File: | lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp |
Warning: | line 7419, column 14 Forming reference to null pointer |
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1 | //===- SelectionDAGBuilder.cpp - Selection-DAG building -------------------===// | |||
2 | // | |||
3 | // The LLVM Compiler Infrastructure | |||
4 | // | |||
5 | // This file is distributed under the University of Illinois Open Source | |||
6 | // License. See LICENSE.TXT for details. | |||
7 | // | |||
8 | //===----------------------------------------------------------------------===// | |||
9 | // | |||
10 | // This implements routines for translating from LLVM IR into SelectionDAG IR. | |||
11 | // | |||
12 | //===----------------------------------------------------------------------===// | |||
13 | ||||
14 | #include "SelectionDAGBuilder.h" | |||
15 | #include "SDNodeDbgValue.h" | |||
16 | #include "llvm/ADT/APFloat.h" | |||
17 | #include "llvm/ADT/APInt.h" | |||
18 | #include "llvm/ADT/ArrayRef.h" | |||
19 | #include "llvm/ADT/BitVector.h" | |||
20 | #include "llvm/ADT/DenseMap.h" | |||
21 | #include "llvm/ADT/None.h" | |||
22 | #include "llvm/ADT/Optional.h" | |||
23 | #include "llvm/ADT/STLExtras.h" | |||
24 | #include "llvm/ADT/SmallPtrSet.h" | |||
25 | #include "llvm/ADT/SmallSet.h" | |||
26 | #include "llvm/ADT/SmallVector.h" | |||
27 | #include "llvm/ADT/StringRef.h" | |||
28 | #include "llvm/ADT/Triple.h" | |||
29 | #include "llvm/ADT/Twine.h" | |||
30 | #include "llvm/Analysis/AliasAnalysis.h" | |||
31 | #include "llvm/Analysis/BranchProbabilityInfo.h" | |||
32 | #include "llvm/Analysis/ConstantFolding.h" | |||
33 | #include "llvm/Analysis/EHPersonalities.h" | |||
34 | #include "llvm/Analysis/Loads.h" | |||
35 | #include "llvm/Analysis/MemoryLocation.h" | |||
36 | #include "llvm/Analysis/TargetLibraryInfo.h" | |||
37 | #include "llvm/Analysis/ValueTracking.h" | |||
38 | #include "llvm/Analysis/VectorUtils.h" | |||
39 | #include "llvm/CodeGen/Analysis.h" | |||
40 | #include "llvm/CodeGen/FunctionLoweringInfo.h" | |||
41 | #include "llvm/CodeGen/GCMetadata.h" | |||
42 | #include "llvm/CodeGen/ISDOpcodes.h" | |||
43 | #include "llvm/CodeGen/MachineBasicBlock.h" | |||
44 | #include "llvm/CodeGen/MachineFrameInfo.h" | |||
45 | #include "llvm/CodeGen/MachineFunction.h" | |||
46 | #include "llvm/CodeGen/MachineInstr.h" | |||
47 | #include "llvm/CodeGen/MachineInstrBuilder.h" | |||
48 | #include "llvm/CodeGen/MachineJumpTableInfo.h" | |||
49 | #include "llvm/CodeGen/MachineMemOperand.h" | |||
50 | #include "llvm/CodeGen/MachineModuleInfo.h" | |||
51 | #include "llvm/CodeGen/MachineOperand.h" | |||
52 | #include "llvm/CodeGen/MachineRegisterInfo.h" | |||
53 | #include "llvm/CodeGen/RuntimeLibcalls.h" | |||
54 | #include "llvm/CodeGen/SelectionDAG.h" | |||
55 | #include "llvm/CodeGen/SelectionDAGNodes.h" | |||
56 | #include "llvm/CodeGen/SelectionDAGTargetInfo.h" | |||
57 | #include "llvm/CodeGen/StackMaps.h" | |||
58 | #include "llvm/CodeGen/TargetFrameLowering.h" | |||
59 | #include "llvm/CodeGen/TargetInstrInfo.h" | |||
60 | #include "llvm/CodeGen/TargetLowering.h" | |||
61 | #include "llvm/CodeGen/TargetOpcodes.h" | |||
