand(1)))) | |||
25122 | Cond = | |||
25123 | DAG.getNode(ISD::AND, dl, CondVT, Cond, DAG.getConstant(1, dl, CondVT)); | |||
25124 | ||||
25125 | SDValue LHS = Cond; | |||
25126 | SDValue RHS = DAG.getConstant(0, dl, CondVT); | |||
25127 | ||||
25128 | SDValue CCVal; | |||
25129 | SDValue EFLAGS = emitFlagsForSetcc(LHS, RHS, ISD::SETNE, dl, DAG, CCVal); | |||
25130 | return DAG.getNode(X86ISD::BRCOND, dl, MVT::Other, Chain, Dest, CCVal, | |||
25131 | EFLAGS); | |||
25132 | } | |||
25133 | ||||
25134 | // Lower dynamic stack allocation to _alloca call for Cygwin/Mingw targets. | |||
25135 | // Calls to _alloca are needed to probe the stack when allocating more than 4k | |||
25136 | // bytes in one go. Touching the stack at 4K increments is necessary to ensure | |||
25137 | // that the guard pages used by the OS virtual memory manager are allocated in | |||
25138 | // correct sequence. | |||
25139 | SDValue | |||
25140 | X86TargetLowering::LowerDYNAMIC_STACKALLOC(SDValue Op, | |||
25141 | SelectionDAG &DAG) const { | |||
25142 | MachineFunction &MF = DAG.getMachineFunction(); | |||
25143 | bool SplitStack = MF.shouldSplitStack(); | |||
25144 | bool EmitStackProbeCall = hasStackProbeSymbol(MF); | |||
25145 | bool Lower = (Subtarget.isOSWindows() && !Subtarget.isTargetMachO()) || | |||
25146 | SplitStack || EmitStackProbeCall; | |||
25147 | SDLoc dl(Op); | |||
25148 | ||||
25149 | // Get the inputs. | |||
25150 | SDNode *Node = Op.getNode(); | |||
25151 | SDValue Chain = Op.getOperand(0); | |||
25152 | SDValue Size = Op.getOperand(1); | |||
25153 | MaybeAlign Alignment(Op.getConstantOperandVal(2)); | |||
25154 | EVT VT = Node->getValueType(0); | |||
25155 | ||||
25156 | // Chain the dynamic stack allocation so that it doesn't modify the stack | |||
25157 | // pointer when other instructions are using the stack. | |||
25158 | Chain = DAG.getCALLSEQ_START(Chain, 0, 0, dl); | |||
25159 | ||||
25160 | bool Is64Bit = Subtarget.is64Bit(); | |||
25161 | MVT SPTy = getPointerTy(DAG.getDataLayout()); | |||
25162 | ||||
25163 | SDValue Result; | |||
25164 | if (!Lower) { | |||
25165 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
25166 | Register SPReg = TLI.getStackPointerRegisterToSaveRestore(); | |||
25167 | assert(SPReg && "Target cannot require DYNAMIC_STACKALLOC expansion and"(static_cast <bool> (SPReg && "Target cannot require DYNAMIC_STACKALLOC expansion and" " not tell us which reg is the stack pointer!") ? void (0) : __assert_fail ("SPReg && \"Target cannot require DYNAMIC_STACKALLOC expansion and\" \" not tell us which reg is the stack pointer!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 25168, __extension__ __PRETTY_FUNCTION__)) | |||
25168 | " not tell us which reg is the stack pointer!")(static_cast <bool> (SPReg && "Target cannot require DYNAMIC_STACKALLOC expansion and" " not tell us which reg is the stack pointer!") ? void (0) : __assert_fail ("SPReg && \"Target cannot require DYNAMIC_STACKALLOC expansion and\" \" not tell us which reg is the stack pointer!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 25168, __extension__ __PRETTY_FUNCTION__)); | |||
25169 | ||||
25170 | const TargetFrameLowering &TFI = *Subtarget.getFrameLowering(); | |||
25171 | const Align StackAlign = TFI.getStackAlign(); | |||
25172 | if (hasInlineStackProbe(MF)) { | |||
25173 | MachineRegisterInfo &MRI = MF.getRegInfo(); | |||
25174 | ||||
25175 | const TargetRegisterClass *AddrRegClass = getRegClassFor(SPTy); | |||
25176 | Register Vreg = MRI.createVirtualRegister(AddrRegClass); | |||
25177 | Chain = DAG.getCopyToReg(Chain, dl, Vreg, Size); | |||
25178 | Result = DAG.getNode(X86ISD::PROBED_ALLOCA, dl, SPTy, Chain, | |||
25179 | DAG.getRegister(Vreg, SPTy)); | |||
25180 | } else { | |||
25181 | SDValue SP = DAG.getCopyFromReg(Chain, dl, SPReg, VT); | |||
25182 | Chain = SP.getValue(1); | |||
25183 | Result = DAG.getNode(ISD::SUB, dl, VT, SP, Size); // Value | |||
25184 | } | |||
25185 | if (Alignment && *Alignment > StackAlign) | |||
25186 | Result = | |||
25187 | DAG.getNode(ISD::AND, dl, VT, Result, | |||
25188 | DAG.getConstant(~(Alignment->value() - 1ULL), dl, VT)); | |||
25189 | Chain = DAG.getCopyToReg(Chain, dl, SPReg, Result); // Output chain | |||
25190 | } else if (SplitStack) { | |||
25191 | MachineRegisterInfo &MRI = MF.getRegInfo(); | |||
25192 | ||||
25193 | if (Is64Bit) { | |||
25194 | // The 64 bit implementation of segmented stacks needs to clobber both r10 | |||
25195 | // r11. This makes it impossible to use it along with nested parameters. | |||
25196 | const Function &F = MF.getFunction(); | |||
25197 | for (const auto &A : F.args()) { | |||
25198 | if (A.hasNestAttr()) | |||
25199 | report_fatal_error("Cannot use segmented stacks with functions that " | |||
25200 | "have nested arguments."); | |||
25201 | } | |||
25202 | } | |||
25203 | ||||
25204 | const TargetRegisterClass *AddrRegClass = getRegClassFor(SPTy); | |||
25205 | Register Vreg = MRI.createVirtualRegister(AddrRegClass); | |||
25206 | Chain = DAG.getCopyToReg(Chain, dl, Vreg, Size); | |||
25207 | Result = DAG.getNode(X86ISD::SEG_ALLOCA, dl, SPTy, Chain, | |||
25208 | DAG.getRegister(Vreg, SPTy)); | |||
25209 | } else { | |||
25210 | SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue); | |||
25211 | Chain = DAG.getNode(X86ISD::WIN_ALLOCA, dl, NodeTys, Chain, Size); | |||
25212 | MF.getInfo<X86MachineFunctionInfo>()->setHasWinAlloca(true); | |||
25213 | ||||
25214 | const X86RegisterInfo *RegInfo = Subtarget.getRegisterInfo(); | |||
25215 | Register SPReg = RegInfo->getStackRegister(); | |||
25216 | SDValue SP = DAG.getCopyFromReg(Chain, dl, SPReg, SPTy); | |||
25217 | Chain = SP.getValue(1); | |||
25218 | ||||
25219 | if (Alignment) { | |||
25220 | SP = DAG.getNode(ISD::AND, dl, VT, SP.getValue(0), | |||
25221 | DAG.getConstant(~(Alignment->value() - 1ULL), dl, VT)); | |||
25222 | Chain = DAG.getCopyToReg(Chain, dl, SPReg, SP); | |||
25223 | } | |||
25224 | ||||
25225 | Result = SP; | |||
25226 | } | |||
25227 | ||||
25228 | Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(0, dl, true), | |||
25229 | DAG.getIntPtrConstant(0, dl, true), SDValue(), dl); | |||
25230 | ||||
25231 | SDValue Ops[2] = {Result, Chain}; | |||
25232 | return DAG.getMergeValues(Ops, dl); | |||
25233 | } | |||
25234 | ||||
25235 | SDValue X86TargetLowering::LowerVASTART(SDValue Op, SelectionDAG &DAG) const { | |||
25236 | MachineFunction &MF = DAG.getMachineFunction(); | |||
25237 | auto PtrVT = getPointerTy(MF.getDataLayout()); | |||
25238 | X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>(); | |||
25239 | ||||
25240 | const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue(); | |||
25241 | SDLoc DL(Op); | |||
25242 | ||||
25243 | if (!Subtarget.is64Bit() || | |||
25244 | Subtarget.isCallingConvWin64(MF.getFunction().getCallingConv())) { | |||
25245 | // vastart just stores the address of the VarArgsFrameIndex slot into the | |||
25246 | // memory location argument. | |||
25247 | SDValue FR = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(), PtrVT); | |||
25248 | return DAG.getStore(Op.getOperand(0), DL, FR, Op.getOperand(1), | |||
25249 | MachinePointerInfo(SV)); | |||
25250 | } | |||
25251 | ||||
25252 | // __va_list_tag: | |||
25253 | // gp_offset (0 - 6 * 8) | |||
25254 | // fp_offset (48 - 48 + 8 * 16) | |||
25255 | // overflow_arg_area (point to parameters coming in memory). | |||
25256 | // reg_save_area | |||
25257 | SmallVector<SDValue, 8> MemOps; | |||
25258 | SDValue FIN = Op.getOperand(1); | |||
25259 | // Store gp_offset | |||
25260 | SDValue Store = DAG.getStore( | |||
25261 | Op.getOperand(0), DL, | |||
25262 | DAG.getConstant(FuncInfo->getVarArgsGPOffset(), DL, MVT::i32), FIN, | |||
25263 | MachinePointerInfo(SV)); | |||
25264 | MemOps.push_back(Store); | |||
25265 | ||||
25266 | // Store fp_offset | |||
25267 | FIN = DAG.getMemBasePlusOffset(FIN, TypeSize::Fixed(4), DL); | |||
25268 | Store = DAG.getStore( | |||
25269 | Op.getOperand(0), DL, | |||
25270 | DAG.getConstant(FuncInfo->getVarArgsFPOffset(), DL, MVT::i32), FIN, | |||
25271 | MachinePointerInfo(SV, 4)); | |||
25272 | MemOps.push_back(Store); | |||
25273 | ||||
25274 | // Store ptr to overflow_arg_area | |||
25275 | FIN = DAG.getNode(ISD::ADD, DL, PtrVT, FIN, DAG.getIntPtrConstant(4, DL)); | |||
25276 | SDValue OVFIN = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(), PtrVT); | |||
25277 | Store = | |||
25278 | DAG.getStore(Op.getOperand(0), DL, OVFIN, FIN, MachinePointerInfo(SV, 8)); | |||
25279 | MemOps.push_back(Store); | |||
25280 | ||||
25281 | // Store ptr to reg_save_area. | |||
25282 | FIN = DAG.getNode(ISD::ADD, DL, PtrVT, FIN, DAG.getIntPtrConstant( | |||
25283 | Subtarget.isTarget64BitLP64() ? 8 : 4, DL)); | |||
25284 | SDValue RSFIN = DAG.getFrameIndex(FuncInfo->getRegSaveFrameIndex(), PtrVT); | |||
25285 | Store = DAG.getStore( | |||
25286 | Op.getOperand(0), DL, RSFIN, FIN, | |||
25287 | MachinePointerInfo(SV, Subtarget.isTarget64BitLP64() ? 16 : 12)); | |||
25288 | MemOps.push_back(Store); | |||
25289 | return DAG.getNode(ISD::TokenFactor, DL, MVT::Other, MemOps); | |||
25290 | } | |||
25291 | ||||
25292 | SDValue X86TargetLowering::LowerVAARG(SDValue Op, SelectionDAG &DAG) const { | |||
25293 | assert(Subtarget.is64Bit() &&(static_cast <bool> (Subtarget.is64Bit() && "LowerVAARG only handles 64-bit va_arg!" ) ? void (0) : __assert_fail ("Subtarget.is64Bit() && \"LowerVAARG only handles 64-bit va_arg!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 25294, __extension__ __PRETTY_FUNCTION__)) | |||
25294 | "LowerVAARG only handles 64-bit va_arg!")(static_cast <bool> (Subtarget.is64Bit() && "LowerVAARG only handles 64-bit va_arg!" ) ? void (0) : __assert_fail ("Subtarget.is64Bit() && \"LowerVAARG only handles 64-bit va_arg!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 25294, __extension__ __PRETTY_FUNCTION__)); | |||
25295 | assert(Op.getNumOperands() == 4)(static_cast <bool> (Op.getNumOperands() == 4) ? void ( 0) : __assert_fail ("Op.getNumOperands() == 4", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 25295, __extension__ __PRETTY_FUNCTION__)); | |||
25296 | ||||
25297 | MachineFunction &MF = DAG.getMachineFunction(); | |||
25298 | if (Subtarget.isCallingConvWin64(MF.getFunction().getCallingConv())) | |||
25299 | // The Win64 ABI uses char* instead of a structure. | |||
25300 | return DAG.expandVAArg(Op.getNode()); | |||
25301 | ||||
25302 | SDValue Chain = Op.getOperand(0); | |||
25303 | SDValue SrcPtr = Op.getOperand(1); | |||
25304 | const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue(); | |||
25305 | unsigned Align = Op.getConstantOperandVal(3); | |||
25306 | SDLoc dl(Op); | |||
25307 | ||||
25308 | EVT ArgVT = Op.getNode()->getValueType(0); | |||
25309 | Type *ArgTy = ArgVT.getTypeForEVT(*DAG.getContext()); | |||
25310 | uint32_t ArgSize = DAG.getDataLayout().getTypeAllocSize(ArgTy); | |||
25311 | uint8_t ArgMode; | |||
25312 | ||||
25313 | // Decide which area this value should be read from. | |||
25314 | // TODO: Implement the AMD64 ABI in its entirety. This simple | |||
25315 | // selection mechanism works only for the basic types. | |||
25316 | assert(ArgVT != MVT::f80 && "va_arg for f80 not yet implemented")(static_cast <bool> (ArgVT != MVT::f80 && "va_arg for f80 not yet implemented" ) ? void (0) : __assert_fail ("ArgVT != MVT::f80 && \"va_arg for f80 not yet implemented\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 25316, __extension__ __PRETTY_FUNCTION__)); | |||
25317 | if (ArgVT.isFloatingPoint() && ArgSize <= 16 /*bytes*/) { | |||
25318 | ArgMode = 2; // Argument passed in XMM register. Use fp_offset. | |||
25319 | } else { | |||
25320 | assert(ArgVT.isInteger() && ArgSize <= 32 /*bytes*/ &&(static_cast <bool> (ArgVT.isInteger() && ArgSize <= 32 && "Unhandled argument type in LowerVAARG") ? void (0) : __assert_fail ("ArgVT.isInteger() && ArgSize <= 32 && \"Unhandled argument type in LowerVAARG\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 25321, __extension__ __PRETTY_FUNCTION__)) | |||
25321 | "Unhandled argument type in LowerVAARG")(static_cast <bool> (ArgVT.isInteger() && ArgSize <= 32 && "Unhandled argument type in LowerVAARG") ? void (0) : __assert_fail ("ArgVT.isInteger() && ArgSize <= 32 && \"Unhandled argument type in LowerVAARG\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 25321, __extension__ __PRETTY_FUNCTION__)); | |||
25322 | ArgMode = 1; // Argument passed in GPR64 register(s). Use gp_offset. | |||
25323 | } | |||
25324 | ||||
25325 | if (ArgMode == 2) { | |||
25326 | // Sanity Check: Make sure using fp_offset makes sense. | |||
25327 | assert(!Subtarget.useSoftFloat() &&(static_cast <bool> (!Subtarget.useSoftFloat() && !(MF.getFunction().hasFnAttribute(Attribute::NoImplicitFloat )) && Subtarget.hasSSE1()) ? void (0) : __assert_fail ("!Subtarget.useSoftFloat() && !(MF.getFunction().hasFnAttribute(Attribute::NoImplicitFloat)) && Subtarget.hasSSE1()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 25329, __extension__ __PRETTY_FUNCTION__)) | |||
25328 | !(MF.getFunction().hasFnAttribute(Attribute::NoImplicitFloat)) &&(static_cast <bool> (!Subtarget.useSoftFloat() && !(MF.getFunction().hasFnAttribute(Attribute::NoImplicitFloat )) && Subtarget.hasSSE1()) ? void (0) : __assert_fail ("!Subtarget.useSoftFloat() && !(MF.getFunction().hasFnAttribute(Attribute::NoImplicitFloat)) && Subtarget.hasSSE1()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 25329, __extension__ __PRETTY_FUNCTION__)) | |||
25329 | Subtarget.hasSSE1())(static_cast <bool> (!Subtarget.useSoftFloat() && !(MF.getFunction().hasFnAttribute(Attribute::NoImplicitFloat )) && Subtarget.hasSSE1()) ? void (0) : __assert_fail ("!Subtarget.useSoftFloat() && !(MF.getFunction().hasFnAttribute(Attribute::NoImplicitFloat)) && Subtarget.hasSSE1()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 25329, __extension__ __PRETTY_FUNCTION__)); | |||
25330 | } | |||
25331 | ||||
25332 | // Insert VAARG node into the DAG | |||
25333 | // VAARG returns two values: Variable Argument Address, Chain | |||
25334 | SDValue InstOps[] = {Chain, SrcPtr, | |||
25335 | DAG.getTargetConstant(ArgSize, dl, MVT::i32), | |||
25336 | DAG.getTargetConstant(ArgMode, dl, MVT::i8), | |||
25337 | DAG.getTargetConstant(Align, dl, MVT::i32)}; | |||
25338 | SDVTList VTs = DAG.getVTList(getPointerTy(DAG.getDataLayout()), MVT::Other); | |||
25339 | SDValue VAARG = DAG.getMemIntrinsicNode( | |||
25340 | Subtarget.isTarget64BitLP64() ? X86ISD::VAARG_64 : X86ISD::VAARG_X32, dl, | |||
25341 | VTs, InstOps, MVT::i64, MachinePointerInfo(SV), | |||
25342 | /*Alignment=*/None, | |||
25343 | MachineMemOperand::MOLoad | MachineMemOperand::MOStore); | |||
25344 | Chain = VAARG.getValue(1); | |||
25345 | ||||
25346 | // Load the next argument and return it | |||
25347 | return DAG.getLoad(ArgVT, dl, Chain, VAARG, MachinePointerInfo()); | |||
25348 | } | |||
25349 | ||||
25350 | static SDValue LowerVACOPY(SDValue Op, const X86Subtarget &Subtarget, | |||
25351 | SelectionDAG &DAG) { | |||
25352 | // X86-64 va_list is a struct { i32, i32, i8*, i8* }, except on Windows, | |||
25353 | // where a va_list is still an i8*. | |||
25354 | assert(Subtarget.is64Bit() && "This code only handles 64-bit va_copy!")(static_cast <bool> (Subtarget.is64Bit() && "This code only handles 64-bit va_copy!" ) ? void (0) : __assert_fail ("Subtarget.is64Bit() && \"This code only handles 64-bit va_copy!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 25354, __extension__ __PRETTY_FUNCTION__)); | |||
25355 | if (Subtarget.isCallingConvWin64( | |||
25356 | DAG.getMachineFunction().getFunction().getCallingConv())) | |||
25357 | // Probably a Win64 va_copy. | |||
25358 | return DAG.expandVACopy(Op.getNode()); | |||
25359 | ||||
25360 | SDValue Chain = Op.getOperand(0); | |||
25361 | SDValue DstPtr = Op.getOperand(1); | |||
25362 | SDValue SrcPtr = Op.getOperand(2); | |||
25363 | const Value *DstSV = cast<SrcValueSDNode>(Op.getOperand(3))->getValue(); | |||
25364 | const Value *SrcSV = cast<SrcValueSDNode>(Op.getOperand(4))->getValue(); | |||
25365 | SDLoc DL(Op); | |||
25366 | ||||
25367 | return DAG.getMemcpy( | |||
25368 | Chain, DL, DstPtr, SrcPtr, | |||
25369 | DAG.getIntPtrConstant(Subtarget.isTarget64BitLP64() ? 24 : 16, DL), | |||
25370 | Align(Subtarget.isTarget64BitLP64() ? 8 : 4), /*isVolatile*/ false, false, | |||
25371 | false, MachinePointerInfo(DstSV), MachinePointerInfo(SrcSV)); | |||
25372 | } | |||
25373 | ||||
25374 | // Helper to get immediate/variable SSE shift opcode from other shift opcodes. | |||
25375 | static unsigned getTargetVShiftUniformOpcode(unsigned Opc, bool IsVariable) { | |||
25376 | switch (Opc) { | |||
25377 | case ISD::SHL: | |||
25378 | case X86ISD::VSHL: | |||
25379 | case X86ISD::VSHLI: | |||
25380 | return IsVariable ? X86ISD::VSHL : X86ISD::VSHLI; | |||
25381 | case ISD::SRL: | |||
25382 | case X86ISD::VSRL: | |||
25383 | case X86ISD::VSRLI: | |||
25384 | return IsVariable ? X86ISD::VSRL : X86ISD::VSRLI; | |||
25385 | case ISD::SRA: | |||
25386 | case X86ISD::VSRA: | |||
25387 | case X86ISD::VSRAI: | |||
25388 | return IsVariable ? X86ISD::VSRA : X86ISD::VSRAI; | |||
25389 | } | |||
25390 | llvm_unreachable("Unknown target vector shift node")::llvm::llvm_unreachable_internal("Unknown target vector shift node" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 25390); | |||
25391 | } | |||
25392 | ||||
25393 | /// Handle vector element shifts where the shift amount is a constant. | |||
25394 | /// Takes immediate version of shift as input. | |||
25395 | static SDValue getTargetVShiftByConstNode(unsigned Opc, const SDLoc &dl, MVT VT, | |||
25396 | SDValue SrcOp, uint64_t ShiftAmt, | |||
25397 | SelectionDAG &DAG) { | |||
25398 | MVT ElementType = VT.getVectorElementType(); | |||
25399 | ||||
25400 | // Bitcast the source vector to the output type, this is mainly necessary for | |||
25401 | // vXi8/vXi64 shifts. | |||
25402 | if (VT != SrcOp.getSimpleValueType()) | |||
25403 | SrcOp = DAG.getBitcast(VT, SrcOp); | |||
25404 | ||||
25405 | // Fold this packed shift into its first operand if ShiftAmt is 0. | |||
25406 | if (ShiftAmt == 0) | |||
25407 | return SrcOp; | |||
25408 | ||||
25409 | // Check for ShiftAmt >= element width | |||
25410 | if (ShiftAmt >= ElementType.getSizeInBits()) { | |||
25411 | if (Opc == X86ISD::VSRAI) | |||
25412 | ShiftAmt = ElementType.getSizeInBits() - 1; | |||
25413 | else | |||
25414 | return DAG.getConstant(0, dl, VT); | |||
25415 | } | |||
25416 | ||||
25417 | assert((Opc == X86ISD::VSHLI || Opc == X86ISD::VSRLI || Opc == X86ISD::VSRAI)(static_cast <bool> ((Opc == X86ISD::VSHLI || Opc == X86ISD ::VSRLI || Opc == X86ISD::VSRAI) && "Unknown target vector shift-by-constant node" ) ? void (0) : __assert_fail ("(Opc == X86ISD::VSHLI || Opc == X86ISD::VSRLI || Opc == X86ISD::VSRAI) && \"Unknown target vector shift-by-constant node\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 25418, __extension__ __PRETTY_FUNCTION__)) | |||
25418 | && "Unknown target vector shift-by-constant node")(static_cast <bool> ((Opc == X86ISD::VSHLI || Opc == X86ISD ::VSRLI || Opc == X86ISD::VSRAI) && "Unknown target vector shift-by-constant node" ) ? void (0) : __assert_fail ("(Opc == X86ISD::VSHLI || Opc == X86ISD::VSRLI || Opc == X86ISD::VSRAI) && \"Unknown target vector shift-by-constant node\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 25418, __extension__ __PRETTY_FUNCTION__)); | |||
25419 | ||||
25420 | // Fold this packed vector shift into a build vector if SrcOp is a | |||
25421 | // vector of Constants or UNDEFs. | |||
25422 | if (ISD::isBuildVectorOfConstantSDNodes(SrcOp.getNode())) { | |||
25423 | SmallVector<SDValue, 8> Elts; | |||
25424 | unsigned NumElts = SrcOp->getNumOperands(); | |||
25425 | ||||
25426 | switch (Opc) { | |||
25427 | default: llvm_unreachable("Unknown opcode!")::llvm::llvm_unreachable_internal("Unknown opcode!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 25427); | |||
25428 | case X86ISD::VSHLI: | |||
25429 | for (unsigned i = 0; i != NumElts; ++i) { | |||
25430 | SDValue CurrentOp = SrcOp->getOperand(i); | |||
25431 | if (CurrentOp->isUndef()) { | |||
25432 | // Must produce 0s in the correct bits. | |||
25433 | Elts.push_back(DAG.getConstant(0, dl, ElementType)); | |||
25434 | continue; | |||
25435 | } | |||
25436 | auto *ND = cast<ConstantSDNode>(CurrentOp); | |||
25437 | const APInt &C = ND->getAPIntValue(); | |||
25438 | Elts.push_back(DAG.getConstant(C.shl(ShiftAmt), dl, ElementType)); | |||
25439 | } | |||
25440 | break; | |||
25441 | case X86ISD::VSRLI: | |||
25442 | for (unsigned i = 0; i != NumElts; ++i) { | |||
25443 | SDValue CurrentOp = SrcOp->getOperand(i); | |||
25444 | if (CurrentOp->isUndef()) { | |||
25445 | // Must produce 0s in the correct bits. | |||
25446 | Elts.push_back(DAG.getConstant(0, dl, ElementType)); | |||
25447 | continue; | |||
25448 | } | |||
25449 | auto *ND = cast<ConstantSDNode>(CurrentOp); | |||
25450 | const APInt &C = ND->getAPIntValue(); | |||
25451 | Elts.push_back(DAG.getConstant(C.lshr(ShiftAmt), dl, ElementType)); | |||
25452 | } | |||
25453 | break; | |||
25454 | case X86ISD::VSRAI: | |||
25455 | for (unsigned i = 0; i != NumElts; ++i) { | |||
25456 | SDValue CurrentOp = SrcOp->getOperand(i); | |||
25457 | if (CurrentOp->isUndef()) { | |||
25458 | // All shifted in bits must be the same so use 0. | |||
25459 | Elts.push_back(DAG.getConstant(0, dl, ElementType)); | |||
25460 | continue; | |||
25461 | } | |||
25462 | auto *ND = cast<ConstantSDNode>(CurrentOp); | |||
25463 | const APInt &C = ND->getAPIntValue(); | |||
25464 | Elts.push_back(DAG.getConstant(C.ashr(ShiftAmt), dl, ElementType)); | |||
25465 | } | |||
25466 | break; | |||
25467 | } | |||
25468 | ||||
25469 | return DAG.getBuildVector(VT, dl, Elts); | |||
25470 | } | |||
25471 | ||||
25472 | return DAG.getNode(Opc, dl, VT, SrcOp, | |||
25473 | DAG.getTargetConstant(ShiftAmt, dl, MVT::i8)); | |||
25474 | } | |||
25475 | ||||
25476 | /// Handle vector element shifts where the shift amount may or may not be a | |||
25477 | /// constant. Takes immediate version of shift as input. | |||
25478 | static SDValue getTargetVShiftNode(unsigned Opc, const SDLoc &dl, MVT VT, | |||
25479 | SDValue SrcOp, SDValue ShAmt, | |||
25480 | const X86Subtarget &Subtarget, | |||
25481 | SelectionDAG &DAG) { | |||
25482 | MVT SVT = ShAmt.getSimpleValueType(); | |||
25483 | assert((SVT == MVT::i32 || SVT == MVT::i64) && "Unexpected value type!")(static_cast <bool> ((SVT == MVT::i32 || SVT == MVT::i64 ) && "Unexpected value type!") ? void (0) : __assert_fail ("(SVT == MVT::i32 || SVT == MVT::i64) && \"Unexpected value type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 25483, __extension__ __PRETTY_FUNCTION__)); | |||
25484 | ||||
25485 | // Catch shift-by-constant. | |||
25486 | if (ConstantSDNode *CShAmt = dyn_cast<ConstantSDNode>(ShAmt)) | |||
25487 | return getTargetVShiftByConstNode(Opc, dl, VT, SrcOp, | |||
25488 | CShAmt->getZExtValue(), DAG); | |||
25489 | ||||
25490 | // Change opcode to non-immediate version. | |||
25491 | Opc = getTargetVShiftUniformOpcode(Opc, true); | |||
25492 | ||||
25493 | // Need to build a vector containing shift amount. | |||
25494 | // SSE/AVX packed shifts only use the lower 64-bit of the shift count. | |||
25495 | // +====================+============+=======================================+ | |||
25496 | // | ShAmt is | HasSSE4.1? | Construct ShAmt vector as | | |||
25497 | // +====================+============+=======================================+ | |||
25498 | // | i64 | Yes, No | Use ShAmt as lowest elt | | |||
25499 | // | i32 | Yes | zero-extend in-reg | | |||
25500 | // | (i32 zext(i16/i8)) | Yes | zero-extend in-reg | | |||
25501 | // | (i32 zext(i16/i8)) | No | byte-shift-in-reg | | |||
25502 | // | i16/i32 | No | v4i32 build_vector(ShAmt, 0, ud, ud)) | | |||
25503 | // +====================+============+=======================================+ | |||
25504 | ||||
25505 | if (SVT == MVT::i64) | |||
25506 | ShAmt = DAG.getNode(ISD::SCALAR_TO_VECTOR, SDLoc(ShAmt), MVT::v2i64, ShAmt); | |||
25507 | else if (ShAmt.getOpcode() == ISD::ZERO_EXTEND && | |||
25508 | ShAmt.getOperand(0).getOpcode() == ISD::EXTRACT_VECTOR_ELT && | |||
25509 | (ShAmt.getOperand(0).getSimpleValueType() == MVT::i16 || | |||
25510 | ShAmt.getOperand(0).getSimpleValueType() == MVT::i8)) { | |||
25511 | ShAmt = ShAmt.getOperand(0); | |||
25512 | MVT AmtTy = ShAmt.getSimpleValueType() == MVT::i8 ? MVT::v16i8 : MVT::v8i16; | |||
25513 | ShAmt = DAG.getNode(ISD::SCALAR_TO_VECTOR, SDLoc(ShAmt), AmtTy, ShAmt); | |||
25514 | if (Subtarget.hasSSE41()) | |||
25515 | ShAmt = DAG.getNode(ISD::ZERO_EXTEND_VECTOR_INREG, SDLoc(ShAmt), | |||
25516 | MVT::v2i64, ShAmt); | |||
25517 | else { | |||
25518 | SDValue ByteShift = DAG.getTargetConstant( | |||
25519 | (128 - AmtTy.getScalarSizeInBits()) / 8, SDLoc(ShAmt), MVT::i8); | |||
25520 | ShAmt = DAG.getBitcast(MVT::v16i8, ShAmt); | |||
25521 | ShAmt = DAG.getNode(X86ISD::VSHLDQ, SDLoc(ShAmt), MVT::v16i8, ShAmt, | |||
25522 | ByteShift); | |||
25523 | ShAmt = DAG.getNode(X86ISD::VSRLDQ, SDLoc(ShAmt), MVT::v16i8, ShAmt, | |||
25524 | ByteShift); | |||
25525 | } | |||
25526 | } else if (Subtarget.hasSSE41() && | |||
25527 | ShAmt.getOpcode() == ISD::EXTRACT_VECTOR_ELT) { | |||
25528 | ShAmt = DAG.getNode(ISD::SCALAR_TO_VECTOR, SDLoc(ShAmt), MVT::v4i32, ShAmt); | |||
25529 | ShAmt = DAG.getNode(ISD::ZERO_EXTEND_VECTOR_INREG, SDLoc(ShAmt), | |||
25530 | MVT::v2i64, ShAmt); | |||
25531 | } else { | |||
25532 | SDValue ShOps[4] = {ShAmt, DAG.getConstant(0, dl, SVT), DAG.getUNDEF(SVT), | |||
25533 | DAG.getUNDEF(SVT)}; | |||
25534 | ShAmt = DAG.getBuildVector(MVT::v4i32, dl, ShOps); | |||
25535 | } | |||
25536 | ||||
25537 | // The return type has to be a 128-bit type with the same element | |||
25538 | // type as the input type. | |||
25539 | MVT EltVT = VT.getVectorElementType(); | |||
25540 | MVT ShVT = MVT::getVectorVT(EltVT, 128 / EltVT.getSizeInBits()); | |||
25541 | ||||
25542 | ShAmt = DAG.getBitcast(ShVT, ShAmt); | |||
25543 | return DAG.getNode(Opc, dl, VT, SrcOp, ShAmt); | |||
25544 | } | |||
25545 | ||||
25546 | /// Return Mask with the necessary casting or extending | |||
25547 | /// for \p Mask according to \p MaskVT when lowering masking intrinsics | |||
25548 | static SDValue getMaskNode(SDValue Mask, MVT MaskVT, | |||
25549 | const X86Subtarget &Subtarget, SelectionDAG &DAG, | |||
25550 | const SDLoc &dl) { | |||
25551 | ||||
25552 | if (isAllOnesConstant(Mask)) | |||
25553 | return DAG.getConstant(1, dl, MaskVT); | |||
25554 | if (X86::isZeroNode(Mask)) | |||
25555 | return DAG.getConstant(0, dl, MaskVT); | |||
25556 | ||||
25557 | assert(MaskVT.bitsLE(Mask.getSimpleValueType()) && "Unexpected mask size!")(static_cast <bool> (MaskVT.bitsLE(Mask.getSimpleValueType ()) && "Unexpected mask size!") ? void (0) : __assert_fail ("MaskVT.bitsLE(Mask.getSimpleValueType()) && \"Unexpected mask size!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 25557, __extension__ __PRETTY_FUNCTION__)); | |||
25558 | ||||
25559 | if (Mask.getSimpleValueType() == MVT::i64 && Subtarget.is32Bit()) { | |||
25560 | assert(MaskVT == MVT::v64i1 && "Expected v64i1 mask!")(static_cast <bool> (MaskVT == MVT::v64i1 && "Expected v64i1 mask!" ) ? void (0) : __assert_fail ("MaskVT == MVT::v64i1 && \"Expected v64i1 mask!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 25560, __extension__ __PRETTY_FUNCTION__)); | |||
25561 | assert(Subtarget.hasBWI() && "Expected AVX512BW target!")(static_cast <bool> (Subtarget.hasBWI() && "Expected AVX512BW target!" ) ? void (0) : __assert_fail ("Subtarget.hasBWI() && \"Expected AVX512BW target!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 25561, __extension__ __PRETTY_FUNCTION__)); | |||
25562 | // In case 32bit mode, bitcast i64 is illegal, extend/split it. | |||
25563 | SDValue Lo, Hi; | |||
25564 | Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, Mask, | |||
25565 | DAG.getConstant(0, dl, MVT::i32)); | |||
25566 | Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, Mask, | |||
25567 | DAG.getConstant(1, dl, MVT::i32)); | |||
25568 | ||||
25569 | Lo = DAG.getBitcast(MVT::v32i1, Lo); | |||
25570 | Hi = DAG.getBitcast(MVT::v32i1, Hi); | |||
25571 | ||||
25572 | return DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v64i1, Lo, Hi); | |||
25573 | } else { | |||
25574 | MVT BitcastVT = MVT::getVectorVT(MVT::i1, | |||
25575 | Mask.getSimpleValueType().getSizeInBits()); | |||
25576 | // In case when MaskVT equals v2i1 or v4i1, low 2 or 4 elements | |||
25577 | // are extracted by EXTRACT_SUBVECTOR. | |||
25578 | return DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MaskVT, | |||
25579 | DAG.getBitcast(BitcastVT, Mask), | |||
25580 | DAG.getIntPtrConstant(0, dl)); | |||
25581 | } | |||
25582 | } | |||
25583 | ||||
25584 | /// Return (and \p Op, \p Mask) for compare instructions or | |||
25585 | /// (vselect \p Mask, \p Op, \p PreservedSrc) for others along with the | |||
25586 | /// necessary casting or extending for \p Mask when lowering masking intrinsics | |||
25587 | static SDValue getVectorMaskingNode(SDValue Op, SDValue Mask, | |||
25588 | SDValue PreservedSrc, | |||
25589 | const X86Subtarget &Subtarget, | |||
25590 | SelectionDAG &DAG) { | |||
25591 | MVT VT = Op.getSimpleValueType(); | |||
25592 | MVT MaskVT = MVT::getVectorVT(MVT::i1, VT.getVectorNumElements()); | |||
25593 | unsigned OpcodeSelect = ISD::VSELECT; | |||
25594 | SDLoc dl(Op); | |||
25595 | ||||
25596 | if (isAllOnesConstant(Mask)) | |||
25597 | return Op; | |||
25598 | ||||
25599 | SDValue VMask = getMaskNode(Mask, MaskVT, Subtarget, DAG, dl); | |||
25600 | ||||
25601 | if (PreservedSrc.isUndef()) | |||
25602 | PreservedSrc = getZeroVector(VT, Subtarget, DAG, dl); | |||
25603 | return DAG.getNode(OpcodeSelect, dl, VT, VMask, Op, PreservedSrc); | |||
25604 | } | |||
25605 | ||||
25606 | /// Creates an SDNode for a predicated scalar operation. | |||
25607 | /// \returns (X86vselect \p Mask, \p Op, \p PreservedSrc). | |||
25608 | /// The mask is coming as MVT::i8 and it should be transformed | |||
25609 | /// to MVT::v1i1 while lowering masking intrinsics. | |||
25610 | /// The main difference between ScalarMaskingNode and VectorMaskingNode is using | |||
25611 | /// "X86select" instead of "vselect". We just can't create the "vselect" node | |||
25612 | /// for a scalar instruction. | |||
25613 | static SDValue getScalarMaskingNode(SDValue Op, SDValue Mask, | |||
25614 | SDValue PreservedSrc, | |||
25615 | const X86Subtarget &Subtarget, | |||
25616 | SelectionDAG &DAG) { | |||
25617 | ||||
25618 | if (auto *MaskConst = dyn_cast<ConstantSDNode>(Mask)) | |||
25619 | if (MaskConst->getZExtValue() & 0x1) | |||
25620 | return Op; | |||
25621 | ||||
25622 | MVT VT = Op.getSimpleValueType(); | |||
25623 | SDLoc dl(Op); | |||
25624 | ||||
25625 | assert(Mask.getValueType() == MVT::i8 && "Unexpect type")(static_cast <bool> (Mask.getValueType() == MVT::i8 && "Unexpect type") ? void (0) : __assert_fail ("Mask.getValueType() == MVT::i8 && \"Unexpect type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 25625, __extension__ __PRETTY_FUNCTION__)); | |||
25626 | SDValue IMask = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v1i1, | |||
25627 | DAG.getBitcast(MVT::v8i1, Mask), | |||
25628 | DAG.getIntPtrConstant(0, dl)); | |||
25629 | if (Op.getOpcode() == X86ISD::FSETCCM || | |||
25630 | Op.getOpcode() == X86ISD::FSETCCM_SAE || | |||
25631 | Op.getOpcode() == X86ISD::VFPCLASSS) | |||
25632 | return DAG.getNode(ISD::AND, dl, VT, Op, IMask); | |||
25633 | ||||
25634 | if (PreservedSrc.isUndef()) | |||
25635 | PreservedSrc = getZeroVector(VT, Subtarget, DAG, dl); | |||
25636 | return DAG.getNode(X86ISD::SELECTS, dl, VT, IMask, Op, PreservedSrc); | |||
25637 | } | |||
25638 | ||||
25639 | static int getSEHRegistrationNodeSize(const Function *Fn) { | |||
25640 | if (!Fn->hasPersonalityFn()) | |||
25641 | report_fatal_error( | |||
25642 | "querying registration node size for function without personality"); | |||
25643 | // The RegNodeSize is 6 32-bit words for SEH and 4 for C++ EH. See | |||
25644 | // WinEHStatePass for the full struct definition. | |||
25645 | switch (classifyEHPersonality(Fn->getPersonalityFn())) { | |||
25646 | case EHPersonality::MSVC_X86SEH: return 24; | |||
25647 | case EHPersonality::MSVC_CXX: return 16; | |||
25648 | default: break; | |||
25649 | } | |||
25650 | report_fatal_error( | |||
25651 | "can only recover FP for 32-bit MSVC EH personality functions"); | |||
25652 | } | |||
25653 | ||||
25654 | /// When the MSVC runtime transfers control to us, either to an outlined | |||
25655 | /// function or when returning to a parent frame after catching an exception, we | |||
25656 | /// recover the parent frame pointer by doing arithmetic on the incoming EBP. | |||
25657 | /// Here's the math: | |||
25658 | /// RegNodeBase = EntryEBP - RegNodeSize | |||
25659 | /// ParentFP = RegNodeBase - ParentFrameOffset | |||
25660 | /// Subtracting RegNodeSize takes us to the offset of the registration node, and | |||
25661 | /// subtracting the offset (negative on x86) takes us back to the parent FP. | |||
25662 | static SDValue recoverFramePointer(SelectionDAG &DAG, const Function *Fn, | |||
25663 | SDValue EntryEBP) { | |||
25664 | MachineFunction &MF = DAG.getMachineFunction(); | |||
25665 | SDLoc dl; | |||
25666 | ||||
25667 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
25668 | MVT PtrVT = TLI.getPointerTy(DAG.getDataLayout()); | |||
25669 | ||||
25670 | // It's possible that the parent function no longer has a personality function | |||
25671 | // if the exceptional code was optimized away, in which case we just return | |||
25672 | // the incoming EBP. | |||
25673 | if (!Fn->hasPersonalityFn()) | |||
25674 | return EntryEBP; | |||
25675 | ||||
25676 | // Get an MCSymbol that will ultimately resolve to the frame offset of the EH | |||
25677 | // registration, or the .set_setframe offset. | |||
25678 | MCSymbol *OffsetSym = | |||
25679 | MF.getMMI().getContext().getOrCreateParentFrameOffsetSymbol( | |||
25680 | GlobalValue::dropLLVMManglingEscape(Fn->getName())); | |||
25681 | SDValue OffsetSymVal = DAG.getMCSymbol(OffsetSym, PtrVT); | |||
25682 | SDValue ParentFrameOffset = | |||
25683 | DAG.getNode(ISD::LOCAL_RECOVER, dl, PtrVT, OffsetSymVal); | |||
25684 | ||||
25685 | // Return EntryEBP + ParentFrameOffset for x64. This adjusts from RSP after | |||
25686 | // prologue to RBP in the parent function. | |||
25687 | const X86Subtarget &Subtarget = | |||
25688 | static_cast<const X86Subtarget &>(DAG.getSubtarget()); | |||
25689 | if (Subtarget.is64Bit()) | |||
25690 | return DAG.getNode(ISD::ADD, dl, PtrVT, EntryEBP, ParentFrameOffset); | |||
25691 | ||||
25692 | int RegNodeSize = getSEHRegistrationNodeSize(Fn); | |||
25693 | // RegNodeBase = EntryEBP - RegNodeSize | |||
25694 | // ParentFP = RegNodeBase - ParentFrameOffset | |||
25695 | SDValue RegNodeBase = DAG.getNode(ISD::SUB, dl, PtrVT, EntryEBP, | |||
25696 | DAG.getConstant(RegNodeSize, dl, PtrVT)); | |||
25697 | return DAG.getNode(ISD::SUB, dl, PtrVT, RegNodeBase, ParentFrameOffset); | |||
25698 | } | |||
25699 | ||||
25700 | SDValue X86TargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op, | |||
25701 | SelectionDAG &DAG) const { | |||
25702 | // Helper to detect if the operand is CUR_DIRECTION rounding mode. | |||
25703 | auto isRoundModeCurDirection = [](SDValue Rnd) { | |||
25704 | if (auto *C = dyn_cast<ConstantSDNode>(Rnd)) | |||
25705 | return C->getAPIntValue() == X86::STATIC_ROUNDING::CUR_DIRECTION; | |||
25706 | ||||
25707 | return false; | |||
25708 | }; | |||
25709 | auto isRoundModeSAE = [](SDValue Rnd) { | |||
25710 | if (auto *C = dyn_cast<ConstantSDNode>(Rnd)) { | |||
25711 | unsigned RC = C->getZExtValue(); | |||
25712 | if (RC & X86::STATIC_ROUNDING::NO_EXC) { | |||
25713 | // Clear the NO_EXC bit and check remaining bits. | |||
25714 | RC ^= X86::STATIC_ROUNDING::NO_EXC; | |||
25715 | // As a convenience we allow no other bits or explicitly | |||
25716 | // current direction. | |||
25717 | return RC == 0 || RC == X86::STATIC_ROUNDING::CUR_DIRECTION; | |||
25718 | } | |||
25719 | } | |||
25720 | ||||
25721 | return false; | |||
25722 | }; | |||
25723 | auto isRoundModeSAEToX = [](SDValue Rnd, unsigned &RC) { | |||
25724 | if (auto *C = dyn_cast<ConstantSDNode>(Rnd)) { | |||
25725 | RC = C->getZExtValue(); | |||
25726 | if (RC & X86::STATIC_ROUNDING::NO_EXC) { | |||
25727 | // Clear the NO_EXC bit and check remaining bits. | |||
25728 | RC ^= X86::STATIC_ROUNDING::NO_EXC; | |||
25729 | return RC == X86::STATIC_ROUNDING::TO_NEAREST_INT || | |||
25730 | RC == X86::STATIC_ROUNDING::TO_NEG_INF || | |||
25731 | RC == X86::STATIC_ROUNDING::TO_POS_INF || | |||
25732 | RC == X86::STATIC_ROUNDING::TO_ZERO; | |||
25733 | } | |||
25734 | } | |||
25735 | ||||
25736 | return false; | |||
25737 | }; | |||
25738 | ||||
25739 | SDLoc dl(Op); | |||
25740 | unsigned IntNo = Op.getConstantOperandVal(0); | |||
25741 | MVT VT = Op.getSimpleValueType(); | |||
25742 | const IntrinsicData* IntrData = getIntrinsicWithoutChain(IntNo); | |||
25743 | ||||
25744 | // Propagate flags from original node to transformed node(s). | |||
25745 | SelectionDAG::FlagInserter FlagsInserter(DAG, Op->getFlags()); | |||
25746 | ||||
25747 | if (IntrData) { | |||
25748 | switch(IntrData->Type) { | |||
25749 | case INTR_TYPE_1OP: { | |||
25750 | // We specify 2 possible opcodes for intrinsics with rounding modes. | |||
25751 | // First, we check if the intrinsic may have non-default rounding mode, | |||
25752 | // (IntrData->Opc1 != 0), then we check the rounding mode operand. | |||
25753 | unsigned IntrWithRoundingModeOpcode = IntrData->Opc1; | |||
25754 | if (IntrWithRoundingModeOpcode != 0) { | |||
25755 | SDValue Rnd = Op.getOperand(2); | |||
25756 | unsigned RC = 0; | |||
25757 | if (isRoundModeSAEToX(Rnd, RC)) | |||
25758 | return DAG.getNode(IntrWithRoundingModeOpcode, dl, Op.getValueType(), | |||
25759 | Op.getOperand(1), | |||
25760 | DAG.getTargetConstant(RC, dl, MVT::i32)); | |||
25761 | if (!isRoundModeCurDirection(Rnd)) | |||
25762 | return SDValue(); | |||
25763 | } | |||
25764 | return DAG.getNode(IntrData->Opc0, dl, Op.getValueType(), | |||
25765 | Op.getOperand(1)); | |||
25766 | } | |||
25767 | case INTR_TYPE_1OP_SAE: { | |||
25768 | SDValue Sae = Op.getOperand(2); | |||
25769 | ||||
25770 | unsigned Opc; | |||
25771 | if (isRoundModeCurDirection(Sae)) | |||
25772 | Opc = IntrData->Opc0; | |||
25773 | else if (isRoundModeSAE(Sae)) | |||
25774 | Opc = IntrData->Opc1; | |||
25775 | else | |||
25776 | return SDValue(); | |||
25777 | ||||
25778 | return DAG.getNode(Opc, dl, Op.getValueType(), Op.getOperand(1)); | |||
25779 | } | |||
25780 | case INTR_TYPE_2OP: { | |||
25781 | SDValue Src2 = Op.getOperand(2); | |||
25782 | ||||
25783 | // We specify 2 possible opcodes for intrinsics with rounding modes. | |||
25784 | // First, we check if the intrinsic may have non-default rounding mode, | |||
25785 | // (IntrData->Opc1 != 0), then we check the rounding mode operand. | |||
25786 | unsigned IntrWithRoundingModeOpcode = IntrData->Opc1; | |||
25787 | if (IntrWithRoundingModeOpcode != 0) { | |||
25788 | SDValue Rnd = Op.getOperand(3); | |||
25789 | unsigned RC = 0; | |||
25790 | if (isRoundModeSAEToX(Rnd, RC)) | |||
25791 | return DAG.getNode(IntrWithRoundingModeOpcode, dl, Op.getValueType(), | |||
25792 | Op.getOperand(1), Src2, | |||
25793 | DAG.getTargetConstant(RC, dl, MVT::i32)); | |||
25794 | if (!isRoundModeCurDirection(Rnd)) | |||
25795 | return SDValue(); | |||
25796 | } | |||
25797 | ||||
25798 | return DAG.getNode(IntrData->Opc0, dl, Op.getValueType(), | |||
25799 | Op.getOperand(1), Src2); | |||
25800 | } | |||
25801 | case INTR_TYPE_2OP_SAE: { | |||
25802 | SDValue Sae = Op.getOperand(3); | |||
25803 | ||||
25804 | unsigned Opc; | |||
25805 | if (isRoundModeCurDirection(Sae)) | |||
25806 | Opc = IntrData->Opc0; | |||
25807 | else if (isRoundModeSAE(Sae)) | |||
25808 | Opc = IntrData->Opc1; | |||
25809 | else | |||
25810 | return SDValue(); | |||
25811 | ||||
25812 | return DAG.getNode(Opc, dl, Op.getValueType(), Op.getOperand(1), | |||
25813 | Op.getOperand(2)); | |||
25814 | } | |||
25815 | case INTR_TYPE_3OP: | |||
25816 | case INTR_TYPE_3OP_IMM8: { | |||
25817 | SDValue Src1 = Op.getOperand(1); | |||
25818 | SDValue Src2 = Op.getOperand(2); | |||
25819 | SDValue Src3 = Op.getOperand(3); | |||
25820 | ||||
25821 | if (IntrData->Type == INTR_TYPE_3OP_IMM8 && | |||
25822 | Src3.getValueType() != MVT::i8) { | |||
25823 | Src3 = DAG.getTargetConstant( | |||
25824 | cast<ConstantSDNode>(Src3)->getZExtValue() & 0xff, dl, MVT::i8); | |||
25825 | } | |||
25826 | ||||
25827 | // We specify 2 possible opcodes for intrinsics with rounding modes. | |||
25828 | // First, we check if the intrinsic may have non-default rounding mode, | |||
25829 | // (IntrData->Opc1 != 0), then we check the rounding mode operand. | |||
25830 | unsigned IntrWithRoundingModeOpcode = IntrData->Opc1; | |||
25831 | if (IntrWithRoundingModeOpcode != 0) { | |||
25832 | SDValue Rnd = Op.getOperand(4); | |||
25833 | unsigned RC = 0; | |||
25834 | if (isRoundModeSAEToX(Rnd, RC)) | |||
25835 | return DAG.getNode(IntrWithRoundingModeOpcode, dl, Op.getValueType(), | |||
25836 | Src1, Src2, Src3, | |||
25837 | DAG.getTargetConstant(RC, dl, MVT::i32)); | |||
25838 | if (!isRoundModeCurDirection(Rnd)) | |||
25839 | return SDValue(); | |||
25840 | } | |||
25841 | ||||
25842 | return DAG.getNode(IntrData->Opc0, dl, Op.getValueType(), | |||
25843 | {Src1, Src2, Src3}); | |||
25844 | } | |||
25845 | case INTR_TYPE_4OP_IMM8: { | |||
25846 | assert(Op.getOperand(4)->getOpcode() == ISD::TargetConstant)(static_cast <bool> (Op.getOperand(4)->getOpcode() == ISD::TargetConstant) ? void (0) : __assert_fail ("Op.getOperand(4)->getOpcode() == ISD::TargetConstant" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 25846, __extension__ __PRETTY_FUNCTION__)); | |||
25847 | SDValue Src4 = Op.getOperand(4); | |||
25848 | if (Src4.getValueType() != MVT::i8) { | |||
25849 | Src4 = DAG.getTargetConstant( | |||
25850 | cast<ConstantSDNode>(Src4)->getZExtValue() & 0xff, dl, MVT::i8); | |||
25851 | } | |||
25852 | ||||
25853 | return DAG.getNode(IntrData->Opc0, dl, Op.getValueType(), | |||
25854 | Op.getOperand(1), Op.getOperand(2), Op.getOperand(3), | |||
25855 | Src4); | |||
25856 | } | |||
25857 | case INTR_TYPE_1OP_MASK: { | |||
25858 | SDValue Src = Op.getOperand(1); | |||
25859 | SDValue PassThru = Op.getOperand(2); | |||
25860 | SDValue Mask = Op.getOperand(3); | |||
25861 | // We add rounding mode to the Node when | |||
25862 | // - RC Opcode is specified and | |||
25863 | // - RC is not "current direction". | |||
25864 | unsigned IntrWithRoundingModeOpcode = IntrData->Opc1; | |||
25865 | if (IntrWithRoundingModeOpcode != 0) { | |||
25866 | SDValue Rnd = Op.getOperand(4); | |||
25867 | unsigned RC = 0; | |||
25868 | if (isRoundModeSAEToX(Rnd, RC)) | |||
25869 | return getVectorMaskingNode( | |||
25870 | DAG.getNode(IntrWithRoundingModeOpcode, dl, Op.getValueType(), | |||
25871 | Src, DAG.getTargetConstant(RC, dl, MVT::i32)), | |||
25872 | Mask, PassThru, Subtarget, DAG); | |||
25873 | if (!isRoundModeCurDirection(Rnd)) | |||
25874 | return SDValue(); | |||
25875 | } | |||
25876 | return getVectorMaskingNode( | |||
25877 | DAG.getNode(IntrData->Opc0, dl, VT, Src), Mask, PassThru, | |||
25878 | Subtarget, DAG); | |||
25879 | } | |||
25880 | case INTR_TYPE_1OP_MASK_SAE: { | |||
25881 | SDValue Src = Op.getOperand(1); | |||
25882 | SDValue PassThru = Op.getOperand(2); | |||
25883 | SDValue Mask = Op.getOperand(3); | |||
25884 | SDValue Rnd = Op.getOperand(4); | |||
25885 | ||||
25886 | unsigned Opc; | |||
25887 | if (isRoundModeCurDirection(Rnd)) | |||
25888 | Opc = IntrData->Opc0; | |||
25889 | else if (isRoundModeSAE(Rnd)) | |||
25890 | Opc = IntrData->Opc1; | |||
25891 | else | |||
25892 | return SDValue(); | |||
25893 | ||||
25894 | return getVectorMaskingNode(DAG.getNode(Opc, dl, VT, Src), Mask, PassThru, | |||
25895 | Subtarget, DAG); | |||
25896 | } | |||
25897 | case INTR_TYPE_SCALAR_MASK: { | |||
25898 | SDValue Src1 = Op.getOperand(1); | |||
25899 | SDValue Src2 = Op.getOperand(2); | |||
25900 | SDValue passThru = Op.getOperand(3); | |||
25901 | SDValue Mask = Op.getOperand(4); | |||
25902 | unsigned IntrWithRoundingModeOpcode = IntrData->Opc1; | |||
25903 | // There are 2 kinds of intrinsics in this group: | |||
25904 | // (1) With suppress-all-exceptions (sae) or rounding mode- 6 operands | |||
25905 | // (2) With rounding mode and sae - 7 operands. | |||
25906 | bool HasRounding = IntrWithRoundingModeOpcode != 0; | |||
25907 | if (Op.getNumOperands() == (5U + HasRounding)) { | |||
25908 | if (HasRounding) { | |||
25909 | SDValue Rnd = Op.getOperand(5); | |||
25910 | unsigned RC = 0; | |||
25911 | if (isRoundModeSAEToX(Rnd, RC)) | |||
25912 | return getScalarMaskingNode( | |||
25913 | DAG.getNode(IntrWithRoundingModeOpcode, dl, VT, Src1, Src2, | |||
25914 | DAG.getTargetConstant(RC, dl, MVT::i32)), | |||
25915 | Mask, passThru, Subtarget, DAG); | |||
25916 | if (!isRoundModeCurDirection(Rnd)) | |||
25917 | return SDValue(); | |||
25918 | } | |||
25919 | return getScalarMaskingNode(DAG.getNode(IntrData->Opc0, dl, VT, Src1, | |||
25920 | Src2), | |||
25921 | Mask, passThru, Subtarget, DAG); | |||
25922 | } | |||
25923 | ||||
25924 | assert(Op.getNumOperands() == (6U + HasRounding) &&(static_cast <bool> (Op.getNumOperands() == (6U + HasRounding ) && "Unexpected intrinsic form") ? void (0) : __assert_fail ("Op.getNumOperands() == (6U + HasRounding) && \"Unexpected intrinsic form\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 25925, __extension__ __PRETTY_FUNCTION__)) | |||
25925 | "Unexpected intrinsic form")(static_cast <bool> (Op.getNumOperands() == (6U + HasRounding ) && "Unexpected intrinsic form") ? void (0) : __assert_fail ("Op.getNumOperands() == (6U + HasRounding) && \"Unexpected intrinsic form\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 25925, __extension__ __PRETTY_FUNCTION__)); | |||
25926 | SDValue RoundingMode = Op.getOperand(5); | |||
25927 | unsigned Opc = IntrData->Opc0; | |||
25928 | if (HasRounding) { | |||
25929 | SDValue Sae = Op.getOperand(6); | |||
25930 | if (isRoundModeSAE(Sae)) | |||
25931 | Opc = IntrWithRoundingModeOpcode; | |||
25932 | else if (!isRoundModeCurDirection(Sae)) | |||
25933 | return SDValue(); | |||
25934 | } | |||
25935 | return getScalarMaskingNode(DAG.getNode(Opc, dl, VT, Src1, | |||
25936 | Src2, RoundingMode), | |||
25937 | Mask, passThru, Subtarget, DAG); | |||
25938 | } | |||
25939 | case INTR_TYPE_SCALAR_MASK_RND: { | |||
25940 | SDValue Src1 = Op.getOperand(1); | |||
25941 | SDValue Src2 = Op.getOperand(2); | |||
25942 | SDValue passThru = Op.getOperand(3); | |||
25943 | SDValue Mask = Op.getOperand(4); | |||
25944 | SDValue Rnd = Op.getOperand(5); | |||
25945 | ||||
25946 | SDValue NewOp; | |||
25947 | unsigned RC = 0; | |||
25948 | if (isRoundModeCurDirection(Rnd)) | |||
25949 | NewOp = DAG.getNode(IntrData->Opc0, dl, VT, Src1, Src2); | |||
25950 | else if (isRoundModeSAEToX(Rnd, RC)) | |||
25951 | NewOp = DAG.getNode(IntrData->Opc1, dl, VT, Src1, Src2, | |||
25952 | DAG.getTargetConstant(RC, dl, MVT::i32)); | |||
25953 | else | |||
25954 | return SDValue(); | |||
25955 | ||||
25956 | return getScalarMaskingNode(NewOp, Mask, passThru, Subtarget, DAG); | |||
25957 | } | |||
25958 | case INTR_TYPE_SCALAR_MASK_SAE: { | |||
25959 | SDValue Src1 = Op.getOperand(1); | |||
25960 | SDValue Src2 = Op.getOperand(2); | |||
25961 | SDValue passThru = Op.getOperand(3); | |||
25962 | SDValue Mask = Op.getOperand(4); | |||
25963 | SDValue Sae = Op.getOperand(5); | |||
25964 | unsigned Opc; | |||
25965 | if (isRoundModeCurDirection(Sae)) | |||
25966 | Opc = IntrData->Opc0; | |||
25967 | else if (isRoundModeSAE(Sae)) | |||
25968 | Opc = IntrData->Opc1; | |||
25969 | else | |||
25970 | return SDValue(); | |||
25971 | ||||
25972 | return getScalarMaskingNode(DAG.getNode(Opc, dl, VT, Src1, Src2), | |||
25973 | Mask, passThru, Subtarget, DAG); | |||
25974 | } | |||
25975 | case INTR_TYPE_2OP_MASK: { | |||
25976 | SDValue Src1 = Op.getOperand(1); | |||
25977 | SDValue Src2 = Op.getOperand(2); | |||
25978 | SDValue PassThru = Op.getOperand(3); | |||
25979 | SDValue Mask = Op.getOperand(4); | |||
25980 | SDValue NewOp; | |||
25981 | if (IntrData->Opc1 != 0) { | |||
25982 | SDValue Rnd = Op.getOperand(5); | |||
25983 | unsigned RC = 0; | |||
25984 | if (isRoundModeSAEToX(Rnd, RC)) | |||
25985 | NewOp = DAG.getNode(IntrData->Opc1, dl, VT, Src1, Src2, | |||
25986 | DAG.getTargetConstant(RC, dl, MVT::i32)); | |||
25987 | else if (!isRoundModeCurDirection(Rnd)) | |||
25988 | return SDValue(); | |||
25989 | } | |||
25990 | if (!NewOp) | |||
25991 | NewOp = DAG.getNode(IntrData->Opc0, dl, VT, Src1, Src2); | |||
25992 | return getVectorMaskingNode(NewOp, Mask, PassThru, Subtarget, DAG); | |||
25993 | } | |||
25994 | case INTR_TYPE_2OP_MASK_SAE: { | |||
25995 | SDValue Src1 = Op.getOperand(1); | |||
25996 | SDValue Src2 = Op.getOperand(2); | |||
25997 | SDValue PassThru = Op.getOperand(3); | |||
25998 | SDValue Mask = Op.getOperand(4); | |||
25999 | ||||
26000 | unsigned Opc = IntrData->Opc0; | |||
26001 | if (IntrData->Opc1 != 0) { | |||
26002 | SDValue Sae = Op.getOperand(5); | |||
26003 | if (isRoundModeSAE(Sae)) | |||
26004 | Opc = IntrData->Opc1; | |||
26005 | else if (!isRoundModeCurDirection(Sae)) | |||
26006 | return SDValue(); | |||
26007 | } | |||
26008 | ||||
26009 | return getVectorMaskingNode(DAG.getNode(Opc, dl, VT, Src1, Src2), | |||
26010 | Mask, PassThru, Subtarget, DAG); | |||
26011 | } | |||
26012 | case INTR_TYPE_3OP_SCALAR_MASK_SAE: { | |||
26013 | SDValue Src1 = Op.getOperand(1); | |||
26014 | SDValue Src2 = Op.getOperand(2); | |||
26015 | SDValue Src3 = Op.getOperand(3); | |||
26016 | SDValue PassThru = Op.getOperand(4); | |||
26017 | SDValue Mask = Op.getOperand(5); | |||
26018 | SDValue Sae = Op.getOperand(6); | |||
26019 | unsigned Opc; | |||
26020 | if (isRoundModeCurDirection(Sae)) | |||
26021 | Opc = IntrData->Opc0; | |||
26022 | else if (isRoundModeSAE(Sae)) | |||
26023 | Opc = IntrData->Opc1; | |||
26024 | else | |||
26025 | return SDValue(); | |||
26026 | ||||
26027 | return getScalarMaskingNode(DAG.getNode(Opc, dl, VT, Src1, Src2, Src3), | |||
26028 | Mask, PassThru, Subtarget, DAG); | |||
26029 | } | |||
26030 | case INTR_TYPE_3OP_MASK_SAE: { | |||
26031 | SDValue Src1 = Op.getOperand(1); | |||
26032 | SDValue Src2 = Op.getOperand(2); | |||
26033 | SDValue Src3 = Op.getOperand(3); | |||
26034 | SDValue PassThru = Op.getOperand(4); | |||
26035 | SDValue Mask = Op.getOperand(5); | |||
26036 | ||||
26037 | unsigned Opc = IntrData->Opc0; | |||
26038 | if (IntrData->Opc1 != 0) { | |||
26039 | SDValue Sae = Op.getOperand(6); | |||
26040 | if (isRoundModeSAE(Sae)) | |||
26041 | Opc = IntrData->Opc1; | |||
26042 | else if (!isRoundModeCurDirection(Sae)) | |||
26043 | return SDValue(); | |||
26044 | } | |||
26045 | return getVectorMaskingNode(DAG.getNode(Opc, dl, VT, Src1, Src2, Src3), | |||
26046 | Mask, PassThru, Subtarget, DAG); | |||
26047 | } | |||
26048 | case BLENDV: { | |||
26049 | SDValue Src1 = Op.getOperand(1); | |||
26050 | SDValue Src2 = Op.getOperand(2); | |||
26051 | SDValue Src3 = Op.getOperand(3); | |||
26052 | ||||
26053 | EVT MaskVT = Src3.getValueType().changeVectorElementTypeToInteger(); | |||
26054 | Src3 = DAG.getBitcast(MaskVT, Src3); | |||
26055 | ||||
26056 | // Reverse the operands to match VSELECT order. | |||
26057 | return DAG.getNode(IntrData->Opc0, dl, VT, Src3, Src2, Src1); | |||
26058 | } | |||
26059 | case VPERM_2OP : { | |||
26060 | SDValue Src1 = Op.getOperand(1); | |||
26061 | SDValue Src2 = Op.getOperand(2); | |||
26062 | ||||
26063 | // Swap Src1 and Src2 in the node creation | |||
26064 | return DAG.getNode(IntrData->Opc0, dl, VT,Src2, Src1); | |||
26065 | } | |||
26066 | case IFMA_OP: | |||
26067 | // NOTE: We need to swizzle the operands to pass the multiply operands | |||
26068 | // first. | |||
26069 | return DAG.getNode(IntrData->Opc0, dl, Op.getValueType(), | |||
26070 | Op.getOperand(2), Op.getOperand(3), Op.getOperand(1)); | |||
26071 | case FPCLASSS: { | |||
26072 | SDValue Src1 = Op.getOperand(1); | |||
26073 | SDValue Imm = Op.getOperand(2); | |||
26074 | SDValue Mask = Op.getOperand(3); | |||
26075 | SDValue FPclass = DAG.getNode(IntrData->Opc0, dl, MVT::v1i1, Src1, Imm); | |||
26076 | SDValue FPclassMask = getScalarMaskingNode(FPclass, Mask, SDValue(), | |||
26077 | Subtarget, DAG); | |||
26078 | // Need to fill with zeros to ensure the bitcast will produce zeroes | |||
26079 | // for the upper bits. An EXTRACT_ELEMENT here wouldn't guarantee that. | |||
26080 | SDValue Ins = DAG.getNode(ISD::INSERT_SUBVECTOR, dl, MVT::v8i1, | |||
26081 | DAG.getConstant(0, dl, MVT::v8i1), | |||
26082 | FPclassMask, DAG.getIntPtrConstant(0, dl)); | |||
26083 | return DAG.getBitcast(MVT::i8, Ins); | |||
26084 | } | |||
26085 | ||||
26086 | case CMP_MASK_CC: { | |||
26087 | MVT MaskVT = Op.getSimpleValueType(); | |||
26088 | SDValue CC = Op.getOperand(3); | |||
26089 | SDValue Mask = Op.getOperand(4); | |||
26090 | // We specify 2 possible opcodes for intrinsics with rounding modes. | |||
26091 | // First, we check if the intrinsic may have non-default rounding mode, | |||
26092 | // (IntrData->Opc1 != 0), then we check the rounding mode operand. | |||
26093 | if (IntrData->Opc1 != 0) { | |||
26094 | SDValue Sae = Op.getOperand(5); | |||
26095 | if (isRoundModeSAE(Sae)) | |||
26096 | return DAG.getNode(IntrData->Opc1, dl, MaskVT, Op.getOperand(1), | |||
26097 | Op.getOperand(2), CC, Mask, Sae); | |||
26098 | if (!isRoundModeCurDirection(Sae)) | |||
26099 | return SDValue(); | |||
26100 | } | |||
26101 | //default rounding mode | |||
26102 | return DAG.getNode(IntrData->Opc0, dl, MaskVT, | |||
26103 | {Op.getOperand(1), Op.getOperand(2), CC, Mask}); | |||
26104 | } | |||
26105 | case CMP_MASK_SCALAR_CC: { | |||
26106 | SDValue Src1 = Op.getOperand(1); | |||
26107 | SDValue Src2 = Op.getOperand(2); | |||
26108 | SDValue CC = Op.getOperand(3); | |||
26109 | SDValue Mask = Op.getOperand(4); | |||
26110 | ||||
26111 | SDValue Cmp; | |||
26112 | if (IntrData->Opc1 != 0) { | |||
26113 | SDValue Sae = Op.getOperand(5); | |||
26114 | if (isRoundModeSAE(Sae)) | |||
26115 | Cmp = DAG.getNode(IntrData->Opc1, dl, MVT::v1i1, Src1, Src2, CC, Sae); | |||
26116 | else if (!isRoundModeCurDirection(Sae)) | |||
26117 | return SDValue(); | |||
26118 | } | |||
26119 | //default rounding mode | |||
26120 | if (!Cmp.getNode()) | |||
26121 | Cmp = DAG.getNode(IntrData->Opc0, dl, MVT::v1i1, Src1, Src2, CC); | |||
26122 | ||||
26123 | SDValue CmpMask = getScalarMaskingNode(Cmp, Mask, SDValue(), | |||
26124 | Subtarget, DAG); | |||
26125 | // Need to fill with zeros to ensure the bitcast will produce zeroes | |||
26126 | // for the upper bits. An EXTRACT_ELEMENT here wouldn't guarantee that. | |||
26127 | SDValue Ins = DAG.getNode(ISD::INSERT_SUBVECTOR, dl, MVT::v8i1, | |||
26128 | DAG.getConstant(0, dl, MVT::v8i1), | |||
26129 | CmpMask, DAG.getIntPtrConstant(0, dl)); | |||
26130 | return DAG.getBitcast(MVT::i8, Ins); | |||
26131 | } | |||
26132 | case COMI: { // Comparison intrinsics | |||
26133 | ISD::CondCode CC = (ISD::CondCode)IntrData->Opc1; | |||
26134 | SDValue LHS = Op.getOperand(1); | |||
26135 | SDValue RHS = Op.getOperand(2); | |||
26136 | // Some conditions require the operands to be swapped. | |||
26137 | if (CC == ISD::SETLT || CC == ISD::SETLE) | |||
26138 | std::swap(LHS, RHS); | |||
26139 | ||||
26140 | SDValue Comi = DAG.getNode(IntrData->Opc0, dl, MVT::i32, LHS, RHS); | |||
26141 | SDValue SetCC; | |||
26142 | switch (CC) { | |||
26143 | case ISD::SETEQ: { // (ZF = 0 and PF = 0) | |||
26144 | SetCC = getSETCC(X86::COND_E, Comi, dl, DAG); | |||
26145 | SDValue SetNP = getSETCC(X86::COND_NP, Comi, dl, DAG); | |||
26146 | SetCC = DAG.getNode(ISD::AND, dl, MVT::i8, SetCC, SetNP); | |||
26147 | break; | |||
26148 | } | |||
26149 | case ISD::SETNE: { // (ZF = 1 or PF = 1) | |||
26150 | SetCC = getSETCC(X86::COND_NE, Comi, dl, DAG); | |||
26151 | SDValue SetP = getSETCC(X86::COND_P, Comi, dl, DAG); | |||
26152 | SetCC = DAG.getNode(ISD::OR, dl, MVT::i8, SetCC, SetP); | |||
26153 | break; | |||
26154 | } | |||
26155 | case ISD::SETGT: // (CF = 0 and ZF = 0) | |||
26156 | case ISD::SETLT: { // Condition opposite to GT. Operands swapped above. | |||
26157 | SetCC = getSETCC(X86::COND_A, Comi, dl, DAG); | |||
26158 | break; | |||
26159 | } | |||
26160 | case ISD::SETGE: // CF = 0 | |||
26161 | case ISD::SETLE: // Condition opposite to GE. Operands swapped above. | |||
26162 | SetCC = getSETCC(X86::COND_AE, Comi, dl, DAG); | |||
26163 | break; | |||
26164 | default: | |||
26165 | llvm_unreachable("Unexpected illegal condition!")::llvm::llvm_unreachable_internal("Unexpected illegal condition!" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 26165); | |||
26166 | } | |||
26167 | return DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, SetCC); | |||
26168 | } | |||
26169 | case COMI_RM: { // Comparison intrinsics with Sae | |||
26170 | SDValue LHS = Op.getOperand(1); | |||
26171 | SDValue RHS = Op.getOperand(2); | |||
26172 | unsigned CondVal = Op.getConstantOperandVal(3); | |||
26173 | SDValue Sae = Op.getOperand(4); | |||
26174 | ||||
26175 | SDValue FCmp; | |||
26176 | if (isRoundModeCurDirection(Sae)) | |||
26177 | FCmp = DAG.getNode(X86ISD::FSETCCM, dl, MVT::v1i1, LHS, RHS, | |||
26178 | DAG.getTargetConstant(CondVal, dl, MVT::i8)); | |||
26179 | else if (isRoundModeSAE(Sae)) | |||
26180 | FCmp = DAG.getNode(X86ISD::FSETCCM_SAE, dl, MVT::v1i1, LHS, RHS, | |||
26181 | DAG.getTargetConstant(CondVal, dl, MVT::i8), Sae); | |||
26182 | else | |||
26183 | return SDValue(); | |||
26184 | // Need to fill with zeros to ensure the bitcast will produce zeroes | |||
26185 | // for the upper bits. An EXTRACT_ELEMENT here wouldn't guarantee that. | |||
26186 | SDValue Ins = DAG.getNode(ISD::INSERT_SUBVECTOR, dl, MVT::v16i1, | |||
26187 | DAG.getConstant(0, dl, MVT::v16i1), | |||
26188 | FCmp, DAG.getIntPtrConstant(0, dl)); | |||
26189 | return DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, | |||
26190 | DAG.getBitcast(MVT::i16, Ins)); | |||
26191 | } | |||
26192 | case VSHIFT: | |||
26193 | return getTargetVShiftNode(IntrData->Opc0, dl, Op.getSimpleValueType(), | |||
26194 | Op.getOperand(1), Op.getOperand(2), Subtarget, | |||
26195 | DAG); | |||
26196 | case COMPRESS_EXPAND_IN_REG: { | |||
26197 | SDValue Mask = Op.getOperand(3); | |||
26198 | SDValue DataToCompress = Op.getOperand(1); | |||
26199 | SDValue PassThru = Op.getOperand(2); | |||
26200 | if (ISD::isBuildVectorAllOnes(Mask.getNode())) // return data as is | |||
26201 | return Op.getOperand(1); | |||
26202 | ||||
26203 | // Avoid false dependency. | |||
26204 | if (PassThru.isUndef()) | |||
26205 | PassThru = DAG.getConstant(0, dl, VT); | |||
26206 | ||||
26207 | return DAG.getNode(IntrData->Opc0, dl, VT, DataToCompress, PassThru, | |||
26208 | Mask); | |||
26209 | } | |||
26210 | case FIXUPIMM: | |||
26211 | case FIXUPIMM_MASKZ: { | |||
26212 | SDValue Src1 = Op.getOperand(1); | |||
26213 | SDValue Src2 = Op.getOperand(2); | |||
26214 | SDValue Src3 = Op.getOperand(3); | |||
26215 | SDValue Imm = Op.getOperand(4); | |||
26216 | SDValue Mask = Op.getOperand(5); | |||
26217 | SDValue Passthru = (IntrData->Type == FIXUPIMM) | |||
26218 | ? Src1 | |||
26219 | : getZeroVector(VT, Subtarget, DAG, dl); | |||
26220 | ||||
26221 | unsigned Opc = IntrData->Opc0; | |||
26222 | if (IntrData->Opc1 != 0) { | |||
26223 | SDValue Sae = Op.getOperand(6); | |||
26224 | if (isRoundModeSAE(Sae)) | |||
26225 | Opc = IntrData->Opc1; | |||
26226 | else if (!isRoundModeCurDirection(Sae)) | |||
26227 | return SDValue(); | |||
26228 | } | |||
26229 | ||||
26230 | SDValue FixupImm = DAG.getNode(Opc, dl, VT, Src1, Src2, Src3, Imm); | |||
26231 | ||||
26232 | if (Opc == X86ISD::VFIXUPIMM || Opc == X86ISD::VFIXUPIMM_SAE) | |||
26233 | return getVectorMaskingNode(FixupImm, Mask, Passthru, Subtarget, DAG); | |||
26234 | ||||
26235 | return getScalarMaskingNode(FixupImm, Mask, Passthru, Subtarget, DAG); | |||
26236 | } | |||
26237 | case ROUNDP: { | |||
26238 | assert(IntrData->Opc0 == X86ISD::VRNDSCALE && "Unexpected opcode")(static_cast <bool> (IntrData->Opc0 == X86ISD::VRNDSCALE && "Unexpected opcode") ? void (0) : __assert_fail ( "IntrData->Opc0 == X86ISD::VRNDSCALE && \"Unexpected opcode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 26238, __extension__ __PRETTY_FUNCTION__)); | |||
26239 | // Clear the upper bits of the rounding immediate so that the legacy | |||
26240 | // intrinsic can't trigger the scaling behavior of VRNDSCALE. | |||
26241 | auto Round = cast<ConstantSDNode>(Op.getOperand(2)); | |||
26242 | SDValue RoundingMode = | |||
26243 | DAG.getTargetConstant(Round->getZExtValue() & 0xf, dl, MVT::i32); | |||
26244 | return DAG.getNode(IntrData->Opc0, dl, Op.getValueType(), | |||
26245 | Op.getOperand(1), RoundingMode); | |||
26246 | } | |||
26247 | case ROUNDS: { | |||
26248 | assert(IntrData->Opc0 == X86ISD::VRNDSCALES && "Unexpected opcode")(static_cast <bool> (IntrData->Opc0 == X86ISD::VRNDSCALES && "Unexpected opcode") ? void (0) : __assert_fail ( "IntrData->Opc0 == X86ISD::VRNDSCALES && \"Unexpected opcode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 26248, __extension__ __PRETTY_FUNCTION__)); | |||
26249 | // Clear the upper bits of the rounding immediate so that the legacy | |||
26250 | // intrinsic can't trigger the scaling behavior of VRNDSCALE. | |||
26251 | auto Round = cast<ConstantSDNode>(Op.getOperand(3)); | |||
26252 | SDValue RoundingMode = | |||
26253 | DAG.getTargetConstant(Round->getZExtValue() & 0xf, dl, MVT::i32); | |||
26254 | return DAG.getNode(IntrData->Opc0, dl, Op.getValueType(), | |||
26255 | Op.getOperand(1), Op.getOperand(2), RoundingMode); | |||
26256 | } | |||
26257 | case BEXTRI: { | |||
26258 | assert(IntrData->Opc0 == X86ISD::BEXTRI && "Unexpected opcode")(static_cast <bool> (IntrData->Opc0 == X86ISD::BEXTRI && "Unexpected opcode") ? void (0) : __assert_fail ( "IntrData->Opc0 == X86ISD::BEXTRI && \"Unexpected opcode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 26258, __extension__ __PRETTY_FUNCTION__)); | |||
26259 | ||||
26260 | uint64_t Imm = Op.getConstantOperandVal(2); | |||
26261 | SDValue Control = DAG.getTargetConstant(Imm & 0xffff, dl, | |||
26262 | Op.getValueType()); | |||
26263 | return DAG.getNode(IntrData->Opc0, dl, Op.getValueType(), | |||
26264 | Op.getOperand(1), Control); | |||
26265 | } | |||
26266 | // ADC/ADCX/SBB | |||
26267 | case ADX: { | |||
26268 | SDVTList CFVTs = DAG.getVTList(Op->getValueType(0), MVT::i32); | |||
26269 | SDVTList VTs = DAG.getVTList(Op.getOperand(2).getValueType(), MVT::i32); | |||
26270 | ||||
26271 | SDValue Res; | |||
26272 | // If the carry in is zero, then we should just use ADD/SUB instead of | |||
26273 | // ADC/SBB. | |||
26274 | if (isNullConstant(Op.getOperand(1))) { | |||
26275 | Res = DAG.getNode(IntrData->Opc1, dl, VTs, Op.getOperand(2), | |||
26276 | Op.getOperand(3)); | |||
26277 | } else { | |||
26278 | SDValue GenCF = DAG.getNode(X86ISD::ADD, dl, CFVTs, Op.getOperand(1), | |||
26279 | DAG.getConstant(-1, dl, MVT::i8)); | |||
26280 | Res = DAG.getNode(IntrData->Opc0, dl, VTs, Op.getOperand(2), | |||
26281 | Op.getOperand(3), GenCF.getValue(1)); | |||
26282 | } | |||
26283 | SDValue SetCC = getSETCC(X86::COND_B, Res.getValue(1), dl, DAG); | |||
26284 | SDValue Results[] = { SetCC, Res }; | |||
26285 | return DAG.getMergeValues(Results, dl); | |||
26286 | } | |||
26287 | case CVTPD2PS_MASK: | |||
26288 | case CVTPD2DQ_MASK: | |||
26289 | case CVTQQ2PS_MASK: | |||
26290 | case TRUNCATE_TO_REG: { | |||
26291 | SDValue Src = Op.getOperand(1); | |||
26292 | SDValue PassThru = Op.getOperand(2); | |||
26293 | SDValue Mask = Op.getOperand(3); | |||
26294 | ||||
26295 | if (isAllOnesConstant(Mask)) | |||
26296 | return DAG.getNode(IntrData->Opc0, dl, Op.getValueType(), Src); | |||
26297 | ||||
26298 | MVT SrcVT = Src.getSimpleValueType(); | |||
26299 | MVT MaskVT = MVT::getVectorVT(MVT::i1, SrcVT.getVectorNumElements()); | |||
26300 | Mask = getMaskNode(Mask, MaskVT, Subtarget, DAG, dl); | |||
26301 | return DAG.getNode(IntrData->Opc1, dl, Op.getValueType(), | |||
26302 | {Src, PassThru, Mask}); | |||
26303 | } | |||
26304 | case CVTPS2PH_MASK: { | |||
26305 | SDValue Src = Op.getOperand(1); | |||
26306 | SDValue Rnd = Op.getOperand(2); | |||
26307 | SDValue PassThru = Op.getOperand(3); | |||
26308 | SDValue Mask = Op.getOperand(4); | |||
26309 | ||||
26310 | if (isAllOnesConstant(Mask)) | |||
26311 | return DAG.getNode(IntrData->Opc0, dl, Op.getValueType(), Src, Rnd); | |||
26312 | ||||
26313 | MVT SrcVT = Src.getSimpleValueType(); | |||
26314 | MVT MaskVT = MVT::getVectorVT(MVT::i1, SrcVT.getVectorNumElements()); | |||
26315 | Mask = getMaskNode(Mask, MaskVT, Subtarget, DAG, dl); | |||
26316 | return DAG.getNode(IntrData->Opc1, dl, Op.getValueType(), Src, Rnd, | |||
26317 | PassThru, Mask); | |||
26318 | ||||
26319 | } | |||
26320 | case CVTNEPS2BF16_MASK: { | |||
26321 | SDValue Src = Op.getOperand(1); | |||
26322 | SDValue PassThru = Op.getOperand(2); | |||
26323 | SDValue Mask = Op.getOperand(3); | |||
26324 | ||||
26325 | if (ISD::isBuildVectorAllOnes(Mask.getNode())) | |||
26326 | return DAG.getNode(IntrData->Opc0, dl, Op.getValueType(), Src); | |||
26327 | ||||
26328 | // Break false dependency. | |||
26329 | if (PassThru.isUndef()) | |||
26330 | PassThru = DAG.getConstant(0, dl, PassThru.getValueType()); | |||
26331 | ||||
26332 | return DAG.getNode(IntrData->Opc1, dl, Op.getValueType(), Src, PassThru, | |||
26333 | Mask); | |||
26334 | } | |||
26335 | default: | |||
26336 | break; | |||
26337 | } | |||
26338 | } | |||
26339 | ||||
26340 | switch (IntNo) { | |||
26341 | default: return SDValue(); // Don't custom lower most intrinsics. | |||
26342 | ||||
26343 | // ptest and testp intrinsics. The intrinsic these come from are designed to | |||
26344 | // return an integer value, not just an instruction so lower it to the ptest | |||
26345 | // or testp pattern and a setcc for the result. | |||
26346 | case Intrinsic::x86_avx512_ktestc_b: | |||
26347 | case Intrinsic::x86_avx512_ktestc_w: | |||
26348 | case Intrinsic::x86_avx512_ktestc_d: | |||
26349 | case Intrinsic::x86_avx512_ktestc_q: | |||
26350 | case Intrinsic::x86_avx512_ktestz_b: | |||
26351 | case Intrinsic::x86_avx512_ktestz_w: | |||
26352 | case Intrinsic::x86_avx512_ktestz_d: | |||
26353 | case Intrinsic::x86_avx512_ktestz_q: | |||
26354 | case Intrinsic::x86_sse41_ptestz: | |||
26355 | case Intrinsic::x86_sse41_ptestc: | |||
26356 | case Intrinsic::x86_sse41_ptestnzc: | |||
26357 | case Intrinsic::x86_avx_ptestz_256: | |||
26358 | case Intrinsic::x86_avx_ptestc_256: | |||
26359 | case Intrinsic::x86_avx_ptestnzc_256: | |||
26360 | case Intrinsic::x86_avx_vtestz_ps: | |||
26361 | case Intrinsic::x86_avx_vtestc_ps: | |||
26362 | case Intrinsic::x86_avx_vtestnzc_ps: | |||
26363 | case Intrinsic::x86_avx_vtestz_pd: | |||
26364 | case Intrinsic::x86_avx_vtestc_pd: | |||
26365 | case Intrinsic::x86_avx_vtestnzc_pd: | |||
26366 | case Intrinsic::x86_avx_vtestz_ps_256: | |||
26367 | case Intrinsic::x86_avx_vtestc_ps_256: | |||
26368 | case Intrinsic::x86_avx_vtestnzc_ps_256: | |||
26369 | case Intrinsic::x86_avx_vtestz_pd_256: | |||
26370 | case Intrinsic::x86_avx_vtestc_pd_256: | |||
26371 | case Intrinsic::x86_avx_vtestnzc_pd_256: { | |||
26372 | unsigned TestOpc = X86ISD::PTEST; | |||
26373 | X86::CondCode X86CC; | |||
26374 | switch (IntNo) { | |||
26375 | default: llvm_unreachable("Bad fallthrough in Intrinsic lowering.")::llvm::llvm_unreachable_internal("Bad fallthrough in Intrinsic lowering." , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 26375); | |||
26376 | case Intrinsic::x86_avx512_ktestc_b: | |||
26377 | case Intrinsic::x86_avx512_ktestc_w: | |||
26378 | case Intrinsic::x86_avx512_ktestc_d: | |||
26379 | case Intrinsic::x86_avx512_ktestc_q: | |||
26380 | // CF = 1 | |||
26381 | TestOpc = X86ISD::KTEST; | |||
26382 | X86CC = X86::COND_B; | |||
26383 | break; | |||
26384 | case Intrinsic::x86_avx512_ktestz_b: | |||
26385 | case Intrinsic::x86_avx512_ktestz_w: | |||
26386 | case Intrinsic::x86_avx512_ktestz_d: | |||
26387 | case Intrinsic::x86_avx512_ktestz_q: | |||
26388 | TestOpc = X86ISD::KTEST; | |||
26389 | X86CC = X86::COND_E; | |||
26390 | break; | |||
26391 | case Intrinsic::x86_avx_vtestz_ps: | |||
26392 | case Intrinsic::x86_avx_vtestz_pd: | |||
26393 | case Intrinsic::x86_avx_vtestz_ps_256: | |||
26394 | case Intrinsic::x86_avx_vtestz_pd_256: | |||
26395 | TestOpc = X86ISD::TESTP; | |||
26396 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
26397 | case Intrinsic::x86_sse41_ptestz: | |||
26398 | case Intrinsic::x86_avx_ptestz_256: | |||
26399 | // ZF = 1 | |||
26400 | X86CC = X86::COND_E; | |||
26401 | break; | |||
26402 | case Intrinsic::x86_avx_vtestc_ps: | |||
26403 | case Intrinsic::x86_avx_vtestc_pd: | |||
26404 | case Intrinsic::x86_avx_vtestc_ps_256: | |||
26405 | case Intrinsic::x86_avx_vtestc_pd_256: | |||
26406 | TestOpc = X86ISD::TESTP; | |||
26407 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
26408 | case Intrinsic::x86_sse41_ptestc: | |||
26409 | case Intrinsic::x86_avx_ptestc_256: | |||
26410 | // CF = 1 | |||
26411 | X86CC = X86::COND_B; | |||
26412 | break; | |||
26413 | case Intrinsic::x86_avx_vtestnzc_ps: | |||
26414 | case Intrinsic::x86_avx_vtestnzc_pd: | |||
26415 | case Intrinsic::x86_avx_vtestnzc_ps_256: | |||
26416 | case Intrinsic::x86_avx_vtestnzc_pd_256: | |||
26417 | TestOpc = X86ISD::TESTP; | |||
26418 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
26419 | case Intrinsic::x86_sse41_ptestnzc: | |||
26420 | case Intrinsic::x86_avx_ptestnzc_256: | |||
26421 | // ZF and CF = 0 | |||
26422 | X86CC = X86::COND_A; | |||
26423 | break; | |||
26424 | } | |||
26425 | ||||
26426 | SDValue LHS = Op.getOperand(1); | |||
26427 | SDValue RHS = Op.getOperand(2); | |||
26428 | SDValue Test = DAG.getNode(TestOpc, dl, MVT::i32, LHS, RHS); | |||
26429 | SDValue SetCC = getSETCC(X86CC, Test, dl, DAG); | |||
26430 | return DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, SetCC); | |||
26431 | } | |||
26432 | ||||
26433 | case Intrinsic::x86_sse42_pcmpistria128: | |||
26434 | case Intrinsic::x86_sse42_pcmpestria128: | |||
26435 | case Intrinsic::x86_sse42_pcmpistric128: | |||
26436 | case Intrinsic::x86_sse42_pcmpestric128: | |||
26437 | case Intrinsic::x86_sse42_pcmpistrio128: | |||
26438 | case Intrinsic::x86_sse42_pcmpestrio128: | |||
26439 | case Intrinsic::x86_sse42_pcmpistris128: | |||
26440 | case Intrinsic::x86_sse42_pcmpestris128: | |||
26441 | case Intrinsic::x86_sse42_pcmpistriz128: | |||
26442 | case Intrinsic::x86_sse42_pcmpestriz128: { | |||
26443 | unsigned Opcode; | |||
26444 | X86::CondCode X86CC; | |||
26445 | switch (IntNo) { | |||
26446 | default: llvm_unreachable("Impossible intrinsic")::llvm::llvm_unreachable_internal("Impossible intrinsic", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 26446); // Can't reach here. | |||
26447 | case Intrinsic::x86_sse42_pcmpistria128: | |||
26448 | Opcode = X86ISD::PCMPISTR; | |||
26449 | X86CC = X86::COND_A; | |||
26450 | break; | |||
26451 | case Intrinsic::x86_sse42_pcmpestria128: | |||
26452 | Opcode = X86ISD::PCMPESTR; | |||
26453 | X86CC = X86::COND_A; | |||
26454 | break; | |||
26455 | case Intrinsic::x86_sse42_pcmpistric128: | |||
26456 | Opcode = X86ISD::PCMPISTR; | |||
26457 | X86CC = X86::COND_B; | |||
26458 | break; | |||
26459 | case Intrinsic::x86_sse42_pcmpestric128: | |||
26460 | Opcode = X86ISD::PCMPESTR; | |||
26461 | X86CC = X86::COND_B; | |||
26462 | break; | |||
26463 | case Intrinsic::x86_sse42_pcmpistrio128: | |||
26464 | Opcode = X86ISD::PCMPISTR; | |||
26465 | X86CC = X86::COND_O; | |||
26466 | break; | |||
26467 | case Intrinsic::x86_sse42_pcmpestrio128: | |||
26468 | Opcode = X86ISD::PCMPESTR; | |||
26469 | X86CC = X86::COND_O; | |||
26470 | break; | |||
26471 | case Intrinsic::x86_sse42_pcmpistris128: | |||
26472 | Opcode = X86ISD::PCMPISTR; | |||
26473 | X86CC = X86::COND_S; | |||
26474 | break; | |||
26475 | case Intrinsic::x86_sse42_pcmpestris128: | |||
26476 | Opcode = X86ISD::PCMPESTR; | |||
26477 | X86CC = X86::COND_S; | |||
26478 | break; | |||
26479 | case Intrinsic::x86_sse42_pcmpistriz128: | |||
26480 | Opcode = X86ISD::PCMPISTR; | |||
26481 | X86CC = X86::COND_E; | |||
26482 | break; | |||
26483 | case Intrinsic::x86_sse42_pcmpestriz128: | |||
26484 | Opcode = X86ISD::PCMPESTR; | |||
26485 | X86CC = X86::COND_E; | |||
26486 | break; | |||
26487 | } | |||
26488 | SmallVector<SDValue, 5> NewOps(Op->op_begin()+1, Op->op_end()); | |||
26489 | SDVTList VTs = DAG.getVTList(MVT::i32, MVT::v16i8, MVT::i32); | |||
26490 | SDValue PCMP = DAG.getNode(Opcode, dl, VTs, NewOps).getValue(2); | |||
26491 | SDValue SetCC = getSETCC(X86CC, PCMP, dl, DAG); | |||
26492 | return DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, SetCC); | |||
26493 | } | |||
26494 | ||||
26495 | case Intrinsic::x86_sse42_pcmpistri128: | |||
26496 | case Intrinsic::x86_sse42_pcmpestri128: { | |||
26497 | unsigned Opcode; | |||
26498 | if (IntNo == Intrinsic::x86_sse42_pcmpistri128) | |||
26499 | Opcode = X86ISD::PCMPISTR; | |||
26500 | else | |||
26501 | Opcode = X86ISD::PCMPESTR; | |||
26502 | ||||
26503 | SmallVector<SDValue, 5> NewOps(Op->op_begin()+1, Op->op_end()); | |||
26504 | SDVTList VTs = DAG.getVTList(MVT::i32, MVT::v16i8, MVT::i32); | |||
26505 | return DAG.getNode(Opcode, dl, VTs, NewOps); | |||
26506 | } | |||
26507 | ||||
26508 | case Intrinsic::x86_sse42_pcmpistrm128: | |||
26509 | case Intrinsic::x86_sse42_pcmpestrm128: { | |||
26510 | unsigned Opcode; | |||
26511 | if (IntNo == Intrinsic::x86_sse42_pcmpistrm128) | |||
26512 | Opcode = X86ISD::PCMPISTR; | |||
26513 | else | |||
26514 | Opcode = X86ISD::PCMPESTR; | |||
26515 | ||||
26516 | SmallVector<SDValue, 5> NewOps(Op->op_begin()+1, Op->op_end()); | |||
26517 | SDVTList VTs = DAG.getVTList(MVT::i32, MVT::v16i8, MVT::i32); | |||
26518 | return DAG.getNode(Opcode, dl, VTs, NewOps).getValue(1); | |||
26519 | } | |||
26520 | ||||
26521 | case Intrinsic::eh_sjlj_lsda: { | |||
26522 | MachineFunction &MF = DAG.getMachineFunction(); | |||
26523 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
26524 | MVT PtrVT = TLI.getPointerTy(DAG.getDataLayout()); | |||
26525 | auto &Context = MF.getMMI().getContext(); | |||
26526 | MCSymbol *S = Context.getOrCreateSymbol(Twine("GCC_except_table") + | |||
26527 | Twine(MF.getFunctionNumber())); | |||
26528 | return DAG.getNode(getGlobalWrapperKind(), dl, VT, | |||
26529 | DAG.getMCSymbol(S, PtrVT)); | |||
26530 | } | |||
26531 | ||||
26532 | case Intrinsic::x86_seh_lsda: { | |||
26533 | // Compute the symbol for the LSDA. We know it'll get emitted later. | |||
26534 | MachineFunction &MF = DAG.getMachineFunction(); | |||
26535 | SDValue Op1 = Op.getOperand(1); | |||
26536 | auto *Fn = cast<Function>(cast<GlobalAddressSDNode>(Op1)->getGlobal()); | |||
26537 | MCSymbol *LSDASym = MF.getMMI().getContext().getOrCreateLSDASymbol( | |||
26538 | GlobalValue::dropLLVMManglingEscape(Fn->getName())); | |||
26539 | ||||
26540 | // Generate a simple absolute symbol reference. This intrinsic is only | |||
26541 | // supported on 32-bit Windows, which isn't PIC. | |||
26542 | SDValue Result = DAG.getMCSymbol(LSDASym, VT); | |||
26543 | return DAG.getNode(X86ISD::Wrapper, dl, VT, Result); | |||
26544 | } | |||
26545 | ||||
26546 | case Intrinsic::eh_recoverfp: { | |||
26547 | SDValue FnOp = Op.getOperand(1); | |||
26548 | SDValue IncomingFPOp = Op.getOperand(2); | |||
26549 | GlobalAddressSDNode *GSD = dyn_cast<GlobalAddressSDNode>(FnOp); | |||
26550 | auto *Fn = dyn_cast_or_null<Function>(GSD ? GSD->getGlobal() : nullptr); | |||
26551 | if (!Fn) | |||
26552 | report_fatal_error( | |||
26553 | "llvm.eh.recoverfp must take a function as the first argument"); | |||
26554 | return recoverFramePointer(DAG, Fn, IncomingFPOp); | |||
26555 | } | |||
26556 | ||||
26557 | case Intrinsic::localaddress: { | |||
26558 | // Returns one of the stack, base, or frame pointer registers, depending on | |||
26559 | // which is used to reference local variables. | |||
26560 | MachineFunction &MF = DAG.getMachineFunction(); | |||
26561 | const X86RegisterInfo *RegInfo = Subtarget.getRegisterInfo(); | |||
26562 | unsigned Reg; | |||
26563 | if (RegInfo->hasBasePointer(MF)) | |||
26564 | Reg = RegInfo->getBaseRegister(); | |||
26565 | else { // Handles the SP or FP case. | |||
26566 | bool CantUseFP = RegInfo->hasStackRealignment(MF); | |||
26567 | if (CantUseFP) | |||
26568 | Reg = RegInfo->getPtrSizedStackRegister(MF); | |||
26569 | else | |||
26570 | Reg = RegInfo->getPtrSizedFrameRegister(MF); | |||
26571 | } | |||
26572 | return DAG.getCopyFromReg(DAG.getEntryNode(), dl, Reg, VT); | |||
26573 | } | |||
26574 | case Intrinsic::swift_async_context_addr: { | |||
26575 | auto &MF = DAG.getMachineFunction(); | |||
26576 | auto X86FI = MF.getInfo<X86MachineFunctionInfo>(); | |||
26577 | if (Subtarget.is64Bit()) { | |||
26578 | MF.getFrameInfo().setFrameAddressIsTaken(true); | |||
26579 | X86FI->setHasSwiftAsyncContext(true); | |||
26580 | return SDValue( | |||
26581 | DAG.getMachineNode( | |||
26582 | X86::SUB64ri8, dl, MVT::i64, | |||
26583 | DAG.getCopyFromReg(DAG.getEntryNode(), dl, X86::RBP, MVT::i64), | |||
26584 | DAG.getTargetConstant(8, dl, MVT::i32)), | |||
26585 | 0); | |||
26586 | } else { | |||
26587 | // 32-bit so no special extended frame, create or reuse an existing stack | |||
26588 | // slot. | |||
26589 | if (!X86FI->getSwiftAsyncContextFrameIdx()) | |||
26590 | X86FI->setSwiftAsyncContextFrameIdx( | |||
26591 | MF.getFrameInfo().CreateStackObject(4, Align(4), false)); | |||
26592 | return DAG.getFrameIndex(*X86FI->getSwiftAsyncContextFrameIdx(), MVT::i32); | |||
26593 | } | |||
26594 | } | |||
26595 | case Intrinsic::x86_avx512_vp2intersect_q_512: | |||
26596 | case Intrinsic::x86_avx512_vp2intersect_q_256: | |||
26597 | case Intrinsic::x86_avx512_vp2intersect_q_128: | |||
26598 | case Intrinsic::x86_avx512_vp2intersect_d_512: | |||
26599 | case Intrinsic::x86_avx512_vp2intersect_d_256: | |||
26600 | case Intrinsic::x86_avx512_vp2intersect_d_128: { | |||
26601 | MVT MaskVT = Op.getSimpleValueType(); | |||
26602 | ||||
26603 | SDVTList VTs = DAG.getVTList(MVT::Untyped, MVT::Other); | |||
26604 | SDLoc DL(Op); | |||
26605 | ||||
26606 | SDValue Operation = | |||
26607 | DAG.getNode(X86ISD::VP2INTERSECT, DL, VTs, | |||
26608 | Op->getOperand(1), Op->getOperand(2)); | |||
26609 | ||||
26610 | SDValue Result0 = DAG.getTargetExtractSubreg(X86::sub_mask_0, DL, | |||
26611 | MaskVT, Operation); | |||
26612 | SDValue Result1 = DAG.getTargetExtractSubreg(X86::sub_mask_1, DL, | |||
26613 | MaskVT, Operation); | |||
26614 | return DAG.getMergeValues({Result0, Result1}, DL); | |||
26615 | } | |||
26616 | case Intrinsic::x86_mmx_pslli_w: | |||
26617 | case Intrinsic::x86_mmx_pslli_d: | |||
26618 | case Intrinsic::x86_mmx_pslli_q: | |||
26619 | case Intrinsic::x86_mmx_psrli_w: | |||
26620 | case Intrinsic::x86_mmx_psrli_d: | |||
26621 | case Intrinsic::x86_mmx_psrli_q: | |||
26622 | case Intrinsic::x86_mmx_psrai_w: | |||
26623 | case Intrinsic::x86_mmx_psrai_d: { | |||
26624 | SDLoc DL(Op); | |||
26625 | SDValue ShAmt = Op.getOperand(2); | |||
26626 | // If the argument is a constant, convert it to a target constant. | |||
26627 | if (auto *C = dyn_cast<ConstantSDNode>(ShAmt)) { | |||
26628 | // Clamp out of bounds shift amounts since they will otherwise be masked | |||
26629 | // to 8-bits which may make it no longer out of bounds. | |||
26630 | unsigned ShiftAmount = C->getAPIntValue().getLimitedValue(255); | |||
26631 | if (ShiftAmount == 0) | |||
26632 | return Op.getOperand(1); | |||
26633 | ||||
26634 | return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, Op.getValueType(), | |||
26635 | Op.getOperand(0), Op.getOperand(1), | |||
26636 | DAG.getTargetConstant(ShiftAmount, DL, MVT::i32)); | |||
26637 | } | |||
26638 | ||||
26639 | unsigned NewIntrinsic; | |||
26640 | switch (IntNo) { | |||
26641 | default: llvm_unreachable("Impossible intrinsic")::llvm::llvm_unreachable_internal("Impossible intrinsic", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 26641); // Can't reach here. | |||
26642 | case Intrinsic::x86_mmx_pslli_w: | |||
26643 | NewIntrinsic = Intrinsic::x86_mmx_psll_w; | |||
26644 | break; | |||
26645 | case Intrinsic::x86_mmx_pslli_d: | |||
26646 | NewIntrinsic = Intrinsic::x86_mmx_psll_d; | |||
26647 | break; | |||
26648 | case Intrinsic::x86_mmx_pslli_q: | |||
26649 | NewIntrinsic = Intrinsic::x86_mmx_psll_q; | |||
26650 | break; | |||
26651 | case Intrinsic::x86_mmx_psrli_w: | |||
26652 | NewIntrinsic = Intrinsic::x86_mmx_psrl_w; | |||
26653 | break; | |||
26654 | case Intrinsic::x86_mmx_psrli_d: | |||
26655 | NewIntrinsic = Intrinsic::x86_mmx_psrl_d; | |||
26656 | break; | |||
26657 | case Intrinsic::x86_mmx_psrli_q: | |||
26658 | NewIntrinsic = Intrinsic::x86_mmx_psrl_q; | |||
26659 | break; | |||
26660 | case Intrinsic::x86_mmx_psrai_w: | |||
26661 | NewIntrinsic = Intrinsic::x86_mmx_psra_w; | |||
26662 | break; | |||
26663 | case Intrinsic::x86_mmx_psrai_d: | |||
26664 | NewIntrinsic = Intrinsic::x86_mmx_psra_d; | |||
26665 | break; | |||
26666 | } | |||
26667 | ||||
26668 | // The vector shift intrinsics with scalars uses 32b shift amounts but | |||
26669 | // the sse2/mmx shift instructions reads 64 bits. Copy the 32 bits to an | |||
26670 | // MMX register. | |||
26671 | ShAmt = DAG.getNode(X86ISD::MMX_MOVW2D, DL, MVT::x86mmx, ShAmt); | |||
26672 | return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, Op.getValueType(), | |||
26673 | DAG.getTargetConstant(NewIntrinsic, DL, | |||
26674 | getPointerTy(DAG.getDataLayout())), | |||
26675 | Op.getOperand(1), ShAmt); | |||
26676 | } | |||
26677 | } | |||
26678 | } | |||
26679 | ||||
26680 | static SDValue getAVX2GatherNode(unsigned Opc, SDValue Op, SelectionDAG &DAG, | |||
26681 | SDValue Src, SDValue Mask, SDValue Base, | |||
26682 | SDValue Index, SDValue ScaleOp, SDValue Chain, | |||
26683 | const X86Subtarget &Subtarget) { | |||
26684 | SDLoc dl(Op); | |||
26685 | auto *C = dyn_cast<ConstantSDNode>(ScaleOp); | |||
26686 | // Scale must be constant. | |||
26687 | if (!C) | |||
26688 | return SDValue(); | |||
26689 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
26690 | SDValue Scale = DAG.getTargetConstant(C->getZExtValue(), dl, | |||
26691 | TLI.getPointerTy(DAG.getDataLayout())); | |||
26692 | EVT MaskVT = Mask.getValueType().changeVectorElementTypeToInteger(); | |||
26693 | SDVTList VTs = DAG.getVTList(Op.getValueType(), MVT::Other); | |||
26694 | // If source is undef or we know it won't be used, use a zero vector | |||
26695 | // to break register dependency. | |||
26696 | // TODO: use undef instead and let BreakFalseDeps deal with it? | |||
26697 | if (Src.isUndef() || ISD::isBuildVectorAllOnes(Mask.getNode())) | |||
26698 | Src = getZeroVector(Op.getSimpleValueType(), Subtarget, DAG, dl); | |||
26699 | ||||
26700 | // Cast mask to an integer type. | |||
26701 | Mask = DAG.getBitcast(MaskVT, Mask); | |||
26702 | ||||
26703 | MemIntrinsicSDNode *MemIntr = cast<MemIntrinsicSDNode>(Op); | |||
26704 | ||||
26705 | SDValue Ops[] = {Chain, Src, Mask, Base, Index, Scale }; | |||
26706 | SDValue Res = | |||
26707 | DAG.getMemIntrinsicNode(X86ISD::MGATHER, dl, VTs, Ops, | |||
26708 | MemIntr->getMemoryVT(), MemIntr->getMemOperand()); | |||
26709 | return DAG.getMergeValues({Res, Res.getValue(1)}, dl); | |||
26710 | } | |||
26711 | ||||
26712 | static SDValue getGatherNode(SDValue Op, SelectionDAG &DAG, | |||
26713 | SDValue Src, SDValue Mask, SDValue Base, | |||
26714 | SDValue Index, SDValue ScaleOp, SDValue Chain, | |||
26715 | const X86Subtarget &Subtarget) { | |||
26716 | MVT VT = Op.getSimpleValueType(); | |||
26717 | SDLoc dl(Op); | |||
26718 | auto *C = dyn_cast<ConstantSDNode>(ScaleOp); | |||
26719 | // Scale must be constant. | |||
26720 | if (!C) | |||
26721 | return SDValue(); | |||
26722 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
26723 | SDValue Scale = DAG.getTargetConstant(C->getZExtValue(), dl, | |||
26724 | TLI.getPointerTy(DAG.getDataLayout())); | |||
26725 | unsigned MinElts = std::min(Index.getSimpleValueType().getVectorNumElements(), | |||
26726 | VT.getVectorNumElements()); | |||
26727 | MVT MaskVT = MVT::getVectorVT(MVT::i1, MinElts); | |||
26728 | ||||
26729 | // We support two versions of the gather intrinsics. One with scalar mask and | |||
26730 | // one with vXi1 mask. Convert scalar to vXi1 if necessary. | |||
26731 | if (Mask.getValueType() != MaskVT) | |||
26732 | Mask = getMaskNode(Mask, MaskVT, Subtarget, DAG, dl); | |||
26733 | ||||
26734 | SDVTList VTs = DAG.getVTList(Op.getValueType(), MVT::Other); | |||
26735 | // If source is undef or we know it won't be used, use a zero vector | |||
26736 | // to break register dependency. | |||
26737 | // TODO: use undef instead and let BreakFalseDeps deal with it? | |||
26738 | if (Src.isUndef() || ISD::isBuildVectorAllOnes(Mask.getNode())) | |||
26739 | Src = getZeroVector(Op.getSimpleValueType(), Subtarget, DAG, dl); | |||
26740 | ||||
26741 | MemIntrinsicSDNode *MemIntr = cast<MemIntrinsicSDNode>(Op); | |||
26742 | ||||
26743 | SDValue Ops[] = {Chain, Src, Mask, Base, Index, Scale }; | |||
26744 | SDValue Res = | |||
26745 | DAG.getMemIntrinsicNode(X86ISD::MGATHER, dl, VTs, Ops, | |||
26746 | MemIntr->getMemoryVT(), MemIntr->getMemOperand()); | |||
26747 | return DAG.getMergeValues({Res, Res.getValue(1)}, dl); | |||
26748 | } | |||
26749 | ||||
26750 | static SDValue getScatterNode(unsigned Opc, SDValue Op, SelectionDAG &DAG, | |||
26751 | SDValue Src, SDValue Mask, SDValue Base, | |||
26752 | SDValue Index, SDValue ScaleOp, SDValue Chain, | |||
26753 | const X86Subtarget &Subtarget) { | |||
26754 | SDLoc dl(Op); | |||
26755 | auto *C = dyn_cast<ConstantSDNode>(ScaleOp); | |||
26756 | // Scale must be constant. | |||
26757 | if (!C) | |||
26758 | return SDValue(); | |||
26759 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
26760 | SDValue Scale = DAG.getTargetConstant(C->getZExtValue(), dl, | |||
26761 | TLI.getPointerTy(DAG.getDataLayout())); | |||
26762 | unsigned MinElts = std::min(Index.getSimpleValueType().getVectorNumElements(), | |||
26763 | Src.getSimpleValueType().getVectorNumElements()); | |||
26764 | MVT MaskVT = MVT::getVectorVT(MVT::i1, MinElts); | |||
26765 | ||||
26766 | // We support two versions of the scatter intrinsics. One with scalar mask and | |||
26767 | // one with vXi1 mask. Convert scalar to vXi1 if necessary. | |||
26768 | if (Mask.getValueType() != MaskVT) | |||
26769 | Mask = getMaskNode(Mask, MaskVT, Subtarget, DAG, dl); | |||
26770 | ||||
26771 | MemIntrinsicSDNode *MemIntr = cast<MemIntrinsicSDNode>(Op); | |||
26772 | ||||
26773 | SDVTList VTs = DAG.getVTList(MVT::Other); | |||
26774 | SDValue Ops[] = {Chain, Src, Mask, Base, Index, Scale}; | |||
26775 | SDValue Res = | |||
26776 | DAG.getMemIntrinsicNode(X86ISD::MSCATTER, dl, VTs, Ops, | |||
26777 | MemIntr->getMemoryVT(), MemIntr->getMemOperand()); | |||
26778 | return Res; | |||
26779 | } | |||
26780 | ||||
26781 | static SDValue getPrefetchNode(unsigned Opc, SDValue Op, SelectionDAG &DAG, | |||
26782 | SDValue Mask, SDValue Base, SDValue Index, | |||
26783 | SDValue ScaleOp, SDValue Chain, | |||
26784 | const X86Subtarget &Subtarget) { | |||
26785 | SDLoc dl(Op); | |||
26786 | auto *C = dyn_cast<ConstantSDNode>(ScaleOp); | |||
26787 | // Scale must be constant. | |||
26788 | if (!C) | |||
26789 | return SDValue(); | |||
26790 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
26791 | SDValue Scale = DAG.getTargetConstant(C->getZExtValue(), dl, | |||
26792 | TLI.getPointerTy(DAG.getDataLayout())); | |||
26793 | SDValue Disp = DAG.getTargetConstant(0, dl, MVT::i32); | |||
26794 | SDValue Segment = DAG.getRegister(0, MVT::i32); | |||
26795 | MVT MaskVT = | |||
26796 | MVT::getVectorVT(MVT::i1, Index.getSimpleValueType().getVectorNumElements()); | |||
26797 | SDValue VMask = getMaskNode(Mask, MaskVT, Subtarget, DAG, dl); | |||
26798 | SDValue Ops[] = {VMask, Base, Scale, Index, Disp, Segment, Chain}; | |||
26799 | SDNode *Res = DAG.getMachineNode(Opc, dl, MVT::Other, Ops); | |||
26800 | return SDValue(Res, 0); | |||
26801 | } | |||
26802 | ||||
26803 | /// Handles the lowering of builtin intrinsics with chain that return their | |||
26804 | /// value into registers EDX:EAX. | |||
26805 | /// If operand ScrReg is a valid register identifier, then operand 2 of N is | |||
26806 | /// copied to SrcReg. The assumption is that SrcReg is an implicit input to | |||
26807 | /// TargetOpcode. | |||
26808 | /// Returns a Glue value which can be used to add extra copy-from-reg if the | |||
26809 | /// expanded intrinsics implicitly defines extra registers (i.e. not just | |||
26810 | /// EDX:EAX). | |||
26811 | static SDValue expandIntrinsicWChainHelper(SDNode *N, const SDLoc &DL, | |||
26812 | SelectionDAG &DAG, | |||
26813 | unsigned TargetOpcode, | |||
26814 | unsigned SrcReg, | |||
26815 | const X86Subtarget &Subtarget, | |||
26816 | SmallVectorImpl<SDValue> &Results) { | |||
26817 | SDValue Chain = N->getOperand(0); | |||
26818 | SDValue Glue; | |||
26819 | ||||
26820 | if (SrcReg) { | |||
26821 | assert(N->getNumOperands() == 3 && "Unexpected number of operands!")(static_cast <bool> (N->getNumOperands() == 3 && "Unexpected number of operands!") ? void (0) : __assert_fail ("N->getNumOperands() == 3 && \"Unexpected number of operands!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 26821, __extension__ __PRETTY_FUNCTION__)); | |||
26822 | Chain = DAG.getCopyToReg(Chain, DL, SrcReg, N->getOperand(2), Glue); | |||
26823 | Glue = Chain.getValue(1); | |||
26824 | } | |||
26825 | ||||
26826 | SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Glue); | |||
26827 | SDValue N1Ops[] = {Chain, Glue}; | |||
26828 | SDNode *N1 = DAG.getMachineNode( | |||
26829 | TargetOpcode, DL, Tys, ArrayRef<SDValue>(N1Ops, Glue.getNode() ? 2 : 1)); | |||
26830 | Chain = SDValue(N1, 0); | |||
26831 | ||||
26832 | // Reads the content of XCR and returns it in registers EDX:EAX. | |||
26833 | SDValue LO, HI; | |||
26834 | if (Subtarget.is64Bit()) { | |||
26835 | LO = DAG.getCopyFromReg(Chain, DL, X86::RAX, MVT::i64, SDValue(N1, 1)); | |||
26836 | HI = DAG.getCopyFromReg(LO.getValue(1), DL, X86::RDX, MVT::i64, | |||
26837 | LO.getValue(2)); | |||
26838 | } else { | |||
26839 | LO = DAG.getCopyFromReg(Chain, DL, X86::EAX, MVT::i32, SDValue(N1, 1)); | |||
26840 | HI = DAG.getCopyFromReg(LO.getValue(1), DL, X86::EDX, MVT::i32, | |||
26841 | LO.getValue(2)); | |||
26842 | } | |||
26843 | Chain = HI.getValue(1); | |||
26844 | Glue = HI.getValue(2); | |||
26845 | ||||
26846 | if (Subtarget.is64Bit()) { | |||
26847 | // Merge the two 32-bit values into a 64-bit one. | |||
26848 | SDValue Tmp = DAG.getNode(ISD::SHL, DL, MVT::i64, HI, | |||
26849 | DAG.getConstant(32, DL, MVT::i8)); | |||
26850 | Results.push_back(DAG.getNode(ISD::OR, DL, MVT::i64, LO, Tmp)); | |||
26851 | Results.push_back(Chain); | |||
26852 | return Glue; | |||
26853 | } | |||
26854 | ||||
26855 | // Use a buildpair to merge the two 32-bit values into a 64-bit one. | |||
26856 | SDValue Ops[] = { LO, HI }; | |||
26857 | SDValue Pair = DAG.getNode(ISD::BUILD_PAIR, DL, MVT::i64, Ops); | |||
26858 | Results.push_back(Pair); | |||
26859 | Results.push_back(Chain); | |||
26860 | return Glue; | |||
26861 | } | |||
26862 | ||||
26863 | /// Handles the lowering of builtin intrinsics that read the time stamp counter | |||
26864 | /// (x86_rdtsc and x86_rdtscp). This function is also used to custom lower | |||
26865 | /// READCYCLECOUNTER nodes. | |||
26866 | static void getReadTimeStampCounter(SDNode *N, const SDLoc &DL, unsigned Opcode, | |||
26867 | SelectionDAG &DAG, | |||
26868 | const X86Subtarget &Subtarget, | |||
26869 | SmallVectorImpl<SDValue> &Results) { | |||
26870 | // The processor's time-stamp counter (a 64-bit MSR) is stored into the | |||
26871 | // EDX:EAX registers. EDX is loaded with the high-order 32 bits of the MSR | |||
26872 | // and the EAX register is loaded with the low-order 32 bits. | |||
26873 | SDValue Glue = expandIntrinsicWChainHelper(N, DL, DAG, Opcode, | |||
26874 | /* NoRegister */0, Subtarget, | |||
26875 | Results); | |||
26876 | if (Opcode != X86::RDTSCP) | |||
26877 | return; | |||
26878 | ||||
26879 | SDValue Chain = Results[1]; | |||
26880 | // Instruction RDTSCP loads the IA32:TSC_AUX_MSR (address C000_0103H) into | |||
26881 | // the ECX register. Add 'ecx' explicitly to the chain. | |||
26882 | SDValue ecx = DAG.getCopyFromReg(Chain, DL, X86::ECX, MVT::i32, Glue); | |||
26883 | Results[1] = ecx; | |||
26884 | Results.push_back(ecx.getValue(1)); | |||
26885 | } | |||
26886 | ||||
26887 | static SDValue LowerREADCYCLECOUNTER(SDValue Op, const X86Subtarget &Subtarget, | |||
26888 | SelectionDAG &DAG) { | |||
26889 | SmallVector<SDValue, 3> Results; | |||
26890 | SDLoc DL(Op); | |||
26891 | getReadTimeStampCounter(Op.getNode(), DL, X86::RDTSC, DAG, Subtarget, | |||
26892 | Results); | |||
26893 | return DAG.getMergeValues(Results, DL); | |||
26894 | } | |||
26895 | ||||
26896 | static SDValue MarkEHRegistrationNode(SDValue Op, SelectionDAG &DAG) { | |||
26897 | MachineFunction &MF = DAG.getMachineFunction(); | |||
26898 | SDValue Chain = Op.getOperand(0); | |||
26899 | SDValue RegNode = Op.getOperand(2); | |||
26900 | WinEHFuncInfo *EHInfo = MF.getWinEHFuncInfo(); | |||
26901 | if (!EHInfo) | |||
26902 | report_fatal_error("EH registrations only live in functions using WinEH"); | |||
26903 | ||||
26904 | // Cast the operand to an alloca, and remember the frame index. | |||
26905 | auto *FINode = dyn_cast<FrameIndexSDNode>(RegNode); | |||
26906 | if (!FINode) | |||
26907 | report_fatal_error("llvm.x86.seh.ehregnode expects a static alloca"); | |||
26908 | EHInfo->EHRegNodeFrameIndex = FINode->getIndex(); | |||
26909 | ||||
26910 | // Return the chain operand without making any DAG nodes. | |||
26911 | return Chain; | |||
26912 | } | |||
26913 | ||||
26914 | static SDValue MarkEHGuard(SDValue Op, SelectionDAG &DAG) { | |||
26915 | MachineFunction &MF = DAG.getMachineFunction(); | |||
26916 | SDValue Chain = Op.getOperand(0); | |||
26917 | SDValue EHGuard = Op.getOperand(2); | |||
26918 | WinEHFuncInfo *EHInfo = MF.getWinEHFuncInfo(); | |||
26919 | if (!EHInfo) | |||
26920 | report_fatal_error("EHGuard only live in functions using WinEH"); | |||
26921 | ||||
26922 | // Cast the operand to an alloca, and remember the frame index. | |||
26923 | auto *FINode = dyn_cast<FrameIndexSDNode>(EHGuard); | |||
26924 | if (!FINode) | |||
26925 | report_fatal_error("llvm.x86.seh.ehguard expects a static alloca"); | |||
26926 | EHInfo->EHGuardFrameIndex = FINode->getIndex(); | |||
26927 | ||||
26928 | // Return the chain operand without making any DAG nodes. | |||
26929 | return Chain; | |||
26930 | } | |||
26931 | ||||
26932 | /// Emit Truncating Store with signed or unsigned saturation. | |||
26933 | static SDValue | |||
26934 | EmitTruncSStore(bool SignedSat, SDValue Chain, const SDLoc &Dl, SDValue Val, | |||
26935 | SDValue Ptr, EVT MemVT, MachineMemOperand *MMO, | |||
26936 | SelectionDAG &DAG) { | |||
26937 | SDVTList VTs = DAG.getVTList(MVT::Other); | |||
26938 | SDValue Undef = DAG.getUNDEF(Ptr.getValueType()); | |||
26939 | SDValue Ops[] = { Chain, Val, Ptr, Undef }; | |||
26940 | unsigned Opc = SignedSat ? X86ISD::VTRUNCSTORES : X86ISD::VTRUNCSTOREUS; | |||
26941 | return DAG.getMemIntrinsicNode(Opc, Dl, VTs, Ops, MemVT, MMO); | |||
26942 | } | |||
26943 | ||||
26944 | /// Emit Masked Truncating Store with signed or unsigned saturation. | |||
26945 | static SDValue | |||
26946 | EmitMaskedTruncSStore(bool SignedSat, SDValue Chain, const SDLoc &Dl, | |||
26947 | SDValue Val, SDValue Ptr, SDValue Mask, EVT MemVT, | |||
26948 | MachineMemOperand *MMO, SelectionDAG &DAG) { | |||
26949 | SDVTList VTs = DAG.getVTList(MVT::Other); | |||
26950 | SDValue Ops[] = { Chain, Val, Ptr, Mask }; | |||
26951 | unsigned Opc = SignedSat ? X86ISD::VMTRUNCSTORES : X86ISD::VMTRUNCSTOREUS; | |||
26952 | return DAG.getMemIntrinsicNode(Opc, Dl, VTs, Ops, MemVT, MMO); | |||
26953 | } | |||
26954 | ||||
26955 | static SDValue LowerINTRINSIC_W_CHAIN(SDValue Op, const X86Subtarget &Subtarget, | |||
26956 | SelectionDAG &DAG) { | |||
26957 | unsigned IntNo = Op.getConstantOperandVal(1); | |||
26958 | const IntrinsicData *IntrData = getIntrinsicWithChain(IntNo); | |||
26959 | if (!IntrData) { | |||
26960 | switch (IntNo) { | |||
26961 | case llvm::Intrinsic::x86_seh_ehregnode: | |||
26962 | return MarkEHRegistrationNode(Op, DAG); | |||
26963 | case llvm::Intrinsic::x86_seh_ehguard: | |||
26964 | return MarkEHGuard(Op, DAG); | |||
26965 | case llvm::Intrinsic::x86_rdpkru: { | |||
26966 | SDLoc dl(Op); | |||
26967 | SDVTList VTs = DAG.getVTList(MVT::i32, MVT::Other); | |||
26968 | // Create a RDPKRU node and pass 0 to the ECX parameter. | |||
26969 | return DAG.getNode(X86ISD::RDPKRU, dl, VTs, Op.getOperand(0), | |||
26970 | DAG.getConstant(0, dl, MVT::i32)); | |||
26971 | } | |||
26972 | case llvm::Intrinsic::x86_wrpkru: { | |||
26973 | SDLoc dl(Op); | |||
26974 | // Create a WRPKRU node, pass the input to the EAX parameter, and pass 0 | |||
26975 | // to the EDX and ECX parameters. | |||
26976 | return DAG.getNode(X86ISD::WRPKRU, dl, MVT::Other, | |||
26977 | Op.getOperand(0), Op.getOperand(2), | |||
26978 | DAG.getConstant(0, dl, MVT::i32), | |||
26979 | DAG.getConstant(0, dl, MVT::i32)); | |||
26980 | } | |||
26981 | case llvm::Intrinsic::x86_flags_read_u32: | |||
26982 | case llvm::Intrinsic::x86_flags_read_u64: | |||
26983 | case llvm::Intrinsic::x86_flags_write_u32: | |||
26984 | case llvm::Intrinsic::x86_flags_write_u64: { | |||
26985 | // We need a frame pointer because this will get lowered to a PUSH/POP | |||
26986 | // sequence. | |||
26987 | MachineFrameInfo &MFI = DAG.getMachineFunction().getFrameInfo(); | |||
26988 | MFI.setHasCopyImplyingStackAdjustment(true); | |||
26989 | // Don't do anything here, we will expand these intrinsics out later | |||
26990 | // during FinalizeISel in EmitInstrWithCustomInserter. | |||
26991 | return Op; | |||
26992 | } | |||
26993 | case Intrinsic::x86_lwpins32: | |||
26994 | case Intrinsic::x86_lwpins64: | |||
26995 | case Intrinsic::x86_umwait: | |||
26996 | case Intrinsic::x86_tpause: { | |||
26997 | SDLoc dl(Op); | |||
26998 | SDValue Chain = Op->getOperand(0); | |||
26999 | SDVTList VTs = DAG.getVTList(MVT::i32, MVT::Other); | |||
27000 | unsigned Opcode; | |||
27001 | ||||
27002 | switch (IntNo) { | |||
27003 | default: llvm_unreachable("Impossible intrinsic")::llvm::llvm_unreachable_internal("Impossible intrinsic", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 27003); | |||
27004 | case Intrinsic::x86_umwait: | |||
27005 | Opcode = X86ISD::UMWAIT; | |||
27006 | break; | |||
27007 | case Intrinsic::x86_tpause: | |||
27008 | Opcode = X86ISD::TPAUSE; | |||
27009 | break; | |||
27010 | case Intrinsic::x86_lwpins32: | |||
27011 | case Intrinsic::x86_lwpins64: | |||
27012 | Opcode = X86ISD::LWPINS; | |||
27013 | break; | |||
27014 | } | |||
27015 | ||||
27016 | SDValue Operation = | |||
27017 | DAG.getNode(Opcode, dl, VTs, Chain, Op->getOperand(2), | |||
27018 | Op->getOperand(3), Op->getOperand(4)); | |||
27019 | SDValue SetCC = getSETCC(X86::COND_B, Operation.getValue(0), dl, DAG); | |||
27020 | return DAG.getNode(ISD::MERGE_VALUES, dl, Op->getVTList(), SetCC, | |||
27021 | Operation.getValue(1)); | |||
27022 | } | |||
27023 | case Intrinsic::x86_enqcmd: | |||
27024 | case Intrinsic::x86_enqcmds: { | |||
27025 | SDLoc dl(Op); | |||
27026 | SDValue Chain = Op.getOperand(0); | |||
27027 | SDVTList VTs = DAG.getVTList(MVT::i32, MVT::Other); | |||
27028 | unsigned Opcode; | |||
27029 | switch (IntNo) { | |||
27030 | default: llvm_unreachable("Impossible intrinsic!")::llvm::llvm_unreachable_internal("Impossible intrinsic!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 27030); | |||
27031 | case Intrinsic::x86_enqcmd: | |||
27032 | Opcode = X86ISD::ENQCMD; | |||
27033 | break; | |||
27034 | case Intrinsic::x86_enqcmds: | |||
27035 | Opcode = X86ISD::ENQCMDS; | |||
27036 | break; | |||
27037 | } | |||
27038 | SDValue Operation = DAG.getNode(Opcode, dl, VTs, Chain, Op.getOperand(2), | |||
27039 | Op.getOperand(3)); | |||
27040 | SDValue SetCC = getSETCC(X86::COND_E, Operation.getValue(0), dl, DAG); | |||
27041 | return DAG.getNode(ISD::MERGE_VALUES, dl, Op->getVTList(), SetCC, | |||
27042 | Operation.getValue(1)); | |||
27043 | } | |||
27044 | case Intrinsic::x86_aesenc128kl: | |||
27045 | case Intrinsic::x86_aesdec128kl: | |||
27046 | case Intrinsic::x86_aesenc256kl: | |||
27047 | case Intrinsic::x86_aesdec256kl: { | |||
27048 | SDLoc DL(Op); | |||
27049 | SDVTList VTs = DAG.getVTList(MVT::v2i64, MVT::i32, MVT::Other); | |||
27050 | SDValue Chain = Op.getOperand(0); | |||
27051 | unsigned Opcode; | |||
27052 | ||||
27053 | switch (IntNo) { | |||
27054 | default: llvm_unreachable("Impossible intrinsic")::llvm::llvm_unreachable_internal("Impossible intrinsic", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 27054); | |||
27055 | case Intrinsic::x86_aesenc128kl: | |||
27056 | Opcode = X86ISD::AESENC128KL; | |||
27057 | break; | |||
27058 | case Intrinsic::x86_aesdec128kl: | |||
27059 | Opcode = X86ISD::AESDEC128KL; | |||
27060 | break; | |||
27061 | case Intrinsic::x86_aesenc256kl: | |||
27062 | Opcode = X86ISD::AESENC256KL; | |||
27063 | break; | |||
27064 | case Intrinsic::x86_aesdec256kl: | |||
27065 | Opcode = X86ISD::AESDEC256KL; | |||
27066 | break; | |||
27067 | } | |||
27068 | ||||
27069 | MemIntrinsicSDNode *MemIntr = cast<MemIntrinsicSDNode>(Op); | |||
27070 | MachineMemOperand *MMO = MemIntr->getMemOperand(); | |||
27071 | EVT MemVT = MemIntr->getMemoryVT(); | |||
27072 | SDValue Operation = DAG.getMemIntrinsicNode( | |||
27073 | Opcode, DL, VTs, {Chain, Op.getOperand(2), Op.getOperand(3)}, MemVT, | |||
27074 | MMO); | |||
27075 | SDValue ZF = getSETCC(X86::COND_E, Operation.getValue(1), DL, DAG); | |||
27076 | ||||
27077 | return DAG.getNode(ISD::MERGE_VALUES, DL, Op->getVTList(), | |||
27078 | {ZF, Operation.getValue(0), Operation.getValue(2)}); | |||
27079 | } | |||
27080 | case Intrinsic::x86_aesencwide128kl: | |||
27081 | case Intrinsic::x86_aesdecwide128kl: | |||
27082 | case Intrinsic::x86_aesencwide256kl: | |||
27083 | case Intrinsic::x86_aesdecwide256kl: { | |||
27084 | SDLoc DL(Op); | |||
27085 | SDVTList VTs = DAG.getVTList( | |||
27086 | {MVT::i32, MVT::v2i64, MVT::v2i64, MVT::v2i64, MVT::v2i64, MVT::v2i64, | |||
27087 | MVT::v2i64, MVT::v2i64, MVT::v2i64, MVT::Other}); | |||
27088 | SDValue Chain = Op.getOperand(0); | |||
27089 | unsigned Opcode; | |||
27090 | ||||
27091 | switch (IntNo) { | |||
27092 | default: llvm_unreachable("Impossible intrinsic")::llvm::llvm_unreachable_internal("Impossible intrinsic", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 27092); | |||
27093 | case Intrinsic::x86_aesencwide128kl: | |||
27094 | Opcode = X86ISD::AESENCWIDE128KL; | |||
27095 | break; | |||
27096 | case Intrinsic::x86_aesdecwide128kl: | |||
27097 | Opcode = X86ISD::AESDECWIDE128KL; | |||
27098 | break; | |||
27099 | case Intrinsic::x86_aesencwide256kl: | |||
27100 | Opcode = X86ISD::AESENCWIDE256KL; | |||
27101 | break; | |||
27102 | case Intrinsic::x86_aesdecwide256kl: | |||
27103 | Opcode = X86ISD::AESDECWIDE256KL; | |||
27104 | break; | |||
27105 | } | |||
27106 | ||||
27107 | MemIntrinsicSDNode *MemIntr = cast<MemIntrinsicSDNode>(Op); | |||
27108 | MachineMemOperand *MMO = MemIntr->getMemOperand(); | |||
27109 | EVT MemVT = MemIntr->getMemoryVT(); | |||
27110 | SDValue Operation = DAG.getMemIntrinsicNode( | |||
27111 | Opcode, DL, VTs, | |||
27112 | {Chain, Op.getOperand(2), Op.getOperand(3), Op.getOperand(4), | |||
27113 | Op.getOperand(5), Op.getOperand(6), Op.getOperand(7), | |||
27114 | Op.getOperand(8), Op.getOperand(9), Op.getOperand(10)}, | |||
27115 | MemVT, MMO); | |||
27116 | SDValue ZF = getSETCC(X86::COND_E, Operation.getValue(0), DL, DAG); | |||
27117 | ||||
27118 | return DAG.getNode(ISD::MERGE_VALUES, DL, Op->getVTList(), | |||
27119 | {ZF, Operation.getValue(1), Operation.getValue(2), | |||
27120 | Operation.getValue(3), Operation.getValue(4), | |||
27121 | Operation.getValue(5), Operation.getValue(6), | |||
27122 | Operation.getValue(7), Operation.getValue(8), | |||
27123 | Operation.getValue(9)}); | |||
27124 | } | |||
27125 | case Intrinsic::x86_testui: { | |||
27126 | SDLoc dl(Op); | |||
27127 | SDValue Chain = Op.getOperand(0); | |||
27128 | SDVTList VTs = DAG.getVTList(MVT::i32, MVT::Other); | |||
27129 | SDValue Operation = DAG.getNode(X86ISD::TESTUI, dl, VTs, Chain); | |||
27130 | SDValue SetCC = getSETCC(X86::COND_B, Operation.getValue(0), dl, DAG); | |||
27131 | return DAG.getNode(ISD::MERGE_VALUES, dl, Op->getVTList(), SetCC, | |||
27132 | Operation.getValue(1)); | |||
27133 | } | |||
27134 | } | |||
27135 | return SDValue(); | |||
27136 | } | |||
27137 | ||||
27138 | SDLoc dl(Op); | |||
27139 | switch(IntrData->Type) { | |||
27140 | default: llvm_unreachable("Unknown Intrinsic Type")::llvm::llvm_unreachable_internal("Unknown Intrinsic Type", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 27140); | |||
27141 | case RDSEED: | |||
27142 | case RDRAND: { | |||
27143 | // Emit the node with the right value type. | |||
27144 | SDVTList VTs = DAG.getVTList(Op->getValueType(0), MVT::i32, MVT::Other); | |||
27145 | SDValue Result = DAG.getNode(IntrData->Opc0, dl, VTs, Op.getOperand(0)); | |||
27146 | ||||
27147 | // If the value returned by RDRAND/RDSEED was valid (CF=1), return 1. | |||
27148 | // Otherwise return the value from Rand, which is always 0, casted to i32. | |||
27149 | SDValue Ops[] = {DAG.getZExtOrTrunc(Result, dl, Op->getValueType(1)), | |||
27150 | DAG.getConstant(1, dl, Op->getValueType(1)), | |||
27151 | DAG.getTargetConstant(X86::COND_B, dl, MVT::i8), | |||
27152 | SDValue(Result.getNode(), 1)}; | |||
27153 | SDValue isValid = DAG.getNode(X86ISD::CMOV, dl, Op->getValueType(1), Ops); | |||
27154 | ||||
27155 | // Return { result, isValid, chain }. | |||
27156 | return DAG.getNode(ISD::MERGE_VALUES, dl, Op->getVTList(), Result, isValid, | |||
27157 | SDValue(Result.getNode(), 2)); | |||
27158 | } | |||
27159 | case GATHER_AVX2: { | |||
27160 | SDValue Chain = Op.getOperand(0); | |||
27161 | SDValue Src = Op.getOperand(2); | |||
27162 | SDValue Base = Op.getOperand(3); | |||
27163 | SDValue Index = Op.getOperand(4); | |||
27164 | SDValue Mask = Op.getOperand(5); | |||
27165 | SDValue Scale = Op.getOperand(6); | |||
27166 | return getAVX2GatherNode(IntrData->Opc0, Op, DAG, Src, Mask, Base, Index, | |||
27167 | Scale, Chain, Subtarget); | |||
27168 | } | |||
27169 | case GATHER: { | |||
27170 | //gather(v1, mask, index, base, scale); | |||
27171 | SDValue Chain = Op.getOperand(0); | |||
27172 | SDValue Src = Op.getOperand(2); | |||
27173 | SDValue Base = Op.getOperand(3); | |||
27174 | SDValue Index = Op.getOperand(4); | |||
27175 | SDValue Mask = Op.getOperand(5); | |||
27176 | SDValue Scale = Op.getOperand(6); | |||
27177 | return getGatherNode(Op, DAG, Src, Mask, Base, Index, Scale, | |||
27178 | Chain, Subtarget); | |||
27179 | } | |||
27180 | case SCATTER: { | |||
27181 | //scatter(base, mask, index, v1, scale); | |||
27182 | SDValue Chain = Op.getOperand(0); | |||
27183 | SDValue Base = Op.getOperand(2); | |||
27184 | SDValue Mask = Op.getOperand(3); | |||
27185 | SDValue Index = Op.getOperand(4); | |||
27186 | SDValue Src = Op.getOperand(5); | |||
27187 | SDValue Scale = Op.getOperand(6); | |||
27188 | return getScatterNode(IntrData->Opc0, Op, DAG, Src, Mask, Base, Index, | |||
27189 | Scale, Chain, Subtarget); | |||
27190 | } | |||
27191 | case PREFETCH: { | |||
27192 | const APInt &HintVal = Op.getConstantOperandAPInt(6); | |||
27193 | assert((HintVal == 2 || HintVal == 3) &&(static_cast <bool> ((HintVal == 2 || HintVal == 3) && "Wrong prefetch hint in intrinsic: should be 2 or 3") ? void (0) : __assert_fail ("(HintVal == 2 || HintVal == 3) && \"Wrong prefetch hint in intrinsic: should be 2 or 3\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 27194, __extension__ __PRETTY_FUNCTION__)) | |||
27194 | "Wrong prefetch hint in intrinsic: should be 2 or 3")(static_cast <bool> ((HintVal == 2 || HintVal == 3) && "Wrong prefetch hint in intrinsic: should be 2 or 3") ? void (0) : __assert_fail ("(HintVal == 2 || HintVal == 3) && \"Wrong prefetch hint in intrinsic: should be 2 or 3\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 27194, __extension__ __PRETTY_FUNCTION__)); | |||
27195 | unsigned Opcode = (HintVal == 2 ? IntrData->Opc1 : IntrData->Opc0); | |||
27196 | SDValue Chain = Op.getOperand(0); | |||
27197 | SDValue Mask = Op.getOperand(2); | |||
27198 | SDValue Index = Op.getOperand(3); | |||
27199 | SDValue Base = Op.getOperand(4); | |||
27200 | SDValue Scale = Op.getOperand(5); | |||
27201 | return getPrefetchNode(Opcode, Op, DAG, Mask, Base, Index, Scale, Chain, | |||
27202 | Subtarget); | |||
27203 | } | |||
27204 | // Read Time Stamp Counter (RDTSC) and Processor ID (RDTSCP). | |||
27205 | case RDTSC: { | |||
27206 | SmallVector<SDValue, 2> Results; | |||
27207 | getReadTimeStampCounter(Op.getNode(), dl, IntrData->Opc0, DAG, Subtarget, | |||
27208 | Results); | |||
27209 | return DAG.getMergeValues(Results, dl); | |||
27210 | } | |||
27211 | // Read Performance Monitoring Counters. | |||
27212 | case RDPMC: | |||
27213 | // GetExtended Control Register. | |||
27214 | case XGETBV: { | |||
27215 | SmallVector<SDValue, 2> Results; | |||
27216 | ||||
27217 | // RDPMC uses ECX to select the index of the performance counter to read. | |||
27218 | // XGETBV uses ECX to select the index of the XCR register to return. | |||
27219 | // The result is stored into registers EDX:EAX. | |||
27220 | expandIntrinsicWChainHelper(Op.getNode(), dl, DAG, IntrData->Opc0, X86::ECX, | |||
27221 | Subtarget, Results); | |||
27222 | return DAG.getMergeValues(Results, dl); | |||
27223 | } | |||
27224 | // XTEST intrinsics. | |||
27225 | case XTEST: { | |||
27226 | SDVTList VTs = DAG.getVTList(Op->getValueType(0), MVT::Other); | |||
27227 | SDValue InTrans = DAG.getNode(IntrData->Opc0, dl, VTs, Op.getOperand(0)); | |||
27228 | ||||
27229 | SDValue SetCC = getSETCC(X86::COND_NE, InTrans, dl, DAG); | |||
27230 | SDValue Ret = DAG.getNode(ISD::ZERO_EXTEND, dl, Op->getValueType(0), SetCC); | |||
27231 | return DAG.getNode(ISD::MERGE_VALUES, dl, Op->getVTList(), | |||
27232 | Ret, SDValue(InTrans.getNode(), 1)); | |||
27233 | } | |||
27234 | case TRUNCATE_TO_MEM_VI8: | |||
27235 | case TRUNCATE_TO_MEM_VI16: | |||
27236 | case TRUNCATE_TO_MEM_VI32: { | |||
27237 | SDValue Mask = Op.getOperand(4); | |||
27238 | SDValue DataToTruncate = Op.getOperand(3); | |||
27239 | SDValue Addr = Op.getOperand(2); | |||
27240 | SDValue Chain = Op.getOperand(0); | |||
27241 | ||||
27242 | MemIntrinsicSDNode *MemIntr = dyn_cast<MemIntrinsicSDNode>(Op); | |||
27243 | assert(MemIntr && "Expected MemIntrinsicSDNode!")(static_cast <bool> (MemIntr && "Expected MemIntrinsicSDNode!" ) ? void (0) : __assert_fail ("MemIntr && \"Expected MemIntrinsicSDNode!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 27243, __extension__ __PRETTY_FUNCTION__)); | |||
27244 | ||||
27245 | EVT MemVT = MemIntr->getMemoryVT(); | |||
27246 | ||||
27247 | uint16_t TruncationOp = IntrData->Opc0; | |||
27248 | switch (TruncationOp) { | |||
27249 | case X86ISD::VTRUNC: { | |||
27250 | if (isAllOnesConstant(Mask)) // return just a truncate store | |||
27251 | return DAG.getTruncStore(Chain, dl, DataToTruncate, Addr, MemVT, | |||
27252 | MemIntr->getMemOperand()); | |||
27253 | ||||
27254 | MVT MaskVT = MVT::getVectorVT(MVT::i1, MemVT.getVectorNumElements()); | |||
27255 | SDValue VMask = getMaskNode(Mask, MaskVT, Subtarget, DAG, dl); | |||
27256 | SDValue Offset = DAG.getUNDEF(VMask.getValueType()); | |||
27257 | ||||
27258 | return DAG.getMaskedStore(Chain, dl, DataToTruncate, Addr, Offset, VMask, | |||
27259 | MemVT, MemIntr->getMemOperand(), ISD::UNINDEXED, | |||
27260 | true /* truncating */); | |||
27261 | } | |||
27262 | case X86ISD::VTRUNCUS: | |||
27263 | case X86ISD::VTRUNCS: { | |||
27264 | bool IsSigned = (TruncationOp == X86ISD::VTRUNCS); | |||
27265 | if (isAllOnesConstant(Mask)) | |||
27266 | return EmitTruncSStore(IsSigned, Chain, dl, DataToTruncate, Addr, MemVT, | |||
27267 | MemIntr->getMemOperand(), DAG); | |||
27268 | ||||
27269 | MVT MaskVT = MVT::getVectorVT(MVT::i1, MemVT.getVectorNumElements()); | |||
27270 | SDValue VMask = getMaskNode(Mask, MaskVT, Subtarget, DAG, dl); | |||
27271 | ||||
27272 | return EmitMaskedTruncSStore(IsSigned, Chain, dl, DataToTruncate, Addr, | |||
27273 | VMask, MemVT, MemIntr->getMemOperand(), DAG); | |||
27274 | } | |||
27275 | default: | |||
27276 | llvm_unreachable("Unsupported truncstore intrinsic")::llvm::llvm_unreachable_internal("Unsupported truncstore intrinsic" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 27276); | |||
27277 | } | |||
27278 | } | |||
27279 | } | |||
27280 | } | |||
27281 | ||||
27282 | SDValue X86TargetLowering::LowerRETURNADDR(SDValue Op, | |||
27283 | SelectionDAG &DAG) const { | |||
27284 | MachineFrameInfo &MFI = DAG.getMachineFunction().getFrameInfo(); | |||
27285 | MFI.setReturnAddressIsTaken(true); | |||
27286 | ||||
27287 | if (verifyReturnAddressArgumentIsConstant(Op, DAG)) | |||
27288 | return SDValue(); | |||
27289 | ||||
27290 | unsigned Depth = Op.getConstantOperandVal(0); | |||
27291 | SDLoc dl(Op); | |||
27292 | EVT PtrVT = getPointerTy(DAG.getDataLayout()); | |||
27293 | ||||
27294 | if (Depth > 0) { | |||
27295 | SDValue FrameAddr = LowerFRAMEADDR(Op, DAG); | |||
27296 | const X86RegisterInfo *RegInfo = Subtarget.getRegisterInfo(); | |||
27297 | SDValue Offset = DAG.getConstant(RegInfo->getSlotSize(), dl, PtrVT); | |||
27298 | return DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), | |||
27299 | DAG.getNode(ISD::ADD, dl, PtrVT, FrameAddr, Offset), | |||
27300 | MachinePointerInfo()); | |||
27301 | } | |||
27302 | ||||
27303 | // Just load the return address. | |||
27304 | SDValue RetAddrFI = getReturnAddressFrameIndex(DAG); | |||
27305 | return DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), RetAddrFI, | |||
27306 | MachinePointerInfo()); | |||
27307 | } | |||
27308 | ||||
27309 | SDValue X86TargetLowering::LowerADDROFRETURNADDR(SDValue Op, | |||
27310 | SelectionDAG &DAG) const { | |||
27311 | DAG.getMachineFunction().getFrameInfo().setReturnAddressIsTaken(true); | |||
27312 | return getReturnAddressFrameIndex(DAG); | |||
27313 | } | |||
27314 | ||||
27315 | SDValue X86TargetLowering::LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const { | |||
27316 | MachineFunction &MF = DAG.getMachineFunction(); | |||
27317 | MachineFrameInfo &MFI = MF.getFrameInfo(); | |||
27318 | X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>(); | |||
27319 | const X86RegisterInfo *RegInfo = Subtarget.getRegisterInfo(); | |||
27320 | EVT VT = Op.getValueType(); | |||
27321 | ||||
27322 | MFI.setFrameAddressIsTaken(true); | |||
27323 | ||||
27324 | if (MF.getTarget().getMCAsmInfo()->usesWindowsCFI()) { | |||
27325 | // Depth > 0 makes no sense on targets which use Windows unwind codes. It | |||
27326 | // is not possible to crawl up the stack without looking at the unwind codes | |||
27327 | // simultaneously. | |||
27328 | int FrameAddrIndex = FuncInfo->getFAIndex(); | |||
27329 | if (!FrameAddrIndex) { | |||
27330 | // Set up a frame object for the return address. | |||
27331 | unsigned SlotSize = RegInfo->getSlotSize(); | |||
27332 | FrameAddrIndex = MF.getFrameInfo().CreateFixedObject( | |||
27333 | SlotSize, /*SPOffset=*/0, /*IsImmutable=*/false); | |||
27334 | FuncInfo->setFAIndex(FrameAddrIndex); | |||
27335 | } | |||
27336 | return DAG.getFrameIndex(FrameAddrIndex, VT); | |||
27337 | } | |||
27338 | ||||
27339 | unsigned FrameReg = | |||
27340 | RegInfo->getPtrSizedFrameRegister(DAG.getMachineFunction()); | |||
27341 | SDLoc dl(Op); // FIXME probably not meaningful | |||
27342 | unsigned Depth = Op.getConstantOperandVal(0); | |||
27343 | assert(((FrameReg == X86::RBP && VT == MVT::i64) ||(static_cast <bool> (((FrameReg == X86::RBP && VT == MVT::i64) || (FrameReg == X86::EBP && VT == MVT:: i32)) && "Invalid Frame Register!") ? void (0) : __assert_fail ("((FrameReg == X86::RBP && VT == MVT::i64) || (FrameReg == X86::EBP && VT == MVT::i32)) && \"Invalid Frame Register!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 27345, __extension__ __PRETTY_FUNCTION__)) | |||
27344 | (FrameReg == X86::EBP && VT == MVT::i32)) &&(static_cast <bool> (((FrameReg == X86::RBP && VT == MVT::i64) || (FrameReg == X86::EBP && VT == MVT:: i32)) && "Invalid Frame Register!") ? void (0) : __assert_fail ("((FrameReg == X86::RBP && VT == MVT::i64) || (FrameReg == X86::EBP && VT == MVT::i32)) && \"Invalid Frame Register!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 27345, __extension__ __PRETTY_FUNCTION__)) | |||
27345 | "Invalid Frame Register!")(static_cast <bool> (((FrameReg == X86::RBP && VT == MVT::i64) || (FrameReg == X86::EBP && VT == MVT:: i32)) && "Invalid Frame Register!") ? void (0) : __assert_fail ("((FrameReg == X86::RBP && VT == MVT::i64) || (FrameReg == X86::EBP && VT == MVT::i32)) && \"Invalid Frame Register!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 27345, __extension__ __PRETTY_FUNCTION__)); | |||
27346 | SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, FrameReg, VT); | |||
27347 | while (Depth--) | |||
27348 | FrameAddr = DAG.getLoad(VT, dl, DAG.getEntryNode(), FrameAddr, | |||
27349 | MachinePointerInfo()); | |||
27350 | return FrameAddr; | |||
27351 | } | |||
27352 | ||||
27353 | // FIXME? Maybe this could be a TableGen attribute on some registers and | |||
27354 | // this table could be generated automatically from RegInfo. | |||
27355 | Register X86TargetLowering::getRegisterByName(const char* RegName, LLT VT, | |||
27356 | const MachineFunction &MF) const { | |||
27357 | const TargetFrameLowering &TFI = *Subtarget.getFrameLowering(); | |||
27358 | ||||
27359 | Register Reg = StringSwitch<unsigned>(RegName) | |||
27360 | .Case("esp", X86::ESP) | |||
27361 | .Case("rsp", X86::RSP) | |||
27362 | .Case("ebp", X86::EBP) | |||
27363 | .Case("rbp", X86::RBP) | |||
27364 | .Default(0); | |||
27365 | ||||
27366 | if (Reg == X86::EBP || Reg == X86::RBP) { | |||
27367 | if (!TFI.hasFP(MF)) | |||
27368 | report_fatal_error("register " + StringRef(RegName) + | |||
27369 | " is allocatable: function has no frame pointer"); | |||
27370 | #ifndef NDEBUG | |||
27371 | else { | |||
27372 | const X86RegisterInfo *RegInfo = Subtarget.getRegisterInfo(); | |||
27373 | Register FrameReg = RegInfo->getPtrSizedFrameRegister(MF); | |||
27374 | assert((FrameReg == X86::EBP || FrameReg == X86::RBP) &&(static_cast <bool> ((FrameReg == X86::EBP || FrameReg == X86::RBP) && "Invalid Frame Register!") ? void (0) : __assert_fail ("(FrameReg == X86::EBP || FrameReg == X86::RBP) && \"Invalid Frame Register!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 27375, __extension__ __PRETTY_FUNCTION__)) | |||
27375 | "Invalid Frame Register!")(static_cast <bool> ((FrameReg == X86::EBP || FrameReg == X86::RBP) && "Invalid Frame Register!") ? void (0) : __assert_fail ("(FrameReg == X86::EBP || FrameReg == X86::RBP) && \"Invalid Frame Register!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 27375, __extension__ __PRETTY_FUNCTION__)); | |||
27376 | } | |||
27377 | #endif | |||
27378 | } | |||
27379 | ||||
27380 | if (Reg) | |||
27381 | return Reg; | |||
27382 | ||||
27383 | report_fatal_error("Invalid register name global variable"); | |||
27384 | } | |||
27385 | ||||
27386 | SDValue X86TargetLowering::LowerFRAME_TO_ARGS_OFFSET(SDValue Op, | |||
27387 | SelectionDAG &DAG) const { | |||
27388 | const X86RegisterInfo *RegInfo = Subtarget.getRegisterInfo(); | |||
27389 | return DAG.getIntPtrConstant(2 * RegInfo->getSlotSize(), SDLoc(Op)); | |||
27390 | } | |||
27391 | ||||
27392 | Register X86TargetLowering::getExceptionPointerRegister( | |||
27393 | const Constant *PersonalityFn) const { | |||
27394 | if (classifyEHPersonality(PersonalityFn) == EHPersonality::CoreCLR) | |||
27395 | return Subtarget.isTarget64BitLP64() ? X86::RDX : X86::EDX; | |||
27396 | ||||
27397 | return Subtarget.isTarget64BitLP64() ? X86::RAX : X86::EAX; | |||
27398 | } | |||
27399 | ||||
27400 | Register X86TargetLowering::getExceptionSelectorRegister( | |||
27401 | const Constant *PersonalityFn) const { | |||
27402 | // Funclet personalities don't use selectors (the runtime does the selection). | |||
27403 | if (isFuncletEHPersonality(classifyEHPersonality(PersonalityFn))) | |||
27404 | return X86::NoRegister; | |||
27405 | return Subtarget.isTarget64BitLP64() ? X86::RDX : X86::EDX; | |||
27406 | } | |||
27407 | ||||
27408 | bool X86TargetLowering::needsFixedCatchObjects() const { | |||
27409 | return Subtarget.isTargetWin64(); | |||
27410 | } | |||
27411 | ||||
27412 | SDValue X86TargetLowering::LowerEH_RETURN(SDValue Op, SelectionDAG &DAG) const { | |||
27413 | SDValue Chain = Op.getOperand(0); | |||
27414 | SDValue Offset = Op.getOperand(1); | |||
27415 | SDValue Handler = Op.getOperand(2); | |||
27416 | SDLoc dl (Op); | |||
27417 | ||||
27418 | EVT PtrVT = getPointerTy(DAG.getDataLayout()); | |||
27419 | const X86RegisterInfo *RegInfo = Subtarget.getRegisterInfo(); | |||
27420 | Register FrameReg = RegInfo->getFrameRegister(DAG.getMachineFunction()); | |||
27421 | assert(((FrameReg == X86::RBP && PtrVT == MVT::i64) ||(static_cast <bool> (((FrameReg == X86::RBP && PtrVT == MVT::i64) || (FrameReg == X86::EBP && PtrVT == MVT ::i32)) && "Invalid Frame Register!") ? void (0) : __assert_fail ("((FrameReg == X86::RBP && PtrVT == MVT::i64) || (FrameReg == X86::EBP && PtrVT == MVT::i32)) && \"Invalid Frame Register!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 27423, __extension__ __PRETTY_FUNCTION__)) | |||
27422 | (FrameReg == X86::EBP && PtrVT == MVT::i32)) &&(static_cast <bool> (((FrameReg == X86::RBP && PtrVT == MVT::i64) || (FrameReg == X86::EBP && PtrVT == MVT ::i32)) && "Invalid Frame Register!") ? void (0) : __assert_fail ("((FrameReg == X86::RBP && PtrVT == MVT::i64) || (FrameReg == X86::EBP && PtrVT == MVT::i32)) && \"Invalid Frame Register!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 27423, __extension__ __PRETTY_FUNCTION__)) | |||
27423 | "Invalid Frame Register!")(static_cast <bool> (((FrameReg == X86::RBP && PtrVT == MVT::i64) || (FrameReg == X86::EBP && PtrVT == MVT ::i32)) && "Invalid Frame Register!") ? void (0) : __assert_fail ("((FrameReg == X86::RBP && PtrVT == MVT::i64) || (FrameReg == X86::EBP && PtrVT == MVT::i32)) && \"Invalid Frame Register!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 27423, __extension__ __PRETTY_FUNCTION__)); | |||
27424 | SDValue Frame = DAG.getCopyFromReg(DAG.getEntryNode(), dl, FrameReg, PtrVT); | |||
27425 | Register StoreAddrReg = (PtrVT == MVT::i64) ? X86::RCX : X86::ECX; | |||
27426 | ||||
27427 | SDValue StoreAddr = DAG.getNode(ISD::ADD, dl, PtrVT, Frame, | |||
27428 | DAG.getIntPtrConstant(RegInfo->getSlotSize(), | |||
27429 | dl)); | |||
27430 | StoreAddr = DAG.getNode(ISD::ADD, dl, PtrVT, StoreAddr, Offset); | |||
27431 | Chain = DAG.getStore(Chain, dl, Handler, StoreAddr, MachinePointerInfo()); | |||
27432 | Chain = DAG.getCopyToReg(Chain, dl, StoreAddrReg, StoreAddr); | |||
27433 | ||||
27434 | return DAG.getNode(X86ISD::EH_RETURN, dl, MVT::Other, Chain, | |||
27435 | DAG.getRegister(StoreAddrReg, PtrVT)); | |||
27436 | } | |||
27437 | ||||
27438 | SDValue X86TargetLowering::lowerEH_SJLJ_SETJMP(SDValue Op, | |||
27439 | SelectionDAG &DAG) const { | |||
27440 | SDLoc DL(Op); | |||
27441 | // If the subtarget is not 64bit, we may need the global base reg | |||
27442 | // after isel expand pseudo, i.e., after CGBR pass ran. | |||
27443 | // Therefore, ask for the GlobalBaseReg now, so that the pass | |||
27444 | // inserts the code for us in case we need it. | |||
27445 | // Otherwise, we will end up in a situation where we will | |||
27446 | // reference a virtual register that is not defined! | |||
27447 | if (!Subtarget.is64Bit()) { | |||
27448 | const X86InstrInfo *TII = Subtarget.getInstrInfo(); | |||
27449 | (void)TII->getGlobalBaseReg(&DAG.getMachineFunction()); | |||
27450 | } | |||
27451 | return DAG.getNode(X86ISD::EH_SJLJ_SETJMP, DL, | |||
27452 | DAG.getVTList(MVT::i32, MVT::Other), | |||
27453 | Op.getOperand(0), Op.getOperand(1)); | |||
27454 | } | |||
27455 | ||||
27456 | SDValue X86TargetLowering::lowerEH_SJLJ_LONGJMP(SDValue Op, | |||
27457 | SelectionDAG &DAG) const { | |||
27458 | SDLoc DL(Op); | |||
27459 | return DAG.getNode(X86ISD::EH_SJLJ_LONGJMP, DL, MVT::Other, | |||
27460 | Op.getOperand(0), Op.getOperand(1)); | |||
27461 | } | |||
27462 | ||||
27463 | SDValue X86TargetLowering::lowerEH_SJLJ_SETUP_DISPATCH(SDValue Op, | |||
27464 | SelectionDAG &DAG) const { | |||
27465 | SDLoc DL(Op); | |||
27466 | return DAG.getNode(X86ISD::EH_SJLJ_SETUP_DISPATCH, DL, MVT::Other, | |||
27467 | Op.getOperand(0)); | |||
27468 | } | |||
27469 | ||||
27470 | static SDValue LowerADJUST_TRAMPOLINE(SDValue Op, SelectionDAG &DAG) { | |||
27471 | return Op.getOperand(0); | |||
27472 | } | |||
27473 | ||||
27474 | SDValue X86TargetLowering::LowerINIT_TRAMPOLINE(SDValue Op, | |||
27475 | SelectionDAG &DAG) const { | |||
27476 | SDValue Root = Op.getOperand(0); | |||
27477 | SDValue Trmp = Op.getOperand(1); // trampoline | |||
27478 | SDValue FPtr = Op.getOperand(2); // nested function | |||
27479 | SDValue Nest = Op.getOperand(3); // 'nest' parameter value | |||
27480 | SDLoc dl (Op); | |||
27481 | ||||
27482 | const Value *TrmpAddr = cast<SrcValueSDNode>(Op.getOperand(4))->getValue(); | |||
27483 | const TargetRegisterInfo *TRI = Subtarget.getRegisterInfo(); | |||
27484 | ||||
27485 | if (Subtarget.is64Bit()) { | |||
27486 | SDValue OutChains[6]; | |||
27487 | ||||
27488 | // Large code-model. | |||
27489 | const unsigned char JMP64r = 0xFF; // 64-bit jmp through register opcode. | |||
27490 | const unsigned char MOV64ri = 0xB8; // X86::MOV64ri opcode. | |||
27491 | ||||
27492 | const unsigned char N86R10 = TRI->getEncodingValue(X86::R10) & 0x7; | |||
27493 | const unsigned char N86R11 = TRI->getEncodingValue(X86::R11) & 0x7; | |||
27494 | ||||
27495 | const unsigned char REX_WB = 0x40 | 0x08 | 0x01; // REX prefix | |||
27496 | ||||
27497 | // Load the pointer to the nested function into R11. | |||
27498 | unsigned OpCode = ((MOV64ri | N86R11) << 8) | REX_WB; // movabsq r11 | |||
27499 | SDValue Addr = Trmp; | |||
27500 | OutChains[0] = DAG.getStore(Root, dl, DAG.getConstant(OpCode, dl, MVT::i16), | |||
27501 | Addr, MachinePointerInfo(TrmpAddr)); | |||
27502 | ||||
27503 | Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp, | |||
27504 | DAG.getConstant(2, dl, MVT::i64)); | |||
27505 | OutChains[1] = DAG.getStore(Root, dl, FPtr, Addr, | |||
27506 | MachinePointerInfo(TrmpAddr, 2), Align(2)); | |||
27507 | ||||
27508 | // Load the 'nest' parameter value into R10. | |||
27509 | // R10 is specified in X86CallingConv.td | |||
27510 | OpCode = ((MOV64ri | N86R10) << 8) | REX_WB; // movabsq r10 | |||
27511 | Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp, | |||
27512 | DAG.getConstant(10, dl, MVT::i64)); | |||
27513 | OutChains[2] = DAG.getStore(Root, dl, DAG.getConstant(OpCode, dl, MVT::i16), | |||
27514 | Addr, MachinePointerInfo(TrmpAddr, 10)); | |||
27515 | ||||
27516 | Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp, | |||
27517 | DAG.getConstant(12, dl, MVT::i64)); | |||
27518 | OutChains[3] = DAG.getStore(Root, dl, Nest, Addr, | |||
27519 | MachinePointerInfo(TrmpAddr, 12), Align(2)); | |||
27520 | ||||
27521 | // Jump to the nested function. | |||
27522 | OpCode = (JMP64r << 8) | REX_WB; // jmpq *... | |||
27523 | Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp, | |||
27524 | DAG.getConstant(20, dl, MVT::i64)); | |||
27525 | OutChains[4] = DAG.getStore(Root, dl, DAG.getConstant(OpCode, dl, MVT::i16), | |||
27526 | Addr, MachinePointerInfo(TrmpAddr, 20)); | |||
27527 | ||||
27528 | unsigned char ModRM = N86R11 | (4 << 3) | (3 << 6); // ...r11 | |||
27529 | Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp, | |||
27530 | DAG.getConstant(22, dl, MVT::i64)); | |||
27531 | OutChains[5] = DAG.getStore(Root, dl, DAG.getConstant(ModRM, dl, MVT::i8), | |||
27532 | Addr, MachinePointerInfo(TrmpAddr, 22)); | |||
27533 | ||||
27534 | return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, OutChains); | |||
27535 | } else { | |||
27536 | const Function *Func = | |||
27537 | cast<Function>(cast<SrcValueSDNode>(Op.getOperand(5))->getValue()); | |||
27538 | CallingConv::ID CC = Func->getCallingConv(); | |||
27539 | unsigned NestReg; | |||
27540 | ||||
27541 | switch (CC) { | |||
27542 | default: | |||
27543 | llvm_unreachable("Unsupported calling convention")::llvm::llvm_unreachable_internal("Unsupported calling convention" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 27543); | |||
27544 | case CallingConv::C: | |||
27545 | case CallingConv::X86_StdCall: { | |||
27546 | // Pass 'nest' parameter in ECX. | |||
27547 | // Must be kept in sync with X86CallingConv.td | |||
27548 | NestReg = X86::ECX; | |||
27549 | ||||
27550 | // Check that ECX wasn't needed by an 'inreg' parameter. | |||
27551 | FunctionType *FTy = Func->getFunctionType(); | |||
27552 | const AttributeList &Attrs = Func->getAttributes(); | |||
27553 | ||||
27554 | if (!Attrs.isEmpty() && !Func->isVarArg()) { | |||
27555 | unsigned InRegCount = 0; | |||
27556 | unsigned Idx = 0; | |||
27557 | ||||
27558 | for (FunctionType::param_iterator I = FTy->param_begin(), | |||
27559 | E = FTy->param_end(); I != E; ++I, ++Idx) | |||
27560 | if (Attrs.hasParamAttr(Idx, Attribute::InReg)) { | |||
27561 | const DataLayout &DL = DAG.getDataLayout(); | |||
27562 | // FIXME: should only count parameters that are lowered to integers. | |||
27563 | InRegCount += (DL.getTypeSizeInBits(*I) + 31) / 32; | |||
27564 | } | |||
27565 | ||||
27566 | if (InRegCount > 2) { | |||
27567 | report_fatal_error("Nest register in use - reduce number of inreg" | |||
27568 | " parameters!"); | |||
27569 | } | |||
27570 | } | |||
27571 | break; | |||
27572 | } | |||
27573 | case CallingConv::X86_FastCall: | |||
27574 | case CallingConv::X86_ThisCall: | |||
27575 | case CallingConv::Fast: | |||
27576 | case CallingConv::Tail: | |||
27577 | case CallingConv::SwiftTail: | |||
27578 | // Pass 'nest' parameter in EAX. | |||
27579 | // Must be kept in sync with X86CallingConv.td | |||
27580 | NestReg = X86::EAX; | |||
27581 | break; | |||
27582 | } | |||
27583 | ||||
27584 | SDValue OutChains[4]; | |||
27585 | SDValue Addr, Disp; | |||
27586 | ||||
27587 | Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp, | |||
27588 | DAG.getConstant(10, dl, MVT::i32)); | |||
27589 | Disp = DAG.getNode(ISD::SUB, dl, MVT::i32, FPtr, Addr); | |||
27590 | ||||
27591 | // This is storing the opcode for MOV32ri. | |||
27592 | const unsigned char MOV32ri = 0xB8; // X86::MOV32ri's opcode byte. | |||
27593 | const unsigned char N86Reg = TRI->getEncodingValue(NestReg) & 0x7; | |||
27594 | OutChains[0] = | |||
27595 | DAG.getStore(Root, dl, DAG.getConstant(MOV32ri | N86Reg, dl, MVT::i8), | |||
27596 | Trmp, MachinePointerInfo(TrmpAddr)); | |||
27597 | ||||
27598 | Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp, | |||
27599 | DAG.getConstant(1, dl, MVT::i32)); | |||
27600 | OutChains[1] = DAG.getStore(Root, dl, Nest, Addr, | |||
27601 | MachinePointerInfo(TrmpAddr, 1), Align(1)); | |||
27602 | ||||
27603 | const unsigned char JMP = 0xE9; // jmp <32bit dst> opcode. | |||
27604 | Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp, | |||
27605 | DAG.getConstant(5, dl, MVT::i32)); | |||
27606 | OutChains[2] = | |||
27607 | DAG.getStore(Root, dl, DAG.getConstant(JMP, dl, MVT::i8), Addr, | |||
27608 | MachinePointerInfo(TrmpAddr, 5), Align(1)); | |||
27609 | ||||
27610 | Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp, | |||
27611 | DAG.getConstant(6, dl, MVT::i32)); | |||
27612 | OutChains[3] = DAG.getStore(Root, dl, Disp, Addr, | |||
27613 | MachinePointerInfo(TrmpAddr, 6), Align(1)); | |||
27614 | ||||
27615 | return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, OutChains); | |||
27616 | } | |||
27617 | } | |||
27618 | ||||
27619 | SDValue X86TargetLowering::LowerFLT_ROUNDS_(SDValue Op, | |||
27620 | SelectionDAG &DAG) const { | |||
27621 | /* | |||
27622 | The rounding mode is in bits 11:10 of FPSR, and has the following | |||
27623 | settings: | |||
27624 | 00 Round to nearest | |||
27625 | 01 Round to -inf | |||
27626 | 10 Round to +inf | |||
27627 | 11 Round to 0 | |||
27628 | ||||
27629 | FLT_ROUNDS, on the other hand, expects the following: | |||
27630 | -1 Undefined | |||
27631 | 0 Round to 0 | |||
27632 | 1 Round to nearest | |||
27633 | 2 Round to +inf | |||
27634 | 3 Round to -inf | |||
27635 | ||||
27636 | To perform the conversion, we use a packed lookup table of the four 2-bit | |||
27637 | values that we can index by FPSP[11:10] | |||
27638 | 0x2d --> (0b00,10,11,01) --> (0,2,3,1) >> FPSR[11:10] | |||
27639 | ||||
27640 | (0x2d >> ((FPSR & 0xc00) >> 9)) & 3 | |||
27641 | */ | |||
27642 | ||||
27643 | MachineFunction &MF = DAG.getMachineFunction(); | |||
27644 | MVT VT = Op.getSimpleValueType(); | |||
27645 | SDLoc DL(Op); | |||
27646 | ||||
27647 | // Save FP Control Word to stack slot | |||
27648 | int SSFI = MF.getFrameInfo().CreateStackObject(2, Align(2), false); | |||
27649 | SDValue StackSlot = | |||
27650 | DAG.getFrameIndex(SSFI, getPointerTy(DAG.getDataLayout())); | |||
27651 | ||||
27652 | MachinePointerInfo MPI = MachinePointerInfo::getFixedStack(MF, SSFI); | |||
27653 | ||||
27654 | SDValue Chain = Op.getOperand(0); | |||
27655 | SDValue Ops[] = {Chain, StackSlot}; | |||
27656 | Chain = DAG.getMemIntrinsicNode(X86ISD::FNSTCW16m, DL, | |||
27657 | DAG.getVTList(MVT::Other), Ops, MVT::i16, MPI, | |||
27658 | Align(2), MachineMemOperand::MOStore); | |||
27659 | ||||
27660 | // Load FP Control Word from stack slot | |||
27661 | SDValue CWD = DAG.getLoad(MVT::i16, DL, Chain, StackSlot, MPI, Align(2)); | |||
27662 | Chain = CWD.getValue(1); | |||
27663 | ||||
27664 | // Mask and turn the control bits into a shift for the lookup table. | |||
27665 | SDValue Shift = | |||
27666 | DAG.getNode(ISD::SRL, DL, MVT::i16, | |||
27667 | DAG.getNode(ISD::AND, DL, MVT::i16, | |||
27668 | CWD, DAG.getConstant(0xc00, DL, MVT::i16)), | |||
27669 | DAG.getConstant(9, DL, MVT::i8)); | |||
27670 | Shift = DAG.getNode(ISD::TRUNCATE, DL, MVT::i8, Shift); | |||
27671 | ||||
27672 | SDValue LUT = DAG.getConstant(0x2d, DL, MVT::i32); | |||
27673 | SDValue RetVal = | |||
27674 | DAG.getNode(ISD::AND, DL, MVT::i32, | |||
27675 | DAG.getNode(ISD::SRL, DL, MVT::i32, LUT, Shift), | |||
27676 | DAG.getConstant(3, DL, MVT::i32)); | |||
27677 | ||||
27678 | RetVal = DAG.getZExtOrTrunc(RetVal, DL, VT); | |||
27679 | ||||
27680 | return DAG.getMergeValues({RetVal, Chain}, DL); | |||
27681 | } | |||
27682 | ||||
27683 | SDValue X86TargetLowering::LowerSET_ROUNDING(SDValue Op, | |||
27684 | SelectionDAG &DAG) const { | |||
27685 | MachineFunction &MF = DAG.getMachineFunction(); | |||
27686 | SDLoc DL(Op); | |||
27687 | SDValue Chain = Op.getNode()->getOperand(0); | |||
27688 | ||||
27689 | // FP control word may be set only from data in memory. So we need to allocate | |||
27690 | // stack space to save/load FP control word. | |||
27691 | int OldCWFrameIdx = MF.getFrameInfo().CreateStackObject(4, Align(4), false); | |||
27692 | SDValue StackSlot = | |||
27693 | DAG.getFrameIndex(OldCWFrameIdx, getPointerTy(DAG.getDataLayout())); | |||
27694 | MachinePointerInfo MPI = MachinePointerInfo::getFixedStack(MF, OldCWFrameIdx); | |||
27695 | MachineMemOperand *MMO = | |||
27696 | MF.getMachineMemOperand(MPI, MachineMemOperand::MOStore, 2, Align(2)); | |||
27697 | ||||
27698 | // Store FP control word into memory. | |||
27699 | SDValue Ops[] = {Chain, StackSlot}; | |||
27700 | Chain = DAG.getMemIntrinsicNode( | |||
27701 | X86ISD::FNSTCW16m, DL, DAG.getVTList(MVT::Other), Ops, MVT::i16, MMO); | |||
27702 | ||||
27703 | // Load FP Control Word from stack slot and clear RM field (bits 11:10). | |||
27704 | SDValue CWD = DAG.getLoad(MVT::i16, DL, Chain, StackSlot, MPI); | |||
27705 | Chain = CWD.getValue(1); | |||
27706 | CWD = DAG.getNode(ISD::AND, DL, MVT::i16, CWD.getValue(0), | |||
27707 | DAG.getConstant(0xf3ff, DL, MVT::i16)); | |||
27708 | ||||
27709 | // Calculate new rounding mode. | |||
27710 | SDValue NewRM = Op.getNode()->getOperand(1); | |||
27711 | SDValue RMBits; | |||
27712 | if (auto *CVal = dyn_cast<ConstantSDNode>(NewRM)) { | |||
27713 | uint64_t RM = CVal->getZExtValue(); | |||
27714 | int FieldVal; | |||
27715 | switch (static_cast<RoundingMode>(RM)) { | |||
27716 | case RoundingMode::NearestTiesToEven: FieldVal = X86::rmToNearest; break; | |||
27717 | case RoundingMode::TowardNegative: FieldVal = X86::rmDownward; break; | |||
27718 | case RoundingMode::TowardPositive: FieldVal = X86::rmUpward; break; | |||
27719 | case RoundingMode::TowardZero: FieldVal = X86::rmTowardZero; break; | |||
27720 | default: | |||
27721 | llvm_unreachable("rounding mode is not supported by X86 hardware")::llvm::llvm_unreachable_internal("rounding mode is not supported by X86 hardware" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 27721); | |||
27722 | } | |||
27723 | RMBits = DAG.getConstant(FieldVal, DL, MVT::i16); | |||
27724 | } else { | |||
27725 | // Need to convert argument into bits of control word: | |||
27726 | // 0 Round to 0 -> 11 | |||
27727 | // 1 Round to nearest -> 00 | |||
27728 | // 2 Round to +inf -> 10 | |||
27729 | // 3 Round to -inf -> 01 | |||
27730 | // The 2-bit value needs then to be shifted so that it occupies bits 11:10. | |||
27731 | // To make the conversion, put all these values into a value 0xc9 and shift | |||
27732 | // it left depending on the rounding mode: | |||
27733 | // (0xc9 << 4) & 0xc00 = X86::rmTowardZero | |||
27734 | // (0xc9 << 6) & 0xc00 = X86::rmToNearest | |||
27735 | // ... | |||
27736 | // (0xc9 << (2 * NewRM + 4)) & 0xc00 | |||
27737 | SDValue ShiftValue = | |||
27738 | DAG.getNode(ISD::TRUNCATE, DL, MVT::i8, | |||
27739 | DAG.getNode(ISD::ADD, DL, MVT::i32, | |||
27740 | DAG.getNode(ISD::SHL, DL, MVT::i32, NewRM, | |||
27741 | DAG.getConstant(1, DL, MVT::i8)), | |||
27742 | DAG.getConstant(4, DL, MVT::i32))); | |||
27743 | SDValue Shifted = | |||
27744 | DAG.getNode(ISD::SHL, DL, MVT::i16, DAG.getConstant(0xc9, DL, MVT::i16), | |||
27745 | ShiftValue); | |||
27746 | RMBits = DAG.getNode(ISD::AND, DL, MVT::i16, Shifted, | |||
27747 | DAG.getConstant(0xc00, DL, MVT::i16)); | |||
27748 | } | |||
27749 | ||||
27750 | // Update rounding mode bits and store the new FP Control Word into stack. | |||
27751 | CWD = DAG.getNode(ISD::OR, DL, MVT::i16, CWD, RMBits); | |||
27752 | Chain = DAG.getStore(Chain, DL, CWD, StackSlot, MPI, /* Alignment = */ 2); | |||
27753 | ||||
27754 | // Load FP control word from the slot. | |||
27755 | SDValue OpsLD[] = {Chain, StackSlot}; | |||
27756 | MachineMemOperand *MMOL = | |||
27757 | MF.getMachineMemOperand(MPI, MachineMemOperand::MOLoad, 2, Align(2)); | |||
27758 | Chain = DAG.getMemIntrinsicNode( | |||
27759 | X86ISD::FLDCW16m, DL, DAG.getVTList(MVT::Other), OpsLD, MVT::i16, MMOL); | |||
27760 | ||||
27761 | // If target supports SSE, set MXCSR as well. Rounding mode is encoded in the | |||
27762 | // same way but in bits 14:13. | |||
27763 | if (Subtarget.hasSSE1()) { | |||
27764 | // Store MXCSR into memory. | |||
27765 | Chain = DAG.getNode( | |||
27766 | ISD::INTRINSIC_VOID, DL, DAG.getVTList(MVT::Other), Chain, | |||
27767 | DAG.getTargetConstant(Intrinsic::x86_sse_stmxcsr, DL, MVT::i32), | |||
27768 | StackSlot); | |||
27769 | ||||
27770 | // Load MXCSR from stack slot and clear RM field (bits 14:13). | |||
27771 | SDValue CWD = DAG.getLoad(MVT::i32, DL, Chain, StackSlot, MPI); | |||
27772 | Chain = CWD.getValue(1); | |||
27773 | CWD = DAG.getNode(ISD::AND, DL, MVT::i32, CWD.getValue(0), | |||
27774 | DAG.getConstant(0xffff9fff, DL, MVT::i32)); | |||
27775 | ||||
27776 | // Shift X87 RM bits from 11:10 to 14:13. | |||
27777 | RMBits = DAG.getNode(ISD::ZERO_EXTEND, DL, MVT::i32, RMBits); | |||
27778 | RMBits = DAG.getNode(ISD::SHL, DL, MVT::i32, RMBits, | |||
27779 | DAG.getConstant(3, DL, MVT::i8)); | |||
27780 | ||||
27781 | // Update rounding mode bits and store the new FP Control Word into stack. | |||
27782 | CWD = DAG.getNode(ISD::OR, DL, MVT::i32, CWD, RMBits); | |||
27783 | Chain = DAG.getStore(Chain, DL, CWD, StackSlot, MPI, /* Alignment = */ 4); | |||
27784 | ||||
27785 | // Load MXCSR from the slot. | |||
27786 | Chain = DAG.getNode( | |||
27787 | ISD::INTRINSIC_VOID, DL, DAG.getVTList(MVT::Other), Chain, | |||
27788 | DAG.getTargetConstant(Intrinsic::x86_sse_ldmxcsr, DL, MVT::i32), | |||
27789 | StackSlot); | |||
27790 | } | |||
27791 | ||||
27792 | return Chain; | |||
27793 | } | |||
27794 | ||||
27795 | /// Lower a vector CTLZ using native supported vector CTLZ instruction. | |||
27796 | // | |||
27797 | // i8/i16 vector implemented using dword LZCNT vector instruction | |||
27798 | // ( sub(trunc(lzcnt(zext32(x)))) ). In case zext32(x) is illegal, | |||
27799 | // split the vector, perform operation on it's Lo a Hi part and | |||
27800 | // concatenate the results. | |||
27801 | static SDValue LowerVectorCTLZ_AVX512CDI(SDValue Op, SelectionDAG &DAG, | |||
27802 | const X86Subtarget &Subtarget) { | |||
27803 | assert(Op.getOpcode() == ISD::CTLZ)(static_cast <bool> (Op.getOpcode() == ISD::CTLZ) ? void (0) : __assert_fail ("Op.getOpcode() == ISD::CTLZ", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 27803, __extension__ __PRETTY_FUNCTION__)); | |||
27804 | SDLoc dl(Op); | |||
27805 | MVT VT = Op.getSimpleValueType(); | |||
27806 | MVT EltVT = VT.getVectorElementType(); | |||
27807 | unsigned NumElems = VT.getVectorNumElements(); | |||
27808 | ||||
27809 | assert((EltVT == MVT::i8 || EltVT == MVT::i16) &&(static_cast <bool> ((EltVT == MVT::i8 || EltVT == MVT:: i16) && "Unsupported element type") ? void (0) : __assert_fail ("(EltVT == MVT::i8 || EltVT == MVT::i16) && \"Unsupported element type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 27810, __extension__ __PRETTY_FUNCTION__)) | |||
27810 | "Unsupported element type")(static_cast <bool> ((EltVT == MVT::i8 || EltVT == MVT:: i16) && "Unsupported element type") ? void (0) : __assert_fail ("(EltVT == MVT::i8 || EltVT == MVT::i16) && \"Unsupported element type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 27810, __extension__ __PRETTY_FUNCTION__)); | |||
27811 | ||||
27812 | // Split vector, it's Lo and Hi parts will be handled in next iteration. | |||
27813 | if (NumElems > 16 || | |||
27814 | (NumElems == 16 && !Subtarget.canExtendTo512DQ())) | |||
27815 | return splitVectorIntUnary(Op, DAG); | |||
27816 | ||||
27817 | MVT NewVT = MVT::getVectorVT(MVT::i32, NumElems); | |||
27818 | assert((NewVT.is256BitVector() || NewVT.is512BitVector()) &&(static_cast <bool> ((NewVT.is256BitVector() || NewVT.is512BitVector ()) && "Unsupported value type for operation") ? void (0) : __assert_fail ("(NewVT.is256BitVector() || NewVT.is512BitVector()) && \"Unsupported value type for operation\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 27819, __extension__ __PRETTY_FUNCTION__)) | |||
27819 | "Unsupported value type for operation")(static_cast <bool> ((NewVT.is256BitVector() || NewVT.is512BitVector ()) && "Unsupported value type for operation") ? void (0) : __assert_fail ("(NewVT.is256BitVector() || NewVT.is512BitVector()) && \"Unsupported value type for operation\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 27819, __extension__ __PRETTY_FUNCTION__)); | |||
27820 | ||||
27821 | // Use native supported vector instruction vplzcntd. | |||
27822 | Op = DAG.getNode(ISD::ZERO_EXTEND, dl, NewVT, Op.getOperand(0)); | |||
27823 | SDValue CtlzNode = DAG.getNode(ISD::CTLZ, dl, NewVT, Op); | |||
27824 | SDValue TruncNode = DAG.getNode(ISD::TRUNCATE, dl, VT, CtlzNode); | |||
27825 | SDValue Delta = DAG.getConstant(32 - EltVT.getSizeInBits(), dl, VT); | |||
27826 | ||||
27827 | return DAG.getNode(ISD::SUB, dl, VT, TruncNode, Delta); | |||
27828 | } | |||
27829 | ||||
27830 | // Lower CTLZ using a PSHUFB lookup table implementation. | |||
27831 | static SDValue LowerVectorCTLZInRegLUT(SDValue Op, const SDLoc &DL, | |||
27832 | const X86Subtarget &Subtarget, | |||
27833 | SelectionDAG &DAG) { | |||
27834 | MVT VT = Op.getSimpleValueType(); | |||
27835 | int NumElts = VT.getVectorNumElements(); | |||
27836 | int NumBytes = NumElts * (VT.getScalarSizeInBits() / 8); | |||
27837 | MVT CurrVT = MVT::getVectorVT(MVT::i8, NumBytes); | |||
27838 | ||||
27839 | // Per-nibble leading zero PSHUFB lookup table. | |||
27840 | const int LUT[16] = {/* 0 */ 4, /* 1 */ 3, /* 2 */ 2, /* 3 */ 2, | |||
27841 | /* 4 */ 1, /* 5 */ 1, /* 6 */ 1, /* 7 */ 1, | |||
27842 | /* 8 */ 0, /* 9 */ 0, /* a */ 0, /* b */ 0, | |||
27843 | /* c */ 0, /* d */ 0, /* e */ 0, /* f */ 0}; | |||
27844 | ||||
27845 | SmallVector<SDValue, 64> LUTVec; | |||
27846 | for (int i = 0; i < NumBytes; ++i) | |||
27847 | LUTVec.push_back(DAG.getConstant(LUT[i % 16], DL, MVT::i8)); | |||
27848 | SDValue InRegLUT = DAG.getBuildVector(CurrVT, DL, LUTVec); | |||
27849 | ||||
27850 | // Begin by bitcasting the input to byte vector, then split those bytes | |||
27851 | // into lo/hi nibbles and use the PSHUFB LUT to perform CLTZ on each of them. | |||
27852 | // If the hi input nibble is zero then we add both results together, otherwise | |||
27853 | // we just take the hi result (by masking the lo result to zero before the | |||
27854 | // add). | |||
27855 | SDValue Op0 = DAG.getBitcast(CurrVT, Op.getOperand(0)); | |||
27856 | SDValue Zero = DAG.getConstant(0, DL, CurrVT); | |||
27857 | ||||
27858 | SDValue NibbleShift = DAG.getConstant(0x4, DL, CurrVT); | |||
27859 | SDValue Lo = Op0; | |||
27860 | SDValue Hi = DAG.getNode(ISD::SRL, DL, CurrVT, Op0, NibbleShift); | |||
27861 | SDValue HiZ; | |||
27862 | if (CurrVT.is512BitVector()) { | |||
27863 | MVT MaskVT = MVT::getVectorVT(MVT::i1, CurrVT.getVectorNumElements()); | |||
27864 | HiZ = DAG.getSetCC(DL, MaskVT, Hi, Zero, ISD::SETEQ); | |||
27865 | HiZ = DAG.getNode(ISD::SIGN_EXTEND, DL, CurrVT, HiZ); | |||
27866 | } else { | |||
27867 | HiZ = DAG.getSetCC(DL, CurrVT, Hi, Zero, ISD::SETEQ); | |||
27868 | } | |||
27869 | ||||
27870 | Lo = DAG.getNode(X86ISD::PSHUFB, DL, CurrVT, InRegLUT, Lo); | |||
27871 | Hi = DAG.getNode(X86ISD::PSHUFB, DL, CurrVT, InRegLUT, Hi); | |||
27872 | Lo = DAG.getNode(ISD::AND, DL, CurrVT, Lo, HiZ); | |||
27873 | SDValue Res = DAG.getNode(ISD::ADD, DL, CurrVT, Lo, Hi); | |||
27874 | ||||
27875 | // Merge result back from vXi8 back to VT, working on the lo/hi halves | |||
27876 | // of the current vector width in the same way we did for the nibbles. | |||
27877 | // If the upper half of the input element is zero then add the halves' | |||
27878 | // leading zero counts together, otherwise just use the upper half's. | |||
27879 | // Double the width of the result until we are at target width. | |||
27880 | while (CurrVT != VT) { | |||
27881 | int CurrScalarSizeInBits = CurrVT.getScalarSizeInBits(); | |||
27882 | int CurrNumElts = CurrVT.getVectorNumElements(); | |||
27883 | MVT NextSVT = MVT::getIntegerVT(CurrScalarSizeInBits * 2); | |||
27884 | MVT NextVT = MVT::getVectorVT(NextSVT, CurrNumElts / 2); | |||
27885 | SDValue Shift = DAG.getConstant(CurrScalarSizeInBits, DL, NextVT); | |||
27886 | ||||
27887 | // Check if the upper half of the input element is zero. | |||
27888 | if (CurrVT.is512BitVector()) { | |||
27889 | MVT MaskVT = MVT::getVectorVT(MVT::i1, CurrVT.getVectorNumElements()); | |||
27890 | HiZ = DAG.getSetCC(DL, MaskVT, DAG.getBitcast(CurrVT, Op0), | |||
27891 | DAG.getBitcast(CurrVT, Zero), ISD::SETEQ); | |||
27892 | HiZ = DAG.getNode(ISD::SIGN_EXTEND, DL, CurrVT, HiZ); | |||
27893 | } else { | |||
27894 | HiZ = DAG.getSetCC(DL, CurrVT, DAG.getBitcast(CurrVT, Op0), | |||
27895 | DAG.getBitcast(CurrVT, Zero), ISD::SETEQ); | |||
27896 | } | |||
27897 | HiZ = DAG.getBitcast(NextVT, HiZ); | |||
27898 | ||||
27899 | // Move the upper/lower halves to the lower bits as we'll be extending to | |||
27900 | // NextVT. Mask the lower result to zero if HiZ is true and add the results | |||
27901 | // together. | |||
27902 | SDValue ResNext = Res = DAG.getBitcast(NextVT, Res); | |||
27903 | SDValue R0 = DAG.getNode(ISD::SRL, DL, NextVT, ResNext, Shift); | |||
27904 | SDValue R1 = DAG.getNode(ISD::SRL, DL, NextVT, HiZ, Shift); | |||
27905 | R1 = DAG.getNode(ISD::AND, DL, NextVT, ResNext, R1); | |||
27906 | Res = DAG.getNode(ISD::ADD, DL, NextVT, R0, R1); | |||
27907 | CurrVT = NextVT; | |||
27908 | } | |||
27909 | ||||
27910 | return Res; | |||
27911 | } | |||
27912 | ||||
27913 | static SDValue LowerVectorCTLZ(SDValue Op, const SDLoc &DL, | |||
27914 | const X86Subtarget &Subtarget, | |||
27915 | SelectionDAG &DAG) { | |||
27916 | MVT VT = Op.getSimpleValueType(); | |||
27917 | ||||
27918 | if (Subtarget.hasCDI() && | |||
27919 | // vXi8 vectors need to be promoted to 512-bits for vXi32. | |||
27920 | (Subtarget.canExtendTo512DQ() || VT.getVectorElementType() != MVT::i8)) | |||
27921 | return LowerVectorCTLZ_AVX512CDI(Op, DAG, Subtarget); | |||
27922 | ||||
27923 | // Decompose 256-bit ops into smaller 128-bit ops. | |||
27924 | if (VT.is256BitVector() && !Subtarget.hasInt256()) | |||
27925 | return splitVectorIntUnary(Op, DAG); | |||
27926 | ||||
27927 | // Decompose 512-bit ops into smaller 256-bit ops. | |||
27928 | if (VT.is512BitVector() && !Subtarget.hasBWI()) | |||
27929 | return splitVectorIntUnary(Op, DAG); | |||
27930 | ||||
27931 | assert(Subtarget.hasSSSE3() && "Expected SSSE3 support for PSHUFB")(static_cast <bool> (Subtarget.hasSSSE3() && "Expected SSSE3 support for PSHUFB" ) ? void (0) : __assert_fail ("Subtarget.hasSSSE3() && \"Expected SSSE3 support for PSHUFB\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 27931, __extension__ __PRETTY_FUNCTION__)); | |||
27932 | return LowerVectorCTLZInRegLUT(Op, DL, Subtarget, DAG); | |||
27933 | } | |||
27934 | ||||
27935 | static SDValue LowerCTLZ(SDValue Op, const X86Subtarget &Subtarget, | |||
27936 | SelectionDAG &DAG) { | |||
27937 | MVT VT = Op.getSimpleValueType(); | |||
27938 | MVT OpVT = VT; | |||
27939 | unsigned NumBits = VT.getSizeInBits(); | |||
27940 | SDLoc dl(Op); | |||
27941 | unsigned Opc = Op.getOpcode(); | |||
27942 | ||||
27943 | if (VT.isVector()) | |||
27944 | return LowerVectorCTLZ(Op, dl, Subtarget, DAG); | |||
27945 | ||||
27946 | Op = Op.getOperand(0); | |||
27947 | if (VT == MVT::i8) { | |||
27948 | // Zero extend to i32 since there is not an i8 bsr. | |||
27949 | OpVT = MVT::i32; | |||
27950 | Op = DAG.getNode(ISD::ZERO_EXTEND, dl, OpVT, Op); | |||
27951 | } | |||
27952 | ||||
27953 | // Issue a bsr (scan bits in reverse) which also sets EFLAGS. | |||
27954 | SDVTList VTs = DAG.getVTList(OpVT, MVT::i32); | |||
27955 | Op = DAG.getNode(X86ISD::BSR, dl, VTs, Op); | |||
27956 | ||||
27957 | if (Opc == ISD::CTLZ) { | |||
27958 | // If src is zero (i.e. bsr sets ZF), returns NumBits. | |||
27959 | SDValue Ops[] = {Op, DAG.getConstant(NumBits + NumBits - 1, dl, OpVT), | |||
27960 | DAG.getTargetConstant(X86::COND_E, dl, MVT::i8), | |||
27961 | Op.getValue(1)}; | |||
27962 | Op = DAG.getNode(X86ISD::CMOV, dl, OpVT, Ops); | |||
27963 | } | |||
27964 | ||||
27965 | // Finally xor with NumBits-1. | |||
27966 | Op = DAG.getNode(ISD::XOR, dl, OpVT, Op, | |||
27967 | DAG.getConstant(NumBits - 1, dl, OpVT)); | |||
27968 | ||||
27969 | if (VT == MVT::i8) | |||
27970 | Op = DAG.getNode(ISD::TRUNCATE, dl, MVT::i8, Op); | |||
27971 | return Op; | |||
27972 | } | |||
27973 | ||||
27974 | static SDValue LowerCTTZ(SDValue Op, const X86Subtarget &Subtarget, | |||
27975 | SelectionDAG &DAG) { | |||
27976 | MVT VT = Op.getSimpleValueType(); | |||
27977 | unsigned NumBits = VT.getScalarSizeInBits(); | |||
27978 | SDValue N0 = Op.getOperand(0); | |||
27979 | SDLoc dl(Op); | |||
27980 | ||||
27981 | assert(!VT.isVector() && Op.getOpcode() == ISD::CTTZ &&(static_cast <bool> (!VT.isVector() && Op.getOpcode () == ISD::CTTZ && "Only scalar CTTZ requires custom lowering" ) ? void (0) : __assert_fail ("!VT.isVector() && Op.getOpcode() == ISD::CTTZ && \"Only scalar CTTZ requires custom lowering\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 27982, __extension__ __PRETTY_FUNCTION__)) | |||
27982 | "Only scalar CTTZ requires custom lowering")(static_cast <bool> (!VT.isVector() && Op.getOpcode () == ISD::CTTZ && "Only scalar CTTZ requires custom lowering" ) ? void (0) : __assert_fail ("!VT.isVector() && Op.getOpcode() == ISD::CTTZ && \"Only scalar CTTZ requires custom lowering\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 27982, __extension__ __PRETTY_FUNCTION__)); | |||
27983 | ||||
27984 | // Issue a bsf (scan bits forward) which also sets EFLAGS. | |||
27985 | SDVTList VTs = DAG.getVTList(VT, MVT::i32); | |||
27986 | Op = DAG.getNode(X86ISD::BSF, dl, VTs, N0); | |||
27987 | ||||
27988 | // If src is zero (i.e. bsf sets ZF), returns NumBits. | |||
27989 | SDValue Ops[] = {Op, DAG.getConstant(NumBits, dl, VT), | |||
27990 | DAG.getTargetConstant(X86::COND_E, dl, MVT::i8), | |||
27991 | Op.getValue(1)}; | |||
27992 | return DAG.getNode(X86ISD::CMOV, dl, VT, Ops); | |||
27993 | } | |||
27994 | ||||
27995 | static SDValue lowerAddSub(SDValue Op, SelectionDAG &DAG, | |||
27996 | const X86Subtarget &Subtarget) { | |||
27997 | MVT VT = Op.getSimpleValueType(); | |||
27998 | if (VT == MVT::i16 || VT == MVT::i32) | |||
27999 | return lowerAddSubToHorizontalOp(Op, DAG, Subtarget); | |||
28000 | ||||
28001 | if (VT == MVT::v32i16 || VT == MVT::v64i8) | |||
28002 | return splitVectorIntBinary(Op, DAG); | |||
28003 | ||||
28004 | assert(Op.getSimpleValueType().is256BitVector() &&(static_cast <bool> (Op.getSimpleValueType().is256BitVector () && Op.getSimpleValueType().isInteger() && "Only handle AVX 256-bit vector integer operation" ) ? void (0) : __assert_fail ("Op.getSimpleValueType().is256BitVector() && Op.getSimpleValueType().isInteger() && \"Only handle AVX 256-bit vector integer operation\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 28006, __extension__ __PRETTY_FUNCTION__)) | |||
28005 | Op.getSimpleValueType().isInteger() &&(static_cast <bool> (Op.getSimpleValueType().is256BitVector () && Op.getSimpleValueType().isInteger() && "Only handle AVX 256-bit vector integer operation" ) ? void (0) : __assert_fail ("Op.getSimpleValueType().is256BitVector() && Op.getSimpleValueType().isInteger() && \"Only handle AVX 256-bit vector integer operation\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 28006, __extension__ __PRETTY_FUNCTION__)) | |||
28006 | "Only handle AVX 256-bit vector integer operation")(static_cast <bool> (Op.getSimpleValueType().is256BitVector () && Op.getSimpleValueType().isInteger() && "Only handle AVX 256-bit vector integer operation" ) ? void (0) : __assert_fail ("Op.getSimpleValueType().is256BitVector() && Op.getSimpleValueType().isInteger() && \"Only handle AVX 256-bit vector integer operation\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 28006, __extension__ __PRETTY_FUNCTION__)); | |||
28007 | return splitVectorIntBinary(Op, DAG); | |||
28008 | } | |||
28009 | ||||
28010 | static SDValue LowerADDSAT_SUBSAT(SDValue Op, SelectionDAG &DAG, | |||
28011 | const X86Subtarget &Subtarget) { | |||
28012 | MVT VT = Op.getSimpleValueType(); | |||
28013 | SDValue X = Op.getOperand(0), Y = Op.getOperand(1); | |||
28014 | unsigned Opcode = Op.getOpcode(); | |||
28015 | SDLoc DL(Op); | |||
28016 | ||||
28017 | if (VT == MVT::v32i16 || VT == MVT::v64i8 || | |||
28018 | (VT.is256BitVector() && !Subtarget.hasInt256())) { | |||
28019 | assert(Op.getSimpleValueType().isInteger() &&(static_cast <bool> (Op.getSimpleValueType().isInteger( ) && "Only handle AVX vector integer operation") ? void (0) : __assert_fail ("Op.getSimpleValueType().isInteger() && \"Only handle AVX vector integer operation\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 28020, __extension__ __PRETTY_FUNCTION__)) | |||
28020 | "Only handle AVX vector integer operation")(static_cast <bool> (Op.getSimpleValueType().isInteger( ) && "Only handle AVX vector integer operation") ? void (0) : __assert_fail ("Op.getSimpleValueType().isInteger() && \"Only handle AVX vector integer operation\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 28020, __extension__ __PRETTY_FUNCTION__)); | |||
28021 | return splitVectorIntBinary(Op, DAG); | |||
28022 | } | |||
28023 | ||||
28024 | // Avoid the generic expansion with min/max if we don't have pminu*/pmaxu*. | |||
28025 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
28026 | EVT SetCCResultType = | |||
28027 | TLI.getSetCCResultType(DAG.getDataLayout(), *DAG.getContext(), VT); | |||
28028 | ||||
28029 | if (Opcode == ISD::USUBSAT && !TLI.isOperationLegal(ISD::UMAX, VT)) { | |||
28030 | // usubsat X, Y --> (X >u Y) ? X - Y : 0 | |||
28031 | SDValue Sub = DAG.getNode(ISD::SUB, DL, VT, X, Y); | |||
28032 | SDValue Cmp = DAG.getSetCC(DL, SetCCResultType, X, Y, ISD::SETUGT); | |||
28033 | // TODO: Move this to DAGCombiner? | |||
28034 | if (SetCCResultType == VT && | |||
28035 | DAG.ComputeNumSignBits(Cmp) == VT.getScalarSizeInBits()) | |||
28036 | return DAG.getNode(ISD::AND, DL, VT, Cmp, Sub); | |||
28037 | return DAG.getSelect(DL, VT, Cmp, Sub, DAG.getConstant(0, DL, VT)); | |||
28038 | } | |||
28039 | ||||
28040 | if ((Opcode == ISD::SADDSAT || Opcode == ISD::SSUBSAT) && | |||
28041 | (!VT.isVector() || VT == MVT::v2i64)) { | |||
28042 | unsigned BitWidth = VT.getScalarSizeInBits(); | |||
28043 | APInt MinVal = APInt::getSignedMinValue(BitWidth); | |||
28044 | APInt MaxVal = APInt::getSignedMaxValue(BitWidth); | |||
28045 | SDValue Zero = DAG.getConstant(0, DL, VT); | |||
28046 | SDValue Result = | |||
28047 | DAG.getNode(Opcode == ISD::SADDSAT ? ISD::SADDO : ISD::SSUBO, DL, | |||
28048 | DAG.getVTList(VT, SetCCResultType), X, Y); | |||
28049 | SDValue SumDiff = Result.getValue(0); | |||
28050 | SDValue Overflow = Result.getValue(1); | |||
28051 | SDValue SatMin = DAG.getConstant(MinVal, DL, VT); | |||
28052 | SDValue SatMax = DAG.getConstant(MaxVal, DL, VT); | |||
28053 | SDValue SumNeg = | |||
28054 | DAG.getSetCC(DL, SetCCResultType, SumDiff, Zero, ISD::SETLT); | |||
28055 | Result = DAG.getSelect(DL, VT, SumNeg, SatMax, SatMin); | |||
28056 | return DAG.getSelect(DL, VT, Overflow, Result, SumDiff); | |||
28057 | } | |||
28058 | ||||
28059 | // Use default expansion. | |||
28060 | return SDValue(); | |||
28061 | } | |||
28062 | ||||
28063 | static SDValue LowerABS(SDValue Op, const X86Subtarget &Subtarget, | |||
28064 | SelectionDAG &DAG) { | |||
28065 | MVT VT = Op.getSimpleValueType(); | |||
28066 | if (VT == MVT::i16 || VT == MVT::i32 || VT == MVT::i64) { | |||
28067 | // Since X86 does not have CMOV for 8-bit integer, we don't convert | |||
28068 | // 8-bit integer abs to NEG and CMOV. | |||
28069 | SDLoc DL(Op); | |||
28070 | SDValue N0 = Op.getOperand(0); | |||
28071 | SDValue Neg = DAG.getNode(X86ISD::SUB, DL, DAG.getVTList(VT, MVT::i32), | |||
28072 | DAG.getConstant(0, DL, VT), N0); | |||
28073 | SDValue Ops[] = {N0, Neg, DAG.getTargetConstant(X86::COND_GE, DL, MVT::i8), | |||
28074 | SDValue(Neg.getNode(), 1)}; | |||
28075 | return DAG.getNode(X86ISD::CMOV, DL, VT, Ops); | |||
28076 | } | |||
28077 | ||||
28078 | // ABS(vXi64 X) --> VPBLENDVPD(X, 0-X, X). | |||
28079 | if ((VT == MVT::v2i64 || VT == MVT::v4i64) && Subtarget.hasSSE41()) { | |||
28080 | SDLoc DL(Op); | |||
28081 | SDValue Src = Op.getOperand(0); | |||
28082 | SDValue Sub = | |||
28083 | DAG.getNode(ISD::SUB, DL, VT, DAG.getConstant(0, DL, VT), Src); | |||
28084 | return DAG.getNode(X86ISD::BLENDV, DL, VT, Src, Sub, Src); | |||
28085 | } | |||
28086 | ||||
28087 | if (VT.is256BitVector() && !Subtarget.hasInt256()) { | |||
28088 | assert(VT.isInteger() &&(static_cast <bool> (VT.isInteger() && "Only handle AVX 256-bit vector integer operation" ) ? void (0) : __assert_fail ("VT.isInteger() && \"Only handle AVX 256-bit vector integer operation\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 28089, __extension__ __PRETTY_FUNCTION__)) | |||
28089 | "Only handle AVX 256-bit vector integer operation")(static_cast <bool> (VT.isInteger() && "Only handle AVX 256-bit vector integer operation" ) ? void (0) : __assert_fail ("VT.isInteger() && \"Only handle AVX 256-bit vector integer operation\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 28089, __extension__ __PRETTY_FUNCTION__)); | |||
28090 | return splitVectorIntUnary(Op, DAG); | |||
28091 | } | |||
28092 | ||||
28093 | if ((VT == MVT::v32i16 || VT == MVT::v64i8) && !Subtarget.hasBWI()) | |||
28094 | return splitVectorIntUnary(Op, DAG); | |||
28095 | ||||
28096 | // Default to expand. | |||
28097 | return SDValue(); | |||
28098 | } | |||
28099 | ||||
28100 | static SDValue LowerMINMAX(SDValue Op, SelectionDAG &DAG) { | |||
28101 | MVT VT = Op.getSimpleValueType(); | |||
28102 | ||||
28103 | // For AVX1 cases, split to use legal ops (everything but v4i64). | |||
28104 | if (VT.getScalarType() != MVT::i64 && VT.is256BitVector()) | |||
28105 | return splitVectorIntBinary(Op, DAG); | |||
28106 | ||||
28107 | if (VT == MVT::v32i16 || VT == MVT::v64i8) | |||
28108 | return splitVectorIntBinary(Op, DAG); | |||
28109 | ||||
28110 | // Default to expand. | |||
28111 | return SDValue(); | |||
28112 | } | |||
28113 | ||||
28114 | static SDValue LowerMUL(SDValue Op, const X86Subtarget &Subtarget, | |||
28115 | SelectionDAG &DAG) { | |||
28116 | SDLoc dl(Op); | |||
28117 | MVT VT = Op.getSimpleValueType(); | |||
28118 | ||||
28119 | // Decompose 256-bit ops into 128-bit ops. | |||
28120 | if (VT.is256BitVector() && !Subtarget.hasInt256()) | |||
28121 | return splitVectorIntBinary(Op, DAG); | |||
28122 | ||||
28123 | if ((VT == MVT::v32i16 || VT == MVT::v64i8) && !Subtarget.hasBWI()) | |||
28124 | return splitVectorIntBinary(Op, DAG); | |||
28125 | ||||
28126 | SDValue A = Op.getOperand(0); | |||
28127 | SDValue B = Op.getOperand(1); | |||
28128 | ||||
28129 | // Lower v16i8/v32i8/v64i8 mul as sign-extension to v8i16/v16i16/v32i16 | |||
28130 | // vector pairs, multiply and truncate. | |||
28131 | if (VT == MVT::v16i8 || VT == MVT::v32i8 || VT == MVT::v64i8) { | |||
28132 | unsigned NumElts = VT.getVectorNumElements(); | |||
28133 | ||||
28134 | if ((VT == MVT::v16i8 && Subtarget.hasInt256()) || | |||
28135 | (VT == MVT::v32i8 && Subtarget.canExtendTo512BW())) { | |||
28136 | MVT ExVT = MVT::getVectorVT(MVT::i16, VT.getVectorNumElements()); | |||
28137 | return DAG.getNode( | |||
28138 | ISD::TRUNCATE, dl, VT, | |||
28139 | DAG.getNode(ISD::MUL, dl, ExVT, | |||
28140 | DAG.getNode(ISD::ANY_EXTEND, dl, ExVT, A), | |||
28141 | DAG.getNode(ISD::ANY_EXTEND, dl, ExVT, B))); | |||
28142 | } | |||
28143 | ||||
28144 | MVT ExVT = MVT::getVectorVT(MVT::i16, NumElts / 2); | |||
28145 | ||||
28146 | // Extract the lo/hi parts to any extend to i16. | |||
28147 | // We're going to mask off the low byte of each result element of the | |||
28148 | // pmullw, so it doesn't matter what's in the high byte of each 16-bit | |||
28149 | // element. | |||
28150 | SDValue Undef = DAG.getUNDEF(VT); | |||
28151 | SDValue ALo = DAG.getBitcast(ExVT, getUnpackl(DAG, dl, VT, A, Undef)); | |||
28152 | SDValue AHi = DAG.getBitcast(ExVT, getUnpackh(DAG, dl, VT, A, Undef)); | |||
28153 | ||||
28154 | SDValue BLo, BHi; | |||
28155 | if (ISD::isBuildVectorOfConstantSDNodes(B.getNode())) { | |||
28156 | // If the RHS is a constant, manually unpackl/unpackh. | |||
28157 | SmallVector<SDValue, 16> LoOps, HiOps; | |||
28158 | for (unsigned i = 0; i != NumElts; i += 16) { | |||
28159 | for (unsigned j = 0; j != 8; ++j) { | |||
28160 | LoOps.push_back(DAG.getAnyExtOrTrunc(B.getOperand(i + j), dl, | |||
28161 | MVT::i16)); | |||
28162 | HiOps.push_back(DAG.getAnyExtOrTrunc(B.getOperand(i + j + 8), dl, | |||
28163 | MVT::i16)); | |||
28164 | } | |||
28165 | } | |||
28166 | ||||
28167 | BLo = DAG.getBuildVector(ExVT, dl, LoOps); | |||
28168 | BHi = DAG.getBuildVector(ExVT, dl, HiOps); | |||
28169 | } else { | |||
28170 | BLo = DAG.getBitcast(ExVT, getUnpackl(DAG, dl, VT, B, Undef)); | |||
28171 | BHi = DAG.getBitcast(ExVT, getUnpackh(DAG, dl, VT, B, Undef)); | |||
28172 | } | |||
28173 | ||||
28174 | // Multiply, mask the lower 8bits of the lo/hi results and pack. | |||
28175 | SDValue RLo = DAG.getNode(ISD::MUL, dl, ExVT, ALo, BLo); | |||
28176 | SDValue RHi = DAG.getNode(ISD::MUL, dl, ExVT, AHi, BHi); | |||
28177 | RLo = DAG.getNode(ISD::AND, dl, ExVT, RLo, DAG.getConstant(255, dl, ExVT)); | |||
28178 | RHi = DAG.getNode(ISD::AND, dl, ExVT, RHi, DAG.getConstant(255, dl, ExVT)); | |||
28179 | return DAG.getNode(X86ISD::PACKUS, dl, VT, RLo, RHi); | |||
28180 | } | |||
28181 | ||||
28182 | // Lower v4i32 mul as 2x shuffle, 2x pmuludq, 2x shuffle. | |||
28183 | if (VT == MVT::v4i32) { | |||
28184 | assert(Subtarget.hasSSE2() && !Subtarget.hasSSE41() &&(static_cast <bool> (Subtarget.hasSSE2() && !Subtarget .hasSSE41() && "Should not custom lower when pmulld is available!" ) ? void (0) : __assert_fail ("Subtarget.hasSSE2() && !Subtarget.hasSSE41() && \"Should not custom lower when pmulld is available!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 28185, __extension__ __PRETTY_FUNCTION__)) | |||
28185 | "Should not custom lower when pmulld is available!")(static_cast <bool> (Subtarget.hasSSE2() && !Subtarget .hasSSE41() && "Should not custom lower when pmulld is available!" ) ? void (0) : __assert_fail ("Subtarget.hasSSE2() && !Subtarget.hasSSE41() && \"Should not custom lower when pmulld is available!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 28185, __extension__ __PRETTY_FUNCTION__)); | |||
28186 | ||||
28187 | // Extract the odd parts. | |||
28188 | static const int UnpackMask[] = { 1, -1, 3, -1 }; | |||
28189 | SDValue Aodds = DAG.getVectorShuffle(VT, dl, A, A, UnpackMask); | |||
28190 | SDValue Bodds = DAG.getVectorShuffle(VT, dl, B, B, UnpackMask); | |||
28191 | ||||
28192 | // Multiply the even parts. | |||
28193 | SDValue Evens = DAG.getNode(X86ISD::PMULUDQ, dl, MVT::v2i64, | |||
28194 | DAG.getBitcast(MVT::v2i64, A), | |||
28195 | DAG.getBitcast(MVT::v2i64, B)); | |||
28196 | // Now multiply odd parts. | |||
28197 | SDValue Odds = DAG.getNode(X86ISD::PMULUDQ, dl, MVT::v2i64, | |||
28198 | DAG.getBitcast(MVT::v2i64, Aodds), | |||
28199 | DAG.getBitcast(MVT::v2i64, Bodds)); | |||
28200 | ||||
28201 | Evens = DAG.getBitcast(VT, Evens); | |||
28202 | Odds = DAG.getBitcast(VT, Odds); | |||
28203 | ||||
28204 | // Merge the two vectors back together with a shuffle. This expands into 2 | |||
28205 | // shuffles. | |||
28206 | static const int ShufMask[] = { 0, 4, 2, 6 }; | |||
28207 | return DAG.getVectorShuffle(VT, dl, Evens, Odds, ShufMask); | |||
28208 | } | |||
28209 | ||||
28210 | assert((VT == MVT::v2i64 || VT == MVT::v4i64 || VT == MVT::v8i64) &&(static_cast <bool> ((VT == MVT::v2i64 || VT == MVT::v4i64 || VT == MVT::v8i64) && "Only know how to lower V2I64/V4I64/V8I64 multiply" ) ? void (0) : __assert_fail ("(VT == MVT::v2i64 || VT == MVT::v4i64 || VT == MVT::v8i64) && \"Only know how to lower V2I64/V4I64/V8I64 multiply\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 28211, __extension__ __PRETTY_FUNCTION__)) | |||
28211 | "Only know how to lower V2I64/V4I64/V8I64 multiply")(static_cast <bool> ((VT == MVT::v2i64 || VT == MVT::v4i64 || VT == MVT::v8i64) && "Only know how to lower V2I64/V4I64/V8I64 multiply" ) ? void (0) : __assert_fail ("(VT == MVT::v2i64 || VT == MVT::v4i64 || VT == MVT::v8i64) && \"Only know how to lower V2I64/V4I64/V8I64 multiply\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 28211, __extension__ __PRETTY_FUNCTION__)); | |||
28212 | assert(!Subtarget.hasDQI() && "DQI should use MULLQ")(static_cast <bool> (!Subtarget.hasDQI() && "DQI should use MULLQ" ) ? void (0) : __assert_fail ("!Subtarget.hasDQI() && \"DQI should use MULLQ\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 28212, __extension__ __PRETTY_FUNCTION__)); | |||
28213 | ||||
28214 | // Ahi = psrlqi(a, 32); | |||
28215 | // Bhi = psrlqi(b, 32); | |||
28216 | // | |||
28217 | // AloBlo = pmuludq(a, b); | |||
28218 | // AloBhi = pmuludq(a, Bhi); | |||
28219 | // AhiBlo = pmuludq(Ahi, b); | |||
28220 | // | |||
28221 | // Hi = psllqi(AloBhi + AhiBlo, 32); | |||
28222 | // return AloBlo + Hi; | |||
28223 | KnownBits AKnown = DAG.computeKnownBits(A); | |||
28224 | KnownBits BKnown = DAG.computeKnownBits(B); | |||
28225 | ||||
28226 | APInt LowerBitsMask = APInt::getLowBitsSet(64, 32); | |||
28227 | bool ALoIsZero = LowerBitsMask.isSubsetOf(AKnown.Zero); | |||
28228 | bool BLoIsZero = LowerBitsMask.isSubsetOf(BKnown.Zero); | |||
28229 | ||||
28230 | APInt UpperBitsMask = APInt::getHighBitsSet(64, 32); | |||
28231 | bool AHiIsZero = UpperBitsMask.isSubsetOf(AKnown.Zero); | |||
28232 | bool BHiIsZero = UpperBitsMask.isSubsetOf(BKnown.Zero); | |||
28233 | ||||
28234 | SDValue Zero = DAG.getConstant(0, dl, VT); | |||
28235 | ||||
28236 | // Only multiply lo/hi halves that aren't known to be zero. | |||
28237 | SDValue AloBlo = Zero; | |||
28238 | if (!ALoIsZero && !BLoIsZero) | |||
28239 | AloBlo = DAG.getNode(X86ISD::PMULUDQ, dl, VT, A, B); | |||
28240 | ||||
28241 | SDValue AloBhi = Zero; | |||
28242 | if (!ALoIsZero && !BHiIsZero) { | |||
28243 | SDValue Bhi = getTargetVShiftByConstNode(X86ISD::VSRLI, dl, VT, B, 32, DAG); | |||
28244 | AloBhi = DAG.getNode(X86ISD::PMULUDQ, dl, VT, A, Bhi); | |||
28245 | } | |||
28246 | ||||
28247 | SDValue AhiBlo = Zero; | |||
28248 | if (!AHiIsZero && !BLoIsZero) { | |||
28249 | SDValue Ahi = getTargetVShiftByConstNode(X86ISD::VSRLI, dl, VT, A, 32, DAG); | |||
28250 | AhiBlo = DAG.getNode(X86ISD::PMULUDQ, dl, VT, Ahi, B); | |||
28251 | } | |||
28252 | ||||
28253 | SDValue Hi = DAG.getNode(ISD::ADD, dl, VT, AloBhi, AhiBlo); | |||
28254 | Hi = getTargetVShiftByConstNode(X86ISD::VSHLI, dl, VT, Hi, 32, DAG); | |||
28255 | ||||
28256 | return DAG.getNode(ISD::ADD, dl, VT, AloBlo, Hi); | |||
28257 | } | |||
28258 | ||||
28259 | static SDValue LowervXi8MulWithUNPCK(SDValue A, SDValue B, const SDLoc &dl, | |||
28260 | MVT VT, bool IsSigned, | |||
28261 | const X86Subtarget &Subtarget, | |||
28262 | SelectionDAG &DAG, | |||
28263 | SDValue *Low = nullptr) { | |||
28264 | unsigned NumElts = VT.getVectorNumElements(); | |||
28265 | ||||
28266 | // For vXi8 we will unpack the low and high half of each 128 bit lane to widen | |||
28267 | // to a vXi16 type. Do the multiplies, shift the results and pack the half | |||
28268 | // lane results back together. | |||
28269 | ||||
28270 | // We'll take different approaches for signed and unsigned. | |||
28271 | // For unsigned we'll use punpcklbw/punpckhbw to put zero extend the bytes | |||
28272 | // and use pmullw to calculate the full 16-bit product. | |||
28273 | // For signed we'll use punpcklbw/punpckbw to extend the bytes to words and | |||
28274 | // shift them left into the upper byte of each word. This allows us to use | |||
28275 | // pmulhw to calculate the full 16-bit product. This trick means we don't | |||
28276 | // need to sign extend the bytes to use pmullw. | |||
28277 | ||||
28278 | MVT ExVT = MVT::getVectorVT(MVT::i16, NumElts / 2); | |||
28279 | SDValue Zero = DAG.getConstant(0, dl, VT); | |||
28280 | ||||
28281 | SDValue ALo, AHi; | |||
28282 | if (IsSigned) { | |||
28283 | ALo = DAG.getBitcast(ExVT, getUnpackl(DAG, dl, VT, Zero, A)); | |||
28284 | AHi = DAG.getBitcast(ExVT, getUnpackh(DAG, dl, VT, Zero, A)); | |||
28285 | } else { | |||
28286 | ALo = DAG.getBitcast(ExVT, getUnpackl(DAG, dl, VT, A, Zero)); | |||
28287 | AHi = DAG.getBitcast(ExVT, getUnpackh(DAG, dl, VT, A, Zero)); | |||
28288 | } | |||
28289 | ||||
28290 | SDValue BLo, BHi; | |||
28291 | if (ISD::isBuildVectorOfConstantSDNodes(B.getNode())) { | |||
28292 | // If the RHS is a constant, manually unpackl/unpackh and extend. | |||
28293 | SmallVector<SDValue, 16> LoOps, HiOps; | |||
28294 | for (unsigned i = 0; i != NumElts; i += 16) { | |||
28295 | for (unsigned j = 0; j != 8; ++j) { | |||
28296 | SDValue LoOp = B.getOperand(i + j); | |||
28297 | SDValue HiOp = B.getOperand(i + j + 8); | |||
28298 | ||||
28299 | if (IsSigned) { | |||
28300 | LoOp = DAG.getAnyExtOrTrunc(LoOp, dl, MVT::i16); | |||
28301 | HiOp = DAG.getAnyExtOrTrunc(HiOp, dl, MVT::i16); | |||
28302 | LoOp = DAG.getNode(ISD::SHL, dl, MVT::i16, LoOp, | |||
28303 | DAG.getConstant(8, dl, MVT::i16)); | |||
28304 | HiOp = DAG.getNode(ISD::SHL, dl, MVT::i16, HiOp, | |||
28305 | DAG.getConstant(8, dl, MVT::i16)); | |||
28306 | } else { | |||
28307 | LoOp = DAG.getZExtOrTrunc(LoOp, dl, MVT::i16); | |||
28308 | HiOp = DAG.getZExtOrTrunc(HiOp, dl, MVT::i16); | |||
28309 | } | |||
28310 | ||||
28311 | LoOps.push_back(LoOp); | |||
28312 | HiOps.push_back(HiOp); | |||
28313 | } | |||
28314 | } | |||
28315 | ||||
28316 | BLo = DAG.getBuildVector(ExVT, dl, LoOps); | |||
28317 | BHi = DAG.getBuildVector(ExVT, dl, HiOps); | |||
28318 | } else if (IsSigned) { | |||
28319 | BLo = DAG.getBitcast(ExVT, getUnpackl(DAG, dl, VT, Zero, B)); | |||
28320 | BHi = DAG.getBitcast(ExVT, getUnpackh(DAG, dl, VT, Zero, B)); | |||
28321 | } else { | |||
28322 | BLo = DAG.getBitcast(ExVT, getUnpackl(DAG, dl, VT, B, Zero)); | |||
28323 | BHi = DAG.getBitcast(ExVT, getUnpackh(DAG, dl, VT, B, Zero)); | |||
28324 | } | |||
28325 | ||||
28326 | // Multiply, lshr the upper 8bits to the lower 8bits of the lo/hi results and | |||
28327 | // pack back to vXi8. | |||
28328 | unsigned MulOpc = IsSigned ? ISD::MULHS : ISD::MUL; | |||
28329 | SDValue RLo = DAG.getNode(MulOpc, dl, ExVT, ALo, BLo); | |||
28330 | SDValue RHi = DAG.getNode(MulOpc, dl, ExVT, AHi, BHi); | |||
28331 | ||||
28332 | if (Low) { | |||
28333 | // Mask the lower bits and pack the results to rejoin the halves. | |||
28334 | SDValue Mask = DAG.getConstant(255, dl, ExVT); | |||
28335 | SDValue LLo = DAG.getNode(ISD::AND, dl, ExVT, RLo, Mask); | |||
28336 | SDValue LHi = DAG.getNode(ISD::AND, dl, ExVT, RHi, Mask); | |||
28337 | *Low = DAG.getNode(X86ISD::PACKUS, dl, VT, LLo, LHi); | |||
28338 | } | |||
28339 | ||||
28340 | RLo = getTargetVShiftByConstNode(X86ISD::VSRLI, dl, ExVT, RLo, 8, DAG); | |||
28341 | RHi = getTargetVShiftByConstNode(X86ISD::VSRLI, dl, ExVT, RHi, 8, DAG); | |||
28342 | ||||
28343 | // Bitcast back to VT and then pack all the even elements from Lo and Hi. | |||
28344 | return DAG.getNode(X86ISD::PACKUS, dl, VT, RLo, RHi); | |||
28345 | } | |||
28346 | ||||
28347 | static SDValue LowerMULH(SDValue Op, const X86Subtarget &Subtarget, | |||
28348 | SelectionDAG &DAG) { | |||
28349 | SDLoc dl(Op); | |||
28350 | MVT VT = Op.getSimpleValueType(); | |||
28351 | bool IsSigned = Op->getOpcode() == ISD::MULHS; | |||
28352 | unsigned NumElts = VT.getVectorNumElements(); | |||
28353 | SDValue A = Op.getOperand(0); | |||
28354 | SDValue B = Op.getOperand(1); | |||
28355 | ||||
28356 | // Decompose 256-bit ops into 128-bit ops. | |||
28357 | if (VT.is256BitVector() && !Subtarget.hasInt256()) | |||
28358 | return splitVectorIntBinary(Op, DAG); | |||
28359 | ||||
28360 | if ((VT == MVT::v32i16 || VT == MVT::v64i8) && !Subtarget.hasBWI()) | |||
28361 | return splitVectorIntBinary(Op, DAG); | |||
28362 | ||||
28363 | if (VT == MVT::v4i32 || VT == MVT::v8i32 || VT == MVT::v16i32) { | |||
28364 | assert((VT == MVT::v4i32 && Subtarget.hasSSE2()) ||(static_cast <bool> ((VT == MVT::v4i32 && Subtarget .hasSSE2()) || (VT == MVT::v8i32 && Subtarget.hasInt256 ()) || (VT == MVT::v16i32 && Subtarget.hasAVX512())) ? void (0) : __assert_fail ("(VT == MVT::v4i32 && Subtarget.hasSSE2()) || (VT == MVT::v8i32 && Subtarget.hasInt256()) || (VT == MVT::v16i32 && Subtarget.hasAVX512())" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 28366, __extension__ __PRETTY_FUNCTION__)) | |||
28365 | (VT == MVT::v8i32 && Subtarget.hasInt256()) ||(static_cast <bool> ((VT == MVT::v4i32 && Subtarget .hasSSE2()) || (VT == MVT::v8i32 && Subtarget.hasInt256 ()) || (VT == MVT::v16i32 && Subtarget.hasAVX512())) ? void (0) : __assert_fail ("(VT == MVT::v4i32 && Subtarget.hasSSE2()) || (VT == MVT::v8i32 && Subtarget.hasInt256()) || (VT == MVT::v16i32 && Subtarget.hasAVX512())" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 28366, __extension__ __PRETTY_FUNCTION__)) | |||
28366 | (VT == MVT::v16i32 && Subtarget.hasAVX512()))(static_cast <bool> ((VT == MVT::v4i32 && Subtarget .hasSSE2()) || (VT == MVT::v8i32 && Subtarget.hasInt256 ()) || (VT == MVT::v16i32 && Subtarget.hasAVX512())) ? void (0) : __assert_fail ("(VT == MVT::v4i32 && Subtarget.hasSSE2()) || (VT == MVT::v8i32 && Subtarget.hasInt256()) || (VT == MVT::v16i32 && Subtarget.hasAVX512())" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 28366, __extension__ __PRETTY_FUNCTION__)); | |||
28367 | ||||
28368 | // PMULxD operations multiply each even value (starting at 0) of LHS with | |||
28369 | // the related value of RHS and produce a widen result. | |||
28370 | // E.g., PMULUDQ <4 x i32> <a|b|c|d>, <4 x i32> <e|f|g|h> | |||
28371 | // => <2 x i64> <ae|cg> | |||
28372 | // | |||
28373 | // In other word, to have all the results, we need to perform two PMULxD: | |||
28374 | // 1. one with the even values. | |||
28375 | // 2. one with the odd values. | |||
28376 | // To achieve #2, with need to place the odd values at an even position. | |||
28377 | // | |||
28378 | // Place the odd value at an even position (basically, shift all values 1 | |||
28379 | // step to the left): | |||
28380 | const int Mask[] = {1, -1, 3, -1, 5, -1, 7, -1, | |||
28381 | 9, -1, 11, -1, 13, -1, 15, -1}; | |||
28382 | // <a|b|c|d> => <b|undef|d|undef> | |||
28383 | SDValue Odd0 = DAG.getVectorShuffle(VT, dl, A, A, | |||
28384 | makeArrayRef(&Mask[0], NumElts)); | |||
28385 | // <e|f|g|h> => <f|undef|h|undef> | |||
28386 | SDValue Odd1 = DAG.getVectorShuffle(VT, dl, B, B, | |||
28387 | makeArrayRef(&Mask[0], NumElts)); | |||
28388 | ||||
28389 | // Emit two multiplies, one for the lower 2 ints and one for the higher 2 | |||
28390 | // ints. | |||
28391 | MVT MulVT = MVT::getVectorVT(MVT::i64, NumElts / 2); | |||
28392 | unsigned Opcode = | |||
28393 | (IsSigned && Subtarget.hasSSE41()) ? X86ISD::PMULDQ : X86ISD::PMULUDQ; | |||
28394 | // PMULUDQ <4 x i32> <a|b|c|d>, <4 x i32> <e|f|g|h> | |||
28395 | // => <2 x i64> <ae|cg> | |||
28396 | SDValue Mul1 = DAG.getBitcast(VT, DAG.getNode(Opcode, dl, MulVT, | |||
28397 | DAG.getBitcast(MulVT, A), | |||
28398 | DAG.getBitcast(MulVT, B))); | |||
28399 | // PMULUDQ <4 x i32> <b|undef|d|undef>, <4 x i32> <f|undef|h|undef> | |||
28400 | // => <2 x i64> <bf|dh> | |||
28401 | SDValue Mul2 = DAG.getBitcast(VT, DAG.getNode(Opcode, dl, MulVT, | |||
28402 | DAG.getBitcast(MulVT, Odd0), | |||
28403 | DAG.getBitcast(MulVT, Odd1))); | |||
28404 | ||||
28405 | // Shuffle it back into the right order. | |||
28406 | SmallVector<int, 16> ShufMask(NumElts); | |||
28407 | for (int i = 0; i != (int)NumElts; ++i) | |||
28408 | ShufMask[i] = (i / 2) * 2 + ((i % 2) * NumElts) + 1; | |||
28409 | ||||
28410 | SDValue Res = DAG.getVectorShuffle(VT, dl, Mul1, Mul2, ShufMask); | |||
28411 | ||||
28412 | // If we have a signed multiply but no PMULDQ fix up the result of an | |||
28413 | // unsigned multiply. | |||
28414 | if (IsSigned && !Subtarget.hasSSE41()) { | |||
28415 | SDValue Zero = DAG.getConstant(0, dl, VT); | |||
28416 | SDValue T1 = DAG.getNode(ISD::AND, dl, VT, | |||
28417 | DAG.getSetCC(dl, VT, Zero, A, ISD::SETGT), B); | |||
28418 | SDValue T2 = DAG.getNode(ISD::AND, dl, VT, | |||
28419 | DAG.getSetCC(dl, VT, Zero, B, ISD::SETGT), A); | |||
28420 | ||||
28421 | SDValue Fixup = DAG.getNode(ISD::ADD, dl, VT, T1, T2); | |||
28422 | Res = DAG.getNode(ISD::SUB, dl, VT, Res, Fixup); | |||
28423 | } | |||
28424 | ||||
28425 | return Res; | |||
28426 | } | |||
28427 | ||||
28428 | // Only i8 vectors should need custom lowering after this. | |||
28429 | assert((VT == MVT::v16i8 || (VT == MVT::v32i8 && Subtarget.hasInt256()) ||(static_cast <bool> ((VT == MVT::v16i8 || (VT == MVT::v32i8 && Subtarget.hasInt256()) || (VT == MVT::v64i8 && Subtarget.hasBWI())) && "Unsupported vector type") ? void (0) : __assert_fail ("(VT == MVT::v16i8 || (VT == MVT::v32i8 && Subtarget.hasInt256()) || (VT == MVT::v64i8 && Subtarget.hasBWI())) && \"Unsupported vector type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 28431, __extension__ __PRETTY_FUNCTION__)) | |||
28430 | (VT == MVT::v64i8 && Subtarget.hasBWI())) &&(static_cast <bool> ((VT == MVT::v16i8 || (VT == MVT::v32i8 && Subtarget.hasInt256()) || (VT == MVT::v64i8 && Subtarget.hasBWI())) && "Unsupported vector type") ? void (0) : __assert_fail ("(VT == MVT::v16i8 || (VT == MVT::v32i8 && Subtarget.hasInt256()) || (VT == MVT::v64i8 && Subtarget.hasBWI())) && \"Unsupported vector type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 28431, __extension__ __PRETTY_FUNCTION__)) | |||
28431 | "Unsupported vector type")(static_cast <bool> ((VT == MVT::v16i8 || (VT == MVT::v32i8 && Subtarget.hasInt256()) || (VT == MVT::v64i8 && Subtarget.hasBWI())) && "Unsupported vector type") ? void (0) : __assert_fail ("(VT == MVT::v16i8 || (VT == MVT::v32i8 && Subtarget.hasInt256()) || (VT == MVT::v64i8 && Subtarget.hasBWI())) && \"Unsupported vector type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 28431, __extension__ __PRETTY_FUNCTION__)); | |||
28432 | ||||
28433 | // Lower v16i8/v32i8 as extension to v8i16/v16i16 vector pairs, multiply, | |||
28434 | // logical shift down the upper half and pack back to i8. | |||
28435 | ||||
28436 | // With SSE41 we can use sign/zero extend, but for pre-SSE41 we unpack | |||
28437 | // and then ashr/lshr the upper bits down to the lower bits before multiply. | |||
28438 | ||||
28439 | if ((VT == MVT::v16i8 && Subtarget.hasInt256()) || | |||
28440 | (VT == MVT::v32i8 && Subtarget.canExtendTo512BW())) { | |||
28441 | MVT ExVT = MVT::getVectorVT(MVT::i16, NumElts); | |||
28442 | unsigned ExAVX = IsSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND; | |||
28443 | SDValue ExA = DAG.getNode(ExAVX, dl, ExVT, A); | |||
28444 | SDValue ExB = DAG.getNode(ExAVX, dl, ExVT, B); | |||
28445 | SDValue Mul = DAG.getNode(ISD::MUL, dl, ExVT, ExA, ExB); | |||
28446 | Mul = getTargetVShiftByConstNode(X86ISD::VSRLI, dl, ExVT, Mul, 8, DAG); | |||
28447 | return DAG.getNode(ISD::TRUNCATE, dl, VT, Mul); | |||
28448 | } | |||
28449 | ||||
28450 | return LowervXi8MulWithUNPCK(A, B, dl, VT, IsSigned, Subtarget, DAG); | |||
28451 | } | |||
28452 | ||||
28453 | // Custom lowering for SMULO/UMULO. | |||
28454 | static SDValue LowerMULO(SDValue Op, const X86Subtarget &Subtarget, | |||
28455 | SelectionDAG &DAG) { | |||
28456 | MVT VT = Op.getSimpleValueType(); | |||
28457 | ||||
28458 | // Scalars defer to LowerXALUO. | |||
28459 | if (!VT.isVector()) | |||
28460 | return LowerXALUO(Op, DAG); | |||
28461 | ||||
28462 | SDLoc dl(Op); | |||
28463 | bool IsSigned = Op->getOpcode() == ISD::SMULO; | |||
28464 | SDValue A = Op.getOperand(0); | |||
28465 | SDValue B = Op.getOperand(1); | |||
28466 | EVT OvfVT = Op->getValueType(1); | |||
28467 | ||||
28468 | if ((VT == MVT::v32i8 && !Subtarget.hasInt256()) || | |||
28469 | (VT == MVT::v64i8 && !Subtarget.hasBWI())) { | |||
28470 | // Extract the LHS Lo/Hi vectors | |||
28471 | SDValue LHSLo, LHSHi; | |||
28472 | std::tie(LHSLo, LHSHi) = splitVector(A, DAG, dl); | |||
28473 | ||||
28474 | // Extract the RHS Lo/Hi vectors | |||
28475 | SDValue RHSLo, RHSHi; | |||
28476 | std::tie(RHSLo, RHSHi) = splitVector(B, DAG, dl); | |||
28477 | ||||
28478 | EVT LoOvfVT, HiOvfVT; | |||
28479 | std::tie(LoOvfVT, HiOvfVT) = DAG.GetSplitDestVTs(OvfVT); | |||
28480 | SDVTList LoVTs = DAG.getVTList(LHSLo.getValueType(), LoOvfVT); | |||
28481 | SDVTList HiVTs = DAG.getVTList(LHSHi.getValueType(), HiOvfVT); | |||
28482 | ||||
28483 | // Issue the split operations. | |||
28484 | SDValue Lo = DAG.getNode(Op.getOpcode(), dl, LoVTs, LHSLo, RHSLo); | |||
28485 | SDValue Hi = DAG.getNode(Op.getOpcode(), dl, HiVTs, LHSHi, RHSHi); | |||
28486 | ||||
28487 | // Join the separate data results and the overflow results. | |||
28488 | SDValue Res = DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, Lo, Hi); | |||
28489 | SDValue Ovf = DAG.getNode(ISD::CONCAT_VECTORS, dl, OvfVT, Lo.getValue(1), | |||
28490 | Hi.getValue(1)); | |||
28491 | ||||
28492 | return DAG.getMergeValues({Res, Ovf}, dl); | |||
28493 | } | |||
28494 | ||||
28495 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
28496 | EVT SetccVT = | |||
28497 | TLI.getSetCCResultType(DAG.getDataLayout(), *DAG.getContext(), VT); | |||
28498 | ||||
28499 | if ((VT == MVT::v16i8 && Subtarget.hasInt256()) || | |||
28500 | (VT == MVT::v32i8 && Subtarget.canExtendTo512BW())) { | |||
28501 | unsigned NumElts = VT.getVectorNumElements(); | |||
28502 | MVT ExVT = MVT::getVectorVT(MVT::i16, NumElts); | |||
28503 | unsigned ExAVX = IsSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND; | |||
28504 | SDValue ExA = DAG.getNode(ExAVX, dl, ExVT, A); | |||
28505 | SDValue ExB = DAG.getNode(ExAVX, dl, ExVT, B); | |||
28506 | SDValue Mul = DAG.getNode(ISD::MUL, dl, ExVT, ExA, ExB); | |||
28507 | ||||
28508 | SDValue Low = DAG.getNode(ISD::TRUNCATE, dl, VT, Mul); | |||
28509 | ||||
28510 | SDValue Ovf; | |||
28511 | if (IsSigned) { | |||
28512 | SDValue High, LowSign; | |||
28513 | if (OvfVT.getVectorElementType() == MVT::i1 && | |||
28514 | (Subtarget.hasBWI() || Subtarget.canExtendTo512DQ())) { | |||
28515 | // Rather the truncating try to do the compare on vXi16 or vXi32. | |||
28516 | // Shift the high down filling with sign bits. | |||
28517 | High = getTargetVShiftByConstNode(X86ISD::VSRAI, dl, ExVT, Mul, 8, DAG); | |||
28518 | // Fill all 16 bits with the sign bit from the low. | |||
28519 | LowSign = | |||
28520 | getTargetVShiftByConstNode(X86ISD::VSHLI, dl, ExVT, Mul, 8, DAG); | |||
28521 | LowSign = getTargetVShiftByConstNode(X86ISD::VSRAI, dl, ExVT, LowSign, | |||
28522 | 15, DAG); | |||
28523 | SetccVT = OvfVT; | |||
28524 | if (!Subtarget.hasBWI()) { | |||
28525 | // We can't do a vXi16 compare so sign extend to v16i32. | |||
28526 | High = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v16i32, High); | |||
28527 | LowSign = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v16i32, LowSign); | |||
28528 | } | |||
28529 | } else { | |||
28530 | // Otherwise do the compare at vXi8. | |||
28531 | High = getTargetVShiftByConstNode(X86ISD::VSRLI, dl, ExVT, Mul, 8, DAG); | |||
28532 | High = DAG.getNode(ISD::TRUNCATE, dl, VT, High); | |||
28533 | LowSign = | |||
28534 | DAG.getNode(ISD::SRA, dl, VT, Low, DAG.getConstant(7, dl, VT)); | |||
28535 | } | |||
28536 | ||||
28537 | Ovf = DAG.getSetCC(dl, SetccVT, LowSign, High, ISD::SETNE); | |||
28538 | } else { | |||
28539 | SDValue High = | |||
28540 | getTargetVShiftByConstNode(X86ISD::VSRLI, dl, ExVT, Mul, 8, DAG); | |||
28541 | if (OvfVT.getVectorElementType() == MVT::i1 && | |||
28542 | (Subtarget.hasBWI() || Subtarget.canExtendTo512DQ())) { | |||
28543 | // Rather the truncating try to do the compare on vXi16 or vXi32. | |||
28544 | SetccVT = OvfVT; | |||
28545 | if (!Subtarget.hasBWI()) { | |||
28546 | // We can't do a vXi16 compare so sign extend to v16i32. | |||
28547 | High = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::v16i32, High); | |||
28548 | } | |||
28549 | } else { | |||
28550 | // Otherwise do the compare at vXi8. | |||
28551 | High = DAG.getNode(ISD::TRUNCATE, dl, VT, High); | |||
28552 | } | |||
28553 | ||||
28554 | Ovf = | |||
28555 | DAG.getSetCC(dl, SetccVT, High, | |||
28556 | DAG.getConstant(0, dl, High.getValueType()), ISD::SETNE); | |||
28557 | } | |||
28558 | ||||
28559 | Ovf = DAG.getSExtOrTrunc(Ovf, dl, OvfVT); | |||
28560 | ||||
28561 | return DAG.getMergeValues({Low, Ovf}, dl); | |||
28562 | } | |||
28563 | ||||
28564 | SDValue Low; | |||
28565 | SDValue High = | |||
28566 | LowervXi8MulWithUNPCK(A, B, dl, VT, IsSigned, Subtarget, DAG, &Low); | |||
28567 | ||||
28568 | SDValue Ovf; | |||
28569 | if (IsSigned) { | |||
28570 | // SMULO overflows if the high bits don't match the sign of the low. | |||
28571 | SDValue LowSign = | |||
28572 | DAG.getNode(ISD::SRA, dl, VT, Low, DAG.getConstant(7, dl, VT)); | |||
28573 | Ovf = DAG.getSetCC(dl, SetccVT, LowSign, High, ISD::SETNE); | |||
28574 | } else { | |||
28575 | // UMULO overflows if the high bits are non-zero. | |||
28576 | Ovf = | |||
28577 | DAG.getSetCC(dl, SetccVT, High, DAG.getConstant(0, dl, VT), ISD::SETNE); | |||
28578 | } | |||
28579 | ||||
28580 | Ovf = DAG.getSExtOrTrunc(Ovf, dl, OvfVT); | |||
28581 | ||||
28582 | return DAG.getMergeValues({Low, Ovf}, dl); | |||
28583 | } | |||
28584 | ||||
28585 | SDValue X86TargetLowering::LowerWin64_i128OP(SDValue Op, SelectionDAG &DAG) const { | |||
28586 | assert(Subtarget.isTargetWin64() && "Unexpected target")(static_cast <bool> (Subtarget.isTargetWin64() && "Unexpected target") ? void (0) : __assert_fail ("Subtarget.isTargetWin64() && \"Unexpected target\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 28586, __extension__ __PRETTY_FUNCTION__)); | |||
28587 | EVT VT = Op.getValueType(); | |||
28588 | assert(VT.isInteger() && VT.getSizeInBits() == 128 &&(static_cast <bool> (VT.isInteger() && VT.getSizeInBits () == 128 && "Unexpected return type for lowering") ? void (0) : __assert_fail ("VT.isInteger() && VT.getSizeInBits() == 128 && \"Unexpected return type for lowering\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 28589, __extension__ __PRETTY_FUNCTION__)) | |||
28589 | "Unexpected return type for lowering")(static_cast <bool> (VT.isInteger() && VT.getSizeInBits () == 128 && "Unexpected return type for lowering") ? void (0) : __assert_fail ("VT.isInteger() && VT.getSizeInBits() == 128 && \"Unexpected return type for lowering\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 28589, __extension__ __PRETTY_FUNCTION__)); | |||
28590 | ||||
28591 | RTLIB::Libcall LC; | |||
28592 | bool isSigned; | |||
28593 | switch (Op->getOpcode()) { | |||
28594 | default: llvm_unreachable("Unexpected request for libcall!")::llvm::llvm_unreachable_internal("Unexpected request for libcall!" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 28594); | |||
28595 | case ISD::SDIV: isSigned = true; LC = RTLIB::SDIV_I128; break; | |||
28596 | case ISD::UDIV: isSigned = false; LC = RTLIB::UDIV_I128; break; | |||
28597 | case ISD::SREM: isSigned = true; LC = RTLIB::SREM_I128; break; | |||
28598 | case ISD::UREM: isSigned = false; LC = RTLIB::UREM_I128; break; | |||
28599 | } | |||
28600 | ||||
28601 | SDLoc dl(Op); | |||
28602 | SDValue InChain = DAG.getEntryNode(); | |||
28603 | ||||
28604 | TargetLowering::ArgListTy Args; | |||
28605 | TargetLowering::ArgListEntry Entry; | |||
28606 | for (unsigned i = 0, e = Op->getNumOperands(); i != e; ++i) { | |||
28607 | EVT ArgVT = Op->getOperand(i).getValueType(); | |||
28608 | assert(ArgVT.isInteger() && ArgVT.getSizeInBits() == 128 &&(static_cast <bool> (ArgVT.isInteger() && ArgVT .getSizeInBits() == 128 && "Unexpected argument type for lowering" ) ? void (0) : __assert_fail ("ArgVT.isInteger() && ArgVT.getSizeInBits() == 128 && \"Unexpected argument type for lowering\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 28609, __extension__ __PRETTY_FUNCTION__)) | |||
28609 | "Unexpected argument type for lowering")(static_cast <bool> (ArgVT.isInteger() && ArgVT .getSizeInBits() == 128 && "Unexpected argument type for lowering" ) ? void (0) : __assert_fail ("ArgVT.isInteger() && ArgVT.getSizeInBits() == 128 && \"Unexpected argument type for lowering\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 28609, __extension__ __PRETTY_FUNCTION__)); | |||
28610 | SDValue StackPtr = DAG.CreateStackTemporary(ArgVT, 16); | |||
28611 | int SPFI = cast<FrameIndexSDNode>(StackPtr.getNode())->getIndex(); | |||
28612 | MachinePointerInfo MPI = | |||
28613 | MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), SPFI); | |||
28614 | Entry.Node = StackPtr; | |||
28615 | InChain = | |||
28616 | DAG.getStore(InChain, dl, Op->getOperand(i), StackPtr, MPI, Align(16)); | |||
28617 | Type *ArgTy = ArgVT.getTypeForEVT(*DAG.getContext()); | |||
28618 | Entry.Ty = PointerType::get(ArgTy,0); | |||
28619 | Entry.IsSExt = false; | |||
28620 | Entry.IsZExt = false; | |||
28621 | Args.push_back(Entry); | |||
28622 | } | |||
28623 | ||||
28624 | SDValue Callee = DAG.getExternalSymbol(getLibcallName(LC), | |||
28625 | getPointerTy(DAG.getDataLayout())); | |||
28626 | ||||
28627 | TargetLowering::CallLoweringInfo CLI(DAG); | |||
28628 | CLI.setDebugLoc(dl) | |||
28629 | .setChain(InChain) | |||
28630 | .setLibCallee( | |||
28631 | getLibcallCallingConv(LC), | |||
28632 | static_cast<EVT>(MVT::v2i64).getTypeForEVT(*DAG.getContext()), Callee, | |||
28633 | std::move(Args)) | |||
28634 | .setInRegister() | |||
28635 | .setSExtResult(isSigned) | |||
28636 | .setZExtResult(!isSigned); | |||
28637 | ||||
28638 | std::pair<SDValue, SDValue> CallInfo = LowerCallTo(CLI); | |||
28639 | return DAG.getBitcast(VT, CallInfo.first); | |||
28640 | } | |||
28641 | ||||
28642 | // Return true if the required (according to Opcode) shift-imm form is natively | |||
28643 | // supported by the Subtarget | |||
28644 | static bool SupportedVectorShiftWithImm(MVT VT, const X86Subtarget &Subtarget, | |||
28645 | unsigned Opcode) { | |||
28646 | if (VT.getScalarSizeInBits() < 16) | |||
28647 | return false; | |||
28648 | ||||
28649 | if (VT.is512BitVector() && Subtarget.hasAVX512() && | |||
28650 | (VT.getScalarSizeInBits() > 16 || Subtarget.hasBWI())) | |||
28651 | return true; | |||
28652 | ||||
28653 | bool LShift = (VT.is128BitVector() && Subtarget.hasSSE2()) || | |||
28654 | (VT.is256BitVector() && Subtarget.hasInt256()); | |||
28655 | ||||
28656 | bool AShift = LShift && (Subtarget.hasAVX512() || | |||
28657 | (VT != MVT::v2i64 && VT != MVT::v4i64)); | |||
28658 | return (Opcode == ISD::SRA) ? AShift : LShift; | |||
28659 | } | |||
28660 | ||||
28661 | // The shift amount is a variable, but it is the same for all vector lanes. | |||
28662 | // These instructions are defined together with shift-immediate. | |||
28663 | static | |||
28664 | bool SupportedVectorShiftWithBaseAmnt(MVT VT, const X86Subtarget &Subtarget, | |||
28665 | unsigned Opcode) { | |||
28666 | return SupportedVectorShiftWithImm(VT, Subtarget, Opcode); | |||
28667 | } | |||
28668 | ||||
28669 | // Return true if the required (according to Opcode) variable-shift form is | |||
28670 | // natively supported by the Subtarget | |||
28671 | static bool SupportedVectorVarShift(MVT VT, const X86Subtarget &Subtarget, | |||
28672 | unsigned Opcode) { | |||
28673 | ||||
28674 | if (!Subtarget.hasInt256() || VT.getScalarSizeInBits() < 16) | |||
28675 | return false; | |||
28676 | ||||
28677 | // vXi16 supported only on AVX-512, BWI | |||
28678 | if (VT.getScalarSizeInBits() == 16 && !Subtarget.hasBWI()) | |||
28679 | return false; | |||
28680 | ||||
28681 | if (Subtarget.hasAVX512()) | |||
28682 | return true; | |||
28683 | ||||
28684 | bool LShift = VT.is128BitVector() || VT.is256BitVector(); | |||
28685 | bool AShift = LShift && VT != MVT::v2i64 && VT != MVT::v4i64; | |||
28686 | return (Opcode == ISD::SRA) ? AShift : LShift; | |||
28687 | } | |||
28688 | ||||
28689 | static SDValue LowerScalarImmediateShift(SDValue Op, SelectionDAG &DAG, | |||
28690 | const X86Subtarget &Subtarget) { | |||
28691 | MVT VT = Op.getSimpleValueType(); | |||
28692 | SDLoc dl(Op); | |||
28693 | SDValue R = Op.getOperand(0); | |||
28694 | SDValue Amt = Op.getOperand(1); | |||
28695 | unsigned X86Opc = getTargetVShiftUniformOpcode(Op.getOpcode(), false); | |||
28696 | ||||
28697 | auto ArithmeticShiftRight64 = [&](uint64_t ShiftAmt) { | |||
28698 | assert((VT == MVT::v2i64 || VT == MVT::v4i64) && "Unexpected SRA type")(static_cast <bool> ((VT == MVT::v2i64 || VT == MVT::v4i64 ) && "Unexpected SRA type") ? void (0) : __assert_fail ("(VT == MVT::v2i64 || VT == MVT::v4i64) && \"Unexpected SRA type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 28698, __extension__ __PRETTY_FUNCTION__)); | |||
