File: | build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/llvm/lib/Target/ARM/ARMISelLowering.cpp |
Warning: | line 2667, column 20 Called C++ object pointer is null |
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1 | //===- ARMISelLowering.cpp - ARM 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 ARM uses to lower LLVM code into a | ||||
10 | // selection DAG. | ||||
11 | // | ||||
12 | //===----------------------------------------------------------------------===// | ||||
13 | |||||
14 | #include "ARMISelLowering.h" | ||||
15 | #include "ARMBaseInstrInfo.h" | ||||
16 | #include "ARMBaseRegisterInfo.h" | ||||
17 | #include "ARMCallingConv.h" | ||||
18 | #include "ARMConstantPoolValue.h" | ||||
19 | #include "ARMMachineFunctionInfo.h" | ||||
20 | #include "ARMPerfectShuffle.h" | ||||
21 | #include "ARMRegisterInfo.h" | ||||
22 | #include "ARMSelectionDAGInfo.h" | ||||
23 | #include "ARMSubtarget.h" | ||||
24 | #include "ARMTargetTransformInfo.h" | ||||
25 | #include "MCTargetDesc/ARMAddressingModes.h" | ||||
26 | #include "MCTargetDesc/ARMBaseInfo.h" | ||||
27 | #include "Utils/ARMBaseInfo.h" | ||||
28 | #include "llvm/ADT/APFloat.h" | ||||
29 | #include "llvm/ADT/APInt.h" | ||||
30 | #include "llvm/ADT/ArrayRef.h" | ||||
31 | #include "llvm/ADT/BitVector.h" | ||||
32 | #include "llvm/ADT/DenseMap.h" | ||||
33 | #include "llvm/ADT/STLExtras.h" | ||||
34 | #include "llvm/ADT/SmallPtrSet.h" | ||||
35 | #include "llvm/ADT/SmallVector.h" | ||||
36 | #include "llvm/ADT/Statistic.h" | ||||
37 | #include "llvm/ADT/StringExtras.h" | ||||
38 | #include "llvm/ADT/StringRef.h" | ||||
39 | #include "llvm/ADT/StringSwitch.h" | ||||
40 | #include "llvm/ADT/Triple.h" | ||||
41 | #include "llvm/ADT/Twine.h" | ||||
42 | #include "llvm/Analysis/VectorUtils.h" | ||||
43 | #include "llvm/CodeGen/CallingConvLower.h" | ||||
44 | #include "llvm/CodeGen/ISDOpcodes.h" | ||||
45 | #include "llvm/CodeGen/IntrinsicLowering.h" | ||||
46 | #include "llvm/CodeGen/MachineBasicBlock.h" | ||||
47 | #include "llvm/CodeGen/MachineConstantPool.h" | ||||
48 | #include "llvm/CodeGen/MachineFrameInfo.h" | ||||
49 | #include "llvm/CodeGen/MachineFunction.h" | ||||
50 | #include "llvm/CodeGen/MachineInstr.h" | ||||
51 | #include "llvm/CodeGen/MachineInstrBuilder.h" | ||||
52 | #include "llvm/CodeGen/MachineJumpTableInfo.h" | ||||
53 | #include "llvm/CodeGen/MachineMemOperand.h" | ||||
54 | #include "llvm/CodeGen/MachineOperand.h" | ||||
55 | #include "llvm/CodeGen/MachineRegisterInfo.h" | ||||
56 | #include "llvm/CodeGen/RuntimeLibcalls.h" | ||||
57 | #include "llvm/CodeGen/SelectionDAG.h" | ||||
58 | #include "llvm/CodeGen/SelectionDAGAddressAnalysis.h" | ||||
59 | #include "llvm/CodeGen/SelectionDAGNodes.h" | ||||
60 | #include "llvm/CodeGen/TargetInstrInfo.h" | ||||
61 | #include "llvm/CodeGen/TargetLowering.h" | ||||
62 | #include "llvm/CodeGen/TargetOpcodes.h" | ||||
63 | #include "llvm/CodeGen/TargetRegisterInfo.h" | ||||
64 | #include "llvm/CodeGen/TargetSubtargetInfo.h" | ||||
65 | #include "llvm/CodeGen/ValueTypes.h" | ||||
66 | #include "llvm/IR/Attributes.h" | ||||
67 | #include "llvm/IR/CallingConv.h" | ||||
68 | #include "llvm/IR/Constant.h" | ||||
69 | #include "llvm/IR/Constants.h" | ||||
70 | #include "llvm/IR/DataLayout.h" | ||||
71 | #include "llvm/IR/DebugLoc.h" | ||||
72 | #include "llvm/IR/DerivedTypes.h" | ||||
73 | #include "llvm/IR/Function.h" | ||||
74 | #include "llvm/IR/GlobalAlias.h" | ||||
75 | #include "llvm/IR/GlobalValue.h" | ||||
76 | #include "llvm/IR/GlobalVariable.h" | ||||
77 | #include "llvm/IR/IRBuilder.h" | ||||
78 | #include "llvm/IR/InlineAsm.h" | ||||
79 | #include "llvm/IR/Instruction.h" | ||||
80 | #include "llvm/IR/Instructions.h" | ||||
81 | #include "llvm/IR/IntrinsicInst.h" | ||||
82 | #include "llvm/IR/Intrinsics.h" | ||||
83 | #include "llvm/IR/IntrinsicsARM.h" | ||||
84 | #include "llvm/IR/Module.h" | ||||
85 | #include "llvm/IR/PatternMatch.h" | ||||
86 | #include "llvm/IR/Type.h" | ||||
87 | #include "llvm/IR/User.h" | ||||
88 | #include "llvm/IR/Value.h" | ||||
89 | #include "llvm/MC/MCInstrDesc.h" | ||||
90 | #include "llvm/MC/MCInstrItineraries.h" | ||||
91 | #include "llvm/MC/MCRegisterInfo.h" | ||||
92 | #include "llvm/MC/MCSchedule.h" | ||||
93 | #include "llvm/Support/AtomicOrdering.h" | ||||
94 | #include "llvm/Support/BranchProbability.h" | ||||
95 | #include "llvm/Support/Casting.h" | ||||
96 | #include "llvm/Support/CodeGen.h" | ||||
97 | #include "llvm/Support/CommandLine.h" | ||||
98 | #include "llvm/Support/Compiler.h" | ||||
99 | #include "llvm/Support/Debug.h" | ||||
100 | #include "llvm/Support/ErrorHandling.h" | ||||
101 | #include "llvm/Support/KnownBits.h" | ||||
102 | #include "llvm/Support/MachineValueType.h" | ||||
103 | #include "llvm/Support/MathExtras.h" | ||||
104 | #include "llvm/Support/raw_ostream.h" | ||||
105 | #include "llvm/Target/TargetMachine.h" | ||||
106 | #include "llvm/Target/TargetOptions.h" | ||||
107 | #include <algorithm> | ||||
108 | #include <cassert> | ||||
109 | #include <cstdint> | ||||
110 | #include <cstdlib> | ||||
111 | #include <iterator> | ||||
112 | #include <limits> | ||||
113 | #include <string> | ||||
114 | #include <tuple> | ||||
115 | #include <utility> | ||||
116 | #include <vector> | ||||
117 | |||||
118 | using namespace llvm; | ||||
119 | using namespace llvm::PatternMatch; | ||||
120 | |||||
121 | #define DEBUG_TYPE"arm-isel" "arm-isel" | ||||
122 | |||||
123 | STATISTIC(NumTailCalls, "Number of tail calls")static llvm::Statistic NumTailCalls = {"arm-isel", "NumTailCalls" , "Number of tail calls"}; | ||||
124 | STATISTIC(NumMovwMovt, "Number of GAs materialized with movw + movt")static llvm::Statistic NumMovwMovt = {"arm-isel", "NumMovwMovt" , "Number of GAs materialized with movw + movt"}; | ||||
125 | STATISTIC(NumLoopByVals, "Number of loops generated for byval arguments")static llvm::Statistic NumLoopByVals = {"arm-isel", "NumLoopByVals" , "Number of loops generated for byval arguments"}; | ||||
126 | STATISTIC(NumConstpoolPromoted,static llvm::Statistic NumConstpoolPromoted = {"arm-isel", "NumConstpoolPromoted" , "Number of constants with their storage promoted into constant pools" } | ||||
127 | "Number of constants with their storage promoted into constant pools")static llvm::Statistic NumConstpoolPromoted = {"arm-isel", "NumConstpoolPromoted" , "Number of constants with their storage promoted into constant pools" }; | ||||
128 | |||||
129 | static cl::opt<bool> | ||||
130 | ARMInterworking("arm-interworking", cl::Hidden, | ||||
131 | cl::desc("Enable / disable ARM interworking (for debugging only)"), | ||||
132 | cl::init(true)); | ||||
133 | |||||
134 | static cl::opt<bool> EnableConstpoolPromotion( | ||||
135 | "arm-promote-constant", cl::Hidden, | ||||
136 | cl::desc("Enable / disable promotion of unnamed_addr constants into " | ||||
137 | "constant pools"), | ||||
138 | cl::init(false)); // FIXME: set to true by default once PR32780 is fixed | ||||
139 | static cl::opt<unsigned> ConstpoolPromotionMaxSize( | ||||
140 | "arm-promote-constant-max-size", cl::Hidden, | ||||
141 | cl::desc("Maximum size of constant to promote into a constant pool"), | ||||
142 | cl::init(64)); | ||||
143 | static cl::opt<unsigned> ConstpoolPromotionMaxTotal( | ||||
144 | "arm-promote-constant-max-total", cl::Hidden, | ||||
145 | cl::desc("Maximum size of ALL constants to promote into a constant pool"), | ||||
146 | cl::init(128)); | ||||
147 | |||||
148 | cl::opt<unsigned> | ||||
149 | MVEMaxSupportedInterleaveFactor("mve-max-interleave-factor", cl::Hidden, | ||||
150 | cl::desc("Maximum interleave factor for MVE VLDn to generate."), | ||||
151 | cl::init(2)); | ||||
152 | |||||
153 | // The APCS parameter registers. | ||||
154 | static const MCPhysReg GPRArgRegs[] = { | ||||
155 | ARM::R0, ARM::R1, ARM::R2, ARM::R3 | ||||
156 | }; | ||||
157 | |||||
158 | void ARMTargetLowering::addTypeForNEON(MVT VT, MVT PromotedLdStVT) { | ||||
159 | if (VT != PromotedLdStVT) { | ||||
160 | setOperationAction(ISD::LOAD, VT, Promote); | ||||
161 | AddPromotedToType (ISD::LOAD, VT, PromotedLdStVT); | ||||
162 | |||||
163 | setOperationAction(ISD::STORE, VT, Promote); | ||||
164 | AddPromotedToType (ISD::STORE, VT, PromotedLdStVT); | ||||
165 | } | ||||
166 | |||||
167 | MVT ElemTy = VT.getVectorElementType(); | ||||
168 | if (ElemTy != MVT::f64) | ||||
169 | setOperationAction(ISD::SETCC, VT, Custom); | ||||
170 | setOperationAction(ISD::INSERT_VECTOR_ELT, VT, Custom); | ||||
171 | setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Custom); | ||||
172 | if (ElemTy == MVT::i32) { | ||||
173 | setOperationAction(ISD::SINT_TO_FP, VT, Custom); | ||||
174 | setOperationAction(ISD::UINT_TO_FP, VT, Custom); | ||||
175 | setOperationAction(ISD::FP_TO_SINT, VT, Custom); | ||||
176 | setOperationAction(ISD::FP_TO_UINT, VT, Custom); | ||||
177 | } else { | ||||
178 | setOperationAction(ISD::SINT_TO_FP, VT, Expand); | ||||
179 | setOperationAction(ISD::UINT_TO_FP, VT, Expand); | ||||
180 | setOperationAction(ISD::FP_TO_SINT, VT, Expand); | ||||
181 | setOperationAction(ISD::FP_TO_UINT, VT, Expand); | ||||
182 | } | ||||
183 | setOperationAction(ISD::BUILD_VECTOR, VT, Custom); | ||||
184 | setOperationAction(ISD::VECTOR_SHUFFLE, VT, Custom); | ||||
185 | setOperationAction(ISD::CONCAT_VECTORS, VT, Legal); | ||||
186 | setOperationAction(ISD::EXTRACT_SUBVECTOR, VT, Legal); | ||||
187 | setOperationAction(ISD::SELECT, VT, Expand); | ||||
188 | setOperationAction(ISD::SELECT_CC, VT, Expand); | ||||
189 | setOperationAction(ISD::VSELECT, VT, Expand); | ||||
190 | setOperationAction(ISD::SIGN_EXTEND_INREG, VT, Expand); | ||||
191 | if (VT.isInteger()) { | ||||
192 | setOperationAction(ISD::SHL, VT, Custom); | ||||
193 | setOperationAction(ISD::SRA, VT, Custom); | ||||
194 | setOperationAction(ISD::SRL, VT, Custom); | ||||
195 | } | ||||
196 | |||||
197 | // Neon does not support vector divide/remainder operations. | ||||
198 | setOperationAction(ISD::SDIV, VT, Expand); | ||||
199 | setOperationAction(ISD::UDIV, VT, Expand); | ||||
200 | setOperationAction(ISD::FDIV, VT, Expand); | ||||
201 | setOperationAction(ISD::SREM, VT, Expand); | ||||
202 | setOperationAction(ISD::UREM, VT, Expand); | ||||
203 | setOperationAction(ISD::FREM, VT, Expand); | ||||
204 | setOperationAction(ISD::SDIVREM, VT, Expand); | ||||
205 | setOperationAction(ISD::UDIVREM, VT, Expand); | ||||
206 | |||||
207 | if (!VT.isFloatingPoint() && | ||||
208 | VT != MVT::v2i64 && VT != MVT::v1i64) | ||||
209 | for (auto Opcode : {ISD::ABS, ISD::SMIN, ISD::SMAX, ISD::UMIN, ISD::UMAX}) | ||||
210 | setOperationAction(Opcode, VT, Legal); | ||||
211 | if (!VT.isFloatingPoint()) | ||||
212 | for (auto Opcode : {ISD::SADDSAT, ISD::UADDSAT, ISD::SSUBSAT, ISD::USUBSAT}) | ||||
213 | setOperationAction(Opcode, VT, Legal); | ||||
214 | } | ||||
215 | |||||
216 | void ARMTargetLowering::addDRTypeForNEON(MVT VT) { | ||||
217 | addRegisterClass(VT, &ARM::DPRRegClass); | ||||
218 | addTypeForNEON(VT, MVT::f64); | ||||
219 | } | ||||
220 | |||||
221 | void ARMTargetLowering::addQRTypeForNEON(MVT VT) { | ||||
222 | addRegisterClass(VT, &ARM::DPairRegClass); | ||||
223 | addTypeForNEON(VT, MVT::v2f64); | ||||
224 | } | ||||
225 | |||||
226 | void ARMTargetLowering::setAllExpand(MVT VT) { | ||||
227 | for (unsigned Opc = 0; Opc < ISD::BUILTIN_OP_END; ++Opc) | ||||
228 | setOperationAction(Opc, VT, Expand); | ||||
229 | |||||
230 | // We support these really simple operations even on types where all | ||||
231 | // the actual arithmetic has to be broken down into simpler | ||||
232 | // operations or turned into library calls. | ||||
233 | setOperationAction(ISD::BITCAST, VT, Legal); | ||||
234 | setOperationAction(ISD::LOAD, VT, Legal); | ||||
235 | setOperationAction(ISD::STORE, VT, Legal); | ||||
236 | setOperationAction(ISD::UNDEF, VT, Legal); | ||||
237 | } | ||||
238 | |||||
239 | void ARMTargetLowering::addAllExtLoads(const MVT From, const MVT To, | ||||
240 | LegalizeAction Action) { | ||||
241 | setLoadExtAction(ISD::EXTLOAD, From, To, Action); | ||||
242 | setLoadExtAction(ISD::ZEXTLOAD, From, To, Action); | ||||
243 | setLoadExtAction(ISD::SEXTLOAD, From, To, Action); | ||||
244 | } | ||||
245 | |||||
246 | void ARMTargetLowering::addMVEVectorTypes(bool HasMVEFP) { | ||||
247 | const MVT IntTypes[] = { MVT::v16i8, MVT::v8i16, MVT::v4i32 }; | ||||
248 | |||||
249 | for (auto VT : IntTypes) { | ||||
250 | addRegisterClass(VT, &ARM::MQPRRegClass); | ||||
251 | setOperationAction(ISD::VECTOR_SHUFFLE, VT, Custom); | ||||
252 | setOperationAction(ISD::INSERT_VECTOR_ELT, VT, Custom); | ||||
253 | setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Custom); | ||||
254 | setOperationAction(ISD::BUILD_VECTOR, VT, Custom); | ||||
255 | setOperationAction(ISD::SHL, VT, Custom); | ||||
256 | setOperationAction(ISD::SRA, VT, Custom); | ||||
257 | setOperationAction(ISD::SRL, VT, Custom); | ||||
258 | setOperationAction(ISD::SMIN, VT, Legal); | ||||
259 | setOperationAction(ISD::SMAX, VT, Legal); | ||||
260 | setOperationAction(ISD::UMIN, VT, Legal); | ||||
261 | setOperationAction(ISD::UMAX, VT, Legal); | ||||
262 | setOperationAction(ISD::ABS, VT, Legal); | ||||
263 | setOperationAction(ISD::SETCC, VT, Custom); | ||||
264 | setOperationAction(ISD::MLOAD, VT, Custom); | ||||
265 | setOperationAction(ISD::MSTORE, VT, Legal); | ||||
266 | setOperationAction(ISD::CTLZ, VT, Legal); | ||||
267 | setOperationAction(ISD::CTTZ, VT, Custom); | ||||
268 | setOperationAction(ISD::BITREVERSE, VT, Legal); | ||||
269 | setOperationAction(ISD::BSWAP, VT, Legal); | ||||
270 | setOperationAction(ISD::SADDSAT, VT, Legal); | ||||
271 | setOperationAction(ISD::UADDSAT, VT, Legal); | ||||
272 | setOperationAction(ISD::SSUBSAT, VT, Legal); | ||||
273 | setOperationAction(ISD::USUBSAT, VT, Legal); | ||||
274 | setOperationAction(ISD::ABDS, VT, Legal); | ||||
275 | setOperationAction(ISD::ABDU, VT, Legal); | ||||
276 | setOperationAction(ISD::AVGFLOORS, VT, Legal); | ||||
277 | setOperationAction(ISD::AVGFLOORU, VT, Legal); | ||||
278 | setOperationAction(ISD::AVGCEILS, VT, Legal); | ||||
279 | setOperationAction(ISD::AVGCEILU, VT, Legal); | ||||
280 | |||||
281 | // No native support for these. | ||||
282 | setOperationAction(ISD::UDIV, VT, Expand); | ||||
283 | setOperationAction(ISD::SDIV, VT, Expand); | ||||
284 | setOperationAction(ISD::UREM, VT, Expand); | ||||
285 | setOperationAction(ISD::SREM, VT, Expand); | ||||
286 | setOperationAction(ISD::UDIVREM, VT, Expand); | ||||
287 | setOperationAction(ISD::SDIVREM, VT, Expand); | ||||
288 | setOperationAction(ISD::CTPOP, VT, Expand); | ||||
289 | setOperationAction(ISD::SELECT, VT, Expand); | ||||
290 | setOperationAction(ISD::SELECT_CC, VT, Expand); | ||||
291 | |||||
292 | // Vector reductions | ||||
293 | setOperationAction(ISD::VECREDUCE_ADD, VT, Legal); | ||||
294 | setOperationAction(ISD::VECREDUCE_SMAX, VT, Legal); | ||||
295 | setOperationAction(ISD::VECREDUCE_UMAX, VT, Legal); | ||||
296 | setOperationAction(ISD::VECREDUCE_SMIN, VT, Legal); | ||||
297 | setOperationAction(ISD::VECREDUCE_UMIN, VT, Legal); | ||||
298 | setOperationAction(ISD::VECREDUCE_MUL, VT, Custom); | ||||
299 | setOperationAction(ISD::VECREDUCE_AND, VT, Custom); | ||||
300 | setOperationAction(ISD::VECREDUCE_OR, VT, Custom); | ||||
301 | setOperationAction(ISD::VECREDUCE_XOR, VT, Custom); | ||||
302 | |||||
303 | if (!HasMVEFP) { | ||||
304 | setOperationAction(ISD::SINT_TO_FP, VT, Expand); | ||||
305 | setOperationAction(ISD::UINT_TO_FP, VT, Expand); | ||||
306 | setOperationAction(ISD::FP_TO_SINT, VT, Expand); | ||||
307 | setOperationAction(ISD::FP_TO_UINT, VT, Expand); | ||||
308 | } else { | ||||
309 | setOperationAction(ISD::FP_TO_SINT_SAT, VT, Custom); | ||||
310 | setOperationAction(ISD::FP_TO_UINT_SAT, VT, Custom); | ||||
311 | } | ||||
312 | |||||
313 | // Pre and Post inc are supported on loads and stores | ||||
314 | for (unsigned im = (unsigned)ISD::PRE_INC; | ||||
315 | im != (unsigned)ISD::LAST_INDEXED_MODE; ++im) { | ||||
316 | setIndexedLoadAction(im, VT, Legal); | ||||
317 | setIndexedStoreAction(im, VT, Legal); | ||||
318 | setIndexedMaskedLoadAction(im, VT, Legal); | ||||
319 | setIndexedMaskedStoreAction(im, VT, Legal); | ||||
320 | } | ||||
321 | } | ||||
322 | |||||
323 | const MVT FloatTypes[] = { MVT::v8f16, MVT::v4f32 }; | ||||
324 | for (auto VT : FloatTypes) { | ||||
325 | addRegisterClass(VT, &ARM::MQPRRegClass); | ||||
326 | if (!HasMVEFP) | ||||
327 | setAllExpand(VT); | ||||
328 | |||||
329 | // These are legal or custom whether we have MVE.fp or not | ||||
330 | setOperationAction(ISD::VECTOR_SHUFFLE, VT, Custom); | ||||
331 | setOperationAction(ISD::INSERT_VECTOR_ELT, VT, Custom); | ||||
332 | setOperationAction(ISD::INSERT_VECTOR_ELT, VT.getVectorElementType(), Custom); | ||||
333 | setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Custom); | ||||
334 | setOperationAction(ISD::BUILD_VECTOR, VT, Custom); | ||||
335 | setOperationAction(ISD::BUILD_VECTOR, VT.getVectorElementType(), Custom); | ||||
336 | setOperationAction(ISD::SCALAR_TO_VECTOR, VT, Legal); | ||||
337 | setOperationAction(ISD::SETCC, VT, Custom); | ||||
338 | setOperationAction(ISD::MLOAD, VT, Custom); | ||||
339 | setOperationAction(ISD::MSTORE, VT, Legal); | ||||
340 | setOperationAction(ISD::SELECT, VT, Expand); | ||||
341 | setOperationAction(ISD::SELECT_CC, VT, Expand); | ||||
342 | |||||
343 | // Pre and Post inc are supported on loads and stores | ||||
344 | for (unsigned im = (unsigned)ISD::PRE_INC; | ||||
345 | im != (unsigned)ISD::LAST_INDEXED_MODE; ++im) { | ||||
346 | setIndexedLoadAction(im, VT, Legal); | ||||
347 | setIndexedStoreAction(im, VT, Legal); | ||||
348 | setIndexedMaskedLoadAction(im, VT, Legal); | ||||
349 | setIndexedMaskedStoreAction(im, VT, Legal); | ||||
350 | } | ||||
351 | |||||
352 | if (HasMVEFP) { | ||||
353 | setOperationAction(ISD::FMINNUM, VT, Legal); | ||||
354 | setOperationAction(ISD::FMAXNUM, VT, Legal); | ||||
355 | setOperationAction(ISD::FROUND, VT, Legal); | ||||
356 | setOperationAction(ISD::VECREDUCE_FADD, VT, Custom); | ||||
357 | setOperationAction(ISD::VECREDUCE_FMUL, VT, Custom); | ||||
358 | setOperationAction(ISD::VECREDUCE_FMIN, VT, Custom); | ||||
359 | setOperationAction(ISD::VECREDUCE_FMAX, VT, Custom); | ||||
360 | |||||
361 | // No native support for these. | ||||
362 | setOperationAction(ISD::FDIV, VT, Expand); | ||||
363 | setOperationAction(ISD::FREM, VT, Expand); | ||||
364 | setOperationAction(ISD::FSQRT, VT, Expand); | ||||
365 | setOperationAction(ISD::FSIN, VT, Expand); | ||||
366 | setOperationAction(ISD::FCOS, VT, Expand); | ||||
367 | setOperationAction(ISD::FPOW, VT, Expand); | ||||
368 | setOperationAction(ISD::FLOG, VT, Expand); | ||||
369 | setOperationAction(ISD::FLOG2, VT, Expand); | ||||
370 | setOperationAction(ISD::FLOG10, VT, Expand); | ||||
371 | setOperationAction(ISD::FEXP, VT, Expand); | ||||
372 | setOperationAction(ISD::FEXP2, VT, Expand); | ||||
373 | setOperationAction(ISD::FNEARBYINT, VT, Expand); | ||||
374 | } | ||||
375 | } | ||||
376 | |||||
377 | // Custom Expand smaller than legal vector reductions to prevent false zero | ||||
378 | // items being added. | ||||
379 | setOperationAction(ISD::VECREDUCE_FADD, MVT::v4f16, Custom); | ||||
380 | setOperationAction(ISD::VECREDUCE_FMUL, MVT::v4f16, Custom); | ||||
381 | setOperationAction(ISD::VECREDUCE_FMIN, MVT::v4f16, Custom); | ||||
382 | setOperationAction(ISD::VECREDUCE_FMAX, MVT::v4f16, Custom); | ||||
383 | setOperationAction(ISD::VECREDUCE_FADD, MVT::v2f16, Custom); | ||||
384 | setOperationAction(ISD::VECREDUCE_FMUL, MVT::v2f16, Custom); | ||||
385 | setOperationAction(ISD::VECREDUCE_FMIN, MVT::v2f16, Custom); | ||||
386 | setOperationAction(ISD::VECREDUCE_FMAX, MVT::v2f16, Custom); | ||||
387 | |||||
388 | // We 'support' these types up to bitcast/load/store level, regardless of | ||||
389 | // MVE integer-only / float support. Only doing FP data processing on the FP | ||||
390 | // vector types is inhibited at integer-only level. | ||||
391 | const MVT LongTypes[] = { MVT::v2i64, MVT::v2f64 }; | ||||
392 | for (auto VT : LongTypes) { | ||||
393 | addRegisterClass(VT, &ARM::MQPRRegClass); | ||||
394 | setAllExpand(VT); | ||||
395 | setOperationAction(ISD::INSERT_VECTOR_ELT, VT, Custom); | ||||
396 | setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Custom); | ||||
397 | setOperationAction(ISD::BUILD_VECTOR, VT, Custom); | ||||
398 | setOperationAction(ISD::VSELECT, VT, Legal); | ||||
399 | setOperationAction(ISD::VECTOR_SHUFFLE, VT, Custom); | ||||
400 | } | ||||
401 | setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v2f64, Legal); | ||||
402 | |||||
403 | // We can do bitwise operations on v2i64 vectors | ||||
404 | setOperationAction(ISD::AND, MVT::v2i64, Legal); | ||||
405 | setOperationAction(ISD::OR, MVT::v2i64, Legal); | ||||
406 | setOperationAction(ISD::XOR, MVT::v2i64, Legal); | ||||
407 | |||||
408 | // It is legal to extload from v4i8 to v4i16 or v4i32. | ||||
409 | addAllExtLoads(MVT::v8i16, MVT::v8i8, Legal); | ||||
410 | addAllExtLoads(MVT::v4i32, MVT::v4i16, Legal); | ||||
411 | addAllExtLoads(MVT::v4i32, MVT::v4i8, Legal); | ||||
412 | |||||
413 | // It is legal to sign extend from v4i8/v4i16 to v4i32 or v8i8 to v8i16. | ||||
414 | setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::v4i8, Legal); | ||||
415 | setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::v4i16, Legal); | ||||
416 | setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::v4i32, Legal); | ||||
417 | setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::v8i8, Legal); | ||||
418 | setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::v8i16, Legal); | ||||
419 | |||||
420 | // Some truncating stores are legal too. | ||||
421 | setTruncStoreAction(MVT::v4i32, MVT::v4i16, Legal); | ||||
422 | setTruncStoreAction(MVT::v4i32, MVT::v4i8, Legal); | ||||
423 | setTruncStoreAction(MVT::v8i16, MVT::v8i8, Legal); | ||||
424 | |||||
425 | // Pre and Post inc on these are legal, given the correct extends | ||||
426 | for (unsigned im = (unsigned)ISD::PRE_INC; | ||||
427 | im != (unsigned)ISD::LAST_INDEXED_MODE; ++im) { | ||||
428 | for (auto VT : {MVT::v8i8, MVT::v4i8, MVT::v4i16}) { | ||||
429 | setIndexedLoadAction(im, VT, Legal); | ||||
430 | setIndexedStoreAction(im, VT, Legal); | ||||
431 | setIndexedMaskedLoadAction(im, VT, Legal); | ||||
432 | setIndexedMaskedStoreAction(im, VT, Legal); | ||||
433 | } | ||||
434 | } | ||||
435 | |||||
436 | // Predicate types | ||||
437 | const MVT pTypes[] = {MVT::v16i1, MVT::v8i1, MVT::v4i1, MVT::v2i1}; | ||||
438 | for (auto VT : pTypes) { | ||||
439 | addRegisterClass(VT, &ARM::VCCRRegClass); | ||||
440 | setOperationAction(ISD::BUILD_VECTOR, VT, Custom); | ||||
441 | setOperationAction(ISD::VECTOR_SHUFFLE, VT, Custom); | ||||
442 | setOperationAction(ISD::EXTRACT_SUBVECTOR, VT, Custom); | ||||
443 | setOperationAction(ISD::CONCAT_VECTORS, VT, Custom); | ||||
444 | setOperationAction(ISD::INSERT_VECTOR_ELT, VT, Custom); | ||||
445 | setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Custom); | ||||
446 | setOperationAction(ISD::SETCC, VT, Custom); | ||||
447 | setOperationAction(ISD::SCALAR_TO_VECTOR, VT, Expand); | ||||
448 | setOperationAction(ISD::LOAD, VT, Custom); | ||||
449 | setOperationAction(ISD::STORE, VT, Custom); | ||||
450 | setOperationAction(ISD::TRUNCATE, VT, Custom); | ||||
451 | setOperationAction(ISD::VSELECT, VT, Expand); | ||||
452 | setOperationAction(ISD::SELECT, VT, Expand); | ||||
453 | } | ||||
454 | setOperationAction(ISD::SETCC, MVT::v2i1, Expand); | ||||
455 | setOperationAction(ISD::TRUNCATE, MVT::v2i1, Expand); | ||||
456 | setOperationAction(ISD::AND, MVT::v2i1, Expand); | ||||
457 | setOperationAction(ISD::OR, MVT::v2i1, Expand); | ||||
458 | setOperationAction(ISD::XOR, MVT::v2i1, Expand); | ||||
459 | setOperationAction(ISD::SINT_TO_FP, MVT::v2i1, Expand); | ||||
460 | setOperationAction(ISD::UINT_TO_FP, MVT::v2i1, Expand); | ||||
461 | setOperationAction(ISD::FP_TO_SINT, MVT::v2i1, Expand); | ||||
462 | setOperationAction(ISD::FP_TO_UINT, MVT::v2i1, Expand); | ||||
463 | |||||
464 | setOperationAction(ISD::SIGN_EXTEND, MVT::v8i32, Custom); | ||||
465 | setOperationAction(ISD::SIGN_EXTEND, MVT::v16i16, Custom); | ||||
466 | setOperationAction(ISD::SIGN_EXTEND, MVT::v16i32, Custom); | ||||
467 | setOperationAction(ISD::ZERO_EXTEND, MVT::v8i32, Custom); | ||||
468 | setOperationAction(ISD::ZERO_EXTEND, MVT::v16i16, Custom); | ||||
469 | setOperationAction(ISD::ZERO_EXTEND, MVT::v16i32, Custom); | ||||
470 | setOperationAction(ISD::TRUNCATE, MVT::v8i32, Custom); | ||||
471 | setOperationAction(ISD::TRUNCATE, MVT::v16i16, Custom); | ||||
472 | } | ||||
473 | |||||
474 | ARMTargetLowering::ARMTargetLowering(const TargetMachine &TM, | ||||
475 | const ARMSubtarget &STI) | ||||
476 | : TargetLowering(TM), Subtarget(&STI) { | ||||
477 | RegInfo = Subtarget->getRegisterInfo(); | ||||
478 | Itins = Subtarget->getInstrItineraryData(); | ||||
479 | |||||
480 | setBooleanContents(ZeroOrOneBooleanContent); | ||||
481 | setBooleanVectorContents(ZeroOrNegativeOneBooleanContent); | ||||
482 | |||||
483 | if (!Subtarget->isTargetDarwin() && !Subtarget->isTargetIOS() && | ||||
484 | !Subtarget->isTargetWatchOS() && !Subtarget->isTargetDriverKit()) { | ||||
485 | bool IsHFTarget = TM.Options.FloatABIType == FloatABI::Hard; | ||||
486 | for (int LCID = 0; LCID < RTLIB::UNKNOWN_LIBCALL; ++LCID) | ||||
487 | setLibcallCallingConv(static_cast<RTLIB::Libcall>(LCID), | ||||
488 | IsHFTarget ? CallingConv::ARM_AAPCS_VFP | ||||
489 | : CallingConv::ARM_AAPCS); | ||||
490 | } | ||||
491 | |||||
492 | if (Subtarget->isTargetMachO()) { | ||||
493 | // Uses VFP for Thumb libfuncs if available. | ||||
494 | if (Subtarget->isThumb() && Subtarget->hasVFP2Base() && | ||||
495 | Subtarget->hasARMOps() && !Subtarget->useSoftFloat()) { | ||||
496 | static const struct { | ||||
497 | const RTLIB::Libcall Op; | ||||
498 | const char * const Name; | ||||
499 | const ISD::CondCode Cond; | ||||
500 | } LibraryCalls[] = { | ||||
501 | // Single-precision floating-point arithmetic. | ||||
502 | { RTLIB::ADD_F32, "__addsf3vfp", ISD::SETCC_INVALID }, | ||||
503 | { RTLIB::SUB_F32, "__subsf3vfp", ISD::SETCC_INVALID }, | ||||
504 | { RTLIB::MUL_F32, "__mulsf3vfp", ISD::SETCC_INVALID }, | ||||
505 | { RTLIB::DIV_F32, "__divsf3vfp", ISD::SETCC_INVALID }, | ||||
506 | |||||
507 | // Double-precision floating-point arithmetic. | ||||
508 | { RTLIB::ADD_F64, "__adddf3vfp", ISD::SETCC_INVALID }, | ||||
509 | { RTLIB::SUB_F64, "__subdf3vfp", ISD::SETCC_INVALID }, | ||||
510 | { RTLIB::MUL_F64, "__muldf3vfp", ISD::SETCC_INVALID }, | ||||
511 | { RTLIB::DIV_F64, "__divdf3vfp", ISD::SETCC_INVALID }, | ||||
512 | |||||
513 | // Single-precision comparisons. | ||||
514 | { RTLIB::OEQ_F32, "__eqsf2vfp", ISD::SETNE }, | ||||
515 | { RTLIB::UNE_F32, "__nesf2vfp", ISD::SETNE }, | ||||
516 | { RTLIB::OLT_F32, "__ltsf2vfp", ISD::SETNE }, | ||||
517 | { RTLIB::OLE_F32, "__lesf2vfp", ISD::SETNE }, | ||||
518 | { RTLIB::OGE_F32, "__gesf2vfp", ISD::SETNE }, | ||||
519 | { RTLIB::OGT_F32, "__gtsf2vfp", ISD::SETNE }, | ||||
520 | { RTLIB::UO_F32, "__unordsf2vfp", ISD::SETNE }, | ||||
521 | |||||
522 | // Double-precision comparisons. | ||||
523 | { RTLIB::OEQ_F64, "__eqdf2vfp", ISD::SETNE }, | ||||
524 | { RTLIB::UNE_F64, "__nedf2vfp", ISD::SETNE }, | ||||
525 | { RTLIB::OLT_F64, "__ltdf2vfp", ISD::SETNE }, | ||||
526 | { RTLIB::OLE_F64, "__ledf2vfp", ISD::SETNE }, | ||||
527 | { RTLIB::OGE_F64, "__gedf2vfp", ISD::SETNE }, | ||||
528 | { RTLIB::OGT_F64, "__gtdf2vfp", ISD::SETNE }, | ||||
529 | { RTLIB::UO_F64, "__unorddf2vfp", ISD::SETNE }, | ||||
530 | |||||
531 | // Floating-point to integer conversions. | ||||
532 | // i64 conversions are done via library routines even when generating VFP | ||||
533 | // instructions, so use the same ones. | ||||
534 | { RTLIB::FPTOSINT_F64_I32, "__fixdfsivfp", ISD::SETCC_INVALID }, | ||||
535 | { RTLIB::FPTOUINT_F64_I32, "__fixunsdfsivfp", ISD::SETCC_INVALID }, | ||||
536 | { RTLIB::FPTOSINT_F32_I32, "__fixsfsivfp", ISD::SETCC_INVALID }, | ||||
537 | { RTLIB::FPTOUINT_F32_I32, "__fixunssfsivfp", ISD::SETCC_INVALID }, | ||||
538 | |||||
539 | // Conversions between floating types. | ||||
540 | { RTLIB::FPROUND_F64_F32, "__truncdfsf2vfp", ISD::SETCC_INVALID }, | ||||
541 | { RTLIB::FPEXT_F32_F64, "__extendsfdf2vfp", ISD::SETCC_INVALID }, | ||||
542 | |||||
543 | // Integer to floating-point conversions. | ||||
544 | // i64 conversions are done via library routines even when generating VFP | ||||
545 | // instructions, so use the same ones. | ||||
546 | // FIXME: There appears to be some naming inconsistency in ARM libgcc: | ||||
547 | // e.g., __floatunsidf vs. __floatunssidfvfp. | ||||
548 | { RTLIB::SINTTOFP_I32_F64, "__floatsidfvfp", ISD::SETCC_INVALID }, | ||||
549 | { RTLIB::UINTTOFP_I32_F64, "__floatunssidfvfp", ISD::SETCC_INVALID }, | ||||
550 | { RTLIB::SINTTOFP_I32_F32, "__floatsisfvfp", ISD::SETCC_INVALID }, | ||||
551 | { RTLIB::UINTTOFP_I32_F32, "__floatunssisfvfp", ISD::SETCC_INVALID }, | ||||
552 | }; | ||||
553 | |||||
554 | for (const auto &LC : LibraryCalls) { | ||||
555 | setLibcallName(LC.Op, LC.Name); | ||||
556 | if (LC.Cond != ISD::SETCC_INVALID) | ||||
557 | setCmpLibcallCC(LC.Op, LC.Cond); | ||||
558 | } | ||||
559 | } | ||||
560 | } | ||||
561 | |||||
562 | // These libcalls are not available in 32-bit. | ||||
563 | setLibcallName(RTLIB::SHL_I128, nullptr); | ||||
564 | setLibcallName(RTLIB::SRL_I128, nullptr); | ||||
565 | setLibcallName(RTLIB::SRA_I128, nullptr); | ||||
566 | setLibcallName(RTLIB::MUL_I128, nullptr); | ||||
567 | setLibcallName(RTLIB::MULO_I64, nullptr); | ||||
568 | setLibcallName(RTLIB::MULO_I128, nullptr); | ||||
569 | |||||
570 | // RTLIB | ||||
571 | if (Subtarget->isAAPCS_ABI() && | ||||
572 | (Subtarget->isTargetAEABI() || Subtarget->isTargetGNUAEABI() || | ||||
573 | Subtarget->isTargetMuslAEABI() || Subtarget->isTargetAndroid())) { | ||||
574 | static const struct { | ||||
575 | const RTLIB::Libcall Op; | ||||
576 | const char * const Name; | ||||
577 | const CallingConv::ID CC; | ||||
578 | const ISD::CondCode Cond; | ||||
579 | } LibraryCalls[] = { | ||||
580 | // Double-precision floating-point arithmetic helper functions | ||||
581 | // RTABI chapter 4.1.2, Table 2 | ||||
582 | { RTLIB::ADD_F64, "__aeabi_dadd", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
583 | { RTLIB::DIV_F64, "__aeabi_ddiv", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
584 | { RTLIB::MUL_F64, "__aeabi_dmul", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
585 | { RTLIB::SUB_F64, "__aeabi_dsub", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
586 | |||||
587 | // Double-precision floating-point comparison helper functions | ||||
588 | // RTABI chapter 4.1.2, Table 3 | ||||
589 | { RTLIB::OEQ_F64, "__aeabi_dcmpeq", CallingConv::ARM_AAPCS, ISD::SETNE }, | ||||
590 | { RTLIB::UNE_F64, "__aeabi_dcmpeq", CallingConv::ARM_AAPCS, ISD::SETEQ }, | ||||
591 | { RTLIB::OLT_F64, "__aeabi_dcmplt", CallingConv::ARM_AAPCS, ISD::SETNE }, | ||||
592 | { RTLIB::OLE_F64, "__aeabi_dcmple", CallingConv::ARM_AAPCS, ISD::SETNE }, | ||||
593 | { RTLIB::OGE_F64, "__aeabi_dcmpge", CallingConv::ARM_AAPCS, ISD::SETNE }, | ||||
594 | { RTLIB::OGT_F64, "__aeabi_dcmpgt", CallingConv::ARM_AAPCS, ISD::SETNE }, | ||||
595 | { RTLIB::UO_F64, "__aeabi_dcmpun", CallingConv::ARM_AAPCS, ISD::SETNE }, | ||||
596 | |||||
597 | // Single-precision floating-point arithmetic helper functions | ||||
598 | // RTABI chapter 4.1.2, Table 4 | ||||
599 | { RTLIB::ADD_F32, "__aeabi_fadd", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
600 | { RTLIB::DIV_F32, "__aeabi_fdiv", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
601 | { RTLIB::MUL_F32, "__aeabi_fmul", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
602 | { RTLIB::SUB_F32, "__aeabi_fsub", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
603 | |||||
604 | // Single-precision floating-point comparison helper functions | ||||
605 | // RTABI chapter 4.1.2, Table 5 | ||||
606 | { RTLIB::OEQ_F32, "__aeabi_fcmpeq", CallingConv::ARM_AAPCS, ISD::SETNE }, | ||||
607 | { RTLIB::UNE_F32, "__aeabi_fcmpeq", CallingConv::ARM_AAPCS, ISD::SETEQ }, | ||||
608 | { RTLIB::OLT_F32, "__aeabi_fcmplt", CallingConv::ARM_AAPCS, ISD::SETNE }, | ||||
609 | { RTLIB::OLE_F32, "__aeabi_fcmple", CallingConv::ARM_AAPCS, ISD::SETNE }, | ||||
610 | { RTLIB::OGE_F32, "__aeabi_fcmpge", CallingConv::ARM_AAPCS, ISD::SETNE }, | ||||
611 | { RTLIB::OGT_F32, "__aeabi_fcmpgt", CallingConv::ARM_AAPCS, ISD::SETNE }, | ||||
612 | { RTLIB::UO_F32, "__aeabi_fcmpun", CallingConv::ARM_AAPCS, ISD::SETNE }, | ||||
613 | |||||
614 | // Floating-point to integer conversions. | ||||
615 | // RTABI chapter 4.1.2, Table 6 | ||||
616 | { RTLIB::FPTOSINT_F64_I32, "__aeabi_d2iz", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
617 | { RTLIB::FPTOUINT_F64_I32, "__aeabi_d2uiz", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
618 | { RTLIB::FPTOSINT_F64_I64, "__aeabi_d2lz", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
619 | { RTLIB::FPTOUINT_F64_I64, "__aeabi_d2ulz", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
620 | { RTLIB::FPTOSINT_F32_I32, "__aeabi_f2iz", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
621 | { RTLIB::FPTOUINT_F32_I32, "__aeabi_f2uiz", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
622 | { RTLIB::FPTOSINT_F32_I64, "__aeabi_f2lz", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
623 | { RTLIB::FPTOUINT_F32_I64, "__aeabi_f2ulz", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
624 | |||||
625 | // Conversions between floating types. | ||||
626 | // RTABI chapter 4.1.2, Table 7 | ||||
627 | { RTLIB::FPROUND_F64_F32, "__aeabi_d2f", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
628 | { RTLIB::FPROUND_F64_F16, "__aeabi_d2h", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
629 | { RTLIB::FPEXT_F32_F64, "__aeabi_f2d", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
630 | |||||
631 | // Integer to floating-point conversions. | ||||
632 | // RTABI chapter 4.1.2, Table 8 | ||||
633 | { RTLIB::SINTTOFP_I32_F64, "__aeabi_i2d", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
634 | { RTLIB::UINTTOFP_I32_F64, "__aeabi_ui2d", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
635 | { RTLIB::SINTTOFP_I64_F64, "__aeabi_l2d", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
636 | { RTLIB::UINTTOFP_I64_F64, "__aeabi_ul2d", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
637 | { RTLIB::SINTTOFP_I32_F32, "__aeabi_i2f", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
638 | { RTLIB::UINTTOFP_I32_F32, "__aeabi_ui2f", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
639 | { RTLIB::SINTTOFP_I64_F32, "__aeabi_l2f", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
640 | { RTLIB::UINTTOFP_I64_F32, "__aeabi_ul2f", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
641 | |||||
642 | // Long long helper functions | ||||
643 | // RTABI chapter 4.2, Table 9 | ||||
644 | { RTLIB::MUL_I64, "__aeabi_lmul", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
645 | { RTLIB::SHL_I64, "__aeabi_llsl", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
646 | { RTLIB::SRL_I64, "__aeabi_llsr", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
647 | { RTLIB::SRA_I64, "__aeabi_lasr", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
648 | |||||
649 | // Integer division functions | ||||
650 | // RTABI chapter 4.3.1 | ||||
651 | { RTLIB::SDIV_I8, "__aeabi_idiv", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
652 | { RTLIB::SDIV_I16, "__aeabi_idiv", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
653 | { RTLIB::SDIV_I32, "__aeabi_idiv", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
654 | { RTLIB::SDIV_I64, "__aeabi_ldivmod", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
655 | { RTLIB::UDIV_I8, "__aeabi_uidiv", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
656 | { RTLIB::UDIV_I16, "__aeabi_uidiv", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
657 | { RTLIB::UDIV_I32, "__aeabi_uidiv", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
658 | { RTLIB::UDIV_I64, "__aeabi_uldivmod", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
659 | }; | ||||
660 | |||||
661 | for (const auto &LC : LibraryCalls) { | ||||
662 | setLibcallName(LC.Op, LC.Name); | ||||
663 | setLibcallCallingConv(LC.Op, LC.CC); | ||||
664 | if (LC.Cond != ISD::SETCC_INVALID) | ||||
665 | setCmpLibcallCC(LC.Op, LC.Cond); | ||||
666 | } | ||||
667 | |||||
668 | // EABI dependent RTLIB | ||||
669 | if (TM.Options.EABIVersion == EABI::EABI4 || | ||||
670 | TM.Options.EABIVersion == EABI::EABI5) { | ||||
671 | static const struct { | ||||
672 | const RTLIB::Libcall Op; | ||||
673 | const char *const Name; | ||||
674 | const CallingConv::ID CC; | ||||
675 | const ISD::CondCode Cond; | ||||
676 | } MemOpsLibraryCalls[] = { | ||||
677 | // Memory operations | ||||
678 | // RTABI chapter 4.3.4 | ||||
679 | { RTLIB::MEMCPY, "__aeabi_memcpy", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
680 | { RTLIB::MEMMOVE, "__aeabi_memmove", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
681 | { RTLIB::MEMSET, "__aeabi_memset", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID }, | ||||
682 | }; | ||||
683 | |||||
684 | for (const auto &LC : MemOpsLibraryCalls) { | ||||
685 | setLibcallName(LC.Op, LC.Name); | ||||
686 | setLibcallCallingConv(LC.Op, LC.CC); | ||||
687 | if (LC.Cond != ISD::SETCC_INVALID) | ||||
688 | setCmpLibcallCC(LC.Op, LC.Cond); | ||||
689 | } | ||||
690 | } | ||||
691 | } | ||||
692 | |||||
693 | if (Subtarget->isTargetWindows()) { | ||||
694 | static const struct { | ||||
695 | const RTLIB::Libcall Op; | ||||
696 | const char * const Name; | ||||
697 | const CallingConv::ID CC; | ||||
698 | } LibraryCalls[] = { | ||||
699 | { RTLIB::FPTOSINT_F32_I64, "__stoi64", CallingConv::ARM_AAPCS_VFP }, | ||||
700 | { RTLIB::FPTOSINT_F64_I64, "__dtoi64", CallingConv::ARM_AAPCS_VFP }, | ||||
701 | { RTLIB::FPTOUINT_F32_I64, "__stou64", CallingConv::ARM_AAPCS_VFP }, | ||||
702 | { RTLIB::FPTOUINT_F64_I64, "__dtou64", CallingConv::ARM_AAPCS_VFP }, | ||||
703 | { RTLIB::SINTTOFP_I64_F32, "__i64tos", CallingConv::ARM_AAPCS_VFP }, | ||||
704 | { RTLIB::SINTTOFP_I64_F64, "__i64tod", CallingConv::ARM_AAPCS_VFP }, | ||||
705 | { RTLIB::UINTTOFP_I64_F32, "__u64tos", CallingConv::ARM_AAPCS_VFP }, | ||||
706 | { RTLIB::UINTTOFP_I64_F64, "__u64tod", CallingConv::ARM_AAPCS_VFP }, | ||||
707 | }; | ||||
708 | |||||
709 | for (const auto &LC : LibraryCalls) { | ||||
710 | setLibcallName(LC.Op, LC.Name); | ||||
711 | setLibcallCallingConv(LC.Op, LC.CC); | ||||
712 | } | ||||
713 | } | ||||
714 | |||||
715 | // Use divmod compiler-rt calls for iOS 5.0 and later. | ||||
716 | if (Subtarget->isTargetMachO() && | ||||
717 | !(Subtarget->isTargetIOS() && | ||||
718 | Subtarget->getTargetTriple().isOSVersionLT(5, 0))) { | ||||
719 | setLibcallName(RTLIB::SDIVREM_I32, "__divmodsi4"); | ||||
720 | setLibcallName(RTLIB::UDIVREM_I32, "__udivmodsi4"); | ||||
721 | } | ||||
722 | |||||
723 | // The half <-> float conversion functions are always soft-float on | ||||
724 | // non-watchos platforms, but are needed for some targets which use a | ||||
725 | // hard-float calling convention by default. | ||||
726 | if (!Subtarget->isTargetWatchABI()) { | ||||
727 | if (Subtarget->isAAPCS_ABI()) { | ||||
728 | setLibcallCallingConv(RTLIB::FPROUND_F32_F16, CallingConv::ARM_AAPCS); | ||||
729 | setLibcallCallingConv(RTLIB::FPROUND_F64_F16, CallingConv::ARM_AAPCS); | ||||
730 | setLibcallCallingConv(RTLIB::FPEXT_F16_F32, CallingConv::ARM_AAPCS); | ||||
731 | } else { | ||||
732 | setLibcallCallingConv(RTLIB::FPROUND_F32_F16, CallingConv::ARM_APCS); | ||||
733 | setLibcallCallingConv(RTLIB::FPROUND_F64_F16, CallingConv::ARM_APCS); | ||||
734 | setLibcallCallingConv(RTLIB::FPEXT_F16_F32, CallingConv::ARM_APCS); | ||||
735 | } | ||||
736 | } | ||||
737 | |||||
738 | // In EABI, these functions have an __aeabi_ prefix, but in GNUEABI they have | ||||
739 | // a __gnu_ prefix (which is the default). | ||||
740 | if (Subtarget->isTargetAEABI()) { | ||||
741 | static const struct { | ||||
742 | const RTLIB::Libcall Op; | ||||
743 | const char * const Name; | ||||
744 | const CallingConv::ID CC; | ||||
745 | } LibraryCalls[] = { | ||||
746 | { RTLIB::FPROUND_F32_F16, "__aeabi_f2h", CallingConv::ARM_AAPCS }, | ||||
747 | { RTLIB::FPROUND_F64_F16, "__aeabi_d2h", CallingConv::ARM_AAPCS }, | ||||
748 | { RTLIB::FPEXT_F16_F32, "__aeabi_h2f", CallingConv::ARM_AAPCS }, | ||||
749 | }; | ||||
750 | |||||
751 | for (const auto &LC : LibraryCalls) { | ||||
752 | setLibcallName(LC.Op, LC.Name); | ||||
753 | setLibcallCallingConv(LC.Op, LC.CC); | ||||
754 | } | ||||
755 | } | ||||
756 | |||||
757 | if (Subtarget->isThumb1Only()) | ||||
758 | addRegisterClass(MVT::i32, &ARM::tGPRRegClass); | ||||
759 | else | ||||
760 | addRegisterClass(MVT::i32, &ARM::GPRRegClass); | ||||
761 | |||||
762 | if (!Subtarget->useSoftFloat() && !Subtarget->isThumb1Only() && | ||||
763 | Subtarget->hasFPRegs()) { | ||||
764 | addRegisterClass(MVT::f32, &ARM::SPRRegClass); | ||||
765 | addRegisterClass(MVT::f64, &ARM::DPRRegClass); | ||||
766 | |||||
767 | setOperationAction(ISD::FP_TO_SINT_SAT, MVT::i32, Custom); | ||||
768 | setOperationAction(ISD::FP_TO_UINT_SAT, MVT::i32, Custom); | ||||
769 | setOperationAction(ISD::FP_TO_SINT_SAT, MVT::i64, Custom); | ||||
770 | setOperationAction(ISD::FP_TO_UINT_SAT, MVT::i64, Custom); | ||||
771 | |||||
772 | if (!Subtarget->hasVFP2Base()) | ||||
773 | setAllExpand(MVT::f32); | ||||
774 | if (!Subtarget->hasFP64()) | ||||
775 | setAllExpand(MVT::f64); | ||||
776 | } | ||||
777 | |||||
778 | if (Subtarget->hasFullFP16()) { | ||||
779 | addRegisterClass(MVT::f16, &ARM::HPRRegClass); | ||||
780 | setOperationAction(ISD::BITCAST, MVT::i16, Custom); | ||||
781 | setOperationAction(ISD::BITCAST, MVT::f16, Custom); | ||||
782 | |||||
783 | setOperationAction(ISD::FMINNUM, MVT::f16, Legal); | ||||
784 | setOperationAction(ISD::FMAXNUM, MVT::f16, Legal); | ||||
785 | } | ||||
786 | |||||
787 | if (Subtarget->hasBF16()) { | ||||
788 | addRegisterClass(MVT::bf16, &ARM::HPRRegClass); | ||||
789 | setAllExpand(MVT::bf16); | ||||
790 | if (!Subtarget->hasFullFP16()) | ||||
791 | setOperationAction(ISD::BITCAST, MVT::bf16, Custom); | ||||
792 | } | ||||
793 | |||||
794 | for (MVT VT : MVT::fixedlen_vector_valuetypes()) { | ||||
795 | for (MVT InnerVT : MVT::fixedlen_vector_valuetypes()) { | ||||
796 | setTruncStoreAction(VT, InnerVT, Expand); | ||||
797 | addAllExtLoads(VT, InnerVT, Expand); | ||||
798 | } | ||||
799 | |||||
800 | setOperationAction(ISD::SMUL_LOHI, VT, Expand); | ||||
801 | setOperationAction(ISD::UMUL_LOHI, VT, Expand); | ||||
802 | |||||
803 | setOperationAction(ISD::BSWAP, VT, Expand); | ||||
804 | } | ||||
805 | |||||
806 | setOperationAction(ISD::ConstantFP, MVT::f32, Custom); | ||||
807 | setOperationAction(ISD::ConstantFP, MVT::f64, Custom); | ||||
808 | |||||
809 | setOperationAction(ISD::READ_REGISTER, MVT::i64, Custom); | ||||
810 | setOperationAction(ISD::WRITE_REGISTER, MVT::i64, Custom); | ||||
811 | |||||
812 | if (Subtarget->hasMVEIntegerOps()) | ||||
813 | addMVEVectorTypes(Subtarget->hasMVEFloatOps()); | ||||
814 | |||||
815 | // Combine low-overhead loop intrinsics so that we can lower i1 types. | ||||
816 | if (Subtarget->hasLOB()) { | ||||
817 | setTargetDAGCombine({ISD::BRCOND, ISD::BR_CC}); | ||||
818 | } | ||||
819 | |||||
820 | if (Subtarget->hasNEON()) { | ||||
821 | addDRTypeForNEON(MVT::v2f32); | ||||
822 | addDRTypeForNEON(MVT::v8i8); | ||||
823 | addDRTypeForNEON(MVT::v4i16); | ||||
824 | addDRTypeForNEON(MVT::v2i32); | ||||
825 | addDRTypeForNEON(MVT::v1i64); | ||||
826 | |||||
827 | addQRTypeForNEON(MVT::v4f32); | ||||
828 | addQRTypeForNEON(MVT::v2f64); | ||||
829 | addQRTypeForNEON(MVT::v16i8); | ||||
830 | addQRTypeForNEON(MVT::v8i16); | ||||
831 | addQRTypeForNEON(MVT::v4i32); | ||||
832 | addQRTypeForNEON(MVT::v2i64); | ||||
833 | |||||
834 | if (Subtarget->hasFullFP16()) { | ||||
835 | addQRTypeForNEON(MVT::v8f16); | ||||
836 | addDRTypeForNEON(MVT::v4f16); | ||||
837 | } | ||||
838 | |||||
839 | if (Subtarget->hasBF16()) { | ||||
840 | addQRTypeForNEON(MVT::v8bf16); | ||||
841 | addDRTypeForNEON(MVT::v4bf16); | ||||
842 | } | ||||
843 | } | ||||
844 | |||||
845 | if (Subtarget->hasMVEIntegerOps() || Subtarget->hasNEON()) { | ||||
846 | // v2f64 is legal so that QR subregs can be extracted as f64 elements, but | ||||
847 | // none of Neon, MVE or VFP supports any arithmetic operations on it. | ||||
848 | setOperationAction(ISD::FADD, MVT::v2f64, Expand); | ||||
849 | setOperationAction(ISD::FSUB, MVT::v2f64, Expand); | ||||
850 | setOperationAction(ISD::FMUL, MVT::v2f64, Expand); | ||||
851 | // FIXME: Code duplication: FDIV and FREM are expanded always, see | ||||
852 | // ARMTargetLowering::addTypeForNEON method for details. | ||||
853 | setOperationAction(ISD::FDIV, MVT::v2f64, Expand); | ||||
854 | setOperationAction(ISD::FREM, MVT::v2f64, Expand); | ||||
855 | // FIXME: Create unittest. | ||||
856 | // In another words, find a way when "copysign" appears in DAG with vector | ||||
857 | // operands. | ||||
858 | setOperationAction(ISD::FCOPYSIGN, MVT::v2f64, Expand); | ||||
859 | // FIXME: Code duplication: SETCC has custom operation action, see | ||||
860 | // ARMTargetLowering::addTypeForNEON method for details. | ||||
861 | setOperationAction(ISD::SETCC, MVT::v2f64, Expand); | ||||
862 | // FIXME: Create unittest for FNEG and for FABS. | ||||
863 | setOperationAction(ISD::FNEG, MVT::v2f64, Expand); | ||||
864 | setOperationAction(ISD::FABS, MVT::v2f64, Expand); | ||||
865 | setOperationAction(ISD::FSQRT, MVT::v2f64, Expand); | ||||
866 | setOperationAction(ISD::FSIN, MVT::v2f64, Expand); | ||||
867 | setOperationAction(ISD::FCOS, MVT::v2f64, Expand); | ||||
868 | setOperationAction(ISD::FPOW, MVT::v2f64, Expand); | ||||
869 | setOperationAction(ISD::FLOG, MVT::v2f64, Expand); | ||||
870 | setOperationAction(ISD::FLOG2, MVT::v2f64, Expand); | ||||
871 | setOperationAction(ISD::FLOG10, MVT::v2f64, Expand); | ||||
872 | setOperationAction(ISD::FEXP, MVT::v2f64, Expand); | ||||
873 | setOperationAction(ISD::FEXP2, MVT::v2f64, Expand); | ||||
874 | // FIXME: Create unittest for FCEIL, FTRUNC, FRINT, FNEARBYINT, FFLOOR. | ||||
875 | setOperationAction(ISD::FCEIL, MVT::v2f64, Expand); | ||||
876 | setOperationAction(ISD::FTRUNC, MVT::v2f64, Expand); | ||||
877 | setOperationAction(ISD::FRINT, MVT::v2f64, Expand); | ||||
878 | setOperationAction(ISD::FNEARBYINT, MVT::v2f64, Expand); | ||||
879 | setOperationAction(ISD::FFLOOR, MVT::v2f64, Expand); | ||||
880 | setOperationAction(ISD::FMA, MVT::v2f64, Expand); | ||||
881 | } | ||||
882 | |||||
883 | if (Subtarget->hasNEON()) { | ||||
884 | // The same with v4f32. But keep in mind that vadd, vsub, vmul are natively | ||||
885 | // supported for v4f32. | ||||
886 | setOperationAction(ISD::FSQRT, MVT::v4f32, Expand); | ||||
887 | setOperationAction(ISD::FSIN, MVT::v4f32, Expand); | ||||
888 | setOperationAction(ISD::FCOS, MVT::v4f32, Expand); | ||||
889 | setOperationAction(ISD::FPOW, MVT::v4f32, Expand); | ||||
890 | setOperationAction(ISD::FLOG, MVT::v4f32, Expand); | ||||
891 | setOperationAction(ISD::FLOG2, MVT::v4f32, Expand); | ||||
892 | setOperationAction(ISD::FLOG10, MVT::v4f32, Expand); | ||||
893 | setOperationAction(ISD::FEXP, MVT::v4f32, Expand); | ||||
894 | setOperationAction(ISD::FEXP2, MVT::v4f32, Expand); | ||||
895 | setOperationAction(ISD::FCEIL, MVT::v4f32, Expand); | ||||
896 | setOperationAction(ISD::FTRUNC, MVT::v4f32, Expand); | ||||
897 | setOperationAction(ISD::FRINT, MVT::v4f32, Expand); | ||||
898 | setOperationAction(ISD::FNEARBYINT, MVT::v4f32, Expand); | ||||
899 | setOperationAction(ISD::FFLOOR, MVT::v4f32, Expand); | ||||
900 | |||||
901 | // Mark v2f32 intrinsics. | ||||
902 | setOperationAction(ISD::FSQRT, MVT::v2f32, Expand); | ||||
903 | setOperationAction(ISD::FSIN, MVT::v2f32, Expand); | ||||
904 | setOperationAction(ISD::FCOS, MVT::v2f32, Expand); | ||||
905 | setOperationAction(ISD::FPOW, MVT::v2f32, Expand); | ||||
906 | setOperationAction(ISD::FLOG, MVT::v2f32, Expand); | ||||
907 | setOperationAction(ISD::FLOG2, MVT::v2f32, Expand); | ||||
908 | setOperationAction(ISD::FLOG10, MVT::v2f32, Expand); | ||||
909 | setOperationAction(ISD::FEXP, MVT::v2f32, Expand); | ||||
910 | setOperationAction(ISD::FEXP2, MVT::v2f32, Expand); | ||||
911 | setOperationAction(ISD::FCEIL, MVT::v2f32, Expand); | ||||
912 | setOperationAction(ISD::FTRUNC, MVT::v2f32, Expand); | ||||
913 | setOperationAction(ISD::FRINT, MVT::v2f32, Expand); | ||||
914 | setOperationAction(ISD::FNEARBYINT, MVT::v2f32, Expand); | ||||
915 | setOperationAction(ISD::FFLOOR, MVT::v2f32, Expand); | ||||
916 | |||||
917 | // Neon does not support some operations on v1i64 and v2i64 types. | ||||
918 | setOperationAction(ISD::MUL, MVT::v1i64, Expand); | ||||
919 | // Custom handling for some quad-vector types to detect VMULL. | ||||
920 | setOperationAction(ISD::MUL, MVT::v8i16, Custom); | ||||
921 | setOperationAction(ISD::MUL, MVT::v4i32, Custom); | ||||
922 | setOperationAction(ISD::MUL, MVT::v2i64, Custom); | ||||
923 | // Custom handling for some vector types to avoid expensive expansions | ||||
924 | setOperationAction(ISD::SDIV, MVT::v4i16, Custom); | ||||
925 | setOperationAction(ISD::SDIV, MVT::v8i8, Custom); | ||||
926 | setOperationAction(ISD::UDIV, MVT::v4i16, Custom); | ||||
927 | setOperationAction(ISD::UDIV, MVT::v8i8, Custom); | ||||
928 | // Neon does not have single instruction SINT_TO_FP and UINT_TO_FP with | ||||
929 | // a destination type that is wider than the source, and nor does | ||||
930 | // it have a FP_TO_[SU]INT instruction with a narrower destination than | ||||
931 | // source. | ||||
932 | setOperationAction(ISD::SINT_TO_FP, MVT::v4i16, Custom); | ||||
933 | setOperationAction(ISD::SINT_TO_FP, MVT::v8i16, Custom); | ||||
934 | setOperationAction(ISD::UINT_TO_FP, MVT::v4i16, Custom); | ||||
935 | setOperationAction(ISD::UINT_TO_FP, MVT::v8i16, Custom); | ||||
936 | setOperationAction(ISD::FP_TO_UINT, MVT::v4i16, Custom); | ||||
937 | setOperationAction(ISD::FP_TO_UINT, MVT::v8i16, Custom); | ||||
938 | setOperationAction(ISD::FP_TO_SINT, MVT::v4i16, Custom); | ||||
939 | setOperationAction(ISD::FP_TO_SINT, MVT::v8i16, Custom); | ||||
940 | |||||
941 | setOperationAction(ISD::FP_ROUND, MVT::v2f32, Expand); | ||||
942 | setOperationAction(ISD::FP_EXTEND, MVT::v2f64, Expand); | ||||
943 | |||||
944 | // NEON does not have single instruction CTPOP for vectors with element | ||||
945 | // types wider than 8-bits. However, custom lowering can leverage the | ||||
946 | // v8i8/v16i8 vcnt instruction. | ||||
947 | setOperationAction(ISD::CTPOP, MVT::v2i32, Custom); | ||||
948 | setOperationAction(ISD::CTPOP, MVT::v4i32, Custom); | ||||
949 | setOperationAction(ISD::CTPOP, MVT::v4i16, Custom); | ||||
950 | setOperationAction(ISD::CTPOP, MVT::v8i16, Custom); | ||||
951 | setOperationAction(ISD::CTPOP, MVT::v1i64, Custom); | ||||
952 | setOperationAction(ISD::CTPOP, MVT::v2i64, Custom); | ||||
953 | |||||
954 | setOperationAction(ISD::CTLZ, MVT::v1i64, Expand); | ||||
955 | setOperationAction(ISD::CTLZ, MVT::v2i64, Expand); | ||||
956 | |||||
957 | // NEON does not have single instruction CTTZ for vectors. | ||||
958 | setOperationAction(ISD::CTTZ, MVT::v8i8, Custom); | ||||
959 | setOperationAction(ISD::CTTZ, MVT::v4i16, Custom); | ||||
960 | setOperationAction(ISD::CTTZ, MVT::v2i32, Custom); | ||||
961 | setOperationAction(ISD::CTTZ, MVT::v1i64, Custom); | ||||
962 | |||||
963 | setOperationAction(ISD::CTTZ, MVT::v16i8, Custom); | ||||
964 | setOperationAction(ISD::CTTZ, MVT::v8i16, Custom); | ||||
965 | setOperationAction(ISD::CTTZ, MVT::v4i32, Custom); | ||||
966 | setOperationAction(ISD::CTTZ, MVT::v2i64, Custom); | ||||
967 | |||||
968 | setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::v8i8, Custom); | ||||
969 | setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::v4i16, Custom); | ||||
970 | setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::v2i32, Custom); | ||||
971 | setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::v1i64, Custom); | ||||
972 | |||||
973 | setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::v16i8, Custom); | ||||
974 | setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::v8i16, Custom); | ||||
975 | setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::v4i32, Custom); | ||||
976 | setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::v2i64, Custom); | ||||
977 | |||||
978 | for (MVT VT : MVT::fixedlen_vector_valuetypes()) { | ||||
979 | setOperationAction(ISD::MULHS, VT, Expand); | ||||
980 | setOperationAction(ISD::MULHU, VT, Expand); | ||||
981 | } | ||||
982 | |||||
983 | // NEON only has FMA instructions as of VFP4. | ||||
984 | if (!Subtarget->hasVFP4Base()) { | ||||
985 | setOperationAction(ISD::FMA, MVT::v2f32, Expand); | ||||
986 | setOperationAction(ISD::FMA, MVT::v4f32, Expand); | ||||
987 | } | ||||
988 | |||||
989 | setTargetDAGCombine({ISD::SHL, ISD::SRL, ISD::SRA, ISD::FP_TO_SINT, | ||||
990 | ISD::FP_TO_UINT, ISD::FDIV, ISD::LOAD}); | ||||
991 | |||||
992 | // It is legal to extload from v4i8 to v4i16 or v4i32. | ||||
993 | for (MVT Ty : {MVT::v8i8, MVT::v4i8, MVT::v2i8, MVT::v4i16, MVT::v2i16, | ||||
994 | MVT::v2i32}) { | ||||
995 | for (MVT VT : MVT::integer_fixedlen_vector_valuetypes()) { | ||||
996 | setLoadExtAction(ISD::EXTLOAD, VT, Ty, Legal); | ||||
997 | setLoadExtAction(ISD::ZEXTLOAD, VT, Ty, Legal); | ||||
998 | setLoadExtAction(ISD::SEXTLOAD, VT, Ty, Legal); | ||||
999 | } | ||||
1000 | } | ||||
1001 | } | ||||
1002 | |||||
1003 | if (Subtarget->hasNEON() || Subtarget->hasMVEIntegerOps()) { | ||||
1004 | setTargetDAGCombine( | ||||
1005 | {ISD::BUILD_VECTOR, ISD::VECTOR_SHUFFLE, ISD::INSERT_SUBVECTOR, | ||||
1006 | ISD::INSERT_VECTOR_ELT, ISD::EXTRACT_VECTOR_ELT, | ||||
1007 | ISD::SIGN_EXTEND_INREG, ISD::STORE, ISD::SIGN_EXTEND, ISD::ZERO_EXTEND, | ||||
1008 | ISD::ANY_EXTEND, ISD::INTRINSIC_WO_CHAIN, ISD::INTRINSIC_W_CHAIN, | ||||
1009 | ISD::INTRINSIC_VOID, ISD::VECREDUCE_ADD, ISD::ADD, ISD::BITCAST}); | ||||
1010 | } | ||||
1011 | if (Subtarget->hasMVEIntegerOps()) { | ||||
1012 | setTargetDAGCombine({ISD::SMIN, ISD::UMIN, ISD::SMAX, ISD::UMAX, | ||||
1013 | ISD::FP_EXTEND, ISD::SELECT, ISD::SELECT_CC, | ||||
1014 | ISD::SETCC}); | ||||
1015 | } | ||||
1016 | if (Subtarget->hasMVEFloatOps()) { | ||||
1017 | setTargetDAGCombine(ISD::FADD); | ||||
1018 | } | ||||
1019 | |||||
1020 | if (!Subtarget->hasFP64()) { | ||||
1021 | // When targeting a floating-point unit with only single-precision | ||||
1022 | // operations, f64 is legal for the few double-precision instructions which | ||||
1023 | // are present However, no double-precision operations other than moves, | ||||
1024 | // loads and stores are provided by the hardware. | ||||
1025 | setOperationAction(ISD::FADD, MVT::f64, Expand); | ||||
1026 | setOperationAction(ISD::FSUB, MVT::f64, Expand); | ||||
1027 | setOperationAction(ISD::FMUL, MVT::f64, Expand); | ||||
1028 | setOperationAction(ISD::FMA, MVT::f64, Expand); | ||||
1029 | setOperationAction(ISD::FDIV, MVT::f64, Expand); | ||||
1030 | setOperationAction(ISD::FREM, MVT::f64, Expand); | ||||
1031 | setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand); | ||||
1032 | setOperationAction(ISD::FGETSIGN, MVT::f64, Expand); | ||||
1033 | setOperationAction(ISD::FNEG, MVT::f64, Expand); | ||||
1034 | setOperationAction(ISD::FABS, MVT::f64, Expand); | ||||
1035 | setOperationAction(ISD::FSQRT, MVT::f64, Expand); | ||||
1036 | setOperationAction(ISD::FSIN, MVT::f64, Expand); | ||||
1037 | setOperationAction(ISD::FCOS, MVT::f64, Expand); | ||||
1038 | setOperationAction(ISD::FPOW, MVT::f64, Expand); | ||||
1039 | setOperationAction(ISD::FLOG, MVT::f64, Expand); | ||||
1040 | setOperationAction(ISD::FLOG2, MVT::f64, Expand); | ||||
1041 | setOperationAction(ISD::FLOG10, MVT::f64, Expand); | ||||
1042 | setOperationAction(ISD::FEXP, MVT::f64, Expand); | ||||
1043 | setOperationAction(ISD::FEXP2, MVT::f64, Expand); | ||||
1044 | setOperationAction(ISD::FCEIL, MVT::f64, Expand); | ||||
1045 | setOperationAction(ISD::FTRUNC, MVT::f64, Expand); | ||||
1046 | setOperationAction(ISD::FRINT, MVT::f64, Expand); | ||||
1047 | setOperationAction(ISD::FNEARBYINT, MVT::f64, Expand); | ||||
1048 | setOperationAction(ISD::FFLOOR, MVT::f64, Expand); | ||||
1049 | setOperationAction(ISD::SINT_TO_FP, MVT::i32, Custom); | ||||
1050 | setOperationAction(ISD::UINT_TO_FP, MVT::i32, Custom); | ||||
1051 | setOperationAction(ISD::FP_TO_SINT, MVT::i32, Custom); | ||||
1052 | setOperationAction(ISD::FP_TO_UINT, MVT::i32, Custom); | ||||
1053 | setOperationAction(ISD::FP_TO_SINT, MVT::f64, Custom); | ||||
1054 | setOperationAction(ISD::FP_TO_UINT, MVT::f64, Custom); | ||||
1055 | setOperationAction(ISD::FP_ROUND, MVT::f32, Custom); | ||||
1056 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::i32, Custom); | ||||
1057 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::i32, Custom); | ||||
1058 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::f64, Custom); | ||||
1059 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::f64, Custom); | ||||
1060 | setOperationAction(ISD::STRICT_FP_ROUND, MVT::f32, Custom); | ||||
1061 | } | ||||
1062 | |||||
1063 | if (!Subtarget->hasFP64() || !Subtarget->hasFPARMv8Base()) { | ||||
1064 | setOperationAction(ISD::FP_EXTEND, MVT::f64, Custom); | ||||
1065 | setOperationAction(ISD::STRICT_FP_EXTEND, MVT::f64, Custom); | ||||
1066 | if (Subtarget->hasFullFP16()) { | ||||
1067 | setOperationAction(ISD::FP_ROUND, MVT::f16, Custom); | ||||
1068 | setOperationAction(ISD::STRICT_FP_ROUND, MVT::f16, Custom); | ||||
1069 | } | ||||
1070 | } | ||||
1071 | |||||
1072 | if (!Subtarget->hasFP16()) { | ||||
1073 | setOperationAction(ISD::FP_EXTEND, MVT::f32, Custom); | ||||
1074 | setOperationAction(ISD::STRICT_FP_EXTEND, MVT::f32, Custom); | ||||
1075 | } | ||||
1076 | |||||
1077 | computeRegisterProperties(Subtarget->getRegisterInfo()); | ||||
1078 | |||||
1079 | // ARM does not have floating-point extending loads. | ||||
1080 | for (MVT VT : MVT::fp_valuetypes()) { | ||||
1081 | setLoadExtAction(ISD::EXTLOAD, VT, MVT::f32, Expand); | ||||
1082 | setLoadExtAction(ISD::EXTLOAD, VT, MVT::f16, Expand); | ||||
1083 | } | ||||
1084 | |||||
1085 | // ... or truncating stores | ||||
1086 | setTruncStoreAction(MVT::f64, MVT::f32, Expand); | ||||
1087 | setTruncStoreAction(MVT::f32, MVT::f16, Expand); | ||||
1088 | setTruncStoreAction(MVT::f64, MVT::f16, Expand); | ||||
1089 | |||||
1090 | // ARM does not have i1 sign extending load. | ||||
1091 | for (MVT VT : MVT::integer_valuetypes()) | ||||
1092 | setLoadExtAction(ISD::SEXTLOAD, VT, MVT::i1, Promote); | ||||
1093 | |||||
1094 | // ARM supports all 4 flavors of integer indexed load / store. | ||||
1095 | if (!Subtarget->isThumb1Only()) { | ||||
1096 | for (unsigned im = (unsigned)ISD::PRE_INC; | ||||
1097 | im != (unsigned)ISD::LAST_INDEXED_MODE; ++im) { | ||||
1098 | setIndexedLoadAction(im, MVT::i1, Legal); | ||||
1099 | setIndexedLoadAction(im, MVT::i8, Legal); | ||||
1100 | setIndexedLoadAction(im, MVT::i16, Legal); | ||||
1101 | setIndexedLoadAction(im, MVT::i32, Legal); | ||||
1102 | setIndexedStoreAction(im, MVT::i1, Legal); | ||||
1103 | setIndexedStoreAction(im, MVT::i8, Legal); | ||||
1104 | setIndexedStoreAction(im, MVT::i16, Legal); | ||||
1105 | setIndexedStoreAction(im, MVT::i32, Legal); | ||||
1106 | } | ||||
1107 | } else { | ||||
1108 | // Thumb-1 has limited post-inc load/store support - LDM r0!, {r1}. | ||||
1109 | setIndexedLoadAction(ISD::POST_INC, MVT::i32, Legal); | ||||
1110 | setIndexedStoreAction(ISD::POST_INC, MVT::i32, Legal); | ||||
1111 | } | ||||
1112 | |||||
1113 | setOperationAction(ISD::SADDO, MVT::i32, Custom); | ||||
1114 | setOperationAction(ISD::UADDO, MVT::i32, Custom); | ||||
1115 | setOperationAction(ISD::SSUBO, MVT::i32, Custom); | ||||
1116 | setOperationAction(ISD::USUBO, MVT::i32, Custom); | ||||
1117 | |||||
1118 | setOperationAction(ISD::ADDCARRY, MVT::i32, Custom); | ||||
1119 | setOperationAction(ISD::SUBCARRY, MVT::i32, Custom); | ||||
1120 | if (Subtarget->hasDSP()) { | ||||
1121 | setOperationAction(ISD::SADDSAT, MVT::i8, Custom); | ||||
1122 | setOperationAction(ISD::SSUBSAT, MVT::i8, Custom); | ||||
1123 | setOperationAction(ISD::SADDSAT, MVT::i16, Custom); | ||||
1124 | setOperationAction(ISD::SSUBSAT, MVT::i16, Custom); | ||||
1125 | setOperationAction(ISD::UADDSAT, MVT::i8, Custom); | ||||
1126 | setOperationAction(ISD::USUBSAT, MVT::i8, Custom); | ||||
1127 | setOperationAction(ISD::UADDSAT, MVT::i16, Custom); | ||||
1128 | setOperationAction(ISD::USUBSAT, MVT::i16, Custom); | ||||
1129 | } | ||||
1130 | if (Subtarget->hasBaseDSP()) { | ||||
1131 | setOperationAction(ISD::SADDSAT, MVT::i32, Legal); | ||||
1132 | setOperationAction(ISD::SSUBSAT, MVT::i32, Legal); | ||||
1133 | } | ||||
1134 | |||||
1135 | // i64 operation support. | ||||
1136 | setOperationAction(ISD::MUL, MVT::i64, Expand); | ||||
1137 | setOperationAction(ISD::MULHU, MVT::i32, Expand); | ||||
1138 | if (Subtarget->isThumb1Only()) { | ||||
1139 | setOperationAction(ISD::UMUL_LOHI, MVT::i32, Expand); | ||||
1140 | setOperationAction(ISD::SMUL_LOHI, MVT::i32, Expand); | ||||
1141 | } | ||||
1142 | if (Subtarget->isThumb1Only() || !Subtarget->hasV6Ops() | ||||
1143 | || (Subtarget->isThumb2() && !Subtarget->hasDSP())) | ||||
1144 | setOperationAction(ISD::MULHS, MVT::i32, Expand); | ||||
1145 | |||||
1146 | setOperationAction(ISD::SHL_PARTS, MVT::i32, Custom); | ||||
1147 | setOperationAction(ISD::SRA_PARTS, MVT::i32, Custom); | ||||
1148 | setOperationAction(ISD::SRL_PARTS, MVT::i32, Custom); | ||||
1149 | setOperationAction(ISD::SRL, MVT::i64, Custom); | ||||
1150 | setOperationAction(ISD::SRA, MVT::i64, Custom); | ||||
1151 | setOperationAction(ISD::INTRINSIC_VOID, MVT::Other, Custom); | ||||
1152 | setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::i64, Custom); | ||||
1153 | setOperationAction(ISD::LOAD, MVT::i64, Custom); | ||||
1154 | setOperationAction(ISD::STORE, MVT::i64, Custom); | ||||
1155 | |||||
1156 | // MVE lowers 64 bit shifts to lsll and lsrl | ||||
1157 | // assuming that ISD::SRL and SRA of i64 are already marked custom | ||||
1158 | if (Subtarget->hasMVEIntegerOps()) | ||||
1159 | setOperationAction(ISD::SHL, MVT::i64, Custom); | ||||
1160 | |||||
1161 | // Expand to __aeabi_l{lsl,lsr,asr} calls for Thumb1. | ||||
1162 | if (Subtarget->isThumb1Only()) { | ||||
1163 | setOperationAction(ISD::SHL_PARTS, MVT::i32, Expand); | ||||
1164 | setOperationAction(ISD::SRA_PARTS, MVT::i32, Expand); | ||||
1165 | setOperationAction(ISD::SRL_PARTS, MVT::i32, Expand); | ||||
1166 | } | ||||
1167 | |||||
1168 | if (!Subtarget->isThumb1Only() && Subtarget->hasV6T2Ops()) | ||||
1169 | setOperationAction(ISD::BITREVERSE, MVT::i32, Legal); | ||||
1170 | |||||
1171 | // ARM does not have ROTL. | ||||
1172 | setOperationAction(ISD::ROTL, MVT::i32, Expand); | ||||
1173 | for (MVT VT : MVT::fixedlen_vector_valuetypes()) { | ||||
1174 | setOperationAction(ISD::ROTL, VT, Expand); | ||||
1175 | setOperationAction(ISD::ROTR, VT, Expand); | ||||
1176 | } | ||||
1177 | setOperationAction(ISD::CTTZ, MVT::i32, Custom); | ||||
1178 | setOperationAction(ISD::CTPOP, MVT::i32, Expand); | ||||
1179 | if (!Subtarget->hasV5TOps() || Subtarget->isThumb1Only()) { | ||||
1180 | setOperationAction(ISD::CTLZ, MVT::i32, Expand); | ||||
1181 | setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i32, LibCall); | ||||
1182 | } | ||||
1183 | |||||
1184 | // @llvm.readcyclecounter requires the Performance Monitors extension. | ||||
1185 | // Default to the 0 expansion on unsupported platforms. | ||||
1186 | // FIXME: Technically there are older ARM CPUs that have | ||||
1187 | // implementation-specific ways of obtaining this information. | ||||
1188 | if (Subtarget->hasPerfMon()) | ||||
1189 | setOperationAction(ISD::READCYCLECOUNTER, MVT::i64, Custom); | ||||
1190 | |||||
1191 | // Only ARMv6 has BSWAP. | ||||
1192 | if (!Subtarget->hasV6Ops()) | ||||
1193 | setOperationAction(ISD::BSWAP, MVT::i32, Expand); | ||||
1194 | |||||
1195 | bool hasDivide = Subtarget->isThumb() ? Subtarget->hasDivideInThumbMode() | ||||
1196 | : Subtarget->hasDivideInARMMode(); | ||||
1197 | if (!hasDivide) { | ||||
1198 | // These are expanded into libcalls if the cpu doesn't have HW divider. | ||||
1199 | setOperationAction(ISD::SDIV, MVT::i32, LibCall); | ||||
1200 | setOperationAction(ISD::UDIV, MVT::i32, LibCall); | ||||
1201 | } | ||||
1202 | |||||
1203 | if (Subtarget->isTargetWindows() && !Subtarget->hasDivideInThumbMode()) { | ||||
1204 | setOperationAction(ISD::SDIV, MVT::i32, Custom); | ||||
1205 | setOperationAction(ISD::UDIV, MVT::i32, Custom); | ||||
1206 | |||||
1207 | setOperationAction(ISD::SDIV, MVT::i64, Custom); | ||||
1208 | setOperationAction(ISD::UDIV, MVT::i64, Custom); | ||||
1209 | } | ||||
1210 | |||||
1211 | setOperationAction(ISD::SREM, MVT::i32, Expand); | ||||
1212 | setOperationAction(ISD::UREM, MVT::i32, Expand); | ||||
1213 | |||||
1214 | // Register based DivRem for AEABI (RTABI 4.2) | ||||
1215 | if (Subtarget->isTargetAEABI() || Subtarget->isTargetAndroid() || | ||||
1216 | Subtarget->isTargetGNUAEABI() || Subtarget->isTargetMuslAEABI() || | ||||
1217 | Subtarget->isTargetWindows()) { | ||||
1218 | setOperationAction(ISD::SREM, MVT::i64, Custom); | ||||
1219 | setOperationAction(ISD::UREM, MVT::i64, Custom); | ||||
1220 | HasStandaloneRem = false; | ||||
1221 | |||||
1222 | if (Subtarget->isTargetWindows()) { | ||||
1223 | const struct { | ||||
1224 | const RTLIB::Libcall Op; | ||||
1225 | const char * const Name; | ||||
1226 | const CallingConv::ID CC; | ||||
1227 | } LibraryCalls[] = { | ||||
1228 | { RTLIB::SDIVREM_I8, "__rt_sdiv", CallingConv::ARM_AAPCS }, | ||||
1229 | { RTLIB::SDIVREM_I16, "__rt_sdiv", CallingConv::ARM_AAPCS }, | ||||
1230 | { RTLIB::SDIVREM_I32, "__rt_sdiv", CallingConv::ARM_AAPCS }, | ||||
1231 | { RTLIB::SDIVREM_I64, "__rt_sdiv64", CallingConv::ARM_AAPCS }, | ||||
1232 | |||||
1233 | { RTLIB::UDIVREM_I8, "__rt_udiv", CallingConv::ARM_AAPCS }, | ||||
1234 | { RTLIB::UDIVREM_I16, "__rt_udiv", CallingConv::ARM_AAPCS }, | ||||
1235 | { RTLIB::UDIVREM_I32, "__rt_udiv", CallingConv::ARM_AAPCS }, | ||||
1236 | { RTLIB::UDIVREM_I64, "__rt_udiv64", CallingConv::ARM_AAPCS }, | ||||
1237 | }; | ||||
1238 | |||||
1239 | for (const auto &LC : LibraryCalls) { | ||||
1240 | setLibcallName(LC.Op, LC.Name); | ||||
1241 | setLibcallCallingConv(LC.Op, LC.CC); | ||||
1242 | } | ||||
1243 | } else { | ||||
1244 | const struct { | ||||
1245 | const RTLIB::Libcall Op; | ||||
1246 | const char * const Name; | ||||
1247 | const CallingConv::ID CC; | ||||
1248 | } LibraryCalls[] = { | ||||
1249 | { RTLIB::SDIVREM_I8, "__aeabi_idivmod", CallingConv::ARM_AAPCS }, | ||||
1250 | { RTLIB::SDIVREM_I16, "__aeabi_idivmod", CallingConv::ARM_AAPCS }, | ||||
1251 | { RTLIB::SDIVREM_I32, "__aeabi_idivmod", CallingConv::ARM_AAPCS }, | ||||
1252 | { RTLIB::SDIVREM_I64, "__aeabi_ldivmod", CallingConv::ARM_AAPCS }, | ||||
1253 | |||||
1254 | { RTLIB::UDIVREM_I8, "__aeabi_uidivmod", CallingConv::ARM_AAPCS }, | ||||
1255 | { RTLIB::UDIVREM_I16, "__aeabi_uidivmod", CallingConv::ARM_AAPCS }, | ||||
1256 | { RTLIB::UDIVREM_I32, "__aeabi_uidivmod", CallingConv::ARM_AAPCS }, | ||||
1257 | { RTLIB::UDIVREM_I64, "__aeabi_uldivmod", CallingConv::ARM_AAPCS }, | ||||
1258 | }; | ||||
1259 | |||||
1260 | for (const auto &LC : LibraryCalls) { | ||||
1261 | setLibcallName(LC.Op, LC.Name); | ||||
1262 | setLibcallCallingConv(LC.Op, LC.CC); | ||||
1263 | } | ||||
1264 | } | ||||
1265 | |||||
1266 | setOperationAction(ISD::SDIVREM, MVT::i32, Custom); | ||||
1267 | setOperationAction(ISD::UDIVREM, MVT::i32, Custom); | ||||
1268 | setOperationAction(ISD::SDIVREM, MVT::i64, Custom); | ||||
1269 | setOperationAction(ISD::UDIVREM, MVT::i64, Custom); | ||||
1270 | } else { | ||||
1271 | setOperationAction(ISD::SDIVREM, MVT::i32, Expand); | ||||
1272 | setOperationAction(ISD::UDIVREM, MVT::i32, Expand); | ||||
1273 | } | ||||
1274 | |||||
1275 | if (Subtarget->getTargetTriple().isOSMSVCRT()) { | ||||
1276 | // MSVCRT doesn't have powi; fall back to pow | ||||
1277 | setLibcallName(RTLIB::POWI_F32, nullptr); | ||||
1278 | setLibcallName(RTLIB::POWI_F64, nullptr); | ||||
1279 | } | ||||
1280 | |||||
1281 | setOperationAction(ISD::GlobalAddress, MVT::i32, Custom); | ||||
1282 | setOperationAction(ISD::ConstantPool, MVT::i32, Custom); | ||||
1283 | setOperationAction(ISD::GlobalTLSAddress, MVT::i32, Custom); | ||||
1284 | setOperationAction(ISD::BlockAddress, MVT::i32, Custom); | ||||
1285 | |||||
1286 | setOperationAction(ISD::TRAP, MVT::Other, Legal); | ||||
1287 | setOperationAction(ISD::DEBUGTRAP, MVT::Other, Legal); | ||||
1288 | |||||
1289 | // Use the default implementation. | ||||
1290 | setOperationAction(ISD::VASTART, MVT::Other, Custom); | ||||
1291 | setOperationAction(ISD::VAARG, MVT::Other, Expand); | ||||
1292 | setOperationAction(ISD::VACOPY, MVT::Other, Expand); | ||||
1293 | setOperationAction(ISD::VAEND, MVT::Other, Expand); | ||||
1294 | setOperationAction(ISD::STACKSAVE, MVT::Other, Expand); | ||||
1295 | setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand); | ||||
1296 | |||||
1297 | if (Subtarget->isTargetWindows()) | ||||
1298 | setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Custom); | ||||
1299 | else | ||||
1300 | setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Expand); | ||||
1301 | |||||
1302 | // ARMv6 Thumb1 (except for CPUs that support dmb / dsb) and earlier use | ||||
1303 | // the default expansion. | ||||
1304 | InsertFencesForAtomic = false; | ||||
1305 | if (Subtarget->hasAnyDataBarrier() && | ||||
1306 | (!Subtarget->isThumb() || Subtarget->hasV8MBaselineOps())) { | ||||
1307 | // ATOMIC_FENCE needs custom lowering; the others should have been expanded | ||||
1308 | // to ldrex/strex loops already. | ||||
1309 | setOperationAction(ISD::ATOMIC_FENCE, MVT::Other, Custom); | ||||
1310 | if (!Subtarget->isThumb() || !Subtarget->isMClass()) | ||||
1311 | setOperationAction(ISD::ATOMIC_CMP_SWAP, MVT::i64, Custom); | ||||
1312 | |||||
1313 | // On v8, we have particularly efficient implementations of atomic fences | ||||
1314 | // if they can be combined with nearby atomic loads and stores. | ||||
1315 | if (!Subtarget->hasAcquireRelease() || | ||||
1316 | getTargetMachine().getOptLevel() == 0) { | ||||
1317 | // Automatically insert fences (dmb ish) around ATOMIC_SWAP etc. | ||||
1318 | InsertFencesForAtomic = true; | ||||
1319 | } | ||||
1320 | } else { | ||||
1321 | // If there's anything we can use as a barrier, go through custom lowering | ||||
1322 | // for ATOMIC_FENCE. | ||||
1323 | // If target has DMB in thumb, Fences can be inserted. | ||||
1324 | if (Subtarget->hasDataBarrier()) | ||||
1325 | InsertFencesForAtomic = true; | ||||
1326 | |||||
1327 | setOperationAction(ISD::ATOMIC_FENCE, MVT::Other, | ||||
1328 | Subtarget->hasAnyDataBarrier() ? Custom : Expand); | ||||
1329 | |||||
1330 | // Set them all for expansion, which will force libcalls. | ||||
1331 | setOperationAction(ISD::ATOMIC_CMP_SWAP, MVT::i32, Expand); | ||||
1332 | setOperationAction(ISD::ATOMIC_SWAP, MVT::i32, Expand); | ||||
1333 | setOperationAction(ISD::ATOMIC_LOAD_ADD, MVT::i32, Expand); | ||||
1334 | setOperationAction(ISD::ATOMIC_LOAD_SUB, MVT::i32, Expand); | ||||
1335 | setOperationAction(ISD::ATOMIC_LOAD_AND, MVT::i32, Expand); | ||||
1336 | setOperationAction(ISD::ATOMIC_LOAD_OR, MVT::i32, Expand); | ||||
1337 | setOperationAction(ISD::ATOMIC_LOAD_XOR, MVT::i32, Expand); | ||||
1338 | setOperationAction(ISD::ATOMIC_LOAD_NAND, MVT::i32, Expand); | ||||
1339 | setOperationAction(ISD::ATOMIC_LOAD_MIN, MVT::i32, Expand); | ||||
1340 | setOperationAction(ISD::ATOMIC_LOAD_MAX, MVT::i32, Expand); | ||||
1341 | setOperationAction(ISD::ATOMIC_LOAD_UMIN, MVT::i32, Expand); | ||||
1342 | setOperationAction(ISD::ATOMIC_LOAD_UMAX, MVT::i32, Expand); | ||||
1343 | // Mark ATOMIC_LOAD and ATOMIC_STORE custom so we can handle the | ||||
1344 | // Unordered/Monotonic case. | ||||
1345 | if (!InsertFencesForAtomic) { | ||||
1346 | setOperationAction(ISD::ATOMIC_LOAD, MVT::i32, Custom); | ||||
1347 | setOperationAction(ISD::ATOMIC_STORE, MVT::i32, Custom); | ||||
1348 | } | ||||
1349 | } | ||||
1350 | |||||
1351 | // Compute supported atomic widths. | ||||
1352 | if (Subtarget->isTargetLinux() || | ||||
1353 | (!Subtarget->isMClass() && Subtarget->hasV6Ops())) { | ||||
1354 | // For targets where __sync_* routines are reliably available, we use them | ||||
1355 | // if necessary. | ||||
1356 | // | ||||
1357 | // ARM Linux always supports 64-bit atomics through kernel-assisted atomic | ||||
1358 | // routines (kernel 3.1 or later). FIXME: Not with compiler-rt? | ||||
1359 | // | ||||
1360 | // ARMv6 targets have native instructions in ARM mode. For Thumb mode, | ||||
1361 | // such targets should provide __sync_* routines, which use the ARM mode | ||||
1362 | // instructions. (ARMv6 doesn't have dmb, but it has an equivalent | ||||
1363 | // encoding; see ARMISD::MEMBARRIER_MCR.) | ||||
1364 | setMaxAtomicSizeInBitsSupported(64); | ||||
1365 | } else if (Subtarget->isMClass() && Subtarget->hasV8MBaselineOps()) { | ||||
1366 | // Cortex-M (besides Cortex-M0) have 32-bit atomics. | ||||
1367 | setMaxAtomicSizeInBitsSupported(32); | ||||
1368 | } else { | ||||
1369 | // We can't assume anything about other targets; just use libatomic | ||||
1370 | // routines. | ||||
1371 | setMaxAtomicSizeInBitsSupported(0); | ||||
1372 | } | ||||
1373 | |||||
1374 | setOperationAction(ISD::PREFETCH, MVT::Other, Custom); | ||||
1375 | |||||
1376 | // Requires SXTB/SXTH, available on v6 and up in both ARM and Thumb modes. | ||||
1377 | if (!Subtarget->hasV6Ops()) { | ||||
1378 | setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16, Expand); | ||||
1379 | setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8, Expand); | ||||
1380 | } | ||||
1381 | setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1, Expand); | ||||
1382 | |||||
1383 | if (!Subtarget->useSoftFloat() && Subtarget->hasFPRegs() && | ||||
1384 | !Subtarget->isThumb1Only()) { | ||||
1385 | // Turn f64->i64 into VMOVRRD, i64 -> f64 to VMOVDRR | ||||
1386 | // iff target supports vfp2. | ||||
1387 | setOperationAction(ISD::BITCAST, MVT::i64, Custom); | ||||
1388 | setOperationAction(ISD::FLT_ROUNDS_, MVT::i32, Custom); | ||||
1389 | setOperationAction(ISD::SET_ROUNDING, MVT::Other, Custom); | ||||
1390 | } | ||||
1391 | |||||
1392 | // We want to custom lower some of our intrinsics. | ||||
1393 | setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom); | ||||
1394 | setOperationAction(ISD::EH_SJLJ_SETJMP, MVT::i32, Custom); | ||||
1395 | setOperationAction(ISD::EH_SJLJ_LONGJMP, MVT::Other, Custom); | ||||
1396 | setOperationAction(ISD::EH_SJLJ_SETUP_DISPATCH, MVT::Other, Custom); | ||||
1397 | if (Subtarget->useSjLjEH()) | ||||
1398 | setLibcallName(RTLIB::UNWIND_RESUME, "_Unwind_SjLj_Resume"); | ||||
1399 | |||||
1400 | setOperationAction(ISD::SETCC, MVT::i32, Expand); | ||||
1401 | setOperationAction(ISD::SETCC, MVT::f32, Expand); | ||||
1402 | setOperationAction(ISD::SETCC, MVT::f64, Expand); | ||||
1403 | setOperationAction(ISD::SELECT, MVT::i32, Custom); | ||||
1404 | setOperationAction(ISD::SELECT, MVT::f32, Custom); | ||||
1405 | setOperationAction(ISD::SELECT, MVT::f64, Custom); | ||||
1406 | setOperationAction(ISD::SELECT_CC, MVT::i32, Custom); | ||||
1407 | setOperationAction(ISD::SELECT_CC, MVT::f32, Custom); | ||||
1408 | setOperationAction(ISD::SELECT_CC, MVT::f64, Custom); | ||||
1409 | if (Subtarget->hasFullFP16()) { | ||||
1410 | setOperationAction(ISD::SETCC, MVT::f16, Expand); | ||||
1411 | setOperationAction(ISD::SELECT, MVT::f16, Custom); | ||||
1412 | setOperationAction(ISD::SELECT_CC, MVT::f16, Custom); | ||||
1413 | } | ||||
1414 | |||||
1415 | setOperationAction(ISD::SETCCCARRY, MVT::i32, Custom); | ||||
1416 | |||||
1417 | setOperationAction(ISD::BRCOND, MVT::Other, Custom); | ||||
1418 | setOperationAction(ISD::BR_CC, MVT::i32, Custom); | ||||
1419 | if (Subtarget->hasFullFP16()) | ||||
1420 | setOperationAction(ISD::BR_CC, MVT::f16, Custom); | ||||
1421 | setOperationAction(ISD::BR_CC, MVT::f32, Custom); | ||||
1422 | setOperationAction(ISD::BR_CC, MVT::f64, Custom); | ||||
1423 | setOperationAction(ISD::BR_JT, MVT::Other, Custom); | ||||
1424 | |||||
1425 | // We don't support sin/cos/fmod/copysign/pow | ||||
1426 | setOperationAction(ISD::FSIN, MVT::f64, Expand); | ||||
1427 | setOperationAction(ISD::FSIN, MVT::f32, Expand); | ||||
1428 | setOperationAction(ISD::FCOS, MVT::f32, Expand); | ||||
1429 | setOperationAction(ISD::FCOS, MVT::f64, Expand); | ||||
1430 | setOperationAction(ISD::FSINCOS, MVT::f64, Expand); | ||||
1431 | setOperationAction(ISD::FSINCOS, MVT::f32, Expand); | ||||
1432 | setOperationAction(ISD::FREM, MVT::f64, Expand); | ||||
1433 | setOperationAction(ISD::FREM, MVT::f32, Expand); | ||||
1434 | if (!Subtarget->useSoftFloat() && Subtarget->hasVFP2Base() && | ||||
1435 | !Subtarget->isThumb1Only()) { | ||||
1436 | setOperationAction(ISD::FCOPYSIGN, MVT::f64, Custom); | ||||
1437 | setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom); | ||||
1438 | } | ||||
1439 | setOperationAction(ISD::FPOW, MVT::f64, Expand); | ||||
1440 | setOperationAction(ISD::FPOW, MVT::f32, Expand); | ||||
1441 | |||||
1442 | if (!Subtarget->hasVFP4Base()) { | ||||
1443 | setOperationAction(ISD::FMA, MVT::f64, Expand); | ||||
1444 | setOperationAction(ISD::FMA, MVT::f32, Expand); | ||||
1445 | } | ||||
1446 | |||||
1447 | // Various VFP goodness | ||||
1448 | if (!Subtarget->useSoftFloat() && !Subtarget->isThumb1Only()) { | ||||
1449 | // FP-ARMv8 adds f64 <-> f16 conversion. Before that it should be expanded. | ||||
1450 | if (!Subtarget->hasFPARMv8Base() || !Subtarget->hasFP64()) { | ||||
1451 | setOperationAction(ISD::FP16_TO_FP, MVT::f64, Expand); | ||||
1452 | setOperationAction(ISD::FP_TO_FP16, MVT::f64, Expand); | ||||
1453 | } | ||||
1454 | |||||
1455 | // fp16 is a special v7 extension that adds f16 <-> f32 conversions. | ||||
1456 | if (!Subtarget->hasFP16()) { | ||||
1457 | setOperationAction(ISD::FP16_TO_FP, MVT::f32, Expand); | ||||
1458 | setOperationAction(ISD::FP_TO_FP16, MVT::f32, Expand); | ||||
1459 | } | ||||
1460 | |||||
1461 | // Strict floating-point comparisons need custom lowering. | ||||
1462 | setOperationAction(ISD::STRICT_FSETCC, MVT::f16, Custom); | ||||
1463 | setOperationAction(ISD::STRICT_FSETCCS, MVT::f16, Custom); | ||||
1464 | setOperationAction(ISD::STRICT_FSETCC, MVT::f32, Custom); | ||||
1465 | setOperationAction(ISD::STRICT_FSETCCS, MVT::f32, Custom); | ||||
1466 | setOperationAction(ISD::STRICT_FSETCC, MVT::f64, Custom); | ||||
1467 | setOperationAction(ISD::STRICT_FSETCCS, MVT::f64, Custom); | ||||
1468 | } | ||||
1469 | |||||
1470 | // Use __sincos_stret if available. | ||||
1471 | if (getLibcallName(RTLIB::SINCOS_STRET_F32) != nullptr && | ||||
1472 | getLibcallName(RTLIB::SINCOS_STRET_F64) != nullptr) { | ||||
1473 | setOperationAction(ISD::FSINCOS, MVT::f64, Custom); | ||||
1474 | setOperationAction(ISD::FSINCOS, MVT::f32, Custom); | ||||
1475 | } | ||||
1476 | |||||
1477 | // FP-ARMv8 implements a lot of rounding-like FP operations. | ||||
1478 | if (Subtarget->hasFPARMv8Base()) { | ||||
1479 | setOperationAction(ISD::FFLOOR, MVT::f32, Legal); | ||||
1480 | setOperationAction(ISD::FCEIL, MVT::f32, Legal); | ||||
1481 | setOperationAction(ISD::FROUND, MVT::f32, Legal); | ||||
1482 | setOperationAction(ISD::FTRUNC, MVT::f32, Legal); | ||||
1483 | setOperationAction(ISD::FNEARBYINT, MVT::f32, Legal); | ||||
1484 | setOperationAction(ISD::FRINT, MVT::f32, Legal); | ||||
1485 | setOperationAction(ISD::FMINNUM, MVT::f32, Legal); | ||||
1486 | setOperationAction(ISD::FMAXNUM, MVT::f32, Legal); | ||||
1487 | if (Subtarget->hasNEON()) { | ||||
1488 | setOperationAction(ISD::FMINNUM, MVT::v2f32, Legal); | ||||
1489 | setOperationAction(ISD::FMAXNUM, MVT::v2f32, Legal); | ||||
1490 | setOperationAction(ISD::FMINNUM, MVT::v4f32, Legal); | ||||
1491 | setOperationAction(ISD::FMAXNUM, MVT::v4f32, Legal); | ||||
1492 | } | ||||
1493 | |||||
1494 | if (Subtarget->hasFP64()) { | ||||
1495 | setOperationAction(ISD::FFLOOR, MVT::f64, Legal); | ||||
1496 | setOperationAction(ISD::FCEIL, MVT::f64, Legal); | ||||
1497 | setOperationAction(ISD::FROUND, MVT::f64, Legal); | ||||
1498 | setOperationAction(ISD::FTRUNC, MVT::f64, Legal); | ||||
1499 | setOperationAction(ISD::FNEARBYINT, MVT::f64, Legal); | ||||
1500 | setOperationAction(ISD::FRINT, MVT::f64, Legal); | ||||
1501 | setOperationAction(ISD::FMINNUM, MVT::f64, Legal); | ||||
1502 | setOperationAction(ISD::FMAXNUM, MVT::f64, Legal); | ||||
1503 | } | ||||
1504 | } | ||||
1505 | |||||
1506 | // FP16 often need to be promoted to call lib functions | ||||
1507 | if (Subtarget->hasFullFP16()) { | ||||
1508 | setOperationAction(ISD::FREM, MVT::f16, Promote); | ||||
1509 | setOperationAction(ISD::FCOPYSIGN, MVT::f16, Expand); | ||||
1510 | setOperationAction(ISD::FSIN, MVT::f16, Promote); | ||||
1511 | setOperationAction(ISD::FCOS, MVT::f16, Promote); | ||||
1512 | setOperationAction(ISD::FSINCOS, MVT::f16, Promote); | ||||
1513 | setOperationAction(ISD::FPOWI, MVT::f16, Promote); | ||||
1514 | setOperationAction(ISD::FPOW, MVT::f16, Promote); | ||||
1515 | setOperationAction(ISD::FEXP, MVT::f16, Promote); | ||||
1516 | setOperationAction(ISD::FEXP2, MVT::f16, Promote); | ||||
1517 | setOperationAction(ISD::FLOG, MVT::f16, Promote); | ||||
1518 | setOperationAction(ISD::FLOG10, MVT::f16, Promote); | ||||
1519 | setOperationAction(ISD::FLOG2, MVT::f16, Promote); | ||||
1520 | |||||
1521 | setOperationAction(ISD::FROUND, MVT::f16, Legal); | ||||
1522 | } | ||||
1523 | |||||
1524 | if (Subtarget->hasNEON()) { | ||||
1525 | // vmin and vmax aren't available in a scalar form, so we can use | ||||
1526 | // a NEON instruction with an undef lane instead. This has a performance | ||||
1527 | // penalty on some cores, so we don't do this unless we have been | ||||
1528 | // asked to by the core tuning model. | ||||
1529 | if (Subtarget->useNEONForSinglePrecisionFP()) { | ||||
1530 | setOperationAction(ISD::FMINIMUM, MVT::f32, Legal); | ||||
1531 | setOperationAction(ISD::FMAXIMUM, MVT::f32, Legal); | ||||
1532 | setOperationAction(ISD::FMINIMUM, MVT::f16, Legal); | ||||
1533 | setOperationAction(ISD::FMAXIMUM, MVT::f16, Legal); | ||||
1534 | } | ||||
1535 | setOperationAction(ISD::FMINIMUM, MVT::v2f32, Legal); | ||||
1536 | setOperationAction(ISD::FMAXIMUM, MVT::v2f32, Legal); | ||||
1537 | setOperationAction(ISD::FMINIMUM, MVT::v4f32, Legal); | ||||
1538 | setOperationAction(ISD::FMAXIMUM, MVT::v4f32, Legal); | ||||
1539 | |||||
1540 | if (Subtarget->hasFullFP16()) { | ||||
1541 | setOperationAction(ISD::FMINNUM, MVT::v4f16, Legal); | ||||
1542 | setOperationAction(ISD::FMAXNUM, MVT::v4f16, Legal); | ||||
1543 | setOperationAction(ISD::FMINNUM, MVT::v8f16, Legal); | ||||
1544 | setOperationAction(ISD::FMAXNUM, MVT::v8f16, Legal); | ||||
1545 | |||||
1546 | setOperationAction(ISD::FMINIMUM, MVT::v4f16, Legal); | ||||
1547 | setOperationAction(ISD::FMAXIMUM, MVT::v4f16, Legal); | ||||
1548 | setOperationAction(ISD::FMINIMUM, MVT::v8f16, Legal); | ||||
1549 | setOperationAction(ISD::FMAXIMUM, MVT::v8f16, Legal); | ||||
1550 | } | ||||
1551 | } | ||||
1552 | |||||
1553 | // We have target-specific dag combine patterns for the following nodes: | ||||
1554 | // ARMISD::VMOVRRD - No need to call setTargetDAGCombine | ||||
1555 | setTargetDAGCombine( | ||||
1556 | {ISD::ADD, ISD::SUB, ISD::MUL, ISD::AND, ISD::OR, ISD::XOR}); | ||||
1557 | |||||
1558 | if (Subtarget->hasMVEIntegerOps()) | ||||
1559 | setTargetDAGCombine(ISD::VSELECT); | ||||
1560 | |||||
1561 | if (Subtarget->hasV6Ops()) | ||||
1562 | setTargetDAGCombine(ISD::SRL); | ||||
1563 | if (Subtarget->isThumb1Only()) | ||||
1564 | setTargetDAGCombine(ISD::SHL); | ||||
1565 | // Attempt to lower smin/smax to ssat/usat | ||||
1566 | if ((!Subtarget->isThumb() && Subtarget->hasV6Ops()) || | ||||
1567 | Subtarget->isThumb2()) { | ||||
1568 | setTargetDAGCombine({ISD::SMIN, ISD::SMAX}); | ||||
1569 | } | ||||
1570 | |||||
1571 | setStackPointerRegisterToSaveRestore(ARM::SP); | ||||
1572 | |||||
1573 | if (Subtarget->useSoftFloat() || Subtarget->isThumb1Only() || | ||||
1574 | !Subtarget->hasVFP2Base() || Subtarget->hasMinSize()) | ||||
1575 | setSchedulingPreference(Sched::RegPressure); | ||||
1576 | else | ||||
1577 | setSchedulingPreference(Sched::Hybrid); | ||||
1578 | |||||
1579 | //// temporary - rewrite interface to use type | ||||
1580 | MaxStoresPerMemset = 8; | ||||
1581 | MaxStoresPerMemsetOptSize = 4; | ||||
1582 | MaxStoresPerMemcpy = 4; // For @llvm.memcpy -> sequence of stores | ||||
1583 | MaxStoresPerMemcpyOptSize = 2; | ||||
1584 | MaxStoresPerMemmove = 4; // For @llvm.memmove -> sequence of stores | ||||
1585 | MaxStoresPerMemmoveOptSize = 2; | ||||
1586 | |||||
1587 | // On ARM arguments smaller than 4 bytes are extended, so all arguments | ||||
1588 | // are at least 4 bytes aligned. | ||||
1589 | setMinStackArgumentAlignment(Align(4)); | ||||
1590 | |||||
1591 | // Prefer likely predicted branches to selects on out-of-order cores. | ||||
1592 | PredictableSelectIsExpensive = Subtarget->getSchedModel().isOutOfOrder(); | ||||
1593 | |||||
1594 | setPrefLoopAlignment(Align(1ULL << Subtarget->getPrefLoopLogAlignment())); | ||||
1595 | |||||
1596 | setMinFunctionAlignment(Subtarget->isThumb() ? Align(2) : Align(4)); | ||||
1597 | |||||
1598 | if (Subtarget->isThumb() || Subtarget->isThumb2()) | ||||
1599 | setTargetDAGCombine(ISD::ABS); | ||||
1600 | } | ||||
1601 | |||||
1602 | bool ARMTargetLowering::useSoftFloat() const { | ||||
1603 | return Subtarget->useSoftFloat(); | ||||
1604 | } | ||||
1605 | |||||
1606 | // FIXME: It might make sense to define the representative register class as the | ||||
1607 | // nearest super-register that has a non-null superset. For example, DPR_VFP2 is | ||||
1608 | // a super-register of SPR, and DPR is a superset if DPR_VFP2. Consequently, | ||||
1609 | // SPR's representative would be DPR_VFP2. This should work well if register | ||||
1610 | // pressure tracking were modified such that a register use would increment the | ||||
1611 | // pressure of the register class's representative and all of it's super | ||||
1612 | // classes' representatives transitively. We have not implemented this because | ||||
1613 | // of the difficulty prior to coalescing of modeling operand register classes | ||||
1614 | // due to the common occurrence of cross class copies and subregister insertions | ||||
1615 | // and extractions. | ||||
1616 | std::pair<const TargetRegisterClass *, uint8_t> | ||||
1617 | ARMTargetLowering::findRepresentativeClass(const TargetRegisterInfo *TRI, | ||||
1618 | MVT VT) const { | ||||
1619 | const TargetRegisterClass *RRC = nullptr; | ||||
1620 | uint8_t Cost = 1; | ||||
1621 | switch (VT.SimpleTy) { | ||||
1622 | default: | ||||
1623 | return TargetLowering::findRepresentativeClass(TRI, VT); | ||||
1624 | // Use DPR as representative register class for all floating point | ||||
1625 | // and vector types. Since there are 32 SPR registers and 32 DPR registers so | ||||
1626 | // the cost is 1 for both f32 and f64. | ||||
1627 | case MVT::f32: case MVT::f64: case MVT::v8i8: case MVT::v4i16: | ||||
1628 | case MVT::v2i32: case MVT::v1i64: case MVT::v2f32: | ||||
1629 | RRC = &ARM::DPRRegClass; | ||||
1630 | // When NEON is used for SP, only half of the register file is available | ||||
1631 | // because operations that define both SP and DP results will be constrained | ||||
1632 | // to the VFP2 class (D0-D15). We currently model this constraint prior to | ||||
1633 | // coalescing by double-counting the SP regs. See the FIXME above. | ||||
1634 | if (Subtarget->useNEONForSinglePrecisionFP()) | ||||
1635 | Cost = 2; | ||||
1636 | break; | ||||
1637 | case MVT::v16i8: case MVT::v8i16: case MVT::v4i32: case MVT::v2i64: | ||||
1638 | case MVT::v4f32: case MVT::v2f64: | ||||
1639 | RRC = &ARM::DPRRegClass; | ||||
1640 | Cost = 2; | ||||
1641 | break; | ||||
1642 | case MVT::v4i64: | ||||
1643 | RRC = &ARM::DPRRegClass; | ||||
1644 | Cost = 4; | ||||
1645 | break; | ||||
1646 | case MVT::v8i64: | ||||
1647 | RRC = &ARM::DPRRegClass; | ||||
1648 | Cost = 8; | ||||
1649 | break; | ||||
1650 | } | ||||
1651 | return std::make_pair(RRC, Cost); | ||||
1652 | } | ||||
1653 | |||||
1654 | const char *ARMTargetLowering::getTargetNodeName(unsigned Opcode) const { | ||||
1655 | #define MAKE_CASE(V) \ | ||||
1656 | case V: \ | ||||
1657 | return #V; | ||||
1658 | switch ((ARMISD::NodeType)Opcode) { | ||||
1659 | case ARMISD::FIRST_NUMBER: | ||||
1660 | break; | ||||
1661 | MAKE_CASE(ARMISD::Wrapper) | ||||
1662 | MAKE_CASE(ARMISD::WrapperPIC) | ||||
1663 | MAKE_CASE(ARMISD::WrapperJT) | ||||
1664 | MAKE_CASE(ARMISD::COPY_STRUCT_BYVAL) | ||||
1665 | MAKE_CASE(ARMISD::CALL) | ||||
1666 | MAKE_CASE(ARMISD::CALL_PRED) | ||||
1667 | MAKE_CASE(ARMISD::CALL_NOLINK) | ||||
1668 | MAKE_CASE(ARMISD::tSECALL) | ||||
1669 | MAKE_CASE(ARMISD::t2CALL_BTI) | ||||
1670 | MAKE_CASE(ARMISD::BRCOND) | ||||
1671 | MAKE_CASE(ARMISD::BR_JT) | ||||
1672 | MAKE_CASE(ARMISD::BR2_JT) | ||||
1673 | MAKE_CASE(ARMISD::RET_FLAG) | ||||
1674 | MAKE_CASE(ARMISD::SERET_FLAG) | ||||
1675 | MAKE_CASE(ARMISD::INTRET_FLAG) | ||||
1676 | MAKE_CASE(ARMISD::PIC_ADD) | ||||
1677 | MAKE_CASE(ARMISD::CMP) | ||||
1678 | MAKE_CASE(ARMISD::CMN) | ||||
1679 | MAKE_CASE(ARMISD::CMPZ) | ||||
1680 | MAKE_CASE(ARMISD::CMPFP) | ||||
1681 | MAKE_CASE(ARMISD::CMPFPE) | ||||
1682 | MAKE_CASE(ARMISD::CMPFPw0) | ||||
1683 | MAKE_CASE(ARMISD::CMPFPEw0) | ||||
1684 | MAKE_CASE(ARMISD::BCC_i64) | ||||
1685 | MAKE_CASE(ARMISD::FMSTAT) | ||||
1686 | MAKE_CASE(ARMISD::CMOV) | ||||
1687 | MAKE_CASE(ARMISD::SUBS) | ||||
1688 | MAKE_CASE(ARMISD::SSAT) | ||||
1689 | MAKE_CASE(ARMISD::USAT) | ||||
1690 | MAKE_CASE(ARMISD::ASRL) | ||||
1691 | MAKE_CASE(ARMISD::LSRL) | ||||
1692 | MAKE_CASE(ARMISD::LSLL) | ||||
1693 | MAKE_CASE(ARMISD::SRL_FLAG) | ||||
1694 | MAKE_CASE(ARMISD::SRA_FLAG) | ||||
1695 | MAKE_CASE(ARMISD::RRX) | ||||
1696 | MAKE_CASE(ARMISD::ADDC) | ||||
1697 | MAKE_CASE(ARMISD::ADDE) | ||||
1698 | MAKE_CASE(ARMISD::SUBC) | ||||
1699 | MAKE_CASE(ARMISD::SUBE) | ||||
1700 | MAKE_CASE(ARMISD::LSLS) | ||||
1701 | MAKE_CASE(ARMISD::VMOVRRD) | ||||
1702 | MAKE_CASE(ARMISD::VMOVDRR) | ||||
1703 | MAKE_CASE(ARMISD::VMOVhr) | ||||
1704 | MAKE_CASE(ARMISD::VMOVrh) | ||||
1705 | MAKE_CASE(ARMISD::VMOVSR) | ||||
1706 | MAKE_CASE(ARMISD::EH_SJLJ_SETJMP) | ||||
1707 | MAKE_CASE(ARMISD::EH_SJLJ_LONGJMP) | ||||
1708 | MAKE_CASE(ARMISD::EH_SJLJ_SETUP_DISPATCH) | ||||
1709 | MAKE_CASE(ARMISD::TC_RETURN) | ||||
1710 | MAKE_CASE(ARMISD::THREAD_POINTER) | ||||
1711 | MAKE_CASE(ARMISD::DYN_ALLOC) | ||||
1712 | MAKE_CASE(ARMISD::MEMBARRIER_MCR) | ||||
1713 | MAKE_CASE(ARMISD::PRELOAD) | ||||
1714 | MAKE_CASE(ARMISD::LDRD) | ||||
1715 | MAKE_CASE(ARMISD::STRD) | ||||
1716 | MAKE_CASE(ARMISD::WIN__CHKSTK) | ||||
1717 | MAKE_CASE(ARMISD::WIN__DBZCHK) | ||||
1718 | MAKE_CASE(ARMISD::PREDICATE_CAST) | ||||
1719 | MAKE_CASE(ARMISD::VECTOR_REG_CAST) | ||||
1720 | MAKE_CASE(ARMISD::MVESEXT) | ||||
1721 | MAKE_CASE(ARMISD::MVEZEXT) | ||||
1722 | MAKE_CASE(ARMISD::MVETRUNC) | ||||
1723 | MAKE_CASE(ARMISD::VCMP) | ||||
1724 | MAKE_CASE(ARMISD::VCMPZ) | ||||
1725 | MAKE_CASE(ARMISD::VTST) | ||||
1726 | MAKE_CASE(ARMISD::VSHLs) | ||||
1727 | MAKE_CASE(ARMISD::VSHLu) | ||||
1728 | MAKE_CASE(ARMISD::VSHLIMM) | ||||
1729 | MAKE_CASE(ARMISD::VSHRsIMM) | ||||
1730 | MAKE_CASE(ARMISD::VSHRuIMM) | ||||
1731 | MAKE_CASE(ARMISD::VRSHRsIMM) | ||||
1732 | MAKE_CASE(ARMISD::VRSHRuIMM) | ||||
1733 | MAKE_CASE(ARMISD::VRSHRNIMM) | ||||
1734 | MAKE_CASE(ARMISD::VQSHLsIMM) | ||||
1735 | MAKE_CASE(ARMISD::VQSHLuIMM) | ||||
1736 | MAKE_CASE(ARMISD::VQSHLsuIMM) | ||||
1737 | MAKE_CASE(ARMISD::VQSHRNsIMM) | ||||
1738 | MAKE_CASE(ARMISD::VQSHRNuIMM) | ||||
1739 | MAKE_CASE(ARMISD::VQSHRNsuIMM) | ||||
1740 | MAKE_CASE(ARMISD::VQRSHRNsIMM) | ||||
1741 | MAKE_CASE(ARMISD::VQRSHRNuIMM) | ||||
1742 | MAKE_CASE(ARMISD::VQRSHRNsuIMM) | ||||
1743 | MAKE_CASE(ARMISD::VSLIIMM) | ||||
1744 | MAKE_CASE(ARMISD::VSRIIMM) | ||||
1745 | MAKE_CASE(ARMISD::VGETLANEu) | ||||
1746 | MAKE_CASE(ARMISD::VGETLANEs) | ||||
1747 | MAKE_CASE(ARMISD::VMOVIMM) | ||||
1748 | MAKE_CASE(ARMISD::VMVNIMM) | ||||
1749 | MAKE_CASE(ARMISD::VMOVFPIMM) | ||||
1750 | MAKE_CASE(ARMISD::VDUP) | ||||
1751 | MAKE_CASE(ARMISD::VDUPLANE) | ||||
1752 | MAKE_CASE(ARMISD::VEXT) | ||||
1753 | MAKE_CASE(ARMISD::VREV64) | ||||
1754 | MAKE_CASE(ARMISD::VREV32) | ||||
1755 | MAKE_CASE(ARMISD::VREV16) | ||||
1756 | MAKE_CASE(ARMISD::VZIP) | ||||
1757 | MAKE_CASE(ARMISD::VUZP) | ||||
1758 | MAKE_CASE(ARMISD::VTRN) | ||||
1759 | MAKE_CASE(ARMISD::VTBL1) | ||||
1760 | MAKE_CASE(ARMISD::VTBL2) | ||||
1761 | MAKE_CASE(ARMISD::VMOVN) | ||||
1762 | MAKE_CASE(ARMISD::VQMOVNs) | ||||
1763 | MAKE_CASE(ARMISD::VQMOVNu) | ||||
1764 | MAKE_CASE(ARMISD::VCVTN) | ||||
1765 | MAKE_CASE(ARMISD::VCVTL) | ||||
1766 | MAKE_CASE(ARMISD::VIDUP) | ||||
1767 | MAKE_CASE(ARMISD::VMULLs) | ||||
1768 | MAKE_CASE(ARMISD::VMULLu) | ||||
1769 | MAKE_CASE(ARMISD::VQDMULH) | ||||
1770 | MAKE_CASE(ARMISD::VADDVs) | ||||
1771 | MAKE_CASE(ARMISD::VADDVu) | ||||
1772 | MAKE_CASE(ARMISD::VADDVps) | ||||
1773 | MAKE_CASE(ARMISD::VADDVpu) | ||||
1774 | MAKE_CASE(ARMISD::VADDLVs) | ||||
1775 | MAKE_CASE(ARMISD::VADDLVu) | ||||
1776 | MAKE_CASE(ARMISD::VADDLVAs) | ||||
1777 | MAKE_CASE(ARMISD::VADDLVAu) | ||||
1778 | MAKE_CASE(ARMISD::VADDLVps) | ||||
1779 | MAKE_CASE(ARMISD::VADDLVpu) | ||||
1780 | MAKE_CASE(ARMISD::VADDLVAps) | ||||
1781 | MAKE_CASE(ARMISD::VADDLVApu) | ||||
1782 | MAKE_CASE(ARMISD::VMLAVs) | ||||
1783 | MAKE_CASE(ARMISD::VMLAVu) | ||||
1784 | MAKE_CASE(ARMISD::VMLAVps) | ||||
1785 | MAKE_CASE(ARMISD::VMLAVpu) | ||||
1786 | MAKE_CASE(ARMISD::VMLALVs) | ||||
1787 | MAKE_CASE(ARMISD::VMLALVu) | ||||
1788 | MAKE_CASE(ARMISD::VMLALVps) | ||||
1789 | MAKE_CASE(ARMISD::VMLALVpu) | ||||
1790 | MAKE_CASE(ARMISD::VMLALVAs) | ||||
1791 | MAKE_CASE(ARMISD::VMLALVAu) | ||||
1792 | MAKE_CASE(ARMISD::VMLALVAps) | ||||
1793 | MAKE_CASE(ARMISD::VMLALVApu) | ||||
1794 | MAKE_CASE(ARMISD::VMINVu) | ||||
1795 | MAKE_CASE(ARMISD::VMINVs) | ||||
1796 | MAKE_CASE(ARMISD::VMAXVu) | ||||
1797 | MAKE_CASE(ARMISD::VMAXVs) | ||||
1798 | MAKE_CASE(ARMISD::UMAAL) | ||||
1799 | MAKE_CASE(ARMISD::UMLAL) | ||||
1800 | MAKE_CASE(ARMISD::SMLAL) | ||||
1801 | MAKE_CASE(ARMISD::SMLALBB) | ||||
1802 | MAKE_CASE(ARMISD::SMLALBT) | ||||
1803 | MAKE_CASE(ARMISD::SMLALTB) | ||||
1804 | MAKE_CASE(ARMISD::SMLALTT) | ||||
1805 | MAKE_CASE(ARMISD::SMULWB) | ||||
1806 | MAKE_CASE(ARMISD::SMULWT) | ||||
1807 | MAKE_CASE(ARMISD::SMLALD) | ||||
1808 | MAKE_CASE(ARMISD::SMLALDX) | ||||
1809 | MAKE_CASE(ARMISD::SMLSLD) | ||||
1810 | MAKE_CASE(ARMISD::SMLSLDX) | ||||
1811 | MAKE_CASE(ARMISD::SMMLAR) | ||||
1812 | MAKE_CASE(ARMISD::SMMLSR) | ||||
1813 | MAKE_CASE(ARMISD::QADD16b) | ||||
1814 | MAKE_CASE(ARMISD::QSUB16b) | ||||
1815 | MAKE_CASE(ARMISD::QADD8b) | ||||
1816 | MAKE_CASE(ARMISD::QSUB8b) | ||||
1817 | MAKE_CASE(ARMISD::UQADD16b) | ||||
1818 | MAKE_CASE(ARMISD::UQSUB16b) | ||||
1819 | MAKE_CASE(ARMISD::UQADD8b) | ||||
1820 | MAKE_CASE(ARMISD::UQSUB8b) | ||||
1821 | MAKE_CASE(ARMISD::BUILD_VECTOR) | ||||
1822 | MAKE_CASE(ARMISD::BFI) | ||||
1823 | MAKE_CASE(ARMISD::VORRIMM) | ||||
1824 | MAKE_CASE(ARMISD::VBICIMM) | ||||
1825 | MAKE_CASE(ARMISD::VBSP) | ||||
1826 | MAKE_CASE(ARMISD::MEMCPY) | ||||
1827 | MAKE_CASE(ARMISD::VLD1DUP) | ||||
1828 | MAKE_CASE(ARMISD::VLD2DUP) | ||||
1829 | MAKE_CASE(ARMISD::VLD3DUP) | ||||
1830 | MAKE_CASE(ARMISD::VLD4DUP) | ||||
1831 | MAKE_CASE(ARMISD::VLD1_UPD) | ||||
1832 | MAKE_CASE(ARMISD::VLD2_UPD) | ||||
1833 | MAKE_CASE(ARMISD::VLD3_UPD) | ||||
1834 | MAKE_CASE(ARMISD::VLD4_UPD) | ||||
1835 | MAKE_CASE(ARMISD::VLD1x2_UPD) | ||||
1836 | MAKE_CASE(ARMISD::VLD1x3_UPD) | ||||
1837 | MAKE_CASE(ARMISD::VLD1x4_UPD) | ||||
1838 | MAKE_CASE(ARMISD::VLD2LN_UPD) | ||||
1839 | MAKE_CASE(ARMISD::VLD3LN_UPD) | ||||
1840 | MAKE_CASE(ARMISD::VLD4LN_UPD) | ||||
1841 | MAKE_CASE(ARMISD::VLD1DUP_UPD) | ||||
1842 | MAKE_CASE(ARMISD::VLD2DUP_UPD) | ||||
1843 | MAKE_CASE(ARMISD::VLD3DUP_UPD) | ||||
1844 | MAKE_CASE(ARMISD::VLD4DUP_UPD) | ||||
1845 | MAKE_CASE(ARMISD::VST1_UPD) | ||||
1846 | MAKE_CASE(ARMISD::VST2_UPD) | ||||
1847 | MAKE_CASE(ARMISD::VST3_UPD) | ||||
1848 | MAKE_CASE(ARMISD::VST4_UPD) | ||||
1849 | MAKE_CASE(ARMISD::VST1x2_UPD) | ||||
1850 | MAKE_CASE(ARMISD::VST1x3_UPD) | ||||
1851 | MAKE_CASE(ARMISD::VST1x4_UPD) | ||||
1852 | MAKE_CASE(ARMISD::VST2LN_UPD) | ||||
1853 | MAKE_CASE(ARMISD::VST3LN_UPD) | ||||
1854 | MAKE_CASE(ARMISD::VST4LN_UPD) | ||||
1855 | MAKE_CASE(ARMISD::WLS) | ||||
1856 | MAKE_CASE(ARMISD::WLSSETUP) | ||||
1857 | MAKE_CASE(ARMISD::LE) | ||||
1858 | MAKE_CASE(ARMISD::LOOP_DEC) | ||||
1859 | MAKE_CASE(ARMISD::CSINV) | ||||
1860 | MAKE_CASE(ARMISD::CSNEG) | ||||
1861 | MAKE_CASE(ARMISD::CSINC) | ||||
1862 | MAKE_CASE(ARMISD::MEMCPYLOOP) | ||||
1863 | MAKE_CASE(ARMISD::MEMSETLOOP) | ||||
1864 | #undef MAKE_CASE | ||||
1865 | } | ||||
1866 | return nullptr; | ||||
1867 | } | ||||
1868 | |||||
1869 | EVT ARMTargetLowering::getSetCCResultType(const DataLayout &DL, LLVMContext &, | ||||
1870 | EVT VT) const { | ||||
1871 | if (!VT.isVector()) | ||||
1872 | return getPointerTy(DL); | ||||
1873 | |||||
1874 | // MVE has a predicate register. | ||||
1875 | if ((Subtarget->hasMVEIntegerOps() && | ||||
1876 | (VT == MVT::v2i64 || VT == MVT::v4i32 || VT == MVT::v8i16 || | ||||
1877 | VT == MVT::v16i8)) || | ||||
1878 | (Subtarget->hasMVEFloatOps() && | ||||
1879 | (VT == MVT::v2f64 || VT == MVT::v4f32 || VT == MVT::v8f16))) | ||||
1880 | return MVT::getVectorVT(MVT::i1, VT.getVectorElementCount()); | ||||
1881 | return VT.changeVectorElementTypeToInteger(); | ||||
1882 | } | ||||
1883 | |||||
1884 | /// getRegClassFor - Return the register class that should be used for the | ||||
1885 | /// specified value type. | ||||
1886 | const TargetRegisterClass * | ||||
1887 | ARMTargetLowering::getRegClassFor(MVT VT, bool isDivergent) const { | ||||
1888 | (void)isDivergent; | ||||
1889 | // Map v4i64 to QQ registers but do not make the type legal. Similarly map | ||||
1890 | // v8i64 to QQQQ registers. v4i64 and v8i64 are only used for REG_SEQUENCE to | ||||
1891 | // load / store 4 to 8 consecutive NEON D registers, or 2 to 4 consecutive | ||||
1892 | // MVE Q registers. | ||||
1893 | if (Subtarget->hasNEON()) { | ||||
1894 | if (VT == MVT::v4i64) | ||||
1895 | return &ARM::QQPRRegClass; | ||||
1896 | if (VT == MVT::v8i64) | ||||
1897 | return &ARM::QQQQPRRegClass; | ||||
1898 | } | ||||
1899 | if (Subtarget->hasMVEIntegerOps()) { | ||||
1900 | if (VT == MVT::v4i64) | ||||
1901 | return &ARM::MQQPRRegClass; | ||||
1902 | if (VT == MVT::v8i64) | ||||
1903 | return &ARM::MQQQQPRRegClass; | ||||
1904 | } | ||||
1905 | return TargetLowering::getRegClassFor(VT); | ||||
1906 | } | ||||
1907 | |||||
1908 | // memcpy, and other memory intrinsics, typically tries to use LDM/STM if the | ||||
1909 | // source/dest is aligned and the copy size is large enough. We therefore want | ||||
1910 | // to align such objects passed to memory intrinsics. | ||||
1911 | bool ARMTargetLowering::shouldAlignPointerArgs(CallInst *CI, unsigned &MinSize, | ||||
1912 | unsigned &PrefAlign) const { | ||||
1913 | if (!isa<MemIntrinsic>(CI)) | ||||
1914 | return false; | ||||
1915 | MinSize = 8; | ||||
1916 | // On ARM11 onwards (excluding M class) 8-byte aligned LDM is typically 1 | ||||
1917 | // cycle faster than 4-byte aligned LDM. | ||||
1918 | PrefAlign = (Subtarget->hasV6Ops() && !Subtarget->isMClass() ? 8 : 4); | ||||
1919 | return true; | ||||
1920 | } | ||||
1921 | |||||
1922 | // Create a fast isel object. | ||||
1923 | FastISel * | ||||
1924 | ARMTargetLowering::createFastISel(FunctionLoweringInfo &funcInfo, | ||||
1925 | const TargetLibraryInfo *libInfo) const { | ||||
1926 | return ARM::createFastISel(funcInfo, libInfo); | ||||
1927 | } | ||||
1928 | |||||
1929 | Sched::Preference ARMTargetLowering::getSchedulingPreference(SDNode *N) const { | ||||
1930 | unsigned NumVals = N->getNumValues(); | ||||
1931 | if (!NumVals) | ||||
1932 | return Sched::RegPressure; | ||||
1933 | |||||
1934 | for (unsigned i = 0; i != NumVals; ++i) { | ||||
1935 | EVT VT = N->getValueType(i); | ||||
1936 | if (VT == MVT::Glue || VT == MVT::Other) | ||||
1937 | continue; | ||||
1938 | if (VT.isFloatingPoint() || VT.isVector()) | ||||
1939 | return Sched::ILP; | ||||
1940 | } | ||||
1941 | |||||
1942 | if (!N->isMachineOpcode()) | ||||
1943 | return Sched::RegPressure; | ||||
1944 | |||||
1945 | // Load are scheduled for latency even if there instruction itinerary | ||||
1946 | // is not available. | ||||
1947 | const TargetInstrInfo *TII = Subtarget->getInstrInfo(); | ||||
1948 | const MCInstrDesc &MCID = TII->get(N->getMachineOpcode()); | ||||
1949 | |||||
1950 | if (MCID.getNumDefs() == 0) | ||||
1951 | return Sched::RegPressure; | ||||
1952 | if (!Itins->isEmpty() && | ||||
1953 | Itins->getOperandCycle(MCID.getSchedClass(), 0) > 2) | ||||
1954 | return Sched::ILP; | ||||
1955 | |||||
1956 | return Sched::RegPressure; | ||||
1957 | } | ||||
1958 | |||||
1959 | //===----------------------------------------------------------------------===// | ||||
1960 | // Lowering Code | ||||
1961 | //===----------------------------------------------------------------------===// | ||||
1962 | |||||
1963 | static bool isSRL16(const SDValue &Op) { | ||||
1964 | if (Op.getOpcode() != ISD::SRL) | ||||
1965 | return false; | ||||
1966 | if (auto Const = dyn_cast<ConstantSDNode>(Op.getOperand(1))) | ||||
1967 | return Const->getZExtValue() == 16; | ||||
1968 | return false; | ||||
1969 | } | ||||
1970 | |||||
1971 | static bool isSRA16(const SDValue &Op) { | ||||
1972 | if (Op.getOpcode() != ISD::SRA) | ||||
1973 | return false; | ||||
1974 | if (auto Const = dyn_cast<ConstantSDNode>(Op.getOperand(1))) | ||||
1975 | return Const->getZExtValue() == 16; | ||||
1976 | return false; | ||||
1977 | } | ||||
1978 | |||||
1979 | static bool isSHL16(const SDValue &Op) { | ||||
1980 | if (Op.getOpcode() != ISD::SHL) | ||||
1981 | return false; | ||||
1982 | if (auto Const = dyn_cast<ConstantSDNode>(Op.getOperand(1))) | ||||
1983 | return Const->getZExtValue() == 16; | ||||
1984 | return false; | ||||
1985 | } | ||||
1986 | |||||
1987 | // Check for a signed 16-bit value. We special case SRA because it makes it | ||||
1988 | // more simple when also looking for SRAs that aren't sign extending a | ||||
1989 | // smaller value. Without the check, we'd need to take extra care with | ||||
1990 | // checking order for some operations. | ||||
1991 | static bool isS16(const SDValue &Op, SelectionDAG &DAG) { | ||||
1992 | if (isSRA16(Op)) | ||||
1993 | return isSHL16(Op.getOperand(0)); | ||||
1994 | return DAG.ComputeNumSignBits(Op) == 17; | ||||
1995 | } | ||||
1996 | |||||
1997 | /// IntCCToARMCC - Convert a DAG integer condition code to an ARM CC | ||||
1998 | static ARMCC::CondCodes IntCCToARMCC(ISD::CondCode CC) { | ||||
1999 | switch (CC) { | ||||
2000 | default: llvm_unreachable("Unknown condition code!")::llvm::llvm_unreachable_internal("Unknown condition code!", "llvm/lib/Target/ARM/ARMISelLowering.cpp" , 2000); | ||||
2001 | case ISD::SETNE: return ARMCC::NE; | ||||
2002 | case ISD::SETEQ: return ARMCC::EQ; | ||||
2003 | case ISD::SETGT: return ARMCC::GT; | ||||
2004 | case ISD::SETGE: return ARMCC::GE; | ||||
2005 | case ISD::SETLT: return ARMCC::LT; | ||||
2006 | case ISD::SETLE: return ARMCC::LE; | ||||
2007 | case ISD::SETUGT: return ARMCC::HI; | ||||
2008 | case ISD::SETUGE: return ARMCC::HS; | ||||
2009 | case ISD::SETULT: return ARMCC::LO; | ||||
2010 | case ISD::SETULE: return ARMCC::LS; | ||||
2011 | } | ||||
2012 | } | ||||
2013 | |||||
2014 | /// FPCCToARMCC - Convert a DAG fp condition code to an ARM CC. | ||||
2015 | static void FPCCToARMCC(ISD::CondCode CC, ARMCC::CondCodes &CondCode, | ||||
2016 | ARMCC::CondCodes &CondCode2) { | ||||
2017 | CondCode2 = ARMCC::AL; | ||||
2018 | switch (CC) { | ||||
2019 | default: llvm_unreachable("Unknown FP condition!")::llvm::llvm_unreachable_internal("Unknown FP condition!", "llvm/lib/Target/ARM/ARMISelLowering.cpp" , 2019); | ||||
2020 | case ISD::SETEQ: | ||||
2021 | case ISD::SETOEQ: CondCode = ARMCC::EQ; break; | ||||
2022 | case ISD::SETGT: | ||||
2023 | case ISD::SETOGT: CondCode = ARMCC::GT; break; | ||||
2024 | case ISD::SETGE: | ||||
2025 | case ISD::SETOGE: CondCode = ARMCC::GE; break; | ||||
2026 | case ISD::SETOLT: CondCode = ARMCC::MI; break; | ||||
2027 | case ISD::SETOLE: CondCode = ARMCC::LS; break; | ||||
2028 | case ISD::SETONE: CondCode = ARMCC::MI; CondCode2 = ARMCC::GT; break; | ||||
2029 | case ISD::SETO: CondCode = ARMCC::VC; break; | ||||
2030 | case ISD::SETUO: CondCode = ARMCC::VS; break; | ||||
2031 | case ISD::SETUEQ: CondCode = ARMCC::EQ; CondCode2 = ARMCC::VS; break; | ||||
2032 | case ISD::SETUGT: CondCode = ARMCC::HI; break; | ||||
2033 | case ISD::SETUGE: CondCode = ARMCC::PL; break; | ||||
2034 | case ISD::SETLT: | ||||
2035 | case ISD::SETULT: CondCode = ARMCC::LT; break; | ||||
2036 | case ISD::SETLE: | ||||
2037 | case ISD::SETULE: CondCode = ARMCC::LE; break; | ||||
2038 | case ISD::SETNE: | ||||
2039 | case ISD::SETUNE: CondCode = ARMCC::NE; break; | ||||
2040 | } | ||||
2041 | } | ||||
2042 | |||||
2043 | //===----------------------------------------------------------------------===// | ||||
2044 | // Calling Convention Implementation | ||||
2045 | //===----------------------------------------------------------------------===// | ||||
2046 | |||||
2047 | /// getEffectiveCallingConv - Get the effective calling convention, taking into | ||||
2048 | /// account presence of floating point hardware and calling convention | ||||
2049 | /// limitations, such as support for variadic functions. | ||||
2050 | CallingConv::ID | ||||
2051 | ARMTargetLowering::getEffectiveCallingConv(CallingConv::ID CC, | ||||
2052 | bool isVarArg) const { | ||||
2053 | switch (CC) { | ||||
2054 | default: | ||||
2055 | report_fatal_error("Unsupported calling convention"); | ||||
2056 | case CallingConv::ARM_AAPCS: | ||||
2057 | case CallingConv::ARM_APCS: | ||||
2058 | case CallingConv::GHC: | ||||
2059 | case CallingConv::CFGuard_Check: | ||||
2060 | return CC; | ||||
2061 | case CallingConv::PreserveMost: | ||||
2062 | return CallingConv::PreserveMost; | ||||
2063 | case CallingConv::ARM_AAPCS_VFP: | ||||
2064 | case CallingConv::Swift: | ||||
2065 | case CallingConv::SwiftTail: | ||||
2066 | return isVarArg ? CallingConv::ARM_AAPCS : CallingConv::ARM_AAPCS_VFP; | ||||
2067 | case CallingConv::C: | ||||
2068 | case CallingConv::Tail: | ||||
2069 | if (!Subtarget->isAAPCS_ABI()) | ||||
2070 | return CallingConv::ARM_APCS; | ||||
2071 | else if (Subtarget->hasVFP2Base() && !Subtarget->isThumb1Only() && | ||||
2072 | getTargetMachine().Options.FloatABIType == FloatABI::Hard && | ||||
2073 | !isVarArg) | ||||
2074 | return CallingConv::ARM_AAPCS_VFP; | ||||
2075 | else | ||||
2076 | return CallingConv::ARM_AAPCS; | ||||
2077 | case CallingConv::Fast: | ||||
2078 | case CallingConv::CXX_FAST_TLS: | ||||
2079 | if (!Subtarget->isAAPCS_ABI()) { | ||||
2080 | if (Subtarget->hasVFP2Base() && !Subtarget->isThumb1Only() && !isVarArg) | ||||
2081 | return CallingConv::Fast; | ||||
2082 | return CallingConv::ARM_APCS; | ||||
2083 | } else if (Subtarget->hasVFP2Base() && | ||||
2084 | !Subtarget->isThumb1Only() && !isVarArg) | ||||
2085 | return CallingConv::ARM_AAPCS_VFP; | ||||
2086 | else | ||||
2087 | return CallingConv::ARM_AAPCS; | ||||
2088 | } | ||||
2089 | } | ||||
2090 | |||||
2091 | CCAssignFn *ARMTargetLowering::CCAssignFnForCall(CallingConv::ID CC, | ||||
2092 | bool isVarArg) const { | ||||
2093 | return CCAssignFnForNode(CC, false, isVarArg); | ||||
2094 | } | ||||
2095 | |||||
2096 | CCAssignFn *ARMTargetLowering::CCAssignFnForReturn(CallingConv::ID CC, | ||||
2097 | bool isVarArg) const { | ||||
2098 | return CCAssignFnForNode(CC, true, isVarArg); | ||||
2099 | } | ||||
2100 | |||||
2101 | /// CCAssignFnForNode - Selects the correct CCAssignFn for the given | ||||
2102 | /// CallingConvention. | ||||
2103 | CCAssignFn *ARMTargetLowering::CCAssignFnForNode(CallingConv::ID CC, | ||||
2104 | bool Return, | ||||
2105 | bool isVarArg) const { | ||||
2106 | switch (getEffectiveCallingConv(CC, isVarArg)) { | ||||
2107 | default: | ||||
2108 | report_fatal_error("Unsupported calling convention"); | ||||
2109 | case CallingConv::ARM_APCS: | ||||
2110 | return (Return ? RetCC_ARM_APCS : CC_ARM_APCS); | ||||
2111 | case CallingConv::ARM_AAPCS: | ||||
2112 | return (Return ? RetCC_ARM_AAPCS : CC_ARM_AAPCS); | ||||
2113 | case CallingConv::ARM_AAPCS_VFP: | ||||
2114 | return (Return ? RetCC_ARM_AAPCS_VFP : CC_ARM_AAPCS_VFP); | ||||
2115 | case CallingConv::Fast: | ||||
2116 | return (Return ? RetFastCC_ARM_APCS : FastCC_ARM_APCS); | ||||
2117 | case CallingConv::GHC: | ||||
2118 | return (Return ? RetCC_ARM_APCS : CC_ARM_APCS_GHC); | ||||
2119 | case CallingConv::PreserveMost: | ||||
2120 | return (Return ? RetCC_ARM_AAPCS : CC_ARM_AAPCS); | ||||
2121 | case CallingConv::CFGuard_Check: | ||||
2122 | return (Return ? RetCC_ARM_AAPCS : CC_ARM_Win32_CFGuard_Check); | ||||
2123 | } | ||||
2124 | } | ||||
2125 | |||||
2126 | SDValue ARMTargetLowering::MoveToHPR(const SDLoc &dl, SelectionDAG &DAG, | ||||
2127 | MVT LocVT, MVT ValVT, SDValue Val) const { | ||||
2128 | Val = DAG.getNode(ISD::BITCAST, dl, MVT::getIntegerVT(LocVT.getSizeInBits()), | ||||
2129 | Val); | ||||
2130 | if (Subtarget->hasFullFP16()) { | ||||
2131 | Val = DAG.getNode(ARMISD::VMOVhr, dl, ValVT, Val); | ||||
2132 | } else { | ||||
2133 | Val = DAG.getNode(ISD::TRUNCATE, dl, | ||||
2134 | MVT::getIntegerVT(ValVT.getSizeInBits()), Val); | ||||
2135 | Val = DAG.getNode(ISD::BITCAST, dl, ValVT, Val); | ||||
2136 | } | ||||
2137 | return Val; | ||||
2138 | } | ||||
2139 | |||||
2140 | SDValue ARMTargetLowering::MoveFromHPR(const SDLoc &dl, SelectionDAG &DAG, | ||||
2141 | MVT LocVT, MVT ValVT, | ||||
2142 | SDValue Val) const { | ||||
2143 | if (Subtarget->hasFullFP16()) { | ||||
2144 | Val = DAG.getNode(ARMISD::VMOVrh, dl, | ||||
2145 | MVT::getIntegerVT(LocVT.getSizeInBits()), Val); | ||||
2146 | } else { | ||||
2147 | Val = DAG.getNode(ISD::BITCAST, dl, | ||||
2148 | MVT::getIntegerVT(ValVT.getSizeInBits()), Val); | ||||
2149 | Val = DAG.getNode(ISD::ZERO_EXTEND, dl, | ||||
2150 | MVT::getIntegerVT(LocVT.getSizeInBits()), Val); | ||||
2151 | } | ||||
2152 | return DAG.getNode(ISD::BITCAST, dl, LocVT, Val); | ||||
2153 | } | ||||
2154 | |||||
2155 | /// LowerCallResult - Lower the result values of a call into the | ||||
2156 | /// appropriate copies out of appropriate physical registers. | ||||
2157 | SDValue ARMTargetLowering::LowerCallResult( | ||||
2158 | SDValue Chain, SDValue InFlag, CallingConv::ID CallConv, bool isVarArg, | ||||
2159 | const SmallVectorImpl<ISD::InputArg> &Ins, const SDLoc &dl, | ||||
2160 | SelectionDAG &DAG, SmallVectorImpl<SDValue> &InVals, bool isThisReturn, | ||||
2161 | SDValue ThisVal) const { | ||||
2162 | // Assign locations to each value returned by this call. | ||||
2163 | SmallVector<CCValAssign, 16> RVLocs; | ||||
2164 | CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(), RVLocs, | ||||
2165 | *DAG.getContext()); | ||||
2166 | CCInfo.AnalyzeCallResult(Ins, CCAssignFnForReturn(CallConv, isVarArg)); | ||||
2167 | |||||
2168 | // Copy all of the result registers out of their specified physreg. | ||||
2169 | for (unsigned i = 0; i != RVLocs.size(); ++i) { | ||||
2170 | CCValAssign VA = RVLocs[i]; | ||||
2171 | |||||
2172 | // Pass 'this' value directly from the argument to return value, to avoid | ||||
2173 | // reg unit interference | ||||
2174 | if (i == 0 && isThisReturn) { | ||||
2175 | assert(!VA.needsCustom() && VA.getLocVT() == MVT::i32 &&(static_cast <bool> (!VA.needsCustom() && VA.getLocVT () == MVT::i32 && "unexpected return calling convention register assignment" ) ? void (0) : __assert_fail ("!VA.needsCustom() && VA.getLocVT() == MVT::i32 && \"unexpected return calling convention register assignment\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 2176, __extension__ __PRETTY_FUNCTION__)) | ||||
2176 | "unexpected return calling convention register assignment")(static_cast <bool> (!VA.needsCustom() && VA.getLocVT () == MVT::i32 && "unexpected return calling convention register assignment" ) ? void (0) : __assert_fail ("!VA.needsCustom() && VA.getLocVT() == MVT::i32 && \"unexpected return calling convention register assignment\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 2176, __extension__ __PRETTY_FUNCTION__)); | ||||
2177 | InVals.push_back(ThisVal); | ||||
2178 | continue; | ||||
2179 | } | ||||
2180 | |||||
2181 | SDValue Val; | ||||
2182 | if (VA.needsCustom() && | ||||
2183 | (VA.getLocVT() == MVT::f64 || VA.getLocVT() == MVT::v2f64)) { | ||||
2184 | // Handle f64 or half of a v2f64. | ||||
2185 | SDValue Lo = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32, | ||||
2186 | InFlag); | ||||
2187 | Chain = Lo.getValue(1); | ||||
2188 | InFlag = Lo.getValue(2); | ||||
2189 | VA = RVLocs[++i]; // skip ahead to next loc | ||||
2190 | SDValue Hi = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32, | ||||
2191 | InFlag); | ||||
2192 | Chain = Hi.getValue(1); | ||||
2193 | InFlag = Hi.getValue(2); | ||||
2194 | if (!Subtarget->isLittle()) | ||||
2195 | std::swap (Lo, Hi); | ||||
2196 | Val = DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Lo, Hi); | ||||
2197 | |||||
2198 | if (VA.getLocVT() == MVT::v2f64) { | ||||
2199 | SDValue Vec = DAG.getNode(ISD::UNDEF, dl, MVT::v2f64); | ||||
2200 | Vec = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, Vec, Val, | ||||
2201 | DAG.getConstant(0, dl, MVT::i32)); | ||||
2202 | |||||
2203 | VA = RVLocs[++i]; // skip ahead to next loc | ||||
2204 | Lo = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32, InFlag); | ||||
2205 | Chain = Lo.getValue(1); | ||||
2206 | InFlag = Lo.getValue(2); | ||||
2207 | VA = RVLocs[++i]; // skip ahead to next loc | ||||
2208 | Hi = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32, InFlag); | ||||
2209 | Chain = Hi.getValue(1); | ||||
2210 | InFlag = Hi.getValue(2); | ||||
2211 | if (!Subtarget->isLittle()) | ||||
2212 | std::swap (Lo, Hi); | ||||
2213 | Val = DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Lo, Hi); | ||||
2214 | Val = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, Vec, Val, | ||||
2215 | DAG.getConstant(1, dl, MVT::i32)); | ||||
2216 | } | ||||
2217 | } else { | ||||
2218 | Val = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), VA.getLocVT(), | ||||
2219 | InFlag); | ||||
2220 | Chain = Val.getValue(1); | ||||
2221 | InFlag = Val.getValue(2); | ||||
2222 | } | ||||
2223 | |||||
2224 | switch (VA.getLocInfo()) { | ||||
2225 | default: llvm_unreachable("Unknown loc info!")::llvm::llvm_unreachable_internal("Unknown loc info!", "llvm/lib/Target/ARM/ARMISelLowering.cpp" , 2225); | ||||
2226 | case CCValAssign::Full: break; | ||||
2227 | case CCValAssign::BCvt: | ||||
2228 | Val = DAG.getNode(ISD::BITCAST, dl, VA.getValVT(), Val); | ||||
2229 | break; | ||||
2230 | } | ||||
2231 | |||||
2232 | // f16 arguments have their size extended to 4 bytes and passed as if they | ||||
2233 | // had been copied to the LSBs of a 32-bit register. | ||||
2234 | // For that, it's passed extended to i32 (soft ABI) or to f32 (hard ABI) | ||||
2235 | if (VA.needsCustom() && | ||||
2236 | (VA.getValVT() == MVT::f16 || VA.getValVT() == MVT::bf16)) | ||||
2237 | Val = MoveToHPR(dl, DAG, VA.getLocVT(), VA.getValVT(), Val); | ||||
2238 | |||||
2239 | InVals.push_back(Val); | ||||
2240 | } | ||||
2241 | |||||
2242 | return Chain; | ||||
2243 | } | ||||
2244 | |||||
2245 | std::pair<SDValue, MachinePointerInfo> ARMTargetLowering::computeAddrForCallArg( | ||||
2246 | const SDLoc &dl, SelectionDAG &DAG, const CCValAssign &VA, SDValue StackPtr, | ||||
2247 | bool IsTailCall, int SPDiff) const { | ||||
2248 | SDValue DstAddr; | ||||
2249 | MachinePointerInfo DstInfo; | ||||
2250 | int32_t Offset = VA.getLocMemOffset(); | ||||
2251 | MachineFunction &MF = DAG.getMachineFunction(); | ||||
2252 | |||||
2253 | if (IsTailCall) { | ||||
2254 | Offset += SPDiff; | ||||
2255 | auto PtrVT = getPointerTy(DAG.getDataLayout()); | ||||
2256 | int Size = VA.getLocVT().getFixedSizeInBits() / 8; | ||||
2257 | int FI = MF.getFrameInfo().CreateFixedObject(Size, Offset, true); | ||||
2258 | DstAddr = DAG.getFrameIndex(FI, PtrVT); | ||||
2259 | DstInfo = | ||||
2260 | MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), FI); | ||||
2261 | } else { | ||||
2262 | SDValue PtrOff = DAG.getIntPtrConstant(Offset, dl); | ||||
2263 | DstAddr = DAG.getNode(ISD::ADD, dl, getPointerTy(DAG.getDataLayout()), | ||||
2264 | StackPtr, PtrOff); | ||||
2265 | DstInfo = | ||||
2266 | MachinePointerInfo::getStack(DAG.getMachineFunction(), Offset); | ||||
2267 | } | ||||
2268 | |||||
2269 | return std::make_pair(DstAddr, DstInfo); | ||||
2270 | } | ||||
2271 | |||||
2272 | void ARMTargetLowering::PassF64ArgInRegs(const SDLoc &dl, SelectionDAG &DAG, | ||||
2273 | SDValue Chain, SDValue &Arg, | ||||
2274 | RegsToPassVector &RegsToPass, | ||||
2275 | CCValAssign &VA, CCValAssign &NextVA, | ||||
2276 | SDValue &StackPtr, | ||||
2277 | SmallVectorImpl<SDValue> &MemOpChains, | ||||
2278 | bool IsTailCall, | ||||
2279 | int SPDiff) const { | ||||
2280 | SDValue fmrrd = DAG.getNode(ARMISD::VMOVRRD, dl, | ||||
2281 | DAG.getVTList(MVT::i32, MVT::i32), Arg); | ||||
2282 | unsigned id = Subtarget->isLittle() ? 0 : 1; | ||||
2283 | RegsToPass.push_back(std::make_pair(VA.getLocReg(), fmrrd.getValue(id))); | ||||
2284 | |||||
2285 | if (NextVA.isRegLoc()) | ||||
2286 | RegsToPass.push_back(std::make_pair(NextVA.getLocReg(), fmrrd.getValue(1-id))); | ||||
2287 | else { | ||||
2288 | assert(NextVA.isMemLoc())(static_cast <bool> (NextVA.isMemLoc()) ? void (0) : __assert_fail ("NextVA.isMemLoc()", "llvm/lib/Target/ARM/ARMISelLowering.cpp" , 2288, __extension__ __PRETTY_FUNCTION__)); | ||||
2289 | if (!StackPtr.getNode()) | ||||
2290 | StackPtr = DAG.getCopyFromReg(Chain, dl, ARM::SP, | ||||
2291 | getPointerTy(DAG.getDataLayout())); | ||||
2292 | |||||
2293 | SDValue DstAddr; | ||||
2294 | MachinePointerInfo DstInfo; | ||||
2295 | std::tie(DstAddr, DstInfo) = | ||||
2296 | computeAddrForCallArg(dl, DAG, NextVA, StackPtr, IsTailCall, SPDiff); | ||||
2297 | MemOpChains.push_back( | ||||
2298 | DAG.getStore(Chain, dl, fmrrd.getValue(1 - id), DstAddr, DstInfo)); | ||||
2299 | } | ||||
2300 | } | ||||
2301 | |||||
2302 | static bool canGuaranteeTCO(CallingConv::ID CC, bool GuaranteeTailCalls) { | ||||
2303 | return (CC == CallingConv::Fast && GuaranteeTailCalls) || | ||||
2304 | CC == CallingConv::Tail || CC == CallingConv::SwiftTail; | ||||
2305 | } | ||||
2306 | |||||
2307 | /// LowerCall - Lowering a call into a callseq_start <- | ||||
2308 | /// ARMISD:CALL <- callseq_end chain. Also add input and output parameter | ||||
2309 | /// nodes. | ||||
2310 | SDValue | ||||
2311 | ARMTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI, | ||||
2312 | SmallVectorImpl<SDValue> &InVals) const { | ||||
2313 | SelectionDAG &DAG = CLI.DAG; | ||||
2314 | SDLoc &dl = CLI.DL; | ||||
2315 | SmallVectorImpl<ISD::OutputArg> &Outs = CLI.Outs; | ||||
2316 | SmallVectorImpl<SDValue> &OutVals = CLI.OutVals; | ||||
2317 | SmallVectorImpl<ISD::InputArg> &Ins = CLI.Ins; | ||||
2318 | SDValue Chain = CLI.Chain; | ||||
2319 | SDValue Callee = CLI.Callee; | ||||
2320 | bool &isTailCall = CLI.IsTailCall; | ||||
2321 | CallingConv::ID CallConv = CLI.CallConv; | ||||
2322 | bool doesNotRet = CLI.DoesNotReturn; | ||||
2323 | bool isVarArg = CLI.IsVarArg; | ||||
2324 | |||||
2325 | MachineFunction &MF = DAG.getMachineFunction(); | ||||
2326 | ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>(); | ||||
2327 | MachineFunction::CallSiteInfo CSInfo; | ||||
2328 | bool isStructRet = (Outs.empty()) ? false : Outs[0].Flags.isSRet(); | ||||
| |||||
2329 | bool isThisReturn = false; | ||||
2330 | bool isCmseNSCall = false; | ||||
2331 | bool isSibCall = false; | ||||
2332 | bool PreferIndirect = false; | ||||
2333 | bool GuardWithBTI = false; | ||||
2334 | |||||
2335 | // Lower 'returns_twice' calls to a pseudo-instruction. | ||||
2336 | if (CLI.CB && CLI.CB->getAttributes().hasFnAttr(Attribute::ReturnsTwice) && | ||||
2337 | !Subtarget->noBTIAtReturnTwice()) | ||||
2338 | GuardWithBTI = AFI->branchTargetEnforcement(); | ||||
2339 | |||||
2340 | // Determine whether this is a non-secure function call. | ||||
2341 | if (CLI.CB
| ||||
2342 | isCmseNSCall = true; | ||||
2343 | |||||
2344 | // Disable tail calls if they're not supported. | ||||
2345 | if (!Subtarget->supportsTailCall()) | ||||
2346 | isTailCall = false; | ||||
2347 | |||||
2348 | // For both the non-secure calls and the returns from a CMSE entry function, | ||||
2349 | // the function needs to do some extra work afte r the call, or before the | ||||
2350 | // return, respectively, thus it cannot end with atail call | ||||
2351 | if (isCmseNSCall
| ||||
2352 | isTailCall = false; | ||||
2353 | |||||
2354 | if (isa<GlobalAddressSDNode>(Callee)) { | ||||
2355 | // If we're optimizing for minimum size and the function is called three or | ||||
2356 | // more times in this block, we can improve codesize by calling indirectly | ||||
2357 | // as BLXr has a 16-bit encoding. | ||||
2358 | auto *GV = cast<GlobalAddressSDNode>(Callee)->getGlobal(); | ||||
2359 | if (CLI.CB) { | ||||
2360 | auto *BB = CLI.CB->getParent(); | ||||
2361 | PreferIndirect = Subtarget->isThumb() && Subtarget->hasMinSize() && | ||||
2362 | count_if(GV->users(), [&BB](const User *U) { | ||||
2363 | return isa<Instruction>(U) && | ||||
2364 | cast<Instruction>(U)->getParent() == BB; | ||||
2365 | }) > 2; | ||||
2366 | } | ||||
2367 | } | ||||
2368 | if (isTailCall) { | ||||
2369 | // Check if it's really possible to do a tail call. | ||||
2370 | isTailCall = IsEligibleForTailCallOptimization( | ||||
2371 | Callee, CallConv, isVarArg, isStructRet, | ||||
2372 | MF.getFunction().hasStructRetAttr(), Outs, OutVals, Ins, DAG, | ||||
2373 | PreferIndirect); | ||||
2374 | |||||
2375 | if (isTailCall && !getTargetMachine().Options.GuaranteedTailCallOpt && | ||||
2376 | CallConv != CallingConv::Tail && CallConv != CallingConv::SwiftTail) | ||||
2377 | isSibCall = true; | ||||
2378 | |||||
2379 | // We don't support GuaranteedTailCallOpt for ARM, only automatically | ||||
2380 | // detected sibcalls. | ||||
2381 | if (isTailCall) | ||||
2382 | ++NumTailCalls; | ||||
2383 | } | ||||
2384 | |||||
2385 | if (!isTailCall
| ||||
2386 | report_fatal_error("failed to perform tail call elimination on a call " | ||||
2387 | "site marked musttail"); | ||||
2388 | // Analyze operands of the call, assigning locations to each operand. | ||||
2389 | SmallVector<CCValAssign, 16> ArgLocs; | ||||
2390 | CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(), ArgLocs, | ||||
2391 | *DAG.getContext()); | ||||
2392 | CCInfo.AnalyzeCallOperands(Outs, CCAssignFnForCall(CallConv, isVarArg)); | ||||
2393 | |||||
2394 | // Get a count of how many bytes are to be pushed on the stack. | ||||
2395 | unsigned NumBytes = CCInfo.getNextStackOffset(); | ||||
2396 | |||||
2397 | // SPDiff is the byte offset of the call's argument area from the callee's. | ||||
2398 | // Stores to callee stack arguments will be placed in FixedStackSlots offset | ||||
2399 | // by this amount for a tail call. In a sibling call it must be 0 because the | ||||
2400 | // caller will deallocate the entire stack and the callee still expects its | ||||
2401 | // arguments to begin at SP+0. Completely unused for non-tail calls. | ||||
2402 | int SPDiff = 0; | ||||
2403 | |||||
2404 | if (isTailCall && !isSibCall) { | ||||
2405 | auto FuncInfo = MF.getInfo<ARMFunctionInfo>(); | ||||
2406 | unsigned NumReusableBytes = FuncInfo->getArgumentStackSize(); | ||||
2407 | |||||
2408 | // Since callee will pop argument stack as a tail call, we must keep the | ||||
2409 | // popped size 16-byte aligned. | ||||
2410 | Align StackAlign = DAG.getDataLayout().getStackAlignment(); | ||||
2411 | NumBytes = alignTo(NumBytes, StackAlign); | ||||
2412 | |||||
2413 | // SPDiff will be negative if this tail call requires more space than we | ||||
2414 | // would automatically have in our incoming argument space. Positive if we | ||||
2415 | // can actually shrink the stack. | ||||
2416 | SPDiff = NumReusableBytes - NumBytes; | ||||
2417 | |||||
2418 | // If this call requires more stack than we have available from | ||||
2419 | // LowerFormalArguments, tell FrameLowering to reserve space for it. | ||||
2420 | if (SPDiff < 0 && AFI->getArgRegsSaveSize() < (unsigned)-SPDiff) | ||||
2421 | AFI->setArgRegsSaveSize(-SPDiff); | ||||
2422 | } | ||||
2423 | |||||
2424 | if (isSibCall
| ||||
2425 | // For sibling tail calls, memory operands are available in our caller's stack. | ||||
2426 | NumBytes = 0; | ||||
2427 | } else { | ||||
2428 | // Adjust the stack pointer for the new arguments... | ||||
2429 | // These operations are automatically eliminated by the prolog/epilog pass | ||||
2430 | Chain = DAG.getCALLSEQ_START(Chain, isTailCall
| ||||
2431 | } | ||||
2432 | |||||
2433 | SDValue StackPtr = | ||||
2434 | DAG.getCopyFromReg(Chain, dl, ARM::SP, getPointerTy(DAG.getDataLayout())); | ||||
2435 | |||||
2436 | RegsToPassVector RegsToPass; | ||||
2437 | SmallVector<SDValue, 8> MemOpChains; | ||||
2438 | |||||
2439 | // During a tail call, stores to the argument area must happen after all of | ||||
2440 | // the function's incoming arguments have been loaded because they may alias. | ||||
2441 | // This is done by folding in a TokenFactor from LowerFormalArguments, but | ||||
2442 | // there's no point in doing so repeatedly so this tracks whether that's | ||||
2443 | // happened yet. | ||||
2444 | bool AfterFormalArgLoads = false; | ||||
2445 | |||||
2446 | // Walk the register/memloc assignments, inserting copies/loads. In the case | ||||
2447 | // of tail call optimization, arguments are handled later. | ||||
2448 | for (unsigned i = 0, realArgIdx = 0, e = ArgLocs.size(); | ||||
2449 | i != e; | ||||
2450 | ++i, ++realArgIdx) { | ||||
2451 | CCValAssign &VA = ArgLocs[i]; | ||||
2452 | SDValue Arg = OutVals[realArgIdx]; | ||||
2453 | ISD::ArgFlagsTy Flags = Outs[realArgIdx].Flags; | ||||
2454 | bool isByVal = Flags.isByVal(); | ||||
2455 | |||||
2456 | // Promote the value if needed. | ||||
2457 | switch (VA.getLocInfo()) { | ||||
2458 | default: llvm_unreachable("Unknown loc info!")::llvm::llvm_unreachable_internal("Unknown loc info!", "llvm/lib/Target/ARM/ARMISelLowering.cpp" , 2458); | ||||
2459 | case CCValAssign::Full: break; | ||||
2460 | case CCValAssign::SExt: | ||||
2461 | Arg = DAG.getNode(ISD::SIGN_EXTEND, dl, VA.getLocVT(), Arg); | ||||
2462 | break; | ||||
2463 | case CCValAssign::ZExt: | ||||
2464 | Arg = DAG.getNode(ISD::ZERO_EXTEND, dl, VA.getLocVT(), Arg); | ||||
2465 | break; | ||||
2466 | case CCValAssign::AExt: | ||||
2467 | Arg = DAG.getNode(ISD::ANY_EXTEND, dl, VA.getLocVT(), Arg); | ||||
2468 | break; | ||||
2469 | case CCValAssign::BCvt: | ||||
2470 | Arg = DAG.getNode(ISD::BITCAST, dl, VA.getLocVT(), Arg); | ||||
2471 | break; | ||||
2472 | } | ||||
2473 | |||||
2474 | if (isTailCall && VA.isMemLoc() && !AfterFormalArgLoads) { | ||||
2475 | Chain = DAG.getStackArgumentTokenFactor(Chain); | ||||
2476 | AfterFormalArgLoads = true; | ||||
2477 | } | ||||
2478 | |||||
2479 | // f16 arguments have their size extended to 4 bytes and passed as if they | ||||
2480 | // had been copied to the LSBs of a 32-bit register. | ||||
2481 | // For that, it's passed extended to i32 (soft ABI) or to f32 (hard ABI) | ||||
2482 | if (VA.needsCustom() && | ||||
2483 | (VA.getValVT() == MVT::f16 || VA.getValVT() == MVT::bf16)) { | ||||
2484 | Arg = MoveFromHPR(dl, DAG, VA.getLocVT(), VA.getValVT(), Arg); | ||||
2485 | } else { | ||||
2486 | // f16 arguments could have been extended prior to argument lowering. | ||||
2487 | // Mask them arguments if this is a CMSE nonsecure call. | ||||
2488 | auto ArgVT = Outs[realArgIdx].ArgVT; | ||||
2489 | if (isCmseNSCall && (ArgVT == MVT::f16)) { | ||||
2490 | auto LocBits = VA.getLocVT().getSizeInBits(); | ||||
2491 | auto MaskValue = APInt::getLowBitsSet(LocBits, ArgVT.getSizeInBits()); | ||||
2492 | SDValue Mask = | ||||
2493 | DAG.getConstant(MaskValue, dl, MVT::getIntegerVT(LocBits)); | ||||
2494 | Arg = DAG.getNode(ISD::BITCAST, dl, MVT::getIntegerVT(LocBits), Arg); | ||||
2495 | Arg = DAG.getNode(ISD::AND, dl, MVT::getIntegerVT(LocBits), Arg, Mask); | ||||
2496 | Arg = DAG.getNode(ISD::BITCAST, dl, VA.getLocVT(), Arg); | ||||
2497 | } | ||||
2498 | } | ||||
2499 | |||||
2500 | // f64 and v2f64 might be passed in i32 pairs and must be split into pieces | ||||
2501 | if (VA.needsCustom() && VA.getLocVT() == MVT::v2f64) { | ||||
2502 | SDValue Op0 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Arg, | ||||
2503 | DAG.getConstant(0, dl, MVT::i32)); | ||||
2504 | SDValue Op1 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Arg, | ||||
2505 | DAG.getConstant(1, dl, MVT::i32)); | ||||
2506 | |||||
2507 | PassF64ArgInRegs(dl, DAG, Chain, Op0, RegsToPass, VA, ArgLocs[++i], | ||||
2508 | StackPtr, MemOpChains, isTailCall, SPDiff); | ||||
2509 | |||||
2510 | VA = ArgLocs[++i]; // skip ahead to next loc | ||||
2511 | if (VA.isRegLoc()) { | ||||
2512 | PassF64ArgInRegs(dl, DAG, Chain, Op1, RegsToPass, VA, ArgLocs[++i], | ||||
2513 | StackPtr, MemOpChains, isTailCall, SPDiff); | ||||
2514 | } else { | ||||
2515 | assert(VA.isMemLoc())(static_cast <bool> (VA.isMemLoc()) ? void (0) : __assert_fail ("VA.isMemLoc()", "llvm/lib/Target/ARM/ARMISelLowering.cpp", 2515, __extension__ __PRETTY_FUNCTION__)); | ||||
2516 | SDValue DstAddr; | ||||
2517 | MachinePointerInfo DstInfo; | ||||
2518 | std::tie(DstAddr, DstInfo) = | ||||
2519 | computeAddrForCallArg(dl, DAG, VA, StackPtr, isTailCall, SPDiff); | ||||
2520 | MemOpChains.push_back(DAG.getStore(Chain, dl, Op1, DstAddr, DstInfo)); | ||||
2521 | } | ||||
2522 | } else if (VA.needsCustom() && VA.getLocVT() == MVT::f64) { | ||||
2523 | PassF64ArgInRegs(dl, DAG, Chain, Arg, RegsToPass, VA, ArgLocs[++i], | ||||
2524 | StackPtr, MemOpChains, isTailCall, SPDiff); | ||||
2525 | } else if (VA.isRegLoc()) { | ||||
2526 | if (realArgIdx == 0 && Flags.isReturned() && !Flags.isSwiftSelf() && | ||||
2527 | Outs[0].VT == MVT::i32) { | ||||
2528 | assert(VA.getLocVT() == MVT::i32 &&(static_cast <bool> (VA.getLocVT() == MVT::i32 && "unexpected calling convention register assignment") ? void ( 0) : __assert_fail ("VA.getLocVT() == MVT::i32 && \"unexpected calling convention register assignment\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 2529, __extension__ __PRETTY_FUNCTION__)) | ||||
2529 | "unexpected calling convention register assignment")(static_cast <bool> (VA.getLocVT() == MVT::i32 && "unexpected calling convention register assignment") ? void ( 0) : __assert_fail ("VA.getLocVT() == MVT::i32 && \"unexpected calling convention register assignment\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 2529, __extension__ __PRETTY_FUNCTION__)); | ||||
2530 | assert(!Ins.empty() && Ins[0].VT == MVT::i32 &&(static_cast <bool> (!Ins.empty() && Ins[0].VT == MVT::i32 && "unexpected use of 'returned'") ? void ( 0) : __assert_fail ("!Ins.empty() && Ins[0].VT == MVT::i32 && \"unexpected use of 'returned'\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 2531, __extension__ __PRETTY_FUNCTION__)) | ||||
2531 | "unexpected use of 'returned'")(static_cast <bool> (!Ins.empty() && Ins[0].VT == MVT::i32 && "unexpected use of 'returned'") ? void ( 0) : __assert_fail ("!Ins.empty() && Ins[0].VT == MVT::i32 && \"unexpected use of 'returned'\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 2531, __extension__ __PRETTY_FUNCTION__)); | ||||
2532 | isThisReturn = true; | ||||
2533 | } | ||||
2534 | const TargetOptions &Options = DAG.getTarget().Options; | ||||
2535 | if (Options.EmitCallSiteInfo) | ||||
2536 | CSInfo.emplace_back(VA.getLocReg(), i); | ||||
2537 | RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg)); | ||||
2538 | } else if (isByVal) { | ||||
2539 | assert(VA.isMemLoc())(static_cast <bool> (VA.isMemLoc()) ? void (0) : __assert_fail ("VA.isMemLoc()", "llvm/lib/Target/ARM/ARMISelLowering.cpp", 2539, __extension__ __PRETTY_FUNCTION__)); | ||||
2540 | unsigned offset = 0; | ||||
2541 | |||||
2542 | // True if this byval aggregate will be split between registers | ||||
2543 | // and memory. | ||||
2544 | unsigned ByValArgsCount = CCInfo.getInRegsParamsCount(); | ||||
2545 | unsigned CurByValIdx = CCInfo.getInRegsParamsProcessed(); | ||||
2546 | |||||
2547 | if (CurByValIdx < ByValArgsCount) { | ||||
2548 | |||||
2549 | unsigned RegBegin, RegEnd; | ||||
2550 | CCInfo.getInRegsParamInfo(CurByValIdx, RegBegin, RegEnd); | ||||
2551 | |||||
2552 | EVT PtrVT = | ||||
2553 | DAG.getTargetLoweringInfo().getPointerTy(DAG.getDataLayout()); | ||||
2554 | unsigned int i, j; | ||||
2555 | for (i = 0, j = RegBegin; j < RegEnd; i++, j++) { | ||||
2556 | SDValue Const = DAG.getConstant(4*i, dl, MVT::i32); | ||||
2557 | SDValue AddArg = DAG.getNode(ISD::ADD, dl, PtrVT, Arg, Const); | ||||
2558 | SDValue Load = | ||||
2559 | DAG.getLoad(PtrVT, dl, Chain, AddArg, MachinePointerInfo(), | ||||
2560 | DAG.InferPtrAlign(AddArg)); | ||||
2561 | MemOpChains.push_back(Load.getValue(1)); | ||||
2562 | RegsToPass.push_back(std::make_pair(j, Load)); | ||||
2563 | } | ||||
2564 | |||||
2565 | // If parameter size outsides register area, "offset" value | ||||
2566 | // helps us to calculate stack slot for remained part properly. | ||||
2567 | offset = RegEnd - RegBegin; | ||||
2568 | |||||
2569 | CCInfo.nextInRegsParam(); | ||||
2570 | } | ||||
2571 | |||||
2572 | if (Flags.getByValSize() > 4*offset) { | ||||
2573 | auto PtrVT = getPointerTy(DAG.getDataLayout()); | ||||
2574 | SDValue Dst; | ||||
2575 | MachinePointerInfo DstInfo; | ||||
2576 | std::tie(Dst, DstInfo) = | ||||
2577 | computeAddrForCallArg(dl, DAG, VA, StackPtr, isTailCall, SPDiff); | ||||
2578 | SDValue SrcOffset = DAG.getIntPtrConstant(4*offset, dl); | ||||
2579 | SDValue Src = DAG.getNode(ISD::ADD, dl, PtrVT, Arg, SrcOffset); | ||||
2580 | SDValue SizeNode = DAG.getConstant(Flags.getByValSize() - 4*offset, dl, | ||||
2581 | MVT::i32); | ||||
2582 | SDValue AlignNode = | ||||
2583 | DAG.getConstant(Flags.getNonZeroByValAlign().value(), dl, MVT::i32); | ||||
2584 | |||||
2585 | SDVTList VTs = DAG.getVTList(MVT::Other, MVT::Glue); | ||||
2586 | SDValue Ops[] = { Chain, Dst, Src, SizeNode, AlignNode}; | ||||
2587 | MemOpChains.push_back(DAG.getNode(ARMISD::COPY_STRUCT_BYVAL, dl, VTs, | ||||
2588 | Ops)); | ||||
2589 | } | ||||
2590 | } else { | ||||
2591 | assert(VA.isMemLoc())(static_cast <bool> (VA.isMemLoc()) ? void (0) : __assert_fail ("VA.isMemLoc()", "llvm/lib/Target/ARM/ARMISelLowering.cpp", 2591, __extension__ __PRETTY_FUNCTION__)); | ||||
2592 | SDValue DstAddr; | ||||
2593 | MachinePointerInfo DstInfo; | ||||
2594 | std::tie(DstAddr, DstInfo) = | ||||
2595 | computeAddrForCallArg(dl, DAG, VA, StackPtr, isTailCall, SPDiff); | ||||
2596 | |||||
2597 | SDValue Store = DAG.getStore(Chain, dl, Arg, DstAddr, DstInfo); | ||||
2598 | MemOpChains.push_back(Store); | ||||
2599 | } | ||||
2600 | } | ||||
2601 | |||||
2602 | if (!MemOpChains.empty()) | ||||
2603 | Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOpChains); | ||||
2604 | |||||
2605 | // Build a sequence of copy-to-reg nodes chained together with token chain | ||||
2606 | // and flag operands which copy the outgoing args into the appropriate regs. | ||||
2607 | SDValue InFlag; | ||||
2608 | for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) { | ||||
2609 | Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first, | ||||
2610 | RegsToPass[i].second, InFlag); | ||||
2611 | InFlag = Chain.getValue(1); | ||||
2612 | } | ||||
2613 | |||||
2614 | // If the callee is a GlobalAddress/ExternalSymbol node (quite common, every | ||||
2615 | // direct call is) turn it into a TargetGlobalAddress/TargetExternalSymbol | ||||
2616 | // node so that legalize doesn't hack it. | ||||
2617 | bool isDirect = false; | ||||
2618 | |||||
2619 | const TargetMachine &TM = getTargetMachine(); | ||||
2620 | const Module *Mod = MF.getFunction().getParent(); | ||||
2621 | const GlobalValue *GV = nullptr; | ||||
2622 | if (GlobalAddressSDNode *G
| ||||
2623 | GV = G->getGlobal(); | ||||
2624 | bool isStub = | ||||
2625 | !TM.shouldAssumeDSOLocal(*Mod, GV) && Subtarget->isTargetMachO(); | ||||
2626 | |||||
2627 | bool isARMFunc = !Subtarget->isThumb() || (isStub && !Subtarget->isMClass()); | ||||
2628 | bool isLocalARMFunc = false; | ||||
2629 | auto PtrVt = getPointerTy(DAG.getDataLayout()); | ||||
2630 | |||||
2631 | if (Subtarget->genLongCalls()) { | ||||
2632 | assert((!isPositionIndependent() || Subtarget->isTargetWindows()) &&(static_cast <bool> ((!isPositionIndependent() || Subtarget ->isTargetWindows()) && "long-calls codegen is not position independent!" ) ? void (0) : __assert_fail ("(!isPositionIndependent() || Subtarget->isTargetWindows()) && \"long-calls codegen is not position independent!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 2633, __extension__ __PRETTY_FUNCTION__)) | ||||
2633 | "long-calls codegen is not position independent!")(static_cast <bool> ((!isPositionIndependent() || Subtarget ->isTargetWindows()) && "long-calls codegen is not position independent!" ) ? void (0) : __assert_fail ("(!isPositionIndependent() || Subtarget->isTargetWindows()) && \"long-calls codegen is not position independent!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 2633, __extension__ __PRETTY_FUNCTION__)); | ||||
2634 | // Handle a global address or an external symbol. If it's not one of | ||||
2635 | // those, the target's already in a register, so we don't need to do | ||||
2636 | // anything extra. | ||||
2637 | if (isa<GlobalAddressSDNode>(Callee)) { | ||||
2638 | // Create a constant pool entry for the callee address | ||||
2639 | unsigned ARMPCLabelIndex = AFI->createPICLabelUId(); | ||||
2640 | ARMConstantPoolValue *CPV = | ||||
2641 | ARMConstantPoolConstant::Create(GV, ARMPCLabelIndex, ARMCP::CPValue, 0); | ||||
2642 | |||||
2643 | // Get the address of the callee into a register | ||||
2644 | SDValue CPAddr = DAG.getTargetConstantPool(CPV, PtrVt, Align(4)); | ||||
2645 | CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr); | ||||
2646 | Callee = DAG.getLoad( | ||||
2647 | PtrVt, dl, DAG.getEntryNode(), CPAddr, | ||||
2648 | MachinePointerInfo::getConstantPool(DAG.getMachineFunction())); | ||||
2649 | } else if (ExternalSymbolSDNode *S=dyn_cast<ExternalSymbolSDNode>(Callee)) { | ||||
2650 | const char *Sym = S->getSymbol(); | ||||
2651 | |||||
2652 | // Create a constant pool entry for the callee address | ||||
2653 | unsigned ARMPCLabelIndex = AFI->createPICLabelUId(); | ||||
2654 | ARMConstantPoolValue *CPV = | ||||
2655 | ARMConstantPoolSymbol::Create(*DAG.getContext(), Sym, | ||||
2656 | ARMPCLabelIndex, 0); | ||||
2657 | // Get the address of the callee into a register | ||||
2658 | SDValue CPAddr = DAG.getTargetConstantPool(CPV, PtrVt, Align(4)); | ||||
2659 | CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr); | ||||
2660 | Callee = DAG.getLoad( | ||||
2661 | PtrVt, dl, DAG.getEntryNode(), CPAddr, | ||||
2662 | MachinePointerInfo::getConstantPool(DAG.getMachineFunction())); | ||||
2663 | } | ||||
2664 | } else if (isa<GlobalAddressSDNode>(Callee)) { | ||||
2665 | if (!PreferIndirect
| ||||
2666 | isDirect = true; | ||||
2667 | bool isDef = GV->isStrongDefinitionForLinker(); | ||||
| |||||
2668 | |||||
2669 | // ARM call to a local ARM function is predicable. | ||||
2670 | isLocalARMFunc = !Subtarget->isThumb() && (isDef || !ARMInterworking); | ||||
2671 | // tBX takes a register source operand. | ||||
2672 | if (isStub && Subtarget->isThumb1Only() && !Subtarget->hasV5TOps()) { | ||||
2673 | assert(Subtarget->isTargetMachO() && "WrapperPIC use on non-MachO?")(static_cast <bool> (Subtarget->isTargetMachO() && "WrapperPIC use on non-MachO?") ? void (0) : __assert_fail ( "Subtarget->isTargetMachO() && \"WrapperPIC use on non-MachO?\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 2673, __extension__ __PRETTY_FUNCTION__)); | ||||
2674 | Callee = DAG.getNode( | ||||
2675 | ARMISD::WrapperPIC, dl, PtrVt, | ||||
2676 | DAG.getTargetGlobalAddress(GV, dl, PtrVt, 0, ARMII::MO_NONLAZY)); | ||||
2677 | Callee = DAG.getLoad( | ||||
2678 | PtrVt, dl, DAG.getEntryNode(), Callee, | ||||
2679 | MachinePointerInfo::getGOT(DAG.getMachineFunction()), MaybeAlign(), | ||||
2680 | MachineMemOperand::MODereferenceable | | ||||
2681 | MachineMemOperand::MOInvariant); | ||||
2682 | } else if (Subtarget->isTargetCOFF()) { | ||||
2683 | assert(Subtarget->isTargetWindows() &&(static_cast <bool> (Subtarget->isTargetWindows() && "Windows is the only supported COFF target") ? void (0) : __assert_fail ("Subtarget->isTargetWindows() && \"Windows is the only supported COFF target\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 2684, __extension__ __PRETTY_FUNCTION__)) | ||||
2684 | "Windows is the only supported COFF target")(static_cast <bool> (Subtarget->isTargetWindows() && "Windows is the only supported COFF target") ? void (0) : __assert_fail ("Subtarget->isTargetWindows() && \"Windows is the only supported COFF target\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 2684, __extension__ __PRETTY_FUNCTION__)); | ||||
2685 | unsigned TargetFlags = ARMII::MO_NO_FLAG; | ||||
2686 | if (GV->hasDLLImportStorageClass()) | ||||
2687 | TargetFlags = ARMII::MO_DLLIMPORT; | ||||
2688 | else if (!TM.shouldAssumeDSOLocal(*GV->getParent(), GV)) | ||||
2689 | TargetFlags = ARMII::MO_COFFSTUB; | ||||
2690 | Callee = DAG.getTargetGlobalAddress(GV, dl, PtrVt, /*offset=*/0, | ||||
2691 | TargetFlags); | ||||
2692 | if (TargetFlags & (ARMII::MO_DLLIMPORT | ARMII::MO_COFFSTUB)) | ||||
2693 | Callee = | ||||
2694 | DAG.getLoad(PtrVt, dl, DAG.getEntryNode(), | ||||
2695 | DAG.getNode(ARMISD::Wrapper, dl, PtrVt, Callee), | ||||
2696 | MachinePointerInfo::getGOT(DAG.getMachineFunction())); | ||||
2697 | } else { | ||||
2698 | Callee = DAG.getTargetGlobalAddress(GV, dl, PtrVt, 0, 0); | ||||
2699 | } | ||||
2700 | } | ||||
2701 | } else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) { | ||||
2702 | isDirect = true; | ||||
2703 | // tBX takes a register source operand. | ||||
2704 | const char *Sym = S->getSymbol(); | ||||
2705 | if (isARMFunc && Subtarget->isThumb1Only() && !Subtarget->hasV5TOps()) { | ||||
2706 | unsigned ARMPCLabelIndex = AFI->createPICLabelUId(); | ||||
2707 | ARMConstantPoolValue *CPV = | ||||
2708 | ARMConstantPoolSymbol::Create(*DAG.getContext(), Sym, | ||||
2709 | ARMPCLabelIndex, 4); | ||||
2710 | SDValue CPAddr = DAG.getTargetConstantPool(CPV, PtrVt, Align(4)); | ||||