62 | #include "llvm/CodeGen/TargetRegisterInfo.h" | |||
63 | #include "llvm/CodeGen/TargetSubtargetInfo.h" | |||
64 | #include "llvm/CodeGen/ValueTypes.h" | |||
65 | #include "llvm/CodeGen/WinEHFuncInfo.h" | |||
66 | #include "llvm/IR/Argument.h" | |||
67 | #include "llvm/IR/Attributes.h" | |||
68 | #include "llvm/IR/BasicBlock.h" | |||
69 | #include "llvm/IR/CFG.h" | |||
70 | #include "llvm/IR/CallSite.h" | |||
71 | #include "llvm/IR/CallingConv.h" | |||
72 | #include "llvm/IR/Constant.h" | |||
73 | #include "llvm/IR/ConstantRange.h" | |||
74 | #include "llvm/IR/Constants.h" | |||
75 | #include "llvm/IR/DataLayout.h" | |||
76 | #include "llvm/IR/DebugInfoMetadata.h" | |||
77 | #include "llvm/IR/DebugLoc.h" | |||
78 | #include "llvm/IR/DerivedTypes.h" | |||
79 | #include "llvm/IR/Function.h" | |||
80 | #include "llvm/IR/GetElementPtrTypeIterator.h" | |||
81 | #include "llvm/IR/InlineAsm.h" | |||
82 | #include "llvm/IR/InstrTypes.h" | |||
83 | #include "llvm/IR/Instruction.h" | |||
84 | #include "llvm/IR/Instructions.h" | |||
85 | #include "llvm/IR/IntrinsicInst.h" | |||
86 | #include "llvm/IR/Intrinsics.h" | |||
87 | #include "llvm/IR/LLVMContext.h" | |||
88 | #include "llvm/IR/Metadata.h" | |||
89 | #include "llvm/IR/Module.h" | |||
90 | #include "llvm/IR/Operator.h" | |||
91 | #include "llvm/IR/PatternMatch.h" | |||
92 | #include "llvm/IR/Statepoint.h" | |||
93 | #include "llvm/IR/Type.h" | |||
94 | #include "llvm/IR/User.h" | |||
95 | #include "llvm/IR/Value.h" | |||
96 | #include "llvm/MC/MCContext.h" | |||
97 | #include "llvm/MC/MCSymbol.h" | |||
98 | #include "llvm/Support/AtomicOrdering.h" | |||
99 | #include "llvm/Support/BranchProbability.h" | |||
100 | #include "llvm/Support/Casting.h" | |||
101 | #include "llvm/Support/CodeGen.h" | |||
102 | #include "llvm/Support/CommandLine.h" | |||
103 | #include "llvm/Support/Compiler.h" | |||
104 | #include "llvm/Support/Debug.h" | |||
105 | #include "llvm/Support/ErrorHandling.h" | |||
106 | #include "llvm/Support/MachineValueType.h" | |||
107 | #include "llvm/Support/MathExtras.h" | |||
108 | #include "llvm/Support/raw_ostream.h" | |||
109 | #include "llvm/Target/TargetIntrinsicInfo.h" | |||
110 | #include "llvm/Target/TargetMachine.h" | |||
111 | #include "llvm/Target/TargetOptions.h" | |||
112 | #include <algorithm> | |||
113 | #include <cassert> | |||
114 | #include <cstddef> | |||
115 | #include <cstdint> | |||
116 | #include <cstring> | |||
117 | #include <iterator> | |||
118 | #include <limits> | |||
119 | #include <numeric> | |||
120 | #include <tuple> | |||
121 | #include <utility> | |||
122 | #include <vector> | |||
123 | ||||
124 | using namespace llvm; | |||
125 | using namespace PatternMatch; | |||
126 | ||||
127 | #define DEBUG_TYPE"isel" "isel" | |||
128 | ||||
129 | /// LimitFloatPrecision - Generate low-precision inline sequences for | |||
130 | /// some float libcalls (6, 8 or 12 bits). | |||
131 | static unsigned LimitFloatPrecision; | |||
132 | ||||
133 | static cl::opt<unsigned, true> | |||
134 | LimitFPPrecision("limit-float-precision", | |||
135 | cl::desc("Generate low-precision inline sequences " | |||
136 | "for some float libcalls"), | |||
137 | cl::location(LimitFloatPrecision), cl::Hidden, | |||