28699 | MVT ExVT = MVT::getVectorVT(MVT::i32, VT.getVectorNumElements() * 2); | |||
28700 | SDValue Ex = DAG.getBitcast(ExVT, R); | |||
28701 | ||||
28702 | // ashr(R, 63) === cmp_slt(R, 0) | |||
28703 | if (ShiftAmt == 63 && Subtarget.hasSSE42()) { | |||
28704 | assert((VT != MVT::v4i64 || Subtarget.hasInt256()) &&(static_cast <bool> ((VT != MVT::v4i64 || Subtarget.hasInt256 ()) && "Unsupported PCMPGT op") ? void (0) : __assert_fail ("(VT != MVT::v4i64 || Subtarget.hasInt256()) && \"Unsupported PCMPGT op\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 28705, __extension__ __PRETTY_FUNCTION__)) | |||
28705 | "Unsupported PCMPGT op")(static_cast <bool> ((VT != MVT::v4i64 || Subtarget.hasInt256 ()) && "Unsupported PCMPGT op") ? void (0) : __assert_fail ("(VT != MVT::v4i64 || Subtarget.hasInt256()) && \"Unsupported PCMPGT op\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 28705, __extension__ __PRETTY_FUNCTION__)); | |||
28706 | return DAG.getNode(X86ISD::PCMPGT, dl, VT, DAG.getConstant(0, dl, VT), R); | |||
28707 | } | |||
28708 | ||||
28709 | if (ShiftAmt >= 32) { | |||
28710 | // Splat sign to upper i32 dst, and SRA upper i32 src to lower i32. | |||
28711 | SDValue Upper = | |||
28712 | getTargetVShiftByConstNode(X86ISD::VSRAI, dl, ExVT, Ex, 31, DAG); | |||
28713 | SDValue Lower = getTargetVShiftByConstNode(X86ISD::VSRAI, dl, ExVT, Ex, | |||
28714 | ShiftAmt - 32, DAG); | |||
28715 | if (VT == MVT::v2i64) | |||
28716 | Ex = DAG.getVectorShuffle(ExVT, dl, Upper, Lower, {5, 1, 7, 3}); | |||
28717 | if (VT == MVT::v4i64) | |||
28718 | Ex = DAG.getVectorShuffle(ExVT, dl, Upper, Lower, | |||
28719 | {9, 1, 11, 3, 13, 5, 15, 7}); | |||
28720 | } else { | |||
28721 | // SRA upper i32, SRL whole i64 and select lower i32. | |||
28722 | SDValue Upper = getTargetVShiftByConstNode(X86ISD::VSRAI, dl, ExVT, Ex, | |||
28723 | ShiftAmt, DAG); | |||
28724 | SDValue Lower = | |||
28725 | getTargetVShiftByConstNode(X86ISD::VSRLI, dl, VT, R, ShiftAmt, DAG); | |||
28726 | Lower = DAG.getBitcast(ExVT, Lower); | |||
28727 | if (VT == MVT::v2i64) | |||
28728 | Ex = DAG.getVectorShuffle(ExVT, dl, Upper, Lower, {4, 1, 6, 3}); | |||
28729 | if (VT == MVT::v4i64) | |||
28730 | Ex = DAG.getVectorShuffle(ExVT, dl, Upper, Lower, | |||
28731 | {8, 1, 10, 3, 12, 5, 14, 7}); | |||
28732 | } | |||
28733 | return DAG.getBitcast(VT, Ex); | |||
28734 | }; | |||
28735 | ||||
28736 | // Optimize shl/srl/sra with constant shift amount. | |||
28737 | APInt APIntShiftAmt; | |||
28738 | if (!X86::isConstantSplat(Amt, APIntShiftAmt)) | |||
28739 | return SDValue(); | |||
28740 | ||||
28741 | // If the shift amount is out of range, return undef. | |||
28742 | if (APIntShiftAmt.uge(VT.getScalarSizeInBits())) | |||
28743 | return DAG.getUNDEF(VT); | |||
28744 | ||||
28745 | uint64_t ShiftAmt = APIntShiftAmt.getZExtValue(); | |||
28746 | ||||
28747 | if (SupportedVectorShiftWithImm(VT, Subtarget, Op.getOpcode())) | |||
28748 | return getTargetVShiftByConstNode(X86Opc, dl, VT, R, ShiftAmt, DAG); | |||
28749 | ||||
28750 | // i64 SRA needs to be performed as partial shifts. | |||
28751 | if (((!Subtarget.hasXOP() && VT == MVT::v2i64) || | |||
28752 | (Subtarget.hasInt256() && VT == MVT::v4i64)) && | |||
28753 | Op.getOpcode() == ISD::SRA) | |||
28754 | return ArithmeticShiftRight64(ShiftAmt); | |||
28755 | ||||
28756 | if (VT == MVT::v16i8 || (Subtarget.hasInt256() && VT == MVT::v32i8) || | |||
28757 | (Subtarget.hasBWI() && VT == MVT::v64i8)) { | |||
28758 | unsigned NumElts = VT.getVectorNumElements(); | |||
28759 | MVT ShiftVT = MVT::getVectorVT(MVT::i16, NumElts / 2); | |||
28760 | ||||
28761 | // Simple i8 add case | |||
28762 | if (Op.getOpcode() == ISD::SHL && ShiftAmt == 1) { | |||
28763 | // R may be undef at run-time, but (shl R, 1) must be an even number (LSB | |||
28764 | // must be 0). (add undef, undef) however can be any value. To make this | |||
28765 | // safe, we must freeze R to ensure that register allocation uses the same | |||
28766 | // register for an undefined value. This ensures that the result will | |||
28767 | // still be even and preserves the original semantics. | |||
28768 | R = DAG.getNode(ISD::FREEZE, dl, VT, R); | |||
28769 | return DAG.getNode(ISD::ADD, dl, VT, R, R); | |||
28770 | } | |||
28771 | ||||
28772 | // ashr(R, 7) === cmp_slt(R, 0) | |||
28773 | if (Op.getOpcode() == ISD::SRA && ShiftAmt == 7) { | |||
28774 | SDValue Zeros = DAG.getConstant(0, dl, VT); | |||
28775 | if (VT.is512BitVector()) { | |||
28776 | assert(VT == MVT::v64i8 && "Unexpected element type!")(static_cast <bool> (VT == MVT::v64i8 && "Unexpected element type!" ) ? void (0) : __assert_fail ("VT == MVT::v64i8 && \"Unexpected element type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 28776, __extension__ __PRETTY_FUNCTION__)); | |||
28777 | SDValue CMP = DAG.getSetCC(dl, MVT::v64i1, Zeros, R, ISD::SETGT); | |||
28778 | return DAG.getNode(ISD::SIGN_EXTEND, dl, VT, CMP); | |||
28779 | } | |||
28780 | return DAG.getNode(X86ISD::PCMPGT, dl, VT, Zeros, R); | |||
28781 | } | |||
28782 | ||||
28783 | // XOP can shift v16i8 directly instead of as shift v8i16 + mask. | |||
28784 | if (VT == MVT::v16i8 && Subtarget.hasXOP()) | |||
28785 | return SDValue(); | |||
28786 | ||||
28787 | if (Op.getOpcode() == ISD::SHL) { | |||
28788 | // Make a large shift. | |||
28789 | SDValue SHL = getTargetVShiftByConstNode(X86ISD::VSHLI, dl, ShiftVT, R, | |||
28790 | ShiftAmt, DAG); | |||
28791 | SHL = DAG.getBitcast(VT, SHL); | |||
28792 | // Zero out the rightmost bits. | |||
28793 | APInt Mask = APInt::getHighBitsSet(8, 8 - ShiftAmt); | |||
28794 | return DAG.getNode(ISD::AND, dl, VT, SHL, DAG.getConstant(Mask, dl, VT)); | |||
28795 | } | |||
28796 | if (Op.getOpcode() == ISD::SRL) { | |||
28797 | // Make a large shift. | |||
28798 | SDValue SRL = getTargetVShiftByConstNode(X86ISD::VSRLI, dl, ShiftVT, R, | |||
28799 | ShiftAmt, DAG); | |||
28800 | SRL = DAG.getBitcast(VT, SRL); | |||
28801 | // Zero out the leftmost bits. | |||
28802 | APInt Mask = APInt::getLowBitsSet(8, 8 - ShiftAmt); | |||
28803 | return DAG.getNode(ISD::AND, dl, VT, SRL, DAG.getConstant(Mask, dl, VT)); | |||
28804 | } | |||
28805 | if (Op.getOpcode() == ISD::SRA) { | |||
28806 | // ashr(R, Amt) === sub(xor(lshr(R, Amt), Mask), Mask) | |||
28807 | SDValue Res = DAG.getNode(ISD::SRL, dl, VT, R, Amt); | |||
28808 | ||||
28809 | SDValue Mask = DAG.getConstant(128 >> ShiftAmt, dl, VT); | |||
28810 | Res = DAG.getNode(ISD::XOR, dl, VT, Res, Mask); | |||
28811 | Res = DAG.getNode(ISD::SUB, dl, VT, Res, Mask); | |||
28812 | return Res; | |||
28813 | } | |||
28814 | llvm_unreachable("Unknown shift opcode.")::llvm::llvm_unreachable_internal("Unknown shift opcode.", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 28814); | |||
28815 | } | |||
28816 | ||||
28817 | return SDValue(); | |||
28818 | } | |||
28819 | ||||
28820 | static SDValue LowerScalarVariableShift(SDValue Op, SelectionDAG &DAG, | |||
28821 | const X86Subtarget &Subtarget) { | |||
28822 | MVT VT = Op.getSimpleValueType(); | |||
28823 | SDLoc dl(Op); | |||
28824 | SDValue R = Op.getOperand(0); | |||
28825 | SDValue Amt = Op.getOperand(1); | |||
28826 | unsigned Opcode = Op.getOpcode(); | |||
28827 | unsigned X86OpcI = getTargetVShiftUniformOpcode(Opcode, false); | |||
28828 | unsigned X86OpcV = getTargetVShiftUniformOpcode(Opcode, true); | |||
28829 | ||||
28830 | if (SDValue BaseShAmt = DAG.getSplatValue(Amt)) { | |||
28831 | if (SupportedVectorShiftWithBaseAmnt(VT, Subtarget, Opcode)) { | |||
28832 | MVT EltVT = VT.getVectorElementType(); | |||
28833 | assert(EltVT.bitsLE(MVT::i64) && "Unexpected element type!")(static_cast <bool> (EltVT.bitsLE(MVT::i64) && "Unexpected element type!" ) ? void (0) : __assert_fail ("EltVT.bitsLE(MVT::i64) && \"Unexpected element type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 28833, __extension__ __PRETTY_FUNCTION__)); | |||
28834 | if (EltVT != MVT::i64 && EltVT.bitsGT(MVT::i32)) | |||
28835 | BaseShAmt = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i64, BaseShAmt); | |||
28836 | else if (EltVT.bitsLT(MVT::i32)) | |||
28837 | BaseShAmt = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, BaseShAmt); | |||
28838 | ||||
28839 | return getTargetVShiftNode(X86OpcI, dl, VT, R, BaseShAmt, Subtarget, DAG); | |||
28840 | } | |||
28841 | ||||
28842 | // vXi8 shifts - shift as v8i16 + mask result. | |||
28843 | if (((VT == MVT::v16i8 && !Subtarget.canExtendTo512DQ()) || | |||
28844 | (VT == MVT::v32i8 && !Subtarget.canExtendTo512BW()) || | |||
28845 | VT == MVT::v64i8) && | |||
28846 | !Subtarget.hasXOP()) { | |||
28847 | unsigned NumElts = VT.getVectorNumElements(); | |||
28848 | MVT ExtVT = MVT::getVectorVT(MVT::i16, NumElts / 2); | |||
28849 | if (SupportedVectorShiftWithBaseAmnt(ExtVT, Subtarget, Opcode)) { | |||
28850 | unsigned LogicalOp = (Opcode == ISD::SHL ? ISD::SHL : ISD::SRL); | |||
28851 | unsigned LogicalX86Op = getTargetVShiftUniformOpcode(LogicalOp, false); | |||
28852 | BaseShAmt = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, BaseShAmt); | |||
28853 | ||||
28854 | // Create the mask using vXi16 shifts. For shift-rights we need to move | |||
28855 | // the upper byte down before splatting the vXi8 mask. | |||
28856 | SDValue BitMask = DAG.getConstant(-1, dl, ExtVT); | |||
28857 | BitMask = getTargetVShiftNode(LogicalX86Op, dl, ExtVT, BitMask, | |||
28858 | BaseShAmt, Subtarget, DAG); | |||
28859 | if (Opcode != ISD::SHL) | |||
28860 | BitMask = getTargetVShiftByConstNode(LogicalX86Op, dl, ExtVT, BitMask, | |||
28861 | 8, DAG); | |||
28862 | BitMask = DAG.getBitcast(VT, BitMask); | |||
28863 | BitMask = DAG.getVectorShuffle(VT, dl, BitMask, BitMask, | |||
28864 | SmallVector<int, 64>(NumElts, 0)); | |||
28865 | ||||
28866 | SDValue Res = getTargetVShiftNode(LogicalX86Op, dl, ExtVT, | |||
28867 | DAG.getBitcast(ExtVT, R), BaseShAmt, | |||
28868 | Subtarget, DAG); | |||
28869 | Res = DAG.getBitcast(VT, Res); | |||
28870 | Res = DAG.getNode(ISD::AND, dl, VT, Res, BitMask); | |||
28871 | ||||
28872 | if (Opcode == ISD::SRA) { | |||
28873 | // ashr(R, Amt) === sub(xor(lshr(R, Amt), SignMask), SignMask) | |||
28874 | // SignMask = lshr(SignBit, Amt) - safe to do this with PSRLW. | |||
28875 | SDValue SignMask = DAG.getConstant(0x8080, dl, ExtVT); | |||
28876 | SignMask = getTargetVShiftNode(LogicalX86Op, dl, ExtVT, SignMask, | |||
28877 | BaseShAmt, Subtarget, DAG); | |||
28878 | SignMask = DAG.getBitcast(VT, SignMask); | |||
28879 | Res = DAG.getNode(ISD::XOR, dl, VT, Res, SignMask); | |||
28880 | Res = DAG.getNode(ISD::SUB, dl, VT, Res, SignMask); | |||
28881 | } | |||
28882 | return Res; | |||
28883 | } | |||
28884 | } | |||
28885 | } | |||
28886 | ||||
28887 | // Check cases (mainly 32-bit) where i64 is expanded into high and low parts. | |||
28888 | if (VT == MVT::v2i64 && Amt.getOpcode() == ISD::BITCAST && | |||
28889 | Amt.getOperand(0).getOpcode() == ISD::BUILD_VECTOR) { | |||
28890 | Amt = Amt.getOperand(0); | |||
28891 | unsigned Ratio = 64 / Amt.getScalarValueSizeInBits(); | |||
28892 | std::vector<SDValue> Vals(Ratio); | |||
28893 | for (unsigned i = 0; i != Ratio; ++i) | |||
28894 | Vals[i] = Amt.getOperand(i); | |||
28895 | for (unsigned i = Ratio, e = Amt.getNumOperands(); i != e; i += Ratio) { | |||
28896 | for (unsigned j = 0; j != Ratio; ++j) | |||
28897 | if (Vals[j] != Amt.getOperand(i + j)) | |||
28898 | return SDValue(); | |||
28899 | } | |||
28900 | ||||
28901 | if (SupportedVectorShiftWithBaseAmnt(VT, Subtarget, Op.getOpcode())) | |||
28902 | return DAG.getNode(X86OpcV, dl, VT, R, Op.getOperand(1)); | |||
28903 | } | |||
28904 | return SDValue(); | |||
28905 | } | |||
28906 | ||||
28907 | // Convert a shift/rotate left amount to a multiplication scale factor. | |||
28908 | static SDValue convertShiftLeftToScale(SDValue Amt, const SDLoc &dl, | |||
28909 | const X86Subtarget &Subtarget, | |||
28910 | SelectionDAG &DAG) { | |||
28911 | MVT VT = Amt.getSimpleValueType(); | |||
28912 | if (!(VT == MVT::v8i16 || VT == MVT::v4i32 || | |||
28913 | (Subtarget.hasInt256() && VT == MVT::v16i16) || | |||
28914 | (Subtarget.hasVBMI2() && VT == MVT::v32i16) || | |||
28915 | (!Subtarget.hasAVX512() && VT == MVT::v16i8))) | |||
28916 | return SDValue(); | |||
28917 | ||||
28918 | if (ISD::isBuildVectorOfConstantSDNodes(Amt.getNode())) { | |||
28919 | SmallVector<SDValue, 8> Elts; | |||
28920 | MVT SVT = VT.getVectorElementType(); | |||
28921 | unsigned SVTBits = SVT.getSizeInBits(); | |||
28922 | APInt One(SVTBits, 1); | |||
28923 | unsigned NumElems = VT.getVectorNumElements(); | |||
28924 | ||||
28925 | for (unsigned i = 0; i != NumElems; ++i) { | |||
28926 | SDValue Op = Amt->getOperand(i); | |||
28927 | if (Op->isUndef()) { | |||
28928 | Elts.push_back(Op); | |||
28929 | continue; | |||
28930 | } | |||
28931 | ||||
28932 | ConstantSDNode *ND = cast<ConstantSDNode>(Op); | |||
28933 | APInt C(SVTBits, ND->getZExtValue()); | |||
28934 | uint64_t ShAmt = C.getZExtValue(); | |||
28935 | if (ShAmt >= SVTBits) { | |||
28936 | Elts.push_back(DAG.getUNDEF(SVT)); | |||
28937 | continue; | |||
28938 | } | |||
28939 | Elts.push_back(DAG.getConstant(One.shl(ShAmt), dl, SVT)); | |||
28940 | } | |||
28941 | return DAG.getBuildVector(VT, dl, Elts); | |||
28942 | } | |||
28943 | ||||
28944 | // If the target doesn't support variable shifts, use either FP conversion | |||
28945 | // or integer multiplication to avoid shifting each element individually. | |||
28946 | if (VT == MVT::v4i32) { | |||
28947 | Amt = DAG.getNode(ISD::SHL, dl, VT, Amt, DAG.getConstant(23, dl, VT)); | |||
28948 | Amt = DAG.getNode(ISD::ADD, dl, VT, Amt, | |||
28949 | DAG.getConstant(0x3f800000U, dl, VT)); | |||
28950 | Amt = DAG.getBitcast(MVT::v4f32, Amt); | |||
28951 | return DAG.getNode(ISD::FP_TO_SINT, dl, VT, Amt); | |||
28952 | } | |||
28953 | ||||
28954 | // AVX2 can more effectively perform this as a zext/trunc to/from v8i32. | |||
28955 | if (VT == MVT::v8i16 && !Subtarget.hasAVX2()) { | |||
28956 | SDValue Z = DAG.getConstant(0, dl, VT); | |||
28957 | SDValue Lo = DAG.getBitcast(MVT::v4i32, getUnpackl(DAG, dl, VT, Amt, Z)); | |||
28958 | SDValue Hi = DAG.getBitcast(MVT::v4i32, getUnpackh(DAG, dl, VT, Amt, Z)); | |||
28959 | Lo = convertShiftLeftToScale(Lo, dl, Subtarget, DAG); | |||
28960 | Hi = convertShiftLeftToScale(Hi, dl, Subtarget, DAG); | |||
28961 | if (Subtarget.hasSSE41()) | |||
28962 | return DAG.getNode(X86ISD::PACKUS, dl, VT, Lo, Hi); | |||
28963 | ||||
28964 | return DAG.getVectorShuffle(VT, dl, DAG.getBitcast(VT, Lo), | |||
28965 | DAG.getBitcast(VT, Hi), | |||
28966 | {0, 2, 4, 6, 8, 10, 12, 14}); | |||
28967 | } | |||
28968 | ||||
28969 | return SDValue(); | |||
28970 | } | |||
28971 | ||||
28972 | static SDValue LowerShift(SDValue Op, const X86Subtarget &Subtarget, | |||
28973 | SelectionDAG &DAG) { | |||
28974 | MVT VT = Op.getSimpleValueType(); | |||
28975 | SDLoc dl(Op); | |||
28976 | SDValue R = Op.getOperand(0); | |||
28977 | SDValue Amt = Op.getOperand(1); | |||
28978 | unsigned EltSizeInBits = VT.getScalarSizeInBits(); | |||
28979 | bool ConstantAmt = ISD::isBuildVectorOfConstantSDNodes(Amt.getNode()); | |||
28980 | ||||
28981 | unsigned Opc = Op.getOpcode(); | |||
28982 | unsigned X86OpcV = getTargetVShiftUniformOpcode(Opc, true); | |||
28983 | unsigned X86OpcI = getTargetVShiftUniformOpcode(Opc, false); | |||
28984 | ||||
28985 | assert(VT.isVector() && "Custom lowering only for vector shifts!")(static_cast <bool> (VT.isVector() && "Custom lowering only for vector shifts!" ) ? void (0) : __assert_fail ("VT.isVector() && \"Custom lowering only for vector shifts!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 28985, __extension__ __PRETTY_FUNCTION__)); | |||
28986 | assert(Subtarget.hasSSE2() && "Only custom lower when we have SSE2!")(static_cast <bool> (Subtarget.hasSSE2() && "Only custom lower when we have SSE2!" ) ? void (0) : __assert_fail ("Subtarget.hasSSE2() && \"Only custom lower when we have SSE2!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 28986, __extension__ __PRETTY_FUNCTION__)); | |||
28987 | ||||
28988 | if (SDValue V = LowerScalarImmediateShift(Op, DAG, Subtarget)) | |||
28989 | return V; | |||
28990 | ||||
28991 | if (SDValue V = LowerScalarVariableShift(Op, DAG, Subtarget)) | |||
28992 | return V; | |||
28993 | ||||
28994 | if (SupportedVectorVarShift(VT, Subtarget, Opc)) | |||
28995 | return Op; | |||
28996 | ||||
28997 | // XOP has 128-bit variable logical/arithmetic shifts. | |||
28998 | // +ve/-ve Amt = shift left/right. | |||
28999 | if (Subtarget.hasXOP() && (VT == MVT::v2i64 || VT == MVT::v4i32 || | |||
29000 | VT == MVT::v8i16 || VT == MVT::v16i8)) { | |||
29001 | if (Opc == ISD::SRL || Opc == ISD::SRA) { | |||
29002 | SDValue Zero = DAG.getConstant(0, dl, VT); | |||
29003 | Amt = DAG.getNode(ISD::SUB, dl, VT, Zero, Amt); | |||
29004 | } | |||
29005 | if (Opc == ISD::SHL || Opc == ISD::SRL) | |||
29006 | return DAG.getNode(X86ISD::VPSHL, dl, VT, R, Amt); | |||
29007 | if (Opc == ISD::SRA) | |||
29008 | return DAG.getNode(X86ISD::VPSHA, dl, VT, R, Amt); | |||
29009 | } | |||
29010 | ||||
29011 | // 2i64 vector logical shifts can efficiently avoid scalarization - do the | |||
29012 | // shifts per-lane and then shuffle the partial results back together. | |||
29013 | if (VT == MVT::v2i64 && Opc != ISD::SRA) { | |||
29014 | // Splat the shift amounts so the scalar shifts above will catch it. | |||
29015 | SDValue Amt0 = DAG.getVectorShuffle(VT, dl, Amt, Amt, {0, 0}); | |||
29016 | SDValue Amt1 = DAG.getVectorShuffle(VT, dl, Amt, Amt, {1, 1}); | |||
29017 | SDValue R0 = DAG.getNode(Opc, dl, VT, R, Amt0); | |||
29018 | SDValue R1 = DAG.getNode(Opc, dl, VT, R, Amt1); | |||
29019 | return DAG.getVectorShuffle(VT, dl, R0, R1, {0, 3}); | |||
29020 | } | |||
29021 | ||||
29022 | // i64 vector arithmetic shift can be emulated with the transform: | |||
29023 | // M = lshr(SIGN_MASK, Amt) | |||
29024 | // ashr(R, Amt) === sub(xor(lshr(R, Amt), M), M) | |||
29025 | if ((VT == MVT::v2i64 || (VT == MVT::v4i64 && Subtarget.hasInt256())) && | |||
29026 | Opc == ISD::SRA) { | |||
29027 | SDValue S = DAG.getConstant(APInt::getSignMask(64), dl, VT); | |||
29028 | SDValue M = DAG.getNode(ISD::SRL, dl, VT, S, Amt); | |||
29029 | R = DAG.getNode(ISD::SRL, dl, VT, R, Amt); | |||
29030 | R = DAG.getNode(ISD::XOR, dl, VT, R, M); | |||
29031 | R = DAG.getNode(ISD::SUB, dl, VT, R, M); | |||
29032 | return R; | |||
29033 | } | |||
29034 | ||||
29035 | // If possible, lower this shift as a sequence of two shifts by | |||
29036 | // constant plus a BLENDing shuffle instead of scalarizing it. | |||
29037 | // Example: | |||
29038 | // (v4i32 (srl A, (build_vector < X, Y, Y, Y>))) | |||
29039 | // | |||
29040 | // Could be rewritten as: | |||
29041 | // (v4i32 (MOVSS (srl A, <Y,Y,Y,Y>), (srl A, <X,X,X,X>))) | |||
29042 | // | |||
29043 | // The advantage is that the two shifts from the example would be | |||
29044 | // lowered as X86ISD::VSRLI nodes in parallel before blending. | |||
29045 | if (ConstantAmt && (VT == MVT::v8i16 || VT == MVT::v4i32 || | |||
29046 | (VT == MVT::v16i16 && Subtarget.hasInt256()))) { | |||
29047 | SDValue Amt1, Amt2; | |||
29048 | unsigned NumElts = VT.getVectorNumElements(); | |||
29049 | SmallVector<int, 8> ShuffleMask; | |||
29050 | for (unsigned i = 0; i != NumElts; ++i) { | |||
29051 | SDValue A = Amt->getOperand(i); | |||
29052 | if (A.isUndef()) { | |||
29053 | ShuffleMask.push_back(SM_SentinelUndef); | |||
29054 | continue; | |||
29055 | } | |||
29056 | if (!Amt1 || Amt1 == A) { | |||
29057 | ShuffleMask.push_back(i); | |||
29058 | Amt1 = A; | |||
29059 | continue; | |||
29060 | } | |||
29061 | if (!Amt2 || Amt2 == A) { | |||
29062 | ShuffleMask.push_back(i + NumElts); | |||
29063 | Amt2 = A; | |||
29064 | continue; | |||
29065 | } | |||
29066 | break; | |||
29067 | } | |||
29068 | ||||
29069 | // Only perform this blend if we can perform it without loading a mask. | |||
29070 | if (ShuffleMask.size() == NumElts && Amt1 && Amt2 && | |||
29071 | (VT != MVT::v16i16 || | |||
29072 | is128BitLaneRepeatedShuffleMask(VT, ShuffleMask)) && | |||
29073 | (VT == MVT::v4i32 || Subtarget.hasSSE41() || Opc != ISD::SHL || | |||
29074 | canWidenShuffleElements(ShuffleMask))) { | |||
29075 | auto *Cst1 = dyn_cast<ConstantSDNode>(Amt1); | |||
29076 | auto *Cst2 = dyn_cast<ConstantSDNode>(Amt2); | |||
29077 | if (Cst1 && Cst2 && Cst1->getAPIntValue().ult(EltSizeInBits) && | |||
29078 | Cst2->getAPIntValue().ult(EltSizeInBits)) { | |||
29079 | SDValue Shift1 = getTargetVShiftByConstNode(X86OpcI, dl, VT, R, | |||
29080 | Cst1->getZExtValue(), DAG); | |||
29081 | SDValue Shift2 = getTargetVShiftByConstNode(X86OpcI, dl, VT, R, | |||
29082 | Cst2->getZExtValue(), DAG); | |||
29083 | return DAG.getVectorShuffle(VT, dl, Shift1, Shift2, ShuffleMask); | |||
29084 | } | |||
29085 | } | |||
29086 | } | |||
29087 | ||||
29088 | // If possible, lower this packed shift into a vector multiply instead of | |||
29089 | // expanding it into a sequence of scalar shifts. | |||
29090 | if (Opc == ISD::SHL) | |||
29091 | if (SDValue Scale = convertShiftLeftToScale(Amt, dl, Subtarget, DAG)) | |||
29092 | return DAG.getNode(ISD::MUL, dl, VT, R, Scale); | |||
29093 | ||||
29094 | // Constant ISD::SRL can be performed efficiently on vXi16 vectors as we | |||
29095 | // can replace with ISD::MULHU, creating scale factor from (NumEltBits - Amt). | |||
29096 | if (Opc == ISD::SRL && ConstantAmt && | |||
29097 | (VT == MVT::v8i16 || (VT == MVT::v16i16 && Subtarget.hasInt256()))) { | |||
29098 | SDValue EltBits = DAG.getConstant(EltSizeInBits, dl, VT); | |||
29099 | SDValue RAmt = DAG.getNode(ISD::SUB, dl, VT, EltBits, Amt); | |||
29100 | if (SDValue Scale = convertShiftLeftToScale(RAmt, dl, Subtarget, DAG)) { | |||
29101 | SDValue Zero = DAG.getConstant(0, dl, VT); | |||
29102 | SDValue ZAmt = DAG.getSetCC(dl, VT, Amt, Zero, ISD::SETEQ); | |||
29103 | SDValue Res = DAG.getNode(ISD::MULHU, dl, VT, R, Scale); | |||
29104 | return DAG.getSelect(dl, VT, ZAmt, R, Res); | |||
29105 | } | |||
29106 | } | |||
29107 | ||||
29108 | // Constant ISD::SRA can be performed efficiently on vXi16 vectors as we | |||
29109 | // can replace with ISD::MULHS, creating scale factor from (NumEltBits - Amt). | |||
29110 | // TODO: Special case handling for shift by 0/1, really we can afford either | |||
29111 | // of these cases in pre-SSE41/XOP/AVX512 but not both. | |||
29112 | if (Opc == ISD::SRA && ConstantAmt && | |||
29113 | (VT == MVT::v8i16 || (VT == MVT::v16i16 && Subtarget.hasInt256())) && | |||
29114 | ((Subtarget.hasSSE41() && !Subtarget.hasXOP() && | |||
29115 | !Subtarget.hasAVX512()) || | |||
29116 | DAG.isKnownNeverZero(Amt))) { | |||
29117 | SDValue EltBits = DAG.getConstant(EltSizeInBits, dl, VT); | |||
29118 | SDValue RAmt = DAG.getNode(ISD::SUB, dl, VT, EltBits, Amt); | |||
29119 | if (SDValue Scale = convertShiftLeftToScale(RAmt, dl, Subtarget, DAG)) { | |||
29120 | SDValue Amt0 = | |||
29121 | DAG.getSetCC(dl, VT, Amt, DAG.getConstant(0, dl, VT), ISD::SETEQ); | |||
29122 | SDValue Amt1 = | |||
29123 | DAG.getSetCC(dl, VT, Amt, DAG.getConstant(1, dl, VT), ISD::SETEQ); | |||
29124 | SDValue Sra1 = | |||
29125 | getTargetVShiftByConstNode(X86ISD::VSRAI, dl, VT, R, 1, DAG); | |||
29126 | SDValue Res = DAG.getNode(ISD::MULHS, dl, VT, R, Scale); | |||
29127 | Res = DAG.getSelect(dl, VT, Amt0, R, Res); | |||
29128 | return DAG.getSelect(dl, VT, Amt1, Sra1, Res); | |||
29129 | } | |||
29130 | } | |||
29131 | ||||
29132 | // v4i32 Non Uniform Shifts. | |||
29133 | // If the shift amount is constant we can shift each lane using the SSE2 | |||
29134 | // immediate shifts, else we need to zero-extend each lane to the lower i64 | |||
29135 | // and shift using the SSE2 variable shifts. | |||
29136 | // The separate results can then be blended together. | |||
29137 | if (VT == MVT::v4i32) { | |||
29138 | SDValue Amt0, Amt1, Amt2, Amt3; | |||
29139 | if (ConstantAmt) { | |||
29140 | Amt0 = DAG.getVectorShuffle(VT, dl, Amt, DAG.getUNDEF(VT), {0, 0, 0, 0}); | |||
29141 | Amt1 = DAG.getVectorShuffle(VT, dl, Amt, DAG.getUNDEF(VT), {1, 1, 1, 1}); | |||
29142 | Amt2 = DAG.getVectorShuffle(VT, dl, Amt, DAG.getUNDEF(VT), {2, 2, 2, 2}); | |||
29143 | Amt3 = DAG.getVectorShuffle(VT, dl, Amt, DAG.getUNDEF(VT), {3, 3, 3, 3}); | |||
29144 | } else { | |||
29145 | // The SSE2 shifts use the lower i64 as the same shift amount for | |||
29146 | // all lanes and the upper i64 is ignored. On AVX we're better off | |||
29147 | // just zero-extending, but for SSE just duplicating the top 16-bits is | |||
29148 | // cheaper and has the same effect for out of range values. | |||
29149 | if (Subtarget.hasAVX()) { | |||
29150 | SDValue Z = DAG.getConstant(0, dl, VT); | |||
29151 | Amt0 = DAG.getVectorShuffle(VT, dl, Amt, Z, {0, 4, -1, -1}); | |||
29152 | Amt1 = DAG.getVectorShuffle(VT, dl, Amt, Z, {1, 5, -1, -1}); | |||
29153 | Amt2 = DAG.getVectorShuffle(VT, dl, Amt, Z, {2, 6, -1, -1}); | |||
29154 | Amt3 = DAG.getVectorShuffle(VT, dl, Amt, Z, {3, 7, -1, -1}); | |||
29155 | } else { | |||
29156 | SDValue Amt01 = DAG.getBitcast(MVT::v8i16, Amt); | |||
29157 | SDValue Amt23 = DAG.getVectorShuffle(MVT::v8i16, dl, Amt01, Amt01, | |||
29158 | {4, 5, 6, 7, -1, -1, -1, -1}); | |||
29159 | Amt0 = DAG.getVectorShuffle(MVT::v8i16, dl, Amt01, Amt01, | |||
29160 | {0, 1, 1, 1, -1, -1, -1, -1}); | |||
29161 | Amt1 = DAG.getVectorShuffle(MVT::v8i16, dl, Amt01, Amt01, | |||
29162 | {2, 3, 3, 3, -1, -1, -1, -1}); | |||
29163 | Amt2 = DAG.getVectorShuffle(MVT::v8i16, dl, Amt23, Amt23, | |||
29164 | {0, 1, 1, 1, -1, -1, -1, -1}); | |||
29165 | Amt3 = DAG.getVectorShuffle(MVT::v8i16, dl, Amt23, Amt23, | |||
29166 | {2, 3, 3, 3, -1, -1, -1, -1}); | |||
29167 | } | |||
29168 | } | |||
29169 | ||||
29170 | unsigned ShOpc = ConstantAmt ? Opc : X86OpcV; | |||
29171 | SDValue R0 = DAG.getNode(ShOpc, dl, VT, R, DAG.getBitcast(VT, Amt0)); | |||
29172 | SDValue R1 = DAG.getNode(ShOpc, dl, VT, R, DAG.getBitcast(VT, Amt1)); | |||
29173 | SDValue R2 = DAG.getNode(ShOpc, dl, VT, R, DAG.getBitcast(VT, Amt2)); | |||
29174 | SDValue R3 = DAG.getNode(ShOpc, dl, VT, R, DAG.getBitcast(VT, Amt3)); | |||
29175 | ||||
29176 | // Merge the shifted lane results optimally with/without PBLENDW. | |||
29177 | // TODO - ideally shuffle combining would handle this. | |||
29178 | if (Subtarget.hasSSE41()) { | |||
29179 | SDValue R02 = DAG.getVectorShuffle(VT, dl, R0, R2, {0, -1, 6, -1}); | |||
29180 | SDValue R13 = DAG.getVectorShuffle(VT, dl, R1, R3, {-1, 1, -1, 7}); | |||
29181 | return DAG.getVectorShuffle(VT, dl, R02, R13, {0, 5, 2, 7}); | |||
29182 | } | |||
29183 | SDValue R01 = DAG.getVectorShuffle(VT, dl, R0, R1, {0, -1, -1, 5}); | |||
29184 | SDValue R23 = DAG.getVectorShuffle(VT, dl, R2, R3, {2, -1, -1, 7}); | |||
29185 | return DAG.getVectorShuffle(VT, dl, R01, R23, {0, 3, 4, 7}); | |||
29186 | } | |||
29187 | ||||
29188 | // It's worth extending once and using the vXi16/vXi32 shifts for smaller | |||
29189 | // types, but without AVX512 the extra overheads to get from vXi8 to vXi32 | |||
29190 | // make the existing SSE solution better. | |||
29191 | // NOTE: We honor prefered vector width before promoting to 512-bits. | |||
29192 | if ((Subtarget.hasInt256() && VT == MVT::v8i16) || | |||
29193 | (Subtarget.canExtendTo512DQ() && VT == MVT::v16i16) || | |||
29194 | (Subtarget.canExtendTo512DQ() && VT == MVT::v16i8) || | |||
29195 | (Subtarget.canExtendTo512BW() && VT == MVT::v32i8) || | |||
29196 | (Subtarget.hasBWI() && Subtarget.hasVLX() && VT == MVT::v16i8)) { | |||
29197 | assert((!Subtarget.hasBWI() || VT == MVT::v32i8 || VT == MVT::v16i8) &&(static_cast <bool> ((!Subtarget.hasBWI() || VT == MVT:: v32i8 || VT == MVT::v16i8) && "Unexpected vector type" ) ? void (0) : __assert_fail ("(!Subtarget.hasBWI() || VT == MVT::v32i8 || VT == MVT::v16i8) && \"Unexpected vector type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 29198, __extension__ __PRETTY_FUNCTION__)) | |||
29198 | "Unexpected vector type")(static_cast <bool> ((!Subtarget.hasBWI() || VT == MVT:: v32i8 || VT == MVT::v16i8) && "Unexpected vector type" ) ? void (0) : __assert_fail ("(!Subtarget.hasBWI() || VT == MVT::v32i8 || VT == MVT::v16i8) && \"Unexpected vector type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 29198, __extension__ __PRETTY_FUNCTION__)); | |||
29199 | MVT EvtSVT = Subtarget.hasBWI() ? MVT::i16 : MVT::i32; | |||
29200 | MVT ExtVT = MVT::getVectorVT(EvtSVT, VT.getVectorNumElements()); | |||
29201 | unsigned ExtOpc = Opc == ISD::SRA ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND; | |||
29202 | R = DAG.getNode(ExtOpc, dl, ExtVT, R); | |||
29203 | Amt = DAG.getNode(ISD::ZERO_EXTEND, dl, ExtVT, Amt); | |||
29204 | return DAG.getNode(ISD::TRUNCATE, dl, VT, | |||
29205 | DAG.getNode(Opc, dl, ExtVT, R, Amt)); | |||
29206 | } | |||
29207 | ||||
29208 | // Constant ISD::SRA/SRL can be performed efficiently on vXi8 vectors as we | |||
29209 | // extend to vXi16 to perform a MUL scale effectively as a MUL_LOHI. | |||
29210 | if (ConstantAmt && (Opc == ISD::SRA || Opc == ISD::SRL) && | |||
29211 | (VT == MVT::v16i8 || (VT == MVT::v32i8 && Subtarget.hasInt256()) || | |||
29212 | (VT == MVT::v64i8 && Subtarget.hasBWI())) && | |||
29213 | !Subtarget.hasXOP()) { | |||
29214 | int NumElts = VT.getVectorNumElements(); | |||
29215 | SDValue Cst8 = DAG.getTargetConstant(8, dl, MVT::i8); | |||
29216 | ||||
29217 | // Extend constant shift amount to vXi16 (it doesn't matter if the type | |||
29218 | // isn't legal). | |||
29219 | MVT ExVT = MVT::getVectorVT(MVT::i16, NumElts); | |||
29220 | Amt = DAG.getZExtOrTrunc(Amt, dl, ExVT); | |||
29221 | Amt = DAG.getNode(ISD::SUB, dl, ExVT, DAG.getConstant(8, dl, ExVT), Amt); | |||
29222 | Amt = DAG.getNode(ISD::SHL, dl, ExVT, DAG.getConstant(1, dl, ExVT), Amt); | |||
29223 | assert(ISD::isBuildVectorOfConstantSDNodes(Amt.getNode()) &&(static_cast <bool> (ISD::isBuildVectorOfConstantSDNodes (Amt.getNode()) && "Constant build vector expected") ? void (0) : __assert_fail ("ISD::isBuildVectorOfConstantSDNodes(Amt.getNode()) && \"Constant build vector expected\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 29224, __extension__ __PRETTY_FUNCTION__)) | |||
29224 | "Constant build vector expected")(static_cast <bool> (ISD::isBuildVectorOfConstantSDNodes (Amt.getNode()) && "Constant build vector expected") ? void (0) : __assert_fail ("ISD::isBuildVectorOfConstantSDNodes(Amt.getNode()) && \"Constant build vector expected\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 29224, __extension__ __PRETTY_FUNCTION__)); | |||
29225 | ||||
29226 | if (VT == MVT::v16i8 && Subtarget.hasInt256()) { | |||
29227 | R = Opc == ISD::SRA ? DAG.getSExtOrTrunc(R, dl, ExVT) | |||
29228 | : DAG.getZExtOrTrunc(R, dl, ExVT); | |||
29229 | R = DAG.getNode(ISD::MUL, dl, ExVT, R, Amt); | |||
29230 | R = DAG.getNode(X86ISD::VSRLI, dl, ExVT, R, Cst8); | |||
29231 | return DAG.getZExtOrTrunc(R, dl, VT); | |||
29232 | } | |||
29233 | ||||
29234 | SmallVector<SDValue, 16> LoAmt, HiAmt; | |||
29235 | for (int i = 0; i != NumElts; i += 16) { | |||
29236 | for (int j = 0; j != 8; ++j) { | |||
29237 | LoAmt.push_back(Amt.getOperand(i + j)); | |||
29238 | HiAmt.push_back(Amt.getOperand(i + j + 8)); | |||
29239 | } | |||
29240 | } | |||
29241 | ||||
29242 | MVT VT16 = MVT::getVectorVT(MVT::i16, NumElts / 2); | |||
29243 | SDValue LoA = DAG.getBuildVector(VT16, dl, LoAmt); | |||
29244 | SDValue HiA = DAG.getBuildVector(VT16, dl, HiAmt); | |||
29245 | ||||
29246 | SDValue LoR = DAG.getBitcast(VT16, getUnpackl(DAG, dl, VT, R, R)); | |||
29247 | SDValue HiR = DAG.getBitcast(VT16, getUnpackh(DAG, dl, VT, R, R)); | |||
29248 | LoR = DAG.getNode(X86OpcI, dl, VT16, LoR, Cst8); | |||
29249 | HiR = DAG.getNode(X86OpcI, dl, VT16, HiR, Cst8); | |||
29250 | LoR = DAG.getNode(ISD::MUL, dl, VT16, LoR, LoA); | |||
29251 | HiR = DAG.getNode(ISD::MUL, dl, VT16, HiR, HiA); | |||
29252 | LoR = DAG.getNode(X86ISD::VSRLI, dl, VT16, LoR, Cst8); | |||
29253 | HiR = DAG.getNode(X86ISD::VSRLI, dl, VT16, HiR, Cst8); | |||
29254 | return DAG.getNode(X86ISD::PACKUS, dl, VT, LoR, HiR); | |||
29255 | } | |||
29256 | ||||
29257 | if (VT == MVT::v16i8 || | |||
29258 | (VT == MVT::v32i8 && Subtarget.hasInt256() && !Subtarget.hasXOP()) || | |||
29259 | (VT == MVT::v64i8 && Subtarget.hasBWI())) { | |||
29260 | MVT ExtVT = MVT::getVectorVT(MVT::i16, VT.getVectorNumElements() / 2); | |||
29261 | ||||
29262 | auto SignBitSelect = [&](MVT SelVT, SDValue Sel, SDValue V0, SDValue V1) { | |||
29263 | if (VT.is512BitVector()) { | |||
29264 | // On AVX512BW targets we make use of the fact that VSELECT lowers | |||
29265 | // to a masked blend which selects bytes based just on the sign bit | |||
29266 | // extracted to a mask. | |||
29267 | MVT MaskVT = MVT::getVectorVT(MVT::i1, VT.getVectorNumElements()); | |||
29268 | V0 = DAG.getBitcast(VT, V0); | |||
29269 | V1 = DAG.getBitcast(VT, V1); | |||
29270 | Sel = DAG.getBitcast(VT, Sel); | |||
29271 | Sel = DAG.getSetCC(dl, MaskVT, DAG.getConstant(0, dl, VT), Sel, | |||
29272 | ISD::SETGT); | |||
29273 | return DAG.getBitcast(SelVT, DAG.getSelect(dl, VT, Sel, V0, V1)); | |||
29274 | } else if (Subtarget.hasSSE41()) { | |||
29275 | // On SSE41 targets we can use PBLENDVB which selects bytes based just | |||
29276 | // on the sign bit. | |||
29277 | V0 = DAG.getBitcast(VT, V0); | |||
29278 | V1 = DAG.getBitcast(VT, V1); | |||
29279 | Sel = DAG.getBitcast(VT, Sel); | |||
29280 | return DAG.getBitcast(SelVT, | |||
29281 | DAG.getNode(X86ISD::BLENDV, dl, VT, Sel, V0, V1)); | |||
29282 | } | |||
29283 | // On pre-SSE41 targets we test for the sign bit by comparing to | |||
29284 | // zero - a negative value will set all bits of the lanes to true | |||
29285 | // and VSELECT uses that in its OR(AND(V0,C),AND(V1,~C)) lowering. | |||
29286 | SDValue Z = DAG.getConstant(0, dl, SelVT); | |||
29287 | SDValue C = DAG.getNode(X86ISD::PCMPGT, dl, SelVT, Z, Sel); | |||
29288 | return DAG.getSelect(dl, SelVT, C, V0, V1); | |||
29289 | }; | |||
29290 | ||||
29291 | // Turn 'a' into a mask suitable for VSELECT: a = a << 5; | |||
29292 | // We can safely do this using i16 shifts as we're only interested in | |||
29293 | // the 3 lower bits of each byte. | |||
29294 | Amt = DAG.getBitcast(ExtVT, Amt); | |||
29295 | Amt = getTargetVShiftByConstNode(X86ISD::VSHLI, dl, ExtVT, Amt, 5, DAG); | |||
29296 | Amt = DAG.getBitcast(VT, Amt); | |||
29297 | ||||
29298 | if (Opc == ISD::SHL || Opc == ISD::SRL) { | |||
29299 | // r = VSELECT(r, shift(r, 4), a); | |||
29300 | SDValue M = DAG.getNode(Opc, dl, VT, R, DAG.getConstant(4, dl, VT)); | |||
29301 | R = SignBitSelect(VT, Amt, M, R); | |||
29302 | ||||
29303 | // a += a | |||
29304 | Amt = DAG.getNode(ISD::ADD, dl, VT, Amt, Amt); | |||
29305 | ||||
29306 | // r = VSELECT(r, shift(r, 2), a); | |||
29307 | M = DAG.getNode(Opc, dl, VT, R, DAG.getConstant(2, dl, VT)); | |||
29308 | R = SignBitSelect(VT, Amt, M, R); | |||
29309 | ||||
29310 | // a += a | |||
29311 | Amt = DAG.getNode(ISD::ADD, dl, VT, Amt, Amt); | |||
29312 | ||||
29313 | // return VSELECT(r, shift(r, 1), a); | |||
29314 | M = DAG.getNode(Opc, dl, VT, R, DAG.getConstant(1, dl, VT)); | |||
29315 | R = SignBitSelect(VT, Amt, M, R); | |||
29316 | return R; | |||
29317 | } | |||
29318 | ||||
29319 | if (Opc == ISD::SRA) { | |||
29320 | // For SRA we need to unpack each byte to the higher byte of a i16 vector | |||
29321 | // so we can correctly sign extend. We don't care what happens to the | |||
29322 | // lower byte. | |||
29323 | SDValue ALo = getUnpackl(DAG, dl, VT, DAG.getUNDEF(VT), Amt); | |||
29324 | SDValue AHi = getUnpackh(DAG, dl, VT, DAG.getUNDEF(VT), Amt); | |||
29325 | SDValue RLo = getUnpackl(DAG, dl, VT, DAG.getUNDEF(VT), R); | |||
29326 | SDValue RHi = getUnpackh(DAG, dl, VT, DAG.getUNDEF(VT), R); | |||
29327 | ALo = DAG.getBitcast(ExtVT, ALo); | |||
29328 | AHi = DAG.getBitcast(ExtVT, AHi); | |||
29329 | RLo = DAG.getBitcast(ExtVT, RLo); | |||
29330 | RHi = DAG.getBitcast(ExtVT, RHi); | |||
29331 | ||||
29332 | // r = VSELECT(r, shift(r, 4), a); | |||
29333 | SDValue MLo = getTargetVShiftByConstNode(X86OpcI, dl, ExtVT, RLo, 4, DAG); | |||
29334 | SDValue MHi = getTargetVShiftByConstNode(X86OpcI, dl, ExtVT, RHi, 4, DAG); | |||
29335 | RLo = SignBitSelect(ExtVT, ALo, MLo, RLo); | |||
29336 | RHi = SignBitSelect(ExtVT, AHi, MHi, RHi); | |||
29337 | ||||
29338 | // a += a | |||
29339 | ALo = DAG.getNode(ISD::ADD, dl, ExtVT, ALo, ALo); | |||
29340 | AHi = DAG.getNode(ISD::ADD, dl, ExtVT, AHi, AHi); | |||
29341 | ||||
29342 | // r = VSELECT(r, shift(r, 2), a); | |||
29343 | MLo = getTargetVShiftByConstNode(X86OpcI, dl, ExtVT, RLo, 2, DAG); | |||
29344 | MHi = getTargetVShiftByConstNode(X86OpcI, dl, ExtVT, RHi, 2, DAG); | |||
29345 | RLo = SignBitSelect(ExtVT, ALo, MLo, RLo); | |||
29346 | RHi = SignBitSelect(ExtVT, AHi, MHi, RHi); | |||
29347 | ||||
29348 | // a += a | |||
29349 | ALo = DAG.getNode(ISD::ADD, dl, ExtVT, ALo, ALo); | |||
29350 | AHi = DAG.getNode(ISD::ADD, dl, ExtVT, AHi, AHi); | |||
29351 | ||||
29352 | // r = VSELECT(r, shift(r, 1), a); | |||
29353 | MLo = getTargetVShiftByConstNode(X86OpcI, dl, ExtVT, RLo, 1, DAG); | |||
29354 | MHi = getTargetVShiftByConstNode(X86OpcI, dl, ExtVT, RHi, 1, DAG); | |||
29355 | RLo = SignBitSelect(ExtVT, ALo, MLo, RLo); | |||
29356 | RHi = SignBitSelect(ExtVT, AHi, MHi, RHi); | |||
29357 | ||||
29358 | // Logical shift the result back to the lower byte, leaving a zero upper | |||
29359 | // byte meaning that we can safely pack with PACKUSWB. | |||
29360 | RLo = getTargetVShiftByConstNode(X86ISD::VSRLI, dl, ExtVT, RLo, 8, DAG); | |||
29361 | RHi = getTargetVShiftByConstNode(X86ISD::VSRLI, dl, ExtVT, RHi, 8, DAG); | |||
29362 | return DAG.getNode(X86ISD::PACKUS, dl, VT, RLo, RHi); | |||
29363 | } | |||
29364 | } | |||
29365 | ||||
29366 | if (Subtarget.hasInt256() && !Subtarget.hasXOP() && VT == MVT::v16i16) { | |||
29367 | MVT ExtVT = MVT::v8i32; | |||
29368 | SDValue Z = DAG.getConstant(0, dl, VT); | |||
29369 | SDValue ALo = getUnpackl(DAG, dl, VT, Amt, Z); | |||
29370 | SDValue AHi = getUnpackh(DAG, dl, VT, Amt, Z); | |||
29371 | SDValue RLo = getUnpackl(DAG, dl, VT, Z, R); | |||
29372 | SDValue RHi = getUnpackh(DAG, dl, VT, Z, R); | |||
29373 | ALo = DAG.getBitcast(ExtVT, ALo); | |||
29374 | AHi = DAG.getBitcast(ExtVT, AHi); | |||
29375 | RLo = DAG.getBitcast(ExtVT, RLo); | |||
29376 | RHi = DAG.getBitcast(ExtVT, RHi); | |||
29377 | SDValue Lo = DAG.getNode(Opc, dl, ExtVT, RLo, ALo); | |||
29378 | SDValue Hi = DAG.getNode(Opc, dl, ExtVT, RHi, AHi); | |||
29379 | Lo = getTargetVShiftByConstNode(X86ISD::VSRLI, dl, ExtVT, Lo, 16, DAG); | |||
29380 | Hi = getTargetVShiftByConstNode(X86ISD::VSRLI, dl, ExtVT, Hi, 16, DAG); | |||
29381 | return DAG.getNode(X86ISD::PACKUS, dl, VT, Lo, Hi); | |||
29382 | } | |||
29383 | ||||
29384 | if (VT == MVT::v8i16) { | |||
29385 | // If we have a constant shift amount, the non-SSE41 path is best as | |||
29386 | // avoiding bitcasts make it easier to constant fold and reduce to PBLENDW. | |||
29387 | bool UseSSE41 = Subtarget.hasSSE41() && | |||
29388 | !ISD::isBuildVectorOfConstantSDNodes(Amt.getNode()); | |||
29389 | ||||
29390 | auto SignBitSelect = [&](SDValue Sel, SDValue V0, SDValue V1) { | |||
29391 | // On SSE41 targets we can use PBLENDVB which selects bytes based just on | |||
29392 | // the sign bit. | |||
29393 | if (UseSSE41) { | |||
29394 | MVT ExtVT = MVT::getVectorVT(MVT::i8, VT.getVectorNumElements() * 2); | |||
29395 | V0 = DAG.getBitcast(ExtVT, V0); | |||
29396 | V1 = DAG.getBitcast(ExtVT, V1); | |||
29397 | Sel = DAG.getBitcast(ExtVT, Sel); | |||
29398 | return DAG.getBitcast( | |||
29399 | VT, DAG.getNode(X86ISD::BLENDV, dl, ExtVT, Sel, V0, V1)); | |||
29400 | } | |||
29401 | // On pre-SSE41 targets we splat the sign bit - a negative value will | |||
29402 | // set all bits of the lanes to true and VSELECT uses that in | |||
29403 | // its OR(AND(V0,C),AND(V1,~C)) lowering. | |||
29404 | SDValue C = | |||
29405 | getTargetVShiftByConstNode(X86ISD::VSRAI, dl, VT, Sel, 15, DAG); | |||
29406 | return DAG.getSelect(dl, VT, C, V0, V1); | |||
29407 | }; | |||
29408 | ||||
29409 | // Turn 'a' into a mask suitable for VSELECT: a = a << 12; | |||
29410 | if (UseSSE41) { | |||
29411 | // On SSE41 targets we need to replicate the shift mask in both | |||
29412 | // bytes for PBLENDVB. | |||
29413 | Amt = DAG.getNode( | |||
29414 | ISD::OR, dl, VT, | |||
29415 | getTargetVShiftByConstNode(X86ISD::VSHLI, dl, VT, Amt, 4, DAG), | |||
29416 | getTargetVShiftByConstNode(X86ISD::VSHLI, dl, VT, Amt, 12, DAG)); | |||
29417 | } else { | |||
29418 | Amt = getTargetVShiftByConstNode(X86ISD::VSHLI, dl, VT, Amt, 12, DAG); | |||
29419 | } | |||
29420 | ||||
29421 | // r = VSELECT(r, shift(r, 8), a); | |||
29422 | SDValue M = getTargetVShiftByConstNode(X86OpcI, dl, VT, R, 8, DAG); | |||
29423 | R = SignBitSelect(Amt, M, R); | |||
29424 | ||||
29425 | // a += a | |||
29426 | Amt = DAG.getNode(ISD::ADD, dl, VT, Amt, Amt); | |||
29427 | ||||
29428 | // r = VSELECT(r, shift(r, 4), a); | |||
29429 | M = getTargetVShiftByConstNode(X86OpcI, dl, VT, R, 4, DAG); | |||
29430 | R = SignBitSelect(Amt, M, R); | |||
29431 | ||||
29432 | // a += a | |||
29433 | Amt = DAG.getNode(ISD::ADD, dl, VT, Amt, Amt); | |||
29434 | ||||
29435 | // r = VSELECT(r, shift(r, 2), a); | |||
29436 | M = getTargetVShiftByConstNode(X86OpcI, dl, VT, R, 2, DAG); | |||
29437 | R = SignBitSelect(Amt, M, R); | |||
29438 | ||||
29439 | // a += a | |||
29440 | Amt = DAG.getNode(ISD::ADD, dl, VT, Amt, Amt); | |||
29441 | ||||
29442 | // return VSELECT(r, shift(r, 1), a); | |||
29443 | M = getTargetVShiftByConstNode(X86OpcI, dl, VT, R, 1, DAG); | |||
29444 | R = SignBitSelect(Amt, M, R); | |||
29445 | return R; | |||
29446 | } | |||
29447 | ||||
29448 | // Decompose 256-bit shifts into 128-bit shifts. | |||
29449 | if (VT.is256BitVector()) | |||
29450 | return splitVectorIntBinary(Op, DAG); | |||
29451 | ||||
29452 | if (VT == MVT::v32i16 || VT == MVT::v64i8) | |||
29453 | return splitVectorIntBinary(Op, DAG); | |||
29454 | ||||
29455 | return SDValue(); | |||
29456 | } | |||
29457 | ||||
29458 | static SDValue LowerRotate(SDValue Op, const X86Subtarget &Subtarget, | |||
29459 | SelectionDAG &DAG) { | |||
29460 | MVT VT = Op.getSimpleValueType(); | |||
29461 | assert(VT.isVector() && "Custom lowering only for vector rotates!")(static_cast <bool> (VT.isVector() && "Custom lowering only for vector rotates!" ) ? void (0) : __assert_fail ("VT.isVector() && \"Custom lowering only for vector rotates!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 29461, __extension__ __PRETTY_FUNCTION__)); | |||
29462 | ||||
29463 | SDLoc DL(Op); | |||
29464 | SDValue R = Op.getOperand(0); | |||
29465 | SDValue Amt = Op.getOperand(1); | |||
29466 | unsigned Opcode = Op.getOpcode(); | |||
29467 | unsigned EltSizeInBits = VT.getScalarSizeInBits(); | |||
29468 | int NumElts = VT.getVectorNumElements(); | |||
29469 | ||||
29470 | // Check for constant splat rotation amount. | |||
29471 | APInt CstSplatValue; | |||
29472 | bool IsCstSplat = X86::isConstantSplat(Amt, CstSplatValue); | |||
29473 | ||||
29474 | // Check for splat rotate by zero. | |||
29475 | if (IsCstSplat && CstSplatValue.urem(EltSizeInBits) == 0) | |||
29476 | return R; | |||
29477 | ||||
29478 | // AVX512 implicitly uses modulo rotation amounts. | |||
29479 | if (Subtarget.hasAVX512() && 32 <= EltSizeInBits) { | |||
29480 | // Attempt to rotate by immediate. | |||
29481 | if (IsCstSplat) { | |||
29482 | unsigned RotOpc = (Opcode == ISD::ROTL ? X86ISD::VROTLI : X86ISD::VROTRI); | |||
29483 | uint64_t RotAmt = CstSplatValue.urem(EltSizeInBits); | |||
29484 | return DAG.getNode(RotOpc, DL, VT, R, | |||
29485 | DAG.getTargetConstant(RotAmt, DL, MVT::i8)); | |||
29486 | } | |||
29487 | ||||
29488 | // Else, fall-back on VPROLV/VPRORV. | |||
29489 | return Op; | |||
29490 | } | |||
29491 | ||||
29492 | // AVX512 VBMI2 vXi16 - lower to funnel shifts. | |||
29493 | if (Subtarget.hasVBMI2() && 16 == EltSizeInBits) { | |||
29494 | unsigned FunnelOpc = (Opcode == ISD::ROTL ? ISD::FSHL : ISD::FSHR); | |||
29495 | return DAG.getNode(FunnelOpc, DL, VT, R, R, Amt); | |||
29496 | } | |||
29497 | ||||
29498 | assert((Opcode == ISD::ROTL) && "Only ROTL supported")(static_cast <bool> ((Opcode == ISD::ROTL) && "Only ROTL supported" ) ? void (0) : __assert_fail ("(Opcode == ISD::ROTL) && \"Only ROTL supported\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 29498, __extension__ __PRETTY_FUNCTION__)); | |||
29499 | ||||
29500 | // XOP has 128-bit vector variable + immediate rotates. | |||
29501 | // +ve/-ve Amt = rotate left/right - just need to handle ISD::ROTL. | |||
29502 | // XOP implicitly uses modulo rotation amounts. | |||
29503 | if (Subtarget.hasXOP()) { | |||
29504 | if (VT.is256BitVector()) | |||
29505 | return splitVectorIntBinary(Op, DAG); | |||
29506 | assert(VT.is128BitVector() && "Only rotate 128-bit vectors!")(static_cast <bool> (VT.is128BitVector() && "Only rotate 128-bit vectors!" ) ? void (0) : __assert_fail ("VT.is128BitVector() && \"Only rotate 128-bit vectors!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 29506, __extension__ __PRETTY_FUNCTION__)); | |||
29507 | ||||
29508 | // Attempt to rotate by immediate. | |||
29509 | if (IsCstSplat) { | |||
29510 | uint64_t RotAmt = CstSplatValue.urem(EltSizeInBits); | |||
29511 | return DAG.getNode(X86ISD::VROTLI, DL, VT, R, | |||
29512 | DAG.getTargetConstant(RotAmt, DL, MVT::i8)); | |||
29513 | } | |||
29514 | ||||
29515 | // Use general rotate by variable (per-element). | |||
29516 | return Op; | |||
29517 | } | |||
29518 | ||||
29519 | // Split 256-bit integers on pre-AVX2 targets. | |||
29520 | if (VT.is256BitVector() && !Subtarget.hasAVX2()) | |||
29521 | return splitVectorIntBinary(Op, DAG); | |||
29522 | ||||
29523 | assert((VT == MVT::v4i32 || VT == MVT::v8i16 || VT == MVT::v16i8 ||(static_cast <bool> ((VT == MVT::v4i32 || VT == MVT::v8i16 || VT == MVT::v16i8 || ((VT == MVT::v8i32 || VT == MVT::v16i16 || VT == MVT::v32i8 || VT == MVT::v32i16) && Subtarget .hasAVX2())) && "Only vXi32/vXi16/vXi8 vector rotates supported" ) ? void (0) : __assert_fail ("(VT == MVT::v4i32 || VT == MVT::v8i16 || VT == MVT::v16i8 || ((VT == MVT::v8i32 || VT == MVT::v16i16 || VT == MVT::v32i8 || VT == MVT::v32i16) && Subtarget.hasAVX2())) && \"Only vXi32/vXi16/vXi8 vector rotates supported\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 29527, __extension__ __PRETTY_FUNCTION__)) | |||
29524 | ((VT == MVT::v8i32 || VT == MVT::v16i16 || VT == MVT::v32i8 ||(static_cast <bool> ((VT == MVT::v4i32 || VT == MVT::v8i16 || VT == MVT::v16i8 || ((VT == MVT::v8i32 || VT == MVT::v16i16 || VT == MVT::v32i8 || VT == MVT::v32i16) && Subtarget .hasAVX2())) && "Only vXi32/vXi16/vXi8 vector rotates supported" ) ? void (0) : __assert_fail ("(VT == MVT::v4i32 || VT == MVT::v8i16 || VT == MVT::v16i8 || ((VT == MVT::v8i32 || VT == MVT::v16i16 || VT == MVT::v32i8 || VT == MVT::v32i16) && Subtarget.hasAVX2())) && \"Only vXi32/vXi16/vXi8 vector rotates supported\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 29527, __extension__ __PRETTY_FUNCTION__)) | |||
29525 | VT == MVT::v32i16) &&(static_cast <bool> ((VT == MVT::v4i32 || VT == MVT::v8i16 || VT == MVT::v16i8 || ((VT == MVT::v8i32 || VT == MVT::v16i16 || VT == MVT::v32i8 || VT == MVT::v32i16) && Subtarget .hasAVX2())) && "Only vXi32/vXi16/vXi8 vector rotates supported" ) ? void (0) : __assert_fail ("(VT == MVT::v4i32 || VT == MVT::v8i16 || VT == MVT::v16i8 || ((VT == MVT::v8i32 || VT == MVT::v16i16 || VT == MVT::v32i8 || VT == MVT::v32i16) && Subtarget.hasAVX2())) && \"Only vXi32/vXi16/vXi8 vector rotates supported\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 29527, __extension__ __PRETTY_FUNCTION__)) | |||
29526 | Subtarget.hasAVX2())) &&(static_cast <bool> ((VT == MVT::v4i32 || VT == MVT::v8i16 || VT == MVT::v16i8 || ((VT == MVT::v8i32 || VT == MVT::v16i16 || VT == MVT::v32i8 || VT == MVT::v32i16) && Subtarget .hasAVX2())) && "Only vXi32/vXi16/vXi8 vector rotates supported" ) ? void (0) : __assert_fail ("(VT == MVT::v4i32 || VT == MVT::v8i16 || VT == MVT::v16i8 || ((VT == MVT::v8i32 || VT == MVT::v16i16 || VT == MVT::v32i8 || VT == MVT::v32i16) && Subtarget.hasAVX2())) && \"Only vXi32/vXi16/vXi8 vector rotates supported\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 29527, __extension__ __PRETTY_FUNCTION__)) | |||
29527 | "Only vXi32/vXi16/vXi8 vector rotates supported")(static_cast <bool> ((VT == MVT::v4i32 || VT == MVT::v8i16 || VT == MVT::v16i8 || ((VT == MVT::v8i32 || VT == MVT::v16i16 || VT == MVT::v32i8 || VT == MVT::v32i16) && Subtarget .hasAVX2())) && "Only vXi32/vXi16/vXi8 vector rotates supported" ) ? void (0) : __assert_fail ("(VT == MVT::v4i32 || VT == MVT::v8i16 || VT == MVT::v16i8 || ((VT == MVT::v8i32 || VT == MVT::v16i16 || VT == MVT::v32i8 || VT == MVT::v32i16) && Subtarget.hasAVX2())) && \"Only vXi32/vXi16/vXi8 vector rotates supported\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 29527, __extension__ __PRETTY_FUNCTION__)); | |||
29528 | ||||
29529 | // Rotate by an uniform constant - expand back to shifts. | |||
29530 | if (IsCstSplat) | |||
29531 | return SDValue(); | |||
29532 | ||||
29533 | bool IsSplatAmt = DAG.isSplatValue(Amt); | |||
29534 | ||||
29535 | // v16i8/v32i8: Split rotation into rot4/rot2/rot1 stages and select by | |||
29536 | // the amount bit. | |||
29537 | if (EltSizeInBits == 8 && !IsSplatAmt) { | |||
29538 | if (ISD::isBuildVectorOfConstantSDNodes(Amt.getNode())) | |||
29539 | return SDValue(); | |||
29540 | ||||
29541 | // We don't need ModuloAmt here as we just peek at individual bits. | |||
29542 | MVT ExtVT = MVT::getVectorVT(MVT::i16, NumElts / 2); | |||
29543 | ||||
29544 | auto SignBitSelect = [&](MVT SelVT, SDValue Sel, SDValue V0, SDValue V1) { | |||
29545 | if (Subtarget.hasSSE41()) { | |||
29546 | // On SSE41 targets we can use PBLENDVB which selects bytes based just | |||
29547 | // on the sign bit. | |||
29548 | V0 = DAG.getBitcast(VT, V0); | |||
29549 | V1 = DAG.getBitcast(VT, V1); | |||
29550 | Sel = DAG.getBitcast(VT, Sel); | |||
29551 | return DAG.getBitcast(SelVT, | |||
29552 | DAG.getNode(X86ISD::BLENDV, DL, VT, Sel, V0, V1)); | |||
29553 | } | |||
29554 | // On pre-SSE41 targets we test for the sign bit by comparing to | |||
29555 | // zero - a negative value will set all bits of the lanes to true | |||
29556 | // and VSELECT uses that in its OR(AND(V0,C),AND(V1,~C)) lowering. | |||
29557 | SDValue Z = DAG.getConstant(0, DL, SelVT); | |||
29558 | SDValue C = DAG.getNode(X86ISD::PCMPGT, DL, SelVT, Z, Sel); | |||
29559 | return DAG.getSelect(DL, SelVT, C, V0, V1); | |||
29560 | }; | |||
29561 | ||||
29562 | // Turn 'a' into a mask suitable for VSELECT: a = a << 5; | |||
29563 | // We can safely do this using i16 shifts as we're only interested in | |||
29564 | // the 3 lower bits of each byte. | |||
29565 | Amt = DAG.getBitcast(ExtVT, Amt); | |||
29566 | Amt = DAG.getNode(ISD::SHL, DL, ExtVT, Amt, DAG.getConstant(5, DL, ExtVT)); | |||
29567 | Amt = DAG.getBitcast(VT, Amt); | |||
29568 | ||||
29569 | // r = VSELECT(r, rot(r, 4), a); | |||
29570 | SDValue M; | |||
29571 | M = DAG.getNode( | |||
29572 | ISD::OR, DL, VT, | |||
29573 | DAG.getNode(ISD::SHL, DL, VT, R, DAG.getConstant(4, DL, VT)), | |||
29574 | DAG.getNode(ISD::SRL, DL, VT, R, DAG.getConstant(4, DL, VT))); | |||
29575 | R = SignBitSelect(VT, Amt, M, R); | |||
29576 | ||||
29577 | // a += a | |||
29578 | Amt = DAG.getNode(ISD::ADD, DL, VT, Amt, Amt); | |||
29579 | ||||
29580 | // r = VSELECT(r, rot(r, 2), a); | |||
29581 | M = DAG.getNode( | |||
29582 | ISD::OR, DL, VT, | |||
29583 | DAG.getNode(ISD::SHL, DL, VT, R, DAG.getConstant(2, DL, VT)), | |||
29584 | DAG.getNode(ISD::SRL, DL, VT, R, DAG.getConstant(6, DL, VT))); | |||
29585 | R = SignBitSelect(VT, Amt, M, R); | |||
29586 | ||||
29587 | // a += a | |||
29588 | Amt = DAG.getNode(ISD::ADD, DL, VT, Amt, Amt); | |||
29589 | ||||
29590 | // return VSELECT(r, rot(r, 1), a); | |||
29591 | M = DAG.getNode( | |||
29592 | ISD::OR, DL, VT, | |||
29593 | DAG.getNode(ISD::SHL, DL, VT, R, DAG.getConstant(1, DL, VT)), | |||
29594 | DAG.getNode(ISD::SRL, DL, VT, R, DAG.getConstant(7, DL, VT))); | |||
29595 | return SignBitSelect(VT, Amt, M, R); | |||
29596 | } | |||
29597 | ||||
29598 | // ISD::ROT* uses modulo rotate amounts. | |||
29599 | if (SDValue BaseRotAmt = DAG.getSplatValue(Amt)) { | |||
29600 | // If the amount is a splat, perform the modulo BEFORE the splat, | |||
29601 | // this helps LowerScalarVariableShift to remove the splat later. | |||
29602 | Amt = DAG.getNode(ISD::SCALAR_TO_VECTOR, DL, VT, BaseRotAmt); | |||
29603 | Amt = DAG.getNode(ISD::AND, DL, VT, Amt, | |||
29604 | DAG.getConstant(EltSizeInBits - 1, DL, VT)); | |||
29605 | Amt = DAG.getVectorShuffle(VT, DL, Amt, DAG.getUNDEF(VT), | |||
29606 | SmallVector<int>(NumElts, 0)); | |||
29607 | } else { | |||
29608 | Amt = DAG.getNode(ISD::AND, DL, VT, Amt, | |||
29609 | DAG.getConstant(EltSizeInBits - 1, DL, VT)); | |||
29610 | } | |||
29611 | ||||
29612 | bool ConstantAmt = ISD::isBuildVectorOfConstantSDNodes(Amt.getNode()); | |||
29613 | bool LegalVarShifts = SupportedVectorVarShift(VT, Subtarget, ISD::SHL) && | |||
29614 | SupportedVectorVarShift(VT, Subtarget, ISD::SRL); | |||
29615 | ||||
29616 | // Fallback for splats + all supported variable shifts. | |||
29617 | // Fallback for non-constants AVX2 vXi16 as well. | |||
29618 | if (IsSplatAmt || LegalVarShifts || (Subtarget.hasAVX2() && !ConstantAmt)) { | |||
29619 | SDValue AmtR = DAG.getConstant(EltSizeInBits, DL, VT); | |||
29620 | AmtR = DAG.getNode(ISD::SUB, DL, VT, AmtR, Amt); | |||
29621 | SDValue SHL = DAG.getNode(ISD::SHL, DL, VT, R, Amt); | |||
29622 | SDValue SRL = DAG.getNode(ISD::SRL, DL, VT, R, AmtR); | |||
29623 | return DAG.getNode(ISD::OR, DL, VT, SHL, SRL); | |||
29624 | } | |||
29625 | ||||
29626 | // As with shifts, convert the rotation amount to a multiplication factor. | |||
29627 | SDValue Scale = convertShiftLeftToScale(Amt, DL, Subtarget, DAG); | |||
29628 | assert(Scale && "Failed to convert ROTL amount to scale")(static_cast <bool> (Scale && "Failed to convert ROTL amount to scale" ) ? void (0) : __assert_fail ("Scale && \"Failed to convert ROTL amount to scale\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 29628, __extension__ __PRETTY_FUNCTION__)); | |||
29629 | ||||
29630 | // v8i16/v16i16: perform unsigned multiply hi/lo and OR the results. | |||
29631 | if (EltSizeInBits == 16) { | |||
29632 | SDValue Lo = DAG.getNode(ISD::MUL, DL, VT, R, Scale); | |||
29633 | SDValue Hi = DAG.getNode(ISD::MULHU, DL, VT, R, Scale); | |||
29634 | return DAG.getNode(ISD::OR, DL, VT, Lo, Hi); | |||
29635 | } | |||
29636 | ||||
29637 | // v4i32: make use of the PMULUDQ instruction to multiply 2 lanes of v4i32 | |||
29638 | // to v2i64 results at a time. The upper 32-bits contain the wrapped bits | |||
29639 | // that can then be OR'd with the lower 32-bits. | |||
29640 | assert(VT == MVT::v4i32 && "Only v4i32 vector rotate expected")(static_cast <bool> (VT == MVT::v4i32 && "Only v4i32 vector rotate expected" ) ? void (0) : __assert_fail ("VT == MVT::v4i32 && \"Only v4i32 vector rotate expected\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 29640, __extension__ __PRETTY_FUNCTION__)); | |||
29641 | static const int OddMask[] = {1, -1, 3, -1}; | |||
29642 | SDValue R13 = DAG.getVectorShuffle(VT, DL, R, R, OddMask); | |||
29643 | SDValue Scale13 = DAG.getVectorShuffle(VT, DL, Scale, Scale, OddMask); | |||
29644 | ||||
29645 | SDValue Res02 = DAG.getNode(X86ISD::PMULUDQ, DL, MVT::v2i64, | |||
29646 | DAG.getBitcast(MVT::v2i64, R), | |||
29647 | DAG.getBitcast(MVT::v2i64, Scale)); | |||
29648 | SDValue Res13 = DAG.getNode(X86ISD::PMULUDQ, DL, MVT::v2i64, | |||
29649 | DAG.getBitcast(MVT::v2i64, R13), | |||
29650 | DAG.getBitcast(MVT::v2i64, Scale13)); | |||
29651 | Res02 = DAG.getBitcast(VT, Res02); | |||
29652 | Res13 = DAG.getBitcast(VT, Res13); | |||
29653 | ||||
29654 | return DAG.getNode(ISD::OR, DL, VT, | |||
29655 | DAG.getVectorShuffle(VT, DL, Res02, Res13, {0, 4, 2, 6}), | |||
29656 | DAG.getVectorShuffle(VT, DL, Res02, Res13, {1, 5, 3, 7})); | |||
29657 | } | |||
29658 | ||||
29659 | /// Returns true if the operand type is exactly twice the native width, and | |||
29660 | /// the corresponding cmpxchg8b or cmpxchg16b instruction is available. | |||
29661 | /// Used to know whether to use cmpxchg8/16b when expanding atomic operations | |||
29662 | /// (otherwise we leave them alone to become __sync_fetch_and_... calls). | |||
29663 | bool X86TargetLowering::needsCmpXchgNb(Type *MemType) const { | |||
29664 | unsigned OpWidth = MemType->getPrimitiveSizeInBits(); | |||
29665 | ||||
29666 | if (OpWidth == 64) | |||
29667 | return Subtarget.hasCmpxchg8b() && !Subtarget.is64Bit(); | |||
29668 | if (OpWidth == 128) | |||
29669 | return Subtarget.hasCmpxchg16b(); | |||
29670 | ||||
29671 | return false; | |||
29672 | } | |||
29673 | ||||
29674 | bool X86TargetLowering::shouldExpandAtomicStoreInIR(StoreInst *SI) const { | |||
29675 | Type *MemType = SI->getValueOperand()->getType(); | |||
29676 | ||||
29677 | bool NoImplicitFloatOps = | |||
29678 | SI->getFunction()->hasFnAttribute(Attribute::NoImplicitFloat); | |||
29679 | if (MemType->getPrimitiveSizeInBits() == 64 && !Subtarget.is64Bit() && | |||
29680 | !Subtarget.useSoftFloat() && !NoImplicitFloatOps && | |||
29681 | (Subtarget.hasSSE1() || Subtarget.hasX87())) | |||
29682 | return false; | |||
29683 | ||||
29684 | return needsCmpXchgNb(MemType); | |||
29685 | } | |||
29686 | ||||
29687 | // Note: this turns large loads into lock cmpxchg8b/16b. | |||
29688 | // TODO: In 32-bit mode, use MOVLPS when SSE1 is available? | |||
29689 | TargetLowering::AtomicExpansionKind | |||
29690 | X86TargetLowering::shouldExpandAtomicLoadInIR(LoadInst *LI) const { | |||
29691 | Type *MemType = LI->getType(); | |||
29692 | ||||
29693 | // If this a 64 bit atomic load on a 32-bit target and SSE2 is enabled, we | |||
29694 | // can use movq to do the load. If we have X87 we can load into an 80-bit | |||
29695 | // X87 register and store it to a stack temporary. | |||
29696 | bool NoImplicitFloatOps = | |||
29697 | LI->getFunction()->hasFnAttribute(Attribute::NoImplicitFloat); | |||
29698 | if (MemType->getPrimitiveSizeInBits() == 64 && !Subtarget.is64Bit() && | |||
29699 | !Subtarget.useSoftFloat() && !NoImplicitFloatOps && | |||
29700 | (Subtarget.hasSSE1() || Subtarget.hasX87())) | |||
29701 | return AtomicExpansionKind::None; | |||
29702 | ||||
29703 | return needsCmpXchgNb(MemType) ? AtomicExpansionKind::CmpXChg | |||
29704 | : AtomicExpansionKind::None; | |||
29705 | } | |||
29706 | ||||
29707 | TargetLowering::AtomicExpansionKind | |||
29708 | X86TargetLowering::shouldExpandAtomicRMWInIR(AtomicRMWInst *AI) const { | |||
29709 | unsigned NativeWidth = Subtarget.is64Bit() ? 64 : 32; | |||
29710 | Type *MemType = AI->getType(); | |||
29711 | ||||
29712 | // If the operand is too big, we must see if cmpxchg8/16b is available | |||
29713 | // and default to library calls otherwise. | |||
29714 | if (MemType->getPrimitiveSizeInBits() > NativeWidth) { | |||
29715 | return needsCmpXchgNb(MemType) ? AtomicExpansionKind::CmpXChg | |||
29716 | : AtomicExpansionKind::None; | |||
29717 | } | |||
29718 | ||||
29719 | AtomicRMWInst::BinOp Op = AI->getOperation(); | |||
29720 | switch (Op) { | |||
29721 | default: | |||
29722 | llvm_unreachable("Unknown atomic operation")::llvm::llvm_unreachable_internal("Unknown atomic operation", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 29722); | |||
29723 | case AtomicRMWInst::Xchg: | |||
29724 | case AtomicRMWInst::Add: | |||
29725 | case AtomicRMWInst::Sub: | |||
29726 | // It's better to use xadd, xsub or xchg for these in all cases. | |||
29727 | return AtomicExpansionKind::None; | |||
29728 | case AtomicRMWInst::Or: | |||
29729 | case AtomicRMWInst::And: | |||
29730 | case AtomicRMWInst::Xor: | |||
29731 | // If the atomicrmw's result isn't actually used, we can just add a "lock" | |||
29732 | // prefix to a normal instruction for these operations. | |||
29733 | return !AI->use_empty() ? AtomicExpansionKind::CmpXChg | |||
29734 | : AtomicExpansionKind::None; | |||
29735 | case AtomicRMWInst::Nand: | |||
29736 | case AtomicRMWInst::Max: | |||
29737 | case AtomicRMWInst::Min: | |||
29738 | case AtomicRMWInst::UMax: | |||
29739 | case AtomicRMWInst::UMin: | |||
29740 | case AtomicRMWInst::FAdd: | |||
29741 | case AtomicRMWInst::FSub: | |||
29742 | // These always require a non-trivial set of data operations on x86. We must | |||
29743 | // use a cmpxchg loop. | |||
29744 | return AtomicExpansionKind::CmpXChg; | |||
29745 | } | |||
29746 | } | |||
29747 | ||||
29748 | LoadInst * | |||
29749 | X86TargetLowering::lowerIdempotentRMWIntoFencedLoad(AtomicRMWInst *AI) const { | |||
29750 | unsigned NativeWidth = Subtarget.is64Bit() ? 64 : 32; | |||
29751 | Type *MemType = AI->getType(); | |||
29752 | // Accesses larger than the native width are turned into cmpxchg/libcalls, so | |||
29753 | // there is no benefit in turning such RMWs into loads, and it is actually | |||
29754 | // harmful as it introduces a mfence. | |||
29755 | if (MemType->getPrimitiveSizeInBits() > NativeWidth) | |||
29756 | return nullptr; | |||
29757 | ||||
29758 | // If this is a canonical idempotent atomicrmw w/no uses, we have a better | |||
29759 | // lowering available in lowerAtomicArith. | |||
29760 | // TODO: push more cases through this path. | |||
29761 | if (auto *C = dyn_cast<ConstantInt>(AI->getValOperand())) | |||
29762 | if (AI->getOperation() == AtomicRMWInst::Or && C->isZero() && | |||
29763 | AI->use_empty()) | |||
29764 | return nullptr; | |||
29765 | ||||
29766 | IRBuilder<> Builder(AI); | |||
29767 | Module *M = Builder.GetInsertBlock()->getParent()->getParent(); | |||
29768 | auto SSID = AI->getSyncScopeID(); | |||
29769 | // We must restrict the ordering to avoid generating loads with Release or | |||
29770 | // ReleaseAcquire orderings. | |||
29771 | auto Order = AtomicCmpXchgInst::getStrongestFailureOrdering(AI->getOrdering()); | |||
29772 | ||||
29773 | // Before the load we need a fence. Here is an example lifted from | |||
29774 | // http://www.hpl.hp.com/techreports/2012/HPL-2012-68.pdf showing why a fence | |||
29775 | // is required: | |||
29776 | // Thread 0: | |||
29777 | // x.store(1, relaxed); | |||
29778 | // r1 = y.fetch_add(0, release); | |||
29779 | // Thread 1: | |||
29780 | // y.fetch_add(42, acquire); | |||
29781 | // r2 = x.load(relaxed); | |||
29782 | // r1 = r2 = 0 is impossible, but becomes possible if the idempotent rmw is | |||
29783 | // lowered to just a load without a fence. A mfence flushes the store buffer, | |||
29784 | // making the optimization clearly correct. | |||
29785 | // FIXME: it is required if isReleaseOrStronger(Order) but it is not clear | |||
29786 | // otherwise, we might be able to be more aggressive on relaxed idempotent | |||
29787 | // rmw. In practice, they do not look useful, so we don't try to be | |||
29788 | // especially clever. | |||
29789 | if (SSID == SyncScope::SingleThread) | |||
29790 | // FIXME: we could just insert an X86ISD::MEMBARRIER here, except we are at | |||
29791 | // the IR level, so we must wrap it in an intrinsic. | |||
29792 | return nullptr; | |||
29793 | ||||
29794 | if (!Subtarget.hasMFence()) | |||
29795 | // FIXME: it might make sense to use a locked operation here but on a | |||
29796 | // different cache-line to prevent cache-line bouncing. In practice it | |||
29797 | // is probably a small win, and x86 processors without mfence are rare | |||
29798 | // enough that we do not bother. | |||
29799 | return nullptr; | |||
29800 | ||||
29801 | Function *MFence = | |||
29802 | llvm::Intrinsic::getDeclaration(M, Intrinsic::x86_sse2_mfence); | |||
29803 | Builder.CreateCall(MFence, {}); | |||
29804 | ||||
29805 | // Finally we can emit the atomic load. | |||
29806 | LoadInst *Loaded = Builder.CreateAlignedLoad( | |||
29807 | AI->getType(), AI->getPointerOperand(), AI->getAlign()); | |||
29808 | Loaded->setAtomic(Order, SSID); | |||
29809 | AI->replaceAllUsesWith(Loaded); | |||
29810 | AI->eraseFromParent(); | |||
29811 | return Loaded; | |||
29812 | } | |||
29813 | ||||
29814 | bool X86TargetLowering::lowerAtomicStoreAsStoreSDNode(const StoreInst &SI) const { | |||
29815 | if (!SI.isUnordered()) | |||
29816 | return false; | |||
29817 | return ExperimentalUnorderedISEL; | |||
29818 | } | |||
29819 | bool X86TargetLowering::lowerAtomicLoadAsLoadSDNode(const LoadInst &LI) const { | |||
29820 | if (!LI.isUnordered()) | |||
29821 | return false; | |||
29822 | return ExperimentalUnorderedISEL; | |||
29823 | } | |||
29824 | ||||
29825 | ||||
29826 | /// Emit a locked operation on a stack location which does not change any | |||
29827 | /// memory location, but does involve a lock prefix. Location is chosen to be | |||
29828 | /// a) very likely accessed only by a single thread to minimize cache traffic, | |||
29829 | /// and b) definitely dereferenceable. Returns the new Chain result. | |||
29830 | static SDValue emitLockedStackOp(SelectionDAG &DAG, | |||
29831 | const X86Subtarget &Subtarget, SDValue Chain, | |||
29832 | const SDLoc &DL) { | |||
29833 | // Implementation notes: | |||
29834 | // 1) LOCK prefix creates a full read/write reordering barrier for memory | |||
29835 | // operations issued by the current processor. As such, the location | |||
29836 | // referenced is not relevant for the ordering properties of the instruction. | |||
29837 | // See: Intel® 64 and IA-32 ArchitecturesSoftware Developer’s Manual, | |||
29838 | // 8.2.3.9 Loads and Stores Are Not Reordered with Locked Instructions | |||
29839 | // 2) Using an immediate operand appears to be the best encoding choice | |||
29840 | // here since it doesn't require an extra register. | |||
29841 | // 3) OR appears to be very slightly faster than ADD. (Though, the difference | |||
29842 | // is small enough it might just be measurement noise.) | |||
29843 | // 4) When choosing offsets, there are several contributing factors: | |||
29844 | // a) If there's no redzone, we default to TOS. (We could allocate a cache | |||
29845 | // line aligned stack object to improve this case.) | |||
29846 | // b) To minimize our chances of introducing a false dependence, we prefer | |||
29847 | // to offset the stack usage from TOS slightly. | |||
29848 | // c) To minimize concerns about cross thread stack usage - in particular, | |||
29849 | // the idiomatic MyThreadPool.run([&StackVars]() {...}) pattern which | |||
29850 | // captures state in the TOS frame and accesses it from many threads - | |||
29851 | // we want to use an offset such that the offset is in a distinct cache | |||
29852 | // line from the TOS frame. | |||
29853 | // | |||
29854 | // For a general discussion of the tradeoffs and benchmark results, see: | |||
29855 | // https://shipilev.net/blog/2014/on-the-fence-with-dependencies/ | |||
29856 | ||||
29857 | auto &MF = DAG.getMachineFunction(); | |||
29858 | auto &TFL = *Subtarget.getFrameLowering(); | |||
29859 | const unsigned SPOffset = TFL.has128ByteRedZone(MF) ? -64 : 0; | |||
29860 | ||||
29861 | if (Subtarget.is64Bit()) { | |||
29862 | SDValue Zero = DAG.getTargetConstant(0, DL, MVT::i32); | |||
29863 | SDValue Ops[] = { | |||
29864 | DAG.getRegister(X86::RSP, MVT::i64), // Base | |||
29865 | DAG.getTargetConstant(1, DL, MVT::i8), // Scale | |||
29866 | DAG.getRegister(0, MVT::i64), // Index | |||
29867 | DAG.getTargetConstant(SPOffset, DL, MVT::i32), // Disp | |||
29868 | DAG.getRegister(0, MVT::i16), // Segment. | |||
29869 | Zero, | |||
29870 | Chain}; | |||
29871 | SDNode *Res = DAG.getMachineNode(X86::OR32mi8Locked, DL, MVT::i32, | |||
29872 | MVT::Other, Ops); | |||
29873 | return SDValue(Res, 1); | |||
29874 | } | |||
29875 | ||||
29876 | SDValue Zero = DAG.getTargetConstant(0, DL, MVT::i32); | |||
29877 | SDValue Ops[] = { | |||
29878 | DAG.getRegister(X86::ESP, MVT::i32), // Base | |||
29879 | DAG.getTargetConstant(1, DL, MVT::i8), // Scale | |||
29880 | DAG.getRegister(0, MVT::i32), // Index | |||
29881 | DAG.getTargetConstant(SPOffset, DL, MVT::i32), // Disp | |||
29882 | DAG.getRegister(0, MVT::i16), // Segment. | |||
29883 | Zero, | |||
29884 | Chain | |||
29885 | }; | |||
29886 | SDNode *Res = DAG.getMachineNode(X86::OR32mi8Locked, DL, MVT::i32, | |||
29887 | MVT::Other, Ops); | |||
29888 | return SDValue(Res, 1); | |||
29889 | } | |||
29890 | ||||
29891 | static SDValue LowerATOMIC_FENCE(SDValue Op, const X86Subtarget &Subtarget, | |||
29892 | SelectionDAG &DAG) { | |||
29893 | SDLoc dl(Op); | |||
29894 | AtomicOrdering FenceOrdering = | |||
29895 | static_cast<AtomicOrdering>(Op.getConstantOperandVal(1)); | |||
29896 | SyncScope::ID FenceSSID = | |||
29897 | static_cast<SyncScope::ID>(Op.getConstantOperandVal(2)); | |||
29898 | ||||
29899 | // The only fence that needs an instruction is a sequentially-consistent | |||
29900 | // cross-thread fence. | |||
29901 | if (FenceOrdering == AtomicOrdering::SequentiallyConsistent && | |||
29902 | FenceSSID == SyncScope::System) { | |||
29903 | if (Subtarget.hasMFence()) | |||
29904 | return DAG.getNode(X86ISD::MFENCE, dl, MVT::Other, Op.getOperand(0)); | |||
29905 | ||||
29906 | SDValue Chain = Op.getOperand(0); | |||
29907 | return emitLockedStackOp(DAG, Subtarget, Chain, dl); | |||
29908 | } | |||
29909 | ||||
29910 | // MEMBARRIER is a compiler barrier; it codegens to a no-op. | |||
29911 | return DAG.getNode(X86ISD::MEMBARRIER, dl, MVT::Other, Op.getOperand(0)); | |||
29912 | } | |||
29913 | ||||
29914 | static SDValue LowerCMP_SWAP(SDValue Op, const X86Subtarget &Subtarget, | |||
29915 | SelectionDAG &DAG) { | |||
29916 | MVT T = Op.getSimpleValueType(); | |||
29917 | SDLoc DL(Op); | |||
29918 | unsigned Reg = 0; | |||
29919 | unsigned size = 0; | |||
29920 | switch(T.SimpleTy) { | |||
29921 | default: llvm_unreachable("Invalid value type!")::llvm::llvm_unreachable_internal("Invalid value type!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 29921); | |||
29922 | case MVT::i8: Reg = X86::AL; size = 1; break; | |||
29923 | case MVT::i16: Reg = X86::AX; size = 2; break; | |||
29924 | case MVT::i32: Reg = X86::EAX; size = 4; break; | |||
29925 | case MVT::i64: | |||
29926 | assert(Subtarget.is64Bit() && "Node not type legal!")(static_cast <bool> (Subtarget.is64Bit() && "Node not type legal!" ) ? void (0) : __assert_fail ("Subtarget.is64Bit() && \"Node not type legal!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 29926, __extension__ __PRETTY_FUNCTION__)); | |||
29927 | Reg = X86::RAX; size = 8; | |||
29928 | break; | |||
29929 | } | |||
29930 | SDValue cpIn = DAG.getCopyToReg(Op.getOperand(0), DL, Reg, | |||
29931 | Op.getOperand(2), SDValue()); | |||
29932 | SDValue Ops[] = { cpIn.getValue(0), | |||
29933 | Op.getOperand(1), | |||
29934 | Op.getOperand(3), | |||
29935 | DAG.getTargetConstant(size, DL, MVT::i8), | |||
29936 | cpIn.getValue(1) }; | |||
29937 | SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Glue); | |||
29938 | MachineMemOperand *MMO = cast<AtomicSDNode>(Op)->getMemOperand(); | |||
29939 | SDValue Result = DAG.getMemIntrinsicNode(X86ISD::LCMPXCHG_DAG, DL, Tys, | |||
29940 | Ops, T, MMO); | |||
29941 | ||||
29942 | SDValue cpOut = | |||
29943 | DAG.getCopyFromReg(Result.getValue(0), DL, Reg, T, Result.getValue(1)); | |||
29944 | SDValue EFLAGS = DAG.getCopyFromReg(cpOut.getValue(1), DL, X86::EFLAGS, | |||
29945 | MVT::i32, cpOut.getValue(2)); | |||
29946 | SDValue Success = getSETCC(X86::COND_E, EFLAGS, DL, DAG); | |||
29947 | ||||
29948 | return DAG.getNode(ISD::MERGE_VALUES, DL, Op->getVTList(), | |||
29949 | cpOut, Success, EFLAGS.getValue(1)); | |||
29950 | } | |||
29951 | ||||
29952 | // Create MOVMSKB, taking into account whether we need to split for AVX1. | |||
29953 | static SDValue getPMOVMSKB(const SDLoc &DL, SDValue V, SelectionDAG &DAG, | |||
29954 | const X86Subtarget &Subtarget) { | |||
29955 | MVT InVT = V.getSimpleValueType(); | |||
29956 | ||||
29957 | if (InVT == MVT::v64i8) { | |||
29958 | SDValue Lo, Hi; | |||
29959 | std::tie(Lo, Hi) = DAG.SplitVector(V, DL); | |||
29960 | Lo = getPMOVMSKB(DL, Lo, DAG, Subtarget); | |||
29961 | Hi = getPMOVMSKB(DL, Hi, DAG, Subtarget); | |||
29962 | Lo = DAG.getNode(ISD::ZERO_EXTEND, DL, MVT::i64, Lo); | |||
29963 | Hi = DAG.getNode(ISD::ANY_EXTEND, DL, MVT::i64, Hi); | |||
29964 | Hi = DAG.getNode(ISD::SHL, DL, MVT::i64, Hi, | |||
29965 | DAG.getConstant(32, DL, MVT::i8)); | |||
29966 | return DAG.getNode(ISD::OR, DL, MVT::i64, Lo, Hi); | |||
29967 | } | |||
29968 | if (InVT == MVT::v32i8 && !Subtarget.hasInt256()) { | |||
29969 | SDValue Lo, Hi; | |||
29970 | std::tie(Lo, Hi) = DAG.SplitVector(V, DL); | |||
29971 | Lo = DAG.getNode(X86ISD::MOVMSK, DL, MVT::i32, Lo); | |||
29972 | Hi = DAG.getNode(X86ISD::MOVMSK, DL, MVT::i32, Hi); | |||
29973 | Hi = DAG.getNode(ISD::SHL, DL, MVT::i32, Hi, | |||
29974 | DAG.getConstant(16, DL, MVT::i8)); | |||
29975 | return DAG.getNode(ISD::OR, DL, MVT::i32, Lo, Hi); | |||
29976 | } | |||
29977 | ||||
29978 | return DAG.getNode(X86ISD::MOVMSK, DL, MVT::i32, V); | |||
29979 | } | |||
29980 | ||||
29981 | static SDValue LowerBITCAST(SDValue Op, const X86Subtarget &Subtarget, | |||
29982 | SelectionDAG &DAG) { | |||
29983 | SDValue Src = Op.getOperand(0); | |||
29984 | MVT SrcVT = Src.getSimpleValueType(); | |||
29985 | MVT DstVT = Op.getSimpleValueType(); | |||
29986 | ||||
29987 | // Legalize (v64i1 (bitcast i64 (X))) by splitting the i64, bitcasting each | |||
29988 | // half to v32i1 and concatenating the result. | |||
29989 | if (SrcVT == MVT::i64 && DstVT == MVT::v64i1) { | |||
29990 | assert(!Subtarget.is64Bit() && "Expected 32-bit mode")(static_cast <bool> (!Subtarget.is64Bit() && "Expected 32-bit mode" ) ? void (0) : __assert_fail ("!Subtarget.is64Bit() && \"Expected 32-bit mode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 29990, __extension__ __PRETTY_FUNCTION__)); | |||
29991 | assert(Subtarget.hasBWI() && "Expected BWI target")(static_cast <bool> (Subtarget.hasBWI() && "Expected BWI target" ) ? void (0) : __assert_fail ("Subtarget.hasBWI() && \"Expected BWI target\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 29991, __extension__ __PRETTY_FUNCTION__)); | |||
29992 | SDLoc dl(Op); | |||
29993 | SDValue Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, Src, | |||
29994 | DAG.getIntPtrConstant(0, dl)); | |||
29995 | Lo = DAG.getBitcast(MVT::v32i1, Lo); | |||
29996 | SDValue Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, Src, | |||
29997 | DAG.getIntPtrConstant(1, dl)); | |||
29998 | Hi = DAG.getBitcast(MVT::v32i1, Hi); | |||
29999 | return DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v64i1, Lo, Hi); | |||
30000 | } | |||
30001 | ||||
30002 | // Use MOVMSK for vector to scalar conversion to prevent scalarization. | |||
30003 | if ((SrcVT == MVT::v16i1 || SrcVT == MVT::v32i1) && DstVT.isScalarInteger()) { | |||
30004 | assert(!Subtarget.hasAVX512() && "Should use K-registers with AVX512")(static_cast <bool> (!Subtarget.hasAVX512() && "Should use K-registers with AVX512" ) ? void (0) : __assert_fail ("!Subtarget.hasAVX512() && \"Should use K-registers with AVX512\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30004, __extension__ __PRETTY_FUNCTION__)); | |||
30005 | MVT SExtVT = SrcVT == MVT::v16i1 ? MVT::v16i8 : MVT::v32i8; | |||
30006 | SDLoc DL(Op); | |||
30007 | SDValue V = DAG.getSExtOrTrunc(Src, DL, SExtVT); | |||
30008 | V = getPMOVMSKB(DL, V, DAG, Subtarget); | |||
30009 | return DAG.getZExtOrTrunc(V, DL, DstVT); | |||
30010 | } | |||
30011 | ||||
30012 | assert((SrcVT == MVT::v2i32 || SrcVT == MVT::v4i16 || SrcVT == MVT::v8i8 ||(static_cast <bool> ((SrcVT == MVT::v2i32 || SrcVT == MVT ::v4i16 || SrcVT == MVT::v8i8 || SrcVT == MVT::i64) && "Unexpected VT!") ? void (0) : __assert_fail ("(SrcVT == MVT::v2i32 || SrcVT == MVT::v4i16 || SrcVT == MVT::v8i8 || SrcVT == MVT::i64) && \"Unexpected VT!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30013, __extension__ __PRETTY_FUNCTION__)) | |||
30013 | SrcVT == MVT::i64) && "Unexpected VT!")(static_cast <bool> ((SrcVT == MVT::v2i32 || SrcVT == MVT ::v4i16 || SrcVT == MVT::v8i8 || SrcVT == MVT::i64) && "Unexpected VT!") ? void (0) : __assert_fail ("(SrcVT == MVT::v2i32 || SrcVT == MVT::v4i16 || SrcVT == MVT::v8i8 || SrcVT == MVT::i64) && \"Unexpected VT!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30013, __extension__ __PRETTY_FUNCTION__)); | |||
30014 | ||||
30015 | assert(Subtarget.hasSSE2() && "Requires at least SSE2!")(static_cast <bool> (Subtarget.hasSSE2() && "Requires at least SSE2!" ) ? void (0) : __assert_fail ("Subtarget.hasSSE2() && \"Requires at least SSE2!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30015, __extension__ __PRETTY_FUNCTION__)); | |||
30016 | if (!(DstVT == MVT::f64 && SrcVT == MVT::i64) && | |||
30017 | !(DstVT == MVT::x86mmx && SrcVT.isVector())) | |||
30018 | // This conversion needs to be expanded. | |||
30019 | return SDValue(); | |||
30020 | ||||
30021 | SDLoc dl(Op); | |||
30022 | if (SrcVT.isVector()) { | |||
30023 | // Widen the vector in input in the case of MVT::v2i32. | |||
30024 | // Example: from MVT::v2i32 to MVT::v4i32. | |||
30025 | MVT NewVT = MVT::getVectorVT(SrcVT.getVectorElementType(), | |||
30026 | SrcVT.getVectorNumElements() * 2); | |||
30027 | Src = DAG.getNode(ISD::CONCAT_VECTORS, dl, NewVT, Src, | |||
30028 | DAG.getUNDEF(SrcVT)); | |||
30029 | } else { | |||
30030 | assert(SrcVT == MVT::i64 && !Subtarget.is64Bit() &&(static_cast <bool> (SrcVT == MVT::i64 && !Subtarget .is64Bit() && "Unexpected source type in LowerBITCAST" ) ? void (0) : __assert_fail ("SrcVT == MVT::i64 && !Subtarget.is64Bit() && \"Unexpected source type in LowerBITCAST\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30031, __extension__ __PRETTY_FUNCTION__)) | |||
30031 | "Unexpected source type in LowerBITCAST")(static_cast <bool> (SrcVT == MVT::i64 && !Subtarget .is64Bit() && "Unexpected source type in LowerBITCAST" ) ? void (0) : __assert_fail ("SrcVT == MVT::i64 && !Subtarget.is64Bit() && \"Unexpected source type in LowerBITCAST\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30031, __extension__ __PRETTY_FUNCTION__)); | |||
30032 | Src = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2i64, Src); | |||
30033 | } | |||
30034 | ||||
30035 | MVT V2X64VT = DstVT == MVT::f64 ? MVT::v2f64 : MVT::v2i64; | |||
30036 | Src = DAG.getNode(ISD::BITCAST, dl, V2X64VT, Src); | |||
30037 | ||||
30038 | if (DstVT == MVT::x86mmx) | |||
30039 | return DAG.getNode(X86ISD::MOVDQ2Q, dl, DstVT, Src); | |||
30040 | ||||
30041 | return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, DstVT, Src, | |||
30042 | DAG.getIntPtrConstant(0, dl)); | |||
30043 | } | |||
30044 | ||||
30045 | /// Compute the horizontal sum of bytes in V for the elements of VT. | |||
30046 | /// | |||
30047 | /// Requires V to be a byte vector and VT to be an integer vector type with | |||
30048 | /// wider elements than V's type. The width of the elements of VT determines | |||
30049 | /// how many bytes of V are summed horizontally to produce each element of the | |||
30050 | /// result. | |||
30051 | static SDValue LowerHorizontalByteSum(SDValue V, MVT VT, | |||
30052 | const X86Subtarget &Subtarget, | |||
30053 | SelectionDAG &DAG) { | |||
30054 | SDLoc DL(V); | |||
30055 | MVT ByteVecVT = V.getSimpleValueType(); | |||
30056 | MVT EltVT = VT.getVectorElementType(); | |||
30057 | assert(ByteVecVT.getVectorElementType() == MVT::i8 &&(static_cast <bool> (ByteVecVT.getVectorElementType() == MVT::i8 && "Expected value to have byte element type." ) ? void (0) : __assert_fail ("ByteVecVT.getVectorElementType() == MVT::i8 && \"Expected value to have byte element type.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30058, __extension__ __PRETTY_FUNCTION__)) | |||
30058 | "Expected value to have byte element type.")(static_cast <bool> (ByteVecVT.getVectorElementType() == MVT::i8 && "Expected value to have byte element type." ) ? void (0) : __assert_fail ("ByteVecVT.getVectorElementType() == MVT::i8 && \"Expected value to have byte element type.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30058, __extension__ __PRETTY_FUNCTION__)); | |||
30059 | assert(EltVT != MVT::i8 &&(static_cast <bool> (EltVT != MVT::i8 && "Horizontal byte sum only makes sense for wider elements!" ) ? void (0) : __assert_fail ("EltVT != MVT::i8 && \"Horizontal byte sum only makes sense for wider elements!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30060, __extension__ __PRETTY_FUNCTION__)) | |||
30060 | "Horizontal byte sum only makes sense for wider elements!")(static_cast <bool> (EltVT != MVT::i8 && "Horizontal byte sum only makes sense for wider elements!" ) ? void (0) : __assert_fail ("EltVT != MVT::i8 && \"Horizontal byte sum only makes sense for wider elements!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30060, __extension__ __PRETTY_FUNCTION__)); | |||
30061 | unsigned VecSize = VT.getSizeInBits(); | |||
30062 | assert(ByteVecVT.getSizeInBits() == VecSize && "Cannot change vector size!")(static_cast <bool> (ByteVecVT.getSizeInBits() == VecSize && "Cannot change vector size!") ? void (0) : __assert_fail ("ByteVecVT.getSizeInBits() == VecSize && \"Cannot change vector size!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30062, __extension__ __PRETTY_FUNCTION__)); | |||
30063 | ||||
30064 | // PSADBW instruction horizontally add all bytes and leave the result in i64 | |||
30065 | // chunks, thus directly computes the pop count for v2i64 and v4i64. | |||
30066 | if (EltVT == MVT::i64) { | |||
30067 | SDValue Zeros = DAG.getConstant(0, DL, ByteVecVT); | |||
30068 | MVT SadVecVT = MVT::getVectorVT(MVT::i64, VecSize / 64); | |||
30069 | V = DAG.getNode(X86ISD::PSADBW, DL, SadVecVT, V, Zeros); | |||
30070 | return DAG.getBitcast(VT, V); | |||
30071 | } | |||
30072 | ||||
30073 | if (EltVT == MVT::i32) { | |||
30074 | // We unpack the low half and high half into i32s interleaved with zeros so | |||
30075 | // that we can use PSADBW to horizontally sum them. The most useful part of | |||
30076 | // this is that it lines up the results of two PSADBW instructions to be | |||
30077 | // two v2i64 vectors which concatenated are the 4 population counts. We can | |||
30078 | // then use PACKUSWB to shrink and concatenate them into a v4i32 again. | |||
30079 | SDValue Zeros = DAG.getConstant(0, DL, VT); | |||
30080 | SDValue V32 = DAG.getBitcast(VT, V); | |||
30081 | SDValue Low = getUnpackl(DAG, DL, VT, V32, Zeros); | |||
30082 | SDValue High = getUnpackh(DAG, DL, VT, V32, Zeros); | |||
30083 | ||||
30084 | // Do the horizontal sums into two v2i64s. | |||
30085 | Zeros = DAG.getConstant(0, DL, ByteVecVT); | |||
30086 | MVT SadVecVT = MVT::getVectorVT(MVT::i64, VecSize / 64); | |||
30087 | Low = DAG.getNode(X86ISD::PSADBW, DL, SadVecVT, | |||
30088 | DAG.getBitcast(ByteVecVT, Low), Zeros); | |||
30089 | High = DAG.getNode(X86ISD::PSADBW, DL, SadVecVT, | |||
30090 | DAG.getBitcast(ByteVecVT, High), Zeros); | |||
30091 | ||||
30092 | // Merge them together. | |||
30093 | MVT ShortVecVT = MVT::getVectorVT(MVT::i16, VecSize / 16); | |||
30094 | V = DAG.getNode(X86ISD::PACKUS, DL, ByteVecVT, | |||
30095 | DAG.getBitcast(ShortVecVT, Low), | |||
30096 | DAG.getBitcast(ShortVecVT, High)); | |||
30097 | ||||
30098 | return DAG.getBitcast(VT, V); | |||
30099 | } | |||
30100 | ||||
30101 | // The only element type left is i16. | |||
30102 | assert(EltVT == MVT::i16 && "Unknown how to handle type")(static_cast <bool> (EltVT == MVT::i16 && "Unknown how to handle type" ) ? void (0) : __assert_fail ("EltVT == MVT::i16 && \"Unknown how to handle type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30102, __extension__ __PRETTY_FUNCTION__)); | |||
30103 | ||||
30104 | // To obtain pop count for each i16 element starting from the pop count for | |||
30105 | // i8 elements, shift the i16s left by 8, sum as i8s, and then shift as i16s | |||
30106 | // right by 8. It is important to shift as i16s as i8 vector shift isn't | |||
30107 | // directly supported. | |||
30108 | SDValue ShifterV = DAG.getConstant(8, DL, VT); | |||
30109 | SDValue Shl = DAG.getNode(ISD::SHL, DL, VT, DAG.getBitcast(VT, V), ShifterV); | |||
30110 | V = DAG.getNode(ISD::ADD, DL, ByteVecVT, DAG.getBitcast(ByteVecVT, Shl), | |||
30111 | DAG.getBitcast(ByteVecVT, V)); | |||
30112 | return DAG.getNode(ISD::SRL, DL, VT, DAG.getBitcast(VT, V), ShifterV); | |||
30113 | } | |||
30114 | ||||
30115 | static SDValue LowerVectorCTPOPInRegLUT(SDValue Op, const SDLoc &DL, | |||
30116 | const X86Subtarget &Subtarget, | |||
30117 | SelectionDAG &DAG) { | |||
30118 | MVT VT = Op.getSimpleValueType(); | |||
30119 | MVT EltVT = VT.getVectorElementType(); | |||
30120 | int NumElts = VT.getVectorNumElements(); | |||
30121 | (void)EltVT; | |||
30122 | assert(EltVT == MVT::i8 && "Only vXi8 vector CTPOP lowering supported.")(static_cast <bool> (EltVT == MVT::i8 && "Only vXi8 vector CTPOP lowering supported." ) ? void (0) : __assert_fail ("EltVT == MVT::i8 && \"Only vXi8 vector CTPOP lowering supported.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30122, __extension__ __PRETTY_FUNCTION__)); | |||
30123 | ||||
30124 | // Implement a lookup table in register by using an algorithm based on: | |||
30125 | // http://wm.ite.pl/articles/sse-popcount.html | |||
30126 | // | |||
30127 | // The general idea is that every lower byte nibble in the input vector is an | |||
30128 | // index into a in-register pre-computed pop count table. We then split up the | |||
30129 | // input vector in two new ones: (1) a vector with only the shifted-right | |||
30130 | // higher nibbles for each byte and (2) a vector with the lower nibbles (and | |||
30131 | // masked out higher ones) for each byte. PSHUFB is used separately with both | |||
30132 | // to index the in-register table. Next, both are added and the result is a | |||
30133 | // i8 vector where each element contains the pop count for input byte. | |||
30134 | const int LUT[16] = {/* 0 */ 0, /* 1 */ 1, /* 2 */ 1, /* 3 */ 2, | |||
30135 | /* 4 */ 1, /* 5 */ 2, /* 6 */ 2, /* 7 */ 3, | |||
30136 | /* 8 */ 1, /* 9 */ 2, /* a */ 2, /* b */ 3, | |||
30137 | /* c */ 2, /* d */ 3, /* e */ 3, /* f */ 4}; | |||
30138 | ||||
30139 | SmallVector<SDValue, 64> LUTVec; | |||
30140 | for (int i = 0; i < NumElts; ++i) | |||
30141 | LUTVec.push_back(DAG.getConstant(LUT[i % 16], DL, MVT::i8)); | |||
30142 | SDValue InRegLUT = DAG.getBuildVector(VT, DL, LUTVec); | |||
30143 | SDValue M0F = DAG.getConstant(0x0F, DL, VT); | |||
30144 | ||||
30145 | // High nibbles | |||
30146 | SDValue FourV = DAG.getConstant(4, DL, VT); | |||
30147 | SDValue HiNibbles = DAG.getNode(ISD::SRL, DL, VT, Op, FourV); | |||
30148 | ||||
30149 | // Low nibbles | |||
30150 | SDValue LoNibbles = DAG.getNode(ISD::AND, DL, VT, Op, M0F); | |||
30151 | ||||
30152 | // The input vector is used as the shuffle mask that index elements into the | |||
30153 | // LUT. After counting low and high nibbles, add the vector to obtain the | |||
30154 | // final pop count per i8 element. | |||
30155 | SDValue HiPopCnt = DAG.getNode(X86ISD::PSHUFB, DL, VT, InRegLUT, HiNibbles); | |||
30156 | SDValue LoPopCnt = DAG.getNode(X86ISD::PSHUFB, DL, VT, InRegLUT, LoNibbles); | |||
30157 | return DAG.getNode(ISD::ADD, DL, VT, HiPopCnt, LoPopCnt); | |||
30158 | } | |||
30159 | ||||
30160 | // Please ensure that any codegen change from LowerVectorCTPOP is reflected in | |||
30161 | // updated cost models in X86TTIImpl::getIntrinsicInstrCost. | |||
30162 | static SDValue LowerVectorCTPOP(SDValue Op, const X86Subtarget &Subtarget, | |||
30163 | SelectionDAG &DAG) { | |||
30164 | MVT VT = Op.getSimpleValueType(); | |||
30165 | assert((VT.is512BitVector() || VT.is256BitVector() || VT.is128BitVector()) &&(static_cast <bool> ((VT.is512BitVector() || VT.is256BitVector () || VT.is128BitVector()) && "Unknown CTPOP type to handle" ) ? void (0) : __assert_fail ("(VT.is512BitVector() || VT.is256BitVector() || VT.is128BitVector()) && \"Unknown CTPOP type to handle\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30166, __extension__ __PRETTY_FUNCTION__)) | |||
30166 | "Unknown CTPOP type to handle")(static_cast <bool> ((VT.is512BitVector() || VT.is256BitVector () || VT.is128BitVector()) && "Unknown CTPOP type to handle" ) ? void (0) : __assert_fail ("(VT.is512BitVector() || VT.is256BitVector() || VT.is128BitVector()) && \"Unknown CTPOP type to handle\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30166, __extension__ __PRETTY_FUNCTION__)); | |||
30167 | SDLoc DL(Op.getNode()); | |||
30168 | SDValue Op0 = Op.getOperand(0); | |||
30169 | ||||
30170 | // TRUNC(CTPOP(ZEXT(X))) to make use of vXi32/vXi64 VPOPCNT instructions. | |||
30171 | if (Subtarget.hasVPOPCNTDQ()) { | |||
30172 | unsigned NumElems = VT.getVectorNumElements(); | |||
30173 | assert((VT.getVectorElementType() == MVT::i8 ||(static_cast <bool> ((VT.getVectorElementType() == MVT:: i8 || VT.getVectorElementType() == MVT::i16) && "Unexpected type" ) ? void (0) : __assert_fail ("(VT.getVectorElementType() == MVT::i8 || VT.getVectorElementType() == MVT::i16) && \"Unexpected type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30174, __extension__ __PRETTY_FUNCTION__)) | |||
30174 | VT.getVectorElementType() == MVT::i16) && "Unexpected type")(static_cast <bool> ((VT.getVectorElementType() == MVT:: i8 || VT.getVectorElementType() == MVT::i16) && "Unexpected type" ) ? void (0) : __assert_fail ("(VT.getVectorElementType() == MVT::i8 || VT.getVectorElementType() == MVT::i16) && \"Unexpected type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30174, __extension__ __PRETTY_FUNCTION__)); | |||
30175 | if (NumElems < 16 || (NumElems == 16 && Subtarget.canExtendTo512DQ())) { | |||
30176 | MVT NewVT = MVT::getVectorVT(MVT::i32, NumElems); | |||
30177 | Op = DAG.getNode(ISD::ZERO_EXTEND, DL, NewVT, Op0); | |||
30178 | Op = DAG.getNode(ISD::CTPOP, DL, NewVT, Op); | |||
30179 | return DAG.getNode(ISD::TRUNCATE, DL, VT, Op); | |||
30180 | } | |||
30181 | } | |||
30182 | ||||
30183 | // Decompose 256-bit ops into smaller 128-bit ops. | |||
30184 | if (VT.is256BitVector() && !Subtarget.hasInt256()) | |||
30185 | return splitVectorIntUnary(Op, DAG); | |||
30186 | ||||
30187 | // Decompose 512-bit ops into smaller 256-bit ops. | |||
30188 | if (VT.is512BitVector() && !Subtarget.hasBWI()) | |||
30189 | return splitVectorIntUnary(Op, DAG); | |||
30190 | ||||
30191 | // For element types greater than i8, do vXi8 pop counts and a bytesum. | |||
30192 | if (VT.getScalarType() != MVT::i8) { | |||
30193 | MVT ByteVT = MVT::getVectorVT(MVT::i8, VT.getSizeInBits() / 8); | |||
30194 | SDValue ByteOp = DAG.getBitcast(ByteVT, Op0); | |||
30195 | SDValue PopCnt8 = DAG.getNode(ISD::CTPOP, DL, ByteVT, ByteOp); | |||
30196 | return LowerHorizontalByteSum(PopCnt8, VT, Subtarget, DAG); | |||
30197 | } | |||
30198 | ||||
30199 | // We can't use the fast LUT approach, so fall back on LegalizeDAG. | |||
30200 | if (!Subtarget.hasSSSE3()) | |||
30201 | return SDValue(); | |||
30202 | ||||
30203 | return LowerVectorCTPOPInRegLUT(Op0, DL, Subtarget, DAG); | |||
30204 | } | |||
30205 | ||||
30206 | static SDValue LowerCTPOP(SDValue Op, const X86Subtarget &Subtarget, | |||
30207 | SelectionDAG &DAG) { | |||
30208 | assert(Op.getSimpleValueType().isVector() &&(static_cast <bool> (Op.getSimpleValueType().isVector() && "We only do custom lowering for vector population count." ) ? void (0) : __assert_fail ("Op.getSimpleValueType().isVector() && \"We only do custom lowering for vector population count.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30209, __extension__ __PRETTY_FUNCTION__)) | |||
30209 | "We only do custom lowering for vector population count.")(static_cast <bool> (Op.getSimpleValueType().isVector() && "We only do custom lowering for vector population count." ) ? void (0) : __assert_fail ("Op.getSimpleValueType().isVector() && \"We only do custom lowering for vector population count.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30209, __extension__ __PRETTY_FUNCTION__)); | |||
30210 | return LowerVectorCTPOP(Op, Subtarget, DAG); | |||
30211 | } | |||
30212 | ||||
30213 | static SDValue LowerBITREVERSE_XOP(SDValue Op, SelectionDAG &DAG) { | |||
30214 | MVT VT = Op.getSimpleValueType(); | |||
30215 | SDValue In = Op.getOperand(0); | |||
30216 | SDLoc DL(Op); | |||
30217 | ||||
30218 | // For scalars, its still beneficial to transfer to/from the SIMD unit to | |||
30219 | // perform the BITREVERSE. | |||
30220 | if (!VT.isVector()) { | |||
30221 | MVT VecVT = MVT::getVectorVT(VT, 128 / VT.getSizeInBits()); | |||
30222 | SDValue Res = DAG.getNode(ISD::SCALAR_TO_VECTOR, DL, VecVT, In); | |||
30223 | Res = DAG.getNode(ISD::BITREVERSE, DL, VecVT, Res); | |||
30224 | return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, VT, Res, | |||
30225 | DAG.getIntPtrConstant(0, DL)); | |||
30226 | } | |||
30227 | ||||
30228 | int NumElts = VT.getVectorNumElements(); | |||
30229 | int ScalarSizeInBytes = VT.getScalarSizeInBits() / 8; | |||
30230 | ||||
30231 | // Decompose 256-bit ops into smaller 128-bit ops. | |||
30232 | if (VT.is256BitVector()) | |||
30233 | return splitVectorIntUnary(Op, DAG); | |||
30234 | ||||
30235 | assert(VT.is128BitVector() &&(static_cast <bool> (VT.is128BitVector() && "Only 128-bit vector bitreverse lowering supported." ) ? void (0) : __assert_fail ("VT.is128BitVector() && \"Only 128-bit vector bitreverse lowering supported.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30236, __extension__ __PRETTY_FUNCTION__)) | |||
30236 | "Only 128-bit vector bitreverse lowering supported.")(static_cast <bool> (VT.is128BitVector() && "Only 128-bit vector bitreverse lowering supported." ) ? void (0) : __assert_fail ("VT.is128BitVector() && \"Only 128-bit vector bitreverse lowering supported.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30236, __extension__ __PRETTY_FUNCTION__)); | |||
30237 | ||||
30238 | // VPPERM reverses the bits of a byte with the permute Op (2 << 5), and we | |||
30239 | // perform the BSWAP in the shuffle. | |||
30240 | // Its best to shuffle using the second operand as this will implicitly allow | |||
30241 | // memory folding for multiple vectors. | |||
30242 | SmallVector<SDValue, 16> MaskElts; | |||
30243 | for (int i = 0; i != NumElts; ++i) { | |||
30244 | for (int j = ScalarSizeInBytes - 1; j >= 0; --j) { | |||
30245 | int SourceByte = 16 + (i * ScalarSizeInBytes) + j; | |||
30246 | int PermuteByte = SourceByte | (2 << 5); | |||
30247 | MaskElts.push_back(DAG.getConstant(PermuteByte, DL, MVT::i8)); | |||
30248 | } | |||
30249 | } | |||
30250 | ||||
30251 | SDValue Mask = DAG.getBuildVector(MVT::v16i8, DL, MaskElts); | |||
30252 | SDValue Res = DAG.getBitcast(MVT::v16i8, In); | |||
30253 | Res = DAG.getNode(X86ISD::VPPERM, DL, MVT::v16i8, DAG.getUNDEF(MVT::v16i8), | |||
30254 | Res, Mask); | |||
30255 | return DAG.getBitcast(VT, Res); | |||
30256 | } | |||
30257 | ||||
30258 | static SDValue LowerBITREVERSE(SDValue Op, const X86Subtarget &Subtarget, | |||
30259 | SelectionDAG &DAG) { | |||
30260 | MVT VT = Op.getSimpleValueType(); | |||
30261 | ||||
30262 | if (Subtarget.hasXOP() && !VT.is512BitVector()) | |||
30263 | return LowerBITREVERSE_XOP(Op, DAG); | |||
30264 | ||||
30265 | assert(Subtarget.hasSSSE3() && "SSSE3 required for BITREVERSE")(static_cast <bool> (Subtarget.hasSSSE3() && "SSSE3 required for BITREVERSE" ) ? void (0) : __assert_fail ("Subtarget.hasSSSE3() && \"SSSE3 required for BITREVERSE\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30265, __extension__ __PRETTY_FUNCTION__)); | |||
30266 | ||||
30267 | SDValue In = Op.getOperand(0); | |||
30268 | SDLoc DL(Op); | |||
30269 | ||||
30270 | assert(VT.getScalarType() == MVT::i8 &&(static_cast <bool> (VT.getScalarType() == MVT::i8 && "Only byte vector BITREVERSE supported") ? void (0) : __assert_fail ("VT.getScalarType() == MVT::i8 && \"Only byte vector BITREVERSE supported\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30271, __extension__ __PRETTY_FUNCTION__)) | |||
30271 | "Only byte vector BITREVERSE supported")(static_cast <bool> (VT.getScalarType() == MVT::i8 && "Only byte vector BITREVERSE supported") ? void (0) : __assert_fail ("VT.getScalarType() == MVT::i8 && \"Only byte vector BITREVERSE supported\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30271, __extension__ __PRETTY_FUNCTION__)); | |||
30272 | ||||
30273 | // Split v64i8 without BWI so that we can still use the PSHUFB lowering. | |||
30274 | if (VT == MVT::v64i8 && !Subtarget.hasBWI()) | |||
30275 | return splitVectorIntUnary(Op, DAG); | |||
30276 | ||||
30277 | // Decompose 256-bit ops into smaller 128-bit ops on pre-AVX2. | |||
30278 | if (VT == MVT::v32i8 && !Subtarget.hasInt256()) | |||
30279 | return splitVectorIntUnary(Op, DAG); | |||
30280 | ||||
30281 | unsigned NumElts = VT.getVectorNumElements(); | |||
30282 | ||||
30283 | // If we have GFNI, we can use GF2P8AFFINEQB to reverse the bits. | |||
30284 | if (Subtarget.hasGFNI()) { | |||
30285 | MVT MatrixVT = MVT::getVectorVT(MVT::i64, NumElts / 8); | |||
30286 | SDValue Matrix = DAG.getConstant(0x8040201008040201ULL, DL, MatrixVT); | |||
30287 | Matrix = DAG.getBitcast(VT, Matrix); | |||
30288 | return DAG.getNode(X86ISD::GF2P8AFFINEQB, DL, VT, In, Matrix, | |||
30289 | DAG.getTargetConstant(0, DL, MVT::i8)); | |||
30290 | } | |||
30291 | ||||
30292 | // Perform BITREVERSE using PSHUFB lookups. Each byte is split into | |||
30293 | // two nibbles and a PSHUFB lookup to find the bitreverse of each | |||
30294 | // 0-15 value (moved to the other nibble). | |||
30295 | SDValue NibbleMask = DAG.getConstant(0xF, DL, VT); | |||
30296 | SDValue Lo = DAG.getNode(ISD::AND, DL, VT, In, NibbleMask); | |||
30297 | SDValue Hi = DAG.getNode(ISD::SRL, DL, VT, In, DAG.getConstant(4, DL, VT)); | |||
30298 | ||||
30299 | const int LoLUT[16] = { | |||
30300 | /* 0 */ 0x00, /* 1 */ 0x80, /* 2 */ 0x40, /* 3 */ 0xC0, | |||
30301 | /* 4 */ 0x20, /* 5 */ 0xA0, /* 6 */ 0x60, /* 7 */ 0xE0, | |||
30302 | /* 8 */ 0x10, /* 9 */ 0x90, /* a */ 0x50, /* b */ 0xD0, | |||
30303 | /* c */ 0x30, /* d */ 0xB0, /* e */ 0x70, /* f */ 0xF0}; | |||
30304 | const int HiLUT[16] = { | |||
30305 | /* 0 */ 0x00, /* 1 */ 0x08, /* 2 */ 0x04, /* 3 */ 0x0C, | |||
30306 | /* 4 */ 0x02, /* 5 */ 0x0A, /* 6 */ 0x06, /* 7 */ 0x0E, | |||
30307 | /* 8 */ 0x01, /* 9 */ 0x09, /* a */ 0x05, /* b */ 0x0D, | |||
30308 | /* c */ 0x03, /* d */ 0x0B, /* e */ 0x07, /* f */ 0x0F}; | |||
30309 | ||||
30310 | SmallVector<SDValue, 16> LoMaskElts, HiMaskElts; | |||
30311 | for (unsigned i = 0; i < NumElts; ++i) { | |||
30312 | LoMaskElts.push_back(DAG.getConstant(LoLUT[i % 16], DL, MVT::i8)); | |||
30313 | HiMaskElts.push_back(DAG.getConstant(HiLUT[i % 16], DL, MVT::i8)); | |||
30314 | } | |||
30315 | ||||
30316 | SDValue LoMask = DAG.getBuildVector(VT, DL, LoMaskElts); | |||
30317 | SDValue HiMask = DAG.getBuildVector(VT, DL, HiMaskElts); | |||
30318 | Lo = DAG.getNode(X86ISD::PSHUFB, DL, VT, LoMask, Lo); | |||
30319 | Hi = DAG.getNode(X86ISD::PSHUFB, DL, VT, HiMask, Hi); | |||
30320 | return DAG.getNode(ISD::OR, DL, VT, Lo, Hi); | |||
30321 | } | |||
30322 | ||||
30323 | static SDValue LowerPARITY(SDValue Op, const X86Subtarget &Subtarget, | |||
30324 | SelectionDAG &DAG) { | |||
30325 | SDLoc DL(Op); | |||
30326 | SDValue X = Op.getOperand(0); | |||
30327 | MVT VT = Op.getSimpleValueType(); | |||
30328 | ||||
30329 | // Special case. If the input fits in 8-bits we can use a single 8-bit TEST. | |||
30330 | if (VT == MVT::i8 || | |||
30331 | DAG.MaskedValueIsZero(X, APInt::getBitsSetFrom(VT.getSizeInBits(), 8))) { | |||
30332 | X = DAG.getNode(ISD::TRUNCATE, DL, MVT::i8, X); | |||
30333 | SDValue Flags = DAG.getNode(X86ISD::CMP, DL, MVT::i32, X, | |||
30334 | DAG.getConstant(0, DL, MVT::i8)); | |||
30335 | // Copy the inverse of the parity flag into a register with setcc. | |||
30336 | SDValue Setnp = getSETCC(X86::COND_NP, Flags, DL, DAG); | |||
30337 | // Extend to the original type. | |||
30338 | return DAG.getNode(ISD::ZERO_EXTEND, DL, VT, Setnp); | |||
30339 | } | |||
30340 | ||||
30341 | if (VT == MVT::i64) { | |||
30342 | // Xor the high and low 16-bits together using a 32-bit operation. | |||
30343 | SDValue Hi = DAG.getNode(ISD::TRUNCATE, DL, MVT::i32, | |||
30344 | DAG.getNode(ISD::SRL, DL, MVT::i64, X, | |||
30345 | DAG.getConstant(32, DL, MVT::i8))); | |||
30346 | SDValue Lo = DAG.getNode(ISD::TRUNCATE, DL, MVT::i32, X); | |||
30347 | X = DAG.getNode(ISD::XOR, DL, MVT::i32, Lo, Hi); | |||
30348 | } | |||
30349 | ||||
30350 | if (VT != MVT::i16) { | |||
30351 | // Xor the high and low 16-bits together using a 32-bit operation. | |||
30352 | SDValue Hi16 = DAG.getNode(ISD::SRL, DL, MVT::i32, X, | |||
30353 | DAG.getConstant(16, DL, MVT::i8)); | |||
30354 | X = DAG.getNode(ISD::XOR, DL, MVT::i32, X, Hi16); | |||
30355 | } else { | |||
30356 | // If the input is 16-bits, we need to extend to use an i32 shift below. | |||
30357 | X = DAG.getNode(ISD::ANY_EXTEND, DL, MVT::i32, X); | |||
30358 | } | |||
30359 | ||||
30360 | // Finally xor the low 2 bytes together and use a 8-bit flag setting xor. | |||
30361 | // This should allow an h-reg to be used to save a shift. | |||
30362 | SDValue Hi = DAG.getNode( | |||
30363 | ISD::TRUNCATE, DL, MVT::i8, | |||
30364 | DAG.getNode(ISD::SRL, DL, MVT::i32, X, DAG.getConstant(8, DL, MVT::i8))); | |||
30365 | SDValue Lo = DAG.getNode(ISD::TRUNCATE, DL, MVT::i8, X); | |||
30366 | SDVTList VTs = DAG.getVTList(MVT::i8, MVT::i32); | |||
30367 | SDValue Flags = DAG.getNode(X86ISD::XOR, DL, VTs, Lo, Hi).getValue(1); | |||
30368 | ||||
30369 | // Copy the inverse of the parity flag into a register with setcc. | |||
30370 | SDValue Setnp = getSETCC(X86::COND_NP, Flags, DL, DAG); | |||
30371 | // Extend to the original type. | |||
30372 | return DAG.getNode(ISD::ZERO_EXTEND, DL, VT, Setnp); | |||
30373 | } | |||
30374 | ||||
30375 | static SDValue lowerAtomicArithWithLOCK(SDValue N, SelectionDAG &DAG, | |||
30376 | const X86Subtarget &Subtarget) { | |||
30377 | unsigned NewOpc = 0; | |||
30378 | switch (N->getOpcode()) { | |||
30379 | case ISD::ATOMIC_LOAD_ADD: | |||
30380 | NewOpc = X86ISD::LADD; | |||
30381 | break; | |||
30382 | case ISD::ATOMIC_LOAD_SUB: | |||
30383 | NewOpc = X86ISD::LSUB; | |||
30384 | break; | |||
30385 | case ISD::ATOMIC_LOAD_OR: | |||
30386 | NewOpc = X86ISD::LOR; | |||
30387 | break; | |||
30388 | case ISD::ATOMIC_LOAD_XOR: | |||
30389 | NewOpc = X86ISD::LXOR; | |||
30390 | break; | |||
30391 | case ISD::ATOMIC_LOAD_AND: | |||
30392 | NewOpc = X86ISD::LAND; | |||
30393 | break; | |||
30394 | default: | |||
30395 | llvm_unreachable("Unknown ATOMIC_LOAD_ opcode")::llvm::llvm_unreachable_internal("Unknown ATOMIC_LOAD_ opcode" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30395); | |||
30396 | } | |||
30397 | ||||
30398 | MachineMemOperand *MMO = cast<MemSDNode>(N)->getMemOperand(); | |||
30399 | ||||
30400 | return DAG.getMemIntrinsicNode( | |||
30401 | NewOpc, SDLoc(N), DAG.getVTList(MVT::i32, MVT::Other), | |||
30402 | {N->getOperand(0), N->getOperand(1), N->getOperand(2)}, | |||
30403 | /*MemVT=*/N->getSimpleValueType(0), MMO); | |||
30404 | } | |||
30405 | ||||
30406 | /// Lower atomic_load_ops into LOCK-prefixed operations. | |||
30407 | static SDValue lowerAtomicArith(SDValue N, SelectionDAG &DAG, | |||
30408 | const X86Subtarget &Subtarget) { | |||
30409 | AtomicSDNode *AN = cast<AtomicSDNode>(N.getNode()); | |||
30410 | SDValue Chain = N->getOperand(0); | |||
30411 | SDValue LHS = N->getOperand(1); | |||
30412 | SDValue RHS = N->getOperand(2); | |||
30413 | unsigned Opc = N->getOpcode(); | |||
30414 | MVT VT = N->getSimpleValueType(0); | |||
30415 | SDLoc DL(N); | |||
30416 | ||||
30417 | // We can lower atomic_load_add into LXADD. However, any other atomicrmw op | |||
30418 | // can only be lowered when the result is unused. They should have already | |||
30419 | // been transformed into a cmpxchg loop in AtomicExpand. | |||
30420 | if (N->hasAnyUseOfValue(0)) { | |||
30421 | // Handle (atomic_load_sub p, v) as (atomic_load_add p, -v), to be able to | |||
30422 | // select LXADD if LOCK_SUB can't be selected. | |||
30423 | if (Opc == ISD::ATOMIC_LOAD_SUB) { | |||
30424 | RHS = DAG.getNode(ISD::SUB, DL, VT, DAG.getConstant(0, DL, VT), RHS); | |||
30425 | return DAG.getAtomic(ISD::ATOMIC_LOAD_ADD, DL, VT, Chain, LHS, | |||
30426 | RHS, AN->getMemOperand()); | |||
30427 | } | |||
30428 | assert(Opc == ISD::ATOMIC_LOAD_ADD &&(static_cast <bool> (Opc == ISD::ATOMIC_LOAD_ADD && "Used AtomicRMW ops other than Add should have been expanded!" ) ? void (0) : __assert_fail ("Opc == ISD::ATOMIC_LOAD_ADD && \"Used AtomicRMW ops other than Add should have been expanded!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30429, __extension__ __PRETTY_FUNCTION__)) | |||
30429 | "Used AtomicRMW ops other than Add should have been expanded!")(static_cast <bool> (Opc == ISD::ATOMIC_LOAD_ADD && "Used AtomicRMW ops other than Add should have been expanded!" ) ? void (0) : __assert_fail ("Opc == ISD::ATOMIC_LOAD_ADD && \"Used AtomicRMW ops other than Add should have been expanded!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30429, __extension__ __PRETTY_FUNCTION__)); | |||
30430 | return N; | |||
30431 | } | |||
30432 | ||||
30433 | // Specialized lowering for the canonical form of an idemptotent atomicrmw. | |||
30434 | // The core idea here is that since the memory location isn't actually | |||
30435 | // changing, all we need is a lowering for the *ordering* impacts of the | |||
30436 | // atomicrmw. As such, we can chose a different operation and memory | |||
30437 | // location to minimize impact on other code. | |||
30438 | if (Opc == ISD::ATOMIC_LOAD_OR && isNullConstant(RHS)) { | |||
30439 | // On X86, the only ordering which actually requires an instruction is | |||
30440 | // seq_cst which isn't SingleThread, everything just needs to be preserved | |||
30441 | // during codegen and then dropped. Note that we expect (but don't assume), | |||
30442 | // that orderings other than seq_cst and acq_rel have been canonicalized to | |||
30443 | // a store or load. | |||
30444 | if (AN->getSuccessOrdering() == AtomicOrdering::SequentiallyConsistent && | |||
30445 | AN->getSyncScopeID() == SyncScope::System) { | |||
30446 | // Prefer a locked operation against a stack location to minimize cache | |||
30447 | // traffic. This assumes that stack locations are very likely to be | |||
30448 | // accessed only by the owning thread. | |||
30449 | SDValue NewChain = emitLockedStackOp(DAG, Subtarget, Chain, DL); | |||
30450 | assert(!N->hasAnyUseOfValue(0))(static_cast <bool> (!N->hasAnyUseOfValue(0)) ? void (0) : __assert_fail ("!N->hasAnyUseOfValue(0)", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30450, __extension__ __PRETTY_FUNCTION__)); | |||
30451 | // NOTE: The getUNDEF is needed to give something for the unused result 0. | |||
30452 | return DAG.getNode(ISD::MERGE_VALUES, DL, N->getVTList(), | |||
30453 | DAG.getUNDEF(VT), NewChain); | |||
30454 | } | |||
30455 | // MEMBARRIER is a compiler barrier; it codegens to a no-op. | |||
30456 | SDValue NewChain = DAG.getNode(X86ISD::MEMBARRIER, DL, MVT::Other, Chain); | |||
30457 | assert(!N->hasAnyUseOfValue(0))(static_cast <bool> (!N->hasAnyUseOfValue(0)) ? void (0) : __assert_fail ("!N->hasAnyUseOfValue(0)", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30457, __extension__ __PRETTY_FUNCTION__)); | |||
30458 | // NOTE: The getUNDEF is needed to give something for the unused result 0. | |||
30459 | return DAG.getNode(ISD::MERGE_VALUES, DL, N->getVTList(), | |||
30460 | DAG.getUNDEF(VT), NewChain); | |||
30461 | } | |||
30462 | ||||
30463 | SDValue LockOp = lowerAtomicArithWithLOCK(N, DAG, Subtarget); | |||
30464 | // RAUW the chain, but don't worry about the result, as it's unused. | |||
30465 | assert(!N->hasAnyUseOfValue(0))(static_cast <bool> (!N->hasAnyUseOfValue(0)) ? void (0) : __assert_fail ("!N->hasAnyUseOfValue(0)", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30465, __extension__ __PRETTY_FUNCTION__)); | |||
30466 | // NOTE: The getUNDEF is needed to give something for the unused result 0. | |||
30467 | return DAG.getNode(ISD::MERGE_VALUES, DL, N->getVTList(), | |||
30468 | DAG.getUNDEF(VT), LockOp.getValue(1)); | |||
30469 | } | |||
30470 | ||||
30471 | static SDValue LowerATOMIC_STORE(SDValue Op, SelectionDAG &DAG, | |||
30472 | const X86Subtarget &Subtarget) { | |||
30473 | auto *Node = cast<AtomicSDNode>(Op.getNode()); | |||
30474 | SDLoc dl(Node); | |||
30475 | EVT VT = Node->getMemoryVT(); | |||
30476 | ||||
30477 | bool IsSeqCst = | |||
30478 | Node->getSuccessOrdering() == AtomicOrdering::SequentiallyConsistent; | |||
30479 | bool IsTypeLegal = DAG.getTargetLoweringInfo().isTypeLegal(VT); | |||
30480 | ||||
30481 | // If this store is not sequentially consistent and the type is legal | |||
30482 | // we can just keep it. | |||
30483 | if (!IsSeqCst && IsTypeLegal) | |||
30484 | return Op; | |||
30485 | ||||
30486 | if (VT == MVT::i64 && !IsTypeLegal) { | |||
30487 | // For illegal i64 atomic_stores, we can try to use MOVQ or MOVLPS if SSE | |||
30488 | // is enabled. | |||
30489 | bool NoImplicitFloatOps = | |||
30490 | DAG.getMachineFunction().getFunction().hasFnAttribute( | |||
30491 | Attribute::NoImplicitFloat); | |||
30492 | if (!Subtarget.useSoftFloat() && !NoImplicitFloatOps) { | |||
30493 | SDValue Chain; | |||
30494 | if (Subtarget.hasSSE1()) { | |||
30495 | SDValue SclToVec = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2i64, | |||
30496 | Node->getOperand(2)); | |||
30497 | MVT StVT = Subtarget.hasSSE2() ? MVT::v2i64 : MVT::v4f32; | |||
30498 | SclToVec = DAG.getBitcast(StVT, SclToVec); | |||
30499 | SDVTList Tys = DAG.getVTList(MVT::Other); | |||
30500 | SDValue Ops[] = {Node->getChain(), SclToVec, Node->getBasePtr()}; | |||
30501 | Chain = DAG.getMemIntrinsicNode(X86ISD::VEXTRACT_STORE, dl, Tys, Ops, | |||
30502 | MVT::i64, Node->getMemOperand()); | |||
30503 | } else if (Subtarget.hasX87()) { | |||
30504 | // First load this into an 80-bit X87 register using a stack temporary. | |||
30505 | // This will put the whole integer into the significand. | |||
30506 | SDValue StackPtr = DAG.CreateStackTemporary(MVT::i64); | |||
30507 | int SPFI = cast<FrameIndexSDNode>(StackPtr.getNode())->getIndex(); | |||
30508 | MachinePointerInfo MPI = | |||
30509 | MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), SPFI); | |||
30510 | Chain = | |||
30511 | DAG.getStore(Node->getChain(), dl, Node->getOperand(2), StackPtr, | |||
30512 | MPI, MaybeAlign(), MachineMemOperand::MOStore); | |||
30513 | SDVTList Tys = DAG.getVTList(MVT::f80, MVT::Other); | |||
30514 | SDValue LdOps[] = {Chain, StackPtr}; | |||
30515 | SDValue Value = | |||
30516 | DAG.getMemIntrinsicNode(X86ISD::FILD, dl, Tys, LdOps, MVT::i64, MPI, | |||
30517 | /*Align*/ None, MachineMemOperand::MOLoad); | |||
30518 | Chain = Value.getValue(1); | |||
30519 | ||||
30520 | // Now use an FIST to do the atomic store. | |||
30521 | SDValue StoreOps[] = {Chain, Value, Node->getBasePtr()}; | |||
30522 | Chain = | |||
30523 | DAG.getMemIntrinsicNode(X86ISD::FIST, dl, DAG.getVTList(MVT::Other), | |||
30524 | StoreOps, MVT::i64, Node->getMemOperand()); | |||
30525 | } | |||
30526 | ||||
30527 | if (Chain) { | |||
30528 | // If this is a sequentially consistent store, also emit an appropriate | |||
30529 | // barrier. | |||
30530 | if (IsSeqCst) | |||
30531 | Chain = emitLockedStackOp(DAG, Subtarget, Chain, dl); | |||
30532 | ||||
30533 | return Chain; | |||
30534 | } | |||
30535 | } | |||
30536 | } | |||
30537 | ||||
30538 | // Convert seq_cst store -> xchg | |||
30539 | // Convert wide store -> swap (-> cmpxchg8b/cmpxchg16b) | |||
30540 | // FIXME: 16-byte ATOMIC_SWAP isn't actually hooked up at the moment. | |||
30541 | SDValue Swap = DAG.getAtomic(ISD::ATOMIC_SWAP, dl, | |||
30542 | Node->getMemoryVT(), | |||
30543 | Node->getOperand(0), | |||
30544 | Node->getOperand(1), Node->getOperand(2), | |||
30545 | Node->getMemOperand()); | |||
30546 | return Swap.getValue(1); | |||
30547 | } | |||
30548 | ||||
30549 | static SDValue LowerADDSUBCARRY(SDValue Op, SelectionDAG &DAG) { | |||
30550 | SDNode *N = Op.getNode(); | |||
30551 | MVT VT = N->getSimpleValueType(0); | |||
30552 | unsigned Opc = Op.getOpcode(); | |||
30553 | ||||
30554 | // Let legalize expand this if it isn't a legal type yet. | |||
30555 | if (!DAG.getTargetLoweringInfo().isTypeLegal(VT)) | |||
30556 | return SDValue(); | |||
30557 | ||||
30558 | SDVTList VTs = DAG.getVTList(VT, MVT::i32); | |||
30559 | SDLoc DL(N); | |||
30560 | ||||
30561 | // Set the carry flag. | |||
30562 | SDValue Carry = Op.getOperand(2); | |||
30563 | EVT CarryVT = Carry.getValueType(); | |||
30564 | Carry = DAG.getNode(X86ISD::ADD, DL, DAG.getVTList(CarryVT, MVT::i32), | |||
30565 | Carry, DAG.getAllOnesConstant(DL, CarryVT)); | |||
30566 | ||||
30567 | bool IsAdd = Opc == ISD::ADDCARRY || Opc == ISD::SADDO_CARRY; | |||
30568 | SDValue Sum = DAG.getNode(IsAdd ? X86ISD::ADC : X86ISD::SBB, DL, VTs, | |||
30569 | Op.getOperand(0), Op.getOperand(1), | |||
30570 | Carry.getValue(1)); | |||
30571 | ||||
30572 | bool IsSigned = Opc == ISD::SADDO_CARRY || Opc == ISD::SSUBO_CARRY; | |||
30573 | SDValue SetCC = getSETCC(IsSigned ? X86::COND_O : X86::COND_B, | |||
30574 | Sum.getValue(1), DL, DAG); | |||
30575 | if (N->getValueType(1) == MVT::i1) | |||
30576 | SetCC = DAG.getNode(ISD::TRUNCATE, DL, MVT::i1, SetCC); | |||
30577 | ||||
30578 | return DAG.getNode(ISD::MERGE_VALUES, DL, N->getVTList(), Sum, SetCC); | |||
30579 | } | |||
30580 | ||||
30581 | static SDValue LowerFSINCOS(SDValue Op, const X86Subtarget &Subtarget, | |||
30582 | SelectionDAG &DAG) { | |||
30583 | assert(Subtarget.isTargetDarwin() && Subtarget.is64Bit())(static_cast <bool> (Subtarget.isTargetDarwin() && Subtarget.is64Bit()) ? void (0) : __assert_fail ("Subtarget.isTargetDarwin() && Subtarget.is64Bit()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30583, __extension__ __PRETTY_FUNCTION__)); | |||
30584 | ||||
30585 | // For MacOSX, we want to call an alternative entry point: __sincos_stret, | |||
30586 | // which returns the values as { float, float } (in XMM0) or | |||
30587 | // { double, double } (which is returned in XMM0, XMM1). | |||
30588 | SDLoc dl(Op); | |||
30589 | SDValue Arg = Op.getOperand(0); | |||
30590 | EVT ArgVT = Arg.getValueType(); | |||
30591 | Type *ArgTy = ArgVT.getTypeForEVT(*DAG.getContext()); | |||
30592 | ||||
30593 | TargetLowering::ArgListTy Args; | |||
30594 | TargetLowering::ArgListEntry Entry; | |||
30595 | ||||
30596 | Entry.Node = Arg; | |||
30597 | Entry.Ty = ArgTy; | |||
30598 | Entry.IsSExt = false; | |||
30599 | Entry.IsZExt = false; | |||
30600 | Args.push_back(Entry); | |||
30601 | ||||
30602 | bool isF64 = ArgVT == MVT::f64; | |||
30603 | // Only optimize x86_64 for now. i386 is a bit messy. For f32, | |||
30604 | // the small struct {f32, f32} is returned in (eax, edx). For f64, | |||
30605 | // the results are returned via SRet in memory. | |||
30606 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
30607 | RTLIB::Libcall LC = isF64 ? RTLIB::SINCOS_STRET_F64 : RTLIB::SINCOS_STRET_F32; | |||
30608 | const char *LibcallName = TLI.getLibcallName(LC); | |||
30609 | SDValue Callee = | |||
30610 | DAG.getExternalSymbol(LibcallName, TLI.getPointerTy(DAG.getDataLayout())); | |||
30611 | ||||
30612 | Type *RetTy = isF64 ? (Type *)StructType::get(ArgTy, ArgTy) | |||
30613 | : (Type *)FixedVectorType::get(ArgTy, 4); | |||
30614 | ||||
30615 | TargetLowering::CallLoweringInfo CLI(DAG); | |||
30616 | CLI.setDebugLoc(dl) | |||
30617 | .setChain(DAG.getEntryNode()) | |||
30618 | .setLibCallee(CallingConv::C, RetTy, Callee, std::move(Args)); | |||
30619 | ||||
30620 | std::pair<SDValue, SDValue> CallResult = TLI.LowerCallTo(CLI); | |||
30621 | ||||
30622 | if (isF64) | |||
30623 | // Returned in xmm0 and xmm1. | |||
30624 | return CallResult.first; | |||
30625 | ||||
30626 | // Returned in bits 0:31 and 32:64 xmm0. | |||
30627 | SDValue SinVal = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, ArgVT, | |||
30628 | CallResult.first, DAG.getIntPtrConstant(0, dl)); | |||
30629 | SDValue CosVal = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, ArgVT, | |||
30630 | CallResult.first, DAG.getIntPtrConstant(1, dl)); | |||
30631 | SDVTList Tys = DAG.getVTList(ArgVT, ArgVT); | |||
30632 | return DAG.getNode(ISD::MERGE_VALUES, dl, Tys, SinVal, CosVal); | |||
30633 | } | |||
30634 | ||||
30635 | /// Widen a vector input to a vector of NVT. The | |||
30636 | /// input vector must have the same element type as NVT. | |||
30637 | static SDValue ExtendToType(SDValue InOp, MVT NVT, SelectionDAG &DAG, | |||
30638 | bool FillWithZeroes = false) { | |||
30639 | // Check if InOp already has the right width. | |||
30640 | MVT InVT = InOp.getSimpleValueType(); | |||
30641 | if (InVT == NVT) | |||
30642 | return InOp; | |||
30643 | ||||
30644 | if (InOp.isUndef()) | |||
30645 | return DAG.getUNDEF(NVT); | |||
30646 | ||||
30647 | assert(InVT.getVectorElementType() == NVT.getVectorElementType() &&(static_cast <bool> (InVT.getVectorElementType() == NVT .getVectorElementType() && "input and widen element type must match" ) ? void (0) : __assert_fail ("InVT.getVectorElementType() == NVT.getVectorElementType() && \"input and widen element type must match\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30648, __extension__ __PRETTY_FUNCTION__)) | |||
30648 | "input and widen element type must match")(static_cast <bool> (InVT.getVectorElementType() == NVT .getVectorElementType() && "input and widen element type must match" ) ? void (0) : __assert_fail ("InVT.getVectorElementType() == NVT.getVectorElementType() && \"input and widen element type must match\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30648, __extension__ __PRETTY_FUNCTION__)); | |||
30649 | ||||
30650 | unsigned InNumElts = InVT.getVectorNumElements(); | |||
30651 | unsigned WidenNumElts = NVT.getVectorNumElements(); | |||
30652 | assert(WidenNumElts > InNumElts && WidenNumElts % InNumElts == 0 &&(static_cast <bool> (WidenNumElts > InNumElts && WidenNumElts % InNumElts == 0 && "Unexpected request for vector widening" ) ? void (0) : __assert_fail ("WidenNumElts > InNumElts && WidenNumElts % InNumElts == 0 && \"Unexpected request for vector widening\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30653, __extension__ __PRETTY_FUNCTION__)) | |||
30653 | "Unexpected request for vector widening")(static_cast <bool> (WidenNumElts > InNumElts && WidenNumElts % InNumElts == 0 && "Unexpected request for vector widening" ) ? void (0) : __assert_fail ("WidenNumElts > InNumElts && WidenNumElts % InNumElts == 0 && \"Unexpected request for vector widening\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30653, __extension__ __PRETTY_FUNCTION__)); | |||
30654 | ||||
30655 | SDLoc dl(InOp); | |||
30656 | if (InOp.getOpcode() == ISD::CONCAT_VECTORS && | |||
30657 | InOp.getNumOperands() == 2) { | |||
30658 | SDValue N1 = InOp.getOperand(1); | |||
30659 | if ((ISD::isBuildVectorAllZeros(N1.getNode()) && FillWithZeroes) || | |||
30660 | N1.isUndef()) { | |||
30661 | InOp = InOp.getOperand(0); | |||
30662 | InVT = InOp.getSimpleValueType(); | |||
30663 | InNumElts = InVT.getVectorNumElements(); | |||
30664 | } | |||
30665 | } | |||
30666 | if (ISD::isBuildVectorOfConstantSDNodes(InOp.getNode()) || | |||
30667 | ISD::isBuildVectorOfConstantFPSDNodes(InOp.getNode())) { | |||
30668 | SmallVector<SDValue, 16> Ops; | |||
30669 | for (unsigned i = 0; i < InNumElts; ++i) | |||
30670 | Ops.push_back(InOp.getOperand(i)); | |||
30671 | ||||
30672 | EVT EltVT = InOp.getOperand(0).getValueType(); | |||
30673 | ||||
30674 | SDValue FillVal = FillWithZeroes ? DAG.getConstant(0, dl, EltVT) : | |||
30675 | DAG.getUNDEF(EltVT); | |||
30676 | for (unsigned i = 0; i < WidenNumElts - InNumElts; ++i) | |||
30677 | Ops.push_back(FillVal); | |||
30678 | return DAG.getBuildVector(NVT, dl, Ops); | |||
30679 | } | |||
30680 | SDValue FillVal = FillWithZeroes ? DAG.getConstant(0, dl, NVT) : | |||
30681 | DAG.getUNDEF(NVT); | |||
30682 | return DAG.getNode(ISD::INSERT_SUBVECTOR, dl, NVT, FillVal, | |||
30683 | InOp, DAG.getIntPtrConstant(0, dl)); | |||
30684 | } | |||
30685 | ||||
30686 | static SDValue LowerMSCATTER(SDValue Op, const X86Subtarget &Subtarget, | |||
30687 | SelectionDAG &DAG) { | |||
30688 | assert(Subtarget.hasAVX512() &&(static_cast <bool> (Subtarget.hasAVX512() && "MGATHER/MSCATTER are supported on AVX-512 arch only" ) ? void (0) : __assert_fail ("Subtarget.hasAVX512() && \"MGATHER/MSCATTER are supported on AVX-512 arch only\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30689, __extension__ __PRETTY_FUNCTION__)) | |||
30689 | "MGATHER/MSCATTER are supported on AVX-512 arch only")(static_cast <bool> (Subtarget.hasAVX512() && "MGATHER/MSCATTER are supported on AVX-512 arch only" ) ? void (0) : __assert_fail ("Subtarget.hasAVX512() && \"MGATHER/MSCATTER are supported on AVX-512 arch only\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30689, __extension__ __PRETTY_FUNCTION__)); | |||
30690 | ||||
30691 | MaskedScatterSDNode *N = cast<MaskedScatterSDNode>(Op.getNode()); | |||
30692 | SDValue Src = N->getValue(); | |||
30693 | MVT VT = Src.getSimpleValueType(); | |||
30694 | assert(VT.getScalarSizeInBits() >= 32 && "Unsupported scatter op")(static_cast <bool> (VT.getScalarSizeInBits() >= 32 && "Unsupported scatter op") ? void (0) : __assert_fail ("VT.getScalarSizeInBits() >= 32 && \"Unsupported scatter op\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30694, __extension__ __PRETTY_FUNCTION__)); | |||
30695 | SDLoc dl(Op); | |||
30696 | ||||
30697 | SDValue Scale = N->getScale(); | |||
30698 | SDValue Index = N->getIndex(); | |||
30699 | SDValue Mask = N->getMask(); | |||
30700 | SDValue Chain = N->getChain(); | |||
30701 | SDValue BasePtr = N->getBasePtr(); | |||
30702 | ||||
30703 | if (VT == MVT::v2f32 || VT == MVT::v2i32) { | |||
30704 | assert(Mask.getValueType() == MVT::v2i1 && "Unexpected mask type")(static_cast <bool> (Mask.getValueType() == MVT::v2i1 && "Unexpected mask type") ? void (0) : __assert_fail ("Mask.getValueType() == MVT::v2i1 && \"Unexpected mask type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30704, __extension__ __PRETTY_FUNCTION__)); | |||
30705 | // If the index is v2i64 and we have VLX we can use xmm for data and index. | |||
30706 | if (Index.getValueType() == MVT::v2i64 && Subtarget.hasVLX()) { | |||
30707 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
30708 | EVT WideVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT); | |||
30709 | Src = DAG.getNode(ISD::CONCAT_VECTORS, dl, WideVT, Src, DAG.getUNDEF(VT)); | |||
30710 | SDVTList VTs = DAG.getVTList(MVT::Other); | |||
30711 | SDValue Ops[] = {Chain, Src, Mask, BasePtr, Index, Scale}; | |||
30712 | return DAG.getMemIntrinsicNode(X86ISD::MSCATTER, dl, VTs, Ops, | |||
30713 | N->getMemoryVT(), N->getMemOperand()); | |||
30714 | } | |||
30715 | return SDValue(); | |||
30716 | } | |||
30717 | ||||
30718 | MVT IndexVT = Index.getSimpleValueType(); | |||
30719 | ||||
30720 | // If the index is v2i32, we're being called by type legalization and we | |||
30721 | // should just let the default handling take care of it. | |||
30722 | if (IndexVT == MVT::v2i32) | |||
30723 | return SDValue(); | |||
30724 | ||||
30725 | // If we don't have VLX and neither the passthru or index is 512-bits, we | |||
30726 | // need to widen until one is. | |||
30727 | if (!Subtarget.hasVLX() && !VT.is512BitVector() && | |||
30728 | !Index.getSimpleValueType().is512BitVector()) { | |||
30729 | // Determine how much we need to widen by to get a 512-bit type. | |||
30730 | unsigned Factor = std::min(512/VT.getSizeInBits(), | |||
30731 | 512/IndexVT.getSizeInBits()); | |||
30732 | unsigned NumElts = VT.getVectorNumElements() * Factor; | |||
30733 | ||||
30734 | VT = MVT::getVectorVT(VT.getVectorElementType(), NumElts); | |||
30735 | IndexVT = MVT::getVectorVT(IndexVT.getVectorElementType(), NumElts); | |||
30736 | MVT MaskVT = MVT::getVectorVT(MVT::i1, NumElts); | |||
30737 | ||||
30738 | Src = ExtendToType(Src, VT, DAG); | |||
30739 | Index = ExtendToType(Index, IndexVT, DAG); | |||
30740 | Mask = ExtendToType(Mask, MaskVT, DAG, true); | |||
30741 | } | |||
30742 | ||||
30743 | SDVTList VTs = DAG.getVTList(MVT::Other); | |||
30744 | SDValue Ops[] = {Chain, Src, Mask, BasePtr, Index, Scale}; | |||
30745 | return DAG.getMemIntrinsicNode(X86ISD::MSCATTER, dl, VTs, Ops, | |||
30746 | N->getMemoryVT(), N->getMemOperand()); | |||
30747 | } | |||
30748 | ||||
30749 | static SDValue LowerMLOAD(SDValue Op, const X86Subtarget &Subtarget, | |||
30750 | SelectionDAG &DAG) { | |||
30751 | ||||
30752 | MaskedLoadSDNode *N = cast<MaskedLoadSDNode>(Op.getNode()); | |||
30753 | MVT VT = Op.getSimpleValueType(); | |||
30754 | MVT ScalarVT = VT.getScalarType(); | |||
30755 | SDValue Mask = N->getMask(); | |||
30756 | MVT MaskVT = Mask.getSimpleValueType(); | |||
30757 | SDValue PassThru = N->getPassThru(); | |||
30758 | SDLoc dl(Op); | |||
30759 | ||||
30760 | // Handle AVX masked loads which don't support passthru other than 0. | |||
30761 | if (MaskVT.getVectorElementType() != MVT::i1) { | |||
30762 | // We also allow undef in the isel pattern. | |||
30763 | if (PassThru.isUndef() || ISD::isBuildVectorAllZeros(PassThru.getNode())) | |||
30764 | return Op; | |||
30765 | ||||
30766 | SDValue NewLoad = DAG.getMaskedLoad( | |||
30767 | VT, dl, N->getChain(), N->getBasePtr(), N->getOffset(), Mask, | |||
30768 | getZeroVector(VT, Subtarget, DAG, dl), N->getMemoryVT(), | |||
30769 | N->getMemOperand(), N->getAddressingMode(), N->getExtensionType(), | |||
30770 | N->isExpandingLoad()); | |||
30771 | // Emit a blend. | |||
30772 | SDValue Select = DAG.getNode(ISD::VSELECT, dl, VT, Mask, NewLoad, PassThru); | |||
30773 | return DAG.getMergeValues({ Select, NewLoad.getValue(1) }, dl); | |||
30774 | } | |||
30775 | ||||
30776 | assert((!N->isExpandingLoad() || Subtarget.hasAVX512()) &&(static_cast <bool> ((!N->isExpandingLoad() || Subtarget .hasAVX512()) && "Expanding masked load is supported on AVX-512 target only!" ) ? void (0) : __assert_fail ("(!N->isExpandingLoad() || Subtarget.hasAVX512()) && \"Expanding masked load is supported on AVX-512 target only!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30777, __extension__ __PRETTY_FUNCTION__)) | |||
30777 | "Expanding masked load is supported on AVX-512 target only!")(static_cast <bool> ((!N->isExpandingLoad() || Subtarget .hasAVX512()) && "Expanding masked load is supported on AVX-512 target only!" ) ? void (0) : __assert_fail ("(!N->isExpandingLoad() || Subtarget.hasAVX512()) && \"Expanding masked load is supported on AVX-512 target only!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30777, __extension__ __PRETTY_FUNCTION__)); | |||
30778 | ||||
30779 | assert((!N->isExpandingLoad() || ScalarVT.getSizeInBits() >= 32) &&(static_cast <bool> ((!N->isExpandingLoad() || ScalarVT .getSizeInBits() >= 32) && "Expanding masked load is supported for 32 and 64-bit types only!" ) ? void (0) : __assert_fail ("(!N->isExpandingLoad() || ScalarVT.getSizeInBits() >= 32) && \"Expanding masked load is supported for 32 and 64-bit types only!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30780, __extension__ __PRETTY_FUNCTION__)) | |||
30780 | "Expanding masked load is supported for 32 and 64-bit types only!")(static_cast <bool> ((!N->isExpandingLoad() || ScalarVT .getSizeInBits() >= 32) && "Expanding masked load is supported for 32 and 64-bit types only!" ) ? void (0) : __assert_fail ("(!N->isExpandingLoad() || ScalarVT.getSizeInBits() >= 32) && \"Expanding masked load is supported for 32 and 64-bit types only!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30780, __extension__ __PRETTY_FUNCTION__)); | |||
30781 | ||||
30782 | assert(Subtarget.hasAVX512() && !Subtarget.hasVLX() && !VT.is512BitVector() &&(static_cast <bool> (Subtarget.hasAVX512() && ! Subtarget.hasVLX() && !VT.is512BitVector() && "Cannot lower masked load op.") ? void (0) : __assert_fail ( "Subtarget.hasAVX512() && !Subtarget.hasVLX() && !VT.is512BitVector() && \"Cannot lower masked load op.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30783, __extension__ __PRETTY_FUNCTION__)) | |||
30783 | "Cannot lower masked load op.")(static_cast <bool> (Subtarget.hasAVX512() && ! Subtarget.hasVLX() && !VT.is512BitVector() && "Cannot lower masked load op.") ? void (0) : __assert_fail ( "Subtarget.hasAVX512() && !Subtarget.hasVLX() && !VT.is512BitVector() && \"Cannot lower masked load op.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30783, __extension__ __PRETTY_FUNCTION__)); | |||
30784 | ||||
30785 | assert((ScalarVT.getSizeInBits() >= 32 ||(static_cast <bool> ((ScalarVT.getSizeInBits() >= 32 || (Subtarget.hasBWI() && (ScalarVT == MVT::i8 || ScalarVT == MVT::i16))) && "Unsupported masked load op.") ? void (0) : __assert_fail ("(ScalarVT.getSizeInBits() >= 32 || (Subtarget.hasBWI() && (ScalarVT == MVT::i8 || ScalarVT == MVT::i16))) && \"Unsupported masked load op.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30788, __extension__ __PRETTY_FUNCTION__)) | |||
30786 | (Subtarget.hasBWI() &&(static_cast <bool> ((ScalarVT.getSizeInBits() >= 32 || (Subtarget.hasBWI() && (ScalarVT == MVT::i8 || ScalarVT == MVT::i16))) && "Unsupported masked load op.") ? void (0) : __assert_fail ("(ScalarVT.getSizeInBits() >= 32 || (Subtarget.hasBWI() && (ScalarVT == MVT::i8 || ScalarVT == MVT::i16))) && \"Unsupported masked load op.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30788, __extension__ __PRETTY_FUNCTION__)) | |||
30787 | (ScalarVT == MVT::i8 || ScalarVT == MVT::i16))) &&(static_cast <bool> ((ScalarVT.getSizeInBits() >= 32 || (Subtarget.hasBWI() && (ScalarVT == MVT::i8 || ScalarVT == MVT::i16))) && "Unsupported masked load op.") ? void (0) : __assert_fail ("(ScalarVT.getSizeInBits() >= 32 || (Subtarget.hasBWI() && (ScalarVT == MVT::i8 || ScalarVT == MVT::i16))) && \"Unsupported masked load op.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30788, __extension__ __PRETTY_FUNCTION__)) | |||
30788 | "Unsupported masked load op.")(static_cast <bool> ((ScalarVT.getSizeInBits() >= 32 || (Subtarget.hasBWI() && (ScalarVT == MVT::i8 || ScalarVT == MVT::i16))) && "Unsupported masked load op.") ? void (0) : __assert_fail ("(ScalarVT.getSizeInBits() >= 32 || (Subtarget.hasBWI() && (ScalarVT == MVT::i8 || ScalarVT == MVT::i16))) && \"Unsupported masked load op.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30788, __extension__ __PRETTY_FUNCTION__)); | |||
30789 | ||||
30790 | // This operation is legal for targets with VLX, but without | |||
30791 | // VLX the vector should be widened to 512 bit | |||
30792 | unsigned NumEltsInWideVec = 512 / VT.getScalarSizeInBits(); | |||
30793 | MVT WideDataVT = MVT::getVectorVT(ScalarVT, NumEltsInWideVec); | |||
30794 | PassThru = ExtendToType(PassThru, WideDataVT, DAG); | |||
30795 | ||||
30796 | // Mask element has to be i1. | |||
30797 | assert(Mask.getSimpleValueType().getScalarType() == MVT::i1 &&(static_cast <bool> (Mask.getSimpleValueType().getScalarType () == MVT::i1 && "Unexpected mask type") ? void (0) : __assert_fail ("Mask.getSimpleValueType().getScalarType() == MVT::i1 && \"Unexpected mask type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30798, __extension__ __PRETTY_FUNCTION__)) | |||
30798 | "Unexpected mask type")(static_cast <bool> (Mask.getSimpleValueType().getScalarType () == MVT::i1 && "Unexpected mask type") ? void (0) : __assert_fail ("Mask.getSimpleValueType().getScalarType() == MVT::i1 && \"Unexpected mask type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30798, __extension__ __PRETTY_FUNCTION__)); | |||
30799 | ||||
30800 | MVT WideMaskVT = MVT::getVectorVT(MVT::i1, NumEltsInWideVec); | |||
30801 | ||||
30802 | Mask = ExtendToType(Mask, WideMaskVT, DAG, true); | |||
30803 | SDValue NewLoad = DAG.getMaskedLoad( | |||
30804 | WideDataVT, dl, N->getChain(), N->getBasePtr(), N->getOffset(), Mask, | |||
30805 | PassThru, N->getMemoryVT(), N->getMemOperand(), N->getAddressingMode(), | |||
30806 | N->getExtensionType(), N->isExpandingLoad()); | |||
30807 | ||||
30808 | SDValue Extract = | |||
30809 | DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT, NewLoad.getValue(0), | |||
30810 | DAG.getIntPtrConstant(0, dl)); | |||
30811 | SDValue RetOps[] = {Extract, NewLoad.getValue(1)}; | |||
30812 | return DAG.getMergeValues(RetOps, dl); | |||
30813 | } | |||
30814 | ||||
30815 | static SDValue LowerMSTORE(SDValue Op, const X86Subtarget &Subtarget, | |||
30816 | SelectionDAG &DAG) { | |||
30817 | MaskedStoreSDNode *N = cast<MaskedStoreSDNode>(Op.getNode()); | |||
30818 | SDValue DataToStore = N->getValue(); | |||
30819 | MVT VT = DataToStore.getSimpleValueType(); | |||
30820 | MVT ScalarVT = VT.getScalarType(); | |||
30821 | SDValue Mask = N->getMask(); | |||
30822 | SDLoc dl(Op); | |||
30823 | ||||
30824 | assert((!N->isCompressingStore() || Subtarget.hasAVX512()) &&(static_cast <bool> ((!N->isCompressingStore() || Subtarget .hasAVX512()) && "Expanding masked load is supported on AVX-512 target only!" ) ? void (0) : __assert_fail ("(!N->isCompressingStore() || Subtarget.hasAVX512()) && \"Expanding masked load is supported on AVX-512 target only!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30825, __extension__ __PRETTY_FUNCTION__)) | |||
30825 | "Expanding masked load is supported on AVX-512 target only!")(static_cast <bool> ((!N->isCompressingStore() || Subtarget .hasAVX512()) && "Expanding masked load is supported on AVX-512 target only!" ) ? void (0) : __assert_fail ("(!N->isCompressingStore() || Subtarget.hasAVX512()) && \"Expanding masked load is supported on AVX-512 target only!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30825, __extension__ __PRETTY_FUNCTION__)); | |||
30826 | ||||
30827 | assert((!N->isCompressingStore() || ScalarVT.getSizeInBits() >= 32) &&(static_cast <bool> ((!N->isCompressingStore() || ScalarVT .getSizeInBits() >= 32) && "Expanding masked load is supported for 32 and 64-bit types only!" ) ? void (0) : __assert_fail ("(!N->isCompressingStore() || ScalarVT.getSizeInBits() >= 32) && \"Expanding masked load is supported for 32 and 64-bit types only!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30828, __extension__ __PRETTY_FUNCTION__)) | |||
30828 | "Expanding masked load is supported for 32 and 64-bit types only!")(static_cast <bool> ((!N->isCompressingStore() || ScalarVT .getSizeInBits() >= 32) && "Expanding masked load is supported for 32 and 64-bit types only!" ) ? void (0) : __assert_fail ("(!N->isCompressingStore() || ScalarVT.getSizeInBits() >= 32) && \"Expanding masked load is supported for 32 and 64-bit types only!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30828, __extension__ __PRETTY_FUNCTION__)); | |||
30829 | ||||
30830 | assert(Subtarget.hasAVX512() && !Subtarget.hasVLX() && !VT.is512BitVector() &&(static_cast <bool> (Subtarget.hasAVX512() && ! Subtarget.hasVLX() && !VT.is512BitVector() && "Cannot lower masked store op.") ? void (0) : __assert_fail ( "Subtarget.hasAVX512() && !Subtarget.hasVLX() && !VT.is512BitVector() && \"Cannot lower masked store op.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30831, __extension__ __PRETTY_FUNCTION__)) | |||
30831 | "Cannot lower masked store op.")(static_cast <bool> (Subtarget.hasAVX512() && ! Subtarget.hasVLX() && !VT.is512BitVector() && "Cannot lower masked store op.") ? void (0) : __assert_fail ( "Subtarget.hasAVX512() && !Subtarget.hasVLX() && !VT.is512BitVector() && \"Cannot lower masked store op.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30831, __extension__ __PRETTY_FUNCTION__)); | |||
30832 | ||||
30833 | assert((ScalarVT.getSizeInBits() >= 32 ||(static_cast <bool> ((ScalarVT.getSizeInBits() >= 32 || (Subtarget.hasBWI() && (ScalarVT == MVT::i8 || ScalarVT == MVT::i16))) && "Unsupported masked store op.") ? void (0) : __assert_fail ("(ScalarVT.getSizeInBits() >= 32 || (Subtarget.hasBWI() && (ScalarVT == MVT::i8 || ScalarVT == MVT::i16))) && \"Unsupported masked store op.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30836, __extension__ __PRETTY_FUNCTION__)) | |||
30834 | (Subtarget.hasBWI() &&(static_cast <bool> ((ScalarVT.getSizeInBits() >= 32 || (Subtarget.hasBWI() && (ScalarVT == MVT::i8 || ScalarVT == MVT::i16))) && "Unsupported masked store op.") ? void (0) : __assert_fail ("(ScalarVT.getSizeInBits() >= 32 || (Subtarget.hasBWI() && (ScalarVT == MVT::i8 || ScalarVT == MVT::i16))) && \"Unsupported masked store op.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30836, __extension__ __PRETTY_FUNCTION__)) | |||
30835 | (ScalarVT == MVT::i8 || ScalarVT == MVT::i16))) &&(static_cast <bool> ((ScalarVT.getSizeInBits() >= 32 || (Subtarget.hasBWI() && (ScalarVT == MVT::i8 || ScalarVT == MVT::i16))) && "Unsupported masked store op.") ? void (0) : __assert_fail ("(ScalarVT.getSizeInBits() >= 32 || (Subtarget.hasBWI() && (ScalarVT == MVT::i8 || ScalarVT == MVT::i16))) && \"Unsupported masked store op.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30836, __extension__ __PRETTY_FUNCTION__)) | |||
30836 | "Unsupported masked store op.")(static_cast <bool> ((ScalarVT.getSizeInBits() >= 32 || (Subtarget.hasBWI() && (ScalarVT == MVT::i8 || ScalarVT == MVT::i16))) && "Unsupported masked store op.") ? void (0) : __assert_fail ("(ScalarVT.getSizeInBits() >= 32 || (Subtarget.hasBWI() && (ScalarVT == MVT::i8 || ScalarVT == MVT::i16))) && \"Unsupported masked store op.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30836, __extension__ __PRETTY_FUNCTION__)); | |||
30837 | ||||
30838 | // This operation is legal for targets with VLX, but without | |||
30839 | // VLX the vector should be widened to 512 bit | |||
30840 | unsigned NumEltsInWideVec = 512/VT.getScalarSizeInBits(); | |||
30841 | MVT WideDataVT = MVT::getVectorVT(ScalarVT, NumEltsInWideVec); | |||
30842 | ||||
30843 | // Mask element has to be i1. | |||
30844 | assert(Mask.getSimpleValueType().getScalarType() == MVT::i1 &&(static_cast <bool> (Mask.getSimpleValueType().getScalarType () == MVT::i1 && "Unexpected mask type") ? void (0) : __assert_fail ("Mask.getSimpleValueType().getScalarType() == MVT::i1 && \"Unexpected mask type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30845, __extension__ __PRETTY_FUNCTION__)) | |||
30845 | "Unexpected mask type")(static_cast <bool> (Mask.getSimpleValueType().getScalarType () == MVT::i1 && "Unexpected mask type") ? void (0) : __assert_fail ("Mask.getSimpleValueType().getScalarType() == MVT::i1 && \"Unexpected mask type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30845, __extension__ __PRETTY_FUNCTION__)); | |||
30846 | ||||
30847 | MVT WideMaskVT = MVT::getVectorVT(MVT::i1, NumEltsInWideVec); | |||
30848 | ||||
30849 | DataToStore = ExtendToType(DataToStore, WideDataVT, DAG); | |||
30850 | Mask = ExtendToType(Mask, WideMaskVT, DAG, true); | |||
30851 | return DAG.getMaskedStore(N->getChain(), dl, DataToStore, N->getBasePtr(), | |||
30852 | N->getOffset(), Mask, N->getMemoryVT(), | |||
30853 | N->getMemOperand(), N->getAddressingMode(), | |||
30854 | N->isTruncatingStore(), N->isCompressingStore()); | |||
30855 | } | |||
30856 | ||||
30857 | static SDValue LowerMGATHER(SDValue Op, const X86Subtarget &Subtarget, | |||
30858 | SelectionDAG &DAG) { | |||
30859 | assert(Subtarget.hasAVX2() &&(static_cast <bool> (Subtarget.hasAVX2() && "MGATHER/MSCATTER are supported on AVX-512/AVX-2 arch only" ) ? void (0) : __assert_fail ("Subtarget.hasAVX2() && \"MGATHER/MSCATTER are supported on AVX-512/AVX-2 arch only\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30860, __extension__ __PRETTY_FUNCTION__)) | |||
30860 | "MGATHER/MSCATTER are supported on AVX-512/AVX-2 arch only")(static_cast <bool> (Subtarget.hasAVX2() && "MGATHER/MSCATTER are supported on AVX-512/AVX-2 arch only" ) ? void (0) : __assert_fail ("Subtarget.hasAVX2() && \"MGATHER/MSCATTER are supported on AVX-512/AVX-2 arch only\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30860, __extension__ __PRETTY_FUNCTION__)); | |||
30861 | ||||
30862 | MaskedGatherSDNode *N = cast<MaskedGatherSDNode>(Op.getNode()); | |||
30863 | SDLoc dl(Op); | |||
30864 | MVT VT = Op.getSimpleValueType(); | |||
30865 | SDValue Index = N->getIndex(); | |||
30866 | SDValue Mask = N->getMask(); | |||
30867 | SDValue PassThru = N->getPassThru(); | |||
30868 | MVT IndexVT = Index.getSimpleValueType(); | |||
30869 | ||||
30870 | assert(VT.getScalarSizeInBits() >= 32 && "Unsupported gather op")(static_cast <bool> (VT.getScalarSizeInBits() >= 32 && "Unsupported gather op") ? void (0) : __assert_fail ("VT.getScalarSizeInBits() >= 32 && \"Unsupported gather op\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30870, __extension__ __PRETTY_FUNCTION__)); | |||
30871 | ||||
30872 | // If the index is v2i32, we're being called by type legalization. | |||
30873 | if (IndexVT == MVT::v2i32) | |||
30874 | return SDValue(); | |||
30875 | ||||
30876 | // If we don't have VLX and neither the passthru or index is 512-bits, we | |||
30877 | // need to widen until one is. | |||
30878 | MVT OrigVT = VT; | |||
30879 | if (Subtarget.hasAVX512() && !Subtarget.hasVLX() && !VT.is512BitVector() && | |||
30880 | !IndexVT.is512BitVector()) { | |||
30881 | // Determine how much we need to widen by to get a 512-bit type. | |||
30882 | unsigned Factor = std::min(512/VT.getSizeInBits(), | |||
30883 | 512/IndexVT.getSizeInBits()); | |||
30884 | ||||
30885 | unsigned NumElts = VT.getVectorNumElements() * Factor; | |||
30886 | ||||
30887 | VT = MVT::getVectorVT(VT.getVectorElementType(), NumElts); | |||
30888 | IndexVT = MVT::getVectorVT(IndexVT.getVectorElementType(), NumElts); | |||
30889 | MVT MaskVT = MVT::getVectorVT(MVT::i1, NumElts); | |||
30890 | ||||
30891 | PassThru = ExtendToType(PassThru, VT, DAG); | |||
30892 | Index = ExtendToType(Index, IndexVT, DAG); | |||
30893 | Mask = ExtendToType(Mask, MaskVT, DAG, true); | |||
30894 | } | |||
30895 | ||||
30896 | SDValue Ops[] = { N->getChain(), PassThru, Mask, N->getBasePtr(), Index, | |||
30897 | N->getScale() }; | |||
30898 | SDValue NewGather = DAG.getMemIntrinsicNode( | |||
30899 | X86ISD::MGATHER, dl, DAG.getVTList(VT, MVT::Other), Ops, N->getMemoryVT(), | |||
30900 | N->getMemOperand()); | |||
30901 | SDValue Extract = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, OrigVT, | |||
30902 | NewGather, DAG.getIntPtrConstant(0, dl)); | |||
30903 | return DAG.getMergeValues({Extract, NewGather.getValue(1)}, dl); | |||
30904 | } | |||
30905 | ||||
30906 | static SDValue LowerADDRSPACECAST(SDValue Op, SelectionDAG &DAG) { | |||
30907 | SDLoc dl(Op); | |||
30908 | SDValue Src = Op.getOperand(0); | |||
30909 | MVT DstVT = Op.getSimpleValueType(); | |||
30910 | ||||
30911 | AddrSpaceCastSDNode *N = cast<AddrSpaceCastSDNode>(Op.getNode()); | |||
30912 | unsigned SrcAS = N->getSrcAddressSpace(); | |||
30913 | ||||
30914 | assert(SrcAS != N->getDestAddressSpace() &&(static_cast <bool> (SrcAS != N->getDestAddressSpace () && "addrspacecast must be between different address spaces" ) ? void (0) : __assert_fail ("SrcAS != N->getDestAddressSpace() && \"addrspacecast must be between different address spaces\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30915, __extension__ __PRETTY_FUNCTION__)) | |||
30915 | "addrspacecast must be between different address spaces")(static_cast <bool> (SrcAS != N->getDestAddressSpace () && "addrspacecast must be between different address spaces" ) ? void (0) : __assert_fail ("SrcAS != N->getDestAddressSpace() && \"addrspacecast must be between different address spaces\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30915, __extension__ __PRETTY_FUNCTION__)); | |||
30916 | ||||
30917 | if (SrcAS == X86AS::PTR32_UPTR && DstVT == MVT::i64) { | |||
30918 | Op = DAG.getNode(ISD::ZERO_EXTEND, dl, DstVT, Src); | |||
30919 | } else if (DstVT == MVT::i64) { | |||
30920 | Op = DAG.getNode(ISD::SIGN_EXTEND, dl, DstVT, Src); | |||
30921 | } else if (DstVT == MVT::i32) { | |||
30922 | Op = DAG.getNode(ISD::TRUNCATE, dl, DstVT, Src); | |||
30923 | } else { | |||
30924 | report_fatal_error("Bad address space in addrspacecast"); | |||
30925 | } | |||
30926 | return Op; | |||
30927 | } | |||
30928 | ||||
30929 | SDValue X86TargetLowering::LowerGC_TRANSITION(SDValue Op, | |||
30930 | SelectionDAG &DAG) const { | |||
30931 | // TODO: Eventually, the lowering of these nodes should be informed by or | |||
30932 | // deferred to the GC strategy for the function in which they appear. For | |||
30933 | // now, however, they must be lowered to something. Since they are logically | |||
30934 | // no-ops in the case of a null GC strategy (or a GC strategy which does not | |||
30935 | // require special handling for these nodes), lower them as literal NOOPs for | |||
30936 | // the time being. | |||
30937 | SmallVector<SDValue, 2> Ops; | |||
30938 | ||||
30939 | Ops.push_back(Op.getOperand(0)); | |||
30940 | if (Op->getGluedNode()) | |||
30941 | Ops.push_back(Op->getOperand(Op->getNumOperands() - 1)); | |||
30942 | ||||
30943 | SDLoc OpDL(Op); | |||
30944 | SDVTList VTs = DAG.getVTList(MVT::Other, MVT::Glue); | |||
30945 | SDValue NOOP(DAG.getMachineNode(X86::NOOP, SDLoc(Op), VTs, Ops), 0); | |||
30946 | ||||
30947 | return NOOP; | |||
30948 | } | |||
30949 | ||||
30950 | // Custom split CVTPS2PH with wide types. | |||
30951 | static SDValue LowerCVTPS2PH(SDValue Op, SelectionDAG &DAG) { | |||
30952 | SDLoc dl(Op); | |||
30953 | EVT VT = Op.getValueType(); | |||
30954 | SDValue Lo, Hi; | |||
30955 | std::tie(Lo, Hi) = DAG.SplitVectorOperand(Op.getNode(), 0); | |||
30956 | EVT LoVT, HiVT; | |||
30957 | std::tie(LoVT, HiVT) = DAG.GetSplitDestVTs(VT); | |||
30958 | SDValue RC = Op.getOperand(1); | |||
30959 | Lo = DAG.getNode(X86ISD::CVTPS2PH, dl, LoVT, Lo, RC); | |||
30960 | Hi = DAG.getNode(X86ISD::CVTPS2PH, dl, HiVT, Hi, RC); | |||
30961 | return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, Lo, Hi); | |||
30962 | } | |||
30963 | ||||
30964 | /// Provide custom lowering hooks for some operations. | |||
30965 | SDValue X86TargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const { | |||
30966 | switch (Op.getOpcode()) { | |||
30967 | default: llvm_unreachable("Should not custom lower this!")::llvm::llvm_unreachable_internal("Should not custom lower this!" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 30967); | |||
30968 | case ISD::ATOMIC_FENCE: return LowerATOMIC_FENCE(Op, Subtarget, DAG); | |||
30969 | case ISD::ATOMIC_CMP_SWAP_WITH_SUCCESS: | |||
30970 | return LowerCMP_SWAP(Op, Subtarget, DAG); | |||
30971 | case ISD::CTPOP: return LowerCTPOP(Op, Subtarget, DAG); | |||
30972 | case ISD::ATOMIC_LOAD_ADD: | |||
30973 | case ISD::ATOMIC_LOAD_SUB: | |||
30974 | case ISD::ATOMIC_LOAD_OR: | |||
30975 | case ISD::ATOMIC_LOAD_XOR: | |||
30976 | case ISD::ATOMIC_LOAD_AND: return lowerAtomicArith(Op, DAG, Subtarget); | |||
30977 | case ISD::ATOMIC_STORE: return LowerATOMIC_STORE(Op, DAG, Subtarget); | |||
30978 | case ISD::BITREVERSE: return LowerBITREVERSE(Op, Subtarget, DAG); | |||
30979 | case ISD::PARITY: return LowerPARITY(Op, Subtarget, DAG); | |||
30980 | case ISD::BUILD_VECTOR: return LowerBUILD_VECTOR(Op, DAG); | |||
30981 | case ISD::CONCAT_VECTORS: return LowerCONCAT_VECTORS(Op, Subtarget, DAG); | |||
30982 | case ISD::VECTOR_SHUFFLE: return lowerVECTOR_SHUFFLE(Op, Subtarget, DAG); | |||
30983 | case ISD::VSELECT: return LowerVSELECT(Op, DAG); | |||
30984 | case ISD::EXTRACT_VECTOR_ELT: return LowerEXTRACT_VECTOR_ELT(Op, DAG); | |||
30985 | case ISD::INSERT_VECTOR_ELT: return LowerINSERT_VECTOR_ELT(Op, DAG); | |||
30986 | case ISD::INSERT_SUBVECTOR: return LowerINSERT_SUBVECTOR(Op, Subtarget,DAG); | |||
30987 | case ISD::EXTRACT_SUBVECTOR: return LowerEXTRACT_SUBVECTOR(Op,Subtarget,DAG); | |||
30988 | case ISD::SCALAR_TO_VECTOR: return LowerSCALAR_TO_VECTOR(Op, Subtarget,DAG); | |||
30989 | case ISD::ConstantPool: return LowerConstantPool(Op, DAG); | |||
30990 | case ISD::GlobalAddress: return LowerGlobalAddress(Op, DAG); | |||
30991 | case ISD::GlobalTLSAddress: return LowerGlobalTLSAddress(Op, DAG); | |||
30992 | case ISD::ExternalSymbol: return LowerExternalSymbol(Op, DAG); | |||
30993 | case ISD::BlockAddress: return LowerBlockAddress(Op, DAG); | |||
30994 | case ISD::SHL_PARTS: | |||
30995 | case ISD::SRA_PARTS: | |||
30996 | case ISD::SRL_PARTS: return LowerShiftParts(Op, DAG); | |||
30997 | case ISD::FSHL: | |||
30998 | case ISD::FSHR: return LowerFunnelShift(Op, Subtarget, DAG); | |||
30999 | case ISD::STRICT_SINT_TO_FP: | |||
31000 | case ISD::SINT_TO_FP: return LowerSINT_TO_FP(Op, DAG); | |||
31001 | case ISD::STRICT_UINT_TO_FP: | |||
31002 | case ISD::UINT_TO_FP: return LowerUINT_TO_FP(Op, DAG); | |||
31003 | case ISD::TRUNCATE: return LowerTRUNCATE(Op, DAG); | |||
31004 | case ISD::ZERO_EXTEND: return LowerZERO_EXTEND(Op, Subtarget, DAG); | |||
31005 | case ISD::SIGN_EXTEND: return LowerSIGN_EXTEND(Op, Subtarget, DAG); | |||
31006 | case ISD::ANY_EXTEND: return LowerANY_EXTEND(Op, Subtarget, DAG); | |||
31007 | case ISD::ZERO_EXTEND_VECTOR_INREG: | |||
31008 | case ISD::SIGN_EXTEND_VECTOR_INREG: | |||
31009 | return LowerEXTEND_VECTOR_INREG(Op, Subtarget, DAG); | |||
31010 | case ISD::FP_TO_SINT: | |||
31011 | case ISD::STRICT_FP_TO_SINT: | |||
31012 | case ISD::FP_TO_UINT: | |||
31013 | case ISD::STRICT_FP_TO_UINT: return LowerFP_TO_INT(Op, DAG); | |||
31014 | case ISD::FP_TO_SINT_SAT: | |||
31015 | case ISD::FP_TO_UINT_SAT: return LowerFP_TO_INT_SAT(Op, DAG); | |||
31016 | case ISD::FP_EXTEND: | |||
31017 | case ISD::STRICT_FP_EXTEND: return LowerFP_EXTEND(Op, DAG); | |||
31018 | case ISD::FP_ROUND: | |||
31019 | case ISD::STRICT_FP_ROUND: return LowerFP_ROUND(Op, DAG); | |||
31020 | case ISD::FP16_TO_FP: | |||
31021 | case ISD::STRICT_FP16_TO_FP: return LowerFP16_TO_FP(Op, DAG); | |||
31022 | case ISD::FP_TO_FP16: | |||
31023 | case ISD::STRICT_FP_TO_FP16: return LowerFP_TO_FP16(Op, DAG); | |||
31024 | case ISD::LOAD: return LowerLoad(Op, Subtarget, DAG); | |||
31025 | case ISD::STORE: return LowerStore(Op, Subtarget, DAG); | |||
31026 | case ISD::FADD: | |||
31027 | case ISD::FSUB: return lowerFaddFsub(Op, DAG); | |||
31028 | case ISD::FROUND: return LowerFROUND(Op, DAG); | |||
31029 | case ISD::FABS: | |||
31030 | case ISD::FNEG: return LowerFABSorFNEG(Op, DAG); | |||
31031 | case ISD::FCOPYSIGN: return LowerFCOPYSIGN(Op, DAG); | |||
31032 | case ISD::FGETSIGN: return LowerFGETSIGN(Op, DAG); | |||
31033 | case ISD::ISNAN: return lowerISNAN(Op, DAG); | |||
31034 | case ISD::LRINT: | |||
31035 | case ISD::LLRINT: return LowerLRINT_LLRINT(Op, DAG); | |||
31036 | case ISD::SETCC: | |||
31037 | case ISD::STRICT_FSETCC: | |||
31038 | case ISD::STRICT_FSETCCS: return LowerSETCC(Op, DAG); | |||
31039 | case ISD::SETCCCARRY: return LowerSETCCCARRY(Op, DAG); | |||
31040 | case ISD::SELECT: return LowerSELECT(Op, DAG); | |||
31041 | case ISD::BRCOND: return LowerBRCOND(Op, DAG); | |||
31042 | case ISD::JumpTable: return LowerJumpTable(Op, DAG); | |||
31043 | case ISD::VASTART: return LowerVASTART(Op, DAG); | |||
31044 | case ISD::VAARG: return LowerVAARG(Op, DAG); | |||
31045 | case ISD::VACOPY: return LowerVACOPY(Op, Subtarget, DAG); | |||
31046 | case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG); | |||
31047 | case ISD::INTRINSIC_VOID: | |||
31048 | case ISD::INTRINSIC_W_CHAIN: return LowerINTRINSIC_W_CHAIN(Op, Subtarget, DAG); | |||
31049 | case ISD::RETURNADDR: return LowerRETURNADDR(Op, DAG); | |||
31050 | case ISD::ADDROFRETURNADDR: return LowerADDROFRETURNADDR(Op, DAG); | |||
31051 | case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG); | |||
31052 | case ISD::FRAME_TO_ARGS_OFFSET: | |||
31053 | return LowerFRAME_TO_ARGS_OFFSET(Op, DAG); | |||
31054 | case ISD::DYNAMIC_STACKALLOC: return LowerDYNAMIC_STACKALLOC(Op, DAG); | |||
31055 | case ISD::EH_RETURN: return LowerEH_RETURN(Op, DAG); | |||
31056 | case ISD::EH_SJLJ_SETJMP: return lowerEH_SJLJ_SETJMP(Op, DAG); | |||
31057 | case ISD::EH_SJLJ_LONGJMP: return lowerEH_SJLJ_LONGJMP(Op, DAG); | |||
31058 | case ISD::EH_SJLJ_SETUP_DISPATCH: | |||
31059 | return lowerEH_SJLJ_SETUP_DISPATCH(Op, DAG); | |||
31060 | case ISD::INIT_TRAMPOLINE: return LowerINIT_TRAMPOLINE(Op, DAG); | |||
31061 | case ISD::ADJUST_TRAMPOLINE: return LowerADJUST_TRAMPOLINE(Op, DAG); | |||
31062 | case ISD::FLT_ROUNDS_: return LowerFLT_ROUNDS_(Op, DAG); | |||
31063 | case ISD::SET_ROUNDING: return LowerSET_ROUNDING(Op, DAG); | |||
31064 | case ISD::CTLZ: | |||
31065 | case ISD::CTLZ_ZERO_UNDEF: return LowerCTLZ(Op, Subtarget, DAG); | |||
31066 | case ISD::CTTZ: | |||
31067 | case ISD::CTTZ_ZERO_UNDEF: return LowerCTTZ(Op, Subtarget, DAG); | |||
31068 | case ISD::MUL: return LowerMUL(Op, Subtarget, DAG); | |||
31069 | case ISD::MULHS: | |||
31070 | case ISD::MULHU: return LowerMULH(Op, Subtarget, DAG); | |||
31071 | case ISD::ROTL: | |||
31072 | case ISD::ROTR: return LowerRotate(Op, Subtarget, DAG); | |||
31073 | case ISD::SRA: | |||
31074 | case ISD::SRL: | |||
31075 | case ISD::SHL: return LowerShift(Op, Subtarget, DAG); | |||
31076 | case ISD::SADDO: | |||
31077 | case ISD::UADDO: | |||
31078 | case ISD::SSUBO: | |||
31079 | case ISD::USUBO: return LowerXALUO(Op, DAG); | |||
31080 | case ISD::SMULO: | |||
31081 | case ISD::UMULO: return LowerMULO(Op, Subtarget, DAG); | |||
31082 | case ISD::READCYCLECOUNTER: return LowerREADCYCLECOUNTER(Op, Subtarget,DAG); | |||
31083 | case ISD::BITCAST: return LowerBITCAST(Op, Subtarget, DAG); | |||
31084 | case ISD::SADDO_CARRY: | |||
31085 | case ISD::SSUBO_CARRY: | |||
31086 | case ISD::ADDCARRY: | |||
31087 | case ISD::SUBCARRY: return LowerADDSUBCARRY(Op, DAG); | |||
31088 | case ISD::ADD: | |||
31089 | case ISD::SUB: return lowerAddSub(Op, DAG, Subtarget); | |||
31090 | case ISD::UADDSAT: | |||
31091 | case ISD::SADDSAT: | |||
31092 | case ISD::USUBSAT: | |||
31093 | case ISD::SSUBSAT: return LowerADDSAT_SUBSAT(Op, DAG, Subtarget); | |||
31094 | case ISD::SMAX: | |||
31095 | case ISD::SMIN: | |||
31096 | case ISD::UMAX: | |||
31097 | case ISD::UMIN: return LowerMINMAX(Op, DAG); | |||
31098 | case ISD::ABS: return LowerABS(Op, Subtarget, DAG); | |||
31099 | case ISD::FSINCOS: return LowerFSINCOS(Op, Subtarget, DAG); | |||
31100 | case ISD::MLOAD: return LowerMLOAD(Op, Subtarget, DAG); | |||
31101 | case ISD::MSTORE: return LowerMSTORE(Op, Subtarget, DAG); | |||
31102 | case ISD::MGATHER: return LowerMGATHER(Op, Subtarget, DAG); | |||
31103 | case ISD::MSCATTER: return LowerMSCATTER(Op, Subtarget, DAG); | |||
31104 | case ISD::GC_TRANSITION_START: | |||
31105 | case ISD::GC_TRANSITION_END: return LowerGC_TRANSITION(Op, DAG); | |||
31106 | case ISD::ADDRSPACECAST: return LowerADDRSPACECAST(Op, DAG); | |||
31107 | case X86ISD::CVTPS2PH: return LowerCVTPS2PH(Op, DAG); | |||
31108 | } | |||
31109 | } | |||
31110 | ||||
31111 | /// Replace a node with an illegal result type with a new node built out of | |||
31112 | /// custom code. | |||
31113 | void X86TargetLowering::ReplaceNodeResults(SDNode *N, | |||
31114 | SmallVectorImpl<SDValue>&Results, | |||
31115 | SelectionDAG &DAG) const { | |||
31116 | SDLoc dl(N); | |||
31117 | switch (N->getOpcode()) { | |||
31118 | default: | |||
31119 | #ifndef NDEBUG | |||
31120 | dbgs() << "ReplaceNodeResults: "; | |||
31121 | N->dump(&DAG); | |||
31122 | #endif | |||
31123 | llvm_unreachable("Do not know how to custom type legalize this operation!")::llvm::llvm_unreachable_internal("Do not know how to custom type legalize this operation!" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31123); | |||
31124 | case X86ISD::CVTPH2PS: { | |||
31125 | EVT VT = N->getValueType(0); | |||
31126 | SDValue Lo, Hi; | |||
31127 | std::tie(Lo, Hi) = DAG.SplitVectorOperand(N, 0); | |||
31128 | EVT LoVT, HiVT; | |||
31129 | std::tie(LoVT, HiVT) = DAG.GetSplitDestVTs(VT); | |||
31130 | Lo = DAG.getNode(X86ISD::CVTPH2PS, dl, LoVT, Lo); | |||
31131 | Hi = DAG.getNode(X86ISD::CVTPH2PS, dl, HiVT, Hi); | |||
31132 | SDValue Res = DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, Lo, Hi); | |||
31133 | Results.push_back(Res); | |||
31134 | return; | |||
31135 | } | |||
31136 | case X86ISD::STRICT_CVTPH2PS: { | |||
31137 | EVT VT = N->getValueType(0); | |||
31138 | SDValue Lo, Hi; | |||
31139 | std::tie(Lo, Hi) = DAG.SplitVectorOperand(N, 1); | |||
31140 | EVT LoVT, HiVT; | |||
31141 | std::tie(LoVT, HiVT) = DAG.GetSplitDestVTs(VT); | |||
31142 | Lo = DAG.getNode(X86ISD::STRICT_CVTPH2PS, dl, {LoVT, MVT::Other}, | |||
31143 | {N->getOperand(0), Lo}); | |||
31144 | Hi = DAG.getNode(X86ISD::STRICT_CVTPH2PS, dl, {HiVT, MVT::Other}, | |||
31145 | {N->getOperand(0), Hi}); | |||
31146 | SDValue Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, | |||
31147 | Lo.getValue(1), Hi.getValue(1)); | |||
31148 | SDValue Res = DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, Lo, Hi); | |||
31149 | Results.push_back(Res); | |||
31150 | Results.push_back(Chain); | |||
31151 | return; | |||
31152 | } | |||
31153 | case X86ISD::CVTPS2PH: | |||
31154 | Results.push_back(LowerCVTPS2PH(SDValue(N, 0), DAG)); | |||
31155 | return; | |||
31156 | case ISD::CTPOP: { | |||
31157 | assert(N->getValueType(0) == MVT::i64 && "Unexpected VT!")(static_cast <bool> (N->getValueType(0) == MVT::i64 && "Unexpected VT!") ? void (0) : __assert_fail ("N->getValueType(0) == MVT::i64 && \"Unexpected VT!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31157, __extension__ __PRETTY_FUNCTION__)); | |||
31158 | // Use a v2i64 if possible. | |||
31159 | bool NoImplicitFloatOps = | |||
31160 | DAG.getMachineFunction().getFunction().hasFnAttribute( | |||
31161 | Attribute::NoImplicitFloat); | |||
31162 | if (isTypeLegal(MVT::v2i64) && !NoImplicitFloatOps) { | |||
31163 | SDValue Wide = | |||
31164 | DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2i64, N->getOperand(0)); | |||
31165 | Wide = DAG.getNode(ISD::CTPOP, dl, MVT::v2i64, Wide); | |||
31166 | // Bit count should fit in 32-bits, extract it as that and then zero | |||
31167 | // extend to i64. Otherwise we end up extracting bits 63:32 separately. | |||
31168 | Wide = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, Wide); | |||
31169 | Wide = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32, Wide, | |||
31170 | DAG.getIntPtrConstant(0, dl)); | |||
31171 | Wide = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i64, Wide); | |||
31172 | Results.push_back(Wide); | |||
31173 | } | |||
31174 | return; | |||
31175 | } | |||
31176 | case ISD::MUL: { | |||
31177 | EVT VT = N->getValueType(0); | |||
31178 | assert(getTypeAction(*DAG.getContext(), VT) == TypeWidenVector &&(static_cast <bool> (getTypeAction(*DAG.getContext(), VT ) == TypeWidenVector && VT.getVectorElementType() == MVT ::i8 && "Unexpected VT!") ? void (0) : __assert_fail ( "getTypeAction(*DAG.getContext(), VT) == TypeWidenVector && VT.getVectorElementType() == MVT::i8 && \"Unexpected VT!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31179, __extension__ __PRETTY_FUNCTION__)) | |||
31179 | VT.getVectorElementType() == MVT::i8 && "Unexpected VT!")(static_cast <bool> (getTypeAction(*DAG.getContext(), VT ) == TypeWidenVector && VT.getVectorElementType() == MVT ::i8 && "Unexpected VT!") ? void (0) : __assert_fail ( "getTypeAction(*DAG.getContext(), VT) == TypeWidenVector && VT.getVectorElementType() == MVT::i8 && \"Unexpected VT!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31179, __extension__ __PRETTY_FUNCTION__)); | |||
31180 | // Pre-promote these to vXi16 to avoid op legalization thinking all 16 | |||
31181 | // elements are needed. | |||
31182 | MVT MulVT = MVT::getVectorVT(MVT::i16, VT.getVectorNumElements()); | |||
31183 | SDValue Op0 = DAG.getNode(ISD::ANY_EXTEND, dl, MulVT, N->getOperand(0)); | |||
31184 | SDValue Op1 = DAG.getNode(ISD::ANY_EXTEND, dl, MulVT, N->getOperand(1)); | |||
31185 | SDValue Res = DAG.getNode(ISD::MUL, dl, MulVT, Op0, Op1); | |||
31186 | Res = DAG.getNode(ISD::TRUNCATE, dl, VT, Res); | |||
31187 | unsigned NumConcats = 16 / VT.getVectorNumElements(); | |||
31188 | SmallVector<SDValue, 8> ConcatOps(NumConcats, DAG.getUNDEF(VT)); | |||
31189 | ConcatOps[0] = Res; | |||
31190 | Res = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v16i8, ConcatOps); | |||
31191 | Results.push_back(Res); | |||
31192 | return; | |||
31193 | } | |||
31194 | case X86ISD::VPMADDWD: | |||
31195 | case X86ISD::AVG: { | |||
31196 | // Legalize types for X86ISD::AVG/VPMADDWD by widening. | |||
31197 | assert(Subtarget.hasSSE2() && "Requires at least SSE2!")(static_cast <bool> (Subtarget.hasSSE2() && "Requires at least SSE2!" ) ? void (0) : __assert_fail ("Subtarget.hasSSE2() && \"Requires at least SSE2!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31197, __extension__ __PRETTY_FUNCTION__)); | |||
31198 | ||||
31199 | EVT VT = N->getValueType(0); | |||
31200 | EVT InVT = N->getOperand(0).getValueType(); | |||
31201 | assert(VT.getSizeInBits() < 128 && 128 % VT.getSizeInBits() == 0 &&(static_cast <bool> (VT.getSizeInBits() < 128 && 128 % VT.getSizeInBits() == 0 && "Expected a VT that divides into 128 bits." ) ? void (0) : __assert_fail ("VT.getSizeInBits() < 128 && 128 % VT.getSizeInBits() == 0 && \"Expected a VT that divides into 128 bits.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31202, __extension__ __PRETTY_FUNCTION__)) | |||
31202 | "Expected a VT that divides into 128 bits.")(static_cast <bool> (VT.getSizeInBits() < 128 && 128 % VT.getSizeInBits() == 0 && "Expected a VT that divides into 128 bits." ) ? void (0) : __assert_fail ("VT.getSizeInBits() < 128 && 128 % VT.getSizeInBits() == 0 && \"Expected a VT that divides into 128 bits.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31202, __extension__ __PRETTY_FUNCTION__)); | |||
31203 | assert(getTypeAction(*DAG.getContext(), VT) == TypeWidenVector &&(static_cast <bool> (getTypeAction(*DAG.getContext(), VT ) == TypeWidenVector && "Unexpected type action!") ? void (0) : __assert_fail ("getTypeAction(*DAG.getContext(), VT) == TypeWidenVector && \"Unexpected type action!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31204, __extension__ __PRETTY_FUNCTION__)) | |||
31204 | "Unexpected type action!")(static_cast <bool> (getTypeAction(*DAG.getContext(), VT ) == TypeWidenVector && "Unexpected type action!") ? void (0) : __assert_fail ("getTypeAction(*DAG.getContext(), VT) == TypeWidenVector && \"Unexpected type action!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31204, __extension__ __PRETTY_FUNCTION__)); | |||
31205 | unsigned NumConcat = 128 / InVT.getSizeInBits(); | |||
31206 | ||||
31207 | EVT InWideVT = EVT::getVectorVT(*DAG.getContext(), | |||
31208 | InVT.getVectorElementType(), | |||
31209 | NumConcat * InVT.getVectorNumElements()); | |||
31210 | EVT WideVT = EVT::getVectorVT(*DAG.getContext(), | |||
31211 | VT.getVectorElementType(), | |||
31212 | NumConcat * VT.getVectorNumElements()); | |||
31213 | ||||
31214 | SmallVector<SDValue, 16> Ops(NumConcat, DAG.getUNDEF(InVT)); | |||
31215 | Ops[0] = N->getOperand(0); | |||
31216 | SDValue InVec0 = DAG.getNode(ISD::CONCAT_VECTORS, dl, InWideVT, Ops); | |||
31217 | Ops[0] = N->getOperand(1); | |||
31218 | SDValue InVec1 = DAG.getNode(ISD::CONCAT_VECTORS, dl, InWideVT, Ops); | |||
31219 | ||||
31220 | SDValue Res = DAG.getNode(N->getOpcode(), dl, WideVT, InVec0, InVec1); | |||
31221 | Results.push_back(Res); | |||
31222 | return; | |||
31223 | } | |||
31224 | // We might have generated v2f32 FMIN/FMAX operations. Widen them to v4f32. | |||
31225 | case X86ISD::FMINC: | |||
31226 | case X86ISD::FMIN: | |||
31227 | case X86ISD::FMAXC: | |||
31228 | case X86ISD::FMAX: { | |||
31229 | EVT VT = N->getValueType(0); | |||
31230 | assert(VT == MVT::v2f32 && "Unexpected type (!= v2f32) on FMIN/FMAX.")(static_cast <bool> (VT == MVT::v2f32 && "Unexpected type (!= v2f32) on FMIN/FMAX." ) ? void (0) : __assert_fail ("VT == MVT::v2f32 && \"Unexpected type (!= v2f32) on FMIN/FMAX.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31230, __extension__ __PRETTY_FUNCTION__)); | |||
31231 | SDValue UNDEF = DAG.getUNDEF(VT); | |||
31232 | SDValue LHS = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v4f32, | |||
31233 | N->getOperand(0), UNDEF); | |||
31234 | SDValue RHS = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v4f32, | |||
31235 | N->getOperand(1), UNDEF); | |||
31236 | Results.push_back(DAG.getNode(N->getOpcode(), dl, MVT::v4f32, LHS, RHS)); | |||
31237 | return; | |||
31238 | } | |||
31239 | case ISD::SDIV: | |||
31240 | case ISD::UDIV: | |||
31241 | case ISD::SREM: | |||
31242 | case ISD::UREM: { | |||
31243 | EVT VT = N->getValueType(0); | |||
31244 | if (VT.isVector()) { | |||
31245 | assert(getTypeAction(*DAG.getContext(), VT) == TypeWidenVector &&(static_cast <bool> (getTypeAction(*DAG.getContext(), VT ) == TypeWidenVector && "Unexpected type action!") ? void (0) : __assert_fail ("getTypeAction(*DAG.getContext(), VT) == TypeWidenVector && \"Unexpected type action!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31246, __extension__ __PRETTY_FUNCTION__)) | |||
31246 | "Unexpected type action!")(static_cast <bool> (getTypeAction(*DAG.getContext(), VT ) == TypeWidenVector && "Unexpected type action!") ? void (0) : __assert_fail ("getTypeAction(*DAG.getContext(), VT) == TypeWidenVector && \"Unexpected type action!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31246, __extension__ __PRETTY_FUNCTION__)); | |||
31247 | // If this RHS is a constant splat vector we can widen this and let | |||
31248 | // division/remainder by constant optimize it. | |||
31249 | // TODO: Can we do something for non-splat? | |||
31250 | APInt SplatVal; | |||
31251 | if (ISD::isConstantSplatVector(N->getOperand(1).getNode(), SplatVal)) { | |||
31252 | unsigned NumConcats = 128 / VT.getSizeInBits(); | |||
31253 | SmallVector<SDValue, 8> Ops0(NumConcats, DAG.getUNDEF(VT)); | |||
31254 | Ops0[0] = N->getOperand(0); | |||
31255 | EVT ResVT = getTypeToTransformTo(*DAG.getContext(), VT); | |||
31256 | SDValue N0 = DAG.getNode(ISD::CONCAT_VECTORS, dl, ResVT, Ops0); | |||
31257 | SDValue N1 = DAG.getConstant(SplatVal, dl, ResVT); | |||
31258 | SDValue Res = DAG.getNode(N->getOpcode(), dl, ResVT, N0, N1); | |||
31259 | Results.push_back(Res); | |||
31260 | } | |||
31261 | return; | |||
31262 | } | |||
31263 | ||||
31264 | SDValue V = LowerWin64_i128OP(SDValue(N,0), DAG); | |||
31265 | Results.push_back(V); | |||
31266 | return; | |||
31267 | } | |||
31268 | case ISD::TRUNCATE: { | |||
31269 | MVT VT = N->getSimpleValueType(0); | |||
31270 | if (getTypeAction(*DAG.getContext(), VT) != TypeWidenVector) | |||
31271 | return; | |||
31272 | ||||
31273 | // The generic legalizer will try to widen the input type to the same | |||
31274 | // number of elements as the widened result type. But this isn't always | |||
31275 | // the best thing so do some custom legalization to avoid some cases. | |||
31276 | MVT WidenVT = getTypeToTransformTo(*DAG.getContext(), VT).getSimpleVT(); | |||
31277 | SDValue In = N->getOperand(0); | |||
31278 | EVT InVT = In.getValueType(); | |||
31279 | ||||
31280 | unsigned InBits = InVT.getSizeInBits(); | |||
31281 | if (128 % InBits == 0) { | |||
31282 | // 128 bit and smaller inputs should avoid truncate all together and | |||
31283 | // just use a build_vector that will become a shuffle. | |||
31284 | // TODO: Widen and use a shuffle directly? | |||
31285 | MVT InEltVT = InVT.getSimpleVT().getVectorElementType(); | |||
31286 | EVT EltVT = VT.getVectorElementType(); | |||
31287 | unsigned WidenNumElts = WidenVT.getVectorNumElements(); | |||
31288 | SmallVector<SDValue, 16> Ops(WidenNumElts, DAG.getUNDEF(EltVT)); | |||
31289 | // Use the original element count so we don't do more scalar opts than | |||
31290 | // necessary. | |||
31291 | unsigned MinElts = VT.getVectorNumElements(); | |||
31292 | for (unsigned i=0; i < MinElts; ++i) { | |||
31293 | SDValue Val = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, InEltVT, In, | |||
31294 | DAG.getIntPtrConstant(i, dl)); | |||
31295 | Ops[i] = DAG.getNode(ISD::TRUNCATE, dl, EltVT, Val); | |||
31296 | } | |||
31297 | Results.push_back(DAG.getBuildVector(WidenVT, dl, Ops)); | |||
31298 | return; | |||
31299 | } | |||
31300 | // With AVX512 there are some cases that can use a target specific | |||
31301 | // truncate node to go from 256/512 to less than 128 with zeros in the | |||
31302 | // upper elements of the 128 bit result. | |||
31303 | if (Subtarget.hasAVX512() && isTypeLegal(InVT)) { | |||
31304 | // We can use VTRUNC directly if for 256 bits with VLX or for any 512. | |||
31305 | if ((InBits == 256 && Subtarget.hasVLX()) || InBits == 512) { | |||
31306 | Results.push_back(DAG.getNode(X86ISD::VTRUNC, dl, WidenVT, In)); | |||
31307 | return; | |||
31308 | } | |||
31309 | // There's one case we can widen to 512 bits and use VTRUNC. | |||
31310 | if (InVT == MVT::v4i64 && VT == MVT::v4i8 && isTypeLegal(MVT::v8i64)) { | |||
31311 | In = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v8i64, In, | |||
31312 | DAG.getUNDEF(MVT::v4i64)); | |||
31313 | Results.push_back(DAG.getNode(X86ISD::VTRUNC, dl, WidenVT, In)); | |||
31314 | return; | |||
31315 | } | |||
31316 | } | |||
31317 | if (Subtarget.hasVLX() && InVT == MVT::v8i64 && VT == MVT::v8i8 && | |||
31318 | getTypeAction(*DAG.getContext(), InVT) == TypeSplitVector && | |||
31319 | isTypeLegal(MVT::v4i64)) { | |||
31320 | // Input needs to be split and output needs to widened. Let's use two | |||
31321 | // VTRUNCs, and shuffle their results together into the wider type. | |||
31322 | SDValue Lo, Hi; | |||
31323 | std::tie(Lo, Hi) = DAG.SplitVector(In, dl); | |||
31324 | ||||
31325 | Lo = DAG.getNode(X86ISD::VTRUNC, dl, MVT::v16i8, Lo); | |||
31326 | Hi = DAG.getNode(X86ISD::VTRUNC, dl, MVT::v16i8, Hi); | |||
31327 | SDValue Res = DAG.getVectorShuffle(MVT::v16i8, dl, Lo, Hi, | |||
31328 | { 0, 1, 2, 3, 16, 17, 18, 19, | |||
31329 | -1, -1, -1, -1, -1, -1, -1, -1 }); | |||
31330 | Results.push_back(Res); | |||
31331 | return; | |||
31332 | } | |||
31333 | ||||
31334 | return; | |||
31335 | } | |||
31336 | case ISD::ANY_EXTEND: | |||
31337 | // Right now, only MVT::v8i8 has Custom action for an illegal type. | |||
31338 | // It's intended to custom handle the input type. | |||
31339 | assert(N->getValueType(0) == MVT::v8i8 &&(static_cast <bool> (N->getValueType(0) == MVT::v8i8 && "Do not know how to legalize this Node") ? void ( 0) : __assert_fail ("N->getValueType(0) == MVT::v8i8 && \"Do not know how to legalize this Node\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31340, __extension__ __PRETTY_FUNCTION__)) | |||
31340 | "Do not know how to legalize this Node")(static_cast <bool> (N->getValueType(0) == MVT::v8i8 && "Do not know how to legalize this Node") ? void ( 0) : __assert_fail ("N->getValueType(0) == MVT::v8i8 && \"Do not know how to legalize this Node\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31340, __extension__ __PRETTY_FUNCTION__)); | |||
31341 | return; | |||
31342 | case ISD::SIGN_EXTEND: | |||
31343 | case ISD::ZERO_EXTEND: { | |||
31344 | EVT VT = N->getValueType(0); | |||
31345 | SDValue In = N->getOperand(0); | |||
31346 | EVT InVT = In.getValueType(); | |||
31347 | if (!Subtarget.hasSSE41() && VT == MVT::v4i64 && | |||
31348 | (InVT == MVT::v4i16 || InVT == MVT::v4i8)){ | |||
31349 | assert(getTypeAction(*DAG.getContext(), InVT) == TypeWidenVector &&(static_cast <bool> (getTypeAction(*DAG.getContext(), InVT ) == TypeWidenVector && "Unexpected type action!") ? void (0) : __assert_fail ("getTypeAction(*DAG.getContext(), InVT) == TypeWidenVector && \"Unexpected type action!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31350, __extension__ __PRETTY_FUNCTION__)) | |||
31350 | "Unexpected type action!")(static_cast <bool> (getTypeAction(*DAG.getContext(), InVT ) == TypeWidenVector && "Unexpected type action!") ? void (0) : __assert_fail ("getTypeAction(*DAG.getContext(), InVT) == TypeWidenVector && \"Unexpected type action!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31350, __extension__ __PRETTY_FUNCTION__)); | |||
31351 | assert(N->getOpcode() == ISD::SIGN_EXTEND && "Unexpected opcode")(static_cast <bool> (N->getOpcode() == ISD::SIGN_EXTEND && "Unexpected opcode") ? void (0) : __assert_fail ( "N->getOpcode() == ISD::SIGN_EXTEND && \"Unexpected opcode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31351, __extension__ __PRETTY_FUNCTION__)); | |||
31352 | // Custom split this so we can extend i8/i16->i32 invec. This is better | |||
31353 | // since sign_extend_inreg i8/i16->i64 requires an extend to i32 using | |||
31354 | // sra. Then extending from i32 to i64 using pcmpgt. By custom splitting | |||
31355 | // we allow the sra from the extend to i32 to be shared by the split. | |||
31356 | In = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v4i32, In); | |||
31357 | ||||
31358 | // Fill a vector with sign bits for each element. | |||
31359 | SDValue Zero = DAG.getConstant(0, dl, MVT::v4i32); | |||
31360 | SDValue SignBits = DAG.getSetCC(dl, MVT::v4i32, Zero, In, ISD::SETGT); | |||
31361 | ||||
31362 | // Create an unpackl and unpackh to interleave the sign bits then bitcast | |||
31363 | // to v2i64. | |||
31364 | SDValue Lo = DAG.getVectorShuffle(MVT::v4i32, dl, In, SignBits, | |||
31365 | {0, 4, 1, 5}); | |||
31366 | Lo = DAG.getNode(ISD::BITCAST, dl, MVT::v2i64, Lo); | |||
31367 | SDValue Hi = DAG.getVectorShuffle(MVT::v4i32, dl, In, SignBits, | |||
31368 | {2, 6, 3, 7}); | |||
31369 | Hi = DAG.getNode(ISD::BITCAST, dl, MVT::v2i64, Hi); | |||
31370 | ||||
31371 | SDValue Res = DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, Lo, Hi); | |||
31372 | Results.push_back(Res); | |||
31373 | return; | |||
31374 | } | |||
31375 | ||||
31376 | if (VT == MVT::v16i32 || VT == MVT::v8i64) { | |||
31377 | if (!InVT.is128BitVector()) { | |||
31378 | // Not a 128 bit vector, but maybe type legalization will promote | |||
31379 | // it to 128 bits. | |||
31380 | if (getTypeAction(*DAG.getContext(), InVT) != TypePromoteInteger) | |||
31381 | return; | |||
31382 | InVT = getTypeToTransformTo(*DAG.getContext(), InVT); | |||
31383 | if (!InVT.is128BitVector()) | |||
31384 | return; | |||
31385 | ||||
31386 | // Promote the input to 128 bits. Type legalization will turn this into | |||
31387 | // zext_inreg/sext_inreg. | |||
31388 | In = DAG.getNode(N->getOpcode(), dl, InVT, In); | |||
31389 | } | |||
31390 | ||||
31391 | // Perform custom splitting instead of the two stage extend we would get | |||
31392 | // by default. | |||
31393 | EVT LoVT, HiVT; | |||
31394 | std::tie(LoVT, HiVT) = DAG.GetSplitDestVTs(N->getValueType(0)); | |||
31395 | assert(isTypeLegal(LoVT) && "Split VT not legal?")(static_cast <bool> (isTypeLegal(LoVT) && "Split VT not legal?" ) ? void (0) : __assert_fail ("isTypeLegal(LoVT) && \"Split VT not legal?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31395, __extension__ __PRETTY_FUNCTION__)); | |||
31396 | ||||
31397 | SDValue Lo = getEXTEND_VECTOR_INREG(N->getOpcode(), dl, LoVT, In, DAG); | |||
31398 | ||||
31399 | // We need to shift the input over by half the number of elements. | |||
31400 | unsigned NumElts = InVT.getVectorNumElements(); | |||
31401 | unsigned HalfNumElts = NumElts / 2; | |||
31402 | SmallVector<int, 16> ShufMask(NumElts, SM_SentinelUndef); | |||
31403 | for (unsigned i = 0; i != HalfNumElts; ++i) | |||
31404 | ShufMask[i] = i + HalfNumElts; | |||
31405 | ||||
31406 | SDValue Hi = DAG.getVectorShuffle(InVT, dl, In, In, ShufMask); | |||
31407 | Hi = getEXTEND_VECTOR_INREG(N->getOpcode(), dl, HiVT, Hi, DAG); | |||
31408 | ||||
31409 | SDValue Res = DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, Lo, Hi); | |||
31410 | Results.push_back(Res); | |||
31411 | } | |||
31412 | return; | |||
31413 | } | |||
31414 | case ISD::FP_TO_SINT: | |||
31415 | case ISD::STRICT_FP_TO_SINT: | |||
31416 | case ISD::FP_TO_UINT: | |||
31417 | case ISD::STRICT_FP_TO_UINT: { | |||
31418 | bool IsStrict = N->isStrictFPOpcode(); | |||
31419 | bool IsSigned = N->getOpcode() == ISD::FP_TO_SINT || | |||
31420 | N->getOpcode() == ISD::STRICT_FP_TO_SINT; | |||
31421 | EVT VT = N->getValueType(0); | |||
31422 | SDValue Src = N->getOperand(IsStrict ? 1 : 0); | |||
31423 | EVT SrcVT = Src.getValueType(); | |||
31424 | ||||
31425 | if (VT.isVector() && Subtarget.hasFP16() && | |||
31426 | SrcVT.getVectorElementType() == MVT::f16) { | |||
31427 | EVT EleVT = VT.getVectorElementType(); | |||
31428 | EVT ResVT = EleVT == MVT::i32 ? MVT::v4i32 : MVT::v8i16; | |||
31429 | ||||
31430 | if (SrcVT != MVT::v8f16) { | |||
31431 | SDValue Tmp = | |||
31432 | IsStrict ? DAG.getConstantFP(0.0, dl, SrcVT) : DAG.getUNDEF(SrcVT); | |||
31433 | SmallVector<SDValue, 4> Ops(SrcVT == MVT::v2f16 ? 4 : 2, Tmp); | |||
31434 | Ops[0] = Src; | |||
31435 | Src = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v8f16, Ops); | |||
31436 | } | |||
31437 | ||||
31438 | SDValue Res, Chain; | |||
31439 | if (IsStrict) { | |||
31440 | unsigned Opc = | |||
31441 | IsSigned ? X86ISD::STRICT_CVTTP2SI : X86ISD::STRICT_CVTTP2UI; | |||
31442 | Res = | |||
31443 | DAG.getNode(Opc, dl, {ResVT, MVT::Other}, {N->getOperand(0), Src}); | |||
31444 | Chain = Res.getValue(1); | |||
31445 | } else { | |||
31446 | unsigned Opc = IsSigned ? X86ISD::CVTTP2SI : X86ISD::CVTTP2UI; | |||
31447 | Res = DAG.getNode(Opc, dl, ResVT, Src); | |||
31448 | } | |||
31449 | ||||
31450 | // TODO: Need to add exception check code for strict FP. | |||
31451 | if (EleVT.getSizeInBits() < 16) { | |||
31452 | MVT TmpVT = MVT::getVectorVT(EleVT.getSimpleVT(), 8); | |||
31453 | Res = DAG.getNode(ISD::TRUNCATE, dl, TmpVT, Res); | |||
31454 | ||||
31455 | // Now widen to 128 bits. | |||
31456 | unsigned NumConcats = 128 / TmpVT.getSizeInBits(); | |||
31457 | MVT ConcatVT = MVT::getVectorVT(EleVT.getSimpleVT(), 8 * NumConcats); | |||
31458 | SmallVector<SDValue, 8> ConcatOps(NumConcats, DAG.getUNDEF(TmpVT)); | |||
31459 | ConcatOps[0] = Res; | |||
31460 | Res = DAG.getNode(ISD::CONCAT_VECTORS, dl, ConcatVT, ConcatOps); | |||
31461 | } | |||
31462 | ||||
31463 | Results.push_back(Res); | |||
31464 | if (IsStrict) | |||
31465 | Results.push_back(Chain); | |||
31466 | ||||
31467 | return; | |||
31468 | } | |||
31469 | ||||
31470 | if (VT.isVector() && VT.getScalarSizeInBits() < 32) { | |||
31471 | assert(getTypeAction(*DAG.getContext(), VT) == TypeWidenVector &&(static_cast <bool> (getTypeAction(*DAG.getContext(), VT ) == TypeWidenVector && "Unexpected type action!") ? void (0) : __assert_fail ("getTypeAction(*DAG.getContext(), VT) == TypeWidenVector && \"Unexpected type action!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31472, __extension__ __PRETTY_FUNCTION__)) | |||
31472 | "Unexpected type action!")(static_cast <bool> (getTypeAction(*DAG.getContext(), VT ) == TypeWidenVector && "Unexpected type action!") ? void (0) : __assert_fail ("getTypeAction(*DAG.getContext(), VT) == TypeWidenVector && \"Unexpected type action!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31472, __extension__ __PRETTY_FUNCTION__)); | |||
31473 | ||||
31474 | // Try to create a 128 bit vector, but don't exceed a 32 bit element. | |||
31475 | unsigned NewEltWidth = std::min(128 / VT.getVectorNumElements(), 32U); | |||
31476 | MVT PromoteVT = MVT::getVectorVT(MVT::getIntegerVT(NewEltWidth), | |||
31477 | VT.getVectorNumElements()); | |||
31478 | SDValue Res; | |||
31479 | SDValue Chain; | |||
31480 | if (IsStrict) { | |||
31481 | Res = DAG.getNode(ISD::STRICT_FP_TO_SINT, dl, {PromoteVT, MVT::Other}, | |||
31482 | {N->getOperand(0), Src}); | |||
31483 | Chain = Res.getValue(1); | |||
31484 | } else | |||
31485 | Res = DAG.getNode(ISD::FP_TO_SINT, dl, PromoteVT, Src); | |||
31486 | ||||
31487 | // Preserve what we know about the size of the original result. If the | |||
31488 | // result is v2i32, we have to manually widen the assert. | |||
31489 | if (PromoteVT == MVT::v2i32) | |||
31490 | Res = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v4i32, Res, | |||
31491 | DAG.getUNDEF(MVT::v2i32)); | |||
31492 | ||||
31493 | Res = DAG.getNode(!IsSigned ? ISD::AssertZext : ISD::AssertSext, dl, | |||
31494 | Res.getValueType(), Res, | |||
31495 | DAG.getValueType(VT.getVectorElementType())); | |||
31496 | ||||
31497 | if (PromoteVT == MVT::v2i32) | |||
31498 | Res = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v2i32, Res, | |||
31499 | DAG.getIntPtrConstant(0, dl)); | |||
31500 | ||||
31501 | // Truncate back to the original width. | |||
31502 | Res = DAG.getNode(ISD::TRUNCATE, dl, VT, Res); | |||
31503 | ||||
31504 | // Now widen to 128 bits. | |||
31505 | unsigned NumConcats = 128 / VT.getSizeInBits(); | |||
31506 | MVT ConcatVT = MVT::getVectorVT(VT.getSimpleVT().getVectorElementType(), | |||
31507 | VT.getVectorNumElements() * NumConcats); | |||
31508 | SmallVector<SDValue, 8> ConcatOps(NumConcats, DAG.getUNDEF(VT)); | |||
31509 | ConcatOps[0] = Res; | |||
31510 | Res = DAG.getNode(ISD::CONCAT_VECTORS, dl, ConcatVT, ConcatOps); | |||
31511 | Results.push_back(Res); | |||
31512 | if (IsStrict) | |||
31513 | Results.push_back(Chain); | |||
31514 | return; | |||
31515 | } | |||
31516 | ||||
31517 | ||||
31518 | if (VT == MVT::v2i32) { | |||
31519 | assert((!IsStrict || IsSigned || Subtarget.hasAVX512()) &&(static_cast <bool> ((!IsStrict || IsSigned || Subtarget .hasAVX512()) && "Strict unsigned conversion requires AVX512" ) ? void (0) : __assert_fail ("(!IsStrict || IsSigned || Subtarget.hasAVX512()) && \"Strict unsigned conversion requires AVX512\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31520, __extension__ __PRETTY_FUNCTION__)) | |||
31520 | "Strict unsigned conversion requires AVX512")(static_cast <bool> ((!IsStrict || IsSigned || Subtarget .hasAVX512()) && "Strict unsigned conversion requires AVX512" ) ? void (0) : __assert_fail ("(!IsStrict || IsSigned || Subtarget.hasAVX512()) && \"Strict unsigned conversion requires AVX512\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31520, __extension__ __PRETTY_FUNCTION__)); | |||
31521 | assert(Subtarget.hasSSE2() && "Requires at least SSE2!")(static_cast <bool> (Subtarget.hasSSE2() && "Requires at least SSE2!" ) ? void (0) : __assert_fail ("Subtarget.hasSSE2() && \"Requires at least SSE2!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31521, __extension__ __PRETTY_FUNCTION__)); | |||
31522 | assert(getTypeAction(*DAG.getContext(), VT) == TypeWidenVector &&(static_cast <bool> (getTypeAction(*DAG.getContext(), VT ) == TypeWidenVector && "Unexpected type action!") ? void (0) : __assert_fail ("getTypeAction(*DAG.getContext(), VT) == TypeWidenVector && \"Unexpected type action!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31523, __extension__ __PRETTY_FUNCTION__)) | |||
31523 | "Unexpected type action!")(static_cast <bool> (getTypeAction(*DAG.getContext(), VT ) == TypeWidenVector && "Unexpected type action!") ? void (0) : __assert_fail ("getTypeAction(*DAG.getContext(), VT) == TypeWidenVector && \"Unexpected type action!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31523, __extension__ __PRETTY_FUNCTION__)); | |||
31524 | if (Src.getValueType() == MVT::v2f64) { | |||
31525 | if (!IsSigned && !Subtarget.hasAVX512()) { | |||
31526 | SDValue Res = | |||
31527 | expandFP_TO_UINT_SSE(MVT::v4i32, Src, dl, DAG, Subtarget); | |||
31528 | Results.push_back(Res); | |||
31529 | return; | |||
31530 | } | |||
31531 | ||||
31532 | unsigned Opc; | |||
31533 | if (IsStrict) | |||
31534 | Opc = IsSigned ? X86ISD::STRICT_CVTTP2SI : X86ISD::STRICT_CVTTP2UI; | |||
31535 | else | |||
31536 | Opc = IsSigned ? X86ISD::CVTTP2SI : X86ISD::CVTTP2UI; | |||
31537 | ||||
31538 | // If we have VLX we can emit a target specific FP_TO_UINT node,. | |||
31539 | if (!IsSigned && !Subtarget.hasVLX()) { | |||
31540 | // Otherwise we can defer to the generic legalizer which will widen | |||
31541 | // the input as well. This will be further widened during op | |||
31542 | // legalization to v8i32<-v8f64. | |||
31543 | // For strict nodes we'll need to widen ourselves. | |||
31544 | // FIXME: Fix the type legalizer to safely widen strict nodes? | |||
31545 | if (!IsStrict) | |||
31546 | return; | |||
31547 | Src = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v4f64, Src, | |||
31548 | DAG.getConstantFP(0.0, dl, MVT::v2f64)); | |||
31549 | Opc = N->getOpcode(); | |||
31550 | } | |||
31551 | SDValue Res; | |||
31552 | SDValue Chain; | |||
31553 | if (IsStrict) { | |||
31554 | Res = DAG.getNode(Opc, dl, {MVT::v4i32, MVT::Other}, | |||
31555 | {N->getOperand(0), Src}); | |||
31556 | Chain = Res.getValue(1); | |||
31557 | } else { | |||
31558 | Res = DAG.getNode(Opc, dl, MVT::v4i32, Src); | |||
31559 | } | |||
31560 | Results.push_back(Res); | |||
31561 | if (IsStrict) | |||
31562 | Results.push_back(Chain); | |||
31563 | return; | |||
31564 | } | |||
31565 | ||||
31566 | // Custom widen strict v2f32->v2i32 by padding with zeros. | |||
31567 | // FIXME: Should generic type legalizer do this? | |||
31568 | if (Src.getValueType() == MVT::v2f32 && IsStrict) { | |||
31569 | Src = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v4f32, Src, | |||
31570 | DAG.getConstantFP(0.0, dl, MVT::v2f32)); | |||
31571 | SDValue Res = DAG.getNode(N->getOpcode(), dl, {MVT::v4i32, MVT::Other}, | |||
31572 | {N->getOperand(0), Src}); | |||
31573 | Results.push_back(Res); | |||
31574 | Results.push_back(Res.getValue(1)); | |||
31575 | return; | |||
31576 | } | |||
31577 | ||||
31578 | // The FP_TO_INTHelper below only handles f32/f64/f80 scalar inputs, | |||
31579 | // so early out here. | |||
31580 | return; | |||
31581 | } | |||
31582 | ||||
31583 | assert(!VT.isVector() && "Vectors should have been handled above!")(static_cast <bool> (!VT.isVector() && "Vectors should have been handled above!" ) ? void (0) : __assert_fail ("!VT.isVector() && \"Vectors should have been handled above!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31583, __extension__ __PRETTY_FUNCTION__)); | |||
31584 | ||||
31585 | if ((Subtarget.hasDQI() && VT == MVT::i64 && | |||
31586 | (SrcVT == MVT::f32 || SrcVT == MVT::f64)) || | |||
31587 | (Subtarget.hasFP16() && SrcVT == MVT::f16)) { | |||
31588 | assert(!Subtarget.is64Bit() && "i64 should be legal")(static_cast <bool> (!Subtarget.is64Bit() && "i64 should be legal" ) ? void (0) : __assert_fail ("!Subtarget.is64Bit() && \"i64 should be legal\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31588, __extension__ __PRETTY_FUNCTION__)); | |||
31589 | unsigned NumElts = Subtarget.hasVLX() ? 2 : 8; | |||
31590 | // If we use a 128-bit result we might need to use a target specific node. | |||
31591 | unsigned SrcElts = | |||
31592 | std::max(NumElts, 128U / (unsigned)SrcVT.getSizeInBits()); | |||
31593 | MVT VecVT = MVT::getVectorVT(MVT::i64, NumElts); | |||
31594 | MVT VecInVT = MVT::getVectorVT(SrcVT.getSimpleVT(), SrcElts); | |||
31595 | unsigned Opc = N->getOpcode(); | |||
31596 | if (NumElts != SrcElts) { | |||
31597 | if (IsStrict) | |||
31598 | Opc = IsSigned ? X86ISD::STRICT_CVTTP2SI : X86ISD::STRICT_CVTTP2UI; | |||
31599 | else | |||
31600 | Opc = IsSigned ? X86ISD::CVTTP2SI : X86ISD::CVTTP2UI; | |||
31601 | } | |||
31602 | ||||
31603 | SDValue ZeroIdx = DAG.getIntPtrConstant(0, dl); | |||
31604 | SDValue Res = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VecInVT, | |||
31605 | DAG.getConstantFP(0.0, dl, VecInVT), Src, | |||
31606 | ZeroIdx); | |||
31607 | SDValue Chain; | |||
31608 | if (IsStrict) { | |||
31609 | SDVTList Tys = DAG.getVTList(VecVT, MVT::Other); | |||
31610 | Res = DAG.getNode(Opc, SDLoc(N), Tys, N->getOperand(0), Res); | |||
31611 | Chain = Res.getValue(1); | |||
31612 | } else | |||
31613 | Res = DAG.getNode(Opc, SDLoc(N), VecVT, Res); | |||
31614 | Res = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, VT, Res, ZeroIdx); | |||
31615 | Results.push_back(Res); | |||
31616 | if (IsStrict) | |||
31617 | Results.push_back(Chain); | |||
31618 | return; | |||
31619 | } | |||
31620 | ||||
31621 | SDValue Chain; | |||
31622 | if (SDValue V = FP_TO_INTHelper(SDValue(N, 0), DAG, IsSigned, Chain)) { | |||
31623 | Results.push_back(V); | |||
31624 | if (IsStrict) | |||
31625 | Results.push_back(Chain); | |||
31626 | } | |||
31627 | return; | |||
31628 | } | |||
31629 | case ISD::LRINT: | |||
31630 | case ISD::LLRINT: { | |||
31631 | if (SDValue V = LRINT_LLRINTHelper(N, DAG)) | |||
31632 | Results.push_back(V); | |||
31633 | return; | |||
31634 | } | |||
31635 | ||||
31636 | case ISD::SINT_TO_FP: | |||
31637 | case ISD::STRICT_SINT_TO_FP: | |||
31638 | case ISD::UINT_TO_FP: | |||
31639 | case ISD::STRICT_UINT_TO_FP: { | |||
31640 | bool IsStrict = N->isStrictFPOpcode(); | |||
31641 | bool IsSigned = N->getOpcode() == ISD::SINT_TO_FP || | |||
31642 | N->getOpcode() == ISD::STRICT_SINT_TO_FP; | |||
31643 | EVT VT = N->getValueType(0); | |||
31644 | SDValue Src = N->getOperand(IsStrict ? 1 : 0); | |||
31645 | if (VT.getVectorElementType() == MVT::f16 && Subtarget.hasFP16() && | |||
31646 | Subtarget.hasVLX()) { | |||
31647 | if (Src.getValueType().getVectorElementType() == MVT::i16) | |||
31648 | return; | |||
31649 | ||||
31650 | if (VT == MVT::v2f16 && Src.getValueType() == MVT::v2i32) | |||
31651 | Src = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v4i32, Src, | |||
31652 | IsStrict ? DAG.getConstant(0, dl, MVT::v2i32) | |||
31653 | : DAG.getUNDEF(MVT::v2i32)); | |||
31654 | if (IsStrict) { | |||
31655 | unsigned Opc = | |||
31656 | IsSigned ? X86ISD::STRICT_CVTSI2P : X86ISD::STRICT_CVTUI2P; | |||
31657 | SDValue Res = DAG.getNode(Opc, dl, {MVT::v8f16, MVT::Other}, | |||
31658 | {N->getOperand(0), Src}); | |||
31659 | Results.push_back(Res); | |||
31660 | Results.push_back(Res.getValue(1)); | |||
31661 | } else { | |||
31662 | unsigned Opc = IsSigned ? X86ISD::CVTSI2P : X86ISD::CVTUI2P; | |||
31663 | Results.push_back(DAG.getNode(Opc, dl, MVT::v8f16, Src)); | |||
31664 | } | |||
31665 | return; | |||
31666 | } | |||
31667 | if (VT != MVT::v2f32) | |||
31668 | return; | |||
31669 | EVT SrcVT = Src.getValueType(); | |||
31670 | if (Subtarget.hasDQI() && Subtarget.hasVLX() && SrcVT == MVT::v2i64) { | |||
31671 | if (IsStrict) { | |||
31672 | unsigned Opc = IsSigned ? X86ISD::STRICT_CVTSI2P | |||
31673 | : X86ISD::STRICT_CVTUI2P; | |||
31674 | SDValue Res = DAG.getNode(Opc, dl, {MVT::v4f32, MVT::Other}, | |||
31675 | {N->getOperand(0), Src}); | |||
31676 | Results.push_back(Res); | |||
31677 | Results.push_back(Res.getValue(1)); | |||
31678 | } else { | |||
31679 | unsigned Opc = IsSigned ? X86ISD::CVTSI2P : X86ISD::CVTUI2P; | |||
31680 | Results.push_back(DAG.getNode(Opc, dl, MVT::v4f32, Src)); | |||
31681 | } | |||
31682 | return; | |||
31683 | } | |||
31684 | if (SrcVT == MVT::v2i64 && !IsSigned && Subtarget.is64Bit() && | |||
31685 | Subtarget.hasSSE41() && !Subtarget.hasAVX512()) { | |||
31686 | SDValue Zero = DAG.getConstant(0, dl, SrcVT); | |||
31687 | SDValue One = DAG.getConstant(1, dl, SrcVT); | |||
31688 | SDValue Sign = DAG.getNode(ISD::OR, dl, SrcVT, | |||
31689 | DAG.getNode(ISD::SRL, dl, SrcVT, Src, One), | |||
31690 | DAG.getNode(ISD::AND, dl, SrcVT, Src, One)); | |||
31691 | SDValue IsNeg = DAG.getSetCC(dl, MVT::v2i64, Src, Zero, ISD::SETLT); | |||
31692 | SDValue SignSrc = DAG.getSelect(dl, SrcVT, IsNeg, Sign, Src); | |||
31693 | SmallVector<SDValue, 4> SignCvts(4, DAG.getConstantFP(0.0, dl, MVT::f32)); | |||
31694 | for (int i = 0; i != 2; ++i) { | |||
31695 | SDValue Elt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i64, | |||
31696 | SignSrc, DAG.getIntPtrConstant(i, dl)); | |||
31697 | if (IsStrict) | |||
31698 | SignCvts[i] = | |||
31699 | DAG.getNode(ISD::STRICT_SINT_TO_FP, dl, {MVT::f32, MVT::Other}, | |||
31700 | {N->getOperand(0), Elt}); | |||
31701 | else | |||
31702 | SignCvts[i] = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::f32, Elt); | |||
31703 | }; | |||
31704 | SDValue SignCvt = DAG.getBuildVector(MVT::v4f32, dl, SignCvts); | |||
31705 | SDValue Slow, Chain; | |||
31706 | if (IsStrict) { | |||
31707 | Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, | |||
31708 | SignCvts[0].getValue(1), SignCvts[1].getValue(1)); | |||
31709 | Slow = DAG.getNode(ISD::STRICT_FADD, dl, {MVT::v4f32, MVT::Other}, | |||
31710 | {Chain, SignCvt, SignCvt}); | |||
31711 | Chain = Slow.getValue(1); | |||
31712 | } else { | |||
31713 | Slow = DAG.getNode(ISD::FADD, dl, MVT::v4f32, SignCvt, SignCvt); | |||
31714 | } | |||
31715 | IsNeg = DAG.getBitcast(MVT::v4i32, IsNeg); | |||
31716 | IsNeg = | |||
31717 | DAG.getVectorShuffle(MVT::v4i32, dl, IsNeg, IsNeg, {1, 3, -1, -1}); | |||
31718 | SDValue Cvt = DAG.getSelect(dl, MVT::v4f32, IsNeg, Slow, SignCvt); | |||
31719 | Results.push_back(Cvt); | |||
31720 | if (IsStrict) | |||
31721 | Results.push_back(Chain); | |||
31722 | return; | |||
31723 | } | |||
31724 | ||||
31725 | if (SrcVT != MVT::v2i32) | |||
31726 | return; | |||
31727 | ||||
31728 | if (IsSigned || Subtarget.hasAVX512()) { | |||
31729 | if (!IsStrict) | |||
31730 | return; | |||
31731 | ||||
31732 | // Custom widen strict v2i32->v2f32 to avoid scalarization. | |||
31733 | // FIXME: Should generic type legalizer do this? | |||
31734 | Src = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v4i32, Src, | |||
31735 | DAG.getConstant(0, dl, MVT::v2i32)); | |||
31736 | SDValue Res = DAG.getNode(N->getOpcode(), dl, {MVT::v4f32, MVT::Other}, | |||
31737 | {N->getOperand(0), Src}); | |||
31738 | Results.push_back(Res); | |||
31739 | Results.push_back(Res.getValue(1)); | |||
31740 | return; | |||
31741 | } | |||
31742 | ||||
31743 | assert(Subtarget.hasSSE2() && "Requires at least SSE2!")(static_cast <bool> (Subtarget.hasSSE2() && "Requires at least SSE2!" ) ? void (0) : __assert_fail ("Subtarget.hasSSE2() && \"Requires at least SSE2!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31743, __extension__ __PRETTY_FUNCTION__)); | |||
31744 | SDValue ZExtIn = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::v2i64, Src); | |||
31745 | SDValue VBias = | |||
31746 | DAG.getConstantFP(BitsToDouble(0x4330000000000000ULL), dl, MVT::v2f64); | |||
31747 | SDValue Or = DAG.getNode(ISD::OR, dl, MVT::v2i64, ZExtIn, | |||
31748 | DAG.getBitcast(MVT::v2i64, VBias)); | |||
31749 | Or = DAG.getBitcast(MVT::v2f64, Or); | |||
31750 | if (IsStrict) { | |||
31751 | SDValue Sub = DAG.getNode(ISD::STRICT_FSUB, dl, {MVT::v2f64, MVT::Other}, | |||
31752 | {N->getOperand(0), Or, VBias}); | |||
31753 | SDValue Res = DAG.getNode(X86ISD::STRICT_VFPROUND, dl, | |||
31754 | {MVT::v4f32, MVT::Other}, | |||
31755 | {Sub.getValue(1), Sub}); | |||
31756 | Results.push_back(Res); | |||
31757 | Results.push_back(Res.getValue(1)); | |||
31758 | } else { | |||
31759 | // TODO: Are there any fast-math-flags to propagate here? | |||
31760 | SDValue Sub = DAG.getNode(ISD::FSUB, dl, MVT::v2f64, Or, VBias); | |||
31761 | Results.push_back(DAG.getNode(X86ISD::VFPROUND, dl, MVT::v4f32, Sub)); | |||
31762 | } | |||
31763 | return; | |||
31764 | } | |||
31765 | case ISD::STRICT_FP_ROUND: | |||
31766 | case ISD::FP_ROUND: { | |||
31767 | bool IsStrict = N->isStrictFPOpcode(); | |||
31768 | SDValue Src = N->getOperand(IsStrict ? 1 : 0); | |||
31769 | EVT VT = N->getValueType(0); | |||
31770 | EVT NewVT = VT.getVectorElementType() == MVT::f16 ? MVT::v8f16 : MVT::v4f32; | |||
31771 | if (VT == MVT::v2f16 && Src.getValueType() == MVT::v2f32) { | |||
31772 | SDValue Ext = IsStrict ? DAG.getConstantFP(0.0, dl, MVT::v2f32) | |||
31773 | : DAG.getUNDEF(MVT::v2f32); | |||
31774 | Src = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v4f32, Src, Ext); | |||
31775 | } | |||
31776 | if (!isTypeLegal(Src.getValueType())) | |||
31777 | return; | |||
31778 | SDValue V; | |||
31779 | if (IsStrict) | |||
31780 | V = DAG.getNode(X86ISD::STRICT_VFPROUND, dl, {NewVT, MVT::Other}, | |||
31781 | {N->getOperand(0), Src}); | |||
31782 | else | |||
31783 | V = DAG.getNode(X86ISD::VFPROUND, dl, NewVT, Src); | |||
31784 | Results.push_back(V); | |||
31785 | if (IsStrict) | |||
31786 | Results.push_back(V.getValue(1)); | |||
31787 | return; | |||
31788 | } | |||
31789 | case ISD::FP_EXTEND: | |||
31790 | case ISD::STRICT_FP_EXTEND: { | |||
31791 | // Right now, only MVT::v2f32 has OperationAction for FP_EXTEND. | |||
31792 | // No other ValueType for FP_EXTEND should reach this point. | |||
31793 | assert(N->getValueType(0) == MVT::v2f32 &&(static_cast <bool> (N->getValueType(0) == MVT::v2f32 && "Do not know how to legalize this Node") ? void ( 0) : __assert_fail ("N->getValueType(0) == MVT::v2f32 && \"Do not know how to legalize this Node\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31794, __extension__ __PRETTY_FUNCTION__)) | |||