2711 | CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr); | ||||
2712 | Callee = DAG.getLoad( | ||||
2713 | PtrVt, dl, DAG.getEntryNode(), CPAddr, | ||||
2714 | MachinePointerInfo::getConstantPool(DAG.getMachineFunction())); | ||||
2715 | SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, dl, MVT::i32); | ||||
2716 | Callee = DAG.getNode(ARMISD::PIC_ADD, dl, PtrVt, Callee, PICLabel); | ||||
2717 | } else { | ||||
2718 | Callee = DAG.getTargetExternalSymbol(Sym, PtrVt, 0); | ||||
2719 | } | ||||
2720 | } | ||||
2721 | |||||
2722 | if (isCmseNSCall) { | ||||
2723 | assert(!isARMFunc && !isDirect &&(static_cast <bool> (!isARMFunc && !isDirect && "Cannot handle call to ARM function or direct call") ? void ( 0) : __assert_fail ("!isARMFunc && !isDirect && \"Cannot handle call to ARM function or direct call\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 2724, __extension__ __PRETTY_FUNCTION__)) | ||||
2724 | "Cannot handle call to ARM function or direct call")(static_cast <bool> (!isARMFunc && !isDirect && "Cannot handle call to ARM function or direct call") ? void ( 0) : __assert_fail ("!isARMFunc && !isDirect && \"Cannot handle call to ARM function or direct call\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 2724, __extension__ __PRETTY_FUNCTION__)); | ||||
2725 | if (NumBytes > 0) { | ||||
2726 | DiagnosticInfoUnsupported Diag(DAG.getMachineFunction().getFunction(), | ||||
2727 | "call to non-secure function would " | ||||
2728 | "require passing arguments on stack", | ||||
2729 | dl.getDebugLoc()); | ||||
2730 | DAG.getContext()->diagnose(Diag); | ||||
2731 | } | ||||
2732 | if (isStructRet) { | ||||
2733 | DiagnosticInfoUnsupported Diag( | ||||
2734 | DAG.getMachineFunction().getFunction(), | ||||
2735 | "call to non-secure function would return value through pointer", | ||||
2736 | dl.getDebugLoc()); | ||||
2737 | DAG.getContext()->diagnose(Diag); | ||||
2738 | } | ||||
2739 | } | ||||
2740 | |||||
2741 | // FIXME: handle tail calls differently. | ||||
2742 | unsigned CallOpc; | ||||
2743 | if (Subtarget->isThumb()) { | ||||
2744 | if (GuardWithBTI) | ||||
2745 | CallOpc = ARMISD::t2CALL_BTI; | ||||
2746 | else if (isCmseNSCall) | ||||
2747 | CallOpc = ARMISD::tSECALL; | ||||
2748 | else if ((!isDirect || isARMFunc) && !Subtarget->hasV5TOps()) | ||||
2749 | CallOpc = ARMISD::CALL_NOLINK; | ||||
2750 | else | ||||
2751 | CallOpc = ARMISD::CALL; | ||||
2752 | } else { | ||||
2753 | if (!isDirect && !Subtarget->hasV5TOps()) | ||||
2754 | CallOpc = ARMISD::CALL_NOLINK; | ||||
2755 | else if (doesNotRet && isDirect && Subtarget->hasRetAddrStack() && | ||||
2756 | // Emit regular call when code size is the priority | ||||
2757 | !Subtarget->hasMinSize()) | ||||
2758 | // "mov lr, pc; b _foo" to avoid confusing the RSP | ||||
2759 | CallOpc = ARMISD::CALL_NOLINK; | ||||
2760 | else | ||||
2761 | CallOpc = isLocalARMFunc ? ARMISD::CALL_PRED : ARMISD::CALL; | ||||
2762 | } | ||||
2763 | |||||
2764 | // We don't usually want to end the call-sequence here because we would tidy | ||||
2765 | // the frame up *after* the call, however in the ABI-changing tail-call case | ||||
2766 | // we've carefully laid out the parameters so that when sp is reset they'll be | ||||
2767 | // in the correct location. | ||||
2768 | if (isTailCall && !isSibCall) { | ||||
2769 | Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(0, dl, true), | ||||
2770 | DAG.getIntPtrConstant(0, dl, true), InFlag, dl); | ||||
2771 | InFlag = Chain.getValue(1); | ||||
2772 | } | ||||
2773 | |||||
2774 | std::vector<SDValue> Ops; | ||||
2775 | Ops.push_back(Chain); | ||||
2776 | Ops.push_back(Callee); | ||||
2777 | |||||
2778 | if (isTailCall) { | ||||
2779 | Ops.push_back(DAG.getTargetConstant(SPDiff, dl, MVT::i32)); | ||||
2780 | } | ||||
2781 | |||||
2782 | // Add argument registers to the end of the list so that they are known live | ||||
2783 | // into the call. | ||||
2784 | for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) | ||||
2785 | Ops.push_back(DAG.getRegister(RegsToPass[i].first, | ||||
2786 | RegsToPass[i].second.getValueType())); | ||||
2787 | |||||
2788 | // Add a register mask operand representing the call-preserved registers. | ||||
2789 | if (!isTailCall) { | ||||
2790 | const uint32_t *Mask; | ||||
2791 | const ARMBaseRegisterInfo *ARI = Subtarget->getRegisterInfo(); | ||||
2792 | if (isThisReturn) { | ||||
2793 | // For 'this' returns, use the R0-preserving mask if applicable | ||||
2794 | Mask = ARI->getThisReturnPreservedMask(MF, CallConv); | ||||
2795 | if (!Mask) { | ||||
2796 | // Set isThisReturn to false if the calling convention is not one that | ||||
2797 | // allows 'returned' to be modeled in this way, so LowerCallResult does | ||||
2798 | // not try to pass 'this' straight through | ||||
2799 | isThisReturn = false; | ||||
2800 | Mask = ARI->getCallPreservedMask(MF, CallConv); | ||||
2801 | } | ||||
2802 | } else | ||||
2803 | Mask = ARI->getCallPreservedMask(MF, CallConv); | ||||
2804 | |||||
2805 | 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\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 2805, __extension__ __PRETTY_FUNCTION__)); | ||||
2806 | Ops.push_back(DAG.getRegisterMask(Mask)); | ||||
2807 | } | ||||
2808 | |||||
2809 | if (InFlag.getNode()) | ||||
2810 | Ops.push_back(InFlag); | ||||
2811 | |||||
2812 | SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue); | ||||
2813 | if (isTailCall) { | ||||
2814 | MF.getFrameInfo().setHasTailCall(); | ||||
2815 | SDValue Ret = DAG.getNode(ARMISD::TC_RETURN, dl, NodeTys, Ops); | ||||
2816 | DAG.addCallSiteInfo(Ret.getNode(), std::move(CSInfo)); | ||||
2817 | return Ret; | ||||
2818 | } | ||||
2819 | |||||
2820 | // Returns a chain and a flag for retval copy to use. | ||||
2821 | Chain = DAG.getNode(CallOpc, dl, NodeTys, Ops); | ||||
2822 | DAG.addNoMergeSiteInfo(Chain.getNode(), CLI.NoMerge); | ||||
2823 | InFlag = Chain.getValue(1); | ||||
2824 | DAG.addCallSiteInfo(Chain.getNode(), std::move(CSInfo)); | ||||
2825 | |||||
2826 | // If we're guaranteeing tail-calls will be honoured, the callee must | ||||
2827 | // pop its own argument stack on return. But this call is *not* a tail call so | ||||
2828 | // we need to undo that after it returns to restore the status-quo. | ||||
2829 | bool TailCallOpt = getTargetMachine().Options.GuaranteedTailCallOpt; | ||||
2830 | uint64_t CalleePopBytes = | ||||
2831 | canGuaranteeTCO(CallConv, TailCallOpt) ? alignTo(NumBytes, 16) : -1ULL; | ||||
2832 | |||||
2833 | Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(NumBytes, dl, true), | ||||
2834 | DAG.getIntPtrConstant(CalleePopBytes, dl, true), | ||||
2835 | InFlag, dl); | ||||
2836 | if (!Ins.empty()) | ||||
2837 | InFlag = Chain.getValue(1); | ||||
2838 | |||||
2839 | // Handle result values, copying them out of physregs into vregs that we | ||||
2840 | // return. | ||||
2841 | return LowerCallResult(Chain, InFlag, CallConv, isVarArg, Ins, dl, DAG, | ||||
2842 | InVals, isThisReturn, | ||||
2843 | isThisReturn ? OutVals[0] : SDValue()); | ||||
2844 | } | ||||
2845 | |||||
2846 | /// HandleByVal - Every parameter *after* a byval parameter is passed | ||||
2847 | /// on the stack. Remember the next parameter register to allocate, | ||||
2848 | /// and then confiscate the rest of the parameter registers to insure | ||||
2849 | /// this. | ||||
2850 | void ARMTargetLowering::HandleByVal(CCState *State, unsigned &Size, | ||||
2851 | Align Alignment) const { | ||||
2852 | // Byval (as with any stack) slots are always at least 4 byte aligned. | ||||
2853 | Alignment = std::max(Alignment, Align(4)); | ||||
2854 | |||||
2855 | unsigned Reg = State->AllocateReg(GPRArgRegs); | ||||
2856 | if (!Reg) | ||||
2857 | return; | ||||
2858 | |||||
2859 | unsigned AlignInRegs = Alignment.value() / 4; | ||||
2860 | unsigned Waste = (ARM::R4 - Reg) % AlignInRegs; | ||||
2861 | for (unsigned i = 0; i < Waste; ++i) | ||||
2862 | Reg = State->AllocateReg(GPRArgRegs); | ||||
2863 | |||||
2864 | if (!Reg) | ||||
2865 | return; | ||||
2866 | |||||
2867 | unsigned Excess = 4 * (ARM::R4 - Reg); | ||||
2868 | |||||
2869 | // Special case when NSAA != SP and parameter size greater than size of | ||||
2870 | // all remained GPR regs. In that case we can't split parameter, we must | ||||
2871 | // send it to stack. We also must set NCRN to R4, so waste all | ||||
2872 | // remained registers. | ||||
2873 | const unsigned NSAAOffset = State->getNextStackOffset(); | ||||
2874 | if (NSAAOffset != 0 && Size > Excess) { | ||||
2875 | while (State->AllocateReg(GPRArgRegs)) | ||||
2876 | ; | ||||
2877 | return; | ||||
2878 | } | ||||
2879 | |||||
2880 | // First register for byval parameter is the first register that wasn't | ||||
2881 | // allocated before this method call, so it would be "reg". | ||||
2882 | // If parameter is small enough to be saved in range [reg, r4), then | ||||
2883 | // the end (first after last) register would be reg + param-size-in-regs, | ||||
2884 | // else parameter would be splitted between registers and stack, | ||||
2885 | // end register would be r4 in this case. | ||||
2886 | unsigned ByValRegBegin = Reg; | ||||
2887 | unsigned ByValRegEnd = std::min<unsigned>(Reg + Size / 4, ARM::R4); | ||||
2888 | State->addInRegsParamInfo(ByValRegBegin, ByValRegEnd); | ||||
2889 | // Note, first register is allocated in the beginning of function already, | ||||
2890 | // allocate remained amount of registers we need. | ||||
2891 | for (unsigned i = Reg + 1; i != ByValRegEnd; ++i) | ||||
2892 | State->AllocateReg(GPRArgRegs); | ||||
2893 | // A byval parameter that is split between registers and memory needs its | ||||
2894 | // size truncated here. | ||||
2895 | // In the case where the entire structure fits in registers, we set the | ||||
2896 | // size in memory to zero. | ||||
2897 | Size = std::max<int>(Size - Excess, 0); | ||||
2898 | } | ||||
2899 | |||||
2900 | /// MatchingStackOffset - Return true if the given stack call argument is | ||||
2901 | /// already available in the same position (relatively) of the caller's | ||||
2902 | /// incoming argument stack. | ||||
2903 | static | ||||
2904 | bool MatchingStackOffset(SDValue Arg, unsigned Offset, ISD::ArgFlagsTy Flags, | ||||
2905 | MachineFrameInfo &MFI, const MachineRegisterInfo *MRI, | ||||
2906 | const TargetInstrInfo *TII) { | ||||
2907 | unsigned Bytes = Arg.getValueSizeInBits() / 8; | ||||
2908 | int FI = std::numeric_limits<int>::max(); | ||||
2909 | if (Arg.getOpcode() == ISD::CopyFromReg) { | ||||
2910 | Register VR = cast<RegisterSDNode>(Arg.getOperand(1))->getReg(); | ||||
2911 | if (!Register::isVirtualRegister(VR)) | ||||
2912 | return false; | ||||
2913 | MachineInstr *Def = MRI->getVRegDef(VR); | ||||
2914 | if (!Def) | ||||
2915 | return false; | ||||
2916 | if (!Flags.isByVal()) { | ||||
2917 | if (!TII->isLoadFromStackSlot(*Def, FI)) | ||||
2918 | return false; | ||||
2919 | } else { | ||||
2920 | return false; | ||||
2921 | } | ||||
2922 | } else if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Arg)) { | ||||
2923 | if (Flags.isByVal()) | ||||
2924 | // ByVal argument is passed in as a pointer but it's now being | ||||
2925 | // dereferenced. e.g. | ||||
2926 | // define @foo(%struct.X* %A) { | ||||
2927 | // tail call @bar(%struct.X* byval %A) | ||||
2928 | // } | ||||
2929 | return false; | ||||
2930 | SDValue Ptr = Ld->getBasePtr(); | ||||
2931 | FrameIndexSDNode *FINode = dyn_cast<FrameIndexSDNode>(Ptr); | ||||
2932 | if (!FINode) | ||||
2933 | return false; | ||||
2934 | FI = FINode->getIndex(); | ||||
2935 | } else | ||||
2936 | return false; | ||||
2937 | |||||
2938 | assert(FI != std::numeric_limits<int>::max())(static_cast <bool> (FI != std::numeric_limits<int> ::max()) ? void (0) : __assert_fail ("FI != std::numeric_limits<int>::max()" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 2938, __extension__ __PRETTY_FUNCTION__)); | ||||
2939 | if (!MFI.isFixedObjectIndex(FI)) | ||||
2940 | return false; | ||||
2941 | return Offset == MFI.getObjectOffset(FI) && Bytes == MFI.getObjectSize(FI); | ||||
2942 | } | ||||
2943 | |||||
2944 | /// IsEligibleForTailCallOptimization - Check whether the call is eligible | ||||
2945 | /// for tail call optimization. Targets which want to do tail call | ||||
2946 | /// optimization should implement this function. | ||||
2947 | bool ARMTargetLowering::IsEligibleForTailCallOptimization( | ||||
2948 | SDValue Callee, CallingConv::ID CalleeCC, bool isVarArg, | ||||
2949 | bool isCalleeStructRet, bool isCallerStructRet, | ||||
2950 | const SmallVectorImpl<ISD::OutputArg> &Outs, | ||||
2951 | const SmallVectorImpl<SDValue> &OutVals, | ||||
2952 | const SmallVectorImpl<ISD::InputArg> &Ins, SelectionDAG &DAG, | ||||
2953 | const bool isIndirect) const { | ||||
2954 | MachineFunction &MF = DAG.getMachineFunction(); | ||||
2955 | const Function &CallerF = MF.getFunction(); | ||||
2956 | CallingConv::ID CallerCC = CallerF.getCallingConv(); | ||||
2957 | |||||
2958 | assert(Subtarget->supportsTailCall())(static_cast <bool> (Subtarget->supportsTailCall()) ? void (0) : __assert_fail ("Subtarget->supportsTailCall()" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 2958, __extension__ __PRETTY_FUNCTION__)); | ||||
2959 | |||||
2960 | // Indirect tail calls cannot be optimized for Thumb1 if the args | ||||
2961 | // to the call take up r0-r3. The reason is that there are no legal registers | ||||
2962 | // left to hold the pointer to the function to be called. | ||||
2963 | // Similarly, if the function uses return address sign and authentication, | ||||
2964 | // r12 is needed to hold the PAC and is not available to hold the callee | ||||
2965 | // address. | ||||
2966 | if (Outs.size() >= 4 && | ||||
2967 | (!isa<GlobalAddressSDNode>(Callee.getNode()) || isIndirect)) { | ||||
2968 | if (Subtarget->isThumb1Only()) | ||||
2969 | return false; | ||||
2970 | // Conservatively assume the function spills LR. | ||||
2971 | if (MF.getInfo<ARMFunctionInfo>()->shouldSignReturnAddress(true)) | ||||
2972 | return false; | ||||
2973 | } | ||||
2974 | |||||
2975 | // Look for obvious safe cases to perform tail call optimization that do not | ||||
2976 | // require ABI changes. This is what gcc calls sibcall. | ||||
2977 | |||||
2978 | // Exception-handling functions need a special set of instructions to indicate | ||||
2979 | // a return to the hardware. Tail-calling another function would probably | ||||
2980 | // break this. | ||||
2981 | if (CallerF.hasFnAttribute("interrupt")) | ||||
2982 | return false; | ||||
2983 | |||||
2984 | if (canGuaranteeTCO(CalleeCC, getTargetMachine().Options.GuaranteedTailCallOpt)) | ||||
2985 | return CalleeCC == CallerCC; | ||||
2986 | |||||
2987 | // Also avoid sibcall optimization if either caller or callee uses struct | ||||
2988 | // return semantics. | ||||
2989 | if (isCalleeStructRet || isCallerStructRet) | ||||
2990 | return false; | ||||
2991 | |||||
2992 | // Externally-defined functions with weak linkage should not be | ||||
2993 | // tail-called on ARM when the OS does not support dynamic | ||||
2994 | // pre-emption of symbols, as the AAELF spec requires normal calls | ||||
2995 | // to undefined weak functions to be replaced with a NOP or jump to the | ||||
2996 | // next instruction. The behaviour of branch instructions in this | ||||
2997 | // situation (as used for tail calls) is implementation-defined, so we | ||||
2998 | // cannot rely on the linker replacing the tail call with a return. | ||||
2999 | if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) { | ||||
3000 | const GlobalValue *GV = G->getGlobal(); | ||||
3001 | const Triple &TT = getTargetMachine().getTargetTriple(); | ||||
3002 | if (GV->hasExternalWeakLinkage() && | ||||
3003 | (!TT.isOSWindows() || TT.isOSBinFormatELF() || TT.isOSBinFormatMachO())) | ||||
3004 | return false; | ||||
3005 | } | ||||
3006 | |||||
3007 | // Check that the call results are passed in the same way. | ||||
3008 | LLVMContext &C = *DAG.getContext(); | ||||
3009 | if (!CCState::resultsCompatible( | ||||
3010 | getEffectiveCallingConv(CalleeCC, isVarArg), | ||||
3011 | getEffectiveCallingConv(CallerCC, CallerF.isVarArg()), MF, C, Ins, | ||||
3012 | CCAssignFnForReturn(CalleeCC, isVarArg), | ||||
3013 | CCAssignFnForReturn(CallerCC, CallerF.isVarArg()))) | ||||
3014 | return false; | ||||
3015 | // The callee has to preserve all registers the caller needs to preserve. | ||||
3016 | const ARMBaseRegisterInfo *TRI = Subtarget->getRegisterInfo(); | ||||
3017 | const uint32_t *CallerPreserved = TRI->getCallPreservedMask(MF, CallerCC); | ||||
3018 | if (CalleeCC != CallerCC) { | ||||
3019 | const uint32_t *CalleePreserved = TRI->getCallPreservedMask(MF, CalleeCC); | ||||
3020 | if (!TRI->regmaskSubsetEqual(CallerPreserved, CalleePreserved)) | ||||
3021 | return false; | ||||
3022 | } | ||||
3023 | |||||
3024 | // If Caller's vararg or byval argument has been split between registers and | ||||
3025 | // stack, do not perform tail call, since part of the argument is in caller's | ||||
3026 | // local frame. | ||||
3027 | const ARMFunctionInfo *AFI_Caller = MF.getInfo<ARMFunctionInfo>(); | ||||
3028 | if (AFI_Caller->getArgRegsSaveSize()) | ||||
3029 | return false; | ||||
3030 | |||||
3031 | // If the callee takes no arguments then go on to check the results of the | ||||
3032 | // call. | ||||
3033 | if (!Outs.empty()) { | ||||
3034 | // Check if stack adjustment is needed. For now, do not do this if any | ||||
3035 | // argument is passed on the stack. | ||||
3036 | SmallVector<CCValAssign, 16> ArgLocs; | ||||
3037 | CCState CCInfo(CalleeCC, isVarArg, MF, ArgLocs, C); | ||||
3038 | CCInfo.AnalyzeCallOperands(Outs, CCAssignFnForCall(CalleeCC, isVarArg)); | ||||
3039 | if (CCInfo.getNextStackOffset()) { | ||||
3040 | // Check if the arguments are already laid out in the right way as | ||||
3041 | // the caller's fixed stack objects. | ||||
3042 | MachineFrameInfo &MFI = MF.getFrameInfo(); | ||||
3043 | const MachineRegisterInfo *MRI = &MF.getRegInfo(); | ||||
3044 | const TargetInstrInfo *TII = Subtarget->getInstrInfo(); | ||||
3045 | for (unsigned i = 0, realArgIdx = 0, e = ArgLocs.size(); | ||||
3046 | i != e; | ||||
3047 | ++i, ++realArgIdx) { | ||||
3048 | CCValAssign &VA = ArgLocs[i]; | ||||
3049 | EVT RegVT = VA.getLocVT(); | ||||
3050 | SDValue Arg = OutVals[realArgIdx]; | ||||
3051 | ISD::ArgFlagsTy Flags = Outs[realArgIdx].Flags; | ||||
3052 | if (VA.getLocInfo() == CCValAssign::Indirect) | ||||
3053 | return false; | ||||
3054 | if (VA.needsCustom() && (RegVT == MVT::f64 || RegVT == MVT::v2f64)) { | ||||
3055 | // f64 and vector types are split into multiple registers or | ||||
3056 | // register/stack-slot combinations. The types will not match | ||||
3057 | // the registers; give up on memory f64 refs until we figure | ||||
3058 | // out what to do about this. | ||||
3059 | if (!VA.isRegLoc()) | ||||
3060 | return false; | ||||
3061 | if (!ArgLocs[++i].isRegLoc()) | ||||
3062 | return false; | ||||
3063 | if (RegVT == MVT::v2f64) { | ||||
3064 | if (!ArgLocs[++i].isRegLoc()) | ||||
3065 | return false; | ||||
3066 | if (!ArgLocs[++i].isRegLoc()) | ||||
3067 | return false; | ||||
3068 | } | ||||
3069 | } else if (!VA.isRegLoc()) { | ||||
3070 | if (!MatchingStackOffset(Arg, VA.getLocMemOffset(), Flags, | ||||
3071 | MFI, MRI, TII)) | ||||
3072 | return false; | ||||
3073 | } | ||||
3074 | } | ||||
3075 | } | ||||
3076 | |||||
3077 | const MachineRegisterInfo &MRI = MF.getRegInfo(); | ||||
3078 | if (!parametersInCSRMatch(MRI, CallerPreserved, ArgLocs, OutVals)) | ||||
3079 | return false; | ||||
3080 | } | ||||
3081 | |||||
3082 | return true; | ||||
3083 | } | ||||
3084 | |||||
3085 | bool | ||||
3086 | ARMTargetLowering::CanLowerReturn(CallingConv::ID CallConv, | ||||
3087 | MachineFunction &MF, bool isVarArg, | ||||
3088 | const SmallVectorImpl<ISD::OutputArg> &Outs, | ||||
3089 | LLVMContext &Context) const { | ||||
3090 | SmallVector<CCValAssign, 16> RVLocs; | ||||
3091 | CCState CCInfo(CallConv, isVarArg, MF, RVLocs, Context); | ||||
3092 | return CCInfo.CheckReturn(Outs, CCAssignFnForReturn(CallConv, isVarArg)); | ||||
3093 | } | ||||
3094 | |||||
3095 | static SDValue LowerInterruptReturn(SmallVectorImpl<SDValue> &RetOps, | ||||
3096 | const SDLoc &DL, SelectionDAG &DAG) { | ||||
3097 | const MachineFunction &MF = DAG.getMachineFunction(); | ||||
3098 | const Function &F = MF.getFunction(); | ||||
3099 | |||||
3100 | StringRef IntKind = F.getFnAttribute("interrupt").getValueAsString(); | ||||
3101 | |||||
3102 | // See ARM ARM v7 B1.8.3. On exception entry LR is set to a possibly offset | ||||
3103 | // version of the "preferred return address". These offsets affect the return | ||||
3104 | // instruction if this is a return from PL1 without hypervisor extensions. | ||||
3105 | // IRQ/FIQ: +4 "subs pc, lr, #4" | ||||
3106 | // SWI: 0 "subs pc, lr, #0" | ||||
3107 | // ABORT: +4 "subs pc, lr, #4" | ||||
3108 | // UNDEF: +4/+2 "subs pc, lr, #0" | ||||
3109 | // UNDEF varies depending on where the exception came from ARM or Thumb | ||||
3110 | // mode. Alongside GCC, we throw our hands up in disgust and pretend it's 0. | ||||
3111 | |||||
3112 | int64_t LROffset; | ||||
3113 | if (IntKind == "" || IntKind == "IRQ" || IntKind == "FIQ" || | ||||
3114 | IntKind == "ABORT") | ||||
3115 | LROffset = 4; | ||||
3116 | else if (IntKind == "SWI" || IntKind == "UNDEF") | ||||
3117 | LROffset = 0; | ||||
3118 | else | ||||
3119 | report_fatal_error("Unsupported interrupt attribute. If present, value " | ||||
3120 | "must be one of: IRQ, FIQ, SWI, ABORT or UNDEF"); | ||||
3121 | |||||
3122 | RetOps.insert(RetOps.begin() + 1, | ||||
3123 | DAG.getConstant(LROffset, DL, MVT::i32, false)); | ||||
3124 | |||||
3125 | return DAG.getNode(ARMISD::INTRET_FLAG, DL, MVT::Other, RetOps); | ||||
3126 | } | ||||
3127 | |||||
3128 | SDValue | ||||
3129 | ARMTargetLowering::LowerReturn(SDValue Chain, CallingConv::ID CallConv, | ||||
3130 | bool isVarArg, | ||||
3131 | const SmallVectorImpl<ISD::OutputArg> &Outs, | ||||
3132 | const SmallVectorImpl<SDValue> &OutVals, | ||||
3133 | const SDLoc &dl, SelectionDAG &DAG) const { | ||||
3134 | // CCValAssign - represent the assignment of the return value to a location. | ||||
3135 | SmallVector<CCValAssign, 16> RVLocs; | ||||
3136 | |||||
3137 | // CCState - Info about the registers and stack slots. | ||||
3138 | CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(), RVLocs, | ||||
3139 | *DAG.getContext()); | ||||
3140 | |||||
3141 | // Analyze outgoing return values. | ||||
3142 | CCInfo.AnalyzeReturn(Outs, CCAssignFnForReturn(CallConv, isVarArg)); | ||||
3143 | |||||
3144 | SDValue Flag; | ||||
3145 | SmallVector<SDValue, 4> RetOps; | ||||
3146 | RetOps.push_back(Chain); // Operand #0 = Chain (updated below) | ||||
3147 | bool isLittleEndian = Subtarget->isLittle(); | ||||
3148 | |||||
3149 | MachineFunction &MF = DAG.getMachineFunction(); | ||||
3150 | ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>(); | ||||
3151 | AFI->setReturnRegsCount(RVLocs.size()); | ||||
3152 | |||||
3153 | // Report error if cmse entry function returns structure through first ptr arg. | ||||
3154 | if (AFI->isCmseNSEntryFunction() && MF.getFunction().hasStructRetAttr()) { | ||||
3155 | // Note: using an empty SDLoc(), as the first line of the function is a | ||||
3156 | // better place to report than the last line. | ||||
3157 | DiagnosticInfoUnsupported Diag( | ||||
3158 | DAG.getMachineFunction().getFunction(), | ||||
3159 | "secure entry function would return value through pointer", | ||||
3160 | SDLoc().getDebugLoc()); | ||||
3161 | DAG.getContext()->diagnose(Diag); | ||||
3162 | } | ||||
3163 | |||||
3164 | // Copy the result values into the output registers. | ||||
3165 | for (unsigned i = 0, realRVLocIdx = 0; | ||||
3166 | i != RVLocs.size(); | ||||
3167 | ++i, ++realRVLocIdx) { | ||||
3168 | CCValAssign &VA = RVLocs[i]; | ||||
3169 | 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!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 3169, __extension__ __PRETTY_FUNCTION__)); | ||||
3170 | |||||
3171 | SDValue Arg = OutVals[realRVLocIdx]; | ||||
3172 | bool ReturnF16 = false; | ||||
3173 | |||||
3174 | if (Subtarget->hasFullFP16() && Subtarget->isTargetHardFloat()) { | ||||
3175 | // Half-precision return values can be returned like this: | ||||
3176 | // | ||||
3177 | // t11 f16 = fadd ... | ||||
3178 | // t12: i16 = bitcast t11 | ||||
3179 | // t13: i32 = zero_extend t12 | ||||
3180 | // t14: f32 = bitcast t13 <~~~~~~~ Arg | ||||
3181 | // | ||||
3182 | // to avoid code generation for bitcasts, we simply set Arg to the node | ||||
3183 | // that produces the f16 value, t11 in this case. | ||||
3184 | // | ||||
3185 | if (Arg.getValueType() == MVT::f32 && Arg.getOpcode() == ISD::BITCAST) { | ||||
3186 | SDValue ZE = Arg.getOperand(0); | ||||
3187 | if (ZE.getOpcode() == ISD::ZERO_EXTEND && ZE.getValueType() == MVT::i32) { | ||||
3188 | SDValue BC = ZE.getOperand(0); | ||||
3189 | if (BC.getOpcode() == ISD::BITCAST && BC.getValueType() == MVT::i16) { | ||||
3190 | Arg = BC.getOperand(0); | ||||
3191 | ReturnF16 = true; | ||||
3192 | } | ||||
3193 | } | ||||
3194 | } | ||||
3195 | } | ||||
3196 | |||||
3197 | switch (VA.getLocInfo()) { | ||||
3198 | default: llvm_unreachable("Unknown loc info!")::llvm::llvm_unreachable_internal("Unknown loc info!", "llvm/lib/Target/ARM/ARMISelLowering.cpp" , 3198); | ||||
3199 | case CCValAssign::Full: break; | ||||
3200 | case CCValAssign::BCvt: | ||||
3201 | if (!ReturnF16) | ||||
3202 | Arg = DAG.getNode(ISD::BITCAST, dl, VA.getLocVT(), Arg); | ||||
3203 | break; | ||||
3204 | } | ||||
3205 | |||||
3206 | // Mask f16 arguments if this is a CMSE nonsecure entry. | ||||
3207 | auto RetVT = Outs[realRVLocIdx].ArgVT; | ||||
3208 | if (AFI->isCmseNSEntryFunction() && (RetVT == MVT::f16)) { | ||||
3209 | if (VA.needsCustom() && VA.getValVT() == MVT::f16) { | ||||
3210 | Arg = MoveFromHPR(dl, DAG, VA.getLocVT(), VA.getValVT(), Arg); | ||||
3211 | } else { | ||||
3212 | auto LocBits = VA.getLocVT().getSizeInBits(); | ||||
3213 | auto MaskValue = APInt::getLowBitsSet(LocBits, RetVT.getSizeInBits()); | ||||
3214 | SDValue Mask = | ||||
3215 | DAG.getConstant(MaskValue, dl, MVT::getIntegerVT(LocBits)); | ||||
3216 | Arg = DAG.getNode(ISD::BITCAST, dl, MVT::getIntegerVT(LocBits), Arg); | ||||
3217 | Arg = DAG.getNode(ISD::AND, dl, MVT::getIntegerVT(LocBits), Arg, Mask); | ||||
3218 | Arg = DAG.getNode(ISD::BITCAST, dl, VA.getLocVT(), Arg); | ||||
3219 | } | ||||
3220 | } | ||||
3221 | |||||
3222 | if (VA.needsCustom() && | ||||
3223 | (VA.getLocVT() == MVT::v2f64 || VA.getLocVT() == MVT::f64)) { | ||||
3224 | if (VA.getLocVT() == MVT::v2f64) { | ||||
3225 | // Extract the first half and return it in two registers. | ||||
3226 | SDValue Half = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Arg, | ||||
3227 | DAG.getConstant(0, dl, MVT::i32)); | ||||
3228 | SDValue HalfGPRs = DAG.getNode(ARMISD::VMOVRRD, dl, | ||||
3229 | DAG.getVTList(MVT::i32, MVT::i32), Half); | ||||
3230 | |||||
3231 | Chain = | ||||
3232 | DAG.getCopyToReg(Chain, dl, VA.getLocReg(), | ||||
3233 | HalfGPRs.getValue(isLittleEndian ? 0 : 1), Flag); | ||||
3234 | Flag = Chain.getValue(1); | ||||
3235 | RetOps.push_back(DAG.getRegister(VA.getLocReg(), VA.getLocVT())); | ||||
3236 | VA = RVLocs[++i]; // skip ahead to next loc | ||||
3237 | Chain = | ||||
3238 | DAG.getCopyToReg(Chain, dl, VA.getLocReg(), | ||||
3239 | HalfGPRs.getValue(isLittleEndian ? 1 : 0), Flag); | ||||
3240 | Flag = Chain.getValue(1); | ||||
3241 | RetOps.push_back(DAG.getRegister(VA.getLocReg(), VA.getLocVT())); | ||||
3242 | VA = RVLocs[++i]; // skip ahead to next loc | ||||
3243 | |||||
3244 | // Extract the 2nd half and fall through to handle it as an f64 value. | ||||
3245 | Arg = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Arg, | ||||
3246 | DAG.getConstant(1, dl, MVT::i32)); | ||||
3247 | } | ||||
3248 | // Legalize ret f64 -> ret 2 x i32. We always have fmrrd if f64 is | ||||
3249 | // available. | ||||
3250 | SDValue fmrrd = DAG.getNode(ARMISD::VMOVRRD, dl, | ||||
3251 | DAG.getVTList(MVT::i32, MVT::i32), Arg); | ||||
3252 | Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), | ||||
3253 | fmrrd.getValue(isLittleEndian ? 0 : 1), Flag); | ||||
3254 | Flag = Chain.getValue(1); | ||||
3255 | RetOps.push_back(DAG.getRegister(VA.getLocReg(), VA.getLocVT())); | ||||
3256 | VA = RVLocs[++i]; // skip ahead to next loc | ||||
3257 | Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), | ||||
3258 | fmrrd.getValue(isLittleEndian ? 1 : 0), Flag); | ||||
3259 | } else | ||||
3260 | Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), Arg, Flag); | ||||
3261 | |||||
3262 | // Guarantee that all emitted copies are | ||||
3263 | // stuck together, avoiding something bad. | ||||
3264 | Flag = Chain.getValue(1); | ||||
3265 | RetOps.push_back(DAG.getRegister( | ||||
3266 | VA.getLocReg(), ReturnF16 ? Arg.getValueType() : VA.getLocVT())); | ||||
3267 | } | ||||
3268 | const ARMBaseRegisterInfo *TRI = Subtarget->getRegisterInfo(); | ||||
3269 | const MCPhysReg *I = | ||||
3270 | TRI->getCalleeSavedRegsViaCopy(&DAG.getMachineFunction()); | ||||
3271 | if (I) { | ||||
3272 | for (; *I; ++I) { | ||||
3273 | if (ARM::GPRRegClass.contains(*I)) | ||||
3274 | RetOps.push_back(DAG.getRegister(*I, MVT::i32)); | ||||
3275 | else if (ARM::DPRRegClass.contains(*I)) | ||||
3276 | RetOps.push_back(DAG.getRegister(*I, MVT::getFloatingPointVT(64))); | ||||
3277 | else | ||||
3278 | llvm_unreachable("Unexpected register class in CSRsViaCopy!")::llvm::llvm_unreachable_internal("Unexpected register class in CSRsViaCopy!" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 3278); | ||||
3279 | } | ||||
3280 | } | ||||
3281 | |||||
3282 | // Update chain and glue. | ||||
3283 | RetOps[0] = Chain; | ||||
3284 | if (Flag.getNode()) | ||||
3285 | RetOps.push_back(Flag); | ||||
3286 | |||||
3287 | // CPUs which aren't M-class use a special sequence to return from | ||||
3288 | // exceptions (roughly, any instruction setting pc and cpsr simultaneously, | ||||
3289 | // though we use "subs pc, lr, #N"). | ||||
3290 | // | ||||
3291 | // M-class CPUs actually use a normal return sequence with a special | ||||
3292 | // (hardware-provided) value in LR, so the normal code path works. | ||||
3293 | if (DAG.getMachineFunction().getFunction().hasFnAttribute("interrupt") && | ||||
3294 | !Subtarget->isMClass()) { | ||||
3295 | if (Subtarget->isThumb1Only()) | ||||
3296 | report_fatal_error("interrupt attribute is not supported in Thumb1"); | ||||
3297 | return LowerInterruptReturn(RetOps, dl, DAG); | ||||
3298 | } | ||||
3299 | |||||
3300 | ARMISD::NodeType RetNode = AFI->isCmseNSEntryFunction() ? ARMISD::SERET_FLAG : | ||||
3301 | ARMISD::RET_FLAG; | ||||
3302 | return DAG.getNode(RetNode, dl, MVT::Other, RetOps); | ||||
3303 | } | ||||
3304 | |||||
3305 | bool ARMTargetLowering::isUsedByReturnOnly(SDNode *N, SDValue &Chain) const { | ||||
3306 | if (N->getNumValues() != 1) | ||||
3307 | return false; | ||||
3308 | if (!N->hasNUsesOfValue(1, 0)) | ||||
3309 | return false; | ||||
3310 | |||||
3311 | SDValue TCChain = Chain; | ||||
3312 | SDNode *Copy = *N->use_begin(); | ||||
3313 | if (Copy->getOpcode() == ISD::CopyToReg) { | ||||
3314 | // If the copy has a glue operand, we conservatively assume it isn't safe to | ||||
3315 | // perform a tail call. | ||||
3316 | if (Copy->getOperand(Copy->getNumOperands()-1).getValueType() == MVT::Glue) | ||||
3317 | return false; | ||||
3318 | TCChain = Copy->getOperand(0); | ||||
3319 | } else if (Copy->getOpcode() == ARMISD::VMOVRRD) { | ||||
3320 | SDNode *VMov = Copy; | ||||
3321 | // f64 returned in a pair of GPRs. | ||||
3322 | SmallPtrSet<SDNode*, 2> Copies; | ||||
3323 | for (SDNode *U : VMov->uses()) { | ||||
3324 | if (U->getOpcode() != ISD::CopyToReg) | ||||
3325 | return false; | ||||
3326 | Copies.insert(U); | ||||
3327 | } | ||||
3328 | if (Copies.size() > 2) | ||||
3329 | return false; | ||||
3330 | |||||
3331 | for (SDNode *U : VMov->uses()) { | ||||
3332 | SDValue UseChain = U->getOperand(0); | ||||
3333 | if (Copies.count(UseChain.getNode())) | ||||
3334 | // Second CopyToReg | ||||
3335 | Copy = U; | ||||
3336 | else { | ||||
3337 | // We are at the top of this chain. | ||||
3338 | // If the copy has a glue operand, we conservatively assume it | ||||
3339 | // isn't safe to perform a tail call. | ||||
3340 | if (U->getOperand(U->getNumOperands() - 1).getValueType() == MVT::Glue) | ||||
3341 | return false; | ||||
3342 | // First CopyToReg | ||||
3343 | TCChain = UseChain; | ||||
3344 | } | ||||
3345 | } | ||||
3346 | } else if (Copy->getOpcode() == ISD::BITCAST) { | ||||
3347 | // f32 returned in a single GPR. | ||||
3348 | if (!Copy->hasOneUse()) | ||||
3349 | return false; | ||||
3350 | Copy = *Copy->use_begin(); | ||||
3351 | if (Copy->getOpcode() != ISD::CopyToReg || !Copy->hasNUsesOfValue(1, 0)) | ||||
3352 | return false; | ||||
3353 | // If the copy has a glue operand, we conservatively assume it isn't safe to | ||||
3354 | // perform a tail call. | ||||
3355 | if (Copy->getOperand(Copy->getNumOperands()-1).getValueType() == MVT::Glue) | ||||
3356 | return false; | ||||
3357 | TCChain = Copy->getOperand(0); | ||||
3358 | } else { | ||||
3359 | return false; | ||||
3360 | } | ||||
3361 | |||||
3362 | bool HasRet = false; | ||||
3363 | for (const SDNode *U : Copy->uses()) { | ||||
3364 | if (U->getOpcode() != ARMISD::RET_FLAG && | ||||
3365 | U->getOpcode() != ARMISD::INTRET_FLAG) | ||||
3366 | return false; | ||||
3367 | HasRet = true; | ||||
3368 | } | ||||
3369 | |||||
3370 | if (!HasRet) | ||||
3371 | return false; | ||||
3372 | |||||
3373 | Chain = TCChain; | ||||
3374 | return true; | ||||
3375 | } | ||||
3376 | |||||
3377 | bool ARMTargetLowering::mayBeEmittedAsTailCall(const CallInst *CI) const { | ||||
3378 | if (!Subtarget->supportsTailCall()) | ||||
3379 | return false; | ||||
3380 | |||||
3381 | if (!CI->isTailCall()) | ||||
3382 | return false; | ||||
3383 | |||||
3384 | return true; | ||||
3385 | } | ||||
3386 | |||||
3387 | // Trying to write a 64 bit value so need to split into two 32 bit values first, | ||||
3388 | // and pass the lower and high parts through. | ||||
3389 | static SDValue LowerWRITE_REGISTER(SDValue Op, SelectionDAG &DAG) { | ||||
3390 | SDLoc DL(Op); | ||||
3391 | SDValue WriteValue = Op->getOperand(2); | ||||
3392 | |||||
3393 | // This function is only supposed to be called for i64 type argument. | ||||
3394 | assert(WriteValue.getValueType() == MVT::i64(static_cast <bool> (WriteValue.getValueType() == MVT:: i64 && "LowerWRITE_REGISTER called for non-i64 type argument." ) ? void (0) : __assert_fail ("WriteValue.getValueType() == MVT::i64 && \"LowerWRITE_REGISTER called for non-i64 type argument.\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 3395, __extension__ __PRETTY_FUNCTION__)) | ||||
3395 | && "LowerWRITE_REGISTER called for non-i64 type argument.")(static_cast <bool> (WriteValue.getValueType() == MVT:: i64 && "LowerWRITE_REGISTER called for non-i64 type argument." ) ? void (0) : __assert_fail ("WriteValue.getValueType() == MVT::i64 && \"LowerWRITE_REGISTER called for non-i64 type argument.\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 3395, __extension__ __PRETTY_FUNCTION__)); | ||||
3396 | |||||
3397 | SDValue Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, MVT::i32, WriteValue, | ||||
3398 | DAG.getConstant(0, DL, MVT::i32)); | ||||
3399 | SDValue Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, MVT::i32, WriteValue, | ||||
3400 | DAG.getConstant(1, DL, MVT::i32)); | ||||
3401 | SDValue Ops[] = { Op->getOperand(0), Op->getOperand(1), Lo, Hi }; | ||||
3402 | return DAG.getNode(ISD::WRITE_REGISTER, DL, MVT::Other, Ops); | ||||
3403 | } | ||||
3404 | |||||
3405 | // ConstantPool, JumpTable, GlobalAddress, and ExternalSymbol are lowered as | ||||
3406 | // their target counterpart wrapped in the ARMISD::Wrapper node. Suppose N is | ||||
3407 | // one of the above mentioned nodes. It has to be wrapped because otherwise | ||||
3408 | // Select(N) returns N. So the raw TargetGlobalAddress nodes, etc. can only | ||||
3409 | // be used to form addressing mode. These wrapped nodes will be selected | ||||
3410 | // into MOVi. | ||||
3411 | SDValue ARMTargetLowering::LowerConstantPool(SDValue Op, | ||||
3412 | SelectionDAG &DAG) const { | ||||
3413 | EVT PtrVT = Op.getValueType(); | ||||
3414 | // FIXME there is no actual debug info here | ||||
3415 | SDLoc dl(Op); | ||||
3416 | ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op); | ||||
3417 | SDValue Res; | ||||
3418 | |||||
3419 | // When generating execute-only code Constant Pools must be promoted to the | ||||
3420 | // global data section. It's a bit ugly that we can't share them across basic | ||||
3421 | // blocks, but this way we guarantee that execute-only behaves correct with | ||||
3422 | // position-independent addressing modes. | ||||
3423 | if (Subtarget->genExecuteOnly()) { | ||||
3424 | auto AFI = DAG.getMachineFunction().getInfo<ARMFunctionInfo>(); | ||||
3425 | auto T = const_cast<Type*>(CP->getType()); | ||||
3426 | auto C = const_cast<Constant*>(CP->getConstVal()); | ||||
3427 | auto M = const_cast<Module*>(DAG.getMachineFunction(). | ||||
3428 | getFunction().getParent()); | ||||
3429 | auto GV = new GlobalVariable( | ||||
3430 | *M, T, /*isConstant=*/true, GlobalVariable::InternalLinkage, C, | ||||
3431 | Twine(DAG.getDataLayout().getPrivateGlobalPrefix()) + "CP" + | ||||
3432 | Twine(DAG.getMachineFunction().getFunctionNumber()) + "_" + | ||||
3433 | Twine(AFI->createPICLabelUId()) | ||||
3434 | ); | ||||
3435 | SDValue GA = DAG.getTargetGlobalAddress(dyn_cast<GlobalValue>(GV), | ||||
3436 | dl, PtrVT); | ||||
3437 | return LowerGlobalAddress(GA, DAG); | ||||
3438 | } | ||||
3439 | |||||
3440 | if (CP->isMachineConstantPoolEntry()) | ||||
3441 | Res = | ||||
3442 | DAG.getTargetConstantPool(CP->getMachineCPVal(), PtrVT, CP->getAlign()); | ||||
3443 | else | ||||
3444 | Res = DAG.getTargetConstantPool(CP->getConstVal(), PtrVT, CP->getAlign()); | ||||
3445 | return DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Res); | ||||
3446 | } | ||||
3447 | |||||
3448 | unsigned ARMTargetLowering::getJumpTableEncoding() const { | ||||
3449 | return MachineJumpTableInfo::EK_Inline; | ||||
3450 | } | ||||
3451 | |||||
3452 | SDValue ARMTargetLowering::LowerBlockAddress(SDValue Op, | ||||
3453 | SelectionDAG &DAG) const { | ||||
3454 | MachineFunction &MF = DAG.getMachineFunction(); | ||||
3455 | ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>(); | ||||
3456 | unsigned ARMPCLabelIndex = 0; | ||||
3457 | SDLoc DL(Op); | ||||
3458 | EVT PtrVT = getPointerTy(DAG.getDataLayout()); | ||||
3459 | const BlockAddress *BA = cast<BlockAddressSDNode>(Op)->getBlockAddress(); | ||||
3460 | SDValue CPAddr; | ||||
3461 | bool IsPositionIndependent = isPositionIndependent() || Subtarget->isROPI(); | ||||
3462 | if (!IsPositionIndependent) { | ||||
3463 | CPAddr = DAG.getTargetConstantPool(BA, PtrVT, Align(4)); | ||||
3464 | } else { | ||||
3465 | unsigned PCAdj = Subtarget->isThumb() ? 4 : 8; | ||||
3466 | ARMPCLabelIndex = AFI->createPICLabelUId(); | ||||
3467 | ARMConstantPoolValue *CPV = | ||||
3468 | ARMConstantPoolConstant::Create(BA, ARMPCLabelIndex, | ||||
3469 | ARMCP::CPBlockAddress, PCAdj); | ||||
3470 | CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, Align(4)); | ||||
3471 | } | ||||
3472 | CPAddr = DAG.getNode(ARMISD::Wrapper, DL, PtrVT, CPAddr); | ||||
3473 | SDValue Result = DAG.getLoad( | ||||
3474 | PtrVT, DL, DAG.getEntryNode(), CPAddr, | ||||
3475 | MachinePointerInfo::getConstantPool(DAG.getMachineFunction())); | ||||
3476 | if (!IsPositionIndependent) | ||||
3477 | return Result; | ||||
3478 | SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, DL, MVT::i32); | ||||
3479 | return DAG.getNode(ARMISD::PIC_ADD, DL, PtrVT, Result, PICLabel); | ||||
3480 | } | ||||
3481 | |||||
3482 | /// Convert a TLS address reference into the correct sequence of loads | ||||
3483 | /// and calls to compute the variable's address for Darwin, and return an | ||||
3484 | /// SDValue containing the final node. | ||||
3485 | |||||
3486 | /// Darwin only has one TLS scheme which must be capable of dealing with the | ||||
3487 | /// fully general situation, in the worst case. This means: | ||||
3488 | /// + "extern __thread" declaration. | ||||
3489 | /// + Defined in a possibly unknown dynamic library. | ||||
3490 | /// | ||||
3491 | /// The general system is that each __thread variable has a [3 x i32] descriptor | ||||
3492 | /// which contains information used by the runtime to calculate the address. The | ||||
3493 | /// only part of this the compiler needs to know about is the first word, which | ||||
3494 | /// contains a function pointer that must be called with the address of the | ||||
3495 | /// entire descriptor in "r0". | ||||
3496 | /// | ||||
3497 | /// Since this descriptor may be in a different unit, in general access must | ||||
3498 | /// proceed along the usual ARM rules. A common sequence to produce is: | ||||
3499 | /// | ||||
3500 | /// movw rT1, :lower16:_var$non_lazy_ptr | ||||
3501 | /// movt rT1, :upper16:_var$non_lazy_ptr | ||||
3502 | /// ldr r0, [rT1] | ||||
3503 | /// ldr rT2, [r0] | ||||
3504 | /// blx rT2 | ||||
3505 | /// [...address now in r0...] | ||||
3506 | SDValue | ||||
3507 | ARMTargetLowering::LowerGlobalTLSAddressDarwin(SDValue Op, | ||||
3508 | SelectionDAG &DAG) const { | ||||
3509 | assert(Subtarget->isTargetDarwin() &&(static_cast <bool> (Subtarget->isTargetDarwin() && "This function expects a Darwin target") ? void (0) : __assert_fail ("Subtarget->isTargetDarwin() && \"This function expects a Darwin target\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 3510, __extension__ __PRETTY_FUNCTION__)) | ||||
3510 | "This function expects a Darwin target")(static_cast <bool> (Subtarget->isTargetDarwin() && "This function expects a Darwin target") ? void (0) : __assert_fail ("Subtarget->isTargetDarwin() && \"This function expects a Darwin target\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 3510, __extension__ __PRETTY_FUNCTION__)); | ||||
3511 | SDLoc DL(Op); | ||||
3512 | |||||
3513 | // First step is to get the address of the actua global symbol. This is where | ||||
3514 | // the TLS descriptor lives. | ||||
3515 | SDValue DescAddr = LowerGlobalAddressDarwin(Op, DAG); | ||||
3516 | |||||
3517 | // The first entry in the descriptor is a function pointer that we must call | ||||
3518 | // to obtain the address of the variable. | ||||
3519 | SDValue Chain = DAG.getEntryNode(); | ||||
3520 | SDValue FuncTLVGet = DAG.getLoad( | ||||
3521 | MVT::i32, DL, Chain, DescAddr, | ||||
3522 | MachinePointerInfo::getGOT(DAG.getMachineFunction()), Align(4), | ||||
3523 | MachineMemOperand::MONonTemporal | MachineMemOperand::MODereferenceable | | ||||
3524 | MachineMemOperand::MOInvariant); | ||||
3525 | Chain = FuncTLVGet.getValue(1); | ||||
3526 | |||||
3527 | MachineFunction &F = DAG.getMachineFunction(); | ||||
3528 | MachineFrameInfo &MFI = F.getFrameInfo(); | ||||
3529 | MFI.setAdjustsStack(true); | ||||
3530 | |||||
3531 | // TLS calls preserve all registers except those that absolutely must be | ||||
3532 | // trashed: R0 (it takes an argument), LR (it's a call) and CPSR (let's not be | ||||
3533 | // silly). | ||||
3534 | auto TRI = | ||||
3535 | getTargetMachine().getSubtargetImpl(F.getFunction())->getRegisterInfo(); | ||||
3536 | auto ARI = static_cast<const ARMRegisterInfo *>(TRI); | ||||
3537 | const uint32_t *Mask = ARI->getTLSCallPreservedMask(DAG.getMachineFunction()); | ||||
3538 | |||||
3539 | // Finally, we can make the call. This is just a degenerate version of a | ||||
3540 | // normal AArch64 call node: r0 takes the address of the descriptor, and | ||||
3541 | // returns the address of the variable in this thread. | ||||
3542 | Chain = DAG.getCopyToReg(Chain, DL, ARM::R0, DescAddr, SDValue()); | ||||
3543 | Chain = | ||||
3544 | DAG.getNode(ARMISD::CALL, DL, DAG.getVTList(MVT::Other, MVT::Glue), | ||||
3545 | Chain, FuncTLVGet, DAG.getRegister(ARM::R0, MVT::i32), | ||||
3546 | DAG.getRegisterMask(Mask), Chain.getValue(1)); | ||||
3547 | return DAG.getCopyFromReg(Chain, DL, ARM::R0, MVT::i32, Chain.getValue(1)); | ||||
3548 | } | ||||
3549 | |||||
3550 | SDValue | ||||
3551 | ARMTargetLowering::LowerGlobalTLSAddressWindows(SDValue Op, | ||||
3552 | SelectionDAG &DAG) const { | ||||
3553 | assert(Subtarget->isTargetWindows() && "Windows specific TLS lowering")(static_cast <bool> (Subtarget->isTargetWindows() && "Windows specific TLS lowering") ? void (0) : __assert_fail ( "Subtarget->isTargetWindows() && \"Windows specific TLS lowering\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 3553, __extension__ __PRETTY_FUNCTION__)); | ||||
3554 | |||||
3555 | SDValue Chain = DAG.getEntryNode(); | ||||
3556 | EVT PtrVT = getPointerTy(DAG.getDataLayout()); | ||||
3557 | SDLoc DL(Op); | ||||
3558 | |||||
3559 | // Load the current TEB (thread environment block) | ||||
3560 | SDValue Ops[] = {Chain, | ||||
3561 | DAG.getTargetConstant(Intrinsic::arm_mrc, DL, MVT::i32), | ||||
3562 | DAG.getTargetConstant(15, DL, MVT::i32), | ||||
3563 | DAG.getTargetConstant(0, DL, MVT::i32), | ||||
3564 | DAG.getTargetConstant(13, DL, MVT::i32), | ||||
3565 | DAG.getTargetConstant(0, DL, MVT::i32), | ||||
3566 | DAG.getTargetConstant(2, DL, MVT::i32)}; | ||||
3567 | SDValue CurrentTEB = DAG.getNode(ISD::INTRINSIC_W_CHAIN, DL, | ||||
3568 | DAG.getVTList(MVT::i32, MVT::Other), Ops); | ||||
3569 | |||||
3570 | SDValue TEB = CurrentTEB.getValue(0); | ||||
3571 | Chain = CurrentTEB.getValue(1); | ||||
3572 | |||||
3573 | // Load the ThreadLocalStoragePointer from the TEB | ||||
3574 | // A pointer to the TLS array is located at offset 0x2c from the TEB. | ||||
3575 | SDValue TLSArray = | ||||
3576 | DAG.getNode(ISD::ADD, DL, PtrVT, TEB, DAG.getIntPtrConstant(0x2c, DL)); | ||||
3577 | TLSArray = DAG.getLoad(PtrVT, DL, Chain, TLSArray, MachinePointerInfo()); | ||||
3578 | |||||
3579 | // The pointer to the thread's TLS data area is at the TLS Index scaled by 4 | ||||
3580 | // offset into the TLSArray. | ||||
3581 | |||||
3582 | // Load the TLS index from the C runtime | ||||
3583 | SDValue TLSIndex = | ||||
3584 | DAG.getTargetExternalSymbol("_tls_index", PtrVT, ARMII::MO_NO_FLAG); | ||||
3585 | TLSIndex = DAG.getNode(ARMISD::Wrapper, DL, PtrVT, TLSIndex); | ||||
3586 | TLSIndex = DAG.getLoad(PtrVT, DL, Chain, TLSIndex, MachinePointerInfo()); | ||||
3587 | |||||
3588 | SDValue Slot = DAG.getNode(ISD::SHL, DL, PtrVT, TLSIndex, | ||||
3589 | DAG.getConstant(2, DL, MVT::i32)); | ||||
3590 | SDValue TLS = DAG.getLoad(PtrVT, DL, Chain, | ||||
3591 | DAG.getNode(ISD::ADD, DL, PtrVT, TLSArray, Slot), | ||||
3592 | MachinePointerInfo()); | ||||
3593 | |||||
3594 | // Get the offset of the start of the .tls section (section base) | ||||
3595 | const auto *GA = cast<GlobalAddressSDNode>(Op); | ||||
3596 | auto *CPV = ARMConstantPoolConstant::Create(GA->getGlobal(), ARMCP::SECREL); | ||||
3597 | SDValue Offset = DAG.getLoad( | ||||
3598 | PtrVT, DL, Chain, | ||||
3599 | DAG.getNode(ARMISD::Wrapper, DL, MVT::i32, | ||||
3600 | DAG.getTargetConstantPool(CPV, PtrVT, Align(4))), | ||||
3601 | MachinePointerInfo::getConstantPool(DAG.getMachineFunction())); | ||||
3602 | |||||
3603 | return DAG.getNode(ISD::ADD, DL, PtrVT, TLS, Offset); | ||||
3604 | } | ||||
3605 | |||||
3606 | // Lower ISD::GlobalTLSAddress using the "general dynamic" model | ||||
3607 | SDValue | ||||
3608 | ARMTargetLowering::LowerToTLSGeneralDynamicModel(GlobalAddressSDNode *GA, | ||||
3609 | SelectionDAG &DAG) const { | ||||
3610 | SDLoc dl(GA); | ||||
3611 | EVT PtrVT = getPointerTy(DAG.getDataLayout()); | ||||
3612 | unsigned char PCAdj = Subtarget->isThumb() ? 4 : 8; | ||||
3613 | MachineFunction &MF = DAG.getMachineFunction(); | ||||
3614 | ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>(); | ||||
3615 | unsigned ARMPCLabelIndex = AFI->createPICLabelUId(); | ||||
3616 | ARMConstantPoolValue *CPV = | ||||
3617 | ARMConstantPoolConstant::Create(GA->getGlobal(), ARMPCLabelIndex, | ||||
3618 | ARMCP::CPValue, PCAdj, ARMCP::TLSGD, true); | ||||
3619 | SDValue Argument = DAG.getTargetConstantPool(CPV, PtrVT, Align(4)); | ||||
3620 | Argument = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Argument); | ||||
3621 | Argument = DAG.getLoad( | ||||
3622 | PtrVT, dl, DAG.getEntryNode(), Argument, | ||||
3623 | MachinePointerInfo::getConstantPool(DAG.getMachineFunction())); | ||||
3624 | SDValue Chain = Argument.getValue(1); | ||||
3625 | |||||
3626 | SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, dl, MVT::i32); | ||||
3627 | Argument = DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Argument, PICLabel); | ||||
3628 | |||||
3629 | // call __tls_get_addr. | ||||
3630 | ArgListTy Args; | ||||
3631 | ArgListEntry Entry; | ||||
3632 | Entry.Node = Argument; | ||||
3633 | Entry.Ty = (Type *) Type::getInt32Ty(*DAG.getContext()); | ||||
3634 | Args.push_back(Entry); | ||||
3635 | |||||
3636 | // FIXME: is there useful debug info available here? | ||||
3637 | TargetLowering::CallLoweringInfo CLI(DAG); | ||||
3638 | CLI.setDebugLoc(dl).setChain(Chain).setLibCallee( | ||||
3639 | CallingConv::C, Type::getInt32Ty(*DAG.getContext()), | ||||
3640 | DAG.getExternalSymbol("__tls_get_addr", PtrVT), std::move(Args)); | ||||
3641 | |||||
3642 | std::pair<SDValue, SDValue> CallResult = LowerCallTo(CLI); | ||||
3643 | return CallResult.first; | ||||
3644 | } | ||||
3645 | |||||
3646 | // Lower ISD::GlobalTLSAddress using the "initial exec" or | ||||
3647 | // "local exec" model. | ||||
3648 | SDValue | ||||
3649 | ARMTargetLowering::LowerToTLSExecModels(GlobalAddressSDNode *GA, | ||||
3650 | SelectionDAG &DAG, | ||||
3651 | TLSModel::Model model) const { | ||||
3652 | const GlobalValue *GV = GA->getGlobal(); | ||||
3653 | SDLoc dl(GA); | ||||
3654 | SDValue Offset; | ||||
3655 | SDValue Chain = DAG.getEntryNode(); | ||||
3656 | EVT PtrVT = getPointerTy(DAG.getDataLayout()); | ||||
3657 | // Get the Thread Pointer | ||||
3658 | SDValue ThreadPointer = DAG.getNode(ARMISD::THREAD_POINTER, dl, PtrVT); | ||||
3659 | |||||
3660 | if (model == TLSModel::InitialExec) { | ||||
3661 | MachineFunction &MF = DAG.getMachineFunction(); | ||||
3662 | ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>(); | ||||
3663 | unsigned ARMPCLabelIndex = AFI->createPICLabelUId(); | ||||
3664 | // Initial exec model. | ||||
3665 | unsigned char PCAdj = Subtarget->isThumb() ? 4 : 8; | ||||
3666 | ARMConstantPoolValue *CPV = | ||||
3667 | ARMConstantPoolConstant::Create(GA->getGlobal(), ARMPCLabelIndex, | ||||
3668 | ARMCP::CPValue, PCAdj, ARMCP::GOTTPOFF, | ||||
3669 | true); | ||||
3670 | Offset = DAG.getTargetConstantPool(CPV, PtrVT, Align(4)); | ||||
3671 | Offset = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Offset); | ||||
3672 | Offset = DAG.getLoad( | ||||
3673 | PtrVT, dl, Chain, Offset, | ||||
3674 | MachinePointerInfo::getConstantPool(DAG.getMachineFunction())); | ||||
3675 | Chain = Offset.getValue(1); | ||||
3676 | |||||
3677 | SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, dl, MVT::i32); | ||||
3678 | Offset = DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Offset, PICLabel); | ||||
3679 | |||||
3680 | Offset = DAG.getLoad( | ||||
3681 | PtrVT, dl, Chain, Offset, | ||||
3682 | MachinePointerInfo::getConstantPool(DAG.getMachineFunction())); | ||||
3683 | } else { | ||||
3684 | // local exec model | ||||
3685 | assert(model == TLSModel::LocalExec)(static_cast <bool> (model == TLSModel::LocalExec) ? void (0) : __assert_fail ("model == TLSModel::LocalExec", "llvm/lib/Target/ARM/ARMISelLowering.cpp" , 3685, __extension__ __PRETTY_FUNCTION__)); | ||||
3686 | ARMConstantPoolValue *CPV = | ||||
3687 | ARMConstantPoolConstant::Create(GV, ARMCP::TPOFF); | ||||
3688 | Offset = DAG.getTargetConstantPool(CPV, PtrVT, Align(4)); | ||||
3689 | Offset = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Offset); | ||||
3690 | Offset = DAG.getLoad( | ||||
3691 | PtrVT, dl, Chain, Offset, | ||||
3692 | MachinePointerInfo::getConstantPool(DAG.getMachineFunction())); | ||||
3693 | } | ||||
3694 | |||||
3695 | // The address of the thread local variable is the add of the thread | ||||
3696 | // pointer with the offset of the variable. | ||||
3697 | return DAG.getNode(ISD::ADD, dl, PtrVT, ThreadPointer, Offset); | ||||
3698 | } | ||||
3699 | |||||
3700 | SDValue | ||||
3701 | ARMTargetLowering::LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const { | ||||
3702 | GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op); | ||||
3703 | if (DAG.getTarget().useEmulatedTLS()) | ||||
3704 | return LowerToTLSEmulatedModel(GA, DAG); | ||||
3705 | |||||
3706 | if (Subtarget->isTargetDarwin()) | ||||
3707 | return LowerGlobalTLSAddressDarwin(Op, DAG); | ||||
3708 | |||||
3709 | if (Subtarget->isTargetWindows()) | ||||
3710 | return LowerGlobalTLSAddressWindows(Op, DAG); | ||||
3711 | |||||
3712 | // TODO: implement the "local dynamic" model | ||||
3713 | assert(Subtarget->isTargetELF() && "Only ELF implemented here")(static_cast <bool> (Subtarget->isTargetELF() && "Only ELF implemented here") ? void (0) : __assert_fail ("Subtarget->isTargetELF() && \"Only ELF implemented here\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 3713, __extension__ __PRETTY_FUNCTION__)); | ||||
3714 | TLSModel::Model model = getTargetMachine().getTLSModel(GA->getGlobal()); | ||||
3715 | |||||
3716 | switch (model) { | ||||
3717 | case TLSModel::GeneralDynamic: | ||||
3718 | case TLSModel::LocalDynamic: | ||||
3719 | return LowerToTLSGeneralDynamicModel(GA, DAG); | ||||
3720 | case TLSModel::InitialExec: | ||||
3721 | case TLSModel::LocalExec: | ||||
3722 | return LowerToTLSExecModels(GA, DAG, model); | ||||
3723 | } | ||||
3724 | llvm_unreachable("bogus TLS model")::llvm::llvm_unreachable_internal("bogus TLS model", "llvm/lib/Target/ARM/ARMISelLowering.cpp" , 3724); | ||||
3725 | } | ||||
3726 | |||||
3727 | /// Return true if all users of V are within function F, looking through | ||||
3728 | /// ConstantExprs. | ||||
3729 | static bool allUsersAreInFunction(const Value *V, const Function *F) { | ||||
3730 | SmallVector<const User*,4> Worklist(V->users()); | ||||
3731 | while (!Worklist.empty()) { | ||||
3732 | auto *U = Worklist.pop_back_val(); | ||||
3733 | if (isa<ConstantExpr>(U)) { | ||||
3734 | append_range(Worklist, U->users()); | ||||
3735 | continue; | ||||
3736 | } | ||||
3737 | |||||
3738 | auto *I = dyn_cast<Instruction>(U); | ||||
3739 | if (!I || I->getParent()->getParent() != F) | ||||
3740 | return false; | ||||
3741 | } | ||||
3742 | return true; | ||||
3743 | } | ||||
3744 | |||||
3745 | static SDValue promoteToConstantPool(const ARMTargetLowering *TLI, | ||||
3746 | const GlobalValue *GV, SelectionDAG &DAG, | ||||
3747 | EVT PtrVT, const SDLoc &dl) { | ||||
3748 | // If we're creating a pool entry for a constant global with unnamed address, | ||||
3749 | // and the global is small enough, we can emit it inline into the constant pool | ||||
3750 | // to save ourselves an indirection. | ||||
3751 | // | ||||
3752 | // This is a win if the constant is only used in one function (so it doesn't | ||||
3753 | // need to be duplicated) or duplicating the constant wouldn't increase code | ||||
3754 | // size (implying the constant is no larger than 4 bytes). | ||||
3755 | const Function &F = DAG.getMachineFunction().getFunction(); | ||||
3756 | |||||
3757 | // We rely on this decision to inline being idemopotent and unrelated to the | ||||
3758 | // use-site. We know that if we inline a variable at one use site, we'll | ||||
3759 | // inline it elsewhere too (and reuse the constant pool entry). Fast-isel | ||||
3760 | // doesn't know about this optimization, so bail out if it's enabled else | ||||
3761 | // we could decide to inline here (and thus never emit the GV) but require | ||||
3762 | // the GV from fast-isel generated code. | ||||
3763 | if (!EnableConstpoolPromotion || | ||||
3764 | DAG.getMachineFunction().getTarget().Options.EnableFastISel) | ||||
3765 | return SDValue(); | ||||
3766 | |||||
3767 | auto *GVar = dyn_cast<GlobalVariable>(GV); | ||||
3768 | if (!GVar || !GVar->hasInitializer() || | ||||
3769 | !GVar->isConstant() || !GVar->hasGlobalUnnamedAddr() || | ||||
3770 | !GVar->hasLocalLinkage()) | ||||
3771 | return SDValue(); | ||||
3772 | |||||
3773 | // If we inline a value that contains relocations, we move the relocations | ||||
3774 | // from .data to .text. This is not allowed in position-independent code. | ||||
3775 | auto *Init = GVar->getInitializer(); | ||||
3776 | if ((TLI->isPositionIndependent() || TLI->getSubtarget()->isROPI()) && | ||||
3777 | Init->needsDynamicRelocation()) | ||||
3778 | return SDValue(); | ||||
3779 | |||||
3780 | // The constant islands pass can only really deal with alignment requests | ||||
3781 | // <= 4 bytes and cannot pad constants itself. Therefore we cannot promote | ||||
3782 | // any type wanting greater alignment requirements than 4 bytes. We also | ||||
3783 | // can only promote constants that are multiples of 4 bytes in size or | ||||
3784 | // are paddable to a multiple of 4. Currently we only try and pad constants | ||||
3785 | // that are strings for simplicity. | ||||
3786 | auto *CDAInit = dyn_cast<ConstantDataArray>(Init); | ||||
3787 | unsigned Size = DAG.getDataLayout().getTypeAllocSize(Init->getType()); | ||||
3788 | Align PrefAlign = DAG.getDataLayout().getPreferredAlign(GVar); | ||||
3789 | unsigned RequiredPadding = 4 - (Size % 4); | ||||
3790 | bool PaddingPossible = | ||||
3791 | RequiredPadding == 4 || (CDAInit && CDAInit->isString()); | ||||
3792 | if (!PaddingPossible || PrefAlign > 4 || Size > ConstpoolPromotionMaxSize || | ||||
3793 | Size == 0) | ||||
3794 | return SDValue(); | ||||
3795 | |||||
3796 | unsigned PaddedSize = Size + ((RequiredPadding == 4) ? 0 : RequiredPadding); | ||||
3797 | MachineFunction &MF = DAG.getMachineFunction(); | ||||
3798 | ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>(); | ||||
3799 | |||||
3800 | // We can't bloat the constant pool too much, else the ConstantIslands pass | ||||
3801 | // may fail to converge. If we haven't promoted this global yet (it may have | ||||
3802 | // multiple uses), and promoting it would increase the constant pool size (Sz | ||||
3803 | // > 4), ensure we have space to do so up to MaxTotal. | ||||
3804 | if (!AFI->getGlobalsPromotedToConstantPool().count(GVar) && Size > 4) | ||||
3805 | if (AFI->getPromotedConstpoolIncrease() + PaddedSize - 4 >= | ||||
3806 | ConstpoolPromotionMaxTotal) | ||||
3807 | return SDValue(); | ||||
3808 | |||||
3809 | // This is only valid if all users are in a single function; we can't clone | ||||
3810 | // the constant in general. The LLVM IR unnamed_addr allows merging | ||||
3811 | // constants, but not cloning them. | ||||
3812 | // | ||||
3813 | // We could potentially allow cloning if we could prove all uses of the | ||||
3814 | // constant in the current function don't care about the address, like | ||||
3815 | // printf format strings. But that isn't implemented for now. | ||||
3816 | if (!allUsersAreInFunction(GVar, &F)) | ||||
3817 | return SDValue(); | ||||
3818 | |||||
3819 | // We're going to inline this global. Pad it out if needed. | ||||
3820 | if (RequiredPadding != 4) { | ||||
3821 | StringRef S = CDAInit->getAsString(); | ||||
3822 | |||||
3823 | SmallVector<uint8_t,16> V(S.size()); | ||||
3824 | std::copy(S.bytes_begin(), S.bytes_end(), V.begin()); | ||||
3825 | while (RequiredPadding--) | ||||
3826 | V.push_back(0); | ||||
3827 | Init = ConstantDataArray::get(*DAG.getContext(), V); | ||||
3828 | } | ||||
3829 | |||||
3830 | auto CPVal = ARMConstantPoolConstant::Create(GVar, Init); | ||||
3831 | SDValue CPAddr = DAG.getTargetConstantPool(CPVal, PtrVT, Align(4)); | ||||
3832 | if (!AFI->getGlobalsPromotedToConstantPool().count(GVar)) { | ||||
3833 | AFI->markGlobalAsPromotedToConstantPool(GVar); | ||||
3834 | AFI->setPromotedConstpoolIncrease(AFI->getPromotedConstpoolIncrease() + | ||||
3835 | PaddedSize - 4); | ||||
3836 | } | ||||
3837 | ++NumConstpoolPromoted; | ||||
3838 | return DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr); | ||||
3839 | } | ||||
3840 | |||||
3841 | bool ARMTargetLowering::isReadOnly(const GlobalValue *GV) const { | ||||
3842 | if (const GlobalAlias *GA = dyn_cast<GlobalAlias>(GV)) | ||||
3843 | if (!(GV = GA->getAliaseeObject())) | ||||
3844 | return false; | ||||
3845 | if (const auto *V = dyn_cast<GlobalVariable>(GV)) | ||||
3846 | return V->isConstant(); | ||||
3847 | return isa<Function>(GV); | ||||
3848 | } | ||||
3849 | |||||
3850 | SDValue ARMTargetLowering::LowerGlobalAddress(SDValue Op, | ||||
3851 | SelectionDAG &DAG) const { | ||||
3852 | switch (Subtarget->getTargetTriple().getObjectFormat()) { | ||||
3853 | default: llvm_unreachable("unknown object format")::llvm::llvm_unreachable_internal("unknown object format", "llvm/lib/Target/ARM/ARMISelLowering.cpp" , 3853); | ||||
3854 | case Triple::COFF: | ||||
3855 | return LowerGlobalAddressWindows(Op, DAG); | ||||
3856 | case Triple::ELF: | ||||
3857 | return LowerGlobalAddressELF(Op, DAG); | ||||
3858 | case Triple::MachO: | ||||
3859 | return LowerGlobalAddressDarwin(Op, DAG); | ||||
3860 | } | ||||
3861 | } | ||||
3862 | |||||
3863 | SDValue ARMTargetLowering::LowerGlobalAddressELF(SDValue Op, | ||||
3864 | SelectionDAG &DAG) const { | ||||
3865 | EVT PtrVT = getPointerTy(DAG.getDataLayout()); | ||||
3866 | SDLoc dl(Op); | ||||
3867 | const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal(); | ||||
3868 | const TargetMachine &TM = getTargetMachine(); | ||||
3869 | bool IsRO = isReadOnly(GV); | ||||
3870 | |||||
3871 | // promoteToConstantPool only if not generating XO text section | ||||
3872 | if (TM.shouldAssumeDSOLocal(*GV->getParent(), GV) && !Subtarget->genExecuteOnly()) | ||||
3873 | if (SDValue V = promoteToConstantPool(this, GV, DAG, PtrVT, dl)) | ||||
3874 | return V; | ||||
3875 | |||||
3876 | if (isPositionIndependent()) { | ||||
3877 | bool UseGOT_PREL = !TM.shouldAssumeDSOLocal(*GV->getParent(), GV); | ||||
3878 | SDValue G = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0, | ||||
3879 | UseGOT_PREL ? ARMII::MO_GOT : 0); | ||||
3880 | SDValue Result = DAG.getNode(ARMISD::WrapperPIC, dl, PtrVT, G); | ||||
3881 | if (UseGOT_PREL) | ||||
3882 | Result = | ||||
3883 | DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), Result, | ||||
3884 | MachinePointerInfo::getGOT(DAG.getMachineFunction())); | ||||
3885 | return Result; | ||||
3886 | } else if (Subtarget->isROPI() && IsRO) { | ||||
3887 | // PC-relative. | ||||
3888 | SDValue G = DAG.getTargetGlobalAddress(GV, dl, PtrVT); | ||||
3889 | SDValue Result = DAG.getNode(ARMISD::WrapperPIC, dl, PtrVT, G); | ||||
3890 | return Result; | ||||
3891 | } else if (Subtarget->isRWPI() && !IsRO) { | ||||
3892 | // SB-relative. | ||||
3893 | SDValue RelAddr; | ||||
3894 | if (Subtarget->useMovt()) { | ||||
3895 | ++NumMovwMovt; | ||||
3896 | SDValue G = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0, ARMII::MO_SBREL); | ||||
3897 | RelAddr = DAG.getNode(ARMISD::Wrapper, dl, PtrVT, G); | ||||
3898 | } else { // use literal pool for address constant | ||||
3899 | ARMConstantPoolValue *CPV = | ||||
3900 | ARMConstantPoolConstant::Create(GV, ARMCP::SBREL); | ||||
3901 | SDValue CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, Align(4)); | ||||
3902 | CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr); | ||||
3903 | RelAddr = DAG.getLoad( | ||||
3904 | PtrVT, dl, DAG.getEntryNode(), CPAddr, | ||||
3905 | MachinePointerInfo::getConstantPool(DAG.getMachineFunction())); | ||||
3906 | } | ||||
3907 | SDValue SB = DAG.getCopyFromReg(DAG.getEntryNode(), dl, ARM::R9, PtrVT); | ||||
3908 | SDValue Result = DAG.getNode(ISD::ADD, dl, PtrVT, SB, RelAddr); | ||||
3909 | return Result; | ||||
3910 | } | ||||
3911 | |||||
3912 | // If we have T2 ops, we can materialize the address directly via movt/movw | ||||
3913 | // pair. This is always cheaper. | ||||
3914 | if (Subtarget->useMovt()) { | ||||
3915 | ++NumMovwMovt; | ||||
3916 | // FIXME: Once remat is capable of dealing with instructions with register | ||||
3917 | // operands, expand this into two nodes. | ||||
3918 | return DAG.getNode(ARMISD::Wrapper, dl, PtrVT, | ||||
3919 | DAG.getTargetGlobalAddress(GV, dl, PtrVT)); | ||||
3920 | } else { | ||||
3921 | SDValue CPAddr = DAG.getTargetConstantPool(GV, PtrVT, Align(4)); | ||||
3922 | CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr); | ||||
3923 | return DAG.getLoad( | ||||
3924 | PtrVT, dl, DAG.getEntryNode(), CPAddr, | ||||
3925 | MachinePointerInfo::getConstantPool(DAG.getMachineFunction())); | ||||
3926 | } | ||||
3927 | } | ||||
3928 | |||||
3929 | SDValue ARMTargetLowering::LowerGlobalAddressDarwin(SDValue Op, | ||||
3930 | SelectionDAG &DAG) const { | ||||
3931 | assert(!Subtarget->isROPI() && !Subtarget->isRWPI() &&(static_cast <bool> (!Subtarget->isROPI() && !Subtarget->isRWPI() && "ROPI/RWPI not currently supported for Darwin" ) ? void (0) : __assert_fail ("!Subtarget->isROPI() && !Subtarget->isRWPI() && \"ROPI/RWPI not currently supported for Darwin\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 3932, __extension__ __PRETTY_FUNCTION__)) | ||||
3932 | "ROPI/RWPI not currently supported for Darwin")(static_cast <bool> (!Subtarget->isROPI() && !Subtarget->isRWPI() && "ROPI/RWPI not currently supported for Darwin" ) ? void (0) : __assert_fail ("!Subtarget->isROPI() && !Subtarget->isRWPI() && \"ROPI/RWPI not currently supported for Darwin\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 3932, __extension__ __PRETTY_FUNCTION__)); | ||||
3933 | EVT PtrVT = getPointerTy(DAG.getDataLayout()); | ||||
3934 | SDLoc dl(Op); | ||||
3935 | const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal(); | ||||
3936 | |||||
3937 | if (Subtarget->useMovt()) | ||||
3938 | ++NumMovwMovt; | ||||
3939 | |||||
3940 | // FIXME: Once remat is capable of dealing with instructions with register | ||||
3941 | // operands, expand this into multiple nodes | ||||
3942 | unsigned Wrapper = | ||||
3943 | isPositionIndependent() ? ARMISD::WrapperPIC : ARMISD::Wrapper; | ||||
3944 | |||||
3945 | SDValue G = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0, ARMII::MO_NONLAZY); | ||||
3946 | SDValue Result = DAG.getNode(Wrapper, dl, PtrVT, G); | ||||
3947 | |||||
3948 | if (Subtarget->isGVIndirectSymbol(GV)) | ||||
3949 | Result = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), Result, | ||||
3950 | MachinePointerInfo::getGOT(DAG.getMachineFunction())); | ||||
3951 | return Result; | ||||
3952 | } | ||||
3953 | |||||
3954 | SDValue ARMTargetLowering::LowerGlobalAddressWindows(SDValue Op, | ||||
3955 | SelectionDAG &DAG) const { | ||||
3956 | assert(Subtarget->isTargetWindows() && "non-Windows COFF is not supported")(static_cast <bool> (Subtarget->isTargetWindows() && "non-Windows COFF is not supported") ? void (0) : __assert_fail ("Subtarget->isTargetWindows() && \"non-Windows COFF is not supported\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 3956, __extension__ __PRETTY_FUNCTION__)); | ||||
3957 | assert(Subtarget->useMovt() &&(static_cast <bool> (Subtarget->useMovt() && "Windows on ARM expects to use movw/movt") ? void (0) : __assert_fail ("Subtarget->useMovt() && \"Windows on ARM expects to use movw/movt\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 3958, __extension__ __PRETTY_FUNCTION__)) | ||||
3958 | "Windows on ARM expects to use movw/movt")(static_cast <bool> (Subtarget->useMovt() && "Windows on ARM expects to use movw/movt") ? void (0) : __assert_fail ("Subtarget->useMovt() && \"Windows on ARM expects to use movw/movt\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 3958, __extension__ __PRETTY_FUNCTION__)); | ||||
3959 | assert(!Subtarget->isROPI() && !Subtarget->isRWPI() &&(static_cast <bool> (!Subtarget->isROPI() && !Subtarget->isRWPI() && "ROPI/RWPI not currently supported for Windows" ) ? void (0) : __assert_fail ("!Subtarget->isROPI() && !Subtarget->isRWPI() && \"ROPI/RWPI not currently supported for Windows\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 3960, __extension__ __PRETTY_FUNCTION__)) | ||||
3960 | "ROPI/RWPI not currently supported for Windows")(static_cast <bool> (!Subtarget->isROPI() && !Subtarget->isRWPI() && "ROPI/RWPI not currently supported for Windows" ) ? void (0) : __assert_fail ("!Subtarget->isROPI() && !Subtarget->isRWPI() && \"ROPI/RWPI not currently supported for Windows\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 3960, __extension__ __PRETTY_FUNCTION__)); | ||||
3961 | |||||
3962 | const TargetMachine &TM = getTargetMachine(); | ||||
3963 | const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal(); | ||||
3964 | ARMII::TOF TargetFlags = ARMII::MO_NO_FLAG; | ||||
3965 | if (GV->hasDLLImportStorageClass()) | ||||
3966 | TargetFlags = ARMII::MO_DLLIMPORT; | ||||
3967 | else if (!TM.shouldAssumeDSOLocal(*GV->getParent(), GV)) | ||||
3968 | TargetFlags = ARMII::MO_COFFSTUB; | ||||
3969 | EVT PtrVT = getPointerTy(DAG.getDataLayout()); | ||||
3970 | SDValue Result; | ||||
3971 | SDLoc DL(Op); | ||||
3972 | |||||
3973 | ++NumMovwMovt; | ||||
3974 | |||||
3975 | // FIXME: Once remat is capable of dealing with instructions with register | ||||
3976 | // operands, expand this into two nodes. | ||||
3977 | Result = DAG.getNode(ARMISD::Wrapper, DL, PtrVT, | ||||
3978 | DAG.getTargetGlobalAddress(GV, DL, PtrVT, /*offset=*/0, | ||||
3979 | TargetFlags)); | ||||
3980 | if (TargetFlags & (ARMII::MO_DLLIMPORT | ARMII::MO_COFFSTUB)) | ||||
3981 | Result = DAG.getLoad(PtrVT, DL, DAG.getEntryNode(), Result, | ||||
3982 | MachinePointerInfo::getGOT(DAG.getMachineFunction())); | ||||
3983 | return Result; | ||||
3984 | } | ||||
3985 | |||||
3986 | SDValue | ||||
3987 | ARMTargetLowering::LowerEH_SJLJ_SETJMP(SDValue Op, SelectionDAG &DAG) const { | ||||
3988 | SDLoc dl(Op); | ||||
3989 | SDValue Val = DAG.getConstant(0, dl, MVT::i32); | ||||
3990 | return DAG.getNode(ARMISD::EH_SJLJ_SETJMP, dl, | ||||
3991 | DAG.getVTList(MVT::i32, MVT::Other), Op.getOperand(0), | ||||
3992 | Op.getOperand(1), Val); | ||||
3993 | } | ||||
3994 | |||||
3995 | SDValue | ||||
3996 | ARMTargetLowering::LowerEH_SJLJ_LONGJMP(SDValue Op, SelectionDAG &DAG) const { | ||||
3997 | SDLoc dl(Op); | ||||
3998 | return DAG.getNode(ARMISD::EH_SJLJ_LONGJMP, dl, MVT::Other, Op.getOperand(0), | ||||
3999 | Op.getOperand(1), DAG.getConstant(0, dl, MVT::i32)); | ||||
4000 | } | ||||
4001 | |||||
4002 | SDValue ARMTargetLowering::LowerEH_SJLJ_SETUP_DISPATCH(SDValue Op, | ||||
4003 | SelectionDAG &DAG) const { | ||||
4004 | SDLoc dl(Op); | ||||
4005 | return DAG.getNode(ARMISD::EH_SJLJ_SETUP_DISPATCH, dl, MVT::Other, | ||||
4006 | Op.getOperand(0)); | ||||
4007 | } | ||||
4008 | |||||
4009 | SDValue ARMTargetLowering::LowerINTRINSIC_VOID( | ||||
4010 | SDValue Op, SelectionDAG &DAG, const ARMSubtarget *Subtarget) const { | ||||
4011 | unsigned IntNo = | ||||
4012 | cast<ConstantSDNode>( | ||||
4013 | Op.getOperand(Op.getOperand(0).getValueType() == MVT::Other)) | ||||
4014 | ->getZExtValue(); | ||||
4015 | switch (IntNo) { | ||||
4016 | default: | ||||
4017 | return SDValue(); // Don't custom lower most intrinsics. | ||||
4018 | case Intrinsic::arm_gnu_eabi_mcount: { | ||||
4019 | MachineFunction &MF = DAG.getMachineFunction(); | ||||
4020 | EVT PtrVT = getPointerTy(DAG.getDataLayout()); | ||||
4021 | SDLoc dl(Op); | ||||
4022 | SDValue Chain = Op.getOperand(0); | ||||
4023 | // call "\01__gnu_mcount_nc" | ||||
4024 | const ARMBaseRegisterInfo *ARI = Subtarget->getRegisterInfo(); | ||||
4025 | const uint32_t *Mask = | ||||
4026 | ARI->getCallPreservedMask(DAG.getMachineFunction(), CallingConv::C); | ||||
4027 | 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\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 4027, __extension__ __PRETTY_FUNCTION__)); | ||||
4028 | // Mark LR an implicit live-in. | ||||
4029 | Register Reg = MF.addLiveIn(ARM::LR, getRegClassFor(MVT::i32)); | ||||
4030 | SDValue ReturnAddress = | ||||
4031 | DAG.getCopyFromReg(DAG.getEntryNode(), dl, Reg, PtrVT); | ||||
4032 | constexpr EVT ResultTys[] = {MVT::Other, MVT::Glue}; | ||||
4033 | SDValue Callee = | ||||
4034 | DAG.getTargetExternalSymbol("\01__gnu_mcount_nc", PtrVT, 0); | ||||
4035 | SDValue RegisterMask = DAG.getRegisterMask(Mask); | ||||
4036 | if (Subtarget->isThumb()) | ||||
4037 | return SDValue( | ||||
4038 | DAG.getMachineNode( | ||||
4039 | ARM::tBL_PUSHLR, dl, ResultTys, | ||||
4040 | {ReturnAddress, DAG.getTargetConstant(ARMCC::AL, dl, PtrVT), | ||||
4041 | DAG.getRegister(0, PtrVT), Callee, RegisterMask, Chain}), | ||||
4042 | 0); | ||||
4043 | return SDValue( | ||||
4044 | DAG.getMachineNode(ARM::BL_PUSHLR, dl, ResultTys, | ||||
4045 | {ReturnAddress, Callee, RegisterMask, Chain}), | ||||
4046 | 0); | ||||
4047 | } | ||||
4048 | } | ||||
4049 | } | ||||
4050 | |||||
4051 | SDValue | ||||
4052 | ARMTargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG, | ||||
4053 | const ARMSubtarget *Subtarget) const { | ||||
4054 | unsigned IntNo = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue(); | ||||
4055 | SDLoc dl(Op); | ||||
4056 | switch (IntNo) { | ||||
4057 | default: return SDValue(); // Don't custom lower most intrinsics. | ||||
4058 | case Intrinsic::thread_pointer: { | ||||
4059 | EVT PtrVT = getPointerTy(DAG.getDataLayout()); | ||||
4060 | return DAG.getNode(ARMISD::THREAD_POINTER, dl, PtrVT); | ||||
4061 | } | ||||
4062 | case Intrinsic::arm_cls: { | ||||
4063 | const SDValue &Operand = Op.getOperand(1); | ||||
4064 | const EVT VTy = Op.getValueType(); | ||||
4065 | SDValue SRA = | ||||
4066 | DAG.getNode(ISD::SRA, dl, VTy, Operand, DAG.getConstant(31, dl, VTy)); | ||||
4067 | SDValue XOR = DAG.getNode(ISD::XOR, dl, VTy, SRA, Operand); | ||||
4068 | SDValue SHL = | ||||
4069 | DAG.getNode(ISD::SHL, dl, VTy, XOR, DAG.getConstant(1, dl, VTy)); | ||||
4070 | SDValue OR = | ||||
4071 | DAG.getNode(ISD::OR, dl, VTy, SHL, DAG.getConstant(1, dl, VTy)); | ||||
4072 | SDValue Result = DAG.getNode(ISD::CTLZ, dl, VTy, OR); | ||||
4073 | return Result; | ||||
4074 | } | ||||
4075 | case Intrinsic::arm_cls64: { | ||||
4076 | // cls(x) = if cls(hi(x)) != 31 then cls(hi(x)) | ||||
4077 | // else 31 + clz(if hi(x) == 0 then lo(x) else not(lo(x))) | ||||
4078 | const SDValue &Operand = Op.getOperand(1); | ||||
4079 | const EVT VTy = Op.getValueType(); | ||||
4080 | |||||
4081 | SDValue Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, VTy, Operand, | ||||
4082 | DAG.getConstant(1, dl, VTy)); | ||||
4083 | SDValue Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, VTy, Operand, | ||||
4084 | DAG.getConstant(0, dl, VTy)); | ||||
4085 | SDValue Constant0 = DAG.getConstant(0, dl, VTy); | ||||
4086 | SDValue Constant1 = DAG.getConstant(1, dl, VTy); | ||||
4087 | SDValue Constant31 = DAG.getConstant(31, dl, VTy); | ||||
4088 | SDValue SRAHi = DAG.getNode(ISD::SRA, dl, VTy, Hi, Constant31); | ||||
4089 | SDValue XORHi = DAG.getNode(ISD::XOR, dl, VTy, SRAHi, Hi); | ||||
4090 | SDValue SHLHi = DAG.getNode(ISD::SHL, dl, VTy, XORHi, Constant1); | ||||
4091 | SDValue ORHi = DAG.getNode(ISD::OR, dl, VTy, SHLHi, Constant1); | ||||
4092 | SDValue CLSHi = DAG.getNode(ISD::CTLZ, dl, VTy, ORHi); | ||||
4093 | SDValue CheckLo = | ||||
4094 | DAG.getSetCC(dl, MVT::i1, CLSHi, Constant31, ISD::CondCode::SETEQ); | ||||
4095 | SDValue HiIsZero = | ||||
4096 | DAG.getSetCC(dl, MVT::i1, Hi, Constant0, ISD::CondCode::SETEQ); | ||||
4097 | SDValue AdjustedLo = | ||||
4098 | DAG.getSelect(dl, VTy, HiIsZero, Lo, DAG.getNOT(dl, Lo, VTy)); | ||||
4099 | SDValue CLZAdjustedLo = DAG.getNode(ISD::CTLZ, dl, VTy, AdjustedLo); | ||||
4100 | SDValue Result = | ||||
4101 | DAG.getSelect(dl, VTy, CheckLo, | ||||
4102 | DAG.getNode(ISD::ADD, dl, VTy, CLZAdjustedLo, Constant31), CLSHi); | ||||
4103 | return Result; | ||||
4104 | } | ||||
4105 | case Intrinsic::eh_sjlj_lsda: { | ||||
4106 | MachineFunction &MF = DAG.getMachineFunction(); | ||||
4107 | ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>(); | ||||
4108 | unsigned ARMPCLabelIndex = AFI->createPICLabelUId(); | ||||
4109 | EVT PtrVT = getPointerTy(DAG.getDataLayout()); | ||||
4110 | SDValue CPAddr; | ||||
4111 | bool IsPositionIndependent = isPositionIndependent(); | ||||
4112 | unsigned PCAdj = IsPositionIndependent ? (Subtarget->isThumb() ? 4 : 8) : 0; | ||||
4113 | ARMConstantPoolValue *CPV = | ||||
4114 | ARMConstantPoolConstant::Create(&MF.getFunction(), ARMPCLabelIndex, | ||||
4115 | ARMCP::CPLSDA, PCAdj); | ||||
4116 | CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, Align(4)); | ||||
4117 | CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr); | ||||
4118 | SDValue Result = DAG.getLoad( | ||||
4119 | PtrVT, dl, DAG.getEntryNode(), CPAddr, | ||||
4120 | MachinePointerInfo::getConstantPool(DAG.getMachineFunction())); | ||||
4121 | |||||
4122 | if (IsPositionIndependent) { | ||||
4123 | SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, dl, MVT::i32); | ||||
4124 | Result = DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Result, PICLabel); | ||||
4125 | } | ||||
4126 | return Result; | ||||
4127 | } | ||||
4128 | case Intrinsic::arm_neon_vabs: | ||||
4129 | return DAG.getNode(ISD::ABS, SDLoc(Op), Op.getValueType(), | ||||
4130 | Op.getOperand(1)); | ||||
4131 | case Intrinsic::arm_neon_vmulls: | ||||
4132 | case Intrinsic::arm_neon_vmullu: { | ||||
4133 | unsigned NewOpc = (IntNo == Intrinsic::arm_neon_vmulls) | ||||
4134 | ? ARMISD::VMULLs : ARMISD::VMULLu; | ||||
4135 | return DAG.getNode(NewOpc, SDLoc(Op), Op.getValueType(), | ||||
4136 | Op.getOperand(1), Op.getOperand(2)); | ||||
4137 | } | ||||
4138 | case Intrinsic::arm_neon_vminnm: | ||||
4139 | case Intrinsic::arm_neon_vmaxnm: { | ||||
4140 | unsigned NewOpc = (IntNo == Intrinsic::arm_neon_vminnm) | ||||
4141 | ? ISD::FMINNUM : ISD::FMAXNUM; | ||||
4142 | return DAG.getNode(NewOpc, SDLoc(Op), Op.getValueType(), | ||||
4143 | Op.getOperand(1), Op.getOperand(2)); | ||||
4144 | } | ||||
4145 | case Intrinsic::arm_neon_vminu: | ||||
4146 | case Intrinsic::arm_neon_vmaxu: { | ||||
4147 | if (Op.getValueType().isFloatingPoint()) | ||||
4148 | return SDValue(); | ||||
4149 | unsigned NewOpc = (IntNo == Intrinsic::arm_neon_vminu) | ||||
4150 | ? ISD::UMIN : ISD::UMAX; | ||||
4151 | return DAG.getNode(NewOpc, SDLoc(Op), Op.getValueType(), | ||||
4152 | Op.getOperand(1), Op.getOperand(2)); | ||||
4153 | } | ||||
4154 | case Intrinsic::arm_neon_vmins: | ||||
4155 | case Intrinsic::arm_neon_vmaxs: { | ||||
4156 | // v{min,max}s is overloaded between signed integers and floats. | ||||
4157 | if (!Op.getValueType().isFloatingPoint()) { | ||||
4158 | unsigned NewOpc = (IntNo == Intrinsic::arm_neon_vmins) | ||||
4159 | ? ISD::SMIN : ISD::SMAX; | ||||
4160 | return DAG.getNode(NewOpc, SDLoc(Op), Op.getValueType(), | ||||
4161 | Op.getOperand(1), Op.getOperand(2)); | ||||
4162 | } | ||||
4163 | unsigned NewOpc = (IntNo == Intrinsic::arm_neon_vmins) | ||||
4164 | ? ISD::FMINIMUM : ISD::FMAXIMUM; | ||||
4165 | return DAG.getNode(NewOpc, SDLoc(Op), Op.getValueType(), | ||||
4166 | Op.getOperand(1), Op.getOperand(2)); | ||||
4167 | } | ||||
4168 | case Intrinsic::arm_neon_vtbl1: | ||||
4169 | return DAG.getNode(ARMISD::VTBL1, SDLoc(Op), Op.getValueType(), | ||||
4170 | Op.getOperand(1), Op.getOperand(2)); | ||||
4171 | case Intrinsic::arm_neon_vtbl2: | ||||
4172 | return DAG.getNode(ARMISD::VTBL2, SDLoc(Op), Op.getValueType(), | ||||
4173 | Op.getOperand(1), Op.getOperand(2), Op.getOperand(3)); | ||||
4174 | case Intrinsic::arm_mve_pred_i2v: | ||||
4175 | case Intrinsic::arm_mve_pred_v2i: | ||||
4176 | return DAG.getNode(ARMISD::PREDICATE_CAST, SDLoc(Op), Op.getValueType(), | ||||
4177 | Op.getOperand(1)); | ||||
4178 | case Intrinsic::arm_mve_vreinterpretq: | ||||
4179 | return DAG.getNode(ARMISD::VECTOR_REG_CAST, SDLoc(Op), Op.getValueType(), | ||||
4180 | Op.getOperand(1)); | ||||
4181 | case Intrinsic::arm_mve_lsll: | ||||
4182 | return DAG.getNode(ARMISD::LSLL, SDLoc(Op), Op->getVTList(), | ||||
4183 | Op.getOperand(1), Op.getOperand(2), Op.getOperand(3)); | ||||
4184 | case Intrinsic::arm_mve_asrl: | ||||
4185 | return DAG.getNode(ARMISD::ASRL, SDLoc(Op), Op->getVTList(), | ||||
4186 | Op.getOperand(1), Op.getOperand(2), Op.getOperand(3)); | ||||
4187 | } | ||||
4188 | } | ||||
4189 | |||||
4190 | static SDValue LowerATOMIC_FENCE(SDValue Op, SelectionDAG &DAG, | ||||
4191 | const ARMSubtarget *Subtarget) { | ||||
4192 | SDLoc dl(Op); | ||||
4193 | ConstantSDNode *SSIDNode = cast<ConstantSDNode>(Op.getOperand(2)); | ||||
4194 | auto SSID = static_cast<SyncScope::ID>(SSIDNode->getZExtValue()); | ||||
4195 | if (SSID == SyncScope::SingleThread) | ||||
4196 | return Op; | ||||
4197 | |||||
4198 | if (!Subtarget->hasDataBarrier()) { | ||||
4199 | // Some ARMv6 cpus can support data barriers with an mcr instruction. | ||||
4200 | // Thumb1 and pre-v6 ARM mode use a libcall instead and should never get | ||||
4201 | // here. | ||||
4202 | assert(Subtarget->hasV6Ops() && !Subtarget->isThumb() &&(static_cast <bool> (Subtarget->hasV6Ops() && !Subtarget->isThumb() && "Unexpected ISD::ATOMIC_FENCE encountered. Should be libcall!" ) ? void (0) : __assert_fail ("Subtarget->hasV6Ops() && !Subtarget->isThumb() && \"Unexpected ISD::ATOMIC_FENCE encountered. Should be libcall!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 4203, __extension__ __PRETTY_FUNCTION__)) | ||||
4203 | "Unexpected ISD::ATOMIC_FENCE encountered. Should be libcall!")(static_cast <bool> (Subtarget->hasV6Ops() && !Subtarget->isThumb() && "Unexpected ISD::ATOMIC_FENCE encountered. Should be libcall!" ) ? void (0) : __assert_fail ("Subtarget->hasV6Ops() && !Subtarget->isThumb() && \"Unexpected ISD::ATOMIC_FENCE encountered. Should be libcall!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 4203, __extension__ __PRETTY_FUNCTION__)); | ||||
4204 | return DAG.getNode(ARMISD::MEMBARRIER_MCR, dl, MVT::Other, Op.getOperand(0), | ||||
4205 | DAG.getConstant(0, dl, MVT::i32)); | ||||
4206 | } | ||||
4207 | |||||
4208 | ConstantSDNode *OrdN = cast<ConstantSDNode>(Op.getOperand(1)); | ||||
4209 | AtomicOrdering Ord = static_cast<AtomicOrdering>(OrdN->getZExtValue()); | ||||
4210 | ARM_MB::MemBOpt Domain = ARM_MB::ISH; | ||||
4211 | if (Subtarget->isMClass()) { | ||||
4212 | // Only a full system barrier exists in the M-class architectures. | ||||
4213 | Domain = ARM_MB::SY; | ||||
4214 | } else if (Subtarget->preferISHSTBarriers() && | ||||
4215 | Ord == AtomicOrdering::Release) { | ||||
4216 | // Swift happens to implement ISHST barriers in a way that's compatible with | ||||
4217 | // Release semantics but weaker than ISH so we'd be fools not to use | ||||
4218 | // it. Beware: other processors probably don't! | ||||
4219 | Domain = ARM_MB::ISHST; | ||||
4220 | } | ||||
4221 | |||||
4222 | return DAG.getNode(ISD::INTRINSIC_VOID, dl, MVT::Other, Op.getOperand(0), | ||||
4223 | DAG.getConstant(Intrinsic::arm_dmb, dl, MVT::i32), | ||||
4224 | DAG.getConstant(Domain, dl, MVT::i32)); | ||||
4225 | } | ||||
4226 | |||||
4227 | static SDValue LowerPREFETCH(SDValue Op, SelectionDAG &DAG, | ||||
4228 | const ARMSubtarget *Subtarget) { | ||||
4229 | // ARM pre v5TE and Thumb1 does not have preload instructions. | ||||
4230 | if (!(Subtarget->isThumb2() || | ||||
4231 | (!Subtarget->isThumb1Only() && Subtarget->hasV5TEOps()))) | ||||
4232 | // Just preserve the chain. | ||||
4233 | return Op.getOperand(0); | ||||
4234 | |||||
4235 | SDLoc dl(Op); | ||||
4236 | unsigned isRead = ~cast<ConstantSDNode>(Op.getOperand(2))->getZExtValue() & 1; | ||||
4237 | if (!isRead && | ||||
4238 | (!Subtarget->hasV7Ops() || !Subtarget->hasMPExtension())) | ||||
4239 | // ARMv7 with MP extension has PLDW. | ||||
4240 | return Op.getOperand(0); | ||||
4241 | |||||
4242 | unsigned isData = cast<ConstantSDNode>(Op.getOperand(4))->getZExtValue(); | ||||
4243 | if (Subtarget->isThumb()) { | ||||
4244 | // Invert the bits. | ||||
4245 | isRead = ~isRead & 1; | ||||
4246 | isData = ~isData & 1; | ||||
4247 | } | ||||
4248 | |||||
4249 | return DAG.getNode(ARMISD::PRELOAD, dl, MVT::Other, Op.getOperand(0), | ||||
4250 | Op.getOperand(1), DAG.getConstant(isRead, dl, MVT::i32), | ||||
4251 | DAG.getConstant(isData, dl, MVT::i32)); | ||||
4252 | } | ||||
4253 | |||||
4254 | static SDValue LowerVASTART(SDValue Op, SelectionDAG &DAG) { | ||||
4255 | MachineFunction &MF = DAG.getMachineFunction(); | ||||
4256 | ARMFunctionInfo *FuncInfo = MF.getInfo<ARMFunctionInfo>(); | ||||
4257 | |||||
4258 | // vastart just stores the address of the VarArgsFrameIndex slot into the | ||||
4259 | // memory location argument. | ||||
4260 | SDLoc dl(Op); | ||||
4261 | EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy(DAG.getDataLayout()); | ||||
4262 | SDValue FR = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(), PtrVT); | ||||
4263 | const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue(); | ||||
4264 | return DAG.getStore(Op.getOperand(0), dl, FR, Op.getOperand(1), | ||||
4265 | MachinePointerInfo(SV)); | ||||
4266 | } | ||||
4267 | |||||
4268 | SDValue ARMTargetLowering::GetF64FormalArgument(CCValAssign &VA, | ||||
4269 | CCValAssign &NextVA, | ||||
4270 | SDValue &Root, | ||||
4271 | SelectionDAG &DAG, | ||||
4272 | const SDLoc &dl) const { | ||||
4273 | MachineFunction &MF = DAG.getMachineFunction(); | ||||
4274 | ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>(); | ||||
4275 | |||||
4276 | const TargetRegisterClass *RC; | ||||
4277 | if (AFI->isThumb1OnlyFunction()) | ||||
4278 | RC = &ARM::tGPRRegClass; | ||||
4279 | else | ||||
4280 | RC = &ARM::GPRRegClass; | ||||
4281 | |||||
4282 | // Transform the arguments stored in physical registers into virtual ones. | ||||
4283 | Register Reg = MF.addLiveIn(VA.getLocReg(), RC); | ||||
4284 | SDValue ArgValue = DAG.getCopyFromReg(Root, dl, Reg, MVT::i32); | ||||
4285 | |||||
4286 | SDValue ArgValue2; | ||||
4287 | if (NextVA.isMemLoc()) { | ||||
4288 | MachineFrameInfo &MFI = MF.getFrameInfo(); | ||||
4289 | int FI = MFI.CreateFixedObject(4, NextVA.getLocMemOffset(), true); | ||||
4290 | |||||
4291 | // Create load node to retrieve arguments from the stack. | ||||
4292 | SDValue FIN = DAG.getFrameIndex(FI, getPointerTy(DAG.getDataLayout())); | ||||
4293 | ArgValue2 = DAG.getLoad( | ||||
4294 | MVT::i32, dl, Root, FIN, | ||||
4295 | MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), FI)); | ||||
4296 | } else { | ||||
4297 | Reg = MF.addLiveIn(NextVA.getLocReg(), RC); | ||||
4298 | ArgValue2 = DAG.getCopyFromReg(Root, dl, Reg, MVT::i32); | ||||
4299 | } | ||||
4300 | if (!Subtarget->isLittle()) | ||||
4301 | std::swap (ArgValue, ArgValue2); | ||||
4302 | return DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, ArgValue, ArgValue2); | ||||
4303 | } | ||||
4304 | |||||
4305 | // The remaining GPRs hold either the beginning of variable-argument | ||||
4306 | // data, or the beginning of an aggregate passed by value (usually | ||||
4307 | // byval). Either way, we allocate stack slots adjacent to the data | ||||
4308 | // provided by our caller, and store the unallocated registers there. | ||||
4309 | // If this is a variadic function, the va_list pointer will begin with | ||||
4310 | // these values; otherwise, this reassembles a (byval) structure that | ||||
4311 | // was split between registers and memory. | ||||
4312 | // Return: The frame index registers were stored into. | ||||
4313 | int ARMTargetLowering::StoreByValRegs(CCState &CCInfo, SelectionDAG &DAG, | ||||
4314 | const SDLoc &dl, SDValue &Chain, | ||||
4315 | const Value *OrigArg, | ||||
4316 | unsigned InRegsParamRecordIdx, | ||||
4317 | int ArgOffset, unsigned ArgSize) const { | ||||
4318 | // Currently, two use-cases possible: | ||||
4319 | // Case #1. Non-var-args function, and we meet first byval parameter. | ||||
4320 | // Setup first unallocated register as first byval register; | ||||
4321 | // eat all remained registers | ||||
4322 | // (these two actions are performed by HandleByVal method). | ||||
4323 | // Then, here, we initialize stack frame with | ||||
4324 | // "store-reg" instructions. | ||||
4325 | // Case #2. Var-args function, that doesn't contain byval parameters. | ||||
4326 | // The same: eat all remained unallocated registers, | ||||
4327 | // initialize stack frame. | ||||
4328 | |||||
4329 | MachineFunction &MF = DAG.getMachineFunction(); | ||||
4330 | MachineFrameInfo &MFI = MF.getFrameInfo(); | ||||
4331 | ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>(); | ||||
4332 | unsigned RBegin, REnd; | ||||
4333 | if (InRegsParamRecordIdx < CCInfo.getInRegsParamsCount()) { | ||||
4334 | CCInfo.getInRegsParamInfo(InRegsParamRecordIdx, RBegin, REnd); | ||||
4335 | } else { | ||||
4336 | unsigned RBeginIdx = CCInfo.getFirstUnallocated(GPRArgRegs); | ||||
4337 | RBegin = RBeginIdx == 4 ? (unsigned)ARM::R4 : GPRArgRegs[RBeginIdx]; | ||||
4338 | REnd = ARM::R4; | ||||
4339 | } | ||||
4340 | |||||
4341 | if (REnd != RBegin) | ||||
4342 | ArgOffset = -4 * (ARM::R4 - RBegin); | ||||
4343 | |||||
4344 | auto PtrVT = getPointerTy(DAG.getDataLayout()); | ||||
4345 | int FrameIndex = MFI.CreateFixedObject(ArgSize, ArgOffset, false); | ||||
4346 | SDValue FIN = DAG.getFrameIndex(FrameIndex, PtrVT); | ||||
4347 | |||||
4348 | SmallVector<SDValue, 4> MemOps; | ||||
4349 | const TargetRegisterClass *RC = | ||||
4350 | AFI->isThumb1OnlyFunction() ? &ARM::tGPRRegClass : &ARM::GPRRegClass; | ||||
4351 | |||||
4352 | for (unsigned Reg = RBegin, i = 0; Reg < REnd; ++Reg, ++i) { | ||||
4353 | Register VReg = MF.addLiveIn(Reg, RC); | ||||
4354 | SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i32); | ||||
4355 | SDValue Store = DAG.getStore(Val.getValue(1), dl, Val, FIN, | ||||
4356 | MachinePointerInfo(OrigArg, 4 * i)); | ||||
4357 | MemOps.push_back(Store); | ||||
4358 | FIN = DAG.getNode(ISD::ADD, dl, PtrVT, FIN, DAG.getConstant(4, dl, PtrVT)); | ||||
4359 | } | ||||
4360 | |||||
4361 | if (!MemOps.empty()) | ||||
4362 | Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOps); | ||||
4363 | return FrameIndex; | ||||
4364 | } | ||||
4365 | |||||
4366 | // Setup stack frame, the va_list pointer will start from. | ||||
4367 | void ARMTargetLowering::VarArgStyleRegisters(CCState &CCInfo, SelectionDAG &DAG, | ||||
4368 | const SDLoc &dl, SDValue &Chain, | ||||
4369 | unsigned ArgOffset, | ||||
4370 | unsigned TotalArgRegsSaveSize, | ||||
4371 | bool ForceMutable) const { | ||||
4372 | MachineFunction &MF = DAG.getMachineFunction(); | ||||
4373 | ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>(); | ||||
4374 | |||||
4375 | // Try to store any remaining integer argument regs | ||||
4376 | // to their spots on the stack so that they may be loaded by dereferencing | ||||
4377 | // the result of va_next. | ||||
4378 | // If there is no regs to be stored, just point address after last | ||||
4379 | // argument passed via stack. | ||||
4380 | int FrameIndex = StoreByValRegs(CCInfo, DAG, dl, Chain, nullptr, | ||||
4381 | CCInfo.getInRegsParamsCount(), | ||||
4382 | CCInfo.getNextStackOffset(), | ||||
4383 | std::max(4U, TotalArgRegsSaveSize)); | ||||
4384 | AFI->setVarArgsFrameIndex(FrameIndex); | ||||
4385 | } | ||||
4386 | |||||
4387 | bool ARMTargetLowering::splitValueIntoRegisterParts( | ||||
4388 | SelectionDAG &DAG, const SDLoc &DL, SDValue Val, SDValue *Parts, | ||||
4389 | unsigned NumParts, MVT PartVT, Optional<CallingConv::ID> CC) const { | ||||
4390 | bool IsABIRegCopy = CC.hasValue(); | ||||
4391 | EVT ValueVT = Val.getValueType(); | ||||
4392 | if (IsABIRegCopy && (ValueVT == MVT::f16 || ValueVT == MVT::bf16) && | ||||
4393 | PartVT == MVT::f32) { | ||||
4394 | unsigned ValueBits = ValueVT.getSizeInBits(); | ||||
4395 | unsigned PartBits = PartVT.getSizeInBits(); | ||||
4396 | Val = DAG.getNode(ISD::BITCAST, DL, MVT::getIntegerVT(ValueBits), Val); | ||||
4397 | Val = DAG.getNode(ISD::ANY_EXTEND, DL, MVT::getIntegerVT(PartBits), Val); | ||||
4398 | Val = DAG.getNode(ISD::BITCAST, DL, PartVT, Val); | ||||
4399 | Parts[0] = Val; | ||||
4400 | return true; | ||||
4401 | } | ||||
4402 | return false; | ||||
4403 | } | ||||
4404 | |||||
4405 | SDValue ARMTargetLowering::joinRegisterPartsIntoValue( | ||||
4406 | SelectionDAG &DAG, const SDLoc &DL, const SDValue *Parts, unsigned NumParts, | ||||
4407 | MVT PartVT, EVT ValueVT, Optional<CallingConv::ID> CC) const { | ||||
4408 | bool IsABIRegCopy = CC.hasValue(); | ||||
4409 | if (IsABIRegCopy && (ValueVT == MVT::f16 || ValueVT == MVT::bf16) && | ||||
4410 | PartVT == MVT::f32) { | ||||
4411 | unsigned ValueBits = ValueVT.getSizeInBits(); | ||||
4412 | unsigned PartBits = PartVT.getSizeInBits(); | ||||
4413 | SDValue Val = Parts[0]; | ||||
4414 | |||||
4415 | Val = DAG.getNode(ISD::BITCAST, DL, MVT::getIntegerVT(PartBits), Val); | ||||
4416 | Val = DAG.getNode(ISD::TRUNCATE, DL, MVT::getIntegerVT(ValueBits), Val); | ||||
4417 | Val = DAG.getNode(ISD::BITCAST, DL, ValueVT, Val); | ||||
4418 | return Val; | ||||
4419 | } | ||||
4420 | return SDValue(); | ||||
4421 | } | ||||
4422 | |||||
4423 | SDValue ARMTargetLowering::LowerFormalArguments( | ||||
4424 | SDValue Chain, CallingConv::ID CallConv, bool isVarArg, | ||||
4425 | const SmallVectorImpl<ISD::InputArg> &Ins, const SDLoc &dl, | ||||
4426 | SelectionDAG &DAG, SmallVectorImpl<SDValue> &InVals) const { | ||||
4427 | MachineFunction &MF = DAG.getMachineFunction(); | ||||
4428 | MachineFrameInfo &MFI = MF.getFrameInfo(); | ||||
4429 | |||||
4430 | ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>(); | ||||
4431 | |||||
4432 | // Assign locations to all of the incoming arguments. | ||||
4433 | SmallVector<CCValAssign, 16> ArgLocs; | ||||
4434 | CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(), ArgLocs, | ||||
4435 | *DAG.getContext()); | ||||
4436 | CCInfo.AnalyzeFormalArguments(Ins, CCAssignFnForCall(CallConv, isVarArg)); | ||||
4437 | |||||
4438 | SmallVector<SDValue, 16> ArgValues; | ||||
4439 | SDValue ArgValue; | ||||
4440 | Function::const_arg_iterator CurOrigArg = MF.getFunction().arg_begin(); | ||||
4441 | unsigned CurArgIdx = 0; | ||||
4442 | |||||
4443 | // Initially ArgRegsSaveSize is zero. | ||||
4444 | // Then we increase this value each time we meet byval parameter. | ||||
4445 | // We also increase this value in case of varargs function. | ||||
4446 | AFI->setArgRegsSaveSize(0); | ||||
4447 | |||||
4448 | // Calculate the amount of stack space that we need to allocate to store | ||||
4449 | // byval and variadic arguments that are passed in registers. | ||||
4450 | // We need to know this before we allocate the first byval or variadic | ||||
4451 | // argument, as they will be allocated a stack slot below the CFA (Canonical | ||||
4452 | // Frame Address, the stack pointer at entry to the function). | ||||
4453 | unsigned ArgRegBegin = ARM::R4; | ||||
4454 | for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) { | ||||
4455 | if (CCInfo.getInRegsParamsProcessed() >= CCInfo.getInRegsParamsCount()) | ||||
4456 | break; | ||||
4457 | |||||
4458 | CCValAssign &VA = ArgLocs[i]; | ||||
4459 | unsigned Index = VA.getValNo(); | ||||
4460 | ISD::ArgFlagsTy Flags = Ins[Index].Flags; | ||||
4461 | if (!Flags.isByVal()) | ||||
4462 | continue; | ||||
4463 | |||||
4464 | assert(VA.isMemLoc() && "unexpected byval pointer in reg")(static_cast <bool> (VA.isMemLoc() && "unexpected byval pointer in reg" ) ? void (0) : __assert_fail ("VA.isMemLoc() && \"unexpected byval pointer in reg\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 4464, __extension__ __PRETTY_FUNCTION__)); | ||||
4465 | unsigned RBegin, REnd; | ||||
4466 | CCInfo.getInRegsParamInfo(CCInfo.getInRegsParamsProcessed(), RBegin, REnd); | ||||
4467 | ArgRegBegin = std::min(ArgRegBegin, RBegin); | ||||
4468 | |||||
4469 | CCInfo.nextInRegsParam(); | ||||
4470 | } | ||||
4471 | CCInfo.rewindByValRegsInfo(); | ||||
4472 | |||||
4473 | int lastInsIndex = -1; | ||||
4474 | if (isVarArg && MFI.hasVAStart()) { | ||||
4475 | unsigned RegIdx = CCInfo.getFirstUnallocated(GPRArgRegs); | ||||
4476 | if (RegIdx != array_lengthof(GPRArgRegs)) | ||||
4477 | ArgRegBegin = std::min(ArgRegBegin, (unsigned)GPRArgRegs[RegIdx]); | ||||
4478 | } | ||||
4479 | |||||
4480 | unsigned TotalArgRegsSaveSize = 4 * (ARM::R4 - ArgRegBegin); | ||||
4481 | AFI->setArgRegsSaveSize(TotalArgRegsSaveSize); | ||||
4482 | auto PtrVT = getPointerTy(DAG.getDataLayout()); | ||||
4483 | |||||
4484 | for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) { | ||||
4485 | CCValAssign &VA = ArgLocs[i]; | ||||
4486 | if (Ins[VA.getValNo()].isOrigArg()) { | ||||
4487 | std::advance(CurOrigArg, | ||||
4488 | Ins[VA.getValNo()].getOrigArgIndex() - CurArgIdx); | ||||
4489 | CurArgIdx = Ins[VA.getValNo()].getOrigArgIndex(); | ||||
4490 | } | ||||
4491 | // Arguments stored in registers. | ||||
4492 | if (VA.isRegLoc()) { | ||||
4493 | EVT RegVT = VA.getLocVT(); | ||||
4494 | |||||
4495 | if (VA.needsCustom() && VA.getLocVT() == MVT::v2f64) { | ||||
4496 | // f64 and vector types are split up into multiple registers or | ||||
4497 | // combinations of registers and stack slots. | ||||
4498 | SDValue ArgValue1 = | ||||
4499 | GetF64FormalArgument(VA, ArgLocs[++i], Chain, DAG, dl); | ||||
4500 | VA = ArgLocs[++i]; // skip ahead to next loc | ||||
4501 | SDValue ArgValue2; | ||||
4502 | if (VA.isMemLoc()) { | ||||
4503 | int FI = MFI.CreateFixedObject(8, VA.getLocMemOffset(), true); | ||||
4504 | SDValue FIN = DAG.getFrameIndex(FI, PtrVT); | ||||
4505 | ArgValue2 = DAG.getLoad( | ||||
4506 | MVT::f64, dl, Chain, FIN, | ||||
4507 | MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), FI)); | ||||
4508 | } else { | ||||
4509 | ArgValue2 = GetF64FormalArgument(VA, ArgLocs[++i], Chain, DAG, dl); | ||||
4510 | } | ||||
4511 | ArgValue = DAG.getNode(ISD::UNDEF, dl, MVT::v2f64); | ||||
4512 | ArgValue = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, ArgValue, | ||||
4513 | ArgValue1, DAG.getIntPtrConstant(0, dl)); | ||||
4514 | ArgValue = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, ArgValue, | ||||
4515 | ArgValue2, DAG.getIntPtrConstant(1, dl)); | ||||
4516 | } else if (VA.needsCustom() && VA.getLocVT() == MVT::f64) { | ||||
4517 | ArgValue = GetF64FormalArgument(VA, ArgLocs[++i], Chain, DAG, dl); | ||||
4518 | } else { | ||||
4519 | const TargetRegisterClass *RC; | ||||
4520 | |||||
4521 | if (RegVT == MVT::f16 || RegVT == MVT::bf16) | ||||
4522 | RC = &ARM::HPRRegClass; | ||||
4523 | else if (RegVT == MVT::f32) | ||||
4524 | RC = &ARM::SPRRegClass; | ||||
4525 | else if (RegVT == MVT::f64 || RegVT == MVT::v4f16 || | ||||
4526 | RegVT == MVT::v4bf16) | ||||
4527 | RC = &ARM::DPRRegClass; | ||||
4528 | else if (RegVT == MVT::v2f64 || RegVT == MVT::v8f16 || | ||||
4529 | RegVT == MVT::v8bf16) | ||||
4530 | RC = &ARM::QPRRegClass; | ||||
4531 | else if (RegVT == MVT::i32) | ||||
4532 | RC = AFI->isThumb1OnlyFunction() ? &ARM::tGPRRegClass | ||||
4533 | : &ARM::GPRRegClass; | ||||
4534 | else | ||||
4535 | llvm_unreachable("RegVT not supported by FORMAL_ARGUMENTS Lowering")::llvm::llvm_unreachable_internal("RegVT not supported by FORMAL_ARGUMENTS Lowering" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 4535); | ||||
4536 | |||||
4537 | // Transform the arguments in physical registers into virtual ones. | ||||
4538 | Register Reg = MF.addLiveIn(VA.getLocReg(), RC); | ||||
4539 | ArgValue = DAG.getCopyFromReg(Chain, dl, Reg, RegVT); | ||||
4540 | |||||
4541 | // If this value is passed in r0 and has the returned attribute (e.g. | ||||
4542 | // C++ 'structors), record this fact for later use. | ||||
4543 | if (VA.getLocReg() == ARM::R0 && Ins[VA.getValNo()].Flags.isReturned()) { | ||||
4544 | AFI->setPreservesR0(); | ||||
4545 | } | ||||
4546 | } | ||||
4547 | |||||
4548 | // If this is an 8 or 16-bit value, it is really passed promoted | ||||
4549 | // to 32 bits. Insert an assert[sz]ext to capture this, then | ||||
4550 | // truncate to the right size. | ||||
4551 | switch (VA.getLocInfo()) { | ||||
4552 | default: llvm_unreachable("Unknown loc info!")::llvm::llvm_unreachable_internal("Unknown loc info!", "llvm/lib/Target/ARM/ARMISelLowering.cpp" , 4552); | ||||
4553 | case CCValAssign::Full: break; | ||||
4554 | case CCValAssign::BCvt: | ||||
4555 | ArgValue = DAG.getNode(ISD::BITCAST, dl, VA.getValVT(), ArgValue); | ||||
4556 | break; | ||||
4557 | case CCValAssign::SExt: | ||||
4558 | ArgValue = DAG.getNode(ISD::AssertSext, dl, RegVT, ArgValue, | ||||
4559 | DAG.getValueType(VA.getValVT())); | ||||
4560 | ArgValue = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), ArgValue); | ||||
4561 | break; | ||||
4562 | case CCValAssign::ZExt: | ||||
4563 | ArgValue = DAG.getNode(ISD::AssertZext, dl, RegVT, ArgValue, | ||||
4564 | DAG.getValueType(VA.getValVT())); | ||||
4565 | ArgValue = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), ArgValue); | ||||
4566 | break; | ||||
4567 | } | ||||
4568 | |||||
4569 | // f16 arguments have their size extended to 4 bytes and passed as if they | ||||
4570 | // had been copied to the LSBs of a 32-bit register. | ||||
4571 | // For that, it's passed extended to i32 (soft ABI) or to f32 (hard ABI) | ||||
4572 | if (VA.needsCustom() && | ||||
4573 | (VA.getValVT() == MVT::f16 || VA.getValVT() == MVT::bf16)) | ||||
4574 | ArgValue = MoveToHPR(dl, DAG, VA.getLocVT(), VA.getValVT(), ArgValue); | ||||
4575 | |||||
4576 | InVals.push_back(ArgValue); | ||||
4577 | } else { // VA.isRegLoc() | ||||
4578 | // Only arguments passed on the stack should make it here. | ||||
4579 | assert(VA.isMemLoc())(static_cast <bool> (VA.isMemLoc()) ? void (0) : __assert_fail ("VA.isMemLoc()", "llvm/lib/Target/ARM/ARMISelLowering.cpp", 4579, __extension__ __PRETTY_FUNCTION__)); | ||||
4580 | assert(VA.getValVT() != MVT::i64 && "i64 should already be lowered")(static_cast <bool> (VA.getValVT() != MVT::i64 && "i64 should already be lowered") ? void (0) : __assert_fail ( "VA.getValVT() != MVT::i64 && \"i64 should already be lowered\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 4580, __extension__ __PRETTY_FUNCTION__)); | ||||
4581 | |||||
4582 | int index = VA.getValNo(); | ||||
4583 | |||||
4584 | // Some Ins[] entries become multiple ArgLoc[] entries. | ||||
4585 | // Process them only once. | ||||
4586 | if (index != lastInsIndex) | ||||
4587 | { | ||||
4588 | ISD::ArgFlagsTy Flags = Ins[index].Flags; | ||||
4589 | // FIXME: For now, all byval parameter objects are marked mutable. | ||||
4590 | // This can be changed with more analysis. | ||||
4591 | // In case of tail call optimization mark all arguments mutable. | ||||
4592 | // Since they could be overwritten by lowering of arguments in case of | ||||
4593 | // a tail call. | ||||
4594 | if (Flags.isByVal()) { | ||||
4595 | assert(Ins[index].isOrigArg() &&(static_cast <bool> (Ins[index].isOrigArg() && "Byval arguments cannot be implicit" ) ? void (0) : __assert_fail ("Ins[index].isOrigArg() && \"Byval arguments cannot be implicit\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 4596, __extension__ __PRETTY_FUNCTION__)) | ||||
4596 | "Byval arguments cannot be implicit")(static_cast <bool> (Ins[index].isOrigArg() && "Byval arguments cannot be implicit" ) ? void (0) : __assert_fail ("Ins[index].isOrigArg() && \"Byval arguments cannot be implicit\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 4596, __extension__ __PRETTY_FUNCTION__)); | ||||
4597 | unsigned CurByValIndex = CCInfo.getInRegsParamsProcessed(); | ||||
4598 | |||||
4599 | int FrameIndex = StoreByValRegs( | ||||
4600 | CCInfo, DAG, dl, Chain, &*CurOrigArg, CurByValIndex, | ||||
4601 | VA.getLocMemOffset(), Flags.getByValSize()); | ||||
4602 | InVals.push_back(DAG.getFrameIndex(FrameIndex, PtrVT)); | ||||
4603 | CCInfo.nextInRegsParam(); | ||||
4604 | } else { | ||||
4605 | unsigned FIOffset = VA.getLocMemOffset(); | ||||
4606 | int FI = MFI.CreateFixedObject(VA.getLocVT().getSizeInBits()/8, | ||||
4607 | FIOffset, true); | ||||
4608 | |||||
4609 | // Create load nodes to retrieve arguments from the stack. | ||||
4610 | SDValue FIN = DAG.getFrameIndex(FI, PtrVT); | ||||
4611 | InVals.push_back(DAG.getLoad(VA.getValVT(), dl, Chain, FIN, | ||||
4612 | MachinePointerInfo::getFixedStack( | ||||
4613 | DAG.getMachineFunction(), FI))); | ||||
4614 | } | ||||
4615 | lastInsIndex = index; | ||||
4616 | } | ||||
4617 | } | ||||
4618 | } | ||||
4619 | |||||
4620 | // varargs | ||||
4621 | if (isVarArg && MFI.hasVAStart()) { | ||||
4622 | VarArgStyleRegisters(CCInfo, DAG, dl, Chain, CCInfo.getNextStackOffset(), | ||||
4623 | TotalArgRegsSaveSize); | ||||
4624 | if (AFI->isCmseNSEntryFunction()) { | ||||
4625 | DiagnosticInfoUnsupported Diag( | ||||
4626 | DAG.getMachineFunction().getFunction(), | ||||
4627 | "secure entry function must not be variadic", dl.getDebugLoc()); | ||||
4628 | DAG.getContext()->diagnose(Diag); | ||||
4629 | } | ||||
4630 | } | ||||
4631 | |||||
4632 | unsigned StackArgSize = CCInfo.getNextStackOffset(); | ||||
4633 | bool TailCallOpt = MF.getTarget().Options.GuaranteedTailCallOpt; | ||||
4634 | if (canGuaranteeTCO(CallConv, TailCallOpt)) { | ||||
4635 | // The only way to guarantee a tail call is if the callee restores its | ||||
4636 | // argument area, but it must also keep the stack aligned when doing so. | ||||
4637 | const DataLayout &DL = DAG.getDataLayout(); | ||||
4638 | StackArgSize = alignTo(StackArgSize, DL.getStackAlignment()); | ||||
4639 | |||||
4640 | AFI->setArgumentStackToRestore(StackArgSize); | ||||
4641 | } | ||||
4642 | AFI->setArgumentStackSize(StackArgSize); | ||||
4643 | |||||
4644 | if (CCInfo.getNextStackOffset() > 0 && AFI->isCmseNSEntryFunction()) { | ||||
4645 | DiagnosticInfoUnsupported Diag( | ||||
4646 | DAG.getMachineFunction().getFunction(), | ||||
4647 | "secure entry function requires arguments on stack", dl.getDebugLoc()); | ||||
4648 | DAG.getContext()->diagnose(Diag); | ||||
4649 | } | ||||
4650 | |||||
4651 | return Chain; | ||||
4652 | } | ||||
4653 | |||||
4654 | /// isFloatingPointZero - Return true if this is +0.0. | ||||
4655 | static bool isFloatingPointZero(SDValue Op) { | ||||
4656 | if (ConstantFPSDNode *CFP = dyn_cast<ConstantFPSDNode>(Op)) | ||||
4657 | return CFP->getValueAPF().isPosZero(); | ||||
4658 | else if (ISD::isEXTLoad(Op.getNode()) || ISD::isNON_EXTLoad(Op.getNode())) { | ||||
4659 | // Maybe this has already been legalized into the constant pool? | ||||
4660 | if (Op.getOperand(1).getOpcode() == ARMISD::Wrapper) { | ||||
4661 | SDValue WrapperOp = Op.getOperand(1).getOperand(0); | ||||
4662 | if (ConstantPoolSDNode *CP = dyn_cast<ConstantPoolSDNode>(WrapperOp)) | ||||
4663 | if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CP->getConstVal())) | ||||
4664 | return CFP->getValueAPF().isPosZero(); | ||||
4665 | } | ||||
4666 | } else if (Op->getOpcode() == ISD::BITCAST && | ||||
4667 | Op->getValueType(0) == MVT::f64) { | ||||
4668 | // Handle (ISD::BITCAST (ARMISD::VMOVIMM (ISD::TargetConstant 0)) MVT::f64) | ||||
4669 | // created by LowerConstantFP(). | ||||
4670 | SDValue BitcastOp = Op->getOperand(0); | ||||
4671 | if (BitcastOp->getOpcode() == ARMISD::VMOVIMM && | ||||
4672 | isNullConstant(BitcastOp->getOperand(0))) | ||||
4673 | return true; | ||||
4674 | } | ||||
4675 | return false; | ||||
4676 | } | ||||
4677 | |||||
4678 | /// Returns appropriate ARM CMP (cmp) and corresponding condition code for | ||||
4679 | /// the given operands. | ||||
4680 | SDValue ARMTargetLowering::getARMCmp(SDValue LHS, SDValue RHS, ISD::CondCode CC, | ||||
4681 | SDValue &ARMcc, SelectionDAG &DAG, | ||||
4682 | const SDLoc &dl) const { | ||||
4683 | if (ConstantSDNode *RHSC = dyn_cast<ConstantSDNode>(RHS.getNode())) { | ||||
4684 | unsigned C = RHSC->getZExtValue(); | ||||
4685 | if (!isLegalICmpImmediate((int32_t)C)) { | ||||
4686 | // Constant does not fit, try adjusting it by one. | ||||
4687 | switch (CC) { | ||||
4688 | default: break; | ||||
4689 | case ISD::SETLT: | ||||
4690 | case ISD::SETGE: | ||||
4691 | if (C != 0x80000000 && isLegalICmpImmediate(C-1)) { | ||||
4692 | CC = (CC == ISD::SETLT) ? ISD::SETLE : ISD::SETGT; | ||||
4693 | RHS = DAG.getConstant(C - 1, dl, MVT::i32); | ||||
4694 | } | ||||
4695 | break; | ||||
4696 | case ISD::SETULT: | ||||
4697 | case ISD::SETUGE: | ||||
4698 | if (C != 0 && isLegalICmpImmediate(C-1)) { | ||||
4699 | CC = (CC == ISD::SETULT) ? ISD::SETULE : ISD::SETUGT; | ||||
4700 | RHS = DAG.getConstant(C - 1, dl, MVT::i32); | ||||
4701 | } | ||||
4702 | break; | ||||
4703 | case ISD::SETLE: | ||||
4704 | case ISD::SETGT: | ||||
4705 | if (C != 0x7fffffff && isLegalICmpImmediate(C+1)) { | ||||
4706 | CC = (CC == ISD::SETLE) ? ISD::SETLT : ISD::SETGE; | ||||
4707 | RHS = DAG.getConstant(C + 1, dl, MVT::i32); | ||||
4708 | } | ||||
4709 | break; | ||||
4710 | case ISD::SETULE: | ||||
4711 | case ISD::SETUGT: | ||||
4712 | if (C != 0xffffffff && isLegalICmpImmediate(C+1)) { | ||||
4713 | CC = (CC == ISD::SETULE) ? ISD::SETULT : ISD::SETUGE; | ||||
4714 | RHS = DAG.getConstant(C + 1, dl, MVT::i32); | ||||
4715 | } | ||||
4716 | break; | ||||
4717 | } | ||||
4718 | } | ||||
4719 | } else if ((ARM_AM::getShiftOpcForNode(LHS.getOpcode()) != ARM_AM::no_shift) && | ||||
4720 | (ARM_AM::getShiftOpcForNode(RHS.getOpcode()) == ARM_AM::no_shift)) { | ||||
4721 | // In ARM and Thumb-2, the compare instructions can shift their second | ||||
4722 | // operand. | ||||
4723 | CC = ISD::getSetCCSwappedOperands(CC); | ||||
4724 | std::swap(LHS, RHS); | ||||
4725 | } | ||||
4726 | |||||
4727 | // Thumb1 has very limited immediate modes, so turning an "and" into a | ||||
4728 | // shift can save multiple instructions. | ||||
4729 | // | ||||
4730 | // If we have (x & C1), and C1 is an appropriate mask, we can transform it | ||||
4731 | // into "((x << n) >> n)". But that isn't necessarily profitable on its | ||||
4732 | // own. If it's the operand to an unsigned comparison with an immediate, | ||||
4733 | // we can eliminate one of the shifts: we transform | ||||
4734 | // "((x << n) >> n) == C2" to "(x << n) == (C2 << n)". | ||||
4735 | // | ||||
4736 | // We avoid transforming cases which aren't profitable due to encoding | ||||
4737 | // details: | ||||
4738 | // | ||||
4739 | // 1. C2 fits into the immediate field of a cmp, and the transformed version | ||||
4740 | // would not; in that case, we're essentially trading one immediate load for | ||||
4741 | // another. | ||||
4742 | // 2. C1 is 255 or 65535, so we can use uxtb or uxth. | ||||
4743 | // 3. C2 is zero; we have other code for this special case. | ||||
4744 | // | ||||
4745 | // FIXME: Figure out profitability for Thumb2; we usually can't save an | ||||
4746 | // instruction, since the AND is always one instruction anyway, but we could | ||||
4747 | // use narrow instructions in some cases. | ||||
4748 | if (Subtarget->isThumb1Only() && LHS->getOpcode() == ISD::AND && | ||||
4749 | LHS->hasOneUse() && isa<ConstantSDNode>(LHS.getOperand(1)) && | ||||
4750 | LHS.getValueType() == MVT::i32 && isa<ConstantSDNode>(RHS) && | ||||
4751 | !isSignedIntSetCC(CC)) { | ||||
4752 | unsigned Mask = cast<ConstantSDNode>(LHS.getOperand(1))->getZExtValue(); | ||||
4753 | auto *RHSC = cast<ConstantSDNode>(RHS.getNode()); | ||||
4754 | uint64_t RHSV = RHSC->getZExtValue(); | ||||
4755 | if (isMask_32(Mask) && (RHSV & ~Mask) == 0 && Mask != 255 && Mask != 65535) { | ||||
4756 | unsigned ShiftBits = countLeadingZeros(Mask); | ||||
4757 | if (RHSV && (RHSV > 255 || (RHSV << ShiftBits) <= 255)) { | ||||
4758 | SDValue ShiftAmt = DAG.getConstant(ShiftBits, dl, MVT::i32); | ||||
4759 | LHS = DAG.getNode(ISD::SHL, dl, MVT::i32, LHS.getOperand(0), ShiftAmt); | ||||
4760 | RHS = DAG.getConstant(RHSV << ShiftBits, dl, MVT::i32); | ||||
4761 | } | ||||
4762 | } | ||||
4763 | } | ||||
4764 | |||||
4765 | // The specific comparison "(x<<c) > 0x80000000U" can be optimized to a | ||||
4766 | // single "lsls x, c+1". The shift sets the "C" and "Z" flags the same | ||||
4767 | // way a cmp would. | ||||
4768 | // FIXME: Add support for ARM/Thumb2; this would need isel patterns, and | ||||
4769 | // some tweaks to the heuristics for the previous and->shift transform. | ||||
4770 | // FIXME: Optimize cases where the LHS isn't a shift. | ||||
4771 | if (Subtarget->isThumb1Only() && LHS->getOpcode() == ISD::SHL && | ||||
4772 | isa<ConstantSDNode>(RHS) && | ||||
4773 | cast<ConstantSDNode>(RHS)->getZExtValue() == 0x80000000U && | ||||
4774 | CC == ISD::SETUGT && isa<ConstantSDNode>(LHS.getOperand(1)) && | ||||
4775 | cast<ConstantSDNode>(LHS.getOperand(1))->getZExtValue() < 31) { | ||||
4776 | unsigned ShiftAmt = | ||||
4777 | cast<ConstantSDNode>(LHS.getOperand(1))->getZExtValue() + 1; | ||||
4778 | SDValue Shift = DAG.getNode(ARMISD::LSLS, dl, | ||||
4779 | DAG.getVTList(MVT::i32, MVT::i32), | ||||
4780 | LHS.getOperand(0), | ||||
4781 | DAG.getConstant(ShiftAmt, dl, MVT::i32)); | ||||
4782 | SDValue Chain = DAG.getCopyToReg(DAG.getEntryNode(), dl, ARM::CPSR, | ||||
4783 | Shift.getValue(1), SDValue()); | ||||
4784 | ARMcc = DAG.getConstant(ARMCC::HI, dl, MVT::i32); | ||||
4785 | return Chain.getValue(1); | ||||
4786 | } | ||||
4787 | |||||
4788 | ARMCC::CondCodes CondCode = IntCCToARMCC(CC); | ||||
4789 | |||||
4790 | // If the RHS is a constant zero then the V (overflow) flag will never be | ||||
4791 | // set. This can allow us to simplify GE to PL or LT to MI, which can be | ||||
4792 | // simpler for other passes (like the peephole optimiser) to deal with. | ||||
4793 | if (isNullConstant(RHS)) { | ||||
4794 | switch (CondCode) { | ||||
4795 | default: break; | ||||
4796 | case ARMCC::GE: | ||||
4797 | CondCode = ARMCC::PL; | ||||
4798 | break; | ||||
4799 | case ARMCC::LT: | ||||
4800 | CondCode = ARMCC::MI; | ||||
4801 | break; | ||||
4802 | } | ||||
4803 | } | ||||
4804 | |||||
4805 | ARMISD::NodeType CompareType; | ||||
4806 | switch (CondCode) { | ||||
4807 | default: | ||||
4808 | CompareType = ARMISD::CMP; | ||||
4809 | break; | ||||
4810 | case ARMCC::EQ: | ||||
4811 | case ARMCC::NE: | ||||
4812 | // Uses only Z Flag | ||||
4813 | CompareType = ARMISD::CMPZ; | ||||
4814 | break; | ||||
4815 | } | ||||
4816 | ARMcc = DAG.getConstant(CondCode, dl, MVT::i32); | ||||
4817 | return DAG.getNode(CompareType, dl, MVT::Glue, LHS, RHS); | ||||
4818 | } | ||||
4819 | |||||
4820 | /// Returns a appropriate VFP CMP (fcmp{s|d}+fmstat) for the given operands. | ||||
4821 | SDValue ARMTargetLowering::getVFPCmp(SDValue LHS, SDValue RHS, | ||||
4822 | SelectionDAG &DAG, const SDLoc &dl, | ||||
4823 | bool Signaling) const { | ||||
4824 | assert(Subtarget->hasFP64() || RHS.getValueType() != MVT::f64)(static_cast <bool> (Subtarget->hasFP64() || RHS.getValueType () != MVT::f64) ? void (0) : __assert_fail ("Subtarget->hasFP64() || RHS.getValueType() != MVT::f64" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 4824, __extension__ __PRETTY_FUNCTION__)); | ||||
4825 | SDValue Cmp; | ||||
4826 | if (!isFloatingPointZero(RHS)) | ||||
4827 | Cmp = DAG.getNode(Signaling ? ARMISD::CMPFPE : ARMISD::CMPFP, | ||||
4828 | dl, MVT::Glue, LHS, RHS); | ||||
4829 | else | ||||
4830 | Cmp = DAG.getNode(Signaling ? ARMISD::CMPFPEw0 : ARMISD::CMPFPw0, | ||||
4831 | dl, MVT::Glue, LHS); | ||||
4832 | return DAG.getNode(ARMISD::FMSTAT, dl, MVT::Glue, Cmp); | ||||
4833 | } | ||||
4834 | |||||
4835 | /// duplicateCmp - Glue values can have only one use, so this function | ||||
4836 | /// duplicates a comparison node. | ||||
4837 | SDValue | ||||
4838 | ARMTargetLowering::duplicateCmp(SDValue Cmp, SelectionDAG &DAG) const { | ||||
4839 | unsigned Opc = Cmp.getOpcode(); | ||||
4840 | SDLoc DL(Cmp); | ||||
4841 | if (Opc == ARMISD::CMP || Opc == ARMISD::CMPZ) | ||||
4842 | return DAG.getNode(Opc, DL, MVT::Glue, Cmp.getOperand(0),Cmp.getOperand(1)); | ||||
4843 | |||||
4844 | assert(Opc == ARMISD::FMSTAT && "unexpected comparison operation")(static_cast <bool> (Opc == ARMISD::FMSTAT && "unexpected comparison operation" ) ? void (0) : __assert_fail ("Opc == ARMISD::FMSTAT && \"unexpected comparison operation\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 4844, __extension__ __PRETTY_FUNCTION__)); | ||||
4845 | Cmp = Cmp.getOperand(0); | ||||
4846 | Opc = Cmp.getOpcode(); | ||||
4847 | if (Opc == ARMISD::CMPFP) | ||||
4848 | Cmp = DAG.getNode(Opc, DL, MVT::Glue, Cmp.getOperand(0),Cmp.getOperand(1)); | ||||
4849 | else { | ||||
4850 | assert(Opc == ARMISD::CMPFPw0 && "unexpected operand of FMSTAT")(static_cast <bool> (Opc == ARMISD::CMPFPw0 && "unexpected operand of FMSTAT" ) ? void (0) : __assert_fail ("Opc == ARMISD::CMPFPw0 && \"unexpected operand of FMSTAT\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 4850, __extension__ __PRETTY_FUNCTION__)); | ||||
4851 | Cmp = DAG.getNode(Opc, DL, MVT::Glue, Cmp.getOperand(0)); | ||||
4852 | } | ||||
4853 | return DAG.getNode(ARMISD::FMSTAT, DL, MVT::Glue, Cmp); | ||||
4854 | } | ||||
4855 | |||||
4856 | // This function returns three things: the arithmetic computation itself | ||||
4857 | // (Value), a comparison (OverflowCmp), and a condition code (ARMcc). The | ||||
4858 | // comparison and the condition code define the case in which the arithmetic | ||||
4859 | // computation *does not* overflow. | ||||
4860 | std::pair<SDValue, SDValue> | ||||
4861 | ARMTargetLowering::getARMXALUOOp(SDValue Op, SelectionDAG &DAG, | ||||
4862 | SDValue &ARMcc) const { | ||||
4863 | assert(Op.getValueType() == MVT::i32 && "Unsupported value type")(static_cast <bool> (Op.getValueType() == MVT::i32 && "Unsupported value type") ? void (0) : __assert_fail ("Op.getValueType() == MVT::i32 && \"Unsupported value type\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 4863, __extension__ __PRETTY_FUNCTION__)); | ||||
4864 | |||||
4865 | SDValue Value, OverflowCmp; | ||||
4866 | SDValue LHS = Op.getOperand(0); | ||||
4867 | SDValue RHS = Op.getOperand(1); | ||||
4868 | SDLoc dl(Op); | ||||
4869 | |||||
4870 | // FIXME: We are currently always generating CMPs because we don't support | ||||
4871 | // generating CMN through the backend. This is not as good as the natural | ||||
4872 | // CMP case because it causes a register dependency and cannot be folded | ||||
4873 | // later. | ||||
4874 | |||||
4875 | switch (Op.getOpcode()) { | ||||
4876 | default: | ||||
4877 | llvm_unreachable("Unknown overflow instruction!")::llvm::llvm_unreachable_internal("Unknown overflow instruction!" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 4877); | ||||
4878 | case ISD::SADDO: | ||||
4879 | ARMcc = DAG.getConstant(ARMCC::VC, dl, MVT::i32); | ||||
4880 | Value = DAG.getNode(ISD::ADD, dl, Op.getValueType(), LHS, RHS); | ||||
4881 | OverflowCmp = DAG.getNode(ARMISD::CMP, dl, MVT::Glue, Value, LHS); | ||||
4882 | break; | ||||
4883 | case ISD::UADDO: | ||||
4884 | ARMcc = DAG.getConstant(ARMCC::HS, dl, MVT::i32); | ||||
4885 | // We use ADDC here to correspond to its use in LowerUnsignedALUO. | ||||
4886 | // We do not use it in the USUBO case as Value may not be used. | ||||
4887 | Value = DAG.getNode(ARMISD::ADDC, dl, | ||||
4888 | DAG.getVTList(Op.getValueType(), MVT::i32), LHS, RHS) | ||||
4889 | .getValue(0); | ||||
4890 | OverflowCmp = DAG.getNode(ARMISD::CMP, dl, MVT::Glue, Value, LHS); | ||||
4891 | break; | ||||
4892 | case ISD::SSUBO: | ||||
4893 | ARMcc = DAG.getConstant(ARMCC::VC, dl, MVT::i32); | ||||
4894 | Value = DAG.getNode(ISD::SUB, dl, Op.getValueType(), LHS, RHS); | ||||
4895 | OverflowCmp = DAG.getNode(ARMISD::CMP, dl, MVT::Glue, LHS, RHS); | ||||
4896 | break; | ||||
4897 | case ISD::USUBO: | ||||
4898 | ARMcc = DAG.getConstant(ARMCC::HS, dl, MVT::i32); | ||||
4899 | Value = DAG.getNode(ISD::SUB, dl, Op.getValueType(), LHS, RHS); | ||||
4900 | OverflowCmp = DAG.getNode(ARMISD::CMP, dl, MVT::Glue, LHS, RHS); | ||||
4901 | break; | ||||
4902 | case ISD::UMULO: | ||||
4903 | // We generate a UMUL_LOHI and then check if the high word is 0. | ||||
4904 | ARMcc = DAG.getConstant(ARMCC::EQ, dl, MVT::i32); | ||||
4905 | Value = DAG.getNode(ISD::UMUL_LOHI, dl, | ||||
4906 | DAG.getVTList(Op.getValueType(), Op.getValueType()), | ||||
4907 | LHS, RHS); | ||||
4908 | OverflowCmp = DAG.getNode(ARMISD::CMP, dl, MVT::Glue, Value.getValue(1), | ||||
4909 | DAG.getConstant(0, dl, MVT::i32)); | ||||
4910 | Value = Value.getValue(0); // We only want the low 32 bits for the result. | ||||
4911 | break; | ||||
4912 | case ISD::SMULO: | ||||
4913 | // We generate a SMUL_LOHI and then check if all the bits of the high word | ||||
4914 | // are the same as the sign bit of the low word. | ||||
4915 | ARMcc = DAG.getConstant(ARMCC::EQ, dl, MVT::i32); | ||||
4916 | Value = DAG.getNode(ISD::SMUL_LOHI, dl, | ||||
4917 | DAG.getVTList(Op.getValueType(), Op.getValueType()), | ||||
4918 | LHS, RHS); | ||||
4919 | OverflowCmp = DAG.getNode(ARMISD::CMP, dl, MVT::Glue, Value.getValue(1), | ||||
4920 | DAG.getNode(ISD::SRA, dl, Op.getValueType(), | ||||
4921 | Value.getValue(0), | ||||
4922 | DAG.getConstant(31, dl, MVT::i32))); | ||||
4923 | Value = Value.getValue(0); // We only want the low 32 bits for the result. | ||||
4924 | break; | ||||
4925 | } // switch (...) | ||||
4926 | |||||
4927 | return std::make_pair(Value, OverflowCmp); | ||||
4928 | } | ||||
4929 | |||||
4930 | SDValue | ||||
4931 | ARMTargetLowering::LowerSignedALUO(SDValue Op, SelectionDAG &DAG) const { | ||||
4932 | // Let legalize expand this if it isn't a legal type yet. | ||||
4933 | if (!DAG.getTargetLoweringInfo().isTypeLegal(Op.getValueType())) | ||||
4934 | return SDValue(); | ||||
4935 | |||||
4936 | SDValue Value, OverflowCmp; | ||||
4937 | SDValue ARMcc; | ||||
4938 | std::tie(Value, OverflowCmp) = getARMXALUOOp(Op, DAG, ARMcc); | ||||
4939 | SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32); | ||||
4940 | SDLoc dl(Op); | ||||
4941 | // We use 0 and 1 as false and true values. | ||||
4942 | SDValue TVal = DAG.getConstant(1, dl, MVT::i32); | ||||
4943 | SDValue FVal = DAG.getConstant(0, dl, MVT::i32); | ||||
4944 | EVT VT = Op.getValueType(); | ||||
4945 | |||||
4946 | SDValue Overflow = DAG.getNode(ARMISD::CMOV, dl, VT, TVal, FVal, | ||||
4947 | ARMcc, CCR, OverflowCmp); | ||||
4948 | |||||
4949 | SDVTList VTs = DAG.getVTList(Op.getValueType(), MVT::i32); | ||||
4950 | return DAG.getNode(ISD::MERGE_VALUES, dl, VTs, Value, Overflow); | ||||
4951 | } | ||||
4952 | |||||
4953 | static SDValue ConvertBooleanCarryToCarryFlag(SDValue BoolCarry, | ||||
4954 | SelectionDAG &DAG) { | ||||
4955 | SDLoc DL(BoolCarry); | ||||
4956 | EVT CarryVT = BoolCarry.getValueType(); | ||||
4957 | |||||
4958 | // This converts the boolean value carry into the carry flag by doing | ||||
4959 | // ARMISD::SUBC Carry, 1 | ||||
4960 | SDValue Carry = DAG.getNode(ARMISD::SUBC, DL, | ||||
4961 | DAG.getVTList(CarryVT, MVT::i32), | ||||
4962 | BoolCarry, DAG.getConstant(1, DL, CarryVT)); | ||||
4963 | return Carry.getValue(1); | ||||
4964 | } | ||||
4965 | |||||
4966 | static SDValue ConvertCarryFlagToBooleanCarry(SDValue Flags, EVT VT, | ||||
4967 | SelectionDAG &DAG) { | ||||
4968 | SDLoc DL(Flags); | ||||
4969 | |||||
4970 | // Now convert the carry flag into a boolean carry. We do this | ||||
4971 | // using ARMISD:ADDE 0, 0, Carry | ||||
4972 | return DAG.getNode(ARMISD::ADDE, DL, DAG.getVTList(VT, MVT::i32), | ||||
4973 | DAG.getConstant(0, DL, MVT::i32), | ||||
4974 | DAG.getConstant(0, DL, MVT::i32), Flags); | ||||
4975 | } | ||||
4976 | |||||
4977 | SDValue ARMTargetLowering::LowerUnsignedALUO(SDValue Op, | ||||
4978 | SelectionDAG &DAG) const { | ||||
4979 | // Let legalize expand this if it isn't a legal type yet. | ||||
4980 | if (!DAG.getTargetLoweringInfo().isTypeLegal(Op.getValueType())) | ||||
4981 | return SDValue(); | ||||
4982 | |||||
4983 | SDValue LHS = Op.getOperand(0); | ||||
4984 | SDValue RHS = Op.getOperand(1); | ||||
4985 | SDLoc dl(Op); | ||||
4986 | |||||
4987 | EVT VT = Op.getValueType(); | ||||
4988 | SDVTList VTs = DAG.getVTList(VT, MVT::i32); | ||||
4989 | SDValue Value; | ||||
4990 | SDValue Overflow; | ||||
4991 | switch (Op.getOpcode()) { | ||||
4992 | default: | ||||
4993 | llvm_unreachable("Unknown overflow instruction!")::llvm::llvm_unreachable_internal("Unknown overflow instruction!" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 4993); | ||||
4994 | case ISD::UADDO: | ||||
4995 | Value = DAG.getNode(ARMISD::ADDC, dl, VTs, LHS, RHS); | ||||
4996 | // Convert the carry flag into a boolean value. | ||||
4997 | Overflow = ConvertCarryFlagToBooleanCarry(Value.getValue(1), VT, DAG); | ||||
4998 | break; | ||||
4999 | case ISD::USUBO: { | ||||
5000 | Value = DAG.getNode(ARMISD::SUBC, dl, VTs, LHS, RHS); | ||||
5001 | // Convert the carry flag into a boolean value. | ||||
5002 | Overflow = ConvertCarryFlagToBooleanCarry(Value.getValue(1), VT, DAG); | ||||
5003 | // ARMISD::SUBC returns 0 when we have to borrow, so make it an overflow | ||||
5004 | // value. So compute 1 - C. | ||||
5005 | Overflow = DAG.getNode(ISD::SUB, dl, MVT::i32, | ||||
5006 | DAG.getConstant(1, dl, MVT::i32), Overflow); | ||||
5007 | break; | ||||
5008 | } | ||||
5009 | } | ||||
5010 | |||||
5011 | return DAG.getNode(ISD::MERGE_VALUES, dl, VTs, Value, Overflow); | ||||
5012 | } | ||||
5013 | |||||
5014 | static SDValue LowerADDSUBSAT(SDValue Op, SelectionDAG &DAG, | ||||
5015 | const ARMSubtarget *Subtarget) { | ||||
5016 | EVT VT = Op.getValueType(); | ||||
5017 | if (!Subtarget->hasV6Ops() || !Subtarget->hasDSP()) | ||||
5018 | return SDValue(); | ||||
5019 | if (!VT.isSimple()) | ||||
5020 | return SDValue(); | ||||
5021 | |||||
5022 | unsigned NewOpcode; | ||||
5023 | switch (VT.getSimpleVT().SimpleTy) { | ||||
5024 | default: | ||||
5025 | return SDValue(); | ||||
5026 | case MVT::i8: | ||||
5027 | switch (Op->getOpcode()) { | ||||
5028 | case ISD::UADDSAT: | ||||
5029 | NewOpcode = ARMISD::UQADD8b; | ||||
5030 | break; | ||||
5031 | case ISD::SADDSAT: | ||||
5032 | NewOpcode = ARMISD::QADD8b; | ||||
5033 | break; | ||||
5034 | case ISD::USUBSAT: | ||||
5035 | NewOpcode = ARMISD::UQSUB8b; | ||||
5036 | break; | ||||
5037 | case ISD::SSUBSAT: | ||||
5038 | NewOpcode = ARMISD::QSUB8b; | ||||
5039 | break; | ||||
5040 | } | ||||
5041 | break; | ||||
5042 | case MVT::i16: | ||||
5043 | switch (Op->getOpcode()) { | ||||
5044 | case ISD::UADDSAT: | ||||
5045 | NewOpcode = ARMISD::UQADD16b; | ||||
5046 | break; | ||||
5047 | case ISD::SADDSAT: | ||||
5048 | NewOpcode = ARMISD::QADD16b; | ||||
5049 | break; | ||||
5050 | case ISD::USUBSAT: | ||||
5051 | NewOpcode = ARMISD::UQSUB16b; | ||||
5052 | break; | ||||
5053 | case ISD::SSUBSAT: | ||||
5054 | NewOpcode = ARMISD::QSUB16b; | ||||
5055 | break; | ||||
5056 | } | ||||
5057 | break; | ||||
5058 | } | ||||
5059 | |||||
5060 | SDLoc dl(Op); | ||||
5061 | SDValue Add = | ||||
5062 | DAG.getNode(NewOpcode, dl, MVT::i32, | ||||
5063 | DAG.getSExtOrTrunc(Op->getOperand(0), dl, MVT::i32), | ||||
5064 | DAG.getSExtOrTrunc(Op->getOperand(1), dl, MVT::i32)); | ||||
5065 | return DAG.getNode(ISD::TRUNCATE, dl, VT, Add); | ||||
5066 | } | ||||
5067 | |||||
5068 | SDValue ARMTargetLowering::LowerSELECT(SDValue Op, SelectionDAG &DAG) const { | ||||
5069 | SDValue Cond = Op.getOperand(0); | ||||
5070 | SDValue SelectTrue = Op.getOperand(1); | ||||
5071 | SDValue SelectFalse = Op.getOperand(2); | ||||
5072 | SDLoc dl(Op); | ||||
5073 | unsigned Opc = Cond.getOpcode(); | ||||
5074 | |||||
5075 | if (Cond.getResNo() == 1 && | ||||
5076 | (Opc == ISD::SADDO || Opc == ISD::UADDO || Opc == ISD::SSUBO || | ||||
5077 | Opc == ISD::USUBO)) { | ||||
5078 | if (!DAG.getTargetLoweringInfo().isTypeLegal(Cond->getValueType(0))) | ||||
5079 | return SDValue(); | ||||
5080 | |||||
5081 | SDValue Value, OverflowCmp; | ||||
5082 | SDValue ARMcc; | ||||
5083 | std::tie(Value, OverflowCmp) = getARMXALUOOp(Cond, DAG, ARMcc); | ||||
5084 | SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32); | ||||
5085 | EVT VT = Op.getValueType(); | ||||
5086 | |||||
5087 | return getCMOV(dl, VT, SelectTrue, SelectFalse, ARMcc, CCR, | ||||
5088 | OverflowCmp, DAG); | ||||
5089 | } | ||||
5090 | |||||
5091 | // Convert: | ||||
5092 | // | ||||
5093 | // (select (cmov 1, 0, cond), t, f) -> (cmov t, f, cond) | ||||
5094 | // (select (cmov 0, 1, cond), t, f) -> (cmov f, t, cond) | ||||
5095 | // | ||||
5096 | if (Cond.getOpcode() == ARMISD::CMOV && Cond.hasOneUse()) { | ||||
5097 | const ConstantSDNode *CMOVTrue = | ||||
5098 | dyn_cast<ConstantSDNode>(Cond.getOperand(0)); | ||||
5099 | const ConstantSDNode *CMOVFalse = | ||||
5100 | dyn_cast<ConstantSDNode>(Cond.getOperand(1)); | ||||
5101 | |||||
5102 | if (CMOVTrue && CMOVFalse) { | ||||
5103 | unsigned CMOVTrueVal = CMOVTrue->getZExtValue(); | ||||
5104 | unsigned CMOVFalseVal = CMOVFalse->getZExtValue(); | ||||
5105 | |||||
5106 | SDValue True; | ||||
5107 | SDValue False; | ||||
5108 | if (CMOVTrueVal == 1 && CMOVFalseVal == 0) { | ||||
5109 | True = SelectTrue; | ||||
5110 | False = SelectFalse; | ||||
5111 | } else if (CMOVTrueVal == 0 && CMOVFalseVal == 1) { | ||||
5112 | True = SelectFalse; | ||||
5113 | False = SelectTrue; | ||||
5114 | } | ||||
5115 | |||||
5116 | if (True.getNode() && False.getNode()) { | ||||
5117 | EVT VT = Op.getValueType(); | ||||
5118 | SDValue ARMcc = Cond.getOperand(2); | ||||
5119 | SDValue CCR = Cond.getOperand(3); | ||||
5120 | SDValue Cmp = duplicateCmp(Cond.getOperand(4), DAG); | ||||
5121 | assert(True.getValueType() == VT)(static_cast <bool> (True.getValueType() == VT) ? void ( 0) : __assert_fail ("True.getValueType() == VT", "llvm/lib/Target/ARM/ARMISelLowering.cpp" , 5121, __extension__ __PRETTY_FUNCTION__)); | ||||
5122 | return getCMOV(dl, VT, True, False, ARMcc, CCR, Cmp, DAG); | ||||
5123 | } | ||||
5124 | } | ||||
5125 | } | ||||
5126 | |||||
5127 | // ARM's BooleanContents value is UndefinedBooleanContent. Mask out the | ||||
5128 | // undefined bits before doing a full-word comparison with zero. | ||||
5129 | Cond = DAG.getNode(ISD::AND, dl, Cond.getValueType(), Cond, | ||||
5130 | DAG.getConstant(1, dl, Cond.getValueType())); | ||||
5131 | |||||
5132 | return DAG.getSelectCC(dl, Cond, | ||||
5133 | DAG.getConstant(0, dl, Cond.getValueType()), | ||||
5134 | SelectTrue, SelectFalse, ISD::SETNE); | ||||
5135 | } | ||||
5136 | |||||
5137 | static void checkVSELConstraints(ISD::CondCode CC, ARMCC::CondCodes &CondCode, | ||||
5138 | bool &swpCmpOps, bool &swpVselOps) { | ||||
5139 | // Start by selecting the GE condition code for opcodes that return true for | ||||
5140 | // 'equality' | ||||
5141 | if (CC == ISD::SETUGE || CC == ISD::SETOGE || CC == ISD::SETOLE || | ||||
5142 | CC == ISD::SETULE || CC == ISD::SETGE || CC == ISD::SETLE) | ||||
5143 | CondCode = ARMCC::GE; | ||||
5144 | |||||
5145 | // and GT for opcodes that return false for 'equality'. | ||||
5146 | else if (CC == ISD::SETUGT || CC == ISD::SETOGT || CC == ISD::SETOLT || | ||||
5147 | CC == ISD::SETULT || CC == ISD::SETGT || CC == ISD::SETLT) | ||||
5148 | CondCode = ARMCC::GT; | ||||
5149 | |||||
5150 | // Since we are constrained to GE/GT, if the opcode contains 'less', we need | ||||
5151 | // to swap the compare operands. | ||||
5152 | if (CC == ISD::SETOLE || CC == ISD::SETULE || CC == ISD::SETOLT || | ||||
5153 | CC == ISD::SETULT || CC == ISD::SETLE || CC == ISD::SETLT) | ||||
5154 | swpCmpOps = true; | ||||
5155 | |||||
5156 | // Both GT and GE are ordered comparisons, and return false for 'unordered'. | ||||
5157 | // If we have an unordered opcode, we need to swap the operands to the VSEL | ||||
5158 | // instruction (effectively negating the condition). | ||||
5159 | // | ||||
5160 | // This also has the effect of swapping which one of 'less' or 'greater' | ||||
5161 | // returns true, so we also swap the compare operands. It also switches | ||||
5162 | // whether we return true for 'equality', so we compensate by picking the | ||||
5163 | // opposite condition code to our original choice. | ||||
5164 | if (CC == ISD::SETULE || CC == ISD::SETULT || CC == ISD::SETUGE || | ||||
5165 | CC == ISD::SETUGT) { | ||||
5166 | swpCmpOps = !swpCmpOps; | ||||
5167 | swpVselOps = !swpVselOps; | ||||
5168 | CondCode = CondCode == ARMCC::GT ? ARMCC::GE : ARMCC::GT; | ||||
5169 | } | ||||
5170 | |||||
5171 | // 'ordered' is 'anything but unordered', so use the VS condition code and | ||||
5172 | // swap the VSEL operands. | ||||
5173 | if (CC == ISD::SETO) { | ||||
5174 | CondCode = ARMCC::VS; | ||||
5175 | swpVselOps = true; | ||||
5176 | } | ||||
5177 | |||||
5178 | // 'unordered or not equal' is 'anything but equal', so use the EQ condition | ||||
5179 | // code and swap the VSEL operands. Also do this if we don't care about the | ||||
5180 | // unordered case. | ||||
5181 | if (CC == ISD::SETUNE || CC == ISD::SETNE) { | ||||
5182 | CondCode = ARMCC::EQ; | ||||
5183 | swpVselOps = true; | ||||
5184 | } | ||||
5185 | } | ||||
5186 | |||||
5187 | SDValue ARMTargetLowering::getCMOV(const SDLoc &dl, EVT VT, SDValue FalseVal, | ||||
5188 | SDValue TrueVal, SDValue ARMcc, SDValue CCR, | ||||
5189 | SDValue Cmp, SelectionDAG &DAG) const { | ||||
5190 | if (!Subtarget->hasFP64() && VT == MVT::f64) { | ||||
5191 | FalseVal = DAG.getNode(ARMISD::VMOVRRD, dl, | ||||
5192 | DAG.getVTList(MVT::i32, MVT::i32), FalseVal); | ||||
5193 | TrueVal = DAG.getNode(ARMISD::VMOVRRD, dl, | ||||
5194 | DAG.getVTList(MVT::i32, MVT::i32), TrueVal); | ||||
5195 | |||||
5196 | SDValue TrueLow = TrueVal.getValue(0); | ||||
5197 | SDValue TrueHigh = TrueVal.getValue(1); | ||||
5198 | SDValue FalseLow = FalseVal.getValue(0); | ||||
5199 | SDValue FalseHigh = FalseVal.getValue(1); | ||||
5200 | |||||
5201 | SDValue Low = DAG.getNode(ARMISD::CMOV, dl, MVT::i32, FalseLow, TrueLow, | ||||
5202 | ARMcc, CCR, Cmp); | ||||
5203 | SDValue High = DAG.getNode(ARMISD::CMOV, dl, MVT::i32, FalseHigh, TrueHigh, | ||||
5204 | ARMcc, CCR, duplicateCmp(Cmp, DAG)); | ||||
5205 | |||||
5206 | return DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Low, High); | ||||
5207 | } else { | ||||
5208 | return DAG.getNode(ARMISD::CMOV, dl, VT, FalseVal, TrueVal, ARMcc, CCR, | ||||
5209 | Cmp); | ||||
5210 | } | ||||
5211 | } | ||||
5212 | |||||
5213 | static bool isGTorGE(ISD::CondCode CC) { | ||||
5214 | return CC == ISD::SETGT || CC == ISD::SETGE; | ||||
5215 | } | ||||
5216 | |||||
5217 | static bool isLTorLE(ISD::CondCode CC) { | ||||
5218 | return CC == ISD::SETLT || CC == ISD::SETLE; | ||||
5219 | } | ||||
5220 | |||||
5221 | // See if a conditional (LHS CC RHS ? TrueVal : FalseVal) is lower-saturating. | ||||
5222 | // All of these conditions (and their <= and >= counterparts) will do: | ||||
5223 | // x < k ? k : x | ||||
5224 | // x > k ? x : k | ||||
5225 | // k < x ? x : k | ||||
5226 | // k > x ? k : x | ||||
5227 | static bool isLowerSaturate(const SDValue LHS, const SDValue RHS, | ||||
5228 | const SDValue TrueVal, const SDValue FalseVal, | ||||
5229 | const ISD::CondCode CC, const SDValue K) { | ||||
5230 | return (isGTorGE(CC) && | ||||
5231 | ((K == LHS && K == TrueVal) || (K == RHS && K == FalseVal))) || | ||||
5232 | (isLTorLE(CC) && | ||||
5233 | ((K == RHS && K == TrueVal) || (K == LHS && K == FalseVal))); | ||||
5234 | } | ||||
5235 | |||||
5236 | // Check if two chained conditionals could be converted into SSAT or USAT. | ||||
5237 | // | ||||
5238 | // SSAT can replace a set of two conditional selectors that bound a number to an | ||||
5239 | // interval of type [k, ~k] when k + 1 is a power of 2. Here are some examples: | ||||
5240 | // | ||||
5241 | // x < -k ? -k : (x > k ? k : x) | ||||
5242 | // x < -k ? -k : (x < k ? x : k) | ||||
5243 | // x > -k ? (x > k ? k : x) : -k | ||||
5244 | // x < k ? (x < -k ? -k : x) : k | ||||
5245 | // etc. | ||||
5246 | // | ||||
5247 | // LLVM canonicalizes these to either a min(max()) or a max(min()) | ||||
5248 | // pattern. This function tries to match one of these and will return a SSAT | ||||
5249 | // node if successful. | ||||
5250 | // | ||||
5251 | // USAT works similarily to SSAT but bounds on the interval [0, k] where k + 1 | ||||
5252 | // is a power of 2. | ||||
5253 | static SDValue LowerSaturatingConditional(SDValue Op, SelectionDAG &DAG) { | ||||
5254 | EVT VT = Op.getValueType(); | ||||
5255 | SDValue V1 = Op.getOperand(0); | ||||
5256 | SDValue K1 = Op.getOperand(1); | ||||
5257 | SDValue TrueVal1 = Op.getOperand(2); | ||||
5258 | SDValue FalseVal1 = Op.getOperand(3); | ||||
5259 | ISD::CondCode CC1 = cast<CondCodeSDNode>(Op.getOperand(4))->get(); | ||||
5260 | |||||
5261 | const SDValue Op2 = isa<ConstantSDNode>(TrueVal1) ? FalseVal1 : TrueVal1; | ||||
5262 | if (Op2.getOpcode() != ISD::SELECT_CC) | ||||
5263 | return SDValue(); | ||||
5264 | |||||
5265 | SDValue V2 = Op2.getOperand(0); | ||||
5266 | SDValue K2 = Op2.getOperand(1); | ||||
5267 | SDValue TrueVal2 = Op2.getOperand(2); | ||||
5268 | SDValue FalseVal2 = Op2.getOperand(3); | ||||
5269 | ISD::CondCode CC2 = cast<CondCodeSDNode>(Op2.getOperand(4))->get(); | ||||
5270 | |||||
5271 | SDValue V1Tmp = V1; | ||||
5272 | SDValue V2Tmp = V2; | ||||
5273 | |||||
5274 | // Check that the registers and the constants match a max(min()) or min(max()) | ||||
5275 | // pattern | ||||
5276 | if (V1Tmp != TrueVal1 || V2Tmp != TrueVal2 || K1 != FalseVal1 || | ||||
5277 | K2 != FalseVal2 || | ||||
5278 | !((isGTorGE(CC1) && isLTorLE(CC2)) || (isLTorLE(CC1) && isGTorGE(CC2)))) | ||||
5279 | return SDValue(); | ||||
5280 | |||||
5281 | // Check that the constant in the lower-bound check is | ||||
5282 | // the opposite of the constant in the upper-bound check | ||||
5283 | // in 1's complement. | ||||
5284 | if (!isa<ConstantSDNode>(K1) || !isa<ConstantSDNode>(K2)) | ||||
5285 | return SDValue(); | ||||
5286 | |||||
5287 | int64_t Val1 = cast<ConstantSDNode>(K1)->getSExtValue(); | ||||
5288 | int64_t Val2 = cast<ConstantSDNode>(K2)->getSExtValue(); | ||||
5289 | int64_t PosVal = std::max(Val1, Val2); | ||||
5290 | int64_t NegVal = std::min(Val1, Val2); | ||||
5291 | |||||
5292 | if (!((Val1 > Val2 && isLTorLE(CC1)) || (Val1 < Val2 && isLTorLE(CC2))) || | ||||
5293 | !isPowerOf2_64(PosVal + 1)) | ||||
5294 | return SDValue(); | ||||
5295 | |||||
5296 | // Handle the difference between USAT (unsigned) and SSAT (signed) | ||||
5297 | // saturation | ||||
5298 | // At this point, PosVal is guaranteed to be positive | ||||
5299 | uint64_t K = PosVal; | ||||
5300 | SDLoc dl(Op); | ||||
5301 | if (Val1 == ~Val2) | ||||
5302 | return DAG.getNode(ARMISD::SSAT, dl, VT, V2Tmp, | ||||
5303 | DAG.getConstant(countTrailingOnes(K), dl, VT)); | ||||
5304 | if (NegVal == 0) | ||||
5305 | return DAG.getNode(ARMISD::USAT, dl, VT, V2Tmp, | ||||
5306 | DAG.getConstant(countTrailingOnes(K), dl, VT)); | ||||
5307 | |||||
5308 | return SDValue(); | ||||
5309 | } | ||||
5310 | |||||
5311 | // Check if a condition of the type x < k ? k : x can be converted into a | ||||
5312 | // bit operation instead of conditional moves. | ||||
5313 | // Currently this is allowed given: | ||||
5314 | // - The conditions and values match up | ||||
5315 | // - k is 0 or -1 (all ones) | ||||
5316 | // This function will not check the last condition, thats up to the caller | ||||
5317 | // It returns true if the transformation can be made, and in such case | ||||
5318 | // returns x in V, and k in SatK. | ||||
5319 | static bool isLowerSaturatingConditional(const SDValue &Op, SDValue &V, | ||||
5320 | SDValue &SatK) | ||||
5321 | { | ||||
5322 | SDValue LHS = Op.getOperand(0); | ||||
5323 | SDValue RHS = Op.getOperand(1); | ||||
5324 | ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(4))->get(); | ||||
5325 | SDValue TrueVal = Op.getOperand(2); | ||||
5326 | SDValue FalseVal = Op.getOperand(3); | ||||
5327 | |||||
5328 | SDValue *K = isa<ConstantSDNode>(LHS) ? &LHS : isa<ConstantSDNode>(RHS) | ||||
5329 | ? &RHS | ||||
5330 | : nullptr; | ||||
5331 | |||||
5332 | // No constant operation in comparison, early out | ||||
5333 | if (!K) | ||||
5334 | return false; | ||||
5335 | |||||
5336 | SDValue KTmp = isa<ConstantSDNode>(TrueVal) ? TrueVal : FalseVal; | ||||
5337 | V = (KTmp == TrueVal) ? FalseVal : TrueVal; | ||||
5338 | SDValue VTmp = (K && *K == LHS) ? RHS : LHS; | ||||
5339 | |||||
5340 | // If the constant on left and right side, or variable on left and right, | ||||
5341 | // does not match, early out | ||||
5342 | if (*K != KTmp || V != VTmp) | ||||
5343 | return false; | ||||
5344 | |||||
5345 | if (isLowerSaturate(LHS, RHS, TrueVal, FalseVal, CC, *K)) { | ||||
5346 | SatK = *K; | ||||
5347 | return true; | ||||
5348 | } | ||||
5349 | |||||
5350 | return false; | ||||
5351 | } | ||||
5352 | |||||
5353 | bool ARMTargetLowering::isUnsupportedFloatingType(EVT VT) const { | ||||
5354 | if (VT == MVT::f32) | ||||
5355 | return !Subtarget->hasVFP2Base(); | ||||
5356 | if (VT == MVT::f64) | ||||
5357 | return !Subtarget->hasFP64(); | ||||
5358 | if (VT == MVT::f16) | ||||
5359 | return !Subtarget->hasFullFP16(); | ||||
5360 | return false; | ||||
5361 | } | ||||
5362 | |||||
5363 | SDValue ARMTargetLowering::LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const { | ||||
5364 | EVT VT = Op.getValueType(); | ||||
5365 | SDLoc dl(Op); | ||||
5366 | |||||
5367 | // Try to convert two saturating conditional selects into a single SSAT | ||||
5368 | if ((!Subtarget->isThumb() && Subtarget->hasV6Ops()) || Subtarget->isThumb2()) | ||||
5369 | if (SDValue SatValue = LowerSaturatingConditional(Op, DAG)) | ||||
5370 | return SatValue; | ||||
5371 | |||||
5372 | // Try to convert expressions of the form x < k ? k : x (and similar forms) | ||||
5373 | // into more efficient bit operations, which is possible when k is 0 or -1 | ||||
5374 | // On ARM and Thumb-2 which have flexible operand 2 this will result in | ||||
5375 | // single instructions. On Thumb the shift and the bit operation will be two | ||||
5376 | // instructions. | ||||
5377 | // Only allow this transformation on full-width (32-bit) operations | ||||
5378 | SDValue LowerSatConstant; | ||||
5379 | SDValue SatValue; | ||||
5380 | if (VT == MVT::i32 && | ||||
5381 | isLowerSaturatingConditional(Op, SatValue, LowerSatConstant)) { | ||||
5382 | SDValue ShiftV = DAG.getNode(ISD::SRA, dl, VT, SatValue, | ||||
5383 | DAG.getConstant(31, dl, VT)); | ||||
5384 | if (isNullConstant(LowerSatConstant)) { | ||||
5385 | SDValue NotShiftV = DAG.getNode(ISD::XOR, dl, VT, ShiftV, | ||||
5386 | DAG.getAllOnesConstant(dl, VT)); | ||||
5387 | return DAG.getNode(ISD::AND, dl, VT, SatValue, NotShiftV); | ||||
5388 | } else if (isAllOnesConstant(LowerSatConstant)) | ||||
5389 | return DAG.getNode(ISD::OR, dl, VT, SatValue, ShiftV); | ||||
5390 | } | ||||
5391 | |||||
5392 | SDValue LHS = Op.getOperand(0); | ||||
5393 | SDValue RHS = Op.getOperand(1); | ||||
5394 | ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(4))->get(); | ||||
5395 | SDValue TrueVal = Op.getOperand(2); | ||||
5396 | SDValue FalseVal = Op.getOperand(3); | ||||
5397 | ConstantSDNode *CFVal = dyn_cast<ConstantSDNode>(FalseVal); | ||||
5398 | ConstantSDNode *CTVal = dyn_cast<ConstantSDNode>(TrueVal); | ||||
5399 | |||||
5400 | if (Subtarget->hasV8_1MMainlineOps() && CFVal && CTVal && | ||||
5401 | LHS.getValueType() == MVT::i32 && RHS.getValueType() == MVT::i32) { | ||||
5402 | unsigned TVal = CTVal->getZExtValue(); | ||||
5403 | unsigned FVal = CFVal->getZExtValue(); | ||||
5404 | unsigned Opcode = 0; | ||||