138 | cl::init(0)); | |||
139 | ||||
140 | static cl::opt<unsigned> SwitchPeelThreshold( | |||
141 | "switch-peel-threshold", cl::Hidden, cl::init(66), | |||
142 | cl::desc("Set the case probability threshold for peeling the case from a " | |||
143 | "switch statement. A value greater than 100 will void this " | |||
144 | "optimization")); | |||
145 | ||||
146 | // Limit the width of DAG chains. This is important in general to prevent | |||
147 | // DAG-based analysis from blowing up. For example, alias analysis and | |||
148 | // load clustering may not complete in reasonable time. It is difficult to | |||
149 | // recognize and avoid this situation within each individual analysis, and | |||
150 | // future analyses are likely to have the same behavior. Limiting DAG width is | |||
151 | // the safe approach and will be especially important with global DAGs. | |||
152 | // | |||
153 | // MaxParallelChains default is arbitrarily high to avoid affecting | |||
154 | // optimization, but could be lowered to improve compile time. Any ld-ld-st-st | |||
155 | // sequence over this should have been converted to llvm.memcpy by the | |||
156 | // frontend. It is easy to induce this behavior with .ll code such as: | |||
157 | // %buffer = alloca [4096 x i8] | |||
158 | // %data = load [4096 x i8]* %argPtr | |||
159 | // store [4096 x i8] %data, [4096 x i8]* %buffer | |||
160 | static const unsigned MaxParallelChains = 64; | |||
161 | ||||
162 | // Return the calling convention if the Value passed requires ABI mangling as it | |||
163 | // is a parameter to a function or a return value from a function which is not | |||
164 | // an intrinsic. | |||
165 | static Optional<CallingConv::ID> getABIRegCopyCC(const Value *V) { | |||
166 | if (auto *R = dyn_cast<ReturnInst>(V)) | |||
167 | return R->getParent()->getParent()->getCallingConv(); | |||
168 | ||||
169 | if (auto *CI = dyn_cast<CallInst>(V)) { | |||
170 | const bool IsInlineAsm = CI->isInlineAsm(); | |||
171 | const bool IsIndirectFunctionCall = | |||
172 | !IsInlineAsm && !CI->getCalledFunction(); | |||
173 | ||||
174 | // It is possible that the call instruction is an inline asm statement or an | |||
175 | // indirect function call in which case the return value of | |||
176 | // getCalledFunction() would be nullptr. | |||
177 | const bool IsInstrinsicCall = | |||
178 | !IsInlineAsm && !IsIndirectFunctionCall && | |||
179 | CI->getCalledFunction()->getIntrinsicID() != Intrinsic::not_intrinsic; | |||
180 | ||||
181 | if (!IsInlineAsm && !IsInstrinsicCall) | |||
182 | return CI->getCallingConv(); | |||
183 | } | |||
184 | ||||
185 | return None; | |||
186 | } | |||
187 | ||||
188 | static SDValue getCopyFromPartsVector(SelectionDAG &DAG, const SDLoc &DL, | |||
189 | const SDValue *Parts, unsigned NumParts, | |||
190 | MVT PartVT, EVT ValueVT, const Value *V, | |||
191 | Optional<CallingConv::ID> CC); | |||
192 | ||||
193 | /// getCopyFromParts - Create a value that contains the specified legal parts | |||
194 | /// combined into the value they represent. If the parts combine to a type | |||
195 | /// larger than ValueVT then AssertOp can be used to specify whether the extra | |||