31794 | "Do not know how to legalize this Node")(static_cast <bool> (N->getValueType(0) == MVT::v2f32 && "Do not know how to legalize this Node") ? void ( 0) : __assert_fail ("N->getValueType(0) == MVT::v2f32 && \"Do not know how to legalize this Node\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31794, __extension__ __PRETTY_FUNCTION__)); | |||
31795 | if (!Subtarget.hasFP16() || !Subtarget.hasVLX()) | |||
31796 | return; | |||
31797 | bool IsStrict = N->isStrictFPOpcode(); | |||
31798 | SDValue Src = N->getOperand(IsStrict ? 1 : 0); | |||
31799 | SDValue Ext = IsStrict ? DAG.getConstantFP(0.0, dl, MVT::v2f16) | |||
31800 | : DAG.getUNDEF(MVT::v2f16); | |||
31801 | SDValue V = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v4f16, Src, Ext); | |||
31802 | if (IsStrict) | |||
31803 | V = DAG.getNode(ISD::STRICT_FP_EXTEND, dl, {MVT::v4f32, MVT::Other}, | |||
31804 | {N->getOperand(0), V}); | |||
31805 | else | |||
31806 | V = DAG.getNode(ISD::FP_EXTEND, dl, MVT::v4f32, V); | |||
31807 | Results.push_back(V); | |||
31808 | if (IsStrict) | |||
31809 | Results.push_back(V.getValue(1)); | |||
31810 | return; | |||
31811 | } | |||
31812 | case ISD::INTRINSIC_W_CHAIN: { | |||
31813 | unsigned IntNo = N->getConstantOperandVal(1); | |||
31814 | switch (IntNo) { | |||
31815 | default : llvm_unreachable("Do not know how to custom type "::llvm::llvm_unreachable_internal("Do not know how to custom type " "legalize this intrinsic operation!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31816) | |||
31816 | "legalize this intrinsic operation!")::llvm::llvm_unreachable_internal("Do not know how to custom type " "legalize this intrinsic operation!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31816); | |||
31817 | case Intrinsic::x86_rdtsc: | |||
31818 | return getReadTimeStampCounter(N, dl, X86::RDTSC, DAG, Subtarget, | |||
31819 | Results); | |||
31820 | case Intrinsic::x86_rdtscp: | |||
31821 | return getReadTimeStampCounter(N, dl, X86::RDTSCP, DAG, Subtarget, | |||
31822 | Results); | |||
31823 | case Intrinsic::x86_rdpmc: | |||
31824 | expandIntrinsicWChainHelper(N, dl, DAG, X86::RDPMC, X86::ECX, Subtarget, | |||
31825 | Results); | |||
31826 | return; | |||
31827 | case Intrinsic::x86_xgetbv: | |||
31828 | expandIntrinsicWChainHelper(N, dl, DAG, X86::XGETBV, X86::ECX, Subtarget, | |||
31829 | Results); | |||
31830 | return; | |||
31831 | } | |||
31832 | } | |||
31833 | case ISD::READCYCLECOUNTER: { | |||
31834 | return getReadTimeStampCounter(N, dl, X86::RDTSC, DAG, Subtarget, Results); | |||
31835 | } | |||
31836 | case ISD::ATOMIC_CMP_SWAP_WITH_SUCCESS: { | |||
31837 | EVT T = N->getValueType(0); | |||
31838 | assert((T == MVT::i64 || T == MVT::i128) && "can only expand cmpxchg pair")(static_cast <bool> ((T == MVT::i64 || T == MVT::i128) && "can only expand cmpxchg pair") ? void (0) : __assert_fail ( "(T == MVT::i64 || T == MVT::i128) && \"can only expand cmpxchg pair\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31838, __extension__ __PRETTY_FUNCTION__)); | |||
31839 | bool Regs64bit = T == MVT::i128; | |||
31840 | assert((!Regs64bit || Subtarget.hasCmpxchg16b()) &&(static_cast <bool> ((!Regs64bit || Subtarget.hasCmpxchg16b ()) && "64-bit ATOMIC_CMP_SWAP_WITH_SUCCESS requires CMPXCHG16B" ) ? void (0) : __assert_fail ("(!Regs64bit || Subtarget.hasCmpxchg16b()) && \"64-bit ATOMIC_CMP_SWAP_WITH_SUCCESS requires CMPXCHG16B\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31841, __extension__ __PRETTY_FUNCTION__)) | |||
31841 | "64-bit ATOMIC_CMP_SWAP_WITH_SUCCESS requires CMPXCHG16B")(static_cast <bool> ((!Regs64bit || Subtarget.hasCmpxchg16b ()) && "64-bit ATOMIC_CMP_SWAP_WITH_SUCCESS requires CMPXCHG16B" ) ? void (0) : __assert_fail ("(!Regs64bit || Subtarget.hasCmpxchg16b()) && \"64-bit ATOMIC_CMP_SWAP_WITH_SUCCESS requires CMPXCHG16B\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31841, __extension__ __PRETTY_FUNCTION__)); | |||
31842 | MVT HalfT = Regs64bit ? MVT::i64 : MVT::i32; | |||
31843 | SDValue cpInL, cpInH; | |||
31844 | cpInL = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, HalfT, N->getOperand(2), | |||
31845 | DAG.getConstant(0, dl, HalfT)); | |||
31846 | cpInH = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, HalfT, N->getOperand(2), | |||
31847 | DAG.getConstant(1, dl, HalfT)); | |||
31848 | cpInL = DAG.getCopyToReg(N->getOperand(0), dl, | |||
31849 | Regs64bit ? X86::RAX : X86::EAX, | |||
31850 | cpInL, SDValue()); | |||
31851 | cpInH = DAG.getCopyToReg(cpInL.getValue(0), dl, | |||
31852 | Regs64bit ? X86::RDX : X86::EDX, | |||
31853 | cpInH, cpInL.getValue(1)); | |||
31854 | SDValue swapInL, swapInH; | |||
31855 | swapInL = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, HalfT, N->getOperand(3), | |||
31856 | DAG.getConstant(0, dl, HalfT)); | |||
31857 | swapInH = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, HalfT, N->getOperand(3), | |||
31858 | DAG.getConstant(1, dl, HalfT)); | |||
31859 | swapInH = | |||
31860 | DAG.getCopyToReg(cpInH.getValue(0), dl, Regs64bit ? X86::RCX : X86::ECX, | |||
31861 | swapInH, cpInH.getValue(1)); | |||
31862 | ||||
31863 | // In 64-bit mode we might need the base pointer in RBX, but we can't know | |||
31864 | // until later. So we keep the RBX input in a vreg and use a custom | |||
31865 | // inserter. | |||
31866 | // Since RBX will be a reserved register the register allocator will not | |||
31867 | // make sure its value will be properly saved and restored around this | |||
31868 | // live-range. | |||
31869 | SDValue Result; | |||
31870 | SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Glue); | |||
31871 | MachineMemOperand *MMO = cast<AtomicSDNode>(N)->getMemOperand(); | |||
31872 | if (Regs64bit) { | |||
31873 | SDValue Ops[] = {swapInH.getValue(0), N->getOperand(1), swapInL, | |||
31874 | swapInH.getValue(1)}; | |||
31875 | Result = | |||
31876 | DAG.getMemIntrinsicNode(X86ISD::LCMPXCHG16_DAG, dl, Tys, Ops, T, MMO); | |||
31877 | } else { | |||
31878 | swapInL = DAG.getCopyToReg(swapInH.getValue(0), dl, X86::EBX, swapInL, | |||
31879 | swapInH.getValue(1)); | |||
31880 | SDValue Ops[] = {swapInL.getValue(0), N->getOperand(1), | |||
31881 | swapInL.getValue(1)}; | |||
31882 | Result = | |||
31883 | DAG.getMemIntrinsicNode(X86ISD::LCMPXCHG8_DAG, dl, Tys, Ops, T, MMO); | |||
31884 | } | |||
31885 | ||||
31886 | SDValue cpOutL = DAG.getCopyFromReg(Result.getValue(0), dl, | |||
31887 | Regs64bit ? X86::RAX : X86::EAX, | |||
31888 | HalfT, Result.getValue(1)); | |||
31889 | SDValue cpOutH = DAG.getCopyFromReg(cpOutL.getValue(1), dl, | |||
31890 | Regs64bit ? X86::RDX : X86::EDX, | |||
31891 | HalfT, cpOutL.getValue(2)); | |||
31892 | SDValue OpsF[] = { cpOutL.getValue(0), cpOutH.getValue(0)}; | |||
31893 | ||||
31894 | SDValue EFLAGS = DAG.getCopyFromReg(cpOutH.getValue(1), dl, X86::EFLAGS, | |||
31895 | MVT::i32, cpOutH.getValue(2)); | |||
31896 | SDValue Success = getSETCC(X86::COND_E, EFLAGS, dl, DAG); | |||
31897 | Success = DAG.getZExtOrTrunc(Success, dl, N->getValueType(1)); | |||
31898 | ||||
31899 | Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, T, OpsF)); | |||
31900 | Results.push_back(Success); | |||
31901 | Results.push_back(EFLAGS.getValue(1)); | |||
31902 | return; | |||
31903 | } | |||
31904 | case ISD::ATOMIC_LOAD: { | |||
31905 | assert(N->getValueType(0) == MVT::i64 && "Unexpected VT!")(static_cast <bool> (N->getValueType(0) == MVT::i64 && "Unexpected VT!") ? void (0) : __assert_fail ("N->getValueType(0) == MVT::i64 && \"Unexpected VT!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31905, __extension__ __PRETTY_FUNCTION__)); | |||
31906 | bool NoImplicitFloatOps = | |||
31907 | DAG.getMachineFunction().getFunction().hasFnAttribute( | |||
31908 | Attribute::NoImplicitFloat); | |||
31909 | if (!Subtarget.useSoftFloat() && !NoImplicitFloatOps) { | |||
31910 | auto *Node = cast<AtomicSDNode>(N); | |||
31911 | if (Subtarget.hasSSE1()) { | |||
31912 | // Use a VZEXT_LOAD which will be selected as MOVQ or XORPS+MOVLPS. | |||
31913 | // Then extract the lower 64-bits. | |||
31914 | MVT LdVT = Subtarget.hasSSE2() ? MVT::v2i64 : MVT::v4f32; | |||
31915 | SDVTList Tys = DAG.getVTList(LdVT, MVT::Other); | |||
31916 | SDValue Ops[] = { Node->getChain(), Node->getBasePtr() }; | |||
31917 | SDValue Ld = DAG.getMemIntrinsicNode(X86ISD::VZEXT_LOAD, dl, Tys, Ops, | |||
31918 | MVT::i64, Node->getMemOperand()); | |||
31919 | if (Subtarget.hasSSE2()) { | |||
31920 | SDValue Res = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i64, Ld, | |||
31921 | DAG.getIntPtrConstant(0, dl)); | |||
31922 | Results.push_back(Res); | |||
31923 | Results.push_back(Ld.getValue(1)); | |||
31924 | return; | |||
31925 | } | |||
31926 | // We use an alternative sequence for SSE1 that extracts as v2f32 and | |||
31927 | // then casts to i64. This avoids a 128-bit stack temporary being | |||
31928 | // created by type legalization if we were to cast v4f32->v2i64. | |||
31929 | SDValue Res = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v2f32, Ld, | |||
31930 | DAG.getIntPtrConstant(0, dl)); | |||
31931 | Res = DAG.getBitcast(MVT::i64, Res); | |||
31932 | Results.push_back(Res); | |||
31933 | Results.push_back(Ld.getValue(1)); | |||
31934 | return; | |||
31935 | } | |||
31936 | if (Subtarget.hasX87()) { | |||
31937 | // First load this into an 80-bit X87 register. This will put the whole | |||
31938 | // integer into the significand. | |||
31939 | SDVTList Tys = DAG.getVTList(MVT::f80, MVT::Other); | |||
31940 | SDValue Ops[] = { Node->getChain(), Node->getBasePtr() }; | |||
31941 | SDValue Result = DAG.getMemIntrinsicNode(X86ISD::FILD, | |||
31942 | dl, Tys, Ops, MVT::i64, | |||
31943 | Node->getMemOperand()); | |||
31944 | SDValue Chain = Result.getValue(1); | |||
31945 | ||||
31946 | // Now store the X87 register to a stack temporary and convert to i64. | |||
31947 | // This store is not atomic and doesn't need to be. | |||
31948 | // FIXME: We don't need a stack temporary if the result of the load | |||
31949 | // is already being stored. We could just directly store there. | |||
31950 | SDValue StackPtr = DAG.CreateStackTemporary(MVT::i64); | |||
31951 | int SPFI = cast<FrameIndexSDNode>(StackPtr.getNode())->getIndex(); | |||
31952 | MachinePointerInfo MPI = | |||
31953 | MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), SPFI); | |||
31954 | SDValue StoreOps[] = { Chain, Result, StackPtr }; | |||
31955 | Chain = DAG.getMemIntrinsicNode( | |||
31956 | X86ISD::FIST, dl, DAG.getVTList(MVT::Other), StoreOps, MVT::i64, | |||
31957 | MPI, None /*Align*/, MachineMemOperand::MOStore); | |||
31958 | ||||
31959 | // Finally load the value back from the stack temporary and return it. | |||
31960 | // This load is not atomic and doesn't need to be. | |||
31961 | // This load will be further type legalized. | |||
31962 | Result = DAG.getLoad(MVT::i64, dl, Chain, StackPtr, MPI); | |||
31963 | Results.push_back(Result); | |||
31964 | Results.push_back(Result.getValue(1)); | |||
31965 | return; | |||
31966 | } | |||
31967 | } | |||
31968 | // TODO: Use MOVLPS when SSE1 is available? | |||
31969 | // Delegate to generic TypeLegalization. Situations we can really handle | |||
31970 | // should have already been dealt with by AtomicExpandPass.cpp. | |||
31971 | break; | |||
31972 | } | |||
31973 | case ISD::ATOMIC_SWAP: | |||
31974 | case ISD::ATOMIC_LOAD_ADD: | |||
31975 | case ISD::ATOMIC_LOAD_SUB: | |||
31976 | case ISD::ATOMIC_LOAD_AND: | |||
31977 | case ISD::ATOMIC_LOAD_OR: | |||
31978 | case ISD::ATOMIC_LOAD_XOR: | |||
31979 | case ISD::ATOMIC_LOAD_NAND: | |||
31980 | case ISD::ATOMIC_LOAD_MIN: | |||
31981 | case ISD::ATOMIC_LOAD_MAX: | |||
31982 | case ISD::ATOMIC_LOAD_UMIN: | |||
31983 | case ISD::ATOMIC_LOAD_UMAX: | |||
31984 | // Delegate to generic TypeLegalization. Situations we can really handle | |||
31985 | // should have already been dealt with by AtomicExpandPass.cpp. | |||
31986 | break; | |||
31987 | ||||
31988 | case ISD::BITCAST: { | |||
31989 | assert(Subtarget.hasSSE2() && "Requires at least SSE2!")(static_cast <bool> (Subtarget.hasSSE2() && "Requires at least SSE2!" ) ? void (0) : __assert_fail ("Subtarget.hasSSE2() && \"Requires at least SSE2!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31989, __extension__ __PRETTY_FUNCTION__)); | |||
31990 | EVT DstVT = N->getValueType(0); | |||
31991 | EVT SrcVT = N->getOperand(0).getValueType(); | |||
31992 | ||||
31993 | // If this is a bitcast from a v64i1 k-register to a i64 on a 32-bit target | |||
31994 | // we can split using the k-register rather than memory. | |||
31995 | if (SrcVT == MVT::v64i1 && DstVT == MVT::i64 && Subtarget.hasBWI()) { | |||
31996 | assert(!Subtarget.is64Bit() && "Expected 32-bit mode")(static_cast <bool> (!Subtarget.is64Bit() && "Expected 32-bit mode" ) ? void (0) : __assert_fail ("!Subtarget.is64Bit() && \"Expected 32-bit mode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 31996, __extension__ __PRETTY_FUNCTION__)); | |||
31997 | SDValue Lo, Hi; | |||
31998 | std::tie(Lo, Hi) = DAG.SplitVectorOperand(N, 0); | |||
31999 | Lo = DAG.getBitcast(MVT::i32, Lo); | |||
32000 | Hi = DAG.getBitcast(MVT::i32, Hi); | |||
32001 | SDValue Res = DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Lo, Hi); | |||
32002 | Results.push_back(Res); | |||
32003 | return; | |||
32004 | } | |||
32005 | ||||
32006 | if (DstVT.isVector() && SrcVT == MVT::x86mmx) { | |||
32007 | // FIXME: Use v4f32 for SSE1? | |||
32008 | assert(Subtarget.hasSSE2() && "Requires SSE2")(static_cast <bool> (Subtarget.hasSSE2() && "Requires SSE2" ) ? void (0) : __assert_fail ("Subtarget.hasSSE2() && \"Requires SSE2\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 32008, __extension__ __PRETTY_FUNCTION__)); | |||
32009 | assert(getTypeAction(*DAG.getContext(), DstVT) == TypeWidenVector &&(static_cast <bool> (getTypeAction(*DAG.getContext(), DstVT ) == TypeWidenVector && "Unexpected type action!") ? void (0) : __assert_fail ("getTypeAction(*DAG.getContext(), DstVT) == TypeWidenVector && \"Unexpected type action!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 32010, __extension__ __PRETTY_FUNCTION__)) | |||
32010 | "Unexpected type action!")(static_cast <bool> (getTypeAction(*DAG.getContext(), DstVT ) == TypeWidenVector && "Unexpected type action!") ? void (0) : __assert_fail ("getTypeAction(*DAG.getContext(), DstVT) == TypeWidenVector && \"Unexpected type action!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 32010, __extension__ __PRETTY_FUNCTION__)); | |||
32011 | EVT WideVT = getTypeToTransformTo(*DAG.getContext(), DstVT); | |||
32012 | SDValue Res = DAG.getNode(X86ISD::MOVQ2DQ, dl, MVT::v2i64, | |||
32013 | N->getOperand(0)); | |||
32014 | Res = DAG.getBitcast(WideVT, Res); | |||
32015 | Results.push_back(Res); | |||
32016 | return; | |||
32017 | } | |||
32018 | ||||
32019 | return; | |||
32020 | } | |||
32021 | case ISD::MGATHER: { | |||
32022 | EVT VT = N->getValueType(0); | |||
32023 | if ((VT == MVT::v2f32 || VT == MVT::v2i32) && | |||
32024 | (Subtarget.hasVLX() || !Subtarget.hasAVX512())) { | |||
32025 | auto *Gather = cast<MaskedGatherSDNode>(N); | |||
32026 | SDValue Index = Gather->getIndex(); | |||
32027 | if (Index.getValueType() != MVT::v2i64) | |||
32028 | return; | |||
32029 | assert(getTypeAction(*DAG.getContext(), VT) == TypeWidenVector &&(static_cast <bool> (getTypeAction(*DAG.getContext(), VT ) == TypeWidenVector && "Unexpected type action!") ? void (0) : __assert_fail ("getTypeAction(*DAG.getContext(), VT) == TypeWidenVector && \"Unexpected type action!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 32030, __extension__ __PRETTY_FUNCTION__)) | |||
32030 | "Unexpected type action!")(static_cast <bool> (getTypeAction(*DAG.getContext(), VT ) == TypeWidenVector && "Unexpected type action!") ? void (0) : __assert_fail ("getTypeAction(*DAG.getContext(), VT) == TypeWidenVector && \"Unexpected type action!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 32030, __extension__ __PRETTY_FUNCTION__)); | |||
32031 | EVT WideVT = getTypeToTransformTo(*DAG.getContext(), VT); | |||
32032 | SDValue Mask = Gather->getMask(); | |||
32033 | assert(Mask.getValueType() == MVT::v2i1 && "Unexpected mask type")(static_cast <bool> (Mask.getValueType() == MVT::v2i1 && "Unexpected mask type") ? void (0) : __assert_fail ("Mask.getValueType() == MVT::v2i1 && \"Unexpected mask type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 32033, __extension__ __PRETTY_FUNCTION__)); | |||
32034 | SDValue PassThru = DAG.getNode(ISD::CONCAT_VECTORS, dl, WideVT, | |||
32035 | Gather->getPassThru(), | |||
32036 | DAG.getUNDEF(VT)); | |||
32037 | if (!Subtarget.hasVLX()) { | |||
32038 | // We need to widen the mask, but the instruction will only use 2 | |||
32039 | // of its elements. So we can use undef. | |||
32040 | Mask = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v4i1, Mask, | |||
32041 | DAG.getUNDEF(MVT::v2i1)); | |||
32042 | Mask = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v4i32, Mask); | |||
32043 | } | |||
32044 | SDValue Ops[] = { Gather->getChain(), PassThru, Mask, | |||
32045 | Gather->getBasePtr(), Index, Gather->getScale() }; | |||
32046 | SDValue Res = DAG.getMemIntrinsicNode( | |||
32047 | X86ISD::MGATHER, dl, DAG.getVTList(WideVT, MVT::Other), Ops, | |||
32048 | Gather->getMemoryVT(), Gather->getMemOperand()); | |||
32049 | Results.push_back(Res); | |||
32050 | Results.push_back(Res.getValue(1)); | |||
32051 | return; | |||
32052 | } | |||
32053 | return; | |||
32054 | } | |||
32055 | case ISD::LOAD: { | |||
32056 | // Use an f64/i64 load and a scalar_to_vector for v2f32/v2i32 loads. This | |||
32057 | // avoids scalarizing in 32-bit mode. In 64-bit mode this avoids a int->fp | |||
32058 | // cast since type legalization will try to use an i64 load. | |||
32059 | MVT VT = N->getSimpleValueType(0); | |||
32060 | assert(VT.isVector() && VT.getSizeInBits() == 64 && "Unexpected VT")(static_cast <bool> (VT.isVector() && VT.getSizeInBits () == 64 && "Unexpected VT") ? void (0) : __assert_fail ("VT.isVector() && VT.getSizeInBits() == 64 && \"Unexpected VT\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 32060, __extension__ __PRETTY_FUNCTION__)); | |||
32061 | assert(getTypeAction(*DAG.getContext(), VT) == TypeWidenVector &&(static_cast <bool> (getTypeAction(*DAG.getContext(), VT ) == TypeWidenVector && "Unexpected type action!") ? void (0) : __assert_fail ("getTypeAction(*DAG.getContext(), VT) == TypeWidenVector && \"Unexpected type action!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 32062, __extension__ __PRETTY_FUNCTION__)) | |||
32062 | "Unexpected type action!")(static_cast <bool> (getTypeAction(*DAG.getContext(), VT ) == TypeWidenVector && "Unexpected type action!") ? void (0) : __assert_fail ("getTypeAction(*DAG.getContext(), VT) == TypeWidenVector && \"Unexpected type action!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 32062, __extension__ __PRETTY_FUNCTION__)); | |||
32063 | if (!ISD::isNON_EXTLoad(N)) | |||
32064 | return; | |||
32065 | auto *Ld = cast<LoadSDNode>(N); | |||
32066 | if (Subtarget.hasSSE2()) { | |||
32067 | MVT LdVT = Subtarget.is64Bit() && VT.isInteger() ? MVT::i64 : MVT::f64; | |||
32068 | SDValue Res = DAG.getLoad(LdVT, dl, Ld->getChain(), Ld->getBasePtr(), | |||
32069 | Ld->getPointerInfo(), Ld->getOriginalAlign(), | |||
32070 | Ld->getMemOperand()->getFlags()); | |||
32071 | SDValue Chain = Res.getValue(1); | |||
32072 | MVT VecVT = MVT::getVectorVT(LdVT, 2); | |||
32073 | Res = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VecVT, Res); | |||
32074 | EVT WideVT = getTypeToTransformTo(*DAG.getContext(), VT); | |||
32075 | Res = DAG.getBitcast(WideVT, Res); | |||
32076 | Results.push_back(Res); | |||
32077 | Results.push_back(Chain); | |||
32078 | return; | |||
32079 | } | |||
32080 | assert(Subtarget.hasSSE1() && "Expected SSE")(static_cast <bool> (Subtarget.hasSSE1() && "Expected SSE" ) ? void (0) : __assert_fail ("Subtarget.hasSSE1() && \"Expected SSE\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 32080, __extension__ __PRETTY_FUNCTION__)); | |||
32081 | SDVTList Tys = DAG.getVTList(MVT::v4f32, MVT::Other); | |||
32082 | SDValue Ops[] = {Ld->getChain(), Ld->getBasePtr()}; | |||
32083 | SDValue Res = DAG.getMemIntrinsicNode(X86ISD::VZEXT_LOAD, dl, Tys, Ops, | |||
32084 | MVT::i64, Ld->getMemOperand()); | |||
32085 | Results.push_back(Res); | |||
32086 | Results.push_back(Res.getValue(1)); | |||
32087 | return; | |||
32088 | } | |||
32089 | case ISD::ADDRSPACECAST: { | |||
32090 | SDValue V = LowerADDRSPACECAST(SDValue(N,0), DAG); | |||
32091 | Results.push_back(V); | |||
32092 | return; | |||
32093 | } | |||
32094 | case ISD::BITREVERSE: | |||
32095 | assert(N->getValueType(0) == MVT::i64 && "Unexpected VT!")(static_cast <bool> (N->getValueType(0) == MVT::i64 && "Unexpected VT!") ? void (0) : __assert_fail ("N->getValueType(0) == MVT::i64 && \"Unexpected VT!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 32095, __extension__ __PRETTY_FUNCTION__)); | |||
32096 | assert(Subtarget.hasXOP() && "Expected XOP")(static_cast <bool> (Subtarget.hasXOP() && "Expected XOP" ) ? void (0) : __assert_fail ("Subtarget.hasXOP() && \"Expected XOP\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 32096, __extension__ __PRETTY_FUNCTION__)); | |||
32097 | // We can use VPPERM by copying to a vector register and back. We'll need | |||
32098 | // to move the scalar in two i32 pieces. | |||
32099 | Results.push_back(LowerBITREVERSE(SDValue(N, 0), Subtarget, DAG)); | |||
32100 | return; | |||
32101 | } | |||
32102 | } | |||
32103 | ||||
32104 | const char *X86TargetLowering::getTargetNodeName(unsigned Opcode) const { | |||
32105 | switch ((X86ISD::NodeType)Opcode) { | |||
32106 | case X86ISD::FIRST_NUMBER: break; | |||
32107 | #define NODE_NAME_CASE(NODE) case X86ISD::NODE: return "X86ISD::" #NODE; | |||
32108 | NODE_NAME_CASE(BSF) | |||
32109 | NODE_NAME_CASE(BSR) | |||
32110 | NODE_NAME_CASE(FSHL) | |||
32111 | NODE_NAME_CASE(FSHR) | |||
32112 | NODE_NAME_CASE(FAND) | |||
32113 | NODE_NAME_CASE(FANDN) | |||
32114 | NODE_NAME_CASE(FOR) | |||
32115 | NODE_NAME_CASE(FXOR) | |||
32116 | NODE_NAME_CASE(FILD) | |||
32117 | NODE_NAME_CASE(FIST) | |||
32118 | NODE_NAME_CASE(FP_TO_INT_IN_MEM) | |||
32119 | NODE_NAME_CASE(FLD) | |||
32120 | NODE_NAME_CASE(FST) | |||
32121 | NODE_NAME_CASE(CALL) | |||
32122 | NODE_NAME_CASE(CALL_RVMARKER) | |||
32123 | NODE_NAME_CASE(BT) | |||
32124 | NODE_NAME_CASE(CMP) | |||
32125 | NODE_NAME_CASE(FCMP) | |||
32126 | NODE_NAME_CASE(STRICT_FCMP) | |||
32127 | NODE_NAME_CASE(STRICT_FCMPS) | |||
32128 | NODE_NAME_CASE(COMI) | |||
32129 | NODE_NAME_CASE(UCOMI) | |||
32130 | NODE_NAME_CASE(CMPM) | |||
32131 | NODE_NAME_CASE(CMPMM) | |||
32132 | NODE_NAME_CASE(STRICT_CMPM) | |||
32133 | NODE_NAME_CASE(CMPMM_SAE) | |||
32134 | NODE_NAME_CASE(SETCC) | |||
32135 | NODE_NAME_CASE(SETCC_CARRY) | |||
32136 | NODE_NAME_CASE(FSETCC) | |||
32137 | NODE_NAME_CASE(FSETCCM) | |||
32138 | NODE_NAME_CASE(FSETCCM_SAE) | |||
32139 | NODE_NAME_CASE(CMOV) | |||
32140 | NODE_NAME_CASE(BRCOND) | |||
32141 | NODE_NAME_CASE(RET_FLAG) | |||
32142 | NODE_NAME_CASE(IRET) | |||
32143 | NODE_NAME_CASE(REP_STOS) | |||
32144 | NODE_NAME_CASE(REP_MOVS) | |||
32145 | NODE_NAME_CASE(GlobalBaseReg) | |||
32146 | NODE_NAME_CASE(Wrapper) | |||
32147 | NODE_NAME_CASE(WrapperRIP) | |||
32148 | NODE_NAME_CASE(MOVQ2DQ) | |||
32149 | NODE_NAME_CASE(MOVDQ2Q) | |||
32150 | NODE_NAME_CASE(MMX_MOVD2W) | |||
32151 | NODE_NAME_CASE(MMX_MOVW2D) | |||
32152 | NODE_NAME_CASE(PEXTRB) | |||
32153 | NODE_NAME_CASE(PEXTRW) | |||
32154 | NODE_NAME_CASE(INSERTPS) | |||
32155 | NODE_NAME_CASE(PINSRB) | |||
32156 | NODE_NAME_CASE(PINSRW) | |||
32157 | NODE_NAME_CASE(PSHUFB) | |||
32158 | NODE_NAME_CASE(ANDNP) | |||
32159 | NODE_NAME_CASE(BLENDI) | |||
32160 | NODE_NAME_CASE(BLENDV) | |||
32161 | NODE_NAME_CASE(HADD) | |||
32162 | NODE_NAME_CASE(HSUB) | |||
32163 | NODE_NAME_CASE(FHADD) | |||
32164 | NODE_NAME_CASE(FHSUB) | |||
32165 | NODE_NAME_CASE(CONFLICT) | |||
32166 | NODE_NAME_CASE(FMAX) | |||
32167 | NODE_NAME_CASE(FMAXS) | |||
32168 | NODE_NAME_CASE(FMAX_SAE) | |||
32169 | NODE_NAME_CASE(FMAXS_SAE) | |||
32170 | NODE_NAME_CASE(FMIN) | |||
32171 | NODE_NAME_CASE(FMINS) | |||
32172 | NODE_NAME_CASE(FMIN_SAE) | |||
32173 | NODE_NAME_CASE(FMINS_SAE) | |||
32174 | NODE_NAME_CASE(FMAXC) | |||
32175 | NODE_NAME_CASE(FMINC) | |||
32176 | NODE_NAME_CASE(FRSQRT) | |||
32177 | NODE_NAME_CASE(FRCP) | |||
32178 | NODE_NAME_CASE(EXTRQI) | |||
32179 | NODE_NAME_CASE(INSERTQI) | |||
32180 | NODE_NAME_CASE(TLSADDR) | |||
32181 | NODE_NAME_CASE(TLSBASEADDR) | |||
32182 | NODE_NAME_CASE(TLSCALL) | |||
32183 | NODE_NAME_CASE(EH_SJLJ_SETJMP) | |||
32184 | NODE_NAME_CASE(EH_SJLJ_LONGJMP) | |||
32185 | NODE_NAME_CASE(EH_SJLJ_SETUP_DISPATCH) | |||
32186 | NODE_NAME_CASE(EH_RETURN) | |||
32187 | NODE_NAME_CASE(TC_RETURN) | |||
32188 | NODE_NAME_CASE(FNSTCW16m) | |||
32189 | NODE_NAME_CASE(FLDCW16m) | |||
32190 | NODE_NAME_CASE(LCMPXCHG_DAG) | |||
32191 | NODE_NAME_CASE(LCMPXCHG8_DAG) | |||
32192 | NODE_NAME_CASE(LCMPXCHG16_DAG) | |||
32193 | NODE_NAME_CASE(LCMPXCHG16_SAVE_RBX_DAG) | |||
32194 | NODE_NAME_CASE(LADD) | |||
32195 | NODE_NAME_CASE(LSUB) | |||
32196 | NODE_NAME_CASE(LOR) | |||
32197 | NODE_NAME_CASE(LXOR) | |||
32198 | NODE_NAME_CASE(LAND) | |||
32199 | NODE_NAME_CASE(VZEXT_MOVL) | |||
32200 | NODE_NAME_CASE(VZEXT_LOAD) | |||
32201 | NODE_NAME_CASE(VEXTRACT_STORE) | |||
32202 | NODE_NAME_CASE(VTRUNC) | |||
32203 | NODE_NAME_CASE(VTRUNCS) | |||
32204 | NODE_NAME_CASE(VTRUNCUS) | |||
32205 | NODE_NAME_CASE(VMTRUNC) | |||
32206 | NODE_NAME_CASE(VMTRUNCS) | |||
32207 | NODE_NAME_CASE(VMTRUNCUS) | |||
32208 | NODE_NAME_CASE(VTRUNCSTORES) | |||
32209 | NODE_NAME_CASE(VTRUNCSTOREUS) | |||
32210 | NODE_NAME_CASE(VMTRUNCSTORES) | |||
32211 | NODE_NAME_CASE(VMTRUNCSTOREUS) | |||
32212 | NODE_NAME_CASE(VFPEXT) | |||
32213 | NODE_NAME_CASE(STRICT_VFPEXT) | |||
32214 | NODE_NAME_CASE(VFPEXT_SAE) | |||
32215 | NODE_NAME_CASE(VFPEXTS) | |||
32216 | NODE_NAME_CASE(VFPEXTS_SAE) | |||
32217 | NODE_NAME_CASE(VFPROUND) | |||
32218 | NODE_NAME_CASE(STRICT_VFPROUND) | |||
32219 | NODE_NAME_CASE(VMFPROUND) | |||
32220 | NODE_NAME_CASE(VFPROUND_RND) | |||
32221 | NODE_NAME_CASE(VFPROUNDS) | |||
32222 | NODE_NAME_CASE(VFPROUNDS_RND) | |||
32223 | NODE_NAME_CASE(VSHLDQ) | |||
32224 | NODE_NAME_CASE(VSRLDQ) | |||
32225 | NODE_NAME_CASE(VSHL) | |||
32226 | NODE_NAME_CASE(VSRL) | |||
32227 | NODE_NAME_CASE(VSRA) | |||
32228 | NODE_NAME_CASE(VSHLI) | |||
32229 | NODE_NAME_CASE(VSRLI) | |||
32230 | NODE_NAME_CASE(VSRAI) | |||
32231 | NODE_NAME_CASE(VSHLV) | |||
32232 | NODE_NAME_CASE(VSRLV) | |||
32233 | NODE_NAME_CASE(VSRAV) | |||
32234 | NODE_NAME_CASE(VROTLI) | |||
32235 | NODE_NAME_CASE(VROTRI) | |||
32236 | NODE_NAME_CASE(VPPERM) | |||
32237 | NODE_NAME_CASE(CMPP) | |||
32238 | NODE_NAME_CASE(STRICT_CMPP) | |||
32239 | NODE_NAME_CASE(PCMPEQ) | |||
32240 | NODE_NAME_CASE(PCMPGT) | |||
32241 | NODE_NAME_CASE(PHMINPOS) | |||
32242 | NODE_NAME_CASE(ADD) | |||
32243 | NODE_NAME_CASE(SUB) | |||
32244 | NODE_NAME_CASE(ADC) | |||
32245 | NODE_NAME_CASE(SBB) | |||
32246 | NODE_NAME_CASE(SMUL) | |||
32247 | NODE_NAME_CASE(UMUL) | |||
32248 | NODE_NAME_CASE(OR) | |||
32249 | NODE_NAME_CASE(XOR) | |||
32250 | NODE_NAME_CASE(AND) | |||
32251 | NODE_NAME_CASE(BEXTR) | |||
32252 | NODE_NAME_CASE(BEXTRI) | |||
32253 | NODE_NAME_CASE(BZHI) | |||
32254 | NODE_NAME_CASE(PDEP) | |||
32255 | NODE_NAME_CASE(PEXT) | |||
32256 | NODE_NAME_CASE(MUL_IMM) | |||
32257 | NODE_NAME_CASE(MOVMSK) | |||
32258 | NODE_NAME_CASE(PTEST) | |||
32259 | NODE_NAME_CASE(TESTP) | |||
32260 | NODE_NAME_CASE(KORTEST) | |||
32261 | NODE_NAME_CASE(KTEST) | |||
32262 | NODE_NAME_CASE(KADD) | |||
32263 | NODE_NAME_CASE(KSHIFTL) | |||
32264 | NODE_NAME_CASE(KSHIFTR) | |||
32265 | NODE_NAME_CASE(PACKSS) | |||
32266 | NODE_NAME_CASE(PACKUS) | |||
32267 | NODE_NAME_CASE(PALIGNR) | |||
32268 | NODE_NAME_CASE(VALIGN) | |||
32269 | NODE_NAME_CASE(VSHLD) | |||
32270 | NODE_NAME_CASE(VSHRD) | |||
32271 | NODE_NAME_CASE(VSHLDV) | |||
32272 | NODE_NAME_CASE(VSHRDV) | |||
32273 | NODE_NAME_CASE(PSHUFD) | |||
32274 | NODE_NAME_CASE(PSHUFHW) | |||
32275 | NODE_NAME_CASE(PSHUFLW) | |||
32276 | NODE_NAME_CASE(SHUFP) | |||
32277 | NODE_NAME_CASE(SHUF128) | |||
32278 | NODE_NAME_CASE(MOVLHPS) | |||
32279 | NODE_NAME_CASE(MOVHLPS) | |||
32280 | NODE_NAME_CASE(MOVDDUP) | |||
32281 | NODE_NAME_CASE(MOVSHDUP) | |||
32282 | NODE_NAME_CASE(MOVSLDUP) | |||
32283 | NODE_NAME_CASE(MOVSD) | |||
32284 | NODE_NAME_CASE(MOVSS) | |||
32285 | NODE_NAME_CASE(MOVSH) | |||
32286 | NODE_NAME_CASE(UNPCKL) | |||
32287 | NODE_NAME_CASE(UNPCKH) | |||
32288 | NODE_NAME_CASE(VBROADCAST) | |||
32289 | NODE_NAME_CASE(VBROADCAST_LOAD) | |||
32290 | NODE_NAME_CASE(VBROADCASTM) | |||
32291 | NODE_NAME_CASE(SUBV_BROADCAST_LOAD) | |||
32292 | NODE_NAME_CASE(VPERMILPV) | |||
32293 | NODE_NAME_CASE(VPERMILPI) | |||
32294 | NODE_NAME_CASE(VPERM2X128) | |||
32295 | NODE_NAME_CASE(VPERMV) | |||
32296 | NODE_NAME_CASE(VPERMV3) | |||
32297 | NODE_NAME_CASE(VPERMI) | |||
32298 | NODE_NAME_CASE(VPTERNLOG) | |||
32299 | NODE_NAME_CASE(VFIXUPIMM) | |||
32300 | NODE_NAME_CASE(VFIXUPIMM_SAE) | |||
32301 | NODE_NAME_CASE(VFIXUPIMMS) | |||
32302 | NODE_NAME_CASE(VFIXUPIMMS_SAE) | |||
32303 | NODE_NAME_CASE(VRANGE) | |||
32304 | NODE_NAME_CASE(VRANGE_SAE) | |||
32305 | NODE_NAME_CASE(VRANGES) | |||
32306 | NODE_NAME_CASE(VRANGES_SAE) | |||
32307 | NODE_NAME_CASE(PMULUDQ) | |||
32308 | NODE_NAME_CASE(PMULDQ) | |||
32309 | NODE_NAME_CASE(PSADBW) | |||
32310 | NODE_NAME_CASE(DBPSADBW) | |||
32311 | NODE_NAME_CASE(VASTART_SAVE_XMM_REGS) | |||
32312 | NODE_NAME_CASE(VAARG_64) | |||
32313 | NODE_NAME_CASE(VAARG_X32) | |||
32314 | NODE_NAME_CASE(WIN_ALLOCA) | |||
32315 | NODE_NAME_CASE(MEMBARRIER) | |||
32316 | NODE_NAME_CASE(MFENCE) | |||
32317 | NODE_NAME_CASE(SEG_ALLOCA) | |||
32318 | NODE_NAME_CASE(PROBED_ALLOCA) | |||
32319 | NODE_NAME_CASE(RDRAND) | |||
32320 | NODE_NAME_CASE(RDSEED) | |||
32321 | NODE_NAME_CASE(RDPKRU) | |||
32322 | NODE_NAME_CASE(WRPKRU) | |||
32323 | NODE_NAME_CASE(VPMADDUBSW) | |||
32324 | NODE_NAME_CASE(VPMADDWD) | |||
32325 | NODE_NAME_CASE(VPSHA) | |||
32326 | NODE_NAME_CASE(VPSHL) | |||
32327 | NODE_NAME_CASE(VPCOM) | |||
32328 | NODE_NAME_CASE(VPCOMU) | |||
32329 | NODE_NAME_CASE(VPERMIL2) | |||
32330 | NODE_NAME_CASE(FMSUB) | |||
32331 | NODE_NAME_CASE(STRICT_FMSUB) | |||
32332 | NODE_NAME_CASE(FNMADD) | |||
32333 | NODE_NAME_CASE(STRICT_FNMADD) | |||
32334 | NODE_NAME_CASE(FNMSUB) | |||
32335 | NODE_NAME_CASE(STRICT_FNMSUB) | |||
32336 | NODE_NAME_CASE(FMADDSUB) | |||
32337 | NODE_NAME_CASE(FMSUBADD) | |||
32338 | NODE_NAME_CASE(FMADD_RND) | |||
32339 | NODE_NAME_CASE(FNMADD_RND) | |||
32340 | NODE_NAME_CASE(FMSUB_RND) | |||
32341 | NODE_NAME_CASE(FNMSUB_RND) | |||
32342 | NODE_NAME_CASE(FMADDSUB_RND) | |||
32343 | NODE_NAME_CASE(FMSUBADD_RND) | |||
32344 | NODE_NAME_CASE(VPMADD52H) | |||
32345 | NODE_NAME_CASE(VPMADD52L) | |||
32346 | NODE_NAME_CASE(VRNDSCALE) | |||
32347 | NODE_NAME_CASE(STRICT_VRNDSCALE) | |||
32348 | NODE_NAME_CASE(VRNDSCALE_SAE) | |||
32349 | NODE_NAME_CASE(VRNDSCALES) | |||
32350 | NODE_NAME_CASE(VRNDSCALES_SAE) | |||
32351 | NODE_NAME_CASE(VREDUCE) | |||
32352 | NODE_NAME_CASE(VREDUCE_SAE) | |||
32353 | NODE_NAME_CASE(VREDUCES) | |||
32354 | NODE_NAME_CASE(VREDUCES_SAE) | |||
32355 | NODE_NAME_CASE(VGETMANT) | |||
32356 | NODE_NAME_CASE(VGETMANT_SAE) | |||
32357 | NODE_NAME_CASE(VGETMANTS) | |||
32358 | NODE_NAME_CASE(VGETMANTS_SAE) | |||
32359 | NODE_NAME_CASE(PCMPESTR) | |||
32360 | NODE_NAME_CASE(PCMPISTR) | |||
32361 | NODE_NAME_CASE(XTEST) | |||
32362 | NODE_NAME_CASE(COMPRESS) | |||
32363 | NODE_NAME_CASE(EXPAND) | |||
32364 | NODE_NAME_CASE(SELECTS) | |||
32365 | NODE_NAME_CASE(ADDSUB) | |||
32366 | NODE_NAME_CASE(RCP14) | |||
32367 | NODE_NAME_CASE(RCP14S) | |||
32368 | NODE_NAME_CASE(RCP28) | |||
32369 | NODE_NAME_CASE(RCP28_SAE) | |||
32370 | NODE_NAME_CASE(RCP28S) | |||
32371 | NODE_NAME_CASE(RCP28S_SAE) | |||
32372 | NODE_NAME_CASE(EXP2) | |||
32373 | NODE_NAME_CASE(EXP2_SAE) | |||
32374 | NODE_NAME_CASE(RSQRT14) | |||
32375 | NODE_NAME_CASE(RSQRT14S) | |||
32376 | NODE_NAME_CASE(RSQRT28) | |||
32377 | NODE_NAME_CASE(RSQRT28_SAE) | |||
32378 | NODE_NAME_CASE(RSQRT28S) | |||
32379 | NODE_NAME_CASE(RSQRT28S_SAE) | |||
32380 | NODE_NAME_CASE(FADD_RND) | |||
32381 | NODE_NAME_CASE(FADDS) | |||
32382 | NODE_NAME_CASE(FADDS_RND) | |||
32383 | NODE_NAME_CASE(FSUB_RND) | |||
32384 | NODE_NAME_CASE(FSUBS) | |||
32385 | NODE_NAME_CASE(FSUBS_RND) | |||
32386 | NODE_NAME_CASE(FMUL_RND) | |||
32387 | NODE_NAME_CASE(FMULS) | |||
32388 | NODE_NAME_CASE(FMULS_RND) | |||
32389 | NODE_NAME_CASE(FDIV_RND) | |||
32390 | NODE_NAME_CASE(FDIVS) | |||
32391 | NODE_NAME_CASE(FDIVS_RND) | |||
32392 | NODE_NAME_CASE(FSQRT_RND) | |||
32393 | NODE_NAME_CASE(FSQRTS) | |||
32394 | NODE_NAME_CASE(FSQRTS_RND) | |||
32395 | NODE_NAME_CASE(FGETEXP) | |||
32396 | NODE_NAME_CASE(FGETEXP_SAE) | |||
32397 | NODE_NAME_CASE(FGETEXPS) | |||
32398 | NODE_NAME_CASE(FGETEXPS_SAE) | |||
32399 | NODE_NAME_CASE(SCALEF) | |||
32400 | NODE_NAME_CASE(SCALEF_RND) | |||
32401 | NODE_NAME_CASE(SCALEFS) | |||
32402 | NODE_NAME_CASE(SCALEFS_RND) | |||
32403 | NODE_NAME_CASE(AVG) | |||
32404 | NODE_NAME_CASE(MULHRS) | |||
32405 | NODE_NAME_CASE(SINT_TO_FP_RND) | |||
32406 | NODE_NAME_CASE(UINT_TO_FP_RND) | |||
32407 | NODE_NAME_CASE(CVTTP2SI) | |||
32408 | NODE_NAME_CASE(CVTTP2UI) | |||
32409 | NODE_NAME_CASE(STRICT_CVTTP2SI) | |||
32410 | NODE_NAME_CASE(STRICT_CVTTP2UI) | |||
32411 | NODE_NAME_CASE(MCVTTP2SI) | |||
32412 | NODE_NAME_CASE(MCVTTP2UI) | |||
32413 | NODE_NAME_CASE(CVTTP2SI_SAE) | |||
32414 | NODE_NAME_CASE(CVTTP2UI_SAE) | |||
32415 | NODE_NAME_CASE(CVTTS2SI) | |||
32416 | NODE_NAME_CASE(CVTTS2UI) | |||
32417 | NODE_NAME_CASE(CVTTS2SI_SAE) | |||
32418 | NODE_NAME_CASE(CVTTS2UI_SAE) | |||
32419 | NODE_NAME_CASE(CVTSI2P) | |||
32420 | NODE_NAME_CASE(CVTUI2P) | |||
32421 | NODE_NAME_CASE(STRICT_CVTSI2P) | |||
32422 | NODE_NAME_CASE(STRICT_CVTUI2P) | |||
32423 | NODE_NAME_CASE(MCVTSI2P) | |||
32424 | NODE_NAME_CASE(MCVTUI2P) | |||
32425 | NODE_NAME_CASE(VFPCLASS) | |||
32426 | NODE_NAME_CASE(VFPCLASSS) | |||
32427 | NODE_NAME_CASE(MULTISHIFT) | |||
32428 | NODE_NAME_CASE(SCALAR_SINT_TO_FP) | |||
32429 | NODE_NAME_CASE(SCALAR_SINT_TO_FP_RND) | |||
32430 | NODE_NAME_CASE(SCALAR_UINT_TO_FP) | |||
32431 | NODE_NAME_CASE(SCALAR_UINT_TO_FP_RND) | |||
32432 | NODE_NAME_CASE(CVTPS2PH) | |||
32433 | NODE_NAME_CASE(STRICT_CVTPS2PH) | |||
32434 | NODE_NAME_CASE(MCVTPS2PH) | |||
32435 | NODE_NAME_CASE(CVTPH2PS) | |||
32436 | NODE_NAME_CASE(STRICT_CVTPH2PS) | |||
32437 | NODE_NAME_CASE(CVTPH2PS_SAE) | |||
32438 | NODE_NAME_CASE(CVTP2SI) | |||
32439 | NODE_NAME_CASE(CVTP2UI) | |||
32440 | NODE_NAME_CASE(MCVTP2SI) | |||
32441 | NODE_NAME_CASE(MCVTP2UI) | |||
32442 | NODE_NAME_CASE(CVTP2SI_RND) | |||
32443 | NODE_NAME_CASE(CVTP2UI_RND) | |||
32444 | NODE_NAME_CASE(CVTS2SI) | |||
32445 | NODE_NAME_CASE(CVTS2UI) | |||
32446 | NODE_NAME_CASE(CVTS2SI_RND) | |||
32447 | NODE_NAME_CASE(CVTS2UI_RND) | |||
32448 | NODE_NAME_CASE(CVTNE2PS2BF16) | |||
32449 | NODE_NAME_CASE(CVTNEPS2BF16) | |||
32450 | NODE_NAME_CASE(MCVTNEPS2BF16) | |||
32451 | NODE_NAME_CASE(DPBF16PS) | |||
32452 | NODE_NAME_CASE(LWPINS) | |||
32453 | NODE_NAME_CASE(MGATHER) | |||
32454 | NODE_NAME_CASE(MSCATTER) | |||
32455 | NODE_NAME_CASE(VPDPBUSD) | |||
32456 | NODE_NAME_CASE(VPDPBUSDS) | |||
32457 | NODE_NAME_CASE(VPDPWSSD) | |||
32458 | NODE_NAME_CASE(VPDPWSSDS) | |||
32459 | NODE_NAME_CASE(VPSHUFBITQMB) | |||
32460 | NODE_NAME_CASE(GF2P8MULB) | |||
32461 | NODE_NAME_CASE(GF2P8AFFINEQB) | |||
32462 | NODE_NAME_CASE(GF2P8AFFINEINVQB) | |||
32463 | NODE_NAME_CASE(NT_CALL) | |||
32464 | NODE_NAME_CASE(NT_BRIND) | |||
32465 | NODE_NAME_CASE(UMWAIT) | |||
32466 | NODE_NAME_CASE(TPAUSE) | |||
32467 | NODE_NAME_CASE(ENQCMD) | |||
32468 | NODE_NAME_CASE(ENQCMDS) | |||
32469 | NODE_NAME_CASE(VP2INTERSECT) | |||
32470 | NODE_NAME_CASE(AESENC128KL) | |||
32471 | NODE_NAME_CASE(AESDEC128KL) | |||
32472 | NODE_NAME_CASE(AESENC256KL) | |||
32473 | NODE_NAME_CASE(AESDEC256KL) | |||
32474 | NODE_NAME_CASE(AESENCWIDE128KL) | |||
32475 | NODE_NAME_CASE(AESDECWIDE128KL) | |||
32476 | NODE_NAME_CASE(AESENCWIDE256KL) | |||
32477 | NODE_NAME_CASE(AESDECWIDE256KL) | |||
32478 | NODE_NAME_CASE(TESTUI) | |||
32479 | } | |||
32480 | return nullptr; | |||
32481 | #undef NODE_NAME_CASE | |||
32482 | } | |||
32483 | ||||
32484 | /// Return true if the addressing mode represented by AM is legal for this | |||
32485 | /// target, for a load/store of the specified type. | |||
32486 | bool X86TargetLowering::isLegalAddressingMode(const DataLayout &DL, | |||
32487 | const AddrMode &AM, Type *Ty, | |||
32488 | unsigned AS, | |||
32489 | Instruction *I) const { | |||
32490 | // X86 supports extremely general addressing modes. | |||
32491 | CodeModel::Model M = getTargetMachine().getCodeModel(); | |||
32492 | ||||
32493 | // X86 allows a sign-extended 32-bit immediate field as a displacement. | |||
32494 | if (!X86::isOffsetSuitableForCodeModel(AM.BaseOffs, M, AM.BaseGV != nullptr)) | |||
32495 | return false; | |||
32496 | ||||
32497 | if (AM.BaseGV) { | |||
32498 | unsigned GVFlags = Subtarget.classifyGlobalReference(AM.BaseGV); | |||
32499 | ||||
32500 | // If a reference to this global requires an extra load, we can't fold it. | |||
32501 | if (isGlobalStubReference(GVFlags)) | |||
32502 | return false; | |||
32503 | ||||
32504 | // If BaseGV requires a register for the PIC base, we cannot also have a | |||
32505 | // BaseReg specified. | |||
32506 | if (AM.HasBaseReg && isGlobalRelativeToPICBase(GVFlags)) | |||
32507 | return false; | |||
32508 | ||||
32509 | // If lower 4G is not available, then we must use rip-relative addressing. | |||
32510 | if ((M != CodeModel::Small || isPositionIndependent()) && | |||
32511 | Subtarget.is64Bit() && (AM.BaseOffs || AM.Scale > 1)) | |||
32512 | return false; | |||
32513 | } | |||
32514 | ||||
32515 | switch (AM.Scale) { | |||
32516 | case 0: | |||
32517 | case 1: | |||
32518 | case 2: | |||
32519 | case 4: | |||
32520 | case 8: | |||
32521 | // These scales always work. | |||
32522 | break; | |||
32523 | case 3: | |||
32524 | case 5: | |||
32525 | case 9: | |||
32526 | // These scales are formed with basereg+scalereg. Only accept if there is | |||
32527 | // no basereg yet. | |||
32528 | if (AM.HasBaseReg) | |||
32529 | return false; | |||
32530 | break; | |||
32531 | default: // Other stuff never works. | |||
32532 | return false; | |||
32533 | } | |||
32534 | ||||
32535 | return true; | |||
32536 | } | |||
32537 | ||||
32538 | bool X86TargetLowering::isVectorShiftByScalarCheap(Type *Ty) const { | |||
32539 | unsigned Bits = Ty->getScalarSizeInBits(); | |||
32540 | ||||
32541 | // 8-bit shifts are always expensive, but versions with a scalar amount aren't | |||
32542 | // particularly cheaper than those without. | |||
32543 | if (Bits == 8) | |||
32544 | return false; | |||
32545 | ||||
32546 | // XOP has v16i8/v8i16/v4i32/v2i64 variable vector shifts. | |||
32547 | // Splitting for v32i8/v16i16 on XOP+AVX2 targets is still preferred. | |||
32548 | if (Subtarget.hasXOP() && | |||
32549 | (Bits == 8 || Bits == 16 || Bits == 32 || Bits == 64)) | |||
32550 | return false; | |||
32551 | ||||
32552 | // AVX2 has vpsllv[dq] instructions (and other shifts) that make variable | |||
32553 | // shifts just as cheap as scalar ones. | |||
32554 | if (Subtarget.hasAVX2() && (Bits == 32 || Bits == 64)) | |||
32555 | return false; | |||
32556 | ||||
32557 | // AVX512BW has shifts such as vpsllvw. | |||
32558 | if (Subtarget.hasBWI() && Bits == 16) | |||
32559 | return false; | |||
32560 | ||||
32561 | // Otherwise, it's significantly cheaper to shift by a scalar amount than by a | |||
32562 | // fully general vector. | |||
32563 | return true; | |||
32564 | } | |||
32565 | ||||
32566 | bool X86TargetLowering::isBinOp(unsigned Opcode) const { | |||
32567 | switch (Opcode) { | |||
32568 | // These are non-commutative binops. | |||
32569 | // TODO: Add more X86ISD opcodes once we have test coverage. | |||
32570 | case X86ISD::ANDNP: | |||
32571 | case X86ISD::PCMPGT: | |||
32572 | case X86ISD::FMAX: | |||
32573 | case X86ISD::FMIN: | |||
32574 | case X86ISD::FANDN: | |||
32575 | return true; | |||
32576 | } | |||
32577 | ||||
32578 | return TargetLoweringBase::isBinOp(Opcode); | |||
32579 | } | |||
32580 | ||||
32581 | bool X86TargetLowering::isCommutativeBinOp(unsigned Opcode) const { | |||
32582 | switch (Opcode) { | |||
32583 | // TODO: Add more X86ISD opcodes once we have test coverage. | |||
32584 | case X86ISD::PCMPEQ: | |||
32585 | case X86ISD::PMULDQ: | |||
32586 | case X86ISD::PMULUDQ: | |||
32587 | case X86ISD::FMAXC: | |||
32588 | case X86ISD::FMINC: | |||
32589 | case X86ISD::FAND: | |||
32590 | case X86ISD::FOR: | |||
32591 | case X86ISD::FXOR: | |||
32592 | return true; | |||
32593 | } | |||
32594 | ||||
32595 | return TargetLoweringBase::isCommutativeBinOp(Opcode); | |||
32596 | } | |||
32597 | ||||
32598 | bool X86TargetLowering::isTruncateFree(Type *Ty1, Type *Ty2) const { | |||
32599 | if (!Ty1->isIntegerTy() || !Ty2->isIntegerTy()) | |||
32600 | return false; | |||
32601 | unsigned NumBits1 = Ty1->getPrimitiveSizeInBits(); | |||
32602 | unsigned NumBits2 = Ty2->getPrimitiveSizeInBits(); | |||
32603 | return NumBits1 > NumBits2; | |||
32604 | } | |||
32605 | ||||
32606 | bool X86TargetLowering::allowTruncateForTailCall(Type *Ty1, Type *Ty2) const { | |||
32607 | if (!Ty1->isIntegerTy() || !Ty2->isIntegerTy()) | |||
32608 | return false; | |||
32609 | ||||
32610 | if (!isTypeLegal(EVT::getEVT(Ty1))) | |||
32611 | return false; | |||
32612 | ||||
32613 | assert(Ty1->getPrimitiveSizeInBits() <= 64 && "i128 is probably not a noop")(static_cast <bool> (Ty1->getPrimitiveSizeInBits() <= 64 && "i128 is probably not a noop") ? void (0) : __assert_fail ("Ty1->getPrimitiveSizeInBits() <= 64 && \"i128 is probably not a noop\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 32613, __extension__ __PRETTY_FUNCTION__)); | |||
32614 | ||||
32615 | // Assuming the caller doesn't have a zeroext or signext return parameter, | |||
32616 | // truncation all the way down to i1 is valid. | |||
32617 | return true; | |||
32618 | } | |||
32619 | ||||
32620 | bool X86TargetLowering::isLegalICmpImmediate(int64_t Imm) const { | |||
32621 | return isInt<32>(Imm); | |||
32622 | } | |||
32623 | ||||
32624 | bool X86TargetLowering::isLegalAddImmediate(int64_t Imm) const { | |||
32625 | // Can also use sub to handle negated immediates. | |||
32626 | return isInt<32>(Imm); | |||
32627 | } | |||
32628 | ||||
32629 | bool X86TargetLowering::isLegalStoreImmediate(int64_t Imm) const { | |||
32630 | return isInt<32>(Imm); | |||
32631 | } | |||
32632 | ||||
32633 | bool X86TargetLowering::isTruncateFree(EVT VT1, EVT VT2) const { | |||
32634 | if (!VT1.isScalarInteger() || !VT2.isScalarInteger()) | |||
32635 | return false; | |||
32636 | unsigned NumBits1 = VT1.getSizeInBits(); | |||
32637 | unsigned NumBits2 = VT2.getSizeInBits(); | |||
32638 | return NumBits1 > NumBits2; | |||
32639 | } | |||
32640 | ||||
32641 | bool X86TargetLowering::isZExtFree(Type *Ty1, Type *Ty2) const { | |||
32642 | // x86-64 implicitly zero-extends 32-bit results in 64-bit registers. | |||
32643 | return Ty1->isIntegerTy(32) && Ty2->isIntegerTy(64) && Subtarget.is64Bit(); | |||
32644 | } | |||
32645 | ||||
32646 | bool X86TargetLowering::isZExtFree(EVT VT1, EVT VT2) const { | |||
32647 | // x86-64 implicitly zero-extends 32-bit results in 64-bit registers. | |||
32648 | return VT1 == MVT::i32 && VT2 == MVT::i64 && Subtarget.is64Bit(); | |||
32649 | } | |||
32650 | ||||
32651 | bool X86TargetLowering::isZExtFree(SDValue Val, EVT VT2) const { | |||
32652 | EVT VT1 = Val.getValueType(); | |||
32653 | if (isZExtFree(VT1, VT2)) | |||
32654 | return true; | |||
32655 | ||||
32656 | if (Val.getOpcode() != ISD::LOAD) | |||
32657 | return false; | |||
32658 | ||||
32659 | if (!VT1.isSimple() || !VT1.isInteger() || | |||
32660 | !VT2.isSimple() || !VT2.isInteger()) | |||
32661 | return false; | |||
32662 | ||||
32663 | switch (VT1.getSimpleVT().SimpleTy) { | |||
32664 | default: break; | |||
32665 | case MVT::i8: | |||
32666 | case MVT::i16: | |||
32667 | case MVT::i32: | |||
32668 | // X86 has 8, 16, and 32-bit zero-extending loads. | |||
32669 | return true; | |||
32670 | } | |||
32671 | ||||
32672 | return false; | |||
32673 | } | |||
32674 | ||||
32675 | bool X86TargetLowering::shouldSinkOperands(Instruction *I, | |||
32676 | SmallVectorImpl<Use *> &Ops) const { | |||
32677 | using namespace llvm::PatternMatch; | |||
32678 | ||||
32679 | FixedVectorType *VTy = dyn_cast<FixedVectorType>(I->getType()); | |||
32680 | if (!VTy) | |||
32681 | return false; | |||
32682 | ||||
32683 | if (I->getOpcode() == Instruction::Mul && | |||
32684 | VTy->getElementType()->isIntegerTy(64)) { | |||
32685 | for (auto &Op : I->operands()) { | |||
32686 | // Make sure we are not already sinking this operand | |||
32687 | if (any_of(Ops, [&](Use *U) { return U->get() == Op; })) | |||
32688 | continue; | |||
32689 | ||||
32690 | // Look for PMULDQ pattern where the input is a sext_inreg from vXi32 or | |||
32691 | // the PMULUDQ pattern where the input is a zext_inreg from vXi32. | |||
32692 | if (Subtarget.hasSSE41() && | |||
32693 | match(Op.get(), m_AShr(m_Shl(m_Value(), m_SpecificInt(32)), | |||
32694 | m_SpecificInt(32)))) { | |||
32695 | Ops.push_back(&cast<Instruction>(Op)->getOperandUse(0)); | |||
32696 | Ops.push_back(&Op); | |||
32697 | } else if (Subtarget.hasSSE2() && | |||
32698 | match(Op.get(), | |||
32699 | m_And(m_Value(), m_SpecificInt(UINT64_C(0xffffffff)0xffffffffUL)))) { | |||
32700 | Ops.push_back(&Op); | |||
32701 | } | |||
32702 | } | |||
32703 | ||||
32704 | return !Ops.empty(); | |||
32705 | } | |||
32706 | ||||
32707 | // A uniform shift amount in a vector shift or funnel shift may be much | |||
32708 | // cheaper than a generic variable vector shift, so make that pattern visible | |||
32709 | // to SDAG by sinking the shuffle instruction next to the shift. | |||
32710 | int ShiftAmountOpNum = -1; | |||
32711 | if (I->isShift()) | |||
32712 | ShiftAmountOpNum = 1; | |||
32713 | else if (auto *II = dyn_cast<IntrinsicInst>(I)) { | |||
32714 | if (II->getIntrinsicID() == Intrinsic::fshl || | |||
32715 | II->getIntrinsicID() == Intrinsic::fshr) | |||
32716 | ShiftAmountOpNum = 2; | |||
32717 | } | |||
32718 | ||||
32719 | if (ShiftAmountOpNum == -1) | |||
32720 | return false; | |||
32721 | ||||
32722 | auto *Shuf = dyn_cast<ShuffleVectorInst>(I->getOperand(ShiftAmountOpNum)); | |||
32723 | if (Shuf && getSplatIndex(Shuf->getShuffleMask()) >= 0 && | |||
32724 | isVectorShiftByScalarCheap(I->getType())) { | |||
32725 | Ops.push_back(&I->getOperandUse(ShiftAmountOpNum)); | |||
32726 | return true; | |||
32727 | } | |||
32728 | ||||
32729 | return false; | |||
32730 | } | |||
32731 | ||||
32732 | bool X86TargetLowering::shouldConvertPhiType(Type *From, Type *To) const { | |||
32733 | if (!Subtarget.is64Bit()) | |||
32734 | return false; | |||
32735 | return TargetLowering::shouldConvertPhiType(From, To); | |||
32736 | } | |||
32737 | ||||
32738 | bool X86TargetLowering::isVectorLoadExtDesirable(SDValue ExtVal) const { | |||
32739 | if (isa<MaskedLoadSDNode>(ExtVal.getOperand(0))) | |||
32740 | return false; | |||
32741 | ||||
32742 | EVT SrcVT = ExtVal.getOperand(0).getValueType(); | |||
32743 | ||||
32744 | // There is no extending load for vXi1. | |||
32745 | if (SrcVT.getScalarType() == MVT::i1) | |||
32746 | return false; | |||
32747 | ||||
32748 | return true; | |||
32749 | } | |||
32750 | ||||
32751 | bool X86TargetLowering::isFMAFasterThanFMulAndFAdd(const MachineFunction &MF, | |||
32752 | EVT VT) const { | |||
32753 | if (!Subtarget.hasAnyFMA()) | |||
32754 | return false; | |||
32755 | ||||
32756 | VT = VT.getScalarType(); | |||
32757 | ||||
32758 | if (!VT.isSimple()) | |||
32759 | return false; | |||
32760 | ||||
32761 | switch (VT.getSimpleVT().SimpleTy) { | |||
32762 | case MVT::f16: | |||
32763 | return Subtarget.hasFP16(); | |||
32764 | case MVT::f32: | |||
32765 | case MVT::f64: | |||
32766 | return true; | |||
32767 | default: | |||
32768 | break; | |||
32769 | } | |||
32770 | ||||
32771 | return false; | |||
32772 | } | |||
32773 | ||||
32774 | bool X86TargetLowering::isNarrowingProfitable(EVT VT1, EVT VT2) const { | |||
32775 | // i16 instructions are longer (0x66 prefix) and potentially slower. | |||
32776 | return !(VT1 == MVT::i32 && VT2 == MVT::i16); | |||
32777 | } | |||
32778 | ||||
32779 | /// Targets can use this to indicate that they only support *some* | |||
32780 | /// VECTOR_SHUFFLE operations, those with specific masks. | |||
32781 | /// By default, if a target supports the VECTOR_SHUFFLE node, all mask values | |||
32782 | /// are assumed to be legal. | |||
32783 | bool X86TargetLowering::isShuffleMaskLegal(ArrayRef<int> Mask, EVT VT) const { | |||
32784 | if (!VT.isSimple()) | |||
32785 | return false; | |||
32786 | ||||
32787 | // Not for i1 vectors | |||
32788 | if (VT.getSimpleVT().getScalarType() == MVT::i1) | |||
32789 | return false; | |||
32790 | ||||
32791 | // Very little shuffling can be done for 64-bit vectors right now. | |||
32792 | if (VT.getSimpleVT().getSizeInBits() == 64) | |||
32793 | return false; | |||
32794 | ||||
32795 | // We only care that the types being shuffled are legal. The lowering can | |||
32796 | // handle any possible shuffle mask that results. | |||
32797 | return isTypeLegal(VT.getSimpleVT()); | |||
32798 | } | |||
32799 | ||||
32800 | bool X86TargetLowering::isVectorClearMaskLegal(ArrayRef<int> Mask, | |||
32801 | EVT VT) const { | |||
32802 | // Don't convert an 'and' into a shuffle that we don't directly support. | |||
32803 | // vpblendw and vpshufb for 256-bit vectors are not available on AVX1. | |||
32804 | if (!Subtarget.hasAVX2()) | |||
32805 | if (VT == MVT::v32i8 || VT == MVT::v16i16) | |||
32806 | return false; | |||
32807 | ||||
32808 | // Just delegate to the generic legality, clear masks aren't special. | |||
32809 | return isShuffleMaskLegal(Mask, VT); | |||
32810 | } | |||
32811 | ||||
32812 | bool X86TargetLowering::areJTsAllowed(const Function *Fn) const { | |||
32813 | // If the subtarget is using thunks, we need to not generate jump tables. | |||
32814 | if (Subtarget.useIndirectThunkBranches()) | |||
32815 | return false; | |||
32816 | ||||
32817 | // Otherwise, fallback on the generic logic. | |||
32818 | return TargetLowering::areJTsAllowed(Fn); | |||
32819 | } | |||
32820 | ||||
32821 | //===----------------------------------------------------------------------===// | |||
32822 | // X86 Scheduler Hooks | |||
32823 | //===----------------------------------------------------------------------===// | |||
32824 | ||||
32825 | // Returns true if EFLAG is consumed after this iterator in the rest of the | |||
32826 | // basic block or any successors of the basic block. | |||
32827 | static bool isEFLAGSLiveAfter(MachineBasicBlock::iterator Itr, | |||
32828 | MachineBasicBlock *BB) { | |||
32829 | // Scan forward through BB for a use/def of EFLAGS. | |||
32830 | for (MachineBasicBlock::iterator miI = std::next(Itr), miE = BB->end(); | |||
32831 | miI != miE; ++miI) { | |||
32832 | const MachineInstr& mi = *miI; | |||
32833 | if (mi.readsRegister(X86::EFLAGS)) | |||
32834 | return true; | |||
32835 | // If we found a def, we can stop searching. | |||
32836 | if (mi.definesRegister(X86::EFLAGS)) | |||
32837 | return false; | |||
32838 | } | |||
32839 | ||||
32840 | // If we hit the end of the block, check whether EFLAGS is live into a | |||
32841 | // successor. | |||
32842 | for (MachineBasicBlock::succ_iterator sItr = BB->succ_begin(), | |||
32843 | sEnd = BB->succ_end(); | |||
32844 | sItr != sEnd; ++sItr) { | |||
32845 | MachineBasicBlock* succ = *sItr; | |||
32846 | if (succ->isLiveIn(X86::EFLAGS)) | |||
32847 | return true; | |||
32848 | } | |||
32849 | ||||
32850 | return false; | |||
32851 | } | |||
32852 | ||||
32853 | /// Utility function to emit xbegin specifying the start of an RTM region. | |||
32854 | static MachineBasicBlock *emitXBegin(MachineInstr &MI, MachineBasicBlock *MBB, | |||
32855 | const TargetInstrInfo *TII) { | |||
32856 | const DebugLoc &DL = MI.getDebugLoc(); | |||
32857 | ||||
32858 | const BasicBlock *BB = MBB->getBasicBlock(); | |||
32859 | MachineFunction::iterator I = ++MBB->getIterator(); | |||
32860 | ||||
32861 | // For the v = xbegin(), we generate | |||
32862 | // | |||
32863 | // thisMBB: | |||
32864 | // xbegin sinkMBB | |||
32865 | // | |||
32866 | // mainMBB: | |||
32867 | // s0 = -1 | |||
32868 | // | |||
32869 | // fallBB: | |||
32870 | // eax = # XABORT_DEF | |||
32871 | // s1 = eax | |||
32872 | // | |||
32873 | // sinkMBB: | |||
32874 | // v = phi(s0/mainBB, s1/fallBB) | |||
32875 | ||||
32876 | MachineBasicBlock *thisMBB = MBB; | |||
32877 | MachineFunction *MF = MBB->getParent(); | |||
32878 | MachineBasicBlock *mainMBB = MF->CreateMachineBasicBlock(BB); | |||
32879 | MachineBasicBlock *fallMBB = MF->CreateMachineBasicBlock(BB); | |||
32880 | MachineBasicBlock *sinkMBB = MF->CreateMachineBasicBlock(BB); | |||
32881 | MF->insert(I, mainMBB); | |||
32882 | MF->insert(I, fallMBB); | |||
32883 | MF->insert(I, sinkMBB); | |||
32884 | ||||
32885 | if (isEFLAGSLiveAfter(MI, MBB)) { | |||
32886 | mainMBB->addLiveIn(X86::EFLAGS); | |||
32887 | fallMBB->addLiveIn(X86::EFLAGS); | |||
32888 | sinkMBB->addLiveIn(X86::EFLAGS); | |||
32889 | } | |||
32890 | ||||
32891 | // Transfer the remainder of BB and its successor edges to sinkMBB. | |||
32892 | sinkMBB->splice(sinkMBB->begin(), MBB, | |||
32893 | std::next(MachineBasicBlock::iterator(MI)), MBB->end()); | |||
32894 | sinkMBB->transferSuccessorsAndUpdatePHIs(MBB); | |||
32895 | ||||
32896 | MachineRegisterInfo &MRI = MF->getRegInfo(); | |||
32897 | Register DstReg = MI.getOperand(0).getReg(); | |||
32898 | const TargetRegisterClass *RC = MRI.getRegClass(DstReg); | |||
32899 | Register mainDstReg = MRI.createVirtualRegister(RC); | |||
32900 | Register fallDstReg = MRI.createVirtualRegister(RC); | |||
32901 | ||||
32902 | // thisMBB: | |||
32903 | // xbegin fallMBB | |||
32904 | // # fallthrough to mainMBB | |||
32905 | // # abortion to fallMBB | |||
32906 | BuildMI(thisMBB, DL, TII->get(X86::XBEGIN_4)).addMBB(fallMBB); | |||
32907 | thisMBB->addSuccessor(mainMBB); | |||
32908 | thisMBB->addSuccessor(fallMBB); | |||
32909 | ||||
32910 | // mainMBB: | |||
32911 | // mainDstReg := -1 | |||
32912 | BuildMI(mainMBB, DL, TII->get(X86::MOV32ri), mainDstReg).addImm(-1); | |||
32913 | BuildMI(mainMBB, DL, TII->get(X86::JMP_1)).addMBB(sinkMBB); | |||
32914 | mainMBB->addSuccessor(sinkMBB); | |||
32915 | ||||
32916 | // fallMBB: | |||
32917 | // ; pseudo instruction to model hardware's definition from XABORT | |||
32918 | // EAX := XABORT_DEF | |||
32919 | // fallDstReg := EAX | |||
32920 | BuildMI(fallMBB, DL, TII->get(X86::XABORT_DEF)); | |||
32921 | BuildMI(fallMBB, DL, TII->get(TargetOpcode::COPY), fallDstReg) | |||
32922 | .addReg(X86::EAX); | |||
32923 | fallMBB->addSuccessor(sinkMBB); | |||
32924 | ||||
32925 | // sinkMBB: | |||
32926 | // DstReg := phi(mainDstReg/mainBB, fallDstReg/fallBB) | |||
32927 | BuildMI(*sinkMBB, sinkMBB->begin(), DL, TII->get(X86::PHI), DstReg) | |||
32928 | .addReg(mainDstReg).addMBB(mainMBB) | |||
32929 | .addReg(fallDstReg).addMBB(fallMBB); | |||
32930 | ||||
32931 | MI.eraseFromParent(); | |||
32932 | return sinkMBB; | |||
32933 | } | |||
32934 | ||||
32935 | MachineBasicBlock * | |||
32936 | X86TargetLowering::EmitVAARGWithCustomInserter(MachineInstr &MI, | |||
32937 | MachineBasicBlock *MBB) const { | |||
32938 | // Emit va_arg instruction on X86-64. | |||
32939 | ||||
32940 | // Operands to this pseudo-instruction: | |||
32941 | // 0 ) Output : destination address (reg) | |||
32942 | // 1-5) Input : va_list address (addr, i64mem) | |||
32943 | // 6 ) ArgSize : Size (in bytes) of vararg type | |||
32944 | // 7 ) ArgMode : 0=overflow only, 1=use gp_offset, 2=use fp_offset | |||
32945 | // 8 ) Align : Alignment of type | |||
32946 | // 9 ) EFLAGS (implicit-def) | |||
32947 | ||||
32948 | assert(MI.getNumOperands() == 10 && "VAARG should have 10 operands!")(static_cast <bool> (MI.getNumOperands() == 10 && "VAARG should have 10 operands!") ? void (0) : __assert_fail ("MI.getNumOperands() == 10 && \"VAARG should have 10 operands!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 32948, __extension__ __PRETTY_FUNCTION__)); | |||
32949 | static_assert(X86::AddrNumOperands == 5, "VAARG assumes 5 address operands"); | |||
32950 | ||||
32951 | Register DestReg = MI.getOperand(0).getReg(); | |||
32952 | MachineOperand &Base = MI.getOperand(1); | |||
32953 | MachineOperand &Scale = MI.getOperand(2); | |||
32954 | MachineOperand &Index = MI.getOperand(3); | |||
32955 | MachineOperand &Disp = MI.getOperand(4); | |||
32956 | MachineOperand &Segment = MI.getOperand(5); | |||
32957 | unsigned ArgSize = MI.getOperand(6).getImm(); | |||
32958 | unsigned ArgMode = MI.getOperand(7).getImm(); | |||
32959 | Align Alignment = Align(MI.getOperand(8).getImm()); | |||
32960 | ||||
32961 | MachineFunction *MF = MBB->getParent(); | |||
32962 | ||||
32963 | // Memory Reference | |||
32964 | assert(MI.hasOneMemOperand() && "Expected VAARG to have one memoperand")(static_cast <bool> (MI.hasOneMemOperand() && "Expected VAARG to have one memoperand" ) ? void (0) : __assert_fail ("MI.hasOneMemOperand() && \"Expected VAARG to have one memoperand\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 32964, __extension__ __PRETTY_FUNCTION__)); | |||
32965 | ||||
32966 | MachineMemOperand *OldMMO = MI.memoperands().front(); | |||
32967 | ||||
32968 | // Clone the MMO into two separate MMOs for loading and storing | |||
32969 | MachineMemOperand *LoadOnlyMMO = MF->getMachineMemOperand( | |||
32970 | OldMMO, OldMMO->getFlags() & ~MachineMemOperand::MOStore); | |||
32971 | MachineMemOperand *StoreOnlyMMO = MF->getMachineMemOperand( | |||
32972 | OldMMO, OldMMO->getFlags() & ~MachineMemOperand::MOLoad); | |||
32973 | ||||
32974 | // Machine Information | |||
32975 | const TargetInstrInfo *TII = Subtarget.getInstrInfo(); | |||
32976 | MachineRegisterInfo &MRI = MBB->getParent()->getRegInfo(); | |||
32977 | const TargetRegisterClass *AddrRegClass = | |||
32978 | getRegClassFor(getPointerTy(MBB->getParent()->getDataLayout())); | |||
32979 | const TargetRegisterClass *OffsetRegClass = getRegClassFor(MVT::i32); | |||
32980 | const DebugLoc &DL = MI.getDebugLoc(); | |||
32981 | ||||
32982 | // struct va_list { | |||
32983 | // i32 gp_offset | |||
32984 | // i32 fp_offset | |||
32985 | // i64 overflow_area (address) | |||
32986 | // i64 reg_save_area (address) | |||
32987 | // } | |||
32988 | // sizeof(va_list) = 24 | |||
32989 | // alignment(va_list) = 8 | |||
32990 | ||||
32991 | unsigned TotalNumIntRegs = 6; | |||
32992 | unsigned TotalNumXMMRegs = 8; | |||
32993 | bool UseGPOffset = (ArgMode == 1); | |||
32994 | bool UseFPOffset = (ArgMode == 2); | |||
32995 | unsigned MaxOffset = TotalNumIntRegs * 8 + | |||
32996 | (UseFPOffset ? TotalNumXMMRegs * 16 : 0); | |||
32997 | ||||
32998 | /* Align ArgSize to a multiple of 8 */ | |||
32999 | unsigned ArgSizeA8 = (ArgSize + 7) & ~7; | |||
33000 | bool NeedsAlign = (Alignment > 8); | |||
33001 | ||||
33002 | MachineBasicBlock *thisMBB = MBB; | |||
33003 | MachineBasicBlock *overflowMBB; | |||
33004 | MachineBasicBlock *offsetMBB; | |||
33005 | MachineBasicBlock *endMBB; | |||
33006 | ||||
33007 | unsigned OffsetDestReg = 0; // Argument address computed by offsetMBB | |||
33008 | unsigned OverflowDestReg = 0; // Argument address computed by overflowMBB | |||
33009 | unsigned OffsetReg = 0; | |||
33010 | ||||
33011 | if (!UseGPOffset && !UseFPOffset) { | |||
33012 | // If we only pull from the overflow region, we don't create a branch. | |||
33013 | // We don't need to alter control flow. | |||
33014 | OffsetDestReg = 0; // unused | |||
33015 | OverflowDestReg = DestReg; | |||
33016 | ||||
33017 | offsetMBB = nullptr; | |||
33018 | overflowMBB = thisMBB; | |||
33019 | endMBB = thisMBB; | |||
33020 | } else { | |||
33021 | // First emit code to check if gp_offset (or fp_offset) is below the bound. | |||
33022 | // If so, pull the argument from reg_save_area. (branch to offsetMBB) | |||
33023 | // If not, pull from overflow_area. (branch to overflowMBB) | |||
33024 | // | |||
33025 | // thisMBB | |||
33026 | // | . | |||
33027 | // | . | |||
33028 | // offsetMBB overflowMBB | |||
33029 | // | . | |||
33030 | // | . | |||
33031 | // endMBB | |||
33032 | ||||
33033 | // Registers for the PHI in endMBB | |||
33034 | OffsetDestReg = MRI.createVirtualRegister(AddrRegClass); | |||
33035 | OverflowDestReg = MRI.createVirtualRegister(AddrRegClass); | |||
33036 | ||||
33037 | const BasicBlock *LLVM_BB = MBB->getBasicBlock(); | |||
33038 | overflowMBB = MF->CreateMachineBasicBlock(LLVM_BB); | |||
33039 | offsetMBB = MF->CreateMachineBasicBlock(LLVM_BB); | |||
33040 | endMBB = MF->CreateMachineBasicBlock(LLVM_BB); | |||
33041 | ||||
33042 | MachineFunction::iterator MBBIter = ++MBB->getIterator(); | |||
33043 | ||||
33044 | // Insert the new basic blocks | |||
33045 | MF->insert(MBBIter, offsetMBB); | |||
33046 | MF->insert(MBBIter, overflowMBB); | |||
33047 | MF->insert(MBBIter, endMBB); | |||
33048 | ||||
33049 | // Transfer the remainder of MBB and its successor edges to endMBB. | |||
33050 | endMBB->splice(endMBB->begin(), thisMBB, | |||
33051 | std::next(MachineBasicBlock::iterator(MI)), thisMBB->end()); | |||
33052 | endMBB->transferSuccessorsAndUpdatePHIs(thisMBB); | |||
33053 | ||||
33054 | // Make offsetMBB and overflowMBB successors of thisMBB | |||
33055 | thisMBB->addSuccessor(offsetMBB); | |||
33056 | thisMBB->addSuccessor(overflowMBB); | |||
33057 | ||||
33058 | // endMBB is a successor of both offsetMBB and overflowMBB | |||
33059 | offsetMBB->addSuccessor(endMBB); | |||
33060 | overflowMBB->addSuccessor(endMBB); | |||
33061 | ||||
33062 | // Load the offset value into a register | |||
33063 | OffsetReg = MRI.createVirtualRegister(OffsetRegClass); | |||
33064 | BuildMI(thisMBB, DL, TII->get(X86::MOV32rm), OffsetReg) | |||
33065 | .add(Base) | |||
33066 | .add(Scale) | |||
33067 | .add(Index) | |||
33068 | .addDisp(Disp, UseFPOffset ? 4 : 0) | |||
33069 | .add(Segment) | |||
33070 | .setMemRefs(LoadOnlyMMO); | |||
33071 | ||||
33072 | // Check if there is enough room left to pull this argument. | |||
33073 | BuildMI(thisMBB, DL, TII->get(X86::CMP32ri)) | |||
33074 | .addReg(OffsetReg) | |||
33075 | .addImm(MaxOffset + 8 - ArgSizeA8); | |||
33076 | ||||
33077 | // Branch to "overflowMBB" if offset >= max | |||
33078 | // Fall through to "offsetMBB" otherwise | |||
33079 | BuildMI(thisMBB, DL, TII->get(X86::JCC_1)) | |||
33080 | .addMBB(overflowMBB).addImm(X86::COND_AE); | |||
33081 | } | |||
33082 | ||||
33083 | // In offsetMBB, emit code to use the reg_save_area. | |||
33084 | if (offsetMBB) { | |||
33085 | assert(OffsetReg != 0)(static_cast <bool> (OffsetReg != 0) ? void (0) : __assert_fail ("OffsetReg != 0", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 33085, __extension__ __PRETTY_FUNCTION__)); | |||
33086 | ||||
33087 | // Read the reg_save_area address. | |||
33088 | Register RegSaveReg = MRI.createVirtualRegister(AddrRegClass); | |||
33089 | BuildMI( | |||
33090 | offsetMBB, DL, | |||
33091 | TII->get(Subtarget.isTarget64BitLP64() ? X86::MOV64rm : X86::MOV32rm), | |||
33092 | RegSaveReg) | |||
33093 | .add(Base) | |||
33094 | .add(Scale) | |||
33095 | .add(Index) | |||
33096 | .addDisp(Disp, Subtarget.isTarget64BitLP64() ? 16 : 12) | |||
33097 | .add(Segment) | |||
33098 | .setMemRefs(LoadOnlyMMO); | |||
33099 | ||||
33100 | if (Subtarget.isTarget64BitLP64()) { | |||
33101 | // Zero-extend the offset | |||
33102 | Register OffsetReg64 = MRI.createVirtualRegister(AddrRegClass); | |||
33103 | BuildMI(offsetMBB, DL, TII->get(X86::SUBREG_TO_REG), OffsetReg64) | |||
33104 | .addImm(0) | |||
33105 | .addReg(OffsetReg) | |||
33106 | .addImm(X86::sub_32bit); | |||
33107 | ||||
33108 | // Add the offset to the reg_save_area to get the final address. | |||
33109 | BuildMI(offsetMBB, DL, TII->get(X86::ADD64rr), OffsetDestReg) | |||
33110 | .addReg(OffsetReg64) | |||
33111 | .addReg(RegSaveReg); | |||
33112 | } else { | |||
33113 | // Add the offset to the reg_save_area to get the final address. | |||
33114 | BuildMI(offsetMBB, DL, TII->get(X86::ADD32rr), OffsetDestReg) | |||
33115 | .addReg(OffsetReg) | |||
33116 | .addReg(RegSaveReg); | |||
33117 | } | |||
33118 | ||||
33119 | // Compute the offset for the next argument | |||
33120 | Register NextOffsetReg = MRI.createVirtualRegister(OffsetRegClass); | |||
33121 | BuildMI(offsetMBB, DL, TII->get(X86::ADD32ri), NextOffsetReg) | |||
33122 | .addReg(OffsetReg) | |||
33123 | .addImm(UseFPOffset ? 16 : 8); | |||
33124 | ||||
33125 | // Store it back into the va_list. | |||
33126 | BuildMI(offsetMBB, DL, TII->get(X86::MOV32mr)) | |||
33127 | .add(Base) | |||
33128 | .add(Scale) | |||
33129 | .add(Index) | |||
33130 | .addDisp(Disp, UseFPOffset ? 4 : 0) | |||
33131 | .add(Segment) | |||
33132 | .addReg(NextOffsetReg) | |||
33133 | .setMemRefs(StoreOnlyMMO); | |||
33134 | ||||
33135 | // Jump to endMBB | |||
33136 | BuildMI(offsetMBB, DL, TII->get(X86::JMP_1)) | |||
33137 | .addMBB(endMBB); | |||
33138 | } | |||
33139 | ||||
33140 | // | |||
33141 | // Emit code to use overflow area | |||
33142 | // | |||
33143 | ||||
33144 | // Load the overflow_area address into a register. | |||
33145 | Register OverflowAddrReg = MRI.createVirtualRegister(AddrRegClass); | |||
33146 | BuildMI(overflowMBB, DL, | |||
33147 | TII->get(Subtarget.isTarget64BitLP64() ? X86::MOV64rm : X86::MOV32rm), | |||
33148 | OverflowAddrReg) | |||
33149 | .add(Base) | |||
33150 | .add(Scale) | |||
33151 | .add(Index) | |||
33152 | .addDisp(Disp, 8) | |||
33153 | .add(Segment) | |||
33154 | .setMemRefs(LoadOnlyMMO); | |||
33155 | ||||
33156 | // If we need to align it, do so. Otherwise, just copy the address | |||
33157 | // to OverflowDestReg. | |||
33158 | if (NeedsAlign) { | |||
33159 | // Align the overflow address | |||
33160 | Register TmpReg = MRI.createVirtualRegister(AddrRegClass); | |||
33161 | ||||
33162 | // aligned_addr = (addr + (align-1)) & ~(align-1) | |||
33163 | BuildMI( | |||
33164 | overflowMBB, DL, | |||
33165 | TII->get(Subtarget.isTarget64BitLP64() ? X86::ADD64ri32 : X86::ADD32ri), | |||
33166 | TmpReg) | |||
33167 | .addReg(OverflowAddrReg) | |||
33168 | .addImm(Alignment.value() - 1); | |||
33169 | ||||
33170 | BuildMI( | |||
33171 | overflowMBB, DL, | |||
33172 | TII->get(Subtarget.isTarget64BitLP64() ? X86::AND64ri32 : X86::AND32ri), | |||
33173 | OverflowDestReg) | |||
33174 | .addReg(TmpReg) | |||
33175 | .addImm(~(uint64_t)(Alignment.value() - 1)); | |||
33176 | } else { | |||
33177 | BuildMI(overflowMBB, DL, TII->get(TargetOpcode::COPY), OverflowDestReg) | |||
33178 | .addReg(OverflowAddrReg); | |||
33179 | } | |||
33180 | ||||
33181 | // Compute the next overflow address after this argument. | |||
33182 | // (the overflow address should be kept 8-byte aligned) | |||
33183 | Register NextAddrReg = MRI.createVirtualRegister(AddrRegClass); | |||
33184 | BuildMI( | |||
33185 | overflowMBB, DL, | |||
33186 | TII->get(Subtarget.isTarget64BitLP64() ? X86::ADD64ri32 : X86::ADD32ri), | |||
33187 | NextAddrReg) | |||
33188 | .addReg(OverflowDestReg) | |||
33189 | .addImm(ArgSizeA8); | |||
33190 | ||||
33191 | // Store the new overflow address. | |||
33192 | BuildMI(overflowMBB, DL, | |||
33193 | TII->get(Subtarget.isTarget64BitLP64() ? X86::MOV64mr : X86::MOV32mr)) | |||
33194 | .add(Base) | |||
33195 | .add(Scale) | |||
33196 | .add(Index) | |||
33197 | .addDisp(Disp, 8) | |||
33198 | .add(Segment) | |||
33199 | .addReg(NextAddrReg) | |||
33200 | .setMemRefs(StoreOnlyMMO); | |||
33201 | ||||
33202 | // If we branched, emit the PHI to the front of endMBB. | |||
33203 | if (offsetMBB) { | |||
33204 | BuildMI(*endMBB, endMBB->begin(), DL, | |||
33205 | TII->get(X86::PHI), DestReg) | |||
33206 | .addReg(OffsetDestReg).addMBB(offsetMBB) | |||
33207 | .addReg(OverflowDestReg).addMBB(overflowMBB); | |||
33208 | } | |||
33209 | ||||
33210 | // Erase the pseudo instruction | |||
33211 | MI.eraseFromParent(); | |||
33212 | ||||
33213 | return endMBB; | |||
33214 | } | |||
33215 | ||||
33216 | // The EFLAGS operand of SelectItr might be missing a kill marker | |||
33217 | // because there were multiple uses of EFLAGS, and ISel didn't know | |||
33218 | // which to mark. Figure out whether SelectItr should have had a | |||
33219 | // kill marker, and set it if it should. Returns the correct kill | |||
33220 | // marker value. | |||
33221 | static bool checkAndUpdateEFLAGSKill(MachineBasicBlock::iterator SelectItr, | |||
33222 | MachineBasicBlock* BB, | |||
33223 | const TargetRegisterInfo* TRI) { | |||
33224 | if (isEFLAGSLiveAfter(SelectItr, BB)) | |||
33225 | return false; | |||
33226 | ||||
33227 | // We found a def, or hit the end of the basic block and EFLAGS wasn't live | |||
33228 | // out. SelectMI should have a kill flag on EFLAGS. | |||
33229 | SelectItr->addRegisterKilled(X86::EFLAGS, TRI); | |||
33230 | return true; | |||
33231 | } | |||
33232 | ||||
33233 | // Return true if it is OK for this CMOV pseudo-opcode to be cascaded | |||
33234 | // together with other CMOV pseudo-opcodes into a single basic-block with | |||
33235 | // conditional jump around it. | |||
33236 | static bool isCMOVPseudo(MachineInstr &MI) { | |||
33237 | switch (MI.getOpcode()) { | |||
33238 | case X86::CMOV_FR16X: | |||
33239 | case X86::CMOV_FR32: | |||
33240 | case X86::CMOV_FR32X: | |||
33241 | case X86::CMOV_FR64: | |||
33242 | case X86::CMOV_FR64X: | |||
33243 | case X86::CMOV_GR8: | |||
33244 | case X86::CMOV_GR16: | |||
33245 | case X86::CMOV_GR32: | |||
33246 | case X86::CMOV_RFP32: | |||
33247 | case X86::CMOV_RFP64: | |||
33248 | case X86::CMOV_RFP80: | |||
33249 | case X86::CMOV_VR64: | |||
33250 | case X86::CMOV_VR128: | |||
33251 | case X86::CMOV_VR128X: | |||
33252 | case X86::CMOV_VR256: | |||
33253 | case X86::CMOV_VR256X: | |||
33254 | case X86::CMOV_VR512: | |||
33255 | case X86::CMOV_VK1: | |||
33256 | case X86::CMOV_VK2: | |||
33257 | case X86::CMOV_VK4: | |||
33258 | case X86::CMOV_VK8: | |||
33259 | case X86::CMOV_VK16: | |||
33260 | case X86::CMOV_VK32: | |||
33261 | case X86::CMOV_VK64: | |||
33262 | return true; | |||
33263 | ||||
33264 | default: | |||
33265 | return false; | |||
33266 | } | |||
33267 | } | |||
33268 | ||||
33269 | // Helper function, which inserts PHI functions into SinkMBB: | |||
33270 | // %Result(i) = phi [ %FalseValue(i), FalseMBB ], [ %TrueValue(i), TrueMBB ], | |||
33271 | // where %FalseValue(i) and %TrueValue(i) are taken from the consequent CMOVs | |||
33272 | // in [MIItBegin, MIItEnd) range. It returns the last MachineInstrBuilder for | |||
33273 | // the last PHI function inserted. | |||
33274 | static MachineInstrBuilder createPHIsForCMOVsInSinkBB( | |||
33275 | MachineBasicBlock::iterator MIItBegin, MachineBasicBlock::iterator MIItEnd, | |||
33276 | MachineBasicBlock *TrueMBB, MachineBasicBlock *FalseMBB, | |||
33277 | MachineBasicBlock *SinkMBB) { | |||
33278 | MachineFunction *MF = TrueMBB->getParent(); | |||
33279 | const TargetInstrInfo *TII = MF->getSubtarget().getInstrInfo(); | |||
33280 | const DebugLoc &DL = MIItBegin->getDebugLoc(); | |||
33281 | ||||
33282 | X86::CondCode CC = X86::CondCode(MIItBegin->getOperand(3).getImm()); | |||
33283 | X86::CondCode OppCC = X86::GetOppositeBranchCondition(CC); | |||
33284 | ||||
33285 | MachineBasicBlock::iterator SinkInsertionPoint = SinkMBB->begin(); | |||
33286 | ||||
33287 | // As we are creating the PHIs, we have to be careful if there is more than | |||
33288 | // one. Later CMOVs may reference the results of earlier CMOVs, but later | |||
33289 | // PHIs have to reference the individual true/false inputs from earlier PHIs. | |||
33290 | // That also means that PHI construction must work forward from earlier to | |||
33291 | // later, and that the code must maintain a mapping from earlier PHI's | |||
33292 | // destination registers, and the registers that went into the PHI. | |||
33293 | DenseMap<unsigned, std::pair<unsigned, unsigned>> RegRewriteTable; | |||
33294 | MachineInstrBuilder MIB; | |||
33295 | ||||
33296 | for (MachineBasicBlock::iterator MIIt = MIItBegin; MIIt != MIItEnd; ++MIIt) { | |||
33297 | Register DestReg = MIIt->getOperand(0).getReg(); | |||
33298 | Register Op1Reg = MIIt->getOperand(1).getReg(); | |||
33299 | Register Op2Reg = MIIt->getOperand(2).getReg(); | |||
33300 | ||||
33301 | // If this CMOV we are generating is the opposite condition from | |||
33302 | // the jump we generated, then we have to swap the operands for the | |||
33303 | // PHI that is going to be generated. | |||
33304 | if (MIIt->getOperand(3).getImm() == OppCC) | |||
33305 | std::swap(Op1Reg, Op2Reg); | |||
33306 | ||||
33307 | if (RegRewriteTable.find(Op1Reg) != RegRewriteTable.end()) | |||
33308 | Op1Reg = RegRewriteTable[Op1Reg].first; | |||
33309 | ||||
33310 | if (RegRewriteTable.find(Op2Reg) != RegRewriteTable.end()) | |||
33311 | Op2Reg = RegRewriteTable[Op2Reg].second; | |||
33312 | ||||
33313 | MIB = BuildMI(*SinkMBB, SinkInsertionPoint, DL, TII->get(X86::PHI), DestReg) | |||
33314 | .addReg(Op1Reg) | |||
33315 | .addMBB(FalseMBB) | |||
33316 | .addReg(Op2Reg) | |||
33317 | .addMBB(TrueMBB); | |||
33318 | ||||
33319 | // Add this PHI to the rewrite table. | |||
33320 | RegRewriteTable[DestReg] = std::make_pair(Op1Reg, Op2Reg); | |||
33321 | } | |||
33322 | ||||
33323 | return MIB; | |||
33324 | } | |||
33325 | ||||
33326 | // Lower cascaded selects in form of (SecondCmov (FirstCMOV F, T, cc1), T, cc2). | |||
33327 | MachineBasicBlock * | |||
33328 | X86TargetLowering::EmitLoweredCascadedSelect(MachineInstr &FirstCMOV, | |||
33329 | MachineInstr &SecondCascadedCMOV, | |||
33330 | MachineBasicBlock *ThisMBB) const { | |||
33331 | const TargetInstrInfo *TII = Subtarget.getInstrInfo(); | |||
33332 | const DebugLoc &DL = FirstCMOV.getDebugLoc(); | |||
33333 | ||||
33334 | // We lower cascaded CMOVs such as | |||
33335 | // | |||
33336 | // (SecondCascadedCMOV (FirstCMOV F, T, cc1), T, cc2) | |||
33337 | // | |||
33338 | // to two successive branches. | |||
33339 | // | |||
33340 | // Without this, we would add a PHI between the two jumps, which ends up | |||
33341 | // creating a few copies all around. For instance, for | |||
33342 | // | |||
33343 | // (sitofp (zext (fcmp une))) | |||
33344 | // | |||
33345 | // we would generate: | |||
33346 | // | |||
33347 | // ucomiss %xmm1, %xmm0 | |||
33348 | // movss <1.0f>, %xmm0 | |||
33349 | // movaps %xmm0, %xmm1 | |||
33350 | // jne .LBB5_2 | |||
33351 | // xorps %xmm1, %xmm1 | |||
33352 | // .LBB5_2: | |||
33353 | // jp .LBB5_4 | |||
33354 | // movaps %xmm1, %xmm0 | |||
33355 | // .LBB5_4: | |||
33356 | // retq | |||
33357 | // | |||
33358 | // because this custom-inserter would have generated: | |||
33359 | // | |||
33360 | // A | |||
33361 | // | \ | |||
33362 | // | B | |||
33363 | // | / | |||
33364 | // C | |||
33365 | // | \ | |||
33366 | // | D | |||
33367 | // | / | |||
33368 | // E | |||
33369 | // | |||
33370 | // A: X = ...; Y = ... | |||
33371 | // B: empty | |||
33372 | // C: Z = PHI [X, A], [Y, B] | |||
33373 | // D: empty | |||
33374 | // E: PHI [X, C], [Z, D] | |||
33375 | // | |||
33376 | // If we lower both CMOVs in a single step, we can instead generate: | |||
33377 | // | |||
33378 | // A | |||
33379 | // | \ | |||
33380 | // | C | |||
33381 | // | /| | |||
33382 | // |/ | | |||
33383 | // | | | |||
33384 | // | D | |||
33385 | // | / | |||
33386 | // E | |||
33387 | // | |||
33388 | // A: X = ...; Y = ... | |||
33389 | // D: empty | |||
33390 | // E: PHI [X, A], [X, C], [Y, D] | |||
33391 | // | |||
33392 | // Which, in our sitofp/fcmp example, gives us something like: | |||
33393 | // | |||
33394 | // ucomiss %xmm1, %xmm0 | |||
33395 | // movss <1.0f>, %xmm0 | |||
33396 | // jne .LBB5_4 | |||
33397 | // jp .LBB5_4 | |||
33398 | // xorps %xmm0, %xmm0 | |||
33399 | // .LBB5_4: | |||
33400 | // retq | |||
33401 | // | |||
33402 | ||||
33403 | // We lower cascaded CMOV into two successive branches to the same block. | |||
33404 | // EFLAGS is used by both, so mark it as live in the second. | |||
33405 | const BasicBlock *LLVM_BB = ThisMBB->getBasicBlock(); | |||
33406 | MachineFunction *F = ThisMBB->getParent(); | |||
33407 | MachineBasicBlock *FirstInsertedMBB = F->CreateMachineBasicBlock(LLVM_BB); | |||
33408 | MachineBasicBlock *SecondInsertedMBB = F->CreateMachineBasicBlock(LLVM_BB); | |||
33409 | MachineBasicBlock *SinkMBB = F->CreateMachineBasicBlock(LLVM_BB); | |||
33410 | ||||
33411 | MachineFunction::iterator It = ++ThisMBB->getIterator(); | |||
33412 | F->insert(It, FirstInsertedMBB); | |||
33413 | F->insert(It, SecondInsertedMBB); | |||
33414 | F->insert(It, SinkMBB); | |||
33415 | ||||
33416 | // For a cascaded CMOV, we lower it to two successive branches to | |||
33417 | // the same block (SinkMBB). EFLAGS is used by both, so mark it as live in | |||
33418 | // the FirstInsertedMBB. | |||
33419 | FirstInsertedMBB->addLiveIn(X86::EFLAGS); | |||
33420 | ||||
33421 | // If the EFLAGS register isn't dead in the terminator, then claim that it's | |||
33422 | // live into the sink and copy blocks. | |||
33423 | const TargetRegisterInfo *TRI = Subtarget.getRegisterInfo(); | |||
33424 | if (!SecondCascadedCMOV.killsRegister(X86::EFLAGS) && | |||
33425 | !checkAndUpdateEFLAGSKill(SecondCascadedCMOV, ThisMBB, TRI)) { | |||
33426 | SecondInsertedMBB->addLiveIn(X86::EFLAGS); | |||
33427 | SinkMBB->addLiveIn(X86::EFLAGS); | |||
33428 | } | |||
33429 | ||||
33430 | // Transfer the remainder of ThisMBB and its successor edges to SinkMBB. | |||
33431 | SinkMBB->splice(SinkMBB->begin(), ThisMBB, | |||
33432 | std::next(MachineBasicBlock::iterator(FirstCMOV)), | |||
33433 | ThisMBB->end()); | |||
33434 | SinkMBB->transferSuccessorsAndUpdatePHIs(ThisMBB); | |||
33435 | ||||
33436 | // Fallthrough block for ThisMBB. | |||
33437 | ThisMBB->addSuccessor(FirstInsertedMBB); | |||
33438 | // The true block target of the first branch is always SinkMBB. | |||
33439 | ThisMBB->addSuccessor(SinkMBB); | |||
33440 | // Fallthrough block for FirstInsertedMBB. | |||
33441 | FirstInsertedMBB->addSuccessor(SecondInsertedMBB); | |||
33442 | // The true block for the branch of FirstInsertedMBB. | |||
33443 | FirstInsertedMBB->addSuccessor(SinkMBB); | |||
33444 | // This is fallthrough. | |||
33445 | SecondInsertedMBB->addSuccessor(SinkMBB); | |||
33446 | ||||
33447 | // Create the conditional branch instructions. | |||
33448 | X86::CondCode FirstCC = X86::CondCode(FirstCMOV.getOperand(3).getImm()); | |||
33449 | BuildMI(ThisMBB, DL, TII->get(X86::JCC_1)).addMBB(SinkMBB).addImm(FirstCC); | |||
33450 | ||||
33451 | X86::CondCode SecondCC = | |||
33452 | X86::CondCode(SecondCascadedCMOV.getOperand(3).getImm()); | |||
33453 | BuildMI(FirstInsertedMBB, DL, TII->get(X86::JCC_1)).addMBB(SinkMBB).addImm(SecondCC); | |||
33454 | ||||
33455 | // SinkMBB: | |||
33456 | // %Result = phi [ %FalseValue, SecondInsertedMBB ], [ %TrueValue, ThisMBB ] | |||
33457 | Register DestReg = FirstCMOV.getOperand(0).getReg(); | |||
33458 | Register Op1Reg = FirstCMOV.getOperand(1).getReg(); | |||
33459 | Register Op2Reg = FirstCMOV.getOperand(2).getReg(); | |||
33460 | MachineInstrBuilder MIB = | |||
33461 | BuildMI(*SinkMBB, SinkMBB->begin(), DL, TII->get(X86::PHI), DestReg) | |||
33462 | .addReg(Op1Reg) | |||
33463 | .addMBB(SecondInsertedMBB) | |||
33464 | .addReg(Op2Reg) | |||
33465 | .addMBB(ThisMBB); | |||
33466 | ||||
33467 | // The second SecondInsertedMBB provides the same incoming value as the | |||
33468 | // FirstInsertedMBB (the True operand of the SELECT_CC/CMOV nodes). | |||
33469 | MIB.addReg(FirstCMOV.getOperand(2).getReg()).addMBB(FirstInsertedMBB); | |||
33470 | // Copy the PHI result to the register defined by the second CMOV. | |||
33471 | BuildMI(*SinkMBB, std::next(MachineBasicBlock::iterator(MIB.getInstr())), DL, | |||
33472 | TII->get(TargetOpcode::COPY), | |||
33473 | SecondCascadedCMOV.getOperand(0).getReg()) | |||
33474 | .addReg(FirstCMOV.getOperand(0).getReg()); | |||
33475 | ||||
33476 | // Now remove the CMOVs. | |||
33477 | FirstCMOV.eraseFromParent(); | |||
33478 | SecondCascadedCMOV.eraseFromParent(); | |||
33479 | ||||
33480 | return SinkMBB; | |||
33481 | } | |||
33482 | ||||
33483 | MachineBasicBlock * | |||
33484 | X86TargetLowering::EmitLoweredSelect(MachineInstr &MI, | |||
33485 | MachineBasicBlock *ThisMBB) const { | |||
33486 | const TargetInstrInfo *TII = Subtarget.getInstrInfo(); | |||
33487 | const DebugLoc &DL = MI.getDebugLoc(); | |||
33488 | ||||
33489 | // To "insert" a SELECT_CC instruction, we actually have to insert the | |||
33490 | // diamond control-flow pattern. The incoming instruction knows the | |||
33491 | // destination vreg to set, the condition code register to branch on, the | |||
33492 | // true/false values to select between and a branch opcode to use. | |||
33493 | ||||
33494 | // ThisMBB: | |||
33495 | // ... | |||
33496 | // TrueVal = ... | |||
33497 | // cmpTY ccX, r1, r2 | |||
33498 | // bCC copy1MBB | |||
33499 | // fallthrough --> FalseMBB | |||
33500 | ||||
33501 | // This code lowers all pseudo-CMOV instructions. Generally it lowers these | |||
33502 | // as described above, by inserting a BB, and then making a PHI at the join | |||
33503 | // point to select the true and false operands of the CMOV in the PHI. | |||
33504 | // | |||
33505 | // The code also handles two different cases of multiple CMOV opcodes | |||
33506 | // in a row. | |||
33507 | // | |||
33508 | // Case 1: | |||
33509 | // In this case, there are multiple CMOVs in a row, all which are based on | |||
33510 | // the same condition setting (or the exact opposite condition setting). | |||
33511 | // In this case we can lower all the CMOVs using a single inserted BB, and | |||
33512 | // then make a number of PHIs at the join point to model the CMOVs. The only | |||
33513 | // trickiness here, is that in a case like: | |||
33514 | // | |||
33515 | // t2 = CMOV cond1 t1, f1 | |||
33516 | // t3 = CMOV cond1 t2, f2 | |||
33517 | // | |||
33518 | // when rewriting this into PHIs, we have to perform some renaming on the | |||
33519 | // temps since you cannot have a PHI operand refer to a PHI result earlier | |||
33520 | // in the same block. The "simple" but wrong lowering would be: | |||
33521 | // | |||
33522 | // t2 = PHI t1(BB1), f1(BB2) | |||
33523 | // t3 = PHI t2(BB1), f2(BB2) | |||
33524 | // | |||
33525 | // but clearly t2 is not defined in BB1, so that is incorrect. The proper | |||
33526 | // renaming is to note that on the path through BB1, t2 is really just a | |||
33527 | // copy of t1, and do that renaming, properly generating: | |||
33528 | // | |||
33529 | // t2 = PHI t1(BB1), f1(BB2) | |||
33530 | // t3 = PHI t1(BB1), f2(BB2) | |||
33531 | // | |||
33532 | // Case 2: | |||
33533 | // CMOV ((CMOV F, T, cc1), T, cc2) is checked here and handled by a separate | |||
33534 | // function - EmitLoweredCascadedSelect. | |||
33535 | ||||
33536 | X86::CondCode CC = X86::CondCode(MI.getOperand(3).getImm()); | |||
33537 | X86::CondCode OppCC = X86::GetOppositeBranchCondition(CC); | |||
33538 | MachineInstr *LastCMOV = &MI; | |||
33539 | MachineBasicBlock::iterator NextMIIt = MachineBasicBlock::iterator(MI); | |||
33540 | ||||
33541 | // Check for case 1, where there are multiple CMOVs with the same condition | |||
33542 | // first. Of the two cases of multiple CMOV lowerings, case 1 reduces the | |||
33543 | // number of jumps the most. | |||
33544 | ||||
33545 | if (isCMOVPseudo(MI)) { | |||
33546 | // See if we have a string of CMOVS with the same condition. Skip over | |||
33547 | // intervening debug insts. | |||
33548 | while (NextMIIt != ThisMBB->end() && isCMOVPseudo(*NextMIIt) && | |||
33549 | (NextMIIt->getOperand(3).getImm() == CC || | |||
33550 | NextMIIt->getOperand(3).getImm() == OppCC)) { | |||
33551 | LastCMOV = &*NextMIIt; | |||
33552 | NextMIIt = next_nodbg(NextMIIt, ThisMBB->end()); | |||
33553 | } | |||
33554 | } | |||
33555 | ||||
33556 | // This checks for case 2, but only do this if we didn't already find | |||
33557 | // case 1, as indicated by LastCMOV == MI. | |||
33558 | if (LastCMOV == &MI && NextMIIt != ThisMBB->end() && | |||
33559 | NextMIIt->getOpcode() == MI.getOpcode() && | |||
33560 | NextMIIt->getOperand(2).getReg() == MI.getOperand(2).getReg() && | |||
33561 | NextMIIt->getOperand(1).getReg() == MI.getOperand(0).getReg() && | |||
33562 | NextMIIt->getOperand(1).isKill()) { | |||
33563 | return EmitLoweredCascadedSelect(MI, *NextMIIt, ThisMBB); | |||
33564 | } | |||
33565 | ||||
33566 | const BasicBlock *LLVM_BB = ThisMBB->getBasicBlock(); | |||
33567 | MachineFunction *F = ThisMBB->getParent(); | |||
33568 | MachineBasicBlock *FalseMBB = F->CreateMachineBasicBlock(LLVM_BB); | |||
33569 | MachineBasicBlock *SinkMBB = F->CreateMachineBasicBlock(LLVM_BB); | |||
33570 | ||||
33571 | MachineFunction::iterator It = ++ThisMBB->getIterator(); | |||
33572 | F->insert(It, FalseMBB); | |||
33573 | F->insert(It, SinkMBB); | |||
33574 | ||||
33575 | // If the EFLAGS register isn't dead in the terminator, then claim that it's | |||
33576 | // live into the sink and copy blocks. | |||
33577 | const TargetRegisterInfo *TRI = Subtarget.getRegisterInfo(); | |||
33578 | if (!LastCMOV->killsRegister(X86::EFLAGS) && | |||
33579 | !checkAndUpdateEFLAGSKill(LastCMOV, ThisMBB, TRI)) { | |||
33580 | FalseMBB->addLiveIn(X86::EFLAGS); | |||
33581 | SinkMBB->addLiveIn(X86::EFLAGS); | |||
33582 | } | |||
33583 | ||||
33584 | // Transfer any debug instructions inside the CMOV sequence to the sunk block. | |||
33585 | auto DbgEnd = MachineBasicBlock::iterator(LastCMOV); | |||
33586 | auto DbgIt = MachineBasicBlock::iterator(MI); | |||
33587 | while (DbgIt != DbgEnd) { | |||
33588 | auto Next = std::next(DbgIt); | |||
33589 | if (DbgIt->isDebugInstr()) | |||
33590 | SinkMBB->push_back(DbgIt->removeFromParent()); | |||
33591 | DbgIt = Next; | |||
33592 | } | |||
33593 | ||||
33594 | // Transfer the remainder of ThisMBB and its successor edges to SinkMBB. | |||
33595 | SinkMBB->splice(SinkMBB->end(), ThisMBB, | |||
33596 | std::next(MachineBasicBlock::iterator(LastCMOV)), | |||
33597 | ThisMBB->end()); | |||
33598 | SinkMBB->transferSuccessorsAndUpdatePHIs(ThisMBB); | |||
33599 | ||||
33600 | // Fallthrough block for ThisMBB. | |||
33601 | ThisMBB->addSuccessor(FalseMBB); | |||
33602 | // The true block target of the first (or only) branch is always a SinkMBB. | |||
33603 | ThisMBB->addSuccessor(SinkMBB); | |||
33604 | // Fallthrough block for FalseMBB. | |||
33605 | FalseMBB->addSuccessor(SinkMBB); | |||
33606 | ||||
33607 | // Create the conditional branch instruction. | |||
33608 | BuildMI(ThisMBB, DL, TII->get(X86::JCC_1)).addMBB(SinkMBB).addImm(CC); | |||
33609 | ||||
33610 | // SinkMBB: | |||
33611 | // %Result = phi [ %FalseValue, FalseMBB ], [ %TrueValue, ThisMBB ] | |||
33612 | // ... | |||
33613 | MachineBasicBlock::iterator MIItBegin = MachineBasicBlock::iterator(MI); | |||
33614 | MachineBasicBlock::iterator MIItEnd = | |||
33615 | std::next(MachineBasicBlock::iterator(LastCMOV)); | |||
33616 | createPHIsForCMOVsInSinkBB(MIItBegin, MIItEnd, ThisMBB, FalseMBB, SinkMBB); | |||
33617 | ||||
33618 | // Now remove the CMOV(s). | |||
33619 | ThisMBB->erase(MIItBegin, MIItEnd); | |||
33620 | ||||
33621 | return SinkMBB; | |||
33622 | } | |||
33623 | ||||
33624 | static unsigned getSUBriOpcode(bool IsLP64, int64_t Imm) { | |||
33625 | if (IsLP64) { | |||
33626 | if (isInt<8>(Imm)) | |||
33627 | return X86::SUB64ri8; | |||
33628 | return X86::SUB64ri32; | |||
33629 | } else { | |||
33630 | if (isInt<8>(Imm)) | |||
33631 | return X86::SUB32ri8; | |||
33632 | return X86::SUB32ri; | |||
33633 | } | |||
33634 | } | |||
33635 | ||||
33636 | MachineBasicBlock * | |||
33637 | X86TargetLowering::EmitLoweredProbedAlloca(MachineInstr &MI, | |||
33638 | MachineBasicBlock *MBB) const { | |||
33639 | MachineFunction *MF = MBB->getParent(); | |||
33640 | const TargetInstrInfo *TII = Subtarget.getInstrInfo(); | |||
33641 | const X86FrameLowering &TFI = *Subtarget.getFrameLowering(); | |||
33642 | const DebugLoc &DL = MI.getDebugLoc(); | |||
33643 | const BasicBlock *LLVM_BB = MBB->getBasicBlock(); | |||
33644 | ||||
33645 | const unsigned ProbeSize = getStackProbeSize(*MF); | |||
33646 | ||||
33647 | MachineRegisterInfo &MRI = MF->getRegInfo(); | |||
33648 | MachineBasicBlock *testMBB = MF->CreateMachineBasicBlock(LLVM_BB); | |||
33649 | MachineBasicBlock *tailMBB = MF->CreateMachineBasicBlock(LLVM_BB); | |||
33650 | MachineBasicBlock *blockMBB = MF->CreateMachineBasicBlock(LLVM_BB); | |||
33651 | ||||
33652 | MachineFunction::iterator MBBIter = ++MBB->getIterator(); | |||
33653 | MF->insert(MBBIter, testMBB); | |||
33654 | MF->insert(MBBIter, blockMBB); | |||
33655 | MF->insert(MBBIter, tailMBB); | |||
33656 | ||||
33657 | Register sizeVReg = MI.getOperand(1).getReg(); | |||
33658 | ||||
33659 | Register physSPReg = TFI.Uses64BitFramePtr ? X86::RSP : X86::ESP; | |||
33660 | ||||
33661 | Register TmpStackPtr = MRI.createVirtualRegister( | |||
33662 | TFI.Uses64BitFramePtr ? &X86::GR64RegClass : &X86::GR32RegClass); | |||
33663 | Register FinalStackPtr = MRI.createVirtualRegister( | |||
33664 | TFI.Uses64BitFramePtr ? &X86::GR64RegClass : &X86::GR32RegClass); | |||
33665 | ||||
33666 | BuildMI(*MBB, {MI}, DL, TII->get(TargetOpcode::COPY), TmpStackPtr) | |||
33667 | .addReg(physSPReg); | |||
33668 | { | |||
33669 | const unsigned Opc = TFI.Uses64BitFramePtr ? X86::SUB64rr : X86::SUB32rr; | |||
33670 | BuildMI(*MBB, {MI}, DL, TII->get(Opc), FinalStackPtr) | |||
33671 | .addReg(TmpStackPtr) | |||
33672 | .addReg(sizeVReg); | |||
33673 | } | |||
33674 | ||||
33675 | // test rsp size | |||
33676 | ||||
33677 | BuildMI(testMBB, DL, | |||
33678 | TII->get(TFI.Uses64BitFramePtr ? X86::CMP64rr : X86::CMP32rr)) | |||
33679 | .addReg(FinalStackPtr) | |||
33680 | .addReg(physSPReg); | |||
33681 | ||||
33682 | BuildMI(testMBB, DL, TII->get(X86::JCC_1)) | |||
33683 | .addMBB(tailMBB) | |||
33684 | .addImm(X86::COND_GE); | |||
33685 | testMBB->addSuccessor(blockMBB); | |||
33686 | testMBB->addSuccessor(tailMBB); | |||
33687 | ||||
33688 | // Touch the block then extend it. This is done on the opposite side of | |||
33689 | // static probe where we allocate then touch, to avoid the need of probing the | |||
33690 | // tail of the static alloca. Possible scenarios are: | |||
33691 | // | |||
33692 | // + ---- <- ------------ <- ------------- <- ------------ + | |||
33693 | // | | | |||
33694 | // [free probe] -> [page alloc] -> [alloc probe] -> [tail alloc] + -> [dyn probe] -> [page alloc] -> [dyn probe] -> [tail alloc] + | |||
33695 | // | | | |||
33696 | // + <- ----------- <- ------------ <- ----------- <- ------------ + | |||
33697 | // | |||
33698 | // The property we want to enforce is to never have more than [page alloc] between two probes. | |||
33699 | ||||
33700 | const unsigned XORMIOpc = | |||
33701 | TFI.Uses64BitFramePtr ? X86::XOR64mi8 : X86::XOR32mi8; | |||
33702 | addRegOffset(BuildMI(blockMBB, DL, TII->get(XORMIOpc)), physSPReg, false, 0) | |||
33703 | .addImm(0); | |||
33704 | ||||
33705 | BuildMI(blockMBB, DL, | |||
33706 | TII->get(getSUBriOpcode(TFI.Uses64BitFramePtr, ProbeSize)), physSPReg) | |||
33707 | .addReg(physSPReg) | |||
33708 | .addImm(ProbeSize); | |||
33709 | ||||
33710 | ||||
33711 | BuildMI(blockMBB, DL, TII->get(X86::JMP_1)).addMBB(testMBB); | |||
33712 | blockMBB->addSuccessor(testMBB); | |||
33713 | ||||
33714 | // Replace original instruction by the expected stack ptr | |||
33715 | BuildMI(tailMBB, DL, TII->get(TargetOpcode::COPY), MI.getOperand(0).getReg()) | |||
33716 | .addReg(FinalStackPtr); | |||
33717 | ||||
33718 | tailMBB->splice(tailMBB->end(), MBB, | |||
33719 | std::next(MachineBasicBlock::iterator(MI)), MBB->end()); | |||
33720 | tailMBB->transferSuccessorsAndUpdatePHIs(MBB); | |||
33721 | MBB->addSuccessor(testMBB); | |||
33722 | ||||
33723 | // Delete the original pseudo instruction. | |||
33724 | MI.eraseFromParent(); | |||
33725 | ||||
33726 | // And we're done. | |||
33727 | return tailMBB; | |||
33728 | } | |||
33729 | ||||
33730 | MachineBasicBlock * | |||
33731 | X86TargetLowering::EmitLoweredSegAlloca(MachineInstr &MI, | |||
33732 | MachineBasicBlock *BB) const { | |||
33733 | MachineFunction *MF = BB->getParent(); | |||
33734 | const TargetInstrInfo *TII = Subtarget.getInstrInfo(); | |||
33735 | const DebugLoc &DL = MI.getDebugLoc(); | |||
33736 | const BasicBlock *LLVM_BB = BB->getBasicBlock(); | |||
33737 | ||||
33738 | assert(MF->shouldSplitStack())(static_cast <bool> (MF->shouldSplitStack()) ? void ( 0) : __assert_fail ("MF->shouldSplitStack()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 33738, __extension__ __PRETTY_FUNCTION__)); | |||
33739 | ||||
33740 | const bool Is64Bit = Subtarget.is64Bit(); | |||
33741 | const bool IsLP64 = Subtarget.isTarget64BitLP64(); | |||
33742 | ||||
33743 | const unsigned TlsReg = Is64Bit ? X86::FS : X86::GS; | |||
33744 | const unsigned TlsOffset = IsLP64 ? 0x70 : Is64Bit ? 0x40 : 0x30; | |||
33745 | ||||
33746 | // BB: | |||
33747 | // ... [Till the alloca] | |||
33748 | // If stacklet is not large enough, jump to mallocMBB | |||
33749 | // | |||
33750 | // bumpMBB: | |||
33751 | // Allocate by subtracting from RSP | |||
33752 | // Jump to continueMBB | |||
33753 | // | |||
33754 | // mallocMBB: | |||
33755 | // Allocate by call to runtime | |||
33756 | // | |||
33757 | // continueMBB: | |||
33758 | // ... | |||
33759 | // [rest of original BB] | |||
33760 | // | |||
33761 | ||||
33762 | MachineBasicBlock *mallocMBB = MF->CreateMachineBasicBlock(LLVM_BB); | |||
33763 | MachineBasicBlock *bumpMBB = MF->CreateMachineBasicBlock(LLVM_BB); | |||
33764 | MachineBasicBlock *continueMBB = MF->CreateMachineBasicBlock(LLVM_BB); | |||
33765 | ||||
33766 | MachineRegisterInfo &MRI = MF->getRegInfo(); | |||
33767 | const TargetRegisterClass *AddrRegClass = | |||
33768 | getRegClassFor(getPointerTy(MF->getDataLayout())); | |||
33769 | ||||
33770 | Register mallocPtrVReg = MRI.createVirtualRegister(AddrRegClass), | |||
33771 | bumpSPPtrVReg = MRI.createVirtualRegister(AddrRegClass), | |||
33772 | tmpSPVReg = MRI.createVirtualRegister(AddrRegClass), | |||
33773 | SPLimitVReg = MRI.createVirtualRegister(AddrRegClass), | |||
33774 | sizeVReg = MI.getOperand(1).getReg(), | |||
33775 | physSPReg = | |||
33776 | IsLP64 || Subtarget.isTargetNaCl64() ? X86::RSP : X86::ESP; | |||
33777 | ||||
33778 | MachineFunction::iterator MBBIter = ++BB->getIterator(); | |||
33779 | ||||
33780 | MF->insert(MBBIter, bumpMBB); | |||
33781 | MF->insert(MBBIter, mallocMBB); | |||
33782 | MF->insert(MBBIter, continueMBB); | |||
33783 | ||||
33784 | continueMBB->splice(continueMBB->begin(), BB, | |||
33785 | std::next(MachineBasicBlock::iterator(MI)), BB->end()); | |||
33786 | continueMBB->transferSuccessorsAndUpdatePHIs(BB); | |||
33787 | ||||
33788 | // Add code to the main basic block to check if the stack limit has been hit, | |||
33789 | // and if so, jump to mallocMBB otherwise to bumpMBB. | |||
33790 | BuildMI(BB, DL, TII->get(TargetOpcode::COPY), tmpSPVReg).addReg(physSPReg); | |||
33791 | BuildMI(BB, DL, TII->get(IsLP64 ? X86::SUB64rr:X86::SUB32rr), SPLimitVReg) | |||
33792 | .addReg(tmpSPVReg).addReg(sizeVReg); | |||
33793 | BuildMI(BB, DL, TII->get(IsLP64 ? X86::CMP64mr:X86::CMP32mr)) | |||
33794 | .addReg(0).addImm(1).addReg(0).addImm(TlsOffset).addReg(TlsReg) | |||
33795 | .addReg(SPLimitVReg); | |||
33796 | BuildMI(BB, DL, TII->get(X86::JCC_1)).addMBB(mallocMBB).addImm(X86::COND_G); | |||
33797 | ||||
33798 | // bumpMBB simply decreases the stack pointer, since we know the current | |||
33799 | // stacklet has enough space. | |||
33800 | BuildMI(bumpMBB, DL, TII->get(TargetOpcode::COPY), physSPReg) | |||
33801 | .addReg(SPLimitVReg); | |||
33802 | BuildMI(bumpMBB, DL, TII->get(TargetOpcode::COPY), bumpSPPtrVReg) | |||
33803 | .addReg(SPLimitVReg); | |||
33804 | BuildMI(bumpMBB, DL, TII->get(X86::JMP_1)).addMBB(continueMBB); | |||
33805 | ||||
33806 | // Calls into a routine in libgcc to allocate more space from the heap. | |||
33807 | const uint32_t *RegMask = | |||
33808 | Subtarget.getRegisterInfo()->getCallPreservedMask(*MF, CallingConv::C); | |||
33809 | if (IsLP64) { | |||
33810 | BuildMI(mallocMBB, DL, TII->get(X86::MOV64rr), X86::RDI) | |||
33811 | .addReg(sizeVReg); | |||
33812 | BuildMI(mallocMBB, DL, TII->get(X86::CALL64pcrel32)) | |||
33813 | .addExternalSymbol("__morestack_allocate_stack_space") | |||
33814 | .addRegMask(RegMask) | |||
33815 | .addReg(X86::RDI, RegState::Implicit) | |||
33816 | .addReg(X86::RAX, RegState::ImplicitDefine); | |||
33817 | } else if (Is64Bit) { | |||
33818 | BuildMI(mallocMBB, DL, TII->get(X86::MOV32rr), X86::EDI) | |||
33819 | .addReg(sizeVReg); | |||
33820 | BuildMI(mallocMBB, DL, TII->get(X86::CALL64pcrel32)) | |||
33821 | .addExternalSymbol("__morestack_allocate_stack_space") | |||
33822 | .addRegMask(RegMask) | |||
33823 | .addReg(X86::EDI, RegState::Implicit) | |||
33824 | .addReg(X86::EAX, RegState::ImplicitDefine); | |||
33825 | } else { | |||
33826 | BuildMI(mallocMBB, DL, TII->get(X86::SUB32ri), physSPReg).addReg(physSPReg) | |||
33827 | .addImm(12); | |||
33828 | BuildMI(mallocMBB, DL, TII->get(X86::PUSH32r)).addReg(sizeVReg); | |||
33829 | BuildMI(mallocMBB, DL, TII->get(X86::CALLpcrel32)) | |||
33830 | .addExternalSymbol("__morestack_allocate_stack_space") | |||
33831 | .addRegMask(RegMask) | |||
33832 | .addReg(X86::EAX, RegState::ImplicitDefine); | |||
33833 | } | |||
33834 | ||||
33835 | if (!Is64Bit) | |||
33836 | BuildMI(mallocMBB, DL, TII->get(X86::ADD32ri), physSPReg).addReg(physSPReg) | |||
33837 | .addImm(16); | |||
33838 | ||||
33839 | BuildMI(mallocMBB, DL, TII->get(TargetOpcode::COPY), mallocPtrVReg) | |||
33840 | .addReg(IsLP64 ? X86::RAX : X86::EAX); | |||
33841 | BuildMI(mallocMBB, DL, TII->get(X86::JMP_1)).addMBB(continueMBB); | |||
33842 | ||||
33843 | // Set up the CFG correctly. | |||
33844 | BB->addSuccessor(bumpMBB); | |||
33845 | BB->addSuccessor(mallocMBB); | |||
33846 | mallocMBB->addSuccessor(continueMBB); | |||
33847 | bumpMBB->addSuccessor(continueMBB); | |||
33848 | ||||
33849 | // Take care of the PHI nodes. | |||
33850 | BuildMI(*continueMBB, continueMBB->begin(), DL, TII->get(X86::PHI), | |||
33851 | MI.getOperand(0).getReg()) | |||
33852 | .addReg(mallocPtrVReg) | |||
33853 | .addMBB(mallocMBB) | |||
33854 | .addReg(bumpSPPtrVReg) | |||
33855 | .addMBB(bumpMBB); | |||
33856 | ||||
33857 | // Delete the original pseudo instruction. | |||
33858 | MI.eraseFromParent(); | |||
33859 | ||||
33860 | // And we're done. | |||
33861 | return continueMBB; | |||
33862 | } | |||
33863 | ||||
33864 | MachineBasicBlock * | |||
33865 | X86TargetLowering::EmitLoweredCatchRet(MachineInstr &MI, | |||
33866 | MachineBasicBlock *BB) const { | |||
33867 | MachineFunction *MF = BB->getParent(); | |||
33868 | const TargetInstrInfo &TII = *Subtarget.getInstrInfo(); | |||
33869 | MachineBasicBlock *TargetMBB = MI.getOperand(0).getMBB(); | |||
33870 | const DebugLoc &DL = MI.getDebugLoc(); | |||
33871 | ||||
33872 | assert(!isAsynchronousEHPersonality((static_cast <bool> (!isAsynchronousEHPersonality( classifyEHPersonality (MF->getFunction().getPersonalityFn())) && "SEH does not use catchret!" ) ? void (0) : __assert_fail ("!isAsynchronousEHPersonality( classifyEHPersonality(MF->getFunction().getPersonalityFn())) && \"SEH does not use catchret!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 33874, __extension__ __PRETTY_FUNCTION__)) | |||
33873 | classifyEHPersonality(MF->getFunction().getPersonalityFn())) &&(static_cast <bool> (!isAsynchronousEHPersonality( classifyEHPersonality (MF->getFunction().getPersonalityFn())) && "SEH does not use catchret!" ) ? void (0) : __assert_fail ("!isAsynchronousEHPersonality( classifyEHPersonality(MF->getFunction().getPersonalityFn())) && \"SEH does not use catchret!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 33874, __extension__ __PRETTY_FUNCTION__)) | |||
33874 | "SEH does not use catchret!")(static_cast <bool> (!isAsynchronousEHPersonality( classifyEHPersonality (MF->getFunction().getPersonalityFn())) && "SEH does not use catchret!" ) ? void (0) : __assert_fail ("!isAsynchronousEHPersonality( classifyEHPersonality(MF->getFunction().getPersonalityFn())) && \"SEH does not use catchret!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 33874, __extension__ __PRETTY_FUNCTION__)); | |||
33875 | ||||
33876 | // Only 32-bit EH needs to worry about manually restoring stack pointers. | |||
33877 | if (!Subtarget.is32Bit()) | |||
33878 | return BB; | |||
33879 | ||||
33880 | // C++ EH creates a new target block to hold the restore code, and wires up | |||
33881 | // the new block to the return destination with a normal JMP_4. | |||
33882 | MachineBasicBlock *RestoreMBB = | |||
33883 | MF->CreateMachineBasicBlock(BB->getBasicBlock()); | |||
33884 | assert(BB->succ_size() == 1)(static_cast <bool> (BB->succ_size() == 1) ? void (0 ) : __assert_fail ("BB->succ_size() == 1", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 33884, __extension__ __PRETTY_FUNCTION__)); | |||
33885 | MF->insert(std::next(BB->getIterator()), RestoreMBB); | |||
33886 | RestoreMBB->transferSuccessorsAndUpdatePHIs(BB); | |||
33887 | BB->addSuccessor(RestoreMBB); | |||
33888 | MI.getOperand(0).setMBB(RestoreMBB); | |||
33889 | ||||
33890 | // Marking this as an EH pad but not a funclet entry block causes PEI to | |||
33891 | // restore stack pointers in the block. | |||
33892 | RestoreMBB->setIsEHPad(true); | |||
33893 | ||||
33894 | auto RestoreMBBI = RestoreMBB->begin(); | |||
33895 | BuildMI(*RestoreMBB, RestoreMBBI, DL, TII.get(X86::JMP_4)).addMBB(TargetMBB); | |||
33896 | return BB; | |||
33897 | } | |||
33898 | ||||
33899 | MachineBasicBlock * | |||
33900 | X86TargetLowering::EmitLoweredTLSAddr(MachineInstr &MI, | |||
33901 | MachineBasicBlock *BB) const { | |||
33902 | // So, here we replace TLSADDR with the sequence: | |||
33903 | // adjust_stackdown -> TLSADDR -> adjust_stackup. | |||
33904 | // We need this because TLSADDR is lowered into calls | |||
33905 | // inside MC, therefore without the two markers shrink-wrapping | |||
33906 | // may push the prologue/epilogue pass them. | |||
33907 | const TargetInstrInfo &TII = *Subtarget.getInstrInfo(); | |||
33908 | const DebugLoc &DL = MI.getDebugLoc(); | |||
33909 | MachineFunction &MF = *BB->getParent(); | |||
33910 | ||||
33911 | // Emit CALLSEQ_START right before the instruction. | |||
33912 | unsigned AdjStackDown = TII.getCallFrameSetupOpcode(); | |||
33913 | MachineInstrBuilder CallseqStart = | |||
33914 | BuildMI(MF, DL, TII.get(AdjStackDown)).addImm(0).addImm(0).addImm(0); | |||
33915 | BB->insert(MachineBasicBlock::iterator(MI), CallseqStart); | |||
33916 | ||||
33917 | // Emit CALLSEQ_END right after the instruction. | |||
33918 | // We don't call erase from parent because we want to keep the | |||
33919 | // original instruction around. | |||
33920 | unsigned AdjStackUp = TII.getCallFrameDestroyOpcode(); | |||
33921 | MachineInstrBuilder CallseqEnd = | |||
33922 | BuildMI(MF, DL, TII.get(AdjStackUp)).addImm(0).addImm(0); | |||
33923 | BB->insertAfter(MachineBasicBlock::iterator(MI), CallseqEnd); | |||
33924 | ||||
33925 | return BB; | |||
33926 | } | |||
33927 | ||||
33928 | MachineBasicBlock * | |||
33929 | X86TargetLowering::EmitLoweredTLSCall(MachineInstr &MI, | |||
33930 | MachineBasicBlock *BB) const { | |||
33931 | // This is pretty easy. We're taking the value that we received from | |||
33932 | // our load from the relocation, sticking it in either RDI (x86-64) | |||
33933 | // or EAX and doing an indirect call. The return value will then | |||
33934 | // be in the normal return register. | |||
33935 | MachineFunction *F = BB->getParent(); | |||
33936 | const X86InstrInfo *TII = Subtarget.getInstrInfo(); | |||
33937 | const DebugLoc &DL = MI.getDebugLoc(); | |||
33938 | ||||
33939 | assert(Subtarget.isTargetDarwin() && "Darwin only instr emitted?")(static_cast <bool> (Subtarget.isTargetDarwin() && "Darwin only instr emitted?") ? void (0) : __assert_fail ("Subtarget.isTargetDarwin() && \"Darwin only instr emitted?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 33939, __extension__ __PRETTY_FUNCTION__)); | |||
33940 | assert(MI.getOperand(3).isGlobal() && "This should be a global")(static_cast <bool> (MI.getOperand(3).isGlobal() && "This should be a global") ? void (0) : __assert_fail ("MI.getOperand(3).isGlobal() && \"This should be a global\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 33940, __extension__ __PRETTY_FUNCTION__)); | |||
33941 | ||||
33942 | // Get a register mask for the lowered call. | |||
33943 | // FIXME: The 32-bit calls have non-standard calling conventions. Use a | |||
33944 | // proper register mask. | |||
33945 | const uint32_t *RegMask = | |||
33946 | Subtarget.is64Bit() ? | |||
33947 | Subtarget.getRegisterInfo()->getDarwinTLSCallPreservedMask() : | |||
33948 | Subtarget.getRegisterInfo()->getCallPreservedMask(*F, CallingConv::C); | |||
33949 | if (Subtarget.is64Bit()) { | |||
33950 | MachineInstrBuilder MIB = | |||
33951 | BuildMI(*BB, MI, DL, TII->get(X86::MOV64rm), X86::RDI) | |||
33952 | .addReg(X86::RIP) | |||
33953 | .addImm(0) | |||
33954 | .addReg(0) | |||
33955 | .addGlobalAddress(MI.getOperand(3).getGlobal(), 0, | |||
33956 | MI.getOperand(3).getTargetFlags()) | |||
33957 | .addReg(0); | |||
33958 | MIB = BuildMI(*BB, MI, DL, TII->get(X86::CALL64m)); | |||
33959 | addDirectMem(MIB, X86::RDI); | |||
33960 | MIB.addReg(X86::RAX, RegState::ImplicitDefine).addRegMask(RegMask); | |||
33961 | } else if (!isPositionIndependent()) { | |||
33962 | MachineInstrBuilder MIB = | |||
33963 | BuildMI(*BB, MI, DL, TII->get(X86::MOV32rm), X86::EAX) | |||
33964 | .addReg(0) | |||
33965 | .addImm(0) | |||
33966 | .addReg(0) | |||
33967 | .addGlobalAddress(MI.getOperand(3).getGlobal(), 0, | |||
33968 | MI.getOperand(3).getTargetFlags()) | |||
33969 | .addReg(0); | |||
33970 | MIB = BuildMI(*BB, MI, DL, TII->get(X86::CALL32m)); | |||
33971 | addDirectMem(MIB, X86::EAX); | |||
33972 | MIB.addReg(X86::EAX, RegState::ImplicitDefine).addRegMask(RegMask); | |||
33973 | } else { | |||
33974 | MachineInstrBuilder MIB = | |||
33975 | BuildMI(*BB, MI, DL, TII->get(X86::MOV32rm), X86::EAX) | |||
33976 | .addReg(TII->getGlobalBaseReg(F)) | |||
33977 | .addImm(0) | |||
33978 | .addReg(0) | |||
33979 | .addGlobalAddress(MI.getOperand(3).getGlobal(), 0, | |||
33980 | MI.getOperand(3).getTargetFlags()) | |||
33981 | .addReg(0); | |||
33982 | MIB = BuildMI(*BB, MI, DL, TII->get(X86::CALL32m)); | |||
33983 | addDirectMem(MIB, X86::EAX); | |||
33984 | MIB.addReg(X86::EAX, RegState::ImplicitDefine).addRegMask(RegMask); | |||
33985 | } | |||
33986 | ||||
33987 | MI.eraseFromParent(); // The pseudo instruction is gone now. | |||
33988 | return BB; | |||
33989 | } | |||
33990 | ||||
33991 | static unsigned getOpcodeForIndirectThunk(unsigned RPOpc) { | |||
33992 | switch (RPOpc) { | |||
33993 | case X86::INDIRECT_THUNK_CALL32: | |||
33994 | return X86::CALLpcrel32; | |||
33995 | case X86::INDIRECT_THUNK_CALL64: | |||
33996 | return X86::CALL64pcrel32; | |||
33997 | case X86::INDIRECT_THUNK_TCRETURN32: | |||
33998 | return X86::TCRETURNdi; | |||
33999 | case X86::INDIRECT_THUNK_TCRETURN64: | |||
34000 | return X86::TCRETURNdi64; | |||
34001 | } | |||
34002 | llvm_unreachable("not indirect thunk opcode")::llvm::llvm_unreachable_internal("not indirect thunk opcode" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 34002); | |||
34003 | } | |||
34004 | ||||
34005 | static const char *getIndirectThunkSymbol(const X86Subtarget &Subtarget, | |||
34006 | unsigned Reg) { | |||
34007 | if (Subtarget.useRetpolineExternalThunk()) { | |||
34008 | // When using an external thunk for retpolines, we pick names that match the | |||
34009 | // names GCC happens to use as well. This helps simplify the implementation | |||
34010 | // of the thunks for kernels where they have no easy ability to create | |||
34011 | // aliases and are doing non-trivial configuration of the thunk's body. For | |||
34012 | // example, the Linux kernel will do boot-time hot patching of the thunk | |||
34013 | // bodies and cannot easily export aliases of these to loaded modules. | |||
34014 | // | |||
34015 | // Note that at any point in the future, we may need to change the semantics | |||
34016 | // of how we implement retpolines and at that time will likely change the | |||
34017 | // name of the called thunk. Essentially, there is no hard guarantee that | |||
34018 | // LLVM will generate calls to specific thunks, we merely make a best-effort | |||
34019 | // attempt to help out kernels and other systems where duplicating the | |||
34020 | // thunks is costly. | |||
34021 | switch (Reg) { | |||
34022 | case X86::EAX: | |||
34023 | assert(!Subtarget.is64Bit() && "Should not be using a 32-bit thunk!")(static_cast <bool> (!Subtarget.is64Bit() && "Should not be using a 32-bit thunk!" ) ? void (0) : __assert_fail ("!Subtarget.is64Bit() && \"Should not be using a 32-bit thunk!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 34023, __extension__ __PRETTY_FUNCTION__)); | |||
34024 | return "__x86_indirect_thunk_eax"; | |||
34025 | case X86::ECX: | |||
34026 | assert(!Subtarget.is64Bit() && "Should not be using a 32-bit thunk!")(static_cast <bool> (!Subtarget.is64Bit() && "Should not be using a 32-bit thunk!" ) ? void (0) : __assert_fail ("!Subtarget.is64Bit() && \"Should not be using a 32-bit thunk!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 34026, __extension__ __PRETTY_FUNCTION__)); | |||
34027 | return "__x86_indirect_thunk_ecx"; | |||
34028 | case X86::EDX: | |||
34029 | assert(!Subtarget.is64Bit() && "Should not be using a 32-bit thunk!")(static_cast <bool> (!Subtarget.is64Bit() && "Should not be using a 32-bit thunk!" ) ? void (0) : __assert_fail ("!Subtarget.is64Bit() && \"Should not be using a 32-bit thunk!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 34029, __extension__ __PRETTY_FUNCTION__)); | |||
34030 | return "__x86_indirect_thunk_edx"; | |||
34031 | case X86::EDI: | |||
34032 | assert(!Subtarget.is64Bit() && "Should not be using a 32-bit thunk!")(static_cast <bool> (!Subtarget.is64Bit() && "Should not be using a 32-bit thunk!" ) ? void (0) : __assert_fail ("!Subtarget.is64Bit() && \"Should not be using a 32-bit thunk!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 34032, __extension__ __PRETTY_FUNCTION__)); | |||
34033 | return "__x86_indirect_thunk_edi"; | |||
34034 | case X86::R11: | |||
34035 | assert(Subtarget.is64Bit() && "Should not be using a 64-bit thunk!")(static_cast <bool> (Subtarget.is64Bit() && "Should not be using a 64-bit thunk!" ) ? void (0) : __assert_fail ("Subtarget.is64Bit() && \"Should not be using a 64-bit thunk!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 34035, __extension__ __PRETTY_FUNCTION__)); | |||
34036 | return "__x86_indirect_thunk_r11"; | |||
34037 | } | |||
34038 | llvm_unreachable("unexpected reg for external indirect thunk")::llvm::llvm_unreachable_internal("unexpected reg for external indirect thunk" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 34038); | |||
34039 | } | |||
34040 | ||||
34041 | if (Subtarget.useRetpolineIndirectCalls() || | |||
34042 | Subtarget.useRetpolineIndirectBranches()) { | |||
34043 | // When targeting an internal COMDAT thunk use an LLVM-specific name. | |||
34044 | switch (Reg) { | |||
34045 | case X86::EAX: | |||
34046 | assert(!Subtarget.is64Bit() && "Should not be using a 32-bit thunk!")(static_cast <bool> (!Subtarget.is64Bit() && "Should not be using a 32-bit thunk!" ) ? void (0) : __assert_fail ("!Subtarget.is64Bit() && \"Should not be using a 32-bit thunk!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 34046, __extension__ __PRETTY_FUNCTION__)); | |||
34047 | return "__llvm_retpoline_eax"; | |||
34048 | case X86::ECX: | |||
34049 | assert(!Subtarget.is64Bit() && "Should not be using a 32-bit thunk!")(static_cast <bool> (!Subtarget.is64Bit() && "Should not be using a 32-bit thunk!" ) ? void (0) : __assert_fail ("!Subtarget.is64Bit() && \"Should not be using a 32-bit thunk!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 34049, __extension__ __PRETTY_FUNCTION__)); | |||
34050 | return "__llvm_retpoline_ecx"; | |||
34051 | case X86::EDX: | |||
34052 | assert(!Subtarget.is64Bit() && "Should not be using a 32-bit thunk!")(static_cast <bool> (!Subtarget.is64Bit() && "Should not be using a 32-bit thunk!" ) ? void (0) : __assert_fail ("!Subtarget.is64Bit() && \"Should not be using a 32-bit thunk!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 34052, __extension__ __PRETTY_FUNCTION__)); | |||
34053 | return "__llvm_retpoline_edx"; | |||
34054 | case X86::EDI: | |||
34055 | assert(!Subtarget.is64Bit() && "Should not be using a 32-bit thunk!")(static_cast <bool> (!Subtarget.is64Bit() && "Should not be using a 32-bit thunk!" ) ? void (0) : __assert_fail ("!Subtarget.is64Bit() && \"Should not be using a 32-bit thunk!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 34055, __extension__ __PRETTY_FUNCTION__)); | |||
34056 | return "__llvm_retpoline_edi"; | |||
34057 | case X86::R11: | |||
34058 | assert(Subtarget.is64Bit() && "Should not be using a 64-bit thunk!")(static_cast <bool> (Subtarget.is64Bit() && "Should not be using a 64-bit thunk!" ) ? void (0) : __assert_fail ("Subtarget.is64Bit() && \"Should not be using a 64-bit thunk!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 34058, __extension__ __PRETTY_FUNCTION__)); | |||
34059 | return "__llvm_retpoline_r11"; | |||
34060 | } | |||
34061 | llvm_unreachable("unexpected reg for retpoline")::llvm::llvm_unreachable_internal("unexpected reg for retpoline" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 34061); | |||
34062 | } | |||
34063 | ||||
34064 | if (Subtarget.useLVIControlFlowIntegrity()) { | |||
34065 | assert(Subtarget.is64Bit() && "Should not be using a 64-bit thunk!")(static_cast <bool> (Subtarget.is64Bit() && "Should not be using a 64-bit thunk!" ) ? void (0) : __assert_fail ("Subtarget.is64Bit() && \"Should not be using a 64-bit thunk!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 34065, __extension__ __PRETTY_FUNCTION__)); | |||
34066 | return "__llvm_lvi_thunk_r11"; | |||
34067 | } | |||
34068 | llvm_unreachable("getIndirectThunkSymbol() invoked without thunk feature")::llvm::llvm_unreachable_internal("getIndirectThunkSymbol() invoked without thunk feature" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 34068); | |||
34069 | } | |||
34070 | ||||
34071 | MachineBasicBlock * | |||
34072 | X86TargetLowering::EmitLoweredIndirectThunk(MachineInstr &MI, | |||
34073 | MachineBasicBlock *BB) const { | |||
34074 | // Copy the virtual register into the R11 physical register and | |||
34075 | // call the retpoline thunk. | |||
34076 | const DebugLoc &DL = MI.getDebugLoc(); | |||
34077 | const X86InstrInfo *TII = Subtarget.getInstrInfo(); | |||
34078 | Register CalleeVReg = MI.getOperand(0).getReg(); | |||
34079 | unsigned Opc = getOpcodeForIndirectThunk(MI.getOpcode()); | |||
34080 | ||||
34081 | // Find an available scratch register to hold the callee. On 64-bit, we can | |||
34082 | // just use R11, but we scan for uses anyway to ensure we don't generate | |||
34083 | // incorrect code. On 32-bit, we use one of EAX, ECX, or EDX that isn't | |||
34084 | // already a register use operand to the call to hold the callee. If none | |||
34085 | // are available, use EDI instead. EDI is chosen because EBX is the PIC base | |||
34086 | // register and ESI is the base pointer to realigned stack frames with VLAs. | |||
34087 | SmallVector<unsigned, 3> AvailableRegs; | |||
34088 | if (Subtarget.is64Bit()) | |||
34089 | AvailableRegs.push_back(X86::R11); | |||
34090 | else | |||
34091 | AvailableRegs.append({X86::EAX, X86::ECX, X86::EDX, X86::EDI}); | |||
34092 | ||||
34093 | // Zero out any registers that are already used. | |||
34094 | for (const auto &MO : MI.operands()) { | |||
34095 | if (MO.isReg() && MO.isUse()) | |||
34096 | for (unsigned &Reg : AvailableRegs) | |||
34097 | if (Reg == MO.getReg()) | |||
34098 | Reg = 0; | |||
34099 | } | |||
34100 | ||||
34101 | // Choose the first remaining non-zero available register. | |||
34102 | unsigned AvailableReg = 0; | |||
34103 | for (unsigned MaybeReg : AvailableRegs) { | |||
34104 | if (MaybeReg) { | |||
34105 | AvailableReg = MaybeReg; | |||
34106 | break; | |||
34107 | } | |||
34108 | } | |||
34109 | if (!AvailableReg) | |||
34110 | report_fatal_error("calling convention incompatible with retpoline, no " | |||
34111 | "available registers"); | |||
34112 | ||||
34113 | const char *Symbol = getIndirectThunkSymbol(Subtarget, AvailableReg); | |||
34114 | ||||
34115 | BuildMI(*BB, MI, DL, TII->get(TargetOpcode::COPY), AvailableReg) | |||
34116 | .addReg(CalleeVReg); | |||
34117 | MI.getOperand(0).ChangeToES(Symbol); | |||
34118 | MI.setDesc(TII->get(Opc)); | |||
34119 | MachineInstrBuilder(*BB->getParent(), &MI) | |||
34120 | .addReg(AvailableReg, RegState::Implicit | RegState::Kill); | |||
34121 | return BB; | |||
34122 | } | |||
34123 | ||||
34124 | /// SetJmp implies future control flow change upon calling the corresponding | |||
34125 | /// LongJmp. | |||
34126 | /// Instead of using the 'return' instruction, the long jump fixes the stack and | |||
34127 | /// performs an indirect branch. To do so it uses the registers that were stored | |||
34128 | /// in the jump buffer (when calling SetJmp). | |||
34129 | /// In case the shadow stack is enabled we need to fix it as well, because some | |||
34130 | /// return addresses will be skipped. | |||
34131 | /// The function will save the SSP for future fixing in the function | |||
34132 | /// emitLongJmpShadowStackFix. | |||
34133 | /// \sa emitLongJmpShadowStackFix | |||
34134 | /// \param [in] MI The temporary Machine Instruction for the builtin. | |||
34135 | /// \param [in] MBB The Machine Basic Block that will be modified. | |||
34136 | void X86TargetLowering::emitSetJmpShadowStackFix(MachineInstr &MI, | |||
34137 | MachineBasicBlock *MBB) const { | |||
34138 | const DebugLoc &DL = MI.getDebugLoc(); | |||
34139 | MachineFunction *MF = MBB->getParent(); | |||
34140 | const TargetInstrInfo *TII = Subtarget.getInstrInfo(); | |||
34141 | MachineRegisterInfo &MRI = MF->getRegInfo(); | |||
34142 | MachineInstrBuilder MIB; | |||
34143 | ||||
34144 | // Memory Reference. | |||
34145 | SmallVector<MachineMemOperand *, 2> MMOs(MI.memoperands_begin(), | |||
34146 | MI.memoperands_end()); | |||
34147 | ||||
34148 | // Initialize a register with zero. | |||
34149 | MVT PVT = getPointerTy(MF->getDataLayout()); | |||
34150 | const TargetRegisterClass *PtrRC = getRegClassFor(PVT); | |||
34151 | Register ZReg = MRI.createVirtualRegister(PtrRC); | |||
34152 | unsigned XorRROpc = (PVT == MVT::i64) ? X86::XOR64rr : X86::XOR32rr; | |||
34153 | BuildMI(*MBB, MI, DL, TII->get(XorRROpc)) | |||
34154 | .addDef(ZReg) | |||
34155 | .addReg(ZReg, RegState::Undef) | |||
34156 | .addReg(ZReg, RegState::Undef); | |||
34157 | ||||
34158 | // Read the current SSP Register value to the zeroed register. | |||
34159 | Register SSPCopyReg = MRI.createVirtualRegister(PtrRC); | |||
34160 | unsigned RdsspOpc = (PVT == MVT::i64) ? X86::RDSSPQ : X86::RDSSPD; | |||
34161 | BuildMI(*MBB, MI, DL, TII->get(RdsspOpc), SSPCopyReg).addReg(ZReg); | |||
34162 | ||||
34163 | // Write the SSP register value to offset 3 in input memory buffer. | |||
34164 | unsigned PtrStoreOpc = (PVT == MVT::i64) ? X86::MOV64mr : X86::MOV32mr; | |||
34165 | MIB = BuildMI(*MBB, MI, DL, TII->get(PtrStoreOpc)); | |||
34166 | const int64_t SSPOffset = 3 * PVT.getStoreSize(); | |||
34167 | const unsigned MemOpndSlot = 1; | |||
34168 | for (unsigned i = 0; i < X86::AddrNumOperands; ++i) { | |||
34169 | if (i == X86::AddrDisp) | |||
34170 | MIB.addDisp(MI.getOperand(MemOpndSlot + i), SSPOffset); | |||
34171 | else | |||
34172 | MIB.add(MI.getOperand(MemOpndSlot + i)); | |||
34173 | } | |||
34174 | MIB.addReg(SSPCopyReg); | |||
34175 | MIB.setMemRefs(MMOs); | |||
34176 | } | |||
34177 | ||||
34178 | MachineBasicBlock * | |||
34179 | X86TargetLowering::emitEHSjLjSetJmp(MachineInstr &MI, | |||
34180 | MachineBasicBlock *MBB) const { | |||
34181 | const DebugLoc &DL = MI.getDebugLoc(); | |||
34182 | MachineFunction *MF = MBB->getParent(); | |||
34183 | const TargetInstrInfo *TII = Subtarget.getInstrInfo(); | |||
34184 | const TargetRegisterInfo *TRI = Subtarget.getRegisterInfo(); | |||
34185 | MachineRegisterInfo &MRI = MF->getRegInfo(); | |||
34186 | ||||
34187 | const BasicBlock *BB = MBB->getBasicBlock(); | |||
34188 | MachineFunction::iterator I = ++MBB->getIterator(); | |||
34189 | ||||
34190 | // Memory Reference | |||
34191 | SmallVector<MachineMemOperand *, 2> MMOs(MI.memoperands_begin(), | |||
34192 | MI.memoperands_end()); | |||
34193 | ||||
34194 | unsigned DstReg; | |||
34195 | unsigned MemOpndSlot = 0; | |||
34196 | ||||
34197 | unsigned CurOp = 0; | |||
34198 | ||||
34199 | DstReg = MI.getOperand(CurOp++).getReg(); | |||
34200 | const TargetRegisterClass *RC = MRI.getRegClass(DstReg); | |||
34201 | assert(TRI->isTypeLegalForClass(*RC, MVT::i32) && "Invalid destination!")(static_cast <bool> (TRI->isTypeLegalForClass(*RC, MVT ::i32) && "Invalid destination!") ? void (0) : __assert_fail ("TRI->isTypeLegalForClass(*RC, MVT::i32) && \"Invalid destination!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 34201, __extension__ __PRETTY_FUNCTION__)); | |||
34202 | (void)TRI; | |||
34203 | Register mainDstReg = MRI.createVirtualRegister(RC); | |||
34204 | Register restoreDstReg = MRI.createVirtualRegister(RC); | |||
34205 | ||||
34206 | MemOpndSlot = CurOp; | |||
34207 | ||||
34208 | MVT PVT = getPointerTy(MF->getDataLayout()); | |||
34209 | assert((PVT == MVT::i64 || PVT == MVT::i32) &&(static_cast <bool> ((PVT == MVT::i64 || PVT == MVT::i32 ) && "Invalid Pointer Size!") ? void (0) : __assert_fail ("(PVT == MVT::i64 || PVT == MVT::i32) && \"Invalid Pointer Size!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 34210, __extension__ __PRETTY_FUNCTION__)) | |||
34210 | "Invalid Pointer Size!")(static_cast <bool> ((PVT == MVT::i64 || PVT == MVT::i32 ) && "Invalid Pointer Size!") ? void (0) : __assert_fail ("(PVT == MVT::i64 || PVT == MVT::i32) && \"Invalid Pointer Size!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 34210, __extension__ __PRETTY_FUNCTION__)); | |||
34211 | ||||
34212 | // For v = setjmp(buf), we generate | |||
34213 | // | |||
34214 | // thisMBB: | |||
34215 | // buf[LabelOffset] = restoreMBB <-- takes address of restoreMBB | |||
34216 | // SjLjSetup restoreMBB | |||
34217 | // | |||
34218 | // mainMBB: | |||
34219 | // v_main = 0 | |||
34220 | // | |||
34221 | // sinkMBB: | |||
34222 | // v = phi(main, restore) | |||
34223 | // | |||
34224 | // restoreMBB: | |||
34225 | // if base pointer being used, load it from frame | |||
34226 | // v_restore = 1 | |||
34227 | ||||
34228 | MachineBasicBlock *thisMBB = MBB; | |||
34229 | MachineBasicBlock *mainMBB = MF->CreateMachineBasicBlock(BB); | |||
34230 | MachineBasicBlock *sinkMBB = MF->CreateMachineBasicBlock(BB); | |||
34231 | MachineBasicBlock *restoreMBB = MF->CreateMachineBasicBlock(BB); | |||
34232 | MF->insert(I, mainMBB); | |||
34233 | MF->insert(I, sinkMBB); | |||
34234 | MF->push_back(restoreMBB); | |||
34235 | restoreMBB->setHasAddressTaken(); | |||
34236 | ||||
34237 | MachineInstrBuilder MIB; | |||
34238 | ||||
34239 | // Transfer the remainder of BB and its successor edges to sinkMBB. | |||
34240 | sinkMBB->splice(sinkMBB->begin(), MBB, | |||
34241 | std::next(MachineBasicBlock::iterator(MI)), MBB->end()); | |||
34242 | sinkMBB->transferSuccessorsAndUpdatePHIs(MBB); | |||
34243 | ||||
34244 | // thisMBB: | |||
34245 | unsigned PtrStoreOpc = 0; | |||
34246 | unsigned LabelReg = 0; | |||
34247 | const int64_t LabelOffset = 1 * PVT.getStoreSize(); | |||
34248 | bool UseImmLabel = (MF->getTarget().getCodeModel() == CodeModel::Small) && | |||
34249 | !isPositionIndependent(); | |||
34250 | ||||
34251 | // Prepare IP either in reg or imm. | |||
34252 | if (!UseImmLabel) { | |||
34253 | PtrStoreOpc = (PVT == MVT::i64) ? X86::MOV64mr : X86::MOV32mr; | |||
34254 | const TargetRegisterClass *PtrRC = getRegClassFor(PVT); | |||
34255 | LabelReg = MRI.createVirtualRegister(PtrRC); | |||
34256 | if (Subtarget.is64Bit()) { | |||
34257 | MIB = BuildMI(*thisMBB, MI, DL, TII->get(X86::LEA64r), LabelReg) | |||
34258 | .addReg(X86::RIP) | |||
34259 | .addImm(0) | |||
34260 | .addReg(0) | |||
34261 | .addMBB(restoreMBB) | |||
34262 | .addReg(0); | |||
34263 | } else { | |||
34264 | const X86InstrInfo *XII = static_cast<const X86InstrInfo*>(TII); | |||
34265 | MIB = BuildMI(*thisMBB, MI, DL, TII->get(X86::LEA32r), LabelReg) | |||
34266 | .addReg(XII->getGlobalBaseReg(MF)) | |||
34267 | .addImm(0) | |||
34268 | .addReg(0) | |||
34269 | .addMBB(restoreMBB, Subtarget.classifyBlockAddressReference()) | |||
34270 | .addReg(0); | |||
34271 | } | |||
34272 | } else | |||
34273 | PtrStoreOpc = (PVT == MVT::i64) ? X86::MOV64mi32 : X86::MOV32mi; | |||
34274 | // Store IP | |||
34275 | MIB = BuildMI(*thisMBB, MI, DL, TII->get(PtrStoreOpc)); | |||
34276 | for (unsigned i = 0; i < X86::AddrNumOperands; ++i) { | |||
34277 | if (i == X86::AddrDisp) | |||
34278 | MIB.addDisp(MI.getOperand(MemOpndSlot + i), LabelOffset); | |||
34279 | else | |||
34280 | MIB.add(MI.getOperand(MemOpndSlot + i)); | |||
34281 | } | |||
34282 | if (!UseImmLabel) | |||
34283 | MIB.addReg(LabelReg); | |||
34284 | else | |||
34285 | MIB.addMBB(restoreMBB); | |||
34286 | MIB.setMemRefs(MMOs); | |||
34287 | ||||
34288 | if (MF->getMMI().getModule()->getModuleFlag("cf-protection-return")) { | |||
34289 | emitSetJmpShadowStackFix(MI, thisMBB); | |||
34290 | } | |||
34291 | ||||
34292 | // Setup | |||
34293 | MIB = BuildMI(*thisMBB, MI, DL, TII->get(X86::EH_SjLj_Setup)) | |||
34294 | .addMBB(restoreMBB); | |||
34295 | ||||
34296 | const X86RegisterInfo *RegInfo = Subtarget.getRegisterInfo(); | |||
34297 | MIB.addRegMask(RegInfo->getNoPreservedMask()); | |||
34298 | thisMBB->addSuccessor(mainMBB); | |||
34299 | thisMBB->addSuccessor(restoreMBB); | |||
34300 | ||||
34301 | // mainMBB: | |||
34302 | // EAX = 0 | |||
34303 | BuildMI(mainMBB, DL, TII->get(X86::MOV32r0), mainDstReg); | |||
34304 | mainMBB->addSuccessor(sinkMBB); | |||
34305 | ||||
34306 | // sinkMBB: | |||
34307 | BuildMI(*sinkMBB, sinkMBB->begin(), DL, | |||
34308 | TII->get(X86::PHI), DstReg) | |||
34309 | .addReg(mainDstReg).addMBB(mainMBB) | |||
34310 | .addReg(restoreDstReg).addMBB(restoreMBB); | |||
34311 | ||||
34312 | // restoreMBB: | |||
34313 | if (RegInfo->hasBasePointer(*MF)) { | |||
34314 | const bool Uses64BitFramePtr = | |||
34315 | Subtarget.isTarget64BitLP64() || Subtarget.isTargetNaCl64(); | |||
34316 | X86MachineFunctionInfo *X86FI = MF->getInfo<X86MachineFunctionInfo>(); | |||
34317 | X86FI->setRestoreBasePointer(MF); | |||
34318 | Register FramePtr = RegInfo->getFrameRegister(*MF); | |||
34319 | Register BasePtr = RegInfo->getBaseRegister(); | |||
34320 | unsigned Opm = Uses64BitFramePtr ? X86::MOV64rm : X86::MOV32rm; | |||
34321 | addRegOffset(BuildMI(restoreMBB, DL, TII->get(Opm), BasePtr), | |||
34322 | FramePtr, true, X86FI->getRestoreBasePointerOffset()) | |||
34323 | .setMIFlag(MachineInstr::FrameSetup); | |||
34324 | } | |||
34325 | BuildMI(restoreMBB, DL, TII->get(X86::MOV32ri), restoreDstReg).addImm(1); | |||
34326 | BuildMI(restoreMBB, DL, TII->get(X86::JMP_1)).addMBB(sinkMBB); | |||
34327 | restoreMBB->addSuccessor(sinkMBB); | |||
34328 | ||||
34329 | MI.eraseFromParent(); | |||
34330 | return sinkMBB; | |||
34331 | } | |||
34332 | ||||
34333 | /// Fix the shadow stack using the previously saved SSP pointer. | |||
34334 | /// \sa emitSetJmpShadowStackFix | |||
34335 | /// \param [in] MI The temporary Machine Instruction for the builtin. | |||
34336 | /// \param [in] MBB The Machine Basic Block that will be modified. | |||
34337 | /// \return The sink MBB that will perform the future indirect branch. | |||
34338 | MachineBasicBlock * | |||
34339 | X86TargetLowering::emitLongJmpShadowStackFix(MachineInstr &MI, | |||
34340 | MachineBasicBlock *MBB) const { | |||
34341 | const DebugLoc &DL = MI.getDebugLoc(); | |||
34342 | MachineFunction *MF = MBB->getParent(); | |||
34343 | const TargetInstrInfo *TII = Subtarget.getInstrInfo(); | |||
34344 | MachineRegisterInfo &MRI = MF->getRegInfo(); | |||
34345 | ||||
34346 | // Memory Reference | |||
34347 | SmallVector<MachineMemOperand *, 2> MMOs(MI.memoperands_begin(), | |||
34348 | MI.memoperands_end()); | |||
34349 | ||||
34350 | MVT PVT = getPointerTy(MF->getDataLayout()); | |||
34351 | const TargetRegisterClass *PtrRC = getRegClassFor(PVT); | |||
34352 | ||||
34353 | // checkSspMBB: | |||
34354 | // xor vreg1, vreg1 | |||
34355 | // rdssp vreg1 | |||
34356 | // test vreg1, vreg1 | |||
34357 | // je sinkMBB # Jump if Shadow Stack is not supported | |||
34358 | // fallMBB: | |||
34359 | // mov buf+24/12(%rip), vreg2 | |||
34360 | // sub vreg1, vreg2 | |||
34361 | // jbe sinkMBB # No need to fix the Shadow Stack | |||
34362 | // fixShadowMBB: | |||
34363 | // shr 3/2, vreg2 | |||
34364 | // incssp vreg2 # fix the SSP according to the lower 8 bits | |||
34365 | // shr 8, vreg2 | |||
34366 | // je sinkMBB | |||
34367 | // fixShadowLoopPrepareMBB: | |||
34368 | // shl vreg2 | |||
34369 | // mov 128, vreg3 | |||
34370 | // fixShadowLoopMBB: | |||
34371 | // incssp vreg3 | |||
34372 | // dec vreg2 | |||
34373 | // jne fixShadowLoopMBB # Iterate until you finish fixing | |||
34374 | // # the Shadow Stack | |||
34375 | // sinkMBB: | |||
34376 | ||||
34377 | MachineFunction::iterator I = ++MBB->getIterator(); | |||
34378 | const BasicBlock *BB = MBB->getBasicBlock(); | |||
34379 | ||||
34380 | MachineBasicBlock *checkSspMBB = MF->CreateMachineBasicBlock(BB); | |||
34381 | MachineBasicBlock *fallMBB = MF->CreateMachineBasicBlock(BB); | |||
34382 | MachineBasicBlock *fixShadowMBB = MF->CreateMachineBasicBlock(BB); | |||
34383 | MachineBasicBlock *fixShadowLoopPrepareMBB = MF->CreateMachineBasicBlock(BB); | |||
34384 | MachineBasicBlock *fixShadowLoopMBB = MF->CreateMachineBasicBlock(BB); | |||
34385 | MachineBasicBlock *sinkMBB = MF->CreateMachineBasicBlock(BB); | |||
34386 | MF->insert(I, checkSspMBB); | |||
34387 | MF->insert(I, fallMBB); | |||
34388 | MF->insert(I, fixShadowMBB); | |||
34389 | MF->insert(I, fixShadowLoopPrepareMBB); | |||
34390 | MF->insert(I, fixShadowLoopMBB); | |||
34391 | MF->insert(I, sinkMBB); | |||
34392 | ||||
34393 | // Transfer the remainder of BB and its successor edges to sinkMBB. | |||
34394 | sinkMBB->splice(sinkMBB->begin(), MBB, MachineBasicBlock::iterator(MI), | |||
34395 | MBB->end()); | |||
34396 | sinkMBB->transferSuccessorsAndUpdatePHIs(MBB); | |||
34397 | ||||
34398 | MBB->addSuccessor(checkSspMBB); | |||
34399 | ||||
34400 | // Initialize a register with zero. | |||
34401 | Register ZReg = MRI.createVirtualRegister(&X86::GR32RegClass); | |||
34402 | BuildMI(checkSspMBB, DL, TII->get(X86::MOV32r0), ZReg); | |||
34403 | ||||
34404 | if (PVT == MVT::i64) { | |||
34405 | Register TmpZReg = MRI.createVirtualRegister(PtrRC); | |||
34406 | BuildMI(checkSspMBB, DL, TII->get(X86::SUBREG_TO_REG), TmpZReg) | |||
34407 | .addImm(0) | |||
34408 | .addReg(ZReg) | |||
34409 | .addImm(X86::sub_32bit); | |||
34410 | ZReg = TmpZReg; | |||
34411 | } | |||
34412 | ||||
34413 | // Read the current SSP Register value to the zeroed register. | |||
34414 | Register SSPCopyReg = MRI.createVirtualRegister(PtrRC); | |||
34415 | unsigned RdsspOpc = (PVT == MVT::i64) ? X86::RDSSPQ : X86::RDSSPD; | |||
34416 | BuildMI(checkSspMBB, DL, TII->get(RdsspOpc), SSPCopyReg).addReg(ZReg); | |||
34417 | ||||
34418 | // Check whether the result of the SSP register is zero and jump directly | |||
34419 | // to the sink. | |||
34420 | unsigned TestRROpc = (PVT == MVT::i64) ? X86::TEST64rr : X86::TEST32rr; | |||
34421 | BuildMI(checkSspMBB, DL, TII->get(TestRROpc)) | |||
34422 | .addReg(SSPCopyReg) | |||
34423 | .addReg(SSPCopyReg); | |||
34424 | BuildMI(checkSspMBB, DL, TII->get(X86::JCC_1)).addMBB(sinkMBB).addImm(X86::COND_E); | |||
34425 | checkSspMBB->addSuccessor(sinkMBB); | |||
34426 | checkSspMBB->addSuccessor(fallMBB); | |||
34427 | ||||
34428 | // Reload the previously saved SSP register value. | |||
34429 | Register PrevSSPReg = MRI.createVirtualRegister(PtrRC); | |||
34430 | unsigned PtrLoadOpc = (PVT == MVT::i64) ? X86::MOV64rm : X86::MOV32rm; | |||
34431 | const int64_t SPPOffset = 3 * PVT.getStoreSize(); | |||
34432 | MachineInstrBuilder MIB = | |||
34433 | BuildMI(fallMBB, DL, TII->get(PtrLoadOpc), PrevSSPReg); | |||
34434 | for (unsigned i = 0; i < X86::AddrNumOperands; ++i) { | |||
34435 | const MachineOperand &MO = MI.getOperand(i); | |||
34436 | if (i == X86::AddrDisp) | |||
34437 | MIB.addDisp(MO, SPPOffset); | |||
34438 | else if (MO.isReg()) // Don't add the whole operand, we don't want to | |||
34439 | // preserve kill flags. | |||
34440 | MIB.addReg(MO.getReg()); | |||
34441 | else | |||
34442 | MIB.add(MO); | |||
34443 | } | |||
34444 | MIB.setMemRefs(MMOs); | |||
34445 | ||||
34446 | // Subtract the current SSP from the previous SSP. | |||
34447 | Register SspSubReg = MRI.createVirtualRegister(PtrRC); | |||
34448 | unsigned SubRROpc = (PVT == MVT::i64) ? X86::SUB64rr : X86::SUB32rr; | |||
34449 | BuildMI(fallMBB, DL, TII->get(SubRROpc), SspSubReg) | |||
34450 | .addReg(PrevSSPReg) | |||
34451 | .addReg(SSPCopyReg); | |||
34452 | ||||
34453 | // Jump to sink in case PrevSSPReg <= SSPCopyReg. | |||
34454 | BuildMI(fallMBB, DL, TII->get(X86::JCC_1)).addMBB(sinkMBB).addImm(X86::COND_BE); | |||
34455 | fallMBB->addSuccessor(sinkMBB); | |||
34456 | fallMBB->addSuccessor(fixShadowMBB); | |||
34457 | ||||
34458 | // Shift right by 2/3 for 32/64 because incssp multiplies the argument by 4/8. | |||
34459 | unsigned ShrRIOpc = (PVT == MVT::i64) ? X86::SHR64ri : X86::SHR32ri; | |||
34460 | unsigned Offset = (PVT == MVT::i64) ? 3 : 2; | |||
34461 | Register SspFirstShrReg = MRI.createVirtualRegister(PtrRC); | |||
34462 | BuildMI(fixShadowMBB, DL, TII->get(ShrRIOpc), SspFirstShrReg) | |||
34463 | .addReg(SspSubReg) | |||
34464 | .addImm(Offset); | |||
34465 | ||||
34466 | // Increase SSP when looking only on the lower 8 bits of the delta. | |||
34467 | unsigned IncsspOpc = (PVT == MVT::i64) ? X86::INCSSPQ : X86::INCSSPD; | |||
34468 | BuildMI(fixShadowMBB, DL, TII->get(IncsspOpc)).addReg(SspFirstShrReg); | |||
34469 | ||||
34470 | // Reset the lower 8 bits. | |||
34471 | Register SspSecondShrReg = MRI.createVirtualRegister(PtrRC); | |||
34472 | BuildMI(fixShadowMBB, DL, TII->get(ShrRIOpc), SspSecondShrReg) | |||
34473 | .addReg(SspFirstShrReg) | |||
34474 | .addImm(8); | |||
34475 | ||||
34476 | // Jump if the result of the shift is zero. | |||
34477 | BuildMI(fixShadowMBB, DL, TII->get(X86::JCC_1)).addMBB(sinkMBB).addImm(X86::COND_E); | |||
34478 | fixShadowMBB->addSuccessor(sinkMBB); | |||
34479 | fixShadowMBB->addSuccessor(fixShadowLoopPrepareMBB); | |||
34480 | ||||
34481 | // Do a single shift left. | |||
34482 | unsigned ShlR1Opc = (PVT == MVT::i64) ? X86::SHL64r1 : X86::SHL32r1; | |||
34483 | Register SspAfterShlReg = MRI.createVirtualRegister(PtrRC); | |||
34484 | BuildMI(fixShadowLoopPrepareMBB, DL, TII->get(ShlR1Opc), SspAfterShlReg) | |||
34485 | .addReg(SspSecondShrReg); | |||
34486 | ||||
34487 | // Save the value 128 to a register (will be used next with incssp). | |||
34488 | Register Value128InReg = MRI.createVirtualRegister(PtrRC); | |||
34489 | unsigned MovRIOpc = (PVT == MVT::i64) ? X86::MOV64ri32 : X86::MOV32ri; | |||
34490 | BuildMI(fixShadowLoopPrepareMBB, DL, TII->get(MovRIOpc), Value128InReg) | |||
34491 | .addImm(128); | |||
34492 | fixShadowLoopPrepareMBB->addSuccessor(fixShadowLoopMBB); | |||
34493 | ||||
34494 | // Since incssp only looks at the lower 8 bits, we might need to do several | |||
34495 | // iterations of incssp until we finish fixing the shadow stack. | |||
34496 | Register DecReg = MRI.createVirtualRegister(PtrRC); | |||
34497 | Register CounterReg = MRI.createVirtualRegister(PtrRC); | |||
34498 | BuildMI(fixShadowLoopMBB, DL, TII->get(X86::PHI), CounterReg) | |||
34499 | .addReg(SspAfterShlReg) | |||
34500 | .addMBB(fixShadowLoopPrepareMBB) | |||
34501 | .addReg(DecReg) | |||
34502 | .addMBB(fixShadowLoopMBB); | |||
34503 | ||||
34504 | // Every iteration we increase the SSP by 128. | |||
34505 | BuildMI(fixShadowLoopMBB, DL, TII->get(IncsspOpc)).addReg(Value128InReg); | |||
34506 | ||||
34507 | // Every iteration we decrement the counter by 1. | |||
34508 | unsigned DecROpc = (PVT == MVT::i64) ? X86::DEC64r : X86::DEC32r; | |||
34509 | BuildMI(fixShadowLoopMBB, DL, TII->get(DecROpc), DecReg).addReg(CounterReg); | |||
34510 | ||||
34511 | // Jump if the counter is not zero yet. | |||
34512 | BuildMI(fixShadowLoopMBB, DL, TII->get(X86::JCC_1)).addMBB(fixShadowLoopMBB).addImm(X86::COND_NE); | |||
34513 | fixShadowLoopMBB->addSuccessor(sinkMBB); | |||
34514 | fixShadowLoopMBB->addSuccessor(fixShadowLoopMBB); | |||
34515 | ||||
34516 | return sinkMBB; | |||
34517 | } | |||
34518 | ||||
34519 | MachineBasicBlock * | |||
34520 | X86TargetLowering::emitEHSjLjLongJmp(MachineInstr &MI, | |||
34521 | MachineBasicBlock *MBB) const { | |||
34522 | const DebugLoc &DL = MI.getDebugLoc(); | |||
34523 | MachineFunction *MF = MBB->getParent(); | |||
34524 | const TargetInstrInfo *TII = Subtarget.getInstrInfo(); | |||
34525 | MachineRegisterInfo &MRI = MF->getRegInfo(); | |||
34526 | ||||
34527 | // Memory Reference | |||
34528 | SmallVector<MachineMemOperand *, 2> MMOs(MI.memoperands_begin(), | |||
34529 | MI.memoperands_end()); | |||
34530 | ||||
34531 | MVT PVT = getPointerTy(MF->getDataLayout()); | |||
34532 | assert((PVT == MVT::i64 || PVT == MVT::i32) &&(static_cast <bool> ((PVT == MVT::i64 || PVT == MVT::i32 ) && "Invalid Pointer Size!") ? void (0) : __assert_fail ("(PVT == MVT::i64 || PVT == MVT::i32) && \"Invalid Pointer Size!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 34533, __extension__ __PRETTY_FUNCTION__)) | |||
34533 | "Invalid Pointer Size!")(static_cast <bool> ((PVT == MVT::i64 || PVT == MVT::i32 ) && "Invalid Pointer Size!") ? void (0) : __assert_fail ("(PVT == MVT::i64 || PVT == MVT::i32) && \"Invalid Pointer Size!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 34533, __extension__ __PRETTY_FUNCTION__)); | |||
34534 | ||||
34535 | const TargetRegisterClass *RC = | |||
34536 | (PVT == MVT::i64) ? &X86::GR64RegClass : &X86::GR32RegClass; | |||
34537 | Register Tmp = MRI.createVirtualRegister(RC); | |||
34538 | // Since FP is only updated here but NOT referenced, it's treated as GPR. | |||
34539 | const X86RegisterInfo *RegInfo = Subtarget.getRegisterInfo(); | |||
34540 | Register FP = (PVT == MVT::i64) ? X86::RBP : X86::EBP; | |||
34541 | Register SP = RegInfo->getStackRegister(); | |||
34542 | ||||
34543 | MachineInstrBuilder MIB; | |||
34544 | ||||
34545 | const int64_t LabelOffset = 1 * PVT.getStoreSize(); | |||
34546 | const int64_t SPOffset = 2 * PVT.getStoreSize(); | |||
34547 | ||||
34548 | unsigned PtrLoadOpc = (PVT == MVT::i64) ? X86::MOV64rm : X86::MOV32rm; | |||
34549 | unsigned IJmpOpc = (PVT == MVT::i64) ? X86::JMP64r : X86::JMP32r; | |||
34550 | ||||
34551 | MachineBasicBlock *thisMBB = MBB; | |||
34552 | ||||
34553 | // When CET and shadow stack is enabled, we need to fix the Shadow Stack. | |||
34554 | if (MF->getMMI().getModule()->getModuleFlag("cf-protection-return")) { | |||
34555 | thisMBB = emitLongJmpShadowStackFix(MI, thisMBB); | |||
34556 | } | |||
34557 | ||||
34558 | // Reload FP | |||
34559 | MIB = BuildMI(*thisMBB, MI, DL, TII->get(PtrLoadOpc), FP); | |||
34560 | for (unsigned i = 0; i < X86::AddrNumOperands; ++i) { | |||
34561 | const MachineOperand &MO = MI.getOperand(i); | |||
34562 | if (MO.isReg()) // Don't add the whole operand, we don't want to | |||
34563 | // preserve kill flags. | |||
34564 | MIB.addReg(MO.getReg()); | |||
34565 | else | |||
34566 | MIB.add(MO); | |||
34567 | } | |||
34568 | MIB.setMemRefs(MMOs); | |||
34569 | ||||
34570 | // Reload IP | |||
34571 | MIB = BuildMI(*thisMBB, MI, DL, TII->get(PtrLoadOpc), Tmp); | |||
34572 | for (unsigned i = 0; i < X86::AddrNumOperands; ++i) { | |||
34573 | const MachineOperand &MO = MI.getOperand(i); | |||
34574 | if (i == X86::AddrDisp) | |||
34575 | MIB.addDisp(MO, LabelOffset); | |||
34576 | else if (MO.isReg()) // Don't add the whole operand, we don't want to | |||
34577 | // preserve kill flags. | |||
34578 | MIB.addReg(MO.getReg()); | |||
34579 | else | |||
34580 | MIB.add(MO); | |||
34581 | } | |||
34582 | MIB.setMemRefs(MMOs); | |||
34583 | ||||
34584 | // Reload SP | |||
34585 | MIB = BuildMI(*thisMBB, MI, DL, TII->get(PtrLoadOpc), SP); | |||
34586 | for (unsigned i = 0; i < X86::AddrNumOperands; ++i) { | |||
34587 | if (i == X86::AddrDisp) | |||
34588 | MIB.addDisp(MI.getOperand(i), SPOffset); | |||
34589 | else | |||
34590 | MIB.add(MI.getOperand(i)); // We can preserve the kill flags here, it's | |||
34591 | // the last instruction of the expansion. | |||
34592 | } | |||
34593 | MIB.setMemRefs(MMOs); | |||
34594 | ||||
34595 | // Jump | |||
34596 | BuildMI(*thisMBB, MI, DL, TII->get(IJmpOpc)).addReg(Tmp); | |||
34597 | ||||
34598 | MI.eraseFromParent(); | |||
34599 | return thisMBB; | |||
34600 | } | |||
34601 | ||||
34602 | void X86TargetLowering::SetupEntryBlockForSjLj(MachineInstr &MI, | |||
34603 | MachineBasicBlock *MBB, | |||
34604 | MachineBasicBlock *DispatchBB, | |||
34605 | int FI) const { | |||
34606 | const DebugLoc &DL = MI.getDebugLoc(); | |||
34607 | MachineFunction *MF = MBB->getParent(); | |||
34608 | MachineRegisterInfo *MRI = &MF->getRegInfo(); | |||
34609 | const X86InstrInfo *TII = Subtarget.getInstrInfo(); | |||
34610 | ||||
34611 | MVT PVT = getPointerTy(MF->getDataLayout()); | |||
34612 | assert((PVT == MVT::i64 || PVT == MVT::i32) && "Invalid Pointer Size!")(static_cast <bool> ((PVT == MVT::i64 || PVT == MVT::i32 ) && "Invalid Pointer Size!") ? void (0) : __assert_fail ("(PVT == MVT::i64 || PVT == MVT::i32) && \"Invalid Pointer Size!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 34612, __extension__ __PRETTY_FUNCTION__)); | |||
34613 | ||||
34614 | unsigned Op = 0; | |||
34615 | unsigned VR = 0; | |||
34616 | ||||
34617 | bool UseImmLabel = (MF->getTarget().getCodeModel() == CodeModel::Small) && | |||
34618 | !isPositionIndependent(); | |||
34619 | ||||
34620 | if (UseImmLabel) { | |||
34621 | Op = (PVT == MVT::i64) ? X86::MOV64mi32 : X86::MOV32mi; | |||
34622 | } else { | |||
34623 | const TargetRegisterClass *TRC = | |||
34624 | (PVT == MVT::i64) ? &X86::GR64RegClass : &X86::GR32RegClass; | |||
34625 | VR = MRI->createVirtualRegister(TRC); | |||
34626 | Op = (PVT == MVT::i64) ? X86::MOV64mr : X86::MOV32mr; | |||
34627 | ||||
34628 | if (Subtarget.is64Bit()) | |||
34629 | BuildMI(*MBB, MI, DL, TII->get(X86::LEA64r), VR) | |||
34630 | .addReg(X86::RIP) | |||
34631 | .addImm(1) | |||
34632 | .addReg(0) | |||
34633 | .addMBB(DispatchBB) | |||
34634 | .addReg(0); | |||
34635 | else | |||
34636 | BuildMI(*MBB, MI, DL, TII->get(X86::LEA32r), VR) | |||
34637 | .addReg(0) /* TII->getGlobalBaseReg(MF) */ | |||
34638 | .addImm(1) | |||
34639 | .addReg(0) | |||
34640 | .addMBB(DispatchBB, Subtarget.classifyBlockAddressReference()) | |||
34641 | .addReg(0); | |||
34642 | } | |||
34643 | ||||
34644 | MachineInstrBuilder MIB = BuildMI(*MBB, MI, DL, TII->get(Op)); | |||
34645 | addFrameReference(MIB, FI, Subtarget.is64Bit() ? 56 : 36); | |||
34646 | if (UseImmLabel) | |||
34647 | MIB.addMBB(DispatchBB); | |||
34648 | else | |||
34649 | MIB.addReg(VR); | |||
34650 | } | |||
34651 | ||||
34652 | MachineBasicBlock * | |||
34653 | X86TargetLowering::EmitSjLjDispatchBlock(MachineInstr &MI, | |||
34654 | MachineBasicBlock *BB) const { | |||
34655 | const DebugLoc &DL = MI.getDebugLoc(); | |||
34656 | MachineFunction *MF = BB->getParent(); | |||
34657 | MachineRegisterInfo *MRI = &MF->getRegInfo(); | |||
34658 | const X86InstrInfo *TII = Subtarget.getInstrInfo(); | |||
34659 | int FI = MF->getFrameInfo().getFunctionContextIndex(); | |||
34660 | ||||
34661 | // Get a mapping of the call site numbers to all of the landing pads they're | |||
34662 | // associated with. | |||
34663 | DenseMap<unsigned, SmallVector<MachineBasicBlock *, 2>> CallSiteNumToLPad; | |||
34664 | unsigned MaxCSNum = 0; | |||
34665 | for (auto &MBB : *MF) { | |||
34666 | if (!MBB.isEHPad()) | |||
34667 | continue; | |||
34668 | ||||
34669 | MCSymbol *Sym = nullptr; | |||
34670 | for (const auto &MI : MBB) { | |||
34671 | if (MI.isDebugInstr()) | |||
34672 | continue; | |||
34673 | ||||
34674 | assert(MI.isEHLabel() && "expected EH_LABEL")(static_cast <bool> (MI.isEHLabel() && "expected EH_LABEL" ) ? void (0) : __assert_fail ("MI.isEHLabel() && \"expected EH_LABEL\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 34674, __extension__ __PRETTY_FUNCTION__)); | |||
34675 | Sym = MI.getOperand(0).getMCSymbol(); | |||
34676 | break; | |||
34677 | } | |||
34678 | ||||
34679 | if (!MF->hasCallSiteLandingPad(Sym)) | |||
34680 | continue; | |||
34681 | ||||
34682 | for (unsigned CSI : MF->getCallSiteLandingPad(Sym)) { | |||
34683 | CallSiteNumToLPad[CSI].push_back(&MBB); | |||
34684 | MaxCSNum = std::max(MaxCSNum, CSI); | |||
34685 | } | |||
34686 | } | |||
34687 | ||||
34688 | // Get an ordered list of the machine basic blocks for the jump table. | |||
34689 | std::vector<MachineBasicBlock *> LPadList; | |||
34690 | SmallPtrSet<MachineBasicBlock *, 32> InvokeBBs; | |||
34691 | LPadList.reserve(CallSiteNumToLPad.size()); | |||
34692 | ||||
34693 | for (unsigned CSI = 1; CSI <= MaxCSNum; ++CSI) { | |||
34694 | for (auto &LP : CallSiteNumToLPad[CSI]) { | |||
34695 | LPadList.push_back(LP); | |||
34696 | InvokeBBs.insert(LP->pred_begin(), LP->pred_end()); | |||
34697 | } | |||
34698 | } | |||
34699 | ||||
34700 | assert(!LPadList.empty() &&(static_cast <bool> (!LPadList.empty() && "No landing pad destinations for the dispatch jump table!" ) ? void (0) : __assert_fail ("!LPadList.empty() && \"No landing pad destinations for the dispatch jump table!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 34701, __extension__ __PRETTY_FUNCTION__)) | |||
34701 | "No landing pad destinations for the dispatch jump table!")(static_cast <bool> (!LPadList.empty() && "No landing pad destinations for the dispatch jump table!" ) ? void (0) : __assert_fail ("!LPadList.empty() && \"No landing pad destinations for the dispatch jump table!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 34701, __extension__ __PRETTY_FUNCTION__)); | |||
34702 | ||||
34703 | // Create the MBBs for the dispatch code. | |||
34704 | ||||
34705 | // Shove the dispatch's address into the return slot in the function context. | |||
34706 | MachineBasicBlock *DispatchBB = MF->CreateMachineBasicBlock(); | |||
34707 | DispatchBB->setIsEHPad(true); | |||
34708 | ||||
34709 | MachineBasicBlock *TrapBB = MF->CreateMachineBasicBlock(); | |||
34710 | BuildMI(TrapBB, DL, TII->get(X86::TRAP)); | |||
34711 | DispatchBB->addSuccessor(TrapBB); | |||
34712 | ||||
34713 | MachineBasicBlock *DispContBB = MF->CreateMachineBasicBlock(); | |||
34714 | DispatchBB->addSuccessor(DispContBB); | |||
34715 | ||||
34716 | // Insert MBBs. | |||
34717 | MF->push_back(DispatchBB); | |||
34718 | MF->push_back(DispContBB); | |||
34719 | MF->push_back(TrapBB); | |||
34720 | ||||
34721 | // Insert code into the entry block that creates and registers the function | |||
34722 | // context. | |||
34723 | SetupEntryBlockForSjLj(MI, BB, DispatchBB, FI); | |||
34724 | ||||
34725 | // Create the jump table and associated information | |||
34726 | unsigned JTE = getJumpTableEncoding(); | |||
34727 | MachineJumpTableInfo *JTI = MF->getOrCreateJumpTableInfo(JTE); | |||
34728 | unsigned MJTI = JTI->createJumpTableIndex(LPadList); | |||
34729 | ||||
34730 | const X86RegisterInfo &RI = TII->getRegisterInfo(); | |||
34731 | // Add a register mask with no preserved registers. This results in all | |||
34732 | // registers being marked as clobbered. | |||
34733 | if (RI.hasBasePointer(*MF)) { | |||
34734 | const bool FPIs64Bit = | |||
34735 | Subtarget.isTarget64BitLP64() || Subtarget.isTargetNaCl64(); | |||
34736 | X86MachineFunctionInfo *MFI = MF->getInfo<X86MachineFunctionInfo>(); | |||
34737 | MFI->setRestoreBasePointer(MF); | |||
34738 | ||||
34739 | Register FP = RI.getFrameRegister(*MF); | |||
34740 | Register BP = RI.getBaseRegister(); | |||
34741 | unsigned Op = FPIs64Bit ? X86::MOV64rm : X86::MOV32rm; | |||
34742 | addRegOffset(BuildMI(DispatchBB, DL, TII->get(Op), BP), FP, true, | |||
34743 | MFI->getRestoreBasePointerOffset()) | |||
34744 | .addRegMask(RI.getNoPreservedMask()); | |||
34745 | } else { | |||
34746 | BuildMI(DispatchBB, DL, TII->get(X86::NOOP)) | |||
34747 | .addRegMask(RI.getNoPreservedMask()); | |||
34748 | } | |||
34749 | ||||
34750 | // IReg is used as an index in a memory operand and therefore can't be SP | |||
34751 | Register IReg = MRI->createVirtualRegister(&X86::GR32_NOSPRegClass); | |||
34752 | addFrameReference(BuildMI(DispatchBB, DL, TII->get(X86::MOV32rm), IReg), FI, | |||
34753 | Subtarget.is64Bit() ? 8 : 4); | |||
34754 | BuildMI(DispatchBB, DL, TII->get(X86::CMP32ri)) | |||
34755 | .addReg(IReg) | |||
34756 | .addImm(LPadList.size()); | |||
34757 | BuildMI(DispatchBB, DL, TII->get(X86::JCC_1)).addMBB(TrapBB).addImm(X86::COND_AE); | |||
34758 | ||||
34759 | if (Subtarget.is64Bit()) { | |||
34760 | Register BReg = MRI->createVirtualRegister(&X86::GR64RegClass); | |||
34761 | Register IReg64 = MRI->createVirtualRegister(&X86::GR64_NOSPRegClass); | |||
34762 | ||||
34763 | // leaq .LJTI0_0(%rip), BReg | |||
34764 | BuildMI(DispContBB, DL, TII->get(X86::LEA64r), BReg) | |||
34765 | .addReg(X86::RIP) | |||
34766 | .addImm(1) | |||
34767 | .addReg(0) | |||
34768 | .addJumpTableIndex(MJTI) | |||
34769 | .addReg(0); | |||
34770 | // movzx IReg64, IReg | |||
34771 | BuildMI(DispContBB, DL, TII->get(TargetOpcode::SUBREG_TO_REG), IReg64) | |||
34772 | .addImm(0) | |||
34773 | .addReg(IReg) | |||
34774 | .addImm(X86::sub_32bit); | |||
34775 | ||||
34776 | switch (JTE) { | |||
34777 | case MachineJumpTableInfo::EK_BlockAddress: | |||
34778 | // jmpq *(BReg,IReg64,8) | |||
34779 | BuildMI(DispContBB, DL, TII->get(X86::JMP64m)) | |||
34780 | .addReg(BReg) | |||
34781 | .addImm(8) | |||
34782 | .addReg(IReg64) | |||
34783 | .addImm(0) | |||
34784 | .addReg(0); | |||
34785 | break; | |||
34786 | case MachineJumpTableInfo::EK_LabelDifference32: { | |||
34787 | Register OReg = MRI->createVirtualRegister(&X86::GR32RegClass); | |||
34788 | Register OReg64 = MRI->createVirtualRegister(&X86::GR64RegClass); | |||
34789 | Register TReg = MRI->createVirtualRegister(&X86::GR64RegClass); | |||
34790 | ||||
34791 | // movl (BReg,IReg64,4), OReg | |||
34792 | BuildMI(DispContBB, DL, TII->get(X86::MOV32rm), OReg) | |||
34793 | .addReg(BReg) | |||
34794 | .addImm(4) | |||
34795 | .addReg(IReg64) | |||
34796 | .addImm(0) | |||
34797 | .addReg(0); | |||
34798 | // movsx OReg64, OReg | |||
34799 | BuildMI(DispContBB, DL, TII->get(X86::MOVSX64rr32), OReg64).addReg(OReg); | |||
34800 | // addq BReg, OReg64, TReg | |||
34801 | BuildMI(DispContBB, DL, TII->get(X86::ADD64rr), TReg) | |||
34802 | .addReg(OReg64) | |||
34803 | .addReg(BReg); | |||
34804 | // jmpq *TReg | |||
34805 | BuildMI(DispContBB, DL, TII->get(X86::JMP64r)).addReg(TReg); | |||
34806 | break; | |||
34807 | } | |||
34808 | default: | |||
34809 | llvm_unreachable("Unexpected jump table encoding")::llvm::llvm_unreachable_internal("Unexpected jump table encoding" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 34809); | |||
34810 | } | |||
34811 | } else { | |||
34812 | // jmpl *.LJTI0_0(,IReg,4) | |||
34813 | BuildMI(DispContBB, DL, TII->get(X86::JMP32m)) | |||
34814 | .addReg(0) | |||
34815 | .addImm(4) | |||
34816 | .addReg(IReg) | |||
34817 | .addJumpTableIndex(MJTI) | |||
34818 | .addReg(0); | |||
34819 | } | |||
34820 | ||||
34821 | // Add the jump table entries as successors to the MBB. | |||
34822 | SmallPtrSet<MachineBasicBlock *, 8> SeenMBBs; | |||
34823 | for (auto &LP : LPadList) | |||
34824 | if (SeenMBBs.insert(LP).second) | |||
34825 | DispContBB->addSuccessor(LP); | |||
34826 | ||||
34827 | // N.B. the order the invoke BBs are processed in doesn't matter here. | |||
34828 | SmallVector<MachineBasicBlock *, 64> MBBLPads; | |||
34829 | const MCPhysReg *SavedRegs = MF->getRegInfo().getCalleeSavedRegs(); | |||
34830 | for (MachineBasicBlock *MBB : InvokeBBs) { | |||
34831 | // Remove the landing pad successor from the invoke block and replace it | |||
34832 | // with the new dispatch block. | |||
34833 | // Keep a copy of Successors since it's modified inside the loop. | |||
34834 | SmallVector<MachineBasicBlock *, 8> Successors(MBB->succ_rbegin(), | |||
34835 | MBB->succ_rend()); | |||
34836 | // FIXME: Avoid quadratic complexity. | |||
34837 | for (auto MBBS : Successors) { | |||
34838 | if (MBBS->isEHPad()) { | |||
34839 | MBB->removeSuccessor(MBBS); | |||
34840 | MBBLPads.push_back(MBBS); | |||
34841 | } | |||
34842 | } | |||
34843 | ||||
34844 | MBB->addSuccessor(DispatchBB); | |||
34845 | ||||
34846 | // Find the invoke call and mark all of the callee-saved registers as | |||
34847 | // 'implicit defined' so that they're spilled. This prevents code from | |||
34848 | // moving instructions to before the EH block, where they will never be | |||
34849 | // executed. | |||
34850 | for (auto &II : reverse(*MBB)) { | |||
34851 | if (!II.isCall()) | |||
34852 | continue; | |||
34853 | ||||
34854 | DenseMap<unsigned, bool> DefRegs; | |||
34855 | for (auto &MOp : II.operands()) | |||
34856 | if (MOp.isReg()) | |||
34857 | DefRegs[MOp.getReg()] = true; | |||
34858 | ||||
34859 | MachineInstrBuilder MIB(*MF, &II); | |||
34860 | for (unsigned RegIdx = 0; SavedRegs[RegIdx]; ++RegIdx) { | |||
34861 | unsigned Reg = SavedRegs[RegIdx]; | |||
34862 | if (!DefRegs[Reg]) | |||
34863 | MIB.addReg(Reg, RegState::ImplicitDefine | RegState::Dead); | |||
34864 | } | |||
34865 | ||||
34866 | break; | |||
34867 | } | |||
34868 | } | |||
34869 | ||||
34870 | // Mark all former landing pads as non-landing pads. The dispatch is the only | |||
34871 | // landing pad now. | |||
34872 | for (auto &LP : MBBLPads) | |||
34873 | LP->setIsEHPad(false); | |||
34874 | ||||
34875 | // The instruction is gone now. | |||
34876 | MI.eraseFromParent(); | |||
34877 | return BB; | |||
34878 | } | |||
34879 | ||||
34880 | MachineBasicBlock * | |||
34881 | X86TargetLowering::EmitInstrWithCustomInserter(MachineInstr &MI, | |||
34882 | MachineBasicBlock *BB) const { | |||
34883 | MachineFunction *MF = BB->getParent(); | |||
34884 | const TargetInstrInfo *TII = Subtarget.getInstrInfo(); | |||
34885 | const DebugLoc &DL = MI.getDebugLoc(); | |||
34886 | ||||
34887 | auto TMMImmToTMMReg = [](unsigned Imm) { | |||
34888 | assert (Imm < 8 && "Illegal tmm index")(static_cast <bool> (Imm < 8 && "Illegal tmm index" ) ? void (0) : __assert_fail ("Imm < 8 && \"Illegal tmm index\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 34888, __extension__ __PRETTY_FUNCTION__)); | |||
34889 | return X86::TMM0 + Imm; | |||
34890 | }; | |||
34891 | switch (MI.getOpcode()) { | |||
34892 | default: llvm_unreachable("Unexpected instr type to insert")::llvm::llvm_unreachable_internal("Unexpected instr type to insert" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 34892); | |||
34893 | case X86::TLS_addr32: | |||
34894 | case X86::TLS_addr64: | |||
34895 | case X86::TLS_addrX32: | |||
34896 | case X86::TLS_base_addr32: | |||
34897 | case X86::TLS_base_addr64: | |||
34898 | case X86::TLS_base_addrX32: | |||
34899 | return EmitLoweredTLSAddr(MI, BB); | |||
34900 | case X86::INDIRECT_THUNK_CALL32: | |||
34901 | case X86::INDIRECT_THUNK_CALL64: | |||
34902 | case X86::INDIRECT_THUNK_TCRETURN32: | |||
34903 | case X86::INDIRECT_THUNK_TCRETURN64: | |||
34904 | return EmitLoweredIndirectThunk(MI, BB); | |||
34905 | case X86::CATCHRET: | |||
34906 | return EmitLoweredCatchRet(MI, BB); | |||
34907 | case X86::SEG_ALLOCA_32: | |||
34908 | case X86::SEG_ALLOCA_64: | |||
34909 | return EmitLoweredSegAlloca(MI, BB); | |||
34910 | case X86::PROBED_ALLOCA_32: | |||
34911 | case X86::PROBED_ALLOCA_64: | |||
34912 | return EmitLoweredProbedAlloca(MI, BB); | |||
34913 | case X86::TLSCall_32: | |||
34914 | case X86::TLSCall_64: | |||
34915 | return EmitLoweredTLSCall(MI, BB); | |||
34916 | case X86::CMOV_FR32: | |||
34917 | case X86::CMOV_FR32X: | |||
34918 | case X86::CMOV_FR64: | |||
34919 | case X86::CMOV_FR64X: | |||
34920 | case X86::CMOV_GR8: | |||
34921 | case X86::CMOV_GR16: | |||
34922 | case X86::CMOV_GR32: | |||
34923 | case X86::CMOV_RFP32: | |||
34924 | case X86::CMOV_RFP64: | |||
34925 | case X86::CMOV_RFP80: | |||
34926 | case X86::CMOV_VR64: | |||
34927 | case X86::CMOV_VR128: | |||
34928 | case X86::CMOV_VR128X: | |||
34929 | case X86::CMOV_VR256: | |||
34930 | case X86::CMOV_VR256X: | |||
34931 | case X86::CMOV_VR512: | |||
34932 | case X86::CMOV_VK1: | |||
34933 | case X86::CMOV_VK2: | |||
34934 | case X86::CMOV_VK4: | |||
34935 | case X86::CMOV_VK8: | |||
34936 | case X86::CMOV_VK16: | |||
34937 | case X86::CMOV_VK32: | |||
34938 | case X86::CMOV_VK64: | |||
34939 | return EmitLoweredSelect(MI, BB); | |||
34940 | ||||
34941 | case X86::RDFLAGS32: | |||
34942 | case X86::RDFLAGS64: { | |||
34943 | unsigned PushF = | |||
34944 | MI.getOpcode() == X86::RDFLAGS32 ? X86::PUSHF32 : X86::PUSHF64; | |||
34945 | unsigned Pop = MI.getOpcode() == X86::RDFLAGS32 ? X86::POP32r : X86::POP64r; | |||
34946 | MachineInstr *Push = BuildMI(*BB, MI, DL, TII->get(PushF)); | |||
34947 | // Permit reads of the EFLAGS and DF registers without them being defined. | |||
34948 | // This intrinsic exists to read external processor state in flags, such as | |||
34949 | // the trap flag, interrupt flag, and direction flag, none of which are | |||
34950 | // modeled by the backend. | |||
34951 | assert(Push->getOperand(2).getReg() == X86::EFLAGS &&(static_cast <bool> (Push->getOperand(2).getReg() == X86::EFLAGS && "Unexpected register in operand!") ? void (0) : __assert_fail ("Push->getOperand(2).getReg() == X86::EFLAGS && \"Unexpected register in operand!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 34952, __extension__ __PRETTY_FUNCTION__)) | |||
34952 | "Unexpected register in operand!")(static_cast <bool> (Push->getOperand(2).getReg() == X86::EFLAGS && "Unexpected register in operand!") ? void (0) : __assert_fail ("Push->getOperand(2).getReg() == X86::EFLAGS && \"Unexpected register in operand!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 34952, __extension__ __PRETTY_FUNCTION__)); | |||
34953 | Push->getOperand(2).setIsUndef(); | |||
34954 | assert(Push->getOperand(3).getReg() == X86::DF &&(static_cast <bool> (Push->getOperand(3).getReg() == X86::DF && "Unexpected register in operand!") ? void (0) : __assert_fail ("Push->getOperand(3).getReg() == X86::DF && \"Unexpected register in operand!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 34955, __extension__ __PRETTY_FUNCTION__)) | |||
34955 | "Unexpected register in operand!")(static_cast <bool> (Push->getOperand(3).getReg() == X86::DF && "Unexpected register in operand!") ? void (0) : __assert_fail ("Push->getOperand(3).getReg() == X86::DF && \"Unexpected register in operand!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 34955, __extension__ __PRETTY_FUNCTION__)); | |||
34956 | Push->getOperand(3).setIsUndef(); | |||
34957 | BuildMI(*BB, MI, DL, TII->get(Pop), MI.getOperand(0).getReg()); | |||
34958 | ||||
34959 | MI.eraseFromParent(); // The pseudo is gone now. | |||
34960 | return BB; | |||
34961 | } | |||
34962 | ||||
34963 | case X86::WRFLAGS32: | |||
34964 | case X86::WRFLAGS64: { | |||
34965 | unsigned Push = | |||
34966 | MI.getOpcode() == X86::WRFLAGS32 ? X86::PUSH32r : X86::PUSH64r; | |||
34967 | unsigned PopF = | |||
34968 | MI.getOpcode() == X86::WRFLAGS32 ? X86::POPF32 : X86::POPF64; | |||
34969 | BuildMI(*BB, MI, DL, TII->get(Push)).addReg(MI.getOperand(0).getReg()); | |||
34970 | BuildMI(*BB, MI, DL, TII->get(PopF)); | |||
34971 | ||||
34972 | MI.eraseFromParent(); // The pseudo is gone now. | |||
34973 | return BB; | |||
34974 | } | |||
34975 | ||||
34976 | case X86::FP32_TO_INT16_IN_MEM: | |||
34977 | case X86::FP32_TO_INT32_IN_MEM: | |||
34978 | case X86::FP32_TO_INT64_IN_MEM: | |||
34979 | case X86::FP64_TO_INT16_IN_MEM: | |||
34980 | case X86::FP64_TO_INT32_IN_MEM: | |||
34981 | case X86::FP64_TO_INT64_IN_MEM: | |||
34982 | case X86::FP80_TO_INT16_IN_MEM: | |||
34983 | case X86::FP80_TO_INT32_IN_MEM: | |||
34984 | case X86::FP80_TO_INT64_IN_MEM: { | |||
34985 | // Change the floating point control register to use "round towards zero" | |||
34986 | // mode when truncating to an integer value. | |||
34987 | int OrigCWFrameIdx = | |||
34988 | MF->getFrameInfo().CreateStackObject(2, Align(2), false); | |||
34989 | addFrameReference(BuildMI(*BB, MI, DL, | |||
34990 | TII->get(X86::FNSTCW16m)), OrigCWFrameIdx); | |||
34991 | ||||
34992 | // Load the old value of the control word... | |||
34993 | Register OldCW = MF->getRegInfo().createVirtualRegister(&X86::GR32RegClass); | |||
34994 | addFrameReference(BuildMI(*BB, MI, DL, TII->get(X86::MOVZX32rm16), OldCW), | |||
34995 | OrigCWFrameIdx); | |||
34996 | ||||
34997 | // OR 0b11 into bit 10 and 11. 0b11 is the encoding for round toward zero. | |||
34998 | Register NewCW = MF->getRegInfo().createVirtualRegister(&X86::GR32RegClass); | |||
34999 | BuildMI(*BB, MI, DL, TII->get(X86::OR32ri), NewCW) | |||
35000 | .addReg(OldCW, RegState::Kill).addImm(0xC00); | |||
35001 | ||||
35002 | // Extract to 16 bits. | |||
35003 | Register NewCW16 = | |||
35004 | MF->getRegInfo().createVirtualRegister(&X86::GR16RegClass); | |||
35005 | BuildMI(*BB, MI, DL, TII->get(TargetOpcode::COPY), NewCW16) | |||
35006 | .addReg(NewCW, RegState::Kill, X86::sub_16bit); | |||
35007 | ||||
35008 | // Prepare memory for FLDCW. | |||
35009 | int NewCWFrameIdx = | |||
35010 | MF->getFrameInfo().CreateStackObject(2, Align(2), false); | |||
35011 | addFrameReference(BuildMI(*BB, MI, DL, TII->get(X86::MOV16mr)), | |||
35012 | NewCWFrameIdx) | |||
35013 | .addReg(NewCW16, RegState::Kill); | |||
35014 | ||||
35015 | // Reload the modified control word now... | |||
35016 | addFrameReference(BuildMI(*BB, MI, DL, | |||
35017 | TII->get(X86::FLDCW16m)), NewCWFrameIdx); | |||
35018 | ||||
35019 | // Get the X86 opcode to use. | |||
35020 | unsigned Opc; | |||
35021 | switch (MI.getOpcode()) { | |||
35022 | default: llvm_unreachable("illegal opcode!")::llvm::llvm_unreachable_internal("illegal opcode!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 35022); | |||
35023 | case X86::FP32_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m32; break; | |||
35024 | case X86::FP32_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m32; break; | |||
35025 | case X86::FP32_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m32; break; | |||
35026 | case X86::FP64_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m64; break; | |||
35027 | case X86::FP64_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m64; break; | |||
35028 | case X86::FP64_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m64; break; | |||
35029 | case X86::FP80_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m80; break; | |||
35030 | case X86::FP80_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m80; break; | |||
35031 | case X86::FP80_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m80; break; | |||
35032 | } | |||
35033 | ||||
35034 | X86AddressMode AM = getAddressFromInstr(&MI, 0); | |||
35035 | addFullAddress(BuildMI(*BB, MI, DL, TII->get(Opc)), AM) | |||
35036 | .addReg(MI.getOperand(X86::AddrNumOperands).getReg()); | |||
35037 | ||||
35038 | // Reload the original control word now. | |||
35039 | addFrameReference(BuildMI(*BB, MI, DL, | |||
35040 | TII->get(X86::FLDCW16m)), OrigCWFrameIdx); | |||
35041 | ||||
35042 | MI.eraseFromParent(); // The pseudo instruction is gone now. | |||
35043 | return BB; | |||
35044 | } | |||
35045 | ||||
35046 | // xbegin | |||
35047 | case X86::XBEGIN: | |||
35048 | return emitXBegin(MI, BB, Subtarget.getInstrInfo()); | |||
35049 | ||||
35050 | case X86::VAARG_64: | |||
35051 | case X86::VAARG_X32: | |||
35052 | return EmitVAARGWithCustomInserter(MI, BB); | |||
35053 | ||||
35054 | case X86::EH_SjLj_SetJmp32: | |||
35055 | case X86::EH_SjLj_SetJmp64: | |||
35056 | return emitEHSjLjSetJmp(MI, BB); | |||
35057 | ||||
35058 | case X86::EH_SjLj_LongJmp32: | |||
35059 | case X86::EH_SjLj_LongJmp64: | |||
35060 | return emitEHSjLjLongJmp(MI, BB); | |||
35061 | ||||
35062 | case X86::Int_eh_sjlj_setup_dispatch: | |||
35063 | return EmitSjLjDispatchBlock(MI, BB); | |||
35064 | ||||
35065 | case TargetOpcode::STATEPOINT: | |||
35066 | // As an implementation detail, STATEPOINT shares the STACKMAP format at | |||
35067 | // this point in the process. We diverge later. | |||
35068 | return emitPatchPoint(MI, BB); | |||
35069 | ||||
35070 | case TargetOpcode::STACKMAP: | |||
35071 | case TargetOpcode::PATCHPOINT: | |||
35072 | return emitPatchPoint(MI, BB); | |||
35073 | ||||
35074 | case TargetOpcode::PATCHABLE_EVENT_CALL: | |||
35075 | case TargetOpcode::PATCHABLE_TYPED_EVENT_CALL: | |||
35076 | return BB; | |||
35077 | ||||
35078 | case X86::LCMPXCHG8B: { | |||
35079 | const X86RegisterInfo *TRI = Subtarget.getRegisterInfo(); | |||
35080 | // In addition to 4 E[ABCD] registers implied by encoding, CMPXCHG8B | |||
35081 | // requires a memory operand. If it happens that current architecture is | |||
35082 | // i686 and for current function we need a base pointer | |||
35083 | // - which is ESI for i686 - register allocator would not be able to | |||
35084 | // allocate registers for an address in form of X(%reg, %reg, Y) | |||
35085 | // - there never would be enough unreserved registers during regalloc | |||
35086 | // (without the need for base ptr the only option would be X(%edi, %esi, Y). | |||
35087 | // We are giving a hand to register allocator by precomputing the address in | |||
35088 | // a new vreg using LEA. | |||
35089 | ||||
35090 | // If it is not i686 or there is no base pointer - nothing to do here. | |||
35091 | if (!Subtarget.is32Bit() || !TRI->hasBasePointer(*MF)) | |||
35092 | return BB; | |||
35093 | ||||
35094 | // Even though this code does not necessarily needs the base pointer to | |||
35095 | // be ESI, we check for that. The reason: if this assert fails, there are | |||
35096 | // some changes happened in the compiler base pointer handling, which most | |||
35097 | // probably have to be addressed somehow here. | |||
35098 | assert(TRI->getBaseRegister() == X86::ESI &&(static_cast <bool> (TRI->getBaseRegister() == X86:: ESI && "LCMPXCHG8B custom insertion for i686 is written with X86::ESI as a " "base pointer in mind") ? void (0) : __assert_fail ("TRI->getBaseRegister() == X86::ESI && \"LCMPXCHG8B custom insertion for i686 is written with X86::ESI as a \" \"base pointer in mind\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 35100, __extension__ __PRETTY_FUNCTION__)) | |||
35099 | "LCMPXCHG8B custom insertion for i686 is written with X86::ESI as a "(static_cast <bool> (TRI->getBaseRegister() == X86:: ESI && "LCMPXCHG8B custom insertion for i686 is written with X86::ESI as a " "base pointer in mind") ? void (0) : __assert_fail ("TRI->getBaseRegister() == X86::ESI && \"LCMPXCHG8B custom insertion for i686 is written with X86::ESI as a \" \"base pointer in mind\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 35100, __extension__ __PRETTY_FUNCTION__)) | |||
35100 | "base pointer in mind")(static_cast <bool> (TRI->getBaseRegister() == X86:: ESI && "LCMPXCHG8B custom insertion for i686 is written with X86::ESI as a " "base pointer in mind") ? void (0) : __assert_fail ("TRI->getBaseRegister() == X86::ESI && \"LCMPXCHG8B custom insertion for i686 is written with X86::ESI as a \" \"base pointer in mind\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 35100, __extension__ __PRETTY_FUNCTION__)); | |||
35101 | ||||
35102 | MachineRegisterInfo &MRI = MF->getRegInfo(); | |||
35103 | MVT SPTy = getPointerTy(MF->getDataLayout()); | |||
35104 | const TargetRegisterClass *AddrRegClass = getRegClassFor(SPTy); | |||
35105 | Register computedAddrVReg = MRI.createVirtualRegister(AddrRegClass); | |||
35106 | ||||
35107 | X86AddressMode AM = getAddressFromInstr(&MI, 0); | |||
35108 | // Regalloc does not need any help when the memory operand of CMPXCHG8B | |||
35109 | // does not use index register. | |||
35110 | if (AM.IndexReg == X86::NoRegister) | |||
35111 | return BB; | |||
35112 | ||||
35113 | // After X86TargetLowering::ReplaceNodeResults CMPXCHG8B is glued to its | |||
35114 | // four operand definitions that are E[ABCD] registers. We skip them and | |||
35115 | // then insert the LEA. | |||
35116 | MachineBasicBlock::reverse_iterator RMBBI(MI.getReverseIterator()); | |||
35117 | while (RMBBI != BB->rend() && (RMBBI->definesRegister(X86::EAX) || | |||
35118 | RMBBI->definesRegister(X86::EBX) || | |||
35119 | RMBBI->definesRegister(X86::ECX) || | |||
35120 | RMBBI->definesRegister(X86::EDX))) { | |||
35121 | ++RMBBI; | |||
35122 | } | |||
35123 | MachineBasicBlock::iterator MBBI(RMBBI); | |||
35124 | addFullAddress( | |||
35125 | BuildMI(*BB, *MBBI, DL, TII->get(X86::LEA32r), computedAddrVReg), AM); | |||
35126 | ||||
35127 | setDirectAddressInInstr(&MI, 0, computedAddrVReg); | |||
35128 | ||||
35129 | return BB; | |||
35130 | } | |||
35131 | case X86::LCMPXCHG16B_NO_RBX: { | |||
35132 | const X86RegisterInfo *TRI = Subtarget.getRegisterInfo(); | |||
35133 | Register BasePtr = TRI->getBaseRegister(); | |||
35134 | if (TRI->hasBasePointer(*MF) && | |||
35135 | (BasePtr == X86::RBX || BasePtr == X86::EBX)) { | |||
35136 | if (!BB->isLiveIn(BasePtr)) | |||
35137 | BB->addLiveIn(BasePtr); | |||
35138 | // Save RBX into a virtual register. | |||
35139 | Register SaveRBX = | |||
35140 | MF->getRegInfo().createVirtualRegister(&X86::GR64RegClass); | |||
35141 | BuildMI(*BB, MI, DL, TII->get(TargetOpcode::COPY), SaveRBX) | |||
35142 | .addReg(X86::RBX); | |||
35143 | Register Dst = MF->getRegInfo().createVirtualRegister(&X86::GR64RegClass); | |||
35144 | MachineInstrBuilder MIB = | |||
35145 | BuildMI(*BB, MI, DL, TII->get(X86::LCMPXCHG16B_SAVE_RBX), Dst); | |||
35146 | for (unsigned Idx = 0; Idx < X86::AddrNumOperands; ++Idx) | |||
35147 | MIB.add(MI.getOperand(Idx)); | |||
35148 | MIB.add(MI.getOperand(X86::AddrNumOperands)); | |||
35149 | MIB.addReg(SaveRBX); | |||
35150 | } else { | |||
35151 | // Simple case, just copy the virtual register to RBX. | |||
35152 | BuildMI(*BB, MI, DL, TII->get(TargetOpcode::COPY), X86::RBX) | |||
35153 | .add(MI.getOperand(X86::AddrNumOperands)); | |||
35154 | MachineInstrBuilder MIB = | |||
35155 | BuildMI(*BB, MI, DL, TII->get(X86::LCMPXCHG16B)); | |||
35156 | for (unsigned Idx = 0; Idx < X86::AddrNumOperands; ++Idx) | |||
35157 | MIB.add(MI.getOperand(Idx)); | |||
35158 | } | |||
35159 | MI.eraseFromParent(); | |||
35160 | return BB; | |||
35161 | } | |||
35162 | case X86::MWAITX: { | |||
35163 | const X86RegisterInfo *TRI = Subtarget.getRegisterInfo(); | |||
35164 | Register BasePtr = TRI->getBaseRegister(); | |||
35165 | bool IsRBX = (BasePtr == X86::RBX || BasePtr == X86::EBX); | |||
35166 | // If no need to save the base pointer, we generate MWAITXrrr, | |||
35167 | // else we generate pseudo MWAITX_SAVE_RBX. | |||
35168 | if (!IsRBX || !TRI->hasBasePointer(*MF)) { | |||
35169 | BuildMI(*BB, MI, DL, TII->get(TargetOpcode::COPY), X86::ECX) | |||
35170 | .addReg(MI.getOperand(0).getReg()); | |||
35171 | BuildMI(*BB, MI, DL, TII->get(TargetOpcode::COPY), X86::EAX) | |||
35172 | .addReg(MI.getOperand(1).getReg()); | |||
35173 | BuildMI(*BB, MI, DL, TII->get(TargetOpcode::COPY), X86::EBX) | |||
35174 | .addReg(MI.getOperand(2).getReg()); | |||
35175 | BuildMI(*BB, MI, DL, TII->get(X86::MWAITXrrr)); | |||
35176 | MI.eraseFromParent(); | |||
35177 | } else { | |||
35178 | if (!BB->isLiveIn(BasePtr)) { | |||
35179 | BB->addLiveIn(BasePtr); | |||
35180 | } | |||
35181 | // Parameters can be copied into ECX and EAX but not EBX yet. | |||
35182 | BuildMI(*BB, MI, DL, TII->get(TargetOpcode::COPY), X86::ECX) | |||
35183 | .addReg(MI.getOperand(0).getReg()); | |||
35184 | BuildMI(*BB, MI, DL, TII->get(TargetOpcode::COPY), X86::EAX) | |||
35185 | .addReg(MI.getOperand(1).getReg()); | |||
35186 | assert(Subtarget.is64Bit() && "Expected 64-bit mode!")(static_cast <bool> (Subtarget.is64Bit() && "Expected 64-bit mode!" ) ? void (0) : __assert_fail ("Subtarget.is64Bit() && \"Expected 64-bit mode!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 35186, __extension__ __PRETTY_FUNCTION__)); | |||
35187 | // Save RBX into a virtual register. | |||
35188 | Register SaveRBX = | |||
35189 | MF->getRegInfo().createVirtualRegister(&X86::GR64RegClass); | |||
35190 | BuildMI(*BB, MI, DL, TII->get(TargetOpcode::COPY), SaveRBX) | |||
35191 | .addReg(X86::RBX); | |||
35192 | // Generate mwaitx pseudo. | |||
35193 | Register Dst = MF->getRegInfo().createVirtualRegister(&X86::GR64RegClass); | |||
35194 | BuildMI(*BB, MI, DL, TII->get(X86::MWAITX_SAVE_RBX)) | |||
35195 | .addDef(Dst) // Destination tied in with SaveRBX. | |||
35196 | .addReg(MI.getOperand(2).getReg()) // input value of EBX. | |||
35197 | .addUse(SaveRBX); // Save of base pointer. | |||
35198 | MI.eraseFromParent(); | |||
35199 | } | |||
35200 | return BB; | |||
35201 | } | |||
35202 | case TargetOpcode::PREALLOCATED_SETUP: { | |||
35203 | assert(Subtarget.is32Bit() && "preallocated only used in 32-bit")(static_cast <bool> (Subtarget.is32Bit() && "preallocated only used in 32-bit" ) ? void (0) : __assert_fail ("Subtarget.is32Bit() && \"preallocated only used in 32-bit\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 35203, __extension__ __PRETTY_FUNCTION__)); | |||
35204 | auto MFI = MF->getInfo<X86MachineFunctionInfo>(); | |||
35205 | MFI->setHasPreallocatedCall(true); | |||
35206 | int64_t PreallocatedId = MI.getOperand(0).getImm(); | |||
35207 | size_t StackAdjustment = MFI->getPreallocatedStackSize(PreallocatedId); | |||
35208 | assert(StackAdjustment != 0 && "0 stack adjustment")(static_cast <bool> (StackAdjustment != 0 && "0 stack adjustment" ) ? void (0) : __assert_fail ("StackAdjustment != 0 && \"0 stack adjustment\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 35208, __extension__ __PRETTY_FUNCTION__)); | |||
35209 | LLVM_DEBUG(dbgs() << "PREALLOCATED_SETUP stack adjustment "do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("x86-isel")) { dbgs() << "PREALLOCATED_SETUP stack adjustment " << StackAdjustment << "\n"; } } while (false) | |||
35210 | << StackAdjustment << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("x86-isel")) { dbgs() << "PREALLOCATED_SETUP stack adjustment " << StackAdjustment << "\n"; } } while (false); | |||
35211 | BuildMI(*BB, MI, DL, TII->get(X86::SUB32ri), X86::ESP) | |||
35212 | .addReg(X86::ESP) | |||
35213 | .addImm(StackAdjustment); | |||
35214 | MI.eraseFromParent(); | |||
35215 | return BB; | |||
35216 | } | |||
35217 | case TargetOpcode::PREALLOCATED_ARG: { | |||
35218 | assert(Subtarget.is32Bit() && "preallocated calls only used in 32-bit")(static_cast <bool> (Subtarget.is32Bit() && "preallocated calls only used in 32-bit" ) ? void (0) : __assert_fail ("Subtarget.is32Bit() && \"preallocated calls only used in 32-bit\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 35218, __extension__ __PRETTY_FUNCTION__)); | |||
35219 | int64_t PreallocatedId = MI.getOperand(1).getImm(); | |||
35220 | int64_t ArgIdx = MI.getOperand(2).getImm(); | |||
35221 | auto MFI = MF->getInfo<X86MachineFunctionInfo>(); | |||
35222 | size_t ArgOffset = MFI->getPreallocatedArgOffsets(PreallocatedId)[ArgIdx]; | |||
35223 | LLVM_DEBUG(dbgs() << "PREALLOCATED_ARG arg index " << ArgIdxdo { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("x86-isel")) { dbgs() << "PREALLOCATED_ARG arg index " << ArgIdx << ", arg offset " << ArgOffset << "\n"; } } while (false) | |||
35224 | << ", arg offset " << ArgOffset << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("x86-isel")) { dbgs() << "PREALLOCATED_ARG arg index " << ArgIdx << ", arg offset " << ArgOffset << "\n"; } } while (false); | |||
35225 | // stack pointer + offset | |||
35226 | addRegOffset( | |||
35227 | BuildMI(*BB, MI, DL, TII->get(X86::LEA32r), MI.getOperand(0).getReg()), | |||
35228 | X86::ESP, false, ArgOffset); | |||
35229 | MI.eraseFromParent(); | |||
35230 | return BB; | |||
35231 | } | |||
35232 | case X86::PTDPBSSD: | |||
35233 | case X86::PTDPBSUD: | |||
35234 | case X86::PTDPBUSD: | |||
35235 | case X86::PTDPBUUD: | |||
35236 | case X86::PTDPBF16PS: { | |||
35237 | unsigned Opc; | |||
35238 | switch (MI.getOpcode()) { | |||
35239 | default: llvm_unreachable("illegal opcode!")::llvm::llvm_unreachable_internal("illegal opcode!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 35239); | |||
35240 | case X86::PTDPBSSD: Opc = X86::TDPBSSD; break; | |||
35241 | case X86::PTDPBSUD: Opc = X86::TDPBSUD; break; | |||
35242 | case X86::PTDPBUSD: Opc = X86::TDPBUSD; break; | |||
35243 | case X86::PTDPBUUD: Opc = X86::TDPBUUD; break; | |||
35244 | case X86::PTDPBF16PS: Opc = X86::TDPBF16PS; break; | |||
35245 | } | |||
35246 | ||||
35247 | MachineInstrBuilder MIB = BuildMI(*BB, MI, DL, TII->get(Opc)); | |||
35248 | MIB.addReg(TMMImmToTMMReg(MI.getOperand(0).getImm()), RegState::Define); | |||
35249 | MIB.addReg(TMMImmToTMMReg(MI.getOperand(0).getImm()), RegState::Undef); | |||
35250 | MIB.addReg(TMMImmToTMMReg(MI.getOperand(1).getImm()), RegState::Undef); | |||
35251 | MIB.addReg(TMMImmToTMMReg(MI.getOperand(2).getImm()), RegState::Undef); | |||
35252 | ||||
35253 | MI.eraseFromParent(); // The pseudo is gone now. | |||
35254 | return BB; | |||
35255 | } | |||
35256 | case X86::PTILEZERO: { | |||
35257 | unsigned Imm = MI.getOperand(0).getImm(); | |||
35258 | BuildMI(*BB, MI, DL, TII->get(X86::TILEZERO), TMMImmToTMMReg(Imm)); | |||
35259 | MI.eraseFromParent(); // The pseudo is gone now. | |||
35260 | return BB; | |||
35261 | } | |||
35262 | case X86::PTILELOADD: | |||
35263 | case X86::PTILELOADDT1: | |||
35264 | case X86::PTILESTORED: { | |||
35265 | unsigned Opc; | |||
35266 | switch (MI.getOpcode()) { | |||
35267 | default: llvm_unreachable("illegal opcode!")::llvm::llvm_unreachable_internal("illegal opcode!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 35267); | |||
35268 | case X86::PTILELOADD: Opc = X86::TILELOADD; break; | |||
35269 | case X86::PTILELOADDT1: Opc = X86::TILELOADDT1; break; | |||
35270 | case X86::PTILESTORED: Opc = X86::TILESTORED; break; | |||
35271 | } | |||
35272 | ||||
35273 | MachineInstrBuilder MIB = BuildMI(*BB, MI, DL, TII->get(Opc)); | |||
35274 | unsigned CurOp = 0; | |||
35275 | if (Opc != X86::TILESTORED) | |||
35276 | MIB.addReg(TMMImmToTMMReg(MI.getOperand(CurOp++).getImm()), | |||
35277 | RegState::Define); | |||
35278 | ||||
35279 | MIB.add(MI.getOperand(CurOp++)); // base | |||
35280 | MIB.add(MI.getOperand(CurOp++)); // scale | |||
35281 | MIB.add(MI.getOperand(CurOp++)); // index -- stride | |||
35282 | MIB.add(MI.getOperand(CurOp++)); // displacement | |||
35283 | MIB.add(MI.getOperand(CurOp++)); // segment | |||
35284 | ||||
35285 | if (Opc == X86::TILESTORED) | |||
35286 | MIB.addReg(TMMImmToTMMReg(MI.getOperand(CurOp++).getImm()), | |||
35287 | RegState::Undef); | |||
35288 | ||||
35289 | MI.eraseFromParent(); // The pseudo is gone now. | |||
35290 | return BB; | |||
35291 | } | |||
35292 | } | |||
35293 | } | |||
35294 | ||||
35295 | //===----------------------------------------------------------------------===// | |||
35296 | // X86 Optimization Hooks | |||
35297 | //===----------------------------------------------------------------------===// | |||
35298 | ||||
35299 | bool | |||
35300 | X86TargetLowering::targetShrinkDemandedConstant(SDValue Op, | |||
35301 | const APInt &DemandedBits, | |||
35302 | const APInt &DemandedElts, | |||
35303 | TargetLoweringOpt &TLO) const { | |||
35304 | EVT VT = Op.getValueType(); | |||
35305 | unsigned Opcode = Op.getOpcode(); | |||
35306 | unsigned EltSize = VT.getScalarSizeInBits(); | |||
35307 | ||||
35308 | if (VT.isVector()) { | |||
35309 | // If the constant is only all signbits in the active bits, then we should | |||
35310 | // extend it to the entire constant to allow it act as a boolean constant | |||
35311 | // vector. | |||
35312 | auto NeedsSignExtension = [&](SDValue V, unsigned ActiveBits) { | |||
35313 | if (!ISD::isBuildVectorOfConstantSDNodes(V.getNode())) | |||
35314 | return false; | |||
35315 | for (unsigned i = 0, e = V.getNumOperands(); i != e; ++i) { | |||
35316 | if (!DemandedElts[i] || V.getOperand(i).isUndef()) | |||
35317 | continue; | |||
35318 | const APInt &Val = V.getConstantOperandAPInt(i); | |||
35319 | if (Val.getBitWidth() > Val.getNumSignBits() && | |||
35320 | Val.trunc(ActiveBits).getNumSignBits() == ActiveBits) | |||
35321 | return true; | |||
35322 | } | |||
35323 | return false; | |||
35324 | }; | |||
35325 | // For vectors - if we have a constant, then try to sign extend. | |||
35326 | // TODO: Handle AND/ANDN cases. | |||
35327 | unsigned ActiveBits = DemandedBits.getActiveBits(); | |||
35328 | if (EltSize > ActiveBits && EltSize > 1 && isTypeLegal(VT) && | |||
35329 | (Opcode == ISD::OR || Opcode == ISD::XOR) && | |||
35330 | NeedsSignExtension(Op.getOperand(1), ActiveBits)) { | |||
35331 | EVT ExtSVT = EVT::getIntegerVT(*TLO.DAG.getContext(), ActiveBits); | |||
35332 | EVT ExtVT = EVT::getVectorVT(*TLO.DAG.getContext(), ExtSVT, | |||
35333 | VT.getVectorNumElements()); | |||
35334 | SDValue NewC = | |||
35335 | TLO.DAG.getNode(ISD::SIGN_EXTEND_INREG, SDLoc(Op), VT, | |||
35336 | Op.getOperand(1), TLO.DAG.getValueType(ExtVT)); | |||
35337 | SDValue NewOp = | |||
35338 | TLO.DAG.getNode(Opcode, SDLoc(Op), VT, Op.getOperand(0), NewC); | |||
35339 | return TLO.CombineTo(Op, NewOp); | |||
35340 | } | |||
35341 | return false; | |||
35342 | } | |||
35343 | ||||
35344 | // Only optimize Ands to prevent shrinking a constant that could be | |||
35345 | // matched by movzx. | |||
35346 | if (Opcode != ISD::AND) | |||
35347 | return false; | |||
35348 | ||||
35349 | // Make sure the RHS really is a constant. | |||
35350 | ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op.getOperand(1)); | |||
35351 | if (!C) | |||
35352 | return false; | |||
35353 | ||||
35354 | const APInt &Mask = C->getAPIntValue(); | |||
35355 | ||||
35356 | // Clear all non-demanded bits initially. | |||
35357 | APInt ShrunkMask = Mask & DemandedBits; | |||
35358 | ||||
35359 | // Find the width of the shrunk mask. | |||
35360 | unsigned Width = ShrunkMask.getActiveBits(); | |||
35361 | ||||
35362 | // If the mask is all 0s there's nothing to do here. | |||
35363 | if (Width == 0) | |||
35364 | return false; | |||
35365 | ||||
35366 | // Find the next power of 2 width, rounding up to a byte. | |||
35367 | Width = PowerOf2Ceil(std::max(Width, 8U)); | |||
35368 | // Truncate the width to size to handle illegal types. | |||
35369 | Width = std::min(Width, EltSize); | |||
35370 | ||||
35371 | // Calculate a possible zero extend mask for this constant. | |||
35372 | APInt ZeroExtendMask = APInt::getLowBitsSet(EltSize, Width); | |||
35373 | ||||
35374 | // If we aren't changing the mask, just return true to keep it and prevent | |||
35375 | // the caller from optimizing. | |||
35376 | if (ZeroExtendMask == Mask) | |||
35377 | return true; | |||
35378 | ||||
35379 | // Make sure the new mask can be represented by a combination of mask bits | |||
35380 | // and non-demanded bits. | |||
35381 | if (!ZeroExtendMask.isSubsetOf(Mask | ~DemandedBits)) | |||
35382 | return false; | |||
35383 | ||||
35384 | // Replace the constant with the zero extend mask. | |||
35385 | SDLoc DL(Op); | |||
35386 | SDValue NewC = TLO.DAG.getConstant(ZeroExtendMask, DL, VT); | |||
35387 | SDValue NewOp = TLO.DAG.getNode(ISD::AND, DL, VT, Op.getOperand(0), NewC); | |||
35388 | return TLO.CombineTo(Op, NewOp); | |||
35389 | } | |||
35390 | ||||
35391 | void X86TargetLowering::computeKnownBitsForTargetNode(const SDValue Op, | |||
35392 | KnownBits &Known, | |||
35393 | const APInt &DemandedElts, | |||
35394 | const SelectionDAG &DAG, | |||
35395 | unsigned Depth) const { | |||
35396 | unsigned BitWidth = Known.getBitWidth(); | |||
35397 | unsigned NumElts = DemandedElts.getBitWidth(); | |||
35398 | unsigned Opc = Op.getOpcode(); | |||
35399 | EVT VT = Op.getValueType(); | |||
35400 | assert((Opc >= ISD::BUILTIN_OP_END ||(static_cast <bool> ((Opc >= ISD::BUILTIN_OP_END || Opc == ISD::INTRINSIC_WO_CHAIN || Opc == ISD::INTRINSIC_W_CHAIN || Opc == ISD::INTRINSIC_VOID) && "Should use MaskedValueIsZero if you don't know whether Op" " is a target node!") ? void (0) : __assert_fail ("(Opc >= ISD::BUILTIN_OP_END || Opc == ISD::INTRINSIC_WO_CHAIN || Opc == ISD::INTRINSIC_W_CHAIN || Opc == ISD::INTRINSIC_VOID) && \"Should use MaskedValueIsZero if you don't know whether Op\" \" is a target node!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 35405, __extension__ __PRETTY_FUNCTION__)) | |||
35401 | Opc == ISD::INTRINSIC_WO_CHAIN ||(static_cast <bool> ((Opc >= ISD::BUILTIN_OP_END || Opc == ISD::INTRINSIC_WO_CHAIN || Opc == ISD::INTRINSIC_W_CHAIN || Opc == ISD::INTRINSIC_VOID) && "Should use MaskedValueIsZero if you don't know whether Op" " is a target node!") ? void (0) : __assert_fail ("(Opc >= ISD::BUILTIN_OP_END || Opc == ISD::INTRINSIC_WO_CHAIN || Opc == ISD::INTRINSIC_W_CHAIN || Opc == ISD::INTRINSIC_VOID) && \"Should use MaskedValueIsZero if you don't know whether Op\" \" is a target node!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 35405, __extension__ __PRETTY_FUNCTION__)) | |||
35402 | Opc == ISD::INTRINSIC_W_CHAIN ||(static_cast <bool> ((Opc >= ISD::BUILTIN_OP_END || Opc == ISD::INTRINSIC_WO_CHAIN || Opc == ISD::INTRINSIC_W_CHAIN || Opc == ISD::INTRINSIC_VOID) && "Should use MaskedValueIsZero if you don't know whether Op" " is a target node!") ? void (0) : __assert_fail ("(Opc >= ISD::BUILTIN_OP_END || Opc == ISD::INTRINSIC_WO_CHAIN || Opc == ISD::INTRINSIC_W_CHAIN || Opc == ISD::INTRINSIC_VOID) && \"Should use MaskedValueIsZero if you don't know whether Op\" \" is a target node!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 35405, __extension__ __PRETTY_FUNCTION__)) | |||
35403 | Opc == ISD::INTRINSIC_VOID) &&(static_cast <bool> ((Opc >= ISD::BUILTIN_OP_END || Opc == ISD::INTRINSIC_WO_CHAIN || Opc == ISD::INTRINSIC_W_CHAIN || Opc == ISD::INTRINSIC_VOID) && "Should use MaskedValueIsZero if you don't know whether Op" " is a target node!") ? void (0) : __assert_fail ("(Opc >= ISD::BUILTIN_OP_END || Opc == ISD::INTRINSIC_WO_CHAIN || Opc == ISD::INTRINSIC_W_CHAIN || Opc == ISD::INTRINSIC_VOID) && \"Should use MaskedValueIsZero if you don't know whether Op\" \" is a target node!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 35405, __extension__ __PRETTY_FUNCTION__)) | |||
35404 | "Should use MaskedValueIsZero if you don't know whether Op"(static_cast <bool> ((Opc >= ISD::BUILTIN_OP_END || Opc == ISD::INTRINSIC_WO_CHAIN || Opc == ISD::INTRINSIC_W_CHAIN || Opc == ISD::INTRINSIC_VOID) && "Should use MaskedValueIsZero if you don't know whether Op" " is a target node!") ? void (0) : __assert_fail ("(Opc >= ISD::BUILTIN_OP_END || Opc == ISD::INTRINSIC_WO_CHAIN || Opc == ISD::INTRINSIC_W_CHAIN || Opc == ISD::INTRINSIC_VOID) && \"Should use MaskedValueIsZero if you don't know whether Op\" \" is a target node!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 35405, __extension__ __PRETTY_FUNCTION__)) | |||
35405 | " is a target node!")(static_cast <bool> ((Opc >= ISD::BUILTIN_OP_END || Opc == ISD::INTRINSIC_WO_CHAIN || Opc == ISD::INTRINSIC_W_CHAIN || Opc == ISD::INTRINSIC_VOID) && "Should use MaskedValueIsZero if you don't know whether Op" " is a target node!") ? void (0) : __assert_fail ("(Opc >= ISD::BUILTIN_OP_END || Opc == ISD::INTRINSIC_WO_CHAIN || Opc == ISD::INTRINSIC_W_CHAIN || Opc == ISD::INTRINSIC_VOID) && \"Should use MaskedValueIsZero if you don't know whether Op\" \" is a target node!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 35405, __extension__ __PRETTY_FUNCTION__)); | |||
35406 | ||||
35407 | Known.resetAll(); | |||
35408 | switch (Opc) { | |||
35409 | default: break; | |||
35410 | case X86ISD::SETCC: | |||
35411 | Known.Zero.setBitsFrom(1); | |||
35412 | break; | |||
35413 | case X86ISD::MOVMSK: { | |||
35414 | unsigned NumLoBits = Op.getOperand(0).getValueType().getVectorNumElements(); | |||
35415 | Known.Zero.setBitsFrom(NumLoBits); | |||
35416 | break; | |||
35417 | } | |||
35418 | case X86ISD::PEXTRB: | |||
35419 | case X86ISD::PEXTRW: { | |||
35420 | SDValue Src = Op.getOperand(0); | |||
35421 | EVT SrcVT = Src.getValueType(); | |||
35422 | APInt DemandedElt = APInt::getOneBitSet(SrcVT.getVectorNumElements(), | |||
35423 | Op.getConstantOperandVal(1)); | |||
35424 | Known = DAG.computeKnownBits(Src, DemandedElt, Depth + 1); | |||
35425 | Known = Known.anyextOrTrunc(BitWidth); | |||
35426 | Known.Zero.setBitsFrom(SrcVT.getScalarSizeInBits()); | |||
35427 | break; | |||
35428 | } | |||
35429 | case X86ISD::VSRAI: | |||
35430 | case X86ISD::VSHLI: | |||
35431 | case X86ISD::VSRLI: { | |||
35432 | unsigned ShAmt = Op.getConstantOperandVal(1); | |||
35433 | if (ShAmt >= VT.getScalarSizeInBits()) { | |||
35434 | Known.setAllZero(); | |||
35435 | break; | |||
35436 | } | |||
35437 | ||||
35438 | Known = DAG.computeKnownBits(Op.getOperand(0), DemandedElts, Depth + 1); | |||
35439 | if (Opc == X86ISD::VSHLI) { | |||
35440 | Known.Zero <<= ShAmt; | |||
35441 | Known.One <<= ShAmt; | |||
35442 | // Low bits are known zero. | |||
35443 | Known.Zero.setLowBits(ShAmt); | |||
35444 | } else if (Opc == X86ISD::VSRLI) { | |||
35445 | Known.Zero.lshrInPlace(ShAmt); | |||
35446 | Known.One.lshrInPlace(ShAmt); | |||
35447 | // High bits are known zero. | |||
35448 | Known.Zero.setHighBits(ShAmt); | |||
35449 | } else { | |||
35450 | Known.Zero.ashrInPlace(ShAmt); | |||
35451 | Known.One.ashrInPlace(ShAmt); | |||
35452 | } | |||
35453 | break; | |||
35454 | } | |||
35455 | case X86ISD::PACKUS: { | |||
35456 | // PACKUS is just a truncation if the upper half is zero. | |||
35457 | APInt DemandedLHS, DemandedRHS; | |||
35458 | getPackDemandedElts(VT, DemandedElts, DemandedLHS, DemandedRHS); | |||
35459 | ||||
35460 | Known.One = APInt::getAllOnesValue(BitWidth * 2); | |||
35461 | Known.Zero = APInt::getAllOnesValue(BitWidth * 2); | |||
35462 | ||||
35463 | KnownBits Known2; | |||
35464 | if (!!DemandedLHS) { | |||
35465 | Known2 = DAG.computeKnownBits(Op.getOperand(0), DemandedLHS, Depth + 1); | |||
35466 | Known = KnownBits::commonBits(Known, Known2); | |||
35467 | } | |||
35468 | if (!!DemandedRHS) { | |||
35469 | Known2 = DAG.computeKnownBits(Op.getOperand(1), DemandedRHS, Depth + 1); | |||
35470 | Known = KnownBits::commonBits(Known, Known2); | |||
35471 | } | |||
35472 | ||||
35473 | if (Known.countMinLeadingZeros() < BitWidth) | |||
35474 | Known.resetAll(); | |||
35475 | Known = Known.trunc(BitWidth); | |||
35476 | break; | |||
35477 | } | |||
35478 | case X86ISD::VBROADCAST: { | |||
35479 | SDValue Src = Op.getOperand(0); | |||
35480 | if (!Src.getSimpleValueType().isVector()) { | |||
35481 | Known = DAG.computeKnownBits(Src, Depth + 1); | |||
35482 | return; | |||
35483 | } | |||
35484 | break; | |||
35485 | } | |||
35486 | case X86ISD::ANDNP: { | |||
35487 | KnownBits Known2; | |||
35488 | Known = DAG.computeKnownBits(Op.getOperand(1), DemandedElts, Depth + 1); | |||
35489 | Known2 = DAG.computeKnownBits(Op.getOperand(0), DemandedElts, Depth + 1); | |||
35490 | ||||
35491 | // ANDNP = (~X & Y); | |||
35492 | Known.One &= Known2.Zero; | |||
35493 | Known.Zero |= Known2.One; | |||
35494 | break; | |||
35495 | } | |||
35496 | case X86ISD::FOR: { | |||
35497 | KnownBits Known2; | |||
35498 | Known = DAG.computeKnownBits(Op.getOperand(1), DemandedElts, Depth + 1); | |||
35499 | Known2 = DAG.computeKnownBits(Op.getOperand(0), DemandedElts, Depth + 1); | |||
35500 | ||||
35501 | Known |= Known2; | |||
35502 | break; | |||
35503 | } | |||
35504 | case X86ISD::PSADBW: { | |||
35505 | assert(VT.getScalarType() == MVT::i64 &&(static_cast <bool> (VT.getScalarType() == MVT::i64 && Op.getOperand(0).getValueType().getScalarType() == MVT::i8 && "Unexpected PSADBW types") ? void (0) : __assert_fail ("VT.getScalarType() == MVT::i64 && Op.getOperand(0).getValueType().getScalarType() == MVT::i8 && \"Unexpected PSADBW types\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 35507, __extension__ __PRETTY_FUNCTION__)) | |||
35506 | Op.getOperand(0).getValueType().getScalarType() == MVT::i8 &&(static_cast <bool> (VT.getScalarType() == MVT::i64 && Op.getOperand(0).getValueType().getScalarType() == MVT::i8 && "Unexpected PSADBW types") ? void (0) : __assert_fail ("VT.getScalarType() == MVT::i64 && Op.getOperand(0).getValueType().getScalarType() == MVT::i8 && \"Unexpected PSADBW types\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 35507, __extension__ __PRETTY_FUNCTION__)) | |||
35507 | "Unexpected PSADBW types")(static_cast <bool> (VT.getScalarType() == MVT::i64 && Op.getOperand(0).getValueType().getScalarType() == MVT::i8 && "Unexpected PSADBW types") ? void (0) : __assert_fail ("VT.getScalarType() == MVT::i64 && Op.getOperand(0).getValueType().getScalarType() == MVT::i8 && \"Unexpected PSADBW types\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 35507, __extension__ __PRETTY_FUNCTION__)); | |||
35508 | ||||
35509 | // PSADBW - fills low 16 bits and zeros upper 48 bits of each i64 result. | |||
35510 | Known.Zero.setBitsFrom(16); | |||
35511 | break; | |||
35512 | } | |||
35513 | case X86ISD::PMULUDQ: { | |||
35514 | KnownBits Known2; | |||
35515 | Known = DAG.computeKnownBits(Op.getOperand(1), DemandedElts, Depth + 1); | |||
35516 | Known2 = DAG.computeKnownBits(Op.getOperand(0), DemandedElts, Depth + 1); | |||
35517 | ||||
35518 | Known = Known.trunc(BitWidth / 2).zext(BitWidth); | |||
35519 | Known2 = Known2.trunc(BitWidth / 2).zext(BitWidth); | |||
35520 | Known = KnownBits::mul(Known, Known2); | |||
35521 | break; | |||
35522 | } | |||
35523 | case X86ISD::CMOV: { | |||
35524 | Known = DAG.computeKnownBits(Op.getOperand(1), Depth + 1); | |||
35525 | // If we don't know any bits, early out. | |||
35526 | if (Known.isUnknown()) | |||
35527 | break; | |||
35528 | KnownBits Known2 = DAG.computeKnownBits(Op.getOperand(0), Depth + 1); | |||
35529 | ||||
35530 | // Only known if known in both the LHS and RHS. | |||
35531 | Known = KnownBits::commonBits(Known, Known2); | |||
35532 | break; | |||
35533 | } | |||
35534 | case X86ISD::BEXTR: | |||
35535 | case X86ISD::BEXTRI: { | |||
35536 | SDValue Op0 = Op.getOperand(0); | |||
35537 | SDValue Op1 = Op.getOperand(1); | |||
35538 | ||||
35539 | if (auto* Cst1 = dyn_cast<ConstantSDNode>(Op1)) { | |||
35540 | unsigned Shift = Cst1->getAPIntValue().extractBitsAsZExtValue(8, 0); | |||
35541 | unsigned Length = Cst1->getAPIntValue().extractBitsAsZExtValue(8, 8); | |||
35542 | ||||
35543 | // If the length is 0, the result is 0. | |||
35544 | if (Length == 0) { | |||
35545 | Known.setAllZero(); | |||
35546 | break; | |||
35547 | } | |||
35548 | ||||
35549 | if ((Shift + Length) <= BitWidth) { | |||
35550 | Known = DAG.computeKnownBits(Op0, Depth + 1); | |||
35551 | Known = Known.extractBits(Length, Shift); | |||
35552 | Known = Known.zextOrTrunc(BitWidth); | |||
35553 | } | |||
35554 | } | |||
35555 | break; | |||
35556 | } | |||
35557 | case X86ISD::PDEP: { | |||
35558 | KnownBits Known2; | |||
35559 | Known = DAG.computeKnownBits(Op.getOperand(1), DemandedElts, Depth + 1); | |||
35560 | Known2 = DAG.computeKnownBits(Op.getOperand(0), DemandedElts, Depth + 1); | |||
35561 | // Zeros are retained from the mask operand. But not ones. | |||