5405 | |||||
5406 | if (TVal == ~FVal) { | ||||
5407 | Opcode = ARMISD::CSINV; | ||||
5408 | } else if (TVal == ~FVal + 1) { | ||||
5409 | Opcode = ARMISD::CSNEG; | ||||
5410 | } else if (TVal + 1 == FVal) { | ||||
5411 | Opcode = ARMISD::CSINC; | ||||
5412 | } else if (TVal == FVal + 1) { | ||||
5413 | Opcode = ARMISD::CSINC; | ||||
5414 | std::swap(TrueVal, FalseVal); | ||||
5415 | std::swap(TVal, FVal); | ||||
5416 | CC = ISD::getSetCCInverse(CC, LHS.getValueType()); | ||||
5417 | } | ||||
5418 | |||||
5419 | if (Opcode) { | ||||
5420 | // If one of the constants is cheaper than another, materialise the | ||||
5421 | // cheaper one and let the csel generate the other. | ||||
5422 | if (Opcode != ARMISD::CSINC && | ||||
5423 | HasLowerConstantMaterializationCost(FVal, TVal, Subtarget)) { | ||||
5424 | std::swap(TrueVal, FalseVal); | ||||
5425 | std::swap(TVal, FVal); | ||||
5426 | CC = ISD::getSetCCInverse(CC, LHS.getValueType()); | ||||
5427 | } | ||||
5428 | |||||
5429 | // Attempt to use ZR checking TVal is 0, possibly inverting the condition | ||||
5430 | // to get there. CSINC not is invertable like the other two (~(~a) == a, | ||||
5431 | // -(-a) == a, but (a+1)+1 != a). | ||||
5432 | if (FVal == 0 && Opcode != ARMISD::CSINC) { | ||||
5433 | std::swap(TrueVal, FalseVal); | ||||
5434 | std::swap(TVal, FVal); | ||||
5435 | CC = ISD::getSetCCInverse(CC, LHS.getValueType()); | ||||
5436 | } | ||||
5437 | |||||
5438 | // Drops F's value because we can get it by inverting/negating TVal. | ||||
5439 | FalseVal = TrueVal; | ||||
5440 | |||||
5441 | SDValue ARMcc; | ||||
5442 | SDValue Cmp = getARMCmp(LHS, RHS, CC, ARMcc, DAG, dl); | ||||
5443 | EVT VT = TrueVal.getValueType(); | ||||
5444 | return DAG.getNode(Opcode, dl, VT, TrueVal, FalseVal, ARMcc, Cmp); | ||||
5445 | } | ||||
5446 | } | ||||
5447 | |||||
5448 | if (isUnsupportedFloatingType(LHS.getValueType())) { | ||||
5449 | DAG.getTargetLoweringInfo().softenSetCCOperands( | ||||
5450 | DAG, LHS.getValueType(), LHS, RHS, CC, dl, LHS, RHS); | ||||
5451 | |||||
5452 | // If softenSetCCOperands only returned one value, we should compare it to | ||||
5453 | // zero. | ||||
5454 | if (!RHS.getNode()) { | ||||
5455 | RHS = DAG.getConstant(0, dl, LHS.getValueType()); | ||||
5456 | CC = ISD::SETNE; | ||||
5457 | } | ||||
5458 | } | ||||
5459 | |||||
5460 | if (LHS.getValueType() == MVT::i32) { | ||||
5461 | // Try to generate VSEL on ARMv8. | ||||
5462 | // The VSEL instruction can't use all the usual ARM condition | ||||
5463 | // codes: it only has two bits to select the condition code, so it's | ||||
5464 | // constrained to use only GE, GT, VS and EQ. | ||||
5465 | // | ||||
5466 | // To implement all the various ISD::SETXXX opcodes, we sometimes need to | ||||
5467 | // swap the operands of the previous compare instruction (effectively | ||||
5468 | // inverting the compare condition, swapping 'less' and 'greater') and | ||||
5469 | // sometimes need to swap the operands to the VSEL (which inverts the | ||||
5470 | // condition in the sense of firing whenever the previous condition didn't) | ||||
5471 | if (Subtarget->hasFPARMv8Base() && (TrueVal.getValueType() == MVT::f16 || | ||||
5472 | TrueVal.getValueType() == MVT::f32 || | ||||
5473 | TrueVal.getValueType() == MVT::f64)) { | ||||
5474 | ARMCC::CondCodes CondCode = IntCCToARMCC(CC); | ||||
5475 | if (CondCode == ARMCC::LT || CondCode == ARMCC::LE || | ||||
5476 | CondCode == ARMCC::VC || CondCode == ARMCC::NE) { | ||||
5477 | CC = ISD::getSetCCInverse(CC, LHS.getValueType()); | ||||
5478 | std::swap(TrueVal, FalseVal); | ||||
5479 | } | ||||
5480 | } | ||||
5481 | |||||
5482 | SDValue ARMcc; | ||||
5483 | SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32); | ||||
5484 | SDValue Cmp = getARMCmp(LHS, RHS, CC, ARMcc, DAG, dl); | ||||
5485 | // Choose GE over PL, which vsel does now support | ||||
5486 | if (cast<ConstantSDNode>(ARMcc)->getZExtValue() == ARMCC::PL) | ||||
5487 | ARMcc = DAG.getConstant(ARMCC::GE, dl, MVT::i32); | ||||
5488 | return getCMOV(dl, VT, FalseVal, TrueVal, ARMcc, CCR, Cmp, DAG); | ||||
5489 | } | ||||
5490 | |||||
5491 | ARMCC::CondCodes CondCode, CondCode2; | ||||
5492 | FPCCToARMCC(CC, CondCode, CondCode2); | ||||
5493 | |||||
5494 | // Normalize the fp compare. If RHS is zero we prefer to keep it there so we | ||||
5495 | // match CMPFPw0 instead of CMPFP, though we don't do this for f16 because we | ||||
5496 | // must use VSEL (limited condition codes), due to not having conditional f16 | ||||
5497 | // moves. | ||||
5498 | if (Subtarget->hasFPARMv8Base() && | ||||
5499 | !(isFloatingPointZero(RHS) && TrueVal.getValueType() != MVT::f16) && | ||||
5500 | (TrueVal.getValueType() == MVT::f16 || | ||||
5501 | TrueVal.getValueType() == MVT::f32 || | ||||
5502 | TrueVal.getValueType() == MVT::f64)) { | ||||
5503 | bool swpCmpOps = false; | ||||
5504 | bool swpVselOps = false; | ||||
5505 | checkVSELConstraints(CC, CondCode, swpCmpOps, swpVselOps); | ||||
5506 | |||||
5507 | if (CondCode == ARMCC::GT || CondCode == ARMCC::GE || | ||||
5508 | CondCode == ARMCC::VS || CondCode == ARMCC::EQ) { | ||||
5509 | if (swpCmpOps) | ||||
5510 | std::swap(LHS, RHS); | ||||
5511 | if (swpVselOps) | ||||
5512 | std::swap(TrueVal, FalseVal); | ||||
5513 | } | ||||
5514 | } | ||||
5515 | |||||
5516 | SDValue ARMcc = DAG.getConstant(CondCode, dl, MVT::i32); | ||||
5517 | SDValue Cmp = getVFPCmp(LHS, RHS, DAG, dl); | ||||
5518 | SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32); | ||||
5519 | SDValue Result = getCMOV(dl, VT, FalseVal, TrueVal, ARMcc, CCR, Cmp, DAG); | ||||
5520 | if (CondCode2 != ARMCC::AL) { | ||||
5521 | SDValue ARMcc2 = DAG.getConstant(CondCode2, dl, MVT::i32); | ||||
5522 | // FIXME: Needs another CMP because flag can have but one use. | ||||
5523 | SDValue Cmp2 = getVFPCmp(LHS, RHS, DAG, dl); | ||||
5524 | Result = getCMOV(dl, VT, Result, TrueVal, ARMcc2, CCR, Cmp2, DAG); | ||||
5525 | } | ||||
5526 | return Result; | ||||
5527 | } | ||||
5528 | |||||
5529 | /// canChangeToInt - Given the fp compare operand, return true if it is suitable | ||||
5530 | /// to morph to an integer compare sequence. | ||||
5531 | static bool canChangeToInt(SDValue Op, bool &SeenZero, | ||||
5532 | const ARMSubtarget *Subtarget) { | ||||
5533 | SDNode *N = Op.getNode(); | ||||
5534 | if (!N->hasOneUse()) | ||||
5535 | // Otherwise it requires moving the value from fp to integer registers. | ||||
5536 | return false; | ||||
5537 | if (!N->getNumValues()) | ||||
5538 | return false; | ||||
5539 | EVT VT = Op.getValueType(); | ||||
5540 | if (VT != MVT::f32 && !Subtarget->isFPBrccSlow()) | ||||
5541 | // f32 case is generally profitable. f64 case only makes sense when vcmpe + | ||||
5542 | // vmrs are very slow, e.g. cortex-a8. | ||||
5543 | return false; | ||||
5544 | |||||
5545 | if (isFloatingPointZero(Op)) { | ||||
5546 | SeenZero = true; | ||||
5547 | return true; | ||||
5548 | } | ||||
5549 | return ISD::isNormalLoad(N); | ||||
5550 | } | ||||
5551 | |||||
5552 | static SDValue bitcastf32Toi32(SDValue Op, SelectionDAG &DAG) { | ||||
5553 | if (isFloatingPointZero(Op)) | ||||
5554 | return DAG.getConstant(0, SDLoc(Op), MVT::i32); | ||||
5555 | |||||
5556 | if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Op)) | ||||
5557 | return DAG.getLoad(MVT::i32, SDLoc(Op), Ld->getChain(), Ld->getBasePtr(), | ||||
5558 | Ld->getPointerInfo(), Ld->getAlignment(), | ||||
5559 | Ld->getMemOperand()->getFlags()); | ||||
5560 | |||||
5561 | llvm_unreachable("Unknown VFP cmp argument!")::llvm::llvm_unreachable_internal("Unknown VFP cmp argument!" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 5561); | ||||
5562 | } | ||||
5563 | |||||
5564 | static void expandf64Toi32(SDValue Op, SelectionDAG &DAG, | ||||
5565 | SDValue &RetVal1, SDValue &RetVal2) { | ||||
5566 | SDLoc dl(Op); | ||||
5567 | |||||
5568 | if (isFloatingPointZero(Op)) { | ||||
5569 | RetVal1 = DAG.getConstant(0, dl, MVT::i32); | ||||
5570 | RetVal2 = DAG.getConstant(0, dl, MVT::i32); | ||||
5571 | return; | ||||
5572 | } | ||||
5573 | |||||
5574 | if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Op)) { | ||||
5575 | SDValue Ptr = Ld->getBasePtr(); | ||||
5576 | RetVal1 = | ||||
5577 | DAG.getLoad(MVT::i32, dl, Ld->getChain(), Ptr, Ld->getPointerInfo(), | ||||
5578 | Ld->getAlignment(), Ld->getMemOperand()->getFlags()); | ||||
5579 | |||||
5580 | EVT PtrType = Ptr.getValueType(); | ||||
5581 | unsigned NewAlign = MinAlign(Ld->getAlignment(), 4); | ||||
5582 | SDValue NewPtr = DAG.getNode(ISD::ADD, dl, | ||||
5583 | PtrType, Ptr, DAG.getConstant(4, dl, PtrType)); | ||||
5584 | RetVal2 = DAG.getLoad(MVT::i32, dl, Ld->getChain(), NewPtr, | ||||
5585 | Ld->getPointerInfo().getWithOffset(4), NewAlign, | ||||
5586 | Ld->getMemOperand()->getFlags()); | ||||
5587 | return; | ||||
5588 | } | ||||
5589 | |||||
5590 | llvm_unreachable("Unknown VFP cmp argument!")::llvm::llvm_unreachable_internal("Unknown VFP cmp argument!" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 5590); | ||||
5591 | } | ||||
5592 | |||||
5593 | /// OptimizeVFPBrcond - With -enable-unsafe-fp-math, it's legal to optimize some | ||||
5594 | /// f32 and even f64 comparisons to integer ones. | ||||
5595 | SDValue | ||||
5596 | ARMTargetLowering::OptimizeVFPBrcond(SDValue Op, SelectionDAG &DAG) const { | ||||
5597 | SDValue Chain = Op.getOperand(0); | ||||
5598 | ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(1))->get(); | ||||
5599 | SDValue LHS = Op.getOperand(2); | ||||
5600 | SDValue RHS = Op.getOperand(3); | ||||
5601 | SDValue Dest = Op.getOperand(4); | ||||
5602 | SDLoc dl(Op); | ||||
5603 | |||||
5604 | bool LHSSeenZero = false; | ||||
5605 | bool LHSOk = canChangeToInt(LHS, LHSSeenZero, Subtarget); | ||||
5606 | bool RHSSeenZero = false; | ||||
5607 | bool RHSOk = canChangeToInt(RHS, RHSSeenZero, Subtarget); | ||||
5608 | if (LHSOk && RHSOk && (LHSSeenZero || RHSSeenZero)) { | ||||
5609 | // If unsafe fp math optimization is enabled and there are no other uses of | ||||
5610 | // the CMP operands, and the condition code is EQ or NE, we can optimize it | ||||
5611 | // to an integer comparison. | ||||
5612 | if (CC == ISD::SETOEQ) | ||||
5613 | CC = ISD::SETEQ; | ||||
5614 | else if (CC == ISD::SETUNE) | ||||
5615 | CC = ISD::SETNE; | ||||
5616 | |||||
5617 | SDValue Mask = DAG.getConstant(0x7fffffff, dl, MVT::i32); | ||||
5618 | SDValue ARMcc; | ||||
5619 | if (LHS.getValueType() == MVT::f32) { | ||||
5620 | LHS = DAG.getNode(ISD::AND, dl, MVT::i32, | ||||
5621 | bitcastf32Toi32(LHS, DAG), Mask); | ||||
5622 | RHS = DAG.getNode(ISD::AND, dl, MVT::i32, | ||||
5623 | bitcastf32Toi32(RHS, DAG), Mask); | ||||
5624 | SDValue Cmp = getARMCmp(LHS, RHS, CC, ARMcc, DAG, dl); | ||||
5625 | SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32); | ||||
5626 | return DAG.getNode(ARMISD::BRCOND, dl, MVT::Other, | ||||
5627 | Chain, Dest, ARMcc, CCR, Cmp); | ||||
5628 | } | ||||
5629 | |||||
5630 | SDValue LHS1, LHS2; | ||||
5631 | SDValue RHS1, RHS2; | ||||
5632 | expandf64Toi32(LHS, DAG, LHS1, LHS2); | ||||
5633 | expandf64Toi32(RHS, DAG, RHS1, RHS2); | ||||
5634 | LHS2 = DAG.getNode(ISD::AND, dl, MVT::i32, LHS2, Mask); | ||||
5635 | RHS2 = DAG.getNode(ISD::AND, dl, MVT::i32, RHS2, Mask); | ||||
5636 | ARMCC::CondCodes CondCode = IntCCToARMCC(CC); | ||||
5637 | ARMcc = DAG.getConstant(CondCode, dl, MVT::i32); | ||||
5638 | SDVTList VTList = DAG.getVTList(MVT::Other, MVT::Glue); | ||||
5639 | SDValue Ops[] = { Chain, ARMcc, LHS1, LHS2, RHS1, RHS2, Dest }; | ||||
5640 | return DAG.getNode(ARMISD::BCC_i64, dl, VTList, Ops); | ||||
5641 | } | ||||
5642 | |||||
5643 | return SDValue(); | ||||
5644 | } | ||||
5645 | |||||
5646 | SDValue ARMTargetLowering::LowerBRCOND(SDValue Op, SelectionDAG &DAG) const { | ||||
5647 | SDValue Chain = Op.getOperand(0); | ||||
5648 | SDValue Cond = Op.getOperand(1); | ||||
5649 | SDValue Dest = Op.getOperand(2); | ||||
5650 | SDLoc dl(Op); | ||||
5651 | |||||
5652 | // Optimize {s|u}{add|sub|mul}.with.overflow feeding into a branch | ||||
5653 | // instruction. | ||||
5654 | unsigned Opc = Cond.getOpcode(); | ||||
5655 | bool OptimizeMul = (Opc == ISD::SMULO || Opc == ISD::UMULO) && | ||||
5656 | !Subtarget->isThumb1Only(); | ||||
5657 | if (Cond.getResNo() == 1 && | ||||
5658 | (Opc == ISD::SADDO || Opc == ISD::UADDO || Opc == ISD::SSUBO || | ||||
5659 | Opc == ISD::USUBO || OptimizeMul)) { | ||||
5660 | // Only lower legal XALUO ops. | ||||
5661 | if (!DAG.getTargetLoweringInfo().isTypeLegal(Cond->getValueType(0))) | ||||
5662 | return SDValue(); | ||||
5663 | |||||
5664 | // The actual operation with overflow check. | ||||
5665 | SDValue Value, OverflowCmp; | ||||
5666 | SDValue ARMcc; | ||||
5667 | std::tie(Value, OverflowCmp) = getARMXALUOOp(Cond, DAG, ARMcc); | ||||
5668 | |||||
5669 | // Reverse the condition code. | ||||
5670 | ARMCC::CondCodes CondCode = | ||||
5671 | (ARMCC::CondCodes)cast<const ConstantSDNode>(ARMcc)->getZExtValue(); | ||||
5672 | CondCode = ARMCC::getOppositeCondition(CondCode); | ||||
5673 | ARMcc = DAG.getConstant(CondCode, SDLoc(ARMcc), MVT::i32); | ||||
5674 | SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32); | ||||
5675 | |||||
5676 | return DAG.getNode(ARMISD::BRCOND, dl, MVT::Other, Chain, Dest, ARMcc, CCR, | ||||
5677 | OverflowCmp); | ||||
5678 | } | ||||
5679 | |||||
5680 | return SDValue(); | ||||
5681 | } | ||||
5682 | |||||
5683 | SDValue ARMTargetLowering::LowerBR_CC(SDValue Op, SelectionDAG &DAG) const { | ||||
5684 | SDValue Chain = Op.getOperand(0); | ||||
5685 | ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(1))->get(); | ||||
5686 | SDValue LHS = Op.getOperand(2); | ||||
5687 | SDValue RHS = Op.getOperand(3); | ||||
5688 | SDValue Dest = Op.getOperand(4); | ||||
5689 | SDLoc dl(Op); | ||||
5690 | |||||
5691 | if (isUnsupportedFloatingType(LHS.getValueType())) { | ||||
5692 | DAG.getTargetLoweringInfo().softenSetCCOperands( | ||||
5693 | DAG, LHS.getValueType(), LHS, RHS, CC, dl, LHS, RHS); | ||||
5694 | |||||
5695 | // If softenSetCCOperands only returned one value, we should compare it to | ||||
5696 | // zero. | ||||
5697 | if (!RHS.getNode()) { | ||||
5698 | RHS = DAG.getConstant(0, dl, LHS.getValueType()); | ||||
5699 | CC = ISD::SETNE; | ||||
5700 | } | ||||
5701 | } | ||||
5702 | |||||
5703 | // Optimize {s|u}{add|sub|mul}.with.overflow feeding into a branch | ||||
5704 | // instruction. | ||||
5705 | unsigned Opc = LHS.getOpcode(); | ||||
5706 | bool OptimizeMul = (Opc == ISD::SMULO || Opc == ISD::UMULO) && | ||||
5707 | !Subtarget->isThumb1Only(); | ||||
5708 | if (LHS.getResNo() == 1 && (isOneConstant(RHS) || isNullConstant(RHS)) && | ||||
5709 | (Opc == ISD::SADDO || Opc == ISD::UADDO || Opc == ISD::SSUBO || | ||||
5710 | Opc == ISD::USUBO || OptimizeMul) && | ||||
5711 | (CC == ISD::SETEQ || CC == ISD::SETNE)) { | ||||
5712 | // Only lower legal XALUO ops. | ||||
5713 | if (!DAG.getTargetLoweringInfo().isTypeLegal(LHS->getValueType(0))) | ||||
5714 | return SDValue(); | ||||
5715 | |||||
5716 | // The actual operation with overflow check. | ||||
5717 | SDValue Value, OverflowCmp; | ||||
5718 | SDValue ARMcc; | ||||
5719 | std::tie(Value, OverflowCmp) = getARMXALUOOp(LHS.getValue(0), DAG, ARMcc); | ||||
5720 | |||||
5721 | if ((CC == ISD::SETNE) != isOneConstant(RHS)) { | ||||
5722 | // Reverse the condition code. | ||||
5723 | ARMCC::CondCodes CondCode = | ||||
5724 | (ARMCC::CondCodes)cast<const ConstantSDNode>(ARMcc)->getZExtValue(); | ||||
5725 | CondCode = ARMCC::getOppositeCondition(CondCode); | ||||
5726 | ARMcc = DAG.getConstant(CondCode, SDLoc(ARMcc), MVT::i32); | ||||
5727 | } | ||||
5728 | SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32); | ||||
5729 | |||||
5730 | return DAG.getNode(ARMISD::BRCOND, dl, MVT::Other, Chain, Dest, ARMcc, CCR, | ||||
5731 | OverflowCmp); | ||||
5732 | } | ||||
5733 | |||||
5734 | if (LHS.getValueType() == MVT::i32) { | ||||
5735 | SDValue ARMcc; | ||||
5736 | SDValue Cmp = getARMCmp(LHS, RHS, CC, ARMcc, DAG, dl); | ||||
5737 | SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32); | ||||
5738 | return DAG.getNode(ARMISD::BRCOND, dl, MVT::Other, | ||||
5739 | Chain, Dest, ARMcc, CCR, Cmp); | ||||
5740 | } | ||||
5741 | |||||
5742 | if (getTargetMachine().Options.UnsafeFPMath && | ||||
5743 | (CC == ISD::SETEQ || CC == ISD::SETOEQ || | ||||
5744 | CC == ISD::SETNE || CC == ISD::SETUNE)) { | ||||
5745 | if (SDValue Result = OptimizeVFPBrcond(Op, DAG)) | ||||
5746 | return Result; | ||||
5747 | } | ||||
5748 | |||||
5749 | ARMCC::CondCodes CondCode, CondCode2; | ||||
5750 | FPCCToARMCC(CC, CondCode, CondCode2); | ||||
5751 | |||||
5752 | SDValue ARMcc = DAG.getConstant(CondCode, dl, MVT::i32); | ||||
5753 | SDValue Cmp = getVFPCmp(LHS, RHS, DAG, dl); | ||||
5754 | SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32); | ||||
5755 | SDVTList VTList = DAG.getVTList(MVT::Other, MVT::Glue); | ||||
5756 | SDValue Ops[] = { Chain, Dest, ARMcc, CCR, Cmp }; | ||||
5757 | SDValue Res = DAG.getNode(ARMISD::BRCOND, dl, VTList, Ops); | ||||
5758 | if (CondCode2 != ARMCC::AL) { | ||||
5759 | ARMcc = DAG.getConstant(CondCode2, dl, MVT::i32); | ||||
5760 | SDValue Ops[] = { Res, Dest, ARMcc, CCR, Res.getValue(1) }; | ||||
5761 | Res = DAG.getNode(ARMISD::BRCOND, dl, VTList, Ops); | ||||
5762 | } | ||||
5763 | return Res; | ||||
5764 | } | ||||
5765 | |||||
5766 | SDValue ARMTargetLowering::LowerBR_JT(SDValue Op, SelectionDAG &DAG) const { | ||||
5767 | SDValue Chain = Op.getOperand(0); | ||||
5768 | SDValue Table = Op.getOperand(1); | ||||
5769 | SDValue Index = Op.getOperand(2); | ||||
5770 | SDLoc dl(Op); | ||||
5771 | |||||
5772 | EVT PTy = getPointerTy(DAG.getDataLayout()); | ||||
5773 | JumpTableSDNode *JT = cast<JumpTableSDNode>(Table); | ||||
5774 | SDValue JTI = DAG.getTargetJumpTable(JT->getIndex(), PTy); | ||||
5775 | Table = DAG.getNode(ARMISD::WrapperJT, dl, MVT::i32, JTI); | ||||
5776 | Index = DAG.getNode(ISD::MUL, dl, PTy, Index, DAG.getConstant(4, dl, PTy)); | ||||
5777 | SDValue Addr = DAG.getNode(ISD::ADD, dl, PTy, Table, Index); | ||||
5778 | if (Subtarget->isThumb2() || (Subtarget->hasV8MBaselineOps() && Subtarget->isThumb())) { | ||||
5779 | // Thumb2 and ARMv8-M use a two-level jump. That is, it jumps into the jump table | ||||
5780 | // which does another jump to the destination. This also makes it easier | ||||
5781 | // to translate it to TBB / TBH later (Thumb2 only). | ||||
5782 | // FIXME: This might not work if the function is extremely large. | ||||
5783 | return DAG.getNode(ARMISD::BR2_JT, dl, MVT::Other, Chain, | ||||
5784 | Addr, Op.getOperand(2), JTI); | ||||
5785 | } | ||||
5786 | if (isPositionIndependent() || Subtarget->isROPI()) { | ||||
5787 | Addr = | ||||
5788 | DAG.getLoad((EVT)MVT::i32, dl, Chain, Addr, | ||||
5789 | MachinePointerInfo::getJumpTable(DAG.getMachineFunction())); | ||||
5790 | Chain = Addr.getValue(1); | ||||
5791 | Addr = DAG.getNode(ISD::ADD, dl, PTy, Table, Addr); | ||||
5792 | return DAG.getNode(ARMISD::BR_JT, dl, MVT::Other, Chain, Addr, JTI); | ||||
5793 | } else { | ||||
5794 | Addr = | ||||
5795 | DAG.getLoad(PTy, dl, Chain, Addr, | ||||
5796 | MachinePointerInfo::getJumpTable(DAG.getMachineFunction())); | ||||
5797 | Chain = Addr.getValue(1); | ||||
5798 | return DAG.getNode(ARMISD::BR_JT, dl, MVT::Other, Chain, Addr, JTI); | ||||
5799 | } | ||||
5800 | } | ||||
5801 | |||||
5802 | static SDValue LowerVectorFP_TO_INT(SDValue Op, SelectionDAG &DAG) { | ||||
5803 | EVT VT = Op.getValueType(); | ||||
5804 | SDLoc dl(Op); | ||||
5805 | |||||
5806 | if (Op.getValueType().getVectorElementType() == MVT::i32) { | ||||
5807 | if (Op.getOperand(0).getValueType().getVectorElementType() == MVT::f32) | ||||
5808 | return Op; | ||||
5809 | return DAG.UnrollVectorOp(Op.getNode()); | ||||
5810 | } | ||||
5811 | |||||
5812 | const bool HasFullFP16 = | ||||
5813 | static_cast<const ARMSubtarget&>(DAG.getSubtarget()).hasFullFP16(); | ||||
5814 | |||||
5815 | EVT NewTy; | ||||
5816 | const EVT OpTy = Op.getOperand(0).getValueType(); | ||||
5817 | if (OpTy == MVT::v4f32) | ||||
5818 | NewTy = MVT::v4i32; | ||||
5819 | else if (OpTy == MVT::v4f16 && HasFullFP16) | ||||
5820 | NewTy = MVT::v4i16; | ||||
5821 | else if (OpTy == MVT::v8f16 && HasFullFP16) | ||||
5822 | NewTy = MVT::v8i16; | ||||
5823 | else | ||||
5824 | llvm_unreachable("Invalid type for custom lowering!")::llvm::llvm_unreachable_internal("Invalid type for custom lowering!" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 5824); | ||||
5825 | |||||
5826 | if (VT != MVT::v4i16 && VT != MVT::v8i16) | ||||
5827 | return DAG.UnrollVectorOp(Op.getNode()); | ||||
5828 | |||||
5829 | Op = DAG.getNode(Op.getOpcode(), dl, NewTy, Op.getOperand(0)); | ||||
5830 | return DAG.getNode(ISD::TRUNCATE, dl, VT, Op); | ||||
5831 | } | ||||
5832 | |||||
5833 | SDValue ARMTargetLowering::LowerFP_TO_INT(SDValue Op, SelectionDAG &DAG) const { | ||||
5834 | EVT VT = Op.getValueType(); | ||||
5835 | if (VT.isVector()) | ||||
5836 | return LowerVectorFP_TO_INT(Op, DAG); | ||||
5837 | |||||
5838 | bool IsStrict = Op->isStrictFPOpcode(); | ||||
5839 | SDValue SrcVal = Op.getOperand(IsStrict ? 1 : 0); | ||||
5840 | |||||
5841 | if (isUnsupportedFloatingType(SrcVal.getValueType())) { | ||||
5842 | RTLIB::Libcall LC; | ||||
5843 | if (Op.getOpcode() == ISD::FP_TO_SINT || | ||||
5844 | Op.getOpcode() == ISD::STRICT_FP_TO_SINT) | ||||
5845 | LC = RTLIB::getFPTOSINT(SrcVal.getValueType(), | ||||
5846 | Op.getValueType()); | ||||
5847 | else | ||||
5848 | LC = RTLIB::getFPTOUINT(SrcVal.getValueType(), | ||||
5849 | Op.getValueType()); | ||||
5850 | SDLoc Loc(Op); | ||||
5851 | MakeLibCallOptions CallOptions; | ||||
5852 | SDValue Chain = IsStrict ? Op.getOperand(0) : SDValue(); | ||||
5853 | SDValue Result; | ||||
5854 | std::tie(Result, Chain) = makeLibCall(DAG, LC, Op.getValueType(), SrcVal, | ||||
5855 | CallOptions, Loc, Chain); | ||||
5856 | return IsStrict ? DAG.getMergeValues({Result, Chain}, Loc) : Result; | ||||
5857 | } | ||||
5858 | |||||
5859 | // FIXME: Remove this when we have strict fp instruction selection patterns | ||||
5860 | if (IsStrict) { | ||||
5861 | SDLoc Loc(Op); | ||||
5862 | SDValue Result = | ||||
5863 | DAG.getNode(Op.getOpcode() == ISD::STRICT_FP_TO_SINT ? ISD::FP_TO_SINT | ||||
5864 | : ISD::FP_TO_UINT, | ||||
5865 | Loc, Op.getValueType(), SrcVal); | ||||
5866 | return DAG.getMergeValues({Result, Op.getOperand(0)}, Loc); | ||||
5867 | } | ||||
5868 | |||||
5869 | return Op; | ||||
5870 | } | ||||
5871 | |||||
5872 | static SDValue LowerFP_TO_INT_SAT(SDValue Op, SelectionDAG &DAG, | ||||
5873 | const ARMSubtarget *Subtarget) { | ||||
5874 | EVT VT = Op.getValueType(); | ||||
5875 | EVT ToVT = cast<VTSDNode>(Op.getOperand(1))->getVT(); | ||||
5876 | EVT FromVT = Op.getOperand(0).getValueType(); | ||||
5877 | |||||
5878 | if (VT == MVT::i32 && ToVT == MVT::i32 && FromVT == MVT::f32) | ||||
5879 | return Op; | ||||
5880 | if (VT == MVT::i32 && ToVT == MVT::i32 && FromVT == MVT::f64 && | ||||
5881 | Subtarget->hasFP64()) | ||||
5882 | return Op; | ||||
5883 | if (VT == MVT::i32 && ToVT == MVT::i32 && FromVT == MVT::f16 && | ||||
5884 | Subtarget->hasFullFP16()) | ||||
5885 | return Op; | ||||
5886 | if (VT == MVT::v4i32 && ToVT == MVT::i32 && FromVT == MVT::v4f32 && | ||||
5887 | Subtarget->hasMVEFloatOps()) | ||||
5888 | return Op; | ||||
5889 | if (VT == MVT::v8i16 && ToVT == MVT::i16 && FromVT == MVT::v8f16 && | ||||
5890 | Subtarget->hasMVEFloatOps()) | ||||
5891 | return Op; | ||||
5892 | |||||
5893 | if (FromVT != MVT::v4f32 && FromVT != MVT::v8f16) | ||||
5894 | return SDValue(); | ||||
5895 | |||||
5896 | SDLoc DL(Op); | ||||
5897 | bool IsSigned = Op.getOpcode() == ISD::FP_TO_SINT_SAT; | ||||
5898 | unsigned BW = ToVT.getScalarSizeInBits() - IsSigned; | ||||
5899 | SDValue CVT = DAG.getNode(Op.getOpcode(), DL, VT, Op.getOperand(0), | ||||
5900 | DAG.getValueType(VT.getScalarType())); | ||||
5901 | SDValue Max = DAG.getNode(IsSigned ? ISD::SMIN : ISD::UMIN, DL, VT, CVT, | ||||
5902 | DAG.getConstant((1 << BW) - 1, DL, VT)); | ||||
5903 | if (IsSigned) | ||||
5904 | Max = DAG.getNode(ISD::SMAX, DL, VT, Max, | ||||
5905 | DAG.getConstant(-(1 << BW), DL, VT)); | ||||
5906 | return Max; | ||||
5907 | } | ||||
5908 | |||||
5909 | static SDValue LowerVectorINT_TO_FP(SDValue Op, SelectionDAG &DAG) { | ||||
5910 | EVT VT = Op.getValueType(); | ||||
5911 | SDLoc dl(Op); | ||||
5912 | |||||
5913 | if (Op.getOperand(0).getValueType().getVectorElementType() == MVT::i32) { | ||||
5914 | if (VT.getVectorElementType() == MVT::f32) | ||||
5915 | return Op; | ||||
5916 | return DAG.UnrollVectorOp(Op.getNode()); | ||||
5917 | } | ||||
5918 | |||||
5919 | assert((Op.getOperand(0).getValueType() == MVT::v4i16 ||(static_cast <bool> ((Op.getOperand(0).getValueType() == MVT::v4i16 || Op.getOperand(0).getValueType() == MVT::v8i16) && "Invalid type for custom lowering!") ? void (0) : __assert_fail ("(Op.getOperand(0).getValueType() == MVT::v4i16 || Op.getOperand(0).getValueType() == MVT::v8i16) && \"Invalid type for custom lowering!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 5921, __extension__ __PRETTY_FUNCTION__)) | ||||
5920 | Op.getOperand(0).getValueType() == MVT::v8i16) &&(static_cast <bool> ((Op.getOperand(0).getValueType() == MVT::v4i16 || Op.getOperand(0).getValueType() == MVT::v8i16) && "Invalid type for custom lowering!") ? void (0) : __assert_fail ("(Op.getOperand(0).getValueType() == MVT::v4i16 || Op.getOperand(0).getValueType() == MVT::v8i16) && \"Invalid type for custom lowering!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 5921, __extension__ __PRETTY_FUNCTION__)) | ||||
5921 | "Invalid type for custom lowering!")(static_cast <bool> ((Op.getOperand(0).getValueType() == MVT::v4i16 || Op.getOperand(0).getValueType() == MVT::v8i16) && "Invalid type for custom lowering!") ? void (0) : __assert_fail ("(Op.getOperand(0).getValueType() == MVT::v4i16 || Op.getOperand(0).getValueType() == MVT::v8i16) && \"Invalid type for custom lowering!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 5921, __extension__ __PRETTY_FUNCTION__)); | ||||
5922 | |||||
5923 | const bool HasFullFP16 = | ||||
5924 | static_cast<const ARMSubtarget&>(DAG.getSubtarget()).hasFullFP16(); | ||||
5925 | |||||
5926 | EVT DestVecType; | ||||
5927 | if (VT == MVT::v4f32) | ||||
5928 | DestVecType = MVT::v4i32; | ||||
5929 | else if (VT == MVT::v4f16 && HasFullFP16) | ||||
5930 | DestVecType = MVT::v4i16; | ||||
5931 | else if (VT == MVT::v8f16 && HasFullFP16) | ||||
5932 | DestVecType = MVT::v8i16; | ||||
5933 | else | ||||
5934 | return DAG.UnrollVectorOp(Op.getNode()); | ||||
5935 | |||||
5936 | unsigned CastOpc; | ||||
5937 | unsigned Opc; | ||||
5938 | switch (Op.getOpcode()) { | ||||
5939 | default: llvm_unreachable("Invalid opcode!")::llvm::llvm_unreachable_internal("Invalid opcode!", "llvm/lib/Target/ARM/ARMISelLowering.cpp" , 5939); | ||||
5940 | case ISD::SINT_TO_FP: | ||||
5941 | CastOpc = ISD::SIGN_EXTEND; | ||||
5942 | Opc = ISD::SINT_TO_FP; | ||||
5943 | break; | ||||
5944 | case ISD::UINT_TO_FP: | ||||
5945 | CastOpc = ISD::ZERO_EXTEND; | ||||
5946 | Opc = ISD::UINT_TO_FP; | ||||
5947 | break; | ||||
5948 | } | ||||
5949 | |||||
5950 | Op = DAG.getNode(CastOpc, dl, DestVecType, Op.getOperand(0)); | ||||
5951 | return DAG.getNode(Opc, dl, VT, Op); | ||||
5952 | } | ||||
5953 | |||||
5954 | SDValue ARMTargetLowering::LowerINT_TO_FP(SDValue Op, SelectionDAG &DAG) const { | ||||
5955 | EVT VT = Op.getValueType(); | ||||
5956 | if (VT.isVector()) | ||||
5957 | return LowerVectorINT_TO_FP(Op, DAG); | ||||
5958 | if (isUnsupportedFloatingType(VT)) { | ||||
5959 | RTLIB::Libcall LC; | ||||
5960 | if (Op.getOpcode() == ISD::SINT_TO_FP) | ||||
5961 | LC = RTLIB::getSINTTOFP(Op.getOperand(0).getValueType(), | ||||
5962 | Op.getValueType()); | ||||
5963 | else | ||||
5964 | LC = RTLIB::getUINTTOFP(Op.getOperand(0).getValueType(), | ||||
5965 | Op.getValueType()); | ||||
5966 | MakeLibCallOptions CallOptions; | ||||
5967 | return makeLibCall(DAG, LC, Op.getValueType(), Op.getOperand(0), | ||||
5968 | CallOptions, SDLoc(Op)).first; | ||||
5969 | } | ||||
5970 | |||||
5971 | return Op; | ||||
5972 | } | ||||
5973 | |||||
5974 | SDValue ARMTargetLowering::LowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG) const { | ||||
5975 | // Implement fcopysign with a fabs and a conditional fneg. | ||||
5976 | SDValue Tmp0 = Op.getOperand(0); | ||||
5977 | SDValue Tmp1 = Op.getOperand(1); | ||||
5978 | SDLoc dl(Op); | ||||
5979 | EVT VT = Op.getValueType(); | ||||
5980 | EVT SrcVT = Tmp1.getValueType(); | ||||
5981 | bool InGPR = Tmp0.getOpcode() == ISD::BITCAST || | ||||
5982 | Tmp0.getOpcode() == ARMISD::VMOVDRR; | ||||
5983 | bool UseNEON = !InGPR && Subtarget->hasNEON(); | ||||
5984 | |||||
5985 | if (UseNEON) { | ||||
5986 | // Use VBSL to copy the sign bit. | ||||
5987 | unsigned EncodedVal = ARM_AM::createVMOVModImm(0x6, 0x80); | ||||
5988 | SDValue Mask = DAG.getNode(ARMISD::VMOVIMM, dl, MVT::v2i32, | ||||
5989 | DAG.getTargetConstant(EncodedVal, dl, MVT::i32)); | ||||
5990 | EVT OpVT = (VT == MVT::f32) ? MVT::v2i32 : MVT::v1i64; | ||||
5991 | if (VT == MVT::f64) | ||||
5992 | Mask = DAG.getNode(ARMISD::VSHLIMM, dl, OpVT, | ||||
5993 | DAG.getNode(ISD::BITCAST, dl, OpVT, Mask), | ||||
5994 | DAG.getConstant(32, dl, MVT::i32)); | ||||
5995 | else /*if (VT == MVT::f32)*/ | ||||
5996 | Tmp0 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2f32, Tmp0); | ||||
5997 | if (SrcVT == MVT::f32) { | ||||
5998 | Tmp1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2f32, Tmp1); | ||||
5999 | if (VT == MVT::f64) | ||||
6000 | Tmp1 = DAG.getNode(ARMISD::VSHLIMM, dl, OpVT, | ||||
6001 | DAG.getNode(ISD::BITCAST, dl, OpVT, Tmp1), | ||||
6002 | DAG.getConstant(32, dl, MVT::i32)); | ||||
6003 | } else if (VT == MVT::f32) | ||||
6004 | Tmp1 = DAG.getNode(ARMISD::VSHRuIMM, dl, MVT::v1i64, | ||||
6005 | DAG.getNode(ISD::BITCAST, dl, MVT::v1i64, Tmp1), | ||||
6006 | DAG.getConstant(32, dl, MVT::i32)); | ||||
6007 | Tmp0 = DAG.getNode(ISD::BITCAST, dl, OpVT, Tmp0); | ||||
6008 | Tmp1 = DAG.getNode(ISD::BITCAST, dl, OpVT, Tmp1); | ||||
6009 | |||||
6010 | SDValue AllOnes = DAG.getTargetConstant(ARM_AM::createVMOVModImm(0xe, 0xff), | ||||
6011 | dl, MVT::i32); | ||||
6012 | AllOnes = DAG.getNode(ARMISD::VMOVIMM, dl, MVT::v8i8, AllOnes); | ||||
6013 | SDValue MaskNot = DAG.getNode(ISD::XOR, dl, OpVT, Mask, | ||||
6014 | DAG.getNode(ISD::BITCAST, dl, OpVT, AllOnes)); | ||||
6015 | |||||
6016 | SDValue Res = DAG.getNode(ISD::OR, dl, OpVT, | ||||
6017 | DAG.getNode(ISD::AND, dl, OpVT, Tmp1, Mask), | ||||
6018 | DAG.getNode(ISD::AND, dl, OpVT, Tmp0, MaskNot)); | ||||
6019 | if (VT == MVT::f32) { | ||||
6020 | Res = DAG.getNode(ISD::BITCAST, dl, MVT::v2f32, Res); | ||||
6021 | Res = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f32, Res, | ||||
6022 | DAG.getConstant(0, dl, MVT::i32)); | ||||
6023 | } else { | ||||
6024 | Res = DAG.getNode(ISD::BITCAST, dl, MVT::f64, Res); | ||||
6025 | } | ||||
6026 | |||||
6027 | return Res; | ||||
6028 | } | ||||
6029 | |||||
6030 | // Bitcast operand 1 to i32. | ||||
6031 | if (SrcVT == MVT::f64) | ||||
6032 | Tmp1 = DAG.getNode(ARMISD::VMOVRRD, dl, DAG.getVTList(MVT::i32, MVT::i32), | ||||
6033 | Tmp1).getValue(1); | ||||
6034 | Tmp1 = DAG.getNode(ISD::BITCAST, dl, MVT::i32, Tmp1); | ||||
6035 | |||||
6036 | // Or in the signbit with integer operations. | ||||
6037 | SDValue Mask1 = DAG.getConstant(0x80000000, dl, MVT::i32); | ||||
6038 | SDValue Mask2 = DAG.getConstant(0x7fffffff, dl, MVT::i32); | ||||
6039 | Tmp1 = DAG.getNode(ISD::AND, dl, MVT::i32, Tmp1, Mask1); | ||||
6040 | if (VT == MVT::f32) { | ||||
6041 | Tmp0 = DAG.getNode(ISD::AND, dl, MVT::i32, | ||||
6042 | DAG.getNode(ISD::BITCAST, dl, MVT::i32, Tmp0), Mask2); | ||||
6043 | return DAG.getNode(ISD::BITCAST, dl, MVT::f32, | ||||
6044 | DAG.getNode(ISD::OR, dl, MVT::i32, Tmp0, Tmp1)); | ||||
6045 | } | ||||
6046 | |||||
6047 | // f64: Or the high part with signbit and then combine two parts. | ||||
6048 | Tmp0 = DAG.getNode(ARMISD::VMOVRRD, dl, DAG.getVTList(MVT::i32, MVT::i32), | ||||
6049 | Tmp0); | ||||
6050 | SDValue Lo = Tmp0.getValue(0); | ||||
6051 | SDValue Hi = DAG.getNode(ISD::AND, dl, MVT::i32, Tmp0.getValue(1), Mask2); | ||||
6052 | Hi = DAG.getNode(ISD::OR, dl, MVT::i32, Hi, Tmp1); | ||||
6053 | return DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Lo, Hi); | ||||
6054 | } | ||||
6055 | |||||
6056 | SDValue ARMTargetLowering::LowerRETURNADDR(SDValue Op, SelectionDAG &DAG) const{ | ||||
6057 | MachineFunction &MF = DAG.getMachineFunction(); | ||||
6058 | MachineFrameInfo &MFI = MF.getFrameInfo(); | ||||
6059 | MFI.setReturnAddressIsTaken(true); | ||||
6060 | |||||
6061 | if (verifyReturnAddressArgumentIsConstant(Op, DAG)) | ||||
6062 | return SDValue(); | ||||
6063 | |||||
6064 | EVT VT = Op.getValueType(); | ||||
6065 | SDLoc dl(Op); | ||||
6066 | unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue(); | ||||
6067 | if (Depth) { | ||||
6068 | SDValue FrameAddr = LowerFRAMEADDR(Op, DAG); | ||||
6069 | SDValue Offset = DAG.getConstant(4, dl, MVT::i32); | ||||
6070 | return DAG.getLoad(VT, dl, DAG.getEntryNode(), | ||||
6071 | DAG.getNode(ISD::ADD, dl, VT, FrameAddr, Offset), | ||||
6072 | MachinePointerInfo()); | ||||
6073 | } | ||||
6074 | |||||
6075 | // Return LR, which contains the return address. Mark it an implicit live-in. | ||||
6076 | Register Reg = MF.addLiveIn(ARM::LR, getRegClassFor(MVT::i32)); | ||||
6077 | return DAG.getCopyFromReg(DAG.getEntryNode(), dl, Reg, VT); | ||||
6078 | } | ||||
6079 | |||||
6080 | SDValue ARMTargetLowering::LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const { | ||||
6081 | const ARMBaseRegisterInfo &ARI = | ||||
6082 | *static_cast<const ARMBaseRegisterInfo*>(RegInfo); | ||||
6083 | MachineFunction &MF = DAG.getMachineFunction(); | ||||
6084 | MachineFrameInfo &MFI = MF.getFrameInfo(); | ||||
6085 | MFI.setFrameAddressIsTaken(true); | ||||
6086 | |||||
6087 | EVT VT = Op.getValueType(); | ||||
6088 | SDLoc dl(Op); // FIXME probably not meaningful | ||||
6089 | unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue(); | ||||
6090 | Register FrameReg = ARI.getFrameRegister(MF); | ||||
6091 | SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, FrameReg, VT); | ||||
6092 | while (Depth--) | ||||
6093 | FrameAddr = DAG.getLoad(VT, dl, DAG.getEntryNode(), FrameAddr, | ||||
6094 | MachinePointerInfo()); | ||||
6095 | return FrameAddr; | ||||
6096 | } | ||||
6097 | |||||
6098 | // FIXME? Maybe this could be a TableGen attribute on some registers and | ||||
6099 | // this table could be generated automatically from RegInfo. | ||||
6100 | Register ARMTargetLowering::getRegisterByName(const char* RegName, LLT VT, | ||||
6101 | const MachineFunction &MF) const { | ||||
6102 | Register Reg = StringSwitch<unsigned>(RegName) | ||||
6103 | .Case("sp", ARM::SP) | ||||
6104 | .Default(0); | ||||
6105 | if (Reg) | ||||
6106 | return Reg; | ||||
6107 | report_fatal_error(Twine("Invalid register name \"" | ||||
6108 | + StringRef(RegName) + "\".")); | ||||
6109 | } | ||||
6110 | |||||
6111 | // Result is 64 bit value so split into two 32 bit values and return as a | ||||
6112 | // pair of values. | ||||
6113 | static void ExpandREAD_REGISTER(SDNode *N, SmallVectorImpl<SDValue> &Results, | ||||
6114 | SelectionDAG &DAG) { | ||||
6115 | SDLoc DL(N); | ||||
6116 | |||||
6117 | // This function is only supposed to be called for i64 type destination. | ||||
6118 | assert(N->getValueType(0) == MVT::i64(static_cast <bool> (N->getValueType(0) == MVT::i64 && "ExpandREAD_REGISTER called for non-i64 type result.") ? void (0) : __assert_fail ("N->getValueType(0) == MVT::i64 && \"ExpandREAD_REGISTER called for non-i64 type result.\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 6119, __extension__ __PRETTY_FUNCTION__)) | ||||
6119 | && "ExpandREAD_REGISTER called for non-i64 type result.")(static_cast <bool> (N->getValueType(0) == MVT::i64 && "ExpandREAD_REGISTER called for non-i64 type result.") ? void (0) : __assert_fail ("N->getValueType(0) == MVT::i64 && \"ExpandREAD_REGISTER called for non-i64 type result.\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 6119, __extension__ __PRETTY_FUNCTION__)); | ||||
6120 | |||||
6121 | SDValue Read = DAG.getNode(ISD::READ_REGISTER, DL, | ||||
6122 | DAG.getVTList(MVT::i32, MVT::i32, MVT::Other), | ||||
6123 | N->getOperand(0), | ||||
6124 | N->getOperand(1)); | ||||
6125 | |||||
6126 | Results.push_back(DAG.getNode(ISD::BUILD_PAIR, DL, MVT::i64, Read.getValue(0), | ||||
6127 | Read.getValue(1))); | ||||
6128 | Results.push_back(Read.getOperand(0)); | ||||
6129 | } | ||||
6130 | |||||
6131 | /// \p BC is a bitcast that is about to be turned into a VMOVDRR. | ||||
6132 | /// When \p DstVT, the destination type of \p BC, is on the vector | ||||
6133 | /// register bank and the source of bitcast, \p Op, operates on the same bank, | ||||
6134 | /// it might be possible to combine them, such that everything stays on the | ||||
6135 | /// vector register bank. | ||||
6136 | /// \p return The node that would replace \p BT, if the combine | ||||
6137 | /// is possible. | ||||
6138 | static SDValue CombineVMOVDRRCandidateWithVecOp(const SDNode *BC, | ||||
6139 | SelectionDAG &DAG) { | ||||
6140 | SDValue Op = BC->getOperand(0); | ||||
6141 | EVT DstVT = BC->getValueType(0); | ||||
6142 | |||||
6143 | // The only vector instruction that can produce a scalar (remember, | ||||
6144 | // since the bitcast was about to be turned into VMOVDRR, the source | ||||
6145 | // type is i64) from a vector is EXTRACT_VECTOR_ELT. | ||||
6146 | // Moreover, we can do this combine only if there is one use. | ||||
6147 | // Finally, if the destination type is not a vector, there is not | ||||
6148 | // much point on forcing everything on the vector bank. | ||||
6149 | if (!DstVT.isVector() || Op.getOpcode() != ISD::EXTRACT_VECTOR_ELT || | ||||
6150 | !Op.hasOneUse()) | ||||
6151 | return SDValue(); | ||||
6152 | |||||
6153 | // If the index is not constant, we will introduce an additional | ||||
6154 | // multiply that will stick. | ||||
6155 | // Give up in that case. | ||||
6156 | ConstantSDNode *Index = dyn_cast<ConstantSDNode>(Op.getOperand(1)); | ||||
6157 | if (!Index) | ||||
6158 | return SDValue(); | ||||
6159 | unsigned DstNumElt = DstVT.getVectorNumElements(); | ||||
6160 | |||||
6161 | // Compute the new index. | ||||
6162 | const APInt &APIntIndex = Index->getAPIntValue(); | ||||
6163 | APInt NewIndex(APIntIndex.getBitWidth(), DstNumElt); | ||||
6164 | NewIndex *= APIntIndex; | ||||
6165 | // Check if the new constant index fits into i32. | ||||
6166 | if (NewIndex.getBitWidth() > 32) | ||||
6167 | return SDValue(); | ||||
6168 | |||||
6169 | // vMTy bitcast(i64 extractelt vNi64 src, i32 index) -> | ||||
6170 | // vMTy extractsubvector vNxMTy (bitcast vNi64 src), i32 index*M) | ||||
6171 | SDLoc dl(Op); | ||||
6172 | SDValue ExtractSrc = Op.getOperand(0); | ||||
6173 | EVT VecVT = EVT::getVectorVT( | ||||
6174 | *DAG.getContext(), DstVT.getScalarType(), | ||||
6175 | ExtractSrc.getValueType().getVectorNumElements() * DstNumElt); | ||||
6176 | SDValue BitCast = DAG.getNode(ISD::BITCAST, dl, VecVT, ExtractSrc); | ||||
6177 | return DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, DstVT, BitCast, | ||||
6178 | DAG.getConstant(NewIndex.getZExtValue(), dl, MVT::i32)); | ||||
6179 | } | ||||
6180 | |||||
6181 | /// ExpandBITCAST - If the target supports VFP, this function is called to | ||||
6182 | /// expand a bit convert where either the source or destination type is i64 to | ||||
6183 | /// use a VMOVDRR or VMOVRRD node. This should not be done when the non-i64 | ||||
6184 | /// operand type is illegal (e.g., v2f32 for a target that doesn't support | ||||
6185 | /// vectors), since the legalizer won't know what to do with that. | ||||
6186 | SDValue ARMTargetLowering::ExpandBITCAST(SDNode *N, SelectionDAG &DAG, | ||||
6187 | const ARMSubtarget *Subtarget) const { | ||||
6188 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | ||||
6189 | SDLoc dl(N); | ||||
6190 | SDValue Op = N->getOperand(0); | ||||
6191 | |||||
6192 | // This function is only supposed to be called for i16 and i64 types, either | ||||
6193 | // as the source or destination of the bit convert. | ||||
6194 | EVT SrcVT = Op.getValueType(); | ||||
6195 | EVT DstVT = N->getValueType(0); | ||||
6196 | |||||
6197 | if ((SrcVT == MVT::i16 || SrcVT == MVT::i32) && | ||||
6198 | (DstVT == MVT::f16 || DstVT == MVT::bf16)) | ||||
6199 | return MoveToHPR(SDLoc(N), DAG, MVT::i32, DstVT.getSimpleVT(), | ||||
6200 | DAG.getNode(ISD::ZERO_EXTEND, SDLoc(N), MVT::i32, Op)); | ||||
6201 | |||||
6202 | if ((DstVT == MVT::i16 || DstVT == MVT::i32) && | ||||
6203 | (SrcVT == MVT::f16 || SrcVT == MVT::bf16)) | ||||
6204 | return DAG.getNode( | ||||
6205 | ISD::TRUNCATE, SDLoc(N), DstVT, | ||||
6206 | MoveFromHPR(SDLoc(N), DAG, MVT::i32, SrcVT.getSimpleVT(), Op)); | ||||
6207 | |||||
6208 | if (!(SrcVT == MVT::i64 || DstVT == MVT::i64)) | ||||
6209 | return SDValue(); | ||||
6210 | |||||
6211 | // Turn i64->f64 into VMOVDRR. | ||||
6212 | if (SrcVT == MVT::i64 && TLI.isTypeLegal(DstVT)) { | ||||
6213 | // Do not force values to GPRs (this is what VMOVDRR does for the inputs) | ||||
6214 | // if we can combine the bitcast with its source. | ||||
6215 | if (SDValue Val = CombineVMOVDRRCandidateWithVecOp(N, DAG)) | ||||
6216 | return Val; | ||||
6217 | |||||
6218 | SDValue Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, Op, | ||||
6219 | DAG.getConstant(0, dl, MVT::i32)); | ||||
6220 | SDValue Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, Op, | ||||
6221 | DAG.getConstant(1, dl, MVT::i32)); | ||||
6222 | return DAG.getNode(ISD::BITCAST, dl, DstVT, | ||||
6223 | DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Lo, Hi)); | ||||
6224 | } | ||||
6225 | |||||
6226 | // Turn f64->i64 into VMOVRRD. | ||||
6227 | if (DstVT == MVT::i64 && TLI.isTypeLegal(SrcVT)) { | ||||
6228 | SDValue Cvt; | ||||
6229 | if (DAG.getDataLayout().isBigEndian() && SrcVT.isVector() && | ||||
6230 | SrcVT.getVectorNumElements() > 1) | ||||
6231 | Cvt = DAG.getNode(ARMISD::VMOVRRD, dl, | ||||
6232 | DAG.getVTList(MVT::i32, MVT::i32), | ||||
6233 | DAG.getNode(ARMISD::VREV64, dl, SrcVT, Op)); | ||||
6234 | else | ||||
6235 | Cvt = DAG.getNode(ARMISD::VMOVRRD, dl, | ||||
6236 | DAG.getVTList(MVT::i32, MVT::i32), Op); | ||||
6237 | // Merge the pieces into a single i64 value. | ||||
6238 | return DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Cvt, Cvt.getValue(1)); | ||||
6239 | } | ||||
6240 | |||||
6241 | return SDValue(); | ||||
6242 | } | ||||
6243 | |||||
6244 | /// getZeroVector - Returns a vector of specified type with all zero elements. | ||||
6245 | /// Zero vectors are used to represent vector negation and in those cases | ||||
6246 | /// will be implemented with the NEON VNEG instruction. However, VNEG does | ||||
6247 | /// not support i64 elements, so sometimes the zero vectors will need to be | ||||
6248 | /// explicitly constructed. Regardless, use a canonical VMOV to create the | ||||
6249 | /// zero vector. | ||||
6250 | static SDValue getZeroVector(EVT VT, SelectionDAG &DAG, const SDLoc &dl) { | ||||
6251 | assert(VT.isVector() && "Expected a vector type")(static_cast <bool> (VT.isVector() && "Expected a vector type" ) ? void (0) : __assert_fail ("VT.isVector() && \"Expected a vector type\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 6251, __extension__ __PRETTY_FUNCTION__)); | ||||
6252 | // The canonical modified immediate encoding of a zero vector is....0! | ||||
6253 | SDValue EncodedVal = DAG.getTargetConstant(0, dl, MVT::i32); | ||||
6254 | EVT VmovVT = VT.is128BitVector() ? MVT::v4i32 : MVT::v2i32; | ||||
6255 | SDValue Vmov = DAG.getNode(ARMISD::VMOVIMM, dl, VmovVT, EncodedVal); | ||||
6256 | return DAG.getNode(ISD::BITCAST, dl, VT, Vmov); | ||||
6257 | } | ||||
6258 | |||||
6259 | /// LowerShiftRightParts - Lower SRA_PARTS, which returns two | ||||
6260 | /// i32 values and take a 2 x i32 value to shift plus a shift amount. | ||||
6261 | SDValue ARMTargetLowering::LowerShiftRightParts(SDValue Op, | ||||
6262 | SelectionDAG &DAG) const { | ||||
6263 | assert(Op.getNumOperands() == 3 && "Not a double-shift!")(static_cast <bool> (Op.getNumOperands() == 3 && "Not a double-shift!") ? void (0) : __assert_fail ("Op.getNumOperands() == 3 && \"Not a double-shift!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 6263, __extension__ __PRETTY_FUNCTION__)); | ||||
6264 | EVT VT = Op.getValueType(); | ||||
6265 | unsigned VTBits = VT.getSizeInBits(); | ||||
6266 | SDLoc dl(Op); | ||||
6267 | SDValue ShOpLo = Op.getOperand(0); | ||||
6268 | SDValue ShOpHi = Op.getOperand(1); | ||||
6269 | SDValue ShAmt = Op.getOperand(2); | ||||
6270 | SDValue ARMcc; | ||||
6271 | SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32); | ||||
6272 | unsigned Opc = (Op.getOpcode() == ISD::SRA_PARTS) ? ISD::SRA : ISD::SRL; | ||||
6273 | |||||
6274 | assert(Op.getOpcode() == ISD::SRA_PARTS || Op.getOpcode() == ISD::SRL_PARTS)(static_cast <bool> (Op.getOpcode() == ISD::SRA_PARTS || Op.getOpcode() == ISD::SRL_PARTS) ? void (0) : __assert_fail ("Op.getOpcode() == ISD::SRA_PARTS || Op.getOpcode() == ISD::SRL_PARTS" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 6274, __extension__ __PRETTY_FUNCTION__)); | ||||
6275 | |||||
6276 | SDValue RevShAmt = DAG.getNode(ISD::SUB, dl, MVT::i32, | ||||
6277 | DAG.getConstant(VTBits, dl, MVT::i32), ShAmt); | ||||
6278 | SDValue Tmp1 = DAG.getNode(ISD::SRL, dl, VT, ShOpLo, ShAmt); | ||||
6279 | SDValue ExtraShAmt = DAG.getNode(ISD::SUB, dl, MVT::i32, ShAmt, | ||||
6280 | DAG.getConstant(VTBits, dl, MVT::i32)); | ||||
6281 | SDValue Tmp2 = DAG.getNode(ISD::SHL, dl, VT, ShOpHi, RevShAmt); | ||||
6282 | SDValue LoSmallShift = DAG.getNode(ISD::OR, dl, VT, Tmp1, Tmp2); | ||||
6283 | SDValue LoBigShift = DAG.getNode(Opc, dl, VT, ShOpHi, ExtraShAmt); | ||||
6284 | SDValue CmpLo = getARMCmp(ExtraShAmt, DAG.getConstant(0, dl, MVT::i32), | ||||
6285 | ISD::SETGE, ARMcc, DAG, dl); | ||||
6286 | SDValue Lo = DAG.getNode(ARMISD::CMOV, dl, VT, LoSmallShift, LoBigShift, | ||||
6287 | ARMcc, CCR, CmpLo); | ||||
6288 | |||||
6289 | SDValue HiSmallShift = DAG.getNode(Opc, dl, VT, ShOpHi, ShAmt); | ||||
6290 | SDValue HiBigShift = Opc == ISD::SRA | ||||
6291 | ? DAG.getNode(Opc, dl, VT, ShOpHi, | ||||
6292 | DAG.getConstant(VTBits - 1, dl, VT)) | ||||
6293 | : DAG.getConstant(0, dl, VT); | ||||
6294 | SDValue CmpHi = getARMCmp(ExtraShAmt, DAG.getConstant(0, dl, MVT::i32), | ||||
6295 | ISD::SETGE, ARMcc, DAG, dl); | ||||
6296 | SDValue Hi = DAG.getNode(ARMISD::CMOV, dl, VT, HiSmallShift, HiBigShift, | ||||
6297 | ARMcc, CCR, CmpHi); | ||||
6298 | |||||
6299 | SDValue Ops[2] = { Lo, Hi }; | ||||
6300 | return DAG.getMergeValues(Ops, dl); | ||||
6301 | } | ||||
6302 | |||||
6303 | /// LowerShiftLeftParts - Lower SHL_PARTS, which returns two | ||||
6304 | /// i32 values and take a 2 x i32 value to shift plus a shift amount. | ||||
6305 | SDValue ARMTargetLowering::LowerShiftLeftParts(SDValue Op, | ||||
6306 | SelectionDAG &DAG) const { | ||||
6307 | assert(Op.getNumOperands() == 3 && "Not a double-shift!")(static_cast <bool> (Op.getNumOperands() == 3 && "Not a double-shift!") ? void (0) : __assert_fail ("Op.getNumOperands() == 3 && \"Not a double-shift!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 6307, __extension__ __PRETTY_FUNCTION__)); | ||||
6308 | EVT VT = Op.getValueType(); | ||||
6309 | unsigned VTBits = VT.getSizeInBits(); | ||||
6310 | SDLoc dl(Op); | ||||
6311 | SDValue ShOpLo = Op.getOperand(0); | ||||
6312 | SDValue ShOpHi = Op.getOperand(1); | ||||
6313 | SDValue ShAmt = Op.getOperand(2); | ||||
6314 | SDValue ARMcc; | ||||
6315 | SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32); | ||||
6316 | |||||
6317 | assert(Op.getOpcode() == ISD::SHL_PARTS)(static_cast <bool> (Op.getOpcode() == ISD::SHL_PARTS) ? void (0) : __assert_fail ("Op.getOpcode() == ISD::SHL_PARTS" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 6317, __extension__ __PRETTY_FUNCTION__)); | ||||
6318 | SDValue RevShAmt = DAG.getNode(ISD::SUB, dl, MVT::i32, | ||||
6319 | DAG.getConstant(VTBits, dl, MVT::i32), ShAmt); | ||||
6320 | SDValue Tmp1 = DAG.getNode(ISD::SRL, dl, VT, ShOpLo, RevShAmt); | ||||
6321 | SDValue Tmp2 = DAG.getNode(ISD::SHL, dl, VT, ShOpHi, ShAmt); | ||||
6322 | SDValue HiSmallShift = DAG.getNode(ISD::OR, dl, VT, Tmp1, Tmp2); | ||||
6323 | |||||
6324 | SDValue ExtraShAmt = DAG.getNode(ISD::SUB, dl, MVT::i32, ShAmt, | ||||
6325 | DAG.getConstant(VTBits, dl, MVT::i32)); | ||||
6326 | SDValue HiBigShift = DAG.getNode(ISD::SHL, dl, VT, ShOpLo, ExtraShAmt); | ||||
6327 | SDValue CmpHi = getARMCmp(ExtraShAmt, DAG.getConstant(0, dl, MVT::i32), | ||||
6328 | ISD::SETGE, ARMcc, DAG, dl); | ||||
6329 | SDValue Hi = DAG.getNode(ARMISD::CMOV, dl, VT, HiSmallShift, HiBigShift, | ||||
6330 | ARMcc, CCR, CmpHi); | ||||
6331 | |||||
6332 | SDValue CmpLo = getARMCmp(ExtraShAmt, DAG.getConstant(0, dl, MVT::i32), | ||||
6333 | ISD::SETGE, ARMcc, DAG, dl); | ||||
6334 | SDValue LoSmallShift = DAG.getNode(ISD::SHL, dl, VT, ShOpLo, ShAmt); | ||||
6335 | SDValue Lo = DAG.getNode(ARMISD::CMOV, dl, VT, LoSmallShift, | ||||
6336 | DAG.getConstant(0, dl, VT), ARMcc, CCR, CmpLo); | ||||
6337 | |||||
6338 | SDValue Ops[2] = { Lo, Hi }; | ||||
6339 | return DAG.getMergeValues(Ops, dl); | ||||
6340 | } | ||||
6341 | |||||
6342 | SDValue ARMTargetLowering::LowerFLT_ROUNDS_(SDValue Op, | ||||
6343 | SelectionDAG &DAG) const { | ||||
6344 | // The rounding mode is in bits 23:22 of the FPSCR. | ||||
6345 | // The ARM rounding mode value to FLT_ROUNDS mapping is 0->1, 1->2, 2->3, 3->0 | ||||
6346 | // The formula we use to implement this is (((FPSCR + 1 << 22) >> 22) & 3) | ||||
6347 | // so that the shift + and get folded into a bitfield extract. | ||||
6348 | SDLoc dl(Op); | ||||
6349 | SDValue Chain = Op.getOperand(0); | ||||
6350 | SDValue Ops[] = {Chain, | ||||
6351 | DAG.getConstant(Intrinsic::arm_get_fpscr, dl, MVT::i32)}; | ||||
6352 | |||||
6353 | SDValue FPSCR = | ||||
6354 | DAG.getNode(ISD::INTRINSIC_W_CHAIN, dl, {MVT::i32, MVT::Other}, Ops); | ||||
6355 | Chain = FPSCR.getValue(1); | ||||
6356 | SDValue FltRounds = DAG.getNode(ISD::ADD, dl, MVT::i32, FPSCR, | ||||
6357 | DAG.getConstant(1U << 22, dl, MVT::i32)); | ||||
6358 | SDValue RMODE = DAG.getNode(ISD::SRL, dl, MVT::i32, FltRounds, | ||||
6359 | DAG.getConstant(22, dl, MVT::i32)); | ||||
6360 | SDValue And = DAG.getNode(ISD::AND, dl, MVT::i32, RMODE, | ||||
6361 | DAG.getConstant(3, dl, MVT::i32)); | ||||
6362 | return DAG.getMergeValues({And, Chain}, dl); | ||||
6363 | } | ||||
6364 | |||||
6365 | SDValue ARMTargetLowering::LowerSET_ROUNDING(SDValue Op, | ||||
6366 | SelectionDAG &DAG) const { | ||||
6367 | SDLoc DL(Op); | ||||
6368 | SDValue Chain = Op->getOperand(0); | ||||
6369 | SDValue RMValue = Op->getOperand(1); | ||||
6370 | |||||
6371 | // The rounding mode is in bits 23:22 of the FPSCR. | ||||
6372 | // The llvm.set.rounding argument value to ARM rounding mode value mapping | ||||
6373 | // is 0->3, 1->0, 2->1, 3->2. The formula we use to implement this is | ||||
6374 | // ((arg - 1) & 3) << 22). | ||||
6375 | // | ||||
6376 | // It is expected that the argument of llvm.set.rounding is within the | ||||
6377 | // segment [0, 3], so NearestTiesToAway (4) is not handled here. It is | ||||
6378 | // responsibility of the code generated llvm.set.rounding to ensure this | ||||
6379 | // condition. | ||||
6380 | |||||
6381 | // Calculate new value of FPSCR[23:22]. | ||||
6382 | RMValue = DAG.getNode(ISD::SUB, DL, MVT::i32, RMValue, | ||||
6383 | DAG.getConstant(1, DL, MVT::i32)); | ||||
6384 | RMValue = DAG.getNode(ISD::AND, DL, MVT::i32, RMValue, | ||||
6385 | DAG.getConstant(0x3, DL, MVT::i32)); | ||||
6386 | RMValue = DAG.getNode(ISD::SHL, DL, MVT::i32, RMValue, | ||||
6387 | DAG.getConstant(ARM::RoundingBitsPos, DL, MVT::i32)); | ||||
6388 | |||||
6389 | // Get current value of FPSCR. | ||||
6390 | SDValue Ops[] = {Chain, | ||||
6391 | DAG.getConstant(Intrinsic::arm_get_fpscr, DL, MVT::i32)}; | ||||
6392 | SDValue FPSCR = | ||||
6393 | DAG.getNode(ISD::INTRINSIC_W_CHAIN, DL, {MVT::i32, MVT::Other}, Ops); | ||||
6394 | Chain = FPSCR.getValue(1); | ||||
6395 | FPSCR = FPSCR.getValue(0); | ||||
6396 | |||||
6397 | // Put new rounding mode into FPSCR[23:22]. | ||||
6398 | const unsigned RMMask = ~(ARM::Rounding::rmMask << ARM::RoundingBitsPos); | ||||
6399 | FPSCR = DAG.getNode(ISD::AND, DL, MVT::i32, FPSCR, | ||||
6400 | DAG.getConstant(RMMask, DL, MVT::i32)); | ||||
6401 | FPSCR = DAG.getNode(ISD::OR, DL, MVT::i32, FPSCR, RMValue); | ||||
6402 | SDValue Ops2[] = { | ||||
6403 | Chain, DAG.getConstant(Intrinsic::arm_set_fpscr, DL, MVT::i32), FPSCR}; | ||||
6404 | return DAG.getNode(ISD::INTRINSIC_VOID, DL, MVT::Other, Ops2); | ||||
6405 | } | ||||
6406 | |||||
6407 | static SDValue LowerCTTZ(SDNode *N, SelectionDAG &DAG, | ||||
6408 | const ARMSubtarget *ST) { | ||||
6409 | SDLoc dl(N); | ||||
6410 | EVT VT = N->getValueType(0); | ||||
6411 | if (VT.isVector() && ST->hasNEON()) { | ||||
6412 | |||||
6413 | // Compute the least significant set bit: LSB = X & -X | ||||
6414 | SDValue X = N->getOperand(0); | ||||
6415 | SDValue NX = DAG.getNode(ISD::SUB, dl, VT, getZeroVector(VT, DAG, dl), X); | ||||
6416 | SDValue LSB = DAG.getNode(ISD::AND, dl, VT, X, NX); | ||||
6417 | |||||
6418 | EVT ElemTy = VT.getVectorElementType(); | ||||
6419 | |||||
6420 | if (ElemTy == MVT::i8) { | ||||
6421 | // Compute with: cttz(x) = ctpop(lsb - 1) | ||||
6422 | SDValue One = DAG.getNode(ARMISD::VMOVIMM, dl, VT, | ||||
6423 | DAG.getTargetConstant(1, dl, ElemTy)); | ||||
6424 | SDValue Bits = DAG.getNode(ISD::SUB, dl, VT, LSB, One); | ||||
6425 | return DAG.getNode(ISD::CTPOP, dl, VT, Bits); | ||||
6426 | } | ||||
6427 | |||||
6428 | if ((ElemTy == MVT::i16 || ElemTy == MVT::i32) && | ||||
6429 | (N->getOpcode() == ISD::CTTZ_ZERO_UNDEF)) { | ||||
6430 | // Compute with: cttz(x) = (width - 1) - ctlz(lsb), if x != 0 | ||||
6431 | unsigned NumBits = ElemTy.getSizeInBits(); | ||||
6432 | SDValue WidthMinus1 = | ||||
6433 | DAG.getNode(ARMISD::VMOVIMM, dl, VT, | ||||
6434 | DAG.getTargetConstant(NumBits - 1, dl, ElemTy)); | ||||
6435 | SDValue CTLZ = DAG.getNode(ISD::CTLZ, dl, VT, LSB); | ||||
6436 | return DAG.getNode(ISD::SUB, dl, VT, WidthMinus1, CTLZ); | ||||
6437 | } | ||||
6438 | |||||
6439 | // Compute with: cttz(x) = ctpop(lsb - 1) | ||||
6440 | |||||
6441 | // Compute LSB - 1. | ||||
6442 | SDValue Bits; | ||||
6443 | if (ElemTy == MVT::i64) { | ||||
6444 | // Load constant 0xffff'ffff'ffff'ffff to register. | ||||
6445 | SDValue FF = DAG.getNode(ARMISD::VMOVIMM, dl, VT, | ||||
6446 | DAG.getTargetConstant(0x1eff, dl, MVT::i32)); | ||||
6447 | Bits = DAG.getNode(ISD::ADD, dl, VT, LSB, FF); | ||||
6448 | } else { | ||||
6449 | SDValue One = DAG.getNode(ARMISD::VMOVIMM, dl, VT, | ||||
6450 | DAG.getTargetConstant(1, dl, ElemTy)); | ||||
6451 | Bits = DAG.getNode(ISD::SUB, dl, VT, LSB, One); | ||||
6452 | } | ||||
6453 | return DAG.getNode(ISD::CTPOP, dl, VT, Bits); | ||||
6454 | } | ||||
6455 | |||||
6456 | if (!ST->hasV6T2Ops()) | ||||
6457 | return SDValue(); | ||||
6458 | |||||
6459 | SDValue rbit = DAG.getNode(ISD::BITREVERSE, dl, VT, N->getOperand(0)); | ||||
6460 | return DAG.getNode(ISD::CTLZ, dl, VT, rbit); | ||||
6461 | } | ||||
6462 | |||||
6463 | static SDValue LowerCTPOP(SDNode *N, SelectionDAG &DAG, | ||||
6464 | const ARMSubtarget *ST) { | ||||
6465 | EVT VT = N->getValueType(0); | ||||
6466 | SDLoc DL(N); | ||||
6467 | |||||
6468 | assert(ST->hasNEON() && "Custom ctpop lowering requires NEON.")(static_cast <bool> (ST->hasNEON() && "Custom ctpop lowering requires NEON." ) ? void (0) : __assert_fail ("ST->hasNEON() && \"Custom ctpop lowering requires NEON.\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 6468, __extension__ __PRETTY_FUNCTION__)); | ||||
6469 | assert((VT == MVT::v1i64 || VT == MVT::v2i64 || VT == MVT::v2i32 ||(static_cast <bool> ((VT == MVT::v1i64 || VT == MVT::v2i64 || VT == MVT::v2i32 || VT == MVT::v4i32 || VT == MVT::v4i16 || VT == MVT::v8i16) && "Unexpected type for custom ctpop lowering" ) ? void (0) : __assert_fail ("(VT == MVT::v1i64 || VT == MVT::v2i64 || VT == MVT::v2i32 || VT == MVT::v4i32 || VT == MVT::v4i16 || VT == MVT::v8i16) && \"Unexpected type for custom ctpop lowering\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 6471, __extension__ __PRETTY_FUNCTION__)) | ||||
6470 | VT == MVT::v4i32 || VT == MVT::v4i16 || VT == MVT::v8i16) &&(static_cast <bool> ((VT == MVT::v1i64 || VT == MVT::v2i64 || VT == MVT::v2i32 || VT == MVT::v4i32 || VT == MVT::v4i16 || VT == MVT::v8i16) && "Unexpected type for custom ctpop lowering" ) ? void (0) : __assert_fail ("(VT == MVT::v1i64 || VT == MVT::v2i64 || VT == MVT::v2i32 || VT == MVT::v4i32 || VT == MVT::v4i16 || VT == MVT::v8i16) && \"Unexpected type for custom ctpop lowering\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 6471, __extension__ __PRETTY_FUNCTION__)) | ||||
6471 | "Unexpected type for custom ctpop lowering")(static_cast <bool> ((VT == MVT::v1i64 || VT == MVT::v2i64 || VT == MVT::v2i32 || VT == MVT::v4i32 || VT == MVT::v4i16 || VT == MVT::v8i16) && "Unexpected type for custom ctpop lowering" ) ? void (0) : __assert_fail ("(VT == MVT::v1i64 || VT == MVT::v2i64 || VT == MVT::v2i32 || VT == MVT::v4i32 || VT == MVT::v4i16 || VT == MVT::v8i16) && \"Unexpected type for custom ctpop lowering\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 6471, __extension__ __PRETTY_FUNCTION__)); | ||||
6472 | |||||
6473 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | ||||
6474 | EVT VT8Bit = VT.is64BitVector() ? MVT::v8i8 : MVT::v16i8; | ||||
6475 | SDValue Res = DAG.getBitcast(VT8Bit, N->getOperand(0)); | ||||
6476 | Res = DAG.getNode(ISD::CTPOP, DL, VT8Bit, Res); | ||||
6477 | |||||
6478 | // Widen v8i8/v16i8 CTPOP result to VT by repeatedly widening pairwise adds. | ||||
6479 | unsigned EltSize = 8; | ||||
6480 | unsigned NumElts = VT.is64BitVector() ? 8 : 16; | ||||
6481 | while (EltSize != VT.getScalarSizeInBits()) { | ||||
6482 | SmallVector<SDValue, 8> Ops; | ||||
6483 | Ops.push_back(DAG.getConstant(Intrinsic::arm_neon_vpaddlu, DL, | ||||
6484 | TLI.getPointerTy(DAG.getDataLayout()))); | ||||
6485 | Ops.push_back(Res); | ||||
6486 | |||||
6487 | EltSize *= 2; | ||||
6488 | NumElts /= 2; | ||||
6489 | MVT WidenVT = MVT::getVectorVT(MVT::getIntegerVT(EltSize), NumElts); | ||||
6490 | Res = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, WidenVT, Ops); | ||||
6491 | } | ||||
6492 | |||||
6493 | return Res; | ||||
6494 | } | ||||
6495 | |||||
6496 | /// Getvshiftimm - Check if this is a valid build_vector for the immediate | ||||
6497 | /// operand of a vector shift operation, where all the elements of the | ||||
6498 | /// build_vector must have the same constant integer value. | ||||
6499 | static bool getVShiftImm(SDValue Op, unsigned ElementBits, int64_t &Cnt) { | ||||
6500 | // Ignore bit_converts. | ||||
6501 | while (Op.getOpcode() == ISD::BITCAST) | ||||
6502 | Op = Op.getOperand(0); | ||||
6503 | BuildVectorSDNode *BVN = dyn_cast<BuildVectorSDNode>(Op.getNode()); | ||||
6504 | APInt SplatBits, SplatUndef; | ||||
6505 | unsigned SplatBitSize; | ||||
6506 | bool HasAnyUndefs; | ||||
6507 | if (!BVN || | ||||
6508 | !BVN->isConstantSplat(SplatBits, SplatUndef, SplatBitSize, HasAnyUndefs, | ||||
6509 | ElementBits) || | ||||
6510 | SplatBitSize > ElementBits) | ||||
6511 | return false; | ||||
6512 | Cnt = SplatBits.getSExtValue(); | ||||
6513 | return true; | ||||
6514 | } | ||||
6515 | |||||
6516 | /// isVShiftLImm - Check if this is a valid build_vector for the immediate | ||||
6517 | /// operand of a vector shift left operation. That value must be in the range: | ||||
6518 | /// 0 <= Value < ElementBits for a left shift; or | ||||
6519 | /// 0 <= Value <= ElementBits for a long left shift. | ||||
6520 | static bool isVShiftLImm(SDValue Op, EVT VT, bool isLong, int64_t &Cnt) { | ||||
6521 | assert(VT.isVector() && "vector shift count is not a vector type")(static_cast <bool> (VT.isVector() && "vector shift count is not a vector type" ) ? void (0) : __assert_fail ("VT.isVector() && \"vector shift count is not a vector type\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 6521, __extension__ __PRETTY_FUNCTION__)); | ||||
6522 | int64_t ElementBits = VT.getScalarSizeInBits(); | ||||
6523 | if (!getVShiftImm(Op, ElementBits, Cnt)) | ||||
6524 | return false; | ||||
6525 | return (Cnt >= 0 && (isLong ? Cnt - 1 : Cnt) < ElementBits); | ||||
6526 | } | ||||
6527 | |||||
6528 | /// isVShiftRImm - Check if this is a valid build_vector for the immediate | ||||
6529 | /// operand of a vector shift right operation. For a shift opcode, the value | ||||
6530 | /// is positive, but for an intrinsic the value count must be negative. The | ||||
6531 | /// absolute value must be in the range: | ||||
6532 | /// 1 <= |Value| <= ElementBits for a right shift; or | ||||
6533 | /// 1 <= |Value| <= ElementBits/2 for a narrow right shift. | ||||
6534 | static bool isVShiftRImm(SDValue Op, EVT VT, bool isNarrow, bool isIntrinsic, | ||||
6535 | int64_t &Cnt) { | ||||
6536 | assert(VT.isVector() && "vector shift count is not a vector type")(static_cast <bool> (VT.isVector() && "vector shift count is not a vector type" ) ? void (0) : __assert_fail ("VT.isVector() && \"vector shift count is not a vector type\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 6536, __extension__ __PRETTY_FUNCTION__)); | ||||
6537 | int64_t ElementBits = VT.getScalarSizeInBits(); | ||||
6538 | if (!getVShiftImm(Op, ElementBits, Cnt)) | ||||
6539 | return false; | ||||
6540 | if (!isIntrinsic) | ||||
6541 | return (Cnt >= 1 && Cnt <= (isNarrow ? ElementBits / 2 : ElementBits)); | ||||
6542 | if (Cnt >= -(isNarrow ? ElementBits / 2 : ElementBits) && Cnt <= -1) { | ||||
6543 | Cnt = -Cnt; | ||||
6544 | return true; | ||||
6545 | } | ||||
6546 | return false; | ||||
6547 | } | ||||
6548 | |||||
6549 | static SDValue LowerShift(SDNode *N, SelectionDAG &DAG, | ||||
6550 | const ARMSubtarget *ST) { | ||||
6551 | EVT VT = N->getValueType(0); | ||||
6552 | SDLoc dl(N); | ||||
6553 | int64_t Cnt; | ||||
6554 | |||||
6555 | if (!VT.isVector()) | ||||
6556 | return SDValue(); | ||||
6557 | |||||
6558 | // We essentially have two forms here. Shift by an immediate and shift by a | ||||
6559 | // vector register (there are also shift by a gpr, but that is just handled | ||||
6560 | // with a tablegen pattern). We cannot easily match shift by an immediate in | ||||
6561 | // tablegen so we do that here and generate a VSHLIMM/VSHRsIMM/VSHRuIMM. | ||||
6562 | // For shifting by a vector, we don't have VSHR, only VSHL (which can be | ||||
6563 | // signed or unsigned, and a negative shift indicates a shift right). | ||||
6564 | if (N->getOpcode() == ISD::SHL) { | ||||
6565 | if (isVShiftLImm(N->getOperand(1), VT, false, Cnt)) | ||||
6566 | return DAG.getNode(ARMISD::VSHLIMM, dl, VT, N->getOperand(0), | ||||
6567 | DAG.getConstant(Cnt, dl, MVT::i32)); | ||||
6568 | return DAG.getNode(ARMISD::VSHLu, dl, VT, N->getOperand(0), | ||||
6569 | N->getOperand(1)); | ||||
6570 | } | ||||
6571 | |||||
6572 | assert((N->getOpcode() == ISD::SRA || N->getOpcode() == ISD::SRL) &&(static_cast <bool> ((N->getOpcode() == ISD::SRA || N ->getOpcode() == ISD::SRL) && "unexpected vector shift opcode" ) ? void (0) : __assert_fail ("(N->getOpcode() == ISD::SRA || N->getOpcode() == ISD::SRL) && \"unexpected vector shift opcode\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 6573, __extension__ __PRETTY_FUNCTION__)) | ||||
6573 | "unexpected vector shift opcode")(static_cast <bool> ((N->getOpcode() == ISD::SRA || N ->getOpcode() == ISD::SRL) && "unexpected vector shift opcode" ) ? void (0) : __assert_fail ("(N->getOpcode() == ISD::SRA || N->getOpcode() == ISD::SRL) && \"unexpected vector shift opcode\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 6573, __extension__ __PRETTY_FUNCTION__)); | ||||
6574 | |||||
6575 | if (isVShiftRImm(N->getOperand(1), VT, false, false, Cnt)) { | ||||
6576 | unsigned VShiftOpc = | ||||
6577 | (N->getOpcode() == ISD::SRA ? ARMISD::VSHRsIMM : ARMISD::VSHRuIMM); | ||||
6578 | return DAG.getNode(VShiftOpc, dl, VT, N->getOperand(0), | ||||
6579 | DAG.getConstant(Cnt, dl, MVT::i32)); | ||||
6580 | } | ||||
6581 | |||||
6582 | // Other right shifts we don't have operations for (we use a shift left by a | ||||
6583 | // negative number). | ||||
6584 | EVT ShiftVT = N->getOperand(1).getValueType(); | ||||
6585 | SDValue NegatedCount = DAG.getNode( | ||||
6586 | ISD::SUB, dl, ShiftVT, getZeroVector(ShiftVT, DAG, dl), N->getOperand(1)); | ||||
6587 | unsigned VShiftOpc = | ||||
6588 | (N->getOpcode() == ISD::SRA ? ARMISD::VSHLs : ARMISD::VSHLu); | ||||
6589 | return DAG.getNode(VShiftOpc, dl, VT, N->getOperand(0), NegatedCount); | ||||
6590 | } | ||||
6591 | |||||
6592 | static SDValue Expand64BitShift(SDNode *N, SelectionDAG &DAG, | ||||
6593 | const ARMSubtarget *ST) { | ||||
6594 | EVT VT = N->getValueType(0); | ||||
6595 | SDLoc dl(N); | ||||
6596 | |||||
6597 | // We can get here for a node like i32 = ISD::SHL i32, i64 | ||||
6598 | if (VT != MVT::i64) | ||||
6599 | return SDValue(); | ||||
6600 | |||||
6601 | assert((N->getOpcode() == ISD::SRL || N->getOpcode() == ISD::SRA ||(static_cast <bool> ((N->getOpcode() == ISD::SRL || N ->getOpcode() == ISD::SRA || N->getOpcode() == ISD::SHL ) && "Unknown shift to lower!") ? void (0) : __assert_fail ("(N->getOpcode() == ISD::SRL || N->getOpcode() == ISD::SRA || N->getOpcode() == ISD::SHL) && \"Unknown shift to lower!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 6603, __extension__ __PRETTY_FUNCTION__)) | ||||
6602 | N->getOpcode() == ISD::SHL) &&(static_cast <bool> ((N->getOpcode() == ISD::SRL || N ->getOpcode() == ISD::SRA || N->getOpcode() == ISD::SHL ) && "Unknown shift to lower!") ? void (0) : __assert_fail ("(N->getOpcode() == ISD::SRL || N->getOpcode() == ISD::SRA || N->getOpcode() == ISD::SHL) && \"Unknown shift to lower!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 6603, __extension__ __PRETTY_FUNCTION__)) | ||||
6603 | "Unknown shift to lower!")(static_cast <bool> ((N->getOpcode() == ISD::SRL || N ->getOpcode() == ISD::SRA || N->getOpcode() == ISD::SHL ) && "Unknown shift to lower!") ? void (0) : __assert_fail ("(N->getOpcode() == ISD::SRL || N->getOpcode() == ISD::SRA || N->getOpcode() == ISD::SHL) && \"Unknown shift to lower!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 6603, __extension__ __PRETTY_FUNCTION__)); | ||||
6604 | |||||
6605 | unsigned ShOpc = N->getOpcode(); | ||||
6606 | if (ST->hasMVEIntegerOps()) { | ||||
6607 | SDValue ShAmt = N->getOperand(1); | ||||
6608 | unsigned ShPartsOpc = ARMISD::LSLL; | ||||
6609 | ConstantSDNode *Con = dyn_cast<ConstantSDNode>(ShAmt); | ||||
6610 | |||||
6611 | // If the shift amount is greater than 32 or has a greater bitwidth than 64 | ||||
6612 | // then do the default optimisation | ||||
6613 | if (ShAmt->getValueType(0).getSizeInBits() > 64 || | ||||
6614 | (Con && (Con->getZExtValue() == 0 || Con->getZExtValue() >= 32))) | ||||
6615 | return SDValue(); | ||||
6616 | |||||
6617 | // Extract the lower 32 bits of the shift amount if it's not an i32 | ||||
6618 | if (ShAmt->getValueType(0) != MVT::i32) | ||||
6619 | ShAmt = DAG.getZExtOrTrunc(ShAmt, dl, MVT::i32); | ||||
6620 | |||||
6621 | if (ShOpc == ISD::SRL) { | ||||
6622 | if (!Con) | ||||
6623 | // There is no t2LSRLr instruction so negate and perform an lsll if the | ||||
6624 | // shift amount is in a register, emulating a right shift. | ||||
6625 | ShAmt = DAG.getNode(ISD::SUB, dl, MVT::i32, | ||||
6626 | DAG.getConstant(0, dl, MVT::i32), ShAmt); | ||||
6627 | else | ||||
6628 | // Else generate an lsrl on the immediate shift amount | ||||
6629 | ShPartsOpc = ARMISD::LSRL; | ||||
6630 | } else if (ShOpc == ISD::SRA) | ||||
6631 | ShPartsOpc = ARMISD::ASRL; | ||||
6632 | |||||
6633 | // Lower 32 bits of the destination/source | ||||
6634 | SDValue Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, N->getOperand(0), | ||||
6635 | DAG.getConstant(0, dl, MVT::i32)); | ||||
6636 | // Upper 32 bits of the destination/source | ||||
6637 | SDValue Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, N->getOperand(0), | ||||
6638 | DAG.getConstant(1, dl, MVT::i32)); | ||||
6639 | |||||
6640 | // Generate the shift operation as computed above | ||||
6641 | Lo = DAG.getNode(ShPartsOpc, dl, DAG.getVTList(MVT::i32, MVT::i32), Lo, Hi, | ||||
6642 | ShAmt); | ||||
6643 | // The upper 32 bits come from the second return value of lsll | ||||
6644 | Hi = SDValue(Lo.getNode(), 1); | ||||
6645 | return DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Lo, Hi); | ||||
6646 | } | ||||
6647 | |||||
6648 | // We only lower SRA, SRL of 1 here, all others use generic lowering. | ||||
6649 | if (!isOneConstant(N->getOperand(1)) || N->getOpcode() == ISD::SHL) | ||||
6650 | return SDValue(); | ||||
6651 | |||||
6652 | // If we are in thumb mode, we don't have RRX. | ||||
6653 | if (ST->isThumb1Only()) | ||||
6654 | return SDValue(); | ||||
6655 | |||||
6656 | // Okay, we have a 64-bit SRA or SRL of 1. Lower this to an RRX expr. | ||||
6657 | SDValue Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, N->getOperand(0), | ||||
6658 | DAG.getConstant(0, dl, MVT::i32)); | ||||
6659 | SDValue Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, N->getOperand(0), | ||||
6660 | DAG.getConstant(1, dl, MVT::i32)); | ||||
6661 | |||||
6662 | // First, build a SRA_FLAG/SRL_FLAG op, which shifts the top part by one and | ||||
6663 | // captures the result into a carry flag. | ||||
6664 | unsigned Opc = N->getOpcode() == ISD::SRL ? ARMISD::SRL_FLAG:ARMISD::SRA_FLAG; | ||||
6665 | Hi = DAG.getNode(Opc, dl, DAG.getVTList(MVT::i32, MVT::Glue), Hi); | ||||
6666 | |||||
6667 | // The low part is an ARMISD::RRX operand, which shifts the carry in. | ||||
6668 | Lo = DAG.getNode(ARMISD::RRX, dl, MVT::i32, Lo, Hi.getValue(1)); | ||||
6669 | |||||
6670 | // Merge the pieces into a single i64 value. | ||||
6671 | return DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Lo, Hi); | ||||
6672 | } | ||||
6673 | |||||
6674 | static SDValue LowerVSETCC(SDValue Op, SelectionDAG &DAG, | ||||
6675 | const ARMSubtarget *ST) { | ||||
6676 | bool Invert = false; | ||||
6677 | bool Swap = false; | ||||
6678 | unsigned Opc = ARMCC::AL; | ||||
6679 | |||||
6680 | SDValue Op0 = Op.getOperand(0); | ||||
6681 | SDValue Op1 = Op.getOperand(1); | ||||
6682 | SDValue CC = Op.getOperand(2); | ||||
6683 | EVT VT = Op.getValueType(); | ||||
6684 | ISD::CondCode SetCCOpcode = cast<CondCodeSDNode>(CC)->get(); | ||||
6685 | SDLoc dl(Op); | ||||
6686 | |||||
6687 | EVT CmpVT; | ||||
6688 | if (ST->hasNEON()) | ||||
6689 | CmpVT = Op0.getValueType().changeVectorElementTypeToInteger(); | ||||
6690 | else { | ||||
6691 | assert(ST->hasMVEIntegerOps() &&(static_cast <bool> (ST->hasMVEIntegerOps() && "No hardware support for integer vector comparison!") ? void (0) : __assert_fail ("ST->hasMVEIntegerOps() && \"No hardware support for integer vector comparison!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 6692, __extension__ __PRETTY_FUNCTION__)) | ||||
6692 | "No hardware support for integer vector comparison!")(static_cast <bool> (ST->hasMVEIntegerOps() && "No hardware support for integer vector comparison!") ? void (0) : __assert_fail ("ST->hasMVEIntegerOps() && \"No hardware support for integer vector comparison!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 6692, __extension__ __PRETTY_FUNCTION__)); | ||||
6693 | |||||
6694 | if (Op.getValueType().getVectorElementType() != MVT::i1) | ||||
6695 | return SDValue(); | ||||
6696 | |||||
6697 | // Make sure we expand floating point setcc to scalar if we do not have | ||||
6698 | // mve.fp, so that we can handle them from there. | ||||
6699 | if (Op0.getValueType().isFloatingPoint() && !ST->hasMVEFloatOps()) | ||||
6700 | return SDValue(); | ||||
6701 | |||||
6702 | CmpVT = VT; | ||||
6703 | } | ||||
6704 | |||||
6705 | if (Op0.getValueType().getVectorElementType() == MVT::i64 && | ||||
6706 | (SetCCOpcode == ISD::SETEQ || SetCCOpcode == ISD::SETNE)) { | ||||
6707 | // Special-case integer 64-bit equality comparisons. They aren't legal, | ||||
6708 | // but they can be lowered with a few vector instructions. | ||||
6709 | unsigned CmpElements = CmpVT.getVectorNumElements() * 2; | ||||
6710 | EVT SplitVT = EVT::getVectorVT(*DAG.getContext(), MVT::i32, CmpElements); | ||||
6711 | SDValue CastOp0 = DAG.getNode(ISD::BITCAST, dl, SplitVT, Op0); | ||||
6712 | SDValue CastOp1 = DAG.getNode(ISD::BITCAST, dl, SplitVT, Op1); | ||||
6713 | SDValue Cmp = DAG.getNode(ISD::SETCC, dl, SplitVT, CastOp0, CastOp1, | ||||
6714 | DAG.getCondCode(ISD::SETEQ)); | ||||
6715 | SDValue Reversed = DAG.getNode(ARMISD::VREV64, dl, SplitVT, Cmp); | ||||
6716 | SDValue Merged = DAG.getNode(ISD::AND, dl, SplitVT, Cmp, Reversed); | ||||
6717 | Merged = DAG.getNode(ISD::BITCAST, dl, CmpVT, Merged); | ||||
6718 | if (SetCCOpcode == ISD::SETNE) | ||||
6719 | Merged = DAG.getNOT(dl, Merged, CmpVT); | ||||
6720 | Merged = DAG.getSExtOrTrunc(Merged, dl, VT); | ||||
6721 | return Merged; | ||||
6722 | } | ||||
6723 | |||||
6724 | if (CmpVT.getVectorElementType() == MVT::i64) | ||||
6725 | // 64-bit comparisons are not legal in general. | ||||
6726 | return SDValue(); | ||||
6727 | |||||
6728 | if (Op1.getValueType().isFloatingPoint()) { | ||||
6729 | switch (SetCCOpcode) { | ||||
6730 | default: llvm_unreachable("Illegal FP comparison")::llvm::llvm_unreachable_internal("Illegal FP comparison", "llvm/lib/Target/ARM/ARMISelLowering.cpp" , 6730); | ||||
6731 | case ISD::SETUNE: | ||||
6732 | case ISD::SETNE: | ||||
6733 | if (ST->hasMVEFloatOps()) { | ||||
6734 | Opc = ARMCC::NE; break; | ||||
6735 | } else { | ||||
6736 | Invert = true; LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||
6737 | } | ||||
6738 | case ISD::SETOEQ: | ||||
6739 | case ISD::SETEQ: Opc = ARMCC::EQ; break; | ||||
6740 | case ISD::SETOLT: | ||||
6741 | case ISD::SETLT: Swap = true; LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||
6742 | case ISD::SETOGT: | ||||
6743 | case ISD::SETGT: Opc = ARMCC::GT; break; | ||||
6744 | case ISD::SETOLE: | ||||
6745 | case ISD::SETLE: Swap = true; LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||
6746 | case ISD::SETOGE: | ||||
6747 | case ISD::SETGE: Opc = ARMCC::GE; break; | ||||
6748 | case ISD::SETUGE: Swap = true; LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||
6749 | case ISD::SETULE: Invert = true; Opc = ARMCC::GT; break; | ||||
6750 | case ISD::SETUGT: Swap = true; LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||
6751 | case ISD::SETULT: Invert = true; Opc = ARMCC::GE; break; | ||||
6752 | case ISD::SETUEQ: Invert = true; LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||
6753 | case ISD::SETONE: { | ||||
6754 | // Expand this to (OLT | OGT). | ||||
6755 | SDValue TmpOp0 = DAG.getNode(ARMISD::VCMP, dl, CmpVT, Op1, Op0, | ||||
6756 | DAG.getConstant(ARMCC::GT, dl, MVT::i32)); | ||||
6757 | SDValue TmpOp1 = DAG.getNode(ARMISD::VCMP, dl, CmpVT, Op0, Op1, | ||||
6758 | DAG.getConstant(ARMCC::GT, dl, MVT::i32)); | ||||
6759 | SDValue Result = DAG.getNode(ISD::OR, dl, CmpVT, TmpOp0, TmpOp1); | ||||
6760 | if (Invert) | ||||
6761 | Result = DAG.getNOT(dl, Result, VT); | ||||
6762 | return Result; | ||||
6763 | } | ||||
6764 | case ISD::SETUO: Invert = true; LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||
6765 | case ISD::SETO: { | ||||
6766 | // Expand this to (OLT | OGE). | ||||
6767 | SDValue TmpOp0 = DAG.getNode(ARMISD::VCMP, dl, CmpVT, Op1, Op0, | ||||
6768 | DAG.getConstant(ARMCC::GT, dl, MVT::i32)); | ||||
6769 | SDValue TmpOp1 = DAG.getNode(ARMISD::VCMP, dl, CmpVT, Op0, Op1, | ||||
6770 | DAG.getConstant(ARMCC::GE, dl, MVT::i32)); | ||||
6771 | SDValue Result = DAG.getNode(ISD::OR, dl, CmpVT, TmpOp0, TmpOp1); | ||||
6772 | if (Invert) | ||||
6773 | Result = DAG.getNOT(dl, Result, VT); | ||||
6774 | return Result; | ||||
6775 | } | ||||
6776 | } | ||||
6777 | } else { | ||||
6778 | // Integer comparisons. | ||||
6779 | switch (SetCCOpcode) { | ||||
6780 | default: llvm_unreachable("Illegal integer comparison")::llvm::llvm_unreachable_internal("Illegal integer comparison" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 6780); | ||||
6781 | case ISD::SETNE: | ||||
6782 | if (ST->hasMVEIntegerOps()) { | ||||
6783 | Opc = ARMCC::NE; break; | ||||
6784 | } else { | ||||
6785 | Invert = true; LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||
6786 | } | ||||
6787 | case ISD::SETEQ: Opc = ARMCC::EQ; break; | ||||
6788 | case ISD::SETLT: Swap = true; LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||
6789 | case ISD::SETGT: Opc = ARMCC::GT; break; | ||||
6790 | case ISD::SETLE: Swap = true; LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||
6791 | case ISD::SETGE: Opc = ARMCC::GE; break; | ||||
6792 | case ISD::SETULT: Swap = true; LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||
6793 | case ISD::SETUGT: Opc = ARMCC::HI; break; | ||||
6794 | case ISD::SETULE: Swap = true; LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||
6795 | case ISD::SETUGE: Opc = ARMCC::HS; break; | ||||
6796 | } | ||||
6797 | |||||
6798 | // Detect VTST (Vector Test Bits) = icmp ne (and (op0, op1), zero). | ||||
6799 | if (ST->hasNEON() && Opc == ARMCC::EQ) { | ||||
6800 | SDValue AndOp; | ||||
6801 | if (ISD::isBuildVectorAllZeros(Op1.getNode())) | ||||
6802 | AndOp = Op0; | ||||
6803 | else if (ISD::isBuildVectorAllZeros(Op0.getNode())) | ||||
6804 | AndOp = Op1; | ||||
6805 | |||||
6806 | // Ignore bitconvert. | ||||
6807 | if (AndOp.getNode() && AndOp.getOpcode() == ISD::BITCAST) | ||||
6808 | AndOp = AndOp.getOperand(0); | ||||
6809 | |||||
6810 | if (AndOp.getNode() && AndOp.getOpcode() == ISD::AND) { | ||||
6811 | Op0 = DAG.getNode(ISD::BITCAST, dl, CmpVT, AndOp.getOperand(0)); | ||||
6812 | Op1 = DAG.getNode(ISD::BITCAST, dl, CmpVT, AndOp.getOperand(1)); | ||||
6813 | SDValue Result = DAG.getNode(ARMISD::VTST, dl, CmpVT, Op0, Op1); | ||||
6814 | if (!Invert) | ||||
6815 | Result = DAG.getNOT(dl, Result, VT); | ||||
6816 | return Result; | ||||
6817 | } | ||||
6818 | } | ||||
6819 | } | ||||
6820 | |||||
6821 | if (Swap) | ||||
6822 | std::swap(Op0, Op1); | ||||
6823 | |||||
6824 | // If one of the operands is a constant vector zero, attempt to fold the | ||||
6825 | // comparison to a specialized compare-against-zero form. | ||||
6826 | SDValue SingleOp; | ||||
6827 | if (ISD::isBuildVectorAllZeros(Op1.getNode())) | ||||
6828 | SingleOp = Op0; | ||||
6829 | else if (ISD::isBuildVectorAllZeros(Op0.getNode())) { | ||||
6830 | if (Opc == ARMCC::GE) | ||||
6831 | Opc = ARMCC::LE; | ||||
6832 | else if (Opc == ARMCC::GT) | ||||
6833 | Opc = ARMCC::LT; | ||||
6834 | SingleOp = Op1; | ||||
6835 | } | ||||
6836 | |||||
6837 | SDValue Result; | ||||
6838 | if (SingleOp.getNode()) { | ||||
6839 | Result = DAG.getNode(ARMISD::VCMPZ, dl, CmpVT, SingleOp, | ||||
6840 | DAG.getConstant(Opc, dl, MVT::i32)); | ||||
6841 | } else { | ||||
6842 | Result = DAG.getNode(ARMISD::VCMP, dl, CmpVT, Op0, Op1, | ||||
6843 | DAG.getConstant(Opc, dl, MVT::i32)); | ||||
6844 | } | ||||
6845 | |||||
6846 | Result = DAG.getSExtOrTrunc(Result, dl, VT); | ||||
6847 | |||||
6848 | if (Invert) | ||||
6849 | Result = DAG.getNOT(dl, Result, VT); | ||||
6850 | |||||
6851 | return Result; | ||||
6852 | } | ||||
6853 | |||||
6854 | static SDValue LowerSETCCCARRY(SDValue Op, SelectionDAG &DAG) { | ||||
6855 | SDValue LHS = Op.getOperand(0); | ||||
6856 | SDValue RHS = Op.getOperand(1); | ||||
6857 | SDValue Carry = Op.getOperand(2); | ||||
6858 | SDValue Cond = Op.getOperand(3); | ||||
6859 | SDLoc DL(Op); | ||||
6860 | |||||
6861 | 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.\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 6861, __extension__ __PRETTY_FUNCTION__)); | ||||
6862 | |||||
6863 | // ARMISD::SUBE expects a carry not a borrow like ISD::SUBCARRY so we | ||||
6864 | // have to invert the carry first. | ||||
6865 | Carry = DAG.getNode(ISD::SUB, DL, MVT::i32, | ||||
6866 | DAG.getConstant(1, DL, MVT::i32), Carry); | ||||
6867 | // This converts the boolean value carry into the carry flag. | ||||
6868 | Carry = ConvertBooleanCarryToCarryFlag(Carry, DAG); | ||||
6869 | |||||
6870 | SDVTList VTs = DAG.getVTList(LHS.getValueType(), MVT::i32); | ||||
6871 | SDValue Cmp = DAG.getNode(ARMISD::SUBE, DL, VTs, LHS, RHS, Carry); | ||||
6872 | |||||
6873 | SDValue FVal = DAG.getConstant(0, DL, MVT::i32); | ||||
6874 | SDValue TVal = DAG.getConstant(1, DL, MVT::i32); | ||||
6875 | SDValue ARMcc = DAG.getConstant( | ||||
6876 | IntCCToARMCC(cast<CondCodeSDNode>(Cond)->get()), DL, MVT::i32); | ||||
6877 | SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32); | ||||
6878 | SDValue Chain = DAG.getCopyToReg(DAG.getEntryNode(), DL, ARM::CPSR, | ||||
6879 | Cmp.getValue(1), SDValue()); | ||||
6880 | return DAG.getNode(ARMISD::CMOV, DL, Op.getValueType(), FVal, TVal, ARMcc, | ||||
6881 | CCR, Chain.getValue(1)); | ||||
6882 | } | ||||
6883 | |||||
6884 | /// isVMOVModifiedImm - Check if the specified splat value corresponds to a | ||||
6885 | /// valid vector constant for a NEON or MVE instruction with a "modified | ||||
6886 | /// immediate" operand (e.g., VMOV). If so, return the encoded value. | ||||
6887 | static SDValue isVMOVModifiedImm(uint64_t SplatBits, uint64_t SplatUndef, | ||||
6888 | unsigned SplatBitSize, SelectionDAG &DAG, | ||||
6889 | const SDLoc &dl, EVT &VT, EVT VectorVT, | ||||
6890 | VMOVModImmType type) { | ||||
6891 | unsigned OpCmode, Imm; | ||||
6892 | bool is128Bits = VectorVT.is128BitVector(); | ||||
6893 | |||||
6894 | // SplatBitSize is set to the smallest size that splats the vector, so a | ||||
6895 | // zero vector will always have SplatBitSize == 8. However, NEON modified | ||||
6896 | // immediate instructions others than VMOV do not support the 8-bit encoding | ||||
6897 | // of a zero vector, and the default encoding of zero is supposed to be the | ||||
6898 | // 32-bit version. | ||||
6899 | if (SplatBits == 0) | ||||
6900 | SplatBitSize = 32; | ||||
6901 | |||||
6902 | switch (SplatBitSize) { | ||||
6903 | case 8: | ||||
6904 | if (type != VMOVModImm) | ||||
6905 | return SDValue(); | ||||
6906 | // Any 1-byte value is OK. Op=0, Cmode=1110. | ||||
6907 | assert((SplatBits & ~0xff) == 0 && "one byte splat value is too big")(static_cast <bool> ((SplatBits & ~0xff) == 0 && "one byte splat value is too big") ? void (0) : __assert_fail ("(SplatBits & ~0xff) == 0 && \"one byte splat value is too big\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 6907, __extension__ __PRETTY_FUNCTION__)); | ||||
6908 | OpCmode = 0xe; | ||||
6909 | Imm = SplatBits; | ||||
6910 | VT = is128Bits ? MVT::v16i8 : MVT::v8i8; | ||||
6911 | break; | ||||
6912 | |||||
6913 | case 16: | ||||
6914 | // NEON's 16-bit VMOV supports splat values where only one byte is nonzero. | ||||
6915 | VT = is128Bits ? MVT::v8i16 : MVT::v4i16; | ||||
6916 | if ((SplatBits & ~0xff) == 0) { | ||||
6917 | // Value = 0x00nn: Op=x, Cmode=100x. | ||||
6918 | OpCmode = 0x8; | ||||
6919 | Imm = SplatBits; | ||||
6920 | break; | ||||
6921 | } | ||||
6922 | if ((SplatBits & ~0xff00) == 0) { | ||||
6923 | // Value = 0xnn00: Op=x, Cmode=101x. | ||||
6924 | OpCmode = 0xa; | ||||
6925 | Imm = SplatBits >> 8; | ||||
6926 | break; | ||||
6927 | } | ||||
6928 | return SDValue(); | ||||
6929 | |||||
6930 | case 32: | ||||
6931 | // NEON's 32-bit VMOV supports splat values where: | ||||
6932 | // * only one byte is nonzero, or | ||||
6933 | // * the least significant byte is 0xff and the second byte is nonzero, or | ||||
6934 | // * the least significant 2 bytes are 0xff and the third is nonzero. | ||||
6935 | VT = is128Bits ? MVT::v4i32 : MVT::v2i32; | ||||
6936 | if ((SplatBits & ~0xff) == 0) { | ||||
6937 | // Value = 0x000000nn: Op=x, Cmode=000x. | ||||
6938 | OpCmode = 0; | ||||
6939 | Imm = SplatBits; | ||||
6940 | break; | ||||
6941 | } | ||||
6942 | if ((SplatBits & ~0xff00) == 0) { | ||||
6943 | // Value = 0x0000nn00: Op=x, Cmode=001x. | ||||
6944 | OpCmode = 0x2; | ||||
6945 | Imm = SplatBits >> 8; | ||||
6946 | break; | ||||
6947 | } | ||||
6948 | if ((SplatBits & ~0xff0000) == 0) { | ||||
6949 | // Value = 0x00nn0000: Op=x, Cmode=010x. | ||||
6950 | OpCmode = 0x4; | ||||
6951 | Imm = SplatBits >> 16; | ||||
6952 | break; | ||||
6953 | } | ||||
6954 | if ((SplatBits & ~0xff000000) == 0) { | ||||
6955 | // Value = 0xnn000000: Op=x, Cmode=011x. | ||||
6956 | OpCmode = 0x6; | ||||
6957 | Imm = SplatBits >> 24; | ||||
6958 | break; | ||||
6959 | } | ||||
6960 | |||||
6961 | // cmode == 0b1100 and cmode == 0b1101 are not supported for VORR or VBIC | ||||
6962 | if (type == OtherModImm) return SDValue(); | ||||
6963 | |||||
6964 | if ((SplatBits & ~0xffff) == 0 && | ||||
6965 | ((SplatBits | SplatUndef) & 0xff) == 0xff) { | ||||
6966 | // Value = 0x0000nnff: Op=x, Cmode=1100. | ||||
6967 | OpCmode = 0xc; | ||||
6968 | Imm = SplatBits >> 8; | ||||
6969 | break; | ||||
6970 | } | ||||
6971 | |||||
6972 | // cmode == 0b1101 is not supported for MVE VMVN | ||||
6973 | if (type == MVEVMVNModImm) | ||||
6974 | return SDValue(); | ||||
6975 | |||||
6976 | if ((SplatBits & ~0xffffff) == 0 && | ||||
6977 | ((SplatBits | SplatUndef) & 0xffff) == 0xffff) { | ||||
6978 | // Value = 0x00nnffff: Op=x, Cmode=1101. | ||||
6979 | OpCmode = 0xd; | ||||
6980 | Imm = SplatBits >> 16; | ||||
6981 | break; | ||||
6982 | } | ||||
6983 | |||||
6984 | // Note: there are a few 32-bit splat values (specifically: 00ffff00, | ||||
6985 | // ff000000, ff0000ff, and ffff00ff) that are valid for VMOV.I64 but not | ||||
6986 | // VMOV.I32. A (very) minor optimization would be to replicate the value | ||||
6987 | // and fall through here to test for a valid 64-bit splat. But, then the | ||||
6988 | // caller would also need to check and handle the change in size. | ||||
6989 | return SDValue(); | ||||
6990 | |||||
6991 | case 64: { | ||||
6992 | if (type != VMOVModImm) | ||||
6993 | return SDValue(); | ||||
6994 | // NEON has a 64-bit VMOV splat where each byte is either 0 or 0xff. | ||||
6995 | uint64_t BitMask = 0xff; | ||||
6996 | unsigned ImmMask = 1; | ||||
6997 | Imm = 0; | ||||
6998 | for (int ByteNum = 0; ByteNum < 8; ++ByteNum) { | ||||
6999 | if (((SplatBits | SplatUndef) & BitMask) == BitMask) { | ||||
7000 | Imm |= ImmMask; | ||||
7001 | } else if ((SplatBits & BitMask) != 0) { | ||||
7002 | return SDValue(); | ||||
7003 | } | ||||
7004 | BitMask <<= 8; | ||||
7005 | ImmMask <<= 1; | ||||
7006 | } | ||||
7007 | |||||
7008 | if (DAG.getDataLayout().isBigEndian()) { | ||||
7009 | // Reverse the order of elements within the vector. | ||||
7010 | unsigned BytesPerElem = VectorVT.getScalarSizeInBits() / 8; | ||||
7011 | unsigned Mask = (1 << BytesPerElem) - 1; | ||||
7012 | unsigned NumElems = 8 / BytesPerElem; | ||||
7013 | unsigned NewImm = 0; | ||||
7014 | for (unsigned ElemNum = 0; ElemNum < NumElems; ++ElemNum) { | ||||
7015 | unsigned Elem = ((Imm >> ElemNum * BytesPerElem) & Mask); | ||||
7016 | NewImm |= Elem << (NumElems - ElemNum - 1) * BytesPerElem; | ||||
7017 | } | ||||
7018 | Imm = NewImm; | ||||
7019 | } | ||||
7020 | |||||
7021 | // Op=1, Cmode=1110. | ||||
7022 | OpCmode = 0x1e; | ||||
7023 | VT = is128Bits ? MVT::v2i64 : MVT::v1i64; | ||||
7024 | break; | ||||
7025 | } | ||||
7026 | |||||
7027 | default: | ||||
7028 | llvm_unreachable("unexpected size for isVMOVModifiedImm")::llvm::llvm_unreachable_internal("unexpected size for isVMOVModifiedImm" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 7028); | ||||
7029 | } | ||||
7030 | |||||
7031 | unsigned EncodedVal = ARM_AM::createVMOVModImm(OpCmode, Imm); | ||||
7032 | return DAG.getTargetConstant(EncodedVal, dl, MVT::i32); | ||||
7033 | } | ||||
7034 | |||||
7035 | SDValue ARMTargetLowering::LowerConstantFP(SDValue Op, SelectionDAG &DAG, | ||||
7036 | const ARMSubtarget *ST) const { | ||||
7037 | EVT VT = Op.getValueType(); | ||||
7038 | bool IsDouble = (VT == MVT::f64); | ||||
7039 | ConstantFPSDNode *CFP = cast<ConstantFPSDNode>(Op); | ||||
7040 | const APFloat &FPVal = CFP->getValueAPF(); | ||||
7041 | |||||
7042 | // Prevent floating-point constants from using literal loads | ||||
7043 | // when execute-only is enabled. | ||||
7044 | if (ST->genExecuteOnly()) { | ||||
7045 | // If we can represent the constant as an immediate, don't lower it | ||||
7046 | if (isFPImmLegal(FPVal, VT)) | ||||
7047 | return Op; | ||||
7048 | // Otherwise, construct as integer, and move to float register | ||||
7049 | APInt INTVal = FPVal.bitcastToAPInt(); | ||||
7050 | SDLoc DL(CFP); | ||||
7051 | switch (VT.getSimpleVT().SimpleTy) { | ||||
7052 | default: | ||||
7053 | llvm_unreachable("Unknown floating point type!")::llvm::llvm_unreachable_internal("Unknown floating point type!" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 7053); | ||||
7054 | break; | ||||
7055 | case MVT::f64: { | ||||
7056 | SDValue Lo = DAG.getConstant(INTVal.trunc(32), DL, MVT::i32); | ||||
7057 | SDValue Hi = DAG.getConstant(INTVal.lshr(32).trunc(32), DL, MVT::i32); | ||||
7058 | return DAG.getNode(ARMISD::VMOVDRR, DL, MVT::f64, Lo, Hi); | ||||
7059 | } | ||||
7060 | case MVT::f32: | ||||
7061 | return DAG.getNode(ARMISD::VMOVSR, DL, VT, | ||||
7062 | DAG.getConstant(INTVal, DL, MVT::i32)); | ||||
7063 | } | ||||
7064 | } | ||||
7065 | |||||
7066 | if (!ST->hasVFP3Base()) | ||||
7067 | return SDValue(); | ||||
7068 | |||||
7069 | // Use the default (constant pool) lowering for double constants when we have | ||||
7070 | // an SP-only FPU | ||||
7071 | if (IsDouble && !Subtarget->hasFP64()) | ||||
7072 | return SDValue(); | ||||
7073 | |||||
7074 | // Try splatting with a VMOV.f32... | ||||
7075 | int ImmVal = IsDouble ? ARM_AM::getFP64Imm(FPVal) : ARM_AM::getFP32Imm(FPVal); | ||||
7076 | |||||
7077 | if (ImmVal != -1) { | ||||
7078 | if (IsDouble || !ST->useNEONForSinglePrecisionFP()) { | ||||
7079 | // We have code in place to select a valid ConstantFP already, no need to | ||||
7080 | // do any mangling. | ||||
7081 | return Op; | ||||
7082 | } | ||||
7083 | |||||
7084 | // It's a float and we are trying to use NEON operations where | ||||
7085 | // possible. Lower it to a splat followed by an extract. | ||||
7086 | SDLoc DL(Op); | ||||
7087 | SDValue NewVal = DAG.getTargetConstant(ImmVal, DL, MVT::i32); | ||||
7088 | SDValue VecConstant = DAG.getNode(ARMISD::VMOVFPIMM, DL, MVT::v2f32, | ||||
7089 | NewVal); | ||||
7090 | return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, MVT::f32, VecConstant, | ||||
7091 | DAG.getConstant(0, DL, MVT::i32)); | ||||
7092 | } | ||||
7093 | |||||
7094 | // The rest of our options are NEON only, make sure that's allowed before | ||||
7095 | // proceeding.. | ||||
7096 | if (!ST->hasNEON() || (!IsDouble && !ST->useNEONForSinglePrecisionFP())) | ||||
7097 | return SDValue(); | ||||
7098 | |||||
7099 | EVT VMovVT; | ||||
7100 | uint64_t iVal = FPVal.bitcastToAPInt().getZExtValue(); | ||||
7101 | |||||
7102 | // It wouldn't really be worth bothering for doubles except for one very | ||||
7103 | // important value, which does happen to match: 0.0. So make sure we don't do | ||||
7104 | // anything stupid. | ||||
7105 | if (IsDouble && (iVal & 0xffffffff) != (iVal >> 32)) | ||||
7106 | return SDValue(); | ||||
7107 | |||||
7108 | // Try a VMOV.i32 (FIXME: i8, i16, or i64 could work too). | ||||
7109 | SDValue NewVal = isVMOVModifiedImm(iVal & 0xffffffffU, 0, 32, DAG, SDLoc(Op), | ||||
7110 | VMovVT, VT, VMOVModImm); | ||||
7111 | if (NewVal != SDValue()) { | ||||
7112 | SDLoc DL(Op); | ||||
7113 | SDValue VecConstant = DAG.getNode(ARMISD::VMOVIMM, DL, VMovVT, | ||||
7114 | NewVal); | ||||
7115 | if (IsDouble) | ||||
7116 | return DAG.getNode(ISD::BITCAST, DL, MVT::f64, VecConstant); | ||||
7117 | |||||
7118 | // It's a float: cast and extract a vector element. | ||||
7119 | SDValue VecFConstant = DAG.getNode(ISD::BITCAST, DL, MVT::v2f32, | ||||
7120 | VecConstant); | ||||
7121 | return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, MVT::f32, VecFConstant, | ||||
7122 | DAG.getConstant(0, DL, MVT::i32)); | ||||
7123 | } | ||||
7124 | |||||
7125 | // Finally, try a VMVN.i32 | ||||
7126 | NewVal = isVMOVModifiedImm(~iVal & 0xffffffffU, 0, 32, DAG, SDLoc(Op), VMovVT, | ||||
7127 | VT, VMVNModImm); | ||||
7128 | if (NewVal != SDValue()) { | ||||
7129 | SDLoc DL(Op); | ||||
7130 | SDValue VecConstant = DAG.getNode(ARMISD::VMVNIMM, DL, VMovVT, NewVal); | ||||
7131 | |||||
7132 | if (IsDouble) | ||||
7133 | return DAG.getNode(ISD::BITCAST, DL, MVT::f64, VecConstant); | ||||
7134 | |||||
7135 | // It's a float: cast and extract a vector element. | ||||
7136 | SDValue VecFConstant = DAG.getNode(ISD::BITCAST, DL, MVT::v2f32, | ||||
7137 | VecConstant); | ||||
7138 | return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, MVT::f32, VecFConstant, | ||||
7139 | DAG.getConstant(0, DL, MVT::i32)); | ||||
7140 | } | ||||
7141 | |||||
7142 | return SDValue(); | ||||
7143 | } | ||||
7144 | |||||
7145 | // check if an VEXT instruction can handle the shuffle mask when the | ||||
7146 | // vector sources of the shuffle are the same. | ||||
7147 | static bool isSingletonVEXTMask(ArrayRef<int> M, EVT VT, unsigned &Imm) { | ||||
7148 | unsigned NumElts = VT.getVectorNumElements(); | ||||
7149 | |||||
7150 | // Assume that the first shuffle index is not UNDEF. Fail if it is. | ||||
7151 | if (M[0] < 0) | ||||
7152 | return false; | ||||
7153 | |||||
7154 | Imm = M[0]; | ||||
7155 | |||||
7156 | // If this is a VEXT shuffle, the immediate value is the index of the first | ||||
7157 | // element. The other shuffle indices must be the successive elements after | ||||
7158 | // the first one. | ||||
7159 | unsigned ExpectedElt = Imm; | ||||
7160 | for (unsigned i = 1; i < NumElts; ++i) { | ||||
7161 | // Increment the expected index. If it wraps around, just follow it | ||||
7162 | // back to index zero and keep going. | ||||
7163 | ++ExpectedElt; | ||||
7164 | if (ExpectedElt == NumElts) | ||||
7165 | ExpectedElt = 0; | ||||
7166 | |||||
7167 | if (M[i] < 0) continue; // ignore UNDEF indices | ||||
7168 | if (ExpectedElt != static_cast<unsigned>(M[i])) | ||||
7169 | return false; | ||||
7170 | } | ||||
7171 | |||||
7172 | return true; | ||||
7173 | } | ||||
7174 | |||||
7175 | static bool isVEXTMask(ArrayRef<int> M, EVT VT, | ||||
7176 | bool &ReverseVEXT, unsigned &Imm) { | ||||
7177 | unsigned NumElts = VT.getVectorNumElements(); | ||||
7178 | ReverseVEXT = false; | ||||
7179 | |||||
7180 | // Assume that the first shuffle index is not UNDEF. Fail if it is. | ||||
7181 | if (M[0] < 0) | ||||
7182 | return false; | ||||
7183 | |||||
7184 | Imm = M[0]; | ||||
7185 | |||||
7186 | // If this is a VEXT shuffle, the immediate value is the index of the first | ||||
7187 | // element. The other shuffle indices must be the successive elements after | ||||
7188 | // the first one. | ||||
7189 | unsigned ExpectedElt = Imm; | ||||
7190 | for (unsigned i = 1; i < NumElts; ++i) { | ||||
7191 | // Increment the expected index. If it wraps around, it may still be | ||||
7192 | // a VEXT but the source vectors must be swapped. | ||||
7193 | ExpectedElt += 1; | ||||
7194 | if (ExpectedElt == NumElts * 2) { | ||||
7195 | ExpectedElt = 0; | ||||
7196 | ReverseVEXT = true; | ||||
7197 | } | ||||
7198 | |||||
7199 | if (M[i] < 0) continue; // ignore UNDEF indices | ||||
7200 | if (ExpectedElt != static_cast<unsigned>(M[i])) | ||||
7201 | return false; | ||||
7202 | } | ||||
7203 | |||||
7204 | // Adjust the index value if the source operands will be swapped. | ||||
7205 | if (ReverseVEXT) | ||||
7206 | Imm -= NumElts; | ||||
7207 | |||||
7208 | return true; | ||||
7209 | } | ||||
7210 | |||||
7211 | static bool isVTBLMask(ArrayRef<int> M, EVT VT) { | ||||
7212 | // We can handle <8 x i8> vector shuffles. If the index in the mask is out of | ||||
7213 | // range, then 0 is placed into the resulting vector. So pretty much any mask | ||||
7214 | // of 8 elements can work here. | ||||
7215 | return VT == MVT::v8i8 && M.size() == 8; | ||||
7216 | } | ||||
7217 | |||||
7218 | static unsigned SelectPairHalf(unsigned Elements, ArrayRef<int> Mask, | ||||
7219 | unsigned Index) { | ||||
7220 | if (Mask.size() == Elements * 2) | ||||
7221 | return Index / Elements; | ||||
7222 | return Mask[Index] == 0 ? 0 : 1; | ||||
7223 | } | ||||
7224 | |||||
7225 | // Checks whether the shuffle mask represents a vector transpose (VTRN) by | ||||
7226 | // checking that pairs of elements in the shuffle mask represent the same index | ||||
7227 | // in each vector, incrementing the expected index by 2 at each step. | ||||
7228 | // e.g. For v1,v2 of type v4i32 a valid shuffle mask is: [0, 4, 2, 6] | ||||
7229 | // v1={a,b,c,d} => x=shufflevector v1, v2 shufflemask => x={a,e,c,g} | ||||
7230 | // v2={e,f,g,h} | ||||
7231 | // WhichResult gives the offset for each element in the mask based on which | ||||
7232 | // of the two results it belongs to. | ||||
7233 | // | ||||
7234 | // The transpose can be represented either as: | ||||
7235 | // result1 = shufflevector v1, v2, result1_shuffle_mask | ||||
7236 | // result2 = shufflevector v1, v2, result2_shuffle_mask | ||||
7237 | // where v1/v2 and the shuffle masks have the same number of elements | ||||
7238 | // (here WhichResult (see below) indicates which result is being checked) | ||||
7239 | // | ||||
7240 | // or as: | ||||
7241 | // results = shufflevector v1, v2, shuffle_mask | ||||
7242 | // where both results are returned in one vector and the shuffle mask has twice | ||||
7243 | // as many elements as v1/v2 (here WhichResult will always be 0 if true) here we | ||||
7244 | // want to check the low half and high half of the shuffle mask as if it were | ||||
7245 | // the other case | ||||
7246 | static bool isVTRNMask(ArrayRef<int> M, EVT VT, unsigned &WhichResult) { | ||||
7247 | unsigned EltSz = VT.getScalarSizeInBits(); | ||||
7248 | if (EltSz == 64) | ||||
7249 | return false; | ||||
7250 | |||||
7251 | unsigned NumElts = VT.getVectorNumElements(); | ||||
7252 | if (M.size() != NumElts && M.size() != NumElts*2) | ||||
7253 | return false; | ||||
7254 | |||||
7255 | // If the mask is twice as long as the input vector then we need to check the | ||||
7256 | // upper and lower parts of the mask with a matching value for WhichResult | ||||
7257 | // FIXME: A mask with only even values will be rejected in case the first | ||||
7258 | // element is undefined, e.g. [-1, 4, 2, 6] will be rejected, because only | ||||
7259 | // M[0] is used to determine WhichResult | ||||
7260 | for (unsigned i = 0; i < M.size(); i += NumElts) { | ||||
7261 | WhichResult = SelectPairHalf(NumElts, M, i); | ||||
7262 | for (unsigned j = 0; j < NumElts; j += 2) { | ||||
7263 | if ((M[i+j] >= 0 && (unsigned) M[i+j] != j + WhichResult) || | ||||
7264 | (M[i+j+1] >= 0 && (unsigned) M[i+j+1] != j + NumElts + WhichResult)) | ||||
7265 | return false; | ||||
7266 | } | ||||
7267 | } | ||||
7268 | |||||
7269 | if (M.size() == NumElts*2) | ||||
7270 | WhichResult = 0; | ||||
7271 | |||||
7272 | return true; | ||||
7273 | } | ||||
7274 | |||||
7275 | /// isVTRN_v_undef_Mask - Special case of isVTRNMask for canonical form of | ||||
7276 | /// "vector_shuffle v, v", i.e., "vector_shuffle v, undef". | ||||
7277 | /// Mask is e.g., <0, 0, 2, 2> instead of <0, 4, 2, 6>. | ||||
7278 | static bool isVTRN_v_undef_Mask(ArrayRef<int> M, EVT VT, unsigned &WhichResult){ | ||||
7279 | unsigned EltSz = VT.getScalarSizeInBits(); | ||||
7280 | if (EltSz == 64) | ||||
7281 | return false; | ||||
7282 | |||||
7283 | unsigned NumElts = VT.getVectorNumElements(); | ||||
7284 | if (M.size() != NumElts && M.size() != NumElts*2) | ||||
7285 | return false; | ||||
7286 | |||||
7287 | for (unsigned i = 0; i < M.size(); i += NumElts) { | ||||
7288 | WhichResult = SelectPairHalf(NumElts, M, i); | ||||
7289 | for (unsigned j = 0; j < NumElts; j += 2) { | ||||
7290 | if ((M[i+j] >= 0 && (unsigned) M[i+j] != j + WhichResult) || | ||||
7291 | (M[i+j+1] >= 0 && (unsigned) M[i+j+1] != j + WhichResult)) | ||||
7292 | return false; | ||||
7293 | } | ||||
7294 | } | ||||
7295 | |||||
7296 | if (M.size() == NumElts*2) | ||||
7297 | WhichResult = 0; | ||||
7298 | |||||
7299 | return true; | ||||
7300 | } | ||||
7301 | |||||
7302 | // Checks whether the shuffle mask represents a vector unzip (VUZP) by checking | ||||
7303 | // that the mask elements are either all even and in steps of size 2 or all odd | ||||
7304 | // and in steps of size 2. | ||||
7305 | // e.g. For v1,v2 of type v4i32 a valid shuffle mask is: [0, 2, 4, 6] | ||||
7306 | // v1={a,b,c,d} => x=shufflevector v1, v2 shufflemask => x={a,c,e,g} | ||||
7307 | // v2={e,f,g,h} | ||||
7308 | // Requires similar checks to that of isVTRNMask with | ||||
7309 | // respect the how results are returned. | ||||
7310 | static bool isVUZPMask(ArrayRef<int> M, EVT VT, unsigned &WhichResult) { | ||||
7311 | unsigned EltSz = VT.getScalarSizeInBits(); | ||||
7312 | if (EltSz == 64) | ||||
7313 | return false; | ||||
7314 | |||||
7315 | unsigned NumElts = VT.getVectorNumElements(); | ||||
7316 | if (M.size() != NumElts && M.size() != NumElts*2) | ||||
7317 | return false; | ||||
7318 | |||||
7319 | for (unsigned i = 0; i < M.size(); i += NumElts) { | ||||
7320 | WhichResult = SelectPairHalf(NumElts, M, i); | ||||
7321 | for (unsigned j = 0; j < NumElts; ++j) { | ||||
7322 | if (M[i+j] >= 0 && (unsigned) M[i+j] != 2 * j + WhichResult) | ||||
7323 | return false; | ||||
7324 | } | ||||
7325 | } | ||||
7326 | |||||
7327 | if (M.size() == NumElts*2) | ||||
7328 | WhichResult = 0; | ||||
7329 | |||||
7330 | // VUZP.32 for 64-bit vectors is a pseudo-instruction alias for VTRN.32. | ||||
7331 | if (VT.is64BitVector() && EltSz == 32) | ||||
7332 | return false; | ||||
7333 | |||||
7334 | return true; | ||||
7335 | } | ||||
7336 | |||||
7337 | /// isVUZP_v_undef_Mask - Special case of isVUZPMask for canonical form of | ||||
7338 | /// "vector_shuffle v, v", i.e., "vector_shuffle v, undef". | ||||
7339 | /// Mask is e.g., <0, 2, 0, 2> instead of <0, 2, 4, 6>, | ||||
7340 | static bool isVUZP_v_undef_Mask(ArrayRef<int> M, EVT VT, unsigned &WhichResult){ | ||||
7341 | unsigned EltSz = VT.getScalarSizeInBits(); | ||||
7342 | if (EltSz == 64) | ||||
7343 | return false; | ||||
7344 | |||||
7345 | unsigned NumElts = VT.getVectorNumElements(); | ||||
7346 | if (M.size() != NumElts && M.size() != NumElts*2) | ||||
7347 | return false; | ||||
7348 | |||||
7349 | unsigned Half = NumElts / 2; | ||||
7350 | for (unsigned i = 0; i < M.size(); i += NumElts) { | ||||
7351 | WhichResult = SelectPairHalf(NumElts, M, i); | ||||
7352 | for (unsigned j = 0; j < NumElts; j += Half) { | ||||
7353 | unsigned Idx = WhichResult; | ||||
7354 | for (unsigned k = 0; k < Half; ++k) { | ||||
7355 | int MIdx = M[i + j + k]; | ||||
7356 | if (MIdx >= 0 && (unsigned) MIdx != Idx) | ||||
7357 | return false; | ||||
7358 | Idx += 2; | ||||
7359 | } | ||||
7360 | } | ||||
7361 | } | ||||
7362 | |||||
7363 | if (M.size() == NumElts*2) | ||||
7364 | WhichResult = 0; | ||||
7365 | |||||
7366 | // VUZP.32 for 64-bit vectors is a pseudo-instruction alias for VTRN.32. | ||||
7367 | if (VT.is64BitVector() && EltSz == 32) | ||||
7368 | return false; | ||||
7369 | |||||
7370 | return true; | ||||
7371 | } | ||||
7372 | |||||
7373 | // Checks whether the shuffle mask represents a vector zip (VZIP) by checking | ||||
7374 | // that pairs of elements of the shufflemask represent the same index in each | ||||
7375 | // vector incrementing sequentially through the vectors. | ||||
7376 | // e.g. For v1,v2 of type v4i32 a valid shuffle mask is: [0, 4, 1, 5] | ||||
7377 | // v1={a,b,c,d} => x=shufflevector v1, v2 shufflemask => x={a,e,b,f} | ||||
7378 | // v2={e,f,g,h} | ||||
7379 | // Requires similar checks to that of isVTRNMask with respect the how results | ||||
7380 | // are returned. | ||||
7381 | static bool isVZIPMask(ArrayRef<int> M, EVT VT, unsigned &WhichResult) { | ||||
7382 | unsigned EltSz = VT.getScalarSizeInBits(); | ||||
7383 | if (EltSz == 64) | ||||
7384 | return false; | ||||
7385 | |||||
7386 | unsigned NumElts = VT.getVectorNumElements(); | ||||
7387 | if (M.size() != NumElts && M.size() != NumElts*2) | ||||
7388 | return false; | ||||
7389 | |||||
7390 | for (unsigned i = 0; i < M.size(); i += NumElts) { | ||||
7391 | WhichResult = SelectPairHalf(NumElts, M, i); | ||||
7392 | unsigned Idx = WhichResult * NumElts / 2; | ||||
7393 | for (unsigned j = 0; j < NumElts; j += 2) { | ||||
7394 | if ((M[i+j] >= 0 && (unsigned) M[i+j] != Idx) || | ||||
7395 | (M[i+j+1] >= 0 && (unsigned) M[i+j+1] != Idx + NumElts)) | ||||
7396 | return false; | ||||
7397 | Idx += 1; | ||||
7398 | } | ||||
7399 | } | ||||
7400 | |||||
7401 | if (M.size() == NumElts*2) | ||||
7402 | WhichResult = 0; | ||||
7403 | |||||
7404 | // VZIP.32 for 64-bit vectors is a pseudo-instruction alias for VTRN.32. | ||||
7405 | if (VT.is64BitVector() && EltSz == 32) | ||||
7406 | return false; | ||||
7407 | |||||
7408 | return true; | ||||
7409 | } | ||||
7410 | |||||
7411 | /// isVZIP_v_undef_Mask - Special case of isVZIPMask for canonical form of | ||||
7412 | /// "vector_shuffle v, v", i.e., "vector_shuffle v, undef". | ||||
7413 | /// Mask is e.g., <0, 0, 1, 1> instead of <0, 4, 1, 5>. | ||||
7414 | static bool isVZIP_v_undef_Mask(ArrayRef<int> M, EVT VT, unsigned &WhichResult){ | ||||
7415 | unsigned EltSz = VT.getScalarSizeInBits(); | ||||
7416 | if (EltSz == 64) | ||||
7417 | return false; | ||||
7418 | |||||
7419 | unsigned NumElts = VT.getVectorNumElements(); | ||||
7420 | if (M.size() != NumElts && M.size() != NumElts*2) | ||||
7421 | return false; | ||||
7422 | |||||
7423 | for (unsigned i = 0; i < M.size(); i += NumElts) { | ||||
7424 | WhichResult = SelectPairHalf(NumElts, M, i); | ||||
7425 | unsigned Idx = WhichResult * NumElts / 2; | ||||
7426 | for (unsigned j = 0; j < NumElts; j += 2) { | ||||
7427 | if ((M[i+j] >= 0 && (unsigned) M[i+j] != Idx) || | ||||
7428 | (M[i+j+1] >= 0 && (unsigned) M[i+j+1] != Idx)) | ||||
7429 | return false; | ||||
7430 | Idx += 1; | ||||
7431 | } | ||||
7432 | } | ||||
7433 | |||||
7434 | if (M.size() == NumElts*2) | ||||
7435 | WhichResult = 0; | ||||
7436 | |||||
7437 | // VZIP.32 for 64-bit vectors is a pseudo-instruction alias for VTRN.32. | ||||
7438 | if (VT.is64BitVector() && EltSz == 32) | ||||
7439 | return false; | ||||
7440 | |||||
7441 | return true; | ||||
7442 | } | ||||
7443 | |||||
7444 | /// Check if \p ShuffleMask is a NEON two-result shuffle (VZIP, VUZP, VTRN), | ||||
7445 | /// and return the corresponding ARMISD opcode if it is, or 0 if it isn't. | ||||
7446 | static unsigned isNEONTwoResultShuffleMask(ArrayRef<int> ShuffleMask, EVT VT, | ||||
7447 | unsigned &WhichResult, | ||||
7448 | bool &isV_UNDEF) { | ||||
7449 | isV_UNDEF = false; | ||||
7450 | if (isVTRNMask(ShuffleMask, VT, WhichResult)) | ||||
7451 | return ARMISD::VTRN; | ||||
7452 | if (isVUZPMask(ShuffleMask, VT, WhichResult)) | ||||
7453 | return ARMISD::VUZP; | ||||
7454 | if (isVZIPMask(ShuffleMask, VT, WhichResult)) | ||||
7455 | return ARMISD::VZIP; | ||||
7456 | |||||
7457 | isV_UNDEF = true; | ||||
7458 | if (isVTRN_v_undef_Mask(ShuffleMask, VT, WhichResult)) | ||||
7459 | return ARMISD::VTRN; | ||||
7460 | if (isVUZP_v_undef_Mask(ShuffleMask, VT, WhichResult)) | ||||
7461 | return ARMISD::VUZP; | ||||
7462 | if (isVZIP_v_undef_Mask(ShuffleMask, VT, WhichResult)) | ||||
7463 | return ARMISD::VZIP; | ||||
7464 | |||||
7465 | return 0; | ||||
7466 | } | ||||
7467 | |||||
7468 | /// \return true if this is a reverse operation on an vector. | ||||
7469 | static bool isReverseMask(ArrayRef<int> M, EVT VT) { | ||||
7470 | unsigned NumElts = VT.getVectorNumElements(); | ||||
7471 | // Make sure the mask has the right size. | ||||
7472 | if (NumElts != M.size()) | ||||
7473 | return false; | ||||
7474 | |||||
7475 | // Look for <15, ..., 3, -1, 1, 0>. | ||||
7476 | for (unsigned i = 0; i != NumElts; ++i) | ||||
7477 | if (M[i] >= 0 && M[i] != (int) (NumElts - 1 - i)) | ||||
7478 | return false; | ||||
7479 | |||||
7480 | return true; | ||||
7481 | } | ||||
7482 | |||||
7483 | static bool isVMOVNMask(ArrayRef<int> M, EVT VT, bool Top, bool SingleSource) { | ||||
7484 | unsigned NumElts = VT.getVectorNumElements(); | ||||
7485 | // Make sure the mask has the right size. | ||||
7486 | if (NumElts != M.size() || (VT != MVT::v8i16 && VT != MVT::v16i8)) | ||||
7487 | return false; | ||||
7488 | |||||
7489 | // If Top | ||||
7490 | // Look for <0, N, 2, N+2, 4, N+4, ..>. | ||||
7491 | // This inserts Input2 into Input1 | ||||
7492 | // else if not Top | ||||
7493 | // Look for <0, N+1, 2, N+3, 4, N+5, ..> | ||||
7494 | // This inserts Input1 into Input2 | ||||
7495 | unsigned Offset = Top ? 0 : 1; | ||||
7496 | unsigned N = SingleSource ? 0 : NumElts; | ||||
7497 | for (unsigned i = 0; i < NumElts; i += 2) { | ||||
7498 | if (M[i] >= 0 && M[i] != (int)i) | ||||
7499 | return false; | ||||
7500 | if (M[i + 1] >= 0 && M[i + 1] != (int)(N + i + Offset)) | ||||
7501 | return false; | ||||
7502 | } | ||||
7503 | |||||
7504 | return true; | ||||
7505 | } | ||||
7506 | |||||
7507 | static bool isVMOVNTruncMask(ArrayRef<int> M, EVT ToVT, bool rev) { | ||||
7508 | unsigned NumElts = ToVT.getVectorNumElements(); | ||||
7509 | if (NumElts != M.size()) | ||||
7510 | return false; | ||||
7511 | |||||
7512 | // Test if the Trunc can be convertable to a VMOVN with this shuffle. We are | ||||
7513 | // looking for patterns of: | ||||
7514 | // !rev: 0 N/2 1 N/2+1 2 N/2+2 ... | ||||
7515 | // rev: N/2 0 N/2+1 1 N/2+2 2 ... | ||||
7516 | |||||
7517 | unsigned Off0 = rev ? NumElts / 2 : 0; | ||||
7518 | unsigned Off1 = rev ? 0 : NumElts / 2; | ||||
7519 | for (unsigned i = 0; i < NumElts; i += 2) { | ||||
7520 | if (M[i] >= 0 && M[i] != (int)(Off0 + i / 2)) | ||||
7521 | return false; | ||||
7522 | if (M[i + 1] >= 0 && M[i + 1] != (int)(Off1 + i / 2)) | ||||
7523 | return false; | ||||
7524 | } | ||||
7525 | |||||
7526 | return true; | ||||
7527 | } | ||||
7528 | |||||
7529 | // Reconstruct an MVE VCVT from a BuildVector of scalar fptrunc, all extracted | ||||
7530 | // from a pair of inputs. For example: | ||||
7531 | // BUILDVECTOR(FP_ROUND(EXTRACT_ELT(X, 0), | ||||
7532 | // FP_ROUND(EXTRACT_ELT(Y, 0), | ||||
7533 | // FP_ROUND(EXTRACT_ELT(X, 1), | ||||
7534 | // FP_ROUND(EXTRACT_ELT(Y, 1), ...) | ||||
7535 | static SDValue LowerBuildVectorOfFPTrunc(SDValue BV, SelectionDAG &DAG, | ||||
7536 | const ARMSubtarget *ST) { | ||||
7537 | assert(BV.getOpcode() == ISD::BUILD_VECTOR && "Unknown opcode!")(static_cast <bool> (BV.getOpcode() == ISD::BUILD_VECTOR && "Unknown opcode!") ? void (0) : __assert_fail ("BV.getOpcode() == ISD::BUILD_VECTOR && \"Unknown opcode!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 7537, __extension__ __PRETTY_FUNCTION__)); | ||||
7538 | if (!ST->hasMVEFloatOps()) | ||||
7539 | return SDValue(); | ||||
7540 | |||||
7541 | SDLoc dl(BV); | ||||
7542 | EVT VT = BV.getValueType(); | ||||
7543 | if (VT != MVT::v8f16) | ||||
7544 | return SDValue(); | ||||
7545 | |||||
7546 | // We are looking for a buildvector of fptrunc elements, where all the | ||||
7547 | // elements are interleavingly extracted from two sources. Check the first two | ||||
7548 | // items are valid enough and extract some info from them (they are checked | ||||
7549 | // properly in the loop below). | ||||
7550 | if (BV.getOperand(0).getOpcode() != ISD::FP_ROUND || | ||||
7551 | BV.getOperand(0).getOperand(0).getOpcode() != ISD::EXTRACT_VECTOR_ELT || | ||||
7552 | BV.getOperand(0).getOperand(0).getConstantOperandVal(1) != 0) | ||||
7553 | return SDValue(); | ||||
7554 | if (BV.getOperand(1).getOpcode() != ISD::FP_ROUND || | ||||
7555 | BV.getOperand(1).getOperand(0).getOpcode() != ISD::EXTRACT_VECTOR_ELT || | ||||
7556 | BV.getOperand(1).getOperand(0).getConstantOperandVal(1) != 0) | ||||
7557 | return SDValue(); | ||||
7558 | SDValue Op0 = BV.getOperand(0).getOperand(0).getOperand(0); | ||||
7559 | SDValue Op1 = BV.getOperand(1).getOperand(0).getOperand(0); | ||||
7560 | if (Op0.getValueType() != MVT::v4f32 || Op1.getValueType() != MVT::v4f32) | ||||
7561 | return SDValue(); | ||||
7562 | |||||
7563 | // Check all the values in the BuildVector line up with our expectations. | ||||
7564 | for (unsigned i = 1; i < 4; i++) { | ||||
7565 | auto Check = [](SDValue Trunc, SDValue Op, unsigned Idx) { | ||||
7566 | return Trunc.getOpcode() == ISD::FP_ROUND && | ||||
7567 | Trunc.getOperand(0).getOpcode() == ISD::EXTRACT_VECTOR_ELT && | ||||
7568 | Trunc.getOperand(0).getOperand(0) == Op && | ||||
7569 | Trunc.getOperand(0).getConstantOperandVal(1) == Idx; | ||||
7570 | }; | ||||
7571 | if (!Check(BV.getOperand(i * 2 + 0), Op0, i)) | ||||
7572 | return SDValue(); | ||||
7573 | if (!Check(BV.getOperand(i * 2 + 1), Op1, i)) | ||||
7574 | return SDValue(); | ||||
7575 | } | ||||
7576 | |||||
7577 | SDValue N1 = DAG.getNode(ARMISD::VCVTN, dl, VT, DAG.getUNDEF(VT), Op0, | ||||
7578 | DAG.getConstant(0, dl, MVT::i32)); | ||||
7579 | return DAG.getNode(ARMISD::VCVTN, dl, VT, N1, Op1, | ||||
7580 | DAG.getConstant(1, dl, MVT::i32)); | ||||
7581 | } | ||||
7582 | |||||
7583 | // Reconstruct an MVE VCVT from a BuildVector of scalar fpext, all extracted | ||||
7584 | // from a single input on alternating lanes. For example: | ||||
7585 | // BUILDVECTOR(FP_ROUND(EXTRACT_ELT(X, 0), | ||||
7586 | // FP_ROUND(EXTRACT_ELT(X, 2), | ||||
7587 | // FP_ROUND(EXTRACT_ELT(X, 4), ...) | ||||
7588 | static SDValue LowerBuildVectorOfFPExt(SDValue BV, SelectionDAG &DAG, | ||||
7589 | const ARMSubtarget *ST) { | ||||
7590 | assert(BV.getOpcode() == ISD::BUILD_VECTOR && "Unknown opcode!")(static_cast <bool> (BV.getOpcode() == ISD::BUILD_VECTOR && "Unknown opcode!") ? void (0) : __assert_fail ("BV.getOpcode() == ISD::BUILD_VECTOR && \"Unknown opcode!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 7590, __extension__ __PRETTY_FUNCTION__)); | ||||
7591 | if (!ST->hasMVEFloatOps()) | ||||
7592 | return SDValue(); | ||||
7593 | |||||
7594 | SDLoc dl(BV); | ||||
7595 | EVT VT = BV.getValueType(); | ||||
7596 | if (VT != MVT::v4f32) | ||||
7597 | return SDValue(); | ||||
7598 | |||||
7599 | // We are looking for a buildvector of fptext elements, where all the | ||||
7600 | // elements are alternating lanes from a single source. For example <0,2,4,6> | ||||
7601 | // or <1,3,5,7>. Check the first two items are valid enough and extract some | ||||
7602 | // info from them (they are checked properly in the loop below). | ||||
7603 | if (BV.getOperand(0).getOpcode() != ISD::FP_EXTEND || | ||||
7604 | BV.getOperand(0).getOperand(0).getOpcode() != ISD::EXTRACT_VECTOR_ELT) | ||||
7605 | return SDValue(); | ||||
7606 | SDValue Op0 = BV.getOperand(0).getOperand(0).getOperand(0); | ||||
7607 | int Offset = BV.getOperand(0).getOperand(0).getConstantOperandVal(1); | ||||
7608 | if (Op0.getValueType() != MVT::v8f16 || (Offset != 0 && Offset != 1)) | ||||
7609 | return SDValue(); | ||||
7610 | |||||
7611 | // Check all the values in the BuildVector line up with our expectations. | ||||
7612 | for (unsigned i = 1; i < 4; i++) { | ||||
7613 | auto Check = [](SDValue Trunc, SDValue Op, unsigned Idx) { | ||||
7614 | return Trunc.getOpcode() == ISD::FP_EXTEND && | ||||
7615 | Trunc.getOperand(0).getOpcode() == ISD::EXTRACT_VECTOR_ELT && | ||||
7616 | Trunc.getOperand(0).getOperand(0) == Op && | ||||
7617 | Trunc.getOperand(0).getConstantOperandVal(1) == Idx; | ||||
7618 | }; | ||||
7619 | if (!Check(BV.getOperand(i), Op0, 2 * i + Offset)) | ||||
7620 | return SDValue(); | ||||
7621 | } | ||||
7622 | |||||
7623 | return DAG.getNode(ARMISD::VCVTL, dl, VT, Op0, | ||||
7624 | DAG.getConstant(Offset, dl, MVT::i32)); | ||||
7625 | } | ||||
7626 | |||||
7627 | // If N is an integer constant that can be moved into a register in one | ||||
7628 | // instruction, return an SDValue of such a constant (will become a MOV | ||||
7629 | // instruction). Otherwise return null. | ||||
7630 | static SDValue IsSingleInstrConstant(SDValue N, SelectionDAG &DAG, | ||||
7631 | const ARMSubtarget *ST, const SDLoc &dl) { | ||||
7632 | uint64_t Val; | ||||
7633 | if (!isa<ConstantSDNode>(N)) | ||||
7634 | return SDValue(); | ||||
7635 | Val = cast<ConstantSDNode>(N)->getZExtValue(); | ||||
7636 | |||||
7637 | if (ST->isThumb1Only()) { | ||||
7638 | if (Val <= 255 || ~Val <= 255) | ||||
7639 | return DAG.getConstant(Val, dl, MVT::i32); | ||||
7640 | } else { | ||||
7641 | if (ARM_AM::getSOImmVal(Val) != -1 || ARM_AM::getSOImmVal(~Val) != -1) | ||||
7642 | return DAG.getConstant(Val, dl, MVT::i32); | ||||
7643 | } | ||||
7644 | return SDValue(); | ||||
7645 | } | ||||
7646 | |||||
7647 | static SDValue LowerBUILD_VECTOR_i1(SDValue Op, SelectionDAG &DAG, | ||||
7648 | const ARMSubtarget *ST) { | ||||
7649 | SDLoc dl(Op); | ||||
7650 | EVT VT = Op.getValueType(); | ||||
7651 | |||||
7652 | assert(ST->hasMVEIntegerOps() && "LowerBUILD_VECTOR_i1 called without MVE!")(static_cast <bool> (ST->hasMVEIntegerOps() && "LowerBUILD_VECTOR_i1 called without MVE!") ? void (0) : __assert_fail ("ST->hasMVEIntegerOps() && \"LowerBUILD_VECTOR_i1 called without MVE!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 7652, __extension__ __PRETTY_FUNCTION__)); | ||||
7653 | |||||
7654 | unsigned NumElts = VT.getVectorNumElements(); | ||||
7655 | unsigned BoolMask; | ||||
7656 | unsigned BitsPerBool; | ||||
7657 | if (NumElts == 2) { | ||||
7658 | BitsPerBool = 8; | ||||
7659 | BoolMask = 0xff; | ||||
7660 | } else if (NumElts == 4) { | ||||
7661 | BitsPerBool = 4; | ||||
7662 | BoolMask = 0xf; | ||||
7663 | } else if (NumElts == 8) { | ||||
7664 | BitsPerBool = 2; | ||||
7665 | BoolMask = 0x3; | ||||
7666 | } else if (NumElts == 16) { | ||||
7667 | BitsPerBool = 1; | ||||
7668 | BoolMask = 0x1; | ||||
7669 | } else | ||||
7670 | return SDValue(); | ||||
7671 | |||||
7672 | // If this is a single value copied into all lanes (a splat), we can just sign | ||||
7673 | // extend that single value | ||||
7674 | SDValue FirstOp = Op.getOperand(0); | ||||
7675 | if (!isa<ConstantSDNode>(FirstOp) && | ||||
7676 | std::all_of(std::next(Op->op_begin()), Op->op_end(), | ||||
7677 | [&FirstOp](SDUse &U) { | ||||
7678 | return U.get().isUndef() || U.get() == FirstOp; | ||||
7679 | })) { | ||||
7680 | SDValue Ext = DAG.getNode(ISD::SIGN_EXTEND_INREG, dl, MVT::i32, FirstOp, | ||||
7681 | DAG.getValueType(MVT::i1)); | ||||
7682 | return DAG.getNode(ARMISD::PREDICATE_CAST, dl, Op.getValueType(), Ext); | ||||
7683 | } | ||||
7684 | |||||
7685 | // First create base with bits set where known | ||||
7686 | unsigned Bits32 = 0; | ||||
7687 | for (unsigned i = 0; i < NumElts; ++i) { | ||||
7688 | SDValue V = Op.getOperand(i); | ||||
7689 | if (!isa<ConstantSDNode>(V) && !V.isUndef()) | ||||
7690 | continue; | ||||
7691 | bool BitSet = V.isUndef() ? false : cast<ConstantSDNode>(V)->getZExtValue(); | ||||
7692 | if (BitSet) | ||||
7693 | Bits32 |= BoolMask << (i * BitsPerBool); | ||||
7694 | } | ||||
7695 | |||||
7696 | // Add in unknown nodes | ||||
7697 | SDValue Base = DAG.getNode(ARMISD::PREDICATE_CAST, dl, VT, | ||||
7698 | DAG.getConstant(Bits32, dl, MVT::i32)); | ||||
7699 | for (unsigned i = 0; i < NumElts; ++i) { | ||||
7700 | SDValue V = Op.getOperand(i); | ||||
7701 | if (isa<ConstantSDNode>(V) || V.isUndef()) | ||||
7702 | continue; | ||||
7703 | Base = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VT, Base, V, | ||||
7704 | DAG.getConstant(i, dl, MVT::i32)); | ||||
7705 | } | ||||
7706 | |||||
7707 | return Base; | ||||
7708 | } | ||||
7709 | |||||
7710 | static SDValue LowerBUILD_VECTORToVIDUP(SDValue Op, SelectionDAG &DAG, | ||||
7711 | const ARMSubtarget *ST) { | ||||
7712 | if (!ST->hasMVEIntegerOps()) | ||||
7713 | return SDValue(); | ||||
7714 | |||||
7715 | // We are looking for a buildvector where each element is Op[0] + i*N | ||||
7716 | EVT VT = Op.getValueType(); | ||||
7717 | SDValue Op0 = Op.getOperand(0); | ||||
7718 | unsigned NumElts = VT.getVectorNumElements(); | ||||
7719 | |||||
7720 | // Get the increment value from operand 1 | ||||
7721 | SDValue Op1 = Op.getOperand(1); | ||||
7722 | if (Op1.getOpcode() != ISD::ADD || Op1.getOperand(0) != Op0 || | ||||
7723 | !isa<ConstantSDNode>(Op1.getOperand(1))) | ||||
7724 | return SDValue(); | ||||
7725 | unsigned N = Op1.getConstantOperandVal(1); | ||||
7726 | if (N != 1 && N != 2 && N != 4 && N != 8) | ||||
7727 | return SDValue(); | ||||
7728 | |||||
7729 | // Check that each other operand matches | ||||
7730 | for (unsigned I = 2; I < NumElts; I++) { | ||||
7731 | SDValue OpI = Op.getOperand(I); | ||||
7732 | if (OpI.getOpcode() != ISD::ADD || OpI.getOperand(0) != Op0 || | ||||
7733 | !isa<ConstantSDNode>(OpI.getOperand(1)) || | ||||
7734 | OpI.getConstantOperandVal(1) != I * N) | ||||
7735 | return SDValue(); | ||||
7736 | } | ||||
7737 | |||||
7738 | SDLoc DL(Op); | ||||
7739 | return DAG.getNode(ARMISD::VIDUP, DL, DAG.getVTList(VT, MVT::i32), Op0, | ||||
7740 | DAG.getConstant(N, DL, MVT::i32)); | ||||
7741 | } | ||||
7742 | |||||
7743 | // Returns true if the operation N can be treated as qr instruction variant at | ||||
7744 | // operand Op. | ||||
7745 | static bool IsQRMVEInstruction(const SDNode *N, const SDNode *Op) { | ||||
7746 | switch (N->getOpcode()) { | ||||
7747 | case ISD::ADD: | ||||
7748 | case ISD::MUL: | ||||
7749 | case ISD::SADDSAT: | ||||
7750 | case ISD::UADDSAT: | ||||
7751 | return true; | ||||
7752 | case ISD::SUB: | ||||
7753 | case ISD::SSUBSAT: | ||||
7754 | case ISD::USUBSAT: | ||||
7755 | return N->getOperand(1).getNode() == Op; | ||||
7756 | case ISD::INTRINSIC_WO_CHAIN: | ||||
7757 | switch (N->getConstantOperandVal(0)) { | ||||
7758 | case Intrinsic::arm_mve_add_predicated: | ||||
7759 | case Intrinsic::arm_mve_mul_predicated: | ||||
7760 | case Intrinsic::arm_mve_qadd_predicated: | ||||
7761 | case Intrinsic::arm_mve_vhadd: | ||||
7762 | case Intrinsic::arm_mve_hadd_predicated: | ||||
7763 | case Intrinsic::arm_mve_vqdmulh: | ||||
7764 | case Intrinsic::arm_mve_qdmulh_predicated: | ||||
7765 | case Intrinsic::arm_mve_vqrdmulh: | ||||
7766 | case Intrinsic::arm_mve_qrdmulh_predicated: | ||||
7767 | case Intrinsic::arm_mve_vqdmull: | ||||
7768 | case Intrinsic::arm_mve_vqdmull_predicated: | ||||
7769 | return true; | ||||
7770 | case Intrinsic::arm_mve_sub_predicated: | ||||
7771 | case Intrinsic::arm_mve_qsub_predicated: | ||||
7772 | case Intrinsic::arm_mve_vhsub: | ||||
7773 | case Intrinsic::arm_mve_hsub_predicated: | ||||
7774 | return N->getOperand(2).getNode() == Op; | ||||
7775 | default: | ||||
7776 | return false; | ||||
7777 | } | ||||
7778 | default: | ||||
7779 | return false; | ||||
7780 | } | ||||
7781 | } | ||||
7782 | |||||
7783 | // If this is a case we can't handle, return null and let the default | ||||
7784 | // expansion code take care of it. | ||||
7785 | SDValue ARMTargetLowering::LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG, | ||||
7786 | const ARMSubtarget *ST) const { | ||||
7787 | BuildVectorSDNode *BVN = cast<BuildVectorSDNode>(Op.getNode()); | ||||
7788 | SDLoc dl(Op); | ||||
7789 | EVT VT = Op.getValueType(); | ||||
7790 | |||||
7791 | if (ST->hasMVEIntegerOps() && VT.getScalarSizeInBits() == 1) | ||||
7792 | return LowerBUILD_VECTOR_i1(Op, DAG, ST); | ||||
7793 | |||||
7794 | if (SDValue R = LowerBUILD_VECTORToVIDUP(Op, DAG, ST)) | ||||
7795 | return R; | ||||
7796 | |||||
7797 | APInt SplatBits, SplatUndef; | ||||
7798 | unsigned SplatBitSize; | ||||
7799 | bool HasAnyUndefs; | ||||
7800 | if (BVN->isConstantSplat(SplatBits, SplatUndef, SplatBitSize, HasAnyUndefs)) { | ||||
7801 | if (SplatUndef.isAllOnes()) | ||||
7802 | return DAG.getUNDEF(VT); | ||||
7803 | |||||
7804 | // If all the users of this constant splat are qr instruction variants, | ||||
7805 | // generate a vdup of the constant. | ||||
7806 | if (ST->hasMVEIntegerOps() && VT.getScalarSizeInBits() == SplatBitSize && | ||||
7807 | (SplatBitSize == 8 || SplatBitSize == 16 || SplatBitSize == 32) && | ||||
7808 | all_of(BVN->uses(), | ||||
7809 | [BVN](const SDNode *U) { return IsQRMVEInstruction(U, BVN); })) { | ||||
7810 | EVT DupVT = SplatBitSize == 32 ? MVT::v4i32 | ||||
7811 | : SplatBitSize == 16 ? MVT::v8i16 | ||||
7812 | : MVT::v16i8; | ||||
7813 | SDValue Const = DAG.getConstant(SplatBits.getZExtValue(), dl, MVT::i32); | ||||
7814 | SDValue VDup = DAG.getNode(ARMISD::VDUP, dl, DupVT, Const); | ||||
7815 | return DAG.getNode(ARMISD::VECTOR_REG_CAST, dl, VT, VDup); | ||||
7816 | } | ||||
7817 | |||||
7818 | if ((ST->hasNEON() && SplatBitSize <= 64) || | ||||
7819 | (ST->hasMVEIntegerOps() && SplatBitSize <= 64)) { | ||||
7820 | // Check if an immediate VMOV works. | ||||
7821 | EVT VmovVT; | ||||
7822 | SDValue Val = | ||||
7823 | isVMOVModifiedImm(SplatBits.getZExtValue(), SplatUndef.getZExtValue(), | ||||
7824 | SplatBitSize, DAG, dl, VmovVT, VT, VMOVModImm); | ||||
7825 | |||||
7826 | if (Val.getNode()) { | ||||
7827 | SDValue Vmov = DAG.getNode(ARMISD::VMOVIMM, dl, VmovVT, Val); | ||||
7828 | return DAG.getNode(ISD::BITCAST, dl, VT, Vmov); | ||||
7829 | } | ||||
7830 | |||||
7831 | // Try an immediate VMVN. | ||||
7832 | uint64_t NegatedImm = (~SplatBits).getZExtValue(); | ||||
7833 | Val = isVMOVModifiedImm( | ||||
7834 | NegatedImm, SplatUndef.getZExtValue(), SplatBitSize, DAG, dl, VmovVT, | ||||
7835 | VT, ST->hasMVEIntegerOps() ? MVEVMVNModImm : VMVNModImm); | ||||
7836 | if (Val.getNode()) { | ||||
7837 | SDValue Vmov = DAG.getNode(ARMISD::VMVNIMM, dl, VmovVT, Val); | ||||
7838 | return DAG.getNode(ISD::BITCAST, dl, VT, Vmov); | ||||
7839 | } | ||||
7840 | |||||
7841 | // Use vmov.f32 to materialize other v2f32 and v4f32 splats. | ||||
7842 | if ((VT == MVT::v2f32 || VT == MVT::v4f32) && SplatBitSize == 32) { | ||||
7843 | int ImmVal = ARM_AM::getFP32Imm(SplatBits); | ||||
7844 | if (ImmVal != -1) { | ||||
7845 | SDValue Val = DAG.getTargetConstant(ImmVal, dl, MVT::i32); | ||||
7846 | return DAG.getNode(ARMISD::VMOVFPIMM, dl, VT, Val); | ||||
7847 | } | ||||
7848 | } | ||||
7849 | |||||
7850 | // If we are under MVE, generate a VDUP(constant), bitcast to the original | ||||
7851 | // type. | ||||
7852 | if (ST->hasMVEIntegerOps() && | ||||
7853 | (SplatBitSize == 8 || SplatBitSize == 16 || SplatBitSize == 32)) { | ||||
7854 | EVT DupVT = SplatBitSize == 32 ? MVT::v4i32 | ||||
7855 | : SplatBitSize == 16 ? MVT::v8i16 | ||||
7856 | : MVT::v16i8; | ||||
7857 | SDValue Const = DAG.getConstant(SplatBits.getZExtValue(), dl, MVT::i32); | ||||
7858 | SDValue VDup = DAG.getNode(ARMISD::VDUP, dl, DupVT, Const); | ||||
7859 | return DAG.getNode(ARMISD::VECTOR_REG_CAST, dl, VT, VDup); | ||||
7860 | } | ||||
7861 | } | ||||
7862 | } | ||||
7863 | |||||
7864 | // Scan through the operands to see if only one value is used. | ||||
7865 | // | ||||
7866 | // As an optimisation, even if more than one value is used it may be more | ||||
7867 | // profitable to splat with one value then change some lanes. | ||||
7868 | // | ||||
7869 | // Heuristically we decide to do this if the vector has a "dominant" value, | ||||
7870 | // defined as splatted to more than half of the lanes. | ||||
7871 | unsigned NumElts = VT.getVectorNumElements(); | ||||
7872 | bool isOnlyLowElement = true; | ||||
7873 | bool usesOnlyOneValue = true; | ||||
7874 | bool hasDominantValue = false; | ||||
7875 | bool isConstant = true; | ||||
7876 | |||||
7877 | // Map of the number of times a particular SDValue appears in the | ||||
7878 | // element list. | ||||
7879 | DenseMap<SDValue, unsigned> ValueCounts; | ||||
7880 | SDValue Value; | ||||
7881 | for (unsigned i = 0; i < NumElts; ++i) { | ||||
7882 | SDValue V = Op.getOperand(i); | ||||
7883 | if (V.isUndef()) | ||||
7884 | continue; | ||||
7885 | if (i > 0) | ||||
7886 | isOnlyLowElement = false; | ||||
7887 | if (!isa<ConstantFPSDNode>(V) && !isa<ConstantSDNode>(V)) | ||||
7888 | isConstant = false; | ||||
7889 | |||||
7890 | ValueCounts.insert(std::make_pair(V, 0)); | ||||
7891 | unsigned &Count = ValueCounts[V]; | ||||
7892 | |||||
7893 | // Is this value dominant? (takes up more than half of the lanes) | ||||
7894 | if (++Count > (NumElts / 2)) { | ||||
7895 | hasDominantValue = true; | ||||
7896 | Value = V; | ||||
7897 | } | ||||
7898 | } | ||||
7899 | if (ValueCounts.size() != 1) | ||||
7900 | usesOnlyOneValue = false; | ||||
7901 | if (!Value.getNode() && !ValueCounts.empty()) | ||||
7902 | Value = ValueCounts.begin()->first; | ||||
7903 | |||||
7904 | if (ValueCounts.empty()) | ||||
7905 | return DAG.getUNDEF(VT); | ||||
7906 | |||||
7907 | // Loads are better lowered with insert_vector_elt/ARMISD::BUILD_VECTOR. | ||||
7908 | // Keep going if we are hitting this case. | ||||
7909 | if (isOnlyLowElement && !ISD::isNormalLoad(Value.getNode())) | ||||
7910 | return DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Value); | ||||
7911 | |||||
7912 | unsigned EltSize = VT.getScalarSizeInBits(); | ||||
7913 | |||||
7914 | // Use VDUP for non-constant splats. For f32 constant splats, reduce to | ||||
7915 | // i32 and try again. | ||||
7916 | if (hasDominantValue && EltSize <= 32) { | ||||
7917 | if (!isConstant) { | ||||
7918 | SDValue N; | ||||
7919 | |||||
7920 | // If we are VDUPing a value that comes directly from a vector, that will | ||||
7921 | // cause an unnecessary move to and from a GPR, where instead we could | ||||
7922 | // just use VDUPLANE. We can only do this if the lane being extracted | ||||
7923 | // is at a constant index, as the VDUP from lane instructions only have | ||||
7924 | // constant-index forms. | ||||
7925 | ConstantSDNode *constIndex; | ||||
7926 | if (Value->getOpcode() == ISD::EXTRACT_VECTOR_ELT && | ||||
7927 | (constIndex = dyn_cast<ConstantSDNode>(Value->getOperand(1)))) { | ||||
7928 | // We need to create a new undef vector to use for the VDUPLANE if the | ||||
7929 | // size of the vector from which we get the value is different than the | ||||
7930 | // size of the vector that we need to create. We will insert the element | ||||
7931 | // such that the register coalescer will remove unnecessary copies. | ||||
7932 | if (VT != Value->getOperand(0).getValueType()) { | ||||
7933 | unsigned index = constIndex->getAPIntValue().getLimitedValue() % | ||||
7934 | VT.getVectorNumElements(); | ||||
7935 | N = DAG.getNode(ARMISD::VDUPLANE, dl, VT, | ||||
7936 | DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VT, DAG.getUNDEF(VT), | ||||
7937 | Value, DAG.getConstant(index, dl, MVT::i32)), | ||||
7938 | DAG.getConstant(index, dl, MVT::i32)); | ||||
7939 | } else | ||||
7940 | N = DAG.getNode(ARMISD::VDUPLANE, dl, VT, | ||||
7941 | Value->getOperand(0), Value->getOperand(1)); | ||||
7942 | } else | ||||
7943 | N = DAG.getNode(ARMISD::VDUP, dl, VT, Value); | ||||
7944 | |||||
7945 | if (!usesOnlyOneValue) { | ||||
7946 | // The dominant value was splatted as 'N', but we now have to insert | ||||
7947 | // all differing elements. | ||||
7948 | for (unsigned I = 0; I < NumElts; ++I) { | ||||
7949 | if (Op.getOperand(I) == Value) | ||||
7950 | continue; | ||||
7951 | SmallVector<SDValue, 3> Ops; | ||||
7952 | Ops.push_back(N); | ||||
7953 | Ops.push_back(Op.getOperand(I)); | ||||
7954 | Ops.push_back(DAG.getConstant(I, dl, MVT::i32)); | ||||
7955 | N = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VT, Ops); | ||||
7956 | } | ||||
7957 | } | ||||
7958 | return N; | ||||
7959 | } | ||||
7960 | if (VT.getVectorElementType().isFloatingPoint()) { | ||||
7961 | SmallVector<SDValue, 8> Ops; | ||||
7962 | MVT FVT = VT.getVectorElementType().getSimpleVT(); | ||||
7963 | assert(FVT == MVT::f32 || FVT == MVT::f16)(static_cast <bool> (FVT == MVT::f32 || FVT == MVT::f16 ) ? void (0) : __assert_fail ("FVT == MVT::f32 || FVT == MVT::f16" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 7963, __extension__ __PRETTY_FUNCTION__)); | ||||
7964 | MVT IVT = (FVT == MVT::f32) ? MVT::i32 : MVT::i16; | ||||
7965 | for (unsigned i = 0; i < NumElts; ++i) | ||||
7966 | Ops.push_back(DAG.getNode(ISD::BITCAST, dl, IVT, | ||||
7967 | Op.getOperand(i))); | ||||
7968 | EVT VecVT = EVT::getVectorVT(*DAG.getContext(), IVT, NumElts); | ||||
7969 | SDValue Val = DAG.getBuildVector(VecVT, dl, Ops); | ||||
7970 | Val = LowerBUILD_VECTOR(Val, DAG, ST); | ||||
7971 | if (Val.getNode()) | ||||
7972 | return DAG.getNode(ISD::BITCAST, dl, VT, Val); | ||||
7973 | } | ||||
7974 | if (usesOnlyOneValue) { | ||||
7975 | SDValue Val = IsSingleInstrConstant(Value, DAG, ST, dl); | ||||
7976 | if (isConstant && Val.getNode()) | ||||
7977 | return DAG.getNode(ARMISD::VDUP, dl, VT, Val); | ||||
7978 | } | ||||
7979 | } | ||||
7980 | |||||
7981 | // If all elements are constants and the case above didn't get hit, fall back | ||||
7982 | // to the default expansion, which will generate a load from the constant | ||||
7983 | // pool. | ||||
7984 | if (isConstant) | ||||
7985 | return SDValue(); | ||||
7986 | |||||
7987 | // Reconstruct the BUILDVECTOR to one of the legal shuffles (such as vext and | ||||
7988 | // vmovn). Empirical tests suggest this is rarely worth it for vectors of | ||||
7989 | // length <= 2. | ||||
7990 | if (NumElts >= 4) | ||||
7991 | if (SDValue shuffle = ReconstructShuffle(Op, DAG)) | ||||
7992 | return shuffle; | ||||
7993 | |||||
7994 | // Attempt to turn a buildvector of scalar fptrunc's or fpext's back into | ||||
7995 | // VCVT's | ||||
7996 | if (SDValue VCVT = LowerBuildVectorOfFPTrunc(Op, DAG, Subtarget)) | ||||
7997 | return VCVT; | ||||
7998 | if (SDValue VCVT = LowerBuildVectorOfFPExt(Op, DAG, Subtarget)) | ||||
7999 | return VCVT; | ||||
8000 | |||||
8001 | if (ST->hasNEON() && VT.is128BitVector() && VT != MVT::v2f64 && VT != MVT::v4f32) { | ||||
8002 | // If we haven't found an efficient lowering, try splitting a 128-bit vector | ||||
8003 | // into two 64-bit vectors; we might discover a better way to lower it. | ||||
8004 | SmallVector<SDValue, 64> Ops(Op->op_begin(), Op->op_begin() + NumElts); | ||||
8005 | EVT ExtVT = VT.getVectorElementType(); | ||||
8006 | EVT HVT = EVT::getVectorVT(*DAG.getContext(), ExtVT, NumElts / 2); | ||||
8007 | SDValue Lower = | ||||
8008 | DAG.getBuildVector(HVT, dl, makeArrayRef(&Ops[0], NumElts / 2)); | ||||
8009 | if (Lower.getOpcode() == ISD::BUILD_VECTOR) | ||||
8010 | Lower = LowerBUILD_VECTOR(Lower, DAG, ST); | ||||
8011 | SDValue Upper = DAG.getBuildVector( | ||||
8012 | HVT, dl, makeArrayRef(&Ops[NumElts / 2], NumElts / 2)); | ||||
8013 | if (Upper.getOpcode() == ISD::BUILD_VECTOR) | ||||
8014 | Upper = LowerBUILD_VECTOR(Upper, DAG, ST); | ||||
8015 | if (Lower && Upper) | ||||
8016 | return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, Lower, Upper); | ||||
8017 | } | ||||
8018 | |||||
8019 | // Vectors with 32- or 64-bit elements can be built by directly assigning | ||||
8020 | // the subregisters. Lower it to an ARMISD::BUILD_VECTOR so the operands | ||||
8021 | // will be legalized. | ||||
8022 | if (EltSize >= 32) { | ||||
8023 | // Do the expansion with floating-point types, since that is what the VFP | ||||
8024 | // registers are defined to use, and since i64 is not legal. | ||||
8025 | EVT EltVT = EVT::getFloatingPointVT(EltSize); | ||||
8026 | EVT VecVT = EVT::getVectorVT(*DAG.getContext(), EltVT, NumElts); | ||||
8027 | SmallVector<SDValue, 8> Ops; | ||||
8028 | for (unsigned i = 0; i < NumElts; ++i) | ||||
8029 | Ops.push_back(DAG.getNode(ISD::BITCAST, dl, EltVT, Op.getOperand(i))); | ||||
8030 | SDValue Val = DAG.getNode(ARMISD::BUILD_VECTOR, dl, VecVT, Ops); | ||||
8031 | return DAG.getNode(ISD::BITCAST, dl, VT, Val); | ||||
8032 | } | ||||
8033 | |||||
8034 | // If all else fails, just use a sequence of INSERT_VECTOR_ELT when we | ||||
8035 | // know the default expansion would otherwise fall back on something even | ||||
8036 | // worse. For a vector with one or two non-undef values, that's | ||||
8037 | // scalar_to_vector for the elements followed by a shuffle (provided the | ||||
8038 | // shuffle is valid for the target) and materialization element by element | ||||
8039 | // on the stack followed by a load for everything else. | ||||
8040 | if (!isConstant && !usesOnlyOneValue) { | ||||
8041 | SDValue Vec = DAG.getUNDEF(VT); | ||||
8042 | for (unsigned i = 0 ; i < NumElts; ++i) { | ||||
8043 | SDValue V = Op.getOperand(i); | ||||
8044 | if (V.isUndef()) | ||||
8045 | continue; | ||||
8046 | SDValue LaneIdx = DAG.getConstant(i, dl, MVT::i32); | ||||
8047 | Vec = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VT, Vec, V, LaneIdx); | ||||
8048 | } | ||||
8049 | return Vec; | ||||
8050 | } | ||||
8051 | |||||
8052 | return SDValue(); | ||||
8053 | } | ||||
8054 | |||||
8055 | // Gather data to see if the operation can be modelled as a | ||||
8056 | // shuffle in combination with VEXTs. | ||||
8057 | SDValue ARMTargetLowering::ReconstructShuffle(SDValue Op, | ||||
8058 | SelectionDAG &DAG) const { | ||||
8059 | assert(Op.getOpcode() == ISD::BUILD_VECTOR && "Unknown opcode!")(static_cast <bool> (Op.getOpcode() == ISD::BUILD_VECTOR && "Unknown opcode!") ? void (0) : __assert_fail ("Op.getOpcode() == ISD::BUILD_VECTOR && \"Unknown opcode!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 8059, __extension__ __PRETTY_FUNCTION__)); | ||||
8060 | SDLoc dl(Op); | ||||
8061 | EVT VT = Op.getValueType(); | ||||
8062 | unsigned NumElts = VT.getVectorNumElements(); | ||||
8063 | |||||
8064 | struct ShuffleSourceInfo { | ||||
8065 | SDValue Vec; | ||||
8066 | unsigned MinElt = std::numeric_limits<unsigned>::max(); | ||||
8067 | unsigned MaxElt = 0; | ||||
8068 | |||||
8069 | // We may insert some combination of BITCASTs and VEXT nodes to force Vec to | ||||
8070 | // be compatible with the shuffle we intend to construct. As a result | ||||
8071 | // ShuffleVec will be some sliding window into the original Vec. | ||||
8072 | SDValue ShuffleVec; | ||||
8073 | |||||
8074 | // Code should guarantee that element i in Vec starts at element "WindowBase | ||||
8075 | // + i * WindowScale in ShuffleVec". | ||||
8076 | int WindowBase = 0; | ||||
8077 | int WindowScale = 1; | ||||
8078 | |||||
8079 | ShuffleSourceInfo(SDValue Vec) : Vec(Vec), ShuffleVec(Vec) {} | ||||
8080 | |||||
8081 | bool operator ==(SDValue OtherVec) { return Vec == OtherVec; } | ||||
8082 | }; | ||||
8083 | |||||
8084 | // First gather all vectors used as an immediate source for this BUILD_VECTOR | ||||
8085 | // node. | ||||
8086 | SmallVector<ShuffleSourceInfo, 2> Sources; | ||||
8087 | for (unsigned i = 0; i < NumElts; ++i) { | ||||
8088 | SDValue V = Op.getOperand(i); | ||||
8089 | if (V.isUndef()) | ||||
8090 | continue; | ||||
8091 | else if (V.getOpcode() != ISD::EXTRACT_VECTOR_ELT) { | ||||
8092 | // A shuffle can only come from building a vector from various | ||||
8093 | // elements of other vectors. | ||||
8094 | return SDValue(); | ||||
8095 | } else if (!isa<ConstantSDNode>(V.getOperand(1))) { | ||||
8096 | // Furthermore, shuffles require a constant mask, whereas extractelts | ||||
8097 | // accept variable indices. | ||||
8098 | return SDValue(); | ||||
8099 | } | ||||
8100 | |||||
8101 | // Add this element source to the list if it's not already there. | ||||
8102 | SDValue SourceVec = V.getOperand(0); | ||||
8103 | auto Source = llvm::find(Sources, SourceVec); | ||||
8104 | if (Source == Sources.end()) | ||||
8105 | Source = Sources.insert(Sources.end(), ShuffleSourceInfo(SourceVec)); | ||||
8106 | |||||
8107 | // Update the minimum and maximum lane number seen. | ||||
8108 | unsigned EltNo = cast<ConstantSDNode>(V.getOperand(1))->getZExtValue(); | ||||
8109 | Source->MinElt = std::min(Source->MinElt, EltNo); | ||||
8110 | Source->MaxElt = std::max(Source->MaxElt, EltNo); | ||||
8111 | } | ||||
8112 | |||||
8113 | // Currently only do something sane when at most two source vectors | ||||
8114 | // are involved. | ||||
8115 | if (Sources.size() > 2) | ||||
8116 | return SDValue(); | ||||
8117 | |||||
8118 | // Find out the smallest element size among result and two sources, and use | ||||
8119 | // it as element size to build the shuffle_vector. | ||||
8120 | EVT SmallestEltTy = VT.getVectorElementType(); | ||||
8121 | for (auto &Source : Sources) { | ||||
8122 | EVT SrcEltTy = Source.Vec.getValueType().getVectorElementType(); | ||||
8123 | if (SrcEltTy.bitsLT(SmallestEltTy)) | ||||
8124 | SmallestEltTy = SrcEltTy; | ||||
8125 | } | ||||
8126 | unsigned ResMultiplier = | ||||
8127 | VT.getScalarSizeInBits() / SmallestEltTy.getSizeInBits(); | ||||
8128 | NumElts = VT.getSizeInBits() / SmallestEltTy.getSizeInBits(); | ||||
8129 | EVT ShuffleVT = EVT::getVectorVT(*DAG.getContext(), SmallestEltTy, NumElts); | ||||
8130 | |||||
8131 | // If the source vector is too wide or too narrow, we may nevertheless be able | ||||
8132 | // to construct a compatible shuffle either by concatenating it with UNDEF or | ||||
8133 | // extracting a suitable range of elements. | ||||
8134 | for (auto &Src : Sources) { | ||||
8135 | EVT SrcVT = Src.ShuffleVec.getValueType(); | ||||
8136 | |||||
8137 | uint64_t SrcVTSize = SrcVT.getFixedSizeInBits(); | ||||
8138 | uint64_t VTSize = VT.getFixedSizeInBits(); | ||||
8139 | if (SrcVTSize == VTSize) | ||||
8140 | continue; | ||||
8141 | |||||
8142 | // This stage of the search produces a source with the same element type as | ||||
8143 | // the original, but with a total width matching the BUILD_VECTOR output. | ||||
8144 | EVT EltVT = SrcVT.getVectorElementType(); | ||||
8145 | unsigned NumSrcElts = VTSize / EltVT.getFixedSizeInBits(); | ||||
8146 | EVT DestVT = EVT::getVectorVT(*DAG.getContext(), EltVT, NumSrcElts); | ||||
8147 | |||||
8148 | if (SrcVTSize < VTSize) { | ||||
8149 | if (2 * SrcVTSize != VTSize) | ||||
8150 | return SDValue(); | ||||
8151 | // We can pad out the smaller vector for free, so if it's part of a | ||||
8152 | // shuffle... | ||||
8153 | Src.ShuffleVec = | ||||
8154 | DAG.getNode(ISD::CONCAT_VECTORS, dl, DestVT, Src.ShuffleVec, | ||||
8155 | DAG.getUNDEF(Src.ShuffleVec.getValueType())); | ||||
8156 | continue; | ||||
8157 | } | ||||
8158 | |||||
8159 | if (SrcVTSize != 2 * VTSize) | ||||
8160 | return SDValue(); | ||||
8161 | |||||
8162 | if (Src.MaxElt - Src.MinElt >= NumSrcElts) { | ||||
8163 | // Span too large for a VEXT to cope | ||||
8164 | return SDValue(); | ||||
8165 | } | ||||
8166 | |||||
8167 | if (Src.MinElt >= NumSrcElts) { | ||||
8168 | // The extraction can just take the second half | ||||
8169 | Src.ShuffleVec = | ||||
8170 | DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, DestVT, Src.ShuffleVec, | ||||
8171 | DAG.getConstant(NumSrcElts, dl, MVT::i32)); | ||||
8172 | Src.WindowBase = -NumSrcElts; | ||||
8173 | } else if (Src.MaxElt < NumSrcElts) { | ||||
8174 | // The extraction can just take the first half | ||||
8175 | Src.ShuffleVec = | ||||
8176 | DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, DestVT, Src.ShuffleVec, | ||||
8177 | DAG.getConstant(0, dl, MVT::i32)); | ||||
8178 | } else { | ||||
8179 | // An actual VEXT is needed | ||||
8180 | SDValue VEXTSrc1 = | ||||
8181 | DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, DestVT, Src.ShuffleVec, | ||||
8182 | DAG.getConstant(0, dl, MVT::i32)); | ||||
8183 | SDValue VEXTSrc2 = | ||||
8184 | DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, DestVT, Src.ShuffleVec, | ||||