196 | /// bits are known to be zero (ISD::AssertZext) or sign extended from ValueVT | |||
197 | /// (ISD::AssertSext). | |||
198 | static SDValue getCopyFromParts(SelectionDAG &DAG, const SDLoc &DL, | |||
199 | const SDValue *Parts, unsigned NumParts, | |||
200 | MVT PartVT, EVT ValueVT, const Value *V, | |||
201 | Optional<CallingConv::ID> CC = None, | |||
202 | Optional<ISD::NodeType> AssertOp = None) { | |||
203 | if (ValueVT.isVector()) | |||
204 | return getCopyFromPartsVector(DAG, DL, Parts, NumParts, PartVT, ValueVT, V, | |||
205 | CC); | |||
206 | ||||
207 | assert(NumParts > 0 && "No parts to assemble!")((NumParts > 0 && "No parts to assemble!") ? static_cast <void> (0) : __assert_fail ("NumParts > 0 && \"No parts to assemble!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 207, __PRETTY_FUNCTION__)); | |||
208 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
209 | SDValue Val = Parts[0]; | |||
210 | ||||
211 | if (NumParts > 1) { | |||
212 | // Assemble the value from multiple parts. | |||
213 | if (ValueVT.isInteger()) { | |||
214 | unsigned PartBits = PartVT.getSizeInBits(); | |||
215 | unsigned ValueBits = ValueVT.getSizeInBits(); | |||
216 | ||||
217 | // Assemble the power of 2 part. | |||
218 | unsigned RoundParts = NumParts & (NumParts - 1) ? | |||
219 | 1 << Log2_32(NumParts) : NumParts; | |||
220 | unsigned RoundBits = PartBits * RoundParts; | |||
221 | EVT RoundVT = RoundBits == ValueBits ? | |||
222 | ValueVT : EVT::getIntegerVT(*DAG.getContext(), RoundBits); | |||
223 | SDValue Lo, Hi; | |||
224 | ||||
225 | EVT HalfVT = EVT::getIntegerVT(*DAG.getContext(), RoundBits/2); | |||
226 | ||||
227 | if (RoundParts > 2) { | |||
228 | Lo = getCopyFromParts(DAG, DL, Parts, RoundParts / 2, | |||
229 | PartVT, HalfVT, V); | |||
230 | Hi = getCopyFromParts(DAG, DL, Parts + RoundParts / 2, | |||
231 | RoundParts / 2, PartVT, HalfVT, V); | |||
232 | } else { | |||
233 | Lo = DAG.getNode(ISD::BITCAST, DL, HalfVT, Parts[0]); | |||
234 | Hi = DAG.getNode(ISD::BITCAST, DL, HalfVT, Parts[1]); | |||
235 | } | |||
236 | ||||
237 | if (DAG.getDataLayout().isBigEndian()) | |||
238 | std::swap(Lo, Hi); | |||
239 | ||||
240 | Val = DAG.getNode(ISD::BUILD_PAIR, DL, RoundVT, Lo, Hi); | |||
241 | ||||
242 | if (RoundParts < NumParts) { | |||
243 | // Assemble the trailing non-power-of-2 part. | |||
244 | unsigned OddParts = NumParts - RoundParts; | |||
245 | EVT OddVT = EVT::getIntegerVT(*DAG.getContext(), OddParts * PartBits); | |||
246 | Hi = getCopyFromParts(DAG, DL, Parts + RoundParts, OddParts, PartVT, | |||
247 | OddVT, V, CC); | |||
248 | ||||
249 | // Combine the round and odd parts. | |||
250 | Lo = Val; | |||
251 | if (DAG.getDataLayout().isBigEndian()) | |||
252 | std::swap(Lo, Hi); | |||
253 | EVT TotalVT = EVT::getIntegerVT(*DAG.getContext(), NumParts * PartBits); | |||
254 | Hi = DAG.getNode(ISD::ANY_EXTEND, DL, TotalVT, Hi); | |||
255 | Hi = | |||
256 | DAG.getNode(ISD::SHL, DL, TotalVT, Hi, | |||
257 | DAG.getConstant(Lo.getValueSizeInBits(), DL, | |||
258 | TLI.getPointerTy(DAG.getDataLayout()))); | |||
259 | Lo = DAG.getNode(ISD::ZERO_EXTEND, DL, TotalVT, Lo); | |||
260 | Val = DAG.getNode(ISD::OR, DL, TotalVT, Lo, Hi); | |||