35562 | Known.One.clearAllBits(); | |||
35563 | // The result will have at least as many trailing zeros as the non-mask | |||
35564 | // operand since bits can only map to the same or higher bit position. | |||
35565 | Known.Zero.setLowBits(Known2.countMinTrailingZeros()); | |||
35566 | break; | |||
35567 | } | |||
35568 | case X86ISD::PEXT: { | |||
35569 | Known = DAG.computeKnownBits(Op.getOperand(1), DemandedElts, Depth + 1); | |||
35570 | // The result has as many leading zeros as the number of zeroes in the mask. | |||
35571 | unsigned Count = Known.Zero.countPopulation(); | |||
35572 | Known.Zero = APInt::getHighBitsSet(BitWidth, Count); | |||
35573 | Known.One.clearAllBits(); | |||
35574 | break; | |||
35575 | } | |||
35576 | case X86ISD::VTRUNC: | |||
35577 | case X86ISD::VTRUNCS: | |||
35578 | case X86ISD::VTRUNCUS: | |||
35579 | case X86ISD::CVTSI2P: | |||
35580 | case X86ISD::CVTUI2P: | |||
35581 | case X86ISD::CVTP2SI: | |||
35582 | case X86ISD::CVTP2UI: | |||
35583 | case X86ISD::MCVTP2SI: | |||
35584 | case X86ISD::MCVTP2UI: | |||
35585 | case X86ISD::CVTTP2SI: | |||
35586 | case X86ISD::CVTTP2UI: | |||
35587 | case X86ISD::MCVTTP2SI: | |||
35588 | case X86ISD::MCVTTP2UI: | |||
35589 | case X86ISD::MCVTSI2P: | |||
35590 | case X86ISD::MCVTUI2P: | |||
35591 | case X86ISD::VFPROUND: | |||
35592 | case X86ISD::VMFPROUND: | |||
35593 | case X86ISD::CVTPS2PH: | |||
35594 | case X86ISD::MCVTPS2PH: { | |||
35595 | // Truncations/Conversions - upper elements are known zero. | |||
35596 | EVT SrcVT = Op.getOperand(0).getValueType(); | |||
35597 | if (SrcVT.isVector()) { | |||
35598 | unsigned NumSrcElts = SrcVT.getVectorNumElements(); | |||
35599 | if (NumElts > NumSrcElts && | |||
35600 | DemandedElts.countTrailingZeros() >= NumSrcElts) | |||
35601 | Known.setAllZero(); | |||
35602 | } | |||
35603 | break; | |||
35604 | } | |||
35605 | case X86ISD::STRICT_CVTTP2SI: | |||
35606 | case X86ISD::STRICT_CVTTP2UI: | |||
35607 | case X86ISD::STRICT_CVTSI2P: | |||
35608 | case X86ISD::STRICT_CVTUI2P: | |||
35609 | case X86ISD::STRICT_VFPROUND: | |||
35610 | case X86ISD::STRICT_CVTPS2PH: { | |||
35611 | // Strict Conversions - upper elements are known zero. | |||
35612 | EVT SrcVT = Op.getOperand(1).getValueType(); | |||
35613 | if (SrcVT.isVector()) { | |||
35614 | unsigned NumSrcElts = SrcVT.getVectorNumElements(); | |||
35615 | if (NumElts > NumSrcElts && | |||
35616 | DemandedElts.countTrailingZeros() >= NumSrcElts) | |||
35617 | Known.setAllZero(); | |||
35618 | } | |||
35619 | break; | |||
35620 | } | |||
35621 | case X86ISD::MOVQ2DQ: { | |||
35622 | // Move from MMX to XMM. Upper half of XMM should be 0. | |||
35623 | if (DemandedElts.countTrailingZeros() >= (NumElts / 2)) | |||
35624 | Known.setAllZero(); | |||
35625 | break; | |||
35626 | } | |||
35627 | } | |||
35628 | ||||
35629 | // Handle target shuffles. | |||
35630 | // TODO - use resolveTargetShuffleInputs once we can limit recursive depth. | |||
35631 | if (isTargetShuffle(Opc)) { | |||
35632 | SmallVector<int, 64> Mask; | |||
35633 | SmallVector<SDValue, 2> Ops; | |||
35634 | if (getTargetShuffleMask(Op.getNode(), VT.getSimpleVT(), true, Ops, Mask)) { | |||
35635 | unsigned NumOps = Ops.size(); | |||
35636 | unsigned NumElts = VT.getVectorNumElements(); | |||
35637 | if (Mask.size() == NumElts) { | |||
35638 | SmallVector<APInt, 2> DemandedOps(NumOps, APInt(NumElts, 0)); | |||
35639 | Known.Zero.setAllBits(); Known.One.setAllBits(); | |||
35640 | for (unsigned i = 0; i != NumElts; ++i) { | |||
35641 | if (!DemandedElts[i]) | |||
35642 | continue; | |||
35643 | int M = Mask[i]; | |||
35644 | if (M == SM_SentinelUndef) { | |||
35645 | // For UNDEF elements, we don't know anything about the common state | |||
35646 | // of the shuffle result. | |||
35647 | Known.resetAll(); | |||
35648 | break; | |||
35649 | } | |||
35650 | if (M == SM_SentinelZero) { | |||
35651 | Known.One.clearAllBits(); | |||
35652 | continue; | |||
35653 | } | |||
35654 | assert(0 <= M && (unsigned)M < (NumOps * NumElts) &&(static_cast <bool> (0 <= M && (unsigned)M < (NumOps * NumElts) && "Shuffle index out of range") ? void (0) : __assert_fail ("0 <= M && (unsigned)M < (NumOps * NumElts) && \"Shuffle index out of range\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 35655, __extension__ __PRETTY_FUNCTION__)) | |||
35655 | "Shuffle index out of range")(static_cast <bool> (0 <= M && (unsigned)M < (NumOps * NumElts) && "Shuffle index out of range") ? void (0) : __assert_fail ("0 <= M && (unsigned)M < (NumOps * NumElts) && \"Shuffle index out of range\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 35655, __extension__ __PRETTY_FUNCTION__)); | |||
35656 | ||||
35657 | unsigned OpIdx = (unsigned)M / NumElts; | |||
35658 | unsigned EltIdx = (unsigned)M % NumElts; | |||
35659 | if (Ops[OpIdx].getValueType() != VT) { | |||
35660 | // TODO - handle target shuffle ops with different value types. | |||
35661 | Known.resetAll(); | |||
35662 | break; | |||
35663 | } | |||
35664 | DemandedOps[OpIdx].setBit(EltIdx); | |||
35665 | } | |||
35666 | // Known bits are the values that are shared by every demanded element. | |||
35667 | for (unsigned i = 0; i != NumOps && !Known.isUnknown(); ++i) { | |||
35668 | if (!DemandedOps[i]) | |||
35669 | continue; | |||
35670 | KnownBits Known2 = | |||
35671 | DAG.computeKnownBits(Ops[i], DemandedOps[i], Depth + 1); | |||
35672 | Known = KnownBits::commonBits(Known, Known2); | |||
35673 | } | |||
35674 | } | |||
35675 | } | |||
35676 | } | |||
35677 | } | |||
35678 | ||||
35679 | unsigned X86TargetLowering::ComputeNumSignBitsForTargetNode( | |||
35680 | SDValue Op, const APInt &DemandedElts, const SelectionDAG &DAG, | |||
35681 | unsigned Depth) const { | |||
35682 | EVT VT = Op.getValueType(); | |||
35683 | unsigned VTBits = VT.getScalarSizeInBits(); | |||
35684 | unsigned Opcode = Op.getOpcode(); | |||
35685 | switch (Opcode) { | |||
35686 | case X86ISD::SETCC_CARRY: | |||
35687 | // SETCC_CARRY sets the dest to ~0 for true or 0 for false. | |||
35688 | return VTBits; | |||
35689 | ||||
35690 | case X86ISD::VTRUNC: { | |||
35691 | SDValue Src = Op.getOperand(0); | |||
35692 | MVT SrcVT = Src.getSimpleValueType(); | |||
35693 | unsigned NumSrcBits = SrcVT.getScalarSizeInBits(); | |||
35694 | assert(VTBits < NumSrcBits && "Illegal truncation input type")(static_cast <bool> (VTBits < NumSrcBits && "Illegal truncation input type" ) ? void (0) : __assert_fail ("VTBits < NumSrcBits && \"Illegal truncation input type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 35694, __extension__ __PRETTY_FUNCTION__)); | |||
35695 | APInt DemandedSrc = DemandedElts.zextOrTrunc(SrcVT.getVectorNumElements()); | |||
35696 | unsigned Tmp = DAG.ComputeNumSignBits(Src, DemandedSrc, Depth + 1); | |||
35697 | if (Tmp > (NumSrcBits - VTBits)) | |||
35698 | return Tmp - (NumSrcBits - VTBits); | |||
35699 | return 1; | |||
35700 | } | |||
35701 | ||||
35702 | case X86ISD::PACKSS: { | |||
35703 | // PACKSS is just a truncation if the sign bits extend to the packed size. | |||
35704 | APInt DemandedLHS, DemandedRHS; | |||
35705 | getPackDemandedElts(Op.getValueType(), DemandedElts, DemandedLHS, | |||
35706 | DemandedRHS); | |||
35707 | ||||
35708 | unsigned SrcBits = Op.getOperand(0).getScalarValueSizeInBits(); | |||
35709 | unsigned Tmp0 = SrcBits, Tmp1 = SrcBits; | |||
35710 | if (!!DemandedLHS) | |||
35711 | Tmp0 = DAG.ComputeNumSignBits(Op.getOperand(0), DemandedLHS, Depth + 1); | |||
35712 | if (!!DemandedRHS) | |||
35713 | Tmp1 = DAG.ComputeNumSignBits(Op.getOperand(1), DemandedRHS, Depth + 1); | |||
35714 | unsigned Tmp = std::min(Tmp0, Tmp1); | |||
35715 | if (Tmp > (SrcBits - VTBits)) | |||
35716 | return Tmp - (SrcBits - VTBits); | |||
35717 | return 1; | |||
35718 | } | |||
35719 | ||||
35720 | case X86ISD::VBROADCAST: { | |||
35721 | SDValue Src = Op.getOperand(0); | |||
35722 | if (!Src.getSimpleValueType().isVector()) | |||
35723 | return DAG.ComputeNumSignBits(Src, Depth + 1); | |||
35724 | break; | |||
35725 | } | |||
35726 | ||||
35727 | case X86ISD::VSHLI: { | |||
35728 | SDValue Src = Op.getOperand(0); | |||
35729 | const APInt &ShiftVal = Op.getConstantOperandAPInt(1); | |||
35730 | if (ShiftVal.uge(VTBits)) | |||
35731 | return VTBits; // Shifted all bits out --> zero. | |||
35732 | unsigned Tmp = DAG.ComputeNumSignBits(Src, DemandedElts, Depth + 1); | |||
35733 | if (ShiftVal.uge(Tmp)) | |||
35734 | return 1; // Shifted all sign bits out --> unknown. | |||
35735 | return Tmp - ShiftVal.getZExtValue(); | |||
35736 | } | |||
35737 | ||||
35738 | case X86ISD::VSRAI: { | |||
35739 | SDValue Src = Op.getOperand(0); | |||
35740 | APInt ShiftVal = Op.getConstantOperandAPInt(1); | |||
35741 | if (ShiftVal.uge(VTBits - 1)) | |||
35742 | return VTBits; // Sign splat. | |||
35743 | unsigned Tmp = DAG.ComputeNumSignBits(Src, DemandedElts, Depth + 1); | |||
35744 | ShiftVal += Tmp; | |||
35745 | return ShiftVal.uge(VTBits) ? VTBits : ShiftVal.getZExtValue(); | |||
35746 | } | |||
35747 | ||||
35748 | case X86ISD::FSETCC: | |||
35749 | // cmpss/cmpsd return zero/all-bits result values in the bottom element. | |||
35750 | if (VT == MVT::f32 || VT == MVT::f64 || | |||
35751 | ((VT == MVT::v4f32 || VT == MVT::v2f64) && DemandedElts == 1)) | |||
35752 | return VTBits; | |||
35753 | break; | |||
35754 | ||||
35755 | case X86ISD::PCMPGT: | |||
35756 | case X86ISD::PCMPEQ: | |||
35757 | case X86ISD::CMPP: | |||
35758 | case X86ISD::VPCOM: | |||
35759 | case X86ISD::VPCOMU: | |||
35760 | // Vector compares return zero/all-bits result values. | |||
35761 | return VTBits; | |||
35762 | ||||
35763 | case X86ISD::ANDNP: { | |||
35764 | unsigned Tmp0 = | |||
35765 | DAG.ComputeNumSignBits(Op.getOperand(0), DemandedElts, Depth + 1); | |||
35766 | if (Tmp0 == 1) return 1; // Early out. | |||
35767 | unsigned Tmp1 = | |||
35768 | DAG.ComputeNumSignBits(Op.getOperand(1), DemandedElts, Depth + 1); | |||
35769 | return std::min(Tmp0, Tmp1); | |||
35770 | } | |||
35771 | ||||
35772 | case X86ISD::CMOV: { | |||
35773 | unsigned Tmp0 = DAG.ComputeNumSignBits(Op.getOperand(0), Depth+1); | |||
35774 | if (Tmp0 == 1) return 1; // Early out. | |||
35775 | unsigned Tmp1 = DAG.ComputeNumSignBits(Op.getOperand(1), Depth+1); | |||
35776 | return std::min(Tmp0, Tmp1); | |||
35777 | } | |||
35778 | } | |||
35779 | ||||
35780 | // Handle target shuffles. | |||
35781 | // TODO - use resolveTargetShuffleInputs once we can limit recursive depth. | |||
35782 | if (isTargetShuffle(Opcode)) { | |||
35783 | SmallVector<int, 64> Mask; | |||
35784 | SmallVector<SDValue, 2> Ops; | |||
35785 | if (getTargetShuffleMask(Op.getNode(), VT.getSimpleVT(), true, Ops, Mask)) { | |||
35786 | unsigned NumOps = Ops.size(); | |||
35787 | unsigned NumElts = VT.getVectorNumElements(); | |||
35788 | if (Mask.size() == NumElts) { | |||
35789 | SmallVector<APInt, 2> DemandedOps(NumOps, APInt(NumElts, 0)); | |||
35790 | for (unsigned i = 0; i != NumElts; ++i) { | |||
35791 | if (!DemandedElts[i]) | |||
35792 | continue; | |||
35793 | int M = Mask[i]; | |||
35794 | if (M == SM_SentinelUndef) { | |||
35795 | // For UNDEF elements, we don't know anything about the common state | |||
35796 | // of the shuffle result. | |||
35797 | return 1; | |||
35798 | } else if (M == SM_SentinelZero) { | |||
35799 | // Zero = all sign bits. | |||
35800 | continue; | |||
35801 | } | |||
35802 | assert(0 <= M && (unsigned)M < (NumOps * NumElts) &&(static_cast <bool> (0 <= M && (unsigned)M < (NumOps * NumElts) && "Shuffle index out of range") ? void (0) : __assert_fail ("0 <= M && (unsigned)M < (NumOps * NumElts) && \"Shuffle index out of range\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 35803, __extension__ __PRETTY_FUNCTION__)) | |||
35803 | "Shuffle index out of range")(static_cast <bool> (0 <= M && (unsigned)M < (NumOps * NumElts) && "Shuffle index out of range") ? void (0) : __assert_fail ("0 <= M && (unsigned)M < (NumOps * NumElts) && \"Shuffle index out of range\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 35803, __extension__ __PRETTY_FUNCTION__)); | |||
35804 | ||||
35805 | unsigned OpIdx = (unsigned)M / NumElts; | |||
35806 | unsigned EltIdx = (unsigned)M % NumElts; | |||
35807 | if (Ops[OpIdx].getValueType() != VT) { | |||
35808 | // TODO - handle target shuffle ops with different value types. | |||
35809 | return 1; | |||
35810 | } | |||
35811 | DemandedOps[OpIdx].setBit(EltIdx); | |||
35812 | } | |||
35813 | unsigned Tmp0 = VTBits; | |||
35814 | for (unsigned i = 0; i != NumOps && Tmp0 > 1; ++i) { | |||
35815 | if (!DemandedOps[i]) | |||
35816 | continue; | |||
35817 | unsigned Tmp1 = | |||
35818 | DAG.ComputeNumSignBits(Ops[i], DemandedOps[i], Depth + 1); | |||
35819 | Tmp0 = std::min(Tmp0, Tmp1); | |||
35820 | } | |||
35821 | return Tmp0; | |||
35822 | } | |||
35823 | } | |||
35824 | } | |||
35825 | ||||
35826 | // Fallback case. | |||
35827 | return 1; | |||
35828 | } | |||
35829 | ||||
35830 | SDValue X86TargetLowering::unwrapAddress(SDValue N) const { | |||
35831 | if (N->getOpcode() == X86ISD::Wrapper || N->getOpcode() == X86ISD::WrapperRIP) | |||
35832 | return N->getOperand(0); | |||
35833 | return N; | |||
35834 | } | |||
35835 | ||||
35836 | // Helper to look for a normal load that can be narrowed into a vzload with the | |||
35837 | // specified VT and memory VT. Returns SDValue() on failure. | |||
35838 | static SDValue narrowLoadToVZLoad(LoadSDNode *LN, MVT MemVT, MVT VT, | |||
35839 | SelectionDAG &DAG) { | |||
35840 | // Can't if the load is volatile or atomic. | |||
35841 | if (!LN->isSimple()) | |||
35842 | return SDValue(); | |||
35843 | ||||
35844 | SDVTList Tys = DAG.getVTList(VT, MVT::Other); | |||
35845 | SDValue Ops[] = {LN->getChain(), LN->getBasePtr()}; | |||
35846 | return DAG.getMemIntrinsicNode(X86ISD::VZEXT_LOAD, SDLoc(LN), Tys, Ops, MemVT, | |||
35847 | LN->getPointerInfo(), LN->getOriginalAlign(), | |||
35848 | LN->getMemOperand()->getFlags()); | |||
35849 | } | |||
35850 | ||||
35851 | // Attempt to match a combined shuffle mask against supported unary shuffle | |||
35852 | // instructions. | |||
35853 | // TODO: Investigate sharing more of this with shuffle lowering. | |||
35854 | static bool matchUnaryShuffle(MVT MaskVT, ArrayRef<int> Mask, | |||
35855 | bool AllowFloatDomain, bool AllowIntDomain, | |||
35856 | SDValue &V1, const SDLoc &DL, SelectionDAG &DAG, | |||
35857 | const X86Subtarget &Subtarget, unsigned &Shuffle, | |||
35858 | MVT &SrcVT, MVT &DstVT) { | |||
35859 | unsigned NumMaskElts = Mask.size(); | |||
35860 | unsigned MaskEltSize = MaskVT.getScalarSizeInBits(); | |||
35861 | ||||
35862 | // Match against a VZEXT_MOVL vXi32 and vXi16 zero-extending instruction. | |||
35863 | if (Mask[0] == 0 && | |||
35864 | (MaskEltSize == 32 || (MaskEltSize == 16 && Subtarget.hasFP16()))) { | |||
35865 | if ((isUndefOrZero(Mask[1]) && isUndefInRange(Mask, 2, NumMaskElts - 2)) || | |||
35866 | (V1.getOpcode() == ISD::SCALAR_TO_VECTOR && | |||
35867 | isUndefOrZeroInRange(Mask, 1, NumMaskElts - 1))) { | |||
35868 | Shuffle = X86ISD::VZEXT_MOVL; | |||
35869 | SrcVT = DstVT = | |||
35870 | !Subtarget.hasSSE2() && MaskEltSize == 32 ? MVT::v4f32 : MaskVT; | |||
35871 | return true; | |||
35872 | } | |||
35873 | } | |||
35874 | ||||
35875 | // Match against a ANY/ZERO_EXTEND_VECTOR_INREG instruction. | |||
35876 | // TODO: Add 512-bit vector support (split AVX512F and AVX512BW). | |||
35877 | if (AllowIntDomain && ((MaskVT.is128BitVector() && Subtarget.hasSSE41()) || | |||
35878 | (MaskVT.is256BitVector() && Subtarget.hasInt256()))) { | |||
35879 | unsigned MaxScale = 64 / MaskEltSize; | |||
35880 | for (unsigned Scale = 2; Scale <= MaxScale; Scale *= 2) { | |||
35881 | bool MatchAny = true; | |||
35882 | bool MatchZero = true; | |||
35883 | unsigned NumDstElts = NumMaskElts / Scale; | |||
35884 | for (unsigned i = 0; i != NumDstElts && (MatchAny || MatchZero); ++i) { | |||
35885 | if (!isUndefOrEqual(Mask[i * Scale], (int)i)) { | |||
35886 | MatchAny = MatchZero = false; | |||
35887 | break; | |||
35888 | } | |||
35889 | MatchAny &= isUndefInRange(Mask, (i * Scale) + 1, Scale - 1); | |||
35890 | MatchZero &= isUndefOrZeroInRange(Mask, (i * Scale) + 1, Scale - 1); | |||
35891 | } | |||
35892 | if (MatchAny || MatchZero) { | |||
35893 | assert(MatchZero && "Failed to match zext but matched aext?")(static_cast <bool> (MatchZero && "Failed to match zext but matched aext?" ) ? void (0) : __assert_fail ("MatchZero && \"Failed to match zext but matched aext?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 35893, __extension__ __PRETTY_FUNCTION__)); | |||
35894 | unsigned SrcSize = std::max(128u, NumDstElts * MaskEltSize); | |||
35895 | MVT ScalarTy = MaskVT.isInteger() ? MaskVT.getScalarType() : | |||
35896 | MVT::getIntegerVT(MaskEltSize); | |||
35897 | SrcVT = MVT::getVectorVT(ScalarTy, SrcSize / MaskEltSize); | |||
35898 | ||||
35899 | if (SrcVT.getSizeInBits() != MaskVT.getSizeInBits()) | |||
35900 | V1 = extractSubVector(V1, 0, DAG, DL, SrcSize); | |||
35901 | ||||
35902 | Shuffle = unsigned(MatchAny ? ISD::ANY_EXTEND : ISD::ZERO_EXTEND); | |||
35903 | if (SrcVT.getVectorNumElements() != NumDstElts) | |||
35904 | Shuffle = getOpcode_EXTEND_VECTOR_INREG(Shuffle); | |||
35905 | ||||
35906 | DstVT = MVT::getIntegerVT(Scale * MaskEltSize); | |||
35907 | DstVT = MVT::getVectorVT(DstVT, NumDstElts); | |||
35908 | return true; | |||
35909 | } | |||
35910 | } | |||
35911 | } | |||
35912 | ||||
35913 | // Match against a VZEXT_MOVL instruction, SSE1 only supports 32-bits (MOVSS). | |||
35914 | if (((MaskEltSize == 32) || (MaskEltSize == 64 && Subtarget.hasSSE2())) && | |||
35915 | isUndefOrEqual(Mask[0], 0) && | |||
35916 | isUndefOrZeroInRange(Mask, 1, NumMaskElts - 1)) { | |||
35917 | Shuffle = X86ISD::VZEXT_MOVL; | |||
35918 | SrcVT = DstVT = !Subtarget.hasSSE2() ? MVT::v4f32 : MaskVT; | |||
35919 | return true; | |||
35920 | } | |||
35921 | ||||
35922 | // Check if we have SSE3 which will let us use MOVDDUP etc. The | |||
35923 | // instructions are no slower than UNPCKLPD but has the option to | |||
35924 | // fold the input operand into even an unaligned memory load. | |||
35925 | if (MaskVT.is128BitVector() && Subtarget.hasSSE3() && AllowFloatDomain) { | |||
35926 | if (isTargetShuffleEquivalent(MaskVT, Mask, {0, 0}, V1)) { | |||
35927 | Shuffle = X86ISD::MOVDDUP; | |||
35928 | SrcVT = DstVT = MVT::v2f64; | |||
35929 | return true; | |||
35930 | } | |||
35931 | if (isTargetShuffleEquivalent(MaskVT, Mask, {0, 0, 2, 2}, V1)) { | |||
35932 | Shuffle = X86ISD::MOVSLDUP; | |||
35933 | SrcVT = DstVT = MVT::v4f32; | |||
35934 | return true; | |||
35935 | } | |||
35936 | if (isTargetShuffleEquivalent(MaskVT, Mask, {1, 1, 3, 3}, V1)) { | |||
35937 | Shuffle = X86ISD::MOVSHDUP; | |||
35938 | SrcVT = DstVT = MVT::v4f32; | |||
35939 | return true; | |||
35940 | } | |||
35941 | } | |||
35942 | ||||
35943 | if (MaskVT.is256BitVector() && AllowFloatDomain) { | |||
35944 | assert(Subtarget.hasAVX() && "AVX required for 256-bit vector shuffles")(static_cast <bool> (Subtarget.hasAVX() && "AVX required for 256-bit vector shuffles" ) ? void (0) : __assert_fail ("Subtarget.hasAVX() && \"AVX required for 256-bit vector shuffles\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 35944, __extension__ __PRETTY_FUNCTION__)); | |||
35945 | if (isTargetShuffleEquivalent(MaskVT, Mask, {0, 0, 2, 2}, V1)) { | |||
35946 | Shuffle = X86ISD::MOVDDUP; | |||
35947 | SrcVT = DstVT = MVT::v4f64; | |||
35948 | return true; | |||
35949 | } | |||
35950 | if (isTargetShuffleEquivalent(MaskVT, Mask, {0, 0, 2, 2, 4, 4, 6, 6}, V1)) { | |||
35951 | Shuffle = X86ISD::MOVSLDUP; | |||
35952 | SrcVT = DstVT = MVT::v8f32; | |||
35953 | return true; | |||
35954 | } | |||
35955 | if (isTargetShuffleEquivalent(MaskVT, Mask, {1, 1, 3, 3, 5, 5, 7, 7}, V1)) { | |||
35956 | Shuffle = X86ISD::MOVSHDUP; | |||
35957 | SrcVT = DstVT = MVT::v8f32; | |||
35958 | return true; | |||
35959 | } | |||
35960 | } | |||
35961 | ||||
35962 | if (MaskVT.is512BitVector() && AllowFloatDomain) { | |||
35963 | assert(Subtarget.hasAVX512() &&(static_cast <bool> (Subtarget.hasAVX512() && "AVX512 required for 512-bit vector shuffles" ) ? void (0) : __assert_fail ("Subtarget.hasAVX512() && \"AVX512 required for 512-bit vector shuffles\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 35964, __extension__ __PRETTY_FUNCTION__)) | |||
35964 | "AVX512 required for 512-bit vector shuffles")(static_cast <bool> (Subtarget.hasAVX512() && "AVX512 required for 512-bit vector shuffles" ) ? void (0) : __assert_fail ("Subtarget.hasAVX512() && \"AVX512 required for 512-bit vector shuffles\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 35964, __extension__ __PRETTY_FUNCTION__)); | |||
35965 | if (isTargetShuffleEquivalent(MaskVT, Mask, {0, 0, 2, 2, 4, 4, 6, 6}, V1)) { | |||
35966 | Shuffle = X86ISD::MOVDDUP; | |||
35967 | SrcVT = DstVT = MVT::v8f64; | |||
35968 | return true; | |||
35969 | } | |||
35970 | if (isTargetShuffleEquivalent( | |||
35971 | MaskVT, Mask, | |||
35972 | {0, 0, 2, 2, 4, 4, 6, 6, 8, 8, 10, 10, 12, 12, 14, 14}, V1)) { | |||
35973 | Shuffle = X86ISD::MOVSLDUP; | |||
35974 | SrcVT = DstVT = MVT::v16f32; | |||
35975 | return true; | |||
35976 | } | |||
35977 | if (isTargetShuffleEquivalent( | |||
35978 | MaskVT, Mask, | |||
35979 | {1, 1, 3, 3, 5, 5, 7, 7, 9, 9, 11, 11, 13, 13, 15, 15}, V1)) { | |||
35980 | Shuffle = X86ISD::MOVSHDUP; | |||
35981 | SrcVT = DstVT = MVT::v16f32; | |||
35982 | return true; | |||
35983 | } | |||
35984 | } | |||
35985 | ||||
35986 | return false; | |||
35987 | } | |||
35988 | ||||
35989 | // Attempt to match a combined shuffle mask against supported unary immediate | |||
35990 | // permute instructions. | |||
35991 | // TODO: Investigate sharing more of this with shuffle lowering. | |||
35992 | static bool matchUnaryPermuteShuffle(MVT MaskVT, ArrayRef<int> Mask, | |||
35993 | const APInt &Zeroable, | |||
35994 | bool AllowFloatDomain, bool AllowIntDomain, | |||
35995 | const X86Subtarget &Subtarget, | |||
35996 | unsigned &Shuffle, MVT &ShuffleVT, | |||
35997 | unsigned &PermuteImm) { | |||
35998 | unsigned NumMaskElts = Mask.size(); | |||
35999 | unsigned InputSizeInBits = MaskVT.getSizeInBits(); | |||
36000 | unsigned MaskScalarSizeInBits = InputSizeInBits / NumMaskElts; | |||
36001 | MVT MaskEltVT = MVT::getIntegerVT(MaskScalarSizeInBits); | |||
36002 | bool ContainsZeros = isAnyZero(Mask); | |||
36003 | ||||
36004 | // Handle VPERMI/VPERMILPD vXi64/vXi64 patterns. | |||
36005 | if (!ContainsZeros && MaskScalarSizeInBits == 64) { | |||
36006 | // Check for lane crossing permutes. | |||
36007 | if (is128BitLaneCrossingShuffleMask(MaskEltVT, Mask)) { | |||
36008 | // PERMPD/PERMQ permutes within a 256-bit vector (AVX2+). | |||
36009 | if (Subtarget.hasAVX2() && MaskVT.is256BitVector()) { | |||
36010 | Shuffle = X86ISD::VPERMI; | |||
36011 | ShuffleVT = (AllowFloatDomain ? MVT::v4f64 : MVT::v4i64); | |||
36012 | PermuteImm = getV4X86ShuffleImm(Mask); | |||
36013 | return true; | |||
36014 | } | |||
36015 | if (Subtarget.hasAVX512() && MaskVT.is512BitVector()) { | |||
36016 | SmallVector<int, 4> RepeatedMask; | |||
36017 | if (is256BitLaneRepeatedShuffleMask(MVT::v8f64, Mask, RepeatedMask)) { | |||
36018 | Shuffle = X86ISD::VPERMI; | |||
36019 | ShuffleVT = (AllowFloatDomain ? MVT::v8f64 : MVT::v8i64); | |||
36020 | PermuteImm = getV4X86ShuffleImm(RepeatedMask); | |||
36021 | return true; | |||
36022 | } | |||
36023 | } | |||
36024 | } else if (AllowFloatDomain && Subtarget.hasAVX()) { | |||
36025 | // VPERMILPD can permute with a non-repeating shuffle. | |||
36026 | Shuffle = X86ISD::VPERMILPI; | |||
36027 | ShuffleVT = MVT::getVectorVT(MVT::f64, Mask.size()); | |||
36028 | PermuteImm = 0; | |||
36029 | for (int i = 0, e = Mask.size(); i != e; ++i) { | |||
36030 | int M = Mask[i]; | |||
36031 | if (M == SM_SentinelUndef) | |||
36032 | continue; | |||
36033 | assert(((M / 2) == (i / 2)) && "Out of range shuffle mask index")(static_cast <bool> (((M / 2) == (i / 2)) && "Out of range shuffle mask index" ) ? void (0) : __assert_fail ("((M / 2) == (i / 2)) && \"Out of range shuffle mask index\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 36033, __extension__ __PRETTY_FUNCTION__)); | |||
36034 | PermuteImm |= (M & 1) << i; | |||
36035 | } | |||
36036 | return true; | |||
36037 | } | |||
36038 | } | |||
36039 | ||||
36040 | // Handle PSHUFD/VPERMILPI vXi32/vXf32 repeated patterns. | |||
36041 | // AVX introduced the VPERMILPD/VPERMILPS float permutes, before then we | |||
36042 | // had to use 2-input SHUFPD/SHUFPS shuffles (not handled here). | |||
36043 | if ((MaskScalarSizeInBits == 64 || MaskScalarSizeInBits == 32) && | |||
36044 | !ContainsZeros && (AllowIntDomain || Subtarget.hasAVX())) { | |||
36045 | SmallVector<int, 4> RepeatedMask; | |||
36046 | if (is128BitLaneRepeatedShuffleMask(MaskEltVT, Mask, RepeatedMask)) { | |||
36047 | // Narrow the repeated mask to create 32-bit element permutes. | |||
36048 | SmallVector<int, 4> WordMask = RepeatedMask; | |||
36049 | if (MaskScalarSizeInBits == 64) | |||
36050 | narrowShuffleMaskElts(2, RepeatedMask, WordMask); | |||
36051 | ||||
36052 | Shuffle = (AllowIntDomain ? X86ISD::PSHUFD : X86ISD::VPERMILPI); | |||
36053 | ShuffleVT = (AllowIntDomain ? MVT::i32 : MVT::f32); | |||
36054 | ShuffleVT = MVT::getVectorVT(ShuffleVT, InputSizeInBits / 32); | |||
36055 | PermuteImm = getV4X86ShuffleImm(WordMask); | |||
36056 | return true; | |||
36057 | } | |||
36058 | } | |||
36059 | ||||
36060 | // Handle PSHUFLW/PSHUFHW vXi16 repeated patterns. | |||
36061 | if (!ContainsZeros && AllowIntDomain && MaskScalarSizeInBits == 16 && | |||
36062 | ((MaskVT.is128BitVector() && Subtarget.hasSSE2()) || | |||
36063 | (MaskVT.is256BitVector() && Subtarget.hasAVX2()) || | |||
36064 | (MaskVT.is512BitVector() && Subtarget.hasBWI()))) { | |||
36065 | SmallVector<int, 4> RepeatedMask; | |||
36066 | if (is128BitLaneRepeatedShuffleMask(MaskEltVT, Mask, RepeatedMask)) { | |||
36067 | ArrayRef<int> LoMask(RepeatedMask.data() + 0, 4); | |||
36068 | ArrayRef<int> HiMask(RepeatedMask.data() + 4, 4); | |||
36069 | ||||
36070 | // PSHUFLW: permute lower 4 elements only. | |||
36071 | if (isUndefOrInRange(LoMask, 0, 4) && | |||
36072 | isSequentialOrUndefInRange(HiMask, 0, 4, 4)) { | |||
36073 | Shuffle = X86ISD::PSHUFLW; | |||
36074 | ShuffleVT = MVT::getVectorVT(MVT::i16, InputSizeInBits / 16); | |||
36075 | PermuteImm = getV4X86ShuffleImm(LoMask); | |||
36076 | return true; | |||
36077 | } | |||
36078 | ||||
36079 | // PSHUFHW: permute upper 4 elements only. | |||
36080 | if (isUndefOrInRange(HiMask, 4, 8) && | |||
36081 | isSequentialOrUndefInRange(LoMask, 0, 4, 0)) { | |||
36082 | // Offset the HiMask so that we can create the shuffle immediate. | |||
36083 | int OffsetHiMask[4]; | |||
36084 | for (int i = 0; i != 4; ++i) | |||
36085 | OffsetHiMask[i] = (HiMask[i] < 0 ? HiMask[i] : HiMask[i] - 4); | |||
36086 | ||||
36087 | Shuffle = X86ISD::PSHUFHW; | |||
36088 | ShuffleVT = MVT::getVectorVT(MVT::i16, InputSizeInBits / 16); | |||
36089 | PermuteImm = getV4X86ShuffleImm(OffsetHiMask); | |||
36090 | return true; | |||
36091 | } | |||
36092 | } | |||
36093 | } | |||
36094 | ||||
36095 | // Attempt to match against byte/bit shifts. | |||
36096 | if (AllowIntDomain && | |||
36097 | ((MaskVT.is128BitVector() && Subtarget.hasSSE2()) || | |||
36098 | (MaskVT.is256BitVector() && Subtarget.hasAVX2()) || | |||
36099 | (MaskVT.is512BitVector() && Subtarget.hasAVX512()))) { | |||
36100 | int ShiftAmt = matchShuffleAsShift(ShuffleVT, Shuffle, MaskScalarSizeInBits, | |||
36101 | Mask, 0, Zeroable, Subtarget); | |||
36102 | if (0 < ShiftAmt && (!ShuffleVT.is512BitVector() || Subtarget.hasBWI() || | |||
36103 | 32 <= ShuffleVT.getScalarSizeInBits())) { | |||
36104 | PermuteImm = (unsigned)ShiftAmt; | |||
36105 | return true; | |||
36106 | } | |||
36107 | } | |||
36108 | ||||
36109 | // Attempt to match against bit rotates. | |||
36110 | if (!ContainsZeros && AllowIntDomain && MaskScalarSizeInBits < 64 && | |||
36111 | ((MaskVT.is128BitVector() && Subtarget.hasXOP()) || | |||
36112 | Subtarget.hasAVX512())) { | |||
36113 | int RotateAmt = matchShuffleAsBitRotate(ShuffleVT, MaskScalarSizeInBits, | |||
36114 | Subtarget, Mask); | |||
36115 | if (0 < RotateAmt) { | |||
36116 | Shuffle = X86ISD::VROTLI; | |||
36117 | PermuteImm = (unsigned)RotateAmt; | |||
36118 | return true; | |||
36119 | } | |||
36120 | } | |||
36121 | ||||
36122 | return false; | |||
36123 | } | |||
36124 | ||||
36125 | // Attempt to match a combined unary shuffle mask against supported binary | |||
36126 | // shuffle instructions. | |||
36127 | // TODO: Investigate sharing more of this with shuffle lowering. | |||
36128 | static bool matchBinaryShuffle(MVT MaskVT, ArrayRef<int> Mask, | |||
36129 | bool AllowFloatDomain, bool AllowIntDomain, | |||
36130 | SDValue &V1, SDValue &V2, const SDLoc &DL, | |||
36131 | SelectionDAG &DAG, const X86Subtarget &Subtarget, | |||
36132 | unsigned &Shuffle, MVT &SrcVT, MVT &DstVT, | |||
36133 | bool IsUnary) { | |||
36134 | unsigned NumMaskElts = Mask.size(); | |||
36135 | unsigned EltSizeInBits = MaskVT.getScalarSizeInBits(); | |||
36136 | ||||
36137 | if (MaskVT.is128BitVector()) { | |||
36138 | if (isTargetShuffleEquivalent(MaskVT, Mask, {0, 0}) && AllowFloatDomain) { | |||
36139 | V2 = V1; | |||
36140 | V1 = (SM_SentinelUndef == Mask[0] ? DAG.getUNDEF(MVT::v4f32) : V1); | |||
36141 | Shuffle = Subtarget.hasSSE2() ? X86ISD::UNPCKL : X86ISD::MOVLHPS; | |||
36142 | SrcVT = DstVT = Subtarget.hasSSE2() ? MVT::v2f64 : MVT::v4f32; | |||
36143 | return true; | |||
36144 | } | |||
36145 | if (isTargetShuffleEquivalent(MaskVT, Mask, {1, 1}) && AllowFloatDomain) { | |||
36146 | V2 = V1; | |||
36147 | Shuffle = Subtarget.hasSSE2() ? X86ISD::UNPCKH : X86ISD::MOVHLPS; | |||
36148 | SrcVT = DstVT = Subtarget.hasSSE2() ? MVT::v2f64 : MVT::v4f32; | |||
36149 | return true; | |||
36150 | } | |||
36151 | if (isTargetShuffleEquivalent(MaskVT, Mask, {0, 3}) && | |||
36152 | Subtarget.hasSSE2() && (AllowFloatDomain || !Subtarget.hasSSE41())) { | |||
36153 | std::swap(V1, V2); | |||
36154 | Shuffle = X86ISD::MOVSD; | |||
36155 | SrcVT = DstVT = MVT::v2f64; | |||
36156 | return true; | |||
36157 | } | |||
36158 | if (isTargetShuffleEquivalent(MaskVT, Mask, {4, 1, 2, 3}) && | |||
36159 | (AllowFloatDomain || !Subtarget.hasSSE41())) { | |||
36160 | Shuffle = X86ISD::MOVSS; | |||
36161 | SrcVT = DstVT = MVT::v4f32; | |||
36162 | return true; | |||
36163 | } | |||
36164 | if (isTargetShuffleEquivalent(MaskVT, Mask, {8, 1, 2, 3, 4, 5, 6, 7}) && | |||
36165 | Subtarget.hasFP16()) { | |||
36166 | Shuffle = X86ISD::MOVSH; | |||
36167 | SrcVT = DstVT = MVT::v8f16; | |||
36168 | return true; | |||
36169 | } | |||
36170 | } | |||
36171 | ||||
36172 | // Attempt to match against either an unary or binary PACKSS/PACKUS shuffle. | |||
36173 | if (((MaskVT == MVT::v8i16 || MaskVT == MVT::v16i8) && Subtarget.hasSSE2()) || | |||
36174 | ((MaskVT == MVT::v16i16 || MaskVT == MVT::v32i8) && Subtarget.hasInt256()) || | |||
36175 | ((MaskVT == MVT::v32i16 || MaskVT == MVT::v64i8) && Subtarget.hasBWI())) { | |||
36176 | if (matchShuffleWithPACK(MaskVT, SrcVT, V1, V2, Shuffle, Mask, DAG, | |||
36177 | Subtarget)) { | |||
36178 | DstVT = MaskVT; | |||
36179 | return true; | |||
36180 | } | |||
36181 | } | |||
36182 | ||||
36183 | // Attempt to match against either a unary or binary UNPCKL/UNPCKH shuffle. | |||
36184 | if ((MaskVT == MVT::v4f32 && Subtarget.hasSSE1()) || | |||
36185 | (MaskVT.is128BitVector() && Subtarget.hasSSE2()) || | |||
36186 | (MaskVT.is256BitVector() && 32 <= EltSizeInBits && Subtarget.hasAVX()) || | |||
36187 | (MaskVT.is256BitVector() && Subtarget.hasAVX2()) || | |||
36188 | (MaskVT.is512BitVector() && Subtarget.hasAVX512())) { | |||
36189 | if (matchShuffleWithUNPCK(MaskVT, V1, V2, Shuffle, IsUnary, Mask, DL, DAG, | |||
36190 | Subtarget)) { | |||
36191 | SrcVT = DstVT = MaskVT; | |||
36192 | if (MaskVT.is256BitVector() && !Subtarget.hasAVX2()) | |||
36193 | SrcVT = DstVT = (32 == EltSizeInBits ? MVT::v8f32 : MVT::v4f64); | |||
36194 | return true; | |||
36195 | } | |||
36196 | } | |||
36197 | ||||
36198 | // Attempt to match against a OR if we're performing a blend shuffle and the | |||
36199 | // non-blended source element is zero in each case. | |||
36200 | if ((EltSizeInBits % V1.getScalarValueSizeInBits()) == 0 && | |||
36201 | (EltSizeInBits % V2.getScalarValueSizeInBits()) == 0) { | |||
36202 | bool IsBlend = true; | |||
36203 | unsigned NumV1Elts = V1.getValueType().getVectorNumElements(); | |||
36204 | unsigned NumV2Elts = V2.getValueType().getVectorNumElements(); | |||
36205 | unsigned Scale1 = NumV1Elts / NumMaskElts; | |||
36206 | unsigned Scale2 = NumV2Elts / NumMaskElts; | |||
36207 | APInt DemandedZeroV1 = APInt::getNullValue(NumV1Elts); | |||
36208 | APInt DemandedZeroV2 = APInt::getNullValue(NumV2Elts); | |||
36209 | for (unsigned i = 0; i != NumMaskElts; ++i) { | |||
36210 | int M = Mask[i]; | |||
36211 | if (M == SM_SentinelUndef) | |||
36212 | continue; | |||
36213 | if (M == SM_SentinelZero) { | |||
36214 | DemandedZeroV1.setBits(i * Scale1, (i + 1) * Scale1); | |||
36215 | DemandedZeroV2.setBits(i * Scale2, (i + 1) * Scale2); | |||
36216 | continue; | |||
36217 | } | |||
36218 | if (M == (int)i) { | |||
36219 | DemandedZeroV2.setBits(i * Scale2, (i + 1) * Scale2); | |||
36220 | continue; | |||
36221 | } | |||
36222 | if (M == (int)(i + NumMaskElts)) { | |||
36223 | DemandedZeroV1.setBits(i * Scale1, (i + 1) * Scale1); | |||
36224 | continue; | |||
36225 | } | |||
36226 | IsBlend = false; | |||
36227 | break; | |||
36228 | } | |||
36229 | if (IsBlend && | |||
36230 | DAG.computeKnownBits(V1, DemandedZeroV1).isZero() && | |||
36231 | DAG.computeKnownBits(V2, DemandedZeroV2).isZero()) { | |||
36232 | Shuffle = ISD::OR; | |||
36233 | SrcVT = DstVT = MaskVT.changeTypeToInteger(); | |||
36234 | return true; | |||
36235 | } | |||
36236 | } | |||
36237 | ||||
36238 | return false; | |||
36239 | } | |||
36240 | ||||
36241 | static bool matchBinaryPermuteShuffle( | |||
36242 | MVT MaskVT, ArrayRef<int> Mask, const APInt &Zeroable, | |||
36243 | bool AllowFloatDomain, bool AllowIntDomain, SDValue &V1, SDValue &V2, | |||
36244 | const SDLoc &DL, SelectionDAG &DAG, const X86Subtarget &Subtarget, | |||
36245 | unsigned &Shuffle, MVT &ShuffleVT, unsigned &PermuteImm) { | |||
36246 | unsigned NumMaskElts = Mask.size(); | |||
36247 | unsigned EltSizeInBits = MaskVT.getScalarSizeInBits(); | |||
36248 | ||||
36249 | // Attempt to match against VALIGND/VALIGNQ rotate. | |||
36250 | if (AllowIntDomain && (EltSizeInBits == 64 || EltSizeInBits == 32) && | |||
36251 | ((MaskVT.is128BitVector() && Subtarget.hasVLX()) || | |||
36252 | (MaskVT.is256BitVector() && Subtarget.hasVLX()) || | |||
36253 | (MaskVT.is512BitVector() && Subtarget.hasAVX512()))) { | |||
36254 | if (!isAnyZero(Mask)) { | |||
36255 | int Rotation = matchShuffleAsElementRotate(V1, V2, Mask); | |||
36256 | if (0 < Rotation) { | |||
36257 | Shuffle = X86ISD::VALIGN; | |||
36258 | if (EltSizeInBits == 64) | |||
36259 | ShuffleVT = MVT::getVectorVT(MVT::i64, MaskVT.getSizeInBits() / 64); | |||
36260 | else | |||
36261 | ShuffleVT = MVT::getVectorVT(MVT::i32, MaskVT.getSizeInBits() / 32); | |||
36262 | PermuteImm = Rotation; | |||
36263 | return true; | |||
36264 | } | |||
36265 | } | |||
36266 | } | |||
36267 | ||||
36268 | // Attempt to match against PALIGNR byte rotate. | |||
36269 | if (AllowIntDomain && ((MaskVT.is128BitVector() && Subtarget.hasSSSE3()) || | |||
36270 | (MaskVT.is256BitVector() && Subtarget.hasAVX2()) || | |||
36271 | (MaskVT.is512BitVector() && Subtarget.hasBWI()))) { | |||
36272 | int ByteRotation = matchShuffleAsByteRotate(MaskVT, V1, V2, Mask); | |||
36273 | if (0 < ByteRotation) { | |||
36274 | Shuffle = X86ISD::PALIGNR; | |||
36275 | ShuffleVT = MVT::getVectorVT(MVT::i8, MaskVT.getSizeInBits() / 8); | |||
36276 | PermuteImm = ByteRotation; | |||
36277 | return true; | |||
36278 | } | |||
36279 | } | |||
36280 | ||||
36281 | // Attempt to combine to X86ISD::BLENDI. | |||
36282 | if ((NumMaskElts <= 8 && ((Subtarget.hasSSE41() && MaskVT.is128BitVector()) || | |||
36283 | (Subtarget.hasAVX() && MaskVT.is256BitVector()))) || | |||
36284 | (MaskVT == MVT::v16i16 && Subtarget.hasAVX2())) { | |||
36285 | uint64_t BlendMask = 0; | |||
36286 | bool ForceV1Zero = false, ForceV2Zero = false; | |||
36287 | SmallVector<int, 8> TargetMask(Mask.begin(), Mask.end()); | |||
36288 | if (matchShuffleAsBlend(V1, V2, TargetMask, Zeroable, ForceV1Zero, | |||
36289 | ForceV2Zero, BlendMask)) { | |||
36290 | if (MaskVT == MVT::v16i16) { | |||
36291 | // We can only use v16i16 PBLENDW if the lanes are repeated. | |||
36292 | SmallVector<int, 8> RepeatedMask; | |||
36293 | if (isRepeatedTargetShuffleMask(128, MaskVT, TargetMask, | |||
36294 | RepeatedMask)) { | |||
36295 | assert(RepeatedMask.size() == 8 &&(static_cast <bool> (RepeatedMask.size() == 8 && "Repeated mask size doesn't match!") ? void (0) : __assert_fail ("RepeatedMask.size() == 8 && \"Repeated mask size doesn't match!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 36296, __extension__ __PRETTY_FUNCTION__)) | |||
36296 | "Repeated mask size doesn't match!")(static_cast <bool> (RepeatedMask.size() == 8 && "Repeated mask size doesn't match!") ? void (0) : __assert_fail ("RepeatedMask.size() == 8 && \"Repeated mask size doesn't match!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 36296, __extension__ __PRETTY_FUNCTION__)); | |||
36297 | PermuteImm = 0; | |||
36298 | for (int i = 0; i < 8; ++i) | |||
36299 | if (RepeatedMask[i] >= 8) | |||
36300 | PermuteImm |= 1 << i; | |||
36301 | V1 = ForceV1Zero ? getZeroVector(MaskVT, Subtarget, DAG, DL) : V1; | |||
36302 | V2 = ForceV2Zero ? getZeroVector(MaskVT, Subtarget, DAG, DL) : V2; | |||
36303 | Shuffle = X86ISD::BLENDI; | |||
36304 | ShuffleVT = MaskVT; | |||
36305 | return true; | |||
36306 | } | |||
36307 | } else { | |||
36308 | V1 = ForceV1Zero ? getZeroVector(MaskVT, Subtarget, DAG, DL) : V1; | |||
36309 | V2 = ForceV2Zero ? getZeroVector(MaskVT, Subtarget, DAG, DL) : V2; | |||
36310 | PermuteImm = (unsigned)BlendMask; | |||
36311 | Shuffle = X86ISD::BLENDI; | |||
36312 | ShuffleVT = MaskVT; | |||
36313 | return true; | |||
36314 | } | |||
36315 | } | |||
36316 | } | |||
36317 | ||||
36318 | // Attempt to combine to INSERTPS, but only if it has elements that need to | |||
36319 | // be set to zero. | |||
36320 | if (AllowFloatDomain && EltSizeInBits == 32 && Subtarget.hasSSE41() && | |||
36321 | MaskVT.is128BitVector() && isAnyZero(Mask) && | |||
36322 | matchShuffleAsInsertPS(V1, V2, PermuteImm, Zeroable, Mask, DAG)) { | |||
36323 | Shuffle = X86ISD::INSERTPS; | |||
36324 | ShuffleVT = MVT::v4f32; | |||
36325 | return true; | |||
36326 | } | |||
36327 | ||||
36328 | // Attempt to combine to SHUFPD. | |||
36329 | if (AllowFloatDomain && EltSizeInBits == 64 && | |||
36330 | ((MaskVT.is128BitVector() && Subtarget.hasSSE2()) || | |||
36331 | (MaskVT.is256BitVector() && Subtarget.hasAVX()) || | |||
36332 | (MaskVT.is512BitVector() && Subtarget.hasAVX512()))) { | |||
36333 | bool ForceV1Zero = false, ForceV2Zero = false; | |||
36334 | if (matchShuffleWithSHUFPD(MaskVT, V1, V2, ForceV1Zero, ForceV2Zero, | |||
36335 | PermuteImm, Mask, Zeroable)) { | |||
36336 | V1 = ForceV1Zero ? getZeroVector(MaskVT, Subtarget, DAG, DL) : V1; | |||
36337 | V2 = ForceV2Zero ? getZeroVector(MaskVT, Subtarget, DAG, DL) : V2; | |||
36338 | Shuffle = X86ISD::SHUFP; | |||
36339 | ShuffleVT = MVT::getVectorVT(MVT::f64, MaskVT.getSizeInBits() / 64); | |||
36340 | return true; | |||
36341 | } | |||
36342 | } | |||
36343 | ||||
36344 | // Attempt to combine to SHUFPS. | |||
36345 | if (AllowFloatDomain && EltSizeInBits == 32 && | |||
36346 | ((MaskVT.is128BitVector() && Subtarget.hasSSE1()) || | |||
36347 | (MaskVT.is256BitVector() && Subtarget.hasAVX()) || | |||
36348 | (MaskVT.is512BitVector() && Subtarget.hasAVX512()))) { | |||
36349 | SmallVector<int, 4> RepeatedMask; | |||
36350 | if (isRepeatedTargetShuffleMask(128, MaskVT, Mask, RepeatedMask)) { | |||
36351 | // Match each half of the repeated mask, to determine if its just | |||
36352 | // referencing one of the vectors, is zeroable or entirely undef. | |||
36353 | auto MatchHalf = [&](unsigned Offset, int &S0, int &S1) { | |||
36354 | int M0 = RepeatedMask[Offset]; | |||
36355 | int M1 = RepeatedMask[Offset + 1]; | |||
36356 | ||||
36357 | if (isUndefInRange(RepeatedMask, Offset, 2)) { | |||
36358 | return DAG.getUNDEF(MaskVT); | |||
36359 | } else if (isUndefOrZeroInRange(RepeatedMask, Offset, 2)) { | |||
36360 | S0 = (SM_SentinelUndef == M0 ? -1 : 0); | |||
36361 | S1 = (SM_SentinelUndef == M1 ? -1 : 1); | |||
36362 | return getZeroVector(MaskVT, Subtarget, DAG, DL); | |||
36363 | } else if (isUndefOrInRange(M0, 0, 4) && isUndefOrInRange(M1, 0, 4)) { | |||
36364 | S0 = (SM_SentinelUndef == M0 ? -1 : M0 & 3); | |||
36365 | S1 = (SM_SentinelUndef == M1 ? -1 : M1 & 3); | |||
36366 | return V1; | |||
36367 | } else if (isUndefOrInRange(M0, 4, 8) && isUndefOrInRange(M1, 4, 8)) { | |||
36368 | S0 = (SM_SentinelUndef == M0 ? -1 : M0 & 3); | |||
36369 | S1 = (SM_SentinelUndef == M1 ? -1 : M1 & 3); | |||
36370 | return V2; | |||
36371 | } | |||
36372 | ||||
36373 | return SDValue(); | |||
36374 | }; | |||
36375 | ||||
36376 | int ShufMask[4] = {-1, -1, -1, -1}; | |||
36377 | SDValue Lo = MatchHalf(0, ShufMask[0], ShufMask[1]); | |||
36378 | SDValue Hi = MatchHalf(2, ShufMask[2], ShufMask[3]); | |||
36379 | ||||
36380 | if (Lo && Hi) { | |||
36381 | V1 = Lo; | |||
36382 | V2 = Hi; | |||
36383 | Shuffle = X86ISD::SHUFP; | |||
36384 | ShuffleVT = MVT::getVectorVT(MVT::f32, MaskVT.getSizeInBits() / 32); | |||
36385 | PermuteImm = getV4X86ShuffleImm(ShufMask); | |||
36386 | return true; | |||
36387 | } | |||
36388 | } | |||
36389 | } | |||
36390 | ||||
36391 | // Attempt to combine to INSERTPS more generally if X86ISD::SHUFP failed. | |||
36392 | if (AllowFloatDomain && EltSizeInBits == 32 && Subtarget.hasSSE41() && | |||
36393 | MaskVT.is128BitVector() && | |||
36394 | matchShuffleAsInsertPS(V1, V2, PermuteImm, Zeroable, Mask, DAG)) { | |||
36395 | Shuffle = X86ISD::INSERTPS; | |||
36396 | ShuffleVT = MVT::v4f32; | |||
36397 | return true; | |||
36398 | } | |||
36399 | ||||
36400 | return false; | |||
36401 | } | |||
36402 | ||||
36403 | static SDValue combineX86ShuffleChainWithExtract( | |||
36404 | ArrayRef<SDValue> Inputs, SDValue Root, ArrayRef<int> BaseMask, int Depth, | |||
36405 | bool HasVariableMask, bool AllowVariableCrossLaneMask, | |||
36406 | bool AllowVariablePerLaneMask, SelectionDAG &DAG, | |||
36407 | const X86Subtarget &Subtarget); | |||
36408 | ||||
36409 | /// Combine an arbitrary chain of shuffles into a single instruction if | |||
36410 | /// possible. | |||
36411 | /// | |||
36412 | /// This is the leaf of the recursive combine below. When we have found some | |||
36413 | /// chain of single-use x86 shuffle instructions and accumulated the combined | |||
36414 | /// shuffle mask represented by them, this will try to pattern match that mask | |||
36415 | /// into either a single instruction if there is a special purpose instruction | |||
36416 | /// for this operation, or into a PSHUFB instruction which is a fully general | |||
36417 | /// instruction but should only be used to replace chains over a certain depth. | |||
36418 | static SDValue combineX86ShuffleChain(ArrayRef<SDValue> Inputs, SDValue Root, | |||
36419 | ArrayRef<int> BaseMask, int Depth, | |||
36420 | bool HasVariableMask, | |||
36421 | bool AllowVariableCrossLaneMask, | |||
36422 | bool AllowVariablePerLaneMask, | |||
36423 | SelectionDAG &DAG, | |||
36424 | const X86Subtarget &Subtarget) { | |||
36425 | assert(!BaseMask.empty() && "Cannot combine an empty shuffle mask!")(static_cast <bool> (!BaseMask.empty() && "Cannot combine an empty shuffle mask!" ) ? void (0) : __assert_fail ("!BaseMask.empty() && \"Cannot combine an empty shuffle mask!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 36425, __extension__ __PRETTY_FUNCTION__)); | |||
36426 | assert((Inputs.size() == 1 || Inputs.size() == 2) &&(static_cast <bool> ((Inputs.size() == 1 || Inputs.size () == 2) && "Unexpected number of shuffle inputs!") ? void (0) : __assert_fail ("(Inputs.size() == 1 || Inputs.size() == 2) && \"Unexpected number of shuffle inputs!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 36427, __extension__ __PRETTY_FUNCTION__)) | |||
36427 | "Unexpected number of shuffle inputs!")(static_cast <bool> ((Inputs.size() == 1 || Inputs.size () == 2) && "Unexpected number of shuffle inputs!") ? void (0) : __assert_fail ("(Inputs.size() == 1 || Inputs.size() == 2) && \"Unexpected number of shuffle inputs!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 36427, __extension__ __PRETTY_FUNCTION__)); | |||
36428 | ||||
36429 | MVT RootVT = Root.getSimpleValueType(); | |||
36430 | unsigned RootSizeInBits = RootVT.getSizeInBits(); | |||
36431 | unsigned NumRootElts = RootVT.getVectorNumElements(); | |||
36432 | ||||
36433 | // Canonicalize shuffle input op to the requested type. | |||
36434 | // TODO: Support cases where Op is smaller than VT. | |||
36435 | auto CanonicalizeShuffleInput = [&](MVT VT, SDValue Op) { | |||
36436 | return DAG.getBitcast(VT, Op); | |||
36437 | }; | |||
36438 | ||||
36439 | // Find the inputs that enter the chain. Note that multiple uses are OK | |||
36440 | // here, we're not going to remove the operands we find. | |||
36441 | bool UnaryShuffle = (Inputs.size() == 1); | |||
36442 | SDValue V1 = peekThroughBitcasts(Inputs[0]); | |||
36443 | SDValue V2 = (UnaryShuffle ? DAG.getUNDEF(V1.getValueType()) | |||
36444 | : peekThroughBitcasts(Inputs[1])); | |||
36445 | ||||
36446 | MVT VT1 = V1.getSimpleValueType(); | |||
36447 | MVT VT2 = V2.getSimpleValueType(); | |||
36448 | assert(VT1.getSizeInBits() == RootSizeInBits &&(static_cast <bool> (VT1.getSizeInBits() == RootSizeInBits && VT2.getSizeInBits() == RootSizeInBits && "Vector size mismatch" ) ? void (0) : __assert_fail ("VT1.getSizeInBits() == RootSizeInBits && VT2.getSizeInBits() == RootSizeInBits && \"Vector size mismatch\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 36449, __extension__ __PRETTY_FUNCTION__)) | |||
36449 | VT2.getSizeInBits() == RootSizeInBits && "Vector size mismatch")(static_cast <bool> (VT1.getSizeInBits() == RootSizeInBits && VT2.getSizeInBits() == RootSizeInBits && "Vector size mismatch" ) ? void (0) : __assert_fail ("VT1.getSizeInBits() == RootSizeInBits && VT2.getSizeInBits() == RootSizeInBits && \"Vector size mismatch\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 36449, __extension__ __PRETTY_FUNCTION__)); | |||
36450 | ||||
36451 | SDLoc DL(Root); | |||
36452 | SDValue Res; | |||
36453 | ||||
36454 | unsigned NumBaseMaskElts = BaseMask.size(); | |||
36455 | if (NumBaseMaskElts == 1) { | |||
36456 | assert(BaseMask[0] == 0 && "Invalid shuffle index found!")(static_cast <bool> (BaseMask[0] == 0 && "Invalid shuffle index found!" ) ? void (0) : __assert_fail ("BaseMask[0] == 0 && \"Invalid shuffle index found!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 36456, __extension__ __PRETTY_FUNCTION__)); | |||
36457 | return CanonicalizeShuffleInput(RootVT, V1); | |||
36458 | } | |||
36459 | ||||
36460 | bool OptForSize = DAG.shouldOptForSize(); | |||
36461 | unsigned BaseMaskEltSizeInBits = RootSizeInBits / NumBaseMaskElts; | |||
36462 | bool FloatDomain = VT1.isFloatingPoint() || VT2.isFloatingPoint() || | |||
36463 | (RootVT.isFloatingPoint() && Depth >= 1) || | |||
36464 | (RootVT.is256BitVector() && !Subtarget.hasAVX2()); | |||
36465 | ||||
36466 | // Don't combine if we are a AVX512/EVEX target and the mask element size | |||
36467 | // is different from the root element size - this would prevent writemasks | |||
36468 | // from being reused. | |||
36469 | bool IsMaskedShuffle = false; | |||
36470 | if (RootSizeInBits == 512 || (Subtarget.hasVLX() && RootSizeInBits >= 128)) { | |||
36471 | if (Root.hasOneUse() && Root->use_begin()->getOpcode() == ISD::VSELECT && | |||
36472 | Root->use_begin()->getOperand(0).getScalarValueSizeInBits() == 1) { | |||
36473 | IsMaskedShuffle = true; | |||
36474 | } | |||
36475 | } | |||
36476 | ||||
36477 | // If we are shuffling a broadcast (and not introducing zeros) then | |||
36478 | // we can just use the broadcast directly. This works for smaller broadcast | |||
36479 | // elements as well as they already repeat across each mask element | |||
36480 | if (UnaryShuffle && isTargetShuffleSplat(V1) && !isAnyZero(BaseMask) && | |||
36481 | (BaseMaskEltSizeInBits % V1.getScalarValueSizeInBits()) == 0 && | |||
36482 | V1.getValueSizeInBits() >= RootSizeInBits) { | |||
36483 | return CanonicalizeShuffleInput(RootVT, V1); | |||
36484 | } | |||
36485 | ||||
36486 | SmallVector<int, 64> Mask(BaseMask.begin(), BaseMask.end()); | |||
36487 | ||||
36488 | // See if the shuffle is a hidden identity shuffle - repeated args in HOPs | |||
36489 | // etc. can be simplified. | |||
36490 | if (VT1 == VT2 && VT1.getSizeInBits() == RootSizeInBits) { | |||
36491 | SmallVector<int> ScaledMask, IdentityMask; | |||
36492 | unsigned NumElts = VT1.getVectorNumElements(); | |||
36493 | if (Mask.size() <= NumElts && | |||
36494 | scaleShuffleElements(Mask, NumElts, ScaledMask)) { | |||
36495 | for (unsigned i = 0; i != NumElts; ++i) | |||
36496 | IdentityMask.push_back(i); | |||
36497 | if (isTargetShuffleEquivalent(RootVT, ScaledMask, IdentityMask, V1, V2)) | |||
36498 | return CanonicalizeShuffleInput(RootVT, V1); | |||
36499 | } | |||
36500 | } | |||
36501 | ||||
36502 | // Handle 128/256-bit lane shuffles of 512-bit vectors. | |||
36503 | if (RootVT.is512BitVector() && | |||
36504 | (NumBaseMaskElts == 2 || NumBaseMaskElts == 4)) { | |||
36505 | // If the upper subvectors are zeroable, then an extract+insert is more | |||
36506 | // optimal than using X86ISD::SHUF128. The insertion is free, even if it has | |||
36507 | // to zero the upper subvectors. | |||
36508 | if (isUndefOrZeroInRange(Mask, 1, NumBaseMaskElts - 1)) { | |||
36509 | if (Depth == 0 && Root.getOpcode() == ISD::INSERT_SUBVECTOR) | |||
36510 | return SDValue(); // Nothing to do! | |||
36511 | assert(isInRange(Mask[0], 0, NumBaseMaskElts) &&(static_cast <bool> (isInRange(Mask[0], 0, NumBaseMaskElts ) && "Unexpected lane shuffle") ? void (0) : __assert_fail ("isInRange(Mask[0], 0, NumBaseMaskElts) && \"Unexpected lane shuffle\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 36512, __extension__ __PRETTY_FUNCTION__)) | |||
36512 | "Unexpected lane shuffle")(static_cast <bool> (isInRange(Mask[0], 0, NumBaseMaskElts ) && "Unexpected lane shuffle") ? void (0) : __assert_fail ("isInRange(Mask[0], 0, NumBaseMaskElts) && \"Unexpected lane shuffle\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 36512, __extension__ __PRETTY_FUNCTION__)); | |||
36513 | Res = CanonicalizeShuffleInput(RootVT, V1); | |||
36514 | unsigned SubIdx = Mask[0] * (NumRootElts / NumBaseMaskElts); | |||
36515 | bool UseZero = isAnyZero(Mask); | |||
36516 | Res = extractSubVector(Res, SubIdx, DAG, DL, BaseMaskEltSizeInBits); | |||
36517 | return widenSubVector(Res, UseZero, Subtarget, DAG, DL, RootSizeInBits); | |||
36518 | } | |||
36519 | ||||
36520 | // Narrow shuffle mask to v4x128. | |||
36521 | SmallVector<int, 4> ScaledMask; | |||
36522 | assert((BaseMaskEltSizeInBits % 128) == 0 && "Illegal mask size")(static_cast <bool> ((BaseMaskEltSizeInBits % 128) == 0 && "Illegal mask size") ? void (0) : __assert_fail ( "(BaseMaskEltSizeInBits % 128) == 0 && \"Illegal mask size\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 36522, __extension__ __PRETTY_FUNCTION__)); | |||
36523 | narrowShuffleMaskElts(BaseMaskEltSizeInBits / 128, Mask, ScaledMask); | |||
36524 | ||||
36525 | // Try to lower to vshuf64x2/vshuf32x4. | |||
36526 | auto MatchSHUF128 = [&](MVT ShuffleVT, const SDLoc &DL, | |||
36527 | ArrayRef<int> ScaledMask, SDValue V1, SDValue V2, | |||
36528 | SelectionDAG &DAG) { | |||
36529 | unsigned PermMask = 0; | |||
36530 | // Insure elements came from the same Op. | |||
36531 | SDValue Ops[2] = {DAG.getUNDEF(ShuffleVT), DAG.getUNDEF(ShuffleVT)}; | |||
36532 | for (int i = 0; i < 4; ++i) { | |||
36533 | assert(ScaledMask[i] >= -1 && "Illegal shuffle sentinel value")(static_cast <bool> (ScaledMask[i] >= -1 && "Illegal shuffle sentinel value" ) ? void (0) : __assert_fail ("ScaledMask[i] >= -1 && \"Illegal shuffle sentinel value\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 36533, __extension__ __PRETTY_FUNCTION__)); | |||
36534 | if (ScaledMask[i] < 0) | |||
36535 | continue; | |||
36536 | ||||
36537 | SDValue Op = ScaledMask[i] >= 4 ? V2 : V1; | |||
36538 | unsigned OpIndex = i / 2; | |||
36539 | if (Ops[OpIndex].isUndef()) | |||
36540 | Ops[OpIndex] = Op; | |||
36541 | else if (Ops[OpIndex] != Op) | |||
36542 | return SDValue(); | |||
36543 | ||||
36544 | // Convert the 128-bit shuffle mask selection values into 128-bit | |||
36545 | // selection bits defined by a vshuf64x2 instruction's immediate control | |||
36546 | // byte. | |||
36547 | PermMask |= (ScaledMask[i] % 4) << (i * 2); | |||
36548 | } | |||
36549 | ||||
36550 | return DAG.getNode(X86ISD::SHUF128, DL, ShuffleVT, | |||
36551 | CanonicalizeShuffleInput(ShuffleVT, Ops[0]), | |||
36552 | CanonicalizeShuffleInput(ShuffleVT, Ops[1]), | |||
36553 | DAG.getTargetConstant(PermMask, DL, MVT::i8)); | |||
36554 | }; | |||
36555 | ||||
36556 | // FIXME: Is there a better way to do this? is256BitLaneRepeatedShuffleMask | |||
36557 | // doesn't work because our mask is for 128 bits and we don't have an MVT | |||
36558 | // to match that. | |||
36559 | bool PreferPERMQ = UnaryShuffle && isUndefOrInRange(ScaledMask[0], 0, 2) && | |||
36560 | isUndefOrInRange(ScaledMask[1], 0, 2) && | |||
36561 | isUndefOrInRange(ScaledMask[2], 2, 4) && | |||
36562 | isUndefOrInRange(ScaledMask[3], 2, 4) && | |||
36563 | (ScaledMask[0] < 0 || ScaledMask[2] < 0 || | |||
36564 | ScaledMask[0] == (ScaledMask[2] % 2)) && | |||
36565 | (ScaledMask[1] < 0 || ScaledMask[3] < 0 || | |||
36566 | ScaledMask[1] == (ScaledMask[3] % 2)); | |||
36567 | ||||
36568 | if (!isAnyZero(ScaledMask) && !PreferPERMQ) { | |||
36569 | if (Depth == 0 && Root.getOpcode() == X86ISD::SHUF128) | |||
36570 | return SDValue(); // Nothing to do! | |||
36571 | MVT ShuffleVT = (FloatDomain ? MVT::v8f64 : MVT::v8i64); | |||
36572 | if (SDValue V = MatchSHUF128(ShuffleVT, DL, ScaledMask, V1, V2, DAG)) | |||
36573 | return DAG.getBitcast(RootVT, V); | |||
36574 | } | |||
36575 | } | |||
36576 | ||||
36577 | // Handle 128-bit lane shuffles of 256-bit vectors. | |||
36578 | if (RootVT.is256BitVector() && NumBaseMaskElts == 2) { | |||
36579 | // If the upper half is zeroable, then an extract+insert is more optimal | |||
36580 | // than using X86ISD::VPERM2X128. The insertion is free, even if it has to | |||
36581 | // zero the upper half. | |||
36582 | if (isUndefOrZero(Mask[1])) { | |||
36583 | if (Depth == 0 && Root.getOpcode() == ISD::INSERT_SUBVECTOR) | |||
36584 | return SDValue(); // Nothing to do! | |||
36585 | assert(isInRange(Mask[0], 0, 2) && "Unexpected lane shuffle")(static_cast <bool> (isInRange(Mask[0], 0, 2) && "Unexpected lane shuffle") ? void (0) : __assert_fail ("isInRange(Mask[0], 0, 2) && \"Unexpected lane shuffle\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 36585, __extension__ __PRETTY_FUNCTION__)); | |||
36586 | Res = CanonicalizeShuffleInput(RootVT, V1); | |||
36587 | Res = extract128BitVector(Res, Mask[0] * (NumRootElts / 2), DAG, DL); | |||
36588 | return widenSubVector(Res, Mask[1] == SM_SentinelZero, Subtarget, DAG, DL, | |||
36589 | 256); | |||
36590 | } | |||
36591 | ||||
36592 | // If we're splatting the low subvector, an insert-subvector 'concat' | |||
36593 | // pattern is quicker than VPERM2X128. | |||
36594 | // TODO: Add AVX2 support instead of VPERMQ/VPERMPD. | |||
36595 | if (Mask[0] == 0 && Mask[1] == 0 && !Subtarget.hasAVX2()) { | |||
36596 | if (Depth == 0 && Root.getOpcode() == ISD::INSERT_SUBVECTOR) | |||
36597 | return SDValue(); // Nothing to do! | |||
36598 | Res = CanonicalizeShuffleInput(RootVT, V1); | |||
36599 | Res = extractSubVector(Res, 0, DAG, DL, 128); | |||
36600 | return concatSubVectors(Res, Res, DAG, DL); | |||
36601 | } | |||
36602 | ||||
36603 | if (Depth == 0 && Root.getOpcode() == X86ISD::VPERM2X128) | |||
36604 | return SDValue(); // Nothing to do! | |||
36605 | ||||
36606 | // If we have AVX2, prefer to use VPERMQ/VPERMPD for unary shuffles unless | |||
36607 | // we need to use the zeroing feature. | |||
36608 | // Prefer blends for sequential shuffles unless we are optimizing for size. | |||
36609 | if (UnaryShuffle && | |||
36610 | !(Subtarget.hasAVX2() && isUndefOrInRange(Mask, 0, 2)) && | |||
36611 | (OptForSize || !isSequentialOrUndefOrZeroInRange(Mask, 0, 2, 0))) { | |||
36612 | unsigned PermMask = 0; | |||
36613 | PermMask |= ((Mask[0] < 0 ? 0x8 : (Mask[0] & 1)) << 0); | |||
36614 | PermMask |= ((Mask[1] < 0 ? 0x8 : (Mask[1] & 1)) << 4); | |||
36615 | return DAG.getNode( | |||
36616 | X86ISD::VPERM2X128, DL, RootVT, CanonicalizeShuffleInput(RootVT, V1), | |||
36617 | DAG.getUNDEF(RootVT), DAG.getTargetConstant(PermMask, DL, MVT::i8)); | |||
36618 | } | |||
36619 | ||||
36620 | if (Depth == 0 && Root.getOpcode() == X86ISD::SHUF128) | |||
36621 | return SDValue(); // Nothing to do! | |||
36622 | ||||
36623 | // TODO - handle AVX512VL cases with X86ISD::SHUF128. | |||
36624 | if (!UnaryShuffle && !IsMaskedShuffle) { | |||
36625 | assert(llvm::all_of(Mask, [](int M) { return 0 <= M && M < 4; }) &&(static_cast <bool> (llvm::all_of(Mask, [](int M) { return 0 <= M && M < 4; }) && "Unexpected shuffle sentinel value" ) ? void (0) : __assert_fail ("llvm::all_of(Mask, [](int M) { return 0 <= M && M < 4; }) && \"Unexpected shuffle sentinel value\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 36626, __extension__ __PRETTY_FUNCTION__)) | |||
36626 | "Unexpected shuffle sentinel value")(static_cast <bool> (llvm::all_of(Mask, [](int M) { return 0 <= M && M < 4; }) && "Unexpected shuffle sentinel value" ) ? void (0) : __assert_fail ("llvm::all_of(Mask, [](int M) { return 0 <= M && M < 4; }) && \"Unexpected shuffle sentinel value\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 36626, __extension__ __PRETTY_FUNCTION__)); | |||
36627 | // Prefer blends to X86ISD::VPERM2X128. | |||
36628 | if (!((Mask[0] == 0 && Mask[1] == 3) || (Mask[0] == 2 && Mask[1] == 1))) { | |||
36629 | unsigned PermMask = 0; | |||
36630 | PermMask |= ((Mask[0] & 3) << 0); | |||
36631 | PermMask |= ((Mask[1] & 3) << 4); | |||
36632 | SDValue LHS = isInRange(Mask[0], 0, 2) ? V1 : V2; | |||
36633 | SDValue RHS = isInRange(Mask[1], 0, 2) ? V1 : V2; | |||
36634 | return DAG.getNode(X86ISD::VPERM2X128, DL, RootVT, | |||
36635 | CanonicalizeShuffleInput(RootVT, LHS), | |||
36636 | CanonicalizeShuffleInput(RootVT, RHS), | |||
36637 | DAG.getTargetConstant(PermMask, DL, MVT::i8)); | |||
36638 | } | |||
36639 | } | |||
36640 | } | |||
36641 | ||||
36642 | // For masks that have been widened to 128-bit elements or more, | |||
36643 | // narrow back down to 64-bit elements. | |||
36644 | if (BaseMaskEltSizeInBits > 64) { | |||
36645 | assert((BaseMaskEltSizeInBits % 64) == 0 && "Illegal mask size")(static_cast <bool> ((BaseMaskEltSizeInBits % 64) == 0 && "Illegal mask size") ? void (0) : __assert_fail ("(BaseMaskEltSizeInBits % 64) == 0 && \"Illegal mask size\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 36645, __extension__ __PRETTY_FUNCTION__)); | |||
36646 | int MaskScale = BaseMaskEltSizeInBits / 64; | |||
36647 | SmallVector<int, 64> ScaledMask; | |||
36648 | narrowShuffleMaskElts(MaskScale, Mask, ScaledMask); | |||
36649 | Mask = std::move(ScaledMask); | |||
36650 | } | |||
36651 | ||||
36652 | // For masked shuffles, we're trying to match the root width for better | |||
36653 | // writemask folding, attempt to scale the mask. | |||
36654 | // TODO - variable shuffles might need this to be widened again. | |||
36655 | if (IsMaskedShuffle && NumRootElts > Mask.size()) { | |||
36656 | assert((NumRootElts % Mask.size()) == 0 && "Illegal mask size")(static_cast <bool> ((NumRootElts % Mask.size()) == 0 && "Illegal mask size") ? void (0) : __assert_fail ("(NumRootElts % Mask.size()) == 0 && \"Illegal mask size\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 36656, __extension__ __PRETTY_FUNCTION__)); | |||
36657 | int MaskScale = NumRootElts / Mask.size(); | |||
36658 | SmallVector<int, 64> ScaledMask; | |||
36659 | narrowShuffleMaskElts(MaskScale, Mask, ScaledMask); | |||
36660 | Mask = std::move(ScaledMask); | |||
36661 | } | |||
36662 | ||||
36663 | unsigned NumMaskElts = Mask.size(); | |||
36664 | unsigned MaskEltSizeInBits = RootSizeInBits / NumMaskElts; | |||
36665 | ||||
36666 | // Determine the effective mask value type. | |||
36667 | FloatDomain &= (32 <= MaskEltSizeInBits); | |||
36668 | MVT MaskVT = FloatDomain ? MVT::getFloatingPointVT(MaskEltSizeInBits) | |||
36669 | : MVT::getIntegerVT(MaskEltSizeInBits); | |||
36670 | MaskVT = MVT::getVectorVT(MaskVT, NumMaskElts); | |||
36671 | ||||
36672 | // Only allow legal mask types. | |||
36673 | if (!DAG.getTargetLoweringInfo().isTypeLegal(MaskVT)) | |||
36674 | return SDValue(); | |||
36675 | ||||
36676 | // Attempt to match the mask against known shuffle patterns. | |||
36677 | MVT ShuffleSrcVT, ShuffleVT; | |||
36678 | unsigned Shuffle, PermuteImm; | |||
36679 | ||||
36680 | // Which shuffle domains are permitted? | |||
36681 | // Permit domain crossing at higher combine depths. | |||
36682 | // TODO: Should we indicate which domain is preferred if both are allowed? | |||
36683 | bool AllowFloatDomain = FloatDomain || (Depth >= 3); | |||
36684 | bool AllowIntDomain = (!FloatDomain || (Depth >= 3)) && Subtarget.hasSSE2() && | |||
36685 | (!MaskVT.is256BitVector() || Subtarget.hasAVX2()); | |||
36686 | ||||
36687 | // Determine zeroable mask elements. | |||
36688 | APInt KnownUndef, KnownZero; | |||
36689 | resolveZeroablesFromTargetShuffle(Mask, KnownUndef, KnownZero); | |||
36690 | APInt Zeroable = KnownUndef | KnownZero; | |||
36691 | ||||
36692 | if (UnaryShuffle) { | |||
36693 | // Attempt to match against broadcast-from-vector. | |||
36694 | // Limit AVX1 to cases where we're loading+broadcasting a scalar element. | |||
36695 | if ((Subtarget.hasAVX2() || | |||
36696 | (Subtarget.hasAVX() && 32 <= MaskEltSizeInBits)) && | |||
36697 | (!IsMaskedShuffle || NumRootElts == NumMaskElts)) { | |||
36698 | if (isUndefOrEqual(Mask, 0)) { | |||
36699 | if (V1.getValueType() == MaskVT && | |||
36700 | V1.getOpcode() == ISD::SCALAR_TO_VECTOR && | |||
36701 | MayFoldLoad(V1.getOperand(0))) { | |||
36702 | if (Depth == 0 && Root.getOpcode() == X86ISD::VBROADCAST) | |||
36703 | return SDValue(); // Nothing to do! | |||
36704 | Res = V1.getOperand(0); | |||
36705 | Res = DAG.getNode(X86ISD::VBROADCAST, DL, MaskVT, Res); | |||
36706 | return DAG.getBitcast(RootVT, Res); | |||
36707 | } | |||
36708 | if (Subtarget.hasAVX2()) { | |||
36709 | if (Depth == 0 && Root.getOpcode() == X86ISD::VBROADCAST) | |||
36710 | return SDValue(); // Nothing to do! | |||
36711 | Res = CanonicalizeShuffleInput(MaskVT, V1); | |||
36712 | Res = DAG.getNode(X86ISD::VBROADCAST, DL, MaskVT, Res); | |||
36713 | return DAG.getBitcast(RootVT, Res); | |||
36714 | } | |||
36715 | } | |||
36716 | } | |||
36717 | ||||
36718 | SDValue NewV1 = V1; // Save operand in case early exit happens. | |||
36719 | if (matchUnaryShuffle(MaskVT, Mask, AllowFloatDomain, AllowIntDomain, NewV1, | |||
36720 | DL, DAG, Subtarget, Shuffle, ShuffleSrcVT, | |||
36721 | ShuffleVT) && | |||
36722 | (!IsMaskedShuffle || | |||
36723 | (NumRootElts == ShuffleVT.getVectorNumElements()))) { | |||
36724 | if (Depth == 0 && Root.getOpcode() == Shuffle) | |||
36725 | return SDValue(); // Nothing to do! | |||
36726 | Res = CanonicalizeShuffleInput(ShuffleSrcVT, NewV1); | |||
36727 | Res = DAG.getNode(Shuffle, DL, ShuffleVT, Res); | |||
36728 | return DAG.getBitcast(RootVT, Res); | |||
36729 | } | |||
36730 | ||||
36731 | if (matchUnaryPermuteShuffle(MaskVT, Mask, Zeroable, AllowFloatDomain, | |||
36732 | AllowIntDomain, Subtarget, Shuffle, ShuffleVT, | |||
36733 | PermuteImm) && | |||
36734 | (!IsMaskedShuffle || | |||
36735 | (NumRootElts == ShuffleVT.getVectorNumElements()))) { | |||
36736 | if (Depth == 0 && Root.getOpcode() == Shuffle) | |||
36737 | return SDValue(); // Nothing to do! | |||
36738 | Res = CanonicalizeShuffleInput(ShuffleVT, V1); | |||
36739 | Res = DAG.getNode(Shuffle, DL, ShuffleVT, Res, | |||
36740 | DAG.getTargetConstant(PermuteImm, DL, MVT::i8)); | |||
36741 | return DAG.getBitcast(RootVT, Res); | |||
36742 | } | |||
36743 | } | |||
36744 | ||||
36745 | // Attempt to combine to INSERTPS, but only if the inserted element has come | |||
36746 | // from a scalar. | |||
36747 | // TODO: Handle other insertions here as well? | |||
36748 | if (!UnaryShuffle && AllowFloatDomain && RootSizeInBits == 128 && | |||
36749 | Subtarget.hasSSE41() && | |||
36750 | !isTargetShuffleEquivalent(MaskVT, Mask, {4, 1, 2, 3})) { | |||
36751 | if (MaskEltSizeInBits == 32) { | |||
36752 | SDValue SrcV1 = V1, SrcV2 = V2; | |||
36753 | if (matchShuffleAsInsertPS(SrcV1, SrcV2, PermuteImm, Zeroable, Mask, | |||
36754 | DAG) && | |||
36755 | SrcV2.getOpcode() == ISD::SCALAR_TO_VECTOR) { | |||
36756 | if (Depth == 0 && Root.getOpcode() == X86ISD::INSERTPS) | |||
36757 | return SDValue(); // Nothing to do! | |||
36758 | Res = DAG.getNode(X86ISD::INSERTPS, DL, MVT::v4f32, | |||
36759 | CanonicalizeShuffleInput(MVT::v4f32, SrcV1), | |||
36760 | CanonicalizeShuffleInput(MVT::v4f32, SrcV2), | |||
36761 | DAG.getTargetConstant(PermuteImm, DL, MVT::i8)); | |||
36762 | return DAG.getBitcast(RootVT, Res); | |||
36763 | } | |||
36764 | } | |||
36765 | if (MaskEltSizeInBits == 64 && | |||
36766 | isTargetShuffleEquivalent(MaskVT, Mask, {0, 2}) && | |||
36767 | V2.getOpcode() == ISD::SCALAR_TO_VECTOR && | |||
36768 | V2.getScalarValueSizeInBits() <= 32) { | |||
36769 | if (Depth == 0 && Root.getOpcode() == X86ISD::INSERTPS) | |||
36770 | return SDValue(); // Nothing to do! | |||
36771 | PermuteImm = (/*DstIdx*/2 << 4) | (/*SrcIdx*/0 << 0); | |||
36772 | Res = DAG.getNode(X86ISD::INSERTPS, DL, MVT::v4f32, | |||
36773 | CanonicalizeShuffleInput(MVT::v4f32, V1), | |||
36774 | CanonicalizeShuffleInput(MVT::v4f32, V2), | |||
36775 | DAG.getTargetConstant(PermuteImm, DL, MVT::i8)); | |||
36776 | return DAG.getBitcast(RootVT, Res); | |||
36777 | } | |||
36778 | } | |||
36779 | ||||
36780 | SDValue NewV1 = V1; // Save operands in case early exit happens. | |||
36781 | SDValue NewV2 = V2; | |||
36782 | if (matchBinaryShuffle(MaskVT, Mask, AllowFloatDomain, AllowIntDomain, NewV1, | |||
36783 | NewV2, DL, DAG, Subtarget, Shuffle, ShuffleSrcVT, | |||
36784 | ShuffleVT, UnaryShuffle) && | |||
36785 | (!IsMaskedShuffle || (NumRootElts == ShuffleVT.getVectorNumElements()))) { | |||
36786 | if (Depth == 0 && Root.getOpcode() == Shuffle) | |||
36787 | return SDValue(); // Nothing to do! | |||
36788 | NewV1 = CanonicalizeShuffleInput(ShuffleSrcVT, NewV1); | |||
36789 | NewV2 = CanonicalizeShuffleInput(ShuffleSrcVT, NewV2); | |||
36790 | Res = DAG.getNode(Shuffle, DL, ShuffleVT, NewV1, NewV2); | |||
36791 | return DAG.getBitcast(RootVT, Res); | |||
36792 | } | |||
36793 | ||||
36794 | NewV1 = V1; // Save operands in case early exit happens. | |||
36795 | NewV2 = V2; | |||
36796 | if (matchBinaryPermuteShuffle(MaskVT, Mask, Zeroable, AllowFloatDomain, | |||
36797 | AllowIntDomain, NewV1, NewV2, DL, DAG, | |||
36798 | Subtarget, Shuffle, ShuffleVT, PermuteImm) && | |||
36799 | (!IsMaskedShuffle || (NumRootElts == ShuffleVT.getVectorNumElements()))) { | |||
36800 | if (Depth == 0 && Root.getOpcode() == Shuffle) | |||
36801 | return SDValue(); // Nothing to do! | |||
36802 | NewV1 = CanonicalizeShuffleInput(ShuffleVT, NewV1); | |||
36803 | NewV2 = CanonicalizeShuffleInput(ShuffleVT, NewV2); | |||
36804 | Res = DAG.getNode(Shuffle, DL, ShuffleVT, NewV1, NewV2, | |||
36805 | DAG.getTargetConstant(PermuteImm, DL, MVT::i8)); | |||
36806 | return DAG.getBitcast(RootVT, Res); | |||
36807 | } | |||
36808 | ||||
36809 | // Typically from here on, we need an integer version of MaskVT. | |||
36810 | MVT IntMaskVT = MVT::getIntegerVT(MaskEltSizeInBits); | |||
36811 | IntMaskVT = MVT::getVectorVT(IntMaskVT, NumMaskElts); | |||
36812 | ||||
36813 | // Annoyingly, SSE4A instructions don't map into the above match helpers. | |||
36814 | if (Subtarget.hasSSE4A() && AllowIntDomain && RootSizeInBits == 128) { | |||
36815 | uint64_t BitLen, BitIdx; | |||
36816 | if (matchShuffleAsEXTRQ(IntMaskVT, V1, V2, Mask, BitLen, BitIdx, | |||
36817 | Zeroable)) { | |||
36818 | if (Depth == 0 && Root.getOpcode() == X86ISD::EXTRQI) | |||
36819 | return SDValue(); // Nothing to do! | |||
36820 | V1 = CanonicalizeShuffleInput(IntMaskVT, V1); | |||
36821 | Res = DAG.getNode(X86ISD::EXTRQI, DL, IntMaskVT, V1, | |||
36822 | DAG.getTargetConstant(BitLen, DL, MVT::i8), | |||
36823 | DAG.getTargetConstant(BitIdx, DL, MVT::i8)); | |||
36824 | return DAG.getBitcast(RootVT, Res); | |||
36825 | } | |||
36826 | ||||
36827 | if (matchShuffleAsINSERTQ(IntMaskVT, V1, V2, Mask, BitLen, BitIdx)) { | |||
36828 | if (Depth == 0 && Root.getOpcode() == X86ISD::INSERTQI) | |||
36829 | return SDValue(); // Nothing to do! | |||
36830 | V1 = CanonicalizeShuffleInput(IntMaskVT, V1); | |||
36831 | V2 = CanonicalizeShuffleInput(IntMaskVT, V2); | |||
36832 | Res = DAG.getNode(X86ISD::INSERTQI, DL, IntMaskVT, V1, V2, | |||
36833 | DAG.getTargetConstant(BitLen, DL, MVT::i8), | |||
36834 | DAG.getTargetConstant(BitIdx, DL, MVT::i8)); | |||
36835 | return DAG.getBitcast(RootVT, Res); | |||
36836 | } | |||
36837 | } | |||
36838 | ||||
36839 | // Match shuffle against TRUNCATE patterns. | |||
36840 | if (AllowIntDomain && MaskEltSizeInBits < 64 && Subtarget.hasAVX512()) { | |||
36841 | // Match against a VTRUNC instruction, accounting for src/dst sizes. | |||
36842 | if (matchShuffleAsVTRUNC(ShuffleSrcVT, ShuffleVT, IntMaskVT, Mask, Zeroable, | |||
36843 | Subtarget)) { | |||
36844 | bool IsTRUNCATE = ShuffleVT.getVectorNumElements() == | |||
36845 | ShuffleSrcVT.getVectorNumElements(); | |||
36846 | unsigned Opc = | |||
36847 | IsTRUNCATE ? (unsigned)ISD::TRUNCATE : (unsigned)X86ISD::VTRUNC; | |||
36848 | if (Depth == 0 && Root.getOpcode() == Opc) | |||
36849 | return SDValue(); // Nothing to do! | |||
36850 | V1 = CanonicalizeShuffleInput(ShuffleSrcVT, V1); | |||
36851 | Res = DAG.getNode(Opc, DL, ShuffleVT, V1); | |||
36852 | if (ShuffleVT.getSizeInBits() < RootSizeInBits) | |||
36853 | Res = widenSubVector(Res, true, Subtarget, DAG, DL, RootSizeInBits); | |||
36854 | return DAG.getBitcast(RootVT, Res); | |||
36855 | } | |||
36856 | ||||
36857 | // Do we need a more general binary truncation pattern? | |||
36858 | if (RootSizeInBits < 512 && | |||
36859 | ((RootVT.is256BitVector() && Subtarget.useAVX512Regs()) || | |||
36860 | (RootVT.is128BitVector() && Subtarget.hasVLX())) && | |||
36861 | (MaskEltSizeInBits > 8 || Subtarget.hasBWI()) && | |||
36862 | isSequentialOrUndefInRange(Mask, 0, NumMaskElts, 0, 2)) { | |||
36863 | if (Depth == 0 && Root.getOpcode() == ISD::TRUNCATE) | |||
36864 | return SDValue(); // Nothing to do! | |||
36865 | ShuffleSrcVT = MVT::getIntegerVT(MaskEltSizeInBits * 2); | |||
36866 | ShuffleSrcVT = MVT::getVectorVT(ShuffleSrcVT, NumMaskElts / 2); | |||
36867 | V1 = CanonicalizeShuffleInput(ShuffleSrcVT, V1); | |||
36868 | V2 = CanonicalizeShuffleInput(ShuffleSrcVT, V2); | |||
36869 | ShuffleSrcVT = MVT::getIntegerVT(MaskEltSizeInBits * 2); | |||
36870 | ShuffleSrcVT = MVT::getVectorVT(ShuffleSrcVT, NumMaskElts); | |||
36871 | Res = DAG.getNode(ISD::CONCAT_VECTORS, DL, ShuffleSrcVT, V1, V2); | |||
36872 | Res = DAG.getNode(ISD::TRUNCATE, DL, IntMaskVT, Res); | |||
36873 | return DAG.getBitcast(RootVT, Res); | |||
36874 | } | |||
36875 | } | |||
36876 | ||||
36877 | // Don't try to re-form single instruction chains under any circumstances now | |||
36878 | // that we've done encoding canonicalization for them. | |||
36879 | if (Depth < 1) | |||
36880 | return SDValue(); | |||
36881 | ||||
36882 | // Depth threshold above which we can efficiently use variable mask shuffles. | |||
36883 | int VariableCrossLaneShuffleDepth = | |||
36884 | Subtarget.hasFastVariableCrossLaneShuffle() ? 1 : 2; | |||
36885 | int VariablePerLaneShuffleDepth = | |||
36886 | Subtarget.hasFastVariablePerLaneShuffle() ? 1 : 2; | |||
36887 | AllowVariableCrossLaneMask &= | |||
36888 | (Depth >= VariableCrossLaneShuffleDepth) || HasVariableMask; | |||
36889 | AllowVariablePerLaneMask &= | |||
36890 | (Depth >= VariablePerLaneShuffleDepth) || HasVariableMask; | |||
36891 | // VPERMI2W/VPERMI2B are 3 uops on Skylake and Icelake so we require a | |||
36892 | // higher depth before combining them. | |||
36893 | bool AllowBWIVPERMV3 = | |||
36894 | (Depth >= (VariableCrossLaneShuffleDepth + 2) || HasVariableMask); | |||
36895 | ||||
36896 | bool MaskContainsZeros = isAnyZero(Mask); | |||
36897 | ||||
36898 | if (is128BitLaneCrossingShuffleMask(MaskVT, Mask)) { | |||
36899 | // If we have a single input lane-crossing shuffle then lower to VPERMV. | |||
36900 | if (UnaryShuffle && AllowVariableCrossLaneMask && !MaskContainsZeros) { | |||
36901 | if (Subtarget.hasAVX2() && | |||
36902 | (MaskVT == MVT::v8f32 || MaskVT == MVT::v8i32)) { | |||
36903 | SDValue VPermMask = getConstVector(Mask, IntMaskVT, DAG, DL, true); | |||
36904 | Res = CanonicalizeShuffleInput(MaskVT, V1); | |||
36905 | Res = DAG.getNode(X86ISD::VPERMV, DL, MaskVT, VPermMask, Res); | |||
36906 | return DAG.getBitcast(RootVT, Res); | |||
36907 | } | |||
36908 | // AVX512 variants (non-VLX will pad to 512-bit shuffles). | |||
36909 | if ((Subtarget.hasAVX512() && | |||
36910 | (MaskVT == MVT::v8f64 || MaskVT == MVT::v8i64 || | |||
36911 | MaskVT == MVT::v16f32 || MaskVT == MVT::v16i32)) || | |||
36912 | (Subtarget.hasBWI() && | |||
36913 | (MaskVT == MVT::v16i16 || MaskVT == MVT::v32i16)) || | |||
36914 | (Subtarget.hasVBMI() && | |||
36915 | (MaskVT == MVT::v32i8 || MaskVT == MVT::v64i8))) { | |||
36916 | V1 = CanonicalizeShuffleInput(MaskVT, V1); | |||
36917 | V2 = DAG.getUNDEF(MaskVT); | |||
36918 | Res = lowerShuffleWithPERMV(DL, MaskVT, Mask, V1, V2, Subtarget, DAG); | |||
36919 | return DAG.getBitcast(RootVT, Res); | |||
36920 | } | |||
36921 | } | |||
36922 | ||||
36923 | // Lower a unary+zero lane-crossing shuffle as VPERMV3 with a zero | |||
36924 | // vector as the second source (non-VLX will pad to 512-bit shuffles). | |||
36925 | if (UnaryShuffle && AllowVariableCrossLaneMask && | |||
36926 | ((Subtarget.hasAVX512() && | |||
36927 | (MaskVT == MVT::v8f64 || MaskVT == MVT::v8i64 || | |||
36928 | MaskVT == MVT::v4f64 || MaskVT == MVT::v4i64 || | |||
36929 | MaskVT == MVT::v8f32 || MaskVT == MVT::v8i32 || | |||
36930 | MaskVT == MVT::v16f32 || MaskVT == MVT::v16i32)) || | |||
36931 | (Subtarget.hasBWI() && AllowBWIVPERMV3 && | |||
36932 | (MaskVT == MVT::v16i16 || MaskVT == MVT::v32i16)) || | |||
36933 | (Subtarget.hasVBMI() && AllowBWIVPERMV3 && | |||
36934 | (MaskVT == MVT::v32i8 || MaskVT == MVT::v64i8)))) { | |||
36935 | // Adjust shuffle mask - replace SM_SentinelZero with second source index. | |||
36936 | for (unsigned i = 0; i != NumMaskElts; ++i) | |||
36937 | if (Mask[i] == SM_SentinelZero) | |||
36938 | Mask[i] = NumMaskElts + i; | |||
36939 | V1 = CanonicalizeShuffleInput(MaskVT, V1); | |||
36940 | V2 = getZeroVector(MaskVT, Subtarget, DAG, DL); | |||
36941 | Res = lowerShuffleWithPERMV(DL, MaskVT, Mask, V1, V2, Subtarget, DAG); | |||
36942 | return DAG.getBitcast(RootVT, Res); | |||
36943 | } | |||
36944 | ||||
36945 | // If that failed and either input is extracted then try to combine as a | |||
36946 | // shuffle with the larger type. | |||
36947 | if (SDValue WideShuffle = combineX86ShuffleChainWithExtract( | |||
36948 | Inputs, Root, BaseMask, Depth, HasVariableMask, | |||
36949 | AllowVariableCrossLaneMask, AllowVariablePerLaneMask, DAG, | |||
36950 | Subtarget)) | |||
36951 | return WideShuffle; | |||
36952 | ||||
36953 | // If we have a dual input lane-crossing shuffle then lower to VPERMV3, | |||
36954 | // (non-VLX will pad to 512-bit shuffles). | |||
36955 | if (AllowVariableCrossLaneMask && !MaskContainsZeros && | |||
36956 | ((Subtarget.hasAVX512() && | |||
36957 | (MaskVT == MVT::v8f64 || MaskVT == MVT::v8i64 || | |||
36958 | MaskVT == MVT::v4f64 || MaskVT == MVT::v4i64 || | |||
36959 | MaskVT == MVT::v16f32 || MaskVT == MVT::v16i32 || | |||
36960 | MaskVT == MVT::v8f32 || MaskVT == MVT::v8i32)) || | |||
36961 | (Subtarget.hasBWI() && AllowBWIVPERMV3 && | |||
36962 | (MaskVT == MVT::v16i16 || MaskVT == MVT::v32i16)) || | |||
36963 | (Subtarget.hasVBMI() && AllowBWIVPERMV3 && | |||
36964 | (MaskVT == MVT::v32i8 || MaskVT == MVT::v64i8)))) { | |||
36965 | V1 = CanonicalizeShuffleInput(MaskVT, V1); | |||
36966 | V2 = CanonicalizeShuffleInput(MaskVT, V2); | |||
36967 | Res = lowerShuffleWithPERMV(DL, MaskVT, Mask, V1, V2, Subtarget, DAG); | |||
36968 | return DAG.getBitcast(RootVT, Res); | |||
36969 | } | |||
36970 | return SDValue(); | |||
36971 | } | |||
36972 | ||||
36973 | // See if we can combine a single input shuffle with zeros to a bit-mask, | |||
36974 | // which is much simpler than any shuffle. | |||
36975 | if (UnaryShuffle && MaskContainsZeros && AllowVariablePerLaneMask && | |||
36976 | isSequentialOrUndefOrZeroInRange(Mask, 0, NumMaskElts, 0) && | |||
36977 | DAG.getTargetLoweringInfo().isTypeLegal(MaskVT)) { | |||
36978 | APInt Zero = APInt::getNullValue(MaskEltSizeInBits); | |||
36979 | APInt AllOnes = APInt::getAllOnesValue(MaskEltSizeInBits); | |||
36980 | APInt UndefElts(NumMaskElts, 0); | |||
36981 | SmallVector<APInt, 64> EltBits(NumMaskElts, Zero); | |||
36982 | for (unsigned i = 0; i != NumMaskElts; ++i) { | |||
36983 | int M = Mask[i]; | |||
36984 | if (M == SM_SentinelUndef) { | |||
36985 | UndefElts.setBit(i); | |||
36986 | continue; | |||
36987 | } | |||
36988 | if (M == SM_SentinelZero) | |||
36989 | continue; | |||
36990 | EltBits[i] = AllOnes; | |||
36991 | } | |||
36992 | SDValue BitMask = getConstVector(EltBits, UndefElts, MaskVT, DAG, DL); | |||
36993 | Res = CanonicalizeShuffleInput(MaskVT, V1); | |||
36994 | unsigned AndOpcode = | |||
36995 | MaskVT.isFloatingPoint() ? unsigned(X86ISD::FAND) : unsigned(ISD::AND); | |||
36996 | Res = DAG.getNode(AndOpcode, DL, MaskVT, Res, BitMask); | |||
36997 | return DAG.getBitcast(RootVT, Res); | |||
36998 | } | |||
36999 | ||||
37000 | // If we have a single input shuffle with different shuffle patterns in the | |||
37001 | // the 128-bit lanes use the variable mask to VPERMILPS. | |||
37002 | // TODO Combine other mask types at higher depths. | |||
37003 | if (UnaryShuffle && AllowVariablePerLaneMask && !MaskContainsZeros && | |||
37004 | ((MaskVT == MVT::v8f32 && Subtarget.hasAVX()) || | |||
37005 | (MaskVT == MVT::v16f32 && Subtarget.hasAVX512()))) { | |||
37006 | SmallVector<SDValue, 16> VPermIdx; | |||
37007 | for (int M : Mask) { | |||
37008 | SDValue Idx = | |||
37009 | M < 0 ? DAG.getUNDEF(MVT::i32) : DAG.getConstant(M % 4, DL, MVT::i32); | |||
37010 | VPermIdx.push_back(Idx); | |||
37011 | } | |||
37012 | SDValue VPermMask = DAG.getBuildVector(IntMaskVT, DL, VPermIdx); | |||
37013 | Res = CanonicalizeShuffleInput(MaskVT, V1); | |||
37014 | Res = DAG.getNode(X86ISD::VPERMILPV, DL, MaskVT, Res, VPermMask); | |||
37015 | return DAG.getBitcast(RootVT, Res); | |||
37016 | } | |||
37017 | ||||
37018 | // With XOP, binary shuffles of 128/256-bit floating point vectors can combine | |||
37019 | // to VPERMIL2PD/VPERMIL2PS. | |||
37020 | if (AllowVariablePerLaneMask && Subtarget.hasXOP() && | |||
37021 | (MaskVT == MVT::v2f64 || MaskVT == MVT::v4f64 || MaskVT == MVT::v4f32 || | |||
37022 | MaskVT == MVT::v8f32)) { | |||
37023 | // VPERMIL2 Operation. | |||
37024 | // Bits[3] - Match Bit. | |||
37025 | // Bits[2:1] - (Per Lane) PD Shuffle Mask. | |||
37026 | // Bits[2:0] - (Per Lane) PS Shuffle Mask. | |||
37027 | unsigned NumLanes = MaskVT.getSizeInBits() / 128; | |||
37028 | unsigned NumEltsPerLane = NumMaskElts / NumLanes; | |||
37029 | SmallVector<int, 8> VPerm2Idx; | |||
37030 | unsigned M2ZImm = 0; | |||
37031 | for (int M : Mask) { | |||
37032 | if (M == SM_SentinelUndef) { | |||
37033 | VPerm2Idx.push_back(-1); | |||
37034 | continue; | |||
37035 | } | |||
37036 | if (M == SM_SentinelZero) { | |||
37037 | M2ZImm = 2; | |||
37038 | VPerm2Idx.push_back(8); | |||
37039 | continue; | |||
37040 | } | |||
37041 | int Index = (M % NumEltsPerLane) + ((M / NumMaskElts) * NumEltsPerLane); | |||
37042 | Index = (MaskVT.getScalarSizeInBits() == 64 ? Index << 1 : Index); | |||
37043 | VPerm2Idx.push_back(Index); | |||
37044 | } | |||
37045 | V1 = CanonicalizeShuffleInput(MaskVT, V1); | |||
37046 | V2 = CanonicalizeShuffleInput(MaskVT, V2); | |||
37047 | SDValue VPerm2MaskOp = getConstVector(VPerm2Idx, IntMaskVT, DAG, DL, true); | |||
37048 | Res = DAG.getNode(X86ISD::VPERMIL2, DL, MaskVT, V1, V2, VPerm2MaskOp, | |||
37049 | DAG.getTargetConstant(M2ZImm, DL, MVT::i8)); | |||
37050 | return DAG.getBitcast(RootVT, Res); | |||
37051 | } | |||
37052 | ||||
37053 | // If we have 3 or more shuffle instructions or a chain involving a variable | |||
37054 | // mask, we can replace them with a single PSHUFB instruction profitably. | |||
37055 | // Intel's manuals suggest only using PSHUFB if doing so replacing 5 | |||
37056 | // instructions, but in practice PSHUFB tends to be *very* fast so we're | |||
37057 | // more aggressive. | |||
37058 | if (UnaryShuffle && AllowVariablePerLaneMask && | |||
37059 | ((RootVT.is128BitVector() && Subtarget.hasSSSE3()) || | |||
37060 | (RootVT.is256BitVector() && Subtarget.hasAVX2()) || | |||
37061 | (RootVT.is512BitVector() && Subtarget.hasBWI()))) { | |||
37062 | SmallVector<SDValue, 16> PSHUFBMask; | |||
37063 | int NumBytes = RootVT.getSizeInBits() / 8; | |||
37064 | int Ratio = NumBytes / NumMaskElts; | |||
37065 | for (int i = 0; i < NumBytes; ++i) { | |||
37066 | int M = Mask[i / Ratio]; | |||
37067 | if (M == SM_SentinelUndef) { | |||
37068 | PSHUFBMask.push_back(DAG.getUNDEF(MVT::i8)); | |||
37069 | continue; | |||
37070 | } | |||
37071 | if (M == SM_SentinelZero) { | |||
37072 | PSHUFBMask.push_back(DAG.getConstant(0x80, DL, MVT::i8)); | |||
37073 | continue; | |||
37074 | } | |||
37075 | M = Ratio * M + i % Ratio; | |||
37076 | assert((M / 16) == (i / 16) && "Lane crossing detected")(static_cast <bool> ((M / 16) == (i / 16) && "Lane crossing detected" ) ? void (0) : __assert_fail ("(M / 16) == (i / 16) && \"Lane crossing detected\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37076, __extension__ __PRETTY_FUNCTION__)); | |||
37077 | PSHUFBMask.push_back(DAG.getConstant(M, DL, MVT::i8)); | |||
37078 | } | |||
37079 | MVT ByteVT = MVT::getVectorVT(MVT::i8, NumBytes); | |||
37080 | Res = CanonicalizeShuffleInput(ByteVT, V1); | |||
37081 | SDValue PSHUFBMaskOp = DAG.getBuildVector(ByteVT, DL, PSHUFBMask); | |||
37082 | Res = DAG.getNode(X86ISD::PSHUFB, DL, ByteVT, Res, PSHUFBMaskOp); | |||
37083 | return DAG.getBitcast(RootVT, Res); | |||
37084 | } | |||
37085 | ||||
37086 | // With XOP, if we have a 128-bit binary input shuffle we can always combine | |||
37087 | // to VPPERM. We match the depth requirement of PSHUFB - VPPERM is never | |||
37088 | // slower than PSHUFB on targets that support both. | |||
37089 | if (AllowVariablePerLaneMask && RootVT.is128BitVector() && | |||
37090 | Subtarget.hasXOP()) { | |||
37091 | // VPPERM Mask Operation | |||
37092 | // Bits[4:0] - Byte Index (0 - 31) | |||
37093 | // Bits[7:5] - Permute Operation (0 - Source byte, 4 - ZERO) | |||
37094 | SmallVector<SDValue, 16> VPPERMMask; | |||
37095 | int NumBytes = 16; | |||
37096 | int Ratio = NumBytes / NumMaskElts; | |||
37097 | for (int i = 0; i < NumBytes; ++i) { | |||
37098 | int M = Mask[i / Ratio]; | |||
37099 | if (M == SM_SentinelUndef) { | |||
37100 | VPPERMMask.push_back(DAG.getUNDEF(MVT::i8)); | |||
37101 | continue; | |||
37102 | } | |||
37103 | if (M == SM_SentinelZero) { | |||
37104 | VPPERMMask.push_back(DAG.getConstant(0x80, DL, MVT::i8)); | |||
37105 | continue; | |||
37106 | } | |||
37107 | M = Ratio * M + i % Ratio; | |||
37108 | VPPERMMask.push_back(DAG.getConstant(M, DL, MVT::i8)); | |||
37109 | } | |||
37110 | MVT ByteVT = MVT::v16i8; | |||
37111 | V1 = CanonicalizeShuffleInput(ByteVT, V1); | |||
37112 | V2 = CanonicalizeShuffleInput(ByteVT, V2); | |||
37113 | SDValue VPPERMMaskOp = DAG.getBuildVector(ByteVT, DL, VPPERMMask); | |||
37114 | Res = DAG.getNode(X86ISD::VPPERM, DL, ByteVT, V1, V2, VPPERMMaskOp); | |||
37115 | return DAG.getBitcast(RootVT, Res); | |||
37116 | } | |||
37117 | ||||
37118 | // If that failed and either input is extracted then try to combine as a | |||
37119 | // shuffle with the larger type. | |||
37120 | if (SDValue WideShuffle = combineX86ShuffleChainWithExtract( | |||
37121 | Inputs, Root, BaseMask, Depth, HasVariableMask, | |||
37122 | AllowVariableCrossLaneMask, AllowVariablePerLaneMask, DAG, Subtarget)) | |||
37123 | return WideShuffle; | |||
37124 | ||||
37125 | // If we have a dual input shuffle then lower to VPERMV3, | |||
37126 | // (non-VLX will pad to 512-bit shuffles) | |||
37127 | if (!UnaryShuffle && AllowVariablePerLaneMask && !MaskContainsZeros && | |||
37128 | ((Subtarget.hasAVX512() && | |||
37129 | (MaskVT == MVT::v2f64 || MaskVT == MVT::v4f64 || MaskVT == MVT::v8f64 || | |||
37130 | MaskVT == MVT::v2i64 || MaskVT == MVT::v4i64 || MaskVT == MVT::v8i64 || | |||
37131 | MaskVT == MVT::v4f32 || MaskVT == MVT::v4i32 || MaskVT == MVT::v8f32 || | |||
37132 | MaskVT == MVT::v8i32 || MaskVT == MVT::v16f32 || | |||
37133 | MaskVT == MVT::v16i32)) || | |||
37134 | (Subtarget.hasBWI() && AllowBWIVPERMV3 && | |||
37135 | (MaskVT == MVT::v8i16 || MaskVT == MVT::v16i16 || | |||
37136 | MaskVT == MVT::v32i16)) || | |||
37137 | (Subtarget.hasVBMI() && AllowBWIVPERMV3 && | |||
37138 | (MaskVT == MVT::v16i8 || MaskVT == MVT::v32i8 || | |||
37139 | MaskVT == MVT::v64i8)))) { | |||
37140 | V1 = CanonicalizeShuffleInput(MaskVT, V1); | |||
37141 | V2 = CanonicalizeShuffleInput(MaskVT, V2); | |||
37142 | Res = lowerShuffleWithPERMV(DL, MaskVT, Mask, V1, V2, Subtarget, DAG); | |||
37143 | return DAG.getBitcast(RootVT, Res); | |||
37144 | } | |||
37145 | ||||
37146 | // Failed to find any combines. | |||
37147 | return SDValue(); | |||
37148 | } | |||
37149 | ||||
37150 | // Combine an arbitrary chain of shuffles + extract_subvectors into a single | |||
37151 | // instruction if possible. | |||
37152 | // | |||
37153 | // Wrapper for combineX86ShuffleChain that extends the shuffle mask to a larger | |||
37154 | // type size to attempt to combine: | |||
37155 | // shuffle(extract_subvector(x,c1),extract_subvector(y,c2),m1) | |||
37156 | // --> | |||
37157 | // extract_subvector(shuffle(x,y,m2),0) | |||
37158 | static SDValue combineX86ShuffleChainWithExtract( | |||
37159 | ArrayRef<SDValue> Inputs, SDValue Root, ArrayRef<int> BaseMask, int Depth, | |||
37160 | bool HasVariableMask, bool AllowVariableCrossLaneMask, | |||
37161 | bool AllowVariablePerLaneMask, SelectionDAG &DAG, | |||
37162 | const X86Subtarget &Subtarget) { | |||
37163 | unsigned NumMaskElts = BaseMask.size(); | |||
37164 | unsigned NumInputs = Inputs.size(); | |||
37165 | if (NumInputs == 0) | |||
37166 | return SDValue(); | |||
37167 | ||||
37168 | EVT RootVT = Root.getValueType(); | |||
37169 | unsigned RootSizeInBits = RootVT.getSizeInBits(); | |||
37170 | assert((RootSizeInBits % NumMaskElts) == 0 && "Unexpected root shuffle mask")(static_cast <bool> ((RootSizeInBits % NumMaskElts) == 0 && "Unexpected root shuffle mask") ? void (0) : __assert_fail ("(RootSizeInBits % NumMaskElts) == 0 && \"Unexpected root shuffle mask\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37170, __extension__ __PRETTY_FUNCTION__)); | |||
37171 | ||||
37172 | SmallVector<SDValue, 4> WideInputs(Inputs.begin(), Inputs.end()); | |||
37173 | SmallVector<unsigned, 4> Offsets(NumInputs, 0); | |||
37174 | ||||
37175 | // Peek through subvectors. | |||
37176 | // TODO: Support inter-mixed EXTRACT_SUBVECTORs + BITCASTs? | |||
37177 | unsigned WideSizeInBits = RootSizeInBits; | |||
37178 | for (unsigned i = 0; i != NumInputs; ++i) { | |||
37179 | SDValue &Src = WideInputs[i]; | |||
37180 | unsigned &Offset = Offsets[i]; | |||
37181 | Src = peekThroughBitcasts(Src); | |||
37182 | EVT BaseVT = Src.getValueType(); | |||
37183 | while (Src.getOpcode() == ISD::EXTRACT_SUBVECTOR) { | |||
37184 | Offset += Src.getConstantOperandVal(1); | |||
37185 | Src = Src.getOperand(0); | |||
37186 | } | |||
37187 | WideSizeInBits = std::max(WideSizeInBits, | |||
37188 | (unsigned)Src.getValueSizeInBits()); | |||
37189 | assert((Offset % BaseVT.getVectorNumElements()) == 0 &&(static_cast <bool> ((Offset % BaseVT.getVectorNumElements ()) == 0 && "Unexpected subvector extraction") ? void (0) : __assert_fail ("(Offset % BaseVT.getVectorNumElements()) == 0 && \"Unexpected subvector extraction\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37190, __extension__ __PRETTY_FUNCTION__)) | |||
37190 | "Unexpected subvector extraction")(static_cast <bool> ((Offset % BaseVT.getVectorNumElements ()) == 0 && "Unexpected subvector extraction") ? void (0) : __assert_fail ("(Offset % BaseVT.getVectorNumElements()) == 0 && \"Unexpected subvector extraction\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37190, __extension__ __PRETTY_FUNCTION__)); | |||
37191 | Offset /= BaseVT.getVectorNumElements(); | |||
37192 | Offset *= NumMaskElts; | |||
37193 | } | |||
37194 | ||||
37195 | // Bail if we're always extracting from the lowest subvectors, | |||
37196 | // combineX86ShuffleChain should match this for the current width. | |||
37197 | if (llvm::all_of(Offsets, [](unsigned Offset) { return Offset == 0; })) | |||
37198 | return SDValue(); | |||
37199 | ||||
37200 | unsigned Scale = WideSizeInBits / RootSizeInBits; | |||
37201 | assert((WideSizeInBits % RootSizeInBits) == 0 &&(static_cast <bool> ((WideSizeInBits % RootSizeInBits) == 0 && "Unexpected subvector extraction") ? void (0) : __assert_fail ("(WideSizeInBits % RootSizeInBits) == 0 && \"Unexpected subvector extraction\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37202, __extension__ __PRETTY_FUNCTION__)) | |||
37202 | "Unexpected subvector extraction")(static_cast <bool> ((WideSizeInBits % RootSizeInBits) == 0 && "Unexpected subvector extraction") ? void (0) : __assert_fail ("(WideSizeInBits % RootSizeInBits) == 0 && \"Unexpected subvector extraction\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37202, __extension__ __PRETTY_FUNCTION__)); | |||
37203 | ||||
37204 | // If the src vector types aren't the same, see if we can extend | |||
37205 | // them to match each other. | |||
37206 | // TODO: Support different scalar types? | |||
37207 | EVT WideSVT = WideInputs[0].getValueType().getScalarType(); | |||
37208 | if (llvm::any_of(WideInputs, [&WideSVT, &DAG](SDValue Op) { | |||
37209 | return !DAG.getTargetLoweringInfo().isTypeLegal(Op.getValueType()) || | |||
37210 | Op.getValueType().getScalarType() != WideSVT; | |||
37211 | })) | |||
37212 | return SDValue(); | |||
37213 | ||||
37214 | for (SDValue &NewInput : WideInputs) { | |||
37215 | assert((WideSizeInBits % NewInput.getValueSizeInBits()) == 0 &&(static_cast <bool> ((WideSizeInBits % NewInput.getValueSizeInBits ()) == 0 && "Shuffle vector size mismatch") ? void (0 ) : __assert_fail ("(WideSizeInBits % NewInput.getValueSizeInBits()) == 0 && \"Shuffle vector size mismatch\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37216, __extension__ __PRETTY_FUNCTION__)) | |||
37216 | "Shuffle vector size mismatch")(static_cast <bool> ((WideSizeInBits % NewInput.getValueSizeInBits ()) == 0 && "Shuffle vector size mismatch") ? void (0 ) : __assert_fail ("(WideSizeInBits % NewInput.getValueSizeInBits()) == 0 && \"Shuffle vector size mismatch\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37216, __extension__ __PRETTY_FUNCTION__)); | |||
37217 | if (WideSizeInBits > NewInput.getValueSizeInBits()) | |||
37218 | NewInput = widenSubVector(NewInput, false, Subtarget, DAG, | |||
37219 | SDLoc(NewInput), WideSizeInBits); | |||
37220 | assert(WideSizeInBits == NewInput.getValueSizeInBits() &&(static_cast <bool> (WideSizeInBits == NewInput.getValueSizeInBits () && "Unexpected subvector extraction") ? void (0) : __assert_fail ("WideSizeInBits == NewInput.getValueSizeInBits() && \"Unexpected subvector extraction\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37221, __extension__ __PRETTY_FUNCTION__)) | |||
37221 | "Unexpected subvector extraction")(static_cast <bool> (WideSizeInBits == NewInput.getValueSizeInBits () && "Unexpected subvector extraction") ? void (0) : __assert_fail ("WideSizeInBits == NewInput.getValueSizeInBits() && \"Unexpected subvector extraction\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37221, __extension__ __PRETTY_FUNCTION__)); | |||
37222 | } | |||
37223 | ||||
37224 | // Create new mask for larger type. | |||
37225 | for (unsigned i = 1; i != NumInputs; ++i) | |||
37226 | Offsets[i] += i * Scale * NumMaskElts; | |||
37227 | ||||
37228 | SmallVector<int, 64> WideMask(BaseMask.begin(), BaseMask.end()); | |||
37229 | for (int &M : WideMask) { | |||
37230 | if (M < 0) | |||
37231 | continue; | |||
37232 | M = (M % NumMaskElts) + Offsets[M / NumMaskElts]; | |||
37233 | } | |||
37234 | WideMask.append((Scale - 1) * NumMaskElts, SM_SentinelUndef); | |||
37235 | ||||
37236 | // Remove unused/repeated shuffle source ops. | |||
37237 | resolveTargetShuffleInputsAndMask(WideInputs, WideMask); | |||
37238 | assert(!WideInputs.empty() && "Shuffle with no inputs detected")(static_cast <bool> (!WideInputs.empty() && "Shuffle with no inputs detected" ) ? void (0) : __assert_fail ("!WideInputs.empty() && \"Shuffle with no inputs detected\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37238, __extension__ __PRETTY_FUNCTION__)); | |||
37239 | ||||
37240 | if (WideInputs.size() > 2) | |||
37241 | return SDValue(); | |||
37242 | ||||
37243 | // Increase depth for every upper subvector we've peeked through. | |||
37244 | Depth += count_if(Offsets, [](unsigned Offset) { return Offset > 0; }); | |||
37245 | ||||
37246 | // Attempt to combine wider chain. | |||
37247 | // TODO: Can we use a better Root? | |||
37248 | SDValue WideRoot = WideInputs[0]; | |||
37249 | if (SDValue WideShuffle = | |||
37250 | combineX86ShuffleChain(WideInputs, WideRoot, WideMask, Depth, | |||
37251 | HasVariableMask, AllowVariableCrossLaneMask, | |||
37252 | AllowVariablePerLaneMask, DAG, Subtarget)) { | |||
37253 | WideShuffle = | |||
37254 | extractSubVector(WideShuffle, 0, DAG, SDLoc(Root), RootSizeInBits); | |||
37255 | return DAG.getBitcast(RootVT, WideShuffle); | |||
37256 | } | |||
37257 | return SDValue(); | |||
37258 | } | |||
37259 | ||||
37260 | // Canonicalize the combined shuffle mask chain with horizontal ops. | |||
37261 | // NOTE: This may update the Ops and Mask. | |||
37262 | static SDValue canonicalizeShuffleMaskWithHorizOp( | |||
37263 | MutableArrayRef<SDValue> Ops, MutableArrayRef<int> Mask, | |||
37264 | unsigned RootSizeInBits, const SDLoc &DL, SelectionDAG &DAG, | |||
37265 | const X86Subtarget &Subtarget) { | |||
37266 | if (Mask.empty() || Ops.empty()) | |||
37267 | return SDValue(); | |||
37268 | ||||
37269 | SmallVector<SDValue> BC; | |||
37270 | for (SDValue Op : Ops) | |||
37271 | BC.push_back(peekThroughBitcasts(Op)); | |||
37272 | ||||
37273 | // All ops must be the same horizop + type. | |||
37274 | SDValue BC0 = BC[0]; | |||
37275 | EVT VT0 = BC0.getValueType(); | |||
37276 | unsigned Opcode0 = BC0.getOpcode(); | |||
37277 | if (VT0.getSizeInBits() != RootSizeInBits || llvm::any_of(BC, [&](SDValue V) { | |||
37278 | return V.getOpcode() != Opcode0 || V.getValueType() != VT0; | |||
37279 | })) | |||
37280 | return SDValue(); | |||
37281 | ||||
37282 | bool isHoriz = (Opcode0 == X86ISD::FHADD || Opcode0 == X86ISD::HADD || | |||
37283 | Opcode0 == X86ISD::FHSUB || Opcode0 == X86ISD::HSUB); | |||
37284 | bool isPack = (Opcode0 == X86ISD::PACKSS || Opcode0 == X86ISD::PACKUS); | |||
37285 | if (!isHoriz && !isPack) | |||
37286 | return SDValue(); | |||
37287 | ||||
37288 | // Do all ops have a single use? | |||
37289 | bool OneUseOps = llvm::all_of(Ops, [](SDValue Op) { | |||
37290 | return Op.hasOneUse() && | |||
37291 | peekThroughBitcasts(Op) == peekThroughOneUseBitcasts(Op); | |||
37292 | }); | |||
37293 | ||||
37294 | int NumElts = VT0.getVectorNumElements(); | |||
37295 | int NumLanes = VT0.getSizeInBits() / 128; | |||
37296 | int NumEltsPerLane = NumElts / NumLanes; | |||
37297 | int NumHalfEltsPerLane = NumEltsPerLane / 2; | |||
37298 | MVT SrcVT = BC0.getOperand(0).getSimpleValueType(); | |||
37299 | unsigned EltSizeInBits = RootSizeInBits / Mask.size(); | |||
37300 | ||||
37301 | if (NumEltsPerLane >= 4 && | |||
37302 | (isPack || shouldUseHorizontalOp(Ops.size() == 1, DAG, Subtarget))) { | |||
37303 | SmallVector<int> LaneMask, ScaledMask; | |||
37304 | if (isRepeatedTargetShuffleMask(128, EltSizeInBits, Mask, LaneMask) && | |||
37305 | scaleShuffleElements(LaneMask, 4, ScaledMask)) { | |||
37306 | // See if we can remove the shuffle by resorting the HOP chain so that | |||
37307 | // the HOP args are pre-shuffled. | |||
37308 | // TODO: Generalize to any sized/depth chain. | |||
37309 | // TODO: Add support for PACKSS/PACKUS. | |||
37310 | if (isHoriz) { | |||
37311 | // Attempt to find a HOP(HOP(X,Y),HOP(Z,W)) source operand. | |||
37312 | auto GetHOpSrc = [&](int M) { | |||
37313 | if (M == SM_SentinelUndef) | |||
37314 | return DAG.getUNDEF(VT0); | |||
37315 | if (M == SM_SentinelZero) | |||
37316 | return getZeroVector(VT0.getSimpleVT(), Subtarget, DAG, DL); | |||
37317 | SDValue Src0 = BC[M / 4]; | |||
37318 | SDValue Src1 = Src0.getOperand((M % 4) >= 2); | |||
37319 | if (Src1.getOpcode() == Opcode0 && Src0->isOnlyUserOf(Src1.getNode())) | |||
37320 | return Src1.getOperand(M % 2); | |||
37321 | return SDValue(); | |||
37322 | }; | |||
37323 | SDValue M0 = GetHOpSrc(ScaledMask[0]); | |||
37324 | SDValue M1 = GetHOpSrc(ScaledMask[1]); | |||
37325 | SDValue M2 = GetHOpSrc(ScaledMask[2]); | |||
37326 | SDValue M3 = GetHOpSrc(ScaledMask[3]); | |||
37327 | if (M0 && M1 && M2 && M3) { | |||
37328 | SDValue LHS = DAG.getNode(Opcode0, DL, SrcVT, M0, M1); | |||
37329 | SDValue RHS = DAG.getNode(Opcode0, DL, SrcVT, M2, M3); | |||
37330 | return DAG.getNode(Opcode0, DL, VT0, LHS, RHS); | |||
37331 | } | |||
37332 | } | |||
37333 | // shuffle(hop(x,y),hop(z,w)) -> permute(hop(x,z)) etc. | |||
37334 | if (Ops.size() >= 2) { | |||
37335 | SDValue LHS, RHS; | |||
37336 | auto GetHOpSrc = [&](int M, int &OutM) { | |||
37337 | // TODO: Support SM_SentinelZero | |||
37338 | if (M < 0) | |||
37339 | return M == SM_SentinelUndef; | |||
37340 | SDValue Src = BC[M / 4].getOperand((M % 4) >= 2); | |||
37341 | if (!LHS || LHS == Src) { | |||
37342 | LHS = Src; | |||
37343 | OutM = (M % 2); | |||
37344 | return true; | |||
37345 | } | |||
37346 | if (!RHS || RHS == Src) { | |||
37347 | RHS = Src; | |||
37348 | OutM = (M % 2) + 2; | |||
37349 | return true; | |||
37350 | } | |||
37351 | return false; | |||
37352 | }; | |||
37353 | int PostMask[4] = {-1, -1, -1, -1}; | |||
37354 | if (GetHOpSrc(ScaledMask[0], PostMask[0]) && | |||
37355 | GetHOpSrc(ScaledMask[1], PostMask[1]) && | |||
37356 | GetHOpSrc(ScaledMask[2], PostMask[2]) && | |||
37357 | GetHOpSrc(ScaledMask[3], PostMask[3])) { | |||
37358 | LHS = DAG.getBitcast(SrcVT, LHS); | |||
37359 | RHS = DAG.getBitcast(SrcVT, RHS ? RHS : LHS); | |||
37360 | SDValue Res = DAG.getNode(Opcode0, DL, VT0, LHS, RHS); | |||
37361 | // Use SHUFPS for the permute so this will work on SSE3 targets, | |||
37362 | // shuffle combining and domain handling will simplify this later on. | |||
37363 | MVT ShuffleVT = MVT::getVectorVT(MVT::f32, RootSizeInBits / 32); | |||
37364 | Res = DAG.getBitcast(ShuffleVT, Res); | |||
37365 | return DAG.getNode(X86ISD::SHUFP, DL, ShuffleVT, Res, Res, | |||
37366 | getV4X86ShuffleImm8ForMask(PostMask, DL, DAG)); | |||
37367 | } | |||
37368 | } | |||
37369 | } | |||
37370 | } | |||
37371 | ||||
37372 | if (2 < Ops.size()) | |||
37373 | return SDValue(); | |||
37374 | ||||
37375 | SDValue BC1 = BC[BC.size() - 1]; | |||
37376 | if (Mask.size() == VT0.getVectorNumElements()) { | |||
37377 | // Canonicalize binary shuffles of horizontal ops that use the | |||
37378 | // same sources to an unary shuffle. | |||
37379 | // TODO: Try to perform this fold even if the shuffle remains. | |||
37380 | if (Ops.size() == 2) { | |||
37381 | auto ContainsOps = [](SDValue HOp, SDValue Op) { | |||
37382 | return Op == HOp.getOperand(0) || Op == HOp.getOperand(1); | |||
37383 | }; | |||
37384 | // Commute if all BC0's ops are contained in BC1. | |||
37385 | if (ContainsOps(BC1, BC0.getOperand(0)) && | |||
37386 | ContainsOps(BC1, BC0.getOperand(1))) { | |||
37387 | ShuffleVectorSDNode::commuteMask(Mask); | |||
37388 | std::swap(Ops[0], Ops[1]); | |||
37389 | std::swap(BC0, BC1); | |||
37390 | } | |||
37391 | ||||
37392 | // If BC1 can be represented by BC0, then convert to unary shuffle. | |||
37393 | if (ContainsOps(BC0, BC1.getOperand(0)) && | |||
37394 | ContainsOps(BC0, BC1.getOperand(1))) { | |||
37395 | for (int &M : Mask) { | |||
37396 | if (M < NumElts) // BC0 element or UNDEF/Zero sentinel. | |||
37397 | continue; | |||
37398 | int SubLane = ((M % NumEltsPerLane) >= NumHalfEltsPerLane) ? 1 : 0; | |||
37399 | M -= NumElts + (SubLane * NumHalfEltsPerLane); | |||
37400 | if (BC1.getOperand(SubLane) != BC0.getOperand(0)) | |||
37401 | M += NumHalfEltsPerLane; | |||
37402 | } | |||
37403 | } | |||
37404 | } | |||
37405 | ||||
37406 | // Canonicalize unary horizontal ops to only refer to lower halves. | |||
37407 | for (int i = 0; i != NumElts; ++i) { | |||
37408 | int &M = Mask[i]; | |||
37409 | if (isUndefOrZero(M)) | |||
37410 | continue; | |||
37411 | if (M < NumElts && BC0.getOperand(0) == BC0.getOperand(1) && | |||
37412 | (M % NumEltsPerLane) >= NumHalfEltsPerLane) | |||
37413 | M -= NumHalfEltsPerLane; | |||
37414 | if (NumElts <= M && BC1.getOperand(0) == BC1.getOperand(1) && | |||
37415 | (M % NumEltsPerLane) >= NumHalfEltsPerLane) | |||
37416 | M -= NumHalfEltsPerLane; | |||
37417 | } | |||
37418 | } | |||
37419 | ||||
37420 | // Combine binary shuffle of 2 similar 'Horizontal' instructions into a | |||
37421 | // single instruction. Attempt to match a v2X64 repeating shuffle pattern that | |||
37422 | // represents the LHS/RHS inputs for the lower/upper halves. | |||
37423 | SmallVector<int, 16> TargetMask128, WideMask128; | |||
37424 | if (isRepeatedTargetShuffleMask(128, EltSizeInBits, Mask, TargetMask128) && | |||
37425 | scaleShuffleElements(TargetMask128, 2, WideMask128)) { | |||
37426 | assert(isUndefOrZeroOrInRange(WideMask128, 0, 4) && "Illegal shuffle")(static_cast <bool> (isUndefOrZeroOrInRange(WideMask128 , 0, 4) && "Illegal shuffle") ? void (0) : __assert_fail ("isUndefOrZeroOrInRange(WideMask128, 0, 4) && \"Illegal shuffle\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37426, __extension__ __PRETTY_FUNCTION__)); | |||
37427 | bool SingleOp = (Ops.size() == 1); | |||
37428 | if (isPack || OneUseOps || | |||
37429 | shouldUseHorizontalOp(SingleOp, DAG, Subtarget)) { | |||
37430 | SDValue Lo = isInRange(WideMask128[0], 0, 2) ? BC0 : BC1; | |||
37431 | SDValue Hi = isInRange(WideMask128[1], 0, 2) ? BC0 : BC1; | |||
37432 | Lo = Lo.getOperand(WideMask128[0] & 1); | |||
37433 | Hi = Hi.getOperand(WideMask128[1] & 1); | |||
37434 | if (SingleOp) { | |||
37435 | SDValue Undef = DAG.getUNDEF(SrcVT); | |||
37436 | SDValue Zero = getZeroVector(SrcVT, Subtarget, DAG, DL); | |||
37437 | Lo = (WideMask128[0] == SM_SentinelZero ? Zero : Lo); | |||
37438 | Hi = (WideMask128[1] == SM_SentinelZero ? Zero : Hi); | |||
37439 | Lo = (WideMask128[0] == SM_SentinelUndef ? Undef : Lo); | |||
37440 | Hi = (WideMask128[1] == SM_SentinelUndef ? Undef : Hi); | |||
37441 | } | |||
37442 | return DAG.getNode(Opcode0, DL, VT0, Lo, Hi); | |||
37443 | } | |||
37444 | } | |||
37445 | ||||
37446 | return SDValue(); | |||
37447 | } | |||
37448 | ||||
37449 | // Attempt to constant fold all of the constant source ops. | |||
37450 | // Returns true if the entire shuffle is folded to a constant. | |||
37451 | // TODO: Extend this to merge multiple constant Ops and update the mask. | |||
37452 | static SDValue combineX86ShufflesConstants(ArrayRef<SDValue> Ops, | |||
37453 | ArrayRef<int> Mask, SDValue Root, | |||
37454 | bool HasVariableMask, | |||
37455 | SelectionDAG &DAG, | |||
37456 | const X86Subtarget &Subtarget) { | |||
37457 | MVT VT = Root.getSimpleValueType(); | |||
37458 | ||||
37459 | unsigned SizeInBits = VT.getSizeInBits(); | |||
37460 | unsigned NumMaskElts = Mask.size(); | |||
37461 | unsigned MaskSizeInBits = SizeInBits / NumMaskElts; | |||
37462 | unsigned NumOps = Ops.size(); | |||
37463 | ||||
37464 | // Extract constant bits from each source op. | |||
37465 | bool OneUseConstantOp = false; | |||
37466 | SmallVector<APInt, 16> UndefEltsOps(NumOps); | |||
37467 | SmallVector<SmallVector<APInt, 16>, 16> RawBitsOps(NumOps); | |||
37468 | for (unsigned i = 0; i != NumOps; ++i) { | |||
37469 | SDValue SrcOp = Ops[i]; | |||
37470 | OneUseConstantOp |= SrcOp.hasOneUse(); | |||
37471 | if (!getTargetConstantBitsFromNode(SrcOp, MaskSizeInBits, UndefEltsOps[i], | |||
37472 | RawBitsOps[i])) | |||
37473 | return SDValue(); | |||
37474 | } | |||
37475 | ||||
37476 | // Only fold if at least one of the constants is only used once or | |||
37477 | // the combined shuffle has included a variable mask shuffle, this | |||
37478 | // is to avoid constant pool bloat. | |||
37479 | if (!OneUseConstantOp && !HasVariableMask) | |||
37480 | return SDValue(); | |||
37481 | ||||
37482 | // Shuffle the constant bits according to the mask. | |||
37483 | SDLoc DL(Root); | |||
37484 | APInt UndefElts(NumMaskElts, 0); | |||
37485 | APInt ZeroElts(NumMaskElts, 0); | |||
37486 | APInt ConstantElts(NumMaskElts, 0); | |||
37487 | SmallVector<APInt, 8> ConstantBitData(NumMaskElts, | |||
37488 | APInt::getNullValue(MaskSizeInBits)); | |||
37489 | for (unsigned i = 0; i != NumMaskElts; ++i) { | |||
37490 | int M = Mask[i]; | |||
37491 | if (M == SM_SentinelUndef) { | |||
37492 | UndefElts.setBit(i); | |||
37493 | continue; | |||
37494 | } else if (M == SM_SentinelZero) { | |||
37495 | ZeroElts.setBit(i); | |||
37496 | continue; | |||
37497 | } | |||
37498 | assert(0 <= M && M < (int)(NumMaskElts * NumOps))(static_cast <bool> (0 <= M && M < (int)( NumMaskElts * NumOps)) ? void (0) : __assert_fail ("0 <= M && M < (int)(NumMaskElts * NumOps)" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37498, __extension__ __PRETTY_FUNCTION__)); | |||
37499 | ||||
37500 | unsigned SrcOpIdx = (unsigned)M / NumMaskElts; | |||
37501 | unsigned SrcMaskIdx = (unsigned)M % NumMaskElts; | |||
37502 | ||||
37503 | auto &SrcUndefElts = UndefEltsOps[SrcOpIdx]; | |||
37504 | if (SrcUndefElts[SrcMaskIdx]) { | |||
37505 | UndefElts.setBit(i); | |||
37506 | continue; | |||
37507 | } | |||
37508 | ||||
37509 | auto &SrcEltBits = RawBitsOps[SrcOpIdx]; | |||
37510 | APInt &Bits = SrcEltBits[SrcMaskIdx]; | |||
37511 | if (!Bits) { | |||
37512 | ZeroElts.setBit(i); | |||
37513 | continue; | |||
37514 | } | |||
37515 | ||||
37516 | ConstantElts.setBit(i); | |||
37517 | ConstantBitData[i] = Bits; | |||
37518 | } | |||
37519 | assert((UndefElts | ZeroElts | ConstantElts).isAllOnesValue())(static_cast <bool> ((UndefElts | ZeroElts | ConstantElts ).isAllOnesValue()) ? void (0) : __assert_fail ("(UndefElts | ZeroElts | ConstantElts).isAllOnesValue()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37519, __extension__ __PRETTY_FUNCTION__)); | |||
37520 | ||||
37521 | // Attempt to create a zero vector. | |||
37522 | if ((UndefElts | ZeroElts).isAllOnesValue()) | |||
37523 | return getZeroVector(Root.getSimpleValueType(), Subtarget, DAG, DL); | |||
37524 | ||||
37525 | // Create the constant data. | |||
37526 | MVT MaskSVT; | |||
37527 | if (VT.isFloatingPoint() && (MaskSizeInBits == 32 || MaskSizeInBits == 64)) | |||
37528 | MaskSVT = MVT::getFloatingPointVT(MaskSizeInBits); | |||
37529 | else | |||
37530 | MaskSVT = MVT::getIntegerVT(MaskSizeInBits); | |||
37531 | ||||
37532 | MVT MaskVT = MVT::getVectorVT(MaskSVT, NumMaskElts); | |||
37533 | if (!DAG.getTargetLoweringInfo().isTypeLegal(MaskVT)) | |||
37534 | return SDValue(); | |||
37535 | ||||
37536 | SDValue CstOp = getConstVector(ConstantBitData, UndefElts, MaskVT, DAG, DL); | |||
37537 | return DAG.getBitcast(VT, CstOp); | |||
37538 | } | |||
37539 | ||||
37540 | namespace llvm { | |||
37541 | namespace X86 { | |||
37542 | enum { | |||
37543 | MaxShuffleCombineDepth = 8 | |||
37544 | }; | |||
37545 | } | |||
37546 | } // namespace llvm | |||
37547 | ||||
37548 | /// Fully generic combining of x86 shuffle instructions. | |||
37549 | /// | |||
37550 | /// This should be the last combine run over the x86 shuffle instructions. Once | |||
37551 | /// they have been fully optimized, this will recursively consider all chains | |||
37552 | /// of single-use shuffle instructions, build a generic model of the cumulative | |||
37553 | /// shuffle operation, and check for simpler instructions which implement this | |||
37554 | /// operation. We use this primarily for two purposes: | |||
37555 | /// | |||
37556 | /// 1) Collapse generic shuffles to specialized single instructions when | |||
37557 | /// equivalent. In most cases, this is just an encoding size win, but | |||
37558 | /// sometimes we will collapse multiple generic shuffles into a single | |||
37559 | /// special-purpose shuffle. | |||
37560 | /// 2) Look for sequences of shuffle instructions with 3 or more total | |||
37561 | /// instructions, and replace them with the slightly more expensive SSSE3 | |||
37562 | /// PSHUFB instruction if available. We do this as the last combining step | |||
37563 | /// to ensure we avoid using PSHUFB if we can implement the shuffle with | |||
37564 | /// a suitable short sequence of other instructions. The PSHUFB will either | |||
37565 | /// use a register or have to read from memory and so is slightly (but only | |||
37566 | /// slightly) more expensive than the other shuffle instructions. | |||
37567 | /// | |||
37568 | /// Because this is inherently a quadratic operation (for each shuffle in | |||
37569 | /// a chain, we recurse up the chain), the depth is limited to 8 instructions. | |||
37570 | /// This should never be an issue in practice as the shuffle lowering doesn't | |||
37571 | /// produce sequences of more than 8 instructions. | |||
37572 | /// | |||
37573 | /// FIXME: We will currently miss some cases where the redundant shuffling | |||
37574 | /// would simplify under the threshold for PSHUFB formation because of | |||
37575 | /// combine-ordering. To fix this, we should do the redundant instruction | |||
37576 | /// combining in this recursive walk. | |||
37577 | static SDValue combineX86ShufflesRecursively( | |||
37578 | ArrayRef<SDValue> SrcOps, int SrcOpIndex, SDValue Root, | |||
37579 | ArrayRef<int> RootMask, ArrayRef<const SDNode *> SrcNodes, unsigned Depth, | |||
37580 | unsigned MaxDepth, bool HasVariableMask, bool AllowVariableCrossLaneMask, | |||
37581 | bool AllowVariablePerLaneMask, SelectionDAG &DAG, | |||
37582 | const X86Subtarget &Subtarget) { | |||
37583 | assert(RootMask.size() > 0 &&(static_cast <bool> (RootMask.size() > 0 && ( RootMask.size() > 1 || (RootMask[0] == 0 && SrcOpIndex == 0)) && "Illegal shuffle root mask") ? void (0) : __assert_fail ("RootMask.size() > 0 && (RootMask.size() > 1 || (RootMask[0] == 0 && SrcOpIndex == 0)) && \"Illegal shuffle root mask\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37585, __extension__ __PRETTY_FUNCTION__)) | |||
37584 | (RootMask.size() > 1 || (RootMask[0] == 0 && SrcOpIndex == 0)) &&(static_cast <bool> (RootMask.size() > 0 && ( RootMask.size() > 1 || (RootMask[0] == 0 && SrcOpIndex == 0)) && "Illegal shuffle root mask") ? void (0) : __assert_fail ("RootMask.size() > 0 && (RootMask.size() > 1 || (RootMask[0] == 0 && SrcOpIndex == 0)) && \"Illegal shuffle root mask\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37585, __extension__ __PRETTY_FUNCTION__)) | |||
37585 | "Illegal shuffle root mask")(static_cast <bool> (RootMask.size() > 0 && ( RootMask.size() > 1 || (RootMask[0] == 0 && SrcOpIndex == 0)) && "Illegal shuffle root mask") ? void (0) : __assert_fail ("RootMask.size() > 0 && (RootMask.size() > 1 || (RootMask[0] == 0 && SrcOpIndex == 0)) && \"Illegal shuffle root mask\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37585, __extension__ __PRETTY_FUNCTION__)); | |||
37586 | assert(Root.getSimpleValueType().isVector() &&(static_cast <bool> (Root.getSimpleValueType().isVector () && "Shuffles operate on vector types!") ? void (0) : __assert_fail ("Root.getSimpleValueType().isVector() && \"Shuffles operate on vector types!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37587, __extension__ __PRETTY_FUNCTION__)) | |||
37587 | "Shuffles operate on vector types!")(static_cast <bool> (Root.getSimpleValueType().isVector () && "Shuffles operate on vector types!") ? void (0) : __assert_fail ("Root.getSimpleValueType().isVector() && \"Shuffles operate on vector types!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37587, __extension__ __PRETTY_FUNCTION__)); | |||
37588 | unsigned RootSizeInBits = Root.getSimpleValueType().getSizeInBits(); | |||
37589 | ||||
37590 | // Bound the depth of our recursive combine because this is ultimately | |||
37591 | // quadratic in nature. | |||
37592 | if (Depth >= MaxDepth) | |||
37593 | return SDValue(); | |||
37594 | ||||
37595 | // Directly rip through bitcasts to find the underlying operand. | |||
37596 | SDValue Op = SrcOps[SrcOpIndex]; | |||
37597 | Op = peekThroughOneUseBitcasts(Op); | |||
37598 | ||||
37599 | EVT VT = Op.getValueType(); | |||
37600 | if (!VT.isVector() || !VT.isSimple()) | |||
37601 | return SDValue(); // Bail if we hit a non-simple non-vector. | |||
37602 | ||||
37603 | // FIXME: Just bail on f16 for now. | |||
37604 | if (VT.getVectorElementType() == MVT::f16) | |||
37605 | return SDValue(); | |||
37606 | ||||
37607 | assert((RootSizeInBits % VT.getSizeInBits()) == 0 &&(static_cast <bool> ((RootSizeInBits % VT.getSizeInBits ()) == 0 && "Can only combine shuffles upto size of the root op." ) ? void (0) : __assert_fail ("(RootSizeInBits % VT.getSizeInBits()) == 0 && \"Can only combine shuffles upto size of the root op.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37608, __extension__ __PRETTY_FUNCTION__)) | |||
37608 | "Can only combine shuffles upto size of the root op.")(static_cast <bool> ((RootSizeInBits % VT.getSizeInBits ()) == 0 && "Can only combine shuffles upto size of the root op." ) ? void (0) : __assert_fail ("(RootSizeInBits % VT.getSizeInBits()) == 0 && \"Can only combine shuffles upto size of the root op.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37608, __extension__ __PRETTY_FUNCTION__)); | |||
37609 | ||||
37610 | // Extract target shuffle mask and resolve sentinels and inputs. | |||
37611 | // TODO - determine Op's demanded elts from RootMask. | |||
37612 | SmallVector<int, 64> OpMask; | |||
37613 | SmallVector<SDValue, 2> OpInputs; | |||
37614 | APInt OpUndef, OpZero; | |||
37615 | APInt OpDemandedElts = APInt::getAllOnesValue(VT.getVectorNumElements()); | |||
37616 | bool IsOpVariableMask = isTargetShuffleVariableMask(Op.getOpcode()); | |||
37617 | if (!getTargetShuffleInputs(Op, OpDemandedElts, OpInputs, OpMask, OpUndef, | |||
37618 | OpZero, DAG, Depth, false)) | |||
37619 | return SDValue(); | |||
37620 | ||||
37621 | // Shuffle inputs must not be larger than the shuffle result. | |||
37622 | // TODO: Relax this for single input faux shuffles (trunc/extract_subvector). | |||
37623 | if (llvm::any_of(OpInputs, [VT](SDValue OpInput) { | |||
37624 | return OpInput.getValueSizeInBits() > VT.getSizeInBits(); | |||
37625 | })) | |||
37626 | return SDValue(); | |||
37627 | ||||
37628 | // If the shuffle result was smaller than the root, we need to adjust the | |||
37629 | // mask indices and pad the mask with undefs. | |||
37630 | if (RootSizeInBits > VT.getSizeInBits()) { | |||
37631 | unsigned NumSubVecs = RootSizeInBits / VT.getSizeInBits(); | |||
37632 | unsigned OpMaskSize = OpMask.size(); | |||
37633 | if (OpInputs.size() > 1) { | |||
37634 | unsigned PaddedMaskSize = NumSubVecs * OpMaskSize; | |||
37635 | for (int &M : OpMask) { | |||
37636 | if (M < 0) | |||
37637 | continue; | |||
37638 | int EltIdx = M % OpMaskSize; | |||
37639 | int OpIdx = M / OpMaskSize; | |||
37640 | M = (PaddedMaskSize * OpIdx) + EltIdx; | |||
37641 | } | |||
37642 | } | |||
37643 | OpZero = OpZero.zext(NumSubVecs * OpMaskSize); | |||
37644 | OpUndef = OpUndef.zext(NumSubVecs * OpMaskSize); | |||
37645 | OpMask.append((NumSubVecs - 1) * OpMaskSize, SM_SentinelUndef); | |||
37646 | } | |||
37647 | ||||
37648 | SmallVector<int, 64> Mask; | |||
37649 | SmallVector<SDValue, 16> Ops; | |||
37650 | ||||
37651 | // We don't need to merge masks if the root is empty. | |||
37652 | bool EmptyRoot = (Depth == 0) && (RootMask.size() == 1); | |||
37653 | if (EmptyRoot) { | |||
37654 | // Only resolve zeros if it will remove an input, otherwise we might end | |||
37655 | // up in an infinite loop. | |||
37656 | bool ResolveKnownZeros = true; | |||
37657 | if (!OpZero.isNullValue()) { | |||
37658 | APInt UsedInputs = APInt::getNullValue(OpInputs.size()); | |||
37659 | for (int i = 0, e = OpMask.size(); i != e; ++i) { | |||
37660 | int M = OpMask[i]; | |||
37661 | if (OpUndef[i] || OpZero[i] || isUndefOrZero(M)) | |||
37662 | continue; | |||
37663 | UsedInputs.setBit(M / OpMask.size()); | |||
37664 | if (UsedInputs.isAllOnesValue()) { | |||
37665 | ResolveKnownZeros = false; | |||
37666 | break; | |||
37667 | } | |||
37668 | } | |||
37669 | } | |||
37670 | resolveTargetShuffleFromZeroables(OpMask, OpUndef, OpZero, | |||
37671 | ResolveKnownZeros); | |||
37672 | ||||
37673 | Mask = OpMask; | |||
37674 | Ops.append(OpInputs.begin(), OpInputs.end()); | |||
37675 | } else { | |||
37676 | resolveTargetShuffleFromZeroables(OpMask, OpUndef, OpZero); | |||
37677 | ||||
37678 | // Add the inputs to the Ops list, avoiding duplicates. | |||
37679 | Ops.append(SrcOps.begin(), SrcOps.end()); | |||
37680 | ||||
37681 | auto AddOp = [&Ops](SDValue Input, int InsertionPoint) -> int { | |||
37682 | // Attempt to find an existing match. | |||
37683 | SDValue InputBC = peekThroughBitcasts(Input); | |||
37684 | for (int i = 0, e = Ops.size(); i < e; ++i) | |||
37685 | if (InputBC == peekThroughBitcasts(Ops[i])) | |||
37686 | return i; | |||
37687 | // Match failed - should we replace an existing Op? | |||
37688 | if (InsertionPoint >= 0) { | |||
37689 | Ops[InsertionPoint] = Input; | |||
37690 | return InsertionPoint; | |||
37691 | } | |||
37692 | // Add to the end of the Ops list. | |||
37693 | Ops.push_back(Input); | |||
37694 | return Ops.size() - 1; | |||
37695 | }; | |||
37696 | ||||
37697 | SmallVector<int, 2> OpInputIdx; | |||
37698 | for (SDValue OpInput : OpInputs) | |||
37699 | OpInputIdx.push_back( | |||
37700 | AddOp(OpInput, OpInputIdx.empty() ? SrcOpIndex : -1)); | |||
37701 | ||||
37702 | assert(((RootMask.size() > OpMask.size() &&(static_cast <bool> (((RootMask.size() > OpMask.size () && RootMask.size() % OpMask.size() == 0) || (OpMask .size() > RootMask.size() && OpMask.size() % RootMask .size() == 0) || OpMask.size() == RootMask.size()) && "The smaller number of elements must divide the larger.") ? void (0) : __assert_fail ("((RootMask.size() > OpMask.size() && RootMask.size() % OpMask.size() == 0) || (OpMask.size() > RootMask.size() && OpMask.size() % RootMask.size() == 0) || OpMask.size() == RootMask.size()) && \"The smaller number of elements must divide the larger.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37707, __extension__ __PRETTY_FUNCTION__)) | |||
37703 | RootMask.size() % OpMask.size() == 0) ||(static_cast <bool> (((RootMask.size() > OpMask.size () && RootMask.size() % OpMask.size() == 0) || (OpMask .size() > RootMask.size() && OpMask.size() % RootMask .size() == 0) || OpMask.size() == RootMask.size()) && "The smaller number of elements must divide the larger.") ? void (0) : __assert_fail ("((RootMask.size() > OpMask.size() && RootMask.size() % OpMask.size() == 0) || (OpMask.size() > RootMask.size() && OpMask.size() % RootMask.size() == 0) || OpMask.size() == RootMask.size()) && \"The smaller number of elements must divide the larger.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37707, __extension__ __PRETTY_FUNCTION__)) | |||
37704 | (OpMask.size() > RootMask.size() &&(static_cast <bool> (((RootMask.size() > OpMask.size () && RootMask.size() % OpMask.size() == 0) || (OpMask .size() > RootMask.size() && OpMask.size() % RootMask .size() == 0) || OpMask.size() == RootMask.size()) && "The smaller number of elements must divide the larger.") ? void (0) : __assert_fail ("((RootMask.size() > OpMask.size() && RootMask.size() % OpMask.size() == 0) || (OpMask.size() > RootMask.size() && OpMask.size() % RootMask.size() == 0) || OpMask.size() == RootMask.size()) && \"The smaller number of elements must divide the larger.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37707, __extension__ __PRETTY_FUNCTION__)) | |||
37705 | OpMask.size() % RootMask.size() == 0) ||(static_cast <bool> (((RootMask.size() > OpMask.size () && RootMask.size() % OpMask.size() == 0) || (OpMask .size() > RootMask.size() && OpMask.size() % RootMask .size() == 0) || OpMask.size() == RootMask.size()) && "The smaller number of elements must divide the larger.") ? void (0) : __assert_fail ("((RootMask.size() > OpMask.size() && RootMask.size() % OpMask.size() == 0) || (OpMask.size() > RootMask.size() && OpMask.size() % RootMask.size() == 0) || OpMask.size() == RootMask.size()) && \"The smaller number of elements must divide the larger.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37707, __extension__ __PRETTY_FUNCTION__)) | |||
37706 | OpMask.size() == RootMask.size()) &&(static_cast <bool> (((RootMask.size() > OpMask.size () && RootMask.size() % OpMask.size() == 0) || (OpMask .size() > RootMask.size() && OpMask.size() % RootMask .size() == 0) || OpMask.size() == RootMask.size()) && "The smaller number of elements must divide the larger.") ? void (0) : __assert_fail ("((RootMask.size() > OpMask.size() && RootMask.size() % OpMask.size() == 0) || (OpMask.size() > RootMask.size() && OpMask.size() % RootMask.size() == 0) || OpMask.size() == RootMask.size()) && \"The smaller number of elements must divide the larger.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37707, __extension__ __PRETTY_FUNCTION__)) | |||
37707 | "The smaller number of elements must divide the larger.")(static_cast <bool> (((RootMask.size() > OpMask.size () && RootMask.size() % OpMask.size() == 0) || (OpMask .size() > RootMask.size() && OpMask.size() % RootMask .size() == 0) || OpMask.size() == RootMask.size()) && "The smaller number of elements must divide the larger.") ? void (0) : __assert_fail ("((RootMask.size() > OpMask.size() && RootMask.size() % OpMask.size() == 0) || (OpMask.size() > RootMask.size() && OpMask.size() % RootMask.size() == 0) || OpMask.size() == RootMask.size()) && \"The smaller number of elements must divide the larger.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37707, __extension__ __PRETTY_FUNCTION__)); | |||
37708 | ||||
37709 | // This function can be performance-critical, so we rely on the power-of-2 | |||
37710 | // knowledge that we have about the mask sizes to replace div/rem ops with | |||
37711 | // bit-masks and shifts. | |||
37712 | assert(isPowerOf2_32(RootMask.size()) &&(static_cast <bool> (isPowerOf2_32(RootMask.size()) && "Non-power-of-2 shuffle mask sizes") ? void (0) : __assert_fail ("isPowerOf2_32(RootMask.size()) && \"Non-power-of-2 shuffle mask sizes\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37713, __extension__ __PRETTY_FUNCTION__)) | |||
37713 | "Non-power-of-2 shuffle mask sizes")(static_cast <bool> (isPowerOf2_32(RootMask.size()) && "Non-power-of-2 shuffle mask sizes") ? void (0) : __assert_fail ("isPowerOf2_32(RootMask.size()) && \"Non-power-of-2 shuffle mask sizes\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37713, __extension__ __PRETTY_FUNCTION__)); | |||
37714 | assert(isPowerOf2_32(OpMask.size()) && "Non-power-of-2 shuffle mask sizes")(static_cast <bool> (isPowerOf2_32(OpMask.size()) && "Non-power-of-2 shuffle mask sizes") ? void (0) : __assert_fail ("isPowerOf2_32(OpMask.size()) && \"Non-power-of-2 shuffle mask sizes\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37714, __extension__ __PRETTY_FUNCTION__)); | |||
37715 | unsigned RootMaskSizeLog2 = countTrailingZeros(RootMask.size()); | |||
37716 | unsigned OpMaskSizeLog2 = countTrailingZeros(OpMask.size()); | |||
37717 | ||||
37718 | unsigned MaskWidth = std::max<unsigned>(OpMask.size(), RootMask.size()); | |||
37719 | unsigned RootRatio = | |||
37720 | std::max<unsigned>(1, OpMask.size() >> RootMaskSizeLog2); | |||
37721 | unsigned OpRatio = std::max<unsigned>(1, RootMask.size() >> OpMaskSizeLog2); | |||
37722 | assert((RootRatio == 1 || OpRatio == 1) &&(static_cast <bool> ((RootRatio == 1 || OpRatio == 1) && "Must not have a ratio for both incoming and op masks!") ? void (0) : __assert_fail ("(RootRatio == 1 || OpRatio == 1) && \"Must not have a ratio for both incoming and op masks!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37723, __extension__ __PRETTY_FUNCTION__)) | |||
37723 | "Must not have a ratio for both incoming and op masks!")(static_cast <bool> ((RootRatio == 1 || OpRatio == 1) && "Must not have a ratio for both incoming and op masks!") ? void (0) : __assert_fail ("(RootRatio == 1 || OpRatio == 1) && \"Must not have a ratio for both incoming and op masks!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37723, __extension__ __PRETTY_FUNCTION__)); | |||
37724 | ||||
37725 | assert(isPowerOf2_32(MaskWidth) && "Non-power-of-2 shuffle mask sizes")(static_cast <bool> (isPowerOf2_32(MaskWidth) && "Non-power-of-2 shuffle mask sizes") ? void (0) : __assert_fail ("isPowerOf2_32(MaskWidth) && \"Non-power-of-2 shuffle mask sizes\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37725, __extension__ __PRETTY_FUNCTION__)); | |||
37726 | assert(isPowerOf2_32(RootRatio) && "Non-power-of-2 shuffle mask sizes")(static_cast <bool> (isPowerOf2_32(RootRatio) && "Non-power-of-2 shuffle mask sizes") ? void (0) : __assert_fail ("isPowerOf2_32(RootRatio) && \"Non-power-of-2 shuffle mask sizes\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37726, __extension__ __PRETTY_FUNCTION__)); | |||
37727 | assert(isPowerOf2_32(OpRatio) && "Non-power-of-2 shuffle mask sizes")(static_cast <bool> (isPowerOf2_32(OpRatio) && "Non-power-of-2 shuffle mask sizes" ) ? void (0) : __assert_fail ("isPowerOf2_32(OpRatio) && \"Non-power-of-2 shuffle mask sizes\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37727, __extension__ __PRETTY_FUNCTION__)); | |||
37728 | unsigned RootRatioLog2 = countTrailingZeros(RootRatio); | |||
37729 | unsigned OpRatioLog2 = countTrailingZeros(OpRatio); | |||
37730 | ||||
37731 | Mask.resize(MaskWidth, SM_SentinelUndef); | |||
37732 | ||||
37733 | // Merge this shuffle operation's mask into our accumulated mask. Note that | |||
37734 | // this shuffle's mask will be the first applied to the input, followed by | |||
37735 | // the root mask to get us all the way to the root value arrangement. The | |||
37736 | // reason for this order is that we are recursing up the operation chain. | |||
37737 | for (unsigned i = 0; i < MaskWidth; ++i) { | |||
37738 | unsigned RootIdx = i >> RootRatioLog2; | |||
37739 | if (RootMask[RootIdx] < 0) { | |||
37740 | // This is a zero or undef lane, we're done. | |||
37741 | Mask[i] = RootMask[RootIdx]; | |||
37742 | continue; | |||
37743 | } | |||
37744 | ||||
37745 | unsigned RootMaskedIdx = | |||
37746 | RootRatio == 1 | |||
37747 | ? RootMask[RootIdx] | |||
37748 | : (RootMask[RootIdx] << RootRatioLog2) + (i & (RootRatio - 1)); | |||
37749 | ||||
37750 | // Just insert the scaled root mask value if it references an input other | |||
37751 | // than the SrcOp we're currently inserting. | |||
37752 | if ((RootMaskedIdx < (SrcOpIndex * MaskWidth)) || | |||
37753 | (((SrcOpIndex + 1) * MaskWidth) <= RootMaskedIdx)) { | |||
37754 | Mask[i] = RootMaskedIdx; | |||
37755 | continue; | |||
37756 | } | |||
37757 | ||||
37758 | RootMaskedIdx = RootMaskedIdx & (MaskWidth - 1); | |||
37759 | unsigned OpIdx = RootMaskedIdx >> OpRatioLog2; | |||
37760 | if (OpMask[OpIdx] < 0) { | |||
37761 | // The incoming lanes are zero or undef, it doesn't matter which ones we | |||
37762 | // are using. | |||
37763 | Mask[i] = OpMask[OpIdx]; | |||
37764 | continue; | |||
37765 | } | |||
37766 | ||||
37767 | // Ok, we have non-zero lanes, map them through to one of the Op's inputs. | |||
37768 | unsigned OpMaskedIdx = OpRatio == 1 ? OpMask[OpIdx] | |||
37769 | : (OpMask[OpIdx] << OpRatioLog2) + | |||
37770 | (RootMaskedIdx & (OpRatio - 1)); | |||
37771 | ||||
37772 | OpMaskedIdx = OpMaskedIdx & (MaskWidth - 1); | |||
37773 | int InputIdx = OpMask[OpIdx] / (int)OpMask.size(); | |||
37774 | assert(0 <= OpInputIdx[InputIdx] && "Unknown target shuffle input")(static_cast <bool> (0 <= OpInputIdx[InputIdx] && "Unknown target shuffle input") ? void (0) : __assert_fail ( "0 <= OpInputIdx[InputIdx] && \"Unknown target shuffle input\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37774, __extension__ __PRETTY_FUNCTION__)); | |||
37775 | OpMaskedIdx += OpInputIdx[InputIdx] * MaskWidth; | |||
37776 | ||||
37777 | Mask[i] = OpMaskedIdx; | |||
37778 | } | |||
37779 | } | |||
37780 | ||||
37781 | // Remove unused/repeated shuffle source ops. | |||
37782 | resolveTargetShuffleInputsAndMask(Ops, Mask); | |||
37783 | ||||
37784 | // Handle the all undef/zero/ones cases early. | |||
37785 | if (all_of(Mask, [](int Idx) { return Idx == SM_SentinelUndef; })) | |||
37786 | return DAG.getUNDEF(Root.getValueType()); | |||
37787 | if (all_of(Mask, [](int Idx) { return Idx < 0; })) | |||
37788 | return getZeroVector(Root.getSimpleValueType(), Subtarget, DAG, | |||
37789 | SDLoc(Root)); | |||
37790 | if (Ops.size() == 1 && ISD::isBuildVectorAllOnes(Ops[0].getNode()) && | |||
37791 | none_of(Mask, [](int M) { return M == SM_SentinelZero; })) | |||
37792 | return getOnesVector(Root.getValueType(), DAG, SDLoc(Root)); | |||
37793 | ||||
37794 | assert(!Ops.empty() && "Shuffle with no inputs detected")(static_cast <bool> (!Ops.empty() && "Shuffle with no inputs detected" ) ? void (0) : __assert_fail ("!Ops.empty() && \"Shuffle with no inputs detected\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37794, __extension__ __PRETTY_FUNCTION__)); | |||
37795 | HasVariableMask |= IsOpVariableMask; | |||
37796 | ||||
37797 | // Update the list of shuffle nodes that have been combined so far. | |||
37798 | SmallVector<const SDNode *, 16> CombinedNodes(SrcNodes.begin(), | |||
37799 | SrcNodes.end()); | |||
37800 | CombinedNodes.push_back(Op.getNode()); | |||
37801 | ||||
37802 | // See if we can recurse into each shuffle source op (if it's a target | |||
37803 | // shuffle). The source op should only be generally combined if it either has | |||
37804 | // a single use (i.e. current Op) or all its users have already been combined, | |||
37805 | // if not then we can still combine but should prevent generation of variable | |||
37806 | // shuffles to avoid constant pool bloat. | |||
37807 | // Don't recurse if we already have more source ops than we can combine in | |||
37808 | // the remaining recursion depth. | |||
37809 | if (Ops.size() < (MaxDepth - Depth)) { | |||
37810 | for (int i = 0, e = Ops.size(); i < e; ++i) { | |||
37811 | // For empty roots, we need to resolve zeroable elements before combining | |||
37812 | // them with other shuffles. | |||
37813 | SmallVector<int, 64> ResolvedMask = Mask; | |||
37814 | if (EmptyRoot) | |||
37815 | resolveTargetShuffleFromZeroables(ResolvedMask, OpUndef, OpZero); | |||
37816 | bool AllowCrossLaneVar = false; | |||
37817 | bool AllowPerLaneVar = false; | |||
37818 | if (Ops[i].getNode()->hasOneUse() || | |||
37819 | SDNode::areOnlyUsersOf(CombinedNodes, Ops[i].getNode())) { | |||
37820 | AllowCrossLaneVar = AllowVariableCrossLaneMask; | |||
37821 | AllowPerLaneVar = AllowVariablePerLaneMask; | |||
37822 | } | |||
37823 | if (SDValue Res = combineX86ShufflesRecursively( | |||
37824 | Ops, i, Root, ResolvedMask, CombinedNodes, Depth + 1, MaxDepth, | |||
37825 | HasVariableMask, AllowCrossLaneVar, AllowPerLaneVar, DAG, | |||
37826 | Subtarget)) | |||
37827 | return Res; | |||
37828 | } | |||
37829 | } | |||
37830 | ||||
37831 | // Attempt to constant fold all of the constant source ops. | |||
37832 | if (SDValue Cst = combineX86ShufflesConstants( | |||
37833 | Ops, Mask, Root, HasVariableMask, DAG, Subtarget)) | |||
37834 | return Cst; | |||
37835 | ||||
37836 | // If constant fold failed and we only have constants - then we have | |||
37837 | // multiple uses by a single non-variable shuffle - just bail. | |||
37838 | if (Depth == 0 && llvm::all_of(Ops, [&](SDValue Op) { | |||
37839 | APInt UndefElts; | |||
37840 | SmallVector<APInt> RawBits; | |||
37841 | unsigned EltSizeInBits = RootSizeInBits / Mask.size(); | |||
37842 | return getTargetConstantBitsFromNode(Op, EltSizeInBits, UndefElts, | |||
37843 | RawBits); | |||
37844 | })) { | |||
37845 | return SDValue(); | |||
37846 | } | |||
37847 | ||||
37848 | // Canonicalize the combined shuffle mask chain with horizontal ops. | |||
37849 | // NOTE: This will update the Ops and Mask. | |||
37850 | if (SDValue HOp = canonicalizeShuffleMaskWithHorizOp( | |||
37851 | Ops, Mask, RootSizeInBits, SDLoc(Root), DAG, Subtarget)) | |||
37852 | return DAG.getBitcast(Root.getValueType(), HOp); | |||
37853 | ||||
37854 | // Widen any subvector shuffle inputs we've collected. | |||
37855 | if (any_of(Ops, [RootSizeInBits](SDValue Op) { | |||
37856 | return Op.getValueSizeInBits() < RootSizeInBits; | |||
37857 | })) { | |||
37858 | for (SDValue &Op : Ops) | |||
37859 | if (Op.getValueSizeInBits() < RootSizeInBits) | |||
37860 | Op = widenSubVector(Op, false, Subtarget, DAG, SDLoc(Op), | |||
37861 | RootSizeInBits); | |||
37862 | // Reresolve - we might have repeated subvector sources. | |||
37863 | resolveTargetShuffleInputsAndMask(Ops, Mask); | |||
37864 | } | |||
37865 | ||||
37866 | // We can only combine unary and binary shuffle mask cases. | |||
37867 | if (Ops.size() <= 2) { | |||
37868 | // Minor canonicalization of the accumulated shuffle mask to make it easier | |||
37869 | // to match below. All this does is detect masks with sequential pairs of | |||
37870 | // elements, and shrink them to the half-width mask. It does this in a loop | |||
37871 | // so it will reduce the size of the mask to the minimal width mask which | |||
37872 | // performs an equivalent shuffle. | |||
37873 | while (Mask.size() > 1) { | |||
37874 | SmallVector<int, 64> WidenedMask; | |||
37875 | if (!canWidenShuffleElements(Mask, WidenedMask)) | |||
37876 | break; | |||
37877 | Mask = std::move(WidenedMask); | |||
37878 | } | |||
37879 | ||||
37880 | // Canonicalization of binary shuffle masks to improve pattern matching by | |||
37881 | // commuting the inputs. | |||
37882 | if (Ops.size() == 2 && canonicalizeShuffleMaskWithCommute(Mask)) { | |||
37883 | ShuffleVectorSDNode::commuteMask(Mask); | |||
37884 | std::swap(Ops[0], Ops[1]); | |||
37885 | } | |||
37886 | ||||
37887 | // Finally, try to combine into a single shuffle instruction. | |||
37888 | return combineX86ShuffleChain(Ops, Root, Mask, Depth, HasVariableMask, | |||
37889 | AllowVariableCrossLaneMask, | |||
37890 | AllowVariablePerLaneMask, DAG, Subtarget); | |||
37891 | } | |||
37892 | ||||
37893 | // If that failed and any input is extracted then try to combine as a | |||
37894 | // shuffle with the larger type. | |||
37895 | return combineX86ShuffleChainWithExtract( | |||
37896 | Ops, Root, Mask, Depth, HasVariableMask, AllowVariableCrossLaneMask, | |||
37897 | AllowVariablePerLaneMask, DAG, Subtarget); | |||
37898 | } | |||
37899 | ||||
37900 | /// Helper entry wrapper to combineX86ShufflesRecursively. | |||
37901 | static SDValue combineX86ShufflesRecursively(SDValue Op, SelectionDAG &DAG, | |||
37902 | const X86Subtarget &Subtarget) { | |||
37903 | return combineX86ShufflesRecursively( | |||
37904 | {Op}, 0, Op, {0}, {}, /*Depth*/ 0, X86::MaxShuffleCombineDepth, | |||
37905 | /*HasVarMask*/ false, | |||
37906 | /*AllowCrossLaneVarMask*/ true, /*AllowPerLaneVarMask*/ true, DAG, | |||
37907 | Subtarget); | |||
37908 | } | |||
37909 | ||||
37910 | /// Get the PSHUF-style mask from PSHUF node. | |||
37911 | /// | |||
37912 | /// This is a very minor wrapper around getTargetShuffleMask to easy forming v4 | |||
37913 | /// PSHUF-style masks that can be reused with such instructions. | |||
37914 | static SmallVector<int, 4> getPSHUFShuffleMask(SDValue N) { | |||
37915 | MVT VT = N.getSimpleValueType(); | |||
37916 | SmallVector<int, 4> Mask; | |||
37917 | SmallVector<SDValue, 2> Ops; | |||
37918 | bool HaveMask = | |||
37919 | getTargetShuffleMask(N.getNode(), VT, false, Ops, Mask); | |||
37920 | (void)HaveMask; | |||
37921 | assert(HaveMask)(static_cast <bool> (HaveMask) ? void (0) : __assert_fail ("HaveMask", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37921, __extension__ __PRETTY_FUNCTION__)); | |||
37922 | ||||
37923 | // If we have more than 128-bits, only the low 128-bits of shuffle mask | |||
37924 | // matter. Check that the upper masks are repeats and remove them. | |||
37925 | if (VT.getSizeInBits() > 128) { | |||
37926 | int LaneElts = 128 / VT.getScalarSizeInBits(); | |||
37927 | #ifndef NDEBUG | |||
37928 | for (int i = 1, NumLanes = VT.getSizeInBits() / 128; i < NumLanes; ++i) | |||
37929 | for (int j = 0; j < LaneElts; ++j) | |||
37930 | assert(Mask[j] == Mask[i * LaneElts + j] - (LaneElts * i) &&(static_cast <bool> (Mask[j] == Mask[i * LaneElts + j] - (LaneElts * i) && "Mask doesn't repeat in high 128-bit lanes!" ) ? void (0) : __assert_fail ("Mask[j] == Mask[i * LaneElts + j] - (LaneElts * i) && \"Mask doesn't repeat in high 128-bit lanes!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37931, __extension__ __PRETTY_FUNCTION__)) | |||
37931 | "Mask doesn't repeat in high 128-bit lanes!")(static_cast <bool> (Mask[j] == Mask[i * LaneElts + j] - (LaneElts * i) && "Mask doesn't repeat in high 128-bit lanes!" ) ? void (0) : __assert_fail ("Mask[j] == Mask[i * LaneElts + j] - (LaneElts * i) && \"Mask doesn't repeat in high 128-bit lanes!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37931, __extension__ __PRETTY_FUNCTION__)); | |||
37932 | #endif | |||
37933 | Mask.resize(LaneElts); | |||
37934 | } | |||
37935 | ||||
37936 | switch (N.getOpcode()) { | |||
37937 | case X86ISD::PSHUFD: | |||
37938 | return Mask; | |||
37939 | case X86ISD::PSHUFLW: | |||
37940 | Mask.resize(4); | |||
37941 | return Mask; | |||
37942 | case X86ISD::PSHUFHW: | |||
37943 | Mask.erase(Mask.begin(), Mask.begin() + 4); | |||
37944 | for (int &M : Mask) | |||
37945 | M -= 4; | |||
37946 | return Mask; | |||
37947 | default: | |||
37948 | llvm_unreachable("No valid shuffle instruction found!")::llvm::llvm_unreachable_internal("No valid shuffle instruction found!" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37948); | |||
37949 | } | |||
37950 | } | |||
37951 | ||||
37952 | /// Search for a combinable shuffle across a chain ending in pshufd. | |||
37953 | /// | |||
37954 | /// We walk up the chain and look for a combinable shuffle, skipping over | |||
37955 | /// shuffles that we could hoist this shuffle's transformation past without | |||
37956 | /// altering anything. | |||
37957 | static SDValue | |||
37958 | combineRedundantDWordShuffle(SDValue N, MutableArrayRef<int> Mask, | |||
37959 | SelectionDAG &DAG) { | |||
37960 | assert(N.getOpcode() == X86ISD::PSHUFD &&(static_cast <bool> (N.getOpcode() == X86ISD::PSHUFD && "Called with something other than an x86 128-bit half shuffle!" ) ? void (0) : __assert_fail ("N.getOpcode() == X86ISD::PSHUFD && \"Called with something other than an x86 128-bit half shuffle!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37961, __extension__ __PRETTY_FUNCTION__)) | |||
37961 | "Called with something other than an x86 128-bit half shuffle!")(static_cast <bool> (N.getOpcode() == X86ISD::PSHUFD && "Called with something other than an x86 128-bit half shuffle!" ) ? void (0) : __assert_fail ("N.getOpcode() == X86ISD::PSHUFD && \"Called with something other than an x86 128-bit half shuffle!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 37961, __extension__ __PRETTY_FUNCTION__)); | |||
37962 | SDLoc DL(N); | |||
37963 | ||||
37964 | // Walk up a single-use chain looking for a combinable shuffle. Keep a stack | |||
37965 | // of the shuffles in the chain so that we can form a fresh chain to replace | |||
37966 | // this one. | |||
37967 | SmallVector<SDValue, 8> Chain; | |||
37968 | SDValue V = N.getOperand(0); | |||
37969 | for (; V.hasOneUse(); V = V.getOperand(0)) { | |||
37970 | switch (V.getOpcode()) { | |||
37971 | default: | |||
37972 | return SDValue(); // Nothing combined! | |||
37973 | ||||
37974 | case ISD::BITCAST: | |||
37975 | // Skip bitcasts as we always know the type for the target specific | |||
37976 | // instructions. | |||
37977 | continue; | |||
37978 | ||||
37979 | case X86ISD::PSHUFD: | |||
37980 | // Found another dword shuffle. | |||
37981 | break; | |||
37982 | ||||
37983 | case X86ISD::PSHUFLW: | |||
37984 | // Check that the low words (being shuffled) are the identity in the | |||
37985 | // dword shuffle, and the high words are self-contained. | |||
37986 | if (Mask[0] != 0 || Mask[1] != 1 || | |||
37987 | !(Mask[2] >= 2 && Mask[2] < 4 && Mask[3] >= 2 && Mask[3] < 4)) | |||
37988 | return SDValue(); | |||
37989 | ||||
37990 | Chain.push_back(V); | |||
37991 | continue; | |||
37992 | ||||
37993 | case X86ISD::PSHUFHW: | |||
37994 | // Check that the high words (being shuffled) are the identity in the | |||
37995 | // dword shuffle, and the low words are self-contained. | |||
37996 | if (Mask[2] != 2 || Mask[3] != 3 || | |||
37997 | !(Mask[0] >= 0 && Mask[0] < 2 && Mask[1] >= 0 && Mask[1] < 2)) | |||
37998 | return SDValue(); | |||
37999 | ||||
38000 | Chain.push_back(V); | |||
38001 | continue; | |||
38002 | ||||
38003 | case X86ISD::UNPCKL: | |||
38004 | case X86ISD::UNPCKH: | |||
38005 | // For either i8 -> i16 or i16 -> i32 unpacks, we can combine a dword | |||
38006 | // shuffle into a preceding word shuffle. | |||
38007 | if (V.getSimpleValueType().getVectorElementType() != MVT::i8 && | |||
38008 | V.getSimpleValueType().getVectorElementType() != MVT::i16) | |||
38009 | return SDValue(); | |||
38010 | ||||
38011 | // Search for a half-shuffle which we can combine with. | |||
38012 | unsigned CombineOp = | |||
38013 | V.getOpcode() == X86ISD::UNPCKL ? X86ISD::PSHUFLW : X86ISD::PSHUFHW; | |||
38014 | if (V.getOperand(0) != V.getOperand(1) || | |||
38015 | !V->isOnlyUserOf(V.getOperand(0).getNode())) | |||
38016 | return SDValue(); | |||
38017 | Chain.push_back(V); | |||
38018 | V = V.getOperand(0); | |||
38019 | do { | |||
38020 | switch (V.getOpcode()) { | |||
38021 | default: | |||
38022 | return SDValue(); // Nothing to combine. | |||
38023 | ||||
38024 | case X86ISD::PSHUFLW: | |||
38025 | case X86ISD::PSHUFHW: | |||
38026 | if (V.getOpcode() == CombineOp) | |||
38027 | break; | |||
38028 | ||||
38029 | Chain.push_back(V); | |||
38030 | ||||
38031 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
38032 | case ISD::BITCAST: | |||
38033 | V = V.getOperand(0); | |||
38034 | continue; | |||
38035 | } | |||
38036 | break; | |||
38037 | } while (V.hasOneUse()); | |||
38038 | break; | |||
38039 | } | |||
38040 | // Break out of the loop if we break out of the switch. | |||
38041 | break; | |||
38042 | } | |||
38043 | ||||
38044 | if (!V.hasOneUse()) | |||
38045 | // We fell out of the loop without finding a viable combining instruction. | |||
38046 | return SDValue(); | |||
38047 | ||||
38048 | // Merge this node's mask and our incoming mask. | |||
38049 | SmallVector<int, 4> VMask = getPSHUFShuffleMask(V); | |||
38050 | for (int &M : Mask) | |||
38051 | M = VMask[M]; | |||
38052 | V = DAG.getNode(V.getOpcode(), DL, V.getValueType(), V.getOperand(0), | |||
38053 | getV4X86ShuffleImm8ForMask(Mask, DL, DAG)); | |||
38054 | ||||
38055 | // Rebuild the chain around this new shuffle. | |||
38056 | while (!Chain.empty()) { | |||
38057 | SDValue W = Chain.pop_back_val(); | |||
38058 | ||||
38059 | if (V.getValueType() != W.getOperand(0).getValueType()) | |||
38060 | V = DAG.getBitcast(W.getOperand(0).getValueType(), V); | |||
38061 | ||||
38062 | switch (W.getOpcode()) { | |||
38063 | default: | |||
38064 | llvm_unreachable("Only PSHUF and UNPCK instructions get here!")::llvm::llvm_unreachable_internal("Only PSHUF and UNPCK instructions get here!" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 38064); | |||
38065 | ||||
38066 | case X86ISD::UNPCKL: | |||
38067 | case X86ISD::UNPCKH: | |||
38068 | V = DAG.getNode(W.getOpcode(), DL, W.getValueType(), V, V); | |||
38069 | break; | |||
38070 | ||||
38071 | case X86ISD::PSHUFD: | |||
38072 | case X86ISD::PSHUFLW: | |||
38073 | case X86ISD::PSHUFHW: | |||
38074 | V = DAG.getNode(W.getOpcode(), DL, W.getValueType(), V, W.getOperand(1)); | |||
38075 | break; | |||
38076 | } | |||
38077 | } | |||
38078 | if (V.getValueType() != N.getValueType()) | |||
38079 | V = DAG.getBitcast(N.getValueType(), V); | |||
38080 | ||||
38081 | // Return the new chain to replace N. | |||
38082 | return V; | |||
38083 | } | |||
38084 | ||||
38085 | // Attempt to commute shufps LHS loads: | |||
38086 | // permilps(shufps(load(),x)) --> permilps(shufps(x,load())) | |||
38087 | static SDValue combineCommutableSHUFP(SDValue N, MVT VT, const SDLoc &DL, | |||
38088 | SelectionDAG &DAG) { | |||
38089 | // TODO: Add vXf64 support. | |||
38090 | if (VT != MVT::v4f32 && VT != MVT::v8f32 && VT != MVT::v16f32) | |||
38091 | return SDValue(); | |||
38092 | ||||
38093 | // SHUFP(LHS, RHS) -> SHUFP(RHS, LHS) iff LHS is foldable + RHS is not. | |||
38094 | auto commuteSHUFP = [&VT, &DL, &DAG](SDValue Parent, SDValue V) { | |||
38095 | if (V.getOpcode() != X86ISD::SHUFP || !Parent->isOnlyUserOf(V.getNode())) | |||
38096 | return SDValue(); | |||
38097 | SDValue N0 = V.getOperand(0); | |||
38098 | SDValue N1 = V.getOperand(1); | |||
38099 | unsigned Imm = V.getConstantOperandVal(2); | |||
38100 | if (!MayFoldLoad(peekThroughOneUseBitcasts(N0)) || | |||
38101 | MayFoldLoad(peekThroughOneUseBitcasts(N1))) | |||
38102 | return SDValue(); | |||
38103 | Imm = ((Imm & 0x0F) << 4) | ((Imm & 0xF0) >> 4); | |||
38104 | return DAG.getNode(X86ISD::SHUFP, DL, VT, N1, N0, | |||
38105 | DAG.getTargetConstant(Imm, DL, MVT::i8)); | |||
38106 | }; | |||
38107 | ||||
38108 | switch (N.getOpcode()) { | |||
38109 | case X86ISD::VPERMILPI: | |||
38110 | if (SDValue NewSHUFP = commuteSHUFP(N, N.getOperand(0))) { | |||
38111 | unsigned Imm = N.getConstantOperandVal(1); | |||
38112 | return DAG.getNode(X86ISD::VPERMILPI, DL, VT, NewSHUFP, | |||
38113 | DAG.getTargetConstant(Imm ^ 0xAA, DL, MVT::i8)); | |||
38114 | } | |||
38115 | break; | |||
38116 | case X86ISD::SHUFP: { | |||
38117 | SDValue N0 = N.getOperand(0); | |||
38118 | SDValue N1 = N.getOperand(1); | |||
38119 | unsigned Imm = N.getConstantOperandVal(2); | |||
38120 | if (N0 == N1) { | |||
38121 | if (SDValue NewSHUFP = commuteSHUFP(N, N0)) | |||
38122 | return DAG.getNode(X86ISD::SHUFP, DL, VT, NewSHUFP, NewSHUFP, | |||
38123 | DAG.getTargetConstant(Imm ^ 0xAA, DL, MVT::i8)); | |||
38124 | } else if (SDValue NewSHUFP = commuteSHUFP(N, N0)) { | |||
38125 | return DAG.getNode(X86ISD::SHUFP, DL, VT, NewSHUFP, N1, | |||
38126 | DAG.getTargetConstant(Imm ^ 0x0A, DL, MVT::i8)); | |||
38127 | } else if (SDValue NewSHUFP = commuteSHUFP(N, N1)) { | |||
38128 | return DAG.getNode(X86ISD::SHUFP, DL, VT, N0, NewSHUFP, | |||
38129 | DAG.getTargetConstant(Imm ^ 0xA0, DL, MVT::i8)); | |||
38130 | } | |||
38131 | break; | |||
38132 | } | |||
38133 | } | |||
38134 | ||||
38135 | return SDValue(); | |||
38136 | } | |||
38137 | ||||
38138 | // Canonicalize SHUFFLE(BINOP(X,Y)) -> BINOP(SHUFFLE(X),SHUFFLE(Y)). | |||
38139 | static SDValue canonicalizeShuffleWithBinOps(SDValue N, SelectionDAG &DAG, | |||
38140 | const SDLoc &DL) { | |||
38141 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
38142 | EVT ShuffleVT = N.getValueType(); | |||
38143 | ||||
38144 | auto IsMergeableWithShuffle = [](SDValue Op) { | |||
38145 | // AllZeros/AllOnes constants are freely shuffled and will peek through | |||
38146 | // bitcasts. Other constant build vectors do not peek through bitcasts. Only | |||
38147 | // merge with target shuffles if it has one use so shuffle combining is | |||
38148 | // likely to kick in. | |||
38149 | return ISD::isBuildVectorAllOnes(Op.getNode()) || | |||
38150 | ISD::isBuildVectorAllZeros(Op.getNode()) || | |||
38151 | ISD::isBuildVectorOfConstantSDNodes(Op.getNode()) || | |||
38152 | ISD::isBuildVectorOfConstantFPSDNodes(Op.getNode()) || | |||
38153 | (isTargetShuffle(Op.getOpcode()) && Op->hasOneUse()); | |||
38154 | }; | |||
38155 | auto IsSafeToMoveShuffle = [ShuffleVT](SDValue Op, unsigned BinOp) { | |||
38156 | // Ensure we only shuffle whole vector src elements, unless its a logical | |||
38157 | // binops where we can more aggressively move shuffles from dst to src. | |||
38158 | return BinOp == ISD::AND || BinOp == ISD::OR || BinOp == ISD::XOR || | |||
38159 | (Op.getScalarValueSizeInBits() <= ShuffleVT.getScalarSizeInBits()); | |||
38160 | }; | |||
38161 | ||||
38162 | unsigned Opc = N.getOpcode(); | |||
38163 | switch (Opc) { | |||
38164 | // Unary and Unary+Permute Shuffles. | |||
38165 | case X86ISD::PSHUFB: { | |||
38166 | // Don't merge PSHUFB if it contains zero'd elements. | |||
38167 | SmallVector<int> Mask; | |||
38168 | SmallVector<SDValue> Ops; | |||
38169 | if (!getTargetShuffleMask(N.getNode(), ShuffleVT.getSimpleVT(), false, Ops, | |||
38170 | Mask)) | |||
38171 | break; | |||
38172 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
38173 | } | |||
38174 | case X86ISD::VBROADCAST: | |||
38175 | case X86ISD::MOVDDUP: | |||
38176 | case X86ISD::PSHUFD: | |||
38177 | case X86ISD::VPERMI: | |||
38178 | case X86ISD::VPERMILPI: { | |||
38179 | if (N.getOperand(0).getValueType() == ShuffleVT && | |||
38180 | N->isOnlyUserOf(N.getOperand(0).getNode())) { | |||
38181 | SDValue N0 = peekThroughOneUseBitcasts(N.getOperand(0)); | |||
38182 | unsigned SrcOpcode = N0.getOpcode(); | |||
38183 | if (TLI.isBinOp(SrcOpcode) && IsSafeToMoveShuffle(N0, SrcOpcode)) { | |||
38184 | SDValue Op00 = peekThroughOneUseBitcasts(N0.getOperand(0)); | |||
38185 | SDValue Op01 = peekThroughOneUseBitcasts(N0.getOperand(1)); | |||
38186 | if (IsMergeableWithShuffle(Op00) || IsMergeableWithShuffle(Op01)) { | |||
38187 | SDValue LHS, RHS; | |||
38188 | Op00 = DAG.getBitcast(ShuffleVT, Op00); | |||
38189 | Op01 = DAG.getBitcast(ShuffleVT, Op01); | |||
38190 | if (N.getNumOperands() == 2) { | |||
38191 | LHS = DAG.getNode(Opc, DL, ShuffleVT, Op00, N.getOperand(1)); | |||
38192 | RHS = DAG.getNode(Opc, DL, ShuffleVT, Op01, N.getOperand(1)); | |||
38193 | } else { | |||
38194 | LHS = DAG.getNode(Opc, DL, ShuffleVT, Op00); | |||
38195 | RHS = DAG.getNode(Opc, DL, ShuffleVT, Op01); | |||
38196 | } | |||
38197 | EVT OpVT = N0.getValueType(); | |||
38198 | return DAG.getBitcast(ShuffleVT, | |||
38199 | DAG.getNode(SrcOpcode, DL, OpVT, | |||
38200 | DAG.getBitcast(OpVT, LHS), | |||
38201 | DAG.getBitcast(OpVT, RHS))); | |||
38202 | } | |||
38203 | } | |||
38204 | } | |||
38205 | break; | |||
38206 | } | |||
38207 | // Binary and Binary+Permute Shuffles. | |||
38208 | case X86ISD::INSERTPS: { | |||
38209 | // Don't merge INSERTPS if it contains zero'd elements. | |||
38210 | unsigned InsertPSMask = N.getConstantOperandVal(2); | |||
38211 | unsigned ZeroMask = InsertPSMask & 0xF; | |||
38212 | if (ZeroMask != 0) | |||
38213 | break; | |||
38214 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
38215 | } | |||
38216 | case X86ISD::MOVSD: | |||
38217 | case X86ISD::MOVSS: | |||
38218 | case X86ISD::BLENDI: | |||
38219 | case X86ISD::SHUFP: | |||
38220 | case X86ISD::UNPCKH: | |||
38221 | case X86ISD::UNPCKL: { | |||
38222 | if (N->isOnlyUserOf(N.getOperand(0).getNode()) && | |||
38223 | N->isOnlyUserOf(N.getOperand(1).getNode())) { | |||
38224 | SDValue N0 = peekThroughOneUseBitcasts(N.getOperand(0)); | |||
38225 | SDValue N1 = peekThroughOneUseBitcasts(N.getOperand(1)); | |||
38226 | unsigned SrcOpcode = N0.getOpcode(); | |||
38227 | if (TLI.isBinOp(SrcOpcode) && N1.getOpcode() == SrcOpcode && | |||
38228 | IsSafeToMoveShuffle(N0, SrcOpcode) && | |||
38229 | IsSafeToMoveShuffle(N1, SrcOpcode)) { | |||
38230 | SDValue Op00 = peekThroughOneUseBitcasts(N0.getOperand(0)); | |||
38231 | SDValue Op10 = peekThroughOneUseBitcasts(N1.getOperand(0)); | |||
38232 | SDValue Op01 = peekThroughOneUseBitcasts(N0.getOperand(1)); | |||
38233 | SDValue Op11 = peekThroughOneUseBitcasts(N1.getOperand(1)); | |||
38234 | // Ensure the total number of shuffles doesn't increase by folding this | |||
38235 | // shuffle through to the source ops. | |||
38236 | if (((IsMergeableWithShuffle(Op00) && IsMergeableWithShuffle(Op10)) || | |||
38237 | (IsMergeableWithShuffle(Op01) && IsMergeableWithShuffle(Op11))) || | |||
38238 | ((IsMergeableWithShuffle(Op00) || IsMergeableWithShuffle(Op10)) && | |||
38239 | (IsMergeableWithShuffle(Op01) || IsMergeableWithShuffle(Op11)))) { | |||
38240 | SDValue LHS, RHS; | |||
38241 | Op00 = DAG.getBitcast(ShuffleVT, Op00); | |||
38242 | Op10 = DAG.getBitcast(ShuffleVT, Op10); | |||
38243 | Op01 = DAG.getBitcast(ShuffleVT, Op01); | |||
38244 | Op11 = DAG.getBitcast(ShuffleVT, Op11); | |||
38245 | if (N.getNumOperands() == 3) { | |||
38246 | LHS = DAG.getNode(Opc, DL, ShuffleVT, Op00, Op10, N.getOperand(2)); | |||
38247 | RHS = DAG.getNode(Opc, DL, ShuffleVT, Op01, Op11, N.getOperand(2)); | |||
38248 | } else { | |||
38249 | LHS = DAG.getNode(Opc, DL, ShuffleVT, Op00, Op10); | |||
38250 | RHS = DAG.getNode(Opc, DL, ShuffleVT, Op01, Op11); | |||
38251 | } | |||
38252 | EVT OpVT = N0.getValueType(); | |||
38253 | return DAG.getBitcast(ShuffleVT, | |||
38254 | DAG.getNode(SrcOpcode, DL, OpVT, | |||
38255 | DAG.getBitcast(OpVT, LHS), | |||
38256 | DAG.getBitcast(OpVT, RHS))); | |||
38257 | } | |||
38258 | } | |||
38259 | } | |||
38260 | break; | |||
38261 | } | |||
38262 | } | |||
38263 | return SDValue(); | |||
38264 | } | |||
38265 | ||||
38266 | /// Attempt to fold vpermf128(op(),op()) -> op(vpermf128(),vpermf128()). | |||
38267 | static SDValue canonicalizeLaneShuffleWithRepeatedOps(SDValue V, | |||
38268 | SelectionDAG &DAG, | |||
38269 | const SDLoc &DL) { | |||
38270 | assert(V.getOpcode() == X86ISD::VPERM2X128 && "Unknown lane shuffle")(static_cast <bool> (V.getOpcode() == X86ISD::VPERM2X128 && "Unknown lane shuffle") ? void (0) : __assert_fail ("V.getOpcode() == X86ISD::VPERM2X128 && \"Unknown lane shuffle\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 38270, __extension__ __PRETTY_FUNCTION__)); | |||
38271 | ||||
38272 | MVT VT = V.getSimpleValueType(); | |||
38273 | SDValue Src0 = peekThroughBitcasts(V.getOperand(0)); | |||
38274 | SDValue Src1 = peekThroughBitcasts(V.getOperand(1)); | |||
38275 | unsigned SrcOpc0 = Src0.getOpcode(); | |||
38276 | unsigned SrcOpc1 = Src1.getOpcode(); | |||
38277 | EVT SrcVT0 = Src0.getValueType(); | |||
38278 | EVT SrcVT1 = Src1.getValueType(); | |||
38279 | ||||
38280 | if (!Src1.isUndef() && (SrcVT0 != SrcVT1 || SrcOpc0 != SrcOpc1)) | |||
38281 | return SDValue(); | |||
38282 | ||||
38283 | switch (SrcOpc0) { | |||
38284 | case X86ISD::MOVDDUP: { | |||
38285 | SDValue LHS = Src0.getOperand(0); | |||
38286 | SDValue RHS = Src1.isUndef() ? Src1 : Src1.getOperand(0); | |||
38287 | SDValue Res = | |||
38288 | DAG.getNode(X86ISD::VPERM2X128, DL, SrcVT0, LHS, RHS, V.getOperand(2)); | |||
38289 | Res = DAG.getNode(SrcOpc0, DL, SrcVT0, Res); | |||
38290 | return DAG.getBitcast(VT, Res); | |||
38291 | } | |||
38292 | case X86ISD::VPERMILPI: | |||
38293 | // TODO: Handle v4f64 permutes with different low/high lane masks. | |||
38294 | if (SrcVT0 == MVT::v4f64) { | |||
38295 | uint64_t Mask = Src0.getConstantOperandVal(1); | |||
38296 | if ((Mask & 0x3) != ((Mask >> 2) & 0x3)) | |||
38297 | break; | |||
38298 | } | |||
38299 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
38300 | case X86ISD::VSHLI: | |||
38301 | case X86ISD::VSRLI: | |||
38302 | case X86ISD::VSRAI: | |||
38303 | case X86ISD::PSHUFD: | |||
38304 | if (Src1.isUndef() || Src0.getOperand(1) == Src1.getOperand(1)) { | |||
38305 | SDValue LHS = Src0.getOperand(0); | |||
38306 | SDValue RHS = Src1.isUndef() ? Src1 : Src1.getOperand(0); | |||
38307 | SDValue Res = DAG.getNode(X86ISD::VPERM2X128, DL, SrcVT0, LHS, RHS, | |||
38308 | V.getOperand(2)); | |||
38309 | Res = DAG.getNode(SrcOpc0, DL, SrcVT0, Res, Src0.getOperand(1)); | |||
38310 | return DAG.getBitcast(VT, Res); | |||
38311 | } | |||
38312 | break; | |||
38313 | } | |||
38314 | ||||
38315 | return SDValue(); | |||
38316 | } | |||
38317 | ||||
38318 | /// Try to combine x86 target specific shuffles. | |||
38319 | static SDValue combineTargetShuffle(SDValue N, SelectionDAG &DAG, | |||
38320 | TargetLowering::DAGCombinerInfo &DCI, | |||
38321 | const X86Subtarget &Subtarget) { | |||
38322 | SDLoc DL(N); | |||
38323 | MVT VT = N.getSimpleValueType(); | |||
38324 | SmallVector<int, 4> Mask; | |||
38325 | unsigned Opcode = N.getOpcode(); | |||
38326 | ||||
38327 | if (SDValue R = combineCommutableSHUFP(N, VT, DL, DAG)) | |||
38328 | return R; | |||
38329 | ||||
38330 | if (SDValue R = canonicalizeShuffleWithBinOps(N, DAG, DL)) | |||
38331 | return R; | |||
38332 | ||||
38333 | // Handle specific target shuffles. | |||
38334 | switch (Opcode) { | |||
38335 | case X86ISD::MOVDDUP: { | |||
38336 | SDValue Src = N.getOperand(0); | |||
38337 | // Turn a 128-bit MOVDDUP of a full vector load into movddup+vzload. | |||
38338 | if (VT == MVT::v2f64 && Src.hasOneUse() && | |||
38339 | ISD::isNormalLoad(Src.getNode())) { | |||
38340 | LoadSDNode *LN = cast<LoadSDNode>(Src); | |||
38341 | if (SDValue VZLoad = narrowLoadToVZLoad(LN, MVT::f64, MVT::v2f64, DAG)) { | |||
38342 | SDValue Movddup = DAG.getNode(X86ISD::MOVDDUP, DL, MVT::v2f64, VZLoad); | |||
38343 | DCI.CombineTo(N.getNode(), Movddup); | |||
38344 | DAG.ReplaceAllUsesOfValueWith(SDValue(LN, 1), VZLoad.getValue(1)); | |||
38345 | DCI.recursivelyDeleteUnusedNodes(LN); | |||
38346 | return N; // Return N so it doesn't get rechecked! | |||
38347 | } | |||
38348 | } | |||
38349 | ||||
38350 | return SDValue(); | |||
38351 | } | |||
38352 | case X86ISD::VBROADCAST: { | |||
38353 | SDValue Src = N.getOperand(0); | |||
38354 | SDValue BC = peekThroughBitcasts(Src); | |||
38355 | EVT SrcVT = Src.getValueType(); | |||
38356 | EVT BCVT = BC.getValueType(); | |||
38357 | ||||
38358 | // If broadcasting from another shuffle, attempt to simplify it. | |||
38359 | // TODO - we really need a general SimplifyDemandedVectorElts mechanism. | |||
38360 | if (isTargetShuffle(BC.getOpcode()) && | |||
38361 | VT.getScalarSizeInBits() % BCVT.getScalarSizeInBits() == 0) { | |||
38362 | unsigned Scale = VT.getScalarSizeInBits() / BCVT.getScalarSizeInBits(); | |||
38363 | SmallVector<int, 16> DemandedMask(BCVT.getVectorNumElements(), | |||
38364 | SM_SentinelUndef); | |||
38365 | for (unsigned i = 0; i != Scale; ++i) | |||
38366 | DemandedMask[i] = i; | |||
38367 | if (SDValue Res = combineX86ShufflesRecursively( | |||
38368 | {BC}, 0, BC, DemandedMask, {}, /*Depth*/ 0, | |||
38369 | X86::MaxShuffleCombineDepth, | |||
38370 | /*HasVarMask*/ false, /*AllowCrossLaneVarMask*/ true, | |||
38371 | /*AllowPerLaneVarMask*/ true, DAG, Subtarget)) | |||
38372 | return DAG.getNode(X86ISD::VBROADCAST, DL, VT, | |||
38373 | DAG.getBitcast(SrcVT, Res)); | |||
38374 | } | |||
38375 | ||||
38376 | // broadcast(bitcast(src)) -> bitcast(broadcast(src)) | |||
38377 | // 32-bit targets have to bitcast i64 to f64, so better to bitcast upward. | |||
38378 | if (Src.getOpcode() == ISD::BITCAST && | |||
38379 | SrcVT.getScalarSizeInBits() == BCVT.getScalarSizeInBits() && | |||
38380 | DAG.getTargetLoweringInfo().isTypeLegal(BCVT) && | |||
38381 | FixedVectorType::isValidElementType( | |||
38382 | BCVT.getScalarType().getTypeForEVT(*DAG.getContext()))) { | |||
38383 | EVT NewVT = EVT::getVectorVT(*DAG.getContext(), BCVT.getScalarType(), | |||
38384 | VT.getVectorNumElements()); | |||
38385 | return DAG.getBitcast(VT, DAG.getNode(X86ISD::VBROADCAST, DL, NewVT, BC)); | |||
38386 | } | |||
38387 | ||||
38388 | // Reduce broadcast source vector to lowest 128-bits. | |||
38389 | if (SrcVT.getSizeInBits() > 128) | |||
38390 | return DAG.getNode(X86ISD::VBROADCAST, DL, VT, | |||
38391 | extract128BitVector(Src, 0, DAG, DL)); | |||
38392 | ||||
38393 | // broadcast(scalar_to_vector(x)) -> broadcast(x). | |||
38394 | if (Src.getOpcode() == ISD::SCALAR_TO_VECTOR) | |||
38395 | return DAG.getNode(X86ISD::VBROADCAST, DL, VT, Src.getOperand(0)); | |||
38396 | ||||
38397 | // broadcast(extract_vector_elt(x, 0)) -> broadcast(x). | |||
38398 | if (Src.getOpcode() == ISD::EXTRACT_VECTOR_ELT && | |||
38399 | isNullConstant(Src.getOperand(1)) && | |||
38400 | DAG.getTargetLoweringInfo().isTypeLegal( | |||
38401 | Src.getOperand(0).getValueType())) | |||
38402 | return DAG.getNode(X86ISD::VBROADCAST, DL, VT, Src.getOperand(0)); | |||
38403 | ||||
38404 | // Share broadcast with the longest vector and extract low subvector (free). | |||
38405 | // Ensure the same SDValue from the SDNode use is being used. | |||
38406 | for (SDNode *User : Src->uses()) | |||
38407 | if (User != N.getNode() && User->getOpcode() == X86ISD::VBROADCAST && | |||
38408 | Src == User->getOperand(0) && | |||
38409 | User->getValueSizeInBits(0).getFixedSize() > | |||
38410 | VT.getFixedSizeInBits()) { | |||
38411 | return extractSubVector(SDValue(User, 0), 0, DAG, DL, | |||
38412 | VT.getSizeInBits()); | |||
38413 | } | |||
38414 | ||||
38415 | // vbroadcast(scalarload X) -> vbroadcast_load X | |||
38416 | // For float loads, extract other uses of the scalar from the broadcast. | |||
38417 | if (!SrcVT.isVector() && (Src.hasOneUse() || VT.isFloatingPoint()) && | |||
38418 | ISD::isNormalLoad(Src.getNode())) { | |||
38419 | LoadSDNode *LN = cast<LoadSDNode>(Src); | |||
38420 | SDVTList Tys = DAG.getVTList(VT, MVT::Other); | |||
38421 | SDValue Ops[] = { LN->getChain(), LN->getBasePtr() }; | |||
38422 | SDValue BcastLd = | |||
38423 | DAG.getMemIntrinsicNode(X86ISD::VBROADCAST_LOAD, DL, Tys, Ops, | |||
38424 | LN->getMemoryVT(), LN->getMemOperand()); | |||
38425 | // If the load value is used only by N, replace it via CombineTo N. | |||
38426 | bool NoReplaceExtract = Src.hasOneUse(); | |||
38427 | DCI.CombineTo(N.getNode(), BcastLd); | |||
38428 | if (NoReplaceExtract) { | |||
38429 | DAG.ReplaceAllUsesOfValueWith(SDValue(LN, 1), BcastLd.getValue(1)); | |||
38430 | DCI.recursivelyDeleteUnusedNodes(LN); | |||
38431 | } else { | |||
38432 | SDValue Scl = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, SrcVT, BcastLd, | |||
38433 | DAG.getIntPtrConstant(0, DL)); | |||
38434 | DCI.CombineTo(LN, Scl, BcastLd.getValue(1)); | |||
38435 | } | |||
38436 | return N; // Return N so it doesn't get rechecked! | |||
38437 | } | |||
38438 | ||||
38439 | // Due to isTypeDesirableForOp, we won't always shrink a load truncated to | |||
38440 | // i16. So shrink it ourselves if we can make a broadcast_load. | |||
38441 | if (SrcVT == MVT::i16 && Src.getOpcode() == ISD::TRUNCATE && | |||
38442 | Src.hasOneUse() && Src.getOperand(0).hasOneUse()) { | |||
38443 | assert(Subtarget.hasAVX2() && "Expected AVX2")(static_cast <bool> (Subtarget.hasAVX2() && "Expected AVX2" ) ? void (0) : __assert_fail ("Subtarget.hasAVX2() && \"Expected AVX2\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 38443, __extension__ __PRETTY_FUNCTION__)); | |||
38444 | SDValue TruncIn = Src.getOperand(0); | |||
38445 | ||||
38446 | // If this is a truncate of a non extending load we can just narrow it to | |||
38447 | // use a broadcast_load. | |||
38448 | if (ISD::isNormalLoad(TruncIn.getNode())) { | |||
38449 | LoadSDNode *LN = cast<LoadSDNode>(TruncIn); | |||
38450 | // Unless its volatile or atomic. | |||
38451 | if (LN->isSimple()) { | |||
38452 | SDVTList Tys = DAG.getVTList(VT, MVT::Other); | |||
38453 | SDValue Ops[] = { LN->getChain(), LN->getBasePtr() }; | |||
38454 | SDValue BcastLd = DAG.getMemIntrinsicNode( | |||
38455 | X86ISD::VBROADCAST_LOAD, DL, Tys, Ops, MVT::i16, | |||
38456 | LN->getPointerInfo(), LN->getOriginalAlign(), | |||
38457 | LN->getMemOperand()->getFlags()); | |||
38458 | DCI.CombineTo(N.getNode(), BcastLd); | |||
38459 | DAG.ReplaceAllUsesOfValueWith(SDValue(LN, 1), BcastLd.getValue(1)); | |||
38460 | DCI.recursivelyDeleteUnusedNodes(Src.getNode()); | |||
38461 | return N; // Return N so it doesn't get rechecked! | |||
38462 | } | |||
38463 | } | |||
38464 | ||||
38465 | // If this is a truncate of an i16 extload, we can directly replace it. | |||
38466 | if (ISD::isUNINDEXEDLoad(Src.getOperand(0).getNode()) && | |||
38467 | ISD::isEXTLoad(Src.getOperand(0).getNode())) { | |||
38468 | LoadSDNode *LN = cast<LoadSDNode>(Src.getOperand(0)); | |||
38469 | if (LN->getMemoryVT().getSizeInBits() == 16) { | |||
38470 | SDVTList Tys = DAG.getVTList(VT, MVT::Other); | |||
38471 | SDValue Ops[] = { LN->getChain(), LN->getBasePtr() }; | |||
38472 | SDValue BcastLd = | |||
38473 | DAG.getMemIntrinsicNode(X86ISD::VBROADCAST_LOAD, DL, Tys, Ops, | |||
38474 | LN->getMemoryVT(), LN->getMemOperand()); | |||
38475 | DCI.CombineTo(N.getNode(), BcastLd); | |||
38476 | DAG.ReplaceAllUsesOfValueWith(SDValue(LN, 1), BcastLd.getValue(1)); | |||
38477 | DCI.recursivelyDeleteUnusedNodes(Src.getNode()); | |||
38478 | return N; // Return N so it doesn't get rechecked! | |||
38479 | } | |||
38480 | } | |||
38481 | ||||
38482 | // If this is a truncate of load that has been shifted right, we can | |||
38483 | // offset the pointer and use a narrower load. | |||
38484 | if (TruncIn.getOpcode() == ISD::SRL && | |||
38485 | TruncIn.getOperand(0).hasOneUse() && | |||
38486 | isa<ConstantSDNode>(TruncIn.getOperand(1)) && | |||
38487 | ISD::isNormalLoad(TruncIn.getOperand(0).getNode())) { | |||
38488 | LoadSDNode *LN = cast<LoadSDNode>(TruncIn.getOperand(0)); | |||
38489 | unsigned ShiftAmt = TruncIn.getConstantOperandVal(1); | |||
38490 | // Make sure the shift amount and the load size are divisible by 16. | |||
38491 | // Don't do this if the load is volatile or atomic. | |||
38492 | if (ShiftAmt % 16 == 0 && TruncIn.getValueSizeInBits() % 16 == 0 && | |||
38493 | LN->isSimple()) { | |||
38494 | unsigned Offset = ShiftAmt / 8; | |||
38495 | SDVTList Tys = DAG.getVTList(VT, MVT::Other); | |||
38496 | SDValue Ptr = DAG.getMemBasePlusOffset(LN->getBasePtr(), | |||
38497 | TypeSize::Fixed(Offset), DL); | |||
38498 | SDValue Ops[] = { LN->getChain(), Ptr }; | |||
38499 | SDValue BcastLd = DAG.getMemIntrinsicNode( | |||
38500 | X86ISD::VBROADCAST_LOAD, DL, Tys, Ops, MVT::i16, | |||
38501 | LN->getPointerInfo().getWithOffset(Offset), | |||
38502 | LN->getOriginalAlign(), | |||
38503 | LN->getMemOperand()->getFlags()); | |||
38504 | DCI.CombineTo(N.getNode(), BcastLd); | |||
38505 | DAG.ReplaceAllUsesOfValueWith(SDValue(LN, 1), BcastLd.getValue(1)); | |||
38506 | DCI.recursivelyDeleteUnusedNodes(Src.getNode()); | |||
38507 | return N; // Return N so it doesn't get rechecked! | |||
38508 | } | |||
38509 | } | |||
38510 | } | |||
38511 | ||||
38512 | // vbroadcast(vzload X) -> vbroadcast_load X | |||
38513 | if (Src.getOpcode() == X86ISD::VZEXT_LOAD && Src.hasOneUse()) { | |||
38514 | MemSDNode *LN = cast<MemIntrinsicSDNode>(Src); | |||
38515 | if (LN->getMemoryVT().getSizeInBits() == VT.getScalarSizeInBits()) { | |||
38516 | SDVTList Tys = DAG.getVTList(VT, MVT::Other); | |||
38517 | SDValue Ops[] = { LN->getChain(), LN->getBasePtr() }; | |||
38518 | SDValue BcastLd = | |||
38519 | DAG.getMemIntrinsicNode(X86ISD::VBROADCAST_LOAD, DL, Tys, Ops, | |||
38520 | LN->getMemoryVT(), LN->getMemOperand()); | |||
38521 | DCI.CombineTo(N.getNode(), BcastLd); | |||
38522 | DAG.ReplaceAllUsesOfValueWith(SDValue(LN, 1), BcastLd.getValue(1)); | |||
38523 | DCI.recursivelyDeleteUnusedNodes(LN); | |||
38524 | return N; // Return N so it doesn't get rechecked! | |||
38525 | } | |||
38526 | } | |||
38527 | ||||
38528 | // vbroadcast(vector load X) -> vbroadcast_load | |||
38529 | if ((SrcVT == MVT::v2f64 || SrcVT == MVT::v4f32 || SrcVT == MVT::v2i64 || | |||
38530 | SrcVT == MVT::v4i32) && | |||
38531 | Src.hasOneUse() && ISD::isNormalLoad(Src.getNode())) { | |||
38532 | LoadSDNode *LN = cast<LoadSDNode>(Src); | |||
38533 | // Unless the load is volatile or atomic. | |||
38534 | if (LN->isSimple()) { | |||
38535 | SDVTList Tys = DAG.getVTList(VT, MVT::Other); | |||
38536 | SDValue Ops[] = {LN->getChain(), LN->getBasePtr()}; | |||
38537 | SDValue BcastLd = DAG.getMemIntrinsicNode( | |||
38538 | X86ISD::VBROADCAST_LOAD, DL, Tys, Ops, SrcVT.getScalarType(), | |||
38539 | LN->getPointerInfo(), LN->getOriginalAlign(), | |||
38540 | LN->getMemOperand()->getFlags()); | |||
38541 | DCI.CombineTo(N.getNode(), BcastLd); | |||
38542 | DAG.ReplaceAllUsesOfValueWith(SDValue(LN, 1), BcastLd.getValue(1)); | |||
38543 | DCI.recursivelyDeleteUnusedNodes(LN); | |||
38544 | return N; // Return N so it doesn't get rechecked! | |||
38545 | } | |||
38546 | } | |||
38547 | ||||
38548 | return SDValue(); | |||
38549 | } | |||
38550 | case X86ISD::VZEXT_MOVL: { | |||
38551 | SDValue N0 = N.getOperand(0); | |||
38552 | ||||
38553 | // If this a vzmovl of a full vector load, replace it with a vzload, unless | |||
38554 | // the load is volatile. | |||
38555 | if (N0.hasOneUse() && ISD::isNormalLoad(N0.getNode())) { | |||
38556 | auto *LN = cast<LoadSDNode>(N0); | |||
38557 | if (SDValue VZLoad = | |||
38558 | narrowLoadToVZLoad(LN, VT.getVectorElementType(), VT, DAG)) { | |||
38559 | DCI.CombineTo(N.getNode(), VZLoad); | |||
38560 | DAG.ReplaceAllUsesOfValueWith(SDValue(LN, 1), VZLoad.getValue(1)); | |||
38561 | DCI.recursivelyDeleteUnusedNodes(LN); | |||
38562 | return N; | |||
38563 | } | |||
38564 | } | |||
38565 | ||||
38566 | // If this a VZEXT_MOVL of a VBROADCAST_LOAD, we don't need the broadcast | |||
38567 | // and can just use a VZEXT_LOAD. | |||
38568 | // FIXME: Is there some way to do this with SimplifyDemandedVectorElts? | |||
38569 | if (N0.hasOneUse() && N0.getOpcode() == X86ISD::VBROADCAST_LOAD) { | |||
38570 | auto *LN = cast<MemSDNode>(N0); | |||
38571 | if (VT.getScalarSizeInBits() == LN->getMemoryVT().getSizeInBits()) { | |||
38572 | SDVTList Tys = DAG.getVTList(VT, MVT::Other); | |||
38573 | SDValue Ops[] = {LN->getChain(), LN->getBasePtr()}; | |||
38574 | SDValue VZLoad = | |||
38575 | DAG.getMemIntrinsicNode(X86ISD::VZEXT_LOAD, DL, Tys, Ops, | |||
38576 | LN->getMemoryVT(), LN->getMemOperand()); | |||
38577 | DCI.CombineTo(N.getNode(), VZLoad); | |||
38578 | DAG.ReplaceAllUsesOfValueWith(SDValue(LN, 1), VZLoad.getValue(1)); | |||
38579 | DCI.recursivelyDeleteUnusedNodes(LN); | |||
38580 | return N; | |||
38581 | } | |||
38582 | } | |||
38583 | ||||
38584 | // Turn (v2i64 (vzext_movl (scalar_to_vector (i64 X)))) into | |||
38585 | // (v2i64 (bitcast (v4i32 (vzext_movl (scalar_to_vector (i32 (trunc X))))))) | |||
38586 | // if the upper bits of the i64 are zero. | |||
38587 | if (N0.hasOneUse() && N0.getOpcode() == ISD::SCALAR_TO_VECTOR && | |||
38588 | N0.getOperand(0).hasOneUse() && | |||
38589 | N0.getOperand(0).getValueType() == MVT::i64) { | |||
38590 | SDValue In = N0.getOperand(0); | |||
38591 | APInt Mask = APInt::getHighBitsSet(64, 32); | |||
38592 | if (DAG.MaskedValueIsZero(In, Mask)) { | |||
38593 | SDValue Trunc = DAG.getNode(ISD::TRUNCATE, DL, MVT::i32, In); | |||
38594 | MVT VecVT = MVT::getVectorVT(MVT::i32, VT.getVectorNumElements() * 2); | |||
38595 | SDValue SclVec = DAG.getNode(ISD::SCALAR_TO_VECTOR, DL, VecVT, Trunc); | |||
38596 | SDValue Movl = DAG.getNode(X86ISD::VZEXT_MOVL, DL, VecVT, SclVec); | |||
38597 | return DAG.getBitcast(VT, Movl); | |||
38598 | } | |||
38599 | } | |||
38600 | ||||
38601 | // Load a scalar integer constant directly to XMM instead of transferring an | |||
38602 | // immediate value from GPR. | |||
38603 | // vzext_movl (scalar_to_vector C) --> load [C,0...] | |||
38604 | if (N0.getOpcode() == ISD::SCALAR_TO_VECTOR) { | |||
38605 | if (auto *C = dyn_cast<ConstantSDNode>(N0.getOperand(0))) { | |||
38606 | // Create a vector constant - scalar constant followed by zeros. | |||
38607 | EVT ScalarVT = N0.getOperand(0).getValueType(); | |||
38608 | Type *ScalarTy = ScalarVT.getTypeForEVT(*DAG.getContext()); | |||
38609 | unsigned NumElts = VT.getVectorNumElements(); | |||
38610 | Constant *Zero = ConstantInt::getNullValue(ScalarTy); | |||
38611 | SmallVector<Constant *, 32> ConstantVec(NumElts, Zero); | |||
38612 | ConstantVec[0] = const_cast<ConstantInt *>(C->getConstantIntValue()); | |||
38613 | ||||
38614 | // Load the vector constant from constant pool. | |||
38615 | MVT PVT = DAG.getTargetLoweringInfo().getPointerTy(DAG.getDataLayout()); | |||
38616 | SDValue CP = DAG.getConstantPool(ConstantVector::get(ConstantVec), PVT); | |||
38617 | MachinePointerInfo MPI = | |||
38618 | MachinePointerInfo::getConstantPool(DAG.getMachineFunction()); | |||
38619 | Align Alignment = cast<ConstantPoolSDNode>(CP)->getAlign(); | |||
38620 | return DAG.getLoad(VT, DL, DAG.getEntryNode(), CP, MPI, Alignment, | |||
38621 | MachineMemOperand::MOLoad); | |||
38622 | } | |||
38623 | } | |||
38624 | ||||
38625 | // Pull subvector inserts into undef through VZEXT_MOVL by making it an | |||
38626 | // insert into a zero vector. This helps get VZEXT_MOVL closer to | |||
38627 | // scalar_to_vectors where 256/512 are canonicalized to an insert and a | |||
38628 | // 128-bit scalar_to_vector. This reduces the number of isel patterns. | |||
38629 | if (!DCI.isBeforeLegalizeOps() && N0.hasOneUse()) { | |||
38630 | SDValue V = peekThroughOneUseBitcasts(N0); | |||
38631 | ||||
38632 | if (V.getOpcode() == ISD::INSERT_SUBVECTOR && V.getOperand(0).isUndef() && | |||
38633 | isNullConstant(V.getOperand(2))) { | |||
38634 | SDValue In = V.getOperand(1); | |||
38635 | MVT SubVT = MVT::getVectorVT(VT.getVectorElementType(), | |||
38636 | In.getValueSizeInBits() / | |||
38637 | VT.getScalarSizeInBits()); | |||
38638 | In = DAG.getBitcast(SubVT, In); | |||
38639 | SDValue Movl = DAG.getNode(X86ISD::VZEXT_MOVL, DL, SubVT, In); | |||
38640 | return DAG.getNode(ISD::INSERT_SUBVECTOR, DL, VT, | |||
38641 | getZeroVector(VT, Subtarget, DAG, DL), Movl, | |||
38642 | V.getOperand(2)); | |||
38643 | } | |||
38644 | } | |||
38645 | ||||
38646 | return SDValue(); | |||
38647 | } | |||
38648 | case X86ISD::BLENDI: { | |||
38649 | SDValue N0 = N.getOperand(0); | |||
38650 | SDValue N1 = N.getOperand(1); | |||
38651 | ||||
38652 | // blend(bitcast(x),bitcast(y)) -> bitcast(blend(x,y)) to narrower types. | |||
38653 | // TODO: Handle MVT::v16i16 repeated blend mask. | |||
38654 | if (N0.getOpcode() == ISD::BITCAST && N1.getOpcode() == ISD::BITCAST && | |||
38655 | N0.getOperand(0).getValueType() == N1.getOperand(0).getValueType()) { | |||
38656 | MVT SrcVT = N0.getOperand(0).getSimpleValueType(); | |||
38657 | if ((VT.getScalarSizeInBits() % SrcVT.getScalarSizeInBits()) == 0 && | |||
38658 | SrcVT.getScalarSizeInBits() >= 32) { | |||
38659 | unsigned BlendMask = N.getConstantOperandVal(2); | |||
38660 | unsigned Size = VT.getVectorNumElements(); | |||
38661 | unsigned Scale = VT.getScalarSizeInBits() / SrcVT.getScalarSizeInBits(); | |||
38662 | BlendMask = scaleVectorShuffleBlendMask(BlendMask, Size, Scale); | |||
38663 | return DAG.getBitcast( | |||
38664 | VT, DAG.getNode(X86ISD::BLENDI, DL, SrcVT, N0.getOperand(0), | |||
38665 | N1.getOperand(0), | |||
38666 | DAG.getTargetConstant(BlendMask, DL, MVT::i8))); | |||
38667 | } | |||
38668 | } | |||
38669 | return SDValue(); | |||
38670 | } | |||
38671 | case X86ISD::VPERMI: { | |||
38672 | // vpermi(bitcast(x)) -> bitcast(vpermi(x)) for same number of elements. | |||
38673 | // TODO: Remove when we have preferred domains in combineX86ShuffleChain. | |||
38674 | SDValue N0 = N.getOperand(0); | |||
38675 | SDValue N1 = N.getOperand(1); | |||
38676 | unsigned EltSizeInBits = VT.getScalarSizeInBits(); | |||
38677 | if (N0.getOpcode() == ISD::BITCAST && | |||
38678 | N0.getOperand(0).getScalarValueSizeInBits() == EltSizeInBits) { | |||
38679 | SDValue Src = N0.getOperand(0); | |||
38680 | EVT SrcVT = Src.getValueType(); | |||
38681 | SDValue Res = DAG.getNode(X86ISD::VPERMI, DL, SrcVT, Src, N1); | |||
38682 | return DAG.getBitcast(VT, Res); | |||
38683 | } | |||
38684 | return SDValue(); | |||
38685 | } | |||
38686 | case X86ISD::VPERM2X128: { | |||
38687 | // Fold vperm2x128(bitcast(x),bitcast(y),c) -> bitcast(vperm2x128(x,y,c)). | |||
38688 | SDValue LHS = N->getOperand(0); | |||
38689 | SDValue RHS = N->getOperand(1); | |||
38690 | if (LHS.getOpcode() == ISD::BITCAST && | |||
38691 | (RHS.getOpcode() == ISD::BITCAST || RHS.isUndef())) { | |||
38692 | EVT SrcVT = LHS.getOperand(0).getValueType(); | |||
38693 | if (RHS.isUndef() || SrcVT == RHS.getOperand(0).getValueType()) { | |||
38694 | return DAG.getBitcast(VT, DAG.getNode(X86ISD::VPERM2X128, DL, SrcVT, | |||
38695 | DAG.getBitcast(SrcVT, LHS), | |||
38696 | DAG.getBitcast(SrcVT, RHS), | |||
38697 | N->getOperand(2))); | |||
38698 | } | |||
38699 | } | |||
38700 | ||||
38701 | // Fold vperm2x128(op(),op()) -> op(vperm2x128(),vperm2x128()). | |||
38702 | if (SDValue Res = canonicalizeLaneShuffleWithRepeatedOps(N, DAG, DL)) | |||
38703 | return Res; | |||
38704 | ||||
38705 | // Fold vperm2x128 subvector shuffle with an inner concat pattern. | |||
38706 | // vperm2x128(concat(X,Y),concat(Z,W)) --> concat X,Y etc. | |||
38707 | auto FindSubVector128 = [&](unsigned Idx) { | |||
38708 | if (Idx > 3) | |||
38709 | return SDValue(); | |||
38710 | SDValue Src = peekThroughBitcasts(N.getOperand(Idx < 2 ? 0 : 1)); | |||
38711 | SmallVector<SDValue> SubOps; | |||
38712 | if (collectConcatOps(Src.getNode(), SubOps) && SubOps.size() == 2) | |||
38713 | return SubOps[Idx & 1]; | |||
38714 | unsigned NumElts = Src.getValueType().getVectorNumElements(); | |||
38715 | if ((Idx & 1) == 1 && Src.getOpcode() == ISD::INSERT_SUBVECTOR && | |||
38716 | Src.getOperand(1).getValueSizeInBits() == 128 && | |||
38717 | Src.getConstantOperandAPInt(2) == (NumElts / 2)) { | |||
38718 | return Src.getOperand(1); | |||
38719 | } | |||
38720 | return SDValue(); | |||
38721 | }; | |||
38722 | unsigned Imm = N.getConstantOperandVal(2); | |||
38723 | if (SDValue SubLo = FindSubVector128(Imm & 0x0F)) { | |||
38724 | if (SDValue SubHi = FindSubVector128((Imm & 0xF0) >> 4)) { | |||
38725 | MVT SubVT = VT.getHalfNumVectorElementsVT(); | |||
38726 | SubLo = DAG.getBitcast(SubVT, SubLo); | |||
38727 | SubHi = DAG.getBitcast(SubVT, SubHi); | |||
38728 | return DAG.getNode(ISD::CONCAT_VECTORS, DL, VT, SubLo, SubHi); | |||
38729 | } | |||
38730 | } | |||
38731 | return SDValue(); | |||
38732 | } | |||
38733 | case X86ISD::PSHUFD: | |||
38734 | case X86ISD::PSHUFLW: | |||
38735 | case X86ISD::PSHUFHW: | |||
38736 | Mask = getPSHUFShuffleMask(N); | |||
38737 | assert(Mask.size() == 4)(static_cast <bool> (Mask.size() == 4) ? void (0) : __assert_fail ("Mask.size() == 4", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 38737, __extension__ __PRETTY_FUNCTION__)); | |||
38738 | break; | |||
38739 | case X86ISD::MOVSD: | |||
38740 | case X86ISD::MOVSH: | |||
38741 | case X86ISD::MOVSS: { | |||
38742 | SDValue N0 = N.getOperand(0); | |||
38743 | SDValue N1 = N.getOperand(1); | |||
38744 | ||||
38745 | // Canonicalize scalar FPOps: | |||
38746 | // MOVS*(N0, OP(N0, N1)) --> MOVS*(N0, SCALAR_TO_VECTOR(OP(N0[0], N1[0]))) | |||
38747 | // If commutable, allow OP(N1[0], N0[0]). | |||
38748 | unsigned Opcode1 = N1.getOpcode(); | |||
38749 | if (Opcode1 == ISD::FADD || Opcode1 == ISD::FMUL || Opcode1 == ISD::FSUB || | |||
38750 | Opcode1 == ISD::FDIV) { | |||
38751 | SDValue N10 = N1.getOperand(0); | |||
38752 | SDValue N11 = N1.getOperand(1); | |||
38753 | if (N10 == N0 || | |||
38754 | (N11 == N0 && (Opcode1 == ISD::FADD || Opcode1 == ISD::FMUL))) { | |||
38755 | if (N10 != N0) | |||
38756 | std::swap(N10, N11); | |||
38757 | MVT SVT = VT.getVectorElementType(); | |||
38758 | SDValue ZeroIdx = DAG.getIntPtrConstant(0, DL); | |||
38759 | N10 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, SVT, N10, ZeroIdx); | |||
38760 | N11 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, SVT, N11, ZeroIdx); | |||
38761 | SDValue Scl = DAG.getNode(Opcode1, DL, SVT, N10, N11); | |||
38762 | SDValue SclVec = DAG.getNode(ISD::SCALAR_TO_VECTOR, DL, VT, Scl); | |||
38763 | return DAG.getNode(Opcode, DL, VT, N0, SclVec); | |||
38764 | } | |||
38765 | } | |||
38766 | ||||
38767 | return SDValue(); | |||
38768 | } | |||
38769 | case X86ISD::INSERTPS: { | |||
38770 | assert(VT == MVT::v4f32 && "INSERTPS ValueType must be MVT::v4f32")(static_cast <bool> (VT == MVT::v4f32 && "INSERTPS ValueType must be MVT::v4f32" ) ? void (0) : __assert_fail ("VT == MVT::v4f32 && \"INSERTPS ValueType must be MVT::v4f32\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 38770, __extension__ __PRETTY_FUNCTION__)); | |||
38771 | SDValue Op0 = N.getOperand(0); | |||
38772 | SDValue Op1 = N.getOperand(1); | |||
38773 | unsigned InsertPSMask = N.getConstantOperandVal(2); | |||
38774 | unsigned SrcIdx = (InsertPSMask >> 6) & 0x3; | |||
38775 | unsigned DstIdx = (InsertPSMask >> 4) & 0x3; | |||
38776 | unsigned ZeroMask = InsertPSMask & 0xF; | |||
38777 | ||||
38778 | // If we zero out all elements from Op0 then we don't need to reference it. | |||
38779 | if (((ZeroMask | (1u << DstIdx)) == 0xF) && !Op0.isUndef()) | |||
38780 | return DAG.getNode(X86ISD::INSERTPS, DL, VT, DAG.getUNDEF(VT), Op1, | |||
38781 | DAG.getTargetConstant(InsertPSMask, DL, MVT::i8)); | |||
38782 | ||||
38783 | // If we zero out the element from Op1 then we don't need to reference it. | |||
38784 | if ((ZeroMask & (1u << DstIdx)) && !Op1.isUndef()) | |||
38785 | return DAG.getNode(X86ISD::INSERTPS, DL, VT, Op0, DAG.getUNDEF(VT), | |||
38786 | DAG.getTargetConstant(InsertPSMask, DL, MVT::i8)); | |||
38787 | ||||
38788 | // Attempt to merge insertps Op1 with an inner target shuffle node. | |||
38789 | SmallVector<int, 8> TargetMask1; | |||
38790 | SmallVector<SDValue, 2> Ops1; | |||
38791 | APInt KnownUndef1, KnownZero1; | |||
38792 | if (getTargetShuffleAndZeroables(Op1, TargetMask1, Ops1, KnownUndef1, | |||
38793 | KnownZero1)) { | |||
38794 | if (KnownUndef1[SrcIdx] || KnownZero1[SrcIdx]) { | |||
38795 | // Zero/UNDEF insertion - zero out element and remove dependency. | |||
38796 | InsertPSMask |= (1u << DstIdx); | |||
38797 | return DAG.getNode(X86ISD::INSERTPS, DL, VT, Op0, DAG.getUNDEF(VT), | |||
38798 | DAG.getTargetConstant(InsertPSMask, DL, MVT::i8)); | |||
38799 | } | |||
38800 | // Update insertps mask srcidx and reference the source input directly. | |||
38801 | int M = TargetMask1[SrcIdx]; | |||
38802 | assert(0 <= M && M < 8 && "Shuffle index out of range")(static_cast <bool> (0 <= M && M < 8 && "Shuffle index out of range") ? void (0) : __assert_fail ("0 <= M && M < 8 && \"Shuffle index out of range\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 38802, __extension__ __PRETTY_FUNCTION__)); | |||
38803 | InsertPSMask = (InsertPSMask & 0x3f) | ((M & 0x3) << 6); | |||
38804 | Op1 = Ops1[M < 4 ? 0 : 1]; | |||
38805 | return DAG.getNode(X86ISD::INSERTPS, DL, VT, Op0, Op1, | |||
38806 | DAG.getTargetConstant(InsertPSMask, DL, MVT::i8)); | |||
38807 | } | |||
38808 | ||||
38809 | // Attempt to merge insertps Op0 with an inner target shuffle node. | |||
38810 | SmallVector<int, 8> TargetMask0; | |||
38811 | SmallVector<SDValue, 2> Ops0; | |||
38812 | APInt KnownUndef0, KnownZero0; | |||
38813 | if (getTargetShuffleAndZeroables(Op0, TargetMask0, Ops0, KnownUndef0, | |||
38814 | KnownZero0)) { | |||
38815 | bool Updated = false; | |||
38816 | bool UseInput00 = false; | |||
38817 | bool UseInput01 = false; | |||
38818 | for (int i = 0; i != 4; ++i) { | |||
38819 | if ((InsertPSMask & (1u << i)) || (i == (int)DstIdx)) { | |||
38820 | // No change if element is already zero or the inserted element. | |||
38821 | continue; | |||
38822 | } else if (KnownUndef0[i] || KnownZero0[i]) { | |||
38823 | // If the target mask is undef/zero then we must zero the element. | |||
38824 | InsertPSMask |= (1u << i); | |||
38825 | Updated = true; | |||
38826 | continue; | |||
38827 | } | |||
38828 | ||||
38829 | // The input vector element must be inline. | |||
38830 | int M = TargetMask0[i]; | |||
38831 | if (M != i && M != (i + 4)) | |||
38832 | return SDValue(); | |||
38833 | ||||
38834 | // Determine which inputs of the target shuffle we're using. | |||
38835 | UseInput00 |= (0 <= M && M < 4); | |||
38836 | UseInput01 |= (4 <= M); | |||
38837 | } | |||
38838 | ||||
38839 | // If we're not using both inputs of the target shuffle then use the | |||
38840 | // referenced input directly. | |||
38841 | if (UseInput00 && !UseInput01) { | |||
38842 | Updated = true; | |||
38843 | Op0 = Ops0[0]; | |||
38844 | } else if (!UseInput00 && UseInput01) { | |||
38845 | Updated = true; | |||
38846 | Op0 = Ops0[1]; | |||
38847 | } | |||
38848 | ||||
38849 | if (Updated) | |||
38850 | return DAG.getNode(X86ISD::INSERTPS, DL, VT, Op0, Op1, | |||
38851 | DAG.getTargetConstant(InsertPSMask, DL, MVT::i8)); | |||
38852 | } | |||
38853 | ||||
38854 | // If we're inserting an element from a vbroadcast load, fold the | |||
38855 | // load into the X86insertps instruction. We need to convert the scalar | |||
38856 | // load to a vector and clear the source lane of the INSERTPS control. | |||
38857 | if (Op1.getOpcode() == X86ISD::VBROADCAST_LOAD && Op1.hasOneUse()) { | |||
38858 | auto *MemIntr = cast<MemIntrinsicSDNode>(Op1); | |||
38859 | if (MemIntr->getMemoryVT().getScalarSizeInBits() == 32) { | |||
38860 | SDValue Load = DAG.getLoad(MVT::f32, DL, MemIntr->getChain(), | |||
38861 | MemIntr->getBasePtr(), | |||
38862 | MemIntr->getMemOperand()); | |||
38863 | SDValue Insert = DAG.getNode(X86ISD::INSERTPS, DL, VT, Op0, | |||
38864 | DAG.getNode(ISD::SCALAR_TO_VECTOR, DL, VT, | |||
38865 | Load), | |||
38866 | DAG.getTargetConstant(InsertPSMask & 0x3f, DL, MVT::i8)); | |||
38867 | DAG.ReplaceAllUsesOfValueWith(SDValue(MemIntr, 1), Load.getValue(1)); | |||
38868 | return Insert; | |||
38869 | } | |||
38870 | } | |||
38871 | ||||
38872 | return SDValue(); | |||
38873 | } | |||
38874 | default: | |||
38875 | return SDValue(); | |||
38876 | } | |||
38877 | ||||
38878 | // Nuke no-op shuffles that show up after combining. | |||
38879 | if (isNoopShuffleMask(Mask)) | |||
38880 | return N.getOperand(0); | |||
38881 | ||||
38882 | // Look for simplifications involving one or two shuffle instructions. | |||
38883 | SDValue V = N.getOperand(0); | |||
38884 | switch (N.getOpcode()) { | |||
38885 | default: | |||
38886 | break; | |||
38887 | case X86ISD::PSHUFLW: | |||
38888 | case X86ISD::PSHUFHW: | |||
38889 | assert(VT.getVectorElementType() == MVT::i16 && "Bad word shuffle type!")(static_cast <bool> (VT.getVectorElementType() == MVT:: i16 && "Bad word shuffle type!") ? void (0) : __assert_fail ("VT.getVectorElementType() == MVT::i16 && \"Bad word shuffle type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 38889, __extension__ __PRETTY_FUNCTION__)); | |||
38890 | ||||
38891 | // See if this reduces to a PSHUFD which is no more expensive and can | |||
38892 | // combine with more operations. Note that it has to at least flip the | |||
38893 | // dwords as otherwise it would have been removed as a no-op. | |||
38894 | if (makeArrayRef(Mask).equals({2, 3, 0, 1})) { | |||
38895 | int DMask[] = {0, 1, 2, 3}; | |||
38896 | int DOffset = N.getOpcode() == X86ISD::PSHUFLW ? 0 : 2; | |||
38897 | DMask[DOffset + 0] = DOffset + 1; | |||
38898 | DMask[DOffset + 1] = DOffset + 0; | |||
38899 | MVT DVT = MVT::getVectorVT(MVT::i32, VT.getVectorNumElements() / 2); | |||
38900 | V = DAG.getBitcast(DVT, V); | |||
38901 | V = DAG.getNode(X86ISD::PSHUFD, DL, DVT, V, | |||
38902 | getV4X86ShuffleImm8ForMask(DMask, DL, DAG)); | |||
38903 | return DAG.getBitcast(VT, V); | |||
38904 | } | |||
38905 | ||||
38906 | // Look for shuffle patterns which can be implemented as a single unpack. | |||
38907 | // FIXME: This doesn't handle the location of the PSHUFD generically, and | |||
38908 | // only works when we have a PSHUFD followed by two half-shuffles. | |||
38909 | if (Mask[0] == Mask[1] && Mask[2] == Mask[3] && | |||
38910 | (V.getOpcode() == X86ISD::PSHUFLW || | |||
38911 | V.getOpcode() == X86ISD::PSHUFHW) && | |||
38912 | V.getOpcode() != N.getOpcode() && | |||
38913 | V.hasOneUse() && V.getOperand(0).hasOneUse()) { | |||
38914 | SDValue D = peekThroughOneUseBitcasts(V.getOperand(0)); | |||
38915 | if (D.getOpcode() == X86ISD::PSHUFD) { | |||
38916 | SmallVector<int, 4> VMask = getPSHUFShuffleMask(V); | |||
38917 | SmallVector<int, 4> DMask = getPSHUFShuffleMask(D); | |||
38918 | int NOffset = N.getOpcode() == X86ISD::PSHUFLW ? 0 : 4; | |||
38919 | int VOffset = V.getOpcode() == X86ISD::PSHUFLW ? 0 : 4; | |||
38920 | int WordMask[8]; | |||
38921 | for (int i = 0; i < 4; ++i) { | |||
38922 | WordMask[i + NOffset] = Mask[i] + NOffset; | |||
38923 | WordMask[i + VOffset] = VMask[i] + VOffset; | |||
38924 | } | |||
38925 | // Map the word mask through the DWord mask. | |||
38926 | int MappedMask[8]; | |||
38927 | for (int i = 0; i < 8; ++i) | |||
38928 | MappedMask[i] = 2 * DMask[WordMask[i] / 2] + WordMask[i] % 2; | |||
38929 | if (makeArrayRef(MappedMask).equals({0, 0, 1, 1, 2, 2, 3, 3}) || | |||
38930 | makeArrayRef(MappedMask).equals({4, 4, 5, 5, 6, 6, 7, 7})) { | |||
38931 | // We can replace all three shuffles with an unpack. | |||
38932 | V = DAG.getBitcast(VT, D.getOperand(0)); | |||
38933 | return DAG.getNode(MappedMask[0] == 0 ? X86ISD::UNPCKL | |||
38934 | : X86ISD::UNPCKH, | |||
38935 | DL, VT, V, V); | |||
38936 | } | |||
38937 | } | |||
38938 | } | |||
38939 | ||||
38940 | break; | |||
38941 | ||||
38942 | case X86ISD::PSHUFD: | |||
38943 | if (SDValue NewN = combineRedundantDWordShuffle(N, Mask, DAG)) | |||
38944 | return NewN; | |||
38945 | ||||
38946 | break; | |||
38947 | } | |||
38948 | ||||
38949 | return SDValue(); | |||
38950 | } | |||
38951 | ||||
38952 | /// Checks if the shuffle mask takes subsequent elements | |||
38953 | /// alternately from two vectors. | |||
38954 | /// For example <0, 5, 2, 7> or <8, 1, 10, 3, 12, 5, 14, 7> are both correct. | |||
38955 | static bool isAddSubOrSubAddMask(ArrayRef<int> Mask, bool &Op0Even) { | |||
38956 | ||||
38957 | int ParitySrc[2] = {-1, -1}; | |||
38958 | unsigned Size = Mask.size(); | |||
38959 | for (unsigned i = 0; i != Size; ++i) { | |||
38960 | int M = Mask[i]; | |||
38961 | if (M < 0) | |||
38962 | continue; | |||
38963 | ||||
38964 | // Make sure we are using the matching element from the input. | |||
38965 | if ((M % Size) != i) | |||
38966 | return false; | |||
38967 | ||||
38968 | // Make sure we use the same input for all elements of the same parity. | |||
38969 | int Src = M / Size; | |||
38970 | if (ParitySrc[i % 2] >= 0 && ParitySrc[i % 2] != Src) | |||
38971 | return false; | |||
38972 | ParitySrc[i % 2] = Src; | |||
38973 | } | |||
38974 | ||||
38975 | // Make sure each input is used. | |||
38976 | if (ParitySrc[0] < 0 || ParitySrc[1] < 0 || ParitySrc[0] == ParitySrc[1]) | |||
38977 | return false; | |||
38978 | ||||
38979 | Op0Even = ParitySrc[0] == 0; | |||
38980 | return true; | |||
38981 | } | |||
38982 | ||||
38983 | /// Returns true iff the shuffle node \p N can be replaced with ADDSUB(SUBADD) | |||
38984 | /// operation. If true is returned then the operands of ADDSUB(SUBADD) operation | |||
38985 | /// are written to the parameters \p Opnd0 and \p Opnd1. | |||
38986 | /// | |||
38987 | /// We combine shuffle to ADDSUB(SUBADD) directly on the abstract vector shuffle nodes | |||
38988 | /// so it is easier to generically match. We also insert dummy vector shuffle | |||
38989 | /// nodes for the operands which explicitly discard the lanes which are unused | |||
38990 | /// by this operation to try to flow through the rest of the combiner | |||
38991 | /// the fact that they're unused. | |||
38992 | static bool isAddSubOrSubAdd(SDNode *N, const X86Subtarget &Subtarget, | |||
38993 | SelectionDAG &DAG, SDValue &Opnd0, SDValue &Opnd1, | |||
38994 | bool &IsSubAdd) { | |||
38995 | ||||
38996 | EVT VT = N->getValueType(0); | |||
38997 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
38998 | if (!Subtarget.hasSSE3() || !TLI.isTypeLegal(VT) || | |||
38999 | !VT.getSimpleVT().isFloatingPoint()) | |||
39000 | return false; | |||
39001 | ||||
39002 | // We only handle target-independent shuffles. | |||
39003 | // FIXME: It would be easy and harmless to use the target shuffle mask | |||
39004 | // extraction tool to support more. | |||
39005 | if (N->getOpcode() != ISD::VECTOR_SHUFFLE) | |||
39006 | return false; | |||
39007 | ||||
39008 | SDValue V1 = N->getOperand(0); | |||
39009 | SDValue V2 = N->getOperand(1); | |||
39010 | ||||
39011 | // Make sure we have an FADD and an FSUB. | |||
39012 | if ((V1.getOpcode() != ISD::FADD && V1.getOpcode() != ISD::FSUB) || | |||
39013 | (V2.getOpcode() != ISD::FADD && V2.getOpcode() != ISD::FSUB) || | |||
39014 | V1.getOpcode() == V2.getOpcode()) | |||
39015 | return false; | |||
39016 | ||||
39017 | // If there are other uses of these operations we can't fold them. | |||
39018 | if (!V1->hasOneUse() || !V2->hasOneUse()) | |||
39019 | return false; | |||
39020 | ||||
39021 | // Ensure that both operations have the same operands. Note that we can | |||
39022 | // commute the FADD operands. | |||
39023 | SDValue LHS, RHS; | |||
39024 | if (V1.getOpcode() == ISD::FSUB) { | |||
39025 | LHS = V1->getOperand(0); RHS = V1->getOperand(1); | |||
39026 | if ((V2->getOperand(0) != LHS || V2->getOperand(1) != RHS) && | |||
39027 | (V2->getOperand(0) != RHS || V2->getOperand(1) != LHS)) | |||
39028 | return false; | |||
39029 | } else { | |||
39030 | assert(V2.getOpcode() == ISD::FSUB && "Unexpected opcode")(static_cast <bool> (V2.getOpcode() == ISD::FSUB && "Unexpected opcode") ? void (0) : __assert_fail ("V2.getOpcode() == ISD::FSUB && \"Unexpected opcode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 39030, __extension__ __PRETTY_FUNCTION__)); | |||
39031 | LHS = V2->getOperand(0); RHS = V2->getOperand(1); | |||
39032 | if ((V1->getOperand(0) != LHS || V1->getOperand(1) != RHS) && | |||
39033 | (V1->getOperand(0) != RHS || V1->getOperand(1) != LHS)) | |||
39034 | return false; | |||
39035 | } | |||
39036 | ||||
39037 | ArrayRef<int> Mask = cast<ShuffleVectorSDNode>(N)->getMask(); | |||
39038 | bool Op0Even; | |||
39039 | if (!isAddSubOrSubAddMask(Mask, Op0Even)) | |||
39040 | return false; | |||
39041 | ||||
39042 | // It's a subadd if the vector in the even parity is an FADD. | |||
39043 | IsSubAdd = Op0Even ? V1->getOpcode() == ISD::FADD | |||
39044 | : V2->getOpcode() == ISD::FADD; | |||
39045 | ||||
39046 | Opnd0 = LHS; | |||
39047 | Opnd1 = RHS; | |||
39048 | return true; | |||
39049 | } | |||
39050 | ||||
39051 | /// Combine shuffle of two fma nodes into FMAddSub or FMSubAdd. | |||
39052 | static SDValue combineShuffleToFMAddSub(SDNode *N, | |||
39053 | const X86Subtarget &Subtarget, | |||
39054 | SelectionDAG &DAG) { | |||
39055 | // We only handle target-independent shuffles. | |||
39056 | // FIXME: It would be easy and harmless to use the target shuffle mask | |||
39057 | // extraction tool to support more. | |||
39058 | if (N->getOpcode() != ISD::VECTOR_SHUFFLE) | |||
39059 | return SDValue(); | |||
39060 | ||||
39061 | MVT VT = N->getSimpleValueType(0); | |||
39062 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
39063 | if (!Subtarget.hasAnyFMA() || !TLI.isTypeLegal(VT)) | |||
39064 | return SDValue(); | |||
39065 | ||||