8185 | DAG.getConstant(NumSrcElts, dl, MVT::i32)); | ||||
8186 | |||||
8187 | Src.ShuffleVec = DAG.getNode(ARMISD::VEXT, dl, DestVT, VEXTSrc1, | ||||
8188 | VEXTSrc2, | ||||
8189 | DAG.getConstant(Src.MinElt, dl, MVT::i32)); | ||||
8190 | Src.WindowBase = -Src.MinElt; | ||||
8191 | } | ||||
8192 | } | ||||
8193 | |||||
8194 | // Another possible incompatibility occurs from the vector element types. We | ||||
8195 | // can fix this by bitcasting the source vectors to the same type we intend | ||||
8196 | // for the shuffle. | ||||
8197 | for (auto &Src : Sources) { | ||||
8198 | EVT SrcEltTy = Src.ShuffleVec.getValueType().getVectorElementType(); | ||||
8199 | if (SrcEltTy == SmallestEltTy) | ||||
8200 | continue; | ||||
8201 | assert(ShuffleVT.getVectorElementType() == SmallestEltTy)(static_cast <bool> (ShuffleVT.getVectorElementType() == SmallestEltTy) ? void (0) : __assert_fail ("ShuffleVT.getVectorElementType() == SmallestEltTy" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 8201, __extension__ __PRETTY_FUNCTION__)); | ||||
8202 | Src.ShuffleVec = DAG.getNode(ARMISD::VECTOR_REG_CAST, dl, ShuffleVT, Src.ShuffleVec); | ||||
8203 | Src.WindowScale = SrcEltTy.getSizeInBits() / SmallestEltTy.getSizeInBits(); | ||||
8204 | Src.WindowBase *= Src.WindowScale; | ||||
8205 | } | ||||
8206 | |||||
8207 | // Final check before we try to actually produce a shuffle. | ||||
8208 | LLVM_DEBUG(for (auto Srcdo { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("arm-isel")) { for (auto Src : Sources) (static_cast <bool > (Src.ShuffleVec.getValueType() == ShuffleVT) ? void (0) : __assert_fail ("Src.ShuffleVec.getValueType() == ShuffleVT", "llvm/lib/Target/ARM/ARMISelLowering.cpp", 8210, __extension__ __PRETTY_FUNCTION__));; } } while (false) | ||||
8209 | : Sources)do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("arm-isel")) { for (auto Src : Sources) (static_cast <bool > (Src.ShuffleVec.getValueType() == ShuffleVT) ? void (0) : __assert_fail ("Src.ShuffleVec.getValueType() == ShuffleVT", "llvm/lib/Target/ARM/ARMISelLowering.cpp", 8210, __extension__ __PRETTY_FUNCTION__));; } } while (false) | ||||
8210 | assert(Src.ShuffleVec.getValueType() == ShuffleVT);)do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("arm-isel")) { for (auto Src : Sources) (static_cast <bool > (Src.ShuffleVec.getValueType() == ShuffleVT) ? void (0) : __assert_fail ("Src.ShuffleVec.getValueType() == ShuffleVT", "llvm/lib/Target/ARM/ARMISelLowering.cpp", 8210, __extension__ __PRETTY_FUNCTION__));; } } while (false); | ||||
8211 | |||||
8212 | // The stars all align, our next step is to produce the mask for the shuffle. | ||||
8213 | SmallVector<int, 8> Mask(ShuffleVT.getVectorNumElements(), -1); | ||||
8214 | int BitsPerShuffleLane = ShuffleVT.getScalarSizeInBits(); | ||||
8215 | for (unsigned i = 0; i < VT.getVectorNumElements(); ++i) { | ||||
8216 | SDValue Entry = Op.getOperand(i); | ||||
8217 | if (Entry.isUndef()) | ||||
8218 | continue; | ||||
8219 | |||||
8220 | auto Src = llvm::find(Sources, Entry.getOperand(0)); | ||||
8221 | int EltNo = cast<ConstantSDNode>(Entry.getOperand(1))->getSExtValue(); | ||||
8222 | |||||
8223 | // EXTRACT_VECTOR_ELT performs an implicit any_ext; BUILD_VECTOR an implicit | ||||
8224 | // trunc. So only std::min(SrcBits, DestBits) actually get defined in this | ||||
8225 | // segment. | ||||
8226 | EVT OrigEltTy = Entry.getOperand(0).getValueType().getVectorElementType(); | ||||
8227 | int BitsDefined = std::min(OrigEltTy.getScalarSizeInBits(), | ||||
8228 | VT.getScalarSizeInBits()); | ||||
8229 | int LanesDefined = BitsDefined / BitsPerShuffleLane; | ||||
8230 | |||||
8231 | // This source is expected to fill ResMultiplier lanes of the final shuffle, | ||||
8232 | // starting at the appropriate offset. | ||||
8233 | int *LaneMask = &Mask[i * ResMultiplier]; | ||||
8234 | |||||
8235 | int ExtractBase = EltNo * Src->WindowScale + Src->WindowBase; | ||||
8236 | ExtractBase += NumElts * (Src - Sources.begin()); | ||||
8237 | for (int j = 0; j < LanesDefined; ++j) | ||||
8238 | LaneMask[j] = ExtractBase + j; | ||||
8239 | } | ||||
8240 | |||||
8241 | |||||
8242 | // We can't handle more than two sources. This should have already | ||||
8243 | // been checked before this point. | ||||
8244 | assert(Sources.size() <= 2 && "Too many sources!")(static_cast <bool> (Sources.size() <= 2 && "Too many sources!" ) ? void (0) : __assert_fail ("Sources.size() <= 2 && \"Too many sources!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 8244, __extension__ __PRETTY_FUNCTION__)); | ||||
8245 | |||||
8246 | SDValue ShuffleOps[] = { DAG.getUNDEF(ShuffleVT), DAG.getUNDEF(ShuffleVT) }; | ||||
8247 | for (unsigned i = 0; i < Sources.size(); ++i) | ||||
8248 | ShuffleOps[i] = Sources[i].ShuffleVec; | ||||
8249 | |||||
8250 | SDValue Shuffle = buildLegalVectorShuffle(ShuffleVT, dl, ShuffleOps[0], | ||||
8251 | ShuffleOps[1], Mask, DAG); | ||||
8252 | if (!Shuffle) | ||||
8253 | return SDValue(); | ||||
8254 | return DAG.getNode(ARMISD::VECTOR_REG_CAST, dl, VT, Shuffle); | ||||
8255 | } | ||||
8256 | |||||
8257 | enum ShuffleOpCodes { | ||||
8258 | OP_COPY = 0, // Copy, used for things like <u,u,u,3> to say it is <0,1,2,3> | ||||
8259 | OP_VREV, | ||||
8260 | OP_VDUP0, | ||||
8261 | OP_VDUP1, | ||||
8262 | OP_VDUP2, | ||||
8263 | OP_VDUP3, | ||||
8264 | OP_VEXT1, | ||||
8265 | OP_VEXT2, | ||||
8266 | OP_VEXT3, | ||||
8267 | OP_VUZPL, // VUZP, left result | ||||
8268 | OP_VUZPR, // VUZP, right result | ||||
8269 | OP_VZIPL, // VZIP, left result | ||||
8270 | OP_VZIPR, // VZIP, right result | ||||
8271 | OP_VTRNL, // VTRN, left result | ||||
8272 | OP_VTRNR // VTRN, right result | ||||
8273 | }; | ||||
8274 | |||||
8275 | static bool isLegalMVEShuffleOp(unsigned PFEntry) { | ||||
8276 | unsigned OpNum = (PFEntry >> 26) & 0x0F; | ||||
8277 | switch (OpNum) { | ||||
8278 | case OP_COPY: | ||||
8279 | case OP_VREV: | ||||
8280 | case OP_VDUP0: | ||||
8281 | case OP_VDUP1: | ||||
8282 | case OP_VDUP2: | ||||
8283 | case OP_VDUP3: | ||||
8284 | return true; | ||||
8285 | } | ||||
8286 | return false; | ||||
8287 | } | ||||
8288 | |||||
8289 | /// isShuffleMaskLegal - Targets can use this to indicate that they only | ||||
8290 | /// support *some* VECTOR_SHUFFLE operations, those with specific masks. | ||||
8291 | /// By default, if a target supports the VECTOR_SHUFFLE node, all mask values | ||||
8292 | /// are assumed to be legal. | ||||
8293 | bool ARMTargetLowering::isShuffleMaskLegal(ArrayRef<int> M, EVT VT) const { | ||||
8294 | if (VT.getVectorNumElements() == 4 && | ||||
8295 | (VT.is128BitVector() || VT.is64BitVector())) { | ||||
8296 | unsigned PFIndexes[4]; | ||||
8297 | for (unsigned i = 0; i != 4; ++i) { | ||||
8298 | if (M[i] < 0) | ||||
8299 | PFIndexes[i] = 8; | ||||
8300 | else | ||||
8301 | PFIndexes[i] = M[i]; | ||||
8302 | } | ||||
8303 | |||||
8304 | // Compute the index in the perfect shuffle table. | ||||
8305 | unsigned PFTableIndex = | ||||
8306 | PFIndexes[0]*9*9*9+PFIndexes[1]*9*9+PFIndexes[2]*9+PFIndexes[3]; | ||||
8307 | unsigned PFEntry = PerfectShuffleTable[PFTableIndex]; | ||||
8308 | unsigned Cost = (PFEntry >> 30); | ||||
8309 | |||||
8310 | if (Cost <= 4 && (Subtarget->hasNEON() || isLegalMVEShuffleOp(PFEntry))) | ||||
8311 | return true; | ||||
8312 | } | ||||
8313 | |||||
8314 | bool ReverseVEXT, isV_UNDEF; | ||||
8315 | unsigned Imm, WhichResult; | ||||
8316 | |||||
8317 | unsigned EltSize = VT.getScalarSizeInBits(); | ||||
8318 | if (EltSize >= 32 || | ||||
8319 | ShuffleVectorSDNode::isSplatMask(&M[0], VT) || | ||||
8320 | ShuffleVectorInst::isIdentityMask(M) || | ||||
8321 | isVREVMask(M, VT, 64) || | ||||
8322 | isVREVMask(M, VT, 32) || | ||||
8323 | isVREVMask(M, VT, 16)) | ||||
8324 | return true; | ||||
8325 | else if (Subtarget->hasNEON() && | ||||
8326 | (isVEXTMask(M, VT, ReverseVEXT, Imm) || | ||||
8327 | isVTBLMask(M, VT) || | ||||
8328 | isNEONTwoResultShuffleMask(M, VT, WhichResult, isV_UNDEF))) | ||||
8329 | return true; | ||||
8330 | else if ((VT == MVT::v8i16 || VT == MVT::v8f16 || VT == MVT::v16i8) && | ||||
8331 | isReverseMask(M, VT)) | ||||
8332 | return true; | ||||
8333 | else if (Subtarget->hasMVEIntegerOps() && | ||||
8334 | (isVMOVNMask(M, VT, true, false) || | ||||
8335 | isVMOVNMask(M, VT, false, false) || isVMOVNMask(M, VT, true, true))) | ||||
8336 | return true; | ||||
8337 | else | ||||
8338 | return false; | ||||
8339 | } | ||||
8340 | |||||
8341 | /// GeneratePerfectShuffle - Given an entry in the perfect-shuffle table, emit | ||||
8342 | /// the specified operations to build the shuffle. | ||||
8343 | static SDValue GeneratePerfectShuffle(unsigned PFEntry, SDValue LHS, | ||||
8344 | SDValue RHS, SelectionDAG &DAG, | ||||
8345 | const SDLoc &dl) { | ||||
8346 | unsigned OpNum = (PFEntry >> 26) & 0x0F; | ||||
8347 | unsigned LHSID = (PFEntry >> 13) & ((1 << 13)-1); | ||||
8348 | unsigned RHSID = (PFEntry >> 0) & ((1 << 13)-1); | ||||
8349 | |||||
8350 | if (OpNum == OP_COPY) { | ||||
8351 | if (LHSID == (1*9+2)*9+3) return LHS; | ||||
8352 | assert(LHSID == ((4*9+5)*9+6)*9+7 && "Illegal OP_COPY!")(static_cast <bool> (LHSID == ((4*9+5)*9+6)*9+7 && "Illegal OP_COPY!") ? void (0) : __assert_fail ("LHSID == ((4*9+5)*9+6)*9+7 && \"Illegal OP_COPY!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 8352, __extension__ __PRETTY_FUNCTION__)); | ||||
8353 | return RHS; | ||||
8354 | } | ||||
8355 | |||||
8356 | SDValue OpLHS, OpRHS; | ||||
8357 | OpLHS = GeneratePerfectShuffle(PerfectShuffleTable[LHSID], LHS, RHS, DAG, dl); | ||||
8358 | OpRHS = GeneratePerfectShuffle(PerfectShuffleTable[RHSID], LHS, RHS, DAG, dl); | ||||
8359 | EVT VT = OpLHS.getValueType(); | ||||
8360 | |||||
8361 | switch (OpNum) { | ||||
8362 | default: llvm_unreachable("Unknown shuffle opcode!")::llvm::llvm_unreachable_internal("Unknown shuffle opcode!", "llvm/lib/Target/ARM/ARMISelLowering.cpp" , 8362); | ||||
8363 | case OP_VREV: | ||||
8364 | // VREV divides the vector in half and swaps within the half. | ||||
8365 | if (VT.getVectorElementType() == MVT::i32 || | ||||
8366 | VT.getVectorElementType() == MVT::f32) | ||||
8367 | return DAG.getNode(ARMISD::VREV64, dl, VT, OpLHS); | ||||
8368 | // vrev <4 x i16> -> VREV32 | ||||
8369 | if (VT.getVectorElementType() == MVT::i16 || | ||||
8370 | VT.getVectorElementType() == MVT::f16) | ||||
8371 | return DAG.getNode(ARMISD::VREV32, dl, VT, OpLHS); | ||||
8372 | // vrev <4 x i8> -> VREV16 | ||||
8373 | assert(VT.getVectorElementType() == MVT::i8)(static_cast <bool> (VT.getVectorElementType() == MVT:: i8) ? void (0) : __assert_fail ("VT.getVectorElementType() == MVT::i8" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 8373, __extension__ __PRETTY_FUNCTION__)); | ||||
8374 | return DAG.getNode(ARMISD::VREV16, dl, VT, OpLHS); | ||||
8375 | case OP_VDUP0: | ||||
8376 | case OP_VDUP1: | ||||
8377 | case OP_VDUP2: | ||||
8378 | case OP_VDUP3: | ||||
8379 | return DAG.getNode(ARMISD::VDUPLANE, dl, VT, | ||||
8380 | OpLHS, DAG.getConstant(OpNum-OP_VDUP0, dl, MVT::i32)); | ||||
8381 | case OP_VEXT1: | ||||
8382 | case OP_VEXT2: | ||||
8383 | case OP_VEXT3: | ||||
8384 | return DAG.getNode(ARMISD::VEXT, dl, VT, | ||||
8385 | OpLHS, OpRHS, | ||||
8386 | DAG.getConstant(OpNum - OP_VEXT1 + 1, dl, MVT::i32)); | ||||
8387 | case OP_VUZPL: | ||||
8388 | case OP_VUZPR: | ||||
8389 | return DAG.getNode(ARMISD::VUZP, dl, DAG.getVTList(VT, VT), | ||||
8390 | OpLHS, OpRHS).getValue(OpNum-OP_VUZPL); | ||||
8391 | case OP_VZIPL: | ||||
8392 | case OP_VZIPR: | ||||
8393 | return DAG.getNode(ARMISD::VZIP, dl, DAG.getVTList(VT, VT), | ||||
8394 | OpLHS, OpRHS).getValue(OpNum-OP_VZIPL); | ||||
8395 | case OP_VTRNL: | ||||
8396 | case OP_VTRNR: | ||||
8397 | return DAG.getNode(ARMISD::VTRN, dl, DAG.getVTList(VT, VT), | ||||
8398 | OpLHS, OpRHS).getValue(OpNum-OP_VTRNL); | ||||
8399 | } | ||||
8400 | } | ||||
8401 | |||||
8402 | static SDValue LowerVECTOR_SHUFFLEv8i8(SDValue Op, | ||||
8403 | ArrayRef<int> ShuffleMask, | ||||
8404 | SelectionDAG &DAG) { | ||||
8405 | // Check to see if we can use the VTBL instruction. | ||||
8406 | SDValue V1 = Op.getOperand(0); | ||||
8407 | SDValue V2 = Op.getOperand(1); | ||||
8408 | SDLoc DL(Op); | ||||
8409 | |||||
8410 | SmallVector<SDValue, 8> VTBLMask; | ||||
8411 | for (int I : ShuffleMask) | ||||
8412 | VTBLMask.push_back(DAG.getConstant(I, DL, MVT::i32)); | ||||
8413 | |||||
8414 | if (V2.getNode()->isUndef()) | ||||
8415 | return DAG.getNode(ARMISD::VTBL1, DL, MVT::v8i8, V1, | ||||
8416 | DAG.getBuildVector(MVT::v8i8, DL, VTBLMask)); | ||||
8417 | |||||
8418 | return DAG.getNode(ARMISD::VTBL2, DL, MVT::v8i8, V1, V2, | ||||
8419 | DAG.getBuildVector(MVT::v8i8, DL, VTBLMask)); | ||||
8420 | } | ||||
8421 | |||||
8422 | static SDValue LowerReverse_VECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) { | ||||
8423 | SDLoc DL(Op); | ||||
8424 | EVT VT = Op.getValueType(); | ||||
8425 | |||||
8426 | assert((VT == MVT::v8i16 || VT == MVT::v8f16 || VT == MVT::v16i8) &&(static_cast <bool> ((VT == MVT::v8i16 || VT == MVT::v8f16 || VT == MVT::v16i8) && "Expect an v8i16/v16i8 type" ) ? void (0) : __assert_fail ("(VT == MVT::v8i16 || VT == MVT::v8f16 || VT == MVT::v16i8) && \"Expect an v8i16/v16i8 type\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 8427, __extension__ __PRETTY_FUNCTION__)) | ||||
8427 | "Expect an v8i16/v16i8 type")(static_cast <bool> ((VT == MVT::v8i16 || VT == MVT::v8f16 || VT == MVT::v16i8) && "Expect an v8i16/v16i8 type" ) ? void (0) : __assert_fail ("(VT == MVT::v8i16 || VT == MVT::v8f16 || VT == MVT::v16i8) && \"Expect an v8i16/v16i8 type\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 8427, __extension__ __PRETTY_FUNCTION__)); | ||||
8428 | SDValue OpLHS = DAG.getNode(ARMISD::VREV64, DL, VT, Op.getOperand(0)); | ||||
8429 | // For a v16i8 type: After the VREV, we have got <7, ..., 0, 15, ..., 8>. Now, | ||||
8430 | // extract the first 8 bytes into the top double word and the last 8 bytes | ||||
8431 | // into the bottom double word, through a new vector shuffle that will be | ||||
8432 | // turned into a VEXT on Neon, or a couple of VMOVDs on MVE. | ||||
8433 | std::vector<int> NewMask; | ||||
8434 | for (unsigned i = 0; i < VT.getVectorNumElements() / 2; i++) | ||||
8435 | NewMask.push_back(VT.getVectorNumElements() / 2 + i); | ||||
8436 | for (unsigned i = 0; i < VT.getVectorNumElements() / 2; i++) | ||||
8437 | NewMask.push_back(i); | ||||
8438 | return DAG.getVectorShuffle(VT, DL, OpLHS, OpLHS, NewMask); | ||||
8439 | } | ||||
8440 | |||||
8441 | static EVT getVectorTyFromPredicateVector(EVT VT) { | ||||
8442 | switch (VT.getSimpleVT().SimpleTy) { | ||||
8443 | case MVT::v2i1: | ||||
8444 | return MVT::v2f64; | ||||
8445 | case MVT::v4i1: | ||||
8446 | return MVT::v4i32; | ||||
8447 | case MVT::v8i1: | ||||
8448 | return MVT::v8i16; | ||||
8449 | case MVT::v16i1: | ||||
8450 | return MVT::v16i8; | ||||
8451 | default: | ||||
8452 | llvm_unreachable("Unexpected vector predicate type")::llvm::llvm_unreachable_internal("Unexpected vector predicate type" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 8452); | ||||
8453 | } | ||||
8454 | } | ||||
8455 | |||||
8456 | static SDValue PromoteMVEPredVector(SDLoc dl, SDValue Pred, EVT VT, | ||||
8457 | SelectionDAG &DAG) { | ||||
8458 | // Converting from boolean predicates to integers involves creating a vector | ||||
8459 | // of all ones or all zeroes and selecting the lanes based upon the real | ||||
8460 | // predicate. | ||||
8461 | SDValue AllOnes = | ||||
8462 | DAG.getTargetConstant(ARM_AM::createVMOVModImm(0xe, 0xff), dl, MVT::i32); | ||||
8463 | AllOnes = DAG.getNode(ARMISD::VMOVIMM, dl, MVT::v16i8, AllOnes); | ||||
8464 | |||||
8465 | SDValue AllZeroes = | ||||
8466 | DAG.getTargetConstant(ARM_AM::createVMOVModImm(0xe, 0x0), dl, MVT::i32); | ||||
8467 | AllZeroes = DAG.getNode(ARMISD::VMOVIMM, dl, MVT::v16i8, AllZeroes); | ||||
8468 | |||||
8469 | // Get full vector type from predicate type | ||||
8470 | EVT NewVT = getVectorTyFromPredicateVector(VT); | ||||
8471 | |||||
8472 | SDValue RecastV1; | ||||
8473 | // If the real predicate is an v8i1 or v4i1 (not v16i1) then we need to recast | ||||
8474 | // this to a v16i1. This cannot be done with an ordinary bitcast because the | ||||
8475 | // sizes are not the same. We have to use a MVE specific PREDICATE_CAST node, | ||||
8476 | // since we know in hardware the sizes are really the same. | ||||
8477 | if (VT != MVT::v16i1) | ||||
8478 | RecastV1 = DAG.getNode(ARMISD::PREDICATE_CAST, dl, MVT::v16i1, Pred); | ||||
8479 | else | ||||
8480 | RecastV1 = Pred; | ||||
8481 | |||||
8482 | // Select either all ones or zeroes depending upon the real predicate bits. | ||||
8483 | SDValue PredAsVector = | ||||
8484 | DAG.getNode(ISD::VSELECT, dl, MVT::v16i8, RecastV1, AllOnes, AllZeroes); | ||||
8485 | |||||
8486 | // Recast our new predicate-as-integer v16i8 vector into something | ||||
8487 | // appropriate for the shuffle, i.e. v4i32 for a real v4i1 predicate. | ||||
8488 | return DAG.getNode(ISD::BITCAST, dl, NewVT, PredAsVector); | ||||
8489 | } | ||||
8490 | |||||
8491 | static SDValue LowerVECTOR_SHUFFLE_i1(SDValue Op, SelectionDAG &DAG, | ||||
8492 | const ARMSubtarget *ST) { | ||||
8493 | EVT VT = Op.getValueType(); | ||||
8494 | ShuffleVectorSDNode *SVN = cast<ShuffleVectorSDNode>(Op.getNode()); | ||||
8495 | ArrayRef<int> ShuffleMask = SVN->getMask(); | ||||
8496 | |||||
8497 | assert(ST->hasMVEIntegerOps() &&(static_cast <bool> (ST->hasMVEIntegerOps() && "No support for vector shuffle of boolean predicates") ? void (0) : __assert_fail ("ST->hasMVEIntegerOps() && \"No support for vector shuffle of boolean predicates\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 8498, __extension__ __PRETTY_FUNCTION__)) | ||||
8498 | "No support for vector shuffle of boolean predicates")(static_cast <bool> (ST->hasMVEIntegerOps() && "No support for vector shuffle of boolean predicates") ? void (0) : __assert_fail ("ST->hasMVEIntegerOps() && \"No support for vector shuffle of boolean predicates\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 8498, __extension__ __PRETTY_FUNCTION__)); | ||||
8499 | |||||
8500 | SDValue V1 = Op.getOperand(0); | ||||
8501 | SDLoc dl(Op); | ||||
8502 | if (isReverseMask(ShuffleMask, VT)) { | ||||
8503 | SDValue cast = DAG.getNode(ARMISD::PREDICATE_CAST, dl, MVT::i32, V1); | ||||
8504 | SDValue rbit = DAG.getNode(ISD::BITREVERSE, dl, MVT::i32, cast); | ||||
8505 | SDValue srl = DAG.getNode(ISD::SRL, dl, MVT::i32, rbit, | ||||
8506 | DAG.getConstant(16, dl, MVT::i32)); | ||||
8507 | return DAG.getNode(ARMISD::PREDICATE_CAST, dl, VT, srl); | ||||
8508 | } | ||||
8509 | |||||
8510 | // Until we can come up with optimised cases for every single vector | ||||
8511 | // shuffle in existence we have chosen the least painful strategy. This is | ||||
8512 | // to essentially promote the boolean predicate to a 8-bit integer, where | ||||
8513 | // each predicate represents a byte. Then we fall back on a normal integer | ||||
8514 | // vector shuffle and convert the result back into a predicate vector. In | ||||
8515 | // many cases the generated code might be even better than scalar code | ||||
8516 | // operating on bits. Just imagine trying to shuffle 8 arbitrary 2-bit | ||||
8517 | // fields in a register into 8 other arbitrary 2-bit fields! | ||||
8518 | SDValue PredAsVector = PromoteMVEPredVector(dl, V1, VT, DAG); | ||||
8519 | EVT NewVT = PredAsVector.getValueType(); | ||||
8520 | |||||
8521 | // Do the shuffle! | ||||
8522 | SDValue Shuffled = DAG.getVectorShuffle(NewVT, dl, PredAsVector, | ||||
8523 | DAG.getUNDEF(NewVT), ShuffleMask); | ||||
8524 | |||||
8525 | // Now return the result of comparing the shuffled vector with zero, | ||||
8526 | // which will generate a real predicate, i.e. v4i1, v8i1 or v16i1. For a v2i1 | ||||
8527 | // we convert to a v4i1 compare to fill in the two halves of the i64 as i32s. | ||||
8528 | if (VT == MVT::v2i1) { | ||||
8529 | SDValue BC = DAG.getNode(ARMISD::VECTOR_REG_CAST, dl, MVT::v4i32, Shuffled); | ||||
8530 | SDValue Cmp = DAG.getNode(ARMISD::VCMPZ, dl, MVT::v4i1, BC, | ||||
8531 | DAG.getConstant(ARMCC::NE, dl, MVT::i32)); | ||||
8532 | return DAG.getNode(ARMISD::PREDICATE_CAST, dl, MVT::v2i1, Cmp); | ||||
8533 | } | ||||
8534 | return DAG.getNode(ARMISD::VCMPZ, dl, VT, Shuffled, | ||||
8535 | DAG.getConstant(ARMCC::NE, dl, MVT::i32)); | ||||
8536 | } | ||||
8537 | |||||
8538 | static SDValue LowerVECTOR_SHUFFLEUsingMovs(SDValue Op, | ||||
8539 | ArrayRef<int> ShuffleMask, | ||||
8540 | SelectionDAG &DAG) { | ||||
8541 | // Attempt to lower the vector shuffle using as many whole register movs as | ||||
8542 | // possible. This is useful for types smaller than 32bits, which would | ||||
8543 | // often otherwise become a series for grp movs. | ||||
8544 | SDLoc dl(Op); | ||||
8545 | EVT VT = Op.getValueType(); | ||||
8546 | if (VT.getScalarSizeInBits() >= 32) | ||||
8547 | return SDValue(); | ||||
8548 | |||||
8549 | assert((VT == MVT::v8i16 || VT == MVT::v8f16 || VT == MVT::v16i8) &&(static_cast <bool> ((VT == MVT::v8i16 || VT == MVT::v8f16 || VT == MVT::v16i8) && "Unexpected vector type") ? void (0) : __assert_fail ("(VT == MVT::v8i16 || VT == MVT::v8f16 || VT == MVT::v16i8) && \"Unexpected vector type\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 8550, __extension__ __PRETTY_FUNCTION__)) | ||||
8550 | "Unexpected vector type")(static_cast <bool> ((VT == MVT::v8i16 || VT == MVT::v8f16 || VT == MVT::v16i8) && "Unexpected vector type") ? void (0) : __assert_fail ("(VT == MVT::v8i16 || VT == MVT::v8f16 || VT == MVT::v16i8) && \"Unexpected vector type\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 8550, __extension__ __PRETTY_FUNCTION__)); | ||||
8551 | int NumElts = VT.getVectorNumElements(); | ||||
8552 | int QuarterSize = NumElts / 4; | ||||
8553 | // The four final parts of the vector, as i32's | ||||
8554 | SDValue Parts[4]; | ||||
8555 | |||||
8556 | // Look for full lane vmovs like <0,1,2,3> or <u,5,6,7> etc, (but not | ||||
8557 | // <u,u,u,u>), returning the vmov lane index | ||||
8558 | auto getMovIdx = [](ArrayRef<int> ShuffleMask, int Start, int Length) { | ||||
8559 | // Detect which mov lane this would be from the first non-undef element. | ||||
8560 | int MovIdx = -1; | ||||
8561 | for (int i = 0; i < Length; i++) { | ||||
8562 | if (ShuffleMask[Start + i] >= 0) { | ||||
8563 | if (ShuffleMask[Start + i] % Length != i) | ||||
8564 | return -1; | ||||
8565 | MovIdx = ShuffleMask[Start + i] / Length; | ||||
8566 | break; | ||||
8567 | } | ||||
8568 | } | ||||
8569 | // If all items are undef, leave this for other combines | ||||
8570 | if (MovIdx == -1) | ||||
8571 | return -1; | ||||
8572 | // Check the remaining values are the correct part of the same mov | ||||
8573 | for (int i = 1; i < Length; i++) { | ||||
8574 | if (ShuffleMask[Start + i] >= 0 && | ||||
8575 | (ShuffleMask[Start + i] / Length != MovIdx || | ||||
8576 | ShuffleMask[Start + i] % Length != i)) | ||||
8577 | return -1; | ||||
8578 | } | ||||
8579 | return MovIdx; | ||||
8580 | }; | ||||
8581 | |||||
8582 | for (int Part = 0; Part < 4; ++Part) { | ||||
8583 | // Does this part look like a mov | ||||
8584 | int Elt = getMovIdx(ShuffleMask, Part * QuarterSize, QuarterSize); | ||||
8585 | if (Elt != -1) { | ||||
8586 | SDValue Input = Op->getOperand(0); | ||||
8587 | if (Elt >= 4) { | ||||
8588 | Input = Op->getOperand(1); | ||||
8589 | Elt -= 4; | ||||
8590 | } | ||||
8591 | SDValue BitCast = DAG.getBitcast(MVT::v4f32, Input); | ||||
8592 | Parts[Part] = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f32, BitCast, | ||||
8593 | DAG.getConstant(Elt, dl, MVT::i32)); | ||||
8594 | } | ||||
8595 | } | ||||
8596 | |||||
8597 | // Nothing interesting found, just return | ||||
8598 | if (!Parts[0] && !Parts[1] && !Parts[2] && !Parts[3]) | ||||
8599 | return SDValue(); | ||||
8600 | |||||
8601 | // The other parts need to be built with the old shuffle vector, cast to a | ||||
8602 | // v4i32 and extract_vector_elts | ||||
8603 | if (!Parts[0] || !Parts[1] || !Parts[2] || !Parts[3]) { | ||||
8604 | SmallVector<int, 16> NewShuffleMask; | ||||
8605 | for (int Part = 0; Part < 4; ++Part) | ||||
8606 | for (int i = 0; i < QuarterSize; i++) | ||||
8607 | NewShuffleMask.push_back( | ||||
8608 | Parts[Part] ? -1 : ShuffleMask[Part * QuarterSize + i]); | ||||
8609 | SDValue NewShuffle = DAG.getVectorShuffle( | ||||
8610 | VT, dl, Op->getOperand(0), Op->getOperand(1), NewShuffleMask); | ||||
8611 | SDValue BitCast = DAG.getBitcast(MVT::v4f32, NewShuffle); | ||||
8612 | |||||
8613 | for (int Part = 0; Part < 4; ++Part) | ||||
8614 | if (!Parts[Part]) | ||||
8615 | Parts[Part] = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f32, | ||||
8616 | BitCast, DAG.getConstant(Part, dl, MVT::i32)); | ||||
8617 | } | ||||
8618 | // Build a vector out of the various parts and bitcast it back to the original | ||||
8619 | // type. | ||||
8620 | SDValue NewVec = DAG.getNode(ARMISD::BUILD_VECTOR, dl, MVT::v4f32, Parts); | ||||
8621 | return DAG.getBitcast(VT, NewVec); | ||||
8622 | } | ||||
8623 | |||||
8624 | static SDValue LowerVECTOR_SHUFFLEUsingOneOff(SDValue Op, | ||||
8625 | ArrayRef<int> ShuffleMask, | ||||
8626 | SelectionDAG &DAG) { | ||||
8627 | SDValue V1 = Op.getOperand(0); | ||||
8628 | SDValue V2 = Op.getOperand(1); | ||||
8629 | EVT VT = Op.getValueType(); | ||||
8630 | unsigned NumElts = VT.getVectorNumElements(); | ||||
8631 | |||||
8632 | // An One-Off Identity mask is one that is mostly an identity mask from as | ||||
8633 | // single source but contains a single element out-of-place, either from a | ||||
8634 | // different vector or from another position in the same vector. As opposed to | ||||
8635 | // lowering this via a ARMISD::BUILD_VECTOR we can generate an extract/insert | ||||
8636 | // pair directly. | ||||
8637 | auto isOneOffIdentityMask = [](ArrayRef<int> Mask, EVT VT, int BaseOffset, | ||||
8638 | int &OffElement) { | ||||
8639 | OffElement = -1; | ||||
8640 | int NonUndef = 0; | ||||
8641 | for (int i = 0, NumMaskElts = Mask.size(); i < NumMaskElts; ++i) { | ||||
8642 | if (Mask[i] == -1) | ||||
8643 | continue; | ||||
8644 | NonUndef++; | ||||
8645 | if (Mask[i] != i + BaseOffset) { | ||||
8646 | if (OffElement == -1) | ||||
8647 | OffElement = i; | ||||
8648 | else | ||||
8649 | return false; | ||||
8650 | } | ||||
8651 | } | ||||
8652 | return NonUndef > 2 && OffElement != -1; | ||||
8653 | }; | ||||
8654 | int OffElement; | ||||
8655 | SDValue VInput; | ||||
8656 | if (isOneOffIdentityMask(ShuffleMask, VT, 0, OffElement)) | ||||
8657 | VInput = V1; | ||||
8658 | else if (isOneOffIdentityMask(ShuffleMask, VT, NumElts, OffElement)) | ||||
8659 | VInput = V2; | ||||
8660 | else | ||||
8661 | return SDValue(); | ||||
8662 | |||||
8663 | SDLoc dl(Op); | ||||
8664 | EVT SVT = VT.getScalarType() == MVT::i8 || VT.getScalarType() == MVT::i16 | ||||
8665 | ? MVT::i32 | ||||
8666 | : VT.getScalarType(); | ||||
8667 | SDValue Elt = DAG.getNode( | ||||
8668 | ISD::EXTRACT_VECTOR_ELT, dl, SVT, | ||||
8669 | ShuffleMask[OffElement] < (int)NumElts ? V1 : V2, | ||||
8670 | DAG.getVectorIdxConstant(ShuffleMask[OffElement] % NumElts, dl)); | ||||
8671 | return DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VT, VInput, Elt, | ||||
8672 | DAG.getVectorIdxConstant(OffElement % NumElts, dl)); | ||||
8673 | } | ||||
8674 | |||||
8675 | static SDValue LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG, | ||||
8676 | const ARMSubtarget *ST) { | ||||
8677 | SDValue V1 = Op.getOperand(0); | ||||
8678 | SDValue V2 = Op.getOperand(1); | ||||
8679 | SDLoc dl(Op); | ||||
8680 | EVT VT = Op.getValueType(); | ||||
8681 | ShuffleVectorSDNode *SVN = cast<ShuffleVectorSDNode>(Op.getNode()); | ||||
8682 | unsigned EltSize = VT.getScalarSizeInBits(); | ||||
8683 | |||||
8684 | if (ST->hasMVEIntegerOps() && EltSize == 1) | ||||
8685 | return LowerVECTOR_SHUFFLE_i1(Op, DAG, ST); | ||||
8686 | |||||
8687 | // Convert shuffles that are directly supported on NEON to target-specific | ||||
8688 | // DAG nodes, instead of keeping them as shuffles and matching them again | ||||
8689 | // during code selection. This is more efficient and avoids the possibility | ||||
8690 | // of inconsistencies between legalization and selection. | ||||
8691 | // FIXME: floating-point vectors should be canonicalized to integer vectors | ||||
8692 | // of the same time so that they get CSEd properly. | ||||
8693 | ArrayRef<int> ShuffleMask = SVN->getMask(); | ||||
8694 | |||||
8695 | if (EltSize <= 32) { | ||||
8696 | if (SVN->isSplat()) { | ||||
8697 | int Lane = SVN->getSplatIndex(); | ||||
8698 | // If this is undef splat, generate it via "just" vdup, if possible. | ||||
8699 | if (Lane == -1) Lane = 0; | ||||
8700 | |||||
8701 | // Test if V1 is a SCALAR_TO_VECTOR. | ||||
8702 | if (Lane == 0 && V1.getOpcode() == ISD::SCALAR_TO_VECTOR) { | ||||
8703 | return DAG.getNode(ARMISD::VDUP, dl, VT, V1.getOperand(0)); | ||||
8704 | } | ||||
8705 | // Test if V1 is a BUILD_VECTOR which is equivalent to a SCALAR_TO_VECTOR | ||||
8706 | // (and probably will turn into a SCALAR_TO_VECTOR once legalization | ||||
8707 | // reaches it). | ||||
8708 | if (Lane == 0 && V1.getOpcode() == ISD::BUILD_VECTOR && | ||||
8709 | !isa<ConstantSDNode>(V1.getOperand(0))) { | ||||
8710 | bool IsScalarToVector = true; | ||||
8711 | for (unsigned i = 1, e = V1.getNumOperands(); i != e; ++i) | ||||
8712 | if (!V1.getOperand(i).isUndef()) { | ||||
8713 | IsScalarToVector = false; | ||||
8714 | break; | ||||
8715 | } | ||||
8716 | if (IsScalarToVector) | ||||
8717 | return DAG.getNode(ARMISD::VDUP, dl, VT, V1.getOperand(0)); | ||||
8718 | } | ||||
8719 | return DAG.getNode(ARMISD::VDUPLANE, dl, VT, V1, | ||||
8720 | DAG.getConstant(Lane, dl, MVT::i32)); | ||||
8721 | } | ||||
8722 | |||||
8723 | bool ReverseVEXT = false; | ||||
8724 | unsigned Imm = 0; | ||||
8725 | if (ST->hasNEON() && isVEXTMask(ShuffleMask, VT, ReverseVEXT, Imm)) { | ||||
8726 | if (ReverseVEXT) | ||||
8727 | std::swap(V1, V2); | ||||
8728 | return DAG.getNode(ARMISD::VEXT, dl, VT, V1, V2, | ||||
8729 | DAG.getConstant(Imm, dl, MVT::i32)); | ||||
8730 | } | ||||
8731 | |||||
8732 | if (isVREVMask(ShuffleMask, VT, 64)) | ||||
8733 | return DAG.getNode(ARMISD::VREV64, dl, VT, V1); | ||||
8734 | if (isVREVMask(ShuffleMask, VT, 32)) | ||||
8735 | return DAG.getNode(ARMISD::VREV32, dl, VT, V1); | ||||
8736 | if (isVREVMask(ShuffleMask, VT, 16)) | ||||
8737 | return DAG.getNode(ARMISD::VREV16, dl, VT, V1); | ||||
8738 | |||||
8739 | if (ST->hasNEON() && V2->isUndef() && isSingletonVEXTMask(ShuffleMask, VT, Imm)) { | ||||
8740 | return DAG.getNode(ARMISD::VEXT, dl, VT, V1, V1, | ||||
8741 | DAG.getConstant(Imm, dl, MVT::i32)); | ||||
8742 | } | ||||
8743 | |||||
8744 | // Check for Neon shuffles that modify both input vectors in place. | ||||
8745 | // If both results are used, i.e., if there are two shuffles with the same | ||||
8746 | // source operands and with masks corresponding to both results of one of | ||||
8747 | // these operations, DAG memoization will ensure that a single node is | ||||
8748 | // used for both shuffles. | ||||
8749 | unsigned WhichResult = 0; | ||||
8750 | bool isV_UNDEF = false; | ||||
8751 | if (ST->hasNEON()) { | ||||
8752 | if (unsigned ShuffleOpc = isNEONTwoResultShuffleMask( | ||||
8753 | ShuffleMask, VT, WhichResult, isV_UNDEF)) { | ||||
8754 | if (isV_UNDEF) | ||||
8755 | V2 = V1; | ||||
8756 | return DAG.getNode(ShuffleOpc, dl, DAG.getVTList(VT, VT), V1, V2) | ||||
8757 | .getValue(WhichResult); | ||||
8758 | } | ||||
8759 | } | ||||
8760 | if (ST->hasMVEIntegerOps()) { | ||||
8761 | if (isVMOVNMask(ShuffleMask, VT, false, false)) | ||||
8762 | return DAG.getNode(ARMISD::VMOVN, dl, VT, V2, V1, | ||||
8763 | DAG.getConstant(0, dl, MVT::i32)); | ||||
8764 | if (isVMOVNMask(ShuffleMask, VT, true, false)) | ||||
8765 | return DAG.getNode(ARMISD::VMOVN, dl, VT, V1, V2, | ||||
8766 | DAG.getConstant(1, dl, MVT::i32)); | ||||
8767 | if (isVMOVNMask(ShuffleMask, VT, true, true)) | ||||
8768 | return DAG.getNode(ARMISD::VMOVN, dl, VT, V1, V1, | ||||
8769 | DAG.getConstant(1, dl, MVT::i32)); | ||||
8770 | } | ||||
8771 | |||||
8772 | // Also check for these shuffles through CONCAT_VECTORS: we canonicalize | ||||
8773 | // shuffles that produce a result larger than their operands with: | ||||
8774 | // shuffle(concat(v1, undef), concat(v2, undef)) | ||||
8775 | // -> | ||||
8776 | // shuffle(concat(v1, v2), undef) | ||||
8777 | // because we can access quad vectors (see PerformVECTOR_SHUFFLECombine). | ||||
8778 | // | ||||
8779 | // This is useful in the general case, but there are special cases where | ||||
8780 | // native shuffles produce larger results: the two-result ops. | ||||
8781 | // | ||||
8782 | // Look through the concat when lowering them: | ||||
8783 | // shuffle(concat(v1, v2), undef) | ||||
8784 | // -> | ||||
8785 | // concat(VZIP(v1, v2):0, :1) | ||||
8786 | // | ||||
8787 | if (ST->hasNEON() && V1->getOpcode() == ISD::CONCAT_VECTORS && V2->isUndef()) { | ||||
8788 | SDValue SubV1 = V1->getOperand(0); | ||||
8789 | SDValue SubV2 = V1->getOperand(1); | ||||
8790 | EVT SubVT = SubV1.getValueType(); | ||||
8791 | |||||
8792 | // We expect these to have been canonicalized to -1. | ||||
8793 | assert(llvm::all_of(ShuffleMask, [&](int i) {(static_cast <bool> (llvm::all_of(ShuffleMask, [&]( int i) { return i < (int)VT.getVectorNumElements(); }) && "Unexpected shuffle index into UNDEF operand!") ? void (0) : __assert_fail ("llvm::all_of(ShuffleMask, [&](int i) { return i < (int)VT.getVectorNumElements(); }) && \"Unexpected shuffle index into UNDEF operand!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 8795, __extension__ __PRETTY_FUNCTION__)) | ||||
8794 | return i < (int)VT.getVectorNumElements();(static_cast <bool> (llvm::all_of(ShuffleMask, [&]( int i) { return i < (int)VT.getVectorNumElements(); }) && "Unexpected shuffle index into UNDEF operand!") ? void (0) : __assert_fail ("llvm::all_of(ShuffleMask, [&](int i) { return i < (int)VT.getVectorNumElements(); }) && \"Unexpected shuffle index into UNDEF operand!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 8795, __extension__ __PRETTY_FUNCTION__)) | ||||
8795 | }) && "Unexpected shuffle index into UNDEF operand!")(static_cast <bool> (llvm::all_of(ShuffleMask, [&]( int i) { return i < (int)VT.getVectorNumElements(); }) && "Unexpected shuffle index into UNDEF operand!") ? void (0) : __assert_fail ("llvm::all_of(ShuffleMask, [&](int i) { return i < (int)VT.getVectorNumElements(); }) && \"Unexpected shuffle index into UNDEF operand!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 8795, __extension__ __PRETTY_FUNCTION__)); | ||||
8796 | |||||
8797 | if (unsigned ShuffleOpc = isNEONTwoResultShuffleMask( | ||||
8798 | ShuffleMask, SubVT, WhichResult, isV_UNDEF)) { | ||||
8799 | if (isV_UNDEF) | ||||
8800 | SubV2 = SubV1; | ||||
8801 | assert((WhichResult == 0) &&(static_cast <bool> ((WhichResult == 0) && "In-place shuffle of concat can only have one result!" ) ? void (0) : __assert_fail ("(WhichResult == 0) && \"In-place shuffle of concat can only have one result!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 8802, __extension__ __PRETTY_FUNCTION__)) | ||||
8802 | "In-place shuffle of concat can only have one result!")(static_cast <bool> ((WhichResult == 0) && "In-place shuffle of concat can only have one result!" ) ? void (0) : __assert_fail ("(WhichResult == 0) && \"In-place shuffle of concat can only have one result!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 8802, __extension__ __PRETTY_FUNCTION__)); | ||||
8803 | SDValue Res = DAG.getNode(ShuffleOpc, dl, DAG.getVTList(SubVT, SubVT), | ||||
8804 | SubV1, SubV2); | ||||
8805 | return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, Res.getValue(0), | ||||
8806 | Res.getValue(1)); | ||||
8807 | } | ||||
8808 | } | ||||
8809 | } | ||||
8810 | |||||
8811 | if (ST->hasMVEIntegerOps() && EltSize <= 32) | ||||
8812 | if (SDValue V = LowerVECTOR_SHUFFLEUsingOneOff(Op, ShuffleMask, DAG)) | ||||
8813 | return V; | ||||
8814 | |||||
8815 | // If the shuffle is not directly supported and it has 4 elements, use | ||||
8816 | // the PerfectShuffle-generated table to synthesize it from other shuffles. | ||||
8817 | unsigned NumElts = VT.getVectorNumElements(); | ||||
8818 | if (NumElts == 4) { | ||||
8819 | unsigned PFIndexes[4]; | ||||
8820 | for (unsigned i = 0; i != 4; ++i) { | ||||
8821 | if (ShuffleMask[i] < 0) | ||||
8822 | PFIndexes[i] = 8; | ||||
8823 | else | ||||
8824 | PFIndexes[i] = ShuffleMask[i]; | ||||
8825 | } | ||||
8826 | |||||
8827 | // Compute the index in the perfect shuffle table. | ||||
8828 | unsigned PFTableIndex = | ||||
8829 | PFIndexes[0]*9*9*9+PFIndexes[1]*9*9+PFIndexes[2]*9+PFIndexes[3]; | ||||
8830 | unsigned PFEntry = PerfectShuffleTable[PFTableIndex]; | ||||
8831 | unsigned Cost = (PFEntry >> 30); | ||||
8832 | |||||
8833 | if (Cost <= 4) { | ||||
8834 | if (ST->hasNEON()) | ||||
8835 | return GeneratePerfectShuffle(PFEntry, V1, V2, DAG, dl); | ||||
8836 | else if (isLegalMVEShuffleOp(PFEntry)) { | ||||
8837 | unsigned LHSID = (PFEntry >> 13) & ((1 << 13)-1); | ||||
8838 | unsigned RHSID = (PFEntry >> 0) & ((1 << 13)-1); | ||||
8839 | unsigned PFEntryLHS = PerfectShuffleTable[LHSID]; | ||||
8840 | unsigned PFEntryRHS = PerfectShuffleTable[RHSID]; | ||||
8841 | if (isLegalMVEShuffleOp(PFEntryLHS) && isLegalMVEShuffleOp(PFEntryRHS)) | ||||
8842 | return GeneratePerfectShuffle(PFEntry, V1, V2, DAG, dl); | ||||
8843 | } | ||||
8844 | } | ||||
8845 | } | ||||
8846 | |||||
8847 | // Implement shuffles with 32- or 64-bit elements as ARMISD::BUILD_VECTORs. | ||||
8848 | if (EltSize >= 32) { | ||||
8849 | // Do the expansion with floating-point types, since that is what the VFP | ||||
8850 | // registers are defined to use, and since i64 is not legal. | ||||
8851 | EVT EltVT = EVT::getFloatingPointVT(EltSize); | ||||
8852 | EVT VecVT = EVT::getVectorVT(*DAG.getContext(), EltVT, NumElts); | ||||
8853 | V1 = DAG.getNode(ISD::BITCAST, dl, VecVT, V1); | ||||
8854 | V2 = DAG.getNode(ISD::BITCAST, dl, VecVT, V2); | ||||
8855 | SmallVector<SDValue, 8> Ops; | ||||
8856 | for (unsigned i = 0; i < NumElts; ++i) { | ||||
8857 | if (ShuffleMask[i] < 0) | ||||
8858 | Ops.push_back(DAG.getUNDEF(EltVT)); | ||||
8859 | else | ||||
8860 | Ops.push_back(DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, EltVT, | ||||
8861 | ShuffleMask[i] < (int)NumElts ? V1 : V2, | ||||
8862 | DAG.getConstant(ShuffleMask[i] & (NumElts-1), | ||||
8863 | dl, MVT::i32))); | ||||
8864 | } | ||||
8865 | SDValue Val = DAG.getNode(ARMISD::BUILD_VECTOR, dl, VecVT, Ops); | ||||
8866 | return DAG.getNode(ISD::BITCAST, dl, VT, Val); | ||||
8867 | } | ||||
8868 | |||||
8869 | if ((VT == MVT::v8i16 || VT == MVT::v8f16 || VT == MVT::v16i8) && | ||||
8870 | isReverseMask(ShuffleMask, VT)) | ||||
8871 | return LowerReverse_VECTOR_SHUFFLE(Op, DAG); | ||||
8872 | |||||
8873 | if (ST->hasNEON() && VT == MVT::v8i8) | ||||
8874 | if (SDValue NewOp = LowerVECTOR_SHUFFLEv8i8(Op, ShuffleMask, DAG)) | ||||
8875 | return NewOp; | ||||
8876 | |||||
8877 | if (ST->hasMVEIntegerOps()) | ||||
8878 | if (SDValue NewOp = LowerVECTOR_SHUFFLEUsingMovs(Op, ShuffleMask, DAG)) | ||||
8879 | return NewOp; | ||||
8880 | |||||
8881 | return SDValue(); | ||||
8882 | } | ||||
8883 | |||||
8884 | static SDValue LowerINSERT_VECTOR_ELT_i1(SDValue Op, SelectionDAG &DAG, | ||||
8885 | const ARMSubtarget *ST) { | ||||
8886 | EVT VecVT = Op.getOperand(0).getValueType(); | ||||
8887 | SDLoc dl(Op); | ||||
8888 | |||||
8889 | assert(ST->hasMVEIntegerOps() &&(static_cast <bool> (ST->hasMVEIntegerOps() && "LowerINSERT_VECTOR_ELT_i1 called without MVE!") ? void (0) : __assert_fail ("ST->hasMVEIntegerOps() && \"LowerINSERT_VECTOR_ELT_i1 called without MVE!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 8890, __extension__ __PRETTY_FUNCTION__)) | ||||
8890 | "LowerINSERT_VECTOR_ELT_i1 called without MVE!")(static_cast <bool> (ST->hasMVEIntegerOps() && "LowerINSERT_VECTOR_ELT_i1 called without MVE!") ? void (0) : __assert_fail ("ST->hasMVEIntegerOps() && \"LowerINSERT_VECTOR_ELT_i1 called without MVE!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 8890, __extension__ __PRETTY_FUNCTION__)); | ||||
8891 | |||||
8892 | SDValue Conv = | ||||
8893 | DAG.getNode(ARMISD::PREDICATE_CAST, dl, MVT::i32, Op->getOperand(0)); | ||||
8894 | unsigned Lane = cast<ConstantSDNode>(Op.getOperand(2))->getZExtValue(); | ||||
8895 | unsigned LaneWidth = | ||||
8896 | getVectorTyFromPredicateVector(VecVT).getScalarSizeInBits() / 8; | ||||
8897 | unsigned Mask = ((1 << LaneWidth) - 1) << Lane * LaneWidth; | ||||
8898 | SDValue Ext = DAG.getNode(ISD::SIGN_EXTEND_INREG, dl, MVT::i32, | ||||
8899 | Op.getOperand(1), DAG.getValueType(MVT::i1)); | ||||
8900 | SDValue BFI = DAG.getNode(ARMISD::BFI, dl, MVT::i32, Conv, Ext, | ||||
8901 | DAG.getConstant(~Mask, dl, MVT::i32)); | ||||
8902 | return DAG.getNode(ARMISD::PREDICATE_CAST, dl, Op.getValueType(), BFI); | ||||
8903 | } | ||||
8904 | |||||
8905 | SDValue ARMTargetLowering::LowerINSERT_VECTOR_ELT(SDValue Op, | ||||
8906 | SelectionDAG &DAG) const { | ||||
8907 | // INSERT_VECTOR_ELT is legal only for immediate indexes. | ||||
8908 | SDValue Lane = Op.getOperand(2); | ||||
8909 | if (!isa<ConstantSDNode>(Lane)) | ||||
8910 | return SDValue(); | ||||
8911 | |||||
8912 | SDValue Elt = Op.getOperand(1); | ||||
8913 | EVT EltVT = Elt.getValueType(); | ||||
8914 | |||||
8915 | if (Subtarget->hasMVEIntegerOps() && | ||||
8916 | Op.getValueType().getScalarSizeInBits() == 1) | ||||
8917 | return LowerINSERT_VECTOR_ELT_i1(Op, DAG, Subtarget); | ||||
8918 | |||||
8919 | if (getTypeAction(*DAG.getContext(), EltVT) == | ||||
8920 | TargetLowering::TypePromoteFloat) { | ||||
8921 | // INSERT_VECTOR_ELT doesn't want f16 operands promoting to f32, | ||||
8922 | // but the type system will try to do that if we don't intervene. | ||||
8923 | // Reinterpret any such vector-element insertion as one with the | ||||
8924 | // corresponding integer types. | ||||
8925 | |||||
8926 | SDLoc dl(Op); | ||||
8927 | |||||
8928 | EVT IEltVT = MVT::getIntegerVT(EltVT.getScalarSizeInBits()); | ||||
8929 | assert(getTypeAction(*DAG.getContext(), IEltVT) !=(static_cast <bool> (getTypeAction(*DAG.getContext(), IEltVT ) != TargetLowering::TypePromoteFloat) ? void (0) : __assert_fail ("getTypeAction(*DAG.getContext(), IEltVT) != TargetLowering::TypePromoteFloat" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 8930, __extension__ __PRETTY_FUNCTION__)) | ||||
8930 | TargetLowering::TypePromoteFloat)(static_cast <bool> (getTypeAction(*DAG.getContext(), IEltVT ) != TargetLowering::TypePromoteFloat) ? void (0) : __assert_fail ("getTypeAction(*DAG.getContext(), IEltVT) != TargetLowering::TypePromoteFloat" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 8930, __extension__ __PRETTY_FUNCTION__)); | ||||
8931 | |||||
8932 | SDValue VecIn = Op.getOperand(0); | ||||
8933 | EVT VecVT = VecIn.getValueType(); | ||||
8934 | EVT IVecVT = EVT::getVectorVT(*DAG.getContext(), IEltVT, | ||||
8935 | VecVT.getVectorNumElements()); | ||||
8936 | |||||
8937 | SDValue IElt = DAG.getNode(ISD::BITCAST, dl, IEltVT, Elt); | ||||
8938 | SDValue IVecIn = DAG.getNode(ISD::BITCAST, dl, IVecVT, VecIn); | ||||
8939 | SDValue IVecOut = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, IVecVT, | ||||
8940 | IVecIn, IElt, Lane); | ||||
8941 | return DAG.getNode(ISD::BITCAST, dl, VecVT, IVecOut); | ||||
8942 | } | ||||
8943 | |||||
8944 | return Op; | ||||
8945 | } | ||||
8946 | |||||
8947 | static SDValue LowerEXTRACT_VECTOR_ELT_i1(SDValue Op, SelectionDAG &DAG, | ||||
8948 | const ARMSubtarget *ST) { | ||||
8949 | EVT VecVT = Op.getOperand(0).getValueType(); | ||||
8950 | SDLoc dl(Op); | ||||
8951 | |||||
8952 | assert(ST->hasMVEIntegerOps() &&(static_cast <bool> (ST->hasMVEIntegerOps() && "LowerINSERT_VECTOR_ELT_i1 called without MVE!") ? void (0) : __assert_fail ("ST->hasMVEIntegerOps() && \"LowerINSERT_VECTOR_ELT_i1 called without MVE!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 8953, __extension__ __PRETTY_FUNCTION__)) | ||||
8953 | "LowerINSERT_VECTOR_ELT_i1 called without MVE!")(static_cast <bool> (ST->hasMVEIntegerOps() && "LowerINSERT_VECTOR_ELT_i1 called without MVE!") ? void (0) : __assert_fail ("ST->hasMVEIntegerOps() && \"LowerINSERT_VECTOR_ELT_i1 called without MVE!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 8953, __extension__ __PRETTY_FUNCTION__)); | ||||
8954 | |||||
8955 | SDValue Conv = | ||||
8956 | DAG.getNode(ARMISD::PREDICATE_CAST, dl, MVT::i32, Op->getOperand(0)); | ||||
8957 | unsigned Lane = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue(); | ||||
8958 | unsigned LaneWidth = | ||||
8959 | getVectorTyFromPredicateVector(VecVT).getScalarSizeInBits() / 8; | ||||
8960 | SDValue Shift = DAG.getNode(ISD::SRL, dl, MVT::i32, Conv, | ||||
8961 | DAG.getConstant(Lane * LaneWidth, dl, MVT::i32)); | ||||
8962 | return Shift; | ||||
8963 | } | ||||
8964 | |||||
8965 | static SDValue LowerEXTRACT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG, | ||||
8966 | const ARMSubtarget *ST) { | ||||
8967 | // EXTRACT_VECTOR_ELT is legal only for immediate indexes. | ||||
8968 | SDValue Lane = Op.getOperand(1); | ||||
8969 | if (!isa<ConstantSDNode>(Lane)) | ||||
8970 | return SDValue(); | ||||
8971 | |||||
8972 | SDValue Vec = Op.getOperand(0); | ||||
8973 | EVT VT = Vec.getValueType(); | ||||
8974 | |||||
8975 | if (ST->hasMVEIntegerOps() && VT.getScalarSizeInBits() == 1) | ||||
8976 | return LowerEXTRACT_VECTOR_ELT_i1(Op, DAG, ST); | ||||
8977 | |||||
8978 | if (Op.getValueType() == MVT::i32 && Vec.getScalarValueSizeInBits() < 32) { | ||||
8979 | SDLoc dl(Op); | ||||
8980 | return DAG.getNode(ARMISD::VGETLANEu, dl, MVT::i32, Vec, Lane); | ||||
8981 | } | ||||
8982 | |||||
8983 | return Op; | ||||
8984 | } | ||||
8985 | |||||
8986 | static SDValue LowerCONCAT_VECTORS_i1(SDValue Op, SelectionDAG &DAG, | ||||
8987 | const ARMSubtarget *ST) { | ||||
8988 | SDLoc dl(Op); | ||||
8989 | assert(Op.getValueType().getScalarSizeInBits() == 1 &&(static_cast <bool> (Op.getValueType().getScalarSizeInBits () == 1 && "Unexpected custom CONCAT_VECTORS lowering" ) ? void (0) : __assert_fail ("Op.getValueType().getScalarSizeInBits() == 1 && \"Unexpected custom CONCAT_VECTORS lowering\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 8990, __extension__ __PRETTY_FUNCTION__)) | ||||
8990 | "Unexpected custom CONCAT_VECTORS lowering")(static_cast <bool> (Op.getValueType().getScalarSizeInBits () == 1 && "Unexpected custom CONCAT_VECTORS lowering" ) ? void (0) : __assert_fail ("Op.getValueType().getScalarSizeInBits() == 1 && \"Unexpected custom CONCAT_VECTORS lowering\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 8990, __extension__ __PRETTY_FUNCTION__)); | ||||
8991 | assert(isPowerOf2_32(Op.getNumOperands()) &&(static_cast <bool> (isPowerOf2_32(Op.getNumOperands()) && "Unexpected custom CONCAT_VECTORS lowering") ? void (0) : __assert_fail ("isPowerOf2_32(Op.getNumOperands()) && \"Unexpected custom CONCAT_VECTORS lowering\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 8992, __extension__ __PRETTY_FUNCTION__)) | ||||
8992 | "Unexpected custom CONCAT_VECTORS lowering")(static_cast <bool> (isPowerOf2_32(Op.getNumOperands()) && "Unexpected custom CONCAT_VECTORS lowering") ? void (0) : __assert_fail ("isPowerOf2_32(Op.getNumOperands()) && \"Unexpected custom CONCAT_VECTORS lowering\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 8992, __extension__ __PRETTY_FUNCTION__)); | ||||
8993 | assert(ST->hasMVEIntegerOps() &&(static_cast <bool> (ST->hasMVEIntegerOps() && "CONCAT_VECTORS lowering only supported for MVE") ? void (0) : __assert_fail ("ST->hasMVEIntegerOps() && \"CONCAT_VECTORS lowering only supported for MVE\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 8994, __extension__ __PRETTY_FUNCTION__)) | ||||
8994 | "CONCAT_VECTORS lowering only supported for MVE")(static_cast <bool> (ST->hasMVEIntegerOps() && "CONCAT_VECTORS lowering only supported for MVE") ? void (0) : __assert_fail ("ST->hasMVEIntegerOps() && \"CONCAT_VECTORS lowering only supported for MVE\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 8994, __extension__ __PRETTY_FUNCTION__)); | ||||
8995 | |||||
8996 | auto ConcatPair = [&](SDValue V1, SDValue V2) { | ||||
8997 | EVT Op1VT = V1.getValueType(); | ||||
8998 | EVT Op2VT = V2.getValueType(); | ||||
8999 | assert(Op1VT == Op2VT && "Operand types don't match!")(static_cast <bool> (Op1VT == Op2VT && "Operand types don't match!" ) ? void (0) : __assert_fail ("Op1VT == Op2VT && \"Operand types don't match!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 8999, __extension__ __PRETTY_FUNCTION__)); | ||||
9000 | EVT VT = Op1VT.getDoubleNumVectorElementsVT(*DAG.getContext()); | ||||
9001 | |||||
9002 | SDValue NewV1 = PromoteMVEPredVector(dl, V1, Op1VT, DAG); | ||||
9003 | SDValue NewV2 = PromoteMVEPredVector(dl, V2, Op2VT, DAG); | ||||
9004 | |||||
9005 | // We now have Op1 + Op2 promoted to vectors of integers, where v8i1 gets | ||||
9006 | // promoted to v8i16, etc. | ||||
9007 | MVT ElType = | ||||
9008 | getVectorTyFromPredicateVector(VT).getScalarType().getSimpleVT(); | ||||
9009 | unsigned NumElts = 2 * Op1VT.getVectorNumElements(); | ||||
9010 | |||||
9011 | // Extract the vector elements from Op1 and Op2 one by one and truncate them | ||||
9012 | // to be the right size for the destination. For example, if Op1 is v4i1 | ||||
9013 | // then the promoted vector is v4i32. The result of concatentation gives a | ||||
9014 | // v8i1, which when promoted is v8i16. That means each i32 element from Op1 | ||||
9015 | // needs truncating to i16 and inserting in the result. | ||||
9016 | EVT ConcatVT = MVT::getVectorVT(ElType, NumElts); | ||||
9017 | SDValue ConVec = DAG.getNode(ISD::UNDEF, dl, ConcatVT); | ||||
9018 | auto ExtractInto = [&DAG, &dl](SDValue NewV, SDValue ConVec, unsigned &j) { | ||||
9019 | EVT NewVT = NewV.getValueType(); | ||||
9020 | EVT ConcatVT = ConVec.getValueType(); | ||||
9021 | for (unsigned i = 0, e = NewVT.getVectorNumElements(); i < e; i++, j++) { | ||||
9022 | SDValue Elt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32, NewV, | ||||
9023 | DAG.getIntPtrConstant(i, dl)); | ||||
9024 | ConVec = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, ConcatVT, ConVec, Elt, | ||||
9025 | DAG.getConstant(j, dl, MVT::i32)); | ||||
9026 | } | ||||
9027 | return ConVec; | ||||
9028 | }; | ||||
9029 | unsigned j = 0; | ||||
9030 | ConVec = ExtractInto(NewV1, ConVec, j); | ||||
9031 | ConVec = ExtractInto(NewV2, ConVec, j); | ||||
9032 | |||||
9033 | // Now return the result of comparing the subvector with zero, which will | ||||
9034 | // generate a real predicate, i.e. v4i1, v8i1 or v16i1. For a v2i1 we | ||||
9035 | // convert to a v4i1 compare to fill in the two halves of the i64 as i32s. | ||||
9036 | if (VT == MVT::v2i1) { | ||||
9037 | SDValue BC = DAG.getNode(ARMISD::VECTOR_REG_CAST, dl, MVT::v4i32, ConVec); | ||||
9038 | SDValue Cmp = DAG.getNode(ARMISD::VCMPZ, dl, MVT::v4i1, BC, | ||||
9039 | DAG.getConstant(ARMCC::NE, dl, MVT::i32)); | ||||
9040 | return DAG.getNode(ARMISD::PREDICATE_CAST, dl, MVT::v2i1, Cmp); | ||||
9041 | } | ||||
9042 | return DAG.getNode(ARMISD::VCMPZ, dl, VT, ConVec, | ||||
9043 | DAG.getConstant(ARMCC::NE, dl, MVT::i32)); | ||||
9044 | }; | ||||
9045 | |||||
9046 | // Concat each pair of subvectors and pack into the lower half of the array. | ||||
9047 | SmallVector<SDValue> ConcatOps(Op->op_begin(), Op->op_end()); | ||||
9048 | while (ConcatOps.size() > 1) { | ||||
9049 | for (unsigned I = 0, E = ConcatOps.size(); I != E; I += 2) { | ||||
9050 | SDValue V1 = ConcatOps[I]; | ||||
9051 | SDValue V2 = ConcatOps[I + 1]; | ||||
9052 | ConcatOps[I / 2] = ConcatPair(V1, V2); | ||||
9053 | } | ||||
9054 | ConcatOps.resize(ConcatOps.size() / 2); | ||||
9055 | } | ||||
9056 | return ConcatOps[0]; | ||||
9057 | } | ||||
9058 | |||||
9059 | static SDValue LowerCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG, | ||||
9060 | const ARMSubtarget *ST) { | ||||
9061 | EVT VT = Op->getValueType(0); | ||||
9062 | if (ST->hasMVEIntegerOps() && VT.getScalarSizeInBits() == 1) | ||||
9063 | return LowerCONCAT_VECTORS_i1(Op, DAG, ST); | ||||
9064 | |||||
9065 | // The only time a CONCAT_VECTORS operation can have legal types is when | ||||
9066 | // two 64-bit vectors are concatenated to a 128-bit vector. | ||||
9067 | assert(Op.getValueType().is128BitVector() && Op.getNumOperands() == 2 &&(static_cast <bool> (Op.getValueType().is128BitVector() && Op.getNumOperands() == 2 && "unexpected CONCAT_VECTORS" ) ? void (0) : __assert_fail ("Op.getValueType().is128BitVector() && Op.getNumOperands() == 2 && \"unexpected CONCAT_VECTORS\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 9068, __extension__ __PRETTY_FUNCTION__)) | ||||
9068 | "unexpected CONCAT_VECTORS")(static_cast <bool> (Op.getValueType().is128BitVector() && Op.getNumOperands() == 2 && "unexpected CONCAT_VECTORS" ) ? void (0) : __assert_fail ("Op.getValueType().is128BitVector() && Op.getNumOperands() == 2 && \"unexpected CONCAT_VECTORS\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 9068, __extension__ __PRETTY_FUNCTION__)); | ||||
9069 | SDLoc dl(Op); | ||||
9070 | SDValue Val = DAG.getUNDEF(MVT::v2f64); | ||||
9071 | SDValue Op0 = Op.getOperand(0); | ||||
9072 | SDValue Op1 = Op.getOperand(1); | ||||
9073 | if (!Op0.isUndef()) | ||||
9074 | Val = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, Val, | ||||
9075 | DAG.getNode(ISD::BITCAST, dl, MVT::f64, Op0), | ||||
9076 | DAG.getIntPtrConstant(0, dl)); | ||||
9077 | if (!Op1.isUndef()) | ||||
9078 | Val = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, Val, | ||||
9079 | DAG.getNode(ISD::BITCAST, dl, MVT::f64, Op1), | ||||
9080 | DAG.getIntPtrConstant(1, dl)); | ||||
9081 | return DAG.getNode(ISD::BITCAST, dl, Op.getValueType(), Val); | ||||
9082 | } | ||||
9083 | |||||
9084 | static SDValue LowerEXTRACT_SUBVECTOR(SDValue Op, SelectionDAG &DAG, | ||||
9085 | const ARMSubtarget *ST) { | ||||
9086 | SDValue V1 = Op.getOperand(0); | ||||
9087 | SDValue V2 = Op.getOperand(1); | ||||
9088 | SDLoc dl(Op); | ||||
9089 | EVT VT = Op.getValueType(); | ||||
9090 | EVT Op1VT = V1.getValueType(); | ||||
9091 | unsigned NumElts = VT.getVectorNumElements(); | ||||
9092 | unsigned Index = cast<ConstantSDNode>(V2)->getZExtValue(); | ||||
9093 | |||||
9094 | assert(VT.getScalarSizeInBits() == 1 &&(static_cast <bool> (VT.getScalarSizeInBits() == 1 && "Unexpected custom EXTRACT_SUBVECTOR lowering") ? void (0) : __assert_fail ("VT.getScalarSizeInBits() == 1 && \"Unexpected custom EXTRACT_SUBVECTOR lowering\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 9095, __extension__ __PRETTY_FUNCTION__)) | ||||
9095 | "Unexpected custom EXTRACT_SUBVECTOR lowering")(static_cast <bool> (VT.getScalarSizeInBits() == 1 && "Unexpected custom EXTRACT_SUBVECTOR lowering") ? void (0) : __assert_fail ("VT.getScalarSizeInBits() == 1 && \"Unexpected custom EXTRACT_SUBVECTOR lowering\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 9095, __extension__ __PRETTY_FUNCTION__)); | ||||
9096 | assert(ST->hasMVEIntegerOps() &&(static_cast <bool> (ST->hasMVEIntegerOps() && "EXTRACT_SUBVECTOR lowering only supported for MVE") ? void ( 0) : __assert_fail ("ST->hasMVEIntegerOps() && \"EXTRACT_SUBVECTOR lowering only supported for MVE\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 9097, __extension__ __PRETTY_FUNCTION__)) | ||||
9097 | "EXTRACT_SUBVECTOR lowering only supported for MVE")(static_cast <bool> (ST->hasMVEIntegerOps() && "EXTRACT_SUBVECTOR lowering only supported for MVE") ? void ( 0) : __assert_fail ("ST->hasMVEIntegerOps() && \"EXTRACT_SUBVECTOR lowering only supported for MVE\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 9097, __extension__ __PRETTY_FUNCTION__)); | ||||
9098 | |||||
9099 | SDValue NewV1 = PromoteMVEPredVector(dl, V1, Op1VT, DAG); | ||||
9100 | |||||
9101 | // We now have Op1 promoted to a vector of integers, where v8i1 gets | ||||
9102 | // promoted to v8i16, etc. | ||||
9103 | |||||
9104 | MVT ElType = getVectorTyFromPredicateVector(VT).getScalarType().getSimpleVT(); | ||||
9105 | |||||
9106 | if (NumElts == 2) { | ||||
9107 | EVT SubVT = MVT::v4i32; | ||||
9108 | SDValue SubVec = DAG.getNode(ISD::UNDEF, dl, SubVT); | ||||
9109 | for (unsigned i = Index, j = 0; i < (Index + NumElts); i++, j += 2) { | ||||
9110 | SDValue Elt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32, NewV1, | ||||
9111 | DAG.getIntPtrConstant(i, dl)); | ||||
9112 | SubVec = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, SubVT, SubVec, Elt, | ||||
9113 | DAG.getConstant(j, dl, MVT::i32)); | ||||
9114 | SubVec = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, SubVT, SubVec, Elt, | ||||
9115 | DAG.getConstant(j + 1, dl, MVT::i32)); | ||||
9116 | } | ||||
9117 | SDValue Cmp = DAG.getNode(ARMISD::VCMPZ, dl, MVT::v4i1, SubVec, | ||||
9118 | DAG.getConstant(ARMCC::NE, dl, MVT::i32)); | ||||
9119 | return DAG.getNode(ARMISD::PREDICATE_CAST, dl, MVT::v2i1, Cmp); | ||||
9120 | } | ||||
9121 | |||||
9122 | EVT SubVT = MVT::getVectorVT(ElType, NumElts); | ||||
9123 | SDValue SubVec = DAG.getNode(ISD::UNDEF, dl, SubVT); | ||||
9124 | for (unsigned i = Index, j = 0; i < (Index + NumElts); i++, j++) { | ||||
9125 | SDValue Elt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32, NewV1, | ||||
9126 | DAG.getIntPtrConstant(i, dl)); | ||||
9127 | SubVec = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, SubVT, SubVec, Elt, | ||||
9128 | DAG.getConstant(j, dl, MVT::i32)); | ||||
9129 | } | ||||
9130 | |||||
9131 | // Now return the result of comparing the subvector with zero, | ||||
9132 | // which will generate a real predicate, i.e. v4i1, v8i1 or v16i1. | ||||
9133 | return DAG.getNode(ARMISD::VCMPZ, dl, VT, SubVec, | ||||
9134 | DAG.getConstant(ARMCC::NE, dl, MVT::i32)); | ||||
9135 | } | ||||
9136 | |||||
9137 | // Turn a truncate into a predicate (an i1 vector) into icmp(and(x, 1), 0). | ||||
9138 | static SDValue LowerTruncatei1(SDNode *N, SelectionDAG &DAG, | ||||
9139 | const ARMSubtarget *ST) { | ||||
9140 | assert(ST->hasMVEIntegerOps() && "Expected MVE!")(static_cast <bool> (ST->hasMVEIntegerOps() && "Expected MVE!") ? void (0) : __assert_fail ("ST->hasMVEIntegerOps() && \"Expected MVE!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 9140, __extension__ __PRETTY_FUNCTION__)); | ||||
9141 | EVT VT = N->getValueType(0); | ||||
9142 | assert((VT == MVT::v16i1 || VT == MVT::v8i1 || VT == MVT::v4i1) &&(static_cast <bool> ((VT == MVT::v16i1 || VT == MVT::v8i1 || VT == MVT::v4i1) && "Expected a vector i1 type!") ? void (0) : __assert_fail ("(VT == MVT::v16i1 || VT == MVT::v8i1 || VT == MVT::v4i1) && \"Expected a vector i1 type!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 9143, __extension__ __PRETTY_FUNCTION__)) | ||||
9143 | "Expected a vector i1 type!")(static_cast <bool> ((VT == MVT::v16i1 || VT == MVT::v8i1 || VT == MVT::v4i1) && "Expected a vector i1 type!") ? void (0) : __assert_fail ("(VT == MVT::v16i1 || VT == MVT::v8i1 || VT == MVT::v4i1) && \"Expected a vector i1 type!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 9143, __extension__ __PRETTY_FUNCTION__)); | ||||
9144 | SDValue Op = N->getOperand(0); | ||||
9145 | EVT FromVT = Op.getValueType(); | ||||
9146 | SDLoc DL(N); | ||||
9147 | |||||
9148 | SDValue And = | ||||
9149 | DAG.getNode(ISD::AND, DL, FromVT, Op, DAG.getConstant(1, DL, FromVT)); | ||||
9150 | return DAG.getNode(ISD::SETCC, DL, VT, And, DAG.getConstant(0, DL, FromVT), | ||||
9151 | DAG.getCondCode(ISD::SETNE)); | ||||
9152 | } | ||||
9153 | |||||
9154 | static SDValue LowerTruncate(SDNode *N, SelectionDAG &DAG, | ||||
9155 | const ARMSubtarget *Subtarget) { | ||||
9156 | if (!Subtarget->hasMVEIntegerOps()) | ||||
9157 | return SDValue(); | ||||
9158 | |||||
9159 | EVT ToVT = N->getValueType(0); | ||||
9160 | if (ToVT.getScalarType() == MVT::i1) | ||||
9161 | return LowerTruncatei1(N, DAG, Subtarget); | ||||
9162 | |||||
9163 | // MVE does not have a single instruction to perform the truncation of a v4i32 | ||||
9164 | // into the lower half of a v8i16, in the same way that a NEON vmovn would. | ||||
9165 | // Most of the instructions in MVE follow the 'Beats' system, where moving | ||||
9166 | // values from different lanes is usually something that the instructions | ||||
9167 | // avoid. | ||||
9168 | // | ||||
9169 | // Instead it has top/bottom instructions such as VMOVLT/B and VMOVNT/B, | ||||
9170 | // which take a the top/bottom half of a larger lane and extend it (or do the | ||||
9171 | // opposite, truncating into the top/bottom lane from a larger lane). Note | ||||
9172 | // that because of the way we widen lanes, a v4i16 is really a v4i32 using the | ||||
9173 | // bottom 16bits from each vector lane. This works really well with T/B | ||||
9174 | // instructions, but that doesn't extend to v8i32->v8i16 where the lanes need | ||||
9175 | // to move order. | ||||
9176 | // | ||||
9177 | // But truncates and sext/zext are always going to be fairly common from llvm. | ||||
9178 | // We have several options for how to deal with them: | ||||
9179 | // - Wherever possible combine them into an instruction that makes them | ||||
9180 | // "free". This includes loads/stores, which can perform the trunc as part | ||||
9181 | // of the memory operation. Or certain shuffles that can be turned into | ||||
9182 | // VMOVN/VMOVL. | ||||
9183 | // - Lane Interleaving to transform blocks surrounded by ext/trunc. So | ||||
9184 | // trunc(mul(sext(a), sext(b))) may become | ||||
9185 | // VMOVNT(VMUL(VMOVLB(a), VMOVLB(b)), VMUL(VMOVLT(a), VMOVLT(b))). (Which in | ||||
9186 | // this case can use VMULL). This is performed in the | ||||
9187 | // MVELaneInterleavingPass. | ||||
9188 | // - Otherwise we have an option. By default we would expand the | ||||
9189 | // zext/sext/trunc into a series of lane extract/inserts going via GPR | ||||
9190 | // registers. One for each vector lane in the vector. This can obviously be | ||||
9191 | // very expensive. | ||||
9192 | // - The other option is to use the fact that loads/store can extend/truncate | ||||
9193 | // to turn a trunc into two truncating stack stores and a stack reload. This | ||||
9194 | // becomes 3 back-to-back memory operations, but at least that is less than | ||||
9195 | // all the insert/extracts. | ||||
9196 | // | ||||
9197 | // In order to do the last, we convert certain trunc's into MVETRUNC, which | ||||
9198 | // are either optimized where they can be, or eventually lowered into stack | ||||
9199 | // stores/loads. This prevents us from splitting a v8i16 trunc into two stores | ||||
9200 | // two early, where other instructions would be better, and stops us from | ||||
9201 | // having to reconstruct multiple buildvector shuffles into loads/stores. | ||||
9202 | if (ToVT != MVT::v8i16 && ToVT != MVT::v16i8) | ||||
9203 | return SDValue(); | ||||
9204 | EVT FromVT = N->getOperand(0).getValueType(); | ||||
9205 | if (FromVT != MVT::v8i32 && FromVT != MVT::v16i16) | ||||
9206 | return SDValue(); | ||||
9207 | |||||
9208 | SDValue Lo, Hi; | ||||
9209 | std::tie(Lo, Hi) = DAG.SplitVectorOperand(N, 0); | ||||
9210 | SDLoc DL(N); | ||||
9211 | return DAG.getNode(ARMISD::MVETRUNC, DL, ToVT, Lo, Hi); | ||||
9212 | } | ||||
9213 | |||||
9214 | static SDValue LowerVectorExtend(SDNode *N, SelectionDAG &DAG, | ||||
9215 | const ARMSubtarget *Subtarget) { | ||||
9216 | if (!Subtarget->hasMVEIntegerOps()) | ||||
9217 | return SDValue(); | ||||
9218 | |||||
9219 | // See LowerTruncate above for an explanation of MVEEXT/MVETRUNC. | ||||
9220 | |||||
9221 | EVT ToVT = N->getValueType(0); | ||||
9222 | if (ToVT != MVT::v16i32 && ToVT != MVT::v8i32 && ToVT != MVT::v16i16) | ||||
9223 | return SDValue(); | ||||
9224 | SDValue Op = N->getOperand(0); | ||||
9225 | EVT FromVT = Op.getValueType(); | ||||
9226 | if (FromVT != MVT::v8i16 && FromVT != MVT::v16i8) | ||||
9227 | return SDValue(); | ||||
9228 | |||||
9229 | SDLoc DL(N); | ||||
9230 | EVT ExtVT = ToVT.getHalfNumVectorElementsVT(*DAG.getContext()); | ||||
9231 | if (ToVT.getScalarType() == MVT::i32 && FromVT.getScalarType() == MVT::i8) | ||||
9232 | ExtVT = MVT::v8i16; | ||||
9233 | |||||
9234 | unsigned Opcode = | ||||
9235 | N->getOpcode() == ISD::SIGN_EXTEND ? ARMISD::MVESEXT : ARMISD::MVEZEXT; | ||||
9236 | SDValue Ext = DAG.getNode(Opcode, DL, DAG.getVTList(ExtVT, ExtVT), Op); | ||||
9237 | SDValue Ext1 = Ext.getValue(1); | ||||
9238 | |||||
9239 | if (ToVT.getScalarType() == MVT::i32 && FromVT.getScalarType() == MVT::i8) { | ||||
9240 | Ext = DAG.getNode(N->getOpcode(), DL, MVT::v8i32, Ext); | ||||
9241 | Ext1 = DAG.getNode(N->getOpcode(), DL, MVT::v8i32, Ext1); | ||||
9242 | } | ||||
9243 | |||||
9244 | return DAG.getNode(ISD::CONCAT_VECTORS, DL, ToVT, Ext, Ext1); | ||||
9245 | } | ||||
9246 | |||||
9247 | /// isExtendedBUILD_VECTOR - Check if N is a constant BUILD_VECTOR where each | ||||
9248 | /// element has been zero/sign-extended, depending on the isSigned parameter, | ||||
9249 | /// from an integer type half its size. | ||||
9250 | static bool isExtendedBUILD_VECTOR(SDNode *N, SelectionDAG &DAG, | ||||
9251 | bool isSigned) { | ||||
9252 | // A v2i64 BUILD_VECTOR will have been legalized to a BITCAST from v4i32. | ||||
9253 | EVT VT = N->getValueType(0); | ||||
9254 | if (VT == MVT::v2i64 && N->getOpcode() == ISD::BITCAST) { | ||||
9255 | SDNode *BVN = N->getOperand(0).getNode(); | ||||
9256 | if (BVN->getValueType(0) != MVT::v4i32 || | ||||
9257 | BVN->getOpcode() != ISD::BUILD_VECTOR) | ||||
9258 | return false; | ||||
9259 | unsigned LoElt = DAG.getDataLayout().isBigEndian() ? 1 : 0; | ||||
9260 | unsigned HiElt = 1 - LoElt; | ||||
9261 | ConstantSDNode *Lo0 = dyn_cast<ConstantSDNode>(BVN->getOperand(LoElt)); | ||||
9262 | ConstantSDNode *Hi0 = dyn_cast<ConstantSDNode>(BVN->getOperand(HiElt)); | ||||
9263 | ConstantSDNode *Lo1 = dyn_cast<ConstantSDNode>(BVN->getOperand(LoElt+2)); | ||||
9264 | ConstantSDNode *Hi1 = dyn_cast<ConstantSDNode>(BVN->getOperand(HiElt+2)); | ||||
9265 | if (!Lo0 || !Hi0 || !Lo1 || !Hi1) | ||||
9266 | return false; | ||||
9267 | if (isSigned) { | ||||
9268 | if (Hi0->getSExtValue() == Lo0->getSExtValue() >> 32 && | ||||
9269 | Hi1->getSExtValue() == Lo1->getSExtValue() >> 32) | ||||
9270 | return true; | ||||
9271 | } else { | ||||
9272 | if (Hi0->isZero() && Hi1->isZero()) | ||||
9273 | return true; | ||||
9274 | } | ||||
9275 | return false; | ||||
9276 | } | ||||
9277 | |||||
9278 | if (N->getOpcode() != ISD::BUILD_VECTOR) | ||||
9279 | return false; | ||||
9280 | |||||
9281 | for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) { | ||||
9282 | SDNode *Elt = N->getOperand(i).getNode(); | ||||
9283 | if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Elt)) { | ||||
9284 | unsigned EltSize = VT.getScalarSizeInBits(); | ||||
9285 | unsigned HalfSize = EltSize / 2; | ||||
9286 | if (isSigned) { | ||||
9287 | if (!isIntN(HalfSize, C->getSExtValue())) | ||||
9288 | return false; | ||||
9289 | } else { | ||||
9290 | if (!isUIntN(HalfSize, C->getZExtValue())) | ||||
9291 | return false; | ||||
9292 | } | ||||
9293 | continue; | ||||
9294 | } | ||||
9295 | return false; | ||||
9296 | } | ||||
9297 | |||||
9298 | return true; | ||||
9299 | } | ||||
9300 | |||||
9301 | /// isSignExtended - Check if a node is a vector value that is sign-extended | ||||
9302 | /// or a constant BUILD_VECTOR with sign-extended elements. | ||||
9303 | static bool isSignExtended(SDNode *N, SelectionDAG &DAG) { | ||||
9304 | if (N->getOpcode() == ISD::SIGN_EXTEND || ISD::isSEXTLoad(N)) | ||||
9305 | return true; | ||||
9306 | if (isExtendedBUILD_VECTOR(N, DAG, true)) | ||||
9307 | return true; | ||||
9308 | return false; | ||||
9309 | } | ||||
9310 | |||||
9311 | /// isZeroExtended - Check if a node is a vector value that is zero-extended (or | ||||
9312 | /// any-extended) or a constant BUILD_VECTOR with zero-extended elements. | ||||
9313 | static bool isZeroExtended(SDNode *N, SelectionDAG &DAG) { | ||||
9314 | if (N->getOpcode() == ISD::ZERO_EXTEND || N->getOpcode() == ISD::ANY_EXTEND || | ||||
9315 | ISD::isZEXTLoad(N)) | ||||
9316 | return true; | ||||
9317 | if (isExtendedBUILD_VECTOR(N, DAG, false)) | ||||
9318 | return true; | ||||
9319 | return false; | ||||
9320 | } | ||||
9321 | |||||
9322 | static EVT getExtensionTo64Bits(const EVT &OrigVT) { | ||||
9323 | if (OrigVT.getSizeInBits() >= 64) | ||||
9324 | return OrigVT; | ||||
9325 | |||||
9326 | assert(OrigVT.isSimple() && "Expecting a simple value type")(static_cast <bool> (OrigVT.isSimple() && "Expecting a simple value type" ) ? void (0) : __assert_fail ("OrigVT.isSimple() && \"Expecting a simple value type\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 9326, __extension__ __PRETTY_FUNCTION__)); | ||||
9327 | |||||
9328 | MVT::SimpleValueType OrigSimpleTy = OrigVT.getSimpleVT().SimpleTy; | ||||
9329 | switch (OrigSimpleTy) { | ||||
9330 | default: llvm_unreachable("Unexpected Vector Type")::llvm::llvm_unreachable_internal("Unexpected Vector Type", "llvm/lib/Target/ARM/ARMISelLowering.cpp" , 9330); | ||||
9331 | case MVT::v2i8: | ||||
9332 | case MVT::v2i16: | ||||
9333 | return MVT::v2i32; | ||||
9334 | case MVT::v4i8: | ||||
9335 | return MVT::v4i16; | ||||
9336 | } | ||||
9337 | } | ||||
9338 | |||||
9339 | /// AddRequiredExtensionForVMULL - Add a sign/zero extension to extend the total | ||||
9340 | /// value size to 64 bits. We need a 64-bit D register as an operand to VMULL. | ||||
9341 | /// We insert the required extension here to get the vector to fill a D register. | ||||
9342 | static SDValue AddRequiredExtensionForVMULL(SDValue N, SelectionDAG &DAG, | ||||
9343 | const EVT &OrigTy, | ||||
9344 | const EVT &ExtTy, | ||||
9345 | unsigned ExtOpcode) { | ||||
9346 | // The vector originally had a size of OrigTy. It was then extended to ExtTy. | ||||
9347 | // We expect the ExtTy to be 128-bits total. If the OrigTy is less than | ||||
9348 | // 64-bits we need to insert a new extension so that it will be 64-bits. | ||||
9349 | assert(ExtTy.is128BitVector() && "Unexpected extension size")(static_cast <bool> (ExtTy.is128BitVector() && "Unexpected extension size" ) ? void (0) : __assert_fail ("ExtTy.is128BitVector() && \"Unexpected extension size\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 9349, __extension__ __PRETTY_FUNCTION__)); | ||||
9350 | if (OrigTy.getSizeInBits() >= 64) | ||||
9351 | return N; | ||||
9352 | |||||
9353 | // Must extend size to at least 64 bits to be used as an operand for VMULL. | ||||
9354 | EVT NewVT = getExtensionTo64Bits(OrigTy); | ||||
9355 | |||||
9356 | return DAG.getNode(ExtOpcode, SDLoc(N), NewVT, N); | ||||
9357 | } | ||||
9358 | |||||
9359 | /// SkipLoadExtensionForVMULL - return a load of the original vector size that | ||||
9360 | /// does not do any sign/zero extension. If the original vector is less | ||||
9361 | /// than 64 bits, an appropriate extension will be added after the load to | ||||
9362 | /// reach a total size of 64 bits. We have to add the extension separately | ||||
9363 | /// because ARM does not have a sign/zero extending load for vectors. | ||||
9364 | static SDValue SkipLoadExtensionForVMULL(LoadSDNode *LD, SelectionDAG& DAG) { | ||||
9365 | EVT ExtendedTy = getExtensionTo64Bits(LD->getMemoryVT()); | ||||
9366 | |||||
9367 | // The load already has the right type. | ||||
9368 | if (ExtendedTy == LD->getMemoryVT()) | ||||
9369 | return DAG.getLoad(LD->getMemoryVT(), SDLoc(LD), LD->getChain(), | ||||
9370 | LD->getBasePtr(), LD->getPointerInfo(), | ||||
9371 | LD->getAlignment(), LD->getMemOperand()->getFlags()); | ||||
9372 | |||||
9373 | // We need to create a zextload/sextload. We cannot just create a load | ||||
9374 | // followed by a zext/zext node because LowerMUL is also run during normal | ||||
9375 | // operation legalization where we can't create illegal types. | ||||
9376 | return DAG.getExtLoad(LD->getExtensionType(), SDLoc(LD), ExtendedTy, | ||||
9377 | LD->getChain(), LD->getBasePtr(), LD->getPointerInfo(), | ||||
9378 | LD->getMemoryVT(), LD->getAlignment(), | ||||
9379 | LD->getMemOperand()->getFlags()); | ||||
9380 | } | ||||
9381 | |||||
9382 | /// SkipExtensionForVMULL - For a node that is a SIGN_EXTEND, ZERO_EXTEND, | ||||
9383 | /// ANY_EXTEND, extending load, or BUILD_VECTOR with extended elements, return | ||||
9384 | /// the unextended value. The unextended vector should be 64 bits so that it can | ||||
9385 | /// be used as an operand to a VMULL instruction. If the original vector size | ||||
9386 | /// before extension is less than 64 bits we add a an extension to resize | ||||
9387 | /// the vector to 64 bits. | ||||
9388 | static SDValue SkipExtensionForVMULL(SDNode *N, SelectionDAG &DAG) { | ||||
9389 | if (N->getOpcode() == ISD::SIGN_EXTEND || | ||||
9390 | N->getOpcode() == ISD::ZERO_EXTEND || N->getOpcode() == ISD::ANY_EXTEND) | ||||
9391 | return AddRequiredExtensionForVMULL(N->getOperand(0), DAG, | ||||
9392 | N->getOperand(0)->getValueType(0), | ||||
9393 | N->getValueType(0), | ||||
9394 | N->getOpcode()); | ||||
9395 | |||||
9396 | if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) { | ||||
9397 | assert((ISD::isSEXTLoad(LD) || ISD::isZEXTLoad(LD)) &&(static_cast <bool> ((ISD::isSEXTLoad(LD) || ISD::isZEXTLoad (LD)) && "Expected extending load") ? void (0) : __assert_fail ("(ISD::isSEXTLoad(LD) || ISD::isZEXTLoad(LD)) && \"Expected extending load\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 9398, __extension__ __PRETTY_FUNCTION__)) | ||||
9398 | "Expected extending load")(static_cast <bool> ((ISD::isSEXTLoad(LD) || ISD::isZEXTLoad (LD)) && "Expected extending load") ? void (0) : __assert_fail ("(ISD::isSEXTLoad(LD) || ISD::isZEXTLoad(LD)) && \"Expected extending load\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 9398, __extension__ __PRETTY_FUNCTION__)); | ||||
9399 | |||||
9400 | SDValue newLoad = SkipLoadExtensionForVMULL(LD, DAG); | ||||
9401 | DAG.ReplaceAllUsesOfValueWith(SDValue(LD, 1), newLoad.getValue(1)); | ||||
9402 | unsigned Opcode = ISD::isSEXTLoad(LD) ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND; | ||||
9403 | SDValue extLoad = | ||||
9404 | DAG.getNode(Opcode, SDLoc(newLoad), LD->getValueType(0), newLoad); | ||||
9405 | DAG.ReplaceAllUsesOfValueWith(SDValue(LD, 0), extLoad); | ||||
9406 | |||||
9407 | return newLoad; | ||||
9408 | } | ||||
9409 | |||||
9410 | // Otherwise, the value must be a BUILD_VECTOR. For v2i64, it will | ||||
9411 | // have been legalized as a BITCAST from v4i32. | ||||
9412 | if (N->getOpcode() == ISD::BITCAST) { | ||||
9413 | SDNode *BVN = N->getOperand(0).getNode(); | ||||
9414 | assert(BVN->getOpcode() == ISD::BUILD_VECTOR &&(static_cast <bool> (BVN->getOpcode() == ISD::BUILD_VECTOR && BVN->getValueType(0) == MVT::v4i32 && "expected v4i32 BUILD_VECTOR" ) ? void (0) : __assert_fail ("BVN->getOpcode() == ISD::BUILD_VECTOR && BVN->getValueType(0) == MVT::v4i32 && \"expected v4i32 BUILD_VECTOR\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 9415, __extension__ __PRETTY_FUNCTION__)) | ||||
9415 | BVN->getValueType(0) == MVT::v4i32 && "expected v4i32 BUILD_VECTOR")(static_cast <bool> (BVN->getOpcode() == ISD::BUILD_VECTOR && BVN->getValueType(0) == MVT::v4i32 && "expected v4i32 BUILD_VECTOR" ) ? void (0) : __assert_fail ("BVN->getOpcode() == ISD::BUILD_VECTOR && BVN->getValueType(0) == MVT::v4i32 && \"expected v4i32 BUILD_VECTOR\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 9415, __extension__ __PRETTY_FUNCTION__)); | ||||
9416 | unsigned LowElt = DAG.getDataLayout().isBigEndian() ? 1 : 0; | ||||
9417 | return DAG.getBuildVector( | ||||
9418 | MVT::v2i32, SDLoc(N), | ||||
9419 | {BVN->getOperand(LowElt), BVN->getOperand(LowElt + 2)}); | ||||
9420 | } | ||||
9421 | // Construct a new BUILD_VECTOR with elements truncated to half the size. | ||||
9422 | assert(N->getOpcode() == ISD::BUILD_VECTOR && "expected BUILD_VECTOR")(static_cast <bool> (N->getOpcode() == ISD::BUILD_VECTOR && "expected BUILD_VECTOR") ? void (0) : __assert_fail ("N->getOpcode() == ISD::BUILD_VECTOR && \"expected BUILD_VECTOR\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 9422, __extension__ __PRETTY_FUNCTION__)); | ||||
9423 | EVT VT = N->getValueType(0); | ||||
9424 | unsigned EltSize = VT.getScalarSizeInBits() / 2; | ||||
9425 | unsigned NumElts = VT.getVectorNumElements(); | ||||
9426 | MVT TruncVT = MVT::getIntegerVT(EltSize); | ||||
9427 | SmallVector<SDValue, 8> Ops; | ||||
9428 | SDLoc dl(N); | ||||
9429 | for (unsigned i = 0; i != NumElts; ++i) { | ||||
9430 | ConstantSDNode *C = cast<ConstantSDNode>(N->getOperand(i)); | ||||
9431 | const APInt &CInt = C->getAPIntValue(); | ||||
9432 | // Element types smaller than 32 bits are not legal, so use i32 elements. | ||||
9433 | // The values are implicitly truncated so sext vs. zext doesn't matter. | ||||
9434 | Ops.push_back(DAG.getConstant(CInt.zextOrTrunc(32), dl, MVT::i32)); | ||||
9435 | } | ||||
9436 | return DAG.getBuildVector(MVT::getVectorVT(TruncVT, NumElts), dl, Ops); | ||||
9437 | } | ||||
9438 | |||||
9439 | static bool isAddSubSExt(SDNode *N, SelectionDAG &DAG) { | ||||
9440 | unsigned Opcode = N->getOpcode(); | ||||
9441 | if (Opcode == ISD::ADD || Opcode == ISD::SUB) { | ||||
9442 | SDNode *N0 = N->getOperand(0).getNode(); | ||||
9443 | SDNode *N1 = N->getOperand(1).getNode(); | ||||
9444 | return N0->hasOneUse() && N1->hasOneUse() && | ||||
9445 | isSignExtended(N0, DAG) && isSignExtended(N1, DAG); | ||||
9446 | } | ||||
9447 | return false; | ||||
9448 | } | ||||
9449 | |||||
9450 | static bool isAddSubZExt(SDNode *N, SelectionDAG &DAG) { | ||||
9451 | unsigned Opcode = N->getOpcode(); | ||||
9452 | if (Opcode == ISD::ADD || Opcode == ISD::SUB) { | ||||
9453 | SDNode *N0 = N->getOperand(0).getNode(); | ||||
9454 | SDNode *N1 = N->getOperand(1).getNode(); | ||||
9455 | return N0->hasOneUse() && N1->hasOneUse() && | ||||
9456 | isZeroExtended(N0, DAG) && isZeroExtended(N1, DAG); | ||||
9457 | } | ||||
9458 | return false; | ||||
9459 | } | ||||
9460 | |||||
9461 | static SDValue LowerMUL(SDValue Op, SelectionDAG &DAG) { | ||||
9462 | // Multiplications are only custom-lowered for 128-bit vectors so that | ||||
9463 | // VMULL can be detected. Otherwise v2i64 multiplications are not legal. | ||||
9464 | EVT VT = Op.getValueType(); | ||||
9465 | assert(VT.is128BitVector() && VT.isInteger() &&(static_cast <bool> (VT.is128BitVector() && VT. isInteger() && "unexpected type for custom-lowering ISD::MUL" ) ? void (0) : __assert_fail ("VT.is128BitVector() && VT.isInteger() && \"unexpected type for custom-lowering ISD::MUL\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 9466, __extension__ __PRETTY_FUNCTION__)) | ||||
9466 | "unexpected type for custom-lowering ISD::MUL")(static_cast <bool> (VT.is128BitVector() && VT. isInteger() && "unexpected type for custom-lowering ISD::MUL" ) ? void (0) : __assert_fail ("VT.is128BitVector() && VT.isInteger() && \"unexpected type for custom-lowering ISD::MUL\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 9466, __extension__ __PRETTY_FUNCTION__)); | ||||
9467 | SDNode *N0 = Op.getOperand(0).getNode(); | ||||
9468 | SDNode *N1 = Op.getOperand(1).getNode(); | ||||
9469 | unsigned NewOpc = 0; | ||||
9470 | bool isMLA = false; | ||||
9471 | bool isN0SExt = isSignExtended(N0, DAG); | ||||
9472 | bool isN1SExt = isSignExtended(N1, DAG); | ||||
9473 | if (isN0SExt && isN1SExt) | ||||
9474 | NewOpc = ARMISD::VMULLs; | ||||
9475 | else { | ||||
9476 | bool isN0ZExt = isZeroExtended(N0, DAG); | ||||
9477 | bool isN1ZExt = isZeroExtended(N1, DAG); | ||||
9478 | if (isN0ZExt && isN1ZExt) | ||||
9479 | NewOpc = ARMISD::VMULLu; | ||||
9480 | else if (isN1SExt || isN1ZExt) { | ||||
9481 | // Look for (s/zext A + s/zext B) * (s/zext C). We want to turn these | ||||
9482 | // into (s/zext A * s/zext C) + (s/zext B * s/zext C) | ||||
9483 | if (isN1SExt && isAddSubSExt(N0, DAG)) { | ||||
9484 | NewOpc = ARMISD::VMULLs; | ||||
9485 | isMLA = true; | ||||
9486 | } else if (isN1ZExt && isAddSubZExt(N0, DAG)) { | ||||
9487 | NewOpc = ARMISD::VMULLu; | ||||
9488 | isMLA = true; | ||||
9489 | } else if (isN0ZExt && isAddSubZExt(N1, DAG)) { | ||||
9490 | std::swap(N0, N1); | ||||
9491 | NewOpc = ARMISD::VMULLu; | ||||
9492 | isMLA = true; | ||||
9493 | } | ||||
9494 | } | ||||
9495 | |||||
9496 | if (!NewOpc) { | ||||
9497 | if (VT == MVT::v2i64) | ||||
9498 | // Fall through to expand this. It is not legal. | ||||
9499 | return SDValue(); | ||||
9500 | else | ||||
9501 | // Other vector multiplications are legal. | ||||
9502 | return Op; | ||||
9503 | } | ||||
9504 | } | ||||
9505 | |||||
9506 | // Legalize to a VMULL instruction. | ||||
9507 | SDLoc DL(Op); | ||||
9508 | SDValue Op0; | ||||
9509 | SDValue Op1 = SkipExtensionForVMULL(N1, DAG); | ||||
9510 | if (!isMLA) { | ||||
9511 | Op0 = SkipExtensionForVMULL(N0, DAG); | ||||
9512 | assert(Op0.getValueType().is64BitVector() &&(static_cast <bool> (Op0.getValueType().is64BitVector() && Op1.getValueType().is64BitVector() && "unexpected types for extended operands to VMULL" ) ? void (0) : __assert_fail ("Op0.getValueType().is64BitVector() && Op1.getValueType().is64BitVector() && \"unexpected types for extended operands to VMULL\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 9514, __extension__ __PRETTY_FUNCTION__)) | ||||
9513 | Op1.getValueType().is64BitVector() &&(static_cast <bool> (Op0.getValueType().is64BitVector() && Op1.getValueType().is64BitVector() && "unexpected types for extended operands to VMULL" ) ? void (0) : __assert_fail ("Op0.getValueType().is64BitVector() && Op1.getValueType().is64BitVector() && \"unexpected types for extended operands to VMULL\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 9514, __extension__ __PRETTY_FUNCTION__)) | ||||
9514 | "unexpected types for extended operands to VMULL")(static_cast <bool> (Op0.getValueType().is64BitVector() && Op1.getValueType().is64BitVector() && "unexpected types for extended operands to VMULL" ) ? void (0) : __assert_fail ("Op0.getValueType().is64BitVector() && Op1.getValueType().is64BitVector() && \"unexpected types for extended operands to VMULL\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 9514, __extension__ __PRETTY_FUNCTION__)); | ||||
9515 | return DAG.getNode(NewOpc, DL, VT, Op0, Op1); | ||||
9516 | } | ||||
9517 | |||||
9518 | // Optimizing (zext A + zext B) * C, to (VMULL A, C) + (VMULL B, C) during | ||||
9519 | // isel lowering to take advantage of no-stall back to back vmul + vmla. | ||||
9520 | // vmull q0, d4, d6 | ||||
9521 | // vmlal q0, d5, d6 | ||||
9522 | // is faster than | ||||
9523 | // vaddl q0, d4, d5 | ||||
9524 | // vmovl q1, d6 | ||||
9525 | // vmul q0, q0, q1 | ||||
9526 | SDValue N00 = SkipExtensionForVMULL(N0->getOperand(0).getNode(), DAG); | ||||
9527 | SDValue N01 = SkipExtensionForVMULL(N0->getOperand(1).getNode(), DAG); | ||||
9528 | EVT Op1VT = Op1.getValueType(); | ||||
9529 | return DAG.getNode(N0->getOpcode(), DL, VT, | ||||
9530 | DAG.getNode(NewOpc, DL, VT, | ||||
9531 | DAG.getNode(ISD::BITCAST, DL, Op1VT, N00), Op1), | ||||
9532 | DAG.getNode(NewOpc, DL, VT, | ||||
9533 | DAG.getNode(ISD::BITCAST, DL, Op1VT, N01), Op1)); | ||||
9534 | } | ||||
9535 | |||||
9536 | static SDValue LowerSDIV_v4i8(SDValue X, SDValue Y, const SDLoc &dl, | ||||
9537 | SelectionDAG &DAG) { | ||||
9538 | // TODO: Should this propagate fast-math-flags? | ||||
9539 | |||||
9540 | // Convert to float | ||||
9541 | // float4 xf = vcvt_f32_s32(vmovl_s16(a.lo)); | ||||
9542 | // float4 yf = vcvt_f32_s32(vmovl_s16(b.lo)); | ||||
9543 | X = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v4i32, X); | ||||
9544 | Y = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v4i32, Y); | ||||
9545 | X = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, X); | ||||
9546 | Y = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, Y); | ||||
9547 | // Get reciprocal estimate. | ||||
9548 | // float4 recip = vrecpeq_f32(yf); | ||||
9549 | Y = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32, | ||||
9550 | DAG.getConstant(Intrinsic::arm_neon_vrecpe, dl, MVT::i32), | ||||
9551 | Y); | ||||
9552 | // Because char has a smaller range than uchar, we can actually get away | ||||
9553 | // without any newton steps. This requires that we use a weird bias | ||||
9554 | // of 0xb000, however (again, this has been exhaustively tested). | ||||
9555 | // float4 result = as_float4(as_int4(xf*recip) + 0xb000); | ||||
9556 | X = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, X, Y); | ||||
9557 | X = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, X); | ||||
9558 | Y = DAG.getConstant(0xb000, dl, MVT::v4i32); | ||||
9559 | X = DAG.getNode(ISD::ADD, dl, MVT::v4i32, X, Y); | ||||
9560 | X = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, X); | ||||
9561 | // Convert back to short. | ||||
9562 | X = DAG.getNode(ISD::FP_TO_SINT, dl, MVT::v4i32, X); | ||||
9563 | X = DAG.getNode(ISD::TRUNCATE, dl, MVT::v4i16, X); | ||||
9564 | return X; | ||||
9565 | } | ||||
9566 | |||||
9567 | static SDValue LowerSDIV_v4i16(SDValue N0, SDValue N1, const SDLoc &dl, | ||||
9568 | SelectionDAG &DAG) { | ||||
9569 | // TODO: Should this propagate fast-math-flags? | ||||
9570 | |||||
9571 | SDValue N2; | ||||
9572 | // Convert to float. | ||||
9573 | // float4 yf = vcvt_f32_s32(vmovl_s16(y)); | ||||
9574 | // float4 xf = vcvt_f32_s32(vmovl_s16(x)); | ||||
9575 | N0 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v4i32, N0); | ||||
9576 | N1 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v4i32, N1); | ||||
9577 | N0 = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, N0); | ||||
9578 | N1 = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, N1); | ||||
9579 | |||||
9580 | // Use reciprocal estimate and one refinement step. | ||||
9581 | // float4 recip = vrecpeq_f32(yf); | ||||
9582 | // recip *= vrecpsq_f32(yf, recip); | ||||
9583 | N2 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32, | ||||
9584 | DAG.getConstant(Intrinsic::arm_neon_vrecpe, dl, MVT::i32), | ||||
9585 | N1); | ||||
9586 | N1 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32, | ||||
9587 | DAG.getConstant(Intrinsic::arm_neon_vrecps, dl, MVT::i32), | ||||
9588 | N1, N2); | ||||
9589 | N2 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N1, N2); | ||||
9590 | // Because short has a smaller range than ushort, we can actually get away | ||||
9591 | // with only a single newton step. This requires that we use a weird bias | ||||
9592 | // of 89, however (again, this has been exhaustively tested). | ||||
9593 | // float4 result = as_float4(as_int4(xf*recip) + 0x89); | ||||
9594 | N0 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N0, N2); | ||||
9595 | N0 = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, N0); | ||||
9596 | N1 = DAG.getConstant(0x89, dl, MVT::v4i32); | ||||
9597 | N0 = DAG.getNode(ISD::ADD, dl, MVT::v4i32, N0, N1); | ||||
9598 | N0 = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, N0); | ||||
9599 | // Convert back to integer and return. | ||||
9600 | // return vmovn_s32(vcvt_s32_f32(result)); | ||||
9601 | N0 = DAG.getNode(ISD::FP_TO_SINT, dl, MVT::v4i32, N0); | ||||
9602 | N0 = DAG.getNode(ISD::TRUNCATE, dl, MVT::v4i16, N0); | ||||
9603 | return N0; | ||||
9604 | } | ||||
9605 | |||||
9606 | static SDValue LowerSDIV(SDValue Op, SelectionDAG &DAG, | ||||
9607 | const ARMSubtarget *ST) { | ||||
9608 | EVT VT = Op.getValueType(); | ||||
9609 | assert((VT == MVT::v4i16 || VT == MVT::v8i8) &&(static_cast <bool> ((VT == MVT::v4i16 || VT == MVT::v8i8 ) && "unexpected type for custom-lowering ISD::SDIV") ? void (0) : __assert_fail ("(VT == MVT::v4i16 || VT == MVT::v8i8) && \"unexpected type for custom-lowering ISD::SDIV\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 9610, __extension__ __PRETTY_FUNCTION__)) | ||||
9610 | "unexpected type for custom-lowering ISD::SDIV")(static_cast <bool> ((VT == MVT::v4i16 || VT == MVT::v8i8 ) && "unexpected type for custom-lowering ISD::SDIV") ? void (0) : __assert_fail ("(VT == MVT::v4i16 || VT == MVT::v8i8) && \"unexpected type for custom-lowering ISD::SDIV\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 9610, __extension__ __PRETTY_FUNCTION__)); | ||||
9611 | |||||
9612 | SDLoc dl(Op); | ||||
9613 | SDValue N0 = Op.getOperand(0); | ||||
9614 | SDValue N1 = Op.getOperand(1); | ||||
9615 | SDValue N2, N3; | ||||
9616 | |||||
9617 | if (VT == MVT::v8i8) { | ||||
9618 | N0 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v8i16, N0); | ||||
9619 | N1 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v8i16, N1); | ||||
9620 | |||||
9621 | N2 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N0, | ||||
9622 | DAG.getIntPtrConstant(4, dl)); | ||||
9623 | N3 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N1, | ||||
9624 | DAG.getIntPtrConstant(4, dl)); | ||||
9625 | N0 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N0, | ||||
9626 | DAG.getIntPtrConstant(0, dl)); | ||||
9627 | N1 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N1, | ||||
9628 | DAG.getIntPtrConstant(0, dl)); | ||||
9629 | |||||
9630 | N0 = LowerSDIV_v4i8(N0, N1, dl, DAG); // v4i16 | ||||
9631 | N2 = LowerSDIV_v4i8(N2, N3, dl, DAG); // v4i16 | ||||
9632 | |||||
9633 | N0 = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v8i16, N0, N2); | ||||
9634 | N0 = LowerCONCAT_VECTORS(N0, DAG, ST); | ||||
9635 | |||||
9636 | N0 = DAG.getNode(ISD::TRUNCATE, dl, MVT::v8i8, N0); | ||||
9637 | return N0; | ||||
9638 | } | ||||
9639 | return LowerSDIV_v4i16(N0, N1, dl, DAG); | ||||
9640 | } | ||||
9641 | |||||
9642 | static SDValue LowerUDIV(SDValue Op, SelectionDAG &DAG, | ||||
9643 | const ARMSubtarget *ST) { | ||||
9644 | // TODO: Should this propagate fast-math-flags? | ||||
9645 | EVT VT = Op.getValueType(); | ||||
9646 | assert((VT == MVT::v4i16 || VT == MVT::v8i8) &&(static_cast <bool> ((VT == MVT::v4i16 || VT == MVT::v8i8 ) && "unexpected type for custom-lowering ISD::UDIV") ? void (0) : __assert_fail ("(VT == MVT::v4i16 || VT == MVT::v8i8) && \"unexpected type for custom-lowering ISD::UDIV\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 9647, __extension__ __PRETTY_FUNCTION__)) | ||||
9647 | "unexpected type for custom-lowering ISD::UDIV")(static_cast <bool> ((VT == MVT::v4i16 || VT == MVT::v8i8 ) && "unexpected type for custom-lowering ISD::UDIV") ? void (0) : __assert_fail ("(VT == MVT::v4i16 || VT == MVT::v8i8) && \"unexpected type for custom-lowering ISD::UDIV\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 9647, __extension__ __PRETTY_FUNCTION__)); | ||||
9648 | |||||
9649 | SDLoc dl(Op); | ||||
9650 | SDValue N0 = Op.getOperand(0); | ||||
9651 | SDValue N1 = Op.getOperand(1); | ||||
9652 | SDValue N2, N3; | ||||
9653 | |||||
9654 | if (VT == MVT::v8i8) { | ||||
9655 | N0 = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::v8i16, N0); | ||||
9656 | N1 = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::v8i16, N1); | ||||
9657 | |||||
9658 | N2 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N0, | ||||
9659 | DAG.getIntPtrConstant(4, dl)); | ||||
9660 | N3 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N1, | ||||
9661 | DAG.getIntPtrConstant(4, dl)); | ||||
9662 | N0 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N0, | ||||
9663 | DAG.getIntPtrConstant(0, dl)); | ||||
9664 | N1 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N1, | ||||
9665 | DAG.getIntPtrConstant(0, dl)); | ||||
9666 | |||||
9667 | N0 = LowerSDIV_v4i16(N0, N1, dl, DAG); // v4i16 | ||||
9668 | N2 = LowerSDIV_v4i16(N2, N3, dl, DAG); // v4i16 | ||||
9669 | |||||
9670 | N0 = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v8i16, N0, N2); | ||||
9671 | N0 = LowerCONCAT_VECTORS(N0, DAG, ST); | ||||
9672 | |||||
9673 | N0 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v8i8, | ||||
9674 | DAG.getConstant(Intrinsic::arm_neon_vqmovnsu, dl, | ||||
9675 | MVT::i32), | ||||
9676 | N0); | ||||
9677 | return N0; | ||||
9678 | } | ||||
9679 | |||||
9680 | // v4i16 sdiv ... Convert to float. | ||||
9681 | // float4 yf = vcvt_f32_s32(vmovl_u16(y)); | ||||
9682 | // float4 xf = vcvt_f32_s32(vmovl_u16(x)); | ||||
9683 | N0 = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::v4i32, N0); | ||||
9684 | N1 = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::v4i32, N1); | ||||
9685 | N0 = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, N0); | ||||
9686 | SDValue BN1 = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, N1); | ||||
9687 | |||||
9688 | // Use reciprocal estimate and two refinement steps. | ||||
9689 | // float4 recip = vrecpeq_f32(yf); | ||||
9690 | // recip *= vrecpsq_f32(yf, recip); | ||||
9691 | // recip *= vrecpsq_f32(yf, recip); | ||||
9692 | N2 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32, | ||||
9693 | DAG.getConstant(Intrinsic::arm_neon_vrecpe, dl, MVT::i32), | ||||
9694 | BN1); | ||||
9695 | N1 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32, | ||||
9696 | DAG.getConstant(Intrinsic::arm_neon_vrecps, dl, MVT::i32), | ||||
9697 | BN1, N2); | ||||
9698 | N2 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N1, N2); | ||||
9699 | N1 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32, | ||||
9700 | DAG.getConstant(Intrinsic::arm_neon_vrecps, dl, MVT::i32), | ||||
9701 | BN1, N2); | ||||
9702 | N2 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N1, N2); | ||||
9703 | // Simply multiplying by the reciprocal estimate can leave us a few ulps | ||||
9704 | // too low, so we add 2 ulps (exhaustive testing shows that this is enough, | ||||
9705 | // and that it will never cause us to return an answer too large). | ||||
9706 | // float4 result = as_float4(as_int4(xf*recip) + 2); | ||||
9707 | N0 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N0, N2); | ||||
9708 | N0 = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, N0); | ||||
9709 | N1 = DAG.getConstant(2, dl, MVT::v4i32); | ||||
9710 | N0 = DAG.getNode(ISD::ADD, dl, MVT::v4i32, N0, N1); | ||||
9711 | N0 = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, N0); | ||||
9712 | // Convert back to integer and return. | ||||
9713 | // return vmovn_u32(vcvt_s32_f32(result)); | ||||
9714 | N0 = DAG.getNode(ISD::FP_TO_SINT, dl, MVT::v4i32, N0); | ||||
9715 | N0 = DAG.getNode(ISD::TRUNCATE, dl, MVT::v4i16, N0); | ||||
9716 | return N0; | ||||
9717 | } | ||||
9718 | |||||
9719 | static SDValue LowerADDSUBCARRY(SDValue Op, SelectionDAG &DAG) { | ||||
9720 | SDNode *N = Op.getNode(); | ||||
9721 | EVT VT = N->getValueType(0); | ||||
9722 | SDVTList VTs = DAG.getVTList(VT, MVT::i32); | ||||
9723 | |||||
9724 | SDValue Carry = Op.getOperand(2); | ||||
9725 | |||||
9726 | SDLoc DL(Op); | ||||
9727 | |||||
9728 | SDValue Result; | ||||
9729 | if (Op.getOpcode() == ISD::ADDCARRY) { | ||||
9730 | // This converts the boolean value carry into the carry flag. | ||||
9731 | Carry = ConvertBooleanCarryToCarryFlag(Carry, DAG); | ||||
9732 | |||||
9733 | // Do the addition proper using the carry flag we wanted. | ||||
9734 | Result = DAG.getNode(ARMISD::ADDE, DL, VTs, Op.getOperand(0), | ||||
9735 | Op.getOperand(1), Carry); | ||||
9736 | |||||
9737 | // Now convert the carry flag into a boolean value. | ||||
9738 | Carry = ConvertCarryFlagToBooleanCarry(Result.getValue(1), VT, DAG); | ||||
9739 | } else { | ||||
9740 | // ARMISD::SUBE expects a carry not a borrow like ISD::SUBCARRY so we | ||||
9741 | // have to invert the carry first. | ||||
9742 | Carry = DAG.getNode(ISD::SUB, DL, MVT::i32, | ||||
9743 | DAG.getConstant(1, DL, MVT::i32), Carry); | ||||
9744 | // This converts the boolean value carry into the carry flag. | ||||
9745 | Carry = ConvertBooleanCarryToCarryFlag(Carry, DAG); | ||||
9746 | |||||
9747 | // Do the subtraction proper using the carry flag we wanted. | ||||
9748 | Result = DAG.getNode(ARMISD::SUBE, DL, VTs, Op.getOperand(0), | ||||
9749 | Op.getOperand(1), Carry); | ||||
9750 | |||||
9751 | // Now convert the carry flag into a boolean value. | ||||
9752 | Carry = ConvertCarryFlagToBooleanCarry(Result.getValue(1), VT, DAG); | ||||
9753 | // But the carry returned by ARMISD::SUBE is not a borrow as expected | ||||
9754 | // by ISD::SUBCARRY, so compute 1 - C. | ||||
9755 | Carry = DAG.getNode(ISD::SUB, DL, MVT::i32, | ||||
9756 | DAG.getConstant(1, DL, MVT::i32), Carry); | ||||
9757 | } | ||||
9758 | |||||
9759 | // Return both values. | ||||
9760 | return DAG.getNode(ISD::MERGE_VALUES, DL, N->getVTList(), Result, Carry); | ||||
9761 | } | ||||
9762 | |||||
9763 | SDValue ARMTargetLowering::LowerFSINCOS(SDValue Op, SelectionDAG &DAG) const { | ||||
9764 | assert(Subtarget->isTargetDarwin())(static_cast <bool> (Subtarget->isTargetDarwin()) ? void (0) : __assert_fail ("Subtarget->isTargetDarwin()", "llvm/lib/Target/ARM/ARMISelLowering.cpp" , 9764, __extension__ __PRETTY_FUNCTION__)); | ||||
9765 | |||||
9766 | // For iOS, we want to call an alternative entry point: __sincos_stret, | ||||
9767 | // return values are passed via sret. | ||||
9768 | SDLoc dl(Op); | ||||
9769 | SDValue Arg = Op.getOperand(0); | ||||
9770 | EVT ArgVT = Arg.getValueType(); | ||||
9771 | Type *ArgTy = ArgVT.getTypeForEVT(*DAG.getContext()); | ||||
9772 | auto PtrVT = getPointerTy(DAG.getDataLayout()); | ||||
9773 | |||||
9774 | MachineFrameInfo &MFI = DAG.getMachineFunction().getFrameInfo(); | ||||
9775 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | ||||
9776 | |||||
9777 | // Pair of floats / doubles used to pass the result. | ||||
9778 | Type *RetTy = StructType::get(ArgTy, ArgTy); | ||||
9779 | auto &DL = DAG.getDataLayout(); | ||||
9780 | |||||
9781 | ArgListTy Args; | ||||
9782 | bool ShouldUseSRet = Subtarget->isAPCS_ABI(); | ||||
9783 | SDValue SRet; | ||||
9784 | if (ShouldUseSRet) { | ||||
9785 | // Create stack object for sret. | ||||
9786 | const uint64_t ByteSize = DL.getTypeAllocSize(RetTy); | ||||
9787 | const Align StackAlign = DL.getPrefTypeAlign(RetTy); | ||||
9788 | int FrameIdx = MFI.CreateStackObject(ByteSize, StackAlign, false); | ||||
9789 | SRet = DAG.getFrameIndex(FrameIdx, TLI.getPointerTy(DL)); | ||||
9790 | |||||
9791 | ArgListEntry Entry; | ||||
9792 | Entry.Node = SRet; | ||||
9793 | Entry.Ty = RetTy->getPointerTo(); | ||||
9794 | Entry.IsSExt = false; | ||||
9795 | Entry.IsZExt = false; | ||||
9796 | Entry.IsSRet = true; | ||||
9797 | Args.push_back(Entry); | ||||
9798 | RetTy = Type::getVoidTy(*DAG.getContext()); | ||||
9799 | } | ||||
9800 | |||||
9801 | ArgListEntry Entry; | ||||
9802 | Entry.Node = Arg; | ||||
9803 | Entry.Ty = ArgTy; | ||||
9804 | Entry.IsSExt = false; | ||||
9805 | Entry.IsZExt = false; | ||||
9806 | Args.push_back(Entry); | ||||
9807 | |||||
9808 | RTLIB::Libcall LC = | ||||
9809 | (ArgVT == MVT::f64) ? RTLIB::SINCOS_STRET_F64 : RTLIB::SINCOS_STRET_F32; | ||||
9810 | const char *LibcallName = getLibcallName(LC); | ||||
9811 | CallingConv::ID CC = getLibcallCallingConv(LC); | ||||
9812 | SDValue Callee = DAG.getExternalSymbol(LibcallName, getPointerTy(DL)); | ||||
9813 | |||||
9814 | TargetLowering::CallLoweringInfo CLI(DAG); | ||||
9815 | CLI.setDebugLoc(dl) | ||||
9816 | .setChain(DAG.getEntryNode()) | ||||
9817 | .setCallee(CC, RetTy, Callee, std::move(Args)) | ||||
9818 | .setDiscardResult(ShouldUseSRet); | ||||
9819 | std::pair<SDValue, SDValue> CallResult = LowerCallTo(CLI); | ||||
9820 | |||||
9821 | if (!ShouldUseSRet) | ||||
9822 | return CallResult.first; | ||||
9823 | |||||
9824 | SDValue LoadSin = | ||||
9825 | DAG.getLoad(ArgVT, dl, CallResult.second, SRet, MachinePointerInfo()); | ||||
9826 | |||||
9827 | // Address of cos field. | ||||
9828 | SDValue Add = DAG.getNode(ISD::ADD, dl, PtrVT, SRet, | ||||
9829 | DAG.getIntPtrConstant(ArgVT.getStoreSize(), dl)); | ||||
9830 | SDValue LoadCos = | ||||
9831 | DAG.getLoad(ArgVT, dl, LoadSin.getValue(1), Add, MachinePointerInfo()); | ||||
9832 | |||||
9833 | SDVTList Tys = DAG.getVTList(ArgVT, ArgVT); | ||||
9834 | return DAG.getNode(ISD::MERGE_VALUES, dl, Tys, | ||||
9835 | LoadSin.getValue(0), LoadCos.getValue(0)); | ||||
9836 | } | ||||
9837 | |||||
9838 | SDValue ARMTargetLowering::LowerWindowsDIVLibCall(SDValue Op, SelectionDAG &DAG, | ||||
9839 | bool Signed, | ||||
9840 | SDValue &Chain) const { | ||||
9841 | EVT VT = Op.getValueType(); | ||||
9842 | assert((VT == MVT::i32 || VT == MVT::i64) &&(static_cast <bool> ((VT == MVT::i32 || VT == MVT::i64) && "unexpected type for custom lowering DIV") ? void (0) : __assert_fail ("(VT == MVT::i32 || VT == MVT::i64) && \"unexpected type for custom lowering DIV\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 9843, __extension__ __PRETTY_FUNCTION__)) | ||||
9843 | "unexpected type for custom lowering DIV")(static_cast <bool> ((VT == MVT::i32 || VT == MVT::i64) && "unexpected type for custom lowering DIV") ? void (0) : __assert_fail ("(VT == MVT::i32 || VT == MVT::i64) && \"unexpected type for custom lowering DIV\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 9843, __extension__ __PRETTY_FUNCTION__)); | ||||
9844 | SDLoc dl(Op); | ||||
9845 | |||||
9846 | const auto &DL = DAG.getDataLayout(); | ||||
9847 | const auto &TLI = DAG.getTargetLoweringInfo(); | ||||
9848 | |||||
9849 | const char *Name = nullptr; | ||||
9850 | if (Signed) | ||||
9851 | Name = (VT == MVT::i32) ? "__rt_sdiv" : "__rt_sdiv64"; | ||||
9852 | else | ||||
9853 | Name = (VT == MVT::i32) ? "__rt_udiv" : "__rt_udiv64"; | ||||
9854 | |||||
9855 | SDValue ES = DAG.getExternalSymbol(Name, TLI.getPointerTy(DL)); | ||||
9856 | |||||
9857 | ARMTargetLowering::ArgListTy Args; | ||||
9858 | |||||
9859 | for (auto AI : {1, 0}) { | ||||
9860 | ArgListEntry Arg; | ||||
9861 | Arg.Node = Op.getOperand(AI); | ||||
9862 | Arg.Ty = Arg.Node.getValueType().getTypeForEVT(*DAG.getContext()); | ||||
9863 | Args.push_back(Arg); | ||||
9864 | } | ||||
9865 | |||||
9866 | CallLoweringInfo CLI(DAG); | ||||
9867 | CLI.setDebugLoc(dl) | ||||
9868 | .setChain(Chain) | ||||
9869 | .setCallee(CallingConv::ARM_AAPCS_VFP, VT.getTypeForEVT(*DAG.getContext()), | ||||
9870 | ES, std::move(Args)); | ||||
9871 | |||||
9872 | return LowerCallTo(CLI).first; | ||||
9873 | } | ||||
9874 | |||||
9875 | // This is a code size optimisation: return the original SDIV node to | ||||
9876 | // DAGCombiner when we don't want to expand SDIV into a sequence of | ||||
9877 | // instructions, and an empty node otherwise which will cause the | ||||
9878 | // SDIV to be expanded in DAGCombine. | ||||
9879 | SDValue | ||||
9880 | ARMTargetLowering::BuildSDIVPow2(SDNode *N, const APInt &Divisor, | ||||
9881 | SelectionDAG &DAG, | ||||
9882 | SmallVectorImpl<SDNode *> &Created) const { | ||||
9883 | // TODO: Support SREM | ||||
9884 | if (N->getOpcode() != ISD::SDIV) | ||||
9885 | return SDValue(); | ||||
9886 | |||||
9887 | const auto &ST = static_cast<const ARMSubtarget&>(DAG.getSubtarget()); | ||||
9888 | const bool MinSize = ST.hasMinSize(); | ||||
9889 | const bool HasDivide = ST.isThumb() ? ST.hasDivideInThumbMode() | ||||
9890 | : ST.hasDivideInARMMode(); | ||||
9891 | |||||
9892 | // Don't touch vector types; rewriting this may lead to scalarizing | ||||
9893 | // the int divs. | ||||
9894 | if (N->getOperand(0).getValueType().isVector()) | ||||
9895 | return SDValue(); | ||||
9896 | |||||
9897 | // Bail if MinSize is not set, and also for both ARM and Thumb mode we need | ||||
9898 | // hwdiv support for this to be really profitable. | ||||
9899 | if (!(MinSize && HasDivide)) | ||||
9900 | return SDValue(); | ||||
9901 | |||||
9902 | // ARM mode is a bit simpler than Thumb: we can handle large power | ||||
9903 | // of 2 immediates with 1 mov instruction; no further checks required, | ||||
9904 | // just return the sdiv node. | ||||
9905 | if (!ST.isThumb()) | ||||
9906 | return SDValue(N, 0); | ||||
9907 | |||||
9908 | // In Thumb mode, immediates larger than 128 need a wide 4-byte MOV, | ||||
9909 | // and thus lose the code size benefits of a MOVS that requires only 2. | ||||
9910 | // TargetTransformInfo and 'getIntImmCodeSizeCost' could be helpful here, | ||||
9911 | // but as it's doing exactly this, it's not worth the trouble to get TTI. | ||||
9912 | if (Divisor.sgt(128)) | ||||
9913 | return SDValue(); | ||||
9914 | |||||
9915 | return SDValue(N, 0); | ||||
9916 | } | ||||
9917 | |||||
9918 | SDValue ARMTargetLowering::LowerDIV_Windows(SDValue Op, SelectionDAG &DAG, | ||||
9919 | bool Signed) const { | ||||
9920 | assert(Op.getValueType() == MVT::i32 &&(static_cast <bool> (Op.getValueType() == MVT::i32 && "unexpected type for custom lowering DIV") ? void (0) : __assert_fail ("Op.getValueType() == MVT::i32 && \"unexpected type for custom lowering DIV\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 9921, __extension__ __PRETTY_FUNCTION__)) | ||||
9921 | "unexpected type for custom lowering DIV")(static_cast <bool> (Op.getValueType() == MVT::i32 && "unexpected type for custom lowering DIV") ? void (0) : __assert_fail ("Op.getValueType() == MVT::i32 && \"unexpected type for custom lowering DIV\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 9921, __extension__ __PRETTY_FUNCTION__)); | ||||
9922 | SDLoc dl(Op); | ||||
9923 | |||||
9924 | SDValue DBZCHK = DAG.getNode(ARMISD::WIN__DBZCHK, dl, MVT::Other, | ||||
9925 | DAG.getEntryNode(), Op.getOperand(1)); | ||||
9926 | |||||
9927 | return LowerWindowsDIVLibCall(Op, DAG, Signed, DBZCHK); | ||||
9928 | } | ||||
9929 | |||||
9930 | static SDValue WinDBZCheckDenominator(SelectionDAG &DAG, SDNode *N, SDValue InChain) { | ||||
9931 | SDLoc DL(N); | ||||
9932 | SDValue Op = N->getOperand(1); | ||||
9933 | if (N->getValueType(0) == MVT::i32) | ||||
9934 | return DAG.getNode(ARMISD::WIN__DBZCHK, DL, MVT::Other, InChain, Op); | ||||
9935 | SDValue Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, MVT::i32, Op, | ||||
9936 | DAG.getConstant(0, DL, MVT::i32)); | ||||
9937 | SDValue Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, MVT::i32, Op, | ||||
9938 | DAG.getConstant(1, DL, MVT::i32)); | ||||
9939 | return DAG.getNode(ARMISD::WIN__DBZCHK, DL, MVT::Other, InChain, | ||||
9940 | DAG.getNode(ISD::OR, DL, MVT::i32, Lo, Hi)); | ||||
9941 | } | ||||
9942 | |||||
9943 | void ARMTargetLowering::ExpandDIV_Windows( | ||||
9944 | SDValue Op, SelectionDAG &DAG, bool Signed, | ||||
9945 | SmallVectorImpl<SDValue> &Results) const { | ||||
9946 | const auto &DL = DAG.getDataLayout(); | ||||
9947 | const auto &TLI = DAG.getTargetLoweringInfo(); | ||||
9948 | |||||
9949 | assert(Op.getValueType() == MVT::i64 &&(static_cast <bool> (Op.getValueType() == MVT::i64 && "unexpected type for custom lowering DIV") ? void (0) : __assert_fail ("Op.getValueType() == MVT::i64 && \"unexpected type for custom lowering DIV\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 9950, __extension__ __PRETTY_FUNCTION__)) | ||||
9950 | "unexpected type for custom lowering DIV")(static_cast <bool> (Op.getValueType() == MVT::i64 && "unexpected type for custom lowering DIV") ? void (0) : __assert_fail ("Op.getValueType() == MVT::i64 && \"unexpected type for custom lowering DIV\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 9950, __extension__ __PRETTY_FUNCTION__)); | ||||
9951 | SDLoc dl(Op); | ||||
9952 | |||||
9953 | SDValue DBZCHK = WinDBZCheckDenominator(DAG, Op.getNode(), DAG.getEntryNode()); | ||||
9954 | |||||
9955 | SDValue Result = LowerWindowsDIVLibCall(Op, DAG, Signed, DBZCHK); | ||||
9956 | |||||
9957 | SDValue Lower = DAG.getNode(ISD::TRUNCATE, dl, MVT::i32, Result); | ||||
9958 | SDValue Upper = DAG.getNode(ISD::SRL, dl, MVT::i64, Result, | ||||
9959 | DAG.getConstant(32, dl, TLI.getPointerTy(DL))); | ||||
9960 | Upper = DAG.getNode(ISD::TRUNCATE, dl, MVT::i32, Upper); | ||||
9961 | |||||
9962 | Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Lower, Upper)); | ||||
9963 | } | ||||
9964 | |||||
9965 | static SDValue LowerPredicateLoad(SDValue Op, SelectionDAG &DAG) { | ||||
9966 | LoadSDNode *LD = cast<LoadSDNode>(Op.getNode()); | ||||
9967 | EVT MemVT = LD->getMemoryVT(); | ||||
9968 | assert((MemVT == MVT::v2i1 || MemVT == MVT::v4i1 || MemVT == MVT::v8i1 ||(static_cast <bool> ((MemVT == MVT::v2i1 || MemVT == MVT ::v4i1 || MemVT == MVT::v8i1 || MemVT == MVT::v16i1) && "Expected a predicate type!") ? void (0) : __assert_fail ("(MemVT == MVT::v2i1 || MemVT == MVT::v4i1 || MemVT == MVT::v8i1 || MemVT == MVT::v16i1) && \"Expected a predicate type!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 9970, __extension__ __PRETTY_FUNCTION__)) | ||||
9969 | MemVT == MVT::v16i1) &&(static_cast <bool> ((MemVT == MVT::v2i1 || MemVT == MVT ::v4i1 || MemVT == MVT::v8i1 || MemVT == MVT::v16i1) && "Expected a predicate type!") ? void (0) : __assert_fail ("(MemVT == MVT::v2i1 || MemVT == MVT::v4i1 || MemVT == MVT::v8i1 || MemVT == MVT::v16i1) && \"Expected a predicate type!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 9970, __extension__ __PRETTY_FUNCTION__)) | ||||
9970 | "Expected a predicate type!")(static_cast <bool> ((MemVT == MVT::v2i1 || MemVT == MVT ::v4i1 || MemVT == MVT::v8i1 || MemVT == MVT::v16i1) && "Expected a predicate type!") ? void (0) : __assert_fail ("(MemVT == MVT::v2i1 || MemVT == MVT::v4i1 || MemVT == MVT::v8i1 || MemVT == MVT::v16i1) && \"Expected a predicate type!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 9970, __extension__ __PRETTY_FUNCTION__)); | ||||
9971 | assert(MemVT == Op.getValueType())(static_cast <bool> (MemVT == Op.getValueType()) ? void (0) : __assert_fail ("MemVT == Op.getValueType()", "llvm/lib/Target/ARM/ARMISelLowering.cpp" , 9971, __extension__ __PRETTY_FUNCTION__)); | ||||
9972 | assert(LD->getExtensionType() == ISD::NON_EXTLOAD &&(static_cast <bool> (LD->getExtensionType() == ISD:: NON_EXTLOAD && "Expected a non-extending load") ? void (0) : __assert_fail ("LD->getExtensionType() == ISD::NON_EXTLOAD && \"Expected a non-extending load\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 9973, __extension__ __PRETTY_FUNCTION__)) | ||||
9973 | "Expected a non-extending load")(static_cast <bool> (LD->getExtensionType() == ISD:: NON_EXTLOAD && "Expected a non-extending load") ? void (0) : __assert_fail ("LD->getExtensionType() == ISD::NON_EXTLOAD && \"Expected a non-extending load\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 9973, __extension__ __PRETTY_FUNCTION__)); | ||||
9974 | assert(LD->isUnindexed() && "Expected a unindexed load")(static_cast <bool> (LD->isUnindexed() && "Expected a unindexed load" ) ? void (0) : __assert_fail ("LD->isUnindexed() && \"Expected a unindexed load\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 9974, __extension__ __PRETTY_FUNCTION__)); | ||||
9975 | |||||
9976 | // The basic MVE VLDR on a v2i1/v4i1/v8i1 actually loads the entire 16bit | ||||
9977 | // predicate, with the "v4i1" bits spread out over the 16 bits loaded. We | ||||
9978 | // need to make sure that 8/4/2 bits are actually loaded into the correct | ||||
9979 | // place, which means loading the value and then shuffling the values into | ||||
9980 | // the bottom bits of the predicate. | ||||
9981 | // Equally, VLDR for an v16i1 will actually load 32bits (so will be incorrect | ||||
9982 | // for BE). | ||||
9983 | // Speaking of BE, apparently the rest of llvm will assume a reverse order to | ||||
9984 | // a natural VMSR(load), so needs to be reversed. | ||||
9985 | |||||
9986 | SDLoc dl(Op); | ||||
9987 | SDValue Load = DAG.getExtLoad( | ||||
9988 | ISD::EXTLOAD, dl, MVT::i32, LD->getChain(), LD->getBasePtr(), | ||||
9989 | EVT::getIntegerVT(*DAG.getContext(), MemVT.getSizeInBits()), | ||||
9990 | LD->getMemOperand()); | ||||
9991 | SDValue Val = Load; | ||||
9992 | if (DAG.getDataLayout().isBigEndian()) | ||||
9993 | Val = DAG.getNode(ISD::SRL, dl, MVT::i32, | ||||
9994 | DAG.getNode(ISD::BITREVERSE, dl, MVT::i32, Load), | ||||
9995 | DAG.getConstant(32 - MemVT.getSizeInBits(), dl, MVT::i32)); | ||||
9996 | SDValue Pred = DAG.getNode(ARMISD::PREDICATE_CAST, dl, MVT::v16i1, Val); | ||||
9997 | if (MemVT != MVT::v16i1) | ||||
9998 | Pred = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MemVT, Pred, | ||||
9999 | DAG.getConstant(0, dl, MVT::i32)); | ||||
10000 | return DAG.getMergeValues({Pred, Load.getValue(1)}, dl); | ||||
10001 | } | ||||
10002 | |||||
10003 | void ARMTargetLowering::LowerLOAD(SDNode *N, SmallVectorImpl<SDValue> &Results, | ||||
10004 | SelectionDAG &DAG) const { | ||||
10005 | LoadSDNode *LD = cast<LoadSDNode>(N); | ||||
10006 | EVT MemVT = LD->getMemoryVT(); | ||||
10007 | assert(LD->isUnindexed() && "Loads should be unindexed at this point.")(static_cast <bool> (LD->isUnindexed() && "Loads should be unindexed at this point." ) ? void (0) : __assert_fail ("LD->isUnindexed() && \"Loads should be unindexed at this point.\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 10007, __extension__ __PRETTY_FUNCTION__)); | ||||
10008 | |||||
10009 | if (MemVT == MVT::i64 && Subtarget->hasV5TEOps() && | ||||
10010 | !Subtarget->isThumb1Only() && LD->isVolatile()) { | ||||
10011 | SDLoc dl(N); | ||||
10012 | SDValue Result = DAG.getMemIntrinsicNode( | ||||
10013 | ARMISD::LDRD, dl, DAG.getVTList({MVT::i32, MVT::i32, MVT::Other}), | ||||
10014 | {LD->getChain(), LD->getBasePtr()}, MemVT, LD->getMemOperand()); | ||||
10015 | SDValue Lo = Result.getValue(DAG.getDataLayout().isLittleEndian() ? 0 : 1); | ||||
10016 | SDValue Hi = Result.getValue(DAG.getDataLayout().isLittleEndian() ? 1 : 0); | ||||
10017 | SDValue Pair = DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Lo, Hi); | ||||
10018 | Results.append({Pair, Result.getValue(2)}); | ||||
10019 | } | ||||
10020 | } | ||||
10021 | |||||
10022 | static SDValue LowerPredicateStore(SDValue Op, SelectionDAG &DAG) { | ||||
10023 | StoreSDNode *ST = cast<StoreSDNode>(Op.getNode()); | ||||
10024 | EVT MemVT = ST->getMemoryVT(); | ||||
10025 | assert((MemVT == MVT::v2i1 || MemVT == MVT::v4i1 || MemVT == MVT::v8i1 ||(static_cast <bool> ((MemVT == MVT::v2i1 || MemVT == MVT ::v4i1 || MemVT == MVT::v8i1 || MemVT == MVT::v16i1) && "Expected a predicate type!") ? void (0) : __assert_fail ("(MemVT == MVT::v2i1 || MemVT == MVT::v4i1 || MemVT == MVT::v8i1 || MemVT == MVT::v16i1) && \"Expected a predicate type!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 10027, __extension__ __PRETTY_FUNCTION__)) | ||||
10026 | MemVT == MVT::v16i1) &&(static_cast <bool> ((MemVT == MVT::v2i1 || MemVT == MVT ::v4i1 || MemVT == MVT::v8i1 || MemVT == MVT::v16i1) && "Expected a predicate type!") ? void (0) : __assert_fail ("(MemVT == MVT::v2i1 || MemVT == MVT::v4i1 || MemVT == MVT::v8i1 || MemVT == MVT::v16i1) && \"Expected a predicate type!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 10027, __extension__ __PRETTY_FUNCTION__)) | ||||
10027 | "Expected a predicate type!")(static_cast <bool> ((MemVT == MVT::v2i1 || MemVT == MVT ::v4i1 || MemVT == MVT::v8i1 || MemVT == MVT::v16i1) && "Expected a predicate type!") ? void (0) : __assert_fail ("(MemVT == MVT::v2i1 || MemVT == MVT::v4i1 || MemVT == MVT::v8i1 || MemVT == MVT::v16i1) && \"Expected a predicate type!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 10027, __extension__ __PRETTY_FUNCTION__)); | ||||
10028 | assert(MemVT == ST->getValue().getValueType())(static_cast <bool> (MemVT == ST->getValue().getValueType ()) ? void (0) : __assert_fail ("MemVT == ST->getValue().getValueType()" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 10028, __extension__ __PRETTY_FUNCTION__)); | ||||
10029 | assert(!ST->isTruncatingStore() && "Expected a non-extending store")(static_cast <bool> (!ST->isTruncatingStore() && "Expected a non-extending store") ? void (0) : __assert_fail ("!ST->isTruncatingStore() && \"Expected a non-extending store\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 10029, __extension__ __PRETTY_FUNCTION__)); | ||||
10030 | assert(ST->isUnindexed() && "Expected a unindexed store")(static_cast <bool> (ST->isUnindexed() && "Expected a unindexed store" ) ? void (0) : __assert_fail ("ST->isUnindexed() && \"Expected a unindexed store\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 10030, __extension__ __PRETTY_FUNCTION__)); | ||||
10031 | |||||
10032 | // Only store the v2i1 or v4i1 or v8i1 worth of bits, via a buildvector with | ||||
10033 | // top bits unset and a scalar store. | ||||
10034 | SDLoc dl(Op); | ||||
10035 | SDValue Build = ST->getValue(); | ||||
10036 | if (MemVT != MVT::v16i1) { | ||||
10037 | SmallVector<SDValue, 16> Ops; | ||||
10038 | for (unsigned I = 0; I < MemVT.getVectorNumElements(); I++) { | ||||
10039 | unsigned Elt = DAG.getDataLayout().isBigEndian() | ||||
10040 | ? MemVT.getVectorNumElements() - I - 1 | ||||
10041 | : I; | ||||
10042 | Ops.push_back(DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32, Build, | ||||
10043 | DAG.getConstant(Elt, dl, MVT::i32))); | ||||
10044 | } | ||||
10045 | for (unsigned I = MemVT.getVectorNumElements(); I < 16; I++) | ||||
10046 | Ops.push_back(DAG.getUNDEF(MVT::i32)); | ||||
10047 | Build = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v16i1, Ops); | ||||
10048 | } | ||||
10049 | SDValue GRP = DAG.getNode(ARMISD::PREDICATE_CAST, dl, MVT::i32, Build); | ||||
10050 | if (MemVT == MVT::v16i1 && DAG.getDataLayout().isBigEndian()) | ||||
10051 | GRP = DAG.getNode(ISD::SRL, dl, MVT::i32, | ||||
10052 | DAG.getNode(ISD::BITREVERSE, dl, MVT::i32, GRP), | ||||
10053 | DAG.getConstant(16, dl, MVT::i32)); | ||||
10054 | return DAG.getTruncStore( | ||||
10055 | ST->getChain(), dl, GRP, ST->getBasePtr(), | ||||
10056 | EVT::getIntegerVT(*DAG.getContext(), MemVT.getSizeInBits()), | ||||
10057 | ST->getMemOperand()); | ||||
10058 | } | ||||
10059 | |||||
10060 | static SDValue LowerSTORE(SDValue Op, SelectionDAG &DAG, | ||||
10061 | const ARMSubtarget *Subtarget) { | ||||
10062 | StoreSDNode *ST = cast<StoreSDNode>(Op.getNode()); | ||||
10063 | EVT MemVT = ST->getMemoryVT(); | ||||
10064 | assert(ST->isUnindexed() && "Stores should be unindexed at this point.")(static_cast <bool> (ST->isUnindexed() && "Stores should be unindexed at this point." ) ? void (0) : __assert_fail ("ST->isUnindexed() && \"Stores should be unindexed at this point.\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 10064, __extension__ __PRETTY_FUNCTION__)); | ||||
10065 | |||||
10066 | if (MemVT == MVT::i64 && Subtarget->hasV5TEOps() && | ||||
10067 | !Subtarget->isThumb1Only() && ST->isVolatile()) { | ||||
10068 | SDNode *N = Op.getNode(); | ||||
10069 | SDLoc dl(N); | ||||
10070 | |||||
10071 | SDValue Lo = DAG.getNode( | ||||
10072 | ISD::EXTRACT_ELEMENT, dl, MVT::i32, ST->getValue(), | ||||
10073 | DAG.getTargetConstant(DAG.getDataLayout().isLittleEndian() ? 0 : 1, dl, | ||||
10074 | MVT::i32)); | ||||
10075 | SDValue Hi = DAG.getNode( | ||||
10076 | ISD::EXTRACT_ELEMENT, dl, MVT::i32, ST->getValue(), | ||||
10077 | DAG.getTargetConstant(DAG.getDataLayout().isLittleEndian() ? 1 : 0, dl, | ||||
10078 | MVT::i32)); | ||||
10079 | |||||
10080 | return DAG.getMemIntrinsicNode(ARMISD::STRD, dl, DAG.getVTList(MVT::Other), | ||||
10081 | {ST->getChain(), Lo, Hi, ST->getBasePtr()}, | ||||
10082 | MemVT, ST->getMemOperand()); | ||||
10083 | } else if (Subtarget->hasMVEIntegerOps() && | ||||
10084 | ((MemVT == MVT::v2i1 || MemVT == MVT::v4i1 || MemVT == MVT::v8i1 || | ||||
10085 | MemVT == MVT::v16i1))) { | ||||
10086 | return LowerPredicateStore(Op, DAG); | ||||
10087 | } | ||||
10088 | |||||
10089 | return SDValue(); | ||||
10090 | } | ||||
10091 | |||||
10092 | static bool isZeroVector(SDValue N) { | ||||
10093 | return (ISD::isBuildVectorAllZeros(N.getNode()) || | ||||
10094 | (N->getOpcode() == ARMISD::VMOVIMM && | ||||
10095 | isNullConstant(N->getOperand(0)))); | ||||
10096 | } | ||||
10097 | |||||
10098 | static SDValue LowerMLOAD(SDValue Op, SelectionDAG &DAG) { | ||||
10099 | MaskedLoadSDNode *N = cast<MaskedLoadSDNode>(Op.getNode()); | ||||
10100 | MVT VT = Op.getSimpleValueType(); | ||||
10101 | SDValue Mask = N->getMask(); | ||||
10102 | SDValue PassThru = N->getPassThru(); | ||||
10103 | SDLoc dl(Op); | ||||
10104 | |||||
10105 | if (isZeroVector(PassThru)) | ||||
10106 | return Op; | ||||
10107 | |||||
10108 | // MVE Masked loads use zero as the passthru value. Here we convert undef to | ||||
10109 | // zero too, and other values are lowered to a select. | ||||
10110 | SDValue ZeroVec = DAG.getNode(ARMISD::VMOVIMM, dl, VT, | ||||
10111 | DAG.getTargetConstant(0, dl, MVT::i32)); | ||||
10112 | SDValue NewLoad = DAG.getMaskedLoad( | ||||
10113 | VT, dl, N->getChain(), N->getBasePtr(), N->getOffset(), Mask, ZeroVec, | ||||
10114 | N->getMemoryVT(), N->getMemOperand(), N->getAddressingMode(), | ||||
10115 | N->getExtensionType(), N->isExpandingLoad()); | ||||
10116 | SDValue Combo = NewLoad; | ||||
10117 | bool PassThruIsCastZero = (PassThru.getOpcode() == ISD::BITCAST || | ||||
10118 | PassThru.getOpcode() == ARMISD::VECTOR_REG_CAST) && | ||||
10119 | isZeroVector(PassThru->getOperand(0)); | ||||
10120 | if (!PassThru.isUndef() && !PassThruIsCastZero) | ||||
10121 | Combo = DAG.getNode(ISD::VSELECT, dl, VT, Mask, NewLoad, PassThru); | ||||
10122 | return DAG.getMergeValues({Combo, NewLoad.getValue(1)}, dl); | ||||
10123 | } | ||||
10124 | |||||
10125 | static SDValue LowerVecReduce(SDValue Op, SelectionDAG &DAG, | ||||
10126 | const ARMSubtarget *ST) { | ||||
10127 | if (!ST->hasMVEIntegerOps()) | ||||
10128 | return SDValue(); | ||||
10129 | |||||
10130 | SDLoc dl(Op); | ||||
10131 | unsigned BaseOpcode = 0; | ||||
10132 | switch (Op->getOpcode()) { | ||||
10133 | default: llvm_unreachable("Expected VECREDUCE opcode")::llvm::llvm_unreachable_internal("Expected VECREDUCE opcode" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 10133); | ||||
10134 | case ISD::VECREDUCE_FADD: BaseOpcode = ISD::FADD; break; | ||||
10135 | case ISD::VECREDUCE_FMUL: BaseOpcode = ISD::FMUL; break; | ||||
10136 | case ISD::VECREDUCE_MUL: BaseOpcode = ISD::MUL; break; | ||||
10137 | case ISD::VECREDUCE_AND: BaseOpcode = ISD::AND; break; | ||||
10138 | case ISD::VECREDUCE_OR: BaseOpcode = ISD::OR; break; | ||||
10139 | case ISD::VECREDUCE_XOR: BaseOpcode = ISD::XOR; break; | ||||
10140 | case ISD::VECREDUCE_FMAX: BaseOpcode = ISD::FMAXNUM; break; | ||||
10141 | case ISD::VECREDUCE_FMIN: BaseOpcode = ISD::FMINNUM; break; | ||||
10142 | } | ||||
10143 | |||||
10144 | SDValue Op0 = Op->getOperand(0); | ||||
10145 | EVT VT = Op0.getValueType(); | ||||
10146 | EVT EltVT = VT.getVectorElementType(); | ||||
10147 | unsigned NumElts = VT.getVectorNumElements(); | ||||
10148 | unsigned NumActiveLanes = NumElts; | ||||
10149 | |||||
10150 | assert((NumActiveLanes == 16 || NumActiveLanes == 8 || NumActiveLanes == 4 ||(static_cast <bool> ((NumActiveLanes == 16 || NumActiveLanes == 8 || NumActiveLanes == 4 || NumActiveLanes == 2) && "Only expected a power 2 vector size") ? void (0) : __assert_fail ("(NumActiveLanes == 16 || NumActiveLanes == 8 || NumActiveLanes == 4 || NumActiveLanes == 2) && \"Only expected a power 2 vector size\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 10152, __extension__ __PRETTY_FUNCTION__)) | ||||
10151 | NumActiveLanes == 2) &&(static_cast <bool> ((NumActiveLanes == 16 || NumActiveLanes == 8 || NumActiveLanes == 4 || NumActiveLanes == 2) && "Only expected a power 2 vector size") ? void (0) : __assert_fail ("(NumActiveLanes == 16 || NumActiveLanes == 8 || NumActiveLanes == 4 || NumActiveLanes == 2) && \"Only expected a power 2 vector size\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 10152, __extension__ __PRETTY_FUNCTION__)) | ||||
10152 | "Only expected a power 2 vector size")(static_cast <bool> ((NumActiveLanes == 16 || NumActiveLanes == 8 || NumActiveLanes == 4 || NumActiveLanes == 2) && "Only expected a power 2 vector size") ? void (0) : __assert_fail ("(NumActiveLanes == 16 || NumActiveLanes == 8 || NumActiveLanes == 4 || NumActiveLanes == 2) && \"Only expected a power 2 vector size\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 10152, __extension__ __PRETTY_FUNCTION__)); | ||||
10153 | |||||
10154 | // Use Mul(X, Rev(X)) until 4 items remain. Going down to 4 vector elements | ||||
10155 | // allows us to easily extract vector elements from the lanes. | ||||
10156 | while (NumActiveLanes > 4) { | ||||
10157 | unsigned RevOpcode = NumActiveLanes == 16 ? ARMISD::VREV16 : ARMISD::VREV32; | ||||
10158 | SDValue Rev = DAG.getNode(RevOpcode, dl, VT, Op0); | ||||
10159 | Op0 = DAG.getNode(BaseOpcode, dl, VT, Op0, Rev); | ||||
10160 | NumActiveLanes /= 2; | ||||
10161 | } | ||||
10162 | |||||
10163 | SDValue Res; | ||||
10164 | if (NumActiveLanes == 4) { | ||||
10165 | // The remaining 4 elements are summed sequentially | ||||
10166 | SDValue Ext0 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, EltVT, Op0, | ||||
10167 | DAG.getConstant(0 * NumElts / 4, dl, MVT::i32)); | ||||
10168 | SDValue Ext1 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, EltVT, Op0, | ||||
10169 | DAG.getConstant(1 * NumElts / 4, dl, MVT::i32)); | ||||
10170 | SDValue Ext2 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, EltVT, Op0, | ||||
10171 | DAG.getConstant(2 * NumElts / 4, dl, MVT::i32)); | ||||
10172 | SDValue Ext3 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, EltVT, Op0, | ||||
10173 | DAG.getConstant(3 * NumElts / 4, dl, MVT::i32)); | ||||
10174 | SDValue Res0 = DAG.getNode(BaseOpcode, dl, EltVT, Ext0, Ext1, Op->getFlags()); | ||||
10175 | SDValue Res1 = DAG.getNode(BaseOpcode, dl, EltVT, Ext2, Ext3, Op->getFlags()); | ||||
10176 | Res = DAG.getNode(BaseOpcode, dl, EltVT, Res0, Res1, Op->getFlags()); | ||||
10177 | } else { | ||||
10178 | SDValue Ext0 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, EltVT, Op0, | ||||
10179 | DAG.getConstant(0, dl, MVT::i32)); | ||||
10180 | SDValue Ext1 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, EltVT, Op0, | ||||
10181 | DAG.getConstant(1, dl, MVT::i32)); | ||||
10182 | Res = DAG.getNode(BaseOpcode, dl, EltVT, Ext0, Ext1, Op->getFlags()); | ||||
10183 | } | ||||
10184 | |||||
10185 | // Result type may be wider than element type. | ||||
10186 | if (EltVT != Op->getValueType(0)) | ||||
10187 | Res = DAG.getNode(ISD::ANY_EXTEND, dl, Op->getValueType(0), Res); | ||||
10188 | return Res; | ||||
10189 | } | ||||
10190 | |||||
10191 | static SDValue LowerVecReduceF(SDValue Op, SelectionDAG &DAG, | ||||
10192 | const ARMSubtarget *ST) { | ||||
10193 | if (!ST->hasMVEFloatOps()) | ||||
10194 | return SDValue(); | ||||
10195 | return LowerVecReduce(Op, DAG, ST); | ||||
10196 | } | ||||
10197 | |||||
10198 | static SDValue LowerAtomicLoadStore(SDValue Op, SelectionDAG &DAG) { | ||||
10199 | if (isStrongerThanMonotonic(cast<AtomicSDNode>(Op)->getSuccessOrdering())) | ||||
10200 | // Acquire/Release load/store is not legal for targets without a dmb or | ||||
10201 | // equivalent available. | ||||
10202 | return SDValue(); | ||||
10203 | |||||
10204 | // Monotonic load/store is legal for all targets. | ||||
10205 | return Op; | ||||
10206 | } | ||||
10207 | |||||
10208 | static void ReplaceREADCYCLECOUNTER(SDNode *N, | ||||
10209 | SmallVectorImpl<SDValue> &Results, | ||||
10210 | SelectionDAG &DAG, | ||||
10211 | const ARMSubtarget *Subtarget) { | ||||
10212 | SDLoc DL(N); | ||||
10213 | // Under Power Management extensions, the cycle-count is: | ||||
10214 | // mrc p15, #0, <Rt>, c9, c13, #0 | ||||
10215 | SDValue Ops[] = { N->getOperand(0), // Chain | ||||
10216 | DAG.getTargetConstant(Intrinsic::arm_mrc, DL, MVT::i32), | ||||
10217 | DAG.getTargetConstant(15, DL, MVT::i32), | ||||
10218 | DAG.getTargetConstant(0, DL, MVT::i32), | ||||
10219 | DAG.getTargetConstant(9, DL, MVT::i32), | ||||
10220 | DAG.getTargetConstant(13, DL, MVT::i32), | ||||
10221 | DAG.getTargetConstant(0, DL, MVT::i32) | ||||
10222 | }; | ||||
10223 | |||||
10224 | SDValue Cycles32 = DAG.getNode(ISD::INTRINSIC_W_CHAIN, DL, | ||||
10225 | DAG.getVTList(MVT::i32, MVT::Other), Ops); | ||||
10226 | Results.push_back(DAG.getNode(ISD::BUILD_PAIR, DL, MVT::i64, Cycles32, | ||||
10227 | DAG.getConstant(0, DL, MVT::i32))); | ||||
10228 | Results.push_back(Cycles32.getValue(1)); | ||||
10229 | } | ||||
10230 | |||||
10231 | static SDValue createGPRPairNode(SelectionDAG &DAG, SDValue V) { | ||||
10232 | SDLoc dl(V.getNode()); | ||||
10233 | SDValue VLo = DAG.getAnyExtOrTrunc(V, dl, MVT::i32); | ||||
10234 | SDValue VHi = DAG.getAnyExtOrTrunc( | ||||
10235 | DAG.getNode(ISD::SRL, dl, MVT::i64, V, DAG.getConstant(32, dl, MVT::i32)), | ||||
10236 | dl, MVT::i32); | ||||
10237 | bool isBigEndian = DAG.getDataLayout().isBigEndian(); | ||||
10238 | if (isBigEndian) | ||||
10239 | std::swap (VLo, VHi); | ||||
10240 | SDValue RegClass = | ||||
10241 | DAG.getTargetConstant(ARM::GPRPairRegClassID, dl, MVT::i32); | ||||
10242 | SDValue SubReg0 = DAG.getTargetConstant(ARM::gsub_0, dl, MVT::i32); | ||||
10243 | SDValue SubReg1 = DAG.getTargetConstant(ARM::gsub_1, dl, MVT::i32); | ||||
10244 | const SDValue Ops[] = { RegClass, VLo, SubReg0, VHi, SubReg1 }; | ||||
10245 | return SDValue( | ||||
10246 | DAG.getMachineNode(TargetOpcode::REG_SEQUENCE, dl, MVT::Untyped, Ops), 0); | ||||
10247 | } | ||||
10248 | |||||
10249 | static void ReplaceCMP_SWAP_64Results(SDNode *N, | ||||
10250 | SmallVectorImpl<SDValue> & Results, | ||||
10251 | SelectionDAG &DAG) { | ||||
10252 | assert(N->getValueType(0) == MVT::i64 &&(static_cast <bool> (N->getValueType(0) == MVT::i64 && "AtomicCmpSwap on types less than 64 should be legal") ? void (0) : __assert_fail ("N->getValueType(0) == MVT::i64 && \"AtomicCmpSwap on types less than 64 should be legal\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 10253, __extension__ __PRETTY_FUNCTION__)) | ||||
10253 | "AtomicCmpSwap on types less than 64 should be legal")(static_cast <bool> (N->getValueType(0) == MVT::i64 && "AtomicCmpSwap on types less than 64 should be legal") ? void (0) : __assert_fail ("N->getValueType(0) == MVT::i64 && \"AtomicCmpSwap on types less than 64 should be legal\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 10253, __extension__ __PRETTY_FUNCTION__)); | ||||
10254 | SDValue Ops[] = {N->getOperand(1), | ||||
10255 | createGPRPairNode(DAG, N->getOperand(2)), | ||||
10256 | createGPRPairNode(DAG, N->getOperand(3)), | ||||
10257 | N->getOperand(0)}; | ||||
10258 | SDNode *CmpSwap = DAG.getMachineNode( | ||||
10259 | ARM::CMP_SWAP_64, SDLoc(N), | ||||
10260 | DAG.getVTList(MVT::Untyped, MVT::i32, MVT::Other), Ops); | ||||
10261 | |||||
10262 | MachineMemOperand *MemOp = cast<MemSDNode>(N)->getMemOperand(); | ||||
10263 | DAG.setNodeMemRefs(cast<MachineSDNode>(CmpSwap), {MemOp}); | ||||
10264 | |||||
10265 | bool isBigEndian = DAG.getDataLayout().isBigEndian(); | ||||
10266 | |||||
10267 | SDValue Lo = | ||||
10268 | DAG.getTargetExtractSubreg(isBigEndian ? ARM::gsub_1 : ARM::gsub_0, | ||||
10269 | SDLoc(N), MVT::i32, SDValue(CmpSwap, 0)); | ||||
10270 | SDValue Hi = | ||||
10271 | DAG.getTargetExtractSubreg(isBigEndian ? ARM::gsub_0 : ARM::gsub_1, | ||||
10272 | SDLoc(N), MVT::i32, SDValue(CmpSwap, 0)); | ||||
10273 | Results.push_back(DAG.getNode(ISD::BUILD_PAIR, SDLoc(N), MVT::i64, Lo, Hi)); | ||||
10274 | Results.push_back(SDValue(CmpSwap, 2)); | ||||
10275 | } | ||||
10276 | |||||
10277 | SDValue ARMTargetLowering::LowerFSETCC(SDValue Op, SelectionDAG &DAG) const { | ||||
10278 | SDLoc dl(Op); | ||||
10279 | EVT VT = Op.getValueType(); | ||||
10280 | SDValue Chain = Op.getOperand(0); | ||||
10281 | SDValue LHS = Op.getOperand(1); | ||||
10282 | SDValue RHS = Op.getOperand(2); | ||||
10283 | ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(3))->get(); | ||||
10284 | bool IsSignaling = Op.getOpcode() == ISD::STRICT_FSETCCS; | ||||
10285 | |||||
10286 | // If we don't have instructions of this float type then soften to a libcall | ||||
10287 | // and use SETCC instead. | ||||
10288 | if (isUnsupportedFloatingType(LHS.getValueType())) { | ||||
10289 | DAG.getTargetLoweringInfo().softenSetCCOperands( | ||||
10290 | DAG, LHS.getValueType(), LHS, RHS, CC, dl, LHS, RHS, Chain, IsSignaling); | ||||
10291 | if (!RHS.getNode()) { | ||||
10292 | RHS = DAG.getConstant(0, dl, LHS.getValueType()); | ||||
10293 | CC = ISD::SETNE; | ||||
10294 | } | ||||
10295 | SDValue Result = DAG.getNode(ISD::SETCC, dl, VT, LHS, RHS, | ||||
10296 | DAG.getCondCode(CC)); | ||||
10297 | return DAG.getMergeValues({Result, Chain}, dl); | ||||
10298 | } | ||||
10299 | |||||
10300 | ARMCC::CondCodes CondCode, CondCode2; | ||||
10301 | FPCCToARMCC(CC, CondCode, CondCode2); | ||||
10302 | |||||
10303 | // FIXME: Chain is not handled correctly here. Currently the FPSCR is implicit | ||||
10304 | // in CMPFP and CMPFPE, but instead it should be made explicit by these | ||||
10305 | // instructions using a chain instead of glue. This would also fix the problem | ||||
10306 | // here (and also in LowerSELECT_CC) where we generate two comparisons when | ||||
10307 | // CondCode2 != AL. | ||||
10308 | SDValue True = DAG.getConstant(1, dl, VT); | ||||
10309 | SDValue False = DAG.getConstant(0, dl, VT); | ||||
10310 | SDValue ARMcc = DAG.getConstant(CondCode, dl, MVT::i32); | ||||
10311 | SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32); | ||||
10312 | SDValue Cmp = getVFPCmp(LHS, RHS, DAG, dl, IsSignaling); | ||||
10313 | SDValue Result = getCMOV(dl, VT, False, True, ARMcc, CCR, Cmp, DAG); | ||||
10314 | if (CondCode2 != ARMCC::AL) { | ||||
10315 | ARMcc = DAG.getConstant(CondCode2, dl, MVT::i32); | ||||
10316 | Cmp = getVFPCmp(LHS, RHS, DAG, dl, IsSignaling); | ||||
10317 | Result = getCMOV(dl, VT, Result, True, ARMcc, CCR, Cmp, DAG); | ||||
10318 | } | ||||
10319 | return DAG.getMergeValues({Result, Chain}, dl); | ||||
10320 | } | ||||
10321 | |||||
10322 | SDValue ARMTargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const { | ||||
10323 | LLVM_DEBUG(dbgs() << "Lowering node: "; Op.dump())do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("arm-isel")) { dbgs() << "Lowering node: "; Op.dump(); } } while (false); | ||||
10324 | switch (Op.getOpcode()) { | ||||
10325 | default: llvm_unreachable("Don't know how to custom lower this!")::llvm::llvm_unreachable_internal("Don't know how to custom lower this!" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 10325); | ||||
10326 | case ISD::WRITE_REGISTER: return LowerWRITE_REGISTER(Op, DAG); | ||||
10327 | case ISD::ConstantPool: return LowerConstantPool(Op, DAG); | ||||
10328 | case ISD::BlockAddress: return LowerBlockAddress(Op, DAG); | ||||
10329 | case ISD::GlobalAddress: return LowerGlobalAddress(Op, DAG); | ||||
10330 | case ISD::GlobalTLSAddress: return LowerGlobalTLSAddress(Op, DAG); | ||||
10331 | case ISD::SELECT: return LowerSELECT(Op, DAG); | ||||
10332 | case ISD::SELECT_CC: return LowerSELECT_CC(Op, DAG); | ||||
10333 | case ISD::BRCOND: return LowerBRCOND(Op, DAG); | ||||
10334 | case ISD::BR_CC: return LowerBR_CC(Op, DAG); | ||||
10335 | case ISD::BR_JT: return LowerBR_JT(Op, DAG); | ||||
10336 | case ISD::VASTART: return LowerVASTART(Op, DAG); | ||||
10337 | case ISD::ATOMIC_FENCE: return LowerATOMIC_FENCE(Op, DAG, Subtarget); | ||||
10338 | case ISD::PREFETCH: return LowerPREFETCH(Op, DAG, Subtarget); | ||||
10339 | case ISD::SINT_TO_FP: | ||||
10340 | case ISD::UINT_TO_FP: return LowerINT_TO_FP(Op, DAG); | ||||
10341 | case ISD::STRICT_FP_TO_SINT: | ||||
10342 | case ISD::STRICT_FP_TO_UINT: | ||||
10343 | case ISD::FP_TO_SINT: | ||||
10344 | case ISD::FP_TO_UINT: return LowerFP_TO_INT(Op, DAG); | ||||
10345 | case ISD::FP_TO_SINT_SAT: | ||||
10346 | case ISD::FP_TO_UINT_SAT: return LowerFP_TO_INT_SAT(Op, DAG, Subtarget); | ||||
10347 | case ISD::FCOPYSIGN: return LowerFCOPYSIGN(Op, DAG); | ||||
10348 | case ISD::RETURNADDR: return LowerRETURNADDR(Op, DAG); | ||||
10349 | case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG); | ||||
10350 | case ISD::EH_SJLJ_SETJMP: return LowerEH_SJLJ_SETJMP(Op, DAG); | ||||
10351 | case ISD::EH_SJLJ_LONGJMP: return LowerEH_SJLJ_LONGJMP(Op, DAG); | ||||
10352 | case ISD::EH_SJLJ_SETUP_DISPATCH: return LowerEH_SJLJ_SETUP_DISPATCH(Op, DAG); | ||||
10353 | case ISD::INTRINSIC_VOID: return LowerINTRINSIC_VOID(Op, DAG, Subtarget); | ||||
10354 | case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG, | ||||
10355 | Subtarget); | ||||
10356 | case ISD::BITCAST: return ExpandBITCAST(Op.getNode(), DAG, Subtarget); | ||||
10357 | case ISD::SHL: | ||||
10358 | case ISD::SRL: | ||||
10359 | case ISD::SRA: return LowerShift(Op.getNode(), DAG, Subtarget); | ||||
10360 | case ISD::SREM: return LowerREM(Op.getNode(), DAG); | ||||
10361 | case ISD::UREM: return LowerREM(Op.getNode(), DAG); | ||||
10362 | case ISD::SHL_PARTS: return LowerShiftLeftParts(Op, DAG); | ||||
10363 | case ISD::SRL_PARTS: | ||||
10364 | case ISD::SRA_PARTS: return LowerShiftRightParts(Op, DAG); | ||||
10365 | case ISD::CTTZ: | ||||
10366 | case ISD::CTTZ_ZERO_UNDEF: return LowerCTTZ(Op.getNode(), DAG, Subtarget); | ||||
10367 | case ISD::CTPOP: return LowerCTPOP(Op.getNode(), DAG, Subtarget); | ||||
10368 | case ISD::SETCC: return LowerVSETCC(Op, DAG, Subtarget); | ||||
10369 | case ISD::SETCCCARRY: return LowerSETCCCARRY(Op, DAG); | ||||
10370 | case ISD::ConstantFP: return LowerConstantFP(Op, DAG, Subtarget); | ||||
10371 | case ISD::BUILD_VECTOR: return LowerBUILD_VECTOR(Op, DAG, Subtarget); | ||||
10372 | case ISD::VECTOR_SHUFFLE: return LowerVECTOR_SHUFFLE(Op, DAG, Subtarget); | ||||
10373 | case ISD::EXTRACT_SUBVECTOR: return LowerEXTRACT_SUBVECTOR(Op, DAG, Subtarget); | ||||
10374 | case ISD::INSERT_VECTOR_ELT: return LowerINSERT_VECTOR_ELT(Op, DAG); | ||||
10375 | case ISD::EXTRACT_VECTOR_ELT: return LowerEXTRACT_VECTOR_ELT(Op, DAG, Subtarget); | ||||
10376 | case ISD::CONCAT_VECTORS: return LowerCONCAT_VECTORS(Op, DAG, Subtarget); | ||||
10377 | case ISD::TRUNCATE: return LowerTruncate(Op.getNode(), DAG, Subtarget); | ||||
10378 | case ISD::SIGN_EXTEND: | ||||
10379 | case ISD::ZERO_EXTEND: return LowerVectorExtend(Op.getNode(), DAG, Subtarget); | ||||
10380 | case ISD::FLT_ROUNDS_: return LowerFLT_ROUNDS_(Op, DAG); | ||||
10381 | case ISD::SET_ROUNDING: return LowerSET_ROUNDING(Op, DAG); | ||||
10382 | case ISD::MUL: return LowerMUL(Op, DAG); | ||||
10383 | case ISD::SDIV: | ||||
10384 | if (Subtarget->isTargetWindows() && !Op.getValueType().isVector()) | ||||
10385 | return LowerDIV_Windows(Op, DAG, /* Signed */ true); | ||||
10386 | return LowerSDIV(Op, DAG, Subtarget); | ||||
10387 | case ISD::UDIV: | ||||
10388 | if (Subtarget->isTargetWindows() && !Op.getValueType().isVector()) | ||||
10389 | return LowerDIV_Windows(Op, DAG, /* Signed */ false); | ||||
10390 | return LowerUDIV(Op, DAG, Subtarget); | ||||
10391 | case ISD::ADDCARRY: | ||||
10392 | case ISD::SUBCARRY: return LowerADDSUBCARRY(Op, DAG); | ||||
10393 | case ISD::SADDO: | ||||
10394 | case ISD::SSUBO: | ||||
10395 | return LowerSignedALUO(Op, DAG); | ||||
10396 | case ISD::UADDO: | ||||
10397 | case ISD::USUBO: | ||||
10398 | return LowerUnsignedALUO(Op, DAG); | ||||
10399 | case ISD::SADDSAT: | ||||
10400 | case ISD::SSUBSAT: | ||||
10401 | case ISD::UADDSAT: | ||||
10402 | case ISD::USUBSAT: | ||||
10403 | return LowerADDSUBSAT(Op, DAG, Subtarget); | ||||
10404 | case ISD::LOAD: | ||||
10405 | return LowerPredicateLoad(Op, DAG); | ||||
10406 | case ISD::STORE: | ||||
10407 | return LowerSTORE(Op, DAG, Subtarget); | ||||
10408 | case ISD::MLOAD: | ||||
10409 | return LowerMLOAD(Op, DAG); | ||||
10410 | case ISD::VECREDUCE_MUL: | ||||
10411 | case ISD::VECREDUCE_AND: | ||||
10412 | case ISD::VECREDUCE_OR: | ||||
10413 | case ISD::VECREDUCE_XOR: | ||||
10414 | return LowerVecReduce(Op, DAG, Subtarget); | ||||
10415 | case ISD::VECREDUCE_FADD: | ||||
10416 | case ISD::VECREDUCE_FMUL: | ||||
10417 | case ISD::VECREDUCE_FMIN: | ||||
10418 | case ISD::VECREDUCE_FMAX: | ||||
10419 | return LowerVecReduceF(Op, DAG, Subtarget); | ||||
10420 | case ISD::ATOMIC_LOAD: | ||||
10421 | case ISD::ATOMIC_STORE: return LowerAtomicLoadStore(Op, DAG); | ||||
10422 | case ISD::FSINCOS: return LowerFSINCOS(Op, DAG); | ||||
10423 | case ISD::SDIVREM: | ||||
10424 | case ISD::UDIVREM: return LowerDivRem(Op, DAG); | ||||
10425 | case ISD::DYNAMIC_STACKALLOC: | ||||
10426 | if (Subtarget->isTargetWindows()) | ||||
10427 | return LowerDYNAMIC_STACKALLOC(Op, DAG); | ||||
10428 | llvm_unreachable("Don't know how to custom lower this!")::llvm::llvm_unreachable_internal("Don't know how to custom lower this!" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 10428); | ||||
10429 | case ISD::STRICT_FP_ROUND: | ||||
10430 | case ISD::FP_ROUND: return LowerFP_ROUND(Op, DAG); | ||||
10431 | case ISD::STRICT_FP_EXTEND: | ||||
10432 | case ISD::FP_EXTEND: return LowerFP_EXTEND(Op, DAG); | ||||
10433 | case ISD::STRICT_FSETCC: | ||||
10434 | case ISD::STRICT_FSETCCS: return LowerFSETCC(Op, DAG); | ||||
10435 | case ARMISD::WIN__DBZCHK: return SDValue(); | ||||
10436 | } | ||||
10437 | } | ||||
10438 | |||||
10439 | static void ReplaceLongIntrinsic(SDNode *N, SmallVectorImpl<SDValue> &Results, | ||||
10440 | SelectionDAG &DAG) { | ||||
10441 | unsigned IntNo = cast<ConstantSDNode>(N->getOperand(0))->getZExtValue(); | ||||
10442 | unsigned Opc = 0; | ||||
10443 | if (IntNo == Intrinsic::arm_smlald) | ||||
10444 | Opc = ARMISD::SMLALD; | ||||
10445 | else if (IntNo == Intrinsic::arm_smlaldx) | ||||
10446 | Opc = ARMISD::SMLALDX; | ||||
10447 | else if (IntNo == Intrinsic::arm_smlsld) | ||||
10448 | Opc = ARMISD::SMLSLD; | ||||
10449 | else if (IntNo == Intrinsic::arm_smlsldx) | ||||
10450 | Opc = ARMISD::SMLSLDX; | ||||
10451 | else | ||||
10452 | return; | ||||
10453 | |||||
10454 | SDLoc dl(N); | ||||
10455 | SDValue Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, | ||||
10456 | N->getOperand(3), | ||||
10457 | DAG.getConstant(0, dl, MVT::i32)); | ||||
10458 | SDValue Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, | ||||
10459 | N->getOperand(3), | ||||
10460 | DAG.getConstant(1, dl, MVT::i32)); | ||||
10461 | |||||
10462 | SDValue LongMul = DAG.getNode(Opc, dl, | ||||
10463 | DAG.getVTList(MVT::i32, MVT::i32), | ||||
10464 | N->getOperand(1), N->getOperand(2), | ||||
10465 | Lo, Hi); | ||||
10466 | Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, | ||||
10467 | LongMul.getValue(0), LongMul.getValue(1))); | ||||
10468 | } | ||||
10469 | |||||
10470 | /// ReplaceNodeResults - Replace the results of node with an illegal result | ||||
10471 | /// type with new values built out of custom code. | ||||
10472 | void ARMTargetLowering::ReplaceNodeResults(SDNode *N, | ||||
10473 | SmallVectorImpl<SDValue> &Results, | ||||
10474 | SelectionDAG &DAG) const { | ||||
10475 | SDValue Res; | ||||
10476 | switch (N->getOpcode()) { | ||||
10477 | default: | ||||
10478 | llvm_unreachable("Don't know how to custom expand this!")::llvm::llvm_unreachable_internal("Don't know how to custom expand this!" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 10478); | ||||
10479 | case ISD::READ_REGISTER: | ||||
10480 | ExpandREAD_REGISTER(N, Results, DAG); | ||||
10481 | break; | ||||
10482 | case ISD::BITCAST: | ||||
10483 | Res = ExpandBITCAST(N, DAG, Subtarget); | ||||
10484 | break; | ||||
10485 | case ISD::SRL: | ||||
10486 | case ISD::SRA: | ||||
10487 | case ISD::SHL: | ||||
10488 | Res = Expand64BitShift(N, DAG, Subtarget); | ||||
10489 | break; | ||||
10490 | case ISD::SREM: | ||||
10491 | case ISD::UREM: | ||||
10492 | Res = LowerREM(N, DAG); | ||||
10493 | break; | ||||
10494 | case ISD::SDIVREM: | ||||
10495 | case ISD::UDIVREM: | ||||
10496 | Res = LowerDivRem(SDValue(N, 0), DAG); | ||||