261 | } | |||
262 | } else if (PartVT.isFloatingPoint()) { | |||
263 | // FP split into multiple FP parts (for ppcf128) | |||
264 | assert(ValueVT == EVT(MVT::ppcf128) && PartVT == MVT::f64 &&((ValueVT == EVT(MVT::ppcf128) && PartVT == MVT::f64 && "Unexpected split") ? static_cast<void> (0) : __assert_fail ("ValueVT == EVT(MVT::ppcf128) && PartVT == MVT::f64 && \"Unexpected split\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 265, __PRETTY_FUNCTION__)) | |||
265 | "Unexpected split")((ValueVT == EVT(MVT::ppcf128) && PartVT == MVT::f64 && "Unexpected split") ? static_cast<void> (0) : __assert_fail ("ValueVT == EVT(MVT::ppcf128) && PartVT == MVT::f64 && \"Unexpected split\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 265, __PRETTY_FUNCTION__)); | |||
266 | SDValue Lo, Hi; | |||
267 | Lo = DAG.getNode(ISD::BITCAST, DL, EVT(MVT::f64), Parts[0]); | |||
268 | Hi = DAG.getNode(ISD::BITCAST, DL, EVT(MVT::f64), Parts[1]); | |||
269 | if (TLI.hasBigEndianPartOrdering(ValueVT, DAG.getDataLayout())) | |||
270 | std::swap(Lo, Hi); | |||
271 | Val = DAG.getNode(ISD::BUILD_PAIR, DL, ValueVT, Lo, Hi); | |||
272 | } else { | |||
273 | // FP split into integer parts (soft fp) | |||
274 | assert(ValueVT.isFloatingPoint() && PartVT.isInteger() &&((ValueVT.isFloatingPoint() && PartVT.isInteger() && !PartVT.isVector() && "Unexpected split") ? static_cast <void> (0) : __assert_fail ("ValueVT.isFloatingPoint() && PartVT.isInteger() && !PartVT.isVector() && \"Unexpected split\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 275, __PRETTY_FUNCTION__)) | |||
275 | !PartVT.isVector() && "Unexpected split")((ValueVT.isFloatingPoint() && PartVT.isInteger() && !PartVT.isVector() && "Unexpected split") ? static_cast <void> (0) : __assert_fail ("ValueVT.isFloatingPoint() && PartVT.isInteger() && !PartVT.isVector() && \"Unexpected split\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 275, __PRETTY_FUNCTION__)); | |||
276 | EVT IntVT = EVT::getIntegerVT(*DAG.getContext(), ValueVT.getSizeInBits()); | |||
277 | Val = getCopyFromParts(DAG, DL, Parts, NumParts, PartVT, IntVT, V, CC); | |||
278 | } | |||
279 | } | |||
280 | ||||
281 | // There is now one part, held in Val. Correct it to match ValueVT. | |||
282 | // PartEVT is the type of the register class that holds the value. | |||
283 | // ValueVT is the type of the inline asm operation. | |||
284 | EVT PartEVT = Val.getValueType(); | |||
285 | ||||
286 | if (PartEVT == ValueVT) | |||
287 | return Val; | |||
288 | ||||
289 | if (PartEVT.isInteger() && ValueVT.isFloatingPoint() && | |||
290 | ValueVT.bitsLT(PartEVT)) { | |||
291 | // For an FP value in an integer part, we need to truncate to the right | |||
292 | // width first. | |||
293 | PartEVT = EVT::getIntegerVT(*DAG.getContext(), ValueVT.getSizeInBits()); | |||
294 | Val = DAG.getNode(ISD::TRUNCATE, DL, PartEVT, Val); | |||
295 | } | |||
296 | ||||
297 | // Handle types that have the same size. | |||
298 | if (PartEVT.getSizeInBits() == ValueVT.getSizeInBits()) | |||
299 | return DAG.getNode(ISD::BITCAST, DL, ValueVT, Val); | |||
300 | ||||
301 | // Handle types with different sizes. | |||
302 | if (PartEVT.isInteger() && ValueVT.isInteger()) { | |||