39066 | // We're trying to match (shuffle fma(a, b, c), X86Fmsub(a, b, c). | |||
39067 | SDValue Op0 = N->getOperand(0); | |||
39068 | SDValue Op1 = N->getOperand(1); | |||
39069 | SDValue FMAdd = Op0, FMSub = Op1; | |||
39070 | if (FMSub.getOpcode() != X86ISD::FMSUB) | |||
39071 | std::swap(FMAdd, FMSub); | |||
39072 | ||||
39073 | if (FMAdd.getOpcode() != ISD::FMA || FMSub.getOpcode() != X86ISD::FMSUB || | |||
39074 | FMAdd.getOperand(0) != FMSub.getOperand(0) || !FMAdd.hasOneUse() || | |||
39075 | FMAdd.getOperand(1) != FMSub.getOperand(1) || !FMSub.hasOneUse() || | |||
39076 | FMAdd.getOperand(2) != FMSub.getOperand(2)) | |||
39077 | return SDValue(); | |||
39078 | ||||
39079 | // Check for correct shuffle mask. | |||
39080 | ArrayRef<int> Mask = cast<ShuffleVectorSDNode>(N)->getMask(); | |||
39081 | bool Op0Even; | |||
39082 | if (!isAddSubOrSubAddMask(Mask, Op0Even)) | |||
39083 | return SDValue(); | |||
39084 | ||||
39085 | // FMAddSub takes zeroth operand from FMSub node. | |||
39086 | SDLoc DL(N); | |||
39087 | bool IsSubAdd = Op0Even ? Op0 == FMAdd : Op1 == FMAdd; | |||
39088 | unsigned Opcode = IsSubAdd ? X86ISD::FMSUBADD : X86ISD::FMADDSUB; | |||
39089 | return DAG.getNode(Opcode, DL, VT, FMAdd.getOperand(0), FMAdd.getOperand(1), | |||
39090 | FMAdd.getOperand(2)); | |||
39091 | } | |||
39092 | ||||
39093 | /// Try to combine a shuffle into a target-specific add-sub or | |||
39094 | /// mul-add-sub node. | |||
39095 | static SDValue combineShuffleToAddSubOrFMAddSub(SDNode *N, | |||
39096 | const X86Subtarget &Subtarget, | |||
39097 | SelectionDAG &DAG) { | |||
39098 | if (SDValue V = combineShuffleToFMAddSub(N, Subtarget, DAG)) | |||
39099 | return V; | |||
39100 | ||||
39101 | SDValue Opnd0, Opnd1; | |||
39102 | bool IsSubAdd; | |||
39103 | if (!isAddSubOrSubAdd(N, Subtarget, DAG, Opnd0, Opnd1, IsSubAdd)) | |||
39104 | return SDValue(); | |||
39105 | ||||
39106 | MVT VT = N->getSimpleValueType(0); | |||
39107 | SDLoc DL(N); | |||
39108 | ||||
39109 | // Try to generate X86ISD::FMADDSUB node here. | |||
39110 | SDValue Opnd2; | |||
39111 | if (isFMAddSubOrFMSubAdd(Subtarget, DAG, Opnd0, Opnd1, Opnd2, 2)) { | |||
39112 | unsigned Opc = IsSubAdd ? X86ISD::FMSUBADD : X86ISD::FMADDSUB; | |||
39113 | return DAG.getNode(Opc, DL, VT, Opnd0, Opnd1, Opnd2); | |||
39114 | } | |||
39115 | ||||
39116 | if (IsSubAdd) | |||
39117 | return SDValue(); | |||
39118 | ||||
39119 | // Do not generate X86ISD::ADDSUB node for 512-bit types even though | |||
39120 | // the ADDSUB idiom has been successfully recognized. There are no known | |||
39121 | // X86 targets with 512-bit ADDSUB instructions! | |||
39122 | if (VT.is512BitVector()) | |||
39123 | return SDValue(); | |||
39124 | ||||
39125 | // Do not generate X86ISD::ADDSUB node for FP16's vector types even though | |||
39126 | // the ADDSUB idiom has been successfully recognized. There are no known | |||
39127 | // X86 targets with FP16 ADDSUB instructions! | |||
39128 | if (VT.getVectorElementType() == MVT::f16) | |||
39129 | return SDValue(); | |||
39130 | ||||
39131 | return DAG.getNode(X86ISD::ADDSUB, DL, VT, Opnd0, Opnd1); | |||
39132 | } | |||
39133 | ||||
39134 | // We are looking for a shuffle where both sources are concatenated with undef | |||
39135 | // and have a width that is half of the output's width. AVX2 has VPERMD/Q, so | |||
39136 | // if we can express this as a single-source shuffle, that's preferable. | |||
39137 | static SDValue combineShuffleOfConcatUndef(SDNode *N, SelectionDAG &DAG, | |||
39138 | const X86Subtarget &Subtarget) { | |||
39139 | if (!Subtarget.hasAVX2() || !isa<ShuffleVectorSDNode>(N)) | |||
39140 | return SDValue(); | |||
39141 | ||||
39142 | EVT VT = N->getValueType(0); | |||
39143 | ||||
39144 | // We only care about shuffles of 128/256-bit vectors of 32/64-bit values. | |||
39145 | if (!VT.is128BitVector() && !VT.is256BitVector()) | |||
39146 | return SDValue(); | |||
39147 | ||||
39148 | if (VT.getVectorElementType() != MVT::i32 && | |||
39149 | VT.getVectorElementType() != MVT::i64 && | |||
39150 | VT.getVectorElementType() != MVT::f32 && | |||
39151 | VT.getVectorElementType() != MVT::f64) | |||
39152 | return SDValue(); | |||
39153 | ||||
39154 | SDValue N0 = N->getOperand(0); | |||
39155 | SDValue N1 = N->getOperand(1); | |||
39156 | ||||
39157 | // Check that both sources are concats with undef. | |||
39158 | if (N0.getOpcode() != ISD::CONCAT_VECTORS || | |||
39159 | N1.getOpcode() != ISD::CONCAT_VECTORS || N0.getNumOperands() != 2 || | |||
39160 | N1.getNumOperands() != 2 || !N0.getOperand(1).isUndef() || | |||
39161 | !N1.getOperand(1).isUndef()) | |||
39162 | return SDValue(); | |||
39163 | ||||
39164 | // Construct the new shuffle mask. Elements from the first source retain their | |||
39165 | // index, but elements from the second source no longer need to skip an undef. | |||
39166 | SmallVector<int, 8> Mask; | |||
39167 | int NumElts = VT.getVectorNumElements(); | |||
39168 | ||||
39169 | ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N); | |||
39170 | for (int Elt : SVOp->getMask()) | |||
39171 | Mask.push_back(Elt < NumElts ? Elt : (Elt - NumElts / 2)); | |||
39172 | ||||
39173 | SDLoc DL(N); | |||
39174 | SDValue Concat = DAG.getNode(ISD::CONCAT_VECTORS, DL, VT, N0.getOperand(0), | |||
39175 | N1.getOperand(0)); | |||
39176 | return DAG.getVectorShuffle(VT, DL, Concat, DAG.getUNDEF(VT), Mask); | |||
39177 | } | |||
39178 | ||||
39179 | /// If we have a shuffle of AVX/AVX512 (256/512 bit) vectors that only uses the | |||
39180 | /// low half of each source vector and does not set any high half elements in | |||
39181 | /// the destination vector, narrow the shuffle to half its original size. | |||
39182 | static SDValue narrowShuffle(ShuffleVectorSDNode *Shuf, SelectionDAG &DAG) { | |||
39183 | if (!Shuf->getValueType(0).isSimple()) | |||
39184 | return SDValue(); | |||
39185 | MVT VT = Shuf->getSimpleValueType(0); | |||
39186 | if (!VT.is256BitVector() && !VT.is512BitVector()) | |||
39187 | return SDValue(); | |||
39188 | ||||
39189 | // See if we can ignore all of the high elements of the shuffle. | |||
39190 | ArrayRef<int> Mask = Shuf->getMask(); | |||
39191 | if (!isUndefUpperHalf(Mask)) | |||
39192 | return SDValue(); | |||
39193 | ||||
39194 | // Check if the shuffle mask accesses only the low half of each input vector | |||
39195 | // (half-index output is 0 or 2). | |||
39196 | int HalfIdx1, HalfIdx2; | |||
39197 | SmallVector<int, 8> HalfMask(Mask.size() / 2); | |||
39198 | if (!getHalfShuffleMask(Mask, HalfMask, HalfIdx1, HalfIdx2) || | |||
39199 | (HalfIdx1 % 2 == 1) || (HalfIdx2 % 2 == 1)) | |||
39200 | return SDValue(); | |||
39201 | ||||
39202 | // Create a half-width shuffle to replace the unnecessarily wide shuffle. | |||
39203 | // The trick is knowing that all of the insert/extract are actually free | |||
39204 | // subregister (zmm<->ymm or ymm<->xmm) ops. That leaves us with a shuffle | |||
39205 | // of narrow inputs into a narrow output, and that is always cheaper than | |||
39206 | // the wide shuffle that we started with. | |||
39207 | return getShuffleHalfVectors(SDLoc(Shuf), Shuf->getOperand(0), | |||
39208 | Shuf->getOperand(1), HalfMask, HalfIdx1, | |||
39209 | HalfIdx2, false, DAG, /*UseConcat*/true); | |||
39210 | } | |||
39211 | ||||
39212 | static SDValue combineShuffle(SDNode *N, SelectionDAG &DAG, | |||
39213 | TargetLowering::DAGCombinerInfo &DCI, | |||
39214 | const X86Subtarget &Subtarget) { | |||
39215 | if (auto *Shuf = dyn_cast<ShuffleVectorSDNode>(N)) | |||
39216 | if (SDValue V = narrowShuffle(Shuf, DAG)) | |||
39217 | return V; | |||
39218 | ||||
39219 | // If we have legalized the vector types, look for blends of FADD and FSUB | |||
39220 | // nodes that we can fuse into an ADDSUB, FMADDSUB, or FMSUBADD node. | |||
39221 | SDLoc dl(N); | |||
39222 | EVT VT = N->getValueType(0); | |||
39223 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
39224 | if (TLI.isTypeLegal(VT)) | |||
39225 | if (SDValue AddSub = combineShuffleToAddSubOrFMAddSub(N, Subtarget, DAG)) | |||
39226 | return AddSub; | |||
39227 | ||||
39228 | // Attempt to combine into a vector load/broadcast. | |||
39229 | if (SDValue LD = combineToConsecutiveLoads( | |||
39230 | VT, SDValue(N, 0), dl, DAG, Subtarget, /*IsAfterLegalize*/ true)) | |||
39231 | return LD; | |||
39232 | ||||
39233 | // For AVX2, we sometimes want to combine | |||
39234 | // (vector_shuffle <mask> (concat_vectors t1, undef) | |||
39235 | // (concat_vectors t2, undef)) | |||
39236 | // Into: | |||
39237 | // (vector_shuffle <mask> (concat_vectors t1, t2), undef) | |||
39238 | // Since the latter can be efficiently lowered with VPERMD/VPERMQ | |||
39239 | if (SDValue ShufConcat = combineShuffleOfConcatUndef(N, DAG, Subtarget)) | |||
39240 | return ShufConcat; | |||
39241 | ||||
39242 | if (isTargetShuffle(N->getOpcode())) { | |||
39243 | SDValue Op(N, 0); | |||
39244 | if (SDValue Shuffle = combineTargetShuffle(Op, DAG, DCI, Subtarget)) | |||
39245 | return Shuffle; | |||
39246 | ||||
39247 | // Try recursively combining arbitrary sequences of x86 shuffle | |||
39248 | // instructions into higher-order shuffles. We do this after combining | |||
39249 | // specific PSHUF instruction sequences into their minimal form so that we | |||
39250 | // can evaluate how many specialized shuffle instructions are involved in | |||
39251 | // a particular chain. | |||
39252 | if (SDValue Res = combineX86ShufflesRecursively(Op, DAG, Subtarget)) | |||
39253 | return Res; | |||
39254 | ||||
39255 | // Simplify source operands based on shuffle mask. | |||
39256 | // TODO - merge this into combineX86ShufflesRecursively. | |||
39257 | APInt KnownUndef, KnownZero; | |||
39258 | APInt DemandedElts = APInt::getAllOnesValue(VT.getVectorNumElements()); | |||
39259 | if (TLI.SimplifyDemandedVectorElts(Op, DemandedElts, KnownUndef, KnownZero, | |||
39260 | DCI)) | |||
39261 | return SDValue(N, 0); | |||
39262 | } | |||
39263 | ||||
39264 | return SDValue(); | |||
39265 | } | |||
39266 | ||||
39267 | // Simplify variable target shuffle masks based on the demanded elements. | |||
39268 | // TODO: Handle DemandedBits in mask indices as well? | |||
39269 | bool X86TargetLowering::SimplifyDemandedVectorEltsForTargetShuffle( | |||
39270 | SDValue Op, const APInt &DemandedElts, unsigned MaskIndex, | |||
39271 | TargetLowering::TargetLoweringOpt &TLO, unsigned Depth) const { | |||
39272 | // If we're demanding all elements don't bother trying to simplify the mask. | |||
39273 | unsigned NumElts = DemandedElts.getBitWidth(); | |||
39274 | if (DemandedElts.isAllOnesValue()) | |||
39275 | return false; | |||
39276 | ||||
39277 | SDValue Mask = Op.getOperand(MaskIndex); | |||
39278 | if (!Mask.hasOneUse()) | |||
39279 | return false; | |||
39280 | ||||
39281 | // Attempt to generically simplify the variable shuffle mask. | |||
39282 | APInt MaskUndef, MaskZero; | |||
39283 | if (SimplifyDemandedVectorElts(Mask, DemandedElts, MaskUndef, MaskZero, TLO, | |||
39284 | Depth + 1)) | |||
39285 | return true; | |||
39286 | ||||
39287 | // Attempt to extract+simplify a (constant pool load) shuffle mask. | |||
39288 | // TODO: Support other types from getTargetShuffleMaskIndices? | |||
39289 | SDValue BC = peekThroughOneUseBitcasts(Mask); | |||
39290 | EVT BCVT = BC.getValueType(); | |||
39291 | auto *Load = dyn_cast<LoadSDNode>(BC); | |||
39292 | if (!Load) | |||
39293 | return false; | |||
39294 | ||||
39295 | const Constant *C = getTargetConstantFromNode(Load); | |||
39296 | if (!C) | |||
39297 | return false; | |||
39298 | ||||
39299 | Type *CTy = C->getType(); | |||
39300 | if (!CTy->isVectorTy() || | |||
39301 | CTy->getPrimitiveSizeInBits() != Mask.getValueSizeInBits()) | |||
39302 | return false; | |||
39303 | ||||
39304 | // Handle scaling for i64 elements on 32-bit targets. | |||
39305 | unsigned NumCstElts = cast<FixedVectorType>(CTy)->getNumElements(); | |||
39306 | if (NumCstElts != NumElts && NumCstElts != (NumElts * 2)) | |||
39307 | return false; | |||
39308 | unsigned Scale = NumCstElts / NumElts; | |||
39309 | ||||
39310 | // Simplify mask if we have an undemanded element that is not undef. | |||
39311 | bool Simplified = false; | |||
39312 | SmallVector<Constant *, 32> ConstVecOps; | |||
39313 | for (unsigned i = 0; i != NumCstElts; ++i) { | |||
39314 | Constant *Elt = C->getAggregateElement(i); | |||
39315 | if (!DemandedElts[i / Scale] && !isa<UndefValue>(Elt)) { | |||
39316 | ConstVecOps.push_back(UndefValue::get(Elt->getType())); | |||
39317 | Simplified = true; | |||
39318 | continue; | |||
39319 | } | |||
39320 | ConstVecOps.push_back(Elt); | |||
39321 | } | |||
39322 | if (!Simplified) | |||
39323 | return false; | |||
39324 | ||||
39325 | // Generate new constant pool entry + legalize immediately for the load. | |||
39326 | SDLoc DL(Op); | |||
39327 | SDValue CV = TLO.DAG.getConstantPool(ConstantVector::get(ConstVecOps), BCVT); | |||
39328 | SDValue LegalCV = LowerConstantPool(CV, TLO.DAG); | |||
39329 | SDValue NewMask = TLO.DAG.getLoad( | |||
39330 | BCVT, DL, TLO.DAG.getEntryNode(), LegalCV, | |||
39331 | MachinePointerInfo::getConstantPool(TLO.DAG.getMachineFunction()), | |||
39332 | Load->getAlign()); | |||
39333 | return TLO.CombineTo(Mask, TLO.DAG.getBitcast(Mask.getValueType(), NewMask)); | |||
39334 | } | |||
39335 | ||||
39336 | bool X86TargetLowering::SimplifyDemandedVectorEltsForTargetNode( | |||
39337 | SDValue Op, const APInt &DemandedElts, APInt &KnownUndef, APInt &KnownZero, | |||
39338 | TargetLoweringOpt &TLO, unsigned Depth) const { | |||
39339 | int NumElts = DemandedElts.getBitWidth(); | |||
39340 | unsigned Opc = Op.getOpcode(); | |||
39341 | EVT VT = Op.getValueType(); | |||
39342 | ||||
39343 | // Handle special case opcodes. | |||
39344 | switch (Opc) { | |||
39345 | case X86ISD::PMULDQ: | |||
39346 | case X86ISD::PMULUDQ: { | |||
39347 | APInt LHSUndef, LHSZero; | |||
39348 | APInt RHSUndef, RHSZero; | |||
39349 | SDValue LHS = Op.getOperand(0); | |||
39350 | SDValue RHS = Op.getOperand(1); | |||
39351 | if (SimplifyDemandedVectorElts(LHS, DemandedElts, LHSUndef, LHSZero, TLO, | |||
39352 | Depth + 1)) | |||
39353 | return true; | |||
39354 | if (SimplifyDemandedVectorElts(RHS, DemandedElts, RHSUndef, RHSZero, TLO, | |||
39355 | Depth + 1)) | |||
39356 | return true; | |||
39357 | // Multiply by zero. | |||
39358 | KnownZero = LHSZero | RHSZero; | |||
39359 | break; | |||
39360 | } | |||
39361 | case X86ISD::VSHL: | |||
39362 | case X86ISD::VSRL: | |||
39363 | case X86ISD::VSRA: { | |||
39364 | // We only need the bottom 64-bits of the (128-bit) shift amount. | |||
39365 | SDValue Amt = Op.getOperand(1); | |||
39366 | MVT AmtVT = Amt.getSimpleValueType(); | |||
39367 | assert(AmtVT.is128BitVector() && "Unexpected value type")(static_cast <bool> (AmtVT.is128BitVector() && "Unexpected value type" ) ? void (0) : __assert_fail ("AmtVT.is128BitVector() && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 39367, __extension__ __PRETTY_FUNCTION__)); | |||
39368 | ||||
39369 | // If we reuse the shift amount just for sse shift amounts then we know that | |||
39370 | // only the bottom 64-bits are only ever used. | |||
39371 | bool AssumeSingleUse = llvm::all_of(Amt->uses(), [&Amt](SDNode *Use) { | |||
39372 | unsigned UseOpc = Use->getOpcode(); | |||
39373 | return (UseOpc == X86ISD::VSHL || UseOpc == X86ISD::VSRL || | |||
39374 | UseOpc == X86ISD::VSRA) && | |||
39375 | Use->getOperand(0) != Amt; | |||
39376 | }); | |||
39377 | ||||
39378 | APInt AmtUndef, AmtZero; | |||
39379 | unsigned NumAmtElts = AmtVT.getVectorNumElements(); | |||
39380 | APInt AmtElts = APInt::getLowBitsSet(NumAmtElts, NumAmtElts / 2); | |||
39381 | if (SimplifyDemandedVectorElts(Amt, AmtElts, AmtUndef, AmtZero, TLO, | |||
39382 | Depth + 1, AssumeSingleUse)) | |||
39383 | return true; | |||
39384 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
39385 | } | |||
39386 | case X86ISD::VSHLI: | |||
39387 | case X86ISD::VSRLI: | |||
39388 | case X86ISD::VSRAI: { | |||
39389 | SDValue Src = Op.getOperand(0); | |||
39390 | APInt SrcUndef; | |||
39391 | if (SimplifyDemandedVectorElts(Src, DemandedElts, SrcUndef, KnownZero, TLO, | |||
39392 | Depth + 1)) | |||
39393 | return true; | |||
39394 | ||||
39395 | // Aggressively peek through ops to get at the demanded elts. | |||
39396 | if (!DemandedElts.isAllOnesValue()) | |||
39397 | if (SDValue NewSrc = SimplifyMultipleUseDemandedVectorElts( | |||
39398 | Src, DemandedElts, TLO.DAG, Depth + 1)) | |||
39399 | return TLO.CombineTo( | |||
39400 | Op, TLO.DAG.getNode(Opc, SDLoc(Op), VT, NewSrc, Op.getOperand(1))); | |||
39401 | break; | |||
39402 | } | |||
39403 | case X86ISD::KSHIFTL: { | |||
39404 | SDValue Src = Op.getOperand(0); | |||
39405 | auto *Amt = cast<ConstantSDNode>(Op.getOperand(1)); | |||
39406 | assert(Amt->getAPIntValue().ult(NumElts) && "Out of range shift amount")(static_cast <bool> (Amt->getAPIntValue().ult(NumElts ) && "Out of range shift amount") ? void (0) : __assert_fail ("Amt->getAPIntValue().ult(NumElts) && \"Out of range shift amount\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 39406, __extension__ __PRETTY_FUNCTION__)); | |||
39407 | unsigned ShiftAmt = Amt->getZExtValue(); | |||
39408 | ||||
39409 | if (ShiftAmt == 0) | |||
39410 | return TLO.CombineTo(Op, Src); | |||
39411 | ||||
39412 | // If this is ((X >>u C1) << ShAmt), see if we can simplify this into a | |||
39413 | // single shift. We can do this if the bottom bits (which are shifted | |||
39414 | // out) are never demanded. | |||
39415 | if (Src.getOpcode() == X86ISD::KSHIFTR) { | |||
39416 | if (!DemandedElts.intersects(APInt::getLowBitsSet(NumElts, ShiftAmt))) { | |||
39417 | unsigned C1 = Src.getConstantOperandVal(1); | |||
39418 | unsigned NewOpc = X86ISD::KSHIFTL; | |||
39419 | int Diff = ShiftAmt - C1; | |||
39420 | if (Diff < 0) { | |||
39421 | Diff = -Diff; | |||
39422 | NewOpc = X86ISD::KSHIFTR; | |||
39423 | } | |||
39424 | ||||
39425 | SDLoc dl(Op); | |||
39426 | SDValue NewSA = TLO.DAG.getTargetConstant(Diff, dl, MVT::i8); | |||
39427 | return TLO.CombineTo( | |||
39428 | Op, TLO.DAG.getNode(NewOpc, dl, VT, Src.getOperand(0), NewSA)); | |||
39429 | } | |||
39430 | } | |||
39431 | ||||
39432 | APInt DemandedSrc = DemandedElts.lshr(ShiftAmt); | |||
39433 | if (SimplifyDemandedVectorElts(Src, DemandedSrc, KnownUndef, KnownZero, TLO, | |||
39434 | Depth + 1)) | |||
39435 | return true; | |||
39436 | ||||
39437 | KnownUndef <<= ShiftAmt; | |||
39438 | KnownZero <<= ShiftAmt; | |||
39439 | KnownZero.setLowBits(ShiftAmt); | |||
39440 | break; | |||
39441 | } | |||
39442 | case X86ISD::KSHIFTR: { | |||
39443 | SDValue Src = Op.getOperand(0); | |||
39444 | auto *Amt = cast<ConstantSDNode>(Op.getOperand(1)); | |||
39445 | assert(Amt->getAPIntValue().ult(NumElts) && "Out of range shift amount")(static_cast <bool> (Amt->getAPIntValue().ult(NumElts ) && "Out of range shift amount") ? void (0) : __assert_fail ("Amt->getAPIntValue().ult(NumElts) && \"Out of range shift amount\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 39445, __extension__ __PRETTY_FUNCTION__)); | |||
39446 | unsigned ShiftAmt = Amt->getZExtValue(); | |||
39447 | ||||
39448 | if (ShiftAmt == 0) | |||
39449 | return TLO.CombineTo(Op, Src); | |||
39450 | ||||
39451 | // If this is ((X << C1) >>u ShAmt), see if we can simplify this into a | |||
39452 | // single shift. We can do this if the top bits (which are shifted | |||
39453 | // out) are never demanded. | |||
39454 | if (Src.getOpcode() == X86ISD::KSHIFTL) { | |||
39455 | if (!DemandedElts.intersects(APInt::getHighBitsSet(NumElts, ShiftAmt))) { | |||
39456 | unsigned C1 = Src.getConstantOperandVal(1); | |||
39457 | unsigned NewOpc = X86ISD::KSHIFTR; | |||
39458 | int Diff = ShiftAmt - C1; | |||
39459 | if (Diff < 0) { | |||
39460 | Diff = -Diff; | |||
39461 | NewOpc = X86ISD::KSHIFTL; | |||
39462 | } | |||
39463 | ||||
39464 | SDLoc dl(Op); | |||
39465 | SDValue NewSA = TLO.DAG.getTargetConstant(Diff, dl, MVT::i8); | |||
39466 | return TLO.CombineTo( | |||
39467 | Op, TLO.DAG.getNode(NewOpc, dl, VT, Src.getOperand(0), NewSA)); | |||
39468 | } | |||
39469 | } | |||
39470 | ||||
39471 | APInt DemandedSrc = DemandedElts.shl(ShiftAmt); | |||
39472 | if (SimplifyDemandedVectorElts(Src, DemandedSrc, KnownUndef, KnownZero, TLO, | |||
39473 | Depth + 1)) | |||
39474 | return true; | |||
39475 | ||||
39476 | KnownUndef.lshrInPlace(ShiftAmt); | |||
39477 | KnownZero.lshrInPlace(ShiftAmt); | |||
39478 | KnownZero.setHighBits(ShiftAmt); | |||
39479 | break; | |||
39480 | } | |||
39481 | case X86ISD::CVTSI2P: | |||
39482 | case X86ISD::CVTUI2P: { | |||
39483 | SDValue Src = Op.getOperand(0); | |||
39484 | MVT SrcVT = Src.getSimpleValueType(); | |||
39485 | APInt SrcUndef, SrcZero; | |||
39486 | APInt SrcElts = DemandedElts.zextOrTrunc(SrcVT.getVectorNumElements()); | |||
39487 | if (SimplifyDemandedVectorElts(Src, SrcElts, SrcUndef, SrcZero, TLO, | |||
39488 | Depth + 1)) | |||
39489 | return true; | |||
39490 | break; | |||
39491 | } | |||
39492 | case X86ISD::PACKSS: | |||
39493 | case X86ISD::PACKUS: { | |||
39494 | SDValue N0 = Op.getOperand(0); | |||
39495 | SDValue N1 = Op.getOperand(1); | |||
39496 | ||||
39497 | APInt DemandedLHS, DemandedRHS; | |||
39498 | getPackDemandedElts(VT, DemandedElts, DemandedLHS, DemandedRHS); | |||
39499 | ||||
39500 | APInt LHSUndef, LHSZero; | |||
39501 | if (SimplifyDemandedVectorElts(N0, DemandedLHS, LHSUndef, LHSZero, TLO, | |||
39502 | Depth + 1)) | |||
39503 | return true; | |||
39504 | APInt RHSUndef, RHSZero; | |||
39505 | if (SimplifyDemandedVectorElts(N1, DemandedRHS, RHSUndef, RHSZero, TLO, | |||
39506 | Depth + 1)) | |||
39507 | return true; | |||
39508 | ||||
39509 | // TODO - pass on known zero/undef. | |||
39510 | ||||
39511 | // Aggressively peek through ops to get at the demanded elts. | |||
39512 | // TODO - we should do this for all target/faux shuffles ops. | |||
39513 | if (!DemandedElts.isAllOnesValue()) { | |||
39514 | SDValue NewN0 = SimplifyMultipleUseDemandedVectorElts(N0, DemandedLHS, | |||
39515 | TLO.DAG, Depth + 1); | |||
39516 | SDValue NewN1 = SimplifyMultipleUseDemandedVectorElts(N1, DemandedRHS, | |||
39517 | TLO.DAG, Depth + 1); | |||
39518 | if (NewN0 || NewN1) { | |||
39519 | NewN0 = NewN0 ? NewN0 : N0; | |||
39520 | NewN1 = NewN1 ? NewN1 : N1; | |||
39521 | return TLO.CombineTo(Op, | |||
39522 | TLO.DAG.getNode(Opc, SDLoc(Op), VT, NewN0, NewN1)); | |||
39523 | } | |||
39524 | } | |||
39525 | break; | |||
39526 | } | |||
39527 | case X86ISD::HADD: | |||
39528 | case X86ISD::HSUB: | |||
39529 | case X86ISD::FHADD: | |||
39530 | case X86ISD::FHSUB: { | |||
39531 | SDValue N0 = Op.getOperand(0); | |||
39532 | SDValue N1 = Op.getOperand(1); | |||
39533 | ||||
39534 | APInt DemandedLHS, DemandedRHS; | |||
39535 | getHorizDemandedElts(VT, DemandedElts, DemandedLHS, DemandedRHS); | |||
39536 | ||||
39537 | APInt LHSUndef, LHSZero; | |||
39538 | if (SimplifyDemandedVectorElts(N0, DemandedLHS, LHSUndef, LHSZero, TLO, | |||
39539 | Depth + 1)) | |||
39540 | return true; | |||
39541 | APInt RHSUndef, RHSZero; | |||
39542 | if (SimplifyDemandedVectorElts(N1, DemandedRHS, RHSUndef, RHSZero, TLO, | |||
39543 | Depth + 1)) | |||
39544 | return true; | |||
39545 | ||||
39546 | // TODO - pass on known zero/undef. | |||
39547 | ||||
39548 | // Aggressively peek through ops to get at the demanded elts. | |||
39549 | // TODO: Handle repeated operands. | |||
39550 | if (N0 != N1 && !DemandedElts.isAllOnesValue()) { | |||
39551 | SDValue NewN0 = SimplifyMultipleUseDemandedVectorElts(N0, DemandedLHS, | |||
39552 | TLO.DAG, Depth + 1); | |||
39553 | SDValue NewN1 = SimplifyMultipleUseDemandedVectorElts(N1, DemandedRHS, | |||
39554 | TLO.DAG, Depth + 1); | |||
39555 | if (NewN0 || NewN1) { | |||
39556 | NewN0 = NewN0 ? NewN0 : N0; | |||
39557 | NewN1 = NewN1 ? NewN1 : N1; | |||
39558 | return TLO.CombineTo(Op, | |||
39559 | TLO.DAG.getNode(Opc, SDLoc(Op), VT, NewN0, NewN1)); | |||
39560 | } | |||
39561 | } | |||
39562 | break; | |||
39563 | } | |||
39564 | case X86ISD::VTRUNC: | |||
39565 | case X86ISD::VTRUNCS: | |||
39566 | case X86ISD::VTRUNCUS: { | |||
39567 | SDValue Src = Op.getOperand(0); | |||
39568 | MVT SrcVT = Src.getSimpleValueType(); | |||
39569 | APInt DemandedSrc = DemandedElts.zextOrTrunc(SrcVT.getVectorNumElements()); | |||
39570 | APInt SrcUndef, SrcZero; | |||
39571 | if (SimplifyDemandedVectorElts(Src, DemandedSrc, SrcUndef, SrcZero, TLO, | |||
39572 | Depth + 1)) | |||
39573 | return true; | |||
39574 | KnownZero = SrcZero.zextOrTrunc(NumElts); | |||
39575 | KnownUndef = SrcUndef.zextOrTrunc(NumElts); | |||
39576 | break; | |||
39577 | } | |||
39578 | case X86ISD::BLENDV: { | |||
39579 | APInt SelUndef, SelZero; | |||
39580 | if (SimplifyDemandedVectorElts(Op.getOperand(0), DemandedElts, SelUndef, | |||
39581 | SelZero, TLO, Depth + 1)) | |||
39582 | return true; | |||
39583 | ||||
39584 | // TODO: Use SelZero to adjust LHS/RHS DemandedElts. | |||
39585 | APInt LHSUndef, LHSZero; | |||
39586 | if (SimplifyDemandedVectorElts(Op.getOperand(1), DemandedElts, LHSUndef, | |||
39587 | LHSZero, TLO, Depth + 1)) | |||
39588 | return true; | |||
39589 | ||||
39590 | APInt RHSUndef, RHSZero; | |||
39591 | if (SimplifyDemandedVectorElts(Op.getOperand(2), DemandedElts, RHSUndef, | |||
39592 | RHSZero, TLO, Depth + 1)) | |||
39593 | return true; | |||
39594 | ||||
39595 | KnownZero = LHSZero & RHSZero; | |||
39596 | KnownUndef = LHSUndef & RHSUndef; | |||
39597 | break; | |||
39598 | } | |||
39599 | case X86ISD::VZEXT_MOVL: { | |||
39600 | // If upper demanded elements are already zero then we have nothing to do. | |||
39601 | SDValue Src = Op.getOperand(0); | |||
39602 | APInt DemandedUpperElts = DemandedElts; | |||
39603 | DemandedUpperElts.clearLowBits(1); | |||
39604 | if (TLO.DAG.computeKnownBits(Src, DemandedUpperElts, Depth + 1).isZero()) | |||
39605 | return TLO.CombineTo(Op, Src); | |||
39606 | break; | |||
39607 | } | |||
39608 | case X86ISD::VBROADCAST: { | |||
39609 | SDValue Src = Op.getOperand(0); | |||
39610 | MVT SrcVT = Src.getSimpleValueType(); | |||
39611 | if (!SrcVT.isVector()) | |||
39612 | break; | |||
39613 | // Don't bother broadcasting if we just need the 0'th element. | |||
39614 | if (DemandedElts == 1) { | |||
39615 | if (Src.getValueType() != VT) | |||
39616 | Src = widenSubVector(VT.getSimpleVT(), Src, false, Subtarget, TLO.DAG, | |||
39617 | SDLoc(Op)); | |||
39618 | return TLO.CombineTo(Op, Src); | |||
39619 | } | |||
39620 | APInt SrcUndef, SrcZero; | |||
39621 | APInt SrcElts = APInt::getOneBitSet(SrcVT.getVectorNumElements(), 0); | |||
39622 | if (SimplifyDemandedVectorElts(Src, SrcElts, SrcUndef, SrcZero, TLO, | |||
39623 | Depth + 1)) | |||
39624 | return true; | |||
39625 | // Aggressively peek through src to get at the demanded elt. | |||
39626 | // TODO - we should do this for all target/faux shuffles ops. | |||
39627 | if (SDValue NewSrc = SimplifyMultipleUseDemandedVectorElts( | |||
39628 | Src, SrcElts, TLO.DAG, Depth + 1)) | |||
39629 | return TLO.CombineTo(Op, TLO.DAG.getNode(Opc, SDLoc(Op), VT, NewSrc)); | |||
39630 | break; | |||
39631 | } | |||
39632 | case X86ISD::VPERMV: | |||
39633 | if (SimplifyDemandedVectorEltsForTargetShuffle(Op, DemandedElts, 0, TLO, | |||
39634 | Depth)) | |||
39635 | return true; | |||
39636 | break; | |||
39637 | case X86ISD::PSHUFB: | |||
39638 | case X86ISD::VPERMV3: | |||
39639 | case X86ISD::VPERMILPV: | |||
39640 | if (SimplifyDemandedVectorEltsForTargetShuffle(Op, DemandedElts, 1, TLO, | |||
39641 | Depth)) | |||
39642 | return true; | |||
39643 | break; | |||
39644 | case X86ISD::VPPERM: | |||
39645 | case X86ISD::VPERMIL2: | |||
39646 | if (SimplifyDemandedVectorEltsForTargetShuffle(Op, DemandedElts, 2, TLO, | |||
39647 | Depth)) | |||
39648 | return true; | |||
39649 | break; | |||
39650 | } | |||
39651 | ||||
39652 | // For 256/512-bit ops that are 128/256-bit ops glued together, if we do not | |||
39653 | // demand any of the high elements, then narrow the op to 128/256-bits: e.g. | |||
39654 | // (op ymm0, ymm1) --> insert undef, (op xmm0, xmm1), 0 | |||
39655 | if ((VT.is256BitVector() || VT.is512BitVector()) && | |||
39656 | DemandedElts.lshr(NumElts / 2) == 0) { | |||
39657 | unsigned SizeInBits = VT.getSizeInBits(); | |||
39658 | unsigned ExtSizeInBits = SizeInBits / 2; | |||
39659 | ||||
39660 | // See if 512-bit ops only use the bottom 128-bits. | |||
39661 | if (VT.is512BitVector() && DemandedElts.lshr(NumElts / 4) == 0) | |||
39662 | ExtSizeInBits = SizeInBits / 4; | |||
39663 | ||||
39664 | switch (Opc) { | |||
39665 | // Scalar broadcast. | |||
39666 | case X86ISD::VBROADCAST: { | |||
39667 | SDLoc DL(Op); | |||
39668 | SDValue Src = Op.getOperand(0); | |||
39669 | if (Src.getValueSizeInBits() > ExtSizeInBits) | |||
39670 | Src = extractSubVector(Src, 0, TLO.DAG, DL, ExtSizeInBits); | |||
39671 | EVT BcstVT = EVT::getVectorVT(*TLO.DAG.getContext(), VT.getScalarType(), | |||
39672 | ExtSizeInBits / VT.getScalarSizeInBits()); | |||
39673 | SDValue Bcst = TLO.DAG.getNode(X86ISD::VBROADCAST, DL, BcstVT, Src); | |||
39674 | return TLO.CombineTo(Op, insertSubVector(TLO.DAG.getUNDEF(VT), Bcst, 0, | |||
39675 | TLO.DAG, DL, ExtSizeInBits)); | |||
39676 | } | |||
39677 | case X86ISD::VBROADCAST_LOAD: { | |||
39678 | SDLoc DL(Op); | |||
39679 | auto *MemIntr = cast<MemIntrinsicSDNode>(Op); | |||
39680 | EVT BcstVT = EVT::getVectorVT(*TLO.DAG.getContext(), VT.getScalarType(), | |||
39681 | ExtSizeInBits / VT.getScalarSizeInBits()); | |||
39682 | SDVTList Tys = TLO.DAG.getVTList(BcstVT, MVT::Other); | |||
39683 | SDValue Ops[] = {MemIntr->getOperand(0), MemIntr->getOperand(1)}; | |||
39684 | SDValue Bcst = TLO.DAG.getMemIntrinsicNode( | |||
39685 | X86ISD::VBROADCAST_LOAD, DL, Tys, Ops, MemIntr->getMemoryVT(), | |||
39686 | MemIntr->getMemOperand()); | |||
39687 | TLO.DAG.makeEquivalentMemoryOrdering(SDValue(MemIntr, 1), | |||
39688 | Bcst.getValue(1)); | |||
39689 | return TLO.CombineTo(Op, insertSubVector(TLO.DAG.getUNDEF(VT), Bcst, 0, | |||
39690 | TLO.DAG, DL, ExtSizeInBits)); | |||
39691 | } | |||
39692 | // Subvector broadcast. | |||
39693 | case X86ISD::SUBV_BROADCAST_LOAD: { | |||
39694 | auto *MemIntr = cast<MemIntrinsicSDNode>(Op); | |||
39695 | EVT MemVT = MemIntr->getMemoryVT(); | |||
39696 | if (ExtSizeInBits == MemVT.getStoreSizeInBits()) { | |||
39697 | SDLoc DL(Op); | |||
39698 | SDValue Ld = | |||
39699 | TLO.DAG.getLoad(MemVT, DL, MemIntr->getChain(), | |||
39700 | MemIntr->getBasePtr(), MemIntr->getMemOperand()); | |||
39701 | TLO.DAG.makeEquivalentMemoryOrdering(SDValue(MemIntr, 1), | |||
39702 | Ld.getValue(1)); | |||
39703 | return TLO.CombineTo(Op, insertSubVector(TLO.DAG.getUNDEF(VT), Ld, 0, | |||
39704 | TLO.DAG, DL, ExtSizeInBits)); | |||
39705 | } else if ((ExtSizeInBits % MemVT.getStoreSizeInBits()) == 0) { | |||
39706 | SDLoc DL(Op); | |||
39707 | EVT BcstVT = EVT::getVectorVT(*TLO.DAG.getContext(), VT.getScalarType(), | |||
39708 | ExtSizeInBits / VT.getScalarSizeInBits()); | |||
39709 | SDVTList Tys = TLO.DAG.getVTList(BcstVT, MVT::Other); | |||
39710 | SDValue Ops[] = {MemIntr->getOperand(0), MemIntr->getOperand(1)}; | |||
39711 | SDValue Bcst = | |||
39712 | TLO.DAG.getMemIntrinsicNode(X86ISD::SUBV_BROADCAST_LOAD, DL, Tys, | |||
39713 | Ops, MemVT, MemIntr->getMemOperand()); | |||
39714 | TLO.DAG.makeEquivalentMemoryOrdering(SDValue(MemIntr, 1), | |||
39715 | Bcst.getValue(1)); | |||
39716 | return TLO.CombineTo(Op, insertSubVector(TLO.DAG.getUNDEF(VT), Bcst, 0, | |||
39717 | TLO.DAG, DL, ExtSizeInBits)); | |||
39718 | } | |||
39719 | break; | |||
39720 | } | |||
39721 | // Byte shifts by immediate. | |||
39722 | case X86ISD::VSHLDQ: | |||
39723 | case X86ISD::VSRLDQ: | |||
39724 | // Shift by uniform. | |||
39725 | case X86ISD::VSHL: | |||
39726 | case X86ISD::VSRL: | |||
39727 | case X86ISD::VSRA: | |||
39728 | // Shift by immediate. | |||
39729 | case X86ISD::VSHLI: | |||
39730 | case X86ISD::VSRLI: | |||
39731 | case X86ISD::VSRAI: { | |||
39732 | SDLoc DL(Op); | |||
39733 | SDValue Ext0 = | |||
39734 | extractSubVector(Op.getOperand(0), 0, TLO.DAG, DL, ExtSizeInBits); | |||
39735 | SDValue ExtOp = | |||
39736 | TLO.DAG.getNode(Opc, DL, Ext0.getValueType(), Ext0, Op.getOperand(1)); | |||
39737 | SDValue UndefVec = TLO.DAG.getUNDEF(VT); | |||
39738 | SDValue Insert = | |||
39739 | insertSubVector(UndefVec, ExtOp, 0, TLO.DAG, DL, ExtSizeInBits); | |||
39740 | return TLO.CombineTo(Op, Insert); | |||
39741 | } | |||
39742 | case X86ISD::VPERMI: { | |||
39743 | // Simplify PERMPD/PERMQ to extract_subvector. | |||
39744 | // TODO: This should be done in shuffle combining. | |||
39745 | if (VT == MVT::v4f64 || VT == MVT::v4i64) { | |||
39746 | SmallVector<int, 4> Mask; | |||
39747 | DecodeVPERMMask(NumElts, Op.getConstantOperandVal(1), Mask); | |||
39748 | if (isUndefOrEqual(Mask[0], 2) && isUndefOrEqual(Mask[1], 3)) { | |||
39749 | SDLoc DL(Op); | |||
39750 | SDValue Ext = extractSubVector(Op.getOperand(0), 2, TLO.DAG, DL, 128); | |||
39751 | SDValue UndefVec = TLO.DAG.getUNDEF(VT); | |||
39752 | SDValue Insert = insertSubVector(UndefVec, Ext, 0, TLO.DAG, DL, 128); | |||
39753 | return TLO.CombineTo(Op, Insert); | |||
39754 | } | |||
39755 | } | |||
39756 | break; | |||
39757 | } | |||
39758 | case X86ISD::VPERM2X128: { | |||
39759 | // Simplify VPERM2F128/VPERM2I128 to extract_subvector. | |||
39760 | SDLoc DL(Op); | |||
39761 | unsigned LoMask = Op.getConstantOperandVal(2) & 0xF; | |||
39762 | if (LoMask & 0x8) | |||
39763 | return TLO.CombineTo( | |||
39764 | Op, getZeroVector(VT.getSimpleVT(), Subtarget, TLO.DAG, DL)); | |||
39765 | unsigned EltIdx = (LoMask & 0x1) * (NumElts / 2); | |||
39766 | unsigned SrcIdx = (LoMask & 0x2) >> 1; | |||
39767 | SDValue ExtOp = | |||
39768 | extractSubVector(Op.getOperand(SrcIdx), EltIdx, TLO.DAG, DL, 128); | |||
39769 | SDValue UndefVec = TLO.DAG.getUNDEF(VT); | |||
39770 | SDValue Insert = | |||
39771 | insertSubVector(UndefVec, ExtOp, 0, TLO.DAG, DL, ExtSizeInBits); | |||
39772 | return TLO.CombineTo(Op, Insert); | |||
39773 | } | |||
39774 | // Zero upper elements. | |||
39775 | case X86ISD::VZEXT_MOVL: | |||
39776 | // Target unary shuffles by immediate: | |||
39777 | case X86ISD::PSHUFD: | |||
39778 | case X86ISD::PSHUFLW: | |||
39779 | case X86ISD::PSHUFHW: | |||
39780 | case X86ISD::VPERMILPI: | |||
39781 | // (Non-Lane Crossing) Target Shuffles. | |||
39782 | case X86ISD::VPERMILPV: | |||
39783 | case X86ISD::VPERMIL2: | |||
39784 | case X86ISD::PSHUFB: | |||
39785 | case X86ISD::UNPCKL: | |||
39786 | case X86ISD::UNPCKH: | |||
39787 | case X86ISD::BLENDI: | |||
39788 | // Integer ops. | |||
39789 | case X86ISD::AVG: | |||
39790 | case X86ISD::PACKSS: | |||
39791 | case X86ISD::PACKUS: | |||
39792 | // Horizontal Ops. | |||
39793 | case X86ISD::HADD: | |||
39794 | case X86ISD::HSUB: | |||
39795 | case X86ISD::FHADD: | |||
39796 | case X86ISD::FHSUB: { | |||
39797 | SDLoc DL(Op); | |||
39798 | SmallVector<SDValue, 4> Ops; | |||
39799 | for (unsigned i = 0, e = Op.getNumOperands(); i != e; ++i) { | |||
39800 | SDValue SrcOp = Op.getOperand(i); | |||
39801 | EVT SrcVT = SrcOp.getValueType(); | |||
39802 | assert((!SrcVT.isVector() || SrcVT.getSizeInBits() == SizeInBits) &&(static_cast <bool> ((!SrcVT.isVector() || SrcVT.getSizeInBits () == SizeInBits) && "Unsupported vector size") ? void (0) : __assert_fail ("(!SrcVT.isVector() || SrcVT.getSizeInBits() == SizeInBits) && \"Unsupported vector size\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 39803, __extension__ __PRETTY_FUNCTION__)) | |||
39803 | "Unsupported vector size")(static_cast <bool> ((!SrcVT.isVector() || SrcVT.getSizeInBits () == SizeInBits) && "Unsupported vector size") ? void (0) : __assert_fail ("(!SrcVT.isVector() || SrcVT.getSizeInBits() == SizeInBits) && \"Unsupported vector size\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 39803, __extension__ __PRETTY_FUNCTION__)); | |||
39804 | Ops.push_back(SrcVT.isVector() ? extractSubVector(SrcOp, 0, TLO.DAG, DL, | |||
39805 | ExtSizeInBits) | |||
39806 | : SrcOp); | |||
39807 | } | |||
39808 | MVT ExtVT = VT.getSimpleVT(); | |||
39809 | ExtVT = MVT::getVectorVT(ExtVT.getScalarType(), | |||
39810 | ExtSizeInBits / ExtVT.getScalarSizeInBits()); | |||
39811 | SDValue ExtOp = TLO.DAG.getNode(Opc, DL, ExtVT, Ops); | |||
39812 | SDValue UndefVec = TLO.DAG.getUNDEF(VT); | |||
39813 | SDValue Insert = | |||
39814 | insertSubVector(UndefVec, ExtOp, 0, TLO.DAG, DL, ExtSizeInBits); | |||
39815 | return TLO.CombineTo(Op, Insert); | |||
39816 | } | |||
39817 | } | |||
39818 | } | |||
39819 | ||||
39820 | // Get target/faux shuffle mask. | |||
39821 | APInt OpUndef, OpZero; | |||
39822 | SmallVector<int, 64> OpMask; | |||
39823 | SmallVector<SDValue, 2> OpInputs; | |||
39824 | if (!getTargetShuffleInputs(Op, DemandedElts, OpInputs, OpMask, OpUndef, | |||
39825 | OpZero, TLO.DAG, Depth, false)) | |||
39826 | return false; | |||
39827 | ||||
39828 | // Shuffle inputs must be the same size as the result. | |||
39829 | if (OpMask.size() != (unsigned)NumElts || | |||
39830 | llvm::any_of(OpInputs, [VT](SDValue V) { | |||
39831 | return VT.getSizeInBits() != V.getValueSizeInBits() || | |||
39832 | !V.getValueType().isVector(); | |||
39833 | })) | |||
39834 | return false; | |||
39835 | ||||
39836 | KnownZero = OpZero; | |||
39837 | KnownUndef = OpUndef; | |||
39838 | ||||
39839 | // Check if shuffle mask can be simplified to undef/zero/identity. | |||
39840 | int NumSrcs = OpInputs.size(); | |||
39841 | for (int i = 0; i != NumElts; ++i) | |||
39842 | if (!DemandedElts[i]) | |||
39843 | OpMask[i] = SM_SentinelUndef; | |||
39844 | ||||
39845 | if (isUndefInRange(OpMask, 0, NumElts)) { | |||
39846 | KnownUndef.setAllBits(); | |||
39847 | return TLO.CombineTo(Op, TLO.DAG.getUNDEF(VT)); | |||
39848 | } | |||
39849 | if (isUndefOrZeroInRange(OpMask, 0, NumElts)) { | |||
39850 | KnownZero.setAllBits(); | |||
39851 | return TLO.CombineTo( | |||
39852 | Op, getZeroVector(VT.getSimpleVT(), Subtarget, TLO.DAG, SDLoc(Op))); | |||
39853 | } | |||
39854 | for (int Src = 0; Src != NumSrcs; ++Src) | |||
39855 | if (isSequentialOrUndefInRange(OpMask, 0, NumElts, Src * NumElts)) | |||
39856 | return TLO.CombineTo(Op, TLO.DAG.getBitcast(VT, OpInputs[Src])); | |||
39857 | ||||
39858 | // Attempt to simplify inputs. | |||
39859 | for (int Src = 0; Src != NumSrcs; ++Src) { | |||
39860 | // TODO: Support inputs of different types. | |||
39861 | if (OpInputs[Src].getValueType() != VT) | |||
39862 | continue; | |||
39863 | ||||
39864 | int Lo = Src * NumElts; | |||
39865 | APInt SrcElts = APInt::getNullValue(NumElts); | |||
39866 | for (int i = 0; i != NumElts; ++i) | |||
39867 | if (DemandedElts[i]) { | |||
39868 | int M = OpMask[i] - Lo; | |||
39869 | if (0 <= M && M < NumElts) | |||
39870 | SrcElts.setBit(M); | |||
39871 | } | |||
39872 | ||||
39873 | // TODO - Propagate input undef/zero elts. | |||
39874 | APInt SrcUndef, SrcZero; | |||
39875 | if (SimplifyDemandedVectorElts(OpInputs[Src], SrcElts, SrcUndef, SrcZero, | |||
39876 | TLO, Depth + 1)) | |||
39877 | return true; | |||
39878 | } | |||
39879 | ||||
39880 | // If we don't demand all elements, then attempt to combine to a simpler | |||
39881 | // shuffle. | |||
39882 | // We need to convert the depth to something combineX86ShufflesRecursively | |||
39883 | // can handle - so pretend its Depth == 0 again, and reduce the max depth | |||
39884 | // to match. This prevents combineX86ShuffleChain from returning a | |||
39885 | // combined shuffle that's the same as the original root, causing an | |||
39886 | // infinite loop. | |||
39887 | if (!DemandedElts.isAllOnesValue()) { | |||
39888 | assert(Depth < X86::MaxShuffleCombineDepth && "Depth out of range")(static_cast <bool> (Depth < X86::MaxShuffleCombineDepth && "Depth out of range") ? void (0) : __assert_fail ( "Depth < X86::MaxShuffleCombineDepth && \"Depth out of range\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 39888, __extension__ __PRETTY_FUNCTION__)); | |||
39889 | ||||
39890 | SmallVector<int, 64> DemandedMask(NumElts, SM_SentinelUndef); | |||
39891 | for (int i = 0; i != NumElts; ++i) | |||
39892 | if (DemandedElts[i]) | |||
39893 | DemandedMask[i] = i; | |||
39894 | ||||
39895 | SDValue NewShuffle = combineX86ShufflesRecursively( | |||
39896 | {Op}, 0, Op, DemandedMask, {}, 0, X86::MaxShuffleCombineDepth - Depth, | |||
39897 | /*HasVarMask*/ false, | |||
39898 | /*AllowCrossLaneVarMask*/ true, /*AllowPerLaneVarMask*/ true, TLO.DAG, | |||
39899 | Subtarget); | |||
39900 | if (NewShuffle) | |||
39901 | return TLO.CombineTo(Op, NewShuffle); | |||
39902 | } | |||
39903 | ||||
39904 | return false; | |||
39905 | } | |||
39906 | ||||
39907 | bool X86TargetLowering::SimplifyDemandedBitsForTargetNode( | |||
39908 | SDValue Op, const APInt &OriginalDemandedBits, | |||
39909 | const APInt &OriginalDemandedElts, KnownBits &Known, TargetLoweringOpt &TLO, | |||
39910 | unsigned Depth) const { | |||
39911 | EVT VT = Op.getValueType(); | |||
39912 | unsigned BitWidth = OriginalDemandedBits.getBitWidth(); | |||
39913 | unsigned Opc = Op.getOpcode(); | |||
39914 | switch(Opc) { | |||
39915 | case X86ISD::VTRUNC: { | |||
39916 | KnownBits KnownOp; | |||
39917 | SDValue Src = Op.getOperand(0); | |||
39918 | MVT SrcVT = Src.getSimpleValueType(); | |||
39919 | ||||
39920 | // Simplify the input, using demanded bit information. | |||
39921 | APInt TruncMask = OriginalDemandedBits.zext(SrcVT.getScalarSizeInBits()); | |||
39922 | APInt DemandedElts = OriginalDemandedElts.trunc(SrcVT.getVectorNumElements()); | |||
39923 | if (SimplifyDemandedBits(Src, TruncMask, DemandedElts, KnownOp, TLO, Depth + 1)) | |||
39924 | return true; | |||
39925 | break; | |||
39926 | } | |||
39927 | case X86ISD::PMULDQ: | |||
39928 | case X86ISD::PMULUDQ: { | |||
39929 | // PMULDQ/PMULUDQ only uses lower 32 bits from each vector element. | |||
39930 | KnownBits KnownOp; | |||
39931 | SDValue LHS = Op.getOperand(0); | |||
39932 | SDValue RHS = Op.getOperand(1); | |||
39933 | // FIXME: Can we bound this better? | |||
39934 | APInt DemandedMask = APInt::getLowBitsSet(64, 32); | |||
39935 | if (SimplifyDemandedBits(LHS, DemandedMask, OriginalDemandedElts, KnownOp, | |||
39936 | TLO, Depth + 1)) | |||
39937 | return true; | |||
39938 | if (SimplifyDemandedBits(RHS, DemandedMask, OriginalDemandedElts, KnownOp, | |||
39939 | TLO, Depth + 1)) | |||
39940 | return true; | |||
39941 | ||||
39942 | // Aggressively peek through ops to get at the demanded low bits. | |||
39943 | SDValue DemandedLHS = SimplifyMultipleUseDemandedBits( | |||
39944 | LHS, DemandedMask, OriginalDemandedElts, TLO.DAG, Depth + 1); | |||
39945 | SDValue DemandedRHS = SimplifyMultipleUseDemandedBits( | |||
39946 | RHS, DemandedMask, OriginalDemandedElts, TLO.DAG, Depth + 1); | |||
39947 | if (DemandedLHS || DemandedRHS) { | |||
39948 | DemandedLHS = DemandedLHS ? DemandedLHS : LHS; | |||
39949 | DemandedRHS = DemandedRHS ? DemandedRHS : RHS; | |||
39950 | return TLO.CombineTo( | |||
39951 | Op, TLO.DAG.getNode(Opc, SDLoc(Op), VT, DemandedLHS, DemandedRHS)); | |||
39952 | } | |||
39953 | break; | |||
39954 | } | |||
39955 | case X86ISD::VSHLI: { | |||
39956 | SDValue Op0 = Op.getOperand(0); | |||
39957 | ||||
39958 | unsigned ShAmt = Op.getConstantOperandVal(1); | |||
39959 | if (ShAmt >= BitWidth) | |||
39960 | break; | |||
39961 | ||||
39962 | APInt DemandedMask = OriginalDemandedBits.lshr(ShAmt); | |||
39963 | ||||
39964 | // If this is ((X >>u C1) << ShAmt), see if we can simplify this into a | |||
39965 | // single shift. We can do this if the bottom bits (which are shifted | |||
39966 | // out) are never demanded. | |||
39967 | if (Op0.getOpcode() == X86ISD::VSRLI && | |||
39968 | OriginalDemandedBits.countTrailingZeros() >= ShAmt) { | |||
39969 | unsigned Shift2Amt = Op0.getConstantOperandVal(1); | |||
39970 | if (Shift2Amt < BitWidth) { | |||
39971 | int Diff = ShAmt - Shift2Amt; | |||
39972 | if (Diff == 0) | |||
39973 | return TLO.CombineTo(Op, Op0.getOperand(0)); | |||
39974 | ||||
39975 | unsigned NewOpc = Diff < 0 ? X86ISD::VSRLI : X86ISD::VSHLI; | |||
39976 | SDValue NewShift = TLO.DAG.getNode( | |||
39977 | NewOpc, SDLoc(Op), VT, Op0.getOperand(0), | |||
39978 | TLO.DAG.getTargetConstant(std::abs(Diff), SDLoc(Op), MVT::i8)); | |||
39979 | return TLO.CombineTo(Op, NewShift); | |||
39980 | } | |||
39981 | } | |||
39982 | ||||
39983 | // If we are only demanding sign bits then we can use the shift source directly. | |||
39984 | unsigned NumSignBits = | |||
39985 | TLO.DAG.ComputeNumSignBits(Op0, OriginalDemandedElts, Depth + 1); | |||
39986 | unsigned UpperDemandedBits = | |||
39987 | BitWidth - OriginalDemandedBits.countTrailingZeros(); | |||
39988 | if (NumSignBits > ShAmt && (NumSignBits - ShAmt) >= UpperDemandedBits) | |||
39989 | return TLO.CombineTo(Op, Op0); | |||
39990 | ||||
39991 | if (SimplifyDemandedBits(Op0, DemandedMask, OriginalDemandedElts, Known, | |||
39992 | TLO, Depth + 1)) | |||
39993 | return true; | |||
39994 | ||||
39995 | assert(!Known.hasConflict() && "Bits known to be one AND zero?")(static_cast <bool> (!Known.hasConflict() && "Bits known to be one AND zero?" ) ? void (0) : __assert_fail ("!Known.hasConflict() && \"Bits known to be one AND zero?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 39995, __extension__ __PRETTY_FUNCTION__)); | |||
39996 | Known.Zero <<= ShAmt; | |||
39997 | Known.One <<= ShAmt; | |||
39998 | ||||
39999 | // Low bits known zero. | |||
40000 | Known.Zero.setLowBits(ShAmt); | |||
40001 | return false; | |||
40002 | } | |||
40003 | case X86ISD::VSRLI: { | |||
40004 | unsigned ShAmt = Op.getConstantOperandVal(1); | |||
40005 | if (ShAmt >= BitWidth) | |||
40006 | break; | |||
40007 | ||||
40008 | APInt DemandedMask = OriginalDemandedBits << ShAmt; | |||
40009 | ||||
40010 | if (SimplifyDemandedBits(Op.getOperand(0), DemandedMask, | |||
40011 | OriginalDemandedElts, Known, TLO, Depth + 1)) | |||
40012 | return true; | |||
40013 | ||||
40014 | assert(!Known.hasConflict() && "Bits known to be one AND zero?")(static_cast <bool> (!Known.hasConflict() && "Bits known to be one AND zero?" ) ? void (0) : __assert_fail ("!Known.hasConflict() && \"Bits known to be one AND zero?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 40014, __extension__ __PRETTY_FUNCTION__)); | |||
40015 | Known.Zero.lshrInPlace(ShAmt); | |||
40016 | Known.One.lshrInPlace(ShAmt); | |||
40017 | ||||
40018 | // High bits known zero. | |||
40019 | Known.Zero.setHighBits(ShAmt); | |||
40020 | return false; | |||
40021 | } | |||
40022 | case X86ISD::VSRAI: { | |||
40023 | SDValue Op0 = Op.getOperand(0); | |||
40024 | SDValue Op1 = Op.getOperand(1); | |||
40025 | ||||
40026 | unsigned ShAmt = cast<ConstantSDNode>(Op1)->getZExtValue(); | |||
40027 | if (ShAmt >= BitWidth) | |||
40028 | break; | |||
40029 | ||||
40030 | APInt DemandedMask = OriginalDemandedBits << ShAmt; | |||
40031 | ||||
40032 | // If we just want the sign bit then we don't need to shift it. | |||
40033 | if (OriginalDemandedBits.isSignMask()) | |||
40034 | return TLO.CombineTo(Op, Op0); | |||
40035 | ||||
40036 | // fold (VSRAI (VSHLI X, C1), C1) --> X iff NumSignBits(X) > C1 | |||
40037 | if (Op0.getOpcode() == X86ISD::VSHLI && | |||
40038 | Op.getOperand(1) == Op0.getOperand(1)) { | |||
40039 | SDValue Op00 = Op0.getOperand(0); | |||
40040 | unsigned NumSignBits = | |||
40041 | TLO.DAG.ComputeNumSignBits(Op00, OriginalDemandedElts); | |||
40042 | if (ShAmt < NumSignBits) | |||
40043 | return TLO.CombineTo(Op, Op00); | |||
40044 | } | |||
40045 | ||||
40046 | // If any of the demanded bits are produced by the sign extension, we also | |||
40047 | // demand the input sign bit. | |||
40048 | if (OriginalDemandedBits.countLeadingZeros() < ShAmt) | |||
40049 | DemandedMask.setSignBit(); | |||
40050 | ||||
40051 | if (SimplifyDemandedBits(Op0, DemandedMask, OriginalDemandedElts, Known, | |||
40052 | TLO, Depth + 1)) | |||
40053 | return true; | |||
40054 | ||||
40055 | assert(!Known.hasConflict() && "Bits known to be one AND zero?")(static_cast <bool> (!Known.hasConflict() && "Bits known to be one AND zero?" ) ? void (0) : __assert_fail ("!Known.hasConflict() && \"Bits known to be one AND zero?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 40055, __extension__ __PRETTY_FUNCTION__)); | |||
40056 | Known.Zero.lshrInPlace(ShAmt); | |||
40057 | Known.One.lshrInPlace(ShAmt); | |||
40058 | ||||
40059 | // If the input sign bit is known to be zero, or if none of the top bits | |||
40060 | // are demanded, turn this into an unsigned shift right. | |||
40061 | if (Known.Zero[BitWidth - ShAmt - 1] || | |||
40062 | OriginalDemandedBits.countLeadingZeros() >= ShAmt) | |||
40063 | return TLO.CombineTo( | |||
40064 | Op, TLO.DAG.getNode(X86ISD::VSRLI, SDLoc(Op), VT, Op0, Op1)); | |||
40065 | ||||
40066 | // High bits are known one. | |||
40067 | if (Known.One[BitWidth - ShAmt - 1]) | |||
40068 | Known.One.setHighBits(ShAmt); | |||
40069 | return false; | |||
40070 | } | |||
40071 | case X86ISD::PEXTRB: | |||
40072 | case X86ISD::PEXTRW: { | |||
40073 | SDValue Vec = Op.getOperand(0); | |||
40074 | auto *CIdx = dyn_cast<ConstantSDNode>(Op.getOperand(1)); | |||
40075 | MVT VecVT = Vec.getSimpleValueType(); | |||
40076 | unsigned NumVecElts = VecVT.getVectorNumElements(); | |||
40077 | ||||
40078 | if (CIdx && CIdx->getAPIntValue().ult(NumVecElts)) { | |||
40079 | unsigned Idx = CIdx->getZExtValue(); | |||
40080 | unsigned VecBitWidth = VecVT.getScalarSizeInBits(); | |||
40081 | ||||
40082 | // If we demand no bits from the vector then we must have demanded | |||
40083 | // bits from the implict zext - simplify to zero. | |||
40084 | APInt DemandedVecBits = OriginalDemandedBits.trunc(VecBitWidth); | |||
40085 | if (DemandedVecBits == 0) | |||
40086 | return TLO.CombineTo(Op, TLO.DAG.getConstant(0, SDLoc(Op), VT)); | |||
40087 | ||||
40088 | APInt KnownUndef, KnownZero; | |||
40089 | APInt DemandedVecElts = APInt::getOneBitSet(NumVecElts, Idx); | |||
40090 | if (SimplifyDemandedVectorElts(Vec, DemandedVecElts, KnownUndef, | |||
40091 | KnownZero, TLO, Depth + 1)) | |||
40092 | return true; | |||
40093 | ||||
40094 | KnownBits KnownVec; | |||
40095 | if (SimplifyDemandedBits(Vec, DemandedVecBits, DemandedVecElts, | |||
40096 | KnownVec, TLO, Depth + 1)) | |||
40097 | return true; | |||
40098 | ||||
40099 | if (SDValue V = SimplifyMultipleUseDemandedBits( | |||
40100 | Vec, DemandedVecBits, DemandedVecElts, TLO.DAG, Depth + 1)) | |||
40101 | return TLO.CombineTo( | |||
40102 | Op, TLO.DAG.getNode(Opc, SDLoc(Op), VT, V, Op.getOperand(1))); | |||
40103 | ||||
40104 | Known = KnownVec.zext(BitWidth); | |||
40105 | return false; | |||
40106 | } | |||
40107 | break; | |||
40108 | } | |||
40109 | case X86ISD::PINSRB: | |||
40110 | case X86ISD::PINSRW: { | |||
40111 | SDValue Vec = Op.getOperand(0); | |||
40112 | SDValue Scl = Op.getOperand(1); | |||
40113 | auto *CIdx = dyn_cast<ConstantSDNode>(Op.getOperand(2)); | |||
40114 | MVT VecVT = Vec.getSimpleValueType(); | |||
40115 | ||||
40116 | if (CIdx && CIdx->getAPIntValue().ult(VecVT.getVectorNumElements())) { | |||
40117 | unsigned Idx = CIdx->getZExtValue(); | |||
40118 | if (!OriginalDemandedElts[Idx]) | |||
40119 | return TLO.CombineTo(Op, Vec); | |||
40120 | ||||
40121 | KnownBits KnownVec; | |||
40122 | APInt DemandedVecElts(OriginalDemandedElts); | |||
40123 | DemandedVecElts.clearBit(Idx); | |||
40124 | if (SimplifyDemandedBits(Vec, OriginalDemandedBits, DemandedVecElts, | |||
40125 | KnownVec, TLO, Depth + 1)) | |||
40126 | return true; | |||
40127 | ||||
40128 | KnownBits KnownScl; | |||
40129 | unsigned NumSclBits = Scl.getScalarValueSizeInBits(); | |||
40130 | APInt DemandedSclBits = OriginalDemandedBits.zext(NumSclBits); | |||
40131 | if (SimplifyDemandedBits(Scl, DemandedSclBits, KnownScl, TLO, Depth + 1)) | |||
40132 | return true; | |||
40133 | ||||
40134 | KnownScl = KnownScl.trunc(VecVT.getScalarSizeInBits()); | |||
40135 | Known = KnownBits::commonBits(KnownVec, KnownScl); | |||
40136 | return false; | |||
40137 | } | |||
40138 | break; | |||
40139 | } | |||
40140 | case X86ISD::PACKSS: | |||
40141 | // PACKSS saturates to MIN/MAX integer values. So if we just want the | |||
40142 | // sign bit then we can just ask for the source operands sign bit. | |||
40143 | // TODO - add known bits handling. | |||
40144 | if (OriginalDemandedBits.isSignMask()) { | |||
40145 | APInt DemandedLHS, DemandedRHS; | |||
40146 | getPackDemandedElts(VT, OriginalDemandedElts, DemandedLHS, DemandedRHS); | |||
40147 | ||||
40148 | KnownBits KnownLHS, KnownRHS; | |||
40149 | APInt SignMask = APInt::getSignMask(BitWidth * 2); | |||
40150 | if (SimplifyDemandedBits(Op.getOperand(0), SignMask, DemandedLHS, | |||
40151 | KnownLHS, TLO, Depth + 1)) | |||
40152 | return true; | |||
40153 | if (SimplifyDemandedBits(Op.getOperand(1), SignMask, DemandedRHS, | |||
40154 | KnownRHS, TLO, Depth + 1)) | |||
40155 | return true; | |||
40156 | ||||
40157 | // Attempt to avoid multi-use ops if we don't need anything from them. | |||
40158 | SDValue DemandedOp0 = SimplifyMultipleUseDemandedBits( | |||
40159 | Op.getOperand(0), SignMask, DemandedLHS, TLO.DAG, Depth + 1); | |||
40160 | SDValue DemandedOp1 = SimplifyMultipleUseDemandedBits( | |||
40161 | Op.getOperand(1), SignMask, DemandedRHS, TLO.DAG, Depth + 1); | |||
40162 | if (DemandedOp0 || DemandedOp1) { | |||
40163 | SDValue Op0 = DemandedOp0 ? DemandedOp0 : Op.getOperand(0); | |||
40164 | SDValue Op1 = DemandedOp1 ? DemandedOp1 : Op.getOperand(1); | |||
40165 | return TLO.CombineTo(Op, TLO.DAG.getNode(Opc, SDLoc(Op), VT, Op0, Op1)); | |||
40166 | } | |||
40167 | } | |||
40168 | // TODO - add general PACKSS/PACKUS SimplifyDemandedBits support. | |||
40169 | break; | |||
40170 | case X86ISD::VBROADCAST: { | |||
40171 | SDValue Src = Op.getOperand(0); | |||
40172 | MVT SrcVT = Src.getSimpleValueType(); | |||
40173 | APInt DemandedElts = APInt::getOneBitSet( | |||
40174 | SrcVT.isVector() ? SrcVT.getVectorNumElements() : 1, 0); | |||
40175 | if (SimplifyDemandedBits(Src, OriginalDemandedBits, DemandedElts, Known, | |||
40176 | TLO, Depth + 1)) | |||
40177 | return true; | |||
40178 | // If we don't need the upper bits, attempt to narrow the broadcast source. | |||
40179 | // Don't attempt this on AVX512 as it might affect broadcast folding. | |||
40180 | // TODO: Should we attempt this for i32/i16 splats? They tend to be slower. | |||
40181 | if ((BitWidth == 64) && SrcVT.isScalarInteger() && !Subtarget.hasAVX512() && | |||
40182 | OriginalDemandedBits.countLeadingZeros() >= (BitWidth / 2)) { | |||
40183 | MVT NewSrcVT = MVT::getIntegerVT(BitWidth / 2); | |||
40184 | SDValue NewSrc = | |||
40185 | TLO.DAG.getNode(ISD::TRUNCATE, SDLoc(Src), NewSrcVT, Src); | |||
40186 | MVT NewVT = MVT::getVectorVT(NewSrcVT, VT.getVectorNumElements() * 2); | |||
40187 | SDValue NewBcst = | |||
40188 | TLO.DAG.getNode(X86ISD::VBROADCAST, SDLoc(Op), NewVT, NewSrc); | |||
40189 | return TLO.CombineTo(Op, TLO.DAG.getBitcast(VT, NewBcst)); | |||
40190 | } | |||
40191 | break; | |||
40192 | } | |||
40193 | case X86ISD::PCMPGT: | |||
40194 | // icmp sgt(0, R) == ashr(R, BitWidth-1). | |||
40195 | // iff we only need the sign bit then we can use R directly. | |||
40196 | if (OriginalDemandedBits.isSignMask() && | |||
40197 | ISD::isBuildVectorAllZeros(Op.getOperand(0).getNode())) | |||
40198 | return TLO.CombineTo(Op, Op.getOperand(1)); | |||
40199 | break; | |||
40200 | case X86ISD::MOVMSK: { | |||
40201 | SDValue Src = Op.getOperand(0); | |||
40202 | MVT SrcVT = Src.getSimpleValueType(); | |||
40203 | unsigned SrcBits = SrcVT.getScalarSizeInBits(); | |||
40204 | unsigned NumElts = SrcVT.getVectorNumElements(); | |||
40205 | ||||
40206 | // If we don't need the sign bits at all just return zero. | |||
40207 | if (OriginalDemandedBits.countTrailingZeros() >= NumElts) | |||
40208 | return TLO.CombineTo(Op, TLO.DAG.getConstant(0, SDLoc(Op), VT)); | |||
40209 | ||||
40210 | // Only demand the vector elements of the sign bits we need. | |||
40211 | APInt KnownUndef, KnownZero; | |||
40212 | APInt DemandedElts = OriginalDemandedBits.zextOrTrunc(NumElts); | |||
40213 | if (SimplifyDemandedVectorElts(Src, DemandedElts, KnownUndef, KnownZero, | |||
40214 | TLO, Depth + 1)) | |||
40215 | return true; | |||
40216 | ||||
40217 | Known.Zero = KnownZero.zextOrSelf(BitWidth); | |||
40218 | Known.Zero.setHighBits(BitWidth - NumElts); | |||
40219 | ||||
40220 | // MOVMSK only uses the MSB from each vector element. | |||
40221 | KnownBits KnownSrc; | |||
40222 | APInt DemandedSrcBits = APInt::getSignMask(SrcBits); | |||
40223 | if (SimplifyDemandedBits(Src, DemandedSrcBits, DemandedElts, KnownSrc, TLO, | |||
40224 | Depth + 1)) | |||
40225 | return true; | |||
40226 | ||||
40227 | if (KnownSrc.One[SrcBits - 1]) | |||
40228 | Known.One.setLowBits(NumElts); | |||
40229 | else if (KnownSrc.Zero[SrcBits - 1]) | |||
40230 | Known.Zero.setLowBits(NumElts); | |||
40231 | ||||
40232 | // Attempt to avoid multi-use os if we don't need anything from it. | |||
40233 | if (SDValue NewSrc = SimplifyMultipleUseDemandedBits( | |||
40234 | Src, DemandedSrcBits, DemandedElts, TLO.DAG, Depth + 1)) | |||
40235 | return TLO.CombineTo(Op, TLO.DAG.getNode(Opc, SDLoc(Op), VT, NewSrc)); | |||
40236 | return false; | |||
40237 | } | |||
40238 | case X86ISD::BEXTR: | |||
40239 | case X86ISD::BEXTRI: { | |||
40240 | SDValue Op0 = Op.getOperand(0); | |||
40241 | SDValue Op1 = Op.getOperand(1); | |||
40242 | ||||
40243 | // Only bottom 16-bits of the control bits are required. | |||
40244 | if (auto *Cst1 = dyn_cast<ConstantSDNode>(Op1)) { | |||
40245 | // NOTE: SimplifyDemandedBits won't do this for constants. | |||
40246 | uint64_t Val1 = Cst1->getZExtValue(); | |||
40247 | uint64_t MaskedVal1 = Val1 & 0xFFFF; | |||
40248 | if (Opc == X86ISD::BEXTR && MaskedVal1 != Val1) { | |||
40249 | SDLoc DL(Op); | |||
40250 | return TLO.CombineTo( | |||
40251 | Op, TLO.DAG.getNode(X86ISD::BEXTR, DL, VT, Op0, | |||
40252 | TLO.DAG.getConstant(MaskedVal1, DL, VT))); | |||
40253 | } | |||
40254 | ||||
40255 | unsigned Shift = Cst1->getAPIntValue().extractBitsAsZExtValue(8, 0); | |||
40256 | unsigned Length = Cst1->getAPIntValue().extractBitsAsZExtValue(8, 8); | |||
40257 | ||||
40258 | // If the length is 0, the result is 0. | |||
40259 | if (Length == 0) { | |||
40260 | Known.setAllZero(); | |||
40261 | return false; | |||
40262 | } | |||
40263 | ||||
40264 | if ((Shift + Length) <= BitWidth) { | |||
40265 | APInt DemandedMask = APInt::getBitsSet(BitWidth, Shift, Shift + Length); | |||
40266 | if (SimplifyDemandedBits(Op0, DemandedMask, Known, TLO, Depth + 1)) | |||
40267 | return true; | |||
40268 | ||||
40269 | Known = Known.extractBits(Length, Shift); | |||
40270 | Known = Known.zextOrTrunc(BitWidth); | |||
40271 | return false; | |||
40272 | } | |||
40273 | } else { | |||
40274 | assert(Opc == X86ISD::BEXTR && "Unexpected opcode!")(static_cast <bool> (Opc == X86ISD::BEXTR && "Unexpected opcode!" ) ? void (0) : __assert_fail ("Opc == X86ISD::BEXTR && \"Unexpected opcode!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 40274, __extension__ __PRETTY_FUNCTION__)); | |||
40275 | KnownBits Known1; | |||
40276 | APInt DemandedMask(APInt::getLowBitsSet(BitWidth, 16)); | |||
40277 | if (SimplifyDemandedBits(Op1, DemandedMask, Known1, TLO, Depth + 1)) | |||
40278 | return true; | |||
40279 | ||||
40280 | // If the length is 0, replace with 0. | |||
40281 | KnownBits LengthBits = Known1.extractBits(8, 8); | |||
40282 | if (LengthBits.isZero()) | |||
40283 | return TLO.CombineTo(Op, TLO.DAG.getConstant(0, SDLoc(Op), VT)); | |||
40284 | } | |||
40285 | ||||
40286 | break; | |||
40287 | } | |||
40288 | case X86ISD::PDEP: { | |||
40289 | SDValue Op0 = Op.getOperand(0); | |||
40290 | SDValue Op1 = Op.getOperand(1); | |||
40291 | ||||
40292 | unsigned DemandedBitsLZ = OriginalDemandedBits.countLeadingZeros(); | |||
40293 | APInt LoMask = APInt::getLowBitsSet(BitWidth, BitWidth - DemandedBitsLZ); | |||
40294 | ||||
40295 | // If the demanded bits has leading zeroes, we don't demand those from the | |||
40296 | // mask. | |||
40297 | if (SimplifyDemandedBits(Op1, LoMask, Known, TLO, Depth + 1)) | |||
40298 | return true; | |||
40299 | ||||
40300 | // The number of possible 1s in the mask determines the number of LSBs of | |||
40301 | // operand 0 used. Undemanded bits from the mask don't matter so filter | |||
40302 | // them before counting. | |||
40303 | KnownBits Known2; | |||
40304 | uint64_t Count = (~Known.Zero & LoMask).countPopulation(); | |||
40305 | APInt DemandedMask(APInt::getLowBitsSet(BitWidth, Count)); | |||
40306 | if (SimplifyDemandedBits(Op0, DemandedMask, Known2, TLO, Depth + 1)) | |||
40307 | return true; | |||
40308 | ||||
40309 | // Zeroes are retained from the mask, but not ones. | |||
40310 | Known.One.clearAllBits(); | |||
40311 | // The result will have at least as many trailing zeros as the non-mask | |||
40312 | // operand since bits can only map to the same or higher bit position. | |||
40313 | Known.Zero.setLowBits(Known2.countMinTrailingZeros()); | |||
40314 | return false; | |||
40315 | } | |||
40316 | } | |||
40317 | ||||
40318 | return TargetLowering::SimplifyDemandedBitsForTargetNode( | |||
40319 | Op, OriginalDemandedBits, OriginalDemandedElts, Known, TLO, Depth); | |||
40320 | } | |||
40321 | ||||
40322 | SDValue X86TargetLowering::SimplifyMultipleUseDemandedBitsForTargetNode( | |||
40323 | SDValue Op, const APInt &DemandedBits, const APInt &DemandedElts, | |||
40324 | SelectionDAG &DAG, unsigned Depth) const { | |||
40325 | int NumElts = DemandedElts.getBitWidth(); | |||
40326 | unsigned Opc = Op.getOpcode(); | |||
40327 | EVT VT = Op.getValueType(); | |||
40328 | ||||
40329 | switch (Opc) { | |||
40330 | case X86ISD::PINSRB: | |||
40331 | case X86ISD::PINSRW: { | |||
40332 | // If we don't demand the inserted element, return the base vector. | |||
40333 | SDValue Vec = Op.getOperand(0); | |||
40334 | auto *CIdx = dyn_cast<ConstantSDNode>(Op.getOperand(2)); | |||
40335 | MVT VecVT = Vec.getSimpleValueType(); | |||
40336 | if (CIdx && CIdx->getAPIntValue().ult(VecVT.getVectorNumElements()) && | |||
40337 | !DemandedElts[CIdx->getZExtValue()]) | |||
40338 | return Vec; | |||
40339 | break; | |||
40340 | } | |||
40341 | case X86ISD::VSHLI: { | |||
40342 | // If we are only demanding sign bits then we can use the shift source | |||
40343 | // directly. | |||
40344 | SDValue Op0 = Op.getOperand(0); | |||
40345 | unsigned ShAmt = Op.getConstantOperandVal(1); | |||
40346 | unsigned BitWidth = DemandedBits.getBitWidth(); | |||
40347 | unsigned NumSignBits = DAG.ComputeNumSignBits(Op0, DemandedElts, Depth + 1); | |||
40348 | unsigned UpperDemandedBits = BitWidth - DemandedBits.countTrailingZeros(); | |||
40349 | if (NumSignBits > ShAmt && (NumSignBits - ShAmt) >= UpperDemandedBits) | |||
40350 | return Op0; | |||
40351 | break; | |||
40352 | } | |||
40353 | case X86ISD::VSRAI: | |||
40354 | // iff we only need the sign bit then we can use the source directly. | |||
40355 | // TODO: generalize where we only demand extended signbits. | |||
40356 | if (DemandedBits.isSignMask()) | |||
40357 | return Op.getOperand(0); | |||
40358 | break; | |||
40359 | case X86ISD::PCMPGT: | |||
40360 | // icmp sgt(0, R) == ashr(R, BitWidth-1). | |||
40361 | // iff we only need the sign bit then we can use R directly. | |||
40362 | if (DemandedBits.isSignMask() && | |||
40363 | ISD::isBuildVectorAllZeros(Op.getOperand(0).getNode())) | |||
40364 | return Op.getOperand(1); | |||
40365 | break; | |||
40366 | } | |||
40367 | ||||
40368 | APInt ShuffleUndef, ShuffleZero; | |||
40369 | SmallVector<int, 16> ShuffleMask; | |||
40370 | SmallVector<SDValue, 2> ShuffleOps; | |||
40371 | if (getTargetShuffleInputs(Op, DemandedElts, ShuffleOps, ShuffleMask, | |||
40372 | ShuffleUndef, ShuffleZero, DAG, Depth, false)) { | |||
40373 | // If all the demanded elts are from one operand and are inline, | |||
40374 | // then we can use the operand directly. | |||
40375 | int NumOps = ShuffleOps.size(); | |||
40376 | if (ShuffleMask.size() == (unsigned)NumElts && | |||
40377 | llvm::all_of(ShuffleOps, [VT](SDValue V) { | |||
40378 | return VT.getSizeInBits() == V.getValueSizeInBits(); | |||
40379 | })) { | |||
40380 | ||||
40381 | if (DemandedElts.isSubsetOf(ShuffleUndef)) | |||
40382 | return DAG.getUNDEF(VT); | |||
40383 | if (DemandedElts.isSubsetOf(ShuffleUndef | ShuffleZero)) | |||
40384 | return getZeroVector(VT.getSimpleVT(), Subtarget, DAG, SDLoc(Op)); | |||
40385 | ||||
40386 | // Bitmask that indicates which ops have only been accessed 'inline'. | |||
40387 | APInt IdentityOp = APInt::getAllOnesValue(NumOps); | |||
40388 | for (int i = 0; i != NumElts; ++i) { | |||
40389 | int M = ShuffleMask[i]; | |||
40390 | if (!DemandedElts[i] || ShuffleUndef[i]) | |||
40391 | continue; | |||
40392 | int OpIdx = M / NumElts; | |||
40393 | int EltIdx = M % NumElts; | |||
40394 | if (M < 0 || EltIdx != i) { | |||
40395 | IdentityOp.clearAllBits(); | |||
40396 | break; | |||
40397 | } | |||
40398 | IdentityOp &= APInt::getOneBitSet(NumOps, OpIdx); | |||
40399 | if (IdentityOp == 0) | |||
40400 | break; | |||
40401 | } | |||
40402 | assert((IdentityOp == 0 || IdentityOp.countPopulation() == 1) &&(static_cast <bool> ((IdentityOp == 0 || IdentityOp.countPopulation () == 1) && "Multiple identity shuffles detected") ? void (0) : __assert_fail ("(IdentityOp == 0 || IdentityOp.countPopulation() == 1) && \"Multiple identity shuffles detected\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 40403, __extension__ __PRETTY_FUNCTION__)) | |||
40403 | "Multiple identity shuffles detected")(static_cast <bool> ((IdentityOp == 0 || IdentityOp.countPopulation () == 1) && "Multiple identity shuffles detected") ? void (0) : __assert_fail ("(IdentityOp == 0 || IdentityOp.countPopulation() == 1) && \"Multiple identity shuffles detected\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 40403, __extension__ __PRETTY_FUNCTION__)); | |||
40404 | ||||
40405 | if (IdentityOp != 0) | |||
40406 | return DAG.getBitcast(VT, ShuffleOps[IdentityOp.countTrailingZeros()]); | |||
40407 | } | |||
40408 | } | |||
40409 | ||||
40410 | return TargetLowering::SimplifyMultipleUseDemandedBitsForTargetNode( | |||
40411 | Op, DemandedBits, DemandedElts, DAG, Depth); | |||
40412 | } | |||
40413 | ||||
40414 | // Helper to peek through bitops/trunc/setcc to determine size of source vector. | |||
40415 | // Allows combineBitcastvxi1 to determine what size vector generated a <X x i1>. | |||
40416 | static bool checkBitcastSrcVectorSize(SDValue Src, unsigned Size, | |||
40417 | bool AllowTruncate) { | |||
40418 | switch (Src.getOpcode()) { | |||
40419 | case ISD::TRUNCATE: | |||
40420 | if (!AllowTruncate) | |||
40421 | return false; | |||
40422 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
40423 | case ISD::SETCC: | |||
40424 | return Src.getOperand(0).getValueSizeInBits() == Size; | |||
40425 | case ISD::AND: | |||
40426 | case ISD::XOR: | |||
40427 | case ISD::OR: | |||
40428 | return checkBitcastSrcVectorSize(Src.getOperand(0), Size, AllowTruncate) && | |||
40429 | checkBitcastSrcVectorSize(Src.getOperand(1), Size, AllowTruncate); | |||
40430 | } | |||
40431 | return false; | |||
40432 | } | |||
40433 | ||||
40434 | // Helper to flip between AND/OR/XOR opcodes and their X86ISD FP equivalents. | |||
40435 | static unsigned getAltBitOpcode(unsigned Opcode) { | |||
40436 | switch(Opcode) { | |||
40437 | case ISD::AND: return X86ISD::FAND; | |||
40438 | case ISD::OR: return X86ISD::FOR; | |||
40439 | case ISD::XOR: return X86ISD::FXOR; | |||
40440 | case X86ISD::ANDNP: return X86ISD::FANDN; | |||
40441 | } | |||
40442 | llvm_unreachable("Unknown bitwise opcode")::llvm::llvm_unreachable_internal("Unknown bitwise opcode", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 40442); | |||
40443 | } | |||
40444 | ||||
40445 | // Helper to adjust v4i32 MOVMSK expansion to work with SSE1-only targets. | |||
40446 | static SDValue adjustBitcastSrcVectorSSE1(SelectionDAG &DAG, SDValue Src, | |||
40447 | const SDLoc &DL) { | |||
40448 | EVT SrcVT = Src.getValueType(); | |||
40449 | if (SrcVT != MVT::v4i1) | |||
40450 | return SDValue(); | |||
40451 | ||||
40452 | switch (Src.getOpcode()) { | |||
40453 | case ISD::SETCC: | |||
40454 | if (Src.getOperand(0).getValueType() == MVT::v4i32 && | |||
40455 | ISD::isBuildVectorAllZeros(Src.getOperand(1).getNode()) && | |||
40456 | cast<CondCodeSDNode>(Src.getOperand(2))->get() == ISD::SETLT) { | |||
40457 | SDValue Op0 = Src.getOperand(0); | |||
40458 | if (ISD::isNormalLoad(Op0.getNode())) | |||
40459 | return DAG.getBitcast(MVT::v4f32, Op0); | |||
40460 | if (Op0.getOpcode() == ISD::BITCAST && | |||
40461 | Op0.getOperand(0).getValueType() == MVT::v4f32) | |||
40462 | return Op0.getOperand(0); | |||
40463 | } | |||
40464 | break; | |||
40465 | case ISD::AND: | |||
40466 | case ISD::XOR: | |||
40467 | case ISD::OR: { | |||
40468 | SDValue Op0 = adjustBitcastSrcVectorSSE1(DAG, Src.getOperand(0), DL); | |||
40469 | SDValue Op1 = adjustBitcastSrcVectorSSE1(DAG, Src.getOperand(1), DL); | |||
40470 | if (Op0 && Op1) | |||
40471 | return DAG.getNode(getAltBitOpcode(Src.getOpcode()), DL, MVT::v4f32, Op0, | |||
40472 | Op1); | |||
40473 | break; | |||
40474 | } | |||
40475 | } | |||
40476 | return SDValue(); | |||
40477 | } | |||
40478 | ||||
40479 | // Helper to push sign extension of vXi1 SETCC result through bitops. | |||
40480 | static SDValue signExtendBitcastSrcVector(SelectionDAG &DAG, EVT SExtVT, | |||
40481 | SDValue Src, const SDLoc &DL) { | |||
40482 | switch (Src.getOpcode()) { | |||
40483 | case ISD::SETCC: | |||
40484 | case ISD::TRUNCATE: | |||
40485 | return DAG.getNode(ISD::SIGN_EXTEND, DL, SExtVT, Src); | |||
40486 | case ISD::AND: | |||
40487 | case ISD::XOR: | |||
40488 | case ISD::OR: | |||
40489 | return DAG.getNode( | |||
40490 | Src.getOpcode(), DL, SExtVT, | |||
40491 | signExtendBitcastSrcVector(DAG, SExtVT, Src.getOperand(0), DL), | |||
40492 | signExtendBitcastSrcVector(DAG, SExtVT, Src.getOperand(1), DL)); | |||
40493 | } | |||
40494 | llvm_unreachable("Unexpected node type for vXi1 sign extension")::llvm::llvm_unreachable_internal("Unexpected node type for vXi1 sign extension" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 40494); | |||
40495 | } | |||
40496 | ||||
40497 | // Try to match patterns such as | |||
40498 | // (i16 bitcast (v16i1 x)) | |||
40499 | // -> | |||
40500 | // (i16 movmsk (16i8 sext (v16i1 x))) | |||
40501 | // before the illegal vector is scalarized on subtargets that don't have legal | |||
40502 | // vxi1 types. | |||
40503 | static SDValue combineBitcastvxi1(SelectionDAG &DAG, EVT VT, SDValue Src, | |||
40504 | const SDLoc &DL, | |||
40505 | const X86Subtarget &Subtarget) { | |||
40506 | EVT SrcVT = Src.getValueType(); | |||
40507 | if (!SrcVT.isSimple() || SrcVT.getScalarType() != MVT::i1) | |||
40508 | return SDValue(); | |||
40509 | ||||
40510 | // Recognize the IR pattern for the movmsk intrinsic under SSE1 before type | |||
40511 | // legalization destroys the v4i32 type. | |||
40512 | if (Subtarget.hasSSE1() && !Subtarget.hasSSE2()) { | |||
40513 | if (SDValue V = adjustBitcastSrcVectorSSE1(DAG, Src, DL)) { | |||
40514 | V = DAG.getNode(X86ISD::MOVMSK, DL, MVT::i32, | |||
40515 | DAG.getBitcast(MVT::v4f32, V)); | |||
40516 | return DAG.getZExtOrTrunc(V, DL, VT); | |||
40517 | } | |||
40518 | } | |||
40519 | ||||
40520 | // If the input is a truncate from v16i8 or v32i8 go ahead and use a | |||
40521 | // movmskb even with avx512. This will be better than truncating to vXi1 and | |||
40522 | // using a kmov. This can especially help KNL if the input is a v16i8/v32i8 | |||
40523 | // vpcmpeqb/vpcmpgtb. | |||
40524 | bool PreferMovMsk = Src.getOpcode() == ISD::TRUNCATE && Src.hasOneUse() && | |||
40525 | (Src.getOperand(0).getValueType() == MVT::v16i8 || | |||
40526 | Src.getOperand(0).getValueType() == MVT::v32i8 || | |||
40527 | Src.getOperand(0).getValueType() == MVT::v64i8); | |||
40528 | ||||
40529 | // Prefer movmsk for AVX512 for (bitcast (setlt X, 0)) which can be handled | |||
40530 | // directly with vpmovmskb/vmovmskps/vmovmskpd. | |||
40531 | if (Src.getOpcode() == ISD::SETCC && Src.hasOneUse() && | |||
40532 | cast<CondCodeSDNode>(Src.getOperand(2))->get() == ISD::SETLT && | |||
40533 | ISD::isBuildVectorAllZeros(Src.getOperand(1).getNode())) { | |||
40534 | EVT CmpVT = Src.getOperand(0).getValueType(); | |||
40535 | EVT EltVT = CmpVT.getVectorElementType(); | |||
40536 | if (CmpVT.getSizeInBits() <= 256 && | |||
40537 | (EltVT == MVT::i8 || EltVT == MVT::i32 || EltVT == MVT::i64)) | |||
40538 | PreferMovMsk = true; | |||
40539 | } | |||
40540 | ||||
40541 | // With AVX512 vxi1 types are legal and we prefer using k-regs. | |||
40542 | // MOVMSK is supported in SSE2 or later. | |||
40543 | if (!Subtarget.hasSSE2() || (Subtarget.hasAVX512() && !PreferMovMsk)) | |||
40544 | return SDValue(); | |||
40545 | ||||
40546 | // There are MOVMSK flavors for types v16i8, v32i8, v4f32, v8f32, v4f64 and | |||
40547 | // v8f64. So all legal 128-bit and 256-bit vectors are covered except for | |||
40548 | // v8i16 and v16i16. | |||
40549 | // For these two cases, we can shuffle the upper element bytes to a | |||
40550 | // consecutive sequence at the start of the vector and treat the results as | |||
40551 | // v16i8 or v32i8, and for v16i8 this is the preferable solution. However, | |||
40552 | // for v16i16 this is not the case, because the shuffle is expensive, so we | |||
40553 | // avoid sign-extending to this type entirely. | |||
40554 | // For example, t0 := (v8i16 sext(v8i1 x)) needs to be shuffled as: | |||
40555 | // (v16i8 shuffle <0,2,4,6,8,10,12,14,u,u,...,u> (v16i8 bitcast t0), undef) | |||
40556 | MVT SExtVT; | |||
40557 | bool PropagateSExt = false; | |||
40558 | switch (SrcVT.getSimpleVT().SimpleTy) { | |||
40559 | default: | |||
40560 | return SDValue(); | |||
40561 | case MVT::v2i1: | |||
40562 | SExtVT = MVT::v2i64; | |||
40563 | break; | |||
40564 | case MVT::v4i1: | |||
40565 | SExtVT = MVT::v4i32; | |||
40566 | // For cases such as (i4 bitcast (v4i1 setcc v4i64 v1, v2)) | |||
40567 | // sign-extend to a 256-bit operation to avoid truncation. | |||
40568 | if (Subtarget.hasAVX() && | |||
40569 | checkBitcastSrcVectorSize(Src, 256, Subtarget.hasAVX2())) { | |||
40570 | SExtVT = MVT::v4i64; | |||
40571 | PropagateSExt = true; | |||
40572 | } | |||
40573 | break; | |||
40574 | case MVT::v8i1: | |||
40575 | SExtVT = MVT::v8i16; | |||
40576 | // For cases such as (i8 bitcast (v8i1 setcc v8i32 v1, v2)), | |||
40577 | // sign-extend to a 256-bit operation to match the compare. | |||
40578 | // If the setcc operand is 128-bit, prefer sign-extending to 128-bit over | |||
40579 | // 256-bit because the shuffle is cheaper than sign extending the result of | |||
40580 | // the compare. | |||
40581 | if (Subtarget.hasAVX() && (checkBitcastSrcVectorSize(Src, 256, true) || | |||
40582 | checkBitcastSrcVectorSize(Src, 512, true))) { | |||
40583 | SExtVT = MVT::v8i32; | |||
40584 | PropagateSExt = true; | |||
40585 | } | |||
40586 | break; | |||
40587 | case MVT::v16i1: | |||
40588 | SExtVT = MVT::v16i8; | |||
40589 | // For the case (i16 bitcast (v16i1 setcc v16i16 v1, v2)), | |||
40590 | // it is not profitable to sign-extend to 256-bit because this will | |||
40591 | // require an extra cross-lane shuffle which is more expensive than | |||
40592 | // truncating the result of the compare to 128-bits. | |||
40593 | break; | |||
40594 | case MVT::v32i1: | |||
40595 | SExtVT = MVT::v32i8; | |||
40596 | break; | |||
40597 | case MVT::v64i1: | |||
40598 | // If we have AVX512F, but not AVX512BW and the input is truncated from | |||
40599 | // v64i8 checked earlier. Then split the input and make two pmovmskbs. | |||
40600 | if (Subtarget.hasAVX512()) { | |||
40601 | if (Subtarget.hasBWI()) | |||
40602 | return SDValue(); | |||
40603 | SExtVT = MVT::v64i8; | |||
40604 | break; | |||
40605 | } | |||
40606 | // Split if this is a <64 x i8> comparison result. | |||
40607 | if (checkBitcastSrcVectorSize(Src, 512, false)) { | |||
40608 | SExtVT = MVT::v64i8; | |||
40609 | break; | |||
40610 | } | |||
40611 | return SDValue(); | |||
40612 | }; | |||
40613 | ||||
40614 | SDValue V = PropagateSExt ? signExtendBitcastSrcVector(DAG, SExtVT, Src, DL) | |||
40615 | : DAG.getNode(ISD::SIGN_EXTEND, DL, SExtVT, Src); | |||
40616 | ||||
40617 | if (SExtVT == MVT::v16i8 || SExtVT == MVT::v32i8 || SExtVT == MVT::v64i8) { | |||
40618 | V = getPMOVMSKB(DL, V, DAG, Subtarget); | |||
40619 | } else { | |||
40620 | if (SExtVT == MVT::v8i16) | |||
40621 | V = DAG.getNode(X86ISD::PACKSS, DL, MVT::v16i8, V, | |||
40622 | DAG.getUNDEF(MVT::v8i16)); | |||
40623 | V = DAG.getNode(X86ISD::MOVMSK, DL, MVT::i32, V); | |||
40624 | } | |||
40625 | ||||
40626 | EVT IntVT = | |||
40627 | EVT::getIntegerVT(*DAG.getContext(), SrcVT.getVectorNumElements()); | |||
40628 | V = DAG.getZExtOrTrunc(V, DL, IntVT); | |||
40629 | return DAG.getBitcast(VT, V); | |||
40630 | } | |||
40631 | ||||
40632 | // Convert a vXi1 constant build vector to the same width scalar integer. | |||
40633 | static SDValue combinevXi1ConstantToInteger(SDValue Op, SelectionDAG &DAG) { | |||
40634 | EVT SrcVT = Op.getValueType(); | |||
40635 | assert(SrcVT.getVectorElementType() == MVT::i1 &&(static_cast <bool> (SrcVT.getVectorElementType() == MVT ::i1 && "Expected a vXi1 vector") ? void (0) : __assert_fail ("SrcVT.getVectorElementType() == MVT::i1 && \"Expected a vXi1 vector\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 40636, __extension__ __PRETTY_FUNCTION__)) | |||
40636 | "Expected a vXi1 vector")(static_cast <bool> (SrcVT.getVectorElementType() == MVT ::i1 && "Expected a vXi1 vector") ? void (0) : __assert_fail ("SrcVT.getVectorElementType() == MVT::i1 && \"Expected a vXi1 vector\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 40636, __extension__ __PRETTY_FUNCTION__)); | |||
40637 | assert(ISD::isBuildVectorOfConstantSDNodes(Op.getNode()) &&(static_cast <bool> (ISD::isBuildVectorOfConstantSDNodes (Op.getNode()) && "Expected a constant build vector") ? void (0) : __assert_fail ("ISD::isBuildVectorOfConstantSDNodes(Op.getNode()) && \"Expected a constant build vector\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 40638, __extension__ __PRETTY_FUNCTION__)) | |||
40638 | "Expected a constant build vector")(static_cast <bool> (ISD::isBuildVectorOfConstantSDNodes (Op.getNode()) && "Expected a constant build vector") ? void (0) : __assert_fail ("ISD::isBuildVectorOfConstantSDNodes(Op.getNode()) && \"Expected a constant build vector\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 40638, __extension__ __PRETTY_FUNCTION__)); | |||
40639 | ||||
40640 | APInt Imm(SrcVT.getVectorNumElements(), 0); | |||
40641 | for (unsigned Idx = 0, e = Op.getNumOperands(); Idx < e; ++Idx) { | |||
40642 | SDValue In = Op.getOperand(Idx); | |||
40643 | if (!In.isUndef() && (cast<ConstantSDNode>(In)->getZExtValue() & 0x1)) | |||
40644 | Imm.setBit(Idx); | |||
40645 | } | |||
40646 | EVT IntVT = EVT::getIntegerVT(*DAG.getContext(), Imm.getBitWidth()); | |||
40647 | return DAG.getConstant(Imm, SDLoc(Op), IntVT); | |||
40648 | } | |||
40649 | ||||
40650 | static SDValue combineCastedMaskArithmetic(SDNode *N, SelectionDAG &DAG, | |||
40651 | TargetLowering::DAGCombinerInfo &DCI, | |||
40652 | const X86Subtarget &Subtarget) { | |||
40653 | assert(N->getOpcode() == ISD::BITCAST && "Expected a bitcast")(static_cast <bool> (N->getOpcode() == ISD::BITCAST && "Expected a bitcast") ? void (0) : __assert_fail ("N->getOpcode() == ISD::BITCAST && \"Expected a bitcast\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 40653, __extension__ __PRETTY_FUNCTION__)); | |||
40654 | ||||
40655 | if (!DCI.isBeforeLegalizeOps()) | |||
40656 | return SDValue(); | |||
40657 | ||||
40658 | // Only do this if we have k-registers. | |||
40659 | if (!Subtarget.hasAVX512()) | |||
40660 | return SDValue(); | |||
40661 | ||||
40662 | EVT DstVT = N->getValueType(0); | |||
40663 | SDValue Op = N->getOperand(0); | |||
40664 | EVT SrcVT = Op.getValueType(); | |||
40665 | ||||
40666 | if (!Op.hasOneUse()) | |||
40667 | return SDValue(); | |||
40668 | ||||
40669 | // Look for logic ops. | |||
40670 | if (Op.getOpcode() != ISD::AND && | |||
40671 | Op.getOpcode() != ISD::OR && | |||
40672 | Op.getOpcode() != ISD::XOR) | |||
40673 | return SDValue(); | |||
40674 | ||||
40675 | // Make sure we have a bitcast between mask registers and a scalar type. | |||
40676 | if (!(SrcVT.isVector() && SrcVT.getVectorElementType() == MVT::i1 && | |||
40677 | DstVT.isScalarInteger()) && | |||
40678 | !(DstVT.isVector() && DstVT.getVectorElementType() == MVT::i1 && | |||
40679 | SrcVT.isScalarInteger())) | |||
40680 | return SDValue(); | |||
40681 | ||||
40682 | SDValue LHS = Op.getOperand(0); | |||
40683 | SDValue RHS = Op.getOperand(1); | |||
40684 | ||||
40685 | if (LHS.hasOneUse() && LHS.getOpcode() == ISD::BITCAST && | |||
40686 | LHS.getOperand(0).getValueType() == DstVT) | |||
40687 | return DAG.getNode(Op.getOpcode(), SDLoc(N), DstVT, LHS.getOperand(0), | |||
40688 | DAG.getBitcast(DstVT, RHS)); | |||
40689 | ||||
40690 | if (RHS.hasOneUse() && RHS.getOpcode() == ISD::BITCAST && | |||
40691 | RHS.getOperand(0).getValueType() == DstVT) | |||
40692 | return DAG.getNode(Op.getOpcode(), SDLoc(N), DstVT, | |||
40693 | DAG.getBitcast(DstVT, LHS), RHS.getOperand(0)); | |||
40694 | ||||
40695 | // If the RHS is a vXi1 build vector, this is a good reason to flip too. | |||
40696 | // Most of these have to move a constant from the scalar domain anyway. | |||
40697 | if (ISD::isBuildVectorOfConstantSDNodes(RHS.getNode())) { | |||
40698 | RHS = combinevXi1ConstantToInteger(RHS, DAG); | |||
40699 | return DAG.getNode(Op.getOpcode(), SDLoc(N), DstVT, | |||
40700 | DAG.getBitcast(DstVT, LHS), RHS); | |||
40701 | } | |||
40702 | ||||
40703 | return SDValue(); | |||
40704 | } | |||
40705 | ||||
40706 | static SDValue createMMXBuildVector(BuildVectorSDNode *BV, SelectionDAG &DAG, | |||
40707 | const X86Subtarget &Subtarget) { | |||
40708 | SDLoc DL(BV); | |||
40709 | unsigned NumElts = BV->getNumOperands(); | |||
40710 | SDValue Splat = BV->getSplatValue(); | |||
40711 | ||||
40712 | // Build MMX element from integer GPR or SSE float values. | |||
40713 | auto CreateMMXElement = [&](SDValue V) { | |||
40714 | if (V.isUndef()) | |||
40715 | return DAG.getUNDEF(MVT::x86mmx); | |||
40716 | if (V.getValueType().isFloatingPoint()) { | |||
40717 | if (Subtarget.hasSSE1() && !isa<ConstantFPSDNode>(V)) { | |||
40718 | V = DAG.getNode(ISD::SCALAR_TO_VECTOR, DL, MVT::v4f32, V); | |||
40719 | V = DAG.getBitcast(MVT::v2i64, V); | |||
40720 | return DAG.getNode(X86ISD::MOVDQ2Q, DL, MVT::x86mmx, V); | |||
40721 | } | |||
40722 | V = DAG.getBitcast(MVT::i32, V); | |||
40723 | } else { | |||
40724 | V = DAG.getAnyExtOrTrunc(V, DL, MVT::i32); | |||
40725 | } | |||
40726 | return DAG.getNode(X86ISD::MMX_MOVW2D, DL, MVT::x86mmx, V); | |||
40727 | }; | |||
40728 | ||||
40729 | // Convert build vector ops to MMX data in the bottom elements. | |||
40730 | SmallVector<SDValue, 8> Ops; | |||
40731 | ||||
40732 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
40733 | ||||
40734 | // Broadcast - use (PUNPCKL+)PSHUFW to broadcast single element. | |||
40735 | if (Splat) { | |||
40736 | if (Splat.isUndef()) | |||
40737 | return DAG.getUNDEF(MVT::x86mmx); | |||
40738 | ||||
40739 | Splat = CreateMMXElement(Splat); | |||
40740 | ||||
40741 | if (Subtarget.hasSSE1()) { | |||
40742 | // Unpack v8i8 to splat i8 elements to lowest 16-bits. | |||
40743 | if (NumElts == 8) | |||
40744 | Splat = DAG.getNode( | |||
40745 | ISD::INTRINSIC_WO_CHAIN, DL, MVT::x86mmx, | |||
40746 | DAG.getTargetConstant(Intrinsic::x86_mmx_punpcklbw, DL, | |||
40747 | TLI.getPointerTy(DAG.getDataLayout())), | |||
40748 | Splat, Splat); | |||
40749 | ||||
40750 | // Use PSHUFW to repeat 16-bit elements. | |||
40751 | unsigned ShufMask = (NumElts > 2 ? 0 : 0x44); | |||
40752 | return DAG.getNode( | |||
40753 | ISD::INTRINSIC_WO_CHAIN, DL, MVT::x86mmx, | |||
40754 | DAG.getTargetConstant(Intrinsic::x86_sse_pshuf_w, DL, | |||
40755 | TLI.getPointerTy(DAG.getDataLayout())), | |||
40756 | Splat, DAG.getTargetConstant(ShufMask, DL, MVT::i8)); | |||
40757 | } | |||
40758 | Ops.append(NumElts, Splat); | |||
40759 | } else { | |||
40760 | for (unsigned i = 0; i != NumElts; ++i) | |||
40761 | Ops.push_back(CreateMMXElement(BV->getOperand(i))); | |||
40762 | } | |||
40763 | ||||
40764 | // Use tree of PUNPCKLs to build up general MMX vector. | |||
40765 | while (Ops.size() > 1) { | |||
40766 | unsigned NumOps = Ops.size(); | |||
40767 | unsigned IntrinOp = | |||
40768 | (NumOps == 2 ? Intrinsic::x86_mmx_punpckldq | |||
40769 | : (NumOps == 4 ? Intrinsic::x86_mmx_punpcklwd | |||
40770 | : Intrinsic::x86_mmx_punpcklbw)); | |||
40771 | SDValue Intrin = DAG.getTargetConstant( | |||
40772 | IntrinOp, DL, TLI.getPointerTy(DAG.getDataLayout())); | |||
40773 | for (unsigned i = 0; i != NumOps; i += 2) | |||
40774 | Ops[i / 2] = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, MVT::x86mmx, Intrin, | |||
40775 | Ops[i], Ops[i + 1]); | |||
40776 | Ops.resize(NumOps / 2); | |||
40777 | } | |||
40778 | ||||
40779 | return Ops[0]; | |||
40780 | } | |||
40781 | ||||
40782 | // Recursive function that attempts to find if a bool vector node was originally | |||
40783 | // a vector/float/double that got truncated/extended/bitcast to/from a scalar | |||
40784 | // integer. If so, replace the scalar ops with bool vector equivalents back down | |||
40785 | // the chain. | |||
40786 | static SDValue combineBitcastToBoolVector(EVT VT, SDValue V, const SDLoc &DL, | |||
40787 | SelectionDAG &DAG, | |||
40788 | const X86Subtarget &Subtarget) { | |||
40789 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
40790 | unsigned Opc = V.getOpcode(); | |||
40791 | switch (Opc) { | |||
40792 | case ISD::BITCAST: { | |||
40793 | // Bitcast from a vector/float/double, we can cheaply bitcast to VT. | |||
40794 | SDValue Src = V.getOperand(0); | |||
40795 | EVT SrcVT = Src.getValueType(); | |||
40796 | if (SrcVT.isVector() || SrcVT.isFloatingPoint()) | |||
40797 | return DAG.getBitcast(VT, Src); | |||
40798 | break; | |||
40799 | } | |||
40800 | case ISD::TRUNCATE: { | |||
40801 | // If we find a suitable source, a truncated scalar becomes a subvector. | |||
40802 | SDValue Src = V.getOperand(0); | |||
40803 | EVT NewSrcVT = | |||
40804 | EVT::getVectorVT(*DAG.getContext(), MVT::i1, Src.getValueSizeInBits()); | |||
40805 | if (TLI.isTypeLegal(NewSrcVT)) | |||
40806 | if (SDValue N0 = | |||
40807 | combineBitcastToBoolVector(NewSrcVT, Src, DL, DAG, Subtarget)) | |||
40808 | return DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, VT, N0, | |||
40809 | DAG.getIntPtrConstant(0, DL)); | |||
40810 | break; | |||
40811 | } | |||
40812 | case ISD::ANY_EXTEND: | |||
40813 | case ISD::ZERO_EXTEND: { | |||
40814 | // If we find a suitable source, an extended scalar becomes a subvector. | |||
40815 | SDValue Src = V.getOperand(0); | |||
40816 | EVT NewSrcVT = EVT::getVectorVT(*DAG.getContext(), MVT::i1, | |||
40817 | Src.getScalarValueSizeInBits()); | |||
40818 | if (TLI.isTypeLegal(NewSrcVT)) | |||
40819 | if (SDValue N0 = | |||
40820 | combineBitcastToBoolVector(NewSrcVT, Src, DL, DAG, Subtarget)) | |||
40821 | return DAG.getNode(ISD::INSERT_SUBVECTOR, DL, VT, | |||
40822 | Opc == ISD::ANY_EXTEND ? DAG.getUNDEF(VT) | |||
40823 | : DAG.getConstant(0, DL, VT), | |||
40824 | N0, DAG.getIntPtrConstant(0, DL)); | |||
40825 | break; | |||
40826 | } | |||
40827 | case ISD::OR: { | |||
40828 | // If we find suitable sources, we can just move an OR to the vector domain. | |||
40829 | SDValue Src0 = V.getOperand(0); | |||
40830 | SDValue Src1 = V.getOperand(1); | |||
40831 | if (SDValue N0 = combineBitcastToBoolVector(VT, Src0, DL, DAG, Subtarget)) | |||
40832 | if (SDValue N1 = combineBitcastToBoolVector(VT, Src1, DL, DAG, Subtarget)) | |||
40833 | return DAG.getNode(Opc, DL, VT, N0, N1); | |||
40834 | break; | |||
40835 | } | |||
40836 | case ISD::SHL: { | |||
40837 | // If we find a suitable source, a SHL becomes a KSHIFTL. | |||
40838 | SDValue Src0 = V.getOperand(0); | |||
40839 | if ((VT == MVT::v8i1 && !Subtarget.hasDQI()) || | |||
40840 | ((VT == MVT::v32i1 || VT == MVT::v64i1) && !Subtarget.hasBWI())) | |||
40841 | break; | |||
40842 | ||||
40843 | if (auto *Amt = dyn_cast<ConstantSDNode>(V.getOperand(1))) | |||
40844 | if (SDValue N0 = combineBitcastToBoolVector(VT, Src0, DL, DAG, Subtarget)) | |||
40845 | return DAG.getNode( | |||
40846 | X86ISD::KSHIFTL, DL, VT, N0, | |||
40847 | DAG.getTargetConstant(Amt->getZExtValue(), DL, MVT::i8)); | |||
40848 | break; | |||
40849 | } | |||
40850 | } | |||
40851 | return SDValue(); | |||
40852 | } | |||
40853 | ||||
40854 | static SDValue combineBitcast(SDNode *N, SelectionDAG &DAG, | |||
40855 | TargetLowering::DAGCombinerInfo &DCI, | |||
40856 | const X86Subtarget &Subtarget) { | |||
40857 | SDValue N0 = N->getOperand(0); | |||
40858 | EVT VT = N->getValueType(0); | |||
40859 | EVT SrcVT = N0.getValueType(); | |||
40860 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
40861 | ||||
40862 | // Try to match patterns such as | |||
40863 | // (i16 bitcast (v16i1 x)) | |||
40864 | // -> | |||
40865 | // (i16 movmsk (16i8 sext (v16i1 x))) | |||
40866 | // before the setcc result is scalarized on subtargets that don't have legal | |||
40867 | // vxi1 types. | |||
40868 | if (DCI.isBeforeLegalize()) { | |||
40869 | SDLoc dl(N); | |||
40870 | if (SDValue V = combineBitcastvxi1(DAG, VT, N0, dl, Subtarget)) | |||
40871 | return V; | |||
40872 | ||||
40873 | // If this is a bitcast between a MVT::v4i1/v2i1 and an illegal integer | |||
40874 | // type, widen both sides to avoid a trip through memory. | |||
40875 | if ((VT == MVT::v4i1 || VT == MVT::v2i1) && SrcVT.isScalarInteger() && | |||
40876 | Subtarget.hasAVX512()) { | |||
40877 | N0 = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i8, N0); | |||
40878 | N0 = DAG.getBitcast(MVT::v8i1, N0); | |||
40879 | return DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT, N0, | |||
40880 | DAG.getIntPtrConstant(0, dl)); | |||
40881 | } | |||
40882 | ||||
40883 | // If this is a bitcast between a MVT::v4i1/v2i1 and an illegal integer | |||
40884 | // type, widen both sides to avoid a trip through memory. | |||
40885 | if ((SrcVT == MVT::v4i1 || SrcVT == MVT::v2i1) && VT.isScalarInteger() && | |||
40886 | Subtarget.hasAVX512()) { | |||
40887 | // Use zeros for the widening if we already have some zeroes. This can | |||
40888 | // allow SimplifyDemandedBits to remove scalar ANDs that may be down | |||
40889 | // stream of this. | |||
40890 | // FIXME: It might make sense to detect a concat_vectors with a mix of | |||
40891 | // zeroes and undef and turn it into insert_subvector for i1 vectors as | |||
40892 | // a separate combine. What we can't do is canonicalize the operands of | |||
40893 | // such a concat or we'll get into a loop with SimplifyDemandedBits. | |||
40894 | if (N0.getOpcode() == ISD::CONCAT_VECTORS) { | |||
40895 | SDValue LastOp = N0.getOperand(N0.getNumOperands() - 1); | |||
40896 | if (ISD::isBuildVectorAllZeros(LastOp.getNode())) { | |||
40897 | SrcVT = LastOp.getValueType(); | |||
40898 | unsigned NumConcats = 8 / SrcVT.getVectorNumElements(); | |||
40899 | SmallVector<SDValue, 4> Ops(N0->op_begin(), N0->op_end()); | |||
40900 | Ops.resize(NumConcats, DAG.getConstant(0, dl, SrcVT)); | |||
40901 | N0 = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v8i1, Ops); | |||
40902 | N0 = DAG.getBitcast(MVT::i8, N0); | |||
40903 | return DAG.getNode(ISD::TRUNCATE, dl, VT, N0); | |||
40904 | } | |||
40905 | } | |||
40906 | ||||
40907 | unsigned NumConcats = 8 / SrcVT.getVectorNumElements(); | |||
40908 | SmallVector<SDValue, 4> Ops(NumConcats, DAG.getUNDEF(SrcVT)); | |||
40909 | Ops[0] = N0; | |||
40910 | N0 = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v8i1, Ops); | |||
40911 | N0 = DAG.getBitcast(MVT::i8, N0); | |||
40912 | return DAG.getNode(ISD::TRUNCATE, dl, VT, N0); | |||
40913 | } | |||
40914 | } else { | |||
40915 | // If we're bitcasting from iX to vXi1, see if the integer originally | |||
40916 | // began as a vXi1 and whether we can remove the bitcast entirely. | |||
40917 | if (VT.isVector() && VT.getScalarType() == MVT::i1 && | |||
40918 | SrcVT.isScalarInteger() && TLI.isTypeLegal(VT)) { | |||
40919 | if (SDValue V = | |||
40920 | combineBitcastToBoolVector(VT, N0, SDLoc(N), DAG, Subtarget)) | |||
40921 | return V; | |||
40922 | } | |||
40923 | } | |||
40924 | ||||
40925 | // Look for (i8 (bitcast (v8i1 (extract_subvector (v16i1 X), 0)))) and | |||
40926 | // replace with (i8 (trunc (i16 (bitcast (v16i1 X))))). This can occur | |||
40927 | // due to insert_subvector legalization on KNL. By promoting the copy to i16 | |||
40928 | // we can help with known bits propagation from the vXi1 domain to the | |||
40929 | // scalar domain. | |||
40930 | if (VT == MVT::i8 && SrcVT == MVT::v8i1 && Subtarget.hasAVX512() && | |||
40931 | !Subtarget.hasDQI() && N0.getOpcode() == ISD::EXTRACT_SUBVECTOR && | |||
40932 | N0.getOperand(0).getValueType() == MVT::v16i1 && | |||
40933 | isNullConstant(N0.getOperand(1))) | |||
40934 | return DAG.getNode(ISD::TRUNCATE, SDLoc(N), VT, | |||
40935 | DAG.getBitcast(MVT::i16, N0.getOperand(0))); | |||
40936 | ||||
40937 | // Canonicalize (bitcast (vbroadcast_load)) so that the output of the bitcast | |||
40938 | // and the vbroadcast_load are both integer or both fp. In some cases this | |||
40939 | // will remove the bitcast entirely. | |||
40940 | if (N0.getOpcode() == X86ISD::VBROADCAST_LOAD && N0.hasOneUse() && | |||
40941 | VT.isFloatingPoint() != SrcVT.isFloatingPoint() && VT.isVector()) { | |||
40942 | auto *BCast = cast<MemIntrinsicSDNode>(N0); | |||
40943 | unsigned SrcVTSize = SrcVT.getScalarSizeInBits(); | |||
40944 | unsigned MemSize = BCast->getMemoryVT().getScalarSizeInBits(); | |||
40945 | // Don't swap i8/i16 since don't have fp types that size. | |||
40946 | if (MemSize >= 32) { | |||
40947 | MVT MemVT = VT.isFloatingPoint() ? MVT::getFloatingPointVT(MemSize) | |||
40948 | : MVT::getIntegerVT(MemSize); | |||
40949 | MVT LoadVT = VT.isFloatingPoint() ? MVT::getFloatingPointVT(SrcVTSize) | |||
40950 | : MVT::getIntegerVT(SrcVTSize); | |||
40951 | LoadVT = MVT::getVectorVT(LoadVT, SrcVT.getVectorNumElements()); | |||
40952 | ||||
40953 | SDVTList Tys = DAG.getVTList(LoadVT, MVT::Other); | |||
40954 | SDValue Ops[] = { BCast->getChain(), BCast->getBasePtr() }; | |||
40955 | SDValue ResNode = | |||
40956 | DAG.getMemIntrinsicNode(X86ISD::VBROADCAST_LOAD, SDLoc(N), Tys, Ops, | |||
40957 | MemVT, BCast->getMemOperand()); | |||
40958 | DAG.ReplaceAllUsesOfValueWith(SDValue(BCast, 1), ResNode.getValue(1)); | |||
40959 | return DAG.getBitcast(VT, ResNode); | |||
40960 | } | |||
40961 | } | |||
40962 | ||||
40963 | // Since MMX types are special and don't usually play with other vector types, | |||
40964 | // it's better to handle them early to be sure we emit efficient code by | |||
40965 | // avoiding store-load conversions. | |||
40966 | if (VT == MVT::x86mmx) { | |||
40967 | // Detect MMX constant vectors. | |||
40968 | APInt UndefElts; | |||
40969 | SmallVector<APInt, 1> EltBits; | |||
40970 | if (getTargetConstantBitsFromNode(N0, 64, UndefElts, EltBits)) { | |||
40971 | SDLoc DL(N0); | |||
40972 | // Handle zero-extension of i32 with MOVD. | |||
40973 | if (EltBits[0].countLeadingZeros() >= 32) | |||
40974 | return DAG.getNode(X86ISD::MMX_MOVW2D, DL, VT, | |||
40975 | DAG.getConstant(EltBits[0].trunc(32), DL, MVT::i32)); | |||
40976 | // Else, bitcast to a double. | |||
40977 | // TODO - investigate supporting sext 32-bit immediates on x86_64. | |||
40978 | APFloat F64(APFloat::IEEEdouble(), EltBits[0]); | |||
40979 | return DAG.getBitcast(VT, DAG.getConstantFP(F64, DL, MVT::f64)); | |||
40980 | } | |||
40981 | ||||
40982 | // Detect bitcasts to x86mmx low word. | |||
40983 | if (N0.getOpcode() == ISD::BUILD_VECTOR && | |||
40984 | (SrcVT == MVT::v2i32 || SrcVT == MVT::v4i16 || SrcVT == MVT::v8i8) && | |||
40985 | N0.getOperand(0).getValueType() == SrcVT.getScalarType()) { | |||
40986 | bool LowUndef = true, AllUndefOrZero = true; | |||
40987 | for (unsigned i = 1, e = SrcVT.getVectorNumElements(); i != e; ++i) { | |||
40988 | SDValue Op = N0.getOperand(i); | |||
40989 | LowUndef &= Op.isUndef() || (i >= e/2); | |||
40990 | AllUndefOrZero &= (Op.isUndef() || isNullConstant(Op)); | |||
40991 | } | |||
40992 | if (AllUndefOrZero) { | |||
40993 | SDValue N00 = N0.getOperand(0); | |||
40994 | SDLoc dl(N00); | |||
40995 | N00 = LowUndef ? DAG.getAnyExtOrTrunc(N00, dl, MVT::i32) | |||
40996 | : DAG.getZExtOrTrunc(N00, dl, MVT::i32); | |||
40997 | return DAG.getNode(X86ISD::MMX_MOVW2D, dl, VT, N00); | |||
40998 | } | |||
40999 | } | |||
41000 | ||||
41001 | // Detect bitcasts of 64-bit build vectors and convert to a | |||
41002 | // MMX UNPCK/PSHUFW which takes MMX type inputs with the value in the | |||
41003 | // lowest element. | |||
41004 | if (N0.getOpcode() == ISD::BUILD_VECTOR && | |||
41005 | (SrcVT == MVT::v2f32 || SrcVT == MVT::v2i32 || SrcVT == MVT::v4i16 || | |||
41006 | SrcVT == MVT::v8i8)) | |||
41007 | return createMMXBuildVector(cast<BuildVectorSDNode>(N0), DAG, Subtarget); | |||
41008 | ||||
41009 | // Detect bitcasts between element or subvector extraction to x86mmx. | |||
41010 | if ((N0.getOpcode() == ISD::EXTRACT_VECTOR_ELT || | |||
41011 | N0.getOpcode() == ISD::EXTRACT_SUBVECTOR) && | |||
41012 | isNullConstant(N0.getOperand(1))) { | |||
41013 | SDValue N00 = N0.getOperand(0); | |||
41014 | if (N00.getValueType().is128BitVector()) | |||
41015 | return DAG.getNode(X86ISD::MOVDQ2Q, SDLoc(N00), VT, | |||
41016 | DAG.getBitcast(MVT::v2i64, N00)); | |||
41017 | } | |||
41018 | ||||
41019 | // Detect bitcasts from FP_TO_SINT to x86mmx. | |||
41020 | if (SrcVT == MVT::v2i32 && N0.getOpcode() == ISD::FP_TO_SINT) { | |||
41021 | SDLoc DL(N0); | |||
41022 | SDValue Res = DAG.getNode(ISD::CONCAT_VECTORS, DL, MVT::v4i32, N0, | |||
41023 | DAG.getUNDEF(MVT::v2i32)); | |||
41024 | return DAG.getNode(X86ISD::MOVDQ2Q, DL, VT, | |||
41025 | DAG.getBitcast(MVT::v2i64, Res)); | |||
41026 | } | |||
41027 | } | |||
41028 | ||||
41029 | // Try to remove a bitcast of constant vXi1 vector. We have to legalize | |||
41030 | // most of these to scalar anyway. | |||
41031 | if (Subtarget.hasAVX512() && VT.isScalarInteger() && | |||
41032 | SrcVT.isVector() && SrcVT.getVectorElementType() == MVT::i1 && | |||
41033 | ISD::isBuildVectorOfConstantSDNodes(N0.getNode())) { | |||
41034 | return combinevXi1ConstantToInteger(N0, DAG); | |||
41035 | } | |||
41036 | ||||
41037 | if (Subtarget.hasAVX512() && SrcVT.isScalarInteger() && | |||
41038 | VT.isVector() && VT.getVectorElementType() == MVT::i1 && | |||
41039 | isa<ConstantSDNode>(N0)) { | |||
41040 | auto *C = cast<ConstantSDNode>(N0); | |||
41041 | if (C->isAllOnesValue()) | |||
41042 | return DAG.getConstant(1, SDLoc(N0), VT); | |||
41043 | if (C->isNullValue()) | |||
41044 | return DAG.getConstant(0, SDLoc(N0), VT); | |||
41045 | } | |||
41046 | ||||
41047 | // Look for MOVMSK that is maybe truncated and then bitcasted to vXi1. | |||
41048 | // Turn it into a sign bit compare that produces a k-register. This avoids | |||
41049 | // a trip through a GPR. | |||
41050 | if (Subtarget.hasAVX512() && SrcVT.isScalarInteger() && | |||
41051 | VT.isVector() && VT.getVectorElementType() == MVT::i1 && | |||
41052 | isPowerOf2_32(VT.getVectorNumElements())) { | |||
41053 | unsigned NumElts = VT.getVectorNumElements(); | |||
41054 | SDValue Src = N0; | |||
41055 | ||||
41056 | // Peek through truncate. | |||
41057 | if (N0.getOpcode() == ISD::TRUNCATE && N0.hasOneUse()) | |||
41058 | Src = N0.getOperand(0); | |||
41059 | ||||
41060 | if (Src.getOpcode() == X86ISD::MOVMSK && Src.hasOneUse()) { | |||
41061 | SDValue MovmskIn = Src.getOperand(0); | |||
41062 | MVT MovmskVT = MovmskIn.getSimpleValueType(); | |||
41063 | unsigned MovMskElts = MovmskVT.getVectorNumElements(); | |||
41064 | ||||
41065 | // We allow extra bits of the movmsk to be used since they are known zero. | |||
41066 | // We can't convert a VPMOVMSKB without avx512bw. | |||
41067 | if (MovMskElts <= NumElts && | |||
41068 | (Subtarget.hasBWI() || MovmskVT.getVectorElementType() != MVT::i8)) { | |||
41069 | EVT IntVT = EVT(MovmskVT).changeVectorElementTypeToInteger(); | |||
41070 | MovmskIn = DAG.getBitcast(IntVT, MovmskIn); | |||
41071 | SDLoc dl(N); | |||
41072 | MVT CmpVT = MVT::getVectorVT(MVT::i1, MovMskElts); | |||
41073 | SDValue Cmp = DAG.getSetCC(dl, CmpVT, MovmskIn, | |||
41074 | DAG.getConstant(0, dl, IntVT), ISD::SETLT); | |||
41075 | if (EVT(CmpVT) == VT) | |||
41076 | return Cmp; | |||
41077 | ||||
41078 | // Pad with zeroes up to original VT to replace the zeroes that were | |||
41079 | // being used from the MOVMSK. | |||
41080 | unsigned NumConcats = NumElts / MovMskElts; | |||
41081 | SmallVector<SDValue, 4> Ops(NumConcats, DAG.getConstant(0, dl, CmpVT)); | |||
41082 | Ops[0] = Cmp; | |||
41083 | return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, Ops); | |||
41084 | } | |||
41085 | } | |||
41086 | } | |||
41087 | ||||
41088 | // Try to remove bitcasts from input and output of mask arithmetic to | |||
41089 | // remove GPR<->K-register crossings. | |||
41090 | if (SDValue V = combineCastedMaskArithmetic(N, DAG, DCI, Subtarget)) | |||
41091 | return V; | |||
41092 | ||||
41093 | // Convert a bitcasted integer logic operation that has one bitcasted | |||
41094 | // floating-point operand into a floating-point logic operation. This may | |||
41095 | // create a load of a constant, but that is cheaper than materializing the | |||
41096 | // constant in an integer register and transferring it to an SSE register or | |||
41097 | // transferring the SSE operand to integer register and back. | |||
41098 | unsigned FPOpcode; | |||
41099 | switch (N0.getOpcode()) { | |||
41100 | case ISD::AND: FPOpcode = X86ISD::FAND; break; | |||
41101 | case ISD::OR: FPOpcode = X86ISD::FOR; break; | |||
41102 | case ISD::XOR: FPOpcode = X86ISD::FXOR; break; | |||
41103 | default: return SDValue(); | |||
41104 | } | |||
41105 | ||||
41106 | // Check if we have a bitcast from another integer type as well. | |||
41107 | if (!((Subtarget.hasSSE1() && VT == MVT::f32) || | |||
41108 | (Subtarget.hasSSE2() && VT == MVT::f64) || | |||
41109 | (Subtarget.hasFP16() && VT == MVT::f16) || | |||
41110 | (Subtarget.hasSSE2() && VT.isInteger() && VT.isVector() && | |||
41111 | TLI.isTypeLegal(VT)))) | |||
41112 | return SDValue(); | |||
41113 | ||||
41114 | SDValue LogicOp0 = N0.getOperand(0); | |||
41115 | SDValue LogicOp1 = N0.getOperand(1); | |||
41116 | SDLoc DL0(N0); | |||
41117 | ||||
41118 | // bitcast(logic(bitcast(X), Y)) --> logic'(X, bitcast(Y)) | |||
41119 | if (N0.hasOneUse() && LogicOp0.getOpcode() == ISD::BITCAST && | |||
41120 | LogicOp0.hasOneUse() && LogicOp0.getOperand(0).hasOneUse() && | |||
41121 | LogicOp0.getOperand(0).getValueType() == VT && | |||
41122 | !isa<ConstantSDNode>(LogicOp0.getOperand(0))) { | |||
41123 | SDValue CastedOp1 = DAG.getBitcast(VT, LogicOp1); | |||
41124 | unsigned Opcode = VT.isFloatingPoint() ? FPOpcode : N0.getOpcode(); | |||
41125 | return DAG.getNode(Opcode, DL0, VT, LogicOp0.getOperand(0), CastedOp1); | |||
41126 | } | |||
41127 | // bitcast(logic(X, bitcast(Y))) --> logic'(bitcast(X), Y) | |||
41128 | if (N0.hasOneUse() && LogicOp1.getOpcode() == ISD::BITCAST && | |||
41129 | LogicOp1.hasOneUse() && LogicOp1.getOperand(0).hasOneUse() && | |||
41130 | LogicOp1.getOperand(0).getValueType() == VT && | |||
41131 | !isa<ConstantSDNode>(LogicOp1.getOperand(0))) { | |||
41132 | SDValue CastedOp0 = DAG.getBitcast(VT, LogicOp0); | |||
41133 | unsigned Opcode = VT.isFloatingPoint() ? FPOpcode : N0.getOpcode(); | |||
41134 | return DAG.getNode(Opcode, DL0, VT, LogicOp1.getOperand(0), CastedOp0); | |||
41135 | } | |||
41136 | ||||
41137 | return SDValue(); | |||
41138 | } | |||
41139 | ||||
41140 | // Given a ABS node, detect the following pattern: | |||
41141 | // (ABS (SUB (ZERO_EXTEND a), (ZERO_EXTEND b))). | |||
41142 | // This is useful as it is the input into a SAD pattern. | |||
41143 | static bool detectZextAbsDiff(const SDValue &Abs, SDValue &Op0, SDValue &Op1) { | |||
41144 | SDValue AbsOp1 = Abs->getOperand(0); | |||
41145 | if (AbsOp1.getOpcode() != ISD::SUB) | |||
41146 | return false; | |||
41147 | ||||
41148 | Op0 = AbsOp1.getOperand(0); | |||
41149 | Op1 = AbsOp1.getOperand(1); | |||
41150 | ||||
41151 | // Check if the operands of the sub are zero-extended from vectors of i8. | |||
41152 | if (Op0.getOpcode() != ISD::ZERO_EXTEND || | |||
41153 | Op0.getOperand(0).getValueType().getVectorElementType() != MVT::i8 || | |||
41154 | Op1.getOpcode() != ISD::ZERO_EXTEND || | |||
41155 | Op1.getOperand(0).getValueType().getVectorElementType() != MVT::i8) | |||
41156 | return false; | |||
41157 | ||||
41158 | return true; | |||
41159 | } | |||
41160 | ||||
41161 | // Given two zexts of <k x i8> to <k x i32>, create a PSADBW of the inputs | |||
41162 | // to these zexts. | |||
41163 | static SDValue createPSADBW(SelectionDAG &DAG, const SDValue &Zext0, | |||
41164 | const SDValue &Zext1, const SDLoc &DL, | |||
41165 | const X86Subtarget &Subtarget) { | |||
41166 | // Find the appropriate width for the PSADBW. | |||
41167 | EVT InVT = Zext0.getOperand(0).getValueType(); | |||
41168 | unsigned RegSize = std::max(128u, (unsigned)InVT.getSizeInBits()); | |||
41169 | ||||
41170 | // "Zero-extend" the i8 vectors. This is not a per-element zext, rather we | |||
41171 | // fill in the missing vector elements with 0. | |||
41172 | unsigned NumConcat = RegSize / InVT.getSizeInBits(); | |||
41173 | SmallVector<SDValue, 16> Ops(NumConcat, DAG.getConstant(0, DL, InVT)); | |||
41174 | Ops[0] = Zext0.getOperand(0); | |||
41175 | MVT ExtendedVT = MVT::getVectorVT(MVT::i8, RegSize / 8); | |||
41176 | SDValue SadOp0 = DAG.getNode(ISD::CONCAT_VECTORS, DL, ExtendedVT, Ops); | |||
41177 | Ops[0] = Zext1.getOperand(0); | |||
41178 | SDValue SadOp1 = DAG.getNode(ISD::CONCAT_VECTORS, DL, ExtendedVT, Ops); | |||
41179 | ||||
41180 | // Actually build the SAD, split as 128/256/512 bits for SSE/AVX2/AVX512BW. | |||
41181 | auto PSADBWBuilder = [](SelectionDAG &DAG, const SDLoc &DL, | |||
41182 | ArrayRef<SDValue> Ops) { | |||
41183 | MVT VT = MVT::getVectorVT(MVT::i64, Ops[0].getValueSizeInBits() / 64); | |||
41184 | return DAG.getNode(X86ISD::PSADBW, DL, VT, Ops); | |||
41185 | }; | |||
41186 | MVT SadVT = MVT::getVectorVT(MVT::i64, RegSize / 64); | |||
41187 | return SplitOpsAndApply(DAG, Subtarget, DL, SadVT, { SadOp0, SadOp1 }, | |||
41188 | PSADBWBuilder); | |||
41189 | } | |||
41190 | ||||
41191 | // Attempt to replace an min/max v8i16/v16i8 horizontal reduction with | |||
41192 | // PHMINPOSUW. | |||
41193 | static SDValue combineMinMaxReduction(SDNode *Extract, SelectionDAG &DAG, | |||
41194 | const X86Subtarget &Subtarget) { | |||
41195 | // Bail without SSE41. | |||
41196 | if (!Subtarget.hasSSE41()) | |||
41197 | return SDValue(); | |||
41198 | ||||
41199 | EVT ExtractVT = Extract->getValueType(0); | |||
41200 | if (ExtractVT != MVT::i16 && ExtractVT != MVT::i8) | |||
41201 | return SDValue(); | |||
41202 | ||||
41203 | // Check for SMAX/SMIN/UMAX/UMIN horizontal reduction patterns. | |||
41204 | ISD::NodeType BinOp; | |||
41205 | SDValue Src = DAG.matchBinOpReduction( | |||
41206 | Extract, BinOp, {ISD::SMAX, ISD::SMIN, ISD::UMAX, ISD::UMIN}, true); | |||
41207 | if (!Src) | |||
41208 | return SDValue(); | |||
41209 | ||||
41210 | EVT SrcVT = Src.getValueType(); | |||
41211 | EVT SrcSVT = SrcVT.getScalarType(); | |||
41212 | if (SrcSVT != ExtractVT || (SrcVT.getSizeInBits() % 128) != 0) | |||
41213 | return SDValue(); | |||
41214 | ||||
41215 | SDLoc DL(Extract); | |||
41216 | SDValue MinPos = Src; | |||
41217 | ||||
41218 | // First, reduce the source down to 128-bit, applying BinOp to lo/hi. | |||
41219 | while (SrcVT.getSizeInBits() > 128) { | |||
41220 | SDValue Lo, Hi; | |||
41221 | std::tie(Lo, Hi) = splitVector(MinPos, DAG, DL); | |||
41222 | SrcVT = Lo.getValueType(); | |||
41223 | MinPos = DAG.getNode(BinOp, DL, SrcVT, Lo, Hi); | |||
41224 | } | |||
41225 | assert(((SrcVT == MVT::v8i16 && ExtractVT == MVT::i16) ||(static_cast <bool> (((SrcVT == MVT::v8i16 && ExtractVT == MVT::i16) || (SrcVT == MVT::v16i8 && ExtractVT == MVT::i8)) && "Unexpected value type") ? void (0) : __assert_fail ("((SrcVT == MVT::v8i16 && ExtractVT == MVT::i16) || (SrcVT == MVT::v16i8 && ExtractVT == MVT::i8)) && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 41227, __extension__ __PRETTY_FUNCTION__)) | |||
41226 | (SrcVT == MVT::v16i8 && ExtractVT == MVT::i8)) &&(static_cast <bool> (((SrcVT == MVT::v8i16 && ExtractVT == MVT::i16) || (SrcVT == MVT::v16i8 && ExtractVT == MVT::i8)) && "Unexpected value type") ? void (0) : __assert_fail ("((SrcVT == MVT::v8i16 && ExtractVT == MVT::i16) || (SrcVT == MVT::v16i8 && ExtractVT == MVT::i8)) && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 41227, __extension__ __PRETTY_FUNCTION__)) | |||
41227 | "Unexpected value type")(static_cast <bool> (((SrcVT == MVT::v8i16 && ExtractVT == MVT::i16) || (SrcVT == MVT::v16i8 && ExtractVT == MVT::i8)) && "Unexpected value type") ? void (0) : __assert_fail ("((SrcVT == MVT::v8i16 && ExtractVT == MVT::i16) || (SrcVT == MVT::v16i8 && ExtractVT == MVT::i8)) && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 41227, __extension__ __PRETTY_FUNCTION__)); | |||
41228 | ||||
41229 | // PHMINPOSUW applies to UMIN(v8i16), for SMIN/SMAX/UMAX we must apply a mask | |||
41230 | // to flip the value accordingly. | |||
41231 | SDValue Mask; | |||
41232 | unsigned MaskEltsBits = ExtractVT.getSizeInBits(); | |||
41233 | if (BinOp == ISD::SMAX) | |||
41234 | Mask = DAG.getConstant(APInt::getSignedMaxValue(MaskEltsBits), DL, SrcVT); | |||
41235 | else if (BinOp == ISD::SMIN) | |||
41236 | Mask = DAG.getConstant(APInt::getSignedMinValue(MaskEltsBits), DL, SrcVT); | |||
41237 | else if (BinOp == ISD::UMAX) | |||
41238 | Mask = DAG.getConstant(APInt::getAllOnesValue(MaskEltsBits), DL, SrcVT); | |||
41239 | ||||
41240 | if (Mask) | |||
41241 | MinPos = DAG.getNode(ISD::XOR, DL, SrcVT, Mask, MinPos); | |||
41242 | ||||
41243 | // For v16i8 cases we need to perform UMIN on pairs of byte elements, | |||
41244 | // shuffling each upper element down and insert zeros. This means that the | |||
41245 | // v16i8 UMIN will leave the upper element as zero, performing zero-extension | |||
41246 | // ready for the PHMINPOS. | |||
41247 | if (ExtractVT == MVT::i8) { | |||
41248 | SDValue Upper = DAG.getVectorShuffle( | |||
41249 | SrcVT, DL, MinPos, DAG.getConstant(0, DL, MVT::v16i8), | |||
41250 | {1, 16, 3, 16, 5, 16, 7, 16, 9, 16, 11, 16, 13, 16, 15, 16}); | |||
41251 | MinPos = DAG.getNode(ISD::UMIN, DL, SrcVT, MinPos, Upper); | |||
41252 | } | |||
41253 | ||||
41254 | // Perform the PHMINPOS on a v8i16 vector, | |||
41255 | MinPos = DAG.getBitcast(MVT::v8i16, MinPos); | |||
41256 | MinPos = DAG.getNode(X86ISD::PHMINPOS, DL, MVT::v8i16, MinPos); | |||
41257 | MinPos = DAG.getBitcast(SrcVT, MinPos); | |||
41258 | ||||
41259 | if (Mask) | |||
41260 | MinPos = DAG.getNode(ISD::XOR, DL, SrcVT, Mask, MinPos); | |||
41261 | ||||
41262 | return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, ExtractVT, MinPos, | |||
41263 | DAG.getIntPtrConstant(0, DL)); | |||
41264 | } | |||
41265 | ||||
41266 | // Attempt to replace an all_of/any_of/parity style horizontal reduction with a MOVMSK. | |||
41267 | static SDValue combinePredicateReduction(SDNode *Extract, SelectionDAG &DAG, | |||
41268 | const X86Subtarget &Subtarget) { | |||
41269 | // Bail without SSE2. | |||
41270 | if (!Subtarget.hasSSE2()) | |||
41271 | return SDValue(); | |||
41272 | ||||
41273 | EVT ExtractVT = Extract->getValueType(0); | |||
41274 | unsigned BitWidth = ExtractVT.getSizeInBits(); | |||
41275 | if (ExtractVT != MVT::i64 && ExtractVT != MVT::i32 && ExtractVT != MVT::i16 && | |||
41276 | ExtractVT != MVT::i8 && ExtractVT != MVT::i1) | |||
41277 | return SDValue(); | |||
41278 | ||||
41279 | // Check for OR(any_of)/AND(all_of)/XOR(parity) horizontal reduction patterns. | |||
41280 | ISD::NodeType BinOp; | |||
41281 | SDValue Match = DAG.matchBinOpReduction(Extract, BinOp, {ISD::OR, ISD::AND}); | |||
41282 | if (!Match && ExtractVT == MVT::i1) | |||
41283 | Match = DAG.matchBinOpReduction(Extract, BinOp, {ISD::XOR}); | |||
41284 | if (!Match) | |||
41285 | return SDValue(); | |||
41286 | ||||
41287 | // EXTRACT_VECTOR_ELT can require implicit extension of the vector element | |||
41288 | // which we can't support here for now. | |||
41289 | if (Match.getScalarValueSizeInBits() != BitWidth) | |||
41290 | return SDValue(); | |||
41291 | ||||
41292 | SDValue Movmsk; | |||
41293 | SDLoc DL(Extract); | |||
41294 | EVT MatchVT = Match.getValueType(); | |||
41295 | unsigned NumElts = MatchVT.getVectorNumElements(); | |||
41296 | unsigned MaxElts = Subtarget.hasInt256() ? 32 : 16; | |||
41297 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
41298 | ||||
41299 | if (ExtractVT == MVT::i1) { | |||
41300 | // Special case for (pre-legalization) vXi1 reductions. | |||
41301 | if (NumElts > 64 || !isPowerOf2_32(NumElts)) | |||
41302 | return SDValue(); | |||
41303 | if (TLI.isTypeLegal(MatchVT)) { | |||
41304 | // If this is a legal AVX512 predicate type then we can just bitcast. | |||
41305 | EVT MovmskVT = EVT::getIntegerVT(*DAG.getContext(), NumElts); | |||
41306 | Movmsk = DAG.getBitcast(MovmskVT, Match); | |||
41307 | } else { | |||
41308 | // For all_of(setcc(vec,0,eq)) - avoid vXi64 comparisons if we don't have | |||
41309 | // PCMPEQQ (SSE41+), use PCMPEQD instead. | |||
41310 | if (BinOp == ISD::AND && !Subtarget.hasSSE41() && | |||
41311 | Match.getOpcode() == ISD::SETCC && | |||
41312 | ISD::isBuildVectorAllZeros(Match.getOperand(1).getNode()) && | |||
41313 | cast<CondCodeSDNode>(Match.getOperand(2))->get() == | |||
41314 | ISD::CondCode::SETEQ) { | |||
41315 | SDValue Vec = Match.getOperand(0); | |||
41316 | if (Vec.getValueType().getScalarType() == MVT::i64 && | |||
41317 | (2 * NumElts) <= MaxElts) { | |||
41318 | NumElts *= 2; | |||
41319 | EVT CmpVT = EVT::getVectorVT(*DAG.getContext(), MVT::i32, NumElts); | |||
41320 | MatchVT = EVT::getVectorVT(*DAG.getContext(), MVT::i1, NumElts); | |||
41321 | Match = DAG.getSetCC( | |||
41322 | DL, MatchVT, DAG.getBitcast(CmpVT, Match.getOperand(0)), | |||
41323 | DAG.getBitcast(CmpVT, Match.getOperand(1)), ISD::CondCode::SETEQ); | |||
41324 | } | |||
41325 | } | |||
41326 | ||||
41327 | // Use combineBitcastvxi1 to create the MOVMSK. | |||
41328 | while (NumElts > MaxElts) { | |||
41329 | SDValue Lo, Hi; | |||
41330 | std::tie(Lo, Hi) = DAG.SplitVector(Match, DL); | |||
41331 | Match = DAG.getNode(BinOp, DL, Lo.getValueType(), Lo, Hi); | |||
41332 | NumElts /= 2; | |||
41333 | } | |||
41334 | EVT MovmskVT = EVT::getIntegerVT(*DAG.getContext(), NumElts); | |||
41335 | Movmsk = combineBitcastvxi1(DAG, MovmskVT, Match, DL, Subtarget); | |||
41336 | } | |||
41337 | if (!Movmsk) | |||
41338 | return SDValue(); | |||
41339 | Movmsk = DAG.getZExtOrTrunc(Movmsk, DL, NumElts > 32 ? MVT::i64 : MVT::i32); | |||
41340 | } else { | |||
41341 | // FIXME: Better handling of k-registers or 512-bit vectors? | |||
41342 | unsigned MatchSizeInBits = Match.getValueSizeInBits(); | |||
41343 | if (!(MatchSizeInBits == 128 || | |||
41344 | (MatchSizeInBits == 256 && Subtarget.hasAVX()))) | |||
41345 | return SDValue(); | |||
41346 | ||||
41347 | // Make sure this isn't a vector of 1 element. The perf win from using | |||
41348 | // MOVMSK diminishes with less elements in the reduction, but it is | |||
41349 | // generally better to get the comparison over to the GPRs as soon as | |||
41350 | // possible to reduce the number of vector ops. | |||
41351 | if (Match.getValueType().getVectorNumElements() < 2) | |||
41352 | return SDValue(); | |||
41353 | ||||
41354 | // Check that we are extracting a reduction of all sign bits. | |||
41355 | if (DAG.ComputeNumSignBits(Match) != BitWidth) | |||
41356 | return SDValue(); | |||
41357 | ||||
41358 | if (MatchSizeInBits == 256 && BitWidth < 32 && !Subtarget.hasInt256()) { | |||
41359 | SDValue Lo, Hi; | |||
41360 | std::tie(Lo, Hi) = DAG.SplitVector(Match, DL); | |||
41361 | Match = DAG.getNode(BinOp, DL, Lo.getValueType(), Lo, Hi); | |||
41362 | MatchSizeInBits = Match.getValueSizeInBits(); | |||
41363 | } | |||
41364 | ||||
41365 | // For 32/64 bit comparisons use MOVMSKPS/MOVMSKPD, else PMOVMSKB. | |||
41366 | MVT MaskSrcVT; | |||
41367 | if (64 == BitWidth || 32 == BitWidth) | |||
41368 | MaskSrcVT = MVT::getVectorVT(MVT::getFloatingPointVT(BitWidth), | |||
41369 | MatchSizeInBits / BitWidth); | |||
41370 | else | |||
41371 | MaskSrcVT = MVT::getVectorVT(MVT::i8, MatchSizeInBits / 8); | |||
41372 | ||||
41373 | SDValue BitcastLogicOp = DAG.getBitcast(MaskSrcVT, Match); | |||
41374 | Movmsk = getPMOVMSKB(DL, BitcastLogicOp, DAG, Subtarget); | |||
41375 | NumElts = MaskSrcVT.getVectorNumElements(); | |||
41376 | } | |||
41377 | assert((NumElts <= 32 || NumElts == 64) &&(static_cast <bool> ((NumElts <= 32 || NumElts == 64 ) && "Not expecting more than 64 elements") ? void (0 ) : __assert_fail ("(NumElts <= 32 || NumElts == 64) && \"Not expecting more than 64 elements\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 41378, __extension__ __PRETTY_FUNCTION__)) | |||
41378 | "Not expecting more than 64 elements")(static_cast <bool> ((NumElts <= 32 || NumElts == 64 ) && "Not expecting more than 64 elements") ? void (0 ) : __assert_fail ("(NumElts <= 32 || NumElts == 64) && \"Not expecting more than 64 elements\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 41378, __extension__ __PRETTY_FUNCTION__)); | |||
41379 | ||||
41380 | MVT CmpVT = NumElts == 64 ? MVT::i64 : MVT::i32; | |||
41381 | if (BinOp == ISD::XOR) { | |||
41382 | // parity -> (PARITY(MOVMSK X)) | |||
41383 | SDValue Result = DAG.getNode(ISD::PARITY, DL, CmpVT, Movmsk); | |||
41384 | return DAG.getZExtOrTrunc(Result, DL, ExtractVT); | |||
41385 | } | |||
41386 | ||||
41387 | SDValue CmpC; | |||
41388 | ISD::CondCode CondCode; | |||
41389 | if (BinOp == ISD::OR) { | |||
41390 | // any_of -> MOVMSK != 0 | |||
41391 | CmpC = DAG.getConstant(0, DL, CmpVT); | |||
41392 | CondCode = ISD::CondCode::SETNE; | |||
41393 | } else { | |||
41394 | // all_of -> MOVMSK == ((1 << NumElts) - 1) | |||
41395 | CmpC = DAG.getConstant(APInt::getLowBitsSet(CmpVT.getSizeInBits(), NumElts), | |||
41396 | DL, CmpVT); | |||
41397 | CondCode = ISD::CondCode::SETEQ; | |||
41398 | } | |||
41399 | ||||
41400 | // The setcc produces an i8 of 0/1, so extend that to the result width and | |||
41401 | // negate to get the final 0/-1 mask value. | |||
41402 | EVT SetccVT = | |||
41403 | TLI.getSetCCResultType(DAG.getDataLayout(), *DAG.getContext(), CmpVT); | |||
41404 | SDValue Setcc = DAG.getSetCC(DL, SetccVT, Movmsk, CmpC, CondCode); | |||
41405 | SDValue Zext = DAG.getZExtOrTrunc(Setcc, DL, ExtractVT); | |||
41406 | SDValue Zero = DAG.getConstant(0, DL, ExtractVT); | |||
41407 | return DAG.getNode(ISD::SUB, DL, ExtractVT, Zero, Zext); | |||
41408 | } | |||
41409 | ||||
41410 | static SDValue combineBasicSADPattern(SDNode *Extract, SelectionDAG &DAG, | |||
41411 | const X86Subtarget &Subtarget) { | |||
41412 | // PSADBW is only supported on SSE2 and up. | |||
41413 | if (!Subtarget.hasSSE2()) | |||
41414 | return SDValue(); | |||
41415 | ||||
41416 | EVT ExtractVT = Extract->getValueType(0); | |||
41417 | // Verify the type we're extracting is either i32 or i64. | |||
41418 | // FIXME: Could support other types, but this is what we have coverage for. | |||
41419 | if (ExtractVT != MVT::i32 && ExtractVT != MVT::i64) | |||
41420 | return SDValue(); | |||
41421 | ||||
41422 | EVT VT = Extract->getOperand(0).getValueType(); | |||
41423 | if (!isPowerOf2_32(VT.getVectorNumElements())) | |||
41424 | return SDValue(); | |||
41425 | ||||
41426 | // Match shuffle + add pyramid. | |||
41427 | ISD::NodeType BinOp; | |||
41428 | SDValue Root = DAG.matchBinOpReduction(Extract, BinOp, {ISD::ADD}); | |||
41429 | ||||
41430 | // The operand is expected to be zero extended from i8 | |||
41431 | // (verified in detectZextAbsDiff). | |||
41432 | // In order to convert to i64 and above, additional any/zero/sign | |||
41433 | // extend is expected. | |||
41434 | // The zero extend from 32 bit has no mathematical effect on the result. | |||
41435 | // Also the sign extend is basically zero extend | |||
41436 | // (extends the sign bit which is zero). | |||
41437 | // So it is correct to skip the sign/zero extend instruction. | |||
41438 | if (Root && (Root.getOpcode() == ISD::SIGN_EXTEND || | |||
41439 | Root.getOpcode() == ISD::ZERO_EXTEND || | |||
41440 | Root.getOpcode() == ISD::ANY_EXTEND)) | |||
41441 | Root = Root.getOperand(0); | |||
41442 | ||||
41443 | // If there was a match, we want Root to be a select that is the root of an | |||
41444 | // abs-diff pattern. | |||
41445 | if (!Root || Root.getOpcode() != ISD::ABS) | |||
41446 | return SDValue(); | |||
41447 | ||||
41448 | // Check whether we have an abs-diff pattern feeding into the select. | |||
41449 | SDValue Zext0, Zext1; | |||
41450 | if (!detectZextAbsDiff(Root, Zext0, Zext1)) | |||
41451 | return SDValue(); | |||
41452 | ||||
41453 | // Create the SAD instruction. | |||
41454 | SDLoc DL(Extract); | |||
41455 | SDValue SAD = createPSADBW(DAG, Zext0, Zext1, DL, Subtarget); | |||
41456 | ||||
41457 | // If the original vector was wider than 8 elements, sum over the results | |||
41458 | // in the SAD vector. | |||
41459 | unsigned Stages = Log2_32(VT.getVectorNumElements()); | |||
41460 | EVT SadVT = SAD.getValueType(); | |||
41461 | if (Stages > 3) { | |||
41462 | unsigned SadElems = SadVT.getVectorNumElements(); | |||
41463 | ||||
41464 | for(unsigned i = Stages - 3; i > 0; --i) { | |||
41465 | SmallVector<int, 16> Mask(SadElems, -1); | |||
41466 | for(unsigned j = 0, MaskEnd = 1 << (i - 1); j < MaskEnd; ++j) | |||
41467 | Mask[j] = MaskEnd + j; | |||
41468 | ||||
41469 | SDValue Shuffle = | |||
41470 | DAG.getVectorShuffle(SadVT, DL, SAD, DAG.getUNDEF(SadVT), Mask); | |||
41471 | SAD = DAG.getNode(ISD::ADD, DL, SadVT, SAD, Shuffle); | |||
41472 | } | |||
41473 | } | |||
41474 | ||||
41475 | unsigned ExtractSizeInBits = ExtractVT.getSizeInBits(); | |||
41476 | // Return the lowest ExtractSizeInBits bits. | |||
41477 | EVT ResVT = EVT::getVectorVT(*DAG.getContext(), ExtractVT, | |||
41478 | SadVT.getSizeInBits() / ExtractSizeInBits); | |||
41479 | SAD = DAG.getBitcast(ResVT, SAD); | |||
41480 | return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, ExtractVT, SAD, | |||
41481 | Extract->getOperand(1)); | |||
41482 | } | |||
41483 | ||||
41484 | // Attempt to peek through a target shuffle and extract the scalar from the | |||
41485 | // source. | |||
41486 | static SDValue combineExtractWithShuffle(SDNode *N, SelectionDAG &DAG, | |||
41487 | TargetLowering::DAGCombinerInfo &DCI, | |||
41488 | const X86Subtarget &Subtarget) { | |||
41489 | if (DCI.isBeforeLegalizeOps()) | |||
41490 | return SDValue(); | |||
41491 | ||||
41492 | SDLoc dl(N); | |||
41493 | SDValue Src = N->getOperand(0); | |||
41494 | SDValue Idx = N->getOperand(1); | |||
41495 | ||||
41496 | EVT VT = N->getValueType(0); | |||
41497 | EVT SrcVT = Src.getValueType(); | |||
41498 | EVT SrcSVT = SrcVT.getVectorElementType(); | |||
41499 | unsigned SrcEltBits = SrcSVT.getSizeInBits(); | |||
41500 | unsigned NumSrcElts = SrcVT.getVectorNumElements(); | |||
41501 | ||||
41502 | // Don't attempt this for boolean mask vectors or unknown extraction indices. | |||
41503 | if (SrcSVT == MVT::i1 || !isa<ConstantSDNode>(Idx)) | |||
41504 | return SDValue(); | |||
41505 | ||||
41506 | const APInt &IdxC = N->getConstantOperandAPInt(1); | |||
41507 | if (IdxC.uge(NumSrcElts)) | |||
41508 | return SDValue(); | |||
41509 | ||||
41510 | SDValue SrcBC = peekThroughBitcasts(Src); | |||
41511 | ||||
41512 | // Handle extract(bitcast(broadcast(scalar_value))). | |||
41513 | if (X86ISD::VBROADCAST == SrcBC.getOpcode()) { | |||
41514 | SDValue SrcOp = SrcBC.getOperand(0); | |||
41515 | EVT SrcOpVT = SrcOp.getValueType(); | |||
41516 | if (SrcOpVT.isScalarInteger() && VT.isInteger() && | |||
41517 | (SrcOpVT.getSizeInBits() % SrcEltBits) == 0) { | |||
41518 | unsigned Scale = SrcOpVT.getSizeInBits() / SrcEltBits; | |||
41519 | unsigned Offset = IdxC.urem(Scale) * SrcEltBits; | |||
41520 | // TODO support non-zero offsets. | |||
41521 | if (Offset == 0) { | |||
41522 | SrcOp = DAG.getZExtOrTrunc(SrcOp, dl, SrcVT.getScalarType()); | |||
41523 | SrcOp = DAG.getZExtOrTrunc(SrcOp, dl, VT); | |||
41524 | return SrcOp; | |||
41525 | } | |||
41526 | } | |||
41527 | } | |||
41528 | ||||
41529 | // If we're extracting a single element from a broadcast load and there are | |||
41530 | // no other users, just create a single load. | |||
41531 | if (SrcBC.getOpcode() == X86ISD::VBROADCAST_LOAD && SrcBC.hasOneUse()) { | |||
41532 | auto *MemIntr = cast<MemIntrinsicSDNode>(SrcBC); | |||
41533 | unsigned SrcBCWidth = SrcBC.getScalarValueSizeInBits(); | |||
41534 | if (MemIntr->getMemoryVT().getSizeInBits() == SrcBCWidth && | |||
41535 | VT.getSizeInBits() == SrcBCWidth && SrcEltBits == SrcBCWidth) { | |||
41536 | SDValue Load = DAG.getLoad(VT, dl, MemIntr->getChain(), | |||
41537 | MemIntr->getBasePtr(), | |||
41538 | MemIntr->getPointerInfo(), | |||
41539 | MemIntr->getOriginalAlign(), | |||
41540 | MemIntr->getMemOperand()->getFlags()); | |||
41541 | DAG.ReplaceAllUsesOfValueWith(SDValue(MemIntr, 1), Load.getValue(1)); | |||
41542 | return Load; | |||
41543 | } | |||
41544 | } | |||
41545 | ||||
41546 | // Handle extract(bitcast(scalar_to_vector(scalar_value))) for integers. | |||
41547 | // TODO: Move to DAGCombine? | |||
41548 | if (SrcBC.getOpcode() == ISD::SCALAR_TO_VECTOR && VT.isInteger() && | |||
41549 | SrcBC.getValueType().isInteger() && | |||
41550 | (SrcBC.getScalarValueSizeInBits() % SrcEltBits) == 0 && | |||
41551 | SrcBC.getScalarValueSizeInBits() == | |||
41552 | SrcBC.getOperand(0).getValueSizeInBits()) { | |||
41553 | unsigned Scale = SrcBC.getScalarValueSizeInBits() / SrcEltBits; | |||
41554 | if (IdxC.ult(Scale)) { | |||
41555 | unsigned Offset = IdxC.getZExtValue() * SrcVT.getScalarSizeInBits(); | |||
41556 | SDValue Scl = SrcBC.getOperand(0); | |||
41557 | EVT SclVT = Scl.getValueType(); | |||
41558 | if (Offset) { | |||
41559 | Scl = DAG.getNode(ISD::SRL, dl, SclVT, Scl, | |||
41560 | DAG.getShiftAmountConstant(Offset, SclVT, dl)); | |||
41561 | } | |||
41562 | Scl = DAG.getZExtOrTrunc(Scl, dl, SrcVT.getScalarType()); | |||
41563 | Scl = DAG.getZExtOrTrunc(Scl, dl, VT); | |||
41564 | return Scl; | |||
41565 | } | |||
41566 | } | |||
41567 | ||||
41568 | // Handle extract(truncate(x)) for 0'th index. | |||
41569 | // TODO: Treat this as a faux shuffle? | |||
41570 | // TODO: When can we use this for general indices? | |||
41571 | if (ISD::TRUNCATE == Src.getOpcode() && IdxC == 0 && | |||
41572 | (SrcVT.getSizeInBits() % 128) == 0) { | |||
41573 | Src = extract128BitVector(Src.getOperand(0), 0, DAG, dl); | |||
41574 | MVT ExtractVT = MVT::getVectorVT(SrcSVT.getSimpleVT(), 128 / SrcEltBits); | |||
41575 | return DAG.getNode(N->getOpcode(), dl, VT, DAG.getBitcast(ExtractVT, Src), | |||
41576 | Idx); | |||
41577 | } | |||
41578 | ||||
41579 | // We can only legally extract other elements from 128-bit vectors and in | |||
41580 | // certain circumstances, depending on SSE-level. | |||
41581 | // TODO: Investigate float/double extraction if it will be just stored. | |||
41582 | auto GetLegalExtract = [&Subtarget, &DAG, &dl](SDValue Vec, EVT VecVT, | |||
41583 | unsigned Idx) { | |||
41584 | EVT VecSVT = VecVT.getScalarType(); | |||
41585 | if ((VecVT.is256BitVector() || VecVT.is512BitVector()) && | |||
41586 | (VecSVT == MVT::i8 || VecSVT == MVT::i16 || VecSVT == MVT::i32 || | |||
41587 | VecSVT == MVT::i64)) { | |||
41588 | unsigned EltSizeInBits = VecSVT.getSizeInBits(); | |||
41589 | unsigned NumEltsPerLane = 128 / EltSizeInBits; | |||
41590 | unsigned LaneOffset = (Idx & ~(NumEltsPerLane - 1)) * EltSizeInBits; | |||
41591 | unsigned LaneIdx = LaneOffset / Vec.getScalarValueSizeInBits(); | |||
41592 | VecVT = EVT::getVectorVT(*DAG.getContext(), VecSVT, NumEltsPerLane); | |||
41593 | Vec = extract128BitVector(Vec, LaneIdx, DAG, dl); | |||
41594 | Idx &= (NumEltsPerLane - 1); | |||
41595 | } | |||
41596 | if ((VecVT == MVT::v4i32 || VecVT == MVT::v2i64) && | |||
41597 | ((Idx == 0 && Subtarget.hasSSE2()) || Subtarget.hasSSE41())) { | |||
41598 | return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, VecVT.getScalarType(), | |||
41599 | DAG.getBitcast(VecVT, Vec), | |||
41600 | DAG.getIntPtrConstant(Idx, dl)); | |||
41601 | } | |||
41602 | if ((VecVT == MVT::v8i16 && Subtarget.hasSSE2()) || | |||
41603 | (VecVT == MVT::v16i8 && Subtarget.hasSSE41())) { | |||
41604 | unsigned OpCode = (VecVT == MVT::v8i16 ? X86ISD::PEXTRW : X86ISD::PEXTRB); | |||
41605 | return DAG.getNode(OpCode, dl, MVT::i32, DAG.getBitcast(VecVT, Vec), | |||
41606 | DAG.getTargetConstant(Idx, dl, MVT::i8)); | |||
41607 | } | |||
41608 | return SDValue(); | |||
41609 | }; | |||
41610 | ||||
41611 | // Resolve the target shuffle inputs and mask. | |||
41612 | SmallVector<int, 16> Mask; | |||
41613 | SmallVector<SDValue, 2> Ops; | |||
41614 | if (!getTargetShuffleInputs(SrcBC, Ops, Mask, DAG)) | |||
41615 | return SDValue(); | |||
41616 | ||||
41617 | // Shuffle inputs must be the same size as the result. | |||
41618 | if (llvm::any_of(Ops, [SrcVT](SDValue Op) { | |||
41619 | return SrcVT.getSizeInBits() != Op.getValueSizeInBits(); | |||
41620 | })) | |||
41621 | return SDValue(); | |||
41622 | ||||
41623 | // Attempt to narrow/widen the shuffle mask to the correct size. | |||
41624 | if (Mask.size() != NumSrcElts) { | |||
41625 | if ((NumSrcElts % Mask.size()) == 0) { | |||
41626 | SmallVector<int, 16> ScaledMask; | |||
41627 | int Scale = NumSrcElts / Mask.size(); | |||
41628 | narrowShuffleMaskElts(Scale, Mask, ScaledMask); | |||
41629 | Mask = std::move(ScaledMask); | |||
41630 | } else if ((Mask.size() % NumSrcElts) == 0) { | |||
41631 | // Simplify Mask based on demanded element. | |||
41632 | int ExtractIdx = (int)IdxC.getZExtValue(); | |||
41633 | int Scale = Mask.size() / NumSrcElts; | |||
41634 | int Lo = Scale * ExtractIdx; | |||
41635 | int Hi = Scale * (ExtractIdx + 1); | |||
41636 | for (int i = 0, e = (int)Mask.size(); i != e; ++i) | |||
41637 | if (i < Lo || Hi <= i) | |||
41638 | Mask[i] = SM_SentinelUndef; | |||
41639 | ||||
41640 | SmallVector<int, 16> WidenedMask; | |||
41641 | while (Mask.size() > NumSrcElts && | |||
41642 | canWidenShuffleElements(Mask, WidenedMask)) | |||
41643 | Mask = std::move(WidenedMask); | |||
41644 | } | |||
41645 | } | |||
41646 | ||||
41647 | // If narrowing/widening failed, see if we can extract+zero-extend. | |||
41648 | int ExtractIdx; | |||
41649 | EVT ExtractVT; | |||
41650 | if (Mask.size() == NumSrcElts) { | |||
41651 | ExtractIdx = Mask[IdxC.getZExtValue()]; | |||
41652 | ExtractVT = SrcVT; | |||
41653 | } else { | |||
41654 | unsigned Scale = Mask.size() / NumSrcElts; | |||
41655 | if ((Mask.size() % NumSrcElts) != 0 || SrcVT.isFloatingPoint()) | |||
41656 | return SDValue(); | |||
41657 | unsigned ScaledIdx = Scale * IdxC.getZExtValue(); | |||
41658 | if (!isUndefOrZeroInRange(Mask, ScaledIdx + 1, Scale - 1)) | |||
41659 | return SDValue(); | |||
41660 | ExtractIdx = Mask[ScaledIdx]; | |||
41661 | EVT ExtractSVT = EVT::getIntegerVT(*DAG.getContext(), SrcEltBits / Scale); | |||
41662 | ExtractVT = EVT::getVectorVT(*DAG.getContext(), ExtractSVT, Mask.size()); | |||
41663 | assert(SrcVT.getSizeInBits() == ExtractVT.getSizeInBits() &&(static_cast <bool> (SrcVT.getSizeInBits() == ExtractVT .getSizeInBits() && "Failed to widen vector type") ? void (0) : __assert_fail ("SrcVT.getSizeInBits() == ExtractVT.getSizeInBits() && \"Failed to widen vector type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 41664, __extension__ __PRETTY_FUNCTION__)) | |||
41664 | "Failed to widen vector type")(static_cast <bool> (SrcVT.getSizeInBits() == ExtractVT .getSizeInBits() && "Failed to widen vector type") ? void (0) : __assert_fail ("SrcVT.getSizeInBits() == ExtractVT.getSizeInBits() && \"Failed to widen vector type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 41664, __extension__ __PRETTY_FUNCTION__)); | |||
41665 | } | |||
41666 | ||||
41667 | // If the shuffle source element is undef/zero then we can just accept it. | |||
41668 | if (ExtractIdx == SM_SentinelUndef) | |||
41669 | return DAG.getUNDEF(VT); | |||
41670 | ||||
41671 | if (ExtractIdx == SM_SentinelZero) | |||
41672 | return VT.isFloatingPoint() ? DAG.getConstantFP(0.0, dl, VT) | |||
41673 | : DAG.getConstant(0, dl, VT); | |||
41674 | ||||
41675 | SDValue SrcOp = Ops[ExtractIdx / Mask.size()]; | |||
41676 | ExtractIdx = ExtractIdx % Mask.size(); | |||
41677 | if (SDValue V = GetLegalExtract(SrcOp, ExtractVT, ExtractIdx)) | |||
41678 | return DAG.getZExtOrTrunc(V, dl, VT); | |||
41679 | ||||
41680 | return SDValue(); | |||
41681 | } | |||
41682 | ||||
41683 | /// Extracting a scalar FP value from vector element 0 is free, so extract each | |||
41684 | /// operand first, then perform the math as a scalar op. | |||
41685 | static SDValue scalarizeExtEltFP(SDNode *ExtElt, SelectionDAG &DAG, | |||
41686 | const X86Subtarget &Subtarget) { | |||
41687 | assert(ExtElt->getOpcode() == ISD::EXTRACT_VECTOR_ELT && "Expected extract")(static_cast <bool> (ExtElt->getOpcode() == ISD::EXTRACT_VECTOR_ELT && "Expected extract") ? void (0) : __assert_fail ("ExtElt->getOpcode() == ISD::EXTRACT_VECTOR_ELT && \"Expected extract\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 41687, __extension__ __PRETTY_FUNCTION__)); | |||
41688 | SDValue Vec = ExtElt->getOperand(0); | |||
41689 | SDValue Index = ExtElt->getOperand(1); | |||
41690 | EVT VT = ExtElt->getValueType(0); | |||
41691 | EVT VecVT = Vec.getValueType(); | |||
41692 | ||||
41693 | // TODO: If this is a unary/expensive/expand op, allow extraction from a | |||
41694 | // non-zero element because the shuffle+scalar op will be cheaper? | |||
41695 | if (!Vec.hasOneUse() || !isNullConstant(Index) || VecVT.getScalarType() != VT) | |||
41696 | return SDValue(); | |||
41697 | ||||
41698 | // Vector FP compares don't fit the pattern of FP math ops (propagate, not | |||
41699 | // extract, the condition code), so deal with those as a special-case. | |||
41700 | if (Vec.getOpcode() == ISD::SETCC && VT == MVT::i1) { | |||
41701 | EVT OpVT = Vec.getOperand(0).getValueType().getScalarType(); | |||
41702 | if (OpVT != MVT::f32 && OpVT != MVT::f64) | |||
41703 | return SDValue(); | |||
41704 | ||||
41705 | // extract (setcc X, Y, CC), 0 --> setcc (extract X, 0), (extract Y, 0), CC | |||
41706 | SDLoc DL(ExtElt); | |||
41707 | SDValue Ext0 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, OpVT, | |||
41708 | Vec.getOperand(0), Index); | |||
41709 | SDValue Ext1 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, OpVT, | |||
41710 | Vec.getOperand(1), Index); | |||
41711 | return DAG.getNode(Vec.getOpcode(), DL, VT, Ext0, Ext1, Vec.getOperand(2)); | |||
41712 | } | |||
41713 | ||||
41714 | if (!(VT == MVT::f16 && Subtarget.hasFP16()) && VT != MVT::f32 && | |||
41715 | VT != MVT::f64) | |||
41716 | return SDValue(); | |||
41717 | ||||
41718 | // Vector FP selects don't fit the pattern of FP math ops (because the | |||
41719 | // condition has a different type and we have to change the opcode), so deal | |||
41720 | // with those here. | |||
41721 | // FIXME: This is restricted to pre type legalization by ensuring the setcc | |||
41722 | // has i1 elements. If we loosen this we need to convert vector bool to a | |||
41723 | // scalar bool. | |||
41724 | if (Vec.getOpcode() == ISD::VSELECT && | |||
41725 | Vec.getOperand(0).getOpcode() == ISD::SETCC && | |||
41726 | Vec.getOperand(0).getValueType().getScalarType() == MVT::i1 && | |||
41727 | Vec.getOperand(0).getOperand(0).getValueType() == VecVT) { | |||
41728 | // ext (sel Cond, X, Y), 0 --> sel (ext Cond, 0), (ext X, 0), (ext Y, 0) | |||
41729 | SDLoc DL(ExtElt); | |||
41730 | SDValue Ext0 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, | |||
41731 | Vec.getOperand(0).getValueType().getScalarType(), | |||
41732 | Vec.getOperand(0), Index); | |||
41733 | SDValue Ext1 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, VT, | |||
41734 | Vec.getOperand(1), Index); | |||
41735 | SDValue Ext2 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, VT, | |||
41736 | Vec.getOperand(2), Index); | |||
41737 | return DAG.getNode(ISD::SELECT, DL, VT, Ext0, Ext1, Ext2); | |||
41738 | } | |||
41739 | ||||
41740 | // TODO: This switch could include FNEG and the x86-specific FP logic ops | |||
41741 | // (FAND, FANDN, FOR, FXOR). But that may require enhancements to avoid | |||
41742 | // missed load folding and fma+fneg combining. | |||
41743 | switch (Vec.getOpcode()) { | |||
41744 | case ISD::FMA: // Begin 3 operands | |||
41745 | case ISD::FMAD: | |||
41746 | case ISD::FADD: // Begin 2 operands | |||
41747 | case ISD::FSUB: | |||
41748 | case ISD::FMUL: | |||
41749 | case ISD::FDIV: | |||
41750 | case ISD::FREM: | |||
41751 | case ISD::FCOPYSIGN: | |||
41752 | case ISD::FMINNUM: | |||
41753 | case ISD::FMAXNUM: | |||
41754 | case ISD::FMINNUM_IEEE: | |||
41755 | case ISD::FMAXNUM_IEEE: | |||
41756 | case ISD::FMAXIMUM: | |||
41757 | case ISD::FMINIMUM: | |||
41758 | case X86ISD::FMAX: | |||
41759 | case X86ISD::FMIN: | |||
41760 | case ISD::FABS: // Begin 1 operand | |||
41761 | case ISD::FSQRT: | |||
41762 | case ISD::FRINT: | |||
41763 | case ISD::FCEIL: | |||
41764 | case ISD::FTRUNC: | |||
41765 | case ISD::FNEARBYINT: | |||
41766 | case ISD::FROUND: | |||
41767 | case ISD::FFLOOR: | |||
41768 | case X86ISD::FRCP: | |||
41769 | case X86ISD::FRSQRT: { | |||
41770 | // extract (fp X, Y, ...), 0 --> fp (extract X, 0), (extract Y, 0), ... | |||
41771 | SDLoc DL(ExtElt); | |||
41772 | SmallVector<SDValue, 4> ExtOps; | |||
41773 | for (SDValue Op : Vec->ops()) | |||
41774 | ExtOps.push_back(DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, VT, Op, Index)); | |||
41775 | return DAG.getNode(Vec.getOpcode(), DL, VT, ExtOps); | |||
41776 | } | |||
41777 | default: | |||
41778 | return SDValue(); | |||
41779 | } | |||
41780 | llvm_unreachable("All opcodes should return within switch")::llvm::llvm_unreachable_internal("All opcodes should return within switch" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 41780); | |||
41781 | } | |||
41782 | ||||
41783 | /// Try to convert a vector reduction sequence composed of binops and shuffles | |||
41784 | /// into horizontal ops. | |||
41785 | static SDValue combineArithReduction(SDNode *ExtElt, SelectionDAG &DAG, | |||
41786 | const X86Subtarget &Subtarget) { | |||
41787 | assert(ExtElt->getOpcode() == ISD::EXTRACT_VECTOR_ELT && "Unexpected caller")(static_cast <bool> (ExtElt->getOpcode() == ISD::EXTRACT_VECTOR_ELT && "Unexpected caller") ? void (0) : __assert_fail ( "ExtElt->getOpcode() == ISD::EXTRACT_VECTOR_ELT && \"Unexpected caller\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 41787, __extension__ __PRETTY_FUNCTION__)); | |||
41788 | ||||
41789 | // We need at least SSE2 to anything here. | |||
41790 | if (!Subtarget.hasSSE2()) | |||
41791 | return SDValue(); | |||
41792 | ||||
41793 | ISD::NodeType Opc; | |||
41794 | SDValue Rdx = DAG.matchBinOpReduction(ExtElt, Opc, | |||
41795 | {ISD::ADD, ISD::MUL, ISD::FADD}, true); | |||
41796 | if (!Rdx) | |||
41797 | return SDValue(); | |||
41798 | ||||
41799 | SDValue Index = ExtElt->getOperand(1); | |||
41800 | assert(isNullConstant(Index) &&(static_cast <bool> (isNullConstant(Index) && "Reduction doesn't end in an extract from index 0" ) ? void (0) : __assert_fail ("isNullConstant(Index) && \"Reduction doesn't end in an extract from index 0\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 41801, __extension__ __PRETTY_FUNCTION__)) | |||
41801 | "Reduction doesn't end in an extract from index 0")(static_cast <bool> (isNullConstant(Index) && "Reduction doesn't end in an extract from index 0" ) ? void (0) : __assert_fail ("isNullConstant(Index) && \"Reduction doesn't end in an extract from index 0\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 41801, __extension__ __PRETTY_FUNCTION__)); | |||
41802 | ||||
41803 | EVT VT = ExtElt->getValueType(0); | |||
41804 | EVT VecVT = Rdx.getValueType(); | |||
41805 | if (VecVT.getScalarType() != VT) | |||
41806 | return SDValue(); | |||
41807 | ||||
41808 | SDLoc DL(ExtElt); | |||
41809 | ||||
41810 | // vXi8 mul reduction - promote to vXi16 mul reduction. | |||
41811 | if (Opc == ISD::MUL) { | |||
41812 | unsigned NumElts = VecVT.getVectorNumElements(); | |||
41813 | if (VT != MVT::i8 || NumElts < 4 || !isPowerOf2_32(NumElts)) | |||
41814 | return SDValue(); | |||
41815 | if (VecVT.getSizeInBits() >= 128) { | |||
41816 | EVT WideVT = EVT::getVectorVT(*DAG.getContext(), MVT::i16, NumElts / 2); | |||
41817 | SDValue Lo = getUnpackl(DAG, DL, VecVT, Rdx, DAG.getUNDEF(VecVT)); | |||
41818 | SDValue Hi = getUnpackh(DAG, DL, VecVT, Rdx, DAG.getUNDEF(VecVT)); | |||
41819 | Lo = DAG.getBitcast(WideVT, Lo); | |||
41820 | Hi = DAG.getBitcast(WideVT, Hi); | |||
41821 | Rdx = DAG.getNode(Opc, DL, WideVT, Lo, Hi); | |||
41822 | while (Rdx.getValueSizeInBits() > 128) { | |||
41823 | std::tie(Lo, Hi) = splitVector(Rdx, DAG, DL); | |||
41824 | Rdx = DAG.getNode(Opc, DL, Lo.getValueType(), Lo, Hi); | |||
41825 | } | |||
41826 | } else { | |||
41827 | if (VecVT == MVT::v4i8) | |||
41828 | Rdx = DAG.getNode(ISD::CONCAT_VECTORS, DL, MVT::v8i8, Rdx, | |||
41829 | DAG.getUNDEF(MVT::v4i8)); | |||
41830 | Rdx = DAG.getNode(ISD::CONCAT_VECTORS, DL, MVT::v16i8, Rdx, | |||
41831 | DAG.getUNDEF(MVT::v8i8)); | |||
41832 | Rdx = getUnpackl(DAG, DL, MVT::v16i8, Rdx, DAG.getUNDEF(MVT::v16i8)); | |||
41833 | Rdx = DAG.getBitcast(MVT::v8i16, Rdx); | |||
41834 | } | |||
41835 | if (NumElts >= 8) | |||
41836 | Rdx = DAG.getNode(Opc, DL, MVT::v8i16, Rdx, | |||
41837 | DAG.getVectorShuffle(MVT::v8i16, DL, Rdx, Rdx, | |||
41838 | {4, 5, 6, 7, -1, -1, -1, -1})); | |||
41839 | Rdx = DAG.getNode(Opc, DL, MVT::v8i16, Rdx, | |||
41840 | DAG.getVectorShuffle(MVT::v8i16, DL, Rdx, Rdx, | |||
41841 | {2, 3, -1, -1, -1, -1, -1, -1})); | |||
41842 | Rdx = DAG.getNode(Opc, DL, MVT::v8i16, Rdx, | |||
41843 | DAG.getVectorShuffle(MVT::v8i16, DL, Rdx, Rdx, | |||
41844 | {1, -1, -1, -1, -1, -1, -1, -1})); | |||
41845 | Rdx = DAG.getBitcast(MVT::v16i8, Rdx); | |||
41846 | return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, VT, Rdx, Index); | |||
41847 | } | |||
41848 | ||||
41849 | // vXi8 add reduction - sub 128-bit vector. | |||
41850 | if (VecVT == MVT::v4i8 || VecVT == MVT::v8i8) { | |||
41851 | if (VecVT == MVT::v4i8) { | |||
41852 | // Pad with zero. | |||
41853 | if (Subtarget.hasSSE41()) { | |||
41854 | Rdx = DAG.getBitcast(MVT::i32, Rdx); | |||
41855 | Rdx = DAG.getNode(ISD::INSERT_VECTOR_ELT, DL, MVT::v4i32, | |||
41856 | DAG.getConstant(0, DL, MVT::v4i32), Rdx, | |||
41857 | DAG.getIntPtrConstant(0, DL)); | |||
41858 | Rdx = DAG.getBitcast(MVT::v16i8, Rdx); | |||
41859 | } else { | |||
41860 | Rdx = DAG.getNode(ISD::CONCAT_VECTORS, DL, MVT::v8i8, Rdx, | |||
41861 | DAG.getConstant(0, DL, VecVT)); | |||
41862 | } | |||
41863 | } | |||
41864 | if (Rdx.getValueType() == MVT::v8i8) { | |||
41865 | // Pad with undef. | |||
41866 | Rdx = DAG.getNode(ISD::CONCAT_VECTORS, DL, MVT::v16i8, Rdx, | |||
41867 | DAG.getUNDEF(MVT::v8i8)); | |||
41868 | } | |||
41869 | Rdx = DAG.getNode(X86ISD::PSADBW, DL, MVT::v2i64, Rdx, | |||
41870 | DAG.getConstant(0, DL, MVT::v16i8)); | |||
41871 | Rdx = DAG.getBitcast(MVT::v16i8, Rdx); | |||
41872 | return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, VT, Rdx, Index); | |||
41873 | } | |||
41874 | ||||
41875 | // Must be a >=128-bit vector with pow2 elements. | |||
41876 | if ((VecVT.getSizeInBits() % 128) != 0 || | |||
41877 | !isPowerOf2_32(VecVT.getVectorNumElements())) | |||
41878 | return SDValue(); | |||
41879 | ||||
41880 | // vXi8 add reduction - sum lo/hi halves then use PSADBW. | |||
41881 | if (VT == MVT::i8) { | |||
41882 | while (Rdx.getValueSizeInBits() > 128) { | |||
41883 | SDValue Lo, Hi; | |||
41884 | std::tie(Lo, Hi) = splitVector(Rdx, DAG, DL); | |||
41885 | VecVT = Lo.getValueType(); | |||
41886 | Rdx = DAG.getNode(ISD::ADD, DL, VecVT, Lo, Hi); | |||
41887 | } | |||
41888 | assert(VecVT == MVT::v16i8 && "v16i8 reduction expected")(static_cast <bool> (VecVT == MVT::v16i8 && "v16i8 reduction expected" ) ? void (0) : __assert_fail ("VecVT == MVT::v16i8 && \"v16i8 reduction expected\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 41888, __extension__ __PRETTY_FUNCTION__)); | |||
41889 | ||||
41890 | SDValue Hi = DAG.getVectorShuffle( | |||
41891 | MVT::v16i8, DL, Rdx, Rdx, | |||
41892 | {8, 9, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1}); | |||
41893 | Rdx = DAG.getNode(ISD::ADD, DL, MVT::v16i8, Rdx, Hi); | |||
41894 | Rdx = DAG.getNode(X86ISD::PSADBW, DL, MVT::v2i64, Rdx, | |||
41895 | getZeroVector(MVT::v16i8, Subtarget, DAG, DL)); | |||
41896 | Rdx = DAG.getBitcast(MVT::v16i8, Rdx); | |||
41897 | return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, VT, Rdx, Index); | |||
41898 | } | |||
41899 | ||||
41900 | // Only use (F)HADD opcodes if they aren't microcoded or minimizes codesize. | |||
41901 | if (!shouldUseHorizontalOp(true, DAG, Subtarget)) | |||
41902 | return SDValue(); | |||
41903 | ||||
41904 | unsigned HorizOpcode = Opc == ISD::ADD ? X86ISD::HADD : X86ISD::FHADD; | |||
41905 | ||||
41906 | // 256-bit horizontal instructions operate on 128-bit chunks rather than | |||
41907 | // across the whole vector, so we need an extract + hop preliminary stage. | |||
41908 | // This is the only step where the operands of the hop are not the same value. | |||
41909 | // TODO: We could extend this to handle 512-bit or even longer vectors. | |||
41910 | if (((VecVT == MVT::v16i16 || VecVT == MVT::v8i32) && Subtarget.hasSSSE3()) || | |||
41911 | ((VecVT == MVT::v8f32 || VecVT == MVT::v4f64) && Subtarget.hasSSE3())) { | |||
41912 | unsigned NumElts = VecVT.getVectorNumElements(); | |||
41913 | SDValue Hi = extract128BitVector(Rdx, NumElts / 2, DAG, DL); | |||
41914 | SDValue Lo = extract128BitVector(Rdx, 0, DAG, DL); | |||
41915 | Rdx = DAG.getNode(HorizOpcode, DL, Lo.getValueType(), Hi, Lo); | |||
41916 | VecVT = Rdx.getValueType(); | |||
41917 | } | |||
41918 | if (!((VecVT == MVT::v8i16 || VecVT == MVT::v4i32) && Subtarget.hasSSSE3()) && | |||
41919 | !((VecVT == MVT::v4f32 || VecVT == MVT::v2f64) && Subtarget.hasSSE3())) | |||
41920 | return SDValue(); | |||
41921 | ||||
41922 | // extract (add (shuf X), X), 0 --> extract (hadd X, X), 0 | |||
41923 | unsigned ReductionSteps = Log2_32(VecVT.getVectorNumElements()); | |||
41924 | for (unsigned i = 0; i != ReductionSteps; ++i) | |||
41925 | Rdx = DAG.getNode(HorizOpcode, DL, VecVT, Rdx, Rdx); | |||
41926 | ||||
41927 | return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, VT, Rdx, Index); | |||
41928 | } | |||
41929 | ||||
41930 | /// Detect vector gather/scatter index generation and convert it from being a | |||
41931 | /// bunch of shuffles and extracts into a somewhat faster sequence. | |||
41932 | /// For i686, the best sequence is apparently storing the value and loading | |||
41933 | /// scalars back, while for x64 we should use 64-bit extracts and shifts. | |||
41934 | static SDValue combineExtractVectorElt(SDNode *N, SelectionDAG &DAG, | |||
41935 | TargetLowering::DAGCombinerInfo &DCI, | |||
41936 | const X86Subtarget &Subtarget) { | |||
41937 | if (SDValue NewOp = combineExtractWithShuffle(N, DAG, DCI, Subtarget)) | |||
41938 | return NewOp; | |||
41939 | ||||
41940 | SDValue InputVector = N->getOperand(0); | |||
41941 | SDValue EltIdx = N->getOperand(1); | |||
41942 | auto *CIdx = dyn_cast<ConstantSDNode>(EltIdx); | |||
41943 | ||||
41944 | EVT SrcVT = InputVector.getValueType(); | |||
41945 | EVT VT = N->getValueType(0); | |||
41946 | SDLoc dl(InputVector); | |||
41947 | bool IsPextr = N->getOpcode() != ISD::EXTRACT_VECTOR_ELT; | |||
41948 | unsigned NumSrcElts = SrcVT.getVectorNumElements(); | |||
41949 | ||||
41950 | if (CIdx && CIdx->getAPIntValue().uge(NumSrcElts)) | |||
41951 | return IsPextr ? DAG.getConstant(0, dl, VT) : DAG.getUNDEF(VT); | |||
41952 | ||||
41953 | // Integer Constant Folding. | |||
41954 | if (CIdx && VT.isInteger()) { | |||
41955 | APInt UndefVecElts; | |||
41956 | SmallVector<APInt, 16> EltBits; | |||
41957 | unsigned VecEltBitWidth = SrcVT.getScalarSizeInBits(); | |||
41958 | if (getTargetConstantBitsFromNode(InputVector, VecEltBitWidth, UndefVecElts, | |||
41959 | EltBits, true, false)) { | |||
41960 | uint64_t Idx = CIdx->getZExtValue(); | |||
41961 | if (UndefVecElts[Idx]) | |||
41962 | return IsPextr ? DAG.getConstant(0, dl, VT) : DAG.getUNDEF(VT); | |||
41963 | return DAG.getConstant(EltBits[Idx].zextOrSelf(VT.getScalarSizeInBits()), | |||
41964 | dl, VT); | |||
41965 | } | |||
41966 | } | |||
41967 | ||||
41968 | if (IsPextr) { | |||
41969 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
41970 | if (TLI.SimplifyDemandedBits( | |||
41971 | SDValue(N, 0), APInt::getAllOnesValue(VT.getSizeInBits()), DCI)) | |||
41972 | return SDValue(N, 0); | |||
41973 | ||||
41974 | // PEXTR*(PINSR*(v, s, c), c) -> s (with implicit zext handling). | |||
41975 | if ((InputVector.getOpcode() == X86ISD::PINSRB || | |||
41976 | InputVector.getOpcode() == X86ISD::PINSRW) && | |||
41977 | InputVector.getOperand(2) == EltIdx) { | |||
41978 | assert(SrcVT == InputVector.getOperand(0).getValueType() &&(static_cast <bool> (SrcVT == InputVector.getOperand(0) .getValueType() && "Vector type mismatch") ? void (0) : __assert_fail ("SrcVT == InputVector.getOperand(0).getValueType() && \"Vector type mismatch\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 41979, __extension__ __PRETTY_FUNCTION__)) | |||
41979 | "Vector type mismatch")(static_cast <bool> (SrcVT == InputVector.getOperand(0) .getValueType() && "Vector type mismatch") ? void (0) : __assert_fail ("SrcVT == InputVector.getOperand(0).getValueType() && \"Vector type mismatch\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 41979, __extension__ __PRETTY_FUNCTION__)); | |||
41980 | SDValue Scl = InputVector.getOperand(1); | |||
41981 | Scl = DAG.getNode(ISD::TRUNCATE, dl, SrcVT.getScalarType(), Scl); | |||
41982 | return DAG.getZExtOrTrunc(Scl, dl, VT); | |||
41983 | } | |||
41984 | ||||
41985 | // TODO - Remove this once we can handle the implicit zero-extension of | |||
41986 | // X86ISD::PEXTRW/X86ISD::PEXTRB in combinePredicateReduction and | |||
41987 | // combineBasicSADPattern. | |||
41988 | return SDValue(); | |||
41989 | } | |||
41990 | ||||
41991 | // Detect mmx extraction of all bits as a i64. It works better as a bitcast. | |||
41992 | if (InputVector.getOpcode() == ISD::BITCAST && InputVector.hasOneUse() && | |||
41993 | VT == MVT::i64 && SrcVT == MVT::v1i64 && isNullConstant(EltIdx)) { | |||
41994 | SDValue MMXSrc = InputVector.getOperand(0); | |||
41995 | ||||
41996 | // The bitcast source is a direct mmx result. | |||
41997 | if (MMXSrc.getValueType() == MVT::x86mmx) | |||
41998 | return DAG.getBitcast(VT, InputVector); | |||
41999 | } | |||
42000 | ||||
42001 | // Detect mmx to i32 conversion through a v2i32 elt extract. | |||
42002 | if (InputVector.getOpcode() == ISD::BITCAST && InputVector.hasOneUse() && | |||
42003 | VT == MVT::i32 && SrcVT == MVT::v2i32 && isNullConstant(EltIdx)) { | |||
42004 | SDValue MMXSrc = InputVector.getOperand(0); | |||
42005 | ||||
42006 | // The bitcast source is a direct mmx result. | |||
42007 | if (MMXSrc.getValueType() == MVT::x86mmx) | |||
42008 | return DAG.getNode(X86ISD::MMX_MOVD2W, dl, MVT::i32, MMXSrc); | |||
42009 | } | |||
42010 | ||||
42011 | // Check whether this extract is the root of a sum of absolute differences | |||
42012 | // pattern. This has to be done here because we really want it to happen | |||
42013 | // pre-legalization, | |||
42014 | if (SDValue SAD = combineBasicSADPattern(N, DAG, Subtarget)) | |||
42015 | return SAD; | |||
42016 | ||||
42017 | // Attempt to replace an all_of/any_of horizontal reduction with a MOVMSK. | |||
42018 | if (SDValue Cmp = combinePredicateReduction(N, DAG, Subtarget)) | |||
42019 | return Cmp; | |||
42020 | ||||
42021 | // Attempt to replace min/max v8i16/v16i8 reductions with PHMINPOSUW. | |||
42022 | if (SDValue MinMax = combineMinMaxReduction(N, DAG, Subtarget)) | |||
42023 | return MinMax; | |||
42024 | ||||
42025 | // Attempt to optimize ADD/FADD/MUL reductions with HADD, promotion etc.. | |||
42026 | if (SDValue V = combineArithReduction(N, DAG, Subtarget)) | |||
42027 | return V; | |||
42028 | ||||
42029 | if (SDValue V = scalarizeExtEltFP(N, DAG, Subtarget)) | |||
42030 | return V; | |||
42031 | ||||
42032 | // Attempt to extract a i1 element by using MOVMSK to extract the signbits | |||
42033 | // and then testing the relevant element. | |||
42034 | // | |||
42035 | // Note that we only combine extracts on the *same* result number, i.e. | |||
42036 | // t0 = merge_values a0, a1, a2, a3 | |||
42037 | // i1 = extract_vector_elt t0, Constant:i64<2> | |||
42038 | // i1 = extract_vector_elt t0, Constant:i64<3> | |||
42039 | // but not | |||
42040 | // i1 = extract_vector_elt t0:1, Constant:i64<2> | |||
42041 | // since the latter would need its own MOVMSK. | |||
42042 | if (CIdx && SrcVT.getScalarType() == MVT::i1) { | |||
42043 | SmallVector<SDNode *, 16> BoolExtracts; | |||
42044 | unsigned ResNo = InputVector.getResNo(); | |||
42045 | auto IsBoolExtract = [&BoolExtracts, &ResNo](SDNode *Use) { | |||
42046 | if (Use->getOpcode() == ISD::EXTRACT_VECTOR_ELT && | |||
42047 | isa<ConstantSDNode>(Use->getOperand(1)) && | |||
42048 | Use->getOperand(0).getResNo() == ResNo && | |||
42049 | Use->getValueType(0) == MVT::i1) { | |||
42050 | BoolExtracts.push_back(Use); | |||
42051 | return true; | |||
42052 | } | |||
42053 | return false; | |||
42054 | }; | |||
42055 | if (all_of(InputVector->uses(), IsBoolExtract) && | |||
42056 | BoolExtracts.size() > 1) { | |||
42057 | EVT BCVT = EVT::getIntegerVT(*DAG.getContext(), NumSrcElts); | |||
42058 | if (SDValue BC = | |||
42059 | combineBitcastvxi1(DAG, BCVT, InputVector, dl, Subtarget)) { | |||
42060 | for (SDNode *Use : BoolExtracts) { | |||
42061 | // extractelement vXi1 X, MaskIdx --> ((movmsk X) & Mask) == Mask | |||
42062 | unsigned MaskIdx = Use->getConstantOperandVal(1); | |||
42063 | APInt MaskBit = APInt::getOneBitSet(NumSrcElts, MaskIdx); | |||
42064 | SDValue Mask = DAG.getConstant(MaskBit, dl, BCVT); | |||
42065 | SDValue Res = DAG.getNode(ISD::AND, dl, BCVT, BC, Mask); | |||
42066 | Res = DAG.getSetCC(dl, MVT::i1, Res, Mask, ISD::SETEQ); | |||
42067 | DCI.CombineTo(Use, Res); | |||
42068 | } | |||
42069 | return SDValue(N, 0); | |||
42070 | } | |||
42071 | } | |||
42072 | } | |||
42073 | ||||
42074 | return SDValue(); | |||
42075 | } | |||
42076 | ||||
42077 | /// If a vector select has an operand that is -1 or 0, try to simplify the | |||
42078 | /// select to a bitwise logic operation. | |||
42079 | /// TODO: Move to DAGCombiner, possibly using TargetLowering::hasAndNot()? | |||
42080 | static SDValue | |||
42081 | combineVSelectWithAllOnesOrZeros(SDNode *N, SelectionDAG &DAG, | |||
42082 | TargetLowering::DAGCombinerInfo &DCI, | |||
42083 | const X86Subtarget &Subtarget) { | |||
42084 | SDValue Cond = N->getOperand(0); | |||
42085 | SDValue LHS = N->getOperand(1); | |||
42086 | SDValue RHS = N->getOperand(2); | |||
42087 | EVT VT = LHS.getValueType(); | |||
42088 | EVT CondVT = Cond.getValueType(); | |||
42089 | SDLoc DL(N); | |||
42090 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
42091 | ||||
42092 | if (N->getOpcode() != ISD::VSELECT) | |||
42093 | return SDValue(); | |||
42094 | ||||
42095 | assert(CondVT.isVector() && "Vector select expects a vector selector!")(static_cast <bool> (CondVT.isVector() && "Vector select expects a vector selector!" ) ? void (0) : __assert_fail ("CondVT.isVector() && \"Vector select expects a vector selector!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 42095, __extension__ __PRETTY_FUNCTION__)); | |||
42096 | ||||
42097 | // TODO: Use isNullOrNullSplat() to distinguish constants with undefs? | |||
42098 | // TODO: Can we assert that both operands are not zeros (because that should | |||
42099 | // get simplified at node creation time)? | |||
42100 | bool TValIsAllZeros = ISD::isBuildVectorAllZeros(LHS.getNode()); | |||
42101 | bool FValIsAllZeros = ISD::isBuildVectorAllZeros(RHS.getNode()); | |||
42102 | ||||
42103 | // If both inputs are 0/undef, create a complete zero vector. | |||
42104 | // FIXME: As noted above this should be handled by DAGCombiner/getNode. | |||
42105 | if (TValIsAllZeros && FValIsAllZeros) { | |||
42106 | if (VT.isFloatingPoint()) | |||
42107 | return DAG.getConstantFP(0.0, DL, VT); | |||
42108 | return DAG.getConstant(0, DL, VT); | |||
42109 | } | |||
42110 | ||||
42111 | // To use the condition operand as a bitwise mask, it must have elements that | |||
42112 | // are the same size as the select elements. Ie, the condition operand must | |||
42113 | // have already been promoted from the IR select condition type <N x i1>. | |||
42114 | // Don't check if the types themselves are equal because that excludes | |||
42115 | // vector floating-point selects. | |||
42116 | if (CondVT.getScalarSizeInBits() != VT.getScalarSizeInBits()) | |||
42117 | return SDValue(); | |||
42118 | ||||
42119 | // Try to invert the condition if true value is not all 1s and false value is | |||
42120 | // not all 0s. Only do this if the condition has one use. | |||
42121 | bool TValIsAllOnes = ISD::isBuildVectorAllOnes(LHS.getNode()); | |||
42122 | if (!TValIsAllOnes && !FValIsAllZeros && Cond.hasOneUse() && | |||
42123 | // Check if the selector will be produced by CMPP*/PCMP*. | |||
42124 | Cond.getOpcode() == ISD::SETCC && | |||
42125 | // Check if SETCC has already been promoted. | |||
42126 | TLI.getSetCCResultType(DAG.getDataLayout(), *DAG.getContext(), VT) == | |||
42127 | CondVT) { | |||
42128 | bool FValIsAllOnes = ISD::isBuildVectorAllOnes(RHS.getNode()); | |||
42129 | ||||
42130 | if (TValIsAllZeros || FValIsAllOnes) { | |||
42131 | SDValue CC = Cond.getOperand(2); | |||
42132 | ISD::CondCode NewCC = ISD::getSetCCInverse( | |||
42133 | cast<CondCodeSDNode>(CC)->get(), Cond.getOperand(0).getValueType()); | |||
42134 | Cond = DAG.getSetCC(DL, CondVT, Cond.getOperand(0), Cond.getOperand(1), | |||
42135 | NewCC); | |||
42136 | std::swap(LHS, RHS); | |||
42137 | TValIsAllOnes = FValIsAllOnes; | |||
42138 | FValIsAllZeros = TValIsAllZeros; | |||
42139 | } | |||
42140 | } | |||
42141 | ||||
42142 | // Cond value must be 'sign splat' to be converted to a logical op. | |||
42143 | if (DAG.ComputeNumSignBits(Cond) != CondVT.getScalarSizeInBits()) | |||
42144 | return SDValue(); | |||
42145 | ||||
42146 | // vselect Cond, 111..., 000... -> Cond | |||
42147 | if (TValIsAllOnes && FValIsAllZeros) | |||
42148 | return DAG.getBitcast(VT, Cond); | |||
42149 | ||||
42150 | if (!TLI.isTypeLegal(CondVT)) | |||
42151 | return SDValue(); | |||
42152 | ||||
42153 | // vselect Cond, 111..., X -> or Cond, X | |||
42154 | if (TValIsAllOnes) { | |||
42155 | SDValue CastRHS = DAG.getBitcast(CondVT, RHS); | |||
42156 | SDValue Or = DAG.getNode(ISD::OR, DL, CondVT, Cond, CastRHS); | |||
42157 | return DAG.getBitcast(VT, Or); | |||
42158 | } | |||
42159 | ||||
42160 | // vselect Cond, X, 000... -> and Cond, X | |||
42161 | if (FValIsAllZeros) { | |||
42162 | SDValue CastLHS = DAG.getBitcast(CondVT, LHS); | |||
42163 | SDValue And = DAG.getNode(ISD::AND, DL, CondVT, Cond, CastLHS); | |||
42164 | return DAG.getBitcast(VT, And); | |||
42165 | } | |||
42166 | ||||
42167 | // vselect Cond, 000..., X -> andn Cond, X | |||
42168 | if (TValIsAllZeros) { | |||
42169 | SDValue CastRHS = DAG.getBitcast(CondVT, RHS); | |||
42170 | SDValue AndN; | |||
42171 | // The canonical form differs for i1 vectors - x86andnp is not used | |||
42172 | if (CondVT.getScalarType() == MVT::i1) | |||
42173 | AndN = DAG.getNode(ISD::AND, DL, CondVT, DAG.getNOT(DL, Cond, CondVT), | |||
42174 | CastRHS); | |||
42175 | else | |||
42176 | AndN = DAG.getNode(X86ISD::ANDNP, DL, CondVT, Cond, CastRHS); | |||
42177 | return DAG.getBitcast(VT, AndN); | |||
42178 | } | |||
42179 | ||||
42180 | return SDValue(); | |||
42181 | } | |||
42182 | ||||
42183 | /// If both arms of a vector select are concatenated vectors, split the select, | |||
42184 | /// and concatenate the result to eliminate a wide (256-bit) vector instruction: | |||
42185 | /// vselect Cond, (concat T0, T1), (concat F0, F1) --> | |||
42186 | /// concat (vselect (split Cond), T0, F0), (vselect (split Cond), T1, F1) | |||
42187 | static SDValue narrowVectorSelect(SDNode *N, SelectionDAG &DAG, | |||
42188 | const X86Subtarget &Subtarget) { | |||
42189 | unsigned Opcode = N->getOpcode(); | |||
42190 | if (Opcode != X86ISD::BLENDV && Opcode != ISD::VSELECT) | |||
42191 | return SDValue(); | |||
42192 | ||||
42193 | // TODO: Split 512-bit vectors too? | |||
42194 | EVT VT = N->getValueType(0); | |||
42195 | if (!VT.is256BitVector()) | |||
42196 | return SDValue(); | |||
42197 | ||||
42198 | // TODO: Split as long as any 2 of the 3 operands are concatenated? | |||
42199 | SDValue Cond = N->getOperand(0); | |||
42200 | SDValue TVal = N->getOperand(1); | |||
42201 | SDValue FVal = N->getOperand(2); | |||
42202 | SmallVector<SDValue, 4> CatOpsT, CatOpsF; | |||
42203 | if (!TVal.hasOneUse() || !FVal.hasOneUse() || | |||
42204 | !collectConcatOps(TVal.getNode(), CatOpsT) || | |||
42205 | !collectConcatOps(FVal.getNode(), CatOpsF)) | |||
42206 | return SDValue(); | |||
42207 | ||||
42208 | auto makeBlend = [Opcode](SelectionDAG &DAG, const SDLoc &DL, | |||
42209 | ArrayRef<SDValue> Ops) { | |||
42210 | return DAG.getNode(Opcode, DL, Ops[1].getValueType(), Ops); | |||
42211 | }; | |||
42212 | return SplitOpsAndApply(DAG, Subtarget, SDLoc(N), VT, { Cond, TVal, FVal }, | |||
42213 | makeBlend, /*CheckBWI*/ false); | |||
42214 | } | |||
42215 | ||||
42216 | static SDValue combineSelectOfTwoConstants(SDNode *N, SelectionDAG &DAG) { | |||
42217 | SDValue Cond = N->getOperand(0); | |||
42218 | SDValue LHS = N->getOperand(1); | |||
42219 | SDValue RHS = N->getOperand(2); | |||
42220 | SDLoc DL(N); | |||
42221 | ||||
42222 | auto *TrueC = dyn_cast<ConstantSDNode>(LHS); | |||
42223 | auto *FalseC = dyn_cast<ConstantSDNode>(RHS); | |||
42224 | if (!TrueC || !FalseC) | |||
42225 | return SDValue(); | |||
42226 | ||||
42227 | // Don't do this for crazy integer types. | |||
42228 | EVT VT = N->getValueType(0); | |||
42229 | if (!DAG.getTargetLoweringInfo().isTypeLegal(VT)) | |||
42230 | return SDValue(); | |||
42231 | ||||
42232 | // We're going to use the condition bit in math or logic ops. We could allow | |||
42233 | // this with a wider condition value (post-legalization it becomes an i8), | |||
42234 | // but if nothing is creating selects that late, it doesn't matter. | |||
42235 | if (Cond.getValueType() != MVT::i1) | |||
42236 | return SDValue(); | |||
42237 | ||||
42238 | // A power-of-2 multiply is just a shift. LEA also cheaply handles multiply by | |||
42239 | // 3, 5, or 9 with i32/i64, so those get transformed too. | |||
42240 | // TODO: For constants that overflow or do not differ by power-of-2 or small | |||
42241 | // multiplier, convert to 'and' + 'add'. | |||
42242 | const APInt &TrueVal = TrueC->getAPIntValue(); | |||
42243 | const APInt &FalseVal = FalseC->getAPIntValue(); | |||
42244 | bool OV; | |||
42245 | APInt Diff = TrueVal.ssub_ov(FalseVal, OV); | |||
42246 | if (OV) | |||
42247 | return SDValue(); | |||
42248 | ||||
42249 | APInt AbsDiff = Diff.abs(); | |||
42250 | if (AbsDiff.isPowerOf2() || | |||
42251 | ((VT == MVT::i32 || VT == MVT::i64) && | |||
42252 | (AbsDiff == 3 || AbsDiff == 5 || AbsDiff == 9))) { | |||
42253 | ||||
42254 | // We need a positive multiplier constant for shift/LEA codegen. The 'not' | |||
42255 | // of the condition can usually be folded into a compare predicate, but even | |||
42256 | // without that, the sequence should be cheaper than a CMOV alternative. | |||
42257 | if (TrueVal.slt(FalseVal)) { | |||
42258 | Cond = DAG.getNOT(DL, Cond, MVT::i1); | |||
42259 | std::swap(TrueC, FalseC); | |||
42260 | } | |||
42261 | ||||
42262 | // select Cond, TC, FC --> (zext(Cond) * (TC - FC)) + FC | |||
42263 | SDValue R = DAG.getNode(ISD::ZERO_EXTEND, DL, VT, Cond); | |||
42264 | ||||
42265 | // Multiply condition by the difference if non-one. | |||
42266 | if (!AbsDiff.isOneValue()) | |||
42267 | R = DAG.getNode(ISD::MUL, DL, VT, R, DAG.getConstant(AbsDiff, DL, VT)); | |||
42268 | ||||
42269 | // Add the base if non-zero. | |||
42270 | if (!FalseC->isNullValue()) | |||
42271 | R = DAG.getNode(ISD::ADD, DL, VT, R, SDValue(FalseC, 0)); | |||
42272 | ||||
42273 | return R; | |||
42274 | } | |||
42275 | ||||
42276 | return SDValue(); | |||
42277 | } | |||
42278 | ||||
42279 | /// If this is a *dynamic* select (non-constant condition) and we can match | |||
42280 | /// this node with one of the variable blend instructions, restructure the | |||
42281 | /// condition so that blends can use the high (sign) bit of each element. | |||
42282 | /// This function will also call SimplifyDemandedBits on already created | |||
42283 | /// BLENDV to perform additional simplifications. | |||
42284 | static SDValue combineVSelectToBLENDV(SDNode *N, SelectionDAG &DAG, | |||
42285 | TargetLowering::DAGCombinerInfo &DCI, | |||
42286 | const X86Subtarget &Subtarget) { | |||
42287 | SDValue Cond = N->getOperand(0); | |||
42288 | if ((N->getOpcode() != ISD::VSELECT && | |||
42289 | N->getOpcode() != X86ISD::BLENDV) || | |||
42290 | ISD::isBuildVectorOfConstantSDNodes(Cond.getNode())) | |||
42291 | return SDValue(); | |||
42292 | ||||
42293 | // Don't optimize before the condition has been transformed to a legal type | |||
42294 | // and don't ever optimize vector selects that map to AVX512 mask-registers. | |||
42295 | unsigned BitWidth = Cond.getScalarValueSizeInBits(); | |||
42296 | if (BitWidth < 8 || BitWidth > 64) | |||
42297 | return SDValue(); | |||
42298 | ||||
42299 | // We can only handle the cases where VSELECT is directly legal on the | |||
42300 | // subtarget. We custom lower VSELECT nodes with constant conditions and | |||
42301 | // this makes it hard to see whether a dynamic VSELECT will correctly | |||
42302 | // lower, so we both check the operation's status and explicitly handle the | |||
42303 | // cases where a *dynamic* blend will fail even though a constant-condition | |||
42304 | // blend could be custom lowered. | |||
42305 | // FIXME: We should find a better way to handle this class of problems. | |||
42306 | // Potentially, we should combine constant-condition vselect nodes | |||
42307 | // pre-legalization into shuffles and not mark as many types as custom | |||
42308 | // lowered. | |||
42309 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
42310 | EVT VT = N->getValueType(0); | |||
42311 | if (!TLI.isOperationLegalOrCustom(ISD::VSELECT, VT)) | |||
42312 | return SDValue(); | |||
42313 | // FIXME: We don't support i16-element blends currently. We could and | |||
42314 | // should support them by making *all* the bits in the condition be set | |||
42315 | // rather than just the high bit and using an i8-element blend. | |||
42316 | if (VT.getVectorElementType() == MVT::i16) | |||
42317 | return SDValue(); | |||
42318 | // Dynamic blending was only available from SSE4.1 onward. | |||
42319 | if (VT.is128BitVector() && !Subtarget.hasSSE41()) | |||
42320 | return SDValue(); | |||
42321 | // Byte blends are only available in AVX2 | |||
42322 | if (VT == MVT::v32i8 && !Subtarget.hasAVX2()) | |||
42323 | return SDValue(); | |||
42324 | // There are no 512-bit blend instructions that use sign bits. | |||
42325 | if (VT.is512BitVector()) | |||
42326 | return SDValue(); | |||
42327 | ||||
42328 | auto OnlyUsedAsSelectCond = [](SDValue Cond) { | |||
42329 | for (SDNode::use_iterator UI = Cond->use_begin(), UE = Cond->use_end(); | |||
42330 | UI != UE; ++UI) | |||
42331 | if ((UI->getOpcode() != ISD::VSELECT && | |||
42332 | UI->getOpcode() != X86ISD::BLENDV) || | |||
42333 | UI.getOperandNo() != 0) | |||
42334 | return false; | |||
42335 | ||||
42336 | return true; | |||
42337 | }; | |||
42338 | ||||
42339 | APInt DemandedBits(APInt::getSignMask(BitWidth)); | |||
42340 | ||||
42341 | if (OnlyUsedAsSelectCond(Cond)) { | |||
42342 | KnownBits Known; | |||
42343 | TargetLowering::TargetLoweringOpt TLO(DAG, !DCI.isBeforeLegalize(), | |||
42344 | !DCI.isBeforeLegalizeOps()); | |||
42345 | if (!TLI.SimplifyDemandedBits(Cond, DemandedBits, Known, TLO, 0, true)) | |||
42346 | return SDValue(); | |||
42347 | ||||
42348 | // If we changed the computation somewhere in the DAG, this change will | |||
42349 | // affect all users of Cond. Update all the nodes so that we do not use | |||
42350 | // the generic VSELECT anymore. Otherwise, we may perform wrong | |||
42351 | // optimizations as we messed with the actual expectation for the vector | |||
42352 | // boolean values. | |||
42353 | for (SDNode *U : Cond->uses()) { | |||
42354 | if (U->getOpcode() == X86ISD::BLENDV) | |||
42355 | continue; | |||
42356 | ||||
42357 | SDValue SB = DAG.getNode(X86ISD::BLENDV, SDLoc(U), U->getValueType(0), | |||
42358 | Cond, U->getOperand(1), U->getOperand(2)); | |||
42359 | DAG.ReplaceAllUsesOfValueWith(SDValue(U, 0), SB); | |||
42360 | DCI.AddToWorklist(U); | |||
42361 | } | |||
42362 | DCI.CommitTargetLoweringOpt(TLO); | |||
42363 | return SDValue(N, 0); | |||
42364 | } | |||
42365 | ||||
42366 | // Otherwise we can still at least try to simplify multiple use bits. | |||
42367 | if (SDValue V = TLI.SimplifyMultipleUseDemandedBits(Cond, DemandedBits, DAG)) | |||
42368 | return DAG.getNode(X86ISD::BLENDV, SDLoc(N), N->getValueType(0), V, | |||
42369 | N->getOperand(1), N->getOperand(2)); | |||
42370 | ||||
42371 | return SDValue(); | |||
42372 | } | |||
42373 | ||||
42374 | // Try to match: | |||
42375 | // (or (and (M, (sub 0, X)), (pandn M, X))) | |||
42376 | // which is a special case of: | |||
42377 | // (select M, (sub 0, X), X) | |||
42378 | // Per: | |||
42379 | // http://graphics.stanford.edu/~seander/bithacks.html#ConditionalNegate | |||
42380 | // We know that, if fNegate is 0 or 1: | |||
42381 | // (fNegate ? -v : v) == ((v ^ -fNegate) + fNegate) | |||
42382 | // | |||
42383 | // Here, we have a mask, M (all 1s or 0), and, similarly, we know that: | |||
42384 | // ((M & 1) ? -X : X) == ((X ^ -(M & 1)) + (M & 1)) | |||
42385 | // ( M ? -X : X) == ((X ^ M ) + (M & 1)) | |||
42386 | // This lets us transform our vselect to: | |||
42387 | // (add (xor X, M), (and M, 1)) | |||
42388 | // And further to: | |||
42389 | // (sub (xor X, M), M) | |||
42390 | static SDValue combineLogicBlendIntoConditionalNegate( | |||
42391 | EVT VT, SDValue Mask, SDValue X, SDValue Y, const SDLoc &DL, | |||
42392 | SelectionDAG &DAG, const X86Subtarget &Subtarget) { | |||
42393 | EVT MaskVT = Mask.getValueType(); | |||
42394 | assert(MaskVT.isInteger() &&(static_cast <bool> (MaskVT.isInteger() && DAG. ComputeNumSignBits(Mask) == MaskVT.getScalarSizeInBits() && "Mask must be zero/all-bits") ? void (0) : __assert_fail ("MaskVT.isInteger() && DAG.ComputeNumSignBits(Mask) == MaskVT.getScalarSizeInBits() && \"Mask must be zero/all-bits\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 42396, __extension__ __PRETTY_FUNCTION__)) | |||
42395 | DAG.ComputeNumSignBits(Mask) == MaskVT.getScalarSizeInBits() &&(static_cast <bool> (MaskVT.isInteger() && DAG. ComputeNumSignBits(Mask) == MaskVT.getScalarSizeInBits() && "Mask must be zero/all-bits") ? void (0) : __assert_fail ("MaskVT.isInteger() && DAG.ComputeNumSignBits(Mask) == MaskVT.getScalarSizeInBits() && \"Mask must be zero/all-bits\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 42396, __extension__ __PRETTY_FUNCTION__)) | |||
42396 | "Mask must be zero/all-bits")(static_cast <bool> (MaskVT.isInteger() && DAG. ComputeNumSignBits(Mask) == MaskVT.getScalarSizeInBits() && "Mask must be zero/all-bits") ? void (0) : __assert_fail ("MaskVT.isInteger() && DAG.ComputeNumSignBits(Mask) == MaskVT.getScalarSizeInBits() && \"Mask must be zero/all-bits\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 42396, __extension__ __PRETTY_FUNCTION__)); | |||
42397 | ||||
42398 | if (X.getValueType() != MaskVT || Y.getValueType() != MaskVT) | |||
42399 | return SDValue(); | |||
42400 | if (!DAG.getTargetLoweringInfo().isOperationLegal(ISD::SUB, MaskVT)) | |||
42401 | return SDValue(); | |||
42402 | ||||
42403 | auto IsNegV = [](SDNode *N, SDValue V) { | |||
42404 | return N->getOpcode() == ISD::SUB && N->getOperand(1) == V && | |||
42405 | ISD::isBuildVectorAllZeros(N->getOperand(0).getNode()); | |||
42406 | }; | |||
42407 | ||||
42408 | SDValue V; | |||
42409 | if (IsNegV(Y.getNode(), X)) | |||
42410 | V = X; | |||
42411 | else if (IsNegV(X.getNode(), Y)) | |||
42412 | V = Y; | |||
42413 | else | |||
42414 | return SDValue(); | |||
42415 | ||||
42416 | SDValue SubOp1 = DAG.getNode(ISD::XOR, DL, MaskVT, V, Mask); | |||
42417 | SDValue SubOp2 = Mask; | |||
42418 | ||||
42419 | // If the negate was on the false side of the select, then | |||
42420 | // the operands of the SUB need to be swapped. PR 27251. | |||
42421 | // This is because the pattern being matched above is | |||
42422 | // (vselect M, (sub (0, X), X) -> (sub (xor X, M), M) | |||
42423 | // but if the pattern matched was | |||
42424 | // (vselect M, X, (sub (0, X))), that is really negation of the pattern | |||
42425 | // above, -(vselect M, (sub 0, X), X), and therefore the replacement | |||
42426 | // pattern also needs to be a negation of the replacement pattern above. | |||
42427 | // And -(sub X, Y) is just sub (Y, X), so swapping the operands of the | |||
42428 | // sub accomplishes the negation of the replacement pattern. | |||
42429 | if (V == Y) | |||
42430 | std::swap(SubOp1, SubOp2); | |||
42431 | ||||
42432 | SDValue Res = DAG.getNode(ISD::SUB, DL, MaskVT, SubOp1, SubOp2); | |||
42433 | return DAG.getBitcast(VT, Res); | |||
42434 | } | |||
42435 | ||||
42436 | /// Do target-specific dag combines on SELECT and VSELECT nodes. | |||
42437 | static SDValue combineSelect(SDNode *N, SelectionDAG &DAG, | |||
42438 | TargetLowering::DAGCombinerInfo &DCI, | |||
42439 | const X86Subtarget &Subtarget) { | |||
42440 | SDLoc DL(N); | |||
42441 | SDValue Cond = N->getOperand(0); | |||
42442 | SDValue LHS = N->getOperand(1); | |||
42443 | SDValue RHS = N->getOperand(2); | |||
42444 | ||||
42445 | // Try simplification again because we use this function to optimize | |||
42446 | // BLENDV nodes that are not handled by the generic combiner. | |||
42447 | if (SDValue V = DAG.simplifySelect(Cond, LHS, RHS)) | |||
42448 | return V; | |||
42449 | ||||
42450 | EVT VT = LHS.getValueType(); | |||
42451 | EVT CondVT = Cond.getValueType(); | |||
42452 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
42453 | bool CondConstantVector = ISD::isBuildVectorOfConstantSDNodes(Cond.getNode()); | |||
42454 | ||||
42455 | // Attempt to combine (select M, (sub 0, X), X) -> (sub (xor X, M), M). | |||
42456 | // Limit this to cases of non-constant masks that createShuffleMaskFromVSELECT | |||
42457 | // can't catch, plus vXi8 cases where we'd likely end up with BLENDV. | |||
42458 | if (CondVT.isVector() && CondVT.isInteger() && | |||
42459 | CondVT.getScalarSizeInBits() == VT.getScalarSizeInBits() && | |||
42460 | (!CondConstantVector || CondVT.getScalarType() == MVT::i8) && | |||
42461 | DAG.ComputeNumSignBits(Cond) == CondVT.getScalarSizeInBits()) | |||
42462 | if (SDValue V = combineLogicBlendIntoConditionalNegate(VT, Cond, RHS, LHS, | |||
42463 | DL, DAG, Subtarget)) | |||
42464 | return V; | |||
42465 | ||||
42466 | // Convert vselects with constant condition into shuffles. | |||
42467 | if (CondConstantVector && DCI.isBeforeLegalizeOps()) { | |||
42468 | SmallVector<int, 64> Mask; | |||
42469 | if (createShuffleMaskFromVSELECT(Mask, Cond)) | |||
42470 | return DAG.getVectorShuffle(VT, DL, LHS, RHS, Mask); | |||
42471 | } | |||
42472 | ||||
42473 | // fold vselect(cond, pshufb(x), pshufb(y)) -> or (pshufb(x), pshufb(y)) | |||
42474 | // by forcing the unselected elements to zero. | |||
42475 | // TODO: Can we handle more shuffles with this? | |||
42476 | if (N->getOpcode() == ISD::VSELECT && CondVT.isVector() && | |||
42477 | LHS.getOpcode() == X86ISD::PSHUFB && RHS.getOpcode() == X86ISD::PSHUFB && | |||
42478 | LHS.hasOneUse() && RHS.hasOneUse()) { | |||
42479 | MVT SimpleVT = VT.getSimpleVT(); | |||
42480 | SmallVector<SDValue, 1> LHSOps, RHSOps; | |||
42481 | SmallVector<int, 64> LHSMask, RHSMask, CondMask; | |||
42482 | if (createShuffleMaskFromVSELECT(CondMask, Cond) && | |||
42483 | getTargetShuffleMask(LHS.getNode(), SimpleVT, true, LHSOps, LHSMask) && | |||
42484 | getTargetShuffleMask(RHS.getNode(), SimpleVT, true, RHSOps, RHSMask)) { | |||
42485 | int NumElts = VT.getVectorNumElements(); | |||
42486 | for (int i = 0; i != NumElts; ++i) { | |||
42487 | if (CondMask[i] < NumElts) | |||
42488 | RHSMask[i] = 0x80; | |||
42489 | else | |||
42490 | LHSMask[i] = 0x80; | |||
42491 | } | |||
42492 | LHS = DAG.getNode(X86ISD::PSHUFB, DL, VT, LHS.getOperand(0), | |||
42493 | getConstVector(LHSMask, SimpleVT, DAG, DL, true)); | |||
42494 | RHS = DAG.getNode(X86ISD::PSHUFB, DL, VT, RHS.getOperand(0), | |||
42495 | getConstVector(RHSMask, SimpleVT, DAG, DL, true)); | |||
42496 | return DAG.getNode(ISD::OR, DL, VT, LHS, RHS); | |||
42497 | } | |||
42498 | } | |||
42499 | ||||
42500 | // If we have SSE[12] support, try to form min/max nodes. SSE min/max | |||
42501 | // instructions match the semantics of the common C idiom x<y?x:y but not | |||
42502 | // x<=y?x:y, because of how they handle negative zero (which can be | |||
42503 | // ignored in unsafe-math mode). | |||
42504 | // We also try to create v2f32 min/max nodes, which we later widen to v4f32. | |||
42505 | if (Cond.getOpcode() == ISD::SETCC && VT.isFloatingPoint() && | |||
42506 | VT != MVT::f80 && VT != MVT::f128 && | |||
42507 | (TLI.isTypeLegal(VT) || VT == MVT::v2f32) && | |||
42508 | (Subtarget.hasSSE2() || | |||
42509 | (Subtarget.hasSSE1() && VT.getScalarType() == MVT::f32))) { | |||
42510 | ISD::CondCode CC = cast<CondCodeSDNode>(Cond.getOperand(2))->get(); | |||
42511 | ||||
42512 | unsigned Opcode = 0; | |||
42513 | // Check for x CC y ? x : y. | |||
42514 | if (DAG.isEqualTo(LHS, Cond.getOperand(0)) && | |||
42515 | DAG.isEqualTo(RHS, Cond.getOperand(1))) { | |||
42516 | switch (CC) { | |||
42517 | default: break; | |||
42518 | case ISD::SETULT: | |||
42519 | // Converting this to a min would handle NaNs incorrectly, and swapping | |||
42520 | // the operands would cause it to handle comparisons between positive | |||
42521 | // and negative zero incorrectly. | |||
42522 | if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS)) { | |||
42523 | if (!DAG.getTarget().Options.NoSignedZerosFPMath && | |||
42524 | !(DAG.isKnownNeverZeroFloat(LHS) || | |||
42525 | DAG.isKnownNeverZeroFloat(RHS))) | |||
42526 | break; | |||
42527 | std::swap(LHS, RHS); | |||
42528 | } | |||
42529 | Opcode = X86ISD::FMIN; | |||
42530 | break; | |||
42531 | case ISD::SETOLE: | |||
42532 | // Converting this to a min would handle comparisons between positive | |||
42533 | // and negative zero incorrectly. | |||
42534 | if (!DAG.getTarget().Options.NoSignedZerosFPMath && | |||
42535 | !DAG.isKnownNeverZeroFloat(LHS) && !DAG.isKnownNeverZeroFloat(RHS)) | |||
42536 | break; | |||
42537 | Opcode = X86ISD::FMIN; | |||
42538 | break; | |||
42539 | case ISD::SETULE: | |||
42540 | // Converting this to a min would handle both negative zeros and NaNs | |||
42541 | // incorrectly, but we can swap the operands to fix both. | |||
42542 | std::swap(LHS, RHS); | |||
42543 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
42544 | case ISD::SETOLT: | |||
42545 | case ISD::SETLT: | |||
42546 | case ISD::SETLE: | |||
42547 | Opcode = X86ISD::FMIN; | |||
42548 | break; | |||
42549 | ||||
42550 | case ISD::SETOGE: | |||
42551 | // Converting this to a max would handle comparisons between positive | |||
42552 | // and negative zero incorrectly. | |||
42553 | if (!DAG.getTarget().Options.NoSignedZerosFPMath && | |||
42554 | !DAG.isKnownNeverZeroFloat(LHS) && !DAG.isKnownNeverZeroFloat(RHS)) | |||
42555 | break; | |||
42556 | Opcode = X86ISD::FMAX; | |||
42557 | break; | |||
42558 | case ISD::SETUGT: | |||
42559 | // Converting this to a max would handle NaNs incorrectly, and swapping | |||
42560 | // the operands would cause it to handle comparisons between positive | |||
42561 | // and negative zero incorrectly. | |||
42562 | if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS)) { | |||
42563 | if (!DAG.getTarget().Options.NoSignedZerosFPMath && | |||
42564 | !(DAG.isKnownNeverZeroFloat(LHS) || | |||
42565 | DAG.isKnownNeverZeroFloat(RHS))) | |||
42566 | break; | |||
42567 | std::swap(LHS, RHS); | |||
42568 | } | |||
42569 | Opcode = X86ISD::FMAX; | |||
42570 | break; | |||
42571 | case ISD::SETUGE: | |||
42572 | // Converting this to a max would handle both negative zeros and NaNs | |||
42573 | // incorrectly, but we can swap the operands to fix both. | |||
42574 | std::swap(LHS, RHS); | |||
42575 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
42576 | case ISD::SETOGT: | |||
42577 | case ISD::SETGT: | |||
42578 | case ISD::SETGE: | |||
42579 | Opcode = X86ISD::FMAX; | |||
42580 | break; | |||
42581 | } | |||
42582 | // Check for x CC y ? y : x -- a min/max with reversed arms. | |||
42583 | } else if (DAG.isEqualTo(LHS, Cond.getOperand(1)) && | |||
42584 | DAG.isEqualTo(RHS, Cond.getOperand(0))) { | |||
42585 | switch (CC) { | |||
42586 | default: break; | |||
42587 | case ISD::SETOGE: | |||
42588 | // Converting this to a min would handle comparisons between positive | |||
42589 | // and negative zero incorrectly, and swapping the operands would | |||
42590 | // cause it to handle NaNs incorrectly. | |||
42591 | if (!DAG.getTarget().Options.NoSignedZerosFPMath && | |||
42592 | !(DAG.isKnownNeverZeroFloat(LHS) || | |||
42593 | DAG.isKnownNeverZeroFloat(RHS))) { | |||
42594 | if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS)) | |||
42595 | break; | |||
42596 | std::swap(LHS, RHS); | |||
42597 | } | |||
42598 | Opcode = X86ISD::FMIN; | |||
42599 | break; | |||
42600 | case ISD::SETUGT: | |||
42601 | // Converting this to a min would handle NaNs incorrectly. | |||
42602 | if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS)) | |||
42603 | break; | |||
42604 | Opcode = X86ISD::FMIN; | |||
42605 | break; | |||
42606 | case ISD::SETUGE: | |||
42607 | // Converting this to a min would handle both negative zeros and NaNs | |||
42608 | // incorrectly, but we can swap the operands to fix both. | |||
42609 | std::swap(LHS, RHS); | |||
42610 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
42611 | case ISD::SETOGT: | |||
42612 | case ISD::SETGT: | |||
42613 | case ISD::SETGE: | |||
42614 | Opcode = X86ISD::FMIN; | |||
42615 | break; | |||
42616 | ||||
42617 | case ISD::SETULT: | |||
42618 | // Converting this to a max would handle NaNs incorrectly. | |||
42619 | if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS)) | |||
42620 | break; | |||
42621 | Opcode = X86ISD::FMAX; | |||
42622 | break; | |||
42623 | case ISD::SETOLE: | |||
42624 | // Converting this to a max would handle comparisons between positive | |||
42625 | // and negative zero incorrectly, and swapping the operands would | |||
42626 | // cause it to handle NaNs incorrectly. | |||
42627 | if (!DAG.getTarget().Options.NoSignedZerosFPMath && | |||
42628 | !DAG.isKnownNeverZeroFloat(LHS) && | |||
42629 | !DAG.isKnownNeverZeroFloat(RHS)) { | |||
42630 | if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS)) | |||
42631 | break; | |||
42632 | std::swap(LHS, RHS); | |||
42633 | } | |||
42634 | Opcode = X86ISD::FMAX; | |||
42635 | break; | |||
42636 | case ISD::SETULE: | |||
42637 | // Converting this to a max would handle both negative zeros and NaNs | |||
42638 | // incorrectly, but we can swap the operands to fix both. | |||
42639 | std::swap(LHS, RHS); | |||
42640 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
42641 | case ISD::SETOLT: | |||
42642 | case ISD::SETLT: | |||
42643 | case ISD::SETLE: | |||
42644 | Opcode = X86ISD::FMAX; | |||
42645 | break; | |||
42646 | } | |||
42647 | } | |||
42648 | ||||
42649 | if (Opcode) | |||
42650 | return DAG.getNode(Opcode, DL, N->getValueType(0), LHS, RHS); | |||
42651 | } | |||
42652 | ||||
42653 | // Some mask scalar intrinsics rely on checking if only one bit is set | |||
42654 | // and implement it in C code like this: | |||
42655 | // A[0] = (U & 1) ? A[0] : W[0]; | |||
42656 | // This creates some redundant instructions that break pattern matching. | |||
42657 | // fold (select (setcc (and (X, 1), 0, seteq), Y, Z)) -> select(and(X, 1),Z,Y) | |||
42658 | if (Subtarget.hasAVX512() && N->getOpcode() == ISD::SELECT && | |||
42659 | Cond.getOpcode() == ISD::SETCC && (VT == MVT::f32 || VT == MVT::f64)) { | |||
42660 | ISD::CondCode CC = cast<CondCodeSDNode>(Cond.getOperand(2))->get(); | |||
42661 | SDValue AndNode = Cond.getOperand(0); | |||
42662 | if (AndNode.getOpcode() == ISD::AND && CC == ISD::SETEQ && | |||
42663 | isNullConstant(Cond.getOperand(1)) && | |||
42664 | isOneConstant(AndNode.getOperand(1))) { | |||
42665 | // LHS and RHS swapped due to | |||
42666 | // setcc outputting 1 when AND resulted in 0 and vice versa. | |||
42667 | AndNode = DAG.getZExtOrTrunc(AndNode, DL, MVT::i8); | |||
42668 | return DAG.getNode(ISD::SELECT, DL, VT, AndNode, RHS, LHS); | |||
42669 | } | |||
42670 | } | |||
42671 | ||||
42672 | // v16i8 (select v16i1, v16i8, v16i8) does not have a proper | |||
42673 | // lowering on KNL. In this case we convert it to | |||
42674 | // v16i8 (select v16i8, v16i8, v16i8) and use AVX instruction. | |||
42675 | // The same situation all vectors of i8 and i16 without BWI. | |||
42676 | // Make sure we extend these even before type legalization gets a chance to | |||
42677 | // split wide vectors. | |||
42678 | // Since SKX these selects have a proper lowering. | |||
42679 | if (Subtarget.hasAVX512() && !Subtarget.hasBWI() && CondVT.isVector() && | |||
42680 | CondVT.getVectorElementType() == MVT::i1 && | |||
42681 | (VT.getVectorElementType() == MVT::i8 || | |||
42682 | VT.getVectorElementType() == MVT::i16)) { | |||
42683 | Cond = DAG.getNode(ISD::SIGN_EXTEND, DL, VT, Cond); | |||
42684 | return DAG.getNode(N->getOpcode(), DL, VT, Cond, LHS, RHS); | |||
42685 | } | |||
42686 | ||||
42687 | // AVX512 - Extend select with zero to merge with target shuffle. | |||
42688 | // select(mask, extract_subvector(shuffle(x)), zero) --> | |||
42689 | // extract_subvector(select(insert_subvector(mask), shuffle(x), zero)) | |||
42690 | // TODO - support non target shuffles as well. | |||
42691 | if (Subtarget.hasAVX512() && CondVT.isVector() && | |||
42692 | CondVT.getVectorElementType() == MVT::i1) { | |||
42693 | auto SelectableOp = [&TLI](SDValue Op) { | |||
42694 | return Op.getOpcode() == ISD::EXTRACT_SUBVECTOR && | |||
42695 | isTargetShuffle(Op.getOperand(0).getOpcode()) && | |||
42696 | isNullConstant(Op.getOperand(1)) && | |||
42697 | TLI.isTypeLegal(Op.getOperand(0).getValueType()) && | |||
42698 | Op.hasOneUse() && Op.getOperand(0).hasOneUse(); | |||
42699 | }; | |||
42700 | ||||
42701 | bool SelectableLHS = SelectableOp(LHS); | |||
42702 | bool SelectableRHS = SelectableOp(RHS); | |||
42703 | bool ZeroLHS = ISD::isBuildVectorAllZeros(LHS.getNode()); | |||
42704 | bool ZeroRHS = ISD::isBuildVectorAllZeros(RHS.getNode()); | |||
42705 | ||||
42706 | if ((SelectableLHS && ZeroRHS) || (SelectableRHS && ZeroLHS)) { | |||
42707 | EVT SrcVT = SelectableLHS ? LHS.getOperand(0).getValueType() | |||
42708 | : RHS.getOperand(0).getValueType(); | |||
42709 | EVT SrcCondVT = SrcVT.changeVectorElementType(MVT::i1); | |||
42710 | LHS = insertSubVector(DAG.getUNDEF(SrcVT), LHS, 0, DAG, DL, | |||
42711 | VT.getSizeInBits()); | |||
42712 | RHS = insertSubVector(DAG.getUNDEF(SrcVT), RHS, 0, DAG, DL, | |||
42713 | VT.getSizeInBits()); | |||
42714 | Cond = DAG.getNode(ISD::INSERT_SUBVECTOR, DL, SrcCondVT, | |||
42715 | DAG.getUNDEF(SrcCondVT), Cond, | |||
42716 | DAG.getIntPtrConstant(0, DL)); | |||
42717 | SDValue Res = DAG.getSelect(DL, SrcVT, Cond, LHS, RHS); | |||
42718 | return extractSubVector(Res, 0, DAG, DL, VT.getSizeInBits()); | |||
42719 | } | |||
42720 | } | |||
42721 | ||||
42722 | if (SDValue V = combineSelectOfTwoConstants(N, DAG)) | |||
42723 | return V; | |||
42724 | ||||
42725 | if (N->getOpcode() == ISD::SELECT && Cond.getOpcode() == ISD::SETCC && | |||
42726 | Cond.hasOneUse()) { | |||
42727 | EVT CondVT = Cond.getValueType(); | |||
42728 | SDValue Cond0 = Cond.getOperand(0); | |||
42729 | SDValue Cond1 = Cond.getOperand(1); | |||
42730 | ISD::CondCode CC = cast<CondCodeSDNode>(Cond.getOperand(2))->get(); | |||
42731 | ||||
42732 | // Canonicalize min/max: | |||
42733 | // (x > 0) ? x : 0 -> (x >= 0) ? x : 0 | |||
42734 | // (x < -1) ? x : -1 -> (x <= -1) ? x : -1 | |||
42735 | // This allows use of COND_S / COND_NS (see TranslateX86CC) which eliminates | |||
42736 | // the need for an extra compare against zero. e.g. | |||
42737 | // (a - b) > 0 : (a - b) ? 0 -> (a - b) >= 0 : (a - b) ? 0 | |||
42738 | // subl %esi, %edi | |||
42739 | // testl %edi, %edi | |||
42740 | // movl $0, %eax | |||
42741 | // cmovgl %edi, %eax | |||
42742 | // => | |||
42743 | // xorl %eax, %eax | |||
42744 | // subl %esi, $edi | |||
42745 | // cmovsl %eax, %edi | |||
42746 | // | |||
42747 | // We can also canonicalize | |||
42748 | // (x s> 1) ? x : 1 -> (x s>= 1) ? x : 1 -> (x s> 0) ? x : 1 | |||
42749 | // (x u> 1) ? x : 1 -> (x u>= 1) ? x : 1 -> (x != 0) ? x : 1 | |||
42750 | // This allows the use of a test instruction for the compare. | |||
42751 | if (LHS == Cond0 && RHS == Cond1) { | |||
42752 | if ((CC == ISD::SETGT && (isNullConstant(RHS) || isOneConstant(RHS))) || | |||
42753 | (CC == ISD::SETLT && isAllOnesConstant(RHS))) { | |||
42754 | ISD::CondCode NewCC = CC == ISD::SETGT ? ISD::SETGE : ISD::SETLE; | |||
42755 | Cond = DAG.getSetCC(SDLoc(Cond), CondVT, Cond0, Cond1, NewCC); | |||
42756 | return DAG.getSelect(DL, VT, Cond, LHS, RHS); | |||
42757 | } | |||
42758 | if (CC == ISD::SETUGT && isOneConstant(RHS)) { | |||
42759 | ISD::CondCode NewCC = ISD::SETUGE; | |||
42760 | Cond = DAG.getSetCC(SDLoc(Cond), CondVT, Cond0, Cond1, NewCC); | |||
42761 | return DAG.getSelect(DL, VT, Cond, LHS, RHS); | |||
42762 | } | |||
42763 | } | |||
42764 | ||||
42765 | // Similar to DAGCombine's select(or(CC0,CC1),X,Y) fold but for legal types. | |||
42766 | // fold eq + gt/lt nested selects into ge/le selects | |||
42767 | // select (cmpeq Cond0, Cond1), LHS, (select (cmpugt Cond0, Cond1), LHS, Y) | |||
42768 | // --> (select (cmpuge Cond0, Cond1), LHS, Y) | |||
42769 | // select (cmpslt Cond0, Cond1), LHS, (select (cmpeq Cond0, Cond1), LHS, Y) | |||
42770 | // --> (select (cmpsle Cond0, Cond1), LHS, Y) | |||
42771 | // .. etc .. | |||
42772 | if (RHS.getOpcode() == ISD::SELECT && RHS.getOperand(1) == LHS && | |||
42773 | RHS.getOperand(0).getOpcode() == ISD::SETCC) { | |||
42774 | SDValue InnerSetCC = RHS.getOperand(0); | |||
42775 | ISD::CondCode InnerCC = | |||
42776 | cast<CondCodeSDNode>(InnerSetCC.getOperand(2))->get(); | |||
42777 | if ((CC == ISD::SETEQ || InnerCC == ISD::SETEQ) && | |||
42778 | Cond0 == InnerSetCC.getOperand(0) && | |||
42779 | Cond1 == InnerSetCC.getOperand(1)) { | |||
42780 | ISD::CondCode NewCC; | |||
42781 | switch (CC == ISD::SETEQ ? InnerCC : CC) { | |||
42782 | case ISD::SETGT: NewCC = ISD::SETGE; break; | |||
42783 | case ISD::SETLT: NewCC = ISD::SETLE; break; | |||
42784 | case ISD::SETUGT: NewCC = ISD::SETUGE; break; | |||
42785 | case ISD::SETULT: NewCC = ISD::SETULE; break; | |||
42786 | default: NewCC = ISD::SETCC_INVALID; break; | |||
42787 | } | |||
42788 | if (NewCC != ISD::SETCC_INVALID) { | |||
42789 | Cond = DAG.getSetCC(DL, CondVT, Cond0, Cond1, NewCC); | |||
42790 | return DAG.getSelect(DL, VT, Cond, LHS, RHS.getOperand(2)); | |||
42791 | } | |||
42792 | } | |||
42793 | } | |||
42794 | } | |||
42795 | ||||
42796 | // Check if the first operand is all zeros and Cond type is vXi1. | |||
42797 | // If this an avx512 target we can improve the use of zero masking by | |||
42798 | // swapping the operands and inverting the condition. | |||
42799 | if (N->getOpcode() == ISD::VSELECT && Cond.hasOneUse() && | |||
42800 | Subtarget.hasAVX512() && CondVT.getVectorElementType() == MVT::i1 && | |||
42801 | ISD::isBuildVectorAllZeros(LHS.getNode()) && | |||
42802 | !ISD::isBuildVectorAllZeros(RHS.getNode())) { | |||
42803 | // Invert the cond to not(cond) : xor(op,allones)=not(op) | |||
42804 | SDValue CondNew = DAG.getNOT(DL, Cond, CondVT); | |||
42805 | // Vselect cond, op1, op2 = Vselect not(cond), op2, op1 | |||
42806 | return DAG.getSelect(DL, VT, CondNew, RHS, LHS); | |||
42807 | } | |||
42808 | ||||
42809 | // Early exit check | |||
42810 | if (!TLI.isTypeLegal(VT)) | |||
42811 | return SDValue(); | |||
42812 | ||||
42813 | if (SDValue V = combineVSelectWithAllOnesOrZeros(N, DAG, DCI, Subtarget)) | |||
42814 | return V; | |||
42815 | ||||
42816 | if (SDValue V = combineVSelectToBLENDV(N, DAG, DCI, Subtarget)) | |||
42817 | return V; | |||
42818 | ||||
42819 | if (SDValue V = narrowVectorSelect(N, DAG, Subtarget)) | |||
42820 | return V; | |||
42821 | ||||
42822 | // select(~Cond, X, Y) -> select(Cond, Y, X) | |||
42823 | if (CondVT.getScalarType() != MVT::i1) { | |||
42824 | if (SDValue CondNot = IsNOT(Cond, DAG)) | |||
42825 | return DAG.getNode(N->getOpcode(), DL, VT, | |||
42826 | DAG.getBitcast(CondVT, CondNot), RHS, LHS); | |||
42827 | // pcmpgt(X, -1) -> pcmpgt(0, X) to help select/blendv just use the signbit. | |||
42828 | if (Cond.getOpcode() == X86ISD::PCMPGT && Cond.hasOneUse() && | |||
42829 | ISD::isBuildVectorAllOnes(Cond.getOperand(1).getNode())) { | |||
42830 | Cond = DAG.getNode(X86ISD::PCMPGT, DL, CondVT, | |||
42831 | DAG.getConstant(0, DL, CondVT), Cond.getOperand(0)); | |||
42832 | return DAG.getNode(N->getOpcode(), DL, VT, Cond, RHS, LHS); | |||
42833 | } | |||
42834 | } | |||
42835 | ||||
42836 | // Try to optimize vXi1 selects if both operands are either all constants or | |||
42837 | // bitcasts from scalar integer type. In that case we can convert the operands | |||
42838 | // to integer and use an integer select which will be converted to a CMOV. | |||
42839 | // We need to take a little bit of care to avoid creating an i64 type after | |||
42840 | // type legalization. | |||
42841 | if (N->getOpcode() == ISD::SELECT && VT.isVector() && | |||
42842 | VT.getVectorElementType() == MVT::i1 && | |||
42843 | (DCI.isBeforeLegalize() || (VT != MVT::v64i1 || Subtarget.is64Bit()))) { | |||
42844 | EVT IntVT = EVT::getIntegerVT(*DAG.getContext(), VT.getVectorNumElements()); | |||
42845 | bool LHSIsConst = ISD::isBuildVectorOfConstantSDNodes(LHS.getNode()); | |||
42846 | bool RHSIsConst = ISD::isBuildVectorOfConstantSDNodes(RHS.getNode()); | |||
42847 | ||||
42848 | if ((LHSIsConst || | |||
42849 | (LHS.getOpcode() == ISD::BITCAST && | |||
42850 | LHS.getOperand(0).getValueType() == IntVT)) && | |||
42851 | (RHSIsConst || | |||
42852 | (RHS.getOpcode() == ISD::BITCAST && | |||
42853 | RHS.getOperand(0).getValueType() == IntVT))) { | |||
42854 | if (LHSIsConst) | |||
42855 | LHS = combinevXi1ConstantToInteger(LHS, DAG); | |||
42856 | else | |||
42857 | LHS = LHS.getOperand(0); | |||
42858 | ||||
42859 | if (RHSIsConst) | |||
42860 | RHS = combinevXi1ConstantToInteger(RHS, DAG); | |||
42861 | else | |||
42862 | RHS = RHS.getOperand(0); | |||
42863 | ||||
42864 | SDValue Select = DAG.getSelect(DL, IntVT, Cond, LHS, RHS); | |||
42865 | return DAG.getBitcast(VT, Select); | |||
42866 | } | |||
42867 | } | |||
42868 | ||||
42869 | // If this is "((X & C) == 0) ? Y : Z" and C is a constant mask vector of | |||
42870 | // single bits, then invert the predicate and swap the select operands. | |||
42871 | // This can lower using a vector shift bit-hack rather than mask and compare. | |||