10497 | assert(Res.getNumOperands() == 2 && "DivRem needs two values")(static_cast <bool> (Res.getNumOperands() == 2 && "DivRem needs two values") ? void (0) : __assert_fail ("Res.getNumOperands() == 2 && \"DivRem needs two values\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 10497, __extension__ __PRETTY_FUNCTION__)); | ||||
10498 | Results.push_back(Res.getValue(0)); | ||||
10499 | Results.push_back(Res.getValue(1)); | ||||
10500 | return; | ||||
10501 | case ISD::SADDSAT: | ||||
10502 | case ISD::SSUBSAT: | ||||
10503 | case ISD::UADDSAT: | ||||
10504 | case ISD::USUBSAT: | ||||
10505 | Res = LowerADDSUBSAT(SDValue(N, 0), DAG, Subtarget); | ||||
10506 | break; | ||||
10507 | case ISD::READCYCLECOUNTER: | ||||
10508 | ReplaceREADCYCLECOUNTER(N, Results, DAG, Subtarget); | ||||
10509 | return; | ||||
10510 | case ISD::UDIV: | ||||
10511 | case ISD::SDIV: | ||||
10512 | assert(Subtarget->isTargetWindows() && "can only expand DIV on Windows")(static_cast <bool> (Subtarget->isTargetWindows() && "can only expand DIV on Windows") ? void (0) : __assert_fail ("Subtarget->isTargetWindows() && \"can only expand DIV on Windows\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 10512, __extension__ __PRETTY_FUNCTION__)); | ||||
10513 | return ExpandDIV_Windows(SDValue(N, 0), DAG, N->getOpcode() == ISD::SDIV, | ||||
10514 | Results); | ||||
10515 | case ISD::ATOMIC_CMP_SWAP: | ||||
10516 | ReplaceCMP_SWAP_64Results(N, Results, DAG); | ||||
10517 | return; | ||||
10518 | case ISD::INTRINSIC_WO_CHAIN: | ||||
10519 | return ReplaceLongIntrinsic(N, Results, DAG); | ||||
10520 | case ISD::LOAD: | ||||
10521 | LowerLOAD(N, Results, DAG); | ||||
10522 | break; | ||||
10523 | case ISD::TRUNCATE: | ||||
10524 | Res = LowerTruncate(N, DAG, Subtarget); | ||||
10525 | break; | ||||
10526 | case ISD::SIGN_EXTEND: | ||||
10527 | case ISD::ZERO_EXTEND: | ||||
10528 | Res = LowerVectorExtend(N, DAG, Subtarget); | ||||
10529 | break; | ||||
10530 | case ISD::FP_TO_SINT_SAT: | ||||
10531 | case ISD::FP_TO_UINT_SAT: | ||||
10532 | Res = LowerFP_TO_INT_SAT(SDValue(N, 0), DAG, Subtarget); | ||||
10533 | break; | ||||
10534 | } | ||||
10535 | if (Res.getNode()) | ||||
10536 | Results.push_back(Res); | ||||
10537 | } | ||||
10538 | |||||
10539 | //===----------------------------------------------------------------------===// | ||||
10540 | // ARM Scheduler Hooks | ||||
10541 | //===----------------------------------------------------------------------===// | ||||
10542 | |||||
10543 | /// SetupEntryBlockForSjLj - Insert code into the entry block that creates and | ||||
10544 | /// registers the function context. | ||||
10545 | void ARMTargetLowering::SetupEntryBlockForSjLj(MachineInstr &MI, | ||||
10546 | MachineBasicBlock *MBB, | ||||
10547 | MachineBasicBlock *DispatchBB, | ||||
10548 | int FI) const { | ||||
10549 | assert(!Subtarget->isROPI() && !Subtarget->isRWPI() &&(static_cast <bool> (!Subtarget->isROPI() && !Subtarget->isRWPI() && "ROPI/RWPI not currently supported with SjLj" ) ? void (0) : __assert_fail ("!Subtarget->isROPI() && !Subtarget->isRWPI() && \"ROPI/RWPI not currently supported with SjLj\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 10550, __extension__ __PRETTY_FUNCTION__)) | ||||
10550 | "ROPI/RWPI not currently supported with SjLj")(static_cast <bool> (!Subtarget->isROPI() && !Subtarget->isRWPI() && "ROPI/RWPI not currently supported with SjLj" ) ? void (0) : __assert_fail ("!Subtarget->isROPI() && !Subtarget->isRWPI() && \"ROPI/RWPI not currently supported with SjLj\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 10550, __extension__ __PRETTY_FUNCTION__)); | ||||
10551 | const TargetInstrInfo *TII = Subtarget->getInstrInfo(); | ||||
10552 | DebugLoc dl = MI.getDebugLoc(); | ||||
10553 | MachineFunction *MF = MBB->getParent(); | ||||
10554 | MachineRegisterInfo *MRI = &MF->getRegInfo(); | ||||
10555 | MachineConstantPool *MCP = MF->getConstantPool(); | ||||
10556 | ARMFunctionInfo *AFI = MF->getInfo<ARMFunctionInfo>(); | ||||
10557 | const Function &F = MF->getFunction(); | ||||
10558 | |||||
10559 | bool isThumb = Subtarget->isThumb(); | ||||
10560 | bool isThumb2 = Subtarget->isThumb2(); | ||||
10561 | |||||
10562 | unsigned PCLabelId = AFI->createPICLabelUId(); | ||||
10563 | unsigned PCAdj = (isThumb || isThumb2) ? 4 : 8; | ||||
10564 | ARMConstantPoolValue *CPV = | ||||
10565 | ARMConstantPoolMBB::Create(F.getContext(), DispatchBB, PCLabelId, PCAdj); | ||||
10566 | unsigned CPI = MCP->getConstantPoolIndex(CPV, Align(4)); | ||||
10567 | |||||
10568 | const TargetRegisterClass *TRC = isThumb ? &ARM::tGPRRegClass | ||||
10569 | : &ARM::GPRRegClass; | ||||
10570 | |||||
10571 | // Grab constant pool and fixed stack memory operands. | ||||
10572 | MachineMemOperand *CPMMO = | ||||
10573 | MF->getMachineMemOperand(MachinePointerInfo::getConstantPool(*MF), | ||||
10574 | MachineMemOperand::MOLoad, 4, Align(4)); | ||||
10575 | |||||
10576 | MachineMemOperand *FIMMOSt = | ||||
10577 | MF->getMachineMemOperand(MachinePointerInfo::getFixedStack(*MF, FI), | ||||
10578 | MachineMemOperand::MOStore, 4, Align(4)); | ||||
10579 | |||||
10580 | // Load the address of the dispatch MBB into the jump buffer. | ||||
10581 | if (isThumb2) { | ||||
10582 | // Incoming value: jbuf | ||||
10583 | // ldr.n r5, LCPI1_1 | ||||
10584 | // orr r5, r5, #1 | ||||
10585 | // add r5, pc | ||||
10586 | // str r5, [$jbuf, #+4] ; &jbuf[1] | ||||
10587 | Register NewVReg1 = MRI->createVirtualRegister(TRC); | ||||
10588 | BuildMI(*MBB, MI, dl, TII->get(ARM::t2LDRpci), NewVReg1) | ||||
10589 | .addConstantPoolIndex(CPI) | ||||
10590 | .addMemOperand(CPMMO) | ||||
10591 | .add(predOps(ARMCC::AL)); | ||||
10592 | // Set the low bit because of thumb mode. | ||||
10593 | Register NewVReg2 = MRI->createVirtualRegister(TRC); | ||||
10594 | BuildMI(*MBB, MI, dl, TII->get(ARM::t2ORRri), NewVReg2) | ||||
10595 | .addReg(NewVReg1, RegState::Kill) | ||||
10596 | .addImm(0x01) | ||||
10597 | .add(predOps(ARMCC::AL)) | ||||
10598 | .add(condCodeOp()); | ||||
10599 | Register NewVReg3 = MRI->createVirtualRegister(TRC); | ||||
10600 | BuildMI(*MBB, MI, dl, TII->get(ARM::tPICADD), NewVReg3) | ||||
10601 | .addReg(NewVReg2, RegState::Kill) | ||||
10602 | .addImm(PCLabelId); | ||||
10603 | BuildMI(*MBB, MI, dl, TII->get(ARM::t2STRi12)) | ||||
10604 | .addReg(NewVReg3, RegState::Kill) | ||||
10605 | .addFrameIndex(FI) | ||||
10606 | .addImm(36) // &jbuf[1] :: pc | ||||
10607 | .addMemOperand(FIMMOSt) | ||||
10608 | .add(predOps(ARMCC::AL)); | ||||
10609 | } else if (isThumb) { | ||||
10610 | // Incoming value: jbuf | ||||
10611 | // ldr.n r1, LCPI1_4 | ||||
10612 | // add r1, pc | ||||
10613 | // mov r2, #1 | ||||
10614 | // orrs r1, r2 | ||||
10615 | // add r2, $jbuf, #+4 ; &jbuf[1] | ||||
10616 | // str r1, [r2] | ||||
10617 | Register NewVReg1 = MRI->createVirtualRegister(TRC); | ||||
10618 | BuildMI(*MBB, MI, dl, TII->get(ARM::tLDRpci), NewVReg1) | ||||
10619 | .addConstantPoolIndex(CPI) | ||||
10620 | .addMemOperand(CPMMO) | ||||
10621 | .add(predOps(ARMCC::AL)); | ||||
10622 | Register NewVReg2 = MRI->createVirtualRegister(TRC); | ||||
10623 | BuildMI(*MBB, MI, dl, TII->get(ARM::tPICADD), NewVReg2) | ||||
10624 | .addReg(NewVReg1, RegState::Kill) | ||||
10625 | .addImm(PCLabelId); | ||||
10626 | // Set the low bit because of thumb mode. | ||||
10627 | Register NewVReg3 = MRI->createVirtualRegister(TRC); | ||||
10628 | BuildMI(*MBB, MI, dl, TII->get(ARM::tMOVi8), NewVReg3) | ||||
10629 | .addReg(ARM::CPSR, RegState::Define) | ||||
10630 | .addImm(1) | ||||
10631 | .add(predOps(ARMCC::AL)); | ||||
10632 | Register NewVReg4 = MRI->createVirtualRegister(TRC); | ||||
10633 | BuildMI(*MBB, MI, dl, TII->get(ARM::tORR), NewVReg4) | ||||
10634 | .addReg(ARM::CPSR, RegState::Define) | ||||
10635 | .addReg(NewVReg2, RegState::Kill) | ||||
10636 | .addReg(NewVReg3, RegState::Kill) | ||||
10637 | .add(predOps(ARMCC::AL)); | ||||
10638 | Register NewVReg5 = MRI->createVirtualRegister(TRC); | ||||
10639 | BuildMI(*MBB, MI, dl, TII->get(ARM::tADDframe), NewVReg5) | ||||
10640 | .addFrameIndex(FI) | ||||
10641 | .addImm(36); // &jbuf[1] :: pc | ||||
10642 | BuildMI(*MBB, MI, dl, TII->get(ARM::tSTRi)) | ||||
10643 | .addReg(NewVReg4, RegState::Kill) | ||||
10644 | .addReg(NewVReg5, RegState::Kill) | ||||
10645 | .addImm(0) | ||||
10646 | .addMemOperand(FIMMOSt) | ||||
10647 | .add(predOps(ARMCC::AL)); | ||||
10648 | } else { | ||||
10649 | // Incoming value: jbuf | ||||
10650 | // ldr r1, LCPI1_1 | ||||
10651 | // add r1, pc, r1 | ||||
10652 | // str r1, [$jbuf, #+4] ; &jbuf[1] | ||||
10653 | Register NewVReg1 = MRI->createVirtualRegister(TRC); | ||||
10654 | BuildMI(*MBB, MI, dl, TII->get(ARM::LDRi12), NewVReg1) | ||||
10655 | .addConstantPoolIndex(CPI) | ||||
10656 | .addImm(0) | ||||
10657 | .addMemOperand(CPMMO) | ||||
10658 | .add(predOps(ARMCC::AL)); | ||||
10659 | Register NewVReg2 = MRI->createVirtualRegister(TRC); | ||||
10660 | BuildMI(*MBB, MI, dl, TII->get(ARM::PICADD), NewVReg2) | ||||
10661 | .addReg(NewVReg1, RegState::Kill) | ||||
10662 | .addImm(PCLabelId) | ||||
10663 | .add(predOps(ARMCC::AL)); | ||||
10664 | BuildMI(*MBB, MI, dl, TII->get(ARM::STRi12)) | ||||
10665 | .addReg(NewVReg2, RegState::Kill) | ||||
10666 | .addFrameIndex(FI) | ||||
10667 | .addImm(36) // &jbuf[1] :: pc | ||||
10668 | .addMemOperand(FIMMOSt) | ||||
10669 | .add(predOps(ARMCC::AL)); | ||||
10670 | } | ||||
10671 | } | ||||
10672 | |||||
10673 | void ARMTargetLowering::EmitSjLjDispatchBlock(MachineInstr &MI, | ||||
10674 | MachineBasicBlock *MBB) const { | ||||
10675 | const TargetInstrInfo *TII = Subtarget->getInstrInfo(); | ||||
10676 | DebugLoc dl = MI.getDebugLoc(); | ||||
10677 | MachineFunction *MF = MBB->getParent(); | ||||
10678 | MachineRegisterInfo *MRI = &MF->getRegInfo(); | ||||
10679 | MachineFrameInfo &MFI = MF->getFrameInfo(); | ||||
10680 | int FI = MFI.getFunctionContextIndex(); | ||||
10681 | |||||
10682 | const TargetRegisterClass *TRC = Subtarget->isThumb() ? &ARM::tGPRRegClass | ||||
10683 | : &ARM::GPRnopcRegClass; | ||||
10684 | |||||
10685 | // Get a mapping of the call site numbers to all of the landing pads they're | ||||
10686 | // associated with. | ||||
10687 | DenseMap<unsigned, SmallVector<MachineBasicBlock*, 2>> CallSiteNumToLPad; | ||||
10688 | unsigned MaxCSNum = 0; | ||||
10689 | for (MachineBasicBlock &BB : *MF) { | ||||
10690 | if (!BB.isEHPad()) | ||||
10691 | continue; | ||||
10692 | |||||
10693 | // FIXME: We should assert that the EH_LABEL is the first MI in the landing | ||||
10694 | // pad. | ||||
10695 | for (MachineInstr &II : BB) { | ||||
10696 | if (!II.isEHLabel()) | ||||
10697 | continue; | ||||
10698 | |||||
10699 | MCSymbol *Sym = II.getOperand(0).getMCSymbol(); | ||||
10700 | if (!MF->hasCallSiteLandingPad(Sym)) continue; | ||||
10701 | |||||
10702 | SmallVectorImpl<unsigned> &CallSiteIdxs = MF->getCallSiteLandingPad(Sym); | ||||
10703 | for (unsigned Idx : CallSiteIdxs) { | ||||
10704 | CallSiteNumToLPad[Idx].push_back(&BB); | ||||
10705 | MaxCSNum = std::max(MaxCSNum, Idx); | ||||
10706 | } | ||||
10707 | break; | ||||
10708 | } | ||||
10709 | } | ||||
10710 | |||||
10711 | // Get an ordered list of the machine basic blocks for the jump table. | ||||
10712 | std::vector<MachineBasicBlock*> LPadList; | ||||
10713 | SmallPtrSet<MachineBasicBlock*, 32> InvokeBBs; | ||||
10714 | LPadList.reserve(CallSiteNumToLPad.size()); | ||||
10715 | for (unsigned I = 1; I <= MaxCSNum; ++I) { | ||||
10716 | SmallVectorImpl<MachineBasicBlock*> &MBBList = CallSiteNumToLPad[I]; | ||||
10717 | for (MachineBasicBlock *MBB : MBBList) { | ||||
10718 | LPadList.push_back(MBB); | ||||
10719 | InvokeBBs.insert(MBB->pred_begin(), MBB->pred_end()); | ||||
10720 | } | ||||
10721 | } | ||||
10722 | |||||
10723 | 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!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 10724, __extension__ __PRETTY_FUNCTION__)) | ||||
10724 | "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!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 10724, __extension__ __PRETTY_FUNCTION__)); | ||||
10725 | |||||
10726 | // Create the jump table and associated information. | ||||
10727 | MachineJumpTableInfo *JTI = | ||||
10728 | MF->getOrCreateJumpTableInfo(MachineJumpTableInfo::EK_Inline); | ||||
10729 | unsigned MJTI = JTI->createJumpTableIndex(LPadList); | ||||
10730 | |||||
10731 | // Create the MBBs for the dispatch code. | ||||
10732 | |||||
10733 | // Shove the dispatch's address into the return slot in the function context. | ||||
10734 | MachineBasicBlock *DispatchBB = MF->CreateMachineBasicBlock(); | ||||
10735 | DispatchBB->setIsEHPad(); | ||||
10736 | |||||
10737 | MachineBasicBlock *TrapBB = MF->CreateMachineBasicBlock(); | ||||
10738 | unsigned trap_opcode; | ||||
10739 | if (Subtarget->isThumb()) | ||||
10740 | trap_opcode = ARM::tTRAP; | ||||
10741 | else | ||||
10742 | trap_opcode = Subtarget->useNaClTrap() ? ARM::TRAPNaCl : ARM::TRAP; | ||||
10743 | |||||
10744 | BuildMI(TrapBB, dl, TII->get(trap_opcode)); | ||||
10745 | DispatchBB->addSuccessor(TrapBB); | ||||
10746 | |||||
10747 | MachineBasicBlock *DispContBB = MF->CreateMachineBasicBlock(); | ||||
10748 | DispatchBB->addSuccessor(DispContBB); | ||||
10749 | |||||
10750 | // Insert and MBBs. | ||||
10751 | MF->insert(MF->end(), DispatchBB); | ||||
10752 | MF->insert(MF->end(), DispContBB); | ||||
10753 | MF->insert(MF->end(), TrapBB); | ||||
10754 | |||||
10755 | // Insert code into the entry block that creates and registers the function | ||||
10756 | // context. | ||||
10757 | SetupEntryBlockForSjLj(MI, MBB, DispatchBB, FI); | ||||
10758 | |||||
10759 | MachineMemOperand *FIMMOLd = MF->getMachineMemOperand( | ||||
10760 | MachinePointerInfo::getFixedStack(*MF, FI), | ||||
10761 | MachineMemOperand::MOLoad | MachineMemOperand::MOVolatile, 4, Align(4)); | ||||
10762 | |||||
10763 | MachineInstrBuilder MIB; | ||||
10764 | MIB = BuildMI(DispatchBB, dl, TII->get(ARM::Int_eh_sjlj_dispatchsetup)); | ||||
10765 | |||||
10766 | const ARMBaseInstrInfo *AII = static_cast<const ARMBaseInstrInfo*>(TII); | ||||
10767 | const ARMBaseRegisterInfo &RI = AII->getRegisterInfo(); | ||||
10768 | |||||
10769 | // Add a register mask with no preserved registers. This results in all | ||||
10770 | // registers being marked as clobbered. This can't work if the dispatch block | ||||
10771 | // is in a Thumb1 function and is linked with ARM code which uses the FP | ||||
10772 | // registers, as there is no way to preserve the FP registers in Thumb1 mode. | ||||
10773 | MIB.addRegMask(RI.getSjLjDispatchPreservedMask(*MF)); | ||||
10774 | |||||
10775 | bool IsPositionIndependent = isPositionIndependent(); | ||||
10776 | unsigned NumLPads = LPadList.size(); | ||||
10777 | if (Subtarget->isThumb2()) { | ||||
10778 | Register NewVReg1 = MRI->createVirtualRegister(TRC); | ||||
10779 | BuildMI(DispatchBB, dl, TII->get(ARM::t2LDRi12), NewVReg1) | ||||
10780 | .addFrameIndex(FI) | ||||
10781 | .addImm(4) | ||||
10782 | .addMemOperand(FIMMOLd) | ||||
10783 | .add(predOps(ARMCC::AL)); | ||||
10784 | |||||
10785 | if (NumLPads < 256) { | ||||
10786 | BuildMI(DispatchBB, dl, TII->get(ARM::t2CMPri)) | ||||
10787 | .addReg(NewVReg1) | ||||
10788 | .addImm(LPadList.size()) | ||||
10789 | .add(predOps(ARMCC::AL)); | ||||
10790 | } else { | ||||
10791 | Register VReg1 = MRI->createVirtualRegister(TRC); | ||||
10792 | BuildMI(DispatchBB, dl, TII->get(ARM::t2MOVi16), VReg1) | ||||
10793 | .addImm(NumLPads & 0xFFFF) | ||||
10794 | .add(predOps(ARMCC::AL)); | ||||
10795 | |||||
10796 | unsigned VReg2 = VReg1; | ||||
10797 | if ((NumLPads & 0xFFFF0000) != 0) { | ||||
10798 | VReg2 = MRI->createVirtualRegister(TRC); | ||||
10799 | BuildMI(DispatchBB, dl, TII->get(ARM::t2MOVTi16), VReg2) | ||||
10800 | .addReg(VReg1) | ||||
10801 | .addImm(NumLPads >> 16) | ||||
10802 | .add(predOps(ARMCC::AL)); | ||||
10803 | } | ||||
10804 | |||||
10805 | BuildMI(DispatchBB, dl, TII->get(ARM::t2CMPrr)) | ||||
10806 | .addReg(NewVReg1) | ||||
10807 | .addReg(VReg2) | ||||
10808 | .add(predOps(ARMCC::AL)); | ||||
10809 | } | ||||
10810 | |||||
10811 | BuildMI(DispatchBB, dl, TII->get(ARM::t2Bcc)) | ||||
10812 | .addMBB(TrapBB) | ||||
10813 | .addImm(ARMCC::HI) | ||||
10814 | .addReg(ARM::CPSR); | ||||
10815 | |||||
10816 | Register NewVReg3 = MRI->createVirtualRegister(TRC); | ||||
10817 | BuildMI(DispContBB, dl, TII->get(ARM::t2LEApcrelJT), NewVReg3) | ||||
10818 | .addJumpTableIndex(MJTI) | ||||
10819 | .add(predOps(ARMCC::AL)); | ||||
10820 | |||||
10821 | Register NewVReg4 = MRI->createVirtualRegister(TRC); | ||||
10822 | BuildMI(DispContBB, dl, TII->get(ARM::t2ADDrs), NewVReg4) | ||||
10823 | .addReg(NewVReg3, RegState::Kill) | ||||
10824 | .addReg(NewVReg1) | ||||
10825 | .addImm(ARM_AM::getSORegOpc(ARM_AM::lsl, 2)) | ||||
10826 | .add(predOps(ARMCC::AL)) | ||||
10827 | .add(condCodeOp()); | ||||
10828 | |||||
10829 | BuildMI(DispContBB, dl, TII->get(ARM::t2BR_JT)) | ||||
10830 | .addReg(NewVReg4, RegState::Kill) | ||||
10831 | .addReg(NewVReg1) | ||||
10832 | .addJumpTableIndex(MJTI); | ||||
10833 | } else if (Subtarget->isThumb()) { | ||||
10834 | Register NewVReg1 = MRI->createVirtualRegister(TRC); | ||||
10835 | BuildMI(DispatchBB, dl, TII->get(ARM::tLDRspi), NewVReg1) | ||||
10836 | .addFrameIndex(FI) | ||||
10837 | .addImm(1) | ||||
10838 | .addMemOperand(FIMMOLd) | ||||
10839 | .add(predOps(ARMCC::AL)); | ||||
10840 | |||||
10841 | if (NumLPads < 256) { | ||||
10842 | BuildMI(DispatchBB, dl, TII->get(ARM::tCMPi8)) | ||||
10843 | .addReg(NewVReg1) | ||||
10844 | .addImm(NumLPads) | ||||
10845 | .add(predOps(ARMCC::AL)); | ||||
10846 | } else { | ||||
10847 | MachineConstantPool *ConstantPool = MF->getConstantPool(); | ||||
10848 | Type *Int32Ty = Type::getInt32Ty(MF->getFunction().getContext()); | ||||
10849 | const Constant *C = ConstantInt::get(Int32Ty, NumLPads); | ||||
10850 | |||||
10851 | // MachineConstantPool wants an explicit alignment. | ||||
10852 | Align Alignment = MF->getDataLayout().getPrefTypeAlign(Int32Ty); | ||||
10853 | unsigned Idx = ConstantPool->getConstantPoolIndex(C, Alignment); | ||||
10854 | |||||
10855 | Register VReg1 = MRI->createVirtualRegister(TRC); | ||||
10856 | BuildMI(DispatchBB, dl, TII->get(ARM::tLDRpci)) | ||||
10857 | .addReg(VReg1, RegState::Define) | ||||
10858 | .addConstantPoolIndex(Idx) | ||||
10859 | .add(predOps(ARMCC::AL)); | ||||
10860 | BuildMI(DispatchBB, dl, TII->get(ARM::tCMPr)) | ||||
10861 | .addReg(NewVReg1) | ||||
10862 | .addReg(VReg1) | ||||
10863 | .add(predOps(ARMCC::AL)); | ||||
10864 | } | ||||
10865 | |||||
10866 | BuildMI(DispatchBB, dl, TII->get(ARM::tBcc)) | ||||
10867 | .addMBB(TrapBB) | ||||
10868 | .addImm(ARMCC::HI) | ||||
10869 | .addReg(ARM::CPSR); | ||||
10870 | |||||
10871 | Register NewVReg2 = MRI->createVirtualRegister(TRC); | ||||
10872 | BuildMI(DispContBB, dl, TII->get(ARM::tLSLri), NewVReg2) | ||||
10873 | .addReg(ARM::CPSR, RegState::Define) | ||||
10874 | .addReg(NewVReg1) | ||||
10875 | .addImm(2) | ||||
10876 | .add(predOps(ARMCC::AL)); | ||||
10877 | |||||
10878 | Register NewVReg3 = MRI->createVirtualRegister(TRC); | ||||
10879 | BuildMI(DispContBB, dl, TII->get(ARM::tLEApcrelJT), NewVReg3) | ||||
10880 | .addJumpTableIndex(MJTI) | ||||
10881 | .add(predOps(ARMCC::AL)); | ||||
10882 | |||||
10883 | Register NewVReg4 = MRI->createVirtualRegister(TRC); | ||||
10884 | BuildMI(DispContBB, dl, TII->get(ARM::tADDrr), NewVReg4) | ||||
10885 | .addReg(ARM::CPSR, RegState::Define) | ||||
10886 | .addReg(NewVReg2, RegState::Kill) | ||||
10887 | .addReg(NewVReg3) | ||||
10888 | .add(predOps(ARMCC::AL)); | ||||
10889 | |||||
10890 | MachineMemOperand *JTMMOLd = | ||||
10891 | MF->getMachineMemOperand(MachinePointerInfo::getJumpTable(*MF), | ||||
10892 | MachineMemOperand::MOLoad, 4, Align(4)); | ||||
10893 | |||||
10894 | Register NewVReg5 = MRI->createVirtualRegister(TRC); | ||||
10895 | BuildMI(DispContBB, dl, TII->get(ARM::tLDRi), NewVReg5) | ||||
10896 | .addReg(NewVReg4, RegState::Kill) | ||||
10897 | .addImm(0) | ||||
10898 | .addMemOperand(JTMMOLd) | ||||
10899 | .add(predOps(ARMCC::AL)); | ||||
10900 | |||||
10901 | unsigned NewVReg6 = NewVReg5; | ||||
10902 | if (IsPositionIndependent) { | ||||
10903 | NewVReg6 = MRI->createVirtualRegister(TRC); | ||||
10904 | BuildMI(DispContBB, dl, TII->get(ARM::tADDrr), NewVReg6) | ||||
10905 | .addReg(ARM::CPSR, RegState::Define) | ||||
10906 | .addReg(NewVReg5, RegState::Kill) | ||||
10907 | .addReg(NewVReg3) | ||||
10908 | .add(predOps(ARMCC::AL)); | ||||
10909 | } | ||||
10910 | |||||
10911 | BuildMI(DispContBB, dl, TII->get(ARM::tBR_JTr)) | ||||
10912 | .addReg(NewVReg6, RegState::Kill) | ||||
10913 | .addJumpTableIndex(MJTI); | ||||
10914 | } else { | ||||
10915 | Register NewVReg1 = MRI->createVirtualRegister(TRC); | ||||
10916 | BuildMI(DispatchBB, dl, TII->get(ARM::LDRi12), NewVReg1) | ||||
10917 | .addFrameIndex(FI) | ||||
10918 | .addImm(4) | ||||
10919 | .addMemOperand(FIMMOLd) | ||||
10920 | .add(predOps(ARMCC::AL)); | ||||
10921 | |||||
10922 | if (NumLPads < 256) { | ||||
10923 | BuildMI(DispatchBB, dl, TII->get(ARM::CMPri)) | ||||
10924 | .addReg(NewVReg1) | ||||
10925 | .addImm(NumLPads) | ||||
10926 | .add(predOps(ARMCC::AL)); | ||||
10927 | } else if (Subtarget->hasV6T2Ops() && isUInt<16>(NumLPads)) { | ||||
10928 | Register VReg1 = MRI->createVirtualRegister(TRC); | ||||
10929 | BuildMI(DispatchBB, dl, TII->get(ARM::MOVi16), VReg1) | ||||
10930 | .addImm(NumLPads & 0xFFFF) | ||||
10931 | .add(predOps(ARMCC::AL)); | ||||
10932 | |||||
10933 | unsigned VReg2 = VReg1; | ||||
10934 | if ((NumLPads & 0xFFFF0000) != 0) { | ||||
10935 | VReg2 = MRI->createVirtualRegister(TRC); | ||||
10936 | BuildMI(DispatchBB, dl, TII->get(ARM::MOVTi16), VReg2) | ||||
10937 | .addReg(VReg1) | ||||
10938 | .addImm(NumLPads >> 16) | ||||
10939 | .add(predOps(ARMCC::AL)); | ||||
10940 | } | ||||
10941 | |||||
10942 | BuildMI(DispatchBB, dl, TII->get(ARM::CMPrr)) | ||||
10943 | .addReg(NewVReg1) | ||||
10944 | .addReg(VReg2) | ||||
10945 | .add(predOps(ARMCC::AL)); | ||||
10946 | } else { | ||||
10947 | MachineConstantPool *ConstantPool = MF->getConstantPool(); | ||||
10948 | Type *Int32Ty = Type::getInt32Ty(MF->getFunction().getContext()); | ||||
10949 | const Constant *C = ConstantInt::get(Int32Ty, NumLPads); | ||||
10950 | |||||
10951 | // MachineConstantPool wants an explicit alignment. | ||||
10952 | Align Alignment = MF->getDataLayout().getPrefTypeAlign(Int32Ty); | ||||
10953 | unsigned Idx = ConstantPool->getConstantPoolIndex(C, Alignment); | ||||
10954 | |||||
10955 | Register VReg1 = MRI->createVirtualRegister(TRC); | ||||
10956 | BuildMI(DispatchBB, dl, TII->get(ARM::LDRcp)) | ||||
10957 | .addReg(VReg1, RegState::Define) | ||||
10958 | .addConstantPoolIndex(Idx) | ||||
10959 | .addImm(0) | ||||
10960 | .add(predOps(ARMCC::AL)); | ||||
10961 | BuildMI(DispatchBB, dl, TII->get(ARM::CMPrr)) | ||||
10962 | .addReg(NewVReg1) | ||||
10963 | .addReg(VReg1, RegState::Kill) | ||||
10964 | .add(predOps(ARMCC::AL)); | ||||
10965 | } | ||||
10966 | |||||
10967 | BuildMI(DispatchBB, dl, TII->get(ARM::Bcc)) | ||||
10968 | .addMBB(TrapBB) | ||||
10969 | .addImm(ARMCC::HI) | ||||
10970 | .addReg(ARM::CPSR); | ||||
10971 | |||||
10972 | Register NewVReg3 = MRI->createVirtualRegister(TRC); | ||||
10973 | BuildMI(DispContBB, dl, TII->get(ARM::MOVsi), NewVReg3) | ||||
10974 | .addReg(NewVReg1) | ||||
10975 | .addImm(ARM_AM::getSORegOpc(ARM_AM::lsl, 2)) | ||||
10976 | .add(predOps(ARMCC::AL)) | ||||
10977 | .add(condCodeOp()); | ||||
10978 | Register NewVReg4 = MRI->createVirtualRegister(TRC); | ||||
10979 | BuildMI(DispContBB, dl, TII->get(ARM::LEApcrelJT), NewVReg4) | ||||
10980 | .addJumpTableIndex(MJTI) | ||||
10981 | .add(predOps(ARMCC::AL)); | ||||
10982 | |||||
10983 | MachineMemOperand *JTMMOLd = | ||||
10984 | MF->getMachineMemOperand(MachinePointerInfo::getJumpTable(*MF), | ||||
10985 | MachineMemOperand::MOLoad, 4, Align(4)); | ||||
10986 | Register NewVReg5 = MRI->createVirtualRegister(TRC); | ||||
10987 | BuildMI(DispContBB, dl, TII->get(ARM::LDRrs), NewVReg5) | ||||
10988 | .addReg(NewVReg3, RegState::Kill) | ||||
10989 | .addReg(NewVReg4) | ||||
10990 | .addImm(0) | ||||
10991 | .addMemOperand(JTMMOLd) | ||||
10992 | .add(predOps(ARMCC::AL)); | ||||
10993 | |||||
10994 | if (IsPositionIndependent) { | ||||
10995 | BuildMI(DispContBB, dl, TII->get(ARM::BR_JTadd)) | ||||
10996 | .addReg(NewVReg5, RegState::Kill) | ||||
10997 | .addReg(NewVReg4) | ||||
10998 | .addJumpTableIndex(MJTI); | ||||
10999 | } else { | ||||
11000 | BuildMI(DispContBB, dl, TII->get(ARM::BR_JTr)) | ||||
11001 | .addReg(NewVReg5, RegState::Kill) | ||||
11002 | .addJumpTableIndex(MJTI); | ||||
11003 | } | ||||
11004 | } | ||||
11005 | |||||
11006 | // Add the jump table entries as successors to the MBB. | ||||
11007 | SmallPtrSet<MachineBasicBlock*, 8> SeenMBBs; | ||||
11008 | for (MachineBasicBlock *CurMBB : LPadList) { | ||||
11009 | if (SeenMBBs.insert(CurMBB).second) | ||||
11010 | DispContBB->addSuccessor(CurMBB); | ||||
11011 | } | ||||
11012 | |||||
11013 | // N.B. the order the invoke BBs are processed in doesn't matter here. | ||||
11014 | const MCPhysReg *SavedRegs = RI.getCalleeSavedRegs(MF); | ||||
11015 | SmallVector<MachineBasicBlock*, 64> MBBLPads; | ||||
11016 | for (MachineBasicBlock *BB : InvokeBBs) { | ||||
11017 | |||||
11018 | // Remove the landing pad successor from the invoke block and replace it | ||||
11019 | // with the new dispatch block. | ||||
11020 | SmallVector<MachineBasicBlock*, 4> Successors(BB->successors()); | ||||
11021 | while (!Successors.empty()) { | ||||
11022 | MachineBasicBlock *SMBB = Successors.pop_back_val(); | ||||
11023 | if (SMBB->isEHPad()) { | ||||
11024 | BB->removeSuccessor(SMBB); | ||||
11025 | MBBLPads.push_back(SMBB); | ||||
11026 | } | ||||
11027 | } | ||||
11028 | |||||
11029 | BB->addSuccessor(DispatchBB, BranchProbability::getZero()); | ||||
11030 | BB->normalizeSuccProbs(); | ||||
11031 | |||||
11032 | // Find the invoke call and mark all of the callee-saved registers as | ||||
11033 | // 'implicit defined' so that they're spilled. This prevents code from | ||||
11034 | // moving instructions to before the EH block, where they will never be | ||||
11035 | // executed. | ||||
11036 | for (MachineBasicBlock::reverse_iterator | ||||
11037 | II = BB->rbegin(), IE = BB->rend(); II != IE; ++II) { | ||||
11038 | if (!II->isCall()) continue; | ||||
11039 | |||||
11040 | DenseMap<unsigned, bool> DefRegs; | ||||
11041 | for (MachineInstr::mop_iterator | ||||
11042 | OI = II->operands_begin(), OE = II->operands_end(); | ||||
11043 | OI != OE; ++OI) { | ||||
11044 | if (!OI->isReg()) continue; | ||||
11045 | DefRegs[OI->getReg()] = true; | ||||
11046 | } | ||||
11047 | |||||
11048 | MachineInstrBuilder MIB(*MF, &*II); | ||||
11049 | |||||
11050 | for (unsigned i = 0; SavedRegs[i] != 0; ++i) { | ||||
11051 | unsigned Reg = SavedRegs[i]; | ||||
11052 | if (Subtarget->isThumb2() && | ||||
11053 | !ARM::tGPRRegClass.contains(Reg) && | ||||
11054 | !ARM::hGPRRegClass.contains(Reg)) | ||||
11055 | continue; | ||||
11056 | if (Subtarget->isThumb1Only() && !ARM::tGPRRegClass.contains(Reg)) | ||||
11057 | continue; | ||||
11058 | if (!Subtarget->isThumb() && !ARM::GPRRegClass.contains(Reg)) | ||||
11059 | continue; | ||||
11060 | if (!DefRegs[Reg]) | ||||
11061 | MIB.addReg(Reg, RegState::ImplicitDefine | RegState::Dead); | ||||
11062 | } | ||||
11063 | |||||
11064 | break; | ||||
11065 | } | ||||
11066 | } | ||||
11067 | |||||
11068 | // Mark all former landing pads as non-landing pads. The dispatch is the only | ||||
11069 | // landing pad now. | ||||
11070 | for (MachineBasicBlock *MBBLPad : MBBLPads) | ||||
11071 | MBBLPad->setIsEHPad(false); | ||||
11072 | |||||
11073 | // The instruction is gone now. | ||||
11074 | MI.eraseFromParent(); | ||||
11075 | } | ||||
11076 | |||||
11077 | static | ||||
11078 | MachineBasicBlock *OtherSucc(MachineBasicBlock *MBB, MachineBasicBlock *Succ) { | ||||
11079 | for (MachineBasicBlock *S : MBB->successors()) | ||||
11080 | if (S != Succ) | ||||
11081 | return S; | ||||
11082 | llvm_unreachable("Expecting a BB with two successors!")::llvm::llvm_unreachable_internal("Expecting a BB with two successors!" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 11082); | ||||
11083 | } | ||||
11084 | |||||
11085 | /// Return the load opcode for a given load size. If load size >= 8, | ||||
11086 | /// neon opcode will be returned. | ||||
11087 | static unsigned getLdOpcode(unsigned LdSize, bool IsThumb1, bool IsThumb2) { | ||||
11088 | if (LdSize >= 8) | ||||
11089 | return LdSize == 16 ? ARM::VLD1q32wb_fixed | ||||
11090 | : LdSize == 8 ? ARM::VLD1d32wb_fixed : 0; | ||||
11091 | if (IsThumb1) | ||||
11092 | return LdSize == 4 ? ARM::tLDRi | ||||
11093 | : LdSize == 2 ? ARM::tLDRHi | ||||
11094 | : LdSize == 1 ? ARM::tLDRBi : 0; | ||||
11095 | if (IsThumb2) | ||||
11096 | return LdSize == 4 ? ARM::t2LDR_POST | ||||
11097 | : LdSize == 2 ? ARM::t2LDRH_POST | ||||
11098 | : LdSize == 1 ? ARM::t2LDRB_POST : 0; | ||||
11099 | return LdSize == 4 ? ARM::LDR_POST_IMM | ||||
11100 | : LdSize == 2 ? ARM::LDRH_POST | ||||
11101 | : LdSize == 1 ? ARM::LDRB_POST_IMM : 0; | ||||
11102 | } | ||||
11103 | |||||
11104 | /// Return the store opcode for a given store size. If store size >= 8, | ||||
11105 | /// neon opcode will be returned. | ||||
11106 | static unsigned getStOpcode(unsigned StSize, bool IsThumb1, bool IsThumb2) { | ||||
11107 | if (StSize >= 8) | ||||
11108 | return StSize == 16 ? ARM::VST1q32wb_fixed | ||||
11109 | : StSize == 8 ? ARM::VST1d32wb_fixed : 0; | ||||
11110 | if (IsThumb1) | ||||
11111 | return StSize == 4 ? ARM::tSTRi | ||||
11112 | : StSize == 2 ? ARM::tSTRHi | ||||
11113 | : StSize == 1 ? ARM::tSTRBi : 0; | ||||
11114 | if (IsThumb2) | ||||
11115 | return StSize == 4 ? ARM::t2STR_POST | ||||
11116 | : StSize == 2 ? ARM::t2STRH_POST | ||||
11117 | : StSize == 1 ? ARM::t2STRB_POST : 0; | ||||
11118 | return StSize == 4 ? ARM::STR_POST_IMM | ||||
11119 | : StSize == 2 ? ARM::STRH_POST | ||||
11120 | : StSize == 1 ? ARM::STRB_POST_IMM : 0; | ||||
11121 | } | ||||
11122 | |||||
11123 | /// Emit a post-increment load operation with given size. The instructions | ||||
11124 | /// will be added to BB at Pos. | ||||
11125 | static void emitPostLd(MachineBasicBlock *BB, MachineBasicBlock::iterator Pos, | ||||
11126 | const TargetInstrInfo *TII, const DebugLoc &dl, | ||||
11127 | unsigned LdSize, unsigned Data, unsigned AddrIn, | ||||
11128 | unsigned AddrOut, bool IsThumb1, bool IsThumb2) { | ||||
11129 | unsigned LdOpc = getLdOpcode(LdSize, IsThumb1, IsThumb2); | ||||
11130 | assert(LdOpc != 0 && "Should have a load opcode")(static_cast <bool> (LdOpc != 0 && "Should have a load opcode" ) ? void (0) : __assert_fail ("LdOpc != 0 && \"Should have a load opcode\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 11130, __extension__ __PRETTY_FUNCTION__)); | ||||
11131 | if (LdSize >= 8) { | ||||
11132 | BuildMI(*BB, Pos, dl, TII->get(LdOpc), Data) | ||||
11133 | .addReg(AddrOut, RegState::Define) | ||||
11134 | .addReg(AddrIn) | ||||
11135 | .addImm(0) | ||||
11136 | .add(predOps(ARMCC::AL)); | ||||
11137 | } else if (IsThumb1) { | ||||
11138 | // load + update AddrIn | ||||
11139 | BuildMI(*BB, Pos, dl, TII->get(LdOpc), Data) | ||||
11140 | .addReg(AddrIn) | ||||
11141 | .addImm(0) | ||||
11142 | .add(predOps(ARMCC::AL)); | ||||
11143 | BuildMI(*BB, Pos, dl, TII->get(ARM::tADDi8), AddrOut) | ||||
11144 | .add(t1CondCodeOp()) | ||||
11145 | .addReg(AddrIn) | ||||
11146 | .addImm(LdSize) | ||||
11147 | .add(predOps(ARMCC::AL)); | ||||
11148 | } else if (IsThumb2) { | ||||
11149 | BuildMI(*BB, Pos, dl, TII->get(LdOpc), Data) | ||||
11150 | .addReg(AddrOut, RegState::Define) | ||||
11151 | .addReg(AddrIn) | ||||
11152 | .addImm(LdSize) | ||||
11153 | .add(predOps(ARMCC::AL)); | ||||
11154 | } else { // arm | ||||
11155 | BuildMI(*BB, Pos, dl, TII->get(LdOpc), Data) | ||||
11156 | .addReg(AddrOut, RegState::Define) | ||||
11157 | .addReg(AddrIn) | ||||
11158 | .addReg(0) | ||||
11159 | .addImm(LdSize) | ||||
11160 | .add(predOps(ARMCC::AL)); | ||||
11161 | } | ||||
11162 | } | ||||
11163 | |||||
11164 | /// Emit a post-increment store operation with given size. The instructions | ||||
11165 | /// will be added to BB at Pos. | ||||
11166 | static void emitPostSt(MachineBasicBlock *BB, MachineBasicBlock::iterator Pos, | ||||
11167 | const TargetInstrInfo *TII, const DebugLoc &dl, | ||||
11168 | unsigned StSize, unsigned Data, unsigned AddrIn, | ||||
11169 | unsigned AddrOut, bool IsThumb1, bool IsThumb2) { | ||||
11170 | unsigned StOpc = getStOpcode(StSize, IsThumb1, IsThumb2); | ||||
11171 | assert(StOpc != 0 && "Should have a store opcode")(static_cast <bool> (StOpc != 0 && "Should have a store opcode" ) ? void (0) : __assert_fail ("StOpc != 0 && \"Should have a store opcode\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 11171, __extension__ __PRETTY_FUNCTION__)); | ||||
11172 | if (StSize >= 8) { | ||||
11173 | BuildMI(*BB, Pos, dl, TII->get(StOpc), AddrOut) | ||||
11174 | .addReg(AddrIn) | ||||
11175 | .addImm(0) | ||||
11176 | .addReg(Data) | ||||
11177 | .add(predOps(ARMCC::AL)); | ||||
11178 | } else if (IsThumb1) { | ||||
11179 | // store + update AddrIn | ||||
11180 | BuildMI(*BB, Pos, dl, TII->get(StOpc)) | ||||
11181 | .addReg(Data) | ||||
11182 | .addReg(AddrIn) | ||||
11183 | .addImm(0) | ||||
11184 | .add(predOps(ARMCC::AL)); | ||||
11185 | BuildMI(*BB, Pos, dl, TII->get(ARM::tADDi8), AddrOut) | ||||
11186 | .add(t1CondCodeOp()) | ||||
11187 | .addReg(AddrIn) | ||||
11188 | .addImm(StSize) | ||||
11189 | .add(predOps(ARMCC::AL)); | ||||
11190 | } else if (IsThumb2) { | ||||
11191 | BuildMI(*BB, Pos, dl, TII->get(StOpc), AddrOut) | ||||
11192 | .addReg(Data) | ||||
11193 | .addReg(AddrIn) | ||||
11194 | .addImm(StSize) | ||||
11195 | .add(predOps(ARMCC::AL)); | ||||
11196 | } else { // arm | ||||
11197 | BuildMI(*BB, Pos, dl, TII->get(StOpc), AddrOut) | ||||
11198 | .addReg(Data) | ||||
11199 | .addReg(AddrIn) | ||||
11200 | .addReg(0) | ||||
11201 | .addImm(StSize) | ||||
11202 | .add(predOps(ARMCC::AL)); | ||||
11203 | } | ||||
11204 | } | ||||
11205 | |||||
11206 | MachineBasicBlock * | ||||
11207 | ARMTargetLowering::EmitStructByval(MachineInstr &MI, | ||||
11208 | MachineBasicBlock *BB) const { | ||||
11209 | // This pseudo instruction has 3 operands: dst, src, size | ||||
11210 | // We expand it to a loop if size > Subtarget->getMaxInlineSizeThreshold(). | ||||
11211 | // Otherwise, we will generate unrolled scalar copies. | ||||
11212 | const TargetInstrInfo *TII = Subtarget->getInstrInfo(); | ||||
11213 | const BasicBlock *LLVM_BB = BB->getBasicBlock(); | ||||
11214 | MachineFunction::iterator It = ++BB->getIterator(); | ||||
11215 | |||||
11216 | Register dest = MI.getOperand(0).getReg(); | ||||
11217 | Register src = MI.getOperand(1).getReg(); | ||||
11218 | unsigned SizeVal = MI.getOperand(2).getImm(); | ||||
11219 | unsigned Alignment = MI.getOperand(3).getImm(); | ||||
11220 | DebugLoc dl = MI.getDebugLoc(); | ||||
11221 | |||||
11222 | MachineFunction *MF = BB->getParent(); | ||||
11223 | MachineRegisterInfo &MRI = MF->getRegInfo(); | ||||
11224 | unsigned UnitSize = 0; | ||||
11225 | const TargetRegisterClass *TRC = nullptr; | ||||
11226 | const TargetRegisterClass *VecTRC = nullptr; | ||||
11227 | |||||
11228 | bool IsThumb1 = Subtarget->isThumb1Only(); | ||||
11229 | bool IsThumb2 = Subtarget->isThumb2(); | ||||
11230 | bool IsThumb = Subtarget->isThumb(); | ||||
11231 | |||||
11232 | if (Alignment & 1) { | ||||
11233 | UnitSize = 1; | ||||
11234 | } else if (Alignment & 2) { | ||||
11235 | UnitSize = 2; | ||||
11236 | } else { | ||||
11237 | // Check whether we can use NEON instructions. | ||||
11238 | if (!MF->getFunction().hasFnAttribute(Attribute::NoImplicitFloat) && | ||||
11239 | Subtarget->hasNEON()) { | ||||
11240 | if ((Alignment % 16 == 0) && SizeVal >= 16) | ||||
11241 | UnitSize = 16; | ||||
11242 | else if ((Alignment % 8 == 0) && SizeVal >= 8) | ||||
11243 | UnitSize = 8; | ||||
11244 | } | ||||
11245 | // Can't use NEON instructions. | ||||
11246 | if (UnitSize == 0) | ||||
11247 | UnitSize = 4; | ||||
11248 | } | ||||
11249 | |||||
11250 | // Select the correct opcode and register class for unit size load/store | ||||
11251 | bool IsNeon = UnitSize >= 8; | ||||
11252 | TRC = IsThumb ? &ARM::tGPRRegClass : &ARM::GPRRegClass; | ||||
11253 | if (IsNeon) | ||||
11254 | VecTRC = UnitSize == 16 ? &ARM::DPairRegClass | ||||
11255 | : UnitSize == 8 ? &ARM::DPRRegClass | ||||
11256 | : nullptr; | ||||
11257 | |||||
11258 | unsigned BytesLeft = SizeVal % UnitSize; | ||||
11259 | unsigned LoopSize = SizeVal - BytesLeft; | ||||
11260 | |||||
11261 | if (SizeVal <= Subtarget->getMaxInlineSizeThreshold()) { | ||||
11262 | // Use LDR and STR to copy. | ||||
11263 | // [scratch, srcOut] = LDR_POST(srcIn, UnitSize) | ||||
11264 | // [destOut] = STR_POST(scratch, destIn, UnitSize) | ||||
11265 | unsigned srcIn = src; | ||||
11266 | unsigned destIn = dest; | ||||
11267 | for (unsigned i = 0; i < LoopSize; i+=UnitSize) { | ||||
11268 | Register srcOut = MRI.createVirtualRegister(TRC); | ||||
11269 | Register destOut = MRI.createVirtualRegister(TRC); | ||||
11270 | Register scratch = MRI.createVirtualRegister(IsNeon ? VecTRC : TRC); | ||||
11271 | emitPostLd(BB, MI, TII, dl, UnitSize, scratch, srcIn, srcOut, | ||||
11272 | IsThumb1, IsThumb2); | ||||
11273 | emitPostSt(BB, MI, TII, dl, UnitSize, scratch, destIn, destOut, | ||||
11274 | IsThumb1, IsThumb2); | ||||
11275 | srcIn = srcOut; | ||||
11276 | destIn = destOut; | ||||
11277 | } | ||||
11278 | |||||
11279 | // Handle the leftover bytes with LDRB and STRB. | ||||
11280 | // [scratch, srcOut] = LDRB_POST(srcIn, 1) | ||||
11281 | // [destOut] = STRB_POST(scratch, destIn, 1) | ||||
11282 | for (unsigned i = 0; i < BytesLeft; i++) { | ||||
11283 | Register srcOut = MRI.createVirtualRegister(TRC); | ||||
11284 | Register destOut = MRI.createVirtualRegister(TRC); | ||||
11285 | Register scratch = MRI.createVirtualRegister(TRC); | ||||
11286 | emitPostLd(BB, MI, TII, dl, 1, scratch, srcIn, srcOut, | ||||
11287 | IsThumb1, IsThumb2); | ||||
11288 | emitPostSt(BB, MI, TII, dl, 1, scratch, destIn, destOut, | ||||
11289 | IsThumb1, IsThumb2); | ||||
11290 | srcIn = srcOut; | ||||
11291 | destIn = destOut; | ||||
11292 | } | ||||
11293 | MI.eraseFromParent(); // The instruction is gone now. | ||||
11294 | return BB; | ||||
11295 | } | ||||
11296 | |||||
11297 | // Expand the pseudo op to a loop. | ||||
11298 | // thisMBB: | ||||
11299 | // ... | ||||
11300 | // movw varEnd, # --> with thumb2 | ||||
11301 | // movt varEnd, # | ||||
11302 | // ldrcp varEnd, idx --> without thumb2 | ||||
11303 | // fallthrough --> loopMBB | ||||
11304 | // loopMBB: | ||||
11305 | // PHI varPhi, varEnd, varLoop | ||||
11306 | // PHI srcPhi, src, srcLoop | ||||
11307 | // PHI destPhi, dst, destLoop | ||||
11308 | // [scratch, srcLoop] = LDR_POST(srcPhi, UnitSize) | ||||
11309 | // [destLoop] = STR_POST(scratch, destPhi, UnitSize) | ||||
11310 | // subs varLoop, varPhi, #UnitSize | ||||
11311 | // bne loopMBB | ||||
11312 | // fallthrough --> exitMBB | ||||
11313 | // exitMBB: | ||||
11314 | // epilogue to handle left-over bytes | ||||
11315 | // [scratch, srcOut] = LDRB_POST(srcLoop, 1) | ||||
11316 | // [destOut] = STRB_POST(scratch, destLoop, 1) | ||||
11317 | MachineBasicBlock *loopMBB = MF->CreateMachineBasicBlock(LLVM_BB); | ||||
11318 | MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB); | ||||
11319 | MF->insert(It, loopMBB); | ||||
11320 | MF->insert(It, exitMBB); | ||||
11321 | |||||
11322 | // Transfer the remainder of BB and its successor edges to exitMBB. | ||||
11323 | exitMBB->splice(exitMBB->begin(), BB, | ||||
11324 | std::next(MachineBasicBlock::iterator(MI)), BB->end()); | ||||
11325 | exitMBB->transferSuccessorsAndUpdatePHIs(BB); | ||||
11326 | |||||
11327 | // Load an immediate to varEnd. | ||||
11328 | Register varEnd = MRI.createVirtualRegister(TRC); | ||||
11329 | if (Subtarget->useMovt()) { | ||||
11330 | unsigned Vtmp = varEnd; | ||||
11331 | if ((LoopSize & 0xFFFF0000) != 0) | ||||
11332 | Vtmp = MRI.createVirtualRegister(TRC); | ||||
11333 | BuildMI(BB, dl, TII->get(IsThumb ? ARM::t2MOVi16 : ARM::MOVi16), Vtmp) | ||||
11334 | .addImm(LoopSize & 0xFFFF) | ||||
11335 | .add(predOps(ARMCC::AL)); | ||||
11336 | |||||
11337 | if ((LoopSize & 0xFFFF0000) != 0) | ||||
11338 | BuildMI(BB, dl, TII->get(IsThumb ? ARM::t2MOVTi16 : ARM::MOVTi16), varEnd) | ||||
11339 | .addReg(Vtmp) | ||||
11340 | .addImm(LoopSize >> 16) | ||||
11341 | .add(predOps(ARMCC::AL)); | ||||
11342 | } else { | ||||
11343 | MachineConstantPool *ConstantPool = MF->getConstantPool(); | ||||
11344 | Type *Int32Ty = Type::getInt32Ty(MF->getFunction().getContext()); | ||||
11345 | const Constant *C = ConstantInt::get(Int32Ty, LoopSize); | ||||
11346 | |||||
11347 | // MachineConstantPool wants an explicit alignment. | ||||
11348 | Align Alignment = MF->getDataLayout().getPrefTypeAlign(Int32Ty); | ||||
11349 | unsigned Idx = ConstantPool->getConstantPoolIndex(C, Alignment); | ||||
11350 | MachineMemOperand *CPMMO = | ||||
11351 | MF->getMachineMemOperand(MachinePointerInfo::getConstantPool(*MF), | ||||
11352 | MachineMemOperand::MOLoad, 4, Align(4)); | ||||
11353 | |||||
11354 | if (IsThumb) | ||||
11355 | BuildMI(*BB, MI, dl, TII->get(ARM::tLDRpci)) | ||||
11356 | .addReg(varEnd, RegState::Define) | ||||
11357 | .addConstantPoolIndex(Idx) | ||||
11358 | .add(predOps(ARMCC::AL)) | ||||
11359 | .addMemOperand(CPMMO); | ||||
11360 | else | ||||
11361 | BuildMI(*BB, MI, dl, TII->get(ARM::LDRcp)) | ||||
11362 | .addReg(varEnd, RegState::Define) | ||||
11363 | .addConstantPoolIndex(Idx) | ||||
11364 | .addImm(0) | ||||
11365 | .add(predOps(ARMCC::AL)) | ||||
11366 | .addMemOperand(CPMMO); | ||||
11367 | } | ||||
11368 | BB->addSuccessor(loopMBB); | ||||
11369 | |||||
11370 | // Generate the loop body: | ||||
11371 | // varPhi = PHI(varLoop, varEnd) | ||||
11372 | // srcPhi = PHI(srcLoop, src) | ||||
11373 | // destPhi = PHI(destLoop, dst) | ||||
11374 | MachineBasicBlock *entryBB = BB; | ||||
11375 | BB = loopMBB; | ||||
11376 | Register varLoop = MRI.createVirtualRegister(TRC); | ||||
11377 | Register varPhi = MRI.createVirtualRegister(TRC); | ||||
11378 | Register srcLoop = MRI.createVirtualRegister(TRC); | ||||
11379 | Register srcPhi = MRI.createVirtualRegister(TRC); | ||||
11380 | Register destLoop = MRI.createVirtualRegister(TRC); | ||||
11381 | Register destPhi = MRI.createVirtualRegister(TRC); | ||||
11382 | |||||
11383 | BuildMI(*BB, BB->begin(), dl, TII->get(ARM::PHI), varPhi) | ||||
11384 | .addReg(varLoop).addMBB(loopMBB) | ||||
11385 | .addReg(varEnd).addMBB(entryBB); | ||||
11386 | BuildMI(BB, dl, TII->get(ARM::PHI), srcPhi) | ||||
11387 | .addReg(srcLoop).addMBB(loopMBB) | ||||
11388 | .addReg(src).addMBB(entryBB); | ||||
11389 | BuildMI(BB, dl, TII->get(ARM::PHI), destPhi) | ||||
11390 | .addReg(destLoop).addMBB(loopMBB) | ||||
11391 | .addReg(dest).addMBB(entryBB); | ||||
11392 | |||||
11393 | // [scratch, srcLoop] = LDR_POST(srcPhi, UnitSize) | ||||
11394 | // [destLoop] = STR_POST(scratch, destPhi, UnitSiz) | ||||
11395 | Register scratch = MRI.createVirtualRegister(IsNeon ? VecTRC : TRC); | ||||
11396 | emitPostLd(BB, BB->end(), TII, dl, UnitSize, scratch, srcPhi, srcLoop, | ||||
11397 | IsThumb1, IsThumb2); | ||||
11398 | emitPostSt(BB, BB->end(), TII, dl, UnitSize, scratch, destPhi, destLoop, | ||||
11399 | IsThumb1, IsThumb2); | ||||
11400 | |||||
11401 | // Decrement loop variable by UnitSize. | ||||
11402 | if (IsThumb1) { | ||||
11403 | BuildMI(*BB, BB->end(), dl, TII->get(ARM::tSUBi8), varLoop) | ||||
11404 | .add(t1CondCodeOp()) | ||||
11405 | .addReg(varPhi) | ||||
11406 | .addImm(UnitSize) | ||||
11407 | .add(predOps(ARMCC::AL)); | ||||
11408 | } else { | ||||
11409 | MachineInstrBuilder MIB = | ||||
11410 | BuildMI(*BB, BB->end(), dl, | ||||
11411 | TII->get(IsThumb2 ? ARM::t2SUBri : ARM::SUBri), varLoop); | ||||
11412 | MIB.addReg(varPhi) | ||||
11413 | .addImm(UnitSize) | ||||
11414 | .add(predOps(ARMCC::AL)) | ||||
11415 | .add(condCodeOp()); | ||||
11416 | MIB->getOperand(5).setReg(ARM::CPSR); | ||||
11417 | MIB->getOperand(5).setIsDef(true); | ||||
11418 | } | ||||
11419 | BuildMI(*BB, BB->end(), dl, | ||||
11420 | TII->get(IsThumb1 ? ARM::tBcc : IsThumb2 ? ARM::t2Bcc : ARM::Bcc)) | ||||
11421 | .addMBB(loopMBB).addImm(ARMCC::NE).addReg(ARM::CPSR); | ||||
11422 | |||||
11423 | // loopMBB can loop back to loopMBB or fall through to exitMBB. | ||||
11424 | BB->addSuccessor(loopMBB); | ||||
11425 | BB->addSuccessor(exitMBB); | ||||
11426 | |||||
11427 | // Add epilogue to handle BytesLeft. | ||||
11428 | BB = exitMBB; | ||||
11429 | auto StartOfExit = exitMBB->begin(); | ||||
11430 | |||||
11431 | // [scratch, srcOut] = LDRB_POST(srcLoop, 1) | ||||
11432 | // [destOut] = STRB_POST(scratch, destLoop, 1) | ||||
11433 | unsigned srcIn = srcLoop; | ||||
11434 | unsigned destIn = destLoop; | ||||
11435 | for (unsigned i = 0; i < BytesLeft; i++) { | ||||
11436 | Register srcOut = MRI.createVirtualRegister(TRC); | ||||
11437 | Register destOut = MRI.createVirtualRegister(TRC); | ||||
11438 | Register scratch = MRI.createVirtualRegister(TRC); | ||||
11439 | emitPostLd(BB, StartOfExit, TII, dl, 1, scratch, srcIn, srcOut, | ||||
11440 | IsThumb1, IsThumb2); | ||||
11441 | emitPostSt(BB, StartOfExit, TII, dl, 1, scratch, destIn, destOut, | ||||
11442 | IsThumb1, IsThumb2); | ||||
11443 | srcIn = srcOut; | ||||
11444 | destIn = destOut; | ||||
11445 | } | ||||
11446 | |||||
11447 | MI.eraseFromParent(); // The instruction is gone now. | ||||
11448 | return BB; | ||||
11449 | } | ||||
11450 | |||||
11451 | MachineBasicBlock * | ||||
11452 | ARMTargetLowering::EmitLowered__chkstk(MachineInstr &MI, | ||||
11453 | MachineBasicBlock *MBB) const { | ||||
11454 | const TargetMachine &TM = getTargetMachine(); | ||||
11455 | const TargetInstrInfo &TII = *Subtarget->getInstrInfo(); | ||||
11456 | DebugLoc DL = MI.getDebugLoc(); | ||||
11457 | |||||
11458 | assert(Subtarget->isTargetWindows() &&(static_cast <bool> (Subtarget->isTargetWindows() && "__chkstk is only supported on Windows") ? void (0) : __assert_fail ("Subtarget->isTargetWindows() && \"__chkstk is only supported on Windows\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 11459, __extension__ __PRETTY_FUNCTION__)) | ||||
11459 | "__chkstk is only supported on Windows")(static_cast <bool> (Subtarget->isTargetWindows() && "__chkstk is only supported on Windows") ? void (0) : __assert_fail ("Subtarget->isTargetWindows() && \"__chkstk is only supported on Windows\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 11459, __extension__ __PRETTY_FUNCTION__)); | ||||
11460 | assert(Subtarget->isThumb2() && "Windows on ARM requires Thumb-2 mode")(static_cast <bool> (Subtarget->isThumb2() && "Windows on ARM requires Thumb-2 mode") ? void (0) : __assert_fail ("Subtarget->isThumb2() && \"Windows on ARM requires Thumb-2 mode\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 11460, __extension__ __PRETTY_FUNCTION__)); | ||||
11461 | |||||
11462 | // __chkstk takes the number of words to allocate on the stack in R4, and | ||||
11463 | // returns the stack adjustment in number of bytes in R4. This will not | ||||
11464 | // clober any other registers (other than the obvious lr). | ||||
11465 | // | ||||
11466 | // Although, technically, IP should be considered a register which may be | ||||
11467 | // clobbered, the call itself will not touch it. Windows on ARM is a pure | ||||
11468 | // thumb-2 environment, so there is no interworking required. As a result, we | ||||
11469 | // do not expect a veneer to be emitted by the linker, clobbering IP. | ||||
11470 | // | ||||
11471 | // Each module receives its own copy of __chkstk, so no import thunk is | ||||
11472 | // required, again, ensuring that IP is not clobbered. | ||||
11473 | // | ||||
11474 | // Finally, although some linkers may theoretically provide a trampoline for | ||||
11475 | // out of range calls (which is quite common due to a 32M range limitation of | ||||
11476 | // branches for Thumb), we can generate the long-call version via | ||||
11477 | // -mcmodel=large, alleviating the need for the trampoline which may clobber | ||||
11478 | // IP. | ||||
11479 | |||||
11480 | switch (TM.getCodeModel()) { | ||||
11481 | case CodeModel::Tiny: | ||||
11482 | llvm_unreachable("Tiny code model not available on ARM.")::llvm::llvm_unreachable_internal("Tiny code model not available on ARM." , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 11482); | ||||
11483 | case CodeModel::Small: | ||||
11484 | case CodeModel::Medium: | ||||
11485 | case CodeModel::Kernel: | ||||
11486 | BuildMI(*MBB, MI, DL, TII.get(ARM::tBL)) | ||||
11487 | .add(predOps(ARMCC::AL)) | ||||
11488 | .addExternalSymbol("__chkstk") | ||||
11489 | .addReg(ARM::R4, RegState::Implicit | RegState::Kill) | ||||
11490 | .addReg(ARM::R4, RegState::Implicit | RegState::Define) | ||||
11491 | .addReg(ARM::R12, | ||||
11492 | RegState::Implicit | RegState::Define | RegState::Dead) | ||||
11493 | .addReg(ARM::CPSR, | ||||
11494 | RegState::Implicit | RegState::Define | RegState::Dead); | ||||
11495 | break; | ||||
11496 | case CodeModel::Large: { | ||||
11497 | MachineRegisterInfo &MRI = MBB->getParent()->getRegInfo(); | ||||
11498 | Register Reg = MRI.createVirtualRegister(&ARM::rGPRRegClass); | ||||
11499 | |||||
11500 | BuildMI(*MBB, MI, DL, TII.get(ARM::t2MOVi32imm), Reg) | ||||
11501 | .addExternalSymbol("__chkstk"); | ||||
11502 | BuildMI(*MBB, MI, DL, TII.get(gettBLXrOpcode(*MBB->getParent()))) | ||||
11503 | .add(predOps(ARMCC::AL)) | ||||
11504 | .addReg(Reg, RegState::Kill) | ||||
11505 | .addReg(ARM::R4, RegState::Implicit | RegState::Kill) | ||||
11506 | .addReg(ARM::R4, RegState::Implicit | RegState::Define) | ||||
11507 | .addReg(ARM::R12, | ||||
11508 | RegState::Implicit | RegState::Define | RegState::Dead) | ||||
11509 | .addReg(ARM::CPSR, | ||||
11510 | RegState::Implicit | RegState::Define | RegState::Dead); | ||||
11511 | break; | ||||
11512 | } | ||||
11513 | } | ||||
11514 | |||||
11515 | BuildMI(*MBB, MI, DL, TII.get(ARM::t2SUBrr), ARM::SP) | ||||
11516 | .addReg(ARM::SP, RegState::Kill) | ||||
11517 | .addReg(ARM::R4, RegState::Kill) | ||||
11518 | .setMIFlags(MachineInstr::FrameSetup) | ||||
11519 | .add(predOps(ARMCC::AL)) | ||||
11520 | .add(condCodeOp()); | ||||
11521 | |||||
11522 | MI.eraseFromParent(); | ||||
11523 | return MBB; | ||||
11524 | } | ||||
11525 | |||||
11526 | MachineBasicBlock * | ||||
11527 | ARMTargetLowering::EmitLowered__dbzchk(MachineInstr &MI, | ||||
11528 | MachineBasicBlock *MBB) const { | ||||
11529 | DebugLoc DL = MI.getDebugLoc(); | ||||
11530 | MachineFunction *MF = MBB->getParent(); | ||||
11531 | const TargetInstrInfo *TII = Subtarget->getInstrInfo(); | ||||
11532 | |||||
11533 | MachineBasicBlock *ContBB = MF->CreateMachineBasicBlock(); | ||||
11534 | MF->insert(++MBB->getIterator(), ContBB); | ||||
11535 | ContBB->splice(ContBB->begin(), MBB, | ||||
11536 | std::next(MachineBasicBlock::iterator(MI)), MBB->end()); | ||||
11537 | ContBB->transferSuccessorsAndUpdatePHIs(MBB); | ||||
11538 | MBB->addSuccessor(ContBB); | ||||
11539 | |||||
11540 | MachineBasicBlock *TrapBB = MF->CreateMachineBasicBlock(); | ||||
11541 | BuildMI(TrapBB, DL, TII->get(ARM::t__brkdiv0)); | ||||
11542 | MF->push_back(TrapBB); | ||||
11543 | MBB->addSuccessor(TrapBB); | ||||
11544 | |||||
11545 | BuildMI(*MBB, MI, DL, TII->get(ARM::tCMPi8)) | ||||
11546 | .addReg(MI.getOperand(0).getReg()) | ||||
11547 | .addImm(0) | ||||
11548 | .add(predOps(ARMCC::AL)); | ||||
11549 | BuildMI(*MBB, MI, DL, TII->get(ARM::t2Bcc)) | ||||
11550 | .addMBB(TrapBB) | ||||
11551 | .addImm(ARMCC::EQ) | ||||
11552 | .addReg(ARM::CPSR); | ||||
11553 | |||||
11554 | MI.eraseFromParent(); | ||||
11555 | return ContBB; | ||||
11556 | } | ||||
11557 | |||||
11558 | // The CPSR operand of SelectItr might be missing a kill marker | ||||
11559 | // because there were multiple uses of CPSR, and ISel didn't know | ||||
11560 | // which to mark. Figure out whether SelectItr should have had a | ||||
11561 | // kill marker, and set it if it should. Returns the correct kill | ||||
11562 | // marker value. | ||||
11563 | static bool checkAndUpdateCPSRKill(MachineBasicBlock::iterator SelectItr, | ||||
11564 | MachineBasicBlock* BB, | ||||
11565 | const TargetRegisterInfo* TRI) { | ||||
11566 | // Scan forward through BB for a use/def of CPSR. | ||||
11567 | MachineBasicBlock::iterator miI(std::next(SelectItr)); | ||||
11568 | for (MachineBasicBlock::iterator miE = BB->end(); miI != miE; ++miI) { | ||||
11569 | const MachineInstr& mi = *miI; | ||||
11570 | if (mi.readsRegister(ARM::CPSR)) | ||||
11571 | return false; | ||||
11572 | if (mi.definesRegister(ARM::CPSR)) | ||||
11573 | break; // Should have kill-flag - update below. | ||||
11574 | } | ||||
11575 | |||||
11576 | // If we hit the end of the block, check whether CPSR is live into a | ||||
11577 | // successor. | ||||
11578 | if (miI == BB->end()) { | ||||
11579 | for (MachineBasicBlock *Succ : BB->successors()) | ||||
11580 | if (Succ->isLiveIn(ARM::CPSR)) | ||||
11581 | return false; | ||||
11582 | } | ||||
11583 | |||||
11584 | // We found a def, or hit the end of the basic block and CPSR wasn't live | ||||
11585 | // out. SelectMI should have a kill flag on CPSR. | ||||
11586 | SelectItr->addRegisterKilled(ARM::CPSR, TRI); | ||||
11587 | return true; | ||||
11588 | } | ||||
11589 | |||||
11590 | /// Adds logic in loop entry MBB to calculate loop iteration count and adds | ||||
11591 | /// t2WhileLoopSetup and t2WhileLoopStart to generate WLS loop | ||||
11592 | static Register genTPEntry(MachineBasicBlock *TpEntry, | ||||
11593 | MachineBasicBlock *TpLoopBody, | ||||
11594 | MachineBasicBlock *TpExit, Register OpSizeReg, | ||||
11595 | const TargetInstrInfo *TII, DebugLoc Dl, | ||||
11596 | MachineRegisterInfo &MRI) { | ||||
11597 | // Calculates loop iteration count = ceil(n/16) = (n + 15) >> 4. | ||||
11598 | Register AddDestReg = MRI.createVirtualRegister(&ARM::rGPRRegClass); | ||||
11599 | BuildMI(TpEntry, Dl, TII->get(ARM::t2ADDri), AddDestReg) | ||||
11600 | .addUse(OpSizeReg) | ||||
11601 | .addImm(15) | ||||
11602 | .add(predOps(ARMCC::AL)) | ||||
11603 | .addReg(0); | ||||
11604 | |||||
11605 | Register LsrDestReg = MRI.createVirtualRegister(&ARM::rGPRRegClass); | ||||
11606 | BuildMI(TpEntry, Dl, TII->get(ARM::t2LSRri), LsrDestReg) | ||||
11607 | .addUse(AddDestReg, RegState::Kill) | ||||
11608 | .addImm(4) | ||||
11609 | .add(predOps(ARMCC::AL)) | ||||
11610 | .addReg(0); | ||||
11611 | |||||
11612 | Register TotalIterationsReg = MRI.createVirtualRegister(&ARM::GPRlrRegClass); | ||||
11613 | BuildMI(TpEntry, Dl, TII->get(ARM::t2WhileLoopSetup), TotalIterationsReg) | ||||
11614 | .addUse(LsrDestReg, RegState::Kill); | ||||
11615 | |||||
11616 | BuildMI(TpEntry, Dl, TII->get(ARM::t2WhileLoopStart)) | ||||
11617 | .addUse(TotalIterationsReg) | ||||
11618 | .addMBB(TpExit); | ||||
11619 | |||||
11620 | BuildMI(TpEntry, Dl, TII->get(ARM::t2B)) | ||||
11621 | .addMBB(TpLoopBody) | ||||
11622 | .add(predOps(ARMCC::AL)); | ||||
11623 | |||||
11624 | return TotalIterationsReg; | ||||
11625 | } | ||||
11626 | |||||
11627 | /// Adds logic in the loopBody MBB to generate MVE_VCTP, t2DoLoopDec and | ||||
11628 | /// t2DoLoopEnd. These are used by later passes to generate tail predicated | ||||
11629 | /// loops. | ||||
11630 | static void genTPLoopBody(MachineBasicBlock *TpLoopBody, | ||||
11631 | MachineBasicBlock *TpEntry, MachineBasicBlock *TpExit, | ||||
11632 | const TargetInstrInfo *TII, DebugLoc Dl, | ||||
11633 | MachineRegisterInfo &MRI, Register OpSrcReg, | ||||
11634 | Register OpDestReg, Register ElementCountReg, | ||||
11635 | Register TotalIterationsReg, bool IsMemcpy) { | ||||
11636 | // First insert 4 PHI nodes for: Current pointer to Src (if memcpy), Dest | ||||
11637 | // array, loop iteration counter, predication counter. | ||||
11638 | |||||
11639 | Register SrcPhiReg, CurrSrcReg; | ||||
11640 | if (IsMemcpy) { | ||||
11641 | // Current position in the src array | ||||
11642 | SrcPhiReg = MRI.createVirtualRegister(&ARM::rGPRRegClass); | ||||
11643 | CurrSrcReg = MRI.createVirtualRegister(&ARM::rGPRRegClass); | ||||
11644 | BuildMI(TpLoopBody, Dl, TII->get(ARM::PHI), SrcPhiReg) | ||||
11645 | .addUse(OpSrcReg) | ||||
11646 | .addMBB(TpEntry) | ||||
11647 | .addUse(CurrSrcReg) | ||||
11648 | .addMBB(TpLoopBody); | ||||
11649 | } | ||||
11650 | |||||
11651 | // Current position in the dest array | ||||
11652 | Register DestPhiReg = MRI.createVirtualRegister(&ARM::rGPRRegClass); | ||||
11653 | Register CurrDestReg = MRI.createVirtualRegister(&ARM::rGPRRegClass); | ||||
11654 | BuildMI(TpLoopBody, Dl, TII->get(ARM::PHI), DestPhiReg) | ||||
11655 | .addUse(OpDestReg) | ||||
11656 | .addMBB(TpEntry) | ||||
11657 | .addUse(CurrDestReg) | ||||
11658 | .addMBB(TpLoopBody); | ||||
11659 | |||||
11660 | // Current loop counter | ||||
11661 | Register LoopCounterPhiReg = MRI.createVirtualRegister(&ARM::GPRlrRegClass); | ||||
11662 | Register RemainingLoopIterationsReg = | ||||
11663 | MRI.createVirtualRegister(&ARM::GPRlrRegClass); | ||||
11664 | BuildMI(TpLoopBody, Dl, TII->get(ARM::PHI), LoopCounterPhiReg) | ||||
11665 | .addUse(TotalIterationsReg) | ||||
11666 | .addMBB(TpEntry) | ||||
11667 | .addUse(RemainingLoopIterationsReg) | ||||
11668 | .addMBB(TpLoopBody); | ||||
11669 | |||||
11670 | // Predication counter | ||||
11671 | Register PredCounterPhiReg = MRI.createVirtualRegister(&ARM::rGPRRegClass); | ||||
11672 | Register RemainingElementsReg = MRI.createVirtualRegister(&ARM::rGPRRegClass); | ||||
11673 | BuildMI(TpLoopBody, Dl, TII->get(ARM::PHI), PredCounterPhiReg) | ||||
11674 | .addUse(ElementCountReg) | ||||
11675 | .addMBB(TpEntry) | ||||
11676 | .addUse(RemainingElementsReg) | ||||
11677 | .addMBB(TpLoopBody); | ||||
11678 | |||||
11679 | // Pass predication counter to VCTP | ||||
11680 | Register VccrReg = MRI.createVirtualRegister(&ARM::VCCRRegClass); | ||||
11681 | BuildMI(TpLoopBody, Dl, TII->get(ARM::MVE_VCTP8), VccrReg) | ||||
11682 | .addUse(PredCounterPhiReg) | ||||
11683 | .addImm(ARMVCC::None) | ||||
11684 | .addReg(0) | ||||
11685 | .addReg(0); | ||||
11686 | |||||
11687 | BuildMI(TpLoopBody, Dl, TII->get(ARM::t2SUBri), RemainingElementsReg) | ||||
11688 | .addUse(PredCounterPhiReg) | ||||
11689 | .addImm(16) | ||||
11690 | .add(predOps(ARMCC::AL)) | ||||
11691 | .addReg(0); | ||||
11692 | |||||
11693 | // VLDRB (only if memcpy) and VSTRB instructions, predicated using VPR | ||||
11694 | Register SrcValueReg; | ||||
11695 | if (IsMemcpy) { | ||||
11696 | SrcValueReg = MRI.createVirtualRegister(&ARM::MQPRRegClass); | ||||
11697 | BuildMI(TpLoopBody, Dl, TII->get(ARM::MVE_VLDRBU8_post)) | ||||
11698 | .addDef(CurrSrcReg) | ||||
11699 | .addDef(SrcValueReg) | ||||
11700 | .addReg(SrcPhiReg) | ||||
11701 | .addImm(16) | ||||
11702 | .addImm(ARMVCC::Then) | ||||
11703 | .addUse(VccrReg) | ||||
11704 | .addReg(0); | ||||
11705 | } else | ||||
11706 | SrcValueReg = OpSrcReg; | ||||
11707 | |||||
11708 | BuildMI(TpLoopBody, Dl, TII->get(ARM::MVE_VSTRBU8_post)) | ||||
11709 | .addDef(CurrDestReg) | ||||
11710 | .addUse(SrcValueReg) | ||||
11711 | .addReg(DestPhiReg) | ||||
11712 | .addImm(16) | ||||
11713 | .addImm(ARMVCC::Then) | ||||
11714 | .addUse(VccrReg) | ||||
11715 | .addReg(0); | ||||
11716 | |||||
11717 | // Add the pseudoInstrs for decrementing the loop counter and marking the | ||||
11718 | // end:t2DoLoopDec and t2DoLoopEnd | ||||
11719 | BuildMI(TpLoopBody, Dl, TII->get(ARM::t2LoopDec), RemainingLoopIterationsReg) | ||||
11720 | .addUse(LoopCounterPhiReg) | ||||
11721 | .addImm(1); | ||||
11722 | |||||
11723 | BuildMI(TpLoopBody, Dl, TII->get(ARM::t2LoopEnd)) | ||||
11724 | .addUse(RemainingLoopIterationsReg) | ||||
11725 | .addMBB(TpLoopBody); | ||||
11726 | |||||
11727 | BuildMI(TpLoopBody, Dl, TII->get(ARM::t2B)) | ||||
11728 | .addMBB(TpExit) | ||||
11729 | .add(predOps(ARMCC::AL)); | ||||
11730 | } | ||||
11731 | |||||
11732 | MachineBasicBlock * | ||||
11733 | ARMTargetLowering::EmitInstrWithCustomInserter(MachineInstr &MI, | ||||
11734 | MachineBasicBlock *BB) const { | ||||
11735 | const TargetInstrInfo *TII = Subtarget->getInstrInfo(); | ||||
11736 | DebugLoc dl = MI.getDebugLoc(); | ||||
11737 | bool isThumb2 = Subtarget->isThumb2(); | ||||
11738 | switch (MI.getOpcode()) { | ||||
11739 | default: { | ||||
11740 | MI.print(errs()); | ||||
11741 | llvm_unreachable("Unexpected instr type to insert")::llvm::llvm_unreachable_internal("Unexpected instr type to insert" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 11741); | ||||
11742 | } | ||||
11743 | |||||
11744 | // Thumb1 post-indexed loads are really just single-register LDMs. | ||||
11745 | case ARM::tLDR_postidx: { | ||||
11746 | MachineOperand Def(MI.getOperand(1)); | ||||
11747 | BuildMI(*BB, MI, dl, TII->get(ARM::tLDMIA_UPD)) | ||||
11748 | .add(Def) // Rn_wb | ||||
11749 | .add(MI.getOperand(2)) // Rn | ||||
11750 | .add(MI.getOperand(3)) // PredImm | ||||
11751 | .add(MI.getOperand(4)) // PredReg | ||||
11752 | .add(MI.getOperand(0)) // Rt | ||||
11753 | .cloneMemRefs(MI); | ||||
11754 | MI.eraseFromParent(); | ||||
11755 | return BB; | ||||
11756 | } | ||||
11757 | |||||
11758 | case ARM::MVE_MEMCPYLOOPINST: | ||||
11759 | case ARM::MVE_MEMSETLOOPINST: { | ||||
11760 | |||||
11761 | // Transformation below expands MVE_MEMCPYLOOPINST/MVE_MEMSETLOOPINST Pseudo | ||||
11762 | // into a Tail Predicated (TP) Loop. It adds the instructions to calculate | ||||
11763 | // the iteration count =ceil(size_in_bytes/16)) in the TP entry block and | ||||
11764 | // adds the relevant instructions in the TP loop Body for generation of a | ||||
11765 | // WLSTP loop. | ||||
11766 | |||||
11767 | // Below is relevant portion of the CFG after the transformation. | ||||
11768 | // The Machine Basic Blocks are shown along with branch conditions (in | ||||
11769 | // brackets). Note that TP entry/exit MBBs depict the entry/exit of this | ||||
11770 | // portion of the CFG and may not necessarily be the entry/exit of the | ||||
11771 | // function. | ||||
11772 | |||||
11773 | // (Relevant) CFG after transformation: | ||||
11774 | // TP entry MBB | ||||
11775 | // | | ||||
11776 | // |-----------------| | ||||
11777 | // (n <= 0) (n > 0) | ||||
11778 | // | | | ||||
11779 | // | TP loop Body MBB<--| | ||||
11780 | // | | | | ||||
11781 | // \ |___________| | ||||
11782 | // \ / | ||||
11783 | // TP exit MBB | ||||
11784 | |||||
11785 | MachineFunction *MF = BB->getParent(); | ||||
11786 | MachineFunctionProperties &Properties = MF->getProperties(); | ||||
11787 | MachineRegisterInfo &MRI = MF->getRegInfo(); | ||||
11788 | |||||
11789 | Register OpDestReg = MI.getOperand(0).getReg(); | ||||
11790 | Register OpSrcReg = MI.getOperand(1).getReg(); | ||||
11791 | Register OpSizeReg = MI.getOperand(2).getReg(); | ||||
11792 | |||||
11793 | // Allocate the required MBBs and add to parent function. | ||||
11794 | MachineBasicBlock *TpEntry = BB; | ||||
11795 | MachineBasicBlock *TpLoopBody = MF->CreateMachineBasicBlock(); | ||||
11796 | MachineBasicBlock *TpExit; | ||||
11797 | |||||
11798 | MF->push_back(TpLoopBody); | ||||
11799 | |||||
11800 | // If any instructions are present in the current block after | ||||
11801 | // MVE_MEMCPYLOOPINST or MVE_MEMSETLOOPINST, split the current block and | ||||
11802 | // move the instructions into the newly created exit block. If there are no | ||||
11803 | // instructions add an explicit branch to the FallThrough block and then | ||||
11804 | // split. | ||||
11805 | // | ||||
11806 | // The split is required for two reasons: | ||||
11807 | // 1) A terminator(t2WhileLoopStart) will be placed at that site. | ||||
11808 | // 2) Since a TPLoopBody will be added later, any phis in successive blocks | ||||
11809 | // need to be updated. splitAt() already handles this. | ||||
11810 | TpExit = BB->splitAt(MI, false); | ||||
11811 | if (TpExit == BB) { | ||||
11812 | assert(BB->canFallThrough() && "Exit Block must be Fallthrough of the "(static_cast <bool> (BB->canFallThrough() && "Exit Block must be Fallthrough of the " "block containing memcpy/memset Pseudo" ) ? void (0) : __assert_fail ("BB->canFallThrough() && \"Exit Block must be Fallthrough of the \" \"block containing memcpy/memset Pseudo\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 11813, __extension__ __PRETTY_FUNCTION__)) | ||||
11813 | "block containing memcpy/memset Pseudo")(static_cast <bool> (BB->canFallThrough() && "Exit Block must be Fallthrough of the " "block containing memcpy/memset Pseudo" ) ? void (0) : __assert_fail ("BB->canFallThrough() && \"Exit Block must be Fallthrough of the \" \"block containing memcpy/memset Pseudo\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 11813, __extension__ __PRETTY_FUNCTION__)); | ||||
11814 | TpExit = BB->getFallThrough(); | ||||
11815 | BuildMI(BB, dl, TII->get(ARM::t2B)) | ||||
11816 | .addMBB(TpExit) | ||||
11817 | .add(predOps(ARMCC::AL)); | ||||
11818 | TpExit = BB->splitAt(MI, false); | ||||
11819 | } | ||||
11820 | |||||
11821 | // Add logic for iteration count | ||||
11822 | Register TotalIterationsReg = | ||||
11823 | genTPEntry(TpEntry, TpLoopBody, TpExit, OpSizeReg, TII, dl, MRI); | ||||
11824 | |||||
11825 | // Add the vectorized (and predicated) loads/store instructions | ||||
11826 | bool IsMemcpy = MI.getOpcode() == ARM::MVE_MEMCPYLOOPINST; | ||||
11827 | genTPLoopBody(TpLoopBody, TpEntry, TpExit, TII, dl, MRI, OpSrcReg, | ||||
11828 | OpDestReg, OpSizeReg, TotalIterationsReg, IsMemcpy); | ||||
11829 | |||||
11830 | // Required to avoid conflict with the MachineVerifier during testing. | ||||
11831 | Properties.reset(MachineFunctionProperties::Property::NoPHIs); | ||||
11832 | |||||
11833 | // Connect the blocks | ||||
11834 | TpEntry->addSuccessor(TpLoopBody); | ||||
11835 | TpLoopBody->addSuccessor(TpLoopBody); | ||||
11836 | TpLoopBody->addSuccessor(TpExit); | ||||
11837 | |||||
11838 | // Reorder for a more natural layout | ||||
11839 | TpLoopBody->moveAfter(TpEntry); | ||||
11840 | TpExit->moveAfter(TpLoopBody); | ||||
11841 | |||||
11842 | // Finally, remove the memcpy Psuedo Instruction | ||||
11843 | MI.eraseFromParent(); | ||||
11844 | |||||
11845 | // Return the exit block as it may contain other instructions requiring a | ||||
11846 | // custom inserter | ||||
11847 | return TpExit; | ||||
11848 | } | ||||
11849 | |||||
11850 | // The Thumb2 pre-indexed stores have the same MI operands, they just | ||||
11851 | // define them differently in the .td files from the isel patterns, so | ||||
11852 | // they need pseudos. | ||||
11853 | case ARM::t2STR_preidx: | ||||
11854 | MI.setDesc(TII->get(ARM::t2STR_PRE)); | ||||
11855 | return BB; | ||||
11856 | case ARM::t2STRB_preidx: | ||||
11857 | MI.setDesc(TII->get(ARM::t2STRB_PRE)); | ||||
11858 | return BB; | ||||
11859 | case ARM::t2STRH_preidx: | ||||
11860 | MI.setDesc(TII->get(ARM::t2STRH_PRE)); | ||||
11861 | return BB; | ||||
11862 | |||||
11863 | case ARM::STRi_preidx: | ||||
11864 | case ARM::STRBi_preidx: { | ||||
11865 | unsigned NewOpc = MI.getOpcode() == ARM::STRi_preidx ? ARM::STR_PRE_IMM | ||||
11866 | : ARM::STRB_PRE_IMM; | ||||
11867 | // Decode the offset. | ||||
11868 | unsigned Offset = MI.getOperand(4).getImm(); | ||||
11869 | bool isSub = ARM_AM::getAM2Op(Offset) == ARM_AM::sub; | ||||
11870 | Offset = ARM_AM::getAM2Offset(Offset); | ||||
11871 | if (isSub) | ||||
11872 | Offset = -Offset; | ||||
11873 | |||||
11874 | MachineMemOperand *MMO = *MI.memoperands_begin(); | ||||
11875 | BuildMI(*BB, MI, dl, TII->get(NewOpc)) | ||||
11876 | .add(MI.getOperand(0)) // Rn_wb | ||||
11877 | .add(MI.getOperand(1)) // Rt | ||||
11878 | .add(MI.getOperand(2)) // Rn | ||||
11879 | .addImm(Offset) // offset (skip GPR==zero_reg) | ||||
11880 | .add(MI.getOperand(5)) // pred | ||||
11881 | .add(MI.getOperand(6)) | ||||
11882 | .addMemOperand(MMO); | ||||
11883 | MI.eraseFromParent(); | ||||
11884 | return BB; | ||||
11885 | } | ||||
11886 | case ARM::STRr_preidx: | ||||
11887 | case ARM::STRBr_preidx: | ||||
11888 | case ARM::STRH_preidx: { | ||||
11889 | unsigned NewOpc; | ||||
11890 | switch (MI.getOpcode()) { | ||||
11891 | default: llvm_unreachable("unexpected opcode!")::llvm::llvm_unreachable_internal("unexpected opcode!", "llvm/lib/Target/ARM/ARMISelLowering.cpp" , 11891); | ||||
11892 | case ARM::STRr_preidx: NewOpc = ARM::STR_PRE_REG; break; | ||||
11893 | case ARM::STRBr_preidx: NewOpc = ARM::STRB_PRE_REG; break; | ||||
11894 | case ARM::STRH_preidx: NewOpc = ARM::STRH_PRE; break; | ||||
11895 | } | ||||
11896 | MachineInstrBuilder MIB = BuildMI(*BB, MI, dl, TII->get(NewOpc)); | ||||
11897 | for (const MachineOperand &MO : MI.operands()) | ||||
11898 | MIB.add(MO); | ||||
11899 | MI.eraseFromParent(); | ||||
11900 | return BB; | ||||
11901 | } | ||||
11902 | |||||
11903 | case ARM::tMOVCCr_pseudo: { | ||||
11904 | // To "insert" a SELECT_CC instruction, we actually have to insert the | ||||
11905 | // diamond control-flow pattern. The incoming instruction knows the | ||||
11906 | // destination vreg to set, the condition code register to branch on, the | ||||
11907 | // true/false values to select between, and a branch opcode to use. | ||||
11908 | const BasicBlock *LLVM_BB = BB->getBasicBlock(); | ||||
11909 | MachineFunction::iterator It = ++BB->getIterator(); | ||||
11910 | |||||
11911 | // thisMBB: | ||||
11912 | // ... | ||||
11913 | // TrueVal = ... | ||||
11914 | // cmpTY ccX, r1, r2 | ||||
11915 | // bCC copy1MBB | ||||
11916 | // fallthrough --> copy0MBB | ||||
11917 | MachineBasicBlock *thisMBB = BB; | ||||
11918 | MachineFunction *F = BB->getParent(); | ||||
11919 | MachineBasicBlock *copy0MBB = F->CreateMachineBasicBlock(LLVM_BB); | ||||
11920 | MachineBasicBlock *sinkMBB = F->CreateMachineBasicBlock(LLVM_BB); | ||||
11921 | F->insert(It, copy0MBB); | ||||
11922 | F->insert(It, sinkMBB); | ||||
11923 | |||||
11924 | // Check whether CPSR is live past the tMOVCCr_pseudo. | ||||
11925 | const TargetRegisterInfo *TRI = Subtarget->getRegisterInfo(); | ||||
11926 | if (!MI.killsRegister(ARM::CPSR) && | ||||
11927 | !checkAndUpdateCPSRKill(MI, thisMBB, TRI)) { | ||||
11928 | copy0MBB->addLiveIn(ARM::CPSR); | ||||
11929 | sinkMBB->addLiveIn(ARM::CPSR); | ||||
11930 | } | ||||
11931 | |||||
11932 | // Transfer the remainder of BB and its successor edges to sinkMBB. | ||||
11933 | sinkMBB->splice(sinkMBB->begin(), BB, | ||||
11934 | std::next(MachineBasicBlock::iterator(MI)), BB->end()); | ||||
11935 | sinkMBB->transferSuccessorsAndUpdatePHIs(BB); | ||||
11936 | |||||
11937 | BB->addSuccessor(copy0MBB); | ||||
11938 | BB->addSuccessor(sinkMBB); | ||||
11939 | |||||
11940 | BuildMI(BB, dl, TII->get(ARM::tBcc)) | ||||
11941 | .addMBB(sinkMBB) | ||||
11942 | .addImm(MI.getOperand(3).getImm()) | ||||
11943 | .addReg(MI.getOperand(4).getReg()); | ||||
11944 | |||||
11945 | // copy0MBB: | ||||
11946 | // %FalseValue = ... | ||||
11947 | // # fallthrough to sinkMBB | ||||
11948 | BB = copy0MBB; | ||||
11949 | |||||
11950 | // Update machine-CFG edges | ||||
11951 | BB->addSuccessor(sinkMBB); | ||||
11952 | |||||
11953 | // sinkMBB: | ||||
11954 | // %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ] | ||||
11955 | // ... | ||||
11956 | BB = sinkMBB; | ||||
11957 | BuildMI(*BB, BB->begin(), dl, TII->get(ARM::PHI), MI.getOperand(0).getReg()) | ||||
11958 | .addReg(MI.getOperand(1).getReg()) | ||||
11959 | .addMBB(copy0MBB) | ||||
11960 | .addReg(MI.getOperand(2).getReg()) | ||||
11961 | .addMBB(thisMBB); | ||||
11962 | |||||
11963 | MI.eraseFromParent(); // The pseudo instruction is gone now. | ||||
11964 | return BB; | ||||
11965 | } | ||||
11966 | |||||
11967 | case ARM::BCCi64: | ||||
11968 | case ARM::BCCZi64: { | ||||
11969 | // If there is an unconditional branch to the other successor, remove it. | ||||
11970 | BB->erase(std::next(MachineBasicBlock::iterator(MI)), BB->end()); | ||||
11971 | |||||
11972 | // Compare both parts that make up the double comparison separately for | ||||
11973 | // equality. | ||||
11974 | bool RHSisZero = MI.getOpcode() == ARM::BCCZi64; | ||||
11975 | |||||
11976 | Register LHS1 = MI.getOperand(1).getReg(); | ||||
11977 | Register LHS2 = MI.getOperand(2).getReg(); | ||||
11978 | if (RHSisZero) { | ||||
11979 | BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri)) | ||||
11980 | .addReg(LHS1) | ||||
11981 | .addImm(0) | ||||
11982 | .add(predOps(ARMCC::AL)); | ||||
11983 | BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri)) | ||||
11984 | .addReg(LHS2).addImm(0) | ||||
11985 | .addImm(ARMCC::EQ).addReg(ARM::CPSR); | ||||
11986 | } else { | ||||
11987 | Register RHS1 = MI.getOperand(3).getReg(); | ||||
11988 | Register RHS2 = MI.getOperand(4).getReg(); | ||||
11989 | BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPrr : ARM::CMPrr)) | ||||
11990 | .addReg(LHS1) | ||||
11991 | .addReg(RHS1) | ||||
11992 | .add(predOps(ARMCC::AL)); | ||||
11993 | BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPrr : ARM::CMPrr)) | ||||
11994 | .addReg(LHS2).addReg(RHS2) | ||||
11995 | .addImm(ARMCC::EQ).addReg(ARM::CPSR); | ||||
11996 | } | ||||
11997 | |||||
11998 | MachineBasicBlock *destMBB = MI.getOperand(RHSisZero ? 3 : 5).getMBB(); | ||||
11999 | MachineBasicBlock *exitMBB = OtherSucc(BB, destMBB); | ||||
12000 | if (MI.getOperand(0).getImm() == ARMCC::NE) | ||||
12001 | std::swap(destMBB, exitMBB); | ||||
12002 | |||||
12003 | BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc)) | ||||
12004 | .addMBB(destMBB).addImm(ARMCC::EQ).addReg(ARM::CPSR); | ||||
12005 | if (isThumb2) | ||||
12006 | BuildMI(BB, dl, TII->get(ARM::t2B)) | ||||
12007 | .addMBB(exitMBB) | ||||
12008 | .add(predOps(ARMCC::AL)); | ||||
12009 | else | ||||
12010 | BuildMI(BB, dl, TII->get(ARM::B)) .addMBB(exitMBB); | ||||
12011 | |||||
12012 | MI.eraseFromParent(); // The pseudo instruction is gone now. | ||||
12013 | return BB; | ||||
12014 | } | ||||
12015 | |||||
12016 | case ARM::Int_eh_sjlj_setjmp: | ||||
12017 | case ARM::Int_eh_sjlj_setjmp_nofp: | ||||
12018 | case ARM::tInt_eh_sjlj_setjmp: | ||||
12019 | case ARM::t2Int_eh_sjlj_setjmp: | ||||
12020 | case ARM::t2Int_eh_sjlj_setjmp_nofp: | ||||
12021 | return BB; | ||||
12022 | |||||
12023 | case ARM::Int_eh_sjlj_setup_dispatch: | ||||
12024 | EmitSjLjDispatchBlock(MI, BB); | ||||
12025 | return BB; | ||||
12026 | |||||
12027 | case ARM::ABS: | ||||
12028 | case ARM::t2ABS: { | ||||
12029 | // To insert an ABS instruction, we have to insert the | ||||
12030 | // diamond control-flow pattern. The incoming instruction knows the | ||||
12031 | // source vreg to test against 0, the destination vreg to set, | ||||
12032 | // the condition code register to branch on, the | ||||
12033 | // true/false values to select between, and a branch opcode to use. | ||||
12034 | // It transforms | ||||
12035 | // V1 = ABS V0 | ||||
12036 | // into | ||||
12037 | // V2 = MOVS V0 | ||||
12038 | // BCC (branch to SinkBB if V0 >= 0) | ||||
12039 | // RSBBB: V3 = RSBri V2, 0 (compute ABS if V2 < 0) | ||||
12040 | // SinkBB: V1 = PHI(V2, V3) | ||||
12041 | const BasicBlock *LLVM_BB = BB->getBasicBlock(); | ||||
12042 | MachineFunction::iterator BBI = ++BB->getIterator(); | ||||
12043 | MachineFunction *Fn = BB->getParent(); | ||||
12044 | MachineBasicBlock *RSBBB = Fn->CreateMachineBasicBlock(LLVM_BB); | ||||
12045 | MachineBasicBlock *SinkBB = Fn->CreateMachineBasicBlock(LLVM_BB); | ||||
12046 | Fn->insert(BBI, RSBBB); | ||||
12047 | Fn->insert(BBI, SinkBB); | ||||
12048 | |||||
12049 | Register ABSSrcReg = MI.getOperand(1).getReg(); | ||||
12050 | Register ABSDstReg = MI.getOperand(0).getReg(); | ||||
12051 | bool ABSSrcKIll = MI.getOperand(1).isKill(); | ||||
12052 | bool isThumb2 = Subtarget->isThumb2(); | ||||
12053 | MachineRegisterInfo &MRI = Fn->getRegInfo(); | ||||
12054 | // In Thumb mode S must not be specified if source register is the SP or | ||||
12055 | // PC and if destination register is the SP, so restrict register class | ||||
12056 | Register NewRsbDstReg = MRI.createVirtualRegister( | ||||
12057 | isThumb2 ? &ARM::rGPRRegClass : &ARM::GPRRegClass); | ||||
12058 | |||||
12059 | // Transfer the remainder of BB and its successor edges to sinkMBB. | ||||
12060 | SinkBB->splice(SinkBB->begin(), BB, | ||||
12061 | std::next(MachineBasicBlock::iterator(MI)), BB->end()); | ||||
12062 | SinkBB->transferSuccessorsAndUpdatePHIs(BB); | ||||
12063 | |||||
12064 | BB->addSuccessor(RSBBB); | ||||
12065 | BB->addSuccessor(SinkBB); | ||||
12066 | |||||
12067 | // fall through to SinkMBB | ||||
12068 | RSBBB->addSuccessor(SinkBB); | ||||
12069 | |||||
12070 | // insert a cmp at the end of BB | ||||
12071 | BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri)) | ||||
12072 | .addReg(ABSSrcReg) | ||||
12073 | .addImm(0) | ||||
12074 | .add(predOps(ARMCC::AL)); | ||||
12075 | |||||
12076 | // insert a bcc with opposite CC to ARMCC::MI at the end of BB | ||||
12077 | BuildMI(BB, dl, | ||||
12078 | TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc)).addMBB(SinkBB) | ||||
12079 | .addImm(ARMCC::getOppositeCondition(ARMCC::MI)).addReg(ARM::CPSR); | ||||
12080 | |||||
12081 | // insert rsbri in RSBBB | ||||
12082 | // Note: BCC and rsbri will be converted into predicated rsbmi | ||||
12083 | // by if-conversion pass | ||||
12084 | BuildMI(*RSBBB, RSBBB->begin(), dl, | ||||
12085 | TII->get(isThumb2 ? ARM::t2RSBri : ARM::RSBri), NewRsbDstReg) | ||||
12086 | .addReg(ABSSrcReg, ABSSrcKIll ? RegState::Kill : 0) | ||||
12087 | .addImm(0) | ||||
12088 | .add(predOps(ARMCC::AL)) | ||||
12089 | .add(condCodeOp()); | ||||
12090 | |||||
12091 | // insert PHI in SinkBB, | ||||
12092 | // reuse ABSDstReg to not change uses of ABS instruction | ||||
12093 | BuildMI(*SinkBB, SinkBB->begin(), dl, | ||||
12094 | TII->get(ARM::PHI), ABSDstReg) | ||||
12095 | .addReg(NewRsbDstReg).addMBB(RSBBB) | ||||
12096 | .addReg(ABSSrcReg).addMBB(BB); | ||||
12097 | |||||
12098 | // remove ABS instruction | ||||
12099 | MI.eraseFromParent(); | ||||
12100 | |||||
12101 | // return last added BB | ||||
12102 | return SinkBB; | ||||
12103 | } | ||||
12104 | case ARM::COPY_STRUCT_BYVAL_I32: | ||||
12105 | ++NumLoopByVals; | ||||
12106 | return EmitStructByval(MI, BB); | ||||
12107 | case ARM::WIN__CHKSTK: | ||||
12108 | return EmitLowered__chkstk(MI, BB); | ||||
12109 | case ARM::WIN__DBZCHK: | ||||
12110 | return EmitLowered__dbzchk(MI, BB); | ||||
12111 | } | ||||
12112 | } | ||||
12113 | |||||
12114 | /// Attaches vregs to MEMCPY that it will use as scratch registers | ||||
12115 | /// when it is expanded into LDM/STM. This is done as a post-isel lowering | ||||
12116 | /// instead of as a custom inserter because we need the use list from the SDNode. | ||||
12117 | static void attachMEMCPYScratchRegs(const ARMSubtarget *Subtarget, | ||||
12118 | MachineInstr &MI, const SDNode *Node) { | ||||
12119 | bool isThumb1 = Subtarget->isThumb1Only(); | ||||
12120 | |||||
12121 | DebugLoc DL = MI.getDebugLoc(); | ||||
12122 | MachineFunction *MF = MI.getParent()->getParent(); | ||||
12123 | MachineRegisterInfo &MRI = MF->getRegInfo(); | ||||
12124 | MachineInstrBuilder MIB(*MF, MI); | ||||
12125 | |||||
12126 | // If the new dst/src is unused mark it as dead. | ||||
12127 | if (!Node->hasAnyUseOfValue(0)) { | ||||
12128 | MI.getOperand(0).setIsDead(true); | ||||
12129 | } | ||||
12130 | if (!Node->hasAnyUseOfValue(1)) { | ||||
12131 | MI.getOperand(1).setIsDead(true); | ||||
12132 | } | ||||
12133 | |||||
12134 | // The MEMCPY both defines and kills the scratch registers. | ||||
12135 | for (unsigned I = 0; I != MI.getOperand(4).getImm(); ++I) { | ||||
12136 | Register TmpReg = MRI.createVirtualRegister(isThumb1 ? &ARM::tGPRRegClass | ||||
12137 | : &ARM::GPRRegClass); | ||||
12138 | MIB.addReg(TmpReg, RegState::Define|RegState::Dead); | ||||
12139 | } | ||||
12140 | } | ||||
12141 | |||||
12142 | void ARMTargetLowering::AdjustInstrPostInstrSelection(MachineInstr &MI, | ||||
12143 | SDNode *Node) const { | ||||
12144 | if (MI.getOpcode() == ARM::MEMCPY) { | ||||
12145 | attachMEMCPYScratchRegs(Subtarget, MI, Node); | ||||
12146 | return; | ||||
12147 | } | ||||
12148 | |||||
12149 | const MCInstrDesc *MCID = &MI.getDesc(); | ||||
12150 | // Adjust potentially 's' setting instructions after isel, i.e. ADC, SBC, RSB, | ||||
12151 | // RSC. Coming out of isel, they have an implicit CPSR def, but the optional | ||||
12152 | // operand is still set to noreg. If needed, set the optional operand's | ||||
12153 | // register to CPSR, and remove the redundant implicit def. | ||||
12154 | // | ||||
12155 | // e.g. ADCS (..., implicit-def CPSR) -> ADC (... opt:def CPSR). | ||||
12156 | |||||
12157 | // Rename pseudo opcodes. | ||||
12158 | unsigned NewOpc = convertAddSubFlagsOpcode(MI.getOpcode()); | ||||
12159 | unsigned ccOutIdx; | ||||
12160 | if (NewOpc) { | ||||
12161 | const ARMBaseInstrInfo *TII = Subtarget->getInstrInfo(); | ||||
12162 | MCID = &TII->get(NewOpc); | ||||
12163 | |||||
12164 | assert(MCID->getNumOperands() ==(static_cast <bool> (MCID->getNumOperands() == MI.getDesc ().getNumOperands() + 5 - MI.getDesc().getSize() && "converted opcode should be the same except for cc_out" " (and, on Thumb1, pred)") ? void (0) : __assert_fail ("MCID->getNumOperands() == MI.getDesc().getNumOperands() + 5 - MI.getDesc().getSize() && \"converted opcode should be the same except for cc_out\" \" (and, on Thumb1, pred)\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 12167, __extension__ __PRETTY_FUNCTION__)) | ||||
12165 | MI.getDesc().getNumOperands() + 5 - MI.getDesc().getSize()(static_cast <bool> (MCID->getNumOperands() == MI.getDesc ().getNumOperands() + 5 - MI.getDesc().getSize() && "converted opcode should be the same except for cc_out" " (and, on Thumb1, pred)") ? void (0) : __assert_fail ("MCID->getNumOperands() == MI.getDesc().getNumOperands() + 5 - MI.getDesc().getSize() && \"converted opcode should be the same except for cc_out\" \" (and, on Thumb1, pred)\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 12167, __extension__ __PRETTY_FUNCTION__)) | ||||
12166 | && "converted opcode should be the same except for cc_out"(static_cast <bool> (MCID->getNumOperands() == MI.getDesc ().getNumOperands() + 5 - MI.getDesc().getSize() && "converted opcode should be the same except for cc_out" " (and, on Thumb1, pred)") ? void (0) : __assert_fail ("MCID->getNumOperands() == MI.getDesc().getNumOperands() + 5 - MI.getDesc().getSize() && \"converted opcode should be the same except for cc_out\" \" (and, on Thumb1, pred)\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 12167, __extension__ __PRETTY_FUNCTION__)) | ||||
12167 | " (and, on Thumb1, pred)")(static_cast <bool> (MCID->getNumOperands() == MI.getDesc ().getNumOperands() + 5 - MI.getDesc().getSize() && "converted opcode should be the same except for cc_out" " (and, on Thumb1, pred)") ? void (0) : __assert_fail ("MCID->getNumOperands() == MI.getDesc().getNumOperands() + 5 - MI.getDesc().getSize() && \"converted opcode should be the same except for cc_out\" \" (and, on Thumb1, pred)\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 12167, __extension__ __PRETTY_FUNCTION__)); | ||||
12168 | |||||
12169 | MI.setDesc(*MCID); | ||||
12170 | |||||
12171 | // Add the optional cc_out operand | ||||
12172 | MI.addOperand(MachineOperand::CreateReg(0, /*isDef=*/true)); | ||||
12173 | |||||
12174 | // On Thumb1, move all input operands to the end, then add the predicate | ||||
12175 | if (Subtarget->isThumb1Only()) { | ||||
12176 | for (unsigned c = MCID->getNumOperands() - 4; c--;) { | ||||
12177 | MI.addOperand(MI.getOperand(1)); | ||||
12178 | MI.removeOperand(1); | ||||
12179 | } | ||||
12180 | |||||
12181 | // Restore the ties | ||||
12182 | for (unsigned i = MI.getNumOperands(); i--;) { | ||||
12183 | const MachineOperand& op = MI.getOperand(i); | ||||
12184 | if (op.isReg() && op.isUse()) { | ||||
12185 | int DefIdx = MCID->getOperandConstraint(i, MCOI::TIED_TO); | ||||
12186 | if (DefIdx != -1) | ||||
12187 | MI.tieOperands(DefIdx, i); | ||||
12188 | } | ||||
12189 | } | ||||
12190 | |||||
12191 | MI.addOperand(MachineOperand::CreateImm(ARMCC::AL)); | ||||
12192 | MI.addOperand(MachineOperand::CreateReg(0, /*isDef=*/false)); | ||||
12193 | ccOutIdx = 1; | ||||
12194 | } else | ||||
12195 | ccOutIdx = MCID->getNumOperands() - 1; | ||||
12196 | } else | ||||
12197 | ccOutIdx = MCID->getNumOperands() - 1; | ||||
12198 | |||||
12199 | // Any ARM instruction that sets the 's' bit should specify an optional | ||||
12200 | // "cc_out" operand in the last operand position. | ||||
12201 | if (!MI.hasOptionalDef() || !MCID->OpInfo[ccOutIdx].isOptionalDef()) { | ||||
12202 | assert(!NewOpc && "Optional cc_out operand required")(static_cast <bool> (!NewOpc && "Optional cc_out operand required" ) ? void (0) : __assert_fail ("!NewOpc && \"Optional cc_out operand required\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 12202, __extension__ __PRETTY_FUNCTION__)); | ||||
12203 | return; | ||||
12204 | } | ||||
12205 | // Look for an implicit def of CPSR added by MachineInstr ctor. Remove it | ||||
12206 | // since we already have an optional CPSR def. | ||||
12207 | bool definesCPSR = false; | ||||
12208 | bool deadCPSR = false; | ||||
12209 | for (unsigned i = MCID->getNumOperands(), e = MI.getNumOperands(); i != e; | ||||
12210 | ++i) { | ||||
12211 | const MachineOperand &MO = MI.getOperand(i); | ||||
12212 | if (MO.isReg() && MO.isDef() && MO.getReg() == ARM::CPSR) { | ||||
12213 | definesCPSR = true; | ||||
12214 | if (MO.isDead()) | ||||
12215 | deadCPSR = true; | ||||
12216 | MI.removeOperand(i); | ||||
12217 | break; | ||||
12218 | } | ||||
12219 | } | ||||
12220 | if (!definesCPSR) { | ||||
12221 | assert(!NewOpc && "Optional cc_out operand required")(static_cast <bool> (!NewOpc && "Optional cc_out operand required" ) ? void (0) : __assert_fail ("!NewOpc && \"Optional cc_out operand required\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 12221, __extension__ __PRETTY_FUNCTION__)); | ||||
12222 | return; | ||||
12223 | } | ||||
12224 | assert(deadCPSR == !Node->hasAnyUseOfValue(1) && "inconsistent dead flag")(static_cast <bool> (deadCPSR == !Node->hasAnyUseOfValue (1) && "inconsistent dead flag") ? void (0) : __assert_fail ("deadCPSR == !Node->hasAnyUseOfValue(1) && \"inconsistent dead flag\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 12224, __extension__ __PRETTY_FUNCTION__)); | ||||
12225 | if (deadCPSR) { | ||||
12226 | assert(!MI.getOperand(ccOutIdx).getReg() &&(static_cast <bool> (!MI.getOperand(ccOutIdx).getReg() && "expect uninitialized optional cc_out operand") ? void (0) : __assert_fail ("!MI.getOperand(ccOutIdx).getReg() && \"expect uninitialized optional cc_out operand\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 12227, __extension__ __PRETTY_FUNCTION__)) | ||||
12227 | "expect uninitialized optional cc_out operand")(static_cast <bool> (!MI.getOperand(ccOutIdx).getReg() && "expect uninitialized optional cc_out operand") ? void (0) : __assert_fail ("!MI.getOperand(ccOutIdx).getReg() && \"expect uninitialized optional cc_out operand\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 12227, __extension__ __PRETTY_FUNCTION__)); | ||||
12228 | // Thumb1 instructions must have the S bit even if the CPSR is dead. | ||||
12229 | if (!Subtarget->isThumb1Only()) | ||||
12230 | return; | ||||
12231 | } | ||||
12232 | |||||
12233 | // If this instruction was defined with an optional CPSR def and its dag node | ||||
12234 | // had a live implicit CPSR def, then activate the optional CPSR def. | ||||
12235 | MachineOperand &MO = MI.getOperand(ccOutIdx); | ||||
12236 | MO.setReg(ARM::CPSR); | ||||
12237 | MO.setIsDef(true); | ||||
12238 | } | ||||
12239 | |||||
12240 | //===----------------------------------------------------------------------===// | ||||
12241 | // ARM Optimization Hooks | ||||
12242 | //===----------------------------------------------------------------------===// | ||||
12243 | |||||
12244 | // Helper function that checks if N is a null or all ones constant. | ||||
12245 | static inline bool isZeroOrAllOnes(SDValue N, bool AllOnes) { | ||||
12246 | return AllOnes ? isAllOnesConstant(N) : isNullConstant(N); | ||||
12247 | } | ||||
12248 | |||||
12249 | // Return true if N is conditionally 0 or all ones. | ||||
12250 | // Detects these expressions where cc is an i1 value: | ||||
12251 | // | ||||
12252 | // (select cc 0, y) [AllOnes=0] | ||||
12253 | // (select cc y, 0) [AllOnes=0] | ||||
12254 | // (zext cc) [AllOnes=0] | ||||
12255 | // (sext cc) [AllOnes=0/1] | ||||
12256 | // (select cc -1, y) [AllOnes=1] | ||||
12257 | // (select cc y, -1) [AllOnes=1] | ||||
12258 | // | ||||
12259 | // Invert is set when N is the null/all ones constant when CC is false. | ||||
12260 | // OtherOp is set to the alternative value of N. | ||||
12261 | static bool isConditionalZeroOrAllOnes(SDNode *N, bool AllOnes, | ||||
12262 | SDValue &CC, bool &Invert, | ||||
12263 | SDValue &OtherOp, | ||||
12264 | SelectionDAG &DAG) { | ||||
12265 | switch (N->getOpcode()) { | ||||
12266 | default: return false; | ||||
12267 | case ISD::SELECT: { | ||||
12268 | CC = N->getOperand(0); | ||||
12269 | SDValue N1 = N->getOperand(1); | ||||
12270 | SDValue N2 = N->getOperand(2); | ||||
12271 | if (isZeroOrAllOnes(N1, AllOnes)) { | ||||
12272 | Invert = false; | ||||
12273 | OtherOp = N2; | ||||
12274 | return true; | ||||
12275 | } | ||||
12276 | if (isZeroOrAllOnes(N2, AllOnes)) { | ||||
12277 | Invert = true; | ||||
12278 | OtherOp = N1; | ||||
12279 | return true; | ||||
12280 | } | ||||
12281 | return false; | ||||
12282 | } | ||||
12283 | case ISD::ZERO_EXTEND: | ||||
12284 | // (zext cc) can never be the all ones value. | ||||
12285 | if (AllOnes) | ||||
12286 | return false; | ||||
12287 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||
12288 | case ISD::SIGN_EXTEND: { | ||||
12289 | SDLoc dl(N); | ||||
12290 | EVT VT = N->getValueType(0); | ||||
12291 | CC = N->getOperand(0); | ||||
12292 | if (CC.getValueType() != MVT::i1 || CC.getOpcode() != ISD::SETCC) | ||||
12293 | return false; | ||||
12294 | Invert = !AllOnes; | ||||
12295 | if (AllOnes) | ||||
12296 | // When looking for an AllOnes constant, N is an sext, and the 'other' | ||||
12297 | // value is 0. | ||||
12298 | OtherOp = DAG.getConstant(0, dl, VT); | ||||
12299 | else if (N->getOpcode() == ISD::ZERO_EXTEND) | ||||
12300 | // When looking for a 0 constant, N can be zext or sext. | ||||
12301 | OtherOp = DAG.getConstant(1, dl, VT); | ||||
12302 | else | ||||
12303 | OtherOp = DAG.getAllOnesConstant(dl, VT); | ||||
12304 | return true; | ||||
12305 | } | ||||
12306 | } | ||||
12307 | } | ||||
12308 | |||||
12309 | // Combine a constant select operand into its use: | ||||
12310 | // | ||||
12311 | // (add (select cc, 0, c), x) -> (select cc, x, (add, x, c)) | ||||
12312 | // (sub x, (select cc, 0, c)) -> (select cc, x, (sub, x, c)) | ||||
12313 | // (and (select cc, -1, c), x) -> (select cc, x, (and, x, c)) [AllOnes=1] | ||||
12314 | // (or (select cc, 0, c), x) -> (select cc, x, (or, x, c)) | ||||
12315 | // (xor (select cc, 0, c), x) -> (select cc, x, (xor, x, c)) | ||||
12316 | // | ||||
12317 | // The transform is rejected if the select doesn't have a constant operand that | ||||
12318 | // is null, or all ones when AllOnes is set. | ||||
12319 | // | ||||
12320 | // Also recognize sext/zext from i1: | ||||
12321 | // | ||||
12322 | // (add (zext cc), x) -> (select cc (add x, 1), x) | ||||
12323 | // (add (sext cc), x) -> (select cc (add x, -1), x) | ||||
12324 | // | ||||
12325 | // These transformations eventually create predicated instructions. | ||||
12326 | // | ||||
12327 | // @param N The node to transform. | ||||
12328 | // @param Slct The N operand that is a select. | ||||
12329 | // @param OtherOp The other N operand (x above). | ||||
12330 | // @param DCI Context. | ||||
12331 | // @param AllOnes Require the select constant to be all ones instead of null. | ||||
12332 | // @returns The new node, or SDValue() on failure. | ||||
12333 | static | ||||
12334 | SDValue combineSelectAndUse(SDNode *N, SDValue Slct, SDValue OtherOp, | ||||
12335 | TargetLowering::DAGCombinerInfo &DCI, | ||||
12336 | bool AllOnes = false) { | ||||
12337 | SelectionDAG &DAG = DCI.DAG; | ||||
12338 | EVT VT = N->getValueType(0); | ||||
12339 | SDValue NonConstantVal; | ||||
12340 | SDValue CCOp; | ||||
12341 | bool SwapSelectOps; | ||||
12342 | if (!isConditionalZeroOrAllOnes(Slct.getNode(), AllOnes, CCOp, SwapSelectOps, | ||||
12343 | NonConstantVal, DAG)) | ||||
12344 | return SDValue(); | ||||
12345 | |||||
12346 | // Slct is now know to be the desired identity constant when CC is true. | ||||
12347 | SDValue TrueVal = OtherOp; | ||||
12348 | SDValue FalseVal = DAG.getNode(N->getOpcode(), SDLoc(N), VT, | ||||
12349 | OtherOp, NonConstantVal); | ||||
12350 | // Unless SwapSelectOps says CC should be false. | ||||
12351 | if (SwapSelectOps) | ||||
12352 | std::swap(TrueVal, FalseVal); | ||||
12353 | |||||
12354 | return DAG.getNode(ISD::SELECT, SDLoc(N), VT, | ||||
12355 | CCOp, TrueVal, FalseVal); | ||||
12356 | } | ||||
12357 | |||||
12358 | // Attempt combineSelectAndUse on each operand of a commutative operator N. | ||||
12359 | static | ||||
12360 | SDValue combineSelectAndUseCommutative(SDNode *N, bool AllOnes, | ||||
12361 | TargetLowering::DAGCombinerInfo &DCI) { | ||||
12362 | SDValue N0 = N->getOperand(0); | ||||
12363 | SDValue N1 = N->getOperand(1); | ||||
12364 | if (N0.getNode()->hasOneUse()) | ||||
12365 | if (SDValue Result = combineSelectAndUse(N, N0, N1, DCI, AllOnes)) | ||||
12366 | return Result; | ||||
12367 | if (N1.getNode()->hasOneUse()) | ||||
12368 | if (SDValue Result = combineSelectAndUse(N, N1, N0, DCI, AllOnes)) | ||||
12369 | return Result; | ||||
12370 | return SDValue(); | ||||
12371 | } | ||||
12372 | |||||
12373 | static bool IsVUZPShuffleNode(SDNode *N) { | ||||
12374 | // VUZP shuffle node. | ||||
12375 | if (N->getOpcode() == ARMISD::VUZP) | ||||
12376 | return true; | ||||
12377 | |||||
12378 | // "VUZP" on i32 is an alias for VTRN. | ||||
12379 | if (N->getOpcode() == ARMISD::VTRN && N->getValueType(0) == MVT::v2i32) | ||||
12380 | return true; | ||||
12381 | |||||
12382 | return false; | ||||
12383 | } | ||||
12384 | |||||
12385 | static SDValue AddCombineToVPADD(SDNode *N, SDValue N0, SDValue N1, | ||||
12386 | TargetLowering::DAGCombinerInfo &DCI, | ||||
12387 | const ARMSubtarget *Subtarget) { | ||||
12388 | // Look for ADD(VUZP.0, VUZP.1). | ||||
12389 | if (!IsVUZPShuffleNode(N0.getNode()) || N0.getNode() != N1.getNode() || | ||||
12390 | N0 == N1) | ||||
12391 | return SDValue(); | ||||
12392 | |||||
12393 | // Make sure the ADD is a 64-bit add; there is no 128-bit VPADD. | ||||
12394 | if (!N->getValueType(0).is64BitVector()) | ||||
12395 | return SDValue(); | ||||
12396 | |||||
12397 | // Generate vpadd. | ||||
12398 | SelectionDAG &DAG = DCI.DAG; | ||||
12399 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | ||||
12400 | SDLoc dl(N); | ||||
12401 | SDNode *Unzip = N0.getNode(); | ||||
12402 | EVT VT = N->getValueType(0); | ||||
12403 | |||||
12404 | SmallVector<SDValue, 8> Ops; | ||||
12405 | Ops.push_back(DAG.getConstant(Intrinsic::arm_neon_vpadd, dl, | ||||
12406 | TLI.getPointerTy(DAG.getDataLayout()))); | ||||
12407 | Ops.push_back(Unzip->getOperand(0)); | ||||
12408 | Ops.push_back(Unzip->getOperand(1)); | ||||
12409 | |||||
12410 | return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT, Ops); | ||||
12411 | } | ||||
12412 | |||||
12413 | static SDValue AddCombineVUZPToVPADDL(SDNode *N, SDValue N0, SDValue N1, | ||||
12414 | TargetLowering::DAGCombinerInfo &DCI, | ||||
12415 | const ARMSubtarget *Subtarget) { | ||||
12416 | // Check for two extended operands. | ||||
12417 | if (!(N0.getOpcode() == ISD::SIGN_EXTEND && | ||||
12418 | N1.getOpcode() == ISD::SIGN_EXTEND) && | ||||
12419 | !(N0.getOpcode() == ISD::ZERO_EXTEND && | ||||
12420 | N1.getOpcode() == ISD::ZERO_EXTEND)) | ||||
12421 | return SDValue(); | ||||
12422 | |||||
12423 | SDValue N00 = N0.getOperand(0); | ||||
12424 | SDValue N10 = N1.getOperand(0); | ||||
12425 | |||||
12426 | // Look for ADD(SEXT(VUZP.0), SEXT(VUZP.1)) | ||||
12427 | if (!IsVUZPShuffleNode(N00.getNode()) || N00.getNode() != N10.getNode() || | ||||
12428 | N00 == N10) | ||||
12429 | return SDValue(); | ||||
12430 | |||||
12431 | // We only recognize Q register paddl here; this can't be reached until | ||||
12432 | // after type legalization. | ||||
12433 | if (!N00.getValueType().is64BitVector() || | ||||
12434 | !N0.getValueType().is128BitVector()) | ||||
12435 | return SDValue(); | ||||
12436 | |||||
12437 | // Generate vpaddl. | ||||
12438 | SelectionDAG &DAG = DCI.DAG; | ||||
12439 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | ||||
12440 | SDLoc dl(N); | ||||
12441 | EVT VT = N->getValueType(0); | ||||
12442 | |||||
12443 | SmallVector<SDValue, 8> Ops; | ||||
12444 | // Form vpaddl.sN or vpaddl.uN depending on the kind of extension. | ||||
12445 | unsigned Opcode; | ||||
12446 | if (N0.getOpcode() == ISD::SIGN_EXTEND) | ||||
12447 | Opcode = Intrinsic::arm_neon_vpaddls; | ||||
12448 | else | ||||
12449 | Opcode = Intrinsic::arm_neon_vpaddlu; | ||||
12450 | Ops.push_back(DAG.getConstant(Opcode, dl, | ||||
12451 | TLI.getPointerTy(DAG.getDataLayout()))); | ||||
12452 | EVT ElemTy = N00.getValueType().getVectorElementType(); | ||||
12453 | unsigned NumElts = VT.getVectorNumElements(); | ||||
12454 | EVT ConcatVT = EVT::getVectorVT(*DAG.getContext(), ElemTy, NumElts * 2); | ||||
12455 | SDValue Concat = DAG.getNode(ISD::CONCAT_VECTORS, SDLoc(N), ConcatVT, | ||||
12456 | N00.getOperand(0), N00.getOperand(1)); | ||||
12457 | Ops.push_back(Concat); | ||||
12458 | |||||
12459 | return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT, Ops); | ||||
12460 | } | ||||
12461 | |||||
12462 | // FIXME: This function shouldn't be necessary; if we lower BUILD_VECTOR in | ||||
12463 | // an appropriate manner, we end up with ADD(VUZP(ZEXT(N))), which is | ||||
12464 | // much easier to match. | ||||
12465 | static SDValue | ||||
12466 | AddCombineBUILD_VECTORToVPADDL(SDNode *N, SDValue N0, SDValue N1, | ||||
12467 | TargetLowering::DAGCombinerInfo &DCI, | ||||
12468 | const ARMSubtarget *Subtarget) { | ||||
12469 | // Only perform optimization if after legalize, and if NEON is available. We | ||||
12470 | // also expected both operands to be BUILD_VECTORs. | ||||
12471 | if (DCI.isBeforeLegalize() || !Subtarget->hasNEON() | ||||
12472 | || N0.getOpcode() != ISD::BUILD_VECTOR | ||||
12473 | || N1.getOpcode() != ISD::BUILD_VECTOR) | ||||
12474 | return SDValue(); | ||||
12475 | |||||
12476 | // Check output type since VPADDL operand elements can only be 8, 16, or 32. | ||||
12477 | EVT VT = N->getValueType(0); | ||||
12478 | if (!VT.isInteger() || VT.getVectorElementType() == MVT::i64) | ||||
12479 | return SDValue(); | ||||
12480 | |||||
12481 | // Check that the vector operands are of the right form. | ||||
12482 | // N0 and N1 are BUILD_VECTOR nodes with N number of EXTRACT_VECTOR | ||||
12483 | // operands, where N is the size of the formed vector. | ||||
12484 | // Each EXTRACT_VECTOR should have the same input vector and odd or even | ||||
12485 | // index such that we have a pair wise add pattern. | ||||
12486 | |||||
12487 | // Grab the vector that all EXTRACT_VECTOR nodes should be referencing. | ||||
12488 | if (N0->getOperand(0)->getOpcode() != ISD::EXTRACT_VECTOR_ELT) | ||||
12489 | return SDValue(); | ||||
12490 | SDValue Vec = N0->getOperand(0)->getOperand(0); | ||||
12491 | SDNode *V = Vec.getNode(); | ||||
12492 | unsigned nextIndex = 0; | ||||
12493 | |||||
12494 | // For each operands to the ADD which are BUILD_VECTORs, | ||||
12495 | // check to see if each of their operands are an EXTRACT_VECTOR with | ||||
12496 | // the same vector and appropriate index. | ||||
12497 | for (unsigned i = 0, e = N0->getNumOperands(); i != e; ++i) { | ||||
12498 | if (N0->getOperand(i)->getOpcode() == ISD::EXTRACT_VECTOR_ELT | ||||
12499 | && N1->getOperand(i)->getOpcode() == ISD::EXTRACT_VECTOR_ELT) { | ||||
12500 | |||||
12501 | SDValue ExtVec0 = N0->getOperand(i); | ||||
12502 | SDValue ExtVec1 = N1->getOperand(i); | ||||
12503 | |||||
12504 | // First operand is the vector, verify its the same. | ||||
12505 | if (V != ExtVec0->getOperand(0).getNode() || | ||||
12506 | V != ExtVec1->getOperand(0).getNode()) | ||||
12507 | return SDValue(); | ||||
12508 | |||||
12509 | // Second is the constant, verify its correct. | ||||
12510 | ConstantSDNode *C0 = dyn_cast<ConstantSDNode>(ExtVec0->getOperand(1)); | ||||
12511 | ConstantSDNode *C1 = dyn_cast<ConstantSDNode>(ExtVec1->getOperand(1)); | ||||
12512 | |||||
12513 | // For the constant, we want to see all the even or all the odd. | ||||
12514 | if (!C0 || !C1 || C0->getZExtValue() != nextIndex | ||||
12515 | || C1->getZExtValue() != nextIndex+1) | ||||
12516 | return SDValue(); | ||||
12517 | |||||
12518 | // Increment index. | ||||
12519 | nextIndex+=2; | ||||
12520 | } else | ||||
12521 | return SDValue(); | ||||
12522 | } | ||||
12523 | |||||
12524 | // Don't generate vpaddl+vmovn; we'll match it to vpadd later. Also make sure | ||||
12525 | // we're using the entire input vector, otherwise there's a size/legality | ||||
12526 | // mismatch somewhere. | ||||
12527 | if (nextIndex != Vec.getValueType().getVectorNumElements() || | ||||
12528 | Vec.getValueType().getVectorElementType() == VT.getVectorElementType()) | ||||
12529 | return SDValue(); | ||||
12530 | |||||
12531 | // Create VPADDL node. | ||||
12532 | SelectionDAG &DAG = DCI.DAG; | ||||
12533 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | ||||
12534 | |||||
12535 | SDLoc dl(N); | ||||
12536 | |||||
12537 | // Build operand list. | ||||
12538 | SmallVector<SDValue, 8> Ops; | ||||
12539 | Ops.push_back(DAG.getConstant(Intrinsic::arm_neon_vpaddls, dl, | ||||
12540 | TLI.getPointerTy(DAG.getDataLayout()))); | ||||
12541 | |||||
12542 | // Input is the vector. | ||||
12543 | Ops.push_back(Vec); | ||||
12544 | |||||
12545 | // Get widened type and narrowed type. | ||||
12546 | MVT widenType; | ||||
12547 | unsigned numElem = VT.getVectorNumElements(); | ||||
12548 | |||||
12549 | EVT inputLaneType = Vec.getValueType().getVectorElementType(); | ||||
12550 | switch (inputLaneType.getSimpleVT().SimpleTy) { | ||||
12551 | case MVT::i8: widenType = MVT::getVectorVT(MVT::i16, numElem); break; | ||||
12552 | case MVT::i16: widenType = MVT::getVectorVT(MVT::i32, numElem); break; | ||||
12553 | case MVT::i32: widenType = MVT::getVectorVT(MVT::i64, numElem); break; | ||||
12554 | default: | ||||
12555 | llvm_unreachable("Invalid vector element type for padd optimization.")::llvm::llvm_unreachable_internal("Invalid vector element type for padd optimization." , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 12555); | ||||
12556 | } | ||||
12557 | |||||
12558 | SDValue tmp = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, widenType, Ops); | ||||
12559 | unsigned ExtOp = VT.bitsGT(tmp.getValueType()) ? ISD::ANY_EXTEND : ISD::TRUNCATE; | ||||
12560 | return DAG.getNode(ExtOp, dl, VT, tmp); | ||||
12561 | } | ||||
12562 | |||||
12563 | static SDValue findMUL_LOHI(SDValue V) { | ||||
12564 | if (V->getOpcode() == ISD::UMUL_LOHI || | ||||
12565 | V->getOpcode() == ISD::SMUL_LOHI) | ||||
12566 | return V; | ||||
12567 | return SDValue(); | ||||
12568 | } | ||||
12569 | |||||
12570 | static SDValue AddCombineTo64BitSMLAL16(SDNode *AddcNode, SDNode *AddeNode, | ||||
12571 | TargetLowering::DAGCombinerInfo &DCI, | ||||
12572 | const ARMSubtarget *Subtarget) { | ||||
12573 | if (!Subtarget->hasBaseDSP()) | ||||
12574 | return SDValue(); | ||||
12575 | |||||
12576 | // SMLALBB, SMLALBT, SMLALTB, SMLALTT multiply two 16-bit values and | ||||
12577 | // accumulates the product into a 64-bit value. The 16-bit values will | ||||
12578 | // be sign extended somehow or SRA'd into 32-bit values | ||||
12579 | // (addc (adde (mul 16bit, 16bit), lo), hi) | ||||
12580 | SDValue Mul = AddcNode->getOperand(0); | ||||
12581 | SDValue Lo = AddcNode->getOperand(1); | ||||
12582 | if (Mul.getOpcode() != ISD::MUL) { | ||||
12583 | Lo = AddcNode->getOperand(0); | ||||
12584 | Mul = AddcNode->getOperand(1); | ||||
12585 | if (Mul.getOpcode() != ISD::MUL) | ||||
12586 | return SDValue(); | ||||
12587 | } | ||||
12588 | |||||
12589 | SDValue SRA = AddeNode->getOperand(0); | ||||
12590 | SDValue Hi = AddeNode->getOperand(1); | ||||
12591 | if (SRA.getOpcode() != ISD::SRA) { | ||||
12592 | SRA = AddeNode->getOperand(1); | ||||
12593 | Hi = AddeNode->getOperand(0); | ||||
12594 | if (SRA.getOpcode() != ISD::SRA) | ||||
12595 | return SDValue(); | ||||
12596 | } | ||||
12597 | if (auto Const = dyn_cast<ConstantSDNode>(SRA.getOperand(1))) { | ||||
12598 | if (Const->getZExtValue() != 31) | ||||
12599 | return SDValue(); | ||||
12600 | } else | ||||
12601 | return SDValue(); | ||||
12602 | |||||
12603 | if (SRA.getOperand(0) != Mul) | ||||
12604 | return SDValue(); | ||||
12605 | |||||
12606 | SelectionDAG &DAG = DCI.DAG; | ||||
12607 | SDLoc dl(AddcNode); | ||||
12608 | unsigned Opcode = 0; | ||||
12609 | SDValue Op0; | ||||
12610 | SDValue Op1; | ||||
12611 | |||||
12612 | if (isS16(Mul.getOperand(0), DAG) && isS16(Mul.getOperand(1), DAG)) { | ||||
12613 | Opcode = ARMISD::SMLALBB; | ||||
12614 | Op0 = Mul.getOperand(0); | ||||
12615 | Op1 = Mul.getOperand(1); | ||||
12616 | } else if (isS16(Mul.getOperand(0), DAG) && isSRA16(Mul.getOperand(1))) { | ||||
12617 | Opcode = ARMISD::SMLALBT; | ||||
12618 | Op0 = Mul.getOperand(0); | ||||
12619 | Op1 = Mul.getOperand(1).getOperand(0); | ||||
12620 | } else if (isSRA16(Mul.getOperand(0)) && isS16(Mul.getOperand(1), DAG)) { | ||||
12621 | Opcode = ARMISD::SMLALTB; | ||||
12622 | Op0 = Mul.getOperand(0).getOperand(0); | ||||
12623 | Op1 = Mul.getOperand(1); | ||||
12624 | } else if (isSRA16(Mul.getOperand(0)) && isSRA16(Mul.getOperand(1))) { | ||||
12625 | Opcode = ARMISD::SMLALTT; | ||||
12626 | Op0 = Mul->getOperand(0).getOperand(0); | ||||
12627 | Op1 = Mul->getOperand(1).getOperand(0); | ||||
12628 | } | ||||
12629 | |||||
12630 | if (!Op0 || !Op1) | ||||
12631 | return SDValue(); | ||||
12632 | |||||
12633 | SDValue SMLAL = DAG.getNode(Opcode, dl, DAG.getVTList(MVT::i32, MVT::i32), | ||||
12634 | Op0, Op1, Lo, Hi); | ||||
12635 | // Replace the ADDs' nodes uses by the MLA node's values. | ||||
12636 | SDValue HiMLALResult(SMLAL.getNode(), 1); | ||||
12637 | SDValue LoMLALResult(SMLAL.getNode(), 0); | ||||
12638 | |||||
12639 | DAG.ReplaceAllUsesOfValueWith(SDValue(AddcNode, 0), LoMLALResult); | ||||
12640 | DAG.ReplaceAllUsesOfValueWith(SDValue(AddeNode, 0), HiMLALResult); | ||||
12641 | |||||
12642 | // Return original node to notify the driver to stop replacing. | ||||
12643 | SDValue resNode(AddcNode, 0); | ||||
12644 | return resNode; | ||||
12645 | } | ||||
12646 | |||||
12647 | static SDValue AddCombineTo64bitMLAL(SDNode *AddeSubeNode, | ||||
12648 | TargetLowering::DAGCombinerInfo &DCI, | ||||
12649 | const ARMSubtarget *Subtarget) { | ||||
12650 | // Look for multiply add opportunities. | ||||
12651 | // The pattern is a ISD::UMUL_LOHI followed by two add nodes, where | ||||
12652 | // each add nodes consumes a value from ISD::UMUL_LOHI and there is | ||||
12653 | // a glue link from the first add to the second add. | ||||
12654 | // If we find this pattern, we can replace the U/SMUL_LOHI, ADDC, and ADDE by | ||||
12655 | // a S/UMLAL instruction. | ||||
12656 | // UMUL_LOHI | ||||
12657 | // / :lo \ :hi | ||||
12658 | // V \ [no multiline comment] | ||||
12659 | // loAdd -> ADDC | | ||||
12660 | // \ :carry / | ||||
12661 | // V V | ||||
12662 | // ADDE <- hiAdd | ||||
12663 | // | ||||
12664 | // In the special case where only the higher part of a signed result is used | ||||
12665 | // and the add to the low part of the result of ISD::UMUL_LOHI adds or subtracts | ||||
12666 | // a constant with the exact value of 0x80000000, we recognize we are dealing | ||||
12667 | // with a "rounded multiply and add" (or subtract) and transform it into | ||||
12668 | // either a ARMISD::SMMLAR or ARMISD::SMMLSR respectively. | ||||
12669 | |||||
12670 | assert((AddeSubeNode->getOpcode() == ARMISD::ADDE ||(static_cast <bool> ((AddeSubeNode->getOpcode() == ARMISD ::ADDE || AddeSubeNode->getOpcode() == ARMISD::SUBE) && "Expect an ADDE or SUBE") ? void (0) : __assert_fail ("(AddeSubeNode->getOpcode() == ARMISD::ADDE || AddeSubeNode->getOpcode() == ARMISD::SUBE) && \"Expect an ADDE or SUBE\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 12672, __extension__ __PRETTY_FUNCTION__)) | ||||
12671 | AddeSubeNode->getOpcode() == ARMISD::SUBE) &&(static_cast <bool> ((AddeSubeNode->getOpcode() == ARMISD ::ADDE || AddeSubeNode->getOpcode() == ARMISD::SUBE) && "Expect an ADDE or SUBE") ? void (0) : __assert_fail ("(AddeSubeNode->getOpcode() == ARMISD::ADDE || AddeSubeNode->getOpcode() == ARMISD::SUBE) && \"Expect an ADDE or SUBE\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 12672, __extension__ __PRETTY_FUNCTION__)) | ||||
12672 | "Expect an ADDE or SUBE")(static_cast <bool> ((AddeSubeNode->getOpcode() == ARMISD ::ADDE || AddeSubeNode->getOpcode() == ARMISD::SUBE) && "Expect an ADDE or SUBE") ? void (0) : __assert_fail ("(AddeSubeNode->getOpcode() == ARMISD::ADDE || AddeSubeNode->getOpcode() == ARMISD::SUBE) && \"Expect an ADDE or SUBE\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 12672, __extension__ __PRETTY_FUNCTION__)); | ||||
12673 | |||||
12674 | assert(AddeSubeNode->getNumOperands() == 3 &&(static_cast <bool> (AddeSubeNode->getNumOperands() == 3 && AddeSubeNode->getOperand(2).getValueType() == MVT::i32 && "ADDE node has the wrong inputs") ? void (0) : __assert_fail ("AddeSubeNode->getNumOperands() == 3 && AddeSubeNode->getOperand(2).getValueType() == MVT::i32 && \"ADDE node has the wrong inputs\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 12676, __extension__ __PRETTY_FUNCTION__)) | ||||
12675 | AddeSubeNode->getOperand(2).getValueType() == MVT::i32 &&(static_cast <bool> (AddeSubeNode->getNumOperands() == 3 && AddeSubeNode->getOperand(2).getValueType() == MVT::i32 && "ADDE node has the wrong inputs") ? void (0) : __assert_fail ("AddeSubeNode->getNumOperands() == 3 && AddeSubeNode->getOperand(2).getValueType() == MVT::i32 && \"ADDE node has the wrong inputs\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 12676, __extension__ __PRETTY_FUNCTION__)) | ||||
12676 | "ADDE node has the wrong inputs")(static_cast <bool> (AddeSubeNode->getNumOperands() == 3 && AddeSubeNode->getOperand(2).getValueType() == MVT::i32 && "ADDE node has the wrong inputs") ? void (0) : __assert_fail ("AddeSubeNode->getNumOperands() == 3 && AddeSubeNode->getOperand(2).getValueType() == MVT::i32 && \"ADDE node has the wrong inputs\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 12676, __extension__ __PRETTY_FUNCTION__)); | ||||
12677 | |||||
12678 | // Check that we are chained to the right ADDC or SUBC node. | ||||
12679 | SDNode *AddcSubcNode = AddeSubeNode->getOperand(2).getNode(); | ||||
12680 | if ((AddeSubeNode->getOpcode() == ARMISD::ADDE && | ||||
12681 | AddcSubcNode->getOpcode() != ARMISD::ADDC) || | ||||
12682 | (AddeSubeNode->getOpcode() == ARMISD::SUBE && | ||||
12683 | AddcSubcNode->getOpcode() != ARMISD::SUBC)) | ||||
12684 | return SDValue(); | ||||
12685 | |||||
12686 | SDValue AddcSubcOp0 = AddcSubcNode->getOperand(0); | ||||
12687 | SDValue AddcSubcOp1 = AddcSubcNode->getOperand(1); | ||||
12688 | |||||
12689 | // Check if the two operands are from the same mul_lohi node. | ||||
12690 | if (AddcSubcOp0.getNode() == AddcSubcOp1.getNode()) | ||||
12691 | return SDValue(); | ||||
12692 | |||||
12693 | assert(AddcSubcNode->getNumValues() == 2 &&(static_cast <bool> (AddcSubcNode->getNumValues() == 2 && AddcSubcNode->getValueType(0) == MVT::i32 && "Expect ADDC with two result values. First: i32") ? void (0) : __assert_fail ("AddcSubcNode->getNumValues() == 2 && AddcSubcNode->getValueType(0) == MVT::i32 && \"Expect ADDC with two result values. First: i32\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 12695, __extension__ __PRETTY_FUNCTION__)) | ||||
12694 | AddcSubcNode->getValueType(0) == MVT::i32 &&(static_cast <bool> (AddcSubcNode->getNumValues() == 2 && AddcSubcNode->getValueType(0) == MVT::i32 && "Expect ADDC with two result values. First: i32") ? void (0) : __assert_fail ("AddcSubcNode->getNumValues() == 2 && AddcSubcNode->getValueType(0) == MVT::i32 && \"Expect ADDC with two result values. First: i32\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 12695, __extension__ __PRETTY_FUNCTION__)) | ||||
12695 | "Expect ADDC with two result values. First: i32")(static_cast <bool> (AddcSubcNode->getNumValues() == 2 && AddcSubcNode->getValueType(0) == MVT::i32 && "Expect ADDC with two result values. First: i32") ? void (0) : __assert_fail ("AddcSubcNode->getNumValues() == 2 && AddcSubcNode->getValueType(0) == MVT::i32 && \"Expect ADDC with two result values. First: i32\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 12695, __extension__ __PRETTY_FUNCTION__)); | ||||
12696 | |||||
12697 | // Check that the ADDC adds the low result of the S/UMUL_LOHI. If not, it | ||||
12698 | // maybe a SMLAL which multiplies two 16-bit values. | ||||
12699 | if (AddeSubeNode->getOpcode() == ARMISD::ADDE && | ||||
12700 | AddcSubcOp0->getOpcode() != ISD::UMUL_LOHI && | ||||
12701 | AddcSubcOp0->getOpcode() != ISD::SMUL_LOHI && | ||||
12702 | AddcSubcOp1->getOpcode() != ISD::UMUL_LOHI && | ||||
12703 | AddcSubcOp1->getOpcode() != ISD::SMUL_LOHI) | ||||
12704 | return AddCombineTo64BitSMLAL16(AddcSubcNode, AddeSubeNode, DCI, Subtarget); | ||||
12705 | |||||
12706 | // Check for the triangle shape. | ||||
12707 | SDValue AddeSubeOp0 = AddeSubeNode->getOperand(0); | ||||
12708 | SDValue AddeSubeOp1 = AddeSubeNode->getOperand(1); | ||||
12709 | |||||
12710 | // Make sure that the ADDE/SUBE operands are not coming from the same node. | ||||
12711 | if (AddeSubeOp0.getNode() == AddeSubeOp1.getNode()) | ||||
12712 | return SDValue(); | ||||
12713 | |||||
12714 | // Find the MUL_LOHI node walking up ADDE/SUBE's operands. | ||||
12715 | bool IsLeftOperandMUL = false; | ||||
12716 | SDValue MULOp = findMUL_LOHI(AddeSubeOp0); | ||||
12717 | if (MULOp == SDValue()) | ||||
12718 | MULOp = findMUL_LOHI(AddeSubeOp1); | ||||
12719 | else | ||||
12720 | IsLeftOperandMUL = true; | ||||
12721 | if (MULOp == SDValue()) | ||||
12722 | return SDValue(); | ||||
12723 | |||||
12724 | // Figure out the right opcode. | ||||
12725 | unsigned Opc = MULOp->getOpcode(); | ||||
12726 | unsigned FinalOpc = (Opc == ISD::SMUL_LOHI) ? ARMISD::SMLAL : ARMISD::UMLAL; | ||||
12727 | |||||
12728 | // Figure out the high and low input values to the MLAL node. | ||||
12729 | SDValue *HiAddSub = nullptr; | ||||
12730 | SDValue *LoMul = nullptr; | ||||
12731 | SDValue *LowAddSub = nullptr; | ||||
12732 | |||||
12733 | // Ensure that ADDE/SUBE is from high result of ISD::xMUL_LOHI. | ||||
12734 | if ((AddeSubeOp0 != MULOp.getValue(1)) && (AddeSubeOp1 != MULOp.getValue(1))) | ||||
12735 | return SDValue(); | ||||
12736 | |||||
12737 | if (IsLeftOperandMUL) | ||||
12738 | HiAddSub = &AddeSubeOp1; | ||||
12739 | else | ||||
12740 | HiAddSub = &AddeSubeOp0; | ||||
12741 | |||||
12742 | // Ensure that LoMul and LowAddSub are taken from correct ISD::SMUL_LOHI node | ||||
12743 | // whose low result is fed to the ADDC/SUBC we are checking. | ||||
12744 | |||||
12745 | if (AddcSubcOp0 == MULOp.getValue(0)) { | ||||
12746 | LoMul = &AddcSubcOp0; | ||||
12747 | LowAddSub = &AddcSubcOp1; | ||||
12748 | } | ||||
12749 | if (AddcSubcOp1 == MULOp.getValue(0)) { | ||||
12750 | LoMul = &AddcSubcOp1; | ||||
12751 | LowAddSub = &AddcSubcOp0; | ||||
12752 | } | ||||
12753 | |||||
12754 | if (!LoMul) | ||||
12755 | return SDValue(); | ||||
12756 | |||||
12757 | // If HiAddSub is the same node as ADDC/SUBC or is a predecessor of ADDC/SUBC | ||||
12758 | // the replacement below will create a cycle. | ||||
12759 | if (AddcSubcNode == HiAddSub->getNode() || | ||||
12760 | AddcSubcNode->isPredecessorOf(HiAddSub->getNode())) | ||||
12761 | return SDValue(); | ||||
12762 | |||||
12763 | // Create the merged node. | ||||
12764 | SelectionDAG &DAG = DCI.DAG; | ||||
12765 | |||||
12766 | // Start building operand list. | ||||
12767 | SmallVector<SDValue, 8> Ops; | ||||
12768 | Ops.push_back(LoMul->getOperand(0)); | ||||
12769 | Ops.push_back(LoMul->getOperand(1)); | ||||
12770 | |||||
12771 | // Check whether we can use SMMLAR, SMMLSR or SMMULR instead. For this to be | ||||
12772 | // the case, we must be doing signed multiplication and only use the higher | ||||
12773 | // part of the result of the MLAL, furthermore the LowAddSub must be a constant | ||||
12774 | // addition or subtraction with the value of 0x800000. | ||||
12775 | if (Subtarget->hasV6Ops() && Subtarget->hasDSP() && Subtarget->useMulOps() && | ||||
12776 | FinalOpc == ARMISD::SMLAL && !AddeSubeNode->hasAnyUseOfValue(1) && | ||||
12777 | LowAddSub->getNode()->getOpcode() == ISD::Constant && | ||||
12778 | static_cast<ConstantSDNode *>(LowAddSub->getNode())->getZExtValue() == | ||||
12779 | 0x80000000) { | ||||
12780 | Ops.push_back(*HiAddSub); | ||||
12781 | if (AddcSubcNode->getOpcode() == ARMISD::SUBC) { | ||||
12782 | FinalOpc = ARMISD::SMMLSR; | ||||
12783 | } else { | ||||
12784 | FinalOpc = ARMISD::SMMLAR; | ||||
12785 | } | ||||
12786 | SDValue NewNode = DAG.getNode(FinalOpc, SDLoc(AddcSubcNode), MVT::i32, Ops); | ||||
12787 | DAG.ReplaceAllUsesOfValueWith(SDValue(AddeSubeNode, 0), NewNode); | ||||
12788 | |||||
12789 | return SDValue(AddeSubeNode, 0); | ||||
12790 | } else if (AddcSubcNode->getOpcode() == ARMISD::SUBC) | ||||
12791 | // SMMLS is generated during instruction selection and the rest of this | ||||
12792 | // function can not handle the case where AddcSubcNode is a SUBC. | ||||
12793 | return SDValue(); | ||||
12794 | |||||
12795 | // Finish building the operand list for {U/S}MLAL | ||||
12796 | Ops.push_back(*LowAddSub); | ||||
12797 | Ops.push_back(*HiAddSub); | ||||
12798 | |||||
12799 | SDValue MLALNode = DAG.getNode(FinalOpc, SDLoc(AddcSubcNode), | ||||
12800 | DAG.getVTList(MVT::i32, MVT::i32), Ops); | ||||
12801 | |||||
12802 | // Replace the ADDs' nodes uses by the MLA node's values. | ||||
12803 | SDValue HiMLALResult(MLALNode.getNode(), 1); | ||||
12804 | DAG.ReplaceAllUsesOfValueWith(SDValue(AddeSubeNode, 0), HiMLALResult); | ||||
12805 | |||||
12806 | SDValue LoMLALResult(MLALNode.getNode(), 0); | ||||
12807 | DAG.ReplaceAllUsesOfValueWith(SDValue(AddcSubcNode, 0), LoMLALResult); | ||||
12808 | |||||
12809 | // Return original node to notify the driver to stop replacing. | ||||
12810 | return SDValue(AddeSubeNode, 0); | ||||
12811 | } | ||||
12812 | |||||
12813 | static SDValue AddCombineTo64bitUMAAL(SDNode *AddeNode, | ||||
12814 | TargetLowering::DAGCombinerInfo &DCI, | ||||
12815 | const ARMSubtarget *Subtarget) { | ||||
12816 | // UMAAL is similar to UMLAL except that it adds two unsigned values. | ||||
12817 | // While trying to combine for the other MLAL nodes, first search for the | ||||
12818 | // chance to use UMAAL. Check if Addc uses a node which has already | ||||
12819 | // been combined into a UMLAL. The other pattern is UMLAL using Addc/Adde | ||||
12820 | // as the addend, and it's handled in PerformUMLALCombine. | ||||
12821 | |||||
12822 | if (!Subtarget->hasV6Ops() || !Subtarget->hasDSP()) | ||||
12823 | return AddCombineTo64bitMLAL(AddeNode, DCI, Subtarget); | ||||
12824 | |||||
12825 | // Check that we have a glued ADDC node. | ||||
12826 | SDNode* AddcNode = AddeNode->getOperand(2).getNode(); | ||||
12827 | if (AddcNode->getOpcode() != ARMISD::ADDC) | ||||
12828 | return SDValue(); | ||||
12829 | |||||
12830 | // Find the converted UMAAL or quit if it doesn't exist. | ||||
12831 | SDNode *UmlalNode = nullptr; | ||||
12832 | SDValue AddHi; | ||||
12833 | if (AddcNode->getOperand(0).getOpcode() == ARMISD::UMLAL) { | ||||
12834 | UmlalNode = AddcNode->getOperand(0).getNode(); | ||||
12835 | AddHi = AddcNode->getOperand(1); | ||||
12836 | } else if (AddcNode->getOperand(1).getOpcode() == ARMISD::UMLAL) { | ||||
12837 | UmlalNode = AddcNode->getOperand(1).getNode(); | ||||
12838 | AddHi = AddcNode->getOperand(0); | ||||
12839 | } else { | ||||
12840 | return AddCombineTo64bitMLAL(AddeNode, DCI, Subtarget); | ||||
12841 | } | ||||
12842 | |||||
12843 | // The ADDC should be glued to an ADDE node, which uses the same UMLAL as | ||||
12844 | // the ADDC as well as Zero. | ||||
12845 | if (!isNullConstant(UmlalNode->getOperand(3))) | ||||
12846 | return SDValue(); | ||||
12847 | |||||
12848 | if ((isNullConstant(AddeNode->getOperand(0)) && | ||||
12849 | AddeNode->getOperand(1).getNode() == UmlalNode) || | ||||
12850 | (AddeNode->getOperand(0).getNode() == UmlalNode && | ||||
12851 | isNullConstant(AddeNode->getOperand(1)))) { | ||||
12852 | SelectionDAG &DAG = DCI.DAG; | ||||
12853 | SDValue Ops[] = { UmlalNode->getOperand(0), UmlalNode->getOperand(1), | ||||
12854 | UmlalNode->getOperand(2), AddHi }; | ||||
12855 | SDValue UMAAL = DAG.getNode(ARMISD::UMAAL, SDLoc(AddcNode), | ||||
12856 | DAG.getVTList(MVT::i32, MVT::i32), Ops); | ||||
12857 | |||||
12858 | // Replace the ADDs' nodes uses by the UMAAL node's values. | ||||
12859 | DAG.ReplaceAllUsesOfValueWith(SDValue(AddeNode, 0), SDValue(UMAAL.getNode(), 1)); | ||||
12860 | DAG.ReplaceAllUsesOfValueWith(SDValue(AddcNode, 0), SDValue(UMAAL.getNode(), 0)); | ||||
12861 | |||||
12862 | // Return original node to notify the driver to stop replacing. | ||||
12863 | return SDValue(AddeNode, 0); | ||||
12864 | } | ||||
12865 | return SDValue(); | ||||
12866 | } | ||||
12867 | |||||
12868 | static SDValue PerformUMLALCombine(SDNode *N, SelectionDAG &DAG, | ||||
12869 | const ARMSubtarget *Subtarget) { | ||||
12870 | if (!Subtarget->hasV6Ops() || !Subtarget->hasDSP()) | ||||
12871 | return SDValue(); | ||||
12872 | |||||
12873 | // Check that we have a pair of ADDC and ADDE as operands. | ||||
12874 | // Both addends of the ADDE must be zero. | ||||
12875 | SDNode* AddcNode = N->getOperand(2).getNode(); | ||||
12876 | SDNode* AddeNode = N->getOperand(3).getNode(); | ||||
12877 | if ((AddcNode->getOpcode() == ARMISD::ADDC) && | ||||
12878 | (AddeNode->getOpcode() == ARMISD::ADDE) && | ||||
12879 | isNullConstant(AddeNode->getOperand(0)) && | ||||
12880 | isNullConstant(AddeNode->getOperand(1)) && | ||||
12881 | (AddeNode->getOperand(2).getNode() == AddcNode)) | ||||
12882 | return DAG.getNode(ARMISD::UMAAL, SDLoc(N), | ||||
12883 | DAG.getVTList(MVT::i32, MVT::i32), | ||||
12884 | {N->getOperand(0), N->getOperand(1), | ||||
12885 | AddcNode->getOperand(0), AddcNode->getOperand(1)}); | ||||
12886 | else | ||||
12887 | return SDValue(); | ||||
12888 | } | ||||
12889 | |||||
12890 | static SDValue PerformAddcSubcCombine(SDNode *N, | ||||
12891 | TargetLowering::DAGCombinerInfo &DCI, | ||||
12892 | const ARMSubtarget *Subtarget) { | ||||
12893 | SelectionDAG &DAG(DCI.DAG); | ||||
12894 | |||||
12895 | if (N->getOpcode() == ARMISD::SUBC && N->hasAnyUseOfValue(1)) { | ||||
12896 | // (SUBC (ADDE 0, 0, C), 1) -> C | ||||
12897 | SDValue LHS = N->getOperand(0); | ||||
12898 | SDValue RHS = N->getOperand(1); | ||||
12899 | if (LHS->getOpcode() == ARMISD::ADDE && | ||||
12900 | isNullConstant(LHS->getOperand(0)) && | ||||
12901 | isNullConstant(LHS->getOperand(1)) && isOneConstant(RHS)) { | ||||
12902 | return DCI.CombineTo(N, SDValue(N, 0), LHS->getOperand(2)); | ||||
12903 | } | ||||
12904 | } | ||||
12905 | |||||
12906 | if (Subtarget->isThumb1Only()) { | ||||
12907 | SDValue RHS = N->getOperand(1); | ||||
12908 | if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(RHS)) { | ||||
12909 | int32_t imm = C->getSExtValue(); | ||||
12910 | if (imm < 0 && imm > std::numeric_limits<int>::min()) { | ||||
12911 | SDLoc DL(N); | ||||
12912 | RHS = DAG.getConstant(-imm, DL, MVT::i32); | ||||
12913 | unsigned Opcode = (N->getOpcode() == ARMISD::ADDC) ? ARMISD::SUBC | ||||
12914 | : ARMISD::ADDC; | ||||
12915 | return DAG.getNode(Opcode, DL, N->getVTList(), N->getOperand(0), RHS); | ||||
12916 | } | ||||
12917 | } | ||||
12918 | } | ||||
12919 | |||||
12920 | return SDValue(); | ||||
12921 | } | ||||
12922 | |||||
12923 | static SDValue PerformAddeSubeCombine(SDNode *N, | ||||
12924 | TargetLowering::DAGCombinerInfo &DCI, | ||||
12925 | const ARMSubtarget *Subtarget) { | ||||
12926 | if (Subtarget->isThumb1Only()) { | ||||
12927 | SelectionDAG &DAG = DCI.DAG; | ||||
12928 | SDValue RHS = N->getOperand(1); | ||||
12929 | if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(RHS)) { | ||||
12930 | int64_t imm = C->getSExtValue(); | ||||
12931 | if (imm < 0) { | ||||
12932 | SDLoc DL(N); | ||||
12933 | |||||
12934 | // The with-carry-in form matches bitwise not instead of the negation. | ||||
12935 | // Effectively, the inverse interpretation of the carry flag already | ||||
12936 | // accounts for part of the negation. | ||||
12937 | RHS = DAG.getConstant(~imm, DL, MVT::i32); | ||||
12938 | |||||
12939 | unsigned Opcode = (N->getOpcode() == ARMISD::ADDE) ? ARMISD::SUBE | ||||
12940 | : ARMISD::ADDE; | ||||
12941 | return DAG.getNode(Opcode, DL, N->getVTList(), | ||||
12942 | N->getOperand(0), RHS, N->getOperand(2)); | ||||
12943 | } | ||||
12944 | } | ||||
12945 | } else if (N->getOperand(1)->getOpcode() == ISD::SMUL_LOHI) { | ||||
12946 | return AddCombineTo64bitMLAL(N, DCI, Subtarget); | ||||
12947 | } | ||||
12948 | return SDValue(); | ||||
12949 | } | ||||
12950 | |||||
12951 | static SDValue PerformSELECTCombine(SDNode *N, | ||||
12952 | TargetLowering::DAGCombinerInfo &DCI, | ||||
12953 | const ARMSubtarget *Subtarget) { | ||||
12954 | if (!Subtarget->hasMVEIntegerOps()) | ||||
12955 | return SDValue(); | ||||
12956 | |||||
12957 | SDLoc dl(N); | ||||
12958 | SDValue SetCC; | ||||
12959 | SDValue LHS; | ||||
12960 | SDValue RHS; | ||||
12961 | ISD::CondCode CC; | ||||
12962 | SDValue TrueVal; | ||||
12963 | SDValue FalseVal; | ||||
12964 | |||||
12965 | if (N->getOpcode() == ISD::SELECT && | ||||
12966 | N->getOperand(0)->getOpcode() == ISD::SETCC) { | ||||
12967 | SetCC = N->getOperand(0); | ||||
12968 | LHS = SetCC->getOperand(0); | ||||
12969 | RHS = SetCC->getOperand(1); | ||||
12970 | CC = cast<CondCodeSDNode>(SetCC->getOperand(2))->get(); | ||||
12971 | TrueVal = N->getOperand(1); | ||||
12972 | FalseVal = N->getOperand(2); | ||||
12973 | } else if (N->getOpcode() == ISD::SELECT_CC) { | ||||
12974 | LHS = N->getOperand(0); | ||||
12975 | RHS = N->getOperand(1); | ||||
12976 | CC = cast<CondCodeSDNode>(N->getOperand(4))->get(); | ||||
12977 | TrueVal = N->getOperand(2); | ||||
12978 | FalseVal = N->getOperand(3); | ||||
12979 | } else { | ||||
12980 | return SDValue(); | ||||
12981 | } | ||||
12982 | |||||
12983 | unsigned int Opcode = 0; | ||||
12984 | if ((TrueVal->getOpcode() == ISD::VECREDUCE_UMIN || | ||||
12985 | FalseVal->getOpcode() == ISD::VECREDUCE_UMIN) && | ||||
12986 | (CC == ISD::SETULT || CC == ISD::SETUGT)) { | ||||
12987 | Opcode = ARMISD::VMINVu; | ||||
12988 | if (CC == ISD::SETUGT) | ||||
12989 | std::swap(TrueVal, FalseVal); | ||||
12990 | } else if ((TrueVal->getOpcode() == ISD::VECREDUCE_SMIN || | ||||
12991 | FalseVal->getOpcode() == ISD::VECREDUCE_SMIN) && | ||||
12992 | (CC == ISD::SETLT || CC == ISD::SETGT)) { | ||||
12993 | Opcode = ARMISD::VMINVs; | ||||
12994 | if (CC == ISD::SETGT) | ||||
12995 | std::swap(TrueVal, FalseVal); | ||||
12996 | } else if ((TrueVal->getOpcode() == ISD::VECREDUCE_UMAX || | ||||
12997 | FalseVal->getOpcode() == ISD::VECREDUCE_UMAX) && | ||||
12998 | (CC == ISD::SETUGT || CC == ISD::SETULT)) { | ||||
12999 | Opcode = ARMISD::VMAXVu; | ||||
13000 | if (CC == ISD::SETULT) | ||||
13001 | std::swap(TrueVal, FalseVal); | ||||
13002 | } else if ((TrueVal->getOpcode() == ISD::VECREDUCE_SMAX || | ||||
13003 | FalseVal->getOpcode() == ISD::VECREDUCE_SMAX) && | ||||
13004 | (CC == ISD::SETGT || CC == ISD::SETLT)) { | ||||
13005 | Opcode = ARMISD::VMAXVs; | ||||
13006 | if (CC == ISD::SETLT) | ||||
13007 | std::swap(TrueVal, FalseVal); | ||||
13008 | } else | ||||
13009 | return SDValue(); | ||||
13010 | |||||
13011 | // Normalise to the right hand side being the vector reduction | ||||
13012 | switch (TrueVal->getOpcode()) { | ||||
13013 | case ISD::VECREDUCE_UMIN: | ||||
13014 | case ISD::VECREDUCE_SMIN: | ||||
13015 | case ISD::VECREDUCE_UMAX: | ||||
13016 | case ISD::VECREDUCE_SMAX: | ||||
13017 | std::swap(LHS, RHS); | ||||
13018 | std::swap(TrueVal, FalseVal); | ||||
13019 | break; | ||||
13020 | } | ||||
13021 | |||||
13022 | EVT VectorType = FalseVal->getOperand(0).getValueType(); | ||||
13023 | |||||
13024 | if (VectorType != MVT::v16i8 && VectorType != MVT::v8i16 && | ||||
13025 | VectorType != MVT::v4i32) | ||||
13026 | return SDValue(); | ||||
13027 | |||||
13028 | EVT VectorScalarType = VectorType.getVectorElementType(); | ||||
13029 | |||||
13030 | // The values being selected must also be the ones being compared | ||||
13031 | if (TrueVal != LHS || FalseVal != RHS) | ||||
13032 | return SDValue(); | ||||
13033 | |||||
13034 | EVT LeftType = LHS->getValueType(0); | ||||
13035 | EVT RightType = RHS->getValueType(0); | ||||
13036 | |||||
13037 | // The types must match the reduced type too | ||||
13038 | if (LeftType != VectorScalarType || RightType != VectorScalarType) | ||||
13039 | return SDValue(); | ||||
13040 | |||||
13041 | // Legalise the scalar to an i32 | ||||
13042 | if (VectorScalarType != MVT::i32) | ||||
13043 | LHS = DCI.DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, LHS); | ||||
13044 | |||||
13045 | // Generate the reduction as an i32 for legalisation purposes | ||||
13046 | auto Reduction = | ||||
13047 | DCI.DAG.getNode(Opcode, dl, MVT::i32, LHS, RHS->getOperand(0)); | ||||
13048 | |||||
13049 | // The result isn't actually an i32 so truncate it back to its original type | ||||
13050 | if (VectorScalarType != MVT::i32) | ||||
13051 | Reduction = DCI.DAG.getNode(ISD::TRUNCATE, dl, VectorScalarType, Reduction); | ||||
13052 | |||||
13053 | return Reduction; | ||||
13054 | } | ||||
13055 | |||||
13056 | // A special combine for the vqdmulh family of instructions. This is one of the | ||||
13057 | // potential set of patterns that could patch this instruction. The base pattern | ||||
13058 | // you would expect to be min(max(ashr(mul(mul(sext(x), 2), sext(y)), 16))). | ||||
13059 | // This matches the different min(max(ashr(mul(mul(sext(x), sext(y)), 2), 16))), | ||||
13060 | // which llvm will have optimized to min(ashr(mul(sext(x), sext(y)), 15))) as | ||||
13061 | // the max is unnecessary. | ||||
13062 | static SDValue PerformVQDMULHCombine(SDNode *N, SelectionDAG &DAG) { | ||||
13063 | EVT VT = N->getValueType(0); | ||||
13064 | SDValue Shft; | ||||
13065 | ConstantSDNode *Clamp; | ||||
13066 | |||||
13067 | if (!VT.isVector() || VT.getScalarSizeInBits() > 64) | ||||
13068 | return SDValue(); | ||||
13069 | |||||
13070 | if (N->getOpcode() == ISD::SMIN) { | ||||
13071 | Shft = N->getOperand(0); | ||||
13072 | Clamp = isConstOrConstSplat(N->getOperand(1)); | ||||
13073 | } else if (N->getOpcode() == ISD::VSELECT) { | ||||
13074 | // Detect a SMIN, which for an i64 node will be a vselect/setcc, not a smin. | ||||
13075 | SDValue Cmp = N->getOperand(0); | ||||
13076 | if (Cmp.getOpcode() != ISD::SETCC || | ||||
13077 | cast<CondCodeSDNode>(Cmp.getOperand(2))->get() != ISD::SETLT || | ||||
13078 | Cmp.getOperand(0) != N->getOperand(1) || | ||||
13079 | Cmp.getOperand(1) != N->getOperand(2)) | ||||
13080 | return SDValue(); | ||||
13081 | Shft = N->getOperand(1); | ||||
13082 | Clamp = isConstOrConstSplat(N->getOperand(2)); | ||||
13083 | } else | ||||
13084 | return SDValue(); | ||||
13085 | |||||
13086 | if (!Clamp) | ||||
13087 | return SDValue(); | ||||
13088 | |||||
13089 | MVT ScalarType; | ||||
13090 | int ShftAmt = 0; | ||||
13091 | switch (Clamp->getSExtValue()) { | ||||
13092 | case (1 << 7) - 1: | ||||
13093 | ScalarType = MVT::i8; | ||||
13094 | ShftAmt = 7; | ||||
13095 | break; | ||||
13096 | case (1 << 15) - 1: | ||||
13097 | ScalarType = MVT::i16; | ||||
13098 | ShftAmt = 15; | ||||
13099 | break; | ||||
13100 | case (1ULL << 31) - 1: | ||||
13101 | ScalarType = MVT::i32; | ||||
13102 | ShftAmt = 31; | ||||
13103 | break; | ||||
13104 | default: | ||||
13105 | return SDValue(); | ||||
13106 | } | ||||
13107 | |||||
13108 | if (Shft.getOpcode() != ISD::SRA) | ||||
13109 | return SDValue(); | ||||
13110 | ConstantSDNode *N1 = isConstOrConstSplat(Shft.getOperand(1)); | ||||
13111 | if (!N1 || N1->getSExtValue() != ShftAmt) | ||||
13112 | return SDValue(); | ||||
13113 | |||||
13114 | SDValue Mul = Shft.getOperand(0); | ||||
13115 | if (Mul.getOpcode() != ISD::MUL) | ||||
13116 | return SDValue(); | ||||
13117 | |||||
13118 | SDValue Ext0 = Mul.getOperand(0); | ||||
13119 | SDValue Ext1 = Mul.getOperand(1); | ||||
13120 | if (Ext0.getOpcode() != ISD::SIGN_EXTEND || | ||||
13121 | Ext1.getOpcode() != ISD::SIGN_EXTEND) | ||||
13122 | return SDValue(); | ||||
13123 | EVT VecVT = Ext0.getOperand(0).getValueType(); | ||||
13124 | if (!VecVT.isPow2VectorType() || VecVT.getVectorNumElements() == 1) | ||||
13125 | return SDValue(); | ||||
13126 | if (Ext1.getOperand(0).getValueType() != VecVT || | ||||
13127 | VecVT.getScalarType() != ScalarType || | ||||
13128 | VT.getScalarSizeInBits() < ScalarType.getScalarSizeInBits() * 2) | ||||
13129 | return SDValue(); | ||||
13130 | |||||
13131 | SDLoc DL(Mul); | ||||
13132 | unsigned LegalLanes = 128 / (ShftAmt + 1); | ||||
13133 | EVT LegalVecVT = MVT::getVectorVT(ScalarType, LegalLanes); | ||||
13134 | // For types smaller than legal vectors extend to be legal and only use needed | ||||
13135 | // lanes. | ||||
13136 | if (VecVT.getSizeInBits() < 128) { | ||||
13137 | EVT ExtVecVT = | ||||
13138 | MVT::getVectorVT(MVT::getIntegerVT(128 / VecVT.getVectorNumElements()), | ||||
13139 | VecVT.getVectorNumElements()); | ||||
13140 | SDValue Inp0 = | ||||
13141 | DAG.getNode(ISD::ANY_EXTEND, DL, ExtVecVT, Ext0.getOperand(0)); | ||||
13142 | SDValue Inp1 = | ||||
13143 | DAG.getNode(ISD::ANY_EXTEND, DL, ExtVecVT, Ext1.getOperand(0)); | ||||
13144 | Inp0 = DAG.getNode(ARMISD::VECTOR_REG_CAST, DL, LegalVecVT, Inp0); | ||||
13145 | Inp1 = DAG.getNode(ARMISD::VECTOR_REG_CAST, DL, LegalVecVT, Inp1); | ||||
13146 | SDValue VQDMULH = DAG.getNode(ARMISD::VQDMULH, DL, LegalVecVT, Inp0, Inp1); | ||||
13147 | SDValue Trunc = DAG.getNode(ARMISD::VECTOR_REG_CAST, DL, ExtVecVT, VQDMULH); | ||||
13148 | Trunc = DAG.getNode(ISD::TRUNCATE, DL, VecVT, Trunc); | ||||
13149 | return DAG.getNode(ISD::SIGN_EXTEND, DL, VT, Trunc); | ||||
13150 | } | ||||
13151 | |||||
13152 | // For larger types, split into legal sized chunks. | ||||
13153 | assert(VecVT.getSizeInBits() % 128 == 0 && "Expected a power2 type")(static_cast <bool> (VecVT.getSizeInBits() % 128 == 0 && "Expected a power2 type") ? void (0) : __assert_fail ("VecVT.getSizeInBits() % 128 == 0 && \"Expected a power2 type\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 13153, __extension__ __PRETTY_FUNCTION__)); | ||||
13154 | unsigned NumParts = VecVT.getSizeInBits() / 128; | ||||
13155 | SmallVector<SDValue> Parts; | ||||
13156 | for (unsigned I = 0; I < NumParts; ++I) { | ||||
13157 | SDValue Inp0 = | ||||
13158 | DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, LegalVecVT, Ext0.getOperand(0), | ||||
13159 | DAG.getVectorIdxConstant(I * LegalLanes, DL)); | ||||
13160 | SDValue Inp1 = | ||||
13161 | DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, LegalVecVT, Ext1.getOperand(0), | ||||
13162 | DAG.getVectorIdxConstant(I * LegalLanes, DL)); | ||||
13163 | SDValue VQDMULH = DAG.getNode(ARMISD::VQDMULH, DL, LegalVecVT, Inp0, Inp1); | ||||
13164 | Parts.push_back(VQDMULH); | ||||
13165 | } | ||||
13166 | return DAG.getNode(ISD::SIGN_EXTEND, DL, VT, | ||||
13167 | DAG.getNode(ISD::CONCAT_VECTORS, DL, VecVT, Parts)); | ||||
13168 | } | ||||
13169 | |||||
13170 | static SDValue PerformVSELECTCombine(SDNode *N, | ||||
13171 | TargetLowering::DAGCombinerInfo &DCI, | ||||
13172 | const ARMSubtarget *Subtarget) { | ||||
13173 | if (!Subtarget->hasMVEIntegerOps()) | ||||
13174 | return SDValue(); | ||||
13175 | |||||
13176 | if (SDValue V = PerformVQDMULHCombine(N, DCI.DAG)) | ||||
13177 | return V; | ||||
13178 | |||||
13179 | // Transforms vselect(not(cond), lhs, rhs) into vselect(cond, rhs, lhs). | ||||
13180 | // | ||||
13181 | // We need to re-implement this optimization here as the implementation in the | ||||
13182 | // Target-Independent DAGCombiner does not handle the kind of constant we make | ||||
13183 | // (it calls isConstOrConstSplat with AllowTruncation set to false - and for | ||||
13184 | // good reason, allowing truncation there would break other targets). | ||||
13185 | // | ||||
13186 | // Currently, this is only done for MVE, as it's the only target that benefits | ||||
13187 | // from this transformation (e.g. VPNOT+VPSEL becomes a single VPSEL). | ||||
13188 | if (N->getOperand(0).getOpcode() != ISD::XOR) | ||||
13189 | return SDValue(); | ||||
13190 | SDValue XOR = N->getOperand(0); | ||||
13191 | |||||
13192 | // Check if the XOR's RHS is either a 1, or a BUILD_VECTOR of 1s. | ||||
13193 | // It is important to check with truncation allowed as the BUILD_VECTORs we | ||||
13194 | // generate in those situations will truncate their operands. | ||||
13195 | ConstantSDNode *Const = | ||||
13196 | isConstOrConstSplat(XOR->getOperand(1), /*AllowUndefs*/ false, | ||||
13197 | /*AllowTruncation*/ true); | ||||
13198 | if (!Const || !Const->isOne()) | ||||
13199 | return SDValue(); | ||||
13200 | |||||
13201 | // Rewrite into vselect(cond, rhs, lhs). | ||||
13202 | SDValue Cond = XOR->getOperand(0); | ||||
13203 | SDValue LHS = N->getOperand(1); | ||||
13204 | SDValue RHS = N->getOperand(2); | ||||
13205 | EVT Type = N->getValueType(0); | ||||
13206 | return DCI.DAG.getNode(ISD::VSELECT, SDLoc(N), Type, Cond, RHS, LHS); | ||||
13207 | } | ||||
13208 | |||||
13209 | // Convert vsetcc([0,1,2,..], splat(n), ult) -> vctp n | ||||
13210 | static SDValue PerformVSetCCToVCTPCombine(SDNode *N, | ||||
13211 | TargetLowering::DAGCombinerInfo &DCI, | ||||
13212 | const ARMSubtarget *Subtarget) { | ||||
13213 | SDValue Op0 = N->getOperand(0); | ||||
13214 | SDValue Op1 = N->getOperand(1); | ||||
13215 | ISD::CondCode CC = cast<CondCodeSDNode>(N->getOperand(2))->get(); | ||||
13216 | EVT VT = N->getValueType(0); | ||||
13217 | |||||
13218 | if (!Subtarget->hasMVEIntegerOps() || | ||||
13219 | !DCI.DAG.getTargetLoweringInfo().isTypeLegal(VT)) | ||||
13220 | return SDValue(); | ||||
13221 | |||||
13222 | if (CC == ISD::SETUGE) { | ||||
13223 | std::swap(Op0, Op1); | ||||
13224 | CC = ISD::SETULT; | ||||
13225 | } | ||||
13226 | |||||
13227 | if (CC != ISD::SETULT || VT.getScalarSizeInBits() != 1 || | ||||
13228 | Op0.getOpcode() != ISD::BUILD_VECTOR) | ||||
13229 | return SDValue(); | ||||
13230 | |||||
13231 | // Check first operand is BuildVector of 0,1,2,... | ||||
13232 | for (unsigned I = 0; I < VT.getVectorNumElements(); I++) { | ||||
13233 | if (!Op0.getOperand(I).isUndef() && | ||||
13234 | !(isa<ConstantSDNode>(Op0.getOperand(I)) && | ||||
13235 | Op0.getConstantOperandVal(I) == I)) | ||||
13236 | return SDValue(); | ||||
13237 | } | ||||
13238 | |||||
13239 | // The second is a Splat of Op1S | ||||
13240 | SDValue Op1S = DCI.DAG.getSplatValue(Op1); | ||||
13241 | if (!Op1S) | ||||
13242 | return SDValue(); | ||||
13243 | |||||
13244 | unsigned Opc; | ||||
13245 | switch (VT.getVectorNumElements()) { | ||||
13246 | case 2: | ||||
13247 | Opc = Intrinsic::arm_mve_vctp64; | ||||
13248 | break; | ||||
13249 | case 4: | ||||
13250 | Opc = Intrinsic::arm_mve_vctp32; | ||||
13251 | break; | ||||
13252 | case 8: | ||||
13253 | Opc = Intrinsic::arm_mve_vctp16; | ||||
13254 | break; | ||||
13255 | case 16: | ||||
13256 | Opc = Intrinsic::arm_mve_vctp8; | ||||
13257 | break; | ||||
13258 | default: | ||||
13259 | return SDValue(); | ||||
13260 | } | ||||
13261 | |||||
13262 | SDLoc DL(N); | ||||
13263 | return DCI.DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT, | ||||
13264 | DCI.DAG.getConstant(Opc, DL, MVT::i32), | ||||
13265 | DCI.DAG.getZExtOrTrunc(Op1S, DL, MVT::i32)); | ||||
13266 | } | ||||
13267 | |||||
13268 | static SDValue PerformABSCombine(SDNode *N, | ||||
13269 | TargetLowering::DAGCombinerInfo &DCI, | ||||
13270 | const ARMSubtarget *Subtarget) { | ||||
13271 | SelectionDAG &DAG = DCI.DAG; | ||||
13272 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | ||||
13273 | |||||
13274 | if (TLI.isOperationLegal(N->getOpcode(), N->getValueType(0))) | ||||
13275 | return SDValue(); | ||||
13276 | |||||
13277 | return TLI.expandABS(N, DAG); | ||||
13278 | } | ||||
13279 | |||||
13280 | /// PerformADDECombine - Target-specific dag combine transform from | ||||
13281 | /// ARMISD::ADDC, ARMISD::ADDE, and ISD::MUL_LOHI to MLAL or | ||||
13282 | /// ARMISD::ADDC, ARMISD::ADDE and ARMISD::UMLAL to ARMISD::UMAAL | ||||
13283 | static SDValue PerformADDECombine(SDNode *N, | ||||
13284 | TargetLowering::DAGCombinerInfo &DCI, | ||||
13285 | const ARMSubtarget *Subtarget) { | ||||
13286 | // Only ARM and Thumb2 support UMLAL/SMLAL. | ||||
13287 | if (Subtarget->isThumb1Only()) | ||||
13288 | return PerformAddeSubeCombine(N, DCI, Subtarget); | ||||
13289 | |||||
13290 | // Only perform the checks after legalize when the pattern is available. | ||||
13291 | if (DCI.isBeforeLegalize()) return SDValue(); | ||||
13292 | |||||
13293 | return AddCombineTo64bitUMAAL(N, DCI, Subtarget); | ||||
13294 | } | ||||
13295 | |||||
13296 | /// PerformADDCombineWithOperands - Try DAG combinations for an ADD with | ||||
13297 | /// operands N0 and N1. This is a helper for PerformADDCombine that is | ||||
13298 | /// called with the default operands, and if that fails, with commuted | ||||
13299 | /// operands. | ||||
13300 | static SDValue PerformADDCombineWithOperands(SDNode *N, SDValue N0, SDValue N1, | ||||
13301 | TargetLowering::DAGCombinerInfo &DCI, | ||||
13302 | const ARMSubtarget *Subtarget){ | ||||
13303 | // Attempt to create vpadd for this add. | ||||
13304 | if (SDValue Result = AddCombineToVPADD(N, N0, N1, DCI, Subtarget)) | ||||
13305 | return Result; | ||||
13306 | |||||
13307 | // Attempt to create vpaddl for this add. | ||||
13308 | if (SDValue Result = AddCombineVUZPToVPADDL(N, N0, N1, DCI, Subtarget)) | ||||
13309 | return Result; | ||||
13310 | if (SDValue Result = AddCombineBUILD_VECTORToVPADDL(N, N0, N1, DCI, | ||||
13311 | Subtarget)) | ||||
13312 | return Result; | ||||
13313 | |||||
13314 | // fold (add (select cc, 0, c), x) -> (select cc, x, (add, x, c)) | ||||
13315 | if (N0.getNode()->hasOneUse()) | ||||
13316 | if (SDValue Result = combineSelectAndUse(N, N0, N1, DCI)) | ||||
13317 | return Result; | ||||
13318 | return SDValue(); | ||||
13319 | } | ||||
13320 | |||||
13321 | static SDValue TryDistrubutionADDVecReduce(SDNode *N, SelectionDAG &DAG) { | ||||
13322 | EVT VT = N->getValueType(0); | ||||
13323 | SDValue N0 = N->getOperand(0); | ||||