303 | if (ValueVT.bitsLT(PartEVT)) { | |||
304 | // For a truncate, see if we have any information to | |||
305 | // indicate whether the truncated bits will always be | |||
306 | // zero or sign-extension. | |||
307 | if (AssertOp.hasValue()) | |||
308 | Val = DAG.getNode(*AssertOp, DL, PartEVT, Val, | |||
309 | DAG.getValueType(ValueVT)); | |||
310 | return DAG.getNode(ISD::TRUNCATE, DL, ValueVT, Val); | |||
311 | } | |||
312 | return DAG.getNode(ISD::ANY_EXTEND, DL, ValueVT, Val); | |||
313 | } | |||
314 | ||||
315 | if (PartEVT.isFloatingPoint() && ValueVT.isFloatingPoint()) { | |||
316 | // FP_ROUND's are always exact here. | |||
317 | if (ValueVT.bitsLT(Val.getValueType())) | |||
318 | return DAG.getNode( | |||
319 | ISD::FP_ROUND, DL, ValueVT, Val, | |||
320 | DAG.getTargetConstant(1, DL, TLI.getPointerTy(DAG.getDataLayout()))); | |||
321 | ||||
322 | return DAG.getNode(ISD::FP_EXTEND, DL, ValueVT, Val); | |||
323 | } | |||
324 | ||||
325 | llvm_unreachable("Unknown mismatch!")::llvm::llvm_unreachable_internal("Unknown mismatch!", "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 325); | |||
326 | } | |||
327 | ||||
328 | static void diagnosePossiblyInvalidConstraint(LLVMContext &Ctx, const Value *V, | |||
329 | const Twine &ErrMsg) { | |||
330 | const Instruction *I = dyn_cast_or_null<Instruction>(V); | |||
331 | if (!V) | |||
332 | return Ctx.emitError(ErrMsg); | |||
333 | ||||
334 | const char *AsmError = ", possible invalid constraint for vector type"; | |||
335 | if (const CallInst *CI = dyn_cast<CallInst>(I)) | |||
336 | if (isa<InlineAsm>(CI->getCalledValue())) | |||
337 | return Ctx.emitError(I, ErrMsg + AsmError); | |||
338 | ||||
339 | return Ctx.emitError(I, ErrMsg); | |||
340 | } | |||
341 | ||||
342 | /// getCopyFromPartsVector - Create a value that contains the specified legal | |||
343 | /// parts combined into the value they represent. If the parts combine to a | |||
344 | /// type larger than ValueVT then AssertOp can be used to specify whether the | |||
345 | /// extra bits are known to be zero (ISD::AssertZext) or sign extended from | |||
346 | /// ValueVT (ISD::AssertSext). | |||
347 | static SDValue getCopyFromPartsVector(SelectionDAG &DAG, const SDLoc &DL, | |||
348 | const SDValue *Parts, unsigned NumParts, | |||
349 | MVT PartVT, EVT ValueVT, const Value *V, | |||
350 | Optional<CallingConv::ID> CallConv) { | |||
351 | assert(ValueVT.isVector() && "Not a vector value")((ValueVT.isVector() && "Not a vector value") ? static_cast <void> (0) : __assert_fail ("ValueVT.isVector() && \"Not a vector value\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 351, __PRETTY_FUNCTION__)); | |||
352 | assert(NumParts > 0 && "No parts to assemble!")((NumParts > 0 && "No parts to assemble!") ? static_cast <void> (0) : __assert_fail ("NumParts > 0 && \"No parts to assemble!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 352, __PRETTY_FUNCTION__)); | |||
353 | const bool IsABIRegCopy = CallConv.hasValue(); | |||
354 | ||||
355 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
356 | SDValue Val = Parts[0]; | |||
357 | ||||
358 | // Handle a multi-element vector. | |||
359 | if (NumParts > 1) { | |||