42872 | if (DCI.isBeforeLegalize() && !Subtarget.hasAVX512() && | |||
42873 | N->getOpcode() == ISD::VSELECT && Cond.getOpcode() == ISD::SETCC && | |||
42874 | Cond.hasOneUse() && CondVT.getVectorElementType() == MVT::i1 && | |||
42875 | Cond.getOperand(0).getOpcode() == ISD::AND && | |||
42876 | isNullOrNullSplat(Cond.getOperand(1)) && | |||
42877 | cast<CondCodeSDNode>(Cond.getOperand(2))->get() == ISD::SETEQ && | |||
42878 | Cond.getOperand(0).getValueType() == VT) { | |||
42879 | // The 'and' mask must be composed of power-of-2 constants. | |||
42880 | SDValue And = Cond.getOperand(0); | |||
42881 | auto *C = isConstOrConstSplat(And.getOperand(1)); | |||
42882 | if (C && C->getAPIntValue().isPowerOf2()) { | |||
42883 | // vselect (X & C == 0), LHS, RHS --> vselect (X & C != 0), RHS, LHS | |||
42884 | SDValue NotCond = | |||
42885 | DAG.getSetCC(DL, CondVT, And, Cond.getOperand(1), ISD::SETNE); | |||
42886 | return DAG.getSelect(DL, VT, NotCond, RHS, LHS); | |||
42887 | } | |||
42888 | ||||
42889 | // If we have a non-splat but still powers-of-2 mask, AVX1 can use pmulld | |||
42890 | // and AVX2 can use vpsllv{dq}. 8-bit lacks a proper shift or multiply. | |||
42891 | // 16-bit lacks a proper blendv. | |||
42892 | unsigned EltBitWidth = VT.getScalarSizeInBits(); | |||
42893 | bool CanShiftBlend = | |||
42894 | TLI.isTypeLegal(VT) && ((Subtarget.hasAVX() && EltBitWidth == 32) || | |||
42895 | (Subtarget.hasAVX2() && EltBitWidth == 64) || | |||
42896 | (Subtarget.hasXOP())); | |||
42897 | if (CanShiftBlend && | |||
42898 | ISD::matchUnaryPredicate(And.getOperand(1), [](ConstantSDNode *C) { | |||
42899 | return C->getAPIntValue().isPowerOf2(); | |||
42900 | })) { | |||
42901 | // Create a left-shift constant to get the mask bits over to the sign-bit. | |||
42902 | SDValue Mask = And.getOperand(1); | |||
42903 | SmallVector<int, 32> ShlVals; | |||
42904 | for (unsigned i = 0, e = VT.getVectorNumElements(); i != e; ++i) { | |||
42905 | auto *MaskVal = cast<ConstantSDNode>(Mask.getOperand(i)); | |||
42906 | ShlVals.push_back(EltBitWidth - 1 - | |||
42907 | MaskVal->getAPIntValue().exactLogBase2()); | |||
42908 | } | |||
42909 | // vsel ((X & C) == 0), LHS, RHS --> vsel ((shl X, C') < 0), RHS, LHS | |||
42910 | SDValue ShlAmt = getConstVector(ShlVals, VT.getSimpleVT(), DAG, DL); | |||
42911 | SDValue Shl = DAG.getNode(ISD::SHL, DL, VT, And.getOperand(0), ShlAmt); | |||
42912 | SDValue NewCond = | |||
42913 | DAG.getSetCC(DL, CondVT, Shl, Cond.getOperand(1), ISD::SETLT); | |||
42914 | return DAG.getSelect(DL, VT, NewCond, RHS, LHS); | |||
42915 | } | |||
42916 | } | |||
42917 | ||||
42918 | return SDValue(); | |||
42919 | } | |||
42920 | ||||
42921 | /// Combine: | |||
42922 | /// (brcond/cmov/setcc .., (cmp (atomic_load_add x, 1), 0), COND_S) | |||
42923 | /// to: | |||
42924 | /// (brcond/cmov/setcc .., (LADD x, 1), COND_LE) | |||
42925 | /// i.e., reusing the EFLAGS produced by the LOCKed instruction. | |||
42926 | /// Note that this is only legal for some op/cc combinations. | |||
42927 | static SDValue combineSetCCAtomicArith(SDValue Cmp, X86::CondCode &CC, | |||
42928 | SelectionDAG &DAG, | |||
42929 | const X86Subtarget &Subtarget) { | |||
42930 | // This combine only operates on CMP-like nodes. | |||
42931 | if (!(Cmp.getOpcode() == X86ISD::CMP || | |||
42932 | (Cmp.getOpcode() == X86ISD::SUB && !Cmp->hasAnyUseOfValue(0)))) | |||
42933 | return SDValue(); | |||
42934 | ||||
42935 | // Can't replace the cmp if it has more uses than the one we're looking at. | |||
42936 | // FIXME: We would like to be able to handle this, but would need to make sure | |||
42937 | // all uses were updated. | |||
42938 | if (!Cmp.hasOneUse()) | |||
42939 | return SDValue(); | |||
42940 | ||||
42941 | // This only applies to variations of the common case: | |||
42942 | // (icmp slt x, 0) -> (icmp sle (add x, 1), 0) | |||
42943 | // (icmp sge x, 0) -> (icmp sgt (add x, 1), 0) | |||
42944 | // (icmp sle x, 0) -> (icmp slt (sub x, 1), 0) | |||
42945 | // (icmp sgt x, 0) -> (icmp sge (sub x, 1), 0) | |||
42946 | // Using the proper condcodes (see below), overflow is checked for. | |||
42947 | ||||
42948 | // FIXME: We can generalize both constraints: | |||
42949 | // - XOR/OR/AND (if they were made to survive AtomicExpand) | |||
42950 | // - LHS != 1 | |||
42951 | // if the result is compared. | |||
42952 | ||||
42953 | SDValue CmpLHS = Cmp.getOperand(0); | |||
42954 | SDValue CmpRHS = Cmp.getOperand(1); | |||
42955 | EVT CmpVT = CmpLHS.getValueType(); | |||
42956 | ||||
42957 | if (!CmpLHS.hasOneUse()) | |||
42958 | return SDValue(); | |||
42959 | ||||
42960 | unsigned Opc = CmpLHS.getOpcode(); | |||
42961 | if (Opc != ISD::ATOMIC_LOAD_ADD && Opc != ISD::ATOMIC_LOAD_SUB) | |||
42962 | return SDValue(); | |||
42963 | ||||
42964 | SDValue OpRHS = CmpLHS.getOperand(2); | |||
42965 | auto *OpRHSC = dyn_cast<ConstantSDNode>(OpRHS); | |||
42966 | if (!OpRHSC) | |||
42967 | return SDValue(); | |||
42968 | ||||
42969 | APInt Addend = OpRHSC->getAPIntValue(); | |||
42970 | if (Opc == ISD::ATOMIC_LOAD_SUB) | |||
42971 | Addend = -Addend; | |||
42972 | ||||
42973 | auto *CmpRHSC = dyn_cast<ConstantSDNode>(CmpRHS); | |||
42974 | if (!CmpRHSC) | |||
42975 | return SDValue(); | |||
42976 | ||||
42977 | APInt Comparison = CmpRHSC->getAPIntValue(); | |||
42978 | APInt NegAddend = -Addend; | |||
42979 | ||||
42980 | // See if we can adjust the CC to make the comparison match the negated | |||
42981 | // addend. | |||
42982 | if (Comparison != NegAddend) { | |||
42983 | APInt IncComparison = Comparison + 1; | |||
42984 | if (IncComparison == NegAddend) { | |||
42985 | if (CC == X86::COND_A && !Comparison.isMaxValue()) { | |||
42986 | Comparison = IncComparison; | |||
42987 | CC = X86::COND_AE; | |||
42988 | } else if (CC == X86::COND_LE && !Comparison.isMaxSignedValue()) { | |||
42989 | Comparison = IncComparison; | |||
42990 | CC = X86::COND_L; | |||
42991 | } | |||
42992 | } | |||
42993 | APInt DecComparison = Comparison - 1; | |||
42994 | if (DecComparison == NegAddend) { | |||
42995 | if (CC == X86::COND_AE && !Comparison.isMinValue()) { | |||
42996 | Comparison = DecComparison; | |||
42997 | CC = X86::COND_A; | |||
42998 | } else if (CC == X86::COND_L && !Comparison.isMinSignedValue()) { | |||
42999 | Comparison = DecComparison; | |||
43000 | CC = X86::COND_LE; | |||
43001 | } | |||
43002 | } | |||
43003 | } | |||
43004 | ||||
43005 | // If the addend is the negation of the comparison value, then we can do | |||
43006 | // a full comparison by emitting the atomic arithmetic as a locked sub. | |||
43007 | if (Comparison == NegAddend) { | |||
43008 | // The CC is fine, but we need to rewrite the LHS of the comparison as an | |||
43009 | // atomic sub. | |||
43010 | auto *AN = cast<AtomicSDNode>(CmpLHS.getNode()); | |||
43011 | auto AtomicSub = DAG.getAtomic( | |||
43012 | ISD::ATOMIC_LOAD_SUB, SDLoc(CmpLHS), CmpVT, | |||
43013 | /*Chain*/ CmpLHS.getOperand(0), /*LHS*/ CmpLHS.getOperand(1), | |||
43014 | /*RHS*/ DAG.getConstant(NegAddend, SDLoc(CmpRHS), CmpVT), | |||
43015 | AN->getMemOperand()); | |||
43016 | auto LockOp = lowerAtomicArithWithLOCK(AtomicSub, DAG, Subtarget); | |||
43017 | DAG.ReplaceAllUsesOfValueWith(CmpLHS.getValue(0), DAG.getUNDEF(CmpVT)); | |||
43018 | DAG.ReplaceAllUsesOfValueWith(CmpLHS.getValue(1), LockOp.getValue(1)); | |||
43019 | return LockOp; | |||
43020 | } | |||
43021 | ||||
43022 | // We can handle comparisons with zero in a number of cases by manipulating | |||
43023 | // the CC used. | |||
43024 | if (!Comparison.isNullValue()) | |||
43025 | return SDValue(); | |||
43026 | ||||
43027 | if (CC == X86::COND_S && Addend == 1) | |||
43028 | CC = X86::COND_LE; | |||
43029 | else if (CC == X86::COND_NS && Addend == 1) | |||
43030 | CC = X86::COND_G; | |||
43031 | else if (CC == X86::COND_G && Addend == -1) | |||
43032 | CC = X86::COND_GE; | |||
43033 | else if (CC == X86::COND_LE && Addend == -1) | |||
43034 | CC = X86::COND_L; | |||
43035 | else | |||
43036 | return SDValue(); | |||
43037 | ||||
43038 | SDValue LockOp = lowerAtomicArithWithLOCK(CmpLHS, DAG, Subtarget); | |||
43039 | DAG.ReplaceAllUsesOfValueWith(CmpLHS.getValue(0), DAG.getUNDEF(CmpVT)); | |||
43040 | DAG.ReplaceAllUsesOfValueWith(CmpLHS.getValue(1), LockOp.getValue(1)); | |||
43041 | return LockOp; | |||
43042 | } | |||
43043 | ||||
43044 | // Check whether a boolean test is testing a boolean value generated by | |||
43045 | // X86ISD::SETCC. If so, return the operand of that SETCC and proper condition | |||
43046 | // code. | |||
43047 | // | |||
43048 | // Simplify the following patterns: | |||
43049 | // (Op (CMP (SETCC Cond EFLAGS) 1) EQ) or | |||
43050 | // (Op (CMP (SETCC Cond EFLAGS) 0) NEQ) | |||
43051 | // to (Op EFLAGS Cond) | |||
43052 | // | |||
43053 | // (Op (CMP (SETCC Cond EFLAGS) 0) EQ) or | |||
43054 | // (Op (CMP (SETCC Cond EFLAGS) 1) NEQ) | |||
43055 | // to (Op EFLAGS !Cond) | |||
43056 | // | |||
43057 | // where Op could be BRCOND or CMOV. | |||
43058 | // | |||
43059 | static SDValue checkBoolTestSetCCCombine(SDValue Cmp, X86::CondCode &CC) { | |||
43060 | // This combine only operates on CMP-like nodes. | |||
43061 | if (!(Cmp.getOpcode() == X86ISD::CMP || | |||
43062 | (Cmp.getOpcode() == X86ISD::SUB && !Cmp->hasAnyUseOfValue(0)))) | |||
43063 | return SDValue(); | |||
43064 | ||||
43065 | // Quit if not used as a boolean value. | |||
43066 | if (CC != X86::COND_E && CC != X86::COND_NE) | |||
43067 | return SDValue(); | |||
43068 | ||||
43069 | // Check CMP operands. One of them should be 0 or 1 and the other should be | |||
43070 | // an SetCC or extended from it. | |||
43071 | SDValue Op1 = Cmp.getOperand(0); | |||
43072 | SDValue Op2 = Cmp.getOperand(1); | |||
43073 | ||||
43074 | SDValue SetCC; | |||
43075 | const ConstantSDNode* C = nullptr; | |||
43076 | bool needOppositeCond = (CC == X86::COND_E); | |||
43077 | bool checkAgainstTrue = false; // Is it a comparison against 1? | |||
43078 | ||||
43079 | if ((C = dyn_cast<ConstantSDNode>(Op1))) | |||
43080 | SetCC = Op2; | |||
43081 | else if ((C = dyn_cast<ConstantSDNode>(Op2))) | |||
43082 | SetCC = Op1; | |||
43083 | else // Quit if all operands are not constants. | |||
43084 | return SDValue(); | |||
43085 | ||||
43086 | if (C->getZExtValue() == 1) { | |||
43087 | needOppositeCond = !needOppositeCond; | |||
43088 | checkAgainstTrue = true; | |||
43089 | } else if (C->getZExtValue() != 0) | |||
43090 | // Quit if the constant is neither 0 or 1. | |||
43091 | return SDValue(); | |||
43092 | ||||
43093 | bool truncatedToBoolWithAnd = false; | |||
43094 | // Skip (zext $x), (trunc $x), or (and $x, 1) node. | |||
43095 | while (SetCC.getOpcode() == ISD::ZERO_EXTEND || | |||
43096 | SetCC.getOpcode() == ISD::TRUNCATE || | |||
43097 | SetCC.getOpcode() == ISD::AND) { | |||
43098 | if (SetCC.getOpcode() == ISD::AND) { | |||
43099 | int OpIdx = -1; | |||
43100 | if (isOneConstant(SetCC.getOperand(0))) | |||
43101 | OpIdx = 1; | |||
43102 | if (isOneConstant(SetCC.getOperand(1))) | |||
43103 | OpIdx = 0; | |||
43104 | if (OpIdx < 0) | |||
43105 | break; | |||
43106 | SetCC = SetCC.getOperand(OpIdx); | |||
43107 | truncatedToBoolWithAnd = true; | |||
43108 | } else | |||
43109 | SetCC = SetCC.getOperand(0); | |||
43110 | } | |||
43111 | ||||
43112 | switch (SetCC.getOpcode()) { | |||
43113 | case X86ISD::SETCC_CARRY: | |||
43114 | // Since SETCC_CARRY gives output based on R = CF ? ~0 : 0, it's unsafe to | |||
43115 | // simplify it if the result of SETCC_CARRY is not canonicalized to 0 or 1, | |||
43116 | // i.e. it's a comparison against true but the result of SETCC_CARRY is not | |||
43117 | // truncated to i1 using 'and'. | |||
43118 | if (checkAgainstTrue && !truncatedToBoolWithAnd) | |||
43119 | break; | |||
43120 | assert(X86::CondCode(SetCC.getConstantOperandVal(0)) == X86::COND_B &&(static_cast <bool> (X86::CondCode(SetCC.getConstantOperandVal (0)) == X86::COND_B && "Invalid use of SETCC_CARRY!") ? void (0) : __assert_fail ("X86::CondCode(SetCC.getConstantOperandVal(0)) == X86::COND_B && \"Invalid use of SETCC_CARRY!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 43121, __extension__ __PRETTY_FUNCTION__)) | |||
43121 | "Invalid use of SETCC_CARRY!")(static_cast <bool> (X86::CondCode(SetCC.getConstantOperandVal (0)) == X86::COND_B && "Invalid use of SETCC_CARRY!") ? void (0) : __assert_fail ("X86::CondCode(SetCC.getConstantOperandVal(0)) == X86::COND_B && \"Invalid use of SETCC_CARRY!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 43121, __extension__ __PRETTY_FUNCTION__)); | |||
43122 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
43123 | case X86ISD::SETCC: | |||
43124 | // Set the condition code or opposite one if necessary. | |||
43125 | CC = X86::CondCode(SetCC.getConstantOperandVal(0)); | |||
43126 | if (needOppositeCond) | |||
43127 | CC = X86::GetOppositeBranchCondition(CC); | |||
43128 | return SetCC.getOperand(1); | |||
43129 | case X86ISD::CMOV: { | |||
43130 | // Check whether false/true value has canonical one, i.e. 0 or 1. | |||
43131 | ConstantSDNode *FVal = dyn_cast<ConstantSDNode>(SetCC.getOperand(0)); | |||
43132 | ConstantSDNode *TVal = dyn_cast<ConstantSDNode>(SetCC.getOperand(1)); | |||
43133 | // Quit if true value is not a constant. | |||
43134 | if (!TVal) | |||
43135 | return SDValue(); | |||
43136 | // Quit if false value is not a constant. | |||
43137 | if (!FVal) { | |||
43138 | SDValue Op = SetCC.getOperand(0); | |||
43139 | // Skip 'zext' or 'trunc' node. | |||
43140 | if (Op.getOpcode() == ISD::ZERO_EXTEND || | |||
43141 | Op.getOpcode() == ISD::TRUNCATE) | |||
43142 | Op = Op.getOperand(0); | |||
43143 | // A special case for rdrand/rdseed, where 0 is set if false cond is | |||
43144 | // found. | |||
43145 | if ((Op.getOpcode() != X86ISD::RDRAND && | |||
43146 | Op.getOpcode() != X86ISD::RDSEED) || Op.getResNo() != 0) | |||
43147 | return SDValue(); | |||
43148 | } | |||
43149 | // Quit if false value is not the constant 0 or 1. | |||
43150 | bool FValIsFalse = true; | |||
43151 | if (FVal && FVal->getZExtValue() != 0) { | |||
43152 | if (FVal->getZExtValue() != 1) | |||
43153 | return SDValue(); | |||
43154 | // If FVal is 1, opposite cond is needed. | |||
43155 | needOppositeCond = !needOppositeCond; | |||
43156 | FValIsFalse = false; | |||
43157 | } | |||
43158 | // Quit if TVal is not the constant opposite of FVal. | |||
43159 | if (FValIsFalse && TVal->getZExtValue() != 1) | |||
43160 | return SDValue(); | |||
43161 | if (!FValIsFalse && TVal->getZExtValue() != 0) | |||
43162 | return SDValue(); | |||
43163 | CC = X86::CondCode(SetCC.getConstantOperandVal(2)); | |||
43164 | if (needOppositeCond) | |||
43165 | CC = X86::GetOppositeBranchCondition(CC); | |||
43166 | return SetCC.getOperand(3); | |||
43167 | } | |||
43168 | } | |||
43169 | ||||
43170 | return SDValue(); | |||
43171 | } | |||
43172 | ||||
43173 | /// Check whether Cond is an AND/OR of SETCCs off of the same EFLAGS. | |||
43174 | /// Match: | |||
43175 | /// (X86or (X86setcc) (X86setcc)) | |||
43176 | /// (X86cmp (and (X86setcc) (X86setcc)), 0) | |||
43177 | static bool checkBoolTestAndOrSetCCCombine(SDValue Cond, X86::CondCode &CC0, | |||
43178 | X86::CondCode &CC1, SDValue &Flags, | |||
43179 | bool &isAnd) { | |||
43180 | if (Cond->getOpcode() == X86ISD::CMP) { | |||
43181 | if (!isNullConstant(Cond->getOperand(1))) | |||
43182 | return false; | |||
43183 | ||||
43184 | Cond = Cond->getOperand(0); | |||
43185 | } | |||
43186 | ||||
43187 | isAnd = false; | |||
43188 | ||||
43189 | SDValue SetCC0, SetCC1; | |||
43190 | switch (Cond->getOpcode()) { | |||
43191 | default: return false; | |||
43192 | case ISD::AND: | |||
43193 | case X86ISD::AND: | |||
43194 | isAnd = true; | |||
43195 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
43196 | case ISD::OR: | |||
43197 | case X86ISD::OR: | |||
43198 | SetCC0 = Cond->getOperand(0); | |||
43199 | SetCC1 = Cond->getOperand(1); | |||
43200 | break; | |||
43201 | }; | |||
43202 | ||||
43203 | // Make sure we have SETCC nodes, using the same flags value. | |||
43204 | if (SetCC0.getOpcode() != X86ISD::SETCC || | |||
43205 | SetCC1.getOpcode() != X86ISD::SETCC || | |||
43206 | SetCC0->getOperand(1) != SetCC1->getOperand(1)) | |||
43207 | return false; | |||
43208 | ||||
43209 | CC0 = (X86::CondCode)SetCC0->getConstantOperandVal(0); | |||
43210 | CC1 = (X86::CondCode)SetCC1->getConstantOperandVal(0); | |||
43211 | Flags = SetCC0->getOperand(1); | |||
43212 | return true; | |||
43213 | } | |||
43214 | ||||
43215 | // When legalizing carry, we create carries via add X, -1 | |||
43216 | // If that comes from an actual carry, via setcc, we use the | |||
43217 | // carry directly. | |||
43218 | static SDValue combineCarryThroughADD(SDValue EFLAGS, SelectionDAG &DAG) { | |||
43219 | if (EFLAGS.getOpcode() == X86ISD::ADD) { | |||
43220 | if (isAllOnesConstant(EFLAGS.getOperand(1))) { | |||
43221 | SDValue Carry = EFLAGS.getOperand(0); | |||
43222 | while (Carry.getOpcode() == ISD::TRUNCATE || | |||
43223 | Carry.getOpcode() == ISD::ZERO_EXTEND || | |||
43224 | Carry.getOpcode() == ISD::SIGN_EXTEND || | |||
43225 | Carry.getOpcode() == ISD::ANY_EXTEND || | |||
43226 | (Carry.getOpcode() == ISD::AND && | |||
43227 | isOneConstant(Carry.getOperand(1)))) | |||
43228 | Carry = Carry.getOperand(0); | |||
43229 | if (Carry.getOpcode() == X86ISD::SETCC || | |||
43230 | Carry.getOpcode() == X86ISD::SETCC_CARRY) { | |||
43231 | // TODO: Merge this code with equivalent in combineAddOrSubToADCOrSBB? | |||
43232 | uint64_t CarryCC = Carry.getConstantOperandVal(0); | |||
43233 | SDValue CarryOp1 = Carry.getOperand(1); | |||
43234 | if (CarryCC == X86::COND_B) | |||
43235 | return CarryOp1; | |||
43236 | if (CarryCC == X86::COND_A) { | |||
43237 | // Try to convert COND_A into COND_B in an attempt to facilitate | |||
43238 | // materializing "setb reg". | |||
43239 | // | |||
43240 | // Do not flip "e > c", where "c" is a constant, because Cmp | |||
43241 | // instruction cannot take an immediate as its first operand. | |||
43242 | // | |||
43243 | if (CarryOp1.getOpcode() == X86ISD::SUB && | |||
43244 | CarryOp1.getNode()->hasOneUse() && | |||
43245 | CarryOp1.getValueType().isInteger() && | |||
43246 | !isa<ConstantSDNode>(CarryOp1.getOperand(1))) { | |||
43247 | SDValue SubCommute = | |||
43248 | DAG.getNode(X86ISD::SUB, SDLoc(CarryOp1), CarryOp1->getVTList(), | |||
43249 | CarryOp1.getOperand(1), CarryOp1.getOperand(0)); | |||
43250 | return SDValue(SubCommute.getNode(), CarryOp1.getResNo()); | |||
43251 | } | |||
43252 | } | |||
43253 | // If this is a check of the z flag of an add with 1, switch to the | |||
43254 | // C flag. | |||
43255 | if (CarryCC == X86::COND_E && | |||
43256 | CarryOp1.getOpcode() == X86ISD::ADD && | |||
43257 | isOneConstant(CarryOp1.getOperand(1))) | |||
43258 | return CarryOp1; | |||
43259 | } | |||
43260 | } | |||
43261 | } | |||
43262 | ||||
43263 | return SDValue(); | |||
43264 | } | |||
43265 | ||||
43266 | /// If we are inverting an PTEST/TESTP operand, attempt to adjust the CC | |||
43267 | /// to avoid the inversion. | |||
43268 | static SDValue combinePTESTCC(SDValue EFLAGS, X86::CondCode &CC, | |||
43269 | SelectionDAG &DAG, | |||
43270 | const X86Subtarget &Subtarget) { | |||
43271 | // TODO: Handle X86ISD::KTEST/X86ISD::KORTEST. | |||
43272 | if (EFLAGS.getOpcode() != X86ISD::PTEST && | |||
43273 | EFLAGS.getOpcode() != X86ISD::TESTP) | |||
43274 | return SDValue(); | |||
43275 | ||||
43276 | // PTEST/TESTP sets EFLAGS as: | |||
43277 | // TESTZ: ZF = (Op0 & Op1) == 0 | |||
43278 | // TESTC: CF = (~Op0 & Op1) == 0 | |||
43279 | // TESTNZC: ZF == 0 && CF == 0 | |||
43280 | EVT VT = EFLAGS.getValueType(); | |||
43281 | SDValue Op0 = EFLAGS.getOperand(0); | |||
43282 | SDValue Op1 = EFLAGS.getOperand(1); | |||
43283 | EVT OpVT = Op0.getValueType(); | |||
43284 | ||||
43285 | // TEST*(~X,Y) == TEST*(X,Y) | |||
43286 | if (SDValue NotOp0 = IsNOT(Op0, DAG)) { | |||
43287 | X86::CondCode InvCC; | |||
43288 | switch (CC) { | |||
43289 | case X86::COND_B: | |||
43290 | // testc -> testz. | |||
43291 | InvCC = X86::COND_E; | |||
43292 | break; | |||
43293 | case X86::COND_AE: | |||
43294 | // !testc -> !testz. | |||
43295 | InvCC = X86::COND_NE; | |||
43296 | break; | |||
43297 | case X86::COND_E: | |||
43298 | // testz -> testc. | |||
43299 | InvCC = X86::COND_B; | |||
43300 | break; | |||
43301 | case X86::COND_NE: | |||
43302 | // !testz -> !testc. | |||
43303 | InvCC = X86::COND_AE; | |||
43304 | break; | |||
43305 | case X86::COND_A: | |||
43306 | case X86::COND_BE: | |||
43307 | // testnzc -> testnzc (no change). | |||
43308 | InvCC = CC; | |||
43309 | break; | |||
43310 | default: | |||
43311 | InvCC = X86::COND_INVALID; | |||
43312 | break; | |||
43313 | } | |||
43314 | ||||
43315 | if (InvCC != X86::COND_INVALID) { | |||
43316 | CC = InvCC; | |||
43317 | return DAG.getNode(EFLAGS.getOpcode(), SDLoc(EFLAGS), VT, | |||
43318 | DAG.getBitcast(OpVT, NotOp0), Op1); | |||
43319 | } | |||
43320 | } | |||
43321 | ||||
43322 | if (CC == X86::COND_E || CC == X86::COND_NE) { | |||
43323 | // TESTZ(X,~Y) == TESTC(Y,X) | |||
43324 | if (SDValue NotOp1 = IsNOT(Op1, DAG)) { | |||
43325 | CC = (CC == X86::COND_E ? X86::COND_B : X86::COND_AE); | |||
43326 | return DAG.getNode(EFLAGS.getOpcode(), SDLoc(EFLAGS), VT, | |||
43327 | DAG.getBitcast(OpVT, NotOp1), Op0); | |||
43328 | } | |||
43329 | ||||
43330 | if (Op0 == Op1) { | |||
43331 | SDValue BC = peekThroughBitcasts(Op0); | |||
43332 | EVT BCVT = BC.getValueType(); | |||
43333 | assert(BCVT.isVector() && DAG.getTargetLoweringInfo().isTypeLegal(BCVT) &&(static_cast <bool> (BCVT.isVector() && DAG.getTargetLoweringInfo ().isTypeLegal(BCVT) && "Unexpected vector type") ? void (0) : __assert_fail ("BCVT.isVector() && DAG.getTargetLoweringInfo().isTypeLegal(BCVT) && \"Unexpected vector type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 43334, __extension__ __PRETTY_FUNCTION__)) | |||
43334 | "Unexpected vector type")(static_cast <bool> (BCVT.isVector() && DAG.getTargetLoweringInfo ().isTypeLegal(BCVT) && "Unexpected vector type") ? void (0) : __assert_fail ("BCVT.isVector() && DAG.getTargetLoweringInfo().isTypeLegal(BCVT) && \"Unexpected vector type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 43334, __extension__ __PRETTY_FUNCTION__)); | |||
43335 | ||||
43336 | // TESTZ(AND(X,Y),AND(X,Y)) == TESTZ(X,Y) | |||
43337 | if (BC.getOpcode() == ISD::AND || BC.getOpcode() == X86ISD::FAND) { | |||
43338 | return DAG.getNode(EFLAGS.getOpcode(), SDLoc(EFLAGS), VT, | |||
43339 | DAG.getBitcast(OpVT, BC.getOperand(0)), | |||
43340 | DAG.getBitcast(OpVT, BC.getOperand(1))); | |||
43341 | } | |||
43342 | ||||
43343 | // TESTZ(AND(~X,Y),AND(~X,Y)) == TESTC(X,Y) | |||
43344 | if (BC.getOpcode() == X86ISD::ANDNP || BC.getOpcode() == X86ISD::FANDN) { | |||
43345 | CC = (CC == X86::COND_E ? X86::COND_B : X86::COND_AE); | |||
43346 | return DAG.getNode(EFLAGS.getOpcode(), SDLoc(EFLAGS), VT, | |||
43347 | DAG.getBitcast(OpVT, BC.getOperand(0)), | |||
43348 | DAG.getBitcast(OpVT, BC.getOperand(1))); | |||
43349 | } | |||
43350 | ||||
43351 | // If every element is an all-sign value, see if we can use MOVMSK to | |||
43352 | // more efficiently extract the sign bits and compare that. | |||
43353 | // TODO: Handle TESTC with comparison inversion. | |||
43354 | // TODO: Can we remove SimplifyMultipleUseDemandedBits and rely on | |||
43355 | // MOVMSK combines to make sure its never worse than PTEST? | |||
43356 | unsigned EltBits = BCVT.getScalarSizeInBits(); | |||
43357 | if (DAG.ComputeNumSignBits(BC) == EltBits) { | |||
43358 | assert(VT == MVT::i32 && "Expected i32 EFLAGS comparison result")(static_cast <bool> (VT == MVT::i32 && "Expected i32 EFLAGS comparison result" ) ? void (0) : __assert_fail ("VT == MVT::i32 && \"Expected i32 EFLAGS comparison result\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 43358, __extension__ __PRETTY_FUNCTION__)); | |||
43359 | APInt SignMask = APInt::getSignMask(EltBits); | |||
43360 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
43361 | if (SDValue Res = | |||
43362 | TLI.SimplifyMultipleUseDemandedBits(BC, SignMask, DAG)) { | |||
43363 | // For vXi16 cases we need to use pmovmksb and extract every other | |||
43364 | // sign bit. | |||
43365 | SDLoc DL(EFLAGS); | |||
43366 | if (EltBits == 16) { | |||
43367 | MVT MovmskVT = BCVT.is128BitVector() ? MVT::v16i8 : MVT::v32i8; | |||
43368 | Res = DAG.getBitcast(MovmskVT, Res); | |||
43369 | Res = getPMOVMSKB(DL, Res, DAG, Subtarget); | |||
43370 | Res = DAG.getNode(ISD::AND, DL, MVT::i32, Res, | |||
43371 | DAG.getConstant(0xAAAAAAAA, DL, MVT::i32)); | |||
43372 | } else { | |||
43373 | Res = getPMOVMSKB(DL, Res, DAG, Subtarget); | |||
43374 | } | |||
43375 | return DAG.getNode(X86ISD::CMP, DL, MVT::i32, Res, | |||
43376 | DAG.getConstant(0, DL, MVT::i32)); | |||
43377 | } | |||
43378 | } | |||
43379 | } | |||
43380 | ||||
43381 | // TESTZ(-1,X) == TESTZ(X,X) | |||
43382 | if (ISD::isBuildVectorAllOnes(Op0.getNode())) | |||
43383 | return DAG.getNode(EFLAGS.getOpcode(), SDLoc(EFLAGS), VT, Op1, Op1); | |||
43384 | ||||
43385 | // TESTZ(X,-1) == TESTZ(X,X) | |||
43386 | if (ISD::isBuildVectorAllOnes(Op1.getNode())) | |||
43387 | return DAG.getNode(EFLAGS.getOpcode(), SDLoc(EFLAGS), VT, Op0, Op0); | |||
43388 | } | |||
43389 | ||||
43390 | return SDValue(); | |||
43391 | } | |||
43392 | ||||
43393 | // Attempt to simplify the MOVMSK input based on the comparison type. | |||
43394 | static SDValue combineSetCCMOVMSK(SDValue EFLAGS, X86::CondCode &CC, | |||
43395 | SelectionDAG &DAG, | |||
43396 | const X86Subtarget &Subtarget) { | |||
43397 | // Handle eq/ne against zero (any_of). | |||
43398 | // Handle eq/ne against -1 (all_of). | |||
43399 | if (!(CC == X86::COND_E || CC == X86::COND_NE)) | |||
43400 | return SDValue(); | |||
43401 | if (EFLAGS.getValueType() != MVT::i32) | |||
43402 | return SDValue(); | |||
43403 | unsigned CmpOpcode = EFLAGS.getOpcode(); | |||
43404 | if (CmpOpcode != X86ISD::CMP && CmpOpcode != X86ISD::SUB) | |||
43405 | return SDValue(); | |||
43406 | auto *CmpConstant = dyn_cast<ConstantSDNode>(EFLAGS.getOperand(1)); | |||
43407 | if (!CmpConstant) | |||
43408 | return SDValue(); | |||
43409 | const APInt &CmpVal = CmpConstant->getAPIntValue(); | |||
43410 | ||||
43411 | SDValue CmpOp = EFLAGS.getOperand(0); | |||
43412 | unsigned CmpBits = CmpOp.getValueSizeInBits(); | |||
43413 | assert(CmpBits == CmpVal.getBitWidth() && "Value size mismatch")(static_cast <bool> (CmpBits == CmpVal.getBitWidth() && "Value size mismatch") ? void (0) : __assert_fail ("CmpBits == CmpVal.getBitWidth() && \"Value size mismatch\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 43413, __extension__ __PRETTY_FUNCTION__)); | |||
43414 | ||||
43415 | // Peek through any truncate. | |||
43416 | if (CmpOp.getOpcode() == ISD::TRUNCATE) | |||
43417 | CmpOp = CmpOp.getOperand(0); | |||
43418 | ||||
43419 | // Bail if we don't find a MOVMSK. | |||
43420 | if (CmpOp.getOpcode() != X86ISD::MOVMSK) | |||
43421 | return SDValue(); | |||
43422 | ||||
43423 | SDValue Vec = CmpOp.getOperand(0); | |||
43424 | MVT VecVT = Vec.getSimpleValueType(); | |||
43425 | assert((VecVT.is128BitVector() || VecVT.is256BitVector()) &&(static_cast <bool> ((VecVT.is128BitVector() || VecVT.is256BitVector ()) && "Unexpected MOVMSK operand") ? void (0) : __assert_fail ("(VecVT.is128BitVector() || VecVT.is256BitVector()) && \"Unexpected MOVMSK operand\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 43426, __extension__ __PRETTY_FUNCTION__)) | |||
43426 | "Unexpected MOVMSK operand")(static_cast <bool> ((VecVT.is128BitVector() || VecVT.is256BitVector ()) && "Unexpected MOVMSK operand") ? void (0) : __assert_fail ("(VecVT.is128BitVector() || VecVT.is256BitVector()) && \"Unexpected MOVMSK operand\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 43426, __extension__ __PRETTY_FUNCTION__)); | |||
43427 | unsigned NumElts = VecVT.getVectorNumElements(); | |||
43428 | unsigned NumEltBits = VecVT.getScalarSizeInBits(); | |||
43429 | ||||
43430 | bool IsAnyOf = CmpOpcode == X86ISD::CMP && CmpVal.isNullValue(); | |||
43431 | bool IsAllOf = CmpOpcode == X86ISD::SUB && NumElts <= CmpBits && | |||
43432 | CmpVal.isMask(NumElts); | |||
43433 | if (!IsAnyOf && !IsAllOf) | |||
43434 | return SDValue(); | |||
43435 | ||||
43436 | // See if we can peek through to a vector with a wider element type, if the | |||
43437 | // signbits extend down to all the sub-elements as well. | |||
43438 | // Calling MOVMSK with the wider type, avoiding the bitcast, helps expose | |||
43439 | // potential SimplifyDemandedBits/Elts cases. | |||
43440 | if (Vec.getOpcode() == ISD::BITCAST) { | |||
43441 | SDValue BC = peekThroughBitcasts(Vec); | |||
43442 | MVT BCVT = BC.getSimpleValueType(); | |||
43443 | unsigned BCNumElts = BCVT.getVectorNumElements(); | |||
43444 | unsigned BCNumEltBits = BCVT.getScalarSizeInBits(); | |||
43445 | if ((BCNumEltBits == 32 || BCNumEltBits == 64) && | |||
43446 | BCNumEltBits > NumEltBits && | |||
43447 | DAG.ComputeNumSignBits(BC) > (BCNumEltBits - NumEltBits)) { | |||
43448 | SDLoc DL(EFLAGS); | |||
43449 | unsigned CmpMask = IsAnyOf ? 0 : ((1 << BCNumElts) - 1); | |||
43450 | return DAG.getNode(X86ISD::CMP, DL, MVT::i32, | |||
43451 | DAG.getNode(X86ISD::MOVMSK, DL, MVT::i32, BC), | |||
43452 | DAG.getConstant(CmpMask, DL, MVT::i32)); | |||
43453 | } | |||
43454 | } | |||
43455 | ||||
43456 | // MOVMSK(PCMPEQ(X,0)) == -1 -> PTESTZ(X,X). | |||
43457 | // MOVMSK(PCMPEQ(X,0)) != -1 -> !PTESTZ(X,X). | |||
43458 | if (IsAllOf && Subtarget.hasSSE41()) { | |||
43459 | SDValue BC = peekThroughBitcasts(Vec); | |||
43460 | if (BC.getOpcode() == X86ISD::PCMPEQ && | |||
43461 | ISD::isBuildVectorAllZeros(BC.getOperand(1).getNode())) { | |||
43462 | MVT TestVT = VecVT.is128BitVector() ? MVT::v2i64 : MVT::v4i64; | |||
43463 | SDValue V = DAG.getBitcast(TestVT, BC.getOperand(0)); | |||
43464 | return DAG.getNode(X86ISD::PTEST, SDLoc(EFLAGS), MVT::i32, V, V); | |||
43465 | } | |||
43466 | } | |||
43467 | ||||
43468 | // See if we can avoid a PACKSS by calling MOVMSK on the sources. | |||
43469 | // For vXi16 cases we can use a v2Xi8 PMOVMSKB. We must mask out | |||
43470 | // sign bits prior to the comparison with zero unless we know that | |||
43471 | // the vXi16 splats the sign bit down to the lower i8 half. | |||
43472 | // TODO: Handle all_of patterns. | |||
43473 | if (Vec.getOpcode() == X86ISD::PACKSS && VecVT == MVT::v16i8) { | |||
43474 | SDValue VecOp0 = Vec.getOperand(0); | |||
43475 | SDValue VecOp1 = Vec.getOperand(1); | |||
43476 | bool SignExt0 = DAG.ComputeNumSignBits(VecOp0) > 8; | |||
43477 | bool SignExt1 = DAG.ComputeNumSignBits(VecOp1) > 8; | |||
43478 | // PMOVMSKB(PACKSSBW(X, undef)) -> PMOVMSKB(BITCAST_v16i8(X)) & 0xAAAA. | |||
43479 | if (IsAnyOf && CmpBits == 8 && VecOp1.isUndef()) { | |||
43480 | SDLoc DL(EFLAGS); | |||
43481 | SDValue Result = DAG.getBitcast(MVT::v16i8, VecOp0); | |||
43482 | Result = DAG.getNode(X86ISD::MOVMSK, DL, MVT::i32, Result); | |||
43483 | Result = DAG.getZExtOrTrunc(Result, DL, MVT::i16); | |||
43484 | if (!SignExt0) { | |||
43485 | Result = DAG.getNode(ISD::AND, DL, MVT::i16, Result, | |||
43486 | DAG.getConstant(0xAAAA, DL, MVT::i16)); | |||
43487 | } | |||
43488 | return DAG.getNode(X86ISD::CMP, DL, MVT::i32, Result, | |||
43489 | DAG.getConstant(0, DL, MVT::i16)); | |||
43490 | } | |||
43491 | // PMOVMSKB(PACKSSBW(LO(X), HI(X))) | |||
43492 | // -> PMOVMSKB(BITCAST_v32i8(X)) & 0xAAAAAAAA. | |||
43493 | if (CmpBits >= 16 && Subtarget.hasInt256() && | |||
43494 | VecOp0.getOpcode() == ISD::EXTRACT_SUBVECTOR && | |||
43495 | VecOp1.getOpcode() == ISD::EXTRACT_SUBVECTOR && | |||
43496 | VecOp0.getOperand(0) == VecOp1.getOperand(0) && | |||
43497 | VecOp0.getConstantOperandAPInt(1) == 0 && | |||
43498 | VecOp1.getConstantOperandAPInt(1) == 8 && | |||
43499 | (IsAnyOf || (SignExt0 && SignExt1))) { | |||
43500 | SDLoc DL(EFLAGS); | |||
43501 | SDValue Result = DAG.getBitcast(MVT::v32i8, VecOp0.getOperand(0)); | |||
43502 | Result = DAG.getNode(X86ISD::MOVMSK, DL, MVT::i32, Result); | |||
43503 | unsigned CmpMask = IsAnyOf ? 0 : 0xFFFFFFFF; | |||
43504 | if (!SignExt0 || !SignExt1) { | |||
43505 | assert(IsAnyOf && "Only perform v16i16 signmasks for any_of patterns")(static_cast <bool> (IsAnyOf && "Only perform v16i16 signmasks for any_of patterns" ) ? void (0) : __assert_fail ("IsAnyOf && \"Only perform v16i16 signmasks for any_of patterns\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 43505, __extension__ __PRETTY_FUNCTION__)); | |||
43506 | Result = DAG.getNode(ISD::AND, DL, MVT::i32, Result, | |||
43507 | DAG.getConstant(0xAAAAAAAA, DL, MVT::i32)); | |||
43508 | } | |||
43509 | return DAG.getNode(X86ISD::CMP, DL, MVT::i32, Result, | |||
43510 | DAG.getConstant(CmpMask, DL, MVT::i32)); | |||
43511 | } | |||
43512 | } | |||
43513 | ||||
43514 | // MOVMSK(SHUFFLE(X,u)) -> MOVMSK(X) iff every element is referenced. | |||
43515 | SmallVector<int, 32> ShuffleMask; | |||
43516 | SmallVector<SDValue, 2> ShuffleInputs; | |||
43517 | if (NumElts <= CmpBits && | |||
43518 | getTargetShuffleInputs(peekThroughBitcasts(Vec), ShuffleInputs, | |||
43519 | ShuffleMask, DAG) && | |||
43520 | ShuffleInputs.size() == 1 && !isAnyZeroOrUndef(ShuffleMask) && | |||
43521 | ShuffleInputs[0].getValueSizeInBits() == VecVT.getSizeInBits()) { | |||
43522 | unsigned NumShuffleElts = ShuffleMask.size(); | |||
43523 | APInt DemandedElts = APInt::getNullValue(NumShuffleElts); | |||
43524 | for (int M : ShuffleMask) { | |||
43525 | assert(0 <= M && M < (int)NumShuffleElts && "Bad unary shuffle index")(static_cast <bool> (0 <= M && M < (int)NumShuffleElts && "Bad unary shuffle index") ? void (0) : __assert_fail ("0 <= M && M < (int)NumShuffleElts && \"Bad unary shuffle index\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 43525, __extension__ __PRETTY_FUNCTION__)); | |||
43526 | DemandedElts.setBit(M); | |||
43527 | } | |||
43528 | if (DemandedElts.isAllOnesValue()) { | |||
43529 | SDLoc DL(EFLAGS); | |||
43530 | SDValue Result = DAG.getBitcast(VecVT, ShuffleInputs[0]); | |||
43531 | Result = DAG.getNode(X86ISD::MOVMSK, DL, MVT::i32, Result); | |||
43532 | Result = | |||
43533 | DAG.getZExtOrTrunc(Result, DL, EFLAGS.getOperand(0).getValueType()); | |||
43534 | return DAG.getNode(X86ISD::CMP, DL, MVT::i32, Result, | |||
43535 | EFLAGS.getOperand(1)); | |||
43536 | } | |||
43537 | } | |||
43538 | ||||
43539 | return SDValue(); | |||
43540 | } | |||
43541 | ||||
43542 | /// Optimize an EFLAGS definition used according to the condition code \p CC | |||
43543 | /// into a simpler EFLAGS value, potentially returning a new \p CC and replacing | |||
43544 | /// uses of chain values. | |||
43545 | static SDValue combineSetCCEFLAGS(SDValue EFLAGS, X86::CondCode &CC, | |||
43546 | SelectionDAG &DAG, | |||
43547 | const X86Subtarget &Subtarget) { | |||
43548 | if (CC == X86::COND_B) | |||
43549 | if (SDValue Flags = combineCarryThroughADD(EFLAGS, DAG)) | |||
43550 | return Flags; | |||
43551 | ||||
43552 | if (SDValue R = checkBoolTestSetCCCombine(EFLAGS, CC)) | |||
43553 | return R; | |||
43554 | ||||
43555 | if (SDValue R = combinePTESTCC(EFLAGS, CC, DAG, Subtarget)) | |||
43556 | return R; | |||
43557 | ||||
43558 | if (SDValue R = combineSetCCMOVMSK(EFLAGS, CC, DAG, Subtarget)) | |||
43559 | return R; | |||
43560 | ||||
43561 | return combineSetCCAtomicArith(EFLAGS, CC, DAG, Subtarget); | |||
43562 | } | |||
43563 | ||||
43564 | /// Optimize X86ISD::CMOV [LHS, RHS, CONDCODE (e.g. X86::COND_NE), CONDVAL] | |||
43565 | static SDValue combineCMov(SDNode *N, SelectionDAG &DAG, | |||
43566 | TargetLowering::DAGCombinerInfo &DCI, | |||
43567 | const X86Subtarget &Subtarget) { | |||
43568 | SDLoc DL(N); | |||
43569 | ||||
43570 | SDValue FalseOp = N->getOperand(0); | |||
43571 | SDValue TrueOp = N->getOperand(1); | |||
43572 | X86::CondCode CC = (X86::CondCode)N->getConstantOperandVal(2); | |||
43573 | SDValue Cond = N->getOperand(3); | |||
43574 | ||||
43575 | // cmov X, X, ?, ? --> X | |||
43576 | if (TrueOp == FalseOp) | |||
43577 | return TrueOp; | |||
43578 | ||||
43579 | // Try to simplify the EFLAGS and condition code operands. | |||
43580 | // We can't always do this as FCMOV only supports a subset of X86 cond. | |||
43581 | if (SDValue Flags = combineSetCCEFLAGS(Cond, CC, DAG, Subtarget)) { | |||
43582 | if (!(FalseOp.getValueType() == MVT::f80 || | |||
43583 | (FalseOp.getValueType() == MVT::f64 && !Subtarget.hasSSE2()) || | |||
43584 | (FalseOp.getValueType() == MVT::f32 && !Subtarget.hasSSE1())) || | |||
43585 | !Subtarget.hasCMov() || hasFPCMov(CC)) { | |||
43586 | SDValue Ops[] = {FalseOp, TrueOp, DAG.getTargetConstant(CC, DL, MVT::i8), | |||
43587 | Flags}; | |||
43588 | return DAG.getNode(X86ISD::CMOV, DL, N->getValueType(0), Ops); | |||
43589 | } | |||
43590 | } | |||
43591 | ||||
43592 | // If this is a select between two integer constants, try to do some | |||
43593 | // optimizations. Note that the operands are ordered the opposite of SELECT | |||
43594 | // operands. | |||
43595 | if (ConstantSDNode *TrueC = dyn_cast<ConstantSDNode>(TrueOp)) { | |||
43596 | if (ConstantSDNode *FalseC = dyn_cast<ConstantSDNode>(FalseOp)) { | |||
43597 | // Canonicalize the TrueC/FalseC values so that TrueC (the true value) is | |||
43598 | // larger than FalseC (the false value). | |||
43599 | if (TrueC->getAPIntValue().ult(FalseC->getAPIntValue())) { | |||
43600 | CC = X86::GetOppositeBranchCondition(CC); | |||
43601 | std::swap(TrueC, FalseC); | |||
43602 | std::swap(TrueOp, FalseOp); | |||
43603 | } | |||
43604 | ||||
43605 | // Optimize C ? 8 : 0 -> zext(setcc(C)) << 3. Likewise for any pow2/0. | |||
43606 | // This is efficient for any integer data type (including i8/i16) and | |||
43607 | // shift amount. | |||
43608 | if (FalseC->getAPIntValue() == 0 && TrueC->getAPIntValue().isPowerOf2()) { | |||
43609 | Cond = getSETCC(CC, Cond, DL, DAG); | |||
43610 | ||||
43611 | // Zero extend the condition if needed. | |||
43612 | Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, TrueC->getValueType(0), Cond); | |||
43613 | ||||
43614 | unsigned ShAmt = TrueC->getAPIntValue().logBase2(); | |||
43615 | Cond = DAG.getNode(ISD::SHL, DL, Cond.getValueType(), Cond, | |||
43616 | DAG.getConstant(ShAmt, DL, MVT::i8)); | |||
43617 | return Cond; | |||
43618 | } | |||
43619 | ||||
43620 | // Optimize Cond ? cst+1 : cst -> zext(setcc(C)+cst. This is efficient | |||
43621 | // for any integer data type, including i8/i16. | |||
43622 | if (FalseC->getAPIntValue()+1 == TrueC->getAPIntValue()) { | |||
43623 | Cond = getSETCC(CC, Cond, DL, DAG); | |||
43624 | ||||
43625 | // Zero extend the condition if needed. | |||
43626 | Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, | |||
43627 | FalseC->getValueType(0), Cond); | |||
43628 | Cond = DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond, | |||
43629 | SDValue(FalseC, 0)); | |||
43630 | return Cond; | |||
43631 | } | |||
43632 | ||||
43633 | // Optimize cases that will turn into an LEA instruction. This requires | |||
43634 | // an i32 or i64 and an efficient multiplier (1, 2, 3, 4, 5, 8, 9). | |||
43635 | if (N->getValueType(0) == MVT::i32 || N->getValueType(0) == MVT::i64) { | |||
43636 | APInt Diff = TrueC->getAPIntValue() - FalseC->getAPIntValue(); | |||
43637 | assert(Diff.getBitWidth() == N->getValueType(0).getSizeInBits() &&(static_cast <bool> (Diff.getBitWidth() == N->getValueType (0).getSizeInBits() && "Implicit constant truncation" ) ? void (0) : __assert_fail ("Diff.getBitWidth() == N->getValueType(0).getSizeInBits() && \"Implicit constant truncation\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 43638, __extension__ __PRETTY_FUNCTION__)) | |||
43638 | "Implicit constant truncation")(static_cast <bool> (Diff.getBitWidth() == N->getValueType (0).getSizeInBits() && "Implicit constant truncation" ) ? void (0) : __assert_fail ("Diff.getBitWidth() == N->getValueType(0).getSizeInBits() && \"Implicit constant truncation\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 43638, __extension__ __PRETTY_FUNCTION__)); | |||
43639 | ||||
43640 | bool isFastMultiplier = false; | |||
43641 | if (Diff.ult(10)) { | |||
43642 | switch (Diff.getZExtValue()) { | |||
43643 | default: break; | |||
43644 | case 1: // result = add base, cond | |||
43645 | case 2: // result = lea base( , cond*2) | |||
43646 | case 3: // result = lea base(cond, cond*2) | |||
43647 | case 4: // result = lea base( , cond*4) | |||
43648 | case 5: // result = lea base(cond, cond*4) | |||
43649 | case 8: // result = lea base( , cond*8) | |||
43650 | case 9: // result = lea base(cond, cond*8) | |||
43651 | isFastMultiplier = true; | |||
43652 | break; | |||
43653 | } | |||
43654 | } | |||
43655 | ||||
43656 | if (isFastMultiplier) { | |||
43657 | Cond = getSETCC(CC, Cond, DL ,DAG); | |||
43658 | // Zero extend the condition if needed. | |||
43659 | Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, FalseC->getValueType(0), | |||
43660 | Cond); | |||
43661 | // Scale the condition by the difference. | |||
43662 | if (Diff != 1) | |||
43663 | Cond = DAG.getNode(ISD::MUL, DL, Cond.getValueType(), Cond, | |||
43664 | DAG.getConstant(Diff, DL, Cond.getValueType())); | |||
43665 | ||||
43666 | // Add the base if non-zero. | |||
43667 | if (FalseC->getAPIntValue() != 0) | |||
43668 | Cond = DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond, | |||
43669 | SDValue(FalseC, 0)); | |||
43670 | return Cond; | |||
43671 | } | |||
43672 | } | |||
43673 | } | |||
43674 | } | |||
43675 | ||||
43676 | // Handle these cases: | |||
43677 | // (select (x != c), e, c) -> select (x != c), e, x), | |||
43678 | // (select (x == c), c, e) -> select (x == c), x, e) | |||
43679 | // where the c is an integer constant, and the "select" is the combination | |||
43680 | // of CMOV and CMP. | |||
43681 | // | |||
43682 | // The rationale for this change is that the conditional-move from a constant | |||
43683 | // needs two instructions, however, conditional-move from a register needs | |||
43684 | // only one instruction. | |||
43685 | // | |||
43686 | // CAVEAT: By replacing a constant with a symbolic value, it may obscure | |||
43687 | // some instruction-combining opportunities. This opt needs to be | |||
43688 | // postponed as late as possible. | |||
43689 | // | |||
43690 | if (!DCI.isBeforeLegalize() && !DCI.isBeforeLegalizeOps()) { | |||
43691 | // the DCI.xxxx conditions are provided to postpone the optimization as | |||
43692 | // late as possible. | |||
43693 | ||||
43694 | ConstantSDNode *CmpAgainst = nullptr; | |||
43695 | if ((Cond.getOpcode() == X86ISD::CMP || Cond.getOpcode() == X86ISD::SUB) && | |||
43696 | (CmpAgainst = dyn_cast<ConstantSDNode>(Cond.getOperand(1))) && | |||
43697 | !isa<ConstantSDNode>(Cond.getOperand(0))) { | |||
43698 | ||||
43699 | if (CC == X86::COND_NE && | |||
43700 | CmpAgainst == dyn_cast<ConstantSDNode>(FalseOp)) { | |||
43701 | CC = X86::GetOppositeBranchCondition(CC); | |||
43702 | std::swap(TrueOp, FalseOp); | |||
43703 | } | |||
43704 | ||||
43705 | if (CC == X86::COND_E && | |||
43706 | CmpAgainst == dyn_cast<ConstantSDNode>(TrueOp)) { | |||
43707 | SDValue Ops[] = {FalseOp, Cond.getOperand(0), | |||
43708 | DAG.getTargetConstant(CC, DL, MVT::i8), Cond}; | |||
43709 | return DAG.getNode(X86ISD::CMOV, DL, N->getValueType(0), Ops); | |||
43710 | } | |||
43711 | } | |||
43712 | } | |||
43713 | ||||
43714 | // Fold and/or of setcc's to double CMOV: | |||
43715 | // (CMOV F, T, ((cc1 | cc2) != 0)) -> (CMOV (CMOV F, T, cc1), T, cc2) | |||
43716 | // (CMOV F, T, ((cc1 & cc2) != 0)) -> (CMOV (CMOV T, F, !cc1), F, !cc2) | |||
43717 | // | |||
43718 | // This combine lets us generate: | |||
43719 | // cmovcc1 (jcc1 if we don't have CMOV) | |||
43720 | // cmovcc2 (same) | |||
43721 | // instead of: | |||
43722 | // setcc1 | |||
43723 | // setcc2 | |||
43724 | // and/or | |||
43725 | // cmovne (jne if we don't have CMOV) | |||
43726 | // When we can't use the CMOV instruction, it might increase branch | |||
43727 | // mispredicts. | |||
43728 | // When we can use CMOV, or when there is no mispredict, this improves | |||
43729 | // throughput and reduces register pressure. | |||
43730 | // | |||
43731 | if (CC == X86::COND_NE) { | |||
43732 | SDValue Flags; | |||
43733 | X86::CondCode CC0, CC1; | |||
43734 | bool isAndSetCC; | |||
43735 | if (checkBoolTestAndOrSetCCCombine(Cond, CC0, CC1, Flags, isAndSetCC)) { | |||
43736 | if (isAndSetCC) { | |||
43737 | std::swap(FalseOp, TrueOp); | |||
43738 | CC0 = X86::GetOppositeBranchCondition(CC0); | |||
43739 | CC1 = X86::GetOppositeBranchCondition(CC1); | |||
43740 | } | |||
43741 | ||||
43742 | SDValue LOps[] = {FalseOp, TrueOp, | |||
43743 | DAG.getTargetConstant(CC0, DL, MVT::i8), Flags}; | |||
43744 | SDValue LCMOV = DAG.getNode(X86ISD::CMOV, DL, N->getValueType(0), LOps); | |||
43745 | SDValue Ops[] = {LCMOV, TrueOp, DAG.getTargetConstant(CC1, DL, MVT::i8), | |||
43746 | Flags}; | |||
43747 | SDValue CMOV = DAG.getNode(X86ISD::CMOV, DL, N->getValueType(0), Ops); | |||
43748 | return CMOV; | |||
43749 | } | |||
43750 | } | |||
43751 | ||||
43752 | // Fold (CMOV C1, (ADD (CTTZ X), C2), (X != 0)) -> | |||
43753 | // (ADD (CMOV C1-C2, (CTTZ X), (X != 0)), C2) | |||
43754 | // Or (CMOV (ADD (CTTZ X), C2), C1, (X == 0)) -> | |||
43755 | // (ADD (CMOV (CTTZ X), C1-C2, (X == 0)), C2) | |||
43756 | if ((CC == X86::COND_NE || CC == X86::COND_E) && | |||
43757 | Cond.getOpcode() == X86ISD::CMP && isNullConstant(Cond.getOperand(1))) { | |||
43758 | SDValue Add = TrueOp; | |||
43759 | SDValue Const = FalseOp; | |||
43760 | // Canonicalize the condition code for easier matching and output. | |||
43761 | if (CC == X86::COND_E) | |||
43762 | std::swap(Add, Const); | |||
43763 | ||||
43764 | // We might have replaced the constant in the cmov with the LHS of the | |||
43765 | // compare. If so change it to the RHS of the compare. | |||
43766 | if (Const == Cond.getOperand(0)) | |||
43767 | Const = Cond.getOperand(1); | |||
43768 | ||||
43769 | // Ok, now make sure that Add is (add (cttz X), C2) and Const is a constant. | |||
43770 | if (isa<ConstantSDNode>(Const) && Add.getOpcode() == ISD::ADD && | |||
43771 | Add.hasOneUse() && isa<ConstantSDNode>(Add.getOperand(1)) && | |||
43772 | (Add.getOperand(0).getOpcode() == ISD::CTTZ_ZERO_UNDEF || | |||
43773 | Add.getOperand(0).getOpcode() == ISD::CTTZ) && | |||
43774 | Add.getOperand(0).getOperand(0) == Cond.getOperand(0)) { | |||
43775 | EVT VT = N->getValueType(0); | |||
43776 | // This should constant fold. | |||
43777 | SDValue Diff = DAG.getNode(ISD::SUB, DL, VT, Const, Add.getOperand(1)); | |||
43778 | SDValue CMov = | |||
43779 | DAG.getNode(X86ISD::CMOV, DL, VT, Diff, Add.getOperand(0), | |||
43780 | DAG.getTargetConstant(X86::COND_NE, DL, MVT::i8), Cond); | |||
43781 | return DAG.getNode(ISD::ADD, DL, VT, CMov, Add.getOperand(1)); | |||
43782 | } | |||
43783 | } | |||
43784 | ||||
43785 | return SDValue(); | |||
43786 | } | |||
43787 | ||||
43788 | /// Different mul shrinking modes. | |||
43789 | enum class ShrinkMode { MULS8, MULU8, MULS16, MULU16 }; | |||
43790 | ||||
43791 | static bool canReduceVMulWidth(SDNode *N, SelectionDAG &DAG, ShrinkMode &Mode) { | |||
43792 | EVT VT = N->getOperand(0).getValueType(); | |||
43793 | if (VT.getScalarSizeInBits() != 32) | |||
43794 | return false; | |||
43795 | ||||
43796 | assert(N->getNumOperands() == 2 && "NumOperands of Mul are 2")(static_cast <bool> (N->getNumOperands() == 2 && "NumOperands of Mul are 2") ? void (0) : __assert_fail ("N->getNumOperands() == 2 && \"NumOperands of Mul are 2\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 43796, __extension__ __PRETTY_FUNCTION__)); | |||
43797 | unsigned SignBits[2] = {1, 1}; | |||
43798 | bool IsPositive[2] = {false, false}; | |||
43799 | for (unsigned i = 0; i < 2; i++) { | |||
43800 | SDValue Opd = N->getOperand(i); | |||
43801 | ||||
43802 | SignBits[i] = DAG.ComputeNumSignBits(Opd); | |||
43803 | IsPositive[i] = DAG.SignBitIsZero(Opd); | |||
43804 | } | |||
43805 | ||||
43806 | bool AllPositive = IsPositive[0] && IsPositive[1]; | |||
43807 | unsigned MinSignBits = std::min(SignBits[0], SignBits[1]); | |||
43808 | // When ranges are from -128 ~ 127, use MULS8 mode. | |||
43809 | if (MinSignBits >= 25) | |||
43810 | Mode = ShrinkMode::MULS8; | |||
43811 | // When ranges are from 0 ~ 255, use MULU8 mode. | |||
43812 | else if (AllPositive && MinSignBits >= 24) | |||
43813 | Mode = ShrinkMode::MULU8; | |||
43814 | // When ranges are from -32768 ~ 32767, use MULS16 mode. | |||
43815 | else if (MinSignBits >= 17) | |||
43816 | Mode = ShrinkMode::MULS16; | |||
43817 | // When ranges are from 0 ~ 65535, use MULU16 mode. | |||
43818 | else if (AllPositive && MinSignBits >= 16) | |||
43819 | Mode = ShrinkMode::MULU16; | |||
43820 | else | |||
43821 | return false; | |||
43822 | return true; | |||
43823 | } | |||
43824 | ||||
43825 | /// When the operands of vector mul are extended from smaller size values, | |||
43826 | /// like i8 and i16, the type of mul may be shrinked to generate more | |||
43827 | /// efficient code. Two typical patterns are handled: | |||
43828 | /// Pattern1: | |||
43829 | /// %2 = sext/zext <N x i8> %1 to <N x i32> | |||
43830 | /// %4 = sext/zext <N x i8> %3 to <N x i32> | |||
43831 | // or %4 = build_vector <N x i32> %C1, ..., %CN (%C1..%CN are constants) | |||
43832 | /// %5 = mul <N x i32> %2, %4 | |||
43833 | /// | |||
43834 | /// Pattern2: | |||
43835 | /// %2 = zext/sext <N x i16> %1 to <N x i32> | |||
43836 | /// %4 = zext/sext <N x i16> %3 to <N x i32> | |||
43837 | /// or %4 = build_vector <N x i32> %C1, ..., %CN (%C1..%CN are constants) | |||
43838 | /// %5 = mul <N x i32> %2, %4 | |||
43839 | /// | |||
43840 | /// There are four mul shrinking modes: | |||
43841 | /// If %2 == sext32(trunc8(%2)), i.e., the scalar value range of %2 is | |||
43842 | /// -128 to 128, and the scalar value range of %4 is also -128 to 128, | |||
43843 | /// generate pmullw+sext32 for it (MULS8 mode). | |||
43844 | /// If %2 == zext32(trunc8(%2)), i.e., the scalar value range of %2 is | |||
43845 | /// 0 to 255, and the scalar value range of %4 is also 0 to 255, | |||
43846 | /// generate pmullw+zext32 for it (MULU8 mode). | |||
43847 | /// If %2 == sext32(trunc16(%2)), i.e., the scalar value range of %2 is | |||
43848 | /// -32768 to 32767, and the scalar value range of %4 is also -32768 to 32767, | |||
43849 | /// generate pmullw+pmulhw for it (MULS16 mode). | |||
43850 | /// If %2 == zext32(trunc16(%2)), i.e., the scalar value range of %2 is | |||
43851 | /// 0 to 65535, and the scalar value range of %4 is also 0 to 65535, | |||
43852 | /// generate pmullw+pmulhuw for it (MULU16 mode). | |||
43853 | static SDValue reduceVMULWidth(SDNode *N, SelectionDAG &DAG, | |||
43854 | const X86Subtarget &Subtarget) { | |||
43855 | // Check for legality | |||
43856 | // pmullw/pmulhw are not supported by SSE. | |||
43857 | if (!Subtarget.hasSSE2()) | |||
43858 | return SDValue(); | |||
43859 | ||||
43860 | // Check for profitability | |||
43861 | // pmulld is supported since SSE41. It is better to use pmulld | |||
43862 | // instead of pmullw+pmulhw, except for subtargets where pmulld is slower than | |||
43863 | // the expansion. | |||
43864 | bool OptForMinSize = DAG.getMachineFunction().getFunction().hasMinSize(); | |||
43865 | if (Subtarget.hasSSE41() && (OptForMinSize || !Subtarget.isPMULLDSlow())) | |||
43866 | return SDValue(); | |||
43867 | ||||
43868 | ShrinkMode Mode; | |||
43869 | if (!canReduceVMulWidth(N, DAG, Mode)) | |||
43870 | return SDValue(); | |||
43871 | ||||
43872 | SDLoc DL(N); | |||
43873 | SDValue N0 = N->getOperand(0); | |||
43874 | SDValue N1 = N->getOperand(1); | |||
43875 | EVT VT = N->getOperand(0).getValueType(); | |||
43876 | unsigned NumElts = VT.getVectorNumElements(); | |||
43877 | if ((NumElts % 2) != 0) | |||
43878 | return SDValue(); | |||
43879 | ||||
43880 | EVT ReducedVT = EVT::getVectorVT(*DAG.getContext(), MVT::i16, NumElts); | |||
43881 | ||||
43882 | // Shrink the operands of mul. | |||
43883 | SDValue NewN0 = DAG.getNode(ISD::TRUNCATE, DL, ReducedVT, N0); | |||
43884 | SDValue NewN1 = DAG.getNode(ISD::TRUNCATE, DL, ReducedVT, N1); | |||
43885 | ||||
43886 | // Generate the lower part of mul: pmullw. For MULU8/MULS8, only the | |||
43887 | // lower part is needed. | |||
43888 | SDValue MulLo = DAG.getNode(ISD::MUL, DL, ReducedVT, NewN0, NewN1); | |||
43889 | if (Mode == ShrinkMode::MULU8 || Mode == ShrinkMode::MULS8) | |||
43890 | return DAG.getNode((Mode == ShrinkMode::MULU8) ? ISD::ZERO_EXTEND | |||
43891 | : ISD::SIGN_EXTEND, | |||
43892 | DL, VT, MulLo); | |||
43893 | ||||
43894 | EVT ResVT = EVT::getVectorVT(*DAG.getContext(), MVT::i32, NumElts / 2); | |||
43895 | // Generate the higher part of mul: pmulhw/pmulhuw. For MULU16/MULS16, | |||
43896 | // the higher part is also needed. | |||
43897 | SDValue MulHi = | |||
43898 | DAG.getNode(Mode == ShrinkMode::MULS16 ? ISD::MULHS : ISD::MULHU, DL, | |||
43899 | ReducedVT, NewN0, NewN1); | |||
43900 | ||||
43901 | // Repack the lower part and higher part result of mul into a wider | |||
43902 | // result. | |||
43903 | // Generate shuffle functioning as punpcklwd. | |||
43904 | SmallVector<int, 16> ShuffleMask(NumElts); | |||
43905 | for (unsigned i = 0, e = NumElts / 2; i < e; i++) { | |||
43906 | ShuffleMask[2 * i] = i; | |||
43907 | ShuffleMask[2 * i + 1] = i + NumElts; | |||
43908 | } | |||
43909 | SDValue ResLo = | |||
43910 | DAG.getVectorShuffle(ReducedVT, DL, MulLo, MulHi, ShuffleMask); | |||
43911 | ResLo = DAG.getBitcast(ResVT, ResLo); | |||
43912 | // Generate shuffle functioning as punpckhwd. | |||
43913 | for (unsigned i = 0, e = NumElts / 2; i < e; i++) { | |||
43914 | ShuffleMask[2 * i] = i + NumElts / 2; | |||
43915 | ShuffleMask[2 * i + 1] = i + NumElts * 3 / 2; | |||
43916 | } | |||
43917 | SDValue ResHi = | |||
43918 | DAG.getVectorShuffle(ReducedVT, DL, MulLo, MulHi, ShuffleMask); | |||
43919 | ResHi = DAG.getBitcast(ResVT, ResHi); | |||
43920 | return DAG.getNode(ISD::CONCAT_VECTORS, DL, VT, ResLo, ResHi); | |||
43921 | } | |||
43922 | ||||
43923 | static SDValue combineMulSpecial(uint64_t MulAmt, SDNode *N, SelectionDAG &DAG, | |||
43924 | EVT VT, const SDLoc &DL) { | |||
43925 | ||||
43926 | auto combineMulShlAddOrSub = [&](int Mult, int Shift, bool isAdd) { | |||
43927 | SDValue Result = DAG.getNode(X86ISD::MUL_IMM, DL, VT, N->getOperand(0), | |||
43928 | DAG.getConstant(Mult, DL, VT)); | |||
43929 | Result = DAG.getNode(ISD::SHL, DL, VT, Result, | |||
43930 | DAG.getConstant(Shift, DL, MVT::i8)); | |||
43931 | Result = DAG.getNode(isAdd ? ISD::ADD : ISD::SUB, DL, VT, Result, | |||
43932 | N->getOperand(0)); | |||
43933 | return Result; | |||
43934 | }; | |||
43935 | ||||
43936 | auto combineMulMulAddOrSub = [&](int Mul1, int Mul2, bool isAdd) { | |||
43937 | SDValue Result = DAG.getNode(X86ISD::MUL_IMM, DL, VT, N->getOperand(0), | |||
43938 | DAG.getConstant(Mul1, DL, VT)); | |||
43939 | Result = DAG.getNode(X86ISD::MUL_IMM, DL, VT, Result, | |||
43940 | DAG.getConstant(Mul2, DL, VT)); | |||
43941 | Result = DAG.getNode(isAdd ? ISD::ADD : ISD::SUB, DL, VT, Result, | |||
43942 | N->getOperand(0)); | |||
43943 | return Result; | |||
43944 | }; | |||
43945 | ||||
43946 | switch (MulAmt) { | |||
43947 | default: | |||
43948 | break; | |||
43949 | case 11: | |||
43950 | // mul x, 11 => add ((shl (mul x, 5), 1), x) | |||
43951 | return combineMulShlAddOrSub(5, 1, /*isAdd*/ true); | |||
43952 | case 21: | |||
43953 | // mul x, 21 => add ((shl (mul x, 5), 2), x) | |||
43954 | return combineMulShlAddOrSub(5, 2, /*isAdd*/ true); | |||
43955 | case 41: | |||
43956 | // mul x, 41 => add ((shl (mul x, 5), 3), x) | |||
43957 | return combineMulShlAddOrSub(5, 3, /*isAdd*/ true); | |||
43958 | case 22: | |||
43959 | // mul x, 22 => add (add ((shl (mul x, 5), 2), x), x) | |||
43960 | return DAG.getNode(ISD::ADD, DL, VT, N->getOperand(0), | |||
43961 | combineMulShlAddOrSub(5, 2, /*isAdd*/ true)); | |||
43962 | case 19: | |||
43963 | // mul x, 19 => add ((shl (mul x, 9), 1), x) | |||
43964 | return combineMulShlAddOrSub(9, 1, /*isAdd*/ true); | |||
43965 | case 37: | |||
43966 | // mul x, 37 => add ((shl (mul x, 9), 2), x) | |||
43967 | return combineMulShlAddOrSub(9, 2, /*isAdd*/ true); | |||
43968 | case 73: | |||
43969 | // mul x, 73 => add ((shl (mul x, 9), 3), x) | |||
43970 | return combineMulShlAddOrSub(9, 3, /*isAdd*/ true); | |||
43971 | case 13: | |||
43972 | // mul x, 13 => add ((shl (mul x, 3), 2), x) | |||
43973 | return combineMulShlAddOrSub(3, 2, /*isAdd*/ true); | |||
43974 | case 23: | |||
43975 | // mul x, 23 => sub ((shl (mul x, 3), 3), x) | |||
43976 | return combineMulShlAddOrSub(3, 3, /*isAdd*/ false); | |||
43977 | case 26: | |||
43978 | // mul x, 26 => add ((mul (mul x, 5), 5), x) | |||
43979 | return combineMulMulAddOrSub(5, 5, /*isAdd*/ true); | |||
43980 | case 28: | |||
43981 | // mul x, 28 => add ((mul (mul x, 9), 3), x) | |||
43982 | return combineMulMulAddOrSub(9, 3, /*isAdd*/ true); | |||
43983 | case 29: | |||
43984 | // mul x, 29 => add (add ((mul (mul x, 9), 3), x), x) | |||
43985 | return DAG.getNode(ISD::ADD, DL, VT, N->getOperand(0), | |||
43986 | combineMulMulAddOrSub(9, 3, /*isAdd*/ true)); | |||
43987 | } | |||
43988 | ||||
43989 | // Another trick. If this is a power 2 + 2/4/8, we can use a shift followed | |||
43990 | // by a single LEA. | |||
43991 | // First check if this a sum of two power of 2s because that's easy. Then | |||
43992 | // count how many zeros are up to the first bit. | |||
43993 | // TODO: We can do this even without LEA at a cost of two shifts and an add. | |||
43994 | if (isPowerOf2_64(MulAmt & (MulAmt - 1))) { | |||
43995 | unsigned ScaleShift = countTrailingZeros(MulAmt); | |||
43996 | if (ScaleShift >= 1 && ScaleShift < 4) { | |||
43997 | unsigned ShiftAmt = Log2_64((MulAmt & (MulAmt - 1))); | |||
43998 | SDValue Shift1 = DAG.getNode(ISD::SHL, DL, VT, N->getOperand(0), | |||
43999 | DAG.getConstant(ShiftAmt, DL, MVT::i8)); | |||
44000 | SDValue Shift2 = DAG.getNode(ISD::SHL, DL, VT, N->getOperand(0), | |||
44001 | DAG.getConstant(ScaleShift, DL, MVT::i8)); | |||
44002 | return DAG.getNode(ISD::ADD, DL, VT, Shift1, Shift2); | |||
44003 | } | |||
44004 | } | |||
44005 | ||||
44006 | return SDValue(); | |||
44007 | } | |||
44008 | ||||
44009 | // If the upper 17 bits of each element are zero then we can use PMADDWD, | |||
44010 | // which is always at least as quick as PMULLD, except on KNL. | |||
44011 | static SDValue combineMulToPMADDWD(SDNode *N, SelectionDAG &DAG, | |||
44012 | const X86Subtarget &Subtarget) { | |||
44013 | if (!Subtarget.hasSSE2()) | |||
44014 | return SDValue(); | |||
44015 | ||||
44016 | if (Subtarget.isPMADDWDSlow()) | |||
44017 | return SDValue(); | |||
44018 | ||||
44019 | EVT VT = N->getValueType(0); | |||
44020 | ||||
44021 | // Only support vXi32 vectors. | |||
44022 | if (!VT.isVector() || VT.getVectorElementType() != MVT::i32) | |||
44023 | return SDValue(); | |||
44024 | ||||
44025 | // Make sure the type is legal or will be widened to a legal type. | |||
44026 | if (VT != MVT::v2i32 && !DAG.getTargetLoweringInfo().isTypeLegal(VT)) | |||
44027 | return SDValue(); | |||
44028 | ||||
44029 | MVT WVT = MVT::getVectorVT(MVT::i16, 2 * VT.getVectorNumElements()); | |||
44030 | ||||
44031 | // Without BWI, we would need to split v32i16. | |||
44032 | if (WVT == MVT::v32i16 && !Subtarget.hasBWI()) | |||
44033 | return SDValue(); | |||
44034 | ||||
44035 | SDValue N0 = N->getOperand(0); | |||
44036 | SDValue N1 = N->getOperand(1); | |||
44037 | ||||
44038 | // If we are zero extending two steps without SSE4.1, its better to reduce | |||
44039 | // the vmul width instead. | |||
44040 | if (!Subtarget.hasSSE41() && | |||
44041 | (N0.getOpcode() == ISD::ZERO_EXTEND && | |||
44042 | N0.getOperand(0).getScalarValueSizeInBits() <= 8) && | |||
44043 | (N1.getOpcode() == ISD::ZERO_EXTEND && | |||
44044 | N1.getOperand(0).getScalarValueSizeInBits() <= 8)) | |||
44045 | return SDValue(); | |||
44046 | ||||
44047 | APInt Mask17 = APInt::getHighBitsSet(32, 17); | |||
44048 | if (!DAG.MaskedValueIsZero(N1, Mask17) || | |||
44049 | !DAG.MaskedValueIsZero(N0, Mask17)) | |||
44050 | return SDValue(); | |||
44051 | ||||
44052 | // Use SplitOpsAndApply to handle AVX splitting. | |||
44053 | auto PMADDWDBuilder = [](SelectionDAG &DAG, const SDLoc &DL, | |||
44054 | ArrayRef<SDValue> Ops) { | |||
44055 | MVT OpVT = MVT::getVectorVT(MVT::i32, Ops[0].getValueSizeInBits() / 32); | |||
44056 | return DAG.getNode(X86ISD::VPMADDWD, DL, OpVT, Ops); | |||
44057 | }; | |||
44058 | return SplitOpsAndApply(DAG, Subtarget, SDLoc(N), VT, | |||
44059 | { DAG.getBitcast(WVT, N0), DAG.getBitcast(WVT, N1) }, | |||
44060 | PMADDWDBuilder); | |||
44061 | } | |||
44062 | ||||
44063 | static SDValue combineMulToPMULDQ(SDNode *N, SelectionDAG &DAG, | |||
44064 | const X86Subtarget &Subtarget) { | |||
44065 | if (!Subtarget.hasSSE2()) | |||
44066 | return SDValue(); | |||
44067 | ||||
44068 | EVT VT = N->getValueType(0); | |||
44069 | ||||
44070 | // Only support vXi64 vectors. | |||
44071 | if (!VT.isVector() || VT.getVectorElementType() != MVT::i64 || | |||
44072 | VT.getVectorNumElements() < 2 || | |||
44073 | !isPowerOf2_32(VT.getVectorNumElements())) | |||
44074 | return SDValue(); | |||
44075 | ||||
44076 | SDValue N0 = N->getOperand(0); | |||
44077 | SDValue N1 = N->getOperand(1); | |||
44078 | ||||
44079 | // MULDQ returns the 64-bit result of the signed multiplication of the lower | |||
44080 | // 32-bits. We can lower with this if the sign bits stretch that far. | |||
44081 | if (Subtarget.hasSSE41() && DAG.ComputeNumSignBits(N0) > 32 && | |||
44082 | DAG.ComputeNumSignBits(N1) > 32) { | |||
44083 | auto PMULDQBuilder = [](SelectionDAG &DAG, const SDLoc &DL, | |||
44084 | ArrayRef<SDValue> Ops) { | |||
44085 | return DAG.getNode(X86ISD::PMULDQ, DL, Ops[0].getValueType(), Ops); | |||
44086 | }; | |||
44087 | return SplitOpsAndApply(DAG, Subtarget, SDLoc(N), VT, { N0, N1 }, | |||
44088 | PMULDQBuilder, /*CheckBWI*/false); | |||
44089 | } | |||
44090 | ||||
44091 | // If the upper bits are zero we can use a single pmuludq. | |||
44092 | APInt Mask = APInt::getHighBitsSet(64, 32); | |||
44093 | if (DAG.MaskedValueIsZero(N0, Mask) && DAG.MaskedValueIsZero(N1, Mask)) { | |||
44094 | auto PMULUDQBuilder = [](SelectionDAG &DAG, const SDLoc &DL, | |||
44095 | ArrayRef<SDValue> Ops) { | |||
44096 | return DAG.getNode(X86ISD::PMULUDQ, DL, Ops[0].getValueType(), Ops); | |||
44097 | }; | |||
44098 | return SplitOpsAndApply(DAG, Subtarget, SDLoc(N), VT, { N0, N1 }, | |||
44099 | PMULUDQBuilder, /*CheckBWI*/false); | |||
44100 | } | |||
44101 | ||||
44102 | return SDValue(); | |||
44103 | } | |||
44104 | ||||
44105 | static SDValue combineMul(SDNode *N, SelectionDAG &DAG, | |||
44106 | TargetLowering::DAGCombinerInfo &DCI, | |||
44107 | const X86Subtarget &Subtarget) { | |||
44108 | EVT VT = N->getValueType(0); | |||
44109 | ||||
44110 | if (SDValue V = combineMulToPMADDWD(N, DAG, Subtarget)) | |||
44111 | return V; | |||
44112 | ||||
44113 | if (SDValue V = combineMulToPMULDQ(N, DAG, Subtarget)) | |||
44114 | return V; | |||
44115 | ||||
44116 | if (DCI.isBeforeLegalize() && VT.isVector()) | |||
44117 | return reduceVMULWidth(N, DAG, Subtarget); | |||
44118 | ||||
44119 | // Optimize a single multiply with constant into two operations in order to | |||
44120 | // implement it with two cheaper instructions, e.g. LEA + SHL, LEA + LEA. | |||
44121 | if (!MulConstantOptimization) | |||
44122 | return SDValue(); | |||
44123 | ||||
44124 | // An imul is usually smaller than the alternative sequence. | |||
44125 | if (DAG.getMachineFunction().getFunction().hasMinSize()) | |||
44126 | return SDValue(); | |||
44127 | ||||
44128 | if (DCI.isBeforeLegalize() || DCI.isCalledByLegalizer()) | |||
44129 | return SDValue(); | |||
44130 | ||||
44131 | if (VT != MVT::i64 && VT != MVT::i32) | |||
44132 | return SDValue(); | |||
44133 | ||||
44134 | ConstantSDNode *C = dyn_cast<ConstantSDNode>(N->getOperand(1)); | |||
44135 | if (!C) | |||
44136 | return SDValue(); | |||
44137 | if (isPowerOf2_64(C->getZExtValue())) | |||
44138 | return SDValue(); | |||
44139 | ||||
44140 | int64_t SignMulAmt = C->getSExtValue(); | |||
44141 | assert(SignMulAmt != INT64_MIN && "Int min should have been handled!")(static_cast <bool> (SignMulAmt != (-9223372036854775807L -1) && "Int min should have been handled!") ? void ( 0) : __assert_fail ("SignMulAmt != INT64_MIN && \"Int min should have been handled!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 44141, __extension__ __PRETTY_FUNCTION__)); | |||
44142 | uint64_t AbsMulAmt = SignMulAmt < 0 ? -SignMulAmt : SignMulAmt; | |||
44143 | ||||
44144 | SDLoc DL(N); | |||
44145 | if (AbsMulAmt == 3 || AbsMulAmt == 5 || AbsMulAmt == 9) { | |||
44146 | SDValue NewMul = DAG.getNode(X86ISD::MUL_IMM, DL, VT, N->getOperand(0), | |||
44147 | DAG.getConstant(AbsMulAmt, DL, VT)); | |||
44148 | if (SignMulAmt < 0) | |||
44149 | NewMul = DAG.getNode(ISD::SUB, DL, VT, DAG.getConstant(0, DL, VT), | |||
44150 | NewMul); | |||
44151 | ||||
44152 | return NewMul; | |||
44153 | } | |||
44154 | ||||
44155 | uint64_t MulAmt1 = 0; | |||
44156 | uint64_t MulAmt2 = 0; | |||
44157 | if ((AbsMulAmt % 9) == 0) { | |||
44158 | MulAmt1 = 9; | |||
44159 | MulAmt2 = AbsMulAmt / 9; | |||
44160 | } else if ((AbsMulAmt % 5) == 0) { | |||
44161 | MulAmt1 = 5; | |||
44162 | MulAmt2 = AbsMulAmt / 5; | |||
44163 | } else if ((AbsMulAmt % 3) == 0) { | |||
44164 | MulAmt1 = 3; | |||
44165 | MulAmt2 = AbsMulAmt / 3; | |||
44166 | } | |||
44167 | ||||
44168 | SDValue NewMul; | |||
44169 | // For negative multiply amounts, only allow MulAmt2 to be a power of 2. | |||
44170 | if (MulAmt2 && | |||
44171 | (isPowerOf2_64(MulAmt2) || | |||
44172 | (SignMulAmt >= 0 && (MulAmt2 == 3 || MulAmt2 == 5 || MulAmt2 == 9)))) { | |||
44173 | ||||
44174 | if (isPowerOf2_64(MulAmt2) && | |||
44175 | !(SignMulAmt >= 0 && N->hasOneUse() && | |||
44176 | N->use_begin()->getOpcode() == ISD::ADD)) | |||
44177 | // If second multiplifer is pow2, issue it first. We want the multiply by | |||
44178 | // 3, 5, or 9 to be folded into the addressing mode unless the lone use | |||
44179 | // is an add. Only do this for positive multiply amounts since the | |||
44180 | // negate would prevent it from being used as an address mode anyway. | |||
44181 | std::swap(MulAmt1, MulAmt2); | |||
44182 | ||||
44183 | if (isPowerOf2_64(MulAmt1)) | |||
44184 | NewMul = DAG.getNode(ISD::SHL, DL, VT, N->getOperand(0), | |||
44185 | DAG.getConstant(Log2_64(MulAmt1), DL, MVT::i8)); | |||
44186 | else | |||
44187 | NewMul = DAG.getNode(X86ISD::MUL_IMM, DL, VT, N->getOperand(0), | |||
44188 | DAG.getConstant(MulAmt1, DL, VT)); | |||
44189 | ||||
44190 | if (isPowerOf2_64(MulAmt2)) | |||
44191 | NewMul = DAG.getNode(ISD::SHL, DL, VT, NewMul, | |||
44192 | DAG.getConstant(Log2_64(MulAmt2), DL, MVT::i8)); | |||
44193 | else | |||
44194 | NewMul = DAG.getNode(X86ISD::MUL_IMM, DL, VT, NewMul, | |||
44195 | DAG.getConstant(MulAmt2, DL, VT)); | |||
44196 | ||||
44197 | // Negate the result. | |||
44198 | if (SignMulAmt < 0) | |||
44199 | NewMul = DAG.getNode(ISD::SUB, DL, VT, DAG.getConstant(0, DL, VT), | |||
44200 | NewMul); | |||
44201 | } else if (!Subtarget.slowLEA()) | |||
44202 | NewMul = combineMulSpecial(C->getZExtValue(), N, DAG, VT, DL); | |||
44203 | ||||
44204 | if (!NewMul) { | |||
44205 | assert(C->getZExtValue() != 0 &&(static_cast <bool> (C->getZExtValue() != 0 && C->getZExtValue() != (VT == MVT::i64 ? (18446744073709551615UL ) : (4294967295U)) && "Both cases that could cause potential overflows should have " "already been handled.") ? void (0) : __assert_fail ("C->getZExtValue() != 0 && C->getZExtValue() != (VT == MVT::i64 ? UINT64_MAX : UINT32_MAX) && \"Both cases that could cause potential overflows should have \" \"already been handled.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 44208, __extension__ __PRETTY_FUNCTION__)) | |||
44206 | C->getZExtValue() != (VT == MVT::i64 ? UINT64_MAX : UINT32_MAX) &&(static_cast <bool> (C->getZExtValue() != 0 && C->getZExtValue() != (VT == MVT::i64 ? (18446744073709551615UL ) : (4294967295U)) && "Both cases that could cause potential overflows should have " "already been handled.") ? void (0) : __assert_fail ("C->getZExtValue() != 0 && C->getZExtValue() != (VT == MVT::i64 ? UINT64_MAX : UINT32_MAX) && \"Both cases that could cause potential overflows should have \" \"already been handled.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 44208, __extension__ __PRETTY_FUNCTION__)) | |||
44207 | "Both cases that could cause potential overflows should have "(static_cast <bool> (C->getZExtValue() != 0 && C->getZExtValue() != (VT == MVT::i64 ? (18446744073709551615UL ) : (4294967295U)) && "Both cases that could cause potential overflows should have " "already been handled.") ? void (0) : __assert_fail ("C->getZExtValue() != 0 && C->getZExtValue() != (VT == MVT::i64 ? UINT64_MAX : UINT32_MAX) && \"Both cases that could cause potential overflows should have \" \"already been handled.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 44208, __extension__ __PRETTY_FUNCTION__)) | |||
44208 | "already been handled.")(static_cast <bool> (C->getZExtValue() != 0 && C->getZExtValue() != (VT == MVT::i64 ? (18446744073709551615UL ) : (4294967295U)) && "Both cases that could cause potential overflows should have " "already been handled.") ? void (0) : __assert_fail ("C->getZExtValue() != 0 && C->getZExtValue() != (VT == MVT::i64 ? UINT64_MAX : UINT32_MAX) && \"Both cases that could cause potential overflows should have \" \"already been handled.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 44208, __extension__ __PRETTY_FUNCTION__)); | |||
44209 | if (isPowerOf2_64(AbsMulAmt - 1)) { | |||
44210 | // (mul x, 2^N + 1) => (add (shl x, N), x) | |||
44211 | NewMul = DAG.getNode( | |||
44212 | ISD::ADD, DL, VT, N->getOperand(0), | |||
44213 | DAG.getNode(ISD::SHL, DL, VT, N->getOperand(0), | |||
44214 | DAG.getConstant(Log2_64(AbsMulAmt - 1), DL, | |||
44215 | MVT::i8))); | |||
44216 | // To negate, subtract the number from zero | |||
44217 | if (SignMulAmt < 0) | |||
44218 | NewMul = DAG.getNode(ISD::SUB, DL, VT, | |||
44219 | DAG.getConstant(0, DL, VT), NewMul); | |||
44220 | } else if (isPowerOf2_64(AbsMulAmt + 1)) { | |||
44221 | // (mul x, 2^N - 1) => (sub (shl x, N), x) | |||
44222 | NewMul = DAG.getNode(ISD::SHL, DL, VT, N->getOperand(0), | |||
44223 | DAG.getConstant(Log2_64(AbsMulAmt + 1), | |||
44224 | DL, MVT::i8)); | |||
44225 | // To negate, reverse the operands of the subtract. | |||
44226 | if (SignMulAmt < 0) | |||
44227 | NewMul = DAG.getNode(ISD::SUB, DL, VT, N->getOperand(0), NewMul); | |||
44228 | else | |||
44229 | NewMul = DAG.getNode(ISD::SUB, DL, VT, NewMul, N->getOperand(0)); | |||
44230 | } else if (SignMulAmt >= 0 && isPowerOf2_64(AbsMulAmt - 2)) { | |||
44231 | // (mul x, 2^N + 2) => (add (add (shl x, N), x), x) | |||
44232 | NewMul = DAG.getNode(ISD::SHL, DL, VT, N->getOperand(0), | |||
44233 | DAG.getConstant(Log2_64(AbsMulAmt - 2), | |||
44234 | DL, MVT::i8)); | |||
44235 | NewMul = DAG.getNode(ISD::ADD, DL, VT, NewMul, N->getOperand(0)); | |||
44236 | NewMul = DAG.getNode(ISD::ADD, DL, VT, NewMul, N->getOperand(0)); | |||
44237 | } else if (SignMulAmt >= 0 && isPowerOf2_64(AbsMulAmt + 2)) { | |||
44238 | // (mul x, 2^N - 2) => (sub (sub (shl x, N), x), x) | |||
44239 | NewMul = DAG.getNode(ISD::SHL, DL, VT, N->getOperand(0), | |||
44240 | DAG.getConstant(Log2_64(AbsMulAmt + 2), | |||
44241 | DL, MVT::i8)); | |||
44242 | NewMul = DAG.getNode(ISD::SUB, DL, VT, NewMul, N->getOperand(0)); | |||
44243 | NewMul = DAG.getNode(ISD::SUB, DL, VT, NewMul, N->getOperand(0)); | |||
44244 | } | |||
44245 | } | |||
44246 | ||||
44247 | return NewMul; | |||
44248 | } | |||
44249 | ||||
44250 | // Try to form a MULHU or MULHS node by looking for | |||
44251 | // (srl (mul ext, ext), 16) | |||
44252 | // TODO: This is X86 specific because we want to be able to handle wide types | |||
44253 | // before type legalization. But we can only do it if the vector will be | |||
44254 | // legalized via widening/splitting. Type legalization can't handle promotion | |||
44255 | // of a MULHU/MULHS. There isn't a way to convey this to the generic DAG | |||
44256 | // combiner. | |||
44257 | static SDValue combineShiftToPMULH(SDNode *N, SelectionDAG &DAG, | |||
44258 | const X86Subtarget &Subtarget) { | |||
44259 | assert((N->getOpcode() == ISD::SRL || N->getOpcode() == ISD::SRA) &&(static_cast <bool> ((N->getOpcode() == ISD::SRL || N ->getOpcode() == ISD::SRA) && "SRL or SRA node is required here!" ) ? void (0) : __assert_fail ("(N->getOpcode() == ISD::SRL || N->getOpcode() == ISD::SRA) && \"SRL or SRA node is required here!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 44260, __extension__ __PRETTY_FUNCTION__)) | |||
44260 | "SRL or SRA node is required here!")(static_cast <bool> ((N->getOpcode() == ISD::SRL || N ->getOpcode() == ISD::SRA) && "SRL or SRA node is required here!" ) ? void (0) : __assert_fail ("(N->getOpcode() == ISD::SRL || N->getOpcode() == ISD::SRA) && \"SRL or SRA node is required here!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 44260, __extension__ __PRETTY_FUNCTION__)); | |||
44261 | SDLoc DL(N); | |||
44262 | ||||
44263 | // Only do this with SSE4.1. On earlier targets reduceVMULWidth will expand | |||
44264 | // the multiply. | |||
44265 | if (!Subtarget.hasSSE41()) | |||
44266 | return SDValue(); | |||
44267 | ||||
44268 | // The operation feeding into the shift must be a multiply. | |||
44269 | SDValue ShiftOperand = N->getOperand(0); | |||
44270 | if (ShiftOperand.getOpcode() != ISD::MUL || !ShiftOperand.hasOneUse()) | |||
44271 | return SDValue(); | |||
44272 | ||||
44273 | // Input type should be at least vXi32. | |||
44274 | EVT VT = N->getValueType(0); | |||
44275 | if (!VT.isVector() || VT.getVectorElementType().getSizeInBits() < 32) | |||
44276 | return SDValue(); | |||
44277 | ||||
44278 | // Need a shift by 16. | |||
44279 | APInt ShiftAmt; | |||
44280 | if (!ISD::isConstantSplatVector(N->getOperand(1).getNode(), ShiftAmt) || | |||
44281 | ShiftAmt != 16) | |||
44282 | return SDValue(); | |||
44283 | ||||
44284 | SDValue LHS = ShiftOperand.getOperand(0); | |||
44285 | SDValue RHS = ShiftOperand.getOperand(1); | |||
44286 | ||||
44287 | unsigned ExtOpc = LHS.getOpcode(); | |||
44288 | if ((ExtOpc != ISD::SIGN_EXTEND && ExtOpc != ISD::ZERO_EXTEND) || | |||
44289 | RHS.getOpcode() != ExtOpc) | |||
44290 | return SDValue(); | |||
44291 | ||||
44292 | // Peek through the extends. | |||
44293 | LHS = LHS.getOperand(0); | |||
44294 | RHS = RHS.getOperand(0); | |||
44295 | ||||
44296 | // Ensure the input types match. | |||
44297 | EVT MulVT = LHS.getValueType(); | |||
44298 | if (MulVT.getVectorElementType() != MVT::i16 || RHS.getValueType() != MulVT) | |||
44299 | return SDValue(); | |||
44300 | ||||
44301 | unsigned Opc = ExtOpc == ISD::SIGN_EXTEND ? ISD::MULHS : ISD::MULHU; | |||
44302 | SDValue Mulh = DAG.getNode(Opc, DL, MulVT, LHS, RHS); | |||
44303 | ||||
44304 | ExtOpc = N->getOpcode() == ISD::SRA ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND; | |||
44305 | return DAG.getNode(ExtOpc, DL, VT, Mulh); | |||
44306 | } | |||
44307 | ||||
44308 | static SDValue combineShiftLeft(SDNode *N, SelectionDAG &DAG) { | |||
44309 | SDValue N0 = N->getOperand(0); | |||
44310 | SDValue N1 = N->getOperand(1); | |||
44311 | ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1); | |||
44312 | EVT VT = N0.getValueType(); | |||
44313 | ||||
44314 | // fold (shl (and (setcc_c), c1), c2) -> (and setcc_c, (c1 << c2)) | |||
44315 | // since the result of setcc_c is all zero's or all ones. | |||
44316 | if (VT.isInteger() && !VT.isVector() && | |||
44317 | N1C && N0.getOpcode() == ISD::AND && | |||
44318 | N0.getOperand(1).getOpcode() == ISD::Constant) { | |||
44319 | SDValue N00 = N0.getOperand(0); | |||
44320 | APInt Mask = N0.getConstantOperandAPInt(1); | |||
44321 | Mask <<= N1C->getAPIntValue(); | |||
44322 | bool MaskOK = false; | |||
44323 | // We can handle cases concerning bit-widening nodes containing setcc_c if | |||
44324 | // we carefully interrogate the mask to make sure we are semantics | |||
44325 | // preserving. | |||
44326 | // The transform is not safe if the result of C1 << C2 exceeds the bitwidth | |||
44327 | // of the underlying setcc_c operation if the setcc_c was zero extended. | |||
44328 | // Consider the following example: | |||
44329 | // zext(setcc_c) -> i32 0x0000FFFF | |||
44330 | // c1 -> i32 0x0000FFFF | |||
44331 | // c2 -> i32 0x00000001 | |||
44332 | // (shl (and (setcc_c), c1), c2) -> i32 0x0001FFFE | |||
44333 | // (and setcc_c, (c1 << c2)) -> i32 0x0000FFFE | |||
44334 | if (N00.getOpcode() == X86ISD::SETCC_CARRY) { | |||
44335 | MaskOK = true; | |||
44336 | } else if (N00.getOpcode() == ISD::SIGN_EXTEND && | |||
44337 | N00.getOperand(0).getOpcode() == X86ISD::SETCC_CARRY) { | |||
44338 | MaskOK = true; | |||
44339 | } else if ((N00.getOpcode() == ISD::ZERO_EXTEND || | |||
44340 | N00.getOpcode() == ISD::ANY_EXTEND) && | |||
44341 | N00.getOperand(0).getOpcode() == X86ISD::SETCC_CARRY) { | |||
44342 | MaskOK = Mask.isIntN(N00.getOperand(0).getValueSizeInBits()); | |||
44343 | } | |||
44344 | if (MaskOK && Mask != 0) { | |||
44345 | SDLoc DL(N); | |||
44346 | return DAG.getNode(ISD::AND, DL, VT, N00, DAG.getConstant(Mask, DL, VT)); | |||
44347 | } | |||
44348 | } | |||
44349 | ||||
44350 | // Hardware support for vector shifts is sparse which makes us scalarize the | |||
44351 | // vector operations in many cases. Also, on sandybridge ADD is faster than | |||
44352 | // shl. | |||
44353 | // (shl V, 1) -> add V,V | |||
44354 | if (auto *N1BV = dyn_cast<BuildVectorSDNode>(N1)) | |||
44355 | if (auto *N1SplatC = N1BV->getConstantSplatNode()) { | |||
44356 | assert(N0.getValueType().isVector() && "Invalid vector shift type")(static_cast <bool> (N0.getValueType().isVector() && "Invalid vector shift type") ? void (0) : __assert_fail ("N0.getValueType().isVector() && \"Invalid vector shift type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 44356, __extension__ __PRETTY_FUNCTION__)); | |||
44357 | // We shift all of the values by one. In many cases we do not have | |||
44358 | // hardware support for this operation. This is better expressed as an ADD | |||
44359 | // of two values. | |||
44360 | if (N1SplatC->isOne()) | |||
44361 | return DAG.getNode(ISD::ADD, SDLoc(N), VT, N0, N0); | |||
44362 | } | |||
44363 | ||||
44364 | return SDValue(); | |||
44365 | } | |||
44366 | ||||
44367 | static SDValue combineShiftRightArithmetic(SDNode *N, SelectionDAG &DAG, | |||
44368 | const X86Subtarget &Subtarget) { | |||
44369 | SDValue N0 = N->getOperand(0); | |||
44370 | SDValue N1 = N->getOperand(1); | |||
44371 | EVT VT = N0.getValueType(); | |||
44372 | unsigned Size = VT.getSizeInBits(); | |||
44373 | ||||
44374 | if (SDValue V = combineShiftToPMULH(N, DAG, Subtarget)) | |||
44375 | return V; | |||
44376 | ||||
44377 | // fold (ashr (shl, a, [56,48,32,24,16]), SarConst) | |||
44378 | // into (shl, (sext (a), [56,48,32,24,16] - SarConst)) or | |||
44379 | // into (lshr, (sext (a), SarConst - [56,48,32,24,16])) | |||
44380 | // depending on sign of (SarConst - [56,48,32,24,16]) | |||
44381 | ||||
44382 | // sexts in X86 are MOVs. The MOVs have the same code size | |||
44383 | // as above SHIFTs (only SHIFT on 1 has lower code size). | |||
44384 | // However the MOVs have 2 advantages to a SHIFT: | |||
44385 | // 1. MOVs can write to a register that differs from source | |||
44386 | // 2. MOVs accept memory operands | |||
44387 | ||||
44388 | if (VT.isVector() || N1.getOpcode() != ISD::Constant || | |||
44389 | N0.getOpcode() != ISD::SHL || !N0.hasOneUse() || | |||
44390 | N0.getOperand(1).getOpcode() != ISD::Constant) | |||
44391 | return SDValue(); | |||
44392 | ||||
44393 | SDValue N00 = N0.getOperand(0); | |||
44394 | SDValue N01 = N0.getOperand(1); | |||
44395 | APInt ShlConst = (cast<ConstantSDNode>(N01))->getAPIntValue(); | |||
44396 | APInt SarConst = (cast<ConstantSDNode>(N1))->getAPIntValue(); | |||
44397 | EVT CVT = N1.getValueType(); | |||
44398 | ||||
44399 | if (SarConst.isNegative()) | |||
44400 | return SDValue(); | |||
44401 | ||||
44402 | for (MVT SVT : { MVT::i8, MVT::i16, MVT::i32 }) { | |||
44403 | unsigned ShiftSize = SVT.getSizeInBits(); | |||
44404 | // skipping types without corresponding sext/zext and | |||
44405 | // ShlConst that is not one of [56,48,32,24,16] | |||
44406 | if (ShiftSize >= Size || ShlConst != Size - ShiftSize) | |||
44407 | continue; | |||
44408 | SDLoc DL(N); | |||
44409 | SDValue NN = | |||
44410 | DAG.getNode(ISD::SIGN_EXTEND_INREG, DL, VT, N00, DAG.getValueType(SVT)); | |||
44411 | SarConst = SarConst - (Size - ShiftSize); | |||
44412 | if (SarConst == 0) | |||
44413 | return NN; | |||
44414 | else if (SarConst.isNegative()) | |||
44415 | return DAG.getNode(ISD::SHL, DL, VT, NN, | |||
44416 | DAG.getConstant(-SarConst, DL, CVT)); | |||
44417 | else | |||
44418 | return DAG.getNode(ISD::SRA, DL, VT, NN, | |||
44419 | DAG.getConstant(SarConst, DL, CVT)); | |||
44420 | } | |||
44421 | return SDValue(); | |||
44422 | } | |||
44423 | ||||
44424 | static SDValue combineShiftRightLogical(SDNode *N, SelectionDAG &DAG, | |||
44425 | TargetLowering::DAGCombinerInfo &DCI, | |||
44426 | const X86Subtarget &Subtarget) { | |||
44427 | SDValue N0 = N->getOperand(0); | |||
44428 | SDValue N1 = N->getOperand(1); | |||
44429 | EVT VT = N0.getValueType(); | |||
44430 | ||||
44431 | if (SDValue V = combineShiftToPMULH(N, DAG, Subtarget)) | |||
44432 | return V; | |||
44433 | ||||
44434 | // Only do this on the last DAG combine as it can interfere with other | |||
44435 | // combines. | |||
44436 | if (!DCI.isAfterLegalizeDAG()) | |||
44437 | return SDValue(); | |||
44438 | ||||
44439 | // Try to improve a sequence of srl (and X, C1), C2 by inverting the order. | |||
44440 | // TODO: This is a generic DAG combine that became an x86-only combine to | |||
44441 | // avoid shortcomings in other folds such as bswap, bit-test ('bt'), and | |||
44442 | // and-not ('andn'). | |||
44443 | if (N0.getOpcode() != ISD::AND || !N0.hasOneUse()) | |||
44444 | return SDValue(); | |||
44445 | ||||
44446 | auto *ShiftC = dyn_cast<ConstantSDNode>(N1); | |||
44447 | auto *AndC = dyn_cast<ConstantSDNode>(N0.getOperand(1)); | |||
44448 | if (!ShiftC || !AndC) | |||
44449 | return SDValue(); | |||
44450 | ||||
44451 | // If we can shrink the constant mask below 8-bits or 32-bits, then this | |||
44452 | // transform should reduce code size. It may also enable secondary transforms | |||
44453 | // from improved known-bits analysis or instruction selection. | |||
44454 | APInt MaskVal = AndC->getAPIntValue(); | |||
44455 | ||||
44456 | // If this can be matched by a zero extend, don't optimize. | |||
44457 | if (MaskVal.isMask()) { | |||
44458 | unsigned TO = MaskVal.countTrailingOnes(); | |||
44459 | if (TO >= 8 && isPowerOf2_32(TO)) | |||
44460 | return SDValue(); | |||
44461 | } | |||
44462 | ||||
44463 | APInt NewMaskVal = MaskVal.lshr(ShiftC->getAPIntValue()); | |||
44464 | unsigned OldMaskSize = MaskVal.getMinSignedBits(); | |||
44465 | unsigned NewMaskSize = NewMaskVal.getMinSignedBits(); | |||
44466 | if ((OldMaskSize > 8 && NewMaskSize <= 8) || | |||
44467 | (OldMaskSize > 32 && NewMaskSize <= 32)) { | |||
44468 | // srl (and X, AndC), ShiftC --> and (srl X, ShiftC), (AndC >> ShiftC) | |||
44469 | SDLoc DL(N); | |||
44470 | SDValue NewMask = DAG.getConstant(NewMaskVal, DL, VT); | |||
44471 | SDValue NewShift = DAG.getNode(ISD::SRL, DL, VT, N0.getOperand(0), N1); | |||
44472 | return DAG.getNode(ISD::AND, DL, VT, NewShift, NewMask); | |||
44473 | } | |||
44474 | return SDValue(); | |||
44475 | } | |||
44476 | ||||
44477 | static SDValue combineHorizOpWithShuffle(SDNode *N, SelectionDAG &DAG, | |||
44478 | const X86Subtarget &Subtarget) { | |||
44479 | unsigned Opcode = N->getOpcode(); | |||
44480 | assert(isHorizOp(Opcode) && "Unexpected hadd/hsub/pack opcode")(static_cast <bool> (isHorizOp(Opcode) && "Unexpected hadd/hsub/pack opcode" ) ? void (0) : __assert_fail ("isHorizOp(Opcode) && \"Unexpected hadd/hsub/pack opcode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 44480, __extension__ __PRETTY_FUNCTION__)); | |||
44481 | ||||
44482 | SDLoc DL(N); | |||
44483 | EVT VT = N->getValueType(0); | |||
44484 | SDValue N0 = N->getOperand(0); | |||
44485 | SDValue N1 = N->getOperand(1); | |||
44486 | EVT SrcVT = N0.getValueType(); | |||
44487 | ||||
44488 | SDValue BC0 = | |||
44489 | N->isOnlyUserOf(N0.getNode()) ? peekThroughOneUseBitcasts(N0) : N0; | |||
44490 | SDValue BC1 = | |||
44491 | N->isOnlyUserOf(N1.getNode()) ? peekThroughOneUseBitcasts(N1) : N1; | |||
44492 | ||||
44493 | // Attempt to fold HOP(LOSUBVECTOR(SHUFFLE(X)),HISUBVECTOR(SHUFFLE(X))) | |||
44494 | // to SHUFFLE(HOP(LOSUBVECTOR(X),HISUBVECTOR(X))), this is mainly for | |||
44495 | // truncation trees that help us avoid lane crossing shuffles. | |||
44496 | // TODO: There's a lot more we can do for PACK/HADD style shuffle combines. | |||
44497 | // TODO: We don't handle vXf64 shuffles yet. | |||
44498 | if (VT.is128BitVector() && SrcVT.getScalarSizeInBits() <= 32 && | |||
44499 | BC0.getOpcode() == ISD::EXTRACT_SUBVECTOR && | |||
44500 | BC1.getOpcode() == ISD::EXTRACT_SUBVECTOR && | |||
44501 | BC0.getOperand(0) == BC1.getOperand(0) && | |||
44502 | BC0.getOperand(0).getValueType().is256BitVector() && | |||
44503 | BC0.getConstantOperandAPInt(1) == 0 && | |||
44504 | BC1.getConstantOperandAPInt(1) == | |||
44505 | BC0.getValueType().getVectorNumElements()) { | |||
44506 | SmallVector<SDValue> ShuffleOps; | |||
44507 | SmallVector<int> ShuffleMask, ScaledMask; | |||
44508 | SDValue Vec = peekThroughBitcasts(BC0.getOperand(0)); | |||
44509 | if (getTargetShuffleInputs(Vec, ShuffleOps, ShuffleMask, DAG)) { | |||
44510 | resolveTargetShuffleInputsAndMask(ShuffleOps, ShuffleMask); | |||
44511 | // To keep the HOP LHS/RHS coherency, we must be able to scale the unary | |||
44512 | // shuffle to a v4X64 width - we can probably relax this in the future. | |||
44513 | if (!isAnyZero(ShuffleMask) && ShuffleOps.size() == 1 && | |||
44514 | ShuffleOps[0].getValueType().is256BitVector() && | |||
44515 | scaleShuffleElements(ShuffleMask, 4, ScaledMask)) { | |||
44516 | SDValue Lo, Hi; | |||
44517 | MVT ShufVT = VT.isFloatingPoint() ? MVT::v4f32 : MVT::v4i32; | |||
44518 | std::tie(Lo, Hi) = DAG.SplitVector(ShuffleOps[0], DL); | |||
44519 | Lo = DAG.getBitcast(SrcVT, Lo); | |||
44520 | Hi = DAG.getBitcast(SrcVT, Hi); | |||
44521 | SDValue Res = DAG.getNode(Opcode, DL, VT, Lo, Hi); | |||
44522 | Res = DAG.getBitcast(ShufVT, Res); | |||
44523 | Res = DAG.getVectorShuffle(ShufVT, DL, Res, Res, ScaledMask); | |||
44524 | return DAG.getBitcast(VT, Res); | |||
44525 | } | |||
44526 | } | |||
44527 | } | |||
44528 | ||||
44529 | // Attempt to fold HOP(SHUFFLE(X,Y),SHUFFLE(Z,W)) -> SHUFFLE(HOP()). | |||
44530 | if (VT.is128BitVector() && SrcVT.getScalarSizeInBits() <= 32) { | |||
44531 | // If either/both ops are a shuffle that can scale to v2x64, | |||
44532 | // then see if we can perform this as a v4x32 post shuffle. | |||
44533 | SmallVector<SDValue> Ops0, Ops1; | |||
44534 | SmallVector<int> Mask0, Mask1, ScaledMask0, ScaledMask1; | |||
44535 | bool IsShuf0 = | |||
44536 | getTargetShuffleInputs(BC0, Ops0, Mask0, DAG) && !isAnyZero(Mask0) && | |||
44537 | scaleShuffleElements(Mask0, 2, ScaledMask0) && | |||
44538 | all_of(Ops0, [](SDValue Op) { return Op.getValueSizeInBits() == 128; }); | |||
44539 | bool IsShuf1 = | |||
44540 | getTargetShuffleInputs(BC1, Ops1, Mask1, DAG) && !isAnyZero(Mask1) && | |||
44541 | scaleShuffleElements(Mask1, 2, ScaledMask1) && | |||
44542 | all_of(Ops1, [](SDValue Op) { return Op.getValueSizeInBits() == 128; }); | |||
44543 | if (IsShuf0 || IsShuf1) { | |||
44544 | if (!IsShuf0) { | |||
44545 | Ops0.assign({BC0}); | |||
44546 | ScaledMask0.assign({0, 1}); | |||
44547 | } | |||
44548 | if (!IsShuf1) { | |||
44549 | Ops1.assign({BC1}); | |||
44550 | ScaledMask1.assign({0, 1}); | |||
44551 | } | |||
44552 | ||||
44553 | SDValue LHS, RHS; | |||
44554 | int PostShuffle[4] = {-1, -1, -1, -1}; | |||
44555 | auto FindShuffleOpAndIdx = [&](int M, int &Idx, ArrayRef<SDValue> Ops) { | |||
44556 | if (M < 0) | |||
44557 | return true; | |||
44558 | Idx = M % 2; | |||
44559 | SDValue Src = Ops[M / 2]; | |||
44560 | if (!LHS || LHS == Src) { | |||
44561 | LHS = Src; | |||
44562 | return true; | |||
44563 | } | |||
44564 | if (!RHS || RHS == Src) { | |||
44565 | Idx += 2; | |||
44566 | RHS = Src; | |||
44567 | return true; | |||
44568 | } | |||
44569 | return false; | |||
44570 | }; | |||
44571 | if (FindShuffleOpAndIdx(ScaledMask0[0], PostShuffle[0], Ops0) && | |||
44572 | FindShuffleOpAndIdx(ScaledMask0[1], PostShuffle[1], Ops0) && | |||
44573 | FindShuffleOpAndIdx(ScaledMask1[0], PostShuffle[2], Ops1) && | |||
44574 | FindShuffleOpAndIdx(ScaledMask1[1], PostShuffle[3], Ops1)) { | |||
44575 | LHS = DAG.getBitcast(SrcVT, LHS); | |||
44576 | RHS = DAG.getBitcast(SrcVT, RHS ? RHS : LHS); | |||
44577 | MVT ShufVT = VT.isFloatingPoint() ? MVT::v4f32 : MVT::v4i32; | |||
44578 | SDValue Res = DAG.getNode(Opcode, DL, VT, LHS, RHS); | |||
44579 | Res = DAG.getBitcast(ShufVT, Res); | |||
44580 | Res = DAG.getVectorShuffle(ShufVT, DL, Res, Res, PostShuffle); | |||
44581 | return DAG.getBitcast(VT, Res); | |||
44582 | } | |||
44583 | } | |||
44584 | } | |||
44585 | ||||
44586 | // Attempt to fold HOP(SHUFFLE(X,Y),SHUFFLE(X,Y)) -> SHUFFLE(HOP(X,Y)). | |||
44587 | if (VT.is256BitVector() && Subtarget.hasInt256()) { | |||
44588 | SmallVector<int> Mask0, Mask1; | |||
44589 | SmallVector<SDValue> Ops0, Ops1; | |||
44590 | SmallVector<int, 2> ScaledMask0, ScaledMask1; | |||
44591 | if (getTargetShuffleInputs(BC0, Ops0, Mask0, DAG) && !isAnyZero(Mask0) && | |||
44592 | getTargetShuffleInputs(BC1, Ops1, Mask1, DAG) && !isAnyZero(Mask1) && | |||
44593 | !Ops0.empty() && !Ops1.empty() && | |||
44594 | all_of(Ops0, | |||
44595 | [](SDValue Op) { return Op.getValueType().is256BitVector(); }) && | |||
44596 | all_of(Ops1, | |||
44597 | [](SDValue Op) { return Op.getValueType().is256BitVector(); }) && | |||
44598 | scaleShuffleElements(Mask0, 2, ScaledMask0) && | |||
44599 | scaleShuffleElements(Mask1, 2, ScaledMask1)) { | |||
44600 | SDValue Op00 = peekThroughBitcasts(Ops0.front()); | |||
44601 | SDValue Op10 = peekThroughBitcasts(Ops1.front()); | |||
44602 | SDValue Op01 = peekThroughBitcasts(Ops0.back()); | |||
44603 | SDValue Op11 = peekThroughBitcasts(Ops1.back()); | |||
44604 | if ((Op00 == Op11) && (Op01 == Op10)) { | |||
44605 | std::swap(Op10, Op11); | |||
44606 | ShuffleVectorSDNode::commuteMask(ScaledMask1); | |||
44607 | } | |||
44608 | if ((Op00 == Op10) && (Op01 == Op11)) { | |||
44609 | const int Map[4] = {0, 2, 1, 3}; | |||
44610 | SmallVector<int, 4> ShuffleMask( | |||
44611 | {Map[ScaledMask0[0]], Map[ScaledMask1[0]], Map[ScaledMask0[1]], | |||
44612 | Map[ScaledMask1[1]]}); | |||
44613 | MVT ShufVT = VT.isFloatingPoint() ? MVT::v4f64 : MVT::v4i64; | |||
44614 | SDValue Res = DAG.getNode(Opcode, DL, VT, DAG.getBitcast(SrcVT, Op00), | |||
44615 | DAG.getBitcast(SrcVT, Op01)); | |||
44616 | Res = DAG.getBitcast(ShufVT, Res); | |||
44617 | Res = DAG.getVectorShuffle(ShufVT, DL, Res, Res, ShuffleMask); | |||
44618 | return DAG.getBitcast(VT, Res); | |||
44619 | } | |||
44620 | } | |||
44621 | } | |||
44622 | ||||
44623 | return SDValue(); | |||
44624 | } | |||
44625 | ||||
44626 | static SDValue combineVectorPack(SDNode *N, SelectionDAG &DAG, | |||
44627 | TargetLowering::DAGCombinerInfo &DCI, | |||
44628 | const X86Subtarget &Subtarget) { | |||
44629 | unsigned Opcode = N->getOpcode(); | |||
44630 | assert((X86ISD::PACKSS == Opcode || X86ISD::PACKUS == Opcode) &&(static_cast <bool> ((X86ISD::PACKSS == Opcode || X86ISD ::PACKUS == Opcode) && "Unexpected pack opcode") ? void (0) : __assert_fail ("(X86ISD::PACKSS == Opcode || X86ISD::PACKUS == Opcode) && \"Unexpected pack opcode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 44631, __extension__ __PRETTY_FUNCTION__)) | |||
44631 | "Unexpected pack opcode")(static_cast <bool> ((X86ISD::PACKSS == Opcode || X86ISD ::PACKUS == Opcode) && "Unexpected pack opcode") ? void (0) : __assert_fail ("(X86ISD::PACKSS == Opcode || X86ISD::PACKUS == Opcode) && \"Unexpected pack opcode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 44631, __extension__ __PRETTY_FUNCTION__)); | |||
44632 | ||||
44633 | EVT VT = N->getValueType(0); | |||
44634 | SDValue N0 = N->getOperand(0); | |||
44635 | SDValue N1 = N->getOperand(1); | |||
44636 | unsigned NumDstElts = VT.getVectorNumElements(); | |||
44637 | unsigned DstBitsPerElt = VT.getScalarSizeInBits(); | |||
44638 | unsigned SrcBitsPerElt = 2 * DstBitsPerElt; | |||
44639 | assert(N0.getScalarValueSizeInBits() == SrcBitsPerElt &&(static_cast <bool> (N0.getScalarValueSizeInBits() == SrcBitsPerElt && N1.getScalarValueSizeInBits() == SrcBitsPerElt && "Unexpected PACKSS/PACKUS input type") ? void (0) : __assert_fail ("N0.getScalarValueSizeInBits() == SrcBitsPerElt && N1.getScalarValueSizeInBits() == SrcBitsPerElt && \"Unexpected PACKSS/PACKUS input type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 44641, __extension__ __PRETTY_FUNCTION__)) | |||
44640 | N1.getScalarValueSizeInBits() == SrcBitsPerElt &&(static_cast <bool> (N0.getScalarValueSizeInBits() == SrcBitsPerElt && N1.getScalarValueSizeInBits() == SrcBitsPerElt && "Unexpected PACKSS/PACKUS input type") ? void (0) : __assert_fail ("N0.getScalarValueSizeInBits() == SrcBitsPerElt && N1.getScalarValueSizeInBits() == SrcBitsPerElt && \"Unexpected PACKSS/PACKUS input type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 44641, __extension__ __PRETTY_FUNCTION__)) | |||
44641 | "Unexpected PACKSS/PACKUS input type")(static_cast <bool> (N0.getScalarValueSizeInBits() == SrcBitsPerElt && N1.getScalarValueSizeInBits() == SrcBitsPerElt && "Unexpected PACKSS/PACKUS input type") ? void (0) : __assert_fail ("N0.getScalarValueSizeInBits() == SrcBitsPerElt && N1.getScalarValueSizeInBits() == SrcBitsPerElt && \"Unexpected PACKSS/PACKUS input type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 44641, __extension__ __PRETTY_FUNCTION__)); | |||
44642 | ||||
44643 | bool IsSigned = (X86ISD::PACKSS == Opcode); | |||
44644 | ||||
44645 | // Constant Folding. | |||
44646 | APInt UndefElts0, UndefElts1; | |||
44647 | SmallVector<APInt, 32> EltBits0, EltBits1; | |||
44648 | if ((N0.isUndef() || N->isOnlyUserOf(N0.getNode())) && | |||
44649 | (N1.isUndef() || N->isOnlyUserOf(N1.getNode())) && | |||
44650 | getTargetConstantBitsFromNode(N0, SrcBitsPerElt, UndefElts0, EltBits0) && | |||
44651 | getTargetConstantBitsFromNode(N1, SrcBitsPerElt, UndefElts1, EltBits1)) { | |||
44652 | unsigned NumLanes = VT.getSizeInBits() / 128; | |||
44653 | unsigned NumSrcElts = NumDstElts / 2; | |||
44654 | unsigned NumDstEltsPerLane = NumDstElts / NumLanes; | |||
44655 | unsigned NumSrcEltsPerLane = NumSrcElts / NumLanes; | |||
44656 | ||||
44657 | APInt Undefs(NumDstElts, 0); | |||
44658 | SmallVector<APInt, 32> Bits(NumDstElts, APInt::getNullValue(DstBitsPerElt)); | |||
44659 | for (unsigned Lane = 0; Lane != NumLanes; ++Lane) { | |||
44660 | for (unsigned Elt = 0; Elt != NumDstEltsPerLane; ++Elt) { | |||
44661 | unsigned SrcIdx = Lane * NumSrcEltsPerLane + Elt % NumSrcEltsPerLane; | |||
44662 | auto &UndefElts = (Elt >= NumSrcEltsPerLane ? UndefElts1 : UndefElts0); | |||
44663 | auto &EltBits = (Elt >= NumSrcEltsPerLane ? EltBits1 : EltBits0); | |||
44664 | ||||
44665 | if (UndefElts[SrcIdx]) { | |||
44666 | Undefs.setBit(Lane * NumDstEltsPerLane + Elt); | |||
44667 | continue; | |||
44668 | } | |||
44669 | ||||
44670 | APInt &Val = EltBits[SrcIdx]; | |||
44671 | if (IsSigned) { | |||
44672 | // PACKSS: Truncate signed value with signed saturation. | |||
44673 | // Source values less than dst minint are saturated to minint. | |||
44674 | // Source values greater than dst maxint are saturated to maxint. | |||
44675 | if (Val.isSignedIntN(DstBitsPerElt)) | |||
44676 | Val = Val.trunc(DstBitsPerElt); | |||
44677 | else if (Val.isNegative()) | |||
44678 | Val = APInt::getSignedMinValue(DstBitsPerElt); | |||
44679 | else | |||
44680 | Val = APInt::getSignedMaxValue(DstBitsPerElt); | |||
44681 | } else { | |||
44682 | // PACKUS: Truncate signed value with unsigned saturation. | |||
44683 | // Source values less than zero are saturated to zero. | |||
44684 | // Source values greater than dst maxuint are saturated to maxuint. | |||
44685 | if (Val.isIntN(DstBitsPerElt)) | |||
44686 | Val = Val.trunc(DstBitsPerElt); | |||
44687 | else if (Val.isNegative()) | |||
44688 | Val = APInt::getNullValue(DstBitsPerElt); | |||
44689 | else | |||
44690 | Val = APInt::getAllOnesValue(DstBitsPerElt); | |||
44691 | } | |||
44692 | Bits[Lane * NumDstEltsPerLane + Elt] = Val; | |||
44693 | } | |||
44694 | } | |||
44695 | ||||
44696 | return getConstVector(Bits, Undefs, VT.getSimpleVT(), DAG, SDLoc(N)); | |||
44697 | } | |||
44698 | ||||
44699 | // Try to fold PACK(SHUFFLE(),SHUFFLE()) -> SHUFFLE(PACK()). | |||
44700 | if (SDValue V = combineHorizOpWithShuffle(N, DAG, Subtarget)) | |||
44701 | return V; | |||
44702 | ||||
44703 | // Try to combine a PACKUSWB/PACKSSWB implemented truncate with a regular | |||
44704 | // truncate to create a larger truncate. | |||
44705 | if (Subtarget.hasAVX512() && | |||
44706 | N0.getOpcode() == ISD::TRUNCATE && N1.isUndef() && VT == MVT::v16i8 && | |||
44707 | N0.getOperand(0).getValueType() == MVT::v8i32) { | |||
44708 | if ((IsSigned && DAG.ComputeNumSignBits(N0) > 8) || | |||
44709 | (!IsSigned && | |||
44710 | DAG.MaskedValueIsZero(N0, APInt::getHighBitsSet(16, 8)))) { | |||
44711 | if (Subtarget.hasVLX()) | |||
44712 | return DAG.getNode(X86ISD::VTRUNC, SDLoc(N), VT, N0.getOperand(0)); | |||
44713 | ||||
44714 | // Widen input to v16i32 so we can truncate that. | |||
44715 | SDLoc dl(N); | |||
44716 | SDValue Concat = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v16i32, | |||
44717 | N0.getOperand(0), DAG.getUNDEF(MVT::v8i32)); | |||
44718 | return DAG.getNode(ISD::TRUNCATE, SDLoc(N), VT, Concat); | |||
44719 | } | |||
44720 | } | |||
44721 | ||||
44722 | // Try to fold PACK(EXTEND(X),EXTEND(Y)) -> CONCAT(X,Y) subvectors. | |||
44723 | if (VT.is128BitVector()) { | |||
44724 | unsigned ExtOpc = IsSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND; | |||
44725 | SDValue Src0, Src1; | |||
44726 | if (N0.getOpcode() == ExtOpc && | |||
44727 | N0.getOperand(0).getValueType().is64BitVector() && | |||
44728 | N0.getOperand(0).getScalarValueSizeInBits() == DstBitsPerElt) { | |||
44729 | Src0 = N0.getOperand(0); | |||
44730 | } | |||
44731 | if (N1.getOpcode() == ExtOpc && | |||
44732 | N1.getOperand(0).getValueType().is64BitVector() && | |||
44733 | N1.getOperand(0).getScalarValueSizeInBits() == DstBitsPerElt) { | |||
44734 | Src1 = N1.getOperand(0); | |||
44735 | } | |||
44736 | if ((Src0 || N0.isUndef()) && (Src1 || N1.isUndef())) { | |||
44737 | assert((Src0 || Src1) && "Found PACK(UNDEF,UNDEF)")(static_cast <bool> ((Src0 || Src1) && "Found PACK(UNDEF,UNDEF)" ) ? void (0) : __assert_fail ("(Src0 || Src1) && \"Found PACK(UNDEF,UNDEF)\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 44737, __extension__ __PRETTY_FUNCTION__)); | |||
44738 | Src0 = Src0 ? Src0 : DAG.getUNDEF(Src1.getValueType()); | |||
44739 | Src1 = Src1 ? Src1 : DAG.getUNDEF(Src0.getValueType()); | |||
44740 | return DAG.getNode(ISD::CONCAT_VECTORS, SDLoc(N), VT, Src0, Src1); | |||
44741 | } | |||
44742 | } | |||
44743 | ||||
44744 | // Attempt to combine as shuffle. | |||
44745 | SDValue Op(N, 0); | |||
44746 | if (SDValue Res = combineX86ShufflesRecursively(Op, DAG, Subtarget)) | |||
44747 | return Res; | |||
44748 | ||||
44749 | return SDValue(); | |||
44750 | } | |||
44751 | ||||
44752 | static SDValue combineVectorHADDSUB(SDNode *N, SelectionDAG &DAG, | |||
44753 | TargetLowering::DAGCombinerInfo &DCI, | |||
44754 | const X86Subtarget &Subtarget) { | |||
44755 | assert((X86ISD::HADD == N->getOpcode() || X86ISD::FHADD == N->getOpcode() ||(static_cast <bool> ((X86ISD::HADD == N->getOpcode() || X86ISD::FHADD == N->getOpcode() || X86ISD::HSUB == N-> getOpcode() || X86ISD::FHSUB == N->getOpcode()) && "Unexpected horizontal add/sub opcode") ? void (0) : __assert_fail ("(X86ISD::HADD == N->getOpcode() || X86ISD::FHADD == N->getOpcode() || X86ISD::HSUB == N->getOpcode() || X86ISD::FHSUB == N->getOpcode()) && \"Unexpected horizontal add/sub opcode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 44757, __extension__ __PRETTY_FUNCTION__)) | |||
44756 | X86ISD::HSUB == N->getOpcode() || X86ISD::FHSUB == N->getOpcode()) &&(static_cast <bool> ((X86ISD::HADD == N->getOpcode() || X86ISD::FHADD == N->getOpcode() || X86ISD::HSUB == N-> getOpcode() || X86ISD::FHSUB == N->getOpcode()) && "Unexpected horizontal add/sub opcode") ? void (0) : __assert_fail ("(X86ISD::HADD == N->getOpcode() || X86ISD::FHADD == N->getOpcode() || X86ISD::HSUB == N->getOpcode() || X86ISD::FHSUB == N->getOpcode()) && \"Unexpected horizontal add/sub opcode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 44757, __extension__ __PRETTY_FUNCTION__)) | |||
44757 | "Unexpected horizontal add/sub opcode")(static_cast <bool> ((X86ISD::HADD == N->getOpcode() || X86ISD::FHADD == N->getOpcode() || X86ISD::HSUB == N-> getOpcode() || X86ISD::FHSUB == N->getOpcode()) && "Unexpected horizontal add/sub opcode") ? void (0) : __assert_fail ("(X86ISD::HADD == N->getOpcode() || X86ISD::FHADD == N->getOpcode() || X86ISD::HSUB == N->getOpcode() || X86ISD::FHSUB == N->getOpcode()) && \"Unexpected horizontal add/sub opcode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 44757, __extension__ __PRETTY_FUNCTION__)); | |||
44758 | ||||
44759 | if (!shouldUseHorizontalOp(true, DAG, Subtarget)) { | |||
44760 | // For slow-hop targets, if we have a hop with a single op, see if we already | |||
44761 | // have another user that we can reuse and shuffle the result. | |||
44762 | MVT VT = N->getSimpleValueType(0); | |||
44763 | SDValue LHS = N->getOperand(0); | |||
44764 | SDValue RHS = N->getOperand(1); | |||
44765 | if (VT.is128BitVector() && LHS == RHS) { | |||
44766 | for (SDNode *User : LHS->uses()) { | |||
44767 | if (User != N && User->getOpcode() == N->getOpcode()) { | |||
44768 | MVT ShufVT = VT.isFloatingPoint() ? MVT::v4f32 : MVT::v4i32; | |||
44769 | if (User->getOperand(0) == LHS && !User->getOperand(1).isUndef()) { | |||
44770 | return DAG.getBitcast( | |||
44771 | VT, | |||
44772 | DAG.getVectorShuffle(ShufVT, SDLoc(N), | |||
44773 | DAG.getBitcast(ShufVT, SDValue(User, 0)), | |||
44774 | DAG.getUNDEF(ShufVT), {0, 1, 0, 1})); | |||
44775 | } | |||
44776 | if (User->getOperand(1) == LHS && !User->getOperand(0).isUndef()) { | |||
44777 | return DAG.getBitcast( | |||
44778 | VT, | |||
44779 | DAG.getVectorShuffle(ShufVT, SDLoc(N), | |||
44780 | DAG.getBitcast(ShufVT, SDValue(User, 0)), | |||
44781 | DAG.getUNDEF(ShufVT), {2, 3, 2, 3})); | |||
44782 | } | |||
44783 | } | |||
44784 | } | |||
44785 | } | |||
44786 | ||||
44787 | // HOP(HOP'(X,X),HOP'(Y,Y)) -> HOP(PERMUTE(HOP'(X,Y)),PERMUTE(HOP'(X,Y)). | |||
44788 | if (LHS != RHS && LHS.getOpcode() == N->getOpcode() && | |||
44789 | LHS.getOpcode() == RHS.getOpcode() && | |||
44790 | LHS.getValueType() == RHS.getValueType()) { | |||
44791 | SDValue LHS0 = LHS.getOperand(0); | |||
44792 | SDValue RHS0 = LHS.getOperand(1); | |||
44793 | SDValue LHS1 = RHS.getOperand(0); | |||
44794 | SDValue RHS1 = RHS.getOperand(1); | |||
44795 | if ((LHS0 == RHS0 || LHS0.isUndef() || RHS0.isUndef()) && | |||
44796 | (LHS1 == RHS1 || LHS1.isUndef() || RHS1.isUndef())) { | |||
44797 | SDLoc DL(N); | |||
44798 | SDValue Res = DAG.getNode(LHS.getOpcode(), DL, LHS.getValueType(), | |||
44799 | LHS0.isUndef() ? RHS0 : LHS0, | |||
44800 | LHS1.isUndef() ? RHS1 : LHS1); | |||
44801 | MVT ShufVT = MVT::getVectorVT(MVT::i32, VT.getSizeInBits() / 32); | |||
44802 | Res = DAG.getBitcast(ShufVT, Res); | |||
44803 | SDValue NewLHS = | |||
44804 | DAG.getNode(X86ISD::PSHUFD, DL, ShufVT, Res, | |||
44805 | getV4X86ShuffleImm8ForMask({0, 1, 0, 1}, DL, DAG)); | |||
44806 | SDValue NewRHS = | |||
44807 | DAG.getNode(X86ISD::PSHUFD, DL, ShufVT, Res, | |||
44808 | getV4X86ShuffleImm8ForMask({2, 3, 2, 3}, DL, DAG)); | |||
44809 | DAG.ReplaceAllUsesOfValueWith(LHS, DAG.getBitcast(VT, NewLHS)); | |||
44810 | DAG.ReplaceAllUsesOfValueWith(RHS, DAG.getBitcast(VT, NewRHS)); | |||
44811 | return SDValue(N, 0); | |||
44812 | } | |||
44813 | } | |||
44814 | } | |||
44815 | ||||
44816 | // Try to fold HOP(SHUFFLE(),SHUFFLE()) -> SHUFFLE(HOP()). | |||
44817 | if (SDValue V = combineHorizOpWithShuffle(N, DAG, Subtarget)) | |||
44818 | return V; | |||
44819 | ||||
44820 | return SDValue(); | |||
44821 | } | |||
44822 | ||||
44823 | static SDValue combineVectorShiftVar(SDNode *N, SelectionDAG &DAG, | |||
44824 | TargetLowering::DAGCombinerInfo &DCI, | |||
44825 | const X86Subtarget &Subtarget) { | |||
44826 | assert((X86ISD::VSHL == N->getOpcode() || X86ISD::VSRA == N->getOpcode() ||(static_cast <bool> ((X86ISD::VSHL == N->getOpcode() || X86ISD::VSRA == N->getOpcode() || X86ISD::VSRL == N-> getOpcode()) && "Unexpected shift opcode") ? void (0) : __assert_fail ("(X86ISD::VSHL == N->getOpcode() || X86ISD::VSRA == N->getOpcode() || X86ISD::VSRL == N->getOpcode()) && \"Unexpected shift opcode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 44828, __extension__ __PRETTY_FUNCTION__)) | |||
44827 | X86ISD::VSRL == N->getOpcode()) &&(static_cast <bool> ((X86ISD::VSHL == N->getOpcode() || X86ISD::VSRA == N->getOpcode() || X86ISD::VSRL == N-> getOpcode()) && "Unexpected shift opcode") ? void (0) : __assert_fail ("(X86ISD::VSHL == N->getOpcode() || X86ISD::VSRA == N->getOpcode() || X86ISD::VSRL == N->getOpcode()) && \"Unexpected shift opcode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 44828, __extension__ __PRETTY_FUNCTION__)) | |||
44828 | "Unexpected shift opcode")(static_cast <bool> ((X86ISD::VSHL == N->getOpcode() || X86ISD::VSRA == N->getOpcode() || X86ISD::VSRL == N-> getOpcode()) && "Unexpected shift opcode") ? void (0) : __assert_fail ("(X86ISD::VSHL == N->getOpcode() || X86ISD::VSRA == N->getOpcode() || X86ISD::VSRL == N->getOpcode()) && \"Unexpected shift opcode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 44828, __extension__ __PRETTY_FUNCTION__)); | |||
44829 | EVT VT = N->getValueType(0); | |||
44830 | SDValue N0 = N->getOperand(0); | |||
44831 | SDValue N1 = N->getOperand(1); | |||
44832 | ||||
44833 | // Shift zero -> zero. | |||
44834 | if (ISD::isBuildVectorAllZeros(N0.getNode())) | |||
44835 | return DAG.getConstant(0, SDLoc(N), VT); | |||
44836 | ||||
44837 | // Detect constant shift amounts. | |||
44838 | APInt UndefElts; | |||
44839 | SmallVector<APInt, 32> EltBits; | |||
44840 | if (getTargetConstantBitsFromNode(N1, 64, UndefElts, EltBits, true, false)) { | |||
44841 | unsigned X86Opc = getTargetVShiftUniformOpcode(N->getOpcode(), false); | |||
44842 | return getTargetVShiftByConstNode(X86Opc, SDLoc(N), VT.getSimpleVT(), N0, | |||
44843 | EltBits[0].getZExtValue(), DAG); | |||
44844 | } | |||
44845 | ||||
44846 | APInt KnownUndef, KnownZero; | |||
44847 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
44848 | APInt DemandedElts = APInt::getAllOnesValue(VT.getVectorNumElements()); | |||
44849 | if (TLI.SimplifyDemandedVectorElts(SDValue(N, 0), DemandedElts, KnownUndef, | |||
44850 | KnownZero, DCI)) | |||
44851 | return SDValue(N, 0); | |||
44852 | ||||
44853 | return SDValue(); | |||
44854 | } | |||
44855 | ||||
44856 | static SDValue combineVectorShiftImm(SDNode *N, SelectionDAG &DAG, | |||
44857 | TargetLowering::DAGCombinerInfo &DCI, | |||
44858 | const X86Subtarget &Subtarget) { | |||
44859 | unsigned Opcode = N->getOpcode(); | |||
44860 | assert((X86ISD::VSHLI == Opcode || X86ISD::VSRAI == Opcode ||(static_cast <bool> ((X86ISD::VSHLI == Opcode || X86ISD ::VSRAI == Opcode || X86ISD::VSRLI == Opcode) && "Unexpected shift opcode" ) ? void (0) : __assert_fail ("(X86ISD::VSHLI == Opcode || X86ISD::VSRAI == Opcode || X86ISD::VSRLI == Opcode) && \"Unexpected shift opcode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 44862, __extension__ __PRETTY_FUNCTION__)) | |||
44861 | X86ISD::VSRLI == Opcode) &&(static_cast <bool> ((X86ISD::VSHLI == Opcode || X86ISD ::VSRAI == Opcode || X86ISD::VSRLI == Opcode) && "Unexpected shift opcode" ) ? void (0) : __assert_fail ("(X86ISD::VSHLI == Opcode || X86ISD::VSRAI == Opcode || X86ISD::VSRLI == Opcode) && \"Unexpected shift opcode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 44862, __extension__ __PRETTY_FUNCTION__)) | |||
44862 | "Unexpected shift opcode")(static_cast <bool> ((X86ISD::VSHLI == Opcode || X86ISD ::VSRAI == Opcode || X86ISD::VSRLI == Opcode) && "Unexpected shift opcode" ) ? void (0) : __assert_fail ("(X86ISD::VSHLI == Opcode || X86ISD::VSRAI == Opcode || X86ISD::VSRLI == Opcode) && \"Unexpected shift opcode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 44862, __extension__ __PRETTY_FUNCTION__)); | |||
44863 | bool LogicalShift = X86ISD::VSHLI == Opcode || X86ISD::VSRLI == Opcode; | |||
44864 | EVT VT = N->getValueType(0); | |||
44865 | SDValue N0 = N->getOperand(0); | |||
44866 | unsigned NumBitsPerElt = VT.getScalarSizeInBits(); | |||
44867 | assert(VT == N0.getValueType() && (NumBitsPerElt % 8) == 0 &&(static_cast <bool> (VT == N0.getValueType() && (NumBitsPerElt % 8) == 0 && "Unexpected value type") ? void (0) : __assert_fail ("VT == N0.getValueType() && (NumBitsPerElt % 8) == 0 && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 44868, __extension__ __PRETTY_FUNCTION__)) | |||
44868 | "Unexpected value type")(static_cast <bool> (VT == N0.getValueType() && (NumBitsPerElt % 8) == 0 && "Unexpected value type") ? void (0) : __assert_fail ("VT == N0.getValueType() && (NumBitsPerElt % 8) == 0 && \"Unexpected value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 44868, __extension__ __PRETTY_FUNCTION__)); | |||
44869 | assert(N->getOperand(1).getValueType() == MVT::i8 &&(static_cast <bool> (N->getOperand(1).getValueType() == MVT::i8 && "Unexpected shift amount type") ? void (0) : __assert_fail ("N->getOperand(1).getValueType() == MVT::i8 && \"Unexpected shift amount type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 44870, __extension__ __PRETTY_FUNCTION__)) | |||
44870 | "Unexpected shift amount type")(static_cast <bool> (N->getOperand(1).getValueType() == MVT::i8 && "Unexpected shift amount type") ? void (0) : __assert_fail ("N->getOperand(1).getValueType() == MVT::i8 && \"Unexpected shift amount type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 44870, __extension__ __PRETTY_FUNCTION__)); | |||
44871 | ||||
44872 | // (shift undef, X) -> 0 | |||
44873 | if (N0.isUndef()) | |||
44874 | return DAG.getConstant(0, SDLoc(N), VT); | |||
44875 | ||||
44876 | // Out of range logical bit shifts are guaranteed to be zero. | |||
44877 | // Out of range arithmetic bit shifts splat the sign bit. | |||
44878 | unsigned ShiftVal = N->getConstantOperandVal(1); | |||
44879 | if (ShiftVal >= NumBitsPerElt) { | |||
44880 | if (LogicalShift) | |||
44881 | return DAG.getConstant(0, SDLoc(N), VT); | |||
44882 | ShiftVal = NumBitsPerElt - 1; | |||
44883 | } | |||
44884 | ||||
44885 | // (shift X, 0) -> X | |||
44886 | if (!ShiftVal) | |||
44887 | return N0; | |||
44888 | ||||
44889 | // (shift 0, C) -> 0 | |||
44890 | if (ISD::isBuildVectorAllZeros(N0.getNode())) | |||
44891 | // N0 is all zeros or undef. We guarantee that the bits shifted into the | |||
44892 | // result are all zeros, not undef. | |||
44893 | return DAG.getConstant(0, SDLoc(N), VT); | |||
44894 | ||||
44895 | // (VSRAI -1, C) -> -1 | |||
44896 | if (!LogicalShift && ISD::isBuildVectorAllOnes(N0.getNode())) | |||
44897 | // N0 is all ones or undef. We guarantee that the bits shifted into the | |||
44898 | // result are all ones, not undef. | |||
44899 | return DAG.getConstant(-1, SDLoc(N), VT); | |||
44900 | ||||
44901 | // (shift (shift X, C2), C1) -> (shift X, (C1 + C2)) | |||
44902 | if (Opcode == N0.getOpcode()) { | |||
44903 | unsigned ShiftVal2 = cast<ConstantSDNode>(N0.getOperand(1))->getZExtValue(); | |||
44904 | unsigned NewShiftVal = ShiftVal + ShiftVal2; | |||
44905 | if (NewShiftVal >= NumBitsPerElt) { | |||
44906 | // Out of range logical bit shifts are guaranteed to be zero. | |||
44907 | // Out of range arithmetic bit shifts splat the sign bit. | |||
44908 | if (LogicalShift) | |||
44909 | return DAG.getConstant(0, SDLoc(N), VT); | |||
44910 | NewShiftVal = NumBitsPerElt - 1; | |||
44911 | } | |||
44912 | return DAG.getNode(Opcode, SDLoc(N), VT, N0.getOperand(0), | |||
44913 | DAG.getTargetConstant(NewShiftVal, SDLoc(N), MVT::i8)); | |||
44914 | } | |||
44915 | ||||
44916 | // We can decode 'whole byte' logical bit shifts as shuffles. | |||
44917 | if (LogicalShift && (ShiftVal % 8) == 0) { | |||
44918 | SDValue Op(N, 0); | |||
44919 | if (SDValue Res = combineX86ShufflesRecursively(Op, DAG, Subtarget)) | |||
44920 | return Res; | |||
44921 | } | |||
44922 | ||||
44923 | // Constant Folding. | |||
44924 | APInt UndefElts; | |||
44925 | SmallVector<APInt, 32> EltBits; | |||
44926 | if (N->isOnlyUserOf(N0.getNode()) && | |||
44927 | getTargetConstantBitsFromNode(N0, NumBitsPerElt, UndefElts, EltBits)) { | |||
44928 | assert(EltBits.size() == VT.getVectorNumElements() &&(static_cast <bool> (EltBits.size() == VT.getVectorNumElements () && "Unexpected shift value type") ? void (0) : __assert_fail ("EltBits.size() == VT.getVectorNumElements() && \"Unexpected shift value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 44929, __extension__ __PRETTY_FUNCTION__)) | |||
44929 | "Unexpected shift value type")(static_cast <bool> (EltBits.size() == VT.getVectorNumElements () && "Unexpected shift value type") ? void (0) : __assert_fail ("EltBits.size() == VT.getVectorNumElements() && \"Unexpected shift value type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 44929, __extension__ __PRETTY_FUNCTION__)); | |||
44930 | // Undef elements need to fold to 0. It's possible SimplifyDemandedBits | |||
44931 | // created an undef input due to no input bits being demanded, but user | |||
44932 | // still expects 0 in other bits. | |||
44933 | for (unsigned i = 0, e = EltBits.size(); i != e; ++i) { | |||
44934 | APInt &Elt = EltBits[i]; | |||
44935 | if (UndefElts[i]) | |||
44936 | Elt = 0; | |||
44937 | else if (X86ISD::VSHLI == Opcode) | |||
44938 | Elt <<= ShiftVal; | |||
44939 | else if (X86ISD::VSRAI == Opcode) | |||
44940 | Elt.ashrInPlace(ShiftVal); | |||
44941 | else | |||
44942 | Elt.lshrInPlace(ShiftVal); | |||
44943 | } | |||
44944 | // Reset undef elements since they were zeroed above. | |||
44945 | UndefElts = 0; | |||
44946 | return getConstVector(EltBits, UndefElts, VT.getSimpleVT(), DAG, SDLoc(N)); | |||
44947 | } | |||
44948 | ||||
44949 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
44950 | if (TLI.SimplifyDemandedBits(SDValue(N, 0), | |||
44951 | APInt::getAllOnesValue(NumBitsPerElt), DCI)) | |||
44952 | return SDValue(N, 0); | |||
44953 | ||||
44954 | return SDValue(); | |||
44955 | } | |||
44956 | ||||
44957 | static SDValue combineVectorInsert(SDNode *N, SelectionDAG &DAG, | |||
44958 | TargetLowering::DAGCombinerInfo &DCI, | |||
44959 | const X86Subtarget &Subtarget) { | |||
44960 | EVT VT = N->getValueType(0); | |||
44961 | assert(((N->getOpcode() == X86ISD::PINSRB && VT == MVT::v16i8) ||(static_cast <bool> (((N->getOpcode() == X86ISD::PINSRB && VT == MVT::v16i8) || (N->getOpcode() == X86ISD ::PINSRW && VT == MVT::v8i16) || N->getOpcode() == ISD::INSERT_VECTOR_ELT) && "Unexpected vector insertion" ) ? void (0) : __assert_fail ("((N->getOpcode() == X86ISD::PINSRB && VT == MVT::v16i8) || (N->getOpcode() == X86ISD::PINSRW && VT == MVT::v8i16) || N->getOpcode() == ISD::INSERT_VECTOR_ELT) && \"Unexpected vector insertion\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 44964, __extension__ __PRETTY_FUNCTION__)) | |||
44962 | (N->getOpcode() == X86ISD::PINSRW && VT == MVT::v8i16) ||(static_cast <bool> (((N->getOpcode() == X86ISD::PINSRB && VT == MVT::v16i8) || (N->getOpcode() == X86ISD ::PINSRW && VT == MVT::v8i16) || N->getOpcode() == ISD::INSERT_VECTOR_ELT) && "Unexpected vector insertion" ) ? void (0) : __assert_fail ("((N->getOpcode() == X86ISD::PINSRB && VT == MVT::v16i8) || (N->getOpcode() == X86ISD::PINSRW && VT == MVT::v8i16) || N->getOpcode() == ISD::INSERT_VECTOR_ELT) && \"Unexpected vector insertion\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 44964, __extension__ __PRETTY_FUNCTION__)) | |||
44963 | N->getOpcode() == ISD::INSERT_VECTOR_ELT) &&(static_cast <bool> (((N->getOpcode() == X86ISD::PINSRB && VT == MVT::v16i8) || (N->getOpcode() == X86ISD ::PINSRW && VT == MVT::v8i16) || N->getOpcode() == ISD::INSERT_VECTOR_ELT) && "Unexpected vector insertion" ) ? void (0) : __assert_fail ("((N->getOpcode() == X86ISD::PINSRB && VT == MVT::v16i8) || (N->getOpcode() == X86ISD::PINSRW && VT == MVT::v8i16) || N->getOpcode() == ISD::INSERT_VECTOR_ELT) && \"Unexpected vector insertion\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 44964, __extension__ __PRETTY_FUNCTION__)) | |||
44964 | "Unexpected vector insertion")(static_cast <bool> (((N->getOpcode() == X86ISD::PINSRB && VT == MVT::v16i8) || (N->getOpcode() == X86ISD ::PINSRW && VT == MVT::v8i16) || N->getOpcode() == ISD::INSERT_VECTOR_ELT) && "Unexpected vector insertion" ) ? void (0) : __assert_fail ("((N->getOpcode() == X86ISD::PINSRB && VT == MVT::v16i8) || (N->getOpcode() == X86ISD::PINSRW && VT == MVT::v8i16) || N->getOpcode() == ISD::INSERT_VECTOR_ELT) && \"Unexpected vector insertion\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 44964, __extension__ __PRETTY_FUNCTION__)); | |||
44965 | ||||
44966 | if (N->getOpcode() == X86ISD::PINSRB || N->getOpcode() == X86ISD::PINSRW) { | |||
44967 | unsigned NumBitsPerElt = VT.getScalarSizeInBits(); | |||
44968 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
44969 | if (TLI.SimplifyDemandedBits(SDValue(N, 0), | |||
44970 | APInt::getAllOnesValue(NumBitsPerElt), DCI)) | |||
44971 | return SDValue(N, 0); | |||
44972 | } | |||
44973 | ||||
44974 | // Attempt to combine insertion patterns to a shuffle. | |||
44975 | if (VT.isSimple() && DCI.isAfterLegalizeDAG()) { | |||
44976 | SDValue Op(N, 0); | |||
44977 | if (SDValue Res = combineX86ShufflesRecursively(Op, DAG, Subtarget)) | |||
44978 | return Res; | |||
44979 | } | |||
44980 | ||||
44981 | return SDValue(); | |||
44982 | } | |||
44983 | ||||
44984 | /// Recognize the distinctive (AND (setcc ...) (setcc ..)) where both setccs | |||
44985 | /// reference the same FP CMP, and rewrite for CMPEQSS and friends. Likewise for | |||
44986 | /// OR -> CMPNEQSS. | |||
44987 | static SDValue combineCompareEqual(SDNode *N, SelectionDAG &DAG, | |||
44988 | TargetLowering::DAGCombinerInfo &DCI, | |||
44989 | const X86Subtarget &Subtarget) { | |||
44990 | unsigned opcode; | |||
44991 | ||||
44992 | // SSE1 supports CMP{eq|ne}SS, and SSE2 added CMP{eq|ne}SD, but | |||
44993 | // we're requiring SSE2 for both. | |||
44994 | if (Subtarget.hasSSE2() && isAndOrOfSetCCs(SDValue(N, 0U), opcode)) { | |||
44995 | SDValue N0 = N->getOperand(0); | |||
44996 | SDValue N1 = N->getOperand(1); | |||
44997 | SDValue CMP0 = N0.getOperand(1); | |||
44998 | SDValue CMP1 = N1.getOperand(1); | |||
44999 | SDLoc DL(N); | |||
45000 | ||||
45001 | // The SETCCs should both refer to the same CMP. | |||
45002 | if (CMP0.getOpcode() != X86ISD::FCMP || CMP0 != CMP1) | |||
45003 | return SDValue(); | |||
45004 | ||||
45005 | SDValue CMP00 = CMP0->getOperand(0); | |||
45006 | SDValue CMP01 = CMP0->getOperand(1); | |||
45007 | EVT VT = CMP00.getValueType(); | |||
45008 | ||||
45009 | if (VT == MVT::f32 || VT == MVT::f64 || | |||
45010 | (VT == MVT::f16 && Subtarget.hasFP16())) { | |||
45011 | bool ExpectingFlags = false; | |||
45012 | // Check for any users that want flags: | |||
45013 | for (SDNode::use_iterator UI = N->use_begin(), UE = N->use_end(); | |||
45014 | !ExpectingFlags && UI != UE; ++UI) | |||
45015 | switch (UI->getOpcode()) { | |||
45016 | default: | |||
45017 | case ISD::BR_CC: | |||
45018 | case ISD::BRCOND: | |||
45019 | case ISD::SELECT: | |||
45020 | ExpectingFlags = true; | |||
45021 | break; | |||
45022 | case ISD::CopyToReg: | |||
45023 | case ISD::SIGN_EXTEND: | |||
45024 | case ISD::ZERO_EXTEND: | |||
45025 | case ISD::ANY_EXTEND: | |||
45026 | break; | |||
45027 | } | |||
45028 | ||||
45029 | if (!ExpectingFlags) { | |||
45030 | enum X86::CondCode cc0 = (enum X86::CondCode)N0.getConstantOperandVal(0); | |||
45031 | enum X86::CondCode cc1 = (enum X86::CondCode)N1.getConstantOperandVal(0); | |||
45032 | ||||
45033 | if (cc1 == X86::COND_E || cc1 == X86::COND_NE) { | |||
45034 | X86::CondCode tmp = cc0; | |||
45035 | cc0 = cc1; | |||
45036 | cc1 = tmp; | |||
45037 | } | |||
45038 | ||||
45039 | if ((cc0 == X86::COND_E && cc1 == X86::COND_NP) || | |||
45040 | (cc0 == X86::COND_NE && cc1 == X86::COND_P)) { | |||
45041 | // FIXME: need symbolic constants for these magic numbers. | |||
45042 | // See X86ATTInstPrinter.cpp:printSSECC(). | |||
45043 | unsigned x86cc = (cc0 == X86::COND_E) ? 0 : 4; | |||
45044 | if (Subtarget.hasAVX512()) { | |||
45045 | SDValue FSetCC = | |||
45046 | DAG.getNode(X86ISD::FSETCCM, DL, MVT::v1i1, CMP00, CMP01, | |||
45047 | DAG.getTargetConstant(x86cc, DL, MVT::i8)); | |||
45048 | // Need to fill with zeros to ensure the bitcast will produce zeroes | |||
45049 | // for the upper bits. An EXTRACT_ELEMENT here wouldn't guarantee that. | |||
45050 | SDValue Ins = DAG.getNode(ISD::INSERT_SUBVECTOR, DL, MVT::v16i1, | |||
45051 | DAG.getConstant(0, DL, MVT::v16i1), | |||
45052 | FSetCC, DAG.getIntPtrConstant(0, DL)); | |||
45053 | return DAG.getZExtOrTrunc(DAG.getBitcast(MVT::i16, Ins), DL, | |||
45054 | N->getSimpleValueType(0)); | |||
45055 | } | |||
45056 | SDValue OnesOrZeroesF = | |||
45057 | DAG.getNode(X86ISD::FSETCC, DL, CMP00.getValueType(), CMP00, | |||
45058 | CMP01, DAG.getTargetConstant(x86cc, DL, MVT::i8)); | |||
45059 | ||||
45060 | bool is64BitFP = (CMP00.getValueType() == MVT::f64); | |||
45061 | MVT IntVT = is64BitFP ? MVT::i64 : MVT::i32; | |||
45062 | ||||
45063 | if (is64BitFP && !Subtarget.is64Bit()) { | |||
45064 | // On a 32-bit target, we cannot bitcast the 64-bit float to a | |||
45065 | // 64-bit integer, since that's not a legal type. Since | |||
45066 | // OnesOrZeroesF is all ones of all zeroes, we don't need all the | |||
45067 | // bits, but can do this little dance to extract the lowest 32 bits | |||
45068 | // and work with those going forward. | |||
45069 | SDValue Vector64 = DAG.getNode(ISD::SCALAR_TO_VECTOR, DL, MVT::v2f64, | |||
45070 | OnesOrZeroesF); | |||
45071 | SDValue Vector32 = DAG.getBitcast(MVT::v4f32, Vector64); | |||
45072 | OnesOrZeroesF = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, MVT::f32, | |||
45073 | Vector32, DAG.getIntPtrConstant(0, DL)); | |||
45074 | IntVT = MVT::i32; | |||
45075 | } | |||
45076 | ||||
45077 | SDValue OnesOrZeroesI = DAG.getBitcast(IntVT, OnesOrZeroesF); | |||
45078 | SDValue ANDed = DAG.getNode(ISD::AND, DL, IntVT, OnesOrZeroesI, | |||
45079 | DAG.getConstant(1, DL, IntVT)); | |||
45080 | SDValue OneBitOfTruth = DAG.getNode(ISD::TRUNCATE, DL, MVT::i8, | |||
45081 | ANDed); | |||
45082 | return OneBitOfTruth; | |||
45083 | } | |||
45084 | } | |||
45085 | } | |||
45086 | } | |||
45087 | return SDValue(); | |||
45088 | } | |||
45089 | ||||
45090 | /// Try to fold: (and (xor X, -1), Y) -> (andnp X, Y). | |||
45091 | static SDValue combineANDXORWithAllOnesIntoANDNP(SDNode *N, SelectionDAG &DAG) { | |||
45092 | assert(N->getOpcode() == ISD::AND)(static_cast <bool> (N->getOpcode() == ISD::AND) ? void (0) : __assert_fail ("N->getOpcode() == ISD::AND", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 45092, __extension__ __PRETTY_FUNCTION__)); | |||
45093 | ||||
45094 | MVT VT = N->getSimpleValueType(0); | |||
45095 | if (!VT.is128BitVector() && !VT.is256BitVector() && !VT.is512BitVector()) | |||
45096 | return SDValue(); | |||
45097 | ||||
45098 | SDValue X, Y; | |||
45099 | SDValue N0 = N->getOperand(0); | |||
45100 | SDValue N1 = N->getOperand(1); | |||
45101 | ||||
45102 | auto GetNot = [&VT, &DAG](SDValue V) { | |||
45103 | // Basic X = NOT(Y) detection. | |||
45104 | if (SDValue Not = IsNOT(V, DAG)) | |||
45105 | return Not; | |||
45106 | // Fold BROADCAST(NOT(Y)) -> BROADCAST(Y). | |||
45107 | if (V.getOpcode() == X86ISD::VBROADCAST) { | |||
45108 | SDValue Src = V.getOperand(0); | |||
45109 | EVT SrcVT = Src.getValueType(); | |||
45110 | if (!SrcVT.isVector()) | |||
45111 | return SDValue(); | |||
45112 | if (SDValue Not = IsNOT(Src, DAG)) | |||
45113 | return DAG.getNode(X86ISD::VBROADCAST, SDLoc(V), VT, | |||
45114 | DAG.getBitcast(SrcVT, Not)); | |||
45115 | } | |||
45116 | return SDValue(); | |||
45117 | }; | |||
45118 | ||||
45119 | if (SDValue Not = GetNot(N0)) { | |||
45120 | X = Not; | |||
45121 | Y = N1; | |||
45122 | } else if (SDValue Not = GetNot(N1)) { | |||
45123 | X = Not; | |||
45124 | Y = N0; | |||
45125 | } else | |||
45126 | return SDValue(); | |||
45127 | ||||
45128 | X = DAG.getBitcast(VT, X); | |||
45129 | Y = DAG.getBitcast(VT, Y); | |||
45130 | return DAG.getNode(X86ISD::ANDNP, SDLoc(N), VT, X, Y); | |||
45131 | } | |||
45132 | ||||
45133 | // Try to widen AND, OR and XOR nodes to VT in order to remove casts around | |||
45134 | // logical operations, like in the example below. | |||
45135 | // or (and (truncate x, truncate y)), | |||
45136 | // (xor (truncate z, build_vector (constants))) | |||
45137 | // Given a target type \p VT, we generate | |||
45138 | // or (and x, y), (xor z, zext(build_vector (constants))) | |||
45139 | // given x, y and z are of type \p VT. We can do so, if operands are either | |||
45140 | // truncates from VT types, the second operand is a vector of constants or can | |||
45141 | // be recursively promoted. | |||
45142 | static SDValue PromoteMaskArithmetic(SDNode *N, EVT VT, SelectionDAG &DAG, | |||
45143 | unsigned Depth) { | |||
45144 | // Limit recursion to avoid excessive compile times. | |||
45145 | if (Depth >= SelectionDAG::MaxRecursionDepth) | |||
45146 | return SDValue(); | |||
45147 | ||||
45148 | if (N->getOpcode() != ISD::XOR && N->getOpcode() != ISD::AND && | |||
45149 | N->getOpcode() != ISD::OR) | |||
45150 | return SDValue(); | |||
45151 | ||||
45152 | SDValue N0 = N->getOperand(0); | |||
45153 | SDValue N1 = N->getOperand(1); | |||
45154 | SDLoc DL(N); | |||
45155 | ||||
45156 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
45157 | if (!TLI.isOperationLegalOrPromote(N->getOpcode(), VT)) | |||
45158 | return SDValue(); | |||
45159 | ||||
45160 | if (SDValue NN0 = PromoteMaskArithmetic(N0.getNode(), VT, DAG, Depth + 1)) | |||
45161 | N0 = NN0; | |||
45162 | else { | |||
45163 | // The Left side has to be a trunc. | |||
45164 | if (N0.getOpcode() != ISD::TRUNCATE) | |||
45165 | return SDValue(); | |||
45166 | ||||
45167 | // The type of the truncated inputs. | |||
45168 | if (N0.getOperand(0).getValueType() != VT) | |||
45169 | return SDValue(); | |||
45170 | ||||
45171 | N0 = N0.getOperand(0); | |||
45172 | } | |||
45173 | ||||
45174 | if (SDValue NN1 = PromoteMaskArithmetic(N1.getNode(), VT, DAG, Depth + 1)) | |||
45175 | N1 = NN1; | |||
45176 | else { | |||
45177 | // The right side has to be a 'trunc' or a constant vector. | |||
45178 | bool RHSTrunc = N1.getOpcode() == ISD::TRUNCATE && | |||
45179 | N1.getOperand(0).getValueType() == VT; | |||
45180 | if (!RHSTrunc && !ISD::isBuildVectorOfConstantSDNodes(N1.getNode())) | |||
45181 | return SDValue(); | |||
45182 | ||||
45183 | if (RHSTrunc) | |||
45184 | N1 = N1.getOperand(0); | |||
45185 | else | |||
45186 | N1 = DAG.getNode(ISD::ZERO_EXTEND, DL, VT, N1); | |||
45187 | } | |||
45188 | ||||
45189 | return DAG.getNode(N->getOpcode(), DL, VT, N0, N1); | |||
45190 | } | |||
45191 | ||||
45192 | // On AVX/AVX2 the type v8i1 is legalized to v8i16, which is an XMM sized | |||
45193 | // register. In most cases we actually compare or select YMM-sized registers | |||
45194 | // and mixing the two types creates horrible code. This method optimizes | |||
45195 | // some of the transition sequences. | |||
45196 | // Even with AVX-512 this is still useful for removing casts around logical | |||
45197 | // operations on vXi1 mask types. | |||
45198 | static SDValue PromoteMaskArithmetic(SDNode *N, SelectionDAG &DAG, | |||
45199 | const X86Subtarget &Subtarget) { | |||
45200 | EVT VT = N->getValueType(0); | |||
45201 | assert(VT.isVector() && "Expected vector type")(static_cast <bool> (VT.isVector() && "Expected vector type" ) ? void (0) : __assert_fail ("VT.isVector() && \"Expected vector type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 45201, __extension__ __PRETTY_FUNCTION__)); | |||
45202 | ||||
45203 | SDLoc DL(N); | |||
45204 | assert((N->getOpcode() == ISD::ANY_EXTEND ||(static_cast <bool> ((N->getOpcode() == ISD::ANY_EXTEND || N->getOpcode() == ISD::ZERO_EXTEND || N->getOpcode( ) == ISD::SIGN_EXTEND) && "Invalid Node") ? void (0) : __assert_fail ("(N->getOpcode() == ISD::ANY_EXTEND || N->getOpcode() == ISD::ZERO_EXTEND || N->getOpcode() == ISD::SIGN_EXTEND) && \"Invalid Node\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 45206, __extension__ __PRETTY_FUNCTION__)) | |||
45205 | N->getOpcode() == ISD::ZERO_EXTEND ||(static_cast <bool> ((N->getOpcode() == ISD::ANY_EXTEND || N->getOpcode() == ISD::ZERO_EXTEND || N->getOpcode( ) == ISD::SIGN_EXTEND) && "Invalid Node") ? void (0) : __assert_fail ("(N->getOpcode() == ISD::ANY_EXTEND || N->getOpcode() == ISD::ZERO_EXTEND || N->getOpcode() == ISD::SIGN_EXTEND) && \"Invalid Node\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 45206, __extension__ __PRETTY_FUNCTION__)) | |||
45206 | N->getOpcode() == ISD::SIGN_EXTEND) && "Invalid Node")(static_cast <bool> ((N->getOpcode() == ISD::ANY_EXTEND || N->getOpcode() == ISD::ZERO_EXTEND || N->getOpcode( ) == ISD::SIGN_EXTEND) && "Invalid Node") ? void (0) : __assert_fail ("(N->getOpcode() == ISD::ANY_EXTEND || N->getOpcode() == ISD::ZERO_EXTEND || N->getOpcode() == ISD::SIGN_EXTEND) && \"Invalid Node\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 45206, __extension__ __PRETTY_FUNCTION__)); | |||
45207 | ||||
45208 | SDValue Narrow = N->getOperand(0); | |||
45209 | EVT NarrowVT = Narrow.getValueType(); | |||
45210 | ||||
45211 | // Generate the wide operation. | |||
45212 | SDValue Op = PromoteMaskArithmetic(Narrow.getNode(), VT, DAG, 0); | |||
45213 | if (!Op) | |||
45214 | return SDValue(); | |||
45215 | switch (N->getOpcode()) { | |||
45216 | default: llvm_unreachable("Unexpected opcode")::llvm::llvm_unreachable_internal("Unexpected opcode", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 45216); | |||
45217 | case ISD::ANY_EXTEND: | |||
45218 | return Op; | |||
45219 | case ISD::ZERO_EXTEND: | |||
45220 | return DAG.getZeroExtendInReg(Op, DL, NarrowVT); | |||
45221 | case ISD::SIGN_EXTEND: | |||
45222 | return DAG.getNode(ISD::SIGN_EXTEND_INREG, DL, VT, | |||
45223 | Op, DAG.getValueType(NarrowVT)); | |||
45224 | } | |||
45225 | } | |||
45226 | ||||
45227 | static unsigned convertIntLogicToFPLogicOpcode(unsigned Opcode) { | |||
45228 | unsigned FPOpcode; | |||
45229 | switch (Opcode) { | |||
45230 | default: llvm_unreachable("Unexpected input node for FP logic conversion")::llvm::llvm_unreachable_internal("Unexpected input node for FP logic conversion" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 45230); | |||
45231 | case ISD::AND: FPOpcode = X86ISD::FAND; break; | |||
45232 | case ISD::OR: FPOpcode = X86ISD::FOR; break; | |||
45233 | case ISD::XOR: FPOpcode = X86ISD::FXOR; break; | |||
45234 | } | |||
45235 | return FPOpcode; | |||
45236 | } | |||
45237 | ||||
45238 | /// If both input operands of a logic op are being cast from floating point | |||
45239 | /// types, try to convert this into a floating point logic node to avoid | |||
45240 | /// unnecessary moves from SSE to integer registers. | |||
45241 | static SDValue convertIntLogicToFPLogic(SDNode *N, SelectionDAG &DAG, | |||
45242 | const X86Subtarget &Subtarget) { | |||
45243 | EVT VT = N->getValueType(0); | |||
45244 | SDValue N0 = N->getOperand(0); | |||
45245 | SDValue N1 = N->getOperand(1); | |||
45246 | SDLoc DL(N); | |||
45247 | ||||
45248 | if (N0.getOpcode() != ISD::BITCAST || N1.getOpcode() != ISD::BITCAST) | |||
45249 | return SDValue(); | |||
45250 | ||||
45251 | SDValue N00 = N0.getOperand(0); | |||
45252 | SDValue N10 = N1.getOperand(0); | |||
45253 | EVT N00Type = N00.getValueType(); | |||
45254 | EVT N10Type = N10.getValueType(); | |||
45255 | ||||
45256 | // Ensure that both types are the same and are legal scalar fp types. | |||
45257 | if (N00Type != N10Type || !((Subtarget.hasSSE1() && N00Type == MVT::f32) || | |||
45258 | (Subtarget.hasSSE2() && N00Type == MVT::f64) || | |||
45259 | (Subtarget.hasFP16() && N00Type == MVT::f16))) | |||
45260 | return SDValue(); | |||
45261 | ||||
45262 | unsigned FPOpcode = convertIntLogicToFPLogicOpcode(N->getOpcode()); | |||
45263 | SDValue FPLogic = DAG.getNode(FPOpcode, DL, N00Type, N00, N10); | |||
45264 | return DAG.getBitcast(VT, FPLogic); | |||
45265 | } | |||
45266 | ||||
45267 | // Attempt to fold BITOP(MOVMSK(X),MOVMSK(Y)) -> MOVMSK(BITOP(X,Y)) | |||
45268 | // to reduce XMM->GPR traffic. | |||
45269 | static SDValue combineBitOpWithMOVMSK(SDNode *N, SelectionDAG &DAG) { | |||
45270 | unsigned Opc = N->getOpcode(); | |||
45271 | assert((Opc == ISD::OR || Opc == ISD::AND || Opc == ISD::XOR) &&(static_cast <bool> ((Opc == ISD::OR || Opc == ISD::AND || Opc == ISD::XOR) && "Unexpected bit opcode") ? void (0) : __assert_fail ("(Opc == ISD::OR || Opc == ISD::AND || Opc == ISD::XOR) && \"Unexpected bit opcode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 45272, __extension__ __PRETTY_FUNCTION__)) | |||
45272 | "Unexpected bit opcode")(static_cast <bool> ((Opc == ISD::OR || Opc == ISD::AND || Opc == ISD::XOR) && "Unexpected bit opcode") ? void (0) : __assert_fail ("(Opc == ISD::OR || Opc == ISD::AND || Opc == ISD::XOR) && \"Unexpected bit opcode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 45272, __extension__ __PRETTY_FUNCTION__)); | |||
45273 | ||||
45274 | SDValue N0 = N->getOperand(0); | |||
45275 | SDValue N1 = N->getOperand(1); | |||
45276 | ||||
45277 | // Both operands must be single use MOVMSK. | |||
45278 | if (N0.getOpcode() != X86ISD::MOVMSK || !N0.hasOneUse() || | |||
45279 | N1.getOpcode() != X86ISD::MOVMSK || !N1.hasOneUse()) | |||
45280 | return SDValue(); | |||
45281 | ||||
45282 | SDValue Vec0 = N0.getOperand(0); | |||
45283 | SDValue Vec1 = N1.getOperand(0); | |||
45284 | EVT VecVT0 = Vec0.getValueType(); | |||
45285 | EVT VecVT1 = Vec1.getValueType(); | |||
45286 | ||||
45287 | // Both MOVMSK operands must be from vectors of the same size and same element | |||
45288 | // size, but its OK for a fp/int diff. | |||
45289 | if (VecVT0.getSizeInBits() != VecVT1.getSizeInBits() || | |||
45290 | VecVT0.getScalarSizeInBits() != VecVT1.getScalarSizeInBits()) | |||
45291 | return SDValue(); | |||
45292 | ||||
45293 | SDLoc DL(N); | |||
45294 | unsigned VecOpc = | |||
45295 | VecVT0.isFloatingPoint() ? convertIntLogicToFPLogicOpcode(Opc) : Opc; | |||
45296 | SDValue Result = | |||
45297 | DAG.getNode(VecOpc, DL, VecVT0, Vec0, DAG.getBitcast(VecVT0, Vec1)); | |||
45298 | return DAG.getNode(X86ISD::MOVMSK, DL, MVT::i32, Result); | |||
45299 | } | |||
45300 | ||||
45301 | /// If this is a zero/all-bits result that is bitwise-anded with a low bits | |||
45302 | /// mask. (Mask == 1 for the x86 lowering of a SETCC + ZEXT), replace the 'and' | |||
45303 | /// with a shift-right to eliminate loading the vector constant mask value. | |||
45304 | static SDValue combineAndMaskToShift(SDNode *N, SelectionDAG &DAG, | |||
45305 | const X86Subtarget &Subtarget) { | |||
45306 | SDValue Op0 = peekThroughBitcasts(N->getOperand(0)); | |||
45307 | SDValue Op1 = peekThroughBitcasts(N->getOperand(1)); | |||
45308 | EVT VT0 = Op0.getValueType(); | |||
45309 | EVT VT1 = Op1.getValueType(); | |||
45310 | ||||
45311 | if (VT0 != VT1 || !VT0.isSimple() || !VT0.isInteger()) | |||
45312 | return SDValue(); | |||
45313 | ||||
45314 | APInt SplatVal; | |||
45315 | if (!ISD::isConstantSplatVector(Op1.getNode(), SplatVal) || | |||
45316 | !SplatVal.isMask()) | |||
45317 | return SDValue(); | |||
45318 | ||||
45319 | // Don't prevent creation of ANDN. | |||
45320 | if (isBitwiseNot(Op0)) | |||
45321 | return SDValue(); | |||
45322 | ||||
45323 | if (!SupportedVectorShiftWithImm(VT0.getSimpleVT(), Subtarget, ISD::SRL)) | |||
45324 | return SDValue(); | |||
45325 | ||||
45326 | unsigned EltBitWidth = VT0.getScalarSizeInBits(); | |||
45327 | if (EltBitWidth != DAG.ComputeNumSignBits(Op0)) | |||
45328 | return SDValue(); | |||
45329 | ||||
45330 | SDLoc DL(N); | |||
45331 | unsigned ShiftVal = SplatVal.countTrailingOnes(); | |||
45332 | SDValue ShAmt = DAG.getTargetConstant(EltBitWidth - ShiftVal, DL, MVT::i8); | |||
45333 | SDValue Shift = DAG.getNode(X86ISD::VSRLI, DL, VT0, Op0, ShAmt); | |||
45334 | return DAG.getBitcast(N->getValueType(0), Shift); | |||
45335 | } | |||
45336 | ||||
45337 | // Get the index node from the lowered DAG of a GEP IR instruction with one | |||
45338 | // indexing dimension. | |||
45339 | static SDValue getIndexFromUnindexedLoad(LoadSDNode *Ld) { | |||
45340 | if (Ld->isIndexed()) | |||
45341 | return SDValue(); | |||
45342 | ||||
45343 | SDValue Base = Ld->getBasePtr(); | |||
45344 | ||||
45345 | if (Base.getOpcode() != ISD::ADD) | |||
45346 | return SDValue(); | |||
45347 | ||||
45348 | SDValue ShiftedIndex = Base.getOperand(0); | |||
45349 | ||||
45350 | if (ShiftedIndex.getOpcode() != ISD::SHL) | |||
45351 | return SDValue(); | |||
45352 | ||||
45353 | return ShiftedIndex.getOperand(0); | |||
45354 | ||||
45355 | } | |||
45356 | ||||
45357 | static bool hasBZHI(const X86Subtarget &Subtarget, MVT VT) { | |||
45358 | if (Subtarget.hasBMI2() && VT.isScalarInteger()) { | |||
45359 | switch (VT.getSizeInBits()) { | |||
45360 | default: return false; | |||
45361 | case 64: return Subtarget.is64Bit() ? true : false; | |||
45362 | case 32: return true; | |||
45363 | } | |||
45364 | } | |||
45365 | return false; | |||
45366 | } | |||
45367 | ||||
45368 | // This function recognizes cases where X86 bzhi instruction can replace and | |||
45369 | // 'and-load' sequence. | |||
45370 | // In case of loading integer value from an array of constants which is defined | |||
45371 | // as follows: | |||
45372 | // | |||
45373 | // int array[SIZE] = {0x0, 0x1, 0x3, 0x7, 0xF ..., 2^(SIZE-1) - 1} | |||
45374 | // | |||
45375 | // then applying a bitwise and on the result with another input. | |||
45376 | // It's equivalent to performing bzhi (zero high bits) on the input, with the | |||
45377 | // same index of the load. | |||
45378 | static SDValue combineAndLoadToBZHI(SDNode *Node, SelectionDAG &DAG, | |||
45379 | const X86Subtarget &Subtarget) { | |||
45380 | MVT VT = Node->getSimpleValueType(0); | |||
45381 | SDLoc dl(Node); | |||
45382 | ||||
45383 | // Check if subtarget has BZHI instruction for the node's type | |||
45384 | if (!hasBZHI(Subtarget, VT)) | |||
45385 | return SDValue(); | |||
45386 | ||||
45387 | // Try matching the pattern for both operands. | |||
45388 | for (unsigned i = 0; i < 2; i++) { | |||
45389 | SDValue N = Node->getOperand(i); | |||
45390 | LoadSDNode *Ld = dyn_cast<LoadSDNode>(N.getNode()); | |||
45391 | ||||
45392 | // continue if the operand is not a load instruction | |||
45393 | if (!Ld) | |||
45394 | return SDValue(); | |||
45395 | ||||
45396 | const Value *MemOp = Ld->getMemOperand()->getValue(); | |||
45397 | ||||
45398 | if (!MemOp) | |||
45399 | return SDValue(); | |||
45400 | ||||
45401 | if (const GetElementPtrInst *GEP = dyn_cast<GetElementPtrInst>(MemOp)) { | |||
45402 | if (GlobalVariable *GV = dyn_cast<GlobalVariable>(GEP->getOperand(0))) { | |||
45403 | if (GV->isConstant() && GV->hasDefinitiveInitializer()) { | |||
45404 | ||||
45405 | Constant *Init = GV->getInitializer(); | |||
45406 | Type *Ty = Init->getType(); | |||
45407 | if (!isa<ConstantDataArray>(Init) || | |||
45408 | !Ty->getArrayElementType()->isIntegerTy() || | |||
45409 | Ty->getArrayElementType()->getScalarSizeInBits() != | |||
45410 | VT.getSizeInBits() || | |||
45411 | Ty->getArrayNumElements() > | |||
45412 | Ty->getArrayElementType()->getScalarSizeInBits()) | |||
45413 | continue; | |||
45414 | ||||
45415 | // Check if the array's constant elements are suitable to our case. | |||
45416 | uint64_t ArrayElementCount = Init->getType()->getArrayNumElements(); | |||
45417 | bool ConstantsMatch = true; | |||
45418 | for (uint64_t j = 0; j < ArrayElementCount; j++) { | |||
45419 | auto *Elem = cast<ConstantInt>(Init->getAggregateElement(j)); | |||
45420 | if (Elem->getZExtValue() != (((uint64_t)1 << j) - 1)) { | |||
45421 | ConstantsMatch = false; | |||
45422 | break; | |||
45423 | } | |||
45424 | } | |||
45425 | if (!ConstantsMatch) | |||
45426 | continue; | |||
45427 | ||||
45428 | // Do the transformation (For 32-bit type): | |||
45429 | // -> (and (load arr[idx]), inp) | |||
45430 | // <- (and (srl 0xFFFFFFFF, (sub 32, idx))) | |||
45431 | // that will be replaced with one bzhi instruction. | |||
45432 | SDValue Inp = (i == 0) ? Node->getOperand(1) : Node->getOperand(0); | |||
45433 | SDValue SizeC = DAG.getConstant(VT.getSizeInBits(), dl, MVT::i32); | |||
45434 | ||||
45435 | // Get the Node which indexes into the array. | |||
45436 | SDValue Index = getIndexFromUnindexedLoad(Ld); | |||
45437 | if (!Index) | |||
45438 | return SDValue(); | |||
45439 | Index = DAG.getZExtOrTrunc(Index, dl, MVT::i32); | |||
45440 | ||||
45441 | SDValue Sub = DAG.getNode(ISD::SUB, dl, MVT::i32, SizeC, Index); | |||
45442 | Sub = DAG.getNode(ISD::TRUNCATE, dl, MVT::i8, Sub); | |||
45443 | ||||
45444 | SDValue AllOnes = DAG.getAllOnesConstant(dl, VT); | |||
45445 | SDValue LShr = DAG.getNode(ISD::SRL, dl, VT, AllOnes, Sub); | |||
45446 | ||||
45447 | return DAG.getNode(ISD::AND, dl, VT, Inp, LShr); | |||
45448 | } | |||
45449 | } | |||
45450 | } | |||
45451 | } | |||
45452 | return SDValue(); | |||
45453 | } | |||
45454 | ||||
45455 | // Look for (and (bitcast (vXi1 (concat_vectors (vYi1 setcc), undef,))), C) | |||
45456 | // Where C is a mask containing the same number of bits as the setcc and | |||
45457 | // where the setcc will freely 0 upper bits of k-register. We can replace the | |||
45458 | // undef in the concat with 0s and remove the AND. This mainly helps with | |||
45459 | // v2i1/v4i1 setcc being casted to scalar. | |||
45460 | static SDValue combineScalarAndWithMaskSetcc(SDNode *N, SelectionDAG &DAG, | |||
45461 | const X86Subtarget &Subtarget) { | |||
45462 | assert(N->getOpcode() == ISD::AND && "Unexpected opcode!")(static_cast <bool> (N->getOpcode() == ISD::AND && "Unexpected opcode!") ? void (0) : __assert_fail ("N->getOpcode() == ISD::AND && \"Unexpected opcode!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 45462, __extension__ __PRETTY_FUNCTION__)); | |||
45463 | ||||
45464 | EVT VT = N->getValueType(0); | |||
45465 | ||||
45466 | // Make sure this is an AND with constant. We will check the value of the | |||
45467 | // constant later. | |||
45468 | if (!isa<ConstantSDNode>(N->getOperand(1))) | |||
45469 | return SDValue(); | |||
45470 | ||||
45471 | // This is implied by the ConstantSDNode. | |||
45472 | assert(!VT.isVector() && "Expected scalar VT!")(static_cast <bool> (!VT.isVector() && "Expected scalar VT!" ) ? void (0) : __assert_fail ("!VT.isVector() && \"Expected scalar VT!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 45472, __extension__ __PRETTY_FUNCTION__)); | |||
45473 | ||||
45474 | if (N->getOperand(0).getOpcode() != ISD::BITCAST || | |||
45475 | !N->getOperand(0).hasOneUse() || | |||
45476 | !N->getOperand(0).getOperand(0).hasOneUse()) | |||
45477 | return SDValue(); | |||
45478 | ||||
45479 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
45480 | SDValue Src = N->getOperand(0).getOperand(0); | |||
45481 | EVT SrcVT = Src.getValueType(); | |||
45482 | if (!SrcVT.isVector() || SrcVT.getVectorElementType() != MVT::i1 || | |||
45483 | !TLI.isTypeLegal(SrcVT)) | |||
45484 | return SDValue(); | |||
45485 | ||||
45486 | if (Src.getOpcode() != ISD::CONCAT_VECTORS) | |||
45487 | return SDValue(); | |||
45488 | ||||
45489 | // We only care about the first subvector of the concat, we expect the | |||
45490 | // other subvectors to be ignored due to the AND if we make the change. | |||
45491 | SDValue SubVec = Src.getOperand(0); | |||
45492 | EVT SubVecVT = SubVec.getValueType(); | |||
45493 | ||||
45494 | // First subvector should be a setcc with a legal result type. The RHS of the | |||
45495 | // AND should be a mask with this many bits. | |||
45496 | if (SubVec.getOpcode() != ISD::SETCC || !TLI.isTypeLegal(SubVecVT) || | |||
45497 | !N->getConstantOperandAPInt(1).isMask(SubVecVT.getVectorNumElements())) | |||
45498 | return SDValue(); | |||
45499 | ||||
45500 | EVT SetccVT = SubVec.getOperand(0).getValueType(); | |||
45501 | if (!TLI.isTypeLegal(SetccVT) || | |||
45502 | !(Subtarget.hasVLX() || SetccVT.is512BitVector())) | |||
45503 | return SDValue(); | |||
45504 | ||||
45505 | if (!(Subtarget.hasBWI() || SetccVT.getScalarSizeInBits() >= 32)) | |||
45506 | return SDValue(); | |||
45507 | ||||
45508 | // We passed all the checks. Rebuild the concat_vectors with zeroes | |||
45509 | // and cast it back to VT. | |||
45510 | SDLoc dl(N); | |||
45511 | SmallVector<SDValue, 4> Ops(Src.getNumOperands(), | |||
45512 | DAG.getConstant(0, dl, SubVecVT)); | |||
45513 | Ops[0] = SubVec; | |||
45514 | SDValue Concat = DAG.getNode(ISD::CONCAT_VECTORS, dl, SrcVT, | |||
45515 | Ops); | |||
45516 | return DAG.getBitcast(VT, Concat); | |||
45517 | } | |||
45518 | ||||
45519 | static SDValue combineAnd(SDNode *N, SelectionDAG &DAG, | |||
45520 | TargetLowering::DAGCombinerInfo &DCI, | |||
45521 | const X86Subtarget &Subtarget) { | |||
45522 | EVT VT = N->getValueType(0); | |||
45523 | ||||
45524 | // If this is SSE1 only convert to FAND to avoid scalarization. | |||
45525 | if (Subtarget.hasSSE1() && !Subtarget.hasSSE2() && VT == MVT::v4i32) { | |||
45526 | return DAG.getBitcast( | |||
45527 | MVT::v4i32, DAG.getNode(X86ISD::FAND, SDLoc(N), MVT::v4f32, | |||
45528 | DAG.getBitcast(MVT::v4f32, N->getOperand(0)), | |||
45529 | DAG.getBitcast(MVT::v4f32, N->getOperand(1)))); | |||
45530 | } | |||
45531 | ||||
45532 | // Use a 32-bit and+zext if upper bits known zero. | |||
45533 | if (VT == MVT::i64 && Subtarget.is64Bit() && | |||
45534 | !isa<ConstantSDNode>(N->getOperand(1))) { | |||
45535 | APInt HiMask = APInt::getHighBitsSet(64, 32); | |||
45536 | if (DAG.MaskedValueIsZero(N->getOperand(1), HiMask) || | |||
45537 | DAG.MaskedValueIsZero(N->getOperand(0), HiMask)) { | |||
45538 | SDLoc dl(N); | |||
45539 | SDValue LHS = DAG.getNode(ISD::TRUNCATE, dl, MVT::i32, N->getOperand(0)); | |||
45540 | SDValue RHS = DAG.getNode(ISD::TRUNCATE, dl, MVT::i32, N->getOperand(1)); | |||
45541 | return DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i64, | |||
45542 | DAG.getNode(ISD::AND, dl, MVT::i32, LHS, RHS)); | |||
45543 | } | |||
45544 | } | |||
45545 | ||||
45546 | // Match all-of bool scalar reductions into a bitcast/movmsk + cmp. | |||
45547 | // TODO: Support multiple SrcOps. | |||
45548 | if (VT == MVT::i1) { | |||
45549 | SmallVector<SDValue, 2> SrcOps; | |||
45550 | SmallVector<APInt, 2> SrcPartials; | |||
45551 | if (matchScalarReduction(SDValue(N, 0), ISD::AND, SrcOps, &SrcPartials) && | |||
45552 | SrcOps.size() == 1) { | |||
45553 | SDLoc dl(N); | |||
45554 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
45555 | unsigned NumElts = SrcOps[0].getValueType().getVectorNumElements(); | |||
45556 | EVT MaskVT = EVT::getIntegerVT(*DAG.getContext(), NumElts); | |||
45557 | SDValue Mask = combineBitcastvxi1(DAG, MaskVT, SrcOps[0], dl, Subtarget); | |||
45558 | if (!Mask && TLI.isTypeLegal(SrcOps[0].getValueType())) | |||
45559 | Mask = DAG.getBitcast(MaskVT, SrcOps[0]); | |||
45560 | if (Mask) { | |||
45561 | assert(SrcPartials[0].getBitWidth() == NumElts &&(static_cast <bool> (SrcPartials[0].getBitWidth() == NumElts && "Unexpected partial reduction mask") ? void (0) : __assert_fail ("SrcPartials[0].getBitWidth() == NumElts && \"Unexpected partial reduction mask\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 45562, __extension__ __PRETTY_FUNCTION__)) | |||
45562 | "Unexpected partial reduction mask")(static_cast <bool> (SrcPartials[0].getBitWidth() == NumElts && "Unexpected partial reduction mask") ? void (0) : __assert_fail ("SrcPartials[0].getBitWidth() == NumElts && \"Unexpected partial reduction mask\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 45562, __extension__ __PRETTY_FUNCTION__)); | |||
45563 | SDValue PartialBits = DAG.getConstant(SrcPartials[0], dl, MaskVT); | |||
45564 | Mask = DAG.getNode(ISD::AND, dl, MaskVT, Mask, PartialBits); | |||
45565 | return DAG.getSetCC(dl, MVT::i1, Mask, PartialBits, ISD::SETEQ); | |||
45566 | } | |||
45567 | } | |||
45568 | } | |||
45569 | ||||
45570 | if (SDValue V = combineScalarAndWithMaskSetcc(N, DAG, Subtarget)) | |||
45571 | return V; | |||
45572 | ||||
45573 | if (SDValue R = combineBitOpWithMOVMSK(N, DAG)) | |||
45574 | return R; | |||
45575 | ||||
45576 | if (DCI.isBeforeLegalizeOps()) | |||
45577 | return SDValue(); | |||
45578 | ||||
45579 | if (SDValue R = combineCompareEqual(N, DAG, DCI, Subtarget)) | |||
45580 | return R; | |||
45581 | ||||
45582 | if (SDValue FPLogic = convertIntLogicToFPLogic(N, DAG, Subtarget)) | |||
45583 | return FPLogic; | |||
45584 | ||||
45585 | if (SDValue R = combineANDXORWithAllOnesIntoANDNP(N, DAG)) | |||
45586 | return R; | |||
45587 | ||||
45588 | if (SDValue ShiftRight = combineAndMaskToShift(N, DAG, Subtarget)) | |||
45589 | return ShiftRight; | |||
45590 | ||||
45591 | if (SDValue R = combineAndLoadToBZHI(N, DAG, Subtarget)) | |||
45592 | return R; | |||
45593 | ||||
45594 | // Attempt to recursively combine a bitmask AND with shuffles. | |||
45595 | if (VT.isVector() && (VT.getScalarSizeInBits() % 8) == 0) { | |||
45596 | SDValue Op(N, 0); | |||
45597 | if (SDValue Res = combineX86ShufflesRecursively(Op, DAG, Subtarget)) | |||
45598 | return Res; | |||
45599 | } | |||
45600 | ||||
45601 | // Attempt to combine a scalar bitmask AND with an extracted shuffle. | |||
45602 | if ((VT.getScalarSizeInBits() % 8) == 0 && | |||
45603 | N->getOperand(0).getOpcode() == ISD::EXTRACT_VECTOR_ELT && | |||
45604 | isa<ConstantSDNode>(N->getOperand(0).getOperand(1))) { | |||
45605 | SDValue BitMask = N->getOperand(1); | |||
45606 | SDValue SrcVec = N->getOperand(0).getOperand(0); | |||
45607 | EVT SrcVecVT = SrcVec.getValueType(); | |||
45608 | ||||
45609 | // Check that the constant bitmask masks whole bytes. | |||
45610 | APInt UndefElts; | |||
45611 | SmallVector<APInt, 64> EltBits; | |||
45612 | if (VT == SrcVecVT.getScalarType() && | |||
45613 | N->getOperand(0)->isOnlyUserOf(SrcVec.getNode()) && | |||
45614 | getTargetConstantBitsFromNode(BitMask, 8, UndefElts, EltBits) && | |||
45615 | llvm::all_of(EltBits, [](const APInt &M) { | |||
45616 | return M.isNullValue() || M.isAllOnesValue(); | |||
45617 | })) { | |||
45618 | unsigned NumElts = SrcVecVT.getVectorNumElements(); | |||
45619 | unsigned Scale = SrcVecVT.getScalarSizeInBits() / 8; | |||
45620 | unsigned Idx = N->getOperand(0).getConstantOperandVal(1); | |||
45621 | ||||
45622 | // Create a root shuffle mask from the byte mask and the extracted index. | |||
45623 | SmallVector<int, 16> ShuffleMask(NumElts * Scale, SM_SentinelUndef); | |||
45624 | for (unsigned i = 0; i != Scale; ++i) { | |||
45625 | if (UndefElts[i]) | |||
45626 | continue; | |||
45627 | int VecIdx = Scale * Idx + i; | |||
45628 | ShuffleMask[VecIdx] = | |||
45629 | EltBits[i].isNullValue() ? SM_SentinelZero : VecIdx; | |||
45630 | } | |||
45631 | ||||
45632 | if (SDValue Shuffle = combineX86ShufflesRecursively( | |||
45633 | {SrcVec}, 0, SrcVec, ShuffleMask, {}, /*Depth*/ 1, | |||
45634 | X86::MaxShuffleCombineDepth, | |||
45635 | /*HasVarMask*/ false, /*AllowVarCrossLaneMask*/ true, | |||
45636 | /*AllowVarPerLaneMask*/ true, DAG, Subtarget)) | |||
45637 | return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, SDLoc(N), VT, Shuffle, | |||
45638 | N->getOperand(0).getOperand(1)); | |||
45639 | } | |||
45640 | } | |||
45641 | ||||
45642 | return SDValue(); | |||
45643 | } | |||
45644 | ||||
45645 | // Canonicalize OR(AND(X,C),AND(Y,~C)) -> OR(AND(X,C),ANDNP(C,Y)) | |||
45646 | static SDValue canonicalizeBitSelect(SDNode *N, SelectionDAG &DAG, | |||
45647 | const X86Subtarget &Subtarget) { | |||
45648 | assert(N->getOpcode() == ISD::OR && "Unexpected Opcode")(static_cast <bool> (N->getOpcode() == ISD::OR && "Unexpected Opcode") ? void (0) : __assert_fail ("N->getOpcode() == ISD::OR && \"Unexpected Opcode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 45648, __extension__ __PRETTY_FUNCTION__)); | |||
45649 | ||||
45650 | MVT VT = N->getSimpleValueType(0); | |||
45651 | if (!VT.isVector() || (VT.getScalarSizeInBits() % 8) != 0) | |||
45652 | return SDValue(); | |||
45653 | ||||
45654 | SDValue N0 = peekThroughBitcasts(N->getOperand(0)); | |||
45655 | SDValue N1 = peekThroughBitcasts(N->getOperand(1)); | |||
45656 | if (N0.getOpcode() != ISD::AND || N1.getOpcode() != ISD::AND) | |||
45657 | return SDValue(); | |||
45658 | ||||
45659 | // On XOP we'll lower to PCMOV so accept one use. With AVX512, we can use | |||
45660 | // VPTERNLOG. Otherwise only do this if either mask has multiple uses already. | |||
45661 | bool UseVPTERNLOG = (Subtarget.hasAVX512() && VT.is512BitVector()) || | |||
45662 | Subtarget.hasVLX(); | |||
45663 | if (!(Subtarget.hasXOP() || UseVPTERNLOG || | |||
45664 | !N0.getOperand(1).hasOneUse() || !N1.getOperand(1).hasOneUse())) | |||
45665 | return SDValue(); | |||
45666 | ||||
45667 | // Attempt to extract constant byte masks. | |||
45668 | APInt UndefElts0, UndefElts1; | |||
45669 | SmallVector<APInt, 32> EltBits0, EltBits1; | |||
45670 | if (!getTargetConstantBitsFromNode(N0.getOperand(1), 8, UndefElts0, EltBits0, | |||
45671 | false, false)) | |||
45672 | return SDValue(); | |||
45673 | if (!getTargetConstantBitsFromNode(N1.getOperand(1), 8, UndefElts1, EltBits1, | |||
45674 | false, false)) | |||
45675 | return SDValue(); | |||
45676 | ||||
45677 | for (unsigned i = 0, e = EltBits0.size(); i != e; ++i) { | |||
45678 | // TODO - add UNDEF elts support. | |||
45679 | if (UndefElts0[i] || UndefElts1[i]) | |||
45680 | return SDValue(); | |||
45681 | if (EltBits0[i] != ~EltBits1[i]) | |||
45682 | return SDValue(); | |||
45683 | } | |||
45684 | ||||
45685 | SDLoc DL(N); | |||
45686 | ||||
45687 | if (UseVPTERNLOG) { | |||
45688 | // Emit a VPTERNLOG node directly. | |||
45689 | SDValue A = DAG.getBitcast(VT, N0.getOperand(1)); | |||
45690 | SDValue B = DAG.getBitcast(VT, N0.getOperand(0)); | |||
45691 | SDValue C = DAG.getBitcast(VT, N1.getOperand(0)); | |||
45692 | SDValue Imm = DAG.getTargetConstant(0xCA, DL, MVT::i8); | |||
45693 | return DAG.getNode(X86ISD::VPTERNLOG, DL, VT, A, B, C, Imm); | |||
45694 | } | |||
45695 | ||||
45696 | SDValue X = N->getOperand(0); | |||
45697 | SDValue Y = | |||
45698 | DAG.getNode(X86ISD::ANDNP, DL, VT, DAG.getBitcast(VT, N0.getOperand(1)), | |||
45699 | DAG.getBitcast(VT, N1.getOperand(0))); | |||
45700 | return DAG.getNode(ISD::OR, DL, VT, X, Y); | |||
45701 | } | |||
45702 | ||||
45703 | // Try to match OR(AND(~MASK,X),AND(MASK,Y)) logic pattern. | |||
45704 | static bool matchLogicBlend(SDNode *N, SDValue &X, SDValue &Y, SDValue &Mask) { | |||
45705 | if (N->getOpcode() != ISD::OR) | |||
45706 | return false; | |||
45707 | ||||
45708 | SDValue N0 = N->getOperand(0); | |||
45709 | SDValue N1 = N->getOperand(1); | |||
45710 | ||||
45711 | // Canonicalize AND to LHS. | |||
45712 | if (N1.getOpcode() == ISD::AND) | |||
45713 | std::swap(N0, N1); | |||
45714 | ||||
45715 | // Attempt to match OR(AND(M,Y),ANDNP(M,X)). | |||
45716 | if (N0.getOpcode() != ISD::AND || N1.getOpcode() != X86ISD::ANDNP) | |||
45717 | return false; | |||
45718 | ||||
45719 | Mask = N1.getOperand(0); | |||
45720 | X = N1.getOperand(1); | |||
45721 | ||||
45722 | // Check to see if the mask appeared in both the AND and ANDNP. | |||
45723 | if (N0.getOperand(0) == Mask) | |||
45724 | Y = N0.getOperand(1); | |||
45725 | else if (N0.getOperand(1) == Mask) | |||
45726 | Y = N0.getOperand(0); | |||
45727 | else | |||
45728 | return false; | |||
45729 | ||||
45730 | // TODO: Attempt to match against AND(XOR(-1,M),Y) as well, waiting for | |||
45731 | // ANDNP combine allows other combines to happen that prevent matching. | |||
45732 | return true; | |||
45733 | } | |||
45734 | ||||
45735 | // Try to fold: | |||
45736 | // (or (and (m, y), (pandn m, x))) | |||
45737 | // into: | |||
45738 | // (vselect m, x, y) | |||
45739 | // As a special case, try to fold: | |||
45740 | // (or (and (m, (sub 0, x)), (pandn m, x))) | |||
45741 | // into: | |||
45742 | // (sub (xor X, M), M) | |||
45743 | static SDValue combineLogicBlendIntoPBLENDV(SDNode *N, SelectionDAG &DAG, | |||
45744 | const X86Subtarget &Subtarget) { | |||
45745 | assert(N->getOpcode() == ISD::OR && "Unexpected Opcode")(static_cast <bool> (N->getOpcode() == ISD::OR && "Unexpected Opcode") ? void (0) : __assert_fail ("N->getOpcode() == ISD::OR && \"Unexpected Opcode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 45745, __extension__ __PRETTY_FUNCTION__)); | |||
45746 | ||||
45747 | EVT VT = N->getValueType(0); | |||
45748 | if (!((VT.is128BitVector() && Subtarget.hasSSE2()) || | |||
45749 | (VT.is256BitVector() && Subtarget.hasInt256()))) | |||
45750 | return SDValue(); | |||
45751 | ||||
45752 | SDValue X, Y, Mask; | |||
45753 | if (!matchLogicBlend(N, X, Y, Mask)) | |||
45754 | return SDValue(); | |||
45755 | ||||
45756 | // Validate that X, Y, and Mask are bitcasts, and see through them. | |||
45757 | Mask = peekThroughBitcasts(Mask); | |||
45758 | X = peekThroughBitcasts(X); | |||
45759 | Y = peekThroughBitcasts(Y); | |||
45760 | ||||
45761 | EVT MaskVT = Mask.getValueType(); | |||
45762 | unsigned EltBits = MaskVT.getScalarSizeInBits(); | |||
45763 | ||||
45764 | // TODO: Attempt to handle floating point cases as well? | |||
45765 | if (!MaskVT.isInteger() || DAG.ComputeNumSignBits(Mask) != EltBits) | |||
45766 | return SDValue(); | |||
45767 | ||||
45768 | SDLoc DL(N); | |||
45769 | ||||
45770 | // Attempt to combine to conditional negate: (sub (xor X, M), M) | |||
45771 | if (SDValue Res = combineLogicBlendIntoConditionalNegate(VT, Mask, X, Y, DL, | |||
45772 | DAG, Subtarget)) | |||
45773 | return Res; | |||
45774 | ||||
45775 | // PBLENDVB is only available on SSE 4.1. | |||
45776 | if (!Subtarget.hasSSE41()) | |||
45777 | return SDValue(); | |||
45778 | ||||
45779 | // If we have VPTERNLOG we should prefer that since PBLENDVB is multiple uops. | |||
45780 | if (Subtarget.hasVLX()) | |||
45781 | return SDValue(); | |||
45782 | ||||
45783 | MVT BlendVT = VT.is256BitVector() ? MVT::v32i8 : MVT::v16i8; | |||
45784 | ||||
45785 | X = DAG.getBitcast(BlendVT, X); | |||
45786 | Y = DAG.getBitcast(BlendVT, Y); | |||
45787 | Mask = DAG.getBitcast(BlendVT, Mask); | |||
45788 | Mask = DAG.getSelect(DL, BlendVT, Mask, Y, X); | |||
45789 | return DAG.getBitcast(VT, Mask); | |||
45790 | } | |||
45791 | ||||
45792 | // Helper function for combineOrCmpEqZeroToCtlzSrl | |||
45793 | // Transforms: | |||
45794 | // seteq(cmp x, 0) | |||
45795 | // into: | |||
45796 | // srl(ctlz x), log2(bitsize(x)) | |||
45797 | // Input pattern is checked by caller. | |||
45798 | static SDValue lowerX86CmpEqZeroToCtlzSrl(SDValue Op, EVT ExtTy, | |||
45799 | SelectionDAG &DAG) { | |||
45800 | SDValue Cmp = Op.getOperand(1); | |||
45801 | EVT VT = Cmp.getOperand(0).getValueType(); | |||
45802 | unsigned Log2b = Log2_32(VT.getSizeInBits()); | |||
45803 | SDLoc dl(Op); | |||
45804 | SDValue Clz = DAG.getNode(ISD::CTLZ, dl, VT, Cmp->getOperand(0)); | |||
45805 | // The result of the shift is true or false, and on X86, the 32-bit | |||
45806 | // encoding of shr and lzcnt is more desirable. | |||
45807 | SDValue Trunc = DAG.getZExtOrTrunc(Clz, dl, MVT::i32); | |||
45808 | SDValue Scc = DAG.getNode(ISD::SRL, dl, MVT::i32, Trunc, | |||
45809 | DAG.getConstant(Log2b, dl, MVT::i8)); | |||
45810 | return DAG.getZExtOrTrunc(Scc, dl, ExtTy); | |||
45811 | } | |||
45812 | ||||
45813 | // Try to transform: | |||
45814 | // zext(or(setcc(eq, (cmp x, 0)), setcc(eq, (cmp y, 0)))) | |||
45815 | // into: | |||
45816 | // srl(or(ctlz(x), ctlz(y)), log2(bitsize(x)) | |||
45817 | // Will also attempt to match more generic cases, eg: | |||
45818 | // zext(or(or(setcc(eq, cmp 0), setcc(eq, cmp 0)), setcc(eq, cmp 0))) | |||
45819 | // Only applies if the target supports the FastLZCNT feature. | |||
45820 | static SDValue combineOrCmpEqZeroToCtlzSrl(SDNode *N, SelectionDAG &DAG, | |||
45821 | TargetLowering::DAGCombinerInfo &DCI, | |||
45822 | const X86Subtarget &Subtarget) { | |||
45823 | if (DCI.isBeforeLegalize() || !Subtarget.getTargetLowering()->isCtlzFast()) | |||
45824 | return SDValue(); | |||
45825 | ||||
45826 | auto isORCandidate = [](SDValue N) { | |||
45827 | return (N->getOpcode() == ISD::OR && N->hasOneUse()); | |||
45828 | }; | |||
45829 | ||||
45830 | // Check the zero extend is extending to 32-bit or more. The code generated by | |||
45831 | // srl(ctlz) for 16-bit or less variants of the pattern would require extra | |||
45832 | // instructions to clear the upper bits. | |||
45833 | if (!N->hasOneUse() || !N->getSimpleValueType(0).bitsGE(MVT::i32) || | |||
45834 | !isORCandidate(N->getOperand(0))) | |||
45835 | return SDValue(); | |||
45836 | ||||
45837 | // Check the node matches: setcc(eq, cmp 0) | |||
45838 | auto isSetCCCandidate = [](SDValue N) { | |||
45839 | return N->getOpcode() == X86ISD::SETCC && N->hasOneUse() && | |||
45840 | X86::CondCode(N->getConstantOperandVal(0)) == X86::COND_E && | |||
45841 | N->getOperand(1).getOpcode() == X86ISD::CMP && | |||
45842 | isNullConstant(N->getOperand(1).getOperand(1)) && | |||
45843 | N->getOperand(1).getValueType().bitsGE(MVT::i32); | |||
45844 | }; | |||
45845 | ||||
45846 | SDNode *OR = N->getOperand(0).getNode(); | |||
45847 | SDValue LHS = OR->getOperand(0); | |||
45848 | SDValue RHS = OR->getOperand(1); | |||
45849 | ||||
45850 | // Save nodes matching or(or, setcc(eq, cmp 0)). | |||
45851 | SmallVector<SDNode *, 2> ORNodes; | |||
45852 | while (((isORCandidate(LHS) && isSetCCCandidate(RHS)) || | |||
45853 | (isORCandidate(RHS) && isSetCCCandidate(LHS)))) { | |||
45854 | ORNodes.push_back(OR); | |||
45855 | OR = (LHS->getOpcode() == ISD::OR) ? LHS.getNode() : RHS.getNode(); | |||
45856 | LHS = OR->getOperand(0); | |||
45857 | RHS = OR->getOperand(1); | |||
45858 | } | |||
45859 | ||||
45860 | // The last OR node should match or(setcc(eq, cmp 0), setcc(eq, cmp 0)). | |||
45861 | if (!(isSetCCCandidate(LHS) && isSetCCCandidate(RHS)) || | |||
45862 | !isORCandidate(SDValue(OR, 0))) | |||
45863 | return SDValue(); | |||
45864 | ||||
45865 | // We have a or(setcc(eq, cmp 0), setcc(eq, cmp 0)) pattern, try to lower it | |||
45866 | // to | |||
45867 | // or(srl(ctlz),srl(ctlz)). | |||
45868 | // The dag combiner can then fold it into: | |||
45869 | // srl(or(ctlz, ctlz)). | |||
45870 | EVT VT = OR->getValueType(0); | |||
45871 | SDValue NewLHS = lowerX86CmpEqZeroToCtlzSrl(LHS, VT, DAG); | |||
45872 | SDValue Ret, NewRHS; | |||
45873 | if (NewLHS && (NewRHS = lowerX86CmpEqZeroToCtlzSrl(RHS, VT, DAG))) | |||
45874 | Ret = DAG.getNode(ISD::OR, SDLoc(OR), VT, NewLHS, NewRHS); | |||
45875 | ||||
45876 | if (!Ret) | |||
45877 | return SDValue(); | |||
45878 | ||||
45879 | // Try to lower nodes matching the or(or, setcc(eq, cmp 0)) pattern. | |||
45880 | while (ORNodes.size() > 0) { | |||
45881 | OR = ORNodes.pop_back_val(); | |||
45882 | LHS = OR->getOperand(0); | |||
45883 | RHS = OR->getOperand(1); | |||
45884 | // Swap rhs with lhs to match or(setcc(eq, cmp, 0), or). | |||
45885 | if (RHS->getOpcode() == ISD::OR) | |||
45886 | std::swap(LHS, RHS); | |||
45887 | NewRHS = lowerX86CmpEqZeroToCtlzSrl(RHS, VT, DAG); | |||
45888 | if (!NewRHS) | |||
45889 | return SDValue(); | |||
45890 | Ret = DAG.getNode(ISD::OR, SDLoc(OR), VT, Ret, NewRHS); | |||
45891 | } | |||
45892 | ||||
45893 | if (Ret) | |||
45894 | Ret = DAG.getNode(ISD::ZERO_EXTEND, SDLoc(N), N->getValueType(0), Ret); | |||
45895 | ||||
45896 | return Ret; | |||
45897 | } | |||
45898 | ||||
45899 | static SDValue combineOr(SDNode *N, SelectionDAG &DAG, | |||
45900 | TargetLowering::DAGCombinerInfo &DCI, | |||
45901 | const X86Subtarget &Subtarget) { | |||
45902 | SDValue N0 = N->getOperand(0); | |||
45903 | SDValue N1 = N->getOperand(1); | |||
45904 | EVT VT = N->getValueType(0); | |||
45905 | ||||
45906 | // If this is SSE1 only convert to FOR to avoid scalarization. | |||
45907 | if (Subtarget.hasSSE1() && !Subtarget.hasSSE2() && VT == MVT::v4i32) { | |||
45908 | return DAG.getBitcast(MVT::v4i32, | |||
45909 | DAG.getNode(X86ISD::FOR, SDLoc(N), MVT::v4f32, | |||
45910 | DAG.getBitcast(MVT::v4f32, N0), | |||
45911 | DAG.getBitcast(MVT::v4f32, N1))); | |||
45912 | } | |||
45913 | ||||
45914 | // Match any-of bool scalar reductions into a bitcast/movmsk + cmp. | |||
45915 | // TODO: Support multiple SrcOps. | |||
45916 | if (VT == MVT::i1) { | |||
45917 | SmallVector<SDValue, 2> SrcOps; | |||
45918 | SmallVector<APInt, 2> SrcPartials; | |||
45919 | if (matchScalarReduction(SDValue(N, 0), ISD::OR, SrcOps, &SrcPartials) && | |||
45920 | SrcOps.size() == 1) { | |||
45921 | SDLoc dl(N); | |||
45922 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
45923 | unsigned NumElts = SrcOps[0].getValueType().getVectorNumElements(); | |||
45924 | EVT MaskVT = EVT::getIntegerVT(*DAG.getContext(), NumElts); | |||
45925 | SDValue Mask = combineBitcastvxi1(DAG, MaskVT, SrcOps[0], dl, Subtarget); | |||
45926 | if (!Mask && TLI.isTypeLegal(SrcOps[0].getValueType())) | |||
45927 | Mask = DAG.getBitcast(MaskVT, SrcOps[0]); | |||
45928 | if (Mask) { | |||
45929 | assert(SrcPartials[0].getBitWidth() == NumElts &&(static_cast <bool> (SrcPartials[0].getBitWidth() == NumElts && "Unexpected partial reduction mask") ? void (0) : __assert_fail ("SrcPartials[0].getBitWidth() == NumElts && \"Unexpected partial reduction mask\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 45930, __extension__ __PRETTY_FUNCTION__)) | |||
45930 | "Unexpected partial reduction mask")(static_cast <bool> (SrcPartials[0].getBitWidth() == NumElts && "Unexpected partial reduction mask") ? void (0) : __assert_fail ("SrcPartials[0].getBitWidth() == NumElts && \"Unexpected partial reduction mask\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 45930, __extension__ __PRETTY_FUNCTION__)); | |||
45931 | SDValue ZeroBits = DAG.getConstant(0, dl, MaskVT); | |||
45932 | SDValue PartialBits = DAG.getConstant(SrcPartials[0], dl, MaskVT); | |||
45933 | Mask = DAG.getNode(ISD::AND, dl, MaskVT, Mask, PartialBits); | |||
45934 | return DAG.getSetCC(dl, MVT::i1, Mask, ZeroBits, ISD::SETNE); | |||
45935 | } | |||
45936 | } | |||
45937 | } | |||
45938 | ||||
45939 | if (SDValue R = combineBitOpWithMOVMSK(N, DAG)) | |||
45940 | return R; | |||
45941 | ||||
45942 | if (DCI.isBeforeLegalizeOps()) | |||
45943 | return SDValue(); | |||
45944 | ||||
45945 | if (SDValue R = combineCompareEqual(N, DAG, DCI, Subtarget)) | |||
45946 | return R; | |||
45947 | ||||
45948 | if (SDValue FPLogic = convertIntLogicToFPLogic(N, DAG, Subtarget)) | |||
45949 | return FPLogic; | |||
45950 | ||||
45951 | if (SDValue R = canonicalizeBitSelect(N, DAG, Subtarget)) | |||
45952 | return R; | |||
45953 | ||||
45954 | if (SDValue R = combineLogicBlendIntoPBLENDV(N, DAG, Subtarget)) | |||
45955 | return R; | |||
45956 | ||||
45957 | // Combine OR(X,KSHIFTL(Y,Elts/2)) -> CONCAT_VECTORS(X,Y) == KUNPCK(X,Y). | |||
45958 | // Combine OR(KSHIFTL(X,Elts/2),Y) -> CONCAT_VECTORS(Y,X) == KUNPCK(Y,X). | |||
45959 | // iff the upper elements of the non-shifted arg are zero. | |||
45960 | // KUNPCK require 16+ bool vector elements. | |||
45961 | if (N0.getOpcode() == X86ISD::KSHIFTL || N1.getOpcode() == X86ISD::KSHIFTL) { | |||
45962 | unsigned NumElts = VT.getVectorNumElements(); | |||
45963 | unsigned HalfElts = NumElts / 2; | |||
45964 | APInt UpperElts = APInt::getHighBitsSet(NumElts, HalfElts); | |||
45965 | if (NumElts >= 16 && N1.getOpcode() == X86ISD::KSHIFTL && | |||
45966 | N1.getConstantOperandAPInt(1) == HalfElts && | |||
45967 | DAG.MaskedValueIsZero(N0, APInt(1, 1), UpperElts)) { | |||
45968 | SDLoc dl(N); | |||
45969 | return DAG.getNode( | |||
45970 | ISD::CONCAT_VECTORS, dl, VT, | |||
45971 | extractSubVector(N0, 0, DAG, dl, HalfElts), | |||
45972 | extractSubVector(N1.getOperand(0), 0, DAG, dl, HalfElts)); | |||
45973 | } | |||
45974 | if (NumElts >= 16 && N0.getOpcode() == X86ISD::KSHIFTL && | |||
45975 | N0.getConstantOperandAPInt(1) == HalfElts && | |||
45976 | DAG.MaskedValueIsZero(N1, APInt(1, 1), UpperElts)) { | |||
45977 | SDLoc dl(N); | |||
45978 | return DAG.getNode( | |||
45979 | ISD::CONCAT_VECTORS, dl, VT, | |||
45980 | extractSubVector(N1, 0, DAG, dl, HalfElts), | |||
45981 | extractSubVector(N0.getOperand(0), 0, DAG, dl, HalfElts)); | |||
45982 | } | |||
45983 | } | |||
45984 | ||||
45985 | // Attempt to recursively combine an OR of shuffles. | |||
45986 | if (VT.isVector() && (VT.getScalarSizeInBits() % 8) == 0) { | |||
45987 | SDValue Op(N, 0); | |||
45988 | if (SDValue Res = combineX86ShufflesRecursively(Op, DAG, Subtarget)) | |||
45989 | return Res; | |||
45990 | } | |||
45991 | ||||
45992 | return SDValue(); | |||
45993 | } | |||
45994 | ||||
45995 | /// Try to turn tests against the signbit in the form of: | |||
45996 | /// XOR(TRUNCATE(SRL(X, size(X)-1)), 1) | |||
45997 | /// into: | |||
45998 | /// SETGT(X, -1) | |||
45999 | static SDValue foldXorTruncShiftIntoCmp(SDNode *N, SelectionDAG &DAG) { | |||
46000 | // This is only worth doing if the output type is i8 or i1. | |||
46001 | EVT ResultType = N->getValueType(0); | |||
46002 | if (ResultType != MVT::i8 && ResultType != MVT::i1) | |||
46003 | return SDValue(); | |||
46004 | ||||
46005 | SDValue N0 = N->getOperand(0); | |||
46006 | SDValue N1 = N->getOperand(1); | |||
46007 | ||||
46008 | // We should be performing an xor against a truncated shift. | |||
46009 | if (N0.getOpcode() != ISD::TRUNCATE || !N0.hasOneUse()) | |||
46010 | return SDValue(); | |||
46011 | ||||
46012 | // Make sure we are performing an xor against one. | |||
46013 | if (!isOneConstant(N1)) | |||
46014 | return SDValue(); | |||
46015 | ||||
46016 | // SetCC on x86 zero extends so only act on this if it's a logical shift. | |||
46017 | SDValue Shift = N0.getOperand(0); | |||
46018 | if (Shift.getOpcode() != ISD::SRL || !Shift.hasOneUse()) | |||
46019 | return SDValue(); | |||
46020 | ||||
46021 | // Make sure we are truncating from one of i16, i32 or i64. | |||
46022 | EVT ShiftTy = Shift.getValueType(); | |||
46023 | if (ShiftTy != MVT::i16 && ShiftTy != MVT::i32 && ShiftTy != MVT::i64) | |||
46024 | return SDValue(); | |||
46025 | ||||
46026 | // Make sure the shift amount extracts the sign bit. | |||
46027 | if (!isa<ConstantSDNode>(Shift.getOperand(1)) || | |||
46028 | Shift.getConstantOperandAPInt(1) != (ShiftTy.getSizeInBits() - 1)) | |||
46029 | return SDValue(); | |||
46030 | ||||
46031 | // Create a greater-than comparison against -1. | |||
46032 | // N.B. Using SETGE against 0 works but we want a canonical looking | |||
46033 | // comparison, using SETGT matches up with what TranslateX86CC. | |||
46034 | SDLoc DL(N); | |||
46035 | SDValue ShiftOp = Shift.getOperand(0); | |||
46036 | EVT ShiftOpTy = ShiftOp.getValueType(); | |||
46037 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
46038 | EVT SetCCResultType = TLI.getSetCCResultType(DAG.getDataLayout(), | |||
46039 | *DAG.getContext(), ResultType); | |||
46040 | SDValue Cond = DAG.getSetCC(DL, SetCCResultType, ShiftOp, | |||
46041 | DAG.getConstant(-1, DL, ShiftOpTy), ISD::SETGT); | |||
46042 | if (SetCCResultType != ResultType) | |||
46043 | Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, ResultType, Cond); | |||
46044 | return Cond; | |||
46045 | } | |||
46046 | ||||
46047 | /// Turn vector tests of the signbit in the form of: | |||
46048 | /// xor (sra X, elt_size(X)-1), -1 | |||
46049 | /// into: | |||
46050 | /// pcmpgt X, -1 | |||
46051 | /// | |||
46052 | /// This should be called before type legalization because the pattern may not | |||
46053 | /// persist after that. | |||
46054 | static SDValue foldVectorXorShiftIntoCmp(SDNode *N, SelectionDAG &DAG, | |||
46055 | const X86Subtarget &Subtarget) { | |||
46056 | EVT VT = N->getValueType(0); | |||
46057 | if (!VT.isSimple()) | |||
46058 | return SDValue(); | |||
46059 | ||||
46060 | switch (VT.getSimpleVT().SimpleTy) { | |||
46061 | default: return SDValue(); | |||
46062 | case MVT::v16i8: | |||
46063 | case MVT::v8i16: | |||
46064 | case MVT::v4i32: | |||
46065 | case MVT::v2i64: if (!Subtarget.hasSSE2()) return SDValue(); break; | |||
46066 | case MVT::v32i8: | |||
46067 | case MVT::v16i16: | |||
46068 | case MVT::v8i32: | |||
46069 | case MVT::v4i64: if (!Subtarget.hasAVX2()) return SDValue(); break; | |||
46070 | } | |||
46071 | ||||
46072 | // There must be a shift right algebraic before the xor, and the xor must be a | |||
46073 | // 'not' operation. | |||
46074 | SDValue Shift = N->getOperand(0); | |||
46075 | SDValue Ones = N->getOperand(1); | |||
46076 | if (Shift.getOpcode() != ISD::SRA || !Shift.hasOneUse() || | |||
46077 | !ISD::isBuildVectorAllOnes(Ones.getNode())) | |||
46078 | return SDValue(); | |||
46079 | ||||
46080 | // The shift should be smearing the sign bit across each vector element. | |||
46081 | auto *ShiftAmt = | |||
46082 | isConstOrConstSplat(Shift.getOperand(1), /*AllowUndefs*/ true); | |||
46083 | if (!ShiftAmt || | |||
46084 | ShiftAmt->getAPIntValue() != (Shift.getScalarValueSizeInBits() - 1)) | |||
46085 | return SDValue(); | |||
46086 | ||||
46087 | // Create a greater-than comparison against -1. We don't use the more obvious | |||
46088 | // greater-than-or-equal-to-zero because SSE/AVX don't have that instruction. | |||
46089 | return DAG.getSetCC(SDLoc(N), VT, Shift.getOperand(0), Ones, ISD::SETGT); | |||
46090 | } | |||
46091 | ||||
46092 | /// Detect patterns of truncation with unsigned saturation: | |||
46093 | /// | |||
46094 | /// 1. (truncate (umin (x, unsigned_max_of_dest_type)) to dest_type). | |||
46095 | /// Return the source value x to be truncated or SDValue() if the pattern was | |||
46096 | /// not matched. | |||
46097 | /// | |||
46098 | /// 2. (truncate (smin (smax (x, C1), C2)) to dest_type), | |||
46099 | /// where C1 >= 0 and C2 is unsigned max of destination type. | |||
46100 | /// | |||
46101 | /// (truncate (smax (smin (x, C2), C1)) to dest_type) | |||
46102 | /// where C1 >= 0, C2 is unsigned max of destination type and C1 <= C2. | |||
46103 | /// | |||
46104 | /// These two patterns are equivalent to: | |||
46105 | /// (truncate (umin (smax(x, C1), unsigned_max_of_dest_type)) to dest_type) | |||
46106 | /// So return the smax(x, C1) value to be truncated or SDValue() if the | |||
46107 | /// pattern was not matched. | |||
46108 | static SDValue detectUSatPattern(SDValue In, EVT VT, SelectionDAG &DAG, | |||
46109 | const SDLoc &DL) { | |||
46110 | EVT InVT = In.getValueType(); | |||
46111 | ||||
46112 | // Saturation with truncation. We truncate from InVT to VT. | |||
46113 | assert(InVT.getScalarSizeInBits() > VT.getScalarSizeInBits() &&(static_cast <bool> (InVT.getScalarSizeInBits() > VT .getScalarSizeInBits() && "Unexpected types for truncate operation" ) ? void (0) : __assert_fail ("InVT.getScalarSizeInBits() > VT.getScalarSizeInBits() && \"Unexpected types for truncate operation\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 46114, __extension__ __PRETTY_FUNCTION__)) | |||
46114 | "Unexpected types for truncate operation")(static_cast <bool> (InVT.getScalarSizeInBits() > VT .getScalarSizeInBits() && "Unexpected types for truncate operation" ) ? void (0) : __assert_fail ("InVT.getScalarSizeInBits() > VT.getScalarSizeInBits() && \"Unexpected types for truncate operation\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 46114, __extension__ __PRETTY_FUNCTION__)); | |||
46115 | ||||
46116 | // Match min/max and return limit value as a parameter. | |||
46117 | auto MatchMinMax = [](SDValue V, unsigned Opcode, APInt &Limit) -> SDValue { | |||
46118 | if (V.getOpcode() == Opcode && | |||
46119 | ISD::isConstantSplatVector(V.getOperand(1).getNode(), Limit)) | |||
46120 | return V.getOperand(0); | |||
46121 | return SDValue(); | |||
46122 | }; | |||
46123 | ||||
46124 | APInt C1, C2; | |||
46125 | if (SDValue UMin = MatchMinMax(In, ISD::UMIN, C2)) | |||
46126 | // C2 should be equal to UINT32_MAX / UINT16_MAX / UINT8_MAX according | |||
46127 | // the element size of the destination type. | |||
46128 | if (C2.isMask(VT.getScalarSizeInBits())) | |||
46129 | return UMin; | |||
46130 | ||||
46131 | if (SDValue SMin = MatchMinMax(In, ISD::SMIN, C2)) | |||
46132 | if (MatchMinMax(SMin, ISD::SMAX, C1)) | |||
46133 | if (C1.isNonNegative() && C2.isMask(VT.getScalarSizeInBits())) | |||
46134 | return SMin; | |||
46135 | ||||
46136 | if (SDValue SMax = MatchMinMax(In, ISD::SMAX, C1)) | |||
46137 | if (SDValue SMin = MatchMinMax(SMax, ISD::SMIN, C2)) | |||
46138 | if (C1.isNonNegative() && C2.isMask(VT.getScalarSizeInBits()) && | |||
46139 | C2.uge(C1)) { | |||
46140 | return DAG.getNode(ISD::SMAX, DL, InVT, SMin, In.getOperand(1)); | |||
46141 | } | |||
46142 | ||||
46143 | return SDValue(); | |||
46144 | } | |||
46145 | ||||
46146 | /// Detect patterns of truncation with signed saturation: | |||
46147 | /// (truncate (smin ((smax (x, signed_min_of_dest_type)), | |||
46148 | /// signed_max_of_dest_type)) to dest_type) | |||
46149 | /// or: | |||
46150 | /// (truncate (smax ((smin (x, signed_max_of_dest_type)), | |||
46151 | /// signed_min_of_dest_type)) to dest_type). | |||
46152 | /// With MatchPackUS, the smax/smin range is [0, unsigned_max_of_dest_type]. | |||
46153 | /// Return the source value to be truncated or SDValue() if the pattern was not | |||
46154 | /// matched. | |||
46155 | static SDValue detectSSatPattern(SDValue In, EVT VT, bool MatchPackUS = false) { | |||
46156 | unsigned NumDstBits = VT.getScalarSizeInBits(); | |||
46157 | unsigned NumSrcBits = In.getScalarValueSizeInBits(); | |||
46158 | assert(NumSrcBits > NumDstBits && "Unexpected types for truncate operation")(static_cast <bool> (NumSrcBits > NumDstBits && "Unexpected types for truncate operation") ? void (0) : __assert_fail ("NumSrcBits > NumDstBits && \"Unexpected types for truncate operation\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 46158, __extension__ __PRETTY_FUNCTION__)); | |||
46159 | ||||
46160 | auto MatchMinMax = [](SDValue V, unsigned Opcode, | |||
46161 | const APInt &Limit) -> SDValue { | |||
46162 | APInt C; | |||
46163 | if (V.getOpcode() == Opcode && | |||
46164 | ISD::isConstantSplatVector(V.getOperand(1).getNode(), C) && C == Limit) | |||
46165 | return V.getOperand(0); | |||
46166 | return SDValue(); | |||
46167 | }; | |||
46168 | ||||
46169 | APInt SignedMax, SignedMin; | |||
46170 | if (MatchPackUS) { | |||
46171 | SignedMax = APInt::getAllOnesValue(NumDstBits).zext(NumSrcBits); | |||
46172 | SignedMin = APInt(NumSrcBits, 0); | |||
46173 | } else { | |||
46174 | SignedMax = APInt::getSignedMaxValue(NumDstBits).sext(NumSrcBits); | |||
46175 | SignedMin = APInt::getSignedMinValue(NumDstBits).sext(NumSrcBits); | |||
46176 | } | |||
46177 | ||||
46178 | if (SDValue SMin = MatchMinMax(In, ISD::SMIN, SignedMax)) | |||
46179 | if (SDValue SMax = MatchMinMax(SMin, ISD::SMAX, SignedMin)) | |||
46180 | return SMax; | |||
46181 | ||||
46182 | if (SDValue SMax = MatchMinMax(In, ISD::SMAX, SignedMin)) | |||
46183 | if (SDValue SMin = MatchMinMax(SMax, ISD::SMIN, SignedMax)) | |||
46184 | return SMin; | |||
46185 | ||||
46186 | return SDValue(); | |||
46187 | } | |||
46188 | ||||
46189 | static SDValue combineTruncateWithSat(SDValue In, EVT VT, const SDLoc &DL, | |||
46190 | SelectionDAG &DAG, | |||
46191 | const X86Subtarget &Subtarget) { | |||
46192 | if (!Subtarget.hasSSE2() || !VT.isVector()) | |||
46193 | return SDValue(); | |||
46194 | ||||
46195 | EVT SVT = VT.getVectorElementType(); | |||
46196 | EVT InVT = In.getValueType(); | |||
46197 | EVT InSVT = InVT.getVectorElementType(); | |||
46198 | ||||
46199 | // If we're clamping a signed 32-bit vector to 0-255 and the 32-bit vector is | |||
46200 | // split across two registers. We can use a packusdw+perm to clamp to 0-65535 | |||
46201 | // and concatenate at the same time. Then we can use a final vpmovuswb to | |||
46202 | // clip to 0-255. | |||
46203 | if (Subtarget.hasBWI() && !Subtarget.useAVX512Regs() && | |||
46204 | InVT == MVT::v16i32 && VT == MVT::v16i8) { | |||
46205 | if (auto USatVal = detectSSatPattern(In, VT, true)) { | |||
46206 | // Emit a VPACKUSDW+VPERMQ followed by a VPMOVUSWB. | |||
46207 | SDValue Mid = truncateVectorWithPACK(X86ISD::PACKUS, MVT::v16i16, USatVal, | |||
46208 | DL, DAG, Subtarget); | |||
46209 | assert(Mid && "Failed to pack!")(static_cast <bool> (Mid && "Failed to pack!") ? void (0) : __assert_fail ("Mid && \"Failed to pack!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 46209, __extension__ __PRETTY_FUNCTION__)); | |||
46210 | return DAG.getNode(X86ISD::VTRUNCUS, DL, VT, Mid); | |||
46211 | } | |||
46212 | } | |||
46213 | ||||
46214 | // vXi32 truncate instructions are available with AVX512F. | |||
46215 | // vXi16 truncate instructions are only available with AVX512BW. | |||
46216 | // For 256-bit or smaller vectors, we require VLX. | |||
46217 | // FIXME: We could widen truncates to 512 to remove the VLX restriction. | |||
46218 | // If the result type is 256-bits or larger and we have disable 512-bit | |||
46219 | // registers, we should go ahead and use the pack instructions if possible. | |||
46220 | bool PreferAVX512 = ((Subtarget.hasAVX512() && InSVT == MVT::i32) || | |||
46221 | (Subtarget.hasBWI() && InSVT == MVT::i16)) && | |||
46222 | (InVT.getSizeInBits() > 128) && | |||
46223 | (Subtarget.hasVLX() || InVT.getSizeInBits() > 256) && | |||
46224 | !(!Subtarget.useAVX512Regs() && VT.getSizeInBits() >= 256); | |||
46225 | ||||
46226 | if (isPowerOf2_32(VT.getVectorNumElements()) && !PreferAVX512 && | |||
46227 | VT.getSizeInBits() >= 64 && | |||
46228 | (SVT == MVT::i8 || SVT == MVT::i16) && | |||
46229 | (InSVT == MVT::i16 || InSVT == MVT::i32)) { | |||
46230 | if (auto USatVal = detectSSatPattern(In, VT, true)) { | |||
46231 | // vXi32 -> vXi8 must be performed as PACKUSWB(PACKSSDW,PACKSSDW). | |||
46232 | // Only do this when the result is at least 64 bits or we'll leaving | |||
46233 | // dangling PACKSSDW nodes. | |||
46234 | if (SVT == MVT::i8 && InSVT == MVT::i32) { | |||
46235 | EVT MidVT = VT.changeVectorElementType(MVT::i16); | |||
46236 | SDValue Mid = truncateVectorWithPACK(X86ISD::PACKSS, MidVT, USatVal, DL, | |||
46237 | DAG, Subtarget); | |||
46238 | assert(Mid && "Failed to pack!")(static_cast <bool> (Mid && "Failed to pack!") ? void (0) : __assert_fail ("Mid && \"Failed to pack!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 46238, __extension__ __PRETTY_FUNCTION__)); | |||
46239 | SDValue V = truncateVectorWithPACK(X86ISD::PACKUS, VT, Mid, DL, DAG, | |||
46240 | Subtarget); | |||
46241 | assert(V && "Failed to pack!")(static_cast <bool> (V && "Failed to pack!") ? void (0) : __assert_fail ("V && \"Failed to pack!\"", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 46241, __extension__ __PRETTY_FUNCTION__)); | |||
46242 | return V; | |||
46243 | } else if (SVT == MVT::i8 || Subtarget.hasSSE41()) | |||
46244 | return truncateVectorWithPACK(X86ISD::PACKUS, VT, USatVal, DL, DAG, | |||
46245 | Subtarget); | |||
46246 | } | |||
46247 | if (auto SSatVal = detectSSatPattern(In, VT)) | |||
46248 | return truncateVectorWithPACK(X86ISD::PACKSS, VT, SSatVal, DL, DAG, | |||
46249 | Subtarget); | |||
46250 | } | |||
46251 | ||||
46252 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
46253 | if (TLI.isTypeLegal(InVT) && InVT.isVector() && SVT != MVT::i1 && | |||
46254 | Subtarget.hasAVX512() && (InSVT != MVT::i16 || Subtarget.hasBWI()) && | |||
46255 | (SVT == MVT::i32 || SVT == MVT::i16 || SVT == MVT::i8)) { | |||
46256 | unsigned TruncOpc = 0; | |||
46257 | SDValue SatVal; | |||
46258 | if (auto SSatVal = detectSSatPattern(In, VT)) { | |||
46259 | SatVal = SSatVal; | |||
46260 | TruncOpc = X86ISD::VTRUNCS; | |||
46261 | } else if (auto USatVal = detectUSatPattern(In, VT, DAG, DL)) { | |||
46262 | SatVal = USatVal; | |||
46263 | TruncOpc = X86ISD::VTRUNCUS; | |||
46264 | } | |||
46265 | if (SatVal) { | |||
46266 | unsigned ResElts = VT.getVectorNumElements(); | |||
46267 | // If the input type is less than 512 bits and we don't have VLX, we need | |||
46268 | // to widen to 512 bits. | |||
46269 | if (!Subtarget.hasVLX() && !InVT.is512BitVector()) { | |||
46270 | unsigned NumConcats = 512 / InVT.getSizeInBits(); | |||
46271 | ResElts *= NumConcats; | |||
46272 | SmallVector<SDValue, 4> ConcatOps(NumConcats, DAG.getUNDEF(InVT)); | |||
46273 | ConcatOps[0] = SatVal; | |||
46274 | InVT = EVT::getVectorVT(*DAG.getContext(), InSVT, | |||
46275 | NumConcats * InVT.getVectorNumElements()); | |||
46276 | SatVal = DAG.getNode(ISD::CONCAT_VECTORS, DL, InVT, ConcatOps); | |||
46277 | } | |||
46278 | // Widen the result if its narrower than 128 bits. | |||
46279 | if (ResElts * SVT.getSizeInBits() < 128) | |||
46280 | ResElts = 128 / SVT.getSizeInBits(); | |||
46281 | EVT TruncVT = EVT::getVectorVT(*DAG.getContext(), SVT, ResElts); | |||
46282 | SDValue Res = DAG.getNode(TruncOpc, DL, TruncVT, SatVal); | |||
46283 | return DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, VT, Res, | |||
46284 | DAG.getIntPtrConstant(0, DL)); | |||
46285 | } | |||
46286 | } | |||
46287 | ||||
46288 | return SDValue(); | |||
46289 | } | |||
46290 | ||||
46291 | /// This function detects the AVG pattern between vectors of unsigned i8/i16, | |||
46292 | /// which is c = (a + b + 1) / 2, and replace this operation with the efficient | |||
46293 | /// X86ISD::AVG instruction. | |||
46294 | static SDValue detectAVGPattern(SDValue In, EVT VT, SelectionDAG &DAG, | |||
46295 | const X86Subtarget &Subtarget, | |||
46296 | const SDLoc &DL) { | |||
46297 | if (!VT.isVector()) | |||
46298 | return SDValue(); | |||
46299 | EVT InVT = In.getValueType(); | |||
46300 | unsigned NumElems = VT.getVectorNumElements(); | |||
46301 | ||||
46302 | EVT ScalarVT = VT.getVectorElementType(); | |||
46303 | if (!((ScalarVT == MVT::i8 || ScalarVT == MVT::i16) && NumElems >= 2)) | |||
46304 | return SDValue(); | |||
46305 | ||||
46306 | // InScalarVT is the intermediate type in AVG pattern and it should be greater | |||
46307 | // than the original input type (i8/i16). | |||
46308 | EVT InScalarVT = InVT.getVectorElementType(); | |||
46309 | if (InScalarVT.getFixedSizeInBits() <= ScalarVT.getFixedSizeInBits()) | |||
46310 | return SDValue(); | |||
46311 | ||||
46312 | if (!Subtarget.hasSSE2()) | |||
46313 | return SDValue(); | |||
46314 | ||||
46315 | // Detect the following pattern: | |||
46316 | // | |||
46317 | // %1 = zext <N x i8> %a to <N x i32> | |||
46318 | // %2 = zext <N x i8> %b to <N x i32> | |||
46319 | // %3 = add nuw nsw <N x i32> %1, <i32 1 x N> | |||
46320 | // %4 = add nuw nsw <N x i32> %3, %2 | |||
46321 | // %5 = lshr <N x i32> %N, <i32 1 x N> | |||
46322 | // %6 = trunc <N x i32> %5 to <N x i8> | |||
46323 | // | |||
46324 | // In AVX512, the last instruction can also be a trunc store. | |||
46325 | if (In.getOpcode() != ISD::SRL) | |||
46326 | return SDValue(); | |||
46327 | ||||
46328 | // A lambda checking the given SDValue is a constant vector and each element | |||
46329 | // is in the range [Min, Max]. | |||
46330 | auto IsConstVectorInRange = [](SDValue V, unsigned Min, unsigned Max) { | |||
46331 | return ISD::matchUnaryPredicate(V, [Min, Max](ConstantSDNode *C) { | |||
46332 | return !(C->getAPIntValue().ult(Min) || C->getAPIntValue().ugt(Max)); | |||
46333 | }); | |||
46334 | }; | |||
46335 | ||||
46336 | // Check if each element of the vector is right-shifted by one. | |||
46337 | SDValue LHS = In.getOperand(0); | |||
46338 | SDValue RHS = In.getOperand(1); | |||
46339 | if (!IsConstVectorInRange(RHS, 1, 1)) | |||
46340 | return SDValue(); | |||
46341 | if (LHS.getOpcode() != ISD::ADD) | |||
46342 | return SDValue(); | |||
46343 | ||||
46344 | // Detect a pattern of a + b + 1 where the order doesn't matter. | |||
46345 | SDValue Operands[3]; | |||
46346 | Operands[0] = LHS.getOperand(0); | |||
46347 | Operands[1] = LHS.getOperand(1); | |||
46348 | ||||
46349 | auto AVGBuilder = [](SelectionDAG &DAG, const SDLoc &DL, | |||
46350 | ArrayRef<SDValue> Ops) { | |||
46351 | return DAG.getNode(X86ISD::AVG, DL, Ops[0].getValueType(), Ops); | |||
46352 | }; | |||
46353 | ||||
46354 | auto AVGSplitter = [&](SDValue Op0, SDValue Op1) { | |||
46355 | // Pad to a power-of-2 vector, split+apply and extract the original vector. | |||
46356 | unsigned NumElemsPow2 = PowerOf2Ceil(NumElems); | |||
46357 | EVT Pow2VT = EVT::getVectorVT(*DAG.getContext(), ScalarVT, NumElemsPow2); | |||
46358 | if (NumElemsPow2 != NumElems) { | |||
46359 | SmallVector<SDValue, 32> Ops0(NumElemsPow2, DAG.getUNDEF(ScalarVT)); | |||
46360 | SmallVector<SDValue, 32> Ops1(NumElemsPow2, DAG.getUNDEF(ScalarVT)); | |||
46361 | for (unsigned i = 0; i != NumElems; ++i) { | |||
46362 | SDValue Idx = DAG.getIntPtrConstant(i, DL); | |||
46363 | Ops0[i] = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, ScalarVT, Op0, Idx); | |||
46364 | Ops1[i] = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, ScalarVT, Op1, Idx); | |||
46365 | } | |||
46366 | Op0 = DAG.getBuildVector(Pow2VT, DL, Ops0); | |||
46367 | Op1 = DAG.getBuildVector(Pow2VT, DL, Ops1); | |||
46368 | } | |||
46369 | SDValue Res = | |||
46370 | SplitOpsAndApply(DAG, Subtarget, DL, Pow2VT, {Op0, Op1}, AVGBuilder); | |||
46371 | if (NumElemsPow2 == NumElems) | |||
46372 | return Res; | |||
46373 | return DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, VT, Res, | |||
46374 | DAG.getIntPtrConstant(0, DL)); | |||
46375 | }; | |||
46376 | ||||
46377 | // Take care of the case when one of the operands is a constant vector whose | |||
46378 | // element is in the range [1, 256]. | |||
46379 | if (IsConstVectorInRange(Operands[1], 1, ScalarVT == MVT::i8 ? 256 : 65536) && | |||
46380 | Operands[0].getOpcode() == ISD::ZERO_EXTEND && | |||
46381 | Operands[0].getOperand(0).getValueType() == VT) { | |||
46382 | // The pattern is detected. Subtract one from the constant vector, then | |||
46383 | // demote it and emit X86ISD::AVG instruction. | |||
46384 | SDValue VecOnes = DAG.getConstant(1, DL, InVT); | |||
46385 | Operands[1] = DAG.getNode(ISD::SUB, DL, InVT, Operands[1], VecOnes); | |||
46386 | Operands[1] = DAG.getNode(ISD::TRUNCATE, DL, VT, Operands[1]); | |||
46387 | return AVGSplitter(Operands[0].getOperand(0), Operands[1]); | |||
46388 | } | |||
46389 | ||||
46390 | // Matches 'add like' patterns: add(Op0,Op1) + zext(or(Op0,Op1)). | |||
46391 | // Match the or case only if its 'add-like' - can be replaced by an add. | |||
46392 | auto FindAddLike = [&](SDValue V, SDValue &Op0, SDValue &Op1) { | |||
46393 | if (ISD::ADD == V.getOpcode()) { | |||
46394 | Op0 = V.getOperand(0); | |||
46395 | Op1 = V.getOperand(1); | |||
46396 | return true; | |||
46397 | } | |||
46398 | if (ISD::ZERO_EXTEND != V.getOpcode()) | |||
46399 | return false; | |||
46400 | V = V.getOperand(0); | |||
46401 | if (V.getValueType() != VT || ISD::OR != V.getOpcode() || | |||
46402 | !DAG.haveNoCommonBitsSet(V.getOperand(0), V.getOperand(1))) | |||
46403 | return false; | |||
46404 | Op0 = V.getOperand(0); | |||
46405 | Op1 = V.getOperand(1); | |||
46406 | return true; | |||
46407 | }; | |||
46408 | ||||
46409 | SDValue Op0, Op1; | |||
46410 | if (FindAddLike(Operands[0], Op0, Op1)) | |||
46411 | std::swap(Operands[0], Operands[1]); | |||
46412 | else if (!FindAddLike(Operands[1], Op0, Op1)) | |||
46413 | return SDValue(); | |||
46414 | Operands[2] = Op0; | |||
46415 | Operands[1] = Op1; | |||
46416 | ||||
46417 | // Now we have three operands of two additions. Check that one of them is a | |||
46418 | // constant vector with ones, and the other two can be promoted from i8/i16. | |||
46419 | for (int i = 0; i < 3; ++i) { | |||
46420 | if (!IsConstVectorInRange(Operands[i], 1, 1)) | |||
46421 | continue; | |||
46422 | std::swap(Operands[i], Operands[2]); | |||
46423 | ||||
46424 | // Check if Operands[0] and Operands[1] are results of type promotion. | |||
46425 | for (int j = 0; j < 2; ++j) | |||
46426 | if (Operands[j].getValueType() != VT) { | |||
46427 | if (Operands[j].getOpcode() != ISD::ZERO_EXTEND || | |||
46428 | Operands[j].getOperand(0).getValueType() != VT) | |||
46429 | return SDValue(); | |||
46430 | Operands[j] = Operands[j].getOperand(0); | |||
46431 | } | |||
46432 | ||||
46433 | // The pattern is detected, emit X86ISD::AVG instruction(s). | |||
46434 | return AVGSplitter(Operands[0], Operands[1]); | |||
46435 | } | |||
46436 | ||||
46437 | return SDValue(); | |||
46438 | } | |||
46439 | ||||
46440 | static SDValue combineLoad(SDNode *N, SelectionDAG &DAG, | |||
46441 | TargetLowering::DAGCombinerInfo &DCI, | |||
46442 | const X86Subtarget &Subtarget) { | |||
46443 | LoadSDNode *Ld = cast<LoadSDNode>(N); | |||
46444 | EVT RegVT = Ld->getValueType(0); | |||
46445 | EVT MemVT = Ld->getMemoryVT(); | |||
46446 | SDLoc dl(Ld); | |||
46447 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
46448 | ||||
46449 | // For chips with slow 32-byte unaligned loads, break the 32-byte operation | |||
46450 | // into two 16-byte operations. Also split non-temporal aligned loads on | |||
46451 | // pre-AVX2 targets as 32-byte loads will lower to regular temporal loads. | |||
46452 | ISD::LoadExtType Ext = Ld->getExtensionType(); | |||
46453 | bool Fast; | |||
46454 | if (RegVT.is256BitVector() && !DCI.isBeforeLegalizeOps() && | |||
46455 | Ext == ISD::NON_EXTLOAD && | |||
46456 | ((Ld->isNonTemporal() && !Subtarget.hasInt256() && | |||
46457 | Ld->getAlignment() >= 16) || | |||
46458 | (TLI.allowsMemoryAccess(*DAG.getContext(), DAG.getDataLayout(), RegVT, | |||
46459 | *Ld->getMemOperand(), &Fast) && | |||
46460 | !Fast))) { | |||
46461 | unsigned NumElems = RegVT.getVectorNumElements(); | |||
46462 | if (NumElems < 2) | |||
46463 | return SDValue(); | |||
46464 | ||||
46465 | unsigned HalfOffset = 16; | |||
46466 | SDValue Ptr1 = Ld->getBasePtr(); | |||
46467 | SDValue Ptr2 = | |||
46468 | DAG.getMemBasePlusOffset(Ptr1, TypeSize::Fixed(HalfOffset), dl); | |||
46469 | EVT HalfVT = EVT::getVectorVT(*DAG.getContext(), MemVT.getScalarType(), | |||
46470 | NumElems / 2); | |||
46471 | SDValue Load1 = | |||
46472 | DAG.getLoad(HalfVT, dl, Ld->getChain(), Ptr1, Ld->getPointerInfo(), | |||
46473 | Ld->getOriginalAlign(), | |||
46474 | Ld->getMemOperand()->getFlags()); | |||
46475 | SDValue Load2 = DAG.getLoad(HalfVT, dl, Ld->getChain(), Ptr2, | |||
46476 | Ld->getPointerInfo().getWithOffset(HalfOffset), | |||
46477 | Ld->getOriginalAlign(), | |||
46478 | Ld->getMemOperand()->getFlags()); | |||
46479 | SDValue TF = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, | |||
46480 | Load1.getValue(1), Load2.getValue(1)); | |||
46481 | ||||
46482 | SDValue NewVec = DAG.getNode(ISD::CONCAT_VECTORS, dl, RegVT, Load1, Load2); | |||
46483 | return DCI.CombineTo(N, NewVec, TF, true); | |||
46484 | } | |||
46485 | ||||
46486 | // Bool vector load - attempt to cast to an integer, as we have good | |||
46487 | // (vXiY *ext(vXi1 bitcast(iX))) handling. | |||
46488 | if (Ext == ISD::NON_EXTLOAD && !Subtarget.hasAVX512() && RegVT.isVector() && | |||
46489 | RegVT.getScalarType() == MVT::i1 && DCI.isBeforeLegalize()) { | |||
46490 | unsigned NumElts = RegVT.getVectorNumElements(); | |||
46491 | EVT IntVT = EVT::getIntegerVT(*DAG.getContext(), NumElts); | |||
46492 | if (TLI.isTypeLegal(IntVT)) { | |||