13324 | SDValue N1 = N->getOperand(1); | ||||
13325 | SDLoc dl(N); | ||||
13326 | |||||
13327 | auto IsVecReduce = [](SDValue Op) { | ||||
13328 | switch (Op.getOpcode()) { | ||||
13329 | case ISD::VECREDUCE_ADD: | ||||
13330 | case ARMISD::VADDVs: | ||||
13331 | case ARMISD::VADDVu: | ||||
13332 | case ARMISD::VMLAVs: | ||||
13333 | case ARMISD::VMLAVu: | ||||
13334 | return true; | ||||
13335 | } | ||||
13336 | return false; | ||||
13337 | }; | ||||
13338 | |||||
13339 | auto DistrubuteAddAddVecReduce = [&](SDValue N0, SDValue N1) { | ||||
13340 | // Distribute add(X, add(vecreduce(Y), vecreduce(Z))) -> | ||||
13341 | // add(add(X, vecreduce(Y)), vecreduce(Z)) | ||||
13342 | // to make better use of vaddva style instructions. | ||||
13343 | if (VT == MVT::i32 && N1.getOpcode() == ISD::ADD && !IsVecReduce(N0) && | ||||
13344 | IsVecReduce(N1.getOperand(0)) && IsVecReduce(N1.getOperand(1)) && | ||||
13345 | !isa<ConstantSDNode>(N0)) { | ||||
13346 | SDValue Add0 = DAG.getNode(ISD::ADD, dl, VT, N0, N1.getOperand(0)); | ||||
13347 | return DAG.getNode(ISD::ADD, dl, VT, Add0, N1.getOperand(1)); | ||||
13348 | } | ||||
13349 | // And turn add(add(A, reduce(B)), add(C, reduce(D))) -> | ||||
13350 | // add(add(add(A, C), reduce(B)), reduce(D)) | ||||
13351 | if (VT == MVT::i32 && N0.getOpcode() == ISD::ADD && | ||||
13352 | N1.getOpcode() == ISD::ADD) { | ||||
13353 | unsigned N0RedOp = 0; | ||||
13354 | if (!IsVecReduce(N0.getOperand(N0RedOp))) { | ||||
13355 | N0RedOp = 1; | ||||
13356 | if (!IsVecReduce(N0.getOperand(N0RedOp))) | ||||
13357 | return SDValue(); | ||||
13358 | } | ||||
13359 | |||||
13360 | unsigned N1RedOp = 0; | ||||
13361 | if (!IsVecReduce(N1.getOperand(N1RedOp))) | ||||
13362 | N1RedOp = 1; | ||||
13363 | if (!IsVecReduce(N1.getOperand(N1RedOp))) | ||||
13364 | return SDValue(); | ||||
13365 | |||||
13366 | SDValue Add0 = DAG.getNode(ISD::ADD, dl, VT, N0.getOperand(1 - N0RedOp), | ||||
13367 | N1.getOperand(1 - N1RedOp)); | ||||
13368 | SDValue Add1 = | ||||
13369 | DAG.getNode(ISD::ADD, dl, VT, Add0, N0.getOperand(N0RedOp)); | ||||
13370 | return DAG.getNode(ISD::ADD, dl, VT, Add1, N1.getOperand(N1RedOp)); | ||||
13371 | } | ||||
13372 | return SDValue(); | ||||
13373 | }; | ||||
13374 | if (SDValue R = DistrubuteAddAddVecReduce(N0, N1)) | ||||
13375 | return R; | ||||
13376 | if (SDValue R = DistrubuteAddAddVecReduce(N1, N0)) | ||||
13377 | return R; | ||||
13378 | |||||
13379 | // Distribute add(vecreduce(load(Y)), vecreduce(load(Z))) | ||||
13380 | // Or add(add(X, vecreduce(load(Y))), vecreduce(load(Z))) | ||||
13381 | // by ascending load offsets. This can help cores prefetch if the order of | ||||
13382 | // loads is more predictable. | ||||
13383 | auto DistrubuteVecReduceLoad = [&](SDValue N0, SDValue N1, bool IsForward) { | ||||
13384 | // Check if two reductions are known to load data where one is before/after | ||||
13385 | // another. Return negative if N0 loads data before N1, positive if N1 is | ||||
13386 | // before N0 and 0 otherwise if nothing is known. | ||||
13387 | auto IsKnownOrderedLoad = [&](SDValue N0, SDValue N1) { | ||||
13388 | // Look through to the first operand of a MUL, for the VMLA case. | ||||
13389 | // Currently only looks at the first operand, in the hope they are equal. | ||||
13390 | if (N0.getOpcode() == ISD::MUL) | ||||
13391 | N0 = N0.getOperand(0); | ||||
13392 | if (N1.getOpcode() == ISD::MUL) | ||||
13393 | N1 = N1.getOperand(0); | ||||
13394 | |||||
13395 | // Return true if the two operands are loads to the same object and the | ||||
13396 | // offset of the first is known to be less than the offset of the second. | ||||
13397 | LoadSDNode *Load0 = dyn_cast<LoadSDNode>(N0); | ||||
13398 | LoadSDNode *Load1 = dyn_cast<LoadSDNode>(N1); | ||||
13399 | if (!Load0 || !Load1 || Load0->getChain() != Load1->getChain() || | ||||
13400 | !Load0->isSimple() || !Load1->isSimple() || Load0->isIndexed() || | ||||
13401 | Load1->isIndexed()) | ||||
13402 | return 0; | ||||
13403 | |||||
13404 | auto BaseLocDecomp0 = BaseIndexOffset::match(Load0, DAG); | ||||
13405 | auto BaseLocDecomp1 = BaseIndexOffset::match(Load1, DAG); | ||||
13406 | |||||
13407 | if (!BaseLocDecomp0.getBase() || | ||||
13408 | BaseLocDecomp0.getBase() != BaseLocDecomp1.getBase() || | ||||
13409 | !BaseLocDecomp0.hasValidOffset() || !BaseLocDecomp1.hasValidOffset()) | ||||
13410 | return 0; | ||||
13411 | if (BaseLocDecomp0.getOffset() < BaseLocDecomp1.getOffset()) | ||||
13412 | return -1; | ||||
13413 | if (BaseLocDecomp0.getOffset() > BaseLocDecomp1.getOffset()) | ||||
13414 | return 1; | ||||
13415 | return 0; | ||||
13416 | }; | ||||
13417 | |||||
13418 | SDValue X; | ||||
13419 | if (N0.getOpcode() == ISD::ADD) { | ||||
13420 | if (IsVecReduce(N0.getOperand(0)) && IsVecReduce(N0.getOperand(1))) { | ||||
13421 | int IsBefore = IsKnownOrderedLoad(N0.getOperand(0).getOperand(0), | ||||
13422 | N0.getOperand(1).getOperand(0)); | ||||
13423 | if (IsBefore < 0) { | ||||
13424 | X = N0.getOperand(0); | ||||
13425 | N0 = N0.getOperand(1); | ||||
13426 | } else if (IsBefore > 0) { | ||||
13427 | X = N0.getOperand(1); | ||||
13428 | N0 = N0.getOperand(0); | ||||
13429 | } else | ||||
13430 | return SDValue(); | ||||
13431 | } else if (IsVecReduce(N0.getOperand(0))) { | ||||
13432 | X = N0.getOperand(1); | ||||
13433 | N0 = N0.getOperand(0); | ||||
13434 | } else if (IsVecReduce(N0.getOperand(1))) { | ||||
13435 | X = N0.getOperand(0); | ||||
13436 | N0 = N0.getOperand(1); | ||||
13437 | } else | ||||
13438 | return SDValue(); | ||||
13439 | } else if (IsForward && IsVecReduce(N0) && IsVecReduce(N1) && | ||||
13440 | IsKnownOrderedLoad(N0.getOperand(0), N1.getOperand(0)) < 0) { | ||||
13441 | // Note this is backward to how you would expect. We create | ||||
13442 | // add(reduce(load + 16), reduce(load + 0)) so that the | ||||
13443 | // add(reduce(load+16), X) is combined into VADDVA(X, load+16)), leaving | ||||
13444 | // the X as VADDV(load + 0) | ||||
13445 | return DAG.getNode(ISD::ADD, dl, VT, N1, N0); | ||||
13446 | } else | ||||
13447 | return SDValue(); | ||||
13448 | |||||
13449 | if (!IsVecReduce(N0) || !IsVecReduce(N1)) | ||||
13450 | return SDValue(); | ||||
13451 | |||||
13452 | if (IsKnownOrderedLoad(N1.getOperand(0), N0.getOperand(0)) >= 0) | ||||
13453 | return SDValue(); | ||||
13454 | |||||
13455 | // Switch from add(add(X, N0), N1) to add(add(X, N1), N0) | ||||
13456 | SDValue Add0 = DAG.getNode(ISD::ADD, dl, VT, X, N1); | ||||
13457 | return DAG.getNode(ISD::ADD, dl, VT, Add0, N0); | ||||
13458 | }; | ||||
13459 | if (SDValue R = DistrubuteVecReduceLoad(N0, N1, true)) | ||||
13460 | return R; | ||||
13461 | if (SDValue R = DistrubuteVecReduceLoad(N1, N0, false)) | ||||
13462 | return R; | ||||
13463 | return SDValue(); | ||||
13464 | } | ||||
13465 | |||||
13466 | static SDValue PerformADDVecReduce(SDNode *N, SelectionDAG &DAG, | ||||
13467 | const ARMSubtarget *Subtarget) { | ||||
13468 | if (!Subtarget->hasMVEIntegerOps()) | ||||
13469 | return SDValue(); | ||||
13470 | |||||
13471 | if (SDValue R = TryDistrubutionADDVecReduce(N, DAG)) | ||||
13472 | return R; | ||||
13473 | |||||
13474 | EVT VT = N->getValueType(0); | ||||
13475 | SDValue N0 = N->getOperand(0); | ||||
13476 | SDValue N1 = N->getOperand(1); | ||||
13477 | SDLoc dl(N); | ||||
13478 | |||||
13479 | if (VT != MVT::i64) | ||||
13480 | return SDValue(); | ||||
13481 | |||||
13482 | // We are looking for a i64 add of a VADDLVx. Due to these being i64's, this | ||||
13483 | // will look like: | ||||
13484 | // t1: i32,i32 = ARMISD::VADDLVs x | ||||
13485 | // t2: i64 = build_pair t1, t1:1 | ||||
13486 | // t3: i64 = add t2, y | ||||
13487 | // Otherwise we try to push the add up above VADDLVAx, to potentially allow | ||||
13488 | // the add to be simplified seperately. | ||||
13489 | // We also need to check for sext / zext and commutitive adds. | ||||
13490 | auto MakeVecReduce = [&](unsigned Opcode, unsigned OpcodeA, SDValue NA, | ||||
13491 | SDValue NB) { | ||||
13492 | if (NB->getOpcode() != ISD::BUILD_PAIR) | ||||
13493 | return SDValue(); | ||||
13494 | SDValue VecRed = NB->getOperand(0); | ||||
13495 | if ((VecRed->getOpcode() != Opcode && VecRed->getOpcode() != OpcodeA) || | ||||
13496 | VecRed.getResNo() != 0 || | ||||
13497 | NB->getOperand(1) != SDValue(VecRed.getNode(), 1)) | ||||
13498 | return SDValue(); | ||||
13499 | |||||
13500 | if (VecRed->getOpcode() == OpcodeA) { | ||||
13501 | // add(NA, VADDLVA(Inp), Y) -> VADDLVA(add(NA, Inp), Y) | ||||
13502 | SDValue Inp = DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, | ||||
13503 | VecRed.getOperand(0), VecRed.getOperand(1)); | ||||
13504 | NA = DAG.getNode(ISD::ADD, dl, MVT::i64, Inp, NA); | ||||
13505 | } | ||||
13506 | |||||
13507 | SmallVector<SDValue, 4> Ops; | ||||
13508 | Ops.push_back(DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, NA, | ||||
13509 | DAG.getConstant(0, dl, MVT::i32))); | ||||
13510 | Ops.push_back(DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, NA, | ||||
13511 | DAG.getConstant(1, dl, MVT::i32))); | ||||
13512 | unsigned S = VecRed->getOpcode() == OpcodeA ? 2 : 0; | ||||
13513 | for (unsigned I = S, E = VecRed.getNumOperands(); I < E; I++) | ||||
13514 | Ops.push_back(VecRed->getOperand(I)); | ||||
13515 | SDValue Red = | ||||
13516 | DAG.getNode(OpcodeA, dl, DAG.getVTList({MVT::i32, MVT::i32}), Ops); | ||||
13517 | return DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Red, | ||||
13518 | SDValue(Red.getNode(), 1)); | ||||
13519 | }; | ||||
13520 | |||||
13521 | if (SDValue M = MakeVecReduce(ARMISD::VADDLVs, ARMISD::VADDLVAs, N0, N1)) | ||||
13522 | return M; | ||||
13523 | if (SDValue M = MakeVecReduce(ARMISD::VADDLVu, ARMISD::VADDLVAu, N0, N1)) | ||||
13524 | return M; | ||||
13525 | if (SDValue M = MakeVecReduce(ARMISD::VADDLVs, ARMISD::VADDLVAs, N1, N0)) | ||||
13526 | return M; | ||||
13527 | if (SDValue M = MakeVecReduce(ARMISD::VADDLVu, ARMISD::VADDLVAu, N1, N0)) | ||||
13528 | return M; | ||||
13529 | if (SDValue M = MakeVecReduce(ARMISD::VADDLVps, ARMISD::VADDLVAps, N0, N1)) | ||||
13530 | return M; | ||||
13531 | if (SDValue M = MakeVecReduce(ARMISD::VADDLVpu, ARMISD::VADDLVApu, N0, N1)) | ||||
13532 | return M; | ||||
13533 | if (SDValue M = MakeVecReduce(ARMISD::VADDLVps, ARMISD::VADDLVAps, N1, N0)) | ||||
13534 | return M; | ||||
13535 | if (SDValue M = MakeVecReduce(ARMISD::VADDLVpu, ARMISD::VADDLVApu, N1, N0)) | ||||
13536 | return M; | ||||
13537 | if (SDValue M = MakeVecReduce(ARMISD::VMLALVs, ARMISD::VMLALVAs, N0, N1)) | ||||
13538 | return M; | ||||
13539 | if (SDValue M = MakeVecReduce(ARMISD::VMLALVu, ARMISD::VMLALVAu, N0, N1)) | ||||
13540 | return M; | ||||
13541 | if (SDValue M = MakeVecReduce(ARMISD::VMLALVs, ARMISD::VMLALVAs, N1, N0)) | ||||
13542 | return M; | ||||
13543 | if (SDValue M = MakeVecReduce(ARMISD::VMLALVu, ARMISD::VMLALVAu, N1, N0)) | ||||
13544 | return M; | ||||
13545 | if (SDValue M = MakeVecReduce(ARMISD::VMLALVps, ARMISD::VMLALVAps, N0, N1)) | ||||
13546 | return M; | ||||
13547 | if (SDValue M = MakeVecReduce(ARMISD::VMLALVpu, ARMISD::VMLALVApu, N0, N1)) | ||||
13548 | return M; | ||||
13549 | if (SDValue M = MakeVecReduce(ARMISD::VMLALVps, ARMISD::VMLALVAps, N1, N0)) | ||||
13550 | return M; | ||||
13551 | if (SDValue M = MakeVecReduce(ARMISD::VMLALVpu, ARMISD::VMLALVApu, N1, N0)) | ||||
13552 | return M; | ||||
13553 | return SDValue(); | ||||
13554 | } | ||||
13555 | |||||
13556 | bool | ||||
13557 | ARMTargetLowering::isDesirableToCommuteWithShift(const SDNode *N, | ||||
13558 | CombineLevel Level) const { | ||||
13559 | if (Level == BeforeLegalizeTypes) | ||||
13560 | return true; | ||||
13561 | |||||
13562 | if (N->getOpcode() != ISD::SHL) | ||||
13563 | return true; | ||||
13564 | |||||
13565 | if (Subtarget->isThumb1Only()) { | ||||
13566 | // Avoid making expensive immediates by commuting shifts. (This logic | ||||
13567 | // only applies to Thumb1 because ARM and Thumb2 immediates can be shifted | ||||
13568 | // for free.) | ||||
13569 | if (N->getOpcode() != ISD::SHL) | ||||
13570 | return true; | ||||
13571 | SDValue N1 = N->getOperand(0); | ||||
13572 | if (N1->getOpcode() != ISD::ADD && N1->getOpcode() != ISD::AND && | ||||
13573 | N1->getOpcode() != ISD::OR && N1->getOpcode() != ISD::XOR) | ||||
13574 | return true; | ||||
13575 | if (auto *Const = dyn_cast<ConstantSDNode>(N1->getOperand(1))) { | ||||
13576 | if (Const->getAPIntValue().ult(256)) | ||||
13577 | return false; | ||||
13578 | if (N1->getOpcode() == ISD::ADD && Const->getAPIntValue().slt(0) && | ||||
13579 | Const->getAPIntValue().sgt(-256)) | ||||
13580 | return false; | ||||
13581 | } | ||||
13582 | return true; | ||||
13583 | } | ||||
13584 | |||||
13585 | // Turn off commute-with-shift transform after legalization, so it doesn't | ||||
13586 | // conflict with PerformSHLSimplify. (We could try to detect when | ||||
13587 | // PerformSHLSimplify would trigger more precisely, but it isn't | ||||
13588 | // really necessary.) | ||||
13589 | return false; | ||||
13590 | } | ||||
13591 | |||||
13592 | bool ARMTargetLowering::shouldFoldConstantShiftPairToMask( | ||||
13593 | const SDNode *N, CombineLevel Level) const { | ||||
13594 | if (!Subtarget->isThumb1Only()) | ||||
13595 | return true; | ||||
13596 | |||||
13597 | if (Level == BeforeLegalizeTypes) | ||||
13598 | return true; | ||||
13599 | |||||
13600 | return false; | ||||
13601 | } | ||||
13602 | |||||
13603 | bool ARMTargetLowering::preferIncOfAddToSubOfNot(EVT VT) const { | ||||
13604 | if (!Subtarget->hasNEON()) { | ||||
13605 | if (Subtarget->isThumb1Only()) | ||||
13606 | return VT.getScalarSizeInBits() <= 32; | ||||
13607 | return true; | ||||
13608 | } | ||||
13609 | return VT.isScalarInteger(); | ||||
13610 | } | ||||
13611 | |||||
13612 | bool ARMTargetLowering::shouldConvertFpToSat(unsigned Op, EVT FPVT, | ||||
13613 | EVT VT) const { | ||||
13614 | if (!isOperationLegalOrCustom(Op, VT) || !FPVT.isSimple()) | ||||
13615 | return false; | ||||
13616 | |||||
13617 | switch (FPVT.getSimpleVT().SimpleTy) { | ||||
13618 | case MVT::f16: | ||||
13619 | return Subtarget->hasVFP2Base(); | ||||
13620 | case MVT::f32: | ||||
13621 | return Subtarget->hasVFP2Base(); | ||||
13622 | case MVT::f64: | ||||
13623 | return Subtarget->hasFP64(); | ||||
13624 | case MVT::v4f32: | ||||
13625 | case MVT::v8f16: | ||||
13626 | return Subtarget->hasMVEFloatOps(); | ||||
13627 | default: | ||||
13628 | return false; | ||||
13629 | } | ||||
13630 | } | ||||
13631 | |||||
13632 | static SDValue PerformSHLSimplify(SDNode *N, | ||||
13633 | TargetLowering::DAGCombinerInfo &DCI, | ||||
13634 | const ARMSubtarget *ST) { | ||||
13635 | // Allow the generic combiner to identify potential bswaps. | ||||
13636 | if (DCI.isBeforeLegalize()) | ||||
13637 | return SDValue(); | ||||
13638 | |||||
13639 | // DAG combiner will fold: | ||||
13640 | // (shl (add x, c1), c2) -> (add (shl x, c2), c1 << c2) | ||||
13641 | // (shl (or x, c1), c2) -> (or (shl x, c2), c1 << c2 | ||||
13642 | // Other code patterns that can be also be modified have the following form: | ||||
13643 | // b + ((a << 1) | 510) | ||||
13644 | // b + ((a << 1) & 510) | ||||
13645 | // b + ((a << 1) ^ 510) | ||||
13646 | // b + ((a << 1) + 510) | ||||
13647 | |||||
13648 | // Many instructions can perform the shift for free, but it requires both | ||||
13649 | // the operands to be registers. If c1 << c2 is too large, a mov immediate | ||||
13650 | // instruction will needed. So, unfold back to the original pattern if: | ||||
13651 | // - if c1 and c2 are small enough that they don't require mov imms. | ||||
13652 | // - the user(s) of the node can perform an shl | ||||
13653 | |||||
13654 | // No shifted operands for 16-bit instructions. | ||||
13655 | if (ST->isThumb() && ST->isThumb1Only()) | ||||
13656 | return SDValue(); | ||||
13657 | |||||
13658 | // Check that all the users could perform the shl themselves. | ||||
13659 | for (auto U : N->uses()) { | ||||
13660 | switch(U->getOpcode()) { | ||||
13661 | default: | ||||
13662 | return SDValue(); | ||||
13663 | case ISD::SUB: | ||||
13664 | case ISD::ADD: | ||||
13665 | case ISD::AND: | ||||
13666 | case ISD::OR: | ||||
13667 | case ISD::XOR: | ||||
13668 | case ISD::SETCC: | ||||
13669 | case ARMISD::CMP: | ||||
13670 | // Check that the user isn't already using a constant because there | ||||
13671 | // aren't any instructions that support an immediate operand and a | ||||
13672 | // shifted operand. | ||||
13673 | if (isa<ConstantSDNode>(U->getOperand(0)) || | ||||
13674 | isa<ConstantSDNode>(U->getOperand(1))) | ||||
13675 | return SDValue(); | ||||
13676 | |||||
13677 | // Check that it's not already using a shift. | ||||
13678 | if (U->getOperand(0).getOpcode() == ISD::SHL || | ||||
13679 | U->getOperand(1).getOpcode() == ISD::SHL) | ||||
13680 | return SDValue(); | ||||
13681 | break; | ||||
13682 | } | ||||
13683 | } | ||||
13684 | |||||
13685 | if (N->getOpcode() != ISD::ADD && N->getOpcode() != ISD::OR && | ||||
13686 | N->getOpcode() != ISD::XOR && N->getOpcode() != ISD::AND) | ||||
13687 | return SDValue(); | ||||
13688 | |||||
13689 | if (N->getOperand(0).getOpcode() != ISD::SHL) | ||||
13690 | return SDValue(); | ||||
13691 | |||||
13692 | SDValue SHL = N->getOperand(0); | ||||
13693 | |||||
13694 | auto *C1ShlC2 = dyn_cast<ConstantSDNode>(N->getOperand(1)); | ||||
13695 | auto *C2 = dyn_cast<ConstantSDNode>(SHL.getOperand(1)); | ||||
13696 | if (!C1ShlC2 || !C2) | ||||
13697 | return SDValue(); | ||||
13698 | |||||
13699 | APInt C2Int = C2->getAPIntValue(); | ||||
13700 | APInt C1Int = C1ShlC2->getAPIntValue(); | ||||
13701 | |||||
13702 | // Check that performing a lshr will not lose any information. | ||||
13703 | APInt Mask = APInt::getHighBitsSet(C2Int.getBitWidth(), | ||||
13704 | C2Int.getBitWidth() - C2->getZExtValue()); | ||||
13705 | if ((C1Int & Mask) != C1Int) | ||||
13706 | return SDValue(); | ||||
13707 | |||||
13708 | // Shift the first constant. | ||||
13709 | C1Int.lshrInPlace(C2Int); | ||||
13710 | |||||
13711 | // The immediates are encoded as an 8-bit value that can be rotated. | ||||
13712 | auto LargeImm = [](const APInt &Imm) { | ||||
13713 | unsigned Zeros = Imm.countLeadingZeros() + Imm.countTrailingZeros(); | ||||
13714 | return Imm.getBitWidth() - Zeros > 8; | ||||
13715 | }; | ||||
13716 | |||||
13717 | if (LargeImm(C1Int) || LargeImm(C2Int)) | ||||
13718 | return SDValue(); | ||||
13719 | |||||
13720 | SelectionDAG &DAG = DCI.DAG; | ||||
13721 | SDLoc dl(N); | ||||
13722 | SDValue X = SHL.getOperand(0); | ||||
13723 | SDValue BinOp = DAG.getNode(N->getOpcode(), dl, MVT::i32, X, | ||||
13724 | DAG.getConstant(C1Int, dl, MVT::i32)); | ||||
13725 | // Shift left to compensate for the lshr of C1Int. | ||||
13726 | SDValue Res = DAG.getNode(ISD::SHL, dl, MVT::i32, BinOp, SHL.getOperand(1)); | ||||
13727 | |||||
13728 | LLVM_DEBUG(dbgs() << "Simplify shl use:\n"; SHL.getOperand(0).dump();do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("arm-isel")) { dbgs() << "Simplify shl use:\n"; SHL.getOperand (0).dump(); SHL.dump(); N->dump(); } } while (false) | ||||
13729 | SHL.dump(); N->dump())do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("arm-isel")) { dbgs() << "Simplify shl use:\n"; SHL.getOperand (0).dump(); SHL.dump(); N->dump(); } } while (false); | ||||
13730 | LLVM_DEBUG(dbgs() << "Into:\n"; X.dump(); BinOp.dump(); Res.dump())do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("arm-isel")) { dbgs() << "Into:\n"; X.dump(); BinOp.dump (); Res.dump(); } } while (false); | ||||
13731 | return Res; | ||||
13732 | } | ||||
13733 | |||||
13734 | |||||
13735 | /// PerformADDCombine - Target-specific dag combine xforms for ISD::ADD. | ||||
13736 | /// | ||||
13737 | static SDValue PerformADDCombine(SDNode *N, | ||||
13738 | TargetLowering::DAGCombinerInfo &DCI, | ||||
13739 | const ARMSubtarget *Subtarget) { | ||||
13740 | SDValue N0 = N->getOperand(0); | ||||
13741 | SDValue N1 = N->getOperand(1); | ||||
13742 | |||||
13743 | // Only works one way, because it needs an immediate operand. | ||||
13744 | if (SDValue Result = PerformSHLSimplify(N, DCI, Subtarget)) | ||||
13745 | return Result; | ||||
13746 | |||||
13747 | if (SDValue Result = PerformADDVecReduce(N, DCI.DAG, Subtarget)) | ||||
13748 | return Result; | ||||
13749 | |||||
13750 | // First try with the default operand order. | ||||
13751 | if (SDValue Result = PerformADDCombineWithOperands(N, N0, N1, DCI, Subtarget)) | ||||
13752 | return Result; | ||||
13753 | |||||
13754 | // If that didn't work, try again with the operands commuted. | ||||
13755 | return PerformADDCombineWithOperands(N, N1, N0, DCI, Subtarget); | ||||
13756 | } | ||||
13757 | |||||
13758 | // Combine (sub 0, (csinc X, Y, CC)) -> (csinv -X, Y, CC) | ||||
13759 | // providing -X is as cheap as X (currently, just a constant). | ||||
13760 | static SDValue PerformSubCSINCCombine(SDNode *N, SelectionDAG &DAG) { | ||||
13761 | if (N->getValueType(0) != MVT::i32 || !isNullConstant(N->getOperand(0))) | ||||
13762 | return SDValue(); | ||||
13763 | SDValue CSINC = N->getOperand(1); | ||||
13764 | if (CSINC.getOpcode() != ARMISD::CSINC || !CSINC.hasOneUse()) | ||||
13765 | return SDValue(); | ||||
13766 | |||||
13767 | ConstantSDNode *X = dyn_cast<ConstantSDNode>(CSINC.getOperand(0)); | ||||
13768 | if (!X) | ||||
13769 | return SDValue(); | ||||
13770 | |||||
13771 | return DAG.getNode(ARMISD::CSINV, SDLoc(N), MVT::i32, | ||||
13772 | DAG.getNode(ISD::SUB, SDLoc(N), MVT::i32, N->getOperand(0), | ||||
13773 | CSINC.getOperand(0)), | ||||
13774 | CSINC.getOperand(1), CSINC.getOperand(2), | ||||
13775 | CSINC.getOperand(3)); | ||||
13776 | } | ||||
13777 | |||||
13778 | /// PerformSUBCombine - Target-specific dag combine xforms for ISD::SUB. | ||||
13779 | /// | ||||
13780 | static SDValue PerformSUBCombine(SDNode *N, | ||||
13781 | TargetLowering::DAGCombinerInfo &DCI, | ||||
13782 | const ARMSubtarget *Subtarget) { | ||||
13783 | SDValue N0 = N->getOperand(0); | ||||
13784 | SDValue N1 = N->getOperand(1); | ||||
13785 | |||||
13786 | // fold (sub x, (select cc, 0, c)) -> (select cc, x, (sub, x, c)) | ||||
13787 | if (N1.getNode()->hasOneUse()) | ||||
13788 | if (SDValue Result = combineSelectAndUse(N, N1, N0, DCI)) | ||||
13789 | return Result; | ||||
13790 | |||||
13791 | if (SDValue R = PerformSubCSINCCombine(N, DCI.DAG)) | ||||
13792 | return R; | ||||
13793 | |||||
13794 | if (!Subtarget->hasMVEIntegerOps() || !N->getValueType(0).isVector()) | ||||
13795 | return SDValue(); | ||||
13796 | |||||
13797 | // Fold (sub (ARMvmovImm 0), (ARMvdup x)) -> (ARMvdup (sub 0, x)) | ||||
13798 | // so that we can readily pattern match more mve instructions which can use | ||||
13799 | // a scalar operand. | ||||
13800 | SDValue VDup = N->getOperand(1); | ||||
13801 | if (VDup->getOpcode() != ARMISD::VDUP) | ||||
13802 | return SDValue(); | ||||
13803 | |||||
13804 | SDValue VMov = N->getOperand(0); | ||||
13805 | if (VMov->getOpcode() == ISD::BITCAST) | ||||
13806 | VMov = VMov->getOperand(0); | ||||
13807 | |||||
13808 | if (VMov->getOpcode() != ARMISD::VMOVIMM || !isZeroVector(VMov)) | ||||
13809 | return SDValue(); | ||||
13810 | |||||
13811 | SDLoc dl(N); | ||||
13812 | SDValue Negate = DCI.DAG.getNode(ISD::SUB, dl, MVT::i32, | ||||
13813 | DCI.DAG.getConstant(0, dl, MVT::i32), | ||||
13814 | VDup->getOperand(0)); | ||||
13815 | return DCI.DAG.getNode(ARMISD::VDUP, dl, N->getValueType(0), Negate); | ||||
13816 | } | ||||
13817 | |||||
13818 | /// PerformVMULCombine | ||||
13819 | /// Distribute (A + B) * C to (A * C) + (B * C) to take advantage of the | ||||
13820 | /// special multiplier accumulator forwarding. | ||||
13821 | /// vmul d3, d0, d2 | ||||
13822 | /// vmla d3, d1, d2 | ||||
13823 | /// is faster than | ||||
13824 | /// vadd d3, d0, d1 | ||||
13825 | /// vmul d3, d3, d2 | ||||
13826 | // However, for (A + B) * (A + B), | ||||
13827 | // vadd d2, d0, d1 | ||||
13828 | // vmul d3, d0, d2 | ||||
13829 | // vmla d3, d1, d2 | ||||
13830 | // is slower than | ||||
13831 | // vadd d2, d0, d1 | ||||
13832 | // vmul d3, d2, d2 | ||||
13833 | static SDValue PerformVMULCombine(SDNode *N, | ||||
13834 | TargetLowering::DAGCombinerInfo &DCI, | ||||
13835 | const ARMSubtarget *Subtarget) { | ||||
13836 | if (!Subtarget->hasVMLxForwarding()) | ||||
13837 | return SDValue(); | ||||
13838 | |||||
13839 | SelectionDAG &DAG = DCI.DAG; | ||||
13840 | SDValue N0 = N->getOperand(0); | ||||
13841 | SDValue N1 = N->getOperand(1); | ||||
13842 | unsigned Opcode = N0.getOpcode(); | ||||
13843 | if (Opcode != ISD::ADD && Opcode != ISD::SUB && | ||||
13844 | Opcode != ISD::FADD && Opcode != ISD::FSUB) { | ||||
13845 | Opcode = N1.getOpcode(); | ||||
13846 | if (Opcode != ISD::ADD && Opcode != ISD::SUB && | ||||
13847 | Opcode != ISD::FADD && Opcode != ISD::FSUB) | ||||
13848 | return SDValue(); | ||||
13849 | std::swap(N0, N1); | ||||
13850 | } | ||||
13851 | |||||
13852 | if (N0 == N1) | ||||
13853 | return SDValue(); | ||||
13854 | |||||
13855 | EVT VT = N->getValueType(0); | ||||
13856 | SDLoc DL(N); | ||||
13857 | SDValue N00 = N0->getOperand(0); | ||||
13858 | SDValue N01 = N0->getOperand(1); | ||||
13859 | return DAG.getNode(Opcode, DL, VT, | ||||
13860 | DAG.getNode(ISD::MUL, DL, VT, N00, N1), | ||||
13861 | DAG.getNode(ISD::MUL, DL, VT, N01, N1)); | ||||
13862 | } | ||||
13863 | |||||
13864 | static SDValue PerformMVEVMULLCombine(SDNode *N, SelectionDAG &DAG, | ||||
13865 | const ARMSubtarget *Subtarget) { | ||||
13866 | EVT VT = N->getValueType(0); | ||||
13867 | if (VT != MVT::v2i64) | ||||
13868 | return SDValue(); | ||||
13869 | |||||
13870 | SDValue N0 = N->getOperand(0); | ||||
13871 | SDValue N1 = N->getOperand(1); | ||||
13872 | |||||
13873 | auto IsSignExt = [&](SDValue Op) { | ||||
13874 | if (Op->getOpcode() != ISD::SIGN_EXTEND_INREG) | ||||
13875 | return SDValue(); | ||||
13876 | EVT VT = cast<VTSDNode>(Op->getOperand(1))->getVT(); | ||||
13877 | if (VT.getScalarSizeInBits() == 32) | ||||
13878 | return Op->getOperand(0); | ||||
13879 | return SDValue(); | ||||
13880 | }; | ||||
13881 | auto IsZeroExt = [&](SDValue Op) { | ||||
13882 | // Zero extends are a little more awkward. At the point we are matching | ||||
13883 | // this, we are looking for an AND with a (-1, 0, -1, 0) buildvector mask. | ||||
13884 | // That might be before of after a bitcast depending on how the and is | ||||
13885 | // placed. Because this has to look through bitcasts, it is currently only | ||||
13886 | // supported on LE. | ||||
13887 | if (!Subtarget->isLittle()) | ||||
13888 | return SDValue(); | ||||
13889 | |||||
13890 | SDValue And = Op; | ||||
13891 | if (And->getOpcode() == ISD::BITCAST) | ||||
13892 | And = And->getOperand(0); | ||||
13893 | if (And->getOpcode() != ISD::AND) | ||||
13894 | return SDValue(); | ||||
13895 | SDValue Mask = And->getOperand(1); | ||||
13896 | if (Mask->getOpcode() == ISD::BITCAST) | ||||
13897 | Mask = Mask->getOperand(0); | ||||
13898 | |||||
13899 | if (Mask->getOpcode() != ISD::BUILD_VECTOR || | ||||
13900 | Mask.getValueType() != MVT::v4i32) | ||||
13901 | return SDValue(); | ||||
13902 | if (isAllOnesConstant(Mask->getOperand(0)) && | ||||
13903 | isNullConstant(Mask->getOperand(1)) && | ||||
13904 | isAllOnesConstant(Mask->getOperand(2)) && | ||||
13905 | isNullConstant(Mask->getOperand(3))) | ||||
13906 | return And->getOperand(0); | ||||
13907 | return SDValue(); | ||||
13908 | }; | ||||
13909 | |||||
13910 | SDLoc dl(N); | ||||
13911 | if (SDValue Op0 = IsSignExt(N0)) { | ||||
13912 | if (SDValue Op1 = IsSignExt(N1)) { | ||||
13913 | SDValue New0a = DAG.getNode(ARMISD::VECTOR_REG_CAST, dl, MVT::v4i32, Op0); | ||||
13914 | SDValue New1a = DAG.getNode(ARMISD::VECTOR_REG_CAST, dl, MVT::v4i32, Op1); | ||||
13915 | return DAG.getNode(ARMISD::VMULLs, dl, VT, New0a, New1a); | ||||
13916 | } | ||||
13917 | } | ||||
13918 | if (SDValue Op0 = IsZeroExt(N0)) { | ||||
13919 | if (SDValue Op1 = IsZeroExt(N1)) { | ||||
13920 | SDValue New0a = DAG.getNode(ARMISD::VECTOR_REG_CAST, dl, MVT::v4i32, Op0); | ||||
13921 | SDValue New1a = DAG.getNode(ARMISD::VECTOR_REG_CAST, dl, MVT::v4i32, Op1); | ||||
13922 | return DAG.getNode(ARMISD::VMULLu, dl, VT, New0a, New1a); | ||||
13923 | } | ||||
13924 | } | ||||
13925 | |||||
13926 | return SDValue(); | ||||
13927 | } | ||||
13928 | |||||
13929 | static SDValue PerformMULCombine(SDNode *N, | ||||
13930 | TargetLowering::DAGCombinerInfo &DCI, | ||||
13931 | const ARMSubtarget *Subtarget) { | ||||
13932 | SelectionDAG &DAG = DCI.DAG; | ||||
13933 | |||||
13934 | EVT VT = N->getValueType(0); | ||||
13935 | if (Subtarget->hasMVEIntegerOps() && VT == MVT::v2i64) | ||||
13936 | return PerformMVEVMULLCombine(N, DAG, Subtarget); | ||||
13937 | |||||
13938 | if (Subtarget->isThumb1Only()) | ||||
13939 | return SDValue(); | ||||
13940 | |||||
13941 | if (DCI.isBeforeLegalize() || DCI.isCalledByLegalizer()) | ||||
13942 | return SDValue(); | ||||
13943 | |||||
13944 | if (VT.is64BitVector() || VT.is128BitVector()) | ||||
13945 | return PerformVMULCombine(N, DCI, Subtarget); | ||||
13946 | if (VT != MVT::i32) | ||||
13947 | return SDValue(); | ||||
13948 | |||||
13949 | ConstantSDNode *C = dyn_cast<ConstantSDNode>(N->getOperand(1)); | ||||
13950 | if (!C) | ||||
13951 | return SDValue(); | ||||
13952 | |||||
13953 | int64_t MulAmt = C->getSExtValue(); | ||||
13954 | unsigned ShiftAmt = countTrailingZeros<uint64_t>(MulAmt); | ||||
13955 | |||||
13956 | ShiftAmt = ShiftAmt & (32 - 1); | ||||
13957 | SDValue V = N->getOperand(0); | ||||
13958 | SDLoc DL(N); | ||||
13959 | |||||
13960 | SDValue Res; | ||||
13961 | MulAmt >>= ShiftAmt; | ||||
13962 | |||||
13963 | if (MulAmt >= 0) { | ||||
13964 | if (isPowerOf2_32(MulAmt - 1)) { | ||||
13965 | // (mul x, 2^N + 1) => (add (shl x, N), x) | ||||
13966 | Res = DAG.getNode(ISD::ADD, DL, VT, | ||||
13967 | V, | ||||
13968 | DAG.getNode(ISD::SHL, DL, VT, | ||||
13969 | V, | ||||
13970 | DAG.getConstant(Log2_32(MulAmt - 1), DL, | ||||
13971 | MVT::i32))); | ||||
13972 | } else if (isPowerOf2_32(MulAmt + 1)) { | ||||
13973 | // (mul x, 2^N - 1) => (sub (shl x, N), x) | ||||
13974 | Res = DAG.getNode(ISD::SUB, DL, VT, | ||||
13975 | DAG.getNode(ISD::SHL, DL, VT, | ||||
13976 | V, | ||||
13977 | DAG.getConstant(Log2_32(MulAmt + 1), DL, | ||||
13978 | MVT::i32)), | ||||
13979 | V); | ||||
13980 | } else | ||||
13981 | return SDValue(); | ||||
13982 | } else { | ||||
13983 | uint64_t MulAmtAbs = -MulAmt; | ||||
13984 | if (isPowerOf2_32(MulAmtAbs + 1)) { | ||||
13985 | // (mul x, -(2^N - 1)) => (sub x, (shl x, N)) | ||||
13986 | Res = DAG.getNode(ISD::SUB, DL, VT, | ||||
13987 | V, | ||||
13988 | DAG.getNode(ISD::SHL, DL, VT, | ||||
13989 | V, | ||||
13990 | DAG.getConstant(Log2_32(MulAmtAbs + 1), DL, | ||||
13991 | MVT::i32))); | ||||
13992 | } else if (isPowerOf2_32(MulAmtAbs - 1)) { | ||||
13993 | // (mul x, -(2^N + 1)) => - (add (shl x, N), x) | ||||
13994 | Res = DAG.getNode(ISD::ADD, DL, VT, | ||||
13995 | V, | ||||
13996 | DAG.getNode(ISD::SHL, DL, VT, | ||||
13997 | V, | ||||
13998 | DAG.getConstant(Log2_32(MulAmtAbs - 1), DL, | ||||
13999 | MVT::i32))); | ||||
14000 | Res = DAG.getNode(ISD::SUB, DL, VT, | ||||
14001 | DAG.getConstant(0, DL, MVT::i32), Res); | ||||
14002 | } else | ||||
14003 | return SDValue(); | ||||
14004 | } | ||||
14005 | |||||
14006 | if (ShiftAmt != 0) | ||||
14007 | Res = DAG.getNode(ISD::SHL, DL, VT, | ||||
14008 | Res, DAG.getConstant(ShiftAmt, DL, MVT::i32)); | ||||
14009 | |||||
14010 | // Do not add new nodes to DAG combiner worklist. | ||||
14011 | DCI.CombineTo(N, Res, false); | ||||
14012 | return SDValue(); | ||||
14013 | } | ||||
14014 | |||||
14015 | static SDValue CombineANDShift(SDNode *N, | ||||
14016 | TargetLowering::DAGCombinerInfo &DCI, | ||||
14017 | const ARMSubtarget *Subtarget) { | ||||
14018 | // Allow DAGCombine to pattern-match before we touch the canonical form. | ||||
14019 | if (DCI.isBeforeLegalize() || DCI.isCalledByLegalizer()) | ||||
14020 | return SDValue(); | ||||
14021 | |||||
14022 | if (N->getValueType(0) != MVT::i32) | ||||
14023 | return SDValue(); | ||||
14024 | |||||
14025 | ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N->getOperand(1)); | ||||
14026 | if (!N1C) | ||||
14027 | return SDValue(); | ||||
14028 | |||||
14029 | uint32_t C1 = (uint32_t)N1C->getZExtValue(); | ||||
14030 | // Don't transform uxtb/uxth. | ||||
14031 | if (C1 == 255 || C1 == 65535) | ||||
14032 | return SDValue(); | ||||
14033 | |||||
14034 | SDNode *N0 = N->getOperand(0).getNode(); | ||||
14035 | if (!N0->hasOneUse()) | ||||
14036 | return SDValue(); | ||||
14037 | |||||
14038 | if (N0->getOpcode() != ISD::SHL && N0->getOpcode() != ISD::SRL) | ||||
14039 | return SDValue(); | ||||
14040 | |||||
14041 | bool LeftShift = N0->getOpcode() == ISD::SHL; | ||||
14042 | |||||
14043 | ConstantSDNode *N01C = dyn_cast<ConstantSDNode>(N0->getOperand(1)); | ||||
14044 | if (!N01C) | ||||
14045 | return SDValue(); | ||||
14046 | |||||
14047 | uint32_t C2 = (uint32_t)N01C->getZExtValue(); | ||||
14048 | if (!C2 || C2 >= 32) | ||||
14049 | return SDValue(); | ||||
14050 | |||||
14051 | // Clear irrelevant bits in the mask. | ||||
14052 | if (LeftShift) | ||||
14053 | C1 &= (-1U << C2); | ||||
14054 | else | ||||
14055 | C1 &= (-1U >> C2); | ||||
14056 | |||||
14057 | SelectionDAG &DAG = DCI.DAG; | ||||
14058 | SDLoc DL(N); | ||||
14059 | |||||
14060 | // We have a pattern of the form "(and (shl x, c2) c1)" or | ||||
14061 | // "(and (srl x, c2) c1)", where c1 is a shifted mask. Try to | ||||
14062 | // transform to a pair of shifts, to save materializing c1. | ||||
14063 | |||||
14064 | // First pattern: right shift, then mask off leading bits. | ||||
14065 | // FIXME: Use demanded bits? | ||||
14066 | if (!LeftShift && isMask_32(C1)) { | ||||
14067 | uint32_t C3 = countLeadingZeros(C1); | ||||
14068 | if (C2 < C3) { | ||||
14069 | SDValue SHL = DAG.getNode(ISD::SHL, DL, MVT::i32, N0->getOperand(0), | ||||
14070 | DAG.getConstant(C3 - C2, DL, MVT::i32)); | ||||
14071 | return DAG.getNode(ISD::SRL, DL, MVT::i32, SHL, | ||||
14072 | DAG.getConstant(C3, DL, MVT::i32)); | ||||
14073 | } | ||||
14074 | } | ||||
14075 | |||||
14076 | // First pattern, reversed: left shift, then mask off trailing bits. | ||||
14077 | if (LeftShift && isMask_32(~C1)) { | ||||
14078 | uint32_t C3 = countTrailingZeros(C1); | ||||
14079 | if (C2 < C3) { | ||||
14080 | SDValue SHL = DAG.getNode(ISD::SRL, DL, MVT::i32, N0->getOperand(0), | ||||
14081 | DAG.getConstant(C3 - C2, DL, MVT::i32)); | ||||
14082 | return DAG.getNode(ISD::SHL, DL, MVT::i32, SHL, | ||||
14083 | DAG.getConstant(C3, DL, MVT::i32)); | ||||
14084 | } | ||||
14085 | } | ||||
14086 | |||||
14087 | // Second pattern: left shift, then mask off leading bits. | ||||
14088 | // FIXME: Use demanded bits? | ||||
14089 | if (LeftShift && isShiftedMask_32(C1)) { | ||||
14090 | uint32_t Trailing = countTrailingZeros(C1); | ||||
14091 | uint32_t C3 = countLeadingZeros(C1); | ||||
14092 | if (Trailing == C2 && C2 + C3 < 32) { | ||||
14093 | SDValue SHL = DAG.getNode(ISD::SHL, DL, MVT::i32, N0->getOperand(0), | ||||
14094 | DAG.getConstant(C2 + C3, DL, MVT::i32)); | ||||
14095 | return DAG.getNode(ISD::SRL, DL, MVT::i32, SHL, | ||||
14096 | DAG.getConstant(C3, DL, MVT::i32)); | ||||
14097 | } | ||||
14098 | } | ||||
14099 | |||||
14100 | // Second pattern, reversed: right shift, then mask off trailing bits. | ||||
14101 | // FIXME: Handle other patterns of known/demanded bits. | ||||
14102 | if (!LeftShift && isShiftedMask_32(C1)) { | ||||
14103 | uint32_t Leading = countLeadingZeros(C1); | ||||
14104 | uint32_t C3 = countTrailingZeros(C1); | ||||
14105 | if (Leading == C2 && C2 + C3 < 32) { | ||||
14106 | SDValue SHL = DAG.getNode(ISD::SRL, DL, MVT::i32, N0->getOperand(0), | ||||
14107 | DAG.getConstant(C2 + C3, DL, MVT::i32)); | ||||
14108 | return DAG.getNode(ISD::SHL, DL, MVT::i32, SHL, | ||||
14109 | DAG.getConstant(C3, DL, MVT::i32)); | ||||
14110 | } | ||||
14111 | } | ||||
14112 | |||||
14113 | // FIXME: Transform "(and (shl x, c2) c1)" -> | ||||
14114 | // "(shl (and x, c1>>c2), c2)" if "c1 >> c2" is a cheaper immediate than | ||||
14115 | // c1. | ||||
14116 | return SDValue(); | ||||
14117 | } | ||||
14118 | |||||
14119 | static SDValue PerformANDCombine(SDNode *N, | ||||
14120 | TargetLowering::DAGCombinerInfo &DCI, | ||||
14121 | const ARMSubtarget *Subtarget) { | ||||
14122 | // Attempt to use immediate-form VBIC | ||||
14123 | BuildVectorSDNode *BVN = dyn_cast<BuildVectorSDNode>(N->getOperand(1)); | ||||
14124 | SDLoc dl(N); | ||||
14125 | EVT VT = N->getValueType(0); | ||||
14126 | SelectionDAG &DAG = DCI.DAG; | ||||
14127 | |||||
14128 | if (!DAG.getTargetLoweringInfo().isTypeLegal(VT) || VT == MVT::v2i1 || | ||||
14129 | VT == MVT::v4i1 || VT == MVT::v8i1 || VT == MVT::v16i1) | ||||
14130 | return SDValue(); | ||||
14131 | |||||
14132 | APInt SplatBits, SplatUndef; | ||||
14133 | unsigned SplatBitSize; | ||||
14134 | bool HasAnyUndefs; | ||||
14135 | if (BVN && (Subtarget->hasNEON() || Subtarget->hasMVEIntegerOps()) && | ||||
14136 | BVN->isConstantSplat(SplatBits, SplatUndef, SplatBitSize, HasAnyUndefs)) { | ||||
14137 | if (SplatBitSize == 8 || SplatBitSize == 16 || SplatBitSize == 32 || | ||||
14138 | SplatBitSize == 64) { | ||||
14139 | EVT VbicVT; | ||||
14140 | SDValue Val = isVMOVModifiedImm((~SplatBits).getZExtValue(), | ||||
14141 | SplatUndef.getZExtValue(), SplatBitSize, | ||||
14142 | DAG, dl, VbicVT, VT, OtherModImm); | ||||
14143 | if (Val.getNode()) { | ||||
14144 | SDValue Input = | ||||
14145 | DAG.getNode(ISD::BITCAST, dl, VbicVT, N->getOperand(0)); | ||||
14146 | SDValue Vbic = DAG.getNode(ARMISD::VBICIMM, dl, VbicVT, Input, Val); | ||||
14147 | return DAG.getNode(ISD::BITCAST, dl, VT, Vbic); | ||||
14148 | } | ||||
14149 | } | ||||
14150 | } | ||||
14151 | |||||
14152 | if (!Subtarget->isThumb1Only()) { | ||||
14153 | // fold (and (select cc, -1, c), x) -> (select cc, x, (and, x, c)) | ||||
14154 | if (SDValue Result = combineSelectAndUseCommutative(N, true, DCI)) | ||||
14155 | return Result; | ||||
14156 | |||||
14157 | if (SDValue Result = PerformSHLSimplify(N, DCI, Subtarget)) | ||||
14158 | return Result; | ||||
14159 | } | ||||
14160 | |||||
14161 | if (Subtarget->isThumb1Only()) | ||||
14162 | if (SDValue Result = CombineANDShift(N, DCI, Subtarget)) | ||||
14163 | return Result; | ||||
14164 | |||||
14165 | return SDValue(); | ||||
14166 | } | ||||
14167 | |||||
14168 | // Try combining OR nodes to SMULWB, SMULWT. | ||||
14169 | static SDValue PerformORCombineToSMULWBT(SDNode *OR, | ||||
14170 | TargetLowering::DAGCombinerInfo &DCI, | ||||
14171 | const ARMSubtarget *Subtarget) { | ||||
14172 | if (!Subtarget->hasV6Ops() || | ||||
14173 | (Subtarget->isThumb() && | ||||
14174 | (!Subtarget->hasThumb2() || !Subtarget->hasDSP()))) | ||||
14175 | return SDValue(); | ||||
14176 | |||||
14177 | SDValue SRL = OR->getOperand(0); | ||||
14178 | SDValue SHL = OR->getOperand(1); | ||||
14179 | |||||
14180 | if (SRL.getOpcode() != ISD::SRL || SHL.getOpcode() != ISD::SHL) { | ||||
14181 | SRL = OR->getOperand(1); | ||||
14182 | SHL = OR->getOperand(0); | ||||
14183 | } | ||||
14184 | if (!isSRL16(SRL) || !isSHL16(SHL)) | ||||
14185 | return SDValue(); | ||||
14186 | |||||
14187 | // The first operands to the shifts need to be the two results from the | ||||
14188 | // same smul_lohi node. | ||||
14189 | if ((SRL.getOperand(0).getNode() != SHL.getOperand(0).getNode()) || | ||||
14190 | SRL.getOperand(0).getOpcode() != ISD::SMUL_LOHI) | ||||
14191 | return SDValue(); | ||||
14192 | |||||
14193 | SDNode *SMULLOHI = SRL.getOperand(0).getNode(); | ||||
14194 | if (SRL.getOperand(0) != SDValue(SMULLOHI, 0) || | ||||
14195 | SHL.getOperand(0) != SDValue(SMULLOHI, 1)) | ||||
14196 | return SDValue(); | ||||
14197 | |||||
14198 | // Now we have: | ||||
14199 | // (or (srl (smul_lohi ?, ?), 16), (shl (smul_lohi ?, ?), 16))) | ||||
14200 | // For SMUL[B|T] smul_lohi will take a 32-bit and a 16-bit arguments. | ||||
14201 | // For SMUWB the 16-bit value will signed extended somehow. | ||||
14202 | // For SMULWT only the SRA is required. | ||||
14203 | // Check both sides of SMUL_LOHI | ||||
14204 | SDValue OpS16 = SMULLOHI->getOperand(0); | ||||
14205 | SDValue OpS32 = SMULLOHI->getOperand(1); | ||||
14206 | |||||
14207 | SelectionDAG &DAG = DCI.DAG; | ||||
14208 | if (!isS16(OpS16, DAG) && !isSRA16(OpS16)) { | ||||
14209 | OpS16 = OpS32; | ||||
14210 | OpS32 = SMULLOHI->getOperand(0); | ||||
14211 | } | ||||
14212 | |||||
14213 | SDLoc dl(OR); | ||||
14214 | unsigned Opcode = 0; | ||||
14215 | if (isS16(OpS16, DAG)) | ||||
14216 | Opcode = ARMISD::SMULWB; | ||||
14217 | else if (isSRA16(OpS16)) { | ||||
14218 | Opcode = ARMISD::SMULWT; | ||||
14219 | OpS16 = OpS16->getOperand(0); | ||||
14220 | } | ||||
14221 | else | ||||
14222 | return SDValue(); | ||||
14223 | |||||
14224 | SDValue Res = DAG.getNode(Opcode, dl, MVT::i32, OpS32, OpS16); | ||||
14225 | DAG.ReplaceAllUsesOfValueWith(SDValue(OR, 0), Res); | ||||
14226 | return SDValue(OR, 0); | ||||
14227 | } | ||||
14228 | |||||
14229 | static SDValue PerformORCombineToBFI(SDNode *N, | ||||
14230 | TargetLowering::DAGCombinerInfo &DCI, | ||||
14231 | const ARMSubtarget *Subtarget) { | ||||
14232 | // BFI is only available on V6T2+ | ||||
14233 | if (Subtarget->isThumb1Only() || !Subtarget->hasV6T2Ops()) | ||||
14234 | return SDValue(); | ||||
14235 | |||||
14236 | EVT VT = N->getValueType(0); | ||||
14237 | SDValue N0 = N->getOperand(0); | ||||
14238 | SDValue N1 = N->getOperand(1); | ||||
14239 | SelectionDAG &DAG = DCI.DAG; | ||||
14240 | SDLoc DL(N); | ||||
14241 | // 1) or (and A, mask), val => ARMbfi A, val, mask | ||||
14242 | // iff (val & mask) == val | ||||
14243 | // | ||||
14244 | // 2) or (and A, mask), (and B, mask2) => ARMbfi A, (lsr B, amt), mask | ||||
14245 | // 2a) iff isBitFieldInvertedMask(mask) && isBitFieldInvertedMask(~mask2) | ||||
14246 | // && mask == ~mask2 | ||||
14247 | // 2b) iff isBitFieldInvertedMask(~mask) && isBitFieldInvertedMask(mask2) | ||||
14248 | // && ~mask == mask2 | ||||
14249 | // (i.e., copy a bitfield value into another bitfield of the same width) | ||||
14250 | |||||
14251 | if (VT != MVT::i32) | ||||
14252 | return SDValue(); | ||||
14253 | |||||
14254 | SDValue N00 = N0.getOperand(0); | ||||
14255 | |||||
14256 | // The value and the mask need to be constants so we can verify this is | ||||
14257 | // actually a bitfield set. If the mask is 0xffff, we can do better | ||||
14258 | // via a movt instruction, so don't use BFI in that case. | ||||
14259 | SDValue MaskOp = N0.getOperand(1); | ||||
14260 | ConstantSDNode *MaskC = dyn_cast<ConstantSDNode>(MaskOp); | ||||
14261 | if (!MaskC) | ||||
14262 | return SDValue(); | ||||
14263 | unsigned Mask = MaskC->getZExtValue(); | ||||
14264 | if (Mask == 0xffff) | ||||
14265 | return SDValue(); | ||||
14266 | SDValue Res; | ||||
14267 | // Case (1): or (and A, mask), val => ARMbfi A, val, mask | ||||
14268 | ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1); | ||||
14269 | if (N1C) { | ||||
14270 | unsigned Val = N1C->getZExtValue(); | ||||
14271 | if ((Val & ~Mask) != Val) | ||||
14272 | return SDValue(); | ||||
14273 | |||||
14274 | if (ARM::isBitFieldInvertedMask(Mask)) { | ||||
14275 | Val >>= countTrailingZeros(~Mask); | ||||
14276 | |||||
14277 | Res = DAG.getNode(ARMISD::BFI, DL, VT, N00, | ||||
14278 | DAG.getConstant(Val, DL, MVT::i32), | ||||
14279 | DAG.getConstant(Mask, DL, MVT::i32)); | ||||
14280 | |||||
14281 | DCI.CombineTo(N, Res, false); | ||||
14282 | // Return value from the original node to inform the combiner than N is | ||||
14283 | // now dead. | ||||
14284 | return SDValue(N, 0); | ||||
14285 | } | ||||
14286 | } else if (N1.getOpcode() == ISD::AND) { | ||||
14287 | // case (2) or (and A, mask), (and B, mask2) => ARMbfi A, (lsr B, amt), mask | ||||
14288 | ConstantSDNode *N11C = dyn_cast<ConstantSDNode>(N1.getOperand(1)); | ||||
14289 | if (!N11C) | ||||
14290 | return SDValue(); | ||||
14291 | unsigned Mask2 = N11C->getZExtValue(); | ||||
14292 | |||||
14293 | // Mask and ~Mask2 (or reverse) must be equivalent for the BFI pattern | ||||
14294 | // as is to match. | ||||
14295 | if (ARM::isBitFieldInvertedMask(Mask) && | ||||
14296 | (Mask == ~Mask2)) { | ||||
14297 | // The pack halfword instruction works better for masks that fit it, | ||||
14298 | // so use that when it's available. | ||||
14299 | if (Subtarget->hasDSP() && | ||||
14300 | (Mask == 0xffff || Mask == 0xffff0000)) | ||||
14301 | return SDValue(); | ||||
14302 | // 2a | ||||
14303 | unsigned amt = countTrailingZeros(Mask2); | ||||
14304 | Res = DAG.getNode(ISD::SRL, DL, VT, N1.getOperand(0), | ||||
14305 | DAG.getConstant(amt, DL, MVT::i32)); | ||||
14306 | Res = DAG.getNode(ARMISD::BFI, DL, VT, N00, Res, | ||||
14307 | DAG.getConstant(Mask, DL, MVT::i32)); | ||||
14308 | DCI.CombineTo(N, Res, false); | ||||
14309 | // Return value from the original node to inform the combiner than N is | ||||
14310 | // now dead. | ||||
14311 | return SDValue(N, 0); | ||||
14312 | } else if (ARM::isBitFieldInvertedMask(~Mask) && | ||||
14313 | (~Mask == Mask2)) { | ||||
14314 | // The pack halfword instruction works better for masks that fit it, | ||||
14315 | // so use that when it's available. | ||||
14316 | if (Subtarget->hasDSP() && | ||||
14317 | (Mask2 == 0xffff || Mask2 == 0xffff0000)) | ||||
14318 | return SDValue(); | ||||
14319 | // 2b | ||||
14320 | unsigned lsb = countTrailingZeros(Mask); | ||||
14321 | Res = DAG.getNode(ISD::SRL, DL, VT, N00, | ||||
14322 | DAG.getConstant(lsb, DL, MVT::i32)); | ||||
14323 | Res = DAG.getNode(ARMISD::BFI, DL, VT, N1.getOperand(0), Res, | ||||
14324 | DAG.getConstant(Mask2, DL, MVT::i32)); | ||||
14325 | DCI.CombineTo(N, Res, false); | ||||
14326 | // Return value from the original node to inform the combiner than N is | ||||
14327 | // now dead. | ||||
14328 | return SDValue(N, 0); | ||||
14329 | } | ||||
14330 | } | ||||
14331 | |||||
14332 | if (DAG.MaskedValueIsZero(N1, MaskC->getAPIntValue()) && | ||||
14333 | N00.getOpcode() == ISD::SHL && isa<ConstantSDNode>(N00.getOperand(1)) && | ||||
14334 | ARM::isBitFieldInvertedMask(~Mask)) { | ||||
14335 | // Case (3): or (and (shl A, #shamt), mask), B => ARMbfi B, A, ~mask | ||||
14336 | // where lsb(mask) == #shamt and masked bits of B are known zero. | ||||
14337 | SDValue ShAmt = N00.getOperand(1); | ||||
14338 | unsigned ShAmtC = cast<ConstantSDNode>(ShAmt)->getZExtValue(); | ||||
14339 | unsigned LSB = countTrailingZeros(Mask); | ||||
14340 | if (ShAmtC != LSB) | ||||
14341 | return SDValue(); | ||||
14342 | |||||
14343 | Res = DAG.getNode(ARMISD::BFI, DL, VT, N1, N00.getOperand(0), | ||||
14344 | DAG.getConstant(~Mask, DL, MVT::i32)); | ||||
14345 | |||||
14346 | DCI.CombineTo(N, Res, false); | ||||
14347 | // Return value from the original node to inform the combiner than N is | ||||
14348 | // now dead. | ||||
14349 | return SDValue(N, 0); | ||||
14350 | } | ||||
14351 | |||||
14352 | return SDValue(); | ||||
14353 | } | ||||
14354 | |||||
14355 | static bool isValidMVECond(unsigned CC, bool IsFloat) { | ||||
14356 | switch (CC) { | ||||
14357 | case ARMCC::EQ: | ||||
14358 | case ARMCC::NE: | ||||
14359 | case ARMCC::LE: | ||||
14360 | case ARMCC::GT: | ||||
14361 | case ARMCC::GE: | ||||
14362 | case ARMCC::LT: | ||||
14363 | return true; | ||||
14364 | case ARMCC::HS: | ||||
14365 | case ARMCC::HI: | ||||
14366 | return !IsFloat; | ||||
14367 | default: | ||||
14368 | return false; | ||||
14369 | }; | ||||
14370 | } | ||||
14371 | |||||
14372 | static ARMCC::CondCodes getVCMPCondCode(SDValue N) { | ||||
14373 | if (N->getOpcode() == ARMISD::VCMP) | ||||
14374 | return (ARMCC::CondCodes)N->getConstantOperandVal(2); | ||||
14375 | else if (N->getOpcode() == ARMISD::VCMPZ) | ||||
14376 | return (ARMCC::CondCodes)N->getConstantOperandVal(1); | ||||
14377 | else | ||||
14378 | llvm_unreachable("Not a VCMP/VCMPZ!")::llvm::llvm_unreachable_internal("Not a VCMP/VCMPZ!", "llvm/lib/Target/ARM/ARMISelLowering.cpp" , 14378); | ||||
14379 | } | ||||
14380 | |||||
14381 | static bool CanInvertMVEVCMP(SDValue N) { | ||||
14382 | ARMCC::CondCodes CC = ARMCC::getOppositeCondition(getVCMPCondCode(N)); | ||||
14383 | return isValidMVECond(CC, N->getOperand(0).getValueType().isFloatingPoint()); | ||||
14384 | } | ||||
14385 | |||||
14386 | static SDValue PerformORCombine_i1(SDNode *N, SelectionDAG &DAG, | ||||
14387 | const ARMSubtarget *Subtarget) { | ||||
14388 | // Try to invert "or A, B" -> "and ~A, ~B", as the "and" is easier to chain | ||||
14389 | // together with predicates | ||||
14390 | EVT VT = N->getValueType(0); | ||||
14391 | SDLoc DL(N); | ||||
14392 | SDValue N0 = N->getOperand(0); | ||||
14393 | SDValue N1 = N->getOperand(1); | ||||
14394 | |||||
14395 | auto IsFreelyInvertable = [&](SDValue V) { | ||||
14396 | if (V->getOpcode() == ARMISD::VCMP || V->getOpcode() == ARMISD::VCMPZ) | ||||
14397 | return CanInvertMVEVCMP(V); | ||||
14398 | return false; | ||||
14399 | }; | ||||
14400 | |||||
14401 | // At least one operand must be freely invertable. | ||||
14402 | if (!(IsFreelyInvertable(N0) || IsFreelyInvertable(N1))) | ||||
14403 | return SDValue(); | ||||
14404 | |||||
14405 | SDValue NewN0 = DAG.getLogicalNOT(DL, N0, VT); | ||||
14406 | SDValue NewN1 = DAG.getLogicalNOT(DL, N1, VT); | ||||
14407 | SDValue And = DAG.getNode(ISD::AND, DL, VT, NewN0, NewN1); | ||||
14408 | return DAG.getLogicalNOT(DL, And, VT); | ||||
14409 | } | ||||
14410 | |||||
14411 | /// PerformORCombine - Target-specific dag combine xforms for ISD::OR | ||||
14412 | static SDValue PerformORCombine(SDNode *N, | ||||
14413 | TargetLowering::DAGCombinerInfo &DCI, | ||||
14414 | const ARMSubtarget *Subtarget) { | ||||
14415 | // Attempt to use immediate-form VORR | ||||
14416 | BuildVectorSDNode *BVN = dyn_cast<BuildVectorSDNode>(N->getOperand(1)); | ||||
14417 | SDLoc dl(N); | ||||
14418 | EVT VT = N->getValueType(0); | ||||
14419 | SelectionDAG &DAG = DCI.DAG; | ||||
14420 | |||||
14421 | if(!DAG.getTargetLoweringInfo().isTypeLegal(VT)) | ||||
14422 | return SDValue(); | ||||
14423 | |||||
14424 | if (Subtarget->hasMVEIntegerOps() && (VT == MVT::v2i1 || VT == MVT::v4i1 || | ||||
14425 | VT == MVT::v8i1 || VT == MVT::v16i1)) | ||||
14426 | return PerformORCombine_i1(N, DAG, Subtarget); | ||||
14427 | |||||
14428 | APInt SplatBits, SplatUndef; | ||||
14429 | unsigned SplatBitSize; | ||||
14430 | bool HasAnyUndefs; | ||||
14431 | if (BVN && (Subtarget->hasNEON() || Subtarget->hasMVEIntegerOps()) && | ||||
14432 | BVN->isConstantSplat(SplatBits, SplatUndef, SplatBitSize, HasAnyUndefs)) { | ||||
14433 | if (SplatBitSize == 8 || SplatBitSize == 16 || SplatBitSize == 32 || | ||||
14434 | SplatBitSize == 64) { | ||||
14435 | EVT VorrVT; | ||||
14436 | SDValue Val = | ||||
14437 | isVMOVModifiedImm(SplatBits.getZExtValue(), SplatUndef.getZExtValue(), | ||||
14438 | SplatBitSize, DAG, dl, VorrVT, VT, OtherModImm); | ||||
14439 | if (Val.getNode()) { | ||||
14440 | SDValue Input = | ||||
14441 | DAG.getNode(ISD::BITCAST, dl, VorrVT, N->getOperand(0)); | ||||
14442 | SDValue Vorr = DAG.getNode(ARMISD::VORRIMM, dl, VorrVT, Input, Val); | ||||
14443 | return DAG.getNode(ISD::BITCAST, dl, VT, Vorr); | ||||
14444 | } | ||||
14445 | } | ||||
14446 | } | ||||
14447 | |||||
14448 | if (!Subtarget->isThumb1Only()) { | ||||
14449 | // fold (or (select cc, 0, c), x) -> (select cc, x, (or, x, c)) | ||||
14450 | if (SDValue Result = combineSelectAndUseCommutative(N, false, DCI)) | ||||
14451 | return Result; | ||||
14452 | if (SDValue Result = PerformORCombineToSMULWBT(N, DCI, Subtarget)) | ||||
14453 | return Result; | ||||
14454 | } | ||||
14455 | |||||
14456 | SDValue N0 = N->getOperand(0); | ||||
14457 | SDValue N1 = N->getOperand(1); | ||||
14458 | |||||
14459 | // (or (and B, A), (and C, ~A)) => (VBSL A, B, C) when A is a constant. | ||||
14460 | if (Subtarget->hasNEON() && N1.getOpcode() == ISD::AND && VT.isVector() && | ||||
14461 | DAG.getTargetLoweringInfo().isTypeLegal(VT)) { | ||||
14462 | |||||
14463 | // The code below optimizes (or (and X, Y), Z). | ||||
14464 | // The AND operand needs to have a single user to make these optimizations | ||||
14465 | // profitable. | ||||
14466 | if (N0.getOpcode() != ISD::AND || !N0.hasOneUse()) | ||||
14467 | return SDValue(); | ||||
14468 | |||||
14469 | APInt SplatUndef; | ||||
14470 | unsigned SplatBitSize; | ||||
14471 | bool HasAnyUndefs; | ||||
14472 | |||||
14473 | APInt SplatBits0, SplatBits1; | ||||
14474 | BuildVectorSDNode *BVN0 = dyn_cast<BuildVectorSDNode>(N0->getOperand(1)); | ||||
14475 | BuildVectorSDNode *BVN1 = dyn_cast<BuildVectorSDNode>(N1->getOperand(1)); | ||||
14476 | // Ensure that the second operand of both ands are constants | ||||
14477 | if (BVN0 && BVN0->isConstantSplat(SplatBits0, SplatUndef, SplatBitSize, | ||||
14478 | HasAnyUndefs) && !HasAnyUndefs) { | ||||
14479 | if (BVN1 && BVN1->isConstantSplat(SplatBits1, SplatUndef, SplatBitSize, | ||||
14480 | HasAnyUndefs) && !HasAnyUndefs) { | ||||
14481 | // Ensure that the bit width of the constants are the same and that | ||||
14482 | // the splat arguments are logical inverses as per the pattern we | ||||
14483 | // are trying to simplify. | ||||
14484 | if (SplatBits0.getBitWidth() == SplatBits1.getBitWidth() && | ||||
14485 | SplatBits0 == ~SplatBits1) { | ||||
14486 | // Canonicalize the vector type to make instruction selection | ||||
14487 | // simpler. | ||||
14488 | EVT CanonicalVT = VT.is128BitVector() ? MVT::v4i32 : MVT::v2i32; | ||||
14489 | SDValue Result = DAG.getNode(ARMISD::VBSP, dl, CanonicalVT, | ||||
14490 | N0->getOperand(1), | ||||
14491 | N0->getOperand(0), | ||||
14492 | N1->getOperand(0)); | ||||
14493 | return DAG.getNode(ISD::BITCAST, dl, VT, Result); | ||||
14494 | } | ||||
14495 | } | ||||
14496 | } | ||||
14497 | } | ||||
14498 | |||||
14499 | // Try to use the ARM/Thumb2 BFI (bitfield insert) instruction when | ||||
14500 | // reasonable. | ||||
14501 | if (N0.getOpcode() == ISD::AND && N0.hasOneUse()) { | ||||
14502 | if (SDValue Res = PerformORCombineToBFI(N, DCI, Subtarget)) | ||||
14503 | return Res; | ||||
14504 | } | ||||
14505 | |||||
14506 | if (SDValue Result = PerformSHLSimplify(N, DCI, Subtarget)) | ||||
14507 | return Result; | ||||
14508 | |||||
14509 | return SDValue(); | ||||
14510 | } | ||||
14511 | |||||
14512 | static SDValue PerformXORCombine(SDNode *N, | ||||
14513 | TargetLowering::DAGCombinerInfo &DCI, | ||||
14514 | const ARMSubtarget *Subtarget) { | ||||
14515 | EVT VT = N->getValueType(0); | ||||
14516 | SelectionDAG &DAG = DCI.DAG; | ||||
14517 | |||||
14518 | if(!DAG.getTargetLoweringInfo().isTypeLegal(VT)) | ||||
14519 | return SDValue(); | ||||
14520 | |||||
14521 | if (!Subtarget->isThumb1Only()) { | ||||
14522 | // fold (xor (select cc, 0, c), x) -> (select cc, x, (xor, x, c)) | ||||
14523 | if (SDValue Result = combineSelectAndUseCommutative(N, false, DCI)) | ||||
14524 | return Result; | ||||
14525 | |||||
14526 | if (SDValue Result = PerformSHLSimplify(N, DCI, Subtarget)) | ||||
14527 | return Result; | ||||
14528 | } | ||||
14529 | |||||
14530 | if (Subtarget->hasMVEIntegerOps()) { | ||||
14531 | // fold (xor(vcmp/z, 1)) into a vcmp with the opposite condition. | ||||
14532 | SDValue N0 = N->getOperand(0); | ||||
14533 | SDValue N1 = N->getOperand(1); | ||||
14534 | const TargetLowering *TLI = Subtarget->getTargetLowering(); | ||||
14535 | if (TLI->isConstTrueVal(N1) && | ||||
14536 | (N0->getOpcode() == ARMISD::VCMP || N0->getOpcode() == ARMISD::VCMPZ)) { | ||||
14537 | if (CanInvertMVEVCMP(N0)) { | ||||
14538 | SDLoc DL(N0); | ||||
14539 | ARMCC::CondCodes CC = ARMCC::getOppositeCondition(getVCMPCondCode(N0)); | ||||
14540 | |||||
14541 | SmallVector<SDValue, 4> Ops; | ||||
14542 | Ops.push_back(N0->getOperand(0)); | ||||
14543 | if (N0->getOpcode() == ARMISD::VCMP) | ||||
14544 | Ops.push_back(N0->getOperand(1)); | ||||
14545 | Ops.push_back(DAG.getConstant(CC, DL, MVT::i32)); | ||||
14546 | return DAG.getNode(N0->getOpcode(), DL, N0->getValueType(0), Ops); | ||||
14547 | } | ||||
14548 | } | ||||
14549 | } | ||||
14550 | |||||
14551 | return SDValue(); | ||||
14552 | } | ||||
14553 | |||||
14554 | // ParseBFI - given a BFI instruction in N, extract the "from" value (Rn) and return it, | ||||
14555 | // and fill in FromMask and ToMask with (consecutive) bits in "from" to be extracted and | ||||
14556 | // their position in "to" (Rd). | ||||
14557 | static SDValue ParseBFI(SDNode *N, APInt &ToMask, APInt &FromMask) { | ||||
14558 | assert(N->getOpcode() == ARMISD::BFI)(static_cast <bool> (N->getOpcode() == ARMISD::BFI) ? void (0) : __assert_fail ("N->getOpcode() == ARMISD::BFI" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 14558, __extension__ __PRETTY_FUNCTION__)); | ||||
14559 | |||||
14560 | SDValue From = N->getOperand(1); | ||||
14561 | ToMask = ~cast<ConstantSDNode>(N->getOperand(2))->getAPIntValue(); | ||||
14562 | FromMask = APInt::getLowBitsSet(ToMask.getBitWidth(), ToMask.countPopulation()); | ||||
14563 | |||||
14564 | // If the Base came from a SHR #C, we can deduce that it is really testing bit | ||||
14565 | // #C in the base of the SHR. | ||||
14566 | if (From->getOpcode() == ISD::SRL && | ||||
14567 | isa<ConstantSDNode>(From->getOperand(1))) { | ||||
14568 | APInt Shift = cast<ConstantSDNode>(From->getOperand(1))->getAPIntValue(); | ||||
14569 | assert(Shift.getLimitedValue() < 32 && "Shift too large!")(static_cast <bool> (Shift.getLimitedValue() < 32 && "Shift too large!") ? void (0) : __assert_fail ("Shift.getLimitedValue() < 32 && \"Shift too large!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 14569, __extension__ __PRETTY_FUNCTION__)); | ||||
14570 | FromMask <<= Shift.getLimitedValue(31); | ||||
14571 | From = From->getOperand(0); | ||||
14572 | } | ||||
14573 | |||||
14574 | return From; | ||||
14575 | } | ||||
14576 | |||||
14577 | // If A and B contain one contiguous set of bits, does A | B == A . B? | ||||
14578 | // | ||||
14579 | // Neither A nor B must be zero. | ||||
14580 | static bool BitsProperlyConcatenate(const APInt &A, const APInt &B) { | ||||
14581 | unsigned LastActiveBitInA = A.countTrailingZeros(); | ||||
14582 | unsigned FirstActiveBitInB = B.getBitWidth() - B.countLeadingZeros() - 1; | ||||
14583 | return LastActiveBitInA - 1 == FirstActiveBitInB; | ||||
14584 | } | ||||
14585 | |||||
14586 | static SDValue FindBFIToCombineWith(SDNode *N) { | ||||
14587 | // We have a BFI in N. Find a BFI it can combine with, if one exists. | ||||
14588 | APInt ToMask, FromMask; | ||||
14589 | SDValue From = ParseBFI(N, ToMask, FromMask); | ||||
14590 | SDValue To = N->getOperand(0); | ||||
14591 | |||||
14592 | SDValue V = To; | ||||
14593 | if (V.getOpcode() != ARMISD::BFI) | ||||
14594 | return SDValue(); | ||||
14595 | |||||
14596 | APInt NewToMask, NewFromMask; | ||||
14597 | SDValue NewFrom = ParseBFI(V.getNode(), NewToMask, NewFromMask); | ||||
14598 | if (NewFrom != From) | ||||
14599 | return SDValue(); | ||||
14600 | |||||
14601 | // Do the written bits conflict with any we've seen so far? | ||||
14602 | if ((NewToMask & ToMask).getBoolValue()) | ||||
14603 | // Conflicting bits. | ||||
14604 | return SDValue(); | ||||
14605 | |||||
14606 | // Are the new bits contiguous when combined with the old bits? | ||||
14607 | if (BitsProperlyConcatenate(ToMask, NewToMask) && | ||||
14608 | BitsProperlyConcatenate(FromMask, NewFromMask)) | ||||
14609 | return V; | ||||
14610 | if (BitsProperlyConcatenate(NewToMask, ToMask) && | ||||
14611 | BitsProperlyConcatenate(NewFromMask, FromMask)) | ||||
14612 | return V; | ||||
14613 | |||||
14614 | return SDValue(); | ||||
14615 | } | ||||
14616 | |||||
14617 | static SDValue PerformBFICombine(SDNode *N, SelectionDAG &DAG) { | ||||
14618 | SDValue N0 = N->getOperand(0); | ||||
14619 | SDValue N1 = N->getOperand(1); | ||||
14620 | |||||
14621 | if (N1.getOpcode() == ISD::AND) { | ||||
14622 | // (bfi A, (and B, Mask1), Mask2) -> (bfi A, B, Mask2) iff | ||||
14623 | // the bits being cleared by the AND are not demanded by the BFI. | ||||
14624 | ConstantSDNode *N11C = dyn_cast<ConstantSDNode>(N1.getOperand(1)); | ||||
14625 | if (!N11C) | ||||
14626 | return SDValue(); | ||||
14627 | unsigned InvMask = cast<ConstantSDNode>(N->getOperand(2))->getZExtValue(); | ||||
14628 | unsigned LSB = countTrailingZeros(~InvMask); | ||||
14629 | unsigned Width = (32 - countLeadingZeros(~InvMask)) - LSB; | ||||
14630 | assert(Width <(static_cast <bool> (Width < static_cast<unsigned >(std::numeric_limits<unsigned>::digits) && "undefined behavior" ) ? void (0) : __assert_fail ("Width < static_cast<unsigned>(std::numeric_limits<unsigned>::digits) && \"undefined behavior\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 14632, __extension__ __PRETTY_FUNCTION__)) | ||||
14631 | static_cast<unsigned>(std::numeric_limits<unsigned>::digits) &&(static_cast <bool> (Width < static_cast<unsigned >(std::numeric_limits<unsigned>::digits) && "undefined behavior" ) ? void (0) : __assert_fail ("Width < static_cast<unsigned>(std::numeric_limits<unsigned>::digits) && \"undefined behavior\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 14632, __extension__ __PRETTY_FUNCTION__)) | ||||
14632 | "undefined behavior")(static_cast <bool> (Width < static_cast<unsigned >(std::numeric_limits<unsigned>::digits) && "undefined behavior" ) ? void (0) : __assert_fail ("Width < static_cast<unsigned>(std::numeric_limits<unsigned>::digits) && \"undefined behavior\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 14632, __extension__ __PRETTY_FUNCTION__)); | ||||
14633 | unsigned Mask = (1u << Width) - 1; | ||||
14634 | unsigned Mask2 = N11C->getZExtValue(); | ||||
14635 | if ((Mask & (~Mask2)) == 0) | ||||
14636 | return DAG.getNode(ARMISD::BFI, SDLoc(N), N->getValueType(0), | ||||
14637 | N->getOperand(0), N1.getOperand(0), N->getOperand(2)); | ||||
14638 | return SDValue(); | ||||
14639 | } | ||||
14640 | |||||
14641 | // Look for another BFI to combine with. | ||||
14642 | if (SDValue CombineBFI = FindBFIToCombineWith(N)) { | ||||
14643 | // We've found a BFI. | ||||
14644 | APInt ToMask1, FromMask1; | ||||
14645 | SDValue From1 = ParseBFI(N, ToMask1, FromMask1); | ||||
14646 | |||||
14647 | APInt ToMask2, FromMask2; | ||||
14648 | SDValue From2 = ParseBFI(CombineBFI.getNode(), ToMask2, FromMask2); | ||||
14649 | assert(From1 == From2)(static_cast <bool> (From1 == From2) ? void (0) : __assert_fail ("From1 == From2", "llvm/lib/Target/ARM/ARMISelLowering.cpp" , 14649, __extension__ __PRETTY_FUNCTION__)); | ||||
14650 | (void)From2; | ||||
14651 | |||||
14652 | // Create a new BFI, combining the two together. | ||||
14653 | APInt NewFromMask = FromMask1 | FromMask2; | ||||
14654 | APInt NewToMask = ToMask1 | ToMask2; | ||||
14655 | |||||
14656 | EVT VT = N->getValueType(0); | ||||
14657 | SDLoc dl(N); | ||||
14658 | |||||
14659 | if (NewFromMask[0] == 0) | ||||
14660 | From1 = DAG.getNode( | ||||
14661 | ISD::SRL, dl, VT, From1, | ||||
14662 | DAG.getConstant(NewFromMask.countTrailingZeros(), dl, VT)); | ||||
14663 | return DAG.getNode(ARMISD::BFI, dl, VT, CombineBFI.getOperand(0), From1, | ||||
14664 | DAG.getConstant(~NewToMask, dl, VT)); | ||||
14665 | } | ||||
14666 | |||||
14667 | // Reassociate BFI(BFI (A, B, M1), C, M2) to BFI(BFI (A, C, M2), B, M1) so | ||||
14668 | // that lower bit insertions are performed first, providing that M1 and M2 | ||||
14669 | // do no overlap. This can allow multiple BFI instructions to be combined | ||||
14670 | // together by the other folds above. | ||||
14671 | if (N->getOperand(0).getOpcode() == ARMISD::BFI) { | ||||
14672 | APInt ToMask1 = ~N->getConstantOperandAPInt(2); | ||||
14673 | APInt ToMask2 = ~N0.getConstantOperandAPInt(2); | ||||
14674 | |||||
14675 | if (!N0.hasOneUse() || (ToMask1 & ToMask2) != 0 || | ||||
14676 | ToMask1.countLeadingZeros() < ToMask2.countLeadingZeros()) | ||||
14677 | return SDValue(); | ||||
14678 | |||||
14679 | EVT VT = N->getValueType(0); | ||||
14680 | SDLoc dl(N); | ||||
14681 | SDValue BFI1 = DAG.getNode(ARMISD::BFI, dl, VT, N0.getOperand(0), | ||||
14682 | N->getOperand(1), N->getOperand(2)); | ||||
14683 | return DAG.getNode(ARMISD::BFI, dl, VT, BFI1, N0.getOperand(1), | ||||
14684 | N0.getOperand(2)); | ||||
14685 | } | ||||
14686 | |||||
14687 | return SDValue(); | ||||
14688 | } | ||||
14689 | |||||
14690 | // Check that N is CMPZ(CSINC(0, 0, CC, X)), | ||||
14691 | // or CMPZ(CMOV(1, 0, CC, $cpsr, X)) | ||||
14692 | // return X if valid. | ||||
14693 | static SDValue IsCMPZCSINC(SDNode *Cmp, ARMCC::CondCodes &CC) { | ||||
14694 | if (Cmp->getOpcode() != ARMISD::CMPZ || !isNullConstant(Cmp->getOperand(1))) | ||||
14695 | return SDValue(); | ||||
14696 | SDValue CSInc = Cmp->getOperand(0); | ||||
14697 | |||||
14698 | // Ignore any `And 1` nodes that may not yet have been removed. We are | ||||
14699 | // looking for a value that produces 1/0, so these have no effect on the | ||||
14700 | // code. | ||||
14701 | while (CSInc.getOpcode() == ISD::AND && | ||||
14702 | isa<ConstantSDNode>(CSInc.getOperand(1)) && | ||||
14703 | CSInc.getConstantOperandVal(1) == 1 && CSInc->hasOneUse()) | ||||
14704 | CSInc = CSInc.getOperand(0); | ||||
14705 | |||||
14706 | if (CSInc.getOpcode() == ARMISD::CSINC && | ||||
14707 | isNullConstant(CSInc.getOperand(0)) && | ||||
14708 | isNullConstant(CSInc.getOperand(1)) && CSInc->hasOneUse()) { | ||||
14709 | CC = (ARMCC::CondCodes)CSInc.getConstantOperandVal(2); | ||||
14710 | return CSInc.getOperand(3); | ||||
14711 | } | ||||
14712 | if (CSInc.getOpcode() == ARMISD::CMOV && isOneConstant(CSInc.getOperand(0)) && | ||||
14713 | isNullConstant(CSInc.getOperand(1)) && CSInc->hasOneUse()) { | ||||
14714 | CC = (ARMCC::CondCodes)CSInc.getConstantOperandVal(2); | ||||
14715 | return CSInc.getOperand(4); | ||||
14716 | } | ||||
14717 | if (CSInc.getOpcode() == ARMISD::CMOV && isOneConstant(CSInc.getOperand(1)) && | ||||
14718 | isNullConstant(CSInc.getOperand(0)) && CSInc->hasOneUse()) { | ||||
14719 | CC = ARMCC::getOppositeCondition( | ||||
14720 | (ARMCC::CondCodes)CSInc.getConstantOperandVal(2)); | ||||
14721 | return CSInc.getOperand(4); | ||||
14722 | } | ||||
14723 | return SDValue(); | ||||
14724 | } | ||||
14725 | |||||
14726 | static SDValue PerformCMPZCombine(SDNode *N, SelectionDAG &DAG) { | ||||
14727 | // Given CMPZ(CSINC(C, 0, 0, EQ), 0), we can just use C directly. As in | ||||
14728 | // t92: glue = ARMISD::CMPZ t74, 0 | ||||
14729 | // t93: i32 = ARMISD::CSINC 0, 0, 1, t92 | ||||
14730 | // t96: glue = ARMISD::CMPZ t93, 0 | ||||
14731 | // t114: i32 = ARMISD::CSINV 0, 0, 0, t96 | ||||
14732 | ARMCC::CondCodes Cond; | ||||
14733 | if (SDValue C = IsCMPZCSINC(N, Cond)) | ||||
14734 | if (Cond == ARMCC::EQ) | ||||
14735 | return C; | ||||
14736 | return SDValue(); | ||||
14737 | } | ||||
14738 | |||||
14739 | static SDValue PerformCSETCombine(SDNode *N, SelectionDAG &DAG) { | ||||
14740 | // Fold away an unneccessary CMPZ/CSINC | ||||
14741 | // CSXYZ A, B, C1 (CMPZ (CSINC 0, 0, C2, D), 0) -> | ||||
14742 | // if C1==EQ -> CSXYZ A, B, C2, D | ||||
14743 | // if C1==NE -> CSXYZ A, B, NOT(C2), D | ||||
14744 | ARMCC::CondCodes Cond; | ||||
14745 | if (SDValue C = IsCMPZCSINC(N->getOperand(3).getNode(), Cond)) { | ||||
14746 | if (N->getConstantOperandVal(2) == ARMCC::EQ) | ||||
14747 | return DAG.getNode(N->getOpcode(), SDLoc(N), MVT::i32, N->getOperand(0), | ||||
14748 | N->getOperand(1), | ||||
14749 | DAG.getConstant(Cond, SDLoc(N), MVT::i32), C); | ||||
14750 | if (N->getConstantOperandVal(2) == ARMCC::NE) | ||||
14751 | return DAG.getNode( | ||||
14752 | N->getOpcode(), SDLoc(N), MVT::i32, N->getOperand(0), | ||||
14753 | N->getOperand(1), | ||||
14754 | DAG.getConstant(ARMCC::getOppositeCondition(Cond), SDLoc(N), MVT::i32), C); | ||||
14755 | } | ||||
14756 | return SDValue(); | ||||
14757 | } | ||||
14758 | |||||
14759 | /// PerformVMOVRRDCombine - Target-specific dag combine xforms for | ||||
14760 | /// ARMISD::VMOVRRD. | ||||
14761 | static SDValue PerformVMOVRRDCombine(SDNode *N, | ||||
14762 | TargetLowering::DAGCombinerInfo &DCI, | ||||
14763 | const ARMSubtarget *Subtarget) { | ||||
14764 | // vmovrrd(vmovdrr x, y) -> x,y | ||||
14765 | SDValue InDouble = N->getOperand(0); | ||||
14766 | if (InDouble.getOpcode() == ARMISD::VMOVDRR && Subtarget->hasFP64()) | ||||
14767 | return DCI.CombineTo(N, InDouble.getOperand(0), InDouble.getOperand(1)); | ||||
14768 | |||||
14769 | // vmovrrd(load f64) -> (load i32), (load i32) | ||||
14770 | SDNode *InNode = InDouble.getNode(); | ||||
14771 | if (ISD::isNormalLoad(InNode) && InNode->hasOneUse() && | ||||
14772 | InNode->getValueType(0) == MVT::f64 && | ||||
14773 | InNode->getOperand(1).getOpcode() == ISD::FrameIndex && | ||||
14774 | !cast<LoadSDNode>(InNode)->isVolatile()) { | ||||
14775 | // TODO: Should this be done for non-FrameIndex operands? | ||||
14776 | LoadSDNode *LD = cast<LoadSDNode>(InNode); | ||||
14777 | |||||
14778 | SelectionDAG &DAG = DCI.DAG; | ||||
14779 | SDLoc DL(LD); | ||||
14780 | SDValue BasePtr = LD->getBasePtr(); | ||||
14781 | SDValue NewLD1 = | ||||
14782 | DAG.getLoad(MVT::i32, DL, LD->getChain(), BasePtr, LD->getPointerInfo(), | ||||
14783 | LD->getAlignment(), LD->getMemOperand()->getFlags()); | ||||
14784 | |||||
14785 | SDValue OffsetPtr = DAG.getNode(ISD::ADD, DL, MVT::i32, BasePtr, | ||||
14786 | DAG.getConstant(4, DL, MVT::i32)); | ||||
14787 | |||||
14788 | SDValue NewLD2 = DAG.getLoad(MVT::i32, DL, LD->getChain(), OffsetPtr, | ||||
14789 | LD->getPointerInfo().getWithOffset(4), | ||||
14790 | std::min(4U, LD->getAlignment()), | ||||
14791 | LD->getMemOperand()->getFlags()); | ||||
14792 | |||||
14793 | DAG.ReplaceAllUsesOfValueWith(SDValue(LD, 1), NewLD2.getValue(1)); | ||||
14794 | if (DCI.DAG.getDataLayout().isBigEndian()) | ||||
14795 | std::swap (NewLD1, NewLD2); | ||||
14796 | SDValue Result = DCI.CombineTo(N, NewLD1, NewLD2); | ||||
14797 | return Result; | ||||
14798 | } | ||||
14799 | |||||
14800 | // VMOVRRD(extract(..(build_vector(a, b, c, d)))) -> a,b or c,d | ||||
14801 | // VMOVRRD(extract(insert_vector(insert_vector(.., a, l1), b, l2))) -> a,b | ||||
14802 | if (InDouble.getOpcode() == ISD::EXTRACT_VECTOR_ELT && | ||||
14803 | isa<ConstantSDNode>(InDouble.getOperand(1))) { | ||||
14804 | SDValue BV = InDouble.getOperand(0); | ||||
14805 | // Look up through any nop bitcasts and vector_reg_casts. bitcasts may | ||||
14806 | // change lane order under big endian. | ||||
14807 | bool BVSwap = BV.getOpcode() == ISD::BITCAST; | ||||
14808 | while ( | ||||
14809 | (BV.getOpcode() == ISD::BITCAST || | ||||
14810 | BV.getOpcode() == ARMISD::VECTOR_REG_CAST) && | ||||
14811 | (BV.getValueType() == MVT::v2f64 || BV.getValueType() == MVT::v2i64)) { | ||||
14812 | BVSwap = BV.getOpcode() == ISD::BITCAST; | ||||
14813 | BV = BV.getOperand(0); | ||||
14814 | } | ||||
14815 | if (BV.getValueType() != MVT::v4i32) | ||||
14816 | return SDValue(); | ||||
14817 | |||||
14818 | // Handle buildvectors, pulling out the correct lane depending on | ||||
14819 | // endianness. | ||||
14820 | unsigned Offset = InDouble.getConstantOperandVal(1) == 1 ? 2 : 0; | ||||
14821 | if (BV.getOpcode() == ISD::BUILD_VECTOR) { | ||||
14822 | SDValue Op0 = BV.getOperand(Offset); | ||||
14823 | SDValue Op1 = BV.getOperand(Offset + 1); | ||||
14824 | if (!Subtarget->isLittle() && BVSwap) | ||||
14825 | std::swap(Op0, Op1); | ||||
14826 | |||||
14827 | return DCI.DAG.getMergeValues({Op0, Op1}, SDLoc(N)); | ||||
14828 | } | ||||
14829 | |||||
14830 | // A chain of insert_vectors, grabbing the correct value of the chain of | ||||
14831 | // inserts. | ||||
14832 | SDValue Op0, Op1; | ||||
14833 | while (BV.getOpcode() == ISD::INSERT_VECTOR_ELT) { | ||||
14834 | if (isa<ConstantSDNode>(BV.getOperand(2))) { | ||||
14835 | if (BV.getConstantOperandVal(2) == Offset) | ||||
14836 | Op0 = BV.getOperand(1); | ||||
14837 | if (BV.getConstantOperandVal(2) == Offset + 1) | ||||
14838 | Op1 = BV.getOperand(1); | ||||
14839 | } | ||||
14840 | BV = BV.getOperand(0); | ||||
14841 | } | ||||
14842 | if (!Subtarget->isLittle() && BVSwap) | ||||
14843 | std::swap(Op0, Op1); | ||||
14844 | if (Op0 && Op1) | ||||
14845 | return DCI.DAG.getMergeValues({Op0, Op1}, SDLoc(N)); | ||||
14846 | } | ||||
14847 | |||||
14848 | return SDValue(); | ||||
14849 | } | ||||
14850 | |||||
14851 | /// PerformVMOVDRRCombine - Target-specific dag combine xforms for | ||||
14852 | /// ARMISD::VMOVDRR. This is also used for BUILD_VECTORs with 2 operands. | ||||
14853 | static SDValue PerformVMOVDRRCombine(SDNode *N, SelectionDAG &DAG) { | ||||
14854 | // N=vmovrrd(X); vmovdrr(N:0, N:1) -> bit_convert(X) | ||||
14855 | SDValue Op0 = N->getOperand(0); | ||||
14856 | SDValue Op1 = N->getOperand(1); | ||||
14857 | if (Op0.getOpcode() == ISD::BITCAST) | ||||
14858 | Op0 = Op0.getOperand(0); | ||||
14859 | if (Op1.getOpcode() == ISD::BITCAST) | ||||
14860 | Op1 = Op1.getOperand(0); | ||||
14861 | if (Op0.getOpcode() == ARMISD::VMOVRRD && | ||||
14862 | Op0.getNode() == Op1.getNode() && | ||||
14863 | Op0.getResNo() == 0 && Op1.getResNo() == 1) | ||||
14864 | return DAG.getNode(ISD::BITCAST, SDLoc(N), | ||||
14865 | N->getValueType(0), Op0.getOperand(0)); | ||||
14866 | return SDValue(); | ||||
14867 | } | ||||
14868 | |||||
14869 | static SDValue PerformVMOVhrCombine(SDNode *N, | ||||
14870 | TargetLowering::DAGCombinerInfo &DCI) { | ||||
14871 | SDValue Op0 = N->getOperand(0); | ||||
14872 | |||||
14873 | // VMOVhr (VMOVrh (X)) -> X | ||||
14874 | if (Op0->getOpcode() == ARMISD::VMOVrh) | ||||
14875 | return Op0->getOperand(0); | ||||
14876 | |||||
14877 | // FullFP16: half values are passed in S-registers, and we don't | ||||
14878 | // need any of the bitcast and moves: | ||||
14879 | // | ||||
14880 | // t2: f32,ch = CopyFromReg t0, Register:f32 %0 | ||||
14881 | // t5: i32 = bitcast t2 | ||||
14882 | // t18: f16 = ARMISD::VMOVhr t5 | ||||
14883 | if (Op0->getOpcode() == ISD::BITCAST) { | ||||
14884 | SDValue Copy = Op0->getOperand(0); | ||||
14885 | if (Copy.getValueType() == MVT::f32 && | ||||
14886 | Copy->getOpcode() == ISD::CopyFromReg) { | ||||
14887 | SDValue Ops[] = {Copy->getOperand(0), Copy->getOperand(1)}; | ||||
14888 | SDValue NewCopy = | ||||
14889 | DCI.DAG.getNode(ISD::CopyFromReg, SDLoc(N), N->getValueType(0), Ops); | ||||
14890 | return NewCopy; | ||||
14891 | } | ||||
14892 | } | ||||
14893 | |||||
14894 | // fold (VMOVhr (load x)) -> (load (f16*)x) | ||||
14895 | if (LoadSDNode *LN0 = dyn_cast<LoadSDNode>(Op0)) { | ||||
14896 | if (LN0->hasOneUse() && LN0->isUnindexed() && | ||||
14897 | LN0->getMemoryVT() == MVT::i16) { | ||||
14898 | SDValue Load = | ||||
14899 | DCI.DAG.getLoad(N->getValueType(0), SDLoc(N), LN0->getChain(), | ||||
14900 | LN0->getBasePtr(), LN0->getMemOperand()); | ||||
14901 | DCI.DAG.ReplaceAllUsesOfValueWith(SDValue(N, 0), Load.getValue(0)); | ||||
14902 | DCI.DAG.ReplaceAllUsesOfValueWith(Op0.getValue(1), Load.getValue(1)); | ||||
14903 | return Load; | ||||
14904 | } | ||||
14905 | } | ||||
14906 | |||||
14907 | // Only the bottom 16 bits of the source register are used. | ||||
14908 | APInt DemandedMask = APInt::getLowBitsSet(32, 16); | ||||
14909 | const TargetLowering &TLI = DCI.DAG.getTargetLoweringInfo(); | ||||
14910 | if (TLI.SimplifyDemandedBits(Op0, DemandedMask, DCI)) | ||||
14911 | return SDValue(N, 0); | ||||
14912 | |||||
14913 | return SDValue(); | ||||
14914 | } | ||||
14915 | |||||
14916 | static SDValue PerformVMOVrhCombine(SDNode *N, SelectionDAG &DAG) { | ||||
14917 | SDValue N0 = N->getOperand(0); | ||||
14918 | EVT VT = N->getValueType(0); | ||||
14919 | |||||
14920 | // fold (VMOVrh (fpconst x)) -> const x | ||||
14921 | if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N0)) { | ||||
14922 | APFloat V = C->getValueAPF(); | ||||
14923 | return DAG.getConstant(V.bitcastToAPInt().getZExtValue(), SDLoc(N), VT); | ||||
14924 | } | ||||
14925 | |||||
14926 | // fold (VMOVrh (load x)) -> (zextload (i16*)x) | ||||
14927 | if (ISD::isNormalLoad(N0.getNode()) && N0.hasOneUse()) { | ||||
14928 | LoadSDNode *LN0 = cast<LoadSDNode>(N0); | ||||
14929 | |||||
14930 | SDValue Load = | ||||
14931 | DAG.getExtLoad(ISD::ZEXTLOAD, SDLoc(N), VT, LN0->getChain(), | ||||
14932 | LN0->getBasePtr(), MVT::i16, LN0->getMemOperand()); | ||||
14933 | DAG.ReplaceAllUsesOfValueWith(SDValue(N, 0), Load.getValue(0)); | ||||
14934 | DAG.ReplaceAllUsesOfValueWith(N0.getValue(1), Load.getValue(1)); | ||||
14935 | return Load; | ||||
14936 | } | ||||
14937 | |||||
14938 | // Fold VMOVrh(extract(x, n)) -> vgetlaneu(x, n) | ||||
14939 | if (N0->getOpcode() == ISD::EXTRACT_VECTOR_ELT && | ||||
14940 | isa<ConstantSDNode>(N0->getOperand(1))) | ||||
14941 | return DAG.getNode(ARMISD::VGETLANEu, SDLoc(N), VT, N0->getOperand(0), | ||||
14942 | N0->getOperand(1)); | ||||
14943 | |||||
14944 | return SDValue(); | ||||
14945 | } | ||||
14946 | |||||
14947 | /// hasNormalLoadOperand - Check if any of the operands of a BUILD_VECTOR node | ||||
14948 | /// are normal, non-volatile loads. If so, it is profitable to bitcast an | ||||
14949 | /// i64 vector to have f64 elements, since the value can then be loaded | ||||
14950 | /// directly into a VFP register. | ||||
14951 | static bool hasNormalLoadOperand(SDNode *N) { | ||||
14952 | unsigned NumElts = N->getValueType(0).getVectorNumElements(); | ||||
14953 | for (unsigned i = 0; i < NumElts; ++i) { | ||||
14954 | SDNode *Elt = N->getOperand(i).getNode(); | ||||
14955 | if (ISD::isNormalLoad(Elt) && !cast<LoadSDNode>(Elt)->isVolatile()) | ||||
14956 | return true; | ||||
14957 | } | ||||
14958 | return false; | ||||
14959 | } | ||||
14960 | |||||
14961 | /// PerformBUILD_VECTORCombine - Target-specific dag combine xforms for | ||||
14962 | /// ISD::BUILD_VECTOR. | ||||
14963 | static SDValue PerformBUILD_VECTORCombine(SDNode *N, | ||||
14964 | TargetLowering::DAGCombinerInfo &DCI, | ||||
14965 | const ARMSubtarget *Subtarget) { | ||||
14966 | // build_vector(N=ARMISD::VMOVRRD(X), N:1) -> bit_convert(X): | ||||
14967 | // VMOVRRD is introduced when legalizing i64 types. It forces the i64 value | ||||
14968 | // into a pair of GPRs, which is fine when the value is used as a scalar, | ||||
14969 | // but if the i64 value is converted to a vector, we need to undo the VMOVRRD. | ||||
14970 | SelectionDAG &DAG = DCI.DAG; | ||||
14971 | if (N->getNumOperands() == 2) | ||||
14972 | if (SDValue RV = PerformVMOVDRRCombine(N, DAG)) | ||||
14973 | return RV; | ||||
14974 | |||||
14975 | // Load i64 elements as f64 values so that type legalization does not split | ||||
14976 | // them up into i32 values. | ||||
14977 | EVT VT = N->getValueType(0); | ||||
14978 | if (VT.getVectorElementType() != MVT::i64 || !hasNormalLoadOperand(N)) | ||||
14979 | return SDValue(); | ||||
14980 | SDLoc dl(N); | ||||
14981 | SmallVector<SDValue, 8> Ops; | ||||
14982 | unsigned NumElts = VT.getVectorNumElements(); | ||||
14983 | for (unsigned i = 0; i < NumElts; ++i) { | ||||
14984 | SDValue V = DAG.getNode(ISD::BITCAST, dl, MVT::f64, N->getOperand(i)); | ||||
14985 | Ops.push_back(V); | ||||
14986 | // Make the DAGCombiner fold the bitcast. | ||||
14987 | DCI.AddToWorklist(V.getNode()); | ||||
14988 | } | ||||
14989 | EVT FloatVT = EVT::getVectorVT(*DAG.getContext(), MVT::f64, NumElts); | ||||
14990 | SDValue BV = DAG.getBuildVector(FloatVT, dl, Ops); | ||||
14991 | return DAG.getNode(ISD::BITCAST, dl, VT, BV); | ||||
14992 | } | ||||
14993 | |||||
14994 | /// Target-specific dag combine xforms for ARMISD::BUILD_VECTOR. | ||||
14995 | static SDValue | ||||
14996 | PerformARMBUILD_VECTORCombine(SDNode *N, TargetLowering::DAGCombinerInfo &DCI) { | ||||
14997 | // ARMISD::BUILD_VECTOR is introduced when legalizing ISD::BUILD_VECTOR. | ||||
14998 | // At that time, we may have inserted bitcasts from integer to float. | ||||
14999 | // If these bitcasts have survived DAGCombine, change the lowering of this | ||||
15000 | // BUILD_VECTOR in something more vector friendly, i.e., that does not | ||||
15001 | // force to use floating point types. | ||||
15002 | |||||
15003 | // Make sure we can change the type of the vector. | ||||
15004 | // This is possible iff: | ||||
15005 | // 1. The vector is only used in a bitcast to a integer type. I.e., | ||||
15006 | // 1.1. Vector is used only once. | ||||
15007 | // 1.2. Use is a bit convert to an integer type. | ||||
15008 | // 2. The size of its operands are 32-bits (64-bits are not legal). | ||||
15009 | EVT VT = N->getValueType(0); | ||||
15010 | EVT EltVT = VT.getVectorElementType(); | ||||
15011 | |||||
15012 | // Check 1.1. and 2. | ||||
15013 | if (EltVT.getSizeInBits() != 32 || !N->hasOneUse()) | ||||
15014 | return SDValue(); | ||||
15015 | |||||
15016 | // By construction, the input type must be float. | ||||
15017 | assert(EltVT == MVT::f32 && "Unexpected type!")(static_cast <bool> (EltVT == MVT::f32 && "Unexpected type!" ) ? void (0) : __assert_fail ("EltVT == MVT::f32 && \"Unexpected type!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 15017, __extension__ __PRETTY_FUNCTION__)); | ||||
15018 | |||||
15019 | // Check 1.2. | ||||
15020 | SDNode *Use = *N->use_begin(); | ||||
15021 | if (Use->getOpcode() != ISD::BITCAST || | ||||
15022 | Use->getValueType(0).isFloatingPoint()) | ||||
15023 | return SDValue(); | ||||
15024 | |||||
15025 | // Check profitability. | ||||
15026 | // Model is, if more than half of the relevant operands are bitcast from | ||||
15027 | // i32, turn the build_vector into a sequence of insert_vector_elt. | ||||
15028 | // Relevant operands are everything that is not statically | ||||
15029 | // (i.e., at compile time) bitcasted. | ||||
15030 | unsigned NumOfBitCastedElts = 0; | ||||
15031 | unsigned NumElts = VT.getVectorNumElements(); | ||||
15032 | unsigned NumOfRelevantElts = NumElts; | ||||
15033 | for (unsigned Idx = 0; Idx < NumElts; ++Idx) { | ||||
15034 | SDValue Elt = N->getOperand(Idx); | ||||
15035 | if (Elt->getOpcode() == ISD::BITCAST) { | ||||
15036 | // Assume only bit cast to i32 will go away. | ||||
15037 | if (Elt->getOperand(0).getValueType() == MVT::i32) | ||||
15038 | ++NumOfBitCastedElts; | ||||
15039 | } else if (Elt.isUndef() || isa<ConstantSDNode>(Elt)) | ||||
15040 | // Constants are statically casted, thus do not count them as | ||||
15041 | // relevant operands. | ||||
15042 | --NumOfRelevantElts; | ||||
15043 | } | ||||
15044 | |||||
15045 | // Check if more than half of the elements require a non-free bitcast. | ||||
15046 | if (NumOfBitCastedElts <= NumOfRelevantElts / 2) | ||||
15047 | return SDValue(); | ||||
15048 | |||||
15049 | SelectionDAG &DAG = DCI.DAG; | ||||
15050 | // Create the new vector type. | ||||
15051 | EVT VecVT = EVT::getVectorVT(*DAG.getContext(), MVT::i32, NumElts); | ||||
15052 | // Check if the type is legal. | ||||
15053 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | ||||
15054 | if (!TLI.isTypeLegal(VecVT)) | ||||
15055 | return SDValue(); | ||||
15056 | |||||
15057 | // Combine: | ||||
15058 | // ARMISD::BUILD_VECTOR E1, E2, ..., EN. | ||||
15059 | // => BITCAST INSERT_VECTOR_ELT | ||||
15060 | // (INSERT_VECTOR_ELT (...), (BITCAST EN-1), N-1), | ||||
15061 | // (BITCAST EN), N. | ||||
15062 | SDValue Vec = DAG.getUNDEF(VecVT); | ||||
15063 | SDLoc dl(N); | ||||
15064 | for (unsigned Idx = 0 ; Idx < NumElts; ++Idx) { | ||||
15065 | SDValue V = N->getOperand(Idx); | ||||
15066 | if (V.isUndef()) | ||||
15067 | continue; | ||||
15068 | if (V.getOpcode() == ISD::BITCAST && | ||||
15069 | V->getOperand(0).getValueType() == MVT::i32) | ||||
15070 | // Fold obvious case. | ||||
15071 | V = V.getOperand(0); | ||||
15072 | else { | ||||
15073 | V = DAG.getNode(ISD::BITCAST, SDLoc(V), MVT::i32, V); | ||||
15074 | // Make the DAGCombiner fold the bitcasts. | ||||
15075 | DCI.AddToWorklist(V.getNode()); | ||||
15076 | } | ||||
15077 | SDValue LaneIdx = DAG.getConstant(Idx, dl, MVT::i32); | ||||
15078 | Vec = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VecVT, Vec, V, LaneIdx); | ||||
15079 | } | ||||
15080 | Vec = DAG.getNode(ISD::BITCAST, dl, VT, Vec); | ||||
15081 | // Make the DAGCombiner fold the bitcasts. | ||||
15082 | DCI.AddToWorklist(Vec.getNode()); | ||||
15083 | return Vec; | ||||
15084 | } | ||||
15085 | |||||
15086 | static SDValue | ||||
15087 | PerformPREDICATE_CASTCombine(SDNode *N, TargetLowering::DAGCombinerInfo &DCI) { | ||||
15088 | EVT VT = N->getValueType(0); | ||||
15089 | SDValue Op = N->getOperand(0); | ||||
15090 | SDLoc dl(N); | ||||
15091 | |||||
15092 | // PREDICATE_CAST(PREDICATE_CAST(x)) == PREDICATE_CAST(x) | ||||
15093 | if (Op->getOpcode() == ARMISD::PREDICATE_CAST) { | ||||
15094 | // If the valuetypes are the same, we can remove the cast entirely. | ||||
15095 | if (Op->getOperand(0).getValueType() == VT) | ||||
15096 | return Op->getOperand(0); | ||||
15097 | return DCI.DAG.getNode(ARMISD::PREDICATE_CAST, dl, VT, Op->getOperand(0)); | ||||
15098 | } | ||||
15099 | |||||
15100 | // Turn pred_cast(xor x, -1) into xor(pred_cast x, -1), in order to produce | ||||
15101 | // more VPNOT which might get folded as else predicates. | ||||
15102 | if (Op.getValueType() == MVT::i32 && isBitwiseNot(Op)) { | ||||
15103 | SDValue X = | ||||
15104 | DCI.DAG.getNode(ARMISD::PREDICATE_CAST, dl, VT, Op->getOperand(0)); | ||||
15105 | SDValue C = DCI.DAG.getNode(ARMISD::PREDICATE_CAST, dl, VT, | ||||
15106 | DCI.DAG.getConstant(65535, dl, MVT::i32)); | ||||
15107 | return DCI.DAG.getNode(ISD::XOR, dl, VT, X, C); | ||||
15108 | } | ||||
15109 | |||||
15110 | // Only the bottom 16 bits of the source register are used. | ||||
15111 | if (Op.getValueType() == MVT::i32) { | ||||
15112 | APInt DemandedMask = APInt::getLowBitsSet(32, 16); | ||||
15113 | const TargetLowering &TLI = DCI.DAG.getTargetLoweringInfo(); | ||||
15114 | if (TLI.SimplifyDemandedBits(Op, DemandedMask, DCI)) | ||||
15115 | return SDValue(N, 0); | ||||
15116 | } | ||||
15117 | return SDValue(); | ||||
15118 | } | ||||
15119 | |||||
15120 | static SDValue PerformVECTOR_REG_CASTCombine(SDNode *N, SelectionDAG &DAG, | ||||
15121 | const ARMSubtarget *ST) { | ||||
15122 | EVT VT = N->getValueType(0); | ||||
15123 | SDValue Op = N->getOperand(0); | ||||
15124 | SDLoc dl(N); | ||||
15125 | |||||
15126 | // Under Little endian, a VECTOR_REG_CAST is equivalent to a BITCAST | ||||
15127 | if (ST->isLittle()) | ||||
15128 | return DAG.getNode(ISD::BITCAST, dl, VT, Op); | ||||
15129 | |||||
15130 | // VECTOR_REG_CAST undef -> undef | ||||
15131 | if (Op.isUndef()) | ||||
15132 | return DAG.getUNDEF(VT); | ||||
15133 | |||||
15134 | // VECTOR_REG_CAST(VECTOR_REG_CAST(x)) == VECTOR_REG_CAST(x) | ||||
15135 | if (Op->getOpcode() == ARMISD::VECTOR_REG_CAST) { | ||||
15136 | // If the valuetypes are the same, we can remove the cast entirely. | ||||
15137 | if (Op->getOperand(0).getValueType() == VT) | ||||
15138 | return Op->getOperand(0); | ||||
15139 | return DAG.getNode(ARMISD::VECTOR_REG_CAST, dl, VT, Op->getOperand(0)); | ||||
15140 | } | ||||
15141 | |||||
15142 | return SDValue(); | ||||
15143 | } | ||||
15144 | |||||
15145 | static SDValue PerformVCMPCombine(SDNode *N, SelectionDAG &DAG, | ||||
15146 | const ARMSubtarget *Subtarget) { | ||||
15147 | if (!Subtarget->hasMVEIntegerOps()) | ||||
15148 | return SDValue(); | ||||
15149 | |||||
15150 | EVT VT = N->getValueType(0); | ||||
15151 | SDValue Op0 = N->getOperand(0); | ||||
15152 | SDValue Op1 = N->getOperand(1); | ||||
15153 | ARMCC::CondCodes Cond = | ||||
15154 | (ARMCC::CondCodes)cast<ConstantSDNode>(N->getOperand(2))->getZExtValue(); | ||||
15155 | SDLoc dl(N); | ||||
15156 | |||||
15157 | // vcmp X, 0, cc -> vcmpz X, cc | ||||
15158 | if (isZeroVector(Op1)) | ||||
15159 | return DAG.getNode(ARMISD::VCMPZ, dl, VT, Op0, N->getOperand(2)); | ||||
15160 | |||||
15161 | unsigned SwappedCond = getSwappedCondition(Cond); | ||||
15162 | if (isValidMVECond(SwappedCond, VT.isFloatingPoint())) { | ||||
15163 | // vcmp 0, X, cc -> vcmpz X, reversed(cc) | ||||
15164 | if (isZeroVector(Op0)) | ||||
15165 | return DAG.getNode(ARMISD::VCMPZ, dl, VT, Op1, | ||||
15166 | DAG.getConstant(SwappedCond, dl, MVT::i32)); | ||||
15167 | // vcmp vdup(Y), X, cc -> vcmp X, vdup(Y), reversed(cc) | ||||
15168 | if (Op0->getOpcode() == ARMISD::VDUP && Op1->getOpcode() != ARMISD::VDUP) | ||||
15169 | return DAG.getNode(ARMISD::VCMP, dl, VT, Op1, Op0, | ||||
15170 | DAG.getConstant(SwappedCond, dl, MVT::i32)); | ||||
15171 | } | ||||
15172 | |||||
15173 | return SDValue(); | ||||
15174 | } | ||||
15175 | |||||
15176 | /// PerformInsertEltCombine - Target-specific dag combine xforms for | ||||
15177 | /// ISD::INSERT_VECTOR_ELT. | ||||
15178 | static SDValue PerformInsertEltCombine(SDNode *N, | ||||
15179 | TargetLowering::DAGCombinerInfo &DCI) { | ||||
15180 | // Bitcast an i64 load inserted into a vector to f64. | ||||
15181 | // Otherwise, the i64 value will be legalized to a pair of i32 values. | ||||
15182 | EVT VT = N->getValueType(0); | ||||
15183 | SDNode *Elt = N->getOperand(1).getNode(); | ||||
15184 | if (VT.getVectorElementType() != MVT::i64 || | ||||
15185 | !ISD::isNormalLoad(Elt) || cast<LoadSDNode>(Elt)->isVolatile()) | ||||
15186 | return SDValue(); | ||||
15187 | |||||
15188 | SelectionDAG &DAG = DCI.DAG; | ||||
15189 | SDLoc dl(N); | ||||
15190 | EVT FloatVT = EVT::getVectorVT(*DAG.getContext(), MVT::f64, | ||||
15191 | VT.getVectorNumElements()); | ||||
15192 | SDValue Vec = DAG.getNode(ISD::BITCAST, dl, FloatVT, N->getOperand(0)); | ||||
15193 | SDValue V = DAG.getNode(ISD::BITCAST, dl, MVT::f64, N->getOperand(1)); | ||||
15194 | // Make the DAGCombiner fold the bitcasts. | ||||
15195 | DCI.AddToWorklist(Vec.getNode()); | ||||
15196 | DCI.AddToWorklist(V.getNode()); | ||||
15197 | SDValue InsElt = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, FloatVT, | ||||
15198 | Vec, V, N->getOperand(2)); | ||||
15199 | return DAG.getNode(ISD::BITCAST, dl, VT, InsElt); | ||||
15200 | } | ||||
15201 | |||||
15202 | // Convert a pair of extracts from the same base vector to a VMOVRRD. Either | ||||
15203 | // directly or bitcast to an integer if the original is a float vector. | ||||
15204 | // extract(x, n); extract(x, n+1) -> VMOVRRD(extract v2f64 x, n/2) | ||||
15205 | // bitcast(extract(x, n)); bitcast(extract(x, n+1)) -> VMOVRRD(extract x, n/2) | ||||
15206 | static SDValue | ||||
15207 | PerformExtractEltToVMOVRRD(SDNode *N, TargetLowering::DAGCombinerInfo &DCI) { | ||||
15208 | EVT VT = N->getValueType(0); | ||||
15209 | SDLoc dl(N); | ||||
15210 | |||||
15211 | if (!DCI.isAfterLegalizeDAG() || VT != MVT::i32 || | ||||
15212 | !DCI.DAG.getTargetLoweringInfo().isTypeLegal(MVT::f64)) | ||||
15213 | return SDValue(); | ||||
15214 | |||||
15215 | SDValue Ext = SDValue(N, 0); | ||||
15216 | if (Ext.getOpcode() == ISD::BITCAST && | ||||
15217 | Ext.getOperand(0).getValueType() == MVT::f32) | ||||
15218 | Ext = Ext.getOperand(0); | ||||
15219 | if (Ext.getOpcode() != ISD::EXTRACT_VECTOR_ELT || | ||||
15220 | !isa<ConstantSDNode>(Ext.getOperand(1)) || | ||||
15221 | Ext.getConstantOperandVal(1) % 2 != 0) | ||||
15222 | return SDValue(); | ||||
15223 | if (Ext->use_size() == 1 && | ||||
15224 | (Ext->use_begin()->getOpcode() == ISD::SINT_TO_FP || | ||||
15225 | Ext->use_begin()->getOpcode() == ISD::UINT_TO_FP)) | ||||
15226 | return SDValue(); | ||||
15227 | |||||
15228 | SDValue Op0 = Ext.getOperand(0); | ||||
15229 | EVT VecVT = Op0.getValueType(); | ||||
15230 | unsigned ResNo = Op0.getResNo(); | ||||
15231 | unsigned Lane = Ext.getConstantOperandVal(1); | ||||
15232 | if (VecVT.getVectorNumElements() != 4) | ||||
15233 | return SDValue(); | ||||
15234 | |||||
15235 | // Find another extract, of Lane + 1 | ||||
15236 | auto OtherIt = find_if(Op0->uses(), [&](SDNode *V) { | ||||
15237 | return V->getOpcode() == ISD::EXTRACT_VECTOR_ELT && | ||||
15238 | isa<ConstantSDNode>(V->getOperand(1)) && | ||||
15239 | V->getConstantOperandVal(1) == Lane + 1 && | ||||
15240 | V->getOperand(0).getResNo() == ResNo; | ||||
15241 | }); | ||||
15242 | if (OtherIt == Op0->uses().end()) | ||||
15243 | return SDValue(); | ||||
15244 | |||||
15245 | // For float extracts, we need to be converting to a i32 for both vector | ||||
15246 | // lanes. | ||||
15247 | SDValue OtherExt(*OtherIt, 0); | ||||
15248 | if (OtherExt.getValueType() != MVT::i32) { | ||||
15249 | if (OtherExt->use_size() != 1 || | ||||
15250 | OtherExt->use_begin()->getOpcode() != ISD::BITCAST || | ||||
15251 | OtherExt->use_begin()->getValueType(0) != MVT::i32) | ||||
15252 | return SDValue(); | ||||
15253 | OtherExt = SDValue(*OtherExt->use_begin(), 0); | ||||
15254 | } | ||||
15255 | |||||
15256 | // Convert the type to a f64 and extract with a VMOVRRD. | ||||
15257 | SDValue F64 = DCI.DAG.getNode( | ||||
15258 | ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, | ||||
15259 | DCI.DAG.getNode(ARMISD::VECTOR_REG_CAST, dl, MVT::v2f64, Op0), | ||||
15260 | DCI.DAG.getConstant(Ext.getConstantOperandVal(1) / 2, dl, MVT::i32)); | ||||
15261 | SDValue VMOVRRD = | ||||
15262 | DCI.DAG.getNode(ARMISD::VMOVRRD, dl, {MVT::i32, MVT::i32}, F64); | ||||
15263 | |||||
15264 | DCI.CombineTo(OtherExt.getNode(), SDValue(VMOVRRD.getNode(), 1)); | ||||
15265 | return VMOVRRD; | ||||
15266 | } | ||||
15267 | |||||
15268 | static SDValue PerformExtractEltCombine(SDNode *N, | ||||
15269 | TargetLowering::DAGCombinerInfo &DCI, | ||||
15270 | const ARMSubtarget *ST) { | ||||
15271 | SDValue Op0 = N->getOperand(0); | ||||
15272 | EVT VT = N->getValueType(0); | ||||
15273 | SDLoc dl(N); | ||||
15274 | |||||
15275 | // extract (vdup x) -> x | ||||
15276 | if (Op0->getOpcode() == ARMISD::VDUP) { | ||||
15277 | SDValue X = Op0->getOperand(0); | ||||
15278 | if (VT == MVT::f16 && X.getValueType() == MVT::i32) | ||||
15279 | return DCI.DAG.getNode(ARMISD::VMOVhr, dl, VT, X); | ||||
15280 | if (VT == MVT::i32 && X.getValueType() == MVT::f16) | ||||
15281 | return DCI.DAG.getNode(ARMISD::VMOVrh, dl, VT, X); | ||||
15282 | if (VT == MVT::f32 && X.getValueType() == MVT::i32) | ||||
15283 | return DCI.DAG.getNode(ISD::BITCAST, dl, VT, X); | ||||
15284 | |||||
15285 | while (X.getValueType() != VT && X->getOpcode() == ISD::BITCAST) | ||||
15286 | X = X->getOperand(0); | ||||
15287 | if (X.getValueType() == VT) | ||||
15288 | return X; | ||||
15289 | } | ||||
15290 | |||||
15291 | // extract ARM_BUILD_VECTOR -> x | ||||
15292 | if (Op0->getOpcode() == ARMISD::BUILD_VECTOR && | ||||
15293 | isa<ConstantSDNode>(N->getOperand(1)) && | ||||
15294 | N->getConstantOperandVal(1) < Op0.getNumOperands()) { | ||||
15295 | return Op0.getOperand(N->getConstantOperandVal(1)); | ||||
15296 | } | ||||
15297 | |||||
15298 | // extract(bitcast(BUILD_VECTOR(VMOVDRR(a, b), ..))) -> a or b | ||||
15299 | if (Op0.getValueType() == MVT::v4i32 && | ||||
15300 | isa<ConstantSDNode>(N->getOperand(1)) && | ||||
15301 | Op0.getOpcode() == ISD::BITCAST && | ||||
15302 | Op0.getOperand(0).getOpcode() == ISD::BUILD_VECTOR && | ||||
15303 | Op0.getOperand(0).getValueType() == MVT::v2f64) { | ||||
15304 | SDValue BV = Op0.getOperand(0); | ||||
15305 | unsigned Offset = N->getConstantOperandVal(1); | ||||
15306 | SDValue MOV = BV.getOperand(Offset < 2 ? 0 : 1); | ||||
15307 | if (MOV.getOpcode() == ARMISD::VMOVDRR) | ||||
15308 | return MOV.getOperand(ST->isLittle() ? Offset % 2 : 1 - Offset % 2); | ||||
15309 | } | ||||
15310 | |||||
15311 | // extract x, n; extract x, n+1 -> VMOVRRD x | ||||
15312 | if (SDValue R = PerformExtractEltToVMOVRRD(N, DCI)) | ||||
15313 | return R; | ||||
15314 | |||||
15315 | // extract (MVETrunc(x)) -> extract x | ||||
15316 | if (Op0->getOpcode() == ARMISD::MVETRUNC) { | ||||
15317 | unsigned Idx = N->getConstantOperandVal(1); | ||||
15318 | unsigned Vec = | ||||
15319 | Idx / Op0->getOperand(0).getValueType().getVectorNumElements(); | ||||
15320 | unsigned SubIdx = | ||||
15321 | Idx % Op0->getOperand(0).getValueType().getVectorNumElements(); | ||||
15322 | return DCI.DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, VT, Op0.getOperand(Vec), | ||||
15323 | DCI.DAG.getConstant(SubIdx, dl, MVT::i32)); | ||||
15324 | } | ||||
15325 | |||||
15326 | return SDValue(); | ||||
15327 | } | ||||
15328 | |||||
15329 | static SDValue PerformSignExtendInregCombine(SDNode *N, SelectionDAG &DAG) { | ||||
15330 | SDValue Op = N->getOperand(0); | ||||
15331 | EVT VT = N->getValueType(0); | ||||
15332 | |||||
15333 | // sext_inreg(VGETLANEu) -> VGETLANEs | ||||
15334 | if (Op.getOpcode() == ARMISD::VGETLANEu && | ||||
15335 | cast<VTSDNode>(N->getOperand(1))->getVT() == | ||||
15336 | Op.getOperand(0).getValueType().getScalarType()) | ||||
15337 | return DAG.getNode(ARMISD::VGETLANEs, SDLoc(N), VT, Op.getOperand(0), | ||||
15338 | Op.getOperand(1)); | ||||
15339 | |||||
15340 | return SDValue(); | ||||
15341 | } | ||||
15342 | |||||
15343 | // When lowering complex nodes that we recognize, like VQDMULH and MULH, we | ||||
15344 | // can end up with shuffle(binop(shuffle, shuffle)), that can be simplified to | ||||
15345 | // binop as the shuffles cancel out. | ||||
15346 | static SDValue FlattenVectorShuffle(ShuffleVectorSDNode *N, SelectionDAG &DAG) { | ||||
15347 | EVT VT = N->getValueType(0); | ||||
15348 | if (!N->getOperand(1).isUndef() || N->getOperand(0).getValueType() != VT) | ||||
15349 | return SDValue(); | ||||
15350 | SDValue Op = N->getOperand(0); | ||||
15351 | |||||
15352 | // Looking for binary operators that will have been folded from | ||||
15353 | // truncates/extends. | ||||
15354 | switch (Op.getOpcode()) { | ||||
15355 | case ARMISD::VQDMULH: | ||||
15356 | case ISD::MULHS: | ||||
15357 | case ISD::MULHU: | ||||
15358 | case ISD::ABDS: | ||||
15359 | case ISD::ABDU: | ||||
15360 | case ISD::AVGFLOORS: | ||||
15361 | case ISD::AVGFLOORU: | ||||
15362 | case ISD::AVGCEILS: | ||||
15363 | case ISD::AVGCEILU: | ||||
15364 | break; | ||||
15365 | default: | ||||
15366 | return SDValue(); | ||||
15367 | } | ||||
15368 | |||||
15369 | ShuffleVectorSDNode *Op0 = dyn_cast<ShuffleVectorSDNode>(Op.getOperand(0)); | ||||
15370 | ShuffleVectorSDNode *Op1 = dyn_cast<ShuffleVectorSDNode>(Op.getOperand(1)); | ||||
15371 | if (!Op0 || !Op1 || !Op0->getOperand(1).isUndef() || | ||||
15372 | !Op1->getOperand(1).isUndef() || Op0->getMask() != Op1->getMask() || | ||||
15373 | Op0->getOperand(0).getValueType() != VT) | ||||
15374 | return SDValue(); | ||||
15375 | |||||
15376 | // Check the mask turns into an identity shuffle. | ||||
15377 | ArrayRef<int> NMask = N->getMask(); | ||||
15378 | ArrayRef<int> OpMask = Op0->getMask(); | ||||
15379 | for (int i = 0, e = NMask.size(); i != e; i++) { | ||||
15380 | if (NMask[i] > 0 && OpMask[NMask[i]] > 0 && OpMask[NMask[i]] != i) | ||||
15381 | return SDValue(); | ||||
15382 | } | ||||
15383 | |||||
15384 | return DAG.getNode(Op.getOpcode(), SDLoc(Op), Op.getValueType(), | ||||
15385 | Op0->getOperand(0), Op1->getOperand(0)); | ||||
15386 | } | ||||
15387 | |||||
15388 | static SDValue | ||||
15389 | PerformInsertSubvectorCombine(SDNode *N, TargetLowering::DAGCombinerInfo &DCI) { | ||||
15390 | SDValue Vec = N->getOperand(0); | ||||
15391 | SDValue SubVec = N->getOperand(1); | ||||
15392 | uint64_t IdxVal = N->getConstantOperandVal(2); | ||||
15393 | EVT VecVT = Vec.getValueType(); | ||||
15394 | EVT SubVT = SubVec.getValueType(); | ||||
15395 | |||||
15396 | // Only do this for legal fixed vector types. | ||||
15397 | if (!VecVT.isFixedLengthVector() || | ||||
15398 | !DCI.DAG.getTargetLoweringInfo().isTypeLegal(VecVT) || | ||||
15399 | !DCI.DAG.getTargetLoweringInfo().isTypeLegal(SubVT)) | ||||
15400 | return SDValue(); | ||||
15401 | |||||
15402 | // Ignore widening patterns. | ||||
15403 | if (IdxVal == 0 && Vec.isUndef()) | ||||
15404 | return SDValue(); | ||||
15405 | |||||
15406 | // Subvector must be half the width and an "aligned" insertion. | ||||
15407 | unsigned NumSubElts = SubVT.getVectorNumElements(); | ||||
15408 | if ((SubVT.getSizeInBits() * 2) != VecVT.getSizeInBits() || | ||||
15409 | (IdxVal != 0 && IdxVal != NumSubElts)) | ||||
15410 | return SDValue(); | ||||
15411 | |||||
15412 | // Fold insert_subvector -> concat_vectors | ||||
15413 | // insert_subvector(Vec,Sub,lo) -> concat_vectors(Sub,extract(Vec,hi)) | ||||
15414 | // insert_subvector(Vec,Sub,hi) -> concat_vectors(extract(Vec,lo),Sub) | ||||
15415 | SDLoc DL(N); | ||||
15416 | SDValue Lo, Hi; | ||||
15417 | if (IdxVal == 0) { | ||||
15418 | Lo = SubVec; | ||||
15419 | Hi = DCI.DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, SubVT, Vec, | ||||
15420 | DCI.DAG.getVectorIdxConstant(NumSubElts, DL)); | ||||
15421 | } else { | ||||
15422 | Lo = DCI.DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, SubVT, Vec, | ||||
15423 | DCI.DAG.getVectorIdxConstant(0, DL)); | ||||
15424 | Hi = SubVec; | ||||
15425 | } | ||||
15426 | return DCI.DAG.getNode(ISD::CONCAT_VECTORS, DL, VecVT, Lo, Hi); | ||||
15427 | } | ||||
15428 | |||||
15429 | // shuffle(MVETrunc(x, y)) -> VMOVN(x, y) | ||||
15430 | static SDValue PerformShuffleVMOVNCombine(ShuffleVectorSDNode *N, | ||||
15431 | SelectionDAG &DAG) { | ||||
15432 | SDValue Trunc = N->getOperand(0); | ||||
15433 | EVT VT = Trunc.getValueType(); | ||||
15434 | if (Trunc.getOpcode() != ARMISD::MVETRUNC || !N->getOperand(1).isUndef()) | ||||
15435 | return SDValue(); | ||||
15436 | |||||
15437 | SDLoc DL(Trunc); | ||||
15438 | if (isVMOVNTruncMask(N->getMask(), VT, false)) | ||||
15439 | return DAG.getNode( | ||||
15440 | ARMISD::VMOVN, DL, VT, | ||||
15441 | DAG.getNode(ARMISD::VECTOR_REG_CAST, DL, VT, Trunc.getOperand(0)), | ||||
15442 | DAG.getNode(ARMISD::VECTOR_REG_CAST, DL, VT, Trunc.getOperand(1)), | ||||
15443 | DAG.getConstant(1, DL, MVT::i32)); | ||||
15444 | else if (isVMOVNTruncMask(N->getMask(), VT, true)) | ||||
15445 | return DAG.getNode( | ||||
15446 | ARMISD::VMOVN, DL, VT, | ||||
15447 | DAG.getNode(ARMISD::VECTOR_REG_CAST, DL, VT, Trunc.getOperand(1)), | ||||
15448 | DAG.getNode(ARMISD::VECTOR_REG_CAST, DL, VT, Trunc.getOperand(0)), | ||||
15449 | DAG.getConstant(1, DL, MVT::i32)); | ||||
15450 | return SDValue(); | ||||
15451 | } | ||||
15452 | |||||
15453 | /// PerformVECTOR_SHUFFLECombine - Target-specific dag combine xforms for | ||||
15454 | /// ISD::VECTOR_SHUFFLE. | ||||
15455 | static SDValue PerformVECTOR_SHUFFLECombine(SDNode *N, SelectionDAG &DAG) { | ||||
15456 | if (SDValue R = FlattenVectorShuffle(cast<ShuffleVectorSDNode>(N), DAG)) | ||||
15457 | return R; | ||||
15458 | if (SDValue R = PerformShuffleVMOVNCombine(cast<ShuffleVectorSDNode>(N), DAG)) | ||||
15459 | return R; | ||||
15460 | |||||
15461 | // The LLVM shufflevector instruction does not require the shuffle mask | ||||
15462 | // length to match the operand vector length, but ISD::VECTOR_SHUFFLE does | ||||
15463 | // have that requirement. When translating to ISD::VECTOR_SHUFFLE, if the | ||||
15464 | // operands do not match the mask length, they are extended by concatenating | ||||
15465 | // them with undef vectors. That is probably the right thing for other | ||||
15466 | // targets, but for NEON it is better to concatenate two double-register | ||||
15467 | // size vector operands into a single quad-register size vector. Do that | ||||
15468 | // transformation here: | ||||
15469 | // shuffle(concat(v1, undef), concat(v2, undef)) -> | ||||
15470 | // shuffle(concat(v1, v2), undef) | ||||
15471 | SDValue Op0 = N->getOperand(0); | ||||
15472 | SDValue Op1 = N->getOperand(1); | ||||
15473 | if (Op0.getOpcode() != ISD::CONCAT_VECTORS || | ||||
15474 | Op1.getOpcode() != ISD::CONCAT_VECTORS || | ||||
15475 | Op0.getNumOperands() != 2 || | ||||
15476 | Op1.getNumOperands() != 2) | ||||
15477 | return SDValue(); | ||||
15478 | SDValue Concat0Op1 = Op0.getOperand(1); | ||||
15479 | SDValue Concat1Op1 = Op1.getOperand(1); | ||||
15480 | if (!Concat0Op1.isUndef() || !Concat1Op1.isUndef()) | ||||
15481 | return SDValue(); | ||||
15482 | // Skip the transformation if any of the types are illegal. | ||||
15483 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | ||||
15484 | EVT VT = N->getValueType(0); | ||||
15485 | if (!TLI.isTypeLegal(VT) || | ||||
15486 | !TLI.isTypeLegal(Concat0Op1.getValueType()) || | ||||
15487 | !TLI.isTypeLegal(Concat1Op1.getValueType())) | ||||
15488 | return SDValue(); | ||||
15489 | |||||
15490 | SDValue NewConcat = DAG.getNode(ISD::CONCAT_VECTORS, SDLoc(N), VT, | ||||
15491 | Op0.getOperand(0), Op1.getOperand(0)); | ||||
15492 | // Translate the shuffle mask. | ||||
15493 | SmallVector<int, 16> NewMask; | ||||
15494 | unsigned NumElts = VT.getVectorNumElements(); | ||||
15495 | unsigned HalfElts = NumElts/2; | ||||
15496 | ShuffleVectorSDNode *SVN = cast<ShuffleVectorSDNode>(N); | ||||
15497 | for (unsigned n = 0; n < NumElts; ++n) { | ||||
15498 | int MaskElt = SVN->getMaskElt(n); | ||||
15499 | int NewElt = -1; | ||||
15500 | if (MaskElt < (int)HalfElts) | ||||
15501 | NewElt = MaskElt; | ||||
15502 | else if (MaskElt >= (int)NumElts && MaskElt < (int)(NumElts + HalfElts)) | ||||
15503 | NewElt = HalfElts + MaskElt - NumElts; | ||||
15504 | NewMask.push_back(NewElt); | ||||
15505 | } | ||||
15506 | return DAG.getVectorShuffle(VT, SDLoc(N), NewConcat, | ||||
15507 | DAG.getUNDEF(VT), NewMask); | ||||
15508 | } | ||||
15509 | |||||
15510 | /// Load/store instruction that can be merged with a base address | ||||
15511 | /// update | ||||
15512 | struct BaseUpdateTarget { | ||||
15513 | SDNode *N; | ||||
15514 | bool isIntrinsic; | ||||
15515 | bool isStore; | ||||
15516 | unsigned AddrOpIdx; | ||||
15517 | }; | ||||
15518 | |||||
15519 | struct BaseUpdateUser { | ||||
15520 | /// Instruction that updates a pointer | ||||
15521 | SDNode *N; | ||||
15522 | /// Pointer increment operand | ||||
15523 | SDValue Inc; | ||||
15524 | /// Pointer increment value if it is a constant, or 0 otherwise | ||||
15525 | unsigned ConstInc; | ||||
15526 | }; | ||||
15527 | |||||
15528 | static bool TryCombineBaseUpdate(struct BaseUpdateTarget &Target, | ||||
15529 | struct BaseUpdateUser &User, | ||||
15530 | bool SimpleConstIncOnly, | ||||
15531 | TargetLowering::DAGCombinerInfo &DCI) { | ||||
15532 | SelectionDAG &DAG = DCI.DAG; | ||||
15533 | SDNode *N = Target.N; | ||||
15534 | MemSDNode *MemN = cast<MemSDNode>(N); | ||||
15535 | SDLoc dl(N); | ||||
15536 | |||||
15537 | // Find the new opcode for the updating load/store. | ||||
15538 | bool isLoadOp = true; | ||||
15539 | bool isLaneOp = false; | ||||
15540 | // Workaround for vst1x and vld1x intrinsics which do not have alignment | ||||
15541 | // as an operand. | ||||
15542 | bool hasAlignment = true; | ||||
15543 | unsigned NewOpc = 0; | ||||
15544 | unsigned NumVecs = 0; | ||||
15545 | if (Target.isIntrinsic) { | ||||
15546 | unsigned IntNo = cast<ConstantSDNode>(N->getOperand(1))->getZExtValue(); | ||||
15547 | switch (IntNo) { | ||||
15548 | default: | ||||
15549 | llvm_unreachable("unexpected intrinsic for Neon base update")::llvm::llvm_unreachable_internal("unexpected intrinsic for Neon base update" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 15549); | ||||
15550 | case Intrinsic::arm_neon_vld1: | ||||
15551 | NewOpc = ARMISD::VLD1_UPD; | ||||
15552 | NumVecs = 1; | ||||
15553 | break; | ||||
15554 | case Intrinsic::arm_neon_vld2: | ||||
15555 | NewOpc = ARMISD::VLD2_UPD; | ||||
15556 | NumVecs = 2; | ||||
15557 | break; | ||||
15558 | case Intrinsic::arm_neon_vld3: | ||||
15559 | NewOpc = ARMISD::VLD3_UPD; | ||||
15560 | NumVecs = 3; | ||||
15561 | break; | ||||
15562 | case Intrinsic::arm_neon_vld4: | ||||
15563 | NewOpc = ARMISD::VLD4_UPD; | ||||
15564 | NumVecs = 4; | ||||
15565 | break; | ||||
15566 | case Intrinsic::arm_neon_vld1x2: | ||||
15567 | NewOpc = ARMISD::VLD1x2_UPD; | ||||
15568 | NumVecs = 2; | ||||
15569 | hasAlignment = false; | ||||
15570 | break; | ||||
15571 | case Intrinsic::arm_neon_vld1x3: | ||||
15572 | NewOpc = ARMISD::VLD1x3_UPD; | ||||
15573 | NumVecs = 3; | ||||
15574 | hasAlignment = false; | ||||
15575 | break; | ||||
15576 | case Intrinsic::arm_neon_vld1x4: | ||||
15577 | NewOpc = ARMISD::VLD1x4_UPD; | ||||
15578 | NumVecs = 4; | ||||
15579 | hasAlignment = false; | ||||
15580 | break; | ||||
15581 | case Intrinsic::arm_neon_vld2dup: | ||||
15582 | NewOpc = ARMISD::VLD2DUP_UPD; | ||||
15583 | NumVecs = 2; | ||||
15584 | break; | ||||
15585 | case Intrinsic::arm_neon_vld3dup: | ||||
15586 | NewOpc = ARMISD::VLD3DUP_UPD; | ||||
15587 | NumVecs = 3; | ||||
15588 | break; | ||||
15589 | case Intrinsic::arm_neon_vld4dup: | ||||
15590 | NewOpc = ARMISD::VLD4DUP_UPD; | ||||
15591 | NumVecs = 4; | ||||
15592 | break; | ||||
15593 | case Intrinsic::arm_neon_vld2lane: | ||||
15594 | NewOpc = ARMISD::VLD2LN_UPD; | ||||
15595 | NumVecs = 2; | ||||
15596 | isLaneOp = true; | ||||
15597 | break; | ||||
15598 | case Intrinsic::arm_neon_vld3lane: | ||||
15599 | NewOpc = ARMISD::VLD3LN_UPD; | ||||
15600 | NumVecs = 3; | ||||
15601 | isLaneOp = true; | ||||
15602 | break; | ||||
15603 | case Intrinsic::arm_neon_vld4lane: | ||||
15604 | NewOpc = ARMISD::VLD4LN_UPD; | ||||
15605 | NumVecs = 4; | ||||
15606 | isLaneOp = true; | ||||
15607 | break; | ||||
15608 | case Intrinsic::arm_neon_vst1: | ||||
15609 | NewOpc = ARMISD::VST1_UPD; | ||||
15610 | NumVecs = 1; | ||||
15611 | isLoadOp = false; | ||||
15612 | break; | ||||
15613 | case Intrinsic::arm_neon_vst2: | ||||
15614 | NewOpc = ARMISD::VST2_UPD; | ||||
15615 | NumVecs = 2; | ||||
15616 | isLoadOp = false; | ||||
15617 | break; | ||||
15618 | case Intrinsic::arm_neon_vst3: | ||||
15619 | NewOpc = ARMISD::VST3_UPD; | ||||
15620 | NumVecs = 3; | ||||
15621 | isLoadOp = false; | ||||
15622 | break; | ||||
15623 | case Intrinsic::arm_neon_vst4: | ||||
15624 | NewOpc = ARMISD::VST4_UPD; | ||||
15625 | NumVecs = 4; | ||||
15626 | isLoadOp = false; | ||||
15627 | break; | ||||
15628 | case Intrinsic::arm_neon_vst2lane: | ||||
15629 | NewOpc = ARMISD::VST2LN_UPD; | ||||
15630 | NumVecs = 2; | ||||
15631 | isLoadOp = false; | ||||
15632 | isLaneOp = true; | ||||
15633 | break; | ||||
15634 | case Intrinsic::arm_neon_vst3lane: | ||||
15635 | NewOpc = ARMISD::VST3LN_UPD; | ||||
15636 | NumVecs = 3; | ||||
15637 | isLoadOp = false; | ||||
15638 | isLaneOp = true; | ||||
15639 | break; | ||||
15640 | case Intrinsic::arm_neon_vst4lane: | ||||
15641 | NewOpc = ARMISD::VST4LN_UPD; | ||||
15642 | NumVecs = 4; | ||||
15643 | isLoadOp = false; | ||||
15644 | isLaneOp = true; | ||||
15645 | break; | ||||
15646 | case Intrinsic::arm_neon_vst1x2: | ||||
15647 | NewOpc = ARMISD::VST1x2_UPD; | ||||
15648 | NumVecs = 2; | ||||
15649 | isLoadOp = false; | ||||
15650 | hasAlignment = false; | ||||
15651 | break; | ||||
15652 | case Intrinsic::arm_neon_vst1x3: | ||||
15653 | NewOpc = ARMISD::VST1x3_UPD; | ||||
15654 | NumVecs = 3; | ||||
15655 | isLoadOp = false; | ||||
15656 | hasAlignment = false; | ||||
15657 | break; | ||||
15658 | case Intrinsic::arm_neon_vst1x4: | ||||
15659 | NewOpc = ARMISD::VST1x4_UPD; | ||||
15660 | NumVecs = 4; | ||||
15661 | isLoadOp = false; | ||||
15662 | hasAlignment = false; | ||||
15663 | break; | ||||
15664 | } | ||||
15665 | } else { | ||||
15666 | isLaneOp = true; | ||||
15667 | switch (N->getOpcode()) { | ||||
15668 | default: | ||||
15669 | llvm_unreachable("unexpected opcode for Neon base update")::llvm::llvm_unreachable_internal("unexpected opcode for Neon base update" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 15669); | ||||
15670 | case ARMISD::VLD1DUP: | ||||
15671 | NewOpc = ARMISD::VLD1DUP_UPD; | ||||
15672 | NumVecs = 1; | ||||
15673 | break; | ||||
15674 | case ARMISD::VLD2DUP: | ||||
15675 | NewOpc = ARMISD::VLD2DUP_UPD; | ||||
15676 | NumVecs = 2; | ||||
15677 | break; | ||||
15678 | case ARMISD::VLD3DUP: | ||||
15679 | NewOpc = ARMISD::VLD3DUP_UPD; | ||||
15680 | NumVecs = 3; | ||||
15681 | break; | ||||
15682 | case ARMISD::VLD4DUP: | ||||
15683 | NewOpc = ARMISD::VLD4DUP_UPD; | ||||
15684 | NumVecs = 4; | ||||
15685 | break; | ||||
15686 | case ISD::LOAD: | ||||
15687 | NewOpc = ARMISD::VLD1_UPD; | ||||
15688 | NumVecs = 1; | ||||
15689 | isLaneOp = false; | ||||
15690 | break; | ||||
15691 | case ISD::STORE: | ||||
15692 | NewOpc = ARMISD::VST1_UPD; | ||||
15693 | NumVecs = 1; | ||||
15694 | isLaneOp = false; | ||||
15695 | isLoadOp = false; | ||||
15696 | break; | ||||
15697 | } | ||||
15698 | } | ||||
15699 | |||||
15700 | // Find the size of memory referenced by the load/store. | ||||
15701 | EVT VecTy; | ||||
15702 | if (isLoadOp) { | ||||
15703 | VecTy = N->getValueType(0); | ||||
15704 | } else if (Target.isIntrinsic) { | ||||
15705 | VecTy = N->getOperand(Target.AddrOpIdx + 1).getValueType(); | ||||
15706 | } else { | ||||
15707 | assert(Target.isStore &&(static_cast <bool> (Target.isStore && "Node has to be a load, a store, or an intrinsic!" ) ? void (0) : __assert_fail ("Target.isStore && \"Node has to be a load, a store, or an intrinsic!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 15708, __extension__ __PRETTY_FUNCTION__)) | ||||
15708 | "Node has to be a load, a store, or an intrinsic!")(static_cast <bool> (Target.isStore && "Node has to be a load, a store, or an intrinsic!" ) ? void (0) : __assert_fail ("Target.isStore && \"Node has to be a load, a store, or an intrinsic!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 15708, __extension__ __PRETTY_FUNCTION__)); | ||||
15709 | VecTy = N->getOperand(1).getValueType(); | ||||
15710 | } | ||||
15711 | |||||
15712 | bool isVLDDUPOp = | ||||
15713 | NewOpc == ARMISD::VLD1DUP_UPD || NewOpc == ARMISD::VLD2DUP_UPD || | ||||
15714 | NewOpc == ARMISD::VLD3DUP_UPD || NewOpc == ARMISD::VLD4DUP_UPD; | ||||
15715 | |||||
15716 | unsigned NumBytes = NumVecs * VecTy.getSizeInBits() / 8; | ||||
15717 | if (isLaneOp || isVLDDUPOp) | ||||
15718 | NumBytes /= VecTy.getVectorNumElements(); | ||||
15719 | |||||
15720 | if (NumBytes >= 3 * 16 && User.ConstInc != NumBytes) { | ||||
15721 | // VLD3/4 and VST3/4 for 128-bit vectors are implemented with two | ||||
15722 | // separate instructions that make it harder to use a non-constant update. | ||||
15723 | return false; | ||||
15724 | } | ||||
15725 | |||||
15726 | if (SimpleConstIncOnly && User.ConstInc != NumBytes) | ||||
15727 | return false; | ||||
15728 | |||||
15729 | // OK, we found an ADD we can fold into the base update. | ||||
15730 | // Now, create a _UPD node, taking care of not breaking alignment. | ||||
15731 | |||||
15732 | EVT AlignedVecTy = VecTy; | ||||
15733 | unsigned Alignment = MemN->getAlignment(); | ||||
15734 | |||||
15735 | // If this is a less-than-standard-aligned load/store, change the type to | ||||
15736 | // match the standard alignment. | ||||
15737 | // The alignment is overlooked when selecting _UPD variants; and it's | ||||
15738 | // easier to introduce bitcasts here than fix that. | ||||
15739 | // There are 3 ways to get to this base-update combine: | ||||
15740 | // - intrinsics: they are assumed to be properly aligned (to the standard | ||||
15741 | // alignment of the memory type), so we don't need to do anything. | ||||
15742 | // - ARMISD::VLDx nodes: they are only generated from the aforementioned | ||||
15743 | // intrinsics, so, likewise, there's nothing to do. | ||||
15744 | // - generic load/store instructions: the alignment is specified as an | ||||
15745 | // explicit operand, rather than implicitly as the standard alignment | ||||
15746 | // of the memory type (like the intrisics). We need to change the | ||||
15747 | // memory type to match the explicit alignment. That way, we don't | ||||
15748 | // generate non-standard-aligned ARMISD::VLDx nodes. | ||||
15749 | if (isa<LSBaseSDNode>(N)) { | ||||
15750 | if (Alignment == 0) | ||||
15751 | Alignment = 1; | ||||
15752 | if (Alignment < VecTy.getScalarSizeInBits() / 8) { | ||||
15753 | MVT EltTy = MVT::getIntegerVT(Alignment * 8); | ||||
15754 | assert(NumVecs == 1 && "Unexpected multi-element generic load/store.")(static_cast <bool> (NumVecs == 1 && "Unexpected multi-element generic load/store." ) ? void (0) : __assert_fail ("NumVecs == 1 && \"Unexpected multi-element generic load/store.\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 15754, __extension__ __PRETTY_FUNCTION__)); | ||||
15755 | assert(!isLaneOp && "Unexpected generic load/store lane.")(static_cast <bool> (!isLaneOp && "Unexpected generic load/store lane." ) ? void (0) : __assert_fail ("!isLaneOp && \"Unexpected generic load/store lane.\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 15755, __extension__ __PRETTY_FUNCTION__)); | ||||
15756 | unsigned NumElts = NumBytes / (EltTy.getSizeInBits() / 8); | ||||
15757 | AlignedVecTy = MVT::getVectorVT(EltTy, NumElts); | ||||
15758 | } | ||||
15759 | // Don't set an explicit alignment on regular load/stores that we want | ||||
15760 | // to transform to VLD/VST 1_UPD nodes. | ||||
15761 | // This matches the behavior of regular load/stores, which only get an | ||||
15762 | // explicit alignment if the MMO alignment is larger than the standard | ||||
15763 | // alignment of the memory type. | ||||
15764 | // Intrinsics, however, always get an explicit alignment, set to the | ||||
15765 | // alignment of the MMO. | ||||
15766 | Alignment = 1; | ||||
15767 | } | ||||
15768 | |||||
15769 | // Create the new updating load/store node. | ||||
15770 | // First, create an SDVTList for the new updating node's results. | ||||
15771 | EVT Tys[6]; | ||||
15772 | unsigned NumResultVecs = (isLoadOp ? NumVecs : 0); | ||||
15773 | unsigned n; | ||||
15774 | for (n = 0; n < NumResultVecs; ++n) | ||||
15775 | Tys[n] = AlignedVecTy; | ||||
15776 | Tys[n++] = MVT::i32; | ||||
15777 | Tys[n] = MVT::Other; | ||||
15778 | SDVTList SDTys = DAG.getVTList(makeArrayRef(Tys, NumResultVecs + 2)); | ||||
15779 | |||||
15780 | // Then, gather the new node's operands. | ||||
15781 | SmallVector<SDValue, 8> Ops; | ||||
15782 | Ops.push_back(N->getOperand(0)); // incoming chain | ||||
15783 | Ops.push_back(N->getOperand(Target.AddrOpIdx)); | ||||
15784 | Ops.push_back(User.Inc); | ||||
15785 | |||||
15786 | if (StoreSDNode *StN = dyn_cast<StoreSDNode>(N)) { | ||||
15787 | // Try to match the intrinsic's signature | ||||
15788 | Ops.push_back(StN->getValue()); | ||||
15789 | } else { | ||||
15790 | // Loads (and of course intrinsics) match the intrinsics' signature, | ||||
15791 | // so just add all but the alignment operand. | ||||
15792 | unsigned LastOperand = | ||||
15793 | hasAlignment ? N->getNumOperands() - 1 : N->getNumOperands(); | ||||
15794 | for (unsigned i = Target.AddrOpIdx + 1; i < LastOperand; ++i) | ||||
15795 | Ops.push_back(N->getOperand(i)); | ||||
15796 | } | ||||
15797 | |||||
15798 | // For all node types, the alignment operand is always the last one. | ||||
15799 | Ops.push_back(DAG.getConstant(Alignment, dl, MVT::i32)); | ||||
15800 | |||||
15801 | // If this is a non-standard-aligned STORE, the penultimate operand is the | ||||
15802 | // stored value. Bitcast it to the aligned type. | ||||
15803 | if (AlignedVecTy != VecTy && N->getOpcode() == ISD::STORE) { | ||||
15804 | SDValue &StVal = Ops[Ops.size() - 2]; | ||||
15805 | StVal = DAG.getNode(ISD::BITCAST, dl, AlignedVecTy, StVal); | ||||
15806 | } | ||||
15807 | |||||
15808 | EVT LoadVT = isLaneOp ? VecTy.getVectorElementType() : AlignedVecTy; | ||||
15809 | SDValue UpdN = DAG.getMemIntrinsicNode(NewOpc, dl, SDTys, Ops, LoadVT, | ||||
15810 | MemN->getMemOperand()); | ||||
15811 | |||||
15812 | // Update the uses. | ||||
15813 | SmallVector<SDValue, 5> NewResults; | ||||
15814 | for (unsigned i = 0; i < NumResultVecs; ++i) | ||||
15815 | NewResults.push_back(SDValue(UpdN.getNode(), i)); | ||||
15816 | |||||
15817 | // If this is an non-standard-aligned LOAD, the first result is the loaded | ||||
15818 | // value. Bitcast it to the expected result type. | ||||
15819 | if (AlignedVecTy != VecTy && N->getOpcode() == ISD::LOAD) { | ||||
15820 | SDValue &LdVal = NewResults[0]; | ||||
15821 | LdVal = DAG.getNode(ISD::BITCAST, dl, VecTy, LdVal); | ||||
15822 | } | ||||
15823 | |||||
15824 | NewResults.push_back(SDValue(UpdN.getNode(), NumResultVecs + 1)); // chain | ||||
15825 | DCI.CombineTo(N, NewResults); | ||||
15826 | DCI.CombineTo(User.N, SDValue(UpdN.getNode(), NumResultVecs)); | ||||
15827 | |||||
15828 | return true; | ||||
15829 | } | ||||
15830 | |||||
15831 | // If (opcode ptr inc) is and ADD-like instruction, return the | ||||
15832 | // increment value. Otherwise return 0. | ||||
15833 | static unsigned getPointerConstIncrement(unsigned Opcode, SDValue Ptr, | ||||
15834 | SDValue Inc, const SelectionDAG &DAG) { | ||||
15835 | ConstantSDNode *CInc = dyn_cast<ConstantSDNode>(Inc.getNode()); | ||||
15836 | if (!CInc) | ||||
15837 | return 0; | ||||
15838 | |||||
15839 | switch (Opcode) { | ||||
15840 | case ARMISD::VLD1_UPD: | ||||
15841 | case ISD::ADD: | ||||
15842 | return CInc->getZExtValue(); | ||||
15843 | case ISD::OR: { | ||||
15844 | if (DAG.haveNoCommonBitsSet(Ptr, Inc)) { | ||||
15845 | // (OR ptr inc) is the same as (ADD ptr inc) | ||||
15846 | return CInc->getZExtValue(); | ||||
15847 | } | ||||
15848 | return 0; | ||||
15849 | } | ||||
15850 | default: | ||||
15851 | return 0; | ||||
15852 | } | ||||
15853 | } | ||||
15854 | |||||
15855 | static bool findPointerConstIncrement(SDNode *N, SDValue *Ptr, SDValue *CInc) { | ||||
15856 | switch (N->getOpcode()) { | ||||
15857 | case ISD::ADD: | ||||
15858 | case ISD::OR: { | ||||
15859 | if (isa<ConstantSDNode>(N->getOperand(1))) { | ||||
15860 | *Ptr = N->getOperand(0); | ||||
15861 | *CInc = N->getOperand(1); | ||||
15862 | return true; | ||||
15863 | } | ||||
15864 | return false; | ||||
15865 | } | ||||
15866 | case ARMISD::VLD1_UPD: { | ||||
15867 | if (isa<ConstantSDNode>(N->getOperand(2))) { | ||||
15868 | *Ptr = N->getOperand(1); | ||||
15869 | *CInc = N->getOperand(2); | ||||
15870 | return true; | ||||
15871 | } | ||||
15872 | return false; | ||||
15873 | } | ||||
15874 | default: | ||||
15875 | return false; | ||||
15876 | } | ||||
15877 | } | ||||
15878 | |||||
15879 | static bool isValidBaseUpdate(SDNode *N, SDNode *User) { | ||||
15880 | // Check that the add is independent of the load/store. | ||||
15881 | // Otherwise, folding it would create a cycle. Search through Addr | ||||
15882 | // as well, since the User may not be a direct user of Addr and | ||||
15883 | // only share a base pointer. | ||||
15884 | SmallPtrSet<const SDNode *, 32> Visited; | ||||
15885 | SmallVector<const SDNode *, 16> Worklist; | ||||
15886 | Worklist.push_back(N); | ||||
15887 | Worklist.push_back(User); | ||||
15888 | if (SDNode::hasPredecessorHelper(N, Visited, Worklist) || | ||||
15889 | SDNode::hasPredecessorHelper(User, Visited, Worklist)) | ||||
15890 | return false; | ||||
15891 | return true; | ||||
15892 | } | ||||
15893 | |||||
15894 | /// CombineBaseUpdate - Target-specific DAG combine function for VLDDUP, | ||||
15895 | /// NEON load/store intrinsics, and generic vector load/stores, to merge | ||||
15896 | /// base address updates. | ||||
15897 | /// For generic load/stores, the memory type is assumed to be a vector. | ||||
15898 | /// The caller is assumed to have checked legality. | ||||
15899 | static SDValue CombineBaseUpdate(SDNode *N, | ||||
15900 | TargetLowering::DAGCombinerInfo &DCI) { | ||||
15901 | const bool isIntrinsic = (N->getOpcode() == ISD::INTRINSIC_VOID || | ||||
15902 | N->getOpcode() == ISD::INTRINSIC_W_CHAIN); | ||||
15903 | const bool isStore = N->getOpcode() == ISD::STORE; | ||||
15904 | const unsigned AddrOpIdx = ((isIntrinsic || isStore) ? 2 : 1); | ||||
15905 | BaseUpdateTarget Target = {N, isIntrinsic, isStore, AddrOpIdx}; | ||||
15906 | |||||
15907 | SDValue Addr = N->getOperand(AddrOpIdx); | ||||
15908 | |||||
15909 | SmallVector<BaseUpdateUser, 8> BaseUpdates; | ||||
15910 | |||||
15911 | // Search for a use of the address operand that is an increment. | ||||
15912 | for (SDNode::use_iterator UI = Addr.getNode()->use_begin(), | ||||
15913 | UE = Addr.getNode()->use_end(); UI != UE; ++UI) { | ||||
15914 | SDNode *User = *UI; | ||||
15915 | if (UI.getUse().getResNo() != Addr.getResNo() || | ||||
15916 | User->getNumOperands() != 2) | ||||
15917 | continue; | ||||
15918 | |||||
15919 | SDValue Inc = User->getOperand(UI.getOperandNo() == 1 ? 0 : 1); | ||||
15920 | unsigned ConstInc = | ||||
15921 | getPointerConstIncrement(User->getOpcode(), Addr, Inc, DCI.DAG); | ||||
15922 | |||||
15923 | if (ConstInc || User->getOpcode() == ISD::ADD) | ||||
15924 | BaseUpdates.push_back({User, Inc, ConstInc}); | ||||
15925 | } | ||||
15926 | |||||
15927 | // If the address is a constant pointer increment itself, find | ||||
15928 | // another constant increment that has the same base operand | ||||
15929 | SDValue Base; | ||||
15930 | SDValue CInc; | ||||
15931 | if (findPointerConstIncrement(Addr.getNode(), &Base, &CInc)) { | ||||
15932 | unsigned Offset = | ||||
15933 | getPointerConstIncrement(Addr->getOpcode(), Base, CInc, DCI.DAG); | ||||
15934 | for (SDNode::use_iterator UI = Base->use_begin(), UE = Base->use_end(); | ||||
15935 | UI != UE; ++UI) { | ||||
15936 | |||||
15937 | SDNode *User = *UI; | ||||
15938 | if (UI.getUse().getResNo() != Base.getResNo() || User == Addr.getNode() || | ||||
15939 | User->getNumOperands() != 2) | ||||
15940 | continue; | ||||
15941 | |||||
15942 | SDValue UserInc = User->getOperand(UI.getOperandNo() == 0 ? 1 : 0); | ||||
15943 | unsigned UserOffset = | ||||
15944 | getPointerConstIncrement(User->getOpcode(), Base, UserInc, DCI.DAG); | ||||
15945 | |||||
15946 | if (!UserOffset || UserOffset <= Offset) | ||||
15947 | continue; | ||||
15948 | |||||
15949 | unsigned NewConstInc = UserOffset - Offset; | ||||
15950 | SDValue NewInc = DCI.DAG.getConstant(NewConstInc, SDLoc(N), MVT::i32); | ||||
15951 | BaseUpdates.push_back({User, NewInc, NewConstInc}); | ||||
15952 | } | ||||
15953 | } | ||||
15954 | |||||
15955 | // Try to fold the load/store with an update that matches memory | ||||
15956 | // access size. This should work well for sequential loads. | ||||
15957 | // | ||||
15958 | // Filter out invalid updates as well. | ||||
15959 | unsigned NumValidUpd = BaseUpdates.size(); | ||||
15960 | for (unsigned I = 0; I < NumValidUpd;) { | ||||
15961 | BaseUpdateUser &User = BaseUpdates[I]; | ||||
15962 | if (!isValidBaseUpdate(N, User.N)) { | ||||
15963 | --NumValidUpd; | ||||
15964 | std::swap(BaseUpdates[I], BaseUpdates[NumValidUpd]); | ||||
15965 | continue; | ||||
15966 | } | ||||
15967 | |||||
15968 | if (TryCombineBaseUpdate(Target, User, /*SimpleConstIncOnly=*/true, DCI)) | ||||
15969 | return SDValue(); | ||||
15970 | ++I; | ||||
15971 | } | ||||
15972 | BaseUpdates.resize(NumValidUpd); | ||||
15973 | |||||
15974 | // Try to fold with other users. Non-constant updates are considered | ||||
15975 | // first, and constant updates are sorted to not break a sequence of | ||||
15976 | // strided accesses (if there is any). | ||||
15977 | std::stable_sort(BaseUpdates.begin(), BaseUpdates.end(), | ||||
15978 | [](const BaseUpdateUser &LHS, const BaseUpdateUser &RHS) { | ||||
15979 | return LHS.ConstInc < RHS.ConstInc; | ||||
15980 | }); | ||||
15981 | for (BaseUpdateUser &User : BaseUpdates) { | ||||
15982 | if (TryCombineBaseUpdate(Target, User, /*SimpleConstIncOnly=*/false, DCI)) | ||||
15983 | return SDValue(); | ||||
15984 | } | ||||
15985 | return SDValue(); | ||||
15986 | } | ||||
15987 | |||||
15988 | static SDValue PerformVLDCombine(SDNode *N, | ||||
15989 | TargetLowering::DAGCombinerInfo &DCI) { | ||||
15990 | if (DCI.isBeforeLegalize() || DCI.isCalledByLegalizer()) | ||||
15991 | return SDValue(); | ||||
15992 | |||||
15993 | return CombineBaseUpdate(N, DCI); | ||||
15994 | } | ||||
15995 | |||||
15996 | static SDValue PerformMVEVLDCombine(SDNode *N, | ||||
15997 | TargetLowering::DAGCombinerInfo &DCI) { | ||||
15998 | if (DCI.isBeforeLegalize() || DCI.isCalledByLegalizer()) | ||||
15999 | return SDValue(); | ||||
16000 | |||||
16001 | SelectionDAG &DAG = DCI.DAG; | ||||
16002 | SDValue Addr = N->getOperand(2); | ||||
16003 | MemSDNode *MemN = cast<MemSDNode>(N); | ||||
16004 | SDLoc dl(N); | ||||
16005 | |||||
16006 | // For the stores, where there are multiple intrinsics we only actually want | ||||
16007 | // to post-inc the last of the them. | ||||
16008 | unsigned IntNo = cast<ConstantSDNode>(N->getOperand(1))->getZExtValue(); | ||||
16009 | if (IntNo == Intrinsic::arm_mve_vst2q && | ||||
16010 | cast<ConstantSDNode>(N->getOperand(5))->getZExtValue() != 1) | ||||
16011 | return SDValue(); | ||||
16012 | if (IntNo == Intrinsic::arm_mve_vst4q && | ||||
16013 | cast<ConstantSDNode>(N->getOperand(7))->getZExtValue() != 3) | ||||
16014 | return SDValue(); | ||||
16015 | |||||
16016 | // Search for a use of the address operand that is an increment. | ||||
16017 | for (SDNode::use_iterator UI = Addr.getNode()->use_begin(), | ||||
16018 | UE = Addr.getNode()->use_end(); | ||||
16019 | UI != UE; ++UI) { | ||||
16020 | SDNode *User = *UI; | ||||
16021 | if (User->getOpcode() != ISD::ADD || | ||||
16022 | UI.getUse().getResNo() != Addr.getResNo()) | ||||
16023 | continue; | ||||
16024 | |||||
16025 | // Check that the add is independent of the load/store. Otherwise, folding | ||||
16026 | // it would create a cycle. We can avoid searching through Addr as it's a | ||||
16027 | // predecessor to both. | ||||
16028 | SmallPtrSet<const SDNode *, 32> Visited; | ||||
16029 | SmallVector<const SDNode *, 16> Worklist; | ||||
16030 | Visited.insert(Addr.getNode()); | ||||
16031 | Worklist.push_back(N); | ||||
16032 | Worklist.push_back(User); | ||||
16033 | if (SDNode::hasPredecessorHelper(N, Visited, Worklist) || | ||||
16034 | SDNode::hasPredecessorHelper(User, Visited, Worklist)) | ||||
16035 | continue; | ||||
16036 | |||||
16037 | // Find the new opcode for the updating load/store. | ||||
16038 | bool isLoadOp = true; | ||||
16039 | unsigned NewOpc = 0; | ||||
16040 | unsigned NumVecs = 0; | ||||
16041 | switch (IntNo) { | ||||
16042 | default: | ||||
16043 | llvm_unreachable("unexpected intrinsic for MVE VLDn combine")::llvm::llvm_unreachable_internal("unexpected intrinsic for MVE VLDn combine" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 16043); | ||||
16044 | case Intrinsic::arm_mve_vld2q: | ||||
16045 | NewOpc = ARMISD::VLD2_UPD; | ||||
16046 | NumVecs = 2; | ||||
16047 | break; | ||||
16048 | case Intrinsic::arm_mve_vld4q: | ||||
16049 | NewOpc = ARMISD::VLD4_UPD; | ||||
16050 | NumVecs = 4; | ||||
16051 | break; | ||||
16052 | case Intrinsic::arm_mve_vst2q: | ||||
16053 | NewOpc = ARMISD::VST2_UPD; | ||||
16054 | NumVecs = 2; | ||||
16055 | isLoadOp = false; | ||||
16056 | break; | ||||
16057 | case Intrinsic::arm_mve_vst4q: | ||||
16058 | NewOpc = ARMISD::VST4_UPD; | ||||
16059 | NumVecs = 4; | ||||
16060 | isLoadOp = false; | ||||
16061 | break; | ||||
16062 | } | ||||
16063 | |||||
16064 | // Find the size of memory referenced by the load/store. | ||||
16065 | EVT VecTy; | ||||
16066 | if (isLoadOp) { | ||||
16067 | VecTy = N->getValueType(0); | ||||
16068 | } else { | ||||
16069 | VecTy = N->getOperand(3).getValueType(); | ||||
16070 | } | ||||
16071 | |||||
16072 | unsigned NumBytes = NumVecs * VecTy.getSizeInBits() / 8; | ||||
16073 | |||||
16074 | // If the increment is a constant, it must match the memory ref size. | ||||
16075 | SDValue Inc = User->getOperand(User->getOperand(0) == Addr ? 1 : 0); | ||||
16076 | ConstantSDNode *CInc = dyn_cast<ConstantSDNode>(Inc.getNode()); | ||||
16077 | if (!CInc || CInc->getZExtValue() != NumBytes) | ||||
16078 | continue; | ||||
16079 | |||||
16080 | // Create the new updating load/store node. | ||||
16081 | // First, create an SDVTList for the new updating node's results. | ||||
16082 | EVT Tys[6]; | ||||
16083 | unsigned NumResultVecs = (isLoadOp ? NumVecs : 0); | ||||
16084 | unsigned n; | ||||
16085 | for (n = 0; n < NumResultVecs; ++n) | ||||
16086 | Tys[n] = VecTy; | ||||
16087 | Tys[n++] = MVT::i32; | ||||
16088 | Tys[n] = MVT::Other; | ||||
16089 | SDVTList SDTys = DAG.getVTList(makeArrayRef(Tys, NumResultVecs + 2)); | ||||
16090 | |||||
16091 | // Then, gather the new node's operands. | ||||
16092 | SmallVector<SDValue, 8> Ops; | ||||
16093 | Ops.push_back(N->getOperand(0)); // incoming chain | ||||
16094 | Ops.push_back(N->getOperand(2)); // ptr | ||||
16095 | Ops.push_back(Inc); | ||||
16096 | |||||
16097 | for (unsigned i = 3; i < N->getNumOperands(); ++i) | ||||
16098 | Ops.push_back(N->getOperand(i)); | ||||
16099 | |||||
16100 | SDValue UpdN = DAG.getMemIntrinsicNode(NewOpc, dl, SDTys, Ops, VecTy, | ||||
16101 | MemN->getMemOperand()); | ||||
16102 | |||||
16103 | // Update the uses. | ||||
16104 | SmallVector<SDValue, 5> NewResults; | ||||
16105 | for (unsigned i = 0; i < NumResultVecs; ++i) | ||||
16106 | NewResults.push_back(SDValue(UpdN.getNode(), i)); | ||||
16107 | |||||
16108 | NewResults.push_back(SDValue(UpdN.getNode(), NumResultVecs + 1)); // chain | ||||
16109 | DCI.CombineTo(N, NewResults); | ||||
16110 | DCI.CombineTo(User, SDValue(UpdN.getNode(), NumResultVecs)); | ||||
16111 | |||||
16112 | break; | ||||
16113 | } | ||||
16114 | |||||
16115 | return SDValue(); | ||||
16116 | } | ||||
16117 | |||||
16118 | /// CombineVLDDUP - For a VDUPLANE node N, check if its source operand is a | ||||
16119 | /// vldN-lane (N > 1) intrinsic, and if all the other uses of that intrinsic | ||||
16120 | /// are also VDUPLANEs. If so, combine them to a vldN-dup operation and | ||||
16121 | /// return true. | ||||
16122 | static bool CombineVLDDUP(SDNode *N, TargetLowering::DAGCombinerInfo &DCI) { | ||||
16123 | SelectionDAG &DAG = DCI.DAG; | ||||
16124 | EVT VT = N->getValueType(0); | ||||
16125 | // vldN-dup instructions only support 64-bit vectors for N > 1. | ||||
16126 | if (!VT.is64BitVector()) | ||||
16127 | return false; | ||||
16128 | |||||
16129 | // Check if the VDUPLANE operand is a vldN-dup intrinsic. | ||||
16130 | SDNode *VLD = N->getOperand(0).getNode(); | ||||
16131 | if (VLD->getOpcode() != ISD::INTRINSIC_W_CHAIN) | ||||
16132 | return false; | ||||
16133 | unsigned NumVecs = 0; | ||||
16134 | unsigned NewOpc = 0; | ||||
16135 | unsigned IntNo = cast<ConstantSDNode>(VLD->getOperand(1))->getZExtValue(); | ||||
16136 | if (IntNo == Intrinsic::arm_neon_vld2lane) { | ||||
16137 | NumVecs = 2; | ||||
16138 | NewOpc = ARMISD::VLD2DUP; | ||||
16139 | } else if (IntNo == Intrinsic::arm_neon_vld3lane) { | ||||
16140 | NumVecs = 3; | ||||
16141 | NewOpc = ARMISD::VLD3DUP; | ||||
16142 | } else if (IntNo == Intrinsic::arm_neon_vld4lane) { | ||||
16143 | NumVecs = 4; | ||||
16144 | NewOpc = ARMISD::VLD4DUP; | ||||
16145 | } else { | ||||
16146 | return false; | ||||
16147 | } | ||||
16148 | |||||
16149 | // First check that all the vldN-lane uses are VDUPLANEs and that the lane | ||||
16150 | // numbers match the load. | ||||
16151 | unsigned VLDLaneNo = | ||||
16152 | cast<ConstantSDNode>(VLD->getOperand(NumVecs+3))->getZExtValue(); | ||||
16153 | for (SDNode::use_iterator UI = VLD->use_begin(), UE = VLD->use_end(); | ||||
16154 | UI != UE; ++UI) { | ||||
16155 | // Ignore uses of the chain result. | ||||
16156 | if (UI.getUse().getResNo() == NumVecs) | ||||
16157 | continue; | ||||
16158 | SDNode *User = *UI; | ||||
16159 | if (User->getOpcode() != ARMISD::VDUPLANE || | ||||
16160 | VLDLaneNo != cast<ConstantSDNode>(User->getOperand(1))->getZExtValue()) | ||||
16161 | return false; | ||||
16162 | } | ||||
16163 | |||||
16164 | // Create the vldN-dup node. | ||||
16165 | EVT Tys[5]; | ||||
16166 | unsigned n; | ||||
16167 | for (n = 0; n < NumVecs; ++n) | ||||
16168 | Tys[n] = VT; | ||||
16169 | Tys[n] = MVT::Other; | ||||
16170 | SDVTList SDTys = DAG.getVTList(makeArrayRef(Tys, NumVecs+1)); | ||||
16171 | SDValue Ops[] = { VLD->getOperand(0), VLD->getOperand(2) }; | ||||
16172 | MemIntrinsicSDNode *VLDMemInt = cast<MemIntrinsicSDNode>(VLD); | ||||
16173 | SDValue VLDDup = DAG.getMemIntrinsicNode(NewOpc, SDLoc(VLD), SDTys, | ||||
16174 | Ops, VLDMemInt->getMemoryVT(), | ||||
16175 | VLDMemInt->getMemOperand()); | ||||
16176 | |||||
16177 | // Update the uses. | ||||
16178 | for (SDNode::use_iterator UI = VLD->use_begin(), UE = VLD->use_end(); | ||||
16179 | UI != UE; ++UI) { | ||||
16180 | unsigned ResNo = UI.getUse().getResNo(); | ||||
16181 | // Ignore uses of the chain result. | ||||
16182 | if (ResNo == NumVecs) | ||||
16183 | continue; | ||||
16184 | SDNode *User = *UI; | ||||
16185 | DCI.CombineTo(User, SDValue(VLDDup.getNode(), ResNo)); | ||||
16186 | } | ||||
16187 | |||||
16188 | // Now the vldN-lane intrinsic is dead except for its chain result. | ||||
16189 | // Update uses of the chain. | ||||
16190 | std::vector<SDValue> VLDDupResults; | ||||
16191 | for (unsigned n = 0; n < NumVecs; ++n) | ||||
16192 | VLDDupResults.push_back(SDValue(VLDDup.getNode(), n)); | ||||
16193 | VLDDupResults.push_back(SDValue(VLDDup.getNode(), NumVecs)); | ||||
16194 | DCI.CombineTo(VLD, VLDDupResults); | ||||
16195 | |||||
16196 | return true; | ||||
16197 | } | ||||
16198 | |||||
16199 | /// PerformVDUPLANECombine - Target-specific dag combine xforms for | ||||
16200 | /// ARMISD::VDUPLANE. | ||||
16201 | static SDValue PerformVDUPLANECombine(SDNode *N, | ||||
16202 | TargetLowering::DAGCombinerInfo &DCI, | ||||
16203 | const ARMSubtarget *Subtarget) { | ||||
16204 | SDValue Op = N->getOperand(0); | ||||
16205 | EVT VT = N->getValueType(0); | ||||
16206 | |||||
16207 | // On MVE, we just convert the VDUPLANE to a VDUP with an extract. | ||||
16208 | if (Subtarget->hasMVEIntegerOps()) { | ||||
16209 | EVT ExtractVT = VT.getVectorElementType(); | ||||
16210 | // We need to ensure we are creating a legal type. | ||||
16211 | if (!DCI.DAG.getTargetLoweringInfo().isTypeLegal(ExtractVT)) | ||||
16212 | ExtractVT = MVT::i32; | ||||
16213 | SDValue Extract = DCI.DAG.getNode(ISD::EXTRACT_VECTOR_ELT, SDLoc(N), ExtractVT, | ||||
16214 | N->getOperand(0), N->getOperand(1)); | ||||
16215 | return DCI.DAG.getNode(ARMISD::VDUP, SDLoc(N), VT, Extract); | ||||
16216 | } | ||||
16217 | |||||
16218 | // If the source is a vldN-lane (N > 1) intrinsic, and all the other uses | ||||
16219 | // of that intrinsic are also VDUPLANEs, combine them to a vldN-dup operation. | ||||
16220 | if (CombineVLDDUP(N, DCI)) | ||||
16221 | return SDValue(N, 0); | ||||
16222 | |||||
16223 | // If the source is already a VMOVIMM or VMVNIMM splat, the VDUPLANE is | ||||
16224 | // redundant. Ignore bit_converts for now; element sizes are checked below. | ||||
16225 | while (Op.getOpcode() == ISD::BITCAST) | ||||
16226 | Op = Op.getOperand(0); | ||||
16227 | if (Op.getOpcode() != ARMISD::VMOVIMM && Op.getOpcode() != ARMISD::VMVNIMM) | ||||
16228 | return SDValue(); | ||||
16229 | |||||
16230 | // Make sure the VMOV element size is not bigger than the VDUPLANE elements. | ||||
16231 | unsigned EltSize = Op.getScalarValueSizeInBits(); | ||||
16232 | // The canonical VMOV for a zero vector uses a 32-bit element size. | ||||
16233 | unsigned Imm = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue(); | ||||
16234 | unsigned EltBits; | ||||
16235 | if (ARM_AM::decodeVMOVModImm(Imm, EltBits) == 0) | ||||
16236 | EltSize = 8; | ||||
16237 | if (EltSize > VT.getScalarSizeInBits()) | ||||
16238 | return SDValue(); | ||||
16239 | |||||
16240 | return DCI.DAG.getNode(ISD::BITCAST, SDLoc(N), VT, Op); | ||||
16241 | } | ||||
16242 | |||||
16243 | /// PerformVDUPCombine - Target-specific dag combine xforms for ARMISD::VDUP. | ||||
16244 | static SDValue PerformVDUPCombine(SDNode *N, SelectionDAG &DAG, | ||||
16245 | const ARMSubtarget *Subtarget) { | ||||
16246 | SDValue Op = N->getOperand(0); | ||||
16247 | SDLoc dl(N); | ||||
16248 | |||||
16249 | if (Subtarget->hasMVEIntegerOps()) { | ||||
16250 | // Convert VDUP f32 -> VDUP BITCAST i32 under MVE, as we know the value will | ||||
16251 | // need to come from a GPR. | ||||
16252 | if (Op.getValueType() == MVT::f32) | ||||
16253 | return DAG.getNode(ARMISD::VDUP, dl, N->getValueType(0), | ||||
16254 | DAG.getNode(ISD::BITCAST, dl, MVT::i32, Op)); | ||||
16255 | else if (Op.getValueType() == MVT::f16) | ||||
16256 | return DAG.getNode(ARMISD::VDUP, dl, N->getValueType(0), | ||||
16257 | DAG.getNode(ARMISD::VMOVrh, dl, MVT::i32, Op)); | ||||
16258 | } | ||||
16259 | |||||
16260 | if (!Subtarget->hasNEON()) | ||||
16261 | return SDValue(); | ||||
16262 | |||||
16263 | // Match VDUP(LOAD) -> VLD1DUP. | ||||
16264 | // We match this pattern here rather than waiting for isel because the | ||||
16265 | // transform is only legal for unindexed loads. | ||||
16266 | LoadSDNode *LD = dyn_cast<LoadSDNode>(Op.getNode()); | ||||
16267 | if (LD && Op.hasOneUse() && LD->isUnindexed() && | ||||
16268 | LD->getMemoryVT() == N->getValueType(0).getVectorElementType()) { | ||||
16269 | SDValue Ops[] = {LD->getOperand(0), LD->getOperand(1), | ||||
16270 | DAG.getConstant(LD->getAlignment(), SDLoc(N), MVT::i32)}; | ||||
16271 | SDVTList SDTys = DAG.getVTList(N->getValueType(0), MVT::Other); | ||||
16272 | SDValue VLDDup = | ||||
16273 | DAG.getMemIntrinsicNode(ARMISD::VLD1DUP, SDLoc(N), SDTys, Ops, | ||||
16274 | LD->getMemoryVT(), LD->getMemOperand()); | ||||
16275 | DAG.ReplaceAllUsesOfValueWith(SDValue(LD, 1), VLDDup.getValue(1)); | ||||
16276 | return VLDDup; | ||||
16277 | } | ||||
16278 | |||||
16279 | return SDValue(); | ||||
16280 | } | ||||
16281 | |||||
16282 | static SDValue PerformLOADCombine(SDNode *N, | ||||
16283 | TargetLowering::DAGCombinerInfo &DCI, | ||||
16284 | const ARMSubtarget *Subtarget) { | ||||
16285 | EVT VT = N->getValueType(0); | ||||
16286 | |||||
16287 | // If this is a legal vector load, try to combine it into a VLD1_UPD. | ||||
16288 | if (Subtarget->hasNEON() && ISD::isNormalLoad(N) && VT.isVector() && | ||||
16289 | DCI.DAG.getTargetLoweringInfo().isTypeLegal(VT)) | ||||
16290 | return CombineBaseUpdate(N, DCI); | ||||
16291 | |||||
16292 | return SDValue(); | ||||
16293 | } | ||||
16294 | |||||
16295 | // Optimize trunc store (of multiple scalars) to shuffle and store. First, | ||||
16296 | // pack all of the elements in one place. Next, store to memory in fewer | ||||
16297 | // chunks. | ||||
16298 | static SDValue PerformTruncatingStoreCombine(StoreSDNode *St, | ||||
16299 | SelectionDAG &DAG) { | ||||
16300 | SDValue StVal = St->getValue(); | ||||
16301 | EVT VT = StVal.getValueType(); | ||||
16302 | if (!St->isTruncatingStore() || !VT.isVector()) | ||||
16303 | return SDValue(); | ||||
16304 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | ||||
16305 | EVT StVT = St->getMemoryVT(); | ||||
16306 | unsigned NumElems = VT.getVectorNumElements(); | ||||
16307 | assert(StVT != VT && "Cannot truncate to the same type")(static_cast <bool> (StVT != VT && "Cannot truncate to the same type" ) ? void (0) : __assert_fail ("StVT != VT && \"Cannot truncate to the same type\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 16307, __extension__ __PRETTY_FUNCTION__)); | ||||
16308 | unsigned FromEltSz = VT.getScalarSizeInBits(); | ||||
16309 | unsigned ToEltSz = StVT.getScalarSizeInBits(); | ||||
16310 | |||||
16311 | // From, To sizes and ElemCount must be pow of two | ||||
16312 | if (!isPowerOf2_32(NumElems * FromEltSz * ToEltSz)) | ||||
16313 | return SDValue(); | ||||
16314 | |||||
16315 | // We are going to use the original vector elt for storing. | ||||
16316 | // Accumulated smaller vector elements must be a multiple of the store size. | ||||
16317 | if (0 != (NumElems * FromEltSz) % ToEltSz) | ||||
16318 | return SDValue(); | ||||
16319 | |||||