360 | EVT IntermediateVT; | |||
361 | MVT RegisterVT; | |||
362 | unsigned NumIntermediates; | |||
363 | unsigned NumRegs; | |||
364 | ||||
365 | if (IsABIRegCopy) { | |||
366 | NumRegs = TLI.getVectorTypeBreakdownForCallingConv( | |||
367 | *DAG.getContext(), CallConv.getValue(), ValueVT, IntermediateVT, | |||
368 | NumIntermediates, RegisterVT); | |||
369 | } else { | |||
370 | NumRegs = | |||
371 | TLI.getVectorTypeBreakdown(*DAG.getContext(), ValueVT, IntermediateVT, | |||
372 | NumIntermediates, RegisterVT); | |||
373 | } | |||
374 | ||||
375 | assert(NumRegs == NumParts && "Part count doesn't match vector breakdown!")((NumRegs == NumParts && "Part count doesn't match vector breakdown!" ) ? static_cast<void> (0) : __assert_fail ("NumRegs == NumParts && \"Part count doesn't match vector breakdown!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 375, __PRETTY_FUNCTION__)); | |||
376 | NumParts = NumRegs; // Silence a compiler warning. | |||
377 | assert(RegisterVT == PartVT && "Part type doesn't match vector breakdown!")((RegisterVT == PartVT && "Part type doesn't match vector breakdown!" ) ? static_cast<void> (0) : __assert_fail ("RegisterVT == PartVT && \"Part type doesn't match vector breakdown!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 377, __PRETTY_FUNCTION__)); | |||
378 | assert(RegisterVT.getSizeInBits() ==((RegisterVT.getSizeInBits() == Parts[0].getSimpleValueType() .getSizeInBits() && "Part type sizes don't match!") ? static_cast<void> (0) : __assert_fail ("RegisterVT.getSizeInBits() == Parts[0].getSimpleValueType().getSizeInBits() && \"Part type sizes don't match!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 380, __PRETTY_FUNCTION__)) | |||
379 | Parts[0].getSimpleValueType().getSizeInBits() &&((RegisterVT.getSizeInBits() == Parts[0].getSimpleValueType() .getSizeInBits() && "Part type sizes don't match!") ? static_cast<void> (0) : __assert_fail ("RegisterVT.getSizeInBits() == Parts[0].getSimpleValueType().getSizeInBits() && \"Part type sizes don't match!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 380, __PRETTY_FUNCTION__)) | |||
380 | "Part type sizes don't match!")((RegisterVT.getSizeInBits() == Parts[0].getSimpleValueType() .getSizeInBits() && "Part type sizes don't match!") ? static_cast<void> (0) : __assert_fail ("RegisterVT.getSizeInBits() == Parts[0].getSimpleValueType().getSizeInBits() && \"Part type sizes don't match!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 380, __PRETTY_FUNCTION__)); | |||
381 | ||||
382 | // Assemble the parts into intermediate operands. | |||
383 | SmallVector<SDValue, 8> Ops(NumIntermediates); | |||
384 | if (NumIntermediates == NumParts) { | |||
385 | // If the register was not expanded, truncate or copy the value, | |||
386 | // as appropriate. | |||
387 | for (unsigned i = 0; i != NumParts; ++i) | |||
388 | Ops[i] = getCopyFromParts(DAG, DL, &Parts[i], 1, | |||
389 | PartVT, IntermediateVT, V); | |||
390 | } else if (NumParts > 0) { | |||
391 | // If the intermediate type was expanded, build the intermediate | |||
392 | // operands from the parts. | |||