46493 | SDValue IntLoad = DAG.getLoad(IntVT, dl, Ld->getChain(), Ld->getBasePtr(), | |||
46494 | Ld->getPointerInfo(), | |||
46495 | Ld->getOriginalAlign(), | |||
46496 | Ld->getMemOperand()->getFlags()); | |||
46497 | SDValue BoolVec = DAG.getBitcast(RegVT, IntLoad); | |||
46498 | return DCI.CombineTo(N, BoolVec, IntLoad.getValue(1), true); | |||
46499 | } | |||
46500 | } | |||
46501 | ||||
46502 | // If we also broadcast this as a subvector to a wider type, then just extract | |||
46503 | // the lowest subvector. | |||
46504 | if (Ext == ISD::NON_EXTLOAD && Subtarget.hasAVX() && Ld->isSimple() && | |||
46505 | (RegVT.is128BitVector() || RegVT.is256BitVector())) { | |||
46506 | SDValue Ptr = Ld->getBasePtr(); | |||
46507 | SDValue Chain = Ld->getChain(); | |||
46508 | for (SDNode *User : Ptr->uses()) { | |||
46509 | if (User != N && User->getOpcode() == X86ISD::SUBV_BROADCAST_LOAD && | |||
46510 | cast<MemIntrinsicSDNode>(User)->getBasePtr() == Ptr && | |||
46511 | cast<MemIntrinsicSDNode>(User)->getChain() == Chain && | |||
46512 | cast<MemIntrinsicSDNode>(User)->getMemoryVT().getSizeInBits() == | |||
46513 | MemVT.getSizeInBits() && | |||
46514 | !User->hasAnyUseOfValue(1) && | |||
46515 | User->getValueSizeInBits(0).getFixedSize() > | |||
46516 | RegVT.getFixedSizeInBits()) { | |||
46517 | SDValue Extract = extractSubVector(SDValue(User, 0), 0, DAG, SDLoc(N), | |||
46518 | RegVT.getSizeInBits()); | |||
46519 | Extract = DAG.getBitcast(RegVT, Extract); | |||
46520 | return DCI.CombineTo(N, Extract, SDValue(User, 1)); | |||
46521 | } | |||
46522 | } | |||
46523 | } | |||
46524 | ||||
46525 | // Cast ptr32 and ptr64 pointers to the default address space before a load. | |||
46526 | unsigned AddrSpace = Ld->getAddressSpace(); | |||
46527 | if (AddrSpace == X86AS::PTR64 || AddrSpace == X86AS::PTR32_SPTR || | |||
46528 | AddrSpace == X86AS::PTR32_UPTR) { | |||
46529 | MVT PtrVT = TLI.getPointerTy(DAG.getDataLayout()); | |||
46530 | if (PtrVT != Ld->getBasePtr().getSimpleValueType()) { | |||
46531 | SDValue Cast = | |||
46532 | DAG.getAddrSpaceCast(dl, PtrVT, Ld->getBasePtr(), AddrSpace, 0); | |||
46533 | return DAG.getLoad(RegVT, dl, Ld->getChain(), Cast, Ld->getPointerInfo(), | |||
46534 | Ld->getOriginalAlign(), | |||
46535 | Ld->getMemOperand()->getFlags()); | |||
46536 | } | |||
46537 | } | |||
46538 | ||||
46539 | return SDValue(); | |||
46540 | } | |||
46541 | ||||
46542 | /// If V is a build vector of boolean constants and exactly one of those | |||
46543 | /// constants is true, return the operand index of that true element. | |||
46544 | /// Otherwise, return -1. | |||
46545 | static int getOneTrueElt(SDValue V) { | |||
46546 | // This needs to be a build vector of booleans. | |||
46547 | // TODO: Checking for the i1 type matches the IR definition for the mask, | |||
46548 | // but the mask check could be loosened to i8 or other types. That might | |||
46549 | // also require checking more than 'allOnesValue'; eg, the x86 HW | |||
46550 | // instructions only require that the MSB is set for each mask element. | |||
46551 | // The ISD::MSTORE comments/definition do not specify how the mask operand | |||
46552 | // is formatted. | |||
46553 | auto *BV = dyn_cast<BuildVectorSDNode>(V); | |||
46554 | if (!BV || BV->getValueType(0).getVectorElementType() != MVT::i1) | |||
46555 | return -1; | |||
46556 | ||||
46557 | int TrueIndex = -1; | |||
46558 | unsigned NumElts = BV->getValueType(0).getVectorNumElements(); | |||
46559 | for (unsigned i = 0; i < NumElts; ++i) { | |||
46560 | const SDValue &Op = BV->getOperand(i); | |||
46561 | if (Op.isUndef()) | |||
46562 | continue; | |||
46563 | auto *ConstNode = dyn_cast<ConstantSDNode>(Op); | |||
46564 | if (!ConstNode) | |||
46565 | return -1; | |||
46566 | if (ConstNode->getAPIntValue().countTrailingOnes() >= 1) { | |||
46567 | // If we already found a one, this is too many. | |||
46568 | if (TrueIndex >= 0) | |||
46569 | return -1; | |||
46570 | TrueIndex = i; | |||
46571 | } | |||
46572 | } | |||
46573 | return TrueIndex; | |||
46574 | } | |||
46575 | ||||
46576 | /// Given a masked memory load/store operation, return true if it has one mask | |||
46577 | /// bit set. If it has one mask bit set, then also return the memory address of | |||
46578 | /// the scalar element to load/store, the vector index to insert/extract that | |||
46579 | /// scalar element, and the alignment for the scalar memory access. | |||
46580 | static bool getParamsForOneTrueMaskedElt(MaskedLoadStoreSDNode *MaskedOp, | |||
46581 | SelectionDAG &DAG, SDValue &Addr, | |||
46582 | SDValue &Index, Align &Alignment, | |||
46583 | unsigned &Offset) { | |||
46584 | int TrueMaskElt = getOneTrueElt(MaskedOp->getMask()); | |||
46585 | if (TrueMaskElt < 0) | |||
46586 | return false; | |||
46587 | ||||
46588 | // Get the address of the one scalar element that is specified by the mask | |||
46589 | // using the appropriate offset from the base pointer. | |||
46590 | EVT EltVT = MaskedOp->getMemoryVT().getVectorElementType(); | |||
46591 | Offset = 0; | |||
46592 | Addr = MaskedOp->getBasePtr(); | |||
46593 | if (TrueMaskElt != 0) { | |||
46594 | Offset = TrueMaskElt * EltVT.getStoreSize(); | |||
46595 | Addr = DAG.getMemBasePlusOffset(Addr, TypeSize::Fixed(Offset), | |||
46596 | SDLoc(MaskedOp)); | |||
46597 | } | |||
46598 | ||||
46599 | Index = DAG.getIntPtrConstant(TrueMaskElt, SDLoc(MaskedOp)); | |||
46600 | Alignment = commonAlignment(MaskedOp->getOriginalAlign(), | |||
46601 | EltVT.getStoreSize()); | |||
46602 | return true; | |||
46603 | } | |||
46604 | ||||
46605 | /// If exactly one element of the mask is set for a non-extending masked load, | |||
46606 | /// it is a scalar load and vector insert. | |||
46607 | /// Note: It is expected that the degenerate cases of an all-zeros or all-ones | |||
46608 | /// mask have already been optimized in IR, so we don't bother with those here. | |||
46609 | static SDValue | |||
46610 | reduceMaskedLoadToScalarLoad(MaskedLoadSDNode *ML, SelectionDAG &DAG, | |||
46611 | TargetLowering::DAGCombinerInfo &DCI, | |||
46612 | const X86Subtarget &Subtarget) { | |||
46613 | assert(ML->isUnindexed() && "Unexpected indexed masked load!")(static_cast <bool> (ML->isUnindexed() && "Unexpected indexed masked load!" ) ? void (0) : __assert_fail ("ML->isUnindexed() && \"Unexpected indexed masked load!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 46613, __extension__ __PRETTY_FUNCTION__)); | |||
46614 | // TODO: This is not x86-specific, so it could be lifted to DAGCombiner. | |||
46615 | // However, some target hooks may need to be added to know when the transform | |||
46616 | // is profitable. Endianness would also have to be considered. | |||
46617 | ||||
46618 | SDValue Addr, VecIndex; | |||
46619 | Align Alignment; | |||
46620 | unsigned Offset; | |||
46621 | if (!getParamsForOneTrueMaskedElt(ML, DAG, Addr, VecIndex, Alignment, Offset)) | |||
46622 | return SDValue(); | |||
46623 | ||||
46624 | // Load the one scalar element that is specified by the mask using the | |||
46625 | // appropriate offset from the base pointer. | |||
46626 | SDLoc DL(ML); | |||
46627 | EVT VT = ML->getValueType(0); | |||
46628 | EVT EltVT = VT.getVectorElementType(); | |||
46629 | ||||
46630 | EVT CastVT = VT; | |||
46631 | if (EltVT == MVT::i64 && !Subtarget.is64Bit()) { | |||
46632 | EltVT = MVT::f64; | |||
46633 | CastVT = VT.changeVectorElementType(EltVT); | |||
46634 | } | |||
46635 | ||||
46636 | SDValue Load = | |||
46637 | DAG.getLoad(EltVT, DL, ML->getChain(), Addr, | |||
46638 | ML->getPointerInfo().getWithOffset(Offset), | |||
46639 | Alignment, ML->getMemOperand()->getFlags()); | |||
46640 | ||||
46641 | SDValue PassThru = DAG.getBitcast(CastVT, ML->getPassThru()); | |||
46642 | ||||
46643 | // Insert the loaded element into the appropriate place in the vector. | |||
46644 | SDValue Insert = | |||
46645 | DAG.getNode(ISD::INSERT_VECTOR_ELT, DL, CastVT, PassThru, Load, VecIndex); | |||
46646 | Insert = DAG.getBitcast(VT, Insert); | |||
46647 | return DCI.CombineTo(ML, Insert, Load.getValue(1), true); | |||
46648 | } | |||
46649 | ||||
46650 | static SDValue | |||
46651 | combineMaskedLoadConstantMask(MaskedLoadSDNode *ML, SelectionDAG &DAG, | |||
46652 | TargetLowering::DAGCombinerInfo &DCI) { | |||
46653 | assert(ML->isUnindexed() && "Unexpected indexed masked load!")(static_cast <bool> (ML->isUnindexed() && "Unexpected indexed masked load!" ) ? void (0) : __assert_fail ("ML->isUnindexed() && \"Unexpected indexed masked load!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 46653, __extension__ __PRETTY_FUNCTION__)); | |||
46654 | if (!ISD::isBuildVectorOfConstantSDNodes(ML->getMask().getNode())) | |||
46655 | return SDValue(); | |||
46656 | ||||
46657 | SDLoc DL(ML); | |||
46658 | EVT VT = ML->getValueType(0); | |||
46659 | ||||
46660 | // If we are loading the first and last elements of a vector, it is safe and | |||
46661 | // always faster to load the whole vector. Replace the masked load with a | |||
46662 | // vector load and select. | |||
46663 | unsigned NumElts = VT.getVectorNumElements(); | |||
46664 | BuildVectorSDNode *MaskBV = cast<BuildVectorSDNode>(ML->getMask()); | |||
46665 | bool LoadFirstElt = !isNullConstant(MaskBV->getOperand(0)); | |||
46666 | bool LoadLastElt = !isNullConstant(MaskBV->getOperand(NumElts - 1)); | |||
46667 | if (LoadFirstElt && LoadLastElt) { | |||
46668 | SDValue VecLd = DAG.getLoad(VT, DL, ML->getChain(), ML->getBasePtr(), | |||
46669 | ML->getMemOperand()); | |||
46670 | SDValue Blend = DAG.getSelect(DL, VT, ML->getMask(), VecLd, | |||
46671 | ML->getPassThru()); | |||
46672 | return DCI.CombineTo(ML, Blend, VecLd.getValue(1), true); | |||
46673 | } | |||
46674 | ||||
46675 | // Convert a masked load with a constant mask into a masked load and a select. | |||
46676 | // This allows the select operation to use a faster kind of select instruction | |||
46677 | // (for example, vblendvps -> vblendps). | |||
46678 | ||||
46679 | // Don't try this if the pass-through operand is already undefined. That would | |||
46680 | // cause an infinite loop because that's what we're about to create. | |||
46681 | if (ML->getPassThru().isUndef()) | |||
46682 | return SDValue(); | |||
46683 | ||||
46684 | if (ISD::isBuildVectorAllZeros(ML->getPassThru().getNode())) | |||
46685 | return SDValue(); | |||
46686 | ||||
46687 | // The new masked load has an undef pass-through operand. The select uses the | |||
46688 | // original pass-through operand. | |||
46689 | SDValue NewML = DAG.getMaskedLoad( | |||
46690 | VT, DL, ML->getChain(), ML->getBasePtr(), ML->getOffset(), ML->getMask(), | |||
46691 | DAG.getUNDEF(VT), ML->getMemoryVT(), ML->getMemOperand(), | |||
46692 | ML->getAddressingMode(), ML->getExtensionType()); | |||
46693 | SDValue Blend = DAG.getSelect(DL, VT, ML->getMask(), NewML, | |||
46694 | ML->getPassThru()); | |||
46695 | ||||
46696 | return DCI.CombineTo(ML, Blend, NewML.getValue(1), true); | |||
46697 | } | |||
46698 | ||||
46699 | static SDValue combineMaskedLoad(SDNode *N, SelectionDAG &DAG, | |||
46700 | TargetLowering::DAGCombinerInfo &DCI, | |||
46701 | const X86Subtarget &Subtarget) { | |||
46702 | auto *Mld = cast<MaskedLoadSDNode>(N); | |||
46703 | ||||
46704 | // TODO: Expanding load with constant mask may be optimized as well. | |||
46705 | if (Mld->isExpandingLoad()) | |||
46706 | return SDValue(); | |||
46707 | ||||
46708 | if (Mld->getExtensionType() == ISD::NON_EXTLOAD) { | |||
46709 | if (SDValue ScalarLoad = | |||
46710 | reduceMaskedLoadToScalarLoad(Mld, DAG, DCI, Subtarget)) | |||
46711 | return ScalarLoad; | |||
46712 | ||||
46713 | // TODO: Do some AVX512 subsets benefit from this transform? | |||
46714 | if (!Subtarget.hasAVX512()) | |||
46715 | if (SDValue Blend = combineMaskedLoadConstantMask(Mld, DAG, DCI)) | |||
46716 | return Blend; | |||
46717 | } | |||
46718 | ||||
46719 | // If the mask value has been legalized to a non-boolean vector, try to | |||
46720 | // simplify ops leading up to it. We only demand the MSB of each lane. | |||
46721 | SDValue Mask = Mld->getMask(); | |||
46722 | if (Mask.getScalarValueSizeInBits() != 1) { | |||
46723 | EVT VT = Mld->getValueType(0); | |||
46724 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
46725 | APInt DemandedBits(APInt::getSignMask(VT.getScalarSizeInBits())); | |||
46726 | if (TLI.SimplifyDemandedBits(Mask, DemandedBits, DCI)) { | |||
46727 | if (N->getOpcode() != ISD::DELETED_NODE) | |||
46728 | DCI.AddToWorklist(N); | |||
46729 | return SDValue(N, 0); | |||
46730 | } | |||
46731 | if (SDValue NewMask = | |||
46732 | TLI.SimplifyMultipleUseDemandedBits(Mask, DemandedBits, DAG)) | |||
46733 | return DAG.getMaskedLoad( | |||
46734 | VT, SDLoc(N), Mld->getChain(), Mld->getBasePtr(), Mld->getOffset(), | |||
46735 | NewMask, Mld->getPassThru(), Mld->getMemoryVT(), Mld->getMemOperand(), | |||
46736 | Mld->getAddressingMode(), Mld->getExtensionType()); | |||
46737 | } | |||
46738 | ||||
46739 | return SDValue(); | |||
46740 | } | |||
46741 | ||||
46742 | /// If exactly one element of the mask is set for a non-truncating masked store, | |||
46743 | /// it is a vector extract and scalar store. | |||
46744 | /// Note: It is expected that the degenerate cases of an all-zeros or all-ones | |||
46745 | /// mask have already been optimized in IR, so we don't bother with those here. | |||
46746 | static SDValue reduceMaskedStoreToScalarStore(MaskedStoreSDNode *MS, | |||
46747 | SelectionDAG &DAG, | |||
46748 | const X86Subtarget &Subtarget) { | |||
46749 | // TODO: This is not x86-specific, so it could be lifted to DAGCombiner. | |||
46750 | // However, some target hooks may need to be added to know when the transform | |||
46751 | // is profitable. Endianness would also have to be considered. | |||
46752 | ||||
46753 | SDValue Addr, VecIndex; | |||
46754 | Align Alignment; | |||
46755 | unsigned Offset; | |||
46756 | if (!getParamsForOneTrueMaskedElt(MS, DAG, Addr, VecIndex, Alignment, Offset)) | |||
46757 | return SDValue(); | |||
46758 | ||||
46759 | // Extract the one scalar element that is actually being stored. | |||
46760 | SDLoc DL(MS); | |||
46761 | SDValue Value = MS->getValue(); | |||
46762 | EVT VT = Value.getValueType(); | |||
46763 | EVT EltVT = VT.getVectorElementType(); | |||
46764 | if (EltVT == MVT::i64 && !Subtarget.is64Bit()) { | |||
46765 | EltVT = MVT::f64; | |||
46766 | EVT CastVT = VT.changeVectorElementType(EltVT); | |||
46767 | Value = DAG.getBitcast(CastVT, Value); | |||
46768 | } | |||
46769 | SDValue Extract = | |||
46770 | DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, EltVT, Value, VecIndex); | |||
46771 | ||||
46772 | // Store that element at the appropriate offset from the base pointer. | |||
46773 | return DAG.getStore(MS->getChain(), DL, Extract, Addr, | |||
46774 | MS->getPointerInfo().getWithOffset(Offset), | |||
46775 | Alignment, MS->getMemOperand()->getFlags()); | |||
46776 | } | |||
46777 | ||||
46778 | static SDValue combineMaskedStore(SDNode *N, SelectionDAG &DAG, | |||
46779 | TargetLowering::DAGCombinerInfo &DCI, | |||
46780 | const X86Subtarget &Subtarget) { | |||
46781 | MaskedStoreSDNode *Mst = cast<MaskedStoreSDNode>(N); | |||
46782 | if (Mst->isCompressingStore()) | |||
46783 | return SDValue(); | |||
46784 | ||||
46785 | EVT VT = Mst->getValue().getValueType(); | |||
46786 | SDLoc dl(Mst); | |||
46787 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
46788 | ||||
46789 | if (Mst->isTruncatingStore()) | |||
46790 | return SDValue(); | |||
46791 | ||||
46792 | if (SDValue ScalarStore = reduceMaskedStoreToScalarStore(Mst, DAG, Subtarget)) | |||
46793 | return ScalarStore; | |||
46794 | ||||
46795 | // If the mask value has been legalized to a non-boolean vector, try to | |||
46796 | // simplify ops leading up to it. We only demand the MSB of each lane. | |||
46797 | SDValue Mask = Mst->getMask(); | |||
46798 | if (Mask.getScalarValueSizeInBits() != 1) { | |||
46799 | APInt DemandedBits(APInt::getSignMask(VT.getScalarSizeInBits())); | |||
46800 | if (TLI.SimplifyDemandedBits(Mask, DemandedBits, DCI)) { | |||
46801 | if (N->getOpcode() != ISD::DELETED_NODE) | |||
46802 | DCI.AddToWorklist(N); | |||
46803 | return SDValue(N, 0); | |||
46804 | } | |||
46805 | if (SDValue NewMask = | |||
46806 | TLI.SimplifyMultipleUseDemandedBits(Mask, DemandedBits, DAG)) | |||
46807 | return DAG.getMaskedStore(Mst->getChain(), SDLoc(N), Mst->getValue(), | |||
46808 | Mst->getBasePtr(), Mst->getOffset(), NewMask, | |||
46809 | Mst->getMemoryVT(), Mst->getMemOperand(), | |||
46810 | Mst->getAddressingMode()); | |||
46811 | } | |||
46812 | ||||
46813 | SDValue Value = Mst->getValue(); | |||
46814 | if (Value.getOpcode() == ISD::TRUNCATE && Value.getNode()->hasOneUse() && | |||
46815 | TLI.isTruncStoreLegal(Value.getOperand(0).getValueType(), | |||
46816 | Mst->getMemoryVT())) { | |||
46817 | return DAG.getMaskedStore(Mst->getChain(), SDLoc(N), Value.getOperand(0), | |||
46818 | Mst->getBasePtr(), Mst->getOffset(), Mask, | |||
46819 | Mst->getMemoryVT(), Mst->getMemOperand(), | |||
46820 | Mst->getAddressingMode(), true); | |||
46821 | } | |||
46822 | ||||
46823 | return SDValue(); | |||
46824 | } | |||
46825 | ||||
46826 | static SDValue combineStore(SDNode *N, SelectionDAG &DAG, | |||
46827 | TargetLowering::DAGCombinerInfo &DCI, | |||
46828 | const X86Subtarget &Subtarget) { | |||
46829 | StoreSDNode *St = cast<StoreSDNode>(N); | |||
46830 | EVT StVT = St->getMemoryVT(); | |||
46831 | SDLoc dl(St); | |||
46832 | SDValue StoredVal = St->getValue(); | |||
46833 | EVT VT = StoredVal.getValueType(); | |||
46834 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
46835 | ||||
46836 | // Convert a store of vXi1 into a store of iX and a bitcast. | |||
46837 | if (!Subtarget.hasAVX512() && VT == StVT && VT.isVector() && | |||
46838 | VT.getVectorElementType() == MVT::i1) { | |||
46839 | ||||
46840 | EVT NewVT = EVT::getIntegerVT(*DAG.getContext(), VT.getVectorNumElements()); | |||
46841 | StoredVal = DAG.getBitcast(NewVT, StoredVal); | |||
46842 | ||||
46843 | return DAG.getStore(St->getChain(), dl, StoredVal, St->getBasePtr(), | |||
46844 | St->getPointerInfo(), St->getOriginalAlign(), | |||
46845 | St->getMemOperand()->getFlags()); | |||
46846 | } | |||
46847 | ||||
46848 | // If this is a store of a scalar_to_vector to v1i1, just use a scalar store. | |||
46849 | // This will avoid a copy to k-register. | |||
46850 | if (VT == MVT::v1i1 && VT == StVT && Subtarget.hasAVX512() && | |||
46851 | StoredVal.getOpcode() == ISD::SCALAR_TO_VECTOR && | |||
46852 | StoredVal.getOperand(0).getValueType() == MVT::i8) { | |||
46853 | SDValue Val = StoredVal.getOperand(0); | |||
46854 | // We must store zeros to the unused bits. | |||
46855 | Val = DAG.getZeroExtendInReg(Val, dl, MVT::i1); | |||
46856 | return DAG.getStore(St->getChain(), dl, Val, | |||
46857 | St->getBasePtr(), St->getPointerInfo(), | |||
46858 | St->getOriginalAlign(), | |||
46859 | St->getMemOperand()->getFlags()); | |||
46860 | } | |||
46861 | ||||
46862 | // Widen v2i1/v4i1 stores to v8i1. | |||
46863 | if ((VT == MVT::v1i1 || VT == MVT::v2i1 || VT == MVT::v4i1) && VT == StVT && | |||
46864 | Subtarget.hasAVX512()) { | |||
46865 | unsigned NumConcats = 8 / VT.getVectorNumElements(); | |||
46866 | // We must store zeros to the unused bits. | |||
46867 | SmallVector<SDValue, 4> Ops(NumConcats, DAG.getConstant(0, dl, VT)); | |||
46868 | Ops[0] = StoredVal; | |||
46869 | StoredVal = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v8i1, Ops); | |||
46870 | return DAG.getStore(St->getChain(), dl, StoredVal, St->getBasePtr(), | |||
46871 | St->getPointerInfo(), St->getOriginalAlign(), | |||
46872 | St->getMemOperand()->getFlags()); | |||
46873 | } | |||
46874 | ||||
46875 | // Turn vXi1 stores of constants into a scalar store. | |||
46876 | if ((VT == MVT::v8i1 || VT == MVT::v16i1 || VT == MVT::v32i1 || | |||
46877 | VT == MVT::v64i1) && VT == StVT && TLI.isTypeLegal(VT) && | |||
46878 | ISD::isBuildVectorOfConstantSDNodes(StoredVal.getNode())) { | |||
46879 | // If its a v64i1 store without 64-bit support, we need two stores. | |||
46880 | if (!DCI.isBeforeLegalize() && VT == MVT::v64i1 && !Subtarget.is64Bit()) { | |||
46881 | SDValue Lo = DAG.getBuildVector(MVT::v32i1, dl, | |||
46882 | StoredVal->ops().slice(0, 32)); | |||
46883 | Lo = combinevXi1ConstantToInteger(Lo, DAG); | |||
46884 | SDValue Hi = DAG.getBuildVector(MVT::v32i1, dl, | |||
46885 | StoredVal->ops().slice(32, 32)); | |||
46886 | Hi = combinevXi1ConstantToInteger(Hi, DAG); | |||
46887 | ||||
46888 | SDValue Ptr0 = St->getBasePtr(); | |||
46889 | SDValue Ptr1 = DAG.getMemBasePlusOffset(Ptr0, TypeSize::Fixed(4), dl); | |||
46890 | ||||
46891 | SDValue Ch0 = | |||
46892 | DAG.getStore(St->getChain(), dl, Lo, Ptr0, St->getPointerInfo(), | |||
46893 | St->getOriginalAlign(), | |||
46894 | St->getMemOperand()->getFlags()); | |||
46895 | SDValue Ch1 = | |||
46896 | DAG.getStore(St->getChain(), dl, Hi, Ptr1, | |||
46897 | St->getPointerInfo().getWithOffset(4), | |||
46898 | St->getOriginalAlign(), | |||
46899 | St->getMemOperand()->getFlags()); | |||
46900 | return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Ch0, Ch1); | |||
46901 | } | |||
46902 | ||||
46903 | StoredVal = combinevXi1ConstantToInteger(StoredVal, DAG); | |||
46904 | return DAG.getStore(St->getChain(), dl, StoredVal, St->getBasePtr(), | |||
46905 | St->getPointerInfo(), St->getOriginalAlign(), | |||
46906 | St->getMemOperand()->getFlags()); | |||
46907 | } | |||
46908 | ||||
46909 | // If we are saving a 32-byte vector and 32-byte stores are slow, such as on | |||
46910 | // Sandy Bridge, perform two 16-byte stores. | |||
46911 | bool Fast; | |||
46912 | if (VT.is256BitVector() && StVT == VT && | |||
46913 | TLI.allowsMemoryAccess(*DAG.getContext(), DAG.getDataLayout(), VT, | |||
46914 | *St->getMemOperand(), &Fast) && | |||
46915 | !Fast) { | |||
46916 | unsigned NumElems = VT.getVectorNumElements(); | |||
46917 | if (NumElems < 2) | |||
46918 | return SDValue(); | |||
46919 | ||||
46920 | return splitVectorStore(St, DAG); | |||
46921 | } | |||
46922 | ||||
46923 | // Split under-aligned vector non-temporal stores. | |||
46924 | if (St->isNonTemporal() && StVT == VT && | |||
46925 | St->getAlignment() < VT.getStoreSize()) { | |||
46926 | // ZMM/YMM nt-stores - either it can be stored as a series of shorter | |||
46927 | // vectors or the legalizer can scalarize it to use MOVNTI. | |||
46928 | if (VT.is256BitVector() || VT.is512BitVector()) { | |||
46929 | unsigned NumElems = VT.getVectorNumElements(); | |||
46930 | if (NumElems < 2) | |||
46931 | return SDValue(); | |||
46932 | return splitVectorStore(St, DAG); | |||
46933 | } | |||
46934 | ||||
46935 | // XMM nt-stores - scalarize this to f64 nt-stores on SSE4A, else i32/i64 | |||
46936 | // to use MOVNTI. | |||
46937 | if (VT.is128BitVector() && Subtarget.hasSSE2()) { | |||
46938 | MVT NTVT = Subtarget.hasSSE4A() | |||
46939 | ? MVT::v2f64 | |||
46940 | : (TLI.isTypeLegal(MVT::i64) ? MVT::v2i64 : MVT::v4i32); | |||
46941 | return scalarizeVectorStore(St, NTVT, DAG); | |||
46942 | } | |||
46943 | } | |||
46944 | ||||
46945 | // Try to optimize v16i16->v16i8 truncating stores when BWI is not | |||
46946 | // supported, but avx512f is by extending to v16i32 and truncating. | |||
46947 | if (!St->isTruncatingStore() && VT == MVT::v16i8 && !Subtarget.hasBWI() && | |||
46948 | St->getValue().getOpcode() == ISD::TRUNCATE && | |||
46949 | St->getValue().getOperand(0).getValueType() == MVT::v16i16 && | |||
46950 | TLI.isTruncStoreLegal(MVT::v16i32, MVT::v16i8) && | |||
46951 | St->getValue().hasOneUse() && !DCI.isBeforeLegalizeOps()) { | |||
46952 | SDValue Ext = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::v16i32, St->getValue()); | |||
46953 | return DAG.getTruncStore(St->getChain(), dl, Ext, St->getBasePtr(), | |||
46954 | MVT::v16i8, St->getMemOperand()); | |||
46955 | } | |||
46956 | ||||
46957 | // Try to fold a VTRUNCUS or VTRUNCS into a truncating store. | |||
46958 | if (!St->isTruncatingStore() && StoredVal.hasOneUse() && | |||
46959 | (StoredVal.getOpcode() == X86ISD::VTRUNCUS || | |||
46960 | StoredVal.getOpcode() == X86ISD::VTRUNCS) && | |||
46961 | TLI.isTruncStoreLegal(StoredVal.getOperand(0).getValueType(), VT)) { | |||
46962 | bool IsSigned = StoredVal.getOpcode() == X86ISD::VTRUNCS; | |||
46963 | return EmitTruncSStore(IsSigned, St->getChain(), | |||
46964 | dl, StoredVal.getOperand(0), St->getBasePtr(), | |||
46965 | VT, St->getMemOperand(), DAG); | |||
46966 | } | |||
46967 | ||||
46968 | // Try to fold a extract_element(VTRUNC) pattern into a truncating store. | |||
46969 | if (!St->isTruncatingStore() && StoredVal.hasOneUse()) { | |||
46970 | auto IsExtractedElement = [](SDValue V) { | |||
46971 | if (V.getOpcode() == ISD::TRUNCATE && V.getOperand(0).hasOneUse()) | |||
46972 | V = V.getOperand(0); | |||
46973 | unsigned Opc = V.getOpcode(); | |||
46974 | if (Opc == ISD::EXTRACT_VECTOR_ELT || Opc == X86ISD::PEXTRW) { | |||
46975 | if (V.getOperand(0).hasOneUse() && isNullConstant(V.getOperand(1))) | |||
46976 | return V.getOperand(0); | |||
46977 | } | |||
46978 | return SDValue(); | |||
46979 | }; | |||
46980 | if (SDValue Extract = IsExtractedElement(StoredVal)) { | |||
46981 | SDValue Trunc = peekThroughOneUseBitcasts(Extract); | |||
46982 | if (Trunc.getOpcode() == X86ISD::VTRUNC) { | |||
46983 | SDValue Src = Trunc.getOperand(0); | |||
46984 | MVT DstVT = Trunc.getSimpleValueType(); | |||
46985 | MVT SrcVT = Src.getSimpleValueType(); | |||
46986 | unsigned NumSrcElts = SrcVT.getVectorNumElements(); | |||
46987 | unsigned NumTruncBits = DstVT.getScalarSizeInBits() * NumSrcElts; | |||
46988 | MVT TruncVT = MVT::getVectorVT(DstVT.getScalarType(), NumSrcElts); | |||
46989 | if (NumTruncBits == VT.getSizeInBits() && | |||
46990 | TLI.isTruncStoreLegal(SrcVT, TruncVT)) { | |||
46991 | return DAG.getTruncStore(St->getChain(), dl, Src, St->getBasePtr(), | |||
46992 | TruncVT, St->getMemOperand()); | |||
46993 | } | |||
46994 | } | |||
46995 | } | |||
46996 | } | |||
46997 | ||||
46998 | // Optimize trunc store (of multiple scalars) to shuffle and store. | |||
46999 | // First, pack all of the elements in one place. Next, store to memory | |||
47000 | // in fewer chunks. | |||
47001 | if (St->isTruncatingStore() && VT.isVector()) { | |||
47002 | // Check if we can detect an AVG pattern from the truncation. If yes, | |||
47003 | // replace the trunc store by a normal store with the result of X86ISD::AVG | |||
47004 | // instruction. | |||
47005 | if (DCI.isBeforeLegalize() || TLI.isTypeLegal(St->getMemoryVT())) | |||
47006 | if (SDValue Avg = detectAVGPattern(St->getValue(), St->getMemoryVT(), DAG, | |||
47007 | Subtarget, dl)) | |||
47008 | return DAG.getStore(St->getChain(), dl, Avg, St->getBasePtr(), | |||
47009 | St->getPointerInfo(), St->getOriginalAlign(), | |||
47010 | St->getMemOperand()->getFlags()); | |||
47011 | ||||
47012 | if (TLI.isTruncStoreLegal(VT, StVT)) { | |||
47013 | if (SDValue Val = detectSSatPattern(St->getValue(), St->getMemoryVT())) | |||
47014 | return EmitTruncSStore(true /* Signed saturation */, St->getChain(), | |||
47015 | dl, Val, St->getBasePtr(), | |||
47016 | St->getMemoryVT(), St->getMemOperand(), DAG); | |||
47017 | if (SDValue Val = detectUSatPattern(St->getValue(), St->getMemoryVT(), | |||
47018 | DAG, dl)) | |||
47019 | return EmitTruncSStore(false /* Unsigned saturation */, St->getChain(), | |||
47020 | dl, Val, St->getBasePtr(), | |||
47021 | St->getMemoryVT(), St->getMemOperand(), DAG); | |||
47022 | } | |||
47023 | ||||
47024 | return SDValue(); | |||
47025 | } | |||
47026 | ||||
47027 | // Cast ptr32 and ptr64 pointers to the default address space before a store. | |||
47028 | unsigned AddrSpace = St->getAddressSpace(); | |||
47029 | if (AddrSpace == X86AS::PTR64 || AddrSpace == X86AS::PTR32_SPTR || | |||
47030 | AddrSpace == X86AS::PTR32_UPTR) { | |||
47031 | MVT PtrVT = TLI.getPointerTy(DAG.getDataLayout()); | |||
47032 | if (PtrVT != St->getBasePtr().getSimpleValueType()) { | |||
47033 | SDValue Cast = | |||
47034 | DAG.getAddrSpaceCast(dl, PtrVT, St->getBasePtr(), AddrSpace, 0); | |||
47035 | return DAG.getStore(St->getChain(), dl, StoredVal, Cast, | |||
47036 | St->getPointerInfo(), St->getOriginalAlign(), | |||
47037 | St->getMemOperand()->getFlags(), St->getAAInfo()); | |||
47038 | } | |||
47039 | } | |||
47040 | ||||
47041 | // Turn load->store of MMX types into GPR load/stores. This avoids clobbering | |||
47042 | // the FP state in cases where an emms may be missing. | |||
47043 | // A preferable solution to the general problem is to figure out the right | |||
47044 | // places to insert EMMS. This qualifies as a quick hack. | |||
47045 | ||||
47046 | // Similarly, turn load->store of i64 into double load/stores in 32-bit mode. | |||
47047 | if (VT.getSizeInBits() != 64) | |||
47048 | return SDValue(); | |||
47049 | ||||
47050 | const Function &F = DAG.getMachineFunction().getFunction(); | |||
47051 | bool NoImplicitFloatOps = F.hasFnAttribute(Attribute::NoImplicitFloat); | |||
47052 | bool F64IsLegal = | |||
47053 | !Subtarget.useSoftFloat() && !NoImplicitFloatOps && Subtarget.hasSSE2(); | |||
47054 | if ((VT == MVT::i64 && F64IsLegal && !Subtarget.is64Bit()) && | |||
47055 | isa<LoadSDNode>(St->getValue()) && | |||
47056 | cast<LoadSDNode>(St->getValue())->isSimple() && | |||
47057 | St->getChain().hasOneUse() && St->isSimple()) { | |||
47058 | LoadSDNode *Ld = cast<LoadSDNode>(St->getValue().getNode()); | |||
47059 | ||||
47060 | if (!ISD::isNormalLoad(Ld)) | |||
47061 | return SDValue(); | |||
47062 | ||||
47063 | // Avoid the transformation if there are multiple uses of the loaded value. | |||
47064 | if (!Ld->hasNUsesOfValue(1, 0)) | |||
47065 | return SDValue(); | |||
47066 | ||||
47067 | SDLoc LdDL(Ld); | |||
47068 | SDLoc StDL(N); | |||
47069 | // Lower to a single movq load/store pair. | |||
47070 | SDValue NewLd = DAG.getLoad(MVT::f64, LdDL, Ld->getChain(), | |||
47071 | Ld->getBasePtr(), Ld->getMemOperand()); | |||
47072 | ||||
47073 | // Make sure new load is placed in same chain order. | |||
47074 | DAG.makeEquivalentMemoryOrdering(Ld, NewLd); | |||
47075 | return DAG.getStore(St->getChain(), StDL, NewLd, St->getBasePtr(), | |||
47076 | St->getMemOperand()); | |||
47077 | } | |||
47078 | ||||
47079 | // This is similar to the above case, but here we handle a scalar 64-bit | |||
47080 | // integer store that is extracted from a vector on a 32-bit target. | |||
47081 | // If we have SSE2, then we can treat it like a floating-point double | |||
47082 | // to get past legalization. The execution dependencies fixup pass will | |||
47083 | // choose the optimal machine instruction for the store if this really is | |||
47084 | // an integer or v2f32 rather than an f64. | |||
47085 | if (VT == MVT::i64 && F64IsLegal && !Subtarget.is64Bit() && | |||
47086 | St->getOperand(1).getOpcode() == ISD::EXTRACT_VECTOR_ELT) { | |||
47087 | SDValue OldExtract = St->getOperand(1); | |||
47088 | SDValue ExtOp0 = OldExtract.getOperand(0); | |||
47089 | unsigned VecSize = ExtOp0.getValueSizeInBits(); | |||
47090 | EVT VecVT = EVT::getVectorVT(*DAG.getContext(), MVT::f64, VecSize / 64); | |||
47091 | SDValue BitCast = DAG.getBitcast(VecVT, ExtOp0); | |||
47092 | SDValue NewExtract = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, | |||
47093 | BitCast, OldExtract.getOperand(1)); | |||
47094 | return DAG.getStore(St->getChain(), dl, NewExtract, St->getBasePtr(), | |||
47095 | St->getPointerInfo(), St->getOriginalAlign(), | |||
47096 | St->getMemOperand()->getFlags()); | |||
47097 | } | |||
47098 | ||||
47099 | return SDValue(); | |||
47100 | } | |||
47101 | ||||
47102 | static SDValue combineVEXTRACT_STORE(SDNode *N, SelectionDAG &DAG, | |||
47103 | TargetLowering::DAGCombinerInfo &DCI, | |||
47104 | const X86Subtarget &Subtarget) { | |||
47105 | auto *St = cast<MemIntrinsicSDNode>(N); | |||
47106 | ||||
47107 | SDValue StoredVal = N->getOperand(1); | |||
47108 | MVT VT = StoredVal.getSimpleValueType(); | |||
47109 | EVT MemVT = St->getMemoryVT(); | |||
47110 | ||||
47111 | // Figure out which elements we demand. | |||
47112 | unsigned StElts = MemVT.getSizeInBits() / VT.getScalarSizeInBits(); | |||
47113 | APInt DemandedElts = APInt::getLowBitsSet(VT.getVectorNumElements(), StElts); | |||
47114 | ||||
47115 | APInt KnownUndef, KnownZero; | |||
47116 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
47117 | if (TLI.SimplifyDemandedVectorElts(StoredVal, DemandedElts, KnownUndef, | |||
47118 | KnownZero, DCI)) { | |||
47119 | if (N->getOpcode() != ISD::DELETED_NODE) | |||
47120 | DCI.AddToWorklist(N); | |||
47121 | return SDValue(N, 0); | |||
47122 | } | |||
47123 | ||||
47124 | return SDValue(); | |||
47125 | } | |||
47126 | ||||
47127 | /// Return 'true' if this vector operation is "horizontal" | |||
47128 | /// and return the operands for the horizontal operation in LHS and RHS. A | |||
47129 | /// horizontal operation performs the binary operation on successive elements | |||
47130 | /// of its first operand, then on successive elements of its second operand, | |||
47131 | /// returning the resulting values in a vector. For example, if | |||
47132 | /// A = < float a0, float a1, float a2, float a3 > | |||
47133 | /// and | |||
47134 | /// B = < float b0, float b1, float b2, float b3 > | |||
47135 | /// then the result of doing a horizontal operation on A and B is | |||
47136 | /// A horizontal-op B = < a0 op a1, a2 op a3, b0 op b1, b2 op b3 >. | |||
47137 | /// In short, LHS and RHS are inspected to see if LHS op RHS is of the form | |||
47138 | /// A horizontal-op B, for some already available A and B, and if so then LHS is | |||
47139 | /// set to A, RHS to B, and the routine returns 'true'. | |||
47140 | static bool isHorizontalBinOp(unsigned HOpcode, SDValue &LHS, SDValue &RHS, | |||
47141 | SelectionDAG &DAG, const X86Subtarget &Subtarget, | |||
47142 | bool IsCommutative, | |||
47143 | SmallVectorImpl<int> &PostShuffleMask) { | |||
47144 | // If either operand is undef, bail out. The binop should be simplified. | |||
47145 | if (LHS.isUndef() || RHS.isUndef()) | |||
47146 | return false; | |||
47147 | ||||
47148 | // Look for the following pattern: | |||
47149 | // A = < float a0, float a1, float a2, float a3 > | |||
47150 | // B = < float b0, float b1, float b2, float b3 > | |||
47151 | // and | |||
47152 | // LHS = VECTOR_SHUFFLE A, B, <0, 2, 4, 6> | |||
47153 | // RHS = VECTOR_SHUFFLE A, B, <1, 3, 5, 7> | |||
47154 | // then LHS op RHS = < a0 op a1, a2 op a3, b0 op b1, b2 op b3 > | |||
47155 | // which is A horizontal-op B. | |||
47156 | ||||
47157 | MVT VT = LHS.getSimpleValueType(); | |||
47158 | assert((VT.is128BitVector() || VT.is256BitVector()) &&(static_cast <bool> ((VT.is128BitVector() || VT.is256BitVector ()) && "Unsupported vector type for horizontal add/sub" ) ? void (0) : __assert_fail ("(VT.is128BitVector() || VT.is256BitVector()) && \"Unsupported vector type for horizontal add/sub\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 47159, __extension__ __PRETTY_FUNCTION__)) | |||
47159 | "Unsupported vector type for horizontal add/sub")(static_cast <bool> ((VT.is128BitVector() || VT.is256BitVector ()) && "Unsupported vector type for horizontal add/sub" ) ? void (0) : __assert_fail ("(VT.is128BitVector() || VT.is256BitVector()) && \"Unsupported vector type for horizontal add/sub\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 47159, __extension__ __PRETTY_FUNCTION__)); | |||
47160 | unsigned NumElts = VT.getVectorNumElements(); | |||
47161 | ||||
47162 | auto GetShuffle = [&](SDValue Op, SDValue &N0, SDValue &N1, | |||
47163 | SmallVectorImpl<int> &ShuffleMask) { | |||
47164 | bool UseSubVector = false; | |||
47165 | if (Op.getOpcode() == ISD::EXTRACT_SUBVECTOR && | |||
47166 | Op.getOperand(0).getValueType().is256BitVector() && | |||
47167 | llvm::isNullConstant(Op.getOperand(1))) { | |||
47168 | Op = Op.getOperand(0); | |||
47169 | UseSubVector = true; | |||
47170 | } | |||
47171 | SmallVector<SDValue, 2> SrcOps; | |||
47172 | SmallVector<int, 16> SrcMask, ScaledMask; | |||
47173 | SDValue BC = peekThroughBitcasts(Op); | |||
47174 | if (getTargetShuffleInputs(BC, SrcOps, SrcMask, DAG) && | |||
47175 | !isAnyZero(SrcMask) && all_of(SrcOps, [BC](SDValue Op) { | |||
47176 | return Op.getValueSizeInBits() == BC.getValueSizeInBits(); | |||
47177 | })) { | |||
47178 | resolveTargetShuffleInputsAndMask(SrcOps, SrcMask); | |||
47179 | if (!UseSubVector && SrcOps.size() <= 2 && | |||
47180 | scaleShuffleElements(SrcMask, NumElts, ScaledMask)) { | |||
47181 | N0 = SrcOps.size() > 0 ? SrcOps[0] : SDValue(); | |||
47182 | N1 = SrcOps.size() > 1 ? SrcOps[1] : SDValue(); | |||
47183 | ShuffleMask.assign(ScaledMask.begin(), ScaledMask.end()); | |||
47184 | } | |||
47185 | if (UseSubVector && SrcOps.size() == 1 && | |||
47186 | scaleShuffleElements(SrcMask, 2 * NumElts, ScaledMask)) { | |||
47187 | std::tie(N0, N1) = DAG.SplitVector(SrcOps[0], SDLoc(Op)); | |||
47188 | ArrayRef<int> Mask = ArrayRef<int>(ScaledMask).slice(0, NumElts); | |||
47189 | ShuffleMask.assign(Mask.begin(), Mask.end()); | |||
47190 | } | |||
47191 | } | |||
47192 | }; | |||
47193 | ||||
47194 | // View LHS in the form | |||
47195 | // LHS = VECTOR_SHUFFLE A, B, LMask | |||
47196 | // If LHS is not a shuffle, then pretend it is the identity shuffle: | |||
47197 | // LHS = VECTOR_SHUFFLE LHS, undef, <0, 1, ..., N-1> | |||
47198 | // NOTE: A default initialized SDValue represents an UNDEF of type VT. | |||
47199 | SDValue A, B; | |||
47200 | SmallVector<int, 16> LMask; | |||
47201 | GetShuffle(LHS, A, B, LMask); | |||
47202 | ||||
47203 | // Likewise, view RHS in the form | |||
47204 | // RHS = VECTOR_SHUFFLE C, D, RMask | |||
47205 | SDValue C, D; | |||
47206 | SmallVector<int, 16> RMask; | |||
47207 | GetShuffle(RHS, C, D, RMask); | |||
47208 | ||||
47209 | // At least one of the operands should be a vector shuffle. | |||
47210 | unsigned NumShuffles = (LMask.empty() ? 0 : 1) + (RMask.empty() ? 0 : 1); | |||
47211 | if (NumShuffles == 0) | |||
47212 | return false; | |||
47213 | ||||
47214 | if (LMask.empty()) { | |||
47215 | A = LHS; | |||
47216 | for (unsigned i = 0; i != NumElts; ++i) | |||
47217 | LMask.push_back(i); | |||
47218 | } | |||
47219 | ||||
47220 | if (RMask.empty()) { | |||
47221 | C = RHS; | |||
47222 | for (unsigned i = 0; i != NumElts; ++i) | |||
47223 | RMask.push_back(i); | |||
47224 | } | |||
47225 | ||||
47226 | // If we have an unary mask, ensure the other op is set to null. | |||
47227 | if (isUndefOrInRange(LMask, 0, NumElts)) | |||
47228 | B = SDValue(); | |||
47229 | else if (isUndefOrInRange(LMask, NumElts, NumElts * 2)) | |||
47230 | A = SDValue(); | |||
47231 | ||||
47232 | if (isUndefOrInRange(RMask, 0, NumElts)) | |||
47233 | D = SDValue(); | |||
47234 | else if (isUndefOrInRange(RMask, NumElts, NumElts * 2)) | |||
47235 | C = SDValue(); | |||
47236 | ||||
47237 | // If A and B occur in reverse order in RHS, then canonicalize by commuting | |||
47238 | // RHS operands and shuffle mask. | |||
47239 | if (A != C) { | |||
47240 | std::swap(C, D); | |||
47241 | ShuffleVectorSDNode::commuteMask(RMask); | |||
47242 | } | |||
47243 | // Check that the shuffles are both shuffling the same vectors. | |||
47244 | if (!(A == C && B == D)) | |||
47245 | return false; | |||
47246 | ||||
47247 | PostShuffleMask.clear(); | |||
47248 | PostShuffleMask.append(NumElts, SM_SentinelUndef); | |||
47249 | ||||
47250 | // LHS and RHS are now: | |||
47251 | // LHS = shuffle A, B, LMask | |||
47252 | // RHS = shuffle A, B, RMask | |||
47253 | // Check that the masks correspond to performing a horizontal operation. | |||
47254 | // AVX defines horizontal add/sub to operate independently on 128-bit lanes, | |||
47255 | // so we just repeat the inner loop if this is a 256-bit op. | |||
47256 | unsigned Num128BitChunks = VT.getSizeInBits() / 128; | |||
47257 | unsigned NumEltsPer128BitChunk = NumElts / Num128BitChunks; | |||
47258 | unsigned NumEltsPer64BitChunk = NumEltsPer128BitChunk / 2; | |||
47259 | assert((NumEltsPer128BitChunk % 2 == 0) &&(static_cast <bool> ((NumEltsPer128BitChunk % 2 == 0) && "Vector type should have an even number of elements in each lane" ) ? void (0) : __assert_fail ("(NumEltsPer128BitChunk % 2 == 0) && \"Vector type should have an even number of elements in each lane\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 47260, __extension__ __PRETTY_FUNCTION__)) | |||
47260 | "Vector type should have an even number of elements in each lane")(static_cast <bool> ((NumEltsPer128BitChunk % 2 == 0) && "Vector type should have an even number of elements in each lane" ) ? void (0) : __assert_fail ("(NumEltsPer128BitChunk % 2 == 0) && \"Vector type should have an even number of elements in each lane\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 47260, __extension__ __PRETTY_FUNCTION__)); | |||
47261 | for (unsigned j = 0; j != NumElts; j += NumEltsPer128BitChunk) { | |||
47262 | for (unsigned i = 0; i != NumEltsPer128BitChunk; ++i) { | |||
47263 | // Ignore undefined components. | |||
47264 | int LIdx = LMask[i + j], RIdx = RMask[i + j]; | |||
47265 | if (LIdx < 0 || RIdx < 0 || | |||
47266 | (!A.getNode() && (LIdx < (int)NumElts || RIdx < (int)NumElts)) || | |||
47267 | (!B.getNode() && (LIdx >= (int)NumElts || RIdx >= (int)NumElts))) | |||
47268 | continue; | |||
47269 | ||||
47270 | // Check that successive odd/even elements are being operated on. If not, | |||
47271 | // this is not a horizontal operation. | |||
47272 | if (!((RIdx & 1) == 1 && (LIdx + 1) == RIdx) && | |||
47273 | !((LIdx & 1) == 1 && (RIdx + 1) == LIdx && IsCommutative)) | |||
47274 | return false; | |||
47275 | ||||
47276 | // Compute the post-shuffle mask index based on where the element | |||
47277 | // is stored in the HOP result, and where it needs to be moved to. | |||
47278 | int Base = LIdx & ~1u; | |||
47279 | int Index = ((Base % NumEltsPer128BitChunk) / 2) + | |||
47280 | ((Base % NumElts) & ~(NumEltsPer128BitChunk - 1)); | |||
47281 | ||||
47282 | // The low half of the 128-bit result must choose from A. | |||
47283 | // The high half of the 128-bit result must choose from B, | |||
47284 | // unless B is undef. In that case, we are always choosing from A. | |||
47285 | if ((B && Base >= (int)NumElts) || (!B && i >= NumEltsPer64BitChunk)) | |||
47286 | Index += NumEltsPer64BitChunk; | |||
47287 | PostShuffleMask[i + j] = Index; | |||
47288 | } | |||
47289 | } | |||
47290 | ||||
47291 | SDValue NewLHS = A.getNode() ? A : B; // If A is 'UNDEF', use B for it. | |||
47292 | SDValue NewRHS = B.getNode() ? B : A; // If B is 'UNDEF', use A for it. | |||
47293 | ||||
47294 | bool IsIdentityPostShuffle = | |||
47295 | isSequentialOrUndefInRange(PostShuffleMask, 0, NumElts, 0); | |||
47296 | if (IsIdentityPostShuffle) | |||
47297 | PostShuffleMask.clear(); | |||
47298 | ||||
47299 | // Avoid 128-bit multi lane shuffles if pre-AVX2 and FP (integer will split). | |||
47300 | if (!IsIdentityPostShuffle && !Subtarget.hasAVX2() && VT.isFloatingPoint() && | |||
47301 | isMultiLaneShuffleMask(128, VT.getScalarSizeInBits(), PostShuffleMask)) | |||
47302 | return false; | |||
47303 | ||||
47304 | // If the source nodes are already used in HorizOps then always accept this. | |||
47305 | // Shuffle folding should merge these back together. | |||
47306 | bool FoundHorizLHS = llvm::any_of(NewLHS->uses(), [&](SDNode *User) { | |||
47307 | return User->getOpcode() == HOpcode && User->getValueType(0) == VT; | |||
47308 | }); | |||
47309 | bool FoundHorizRHS = llvm::any_of(NewRHS->uses(), [&](SDNode *User) { | |||
47310 | return User->getOpcode() == HOpcode && User->getValueType(0) == VT; | |||
47311 | }); | |||
47312 | bool ForceHorizOp = FoundHorizLHS && FoundHorizRHS; | |||
47313 | ||||
47314 | // Assume a SingleSource HOP if we only shuffle one input and don't need to | |||
47315 | // shuffle the result. | |||
47316 | if (!ForceHorizOp && | |||
47317 | !shouldUseHorizontalOp(NewLHS == NewRHS && | |||
47318 | (NumShuffles < 2 || !IsIdentityPostShuffle), | |||
47319 | DAG, Subtarget)) | |||
47320 | return false; | |||
47321 | ||||
47322 | LHS = DAG.getBitcast(VT, NewLHS); | |||
47323 | RHS = DAG.getBitcast(VT, NewRHS); | |||
47324 | return true; | |||
47325 | } | |||
47326 | ||||
47327 | // Try to synthesize horizontal (f)hadd/hsub from (f)adds/subs of shuffles. | |||
47328 | static SDValue combineToHorizontalAddSub(SDNode *N, SelectionDAG &DAG, | |||
47329 | const X86Subtarget &Subtarget) { | |||
47330 | EVT VT = N->getValueType(0); | |||
47331 | unsigned Opcode = N->getOpcode(); | |||
47332 | bool IsAdd = (Opcode == ISD::FADD) || (Opcode == ISD::ADD); | |||
47333 | SmallVector<int, 8> PostShuffleMask; | |||
47334 | ||||
47335 | switch (Opcode) { | |||
47336 | case ISD::FADD: | |||
47337 | case ISD::FSUB: | |||
47338 | if ((Subtarget.hasSSE3() && (VT == MVT::v4f32 || VT == MVT::v2f64)) || | |||
47339 | (Subtarget.hasAVX() && (VT == MVT::v8f32 || VT == MVT::v4f64))) { | |||
47340 | SDValue LHS = N->getOperand(0); | |||
47341 | SDValue RHS = N->getOperand(1); | |||
47342 | auto HorizOpcode = IsAdd ? X86ISD::FHADD : X86ISD::FHSUB; | |||
47343 | if (isHorizontalBinOp(HorizOpcode, LHS, RHS, DAG, Subtarget, IsAdd, | |||
47344 | PostShuffleMask)) { | |||
47345 | SDValue HorizBinOp = DAG.getNode(HorizOpcode, SDLoc(N), VT, LHS, RHS); | |||
47346 | if (!PostShuffleMask.empty()) | |||
47347 | HorizBinOp = DAG.getVectorShuffle(VT, SDLoc(HorizBinOp), HorizBinOp, | |||
47348 | DAG.getUNDEF(VT), PostShuffleMask); | |||
47349 | return HorizBinOp; | |||
47350 | } | |||
47351 | } | |||
47352 | break; | |||
47353 | case ISD::ADD: | |||
47354 | case ISD::SUB: | |||
47355 | if (Subtarget.hasSSSE3() && (VT == MVT::v8i16 || VT == MVT::v4i32 || | |||
47356 | VT == MVT::v16i16 || VT == MVT::v8i32)) { | |||
47357 | SDValue LHS = N->getOperand(0); | |||
47358 | SDValue RHS = N->getOperand(1); | |||
47359 | auto HorizOpcode = IsAdd ? X86ISD::HADD : X86ISD::HSUB; | |||
47360 | if (isHorizontalBinOp(HorizOpcode, LHS, RHS, DAG, Subtarget, IsAdd, | |||
47361 | PostShuffleMask)) { | |||
47362 | auto HOpBuilder = [HorizOpcode](SelectionDAG &DAG, const SDLoc &DL, | |||
47363 | ArrayRef<SDValue> Ops) { | |||
47364 | return DAG.getNode(HorizOpcode, DL, Ops[0].getValueType(), Ops); | |||
47365 | }; | |||
47366 | SDValue HorizBinOp = SplitOpsAndApply(DAG, Subtarget, SDLoc(N), VT, | |||
47367 | {LHS, RHS}, HOpBuilder); | |||
47368 | if (!PostShuffleMask.empty()) | |||
47369 | HorizBinOp = DAG.getVectorShuffle(VT, SDLoc(HorizBinOp), HorizBinOp, | |||
47370 | DAG.getUNDEF(VT), PostShuffleMask); | |||
47371 | return HorizBinOp; | |||
47372 | } | |||
47373 | } | |||
47374 | break; | |||
47375 | } | |||
47376 | ||||
47377 | return SDValue(); | |||
47378 | } | |||
47379 | ||||
47380 | /// Do target-specific dag combines on floating-point adds/subs. | |||
47381 | static SDValue combineFaddFsub(SDNode *N, SelectionDAG &DAG, | |||
47382 | const X86Subtarget &Subtarget) { | |||
47383 | if (SDValue HOp = combineToHorizontalAddSub(N, DAG, Subtarget)) | |||
47384 | return HOp; | |||
47385 | return SDValue(); | |||
47386 | } | |||
47387 | ||||
47388 | /// Attempt to pre-truncate inputs to arithmetic ops if it will simplify | |||
47389 | /// the codegen. | |||
47390 | /// e.g. TRUNC( BINOP( X, Y ) ) --> BINOP( TRUNC( X ), TRUNC( Y ) ) | |||
47391 | /// TODO: This overlaps with the generic combiner's visitTRUNCATE. Remove | |||
47392 | /// anything that is guaranteed to be transformed by DAGCombiner. | |||
47393 | static SDValue combineTruncatedArithmetic(SDNode *N, SelectionDAG &DAG, | |||
47394 | const X86Subtarget &Subtarget, | |||
47395 | const SDLoc &DL) { | |||
47396 | assert(N->getOpcode() == ISD::TRUNCATE && "Wrong opcode")(static_cast <bool> (N->getOpcode() == ISD::TRUNCATE && "Wrong opcode") ? void (0) : __assert_fail ("N->getOpcode() == ISD::TRUNCATE && \"Wrong opcode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 47396, __extension__ __PRETTY_FUNCTION__)); | |||
47397 | SDValue Src = N->getOperand(0); | |||
47398 | unsigned SrcOpcode = Src.getOpcode(); | |||
47399 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
47400 | ||||
47401 | EVT VT = N->getValueType(0); | |||
47402 | EVT SrcVT = Src.getValueType(); | |||
47403 | ||||
47404 | auto IsFreeTruncation = [VT](SDValue Op) { | |||
47405 | unsigned TruncSizeInBits = VT.getScalarSizeInBits(); | |||
47406 | ||||
47407 | // See if this has been extended from a smaller/equal size to | |||
47408 | // the truncation size, allowing a truncation to combine with the extend. | |||
47409 | unsigned Opcode = Op.getOpcode(); | |||
47410 | if ((Opcode == ISD::ANY_EXTEND || Opcode == ISD::SIGN_EXTEND || | |||
47411 | Opcode == ISD::ZERO_EXTEND) && | |||
47412 | Op.getOperand(0).getScalarValueSizeInBits() <= TruncSizeInBits) | |||
47413 | return true; | |||
47414 | ||||
47415 | // See if this is a single use constant which can be constant folded. | |||
47416 | // NOTE: We don't peek throught bitcasts here because there is currently | |||
47417 | // no support for constant folding truncate+bitcast+vector_of_constants. So | |||
47418 | // we'll just send up with a truncate on both operands which will | |||
47419 | // get turned back into (truncate (binop)) causing an infinite loop. | |||
47420 | return ISD::isBuildVectorOfConstantSDNodes(Op.getNode()); | |||
47421 | }; | |||
47422 | ||||
47423 | auto TruncateArithmetic = [&](SDValue N0, SDValue N1) { | |||
47424 | SDValue Trunc0 = DAG.getNode(ISD::TRUNCATE, DL, VT, N0); | |||
47425 | SDValue Trunc1 = DAG.getNode(ISD::TRUNCATE, DL, VT, N1); | |||
47426 | return DAG.getNode(SrcOpcode, DL, VT, Trunc0, Trunc1); | |||
47427 | }; | |||
47428 | ||||
47429 | // Don't combine if the operation has other uses. | |||
47430 | if (!Src.hasOneUse()) | |||
47431 | return SDValue(); | |||
47432 | ||||
47433 | // Only support vector truncation for now. | |||
47434 | // TODO: i64 scalar math would benefit as well. | |||
47435 | if (!VT.isVector()) | |||
47436 | return SDValue(); | |||
47437 | ||||
47438 | // In most cases its only worth pre-truncating if we're only facing the cost | |||
47439 | // of one truncation. | |||
47440 | // i.e. if one of the inputs will constant fold or the input is repeated. | |||
47441 | switch (SrcOpcode) { | |||
47442 | case ISD::MUL: | |||
47443 | // X86 is rubbish at scalar and vector i64 multiplies (until AVX512DQ) - its | |||
47444 | // better to truncate if we have the chance. | |||
47445 | if (SrcVT.getScalarType() == MVT::i64 && | |||
47446 | TLI.isOperationLegal(SrcOpcode, VT) && | |||
47447 | !TLI.isOperationLegal(SrcOpcode, SrcVT)) | |||
47448 | return TruncateArithmetic(Src.getOperand(0), Src.getOperand(1)); | |||
47449 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
47450 | case ISD::AND: | |||
47451 | case ISD::XOR: | |||
47452 | case ISD::OR: | |||
47453 | case ISD::ADD: | |||
47454 | case ISD::SUB: { | |||
47455 | SDValue Op0 = Src.getOperand(0); | |||
47456 | SDValue Op1 = Src.getOperand(1); | |||
47457 | if (TLI.isOperationLegal(SrcOpcode, VT) && | |||
47458 | (Op0 == Op1 || IsFreeTruncation(Op0) || IsFreeTruncation(Op1))) | |||
47459 | return TruncateArithmetic(Op0, Op1); | |||
47460 | break; | |||
47461 | } | |||
47462 | } | |||
47463 | ||||
47464 | return SDValue(); | |||
47465 | } | |||
47466 | ||||
47467 | /// Truncate using ISD::AND mask and X86ISD::PACKUS. | |||
47468 | /// e.g. trunc <8 x i32> X to <8 x i16> --> | |||
47469 | /// MaskX = X & 0xffff (clear high bits to prevent saturation) | |||
47470 | /// packus (extract_subv MaskX, 0), (extract_subv MaskX, 1) | |||
47471 | static SDValue combineVectorTruncationWithPACKUS(SDNode *N, const SDLoc &DL, | |||
47472 | const X86Subtarget &Subtarget, | |||
47473 | SelectionDAG &DAG) { | |||
47474 | SDValue In = N->getOperand(0); | |||
47475 | EVT InVT = In.getValueType(); | |||
47476 | EVT OutVT = N->getValueType(0); | |||
47477 | ||||
47478 | APInt Mask = APInt::getLowBitsSet(InVT.getScalarSizeInBits(), | |||
47479 | OutVT.getScalarSizeInBits()); | |||
47480 | In = DAG.getNode(ISD::AND, DL, InVT, In, DAG.getConstant(Mask, DL, InVT)); | |||
47481 | return truncateVectorWithPACK(X86ISD::PACKUS, OutVT, In, DL, DAG, Subtarget); | |||
47482 | } | |||
47483 | ||||
47484 | /// Truncate a group of v4i32 into v8i16 using X86ISD::PACKSS. | |||
47485 | static SDValue combineVectorTruncationWithPACKSS(SDNode *N, const SDLoc &DL, | |||
47486 | const X86Subtarget &Subtarget, | |||
47487 | SelectionDAG &DAG) { | |||
47488 | SDValue In = N->getOperand(0); | |||
47489 | EVT InVT = In.getValueType(); | |||
47490 | EVT OutVT = N->getValueType(0); | |||
47491 | In = DAG.getNode(ISD::SIGN_EXTEND_INREG, DL, InVT, In, | |||
47492 | DAG.getValueType(OutVT)); | |||
47493 | return truncateVectorWithPACK(X86ISD::PACKSS, OutVT, In, DL, DAG, Subtarget); | |||
47494 | } | |||
47495 | ||||
47496 | /// This function transforms truncation from vXi32/vXi64 to vXi8/vXi16 into | |||
47497 | /// X86ISD::PACKUS/X86ISD::PACKSS operations. We do it here because after type | |||
47498 | /// legalization the truncation will be translated into a BUILD_VECTOR with each | |||
47499 | /// element that is extracted from a vector and then truncated, and it is | |||
47500 | /// difficult to do this optimization based on them. | |||
47501 | static SDValue combineVectorTruncation(SDNode *N, SelectionDAG &DAG, | |||
47502 | const X86Subtarget &Subtarget) { | |||
47503 | EVT OutVT = N->getValueType(0); | |||
47504 | if (!OutVT.isVector()) | |||
47505 | return SDValue(); | |||
47506 | ||||
47507 | SDValue In = N->getOperand(0); | |||
47508 | if (!In.getValueType().isSimple()) | |||
47509 | return SDValue(); | |||
47510 | ||||
47511 | EVT InVT = In.getValueType(); | |||
47512 | unsigned NumElems = OutVT.getVectorNumElements(); | |||
47513 | ||||
47514 | // AVX512 provides fast truncate ops. | |||
47515 | if (!Subtarget.hasSSE2() || Subtarget.hasAVX512()) | |||
47516 | return SDValue(); | |||
47517 | ||||
47518 | EVT OutSVT = OutVT.getVectorElementType(); | |||
47519 | EVT InSVT = InVT.getVectorElementType(); | |||
47520 | if (!((InSVT == MVT::i16 || InSVT == MVT::i32 || InSVT == MVT::i64) && | |||
47521 | (OutSVT == MVT::i8 || OutSVT == MVT::i16) && isPowerOf2_32(NumElems) && | |||
47522 | NumElems >= 8)) | |||
47523 | return SDValue(); | |||
47524 | ||||
47525 | // SSSE3's pshufb results in less instructions in the cases below. | |||
47526 | if (Subtarget.hasSSSE3() && NumElems == 8 && InSVT != MVT::i64) | |||
47527 | return SDValue(); | |||
47528 | ||||
47529 | SDLoc DL(N); | |||
47530 | // SSE2 provides PACKUS for only 2 x v8i16 -> v16i8 and SSE4.1 provides PACKUS | |||
47531 | // for 2 x v4i32 -> v8i16. For SSSE3 and below, we need to use PACKSS to | |||
47532 | // truncate 2 x v4i32 to v8i16. | |||
47533 | if (Subtarget.hasSSE41() || OutSVT == MVT::i8) | |||
47534 | return combineVectorTruncationWithPACKUS(N, DL, Subtarget, DAG); | |||
47535 | if (InSVT == MVT::i32) | |||
47536 | return combineVectorTruncationWithPACKSS(N, DL, Subtarget, DAG); | |||
47537 | ||||
47538 | return SDValue(); | |||
47539 | } | |||
47540 | ||||
47541 | /// This function transforms vector truncation of 'extended sign-bits' or | |||
47542 | /// 'extended zero-bits' values. | |||
47543 | /// vXi16/vXi32/vXi64 to vXi8/vXi16/vXi32 into X86ISD::PACKSS/PACKUS operations. | |||
47544 | static SDValue combineVectorSignBitsTruncation(SDNode *N, const SDLoc &DL, | |||
47545 | SelectionDAG &DAG, | |||
47546 | const X86Subtarget &Subtarget) { | |||
47547 | // Requires SSE2. | |||
47548 | if (!Subtarget.hasSSE2()) | |||
47549 | return SDValue(); | |||
47550 | ||||
47551 | if (!N->getValueType(0).isVector() || !N->getValueType(0).isSimple()) | |||
47552 | return SDValue(); | |||
47553 | ||||
47554 | SDValue In = N->getOperand(0); | |||
47555 | if (!In.getValueType().isSimple()) | |||
47556 | return SDValue(); | |||
47557 | ||||
47558 | MVT VT = N->getValueType(0).getSimpleVT(); | |||
47559 | MVT SVT = VT.getScalarType(); | |||
47560 | ||||
47561 | MVT InVT = In.getValueType().getSimpleVT(); | |||
47562 | MVT InSVT = InVT.getScalarType(); | |||
47563 | ||||
47564 | // Check we have a truncation suited for PACKSS/PACKUS. | |||
47565 | if (!isPowerOf2_32(VT.getVectorNumElements())) | |||
47566 | return SDValue(); | |||
47567 | if (SVT != MVT::i8 && SVT != MVT::i16 && SVT != MVT::i32) | |||
47568 | return SDValue(); | |||
47569 | if (InSVT != MVT::i16 && InSVT != MVT::i32 && InSVT != MVT::i64) | |||
47570 | return SDValue(); | |||
47571 | ||||
47572 | // Truncation to sub-128bit vXi32 can be better handled with shuffles. | |||
47573 | if (SVT == MVT::i32 && VT.getSizeInBits() < 128) | |||
47574 | return SDValue(); | |||
47575 | ||||
47576 | // AVX512 has fast truncate, but if the input is already going to be split, | |||
47577 | // there's no harm in trying pack. | |||
47578 | if (Subtarget.hasAVX512() && | |||
47579 | !(!Subtarget.useAVX512Regs() && VT.is256BitVector() && | |||
47580 | InVT.is512BitVector())) { | |||
47581 | // PACK should still be worth it for 128-bit vectors if the sources were | |||
47582 | // originally concatenated from subvectors. | |||
47583 | SmallVector<SDValue> ConcatOps; | |||
47584 | if (VT.getSizeInBits() > 128 || !collectConcatOps(In.getNode(), ConcatOps)) | |||
47585 | return SDValue(); | |||
47586 | } | |||
47587 | ||||
47588 | unsigned NumPackedSignBits = std::min<unsigned>(SVT.getSizeInBits(), 16); | |||
47589 | unsigned NumPackedZeroBits = Subtarget.hasSSE41() ? NumPackedSignBits : 8; | |||
47590 | ||||
47591 | // Use PACKUS if the input has zero-bits that extend all the way to the | |||
47592 | // packed/truncated value. e.g. masks, zext_in_reg, etc. | |||
47593 | KnownBits Known = DAG.computeKnownBits(In); | |||
47594 | unsigned NumLeadingZeroBits = Known.countMinLeadingZeros(); | |||
47595 | if (NumLeadingZeroBits >= (InSVT.getSizeInBits() - NumPackedZeroBits)) | |||
47596 | return truncateVectorWithPACK(X86ISD::PACKUS, VT, In, DL, DAG, Subtarget); | |||
47597 | ||||
47598 | // Use PACKSS if the input has sign-bits that extend all the way to the | |||
47599 | // packed/truncated value. e.g. Comparison result, sext_in_reg, etc. | |||
47600 | unsigned NumSignBits = DAG.ComputeNumSignBits(In); | |||
47601 | ||||
47602 | // Don't use PACKSS for vXi64 -> vXi32 truncations unless we're dealing with | |||
47603 | // a sign splat. ComputeNumSignBits struggles to see through BITCASTs later | |||
47604 | // on and combines/simplifications can't then use it. | |||
47605 | if (SVT == MVT::i32 && NumSignBits != InSVT.getSizeInBits()) | |||
47606 | return SDValue(); | |||
47607 | ||||
47608 | unsigned MinSignBits = InSVT.getSizeInBits() - NumPackedSignBits; | |||
47609 | if (NumSignBits > MinSignBits) | |||
47610 | return truncateVectorWithPACK(X86ISD::PACKSS, VT, In, DL, DAG, Subtarget); | |||
47611 | ||||
47612 | // If we have a srl that only generates signbits that we will discard in | |||
47613 | // the truncation then we can use PACKSS by converting the srl to a sra. | |||
47614 | // SimplifyDemandedBits often relaxes sra to srl so we need to reverse it. | |||
47615 | if (In.getOpcode() == ISD::SRL && N->isOnlyUserOf(In.getNode())) | |||
47616 | if (const APInt *ShAmt = DAG.getValidShiftAmountConstant( | |||
47617 | In, APInt::getAllOnesValue(VT.getVectorNumElements()))) { | |||
47618 | if (*ShAmt == MinSignBits) { | |||
47619 | SDValue NewIn = DAG.getNode(ISD::SRA, DL, InVT, In->ops()); | |||
47620 | return truncateVectorWithPACK(X86ISD::PACKSS, VT, NewIn, DL, DAG, | |||
47621 | Subtarget); | |||
47622 | } | |||
47623 | } | |||
47624 | ||||
47625 | return SDValue(); | |||
47626 | } | |||
47627 | ||||
47628 | // Try to form a MULHU or MULHS node by looking for | |||
47629 | // (trunc (srl (mul ext, ext), 16)) | |||
47630 | // TODO: This is X86 specific because we want to be able to handle wide types | |||
47631 | // before type legalization. But we can only do it if the vector will be | |||
47632 | // legalized via widening/splitting. Type legalization can't handle promotion | |||
47633 | // of a MULHU/MULHS. There isn't a way to convey this to the generic DAG | |||
47634 | // combiner. | |||
47635 | static SDValue combinePMULH(SDValue Src, EVT VT, const SDLoc &DL, | |||
47636 | SelectionDAG &DAG, const X86Subtarget &Subtarget) { | |||
47637 | // First instruction should be a right shift of a multiply. | |||
47638 | if (Src.getOpcode() != ISD::SRL || | |||
47639 | Src.getOperand(0).getOpcode() != ISD::MUL) | |||
47640 | return SDValue(); | |||
47641 | ||||
47642 | if (!Subtarget.hasSSE2()) | |||
47643 | return SDValue(); | |||
47644 | ||||
47645 | // Only handle vXi16 types that are at least 128-bits unless they will be | |||
47646 | // widened. | |||
47647 | if (!VT.isVector() || VT.getVectorElementType() != MVT::i16) | |||
47648 | return SDValue(); | |||
47649 | ||||
47650 | // Input type should be at least vXi32. | |||
47651 | EVT InVT = Src.getValueType(); | |||
47652 | if (InVT.getVectorElementType().getSizeInBits() < 32) | |||
47653 | return SDValue(); | |||
47654 | ||||
47655 | // Need a shift by 16. | |||
47656 | APInt ShiftAmt; | |||
47657 | if (!ISD::isConstantSplatVector(Src.getOperand(1).getNode(), ShiftAmt) || | |||
47658 | ShiftAmt != 16) | |||
47659 | return SDValue(); | |||
47660 | ||||
47661 | SDValue LHS = Src.getOperand(0).getOperand(0); | |||
47662 | SDValue RHS = Src.getOperand(0).getOperand(1); | |||
47663 | ||||
47664 | unsigned ExtOpc = LHS.getOpcode(); | |||
47665 | if ((ExtOpc != ISD::SIGN_EXTEND && ExtOpc != ISD::ZERO_EXTEND) || | |||
47666 | RHS.getOpcode() != ExtOpc) | |||
47667 | return SDValue(); | |||
47668 | ||||
47669 | // Peek through the extends. | |||
47670 | LHS = LHS.getOperand(0); | |||
47671 | RHS = RHS.getOperand(0); | |||
47672 | ||||
47673 | // Ensure the input types match. | |||
47674 | if (LHS.getValueType() != VT || RHS.getValueType() != VT) | |||
47675 | return SDValue(); | |||
47676 | ||||
47677 | unsigned Opc = ExtOpc == ISD::SIGN_EXTEND ? ISD::MULHS : ISD::MULHU; | |||
47678 | return DAG.getNode(Opc, DL, VT, LHS, RHS); | |||
47679 | } | |||
47680 | ||||
47681 | // Attempt to match PMADDUBSW, which multiplies corresponding unsigned bytes | |||
47682 | // from one vector with signed bytes from another vector, adds together | |||
47683 | // adjacent pairs of 16-bit products, and saturates the result before | |||
47684 | // truncating to 16-bits. | |||
47685 | // | |||
47686 | // Which looks something like this: | |||
47687 | // (i16 (ssat (add (mul (zext (even elts (i8 A))), (sext (even elts (i8 B)))), | |||
47688 | // (mul (zext (odd elts (i8 A)), (sext (odd elts (i8 B)))))))) | |||
47689 | static SDValue detectPMADDUBSW(SDValue In, EVT VT, SelectionDAG &DAG, | |||
47690 | const X86Subtarget &Subtarget, | |||
47691 | const SDLoc &DL) { | |||
47692 | if (!VT.isVector() || !Subtarget.hasSSSE3()) | |||
47693 | return SDValue(); | |||
47694 | ||||
47695 | unsigned NumElems = VT.getVectorNumElements(); | |||
47696 | EVT ScalarVT = VT.getVectorElementType(); | |||
47697 | if (ScalarVT != MVT::i16 || NumElems < 8 || !isPowerOf2_32(NumElems)) | |||
47698 | return SDValue(); | |||
47699 | ||||
47700 | SDValue SSatVal = detectSSatPattern(In, VT); | |||
47701 | if (!SSatVal || SSatVal.getOpcode() != ISD::ADD) | |||
47702 | return SDValue(); | |||
47703 | ||||
47704 | // Ok this is a signed saturation of an ADD. See if this ADD is adding pairs | |||
47705 | // of multiplies from even/odd elements. | |||
47706 | SDValue N0 = SSatVal.getOperand(0); | |||
47707 | SDValue N1 = SSatVal.getOperand(1); | |||
47708 | ||||
47709 | if (N0.getOpcode() != ISD::MUL || N1.getOpcode() != ISD::MUL) | |||
47710 | return SDValue(); | |||
47711 | ||||
47712 | SDValue N00 = N0.getOperand(0); | |||
47713 | SDValue N01 = N0.getOperand(1); | |||
47714 | SDValue N10 = N1.getOperand(0); | |||
47715 | SDValue N11 = N1.getOperand(1); | |||
47716 | ||||
47717 | // TODO: Handle constant vectors and use knownbits/computenumsignbits? | |||
47718 | // Canonicalize zero_extend to LHS. | |||
47719 | if (N01.getOpcode() == ISD::ZERO_EXTEND) | |||
47720 | std::swap(N00, N01); | |||
47721 | if (N11.getOpcode() == ISD::ZERO_EXTEND) | |||
47722 | std::swap(N10, N11); | |||
47723 | ||||
47724 | // Ensure we have a zero_extend and a sign_extend. | |||
47725 | if (N00.getOpcode() != ISD::ZERO_EXTEND || | |||
47726 | N01.getOpcode() != ISD::SIGN_EXTEND || | |||
47727 | N10.getOpcode() != ISD::ZERO_EXTEND || | |||
47728 | N11.getOpcode() != ISD::SIGN_EXTEND) | |||
47729 | return SDValue(); | |||
47730 | ||||
47731 | // Peek through the extends. | |||
47732 | N00 = N00.getOperand(0); | |||
47733 | N01 = N01.getOperand(0); | |||
47734 | N10 = N10.getOperand(0); | |||
47735 | N11 = N11.getOperand(0); | |||
47736 | ||||
47737 | // Ensure the extend is from vXi8. | |||
47738 | if (N00.getValueType().getVectorElementType() != MVT::i8 || | |||
47739 | N01.getValueType().getVectorElementType() != MVT::i8 || | |||
47740 | N10.getValueType().getVectorElementType() != MVT::i8 || | |||
47741 | N11.getValueType().getVectorElementType() != MVT::i8) | |||
47742 | return SDValue(); | |||
47743 | ||||
47744 | // All inputs should be build_vectors. | |||
47745 | if (N00.getOpcode() != ISD::BUILD_VECTOR || | |||
47746 | N01.getOpcode() != ISD::BUILD_VECTOR || | |||
47747 | N10.getOpcode() != ISD::BUILD_VECTOR || | |||
47748 | N11.getOpcode() != ISD::BUILD_VECTOR) | |||
47749 | return SDValue(); | |||
47750 | ||||
47751 | // N00/N10 are zero extended. N01/N11 are sign extended. | |||
47752 | ||||
47753 | // For each element, we need to ensure we have an odd element from one vector | |||
47754 | // multiplied by the odd element of another vector and the even element from | |||
47755 | // one of the same vectors being multiplied by the even element from the | |||
47756 | // other vector. So we need to make sure for each element i, this operator | |||
47757 | // is being performed: | |||
47758 | // A[2 * i] * B[2 * i] + A[2 * i + 1] * B[2 * i + 1] | |||
47759 | SDValue ZExtIn, SExtIn; | |||
47760 | for (unsigned i = 0; i != NumElems; ++i) { | |||
47761 | SDValue N00Elt = N00.getOperand(i); | |||
47762 | SDValue N01Elt = N01.getOperand(i); | |||
47763 | SDValue N10Elt = N10.getOperand(i); | |||
47764 | SDValue N11Elt = N11.getOperand(i); | |||
47765 | // TODO: Be more tolerant to undefs. | |||
47766 | if (N00Elt.getOpcode() != ISD::EXTRACT_VECTOR_ELT || | |||
47767 | N01Elt.getOpcode() != ISD::EXTRACT_VECTOR_ELT || | |||
47768 | N10Elt.getOpcode() != ISD::EXTRACT_VECTOR_ELT || | |||
47769 | N11Elt.getOpcode() != ISD::EXTRACT_VECTOR_ELT) | |||
47770 | return SDValue(); | |||
47771 | auto *ConstN00Elt = dyn_cast<ConstantSDNode>(N00Elt.getOperand(1)); | |||
47772 | auto *ConstN01Elt = dyn_cast<ConstantSDNode>(N01Elt.getOperand(1)); | |||
47773 | auto *ConstN10Elt = dyn_cast<ConstantSDNode>(N10Elt.getOperand(1)); | |||
47774 | auto *ConstN11Elt = dyn_cast<ConstantSDNode>(N11Elt.getOperand(1)); | |||
47775 | if (!ConstN00Elt || !ConstN01Elt || !ConstN10Elt || !ConstN11Elt) | |||
47776 | return SDValue(); | |||
47777 | unsigned IdxN00 = ConstN00Elt->getZExtValue(); | |||
47778 | unsigned IdxN01 = ConstN01Elt->getZExtValue(); | |||
47779 | unsigned IdxN10 = ConstN10Elt->getZExtValue(); | |||
47780 | unsigned IdxN11 = ConstN11Elt->getZExtValue(); | |||
47781 | // Add is commutative so indices can be reordered. | |||
47782 | if (IdxN00 > IdxN10) { | |||
47783 | std::swap(IdxN00, IdxN10); | |||
47784 | std::swap(IdxN01, IdxN11); | |||
47785 | } | |||
47786 | // N0 indices be the even element. N1 indices must be the next odd element. | |||
47787 | if (IdxN00 != 2 * i || IdxN10 != 2 * i + 1 || | |||
47788 | IdxN01 != 2 * i || IdxN11 != 2 * i + 1) | |||
47789 | return SDValue(); | |||
47790 | SDValue N00In = N00Elt.getOperand(0); | |||
47791 | SDValue N01In = N01Elt.getOperand(0); | |||
47792 | SDValue N10In = N10Elt.getOperand(0); | |||
47793 | SDValue N11In = N11Elt.getOperand(0); | |||
47794 | // First time we find an input capture it. | |||
47795 | if (!ZExtIn) { | |||
47796 | ZExtIn = N00In; | |||
47797 | SExtIn = N01In; | |||
47798 | } | |||
47799 | if (ZExtIn != N00In || SExtIn != N01In || | |||
47800 | ZExtIn != N10In || SExtIn != N11In) | |||
47801 | return SDValue(); | |||
47802 | } | |||
47803 | ||||
47804 | auto PMADDBuilder = [](SelectionDAG &DAG, const SDLoc &DL, | |||
47805 | ArrayRef<SDValue> Ops) { | |||
47806 | // Shrink by adding truncate nodes and let DAGCombine fold with the | |||
47807 | // sources. | |||
47808 | EVT InVT = Ops[0].getValueType(); | |||
47809 | assert(InVT.getScalarType() == MVT::i8 &&(static_cast <bool> (InVT.getScalarType() == MVT::i8 && "Unexpected scalar element type") ? void (0) : __assert_fail ("InVT.getScalarType() == MVT::i8 && \"Unexpected scalar element type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 47810, __extension__ __PRETTY_FUNCTION__)) | |||
47810 | "Unexpected scalar element type")(static_cast <bool> (InVT.getScalarType() == MVT::i8 && "Unexpected scalar element type") ? void (0) : __assert_fail ("InVT.getScalarType() == MVT::i8 && \"Unexpected scalar element type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 47810, __extension__ __PRETTY_FUNCTION__)); | |||
47811 | assert(InVT == Ops[1].getValueType() && "Operands' types mismatch")(static_cast <bool> (InVT == Ops[1].getValueType() && "Operands' types mismatch") ? void (0) : __assert_fail ("InVT == Ops[1].getValueType() && \"Operands' types mismatch\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 47811, __extension__ __PRETTY_FUNCTION__)); | |||
47812 | EVT ResVT = EVT::getVectorVT(*DAG.getContext(), MVT::i16, | |||
47813 | InVT.getVectorNumElements() / 2); | |||
47814 | return DAG.getNode(X86ISD::VPMADDUBSW, DL, ResVT, Ops[0], Ops[1]); | |||
47815 | }; | |||
47816 | return SplitOpsAndApply(DAG, Subtarget, DL, VT, { ZExtIn, SExtIn }, | |||
47817 | PMADDBuilder); | |||
47818 | } | |||
47819 | ||||
47820 | static SDValue combineTruncate(SDNode *N, SelectionDAG &DAG, | |||
47821 | const X86Subtarget &Subtarget) { | |||
47822 | EVT VT = N->getValueType(0); | |||
47823 | SDValue Src = N->getOperand(0); | |||
47824 | SDLoc DL(N); | |||
47825 | ||||
47826 | // Attempt to pre-truncate inputs to arithmetic ops instead. | |||
47827 | if (SDValue V = combineTruncatedArithmetic(N, DAG, Subtarget, DL)) | |||
47828 | return V; | |||
47829 | ||||
47830 | // Try to detect AVG pattern first. | |||
47831 | if (SDValue Avg = detectAVGPattern(Src, VT, DAG, Subtarget, DL)) | |||
47832 | return Avg; | |||
47833 | ||||
47834 | // Try to detect PMADD | |||
47835 | if (SDValue PMAdd = detectPMADDUBSW(Src, VT, DAG, Subtarget, DL)) | |||
47836 | return PMAdd; | |||
47837 | ||||
47838 | // Try to combine truncation with signed/unsigned saturation. | |||
47839 | if (SDValue Val = combineTruncateWithSat(Src, VT, DL, DAG, Subtarget)) | |||
47840 | return Val; | |||
47841 | ||||
47842 | // Try to combine PMULHUW/PMULHW for vXi16. | |||
47843 | if (SDValue V = combinePMULH(Src, VT, DL, DAG, Subtarget)) | |||
47844 | return V; | |||
47845 | ||||
47846 | // The bitcast source is a direct mmx result. | |||
47847 | // Detect bitcasts between i32 to x86mmx | |||
47848 | if (Src.getOpcode() == ISD::BITCAST && VT == MVT::i32) { | |||
47849 | SDValue BCSrc = Src.getOperand(0); | |||
47850 | if (BCSrc.getValueType() == MVT::x86mmx) | |||
47851 | return DAG.getNode(X86ISD::MMX_MOVD2W, DL, MVT::i32, BCSrc); | |||
47852 | } | |||
47853 | ||||
47854 | // Try to truncate extended sign/zero bits with PACKSS/PACKUS. | |||
47855 | if (SDValue V = combineVectorSignBitsTruncation(N, DL, DAG, Subtarget)) | |||
47856 | return V; | |||
47857 | ||||
47858 | return combineVectorTruncation(N, DAG, Subtarget); | |||
47859 | } | |||
47860 | ||||
47861 | static SDValue combineVTRUNC(SDNode *N, SelectionDAG &DAG, | |||
47862 | TargetLowering::DAGCombinerInfo &DCI) { | |||
47863 | EVT VT = N->getValueType(0); | |||
47864 | SDValue In = N->getOperand(0); | |||
47865 | SDLoc DL(N); | |||
47866 | ||||
47867 | if (auto SSatVal = detectSSatPattern(In, VT)) | |||
47868 | return DAG.getNode(X86ISD::VTRUNCS, DL, VT, SSatVal); | |||
47869 | if (auto USatVal = detectUSatPattern(In, VT, DAG, DL)) | |||
47870 | return DAG.getNode(X86ISD::VTRUNCUS, DL, VT, USatVal); | |||
47871 | ||||
47872 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
47873 | APInt DemandedMask(APInt::getAllOnesValue(VT.getScalarSizeInBits())); | |||
47874 | if (TLI.SimplifyDemandedBits(SDValue(N, 0), DemandedMask, DCI)) | |||
47875 | return SDValue(N, 0); | |||
47876 | ||||
47877 | return SDValue(); | |||
47878 | } | |||
47879 | ||||
47880 | /// Returns the negated value if the node \p N flips sign of FP value. | |||
47881 | /// | |||
47882 | /// FP-negation node may have different forms: FNEG(x), FXOR (x, 0x80000000) | |||
47883 | /// or FSUB(0, x) | |||
47884 | /// AVX512F does not have FXOR, so FNEG is lowered as | |||
47885 | /// (bitcast (xor (bitcast x), (bitcast ConstantFP(0x80000000)))). | |||
47886 | /// In this case we go though all bitcasts. | |||
47887 | /// This also recognizes splat of a negated value and returns the splat of that | |||
47888 | /// value. | |||
47889 | static SDValue isFNEG(SelectionDAG &DAG, SDNode *N, unsigned Depth = 0) { | |||
47890 | if (N->getOpcode() == ISD::FNEG) | |||
47891 | return N->getOperand(0); | |||
47892 | ||||
47893 | // Don't recurse exponentially. | |||
47894 | if (Depth > SelectionDAG::MaxRecursionDepth) | |||
47895 | return SDValue(); | |||
47896 | ||||
47897 | unsigned ScalarSize = N->getValueType(0).getScalarSizeInBits(); | |||
47898 | ||||
47899 | SDValue Op = peekThroughBitcasts(SDValue(N, 0)); | |||
47900 | EVT VT = Op->getValueType(0); | |||
47901 | ||||
47902 | // Make sure the element size doesn't change. | |||
47903 | if (VT.getScalarSizeInBits() != ScalarSize) | |||
47904 | return SDValue(); | |||
47905 | ||||
47906 | unsigned Opc = Op.getOpcode(); | |||
47907 | switch (Opc) { | |||
47908 | case ISD::VECTOR_SHUFFLE: { | |||
47909 | // For a VECTOR_SHUFFLE(VEC1, VEC2), if the VEC2 is undef, then the negate | |||
47910 | // of this is VECTOR_SHUFFLE(-VEC1, UNDEF). The mask can be anything here. | |||
47911 | if (!Op.getOperand(1).isUndef()) | |||
47912 | return SDValue(); | |||
47913 | if (SDValue NegOp0 = isFNEG(DAG, Op.getOperand(0).getNode(), Depth + 1)) | |||
47914 | if (NegOp0.getValueType() == VT) // FIXME: Can we do better? | |||
47915 | return DAG.getVectorShuffle(VT, SDLoc(Op), NegOp0, DAG.getUNDEF(VT), | |||
47916 | cast<ShuffleVectorSDNode>(Op)->getMask()); | |||
47917 | break; | |||
47918 | } | |||
47919 | case ISD::INSERT_VECTOR_ELT: { | |||
47920 | // Negate of INSERT_VECTOR_ELT(UNDEF, V, INDEX) is INSERT_VECTOR_ELT(UNDEF, | |||
47921 | // -V, INDEX). | |||
47922 | SDValue InsVector = Op.getOperand(0); | |||
47923 | SDValue InsVal = Op.getOperand(1); | |||
47924 | if (!InsVector.isUndef()) | |||
47925 | return SDValue(); | |||
47926 | if (SDValue NegInsVal = isFNEG(DAG, InsVal.getNode(), Depth + 1)) | |||
47927 | if (NegInsVal.getValueType() == VT.getVectorElementType()) // FIXME | |||
47928 | return DAG.getNode(ISD::INSERT_VECTOR_ELT, SDLoc(Op), VT, InsVector, | |||
47929 | NegInsVal, Op.getOperand(2)); | |||
47930 | break; | |||
47931 | } | |||
47932 | case ISD::FSUB: | |||
47933 | case ISD::XOR: | |||
47934 | case X86ISD::FXOR: { | |||
47935 | SDValue Op1 = Op.getOperand(1); | |||
47936 | SDValue Op0 = Op.getOperand(0); | |||
47937 | ||||
47938 | // For XOR and FXOR, we want to check if constant | |||
47939 | // bits of Op1 are sign bit masks. For FSUB, we | |||
47940 | // have to check if constant bits of Op0 are sign | |||
47941 | // bit masks and hence we swap the operands. | |||
47942 | if (Opc == ISD::FSUB) | |||
47943 | std::swap(Op0, Op1); | |||
47944 | ||||
47945 | APInt UndefElts; | |||
47946 | SmallVector<APInt, 16> EltBits; | |||
47947 | // Extract constant bits and see if they are all | |||
47948 | // sign bit masks. Ignore the undef elements. | |||
47949 | if (getTargetConstantBitsFromNode(Op1, ScalarSize, UndefElts, EltBits, | |||
47950 | /* AllowWholeUndefs */ true, | |||
47951 | /* AllowPartialUndefs */ false)) { | |||
47952 | for (unsigned I = 0, E = EltBits.size(); I < E; I++) | |||
47953 | if (!UndefElts[I] && !EltBits[I].isSignMask()) | |||
47954 | return SDValue(); | |||
47955 | ||||
47956 | return peekThroughBitcasts(Op0); | |||
47957 | } | |||
47958 | } | |||
47959 | } | |||
47960 | ||||
47961 | return SDValue(); | |||
47962 | } | |||
47963 | ||||
47964 | static unsigned negateFMAOpcode(unsigned Opcode, bool NegMul, bool NegAcc, | |||
47965 | bool NegRes) { | |||
47966 | if (NegMul) { | |||
47967 | switch (Opcode) { | |||
47968 | default: llvm_unreachable("Unexpected opcode")::llvm::llvm_unreachable_internal("Unexpected opcode", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 47968); | |||
47969 | case ISD::FMA: Opcode = X86ISD::FNMADD; break; | |||
47970 | case ISD::STRICT_FMA: Opcode = X86ISD::STRICT_FNMADD; break; | |||
47971 | case X86ISD::FMADD_RND: Opcode = X86ISD::FNMADD_RND; break; | |||
47972 | case X86ISD::FMSUB: Opcode = X86ISD::FNMSUB; break; | |||
47973 | case X86ISD::STRICT_FMSUB: Opcode = X86ISD::STRICT_FNMSUB; break; | |||
47974 | case X86ISD::FMSUB_RND: Opcode = X86ISD::FNMSUB_RND; break; | |||
47975 | case X86ISD::FNMADD: Opcode = ISD::FMA; break; | |||
47976 | case X86ISD::STRICT_FNMADD: Opcode = ISD::STRICT_FMA; break; | |||
47977 | case X86ISD::FNMADD_RND: Opcode = X86ISD::FMADD_RND; break; | |||
47978 | case X86ISD::FNMSUB: Opcode = X86ISD::FMSUB; break; | |||
47979 | case X86ISD::STRICT_FNMSUB: Opcode = X86ISD::STRICT_FMSUB; break; | |||
47980 | case X86ISD::FNMSUB_RND: Opcode = X86ISD::FMSUB_RND; break; | |||
47981 | } | |||
47982 | } | |||
47983 | ||||
47984 | if (NegAcc) { | |||
47985 | switch (Opcode) { | |||
47986 | default: llvm_unreachable("Unexpected opcode")::llvm::llvm_unreachable_internal("Unexpected opcode", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 47986); | |||
47987 | case ISD::FMA: Opcode = X86ISD::FMSUB; break; | |||
47988 | case ISD::STRICT_FMA: Opcode = X86ISD::STRICT_FMSUB; break; | |||
47989 | case X86ISD::FMADD_RND: Opcode = X86ISD::FMSUB_RND; break; | |||
47990 | case X86ISD::FMSUB: Opcode = ISD::FMA; break; | |||
47991 | case X86ISD::STRICT_FMSUB: Opcode = ISD::STRICT_FMA; break; | |||
47992 | case X86ISD::FMSUB_RND: Opcode = X86ISD::FMADD_RND; break; | |||
47993 | case X86ISD::FNMADD: Opcode = X86ISD::FNMSUB; break; | |||
47994 | case X86ISD::STRICT_FNMADD: Opcode = X86ISD::STRICT_FNMSUB; break; | |||
47995 | case X86ISD::FNMADD_RND: Opcode = X86ISD::FNMSUB_RND; break; | |||
47996 | case X86ISD::FNMSUB: Opcode = X86ISD::FNMADD; break; | |||
47997 | case X86ISD::STRICT_FNMSUB: Opcode = X86ISD::STRICT_FNMADD; break; | |||
47998 | case X86ISD::FNMSUB_RND: Opcode = X86ISD::FNMADD_RND; break; | |||
47999 | case X86ISD::FMADDSUB: Opcode = X86ISD::FMSUBADD; break; | |||
48000 | case X86ISD::FMADDSUB_RND: Opcode = X86ISD::FMSUBADD_RND; break; | |||
48001 | case X86ISD::FMSUBADD: Opcode = X86ISD::FMADDSUB; break; | |||
48002 | case X86ISD::FMSUBADD_RND: Opcode = X86ISD::FMADDSUB_RND; break; | |||
48003 | } | |||
48004 | } | |||
48005 | ||||
48006 | if (NegRes) { | |||
48007 | switch (Opcode) { | |||
48008 | // For accuracy reason, we never combine fneg and fma under strict FP. | |||
48009 | default: llvm_unreachable("Unexpected opcode")::llvm::llvm_unreachable_internal("Unexpected opcode", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 48009); | |||
48010 | case ISD::FMA: Opcode = X86ISD::FNMSUB; break; | |||
48011 | case X86ISD::FMADD_RND: Opcode = X86ISD::FNMSUB_RND; break; | |||
48012 | case X86ISD::FMSUB: Opcode = X86ISD::FNMADD; break; | |||
48013 | case X86ISD::FMSUB_RND: Opcode = X86ISD::FNMADD_RND; break; | |||
48014 | case X86ISD::FNMADD: Opcode = X86ISD::FMSUB; break; | |||
48015 | case X86ISD::FNMADD_RND: Opcode = X86ISD::FMSUB_RND; break; | |||
48016 | case X86ISD::FNMSUB: Opcode = ISD::FMA; break; | |||
48017 | case X86ISD::FNMSUB_RND: Opcode = X86ISD::FMADD_RND; break; | |||
48018 | } | |||
48019 | } | |||
48020 | ||||
48021 | return Opcode; | |||
48022 | } | |||
48023 | ||||
48024 | /// Do target-specific dag combines on floating point negations. | |||
48025 | static SDValue combineFneg(SDNode *N, SelectionDAG &DAG, | |||
48026 | TargetLowering::DAGCombinerInfo &DCI, | |||
48027 | const X86Subtarget &Subtarget) { | |||
48028 | EVT OrigVT = N->getValueType(0); | |||
48029 | SDValue Arg = isFNEG(DAG, N); | |||
48030 | if (!Arg) | |||
48031 | return SDValue(); | |||
48032 | ||||
48033 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
48034 | EVT VT = Arg.getValueType(); | |||
48035 | EVT SVT = VT.getScalarType(); | |||
48036 | SDLoc DL(N); | |||
48037 | ||||
48038 | // Let legalize expand this if it isn't a legal type yet. | |||
48039 | if (!TLI.isTypeLegal(VT)) | |||
48040 | return SDValue(); | |||
48041 | ||||
48042 | // If we're negating a FMUL node on a target with FMA, then we can avoid the | |||
48043 | // use of a constant by performing (-0 - A*B) instead. | |||
48044 | // FIXME: Check rounding control flags as well once it becomes available. | |||
48045 | if (Arg.getOpcode() == ISD::FMUL && (SVT == MVT::f32 || SVT == MVT::f64) && | |||
48046 | Arg->getFlags().hasNoSignedZeros() && Subtarget.hasAnyFMA()) { | |||
48047 | SDValue Zero = DAG.getConstantFP(0.0, DL, VT); | |||
48048 | SDValue NewNode = DAG.getNode(X86ISD::FNMSUB, DL, VT, Arg.getOperand(0), | |||
48049 | Arg.getOperand(1), Zero); | |||
48050 | return DAG.getBitcast(OrigVT, NewNode); | |||
48051 | } | |||
48052 | ||||
48053 | bool CodeSize = DAG.getMachineFunction().getFunction().hasOptSize(); | |||
48054 | bool LegalOperations = !DCI.isBeforeLegalizeOps(); | |||
48055 | if (SDValue NegArg = | |||
48056 | TLI.getNegatedExpression(Arg, DAG, LegalOperations, CodeSize)) | |||
48057 | return DAG.getBitcast(OrigVT, NegArg); | |||
48058 | ||||
48059 | return SDValue(); | |||
48060 | } | |||
48061 | ||||
48062 | SDValue X86TargetLowering::getNegatedExpression(SDValue Op, SelectionDAG &DAG, | |||
48063 | bool LegalOperations, | |||
48064 | bool ForCodeSize, | |||
48065 | NegatibleCost &Cost, | |||
48066 | unsigned Depth) const { | |||
48067 | // fneg patterns are removable even if they have multiple uses. | |||
48068 | if (SDValue Arg = isFNEG(DAG, Op.getNode(), Depth)) { | |||
48069 | Cost = NegatibleCost::Cheaper; | |||
48070 | return DAG.getBitcast(Op.getValueType(), Arg); | |||
48071 | } | |||
48072 | ||||
48073 | EVT VT = Op.getValueType(); | |||
48074 | EVT SVT = VT.getScalarType(); | |||
48075 | unsigned Opc = Op.getOpcode(); | |||
48076 | SDNodeFlags Flags = Op.getNode()->getFlags(); | |||
48077 | switch (Opc) { | |||
48078 | case ISD::FMA: | |||
48079 | case X86ISD::FMSUB: | |||
48080 | case X86ISD::FNMADD: | |||
48081 | case X86ISD::FNMSUB: | |||
48082 | case X86ISD::FMADD_RND: | |||
48083 | case X86ISD::FMSUB_RND: | |||
48084 | case X86ISD::FNMADD_RND: | |||
48085 | case X86ISD::FNMSUB_RND: { | |||
48086 | if (!Op.hasOneUse() || !Subtarget.hasAnyFMA() || !isTypeLegal(VT) || | |||
48087 | !(SVT == MVT::f32 || SVT == MVT::f64) || | |||
48088 | !isOperationLegal(ISD::FMA, VT)) | |||
48089 | break; | |||
48090 | ||||
48091 | // Don't fold (fneg (fma (fneg x), y, (fneg z))) to (fma x, y, z) | |||
48092 | // if it may have signed zeros. | |||
48093 | if (!Flags.hasNoSignedZeros()) | |||
48094 | break; | |||
48095 | ||||
48096 | // This is always negatible for free but we might be able to remove some | |||
48097 | // extra operand negations as well. | |||
48098 | SmallVector<SDValue, 4> NewOps(Op.getNumOperands(), SDValue()); | |||
48099 | for (int i = 0; i != 3; ++i) | |||
48100 | NewOps[i] = getCheaperNegatedExpression( | |||
48101 | Op.getOperand(i), DAG, LegalOperations, ForCodeSize, Depth + 1); | |||
48102 | ||||
48103 | bool NegA = !!NewOps[0]; | |||
48104 | bool NegB = !!NewOps[1]; | |||
48105 | bool NegC = !!NewOps[2]; | |||
48106 | unsigned NewOpc = negateFMAOpcode(Opc, NegA != NegB, NegC, true); | |||
48107 | ||||
48108 | Cost = (NegA || NegB || NegC) ? NegatibleCost::Cheaper | |||
48109 | : NegatibleCost::Neutral; | |||
48110 | ||||
48111 | // Fill in the non-negated ops with the original values. | |||
48112 | for (int i = 0, e = Op.getNumOperands(); i != e; ++i) | |||
48113 | if (!NewOps[i]) | |||
48114 | NewOps[i] = Op.getOperand(i); | |||
48115 | return DAG.getNode(NewOpc, SDLoc(Op), VT, NewOps); | |||
48116 | } | |||
48117 | case X86ISD::FRCP: | |||
48118 | if (SDValue NegOp0 = | |||
48119 | getNegatedExpression(Op.getOperand(0), DAG, LegalOperations, | |||
48120 | ForCodeSize, Cost, Depth + 1)) | |||
48121 | return DAG.getNode(Opc, SDLoc(Op), VT, NegOp0); | |||
48122 | break; | |||
48123 | } | |||
48124 | ||||
48125 | return TargetLowering::getNegatedExpression(Op, DAG, LegalOperations, | |||
48126 | ForCodeSize, Cost, Depth); | |||
48127 | } | |||
48128 | ||||
48129 | static SDValue lowerX86FPLogicOp(SDNode *N, SelectionDAG &DAG, | |||
48130 | const X86Subtarget &Subtarget) { | |||
48131 | MVT VT = N->getSimpleValueType(0); | |||
48132 | // If we have integer vector types available, use the integer opcodes. | |||
48133 | if (!VT.isVector() || !Subtarget.hasSSE2()) | |||
48134 | return SDValue(); | |||
48135 | ||||
48136 | SDLoc dl(N); | |||
48137 | ||||
48138 | unsigned IntBits = VT.getScalarSizeInBits(); | |||
48139 | MVT IntSVT = MVT::getIntegerVT(IntBits); | |||
48140 | MVT IntVT = MVT::getVectorVT(IntSVT, VT.getSizeInBits() / IntBits); | |||
48141 | ||||
48142 | SDValue Op0 = DAG.getBitcast(IntVT, N->getOperand(0)); | |||
48143 | SDValue Op1 = DAG.getBitcast(IntVT, N->getOperand(1)); | |||
48144 | unsigned IntOpcode; | |||
48145 | switch (N->getOpcode()) { | |||
48146 | default: llvm_unreachable("Unexpected FP logic op")::llvm::llvm_unreachable_internal("Unexpected FP logic op", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 48146); | |||
48147 | case X86ISD::FOR: IntOpcode = ISD::OR; break; | |||
48148 | case X86ISD::FXOR: IntOpcode = ISD::XOR; break; | |||
48149 | case X86ISD::FAND: IntOpcode = ISD::AND; break; | |||
48150 | case X86ISD::FANDN: IntOpcode = X86ISD::ANDNP; break; | |||
48151 | } | |||
48152 | SDValue IntOp = DAG.getNode(IntOpcode, dl, IntVT, Op0, Op1); | |||
48153 | return DAG.getBitcast(VT, IntOp); | |||
48154 | } | |||
48155 | ||||
48156 | ||||
48157 | /// Fold a xor(setcc cond, val), 1 --> setcc (inverted(cond), val) | |||
48158 | static SDValue foldXor1SetCC(SDNode *N, SelectionDAG &DAG) { | |||
48159 | if (N->getOpcode() != ISD::XOR) | |||
48160 | return SDValue(); | |||
48161 | ||||
48162 | SDValue LHS = N->getOperand(0); | |||
48163 | if (!isOneConstant(N->getOperand(1)) || LHS->getOpcode() != X86ISD::SETCC) | |||
48164 | return SDValue(); | |||
48165 | ||||
48166 | X86::CondCode NewCC = X86::GetOppositeBranchCondition( | |||
48167 | X86::CondCode(LHS->getConstantOperandVal(0))); | |||
48168 | SDLoc DL(N); | |||
48169 | return getSETCC(NewCC, LHS->getOperand(1), DL, DAG); | |||
48170 | } | |||
48171 | ||||
48172 | static SDValue combineXor(SDNode *N, SelectionDAG &DAG, | |||
48173 | TargetLowering::DAGCombinerInfo &DCI, | |||
48174 | const X86Subtarget &Subtarget) { | |||
48175 | SDValue N0 = N->getOperand(0); | |||
48176 | SDValue N1 = N->getOperand(1); | |||
48177 | EVT VT = N->getValueType(0); | |||
48178 | ||||
48179 | // If this is SSE1 only convert to FXOR to avoid scalarization. | |||
48180 | if (Subtarget.hasSSE1() && !Subtarget.hasSSE2() && VT == MVT::v4i32) { | |||
48181 | return DAG.getBitcast(MVT::v4i32, | |||
48182 | DAG.getNode(X86ISD::FXOR, SDLoc(N), MVT::v4f32, | |||
48183 | DAG.getBitcast(MVT::v4f32, N0), | |||
48184 | DAG.getBitcast(MVT::v4f32, N1))); | |||
48185 | } | |||
48186 | ||||
48187 | if (SDValue Cmp = foldVectorXorShiftIntoCmp(N, DAG, Subtarget)) | |||
48188 | return Cmp; | |||
48189 | ||||
48190 | if (SDValue R = combineBitOpWithMOVMSK(N, DAG)) | |||
48191 | return R; | |||
48192 | ||||
48193 | if (DCI.isBeforeLegalizeOps()) | |||
48194 | return SDValue(); | |||
48195 | ||||
48196 | if (SDValue SetCC = foldXor1SetCC(N, DAG)) | |||
48197 | return SetCC; | |||
48198 | ||||
48199 | if (SDValue RV = foldXorTruncShiftIntoCmp(N, DAG)) | |||
48200 | return RV; | |||
48201 | ||||
48202 | // Fold not(iX bitcast(vXi1)) -> (iX bitcast(not(vec))) for legal boolvecs. | |||
48203 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
48204 | if (llvm::isAllOnesConstant(N1) && N0.getOpcode() == ISD::BITCAST && | |||
48205 | N0.getOperand(0).getValueType().isVector() && | |||
48206 | N0.getOperand(0).getValueType().getVectorElementType() == MVT::i1 && | |||
48207 | TLI.isTypeLegal(N0.getOperand(0).getValueType()) && N0.hasOneUse()) { | |||
48208 | return DAG.getBitcast(VT, DAG.getNOT(SDLoc(N), N0.getOperand(0), | |||
48209 | N0.getOperand(0).getValueType())); | |||
48210 | } | |||
48211 | ||||
48212 | // Handle AVX512 mask widening. | |||
48213 | // Fold not(insert_subvector(undef,sub)) -> insert_subvector(undef,not(sub)) | |||
48214 | if (ISD::isBuildVectorAllOnes(N1.getNode()) && VT.isVector() && | |||
48215 | VT.getVectorElementType() == MVT::i1 && | |||
48216 | N0.getOpcode() == ISD::INSERT_SUBVECTOR && N0.getOperand(0).isUndef() && | |||
48217 | TLI.isTypeLegal(N0.getOperand(1).getValueType())) { | |||
48218 | return DAG.getNode( | |||
48219 | ISD::INSERT_SUBVECTOR, SDLoc(N), VT, N0.getOperand(0), | |||
48220 | DAG.getNOT(SDLoc(N), N0.getOperand(1), N0.getOperand(1).getValueType()), | |||
48221 | N0.getOperand(2)); | |||
48222 | } | |||
48223 | ||||
48224 | // Fold xor(zext(xor(x,c1)),c2) -> xor(zext(x),xor(zext(c1),c2)) | |||
48225 | // Fold xor(truncate(xor(x,c1)),c2) -> xor(truncate(x),xor(truncate(c1),c2)) | |||
48226 | // TODO: Under what circumstances could this be performed in DAGCombine? | |||
48227 | if ((N0.getOpcode() == ISD::TRUNCATE || N0.getOpcode() == ISD::ZERO_EXTEND) && | |||
48228 | N0.getOperand(0).getOpcode() == N->getOpcode()) { | |||
48229 | SDValue TruncExtSrc = N0.getOperand(0); | |||
48230 | auto *N1C = dyn_cast<ConstantSDNode>(N1); | |||
48231 | auto *N001C = dyn_cast<ConstantSDNode>(TruncExtSrc.getOperand(1)); | |||
48232 | if (N1C && !N1C->isOpaque() && N001C && !N001C->isOpaque()) { | |||
48233 | SDLoc DL(N); | |||
48234 | SDValue LHS = DAG.getZExtOrTrunc(TruncExtSrc.getOperand(0), DL, VT); | |||
48235 | SDValue RHS = DAG.getZExtOrTrunc(TruncExtSrc.getOperand(1), DL, VT); | |||
48236 | return DAG.getNode(ISD::XOR, DL, VT, LHS, | |||
48237 | DAG.getNode(ISD::XOR, DL, VT, RHS, N1)); | |||
48238 | } | |||
48239 | } | |||
48240 | ||||
48241 | if (SDValue FPLogic = convertIntLogicToFPLogic(N, DAG, Subtarget)) | |||
48242 | return FPLogic; | |||
48243 | ||||
48244 | return combineFneg(N, DAG, DCI, Subtarget); | |||
48245 | } | |||
48246 | ||||
48247 | static SDValue combineBEXTR(SDNode *N, SelectionDAG &DAG, | |||
48248 | TargetLowering::DAGCombinerInfo &DCI, | |||
48249 | const X86Subtarget &Subtarget) { | |||
48250 | EVT VT = N->getValueType(0); | |||
48251 | unsigned NumBits = VT.getSizeInBits(); | |||
48252 | ||||
48253 | // TODO - Constant Folding. | |||
48254 | ||||
48255 | // Simplify the inputs. | |||
48256 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
48257 | APInt DemandedMask(APInt::getAllOnesValue(NumBits)); | |||
48258 | if (TLI.SimplifyDemandedBits(SDValue(N, 0), DemandedMask, DCI)) | |||
48259 | return SDValue(N, 0); | |||
48260 | ||||
48261 | return SDValue(); | |||
48262 | } | |||
48263 | ||||
48264 | static bool isNullFPScalarOrVectorConst(SDValue V) { | |||
48265 | return isNullFPConstant(V) || ISD::isBuildVectorAllZeros(V.getNode()); | |||
48266 | } | |||
48267 | ||||
48268 | /// If a value is a scalar FP zero or a vector FP zero (potentially including | |||
48269 | /// undefined elements), return a zero constant that may be used to fold away | |||
48270 | /// that value. In the case of a vector, the returned constant will not contain | |||
48271 | /// undefined elements even if the input parameter does. This makes it suitable | |||
48272 | /// to be used as a replacement operand with operations (eg, bitwise-and) where | |||
48273 | /// an undef should not propagate. | |||
48274 | static SDValue getNullFPConstForNullVal(SDValue V, SelectionDAG &DAG, | |||
48275 | const X86Subtarget &Subtarget) { | |||
48276 | if (!isNullFPScalarOrVectorConst(V)) | |||
48277 | return SDValue(); | |||
48278 | ||||
48279 | if (V.getValueType().isVector()) | |||
48280 | return getZeroVector(V.getSimpleValueType(), Subtarget, DAG, SDLoc(V)); | |||
48281 | ||||
48282 | return V; | |||
48283 | } | |||
48284 | ||||
48285 | static SDValue combineFAndFNotToFAndn(SDNode *N, SelectionDAG &DAG, | |||
48286 | const X86Subtarget &Subtarget) { | |||
48287 | SDValue N0 = N->getOperand(0); | |||
48288 | SDValue N1 = N->getOperand(1); | |||
48289 | EVT VT = N->getValueType(0); | |||
48290 | SDLoc DL(N); | |||
48291 | ||||
48292 | // Vector types are handled in combineANDXORWithAllOnesIntoANDNP(). | |||
48293 | if (!((VT == MVT::f32 && Subtarget.hasSSE1()) || | |||
48294 | (VT == MVT::f64 && Subtarget.hasSSE2()) || | |||
48295 | (VT == MVT::v4f32 && Subtarget.hasSSE1() && !Subtarget.hasSSE2()))) | |||
48296 | return SDValue(); | |||
48297 | ||||
48298 | auto isAllOnesConstantFP = [](SDValue V) { | |||
48299 | if (V.getSimpleValueType().isVector()) | |||
48300 | return ISD::isBuildVectorAllOnes(V.getNode()); | |||
48301 | auto *C = dyn_cast<ConstantFPSDNode>(V); | |||
48302 | return C && C->getConstantFPValue()->isAllOnesValue(); | |||
48303 | }; | |||
48304 | ||||
48305 | // fand (fxor X, -1), Y --> fandn X, Y | |||
48306 | if (N0.getOpcode() == X86ISD::FXOR && isAllOnesConstantFP(N0.getOperand(1))) | |||
48307 | return DAG.getNode(X86ISD::FANDN, DL, VT, N0.getOperand(0), N1); | |||
48308 | ||||
48309 | // fand X, (fxor Y, -1) --> fandn Y, X | |||
48310 | if (N1.getOpcode() == X86ISD::FXOR && isAllOnesConstantFP(N1.getOperand(1))) | |||
48311 | return DAG.getNode(X86ISD::FANDN, DL, VT, N1.getOperand(0), N0); | |||
48312 | ||||
48313 | return SDValue(); | |||
48314 | } | |||
48315 | ||||
48316 | /// Do target-specific dag combines on X86ISD::FAND nodes. | |||
48317 | static SDValue combineFAnd(SDNode *N, SelectionDAG &DAG, | |||
48318 | const X86Subtarget &Subtarget) { | |||
48319 | // FAND(0.0, x) -> 0.0 | |||
48320 | if (SDValue V = getNullFPConstForNullVal(N->getOperand(0), DAG, Subtarget)) | |||
48321 | return V; | |||
48322 | ||||
48323 | // FAND(x, 0.0) -> 0.0 | |||
48324 | if (SDValue V = getNullFPConstForNullVal(N->getOperand(1), DAG, Subtarget)) | |||
48325 | return V; | |||
48326 | ||||
48327 | if (SDValue V = combineFAndFNotToFAndn(N, DAG, Subtarget)) | |||
48328 | return V; | |||
48329 | ||||
48330 | return lowerX86FPLogicOp(N, DAG, Subtarget); | |||
48331 | } | |||
48332 | ||||
48333 | /// Do target-specific dag combines on X86ISD::FANDN nodes. | |||
48334 | static SDValue combineFAndn(SDNode *N, SelectionDAG &DAG, | |||
48335 | const X86Subtarget &Subtarget) { | |||
48336 | // FANDN(0.0, x) -> x | |||
48337 | if (isNullFPScalarOrVectorConst(N->getOperand(0))) | |||
48338 | return N->getOperand(1); | |||
48339 | ||||
48340 | // FANDN(x, 0.0) -> 0.0 | |||
48341 | if (SDValue V = getNullFPConstForNullVal(N->getOperand(1), DAG, Subtarget)) | |||
48342 | return V; | |||
48343 | ||||
48344 | return lowerX86FPLogicOp(N, DAG, Subtarget); | |||
48345 | } | |||
48346 | ||||
48347 | /// Do target-specific dag combines on X86ISD::FOR and X86ISD::FXOR nodes. | |||
48348 | static SDValue combineFOr(SDNode *N, SelectionDAG &DAG, | |||
48349 | TargetLowering::DAGCombinerInfo &DCI, | |||
48350 | const X86Subtarget &Subtarget) { | |||
48351 | assert(N->getOpcode() == X86ISD::FOR || N->getOpcode() == X86ISD::FXOR)(static_cast <bool> (N->getOpcode() == X86ISD::FOR || N->getOpcode() == X86ISD::FXOR) ? void (0) : __assert_fail ("N->getOpcode() == X86ISD::FOR || N->getOpcode() == X86ISD::FXOR" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 48351, __extension__ __PRETTY_FUNCTION__)); | |||
48352 | ||||
48353 | // F[X]OR(0.0, x) -> x | |||
48354 | if (isNullFPScalarOrVectorConst(N->getOperand(0))) | |||
48355 | return N->getOperand(1); | |||
48356 | ||||
48357 | // F[X]OR(x, 0.0) -> x | |||
48358 | if (isNullFPScalarOrVectorConst(N->getOperand(1))) | |||
48359 | return N->getOperand(0); | |||
48360 | ||||
48361 | if (SDValue NewVal = combineFneg(N, DAG, DCI, Subtarget)) | |||
48362 | return NewVal; | |||
48363 | ||||
48364 | return lowerX86FPLogicOp(N, DAG, Subtarget); | |||
48365 | } | |||
48366 | ||||
48367 | /// Do target-specific dag combines on X86ISD::FMIN and X86ISD::FMAX nodes. | |||
48368 | static SDValue combineFMinFMax(SDNode *N, SelectionDAG &DAG) { | |||
48369 | assert(N->getOpcode() == X86ISD::FMIN || N->getOpcode() == X86ISD::FMAX)(static_cast <bool> (N->getOpcode() == X86ISD::FMIN || N->getOpcode() == X86ISD::FMAX) ? void (0) : __assert_fail ("N->getOpcode() == X86ISD::FMIN || N->getOpcode() == X86ISD::FMAX" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 48369, __extension__ __PRETTY_FUNCTION__)); | |||
48370 | ||||
48371 | // FMIN/FMAX are commutative if no NaNs and no negative zeros are allowed. | |||
48372 | if (!DAG.getTarget().Options.NoNaNsFPMath || | |||
48373 | !DAG.getTarget().Options.NoSignedZerosFPMath) | |||
48374 | return SDValue(); | |||
48375 | ||||
48376 | // If we run in unsafe-math mode, then convert the FMAX and FMIN nodes | |||
48377 | // into FMINC and FMAXC, which are Commutative operations. | |||
48378 | unsigned NewOp = 0; | |||
48379 | switch (N->getOpcode()) { | |||
48380 | default: llvm_unreachable("unknown opcode")::llvm::llvm_unreachable_internal("unknown opcode", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 48380); | |||
48381 | case X86ISD::FMIN: NewOp = X86ISD::FMINC; break; | |||
48382 | case X86ISD::FMAX: NewOp = X86ISD::FMAXC; break; | |||
48383 | } | |||
48384 | ||||
48385 | return DAG.getNode(NewOp, SDLoc(N), N->getValueType(0), | |||
48386 | N->getOperand(0), N->getOperand(1)); | |||
48387 | } | |||
48388 | ||||
48389 | static SDValue combineFMinNumFMaxNum(SDNode *N, SelectionDAG &DAG, | |||
48390 | const X86Subtarget &Subtarget) { | |||
48391 | if (Subtarget.useSoftFloat()) | |||
48392 | return SDValue(); | |||
48393 | ||||
48394 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
48395 | ||||
48396 | EVT VT = N->getValueType(0); | |||
48397 | if (!((Subtarget.hasSSE1() && VT == MVT::f32) || | |||
48398 | (Subtarget.hasSSE2() && VT == MVT::f64) || | |||
48399 | (Subtarget.hasFP16() && VT == MVT::f16) || | |||
48400 | (VT.isVector() && TLI.isTypeLegal(VT)))) | |||
48401 | return SDValue(); | |||
48402 | ||||
48403 | SDValue Op0 = N->getOperand(0); | |||
48404 | SDValue Op1 = N->getOperand(1); | |||
48405 | SDLoc DL(N); | |||
48406 | auto MinMaxOp = N->getOpcode() == ISD::FMAXNUM ? X86ISD::FMAX : X86ISD::FMIN; | |||
48407 | ||||
48408 | // If we don't have to respect NaN inputs, this is a direct translation to x86 | |||
48409 | // min/max instructions. | |||
48410 | if (DAG.getTarget().Options.NoNaNsFPMath || N->getFlags().hasNoNaNs()) | |||
48411 | return DAG.getNode(MinMaxOp, DL, VT, Op0, Op1, N->getFlags()); | |||
48412 | ||||
48413 | // If one of the operands is known non-NaN use the native min/max instructions | |||
48414 | // with the non-NaN input as second operand. | |||
48415 | if (DAG.isKnownNeverNaN(Op1)) | |||
48416 | return DAG.getNode(MinMaxOp, DL, VT, Op0, Op1, N->getFlags()); | |||
48417 | if (DAG.isKnownNeverNaN(Op0)) | |||
48418 | return DAG.getNode(MinMaxOp, DL, VT, Op1, Op0, N->getFlags()); | |||
48419 | ||||
48420 | // If we have to respect NaN inputs, this takes at least 3 instructions. | |||
48421 | // Favor a library call when operating on a scalar and minimizing code size. | |||
48422 | if (!VT.isVector() && DAG.getMachineFunction().getFunction().hasMinSize()) | |||
48423 | return SDValue(); | |||
48424 | ||||
48425 | EVT SetCCType = TLI.getSetCCResultType(DAG.getDataLayout(), *DAG.getContext(), | |||
48426 | VT); | |||
48427 | ||||
48428 | // There are 4 possibilities involving NaN inputs, and these are the required | |||
48429 | // outputs: | |||
48430 | // Op1 | |||
48431 | // Num NaN | |||
48432 | // ---------------- | |||
48433 | // Num | Max | Op0 | | |||
48434 | // Op0 ---------------- | |||
48435 | // NaN | Op1 | NaN | | |||
48436 | // ---------------- | |||
48437 | // | |||
48438 | // The SSE FP max/min instructions were not designed for this case, but rather | |||
48439 | // to implement: | |||
48440 | // Min = Op1 < Op0 ? Op1 : Op0 | |||
48441 | // Max = Op1 > Op0 ? Op1 : Op0 | |||
48442 | // | |||
48443 | // So they always return Op0 if either input is a NaN. However, we can still | |||
48444 | // use those instructions for fmaxnum by selecting away a NaN input. | |||
48445 | ||||
48446 | // If either operand is NaN, the 2nd source operand (Op0) is passed through. | |||
48447 | SDValue MinOrMax = DAG.getNode(MinMaxOp, DL, VT, Op1, Op0); | |||
48448 | SDValue IsOp0Nan = DAG.getSetCC(DL, SetCCType, Op0, Op0, ISD::SETUO); | |||
48449 | ||||
48450 | // If Op0 is a NaN, select Op1. Otherwise, select the max. If both operands | |||
48451 | // are NaN, the NaN value of Op1 is the result. | |||
48452 | return DAG.getSelect(DL, VT, IsOp0Nan, Op1, MinOrMax); | |||
48453 | } | |||
48454 | ||||
48455 | static SDValue combineX86INT_TO_FP(SDNode *N, SelectionDAG &DAG, | |||
48456 | TargetLowering::DAGCombinerInfo &DCI) { | |||
48457 | EVT VT = N->getValueType(0); | |||
48458 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
48459 | ||||
48460 | APInt KnownUndef, KnownZero; | |||
48461 | APInt DemandedElts = APInt::getAllOnesValue(VT.getVectorNumElements()); | |||
48462 | if (TLI.SimplifyDemandedVectorElts(SDValue(N, 0), DemandedElts, KnownUndef, | |||
48463 | KnownZero, DCI)) | |||
48464 | return SDValue(N, 0); | |||
48465 | ||||
48466 | // Convert a full vector load into vzload when not all bits are needed. | |||
48467 | SDValue In = N->getOperand(0); | |||
48468 | MVT InVT = In.getSimpleValueType(); | |||
48469 | if (VT.getVectorNumElements() < InVT.getVectorNumElements() && | |||
48470 | ISD::isNormalLoad(In.getNode()) && In.hasOneUse()) { | |||
48471 | assert(InVT.is128BitVector() && "Expected 128-bit input vector")(static_cast <bool> (InVT.is128BitVector() && "Expected 128-bit input vector" ) ? void (0) : __assert_fail ("InVT.is128BitVector() && \"Expected 128-bit input vector\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 48471, __extension__ __PRETTY_FUNCTION__)); | |||
48472 | LoadSDNode *LN = cast<LoadSDNode>(N->getOperand(0)); | |||
48473 | unsigned NumBits = InVT.getScalarSizeInBits() * VT.getVectorNumElements(); | |||
48474 | MVT MemVT = MVT::getIntegerVT(NumBits); | |||
48475 | MVT LoadVT = MVT::getVectorVT(MemVT, 128 / NumBits); | |||
48476 | if (SDValue VZLoad = narrowLoadToVZLoad(LN, MemVT, LoadVT, DAG)) { | |||
48477 | SDLoc dl(N); | |||
48478 | SDValue Convert = DAG.getNode(N->getOpcode(), dl, VT, | |||
48479 | DAG.getBitcast(InVT, VZLoad)); | |||
48480 | DCI.CombineTo(N, Convert); | |||
48481 | DAG.ReplaceAllUsesOfValueWith(SDValue(LN, 1), VZLoad.getValue(1)); | |||
48482 | DCI.recursivelyDeleteUnusedNodes(LN); | |||
48483 | return SDValue(N, 0); | |||
48484 | } | |||
48485 | } | |||
48486 | ||||
48487 | return SDValue(); | |||
48488 | } | |||
48489 | ||||
48490 | static SDValue combineCVTP2I_CVTTP2I(SDNode *N, SelectionDAG &DAG, | |||
48491 | TargetLowering::DAGCombinerInfo &DCI) { | |||
48492 | bool IsStrict = N->isTargetStrictFPOpcode(); | |||
48493 | EVT VT = N->getValueType(0); | |||
48494 | ||||
48495 | // Convert a full vector load into vzload when not all bits are needed. | |||
48496 | SDValue In = N->getOperand(IsStrict ? 1 : 0); | |||
48497 | MVT InVT = In.getSimpleValueType(); | |||
48498 | if (VT.getVectorNumElements() < InVT.getVectorNumElements() && | |||
48499 | ISD::isNormalLoad(In.getNode()) && In.hasOneUse()) { | |||
48500 | assert(InVT.is128BitVector() && "Expected 128-bit input vector")(static_cast <bool> (InVT.is128BitVector() && "Expected 128-bit input vector" ) ? void (0) : __assert_fail ("InVT.is128BitVector() && \"Expected 128-bit input vector\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 48500, __extension__ __PRETTY_FUNCTION__)); | |||
48501 | LoadSDNode *LN = cast<LoadSDNode>(In); | |||
48502 | unsigned NumBits = InVT.getScalarSizeInBits() * VT.getVectorNumElements(); | |||
48503 | MVT MemVT = MVT::getFloatingPointVT(NumBits); | |||
48504 | MVT LoadVT = MVT::getVectorVT(MemVT, 128 / NumBits); | |||
48505 | if (SDValue VZLoad = narrowLoadToVZLoad(LN, MemVT, LoadVT, DAG)) { | |||
48506 | SDLoc dl(N); | |||
48507 | if (IsStrict) { | |||
48508 | SDValue Convert = | |||
48509 | DAG.getNode(N->getOpcode(), dl, {VT, MVT::Other}, | |||
48510 | {N->getOperand(0), DAG.getBitcast(InVT, VZLoad)}); | |||
48511 | DCI.CombineTo(N, Convert, Convert.getValue(1)); | |||
48512 | } else { | |||
48513 | SDValue Convert = | |||
48514 | DAG.getNode(N->getOpcode(), dl, VT, DAG.getBitcast(InVT, VZLoad)); | |||
48515 | DCI.CombineTo(N, Convert); | |||
48516 | } | |||
48517 | DAG.ReplaceAllUsesOfValueWith(SDValue(LN, 1), VZLoad.getValue(1)); | |||
48518 | DCI.recursivelyDeleteUnusedNodes(LN); | |||
48519 | return SDValue(N, 0); | |||
48520 | } | |||
48521 | } | |||
48522 | ||||
48523 | return SDValue(); | |||
48524 | } | |||
48525 | ||||
48526 | /// Do target-specific dag combines on X86ISD::ANDNP nodes. | |||
48527 | static SDValue combineAndnp(SDNode *N, SelectionDAG &DAG, | |||
48528 | TargetLowering::DAGCombinerInfo &DCI, | |||
48529 | const X86Subtarget &Subtarget) { | |||
48530 | MVT VT = N->getSimpleValueType(0); | |||
48531 | ||||
48532 | // ANDNP(0, x) -> x | |||
48533 | if (ISD::isBuildVectorAllZeros(N->getOperand(0).getNode())) | |||
48534 | return N->getOperand(1); | |||
48535 | ||||
48536 | // ANDNP(x, 0) -> 0 | |||
48537 | if (ISD::isBuildVectorAllZeros(N->getOperand(1).getNode())) | |||
48538 | return DAG.getConstant(0, SDLoc(N), VT); | |||
48539 | ||||
48540 | // Turn ANDNP back to AND if input is inverted. | |||
48541 | if (SDValue Not = IsNOT(N->getOperand(0), DAG)) | |||
48542 | return DAG.getNode(ISD::AND, SDLoc(N), VT, DAG.getBitcast(VT, Not), | |||
48543 | N->getOperand(1)); | |||
48544 | ||||
48545 | // Attempt to recursively combine a bitmask ANDNP with shuffles. | |||
48546 | if (VT.isVector() && (VT.getScalarSizeInBits() % 8) == 0) { | |||
48547 | SDValue Op(N, 0); | |||
48548 | if (SDValue Res = combineX86ShufflesRecursively(Op, DAG, Subtarget)) | |||
48549 | return Res; | |||
48550 | } | |||
48551 | ||||
48552 | return SDValue(); | |||
48553 | } | |||
48554 | ||||
48555 | static SDValue combineBT(SDNode *N, SelectionDAG &DAG, | |||
48556 | TargetLowering::DAGCombinerInfo &DCI) { | |||
48557 | SDValue N1 = N->getOperand(1); | |||
48558 | ||||
48559 | // BT ignores high bits in the bit index operand. | |||
48560 | unsigned BitWidth = N1.getValueSizeInBits(); | |||
48561 | APInt DemandedMask = APInt::getLowBitsSet(BitWidth, Log2_32(BitWidth)); | |||
48562 | if (DAG.getTargetLoweringInfo().SimplifyDemandedBits(N1, DemandedMask, DCI)) { | |||
48563 | if (N->getOpcode() != ISD::DELETED_NODE) | |||
48564 | DCI.AddToWorklist(N); | |||
48565 | return SDValue(N, 0); | |||
48566 | } | |||
48567 | ||||
48568 | return SDValue(); | |||
48569 | } | |||
48570 | ||||
48571 | static SDValue combineCVTPH2PS(SDNode *N, SelectionDAG &DAG, | |||
48572 | TargetLowering::DAGCombinerInfo &DCI) { | |||
48573 | bool IsStrict = N->getOpcode() == X86ISD::STRICT_CVTPH2PS; | |||
48574 | SDValue Src = N->getOperand(IsStrict ? 1 : 0); | |||
48575 | ||||
48576 | if (N->getValueType(0) == MVT::v4f32 && Src.getValueType() == MVT::v8i16) { | |||
48577 | APInt KnownUndef, KnownZero; | |||
48578 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
48579 | APInt DemandedElts = APInt::getLowBitsSet(8, 4); | |||
48580 | if (TLI.SimplifyDemandedVectorElts(Src, DemandedElts, KnownUndef, KnownZero, | |||
48581 | DCI)) { | |||
48582 | if (N->getOpcode() != ISD::DELETED_NODE) | |||
48583 | DCI.AddToWorklist(N); | |||
48584 | return SDValue(N, 0); | |||
48585 | } | |||
48586 | ||||
48587 | // Convert a full vector load into vzload when not all bits are needed. | |||
48588 | if (ISD::isNormalLoad(Src.getNode()) && Src.hasOneUse()) { | |||
48589 | LoadSDNode *LN = cast<LoadSDNode>(N->getOperand(IsStrict ? 1 : 0)); | |||
48590 | if (SDValue VZLoad = narrowLoadToVZLoad(LN, MVT::i64, MVT::v2i64, DAG)) { | |||
48591 | SDLoc dl(N); | |||
48592 | if (IsStrict) { | |||
48593 | SDValue Convert = DAG.getNode( | |||
48594 | N->getOpcode(), dl, {MVT::v4f32, MVT::Other}, | |||
48595 | {N->getOperand(0), DAG.getBitcast(MVT::v8i16, VZLoad)}); | |||
48596 | DCI.CombineTo(N, Convert, Convert.getValue(1)); | |||
48597 | } else { | |||
48598 | SDValue Convert = DAG.getNode(N->getOpcode(), dl, MVT::v4f32, | |||
48599 | DAG.getBitcast(MVT::v8i16, VZLoad)); | |||
48600 | DCI.CombineTo(N, Convert); | |||
48601 | } | |||
48602 | ||||
48603 | DAG.ReplaceAllUsesOfValueWith(SDValue(LN, 1), VZLoad.getValue(1)); | |||
48604 | DCI.recursivelyDeleteUnusedNodes(LN); | |||
48605 | return SDValue(N, 0); | |||
48606 | } | |||
48607 | } | |||
48608 | } | |||
48609 | ||||
48610 | return SDValue(); | |||
48611 | } | |||
48612 | ||||
48613 | // Try to combine sext_in_reg of a cmov of constants by extending the constants. | |||
48614 | static SDValue combineSextInRegCmov(SDNode *N, SelectionDAG &DAG) { | |||
48615 | assert(N->getOpcode() == ISD::SIGN_EXTEND_INREG)(static_cast <bool> (N->getOpcode() == ISD::SIGN_EXTEND_INREG ) ? void (0) : __assert_fail ("N->getOpcode() == ISD::SIGN_EXTEND_INREG" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 48615, __extension__ __PRETTY_FUNCTION__)); | |||
48616 | ||||
48617 | EVT DstVT = N->getValueType(0); | |||
48618 | ||||
48619 | SDValue N0 = N->getOperand(0); | |||
48620 | SDValue N1 = N->getOperand(1); | |||
48621 | EVT ExtraVT = cast<VTSDNode>(N1)->getVT(); | |||
48622 | ||||
48623 | if (ExtraVT != MVT::i8 && ExtraVT != MVT::i16) | |||
48624 | return SDValue(); | |||
48625 | ||||
48626 | // Look through single use any_extends / truncs. | |||
48627 | SDValue IntermediateBitwidthOp; | |||
48628 | if ((N0.getOpcode() == ISD::ANY_EXTEND || N0.getOpcode() == ISD::TRUNCATE) && | |||
48629 | N0.hasOneUse()) { | |||
48630 | IntermediateBitwidthOp = N0; | |||
48631 | N0 = N0.getOperand(0); | |||
48632 | } | |||
48633 | ||||
48634 | // See if we have a single use cmov. | |||
48635 | if (N0.getOpcode() != X86ISD::CMOV || !N0.hasOneUse()) | |||
48636 | return SDValue(); | |||
48637 | ||||
48638 | SDValue CMovOp0 = N0.getOperand(0); | |||
48639 | SDValue CMovOp1 = N0.getOperand(1); | |||
48640 | ||||
48641 | // Make sure both operands are constants. | |||
48642 | if (!isa<ConstantSDNode>(CMovOp0.getNode()) || | |||
48643 | !isa<ConstantSDNode>(CMovOp1.getNode())) | |||
48644 | return SDValue(); | |||
48645 | ||||
48646 | SDLoc DL(N); | |||
48647 | ||||
48648 | // If we looked through an any_extend/trunc above, add one to the constants. | |||
48649 | if (IntermediateBitwidthOp) { | |||
48650 | unsigned IntermediateOpc = IntermediateBitwidthOp.getOpcode(); | |||
48651 | CMovOp0 = DAG.getNode(IntermediateOpc, DL, DstVT, CMovOp0); | |||
48652 | CMovOp1 = DAG.getNode(IntermediateOpc, DL, DstVT, CMovOp1); | |||
48653 | } | |||
48654 | ||||
48655 | CMovOp0 = DAG.getNode(ISD::SIGN_EXTEND_INREG, DL, DstVT, CMovOp0, N1); | |||
48656 | CMovOp1 = DAG.getNode(ISD::SIGN_EXTEND_INREG, DL, DstVT, CMovOp1, N1); | |||
48657 | ||||
48658 | EVT CMovVT = DstVT; | |||
48659 | // We do not want i16 CMOV's. Promote to i32 and truncate afterwards. | |||
48660 | if (DstVT == MVT::i16) { | |||
48661 | CMovVT = MVT::i32; | |||
48662 | CMovOp0 = DAG.getNode(ISD::ZERO_EXTEND, DL, CMovVT, CMovOp0); | |||
48663 | CMovOp1 = DAG.getNode(ISD::ZERO_EXTEND, DL, CMovVT, CMovOp1); | |||
48664 | } | |||
48665 | ||||
48666 | SDValue CMov = DAG.getNode(X86ISD::CMOV, DL, CMovVT, CMovOp0, CMovOp1, | |||
48667 | N0.getOperand(2), N0.getOperand(3)); | |||
48668 | ||||
48669 | if (CMovVT != DstVT) | |||
48670 | CMov = DAG.getNode(ISD::TRUNCATE, DL, DstVT, CMov); | |||
48671 | ||||
48672 | return CMov; | |||
48673 | } | |||
48674 | ||||
48675 | static SDValue combineSignExtendInReg(SDNode *N, SelectionDAG &DAG, | |||
48676 | const X86Subtarget &Subtarget) { | |||
48677 | assert(N->getOpcode() == ISD::SIGN_EXTEND_INREG)(static_cast <bool> (N->getOpcode() == ISD::SIGN_EXTEND_INREG ) ? void (0) : __assert_fail ("N->getOpcode() == ISD::SIGN_EXTEND_INREG" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 48677, __extension__ __PRETTY_FUNCTION__)); | |||
48678 | ||||
48679 | if (SDValue V = combineSextInRegCmov(N, DAG)) | |||
48680 | return V; | |||
48681 | ||||
48682 | EVT VT = N->getValueType(0); | |||
48683 | SDValue N0 = N->getOperand(0); | |||
48684 | SDValue N1 = N->getOperand(1); | |||
48685 | EVT ExtraVT = cast<VTSDNode>(N1)->getVT(); | |||
48686 | SDLoc dl(N); | |||
48687 | ||||
48688 | // The SIGN_EXTEND_INREG to v4i64 is expensive operation on the | |||
48689 | // both SSE and AVX2 since there is no sign-extended shift right | |||
48690 | // operation on a vector with 64-bit elements. | |||
48691 | //(sext_in_reg (v4i64 anyext (v4i32 x )), ExtraVT) -> | |||
48692 | // (v4i64 sext (v4i32 sext_in_reg (v4i32 x , ExtraVT))) | |||
48693 | if (VT == MVT::v4i64 && (N0.getOpcode() == ISD::ANY_EXTEND || | |||
48694 | N0.getOpcode() == ISD::SIGN_EXTEND)) { | |||
48695 | SDValue N00 = N0.getOperand(0); | |||
48696 | ||||
48697 | // EXTLOAD has a better solution on AVX2, | |||
48698 | // it may be replaced with X86ISD::VSEXT node. | |||
48699 | if (N00.getOpcode() == ISD::LOAD && Subtarget.hasInt256()) | |||
48700 | if (!ISD::isNormalLoad(N00.getNode())) | |||
48701 | return SDValue(); | |||
48702 | ||||
48703 | // Attempt to promote any comparison mask ops before moving the | |||
48704 | // SIGN_EXTEND_INREG in the way. | |||
48705 | if (SDValue Promote = PromoteMaskArithmetic(N0.getNode(), DAG, Subtarget)) | |||
48706 | return DAG.getNode(ISD::SIGN_EXTEND_INREG, dl, VT, Promote, N1); | |||
48707 | ||||
48708 | if (N00.getValueType() == MVT::v4i32 && ExtraVT.getSizeInBits() < 128) { | |||
48709 | SDValue Tmp = | |||
48710 | DAG.getNode(ISD::SIGN_EXTEND_INREG, dl, MVT::v4i32, N00, N1); | |||
48711 | return DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v4i64, Tmp); | |||
48712 | } | |||
48713 | } | |||
48714 | return SDValue(); | |||
48715 | } | |||
48716 | ||||
48717 | /// sext(add_nsw(x, C)) --> add(sext(x), C_sext) | |||
48718 | /// zext(add_nuw(x, C)) --> add(zext(x), C_zext) | |||
48719 | /// Promoting a sign/zero extension ahead of a no overflow 'add' exposes | |||
48720 | /// opportunities to combine math ops, use an LEA, or use a complex addressing | |||
48721 | /// mode. This can eliminate extend, add, and shift instructions. | |||
48722 | static SDValue promoteExtBeforeAdd(SDNode *Ext, SelectionDAG &DAG, | |||
48723 | const X86Subtarget &Subtarget) { | |||
48724 | if (Ext->getOpcode() != ISD::SIGN_EXTEND && | |||
48725 | Ext->getOpcode() != ISD::ZERO_EXTEND) | |||
48726 | return SDValue(); | |||
48727 | ||||
48728 | // TODO: This should be valid for other integer types. | |||
48729 | EVT VT = Ext->getValueType(0); | |||
48730 | if (VT != MVT::i64) | |||
48731 | return SDValue(); | |||
48732 | ||||
48733 | SDValue Add = Ext->getOperand(0); | |||
48734 | if (Add.getOpcode() != ISD::ADD) | |||
48735 | return SDValue(); | |||
48736 | ||||
48737 | bool Sext = Ext->getOpcode() == ISD::SIGN_EXTEND; | |||
48738 | bool NSW = Add->getFlags().hasNoSignedWrap(); | |||
48739 | bool NUW = Add->getFlags().hasNoUnsignedWrap(); | |||
48740 | ||||
48741 | // We need an 'add nsw' feeding into the 'sext' or 'add nuw' feeding | |||
48742 | // into the 'zext' | |||
48743 | if ((Sext && !NSW) || (!Sext && !NUW)) | |||
48744 | return SDValue(); | |||
48745 | ||||
48746 | // Having a constant operand to the 'add' ensures that we are not increasing | |||
48747 | // the instruction count because the constant is extended for free below. | |||
48748 | // A constant operand can also become the displacement field of an LEA. | |||
48749 | auto *AddOp1 = dyn_cast<ConstantSDNode>(Add.getOperand(1)); | |||
48750 | if (!AddOp1) | |||
48751 | return SDValue(); | |||
48752 | ||||
48753 | // Don't make the 'add' bigger if there's no hope of combining it with some | |||
48754 | // other 'add' or 'shl' instruction. | |||
48755 | // TODO: It may be profitable to generate simpler LEA instructions in place | |||
48756 | // of single 'add' instructions, but the cost model for selecting an LEA | |||
48757 | // currently has a high threshold. | |||
48758 | bool HasLEAPotential = false; | |||
48759 | for (auto *User : Ext->uses()) { | |||
48760 | if (User->getOpcode() == ISD::ADD || User->getOpcode() == ISD::SHL) { | |||
48761 | HasLEAPotential = true; | |||
48762 | break; | |||
48763 | } | |||
48764 | } | |||
48765 | if (!HasLEAPotential) | |||
48766 | return SDValue(); | |||
48767 | ||||
48768 | // Everything looks good, so pull the '{s|z}ext' ahead of the 'add'. | |||
48769 | int64_t AddConstant = Sext ? AddOp1->getSExtValue() : AddOp1->getZExtValue(); | |||
48770 | SDValue AddOp0 = Add.getOperand(0); | |||
48771 | SDValue NewExt = DAG.getNode(Ext->getOpcode(), SDLoc(Ext), VT, AddOp0); | |||
48772 | SDValue NewConstant = DAG.getConstant(AddConstant, SDLoc(Add), VT); | |||
48773 | ||||
48774 | // The wider add is guaranteed to not wrap because both operands are | |||
48775 | // sign-extended. | |||
48776 | SDNodeFlags Flags; | |||
48777 | Flags.setNoSignedWrap(NSW); | |||
48778 | Flags.setNoUnsignedWrap(NUW); | |||
48779 | return DAG.getNode(ISD::ADD, SDLoc(Add), VT, NewExt, NewConstant, Flags); | |||
48780 | } | |||
48781 | ||||
48782 | // If we face {ANY,SIGN,ZERO}_EXTEND that is applied to a CMOV with constant | |||
48783 | // operands and the result of CMOV is not used anywhere else - promote CMOV | |||
48784 | // itself instead of promoting its result. This could be beneficial, because: | |||
48785 | // 1) X86TargetLowering::EmitLoweredSelect later can do merging of two | |||
48786 | // (or more) pseudo-CMOVs only when they go one-after-another and | |||
48787 | // getting rid of result extension code after CMOV will help that. | |||
48788 | // 2) Promotion of constant CMOV arguments is free, hence the | |||
48789 | // {ANY,SIGN,ZERO}_EXTEND will just be deleted. | |||
48790 | // 3) 16-bit CMOV encoding is 4 bytes, 32-bit CMOV is 3-byte, so this | |||
48791 | // promotion is also good in terms of code-size. | |||
48792 | // (64-bit CMOV is 4-bytes, that's why we don't do 32-bit => 64-bit | |||
48793 | // promotion). | |||
48794 | static SDValue combineToExtendCMOV(SDNode *Extend, SelectionDAG &DAG) { | |||
48795 | SDValue CMovN = Extend->getOperand(0); | |||
48796 | if (CMovN.getOpcode() != X86ISD::CMOV || !CMovN.hasOneUse()) | |||
48797 | return SDValue(); | |||
48798 | ||||
48799 | EVT TargetVT = Extend->getValueType(0); | |||
48800 | unsigned ExtendOpcode = Extend->getOpcode(); | |||
48801 | SDLoc DL(Extend); | |||
48802 | ||||
48803 | EVT VT = CMovN.getValueType(); | |||
48804 | SDValue CMovOp0 = CMovN.getOperand(0); | |||
48805 | SDValue CMovOp1 = CMovN.getOperand(1); | |||
48806 | ||||
48807 | if (!isa<ConstantSDNode>(CMovOp0.getNode()) || | |||
48808 | !isa<ConstantSDNode>(CMovOp1.getNode())) | |||
48809 | return SDValue(); | |||
48810 | ||||
48811 | // Only extend to i32 or i64. | |||
48812 | if (TargetVT != MVT::i32 && TargetVT != MVT::i64) | |||
48813 | return SDValue(); | |||
48814 | ||||
48815 | // Only extend from i16 unless its a sign_extend from i32. Zext/aext from i32 | |||
48816 | // are free. | |||
48817 | if (VT != MVT::i16 && !(ExtendOpcode == ISD::SIGN_EXTEND && VT == MVT::i32)) | |||
48818 | return SDValue(); | |||
48819 | ||||
48820 | // If this a zero extend to i64, we should only extend to i32 and use a free | |||
48821 | // zero extend to finish. | |||
48822 | EVT ExtendVT = TargetVT; | |||
48823 | if (TargetVT == MVT::i64 && ExtendOpcode != ISD::SIGN_EXTEND) | |||
48824 | ExtendVT = MVT::i32; | |||
48825 | ||||
48826 | CMovOp0 = DAG.getNode(ExtendOpcode, DL, ExtendVT, CMovOp0); | |||
48827 | CMovOp1 = DAG.getNode(ExtendOpcode, DL, ExtendVT, CMovOp1); | |||
48828 | ||||
48829 | SDValue Res = DAG.getNode(X86ISD::CMOV, DL, ExtendVT, CMovOp0, CMovOp1, | |||
48830 | CMovN.getOperand(2), CMovN.getOperand(3)); | |||
48831 | ||||
48832 | // Finish extending if needed. | |||
48833 | if (ExtendVT != TargetVT) | |||
48834 | Res = DAG.getNode(ExtendOpcode, DL, TargetVT, Res); | |||
48835 | ||||
48836 | return Res; | |||
48837 | } | |||
48838 | ||||
48839 | // Convert (vXiY *ext(vXi1 bitcast(iX))) to extend_in_reg(broadcast(iX)). | |||
48840 | // This is more or less the reverse of combineBitcastvxi1. | |||
48841 | static SDValue | |||
48842 | combineToExtendBoolVectorInReg(SDNode *N, SelectionDAG &DAG, | |||
48843 | TargetLowering::DAGCombinerInfo &DCI, | |||
48844 | const X86Subtarget &Subtarget) { | |||
48845 | unsigned Opcode = N->getOpcode(); | |||
48846 | if (Opcode != ISD::SIGN_EXTEND && Opcode != ISD::ZERO_EXTEND && | |||
48847 | Opcode != ISD::ANY_EXTEND) | |||
48848 | return SDValue(); | |||
48849 | if (!DCI.isBeforeLegalizeOps()) | |||
48850 | return SDValue(); | |||
48851 | if (!Subtarget.hasSSE2() || Subtarget.hasAVX512()) | |||
48852 | return SDValue(); | |||
48853 | ||||
48854 | SDValue N0 = N->getOperand(0); | |||
48855 | EVT VT = N->getValueType(0); | |||
48856 | EVT SVT = VT.getScalarType(); | |||
48857 | EVT InSVT = N0.getValueType().getScalarType(); | |||
48858 | unsigned EltSizeInBits = SVT.getSizeInBits(); | |||
48859 | ||||
48860 | // Input type must be extending a bool vector (bit-casted from a scalar | |||
48861 | // integer) to legal integer types. | |||
48862 | if (!VT.isVector()) | |||
48863 | return SDValue(); | |||
48864 | if (SVT != MVT::i64 && SVT != MVT::i32 && SVT != MVT::i16 && SVT != MVT::i8) | |||
48865 | return SDValue(); | |||
48866 | if (InSVT != MVT::i1 || N0.getOpcode() != ISD::BITCAST) | |||
48867 | return SDValue(); | |||
48868 | ||||
48869 | SDValue N00 = N0.getOperand(0); | |||
48870 | EVT SclVT = N0.getOperand(0).getValueType(); | |||
48871 | if (!SclVT.isScalarInteger()) | |||
48872 | return SDValue(); | |||
48873 | ||||
48874 | SDLoc DL(N); | |||
48875 | SDValue Vec; | |||
48876 | SmallVector<int, 32> ShuffleMask; | |||
48877 | unsigned NumElts = VT.getVectorNumElements(); | |||
48878 | assert(NumElts == SclVT.getSizeInBits() && "Unexpected bool vector size")(static_cast <bool> (NumElts == SclVT.getSizeInBits() && "Unexpected bool vector size") ? void (0) : __assert_fail ("NumElts == SclVT.getSizeInBits() && \"Unexpected bool vector size\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 48878, __extension__ __PRETTY_FUNCTION__)); | |||
48879 | ||||
48880 | // Broadcast the scalar integer to the vector elements. | |||
48881 | if (NumElts > EltSizeInBits) { | |||
48882 | // If the scalar integer is greater than the vector element size, then we | |||
48883 | // must split it down into sub-sections for broadcasting. For example: | |||
48884 | // i16 -> v16i8 (i16 -> v8i16 -> v16i8) with 2 sub-sections. | |||
48885 | // i32 -> v32i8 (i32 -> v8i32 -> v32i8) with 4 sub-sections. | |||
48886 | assert((NumElts % EltSizeInBits) == 0 && "Unexpected integer scale")(static_cast <bool> ((NumElts % EltSizeInBits) == 0 && "Unexpected integer scale") ? void (0) : __assert_fail ("(NumElts % EltSizeInBits) == 0 && \"Unexpected integer scale\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 48886, __extension__ __PRETTY_FUNCTION__)); | |||
48887 | unsigned Scale = NumElts / EltSizeInBits; | |||
48888 | EVT BroadcastVT = | |||
48889 | EVT::getVectorVT(*DAG.getContext(), SclVT, EltSizeInBits); | |||
48890 | Vec = DAG.getNode(ISD::SCALAR_TO_VECTOR, DL, BroadcastVT, N00); | |||
48891 | Vec = DAG.getBitcast(VT, Vec); | |||
48892 | ||||
48893 | for (unsigned i = 0; i != Scale; ++i) | |||
48894 | ShuffleMask.append(EltSizeInBits, i); | |||
48895 | Vec = DAG.getVectorShuffle(VT, DL, Vec, Vec, ShuffleMask); | |||
48896 | } else if (Subtarget.hasAVX2() && NumElts < EltSizeInBits && | |||
48897 | (SclVT == MVT::i8 || SclVT == MVT::i16 || SclVT == MVT::i32)) { | |||
48898 | // If we have register broadcast instructions, use the scalar size as the | |||
48899 | // element type for the shuffle. Then cast to the wider element type. The | |||
48900 | // widened bits won't be used, and this might allow the use of a broadcast | |||
48901 | // load. | |||
48902 | assert((EltSizeInBits % NumElts) == 0 && "Unexpected integer scale")(static_cast <bool> ((EltSizeInBits % NumElts) == 0 && "Unexpected integer scale") ? void (0) : __assert_fail ("(EltSizeInBits % NumElts) == 0 && \"Unexpected integer scale\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 48902, __extension__ __PRETTY_FUNCTION__)); | |||
48903 | unsigned Scale = EltSizeInBits / NumElts; | |||
48904 | EVT BroadcastVT = | |||
48905 | EVT::getVectorVT(*DAG.getContext(), SclVT, NumElts * Scale); | |||
48906 | Vec = DAG.getNode(ISD::SCALAR_TO_VECTOR, DL, BroadcastVT, N00); | |||
48907 | ShuffleMask.append(NumElts * Scale, 0); | |||
48908 | Vec = DAG.getVectorShuffle(BroadcastVT, DL, Vec, Vec, ShuffleMask); | |||
48909 | Vec = DAG.getBitcast(VT, Vec); | |||
48910 | } else { | |||
48911 | // For smaller scalar integers, we can simply any-extend it to the vector | |||
48912 | // element size (we don't care about the upper bits) and broadcast it to all | |||
48913 | // elements. | |||
48914 | SDValue Scl = DAG.getAnyExtOrTrunc(N00, DL, SVT); | |||
48915 | Vec = DAG.getNode(ISD::SCALAR_TO_VECTOR, DL, VT, Scl); | |||
48916 | ShuffleMask.append(NumElts, 0); | |||
48917 | Vec = DAG.getVectorShuffle(VT, DL, Vec, Vec, ShuffleMask); | |||
48918 | } | |||
48919 | ||||
48920 | // Now, mask the relevant bit in each element. | |||
48921 | SmallVector<SDValue, 32> Bits; | |||
48922 | for (unsigned i = 0; i != NumElts; ++i) { | |||
48923 | int BitIdx = (i % EltSizeInBits); | |||
48924 | APInt Bit = APInt::getBitsSet(EltSizeInBits, BitIdx, BitIdx + 1); | |||
48925 | Bits.push_back(DAG.getConstant(Bit, DL, SVT)); | |||
48926 | } | |||
48927 | SDValue BitMask = DAG.getBuildVector(VT, DL, Bits); | |||
48928 | Vec = DAG.getNode(ISD::AND, DL, VT, Vec, BitMask); | |||
48929 | ||||
48930 | // Compare against the bitmask and extend the result. | |||
48931 | EVT CCVT = VT.changeVectorElementType(MVT::i1); | |||
48932 | Vec = DAG.getSetCC(DL, CCVT, Vec, BitMask, ISD::SETEQ); | |||
48933 | Vec = DAG.getSExtOrTrunc(Vec, DL, VT); | |||
48934 | ||||
48935 | // For SEXT, this is now done, otherwise shift the result down for | |||
48936 | // zero-extension. | |||
48937 | if (Opcode == ISD::SIGN_EXTEND) | |||
48938 | return Vec; | |||
48939 | return DAG.getNode(ISD::SRL, DL, VT, Vec, | |||
48940 | DAG.getConstant(EltSizeInBits - 1, DL, VT)); | |||
48941 | } | |||
48942 | ||||
48943 | // Attempt to combine a (sext/zext (setcc)) to a setcc with a xmm/ymm/zmm | |||
48944 | // result type. | |||
48945 | static SDValue combineExtSetcc(SDNode *N, SelectionDAG &DAG, | |||
48946 | const X86Subtarget &Subtarget) { | |||
48947 | SDValue N0 = N->getOperand(0); | |||
48948 | EVT VT = N->getValueType(0); | |||
48949 | SDLoc dl(N); | |||
48950 | ||||
48951 | // Only do this combine with AVX512 for vector extends. | |||
48952 | if (!Subtarget.hasAVX512() || !VT.isVector() || N0.getOpcode() != ISD::SETCC) | |||
48953 | return SDValue(); | |||
48954 | ||||
48955 | // Only combine legal element types. | |||
48956 | EVT SVT = VT.getVectorElementType(); | |||
48957 | if (SVT != MVT::i8 && SVT != MVT::i16 && SVT != MVT::i32 && | |||
48958 | SVT != MVT::i64 && SVT != MVT::f32 && SVT != MVT::f64) | |||
48959 | return SDValue(); | |||
48960 | ||||
48961 | // We don't have CMPP Instruction for vxf16 | |||
48962 | if (N0.getOperand(0).getValueType().getVectorElementType() == MVT::f16) | |||
48963 | return SDValue(); | |||
48964 | // We can only do this if the vector size in 256 bits or less. | |||
48965 | unsigned Size = VT.getSizeInBits(); | |||
48966 | if (Size > 256 && Subtarget.useAVX512Regs()) | |||
48967 | return SDValue(); | |||
48968 | ||||
48969 | // Don't fold if the condition code can't be handled by PCMPEQ/PCMPGT since | |||
48970 | // that's the only integer compares with we have. | |||
48971 | ISD::CondCode CC = cast<CondCodeSDNode>(N0.getOperand(2))->get(); | |||
48972 | if (ISD::isUnsignedIntSetCC(CC)) | |||
48973 | return SDValue(); | |||
48974 | ||||
48975 | // Only do this combine if the extension will be fully consumed by the setcc. | |||
48976 | EVT N00VT = N0.getOperand(0).getValueType(); | |||
48977 | EVT MatchingVecType = N00VT.changeVectorElementTypeToInteger(); | |||
48978 | if (Size != MatchingVecType.getSizeInBits()) | |||
48979 | return SDValue(); | |||
48980 | ||||
48981 | SDValue Res = DAG.getSetCC(dl, VT, N0.getOperand(0), N0.getOperand(1), CC); | |||
48982 | ||||
48983 | if (N->getOpcode() == ISD::ZERO_EXTEND) | |||
48984 | Res = DAG.getZeroExtendInReg(Res, dl, N0.getValueType()); | |||
48985 | ||||
48986 | return Res; | |||
48987 | } | |||
48988 | ||||
48989 | static SDValue combineSext(SDNode *N, SelectionDAG &DAG, | |||
48990 | TargetLowering::DAGCombinerInfo &DCI, | |||
48991 | const X86Subtarget &Subtarget) { | |||
48992 | SDValue N0 = N->getOperand(0); | |||
48993 | EVT VT = N->getValueType(0); | |||
48994 | SDLoc DL(N); | |||
48995 | ||||
48996 | // (i32 (sext (i8 (x86isd::setcc_carry)))) -> (i32 (x86isd::setcc_carry)) | |||
48997 | if (!DCI.isBeforeLegalizeOps() && | |||
48998 | N0.getOpcode() == X86ISD::SETCC_CARRY) { | |||
48999 | SDValue Setcc = DAG.getNode(X86ISD::SETCC_CARRY, DL, VT, N0->getOperand(0), | |||
49000 | N0->getOperand(1)); | |||
49001 | bool ReplaceOtherUses = !N0.hasOneUse(); | |||
49002 | DCI.CombineTo(N, Setcc); | |||
49003 | // Replace other uses with a truncate of the widened setcc_carry. | |||
49004 | if (ReplaceOtherUses) { | |||
49005 | SDValue Trunc = DAG.getNode(ISD::TRUNCATE, SDLoc(N0), | |||
49006 | N0.getValueType(), Setcc); | |||
49007 | DCI.CombineTo(N0.getNode(), Trunc); | |||
49008 | } | |||
49009 | ||||
49010 | return SDValue(N, 0); | |||
49011 | } | |||
49012 | ||||
49013 | if (SDValue NewCMov = combineToExtendCMOV(N, DAG)) | |||
49014 | return NewCMov; | |||
49015 | ||||
49016 | if (!DCI.isBeforeLegalizeOps()) | |||
49017 | return SDValue(); | |||
49018 | ||||
49019 | if (SDValue V = combineExtSetcc(N, DAG, Subtarget)) | |||
49020 | return V; | |||
49021 | ||||
49022 | if (SDValue V = combineToExtendBoolVectorInReg(N, DAG, DCI, Subtarget)) | |||
49023 | return V; | |||
49024 | ||||
49025 | if (VT.isVector()) { | |||
49026 | if (SDValue R = PromoteMaskArithmetic(N, DAG, Subtarget)) | |||
49027 | return R; | |||
49028 | ||||
49029 | if (N0.getOpcode() == ISD::SIGN_EXTEND_VECTOR_INREG) | |||
49030 | return DAG.getNode(N0.getOpcode(), DL, VT, N0.getOperand(0)); | |||
49031 | } | |||
49032 | ||||
49033 | if (SDValue NewAdd = promoteExtBeforeAdd(N, DAG, Subtarget)) | |||
49034 | return NewAdd; | |||
49035 | ||||
49036 | return SDValue(); | |||
49037 | } | |||
49038 | ||||
49039 | static SDValue combineFMA(SDNode *N, SelectionDAG &DAG, | |||
49040 | TargetLowering::DAGCombinerInfo &DCI, | |||
49041 | const X86Subtarget &Subtarget) { | |||
49042 | SDLoc dl(N); | |||
49043 | EVT VT = N->getValueType(0); | |||
49044 | bool IsStrict = N->isStrictFPOpcode() || N->isTargetStrictFPOpcode(); | |||
49045 | ||||
49046 | // Let legalize expand this if it isn't a legal type yet. | |||
49047 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
49048 | if (!TLI.isTypeLegal(VT)) | |||
49049 | return SDValue(); | |||
49050 | ||||
49051 | SDValue A = N->getOperand(IsStrict ? 1 : 0); | |||
49052 | SDValue B = N->getOperand(IsStrict ? 2 : 1); | |||
49053 | SDValue C = N->getOperand(IsStrict ? 3 : 2); | |||
49054 | ||||
49055 | // If the operation allows fast-math and the target does not support FMA, | |||
49056 | // split this into mul+add to avoid libcall(s). | |||
49057 | SDNodeFlags Flags = N->getFlags(); | |||
49058 | if (!IsStrict && Flags.hasAllowReassociation() && | |||
49059 | TLI.isOperationExpand(ISD::FMA, VT)) { | |||
49060 | SDValue Fmul = DAG.getNode(ISD::FMUL, dl, VT, A, B, Flags); | |||
49061 | return DAG.getNode(ISD::FADD, dl, VT, Fmul, C, Flags); | |||
49062 | } | |||
49063 | ||||
49064 | EVT ScalarVT = VT.getScalarType(); | |||
49065 | if (((ScalarVT != MVT::f32 && ScalarVT != MVT::f64) || | |||
49066 | !Subtarget.hasAnyFMA()) && | |||
49067 | !(ScalarVT == MVT::f16 && Subtarget.hasFP16())) | |||
49068 | return SDValue(); | |||
49069 | ||||
49070 | auto invertIfNegative = [&DAG, &TLI, &DCI](SDValue &V) { | |||
49071 | bool CodeSize = DAG.getMachineFunction().getFunction().hasOptSize(); | |||
49072 | bool LegalOperations = !DCI.isBeforeLegalizeOps(); | |||
49073 | if (SDValue NegV = TLI.getCheaperNegatedExpression(V, DAG, LegalOperations, | |||
49074 | CodeSize)) { | |||
49075 | V = NegV; | |||
49076 | return true; | |||
49077 | } | |||
49078 | // Look through extract_vector_elts. If it comes from an FNEG, create a | |||
49079 | // new extract from the FNEG input. | |||
49080 | if (V.getOpcode() == ISD::EXTRACT_VECTOR_ELT && | |||
49081 | isNullConstant(V.getOperand(1))) { | |||
49082 | SDValue Vec = V.getOperand(0); | |||
49083 | if (SDValue NegV = TLI.getCheaperNegatedExpression( | |||
49084 | Vec, DAG, LegalOperations, CodeSize)) { | |||
49085 | V = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, SDLoc(V), V.getValueType(), | |||
49086 | NegV, V.getOperand(1)); | |||
49087 | return true; | |||
49088 | } | |||
49089 | } | |||
49090 | ||||
49091 | return false; | |||
49092 | }; | |||
49093 | ||||
49094 | // Do not convert the passthru input of scalar intrinsics. | |||
49095 | // FIXME: We could allow negations of the lower element only. | |||
49096 | bool NegA = invertIfNegative(A); | |||
49097 | bool NegB = invertIfNegative(B); | |||
49098 | bool NegC = invertIfNegative(C); | |||
49099 | ||||
49100 | if (!NegA && !NegB && !NegC) | |||
49101 | return SDValue(); | |||
49102 | ||||
49103 | unsigned NewOpcode = | |||
49104 | negateFMAOpcode(N->getOpcode(), NegA != NegB, NegC, false); | |||
49105 | ||||
49106 | // Propagate fast-math-flags to new FMA node. | |||
49107 | SelectionDAG::FlagInserter FlagsInserter(DAG, Flags); | |||
49108 | if (IsStrict) { | |||
49109 | assert(N->getNumOperands() == 4 && "Shouldn't be greater than 4")(static_cast <bool> (N->getNumOperands() == 4 && "Shouldn't be greater than 4") ? void (0) : __assert_fail ("N->getNumOperands() == 4 && \"Shouldn't be greater than 4\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 49109, __extension__ __PRETTY_FUNCTION__)); | |||
49110 | return DAG.getNode(NewOpcode, dl, {VT, MVT::Other}, | |||
49111 | {N->getOperand(0), A, B, C}); | |||
49112 | } else { | |||
49113 | if (N->getNumOperands() == 4) | |||
49114 | return DAG.getNode(NewOpcode, dl, VT, A, B, C, N->getOperand(3)); | |||
49115 | return DAG.getNode(NewOpcode, dl, VT, A, B, C); | |||
49116 | } | |||
49117 | } | |||
49118 | ||||
49119 | // Combine FMADDSUB(A, B, FNEG(C)) -> FMSUBADD(A, B, C) | |||
49120 | // Combine FMSUBADD(A, B, FNEG(C)) -> FMADDSUB(A, B, C) | |||
49121 | static SDValue combineFMADDSUB(SDNode *N, SelectionDAG &DAG, | |||
49122 | TargetLowering::DAGCombinerInfo &DCI) { | |||
49123 | SDLoc dl(N); | |||
49124 | EVT VT = N->getValueType(0); | |||
49125 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
49126 | bool CodeSize = DAG.getMachineFunction().getFunction().hasOptSize(); | |||
49127 | bool LegalOperations = !DCI.isBeforeLegalizeOps(); | |||
49128 | ||||
49129 | SDValue N2 = N->getOperand(2); | |||
49130 | ||||
49131 | SDValue NegN2 = | |||
49132 | TLI.getCheaperNegatedExpression(N2, DAG, LegalOperations, CodeSize); | |||
49133 | if (!NegN2) | |||
49134 | return SDValue(); | |||
49135 | unsigned NewOpcode = negateFMAOpcode(N->getOpcode(), false, true, false); | |||
49136 | ||||
49137 | if (N->getNumOperands() == 4) | |||
49138 | return DAG.getNode(NewOpcode, dl, VT, N->getOperand(0), N->getOperand(1), | |||
49139 | NegN2, N->getOperand(3)); | |||
49140 | return DAG.getNode(NewOpcode, dl, VT, N->getOperand(0), N->getOperand(1), | |||
49141 | NegN2); | |||
49142 | } | |||
49143 | ||||
49144 | static SDValue combineZext(SDNode *N, SelectionDAG &DAG, | |||
49145 | TargetLowering::DAGCombinerInfo &DCI, | |||
49146 | const X86Subtarget &Subtarget) { | |||
49147 | SDLoc dl(N); | |||
49148 | SDValue N0 = N->getOperand(0); | |||
49149 | EVT VT = N->getValueType(0); | |||
49150 | ||||
49151 | // (i32 (aext (i8 (x86isd::setcc_carry)))) -> (i32 (x86isd::setcc_carry)) | |||
49152 | // FIXME: Is this needed? We don't seem to have any tests for it. | |||
49153 | if (!DCI.isBeforeLegalizeOps() && N->getOpcode() == ISD::ANY_EXTEND && | |||
49154 | N0.getOpcode() == X86ISD::SETCC_CARRY) { | |||
49155 | SDValue Setcc = DAG.getNode(X86ISD::SETCC_CARRY, dl, VT, N0->getOperand(0), | |||
49156 | N0->getOperand(1)); | |||
49157 | bool ReplaceOtherUses = !N0.hasOneUse(); | |||
49158 | DCI.CombineTo(N, Setcc); | |||
49159 | // Replace other uses with a truncate of the widened setcc_carry. | |||
49160 | if (ReplaceOtherUses) { | |||
49161 | SDValue Trunc = DAG.getNode(ISD::TRUNCATE, SDLoc(N0), | |||
49162 | N0.getValueType(), Setcc); | |||
49163 | DCI.CombineTo(N0.getNode(), Trunc); | |||
49164 | } | |||
49165 | ||||
49166 | return SDValue(N, 0); | |||
49167 | } | |||
49168 | ||||
49169 | if (SDValue NewCMov = combineToExtendCMOV(N, DAG)) | |||
49170 | return NewCMov; | |||
49171 | ||||
49172 | if (DCI.isBeforeLegalizeOps()) | |||
49173 | if (SDValue V = combineExtSetcc(N, DAG, Subtarget)) | |||
49174 | return V; | |||
49175 | ||||
49176 | if (SDValue V = combineToExtendBoolVectorInReg(N, DAG, DCI, Subtarget)) | |||
49177 | return V; | |||
49178 | ||||
49179 | if (VT.isVector()) | |||
49180 | if (SDValue R = PromoteMaskArithmetic(N, DAG, Subtarget)) | |||
49181 | return R; | |||
49182 | ||||
49183 | if (SDValue NewAdd = promoteExtBeforeAdd(N, DAG, Subtarget)) | |||
49184 | return NewAdd; | |||
49185 | ||||
49186 | if (SDValue R = combineOrCmpEqZeroToCtlzSrl(N, DAG, DCI, Subtarget)) | |||
49187 | return R; | |||
49188 | ||||
49189 | // TODO: Combine with any target/faux shuffle. | |||
49190 | if (N0.getOpcode() == X86ISD::PACKUS && N0.getValueSizeInBits() == 128 && | |||
49191 | VT.getScalarSizeInBits() == N0.getOperand(0).getScalarValueSizeInBits()) { | |||
49192 | SDValue N00 = N0.getOperand(0); | |||
49193 | SDValue N01 = N0.getOperand(1); | |||
49194 | unsigned NumSrcEltBits = N00.getScalarValueSizeInBits(); | |||
49195 | APInt ZeroMask = APInt::getHighBitsSet(NumSrcEltBits, NumSrcEltBits / 2); | |||
49196 | if ((N00.isUndef() || DAG.MaskedValueIsZero(N00, ZeroMask)) && | |||
49197 | (N01.isUndef() || DAG.MaskedValueIsZero(N01, ZeroMask))) { | |||
49198 | return concatSubVectors(N00, N01, DAG, dl); | |||
49199 | } | |||
49200 | } | |||
49201 | ||||
49202 | return SDValue(); | |||
49203 | } | |||
49204 | ||||
49205 | /// Recursive helper for combineVectorSizedSetCCEquality() to see if we have a | |||
49206 | /// recognizable memcmp expansion. | |||
49207 | static bool isOrXorXorTree(SDValue X, bool Root = true) { | |||
49208 | if (X.getOpcode() == ISD::OR) | |||
49209 | return isOrXorXorTree(X.getOperand(0), false) && | |||
49210 | isOrXorXorTree(X.getOperand(1), false); | |||
49211 | if (Root) | |||
49212 | return false; | |||
49213 | return X.getOpcode() == ISD::XOR; | |||
49214 | } | |||
49215 | ||||
49216 | /// Recursive helper for combineVectorSizedSetCCEquality() to emit the memcmp | |||
49217 | /// expansion. | |||
49218 | template<typename F> | |||
49219 | static SDValue emitOrXorXorTree(SDValue X, SDLoc &DL, SelectionDAG &DAG, | |||
49220 | EVT VecVT, EVT CmpVT, bool HasPT, F SToV) { | |||
49221 | SDValue Op0 = X.getOperand(0); | |||
49222 | SDValue Op1 = X.getOperand(1); | |||
49223 | if (X.getOpcode() == ISD::OR) { | |||
49224 | SDValue A = emitOrXorXorTree(Op0, DL, DAG, VecVT, CmpVT, HasPT, SToV); | |||
49225 | SDValue B = emitOrXorXorTree(Op1, DL, DAG, VecVT, CmpVT, HasPT, SToV); | |||
49226 | if (VecVT != CmpVT) | |||
49227 | return DAG.getNode(ISD::OR, DL, CmpVT, A, B); | |||
49228 | if (HasPT) | |||
49229 | return DAG.getNode(ISD::OR, DL, VecVT, A, B); | |||
49230 | return DAG.getNode(ISD::AND, DL, CmpVT, A, B); | |||
49231 | } else if (X.getOpcode() == ISD::XOR) { | |||
49232 | SDValue A = SToV(Op0); | |||
49233 | SDValue B = SToV(Op1); | |||
49234 | if (VecVT != CmpVT) | |||
49235 | return DAG.getSetCC(DL, CmpVT, A, B, ISD::SETNE); | |||
49236 | if (HasPT) | |||
49237 | return DAG.getNode(ISD::XOR, DL, VecVT, A, B); | |||
49238 | return DAG.getSetCC(DL, CmpVT, A, B, ISD::SETEQ); | |||
49239 | } | |||
49240 | llvm_unreachable("Impossible")::llvm::llvm_unreachable_internal("Impossible", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 49240); | |||
49241 | } | |||
49242 | ||||
49243 | /// Try to map a 128-bit or larger integer comparison to vector instructions | |||
49244 | /// before type legalization splits it up into chunks. | |||
49245 | static SDValue combineVectorSizedSetCCEquality(SDNode *SetCC, SelectionDAG &DAG, | |||
49246 | const X86Subtarget &Subtarget) { | |||
49247 | ISD::CondCode CC = cast<CondCodeSDNode>(SetCC->getOperand(2))->get(); | |||
49248 | assert((CC == ISD::SETNE || CC == ISD::SETEQ) && "Bad comparison predicate")(static_cast <bool> ((CC == ISD::SETNE || CC == ISD::SETEQ ) && "Bad comparison predicate") ? void (0) : __assert_fail ("(CC == ISD::SETNE || CC == ISD::SETEQ) && \"Bad comparison predicate\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 49248, __extension__ __PRETTY_FUNCTION__)); | |||
49249 | ||||
49250 | // We're looking for an oversized integer equality comparison. | |||
49251 | SDValue X = SetCC->getOperand(0); | |||
49252 | SDValue Y = SetCC->getOperand(1); | |||
49253 | EVT OpVT = X.getValueType(); | |||
49254 | unsigned OpSize = OpVT.getSizeInBits(); | |||
49255 | if (!OpVT.isScalarInteger() || OpSize < 128) | |||
49256 | return SDValue(); | |||
49257 | ||||
49258 | // Ignore a comparison with zero because that gets special treatment in | |||
49259 | // EmitTest(). But make an exception for the special case of a pair of | |||
49260 | // logically-combined vector-sized operands compared to zero. This pattern may | |||
49261 | // be generated by the memcmp expansion pass with oversized integer compares | |||
49262 | // (see PR33325). | |||
49263 | bool IsOrXorXorTreeCCZero = isNullConstant(Y) && isOrXorXorTree(X); | |||
49264 | if (isNullConstant(Y) && !IsOrXorXorTreeCCZero) | |||
49265 | return SDValue(); | |||
49266 | ||||
49267 | // Don't perform this combine if constructing the vector will be expensive. | |||
49268 | auto IsVectorBitCastCheap = [](SDValue X) { | |||
49269 | X = peekThroughBitcasts(X); | |||
49270 | return isa<ConstantSDNode>(X) || X.getValueType().isVector() || | |||
49271 | X.getOpcode() == ISD::LOAD; | |||
49272 | }; | |||
49273 | if ((!IsVectorBitCastCheap(X) || !IsVectorBitCastCheap(Y)) && | |||
49274 | !IsOrXorXorTreeCCZero) | |||
49275 | return SDValue(); | |||
49276 | ||||
49277 | EVT VT = SetCC->getValueType(0); | |||
49278 | SDLoc DL(SetCC); | |||
49279 | ||||
49280 | // Use XOR (plus OR) and PTEST after SSE4.1 for 128/256-bit operands. | |||
49281 | // Use PCMPNEQ (plus OR) and KORTEST for 512-bit operands. | |||
49282 | // Otherwise use PCMPEQ (plus AND) and mask testing. | |||
49283 | if ((OpSize == 128 && Subtarget.hasSSE2()) || | |||
49284 | (OpSize == 256 && Subtarget.hasAVX()) || | |||
49285 | (OpSize == 512 && Subtarget.useAVX512Regs())) { | |||
49286 | bool HasPT = Subtarget.hasSSE41(); | |||
49287 | ||||
49288 | // PTEST and MOVMSK are slow on Knights Landing and Knights Mill and widened | |||
49289 | // vector registers are essentially free. (Technically, widening registers | |||
49290 | // prevents load folding, but the tradeoff is worth it.) | |||
49291 | bool PreferKOT = Subtarget.preferMaskRegisters(); | |||
49292 | bool NeedZExt = PreferKOT && !Subtarget.hasVLX() && OpSize != 512; | |||
49293 | ||||
49294 | EVT VecVT = MVT::v16i8; | |||
49295 | EVT CmpVT = PreferKOT ? MVT::v16i1 : VecVT; | |||
49296 | if (OpSize == 256) { | |||
49297 | VecVT = MVT::v32i8; | |||
49298 | CmpVT = PreferKOT ? MVT::v32i1 : VecVT; | |||
49299 | } | |||
49300 | EVT CastVT = VecVT; | |||
49301 | bool NeedsAVX512FCast = false; | |||
49302 | if (OpSize == 512 || NeedZExt) { | |||
49303 | if (Subtarget.hasBWI()) { | |||
49304 | VecVT = MVT::v64i8; | |||
49305 | CmpVT = MVT::v64i1; | |||
49306 | if (OpSize == 512) | |||
49307 | CastVT = VecVT; | |||
49308 | } else { | |||
49309 | VecVT = MVT::v16i32; | |||
49310 | CmpVT = MVT::v16i1; | |||
49311 | CastVT = OpSize == 512 ? VecVT : | |||
49312 | OpSize == 256 ? MVT::v8i32 : MVT::v4i32; | |||
49313 | NeedsAVX512FCast = true; | |||
49314 | } | |||
49315 | } | |||
49316 | ||||
49317 | auto ScalarToVector = [&](SDValue X) -> SDValue { | |||
49318 | bool TmpZext = false; | |||
49319 | EVT TmpCastVT = CastVT; | |||
49320 | if (X.getOpcode() == ISD::ZERO_EXTEND) { | |||
49321 | SDValue OrigX = X.getOperand(0); | |||
49322 | unsigned OrigSize = OrigX.getScalarValueSizeInBits(); | |||
49323 | if (OrigSize < OpSize) { | |||
49324 | if (OrigSize == 128) { | |||
49325 | TmpCastVT = NeedsAVX512FCast ? MVT::v4i32 : MVT::v16i8; | |||
49326 | X = OrigX; | |||
49327 | TmpZext = true; | |||
49328 | } else if (OrigSize == 256) { | |||
49329 | TmpCastVT = NeedsAVX512FCast ? MVT::v8i32 : MVT::v32i8; | |||
49330 | X = OrigX; | |||
49331 | TmpZext = true; | |||
49332 | } | |||
49333 | } | |||
49334 | } | |||
49335 | X = DAG.getBitcast(TmpCastVT, X); | |||
49336 | if (!NeedZExt && !TmpZext) | |||
49337 | return X; | |||
49338 | return DAG.getNode(ISD::INSERT_SUBVECTOR, DL, VecVT, | |||
49339 | DAG.getConstant(0, DL, VecVT), X, | |||
49340 | DAG.getVectorIdxConstant(0, DL)); | |||
49341 | }; | |||
49342 | ||||
49343 | SDValue Cmp; | |||
49344 | if (IsOrXorXorTreeCCZero) { | |||
49345 | // This is a bitwise-combined equality comparison of 2 pairs of vectors: | |||
49346 | // setcc i128 (or (xor A, B), (xor C, D)), 0, eq|ne | |||
49347 | // Use 2 vector equality compares and 'and' the results before doing a | |||
49348 | // MOVMSK. | |||
49349 | Cmp = emitOrXorXorTree(X, DL, DAG, VecVT, CmpVT, HasPT, ScalarToVector); | |||
49350 | } else { | |||
49351 | SDValue VecX = ScalarToVector(X); | |||
49352 | SDValue VecY = ScalarToVector(Y); | |||
49353 | if (VecVT != CmpVT) { | |||
49354 | Cmp = DAG.getSetCC(DL, CmpVT, VecX, VecY, ISD::SETNE); | |||
49355 | } else if (HasPT) { | |||
49356 | Cmp = DAG.getNode(ISD::XOR, DL, VecVT, VecX, VecY); | |||
49357 | } else { | |||
49358 | Cmp = DAG.getSetCC(DL, CmpVT, VecX, VecY, ISD::SETEQ); | |||
49359 | } | |||
49360 | } | |||
49361 | // AVX512 should emit a setcc that will lower to kortest. | |||
49362 | if (VecVT != CmpVT) { | |||
49363 | EVT KRegVT = CmpVT == MVT::v64i1 ? MVT::i64 : | |||
49364 | CmpVT == MVT::v32i1 ? MVT::i32 : MVT::i16; | |||
49365 | return DAG.getSetCC(DL, VT, DAG.getBitcast(KRegVT, Cmp), | |||
49366 | DAG.getConstant(0, DL, KRegVT), CC); | |||
49367 | } | |||
49368 | if (HasPT) { | |||
49369 | SDValue BCCmp = DAG.getBitcast(OpSize == 256 ? MVT::v4i64 : MVT::v2i64, | |||
49370 | Cmp); | |||
49371 | SDValue PT = DAG.getNode(X86ISD::PTEST, DL, MVT::i32, BCCmp, BCCmp); | |||
49372 | X86::CondCode X86CC = CC == ISD::SETEQ ? X86::COND_E : X86::COND_NE; | |||
49373 | SDValue X86SetCC = getSETCC(X86CC, PT, DL, DAG); | |||
49374 | return DAG.getNode(ISD::TRUNCATE, DL, VT, X86SetCC.getValue(0)); | |||
49375 | } | |||
49376 | // If all bytes match (bitmask is 0x(FFFF)FFFF), that's equality. | |||
49377 | // setcc i128 X, Y, eq --> setcc (pmovmskb (pcmpeqb X, Y)), 0xFFFF, eq | |||
49378 | // setcc i128 X, Y, ne --> setcc (pmovmskb (pcmpeqb X, Y)), 0xFFFF, ne | |||
49379 | assert(Cmp.getValueType() == MVT::v16i8 &&(static_cast <bool> (Cmp.getValueType() == MVT::v16i8 && "Non 128-bit vector on pre-SSE41 target") ? void (0) : __assert_fail ("Cmp.getValueType() == MVT::v16i8 && \"Non 128-bit vector on pre-SSE41 target\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 49380, __extension__ __PRETTY_FUNCTION__)) | |||
49380 | "Non 128-bit vector on pre-SSE41 target")(static_cast <bool> (Cmp.getValueType() == MVT::v16i8 && "Non 128-bit vector on pre-SSE41 target") ? void (0) : __assert_fail ("Cmp.getValueType() == MVT::v16i8 && \"Non 128-bit vector on pre-SSE41 target\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 49380, __extension__ __PRETTY_FUNCTION__)); | |||
49381 | SDValue MovMsk = DAG.getNode(X86ISD::MOVMSK, DL, MVT::i32, Cmp); | |||
49382 | SDValue FFFFs = DAG.getConstant(0xFFFF, DL, MVT::i32); | |||
49383 | return DAG.getSetCC(DL, VT, MovMsk, FFFFs, CC); | |||
49384 | } | |||
49385 | ||||
49386 | return SDValue(); | |||
49387 | } | |||
49388 | ||||
49389 | static SDValue combineSetCC(SDNode *N, SelectionDAG &DAG, | |||
49390 | TargetLowering::DAGCombinerInfo &DCI, | |||
49391 | const X86Subtarget &Subtarget) { | |||
49392 | const ISD::CondCode CC = cast<CondCodeSDNode>(N->getOperand(2))->get(); | |||
49393 | const SDValue LHS = N->getOperand(0); | |||
49394 | const SDValue RHS = N->getOperand(1); | |||
49395 | EVT VT = N->getValueType(0); | |||
49396 | EVT OpVT = LHS.getValueType(); | |||
49397 | SDLoc DL(N); | |||
49398 | ||||
49399 | if (CC == ISD::SETNE || CC == ISD::SETEQ) { | |||
49400 | if (SDValue V = combineVectorSizedSetCCEquality(N, DAG, Subtarget)) | |||
49401 | return V; | |||
49402 | ||||
49403 | if (VT == MVT::i1 && isNullConstant(RHS)) { | |||
49404 | SDValue X86CC; | |||
49405 | if (SDValue V = | |||
49406 | MatchVectorAllZeroTest(LHS, CC, DL, Subtarget, DAG, X86CC)) | |||
49407 | return DAG.getNode(ISD::TRUNCATE, DL, VT, | |||
49408 | DAG.getNode(X86ISD::SETCC, DL, MVT::i8, X86CC, V)); | |||
49409 | } | |||
49410 | ||||
49411 | if (OpVT.isScalarInteger()) { | |||
49412 | // cmpeq(or(X,Y),X) --> cmpeq(and(~X,Y),0) | |||
49413 | // cmpne(or(X,Y),X) --> cmpne(and(~X,Y),0) | |||
49414 | auto MatchOrCmpEq = [&](SDValue N0, SDValue N1) { | |||
49415 | if (N0.getOpcode() == ISD::OR && N0->hasOneUse()) { | |||
49416 | if (N0.getOperand(0) == N1) | |||
49417 | return DAG.getNode(ISD::AND, DL, OpVT, DAG.getNOT(DL, N1, OpVT), | |||
49418 | N0.getOperand(1)); | |||
49419 | if (N0.getOperand(1) == N1) | |||
49420 | return DAG.getNode(ISD::AND, DL, OpVT, DAG.getNOT(DL, N1, OpVT), | |||
49421 | N0.getOperand(0)); | |||
49422 | } | |||
49423 | return SDValue(); | |||
49424 | }; | |||
49425 | if (SDValue AndN = MatchOrCmpEq(LHS, RHS)) | |||
49426 | return DAG.getSetCC(DL, VT, AndN, DAG.getConstant(0, DL, OpVT), CC); | |||
49427 | if (SDValue AndN = MatchOrCmpEq(RHS, LHS)) | |||
49428 | return DAG.getSetCC(DL, VT, AndN, DAG.getConstant(0, DL, OpVT), CC); | |||
49429 | ||||
49430 | // cmpeq(and(X,Y),Y) --> cmpeq(and(~X,Y),0) | |||
49431 | // cmpne(and(X,Y),Y) --> cmpne(and(~X,Y),0) | |||
49432 | auto MatchAndCmpEq = [&](SDValue N0, SDValue N1) { | |||
49433 | if (N0.getOpcode() == ISD::AND && N0->hasOneUse()) { | |||
49434 | if (N0.getOperand(0) == N1) | |||
49435 | return DAG.getNode(ISD::AND, DL, OpVT, N1, | |||
49436 | DAG.getNOT(DL, N0.getOperand(1), OpVT)); | |||
49437 | if (N0.getOperand(1) == N1) | |||
49438 | return DAG.getNode(ISD::AND, DL, OpVT, N1, | |||
49439 | DAG.getNOT(DL, N0.getOperand(0), OpVT)); | |||
49440 | } | |||
49441 | return SDValue(); | |||
49442 | }; | |||
49443 | if (SDValue AndN = MatchAndCmpEq(LHS, RHS)) | |||
49444 | return DAG.getSetCC(DL, VT, AndN, DAG.getConstant(0, DL, OpVT), CC); | |||
49445 | if (SDValue AndN = MatchAndCmpEq(RHS, LHS)) | |||
49446 | return DAG.getSetCC(DL, VT, AndN, DAG.getConstant(0, DL, OpVT), CC); | |||
49447 | ||||
49448 | // cmpeq(trunc(x),0) --> cmpeq(x,0) | |||
49449 | // cmpne(trunc(x),0) --> cmpne(x,0) | |||
49450 | // iff x upper bits are zero. | |||
49451 | // TODO: Add support for RHS to be truncate as well? | |||
49452 | if (LHS.getOpcode() == ISD::TRUNCATE && | |||
49453 | LHS.getOperand(0).getScalarValueSizeInBits() >= 32 && | |||
49454 | isNullConstant(RHS) && !DCI.isBeforeLegalize()) { | |||
49455 | EVT SrcVT = LHS.getOperand(0).getValueType(); | |||
49456 | APInt UpperBits = APInt::getBitsSetFrom(SrcVT.getScalarSizeInBits(), | |||
49457 | OpVT.getScalarSizeInBits()); | |||
49458 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
49459 | if (DAG.MaskedValueIsZero(LHS.getOperand(0), UpperBits) && | |||
49460 | TLI.isTypeLegal(LHS.getOperand(0).getValueType())) | |||
49461 | return DAG.getSetCC(DL, VT, LHS.getOperand(0), | |||
49462 | DAG.getConstant(0, DL, SrcVT), CC); | |||
49463 | } | |||
49464 | } | |||
49465 | } | |||
49466 | ||||
49467 | if (VT.isVector() && VT.getVectorElementType() == MVT::i1 && | |||
49468 | (CC == ISD::SETNE || CC == ISD::SETEQ || ISD::isSignedIntSetCC(CC))) { | |||
49469 | // Using temporaries to avoid messing up operand ordering for later | |||
49470 | // transformations if this doesn't work. | |||
49471 | SDValue Op0 = LHS; | |||
49472 | SDValue Op1 = RHS; | |||
49473 | ISD::CondCode TmpCC = CC; | |||
49474 | // Put build_vector on the right. | |||
49475 | if (Op0.getOpcode() == ISD::BUILD_VECTOR) { | |||
49476 | std::swap(Op0, Op1); | |||
49477 | TmpCC = ISD::getSetCCSwappedOperands(TmpCC); | |||
49478 | } | |||
49479 | ||||
49480 | bool IsSEXT0 = | |||
49481 | (Op0.getOpcode() == ISD::SIGN_EXTEND) && | |||
49482 | (Op0.getOperand(0).getValueType().getVectorElementType() == MVT::i1); | |||
49483 | bool IsVZero1 = ISD::isBuildVectorAllZeros(Op1.getNode()); | |||
49484 | ||||
49485 | if (IsSEXT0 && IsVZero1) { | |||
49486 | assert(VT == Op0.getOperand(0).getValueType() &&(static_cast <bool> (VT == Op0.getOperand(0).getValueType () && "Unexpected operand type") ? void (0) : __assert_fail ("VT == Op0.getOperand(0).getValueType() && \"Unexpected operand type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 49487, __extension__ __PRETTY_FUNCTION__)) | |||
49487 | "Unexpected operand type")(static_cast <bool> (VT == Op0.getOperand(0).getValueType () && "Unexpected operand type") ? void (0) : __assert_fail ("VT == Op0.getOperand(0).getValueType() && \"Unexpected operand type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 49487, __extension__ __PRETTY_FUNCTION__)); | |||
49488 | if (TmpCC == ISD::SETGT) | |||
49489 | return DAG.getConstant(0, DL, VT); | |||
49490 | if (TmpCC == ISD::SETLE) | |||
49491 | return DAG.getConstant(1, DL, VT); | |||
49492 | if (TmpCC == ISD::SETEQ || TmpCC == ISD::SETGE) | |||
49493 | return DAG.getNOT(DL, Op0.getOperand(0), VT); | |||
49494 | ||||
49495 | assert((TmpCC == ISD::SETNE || TmpCC == ISD::SETLT) &&(static_cast <bool> ((TmpCC == ISD::SETNE || TmpCC == ISD ::SETLT) && "Unexpected condition code!") ? void (0) : __assert_fail ("(TmpCC == ISD::SETNE || TmpCC == ISD::SETLT) && \"Unexpected condition code!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 49496, __extension__ __PRETTY_FUNCTION__)) | |||
49496 | "Unexpected condition code!")(static_cast <bool> ((TmpCC == ISD::SETNE || TmpCC == ISD ::SETLT) && "Unexpected condition code!") ? void (0) : __assert_fail ("(TmpCC == ISD::SETNE || TmpCC == ISD::SETLT) && \"Unexpected condition code!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 49496, __extension__ __PRETTY_FUNCTION__)); | |||
49497 | return Op0.getOperand(0); | |||
49498 | } | |||
49499 | } | |||
49500 | ||||
49501 | // If we have AVX512, but not BWI and this is a vXi16/vXi8 setcc, just | |||
49502 | // pre-promote its result type since vXi1 vectors don't get promoted | |||
49503 | // during type legalization. | |||
49504 | // NOTE: The element count check is to ignore operand types that need to | |||
49505 | // go through type promotion to a 128-bit vector. | |||
49506 | if (Subtarget.hasAVX512() && !Subtarget.hasBWI() && VT.isVector() && | |||
49507 | VT.getVectorElementType() == MVT::i1 && | |||
49508 | (OpVT.getVectorElementType() == MVT::i8 || | |||
49509 | OpVT.getVectorElementType() == MVT::i16)) { | |||
49510 | SDValue Setcc = DAG.getSetCC(DL, OpVT, LHS, RHS, CC); | |||
49511 | return DAG.getNode(ISD::TRUNCATE, DL, VT, Setcc); | |||
49512 | } | |||
49513 | ||||
49514 | // For an SSE1-only target, lower a comparison of v4f32 to X86ISD::CMPP early | |||
49515 | // to avoid scalarization via legalization because v4i32 is not a legal type. | |||
49516 | if (Subtarget.hasSSE1() && !Subtarget.hasSSE2() && VT == MVT::v4i32 && | |||
49517 | LHS.getValueType() == MVT::v4f32) | |||
49518 | return LowerVSETCC(SDValue(N, 0), Subtarget, DAG); | |||
49519 | ||||
49520 | return SDValue(); | |||
49521 | } | |||
49522 | ||||
49523 | static SDValue combineMOVMSK(SDNode *N, SelectionDAG &DAG, | |||
49524 | TargetLowering::DAGCombinerInfo &DCI, | |||
49525 | const X86Subtarget &Subtarget) { | |||
49526 | SDValue Src = N->getOperand(0); | |||
49527 | MVT SrcVT = Src.getSimpleValueType(); | |||
49528 | MVT VT = N->getSimpleValueType(0); | |||
49529 | unsigned NumBits = VT.getScalarSizeInBits(); | |||
49530 | unsigned NumElts = SrcVT.getVectorNumElements(); | |||
49531 | ||||
49532 | // Perform constant folding. | |||
49533 | if (ISD::isBuildVectorOfConstantSDNodes(Src.getNode())) { | |||
49534 | assert(VT == MVT::i32 && "Unexpected result type")(static_cast <bool> (VT == MVT::i32 && "Unexpected result type" ) ? void (0) : __assert_fail ("VT == MVT::i32 && \"Unexpected result type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 49534, __extension__ __PRETTY_FUNCTION__)); | |||
49535 | APInt Imm(32, 0); | |||
49536 | for (unsigned Idx = 0, e = Src.getNumOperands(); Idx < e; ++Idx) { | |||
49537 | if (!Src.getOperand(Idx).isUndef() && | |||
49538 | Src.getConstantOperandAPInt(Idx).isNegative()) | |||
49539 | Imm.setBit(Idx); | |||
49540 | } | |||
49541 | return DAG.getConstant(Imm, SDLoc(N), VT); | |||
49542 | } | |||
49543 | ||||
49544 | // Look through int->fp bitcasts that don't change the element width. | |||
49545 | unsigned EltWidth = SrcVT.getScalarSizeInBits(); | |||
49546 | if (Subtarget.hasSSE2() && Src.getOpcode() == ISD::BITCAST && | |||
49547 | Src.getOperand(0).getScalarValueSizeInBits() == EltWidth) | |||
49548 | return DAG.getNode(X86ISD::MOVMSK, SDLoc(N), VT, Src.getOperand(0)); | |||
49549 | ||||
49550 | // Fold movmsk(not(x)) -> not(movmsk(x)) to improve folding of movmsk results | |||
49551 | // with scalar comparisons. | |||
49552 | if (SDValue NotSrc = IsNOT(Src, DAG)) { | |||
49553 | SDLoc DL(N); | |||
49554 | APInt NotMask = APInt::getLowBitsSet(NumBits, NumElts); | |||
49555 | NotSrc = DAG.getBitcast(SrcVT, NotSrc); | |||
49556 | return DAG.getNode(ISD::XOR, DL, VT, | |||
49557 | DAG.getNode(X86ISD::MOVMSK, DL, VT, NotSrc), | |||
49558 | DAG.getConstant(NotMask, DL, VT)); | |||
49559 | } | |||
49560 | ||||
49561 | // Fold movmsk(icmp_sgt(x,-1)) -> not(movmsk(x)) to improve folding of movmsk | |||
49562 | // results with scalar comparisons. | |||
49563 | if (Src.getOpcode() == X86ISD::PCMPGT && | |||
49564 | ISD::isBuildVectorAllOnes(Src.getOperand(1).getNode())) { | |||
49565 | SDLoc DL(N); | |||
49566 | APInt NotMask = APInt::getLowBitsSet(NumBits, NumElts); | |||
49567 | return DAG.getNode(ISD::XOR, DL, VT, | |||
49568 | DAG.getNode(X86ISD::MOVMSK, DL, VT, Src.getOperand(0)), | |||
49569 | DAG.getConstant(NotMask, DL, VT)); | |||
49570 | } | |||
49571 | ||||
49572 | // Simplify the inputs. | |||
49573 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
49574 | APInt DemandedMask(APInt::getAllOnesValue(NumBits)); | |||
49575 | if (TLI.SimplifyDemandedBits(SDValue(N, 0), DemandedMask, DCI)) | |||
49576 | return SDValue(N, 0); | |||
49577 | ||||
49578 | return SDValue(); | |||
49579 | } | |||
49580 | ||||
49581 | static SDValue combineX86GatherScatter(SDNode *N, SelectionDAG &DAG, | |||
49582 | TargetLowering::DAGCombinerInfo &DCI) { | |||
49583 | // With vector masks we only demand the upper bit of the mask. | |||
49584 | SDValue Mask = cast<X86MaskedGatherScatterSDNode>(N)->getMask(); | |||
49585 | if (Mask.getScalarValueSizeInBits() != 1) { | |||
49586 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
49587 | APInt DemandedMask(APInt::getSignMask(Mask.getScalarValueSizeInBits())); | |||
49588 | if (TLI.SimplifyDemandedBits(Mask, DemandedMask, DCI)) { | |||
49589 | if (N->getOpcode() != ISD::DELETED_NODE) | |||
49590 | DCI.AddToWorklist(N); | |||
49591 | return SDValue(N, 0); | |||
49592 | } | |||
49593 | } | |||
49594 | ||||
49595 | return SDValue(); | |||
49596 | } | |||
49597 | ||||
49598 | static SDValue rebuildGatherScatter(MaskedGatherScatterSDNode *GorS, | |||
49599 | SDValue Index, SDValue Base, SDValue Scale, | |||
49600 | SelectionDAG &DAG) { | |||
49601 | SDLoc DL(GorS); | |||
49602 | ||||
49603 | if (auto *Gather = dyn_cast<MaskedGatherSDNode>(GorS)) { | |||
49604 | SDValue Ops[] = { Gather->getChain(), Gather->getPassThru(), | |||
49605 | Gather->getMask(), Base, Index, Scale } ; | |||
49606 | return DAG.getMaskedGather(Gather->getVTList(), | |||
49607 | Gather->getMemoryVT(), DL, Ops, | |||
49608 | Gather->getMemOperand(), | |||
49609 | Gather->getIndexType(), | |||
49610 | Gather->getExtensionType()); | |||
49611 | } | |||
49612 | auto *Scatter = cast<MaskedScatterSDNode>(GorS); | |||
49613 | SDValue Ops[] = { Scatter->getChain(), Scatter->getValue(), | |||
49614 | Scatter->getMask(), Base, Index, Scale }; | |||
49615 | return DAG.getMaskedScatter(Scatter->getVTList(), | |||
49616 | Scatter->getMemoryVT(), DL, | |||
49617 | Ops, Scatter->getMemOperand(), | |||
49618 | Scatter->getIndexType(), | |||
49619 | Scatter->isTruncatingStore()); | |||
49620 | } | |||
49621 | ||||
49622 | static SDValue combineGatherScatter(SDNode *N, SelectionDAG &DAG, | |||
49623 | TargetLowering::DAGCombinerInfo &DCI) { | |||
49624 | SDLoc DL(N); | |||
49625 | auto *GorS = cast<MaskedGatherScatterSDNode>(N); | |||
49626 | SDValue Index = GorS->getIndex(); | |||
49627 | SDValue Base = GorS->getBasePtr(); | |||
49628 | SDValue Scale = GorS->getScale(); | |||
49629 | ||||
49630 | if (DCI.isBeforeLegalize()) { | |||
49631 | unsigned IndexWidth = Index.getScalarValueSizeInBits(); | |||
49632 | ||||
49633 | // Shrink constant indices if they are larger than 32-bits. | |||
49634 | // Only do this before legalize types since v2i64 could become v2i32. | |||
49635 | // FIXME: We could check that the type is legal if we're after legalize | |||
49636 | // types, but then we would need to construct test cases where that happens. | |||
49637 | // FIXME: We could support more than just constant vectors, but we need to | |||
49638 | // careful with costing. A truncate that can be optimized out would be fine. | |||
49639 | // Otherwise we might only want to create a truncate if it avoids a split. | |||
49640 | if (auto *BV = dyn_cast<BuildVectorSDNode>(Index)) { | |||
49641 | if (BV->isConstant() && IndexWidth > 32 && | |||
49642 | DAG.ComputeNumSignBits(Index) > (IndexWidth - 32)) { | |||
49643 | EVT NewVT = Index.getValueType().changeVectorElementType(MVT::i32); | |||
49644 | Index = DAG.getNode(ISD::TRUNCATE, DL, NewVT, Index); | |||
49645 | return rebuildGatherScatter(GorS, Index, Base, Scale, DAG); | |||
49646 | } | |||
49647 | } | |||
49648 | ||||
49649 | // Shrink any sign/zero extends from 32 or smaller to larger than 32 if | |||
49650 | // there are sufficient sign bits. Only do this before legalize types to | |||
49651 | // avoid creating illegal types in truncate. | |||
49652 | if ((Index.getOpcode() == ISD::SIGN_EXTEND || | |||
49653 | Index.getOpcode() == ISD::ZERO_EXTEND) && | |||
49654 | IndexWidth > 32 && | |||
49655 | Index.getOperand(0).getScalarValueSizeInBits() <= 32 && | |||
49656 | DAG.ComputeNumSignBits(Index) > (IndexWidth - 32)) { | |||
49657 | EVT NewVT = Index.getValueType().changeVectorElementType(MVT::i32); | |||
49658 | Index = DAG.getNode(ISD::TRUNCATE, DL, NewVT, Index); | |||
49659 | return rebuildGatherScatter(GorS, Index, Base, Scale, DAG); | |||
49660 | } | |||
49661 | } | |||
49662 | ||||
49663 | if (DCI.isBeforeLegalizeOps()) { | |||
49664 | unsigned IndexWidth = Index.getScalarValueSizeInBits(); | |||
49665 | ||||
49666 | // Make sure the index is either i32 or i64 | |||
49667 | if (IndexWidth != 32 && IndexWidth != 64) { | |||
49668 | MVT EltVT = IndexWidth > 32 ? MVT::i64 : MVT::i32; | |||
49669 | EVT IndexVT = Index.getValueType().changeVectorElementType(EltVT); | |||
49670 | Index = DAG.getSExtOrTrunc(Index, DL, IndexVT); | |||
49671 | return rebuildGatherScatter(GorS, Index, Base, Scale, DAG); | |||
49672 | } | |||
49673 | } | |||
49674 | ||||
49675 | // With vector masks we only demand the upper bit of the mask. | |||
49676 | SDValue Mask = GorS->getMask(); | |||
49677 | if (Mask.getScalarValueSizeInBits() != 1) { | |||
49678 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
49679 | APInt DemandedMask(APInt::getSignMask(Mask.getScalarValueSizeInBits())); | |||
49680 | if (TLI.SimplifyDemandedBits(Mask, DemandedMask, DCI)) { | |||
49681 | if (N->getOpcode() != ISD::DELETED_NODE) | |||
49682 | DCI.AddToWorklist(N); | |||
49683 | return SDValue(N, 0); | |||
49684 | } | |||
49685 | } | |||
49686 | ||||
49687 | return SDValue(); | |||
49688 | } | |||
49689 | ||||
49690 | // Optimize RES = X86ISD::SETCC CONDCODE, EFLAG_INPUT | |||
49691 | static SDValue combineX86SetCC(SDNode *N, SelectionDAG &DAG, | |||
49692 | const X86Subtarget &Subtarget) { | |||
49693 | SDLoc DL(N); | |||
49694 | X86::CondCode CC = X86::CondCode(N->getConstantOperandVal(0)); | |||
49695 | SDValue EFLAGS = N->getOperand(1); | |||
49696 | ||||
49697 | // Try to simplify the EFLAGS and condition code operands. | |||
49698 | if (SDValue Flags = combineSetCCEFLAGS(EFLAGS, CC, DAG, Subtarget)) | |||
49699 | return getSETCC(CC, Flags, DL, DAG); | |||
49700 | ||||
49701 | return SDValue(); | |||
49702 | } | |||
49703 | ||||
49704 | /// Optimize branch condition evaluation. | |||
49705 | static SDValue combineBrCond(SDNode *N, SelectionDAG &DAG, | |||
49706 | const X86Subtarget &Subtarget) { | |||
49707 | SDLoc DL(N); | |||
49708 | SDValue EFLAGS = N->getOperand(3); | |||
49709 | X86::CondCode CC = X86::CondCode(N->getConstantOperandVal(2)); | |||
49710 | ||||
49711 | // Try to simplify the EFLAGS and condition code operands. | |||
49712 | // Make sure to not keep references to operands, as combineSetCCEFLAGS can | |||
49713 | // RAUW them under us. | |||
49714 | if (SDValue Flags = combineSetCCEFLAGS(EFLAGS, CC, DAG, Subtarget)) { | |||
49715 | SDValue Cond = DAG.getTargetConstant(CC, DL, MVT::i8); | |||
49716 | return DAG.getNode(X86ISD::BRCOND, DL, N->getVTList(), N->getOperand(0), | |||
49717 | N->getOperand(1), Cond, Flags); | |||
49718 | } | |||
49719 | ||||
49720 | return SDValue(); | |||
49721 | } | |||
49722 | ||||
49723 | // TODO: Could we move this to DAGCombine? | |||
49724 | static SDValue combineVectorCompareAndMaskUnaryOp(SDNode *N, | |||
49725 | SelectionDAG &DAG) { | |||
49726 | // Take advantage of vector comparisons (etc.) producing 0 or -1 in each lane | |||
49727 | // to optimize away operation when it's from a constant. | |||
49728 | // | |||
49729 | // The general transformation is: | |||
49730 | // UNARYOP(AND(VECTOR_CMP(x,y), constant)) --> | |||
49731 | // AND(VECTOR_CMP(x,y), constant2) | |||
49732 | // constant2 = UNARYOP(constant) | |||
49733 | ||||
49734 | // Early exit if this isn't a vector operation, the operand of the | |||
49735 | // unary operation isn't a bitwise AND, or if the sizes of the operations | |||
49736 | // aren't the same. | |||
49737 | EVT VT = N->getValueType(0); | |||
49738 | bool IsStrict = N->isStrictFPOpcode(); | |||
49739 | unsigned NumEltBits = VT.getScalarSizeInBits(); | |||
49740 | SDValue Op0 = N->getOperand(IsStrict ? 1 : 0); | |||
49741 | if (!VT.isVector() || Op0.getOpcode() != ISD::AND || | |||
49742 | DAG.ComputeNumSignBits(Op0.getOperand(0)) != NumEltBits || | |||
49743 | VT.getSizeInBits() != Op0.getValueSizeInBits()) | |||
49744 | return SDValue(); | |||
49745 | ||||
49746 | // Now check that the other operand of the AND is a constant. We could | |||
49747 | // make the transformation for non-constant splats as well, but it's unclear | |||
49748 | // that would be a benefit as it would not eliminate any operations, just | |||
49749 | // perform one more step in scalar code before moving to the vector unit. | |||
49750 | if (auto *BV = dyn_cast<BuildVectorSDNode>(Op0.getOperand(1))) { | |||
49751 | // Bail out if the vector isn't a constant. | |||
49752 | if (!BV->isConstant()) | |||
49753 | return SDValue(); | |||
49754 | ||||
49755 | // Everything checks out. Build up the new and improved node. | |||
49756 | SDLoc DL(N); | |||
49757 | EVT IntVT = BV->getValueType(0); | |||
49758 | // Create a new constant of the appropriate type for the transformed | |||
49759 | // DAG. | |||
49760 | SDValue SourceConst; | |||
49761 | if (IsStrict) | |||
49762 | SourceConst = DAG.getNode(N->getOpcode(), DL, {VT, MVT::Other}, | |||
49763 | {N->getOperand(0), SDValue(BV, 0)}); | |||
49764 | else | |||
49765 | SourceConst = DAG.getNode(N->getOpcode(), DL, VT, SDValue(BV, 0)); | |||
49766 | // The AND node needs bitcasts to/from an integer vector type around it. | |||
49767 | SDValue MaskConst = DAG.getBitcast(IntVT, SourceConst); | |||
49768 | SDValue NewAnd = DAG.getNode(ISD::AND, DL, IntVT, Op0->getOperand(0), | |||
49769 | MaskConst); | |||
49770 | SDValue Res = DAG.getBitcast(VT, NewAnd); | |||
49771 | if (IsStrict) | |||
49772 | return DAG.getMergeValues({Res, SourceConst.getValue(1)}, DL); | |||
49773 | return Res; | |||
49774 | } | |||
49775 | ||||
49776 | return SDValue(); | |||
49777 | } | |||
49778 | ||||
49779 | /// If we are converting a value to floating-point, try to replace scalar | |||
49780 | /// truncate of an extracted vector element with a bitcast. This tries to keep | |||
49781 | /// the sequence on XMM registers rather than moving between vector and GPRs. | |||
49782 | static SDValue combineToFPTruncExtElt(SDNode *N, SelectionDAG &DAG) { | |||
49783 | // TODO: This is currently only used by combineSIntToFP, but it is generalized | |||
49784 | // to allow being called by any similar cast opcode. | |||
49785 | // TODO: Consider merging this into lowering: vectorizeExtractedCast(). | |||
49786 | SDValue Trunc = N->getOperand(0); | |||
49787 | if (!Trunc.hasOneUse() || Trunc.getOpcode() != ISD::TRUNCATE) | |||
49788 | return SDValue(); | |||
49789 | ||||
49790 | SDValue ExtElt = Trunc.getOperand(0); | |||
49791 | if (!ExtElt.hasOneUse() || ExtElt.getOpcode() != ISD::EXTRACT_VECTOR_ELT || | |||
49792 | !isNullConstant(ExtElt.getOperand(1))) | |||
49793 | return SDValue(); | |||
49794 | ||||
49795 | EVT TruncVT = Trunc.getValueType(); | |||
49796 | EVT SrcVT = ExtElt.getValueType(); | |||
49797 | unsigned DestWidth = TruncVT.getSizeInBits(); | |||
49798 | unsigned SrcWidth = SrcVT.getSizeInBits(); | |||
49799 | if (SrcWidth % DestWidth != 0) | |||
49800 | return SDValue(); | |||
49801 | ||||
49802 | // inttofp (trunc (extelt X, 0)) --> inttofp (extelt (bitcast X), 0) | |||
49803 | EVT SrcVecVT = ExtElt.getOperand(0).getValueType(); | |||
49804 | unsigned VecWidth = SrcVecVT.getSizeInBits(); | |||
49805 | unsigned NumElts = VecWidth / DestWidth; | |||
49806 | EVT BitcastVT = EVT::getVectorVT(*DAG.getContext(), TruncVT, NumElts); | |||
49807 | SDValue BitcastVec = DAG.getBitcast(BitcastVT, ExtElt.getOperand(0)); | |||
49808 | SDLoc DL(N); | |||
49809 | SDValue NewExtElt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, TruncVT, | |||
49810 | BitcastVec, ExtElt.getOperand(1)); | |||
49811 | return DAG.getNode(N->getOpcode(), DL, N->getValueType(0), NewExtElt); | |||
49812 | } | |||
49813 | ||||
49814 | static SDValue combineUIntToFP(SDNode *N, SelectionDAG &DAG, | |||
49815 | const X86Subtarget &Subtarget) { | |||
49816 | bool IsStrict = N->isStrictFPOpcode(); | |||
49817 | SDValue Op0 = N->getOperand(IsStrict ? 1 : 0); | |||
49818 | EVT VT = N->getValueType(0); | |||
49819 | EVT InVT = Op0.getValueType(); | |||
49820 | ||||
49821 | // UINT_TO_FP(vXi1~15) -> UINT_TO_FP(ZEXT(vXi1~15 to vXi16)) | |||
49822 | // UINT_TO_FP(vXi17~31) -> UINT_TO_FP(ZEXT(vXi17~31 to vXi32)) | |||
49823 | // UINT_TO_FP(vXi33~63) -> UINT_TO_FP(ZEXT(vXi33~63 to vXi64)) | |||
49824 | if (InVT.isVector() && VT.getVectorElementType() == MVT::f16) { | |||
49825 | unsigned ScalarSize = InVT.getScalarSizeInBits(); | |||
49826 | if (ScalarSize == 16 || ScalarSize == 32 || ScalarSize >= 64) | |||
49827 | return SDValue(); | |||
49828 | SDLoc dl(N); | |||
49829 | EVT DstVT = EVT::getVectorVT(*DAG.getContext(), | |||
49830 | ScalarSize < 16 ? MVT::i16 | |||
49831 | : ScalarSize < 32 ? MVT::i32 | |||
49832 | : MVT::i64, | |||
49833 | InVT.getVectorNumElements()); | |||
49834 | SDValue P = DAG.getNode(ISD::ZERO_EXTEND, dl, DstVT, Op0); | |||
49835 | if (IsStrict) | |||
49836 | return DAG.getNode(ISD::STRICT_UINT_TO_FP, dl, {VT, MVT::Other}, | |||
49837 | {N->getOperand(0), P}); | |||
49838 | return DAG.getNode(ISD::UINT_TO_FP, dl, VT, P); | |||
49839 | } | |||
49840 | ||||
49841 | // UINT_TO_FP(vXi1) -> SINT_TO_FP(ZEXT(vXi1 to vXi32)) | |||
49842 | // UINT_TO_FP(vXi8) -> SINT_TO_FP(ZEXT(vXi8 to vXi32)) | |||
49843 | // UINT_TO_FP(vXi16) -> SINT_TO_FP(ZEXT(vXi16 to vXi32)) | |||
49844 | if (InVT.isVector() && InVT.getScalarSizeInBits() < 32 && | |||
49845 | VT.getScalarType() != MVT::f16) { | |||
49846 | SDLoc dl(N); | |||
49847 | EVT DstVT = InVT.changeVectorElementType(MVT::i32); | |||
49848 | SDValue P = DAG.getNode(ISD::ZERO_EXTEND, dl, DstVT, Op0); | |||
49849 | ||||
49850 | // UINT_TO_FP isn't legal without AVX512 so use SINT_TO_FP. | |||
49851 | if (IsStrict) | |||
49852 | return DAG.getNode(ISD::STRICT_SINT_TO_FP, dl, {VT, MVT::Other}, | |||
49853 | {N->getOperand(0), P}); | |||
49854 | return DAG.getNode(ISD::SINT_TO_FP, dl, VT, P); | |||
49855 | } | |||
49856 | ||||
49857 | // Since UINT_TO_FP is legal (it's marked custom), dag combiner won't | |||
49858 | // optimize it to a SINT_TO_FP when the sign bit is known zero. Perform | |||
49859 | // the optimization here. | |||
49860 | if (DAG.SignBitIsZero(Op0)) { | |||
49861 | if (IsStrict) | |||
49862 | return DAG.getNode(ISD::STRICT_SINT_TO_FP, SDLoc(N), {VT, MVT::Other}, | |||
49863 | {N->getOperand(0), Op0}); | |||
49864 | return DAG.getNode(ISD::SINT_TO_FP, SDLoc(N), VT, Op0); | |||
49865 | } | |||
49866 | ||||
49867 | return SDValue(); | |||
49868 | } | |||
49869 | ||||
49870 | static SDValue combineSIntToFP(SDNode *N, SelectionDAG &DAG, | |||
49871 | TargetLowering::DAGCombinerInfo &DCI, | |||
49872 | const X86Subtarget &Subtarget) { | |||
49873 | // First try to optimize away the conversion entirely when it's | |||
49874 | // conditionally from a constant. Vectors only. | |||
49875 | bool IsStrict = N->isStrictFPOpcode(); | |||
49876 | if (SDValue Res = combineVectorCompareAndMaskUnaryOp(N, DAG)) | |||
49877 | return Res; | |||
49878 | ||||
49879 | // Now move on to more general possibilities. | |||
49880 | SDValue Op0 = N->getOperand(IsStrict ? 1 : 0); | |||
49881 | EVT VT = N->getValueType(0); | |||
49882 | EVT InVT = Op0.getValueType(); | |||
49883 | ||||
49884 | // SINT_TO_FP(vXi1~15) -> SINT_TO_FP(SEXT(vXi1~15 to vXi16)) | |||
49885 | // SINT_TO_FP(vXi17~31) -> SINT_TO_FP(SEXT(vXi17~31 to vXi32)) | |||
49886 | // SINT_TO_FP(vXi33~63) -> SINT_TO_FP(SEXT(vXi33~63 to vXi64)) | |||
49887 | if (InVT.isVector() && VT.getVectorElementType() == MVT::f16) { | |||
49888 | unsigned ScalarSize = InVT.getScalarSizeInBits(); | |||
49889 | if (ScalarSize == 16 || ScalarSize == 32 || ScalarSize >= 64) | |||
49890 | return SDValue(); | |||
49891 | SDLoc dl(N); | |||
49892 | EVT DstVT = EVT::getVectorVT(*DAG.getContext(), | |||
49893 | ScalarSize < 16 ? MVT::i16 | |||
49894 | : ScalarSize < 32 ? MVT::i32 | |||
49895 | : MVT::i64, | |||
49896 | InVT.getVectorNumElements()); | |||
49897 | SDValue P = DAG.getNode(ISD::SIGN_EXTEND, dl, DstVT, Op0); | |||
49898 | if (IsStrict) | |||
49899 | return DAG.getNode(ISD::STRICT_SINT_TO_FP, dl, {VT, MVT::Other}, | |||
49900 | {N->getOperand(0), P}); | |||
49901 | return DAG.getNode(ISD::SINT_TO_FP, dl, VT, P); | |||
49902 | } | |||
49903 | ||||
49904 | // SINT_TO_FP(vXi1) -> SINT_TO_FP(SEXT(vXi1 to vXi32)) | |||
49905 | // SINT_TO_FP(vXi8) -> SINT_TO_FP(SEXT(vXi8 to vXi32)) | |||
49906 | // SINT_TO_FP(vXi16) -> SINT_TO_FP(SEXT(vXi16 to vXi32)) | |||
49907 | if (InVT.isVector() && InVT.getScalarSizeInBits() < 32 && | |||
49908 | VT.getScalarType() != MVT::f16) { | |||
49909 | SDLoc dl(N); | |||
49910 | EVT DstVT = InVT.changeVectorElementType(MVT::i32); | |||
49911 | SDValue P = DAG.getNode(ISD::SIGN_EXTEND, dl, DstVT, Op0); | |||
49912 | if (IsStrict) | |||
49913 | return DAG.getNode(ISD::STRICT_SINT_TO_FP, dl, {VT, MVT::Other}, | |||
49914 | {N->getOperand(0), P}); | |||
49915 | return DAG.getNode(ISD::SINT_TO_FP, dl, VT, P); | |||
49916 | } | |||
49917 | ||||
49918 | // Without AVX512DQ we only support i64 to float scalar conversion. For both | |||
49919 | // vectors and scalars, see if we know that the upper bits are all the sign | |||
49920 | // bit, in which case we can truncate the input to i32 and convert from that. | |||
49921 | if (InVT.getScalarSizeInBits() > 32 && !Subtarget.hasDQI()) { | |||
49922 | unsigned BitWidth = InVT.getScalarSizeInBits(); | |||
49923 | unsigned NumSignBits = DAG.ComputeNumSignBits(Op0); | |||
49924 | if (NumSignBits >= (BitWidth - 31)) { | |||
49925 | EVT TruncVT = MVT::i32; | |||
49926 | if (InVT.isVector()) | |||
49927 | TruncVT = InVT.changeVectorElementType(TruncVT); | |||
49928 | SDLoc dl(N); | |||
49929 | if (DCI.isBeforeLegalize() || TruncVT != MVT::v2i32) { | |||
49930 | SDValue Trunc = DAG.getNode(ISD::TRUNCATE, dl, TruncVT, Op0); | |||
49931 | if (IsStrict) | |||
49932 | return DAG.getNode(ISD::STRICT_SINT_TO_FP, dl, {VT, MVT::Other}, | |||
49933 | {N->getOperand(0), Trunc}); | |||
49934 | return DAG.getNode(ISD::SINT_TO_FP, dl, VT, Trunc); | |||
49935 | } | |||
49936 | // If we're after legalize and the type is v2i32 we need to shuffle and | |||
49937 | // use CVTSI2P. | |||
49938 | assert(InVT == MVT::v2i64 && "Unexpected VT!")(static_cast <bool> (InVT == MVT::v2i64 && "Unexpected VT!" ) ? void (0) : __assert_fail ("InVT == MVT::v2i64 && \"Unexpected VT!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 49938, __extension__ __PRETTY_FUNCTION__)); | |||
49939 | SDValue Cast = DAG.getBitcast(MVT::v4i32, Op0); | |||
49940 | SDValue Shuf = DAG.getVectorShuffle(MVT::v4i32, dl, Cast, Cast, | |||
49941 | { 0, 2, -1, -1 }); | |||
49942 | if (IsStrict) | |||
49943 | return DAG.getNode(X86ISD::STRICT_CVTSI2P, dl, {VT, MVT::Other}, | |||
49944 | {N->getOperand(0), Shuf}); | |||
49945 | return DAG.getNode(X86ISD::CVTSI2P, dl, VT, Shuf); | |||
49946 | } | |||
49947 | } | |||
49948 | ||||
49949 | // Transform (SINT_TO_FP (i64 ...)) into an x87 operation if we have | |||
49950 | // a 32-bit target where SSE doesn't support i64->FP operations. | |||
49951 | if (!Subtarget.useSoftFloat() && Subtarget.hasX87() && | |||
49952 | Op0.getOpcode() == ISD::LOAD) { | |||
49953 | LoadSDNode *Ld = cast<LoadSDNode>(Op0.getNode()); | |||
49954 | ||||
49955 | // This transformation is not supported if the result type is f16 or f128. | |||
49956 | if (VT == MVT::f16 || VT == MVT::f128) | |||
49957 | return SDValue(); | |||
49958 | ||||
49959 | // If we have AVX512DQ we can use packed conversion instructions unless | |||
49960 | // the VT is f80. | |||
49961 | if (Subtarget.hasDQI() && VT != MVT::f80) | |||
49962 | return SDValue(); | |||
49963 | ||||
49964 | if (Ld->isSimple() && !VT.isVector() && ISD::isNormalLoad(Op0.getNode()) && | |||
49965 | Op0.hasOneUse() && !Subtarget.is64Bit() && InVT == MVT::i64) { | |||
49966 | std::pair<SDValue, SDValue> Tmp = | |||
49967 | Subtarget.getTargetLowering()->BuildFILD( | |||
49968 | VT, InVT, SDLoc(N), Ld->getChain(), Ld->getBasePtr(), | |||
49969 | Ld->getPointerInfo(), Ld->getOriginalAlign(), DAG); | |||
49970 | DAG.ReplaceAllUsesOfValueWith(Op0.getValue(1), Tmp.second); | |||
49971 | return Tmp.first; | |||
49972 | } | |||
49973 | } | |||
49974 | ||||
49975 | if (IsStrict) | |||
49976 | return SDValue(); | |||
49977 | ||||
49978 | if (SDValue V = combineToFPTruncExtElt(N, DAG)) | |||
49979 | return V; | |||
49980 | ||||
49981 | return SDValue(); | |||
49982 | } | |||
49983 | ||||
49984 | static bool needCarryOrOverflowFlag(SDValue Flags) { | |||
49985 | assert(Flags.getValueType() == MVT::i32 && "Unexpected VT!")(static_cast <bool> (Flags.getValueType() == MVT::i32 && "Unexpected VT!") ? void (0) : __assert_fail ("Flags.getValueType() == MVT::i32 && \"Unexpected VT!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 49985, __extension__ __PRETTY_FUNCTION__)); | |||
49986 | ||||
49987 | for (SDNode::use_iterator UI = Flags->use_begin(), UE = Flags->use_end(); | |||
49988 | UI != UE; ++UI) { | |||
49989 | SDNode *User = *UI; | |||
49990 | ||||
49991 | X86::CondCode CC; | |||
49992 | switch (User->getOpcode()) { | |||
49993 | default: | |||
49994 | // Be conservative. | |||
49995 | return true; | |||
49996 | case X86ISD::SETCC: | |||
49997 | case X86ISD::SETCC_CARRY: | |||
49998 | CC = (X86::CondCode)User->getConstantOperandVal(0); | |||
49999 | break; | |||
50000 | case X86ISD::BRCOND: | |||
50001 | CC = (X86::CondCode)User->getConstantOperandVal(2); | |||
50002 | break; | |||
50003 | case X86ISD::CMOV: | |||
50004 | CC = (X86::CondCode)User->getConstantOperandVal(2); | |||
50005 | break; | |||
50006 | } | |||
50007 | ||||
50008 | switch (CC) { | |||
50009 | default: break; | |||
50010 | case X86::COND_A: case X86::COND_AE: | |||
50011 | case X86::COND_B: case X86::COND_BE: | |||
50012 | case X86::COND_O: case X86::COND_NO: | |||
50013 | case X86::COND_G: case X86::COND_GE: | |||
50014 | case X86::COND_L: case X86::COND_LE: | |||
50015 | return true; | |||
50016 | } | |||
50017 | } | |||
50018 | ||||
50019 | return false; | |||
50020 | } | |||
50021 | ||||
50022 | static bool onlyZeroFlagUsed(SDValue Flags) { | |||
50023 | assert(Flags.getValueType() == MVT::i32 && "Unexpected VT!")(static_cast <bool> (Flags.getValueType() == MVT::i32 && "Unexpected VT!") ? void (0) : __assert_fail ("Flags.getValueType() == MVT::i32 && \"Unexpected VT!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 50023, __extension__ __PRETTY_FUNCTION__)); | |||
50024 | ||||
50025 | for (SDNode::use_iterator UI = Flags->use_begin(), UE = Flags->use_end(); | |||
50026 | UI != UE; ++UI) { | |||
50027 | SDNode *User = *UI; | |||
50028 | ||||
50029 | unsigned CCOpNo; | |||
50030 | switch (User->getOpcode()) { | |||
50031 | default: | |||
50032 | // Be conservative. | |||
50033 | return false; | |||
50034 | case X86ISD::SETCC: CCOpNo = 0; break; | |||
50035 | case X86ISD::SETCC_CARRY: CCOpNo = 0; break; | |||
50036 | case X86ISD::BRCOND: CCOpNo = 2; break; | |||
50037 | case X86ISD::CMOV: CCOpNo = 2; break; | |||
50038 | } | |||
50039 | ||||
50040 | X86::CondCode CC = (X86::CondCode)User->getConstantOperandVal(CCOpNo); | |||
50041 | if (CC != X86::COND_E && CC != X86::COND_NE) | |||
50042 | return false; | |||
50043 | } | |||
50044 | ||||
50045 | return true; | |||
50046 | } | |||
50047 | ||||
50048 | static SDValue combineCMP(SDNode *N, SelectionDAG &DAG) { | |||
50049 | // Only handle test patterns. | |||
50050 | if (!isNullConstant(N->getOperand(1))) | |||
50051 | return SDValue(); | |||
50052 | ||||
50053 | // If we have a CMP of a truncated binop, see if we can make a smaller binop | |||
50054 | // and use its flags directly. | |||
50055 | // TODO: Maybe we should try promoting compares that only use the zero flag | |||
50056 | // first if we can prove the upper bits with computeKnownBits? | |||
50057 | SDLoc dl(N); | |||
50058 | SDValue Op = N->getOperand(0); | |||
50059 | EVT VT = Op.getValueType(); | |||
50060 | ||||
50061 | // If we have a constant logical shift that's only used in a comparison | |||
50062 | // against zero turn it into an equivalent AND. This allows turning it into | |||
50063 | // a TEST instruction later. | |||
50064 | if ((Op.getOpcode() == ISD::SRL || Op.getOpcode() == ISD::SHL) && | |||
50065 | Op.hasOneUse() && isa<ConstantSDNode>(Op.getOperand(1)) && | |||
50066 | onlyZeroFlagUsed(SDValue(N, 0))) { | |||
50067 | unsigned BitWidth = VT.getSizeInBits(); | |||
50068 | const APInt &ShAmt = Op.getConstantOperandAPInt(1); | |||
50069 | if (ShAmt.ult(BitWidth)) { // Avoid undefined shifts. | |||
50070 | unsigned MaskBits = BitWidth - ShAmt.getZExtValue(); | |||
50071 | APInt Mask = Op.getOpcode() == ISD::SRL | |||
50072 | ? APInt::getHighBitsSet(BitWidth, MaskBits) | |||
50073 | : APInt::getLowBitsSet(BitWidth, MaskBits); | |||
50074 | if (Mask.isSignedIntN(32)) { | |||
50075 | Op = DAG.getNode(ISD::AND, dl, VT, Op.getOperand(0), | |||
50076 | DAG.getConstant(Mask, dl, VT)); | |||
50077 | return DAG.getNode(X86ISD::CMP, dl, MVT::i32, Op, | |||
50078 | DAG.getConstant(0, dl, VT)); | |||
50079 | } | |||
50080 | } | |||
50081 | } | |||
50082 | ||||
50083 | // Look for a truncate. | |||
50084 | if (Op.getOpcode() != ISD::TRUNCATE) | |||
50085 | return SDValue(); | |||
50086 | ||||
50087 | SDValue Trunc = Op; | |||
50088 | Op = Op.getOperand(0); | |||
50089 | ||||
50090 | // See if we can compare with zero against the truncation source, | |||
50091 | // which should help using the Z flag from many ops. Only do this for | |||
50092 | // i32 truncated op to prevent partial-reg compares of promoted ops. | |||
50093 | EVT OpVT = Op.getValueType(); | |||
50094 | APInt UpperBits = | |||
50095 | APInt::getBitsSetFrom(OpVT.getSizeInBits(), VT.getSizeInBits()); | |||
50096 | if (OpVT == MVT::i32 && DAG.MaskedValueIsZero(Op, UpperBits) && | |||
50097 | onlyZeroFlagUsed(SDValue(N, 0))) { | |||
50098 | return DAG.getNode(X86ISD::CMP, dl, MVT::i32, Op, | |||
50099 | DAG.getConstant(0, dl, OpVT)); | |||
50100 | } | |||
50101 | ||||
50102 | // After this the truncate and arithmetic op must have a single use. | |||
50103 | if (!Trunc.hasOneUse() || !Op.hasOneUse()) | |||
50104 | return SDValue(); | |||
50105 | ||||
50106 | unsigned NewOpc; | |||
50107 | switch (Op.getOpcode()) { | |||
50108 | default: return SDValue(); | |||
50109 | case ISD::AND: | |||
50110 | // Skip and with constant. We have special handling for and with immediate | |||
50111 | // during isel to generate test instructions. | |||
50112 | if (isa<ConstantSDNode>(Op.getOperand(1))) | |||
50113 | return SDValue(); | |||
50114 | NewOpc = X86ISD::AND; | |||
50115 | break; | |||
50116 | case ISD::OR: NewOpc = X86ISD::OR; break; | |||
50117 | case ISD::XOR: NewOpc = X86ISD::XOR; break; | |||
50118 | case ISD::ADD: | |||
50119 | // If the carry or overflow flag is used, we can't truncate. | |||
50120 | if (needCarryOrOverflowFlag(SDValue(N, 0))) | |||
50121 | return SDValue(); | |||
50122 | NewOpc = X86ISD::ADD; | |||
50123 | break; | |||
50124 | case ISD::SUB: | |||
50125 | // If the carry or overflow flag is used, we can't truncate. | |||
50126 | if (needCarryOrOverflowFlag(SDValue(N, 0))) | |||
50127 | return SDValue(); | |||
50128 | NewOpc = X86ISD::SUB; | |||
50129 | break; | |||
50130 | } | |||
50131 | ||||
50132 | // We found an op we can narrow. Truncate its inputs. | |||
50133 | SDValue Op0 = DAG.getNode(ISD::TRUNCATE, dl, VT, Op.getOperand(0)); | |||
50134 | SDValue Op1 = DAG.getNode(ISD::TRUNCATE, dl, VT, Op.getOperand(1)); | |||
50135 | ||||
50136 | // Use a X86 specific opcode to avoid DAG combine messing with it. | |||
50137 | SDVTList VTs = DAG.getVTList(VT, MVT::i32); | |||
50138 | Op = DAG.getNode(NewOpc, dl, VTs, Op0, Op1); | |||
50139 | ||||
50140 | // For AND, keep a CMP so that we can match the test pattern. | |||
50141 | if (NewOpc == X86ISD::AND) | |||
50142 | return DAG.getNode(X86ISD::CMP, dl, MVT::i32, Op, | |||
50143 | DAG.getConstant(0, dl, VT)); | |||
50144 | ||||
50145 | // Return the flags. | |||
50146 | return Op.getValue(1); | |||
50147 | } | |||
50148 | ||||
50149 | static SDValue combineX86AddSub(SDNode *N, SelectionDAG &DAG, | |||
50150 | TargetLowering::DAGCombinerInfo &DCI) { | |||
50151 | assert((X86ISD::ADD == N->getOpcode() || X86ISD::SUB == N->getOpcode()) &&(static_cast <bool> ((X86ISD::ADD == N->getOpcode() || X86ISD::SUB == N->getOpcode()) && "Expected X86ISD::ADD or X86ISD::SUB" ) ? void (0) : __assert_fail ("(X86ISD::ADD == N->getOpcode() || X86ISD::SUB == N->getOpcode()) && \"Expected X86ISD::ADD or X86ISD::SUB\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 50152, __extension__ __PRETTY_FUNCTION__)) | |||
50152 | "Expected X86ISD::ADD or X86ISD::SUB")(static_cast <bool> ((X86ISD::ADD == N->getOpcode() || X86ISD::SUB == N->getOpcode()) && "Expected X86ISD::ADD or X86ISD::SUB" ) ? void (0) : __assert_fail ("(X86ISD::ADD == N->getOpcode() || X86ISD::SUB == N->getOpcode()) && \"Expected X86ISD::ADD or X86ISD::SUB\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 50152, __extension__ __PRETTY_FUNCTION__)); | |||
50153 | ||||
50154 | SDLoc DL(N); | |||
50155 | SDValue LHS = N->getOperand(0); | |||
50156 | SDValue RHS = N->getOperand(1); | |||
50157 | MVT VT = LHS.getSimpleValueType(); | |||
50158 | unsigned GenericOpc = X86ISD::ADD == N->getOpcode() ? ISD::ADD : ISD::SUB; | |||
50159 | ||||
50160 | // If we don't use the flag result, simplify back to a generic ADD/SUB. | |||
50161 | if (!N->hasAnyUseOfValue(1)) { | |||
50162 | SDValue Res = DAG.getNode(GenericOpc, DL, VT, LHS, RHS); | |||
50163 | return DAG.getMergeValues({Res, DAG.getConstant(0, DL, MVT::i32)}, DL); | |||
50164 | } | |||
50165 | ||||
50166 | // Fold any similar generic ADD/SUB opcodes to reuse this node. | |||
50167 | auto MatchGeneric = [&](SDValue N0, SDValue N1, bool Negate) { | |||
50168 | SDValue Ops[] = {N0, N1}; | |||
50169 | SDVTList VTs = DAG.getVTList(N->getValueType(0)); | |||
50170 | if (SDNode *GenericAddSub = DAG.getNodeIfExists(GenericOpc, VTs, Ops)) { | |||
50171 | SDValue Op(N, 0); | |||
50172 | if (Negate) | |||
50173 | Op = DAG.getNode(ISD::SUB, DL, VT, DAG.getConstant(0, DL, VT), Op); | |||
50174 | DCI.CombineTo(GenericAddSub, Op); | |||
50175 | } | |||
50176 | }; | |||
50177 | MatchGeneric(LHS, RHS, false); | |||
50178 | MatchGeneric(RHS, LHS, X86ISD::SUB == N->getOpcode()); | |||
50179 | ||||
50180 | return SDValue(); | |||
50181 | } | |||
50182 | ||||
50183 | static SDValue combineSBB(SDNode *N, SelectionDAG &DAG) { | |||
50184 | if (SDValue Flags = combineCarryThroughADD(N->getOperand(2), DAG)) { | |||
50185 | MVT VT = N->getSimpleValueType(0); | |||
50186 | SDVTList VTs = DAG.getVTList(VT, MVT::i32); | |||
50187 | return DAG.getNode(X86ISD::SBB, SDLoc(N), VTs, | |||
50188 | N->getOperand(0), N->getOperand(1), | |||
50189 | Flags); | |||
50190 | } | |||
50191 | ||||
50192 | // Fold SBB(SUB(X,Y),0,Carry) -> SBB(X,Y,Carry) | |||
50193 | // iff the flag result is dead. | |||
50194 | SDValue Op0 = N->getOperand(0); | |||
50195 | SDValue Op1 = N->getOperand(1); | |||
50196 | if (Op0.getOpcode() == ISD::SUB && isNullConstant(Op1) && | |||
50197 | !N->hasAnyUseOfValue(1)) | |||
50198 | return DAG.getNode(X86ISD::SBB, SDLoc(N), N->getVTList(), Op0.getOperand(0), | |||
50199 | Op0.getOperand(1), N->getOperand(2)); | |||
50200 | ||||
50201 | return SDValue(); | |||
50202 | } | |||
50203 | ||||
50204 | // Optimize RES, EFLAGS = X86ISD::ADC LHS, RHS, EFLAGS | |||
50205 | static SDValue combineADC(SDNode *N, SelectionDAG &DAG, | |||
50206 | TargetLowering::DAGCombinerInfo &DCI) { | |||
50207 | // If the LHS and RHS of the ADC node are zero, then it can't overflow and | |||
50208 | // the result is either zero or one (depending on the input carry bit). | |||
50209 | // Strength reduce this down to a "set on carry" aka SETCC_CARRY&1. | |||
50210 | if (X86::isZeroNode(N->getOperand(0)) && | |||
50211 | X86::isZeroNode(N->getOperand(1)) && | |||
50212 | // We don't have a good way to replace an EFLAGS use, so only do this when | |||
50213 | // dead right now. | |||
50214 | SDValue(N, 1).use_empty()) { | |||
50215 | SDLoc DL(N); | |||
50216 | EVT VT = N->getValueType(0); | |||
50217 | SDValue CarryOut = DAG.getConstant(0, DL, N->getValueType(1)); | |||
50218 | SDValue Res1 = | |||
50219 | DAG.getNode(ISD::AND, DL, VT, | |||
50220 | DAG.getNode(X86ISD::SETCC_CARRY, DL, VT, | |||
50221 | DAG.getTargetConstant(X86::COND_B, DL, MVT::i8), | |||
50222 | N->getOperand(2)), | |||
50223 | DAG.getConstant(1, DL, VT)); | |||
50224 | return DCI.CombineTo(N, Res1, CarryOut); | |||
50225 | } | |||
50226 | ||||
50227 | if (SDValue Flags = combineCarryThroughADD(N->getOperand(2), DAG)) { | |||
50228 | MVT VT = N->getSimpleValueType(0); | |||
50229 | SDVTList VTs = DAG.getVTList(VT, MVT::i32); | |||
50230 | return DAG.getNode(X86ISD::ADC, SDLoc(N), VTs, | |||
50231 | N->getOperand(0), N->getOperand(1), | |||
50232 | Flags); | |||
50233 | } | |||
50234 | ||||
50235 | return SDValue(); | |||
50236 | } | |||
50237 | ||||
50238 | /// If this is an add or subtract where one operand is produced by a cmp+setcc, | |||
50239 | /// then try to convert it to an ADC or SBB. This replaces TEST+SET+{ADD/SUB} | |||
50240 | /// with CMP+{ADC, SBB}. | |||
50241 | static SDValue combineAddOrSubToADCOrSBB(SDNode *N, SelectionDAG &DAG) { | |||
50242 | bool IsSub = N->getOpcode() == ISD::SUB; | |||
50243 | SDValue X = N->getOperand(0); | |||
50244 | SDValue Y = N->getOperand(1); | |||
50245 | ||||
50246 | // If this is an add, canonicalize a zext operand to the RHS. | |||
50247 | // TODO: Incomplete? What if both sides are zexts? | |||
50248 | if (!IsSub && X.getOpcode() == ISD::ZERO_EXTEND && | |||
50249 | Y.getOpcode() != ISD::ZERO_EXTEND) | |||
50250 | std::swap(X, Y); | |||
50251 | ||||
50252 | // Look through a one-use zext. | |||
50253 | bool PeekedThroughZext = false; | |||
50254 | if (Y.getOpcode() == ISD::ZERO_EXTEND && Y.hasOneUse()) { | |||
50255 | Y = Y.getOperand(0); | |||
50256 | PeekedThroughZext = true; | |||
50257 | } | |||
50258 | ||||
50259 | // If this is an add, canonicalize a setcc operand to the RHS. | |||
50260 | // TODO: Incomplete? What if both sides are setcc? | |||
50261 | // TODO: Should we allow peeking through a zext of the other operand? | |||
50262 | if (!IsSub && !PeekedThroughZext && X.getOpcode() == X86ISD::SETCC && | |||
50263 | Y.getOpcode() != X86ISD::SETCC) | |||
50264 | std::swap(X, Y); | |||
50265 | ||||
50266 | if (Y.getOpcode() != X86ISD::SETCC || !Y.hasOneUse()) | |||
50267 | return SDValue(); | |||
50268 | ||||
50269 | SDLoc DL(N); | |||
50270 | EVT VT = N->getValueType(0); | |||
50271 | X86::CondCode CC = (X86::CondCode)Y.getConstantOperandVal(0); | |||
50272 | ||||
50273 | // If X is -1 or 0, then we have an opportunity to avoid constants required in | |||
50274 | // the general case below. | |||
50275 | auto *ConstantX = dyn_cast<ConstantSDNode>(X); | |||
50276 | if (ConstantX) { | |||
50277 | if ((!IsSub && CC == X86::COND_AE && ConstantX->isAllOnesValue()) || | |||
50278 | (IsSub && CC == X86::COND_B && ConstantX->isNullValue())) { | |||
50279 | // This is a complicated way to get -1 or 0 from the carry flag: | |||
50280 | // -1 + SETAE --> -1 + (!CF) --> CF ? -1 : 0 --> SBB %eax, %eax | |||
50281 | // 0 - SETB --> 0 - (CF) --> CF ? -1 : 0 --> SBB %eax, %eax | |||
50282 | return DAG.getNode(X86ISD::SETCC_CARRY, DL, VT, | |||
50283 | DAG.getTargetConstant(X86::COND_B, DL, MVT::i8), | |||
50284 | Y.getOperand(1)); | |||
50285 | } | |||
50286 | ||||
50287 | if ((!IsSub && CC == X86::COND_BE && ConstantX->isAllOnesValue()) || | |||
50288 | (IsSub && CC == X86::COND_A && ConstantX->isNullValue())) { | |||
50289 | SDValue EFLAGS = Y->getOperand(1); | |||
50290 | if (EFLAGS.getOpcode() == X86ISD::SUB && EFLAGS.hasOneUse() && | |||
50291 | EFLAGS.getValueType().isInteger() && | |||
50292 | !isa<ConstantSDNode>(EFLAGS.getOperand(1))) { | |||
50293 | // Swap the operands of a SUB, and we have the same pattern as above. | |||
50294 | // -1 + SETBE (SUB A, B) --> -1 + SETAE (SUB B, A) --> SUB + SBB | |||
50295 | // 0 - SETA (SUB A, B) --> 0 - SETB (SUB B, A) --> SUB + SBB | |||
50296 | SDValue NewSub = DAG.getNode( | |||
50297 | X86ISD::SUB, SDLoc(EFLAGS), EFLAGS.getNode()->getVTList(), | |||
50298 | EFLAGS.getOperand(1), EFLAGS.getOperand(0)); | |||
50299 | SDValue NewEFLAGS = SDValue(NewSub.getNode(), EFLAGS.getResNo()); | |||
50300 | return DAG.getNode(X86ISD::SETCC_CARRY, DL, VT, | |||
50301 | DAG.getTargetConstant(X86::COND_B, DL, MVT::i8), | |||
50302 | NewEFLAGS); | |||
50303 | } | |||
50304 | } | |||
50305 | } | |||
50306 | ||||
50307 | if (CC == X86::COND_B) { | |||
50308 | // X + SETB Z --> adc X, 0 | |||
50309 | // X - SETB Z --> sbb X, 0 | |||
50310 | return DAG.getNode(IsSub ? X86ISD::SBB : X86ISD::ADC, DL, | |||