16320 | unsigned SizeRatio = FromEltSz / ToEltSz; | ||||
16321 | assert(SizeRatio * NumElems * ToEltSz == VT.getSizeInBits())(static_cast <bool> (SizeRatio * NumElems * ToEltSz == VT .getSizeInBits()) ? void (0) : __assert_fail ("SizeRatio * NumElems * ToEltSz == VT.getSizeInBits()" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 16321, __extension__ __PRETTY_FUNCTION__)); | ||||
16322 | |||||
16323 | // Create a type on which we perform the shuffle. | ||||
16324 | EVT WideVecVT = EVT::getVectorVT(*DAG.getContext(), StVT.getScalarType(), | ||||
16325 | NumElems * SizeRatio); | ||||
16326 | assert(WideVecVT.getSizeInBits() == VT.getSizeInBits())(static_cast <bool> (WideVecVT.getSizeInBits() == VT.getSizeInBits ()) ? void (0) : __assert_fail ("WideVecVT.getSizeInBits() == VT.getSizeInBits()" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 16326, __extension__ __PRETTY_FUNCTION__)); | ||||
16327 | |||||
16328 | SDLoc DL(St); | ||||
16329 | SDValue WideVec = DAG.getNode(ISD::BITCAST, DL, WideVecVT, StVal); | ||||
16330 | SmallVector<int, 8> ShuffleVec(NumElems * SizeRatio, -1); | ||||
16331 | for (unsigned i = 0; i < NumElems; ++i) | ||||
16332 | ShuffleVec[i] = DAG.getDataLayout().isBigEndian() ? (i + 1) * SizeRatio - 1 | ||||
16333 | : i * SizeRatio; | ||||
16334 | |||||
16335 | // Can't shuffle using an illegal type. | ||||
16336 | if (!TLI.isTypeLegal(WideVecVT)) | ||||
16337 | return SDValue(); | ||||
16338 | |||||
16339 | SDValue Shuff = DAG.getVectorShuffle( | ||||
16340 | WideVecVT, DL, WideVec, DAG.getUNDEF(WideVec.getValueType()), ShuffleVec); | ||||
16341 | // At this point all of the data is stored at the bottom of the | ||||
16342 | // register. We now need to save it to mem. | ||||
16343 | |||||
16344 | // Find the largest store unit | ||||
16345 | MVT StoreType = MVT::i8; | ||||
16346 | for (MVT Tp : MVT::integer_valuetypes()) { | ||||
16347 | if (TLI.isTypeLegal(Tp) && Tp.getSizeInBits() <= NumElems * ToEltSz) | ||||
16348 | StoreType = Tp; | ||||
16349 | } | ||||
16350 | // Didn't find a legal store type. | ||||
16351 | if (!TLI.isTypeLegal(StoreType)) | ||||
16352 | return SDValue(); | ||||
16353 | |||||
16354 | // Bitcast the original vector into a vector of store-size units | ||||
16355 | EVT StoreVecVT = | ||||
16356 | EVT::getVectorVT(*DAG.getContext(), StoreType, | ||||
16357 | VT.getSizeInBits() / EVT(StoreType).getSizeInBits()); | ||||
16358 | assert(StoreVecVT.getSizeInBits() == VT.getSizeInBits())(static_cast <bool> (StoreVecVT.getSizeInBits() == VT.getSizeInBits ()) ? void (0) : __assert_fail ("StoreVecVT.getSizeInBits() == VT.getSizeInBits()" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 16358, __extension__ __PRETTY_FUNCTION__)); | ||||
16359 | SDValue ShuffWide = DAG.getNode(ISD::BITCAST, DL, StoreVecVT, Shuff); | ||||
16360 | SmallVector<SDValue, 8> Chains; | ||||
16361 | SDValue Increment = DAG.getConstant(StoreType.getSizeInBits() / 8, DL, | ||||
16362 | TLI.getPointerTy(DAG.getDataLayout())); | ||||
16363 | SDValue BasePtr = St->getBasePtr(); | ||||
16364 | |||||
16365 | // Perform one or more big stores into memory. | ||||
16366 | unsigned E = (ToEltSz * NumElems) / StoreType.getSizeInBits(); | ||||
16367 | for (unsigned I = 0; I < E; I++) { | ||||
16368 | SDValue SubVec = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, StoreType, | ||||
16369 | ShuffWide, DAG.getIntPtrConstant(I, DL)); | ||||
16370 | SDValue Ch = | ||||
16371 | DAG.getStore(St->getChain(), DL, SubVec, BasePtr, St->getPointerInfo(), | ||||
16372 | St->getAlignment(), St->getMemOperand()->getFlags()); | ||||
16373 | BasePtr = | ||||
16374 | DAG.getNode(ISD::ADD, DL, BasePtr.getValueType(), BasePtr, Increment); | ||||
16375 | Chains.push_back(Ch); | ||||
16376 | } | ||||
16377 | return DAG.getNode(ISD::TokenFactor, DL, MVT::Other, Chains); | ||||
16378 | } | ||||
16379 | |||||
16380 | // Try taking a single vector store from an fpround (which would otherwise turn | ||||
16381 | // into an expensive buildvector) and splitting it into a series of narrowing | ||||
16382 | // stores. | ||||
16383 | static SDValue PerformSplittingToNarrowingStores(StoreSDNode *St, | ||||
16384 | SelectionDAG &DAG) { | ||||
16385 | if (!St->isSimple() || St->isTruncatingStore() || !St->isUnindexed()) | ||||
16386 | return SDValue(); | ||||
16387 | SDValue Trunc = St->getValue(); | ||||
16388 | if (Trunc->getOpcode() != ISD::FP_ROUND) | ||||
16389 | return SDValue(); | ||||
16390 | EVT FromVT = Trunc->getOperand(0).getValueType(); | ||||
16391 | EVT ToVT = Trunc.getValueType(); | ||||
16392 | if (!ToVT.isVector()) | ||||
16393 | return SDValue(); | ||||
16394 | assert(FromVT.getVectorNumElements() == ToVT.getVectorNumElements())(static_cast <bool> (FromVT.getVectorNumElements() == ToVT .getVectorNumElements()) ? void (0) : __assert_fail ("FromVT.getVectorNumElements() == ToVT.getVectorNumElements()" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 16394, __extension__ __PRETTY_FUNCTION__)); | ||||
16395 | EVT ToEltVT = ToVT.getVectorElementType(); | ||||
16396 | EVT FromEltVT = FromVT.getVectorElementType(); | ||||
16397 | |||||
16398 | if (FromEltVT != MVT::f32 || ToEltVT != MVT::f16) | ||||
16399 | return SDValue(); | ||||
16400 | |||||
16401 | unsigned NumElements = 4; | ||||
16402 | if (FromVT.getVectorNumElements() % NumElements != 0) | ||||
16403 | return SDValue(); | ||||
16404 | |||||
16405 | // Test if the Trunc will be convertable to a VMOVN with a shuffle, and if so | ||||
16406 | // use the VMOVN over splitting the store. We are looking for patterns of: | ||||
16407 | // !rev: 0 N 1 N+1 2 N+2 ... | ||||
16408 | // rev: N 0 N+1 1 N+2 2 ... | ||||
16409 | // The shuffle may either be a single source (in which case N = NumElts/2) or | ||||
16410 | // two inputs extended with concat to the same size (in which case N = | ||||
16411 | // NumElts). | ||||
16412 | auto isVMOVNShuffle = [&](ShuffleVectorSDNode *SVN, bool Rev) { | ||||
16413 | ArrayRef<int> M = SVN->getMask(); | ||||
16414 | unsigned NumElts = ToVT.getVectorNumElements(); | ||||
16415 | if (SVN->getOperand(1).isUndef()) | ||||
16416 | NumElts /= 2; | ||||
16417 | |||||
16418 | unsigned Off0 = Rev ? NumElts : 0; | ||||
16419 | unsigned Off1 = Rev ? 0 : NumElts; | ||||
16420 | |||||
16421 | for (unsigned I = 0; I < NumElts; I += 2) { | ||||
16422 | if (M[I] >= 0 && M[I] != (int)(Off0 + I / 2)) | ||||
16423 | return false; | ||||
16424 | if (M[I + 1] >= 0 && M[I + 1] != (int)(Off1 + I / 2)) | ||||
16425 | return false; | ||||
16426 | } | ||||
16427 | |||||
16428 | return true; | ||||
16429 | }; | ||||
16430 | |||||
16431 | if (auto *Shuffle = dyn_cast<ShuffleVectorSDNode>(Trunc.getOperand(0))) | ||||
16432 | if (isVMOVNShuffle(Shuffle, false) || isVMOVNShuffle(Shuffle, true)) | ||||
16433 | return SDValue(); | ||||
16434 | |||||
16435 | LLVMContext &C = *DAG.getContext(); | ||||
16436 | SDLoc DL(St); | ||||
16437 | // Details about the old store | ||||
16438 | SDValue Ch = St->getChain(); | ||||
16439 | SDValue BasePtr = St->getBasePtr(); | ||||
16440 | Align Alignment = St->getOriginalAlign(); | ||||
16441 | MachineMemOperand::Flags MMOFlags = St->getMemOperand()->getFlags(); | ||||
16442 | AAMDNodes AAInfo = St->getAAInfo(); | ||||
16443 | |||||
16444 | // We split the store into slices of NumElements. fp16 trunc stores are vcvt | ||||
16445 | // and then stored as truncating integer stores. | ||||
16446 | EVT NewFromVT = EVT::getVectorVT(C, FromEltVT, NumElements); | ||||
16447 | EVT NewToVT = EVT::getVectorVT( | ||||
16448 | C, EVT::getIntegerVT(C, ToEltVT.getSizeInBits()), NumElements); | ||||
16449 | |||||
16450 | SmallVector<SDValue, 4> Stores; | ||||
16451 | for (unsigned i = 0; i < FromVT.getVectorNumElements() / NumElements; i++) { | ||||
16452 | unsigned NewOffset = i * NumElements * ToEltVT.getSizeInBits() / 8; | ||||
16453 | SDValue NewPtr = | ||||
16454 | DAG.getObjectPtrOffset(DL, BasePtr, TypeSize::Fixed(NewOffset)); | ||||
16455 | |||||
16456 | SDValue Extract = | ||||
16457 | DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, NewFromVT, Trunc.getOperand(0), | ||||
16458 | DAG.getConstant(i * NumElements, DL, MVT::i32)); | ||||
16459 | |||||
16460 | SDValue FPTrunc = | ||||
16461 | DAG.getNode(ARMISD::VCVTN, DL, MVT::v8f16, DAG.getUNDEF(MVT::v8f16), | ||||
16462 | Extract, DAG.getConstant(0, DL, MVT::i32)); | ||||
16463 | Extract = DAG.getNode(ARMISD::VECTOR_REG_CAST, DL, MVT::v4i32, FPTrunc); | ||||
16464 | |||||
16465 | SDValue Store = DAG.getTruncStore( | ||||
16466 | Ch, DL, Extract, NewPtr, St->getPointerInfo().getWithOffset(NewOffset), | ||||
16467 | NewToVT, Alignment.value(), MMOFlags, AAInfo); | ||||
16468 | Stores.push_back(Store); | ||||
16469 | } | ||||
16470 | return DAG.getNode(ISD::TokenFactor, DL, MVT::Other, Stores); | ||||
16471 | } | ||||
16472 | |||||
16473 | // Try taking a single vector store from an MVETRUNC (which would otherwise turn | ||||
16474 | // into an expensive buildvector) and splitting it into a series of narrowing | ||||
16475 | // stores. | ||||
16476 | static SDValue PerformSplittingMVETruncToNarrowingStores(StoreSDNode *St, | ||||
16477 | SelectionDAG &DAG) { | ||||
16478 | if (!St->isSimple() || St->isTruncatingStore() || !St->isUnindexed()) | ||||
16479 | return SDValue(); | ||||
16480 | SDValue Trunc = St->getValue(); | ||||
16481 | if (Trunc->getOpcode() != ARMISD::MVETRUNC) | ||||
16482 | return SDValue(); | ||||
16483 | EVT FromVT = Trunc->getOperand(0).getValueType(); | ||||
16484 | EVT ToVT = Trunc.getValueType(); | ||||
16485 | |||||
16486 | LLVMContext &C = *DAG.getContext(); | ||||
16487 | SDLoc DL(St); | ||||
16488 | // Details about the old store | ||||
16489 | SDValue Ch = St->getChain(); | ||||
16490 | SDValue BasePtr = St->getBasePtr(); | ||||
16491 | Align Alignment = St->getOriginalAlign(); | ||||
16492 | MachineMemOperand::Flags MMOFlags = St->getMemOperand()->getFlags(); | ||||
16493 | AAMDNodes AAInfo = St->getAAInfo(); | ||||
16494 | |||||
16495 | EVT NewToVT = EVT::getVectorVT(C, ToVT.getVectorElementType(), | ||||
16496 | FromVT.getVectorNumElements()); | ||||
16497 | |||||
16498 | SmallVector<SDValue, 4> Stores; | ||||
16499 | for (unsigned i = 0; i < Trunc.getNumOperands(); i++) { | ||||
16500 | unsigned NewOffset = | ||||
16501 | i * FromVT.getVectorNumElements() * ToVT.getScalarSizeInBits() / 8; | ||||
16502 | SDValue NewPtr = | ||||
16503 | DAG.getObjectPtrOffset(DL, BasePtr, TypeSize::Fixed(NewOffset)); | ||||
16504 | |||||
16505 | SDValue Extract = Trunc.getOperand(i); | ||||
16506 | SDValue Store = DAG.getTruncStore( | ||||
16507 | Ch, DL, Extract, NewPtr, St->getPointerInfo().getWithOffset(NewOffset), | ||||
16508 | NewToVT, Alignment.value(), MMOFlags, AAInfo); | ||||
16509 | Stores.push_back(Store); | ||||
16510 | } | ||||
16511 | return DAG.getNode(ISD::TokenFactor, DL, MVT::Other, Stores); | ||||
16512 | } | ||||
16513 | |||||
16514 | // Given a floating point store from an extracted vector, with an integer | ||||
16515 | // VGETLANE that already exists, store the existing VGETLANEu directly. This can | ||||
16516 | // help reduce fp register pressure, doesn't require the fp extract and allows | ||||
16517 | // use of more integer post-inc stores not available with vstr. | ||||
16518 | static SDValue PerformExtractFpToIntStores(StoreSDNode *St, SelectionDAG &DAG) { | ||||
16519 | if (!St->isSimple() || St->isTruncatingStore() || !St->isUnindexed()) | ||||
16520 | return SDValue(); | ||||
16521 | SDValue Extract = St->getValue(); | ||||
16522 | EVT VT = Extract.getValueType(); | ||||
16523 | // For now only uses f16. This may be useful for f32 too, but that will | ||||
16524 | // be bitcast(extract), not the VGETLANEu we currently check here. | ||||
16525 | if (VT != MVT::f16 || Extract->getOpcode() != ISD::EXTRACT_VECTOR_ELT) | ||||
16526 | return SDValue(); | ||||
16527 | |||||
16528 | SDNode *GetLane = | ||||
16529 | DAG.getNodeIfExists(ARMISD::VGETLANEu, DAG.getVTList(MVT::i32), | ||||
16530 | {Extract.getOperand(0), Extract.getOperand(1)}); | ||||
16531 | if (!GetLane) | ||||
16532 | return SDValue(); | ||||
16533 | |||||
16534 | LLVMContext &C = *DAG.getContext(); | ||||
16535 | SDLoc DL(St); | ||||
16536 | // Create a new integer store to replace the existing floating point version. | ||||
16537 | SDValue Ch = St->getChain(); | ||||
16538 | SDValue BasePtr = St->getBasePtr(); | ||||
16539 | Align Alignment = St->getOriginalAlign(); | ||||
16540 | MachineMemOperand::Flags MMOFlags = St->getMemOperand()->getFlags(); | ||||
16541 | AAMDNodes AAInfo = St->getAAInfo(); | ||||
16542 | EVT NewToVT = EVT::getIntegerVT(C, VT.getSizeInBits()); | ||||
16543 | SDValue Store = DAG.getTruncStore(Ch, DL, SDValue(GetLane, 0), BasePtr, | ||||
16544 | St->getPointerInfo(), NewToVT, | ||||
16545 | Alignment.value(), MMOFlags, AAInfo); | ||||
16546 | |||||
16547 | return Store; | ||||
16548 | } | ||||
16549 | |||||
16550 | /// PerformSTORECombine - Target-specific dag combine xforms for | ||||
16551 | /// ISD::STORE. | ||||
16552 | static SDValue PerformSTORECombine(SDNode *N, | ||||
16553 | TargetLowering::DAGCombinerInfo &DCI, | ||||
16554 | const ARMSubtarget *Subtarget) { | ||||
16555 | StoreSDNode *St = cast<StoreSDNode>(N); | ||||
16556 | if (St->isVolatile()) | ||||
16557 | return SDValue(); | ||||
16558 | SDValue StVal = St->getValue(); | ||||
16559 | EVT VT = StVal.getValueType(); | ||||
16560 | |||||
16561 | if (Subtarget->hasNEON()) | ||||
16562 | if (SDValue Store = PerformTruncatingStoreCombine(St, DCI.DAG)) | ||||
16563 | return Store; | ||||
16564 | |||||
16565 | if (Subtarget->hasMVEIntegerOps()) { | ||||
16566 | if (SDValue NewToken = PerformSplittingToNarrowingStores(St, DCI.DAG)) | ||||
16567 | return NewToken; | ||||
16568 | if (SDValue NewChain = PerformExtractFpToIntStores(St, DCI.DAG)) | ||||
16569 | return NewChain; | ||||
16570 | if (SDValue NewToken = | ||||
16571 | PerformSplittingMVETruncToNarrowingStores(St, DCI.DAG)) | ||||
16572 | return NewToken; | ||||
16573 | } | ||||
16574 | |||||
16575 | if (!ISD::isNormalStore(St)) | ||||
16576 | return SDValue(); | ||||
16577 | |||||
16578 | // Split a store of a VMOVDRR into two integer stores to avoid mixing NEON and | ||||
16579 | // ARM stores of arguments in the same cache line. | ||||
16580 | if (StVal.getNode()->getOpcode() == ARMISD::VMOVDRR && | ||||
16581 | StVal.getNode()->hasOneUse()) { | ||||
16582 | SelectionDAG &DAG = DCI.DAG; | ||||
16583 | bool isBigEndian = DAG.getDataLayout().isBigEndian(); | ||||
16584 | SDLoc DL(St); | ||||
16585 | SDValue BasePtr = St->getBasePtr(); | ||||
16586 | SDValue NewST1 = DAG.getStore( | ||||
16587 | St->getChain(), DL, StVal.getNode()->getOperand(isBigEndian ? 1 : 0), | ||||
16588 | BasePtr, St->getPointerInfo(), St->getOriginalAlign(), | ||||
16589 | St->getMemOperand()->getFlags()); | ||||
16590 | |||||
16591 | SDValue OffsetPtr = DAG.getNode(ISD::ADD, DL, MVT::i32, BasePtr, | ||||
16592 | DAG.getConstant(4, DL, MVT::i32)); | ||||
16593 | return DAG.getStore(NewST1.getValue(0), DL, | ||||
16594 | StVal.getNode()->getOperand(isBigEndian ? 0 : 1), | ||||
16595 | OffsetPtr, St->getPointerInfo().getWithOffset(4), | ||||
16596 | St->getOriginalAlign(), | ||||
16597 | St->getMemOperand()->getFlags()); | ||||
16598 | } | ||||
16599 | |||||
16600 | if (StVal.getValueType() == MVT::i64 && | ||||
16601 | StVal.getNode()->getOpcode() == ISD::EXTRACT_VECTOR_ELT) { | ||||
16602 | |||||
16603 | // Bitcast an i64 store extracted from a vector to f64. | ||||
16604 | // Otherwise, the i64 value will be legalized to a pair of i32 values. | ||||
16605 | SelectionDAG &DAG = DCI.DAG; | ||||
16606 | SDLoc dl(StVal); | ||||
16607 | SDValue IntVec = StVal.getOperand(0); | ||||
16608 | EVT FloatVT = EVT::getVectorVT(*DAG.getContext(), MVT::f64, | ||||
16609 | IntVec.getValueType().getVectorNumElements()); | ||||
16610 | SDValue Vec = DAG.getNode(ISD::BITCAST, dl, FloatVT, IntVec); | ||||
16611 | SDValue ExtElt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, | ||||
16612 | Vec, StVal.getOperand(1)); | ||||
16613 | dl = SDLoc(N); | ||||
16614 | SDValue V = DAG.getNode(ISD::BITCAST, dl, MVT::i64, ExtElt); | ||||
16615 | // Make the DAGCombiner fold the bitcasts. | ||||
16616 | DCI.AddToWorklist(Vec.getNode()); | ||||
16617 | DCI.AddToWorklist(ExtElt.getNode()); | ||||
16618 | DCI.AddToWorklist(V.getNode()); | ||||
16619 | return DAG.getStore(St->getChain(), dl, V, St->getBasePtr(), | ||||
16620 | St->getPointerInfo(), St->getAlignment(), | ||||
16621 | St->getMemOperand()->getFlags(), St->getAAInfo()); | ||||
16622 | } | ||||
16623 | |||||
16624 | // If this is a legal vector store, try to combine it into a VST1_UPD. | ||||
16625 | if (Subtarget->hasNEON() && ISD::isNormalStore(N) && VT.isVector() && | ||||
16626 | DCI.DAG.getTargetLoweringInfo().isTypeLegal(VT)) | ||||
16627 | return CombineBaseUpdate(N, DCI); | ||||
16628 | |||||
16629 | return SDValue(); | ||||
16630 | } | ||||
16631 | |||||
16632 | /// PerformVCVTCombine - VCVT (floating-point to fixed-point, Advanced SIMD) | ||||
16633 | /// can replace combinations of VMUL and VCVT (floating-point to integer) | ||||
16634 | /// when the VMUL has a constant operand that is a power of 2. | ||||
16635 | /// | ||||
16636 | /// Example (assume d17 = <float 8.000000e+00, float 8.000000e+00>): | ||||
16637 | /// vmul.f32 d16, d17, d16 | ||||
16638 | /// vcvt.s32.f32 d16, d16 | ||||
16639 | /// becomes: | ||||
16640 | /// vcvt.s32.f32 d16, d16, #3 | ||||
16641 | static SDValue PerformVCVTCombine(SDNode *N, SelectionDAG &DAG, | ||||
16642 | const ARMSubtarget *Subtarget) { | ||||
16643 | if (!Subtarget->hasNEON()) | ||||
16644 | return SDValue(); | ||||
16645 | |||||
16646 | SDValue Op = N->getOperand(0); | ||||
16647 | if (!Op.getValueType().isVector() || !Op.getValueType().isSimple() || | ||||
16648 | Op.getOpcode() != ISD::FMUL) | ||||
16649 | return SDValue(); | ||||
16650 | |||||
16651 | SDValue ConstVec = Op->getOperand(1); | ||||
16652 | if (!isa<BuildVectorSDNode>(ConstVec)) | ||||
16653 | return SDValue(); | ||||
16654 | |||||
16655 | MVT FloatTy = Op.getSimpleValueType().getVectorElementType(); | ||||
16656 | uint32_t FloatBits = FloatTy.getSizeInBits(); | ||||
16657 | MVT IntTy = N->getSimpleValueType(0).getVectorElementType(); | ||||
16658 | uint32_t IntBits = IntTy.getSizeInBits(); | ||||
16659 | unsigned NumLanes = Op.getValueType().getVectorNumElements(); | ||||
16660 | if (FloatBits != 32 || IntBits > 32 || (NumLanes != 4 && NumLanes != 2)) { | ||||
16661 | // These instructions only exist converting from f32 to i32. We can handle | ||||
16662 | // smaller integers by generating an extra truncate, but larger ones would | ||||
16663 | // be lossy. We also can't handle anything other than 2 or 4 lanes, since | ||||
16664 | // these intructions only support v2i32/v4i32 types. | ||||
16665 | return SDValue(); | ||||
16666 | } | ||||
16667 | |||||
16668 | BitVector UndefElements; | ||||
16669 | BuildVectorSDNode *BV = cast<BuildVectorSDNode>(ConstVec); | ||||
16670 | int32_t C = BV->getConstantFPSplatPow2ToLog2Int(&UndefElements, 33); | ||||
16671 | if (C == -1 || C == 0 || C > 32) | ||||
16672 | return SDValue(); | ||||
16673 | |||||
16674 | SDLoc dl(N); | ||||
16675 | bool isSigned = N->getOpcode() == ISD::FP_TO_SINT; | ||||
16676 | unsigned IntrinsicOpcode = isSigned ? Intrinsic::arm_neon_vcvtfp2fxs : | ||||
16677 | Intrinsic::arm_neon_vcvtfp2fxu; | ||||
16678 | SDValue FixConv = DAG.getNode( | ||||
16679 | ISD::INTRINSIC_WO_CHAIN, dl, NumLanes == 2 ? MVT::v2i32 : MVT::v4i32, | ||||
16680 | DAG.getConstant(IntrinsicOpcode, dl, MVT::i32), Op->getOperand(0), | ||||
16681 | DAG.getConstant(C, dl, MVT::i32)); | ||||
16682 | |||||
16683 | if (IntBits < FloatBits) | ||||
16684 | FixConv = DAG.getNode(ISD::TRUNCATE, dl, N->getValueType(0), FixConv); | ||||
16685 | |||||
16686 | return FixConv; | ||||
16687 | } | ||||
16688 | |||||
16689 | static SDValue PerformFAddVSelectCombine(SDNode *N, SelectionDAG &DAG, | ||||
16690 | const ARMSubtarget *Subtarget) { | ||||
16691 | if (!Subtarget->hasMVEFloatOps()) | ||||
16692 | return SDValue(); | ||||
16693 | |||||
16694 | // Turn (fadd x, (vselect c, y, -0.0)) into (vselect c, (fadd x, y), x) | ||||
16695 | // The second form can be more easily turned into a predicated vadd, and | ||||
16696 | // possibly combined into a fma to become a predicated vfma. | ||||
16697 | SDValue Op0 = N->getOperand(0); | ||||
16698 | SDValue Op1 = N->getOperand(1); | ||||
16699 | EVT VT = N->getValueType(0); | ||||
16700 | SDLoc DL(N); | ||||
16701 | |||||
16702 | // The identity element for a fadd is -0.0, which these VMOV's represent. | ||||
16703 | auto isNegativeZeroSplat = [&](SDValue Op) { | ||||
16704 | if (Op.getOpcode() != ISD::BITCAST || | ||||
16705 | Op.getOperand(0).getOpcode() != ARMISD::VMOVIMM) | ||||
16706 | return false; | ||||
16707 | if (VT == MVT::v4f32 && Op.getOperand(0).getConstantOperandVal(0) == 1664) | ||||
16708 | return true; | ||||
16709 | if (VT == MVT::v8f16 && Op.getOperand(0).getConstantOperandVal(0) == 2688) | ||||
16710 | return true; | ||||
16711 | return false; | ||||
16712 | }; | ||||
16713 | |||||
16714 | if (Op0.getOpcode() == ISD::VSELECT && Op1.getOpcode() != ISD::VSELECT) | ||||
16715 | std::swap(Op0, Op1); | ||||
16716 | |||||
16717 | if (Op1.getOpcode() != ISD::VSELECT || | ||||
16718 | !isNegativeZeroSplat(Op1.getOperand(2))) | ||||
16719 | return SDValue(); | ||||
16720 | SDValue FAdd = | ||||
16721 | DAG.getNode(ISD::FADD, DL, VT, Op0, Op1.getOperand(1), N->getFlags()); | ||||
16722 | return DAG.getNode(ISD::VSELECT, DL, VT, Op1.getOperand(0), FAdd, Op0); | ||||
16723 | } | ||||
16724 | |||||
16725 | /// PerformVDIVCombine - VCVT (fixed-point to floating-point, Advanced SIMD) | ||||
16726 | /// can replace combinations of VCVT (integer to floating-point) and VDIV | ||||
16727 | /// when the VDIV has a constant operand that is a power of 2. | ||||
16728 | /// | ||||
16729 | /// Example (assume d17 = <float 8.000000e+00, float 8.000000e+00>): | ||||
16730 | /// vcvt.f32.s32 d16, d16 | ||||
16731 | /// vdiv.f32 d16, d17, d16 | ||||
16732 | /// becomes: | ||||
16733 | /// vcvt.f32.s32 d16, d16, #3 | ||||
16734 | static SDValue PerformVDIVCombine(SDNode *N, SelectionDAG &DAG, | ||||
16735 | const ARMSubtarget *Subtarget) { | ||||
16736 | if (!Subtarget->hasNEON()) | ||||
16737 | return SDValue(); | ||||
16738 | |||||
16739 | SDValue Op = N->getOperand(0); | ||||
16740 | unsigned OpOpcode = Op.getNode()->getOpcode(); | ||||
16741 | if (!N->getValueType(0).isVector() || !N->getValueType(0).isSimple() || | ||||
16742 | (OpOpcode != ISD::SINT_TO_FP && OpOpcode != ISD::UINT_TO_FP)) | ||||
16743 | return SDValue(); | ||||
16744 | |||||
16745 | SDValue ConstVec = N->getOperand(1); | ||||
16746 | if (!isa<BuildVectorSDNode>(ConstVec)) | ||||
16747 | return SDValue(); | ||||
16748 | |||||
16749 | MVT FloatTy = N->getSimpleValueType(0).getVectorElementType(); | ||||
16750 | uint32_t FloatBits = FloatTy.getSizeInBits(); | ||||
16751 | MVT IntTy = Op.getOperand(0).getSimpleValueType().getVectorElementType(); | ||||
16752 | uint32_t IntBits = IntTy.getSizeInBits(); | ||||
16753 | unsigned NumLanes = Op.getValueType().getVectorNumElements(); | ||||
16754 | if (FloatBits != 32 || IntBits > 32 || (NumLanes != 4 && NumLanes != 2)) { | ||||
16755 | // These instructions only exist converting from i32 to f32. We can handle | ||||
16756 | // smaller integers by generating an extra extend, but larger ones would | ||||
16757 | // be lossy. We also can't handle anything other than 2 or 4 lanes, since | ||||
16758 | // these intructions only support v2i32/v4i32 types. | ||||
16759 | return SDValue(); | ||||
16760 | } | ||||
16761 | |||||
16762 | BitVector UndefElements; | ||||
16763 | BuildVectorSDNode *BV = cast<BuildVectorSDNode>(ConstVec); | ||||
16764 | int32_t C = BV->getConstantFPSplatPow2ToLog2Int(&UndefElements, 33); | ||||
16765 | if (C == -1 || C == 0 || C > 32) | ||||
16766 | return SDValue(); | ||||
16767 | |||||
16768 | SDLoc dl(N); | ||||
16769 | bool isSigned = OpOpcode == ISD::SINT_TO_FP; | ||||
16770 | SDValue ConvInput = Op.getOperand(0); | ||||
16771 | if (IntBits < FloatBits) | ||||
16772 | ConvInput = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, | ||||
16773 | dl, NumLanes == 2 ? MVT::v2i32 : MVT::v4i32, | ||||
16774 | ConvInput); | ||||
16775 | |||||
16776 | unsigned IntrinsicOpcode = isSigned ? Intrinsic::arm_neon_vcvtfxs2fp : | ||||
16777 | Intrinsic::arm_neon_vcvtfxu2fp; | ||||
16778 | return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, | ||||
16779 | Op.getValueType(), | ||||
16780 | DAG.getConstant(IntrinsicOpcode, dl, MVT::i32), | ||||
16781 | ConvInput, DAG.getConstant(C, dl, MVT::i32)); | ||||
16782 | } | ||||
16783 | |||||
16784 | static SDValue PerformVECREDUCE_ADDCombine(SDNode *N, SelectionDAG &DAG, | ||||
16785 | const ARMSubtarget *ST) { | ||||
16786 | if (!ST->hasMVEIntegerOps()) | ||||
16787 | return SDValue(); | ||||
16788 | |||||
16789 | assert(N->getOpcode() == ISD::VECREDUCE_ADD)(static_cast <bool> (N->getOpcode() == ISD::VECREDUCE_ADD ) ? void (0) : __assert_fail ("N->getOpcode() == ISD::VECREDUCE_ADD" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 16789, __extension__ __PRETTY_FUNCTION__)); | ||||
16790 | EVT ResVT = N->getValueType(0); | ||||
16791 | SDValue N0 = N->getOperand(0); | ||||
16792 | SDLoc dl(N); | ||||
16793 | |||||
16794 | // Try to turn vecreduce_add(add(x, y)) into vecreduce(x) + vecreduce(y) | ||||
16795 | if (ResVT == MVT::i32 && N0.getOpcode() == ISD::ADD && | ||||
16796 | (N0.getValueType() == MVT::v4i32 || N0.getValueType() == MVT::v8i16 || | ||||
16797 | N0.getValueType() == MVT::v16i8)) { | ||||
16798 | SDValue Red0 = DAG.getNode(ISD::VECREDUCE_ADD, dl, ResVT, N0.getOperand(0)); | ||||
16799 | SDValue Red1 = DAG.getNode(ISD::VECREDUCE_ADD, dl, ResVT, N0.getOperand(1)); | ||||
16800 | return DAG.getNode(ISD::ADD, dl, ResVT, Red0, Red1); | ||||
16801 | } | ||||
16802 | |||||
16803 | // We are looking for something that will have illegal types if left alone, | ||||
16804 | // but that we can convert to a single instruction under MVE. For example | ||||
16805 | // vecreduce_add(sext(A, v8i32)) => VADDV.s16 A | ||||
16806 | // or | ||||
16807 | // vecreduce_add(mul(zext(A, v16i32), zext(B, v16i32))) => VMLADAV.u8 A, B | ||||
16808 | |||||
16809 | // The legal cases are: | ||||
16810 | // VADDV u/s 8/16/32 | ||||
16811 | // VMLAV u/s 8/16/32 | ||||
16812 | // VADDLV u/s 32 | ||||
16813 | // VMLALV u/s 16/32 | ||||
16814 | |||||
16815 | // If the input vector is smaller than legal (v4i8/v4i16 for example) we can | ||||
16816 | // extend it and use v4i32 instead. | ||||
16817 | auto ExtTypeMatches = [](SDValue A, ArrayRef<MVT> ExtTypes) { | ||||
16818 | EVT AVT = A.getValueType(); | ||||
16819 | return any_of(ExtTypes, [&](MVT Ty) { | ||||
16820 | return AVT.getVectorNumElements() == Ty.getVectorNumElements() && | ||||
16821 | AVT.bitsLE(Ty); | ||||
16822 | }); | ||||
16823 | }; | ||||
16824 | auto ExtendIfNeeded = [&](SDValue A, unsigned ExtendCode) { | ||||
16825 | EVT AVT = A.getValueType(); | ||||
16826 | if (!AVT.is128BitVector()) | ||||
16827 | A = DAG.getNode(ExtendCode, dl, | ||||
16828 | AVT.changeVectorElementType(MVT::getIntegerVT( | ||||
16829 | 128 / AVT.getVectorMinNumElements())), | ||||
16830 | A); | ||||
16831 | return A; | ||||
16832 | }; | ||||
16833 | auto IsVADDV = [&](MVT RetTy, unsigned ExtendCode, ArrayRef<MVT> ExtTypes) { | ||||
16834 | if (ResVT != RetTy || N0->getOpcode() != ExtendCode) | ||||
16835 | return SDValue(); | ||||
16836 | SDValue A = N0->getOperand(0); | ||||
16837 | if (ExtTypeMatches(A, ExtTypes)) | ||||
16838 | return ExtendIfNeeded(A, ExtendCode); | ||||
16839 | return SDValue(); | ||||
16840 | }; | ||||
16841 | auto IsPredVADDV = [&](MVT RetTy, unsigned ExtendCode, | ||||
16842 | ArrayRef<MVT> ExtTypes, SDValue &Mask) { | ||||
16843 | if (ResVT != RetTy || N0->getOpcode() != ISD::VSELECT || | ||||
16844 | !ISD::isBuildVectorAllZeros(N0->getOperand(2).getNode())) | ||||
16845 | return SDValue(); | ||||
16846 | Mask = N0->getOperand(0); | ||||
16847 | SDValue Ext = N0->getOperand(1); | ||||
16848 | if (Ext->getOpcode() != ExtendCode) | ||||
16849 | return SDValue(); | ||||
16850 | SDValue A = Ext->getOperand(0); | ||||
16851 | if (ExtTypeMatches(A, ExtTypes)) | ||||
16852 | return ExtendIfNeeded(A, ExtendCode); | ||||
16853 | return SDValue(); | ||||
16854 | }; | ||||
16855 | auto IsVMLAV = [&](MVT RetTy, unsigned ExtendCode, ArrayRef<MVT> ExtTypes, | ||||
16856 | SDValue &A, SDValue &B) { | ||||
16857 | // For a vmla we are trying to match a larger pattern: | ||||
16858 | // ExtA = sext/zext A | ||||
16859 | // ExtB = sext/zext B | ||||
16860 | // Mul = mul ExtA, ExtB | ||||
16861 | // vecreduce.add Mul | ||||
16862 | // There might also be en extra extend between the mul and the addreduce, so | ||||
16863 | // long as the bitwidth is high enough to make them equivalent (for example | ||||
16864 | // original v8i16 might be mul at v8i32 and the reduce happens at v8i64). | ||||
16865 | if (ResVT != RetTy) | ||||
16866 | return false; | ||||
16867 | SDValue Mul = N0; | ||||
16868 | if (Mul->getOpcode() == ExtendCode && | ||||
16869 | Mul->getOperand(0).getScalarValueSizeInBits() * 2 >= | ||||
16870 | ResVT.getScalarSizeInBits()) | ||||
16871 | Mul = Mul->getOperand(0); | ||||
16872 | if (Mul->getOpcode() != ISD::MUL) | ||||
16873 | return false; | ||||
16874 | SDValue ExtA = Mul->getOperand(0); | ||||
16875 | SDValue ExtB = Mul->getOperand(1); | ||||
16876 | if (ExtA->getOpcode() != ExtendCode || ExtB->getOpcode() != ExtendCode) | ||||
16877 | return false; | ||||
16878 | A = ExtA->getOperand(0); | ||||
16879 | B = ExtB->getOperand(0); | ||||
16880 | if (ExtTypeMatches(A, ExtTypes) && ExtTypeMatches(B, ExtTypes)) { | ||||
16881 | A = ExtendIfNeeded(A, ExtendCode); | ||||
16882 | B = ExtendIfNeeded(B, ExtendCode); | ||||
16883 | return true; | ||||
16884 | } | ||||
16885 | return false; | ||||
16886 | }; | ||||
16887 | auto IsPredVMLAV = [&](MVT RetTy, unsigned ExtendCode, ArrayRef<MVT> ExtTypes, | ||||
16888 | SDValue &A, SDValue &B, SDValue &Mask) { | ||||
16889 | // Same as the pattern above with a select for the zero predicated lanes | ||||
16890 | // ExtA = sext/zext A | ||||
16891 | // ExtB = sext/zext B | ||||
16892 | // Mul = mul ExtA, ExtB | ||||
16893 | // N0 = select Mask, Mul, 0 | ||||
16894 | // vecreduce.add N0 | ||||
16895 | if (ResVT != RetTy || N0->getOpcode() != ISD::VSELECT || | ||||
16896 | !ISD::isBuildVectorAllZeros(N0->getOperand(2).getNode())) | ||||
16897 | return false; | ||||
16898 | Mask = N0->getOperand(0); | ||||
16899 | SDValue Mul = N0->getOperand(1); | ||||
16900 | if (Mul->getOpcode() == ExtendCode && | ||||
16901 | Mul->getOperand(0).getScalarValueSizeInBits() * 2 >= | ||||
16902 | ResVT.getScalarSizeInBits()) | ||||
16903 | Mul = Mul->getOperand(0); | ||||
16904 | if (Mul->getOpcode() != ISD::MUL) | ||||
16905 | return false; | ||||
16906 | SDValue ExtA = Mul->getOperand(0); | ||||
16907 | SDValue ExtB = Mul->getOperand(1); | ||||
16908 | if (ExtA->getOpcode() != ExtendCode || ExtB->getOpcode() != ExtendCode) | ||||
16909 | return false; | ||||
16910 | A = ExtA->getOperand(0); | ||||
16911 | B = ExtB->getOperand(0); | ||||
16912 | if (ExtTypeMatches(A, ExtTypes) && ExtTypeMatches(B, ExtTypes)) { | ||||
16913 | A = ExtendIfNeeded(A, ExtendCode); | ||||
16914 | B = ExtendIfNeeded(B, ExtendCode); | ||||
16915 | return true; | ||||
16916 | } | ||||
16917 | return false; | ||||
16918 | }; | ||||
16919 | auto Create64bitNode = [&](unsigned Opcode, ArrayRef<SDValue> Ops) { | ||||
16920 | // Split illegal MVT::v16i8->i64 vector reductions into two legal v8i16->i64 | ||||
16921 | // reductions. The operands are extended with MVEEXT, but as they are | ||||
16922 | // reductions the lane orders do not matter. MVEEXT may be combined with | ||||
16923 | // loads to produce two extending loads, or else they will be expanded to | ||||
16924 | // VREV/VMOVL. | ||||
16925 | EVT VT = Ops[0].getValueType(); | ||||
16926 | if (VT == MVT::v16i8) { | ||||
16927 | assert((Opcode == ARMISD::VMLALVs || Opcode == ARMISD::VMLALVu) &&(static_cast <bool> ((Opcode == ARMISD::VMLALVs || Opcode == ARMISD::VMLALVu) && "Unexpected illegal long reduction opcode" ) ? void (0) : __assert_fail ("(Opcode == ARMISD::VMLALVs || Opcode == ARMISD::VMLALVu) && \"Unexpected illegal long reduction opcode\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 16928, __extension__ __PRETTY_FUNCTION__)) | ||||
16928 | "Unexpected illegal long reduction opcode")(static_cast <bool> ((Opcode == ARMISD::VMLALVs || Opcode == ARMISD::VMLALVu) && "Unexpected illegal long reduction opcode" ) ? void (0) : __assert_fail ("(Opcode == ARMISD::VMLALVs || Opcode == ARMISD::VMLALVu) && \"Unexpected illegal long reduction opcode\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 16928, __extension__ __PRETTY_FUNCTION__)); | ||||
16929 | bool IsUnsigned = Opcode == ARMISD::VMLALVu; | ||||
16930 | |||||
16931 | SDValue Ext0 = | ||||
16932 | DAG.getNode(IsUnsigned ? ARMISD::MVEZEXT : ARMISD::MVESEXT, dl, | ||||
16933 | DAG.getVTList(MVT::v8i16, MVT::v8i16), Ops[0]); | ||||
16934 | SDValue Ext1 = | ||||
16935 | DAG.getNode(IsUnsigned ? ARMISD::MVEZEXT : ARMISD::MVESEXT, dl, | ||||
16936 | DAG.getVTList(MVT::v8i16, MVT::v8i16), Ops[1]); | ||||
16937 | |||||
16938 | SDValue MLA0 = DAG.getNode(Opcode, dl, DAG.getVTList(MVT::i32, MVT::i32), | ||||
16939 | Ext0, Ext1); | ||||
16940 | SDValue MLA1 = | ||||
16941 | DAG.getNode(IsUnsigned ? ARMISD::VMLALVAu : ARMISD::VMLALVAs, dl, | ||||
16942 | DAG.getVTList(MVT::i32, MVT::i32), MLA0, MLA0.getValue(1), | ||||
16943 | Ext0.getValue(1), Ext1.getValue(1)); | ||||
16944 | return DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, MLA1, MLA1.getValue(1)); | ||||
16945 | } | ||||
16946 | SDValue Node = DAG.getNode(Opcode, dl, {MVT::i32, MVT::i32}, Ops); | ||||
16947 | return DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Node, | ||||
16948 | SDValue(Node.getNode(), 1)); | ||||
16949 | }; | ||||
16950 | |||||
16951 | SDValue A, B; | ||||
16952 | SDValue Mask; | ||||
16953 | if (IsVMLAV(MVT::i32, ISD::SIGN_EXTEND, {MVT::v8i16, MVT::v16i8}, A, B)) | ||||
16954 | return DAG.getNode(ARMISD::VMLAVs, dl, ResVT, A, B); | ||||
16955 | if (IsVMLAV(MVT::i32, ISD::ZERO_EXTEND, {MVT::v8i16, MVT::v16i8}, A, B)) | ||||
16956 | return DAG.getNode(ARMISD::VMLAVu, dl, ResVT, A, B); | ||||
16957 | if (IsVMLAV(MVT::i64, ISD::SIGN_EXTEND, {MVT::v16i8, MVT::v8i16, MVT::v4i32}, | ||||
16958 | A, B)) | ||||
16959 | return Create64bitNode(ARMISD::VMLALVs, {A, B}); | ||||
16960 | if (IsVMLAV(MVT::i64, ISD::ZERO_EXTEND, {MVT::v16i8, MVT::v8i16, MVT::v4i32}, | ||||
16961 | A, B)) | ||||
16962 | return Create64bitNode(ARMISD::VMLALVu, {A, B}); | ||||
16963 | if (IsVMLAV(MVT::i16, ISD::SIGN_EXTEND, {MVT::v16i8}, A, B)) | ||||
16964 | return DAG.getNode(ISD::TRUNCATE, dl, ResVT, | ||||
16965 | DAG.getNode(ARMISD::VMLAVs, dl, MVT::i32, A, B)); | ||||
16966 | if (IsVMLAV(MVT::i16, ISD::ZERO_EXTEND, {MVT::v16i8}, A, B)) | ||||
16967 | return DAG.getNode(ISD::TRUNCATE, dl, ResVT, | ||||
16968 | DAG.getNode(ARMISD::VMLAVu, dl, MVT::i32, A, B)); | ||||
16969 | |||||
16970 | if (IsPredVMLAV(MVT::i32, ISD::SIGN_EXTEND, {MVT::v8i16, MVT::v16i8}, A, B, | ||||
16971 | Mask)) | ||||
16972 | return DAG.getNode(ARMISD::VMLAVps, dl, ResVT, A, B, Mask); | ||||
16973 | if (IsPredVMLAV(MVT::i32, ISD::ZERO_EXTEND, {MVT::v8i16, MVT::v16i8}, A, B, | ||||
16974 | Mask)) | ||||
16975 | return DAG.getNode(ARMISD::VMLAVpu, dl, ResVT, A, B, Mask); | ||||
16976 | if (IsPredVMLAV(MVT::i64, ISD::SIGN_EXTEND, {MVT::v8i16, MVT::v4i32}, A, B, | ||||
16977 | Mask)) | ||||
16978 | return Create64bitNode(ARMISD::VMLALVps, {A, B, Mask}); | ||||
16979 | if (IsPredVMLAV(MVT::i64, ISD::ZERO_EXTEND, {MVT::v8i16, MVT::v4i32}, A, B, | ||||
16980 | Mask)) | ||||
16981 | return Create64bitNode(ARMISD::VMLALVpu, {A, B, Mask}); | ||||
16982 | if (IsPredVMLAV(MVT::i16, ISD::SIGN_EXTEND, {MVT::v16i8}, A, B, Mask)) | ||||
16983 | return DAG.getNode(ISD::TRUNCATE, dl, ResVT, | ||||
16984 | DAG.getNode(ARMISD::VMLAVps, dl, MVT::i32, A, B, Mask)); | ||||
16985 | if (IsPredVMLAV(MVT::i16, ISD::ZERO_EXTEND, {MVT::v16i8}, A, B, Mask)) | ||||
16986 | return DAG.getNode(ISD::TRUNCATE, dl, ResVT, | ||||
16987 | DAG.getNode(ARMISD::VMLAVpu, dl, MVT::i32, A, B, Mask)); | ||||
16988 | |||||
16989 | if (SDValue A = IsVADDV(MVT::i32, ISD::SIGN_EXTEND, {MVT::v8i16, MVT::v16i8})) | ||||
16990 | return DAG.getNode(ARMISD::VADDVs, dl, ResVT, A); | ||||
16991 | if (SDValue A = IsVADDV(MVT::i32, ISD::ZERO_EXTEND, {MVT::v8i16, MVT::v16i8})) | ||||
16992 | return DAG.getNode(ARMISD::VADDVu, dl, ResVT, A); | ||||
16993 | if (SDValue A = IsVADDV(MVT::i64, ISD::SIGN_EXTEND, {MVT::v4i32})) | ||||
16994 | return Create64bitNode(ARMISD::VADDLVs, {A}); | ||||
16995 | if (SDValue A = IsVADDV(MVT::i64, ISD::ZERO_EXTEND, {MVT::v4i32})) | ||||
16996 | return Create64bitNode(ARMISD::VADDLVu, {A}); | ||||
16997 | if (SDValue A = IsVADDV(MVT::i16, ISD::SIGN_EXTEND, {MVT::v16i8})) | ||||
16998 | return DAG.getNode(ISD::TRUNCATE, dl, ResVT, | ||||
16999 | DAG.getNode(ARMISD::VADDVs, dl, MVT::i32, A)); | ||||
17000 | if (SDValue A = IsVADDV(MVT::i16, ISD::ZERO_EXTEND, {MVT::v16i8})) | ||||
17001 | return DAG.getNode(ISD::TRUNCATE, dl, ResVT, | ||||
17002 | DAG.getNode(ARMISD::VADDVu, dl, MVT::i32, A)); | ||||
17003 | |||||
17004 | if (SDValue A = IsPredVADDV(MVT::i32, ISD::SIGN_EXTEND, {MVT::v8i16, MVT::v16i8}, Mask)) | ||||
17005 | return DAG.getNode(ARMISD::VADDVps, dl, ResVT, A, Mask); | ||||
17006 | if (SDValue A = IsPredVADDV(MVT::i32, ISD::ZERO_EXTEND, {MVT::v8i16, MVT::v16i8}, Mask)) | ||||
17007 | return DAG.getNode(ARMISD::VADDVpu, dl, ResVT, A, Mask); | ||||
17008 | if (SDValue A = IsPredVADDV(MVT::i64, ISD::SIGN_EXTEND, {MVT::v4i32}, Mask)) | ||||
17009 | return Create64bitNode(ARMISD::VADDLVps, {A, Mask}); | ||||
17010 | if (SDValue A = IsPredVADDV(MVT::i64, ISD::ZERO_EXTEND, {MVT::v4i32}, Mask)) | ||||
17011 | return Create64bitNode(ARMISD::VADDLVpu, {A, Mask}); | ||||
17012 | if (SDValue A = IsPredVADDV(MVT::i16, ISD::SIGN_EXTEND, {MVT::v16i8}, Mask)) | ||||
17013 | return DAG.getNode(ISD::TRUNCATE, dl, ResVT, | ||||
17014 | DAG.getNode(ARMISD::VADDVps, dl, MVT::i32, A, Mask)); | ||||
17015 | if (SDValue A = IsPredVADDV(MVT::i16, ISD::ZERO_EXTEND, {MVT::v16i8}, Mask)) | ||||
17016 | return DAG.getNode(ISD::TRUNCATE, dl, ResVT, | ||||
17017 | DAG.getNode(ARMISD::VADDVpu, dl, MVT::i32, A, Mask)); | ||||
17018 | |||||
17019 | // Some complications. We can get a case where the two inputs of the mul are | ||||
17020 | // the same, then the output sext will have been helpfully converted to a | ||||
17021 | // zext. Turn it back. | ||||
17022 | SDValue Op = N0; | ||||
17023 | if (Op->getOpcode() == ISD::VSELECT) | ||||
17024 | Op = Op->getOperand(1); | ||||
17025 | if (Op->getOpcode() == ISD::ZERO_EXTEND && | ||||
17026 | Op->getOperand(0)->getOpcode() == ISD::MUL) { | ||||
17027 | SDValue Mul = Op->getOperand(0); | ||||
17028 | if (Mul->getOperand(0) == Mul->getOperand(1) && | ||||
17029 | Mul->getOperand(0)->getOpcode() == ISD::SIGN_EXTEND) { | ||||
17030 | SDValue Ext = DAG.getNode(ISD::SIGN_EXTEND, dl, N0->getValueType(0), Mul); | ||||
17031 | if (Op != N0) | ||||
17032 | Ext = DAG.getNode(ISD::VSELECT, dl, N0->getValueType(0), | ||||
17033 | N0->getOperand(0), Ext, N0->getOperand(2)); | ||||
17034 | return DAG.getNode(ISD::VECREDUCE_ADD, dl, ResVT, Ext); | ||||
17035 | } | ||||
17036 | } | ||||
17037 | |||||
17038 | return SDValue(); | ||||
17039 | } | ||||
17040 | |||||
17041 | static SDValue PerformVMOVNCombine(SDNode *N, | ||||
17042 | TargetLowering::DAGCombinerInfo &DCI) { | ||||
17043 | SDValue Op0 = N->getOperand(0); | ||||
17044 | SDValue Op1 = N->getOperand(1); | ||||
17045 | unsigned IsTop = N->getConstantOperandVal(2); | ||||
17046 | |||||
17047 | // VMOVNT a undef -> a | ||||
17048 | // VMOVNB a undef -> a | ||||
17049 | // VMOVNB undef a -> a | ||||
17050 | if (Op1->isUndef()) | ||||
17051 | return Op0; | ||||
17052 | if (Op0->isUndef() && !IsTop) | ||||
17053 | return Op1; | ||||
17054 | |||||
17055 | // VMOVNt(c, VQMOVNb(a, b)) => VQMOVNt(c, b) | ||||
17056 | // VMOVNb(c, VQMOVNb(a, b)) => VQMOVNb(c, b) | ||||
17057 | if ((Op1->getOpcode() == ARMISD::VQMOVNs || | ||||
17058 | Op1->getOpcode() == ARMISD::VQMOVNu) && | ||||
17059 | Op1->getConstantOperandVal(2) == 0) | ||||
17060 | return DCI.DAG.getNode(Op1->getOpcode(), SDLoc(Op1), N->getValueType(0), | ||||
17061 | Op0, Op1->getOperand(1), N->getOperand(2)); | ||||
17062 | |||||
17063 | // Only the bottom lanes from Qm (Op1) and either the top or bottom lanes from | ||||
17064 | // Qd (Op0) are demanded from a VMOVN, depending on whether we are inserting | ||||
17065 | // into the top or bottom lanes. | ||||
17066 | unsigned NumElts = N->getValueType(0).getVectorNumElements(); | ||||
17067 | APInt Op1DemandedElts = APInt::getSplat(NumElts, APInt::getLowBitsSet(2, 1)); | ||||
17068 | APInt Op0DemandedElts = | ||||
17069 | IsTop ? Op1DemandedElts | ||||
17070 | : APInt::getSplat(NumElts, APInt::getHighBitsSet(2, 1)); | ||||
17071 | |||||
17072 | const TargetLowering &TLI = DCI.DAG.getTargetLoweringInfo(); | ||||
17073 | if (TLI.SimplifyDemandedVectorElts(Op0, Op0DemandedElts, DCI)) | ||||
17074 | return SDValue(N, 0); | ||||
17075 | if (TLI.SimplifyDemandedVectorElts(Op1, Op1DemandedElts, DCI)) | ||||
17076 | return SDValue(N, 0); | ||||
17077 | |||||
17078 | return SDValue(); | ||||
17079 | } | ||||
17080 | |||||
17081 | static SDValue PerformVQMOVNCombine(SDNode *N, | ||||
17082 | TargetLowering::DAGCombinerInfo &DCI) { | ||||
17083 | SDValue Op0 = N->getOperand(0); | ||||
17084 | unsigned IsTop = N->getConstantOperandVal(2); | ||||
17085 | |||||
17086 | unsigned NumElts = N->getValueType(0).getVectorNumElements(); | ||||
17087 | APInt Op0DemandedElts = | ||||
17088 | APInt::getSplat(NumElts, IsTop ? APInt::getLowBitsSet(2, 1) | ||||
17089 | : APInt::getHighBitsSet(2, 1)); | ||||
17090 | |||||
17091 | const TargetLowering &TLI = DCI.DAG.getTargetLoweringInfo(); | ||||
17092 | if (TLI.SimplifyDemandedVectorElts(Op0, Op0DemandedElts, DCI)) | ||||
17093 | return SDValue(N, 0); | ||||
17094 | return SDValue(); | ||||
17095 | } | ||||
17096 | |||||
17097 | static SDValue PerformLongShiftCombine(SDNode *N, SelectionDAG &DAG) { | ||||
17098 | SDLoc DL(N); | ||||
17099 | SDValue Op0 = N->getOperand(0); | ||||
17100 | SDValue Op1 = N->getOperand(1); | ||||
17101 | |||||
17102 | // Turn X << -C -> X >> C and viceversa. The negative shifts can come up from | ||||
17103 | // uses of the intrinsics. | ||||
17104 | if (auto C = dyn_cast<ConstantSDNode>(N->getOperand(2))) { | ||||
17105 | int ShiftAmt = C->getSExtValue(); | ||||
17106 | if (ShiftAmt == 0) { | ||||
17107 | SDValue Merge = DAG.getMergeValues({Op0, Op1}, DL); | ||||
17108 | DAG.ReplaceAllUsesWith(N, Merge.getNode()); | ||||
17109 | return SDValue(); | ||||
17110 | } | ||||
17111 | |||||
17112 | if (ShiftAmt >= -32 && ShiftAmt < 0) { | ||||
17113 | unsigned NewOpcode = | ||||
17114 | N->getOpcode() == ARMISD::LSLL ? ARMISD::LSRL : ARMISD::LSLL; | ||||
17115 | SDValue NewShift = DAG.getNode(NewOpcode, DL, N->getVTList(), Op0, Op1, | ||||
17116 | DAG.getConstant(-ShiftAmt, DL, MVT::i32)); | ||||
17117 | DAG.ReplaceAllUsesWith(N, NewShift.getNode()); | ||||
17118 | return NewShift; | ||||
17119 | } | ||||
17120 | } | ||||
17121 | |||||
17122 | return SDValue(); | ||||
17123 | } | ||||
17124 | |||||
17125 | /// PerformIntrinsicCombine - ARM-specific DAG combining for intrinsics. | ||||
17126 | SDValue ARMTargetLowering::PerformIntrinsicCombine(SDNode *N, | ||||
17127 | DAGCombinerInfo &DCI) const { | ||||
17128 | SelectionDAG &DAG = DCI.DAG; | ||||
17129 | unsigned IntNo = cast<ConstantSDNode>(N->getOperand(0))->getZExtValue(); | ||||
17130 | switch (IntNo) { | ||||
17131 | default: | ||||
17132 | // Don't do anything for most intrinsics. | ||||
17133 | break; | ||||
17134 | |||||
17135 | // Vector shifts: check for immediate versions and lower them. | ||||
17136 | // Note: This is done during DAG combining instead of DAG legalizing because | ||||
17137 | // the build_vectors for 64-bit vector element shift counts are generally | ||||
17138 | // not legal, and it is hard to see their values after they get legalized to | ||||
17139 | // loads from a constant pool. | ||||
17140 | case Intrinsic::arm_neon_vshifts: | ||||
17141 | case Intrinsic::arm_neon_vshiftu: | ||||
17142 | case Intrinsic::arm_neon_vrshifts: | ||||
17143 | case Intrinsic::arm_neon_vrshiftu: | ||||
17144 | case Intrinsic::arm_neon_vrshiftn: | ||||
17145 | case Intrinsic::arm_neon_vqshifts: | ||||
17146 | case Intrinsic::arm_neon_vqshiftu: | ||||
17147 | case Intrinsic::arm_neon_vqshiftsu: | ||||
17148 | case Intrinsic::arm_neon_vqshiftns: | ||||
17149 | case Intrinsic::arm_neon_vqshiftnu: | ||||
17150 | case Intrinsic::arm_neon_vqshiftnsu: | ||||
17151 | case Intrinsic::arm_neon_vqrshiftns: | ||||
17152 | case Intrinsic::arm_neon_vqrshiftnu: | ||||
17153 | case Intrinsic::arm_neon_vqrshiftnsu: { | ||||
17154 | EVT VT = N->getOperand(1).getValueType(); | ||||
17155 | int64_t Cnt; | ||||
17156 | unsigned VShiftOpc = 0; | ||||
17157 | |||||
17158 | switch (IntNo) { | ||||
17159 | case Intrinsic::arm_neon_vshifts: | ||||
17160 | case Intrinsic::arm_neon_vshiftu: | ||||
17161 | if (isVShiftLImm(N->getOperand(2), VT, false, Cnt)) { | ||||
17162 | VShiftOpc = ARMISD::VSHLIMM; | ||||
17163 | break; | ||||
17164 | } | ||||
17165 | if (isVShiftRImm(N->getOperand(2), VT, false, true, Cnt)) { | ||||
17166 | VShiftOpc = (IntNo == Intrinsic::arm_neon_vshifts ? ARMISD::VSHRsIMM | ||||
17167 | : ARMISD::VSHRuIMM); | ||||
17168 | break; | ||||
17169 | } | ||||
17170 | return SDValue(); | ||||
17171 | |||||
17172 | case Intrinsic::arm_neon_vrshifts: | ||||
17173 | case Intrinsic::arm_neon_vrshiftu: | ||||
17174 | if (isVShiftRImm(N->getOperand(2), VT, false, true, Cnt)) | ||||
17175 | break; | ||||
17176 | return SDValue(); | ||||
17177 | |||||
17178 | case Intrinsic::arm_neon_vqshifts: | ||||
17179 | case Intrinsic::arm_neon_vqshiftu: | ||||
17180 | if (isVShiftLImm(N->getOperand(2), VT, false, Cnt)) | ||||
17181 | break; | ||||
17182 | return SDValue(); | ||||
17183 | |||||
17184 | case Intrinsic::arm_neon_vqshiftsu: | ||||
17185 | if (isVShiftLImm(N->getOperand(2), VT, false, Cnt)) | ||||
17186 | break; | ||||
17187 | llvm_unreachable("invalid shift count for vqshlu intrinsic")::llvm::llvm_unreachable_internal("invalid shift count for vqshlu intrinsic" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 17187); | ||||
17188 | |||||
17189 | case Intrinsic::arm_neon_vrshiftn: | ||||
17190 | case Intrinsic::arm_neon_vqshiftns: | ||||
17191 | case Intrinsic::arm_neon_vqshiftnu: | ||||
17192 | case Intrinsic::arm_neon_vqshiftnsu: | ||||
17193 | case Intrinsic::arm_neon_vqrshiftns: | ||||
17194 | case Intrinsic::arm_neon_vqrshiftnu: | ||||
17195 | case Intrinsic::arm_neon_vqrshiftnsu: | ||||
17196 | // Narrowing shifts require an immediate right shift. | ||||
17197 | if (isVShiftRImm(N->getOperand(2), VT, true, true, Cnt)) | ||||
17198 | break; | ||||
17199 | llvm_unreachable("invalid shift count for narrowing vector shift "::llvm::llvm_unreachable_internal("invalid shift count for narrowing vector shift " "intrinsic", "llvm/lib/Target/ARM/ARMISelLowering.cpp", 17200 ) | ||||
17200 | "intrinsic")::llvm::llvm_unreachable_internal("invalid shift count for narrowing vector shift " "intrinsic", "llvm/lib/Target/ARM/ARMISelLowering.cpp", 17200 ); | ||||
17201 | |||||
17202 | default: | ||||
17203 | llvm_unreachable("unhandled vector shift")::llvm::llvm_unreachable_internal("unhandled vector shift", "llvm/lib/Target/ARM/ARMISelLowering.cpp" , 17203); | ||||
17204 | } | ||||
17205 | |||||
17206 | switch (IntNo) { | ||||
17207 | case Intrinsic::arm_neon_vshifts: | ||||
17208 | case Intrinsic::arm_neon_vshiftu: | ||||
17209 | // Opcode already set above. | ||||
17210 | break; | ||||
17211 | case Intrinsic::arm_neon_vrshifts: | ||||
17212 | VShiftOpc = ARMISD::VRSHRsIMM; | ||||
17213 | break; | ||||
17214 | case Intrinsic::arm_neon_vrshiftu: | ||||
17215 | VShiftOpc = ARMISD::VRSHRuIMM; | ||||
17216 | break; | ||||
17217 | case Intrinsic::arm_neon_vrshiftn: | ||||
17218 | VShiftOpc = ARMISD::VRSHRNIMM; | ||||
17219 | break; | ||||
17220 | case Intrinsic::arm_neon_vqshifts: | ||||
17221 | VShiftOpc = ARMISD::VQSHLsIMM; | ||||
17222 | break; | ||||
17223 | case Intrinsic::arm_neon_vqshiftu: | ||||
17224 | VShiftOpc = ARMISD::VQSHLuIMM; | ||||
17225 | break; | ||||
17226 | case Intrinsic::arm_neon_vqshiftsu: | ||||
17227 | VShiftOpc = ARMISD::VQSHLsuIMM; | ||||
17228 | break; | ||||
17229 | case Intrinsic::arm_neon_vqshiftns: | ||||
17230 | VShiftOpc = ARMISD::VQSHRNsIMM; | ||||
17231 | break; | ||||
17232 | case Intrinsic::arm_neon_vqshiftnu: | ||||
17233 | VShiftOpc = ARMISD::VQSHRNuIMM; | ||||
17234 | break; | ||||
17235 | case Intrinsic::arm_neon_vqshiftnsu: | ||||
17236 | VShiftOpc = ARMISD::VQSHRNsuIMM; | ||||
17237 | break; | ||||
17238 | case Intrinsic::arm_neon_vqrshiftns: | ||||
17239 | VShiftOpc = ARMISD::VQRSHRNsIMM; | ||||
17240 | break; | ||||
17241 | case Intrinsic::arm_neon_vqrshiftnu: | ||||
17242 | VShiftOpc = ARMISD::VQRSHRNuIMM; | ||||
17243 | break; | ||||
17244 | case Intrinsic::arm_neon_vqrshiftnsu: | ||||
17245 | VShiftOpc = ARMISD::VQRSHRNsuIMM; | ||||
17246 | break; | ||||
17247 | } | ||||
17248 | |||||
17249 | SDLoc dl(N); | ||||
17250 | return DAG.getNode(VShiftOpc, dl, N->getValueType(0), | ||||
17251 | N->getOperand(1), DAG.getConstant(Cnt, dl, MVT::i32)); | ||||
17252 | } | ||||
17253 | |||||
17254 | case Intrinsic::arm_neon_vshiftins: { | ||||
17255 | EVT VT = N->getOperand(1).getValueType(); | ||||
17256 | int64_t Cnt; | ||||
17257 | unsigned VShiftOpc = 0; | ||||
17258 | |||||
17259 | if (isVShiftLImm(N->getOperand(3), VT, false, Cnt)) | ||||
17260 | VShiftOpc = ARMISD::VSLIIMM; | ||||
17261 | else if (isVShiftRImm(N->getOperand(3), VT, false, true, Cnt)) | ||||
17262 | VShiftOpc = ARMISD::VSRIIMM; | ||||
17263 | else { | ||||
17264 | llvm_unreachable("invalid shift count for vsli/vsri intrinsic")::llvm::llvm_unreachable_internal("invalid shift count for vsli/vsri intrinsic" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 17264); | ||||
17265 | } | ||||
17266 | |||||
17267 | SDLoc dl(N); | ||||
17268 | return DAG.getNode(VShiftOpc, dl, N->getValueType(0), | ||||
17269 | N->getOperand(1), N->getOperand(2), | ||||
17270 | DAG.getConstant(Cnt, dl, MVT::i32)); | ||||
17271 | } | ||||
17272 | |||||
17273 | case Intrinsic::arm_neon_vqrshifts: | ||||
17274 | case Intrinsic::arm_neon_vqrshiftu: | ||||
17275 | // No immediate versions of these to check for. | ||||
17276 | break; | ||||
17277 | |||||
17278 | case Intrinsic::arm_mve_vqdmlah: | ||||
17279 | case Intrinsic::arm_mve_vqdmlash: | ||||
17280 | case Intrinsic::arm_mve_vqrdmlah: | ||||
17281 | case Intrinsic::arm_mve_vqrdmlash: | ||||
17282 | case Intrinsic::arm_mve_vmla_n_predicated: | ||||
17283 | case Intrinsic::arm_mve_vmlas_n_predicated: | ||||
17284 | case Intrinsic::arm_mve_vqdmlah_predicated: | ||||
17285 | case Intrinsic::arm_mve_vqdmlash_predicated: | ||||
17286 | case Intrinsic::arm_mve_vqrdmlah_predicated: | ||||
17287 | case Intrinsic::arm_mve_vqrdmlash_predicated: { | ||||
17288 | // These intrinsics all take an i32 scalar operand which is narrowed to the | ||||
17289 | // size of a single lane of the vector type they return. So we don't need | ||||
17290 | // any bits of that operand above that point, which allows us to eliminate | ||||
17291 | // uxth/sxth. | ||||
17292 | unsigned BitWidth = N->getValueType(0).getScalarSizeInBits(); | ||||
17293 | APInt DemandedMask = APInt::getLowBitsSet(32, BitWidth); | ||||
17294 | if (SimplifyDemandedBits(N->getOperand(3), DemandedMask, DCI)) | ||||
17295 | return SDValue(); | ||||
17296 | break; | ||||
17297 | } | ||||
17298 | |||||
17299 | case Intrinsic::arm_mve_minv: | ||||
17300 | case Intrinsic::arm_mve_maxv: | ||||
17301 | case Intrinsic::arm_mve_minav: | ||||
17302 | case Intrinsic::arm_mve_maxav: | ||||
17303 | case Intrinsic::arm_mve_minv_predicated: | ||||
17304 | case Intrinsic::arm_mve_maxv_predicated: | ||||
17305 | case Intrinsic::arm_mve_minav_predicated: | ||||
17306 | case Intrinsic::arm_mve_maxav_predicated: { | ||||
17307 | // These intrinsics all take an i32 scalar operand which is narrowed to the | ||||
17308 | // size of a single lane of the vector type they take as the other input. | ||||
17309 | unsigned BitWidth = N->getOperand(2)->getValueType(0).getScalarSizeInBits(); | ||||
17310 | APInt DemandedMask = APInt::getLowBitsSet(32, BitWidth); | ||||
17311 | if (SimplifyDemandedBits(N->getOperand(1), DemandedMask, DCI)) | ||||
17312 | return SDValue(); | ||||
17313 | break; | ||||
17314 | } | ||||
17315 | |||||
17316 | case Intrinsic::arm_mve_addv: { | ||||
17317 | // Turn this intrinsic straight into the appropriate ARMISD::VADDV node, | ||||
17318 | // which allow PerformADDVecReduce to turn it into VADDLV when possible. | ||||
17319 | bool Unsigned = cast<ConstantSDNode>(N->getOperand(2))->getZExtValue(); | ||||
17320 | unsigned Opc = Unsigned ? ARMISD::VADDVu : ARMISD::VADDVs; | ||||
17321 | return DAG.getNode(Opc, SDLoc(N), N->getVTList(), N->getOperand(1)); | ||||
17322 | } | ||||
17323 | |||||
17324 | case Intrinsic::arm_mve_addlv: | ||||
17325 | case Intrinsic::arm_mve_addlv_predicated: { | ||||
17326 | // Same for these, but ARMISD::VADDLV has to be followed by a BUILD_PAIR | ||||
17327 | // which recombines the two outputs into an i64 | ||||
17328 | bool Unsigned = cast<ConstantSDNode>(N->getOperand(2))->getZExtValue(); | ||||
17329 | unsigned Opc = IntNo == Intrinsic::arm_mve_addlv ? | ||||
17330 | (Unsigned ? ARMISD::VADDLVu : ARMISD::VADDLVs) : | ||||
17331 | (Unsigned ? ARMISD::VADDLVpu : ARMISD::VADDLVps); | ||||
17332 | |||||
17333 | SmallVector<SDValue, 4> Ops; | ||||
17334 | for (unsigned i = 1, e = N->getNumOperands(); i < e; i++) | ||||
17335 | if (i != 2) // skip the unsigned flag | ||||
17336 | Ops.push_back(N->getOperand(i)); | ||||
17337 | |||||
17338 | SDLoc dl(N); | ||||
17339 | SDValue val = DAG.getNode(Opc, dl, {MVT::i32, MVT::i32}, Ops); | ||||
17340 | return DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, val.getValue(0), | ||||
17341 | val.getValue(1)); | ||||
17342 | } | ||||
17343 | } | ||||
17344 | |||||
17345 | return SDValue(); | ||||
17346 | } | ||||
17347 | |||||
17348 | /// PerformShiftCombine - Checks for immediate versions of vector shifts and | ||||
17349 | /// lowers them. As with the vector shift intrinsics, this is done during DAG | ||||
17350 | /// combining instead of DAG legalizing because the build_vectors for 64-bit | ||||
17351 | /// vector element shift counts are generally not legal, and it is hard to see | ||||
17352 | /// their values after they get legalized to loads from a constant pool. | ||||
17353 | static SDValue PerformShiftCombine(SDNode *N, | ||||
17354 | TargetLowering::DAGCombinerInfo &DCI, | ||||
17355 | const ARMSubtarget *ST) { | ||||
17356 | SelectionDAG &DAG = DCI.DAG; | ||||
17357 | EVT VT = N->getValueType(0); | ||||
17358 | |||||
17359 | if (ST->isThumb1Only() && N->getOpcode() == ISD::SHL && VT == MVT::i32 && | ||||
17360 | N->getOperand(0)->getOpcode() == ISD::AND && | ||||
17361 | N->getOperand(0)->hasOneUse()) { | ||||
17362 | if (DCI.isBeforeLegalize() || DCI.isCalledByLegalizer()) | ||||
17363 | return SDValue(); | ||||
17364 | // Look for the pattern (shl (and x, AndMask), ShiftAmt). This doesn't | ||||
17365 | // usually show up because instcombine prefers to canonicalize it to | ||||
17366 | // (and (shl x, ShiftAmt) (shl AndMask, ShiftAmt)), but the shift can come | ||||
17367 | // out of GEP lowering in some cases. | ||||
17368 | SDValue N0 = N->getOperand(0); | ||||
17369 | ConstantSDNode *ShiftAmtNode = dyn_cast<ConstantSDNode>(N->getOperand(1)); | ||||
17370 | if (!ShiftAmtNode) | ||||
17371 | return SDValue(); | ||||
17372 | uint32_t ShiftAmt = static_cast<uint32_t>(ShiftAmtNode->getZExtValue()); | ||||
17373 | ConstantSDNode *AndMaskNode = dyn_cast<ConstantSDNode>(N0->getOperand(1)); | ||||
17374 | if (!AndMaskNode) | ||||
17375 | return SDValue(); | ||||
17376 | uint32_t AndMask = static_cast<uint32_t>(AndMaskNode->getZExtValue()); | ||||
17377 | // Don't transform uxtb/uxth. | ||||
17378 | if (AndMask == 255 || AndMask == 65535) | ||||
17379 | return SDValue(); | ||||
17380 | if (isMask_32(AndMask)) { | ||||
17381 | uint32_t MaskedBits = countLeadingZeros(AndMask); | ||||
17382 | if (MaskedBits > ShiftAmt) { | ||||
17383 | SDLoc DL(N); | ||||
17384 | SDValue SHL = DAG.getNode(ISD::SHL, DL, MVT::i32, N0->getOperand(0), | ||||
17385 | DAG.getConstant(MaskedBits, DL, MVT::i32)); | ||||
17386 | return DAG.getNode( | ||||
17387 | ISD::SRL, DL, MVT::i32, SHL, | ||||
17388 | DAG.getConstant(MaskedBits - ShiftAmt, DL, MVT::i32)); | ||||
17389 | } | ||||
17390 | } | ||||
17391 | } | ||||
17392 | |||||
17393 | // Nothing to be done for scalar shifts. | ||||
17394 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | ||||
17395 | if (!VT.isVector() || !TLI.isTypeLegal(VT)) | ||||
17396 | return SDValue(); | ||||
17397 | if (ST->hasMVEIntegerOps() && VT == MVT::v2i64) | ||||
17398 | return SDValue(); | ||||
17399 | |||||
17400 | int64_t Cnt; | ||||
17401 | |||||
17402 | switch (N->getOpcode()) { | ||||
17403 | default: llvm_unreachable("unexpected shift opcode")::llvm::llvm_unreachable_internal("unexpected shift opcode", "llvm/lib/Target/ARM/ARMISelLowering.cpp" , 17403); | ||||
17404 | |||||
17405 | case ISD::SHL: | ||||
17406 | if (isVShiftLImm(N->getOperand(1), VT, false, Cnt)) { | ||||
17407 | SDLoc dl(N); | ||||
17408 | return DAG.getNode(ARMISD::VSHLIMM, dl, VT, N->getOperand(0), | ||||
17409 | DAG.getConstant(Cnt, dl, MVT::i32)); | ||||
17410 | } | ||||
17411 | break; | ||||
17412 | |||||
17413 | case ISD::SRA: | ||||
17414 | case ISD::SRL: | ||||
17415 | if (isVShiftRImm(N->getOperand(1), VT, false, false, Cnt)) { | ||||
17416 | unsigned VShiftOpc = | ||||
17417 | (N->getOpcode() == ISD::SRA ? ARMISD::VSHRsIMM : ARMISD::VSHRuIMM); | ||||
17418 | SDLoc dl(N); | ||||
17419 | return DAG.getNode(VShiftOpc, dl, VT, N->getOperand(0), | ||||
17420 | DAG.getConstant(Cnt, dl, MVT::i32)); | ||||
17421 | } | ||||
17422 | } | ||||
17423 | return SDValue(); | ||||
17424 | } | ||||
17425 | |||||
17426 | // Look for a sign/zero/fpextend extend of a larger than legal load. This can be | ||||
17427 | // split into multiple extending loads, which are simpler to deal with than an | ||||
17428 | // arbitrary extend. For fp extends we use an integer extending load and a VCVTL | ||||
17429 | // to convert the type to an f32. | ||||
17430 | static SDValue PerformSplittingToWideningLoad(SDNode *N, SelectionDAG &DAG) { | ||||
17431 | SDValue N0 = N->getOperand(0); | ||||
17432 | if (N0.getOpcode() != ISD::LOAD) | ||||
17433 | return SDValue(); | ||||
17434 | LoadSDNode *LD = cast<LoadSDNode>(N0.getNode()); | ||||
17435 | if (!LD->isSimple() || !N0.hasOneUse() || LD->isIndexed() || | ||||
17436 | LD->getExtensionType() != ISD::NON_EXTLOAD) | ||||
17437 | return SDValue(); | ||||
17438 | EVT FromVT = LD->getValueType(0); | ||||
17439 | EVT ToVT = N->getValueType(0); | ||||
17440 | if (!ToVT.isVector()) | ||||
17441 | return SDValue(); | ||||
17442 | assert(FromVT.getVectorNumElements() == ToVT.getVectorNumElements())(static_cast <bool> (FromVT.getVectorNumElements() == ToVT .getVectorNumElements()) ? void (0) : __assert_fail ("FromVT.getVectorNumElements() == ToVT.getVectorNumElements()" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 17442, __extension__ __PRETTY_FUNCTION__)); | ||||
17443 | EVT ToEltVT = ToVT.getVectorElementType(); | ||||
17444 | EVT FromEltVT = FromVT.getVectorElementType(); | ||||
17445 | |||||
17446 | unsigned NumElements = 0; | ||||
17447 | if (ToEltVT == MVT::i32 && FromEltVT == MVT::i8) | ||||
17448 | NumElements = 4; | ||||
17449 | if (ToEltVT == MVT::f32 && FromEltVT == MVT::f16) | ||||
17450 | NumElements = 4; | ||||
17451 | if (NumElements == 0 || | ||||
17452 | (FromEltVT != MVT::f16 && FromVT.getVectorNumElements() == NumElements) || | ||||
17453 | FromVT.getVectorNumElements() % NumElements != 0 || | ||||
17454 | !isPowerOf2_32(NumElements)) | ||||
17455 | return SDValue(); | ||||
17456 | |||||
17457 | LLVMContext &C = *DAG.getContext(); | ||||
17458 | SDLoc DL(LD); | ||||
17459 | // Details about the old load | ||||
17460 | SDValue Ch = LD->getChain(); | ||||
17461 | SDValue BasePtr = LD->getBasePtr(); | ||||
17462 | Align Alignment = LD->getOriginalAlign(); | ||||
17463 | MachineMemOperand::Flags MMOFlags = LD->getMemOperand()->getFlags(); | ||||
17464 | AAMDNodes AAInfo = LD->getAAInfo(); | ||||
17465 | |||||
17466 | ISD::LoadExtType NewExtType = | ||||
17467 | N->getOpcode() == ISD::SIGN_EXTEND ? ISD::SEXTLOAD : ISD::ZEXTLOAD; | ||||
17468 | SDValue Offset = DAG.getUNDEF(BasePtr.getValueType()); | ||||
17469 | EVT NewFromVT = EVT::getVectorVT( | ||||
17470 | C, EVT::getIntegerVT(C, FromEltVT.getScalarSizeInBits()), NumElements); | ||||
17471 | EVT NewToVT = EVT::getVectorVT( | ||||
17472 | C, EVT::getIntegerVT(C, ToEltVT.getScalarSizeInBits()), NumElements); | ||||
17473 | |||||
17474 | SmallVector<SDValue, 4> Loads; | ||||
17475 | SmallVector<SDValue, 4> Chains; | ||||
17476 | for (unsigned i = 0; i < FromVT.getVectorNumElements() / NumElements; i++) { | ||||
17477 | unsigned NewOffset = (i * NewFromVT.getSizeInBits()) / 8; | ||||
17478 | SDValue NewPtr = | ||||
17479 | DAG.getObjectPtrOffset(DL, BasePtr, TypeSize::Fixed(NewOffset)); | ||||
17480 | |||||
17481 | SDValue NewLoad = | ||||
17482 | DAG.getLoad(ISD::UNINDEXED, NewExtType, NewToVT, DL, Ch, NewPtr, Offset, | ||||
17483 | LD->getPointerInfo().getWithOffset(NewOffset), NewFromVT, | ||||
17484 | Alignment, MMOFlags, AAInfo); | ||||
17485 | Loads.push_back(NewLoad); | ||||
17486 | Chains.push_back(SDValue(NewLoad.getNode(), 1)); | ||||
17487 | } | ||||
17488 | |||||
17489 | // Float truncs need to extended with VCVTB's into their floating point types. | ||||
17490 | if (FromEltVT == MVT::f16) { | ||||
17491 | SmallVector<SDValue, 4> Extends; | ||||
17492 | |||||
17493 | for (unsigned i = 0; i < Loads.size(); i++) { | ||||
17494 | SDValue LoadBC = | ||||
17495 | DAG.getNode(ARMISD::VECTOR_REG_CAST, DL, MVT::v8f16, Loads[i]); | ||||
17496 | SDValue FPExt = DAG.getNode(ARMISD::VCVTL, DL, MVT::v4f32, LoadBC, | ||||
17497 | DAG.getConstant(0, DL, MVT::i32)); | ||||
17498 | Extends.push_back(FPExt); | ||||
17499 | } | ||||
17500 | |||||
17501 | Loads = Extends; | ||||
17502 | } | ||||
17503 | |||||
17504 | SDValue NewChain = DAG.getNode(ISD::TokenFactor, DL, MVT::Other, Chains); | ||||
17505 | DAG.ReplaceAllUsesOfValueWith(SDValue(LD, 1), NewChain); | ||||
17506 | return DAG.getNode(ISD::CONCAT_VECTORS, DL, ToVT, Loads); | ||||
17507 | } | ||||
17508 | |||||
17509 | /// PerformExtendCombine - Target-specific DAG combining for ISD::SIGN_EXTEND, | ||||
17510 | /// ISD::ZERO_EXTEND, and ISD::ANY_EXTEND. | ||||
17511 | static SDValue PerformExtendCombine(SDNode *N, SelectionDAG &DAG, | ||||
17512 | const ARMSubtarget *ST) { | ||||
17513 | SDValue N0 = N->getOperand(0); | ||||
17514 | |||||
17515 | // Check for sign- and zero-extensions of vector extract operations of 8- and | ||||
17516 | // 16-bit vector elements. NEON and MVE support these directly. They are | ||||
17517 | // handled during DAG combining because type legalization will promote them | ||||
17518 | // to 32-bit types and it is messy to recognize the operations after that. | ||||
17519 | if ((ST->hasNEON() || ST->hasMVEIntegerOps()) && | ||||
17520 | N0.getOpcode() == ISD::EXTRACT_VECTOR_ELT) { | ||||
17521 | SDValue Vec = N0.getOperand(0); | ||||
17522 | SDValue Lane = N0.getOperand(1); | ||||
17523 | EVT VT = N->getValueType(0); | ||||
17524 | EVT EltVT = N0.getValueType(); | ||||
17525 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | ||||
17526 | |||||
17527 | if (VT == MVT::i32 && | ||||
17528 | (EltVT == MVT::i8 || EltVT == MVT::i16) && | ||||
17529 | TLI.isTypeLegal(Vec.getValueType()) && | ||||
17530 | isa<ConstantSDNode>(Lane)) { | ||||
17531 | |||||
17532 | unsigned Opc = 0; | ||||
17533 | switch (N->getOpcode()) { | ||||
17534 | default: llvm_unreachable("unexpected opcode")::llvm::llvm_unreachable_internal("unexpected opcode", "llvm/lib/Target/ARM/ARMISelLowering.cpp" , 17534); | ||||
17535 | case ISD::SIGN_EXTEND: | ||||
17536 | Opc = ARMISD::VGETLANEs; | ||||
17537 | break; | ||||
17538 | case ISD::ZERO_EXTEND: | ||||
17539 | case ISD::ANY_EXTEND: | ||||
17540 | Opc = ARMISD::VGETLANEu; | ||||
17541 | break; | ||||
17542 | } | ||||
17543 | return DAG.getNode(Opc, SDLoc(N), VT, Vec, Lane); | ||||
17544 | } | ||||
17545 | } | ||||
17546 | |||||
17547 | if (ST->hasMVEIntegerOps()) | ||||
17548 | if (SDValue NewLoad = PerformSplittingToWideningLoad(N, DAG)) | ||||
17549 | return NewLoad; | ||||
17550 | |||||
17551 | return SDValue(); | ||||
17552 | } | ||||
17553 | |||||
17554 | static SDValue PerformFPExtendCombine(SDNode *N, SelectionDAG &DAG, | ||||
17555 | const ARMSubtarget *ST) { | ||||
17556 | if (ST->hasMVEFloatOps()) | ||||
17557 | if (SDValue NewLoad = PerformSplittingToWideningLoad(N, DAG)) | ||||
17558 | return NewLoad; | ||||
17559 | |||||
17560 | return SDValue(); | ||||
17561 | } | ||||
17562 | |||||
17563 | // Lower smin(smax(x, C1), C2) to ssat or usat, if they have saturating | ||||
17564 | // constant bounds. | ||||
17565 | static SDValue PerformMinMaxToSatCombine(SDValue Op, SelectionDAG &DAG, | ||||
17566 | const ARMSubtarget *Subtarget) { | ||||
17567 | if ((Subtarget->isThumb() || !Subtarget->hasV6Ops()) && | ||||
17568 | !Subtarget->isThumb2()) | ||||
17569 | return SDValue(); | ||||
17570 | |||||
17571 | EVT VT = Op.getValueType(); | ||||
17572 | SDValue Op0 = Op.getOperand(0); | ||||
17573 | |||||
17574 | if (VT != MVT::i32 || | ||||
17575 | (Op0.getOpcode() != ISD::SMIN && Op0.getOpcode() != ISD::SMAX) || | ||||
17576 | !isa<ConstantSDNode>(Op.getOperand(1)) || | ||||
17577 | !isa<ConstantSDNode>(Op0.getOperand(1))) | ||||
17578 | return SDValue(); | ||||
17579 | |||||
17580 | SDValue Min = Op; | ||||
17581 | SDValue Max = Op0; | ||||
17582 | SDValue Input = Op0.getOperand(0); | ||||
17583 | if (Min.getOpcode() == ISD::SMAX) | ||||
17584 | std::swap(Min, Max); | ||||
17585 | |||||
17586 | APInt MinC = Min.getConstantOperandAPInt(1); | ||||
17587 | APInt MaxC = Max.getConstantOperandAPInt(1); | ||||
17588 | |||||
17589 | if (Min.getOpcode() != ISD::SMIN || Max.getOpcode() != ISD::SMAX || | ||||
17590 | !(MinC + 1).isPowerOf2()) | ||||
17591 | return SDValue(); | ||||
17592 | |||||
17593 | SDLoc DL(Op); | ||||
17594 | if (MinC == ~MaxC) | ||||
17595 | return DAG.getNode(ARMISD::SSAT, DL, VT, Input, | ||||
17596 | DAG.getConstant(MinC.countTrailingOnes(), DL, VT)); | ||||
17597 | if (MaxC == 0) | ||||
17598 | return DAG.getNode(ARMISD::USAT, DL, VT, Input, | ||||
17599 | DAG.getConstant(MinC.countTrailingOnes(), DL, VT)); | ||||
17600 | |||||
17601 | return SDValue(); | ||||
17602 | } | ||||
17603 | |||||
17604 | /// PerformMinMaxCombine - Target-specific DAG combining for creating truncating | ||||
17605 | /// saturates. | ||||
17606 | static SDValue PerformMinMaxCombine(SDNode *N, SelectionDAG &DAG, | ||||
17607 | const ARMSubtarget *ST) { | ||||
17608 | EVT VT = N->getValueType(0); | ||||
17609 | SDValue N0 = N->getOperand(0); | ||||
17610 | |||||
17611 | if (VT == MVT::i32) | ||||
17612 | return PerformMinMaxToSatCombine(SDValue(N, 0), DAG, ST); | ||||
17613 | |||||
17614 | if (!ST->hasMVEIntegerOps()) | ||||
17615 | return SDValue(); | ||||
17616 | |||||
17617 | if (SDValue V = PerformVQDMULHCombine(N, DAG)) | ||||
17618 | return V; | ||||
17619 | |||||
17620 | if (VT != MVT::v4i32 && VT != MVT::v8i16) | ||||
17621 | return SDValue(); | ||||
17622 | |||||
17623 | auto IsSignedSaturate = [&](SDNode *Min, SDNode *Max) { | ||||
17624 | // Check one is a smin and the other is a smax | ||||
17625 | if (Min->getOpcode() != ISD::SMIN) | ||||
17626 | std::swap(Min, Max); | ||||
17627 | if (Min->getOpcode() != ISD::SMIN || Max->getOpcode() != ISD::SMAX) | ||||
17628 | return false; | ||||
17629 | |||||
17630 | APInt SaturateC; | ||||
17631 | if (VT == MVT::v4i32) | ||||
17632 | SaturateC = APInt(32, (1 << 15) - 1, true); | ||||
17633 | else //if (VT == MVT::v8i16) | ||||
17634 | SaturateC = APInt(16, (1 << 7) - 1, true); | ||||
17635 | |||||
17636 | APInt MinC, MaxC; | ||||
17637 | if (!ISD::isConstantSplatVector(Min->getOperand(1).getNode(), MinC) || | ||||
17638 | MinC != SaturateC) | ||||
17639 | return false; | ||||
17640 | if (!ISD::isConstantSplatVector(Max->getOperand(1).getNode(), MaxC) || | ||||
17641 | MaxC != ~SaturateC) | ||||
17642 | return false; | ||||
17643 | return true; | ||||
17644 | }; | ||||
17645 | |||||
17646 | if (IsSignedSaturate(N, N0.getNode())) { | ||||
17647 | SDLoc DL(N); | ||||
17648 | MVT ExtVT, HalfVT; | ||||
17649 | if (VT == MVT::v4i32) { | ||||
17650 | HalfVT = MVT::v8i16; | ||||
17651 | ExtVT = MVT::v4i16; | ||||
17652 | } else { // if (VT == MVT::v8i16) | ||||
17653 | HalfVT = MVT::v16i8; | ||||
17654 | ExtVT = MVT::v8i8; | ||||
17655 | } | ||||
17656 | |||||
17657 | // Create a VQMOVNB with undef top lanes, then signed extended into the top | ||||
17658 | // half. That extend will hopefully be removed if only the bottom bits are | ||||
17659 | // demanded (though a truncating store, for example). | ||||
17660 | SDValue VQMOVN = | ||||
17661 | DAG.getNode(ARMISD::VQMOVNs, DL, HalfVT, DAG.getUNDEF(HalfVT), | ||||
17662 | N0->getOperand(0), DAG.getConstant(0, DL, MVT::i32)); | ||||
17663 | SDValue Bitcast = DAG.getNode(ARMISD::VECTOR_REG_CAST, DL, VT, VQMOVN); | ||||
17664 | return DAG.getNode(ISD::SIGN_EXTEND_INREG, DL, VT, Bitcast, | ||||
17665 | DAG.getValueType(ExtVT)); | ||||
17666 | } | ||||
17667 | |||||
17668 | auto IsUnsignedSaturate = [&](SDNode *Min) { | ||||
17669 | // For unsigned, we just need to check for <= 0xffff | ||||
17670 | if (Min->getOpcode() != ISD::UMIN) | ||||
17671 | return false; | ||||
17672 | |||||
17673 | APInt SaturateC; | ||||
17674 | if (VT == MVT::v4i32) | ||||
17675 | SaturateC = APInt(32, (1 << 16) - 1, true); | ||||
17676 | else //if (VT == MVT::v8i16) | ||||
17677 | SaturateC = APInt(16, (1 << 8) - 1, true); | ||||
17678 | |||||
17679 | APInt MinC; | ||||
17680 | if (!ISD::isConstantSplatVector(Min->getOperand(1).getNode(), MinC) || | ||||
17681 | MinC != SaturateC) | ||||
17682 | return false; | ||||
17683 | return true; | ||||
17684 | }; | ||||
17685 | |||||
17686 | if (IsUnsignedSaturate(N)) { | ||||
17687 | SDLoc DL(N); | ||||
17688 | MVT HalfVT; | ||||
17689 | unsigned ExtConst; | ||||
17690 | if (VT == MVT::v4i32) { | ||||
17691 | HalfVT = MVT::v8i16; | ||||
17692 | ExtConst = 0x0000FFFF; | ||||
17693 | } else { //if (VT == MVT::v8i16) | ||||
17694 | HalfVT = MVT::v16i8; | ||||
17695 | ExtConst = 0x00FF; | ||||
17696 | } | ||||
17697 | |||||
17698 | // Create a VQMOVNB with undef top lanes, then ZExt into the top half with | ||||
17699 | // an AND. That extend will hopefully be removed if only the bottom bits are | ||||
17700 | // demanded (though a truncating store, for example). | ||||
17701 | SDValue VQMOVN = | ||||
17702 | DAG.getNode(ARMISD::VQMOVNu, DL, HalfVT, DAG.getUNDEF(HalfVT), N0, | ||||
17703 | DAG.getConstant(0, DL, MVT::i32)); | ||||
17704 | SDValue Bitcast = DAG.getNode(ARMISD::VECTOR_REG_CAST, DL, VT, VQMOVN); | ||||
17705 | return DAG.getNode(ISD::AND, DL, VT, Bitcast, | ||||
17706 | DAG.getConstant(ExtConst, DL, VT)); | ||||
17707 | } | ||||
17708 | |||||
17709 | return SDValue(); | ||||
17710 | } | ||||
17711 | |||||
17712 | static const APInt *isPowerOf2Constant(SDValue V) { | ||||
17713 | ConstantSDNode *C = dyn_cast<ConstantSDNode>(V); | ||||
17714 | if (!C) | ||||
17715 | return nullptr; | ||||
17716 | const APInt *CV = &C->getAPIntValue(); | ||||
17717 | return CV->isPowerOf2() ? CV : nullptr; | ||||
17718 | } | ||||
17719 | |||||
17720 | SDValue ARMTargetLowering::PerformCMOVToBFICombine(SDNode *CMOV, SelectionDAG &DAG) const { | ||||
17721 | // If we have a CMOV, OR and AND combination such as: | ||||
17722 | // if (x & CN) | ||||
17723 | // y |= CM; | ||||
17724 | // | ||||
17725 | // And: | ||||
17726 | // * CN is a single bit; | ||||
17727 | // * All bits covered by CM are known zero in y | ||||
17728 | // | ||||
17729 | // Then we can convert this into a sequence of BFI instructions. This will | ||||
17730 | // always be a win if CM is a single bit, will always be no worse than the | ||||
17731 | // TST&OR sequence if CM is two bits, and for thumb will be no worse if CM is | ||||
17732 | // three bits (due to the extra IT instruction). | ||||
17733 | |||||
17734 | SDValue Op0 = CMOV->getOperand(0); | ||||
17735 | SDValue Op1 = CMOV->getOperand(1); | ||||
17736 | auto CCNode = cast<ConstantSDNode>(CMOV->getOperand(2)); | ||||
17737 | auto CC = CCNode->getAPIntValue().getLimitedValue(); | ||||
17738 | SDValue CmpZ = CMOV->getOperand(4); | ||||
17739 | |||||
17740 | // The compare must be against zero. | ||||
17741 | if (!isNullConstant(CmpZ->getOperand(1))) | ||||
17742 | return SDValue(); | ||||
17743 | |||||
17744 | assert(CmpZ->getOpcode() == ARMISD::CMPZ)(static_cast <bool> (CmpZ->getOpcode() == ARMISD::CMPZ ) ? void (0) : __assert_fail ("CmpZ->getOpcode() == ARMISD::CMPZ" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 17744, __extension__ __PRETTY_FUNCTION__)); | ||||
17745 | SDValue And = CmpZ->getOperand(0); | ||||
17746 | if (And->getOpcode() != ISD::AND) | ||||
17747 | return SDValue(); | ||||
17748 | const APInt *AndC = isPowerOf2Constant(And->getOperand(1)); | ||||
17749 | if (!AndC) | ||||
17750 | return SDValue(); | ||||
17751 | SDValue X = And->getOperand(0); | ||||
17752 | |||||
17753 | if (CC == ARMCC::EQ) { | ||||
17754 | // We're performing an "equal to zero" compare. Swap the operands so we | ||||
17755 | // canonicalize on a "not equal to zero" compare. | ||||
17756 | std::swap(Op0, Op1); | ||||
17757 | } else { | ||||
17758 | assert(CC == ARMCC::NE && "How can a CMPZ node not be EQ or NE?")(static_cast <bool> (CC == ARMCC::NE && "How can a CMPZ node not be EQ or NE?" ) ? void (0) : __assert_fail ("CC == ARMCC::NE && \"How can a CMPZ node not be EQ or NE?\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 17758, __extension__ __PRETTY_FUNCTION__)); | ||||
17759 | } | ||||
17760 | |||||
17761 | if (Op1->getOpcode() != ISD::OR) | ||||
17762 | return SDValue(); | ||||
17763 | |||||
17764 | ConstantSDNode *OrC = dyn_cast<ConstantSDNode>(Op1->getOperand(1)); | ||||
17765 | if (!OrC) | ||||
17766 | return SDValue(); | ||||
17767 | SDValue Y = Op1->getOperand(0); | ||||
17768 | |||||
17769 | if (Op0 != Y) | ||||
17770 | return SDValue(); | ||||
17771 | |||||
17772 | // Now, is it profitable to continue? | ||||
17773 | APInt OrCI = OrC->getAPIntValue(); | ||||
17774 | unsigned Heuristic = Subtarget->isThumb() ? 3 : 2; | ||||
17775 | if (OrCI.countPopulation() > Heuristic) | ||||
17776 | return SDValue(); | ||||
17777 | |||||
17778 | // Lastly, can we determine that the bits defined by OrCI | ||||
17779 | // are zero in Y? | ||||
17780 | KnownBits Known = DAG.computeKnownBits(Y); | ||||
17781 | if ((OrCI & Known.Zero) != OrCI) | ||||
17782 | return SDValue(); | ||||
17783 | |||||
17784 | // OK, we can do the combine. | ||||
17785 | SDValue V = Y; | ||||
17786 | SDLoc dl(X); | ||||
17787 | EVT VT = X.getValueType(); | ||||
17788 | unsigned BitInX = AndC->logBase2(); | ||||
17789 | |||||
17790 | if (BitInX != 0) { | ||||
17791 | // We must shift X first. | ||||
17792 | X = DAG.getNode(ISD::SRL, dl, VT, X, | ||||
17793 | DAG.getConstant(BitInX, dl, VT)); | ||||
17794 | } | ||||
17795 | |||||
17796 | for (unsigned BitInY = 0, NumActiveBits = OrCI.getActiveBits(); | ||||
17797 | BitInY < NumActiveBits; ++BitInY) { | ||||
17798 | if (OrCI[BitInY] == 0) | ||||
17799 | continue; | ||||
17800 | APInt Mask(VT.getSizeInBits(), 0); | ||||
17801 | Mask.setBit(BitInY); | ||||
17802 | V = DAG.getNode(ARMISD::BFI, dl, VT, V, X, | ||||
17803 | // Confusingly, the operand is an *inverted* mask. | ||||
17804 | DAG.getConstant(~Mask, dl, VT)); | ||||
17805 | } | ||||
17806 | |||||
17807 | return V; | ||||
17808 | } | ||||
17809 | |||||
17810 | // Given N, the value controlling the conditional branch, search for the loop | ||||
17811 | // intrinsic, returning it, along with how the value is used. We need to handle | ||||
17812 | // patterns such as the following: | ||||
17813 | // (brcond (xor (setcc (loop.decrement), 0, ne), 1), exit) | ||||
17814 | // (brcond (setcc (loop.decrement), 0, eq), exit) | ||||
17815 | // (brcond (setcc (loop.decrement), 0, ne), header) | ||||
17816 | static SDValue SearchLoopIntrinsic(SDValue N, ISD::CondCode &CC, int &Imm, | ||||
17817 | bool &Negate) { | ||||
17818 | switch (N->getOpcode()) { | ||||
17819 | default: | ||||
17820 | break; | ||||
17821 | case ISD::XOR: { | ||||
17822 | if (!isa<ConstantSDNode>(N.getOperand(1))) | ||||
17823 | return SDValue(); | ||||
17824 | if (!cast<ConstantSDNode>(N.getOperand(1))->isOne()) | ||||
17825 | return SDValue(); | ||||
17826 | Negate = !Negate; | ||||
17827 | return SearchLoopIntrinsic(N.getOperand(0), CC, Imm, Negate); | ||||
17828 | } | ||||
17829 | case ISD::SETCC: { | ||||
17830 | auto *Const = dyn_cast<ConstantSDNode>(N.getOperand(1)); | ||||
17831 | if (!Const) | ||||
17832 | return SDValue(); | ||||
17833 | if (Const->isZero()) | ||||
17834 | Imm = 0; | ||||
17835 | else if (Const->isOne()) | ||||
17836 | Imm = 1; | ||||
17837 | else | ||||
17838 | return SDValue(); | ||||
17839 | CC = cast<CondCodeSDNode>(N.getOperand(2))->get(); | ||||
17840 | return SearchLoopIntrinsic(N->getOperand(0), CC, Imm, Negate); | ||||
17841 | } | ||||
17842 | case ISD::INTRINSIC_W_CHAIN: { | ||||
17843 | unsigned IntOp = cast<ConstantSDNode>(N.getOperand(1))->getZExtValue(); | ||||
17844 | if (IntOp != Intrinsic::test_start_loop_iterations && | ||||
17845 | IntOp != Intrinsic::loop_decrement_reg) | ||||
17846 | return SDValue(); | ||||
17847 | return N; | ||||
17848 | } | ||||
17849 | } | ||||
17850 | return SDValue(); | ||||
17851 | } | ||||
17852 | |||||
17853 | static SDValue PerformHWLoopCombine(SDNode *N, | ||||
17854 | TargetLowering::DAGCombinerInfo &DCI, | ||||
17855 | const ARMSubtarget *ST) { | ||||
17856 | |||||
17857 | // The hwloop intrinsics that we're interested are used for control-flow, | ||||
17858 | // either for entering or exiting the loop: | ||||
17859 | // - test.start.loop.iterations will test whether its operand is zero. If it | ||||
17860 | // is zero, the proceeding branch should not enter the loop. | ||||
17861 | // - loop.decrement.reg also tests whether its operand is zero. If it is | ||||
17862 | // zero, the proceeding branch should not branch back to the beginning of | ||||
17863 | // the loop. | ||||
17864 | // So here, we need to check that how the brcond is using the result of each | ||||
17865 | // of the intrinsics to ensure that we're branching to the right place at the | ||||
17866 | // right time. | ||||
17867 | |||||
17868 | ISD::CondCode CC; | ||||
17869 | SDValue Cond; | ||||
17870 | int Imm = 1; | ||||
17871 | bool Negate = false; | ||||
17872 | SDValue Chain = N->getOperand(0); | ||||
17873 | SDValue Dest; | ||||
17874 | |||||
17875 | if (N->getOpcode() == ISD::BRCOND) { | ||||
17876 | CC = ISD::SETEQ; | ||||
17877 | Cond = N->getOperand(1); | ||||
17878 | Dest = N->getOperand(2); | ||||
17879 | } else { | ||||
17880 | assert(N->getOpcode() == ISD::BR_CC && "Expected BRCOND or BR_CC!")(static_cast <bool> (N->getOpcode() == ISD::BR_CC && "Expected BRCOND or BR_CC!") ? void (0) : __assert_fail ("N->getOpcode() == ISD::BR_CC && \"Expected BRCOND or BR_CC!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 17880, __extension__ __PRETTY_FUNCTION__)); | ||||
17881 | CC = cast<CondCodeSDNode>(N->getOperand(1))->get(); | ||||
17882 | Cond = N->getOperand(2); | ||||
17883 | Dest = N->getOperand(4); | ||||
17884 | if (auto *Const = dyn_cast<ConstantSDNode>(N->getOperand(3))) { | ||||
17885 | if (!Const->isOne() && !Const->isZero()) | ||||
17886 | return SDValue(); | ||||
17887 | Imm = Const->getZExtValue(); | ||||
17888 | } else | ||||
17889 | return SDValue(); | ||||
17890 | } | ||||
17891 | |||||
17892 | SDValue Int = SearchLoopIntrinsic(Cond, CC, Imm, Negate); | ||||
17893 | if (!Int) | ||||
17894 | return SDValue(); | ||||
17895 | |||||
17896 | if (Negate) | ||||
17897 | CC = ISD::getSetCCInverse(CC, /* Integer inverse */ MVT::i32); | ||||
17898 | |||||
17899 | auto IsTrueIfZero = [](ISD::CondCode CC, int Imm) { | ||||
17900 | return (CC == ISD::SETEQ && Imm == 0) || | ||||
17901 | (CC == ISD::SETNE && Imm == 1) || | ||||
17902 | (CC == ISD::SETLT && Imm == 1) || | ||||
17903 | (CC == ISD::SETULT && Imm == 1); | ||||
17904 | }; | ||||
17905 | |||||
17906 | auto IsFalseIfZero = [](ISD::CondCode CC, int Imm) { | ||||
17907 | return (CC == ISD::SETEQ && Imm == 1) || | ||||
17908 | (CC == ISD::SETNE && Imm == 0) || | ||||
17909 | (CC == ISD::SETGT && Imm == 0) || | ||||
17910 | (CC == ISD::SETUGT && Imm == 0) || | ||||
17911 | (CC == ISD::SETGE && Imm == 1) || | ||||
17912 | (CC == ISD::SETUGE && Imm == 1); | ||||
17913 | }; | ||||
17914 | |||||
17915 | assert((IsTrueIfZero(CC, Imm) || IsFalseIfZero(CC, Imm)) &&(static_cast <bool> ((IsTrueIfZero(CC, Imm) || IsFalseIfZero (CC, Imm)) && "unsupported condition") ? void (0) : __assert_fail ("(IsTrueIfZero(CC, Imm) || IsFalseIfZero(CC, Imm)) && \"unsupported condition\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 17916, __extension__ __PRETTY_FUNCTION__)) | ||||
17916 | "unsupported condition")(static_cast <bool> ((IsTrueIfZero(CC, Imm) || IsFalseIfZero (CC, Imm)) && "unsupported condition") ? void (0) : __assert_fail ("(IsTrueIfZero(CC, Imm) || IsFalseIfZero(CC, Imm)) && \"unsupported condition\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 17916, __extension__ __PRETTY_FUNCTION__)); | ||||
17917 | |||||
17918 | SDLoc dl(Int); | ||||
17919 | SelectionDAG &DAG = DCI.DAG; | ||||
17920 | SDValue Elements = Int.getOperand(2); | ||||
17921 | unsigned IntOp = cast<ConstantSDNode>(Int->getOperand(1))->getZExtValue(); | ||||
17922 | assert((N->hasOneUse() && N->use_begin()->getOpcode() == ISD::BR)(static_cast <bool> ((N->hasOneUse() && N-> use_begin()->getOpcode() == ISD::BR) && "expected single br user" ) ? void (0) : __assert_fail ("(N->hasOneUse() && N->use_begin()->getOpcode() == ISD::BR) && \"expected single br user\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 17923, __extension__ __PRETTY_FUNCTION__)) | ||||
17923 | && "expected single br user")(static_cast <bool> ((N->hasOneUse() && N-> use_begin()->getOpcode() == ISD::BR) && "expected single br user" ) ? void (0) : __assert_fail ("(N->hasOneUse() && N->use_begin()->getOpcode() == ISD::BR) && \"expected single br user\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 17923, __extension__ __PRETTY_FUNCTION__)); | ||||
17924 | SDNode *Br = *N->use_begin(); | ||||
17925 | SDValue OtherTarget = Br->getOperand(1); | ||||
17926 | |||||
17927 | // Update the unconditional branch to branch to the given Dest. | ||||
17928 | auto UpdateUncondBr = [](SDNode *Br, SDValue Dest, SelectionDAG &DAG) { | ||||
17929 | SDValue NewBrOps[] = { Br->getOperand(0), Dest }; | ||||
17930 | SDValue NewBr = DAG.getNode(ISD::BR, SDLoc(Br), MVT::Other, NewBrOps); | ||||
17931 | DAG.ReplaceAllUsesOfValueWith(SDValue(Br, 0), NewBr); | ||||
17932 | }; | ||||
17933 | |||||
17934 | if (IntOp == Intrinsic::test_start_loop_iterations) { | ||||
17935 | SDValue Res; | ||||
17936 | SDValue Setup = DAG.getNode(ARMISD::WLSSETUP, dl, MVT::i32, Elements); | ||||
17937 | // We expect this 'instruction' to branch when the counter is zero. | ||||
17938 | if (IsTrueIfZero(CC, Imm)) { | ||||
17939 | SDValue Ops[] = {Chain, Setup, Dest}; | ||||
17940 | Res = DAG.getNode(ARMISD::WLS, dl, MVT::Other, Ops); | ||||
17941 | } else { | ||||
17942 | // The logic is the reverse of what we need for WLS, so find the other | ||||
17943 | // basic block target: the target of the proceeding br. | ||||
17944 | UpdateUncondBr(Br, Dest, DAG); | ||||
17945 | |||||
17946 | SDValue Ops[] = {Chain, Setup, OtherTarget}; | ||||
17947 | Res = DAG.getNode(ARMISD::WLS, dl, MVT::Other, Ops); | ||||
17948 | } | ||||
17949 | // Update LR count to the new value | ||||
17950 | DAG.ReplaceAllUsesOfValueWith(Int.getValue(0), Setup); | ||||
17951 | // Update chain | ||||
17952 | DAG.ReplaceAllUsesOfValueWith(Int.getValue(2), Int.getOperand(0)); | ||||
17953 | return Res; | ||||
17954 | } else { | ||||
17955 | SDValue Size = DAG.getTargetConstant( | ||||
17956 | cast<ConstantSDNode>(Int.getOperand(3))->getZExtValue(), dl, MVT::i32); | ||||
17957 | SDValue Args[] = { Int.getOperand(0), Elements, Size, }; | ||||
17958 | SDValue LoopDec = DAG.getNode(ARMISD::LOOP_DEC, dl, | ||||
17959 | DAG.getVTList(MVT::i32, MVT::Other), Args); | ||||
17960 | DAG.ReplaceAllUsesWith(Int.getNode(), LoopDec.getNode()); | ||||
17961 | |||||
17962 | // We expect this instruction to branch when the count is not zero. | ||||
17963 | SDValue Target = IsFalseIfZero(CC, Imm) ? Dest : OtherTarget; | ||||
17964 | |||||
17965 | // Update the unconditional branch to target the loop preheader if we've | ||||
17966 | // found the condition has been reversed. | ||||
17967 | if (Target == OtherTarget) | ||||
17968 | UpdateUncondBr(Br, Dest, DAG); | ||||
17969 | |||||
17970 | Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, | ||||
17971 | SDValue(LoopDec.getNode(), 1), Chain); | ||||
17972 | |||||
17973 | SDValue EndArgs[] = { Chain, SDValue(LoopDec.getNode(), 0), Target }; | ||||
17974 | return DAG.getNode(ARMISD::LE, dl, MVT::Other, EndArgs); | ||||
17975 | } | ||||
17976 | return SDValue(); | ||||
17977 | } | ||||
17978 | |||||
17979 | /// PerformBRCONDCombine - Target-specific DAG combining for ARMISD::BRCOND. | ||||
17980 | SDValue | ||||
17981 | ARMTargetLowering::PerformBRCONDCombine(SDNode *N, SelectionDAG &DAG) const { | ||||
17982 | SDValue Cmp = N->getOperand(4); | ||||
17983 | if (Cmp.getOpcode() != ARMISD::CMPZ) | ||||
17984 | // Only looking at NE cases. | ||||
17985 | return SDValue(); | ||||
17986 | |||||
17987 | EVT VT = N->getValueType(0); | ||||
17988 | SDLoc dl(N); | ||||
17989 | SDValue LHS = Cmp.getOperand(0); | ||||
17990 | SDValue RHS = Cmp.getOperand(1); | ||||
17991 | SDValue Chain = N->getOperand(0); | ||||
17992 | SDValue BB = N->getOperand(1); | ||||
17993 | SDValue ARMcc = N->getOperand(2); | ||||
17994 | ARMCC::CondCodes CC = | ||||
17995 | (ARMCC::CondCodes)cast<ConstantSDNode>(ARMcc)->getZExtValue(); | ||||
17996 | |||||
17997 | // (brcond Chain BB ne CPSR (cmpz (and (cmov 0 1 CC CPSR Cmp) 1) 0)) | ||||
17998 | // -> (brcond Chain BB CC CPSR Cmp) | ||||
17999 | if (CC == ARMCC::NE && LHS.getOpcode() == ISD::AND && LHS->hasOneUse() && | ||||
18000 | LHS->getOperand(0)->getOpcode() == ARMISD::CMOV && | ||||
18001 | LHS->getOperand(0)->hasOneUse()) { | ||||
18002 | auto *LHS00C = dyn_cast<ConstantSDNode>(LHS->getOperand(0)->getOperand(0)); | ||||
18003 | auto *LHS01C = dyn_cast<ConstantSDNode>(LHS->getOperand(0)->getOperand(1)); | ||||
18004 | auto *LHS1C = dyn_cast<ConstantSDNode>(LHS->getOperand(1)); | ||||
18005 | auto *RHSC = dyn_cast<ConstantSDNode>(RHS); | ||||
18006 | if ((LHS00C && LHS00C->getZExtValue() == 0) && | ||||
18007 | (LHS01C && LHS01C->getZExtValue() == 1) && | ||||
18008 | (LHS1C && LHS1C->getZExtValue() == 1) && | ||||
18009 | (RHSC && RHSC->getZExtValue() == 0)) { | ||||
18010 | return DAG.getNode( | ||||
18011 | ARMISD::BRCOND, dl, VT, Chain, BB, LHS->getOperand(0)->getOperand(2), | ||||
18012 | LHS->getOperand(0)->getOperand(3), LHS->getOperand(0)->getOperand(4)); | ||||
18013 | } | ||||
18014 | } | ||||
18015 | |||||
18016 | return SDValue(); | ||||
18017 | } | ||||
18018 | |||||
18019 | /// PerformCMOVCombine - Target-specific DAG combining for ARMISD::CMOV. | ||||
18020 | SDValue | ||||
18021 | ARMTargetLowering::PerformCMOVCombine(SDNode *N, SelectionDAG &DAG) const { | ||||
18022 | SDValue Cmp = N->getOperand(4); | ||||
18023 | if (Cmp.getOpcode() != ARMISD::CMPZ) | ||||
18024 | // Only looking at EQ and NE cases. | ||||
18025 | return SDValue(); | ||||
18026 | |||||
18027 | EVT VT = N->getValueType(0); | ||||
18028 | SDLoc dl(N); | ||||
18029 | SDValue LHS = Cmp.getOperand(0); | ||||
18030 | SDValue RHS = Cmp.getOperand(1); | ||||
18031 | SDValue FalseVal = N->getOperand(0); | ||||
18032 | SDValue TrueVal = N->getOperand(1); | ||||
18033 | SDValue ARMcc = N->getOperand(2); | ||||
18034 | ARMCC::CondCodes CC = | ||||
18035 | (ARMCC::CondCodes)cast<ConstantSDNode>(ARMcc)->getZExtValue(); | ||||
18036 | |||||
18037 | // BFI is only available on V6T2+. | ||||
18038 | if (!Subtarget->isThumb1Only() && Subtarget->hasV6T2Ops()) { | ||||
18039 | SDValue R = PerformCMOVToBFICombine(N, DAG); | ||||
18040 | if (R) | ||||
18041 | return R; | ||||
18042 | } | ||||
18043 | |||||
18044 | // Simplify | ||||
18045 | // mov r1, r0 | ||||
18046 | // cmp r1, x | ||||
18047 | // mov r0, y | ||||
18048 | // moveq r0, x | ||||
18049 | // to | ||||
18050 | // cmp r0, x | ||||
18051 | // movne r0, y | ||||
18052 | // | ||||
18053 | // mov r1, r0 | ||||
18054 | // cmp r1, x | ||||
18055 | // mov r0, x | ||||
18056 | // movne r0, y | ||||
18057 | // to | ||||
18058 | // cmp r0, x | ||||
18059 | // movne r0, y | ||||
18060 | /// FIXME: Turn this into a target neutral optimization? | ||||
18061 | SDValue Res; | ||||
18062 | if (CC == ARMCC::NE && FalseVal == RHS && FalseVal != LHS) { | ||||
18063 | Res = DAG.getNode(ARMISD::CMOV, dl, VT, LHS, TrueVal, ARMcc, | ||||
18064 | N->getOperand(3), Cmp); | ||||
18065 | } else if (CC == ARMCC::EQ && TrueVal == RHS) { | ||||
18066 | SDValue ARMcc; | ||||
18067 | SDValue NewCmp = getARMCmp(LHS, RHS, ISD::SETNE, ARMcc, DAG, dl); | ||||
18068 | Res = DAG.getNode(ARMISD::CMOV, dl, VT, LHS, FalseVal, ARMcc, | ||||
18069 | N->getOperand(3), NewCmp); | ||||
18070 | } | ||||
18071 | |||||
18072 | // (cmov F T ne CPSR (cmpz (cmov 0 1 CC CPSR Cmp) 0)) | ||||
18073 | // -> (cmov F T CC CPSR Cmp) | ||||
18074 | if (CC == ARMCC::NE && LHS.getOpcode() == ARMISD::CMOV && LHS->hasOneUse()) { | ||||
18075 | auto *LHS0C = dyn_cast<ConstantSDNode>(LHS->getOperand(0)); | ||||
18076 | auto *LHS1C = dyn_cast<ConstantSDNode>(LHS->getOperand(1)); | ||||
18077 | auto *RHSC = dyn_cast<ConstantSDNode>(RHS); | ||||
18078 | if ((LHS0C && LHS0C->getZExtValue() == 0) && | ||||
18079 | (LHS1C && LHS1C->getZExtValue() == 1) && | ||||
18080 | (RHSC && RHSC->getZExtValue() == 0)) { | ||||
18081 | return DAG.getNode(ARMISD::CMOV, dl, VT, FalseVal, TrueVal, | ||||
18082 | LHS->getOperand(2), LHS->getOperand(3), | ||||
18083 | LHS->getOperand(4)); | ||||
18084 | } | ||||
18085 | } | ||||
18086 | |||||
18087 | if (!VT.isInteger()) | ||||
18088 | return SDValue(); | ||||
18089 | |||||
18090 | // Fold away an unneccessary CMPZ/CMOV | ||||
18091 | // CMOV A, B, C1, $cpsr, (CMPZ (CMOV 1, 0, C2, D), 0) -> | ||||
18092 | // if C1==EQ -> CMOV A, B, C2, $cpsr, D | ||||
18093 | // if C1==NE -> CMOV A, B, NOT(C2), $cpsr, D | ||||
18094 | if (N->getConstantOperandVal(2) == ARMCC::EQ || | ||||
18095 | N->getConstantOperandVal(2) == ARMCC::NE) { | ||||
18096 | ARMCC::CondCodes Cond; | ||||
18097 | if (SDValue C = IsCMPZCSINC(N->getOperand(4).getNode(), Cond)) { | ||||
18098 | if (N->getConstantOperandVal(2) == ARMCC::NE) | ||||
18099 | Cond = ARMCC::getOppositeCondition(Cond); | ||||
18100 | return DAG.getNode(N->getOpcode(), SDLoc(N), MVT::i32, N->getOperand(0), | ||||
18101 | N->getOperand(1), | ||||
18102 | DAG.getTargetConstant(Cond, SDLoc(N), MVT::i32), | ||||
18103 | N->getOperand(3), C); | ||||
18104 | } | ||||
18105 | } | ||||
18106 | |||||
18107 | // Materialize a boolean comparison for integers so we can avoid branching. | ||||
18108 | if (isNullConstant(FalseVal)) { | ||||
18109 | if (CC == ARMCC::EQ && isOneConstant(TrueVal)) { | ||||
18110 | if (!Subtarget->isThumb1Only() && Subtarget->hasV5TOps()) { | ||||
18111 | // If x == y then x - y == 0 and ARM's CLZ will return 32, shifting it | ||||
18112 | // right 5 bits will make that 32 be 1, otherwise it will be 0. | ||||
18113 | // CMOV 0, 1, ==, (CMPZ x, y) -> SRL (CTLZ (SUB x, y)), 5 | ||||
18114 | SDValue Sub = DAG.getNode(ISD::SUB, dl, VT, LHS, RHS); | ||||
18115 | Res = DAG.getNode(ISD::SRL, dl, VT, DAG.getNode(ISD::CTLZ, dl, VT, Sub), | ||||
18116 | DAG.getConstant(5, dl, MVT::i32)); | ||||
18117 | } else { | ||||
18118 | // CMOV 0, 1, ==, (CMPZ x, y) -> | ||||
18119 | // (ADDCARRY (SUB x, y), t:0, t:1) | ||||
18120 | // where t = (SUBCARRY 0, (SUB x, y), 0) | ||||
18121 | // | ||||
18122 | // The SUBCARRY computes 0 - (x - y) and this will give a borrow when | ||||
18123 | // x != y. In other words, a carry C == 1 when x == y, C == 0 | ||||
18124 | // otherwise. | ||||
18125 | // The final ADDCARRY computes | ||||
18126 | // x - y + (0 - (x - y)) + C == C | ||||
18127 | SDValue Sub = DAG.getNode(ISD::SUB, dl, VT, LHS, RHS); | ||||
18128 | SDVTList VTs = DAG.getVTList(VT, MVT::i32); | ||||
18129 | SDValue Neg = DAG.getNode(ISD::USUBO, dl, VTs, FalseVal, Sub); | ||||
18130 | // ISD::SUBCARRY returns a borrow but we want the carry here | ||||
18131 | // actually. | ||||
18132 | SDValue Carry = | ||||
18133 | DAG.getNode(ISD::SUB, dl, MVT::i32, | ||||
18134 | DAG.getConstant(1, dl, MVT::i32), Neg.getValue(1)); | ||||
18135 | Res = DAG.getNode(ISD::ADDCARRY, dl, VTs, Sub, Neg, Carry); | ||||
18136 | } | ||||
18137 | } else if (CC == ARMCC::NE && !isNullConstant(RHS) && | ||||
18138 | (!Subtarget->isThumb1Only() || isPowerOf2Constant(TrueVal))) { | ||||
18139 | // This seems pointless but will allow us to combine it further below. | ||||
18140 | // CMOV 0, z, !=, (CMPZ x, y) -> CMOV (SUBS x, y), z, !=, (SUBS x, y):1 | ||||
18141 | SDValue Sub = | ||||
18142 | DAG.getNode(ARMISD::SUBS, dl, DAG.getVTList(VT, MVT::i32), LHS, RHS); | ||||
18143 | SDValue CPSRGlue = DAG.getCopyToReg(DAG.getEntryNode(), dl, ARM::CPSR, | ||||
18144 | Sub.getValue(1), SDValue()); | ||||
18145 | Res = DAG.getNode(ARMISD::CMOV, dl, VT, Sub, TrueVal, ARMcc, | ||||
18146 | N->getOperand(3), CPSRGlue.getValue(1)); | ||||
18147 | FalseVal = Sub; | ||||
18148 | } | ||||
18149 | } else if (isNullConstant(TrueVal)) { | ||||
18150 | if (CC == ARMCC::EQ && !isNullConstant(RHS) && | ||||
18151 | (!Subtarget->isThumb1Only() || isPowerOf2Constant(FalseVal))) { | ||||
18152 | // This seems pointless but will allow us to combine it further below | ||||
18153 | // Note that we change == for != as this is the dual for the case above. | ||||
18154 | // CMOV z, 0, ==, (CMPZ x, y) -> CMOV (SUBS x, y), z, !=, (SUBS x, y):1 | ||||
18155 | SDValue Sub = | ||||
18156 | DAG.getNode(ARMISD::SUBS, dl, DAG.getVTList(VT, MVT::i32), LHS, RHS); | ||||
18157 | SDValue CPSRGlue = DAG.getCopyToReg(DAG.getEntryNode(), dl, ARM::CPSR, | ||||
18158 | Sub.getValue(1), SDValue()); | ||||
18159 | Res = DAG.getNode(ARMISD::CMOV, dl, VT, Sub, FalseVal, | ||||
18160 | DAG.getConstant(ARMCC::NE, dl, MVT::i32), | ||||
18161 | N->getOperand(3), CPSRGlue.getValue(1)); | ||||
18162 | FalseVal = Sub; | ||||
18163 | } | ||||
18164 | } | ||||
18165 | |||||
18166 | // On Thumb1, the DAG above may be further combined if z is a power of 2 | ||||
18167 | // (z == 2 ^ K). | ||||
18168 | // CMOV (SUBS x, y), z, !=, (SUBS x, y):1 -> | ||||
18169 | // t1 = (USUBO (SUB x, y), 1) | ||||
18170 | // t2 = (SUBCARRY (SUB x, y), t1:0, t1:1) | ||||
18171 | // Result = if K != 0 then (SHL t2:0, K) else t2:0 | ||||
18172 | // | ||||
18173 | // This also handles the special case of comparing against zero; it's | ||||
18174 | // essentially, the same pattern, except there's no SUBS: | ||||
18175 | // CMOV x, z, !=, (CMPZ x, 0) -> | ||||
18176 | // t1 = (USUBO x, 1) | ||||
18177 | // t2 = (SUBCARRY x, t1:0, t1:1) | ||||
18178 | // Result = if K != 0 then (SHL t2:0, K) else t2:0 | ||||
18179 | const APInt *TrueConst; | ||||
18180 | if (Subtarget->isThumb1Only() && CC == ARMCC::NE && | ||||
18181 | ((FalseVal.getOpcode() == ARMISD::SUBS && | ||||
18182 | FalseVal.getOperand(0) == LHS && FalseVal.getOperand(1) == RHS) || | ||||
18183 | (FalseVal == LHS && isNullConstant(RHS))) && | ||||
18184 | (TrueConst = isPowerOf2Constant(TrueVal))) { | ||||
18185 | SDVTList VTs = DAG.getVTList(VT, MVT::i32); | ||||
18186 | unsigned ShiftAmount = TrueConst->logBase2(); | ||||
18187 | if (ShiftAmount) | ||||
18188 | TrueVal = DAG.getConstant(1, dl, VT); | ||||
18189 | SDValue Subc = DAG.getNode(ISD::USUBO, dl, VTs, FalseVal, TrueVal); | ||||
18190 | Res = DAG.getNode(ISD::SUBCARRY, dl, VTs, FalseVal, Subc, Subc.getValue(1)); | ||||
18191 | |||||
18192 | if (ShiftAmount) | ||||
18193 | Res = DAG.getNode(ISD::SHL, dl, VT, Res, | ||||
18194 | DAG.getConstant(ShiftAmount, dl, MVT::i32)); | ||||
18195 | } | ||||
18196 | |||||
18197 | if (Res.getNode()) { | ||||
18198 | KnownBits Known = DAG.computeKnownBits(SDValue(N,0)); | ||||
18199 | // Capture demanded bits information that would be otherwise lost. | ||||
18200 | if (Known.Zero == 0xfffffffe) | ||||
18201 | Res = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Res, | ||||
18202 | DAG.getValueType(MVT::i1)); | ||||
18203 | else if (Known.Zero == 0xffffff00) | ||||
18204 | Res = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Res, | ||||
18205 | DAG.getValueType(MVT::i8)); | ||||
18206 | else if (Known.Zero == 0xffff0000) | ||||
18207 | Res = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Res, | ||||
18208 | DAG.getValueType(MVT::i16)); | ||||
18209 | } | ||||
18210 | |||||
18211 | return Res; | ||||
18212 | } | ||||
18213 | |||||
18214 | static SDValue PerformBITCASTCombine(SDNode *N, | ||||
18215 | TargetLowering::DAGCombinerInfo &DCI, | ||||
18216 | const ARMSubtarget *ST) { | ||||
18217 | SelectionDAG &DAG = DCI.DAG; | ||||
18218 | SDValue Src = N->getOperand(0); | ||||
18219 | EVT DstVT = N->getValueType(0); | ||||
18220 | |||||
18221 | // Convert v4f32 bitcast (v4i32 vdup (i32)) -> v4f32 vdup (i32) under MVE. | ||||
18222 | if (ST->hasMVEIntegerOps() && Src.getOpcode() == ARMISD::VDUP) { | ||||
18223 | EVT SrcVT = Src.getValueType(); | ||||
18224 | if (SrcVT.getScalarSizeInBits() == DstVT.getScalarSizeInBits()) | ||||
18225 | return DAG.getNode(ARMISD::VDUP, SDLoc(N), DstVT, Src.getOperand(0)); | ||||
18226 | } | ||||
18227 | |||||
18228 | // We may have a bitcast of something that has already had this bitcast | ||||
18229 | // combine performed on it, so skip past any VECTOR_REG_CASTs. | ||||
18230 | while (Src.getOpcode() == ARMISD::VECTOR_REG_CAST) | ||||
18231 | Src = Src.getOperand(0); | ||||
18232 | |||||
18233 | // Bitcast from element-wise VMOV or VMVN doesn't need VREV if the VREV that | ||||
18234 | // would be generated is at least the width of the element type. | ||||
18235 | EVT SrcVT = Src.getValueType(); | ||||
18236 | if ((Src.getOpcode() == ARMISD::VMOVIMM || | ||||
18237 | Src.getOpcode() == ARMISD::VMVNIMM || | ||||
18238 | Src.getOpcode() == ARMISD::VMOVFPIMM) && | ||||
18239 | SrcVT.getScalarSizeInBits() <= DstVT.getScalarSizeInBits() && | ||||
18240 | DAG.getDataLayout().isBigEndian()) | ||||
18241 | return DAG.getNode(ARMISD::VECTOR_REG_CAST, SDLoc(N), DstVT, Src); | ||||
18242 | |||||
18243 | // bitcast(extract(x, n)); bitcast(extract(x, n+1)) -> VMOVRRD x | ||||
18244 | if (SDValue R = PerformExtractEltToVMOVRRD(N, DCI)) | ||||
18245 | return R; | ||||
18246 | |||||
18247 | return SDValue(); | ||||
18248 | } | ||||
18249 | |||||
18250 | // Some combines for the MVETrunc truncations legalizer helper. Also lowers the | ||||
18251 | // node into stack operations after legalizeOps. | ||||
18252 | SDValue ARMTargetLowering::PerformMVETruncCombine( | ||||
18253 | SDNode *N, TargetLowering::DAGCombinerInfo &DCI) const { | ||||
18254 | SelectionDAG &DAG = DCI.DAG; | ||||
18255 | EVT VT = N->getValueType(0); | ||||
18256 | SDLoc DL(N); | ||||
18257 | |||||
18258 | // MVETrunc(Undef, Undef) -> Undef | ||||
18259 | if (all_of(N->ops(), [](SDValue Op) { return Op.isUndef(); })) | ||||
18260 | return DAG.getUNDEF(VT); | ||||
18261 | |||||
18262 | // MVETrunc(MVETrunc a b, MVETrunc c, d) -> MVETrunc | ||||
18263 | if (N->getNumOperands() == 2 && | ||||
18264 | N->getOperand(0).getOpcode() == ARMISD::MVETRUNC && | ||||
18265 | N->getOperand(1).getOpcode() == ARMISD::MVETRUNC) | ||||
18266 | return DAG.getNode(ARMISD::MVETRUNC, DL, VT, N->getOperand(0).getOperand(0), | ||||
18267 | N->getOperand(0).getOperand(1), | ||||
18268 | N->getOperand(1).getOperand(0), | ||||
18269 | N->getOperand(1).getOperand(1)); | ||||
18270 | |||||
18271 | // MVETrunc(shuffle, shuffle) -> VMOVN | ||||
18272 | if (N->getNumOperands() == 2 && | ||||
18273 | N->getOperand(0).getOpcode() == ISD::VECTOR_SHUFFLE && | ||||
18274 | N->getOperand(1).getOpcode() == ISD::VECTOR_SHUFFLE) { | ||||
18275 | auto *S0 = cast<ShuffleVectorSDNode>(N->getOperand(0).getNode()); | ||||
18276 | auto *S1 = cast<ShuffleVectorSDNode>(N->getOperand(1).getNode()); | ||||
18277 | |||||
18278 | if (S0->getOperand(0) == S1->getOperand(0) && | ||||
18279 | S0->getOperand(1) == S1->getOperand(1)) { | ||||
18280 | // Construct complete shuffle mask | ||||
18281 | SmallVector<int, 8> Mask(S0->getMask().begin(), S0->getMask().end()); | ||||
18282 | Mask.append(S1->getMask().begin(), S1->getMask().end()); | ||||
18283 | |||||
18284 | if (isVMOVNTruncMask(Mask, VT, false)) | ||||
18285 | return DAG.getNode( | ||||
18286 | ARMISD::VMOVN, DL, VT, | ||||
18287 | DAG.getNode(ARMISD::VECTOR_REG_CAST, DL, VT, S0->getOperand(0)), | ||||
18288 | DAG.getNode(ARMISD::VECTOR_REG_CAST, DL, VT, S0->getOperand(1)), | ||||
18289 | DAG.getConstant(1, DL, MVT::i32)); | ||||
18290 | if (isVMOVNTruncMask(Mask, VT, true)) | ||||
18291 | return DAG.getNode( | ||||
18292 | ARMISD::VMOVN, DL, VT, | ||||
18293 | DAG.getNode(ARMISD::VECTOR_REG_CAST, DL, VT, S0->getOperand(1)), | ||||
18294 | DAG.getNode(ARMISD::VECTOR_REG_CAST, DL, VT, S0->getOperand(0)), | ||||
18295 | DAG.getConstant(1, DL, MVT::i32)); | ||||
18296 | } | ||||
18297 | } | ||||
18298 | |||||
18299 | // For MVETrunc of a buildvector or shuffle, it can be beneficial to lower the | ||||
18300 | // truncate to a buildvector to allow the generic optimisations to kick in. | ||||
18301 | if (all_of(N->ops(), [](SDValue Op) { | ||||
18302 | return Op.getOpcode() == ISD::BUILD_VECTOR || | ||||
18303 | Op.getOpcode() == ISD::VECTOR_SHUFFLE || | ||||
18304 | (Op.getOpcode() == ISD::BITCAST && | ||||
18305 | Op.getOperand(0).getOpcode() == ISD::BUILD_VECTOR); | ||||
18306 | })) { | ||||
18307 | SmallVector<SDValue, 8> Extracts; | ||||
18308 | for (unsigned Op = 0; Op < N->getNumOperands(); Op++) { | ||||
18309 | SDValue O = N->getOperand(Op); | ||||
18310 | for (unsigned i = 0; i < O.getValueType().getVectorNumElements(); i++) { | ||||
18311 | SDValue Ext = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, MVT::i32, O, | ||||
18312 | DAG.getConstant(i, DL, MVT::i32)); | ||||
18313 | Extracts.push_back(Ext); | ||||
18314 | } | ||||
18315 | } | ||||
18316 | return DAG.getBuildVector(VT, DL, Extracts); | ||||
18317 | } | ||||
18318 | |||||
18319 | // If we are late in the legalization process and nothing has optimised | ||||
18320 | // the trunc to anything better, lower it to a stack store and reload, | ||||
18321 | // performing the truncation whilst keeping the lanes in the correct order: | ||||
18322 | // VSTRH.32 a, stack; VSTRH.32 b, stack+8; VLDRW.32 stack; | ||||
18323 | if (!DCI.isAfterLegalizeDAG()) | ||||
18324 | return SDValue(); | ||||
18325 | |||||
18326 | SDValue StackPtr = DAG.CreateStackTemporary(TypeSize::Fixed(16), Align(4)); | ||||
18327 | int SPFI = cast<FrameIndexSDNode>(StackPtr.getNode())->getIndex(); | ||||
18328 | int NumIns = N->getNumOperands(); | ||||
18329 | assert((NumIns == 2 || NumIns == 4) &&(static_cast <bool> ((NumIns == 2 || NumIns == 4) && "Expected 2 or 4 inputs to an MVETrunc") ? void (0) : __assert_fail ("(NumIns == 2 || NumIns == 4) && \"Expected 2 or 4 inputs to an MVETrunc\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 18330, __extension__ __PRETTY_FUNCTION__)) | ||||
18330 | "Expected 2 or 4 inputs to an MVETrunc")(static_cast <bool> ((NumIns == 2 || NumIns == 4) && "Expected 2 or 4 inputs to an MVETrunc") ? void (0) : __assert_fail ("(NumIns == 2 || NumIns == 4) && \"Expected 2 or 4 inputs to an MVETrunc\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 18330, __extension__ __PRETTY_FUNCTION__)); | ||||
18331 | EVT StoreVT = VT.getHalfNumVectorElementsVT(*DAG.getContext()); | ||||
18332 | if (N->getNumOperands() == 4) | ||||
18333 | StoreVT = StoreVT.getHalfNumVectorElementsVT(*DAG.getContext()); | ||||
18334 | |||||
18335 | SmallVector<SDValue> Chains; | ||||
18336 | for (int I = 0; I < NumIns; I++) { | ||||
18337 | SDValue Ptr = DAG.getNode( | ||||
18338 | ISD::ADD, DL, StackPtr.getValueType(), StackPtr, | ||||
18339 | DAG.getConstant(I * 16 / NumIns, DL, StackPtr.getValueType())); | ||||
18340 | MachinePointerInfo MPI = MachinePointerInfo::getFixedStack( | ||||
18341 | DAG.getMachineFunction(), SPFI, I * 16 / NumIns); | ||||
18342 | SDValue Ch = DAG.getTruncStore(DAG.getEntryNode(), DL, N->getOperand(I), | ||||
18343 | Ptr, MPI, StoreVT, Align(4)); | ||||
18344 | Chains.push_back(Ch); | ||||
18345 | } | ||||
18346 | |||||
18347 | SDValue Chain = DAG.getNode(ISD::TokenFactor, DL, MVT::Other, Chains); | ||||
18348 | MachinePointerInfo MPI = | ||||
18349 | MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), SPFI, 0); | ||||
18350 | return DAG.getLoad(VT, DL, Chain, StackPtr, MPI, Align(4)); | ||||
18351 | } | ||||
18352 | |||||
18353 | // Take a MVEEXT(load x) and split that into (extload x, extload x+8) | ||||
18354 | static SDValue PerformSplittingMVEEXTToWideningLoad(SDNode *N, | ||||
18355 | SelectionDAG &DAG) { | ||||
18356 | SDValue N0 = N->getOperand(0); | ||||
18357 | LoadSDNode *LD = dyn_cast<LoadSDNode>(N0.getNode()); | ||||
18358 | if (!LD || !LD->isSimple() || !N0.hasOneUse() || LD->isIndexed()) | ||||
18359 | return SDValue(); | ||||
18360 | |||||
18361 | EVT FromVT = LD->getMemoryVT(); | ||||
18362 | EVT ToVT = N->getValueType(0); | ||||
18363 | if (!ToVT.isVector()) | ||||
18364 | return SDValue(); | ||||
18365 | assert(FromVT.getVectorNumElements() == ToVT.getVectorNumElements() * 2)(static_cast <bool> (FromVT.getVectorNumElements() == ToVT .getVectorNumElements() * 2) ? void (0) : __assert_fail ("FromVT.getVectorNumElements() == ToVT.getVectorNumElements() * 2" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 18365, __extension__ __PRETTY_FUNCTION__)); | ||||
18366 | EVT ToEltVT = ToVT.getVectorElementType(); | ||||
18367 | EVT FromEltVT = FromVT.getVectorElementType(); | ||||
18368 | |||||
18369 | unsigned NumElements = 0; | ||||
18370 | if (ToEltVT == MVT::i32 && (FromEltVT == MVT::i16 || FromEltVT == MVT::i8)) | ||||
18371 | NumElements = 4; | ||||
18372 | if (ToEltVT == MVT::i16 && FromEltVT == MVT::i8) | ||||
18373 | NumElements = 8; | ||||
18374 | assert(NumElements != 0)(static_cast <bool> (NumElements != 0) ? void (0) : __assert_fail ("NumElements != 0", "llvm/lib/Target/ARM/ARMISelLowering.cpp" , 18374, __extension__ __PRETTY_FUNCTION__)); | ||||
18375 | |||||
18376 | ISD::LoadExtType NewExtType = | ||||
18377 | N->getOpcode() == ARMISD::MVESEXT ? ISD::SEXTLOAD : ISD::ZEXTLOAD; | ||||
18378 | if (LD->getExtensionType() != ISD::NON_EXTLOAD && | ||||
18379 | LD->getExtensionType() != ISD::EXTLOAD && | ||||
18380 | LD->getExtensionType() != NewExtType) | ||||
18381 | return SDValue(); | ||||
18382 | |||||
18383 | LLVMContext &C = *DAG.getContext(); | ||||
18384 | SDLoc DL(LD); | ||||
18385 | // Details about the old load | ||||
18386 | SDValue Ch = LD->getChain(); | ||||
18387 | SDValue BasePtr = LD->getBasePtr(); | ||||
18388 | Align Alignment = LD->getOriginalAlign(); | ||||
18389 | MachineMemOperand::Flags MMOFlags = LD->getMemOperand()->getFlags(); | ||||
18390 | AAMDNodes AAInfo = LD->getAAInfo(); | ||||
18391 | |||||
18392 | SDValue Offset = DAG.getUNDEF(BasePtr.getValueType()); | ||||
18393 | EVT NewFromVT = EVT::getVectorVT( | ||||
18394 | C, EVT::getIntegerVT(C, FromEltVT.getScalarSizeInBits()), NumElements); | ||||
18395 | EVT NewToVT = EVT::getVectorVT( | ||||
18396 | C, EVT::getIntegerVT(C, ToEltVT.getScalarSizeInBits()), NumElements); | ||||
18397 | |||||
18398 | SmallVector<SDValue, 4> Loads; | ||||
18399 | SmallVector<SDValue, 4> Chains; | ||||
18400 | for (unsigned i = 0; i < FromVT.getVectorNumElements() / NumElements; i++) { | ||||
18401 | unsigned NewOffset = (i * NewFromVT.getSizeInBits()) / 8; | ||||
18402 | SDValue NewPtr = | ||||
18403 | DAG.getObjectPtrOffset(DL, BasePtr, TypeSize::Fixed(NewOffset)); | ||||
18404 | |||||
18405 | SDValue NewLoad = | ||||
18406 | DAG.getLoad(ISD::UNINDEXED, NewExtType, NewToVT, DL, Ch, NewPtr, Offset, | ||||
18407 | LD->getPointerInfo().getWithOffset(NewOffset), NewFromVT, | ||||
18408 | Alignment, MMOFlags, AAInfo); | ||||
18409 | Loads.push_back(NewLoad); | ||||
18410 | Chains.push_back(SDValue(NewLoad.getNode(), 1)); | ||||
18411 | } | ||||
18412 | |||||
18413 | SDValue NewChain = DAG.getNode(ISD::TokenFactor, DL, MVT::Other, Chains); | ||||
18414 | DAG.ReplaceAllUsesOfValueWith(SDValue(LD, 1), NewChain); | ||||
18415 | return DAG.getMergeValues(Loads, DL); | ||||
18416 | } | ||||
18417 | |||||
18418 | // Perform combines for MVEEXT. If it has not be optimized to anything better | ||||
18419 | // before lowering, it gets converted to stack store and extloads performing the | ||||
18420 | // extend whilst still keeping the same lane ordering. | ||||
18421 | SDValue ARMTargetLowering::PerformMVEExtCombine( | ||||
18422 | SDNode *N, TargetLowering::DAGCombinerInfo &DCI) const { | ||||
18423 | SelectionDAG &DAG = DCI.DAG; | ||||
18424 | EVT VT = N->getValueType(0); | ||||
18425 | SDLoc DL(N); | ||||
18426 | assert(N->getNumValues() == 2 && "Expected MVEEXT with 2 elements")(static_cast <bool> (N->getNumValues() == 2 && "Expected MVEEXT with 2 elements") ? void (0) : __assert_fail ("N->getNumValues() == 2 && \"Expected MVEEXT with 2 elements\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 18426, __extension__ __PRETTY_FUNCTION__)); | ||||
18427 | assert((VT == MVT::v4i32 || VT == MVT::v8i16) && "Unexpected MVEEXT type")(static_cast <bool> ((VT == MVT::v4i32 || VT == MVT::v8i16 ) && "Unexpected MVEEXT type") ? void (0) : __assert_fail ("(VT == MVT::v4i32 || VT == MVT::v8i16) && \"Unexpected MVEEXT type\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 18427, __extension__ __PRETTY_FUNCTION__)); | ||||
18428 | |||||
18429 | EVT ExtVT = N->getOperand(0).getValueType().getHalfNumVectorElementsVT( | ||||
18430 | *DAG.getContext()); | ||||
18431 | auto Extend = [&](SDValue V) { | ||||
18432 | SDValue VVT = DAG.getNode(ARMISD::VECTOR_REG_CAST, DL, VT, V); | ||||
18433 | return N->getOpcode() == ARMISD::MVESEXT | ||||
18434 | ? DAG.getNode(ISD::SIGN_EXTEND_INREG, DL, VT, VVT, | ||||
18435 | DAG.getValueType(ExtVT)) | ||||
18436 | : DAG.getZeroExtendInReg(VVT, DL, ExtVT); | ||||
18437 | }; | ||||
18438 | |||||
18439 | // MVEEXT(VDUP) -> SIGN_EXTEND_INREG(VDUP) | ||||
18440 | if (N->getOperand(0).getOpcode() == ARMISD::VDUP) { | ||||
18441 | SDValue Ext = Extend(N->getOperand(0)); | ||||
18442 | return DAG.getMergeValues({Ext, Ext}, DL); | ||||
18443 | } | ||||
18444 | |||||
18445 | // MVEEXT(shuffle) -> SIGN_EXTEND_INREG/ZERO_EXTEND_INREG | ||||
18446 | if (auto *SVN = dyn_cast<ShuffleVectorSDNode>(N->getOperand(0))) { | ||||
18447 | ArrayRef<int> Mask = SVN->getMask(); | ||||
18448 | assert(Mask.size() == 2 * VT.getVectorNumElements())(static_cast <bool> (Mask.size() == 2 * VT.getVectorNumElements ()) ? void (0) : __assert_fail ("Mask.size() == 2 * VT.getVectorNumElements()" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 18448, __extension__ __PRETTY_FUNCTION__)); | ||||
18449 | assert(Mask.size() == SVN->getValueType(0).getVectorNumElements())(static_cast <bool> (Mask.size() == SVN->getValueType (0).getVectorNumElements()) ? void (0) : __assert_fail ("Mask.size() == SVN->getValueType(0).getVectorNumElements()" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 18449, __extension__ __PRETTY_FUNCTION__)); | ||||
18450 | unsigned Rev = VT == MVT::v4i32 ? ARMISD::VREV32 : ARMISD::VREV16; | ||||
18451 | SDValue Op0 = SVN->getOperand(0); | ||||
18452 | SDValue Op1 = SVN->getOperand(1); | ||||
18453 | |||||
18454 | auto CheckInregMask = [&](int Start, int Offset) { | ||||
18455 | for (int Idx = 0, E = VT.getVectorNumElements(); Idx < E; ++Idx) | ||||
18456 | if (Mask[Start + Idx] >= 0 && Mask[Start + Idx] != Idx * 2 + Offset) | ||||
18457 | return false; | ||||
18458 | return true; | ||||
18459 | }; | ||||
18460 | SDValue V0 = SDValue(N, 0); | ||||
18461 | SDValue V1 = SDValue(N, 1); | ||||
18462 | if (CheckInregMask(0, 0)) | ||||
18463 | V0 = Extend(Op0); | ||||
18464 | else if (CheckInregMask(0, 1)) | ||||
18465 | V0 = Extend(DAG.getNode(Rev, DL, SVN->getValueType(0), Op0)); | ||||
18466 | else if (CheckInregMask(0, Mask.size())) | ||||
18467 | V0 = Extend(Op1); | ||||
18468 | else if (CheckInregMask(0, Mask.size() + 1)) | ||||
18469 | V0 = Extend(DAG.getNode(Rev, DL, SVN->getValueType(0), Op1)); | ||||
18470 | |||||
18471 | if (CheckInregMask(VT.getVectorNumElements(), Mask.size())) | ||||
18472 | V1 = Extend(Op1); | ||||
18473 | else if (CheckInregMask(VT.getVectorNumElements(), Mask.size() + 1)) | ||||
18474 | V1 = Extend(DAG.getNode(Rev, DL, SVN->getValueType(0), Op1)); | ||||
18475 | else if (CheckInregMask(VT.getVectorNumElements(), 0)) | ||||
18476 | V1 = Extend(Op0); | ||||
18477 | else if (CheckInregMask(VT.getVectorNumElements(), 1)) | ||||
18478 | V1 = Extend(DAG.getNode(Rev, DL, SVN->getValueType(0), Op0)); | ||||
18479 | |||||
18480 | if (V0.getNode() != N || V1.getNode() != N) | ||||
18481 | return DAG.getMergeValues({V0, V1}, DL); | ||||
18482 | } | ||||
18483 | |||||
18484 | // MVEEXT(load) -> extload, extload | ||||
18485 | if (N->getOperand(0)->getOpcode() == ISD::LOAD) | ||||
18486 | if (SDValue L = PerformSplittingMVEEXTToWideningLoad(N, DAG)) | ||||
18487 | return L; | ||||
18488 | |||||
18489 | if (!DCI.isAfterLegalizeDAG()) | ||||
18490 | return SDValue(); | ||||
18491 | |||||
18492 | // Lower to a stack store and reload: | ||||
18493 | // VSTRW.32 a, stack; VLDRH.32 stack; VLDRH.32 stack+8; | ||||
18494 | SDValue StackPtr = DAG.CreateStackTemporary(TypeSize::Fixed(16), Align(4)); | ||||
18495 | int SPFI = cast<FrameIndexSDNode>(StackPtr.getNode())->getIndex(); | ||||
18496 | int NumOuts = N->getNumValues(); | ||||
18497 | assert((NumOuts == 2 || NumOuts == 4) &&(static_cast <bool> ((NumOuts == 2 || NumOuts == 4) && "Expected 2 or 4 outputs to an MVEEXT") ? void (0) : __assert_fail ("(NumOuts == 2 || NumOuts == 4) && \"Expected 2 or 4 outputs to an MVEEXT\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 18498, __extension__ __PRETTY_FUNCTION__)) | ||||
18498 | "Expected 2 or 4 outputs to an MVEEXT")(static_cast <bool> ((NumOuts == 2 || NumOuts == 4) && "Expected 2 or 4 outputs to an MVEEXT") ? void (0) : __assert_fail ("(NumOuts == 2 || NumOuts == 4) && \"Expected 2 or 4 outputs to an MVEEXT\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 18498, __extension__ __PRETTY_FUNCTION__)); | ||||
18499 | EVT LoadVT = N->getOperand(0).getValueType().getHalfNumVectorElementsVT( | ||||
18500 | *DAG.getContext()); | ||||
18501 | if (N->getNumOperands() == 4) | ||||
18502 | LoadVT = LoadVT.getHalfNumVectorElementsVT(*DAG.getContext()); | ||||
18503 | |||||
18504 | MachinePointerInfo MPI = | ||||
18505 | MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), SPFI, 0); | ||||
18506 | SDValue Chain = DAG.getStore(DAG.getEntryNode(), DL, N->getOperand(0), | ||||
18507 | StackPtr, MPI, Align(4)); | ||||
18508 | |||||
18509 | SmallVector<SDValue> Loads; | ||||
18510 | for (int I = 0; I < NumOuts; I++) { | ||||
18511 | SDValue Ptr = DAG.getNode( | ||||
18512 | ISD::ADD, DL, StackPtr.getValueType(), StackPtr, | ||||
18513 | DAG.getConstant(I * 16 / NumOuts, DL, StackPtr.getValueType())); | ||||
18514 | MachinePointerInfo MPI = MachinePointerInfo::getFixedStack( | ||||
18515 | DAG.getMachineFunction(), SPFI, I * 16 / NumOuts); | ||||
18516 | SDValue Load = DAG.getExtLoad( | ||||
18517 | N->getOpcode() == ARMISD::MVESEXT ? ISD::SEXTLOAD : ISD::ZEXTLOAD, DL, | ||||
18518 | VT, Chain, Ptr, MPI, LoadVT, Align(4)); | ||||
18519 | Loads.push_back(Load); | ||||
18520 | } | ||||
18521 | |||||
18522 | return DAG.getMergeValues(Loads, DL); | ||||
18523 | } | ||||
18524 | |||||
18525 | SDValue ARMTargetLowering::PerformDAGCombine(SDNode *N, | ||||
18526 | DAGCombinerInfo &DCI) const { | ||||
18527 | switch (N->getOpcode()) { | ||||
18528 | default: break; | ||||
18529 | case ISD::SELECT_CC: | ||||
18530 | case ISD::SELECT: return PerformSELECTCombine(N, DCI, Subtarget); | ||||
18531 | case ISD::VSELECT: return PerformVSELECTCombine(N, DCI, Subtarget); | ||||
18532 | case ISD::SETCC: return PerformVSetCCToVCTPCombine(N, DCI, Subtarget); | ||||
18533 | case ISD::ABS: return PerformABSCombine(N, DCI, Subtarget); | ||||
18534 | case ARMISD::ADDE: return PerformADDECombine(N, DCI, Subtarget); | ||||
18535 | case ARMISD::UMLAL: return PerformUMLALCombine(N, DCI.DAG, Subtarget); | ||||
18536 | case ISD::ADD: return PerformADDCombine(N, DCI, Subtarget); | ||||
18537 | case ISD::SUB: return PerformSUBCombine(N, DCI, Subtarget); | ||||
18538 | case ISD::MUL: return PerformMULCombine(N, DCI, Subtarget); | ||||
18539 | case ISD::OR: return PerformORCombine(N, DCI, Subtarget); | ||||
18540 | case ISD::XOR: return PerformXORCombine(N, DCI, Subtarget); | ||||
18541 | case ISD::AND: return PerformANDCombine(N, DCI, Subtarget); | ||||
18542 | case ISD::BRCOND: | ||||
18543 | case ISD::BR_CC: return PerformHWLoopCombine(N, DCI, Subtarget); | ||||
18544 | case ARMISD::ADDC: | ||||
18545 | case ARMISD::SUBC: return PerformAddcSubcCombine(N, DCI, Subtarget); | ||||
18546 | case ARMISD::SUBE: return PerformAddeSubeCombine(N, DCI, Subtarget); | ||||
18547 | case ARMISD::BFI: return PerformBFICombine(N, DCI.DAG); | ||||
18548 | case ARMISD::VMOVRRD: return PerformVMOVRRDCombine(N, DCI, Subtarget); | ||||
18549 | case ARMISD::VMOVDRR: return PerformVMOVDRRCombine(N, DCI.DAG); | ||||
18550 | case ARMISD::VMOVhr: return PerformVMOVhrCombine(N, DCI); | ||||
18551 | case ARMISD::VMOVrh: return PerformVMOVrhCombine(N, DCI.DAG); | ||||
18552 | case ISD::STORE: return PerformSTORECombine(N, DCI, Subtarget); | ||||
18553 | case ISD::BUILD_VECTOR: return PerformBUILD_VECTORCombine(N, DCI, Subtarget); | ||||
18554 | case ISD::INSERT_VECTOR_ELT: return PerformInsertEltCombine(N, DCI); | ||||
18555 | case ISD::EXTRACT_VECTOR_ELT: | ||||
18556 | return PerformExtractEltCombine(N, DCI, Subtarget); | ||||
18557 | case ISD::SIGN_EXTEND_INREG: return PerformSignExtendInregCombine(N, DCI.DAG); | ||||
18558 | case ISD::INSERT_SUBVECTOR: return PerformInsertSubvectorCombine(N, DCI); | ||||
18559 | case ISD::VECTOR_SHUFFLE: return PerformVECTOR_SHUFFLECombine(N, DCI.DAG); | ||||
18560 | case ARMISD::VDUPLANE: return PerformVDUPLANECombine(N, DCI, Subtarget); | ||||
18561 | case ARMISD::VDUP: return PerformVDUPCombine(N, DCI.DAG, Subtarget); | ||||
18562 | case ISD::FP_TO_SINT: | ||||
18563 | case ISD::FP_TO_UINT: | ||||
18564 | return PerformVCVTCombine(N, DCI.DAG, Subtarget); | ||||
18565 | case ISD::FADD: | ||||
18566 | return PerformFAddVSelectCombine(N, DCI.DAG, Subtarget); | ||||
18567 | case ISD::FDIV: | ||||
18568 | return PerformVDIVCombine(N, DCI.DAG, Subtarget); | ||||
18569 | case ISD::INTRINSIC_WO_CHAIN: | ||||
18570 | return PerformIntrinsicCombine(N, DCI); | ||||
18571 | case ISD::SHL: | ||||
18572 | case ISD::SRA: | ||||
18573 | case ISD::SRL: | ||||
18574 | return PerformShiftCombine(N, DCI, Subtarget); | ||||
18575 | case ISD::SIGN_EXTEND: | ||||
18576 | case ISD::ZERO_EXTEND: | ||||
18577 | case ISD::ANY_EXTEND: | ||||
18578 | return PerformExtendCombine(N, DCI.DAG, Subtarget); | ||||
18579 | case ISD::FP_EXTEND: | ||||
18580 | return PerformFPExtendCombine(N, DCI.DAG, Subtarget); | ||||
18581 | case ISD::SMIN: | ||||
18582 | case ISD::UMIN: | ||||
18583 | case ISD::SMAX: | ||||
18584 | case ISD::UMAX: | ||||
18585 | return PerformMinMaxCombine(N, DCI.DAG, Subtarget); | ||||
18586 | case ARMISD::CMOV: | ||||
18587 | return PerformCMOVCombine(N, DCI.DAG); | ||||
18588 | case ARMISD::BRCOND: | ||||
18589 | return PerformBRCONDCombine(N, DCI.DAG); | ||||
18590 | case ARMISD::CMPZ: | ||||
18591 | return PerformCMPZCombine(N, DCI.DAG); | ||||
18592 | case ARMISD::CSINC: | ||||
18593 | case ARMISD::CSINV: | ||||
18594 | case ARMISD::CSNEG: | ||||
18595 | return PerformCSETCombine(N, DCI.DAG); | ||||
18596 | case ISD::LOAD: | ||||
18597 | return PerformLOADCombine(N, DCI, Subtarget); | ||||
18598 | case ARMISD::VLD1DUP: | ||||
18599 | case ARMISD::VLD2DUP: | ||||
18600 | case ARMISD::VLD3DUP: | ||||
18601 | case ARMISD::VLD4DUP: | ||||
18602 | return PerformVLDCombine(N, DCI); | ||||
18603 | case ARMISD::BUILD_VECTOR: | ||||
18604 | return PerformARMBUILD_VECTORCombine(N, DCI); | ||||
18605 | case ISD::BITCAST: | ||||
18606 | return PerformBITCASTCombine(N, DCI, Subtarget); | ||||
18607 | case ARMISD::PREDICATE_CAST: | ||||
18608 | return PerformPREDICATE_CASTCombine(N, DCI); | ||||
18609 | case ARMISD::VECTOR_REG_CAST: | ||||
18610 | return PerformVECTOR_REG_CASTCombine(N, DCI.DAG, Subtarget); | ||||
18611 | case ARMISD::MVETRUNC: | ||||
18612 | return PerformMVETruncCombine(N, DCI); | ||||
18613 | case ARMISD::MVESEXT: | ||||
18614 | case ARMISD::MVEZEXT: | ||||
18615 | return PerformMVEExtCombine(N, DCI); | ||||
18616 | case ARMISD::VCMP: | ||||
18617 | return PerformVCMPCombine(N, DCI.DAG, Subtarget); | ||||
18618 | case ISD::VECREDUCE_ADD: | ||||
18619 | return PerformVECREDUCE_ADDCombine(N, DCI.DAG, Subtarget); | ||||
18620 | case ARMISD::VMOVN: | ||||
18621 | return PerformVMOVNCombine(N, DCI); | ||||
18622 | case ARMISD::VQMOVNs: | ||||
18623 | case ARMISD::VQMOVNu: | ||||
18624 | return PerformVQMOVNCombine(N, DCI); | ||||
18625 | case ARMISD::ASRL: | ||||
18626 | case ARMISD::LSRL: | ||||
18627 | case ARMISD::LSLL: | ||||
18628 | return PerformLongShiftCombine(N, DCI.DAG); | ||||
18629 | case ARMISD::SMULWB: { | ||||
18630 | unsigned BitWidth = N->getValueType(0).getSizeInBits(); | ||||
18631 | APInt DemandedMask = APInt::getLowBitsSet(BitWidth, 16); | ||||
18632 | if (SimplifyDemandedBits(N->getOperand(1), DemandedMask, DCI)) | ||||
18633 | return SDValue(); | ||||
18634 | break; | ||||
18635 | } | ||||
18636 | case ARMISD::SMULWT: { | ||||
18637 | unsigned BitWidth = N->getValueType(0).getSizeInBits(); | ||||
18638 | APInt DemandedMask = APInt::getHighBitsSet(BitWidth, 16); | ||||
18639 | if (SimplifyDemandedBits(N->getOperand(1), DemandedMask, DCI)) | ||||
18640 | return SDValue(); | ||||
18641 | break; | ||||
18642 | } | ||||
18643 | case ARMISD::SMLALBB: | ||||
18644 | case ARMISD::QADD16b: | ||||
18645 | case ARMISD::QSUB16b: | ||||
18646 | case ARMISD::UQADD16b: | ||||
18647 | case ARMISD::UQSUB16b: { | ||||
18648 | unsigned BitWidth = N->getValueType(0).getSizeInBits(); | ||||
18649 | APInt DemandedMask = APInt::getLowBitsSet(BitWidth, 16); | ||||
18650 | if ((SimplifyDemandedBits(N->getOperand(0), DemandedMask, DCI)) || | ||||
18651 | (SimplifyDemandedBits(N->getOperand(1), DemandedMask, DCI))) | ||||
18652 | return SDValue(); | ||||
18653 | break; | ||||
18654 | } | ||||
18655 | case ARMISD::SMLALBT: { | ||||
18656 | unsigned LowWidth = N->getOperand(0).getValueType().getSizeInBits(); | ||||
18657 | APInt LowMask = APInt::getLowBitsSet(LowWidth, 16); | ||||
18658 | unsigned HighWidth = N->getOperand(1).getValueType().getSizeInBits(); | ||||
18659 | APInt HighMask = APInt::getHighBitsSet(HighWidth, 16); | ||||
18660 | if ((SimplifyDemandedBits(N->getOperand(0), LowMask, DCI)) || | ||||
18661 | (SimplifyDemandedBits(N->getOperand(1), HighMask, DCI))) | ||||
18662 | return SDValue(); | ||||
18663 | break; | ||||
18664 | } | ||||
18665 | case ARMISD::SMLALTB: { | ||||
18666 | unsigned HighWidth = N->getOperand(0).getValueType().getSizeInBits(); | ||||
18667 | APInt HighMask = APInt::getHighBitsSet(HighWidth, 16); | ||||
18668 | unsigned LowWidth = N->getOperand(1).getValueType().getSizeInBits(); | ||||
18669 | APInt LowMask = APInt::getLowBitsSet(LowWidth, 16); | ||||
18670 | if ((SimplifyDemandedBits(N->getOperand(0), HighMask, DCI)) || | ||||
18671 | (SimplifyDemandedBits(N->getOperand(1), LowMask, DCI))) | ||||
18672 | return SDValue(); | ||||
18673 | break; | ||||
18674 | } | ||||
18675 | case ARMISD::SMLALTT: { | ||||
18676 | unsigned BitWidth = N->getValueType(0).getSizeInBits(); | ||||
18677 | APInt DemandedMask = APInt::getHighBitsSet(BitWidth, 16); | ||||
18678 | if ((SimplifyDemandedBits(N->getOperand(0), DemandedMask, DCI)) || | ||||
18679 | (SimplifyDemandedBits(N->getOperand(1), DemandedMask, DCI))) | ||||
18680 | return SDValue(); | ||||
18681 | break; | ||||
18682 | } | ||||
18683 | case ARMISD::QADD8b: | ||||
18684 | case ARMISD::QSUB8b: | ||||
18685 | case ARMISD::UQADD8b: | ||||
18686 | case ARMISD::UQSUB8b: { | ||||
18687 | unsigned BitWidth = N->getValueType(0).getSizeInBits(); | ||||
18688 | APInt DemandedMask = APInt::getLowBitsSet(BitWidth, 8); | ||||
18689 | if ((SimplifyDemandedBits(N->getOperand(0), DemandedMask, DCI)) || | ||||
18690 | (SimplifyDemandedBits(N->getOperand(1), DemandedMask, DCI))) | ||||
18691 | return SDValue(); | ||||
18692 | break; | ||||
18693 | } | ||||
18694 | case ISD::INTRINSIC_VOID: | ||||
18695 | case ISD::INTRINSIC_W_CHAIN: | ||||
18696 | switch (cast<ConstantSDNode>(N->getOperand(1))->getZExtValue()) { | ||||
18697 | case Intrinsic::arm_neon_vld1: | ||||
18698 | case Intrinsic::arm_neon_vld1x2: | ||||
18699 | case Intrinsic::arm_neon_vld1x3: | ||||
18700 | case Intrinsic::arm_neon_vld1x4: | ||||
18701 | case Intrinsic::arm_neon_vld2: | ||||
18702 | case Intrinsic::arm_neon_vld3: | ||||
18703 | case Intrinsic::arm_neon_vld4: | ||||
18704 | case Intrinsic::arm_neon_vld2lane: | ||||
18705 | case Intrinsic::arm_neon_vld3lane: | ||||
18706 | case Intrinsic::arm_neon_vld4lane: | ||||
18707 | case Intrinsic::arm_neon_vld2dup: | ||||
18708 | case Intrinsic::arm_neon_vld3dup: | ||||
18709 | case Intrinsic::arm_neon_vld4dup: | ||||
18710 | case Intrinsic::arm_neon_vst1: | ||||
18711 | case Intrinsic::arm_neon_vst1x2: | ||||
18712 | case Intrinsic::arm_neon_vst1x3: | ||||
18713 | case Intrinsic::arm_neon_vst1x4: | ||||
18714 | case Intrinsic::arm_neon_vst2: | ||||
18715 | case Intrinsic::arm_neon_vst3: | ||||
18716 | case Intrinsic::arm_neon_vst4: | ||||
18717 | case Intrinsic::arm_neon_vst2lane: | ||||
18718 | case Intrinsic::arm_neon_vst3lane: | ||||
18719 | case Intrinsic::arm_neon_vst4lane: | ||||
18720 | return PerformVLDCombine(N, DCI); | ||||
18721 | case Intrinsic::arm_mve_vld2q: | ||||
18722 | case Intrinsic::arm_mve_vld4q: | ||||
18723 | case Intrinsic::arm_mve_vst2q: | ||||
18724 | case Intrinsic::arm_mve_vst4q: | ||||
18725 | return PerformMVEVLDCombine(N, DCI); | ||||
18726 | default: break; | ||||
18727 | } | ||||
18728 | break; | ||||
18729 | } | ||||
18730 | return SDValue(); | ||||
18731 | } | ||||
18732 | |||||
18733 | bool ARMTargetLowering::isDesirableToTransformToIntegerOp(unsigned Opc, | ||||
18734 | EVT VT) const { | ||||
18735 | return (VT == MVT::f32) && (Opc == ISD::LOAD || Opc == ISD::STORE); | ||||
18736 | } | ||||
18737 | |||||
18738 | bool ARMTargetLowering::allowsMisalignedMemoryAccesses(EVT VT, unsigned, | ||||
18739 | Align Alignment, | ||||
18740 | MachineMemOperand::Flags, | ||||
18741 | bool *Fast) const { | ||||
18742 | // Depends what it gets converted into if the type is weird. | ||||
18743 | if (!VT.isSimple()) | ||||
18744 | return false; | ||||
18745 | |||||
18746 | // The AllowsUnaligned flag models the SCTLR.A setting in ARM cpus | ||||
18747 | bool AllowsUnaligned = Subtarget->allowsUnalignedMem(); | ||||
18748 | auto Ty = VT.getSimpleVT().SimpleTy; | ||||
18749 | |||||
18750 | if (Ty == MVT::i8 || Ty == MVT::i16 || Ty == MVT::i32) { | ||||
18751 | // Unaligned access can use (for example) LRDB, LRDH, LDR | ||||
18752 | if (AllowsUnaligned) { | ||||
18753 | if (Fast) | ||||
18754 | *Fast = Subtarget->hasV7Ops(); | ||||
18755 | return true; | ||||
18756 | } | ||||
18757 | } | ||||
18758 | |||||
18759 | if (Ty == MVT::f64 || Ty == MVT::v2f64) { | ||||
18760 | // For any little-endian targets with neon, we can support unaligned ld/st | ||||
18761 | // of D and Q (e.g. {D0,D1}) registers by using vld1.i8/vst1.i8. | ||||
18762 | // A big-endian target may also explicitly support unaligned accesses | ||||
18763 | if (Subtarget->hasNEON() && (AllowsUnaligned || Subtarget->isLittle())) { | ||||
18764 | if (Fast) | ||||
18765 | *Fast = true; | ||||
18766 | return true; | ||||
18767 | } | ||||
18768 | } | ||||
18769 | |||||
18770 | if (!Subtarget->hasMVEIntegerOps()) | ||||
18771 | return false; | ||||
18772 | |||||
18773 | // These are for predicates | ||||
18774 | if ((Ty == MVT::v16i1 || Ty == MVT::v8i1 || Ty == MVT::v4i1 || | ||||
18775 | Ty == MVT::v2i1)) { | ||||
18776 | if (Fast) | ||||
18777 | *Fast = true; | ||||
18778 | return true; | ||||
18779 | } | ||||
18780 | |||||
18781 | // These are for truncated stores/narrowing loads. They are fine so long as | ||||
18782 | // the alignment is at least the size of the item being loaded | ||||
18783 | if ((Ty == MVT::v4i8 || Ty == MVT::v8i8 || Ty == MVT::v4i16) && | ||||
18784 | Alignment >= VT.getScalarSizeInBits() / 8) { | ||||
18785 | if (Fast) | ||||
18786 | *Fast = true; | ||||
18787 | return true; | ||||
18788 | } | ||||
18789 | |||||
18790 | // In little-endian MVE, the store instructions VSTRB.U8, VSTRH.U16 and | ||||
18791 | // VSTRW.U32 all store the vector register in exactly the same format, and | ||||
18792 | // differ only in the range of their immediate offset field and the required | ||||
18793 | // alignment. So there is always a store that can be used, regardless of | ||||
18794 | // actual type. | ||||
18795 | // | ||||
18796 | // For big endian, that is not the case. But can still emit a (VSTRB.U8; | ||||
18797 | // VREV64.8) pair and get the same effect. This will likely be better than | ||||
18798 | // aligning the vector through the stack. | ||||
18799 | if (Ty == MVT::v16i8 || Ty == MVT::v8i16 || Ty == MVT::v8f16 || | ||||
18800 | Ty == MVT::v4i32 || Ty == MVT::v4f32 || Ty == MVT::v2i64 || | ||||
18801 | Ty == MVT::v2f64) { | ||||
18802 | if (Fast) | ||||
18803 | *Fast = true; | ||||
18804 | return true; | ||||
18805 | } | ||||
18806 | |||||
18807 | return false; | ||||
18808 | } | ||||
18809 | |||||
18810 | |||||
18811 | EVT ARMTargetLowering::getOptimalMemOpType( | ||||
18812 | const MemOp &Op, const AttributeList &FuncAttributes) const { | ||||
18813 | // See if we can use NEON instructions for this... | ||||
18814 | if ((Op.isMemcpy() || Op.isZeroMemset()) && Subtarget->hasNEON() && | ||||
18815 | !FuncAttributes.hasFnAttr(Attribute::NoImplicitFloat)) { | ||||
18816 | bool Fast; | ||||
18817 | if (Op.size() >= 16 && | ||||
18818 | (Op.isAligned(Align(16)) || | ||||
18819 | (allowsMisalignedMemoryAccesses(MVT::v2f64, 0, Align(1), | ||||
18820 | MachineMemOperand::MONone, &Fast) && | ||||
18821 | Fast))) { | ||||
18822 | return MVT::v2f64; | ||||
18823 | } else if (Op.size() >= 8 && | ||||
18824 | (Op.isAligned(Align(8)) || | ||||
18825 | (allowsMisalignedMemoryAccesses( | ||||
18826 | MVT::f64, 0, Align(1), MachineMemOperand::MONone, &Fast) && | ||||
18827 | Fast))) { | ||||
18828 | return MVT::f64; | ||||
18829 | } | ||||
18830 | } | ||||
18831 | |||||
18832 | // Let the target-independent logic figure it out. | ||||
18833 | return MVT::Other; | ||||
18834 | } | ||||
18835 | |||||
18836 | // 64-bit integers are split into their high and low parts and held in two | ||||
18837 | // different registers, so the trunc is free since the low register can just | ||||
18838 | // be used. | ||||
18839 | bool ARMTargetLowering::isTruncateFree(Type *SrcTy, Type *DstTy) const { | ||||
18840 | if (!SrcTy->isIntegerTy() || !DstTy->isIntegerTy()) | ||||
18841 | return false; | ||||
18842 | unsigned SrcBits = SrcTy->getPrimitiveSizeInBits(); | ||||
18843 | unsigned DestBits = DstTy->getPrimitiveSizeInBits(); | ||||
18844 | return (SrcBits == 64 && DestBits == 32); | ||||
18845 | } | ||||
18846 | |||||
18847 | bool ARMTargetLowering::isTruncateFree(EVT SrcVT, EVT DstVT) const { | ||||
18848 | if (SrcVT.isVector() || DstVT.isVector() || !SrcVT.isInteger() || | ||||
18849 | !DstVT.isInteger()) | ||||
18850 | return false; | ||||
18851 | unsigned SrcBits = SrcVT.getSizeInBits(); | ||||
18852 | unsigned DestBits = DstVT.getSizeInBits(); | ||||
18853 | return (SrcBits == 64 && DestBits == 32); | ||||
18854 | } | ||||
18855 | |||||
18856 | bool ARMTargetLowering::isZExtFree(SDValue Val, EVT VT2) const { | ||||
18857 | if (Val.getOpcode() != ISD::LOAD) | ||||
18858 | return false; | ||||
18859 | |||||
18860 | EVT VT1 = Val.getValueType(); | ||||
18861 | if (!VT1.isSimple() || !VT1.isInteger() || | ||||
18862 | !VT2.isSimple() || !VT2.isInteger()) | ||||
18863 | return false; | ||||
18864 | |||||
18865 | switch (VT1.getSimpleVT().SimpleTy) { | ||||
18866 | default: break; | ||||
18867 | case MVT::i1: | ||||
18868 | case MVT::i8: | ||||
18869 | case MVT::i16: | ||||
18870 | // 8-bit and 16-bit loads implicitly zero-extend to 32-bits. | ||||
18871 | return true; | ||||
18872 | } | ||||
18873 | |||||
18874 | return false; | ||||
18875 | } | ||||
18876 | |||||
18877 | bool ARMTargetLowering::isFNegFree(EVT VT) const { | ||||
18878 | if (!VT.isSimple()) | ||||
18879 | return false; | ||||
18880 | |||||
18881 | // There are quite a few FP16 instructions (e.g. VNMLA, VNMLS, etc.) that | ||||
18882 | // negate values directly (fneg is free). So, we don't want to let the DAG | ||||
18883 | // combiner rewrite fneg into xors and some other instructions. For f16 and | ||||
18884 | // FullFP16 argument passing, some bitcast nodes may be introduced, | ||||
18885 | // triggering this DAG combine rewrite, so we are avoiding that with this. | ||||
18886 | switch (VT.getSimpleVT().SimpleTy) { | ||||
18887 | default: break; | ||||
18888 | case MVT::f16: | ||||
18889 | return Subtarget->hasFullFP16(); | ||||
18890 | } | ||||
18891 | |||||
18892 | return false; | ||||
18893 | } | ||||
18894 | |||||
18895 | /// Check if Ext1 and Ext2 are extends of the same type, doubling the bitwidth | ||||
18896 | /// of the vector elements. | ||||
18897 | static bool areExtractExts(Value *Ext1, Value *Ext2) { | ||||
18898 | auto areExtDoubled = [](Instruction *Ext) { | ||||
18899 | return Ext->getType()->getScalarSizeInBits() == | ||||
18900 | 2 * Ext->getOperand(0)->getType()->getScalarSizeInBits(); | ||||
18901 | }; | ||||
18902 | |||||
18903 | if (!match(Ext1, m_ZExtOrSExt(m_Value())) || | ||||
18904 | !match(Ext2, m_ZExtOrSExt(m_Value())) || | ||||
18905 | !areExtDoubled(cast<Instruction>(Ext1)) || | ||||
18906 | !areExtDoubled(cast<Instruction>(Ext2))) | ||||
18907 | return false; | ||||
18908 | |||||
18909 | return true; | ||||
18910 | } | ||||
18911 | |||||
18912 | /// Check if sinking \p I's operands to I's basic block is profitable, because | ||||
18913 | /// the operands can be folded into a target instruction, e.g. | ||||
18914 | /// sext/zext can be folded into vsubl. | ||||
18915 | bool ARMTargetLowering::shouldSinkOperands(Instruction *I, | ||||
18916 | SmallVectorImpl<Use *> &Ops) const { | ||||
18917 | if (!I->getType()->isVectorTy()) | ||||
18918 | return false; | ||||
18919 | |||||
18920 | if (Subtarget->hasNEON()) { | ||||
18921 | switch (I->getOpcode()) { | ||||
18922 | case Instruction::Sub: | ||||
18923 | case Instruction::Add: { | ||||
18924 | if (!areExtractExts(I->getOperand(0), I->getOperand(1))) | ||||
18925 | return false; | ||||
18926 | Ops.push_back(&I->getOperandUse(0)); | ||||
18927 | Ops.push_back(&I->getOperandUse(1)); | ||||
18928 | return true; | ||||
18929 | } | ||||
18930 | default: | ||||
18931 | return false; | ||||
18932 | } | ||||
18933 | } | ||||
18934 | |||||
18935 | if (!Subtarget->hasMVEIntegerOps()) | ||||
18936 | return false; | ||||
18937 | |||||
18938 | auto IsFMSMul = [&](Instruction *I) { | ||||
18939 | if (!I->hasOneUse()) | ||||
18940 | return false; | ||||
18941 | auto *Sub = cast<Instruction>(*I->users().begin()); | ||||
18942 | return Sub->getOpcode() == Instruction::FSub && Sub->getOperand(1) == I; | ||||
18943 | }; | ||||
18944 | auto IsFMS = [&](Instruction *I) { | ||||
18945 | if (match(I->getOperand(0), m_FNeg(m_Value())) || | ||||
18946 | match(I->getOperand(1), m_FNeg(m_Value()))) | ||||
18947 | return true; | ||||
18948 | return false; | ||||
18949 | }; | ||||
18950 | |||||
18951 | auto IsSinker = [&](Instruction *I, int Operand) { | ||||
18952 | switch (I->getOpcode()) { | ||||
18953 | case Instruction::Add: | ||||
18954 | case Instruction::Mul: | ||||
18955 | case Instruction::FAdd: | ||||
18956 | case Instruction::ICmp: | ||||
18957 | case Instruction::FCmp: | ||||
18958 | return true; | ||||
18959 | case Instruction::FMul: | ||||
18960 | return !IsFMSMul(I); | ||||
18961 | case Instruction::Sub: | ||||
18962 | case Instruction::FSub: | ||||
18963 | case Instruction::Shl: | ||||
18964 | case Instruction::LShr: | ||||
18965 | case Instruction::AShr: | ||||
18966 | return Operand == 1; | ||||
18967 | case Instruction::Call: | ||||
18968 | if (auto *II = dyn_cast<IntrinsicInst>(I)) { | ||||
18969 | switch (II->getIntrinsicID()) { | ||||
18970 | case Intrinsic::fma: | ||||
18971 | return !IsFMS(I); | ||||
18972 | case Intrinsic::sadd_sat: | ||||
18973 | case Intrinsic::uadd_sat: | ||||
18974 | case Intrinsic::arm_mve_add_predicated: | ||||
18975 | case Intrinsic::arm_mve_mul_predicated: | ||||
18976 | case Intrinsic::arm_mve_qadd_predicated: | ||||
18977 | case Intrinsic::arm_mve_vhadd: | ||||
18978 | case Intrinsic::arm_mve_hadd_predicated: | ||||
18979 | case Intrinsic::arm_mve_vqdmull: | ||||
18980 | case Intrinsic::arm_mve_vqdmull_predicated: | ||||
18981 | case Intrinsic::arm_mve_vqdmulh: | ||||
18982 | case Intrinsic::arm_mve_qdmulh_predicated: | ||||
18983 | case Intrinsic::arm_mve_vqrdmulh: | ||||
18984 | case Intrinsic::arm_mve_qrdmulh_predicated: | ||||
18985 | case Intrinsic::arm_mve_fma_predicated: | ||||
18986 | return true; | ||||
18987 | case Intrinsic::ssub_sat: | ||||
18988 | case Intrinsic::usub_sat: | ||||
18989 | case Intrinsic::arm_mve_sub_predicated: | ||||
18990 | case Intrinsic::arm_mve_qsub_predicated: | ||||
18991 | case Intrinsic::arm_mve_hsub_predicated: | ||||
18992 | case Intrinsic::arm_mve_vhsub: | ||||
18993 | return Operand == 1; | ||||
18994 | default: | ||||
18995 | return false; | ||||
18996 | } | ||||
18997 | } | ||||
18998 | return false; | ||||
18999 | default: | ||||
19000 | return false; | ||||
19001 | } | ||||
19002 | }; | ||||
19003 | |||||
19004 | for (auto OpIdx : enumerate(I->operands())) { | ||||
19005 | Instruction *Op = dyn_cast<Instruction>(OpIdx.value().get()); | ||||
19006 | // Make sure we are not already sinking this operand | ||||
19007 | if (!Op || any_of(Ops, [&](Use *U) { return U->get() == Op; })) | ||||
19008 | continue; | ||||
19009 | |||||
19010 | Instruction *Shuffle = Op; | ||||
19011 | if (Shuffle->getOpcode() == Instruction::BitCast) | ||||
19012 | Shuffle = dyn_cast<Instruction>(Shuffle->getOperand(0)); | ||||
19013 | // We are looking for a splat that can be sunk. | ||||
19014 | if (!Shuffle || | ||||
19015 | !match(Shuffle, m_Shuffle( | ||||
19016 | m_InsertElt(m_Undef(), m_Value(), m_ZeroInt()), | ||||
19017 | m_Undef(), m_ZeroMask()))) | ||||
19018 | continue; | ||||
19019 | if (!IsSinker(I, OpIdx.index())) | ||||
19020 | continue; | ||||
19021 | |||||
19022 | // All uses of the shuffle should be sunk to avoid duplicating it across gpr | ||||
19023 | // and vector registers | ||||
19024 | for (Use &U : Op->uses()) { | ||||
19025 | Instruction *Insn = cast<Instruction>(U.getUser()); | ||||
19026 | if (!IsSinker(Insn, U.getOperandNo())) | ||||
19027 | return false; | ||||
19028 | } | ||||
19029 | |||||
19030 | Ops.push_back(&Shuffle->getOperandUse(0)); | ||||
19031 | if (Shuffle != Op) | ||||
19032 | Ops.push_back(&Op->getOperandUse(0)); | ||||
19033 | Ops.push_back(&OpIdx.value()); | ||||
19034 | } | ||||
19035 | return true; | ||||
19036 | } | ||||
19037 | |||||
19038 | Type *ARMTargetLowering::shouldConvertSplatType(ShuffleVectorInst *SVI) const { | ||||
19039 | if (!Subtarget->hasMVEIntegerOps()) | ||||
19040 | return nullptr; | ||||
19041 | Type *SVIType = SVI->getType(); | ||||
19042 | Type *ScalarType = SVIType->getScalarType(); | ||||
19043 | |||||
19044 | if (ScalarType->isFloatTy()) | ||||
19045 | return Type::getInt32Ty(SVIType->getContext()); | ||||
19046 | if (ScalarType->isHalfTy()) | ||||
19047 | return Type::getInt16Ty(SVIType->getContext()); | ||||
19048 | return nullptr; | ||||
19049 | } | ||||
19050 | |||||
19051 | bool ARMTargetLowering::isVectorLoadExtDesirable(SDValue ExtVal) const { | ||||
19052 | EVT VT = ExtVal.getValueType(); | ||||
19053 | |||||
19054 | if (!isTypeLegal(VT)) | ||||
19055 | return false; | ||||
19056 | |||||
19057 | if (auto *Ld = dyn_cast<MaskedLoadSDNode>(ExtVal.getOperand(0))) { | ||||
19058 | if (Ld->isExpandingLoad()) | ||||
19059 | return false; | ||||
19060 | } | ||||
19061 | |||||
19062 | if (Subtarget->hasMVEIntegerOps()) | ||||
19063 | return true; | ||||
19064 | |||||
19065 | // Don't create a loadext if we can fold the extension into a wide/long | ||||
19066 | // instruction. | ||||
19067 | // If there's more than one user instruction, the loadext is desirable no | ||||
19068 | // matter what. There can be two uses by the same instruction. | ||||
19069 | if (ExtVal->use_empty() || | ||||
19070 | !ExtVal->use_begin()->isOnlyUserOf(ExtVal.getNode())) | ||||
19071 | return true; | ||||
19072 | |||||
19073 | SDNode *U = *ExtVal->use_begin(); | ||||
19074 | if ((U->getOpcode() == ISD::ADD || U->getOpcode() == ISD::SUB || | ||||
19075 | U->getOpcode() == ISD::SHL || U->getOpcode() == ARMISD::VSHLIMM)) | ||||
19076 | return false; | ||||
19077 | |||||
19078 | return true; | ||||
19079 | } | ||||
19080 | |||||
19081 | bool ARMTargetLowering::allowTruncateForTailCall(Type *Ty1, Type *Ty2) const { | ||||
19082 | if (!Ty1->isIntegerTy() || !Ty2->isIntegerTy()) | ||||
19083 | return false; | ||||
19084 | |||||
19085 | if (!isTypeLegal(EVT::getEVT(Ty1))) | ||||
19086 | return false; | ||||
19087 | |||||
19088 | 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\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 19088, __extension__ __PRETTY_FUNCTION__)); | ||||
19089 | |||||
19090 | // Assuming the caller doesn't have a zeroext or signext return parameter, | ||||
19091 | // truncation all the way down to i1 is valid. | ||||
19092 | return true; | ||||
19093 | } | ||||
19094 | |||||
19095 | InstructionCost ARMTargetLowering::getScalingFactorCost(const DataLayout &DL, | ||||
19096 | const AddrMode &AM, | ||||
19097 | Type *Ty, | ||||
19098 | unsigned AS) const { | ||||
19099 | if (isLegalAddressingMode(DL, AM, Ty, AS)) { | ||||
19100 | if (Subtarget->hasFPAO()) | ||||
19101 | return AM.Scale < 0 ? 1 : 0; // positive offsets execute faster | ||||
19102 | return 0; | ||||
19103 | } | ||||
19104 | return -1; | ||||
19105 | } | ||||
19106 | |||||
19107 | /// isFMAFasterThanFMulAndFAdd - Return true if an FMA operation is faster | ||||
19108 | /// than a pair of fmul and fadd instructions. fmuladd intrinsics will be | ||||
19109 | /// expanded to FMAs when this method returns true, otherwise fmuladd is | ||||
19110 | /// expanded to fmul + fadd. | ||||
19111 | /// | ||||
19112 | /// ARM supports both fused and unfused multiply-add operations; we already | ||||
19113 | /// lower a pair of fmul and fadd to the latter so it's not clear that there | ||||
19114 | /// would be a gain or that the gain would be worthwhile enough to risk | ||||
19115 | /// correctness bugs. | ||||
19116 | /// | ||||
19117 | /// For MVE, we set this to true as it helps simplify the need for some | ||||
19118 | /// patterns (and we don't have the non-fused floating point instruction). | ||||
19119 | bool ARMTargetLowering::isFMAFasterThanFMulAndFAdd(const MachineFunction &MF, | ||||
19120 | EVT VT) const { | ||||
19121 | if (!VT.isSimple()) | ||||
19122 | return false; | ||||
19123 | |||||
19124 | switch (VT.getSimpleVT().SimpleTy) { | ||||
19125 | case MVT::v4f32: | ||||
19126 | case MVT::v8f16: | ||||
19127 | return Subtarget->hasMVEFloatOps(); | ||||
19128 | case MVT::f16: | ||||
19129 | return Subtarget->useFPVFMx16(); | ||||
19130 | case MVT::f32: | ||||
19131 | return Subtarget->useFPVFMx(); | ||||
19132 | case MVT::f64: | ||||
19133 | return Subtarget->useFPVFMx64(); | ||||
19134 | default: | ||||
19135 | break; | ||||
19136 | } | ||||
19137 | |||||
19138 | return false; | ||||
19139 | } | ||||
19140 | |||||
19141 | static bool isLegalT1AddressImmediate(int64_t V, EVT VT) { | ||||
19142 | if (V < 0) | ||||
19143 | return false; | ||||
19144 | |||||
19145 | unsigned Scale = 1; | ||||
19146 | switch (VT.getSimpleVT().SimpleTy) { | ||||
19147 | case MVT::i1: | ||||
19148 | case MVT::i8: | ||||
19149 | // Scale == 1; | ||||
19150 | break; | ||||
19151 | case MVT::i16: | ||||
19152 | // Scale == 2; | ||||
19153 | Scale = 2; | ||||
19154 | break; | ||||
19155 | default: | ||||
19156 | // On thumb1 we load most things (i32, i64, floats, etc) with a LDR | ||||
19157 | // Scale == 4; | ||||
19158 | Scale = 4; | ||||
19159 | break; | ||||
19160 | } | ||||
19161 | |||||
19162 | if ((V & (Scale - 1)) != 0) | ||||
19163 | return false; | ||||
19164 | return isUInt<5>(V / Scale); | ||||
19165 | } | ||||
19166 | |||||
19167 | static bool isLegalT2AddressImmediate(int64_t V, EVT VT, | ||||
19168 | const ARMSubtarget *Subtarget) { | ||||
19169 | if (!VT.isInteger() && !VT.isFloatingPoint()) | ||||
19170 | return false; | ||||
19171 | if (VT.isVector() && Subtarget->hasNEON()) | ||||
19172 | return false; | ||||
19173 | if (VT.isVector() && VT.isFloatingPoint() && Subtarget->hasMVEIntegerOps() && | ||||
19174 | !Subtarget->hasMVEFloatOps()) | ||||
19175 | return false; | ||||
19176 | |||||
19177 | bool IsNeg = false; | ||||
19178 | if (V < 0) { | ||||
19179 | IsNeg = true; | ||||
19180 | V = -V; | ||||
19181 | } | ||||
19182 | |||||
19183 | unsigned NumBytes = std::max((unsigned)VT.getSizeInBits() / 8, 1U); | ||||
19184 | |||||
19185 | // MVE: size * imm7 | ||||
19186 | if (VT.isVector() && Subtarget->hasMVEIntegerOps()) { | ||||
19187 | switch (VT.getSimpleVT().getVectorElementType().SimpleTy) { | ||||
19188 | case MVT::i32: | ||||
19189 | case MVT::f32: | ||||
19190 | return isShiftedUInt<7,2>(V); | ||||
19191 | case MVT::i16: | ||||
19192 | case MVT::f16: | ||||
19193 | return isShiftedUInt<7,1>(V); | ||||
19194 | case MVT::i8: | ||||
19195 | return isUInt<7>(V); | ||||
19196 | default: | ||||
19197 | return false; | ||||
19198 | } | ||||
19199 | } | ||||
19200 | |||||
19201 | // half VLDR: 2 * imm8 | ||||
19202 | if (VT.isFloatingPoint() && NumBytes == 2 && Subtarget->hasFPRegs16()) | ||||
19203 | return isShiftedUInt<8, 1>(V); | ||||
19204 | // VLDR and LDRD: 4 * imm8 | ||||
19205 | if ((VT.isFloatingPoint() && Subtarget->hasVFP2Base()) || NumBytes == 8) | ||||
19206 | return isShiftedUInt<8, 2>(V); | ||||
19207 | |||||
19208 | if (NumBytes == 1 || NumBytes == 2 || NumBytes == 4) { | ||||
19209 | // + imm12 or - imm8 | ||||
19210 | if (IsNeg) | ||||
19211 | return isUInt<8>(V); | ||||
19212 | return isUInt<12>(V); | ||||
19213 | } | ||||
19214 | |||||
19215 | return false; | ||||
19216 | } | ||||
19217 | |||||
19218 | /// isLegalAddressImmediate - Return true if the integer value can be used | ||||
19219 | /// as the offset of the target addressing mode for load / store of the | ||||
19220 | /// given type. | ||||
19221 | static bool isLegalAddressImmediate(int64_t V, EVT VT, | ||||
19222 | const ARMSubtarget *Subtarget) { | ||||
19223 | if (V == 0) | ||||
19224 | return true; | ||||
19225 | |||||
19226 | if (!VT.isSimple()) | ||||
19227 | return false; | ||||
19228 | |||||
19229 | if (Subtarget->isThumb1Only()) | ||||
19230 | return isLegalT1AddressImmediate(V, VT); | ||||
19231 | else if (Subtarget->isThumb2()) | ||||
19232 | return isLegalT2AddressImmediate(V, VT, Subtarget); | ||||
19233 | |||||
19234 | // ARM mode. | ||||
19235 | if (V < 0) | ||||
19236 | V = - V; | ||||
19237 | switch (VT.getSimpleVT().SimpleTy) { | ||||
19238 | default: return false; | ||||
19239 | case MVT::i1: | ||||
19240 | case MVT::i8: | ||||
19241 | case MVT::i32: | ||||
19242 | // +- imm12 | ||||
19243 | return isUInt<12>(V); | ||||
19244 | case MVT::i16: | ||||
19245 | // +- imm8 | ||||
19246 | return isUInt<8>(V); | ||||
19247 | case MVT::f32: | ||||
19248 | case MVT::f64: | ||||
19249 | if (!Subtarget->hasVFP2Base()) // FIXME: NEON? | ||||
19250 | return false; | ||||
19251 | return isShiftedUInt<8, 2>(V); | ||||
19252 | } | ||||
19253 | } | ||||
19254 | |||||
19255 | bool ARMTargetLowering::isLegalT2ScaledAddressingMode(const AddrMode &AM, | ||||
19256 | EVT VT) const { | ||||
19257 | int Scale = AM.Scale; | ||||
19258 | if (Scale < 0) | ||||
19259 | return false; | ||||
19260 | |||||
19261 | switch (VT.getSimpleVT().SimpleTy) { | ||||
19262 | default: return false; | ||||
19263 | case MVT::i1: | ||||
19264 | case MVT::i8: | ||||
19265 | case MVT::i16: | ||||
19266 | case MVT::i32: | ||||
19267 | if (Scale == 1) | ||||
19268 | return true; | ||||
19269 | // r + r << imm | ||||
19270 | Scale = Scale & ~1; | ||||
19271 | return Scale == 2 || Scale == 4 || Scale == 8; | ||||
19272 | case MVT::i64: | ||||
19273 | // FIXME: What are we trying to model here? ldrd doesn't have an r + r | ||||
19274 | // version in Thumb mode. | ||||
19275 | // r + r | ||||
19276 | if (Scale == 1) | ||||
19277 | return true; | ||||
19278 | // r * 2 (this can be lowered to r + r). | ||||
19279 | if (!AM.HasBaseReg && Scale == 2) | ||||
19280 | return true; | ||||
19281 | return false; | ||||
19282 | case MVT::isVoid: | ||||
19283 | // Note, we allow "void" uses (basically, uses that aren't loads or | ||||
19284 | // stores), because arm allows folding a scale into many arithmetic | ||||
19285 | // operations. This should be made more precise and revisited later. | ||||
19286 | |||||
19287 | // Allow r << imm, but the imm has to be a multiple of two. | ||||
19288 | if (Scale & 1) return false; | ||||
19289 | return isPowerOf2_32(Scale); | ||||
19290 | } | ||||
19291 | } | ||||
19292 | |||||
19293 | bool ARMTargetLowering::isLegalT1ScaledAddressingMode(const AddrMode &AM, | ||||
19294 | EVT VT) const { | ||||
19295 | const int Scale = AM.Scale; | ||||
19296 | |||||
19297 | // Negative scales are not supported in Thumb1. | ||||
19298 | if (Scale < 0) | ||||
19299 | return false; | ||||
19300 | |||||
19301 | // Thumb1 addressing modes do not support register scaling excepting the | ||||
19302 | // following cases: | ||||
19303 | // 1. Scale == 1 means no scaling. | ||||
19304 | // 2. Scale == 2 this can be lowered to r + r if there is no base register. | ||||
19305 | return (Scale == 1) || (!AM.HasBaseReg && Scale == 2); | ||||
19306 | } | ||||
19307 | |||||
19308 | /// isLegalAddressingMode - Return true if the addressing mode represented | ||||
19309 | /// by AM is legal for this target, for a load/store of the specified type. | ||||
19310 | bool ARMTargetLowering::isLegalAddressingMode(const DataLayout &DL, | ||||
19311 | const AddrMode &AM, Type *Ty, | ||||
19312 | unsigned AS, Instruction *I) const { | ||||
19313 | EVT VT = getValueType(DL, Ty, true); | ||||
19314 | if (!isLegalAddressImmediate(AM.BaseOffs, VT, Subtarget)) | ||||
19315 | return false; | ||||
19316 | |||||
19317 | // Can never fold addr of global into load/store. | ||||
19318 | if (AM.BaseGV) | ||||
19319 | return false; | ||||
19320 | |||||
19321 | switch (AM.Scale) { | ||||
19322 | case 0: // no scale reg, must be "r+i" or "r", or "i". | ||||
19323 | break; | ||||
19324 | default: | ||||
19325 | // ARM doesn't support any R+R*scale+imm addr modes. | ||||
19326 | if (AM.BaseOffs) | ||||
19327 | return false; | ||||
19328 | |||||
19329 | if (!VT.isSimple()) | ||||
19330 | return false; | ||||
19331 | |||||
19332 | if (Subtarget->isThumb1Only()) | ||||
19333 | return isLegalT1ScaledAddressingMode(AM, VT); | ||||
19334 | |||||
19335 | if (Subtarget->isThumb2()) | ||||
19336 | return isLegalT2ScaledAddressingMode(AM, VT); | ||||
19337 | |||||
19338 | int Scale = AM.Scale; | ||||
19339 | switch (VT.getSimpleVT().SimpleTy) { | ||||
19340 | default: return false; | ||||
19341 | case MVT::i1: | ||||
19342 | case MVT::i8: | ||||
19343 | case MVT::i32: | ||||
19344 | if (Scale < 0) Scale = -Scale; | ||||
19345 | if (Scale == 1) | ||||
19346 | return true; | ||||
19347 | // r + r << imm | ||||
19348 | return isPowerOf2_32(Scale & ~1); | ||||
19349 | case MVT::i16: | ||||
19350 | case MVT::i64: | ||||
19351 | // r +/- r | ||||
19352 | if (Scale == 1 || (AM.HasBaseReg && Scale == -1)) | ||||
19353 | return true; | ||||
19354 | // r * 2 (this can be lowered to r + r). | ||||
19355 | if (!AM.HasBaseReg && Scale == 2) | ||||
19356 | return true; | ||||
19357 | return false; | ||||
19358 | |||||
19359 | case MVT::isVoid: | ||||
19360 | // Note, we allow "void" uses (basically, uses that aren't loads or | ||||
19361 | // stores), because arm allows folding a scale into many arithmetic | ||||
19362 | // operations. This should be made more precise and revisited later. | ||||
19363 | |||||
19364 | // Allow r << imm, but the imm has to be a multiple of two. | ||||
19365 | if (Scale & 1) return false; | ||||
19366 | return isPowerOf2_32(Scale); | ||||
19367 | } | ||||
19368 | } | ||||
19369 | return true; | ||||
19370 | } | ||||
19371 | |||||
19372 | /// isLegalICmpImmediate - Return true if the specified immediate is legal | ||||
19373 | /// icmp immediate, that is the target has icmp instructions which can compare | ||||
19374 | /// a register against the immediate without having to materialize the | ||||
19375 | /// immediate into a register. | ||||
19376 | bool ARMTargetLowering::isLegalICmpImmediate(int64_t Imm) const { | ||||
19377 | // Thumb2 and ARM modes can use cmn for negative immediates. | ||||
19378 | if (!Subtarget->isThumb()) | ||||
19379 | return ARM_AM::getSOImmVal((uint32_t)Imm) != -1 || | ||||
19380 | ARM_AM::getSOImmVal(-(uint32_t)Imm) != -1; | ||||
19381 | if (Subtarget->isThumb2()) | ||||
19382 | return ARM_AM::getT2SOImmVal((uint32_t)Imm) != -1 || | ||||
19383 | ARM_AM::getT2SOImmVal(-(uint32_t)Imm) != -1; | ||||
19384 | // Thumb1 doesn't have cmn, and only 8-bit immediates. | ||||
19385 | return Imm >= 0 && Imm <= 255; | ||||
19386 | } | ||||
19387 | |||||
19388 | /// isLegalAddImmediate - Return true if the specified immediate is a legal add | ||||
19389 | /// *or sub* immediate, that is the target has add or sub instructions which can | ||||
19390 | /// add a register with the immediate without having to materialize the | ||||
19391 | /// immediate into a register. | ||||
19392 | bool ARMTargetLowering::isLegalAddImmediate(int64_t Imm) const { | ||||
19393 | // Same encoding for add/sub, just flip the sign. | ||||
19394 | int64_t AbsImm = std::abs(Imm); | ||||
19395 | if (!Subtarget->isThumb()) | ||||
19396 | return ARM_AM::getSOImmVal(AbsImm) != -1; | ||||
19397 | if (Subtarget->isThumb2()) | ||||
19398 | return ARM_AM::getT2SOImmVal(AbsImm) != -1; | ||||
19399 | // Thumb1 only has 8-bit unsigned immediate. | ||||
19400 | return AbsImm >= 0 && AbsImm <= 255; | ||||
19401 | } | ||||
19402 | |||||
19403 | // Return false to prevent folding | ||||
19404 | // (mul (add r, c0), c1) -> (add (mul r, c1), c0*c1) in DAGCombine, | ||||
19405 | // if the folding leads to worse code. | ||||
19406 | bool ARMTargetLowering::isMulAddWithConstProfitable(SDValue AddNode, | ||||
19407 | SDValue ConstNode) const { | ||||
19408 | // Let the DAGCombiner decide for vector types and large types. | ||||
19409 | const EVT VT = AddNode.getValueType(); | ||||
19410 | if (VT.isVector() || VT.getScalarSizeInBits() > 32) | ||||
19411 | return true; | ||||
19412 | |||||
19413 | // It is worse if c0 is legal add immediate, while c1*c0 is not | ||||
19414 | // and has to be composed by at least two instructions. | ||||
19415 | const ConstantSDNode *C0Node = cast<ConstantSDNode>(AddNode.getOperand(1)); | ||||
19416 | const ConstantSDNode *C1Node = cast<ConstantSDNode>(ConstNode); | ||||
19417 | const int64_t C0 = C0Node->getSExtValue(); | ||||
19418 | APInt CA = C0Node->getAPIntValue() * C1Node->getAPIntValue(); | ||||
19419 | if (!isLegalAddImmediate(C0) || isLegalAddImmediate(CA.getSExtValue())) | ||||
19420 | return true; | ||||
19421 | if (ConstantMaterializationCost((unsigned)CA.getZExtValue(), Subtarget) > 1) | ||||
19422 | return false; | ||||
19423 | |||||
19424 | // Default to true and let the DAGCombiner decide. | ||||
19425 | return true; | ||||
19426 | } | ||||
19427 | |||||
19428 | static bool getARMIndexedAddressParts(SDNode *Ptr, EVT VT, | ||||
19429 | bool isSEXTLoad, SDValue &Base, | ||||
19430 | SDValue &Offset, bool &isInc, | ||||
19431 | SelectionDAG &DAG) { | ||||
19432 | if (Ptr->getOpcode() != ISD::ADD && Ptr->getOpcode() != ISD::SUB) | ||||
19433 | return false; | ||||
19434 | |||||
19435 | if (VT == MVT::i16 || ((VT == MVT::i8 || VT == MVT::i1) && isSEXTLoad)) { | ||||
19436 | // AddressingMode 3 | ||||
19437 | Base = Ptr->getOperand(0); | ||||
19438 | if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(Ptr->getOperand(1))) { | ||||
19439 | int RHSC = (int)RHS->getZExtValue(); | ||||
19440 | if (RHSC < 0 && RHSC > -256) { | ||||
19441 | assert(Ptr->getOpcode() == ISD::ADD)(static_cast <bool> (Ptr->getOpcode() == ISD::ADD) ? void (0) : __assert_fail ("Ptr->getOpcode() == ISD::ADD", "llvm/lib/Target/ARM/ARMISelLowering.cpp", 19441, __extension__ __PRETTY_FUNCTION__)); | ||||
19442 | isInc = false; | ||||
19443 | Offset = DAG.getConstant(-RHSC, SDLoc(Ptr), RHS->getValueType(0)); | ||||
19444 | return true; | ||||
19445 | } | ||||
19446 | } | ||||
19447 | isInc = (Ptr->getOpcode() == ISD::ADD); | ||||
19448 | Offset = Ptr->getOperand(1); | ||||
19449 | return true; | ||||
19450 | } else if (VT == MVT::i32 || VT == MVT::i8 || VT == MVT::i1) { | ||||
19451 | // AddressingMode 2 | ||||
19452 | if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(Ptr->getOperand(1))) { | ||||
19453 | int RHSC = (int)RHS->getZExtValue(); | ||||
19454 | if (RHSC < 0 && RHSC > -0x1000) { | ||||
19455 | assert(Ptr->getOpcode() == ISD::ADD)(static_cast <bool> (Ptr->getOpcode() == ISD::ADD) ? void (0) : __assert_fail ("Ptr->getOpcode() == ISD::ADD", "llvm/lib/Target/ARM/ARMISelLowering.cpp", 19455, __extension__ __PRETTY_FUNCTION__)); | ||||
19456 | isInc = false; | ||||
19457 | Offset = DAG.getConstant(-RHSC, SDLoc(Ptr), RHS->getValueType(0)); | ||||
19458 | Base = Ptr->getOperand(0); | ||||
19459 | return true; | ||||
19460 | } | ||||
19461 | } | ||||
19462 | |||||
19463 | if (Ptr->getOpcode() == ISD::ADD) { | ||||
19464 | isInc = true; | ||||
19465 | ARM_AM::ShiftOpc ShOpcVal= | ||||
19466 | ARM_AM::getShiftOpcForNode(Ptr->getOperand(0).getOpcode()); | ||||
19467 | if (ShOpcVal != ARM_AM::no_shift) { | ||||
19468 | Base = Ptr->getOperand(1); | ||||
19469 | Offset = Ptr->getOperand(0); | ||||
19470 | } else { | ||||
19471 | Base = Ptr->getOperand(0); | ||||
19472 | Offset = Ptr->getOperand(1); | ||||
19473 | } | ||||
19474 | return true; | ||||
19475 | } | ||||
19476 | |||||
19477 | isInc = (Ptr->getOpcode() == ISD::ADD); | ||||
19478 | Base = Ptr->getOperand(0); | ||||
19479 | Offset = Ptr->getOperand(1); | ||||
19480 | return true; | ||||
19481 | } | ||||
19482 | |||||
19483 | // FIXME: Use VLDM / VSTM to emulate indexed FP load / store. | ||||
19484 | return false; | ||||
19485 | } | ||||
19486 | |||||
19487 | static bool getT2IndexedAddressParts(SDNode *Ptr, EVT VT, | ||||
19488 | bool isSEXTLoad, SDValue &Base, | ||||
19489 | SDValue &Offset, bool &isInc, | ||||
19490 | SelectionDAG &DAG) { | ||||
19491 | if (Ptr->getOpcode() != ISD::ADD && Ptr->getOpcode() != ISD::SUB) | ||||
19492 | return false; | ||||
19493 | |||||
19494 | Base = Ptr->getOperand(0); | ||||
19495 | if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(Ptr->getOperand(1))) { | ||||
19496 | int RHSC = (int)RHS->getZExtValue(); | ||||
19497 | if (RHSC < 0 && RHSC > -0x100) { // 8 bits. | ||||
19498 | assert(Ptr->getOpcode() == ISD::ADD)(static_cast <bool> (Ptr->getOpcode() == ISD::ADD) ? void (0) : __assert_fail ("Ptr->getOpcode() == ISD::ADD", "llvm/lib/Target/ARM/ARMISelLowering.cpp", 19498, __extension__ __PRETTY_FUNCTION__)); | ||||
19499 | isInc = false; | ||||
19500 | Offset = DAG.getConstant(-RHSC, SDLoc(Ptr), RHS->getValueType(0)); | ||||
19501 | return true; | ||||
19502 | } else if (RHSC > 0 && RHSC < 0x100) { // 8 bit, no zero. | ||||
19503 | isInc = Ptr->getOpcode() == ISD::ADD; | ||||
19504 | Offset = DAG.getConstant(RHSC, SDLoc(Ptr), RHS->getValueType(0)); | ||||
19505 | return true; | ||||
19506 | } | ||||
19507 | } | ||||
19508 | |||||
19509 | return false; | ||||
19510 | } | ||||
19511 | |||||
19512 | static bool getMVEIndexedAddressParts(SDNode *Ptr, EVT VT, Align Alignment, | ||||
19513 | bool isSEXTLoad, bool IsMasked, bool isLE, | ||||
19514 | SDValue &Base, SDValue &Offset, | ||||
19515 | bool &isInc, SelectionDAG &DAG) { | ||||
19516 | if (Ptr->getOpcode() != ISD::ADD && Ptr->getOpcode() != ISD::SUB) | ||||
19517 | return false; | ||||
19518 | if (!isa<ConstantSDNode>(Ptr->getOperand(1))) | ||||
19519 | return false; | ||||
19520 | |||||
19521 | // We allow LE non-masked loads to change the type (for example use a vldrb.8 | ||||
19522 | // as opposed to a vldrw.32). This can allow extra addressing modes or | ||||
19523 | // alignments for what is otherwise an equivalent instruction. | ||||
19524 | bool CanChangeType = isLE && !IsMasked; | ||||
19525 | |||||
19526 | ConstantSDNode *RHS = cast<ConstantSDNode>(Ptr->getOperand(1)); | ||||
19527 | int RHSC = (int)RHS->getZExtValue(); | ||||
19528 | |||||
19529 | auto IsInRange = [&](int RHSC, int Limit, int Scale) { | ||||
19530 | if (RHSC < 0 && RHSC > -Limit * Scale && RHSC % Scale == 0) { | ||||
19531 | assert(Ptr->getOpcode() == ISD::ADD)(static_cast <bool> (Ptr->getOpcode() == ISD::ADD) ? void (0) : __assert_fail ("Ptr->getOpcode() == ISD::ADD", "llvm/lib/Target/ARM/ARMISelLowering.cpp", 19531, __extension__ __PRETTY_FUNCTION__)); | ||||
19532 | isInc = false; | ||||
19533 | Offset = DAG.getConstant(-RHSC, SDLoc(Ptr), RHS->getValueType(0)); | ||||
19534 | return true; | ||||
19535 | } else if (RHSC > 0 && RHSC < Limit * Scale && RHSC % Scale == 0) { | ||||
19536 | isInc = Ptr->getOpcode() == ISD::ADD; | ||||
19537 | Offset = DAG.getConstant(RHSC, SDLoc(Ptr), RHS->getValueType(0)); | ||||
19538 | return true; | ||||
19539 | } | ||||
19540 | return false; | ||||
19541 | }; | ||||
19542 | |||||
19543 | // Try to find a matching instruction based on s/zext, Alignment, Offset and | ||||
19544 | // (in BE/masked) type. | ||||
19545 | Base = Ptr->getOperand(0); | ||||
19546 | if (VT == MVT::v4i16) { | ||||
19547 | if (Alignment >= 2 && IsInRange(RHSC, 0x80, 2)) | ||||
19548 | return true; | ||||
19549 | } else if (VT == MVT::v4i8 || VT == MVT::v8i8) { | ||||
19550 | if (IsInRange(RHSC, 0x80, 1)) | ||||
19551 | return true; | ||||
19552 | } else if (Alignment >= 4 && | ||||
19553 | (CanChangeType || VT == MVT::v4i32 || VT == MVT::v4f32) && | ||||
19554 | IsInRange(RHSC, 0x80, 4)) | ||||
19555 | return true; | ||||
19556 | else if (Alignment >= 2 && | ||||
19557 | (CanChangeType || VT == MVT::v8i16 || VT == MVT::v8f16) && | ||||
19558 | IsInRange(RHSC, 0x80, 2)) | ||||
19559 | return true; | ||||
19560 | else if ((CanChangeType || VT == MVT::v16i8) && IsInRange(RHSC, 0x80, 1)) | ||||
19561 | return true; | ||||
19562 | return false; | ||||
19563 | } | ||||
19564 | |||||
19565 | /// getPreIndexedAddressParts - returns true by value, base pointer and | ||||
19566 | /// offset pointer and addressing mode by reference if the node's address | ||||
19567 | /// can be legally represented as pre-indexed load / store address. | ||||
19568 | bool | ||||
19569 | ARMTargetLowering::getPreIndexedAddressParts(SDNode *N, SDValue &Base, | ||||
19570 | SDValue &Offset, | ||||
19571 | ISD::MemIndexedMode &AM, | ||||
19572 | SelectionDAG &DAG) const { | ||||
19573 | if (Subtarget->isThumb1Only()) | ||||
19574 | return false; | ||||
19575 | |||||
19576 | EVT VT; | ||||
19577 | SDValue Ptr; | ||||
19578 | Align Alignment; | ||||
19579 | bool isSEXTLoad = false; | ||||
19580 | bool IsMasked = false; | ||||
19581 | if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) { | ||||
19582 | Ptr = LD->getBasePtr(); | ||||
19583 | VT = LD->getMemoryVT(); | ||||
19584 | Alignment = LD->getAlign(); | ||||
19585 | isSEXTLoad = LD->getExtensionType() == ISD::SEXTLOAD; | ||||
19586 | } else if (StoreSDNode *ST = dyn_cast<StoreSDNode>(N)) { | ||||
19587 | Ptr = ST->getBasePtr(); | ||||
19588 | VT = ST->getMemoryVT(); | ||||
19589 | Alignment = ST->getAlign(); | ||||
19590 | } else if (MaskedLoadSDNode *LD = dyn_cast<MaskedLoadSDNode>(N)) { | ||||
19591 | Ptr = LD->getBasePtr(); | ||||
19592 | VT = LD->getMemoryVT(); | ||||
19593 | Alignment = LD->getAlign(); | ||||
19594 | isSEXTLoad = LD->getExtensionType() == ISD::SEXTLOAD; | ||||
19595 | IsMasked = true; | ||||
19596 | } else if (MaskedStoreSDNode *ST = dyn_cast<MaskedStoreSDNode>(N)) { | ||||
19597 | Ptr = ST->getBasePtr(); | ||||
19598 | VT = ST->getMemoryVT(); | ||||
19599 | Alignment = ST->getAlign(); | ||||
19600 | IsMasked = true; | ||||
19601 | } else | ||||
19602 | return false; | ||||
19603 | |||||
19604 | bool isInc; | ||||
19605 | bool isLegal = false; | ||||
19606 | if (VT.isVector()) | ||||
19607 | isLegal = Subtarget->hasMVEIntegerOps() && | ||||
19608 | getMVEIndexedAddressParts( | ||||
19609 | Ptr.getNode(), VT, Alignment, isSEXTLoad, IsMasked, | ||||
19610 | Subtarget->isLittle(), Base, Offset, isInc, DAG); | ||||
19611 | else { | ||||
19612 | if (Subtarget->isThumb2()) | ||||
19613 | isLegal = getT2IndexedAddressParts(Ptr.getNode(), VT, isSEXTLoad, Base, | ||||
19614 | Offset, isInc, DAG); | ||||
19615 | else | ||||
19616 | isLegal = getARMIndexedAddressParts(Ptr.getNode(), VT, isSEXTLoad, Base, | ||||
19617 | Offset, isInc, DAG); | ||||
19618 | } | ||||
19619 | if (!isLegal) | ||||
19620 | return false; | ||||
19621 | |||||
19622 | AM = isInc ? ISD::PRE_INC : ISD::PRE_DEC; | ||||
19623 | return true; | ||||
19624 | } | ||||
19625 | |||||
19626 | /// getPostIndexedAddressParts - returns true by value, base pointer and | ||||
19627 | /// offset pointer and addressing mode by reference if this node can be | ||||
19628 | /// combined with a load / store to form a post-indexed load / store. | ||||
19629 | bool ARMTargetLowering::getPostIndexedAddressParts(SDNode *N, SDNode *Op, | ||||
19630 | SDValue &Base, | ||||
19631 | SDValue &Offset, | ||||
19632 | ISD::MemIndexedMode &AM, | ||||
19633 | SelectionDAG &DAG) const { | ||||
19634 | EVT VT; | ||||
19635 | SDValue Ptr; | ||||
19636 | Align Alignment; | ||||
19637 | bool isSEXTLoad = false, isNonExt; | ||||
19638 | bool IsMasked = false; | ||||
19639 | if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) { | ||||
19640 | VT = LD->getMemoryVT(); | ||||
19641 | Ptr = LD->getBasePtr(); | ||||
19642 | Alignment = LD->getAlign(); | ||||
19643 | isSEXTLoad = LD->getExtensionType() == ISD::SEXTLOAD; | ||||
19644 | isNonExt = LD->getExtensionType() == ISD::NON_EXTLOAD; | ||||
19645 | } else if (StoreSDNode *ST = dyn_cast<StoreSDNode>(N)) { | ||||
19646 | VT = ST->getMemoryVT(); | ||||
19647 | Ptr = ST->getBasePtr(); | ||||
19648 | Alignment = ST->getAlign(); | ||||
19649 | isNonExt = !ST->isTruncatingStore(); | ||||
19650 | } else if (MaskedLoadSDNode *LD = dyn_cast<MaskedLoadSDNode>(N)) { | ||||
19651 | VT = LD->getMemoryVT(); | ||||
19652 | Ptr = LD->getBasePtr(); | ||||
19653 | Alignment = LD->getAlign(); | ||||
19654 | isSEXTLoad = LD->getExtensionType() == ISD::SEXTLOAD; | ||||
19655 | isNonExt = LD->getExtensionType() == ISD::NON_EXTLOAD; | ||||
19656 | IsMasked = true; | ||||
19657 | } else if (MaskedStoreSDNode *ST = dyn_cast<MaskedStoreSDNode>(N)) { | ||||
19658 | VT = ST->getMemoryVT(); | ||||
19659 | Ptr = ST->getBasePtr(); | ||||
19660 | Alignment = ST->getAlign(); | ||||
19661 | isNonExt = !ST->isTruncatingStore(); | ||||
19662 | IsMasked = true; | ||||
19663 | } else | ||||
19664 | return false; | ||||
19665 | |||||
19666 | if (Subtarget->isThumb1Only()) { | ||||
19667 | // Thumb-1 can do a limited post-inc load or store as an updating LDM. It | ||||
19668 | // must be non-extending/truncating, i32, with an offset of 4. | ||||
19669 | assert(Op->getValueType(0) == MVT::i32 && "Non-i32 post-inc op?!")(static_cast <bool> (Op->getValueType(0) == MVT::i32 && "Non-i32 post-inc op?!") ? void (0) : __assert_fail ("Op->getValueType(0) == MVT::i32 && \"Non-i32 post-inc op?!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 19669, __extension__ __PRETTY_FUNCTION__)); | ||||
19670 | if (Op->getOpcode() != ISD::ADD || !isNonExt) | ||||
19671 | return false; | ||||
19672 | auto *RHS = dyn_cast<ConstantSDNode>(Op->getOperand(1)); | ||||
19673 | if (!RHS || RHS->getZExtValue() != 4) | ||||
19674 | return false; | ||||
19675 | if (Alignment < Align(4)) | ||||
19676 | return false; | ||||
19677 | |||||
19678 | Offset = Op->getOperand(1); | ||||
19679 | Base = Op->getOperand(0); | ||||
19680 | AM = ISD::POST_INC; | ||||
19681 | return true; | ||||
19682 | } | ||||
19683 | |||||
19684 | bool isInc; | ||||
19685 | bool isLegal = false; | ||||
19686 | if (VT.isVector()) | ||||
19687 | isLegal = Subtarget->hasMVEIntegerOps() && | ||||
19688 | getMVEIndexedAddressParts(Op, VT, Alignment, isSEXTLoad, IsMasked, | ||||
19689 | Subtarget->isLittle(), Base, Offset, | ||||
19690 | isInc, DAG); | ||||
19691 | else { | ||||
19692 | if (Subtarget->isThumb2()) | ||||
19693 | isLegal = getT2IndexedAddressParts(Op, VT, isSEXTLoad, Base, Offset, | ||||
19694 | isInc, DAG); | ||||
19695 | else | ||||
19696 | isLegal = getARMIndexedAddressParts(Op, VT, isSEXTLoad, Base, Offset, | ||||
19697 | isInc, DAG); | ||||
19698 | } | ||||
19699 | if (!isLegal) | ||||
19700 | return false; | ||||
19701 | |||||
19702 | if (Ptr != Base) { | ||||
19703 | // Swap base ptr and offset to catch more post-index load / store when | ||||
19704 | // it's legal. In Thumb2 mode, offset must be an immediate. | ||||
19705 | if (Ptr == Offset && Op->getOpcode() == ISD::ADD && | ||||
19706 | !Subtarget->isThumb2()) | ||||
19707 | std::swap(Base, Offset); | ||||
19708 | |||||
19709 | // Post-indexed load / store update the base pointer. | ||||
19710 | if (Ptr != Base) | ||||
19711 | return false; | ||||
19712 | } | ||||
19713 | |||||
19714 | AM = isInc ? ISD::POST_INC : ISD::POST_DEC; | ||||
19715 | return true; | ||||
19716 | } | ||||
19717 | |||||
19718 | void ARMTargetLowering::computeKnownBitsForTargetNode(const SDValue Op, | ||||
19719 | KnownBits &Known, | ||||
19720 | const APInt &DemandedElts, | ||||
19721 | const SelectionDAG &DAG, | ||||
19722 | unsigned Depth) const { | ||||
19723 | unsigned BitWidth = Known.getBitWidth(); | ||||
19724 | Known.resetAll(); | ||||
19725 | switch (Op.getOpcode()) { | ||||
19726 | default: break; | ||||
19727 | case ARMISD::ADDC: | ||||
19728 | case ARMISD::ADDE: | ||||
19729 | case ARMISD::SUBC: | ||||
19730 | case ARMISD::SUBE: | ||||
19731 | // Special cases when we convert a carry to a boolean. | ||||
19732 | if (Op.getResNo() == 0) { | ||||
19733 | SDValue LHS = Op.getOperand(0); | ||||
19734 | SDValue RHS = Op.getOperand(1); | ||||
19735 | // (ADDE 0, 0, C) will give us a single bit. | ||||
19736 | if (Op->getOpcode() == ARMISD::ADDE && isNullConstant(LHS) && | ||||
19737 | isNullConstant(RHS)) { | ||||
19738 | Known.Zero |= APInt::getHighBitsSet(BitWidth, BitWidth - 1); | ||||
19739 | return; | ||||
19740 | } | ||||
19741 | } | ||||
19742 | break; | ||||
19743 | case ARMISD::CMOV: { | ||||
19744 | // Bits are known zero/one if known on the LHS and RHS. | ||||
19745 | Known = DAG.computeKnownBits(Op.getOperand(0), Depth+1); | ||||
19746 | if (Known.isUnknown()) | ||||
19747 | return; | ||||
19748 | |||||
19749 | KnownBits KnownRHS = DAG.computeKnownBits(Op.getOperand(1), Depth+1); | ||||
19750 | Known = KnownBits::commonBits(Known, KnownRHS); | ||||
19751 | return; | ||||
19752 | } | ||||
19753 | case ISD::INTRINSIC_W_CHAIN: { | ||||
19754 | ConstantSDNode *CN = cast<ConstantSDNode>(Op->getOperand(1)); | ||||
19755 | Intrinsic::ID IntID = static_cast<Intrinsic::ID>(CN->getZExtValue()); | ||||
19756 | switch (IntID) { | ||||
19757 | default: return; | ||||
19758 | case Intrinsic::arm_ldaex: | ||||
19759 | case Intrinsic::arm_ldrex: { | ||||
19760 | EVT VT = cast<MemIntrinsicSDNode>(Op)->getMemoryVT(); | ||||
19761 | unsigned MemBits = VT.getScalarSizeInBits(); | ||||
19762 | Known.Zero |= APInt::getHighBitsSet(BitWidth, BitWidth - MemBits); | ||||
19763 | return; | ||||
19764 | } | ||||
19765 | } | ||||
19766 | } | ||||
19767 | case ARMISD::BFI: { | ||||
19768 | // Conservatively, we can recurse down the first operand | ||||
19769 | // and just mask out all affected bits. | ||||
19770 | Known = DAG.computeKnownBits(Op.getOperand(0), Depth + 1); | ||||
19771 | |||||
19772 | // The operand to BFI is already a mask suitable for removing the bits it | ||||
19773 | // sets. | ||||
19774 | ConstantSDNode *CI = cast<ConstantSDNode>(Op.getOperand(2)); | ||||
19775 | const APInt &Mask = CI->getAPIntValue(); | ||||
19776 | Known.Zero &= Mask; | ||||
19777 | Known.One &= Mask; | ||||
19778 | return; | ||||
19779 | } | ||||
19780 | case ARMISD::VGETLANEs: | ||||
19781 | case ARMISD::VGETLANEu: { | ||||
19782 | const SDValue &SrcSV = Op.getOperand(0); | ||||
19783 | EVT VecVT = SrcSV.getValueType(); | ||||
19784 | assert(VecVT.isVector() && "VGETLANE expected a vector type")(static_cast <bool> (VecVT.isVector() && "VGETLANE expected a vector type" ) ? void (0) : __assert_fail ("VecVT.isVector() && \"VGETLANE expected a vector type\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 19784, __extension__ __PRETTY_FUNCTION__)); | ||||
19785 | const unsigned NumSrcElts = VecVT.getVectorNumElements(); | ||||
19786 | ConstantSDNode *Pos = cast<ConstantSDNode>(Op.getOperand(1).getNode()); | ||||
19787 | assert(Pos->getAPIntValue().ult(NumSrcElts) &&(static_cast <bool> (Pos->getAPIntValue().ult(NumSrcElts ) && "VGETLANE index out of bounds") ? void (0) : __assert_fail ("Pos->getAPIntValue().ult(NumSrcElts) && \"VGETLANE index out of bounds\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 19788, __extension__ __PRETTY_FUNCTION__)) | ||||
19788 | "VGETLANE index out of bounds")(static_cast <bool> (Pos->getAPIntValue().ult(NumSrcElts ) && "VGETLANE index out of bounds") ? void (0) : __assert_fail ("Pos->getAPIntValue().ult(NumSrcElts) && \"VGETLANE index out of bounds\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 19788, __extension__ __PRETTY_FUNCTION__)); | ||||
19789 | unsigned Idx = Pos->getZExtValue(); | ||||
19790 | APInt DemandedElt = APInt::getOneBitSet(NumSrcElts, Idx); | ||||
19791 | Known = DAG.computeKnownBits(SrcSV, DemandedElt, Depth + 1); | ||||
19792 | |||||
19793 | EVT VT = Op.getValueType(); | ||||
19794 | const unsigned DstSz = VT.getScalarSizeInBits(); | ||||
19795 | const unsigned SrcSz = VecVT.getVectorElementType().getSizeInBits(); | ||||
19796 | (void)SrcSz; | ||||
19797 | assert(SrcSz == Known.getBitWidth())(static_cast <bool> (SrcSz == Known.getBitWidth()) ? void (0) : __assert_fail ("SrcSz == Known.getBitWidth()", "llvm/lib/Target/ARM/ARMISelLowering.cpp" , 19797, __extension__ __PRETTY_FUNCTION__)); | ||||
19798 | assert(DstSz > SrcSz)(static_cast <bool> (DstSz > SrcSz) ? void (0) : __assert_fail ("DstSz > SrcSz", "llvm/lib/Target/ARM/ARMISelLowering.cpp" , 19798, __extension__ __PRETTY_FUNCTION__)); | ||||
19799 | if (Op.getOpcode() == ARMISD::VGETLANEs) | ||||
19800 | Known = Known.sext(DstSz); | ||||
19801 | else { | ||||
19802 | Known = Known.zext(DstSz); | ||||
19803 | } | ||||
19804 | assert(DstSz == Known.getBitWidth())(static_cast <bool> (DstSz == Known.getBitWidth()) ? void (0) : __assert_fail ("DstSz == Known.getBitWidth()", "llvm/lib/Target/ARM/ARMISelLowering.cpp" , 19804, __extension__ __PRETTY_FUNCTION__)); | ||||
19805 | break; | ||||
19806 | } | ||||
19807 | case ARMISD::VMOVrh: { | ||||
19808 | KnownBits KnownOp = DAG.computeKnownBits(Op->getOperand(0), Depth + 1); | ||||
19809 | assert(KnownOp.getBitWidth() == 16)(static_cast <bool> (KnownOp.getBitWidth() == 16) ? void (0) : __assert_fail ("KnownOp.getBitWidth() == 16", "llvm/lib/Target/ARM/ARMISelLowering.cpp" , 19809, __extension__ __PRETTY_FUNCTION__)); | ||||
19810 | Known = KnownOp.zext(32); | ||||
19811 | break; | ||||
19812 | } | ||||
19813 | case ARMISD::CSINC: | ||||
19814 | case ARMISD::CSINV: | ||||
19815 | case ARMISD::CSNEG: { | ||||
19816 | KnownBits KnownOp0 = DAG.computeKnownBits(Op->getOperand(0), Depth + 1); | ||||
19817 | KnownBits KnownOp1 = DAG.computeKnownBits(Op->getOperand(1), Depth + 1); | ||||
19818 | |||||
19819 | // The result is either: | ||||
19820 | // CSINC: KnownOp0 or KnownOp1 + 1 | ||||
19821 | // CSINV: KnownOp0 or ~KnownOp1 | ||||
19822 | // CSNEG: KnownOp0 or KnownOp1 * -1 | ||||
19823 | if (Op.getOpcode() == ARMISD::CSINC) | ||||
19824 | KnownOp1 = KnownBits::computeForAddSub( | ||||
19825 | true, false, KnownOp1, KnownBits::makeConstant(APInt(32, 1))); | ||||
19826 | else if (Op.getOpcode() == ARMISD::CSINV) | ||||
19827 | std::swap(KnownOp1.Zero, KnownOp1.One); | ||||
19828 | else if (Op.getOpcode() == ARMISD::CSNEG) | ||||
19829 | KnownOp1 = KnownBits::mul( | ||||
19830 | KnownOp1, KnownBits::makeConstant(APInt(32, -1))); | ||||
19831 | |||||
19832 | Known = KnownBits::commonBits(KnownOp0, KnownOp1); | ||||
19833 | break; | ||||
19834 | } | ||||
19835 | } | ||||
19836 | } | ||||
19837 | |||||
19838 | bool ARMTargetLowering::targetShrinkDemandedConstant( | ||||
19839 | SDValue Op, const APInt &DemandedBits, const APInt &DemandedElts, | ||||
19840 | TargetLoweringOpt &TLO) const { | ||||
19841 | // Delay optimization, so we don't have to deal with illegal types, or block | ||||
19842 | // optimizations. | ||||
19843 | if (!TLO.LegalOps) | ||||
19844 | return false; | ||||
19845 | |||||
19846 | // Only optimize AND for now. | ||||
19847 | if (Op.getOpcode() != ISD::AND) | ||||
19848 | return false; | ||||
19849 | |||||
19850 | EVT VT = Op.getValueType(); | ||||
19851 | |||||
19852 | // Ignore vectors. | ||||
19853 | if (VT.isVector()) | ||||
19854 | return false; | ||||
19855 | |||||
19856 | assert(VT == MVT::i32 && "Unexpected integer type")(static_cast <bool> (VT == MVT::i32 && "Unexpected integer type" ) ? void (0) : __assert_fail ("VT == MVT::i32 && \"Unexpected integer type\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 19856, __extension__ __PRETTY_FUNCTION__)); | ||||
19857 | |||||
19858 | // Make sure the RHS really is a constant. | ||||
19859 | ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op.getOperand(1)); | ||||
19860 | if (!C) | ||||
19861 | return false; | ||||
19862 | |||||
19863 | unsigned Mask = C->getZExtValue(); | ||||
19864 | |||||
19865 | unsigned Demanded = DemandedBits.getZExtValue(); | ||||
19866 | unsigned ShrunkMask = Mask & Demanded; | ||||
19867 | unsigned ExpandedMask = Mask | ~Demanded; | ||||
19868 | |||||
19869 | // If the mask is all zeros, let the target-independent code replace the | ||||
19870 | // result with zero. | ||||
19871 | if (ShrunkMask == 0) | ||||
19872 | return false; | ||||
19873 | |||||
19874 | // If the mask is all ones, erase the AND. (Currently, the target-independent | ||||
19875 | // code won't do this, so we have to do it explicitly to avoid an infinite | ||||
19876 | // loop in obscure cases.) | ||||
19877 | if (ExpandedMask == ~0U) | ||||
19878 | return TLO.CombineTo(Op, Op.getOperand(0)); | ||||
19879 | |||||
19880 | auto IsLegalMask = [ShrunkMask, ExpandedMask](unsigned Mask) -> bool { | ||||
19881 | return (ShrunkMask & Mask) == ShrunkMask && (~ExpandedMask & Mask) == 0; | ||||
19882 | }; | ||||
19883 | auto UseMask = [Mask, Op, VT, &TLO](unsigned NewMask) -> bool { | ||||
19884 | if (NewMask == Mask) | ||||
19885 | return true; | ||||
19886 | SDLoc DL(Op); | ||||
19887 | SDValue NewC = TLO.DAG.getConstant(NewMask, DL, VT); | ||||
19888 | SDValue NewOp = TLO.DAG.getNode(ISD::AND, DL, VT, Op.getOperand(0), NewC); | ||||
19889 | return TLO.CombineTo(Op, NewOp); | ||||
19890 | }; | ||||
19891 | |||||
19892 | // Prefer uxtb mask. | ||||
19893 | if (IsLegalMask(0xFF)) | ||||
19894 | return UseMask(0xFF); | ||||
19895 | |||||
19896 | // Prefer uxth mask. | ||||
19897 | if (IsLegalMask(0xFFFF)) | ||||
19898 | return UseMask(0xFFFF); | ||||
19899 | |||||
19900 | // [1, 255] is Thumb1 movs+ands, legal immediate for ARM/Thumb2. | ||||
19901 | // FIXME: Prefer a contiguous sequence of bits for other optimizations. | ||||
19902 | if (ShrunkMask < 256) | ||||
19903 | return UseMask(ShrunkMask); | ||||
19904 | |||||
19905 | // [-256, -2] is Thumb1 movs+bics, legal immediate for ARM/Thumb2. | ||||
19906 | // FIXME: Prefer a contiguous sequence of bits for other optimizations. | ||||
19907 | if ((int)ExpandedMask <= -2 && (int)ExpandedMask >= -256) | ||||
19908 | return UseMask(ExpandedMask); | ||||
19909 | |||||
19910 | // Potential improvements: | ||||
19911 | // | ||||
19912 | // We could try to recognize lsls+lsrs or lsrs+lsls pairs here. | ||||
19913 | // We could try to prefer Thumb1 immediates which can be lowered to a | ||||
19914 | // two-instruction sequence. | ||||
19915 | // We could try to recognize more legal ARM/Thumb2 immediates here. | ||||
19916 | |||||
19917 | return false; | ||||
19918 | } | ||||
19919 | |||||
19920 | bool ARMTargetLowering::SimplifyDemandedBitsForTargetNode( | ||||
19921 | SDValue Op, const APInt &OriginalDemandedBits, | ||||
19922 | const APInt &OriginalDemandedElts, KnownBits &Known, TargetLoweringOpt &TLO, | ||||
19923 | unsigned Depth) const { | ||||
19924 | unsigned Opc = Op.getOpcode(); | ||||
19925 | |||||
19926 | switch (Opc) { | ||||
19927 | case ARMISD::ASRL: | ||||
19928 | case ARMISD::LSRL: { | ||||
19929 | // If this is result 0 and the other result is unused, see if the demand | ||||
19930 | // bits allow us to shrink this long shift into a standard small shift in | ||||
19931 | // the opposite direction. | ||||
19932 | if (Op.getResNo() == 0 && !Op->hasAnyUseOfValue(1) && | ||||
19933 | isa<ConstantSDNode>(Op->getOperand(2))) { | ||||
19934 | unsigned ShAmt = Op->getConstantOperandVal(2); | ||||
19935 | if (ShAmt < 32 && OriginalDemandedBits.isSubsetOf(APInt::getAllOnes(32) | ||||
19936 | << (32 - ShAmt))) | ||||
19937 | return TLO.CombineTo( | ||||
19938 | Op, TLO.DAG.getNode( | ||||
19939 | ISD::SHL, SDLoc(Op), MVT::i32, Op.getOperand(1), | ||||
19940 | TLO.DAG.getConstant(32 - ShAmt, SDLoc(Op), MVT::i32))); | ||||
19941 | } | ||||
19942 | break; | ||||
19943 | } | ||||
19944 | } | ||||
19945 | |||||
19946 | return TargetLowering::SimplifyDemandedBitsForTargetNode( | ||||
19947 | Op, OriginalDemandedBits, OriginalDemandedElts, Known, TLO, Depth); | ||||
19948 | } | ||||
19949 | |||||
19950 | //===----------------------------------------------------------------------===// | ||||
19951 | // ARM Inline Assembly Support | ||||
19952 | //===----------------------------------------------------------------------===// | ||||
19953 | |||||
19954 | bool ARMTargetLowering::ExpandInlineAsm(CallInst *CI) const { | ||||
19955 | // Looking for "rev" which is V6+. | ||||
19956 | if (!Subtarget->hasV6Ops()) | ||||
19957 | return false; | ||||
19958 | |||||
19959 | InlineAsm *IA = cast<InlineAsm>(CI->getCalledOperand()); | ||||
19960 | std::string AsmStr = IA->getAsmString(); | ||||
19961 | SmallVector<StringRef, 4> AsmPieces; | ||||
19962 | SplitString(AsmStr, AsmPieces, ";\n"); | ||||
19963 | |||||
19964 | switch (AsmPieces.size()) { | ||||
19965 | default: return false; | ||||
19966 | case 1: | ||||
19967 | AsmStr = std::string(AsmPieces[0]); | ||||
19968 | AsmPieces.clear(); | ||||
19969 | SplitString(AsmStr, AsmPieces, " \t,"); | ||||
19970 | |||||
19971 | // rev $0, $1 | ||||
19972 | if (AsmPieces.size() == 3 && | ||||
19973 | AsmPieces[0] == "rev" && AsmPieces[1] == "$0" && AsmPieces[2] == "$1" && | ||||
19974 | IA->getConstraintString().compare(0, 4, "=l,l") == 0) { | ||||
19975 | IntegerType *Ty = dyn_cast<IntegerType>(CI->getType()); | ||||
19976 | if (Ty && Ty->getBitWidth() == 32) | ||||
19977 | return IntrinsicLowering::LowerToByteSwap(CI); | ||||
19978 | } | ||||
19979 | break; | ||||
19980 | } | ||||
19981 | |||||
19982 | return false; | ||||
19983 | } | ||||
19984 | |||||
19985 | const char *ARMTargetLowering::LowerXConstraint(EVT ConstraintVT) const { | ||||
19986 | // At this point, we have to lower this constraint to something else, so we | ||||
19987 | // lower it to an "r" or "w". However, by doing this we will force the result | ||||
19988 | // to be in register, while the X constraint is much more permissive. | ||||
19989 | // | ||||
19990 | // Although we are correct (we are free to emit anything, without | ||||
19991 | // constraints), we might break use cases that would expect us to be more | ||||
19992 | // efficient and emit something else. | ||||
19993 | if (!Subtarget->hasVFP2Base()) | ||||
19994 | return "r"; | ||||
19995 | if (ConstraintVT.isFloatingPoint()) | ||||
19996 | return "w"; | ||||
19997 | if (ConstraintVT.isVector() && Subtarget->hasNEON() && | ||||
19998 | (ConstraintVT.getSizeInBits() == 64 || | ||||
19999 | ConstraintVT.getSizeInBits() == 128)) | ||||
20000 | return "w"; | ||||
20001 | |||||
20002 | return "r"; | ||||
20003 | } | ||||
20004 | |||||
20005 | /// getConstraintType - Given a constraint letter, return the type of | ||||
20006 | /// constraint it is for this target. | ||||
20007 | ARMTargetLowering::ConstraintType | ||||
20008 | ARMTargetLowering::getConstraintType(StringRef Constraint) const { | ||||
20009 | unsigned S = Constraint.size(); | ||||
20010 | if (S == 1) { | ||||
20011 | switch (Constraint[0]) { | ||||
20012 | default: break; | ||||
20013 | case 'l': return C_RegisterClass; | ||||
20014 | case 'w': return C_RegisterClass; | ||||
20015 | case 'h': return C_RegisterClass; | ||||
20016 | case 'x': return C_RegisterClass; | ||||
20017 | case 't': return C_RegisterClass; | ||||
20018 | case 'j': return C_Immediate; // Constant for movw. | ||||
20019 | // An address with a single base register. Due to the way we | ||||
20020 | // currently handle addresses it is the same as an 'r' memory constraint. | ||||
20021 | case 'Q': return C_Memory; | ||||
20022 | } | ||||
20023 | } else if (S == 2) { | ||||
20024 | switch (Constraint[0]) { | ||||
20025 | default: break; | ||||
20026 | case 'T': return C_RegisterClass; | ||||
20027 | // All 'U+' constraints are addresses. | ||||
20028 | case 'U': return C_Memory; | ||||
20029 | } | ||||
20030 | } | ||||
20031 | return TargetLowering::getConstraintType(Constraint); | ||||
20032 | } | ||||
20033 | |||||
20034 | /// Examine constraint type and operand type and determine a weight value. | ||||
20035 | /// This object must already have been set up with the operand type | ||||
20036 | /// and the current alternative constraint selected. | ||||
20037 | TargetLowering::ConstraintWeight | ||||
20038 | ARMTargetLowering::getSingleConstraintMatchWeight( | ||||
20039 | AsmOperandInfo &info, const char *constraint) const { | ||||
20040 | ConstraintWeight weight = CW_Invalid; | ||||
20041 | Value *CallOperandVal = info.CallOperandVal; | ||||
20042 | // If we don't have a value, we can't do a match, | ||||
20043 | // but allow it at the lowest weight. | ||||
20044 | if (!CallOperandVal) | ||||
20045 | return CW_Default; | ||||
20046 | Type *type = CallOperandVal->getType(); | ||||
20047 | // Look at the constraint type. | ||||
20048 | switch (*constraint) { | ||||
20049 | default: | ||||
20050 | weight = TargetLowering::getSingleConstraintMatchWeight(info, constraint); | ||||
20051 | break; | ||||
20052 | case 'l': | ||||
20053 | if (type->isIntegerTy()) { | ||||
20054 | if (Subtarget->isThumb()) | ||||
20055 | weight = CW_SpecificReg; | ||||
20056 | else | ||||
20057 | weight = CW_Register; | ||||
20058 | } | ||||
20059 | break; | ||||
20060 | case 'w': | ||||
20061 | if (type->isFloatingPointTy()) | ||||
20062 | weight = CW_Register; | ||||
20063 | break; | ||||
20064 | } | ||||
20065 | return weight; | ||||
20066 | } | ||||
20067 | |||||
20068 | using RCPair = std::pair<unsigned, const TargetRegisterClass *>; | ||||
20069 | |||||
20070 | RCPair ARMTargetLowering::getRegForInlineAsmConstraint( | ||||
20071 | const TargetRegisterInfo *TRI, StringRef Constraint, MVT VT) const { | ||||
20072 | switch (Constraint.size()) { | ||||
20073 | case 1: | ||||
20074 | // GCC ARM Constraint Letters | ||||
20075 | switch (Constraint[0]) { | ||||
20076 | case 'l': // Low regs or general regs. | ||||
20077 | if (Subtarget->isThumb()) | ||||
20078 | return RCPair(0U, &ARM::tGPRRegClass); | ||||
20079 | return RCPair(0U, &ARM::GPRRegClass); | ||||
20080 | case 'h': // High regs or no regs. | ||||
20081 | if (Subtarget->isThumb()) | ||||
20082 | return RCPair(0U, &ARM::hGPRRegClass); | ||||
20083 | break; | ||||
20084 | case 'r': | ||||
20085 | if (Subtarget->isThumb1Only()) | ||||
20086 | return RCPair(0U, &ARM::tGPRRegClass); | ||||
20087 | return RCPair(0U, &ARM::GPRRegClass); | ||||
20088 | case 'w': | ||||
20089 | if (VT == MVT::Other) | ||||
20090 | break; | ||||
20091 | if (VT == MVT::f32) | ||||
20092 | return RCPair(0U, &ARM::SPRRegClass); | ||||
20093 | if (VT.getSizeInBits() == 64) | ||||
20094 | return RCPair(0U, &ARM::DPRRegClass); | ||||
20095 | if (VT.getSizeInBits() == 128) | ||||
20096 | return RCPair(0U, &ARM::QPRRegClass); | ||||
20097 | break; | ||||
20098 | case 'x': | ||||
20099 | if (VT == MVT::Other) | ||||
20100 | break; | ||||
20101 | if (VT == MVT::f32) | ||||
20102 | return RCPair(0U, &ARM::SPR_8RegClass); | ||||
20103 | if (VT.getSizeInBits() == 64) | ||||
20104 | return RCPair(0U, &ARM::DPR_8RegClass); | ||||
20105 | if (VT.getSizeInBits() == 128) | ||||
20106 | return RCPair(0U, &ARM::QPR_8RegClass); | ||||
20107 | break; | ||||
20108 | case 't': | ||||
20109 | if (VT == MVT::Other) | ||||
20110 | break; | ||||
20111 | if (VT == MVT::f32 || VT == MVT::i32) | ||||
20112 | return RCPair(0U, &ARM::SPRRegClass); | ||||
20113 | if (VT.getSizeInBits() == 64) | ||||
20114 | return RCPair(0U, &ARM::DPR_VFP2RegClass); | ||||
20115 | if (VT.getSizeInBits() == 128) | ||||
20116 | return RCPair(0U, &ARM::QPR_VFP2RegClass); | ||||
20117 | break; | ||||
20118 | } | ||||
20119 | break; | ||||
20120 | |||||
20121 | case 2: | ||||
20122 | if (Constraint[0] == 'T') { | ||||
20123 | switch (Constraint[1]) { | ||||
20124 | default: | ||||
20125 | break; | ||||
20126 | case 'e': | ||||
20127 | return RCPair(0U, &ARM::tGPREvenRegClass); | ||||
20128 | case 'o': | ||||
20129 | return RCPair(0U, &ARM::tGPROddRegClass); | ||||
20130 | } | ||||
20131 | } | ||||
20132 | break; | ||||
20133 | |||||
20134 | default: | ||||
20135 | break; | ||||
20136 | } | ||||
20137 | |||||
20138 | if (StringRef("{cc}").equals_insensitive(Constraint)) | ||||
20139 | return std::make_pair(unsigned(ARM::CPSR), &ARM::CCRRegClass); | ||||
20140 | |||||
20141 | return TargetLowering::getRegForInlineAsmConstraint(TRI, Constraint, VT); | ||||
20142 | } | ||||
20143 | |||||
20144 | /// LowerAsmOperandForConstraint - Lower the specified operand into the Ops | ||||
20145 | /// vector. If it is invalid, don't add anything to Ops. | ||||
20146 | void ARMTargetLowering::LowerAsmOperandForConstraint(SDValue Op, | ||||
20147 | std::string &Constraint, | ||||
20148 | std::vector<SDValue>&Ops, | ||||
20149 | SelectionDAG &DAG) const { | ||||
20150 | SDValue Result; | ||||
20151 | |||||
20152 | // Currently only support length 1 constraints. | ||||
20153 | if (Constraint.length() != 1) return; | ||||
20154 | |||||
20155 | char ConstraintLetter = Constraint[0]; | ||||
20156 | switch (ConstraintLetter) { | ||||
20157 | default: break; | ||||
20158 | case 'j': | ||||
20159 | case 'I': case 'J': case 'K': case 'L': | ||||
20160 | case 'M': case 'N': case 'O': | ||||
20161 | ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op); | ||||
20162 | if (!C) | ||||
20163 | return; | ||||
20164 | |||||
20165 | int64_t CVal64 = C->getSExtValue(); | ||||
20166 | int CVal = (int) CVal64; | ||||
20167 | // None of these constraints allow values larger than 32 bits. Check | ||||
20168 | // that the value fits in an int. | ||||
20169 | if (CVal != CVal64) | ||||
20170 | return; | ||||
20171 | |||||
20172 | switch (ConstraintLetter) { | ||||
20173 | case 'j': | ||||
20174 | // Constant suitable for movw, must be between 0 and | ||||
20175 | // 65535. | ||||
20176 | if (Subtarget->hasV6T2Ops() || (Subtarget->hasV8MBaselineOps())) | ||||
20177 | if (CVal >= 0 && CVal <= 65535) | ||||
20178 | break; | ||||
20179 | return; | ||||
20180 | case 'I': | ||||
20181 | if (Subtarget->isThumb1Only()) { | ||||
20182 | // This must be a constant between 0 and 255, for ADD | ||||
20183 | // immediates. | ||||
20184 | if (CVal >= 0 && CVal <= 255) | ||||
20185 | break; | ||||
20186 | } else if (Subtarget->isThumb2()) { | ||||
20187 | // A constant that can be used as an immediate value in a | ||||
20188 | // data-processing instruction. | ||||
20189 | if (ARM_AM::getT2SOImmVal(CVal) != -1) | ||||
20190 | break; | ||||
20191 | } else { | ||||
20192 | // A constant that can be used as an immediate value in a | ||||
20193 | // data-processing instruction. | ||||
20194 | if (ARM_AM::getSOImmVal(CVal) != -1) | ||||
20195 | break; | ||||
20196 | } | ||||
20197 | return; | ||||
20198 | |||||
20199 | case 'J': | ||||
20200 | if (Subtarget->isThumb1Only()) { | ||||
20201 | // This must be a constant between -255 and -1, for negated ADD | ||||
20202 | // immediates. This can be used in GCC with an "n" modifier that | ||||
20203 | // prints the negated value, for use with SUB instructions. It is | ||||
20204 | // not useful otherwise but is implemented for compatibility. | ||||
20205 | if (CVal >= -255 && CVal <= -1) | ||||
20206 | break; | ||||
20207 | } else { | ||||
20208 | // This must be a constant between -4095 and 4095. It is not clear | ||||
20209 | // what this constraint is intended for. Implemented for | ||||
20210 | // compatibility with GCC. | ||||
20211 | if (CVal >= -4095 && CVal <= 4095) | ||||
20212 | break; | ||||
20213 | } | ||||
20214 | return; | ||||
20215 | |||||
20216 | case 'K': | ||||
20217 | if (Subtarget->isThumb1Only()) { | ||||
20218 | // A 32-bit value where only one byte has a nonzero value. Exclude | ||||
20219 | // zero to match GCC. This constraint is used by GCC internally for | ||||
20220 | // constants that can be loaded with a move/shift combination. | ||||
20221 | // It is not useful otherwise but is implemented for compatibility. | ||||
20222 | if (CVal != 0 && ARM_AM::isThumbImmShiftedVal(CVal)) | ||||
20223 | break; | ||||
20224 | } else if (Subtarget->isThumb2()) { | ||||
20225 | // A constant whose bitwise inverse can be used as an immediate | ||||
20226 | // value in a data-processing instruction. This can be used in GCC | ||||
20227 | // with a "B" modifier that prints the inverted value, for use with | ||||
20228 | // BIC and MVN instructions. It is not useful otherwise but is | ||||
20229 | // implemented for compatibility. | ||||
20230 | if (ARM_AM::getT2SOImmVal(~CVal) != -1) | ||||
20231 | break; | ||||
20232 | } else { | ||||
20233 | // A constant whose bitwise inverse can be used as an immediate | ||||
20234 | // value in a data-processing instruction. This can be used in GCC | ||||
20235 | // with a "B" modifier that prints the inverted value, for use with | ||||
20236 | // BIC and MVN instructions. It is not useful otherwise but is | ||||
20237 | // implemented for compatibility. | ||||
20238 | if (ARM_AM::getSOImmVal(~CVal) != -1) | ||||
20239 | break; | ||||
20240 | } | ||||
20241 | return; | ||||
20242 | |||||
20243 | case 'L': | ||||
20244 | if (Subtarget->isThumb1Only()) { | ||||
20245 | // This must be a constant between -7 and 7, | ||||
20246 | // for 3-operand ADD/SUB immediate instructions. | ||||
20247 | if (CVal >= -7 && CVal < 7) | ||||
20248 | break; | ||||
20249 | } else if (Subtarget->isThumb2()) { | ||||
20250 | // A constant whose negation can be used as an immediate value in a | ||||
20251 | // data-processing instruction. This can be used in GCC with an "n" | ||||
20252 | // modifier that prints the negated value, for use with SUB | ||||
20253 | // instructions. It is not useful otherwise but is implemented for | ||||
20254 | // compatibility. | ||||
20255 | if (ARM_AM::getT2SOImmVal(-CVal) != -1) | ||||
20256 | break; | ||||
20257 | } else { | ||||
20258 | // A constant whose negation can be used as an immediate value in a | ||||
20259 | // data-processing instruction. This can be used in GCC with an "n" | ||||
20260 | // modifier that prints the negated value, for use with SUB | ||||
20261 | // instructions. It is not useful otherwise but is implemented for | ||||
20262 | // compatibility. | ||||
20263 | if (ARM_AM::getSOImmVal(-CVal) != -1) | ||||
20264 | break; | ||||
20265 | } | ||||
20266 | return; | ||||
20267 | |||||
20268 | case 'M': | ||||
20269 | if (Subtarget->isThumb1Only()) { | ||||
20270 | // This must be a multiple of 4 between 0 and 1020, for | ||||
20271 | // ADD sp + immediate. | ||||
20272 | if ((CVal >= 0 && CVal <= 1020) && ((CVal & 3) == 0)) | ||||
20273 | break; | ||||
20274 | } else { | ||||
20275 | // A power of two or a constant between 0 and 32. This is used in | ||||
20276 | // GCC for the shift amount on shifted register operands, but it is | ||||
20277 | // useful in general for any shift amounts. | ||||
20278 | if ((CVal >= 0 && CVal <= 32) || ((CVal & (CVal - 1)) == 0)) | ||||
20279 | break; | ||||
20280 | } | ||||
20281 | return; | ||||
20282 | |||||
20283 | case 'N': | ||||
20284 | if (Subtarget->isThumb1Only()) { | ||||
20285 | // This must be a constant between 0 and 31, for shift amounts. | ||||
20286 | if (CVal >= 0 && CVal <= 31) | ||||
20287 | break; | ||||
20288 | } | ||||
20289 | return; | ||||
20290 | |||||
20291 | case 'O': | ||||
20292 | if (Subtarget->isThumb1Only()) { | ||||
20293 | // This must be a multiple of 4 between -508 and 508, for | ||||
20294 | // ADD/SUB sp = sp + immediate. | ||||
20295 | if ((CVal >= -508 && CVal <= 508) && ((CVal & 3) == 0)) | ||||
20296 | break; | ||||
20297 | } | ||||
20298 | return; | ||||
20299 | } | ||||
20300 | Result = DAG.getTargetConstant(CVal, SDLoc(Op), Op.getValueType()); | ||||
20301 | break; | ||||
20302 | } | ||||
20303 | |||||
20304 | if (Result.getNode()) { | ||||
20305 | Ops.push_back(Result); | ||||
20306 | return; | ||||
20307 | } | ||||
20308 | return TargetLowering::LowerAsmOperandForConstraint(Op, Constraint, Ops, DAG); | ||||
20309 | } | ||||
20310 | |||||
20311 | static RTLIB::Libcall getDivRemLibcall( | ||||
20312 | const SDNode *N, MVT::SimpleValueType SVT) { | ||||
20313 | assert((N->getOpcode() == ISD::SDIVREM || N->getOpcode() == ISD::UDIVREM ||(static_cast <bool> ((N->getOpcode() == ISD::SDIVREM || N->getOpcode() == ISD::UDIVREM || N->getOpcode() == ISD::SREM || N->getOpcode() == ISD::UREM) && "Unhandled Opcode in getDivRemLibcall" ) ? void (0) : __assert_fail ("(N->getOpcode() == ISD::SDIVREM || N->getOpcode() == ISD::UDIVREM || N->getOpcode() == ISD::SREM || N->getOpcode() == ISD::UREM) && \"Unhandled Opcode in getDivRemLibcall\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 20315, __extension__ __PRETTY_FUNCTION__)) | ||||
20314 | N->getOpcode() == ISD::SREM || N->getOpcode() == ISD::UREM) &&(static_cast <bool> ((N->getOpcode() == ISD::SDIVREM || N->getOpcode() == ISD::UDIVREM || N->getOpcode() == ISD::SREM || N->getOpcode() == ISD::UREM) && "Unhandled Opcode in getDivRemLibcall" ) ? void (0) : __assert_fail ("(N->getOpcode() == ISD::SDIVREM || N->getOpcode() == ISD::UDIVREM || N->getOpcode() == ISD::SREM || N->getOpcode() == ISD::UREM) && \"Unhandled Opcode in getDivRemLibcall\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 20315, __extension__ __PRETTY_FUNCTION__)) | ||||
20315 | "Unhandled Opcode in getDivRemLibcall")(static_cast <bool> ((N->getOpcode() == ISD::SDIVREM || N->getOpcode() == ISD::UDIVREM || N->getOpcode() == ISD::SREM || N->getOpcode() == ISD::UREM) && "Unhandled Opcode in getDivRemLibcall" ) ? void (0) : __assert_fail ("(N->getOpcode() == ISD::SDIVREM || N->getOpcode() == ISD::UDIVREM || N->getOpcode() == ISD::SREM || N->getOpcode() == ISD::UREM) && \"Unhandled Opcode in getDivRemLibcall\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 20315, __extension__ __PRETTY_FUNCTION__)); | ||||
20316 | bool isSigned = N->getOpcode() == ISD::SDIVREM || | ||||
20317 | N->getOpcode() == ISD::SREM; | ||||
20318 | RTLIB::Libcall LC; | ||||
20319 | switch (SVT) { | ||||
20320 | default: llvm_unreachable("Unexpected request for libcall!")::llvm::llvm_unreachable_internal("Unexpected request for libcall!" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 20320); | ||||
20321 | case MVT::i8: LC = isSigned ? RTLIB::SDIVREM_I8 : RTLIB::UDIVREM_I8; break; | ||||
20322 | case MVT::i16: LC = isSigned ? RTLIB::SDIVREM_I16 : RTLIB::UDIVREM_I16; break; | ||||
20323 | case MVT::i32: LC = isSigned ? RTLIB::SDIVREM_I32 : RTLIB::UDIVREM_I32; break; | ||||
20324 | case MVT::i64: LC = isSigned ? RTLIB::SDIVREM_I64 : RTLIB::UDIVREM_I64; break; | ||||
20325 | } | ||||
20326 | return LC; | ||||
20327 | } | ||||
20328 | |||||
20329 | static TargetLowering::ArgListTy getDivRemArgList( | ||||
20330 | const SDNode *N, LLVMContext *Context, const ARMSubtarget *Subtarget) { | ||||
20331 | assert((N->getOpcode() == ISD::SDIVREM || N->getOpcode() == ISD::UDIVREM ||(static_cast <bool> ((N->getOpcode() == ISD::SDIVREM || N->getOpcode() == ISD::UDIVREM || N->getOpcode() == ISD::SREM || N->getOpcode() == ISD::UREM) && "Unhandled Opcode in getDivRemArgList" ) ? void (0) : __assert_fail ("(N->getOpcode() == ISD::SDIVREM || N->getOpcode() == ISD::UDIVREM || N->getOpcode() == ISD::SREM || N->getOpcode() == ISD::UREM) && \"Unhandled Opcode in getDivRemArgList\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 20333, __extension__ __PRETTY_FUNCTION__)) | ||||
20332 | N->getOpcode() == ISD::SREM || N->getOpcode() == ISD::UREM) &&(static_cast <bool> ((N->getOpcode() == ISD::SDIVREM || N->getOpcode() == ISD::UDIVREM || N->getOpcode() == ISD::SREM || N->getOpcode() == ISD::UREM) && "Unhandled Opcode in getDivRemArgList" ) ? void (0) : __assert_fail ("(N->getOpcode() == ISD::SDIVREM || N->getOpcode() == ISD::UDIVREM || N->getOpcode() == ISD::SREM || N->getOpcode() == ISD::UREM) && \"Unhandled Opcode in getDivRemArgList\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 20333, __extension__ __PRETTY_FUNCTION__)) | ||||
20333 | "Unhandled Opcode in getDivRemArgList")(static_cast <bool> ((N->getOpcode() == ISD::SDIVREM || N->getOpcode() == ISD::UDIVREM || N->getOpcode() == ISD::SREM || N->getOpcode() == ISD::UREM) && "Unhandled Opcode in getDivRemArgList" ) ? void (0) : __assert_fail ("(N->getOpcode() == ISD::SDIVREM || N->getOpcode() == ISD::UDIVREM || N->getOpcode() == ISD::SREM || N->getOpcode() == ISD::UREM) && \"Unhandled Opcode in getDivRemArgList\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 20333, __extension__ __PRETTY_FUNCTION__)); | ||||
20334 | bool isSigned = N->getOpcode() == ISD::SDIVREM || | ||||
20335 | N->getOpcode() == ISD::SREM; | ||||
20336 | TargetLowering::ArgListTy Args; | ||||
20337 | TargetLowering::ArgListEntry Entry; | ||||
20338 | for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) { | ||||
20339 | EVT ArgVT = N->getOperand(i).getValueType(); | ||||
20340 | Type *ArgTy = ArgVT.getTypeForEVT(*Context); | ||||
20341 | Entry.Node = N->getOperand(i); | ||||
20342 | Entry.Ty = ArgTy; | ||||
20343 | Entry.IsSExt = isSigned; | ||||
20344 | Entry.IsZExt = !isSigned; | ||||
20345 | Args.push_back(Entry); | ||||
20346 | } | ||||
20347 | if (Subtarget->isTargetWindows() && Args.size() >= 2) | ||||
20348 | std::swap(Args[0], Args[1]); | ||||
20349 | return Args; | ||||
20350 | } | ||||
20351 | |||||
20352 | SDValue ARMTargetLowering::LowerDivRem(SDValue Op, SelectionDAG &DAG) const { | ||||
20353 | assert((Subtarget->isTargetAEABI() || Subtarget->isTargetAndroid() ||(static_cast <bool> ((Subtarget->isTargetAEABI() || Subtarget ->isTargetAndroid() || Subtarget->isTargetGNUAEABI() || Subtarget->isTargetMuslAEABI() || Subtarget->isTargetWindows ()) && "Register-based DivRem lowering only") ? void ( 0) : __assert_fail ("(Subtarget->isTargetAEABI() || Subtarget->isTargetAndroid() || Subtarget->isTargetGNUAEABI() || Subtarget->isTargetMuslAEABI() || Subtarget->isTargetWindows()) && \"Register-based DivRem lowering only\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 20356, __extension__ __PRETTY_FUNCTION__)) | ||||
20354 | Subtarget->isTargetGNUAEABI() || Subtarget->isTargetMuslAEABI() ||(static_cast <bool> ((Subtarget->isTargetAEABI() || Subtarget ->isTargetAndroid() || Subtarget->isTargetGNUAEABI() || Subtarget->isTargetMuslAEABI() || Subtarget->isTargetWindows ()) && "Register-based DivRem lowering only") ? void ( 0) : __assert_fail ("(Subtarget->isTargetAEABI() || Subtarget->isTargetAndroid() || Subtarget->isTargetGNUAEABI() || Subtarget->isTargetMuslAEABI() || Subtarget->isTargetWindows()) && \"Register-based DivRem lowering only\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 20356, __extension__ __PRETTY_FUNCTION__)) | ||||
20355 | Subtarget->isTargetWindows()) &&(static_cast <bool> ((Subtarget->isTargetAEABI() || Subtarget ->isTargetAndroid() || Subtarget->isTargetGNUAEABI() || Subtarget->isTargetMuslAEABI() || Subtarget->isTargetWindows ()) && "Register-based DivRem lowering only") ? void ( 0) : __assert_fail ("(Subtarget->isTargetAEABI() || Subtarget->isTargetAndroid() || Subtarget->isTargetGNUAEABI() || Subtarget->isTargetMuslAEABI() || Subtarget->isTargetWindows()) && \"Register-based DivRem lowering only\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 20356, __extension__ __PRETTY_FUNCTION__)) | ||||
20356 | "Register-based DivRem lowering only")(static_cast <bool> ((Subtarget->isTargetAEABI() || Subtarget ->isTargetAndroid() || Subtarget->isTargetGNUAEABI() || Subtarget->isTargetMuslAEABI() || Subtarget->isTargetWindows ()) && "Register-based DivRem lowering only") ? void ( 0) : __assert_fail ("(Subtarget->isTargetAEABI() || Subtarget->isTargetAndroid() || Subtarget->isTargetGNUAEABI() || Subtarget->isTargetMuslAEABI() || Subtarget->isTargetWindows()) && \"Register-based DivRem lowering only\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 20356, __extension__ __PRETTY_FUNCTION__)); | ||||
20357 | unsigned Opcode = Op->getOpcode(); | ||||
20358 | assert((Opcode == ISD::SDIVREM || Opcode == ISD::UDIVREM) &&(static_cast <bool> ((Opcode == ISD::SDIVREM || Opcode == ISD::UDIVREM) && "Invalid opcode for Div/Rem lowering" ) ? void (0) : __assert_fail ("(Opcode == ISD::SDIVREM || Opcode == ISD::UDIVREM) && \"Invalid opcode for Div/Rem lowering\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 20359, __extension__ __PRETTY_FUNCTION__)) | ||||
20359 | "Invalid opcode for Div/Rem lowering")(static_cast <bool> ((Opcode == ISD::SDIVREM || Opcode == ISD::UDIVREM) && "Invalid opcode for Div/Rem lowering" ) ? void (0) : __assert_fail ("(Opcode == ISD::SDIVREM || Opcode == ISD::UDIVREM) && \"Invalid opcode for Div/Rem lowering\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 20359, __extension__ __PRETTY_FUNCTION__)); | ||||
20360 | bool isSigned = (Opcode == ISD::SDIVREM); | ||||
20361 | EVT VT = Op->getValueType(0); | ||||
20362 | Type *Ty = VT.getTypeForEVT(*DAG.getContext()); | ||||
20363 | SDLoc dl(Op); | ||||
20364 | |||||
20365 | // If the target has hardware divide, use divide + multiply + subtract: | ||||
20366 | // div = a / b | ||||
20367 | // rem = a - b * div | ||||
20368 | // return {div, rem} | ||||
20369 | // This should be lowered into UDIV/SDIV + MLS later on. | ||||
20370 | bool hasDivide = Subtarget->isThumb() ? Subtarget->hasDivideInThumbMode() | ||||
20371 | : Subtarget->hasDivideInARMMode(); | ||||
20372 | if (hasDivide && Op->getValueType(0).isSimple() && | ||||
20373 | Op->getSimpleValueType(0) == MVT::i32) { | ||||
20374 | unsigned DivOpcode = isSigned ? ISD::SDIV : ISD::UDIV; | ||||
20375 | const SDValue Dividend = Op->getOperand(0); | ||||
20376 | const SDValue Divisor = Op->getOperand(1); | ||||
20377 | SDValue Div = DAG.getNode(DivOpcode, dl, VT, Dividend, Divisor); | ||||
20378 | SDValue Mul = DAG.getNode(ISD::MUL, dl, VT, Div, Divisor); | ||||
20379 | SDValue Rem = DAG.getNode(ISD::SUB, dl, VT, Dividend, Mul); | ||||
20380 | |||||
20381 | SDValue Values[2] = {Div, Rem}; | ||||
20382 | return DAG.getNode(ISD::MERGE_VALUES, dl, DAG.getVTList(VT, VT), Values); | ||||
20383 | } | ||||
20384 | |||||
20385 | RTLIB::Libcall LC = getDivRemLibcall(Op.getNode(), | ||||
20386 | VT.getSimpleVT().SimpleTy); | ||||
20387 | SDValue InChain = DAG.getEntryNode(); | ||||
20388 | |||||
20389 | TargetLowering::ArgListTy Args = getDivRemArgList(Op.getNode(), | ||||
20390 | DAG.getContext(), | ||||
20391 | Subtarget); | ||||
20392 | |||||
20393 | SDValue Callee = DAG.getExternalSymbol(getLibcallName(LC), | ||||
20394 | getPointerTy(DAG.getDataLayout())); | ||||
20395 | |||||
20396 | Type *RetTy = StructType::get(Ty, Ty); | ||||
20397 | |||||
20398 | if (Subtarget->isTargetWindows()) | ||||
20399 | InChain = WinDBZCheckDenominator(DAG, Op.getNode(), InChain); | ||||
20400 | |||||
20401 | TargetLowering::CallLoweringInfo CLI(DAG); | ||||
20402 | CLI.setDebugLoc(dl).setChain(InChain) | ||||
20403 | .setCallee(getLibcallCallingConv(LC), RetTy, Callee, std::move(Args)) | ||||
20404 | .setInRegister().setSExtResult(isSigned).setZExtResult(!isSigned); | ||||
20405 | |||||
20406 | std::pair<SDValue, SDValue> CallInfo = LowerCallTo(CLI); | ||||
20407 | return CallInfo.first; | ||||
20408 | } | ||||
20409 | |||||
20410 | // Lowers REM using divmod helpers | ||||
20411 | // see RTABI section 4.2/4.3 | ||||
20412 | SDValue ARMTargetLowering::LowerREM(SDNode *N, SelectionDAG &DAG) const { | ||||
20413 | // Build return types (div and rem) | ||||
20414 | std::vector<Type*> RetTyParams; | ||||
20415 | Type *RetTyElement; | ||||
20416 | |||||
20417 | switch (N->getValueType(0).getSimpleVT().SimpleTy) { | ||||
20418 | default: llvm_unreachable("Unexpected request for libcall!")::llvm::llvm_unreachable_internal("Unexpected request for libcall!" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 20418); | ||||
20419 | case MVT::i8: RetTyElement = Type::getInt8Ty(*DAG.getContext()); break; | ||||
20420 | case MVT::i16: RetTyElement = Type::getInt16Ty(*DAG.getContext()); break; | ||||
20421 | case MVT::i32: RetTyElement = Type::getInt32Ty(*DAG.getContext()); break; | ||||
20422 | case MVT::i64: RetTyElement = Type::getInt64Ty(*DAG.getContext()); break; | ||||
20423 | } | ||||
20424 | |||||
20425 | RetTyParams.push_back(RetTyElement); | ||||
20426 | RetTyParams.push_back(RetTyElement); | ||||
20427 | ArrayRef<Type*> ret = ArrayRef<Type*>(RetTyParams); | ||||
20428 | Type *RetTy = StructType::get(*DAG.getContext(), ret); | ||||
20429 | |||||
20430 | RTLIB::Libcall LC = getDivRemLibcall(N, N->getValueType(0).getSimpleVT(). | ||||
20431 | SimpleTy); | ||||
20432 | SDValue InChain = DAG.getEntryNode(); | ||||
20433 | TargetLowering::ArgListTy Args = getDivRemArgList(N, DAG.getContext(), | ||||
20434 | Subtarget); | ||||
20435 | bool isSigned = N->getOpcode() == ISD::SREM; | ||||
20436 | SDValue Callee = DAG.getExternalSymbol(getLibcallName(LC), | ||||
20437 | getPointerTy(DAG.getDataLayout())); | ||||
20438 | |||||
20439 | if (Subtarget->isTargetWindows()) | ||||
20440 | InChain = WinDBZCheckDenominator(DAG, N, InChain); | ||||
20441 | |||||
20442 | // Lower call | ||||
20443 | CallLoweringInfo CLI(DAG); | ||||
20444 | CLI.setChain(InChain) | ||||
20445 | .setCallee(CallingConv::ARM_AAPCS, RetTy, Callee, std::move(Args)) | ||||
20446 | .setSExtResult(isSigned).setZExtResult(!isSigned).setDebugLoc(SDLoc(N)); | ||||
20447 | std::pair<SDValue, SDValue> CallResult = LowerCallTo(CLI); | ||||
20448 | |||||
20449 | // Return second (rem) result operand (first contains div) | ||||
20450 | SDNode *ResNode = CallResult.first.getNode(); | ||||
20451 | assert(ResNode->getNumOperands() == 2 && "divmod should return two operands")(static_cast <bool> (ResNode->getNumOperands() == 2 && "divmod should return two operands") ? void (0) : __assert_fail ("ResNode->getNumOperands() == 2 && \"divmod should return two operands\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 20451, __extension__ __PRETTY_FUNCTION__)); | ||||
20452 | return ResNode->getOperand(1); | ||||
20453 | } | ||||
20454 | |||||
20455 | SDValue | ||||
20456 | ARMTargetLowering::LowerDYNAMIC_STACKALLOC(SDValue Op, SelectionDAG &DAG) const { | ||||
20457 | assert(Subtarget->isTargetWindows() && "unsupported target platform")(static_cast <bool> (Subtarget->isTargetWindows() && "unsupported target platform") ? void (0) : __assert_fail ("Subtarget->isTargetWindows() && \"unsupported target platform\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 20457, __extension__ __PRETTY_FUNCTION__)); | ||||
20458 | SDLoc DL(Op); | ||||
20459 | |||||
20460 | // Get the inputs. | ||||
20461 | SDValue Chain = Op.getOperand(0); | ||||
20462 | SDValue Size = Op.getOperand(1); | ||||
20463 | |||||
20464 | if (DAG.getMachineFunction().getFunction().hasFnAttribute( | ||||
20465 | "no-stack-arg-probe")) { | ||||
20466 | MaybeAlign Align = | ||||
20467 | cast<ConstantSDNode>(Op.getOperand(2))->getMaybeAlignValue(); | ||||
20468 | SDValue SP = DAG.getCopyFromReg(Chain, DL, ARM::SP, MVT::i32); | ||||
20469 | Chain = SP.getValue(1); | ||||
20470 | SP = DAG.getNode(ISD::SUB, DL, MVT::i32, SP, Size); | ||||
20471 | if (Align) | ||||
20472 | SP = | ||||
20473 | DAG.getNode(ISD::AND, DL, MVT::i32, SP.getValue(0), | ||||
20474 | DAG.getConstant(-(uint64_t)Align->value(), DL, MVT::i32)); | ||||
20475 | Chain = DAG.getCopyToReg(Chain, DL, ARM::SP, SP); | ||||
20476 | SDValue Ops[2] = { SP, Chain }; | ||||
20477 | return DAG.getMergeValues(Ops, DL); | ||||
20478 | } | ||||
20479 | |||||
20480 | SDValue Words = DAG.getNode(ISD::SRL, DL, MVT::i32, Size, | ||||
20481 | DAG.getConstant(2, DL, MVT::i32)); | ||||
20482 | |||||
20483 | SDValue Flag; | ||||
20484 | Chain = DAG.getCopyToReg(Chain, DL, ARM::R4, Words, Flag); | ||||
20485 | Flag = Chain.getValue(1); | ||||
20486 | |||||
20487 | SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue); | ||||
20488 | Chain = DAG.getNode(ARMISD::WIN__CHKSTK, DL, NodeTys, Chain, Flag); | ||||
20489 | |||||
20490 | SDValue NewSP = DAG.getCopyFromReg(Chain, DL, ARM::SP, MVT::i32); | ||||
20491 | Chain = NewSP.getValue(1); | ||||
20492 | |||||
20493 | SDValue Ops[2] = { NewSP, Chain }; | ||||
20494 | return DAG.getMergeValues(Ops, DL); | ||||
20495 | } | ||||
20496 | |||||
20497 | SDValue ARMTargetLowering::LowerFP_EXTEND(SDValue Op, SelectionDAG &DAG) const { | ||||
20498 | bool IsStrict = Op->isStrictFPOpcode(); | ||||
20499 | SDValue SrcVal = Op.getOperand(IsStrict ? 1 : 0); | ||||
20500 | const unsigned DstSz = Op.getValueType().getSizeInBits(); | ||||
20501 | const unsigned SrcSz = SrcVal.getValueType().getSizeInBits(); | ||||
20502 | assert(DstSz > SrcSz && DstSz <= 64 && SrcSz >= 16 &&(static_cast <bool> (DstSz > SrcSz && DstSz <= 64 && SrcSz >= 16 && "Unexpected type for custom-lowering FP_EXTEND" ) ? void (0) : __assert_fail ("DstSz > SrcSz && DstSz <= 64 && SrcSz >= 16 && \"Unexpected type for custom-lowering FP_EXTEND\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 20503, __extension__ __PRETTY_FUNCTION__)) | ||||
20503 | "Unexpected type for custom-lowering FP_EXTEND")(static_cast <bool> (DstSz > SrcSz && DstSz <= 64 && SrcSz >= 16 && "Unexpected type for custom-lowering FP_EXTEND" ) ? void (0) : __assert_fail ("DstSz > SrcSz && DstSz <= 64 && SrcSz >= 16 && \"Unexpected type for custom-lowering FP_EXTEND\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 20503, __extension__ __PRETTY_FUNCTION__)); | ||||
20504 | |||||
20505 | assert((!Subtarget->hasFP64() || !Subtarget->hasFPARMv8Base()) &&(static_cast <bool> ((!Subtarget->hasFP64() || !Subtarget ->hasFPARMv8Base()) && "With both FP DP and 16, any FP conversion is legal!" ) ? void (0) : __assert_fail ("(!Subtarget->hasFP64() || !Subtarget->hasFPARMv8Base()) && \"With both FP DP and 16, any FP conversion is legal!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 20506, __extension__ __PRETTY_FUNCTION__)) | ||||
20506 | "With both FP DP and 16, any FP conversion is legal!")(static_cast <bool> ((!Subtarget->hasFP64() || !Subtarget ->hasFPARMv8Base()) && "With both FP DP and 16, any FP conversion is legal!" ) ? void (0) : __assert_fail ("(!Subtarget->hasFP64() || !Subtarget->hasFPARMv8Base()) && \"With both FP DP and 16, any FP conversion is legal!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 20506, __extension__ __PRETTY_FUNCTION__)); | ||||
20507 | |||||
20508 | assert(!(DstSz == 32 && Subtarget->hasFP16()) &&(static_cast <bool> (!(DstSz == 32 && Subtarget ->hasFP16()) && "With FP16, 16 to 32 conversion is legal!" ) ? void (0) : __assert_fail ("!(DstSz == 32 && Subtarget->hasFP16()) && \"With FP16, 16 to 32 conversion is legal!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 20509, __extension__ __PRETTY_FUNCTION__)) | ||||
20509 | "With FP16, 16 to 32 conversion is legal!")(static_cast <bool> (!(DstSz == 32 && Subtarget ->hasFP16()) && "With FP16, 16 to 32 conversion is legal!" ) ? void (0) : __assert_fail ("!(DstSz == 32 && Subtarget->hasFP16()) && \"With FP16, 16 to 32 conversion is legal!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 20509, __extension__ __PRETTY_FUNCTION__)); | ||||
20510 | |||||
20511 | // Converting from 32 -> 64 is valid if we have FP64. | ||||
20512 | if (SrcSz == 32 && DstSz == 64 && Subtarget->hasFP64()) { | ||||
20513 | // FIXME: Remove this when we have strict fp instruction selection patterns | ||||
20514 | if (IsStrict) { | ||||
20515 | SDLoc Loc(Op); | ||||
20516 | SDValue Result = DAG.getNode(ISD::FP_EXTEND, | ||||
20517 | Loc, Op.getValueType(), SrcVal); | ||||
20518 | return DAG.getMergeValues({Result, Op.getOperand(0)}, Loc); | ||||
20519 | } | ||||
20520 | return Op; | ||||
20521 | } | ||||
20522 | |||||
20523 | // Either we are converting from 16 -> 64, without FP16 and/or | ||||
20524 | // FP.double-precision or without Armv8-fp. So we must do it in two | ||||
20525 | // steps. | ||||
20526 | // Or we are converting from 32 -> 64 without fp.double-precision or 16 -> 32 | ||||
20527 | // without FP16. So we must do a function call. | ||||
20528 | SDLoc Loc(Op); | ||||
20529 | RTLIB::Libcall LC; | ||||
20530 | MakeLibCallOptions CallOptions; | ||||
20531 | SDValue Chain = IsStrict ? Op.getOperand(0) : SDValue(); | ||||
20532 | for (unsigned Sz = SrcSz; Sz <= 32 && Sz < DstSz; Sz *= 2) { | ||||
20533 | bool Supported = (Sz == 16 ? Subtarget->hasFP16() : Subtarget->hasFP64()); | ||||
20534 | MVT SrcVT = (Sz == 16 ? MVT::f16 : MVT::f32); | ||||
20535 | MVT DstVT = (Sz == 16 ? MVT::f32 : MVT::f64); | ||||
20536 | if (Supported) { | ||||
20537 | if (IsStrict) { | ||||
20538 | SrcVal = DAG.getNode(ISD::STRICT_FP_EXTEND, Loc, | ||||
20539 | {DstVT, MVT::Other}, {Chain, SrcVal}); | ||||
20540 | Chain = SrcVal.getValue(1); | ||||
20541 | } else { | ||||
20542 | SrcVal = DAG.getNode(ISD::FP_EXTEND, Loc, DstVT, SrcVal); | ||||
20543 | } | ||||
20544 | } else { | ||||
20545 | LC = RTLIB::getFPEXT(SrcVT, DstVT); | ||||
20546 | assert(LC != RTLIB::UNKNOWN_LIBCALL &&(static_cast <bool> (LC != RTLIB::UNKNOWN_LIBCALL && "Unexpected type for custom-lowering FP_EXTEND") ? void (0) : __assert_fail ("LC != RTLIB::UNKNOWN_LIBCALL && \"Unexpected type for custom-lowering FP_EXTEND\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 20547, __extension__ __PRETTY_FUNCTION__)) | ||||
20547 | "Unexpected type for custom-lowering FP_EXTEND")(static_cast <bool> (LC != RTLIB::UNKNOWN_LIBCALL && "Unexpected type for custom-lowering FP_EXTEND") ? void (0) : __assert_fail ("LC != RTLIB::UNKNOWN_LIBCALL && \"Unexpected type for custom-lowering FP_EXTEND\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 20547, __extension__ __PRETTY_FUNCTION__)); | ||||
20548 | std::tie(SrcVal, Chain) = makeLibCall(DAG, LC, DstVT, SrcVal, CallOptions, | ||||
20549 | Loc, Chain); | ||||
20550 | } | ||||
20551 | } | ||||
20552 | |||||
20553 | return IsStrict ? DAG.getMergeValues({SrcVal, Chain}, Loc) : SrcVal; | ||||
20554 | } | ||||
20555 | |||||
20556 | SDValue ARMTargetLowering::LowerFP_ROUND(SDValue Op, SelectionDAG &DAG) const { | ||||
20557 | bool IsStrict = Op->isStrictFPOpcode(); | ||||
20558 | |||||
20559 | SDValue SrcVal = Op.getOperand(IsStrict ? 1 : 0); | ||||
20560 | EVT SrcVT = SrcVal.getValueType(); | ||||
20561 | EVT DstVT = Op.getValueType(); | ||||
20562 | const unsigned DstSz = Op.getValueType().getSizeInBits(); | ||||
20563 | const unsigned SrcSz = SrcVT.getSizeInBits(); | ||||
20564 | (void)DstSz; | ||||
20565 | assert(DstSz < SrcSz && SrcSz <= 64 && DstSz >= 16 &&(static_cast <bool> (DstSz < SrcSz && SrcSz <= 64 && DstSz >= 16 && "Unexpected type for custom-lowering FP_ROUND" ) ? void (0) : __assert_fail ("DstSz < SrcSz && SrcSz <= 64 && DstSz >= 16 && \"Unexpected type for custom-lowering FP_ROUND\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 20566, __extension__ __PRETTY_FUNCTION__)) | ||||
20566 | "Unexpected type for custom-lowering FP_ROUND")(static_cast <bool> (DstSz < SrcSz && SrcSz <= 64 && DstSz >= 16 && "Unexpected type for custom-lowering FP_ROUND" ) ? void (0) : __assert_fail ("DstSz < SrcSz && SrcSz <= 64 && DstSz >= 16 && \"Unexpected type for custom-lowering FP_ROUND\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 20566, __extension__ __PRETTY_FUNCTION__)); | ||||
20567 | |||||
20568 | assert((!Subtarget->hasFP64() || !Subtarget->hasFPARMv8Base()) &&(static_cast <bool> ((!Subtarget->hasFP64() || !Subtarget ->hasFPARMv8Base()) && "With both FP DP and 16, any FP conversion is legal!" ) ? void (0) : __assert_fail ("(!Subtarget->hasFP64() || !Subtarget->hasFPARMv8Base()) && \"With both FP DP and 16, any FP conversion is legal!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 20569, __extension__ __PRETTY_FUNCTION__)) | ||||
20569 | "With both FP DP and 16, any FP conversion is legal!")(static_cast <bool> ((!Subtarget->hasFP64() || !Subtarget ->hasFPARMv8Base()) && "With both FP DP and 16, any FP conversion is legal!" ) ? void (0) : __assert_fail ("(!Subtarget->hasFP64() || !Subtarget->hasFPARMv8Base()) && \"With both FP DP and 16, any FP conversion is legal!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 20569, __extension__ __PRETTY_FUNCTION__)); | ||||
20570 | |||||
20571 | SDLoc Loc(Op); | ||||
20572 | |||||
20573 | // Instruction from 32 -> 16 if hasFP16 is valid | ||||
20574 | if (SrcSz == 32 && Subtarget->hasFP16()) | ||||
20575 | return Op; | ||||
20576 | |||||
20577 | // Lib call from 32 -> 16 / 64 -> [32, 16] | ||||
20578 | RTLIB::Libcall LC = RTLIB::getFPROUND(SrcVT, DstVT); | ||||
20579 | assert(LC != RTLIB::UNKNOWN_LIBCALL &&(static_cast <bool> (LC != RTLIB::UNKNOWN_LIBCALL && "Unexpected type for custom-lowering FP_ROUND") ? void (0) : __assert_fail ("LC != RTLIB::UNKNOWN_LIBCALL && \"Unexpected type for custom-lowering FP_ROUND\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 20580, __extension__ __PRETTY_FUNCTION__)) | ||||
20580 | "Unexpected type for custom-lowering FP_ROUND")(static_cast <bool> (LC != RTLIB::UNKNOWN_LIBCALL && "Unexpected type for custom-lowering FP_ROUND") ? void (0) : __assert_fail ("LC != RTLIB::UNKNOWN_LIBCALL && \"Unexpected type for custom-lowering FP_ROUND\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 20580, __extension__ __PRETTY_FUNCTION__)); | ||||
20581 | MakeLibCallOptions CallOptions; | ||||
20582 | SDValue Chain = IsStrict ? Op.getOperand(0) : SDValue(); | ||||
20583 | SDValue Result; | ||||
20584 | std::tie(Result, Chain) = makeLibCall(DAG, LC, DstVT, SrcVal, CallOptions, | ||||
20585 | Loc, Chain); | ||||
20586 | return IsStrict ? DAG.getMergeValues({Result, Chain}, Loc) : Result; | ||||
20587 | } | ||||
20588 | |||||
20589 | bool | ||||
20590 | ARMTargetLowering::isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const { | ||||
20591 | // The ARM target isn't yet aware of offsets. | ||||
20592 | return false; | ||||
20593 | } | ||||
20594 | |||||
20595 | bool ARM::isBitFieldInvertedMask(unsigned v) { | ||||
20596 | if (v == 0xffffffff) | ||||
20597 | return false; | ||||
20598 | |||||
20599 | // there can be 1's on either or both "outsides", all the "inside" | ||||
20600 | // bits must be 0's | ||||
20601 | return isShiftedMask_32(~v); | ||||
20602 | } | ||||
20603 | |||||
20604 | /// isFPImmLegal - Returns true if the target can instruction select the | ||||
20605 | /// specified FP immediate natively. If false, the legalizer will | ||||
20606 | /// materialize the FP immediate as a load from a constant pool. | ||||
20607 | bool ARMTargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT, | ||||
20608 | bool ForCodeSize) const { | ||||
20609 | if (!Subtarget->hasVFP3Base()) | ||||
20610 | return false; | ||||
20611 | if (VT == MVT::f16 && Subtarget->hasFullFP16()) | ||||
20612 | return ARM_AM::getFP16Imm(Imm) != -1; | ||||
20613 | if (VT == MVT::f32 && Subtarget->hasFullFP16() && | ||||
20614 | ARM_AM::getFP32FP16Imm(Imm) != -1) | ||||
20615 | return true; | ||||
20616 | if (VT == MVT::f32) | ||||
20617 | return ARM_AM::getFP32Imm(Imm) != -1; | ||||
20618 | if (VT == MVT::f64 && Subtarget->hasFP64()) | ||||
20619 | return ARM_AM::getFP64Imm(Imm) != -1; | ||||
20620 | return false; | ||||
20621 | } | ||||
20622 | |||||
20623 | /// getTgtMemIntrinsic - Represent NEON load and store intrinsics as | ||||
20624 | /// MemIntrinsicNodes. The associated MachineMemOperands record the alignment | ||||
20625 | /// specified in the intrinsic calls. | ||||
20626 | bool ARMTargetLowering::getTgtMemIntrinsic(IntrinsicInfo &Info, | ||||
20627 | const CallInst &I, | ||||
20628 | MachineFunction &MF, | ||||
20629 | unsigned Intrinsic) const { | ||||
20630 | switch (Intrinsic) { | ||||
20631 | case Intrinsic::arm_neon_vld1: | ||||
20632 | case Intrinsic::arm_neon_vld2: | ||||
20633 | case Intrinsic::arm_neon_vld3: | ||||
20634 | case Intrinsic::arm_neon_vld4: | ||||
20635 | case Intrinsic::arm_neon_vld2lane: | ||||
20636 | case Intrinsic::arm_neon_vld3lane: | ||||
20637 | case Intrinsic::arm_neon_vld4lane: | ||||
20638 | case Intrinsic::arm_neon_vld2dup: | ||||
20639 | case Intrinsic::arm_neon_vld3dup: | ||||
20640 | case Intrinsic::arm_neon_vld4dup: { | ||||
20641 | Info.opc = ISD::INTRINSIC_W_CHAIN; | ||||
20642 | // Conservatively set memVT to the entire set of vectors loaded. | ||||
20643 | auto &DL = I.getCalledFunction()->getParent()->getDataLayout(); | ||||
20644 | uint64_t NumElts = DL.getTypeSizeInBits(I.getType()) / 64; | ||||
20645 | Info.memVT = EVT::getVectorVT(I.getType()->getContext(), MVT::i64, NumElts); | ||||
20646 | Info.ptrVal = I.getArgOperand(0); | ||||
20647 | Info.offset = 0; | ||||
20648 | Value *AlignArg = I.getArgOperand(I.arg_size() - 1); | ||||
20649 | Info.align = cast<ConstantInt>(AlignArg)->getMaybeAlignValue(); | ||||
20650 | // volatile loads with NEON intrinsics not supported | ||||
20651 | Info.flags = MachineMemOperand::MOLoad; | ||||
20652 | return true; | ||||
20653 | } | ||||
20654 | case Intrinsic::arm_neon_vld1x2: | ||||
20655 | case Intrinsic::arm_neon_vld1x3: | ||||
20656 | case Intrinsic::arm_neon_vld1x4: { | ||||
20657 | Info.opc = ISD::INTRINSIC_W_CHAIN; | ||||
20658 | // Conservatively set memVT to the entire set of vectors loaded. | ||||
20659 | auto &DL = I.getCalledFunction()->getParent()->getDataLayout(); | ||||
20660 | uint64_t NumElts = DL.getTypeSizeInBits(I.getType()) / 64; | ||||
20661 | Info.memVT = EVT::getVectorVT(I.getType()->getContext(), MVT::i64, NumElts); | ||||
20662 | Info.ptrVal = I.getArgOperand(I.arg_size() - 1); | ||||
20663 | Info.offset = 0; | ||||
20664 | Info.align.reset(); | ||||
20665 | // volatile loads with NEON intrinsics not supported | ||||
20666 | Info.flags = MachineMemOperand::MOLoad; | ||||
20667 | return true; | ||||
20668 | } | ||||
20669 | case Intrinsic::arm_neon_vst1: | ||||
20670 | case Intrinsic::arm_neon_vst2: | ||||
20671 | case Intrinsic::arm_neon_vst3: | ||||
20672 | case Intrinsic::arm_neon_vst4: | ||||
20673 | case Intrinsic::arm_neon_vst2lane: | ||||
20674 | case Intrinsic::arm_neon_vst3lane: | ||||
20675 | case Intrinsic::arm_neon_vst4lane: { | ||||
20676 | Info.opc = ISD::INTRINSIC_VOID; | ||||
20677 | // Conservatively set memVT to the entire set of vectors stored. | ||||
20678 | auto &DL = I.getCalledFunction()->getParent()->getDataLayout(); | ||||
20679 | unsigned NumElts = 0; | ||||
20680 | for (unsigned ArgI = 1, ArgE = I.arg_size(); ArgI < ArgE; ++ArgI) { | ||||
20681 | Type *ArgTy = I.getArgOperand(ArgI)->getType(); | ||||
20682 | if (!ArgTy->isVectorTy()) | ||||
20683 | break; | ||||
20684 | NumElts += DL.getTypeSizeInBits(ArgTy) / 64; | ||||
20685 | } | ||||
20686 | Info.memVT = EVT::getVectorVT(I.getType()->getContext(), MVT::i64, NumElts); | ||||
20687 | Info.ptrVal = I.getArgOperand(0); | ||||
20688 | Info.offset = 0; | ||||
20689 | Value *AlignArg = I.getArgOperand(I.arg_size() - 1); | ||||
20690 | Info.align = cast<ConstantInt>(AlignArg)->getMaybeAlignValue(); | ||||
20691 | // volatile stores with NEON intrinsics not supported | ||||
20692 | Info.flags = MachineMemOperand::MOStore; | ||||
20693 | return true; | ||||
20694 | } | ||||
20695 | case Intrinsic::arm_neon_vst1x2: | ||||
20696 | case Intrinsic::arm_neon_vst1x3: | ||||
20697 | case Intrinsic::arm_neon_vst1x4: { | ||||
20698 | Info.opc = ISD::INTRINSIC_VOID; | ||||
20699 | // Conservatively set memVT to the entire set of vectors stored. | ||||
20700 | auto &DL = I.getCalledFunction()->getParent()->getDataLayout(); | ||||
20701 | unsigned NumElts = 0; | ||||
20702 | for (unsigned ArgI = 1, ArgE = I.arg_size(); ArgI < ArgE; ++ArgI) { | ||||
20703 | Type *ArgTy = I.getArgOperand(ArgI)->getType(); | ||||
20704 | if (!ArgTy->isVectorTy()) | ||||
20705 | break; | ||||
20706 | NumElts += DL.getTypeSizeInBits(ArgTy) / 64; | ||||
20707 | } | ||||
20708 | Info.memVT = EVT::getVectorVT(I.getType()->getContext(), MVT::i64, NumElts); | ||||
20709 | Info.ptrVal = I.getArgOperand(0); | ||||
20710 | Info.offset = 0; | ||||
20711 | Info.align.reset(); | ||||
20712 | // volatile stores with NEON intrinsics not supported | ||||
20713 | Info.flags = MachineMemOperand::MOStore; | ||||
20714 | return true; | ||||
20715 | } | ||||
20716 | case Intrinsic::arm_mve_vld2q: | ||||
20717 | case Intrinsic::arm_mve_vld4q: { | ||||
20718 | Info.opc = ISD::INTRINSIC_W_CHAIN; | ||||
20719 | // Conservatively set memVT to the entire set of vectors loaded. | ||||
20720 | Type *VecTy = cast<StructType>(I.getType())->getElementType(1); | ||||
20721 | unsigned Factor = Intrinsic == Intrinsic::arm_mve_vld2q ? 2 : 4; | ||||
20722 | Info.memVT = EVT::getVectorVT(VecTy->getContext(), MVT::i64, Factor * 2); | ||||
20723 | Info.ptrVal = I.getArgOperand(0); | ||||
20724 | Info.offset = 0; | ||||
20725 | Info.align = Align(VecTy->getScalarSizeInBits() / 8); | ||||
20726 | // volatile loads with MVE intrinsics not supported | ||||
20727 | Info.flags = MachineMemOperand::MOLoad; | ||||
20728 | return true; | ||||
20729 | } | ||||
20730 | case Intrinsic::arm_mve_vst2q: | ||||
20731 | case Intrinsic::arm_mve_vst4q: { | ||||
20732 | Info.opc = ISD::INTRINSIC_VOID; | ||||
20733 | // Conservatively set memVT to the entire set of vectors stored. | ||||
20734 | Type *VecTy = I.getArgOperand(1)->getType(); | ||||
20735 | unsigned Factor = Intrinsic == Intrinsic::arm_mve_vst2q ? 2 : 4; | ||||
20736 | Info.memVT = EVT::getVectorVT(VecTy->getContext(), MVT::i64, Factor * 2); | ||||
20737 | Info.ptrVal = I.getArgOperand(0); | ||||
20738 | Info.offset = 0; | ||||
20739 | Info.align = Align(VecTy->getScalarSizeInBits() / 8); | ||||
20740 | // volatile stores with MVE intrinsics not supported | ||||
20741 | Info.flags = MachineMemOperand::MOStore; | ||||
20742 | return true; | ||||
20743 | } | ||||
20744 | case Intrinsic::arm_mve_vldr_gather_base: | ||||
20745 | case Intrinsic::arm_mve_vldr_gather_base_predicated: { | ||||
20746 | Info.opc = ISD::INTRINSIC_W_CHAIN; | ||||
20747 | Info.ptrVal = nullptr; | ||||
20748 | Info.memVT = MVT::getVT(I.getType()); | ||||
20749 | Info.align = Align(1); | ||||
20750 | Info.flags |= MachineMemOperand::MOLoad; | ||||
20751 | return true; | ||||
20752 | } | ||||
20753 | case Intrinsic::arm_mve_vldr_gather_base_wb: | ||||
20754 | case Intrinsic::arm_mve_vldr_gather_base_wb_predicated: { | ||||
20755 | Info.opc = ISD::INTRINSIC_W_CHAIN; | ||||
20756 | Info.ptrVal = nullptr; | ||||
20757 | Info.memVT = MVT::getVT(I.getType()->getContainedType(0)); | ||||
20758 | Info.align = Align(1); | ||||
20759 | Info.flags |= MachineMemOperand::MOLoad; | ||||
20760 | return true; | ||||
20761 | } | ||||
20762 | case Intrinsic::arm_mve_vldr_gather_offset: | ||||
20763 | case Intrinsic::arm_mve_vldr_gather_offset_predicated: { | ||||
20764 | Info.opc = ISD::INTRINSIC_W_CHAIN; | ||||
20765 | Info.ptrVal = nullptr; | ||||
20766 | MVT DataVT = MVT::getVT(I.getType()); | ||||
20767 | unsigned MemSize = cast<ConstantInt>(I.getArgOperand(2))->getZExtValue(); | ||||
20768 | Info.memVT = MVT::getVectorVT(MVT::getIntegerVT(MemSize), | ||||
20769 | DataVT.getVectorNumElements()); | ||||
20770 | Info.align = Align(1); | ||||
20771 | Info.flags |= MachineMemOperand::MOLoad; | ||||
20772 | return true; | ||||
20773 | } | ||||
20774 | case Intrinsic::arm_mve_vstr_scatter_base: | ||||
20775 | case Intrinsic::arm_mve_vstr_scatter_base_predicated: { | ||||
20776 | Info.opc = ISD::INTRINSIC_VOID; | ||||
20777 | Info.ptrVal = nullptr; | ||||
20778 | Info.memVT = MVT::getVT(I.getArgOperand(2)->getType()); | ||||
20779 | Info.align = Align(1); | ||||
20780 | Info.flags |= MachineMemOperand::MOStore; | ||||
20781 | return true; | ||||
20782 | } | ||||
20783 | case Intrinsic::arm_mve_vstr_scatter_base_wb: | ||||
20784 | case Intrinsic::arm_mve_vstr_scatter_base_wb_predicated: { | ||||
20785 | Info.opc = ISD::INTRINSIC_W_CHAIN; | ||||
20786 | Info.ptrVal = nullptr; | ||||
20787 | Info.memVT = MVT::getVT(I.getArgOperand(2)->getType()); | ||||
20788 | Info.align = Align(1); | ||||
20789 | Info.flags |= MachineMemOperand::MOStore; | ||||
20790 | return true; | ||||
20791 | } | ||||
20792 | case Intrinsic::arm_mve_vstr_scatter_offset: | ||||
20793 | case Intrinsic::arm_mve_vstr_scatter_offset_predicated: { | ||||
20794 | Info.opc = ISD::INTRINSIC_VOID; | ||||
20795 | Info.ptrVal = nullptr; | ||||
20796 | MVT DataVT = MVT::getVT(I.getArgOperand(2)->getType()); | ||||
20797 | unsigned MemSize = cast<ConstantInt>(I.getArgOperand(3))->getZExtValue(); | ||||
20798 | Info.memVT = MVT::getVectorVT(MVT::getIntegerVT(MemSize), | ||||
20799 | DataVT.getVectorNumElements()); | ||||
20800 | Info.align = Align(1); | ||||
20801 | Info.flags |= MachineMemOperand::MOStore; | ||||
20802 | return true; | ||||
20803 | } | ||||
20804 | case Intrinsic::arm_ldaex: | ||||
20805 | case Intrinsic::arm_ldrex: { | ||||
20806 | auto &DL = I.getCalledFunction()->getParent()->getDataLayout(); | ||||
20807 | Type *ValTy = I.getParamElementType(0); | ||||
20808 | Info.opc = ISD::INTRINSIC_W_CHAIN; | ||||
20809 | Info.memVT = MVT::getVT(ValTy); | ||||
20810 | Info.ptrVal = I.getArgOperand(0); | ||||
20811 | Info.offset = 0; | ||||
20812 | Info.align = DL.getABITypeAlign(ValTy); | ||||
20813 | Info.flags = MachineMemOperand::MOLoad | MachineMemOperand::MOVolatile; | ||||
20814 | return true; | ||||
20815 | } | ||||
20816 | case Intrinsic::arm_stlex: | ||||
20817 | case Intrinsic::arm_strex: { | ||||
20818 | auto &DL = I.getCalledFunction()->getParent()->getDataLayout(); | ||||
20819 | Type *ValTy = I.getParamElementType(1); | ||||
20820 | Info.opc = ISD::INTRINSIC_W_CHAIN; | ||||
20821 | Info.memVT = MVT::getVT(ValTy); | ||||
20822 | Info.ptrVal = I.getArgOperand(1); | ||||
20823 | Info.offset = 0; | ||||
20824 | Info.align = DL.getABITypeAlign(ValTy); | ||||
20825 | Info.flags = MachineMemOperand::MOStore | MachineMemOperand::MOVolatile; | ||||
20826 | return true; | ||||
20827 | } | ||||
20828 | case Intrinsic::arm_stlexd: | ||||
20829 | case Intrinsic::arm_strexd: | ||||
20830 | Info.opc = ISD::INTRINSIC_W_CHAIN; | ||||
20831 | Info.memVT = MVT::i64; | ||||
20832 | Info.ptrVal = I.getArgOperand(2); | ||||
20833 | Info.offset = 0; | ||||
20834 | Info.align = Align(8); | ||||
20835 | Info.flags = MachineMemOperand::MOStore | MachineMemOperand::MOVolatile; | ||||
20836 | return true; | ||||
20837 | |||||
20838 | case Intrinsic::arm_ldaexd: | ||||
20839 | case Intrinsic::arm_ldrexd: | ||||
20840 | Info.opc = ISD::INTRINSIC_W_CHAIN; | ||||
20841 | Info.memVT = MVT::i64; | ||||
20842 | Info.ptrVal = I.getArgOperand(0); | ||||
20843 | Info.offset = 0; | ||||
20844 | Info.align = Align(8); | ||||
20845 | Info.flags = MachineMemOperand::MOLoad | MachineMemOperand::MOVolatile; | ||||
20846 | return true; | ||||
20847 | |||||
20848 | default: | ||||
20849 | break; | ||||
20850 | } | ||||
20851 | |||||
20852 | return false; | ||||
20853 | } | ||||
20854 | |||||
20855 | /// Returns true if it is beneficial to convert a load of a constant | ||||
20856 | /// to just the constant itself. | ||||
20857 | bool ARMTargetLowering::shouldConvertConstantLoadToIntImm(const APInt &Imm, | ||||
20858 | Type *Ty) const { | ||||
20859 | assert(Ty->isIntegerTy())(static_cast <bool> (Ty->isIntegerTy()) ? void (0) : __assert_fail ("Ty->isIntegerTy()", "llvm/lib/Target/ARM/ARMISelLowering.cpp" , 20859, __extension__ __PRETTY_FUNCTION__)); | ||||
20860 | |||||
20861 | unsigned Bits = Ty->getPrimitiveSizeInBits(); | ||||
20862 | if (Bits == 0 || Bits > 32) | ||||
20863 | return false; | ||||
20864 | return true; | ||||
20865 | } | ||||
20866 | |||||
20867 | bool ARMTargetLowering::isExtractSubvectorCheap(EVT ResVT, EVT SrcVT, | ||||
20868 | unsigned Index) const { | ||||
20869 | if (!isOperationLegalOrCustom(ISD::EXTRACT_SUBVECTOR, ResVT)) | ||||
20870 | return false; | ||||
20871 | |||||
20872 | return (Index == 0 || Index == ResVT.getVectorNumElements()); | ||||
20873 | } | ||||
20874 | |||||
20875 | Instruction *ARMTargetLowering::makeDMB(IRBuilderBase &Builder, | ||||
20876 | ARM_MB::MemBOpt Domain) const { | ||||
20877 | Module *M = Builder.GetInsertBlock()->getParent()->getParent(); | ||||
20878 | |||||
20879 | // First, if the target has no DMB, see what fallback we can use. | ||||
20880 | if (!Subtarget->hasDataBarrier()) { | ||||
20881 | // Some ARMv6 cpus can support data barriers with an mcr instruction. | ||||
20882 | // Thumb1 and pre-v6 ARM mode use a libcall instead and should never get | ||||
20883 | // here. | ||||
20884 | if (Subtarget->hasV6Ops() && !Subtarget->isThumb()) { | ||||
20885 | Function *MCR = Intrinsic::getDeclaration(M, Intrinsic::arm_mcr); | ||||
20886 | Value* args[6] = {Builder.getInt32(15), Builder.getInt32(0), | ||||
20887 | Builder.getInt32(0), Builder.getInt32(7), | ||||
20888 | Builder.getInt32(10), Builder.getInt32(5)}; | ||||
20889 | return Builder.CreateCall(MCR, args); | ||||
20890 | } else { | ||||
20891 | // Instead of using barriers, atomic accesses on these subtargets use | ||||
20892 | // libcalls. | ||||
20893 | llvm_unreachable("makeDMB on a target so old that it has no barriers")::llvm::llvm_unreachable_internal("makeDMB on a target so old that it has no barriers" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 20893); | ||||
20894 | } | ||||
20895 | } else { | ||||
20896 | Function *DMB = Intrinsic::getDeclaration(M, Intrinsic::arm_dmb); | ||||
20897 | // Only a full system barrier exists in the M-class architectures. | ||||
20898 | Domain = Subtarget->isMClass() ? ARM_MB::SY : Domain; | ||||
20899 | Constant *CDomain = Builder.getInt32(Domain); | ||||
20900 | return Builder.CreateCall(DMB, CDomain); | ||||
20901 | } | ||||
20902 | } | ||||
20903 | |||||
20904 | // Based on http://www.cl.cam.ac.uk/~pes20/cpp/cpp0xmappings.html | ||||
20905 | Instruction *ARMTargetLowering::emitLeadingFence(IRBuilderBase &Builder, | ||||
20906 | Instruction *Inst, | ||||
20907 | AtomicOrdering Ord) const { | ||||
20908 | switch (Ord) { | ||||
20909 | case AtomicOrdering::NotAtomic: | ||||
20910 | case AtomicOrdering::Unordered: | ||||
20911 | llvm_unreachable("Invalid fence: unordered/non-atomic")::llvm::llvm_unreachable_internal("Invalid fence: unordered/non-atomic" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 20911); | ||||
20912 | case AtomicOrdering::Monotonic: | ||||
20913 | case AtomicOrdering::Acquire: | ||||
20914 | return nullptr; // Nothing to do | ||||
20915 | case AtomicOrdering::SequentiallyConsistent: | ||||
20916 | if (!Inst->hasAtomicStore()) | ||||
20917 | return nullptr; // Nothing to do | ||||
20918 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||
20919 | case AtomicOrdering::Release: | ||||
20920 | case AtomicOrdering::AcquireRelease: | ||||
20921 | if (Subtarget->preferISHSTBarriers()) | ||||
20922 | return makeDMB(Builder, ARM_MB::ISHST); | ||||
20923 | // FIXME: add a comment with a link to documentation justifying this. | ||||
20924 | else | ||||
20925 | return makeDMB(Builder, ARM_MB::ISH); | ||||
20926 | } | ||||
20927 | llvm_unreachable("Unknown fence ordering in emitLeadingFence")::llvm::llvm_unreachable_internal("Unknown fence ordering in emitLeadingFence" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 20927); | ||||
20928 | } | ||||
20929 | |||||
20930 | Instruction *ARMTargetLowering::emitTrailingFence(IRBuilderBase &Builder, | ||||
20931 | Instruction *Inst, | ||||
20932 | AtomicOrdering Ord) const { | ||||
20933 | switch (Ord) { | ||||
20934 | case AtomicOrdering::NotAtomic: | ||||
20935 | case AtomicOrdering::Unordered: | ||||
20936 | llvm_unreachable("Invalid fence: unordered/not-atomic")::llvm::llvm_unreachable_internal("Invalid fence: unordered/not-atomic" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 20936); | ||||
20937 | case AtomicOrdering::Monotonic: | ||||
20938 | case AtomicOrdering::Release: | ||||
20939 | return nullptr; // Nothing to do | ||||
20940 | case AtomicOrdering::Acquire: | ||||
20941 | case AtomicOrdering::AcquireRelease: | ||||
20942 | case AtomicOrdering::SequentiallyConsistent: | ||||
20943 | return makeDMB(Builder, ARM_MB::ISH); | ||||
20944 | } | ||||
20945 | llvm_unreachable("Unknown fence ordering in emitTrailingFence")::llvm::llvm_unreachable_internal("Unknown fence ordering in emitTrailingFence" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 20945); | ||||
20946 | } | ||||
20947 | |||||
20948 | // Loads and stores less than 64-bits are already atomic; ones above that | ||||
20949 | // are doomed anyway, so defer to the default libcall and blame the OS when | ||||
20950 | // things go wrong. Cortex M doesn't have ldrexd/strexd though, so don't emit | ||||
20951 | // anything for those. | ||||
20952 | TargetLoweringBase::AtomicExpansionKind | ||||
20953 | ARMTargetLowering::shouldExpandAtomicStoreInIR(StoreInst *SI) const { | ||||
20954 | bool has64BitAtomicStore; | ||||
20955 | if (Subtarget->isMClass()) | ||||
20956 | has64BitAtomicStore = false; | ||||
20957 | else if (Subtarget->isThumb()) | ||||
20958 | has64BitAtomicStore = Subtarget->hasV7Ops(); | ||||
20959 | else | ||||
20960 | has64BitAtomicStore = Subtarget->hasV6Ops(); | ||||
20961 | |||||
20962 | unsigned Size = SI->getValueOperand()->getType()->getPrimitiveSizeInBits(); | ||||
20963 | return Size == 64 && has64BitAtomicStore ? AtomicExpansionKind::Expand | ||||
20964 | : AtomicExpansionKind::None; | ||||
20965 | } | ||||
20966 | |||||
20967 | // Loads and stores less than 64-bits are already atomic; ones above that | ||||
20968 | // are doomed anyway, so defer to the default libcall and blame the OS when | ||||
20969 | // things go wrong. Cortex M doesn't have ldrexd/strexd though, so don't emit | ||||
20970 | // anything for those. | ||||
20971 | // FIXME: ldrd and strd are atomic if the CPU has LPAE (e.g. A15 has that | ||||
20972 | // guarantee, see DDI0406C ARM architecture reference manual, | ||||
20973 | // sections A8.8.72-74 LDRD) | ||||
20974 | TargetLowering::AtomicExpansionKind | ||||
20975 | ARMTargetLowering::shouldExpandAtomicLoadInIR(LoadInst *LI) const { | ||||
20976 | bool has64BitAtomicLoad; | ||||
20977 | if (Subtarget->isMClass()) | ||||
20978 | has64BitAtomicLoad = false; | ||||
20979 | else if (Subtarget->isThumb()) | ||||
20980 | has64BitAtomicLoad = Subtarget->hasV7Ops(); | ||||
20981 | else | ||||
20982 | has64BitAtomicLoad = Subtarget->hasV6Ops(); | ||||
20983 | |||||
20984 | unsigned Size = LI->getType()->getPrimitiveSizeInBits(); | ||||
20985 | return (Size == 64 && has64BitAtomicLoad) ? AtomicExpansionKind::LLOnly | ||||
20986 | : AtomicExpansionKind::None; | ||||
20987 | } | ||||
20988 | |||||
20989 | // For the real atomic operations, we have ldrex/strex up to 32 bits, | ||||
20990 | // and up to 64 bits on the non-M profiles | ||||
20991 | TargetLowering::AtomicExpansionKind | ||||
20992 | ARMTargetLowering::shouldExpandAtomicRMWInIR(AtomicRMWInst *AI) const { | ||||
20993 | if (AI->isFloatingPointOperation()) | ||||
20994 | return AtomicExpansionKind::CmpXChg; | ||||
20995 | |||||
20996 | unsigned Size = AI->getType()->getPrimitiveSizeInBits(); | ||||
20997 | bool hasAtomicRMW; | ||||
20998 | if (Subtarget->isMClass()) | ||||
20999 | hasAtomicRMW = Subtarget->hasV8MBaselineOps(); | ||||
21000 | else if (Subtarget->isThumb()) | ||||
21001 | hasAtomicRMW = Subtarget->hasV7Ops(); | ||||
21002 | else | ||||
21003 | hasAtomicRMW = Subtarget->hasV6Ops(); | ||||
21004 | if (Size <= (Subtarget->isMClass() ? 32U : 64U) && hasAtomicRMW) { | ||||
21005 | // At -O0, fast-regalloc cannot cope with the live vregs necessary to | ||||
21006 | // implement atomicrmw without spilling. If the target address is also on | ||||
21007 | // the stack and close enough to the spill slot, this can lead to a | ||||
21008 | // situation where the monitor always gets cleared and the atomic operation | ||||
21009 | // can never succeed. So at -O0 lower this operation to a CAS loop. | ||||
21010 | if (getTargetMachine().getOptLevel() == CodeGenOpt::None) | ||||
21011 | return AtomicExpansionKind::CmpXChg; | ||||
21012 | return AtomicExpansionKind::LLSC; | ||||
21013 | } | ||||
21014 | return AtomicExpansionKind::None; | ||||
21015 | } | ||||
21016 | |||||
21017 | // Similar to shouldExpandAtomicRMWInIR, ldrex/strex can be used up to 32 | ||||
21018 | // bits, and up to 64 bits on the non-M profiles. | ||||
21019 | TargetLowering::AtomicExpansionKind | ||||
21020 | ARMTargetLowering::shouldExpandAtomicCmpXchgInIR(AtomicCmpXchgInst *AI) const { | ||||
21021 | // At -O0, fast-regalloc cannot cope with the live vregs necessary to | ||||
21022 | // implement cmpxchg without spilling. If the address being exchanged is also | ||||
21023 | // on the stack and close enough to the spill slot, this can lead to a | ||||
21024 | // situation where the monitor always gets cleared and the atomic operation | ||||
21025 | // can never succeed. So at -O0 we need a late-expanded pseudo-inst instead. | ||||
21026 | unsigned Size = AI->getOperand(1)->getType()->getPrimitiveSizeInBits(); | ||||
21027 | bool HasAtomicCmpXchg; | ||||
21028 | if (Subtarget->isMClass()) | ||||
21029 | HasAtomicCmpXchg = Subtarget->hasV8MBaselineOps(); | ||||
21030 | else if (Subtarget->isThumb()) | ||||
21031 | HasAtomicCmpXchg = Subtarget->hasV7Ops(); | ||||
21032 | else | ||||
21033 | HasAtomicCmpXchg = Subtarget->hasV6Ops(); | ||||
21034 | if (getTargetMachine().getOptLevel() != 0 && HasAtomicCmpXchg && | ||||
21035 | Size <= (Subtarget->isMClass() ? 32U : 64U)) | ||||
21036 | return AtomicExpansionKind::LLSC; | ||||
21037 | return AtomicExpansionKind::None; | ||||
21038 | } | ||||
21039 | |||||
21040 | bool ARMTargetLowering::shouldInsertFencesForAtomic( | ||||
21041 | const Instruction *I) const { | ||||
21042 | return InsertFencesForAtomic; | ||||
21043 | } | ||||
21044 | |||||
21045 | bool ARMTargetLowering::useLoadStackGuardNode() const { return true; } | ||||
21046 | |||||
21047 | void ARMTargetLowering::insertSSPDeclarations(Module &M) const { | ||||
21048 | if (!Subtarget->getTargetTriple().isWindowsMSVCEnvironment()) | ||||
21049 | return TargetLowering::insertSSPDeclarations(M); | ||||
21050 | |||||
21051 | // MSVC CRT has a global variable holding security cookie. | ||||
21052 | M.getOrInsertGlobal("__security_cookie", | ||||
21053 | Type::getInt8PtrTy(M.getContext())); | ||||
21054 | |||||
21055 | // MSVC CRT has a function to validate security cookie. | ||||
21056 | FunctionCallee SecurityCheckCookie = M.getOrInsertFunction( | ||||
21057 | "__security_check_cookie", Type::getVoidTy(M.getContext()), | ||||
21058 | Type::getInt8PtrTy(M.getContext())); | ||||
21059 | if (Function *F = dyn_cast<Function>(SecurityCheckCookie.getCallee())) | ||||
21060 | F->addParamAttr(0, Attribute::AttrKind::InReg); | ||||
21061 | } | ||||
21062 | |||||
21063 | Value *ARMTargetLowering::getSDagStackGuard(const Module &M) const { | ||||
21064 | // MSVC CRT has a global variable holding security cookie. | ||||
21065 | if (Subtarget->getTargetTriple().isWindowsMSVCEnvironment()) | ||||
21066 | return M.getGlobalVariable("__security_cookie"); | ||||
21067 | return TargetLowering::getSDagStackGuard(M); | ||||
21068 | } | ||||
21069 | |||||
21070 | Function *ARMTargetLowering::getSSPStackGuardCheck(const Module &M) const { | ||||
21071 | // MSVC CRT has a function to validate security cookie. | ||||
21072 | if (Subtarget->getTargetTriple().isWindowsMSVCEnvironment()) | ||||
21073 | return M.getFunction("__security_check_cookie"); | ||||
21074 | return TargetLowering::getSSPStackGuardCheck(M); | ||||
21075 | } | ||||
21076 | |||||
21077 | bool ARMTargetLowering::canCombineStoreAndExtract(Type *VectorTy, Value *Idx, | ||||
21078 | unsigned &Cost) const { | ||||
21079 | // If we do not have NEON, vector types are not natively supported. | ||||
21080 | if (!Subtarget->hasNEON()) | ||||
21081 | return false; | ||||
21082 | |||||
21083 | // Floating point values and vector values map to the same register file. | ||||
21084 | // Therefore, although we could do a store extract of a vector type, this is | ||||
21085 | // better to leave at float as we have more freedom in the addressing mode for | ||||
21086 | // those. | ||||
21087 | if (VectorTy->isFPOrFPVectorTy()) | ||||
21088 | return false; | ||||
21089 | |||||
21090 | // If the index is unknown at compile time, this is very expensive to lower | ||||
21091 | // and it is not possible to combine the store with the extract. | ||||
21092 | if (!isa<ConstantInt>(Idx)) | ||||
21093 | return false; | ||||
21094 | |||||
21095 | assert(VectorTy->isVectorTy() && "VectorTy is not a vector type")(static_cast <bool> (VectorTy->isVectorTy() && "VectorTy is not a vector type") ? void (0) : __assert_fail ( "VectorTy->isVectorTy() && \"VectorTy is not a vector type\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 21095, __extension__ __PRETTY_FUNCTION__)); | ||||
21096 | unsigned BitWidth = VectorTy->getPrimitiveSizeInBits().getFixedSize(); | ||||
21097 | // We can do a store + vector extract on any vector that fits perfectly in a D | ||||
21098 | // or Q register. | ||||
21099 | if (BitWidth == 64 || BitWidth == 128) { | ||||
21100 | Cost = 0; | ||||
21101 | return true; | ||||
21102 | } | ||||
21103 | return false; | ||||
21104 | } | ||||
21105 | |||||
21106 | bool ARMTargetLowering::isCheapToSpeculateCttz() const { | ||||
21107 | return Subtarget->hasV6T2Ops(); | ||||
21108 | } | ||||
21109 | |||||
21110 | bool ARMTargetLowering::isCheapToSpeculateCtlz() const { | ||||
21111 | return Subtarget->hasV6T2Ops(); | ||||
21112 | } | ||||
21113 | |||||
21114 | bool ARMTargetLowering::shouldExpandShift(SelectionDAG &DAG, SDNode *N) const { | ||||
21115 | return !Subtarget->hasMinSize() || Subtarget->isTargetWindows(); | ||||
21116 | } | ||||
21117 | |||||
21118 | Value *ARMTargetLowering::emitLoadLinked(IRBuilderBase &Builder, Type *ValueTy, | ||||
21119 | Value *Addr, | ||||
21120 | AtomicOrdering Ord) const { | ||||
21121 | Module *M = Builder.GetInsertBlock()->getParent()->getParent(); | ||||
21122 | bool IsAcquire = isAcquireOrStronger(Ord); | ||||
21123 | |||||
21124 | // Since i64 isn't legal and intrinsics don't get type-lowered, the ldrexd | ||||
21125 | // intrinsic must return {i32, i32} and we have to recombine them into a | ||||
21126 | // single i64 here. | ||||
21127 | if (ValueTy->getPrimitiveSizeInBits() == 64) { | ||||
21128 | Intrinsic::ID Int = | ||||
21129 | IsAcquire ? Intrinsic::arm_ldaexd : Intrinsic::arm_ldrexd; | ||||
21130 | Function *Ldrex = Intrinsic::getDeclaration(M, Int); | ||||
21131 | |||||
21132 | Addr = Builder.CreateBitCast(Addr, Type::getInt8PtrTy(M->getContext())); | ||||
21133 | Value *LoHi = Builder.CreateCall(Ldrex, Addr, "lohi"); | ||||
21134 | |||||
21135 | Value *Lo = Builder.CreateExtractValue(LoHi, 0, "lo"); | ||||
21136 | Value *Hi = Builder.CreateExtractValue(LoHi, 1, "hi"); | ||||
21137 | if (!Subtarget->isLittle()) | ||||
21138 | std::swap (Lo, Hi); | ||||
21139 | Lo = Builder.CreateZExt(Lo, ValueTy, "lo64"); | ||||
21140 | Hi = Builder.CreateZExt(Hi, ValueTy, "hi64"); | ||||
21141 | return Builder.CreateOr( | ||||
21142 | Lo, Builder.CreateShl(Hi, ConstantInt::get(ValueTy, 32)), "val64"); | ||||
21143 | } | ||||
21144 | |||||
21145 | Type *Tys[] = { Addr->getType() }; | ||||
21146 | Intrinsic::ID Int = IsAcquire ? Intrinsic::arm_ldaex : Intrinsic::arm_ldrex; | ||||
21147 | Function *Ldrex = Intrinsic::getDeclaration(M, Int, Tys); | ||||
21148 | CallInst *CI = Builder.CreateCall(Ldrex, Addr); | ||||
21149 | |||||
21150 | CI->addParamAttr( | ||||
21151 | 0, Attribute::get(M->getContext(), Attribute::ElementType, ValueTy)); | ||||
21152 | return Builder.CreateTruncOrBitCast(CI, ValueTy); | ||||
21153 | } | ||||
21154 | |||||
21155 | void ARMTargetLowering::emitAtomicCmpXchgNoStoreLLBalance( | ||||
21156 | IRBuilderBase &Builder) const { | ||||
21157 | if (!Subtarget->hasV7Ops()) | ||||
21158 | return; | ||||
21159 | Module *M = Builder.GetInsertBlock()->getParent()->getParent(); | ||||
21160 | Builder.CreateCall(Intrinsic::getDeclaration(M, Intrinsic::arm_clrex)); | ||||
21161 | } | ||||
21162 | |||||
21163 | Value *ARMTargetLowering::emitStoreConditional(IRBuilderBase &Builder, | ||||
21164 | Value *Val, Value *Addr, | ||||
21165 | AtomicOrdering Ord) const { | ||||
21166 | Module *M = Builder.GetInsertBlock()->getParent()->getParent(); | ||||
21167 | bool IsRelease = isReleaseOrStronger(Ord); | ||||
21168 | |||||
21169 | // Since the intrinsics must have legal type, the i64 intrinsics take two | ||||
21170 | // parameters: "i32, i32". We must marshal Val into the appropriate form | ||||
21171 | // before the call. | ||||
21172 | if (Val->getType()->getPrimitiveSizeInBits() == 64) { | ||||
21173 | Intrinsic::ID Int = | ||||
21174 | IsRelease ? Intrinsic::arm_stlexd : Intrinsic::arm_strexd; | ||||
21175 | Function *Strex = Intrinsic::getDeclaration(M, Int); | ||||
21176 | Type *Int32Ty = Type::getInt32Ty(M->getContext()); | ||||
21177 | |||||
21178 | Value *Lo = Builder.CreateTrunc(Val, Int32Ty, "lo"); | ||||
21179 | Value *Hi = Builder.CreateTrunc(Builder.CreateLShr(Val, 32), Int32Ty, "hi"); | ||||
21180 | if (!Subtarget->isLittle()) | ||||
21181 | std::swap(Lo, Hi); | ||||
21182 | Addr = Builder.CreateBitCast(Addr, Type::getInt8PtrTy(M->getContext())); | ||||
21183 | return Builder.CreateCall(Strex, {Lo, Hi, Addr}); | ||||
21184 | } | ||||
21185 | |||||
21186 | Intrinsic::ID Int = IsRelease ? Intrinsic::arm_stlex : Intrinsic::arm_strex; | ||||
21187 | Type *Tys[] = { Addr->getType() }; | ||||
21188 | Function *Strex = Intrinsic::getDeclaration(M, Int, Tys); | ||||
21189 | |||||
21190 | CallInst *CI = Builder.CreateCall( | ||||
21191 | Strex, {Builder.CreateZExtOrBitCast( | ||||
21192 | Val, Strex->getFunctionType()->getParamType(0)), | ||||
21193 | Addr}); | ||||
21194 | CI->addParamAttr(1, Attribute::get(M->getContext(), Attribute::ElementType, | ||||
21195 | Val->getType())); | ||||
21196 | return CI; | ||||
21197 | } | ||||
21198 | |||||
21199 | |||||
21200 | bool ARMTargetLowering::alignLoopsWithOptSize() const { | ||||
21201 | return Subtarget->isMClass(); | ||||
21202 | } | ||||
21203 | |||||
21204 | /// A helper function for determining the number of interleaved accesses we | ||||
21205 | /// will generate when lowering accesses of the given type. | ||||
21206 | unsigned | ||||
21207 | ARMTargetLowering::getNumInterleavedAccesses(VectorType *VecTy, | ||||
21208 | const DataLayout &DL) const { | ||||
21209 | return (DL.getTypeSizeInBits(VecTy) + 127) / 128; | ||||
21210 | } | ||||
21211 | |||||
21212 | bool ARMTargetLowering::isLegalInterleavedAccessType( | ||||
21213 | unsigned Factor, FixedVectorType *VecTy, Align Alignment, | ||||
21214 | const DataLayout &DL) const { | ||||
21215 | |||||
21216 | unsigned VecSize = DL.getTypeSizeInBits(VecTy); | ||||
21217 | unsigned ElSize = DL.getTypeSizeInBits(VecTy->getElementType()); | ||||
21218 | |||||
21219 | if (!Subtarget->hasNEON() && !Subtarget->hasMVEIntegerOps()) | ||||
21220 | return false; | ||||
21221 | |||||
21222 | // Ensure the vector doesn't have f16 elements. Even though we could do an | ||||
21223 | // i16 vldN, we can't hold the f16 vectors and will end up converting via | ||||
21224 | // f32. | ||||
21225 | if (Subtarget->hasNEON() && VecTy->getElementType()->isHalfTy()) | ||||
21226 | return false; | ||||
21227 | if (Subtarget->hasMVEIntegerOps() && Factor == 3) | ||||
21228 | return false; | ||||
21229 | |||||
21230 | // Ensure the number of vector elements is greater than 1. | ||||
21231 | if (VecTy->getNumElements() < 2) | ||||
21232 | return false; | ||||
21233 | |||||
21234 | // Ensure the element type is legal. | ||||
21235 | if (ElSize != 8 && ElSize != 16 && ElSize != 32) | ||||
21236 | return false; | ||||
21237 | // And the alignment if high enough under MVE. | ||||
21238 | if (Subtarget->hasMVEIntegerOps() && Alignment < ElSize / 8) | ||||
21239 | return false; | ||||
21240 | |||||
21241 | // Ensure the total vector size is 64 or a multiple of 128. Types larger than | ||||
21242 | // 128 will be split into multiple interleaved accesses. | ||||
21243 | if (Subtarget->hasNEON() && VecSize == 64) | ||||
21244 | return true; | ||||
21245 | return VecSize % 128 == 0; | ||||
21246 | } | ||||
21247 | |||||
21248 | unsigned ARMTargetLowering::getMaxSupportedInterleaveFactor() const { | ||||
21249 | if (Subtarget->hasNEON()) | ||||
21250 | return 4; | ||||
21251 | if (Subtarget->hasMVEIntegerOps()) | ||||
21252 | return MVEMaxSupportedInterleaveFactor; | ||||
21253 | return TargetLoweringBase::getMaxSupportedInterleaveFactor(); | ||||
21254 | } | ||||
21255 | |||||
21256 | /// Lower an interleaved load into a vldN intrinsic. | ||||
21257 | /// | ||||
21258 | /// E.g. Lower an interleaved load (Factor = 2): | ||||
21259 | /// %wide.vec = load <8 x i32>, <8 x i32>* %ptr, align 4 | ||||
21260 | /// %v0 = shuffle %wide.vec, undef, <0, 2, 4, 6> ; Extract even elements | ||||
21261 | /// %v1 = shuffle %wide.vec, undef, <1, 3, 5, 7> ; Extract odd elements | ||||
21262 | /// | ||||
21263 | /// Into: | ||||
21264 | /// %vld2 = { <4 x i32>, <4 x i32> } call llvm.arm.neon.vld2(%ptr, 4) | ||||
21265 | /// %vec0 = extractelement { <4 x i32>, <4 x i32> } %vld2, i32 0 | ||||
21266 | /// %vec1 = extractelement { <4 x i32>, <4 x i32> } %vld2, i32 1 | ||||
21267 | bool ARMTargetLowering::lowerInterleavedLoad( | ||||
21268 | LoadInst *LI, ArrayRef<ShuffleVectorInst *> Shuffles, | ||||
21269 | ArrayRef<unsigned> Indices, unsigned Factor) const { | ||||
21270 | assert(Factor >= 2 && Factor <= getMaxSupportedInterleaveFactor() &&(static_cast <bool> (Factor >= 2 && Factor <= getMaxSupportedInterleaveFactor() && "Invalid interleave factor" ) ? void (0) : __assert_fail ("Factor >= 2 && Factor <= getMaxSupportedInterleaveFactor() && \"Invalid interleave factor\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 21271, __extension__ __PRETTY_FUNCTION__)) | ||||
21271 | "Invalid interleave factor")(static_cast <bool> (Factor >= 2 && Factor <= getMaxSupportedInterleaveFactor() && "Invalid interleave factor" ) ? void (0) : __assert_fail ("Factor >= 2 && Factor <= getMaxSupportedInterleaveFactor() && \"Invalid interleave factor\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 21271, __extension__ __PRETTY_FUNCTION__)); | ||||
21272 | assert(!Shuffles.empty() && "Empty shufflevector input")(static_cast <bool> (!Shuffles.empty() && "Empty shufflevector input" ) ? void (0) : __assert_fail ("!Shuffles.empty() && \"Empty shufflevector input\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 21272, __extension__ __PRETTY_FUNCTION__)); | ||||
21273 | assert(Shuffles.size() == Indices.size() &&(static_cast <bool> (Shuffles.size() == Indices.size() && "Unmatched number of shufflevectors and indices") ? void (0) : __assert_fail ("Shuffles.size() == Indices.size() && \"Unmatched number of shufflevectors and indices\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 21274, __extension__ __PRETTY_FUNCTION__)) | ||||
21274 | "Unmatched number of shufflevectors and indices")(static_cast <bool> (Shuffles.size() == Indices.size() && "Unmatched number of shufflevectors and indices") ? void (0) : __assert_fail ("Shuffles.size() == Indices.size() && \"Unmatched number of shufflevectors and indices\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 21274, __extension__ __PRETTY_FUNCTION__)); | ||||
21275 | |||||
21276 | auto *VecTy = cast<FixedVectorType>(Shuffles[0]->getType()); | ||||
21277 | Type *EltTy = VecTy->getElementType(); | ||||
21278 | |||||
21279 | const DataLayout &DL = LI->getModule()->getDataLayout(); | ||||
21280 | Align Alignment = LI->getAlign(); | ||||
21281 | |||||
21282 | // Skip if we do not have NEON and skip illegal vector types. We can | ||||
21283 | // "legalize" wide vector types into multiple interleaved accesses as long as | ||||
21284 | // the vector types are divisible by 128. | ||||
21285 | if (!isLegalInterleavedAccessType(Factor, VecTy, Alignment, DL)) | ||||
21286 | return false; | ||||
21287 | |||||
21288 | unsigned NumLoads = getNumInterleavedAccesses(VecTy, DL); | ||||
21289 | |||||
21290 | // A pointer vector can not be the return type of the ldN intrinsics. Need to | ||||
21291 | // load integer vectors first and then convert to pointer vectors. | ||||
21292 | if (EltTy->isPointerTy()) | ||||
21293 | VecTy = FixedVectorType::get(DL.getIntPtrType(EltTy), VecTy); | ||||
21294 | |||||
21295 | IRBuilder<> Builder(LI); | ||||
21296 | |||||
21297 | // The base address of the load. | ||||
21298 | Value *BaseAddr = LI->getPointerOperand(); | ||||
21299 | |||||
21300 | if (NumLoads > 1) { | ||||
21301 | // If we're going to generate more than one load, reset the sub-vector type | ||||
21302 | // to something legal. | ||||
21303 | VecTy = FixedVectorType::get(VecTy->getElementType(), | ||||
21304 | VecTy->getNumElements() / NumLoads); | ||||
21305 | |||||
21306 | // We will compute the pointer operand of each load from the original base | ||||
21307 | // address using GEPs. Cast the base address to a pointer to the scalar | ||||
21308 | // element type. | ||||
21309 | BaseAddr = Builder.CreateBitCast( | ||||
21310 | BaseAddr, | ||||
21311 | VecTy->getElementType()->getPointerTo(LI->getPointerAddressSpace())); | ||||
21312 | } | ||||
21313 | |||||
21314 | assert(isTypeLegal(EVT::getEVT(VecTy)) && "Illegal vldN vector type!")(static_cast <bool> (isTypeLegal(EVT::getEVT(VecTy)) && "Illegal vldN vector type!") ? void (0) : __assert_fail ("isTypeLegal(EVT::getEVT(VecTy)) && \"Illegal vldN vector type!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 21314, __extension__ __PRETTY_FUNCTION__)); | ||||
21315 | |||||
21316 | auto createLoadIntrinsic = [&](Value *BaseAddr) { | ||||
21317 | if (Subtarget->hasNEON()) { | ||||
21318 | Type *Int8Ptr = Builder.getInt8PtrTy(LI->getPointerAddressSpace()); | ||||
21319 | Type *Tys[] = {VecTy, Int8Ptr}; | ||||
21320 | static const Intrinsic::ID LoadInts[3] = {Intrinsic::arm_neon_vld2, | ||||
21321 | Intrinsic::arm_neon_vld3, | ||||
21322 | Intrinsic::arm_neon_vld4}; | ||||
21323 | Function *VldnFunc = | ||||
21324 | Intrinsic::getDeclaration(LI->getModule(), LoadInts[Factor - 2], Tys); | ||||
21325 | |||||
21326 | SmallVector<Value *, 2> Ops; | ||||
21327 | Ops.push_back(Builder.CreateBitCast(BaseAddr, Int8Ptr)); | ||||
21328 | Ops.push_back(Builder.getInt32(LI->getAlignment())); | ||||
21329 | |||||
21330 | return Builder.CreateCall(VldnFunc, Ops, "vldN"); | ||||
21331 | } else { | ||||
21332 | assert((Factor == 2 || Factor == 4) &&(static_cast <bool> ((Factor == 2 || Factor == 4) && "expected interleave factor of 2 or 4 for MVE") ? void (0) : __assert_fail ("(Factor == 2 || Factor == 4) && \"expected interleave factor of 2 or 4 for MVE\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 21333, __extension__ __PRETTY_FUNCTION__)) | ||||
21333 | "expected interleave factor of 2 or 4 for MVE")(static_cast <bool> ((Factor == 2 || Factor == 4) && "expected interleave factor of 2 or 4 for MVE") ? void (0) : __assert_fail ("(Factor == 2 || Factor == 4) && \"expected interleave factor of 2 or 4 for MVE\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 21333, __extension__ __PRETTY_FUNCTION__)); | ||||
21334 | Intrinsic::ID LoadInts = | ||||
21335 | Factor == 2 ? Intrinsic::arm_mve_vld2q : Intrinsic::arm_mve_vld4q; | ||||
21336 | Type *VecEltTy = | ||||
21337 | VecTy->getElementType()->getPointerTo(LI->getPointerAddressSpace()); | ||||
21338 | Type *Tys[] = {VecTy, VecEltTy}; | ||||
21339 | Function *VldnFunc = | ||||
21340 | Intrinsic::getDeclaration(LI->getModule(), LoadInts, Tys); | ||||
21341 | |||||
21342 | SmallVector<Value *, 2> Ops; | ||||
21343 | Ops.push_back(Builder.CreateBitCast(BaseAddr, VecEltTy)); | ||||
21344 | return Builder.CreateCall(VldnFunc, Ops, "vldN"); | ||||
21345 | } | ||||
21346 | }; | ||||
21347 | |||||
21348 | // Holds sub-vectors extracted from the load intrinsic return values. The | ||||
21349 | // sub-vectors are associated with the shufflevector instructions they will | ||||
21350 | // replace. | ||||
21351 | DenseMap<ShuffleVectorInst *, SmallVector<Value *, 4>> SubVecs; | ||||
21352 | |||||
21353 | for (unsigned LoadCount = 0; LoadCount < NumLoads; ++LoadCount) { | ||||
21354 | // If we're generating more than one load, compute the base address of | ||||
21355 | // subsequent loads as an offset from the previous. | ||||
21356 | if (LoadCount > 0) | ||||
21357 | BaseAddr = Builder.CreateConstGEP1_32(VecTy->getElementType(), BaseAddr, | ||||
21358 | VecTy->getNumElements() * Factor); | ||||
21359 | |||||
21360 | CallInst *VldN = createLoadIntrinsic(BaseAddr); | ||||
21361 | |||||
21362 | // Replace uses of each shufflevector with the corresponding vector loaded | ||||
21363 | // by ldN. | ||||
21364 | for (unsigned i = 0; i < Shuffles.size(); i++) { | ||||
21365 | ShuffleVectorInst *SV = Shuffles[i]; | ||||
21366 | unsigned Index = Indices[i]; | ||||
21367 | |||||
21368 | Value *SubVec = Builder.CreateExtractValue(VldN, Index); | ||||
21369 | |||||
21370 | // Convert the integer vector to pointer vector if the element is pointer. | ||||
21371 | if (EltTy->isPointerTy()) | ||||
21372 | SubVec = Builder.CreateIntToPtr( | ||||
21373 | SubVec, | ||||
21374 | FixedVectorType::get(SV->getType()->getElementType(), VecTy)); | ||||
21375 | |||||
21376 | SubVecs[SV].push_back(SubVec); | ||||
21377 | } | ||||
21378 | } | ||||
21379 | |||||
21380 | // Replace uses of the shufflevector instructions with the sub-vectors | ||||
21381 | // returned by the load intrinsic. If a shufflevector instruction is | ||||
21382 | // associated with more than one sub-vector, those sub-vectors will be | ||||
21383 | // concatenated into a single wide vector. | ||||
21384 | for (ShuffleVectorInst *SVI : Shuffles) { | ||||
21385 | auto &SubVec = SubVecs[SVI]; | ||||
21386 | auto *WideVec = | ||||
21387 | SubVec.size() > 1 ? concatenateVectors(Builder, SubVec) : SubVec[0]; | ||||
21388 | SVI->replaceAllUsesWith(WideVec); | ||||
21389 | } | ||||
21390 | |||||
21391 | return true; | ||||
21392 | } | ||||
21393 | |||||
21394 | /// Lower an interleaved store into a vstN intrinsic. | ||||
21395 | /// | ||||
21396 | /// E.g. Lower an interleaved store (Factor = 3): | ||||
21397 | /// %i.vec = shuffle <8 x i32> %v0, <8 x i32> %v1, | ||||
21398 | /// <0, 4, 8, 1, 5, 9, 2, 6, 10, 3, 7, 11> | ||||
21399 | /// store <12 x i32> %i.vec, <12 x i32>* %ptr, align 4 | ||||
21400 | /// | ||||
21401 | /// Into: | ||||
21402 | /// %sub.v0 = shuffle <8 x i32> %v0, <8 x i32> v1, <0, 1, 2, 3> | ||||
21403 | /// %sub.v1 = shuffle <8 x i32> %v0, <8 x i32> v1, <4, 5, 6, 7> | ||||
21404 | /// %sub.v2 = shuffle <8 x i32> %v0, <8 x i32> v1, <8, 9, 10, 11> | ||||
21405 | /// call void llvm.arm.neon.vst3(%ptr, %sub.v0, %sub.v1, %sub.v2, 4) | ||||
21406 | /// | ||||
21407 | /// Note that the new shufflevectors will be removed and we'll only generate one | ||||
21408 | /// vst3 instruction in CodeGen. | ||||
21409 | /// | ||||
21410 | /// Example for a more general valid mask (Factor 3). Lower: | ||||
21411 | /// %i.vec = shuffle <32 x i32> %v0, <32 x i32> %v1, | ||||
21412 | /// <4, 32, 16, 5, 33, 17, 6, 34, 18, 7, 35, 19> | ||||
21413 | /// store <12 x i32> %i.vec, <12 x i32>* %ptr | ||||
21414 | /// | ||||
21415 | /// Into: | ||||
21416 | /// %sub.v0 = shuffle <32 x i32> %v0, <32 x i32> v1, <4, 5, 6, 7> | ||||
21417 | /// %sub.v1 = shuffle <32 x i32> %v0, <32 x i32> v1, <32, 33, 34, 35> | ||||
21418 | /// %sub.v2 = shuffle <32 x i32> %v0, <32 x i32> v1, <16, 17, 18, 19> | ||||
21419 | /// call void llvm.arm.neon.vst3(%ptr, %sub.v0, %sub.v1, %sub.v2, 4) | ||||
21420 | bool ARMTargetLowering::lowerInterleavedStore(StoreInst *SI, | ||||
21421 | ShuffleVectorInst *SVI, | ||||
21422 | unsigned Factor) const { | ||||
21423 | assert(Factor >= 2 && Factor <= getMaxSupportedInterleaveFactor() &&(static_cast <bool> (Factor >= 2 && Factor <= getMaxSupportedInterleaveFactor() && "Invalid interleave factor" ) ? void (0) : __assert_fail ("Factor >= 2 && Factor <= getMaxSupportedInterleaveFactor() && \"Invalid interleave factor\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 21424, __extension__ __PRETTY_FUNCTION__)) | ||||
21424 | "Invalid interleave factor")(static_cast <bool> (Factor >= 2 && Factor <= getMaxSupportedInterleaveFactor() && "Invalid interleave factor" ) ? void (0) : __assert_fail ("Factor >= 2 && Factor <= getMaxSupportedInterleaveFactor() && \"Invalid interleave factor\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 21424, __extension__ __PRETTY_FUNCTION__)); | ||||
21425 | |||||
21426 | auto *VecTy = cast<FixedVectorType>(SVI->getType()); | ||||
21427 | assert(VecTy->getNumElements() % Factor == 0 && "Invalid interleaved store")(static_cast <bool> (VecTy->getNumElements() % Factor == 0 && "Invalid interleaved store") ? void (0) : __assert_fail ("VecTy->getNumElements() % Factor == 0 && \"Invalid interleaved store\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 21427, __extension__ __PRETTY_FUNCTION__)); | ||||
21428 | |||||
21429 | unsigned LaneLen = VecTy->getNumElements() / Factor; | ||||
21430 | Type *EltTy = VecTy->getElementType(); | ||||
21431 | auto *SubVecTy = FixedVectorType::get(EltTy, LaneLen); | ||||
21432 | |||||
21433 | const DataLayout &DL = SI->getModule()->getDataLayout(); | ||||
21434 | Align Alignment = SI->getAlign(); | ||||
21435 | |||||
21436 | // Skip if we do not have NEON and skip illegal vector types. We can | ||||
21437 | // "legalize" wide vector types into multiple interleaved accesses as long as | ||||
21438 | // the vector types are divisible by 128. | ||||
21439 | if (!isLegalInterleavedAccessType(Factor, SubVecTy, Alignment, DL)) | ||||
21440 | return false; | ||||
21441 | |||||
21442 | unsigned NumStores = getNumInterleavedAccesses(SubVecTy, DL); | ||||
21443 | |||||
21444 | Value *Op0 = SVI->getOperand(0); | ||||
21445 | Value *Op1 = SVI->getOperand(1); | ||||
21446 | IRBuilder<> Builder(SI); | ||||
21447 | |||||
21448 | // StN intrinsics don't support pointer vectors as arguments. Convert pointer | ||||
21449 | // vectors to integer vectors. | ||||
21450 | if (EltTy->isPointerTy()) { | ||||
21451 | Type *IntTy = DL.getIntPtrType(EltTy); | ||||
21452 | |||||
21453 | // Convert to the corresponding integer vector. | ||||
21454 | auto *IntVecTy = | ||||
21455 | FixedVectorType::get(IntTy, cast<FixedVectorType>(Op0->getType())); | ||||
21456 | Op0 = Builder.CreatePtrToInt(Op0, IntVecTy); | ||||
21457 | Op1 = Builder.CreatePtrToInt(Op1, IntVecTy); | ||||
21458 | |||||
21459 | SubVecTy = FixedVectorType::get(IntTy, LaneLen); | ||||
21460 | } | ||||
21461 | |||||
21462 | // The base address of the store. | ||||
21463 | Value *BaseAddr = SI->getPointerOperand(); | ||||
21464 | |||||
21465 | if (NumStores > 1) { | ||||
21466 | // If we're going to generate more than one store, reset the lane length | ||||
21467 | // and sub-vector type to something legal. | ||||
21468 | LaneLen /= NumStores; | ||||
21469 | SubVecTy = FixedVectorType::get(SubVecTy->getElementType(), LaneLen); | ||||
21470 | |||||
21471 | // We will compute the pointer operand of each store from the original base | ||||
21472 | // address using GEPs. Cast the base address to a pointer to the scalar | ||||
21473 | // element type. | ||||
21474 | BaseAddr = Builder.CreateBitCast( | ||||
21475 | BaseAddr, | ||||
21476 | SubVecTy->getElementType()->getPointerTo(SI->getPointerAddressSpace())); | ||||
21477 | } | ||||
21478 | |||||
21479 | assert(isTypeLegal(EVT::getEVT(SubVecTy)) && "Illegal vstN vector type!")(static_cast <bool> (isTypeLegal(EVT::getEVT(SubVecTy)) && "Illegal vstN vector type!") ? void (0) : __assert_fail ("isTypeLegal(EVT::getEVT(SubVecTy)) && \"Illegal vstN vector type!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 21479, __extension__ __PRETTY_FUNCTION__)); | ||||
21480 | |||||
21481 | auto Mask = SVI->getShuffleMask(); | ||||
21482 | |||||
21483 | auto createStoreIntrinsic = [&](Value *BaseAddr, | ||||
21484 | SmallVectorImpl<Value *> &Shuffles) { | ||||
21485 | if (Subtarget->hasNEON()) { | ||||
21486 | static const Intrinsic::ID StoreInts[3] = {Intrinsic::arm_neon_vst2, | ||||
21487 | Intrinsic::arm_neon_vst3, | ||||
21488 | Intrinsic::arm_neon_vst4}; | ||||
21489 | Type *Int8Ptr = Builder.getInt8PtrTy(SI->getPointerAddressSpace()); | ||||
21490 | Type *Tys[] = {Int8Ptr, SubVecTy}; | ||||
21491 | |||||
21492 | Function *VstNFunc = Intrinsic::getDeclaration( | ||||
21493 | SI->getModule(), StoreInts[Factor - 2], Tys); | ||||
21494 | |||||
21495 | SmallVector<Value *, 6> Ops; | ||||
21496 | Ops.push_back(Builder.CreateBitCast(BaseAddr, Int8Ptr)); | ||||
21497 | append_range(Ops, Shuffles); | ||||
21498 | Ops.push_back(Builder.getInt32(SI->getAlignment())); | ||||
21499 | Builder.CreateCall(VstNFunc, Ops); | ||||
21500 | } else { | ||||
21501 | assert((Factor == 2 || Factor == 4) &&(static_cast <bool> ((Factor == 2 || Factor == 4) && "expected interleave factor of 2 or 4 for MVE") ? void (0) : __assert_fail ("(Factor == 2 || Factor == 4) && \"expected interleave factor of 2 or 4 for MVE\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 21502, __extension__ __PRETTY_FUNCTION__)) | ||||
21502 | "expected interleave factor of 2 or 4 for MVE")(static_cast <bool> ((Factor == 2 || Factor == 4) && "expected interleave factor of 2 or 4 for MVE") ? void (0) : __assert_fail ("(Factor == 2 || Factor == 4) && \"expected interleave factor of 2 or 4 for MVE\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 21502, __extension__ __PRETTY_FUNCTION__)); | ||||
21503 | Intrinsic::ID StoreInts = | ||||
21504 | Factor == 2 ? Intrinsic::arm_mve_vst2q : Intrinsic::arm_mve_vst4q; | ||||
21505 | Type *EltPtrTy = SubVecTy->getElementType()->getPointerTo( | ||||
21506 | SI->getPointerAddressSpace()); | ||||
21507 | Type *Tys[] = {EltPtrTy, SubVecTy}; | ||||
21508 | Function *VstNFunc = | ||||
21509 | Intrinsic::getDeclaration(SI->getModule(), StoreInts, Tys); | ||||
21510 | |||||
21511 | SmallVector<Value *, 6> Ops; | ||||
21512 | Ops.push_back(Builder.CreateBitCast(BaseAddr, EltPtrTy)); | ||||
21513 | append_range(Ops, Shuffles); | ||||
21514 | for (unsigned F = 0; F < Factor; F++) { | ||||
21515 | Ops.push_back(Builder.getInt32(F)); | ||||
21516 | Builder.CreateCall(VstNFunc, Ops); | ||||
21517 | Ops.pop_back(); | ||||
21518 | } | ||||
21519 | } | ||||
21520 | }; | ||||
21521 | |||||
21522 | for (unsigned StoreCount = 0; StoreCount < NumStores; ++StoreCount) { | ||||
21523 | // If we generating more than one store, we compute the base address of | ||||
21524 | // subsequent stores as an offset from the previous. | ||||
21525 | if (StoreCount > 0) | ||||
21526 | BaseAddr = Builder.CreateConstGEP1_32(SubVecTy->getElementType(), | ||||
21527 | BaseAddr, LaneLen * Factor); | ||||
21528 | |||||
21529 | SmallVector<Value *, 4> Shuffles; | ||||
21530 | |||||
21531 | // Split the shufflevector operands into sub vectors for the new vstN call. | ||||
21532 | for (unsigned i = 0; i < Factor; i++) { | ||||
21533 | unsigned IdxI = StoreCount * LaneLen * Factor + i; | ||||
21534 | if (Mask[IdxI] >= 0) { | ||||
21535 | Shuffles.push_back(Builder.CreateShuffleVector( | ||||
21536 | Op0, Op1, createSequentialMask(Mask[IdxI], LaneLen, 0))); | ||||
21537 | } else { | ||||
21538 | unsigned StartMask = 0; | ||||
21539 | for (unsigned j = 1; j < LaneLen; j++) { | ||||
21540 | unsigned IdxJ = StoreCount * LaneLen * Factor + j; | ||||
21541 | if (Mask[IdxJ * Factor + IdxI] >= 0) { | ||||
21542 | StartMask = Mask[IdxJ * Factor + IdxI] - IdxJ; | ||||
21543 | break; | ||||
21544 | } | ||||
21545 | } | ||||
21546 | // Note: If all elements in a chunk are undefs, StartMask=0! | ||||
21547 | // Note: Filling undef gaps with random elements is ok, since | ||||
21548 | // those elements were being written anyway (with undefs). | ||||
21549 | // In the case of all undefs we're defaulting to using elems from 0 | ||||
21550 | // Note: StartMask cannot be negative, it's checked in | ||||
21551 | // isReInterleaveMask | ||||
21552 | Shuffles.push_back(Builder.CreateShuffleVector( | ||||
21553 | Op0, Op1, createSequentialMask(StartMask, LaneLen, 0))); | ||||
21554 | } | ||||
21555 | } | ||||
21556 | |||||
21557 | createStoreIntrinsic(BaseAddr, Shuffles); | ||||
21558 | } | ||||
21559 | return true; | ||||
21560 | } | ||||
21561 | |||||
21562 | enum HABaseType { | ||||
21563 | HA_UNKNOWN = 0, | ||||
21564 | HA_FLOAT, | ||||
21565 | HA_DOUBLE, | ||||
21566 | HA_VECT64, | ||||
21567 | HA_VECT128 | ||||
21568 | }; | ||||
21569 | |||||
21570 | static bool isHomogeneousAggregate(Type *Ty, HABaseType &Base, | ||||
21571 | uint64_t &Members) { | ||||
21572 | if (auto *ST = dyn_cast<StructType>(Ty)) { | ||||
21573 | for (unsigned i = 0; i < ST->getNumElements(); ++i) { | ||||
21574 | uint64_t SubMembers = 0; | ||||
21575 | if (!isHomogeneousAggregate(ST->getElementType(i), Base, SubMembers)) | ||||
21576 | return false; | ||||
21577 | Members += SubMembers; | ||||
21578 | } | ||||
21579 | } else if (auto *AT = dyn_cast<ArrayType>(Ty)) { | ||||
21580 | uint64_t SubMembers = 0; | ||||
21581 | if (!isHomogeneousAggregate(AT->getElementType(), Base, SubMembers)) | ||||
21582 | return false; | ||||
21583 | Members += SubMembers * AT->getNumElements(); | ||||
21584 | } else if (Ty->isFloatTy()) { | ||||
21585 | if (Base != HA_UNKNOWN && Base != HA_FLOAT) | ||||
21586 | return false; | ||||
21587 | Members = 1; | ||||
21588 | Base = HA_FLOAT; | ||||
21589 | } else if (Ty->isDoubleTy()) { | ||||
21590 | if (Base != HA_UNKNOWN && Base != HA_DOUBLE) | ||||
21591 | return false; | ||||
21592 | Members = 1; | ||||
21593 | Base = HA_DOUBLE; | ||||
21594 | } else if (auto *VT = dyn_cast<VectorType>(Ty)) { | ||||
21595 | Members = 1; | ||||
21596 | switch (Base) { | ||||
21597 | case HA_FLOAT: | ||||
21598 | case HA_DOUBLE: | ||||
21599 | return false; | ||||
21600 | case HA_VECT64: | ||||
21601 | return VT->getPrimitiveSizeInBits().getFixedSize() == 64; | ||||
21602 | case HA_VECT128: | ||||
21603 | return VT->getPrimitiveSizeInBits().getFixedSize() == 128; | ||||
21604 | case HA_UNKNOWN: | ||||
21605 | switch (VT->getPrimitiveSizeInBits().getFixedSize()) { | ||||
21606 | case 64: | ||||
21607 | Base = HA_VECT64; | ||||
21608 | return true; | ||||
21609 | case 128: | ||||
21610 | Base = HA_VECT128; | ||||
21611 | return true; | ||||
21612 | default: | ||||
21613 | return false; | ||||
21614 | } | ||||
21615 | } | ||||
21616 | } | ||||
21617 | |||||
21618 | return (Members > 0 && Members <= 4); | ||||
21619 | } | ||||
21620 | |||||
21621 | /// Return the correct alignment for the current calling convention. | ||||
21622 | Align ARMTargetLowering::getABIAlignmentForCallingConv( | ||||
21623 | Type *ArgTy, const DataLayout &DL) const { | ||||
21624 | const Align ABITypeAlign = DL.getABITypeAlign(ArgTy); | ||||
21625 | if (!ArgTy->isVectorTy()) | ||||
21626 | return ABITypeAlign; | ||||
21627 | |||||
21628 | // Avoid over-aligning vector parameters. It would require realigning the | ||||
21629 | // stack and waste space for no real benefit. | ||||
21630 | return std::min(ABITypeAlign, DL.getStackAlignment()); | ||||
21631 | } | ||||
21632 | |||||
21633 | /// Return true if a type is an AAPCS-VFP homogeneous aggregate or one of | ||||
21634 | /// [N x i32] or [N x i64]. This allows front-ends to skip emitting padding when | ||||
21635 | /// passing according to AAPCS rules. | ||||
21636 | bool ARMTargetLowering::functionArgumentNeedsConsecutiveRegisters( | ||||
21637 | Type *Ty, CallingConv::ID CallConv, bool isVarArg, | ||||
21638 | const DataLayout &DL) const { | ||||
21639 | if (getEffectiveCallingConv(CallConv, isVarArg) != | ||||
21640 | CallingConv::ARM_AAPCS_VFP) | ||||
21641 | return false; | ||||
21642 | |||||
21643 | HABaseType Base = HA_UNKNOWN; | ||||
21644 | uint64_t Members = 0; | ||||
21645 | bool IsHA = isHomogeneousAggregate(Ty, Base, Members); | ||||
21646 | LLVM_DEBUG(dbgs() << "isHA: " << IsHA << " "; Ty->dump())do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("arm-isel")) { dbgs() << "isHA: " << IsHA << " "; Ty->dump(); } } while (false); | ||||
21647 | |||||
21648 | bool IsIntArray = Ty->isArrayTy() && Ty->getArrayElementType()->isIntegerTy(); | ||||
21649 | return IsHA || IsIntArray; | ||||
21650 | } | ||||
21651 | |||||
21652 | Register ARMTargetLowering::getExceptionPointerRegister( | ||||
21653 | const Constant *PersonalityFn) const { | ||||
21654 | // Platforms which do not use SjLj EH may return values in these registers | ||||
21655 | // via the personality function. | ||||
21656 | return Subtarget->useSjLjEH() ? Register() : ARM::R0; | ||||
21657 | } | ||||
21658 | |||||
21659 | Register ARMTargetLowering::getExceptionSelectorRegister( | ||||
21660 | const Constant *PersonalityFn) const { | ||||
21661 | // Platforms which do not use SjLj EH may return values in these registers | ||||
21662 | // via the personality function. | ||||
21663 | return Subtarget->useSjLjEH() ? Register() : ARM::R1; | ||||
21664 | } | ||||
21665 | |||||
21666 | void ARMTargetLowering::initializeSplitCSR(MachineBasicBlock *Entry) const { | ||||
21667 | // Update IsSplitCSR in ARMFunctionInfo. | ||||
21668 | ARMFunctionInfo *AFI = Entry->getParent()->getInfo<ARMFunctionInfo>(); | ||||
21669 | AFI->setIsSplitCSR(true); | ||||
21670 | } | ||||
21671 | |||||
21672 | void ARMTargetLowering::insertCopiesSplitCSR( | ||||
21673 | MachineBasicBlock *Entry, | ||||
21674 | const SmallVectorImpl<MachineBasicBlock *> &Exits) const { | ||||
21675 | const ARMBaseRegisterInfo *TRI = Subtarget->getRegisterInfo(); | ||||
21676 | const MCPhysReg *IStart = TRI->getCalleeSavedRegsViaCopy(Entry->getParent()); | ||||
21677 | if (!IStart) | ||||
21678 | return; | ||||
21679 | |||||
21680 | const TargetInstrInfo *TII = Subtarget->getInstrInfo(); | ||||
21681 | MachineRegisterInfo *MRI = &Entry->getParent()->getRegInfo(); | ||||
21682 | MachineBasicBlock::iterator MBBI = Entry->begin(); | ||||
21683 | for (const MCPhysReg *I = IStart; *I; ++I) { | ||||
21684 | const TargetRegisterClass *RC = nullptr; | ||||
21685 | if (ARM::GPRRegClass.contains(*I)) | ||||
21686 | RC = &ARM::GPRRegClass; | ||||
21687 | else if (ARM::DPRRegClass.contains(*I)) | ||||
21688 | RC = &ARM::DPRRegClass; | ||||
21689 | else | ||||
21690 | llvm_unreachable("Unexpected register class in CSRsViaCopy!")::llvm::llvm_unreachable_internal("Unexpected register class in CSRsViaCopy!" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 21690); | ||||
21691 | |||||
21692 | Register NewVR = MRI->createVirtualRegister(RC); | ||||
21693 | // Create copy from CSR to a virtual register. | ||||
21694 | // FIXME: this currently does not emit CFI pseudo-instructions, it works | ||||
21695 | // fine for CXX_FAST_TLS since the C++-style TLS access functions should be | ||||
21696 | // nounwind. If we want to generalize this later, we may need to emit | ||||
21697 | // CFI pseudo-instructions. | ||||
21698 | assert(Entry->getParent()->getFunction().hasFnAttribute((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!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 21700, __extension__ __PRETTY_FUNCTION__)) | ||||
21699 | 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!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 21700, __extension__ __PRETTY_FUNCTION__)) | ||||
21700 | "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!\"" , "llvm/lib/Target/ARM/ARMISelLowering.cpp", 21700, __extension__ __PRETTY_FUNCTION__)); | ||||
21701 | Entry->addLiveIn(*I); | ||||
21702 | BuildMI(*Entry, MBBI, DebugLoc(), TII->get(TargetOpcode::COPY), NewVR) | ||||
21703 | .addReg(*I); | ||||
21704 | |||||
21705 | // Insert the copy-back instructions right before the terminator. | ||||
21706 | for (auto *Exit : Exits) | ||||
21707 | BuildMI(*Exit, Exit->getFirstTerminator(), DebugLoc(), | ||||
21708 | TII->get(TargetOpcode::COPY), *I) | ||||
21709 | .addReg(NewVR); | ||||
21710 | } | ||||
21711 | } | ||||
21712 | |||||
21713 | void ARMTargetLowering::finalizeLowering(MachineFunction &MF) const { | ||||
21714 | MF.getFrameInfo().computeMaxCallFrameSize(MF); | ||||
21715 | TargetLoweringBase::finalizeLowering(MF); | ||||
21716 | } |