50311 | DAG.getVTList(VT, MVT::i32), X, | |||
50312 | DAG.getConstant(0, DL, VT), Y.getOperand(1)); | |||
50313 | } | |||
50314 | ||||
50315 | if (CC == X86::COND_A) { | |||
50316 | SDValue EFLAGS = Y.getOperand(1); | |||
50317 | // Try to convert COND_A into COND_B in an attempt to facilitate | |||
50318 | // materializing "setb reg". | |||
50319 | // | |||
50320 | // Do not flip "e > c", where "c" is a constant, because Cmp instruction | |||
50321 | // cannot take an immediate as its first operand. | |||
50322 | // | |||
50323 | if (EFLAGS.getOpcode() == X86ISD::SUB && EFLAGS.getNode()->hasOneUse() && | |||
50324 | EFLAGS.getValueType().isInteger() && | |||
50325 | !isa<ConstantSDNode>(EFLAGS.getOperand(1))) { | |||
50326 | SDValue NewSub = DAG.getNode(X86ISD::SUB, SDLoc(EFLAGS), | |||
50327 | EFLAGS.getNode()->getVTList(), | |||
50328 | EFLAGS.getOperand(1), EFLAGS.getOperand(0)); | |||
50329 | SDValue NewEFLAGS = NewSub.getValue(EFLAGS.getResNo()); | |||
50330 | return DAG.getNode(IsSub ? X86ISD::SBB : X86ISD::ADC, DL, | |||
50331 | DAG.getVTList(VT, MVT::i32), X, | |||
50332 | DAG.getConstant(0, DL, VT), NewEFLAGS); | |||
50333 | } | |||
50334 | } | |||
50335 | ||||
50336 | if (CC == X86::COND_AE) { | |||
50337 | // X + SETAE --> sbb X, -1 | |||
50338 | // X - SETAE --> adc X, -1 | |||
50339 | return DAG.getNode(IsSub ? X86ISD::ADC : X86ISD::SBB, DL, | |||
50340 | DAG.getVTList(VT, MVT::i32), X, | |||
50341 | DAG.getConstant(-1, DL, VT), Y.getOperand(1)); | |||
50342 | } | |||
50343 | ||||
50344 | if (CC == X86::COND_BE) { | |||
50345 | // X + SETBE --> sbb X, -1 | |||
50346 | // X - SETBE --> adc X, -1 | |||
50347 | SDValue EFLAGS = Y.getOperand(1); | |||
50348 | // Try to convert COND_BE into COND_AE in an attempt to facilitate | |||
50349 | // materializing "setae reg". | |||
50350 | // | |||
50351 | // Do not flip "e <= c", where "c" is a constant, because Cmp instruction | |||
50352 | // cannot take an immediate as its first operand. | |||
50353 | // | |||
50354 | if (EFLAGS.getOpcode() == X86ISD::SUB && EFLAGS.getNode()->hasOneUse() && | |||
50355 | EFLAGS.getValueType().isInteger() && | |||
50356 | !isa<ConstantSDNode>(EFLAGS.getOperand(1))) { | |||
50357 | SDValue NewSub = DAG.getNode( | |||
50358 | X86ISD::SUB, SDLoc(EFLAGS), EFLAGS.getNode()->getVTList(), | |||
50359 | EFLAGS.getOperand(1), EFLAGS.getOperand(0)); | |||
50360 | SDValue NewEFLAGS = NewSub.getValue(EFLAGS.getResNo()); | |||
50361 | return DAG.getNode(IsSub ? X86ISD::ADC : X86ISD::SBB, DL, | |||
50362 | DAG.getVTList(VT, MVT::i32), X, | |||
50363 | DAG.getConstant(-1, DL, VT), NewEFLAGS); | |||
50364 | } | |||
50365 | } | |||
50366 | ||||
50367 | if (CC != X86::COND_E && CC != X86::COND_NE) | |||
50368 | return SDValue(); | |||
50369 | ||||
50370 | SDValue Cmp = Y.getOperand(1); | |||
50371 | if (Cmp.getOpcode() != X86ISD::CMP || !Cmp.hasOneUse() || | |||
50372 | !X86::isZeroNode(Cmp.getOperand(1)) || | |||
50373 | !Cmp.getOperand(0).getValueType().isInteger()) | |||
50374 | return SDValue(); | |||
50375 | ||||
50376 | SDValue Z = Cmp.getOperand(0); | |||
50377 | EVT ZVT = Z.getValueType(); | |||
50378 | ||||
50379 | // If X is -1 or 0, then we have an opportunity to avoid constants required in | |||
50380 | // the general case below. | |||
50381 | if (ConstantX) { | |||
50382 | // 'neg' sets the carry flag when Z != 0, so create 0 or -1 using 'sbb' with | |||
50383 | // fake operands: | |||
50384 | // 0 - (Z != 0) --> sbb %eax, %eax, (neg Z) | |||
50385 | // -1 + (Z == 0) --> sbb %eax, %eax, (neg Z) | |||
50386 | if ((IsSub && CC == X86::COND_NE && ConstantX->isNullValue()) || | |||
50387 | (!IsSub && CC == X86::COND_E && ConstantX->isAllOnesValue())) { | |||
50388 | SDValue Zero = DAG.getConstant(0, DL, ZVT); | |||
50389 | SDVTList X86SubVTs = DAG.getVTList(ZVT, MVT::i32); | |||
50390 | SDValue Neg = DAG.getNode(X86ISD::SUB, DL, X86SubVTs, Zero, Z); | |||
50391 | return DAG.getNode(X86ISD::SETCC_CARRY, DL, VT, | |||
50392 | DAG.getTargetConstant(X86::COND_B, DL, MVT::i8), | |||
50393 | SDValue(Neg.getNode(), 1)); | |||
50394 | } | |||
50395 | ||||
50396 | // cmp with 1 sets the carry flag when Z == 0, so create 0 or -1 using 'sbb' | |||
50397 | // with fake operands: | |||
50398 | // 0 - (Z == 0) --> sbb %eax, %eax, (cmp Z, 1) | |||
50399 | // -1 + (Z != 0) --> sbb %eax, %eax, (cmp Z, 1) | |||
50400 | if ((IsSub && CC == X86::COND_E && ConstantX->isNullValue()) || | |||
50401 | (!IsSub && CC == X86::COND_NE && ConstantX->isAllOnesValue())) { | |||
50402 | SDValue One = DAG.getConstant(1, DL, ZVT); | |||
50403 | SDVTList X86SubVTs = DAG.getVTList(ZVT, MVT::i32); | |||
50404 | SDValue Cmp1 = DAG.getNode(X86ISD::SUB, DL, X86SubVTs, Z, One); | |||
50405 | return DAG.getNode(X86ISD::SETCC_CARRY, DL, VT, | |||
50406 | DAG.getTargetConstant(X86::COND_B, DL, MVT::i8), | |||
50407 | Cmp1.getValue(1)); | |||
50408 | } | |||
50409 | } | |||
50410 | ||||
50411 | // (cmp Z, 1) sets the carry flag if Z is 0. | |||
50412 | SDValue One = DAG.getConstant(1, DL, ZVT); | |||
50413 | SDVTList X86SubVTs = DAG.getVTList(ZVT, MVT::i32); | |||
50414 | SDValue Cmp1 = DAG.getNode(X86ISD::SUB, DL, X86SubVTs, Z, One); | |||
50415 | ||||
50416 | // Add the flags type for ADC/SBB nodes. | |||
50417 | SDVTList VTs = DAG.getVTList(VT, MVT::i32); | |||
50418 | ||||
50419 | // X - (Z != 0) --> sub X, (zext(setne Z, 0)) --> adc X, -1, (cmp Z, 1) | |||
50420 | // X + (Z != 0) --> add X, (zext(setne Z, 0)) --> sbb X, -1, (cmp Z, 1) | |||
50421 | if (CC == X86::COND_NE) | |||
50422 | return DAG.getNode(IsSub ? X86ISD::ADC : X86ISD::SBB, DL, VTs, X, | |||
50423 | DAG.getConstant(-1ULL, DL, VT), Cmp1.getValue(1)); | |||
50424 | ||||
50425 | // X - (Z == 0) --> sub X, (zext(sete Z, 0)) --> sbb X, 0, (cmp Z, 1) | |||
50426 | // X + (Z == 0) --> add X, (zext(sete Z, 0)) --> adc X, 0, (cmp Z, 1) | |||
50427 | return DAG.getNode(IsSub ? X86ISD::SBB : X86ISD::ADC, DL, VTs, X, | |||
50428 | DAG.getConstant(0, DL, VT), Cmp1.getValue(1)); | |||
50429 | } | |||
50430 | ||||
50431 | static SDValue matchPMADDWD(SelectionDAG &DAG, SDValue Op0, SDValue Op1, | |||
50432 | const SDLoc &DL, EVT VT, | |||
50433 | const X86Subtarget &Subtarget) { | |||
50434 | // Example of pattern we try to detect: | |||
50435 | // t := (v8i32 mul (sext (v8i16 x0), (sext (v8i16 x1)))) | |||
50436 | //(add (build_vector (extract_elt t, 0), | |||
50437 | // (extract_elt t, 2), | |||
50438 | // (extract_elt t, 4), | |||
50439 | // (extract_elt t, 6)), | |||
50440 | // (build_vector (extract_elt t, 1), | |||
50441 | // (extract_elt t, 3), | |||
50442 | // (extract_elt t, 5), | |||
50443 | // (extract_elt t, 7))) | |||
50444 | ||||
50445 | if (!Subtarget.hasSSE2()) | |||
50446 | return SDValue(); | |||
50447 | ||||
50448 | if (Op0.getOpcode() != ISD::BUILD_VECTOR || | |||
50449 | Op1.getOpcode() != ISD::BUILD_VECTOR) | |||
50450 | return SDValue(); | |||
50451 | ||||
50452 | if (!VT.isVector() || VT.getVectorElementType() != MVT::i32 || | |||
50453 | VT.getVectorNumElements() < 4 || | |||
50454 | !isPowerOf2_32(VT.getVectorNumElements())) | |||
50455 | return SDValue(); | |||
50456 | ||||
50457 | // Check if one of Op0,Op1 is of the form: | |||
50458 | // (build_vector (extract_elt Mul, 0), | |||
50459 | // (extract_elt Mul, 2), | |||
50460 | // (extract_elt Mul, 4), | |||
50461 | // ... | |||
50462 | // the other is of the form: | |||
50463 | // (build_vector (extract_elt Mul, 1), | |||
50464 | // (extract_elt Mul, 3), | |||
50465 | // (extract_elt Mul, 5), | |||
50466 | // ... | |||
50467 | // and identify Mul. | |||
50468 | SDValue Mul; | |||
50469 | for (unsigned i = 0, e = VT.getVectorNumElements(); i != e; i += 2) { | |||
50470 | SDValue Op0L = Op0->getOperand(i), Op1L = Op1->getOperand(i), | |||
50471 | Op0H = Op0->getOperand(i + 1), Op1H = Op1->getOperand(i + 1); | |||
50472 | // TODO: Be more tolerant to undefs. | |||
50473 | if (Op0L.getOpcode() != ISD::EXTRACT_VECTOR_ELT || | |||
50474 | Op1L.getOpcode() != ISD::EXTRACT_VECTOR_ELT || | |||
50475 | Op0H.getOpcode() != ISD::EXTRACT_VECTOR_ELT || | |||
50476 | Op1H.getOpcode() != ISD::EXTRACT_VECTOR_ELT) | |||
50477 | return SDValue(); | |||
50478 | auto *Const0L = dyn_cast<ConstantSDNode>(Op0L->getOperand(1)); | |||
50479 | auto *Const1L = dyn_cast<ConstantSDNode>(Op1L->getOperand(1)); | |||
50480 | auto *Const0H = dyn_cast<ConstantSDNode>(Op0H->getOperand(1)); | |||
50481 | auto *Const1H = dyn_cast<ConstantSDNode>(Op1H->getOperand(1)); | |||
50482 | if (!Const0L || !Const1L || !Const0H || !Const1H) | |||
50483 | return SDValue(); | |||
50484 | unsigned Idx0L = Const0L->getZExtValue(), Idx1L = Const1L->getZExtValue(), | |||
50485 | Idx0H = Const0H->getZExtValue(), Idx1H = Const1H->getZExtValue(); | |||
50486 | // Commutativity of mul allows factors of a product to reorder. | |||
50487 | if (Idx0L > Idx1L) | |||
50488 | std::swap(Idx0L, Idx1L); | |||
50489 | if (Idx0H > Idx1H) | |||
50490 | std::swap(Idx0H, Idx1H); | |||
50491 | // Commutativity of add allows pairs of factors to reorder. | |||
50492 | if (Idx0L > Idx0H) { | |||
50493 | std::swap(Idx0L, Idx0H); | |||
50494 | std::swap(Idx1L, Idx1H); | |||
50495 | } | |||
50496 | if (Idx0L != 2 * i || Idx1L != 2 * i + 1 || Idx0H != 2 * i + 2 || | |||
50497 | Idx1H != 2 * i + 3) | |||
50498 | return SDValue(); | |||
50499 | if (!Mul) { | |||
50500 | // First time an extract_elt's source vector is visited. Must be a MUL | |||
50501 | // with 2X number of vector elements than the BUILD_VECTOR. | |||
50502 | // Both extracts must be from same MUL. | |||
50503 | Mul = Op0L->getOperand(0); | |||
50504 | if (Mul->getOpcode() != ISD::MUL || | |||
50505 | Mul.getValueType().getVectorNumElements() != 2 * e) | |||
50506 | return SDValue(); | |||
50507 | } | |||
50508 | // Check that the extract is from the same MUL previously seen. | |||
50509 | if (Mul != Op0L->getOperand(0) || Mul != Op1L->getOperand(0) || | |||
50510 | Mul != Op0H->getOperand(0) || Mul != Op1H->getOperand(0)) | |||
50511 | return SDValue(); | |||
50512 | } | |||
50513 | ||||
50514 | // Check if the Mul source can be safely shrunk. | |||
50515 | ShrinkMode Mode; | |||
50516 | if (!canReduceVMulWidth(Mul.getNode(), DAG, Mode) || | |||
50517 | Mode == ShrinkMode::MULU16) | |||
50518 | return SDValue(); | |||
50519 | ||||
50520 | EVT TruncVT = EVT::getVectorVT(*DAG.getContext(), MVT::i16, | |||
50521 | VT.getVectorNumElements() * 2); | |||
50522 | SDValue N0 = DAG.getNode(ISD::TRUNCATE, DL, TruncVT, Mul.getOperand(0)); | |||
50523 | SDValue N1 = DAG.getNode(ISD::TRUNCATE, DL, TruncVT, Mul.getOperand(1)); | |||
50524 | ||||
50525 | auto PMADDBuilder = [](SelectionDAG &DAG, const SDLoc &DL, | |||
50526 | ArrayRef<SDValue> Ops) { | |||
50527 | EVT InVT = Ops[0].getValueType(); | |||
50528 | assert(InVT == Ops[1].getValueType() && "Operands' types mismatch")(static_cast <bool> (InVT == Ops[1].getValueType() && "Operands' types mismatch") ? void (0) : __assert_fail ("InVT == Ops[1].getValueType() && \"Operands' types mismatch\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 50528, __extension__ __PRETTY_FUNCTION__)); | |||
50529 | EVT ResVT = EVT::getVectorVT(*DAG.getContext(), MVT::i32, | |||
50530 | InVT.getVectorNumElements() / 2); | |||
50531 | return DAG.getNode(X86ISD::VPMADDWD, DL, ResVT, Ops[0], Ops[1]); | |||
50532 | }; | |||
50533 | return SplitOpsAndApply(DAG, Subtarget, DL, VT, { N0, N1 }, PMADDBuilder); | |||
50534 | } | |||
50535 | ||||
50536 | // Attempt to turn this pattern into PMADDWD. | |||
50537 | // (add (mul (sext (build_vector)), (sext (build_vector))), | |||
50538 | // (mul (sext (build_vector)), (sext (build_vector))) | |||
50539 | static SDValue matchPMADDWD_2(SelectionDAG &DAG, SDValue N0, SDValue N1, | |||
50540 | const SDLoc &DL, EVT VT, | |||
50541 | const X86Subtarget &Subtarget) { | |||
50542 | if (!Subtarget.hasSSE2()) | |||
50543 | return SDValue(); | |||
50544 | ||||
50545 | if (N0.getOpcode() != ISD::MUL || N1.getOpcode() != ISD::MUL) | |||
50546 | return SDValue(); | |||
50547 | ||||
50548 | if (!VT.isVector() || VT.getVectorElementType() != MVT::i32 || | |||
50549 | VT.getVectorNumElements() < 4 || | |||
50550 | !isPowerOf2_32(VT.getVectorNumElements())) | |||
50551 | return SDValue(); | |||
50552 | ||||
50553 | SDValue N00 = N0.getOperand(0); | |||
50554 | SDValue N01 = N0.getOperand(1); | |||
50555 | SDValue N10 = N1.getOperand(0); | |||
50556 | SDValue N11 = N1.getOperand(1); | |||
50557 | ||||
50558 | // All inputs need to be sign extends. | |||
50559 | // TODO: Support ZERO_EXTEND from known positive? | |||
50560 | if (N00.getOpcode() != ISD::SIGN_EXTEND || | |||
50561 | N01.getOpcode() != ISD::SIGN_EXTEND || | |||
50562 | N10.getOpcode() != ISD::SIGN_EXTEND || | |||
50563 | N11.getOpcode() != ISD::SIGN_EXTEND) | |||
50564 | return SDValue(); | |||
50565 | ||||
50566 | // Peek through the extends. | |||
50567 | N00 = N00.getOperand(0); | |||
50568 | N01 = N01.getOperand(0); | |||
50569 | N10 = N10.getOperand(0); | |||
50570 | N11 = N11.getOperand(0); | |||
50571 | ||||
50572 | // Must be extending from vXi16. | |||
50573 | EVT InVT = N00.getValueType(); | |||
50574 | if (InVT.getVectorElementType() != MVT::i16 || N01.getValueType() != InVT || | |||
50575 | N10.getValueType() != InVT || N11.getValueType() != InVT) | |||
50576 | return SDValue(); | |||
50577 | ||||
50578 | // All inputs should be build_vectors. | |||
50579 | if (N00.getOpcode() != ISD::BUILD_VECTOR || | |||
50580 | N01.getOpcode() != ISD::BUILD_VECTOR || | |||
50581 | N10.getOpcode() != ISD::BUILD_VECTOR || | |||
50582 | N11.getOpcode() != ISD::BUILD_VECTOR) | |||
50583 | return SDValue(); | |||
50584 | ||||
50585 | // For each element, we need to ensure we have an odd element from one vector | |||
50586 | // multiplied by the odd element of another vector and the even element from | |||
50587 | // one of the same vectors being multiplied by the even element from the | |||
50588 | // other vector. So we need to make sure for each element i, this operator | |||
50589 | // is being performed: | |||
50590 | // A[2 * i] * B[2 * i] + A[2 * i + 1] * B[2 * i + 1] | |||
50591 | SDValue In0, In1; | |||
50592 | for (unsigned i = 0; i != N00.getNumOperands(); ++i) { | |||
50593 | SDValue N00Elt = N00.getOperand(i); | |||
50594 | SDValue N01Elt = N01.getOperand(i); | |||
50595 | SDValue N10Elt = N10.getOperand(i); | |||
50596 | SDValue N11Elt = N11.getOperand(i); | |||
50597 | // TODO: Be more tolerant to undefs. | |||
50598 | if (N00Elt.getOpcode() != ISD::EXTRACT_VECTOR_ELT || | |||
50599 | N01Elt.getOpcode() != ISD::EXTRACT_VECTOR_ELT || | |||
50600 | N10Elt.getOpcode() != ISD::EXTRACT_VECTOR_ELT || | |||
50601 | N11Elt.getOpcode() != ISD::EXTRACT_VECTOR_ELT) | |||
50602 | return SDValue(); | |||
50603 | auto *ConstN00Elt = dyn_cast<ConstantSDNode>(N00Elt.getOperand(1)); | |||
50604 | auto *ConstN01Elt = dyn_cast<ConstantSDNode>(N01Elt.getOperand(1)); | |||
50605 | auto *ConstN10Elt = dyn_cast<ConstantSDNode>(N10Elt.getOperand(1)); | |||
50606 | auto *ConstN11Elt = dyn_cast<ConstantSDNode>(N11Elt.getOperand(1)); | |||
50607 | if (!ConstN00Elt || !ConstN01Elt || !ConstN10Elt || !ConstN11Elt) | |||
50608 | return SDValue(); | |||
50609 | unsigned IdxN00 = ConstN00Elt->getZExtValue(); | |||
50610 | unsigned IdxN01 = ConstN01Elt->getZExtValue(); | |||
50611 | unsigned IdxN10 = ConstN10Elt->getZExtValue(); | |||
50612 | unsigned IdxN11 = ConstN11Elt->getZExtValue(); | |||
50613 | // Add is commutative so indices can be reordered. | |||
50614 | if (IdxN00 > IdxN10) { | |||
50615 | std::swap(IdxN00, IdxN10); | |||
50616 | std::swap(IdxN01, IdxN11); | |||
50617 | } | |||
50618 | // N0 indices be the even element. N1 indices must be the next odd element. | |||
50619 | if (IdxN00 != 2 * i || IdxN10 != 2 * i + 1 || | |||
50620 | IdxN01 != 2 * i || IdxN11 != 2 * i + 1) | |||
50621 | return SDValue(); | |||
50622 | SDValue N00In = N00Elt.getOperand(0); | |||
50623 | SDValue N01In = N01Elt.getOperand(0); | |||
50624 | SDValue N10In = N10Elt.getOperand(0); | |||
50625 | SDValue N11In = N11Elt.getOperand(0); | |||
50626 | ||||
50627 | // First time we find an input capture it. | |||
50628 | if (!In0) { | |||
50629 | In0 = N00In; | |||
50630 | In1 = N01In; | |||
50631 | ||||
50632 | // The input vectors must be at least as wide as the output. | |||
50633 | // If they are larger than the output, we extract subvector below. | |||
50634 | if (In0.getValueSizeInBits() < VT.getSizeInBits() || | |||
50635 | In1.getValueSizeInBits() < VT.getSizeInBits()) | |||
50636 | return SDValue(); | |||
50637 | } | |||
50638 | // Mul is commutative so the input vectors can be in any order. | |||
50639 | // Canonicalize to make the compares easier. | |||
50640 | if (In0 != N00In) | |||
50641 | std::swap(N00In, N01In); | |||
50642 | if (In0 != N10In) | |||
50643 | std::swap(N10In, N11In); | |||
50644 | if (In0 != N00In || In1 != N01In || In0 != N10In || In1 != N11In) | |||
50645 | return SDValue(); | |||
50646 | } | |||
50647 | ||||
50648 | auto PMADDBuilder = [](SelectionDAG &DAG, const SDLoc &DL, | |||
50649 | ArrayRef<SDValue> Ops) { | |||
50650 | EVT OpVT = Ops[0].getValueType(); | |||
50651 | assert(OpVT.getScalarType() == MVT::i16 &&(static_cast <bool> (OpVT.getScalarType() == MVT::i16 && "Unexpected scalar element type") ? void (0) : __assert_fail ("OpVT.getScalarType() == MVT::i16 && \"Unexpected scalar element type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 50652, __extension__ __PRETTY_FUNCTION__)) | |||
50652 | "Unexpected scalar element type")(static_cast <bool> (OpVT.getScalarType() == MVT::i16 && "Unexpected scalar element type") ? void (0) : __assert_fail ("OpVT.getScalarType() == MVT::i16 && \"Unexpected scalar element type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 50652, __extension__ __PRETTY_FUNCTION__)); | |||
50653 | assert(OpVT == Ops[1].getValueType() && "Operands' types mismatch")(static_cast <bool> (OpVT == Ops[1].getValueType() && "Operands' types mismatch") ? void (0) : __assert_fail ("OpVT == Ops[1].getValueType() && \"Operands' types mismatch\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 50653, __extension__ __PRETTY_FUNCTION__)); | |||
50654 | EVT ResVT = EVT::getVectorVT(*DAG.getContext(), MVT::i32, | |||
50655 | OpVT.getVectorNumElements() / 2); | |||
50656 | return DAG.getNode(X86ISD::VPMADDWD, DL, ResVT, Ops[0], Ops[1]); | |||
50657 | }; | |||
50658 | ||||
50659 | // If the output is narrower than an input, extract the low part of the input | |||
50660 | // vector. | |||
50661 | EVT OutVT16 = EVT::getVectorVT(*DAG.getContext(), MVT::i16, | |||
50662 | VT.getVectorNumElements() * 2); | |||
50663 | if (OutVT16.bitsLT(In0.getValueType())) { | |||
50664 | In0 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, OutVT16, In0, | |||
50665 | DAG.getIntPtrConstant(0, DL)); | |||
50666 | } | |||
50667 | if (OutVT16.bitsLT(In1.getValueType())) { | |||
50668 | In1 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, OutVT16, In1, | |||
50669 | DAG.getIntPtrConstant(0, DL)); | |||
50670 | } | |||
50671 | return SplitOpsAndApply(DAG, Subtarget, DL, VT, { In0, In1 }, | |||
50672 | PMADDBuilder); | |||
50673 | } | |||
50674 | ||||
50675 | /// CMOV of constants requires materializing constant operands in registers. | |||
50676 | /// Try to fold those constants into an 'add' instruction to reduce instruction | |||
50677 | /// count. We do this with CMOV rather the generic 'select' because there are | |||
50678 | /// earlier folds that may be used to turn select-of-constants into logic hacks. | |||
50679 | static SDValue pushAddIntoCmovOfConsts(SDNode *N, SelectionDAG &DAG) { | |||
50680 | // If an operand is zero, add-of-0 gets simplified away, so that's clearly | |||
50681 | // better because we eliminate 1-2 instructions. This transform is still | |||
50682 | // an improvement without zero operands because we trade 2 move constants and | |||
50683 | // 1 add for 2 adds (LEA) as long as the constants can be represented as | |||
50684 | // immediate asm operands (fit in 32-bits). | |||
50685 | auto isSuitableCmov = [](SDValue V) { | |||
50686 | if (V.getOpcode() != X86ISD::CMOV || !V.hasOneUse()) | |||
50687 | return false; | |||
50688 | if (!isa<ConstantSDNode>(V.getOperand(0)) || | |||
50689 | !isa<ConstantSDNode>(V.getOperand(1))) | |||
50690 | return false; | |||
50691 | return isNullConstant(V.getOperand(0)) || isNullConstant(V.getOperand(1)) || | |||
50692 | (V.getConstantOperandAPInt(0).isSignedIntN(32) && | |||
50693 | V.getConstantOperandAPInt(1).isSignedIntN(32)); | |||
50694 | }; | |||
50695 | ||||
50696 | // Match an appropriate CMOV as the first operand of the add. | |||
50697 | SDValue Cmov = N->getOperand(0); | |||
50698 | SDValue OtherOp = N->getOperand(1); | |||
50699 | if (!isSuitableCmov(Cmov)) | |||
50700 | std::swap(Cmov, OtherOp); | |||
50701 | if (!isSuitableCmov(Cmov)) | |||
50702 | return SDValue(); | |||
50703 | ||||
50704 | EVT VT = N->getValueType(0); | |||
50705 | SDLoc DL(N); | |||
50706 | SDValue FalseOp = Cmov.getOperand(0); | |||
50707 | SDValue TrueOp = Cmov.getOperand(1); | |||
50708 | ||||
50709 | // We will push the add through the select, but we can potentially do better | |||
50710 | // if we know there is another add in the sequence and this is pointer math. | |||
50711 | // In that case, we can absorb an add into the trailing memory op and avoid | |||
50712 | // a 3-operand LEA which is likely slower than a 2-operand LEA. | |||
50713 | // TODO: If target has "slow3OpsLEA", do this even without the trailing memop? | |||
50714 | if (OtherOp.getOpcode() == ISD::ADD && OtherOp.hasOneUse() && | |||
50715 | !isa<ConstantSDNode>(OtherOp.getOperand(0)) && | |||
50716 | all_of(N->uses(), [&](SDNode *Use) { | |||
50717 | auto *MemNode = dyn_cast<MemSDNode>(Use); | |||
50718 | return MemNode && MemNode->getBasePtr().getNode() == N; | |||
50719 | })) { | |||
50720 | // add (cmov C1, C2), add (X, Y) --> add (cmov (add X, C1), (add X, C2)), Y | |||
50721 | // TODO: We are arbitrarily choosing op0 as the 1st piece of the sum, but | |||
50722 | // it is possible that choosing op1 might be better. | |||
50723 | SDValue X = OtherOp.getOperand(0), Y = OtherOp.getOperand(1); | |||
50724 | FalseOp = DAG.getNode(ISD::ADD, DL, VT, X, FalseOp); | |||
50725 | TrueOp = DAG.getNode(ISD::ADD, DL, VT, X, TrueOp); | |||
50726 | Cmov = DAG.getNode(X86ISD::CMOV, DL, VT, FalseOp, TrueOp, | |||
50727 | Cmov.getOperand(2), Cmov.getOperand(3)); | |||
50728 | return DAG.getNode(ISD::ADD, DL, VT, Cmov, Y); | |||
50729 | } | |||
50730 | ||||
50731 | // add (cmov C1, C2), OtherOp --> cmov (add OtherOp, C1), (add OtherOp, C2) | |||
50732 | FalseOp = DAG.getNode(ISD::ADD, DL, VT, OtherOp, FalseOp); | |||
50733 | TrueOp = DAG.getNode(ISD::ADD, DL, VT, OtherOp, TrueOp); | |||
50734 | return DAG.getNode(X86ISD::CMOV, DL, VT, FalseOp, TrueOp, Cmov.getOperand(2), | |||
50735 | Cmov.getOperand(3)); | |||
50736 | } | |||
50737 | ||||
50738 | static SDValue combineAdd(SDNode *N, SelectionDAG &DAG, | |||
50739 | TargetLowering::DAGCombinerInfo &DCI, | |||
50740 | const X86Subtarget &Subtarget) { | |||
50741 | EVT VT = N->getValueType(0); | |||
50742 | SDValue Op0 = N->getOperand(0); | |||
50743 | SDValue Op1 = N->getOperand(1); | |||
50744 | ||||
50745 | if (SDValue Select = pushAddIntoCmovOfConsts(N, DAG)) | |||
50746 | return Select; | |||
50747 | ||||
50748 | if (SDValue MAdd = matchPMADDWD(DAG, Op0, Op1, SDLoc(N), VT, Subtarget)) | |||
50749 | return MAdd; | |||
50750 | if (SDValue MAdd = matchPMADDWD_2(DAG, Op0, Op1, SDLoc(N), VT, Subtarget)) | |||
50751 | return MAdd; | |||
50752 | ||||
50753 | // Try to synthesize horizontal adds from adds of shuffles. | |||
50754 | if (SDValue V = combineToHorizontalAddSub(N, DAG, Subtarget)) | |||
50755 | return V; | |||
50756 | ||||
50757 | // If vectors of i1 are legal, turn (add (zext (vXi1 X)), Y) into | |||
50758 | // (sub Y, (sext (vXi1 X))). | |||
50759 | // FIXME: We have the (sub Y, (zext (vXi1 X))) -> (add (sext (vXi1 X)), Y) in | |||
50760 | // generic DAG combine without a legal type check, but adding this there | |||
50761 | // caused regressions. | |||
50762 | if (VT.isVector()) { | |||
50763 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
50764 | if (Op0.getOpcode() == ISD::ZERO_EXTEND && | |||
50765 | Op0.getOperand(0).getValueType().getVectorElementType() == MVT::i1 && | |||
50766 | TLI.isTypeLegal(Op0.getOperand(0).getValueType())) { | |||
50767 | SDLoc DL(N); | |||
50768 | SDValue SExt = DAG.getNode(ISD::SIGN_EXTEND, DL, VT, Op0.getOperand(0)); | |||
50769 | return DAG.getNode(ISD::SUB, DL, VT, Op1, SExt); | |||
50770 | } | |||
50771 | ||||
50772 | if (Op1.getOpcode() == ISD::ZERO_EXTEND && | |||
50773 | Op1.getOperand(0).getValueType().getVectorElementType() == MVT::i1 && | |||
50774 | TLI.isTypeLegal(Op1.getOperand(0).getValueType())) { | |||
50775 | SDLoc DL(N); | |||
50776 | SDValue SExt = DAG.getNode(ISD::SIGN_EXTEND, DL, VT, Op1.getOperand(0)); | |||
50777 | return DAG.getNode(ISD::SUB, DL, VT, Op0, SExt); | |||
50778 | } | |||
50779 | } | |||
50780 | ||||
50781 | return combineAddOrSubToADCOrSBB(N, DAG); | |||
50782 | } | |||
50783 | ||||
50784 | static SDValue combineSub(SDNode *N, SelectionDAG &DAG, | |||
50785 | TargetLowering::DAGCombinerInfo &DCI, | |||
50786 | const X86Subtarget &Subtarget) { | |||
50787 | SDValue Op0 = N->getOperand(0); | |||
50788 | SDValue Op1 = N->getOperand(1); | |||
50789 | ||||
50790 | // TODO: Add NoOpaque handling to isConstantIntBuildVectorOrConstantInt. | |||
50791 | auto IsNonOpaqueConstant = [&](SDValue Op) { | |||
50792 | if (SDNode *C = DAG.isConstantIntBuildVectorOrConstantInt(Op)) { | |||
50793 | if (auto *Cst = dyn_cast<ConstantSDNode>(C)) | |||
50794 | return !Cst->isOpaque(); | |||
50795 | return true; | |||
50796 | } | |||
50797 | return false; | |||
50798 | }; | |||
50799 | ||||
50800 | // X86 can't encode an immediate LHS of a sub. See if we can push the | |||
50801 | // negation into a preceding instruction. If the RHS of the sub is a XOR with | |||
50802 | // one use and a constant, invert the immediate, saving one register. | |||
50803 | // sub(C1, xor(X, C2)) -> add(xor(X, ~C2), C1+1) | |||
50804 | if (Op1.getOpcode() == ISD::XOR && IsNonOpaqueConstant(Op0) && | |||
50805 | IsNonOpaqueConstant(Op1.getOperand(1)) && Op1->hasOneUse()) { | |||
50806 | SDLoc DL(N); | |||
50807 | EVT VT = Op0.getValueType(); | |||
50808 | SDValue NewXor = DAG.getNode(ISD::XOR, SDLoc(Op1), VT, Op1.getOperand(0), | |||
50809 | DAG.getNOT(SDLoc(Op1), Op1.getOperand(1), VT)); | |||
50810 | SDValue NewAdd = | |||
50811 | DAG.getNode(ISD::ADD, DL, VT, Op0, DAG.getConstant(1, DL, VT)); | |||
50812 | return DAG.getNode(ISD::ADD, DL, VT, NewXor, NewAdd); | |||
50813 | } | |||
50814 | ||||
50815 | // Try to synthesize horizontal subs from subs of shuffles. | |||
50816 | if (SDValue V = combineToHorizontalAddSub(N, DAG, Subtarget)) | |||
50817 | return V; | |||
50818 | ||||
50819 | return combineAddOrSubToADCOrSBB(N, DAG); | |||
50820 | } | |||
50821 | ||||
50822 | static SDValue combineVectorCompare(SDNode *N, SelectionDAG &DAG, | |||
50823 | const X86Subtarget &Subtarget) { | |||
50824 | MVT VT = N->getSimpleValueType(0); | |||
50825 | SDLoc DL(N); | |||
50826 | ||||
50827 | if (N->getOperand(0) == N->getOperand(1)) { | |||
50828 | if (N->getOpcode() == X86ISD::PCMPEQ) | |||
50829 | return DAG.getConstant(-1, DL, VT); | |||
50830 | if (N->getOpcode() == X86ISD::PCMPGT) | |||
50831 | return DAG.getConstant(0, DL, VT); | |||
50832 | } | |||
50833 | ||||
50834 | return SDValue(); | |||
50835 | } | |||
50836 | ||||
50837 | /// Helper that combines an array of subvector ops as if they were the operands | |||
50838 | /// of a ISD::CONCAT_VECTORS node, but may have come from another source (e.g. | |||
50839 | /// ISD::INSERT_SUBVECTOR). The ops are assumed to be of the same type. | |||
50840 | static SDValue combineConcatVectorOps(const SDLoc &DL, MVT VT, | |||
50841 | ArrayRef<SDValue> Ops, SelectionDAG &DAG, | |||
50842 | TargetLowering::DAGCombinerInfo &DCI, | |||
50843 | const X86Subtarget &Subtarget) { | |||
50844 | assert(Subtarget.hasAVX() && "AVX assumed for concat_vectors")(static_cast <bool> (Subtarget.hasAVX() && "AVX assumed for concat_vectors" ) ? void (0) : __assert_fail ("Subtarget.hasAVX() && \"AVX assumed for concat_vectors\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 50844, __extension__ __PRETTY_FUNCTION__)); | |||
50845 | unsigned EltSizeInBits = VT.getScalarSizeInBits(); | |||
50846 | ||||
50847 | if (llvm::all_of(Ops, [](SDValue Op) { return Op.isUndef(); })) | |||
50848 | return DAG.getUNDEF(VT); | |||
50849 | ||||
50850 | if (llvm::all_of(Ops, [](SDValue Op) { | |||
50851 | return ISD::isBuildVectorAllZeros(Op.getNode()); | |||
50852 | })) | |||
50853 | return getZeroVector(VT, Subtarget, DAG, DL); | |||
50854 | ||||
50855 | SDValue Op0 = Ops[0]; | |||
50856 | bool IsSplat = llvm::all_of(Ops, [&Op0](SDValue Op) { return Op == Op0; }); | |||
50857 | ||||
50858 | // Repeated subvectors. | |||
50859 | if (IsSplat && | |||
50860 | (VT.is256BitVector() || (VT.is512BitVector() && Subtarget.hasAVX512()))) { | |||
50861 | // If this broadcast is inserted into both halves, use a larger broadcast. | |||
50862 | if (Op0.getOpcode() == X86ISD::VBROADCAST) | |||
50863 | return DAG.getNode(Op0.getOpcode(), DL, VT, Op0.getOperand(0)); | |||
50864 | ||||
50865 | // If this scalar/subvector broadcast_load is inserted into both halves, use | |||
50866 | // a larger broadcast_load. Update other uses to use an extracted subvector. | |||
50867 | if (Op0.getOpcode() == X86ISD::VBROADCAST_LOAD || | |||
50868 | Op0.getOpcode() == X86ISD::SUBV_BROADCAST_LOAD) { | |||
50869 | auto *MemIntr = cast<MemIntrinsicSDNode>(Op0); | |||
50870 | SDVTList Tys = DAG.getVTList(VT, MVT::Other); | |||
50871 | SDValue Ops[] = {MemIntr->getChain(), MemIntr->getBasePtr()}; | |||
50872 | SDValue BcastLd = DAG.getMemIntrinsicNode(Op0.getOpcode(), DL, Tys, Ops, | |||
50873 | MemIntr->getMemoryVT(), | |||
50874 | MemIntr->getMemOperand()); | |||
50875 | DAG.ReplaceAllUsesOfValueWith( | |||
50876 | Op0, extractSubVector(BcastLd, 0, DAG, DL, Op0.getValueSizeInBits())); | |||
50877 | DAG.ReplaceAllUsesOfValueWith(SDValue(MemIntr, 1), BcastLd.getValue(1)); | |||
50878 | return BcastLd; | |||
50879 | } | |||
50880 | ||||
50881 | // If this is a simple subvector load repeated across multiple lanes, then | |||
50882 | // broadcast the load. Update other uses to use an extracted subvector. | |||
50883 | if (auto *Ld = dyn_cast<LoadSDNode>(Op0)) { | |||
50884 | if (Ld->isSimple() && !Ld->isNonTemporal() && | |||
50885 | Ld->getExtensionType() == ISD::NON_EXTLOAD) { | |||
50886 | SDVTList Tys = DAG.getVTList(VT, MVT::Other); | |||
50887 | SDValue Ops[] = {Ld->getChain(), Ld->getBasePtr()}; | |||
50888 | SDValue BcastLd = | |||
50889 | DAG.getMemIntrinsicNode(X86ISD::SUBV_BROADCAST_LOAD, DL, Tys, Ops, | |||
50890 | Ld->getMemoryVT(), Ld->getMemOperand()); | |||
50891 | DAG.ReplaceAllUsesOfValueWith( | |||
50892 | Op0, | |||
50893 | extractSubVector(BcastLd, 0, DAG, DL, Op0.getValueSizeInBits())); | |||
50894 | DAG.ReplaceAllUsesOfValueWith(SDValue(Ld, 1), BcastLd.getValue(1)); | |||
50895 | return BcastLd; | |||
50896 | } | |||
50897 | } | |||
50898 | ||||
50899 | // concat_vectors(movddup(x),movddup(x)) -> broadcast(x) | |||
50900 | if (Op0.getOpcode() == X86ISD::MOVDDUP && VT == MVT::v4f64 && | |||
50901 | (Subtarget.hasAVX2() || MayFoldLoadIntoBroadcastFromMem( | |||
50902 | Op0.getOperand(0), VT.getScalarType()))) | |||
50903 | return DAG.getNode(X86ISD::VBROADCAST, DL, VT, | |||
50904 | DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, MVT::f64, | |||
50905 | Op0.getOperand(0), | |||
50906 | DAG.getIntPtrConstant(0, DL))); | |||
50907 | ||||
50908 | // concat_vectors(scalar_to_vector(x),scalar_to_vector(x)) -> broadcast(x) | |||
50909 | if (Op0.getOpcode() == ISD::SCALAR_TO_VECTOR && | |||
50910 | (Subtarget.hasAVX2() || | |||
50911 | (EltSizeInBits >= 32 && MayFoldLoad(Op0.getOperand(0)))) && | |||
50912 | Op0.getOperand(0).getValueType() == VT.getScalarType()) | |||
50913 | return DAG.getNode(X86ISD::VBROADCAST, DL, VT, Op0.getOperand(0)); | |||
50914 | ||||
50915 | // concat_vectors(extract_subvector(broadcast(x)), | |||
50916 | // extract_subvector(broadcast(x))) -> broadcast(x) | |||
50917 | if (Op0.getOpcode() == ISD::EXTRACT_SUBVECTOR && | |||
50918 | Op0.getOperand(0).getValueType() == VT) { | |||
50919 | if (Op0.getOperand(0).getOpcode() == X86ISD::VBROADCAST || | |||
50920 | Op0.getOperand(0).getOpcode() == X86ISD::VBROADCAST_LOAD) | |||
50921 | return Op0.getOperand(0); | |||
50922 | } | |||
50923 | } | |||
50924 | ||||
50925 | // concat(extract_subvector(v0,c0), extract_subvector(v1,c1)) -> vperm2x128. | |||
50926 | // Only concat of subvector high halves which vperm2x128 is best at. | |||
50927 | // TODO: This should go in combineX86ShufflesRecursively eventually. | |||
50928 | if (VT.is256BitVector() && Ops.size() == 2) { | |||
50929 | SDValue Src0 = peekThroughBitcasts(Ops[0]); | |||
50930 | SDValue Src1 = peekThroughBitcasts(Ops[1]); | |||
50931 | if (Src0.getOpcode() == ISD::EXTRACT_SUBVECTOR && | |||
50932 | Src1.getOpcode() == ISD::EXTRACT_SUBVECTOR) { | |||
50933 | EVT SrcVT0 = Src0.getOperand(0).getValueType(); | |||
50934 | EVT SrcVT1 = Src1.getOperand(0).getValueType(); | |||
50935 | unsigned NumSrcElts0 = SrcVT0.getVectorNumElements(); | |||
50936 | unsigned NumSrcElts1 = SrcVT1.getVectorNumElements(); | |||
50937 | if (SrcVT0.is256BitVector() && SrcVT1.is256BitVector() && | |||
50938 | Src0.getConstantOperandAPInt(1) == (NumSrcElts0 / 2) && | |||
50939 | Src1.getConstantOperandAPInt(1) == (NumSrcElts1 / 2)) { | |||
50940 | return DAG.getNode(X86ISD::VPERM2X128, DL, VT, | |||
50941 | DAG.getBitcast(VT, Src0.getOperand(0)), | |||
50942 | DAG.getBitcast(VT, Src1.getOperand(0)), | |||
50943 | DAG.getTargetConstant(0x31, DL, MVT::i8)); | |||
50944 | } | |||
50945 | } | |||
50946 | } | |||
50947 | ||||
50948 | // Repeated opcode. | |||
50949 | // TODO - combineX86ShufflesRecursively should handle shuffle concatenation | |||
50950 | // but it currently struggles with different vector widths. | |||
50951 | if (llvm::all_of(Ops, [Op0](SDValue Op) { | |||
50952 | return Op.getOpcode() == Op0.getOpcode(); | |||
50953 | })) { | |||
50954 | auto ConcatSubOperand = [&](MVT VT, ArrayRef<SDValue> SubOps, unsigned I) { | |||
50955 | SmallVector<SDValue> Subs; | |||
50956 | for (SDValue SubOp : SubOps) | |||
50957 | Subs.push_back(SubOp.getOperand(I)); | |||
50958 | return DAG.getNode(ISD::CONCAT_VECTORS, DL, VT, Subs); | |||
50959 | }; | |||
50960 | ||||
50961 | unsigned NumOps = Ops.size(); | |||
50962 | switch (Op0.getOpcode()) { | |||
50963 | case X86ISD::SHUFP: { | |||
50964 | // Add SHUFPD support if/when necessary. | |||
50965 | if (!IsSplat && VT.getScalarType() == MVT::f32 && | |||
50966 | llvm::all_of(Ops, [Op0](SDValue Op) { | |||
50967 | return Op.getOperand(2) == Op0.getOperand(2); | |||
50968 | })) { | |||
50969 | return DAG.getNode(Op0.getOpcode(), DL, VT, | |||
50970 | ConcatSubOperand(VT, Ops, 0), | |||
50971 | ConcatSubOperand(VT, Ops, 1), Op0.getOperand(2)); | |||
50972 | } | |||
50973 | break; | |||
50974 | } | |||
50975 | case X86ISD::PSHUFHW: | |||
50976 | case X86ISD::PSHUFLW: | |||
50977 | case X86ISD::PSHUFD: | |||
50978 | if (!IsSplat && NumOps == 2 && VT.is256BitVector() && | |||
50979 | Subtarget.hasInt256() && Op0.getOperand(1) == Ops[1].getOperand(1)) { | |||
50980 | return DAG.getNode(Op0.getOpcode(), DL, VT, | |||
50981 | ConcatSubOperand(VT, Ops, 0), Op0.getOperand(1)); | |||
50982 | } | |||
50983 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
50984 | case X86ISD::VPERMILPI: | |||
50985 | // TODO - add support for vXf64/vXi64 shuffles. | |||
50986 | if (!IsSplat && NumOps == 2 && (VT == MVT::v8f32 || VT == MVT::v8i32) && | |||
50987 | Subtarget.hasAVX() && Op0.getOperand(1) == Ops[1].getOperand(1)) { | |||
50988 | SDValue Res = DAG.getBitcast(MVT::v8f32, ConcatSubOperand(VT, Ops, 0)); | |||
50989 | Res = DAG.getNode(X86ISD::VPERMILPI, DL, MVT::v8f32, Res, | |||
50990 | Op0.getOperand(1)); | |||
50991 | return DAG.getBitcast(VT, Res); | |||
50992 | } | |||
50993 | break; | |||
50994 | case X86ISD::VPERMV3: | |||
50995 | if (!IsSplat && NumOps == 2 && VT.is512BitVector()) { | |||
50996 | MVT OpVT = Op0.getSimpleValueType(); | |||
50997 | int NumSrcElts = OpVT.getVectorNumElements(); | |||
50998 | SmallVector<int, 64> ConcatMask; | |||
50999 | for (unsigned i = 0; i != NumOps; ++i) { | |||
51000 | SmallVector<int, 64> SubMask; | |||
51001 | SmallVector<SDValue, 2> SubOps; | |||
51002 | if (!getTargetShuffleMask(Ops[i].getNode(), OpVT, false, SubOps, | |||
51003 | SubMask)) | |||
51004 | break; | |||
51005 | for (int M : SubMask) { | |||
51006 | if (0 <= M) { | |||
51007 | M += M < NumSrcElts ? 0 : NumSrcElts; | |||
51008 | M += i * NumSrcElts; | |||
51009 | } | |||
51010 | ConcatMask.push_back(M); | |||
51011 | } | |||
51012 | } | |||
51013 | if (ConcatMask.size() == (NumOps * NumSrcElts)) { | |||
51014 | SDValue Src0 = concatSubVectors(Ops[0].getOperand(0), | |||
51015 | Ops[1].getOperand(0), DAG, DL); | |||
51016 | SDValue Src1 = concatSubVectors(Ops[0].getOperand(2), | |||
51017 | Ops[1].getOperand(2), DAG, DL); | |||
51018 | MVT IntMaskSVT = MVT::getIntegerVT(VT.getScalarSizeInBits()); | |||
51019 | MVT IntMaskVT = MVT::getVectorVT(IntMaskSVT, NumOps * NumSrcElts); | |||
51020 | SDValue Mask = getConstVector(ConcatMask, IntMaskVT, DAG, DL, true); | |||
51021 | return DAG.getNode(X86ISD::VPERMV3, DL, VT, Src0, Mask, Src1); | |||
51022 | } | |||
51023 | } | |||
51024 | break; | |||
51025 | case X86ISD::VSHLI: | |||
51026 | case X86ISD::VSRLI: | |||
51027 | // Special case: SHL/SRL AVX1 V4i64 by 32-bits can lower as a shuffle. | |||
51028 | // TODO: Move this to LowerScalarImmediateShift? | |||
51029 | if (VT == MVT::v4i64 && !Subtarget.hasInt256() && | |||
51030 | llvm::all_of(Ops, [](SDValue Op) { | |||
51031 | return Op.getConstantOperandAPInt(1) == 32; | |||
51032 | })) { | |||
51033 | SDValue Res = DAG.getBitcast(MVT::v8i32, ConcatSubOperand(VT, Ops, 0)); | |||
51034 | SDValue Zero = getZeroVector(MVT::v8i32, Subtarget, DAG, DL); | |||
51035 | if (Op0.getOpcode() == X86ISD::VSHLI) { | |||
51036 | Res = DAG.getVectorShuffle(MVT::v8i32, DL, Res, Zero, | |||
51037 | {8, 0, 8, 2, 8, 4, 8, 6}); | |||
51038 | } else { | |||
51039 | Res = DAG.getVectorShuffle(MVT::v8i32, DL, Res, Zero, | |||
51040 | {1, 8, 3, 8, 5, 8, 7, 8}); | |||
51041 | } | |||
51042 | return DAG.getBitcast(VT, Res); | |||
51043 | } | |||
51044 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
51045 | case X86ISD::VSRAI: | |||
51046 | if (((VT.is256BitVector() && Subtarget.hasInt256()) || | |||
51047 | (VT.is512BitVector() && Subtarget.useAVX512Regs() && | |||
51048 | (EltSizeInBits >= 32 || Subtarget.useBWIRegs()))) && | |||
51049 | llvm::all_of(Ops, [Op0](SDValue Op) { | |||
51050 | return Op0.getOperand(1) == Op.getOperand(1); | |||
51051 | })) { | |||
51052 | return DAG.getNode(Op0.getOpcode(), DL, VT, | |||
51053 | ConcatSubOperand(VT, Ops, 0), Op0.getOperand(1)); | |||
51054 | } | |||
51055 | break; | |||
51056 | case X86ISD::VPERMI: | |||
51057 | case X86ISD::VROTLI: | |||
51058 | case X86ISD::VROTRI: | |||
51059 | if (VT.is512BitVector() && Subtarget.useAVX512Regs() && | |||
51060 | llvm::all_of(Ops, [Op0](SDValue Op) { | |||
51061 | return Op0.getOperand(1) == Op.getOperand(1); | |||
51062 | })) { | |||
51063 | return DAG.getNode(Op0.getOpcode(), DL, VT, | |||
51064 | ConcatSubOperand(VT, Ops, 0), Op0.getOperand(1)); | |||
51065 | } | |||
51066 | break; | |||
51067 | case ISD::AND: | |||
51068 | case ISD::OR: | |||
51069 | case ISD::XOR: | |||
51070 | case X86ISD::ANDNP: | |||
51071 | // TODO: Add 256-bit support. | |||
51072 | if (!IsSplat && VT.is512BitVector()) { | |||
51073 | MVT SrcVT = Op0.getOperand(0).getSimpleValueType(); | |||
51074 | SrcVT = MVT::getVectorVT(SrcVT.getScalarType(), | |||
51075 | NumOps * SrcVT.getVectorNumElements()); | |||
51076 | return DAG.getNode(Op0.getOpcode(), DL, VT, | |||
51077 | ConcatSubOperand(SrcVT, Ops, 0), | |||
51078 | ConcatSubOperand(SrcVT, Ops, 1)); | |||
51079 | } | |||
51080 | break; | |||
51081 | case X86ISD::HADD: | |||
51082 | case X86ISD::HSUB: | |||
51083 | case X86ISD::FHADD: | |||
51084 | case X86ISD::FHSUB: | |||
51085 | case X86ISD::PACKSS: | |||
51086 | case X86ISD::PACKUS: | |||
51087 | if (!IsSplat && VT.is256BitVector() && | |||
51088 | (VT.isFloatingPoint() || Subtarget.hasInt256())) { | |||
51089 | MVT SrcVT = Op0.getOperand(0).getSimpleValueType(); | |||
51090 | SrcVT = MVT::getVectorVT(SrcVT.getScalarType(), | |||
51091 | NumOps * SrcVT.getVectorNumElements()); | |||
51092 | return DAG.getNode(Op0.getOpcode(), DL, VT, | |||
51093 | ConcatSubOperand(SrcVT, Ops, 0), | |||
51094 | ConcatSubOperand(SrcVT, Ops, 1)); | |||
51095 | } | |||
51096 | break; | |||
51097 | case X86ISD::PALIGNR: | |||
51098 | if (!IsSplat && | |||
51099 | ((VT.is256BitVector() && Subtarget.hasInt256()) || | |||
51100 | (VT.is512BitVector() && Subtarget.useBWIRegs())) && | |||
51101 | llvm::all_of(Ops, [Op0](SDValue Op) { | |||
51102 | return Op0.getOperand(2) == Op.getOperand(2); | |||
51103 | })) { | |||
51104 | return DAG.getNode(Op0.getOpcode(), DL, VT, | |||
51105 | ConcatSubOperand(VT, Ops, 0), | |||
51106 | ConcatSubOperand(VT, Ops, 1), Op0.getOperand(2)); | |||
51107 | } | |||
51108 | break; | |||
51109 | } | |||
51110 | } | |||
51111 | ||||
51112 | // Fold subvector loads into one. | |||
51113 | // If needed, look through bitcasts to get to the load. | |||
51114 | if (auto *FirstLd = dyn_cast<LoadSDNode>(peekThroughBitcasts(Op0))) { | |||
51115 | bool Fast; | |||
51116 | const X86TargetLowering *TLI = Subtarget.getTargetLowering(); | |||
51117 | if (TLI->allowsMemoryAccess(*DAG.getContext(), DAG.getDataLayout(), VT, | |||
51118 | *FirstLd->getMemOperand(), &Fast) && | |||
51119 | Fast) { | |||
51120 | if (SDValue Ld = | |||
51121 | EltsFromConsecutiveLoads(VT, Ops, DL, DAG, Subtarget, false)) | |||
51122 | return Ld; | |||
51123 | } | |||
51124 | } | |||
51125 | ||||
51126 | return SDValue(); | |||
51127 | } | |||
51128 | ||||
51129 | static SDValue combineConcatVectors(SDNode *N, SelectionDAG &DAG, | |||
51130 | TargetLowering::DAGCombinerInfo &DCI, | |||
51131 | const X86Subtarget &Subtarget) { | |||
51132 | EVT VT = N->getValueType(0); | |||
51133 | EVT SrcVT = N->getOperand(0).getValueType(); | |||
51134 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
51135 | ||||
51136 | // Don't do anything for i1 vectors. | |||
51137 | if (VT.getVectorElementType() == MVT::i1) | |||
51138 | return SDValue(); | |||
51139 | ||||
51140 | if (Subtarget.hasAVX() && TLI.isTypeLegal(VT) && TLI.isTypeLegal(SrcVT)) { | |||
51141 | SmallVector<SDValue, 4> Ops(N->op_begin(), N->op_end()); | |||
51142 | if (SDValue R = combineConcatVectorOps(SDLoc(N), VT.getSimpleVT(), Ops, DAG, | |||
51143 | DCI, Subtarget)) | |||
51144 | return R; | |||
51145 | } | |||
51146 | ||||
51147 | return SDValue(); | |||
51148 | } | |||
51149 | ||||
51150 | static SDValue combineInsertSubvector(SDNode *N, SelectionDAG &DAG, | |||
51151 | TargetLowering::DAGCombinerInfo &DCI, | |||
51152 | const X86Subtarget &Subtarget) { | |||
51153 | if (DCI.isBeforeLegalizeOps()) | |||
51154 | return SDValue(); | |||
51155 | ||||
51156 | MVT OpVT = N->getSimpleValueType(0); | |||
51157 | ||||
51158 | bool IsI1Vector = OpVT.getVectorElementType() == MVT::i1; | |||
51159 | ||||
51160 | SDLoc dl(N); | |||
51161 | SDValue Vec = N->getOperand(0); | |||
51162 | SDValue SubVec = N->getOperand(1); | |||
51163 | ||||
51164 | uint64_t IdxVal = N->getConstantOperandVal(2); | |||
51165 | MVT SubVecVT = SubVec.getSimpleValueType(); | |||
51166 | ||||
51167 | if (Vec.isUndef() && SubVec.isUndef()) | |||
51168 | return DAG.getUNDEF(OpVT); | |||
51169 | ||||
51170 | // Inserting undefs/zeros into zeros/undefs is a zero vector. | |||
51171 | if ((Vec.isUndef() || ISD::isBuildVectorAllZeros(Vec.getNode())) && | |||
51172 | (SubVec.isUndef() || ISD::isBuildVectorAllZeros(SubVec.getNode()))) | |||
51173 | return getZeroVector(OpVT, Subtarget, DAG, dl); | |||
51174 | ||||
51175 | if (ISD::isBuildVectorAllZeros(Vec.getNode())) { | |||
51176 | // If we're inserting into a zero vector and then into a larger zero vector, | |||
51177 | // just insert into the larger zero vector directly. | |||
51178 | if (SubVec.getOpcode() == ISD::INSERT_SUBVECTOR && | |||
51179 | ISD::isBuildVectorAllZeros(SubVec.getOperand(0).getNode())) { | |||
51180 | uint64_t Idx2Val = SubVec.getConstantOperandVal(2); | |||
51181 | return DAG.getNode(ISD::INSERT_SUBVECTOR, dl, OpVT, | |||
51182 | getZeroVector(OpVT, Subtarget, DAG, dl), | |||
51183 | SubVec.getOperand(1), | |||
51184 | DAG.getIntPtrConstant(IdxVal + Idx2Val, dl)); | |||
51185 | } | |||
51186 | ||||
51187 | // If we're inserting into a zero vector and our input was extracted from an | |||
51188 | // insert into a zero vector of the same type and the extraction was at | |||
51189 | // least as large as the original insertion. Just insert the original | |||
51190 | // subvector into a zero vector. | |||
51191 | if (SubVec.getOpcode() == ISD::EXTRACT_SUBVECTOR && IdxVal == 0 && | |||
51192 | isNullConstant(SubVec.getOperand(1)) && | |||
51193 | SubVec.getOperand(0).getOpcode() == ISD::INSERT_SUBVECTOR) { | |||
51194 | SDValue Ins = SubVec.getOperand(0); | |||
51195 | if (isNullConstant(Ins.getOperand(2)) && | |||
51196 | ISD::isBuildVectorAllZeros(Ins.getOperand(0).getNode()) && | |||
51197 | Ins.getOperand(1).getValueSizeInBits().getFixedSize() <= | |||
51198 | SubVecVT.getFixedSizeInBits()) | |||
51199 | return DAG.getNode(ISD::INSERT_SUBVECTOR, dl, OpVT, | |||
51200 | getZeroVector(OpVT, Subtarget, DAG, dl), | |||
51201 | Ins.getOperand(1), N->getOperand(2)); | |||
51202 | } | |||
51203 | } | |||
51204 | ||||
51205 | // Stop here if this is an i1 vector. | |||
51206 | if (IsI1Vector) | |||
51207 | return SDValue(); | |||
51208 | ||||
51209 | // If this is an insert of an extract, combine to a shuffle. Don't do this | |||
51210 | // if the insert or extract can be represented with a subregister operation. | |||
51211 | if (SubVec.getOpcode() == ISD::EXTRACT_SUBVECTOR && | |||
51212 | SubVec.getOperand(0).getSimpleValueType() == OpVT && | |||
51213 | (IdxVal != 0 || | |||
51214 | !(Vec.isUndef() || ISD::isBuildVectorAllZeros(Vec.getNode())))) { | |||
51215 | int ExtIdxVal = SubVec.getConstantOperandVal(1); | |||
51216 | if (ExtIdxVal != 0) { | |||
51217 | int VecNumElts = OpVT.getVectorNumElements(); | |||
51218 | int SubVecNumElts = SubVecVT.getVectorNumElements(); | |||
51219 | SmallVector<int, 64> Mask(VecNumElts); | |||
51220 | // First create an identity shuffle mask. | |||
51221 | for (int i = 0; i != VecNumElts; ++i) | |||
51222 | Mask[i] = i; | |||
51223 | // Now insert the extracted portion. | |||
51224 | for (int i = 0; i != SubVecNumElts; ++i) | |||
51225 | Mask[i + IdxVal] = i + ExtIdxVal + VecNumElts; | |||
51226 | ||||
51227 | return DAG.getVectorShuffle(OpVT, dl, Vec, SubVec.getOperand(0), Mask); | |||
51228 | } | |||
51229 | } | |||
51230 | ||||
51231 | // Match concat_vector style patterns. | |||
51232 | SmallVector<SDValue, 2> SubVectorOps; | |||
51233 | if (collectConcatOps(N, SubVectorOps)) { | |||
51234 | if (SDValue Fold = | |||
51235 | combineConcatVectorOps(dl, OpVT, SubVectorOps, DAG, DCI, Subtarget)) | |||
51236 | return Fold; | |||
51237 | ||||
51238 | // If we're inserting all zeros into the upper half, change this to | |||
51239 | // a concat with zero. We will match this to a move | |||
51240 | // with implicit upper bit zeroing during isel. | |||
51241 | // We do this here because we don't want combineConcatVectorOps to | |||
51242 | // create INSERT_SUBVECTOR from CONCAT_VECTORS. | |||
51243 | if (SubVectorOps.size() == 2 && | |||
51244 | ISD::isBuildVectorAllZeros(SubVectorOps[1].getNode())) | |||
51245 | return DAG.getNode(ISD::INSERT_SUBVECTOR, dl, OpVT, | |||
51246 | getZeroVector(OpVT, Subtarget, DAG, dl), | |||
51247 | SubVectorOps[0], DAG.getIntPtrConstant(0, dl)); | |||
51248 | } | |||
51249 | ||||
51250 | // If this is a broadcast insert into an upper undef, use a larger broadcast. | |||
51251 | if (Vec.isUndef() && IdxVal != 0 && SubVec.getOpcode() == X86ISD::VBROADCAST) | |||
51252 | return DAG.getNode(X86ISD::VBROADCAST, dl, OpVT, SubVec.getOperand(0)); | |||
51253 | ||||
51254 | // If this is a broadcast load inserted into an upper undef, use a larger | |||
51255 | // broadcast load. | |||
51256 | if (Vec.isUndef() && IdxVal != 0 && SubVec.hasOneUse() && | |||
51257 | SubVec.getOpcode() == X86ISD::VBROADCAST_LOAD) { | |||
51258 | auto *MemIntr = cast<MemIntrinsicSDNode>(SubVec); | |||
51259 | SDVTList Tys = DAG.getVTList(OpVT, MVT::Other); | |||
51260 | SDValue Ops[] = { MemIntr->getChain(), MemIntr->getBasePtr() }; | |||
51261 | SDValue BcastLd = | |||
51262 | DAG.getMemIntrinsicNode(X86ISD::VBROADCAST_LOAD, dl, Tys, Ops, | |||
51263 | MemIntr->getMemoryVT(), | |||
51264 | MemIntr->getMemOperand()); | |||
51265 | DAG.ReplaceAllUsesOfValueWith(SDValue(MemIntr, 1), BcastLd.getValue(1)); | |||
51266 | return BcastLd; | |||
51267 | } | |||
51268 | ||||
51269 | // If we're splatting the lower half subvector of a full vector load into the | |||
51270 | // upper half, attempt to create a subvector broadcast. | |||
51271 | if (IdxVal == (OpVT.getVectorNumElements() / 2) && SubVec.hasOneUse() && | |||
51272 | Vec.getValueSizeInBits() == (2 * SubVec.getValueSizeInBits())) { | |||
51273 | auto *VecLd = dyn_cast<LoadSDNode>(Vec); | |||
51274 | auto *SubLd = dyn_cast<LoadSDNode>(SubVec); | |||
51275 | if (VecLd && SubLd && | |||
51276 | DAG.areNonVolatileConsecutiveLoads(SubLd, VecLd, | |||
51277 | SubVec.getValueSizeInBits() / 8, 0)) | |||
51278 | return getBROADCAST_LOAD(X86ISD::SUBV_BROADCAST_LOAD, dl, OpVT, SubVecVT, | |||
51279 | SubLd, 0, DAG); | |||
51280 | } | |||
51281 | ||||
51282 | return SDValue(); | |||
51283 | } | |||
51284 | ||||
51285 | /// If we are extracting a subvector of a vector select and the select condition | |||
51286 | /// is composed of concatenated vectors, try to narrow the select width. This | |||
51287 | /// is a common pattern for AVX1 integer code because 256-bit selects may be | |||
51288 | /// legal, but there is almost no integer math/logic available for 256-bit. | |||
51289 | /// This function should only be called with legal types (otherwise, the calls | |||
51290 | /// to get simple value types will assert). | |||
51291 | static SDValue narrowExtractedVectorSelect(SDNode *Ext, SelectionDAG &DAG) { | |||
51292 | SDValue Sel = peekThroughBitcasts(Ext->getOperand(0)); | |||
51293 | SmallVector<SDValue, 4> CatOps; | |||
51294 | if (Sel.getOpcode() != ISD::VSELECT || | |||
51295 | !collectConcatOps(Sel.getOperand(0).getNode(), CatOps)) | |||
51296 | return SDValue(); | |||
51297 | ||||
51298 | // Note: We assume simple value types because this should only be called with | |||
51299 | // legal operations/types. | |||
51300 | // TODO: This can be extended to handle extraction to 256-bits. | |||
51301 | MVT VT = Ext->getSimpleValueType(0); | |||
51302 | if (!VT.is128BitVector()) | |||
51303 | return SDValue(); | |||
51304 | ||||
51305 | MVT SelCondVT = Sel.getOperand(0).getSimpleValueType(); | |||
51306 | if (!SelCondVT.is256BitVector() && !SelCondVT.is512BitVector()) | |||
51307 | return SDValue(); | |||
51308 | ||||
51309 | MVT WideVT = Ext->getOperand(0).getSimpleValueType(); | |||
51310 | MVT SelVT = Sel.getSimpleValueType(); | |||
51311 | assert((SelVT.is256BitVector() || SelVT.is512BitVector()) &&(static_cast <bool> ((SelVT.is256BitVector() || SelVT.is512BitVector ()) && "Unexpected vector type with legal operations" ) ? void (0) : __assert_fail ("(SelVT.is256BitVector() || SelVT.is512BitVector()) && \"Unexpected vector type with legal operations\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 51312, __extension__ __PRETTY_FUNCTION__)) | |||
51312 | "Unexpected vector type with legal operations")(static_cast <bool> ((SelVT.is256BitVector() || SelVT.is512BitVector ()) && "Unexpected vector type with legal operations" ) ? void (0) : __assert_fail ("(SelVT.is256BitVector() || SelVT.is512BitVector()) && \"Unexpected vector type with legal operations\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 51312, __extension__ __PRETTY_FUNCTION__)); | |||
51313 | ||||
51314 | unsigned SelElts = SelVT.getVectorNumElements(); | |||
51315 | unsigned CastedElts = WideVT.getVectorNumElements(); | |||
51316 | unsigned ExtIdx = Ext->getConstantOperandVal(1); | |||
51317 | if (SelElts % CastedElts == 0) { | |||
51318 | // The select has the same or more (narrower) elements than the extract | |||
51319 | // operand. The extraction index gets scaled by that factor. | |||
51320 | ExtIdx *= (SelElts / CastedElts); | |||
51321 | } else if (CastedElts % SelElts == 0) { | |||
51322 | // The select has less (wider) elements than the extract operand. Make sure | |||
51323 | // that the extraction index can be divided evenly. | |||
51324 | unsigned IndexDivisor = CastedElts / SelElts; | |||
51325 | if (ExtIdx % IndexDivisor != 0) | |||
51326 | return SDValue(); | |||
51327 | ExtIdx /= IndexDivisor; | |||
51328 | } else { | |||
51329 | llvm_unreachable("Element count of simple vector types are not divisible?")::llvm::llvm_unreachable_internal("Element count of simple vector types are not divisible?" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 51329); | |||
51330 | } | |||
51331 | ||||
51332 | unsigned NarrowingFactor = WideVT.getSizeInBits() / VT.getSizeInBits(); | |||
51333 | unsigned NarrowElts = SelElts / NarrowingFactor; | |||
51334 | MVT NarrowSelVT = MVT::getVectorVT(SelVT.getVectorElementType(), NarrowElts); | |||
51335 | SDLoc DL(Ext); | |||
51336 | SDValue ExtCond = extract128BitVector(Sel.getOperand(0), ExtIdx, DAG, DL); | |||
51337 | SDValue ExtT = extract128BitVector(Sel.getOperand(1), ExtIdx, DAG, DL); | |||
51338 | SDValue ExtF = extract128BitVector(Sel.getOperand(2), ExtIdx, DAG, DL); | |||
51339 | SDValue NarrowSel = DAG.getSelect(DL, NarrowSelVT, ExtCond, ExtT, ExtF); | |||
51340 | return DAG.getBitcast(VT, NarrowSel); | |||
51341 | } | |||
51342 | ||||
51343 | static SDValue combineExtractSubvector(SDNode *N, SelectionDAG &DAG, | |||
51344 | TargetLowering::DAGCombinerInfo &DCI, | |||
51345 | const X86Subtarget &Subtarget) { | |||
51346 | // For AVX1 only, if we are extracting from a 256-bit and+not (which will | |||
51347 | // eventually get combined/lowered into ANDNP) with a concatenated operand, | |||
51348 | // split the 'and' into 128-bit ops to avoid the concatenate and extract. | |||
51349 | // We let generic combining take over from there to simplify the | |||
51350 | // insert/extract and 'not'. | |||
51351 | // This pattern emerges during AVX1 legalization. We handle it before lowering | |||
51352 | // to avoid complications like splitting constant vector loads. | |||
51353 | ||||
51354 | // Capture the original wide type in the likely case that we need to bitcast | |||
51355 | // back to this type. | |||
51356 | if (!N->getValueType(0).isSimple()) | |||
51357 | return SDValue(); | |||
51358 | ||||
51359 | MVT VT = N->getSimpleValueType(0); | |||
51360 | SDValue InVec = N->getOperand(0); | |||
51361 | unsigned IdxVal = N->getConstantOperandVal(1); | |||
51362 | SDValue InVecBC = peekThroughBitcasts(InVec); | |||
51363 | EVT InVecVT = InVec.getValueType(); | |||
51364 | unsigned SizeInBits = VT.getSizeInBits(); | |||
51365 | unsigned InSizeInBits = InVecVT.getSizeInBits(); | |||
51366 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
51367 | ||||
51368 | if (Subtarget.hasAVX() && !Subtarget.hasAVX2() && | |||
51369 | TLI.isTypeLegal(InVecVT) && | |||
51370 | InSizeInBits == 256 && InVecBC.getOpcode() == ISD::AND) { | |||
51371 | auto isConcatenatedNot = [](SDValue V) { | |||
51372 | V = peekThroughBitcasts(V); | |||
51373 | if (!isBitwiseNot(V)) | |||
51374 | return false; | |||
51375 | SDValue NotOp = V->getOperand(0); | |||
51376 | return peekThroughBitcasts(NotOp).getOpcode() == ISD::CONCAT_VECTORS; | |||
51377 | }; | |||
51378 | if (isConcatenatedNot(InVecBC.getOperand(0)) || | |||
51379 | isConcatenatedNot(InVecBC.getOperand(1))) { | |||
51380 | // extract (and v4i64 X, (not (concat Y1, Y2))), n -> andnp v2i64 X(n), Y1 | |||
51381 | SDValue Concat = splitVectorIntBinary(InVecBC, DAG); | |||
51382 | return DAG.getNode(ISD::EXTRACT_SUBVECTOR, SDLoc(N), VT, | |||
51383 | DAG.getBitcast(InVecVT, Concat), N->getOperand(1)); | |||
51384 | } | |||
51385 | } | |||
51386 | ||||
51387 | if (DCI.isBeforeLegalizeOps()) | |||
51388 | return SDValue(); | |||
51389 | ||||
51390 | if (SDValue V = narrowExtractedVectorSelect(N, DAG)) | |||
51391 | return V; | |||
51392 | ||||
51393 | if (ISD::isBuildVectorAllZeros(InVec.getNode())) | |||
51394 | return getZeroVector(VT, Subtarget, DAG, SDLoc(N)); | |||
51395 | ||||
51396 | if (ISD::isBuildVectorAllOnes(InVec.getNode())) { | |||
51397 | if (VT.getScalarType() == MVT::i1) | |||
51398 | return DAG.getConstant(1, SDLoc(N), VT); | |||
51399 | return getOnesVector(VT, DAG, SDLoc(N)); | |||
51400 | } | |||
51401 | ||||
51402 | if (InVec.getOpcode() == ISD::BUILD_VECTOR) | |||
51403 | return DAG.getBuildVector( | |||
51404 | VT, SDLoc(N), | |||
51405 | InVec.getNode()->ops().slice(IdxVal, VT.getVectorNumElements())); | |||
51406 | ||||
51407 | // If we are extracting from an insert into a zero vector, replace with a | |||
51408 | // smaller insert into zero if we don't access less than the original | |||
51409 | // subvector. Don't do this for i1 vectors. | |||
51410 | if (VT.getVectorElementType() != MVT::i1 && | |||
51411 | InVec.getOpcode() == ISD::INSERT_SUBVECTOR && IdxVal == 0 && | |||
51412 | InVec.hasOneUse() && isNullConstant(InVec.getOperand(2)) && | |||
51413 | ISD::isBuildVectorAllZeros(InVec.getOperand(0).getNode()) && | |||
51414 | InVec.getOperand(1).getValueSizeInBits() <= SizeInBits) { | |||
51415 | SDLoc DL(N); | |||
51416 | return DAG.getNode(ISD::INSERT_SUBVECTOR, DL, VT, | |||
51417 | getZeroVector(VT, Subtarget, DAG, DL), | |||
51418 | InVec.getOperand(1), InVec.getOperand(2)); | |||
51419 | } | |||
51420 | ||||
51421 | // If we're extracting an upper subvector from a broadcast we should just | |||
51422 | // extract the lowest subvector instead which should allow | |||
51423 | // SimplifyDemandedVectorElts do more simplifications. | |||
51424 | if (IdxVal != 0 && (InVec.getOpcode() == X86ISD::VBROADCAST || | |||
51425 | InVec.getOpcode() == X86ISD::VBROADCAST_LOAD || | |||
51426 | DAG.isSplatValue(InVec, /*AllowUndefs*/ false))) | |||
51427 | return extractSubVector(InVec, 0, DAG, SDLoc(N), SizeInBits); | |||
51428 | ||||
51429 | // If we're extracting a broadcasted subvector, just use the lowest subvector. | |||
51430 | if (IdxVal != 0 && InVec.getOpcode() == X86ISD::SUBV_BROADCAST_LOAD && | |||
51431 | cast<MemIntrinsicSDNode>(InVec)->getMemoryVT() == VT) | |||
51432 | return extractSubVector(InVec, 0, DAG, SDLoc(N), SizeInBits); | |||
51433 | ||||
51434 | // Attempt to extract from the source of a shuffle vector. | |||
51435 | if ((InSizeInBits % SizeInBits) == 0 && | |||
51436 | (IdxVal % VT.getVectorNumElements()) == 0) { | |||
51437 | SmallVector<int, 32> ShuffleMask; | |||
51438 | SmallVector<int, 32> ScaledMask; | |||
51439 | SmallVector<SDValue, 2> ShuffleInputs; | |||
51440 | unsigned NumSubVecs = InSizeInBits / SizeInBits; | |||
51441 | // Decode the shuffle mask and scale it so its shuffling subvectors. | |||
51442 | if (getTargetShuffleInputs(InVecBC, ShuffleInputs, ShuffleMask, DAG) && | |||
51443 | scaleShuffleElements(ShuffleMask, NumSubVecs, ScaledMask)) { | |||
51444 | unsigned SubVecIdx = IdxVal / VT.getVectorNumElements(); | |||
51445 | if (ScaledMask[SubVecIdx] == SM_SentinelUndef) | |||
51446 | return DAG.getUNDEF(VT); | |||
51447 | if (ScaledMask[SubVecIdx] == SM_SentinelZero) | |||
51448 | return getZeroVector(VT, Subtarget, DAG, SDLoc(N)); | |||
51449 | SDValue Src = ShuffleInputs[ScaledMask[SubVecIdx] / NumSubVecs]; | |||
51450 | if (Src.getValueSizeInBits() == InSizeInBits) { | |||
51451 | unsigned SrcSubVecIdx = ScaledMask[SubVecIdx] % NumSubVecs; | |||
51452 | unsigned SrcEltIdx = SrcSubVecIdx * VT.getVectorNumElements(); | |||
51453 | return extractSubVector(DAG.getBitcast(InVecVT, Src), SrcEltIdx, DAG, | |||
51454 | SDLoc(N), SizeInBits); | |||
51455 | } | |||
51456 | } | |||
51457 | } | |||
51458 | ||||
51459 | // If we're extracting the lowest subvector and we're the only user, | |||
51460 | // we may be able to perform this with a smaller vector width. | |||
51461 | unsigned InOpcode = InVec.getOpcode(); | |||
51462 | if (IdxVal == 0 && InVec.hasOneUse()) { | |||
51463 | if (VT == MVT::v2f64 && InVecVT == MVT::v4f64) { | |||
51464 | // v2f64 CVTDQ2PD(v4i32). | |||
51465 | if (InOpcode == ISD::SINT_TO_FP && | |||
51466 | InVec.getOperand(0).getValueType() == MVT::v4i32) { | |||
51467 | return DAG.getNode(X86ISD::CVTSI2P, SDLoc(N), VT, InVec.getOperand(0)); | |||
51468 | } | |||
51469 | // v2f64 CVTUDQ2PD(v4i32). | |||
51470 | if (InOpcode == ISD::UINT_TO_FP && Subtarget.hasVLX() && | |||
51471 | InVec.getOperand(0).getValueType() == MVT::v4i32) { | |||
51472 | return DAG.getNode(X86ISD::CVTUI2P, SDLoc(N), VT, InVec.getOperand(0)); | |||
51473 | } | |||
51474 | // v2f64 CVTPS2PD(v4f32). | |||
51475 | if (InOpcode == ISD::FP_EXTEND && | |||
51476 | InVec.getOperand(0).getValueType() == MVT::v4f32) { | |||
51477 | return DAG.getNode(X86ISD::VFPEXT, SDLoc(N), VT, InVec.getOperand(0)); | |||
51478 | } | |||
51479 | } | |||
51480 | if ((InOpcode == ISD::ANY_EXTEND || | |||
51481 | InOpcode == ISD::ANY_EXTEND_VECTOR_INREG || | |||
51482 | InOpcode == ISD::ZERO_EXTEND || | |||
51483 | InOpcode == ISD::ZERO_EXTEND_VECTOR_INREG || | |||
51484 | InOpcode == ISD::SIGN_EXTEND || | |||
51485 | InOpcode == ISD::SIGN_EXTEND_VECTOR_INREG) && | |||
51486 | (SizeInBits == 128 || SizeInBits == 256) && | |||
51487 | InVec.getOperand(0).getValueSizeInBits() >= SizeInBits) { | |||
51488 | SDLoc DL(N); | |||
51489 | SDValue Ext = InVec.getOperand(0); | |||
51490 | if (Ext.getValueSizeInBits() > SizeInBits) | |||
51491 | Ext = extractSubVector(Ext, 0, DAG, DL, SizeInBits); | |||
51492 | unsigned ExtOp = getOpcode_EXTEND_VECTOR_INREG(InOpcode); | |||
51493 | return DAG.getNode(ExtOp, DL, VT, Ext); | |||
51494 | } | |||
51495 | if (InOpcode == ISD::VSELECT && | |||
51496 | InVec.getOperand(0).getValueType().is256BitVector() && | |||
51497 | InVec.getOperand(1).getValueType().is256BitVector() && | |||
51498 | InVec.getOperand(2).getValueType().is256BitVector()) { | |||
51499 | SDLoc DL(N); | |||
51500 | SDValue Ext0 = extractSubVector(InVec.getOperand(0), 0, DAG, DL, 128); | |||
51501 | SDValue Ext1 = extractSubVector(InVec.getOperand(1), 0, DAG, DL, 128); | |||
51502 | SDValue Ext2 = extractSubVector(InVec.getOperand(2), 0, DAG, DL, 128); | |||
51503 | return DAG.getNode(InOpcode, DL, VT, Ext0, Ext1, Ext2); | |||
51504 | } | |||
51505 | if (InOpcode == ISD::TRUNCATE && Subtarget.hasVLX() && | |||
51506 | (VT.is128BitVector() || VT.is256BitVector())) { | |||
51507 | SDLoc DL(N); | |||
51508 | SDValue InVecSrc = InVec.getOperand(0); | |||
51509 | unsigned Scale = InVecSrc.getValueSizeInBits() / InSizeInBits; | |||
51510 | SDValue Ext = extractSubVector(InVecSrc, 0, DAG, DL, Scale * SizeInBits); | |||
51511 | return DAG.getNode(InOpcode, DL, VT, Ext); | |||
51512 | } | |||
51513 | } | |||
51514 | ||||
51515 | // Always split vXi64 logical shifts where we're extracting the upper 32-bits | |||
51516 | // as this is very likely to fold into a shuffle/truncation. | |||
51517 | if ((InOpcode == X86ISD::VSHLI || InOpcode == X86ISD::VSRLI) && | |||
51518 | InVecVT.getScalarSizeInBits() == 64 && | |||
51519 | InVec.getConstantOperandAPInt(1) == 32) { | |||
51520 | SDLoc DL(N); | |||
51521 | SDValue Ext = | |||
51522 | extractSubVector(InVec.getOperand(0), IdxVal, DAG, DL, SizeInBits); | |||
51523 | return DAG.getNode(InOpcode, DL, VT, Ext, InVec.getOperand(1)); | |||
51524 | } | |||
51525 | ||||
51526 | return SDValue(); | |||
51527 | } | |||
51528 | ||||
51529 | static SDValue combineScalarToVector(SDNode *N, SelectionDAG &DAG) { | |||
51530 | EVT VT = N->getValueType(0); | |||
51531 | SDValue Src = N->getOperand(0); | |||
51532 | SDLoc DL(N); | |||
51533 | ||||
51534 | // If this is a scalar to vector to v1i1 from an AND with 1, bypass the and. | |||
51535 | // This occurs frequently in our masked scalar intrinsic code and our | |||
51536 | // floating point select lowering with AVX512. | |||
51537 | // TODO: SimplifyDemandedBits instead? | |||
51538 | if (VT == MVT::v1i1 && Src.getOpcode() == ISD::AND && Src.hasOneUse()) | |||
51539 | if (auto *C = dyn_cast<ConstantSDNode>(Src.getOperand(1))) | |||
51540 | if (C->getAPIntValue().isOneValue()) | |||
51541 | return DAG.getNode(ISD::SCALAR_TO_VECTOR, DL, MVT::v1i1, | |||
51542 | Src.getOperand(0)); | |||
51543 | ||||
51544 | // Combine scalar_to_vector of an extract_vector_elt into an extract_subvec. | |||
51545 | if (VT == MVT::v1i1 && Src.getOpcode() == ISD::EXTRACT_VECTOR_ELT && | |||
51546 | Src.hasOneUse() && Src.getOperand(0).getValueType().isVector() && | |||
51547 | Src.getOperand(0).getValueType().getVectorElementType() == MVT::i1) | |||
51548 | if (auto *C = dyn_cast<ConstantSDNode>(Src.getOperand(1))) | |||
51549 | if (C->isNullValue()) | |||
51550 | return DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, VT, Src.getOperand(0), | |||
51551 | Src.getOperand(1)); | |||
51552 | ||||
51553 | // Reduce v2i64 to v4i32 if we don't need the upper bits. | |||
51554 | // TODO: Move to DAGCombine/SimplifyDemandedBits? | |||
51555 | if (VT == MVT::v2i64 || VT == MVT::v2f64) { | |||
51556 | auto IsAnyExt64 = [](SDValue Op) { | |||
51557 | if (Op.getValueType() != MVT::i64 || !Op.hasOneUse()) | |||
51558 | return SDValue(); | |||
51559 | if (Op.getOpcode() == ISD::ANY_EXTEND && | |||
51560 | Op.getOperand(0).getScalarValueSizeInBits() <= 32) | |||
51561 | return Op.getOperand(0); | |||
51562 | if (auto *Ld = dyn_cast<LoadSDNode>(Op)) | |||
51563 | if (Ld->getExtensionType() == ISD::EXTLOAD && | |||
51564 | Ld->getMemoryVT().getScalarSizeInBits() <= 32) | |||
51565 | return Op; | |||
51566 | return SDValue(); | |||
51567 | }; | |||
51568 | if (SDValue ExtSrc = IsAnyExt64(peekThroughOneUseBitcasts(Src))) | |||
51569 | return DAG.getBitcast( | |||
51570 | VT, DAG.getNode(ISD::SCALAR_TO_VECTOR, DL, MVT::v4i32, | |||
51571 | DAG.getAnyExtOrTrunc(ExtSrc, DL, MVT::i32))); | |||
51572 | } | |||
51573 | ||||
51574 | // Combine (v2i64 (scalar_to_vector (i64 (bitconvert (mmx))))) to MOVQ2DQ. | |||
51575 | if (VT == MVT::v2i64 && Src.getOpcode() == ISD::BITCAST && | |||
51576 | Src.getOperand(0).getValueType() == MVT::x86mmx) | |||
51577 | return DAG.getNode(X86ISD::MOVQ2DQ, DL, VT, Src.getOperand(0)); | |||
51578 | ||||
51579 | // See if we're broadcasting the scalar value, in which case just reuse that. | |||
51580 | // Ensure the same SDValue from the SDNode use is being used. | |||
51581 | if (VT.getScalarType() == Src.getValueType()) | |||
51582 | for (SDNode *User : Src->uses()) | |||
51583 | if (User->getOpcode() == X86ISD::VBROADCAST && | |||
51584 | Src == User->getOperand(0)) { | |||
51585 | unsigned SizeInBits = VT.getFixedSizeInBits(); | |||
51586 | unsigned BroadcastSizeInBits = | |||
51587 | User->getValueSizeInBits(0).getFixedSize(); | |||
51588 | if (BroadcastSizeInBits == SizeInBits) | |||
51589 | return SDValue(User, 0); | |||
51590 | if (BroadcastSizeInBits > SizeInBits) | |||
51591 | return extractSubVector(SDValue(User, 0), 0, DAG, DL, SizeInBits); | |||
51592 | // TODO: Handle BroadcastSizeInBits < SizeInBits when we have test | |||
51593 | // coverage. | |||
51594 | } | |||
51595 | ||||
51596 | return SDValue(); | |||
51597 | } | |||
51598 | ||||
51599 | // Simplify PMULDQ and PMULUDQ operations. | |||
51600 | static SDValue combinePMULDQ(SDNode *N, SelectionDAG &DAG, | |||
51601 | TargetLowering::DAGCombinerInfo &DCI, | |||
51602 | const X86Subtarget &Subtarget) { | |||
51603 | SDValue LHS = N->getOperand(0); | |||
51604 | SDValue RHS = N->getOperand(1); | |||
51605 | ||||
51606 | // Canonicalize constant to RHS. | |||
51607 | if (DAG.isConstantIntBuildVectorOrConstantInt(LHS) && | |||
51608 | !DAG.isConstantIntBuildVectorOrConstantInt(RHS)) | |||
51609 | return DAG.getNode(N->getOpcode(), SDLoc(N), N->getValueType(0), RHS, LHS); | |||
51610 | ||||
51611 | // Multiply by zero. | |||
51612 | // Don't return RHS as it may contain UNDEFs. | |||
51613 | if (ISD::isBuildVectorAllZeros(RHS.getNode())) | |||
51614 | return DAG.getConstant(0, SDLoc(N), N->getValueType(0)); | |||
51615 | ||||
51616 | // PMULDQ/PMULUDQ only uses lower 32 bits from each vector element. | |||
51617 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
51618 | if (TLI.SimplifyDemandedBits(SDValue(N, 0), APInt::getAllOnesValue(64), DCI)) | |||
51619 | return SDValue(N, 0); | |||
51620 | ||||
51621 | // If the input is an extend_invec and the SimplifyDemandedBits call didn't | |||
51622 | // convert it to any_extend_invec, due to the LegalOperations check, do the | |||
51623 | // conversion directly to a vector shuffle manually. This exposes combine | |||
51624 | // opportunities missed by combineEXTEND_VECTOR_INREG not calling | |||
51625 | // combineX86ShufflesRecursively on SSE4.1 targets. | |||
51626 | // FIXME: This is basically a hack around several other issues related to | |||
51627 | // ANY_EXTEND_VECTOR_INREG. | |||
51628 | if (N->getValueType(0) == MVT::v2i64 && LHS.hasOneUse() && | |||
51629 | (LHS.getOpcode() == ISD::ZERO_EXTEND_VECTOR_INREG || | |||
51630 | LHS.getOpcode() == ISD::SIGN_EXTEND_VECTOR_INREG) && | |||
51631 | LHS.getOperand(0).getValueType() == MVT::v4i32) { | |||
51632 | SDLoc dl(N); | |||
51633 | LHS = DAG.getVectorShuffle(MVT::v4i32, dl, LHS.getOperand(0), | |||
51634 | LHS.getOperand(0), { 0, -1, 1, -1 }); | |||
51635 | LHS = DAG.getBitcast(MVT::v2i64, LHS); | |||
51636 | return DAG.getNode(N->getOpcode(), dl, MVT::v2i64, LHS, RHS); | |||
51637 | } | |||
51638 | if (N->getValueType(0) == MVT::v2i64 && RHS.hasOneUse() && | |||
51639 | (RHS.getOpcode() == ISD::ZERO_EXTEND_VECTOR_INREG || | |||
51640 | RHS.getOpcode() == ISD::SIGN_EXTEND_VECTOR_INREG) && | |||
51641 | RHS.getOperand(0).getValueType() == MVT::v4i32) { | |||
51642 | SDLoc dl(N); | |||
51643 | RHS = DAG.getVectorShuffle(MVT::v4i32, dl, RHS.getOperand(0), | |||
51644 | RHS.getOperand(0), { 0, -1, 1, -1 }); | |||
51645 | RHS = DAG.getBitcast(MVT::v2i64, RHS); | |||
51646 | return DAG.getNode(N->getOpcode(), dl, MVT::v2i64, LHS, RHS); | |||
51647 | } | |||
51648 | ||||
51649 | return SDValue(); | |||
51650 | } | |||
51651 | ||||
51652 | static SDValue combineEXTEND_VECTOR_INREG(SDNode *N, SelectionDAG &DAG, | |||
51653 | TargetLowering::DAGCombinerInfo &DCI, | |||
51654 | const X86Subtarget &Subtarget) { | |||
51655 | EVT VT = N->getValueType(0); | |||
51656 | SDValue In = N->getOperand(0); | |||
51657 | unsigned Opcode = N->getOpcode(); | |||
51658 | unsigned InOpcode = In.getOpcode(); | |||
51659 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
51660 | ||||
51661 | // Try to merge vector loads and extend_inreg to an extload. | |||
51662 | if (!DCI.isBeforeLegalizeOps() && ISD::isNormalLoad(In.getNode()) && | |||
51663 | In.hasOneUse()) { | |||
51664 | auto *Ld = cast<LoadSDNode>(In); | |||
51665 | if (Ld->isSimple()) { | |||
51666 | MVT SVT = In.getSimpleValueType().getVectorElementType(); | |||
51667 | ISD::LoadExtType Ext = Opcode == ISD::SIGN_EXTEND_VECTOR_INREG | |||
51668 | ? ISD::SEXTLOAD | |||
51669 | : ISD::ZEXTLOAD; | |||
51670 | EVT MemVT = VT.changeVectorElementType(SVT); | |||
51671 | if (TLI.isLoadExtLegal(Ext, VT, MemVT)) { | |||
51672 | SDValue Load = | |||
51673 | DAG.getExtLoad(Ext, SDLoc(N), VT, Ld->getChain(), Ld->getBasePtr(), | |||
51674 | Ld->getPointerInfo(), MemVT, Ld->getOriginalAlign(), | |||
51675 | Ld->getMemOperand()->getFlags()); | |||
51676 | DAG.ReplaceAllUsesOfValueWith(SDValue(Ld, 1), Load.getValue(1)); | |||
51677 | return Load; | |||
51678 | } | |||
51679 | } | |||
51680 | } | |||
51681 | ||||
51682 | // Fold EXTEND_VECTOR_INREG(EXTEND_VECTOR_INREG(X)) -> EXTEND_VECTOR_INREG(X). | |||
51683 | if (Opcode == InOpcode) | |||
51684 | return DAG.getNode(Opcode, SDLoc(N), VT, In.getOperand(0)); | |||
51685 | ||||
51686 | // Fold EXTEND_VECTOR_INREG(EXTRACT_SUBVECTOR(EXTEND(X),0)) | |||
51687 | // -> EXTEND_VECTOR_INREG(X). | |||
51688 | // TODO: Handle non-zero subvector indices. | |||
51689 | if (InOpcode == ISD::EXTRACT_SUBVECTOR && In.getConstantOperandVal(1) == 0 && | |||
51690 | In.getOperand(0).getOpcode() == getOpcode_EXTEND(Opcode) && | |||
51691 | In.getOperand(0).getOperand(0).getValueSizeInBits() == | |||
51692 | In.getValueSizeInBits()) | |||
51693 | return DAG.getNode(Opcode, SDLoc(N), VT, In.getOperand(0).getOperand(0)); | |||
51694 | ||||
51695 | // Attempt to combine as a shuffle. | |||
51696 | // TODO: General ZERO_EXTEND_VECTOR_INREG support. | |||
51697 | if (Opcode == ISD::ANY_EXTEND_VECTOR_INREG || | |||
51698 | (Opcode == ISD::ZERO_EXTEND_VECTOR_INREG && Subtarget.hasSSE41())) { | |||
51699 | SDValue Op(N, 0); | |||
51700 | if (TLI.isTypeLegal(VT) && TLI.isTypeLegal(In.getValueType())) | |||
51701 | if (SDValue Res = combineX86ShufflesRecursively(Op, DAG, Subtarget)) | |||
51702 | return Res; | |||
51703 | } | |||
51704 | ||||
51705 | return SDValue(); | |||
51706 | } | |||
51707 | ||||
51708 | static SDValue combineKSHIFT(SDNode *N, SelectionDAG &DAG, | |||
51709 | TargetLowering::DAGCombinerInfo &DCI) { | |||
51710 | EVT VT = N->getValueType(0); | |||
51711 | ||||
51712 | if (ISD::isBuildVectorAllZeros(N->getOperand(0).getNode())) | |||
51713 | return DAG.getConstant(0, SDLoc(N), VT); | |||
51714 | ||||
51715 | APInt KnownUndef, KnownZero; | |||
51716 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
51717 | APInt DemandedElts = APInt::getAllOnesValue(VT.getVectorNumElements()); | |||
51718 | if (TLI.SimplifyDemandedVectorElts(SDValue(N, 0), DemandedElts, KnownUndef, | |||
51719 | KnownZero, DCI)) | |||
51720 | return SDValue(N, 0); | |||
51721 | ||||
51722 | return SDValue(); | |||
51723 | } | |||
51724 | ||||
51725 | // Optimize (fp16_to_fp (fp_to_fp16 X)) to VCVTPS2PH followed by VCVTPH2PS. | |||
51726 | // Done as a combine because the lowering for fp16_to_fp and fp_to_fp16 produce | |||
51727 | // extra instructions between the conversion due to going to scalar and back. | |||
51728 | static SDValue combineFP16_TO_FP(SDNode *N, SelectionDAG &DAG, | |||
51729 | const X86Subtarget &Subtarget) { | |||
51730 | if (Subtarget.useSoftFloat() || !Subtarget.hasF16C()) | |||
51731 | return SDValue(); | |||
51732 | ||||
51733 | if (N->getOperand(0).getOpcode() != ISD::FP_TO_FP16) | |||
51734 | return SDValue(); | |||
51735 | ||||
51736 | if (N->getValueType(0) != MVT::f32 || | |||
51737 | N->getOperand(0).getOperand(0).getValueType() != MVT::f32) | |||
51738 | return SDValue(); | |||
51739 | ||||
51740 | SDLoc dl(N); | |||
51741 | SDValue Res = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4f32, | |||
51742 | N->getOperand(0).getOperand(0)); | |||
51743 | Res = DAG.getNode(X86ISD::CVTPS2PH, dl, MVT::v8i16, Res, | |||
51744 | DAG.getTargetConstant(4, dl, MVT::i32)); | |||
51745 | Res = DAG.getNode(X86ISD::CVTPH2PS, dl, MVT::v4f32, Res); | |||
51746 | return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f32, Res, | |||
51747 | DAG.getIntPtrConstant(0, dl)); | |||
51748 | } | |||
51749 | ||||
51750 | static SDValue combineFP_EXTEND(SDNode *N, SelectionDAG &DAG, | |||
51751 | const X86Subtarget &Subtarget) { | |||
51752 | if (!Subtarget.hasF16C() || Subtarget.useSoftFloat()) | |||
51753 | return SDValue(); | |||
51754 | ||||
51755 | if (Subtarget.hasFP16()) | |||
51756 | return SDValue(); | |||
51757 | ||||
51758 | bool IsStrict = N->isStrictFPOpcode(); | |||
51759 | EVT VT = N->getValueType(0); | |||
51760 | SDValue Src = N->getOperand(IsStrict ? 1 : 0); | |||
51761 | EVT SrcVT = Src.getValueType(); | |||
51762 | ||||
51763 | if (!SrcVT.isVector() || SrcVT.getVectorElementType() != MVT::f16) | |||
51764 | return SDValue(); | |||
51765 | ||||
51766 | if (VT.getVectorElementType() != MVT::f32 && | |||
51767 | VT.getVectorElementType() != MVT::f64) | |||
51768 | return SDValue(); | |||
51769 | ||||
51770 | unsigned NumElts = VT.getVectorNumElements(); | |||
51771 | if (NumElts == 1 || !isPowerOf2_32(NumElts)) | |||
51772 | return SDValue(); | |||
51773 | ||||
51774 | SDLoc dl(N); | |||
51775 | ||||
51776 | // Convert the input to vXi16. | |||
51777 | EVT IntVT = SrcVT.changeVectorElementTypeToInteger(); | |||
51778 | Src = DAG.getBitcast(IntVT, Src); | |||
51779 | ||||
51780 | // Widen to at least 8 input elements. | |||
51781 | if (NumElts < 8) { | |||
51782 | unsigned NumConcats = 8 / NumElts; | |||
51783 | SDValue Fill = NumElts == 4 ? DAG.getUNDEF(IntVT) | |||
51784 | : DAG.getConstant(0, dl, IntVT); | |||
51785 | SmallVector<SDValue, 4> Ops(NumConcats, Fill); | |||
51786 | Ops[0] = Src; | |||
51787 | Src = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v8i16, Ops); | |||
51788 | } | |||
51789 | ||||
51790 | // Destination is vXf32 with at least 4 elements. | |||
51791 | EVT CvtVT = EVT::getVectorVT(*DAG.getContext(), MVT::f32, | |||
51792 | std::max(4U, NumElts)); | |||
51793 | SDValue Cvt, Chain; | |||
51794 | if (IsStrict) { | |||
51795 | Cvt = DAG.getNode(X86ISD::STRICT_CVTPH2PS, dl, {CvtVT, MVT::Other}, | |||
51796 | {N->getOperand(0), Src}); | |||
51797 | Chain = Cvt.getValue(1); | |||
51798 | } else { | |||
51799 | Cvt = DAG.getNode(X86ISD::CVTPH2PS, dl, CvtVT, Src); | |||
51800 | } | |||
51801 | ||||
51802 | if (NumElts < 4) { | |||
51803 | assert(NumElts == 2 && "Unexpected size")(static_cast <bool> (NumElts == 2 && "Unexpected size" ) ? void (0) : __assert_fail ("NumElts == 2 && \"Unexpected size\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 51803, __extension__ __PRETTY_FUNCTION__)); | |||
51804 | Cvt = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v2f32, Cvt, | |||
51805 | DAG.getIntPtrConstant(0, dl)); | |||
51806 | } | |||
51807 | ||||
51808 | if (IsStrict) { | |||
51809 | // Extend to the original VT if necessary. | |||
51810 | if (Cvt.getValueType() != VT) { | |||
51811 | Cvt = DAG.getNode(ISD::STRICT_FP_EXTEND, dl, {VT, MVT::Other}, | |||
51812 | {Chain, Cvt}); | |||
51813 | Chain = Cvt.getValue(1); | |||
51814 | } | |||
51815 | return DAG.getMergeValues({Cvt, Chain}, dl); | |||
51816 | } | |||
51817 | ||||
51818 | // Extend to the original VT if necessary. | |||
51819 | return DAG.getNode(ISD::FP_EXTEND, dl, VT, Cvt); | |||
51820 | } | |||
51821 | ||||
51822 | // Try to find a larger VBROADCAST_LOAD/SUBV_BROADCAST_LOAD that we can extract | |||
51823 | // from. Limit this to cases where the loads have the same input chain and the | |||
51824 | // output chains are unused. This avoids any memory ordering issues. | |||
51825 | static SDValue combineBROADCAST_LOAD(SDNode *N, SelectionDAG &DAG, | |||
51826 | TargetLowering::DAGCombinerInfo &DCI) { | |||
51827 | assert((N->getOpcode() == X86ISD::VBROADCAST_LOAD ||(static_cast <bool> ((N->getOpcode() == X86ISD::VBROADCAST_LOAD || N->getOpcode() == X86ISD::SUBV_BROADCAST_LOAD) && "Unknown broadcast load type") ? void (0) : __assert_fail ("(N->getOpcode() == X86ISD::VBROADCAST_LOAD || N->getOpcode() == X86ISD::SUBV_BROADCAST_LOAD) && \"Unknown broadcast load type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 51829, __extension__ __PRETTY_FUNCTION__)) | |||
51828 | N->getOpcode() == X86ISD::SUBV_BROADCAST_LOAD) &&(static_cast <bool> ((N->getOpcode() == X86ISD::VBROADCAST_LOAD || N->getOpcode() == X86ISD::SUBV_BROADCAST_LOAD) && "Unknown broadcast load type") ? void (0) : __assert_fail ("(N->getOpcode() == X86ISD::VBROADCAST_LOAD || N->getOpcode() == X86ISD::SUBV_BROADCAST_LOAD) && \"Unknown broadcast load type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 51829, __extension__ __PRETTY_FUNCTION__)) | |||
51829 | "Unknown broadcast load type")(static_cast <bool> ((N->getOpcode() == X86ISD::VBROADCAST_LOAD || N->getOpcode() == X86ISD::SUBV_BROADCAST_LOAD) && "Unknown broadcast load type") ? void (0) : __assert_fail ("(N->getOpcode() == X86ISD::VBROADCAST_LOAD || N->getOpcode() == X86ISD::SUBV_BROADCAST_LOAD) && \"Unknown broadcast load type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 51829, __extension__ __PRETTY_FUNCTION__)); | |||
51830 | ||||
51831 | // Only do this if the chain result is unused. | |||
51832 | if (N->hasAnyUseOfValue(1)) | |||
51833 | return SDValue(); | |||
51834 | ||||
51835 | auto *MemIntrin = cast<MemIntrinsicSDNode>(N); | |||
51836 | ||||
51837 | SDValue Ptr = MemIntrin->getBasePtr(); | |||
51838 | SDValue Chain = MemIntrin->getChain(); | |||
51839 | EVT VT = N->getSimpleValueType(0); | |||
51840 | EVT MemVT = MemIntrin->getMemoryVT(); | |||
51841 | ||||
51842 | // Look at other users of our base pointer and try to find a wider broadcast. | |||
51843 | // The input chain and the size of the memory VT must match. | |||
51844 | for (SDNode *User : Ptr->uses()) | |||
51845 | if (User != N && User->getOpcode() == N->getOpcode() && | |||
51846 | cast<MemIntrinsicSDNode>(User)->getBasePtr() == Ptr && | |||
51847 | cast<MemIntrinsicSDNode>(User)->getChain() == Chain && | |||
51848 | cast<MemIntrinsicSDNode>(User)->getMemoryVT().getSizeInBits() == | |||
51849 | MemVT.getSizeInBits() && | |||
51850 | !User->hasAnyUseOfValue(1) && | |||
51851 | User->getValueSizeInBits(0).getFixedSize() > VT.getFixedSizeInBits()) { | |||
51852 | SDValue Extract = extractSubVector(SDValue(User, 0), 0, DAG, SDLoc(N), | |||
51853 | VT.getSizeInBits()); | |||
51854 | Extract = DAG.getBitcast(VT, Extract); | |||
51855 | return DCI.CombineTo(N, Extract, SDValue(User, 1)); | |||
51856 | } | |||
51857 | ||||
51858 | return SDValue(); | |||
51859 | } | |||
51860 | ||||
51861 | static SDValue combineFP_ROUND(SDNode *N, SelectionDAG &DAG, | |||
51862 | const X86Subtarget &Subtarget) { | |||
51863 | if (!Subtarget.hasF16C() || Subtarget.useSoftFloat()) | |||
51864 | return SDValue(); | |||
51865 | ||||
51866 | if (Subtarget.hasFP16()) | |||
51867 | return SDValue(); | |||
51868 | ||||
51869 | EVT VT = N->getValueType(0); | |||
51870 | SDValue Src = N->getOperand(0); | |||
51871 | EVT SrcVT = Src.getValueType(); | |||
51872 | ||||
51873 | if (!VT.isVector() || VT.getVectorElementType() != MVT::f16 || | |||
51874 | SrcVT.getVectorElementType() != MVT::f32) | |||
51875 | return SDValue(); | |||
51876 | ||||
51877 | unsigned NumElts = VT.getVectorNumElements(); | |||
51878 | if (NumElts == 1 || !isPowerOf2_32(NumElts)) | |||
51879 | return SDValue(); | |||
51880 | ||||
51881 | SDLoc dl(N); | |||
51882 | ||||
51883 | // Widen to at least 4 input elements. | |||
51884 | if (NumElts < 4) | |||
51885 | Src = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v4f32, Src, | |||
51886 | DAG.getConstantFP(0.0, dl, SrcVT)); | |||
51887 | ||||
51888 | // Destination is v8i16 with at least 8 elements. | |||
51889 | EVT CvtVT = EVT::getVectorVT(*DAG.getContext(), MVT::i16, | |||
51890 | std::max(8U, NumElts)); | |||
51891 | SDValue Cvt = DAG.getNode(X86ISD::CVTPS2PH, dl, CvtVT, Src, | |||
51892 | DAG.getTargetConstant(4, dl, MVT::i32)); | |||
51893 | ||||
51894 | // Extract down to real number of elements. | |||
51895 | if (NumElts < 8) { | |||
51896 | EVT IntVT = VT.changeVectorElementTypeToInteger(); | |||
51897 | Cvt = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, IntVT, Cvt, | |||
51898 | DAG.getIntPtrConstant(0, dl)); | |||
51899 | } | |||
51900 | ||||
51901 | return DAG.getBitcast(VT, Cvt); | |||
51902 | } | |||
51903 | ||||
51904 | static SDValue combineMOVDQ2Q(SDNode *N, SelectionDAG &DAG) { | |||
51905 | SDValue Src = N->getOperand(0); | |||
51906 | ||||
51907 | // Turn MOVDQ2Q+simple_load into an mmx load. | |||
51908 | if (ISD::isNormalLoad(Src.getNode()) && Src.hasOneUse()) { | |||
51909 | LoadSDNode *LN = cast<LoadSDNode>(Src.getNode()); | |||
51910 | ||||
51911 | if (LN->isSimple()) { | |||
51912 | SDValue NewLd = DAG.getLoad(MVT::x86mmx, SDLoc(N), LN->getChain(), | |||
51913 | LN->getBasePtr(), | |||
51914 | LN->getPointerInfo(), | |||
51915 | LN->getOriginalAlign(), | |||
51916 | LN->getMemOperand()->getFlags()); | |||
51917 | DAG.ReplaceAllUsesOfValueWith(SDValue(LN, 1), NewLd.getValue(1)); | |||
51918 | return NewLd; | |||
51919 | } | |||
51920 | } | |||
51921 | ||||
51922 | return SDValue(); | |||
51923 | } | |||
51924 | ||||
51925 | static SDValue combinePDEP(SDNode *N, SelectionDAG &DAG, | |||
51926 | TargetLowering::DAGCombinerInfo &DCI) { | |||
51927 | unsigned NumBits = N->getSimpleValueType(0).getSizeInBits(); | |||
51928 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
51929 | if (TLI.SimplifyDemandedBits(SDValue(N, 0), | |||
51930 | APInt::getAllOnesValue(NumBits), DCI)) | |||
51931 | return SDValue(N, 0); | |||
51932 | ||||
51933 | return SDValue(); | |||
51934 | } | |||
51935 | ||||
51936 | SDValue X86TargetLowering::PerformDAGCombine(SDNode *N, | |||
51937 | DAGCombinerInfo &DCI) const { | |||
51938 | SelectionDAG &DAG = DCI.DAG; | |||
51939 | switch (N->getOpcode()) { | |||
51940 | default: break; | |||
51941 | case ISD::SCALAR_TO_VECTOR: | |||
51942 | return combineScalarToVector(N, DAG); | |||
51943 | case ISD::EXTRACT_VECTOR_ELT: | |||
51944 | case X86ISD::PEXTRW: | |||
51945 | case X86ISD::PEXTRB: | |||
51946 | return combineExtractVectorElt(N, DAG, DCI, Subtarget); | |||
51947 | case ISD::CONCAT_VECTORS: | |||
51948 | return combineConcatVectors(N, DAG, DCI, Subtarget); | |||
51949 | case ISD::INSERT_SUBVECTOR: | |||
51950 | return combineInsertSubvector(N, DAG, DCI, Subtarget); | |||
51951 | case ISD::EXTRACT_SUBVECTOR: | |||
51952 | return combineExtractSubvector(N, DAG, DCI, Subtarget); | |||
51953 | case ISD::VSELECT: | |||
51954 | case ISD::SELECT: | |||
51955 | case X86ISD::BLENDV: return combineSelect(N, DAG, DCI, Subtarget); | |||
51956 | case ISD::BITCAST: return combineBitcast(N, DAG, DCI, Subtarget); | |||
51957 | case X86ISD::CMOV: return combineCMov(N, DAG, DCI, Subtarget); | |||
51958 | case X86ISD::CMP: return combineCMP(N, DAG); | |||
51959 | case ISD::ADD: return combineAdd(N, DAG, DCI, Subtarget); | |||
51960 | case ISD::SUB: return combineSub(N, DAG, DCI, Subtarget); | |||
51961 | case X86ISD::ADD: | |||
51962 | case X86ISD::SUB: return combineX86AddSub(N, DAG, DCI); | |||
51963 | case X86ISD::SBB: return combineSBB(N, DAG); | |||
51964 | case X86ISD::ADC: return combineADC(N, DAG, DCI); | |||
51965 | case ISD::MUL: return combineMul(N, DAG, DCI, Subtarget); | |||
51966 | case ISD::SHL: return combineShiftLeft(N, DAG); | |||
51967 | case ISD::SRA: return combineShiftRightArithmetic(N, DAG, Subtarget); | |||
51968 | case ISD::SRL: return combineShiftRightLogical(N, DAG, DCI, Subtarget); | |||
51969 | case ISD::AND: return combineAnd(N, DAG, DCI, Subtarget); | |||
51970 | case ISD::OR: return combineOr(N, DAG, DCI, Subtarget); | |||
51971 | case ISD::XOR: return combineXor(N, DAG, DCI, Subtarget); | |||
51972 | case X86ISD::BEXTR: | |||
51973 | case X86ISD::BEXTRI: return combineBEXTR(N, DAG, DCI, Subtarget); | |||
51974 | case ISD::LOAD: return combineLoad(N, DAG, DCI, Subtarget); | |||
51975 | case ISD::MLOAD: return combineMaskedLoad(N, DAG, DCI, Subtarget); | |||
51976 | case ISD::STORE: return combineStore(N, DAG, DCI, Subtarget); | |||
51977 | case ISD::MSTORE: return combineMaskedStore(N, DAG, DCI, Subtarget); | |||
51978 | case X86ISD::VEXTRACT_STORE: | |||
51979 | return combineVEXTRACT_STORE(N, DAG, DCI, Subtarget); | |||
51980 | case ISD::SINT_TO_FP: | |||
51981 | case ISD::STRICT_SINT_TO_FP: | |||
51982 | return combineSIntToFP(N, DAG, DCI, Subtarget); | |||
51983 | case ISD::UINT_TO_FP: | |||
51984 | case ISD::STRICT_UINT_TO_FP: | |||
51985 | return combineUIntToFP(N, DAG, Subtarget); | |||
51986 | case ISD::FADD: | |||
51987 | case ISD::FSUB: return combineFaddFsub(N, DAG, Subtarget); | |||
51988 | case ISD::FNEG: return combineFneg(N, DAG, DCI, Subtarget); | |||
51989 | case ISD::TRUNCATE: return combineTruncate(N, DAG, Subtarget); | |||
51990 | case X86ISD::VTRUNC: return combineVTRUNC(N, DAG, DCI); | |||
51991 | case X86ISD::ANDNP: return combineAndnp(N, DAG, DCI, Subtarget); | |||
51992 | case X86ISD::FAND: return combineFAnd(N, DAG, Subtarget); | |||
51993 | case X86ISD::FANDN: return combineFAndn(N, DAG, Subtarget); | |||
51994 | case X86ISD::FXOR: | |||
51995 | case X86ISD::FOR: return combineFOr(N, DAG, DCI, Subtarget); | |||
51996 | case X86ISD::FMIN: | |||
51997 | case X86ISD::FMAX: return combineFMinFMax(N, DAG); | |||
51998 | case ISD::FMINNUM: | |||
51999 | case ISD::FMAXNUM: return combineFMinNumFMaxNum(N, DAG, Subtarget); | |||
52000 | case X86ISD::CVTSI2P: | |||
52001 | case X86ISD::CVTUI2P: return combineX86INT_TO_FP(N, DAG, DCI); | |||
52002 | case X86ISD::CVTP2SI: | |||
52003 | case X86ISD::CVTP2UI: | |||
52004 | case X86ISD::STRICT_CVTTP2SI: | |||
52005 | case X86ISD::CVTTP2SI: | |||
52006 | case X86ISD::STRICT_CVTTP2UI: | |||
52007 | case X86ISD::CVTTP2UI: | |||
52008 | return combineCVTP2I_CVTTP2I(N, DAG, DCI); | |||
52009 | case X86ISD::STRICT_CVTPH2PS: | |||
52010 | case X86ISD::CVTPH2PS: return combineCVTPH2PS(N, DAG, DCI); | |||
52011 | case X86ISD::BT: return combineBT(N, DAG, DCI); | |||
52012 | case ISD::ANY_EXTEND: | |||
52013 | case ISD::ZERO_EXTEND: return combineZext(N, DAG, DCI, Subtarget); | |||
52014 | case ISD::SIGN_EXTEND: return combineSext(N, DAG, DCI, Subtarget); | |||
52015 | case ISD::SIGN_EXTEND_INREG: return combineSignExtendInReg(N, DAG, Subtarget); | |||
52016 | case ISD::ANY_EXTEND_VECTOR_INREG: | |||
52017 | case ISD::SIGN_EXTEND_VECTOR_INREG: | |||
52018 | case ISD::ZERO_EXTEND_VECTOR_INREG: | |||
52019 | return combineEXTEND_VECTOR_INREG(N, DAG, DCI, Subtarget); | |||
52020 | case ISD::SETCC: return combineSetCC(N, DAG, DCI, Subtarget); | |||
52021 | case X86ISD::SETCC: return combineX86SetCC(N, DAG, Subtarget); | |||
52022 | case X86ISD::BRCOND: return combineBrCond(N, DAG, Subtarget); | |||
52023 | case X86ISD::PACKSS: | |||
52024 | case X86ISD::PACKUS: return combineVectorPack(N, DAG, DCI, Subtarget); | |||
52025 | case X86ISD::HADD: | |||
52026 | case X86ISD::HSUB: | |||
52027 | case X86ISD::FHADD: | |||
52028 | case X86ISD::FHSUB: return combineVectorHADDSUB(N, DAG, DCI, Subtarget); | |||
52029 | case X86ISD::VSHL: | |||
52030 | case X86ISD::VSRA: | |||
52031 | case X86ISD::VSRL: | |||
52032 | return combineVectorShiftVar(N, DAG, DCI, Subtarget); | |||
52033 | case X86ISD::VSHLI: | |||
52034 | case X86ISD::VSRAI: | |||
52035 | case X86ISD::VSRLI: | |||
52036 | return combineVectorShiftImm(N, DAG, DCI, Subtarget); | |||
52037 | case ISD::INSERT_VECTOR_ELT: | |||
52038 | case X86ISD::PINSRB: | |||
52039 | case X86ISD::PINSRW: return combineVectorInsert(N, DAG, DCI, Subtarget); | |||
52040 | case X86ISD::SHUFP: // Handle all target specific shuffles | |||
52041 | case X86ISD::INSERTPS: | |||
52042 | case X86ISD::EXTRQI: | |||
52043 | case X86ISD::INSERTQI: | |||
52044 | case X86ISD::VALIGN: | |||
52045 | case X86ISD::PALIGNR: | |||
52046 | case X86ISD::VSHLDQ: | |||
52047 | case X86ISD::VSRLDQ: | |||
52048 | case X86ISD::BLENDI: | |||
52049 | case X86ISD::UNPCKH: | |||
52050 | case X86ISD::UNPCKL: | |||
52051 | case X86ISD::MOVHLPS: | |||
52052 | case X86ISD::MOVLHPS: | |||
52053 | case X86ISD::PSHUFB: | |||
52054 | case X86ISD::PSHUFD: | |||
52055 | case X86ISD::PSHUFHW: | |||
52056 | case X86ISD::PSHUFLW: | |||
52057 | case X86ISD::MOVSHDUP: | |||
52058 | case X86ISD::MOVSLDUP: | |||
52059 | case X86ISD::MOVDDUP: | |||
52060 | case X86ISD::MOVSS: | |||
52061 | case X86ISD::MOVSD: | |||
52062 | case X86ISD::MOVSH: | |||
52063 | case X86ISD::VBROADCAST: | |||
52064 | case X86ISD::VPPERM: | |||
52065 | case X86ISD::VPERMI: | |||
52066 | case X86ISD::VPERMV: | |||
52067 | case X86ISD::VPERMV3: | |||
52068 | case X86ISD::VPERMIL2: | |||
52069 | case X86ISD::VPERMILPI: | |||
52070 | case X86ISD::VPERMILPV: | |||
52071 | case X86ISD::VPERM2X128: | |||
52072 | case X86ISD::SHUF128: | |||
52073 | case X86ISD::VZEXT_MOVL: | |||
52074 | case ISD::VECTOR_SHUFFLE: return combineShuffle(N, DAG, DCI,Subtarget); | |||
52075 | case X86ISD::FMADD_RND: | |||
52076 | case X86ISD::FMSUB: | |||
52077 | case X86ISD::STRICT_FMSUB: | |||
52078 | case X86ISD::FMSUB_RND: | |||
52079 | case X86ISD::FNMADD: | |||
52080 | case X86ISD::STRICT_FNMADD: | |||
52081 | case X86ISD::FNMADD_RND: | |||
52082 | case X86ISD::FNMSUB: | |||
52083 | case X86ISD::STRICT_FNMSUB: | |||
52084 | case X86ISD::FNMSUB_RND: | |||
52085 | case ISD::FMA: | |||
52086 | case ISD::STRICT_FMA: return combineFMA(N, DAG, DCI, Subtarget); | |||
52087 | case X86ISD::FMADDSUB_RND: | |||
52088 | case X86ISD::FMSUBADD_RND: | |||
52089 | case X86ISD::FMADDSUB: | |||
52090 | case X86ISD::FMSUBADD: return combineFMADDSUB(N, DAG, DCI); | |||
52091 | case X86ISD::MOVMSK: return combineMOVMSK(N, DAG, DCI, Subtarget); | |||
52092 | case X86ISD::MGATHER: | |||
52093 | case X86ISD::MSCATTER: return combineX86GatherScatter(N, DAG, DCI); | |||
52094 | case ISD::MGATHER: | |||
52095 | case ISD::MSCATTER: return combineGatherScatter(N, DAG, DCI); | |||
52096 | case X86ISD::PCMPEQ: | |||
52097 | case X86ISD::PCMPGT: return combineVectorCompare(N, DAG, Subtarget); | |||
52098 | case X86ISD::PMULDQ: | |||
52099 | case X86ISD::PMULUDQ: return combinePMULDQ(N, DAG, DCI, Subtarget); | |||
52100 | case X86ISD::KSHIFTL: | |||
52101 | case X86ISD::KSHIFTR: return combineKSHIFT(N, DAG, DCI); | |||
52102 | case ISD::FP16_TO_FP: return combineFP16_TO_FP(N, DAG, Subtarget); | |||
52103 | case ISD::STRICT_FP_EXTEND: | |||
52104 | case ISD::FP_EXTEND: return combineFP_EXTEND(N, DAG, Subtarget); | |||
52105 | case ISD::FP_ROUND: return combineFP_ROUND(N, DAG, Subtarget); | |||
52106 | case X86ISD::VBROADCAST_LOAD: | |||
52107 | case X86ISD::SUBV_BROADCAST_LOAD: return combineBROADCAST_LOAD(N, DAG, DCI); | |||
52108 | case X86ISD::MOVDQ2Q: return combineMOVDQ2Q(N, DAG); | |||
52109 | case X86ISD::PDEP: return combinePDEP(N, DAG, DCI); | |||
52110 | } | |||
52111 | ||||
52112 | return SDValue(); | |||
52113 | } | |||
52114 | ||||
52115 | bool X86TargetLowering::isTypeDesirableForOp(unsigned Opc, EVT VT) const { | |||
52116 | if (!isTypeLegal(VT)) | |||
52117 | return false; | |||
52118 | ||||
52119 | // There are no vXi8 shifts. | |||
52120 | if (Opc == ISD::SHL && VT.isVector() && VT.getVectorElementType() == MVT::i8) | |||
52121 | return false; | |||
52122 | ||||
52123 | // TODO: Almost no 8-bit ops are desirable because they have no actual | |||
52124 | // size/speed advantages vs. 32-bit ops, but they do have a major | |||
52125 | // potential disadvantage by causing partial register stalls. | |||
52126 | // | |||
52127 | // 8-bit multiply/shl is probably not cheaper than 32-bit multiply/shl, and | |||
52128 | // we have specializations to turn 32-bit multiply/shl into LEA or other ops. | |||
52129 | // Also, see the comment in "IsDesirableToPromoteOp" - where we additionally | |||
52130 | // check for a constant operand to the multiply. | |||
52131 | if ((Opc == ISD::MUL || Opc == ISD::SHL) && VT == MVT::i8) | |||
52132 | return false; | |||
52133 | ||||
52134 | // i16 instruction encodings are longer and some i16 instructions are slow, | |||
52135 | // so those are not desirable. | |||
52136 | if (VT == MVT::i16) { | |||
52137 | switch (Opc) { | |||
52138 | default: | |||
52139 | break; | |||
52140 | case ISD::LOAD: | |||
52141 | case ISD::SIGN_EXTEND: | |||
52142 | case ISD::ZERO_EXTEND: | |||
52143 | case ISD::ANY_EXTEND: | |||
52144 | case ISD::SHL: | |||
52145 | case ISD::SRA: | |||
52146 | case ISD::SRL: | |||
52147 | case ISD::SUB: | |||
52148 | case ISD::ADD: | |||
52149 | case ISD::MUL: | |||
52150 | case ISD::AND: | |||
52151 | case ISD::OR: | |||
52152 | case ISD::XOR: | |||
52153 | return false; | |||
52154 | } | |||
52155 | } | |||
52156 | ||||
52157 | // Any legal type not explicitly accounted for above here is desirable. | |||
52158 | return true; | |||
52159 | } | |||
52160 | ||||
52161 | SDValue X86TargetLowering::expandIndirectJTBranch(const SDLoc& dl, | |||
52162 | SDValue Value, SDValue Addr, | |||
52163 | SelectionDAG &DAG) const { | |||
52164 | const Module *M = DAG.getMachineFunction().getMMI().getModule(); | |||
52165 | Metadata *IsCFProtectionSupported = M->getModuleFlag("cf-protection-branch"); | |||
52166 | if (IsCFProtectionSupported) { | |||
52167 | // In case control-flow branch protection is enabled, we need to add | |||
52168 | // notrack prefix to the indirect branch. | |||
52169 | // In order to do that we create NT_BRIND SDNode. | |||
52170 | // Upon ISEL, the pattern will convert it to jmp with NoTrack prefix. | |||
52171 | return DAG.getNode(X86ISD::NT_BRIND, dl, MVT::Other, Value, Addr); | |||
52172 | } | |||
52173 | ||||
52174 | return TargetLowering::expandIndirectJTBranch(dl, Value, Addr, DAG); | |||
52175 | } | |||
52176 | ||||
52177 | bool X86TargetLowering::IsDesirableToPromoteOp(SDValue Op, EVT &PVT) const { | |||
52178 | EVT VT = Op.getValueType(); | |||
52179 | bool Is8BitMulByConstant = VT == MVT::i8 && Op.getOpcode() == ISD::MUL && | |||
52180 | isa<ConstantSDNode>(Op.getOperand(1)); | |||
52181 | ||||
52182 | // i16 is legal, but undesirable since i16 instruction encodings are longer | |||
52183 | // and some i16 instructions are slow. | |||
52184 | // 8-bit multiply-by-constant can usually be expanded to something cheaper | |||
52185 | // using LEA and/or other ALU ops. | |||
52186 | if (VT != MVT::i16 && !Is8BitMulByConstant) | |||
52187 | return false; | |||
52188 | ||||
52189 | auto IsFoldableRMW = [](SDValue Load, SDValue Op) { | |||
52190 | if (!Op.hasOneUse()) | |||
52191 | return false; | |||
52192 | SDNode *User = *Op->use_begin(); | |||
52193 | if (!ISD::isNormalStore(User)) | |||
52194 | return false; | |||
52195 | auto *Ld = cast<LoadSDNode>(Load); | |||
52196 | auto *St = cast<StoreSDNode>(User); | |||
52197 | return Ld->getBasePtr() == St->getBasePtr(); | |||
52198 | }; | |||
52199 | ||||
52200 | auto IsFoldableAtomicRMW = [](SDValue Load, SDValue Op) { | |||
52201 | if (!Load.hasOneUse() || Load.getOpcode() != ISD::ATOMIC_LOAD) | |||
52202 | return false; | |||
52203 | if (!Op.hasOneUse()) | |||
52204 | return false; | |||
52205 | SDNode *User = *Op->use_begin(); | |||
52206 | if (User->getOpcode() != ISD::ATOMIC_STORE) | |||
52207 | return false; | |||
52208 | auto *Ld = cast<AtomicSDNode>(Load); | |||
52209 | auto *St = cast<AtomicSDNode>(User); | |||
52210 | return Ld->getBasePtr() == St->getBasePtr(); | |||
52211 | }; | |||
52212 | ||||
52213 | bool Commute = false; | |||
52214 | switch (Op.getOpcode()) { | |||
52215 | default: return false; | |||
52216 | case ISD::SIGN_EXTEND: | |||
52217 | case ISD::ZERO_EXTEND: | |||
52218 | case ISD::ANY_EXTEND: | |||
52219 | break; | |||
52220 | case ISD::SHL: | |||
52221 | case ISD::SRA: | |||
52222 | case ISD::SRL: { | |||
52223 | SDValue N0 = Op.getOperand(0); | |||
52224 | // Look out for (store (shl (load), x)). | |||
52225 | if (MayFoldLoad(N0) && IsFoldableRMW(N0, Op)) | |||
52226 | return false; | |||
52227 | break; | |||
52228 | } | |||
52229 | case ISD::ADD: | |||
52230 | case ISD::MUL: | |||
52231 | case ISD::AND: | |||
52232 | case ISD::OR: | |||
52233 | case ISD::XOR: | |||
52234 | Commute = true; | |||
52235 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
52236 | case ISD::SUB: { | |||
52237 | SDValue N0 = Op.getOperand(0); | |||
52238 | SDValue N1 = Op.getOperand(1); | |||
52239 | // Avoid disabling potential load folding opportunities. | |||
52240 | if (MayFoldLoad(N1) && | |||
52241 | (!Commute || !isa<ConstantSDNode>(N0) || | |||
52242 | (Op.getOpcode() != ISD::MUL && IsFoldableRMW(N1, Op)))) | |||
52243 | return false; | |||
52244 | if (MayFoldLoad(N0) && | |||
52245 | ((Commute && !isa<ConstantSDNode>(N1)) || | |||
52246 | (Op.getOpcode() != ISD::MUL && IsFoldableRMW(N0, Op)))) | |||
52247 | return false; | |||
52248 | if (IsFoldableAtomicRMW(N0, Op) || | |||
52249 | (Commute && IsFoldableAtomicRMW(N1, Op))) | |||
52250 | return false; | |||
52251 | } | |||
52252 | } | |||
52253 | ||||
52254 | PVT = MVT::i32; | |||
52255 | return true; | |||
52256 | } | |||
52257 | ||||
52258 | //===----------------------------------------------------------------------===// | |||
52259 | // X86 Inline Assembly Support | |||
52260 | //===----------------------------------------------------------------------===// | |||
52261 | ||||
52262 | // Helper to match a string separated by whitespace. | |||
52263 | static bool matchAsm(StringRef S, ArrayRef<const char *> Pieces) { | |||
52264 | S = S.substr(S.find_first_not_of(" \t")); // Skip leading whitespace. | |||
52265 | ||||
52266 | for (StringRef Piece : Pieces) { | |||
52267 | if (!S.startswith(Piece)) // Check if the piece matches. | |||
52268 | return false; | |||
52269 | ||||
52270 | S = S.substr(Piece.size()); | |||
52271 | StringRef::size_type Pos = S.find_first_not_of(" \t"); | |||
52272 | if (Pos == 0) // We matched a prefix. | |||
52273 | return false; | |||
52274 | ||||
52275 | S = S.substr(Pos); | |||
52276 | } | |||
52277 | ||||
52278 | return S.empty(); | |||
52279 | } | |||
52280 | ||||
52281 | static bool clobbersFlagRegisters(const SmallVector<StringRef, 4> &AsmPieces) { | |||
52282 | ||||
52283 | if (AsmPieces.size() == 3 || AsmPieces.size() == 4) { | |||
52284 | if (std::count(AsmPieces.begin(), AsmPieces.end(), "~{cc}") && | |||
52285 | std::count(AsmPieces.begin(), AsmPieces.end(), "~{flags}") && | |||
52286 | std::count(AsmPieces.begin(), AsmPieces.end(), "~{fpsr}")) { | |||
52287 | ||||
52288 | if (AsmPieces.size() == 3) | |||
52289 | return true; | |||
52290 | else if (std::count(AsmPieces.begin(), AsmPieces.end(), "~{dirflag}")) | |||
52291 | return true; | |||
52292 | } | |||
52293 | } | |||
52294 | return false; | |||
52295 | } | |||
52296 | ||||
52297 | bool X86TargetLowering::ExpandInlineAsm(CallInst *CI) const { | |||
52298 | InlineAsm *IA = cast<InlineAsm>(CI->getCalledOperand()); | |||
52299 | ||||
52300 | const std::string &AsmStr = IA->getAsmString(); | |||
52301 | ||||
52302 | IntegerType *Ty = dyn_cast<IntegerType>(CI->getType()); | |||
52303 | if (!Ty || Ty->getBitWidth() % 16 != 0) | |||
52304 | return false; | |||
52305 | ||||
52306 | // TODO: should remove alternatives from the asmstring: "foo {a|b}" -> "foo a" | |||
52307 | SmallVector<StringRef, 4> AsmPieces; | |||
52308 | SplitString(AsmStr, AsmPieces, ";\n"); | |||
52309 | ||||
52310 | switch (AsmPieces.size()) { | |||
52311 | default: return false; | |||
52312 | case 1: | |||
52313 | // FIXME: this should verify that we are targeting a 486 or better. If not, | |||
52314 | // we will turn this bswap into something that will be lowered to logical | |||
52315 | // ops instead of emitting the bswap asm. For now, we don't support 486 or | |||
52316 | // lower so don't worry about this. | |||
52317 | // bswap $0 | |||
52318 | if (matchAsm(AsmPieces[0], {"bswap", "$0"}) || | |||
52319 | matchAsm(AsmPieces[0], {"bswapl", "$0"}) || | |||
52320 | matchAsm(AsmPieces[0], {"bswapq", "$0"}) || | |||
52321 | matchAsm(AsmPieces[0], {"bswap", "${0:q}"}) || | |||
52322 | matchAsm(AsmPieces[0], {"bswapl", "${0:q}"}) || | |||
52323 | matchAsm(AsmPieces[0], {"bswapq", "${0:q}"})) { | |||
52324 | // No need to check constraints, nothing other than the equivalent of | |||
52325 | // "=r,0" would be valid here. | |||
52326 | return IntrinsicLowering::LowerToByteSwap(CI); | |||
52327 | } | |||
52328 | ||||
52329 | // rorw $$8, ${0:w} --> llvm.bswap.i16 | |||
52330 | if (CI->getType()->isIntegerTy(16) && | |||
52331 | IA->getConstraintString().compare(0, 5, "=r,0,") == 0 && | |||
52332 | (matchAsm(AsmPieces[0], {"rorw", "$$8,", "${0:w}"}) || | |||
52333 | matchAsm(AsmPieces[0], {"rolw", "$$8,", "${0:w}"}))) { | |||
52334 | AsmPieces.clear(); | |||
52335 | StringRef ConstraintsStr = IA->getConstraintString(); | |||
52336 | SplitString(StringRef(ConstraintsStr).substr(5), AsmPieces, ","); | |||
52337 | array_pod_sort(AsmPieces.begin(), AsmPieces.end()); | |||
52338 | if (clobbersFlagRegisters(AsmPieces)) | |||
52339 | return IntrinsicLowering::LowerToByteSwap(CI); | |||
52340 | } | |||
52341 | break; | |||
52342 | case 3: | |||
52343 | if (CI->getType()->isIntegerTy(32) && | |||
52344 | IA->getConstraintString().compare(0, 5, "=r,0,") == 0 && | |||
52345 | matchAsm(AsmPieces[0], {"rorw", "$$8,", "${0:w}"}) && | |||
52346 | matchAsm(AsmPieces[1], {"rorl", "$$16,", "$0"}) && | |||
52347 | matchAsm(AsmPieces[2], {"rorw", "$$8,", "${0:w}"})) { | |||
52348 | AsmPieces.clear(); | |||
52349 | StringRef ConstraintsStr = IA->getConstraintString(); | |||
52350 | SplitString(StringRef(ConstraintsStr).substr(5), AsmPieces, ","); | |||
52351 | array_pod_sort(AsmPieces.begin(), AsmPieces.end()); | |||
52352 | if (clobbersFlagRegisters(AsmPieces)) | |||
52353 | return IntrinsicLowering::LowerToByteSwap(CI); | |||
52354 | } | |||
52355 | ||||
52356 | if (CI->getType()->isIntegerTy(64)) { | |||
52357 | InlineAsm::ConstraintInfoVector Constraints = IA->ParseConstraints(); | |||
52358 | if (Constraints.size() >= 2 && | |||
52359 | Constraints[0].Codes.size() == 1 && Constraints[0].Codes[0] == "A" && | |||
52360 | Constraints[1].Codes.size() == 1 && Constraints[1].Codes[0] == "0") { | |||
52361 | // bswap %eax / bswap %edx / xchgl %eax, %edx -> llvm.bswap.i64 | |||
52362 | if (matchAsm(AsmPieces[0], {"bswap", "%eax"}) && | |||
52363 | matchAsm(AsmPieces[1], {"bswap", "%edx"}) && | |||
52364 | matchAsm(AsmPieces[2], {"xchgl", "%eax,", "%edx"})) | |||
52365 | return IntrinsicLowering::LowerToByteSwap(CI); | |||
52366 | } | |||
52367 | } | |||
52368 | break; | |||
52369 | } | |||
52370 | return false; | |||
52371 | } | |||
52372 | ||||
52373 | static X86::CondCode parseConstraintCode(llvm::StringRef Constraint) { | |||
52374 | X86::CondCode Cond = StringSwitch<X86::CondCode>(Constraint) | |||
52375 | .Case("{@cca}", X86::COND_A) | |||
52376 | .Case("{@ccae}", X86::COND_AE) | |||
52377 | .Case("{@ccb}", X86::COND_B) | |||
52378 | .Case("{@ccbe}", X86::COND_BE) | |||
52379 | .Case("{@ccc}", X86::COND_B) | |||
52380 | .Case("{@cce}", X86::COND_E) | |||
52381 | .Case("{@ccz}", X86::COND_E) | |||
52382 | .Case("{@ccg}", X86::COND_G) | |||
52383 | .Case("{@ccge}", X86::COND_GE) | |||
52384 | .Case("{@ccl}", X86::COND_L) | |||
52385 | .Case("{@ccle}", X86::COND_LE) | |||
52386 | .Case("{@ccna}", X86::COND_BE) | |||
52387 | .Case("{@ccnae}", X86::COND_B) | |||
52388 | .Case("{@ccnb}", X86::COND_AE) | |||
52389 | .Case("{@ccnbe}", X86::COND_A) | |||
52390 | .Case("{@ccnc}", X86::COND_AE) | |||
52391 | .Case("{@ccne}", X86::COND_NE) | |||
52392 | .Case("{@ccnz}", X86::COND_NE) | |||
52393 | .Case("{@ccng}", X86::COND_LE) | |||
52394 | .Case("{@ccnge}", X86::COND_L) | |||
52395 | .Case("{@ccnl}", X86::COND_GE) | |||
52396 | .Case("{@ccnle}", X86::COND_G) | |||
52397 | .Case("{@ccno}", X86::COND_NO) | |||
52398 | .Case("{@ccnp}", X86::COND_NP) | |||
52399 | .Case("{@ccns}", X86::COND_NS) | |||
52400 | .Case("{@cco}", X86::COND_O) | |||
52401 | .Case("{@ccp}", X86::COND_P) | |||
52402 | .Case("{@ccs}", X86::COND_S) | |||
52403 | .Default(X86::COND_INVALID); | |||
52404 | return Cond; | |||
52405 | } | |||
52406 | ||||
52407 | /// Given a constraint letter, return the type of constraint for this target. | |||
52408 | X86TargetLowering::ConstraintType | |||
52409 | X86TargetLowering::getConstraintType(StringRef Constraint) const { | |||
52410 | if (Constraint.size() == 1) { | |||
52411 | switch (Constraint[0]) { | |||
52412 | case 'R': | |||
52413 | case 'q': | |||
52414 | case 'Q': | |||
52415 | case 'f': | |||
52416 | case 't': | |||
52417 | case 'u': | |||
52418 | case 'y': | |||
52419 | case 'x': | |||
52420 | case 'v': | |||
52421 | case 'l': | |||
52422 | case 'k': // AVX512 masking registers. | |||
52423 | return C_RegisterClass; | |||
52424 | case 'a': | |||
52425 | case 'b': | |||
52426 | case 'c': | |||
52427 | case 'd': | |||
52428 | case 'S': | |||
52429 | case 'D': | |||
52430 | case 'A': | |||
52431 | return C_Register; | |||
52432 | case 'I': | |||
52433 | case 'J': | |||
52434 | case 'K': | |||
52435 | case 'N': | |||
52436 | case 'G': | |||
52437 | case 'L': | |||
52438 | case 'M': | |||
52439 | return C_Immediate; | |||
52440 | case 'C': | |||
52441 | case 'e': | |||
52442 | case 'Z': | |||
52443 | return C_Other; | |||
52444 | default: | |||
52445 | break; | |||
52446 | } | |||
52447 | } | |||
52448 | else if (Constraint.size() == 2) { | |||
52449 | switch (Constraint[0]) { | |||
52450 | default: | |||
52451 | break; | |||
52452 | case 'Y': | |||
52453 | switch (Constraint[1]) { | |||
52454 | default: | |||
52455 | break; | |||
52456 | case 'z': | |||
52457 | return C_Register; | |||
52458 | case 'i': | |||
52459 | case 'm': | |||
52460 | case 'k': | |||
52461 | case 't': | |||
52462 | case '2': | |||
52463 | return C_RegisterClass; | |||
52464 | } | |||
52465 | } | |||
52466 | } else if (parseConstraintCode(Constraint) != X86::COND_INVALID) | |||
52467 | return C_Other; | |||
52468 | return TargetLowering::getConstraintType(Constraint); | |||
52469 | } | |||
52470 | ||||
52471 | /// Examine constraint type and operand type and determine a weight value. | |||
52472 | /// This object must already have been set up with the operand type | |||
52473 | /// and the current alternative constraint selected. | |||
52474 | TargetLowering::ConstraintWeight | |||
52475 | X86TargetLowering::getSingleConstraintMatchWeight( | |||
52476 | AsmOperandInfo &info, const char *constraint) const { | |||
52477 | ConstraintWeight weight = CW_Invalid; | |||
52478 | Value *CallOperandVal = info.CallOperandVal; | |||
52479 | // If we don't have a value, we can't do a match, | |||
52480 | // but allow it at the lowest weight. | |||
52481 | if (!CallOperandVal) | |||
52482 | return CW_Default; | |||
52483 | Type *type = CallOperandVal->getType(); | |||
52484 | // Look at the constraint type. | |||
52485 | switch (*constraint) { | |||
52486 | default: | |||
52487 | weight = TargetLowering::getSingleConstraintMatchWeight(info, constraint); | |||
52488 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
52489 | case 'R': | |||
52490 | case 'q': | |||
52491 | case 'Q': | |||
52492 | case 'a': | |||
52493 | case 'b': | |||
52494 | case 'c': | |||
52495 | case 'd': | |||
52496 | case 'S': | |||
52497 | case 'D': | |||
52498 | case 'A': | |||
52499 | if (CallOperandVal->getType()->isIntegerTy()) | |||
52500 | weight = CW_SpecificReg; | |||
52501 | break; | |||
52502 | case 'f': | |||
52503 | case 't': | |||
52504 | case 'u': | |||
52505 | if (type->isFloatingPointTy()) | |||
52506 | weight = CW_SpecificReg; | |||
52507 | break; | |||
52508 | case 'y': | |||
52509 | if (type->isX86_MMXTy() && Subtarget.hasMMX()) | |||
52510 | weight = CW_SpecificReg; | |||
52511 | break; | |||
52512 | case 'Y': | |||
52513 | if (StringRef(constraint).size() != 2) | |||
52514 | break; | |||
52515 | switch (constraint[1]) { | |||
52516 | default: | |||
52517 | return CW_Invalid; | |||
52518 | // XMM0 | |||
52519 | case 'z': | |||
52520 | if (((type->getPrimitiveSizeInBits() == 128) && Subtarget.hasSSE1()) || | |||
52521 | ((type->getPrimitiveSizeInBits() == 256) && Subtarget.hasAVX()) || | |||
52522 | ((type->getPrimitiveSizeInBits() == 512) && Subtarget.hasAVX512())) | |||
52523 | return CW_SpecificReg; | |||
52524 | return CW_Invalid; | |||
52525 | // Conditional OpMask regs (AVX512) | |||
52526 | case 'k': | |||
52527 | if ((type->getPrimitiveSizeInBits() == 64) && Subtarget.hasAVX512()) | |||
52528 | return CW_Register; | |||
52529 | return CW_Invalid; | |||
52530 | // Any MMX reg | |||
52531 | case 'm': | |||
52532 | if (type->isX86_MMXTy() && Subtarget.hasMMX()) | |||
52533 | return weight; | |||
52534 | return CW_Invalid; | |||
52535 | // Any SSE reg when ISA >= SSE2, same as 'x' | |||
52536 | case 'i': | |||
52537 | case 't': | |||
52538 | case '2': | |||
52539 | if (!Subtarget.hasSSE2()) | |||
52540 | return CW_Invalid; | |||
52541 | break; | |||
52542 | } | |||
52543 | break; | |||
52544 | case 'v': | |||
52545 | if ((type->getPrimitiveSizeInBits() == 512) && Subtarget.hasAVX512()) | |||
52546 | weight = CW_Register; | |||
52547 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
52548 | case 'x': | |||
52549 | if (((type->getPrimitiveSizeInBits() == 128) && Subtarget.hasSSE1()) || | |||
52550 | ((type->getPrimitiveSizeInBits() == 256) && Subtarget.hasAVX())) | |||
52551 | weight = CW_Register; | |||
52552 | break; | |||
52553 | case 'k': | |||
52554 | // Enable conditional vector operations using %k<#> registers. | |||
52555 | if ((type->getPrimitiveSizeInBits() == 64) && Subtarget.hasAVX512()) | |||
52556 | weight = CW_Register; | |||
52557 | break; | |||
52558 | case 'I': | |||
52559 | if (ConstantInt *C = dyn_cast<ConstantInt>(info.CallOperandVal)) { | |||
52560 | if (C->getZExtValue() <= 31) | |||
52561 | weight = CW_Constant; | |||
52562 | } | |||
52563 | break; | |||
52564 | case 'J': | |||
52565 | if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) { | |||
52566 | if (C->getZExtValue() <= 63) | |||
52567 | weight = CW_Constant; | |||
52568 | } | |||
52569 | break; | |||
52570 | case 'K': | |||
52571 | if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) { | |||
52572 | if ((C->getSExtValue() >= -0x80) && (C->getSExtValue() <= 0x7f)) | |||
52573 | weight = CW_Constant; | |||
52574 | } | |||
52575 | break; | |||
52576 | case 'L': | |||
52577 | if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) { | |||
52578 | if ((C->getZExtValue() == 0xff) || (C->getZExtValue() == 0xffff)) | |||
52579 | weight = CW_Constant; | |||
52580 | } | |||
52581 | break; | |||
52582 | case 'M': | |||
52583 | if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) { | |||
52584 | if (C->getZExtValue() <= 3) | |||
52585 | weight = CW_Constant; | |||
52586 | } | |||
52587 | break; | |||
52588 | case 'N': | |||
52589 | if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) { | |||
52590 | if (C->getZExtValue() <= 0xff) | |||
52591 | weight = CW_Constant; | |||
52592 | } | |||
52593 | break; | |||
52594 | case 'G': | |||
52595 | case 'C': | |||
52596 | if (isa<ConstantFP>(CallOperandVal)) { | |||
52597 | weight = CW_Constant; | |||
52598 | } | |||
52599 | break; | |||
52600 | case 'e': | |||
52601 | if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) { | |||
52602 | if ((C->getSExtValue() >= -0x80000000LL) && | |||
52603 | (C->getSExtValue() <= 0x7fffffffLL)) | |||
52604 | weight = CW_Constant; | |||
52605 | } | |||
52606 | break; | |||
52607 | case 'Z': | |||
52608 | if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) { | |||
52609 | if (C->getZExtValue() <= 0xffffffff) | |||
52610 | weight = CW_Constant; | |||
52611 | } | |||
52612 | break; | |||
52613 | } | |||
52614 | return weight; | |||
52615 | } | |||
52616 | ||||
52617 | /// Try to replace an X constraint, which matches anything, with another that | |||
52618 | /// has more specific requirements based on the type of the corresponding | |||
52619 | /// operand. | |||
52620 | const char *X86TargetLowering:: | |||
52621 | LowerXConstraint(EVT ConstraintVT) const { | |||
52622 | // FP X constraints get lowered to SSE1/2 registers if available, otherwise | |||
52623 | // 'f' like normal targets. | |||
52624 | if (ConstraintVT.isFloatingPoint()) { | |||
52625 | if (Subtarget.hasSSE1()) | |||
52626 | return "x"; | |||
52627 | } | |||
52628 | ||||
52629 | return TargetLowering::LowerXConstraint(ConstraintVT); | |||
52630 | } | |||
52631 | ||||
52632 | // Lower @cc targets via setcc. | |||
52633 | SDValue X86TargetLowering::LowerAsmOutputForConstraint( | |||
52634 | SDValue &Chain, SDValue &Flag, const SDLoc &DL, | |||
52635 | const AsmOperandInfo &OpInfo, SelectionDAG &DAG) const { | |||
52636 | X86::CondCode Cond = parseConstraintCode(OpInfo.ConstraintCode); | |||
52637 | if (Cond == X86::COND_INVALID) | |||
52638 | return SDValue(); | |||
52639 | // Check that return type is valid. | |||
52640 | if (OpInfo.ConstraintVT.isVector() || !OpInfo.ConstraintVT.isInteger() || | |||
52641 | OpInfo.ConstraintVT.getSizeInBits() < 8) | |||
52642 | report_fatal_error("Flag output operand is of invalid type"); | |||
52643 | ||||
52644 | // Get EFLAGS register. Only update chain when copyfrom is glued. | |||
52645 | if (Flag.getNode()) { | |||
52646 | Flag = DAG.getCopyFromReg(Chain, DL, X86::EFLAGS, MVT::i32, Flag); | |||
52647 | Chain = Flag.getValue(1); | |||
52648 | } else | |||
52649 | Flag = DAG.getCopyFromReg(Chain, DL, X86::EFLAGS, MVT::i32); | |||
52650 | // Extract CC code. | |||
52651 | SDValue CC = getSETCC(Cond, Flag, DL, DAG); | |||
52652 | // Extend to 32-bits | |||
52653 | SDValue Result = DAG.getNode(ISD::ZERO_EXTEND, DL, OpInfo.ConstraintVT, CC); | |||
52654 | ||||
52655 | return Result; | |||
52656 | } | |||
52657 | ||||
52658 | /// Lower the specified operand into the Ops vector. | |||
52659 | /// If it is invalid, don't add anything to Ops. | |||
52660 | void X86TargetLowering::LowerAsmOperandForConstraint(SDValue Op, | |||
52661 | std::string &Constraint, | |||
52662 | std::vector<SDValue>&Ops, | |||
52663 | SelectionDAG &DAG) const { | |||
52664 | SDValue Result; | |||
52665 | ||||
52666 | // Only support length 1 constraints for now. | |||
52667 | if (Constraint.length() > 1) return; | |||
52668 | ||||
52669 | char ConstraintLetter = Constraint[0]; | |||
52670 | switch (ConstraintLetter) { | |||
52671 | default: break; | |||
52672 | case 'I': | |||
52673 | if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) { | |||
52674 | if (C->getZExtValue() <= 31) { | |||
52675 | Result = DAG.getTargetConstant(C->getZExtValue(), SDLoc(Op), | |||
52676 | Op.getValueType()); | |||
52677 | break; | |||
52678 | } | |||
52679 | } | |||
52680 | return; | |||
52681 | case 'J': | |||
52682 | if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) { | |||
52683 | if (C->getZExtValue() <= 63) { | |||
52684 | Result = DAG.getTargetConstant(C->getZExtValue(), SDLoc(Op), | |||
52685 | Op.getValueType()); | |||
52686 | break; | |||
52687 | } | |||
52688 | } | |||
52689 | return; | |||
52690 | case 'K': | |||
52691 | if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) { | |||
52692 | if (isInt<8>(C->getSExtValue())) { | |||
52693 | Result = DAG.getTargetConstant(C->getZExtValue(), SDLoc(Op), | |||
52694 | Op.getValueType()); | |||
52695 | break; | |||
52696 | } | |||
52697 | } | |||
52698 | return; | |||
52699 | case 'L': | |||
52700 | if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) { | |||
52701 | if (C->getZExtValue() == 0xff || C->getZExtValue() == 0xffff || | |||
52702 | (Subtarget.is64Bit() && C->getZExtValue() == 0xffffffff)) { | |||
52703 | Result = DAG.getTargetConstant(C->getSExtValue(), SDLoc(Op), | |||
52704 | Op.getValueType()); | |||
52705 | break; | |||
52706 | } | |||
52707 | } | |||
52708 | return; | |||
52709 | case 'M': | |||
52710 | if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) { | |||
52711 | if (C->getZExtValue() <= 3) { | |||
52712 | Result = DAG.getTargetConstant(C->getZExtValue(), SDLoc(Op), | |||
52713 | Op.getValueType()); | |||
52714 | break; | |||
52715 | } | |||
52716 | } | |||
52717 | return; | |||
52718 | case 'N': | |||
52719 | if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) { | |||
52720 | if (C->getZExtValue() <= 255) { | |||
52721 | Result = DAG.getTargetConstant(C->getZExtValue(), SDLoc(Op), | |||
52722 | Op.getValueType()); | |||
52723 | break; | |||
52724 | } | |||
52725 | } | |||
52726 | return; | |||
52727 | case 'O': | |||
52728 | if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) { | |||
52729 | if (C->getZExtValue() <= 127) { | |||
52730 | Result = DAG.getTargetConstant(C->getZExtValue(), SDLoc(Op), | |||
52731 | Op.getValueType()); | |||
52732 | break; | |||
52733 | } | |||
52734 | } | |||
52735 | return; | |||
52736 | case 'e': { | |||
52737 | // 32-bit signed value | |||
52738 | if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) { | |||
52739 | if (ConstantInt::isValueValidForType(Type::getInt32Ty(*DAG.getContext()), | |||
52740 | C->getSExtValue())) { | |||
52741 | // Widen to 64 bits here to get it sign extended. | |||
52742 | Result = DAG.getTargetConstant(C->getSExtValue(), SDLoc(Op), MVT::i64); | |||
52743 | break; | |||
52744 | } | |||
52745 | // FIXME gcc accepts some relocatable values here too, but only in certain | |||
52746 | // memory models; it's complicated. | |||
52747 | } | |||
52748 | return; | |||
52749 | } | |||
52750 | case 'Z': { | |||
52751 | // 32-bit unsigned value | |||
52752 | if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) { | |||
52753 | if (ConstantInt::isValueValidForType(Type::getInt32Ty(*DAG.getContext()), | |||
52754 | C->getZExtValue())) { | |||
52755 | Result = DAG.getTargetConstant(C->getZExtValue(), SDLoc(Op), | |||
52756 | Op.getValueType()); | |||
52757 | break; | |||
52758 | } | |||
52759 | } | |||
52760 | // FIXME gcc accepts some relocatable values here too, but only in certain | |||
52761 | // memory models; it's complicated. | |||
52762 | return; | |||
52763 | } | |||
52764 | case 'i': { | |||
52765 | // Literal immediates are always ok. | |||
52766 | if (ConstantSDNode *CST = dyn_cast<ConstantSDNode>(Op)) { | |||
52767 | bool IsBool = CST->getConstantIntValue()->getBitWidth() == 1; | |||
52768 | BooleanContent BCont = getBooleanContents(MVT::i64); | |||
52769 | ISD::NodeType ExtOpc = IsBool ? getExtendForContent(BCont) | |||
52770 | : ISD::SIGN_EXTEND; | |||
52771 | int64_t ExtVal = ExtOpc == ISD::ZERO_EXTEND ? CST->getZExtValue() | |||
52772 | : CST->getSExtValue(); | |||
52773 | Result = DAG.getTargetConstant(ExtVal, SDLoc(Op), MVT::i64); | |||
52774 | break; | |||
52775 | } | |||
52776 | ||||
52777 | // In any sort of PIC mode addresses need to be computed at runtime by | |||
52778 | // adding in a register or some sort of table lookup. These can't | |||
52779 | // be used as immediates. | |||
52780 | if (Subtarget.isPICStyleGOT() || Subtarget.isPICStyleStubPIC()) | |||
52781 | return; | |||
52782 | ||||
52783 | // If we are in non-pic codegen mode, we allow the address of a global (with | |||
52784 | // an optional displacement) to be used with 'i'. | |||
52785 | if (auto *GA = dyn_cast<GlobalAddressSDNode>(Op)) | |||
52786 | // If we require an extra load to get this address, as in PIC mode, we | |||
52787 | // can't accept it. | |||
52788 | if (isGlobalStubReference( | |||
52789 | Subtarget.classifyGlobalReference(GA->getGlobal()))) | |||
52790 | return; | |||
52791 | break; | |||
52792 | } | |||
52793 | } | |||
52794 | ||||
52795 | if (Result.getNode()) { | |||
52796 | Ops.push_back(Result); | |||
52797 | return; | |||
52798 | } | |||
52799 | return TargetLowering::LowerAsmOperandForConstraint(Op, Constraint, Ops, DAG); | |||
52800 | } | |||
52801 | ||||
52802 | /// Check if \p RC is a general purpose register class. | |||
52803 | /// I.e., GR* or one of their variant. | |||
52804 | static bool isGRClass(const TargetRegisterClass &RC) { | |||
52805 | return RC.hasSuperClassEq(&X86::GR8RegClass) || | |||
52806 | RC.hasSuperClassEq(&X86::GR16RegClass) || | |||
52807 | RC.hasSuperClassEq(&X86::GR32RegClass) || | |||
52808 | RC.hasSuperClassEq(&X86::GR64RegClass) || | |||
52809 | RC.hasSuperClassEq(&X86::LOW32_ADDR_ACCESS_RBPRegClass); | |||
52810 | } | |||
52811 | ||||
52812 | /// Check if \p RC is a vector register class. | |||
52813 | /// I.e., FR* / VR* or one of their variant. | |||
52814 | static bool isFRClass(const TargetRegisterClass &RC) { | |||
52815 | return RC.hasSuperClassEq(&X86::FR16XRegClass) || | |||
52816 | RC.hasSuperClassEq(&X86::FR32XRegClass) || | |||
52817 | RC.hasSuperClassEq(&X86::FR64XRegClass) || | |||
52818 | RC.hasSuperClassEq(&X86::VR128XRegClass) || | |||
52819 | RC.hasSuperClassEq(&X86::VR256XRegClass) || | |||
52820 | RC.hasSuperClassEq(&X86::VR512RegClass); | |||
52821 | } | |||
52822 | ||||
52823 | /// Check if \p RC is a mask register class. | |||
52824 | /// I.e., VK* or one of their variant. | |||
52825 | static bool isVKClass(const TargetRegisterClass &RC) { | |||
52826 | return RC.hasSuperClassEq(&X86::VK1RegClass) || | |||
52827 | RC.hasSuperClassEq(&X86::VK2RegClass) || | |||
52828 | RC.hasSuperClassEq(&X86::VK4RegClass) || | |||
52829 | RC.hasSuperClassEq(&X86::VK8RegClass) || | |||
52830 | RC.hasSuperClassEq(&X86::VK16RegClass) || | |||
52831 | RC.hasSuperClassEq(&X86::VK32RegClass) || | |||
52832 | RC.hasSuperClassEq(&X86::VK64RegClass); | |||
52833 | } | |||
52834 | ||||
52835 | std::pair<unsigned, const TargetRegisterClass *> | |||
52836 | X86TargetLowering::getRegForInlineAsmConstraint(const TargetRegisterInfo *TRI, | |||
52837 | StringRef Constraint, | |||
52838 | MVT VT) const { | |||
52839 | // First, see if this is a constraint that directly corresponds to an LLVM | |||
52840 | // register class. | |||
52841 | if (Constraint.size() == 1) { | |||
52842 | // GCC Constraint Letters | |||
52843 | switch (Constraint[0]) { | |||
52844 | default: break; | |||
52845 | // 'A' means [ER]AX + [ER]DX. | |||
52846 | case 'A': | |||
52847 | if (Subtarget.is64Bit()) | |||
52848 | return std::make_pair(X86::RAX, &X86::GR64_ADRegClass); | |||
52849 | assert((Subtarget.is32Bit() || Subtarget.is16Bit()) &&(static_cast <bool> ((Subtarget.is32Bit() || Subtarget. is16Bit()) && "Expecting 64, 32 or 16 bit subtarget") ? void (0) : __assert_fail ("(Subtarget.is32Bit() || Subtarget.is16Bit()) && \"Expecting 64, 32 or 16 bit subtarget\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 52850, __extension__ __PRETTY_FUNCTION__)) | |||
52850 | "Expecting 64, 32 or 16 bit subtarget")(static_cast <bool> ((Subtarget.is32Bit() || Subtarget. is16Bit()) && "Expecting 64, 32 or 16 bit subtarget") ? void (0) : __assert_fail ("(Subtarget.is32Bit() || Subtarget.is16Bit()) && \"Expecting 64, 32 or 16 bit subtarget\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 52850, __extension__ __PRETTY_FUNCTION__)); | |||
52851 | return std::make_pair(X86::EAX, &X86::GR32_ADRegClass); | |||
52852 | ||||
52853 | // TODO: Slight differences here in allocation order and leaving | |||
52854 | // RIP in the class. Do they matter any more here than they do | |||
52855 | // in the normal allocation? | |||
52856 | case 'k': | |||
52857 | if (Subtarget.hasAVX512()) { | |||
52858 | if (VT == MVT::i1) | |||
52859 | return std::make_pair(0U, &X86::VK1RegClass); | |||
52860 | if (VT == MVT::i8) | |||
52861 | return std::make_pair(0U, &X86::VK8RegClass); | |||
52862 | if (VT == MVT::i16) | |||
52863 | return std::make_pair(0U, &X86::VK16RegClass); | |||
52864 | } | |||
52865 | if (Subtarget.hasBWI()) { | |||
52866 | if (VT == MVT::i32) | |||
52867 | return std::make_pair(0U, &X86::VK32RegClass); | |||
52868 | if (VT == MVT::i64) | |||
52869 | return std::make_pair(0U, &X86::VK64RegClass); | |||
52870 | } | |||
52871 | break; | |||
52872 | case 'q': // GENERAL_REGS in 64-bit mode, Q_REGS in 32-bit mode. | |||
52873 | if (Subtarget.is64Bit()) { | |||
52874 | if (VT == MVT::i8 || VT == MVT::i1) | |||
52875 | return std::make_pair(0U, &X86::GR8RegClass); | |||
52876 | if (VT == MVT::i16) | |||
52877 | return std::make_pair(0U, &X86::GR16RegClass); | |||
52878 | if (VT == MVT::i32 || VT == MVT::f32) | |||
52879 | return std::make_pair(0U, &X86::GR32RegClass); | |||
52880 | if (VT != MVT::f80 && !VT.isVector()) | |||
52881 | return std::make_pair(0U, &X86::GR64RegClass); | |||
52882 | break; | |||
52883 | } | |||
52884 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
52885 | // 32-bit fallthrough | |||
52886 | case 'Q': // Q_REGS | |||
52887 | if (VT == MVT::i8 || VT == MVT::i1) | |||
52888 | return std::make_pair(0U, &X86::GR8_ABCD_LRegClass); | |||
52889 | if (VT == MVT::i16) | |||
52890 | return std::make_pair(0U, &X86::GR16_ABCDRegClass); | |||
52891 | if (VT == MVT::i32 || VT == MVT::f32 || | |||
52892 | (!VT.isVector() && !Subtarget.is64Bit())) | |||
52893 | return std::make_pair(0U, &X86::GR32_ABCDRegClass); | |||
52894 | if (VT != MVT::f80 && !VT.isVector()) | |||
52895 | return std::make_pair(0U, &X86::GR64_ABCDRegClass); | |||
52896 | break; | |||
52897 | case 'r': // GENERAL_REGS | |||
52898 | case 'l': // INDEX_REGS | |||
52899 | if (VT == MVT::i8 || VT == MVT::i1) | |||
52900 | return std::make_pair(0U, &X86::GR8RegClass); | |||
52901 | if (VT == MVT::i16) | |||
52902 | return std::make_pair(0U, &X86::GR16RegClass); | |||
52903 | if (VT == MVT::i32 || VT == MVT::f32 || | |||
52904 | (!VT.isVector() && !Subtarget.is64Bit())) | |||
52905 | return std::make_pair(0U, &X86::GR32RegClass); | |||
52906 | if (VT != MVT::f80 && !VT.isVector()) | |||
52907 | return std::make_pair(0U, &X86::GR64RegClass); | |||
52908 | break; | |||
52909 | case 'R': // LEGACY_REGS | |||
52910 | if (VT == MVT::i8 || VT == MVT::i1) | |||
52911 | return std::make_pair(0U, &X86::GR8_NOREXRegClass); | |||
52912 | if (VT == MVT::i16) | |||
52913 | return std::make_pair(0U, &X86::GR16_NOREXRegClass); | |||
52914 | if (VT == MVT::i32 || VT == MVT::f32 || | |||
52915 | (!VT.isVector() && !Subtarget.is64Bit())) | |||
52916 | return std::make_pair(0U, &X86::GR32_NOREXRegClass); | |||
52917 | if (VT != MVT::f80 && !VT.isVector()) | |||
52918 | return std::make_pair(0U, &X86::GR64_NOREXRegClass); | |||
52919 | break; | |||
52920 | case 'f': // FP Stack registers. | |||
52921 | // If SSE is enabled for this VT, use f80 to ensure the isel moves the | |||
52922 | // value to the correct fpstack register class. | |||
52923 | if (VT == MVT::f32 && !isScalarFPTypeInSSEReg(VT)) | |||
52924 | return std::make_pair(0U, &X86::RFP32RegClass); | |||
52925 | if (VT == MVT::f64 && !isScalarFPTypeInSSEReg(VT)) | |||
52926 | return std::make_pair(0U, &X86::RFP64RegClass); | |||
52927 | if (VT == MVT::f32 || VT == MVT::f64 || VT == MVT::f80) | |||
52928 | return std::make_pair(0U, &X86::RFP80RegClass); | |||
52929 | break; | |||
52930 | case 'y': // MMX_REGS if MMX allowed. | |||
52931 | if (!Subtarget.hasMMX()) break; | |||
52932 | return std::make_pair(0U, &X86::VR64RegClass); | |||
52933 | case 'v': | |||
52934 | case 'x': // SSE_REGS if SSE1 allowed or AVX_REGS if AVX allowed | |||
52935 | if (!Subtarget.hasSSE1()) break; | |||
52936 | bool VConstraint = (Constraint[0] == 'v'); | |||
52937 | ||||
52938 | switch (VT.SimpleTy) { | |||
52939 | default: break; | |||
52940 | // Scalar SSE types. | |||
52941 | case MVT::f32: | |||
52942 | case MVT::i32: | |||
52943 | if (VConstraint && Subtarget.hasVLX()) | |||
52944 | return std::make_pair(0U, &X86::FR32XRegClass); | |||
52945 | return std::make_pair(0U, &X86::FR32RegClass); | |||
52946 | case MVT::f64: | |||
52947 | case MVT::i64: | |||
52948 | if (VConstraint && Subtarget.hasVLX()) | |||
52949 | return std::make_pair(0U, &X86::FR64XRegClass); | |||
52950 | return std::make_pair(0U, &X86::FR64RegClass); | |||
52951 | case MVT::i128: | |||
52952 | if (Subtarget.is64Bit()) { | |||
52953 | if (VConstraint && Subtarget.hasVLX()) | |||
52954 | return std::make_pair(0U, &X86::VR128XRegClass); | |||
52955 | return std::make_pair(0U, &X86::VR128RegClass); | |||
52956 | } | |||
52957 | break; | |||
52958 | // Vector types and fp128. | |||
52959 | case MVT::f128: | |||
52960 | case MVT::v16i8: | |||
52961 | case MVT::v8i16: | |||
52962 | case MVT::v4i32: | |||
52963 | case MVT::v2i64: | |||
52964 | case MVT::v4f32: | |||
52965 | case MVT::v2f64: | |||
52966 | if (VConstraint && Subtarget.hasVLX()) | |||
52967 | return std::make_pair(0U, &X86::VR128XRegClass); | |||
52968 | return std::make_pair(0U, &X86::VR128RegClass); | |||
52969 | // AVX types. | |||
52970 | case MVT::v32i8: | |||
52971 | case MVT::v16i16: | |||
52972 | case MVT::v8i32: | |||
52973 | case MVT::v4i64: | |||
52974 | case MVT::v8f32: | |||
52975 | case MVT::v4f64: | |||
52976 | if (VConstraint && Subtarget.hasVLX()) | |||
52977 | return std::make_pair(0U, &X86::VR256XRegClass); | |||
52978 | if (Subtarget.hasAVX()) | |||
52979 | return std::make_pair(0U, &X86::VR256RegClass); | |||
52980 | break; | |||
52981 | case MVT::v64i8: | |||
52982 | case MVT::v32i16: | |||
52983 | case MVT::v8f64: | |||
52984 | case MVT::v16f32: | |||
52985 | case MVT::v16i32: | |||
52986 | case MVT::v8i64: | |||
52987 | if (!Subtarget.hasAVX512()) break; | |||
52988 | if (VConstraint) | |||
52989 | return std::make_pair(0U, &X86::VR512RegClass); | |||
52990 | return std::make_pair(0U, &X86::VR512_0_15RegClass); | |||
52991 | } | |||
52992 | break; | |||
52993 | } | |||
52994 | } else if (Constraint.size() == 2 && Constraint[0] == 'Y') { | |||
52995 | switch (Constraint[1]) { | |||
52996 | default: | |||
52997 | break; | |||
52998 | case 'i': | |||
52999 | case 't': | |||
53000 | case '2': | |||
53001 | return getRegForInlineAsmConstraint(TRI, "x", VT); | |||
53002 | case 'm': | |||
53003 | if (!Subtarget.hasMMX()) break; | |||
53004 | return std::make_pair(0U, &X86::VR64RegClass); | |||
53005 | case 'z': | |||
53006 | if (!Subtarget.hasSSE1()) break; | |||
53007 | switch (VT.SimpleTy) { | |||
53008 | default: break; | |||
53009 | // Scalar SSE types. | |||
53010 | case MVT::f32: | |||
53011 | case MVT::i32: | |||
53012 | return std::make_pair(X86::XMM0, &X86::FR32RegClass); | |||
53013 | case MVT::f64: | |||
53014 | case MVT::i64: | |||
53015 | return std::make_pair(X86::XMM0, &X86::FR64RegClass); | |||
53016 | case MVT::f128: | |||
53017 | case MVT::v16i8: | |||
53018 | case MVT::v8i16: | |||
53019 | case MVT::v4i32: | |||
53020 | case MVT::v2i64: | |||
53021 | case MVT::v4f32: | |||
53022 | case MVT::v2f64: | |||
53023 | return std::make_pair(X86::XMM0, &X86::VR128RegClass); | |||
53024 | // AVX types. | |||
53025 | case MVT::v32i8: | |||
53026 | case MVT::v16i16: | |||
53027 | case MVT::v8i32: | |||
53028 | case MVT::v4i64: | |||
53029 | case MVT::v8f32: | |||
53030 | case MVT::v4f64: | |||
53031 | if (Subtarget.hasAVX()) | |||
53032 | return std::make_pair(X86::YMM0, &X86::VR256RegClass); | |||
53033 | break; | |||
53034 | case MVT::v64i8: | |||
53035 | case MVT::v32i16: | |||
53036 | case MVT::v8f64: | |||
53037 | case MVT::v16f32: | |||
53038 | case MVT::v16i32: | |||
53039 | case MVT::v8i64: | |||
53040 | if (Subtarget.hasAVX512()) | |||
53041 | return std::make_pair(X86::ZMM0, &X86::VR512_0_15RegClass); | |||
53042 | break; | |||
53043 | } | |||
53044 | break; | |||
53045 | case 'k': | |||
53046 | // This register class doesn't allocate k0 for masked vector operation. | |||
53047 | if (Subtarget.hasAVX512()) { | |||
53048 | if (VT == MVT::i1) | |||
53049 | return std::make_pair(0U, &X86::VK1WMRegClass); | |||
53050 | if (VT == MVT::i8) | |||
53051 | return std::make_pair(0U, &X86::VK8WMRegClass); | |||
53052 | if (VT == MVT::i16) | |||
53053 | return std::make_pair(0U, &X86::VK16WMRegClass); | |||
53054 | } | |||
53055 | if (Subtarget.hasBWI()) { | |||
53056 | if (VT == MVT::i32) | |||
53057 | return std::make_pair(0U, &X86::VK32WMRegClass); | |||
53058 | if (VT == MVT::i64) | |||
53059 | return std::make_pair(0U, &X86::VK64WMRegClass); | |||
53060 | } | |||
53061 | break; | |||
53062 | } | |||
53063 | } | |||
53064 | ||||
53065 | if (parseConstraintCode(Constraint) != X86::COND_INVALID) | |||
53066 | return std::make_pair(0U, &X86::GR32RegClass); | |||
53067 | ||||
53068 | // Use the default implementation in TargetLowering to convert the register | |||
53069 | // constraint into a member of a register class. | |||
53070 | std::pair<Register, const TargetRegisterClass*> Res; | |||
53071 | Res = TargetLowering::getRegForInlineAsmConstraint(TRI, Constraint, VT); | |||
53072 | ||||
53073 | // Not found as a standard register? | |||
53074 | if (!Res.second) { | |||
53075 | // Only match x87 registers if the VT is one SelectionDAGBuilder can convert | |||
53076 | // to/from f80. | |||
53077 | if (VT == MVT::Other || VT == MVT::f32 || VT == MVT::f64 || VT == MVT::f80) { | |||
53078 | // Map st(0) -> st(7) -> ST0 | |||
53079 | if (Constraint.size() == 7 && Constraint[0] == '{' && | |||
53080 | tolower(Constraint[1]) == 's' && tolower(Constraint[2]) == 't' && | |||
53081 | Constraint[3] == '(' && | |||
53082 | (Constraint[4] >= '0' && Constraint[4] <= '7') && | |||
53083 | Constraint[5] == ')' && Constraint[6] == '}') { | |||
53084 | // st(7) is not allocatable and thus not a member of RFP80. Return | |||
53085 | // singleton class in cases where we have a reference to it. | |||
53086 | if (Constraint[4] == '7') | |||
53087 | return std::make_pair(X86::FP7, &X86::RFP80_7RegClass); | |||
53088 | return std::make_pair(X86::FP0 + Constraint[4] - '0', | |||
53089 | &X86::RFP80RegClass); | |||
53090 | } | |||
53091 | ||||
53092 | // GCC allows "st(0)" to be called just plain "st". | |||
53093 | if (StringRef("{st}").equals_insensitive(Constraint)) | |||
53094 | return std::make_pair(X86::FP0, &X86::RFP80RegClass); | |||
53095 | } | |||
53096 | ||||
53097 | // flags -> EFLAGS | |||
53098 | if (StringRef("{flags}").equals_insensitive(Constraint)) | |||
53099 | return std::make_pair(X86::EFLAGS, &X86::CCRRegClass); | |||
53100 | ||||
53101 | // dirflag -> DF | |||
53102 | // Only allow for clobber. | |||
53103 | if (StringRef("{dirflag}").equals_insensitive(Constraint) && | |||
53104 | VT == MVT::Other) | |||
53105 | return std::make_pair(X86::DF, &X86::DFCCRRegClass); | |||
53106 | ||||
53107 | // fpsr -> FPSW | |||
53108 | if (StringRef("{fpsr}").equals_insensitive(Constraint)) | |||
53109 | return std::make_pair(X86::FPSW, &X86::FPCCRRegClass); | |||
53110 | ||||
53111 | return Res; | |||
53112 | } | |||
53113 | ||||
53114 | // Make sure it isn't a register that requires 64-bit mode. | |||
53115 | if (!Subtarget.is64Bit() && | |||
53116 | (isFRClass(*Res.second) || isGRClass(*Res.second)) && | |||
53117 | TRI->getEncodingValue(Res.first) >= 8) { | |||
53118 | // Register requires REX prefix, but we're in 32-bit mode. | |||
53119 | return std::make_pair(0, nullptr); | |||
53120 | } | |||
53121 | ||||
53122 | // Make sure it isn't a register that requires AVX512. | |||
53123 | if (!Subtarget.hasAVX512() && isFRClass(*Res.second) && | |||
53124 | TRI->getEncodingValue(Res.first) & 0x10) { | |||
53125 | // Register requires EVEX prefix. | |||
53126 | return std::make_pair(0, nullptr); | |||
53127 | } | |||
53128 | ||||
53129 | // Otherwise, check to see if this is a register class of the wrong value | |||
53130 | // type. For example, we want to map "{ax},i32" -> {eax}, we don't want it to | |||
53131 | // turn into {ax},{dx}. | |||
53132 | // MVT::Other is used to specify clobber names. | |||
53133 | if (TRI->isTypeLegalForClass(*Res.second, VT) || VT == MVT::Other) | |||
53134 | return Res; // Correct type already, nothing to do. | |||
53135 | ||||
53136 | // Get a matching integer of the correct size. i.e. "ax" with MVT::32 should | |||
53137 | // return "eax". This should even work for things like getting 64bit integer | |||
53138 | // registers when given an f64 type. | |||
53139 | const TargetRegisterClass *Class = Res.second; | |||
53140 | // The generic code will match the first register class that contains the | |||
53141 | // given register. Thus, based on the ordering of the tablegened file, | |||
53142 | // the "plain" GR classes might not come first. | |||
53143 | // Therefore, use a helper method. | |||
53144 | if (isGRClass(*Class)) { | |||
53145 | unsigned Size = VT.getSizeInBits(); | |||
53146 | if (Size == 1) Size = 8; | |||
53147 | Register DestReg = getX86SubSuperRegisterOrZero(Res.first, Size); | |||
53148 | if (DestReg > 0) { | |||
53149 | bool is64Bit = Subtarget.is64Bit(); | |||
53150 | const TargetRegisterClass *RC = | |||
53151 | Size == 8 ? (is64Bit ? &X86::GR8RegClass : &X86::GR8_NOREXRegClass) | |||
53152 | : Size == 16 ? (is64Bit ? &X86::GR16RegClass : &X86::GR16_NOREXRegClass) | |||
53153 | : Size == 32 ? (is64Bit ? &X86::GR32RegClass : &X86::GR32_NOREXRegClass) | |||
53154 | : Size == 64 ? (is64Bit ? &X86::GR64RegClass : nullptr) | |||
53155 | : nullptr; | |||
53156 | if (Size == 64 && !is64Bit) { | |||
53157 | // Model GCC's behavior here and select a fixed pair of 32-bit | |||
53158 | // registers. | |||
53159 | switch (DestReg) { | |||
53160 | case X86::RAX: | |||
53161 | return std::make_pair(X86::EAX, &X86::GR32_ADRegClass); | |||
53162 | case X86::RDX: | |||
53163 | return std::make_pair(X86::EDX, &X86::GR32_DCRegClass); | |||
53164 | case X86::RCX: | |||
53165 | return std::make_pair(X86::ECX, &X86::GR32_CBRegClass); | |||
53166 | case X86::RBX: | |||
53167 | return std::make_pair(X86::EBX, &X86::GR32_BSIRegClass); | |||
53168 | case X86::RSI: | |||
53169 | return std::make_pair(X86::ESI, &X86::GR32_SIDIRegClass); | |||
53170 | case X86::RDI: | |||
53171 | return std::make_pair(X86::EDI, &X86::GR32_DIBPRegClass); | |||
53172 | case X86::RBP: | |||
53173 | return std::make_pair(X86::EBP, &X86::GR32_BPSPRegClass); | |||
53174 | default: | |||
53175 | return std::make_pair(0, nullptr); | |||
53176 | } | |||
53177 | } | |||
53178 | if (RC && RC->contains(DestReg)) | |||
53179 | return std::make_pair(DestReg, RC); | |||
53180 | return Res; | |||
53181 | } | |||
53182 | // No register found/type mismatch. | |||
53183 | return std::make_pair(0, nullptr); | |||
53184 | } else if (isFRClass(*Class)) { | |||
53185 | // Handle references to XMM physical registers that got mapped into the | |||
53186 | // wrong class. This can happen with constraints like {xmm0} where the | |||
53187 | // target independent register mapper will just pick the first match it can | |||
53188 | // find, ignoring the required type. | |||
53189 | ||||
53190 | // TODO: Handle f128 and i128 in FR128RegClass after it is tested well. | |||
53191 | if (VT == MVT::f32 || VT == MVT::i32) | |||
53192 | Res.second = &X86::FR32XRegClass; | |||
53193 | else if (VT == MVT::f64 || VT == MVT::i64) | |||
53194 | Res.second = &X86::FR64XRegClass; | |||
53195 | else if (TRI->isTypeLegalForClass(X86::VR128XRegClass, VT)) | |||
53196 | Res.second = &X86::VR128XRegClass; | |||
53197 | else if (TRI->isTypeLegalForClass(X86::VR256XRegClass, VT)) | |||
53198 | Res.second = &X86::VR256XRegClass; | |||
53199 | else if (TRI->isTypeLegalForClass(X86::VR512RegClass, VT)) | |||
53200 | Res.second = &X86::VR512RegClass; | |||
53201 | else { | |||
53202 | // Type mismatch and not a clobber: Return an error; | |||
53203 | Res.first = 0; | |||
53204 | Res.second = nullptr; | |||
53205 | } | |||
53206 | } else if (isVKClass(*Class)) { | |||
53207 | if (VT == MVT::i1) | |||
53208 | Res.second = &X86::VK1RegClass; | |||
53209 | else if (VT == MVT::i8) | |||
53210 | Res.second = &X86::VK8RegClass; | |||
53211 | else if (VT == MVT::i16) | |||
53212 | Res.second = &X86::VK16RegClass; | |||
53213 | else if (VT == MVT::i32) | |||
53214 | Res.second = &X86::VK32RegClass; | |||
53215 | else if (VT == MVT::i64) | |||
53216 | Res.second = &X86::VK64RegClass; | |||
53217 | else { | |||
53218 | // Type mismatch and not a clobber: Return an error; | |||
53219 | Res.first = 0; | |||
53220 | Res.second = nullptr; | |||
53221 | } | |||
53222 | } | |||
53223 | ||||
53224 | return Res; | |||
53225 | } | |||
53226 | ||||
53227 | InstructionCost X86TargetLowering::getScalingFactorCost(const DataLayout &DL, | |||
53228 | const AddrMode &AM, | |||
53229 | Type *Ty, | |||
53230 | unsigned AS) const { | |||
53231 | // Scaling factors are not free at all. | |||
53232 | // An indexed folded instruction, i.e., inst (reg1, reg2, scale), | |||
53233 | // will take 2 allocations in the out of order engine instead of 1 | |||
53234 | // for plain addressing mode, i.e. inst (reg1). | |||
53235 | // E.g., | |||
53236 | // vaddps (%rsi,%rdx), %ymm0, %ymm1 | |||
53237 | // Requires two allocations (one for the load, one for the computation) | |||
53238 | // whereas: | |||
53239 | // vaddps (%rsi), %ymm0, %ymm1 | |||
53240 | // Requires just 1 allocation, i.e., freeing allocations for other operations | |||
53241 | // and having less micro operations to execute. | |||
53242 | // | |||
53243 | // For some X86 architectures, this is even worse because for instance for | |||
53244 | // stores, the complex addressing mode forces the instruction to use the | |||
53245 | // "load" ports instead of the dedicated "store" port. | |||
53246 | // E.g., on Haswell: | |||
53247 | // vmovaps %ymm1, (%r8, %rdi) can use port 2 or 3. | |||
53248 | // vmovaps %ymm1, (%r8) can use port 2, 3, or 7. | |||
53249 | if (isLegalAddressingMode(DL, AM, Ty, AS)) | |||
53250 | // Scale represents reg2 * scale, thus account for 1 | |||
53251 | // as soon as we use a second register. | |||
53252 | return AM.Scale != 0; | |||
53253 | return -1; | |||
53254 | } | |||
53255 | ||||
53256 | bool X86TargetLowering::isIntDivCheap(EVT VT, AttributeList Attr) const { | |||
53257 | // Integer division on x86 is expensive. However, when aggressively optimizing | |||
53258 | // for code size, we prefer to use a div instruction, as it is usually smaller | |||
53259 | // than the alternative sequence. | |||
53260 | // The exception to this is vector division. Since x86 doesn't have vector | |||
53261 | // integer division, leaving the division as-is is a loss even in terms of | |||
53262 | // size, because it will have to be scalarized, while the alternative code | |||
53263 | // sequence can be performed in vector form. | |||
53264 | bool OptSize = Attr.hasFnAttr(Attribute::MinSize); | |||
53265 | return OptSize && !VT.isVector(); | |||
53266 | } | |||
53267 | ||||
53268 | void X86TargetLowering::initializeSplitCSR(MachineBasicBlock *Entry) const { | |||
53269 | if (!Subtarget.is64Bit()) | |||
53270 | return; | |||
53271 | ||||
53272 | // Update IsSplitCSR in X86MachineFunctionInfo. | |||
53273 | X86MachineFunctionInfo *AFI = | |||
53274 | Entry->getParent()->getInfo<X86MachineFunctionInfo>(); | |||
53275 | AFI->setIsSplitCSR(true); | |||
53276 | } | |||
53277 | ||||
53278 | void X86TargetLowering::insertCopiesSplitCSR( | |||
53279 | MachineBasicBlock *Entry, | |||
53280 | const SmallVectorImpl<MachineBasicBlock *> &Exits) const { | |||
53281 | const X86RegisterInfo *TRI = Subtarget.getRegisterInfo(); | |||
53282 | const MCPhysReg *IStart = TRI->getCalleeSavedRegsViaCopy(Entry->getParent()); | |||
53283 | if (!IStart) | |||
53284 | return; | |||
53285 | ||||
53286 | const TargetInstrInfo *TII = Subtarget.getInstrInfo(); | |||
53287 | MachineRegisterInfo *MRI = &Entry->getParent()->getRegInfo(); | |||
53288 | MachineBasicBlock::iterator MBBI = Entry->begin(); | |||
53289 | for (const MCPhysReg *I = IStart; *I; ++I) { | |||
53290 | const TargetRegisterClass *RC = nullptr; | |||
53291 | if (X86::GR64RegClass.contains(*I)) | |||
53292 | RC = &X86::GR64RegClass; | |||
53293 | else | |||
53294 | llvm_unreachable("Unexpected register class in CSRsViaCopy!")::llvm::llvm_unreachable_internal("Unexpected register class in CSRsViaCopy!" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 53294); | |||
53295 | ||||
53296 | Register NewVR = MRI->createVirtualRegister(RC); | |||
53297 | // Create copy from CSR to a virtual register. | |||
53298 | // FIXME: this currently does not emit CFI pseudo-instructions, it works | |||
53299 | // fine for CXX_FAST_TLS since the C++-style TLS access functions should be | |||
53300 | // nounwind. If we want to generalize this later, we may need to emit | |||
53301 | // CFI pseudo-instructions. | |||
53302 | assert((static_cast <bool> (Entry->getParent()->getFunction ().hasFnAttribute(Attribute::NoUnwind) && "Function should be nounwind in insertCopiesSplitCSR!" ) ? void (0) : __assert_fail ("Entry->getParent()->getFunction().hasFnAttribute(Attribute::NoUnwind) && \"Function should be nounwind in insertCopiesSplitCSR!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 53304, __extension__ __PRETTY_FUNCTION__)) | |||
53303 | Entry->getParent()->getFunction().hasFnAttribute(Attribute::NoUnwind) &&(static_cast <bool> (Entry->getParent()->getFunction ().hasFnAttribute(Attribute::NoUnwind) && "Function should be nounwind in insertCopiesSplitCSR!" ) ? void (0) : __assert_fail ("Entry->getParent()->getFunction().hasFnAttribute(Attribute::NoUnwind) && \"Function should be nounwind in insertCopiesSplitCSR!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 53304, __extension__ __PRETTY_FUNCTION__)) | |||
53304 | "Function should be nounwind in insertCopiesSplitCSR!")(static_cast <bool> (Entry->getParent()->getFunction ().hasFnAttribute(Attribute::NoUnwind) && "Function should be nounwind in insertCopiesSplitCSR!" ) ? void (0) : __assert_fail ("Entry->getParent()->getFunction().hasFnAttribute(Attribute::NoUnwind) && \"Function should be nounwind in insertCopiesSplitCSR!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/llvm/lib/Target/X86/X86ISelLowering.cpp" , 53304, __extension__ __PRETTY_FUNCTION__)); | |||
53305 | Entry->addLiveIn(*I); | |||
53306 | BuildMI(*Entry, MBBI, DebugLoc(), TII->get(TargetOpcode::COPY), NewVR) | |||
53307 | .addReg(*I); | |||
53308 | ||||
53309 | // Insert the copy-back instructions right before the terminator. | |||
53310 | for (auto *Exit : Exits) | |||
53311 | BuildMI(*Exit, Exit->getFirstTerminator(), DebugLoc(), | |||
53312 | TII->get(TargetOpcode::COPY), *I) | |||
53313 | .addReg(NewVR); | |||
53314 | } | |||
53315 | } | |||
53316 | ||||
53317 | bool X86TargetLowering::supportSwiftError() const { | |||
53318 | return Subtarget.is64Bit(); | |||
53319 | } | |||
53320 | ||||
53321 | /// Returns true if stack probing through a function call is requested. | |||
53322 | bool X86TargetLowering::hasStackProbeSymbol(MachineFunction &MF) const { | |||
53323 | return !getStackProbeSymbolName(MF).empty(); | |||
53324 | } | |||
53325 | ||||
53326 | /// Returns true if stack probing through inline assembly is requested. | |||
53327 | bool X86TargetLowering::hasInlineStackProbe(MachineFunction &MF) const { | |||
53328 | ||||
53329 | // No inline stack probe for Windows, they have their own mechanism. | |||
53330 | if (Subtarget.isOSWindows() || | |||
53331 | MF.getFunction().hasFnAttribute("no-stack-arg-probe")) | |||
53332 | return false; | |||
53333 | ||||
53334 | // If the function specifically requests inline stack probes, emit them. | |||
53335 | if (MF.getFunction().hasFnAttribute("probe-stack")) | |||
53336 | return MF.getFunction().getFnAttribute("probe-stack").getValueAsString() == | |||
53337 | "inline-asm"; | |||
53338 | ||||
53339 | return false; | |||
53340 | } | |||
53341 | ||||
53342 | /// Returns the name of the symbol used to emit stack probes or the empty | |||
53343 | /// string if not applicable. | |||
53344 | StringRef | |||
53345 | X86TargetLowering::getStackProbeSymbolName(MachineFunction &MF) const { | |||
53346 | // Inline Stack probes disable stack probe call | |||
53347 | if (hasInlineStackProbe(MF)) | |||
53348 | return ""; | |||
53349 | ||||
53350 | // If the function specifically requests stack probes, emit them. | |||
53351 | if (MF.getFunction().hasFnAttribute("probe-stack")) | |||
53352 | return MF.getFunction().getFnAttribute("probe-stack").getValueAsString(); | |||
53353 | ||||
53354 | // Generally, if we aren't on Windows, the platform ABI does not include | |||
53355 | // support for stack probes, so don't emit them. | |||
53356 | if (!Subtarget.isOSWindows() || Subtarget.isTargetMachO() || | |||
53357 | MF.getFunction().hasFnAttribute("no-stack-arg-probe")) | |||
53358 | return ""; | |||
53359 | ||||
53360 | // We need a stack probe to conform to the Windows ABI. Choose the right | |||
53361 | // symbol. | |||
53362 | if (Subtarget.is64Bit()) | |||
53363 | return Subtarget.isTargetCygMing() ? "___chkstk_ms" : "__chkstk"; | |||
53364 | return Subtarget.isTargetCygMing() ? "_alloca" : "_chkstk"; | |||
53365 | } | |||
53366 | ||||
53367 | unsigned | |||
53368 | X86TargetLowering::getStackProbeSize(MachineFunction &MF) const { | |||
53369 | // The default stack probe size is 4096 if the function has no stackprobesize | |||
53370 | // attribute. | |||
53371 | unsigned StackProbeSize = 4096; | |||
53372 | const Function &Fn = MF.getFunction(); | |||
53373 | if (Fn.hasFnAttribute("stack-probe-size")) | |||
53374 | Fn.getFnAttribute("stack-probe-size") | |||
53375 | .getValueAsString() | |||
53376 | .getAsInteger(0, StackProbeSize); | |||
53377 | return StackProbeSize; | |||
53378 | } | |||
53379 | ||||
53380 | Align X86TargetLowering::getPrefLoopAlignment(MachineLoop *ML) const { | |||
53381 | if (ML->isInnermost() && | |||
53382 | ExperimentalPrefInnermostLoopAlignment.getNumOccurrences()) | |||
53383 | return Align(1ULL << ExperimentalPrefInnermostLoopAlignment); | |||
53384 | return TargetLowering::getPrefLoopAlignment(); | |||
53385 | } |
1 | //===-- X86Subtarget.h - Define Subtarget for the X86 ----------*- C++ -*--===// | ||||
2 | // | ||||
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | ||||
4 | // See https://llvm.org/LICENSE.txt for license information. | ||||
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | ||||
6 | // | ||||
7 | //===----------------------------------------------------------------------===// | ||||
8 | // | ||||
9 | // This file declares the X86 specific subclass of TargetSubtargetInfo. | ||||
10 | // | ||||
11 | //===----------------------------------------------------------------------===// | ||||
12 | |||||
13 | #ifndef LLVM_LIB_TARGET_X86_X86SUBTARGET_H | ||||
14 | #define LLVM_LIB_TARGET_X86_X86SUBTARGET_H | ||||
15 | |||||
16 | #include "X86FrameLowering.h" | ||||
17 | #include "X86ISelLowering.h" | ||||
18 | #include "X86InstrInfo.h" | ||||
19 | #include "X86SelectionDAGInfo.h" | ||||
20 | #include "llvm/ADT/Triple.h" | ||||
21 | #include "llvm/CodeGen/TargetSubtargetInfo.h" | ||||
22 | #include "llvm/IR/CallingConv.h" | ||||
23 | #include <climits> | ||||
24 | #include <memory> | ||||
25 | |||||
26 | #define GET_SUBTARGETINFO_HEADER | ||||
27 | #include "X86GenSubtargetInfo.inc" | ||||
28 | |||||
29 | namespace llvm { | ||||
30 | |||||
31 | class CallLowering; | ||||
32 | class GlobalValue; | ||||
33 | class InstructionSelector; | ||||
34 | class LegalizerInfo; | ||||
35 | class RegisterBankInfo; | ||||
36 | class StringRef; | ||||
37 | class TargetMachine; | ||||
38 | |||||
39 | /// The X86 backend supports a number of different styles of PIC. | ||||
40 | /// | ||||
41 | namespace PICStyles { | ||||
42 | |||||
43 | enum class Style { | ||||
44 | StubPIC, // Used on i386-darwin in pic mode. | ||||
45 | GOT, // Used on 32 bit elf on when in pic mode. | ||||
46 | RIPRel, // Used on X86-64 when in pic mode. | ||||
47 | None // Set when not in pic mode. | ||||
48 | }; | ||||
49 | |||||
50 | } // end namespace PICStyles | ||||
51 | |||||
52 | class X86Subtarget final : public X86GenSubtargetInfo { | ||||
53 | // NOTE: Do not add anything new to this list. Coarse, CPU name based flags | ||||
54 | // are not a good idea. We should be migrating away from these. | ||||
55 | enum X86ProcFamilyEnum { | ||||
56 | Others, | ||||
57 | IntelAtom, | ||||
58 | IntelSLM | ||||
59 | }; | ||||
60 | |||||
61 | enum X86SSEEnum { | ||||
62 | NoSSE, SSE1, SSE2, SSE3, SSSE3, SSE41, SSE42, AVX, AVX2, AVX512F | ||||
63 | }; | ||||
64 | |||||
65 | enum X863DNowEnum { | ||||
66 | NoThreeDNow, MMX, ThreeDNow, ThreeDNowA | ||||
67 | }; | ||||
68 | |||||
69 | /// X86 processor family: Intel Atom, and others | ||||
70 | X86ProcFamilyEnum X86ProcFamily = Others; | ||||
71 | |||||
72 | /// Which PIC style to use | ||||
73 | PICStyles::Style PICStyle; | ||||
74 | |||||
75 | const TargetMachine &TM; | ||||
76 | |||||
77 | /// SSE1, SSE2, SSE3, SSSE3, SSE41, SSE42, or none supported. | ||||
78 | X86SSEEnum X86SSELevel = NoSSE; | ||||
79 | |||||
80 | /// MMX, 3DNow, 3DNow Athlon, or none supported. | ||||
81 | X863DNowEnum X863DNowLevel = NoThreeDNow; | ||||
82 | |||||
83 | /// True if the processor supports X87 instructions. | ||||
84 | bool HasX87 = false; | ||||
85 | |||||
86 | /// True if the processor supports CMPXCHG8B. | ||||
87 | bool HasCmpxchg8b = false; | ||||
88 | |||||
89 | /// True if this processor has NOPL instruction | ||||
90 | /// (generally pentium pro+). | ||||
91 | bool HasNOPL = false; | ||||
92 | |||||
93 | /// True if this processor has conditional move instructions | ||||
94 | /// (generally pentium pro+). | ||||
95 | bool HasCMov = false; | ||||
96 | |||||
97 | /// True if the processor supports X86-64 instructions. | ||||
98 | bool HasX86_64 = false; | ||||
99 | |||||
100 | /// True if the processor supports POPCNT. | ||||
101 | bool HasPOPCNT = false; | ||||
102 | |||||
103 | /// True if the processor supports SSE4A instructions. | ||||
104 | bool HasSSE4A = false; | ||||
105 | |||||
106 | /// Target has AES instructions | ||||
107 | bool HasAES = false; | ||||
108 | bool HasVAES = false; | ||||
109 | |||||
110 | /// Target has FXSAVE/FXRESTOR instructions | ||||
111 | bool HasFXSR = false; | ||||
112 | |||||
113 | /// Target has XSAVE instructions | ||||
114 | bool HasXSAVE = false; | ||||
115 | |||||
116 | /// Target has XSAVEOPT instructions | ||||
117 | bool HasXSAVEOPT = false; | ||||
118 | |||||
119 | /// Target has XSAVEC instructions | ||||
120 | bool HasXSAVEC = false; | ||||
121 | |||||
122 | /// Target has XSAVES instructions | ||||
123 | bool HasXSAVES = false; | ||||
124 | |||||
125 | /// Target has carry-less multiplication | ||||
126 | bool HasPCLMUL = false; | ||||
127 | bool HasVPCLMULQDQ = false; | ||||
128 | |||||
129 | /// Target has Galois Field Arithmetic instructions | ||||
130 | bool HasGFNI = false; | ||||
131 | |||||
132 | /// Target has 3-operand fused multiply-add | ||||
133 | bool HasFMA = false; | ||||
134 | |||||
135 | /// Target has 4-operand fused multiply-add | ||||
136 | bool HasFMA4 = false; | ||||
137 | |||||
138 | /// Target has XOP instructions | ||||
139 | bool HasXOP = false; | ||||
140 | |||||
141 | /// Target has TBM instructions. | ||||
142 | bool HasTBM = false; | ||||
143 | |||||
144 | /// Target has LWP instructions | ||||
145 | bool HasLWP = false; | ||||
146 | |||||
147 | /// True if the processor has the MOVBE instruction. | ||||
148 | bool HasMOVBE = false; | ||||
149 | |||||
150 | /// True if the processor has the RDRAND instruction. | ||||
151 | bool HasRDRAND = false; | ||||
152 | |||||
153 | /// Processor has 16-bit floating point conversion instructions. | ||||
154 | bool HasF16C = false; | ||||
155 | |||||
156 | /// Processor has FS/GS base insturctions. | ||||
157 | bool HasFSGSBase = false; | ||||
158 | |||||
159 | /// Processor has LZCNT instruction. | ||||
160 | bool HasLZCNT = false; | ||||
161 | |||||
162 | /// Processor has BMI1 instructions. | ||||
163 | bool HasBMI = false; | ||||
164 | |||||
165 | /// Processor has BMI2 instructions. | ||||
166 | bool HasBMI2 = false; | ||||
167 | |||||
168 | /// Processor has VBMI instructions. | ||||
169 | bool HasVBMI = false; | ||||
170 | |||||
171 | /// Processor has VBMI2 instructions. | ||||
172 | bool HasVBMI2 = false; | ||||
173 | |||||
174 | /// Processor has Integer Fused Multiply Add | ||||
175 | bool HasIFMA = false; | ||||
176 | |||||
177 | /// Processor has RTM instructions. | ||||
178 | bool HasRTM = false; | ||||
179 | |||||
180 | /// Processor has ADX instructions. | ||||
181 | bool HasADX = false; | ||||
182 | |||||
183 | /// Processor has SHA instructions. | ||||
184 | bool HasSHA = false; | ||||
185 | |||||
186 | /// Processor has PRFCHW instructions. | ||||
187 | bool HasPRFCHW = false; | ||||
188 | |||||
189 | /// Processor has RDSEED instructions. | ||||
190 | bool HasRDSEED = false; | ||||
191 | |||||
192 | /// Processor has LAHF/SAHF instructions in 64-bit mode. | ||||
193 | bool HasLAHFSAHF64 = false; | ||||
194 | |||||
195 | /// Processor has MONITORX/MWAITX instructions. | ||||
196 | bool HasMWAITX = false; | ||||
197 | |||||
198 | /// Processor has Cache Line Zero instruction | ||||
199 | bool HasCLZERO = false; | ||||
200 | |||||
201 | /// Processor has Cache Line Demote instruction | ||||
202 | bool HasCLDEMOTE = false; | ||||
203 | |||||
204 | /// Processor has MOVDIRI instruction (direct store integer). | ||||
205 | bool HasMOVDIRI = false; | ||||
206 | |||||
207 | /// Processor has MOVDIR64B instruction (direct store 64 bytes). | ||||
208 | bool HasMOVDIR64B = false; | ||||
209 | |||||
210 | /// Processor has ptwrite instruction. | ||||
211 | bool HasPTWRITE = false; | ||||
212 | |||||
213 | /// Processor has Prefetch with intent to Write instruction | ||||
214 | bool HasPREFETCHWT1 = false; | ||||
215 | |||||
216 | /// True if SHLD instructions are slow. | ||||
217 | bool IsSHLDSlow = false; | ||||
218 | |||||
219 | /// True if the PMULLD instruction is slow compared to PMULLW/PMULHW and | ||||
220 | // PMULUDQ. | ||||
221 | bool IsPMULLDSlow = false; | ||||
222 | |||||
223 | /// True if the PMADDWD instruction is slow compared to PMULLD. | ||||
224 | bool IsPMADDWDSlow = false; | ||||
225 | |||||
226 | /// True if unaligned memory accesses of 16-bytes are slow. | ||||
227 | bool IsUAMem16Slow = false; | ||||
228 | |||||
229 | /// True if unaligned memory accesses of 32-bytes are slow. | ||||
230 | bool IsUAMem32Slow = false; | ||||
231 | |||||
232 | /// True if SSE operations can have unaligned memory operands. | ||||
233 | /// This may require setting a configuration bit in the processor. | ||||
234 | bool HasSSEUnalignedMem = false; | ||||
235 | |||||
236 | /// True if this processor has the CMPXCHG16B instruction; | ||||
237 | /// this is true for most x86-64 chips, but not the first AMD chips. | ||||
238 | bool HasCmpxchg16b = false; | ||||
239 | |||||
240 | /// True if the LEA instruction should be used for adjusting | ||||
241 | /// the stack pointer. This is an optimization for Intel Atom processors. | ||||
242 | bool UseLeaForSP = false; | ||||
243 | |||||
244 | /// True if POPCNT instruction has a false dependency on the destination register. | ||||
245 | bool HasPOPCNTFalseDeps = false; | ||||
246 | |||||
247 | /// True if LZCNT/TZCNT instructions have a false dependency on the destination register. | ||||
248 | bool HasLZCNTFalseDeps = false; | ||||
249 | |||||
250 | /// True if its preferable to combine to a single cross-lane shuffle | ||||
251 | /// using a variable mask over multiple fixed shuffles. | ||||
252 | bool HasFastVariableCrossLaneShuffle = false; | ||||
253 | |||||
254 | /// True if its preferable to combine to a single per-lane shuffle | ||||
255 | /// using a variable mask over multiple fixed shuffles. | ||||
256 | bool HasFastVariablePerLaneShuffle = false; | ||||
257 | |||||
258 | /// True if vzeroupper instructions should be inserted after code that uses | ||||
259 | /// ymm or zmm registers. | ||||
260 | bool InsertVZEROUPPER = false; | ||||
261 | |||||
262 | /// True if there is no performance penalty for writing NOPs with up to | ||||
263 | /// 7 bytes. | ||||
264 | bool HasFast7ByteNOP = false; | ||||
265 | |||||
266 | /// True if there is no performance penalty for writing NOPs with up to | ||||
267 | /// 11 bytes. | ||||
268 | bool HasFast11ByteNOP = false; | ||||
269 | |||||
270 | /// True if there is no performance penalty for writing NOPs with up to | ||||
271 | /// 15 bytes. | ||||
272 | bool HasFast15ByteNOP = false; | ||||
273 | |||||
274 | /// True if gather is reasonably fast. This is true for Skylake client and | ||||
275 | /// all AVX-512 CPUs. | ||||
276 | bool HasFastGather = false; | ||||
277 | |||||
278 | /// True if hardware SQRTSS instruction is at least as fast (latency) as | ||||
279 | /// RSQRTSS followed by a Newton-Raphson iteration. | ||||
280 | bool HasFastScalarFSQRT = false; | ||||
281 | |||||
282 | /// True if hardware SQRTPS/VSQRTPS instructions are at least as fast | ||||
283 | /// (throughput) as RSQRTPS/VRSQRTPS followed by a Newton-Raphson iteration. | ||||
284 | bool HasFastVectorFSQRT = false; | ||||
285 | |||||
286 | /// True if 8-bit divisions are significantly faster than | ||||
287 | /// 32-bit divisions and should be used when possible. | ||||
288 | bool HasSlowDivide32 = false; | ||||
289 | |||||
290 | /// True if 32-bit divides are significantly faster than | ||||
291 | /// 64-bit divisions and should be used when possible. | ||||
292 | bool HasSlowDivide64 = false; | ||||
293 | |||||
294 | /// True if LZCNT instruction is fast. | ||||
295 | bool HasFastLZCNT = false; | ||||
296 | |||||
297 | /// True if SHLD based rotate is fast. | ||||
298 | bool HasFastSHLDRotate = false; | ||||
299 | |||||
300 | /// True if the processor supports macrofusion. | ||||
301 | bool HasMacroFusion = false; | ||||
302 | |||||
303 | /// True if the processor supports branch fusion. | ||||
304 | bool HasBranchFusion = false; | ||||
305 | |||||
306 | /// True if the processor has enhanced REP MOVSB/STOSB. | ||||
307 | bool HasERMSB = false; | ||||
308 | |||||
309 | /// True if the processor has fast short REP MOV. | ||||
310 | bool HasFSRM = false; | ||||
311 | |||||
312 | /// True if the short functions should be padded to prevent | ||||
313 | /// a stall when returning too early. | ||||
314 | bool PadShortFunctions = false; | ||||
315 | |||||
316 | /// True if two memory operand instructions should use a temporary register | ||||
317 | /// instead. | ||||
318 | bool SlowTwoMemOps = false; | ||||
319 | |||||
320 | /// True if the LEA instruction inputs have to be ready at address generation | ||||
321 | /// (AG) time. | ||||
322 | bool LEAUsesAG = false; | ||||
323 | |||||
324 | /// True if the LEA instruction with certain arguments is slow | ||||
325 | bool SlowLEA = false; | ||||
326 | |||||
327 | /// True if the LEA instruction has all three source operands: base, index, | ||||
328 | /// and offset or if the LEA instruction uses base and index registers where | ||||
329 | /// the base is EBP, RBP,or R13 | ||||
330 | bool Slow3OpsLEA = false; | ||||
331 | |||||
332 | /// True if INC and DEC instructions are slow when writing to flags | ||||
333 | bool SlowIncDec = false; | ||||
334 | |||||
335 | /// Processor has AVX-512 PreFetch Instructions | ||||
336 | bool HasPFI = false; | ||||
337 | |||||
338 | /// Processor has AVX-512 Exponential and Reciprocal Instructions | ||||
339 | bool HasERI = false; | ||||
340 | |||||
341 | /// Processor has AVX-512 Conflict Detection Instructions | ||||
342 | bool HasCDI = false; | ||||
343 | |||||
344 | /// Processor has AVX-512 population count Instructions | ||||
345 | bool HasVPOPCNTDQ = false; | ||||
346 | |||||
347 | /// Processor has AVX-512 Doubleword and Quadword instructions | ||||
348 | bool HasDQI = false; | ||||
349 | |||||
350 | /// Processor has AVX-512 Byte and Word instructions | ||||
351 | bool HasBWI = false; | ||||
352 | |||||
353 | /// Processor has AVX-512 Vector Length eXtenstions | ||||
354 | bool HasVLX = false; | ||||
355 | |||||
356 | /// Processor has AVX-512 16 bit floating-point extenstions | ||||
357 | bool HasFP16 = false; | ||||
358 | |||||
359 | /// Processor has PKU extenstions | ||||
360 | bool HasPKU = false; | ||||
361 | |||||
362 | /// Processor has AVX-512 Vector Neural Network Instructions | ||||
363 | bool HasVNNI = false; | ||||
364 | |||||
365 | /// Processor has AVX Vector Neural Network Instructions | ||||
366 | bool HasAVXVNNI = false; | ||||
367 | |||||
368 | /// Processor has AVX-512 bfloat16 floating-point extensions | ||||
369 | bool HasBF16 = false; | ||||
370 | |||||
371 | /// Processor supports ENQCMD instructions | ||||
372 | bool HasENQCMD = false; | ||||
373 | |||||
374 | /// Processor has AVX-512 Bit Algorithms instructions | ||||
375 | bool HasBITALG = false; | ||||
376 | |||||
377 | /// Processor has AVX-512 vp2intersect instructions | ||||
378 | bool HasVP2INTERSECT = false; | ||||
379 | |||||
380 | /// Processor supports CET SHSTK - Control-Flow Enforcement Technology | ||||
381 | /// using Shadow Stack | ||||
382 | bool HasSHSTK = false; | ||||
383 | |||||
384 | /// Processor supports Invalidate Process-Context Identifier | ||||
385 | bool HasINVPCID = false; | ||||
386 | |||||
387 | /// Processor has Software Guard Extensions | ||||
388 | bool HasSGX = false; | ||||
389 | |||||
390 | /// Processor supports Flush Cache Line instruction | ||||
391 | bool HasCLFLUSHOPT = false; | ||||
392 | |||||
393 | /// Processor supports Cache Line Write Back instruction | ||||
394 | bool HasCLWB = false; | ||||
395 | |||||
396 | /// Processor supports Write Back No Invalidate instruction | ||||
397 | bool HasWBNOINVD = false; | ||||
398 | |||||
399 | /// Processor support RDPID instruction | ||||
400 | bool HasRDPID = false; | ||||
401 | |||||
402 | /// Processor supports WaitPKG instructions | ||||
403 | bool HasWAITPKG = false; | ||||
404 | |||||
405 | /// Processor supports PCONFIG instruction | ||||
406 | bool HasPCONFIG = false; | ||||
407 | |||||
408 | /// Processor support key locker instructions | ||||
409 | bool HasKL = false; | ||||
410 | |||||
411 | /// Processor support key locker wide instructions | ||||
412 | bool HasWIDEKL = false; | ||||
413 | |||||
414 | /// Processor supports HRESET instruction | ||||
415 | bool HasHRESET = false; | ||||
416 | |||||
417 | /// Processor supports SERIALIZE instruction | ||||
418 | bool HasSERIALIZE = false; | ||||
419 | |||||
420 | /// Processor supports TSXLDTRK instruction | ||||
421 | bool HasTSXLDTRK = false; | ||||
422 | |||||
423 | /// Processor has AMX support | ||||
424 | bool HasAMXTILE = false; | ||||
425 | bool HasAMXBF16 = false; | ||||
426 | bool HasAMXINT8 = false; | ||||
427 | |||||
428 | /// Processor supports User Level Interrupt instructions | ||||
429 | bool HasUINTR = false; | ||||
430 | |||||
431 | /// Processor has a single uop BEXTR implementation. | ||||
432 | bool HasFastBEXTR = false; | ||||
433 | |||||
434 | /// Try harder to combine to horizontal vector ops if they are fast. | ||||
435 | bool HasFastHorizontalOps = false; | ||||
436 | |||||
437 | /// Prefer a left/right scalar logical shifts pair over a shift+and pair. | ||||
438 | bool HasFastScalarShiftMasks = false; | ||||
439 | |||||
440 | /// Prefer a left/right vector logical shifts pair over a shift+and pair. | ||||
441 | bool HasFastVectorShiftMasks = false; | ||||
442 | |||||
443 | /// Prefer a movbe over a single-use load + bswap / single-use bswap + store. | ||||
444 | bool HasFastMOVBE = false; | ||||
445 | |||||
446 | /// Use a retpoline thunk rather than indirect calls to block speculative | ||||
447 | /// execution. | ||||
448 | bool UseRetpolineIndirectCalls = false; | ||||
449 | |||||
450 | /// Use a retpoline thunk or remove any indirect branch to block speculative | ||||
451 | /// execution. | ||||
452 | bool UseRetpolineIndirectBranches = false; | ||||
453 | |||||
454 | /// Deprecated flag, query `UseRetpolineIndirectCalls` and | ||||
455 | /// `UseRetpolineIndirectBranches` instead. | ||||
456 | bool DeprecatedUseRetpoline = false; | ||||
457 | |||||
458 | /// When using a retpoline thunk, call an externally provided thunk rather | ||||
459 | /// than emitting one inside the compiler. | ||||
460 | bool UseRetpolineExternalThunk = false; | ||||
461 | |||||
462 | /// Prevent generation of indirect call/branch instructions from memory, | ||||
463 | /// and force all indirect call/branch instructions from a register to be | ||||
464 | /// preceded by an LFENCE. Also decompose RET instructions into a | ||||
465 | /// POP+LFENCE+JMP sequence. | ||||
466 | bool UseLVIControlFlowIntegrity = false; | ||||
467 | |||||
468 | /// Enable Speculative Execution Side Effect Suppression | ||||
469 | bool UseSpeculativeExecutionSideEffectSuppression = false; | ||||
470 | |||||
471 | /// Insert LFENCE instructions to prevent data speculatively injected into | ||||
472 | /// loads from being used maliciously. | ||||
473 | bool UseLVILoadHardening = false; | ||||
474 | |||||
475 | /// Use software floating point for code generation. | ||||
476 | bool UseSoftFloat = false; | ||||
477 | |||||
478 | /// Use alias analysis during code generation. | ||||
479 | bool UseAA = false; | ||||
480 | |||||
481 | /// The minimum alignment known to hold of the stack frame on | ||||
482 | /// entry to the function and which must be maintained by every function. | ||||
483 | Align stackAlignment = Align(4); | ||||
484 | |||||
485 | Align TileConfigAlignment = Align(4); | ||||
486 | |||||
487 | /// Max. memset / memcpy size that is turned into rep/movs, rep/stos ops. | ||||
488 | /// | ||||
489 | // FIXME: this is a known good value for Yonah. How about others? | ||||
490 | unsigned MaxInlineSizeThreshold = 128; | ||||
491 | |||||
492 | /// Indicates target prefers 128 bit instructions. | ||||
493 | bool Prefer128Bit = false; | ||||
494 | |||||
495 | /// Indicates target prefers 256 bit instructions. | ||||
496 | bool Prefer256Bit = false; | ||||
497 | |||||
498 | /// Indicates target prefers AVX512 mask registers. | ||||
499 | bool PreferMaskRegisters = false; | ||||
500 | |||||
501 | /// Use Goldmont specific floating point div/sqrt costs. | ||||
502 | bool UseGLMDivSqrtCosts = false; | ||||
503 | |||||
504 | /// What processor and OS we're targeting. | ||||
505 | Triple TargetTriple; | ||||
506 | |||||
507 | /// GlobalISel related APIs. | ||||
508 | std::unique_ptr<CallLowering> CallLoweringInfo; | ||||
509 | std::unique_ptr<LegalizerInfo> Legalizer; | ||||
510 | std::unique_ptr<RegisterBankInfo> RegBankInfo; | ||||
511 | std::unique_ptr<InstructionSelector> InstSelector; | ||||
512 | |||||
513 | private: | ||||
514 | /// Override the stack alignment. | ||||
515 | MaybeAlign StackAlignOverride; | ||||
516 | |||||
517 | /// Preferred vector width from function attribute. | ||||
518 | unsigned PreferVectorWidthOverride; | ||||
519 | |||||
520 | /// Resolved preferred vector width from function attribute and subtarget | ||||
521 | /// features. | ||||
522 | unsigned PreferVectorWidth = UINT32_MAX(4294967295U); | ||||
523 | |||||
524 | /// Required vector width from function attribute. | ||||
525 | unsigned RequiredVectorWidth; | ||||
526 | |||||
527 | /// True if compiling for 64-bit, false for 16-bit or 32-bit. | ||||
528 | bool In64BitMode = false; | ||||
529 | |||||
530 | /// True if compiling for 32-bit, false for 16-bit or 64-bit. | ||||
531 | bool In32BitMode = false; | ||||
532 | |||||
533 | /// True if compiling for 16-bit, false for 32-bit or 64-bit. | ||||
534 | bool In16BitMode = false; | ||||
535 | |||||
536 | X86SelectionDAGInfo TSInfo; | ||||
537 | // Ordering here is important. X86InstrInfo initializes X86RegisterInfo which | ||||
538 | // X86TargetLowering needs. | ||||
539 | X86InstrInfo InstrInfo; | ||||
540 | X86TargetLowering TLInfo; | ||||
541 | X86FrameLowering FrameLowering; | ||||
542 | |||||
543 | public: | ||||
544 | /// This constructor initializes the data members to match that | ||||
545 | /// of the specified triple. | ||||
546 | /// | ||||
547 | X86Subtarget(const Triple &TT, StringRef CPU, StringRef TuneCPU, StringRef FS, | ||||
548 | const X86TargetMachine &TM, MaybeAlign StackAlignOverride, | ||||
549 | unsigned PreferVectorWidthOverride, | ||||
550 | unsigned RequiredVectorWidth); | ||||
551 | |||||
552 | const X86TargetLowering *getTargetLowering() const override { | ||||
553 | return &TLInfo; | ||||
554 | } | ||||
555 | |||||
556 | const X86InstrInfo *getInstrInfo() const override { return &InstrInfo; } | ||||
557 | |||||
558 | const X86FrameLowering *getFrameLowering() const override { | ||||
559 | return &FrameLowering; | ||||
560 | } | ||||
561 | |||||
562 | const X86SelectionDAGInfo *getSelectionDAGInfo() const override { | ||||
563 | return &TSInfo; | ||||
564 | } | ||||
565 | |||||
566 | const X86RegisterInfo *getRegisterInfo() const override { | ||||
567 | return &getInstrInfo()->getRegisterInfo(); | ||||
568 | } | ||||
569 | |||||
570 | unsigned getTileConfigSize() const { return 64; } | ||||
571 | Align getTileConfigAlignment() const { return TileConfigAlignment; } | ||||
572 | |||||
573 | /// Returns the minimum alignment known to hold of the | ||||
574 | /// stack frame on entry to the function and which must be maintained by every | ||||
575 | /// function for this subtarget. | ||||
576 | Align getStackAlignment() const { return stackAlignment; } | ||||
577 | |||||
578 | /// Returns the maximum memset / memcpy size | ||||
579 | /// that still makes it profitable to inline the call. | ||||
580 | unsigned getMaxInlineSizeThreshold() const { return MaxInlineSizeThreshold; } | ||||
581 | |||||
582 | /// ParseSubtargetFeatures - Parses features string setting specified | ||||
583 | /// subtarget options. Definition of function is auto generated by tblgen. | ||||
584 | void ParseSubtargetFeatures(StringRef CPU, StringRef TuneCPU, StringRef FS); | ||||
585 | |||||
586 | /// Methods used by Global ISel | ||||
587 | const CallLowering *getCallLowering() const override; | ||||
588 | InstructionSelector *getInstructionSelector() const override; | ||||
589 | const LegalizerInfo *getLegalizerInfo() const override; | ||||
590 | const RegisterBankInfo *getRegBankInfo() const override; | ||||
591 | |||||
592 | private: | ||||
593 | /// Initialize the full set of dependencies so we can use an initializer | ||||
594 | /// list for X86Subtarget. | ||||
595 | X86Subtarget &initializeSubtargetDependencies(StringRef CPU, | ||||
596 | StringRef TuneCPU, | ||||
597 | StringRef FS); | ||||
598 | void initSubtargetFeatures(StringRef CPU, StringRef TuneCPU, StringRef FS); | ||||
599 | |||||
600 | public: | ||||
601 | /// Is this x86_64? (disregarding specific ABI / programming model) | ||||
602 | bool is64Bit() const { | ||||
603 | return In64BitMode; | ||||
604 | } | ||||
605 | |||||
606 | bool is32Bit() const { | ||||
607 | return In32BitMode; | ||||
608 | } | ||||
609 | |||||
610 | bool is16Bit() const { | ||||
611 | return In16BitMode; | ||||
612 | } | ||||
613 | |||||
614 | /// Is this x86_64 with the ILP32 programming model (x32 ABI)? | ||||
615 | bool isTarget64BitILP32() const { | ||||
616 | return In64BitMode && (TargetTriple.isX32() || TargetTriple.isOSNaCl()); | ||||
617 | } | ||||
618 | |||||
619 | /// Is this x86_64 with the LP64 programming model (standard AMD64, no x32)? | ||||
620 | bool isTarget64BitLP64() const { | ||||
621 | return In64BitMode && (!TargetTriple.isX32() && !TargetTriple.isOSNaCl()); | ||||
622 | } | ||||
623 | |||||
624 | PICStyles::Style getPICStyle() const { return PICStyle; } | ||||
625 | void setPICStyle(PICStyles::Style Style) { PICStyle = Style; } | ||||
626 | |||||
627 | bool hasX87() const { return HasX87; } | ||||
628 | bool hasCmpxchg8b() const { return HasCmpxchg8b; } | ||||
629 | bool hasNOPL() const { return HasNOPL; } | ||||
630 | // SSE codegen depends on cmovs, and all SSE1+ processors support them. | ||||
631 | // All 64-bit processors support cmov. | ||||
632 | bool hasCMov() const { return HasCMov || X86SSELevel >= SSE1 || is64Bit(); } | ||||
633 | bool hasSSE1() const { return X86SSELevel >= SSE1; } | ||||
634 | bool hasSSE2() const { return X86SSELevel >= SSE2; } | ||||
635 | bool hasSSE3() const { return X86SSELevel >= SSE3; } | ||||
636 | bool hasSSSE3() const { return X86SSELevel >= SSSE3; } | ||||
637 | bool hasSSE41() const { return X86SSELevel >= SSE41; } | ||||
638 | bool hasSSE42() const { return X86SSELevel >= SSE42; } | ||||
639 | bool hasAVX() const { return X86SSELevel >= AVX; } | ||||
640 | bool hasAVX2() const { return X86SSELevel
| ||||
641 | bool hasAVX512() const { return X86SSELevel >= AVX512F; } | ||||
642 | bool hasInt256() const { return hasAVX2(); } | ||||
643 | bool hasSSE4A() const { return HasSSE4A; } | ||||
644 | bool hasMMX() const { return X863DNowLevel >= MMX; } | ||||
645 | bool has3DNow() const { return X863DNowLevel >= ThreeDNow; } | ||||
646 | bool has3DNowA() const { return X863DNowLevel >= ThreeDNowA; } | ||||
647 | bool hasPOPCNT() const { return HasPOPCNT; } | ||||
648 | bool hasAES() const { return HasAES; } | ||||
649 | bool hasVAES() const { return HasVAES; } | ||||
650 | bool hasFXSR() const { return HasFXSR; } | ||||
651 | bool hasXSAVE() const { return HasXSAVE; } | ||||
652 | bool hasXSAVEOPT() const { return HasXSAVEOPT; } | ||||
653 | bool hasXSAVEC() const { return HasXSAVEC; } | ||||
654 | bool hasXSAVES() const { return HasXSAVES; } | ||||
655 | bool hasPCLMUL() const { return HasPCLMUL; } | ||||
656 | bool hasVPCLMULQDQ() const { return HasVPCLMULQDQ; } | ||||
657 | bool hasGFNI() const { return HasGFNI; } | ||||
658 | // Prefer FMA4 to FMA - its better for commutation/memory folding and | ||||
659 | // has equal or better performance on all supported targets. | ||||
660 | bool hasFMA() const { return HasFMA; } | ||||
661 | bool hasFMA4() const { return HasFMA4; } | ||||
662 | bool hasAnyFMA() const { return hasFMA() || hasFMA4(); } | ||||
663 | bool hasXOP() const { return HasXOP; } | ||||
664 | bool hasTBM() const { return HasTBM; } | ||||
665 | bool hasLWP() const { return HasLWP; } | ||||
666 | bool hasMOVBE() const { return HasMOVBE; } | ||||
667 | bool hasRDRAND() const { return HasRDRAND; } | ||||
668 | bool hasF16C() const { return HasF16C; } | ||||
669 | bool hasFSGSBase() const { return HasFSGSBase; } | ||||
670 | bool hasLZCNT() const { return HasLZCNT; } | ||||
671 | bool hasBMI() const { return HasBMI; } | ||||
672 | bool hasBMI2() const { return HasBMI2; } | ||||
673 | bool hasVBMI() const { return HasVBMI; } | ||||
674 | bool hasVBMI2() const { return HasVBMI2; } | ||||
675 | bool hasIFMA() const { return HasIFMA; } | ||||
676 | bool hasRTM() const { return HasRTM; } | ||||
677 | bool hasADX() const { return HasADX; } | ||||
678 | bool hasSHA() const { return HasSHA; } | ||||
679 | bool hasPRFCHW() const { return HasPRFCHW; } | ||||
680 | bool hasPREFETCHWT1() const { return HasPREFETCHWT1; } | ||||
681 | bool hasPrefetchW() const { | ||||
682 | // The PREFETCHW instruction was added with 3DNow but later CPUs gave it | ||||
683 | // its own CPUID bit as part of deprecating 3DNow. Intel eventually added | ||||
684 | // it and KNL has another that prefetches to L2 cache. We assume the | ||||
685 | // L1 version exists if the L2 version does. | ||||
686 | return has3DNow() || hasPRFCHW() || hasPREFETCHWT1(); | ||||
687 | } | ||||
688 | bool hasSSEPrefetch() const { | ||||
689 | // We implicitly enable these when we have a write prefix supporting cache | ||||
690 | // level OR if we have prfchw, but don't already have a read prefetch from | ||||
691 | // 3dnow. | ||||
692 | return hasSSE1() || (hasPRFCHW() && !has3DNow()) || hasPREFETCHWT1(); | ||||
693 | } | ||||
694 | bool hasRDSEED() const { return HasRDSEED; } | ||||
695 | bool hasLAHFSAHF() const { return HasLAHFSAHF64 || !is64Bit(); } | ||||
696 | bool hasMWAITX() const { return HasMWAITX; } | ||||
697 | bool hasCLZERO() const { return HasCLZERO; } | ||||
698 | bool hasCLDEMOTE() const { return HasCLDEMOTE; } | ||||
699 | bool hasMOVDIRI() const { return HasMOVDIRI; } | ||||
700 | bool hasMOVDIR64B() const { return HasMOVDIR64B; } | ||||
701 | bool hasPTWRITE() const { return HasPTWRITE; } | ||||
702 | bool isSHLDSlow() const { return IsSHLDSlow; } | ||||
703 | bool isPMULLDSlow() const { return IsPMULLDSlow; } | ||||
704 | bool isPMADDWDSlow() const { return IsPMADDWDSlow; } | ||||
705 | bool isUnalignedMem16Slow() const { return IsUAMem16Slow; } | ||||
706 | bool isUnalignedMem32Slow() const { return IsUAMem32Slow; } | ||||
707 | bool hasSSEUnalignedMem() const { return HasSSEUnalignedMem; } | ||||
708 | bool hasCmpxchg16b() const { return HasCmpxchg16b && is64Bit(); } | ||||
709 | bool useLeaForSP() const { return UseLeaForSP; } | ||||
710 | bool hasPOPCNTFalseDeps() const { return HasPOPCNTFalseDeps; } | ||||
711 | bool hasLZCNTFalseDeps() const { return HasLZCNTFalseDeps; } | ||||
712 | bool hasFastVariableCrossLaneShuffle() const { | ||||
713 | return HasFastVariableCrossLaneShuffle; | ||||
714 | } | ||||
715 | bool hasFastVariablePerLaneShuffle() const { | ||||
716 | return HasFastVariablePerLaneShuffle; | ||||
717 | } | ||||
718 | bool insertVZEROUPPER() const { return InsertVZEROUPPER; } | ||||
719 | bool hasFastGather() const { return HasFastGather; } | ||||
720 | bool hasFastScalarFSQRT() const { return HasFastScalarFSQRT; } | ||||
721 | bool hasFastVectorFSQRT() const { return HasFastVectorFSQRT; } | ||||
722 | bool hasFastLZCNT() const { return HasFastLZCNT; } | ||||
723 | bool hasFastSHLDRotate() const { return HasFastSHLDRotate; } | ||||
724 | bool hasFastBEXTR() const { return HasFastBEXTR; } | ||||
725 | bool hasFastHorizontalOps() const { return HasFastHorizontalOps; } | ||||
726 | bool hasFastScalarShiftMasks() const { return HasFastScalarShiftMasks; } | ||||
727 | bool hasFastVectorShiftMasks() const { return HasFastVectorShiftMasks; } | ||||
728 | bool hasFastMOVBE() const { return HasFastMOVBE; } | ||||
729 | bool hasMacroFusion() const { return HasMacroFusion; } | ||||
730 | bool hasBranchFusion() const { return HasBranchFusion; } | ||||
731 | bool hasERMSB() const { return HasERMSB; } | ||||
732 | bool hasFSRM() const { return HasFSRM; } | ||||
733 | bool hasSlowDivide32() const { return HasSlowDivide32; } | ||||
734 | bool hasSlowDivide64() const { return HasSlowDivide64; } | ||||
735 | bool padShortFunctions() const { return PadShortFunctions; } | ||||
736 | bool slowTwoMemOps() const { return SlowTwoMemOps; } | ||||
737 | bool LEAusesAG() const { return LEAUsesAG; } | ||||
738 | bool slowLEA() const { return SlowLEA; } | ||||
739 | bool slow3OpsLEA() const { return Slow3OpsLEA; } | ||||
740 | bool slowIncDec() const { return SlowIncDec; } | ||||
741 | bool hasCDI() const { return HasCDI; } | ||||
742 | bool hasVPOPCNTDQ() const { return HasVPOPCNTDQ; } | ||||
743 | bool hasPFI() const { return HasPFI; } | ||||
744 | bool hasERI() const { return HasERI; } | ||||
745 | bool hasDQI() const { return HasDQI; } | ||||
746 | bool hasBWI() const { return HasBWI; } | ||||
747 | bool hasVLX() const { return HasVLX; } | ||||
748 | bool hasFP16() const { return HasFP16; } | ||||
749 | bool hasPKU() const { return HasPKU; } | ||||
750 | bool hasVNNI() const { return HasVNNI; } | ||||
751 | bool hasBF16() const { return HasBF16; } | ||||
752 | bool hasVP2INTERSECT() const { return HasVP2INTERSECT; } | ||||
753 | bool hasBITALG() const { return HasBITALG; } | ||||
754 | bool hasSHSTK() const { return HasSHSTK; } | ||||
755 | bool hasCLFLUSHOPT() const { return HasCLFLUSHOPT; } | ||||
756 | bool hasCLWB() const { return HasCLWB; } | ||||
757 | bool hasWBNOINVD() const { return HasWBNOINVD; } | ||||
758 | bool hasRDPID() const { return HasRDPID; } | ||||
759 | bool hasWAITPKG() const { return HasWAITPKG; } | ||||
760 | bool hasPCONFIG() const { return HasPCONFIG; } | ||||
761 | bool hasSGX() const { return HasSGX; } | ||||
762 | bool hasINVPCID() const { return HasINVPCID; } | ||||
763 | bool hasENQCMD() const { return HasENQCMD; } | ||||
764 | bool hasKL() const { return HasKL; } | ||||
765 | bool hasWIDEKL() const { return HasWIDEKL; } | ||||
766 | bool hasHRESET() const { return HasHRESET; } | ||||
767 | bool hasSERIALIZE() const { return HasSERIALIZE; } | ||||
768 | bool hasTSXLDTRK() const { return HasTSXLDTRK; } | ||||
769 | bool hasUINTR() const { return HasUINTR; } | ||||
770 | bool useRetpolineIndirectCalls() const { return UseRetpolineIndirectCalls; } | ||||
771 | bool useRetpolineIndirectBranches() const { | ||||
772 | return UseRetpolineIndirectBranches; | ||||
773 | } | ||||
774 | bool hasAVXVNNI() const { return HasAVXVNNI; } | ||||
775 | bool hasAMXTILE() const { return HasAMXTILE; } | ||||
776 | bool hasAMXBF16() const { return HasAMXBF16; } | ||||
777 | bool hasAMXINT8() const { return HasAMXINT8; } | ||||
778 | bool useRetpolineExternalThunk() const { return UseRetpolineExternalThunk; } | ||||
779 | |||||
780 | // These are generic getters that OR together all of the thunk types | ||||
781 | // supported by the subtarget. Therefore useIndirectThunk*() will return true | ||||
782 | // if any respective thunk feature is enabled. | ||||
783 | bool useIndirectThunkCalls() const { | ||||
784 | return useRetpolineIndirectCalls() || useLVIControlFlowIntegrity(); | ||||
785 | } | ||||
786 | bool useIndirectThunkBranches() const { | ||||
787 | return useRetpolineIndirectBranches() || useLVIControlFlowIntegrity(); | ||||
788 | } | ||||
789 | |||||
790 | bool preferMaskRegisters() const { return PreferMaskRegisters; } | ||||
791 | bool useGLMDivSqrtCosts() const { return UseGLMDivSqrtCosts; } | ||||
792 | bool useLVIControlFlowIntegrity() const { return UseLVIControlFlowIntegrity; } | ||||
793 | bool useLVILoadHardening() const { return UseLVILoadHardening; } | ||||
794 | bool useSpeculativeExecutionSideEffectSuppression() const { | ||||
795 | return UseSpeculativeExecutionSideEffectSuppression; | ||||
796 | } | ||||
797 | |||||
798 | unsigned getPreferVectorWidth() const { return PreferVectorWidth; } | ||||
799 | unsigned getRequiredVectorWidth() const { return RequiredVectorWidth; } | ||||
800 | |||||
801 | // Helper functions to determine when we should allow widening to 512-bit | ||||
802 | // during codegen. | ||||
803 | // TODO: Currently we're always allowing widening on CPUs without VLX, | ||||
804 | // because for many cases we don't have a better option. | ||||
805 | bool canExtendTo512DQ() const { | ||||
806 | return hasAVX512() && (!hasVLX() || getPreferVectorWidth() >= 512); | ||||
807 | } | ||||
808 | bool canExtendTo512BW() const { | ||||
809 | return hasBWI() && canExtendTo512DQ(); | ||||
810 | } | ||||
811 | |||||
812 | // If there are no 512-bit vectors and we prefer not to use 512-bit registers, | ||||
813 | // disable them in the legalizer. | ||||
814 | bool useAVX512Regs() const { | ||||
815 | return hasAVX512() && (canExtendTo512DQ() || RequiredVectorWidth > 256); | ||||
816 | } | ||||
817 | |||||
818 | bool useBWIRegs() const { | ||||
819 | return hasBWI() && useAVX512Regs(); | ||||
820 | } | ||||
821 | |||||
822 | bool isXRaySupported() const override { return is64Bit(); } | ||||
823 | |||||
824 | /// TODO: to be removed later and replaced with suitable properties | ||||
825 | bool isAtom() const { return X86ProcFamily == IntelAtom; } | ||||
826 | bool isSLM() const { return X86ProcFamily == IntelSLM; } | ||||
827 | bool useSoftFloat() const { return UseSoftFloat; } | ||||
828 | bool useAA() const override { return UseAA; } | ||||
829 | |||||
830 | /// Use mfence if we have SSE2 or we're on x86-64 (even if we asked for | ||||
831 | /// no-sse2). There isn't any reason to disable it if the target processor | ||||
832 | /// supports it. | ||||
833 | bool hasMFence() const { return hasSSE2() || is64Bit(); } | ||||
834 | |||||
835 | const Triple &getTargetTriple() const { return TargetTriple; } | ||||
836 | |||||
837 | bool isTargetDarwin() const { return TargetTriple.isOSDarwin(); } | ||||
838 | bool isTargetFreeBSD() const { return TargetTriple.isOSFreeBSD(); } | ||||
839 | bool isTargetDragonFly() const { return TargetTriple.isOSDragonFly(); } | ||||
840 | bool isTargetSolaris() const { return TargetTriple.isOSSolaris(); } | ||||
841 | bool isTargetPS4() const { return TargetTriple.isPS4CPU(); } | ||||
842 | |||||
843 | bool isTargetELF() const { return TargetTriple.isOSBinFormatELF(); } | ||||
844 | bool isTargetCOFF() const { return TargetTriple.isOSBinFormatCOFF(); } | ||||
845 | bool isTargetMachO() const { return TargetTriple.isOSBinFormatMachO(); } | ||||
846 | |||||
847 | bool isTargetLinux() const { return TargetTriple.isOSLinux(); } | ||||
848 | bool isTargetKFreeBSD() const { return TargetTriple.isOSKFreeBSD(); } | ||||
849 | bool isTargetGlibc() const { return TargetTriple.isOSGlibc(); } | ||||
850 | bool isTargetAndroid() const { return TargetTriple.isAndroid(); } | ||||
851 | bool isTargetNaCl() const { return TargetTriple.isOSNaCl(); } | ||||
852 | bool isTargetNaCl32() const { return isTargetNaCl() && !is64Bit(); } | ||||
853 | bool isTargetNaCl64() const { return isTargetNaCl() && is64Bit(); } | ||||
854 | bool isTargetMCU() const { return TargetTriple.isOSIAMCU(); } | ||||
855 | bool isTargetFuchsia() const { return TargetTriple.isOSFuchsia(); } | ||||
856 | |||||
857 | bool isTargetWindowsMSVC() const { | ||||
858 | return TargetTriple.isWindowsMSVCEnvironment(); | ||||
859 | } | ||||
860 | |||||
861 | bool isTargetWindowsCoreCLR() const { | ||||
862 | return TargetTriple.isWindowsCoreCLREnvironment(); | ||||
863 | } | ||||
864 | |||||
865 | bool isTargetWindowsCygwin() const { | ||||
866 | return TargetTriple.isWindowsCygwinEnvironment(); | ||||
867 | } | ||||
868 | |||||
869 | bool isTargetWindowsGNU() const { | ||||
870 | return TargetTriple.isWindowsGNUEnvironment(); | ||||
871 | } | ||||
872 | |||||
873 | bool isTargetWindowsItanium() const { | ||||
874 | return TargetTriple.isWindowsItaniumEnvironment(); | ||||
875 | } | ||||
876 | |||||
877 | bool isTargetCygMing() const { return TargetTriple.isOSCygMing(); } | ||||
878 | |||||
879 | bool isOSWindows() const { return TargetTriple.isOSWindows(); } | ||||
880 | |||||
881 | bool isTargetWin64() const { return In64BitMode && isOSWindows(); } | ||||
882 | |||||
883 | bool isTargetWin32() const { return !In64BitMode && isOSWindows(); } | ||||
884 | |||||
885 | bool isPICStyleGOT() const { return PICStyle == PICStyles::Style::GOT; } | ||||
886 | bool isPICStyleRIPRel() const { return PICStyle == PICStyles::Style::RIPRel; } | ||||
887 | |||||
888 | bool isPICStyleStubPIC() const { | ||||
889 | return PICStyle == PICStyles::Style::StubPIC; | ||||
890 | } | ||||
891 | |||||
892 | bool isPositionIndependent() const; | ||||
893 | |||||
894 | bool isCallingConvWin64(CallingConv::ID CC) const { | ||||
895 | switch (CC) { | ||||
896 | // On Win64, all these conventions just use the default convention. | ||||
897 | case CallingConv::C: | ||||
898 | case CallingConv::Fast: | ||||
899 | case CallingConv::Tail: | ||||
900 | case CallingConv::Swift: | ||||
901 | case CallingConv::SwiftTail: | ||||
902 | case CallingConv::X86_FastCall: | ||||
903 | case CallingConv::X86_StdCall: | ||||
904 | case CallingConv::X86_ThisCall: | ||||
905 | case CallingConv::X86_VectorCall: | ||||
906 | case CallingConv::Intel_OCL_BI: | ||||
907 | return isTargetWin64(); | ||||
908 | // This convention allows using the Win64 convention on other targets. | ||||
909 | case CallingConv::Win64: | ||||
910 | return true; | ||||
911 | // This convention allows using the SysV convention on Windows targets. | ||||
912 | case CallingConv::X86_64_SysV: | ||||
913 | return false; | ||||
914 | // Otherwise, who knows what this is. | ||||
915 | default: | ||||
916 | return false; | ||||
917 | } | ||||
918 | } | ||||
919 | |||||
920 | /// Classify a global variable reference for the current subtarget according | ||||
921 | /// to how we should reference it in a non-pcrel context. | ||||
922 | unsigned char classifyLocalReference(const GlobalValue *GV) const; | ||||
923 | |||||
924 | unsigned char classifyGlobalReference(const GlobalValue *GV, | ||||
925 | const Module &M) const; | ||||
926 | unsigned char classifyGlobalReference(const GlobalValue *GV) const; | ||||
927 | |||||
928 | /// Classify a global function reference for the current subtarget. | ||||
929 | unsigned char classifyGlobalFunctionReference(const GlobalValue *GV, | ||||
930 | const Module &M) const; | ||||
931 | unsigned char classifyGlobalFunctionReference(const GlobalValue *GV) const; | ||||
932 | |||||
933 | /// Classify a blockaddress reference for the current subtarget according to | ||||
934 | /// how we should reference it in a non-pcrel context. | ||||
935 | unsigned char classifyBlockAddressReference() const; | ||||
936 | |||||
937 | /// Return true if the subtarget allows calls to immediate address. | ||||
938 | bool isLegalToCallImmediateAddr() const; | ||||
939 | |||||
940 | /// If we are using indirect thunks, we need to expand indirectbr to avoid it | ||||
941 | /// lowering to an actual indirect jump. | ||||
942 | bool enableIndirectBrExpand() const override { | ||||
943 | return useIndirectThunkBranches(); | ||||
944 | } | ||||
945 | |||||
946 | /// Enable the MachineScheduler pass for all X86 subtargets. | ||||
947 | bool enableMachineScheduler() const override { return true; } | ||||
948 | |||||
949 | bool enableEarlyIfConversion() const override; | ||||
950 | |||||
951 | void getPostRAMutations(std::vector<std::unique_ptr<ScheduleDAGMutation>> | ||||
952 | &Mutations) const override; | ||||
953 | |||||
954 | AntiDepBreakMode getAntiDepBreakMode() const override { | ||||
955 | return TargetSubtargetInfo::ANTIDEP_CRITICAL; | ||||
956 | } | ||||
957 | |||||
958 | bool enableAdvancedRASplitCost() const override { return false; } | ||||
959 | }; | ||||
960 | |||||
961 | } // end namespace llvm | ||||
962 | |||||
963 | #endif // LLVM_LIB_TARGET_X86_X86SUBTARGET_H |