393 | assert(NumParts % NumIntermediates == 0 &&((NumParts % NumIntermediates == 0 && "Must expand into a divisible number of parts!" ) ? static_cast<void> (0) : __assert_fail ("NumParts % NumIntermediates == 0 && \"Must expand into a divisible number of parts!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 394, __PRETTY_FUNCTION__)) | |||
394 | "Must expand into a divisible number of parts!")((NumParts % NumIntermediates == 0 && "Must expand into a divisible number of parts!" ) ? static_cast<void> (0) : __assert_fail ("NumParts % NumIntermediates == 0 && \"Must expand into a divisible number of parts!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 394, __PRETTY_FUNCTION__)); | |||
395 | unsigned Factor = NumParts / NumIntermediates; | |||
396 | for (unsigned i = 0; i != NumIntermediates; ++i) | |||
397 | Ops[i] = getCopyFromParts(DAG, DL, &Parts[i * Factor], Factor, | |||
398 | PartVT, IntermediateVT, V); | |||
399 | } | |||
400 | ||||
401 | // Build a vector with BUILD_VECTOR or CONCAT_VECTORS from the | |||
402 | // intermediate operands. | |||
403 | EVT BuiltVectorTy = | |||
404 | EVT::getVectorVT(*DAG.getContext(), IntermediateVT.getScalarType(), | |||
405 | (IntermediateVT.isVector() | |||
406 | ? IntermediateVT.getVectorNumElements() * NumParts | |||
407 | : NumIntermediates)); | |||
408 | Val = DAG.getNode(IntermediateVT.isVector() ? ISD::CONCAT_VECTORS | |||
409 | : ISD::BUILD_VECTOR, | |||
410 | DL, BuiltVectorTy, Ops); | |||
411 | } | |||
412 | ||||
413 | // There is now one part, held in Val. Correct it to match ValueVT. | |||
414 | EVT PartEVT = Val.getValueType(); | |||
415 | ||||
416 | if (PartEVT == ValueVT) | |||
417 | return Val; | |||
418 | ||||
419 | if (PartEVT.isVector()) { | |||
420 | // If the element type of the source/dest vectors are the same, but the | |||
421 | // parts vector has more elements than the value vector, then we have a | |||
422 | // vector widening case (e.g. <2 x float> -> <4 x float>). Extract the | |||
423 | // elements we want. | |||
424 | if (PartEVT.getVectorElementType() == ValueVT.getVectorElementType()) { | |||
425 | assert(PartEVT.getVectorNumElements() > ValueVT.getVectorNumElements() &&((PartEVT.getVectorNumElements() > ValueVT.getVectorNumElements () && "Cannot narrow, it would be a lossy transformation" ) ? static_cast<void> (0) : __assert_fail ("PartEVT.getVectorNumElements() > ValueVT.getVectorNumElements() && \"Cannot narrow, it would be a lossy transformation\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 426, __PRETTY_FUNCTION__)) | |||
426 | "Cannot narrow, it would be a lossy transformation")((PartEVT.getVectorNumElements() > ValueVT.getVectorNumElements () && "Cannot narrow, it would be a lossy transformation" ) ? static_cast<void> (0) : __assert_fail ("PartEVT.getVectorNumElements() > ValueVT.getVectorNumElements() && \"Cannot narrow, it would be a lossy transformation\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 426, __PRETTY_FUNCTION__)); | |||
427 | return DAG.getNode( | |||
428 | ISD::EXTRACT_SUBVECTOR, DL, ValueVT, Val, | |||
429 | DAG.getConstant(0, DL, TLI.getVectorIdxTy(DAG.getDataLayout()))); | |||
430 | } | |||
431 | ||||
432 | // Vector/Vector bitcast. | |||
433 | if (ValueVT.getSizeInBits() == PartEVT.getSizeInBits()) | |||
434 | return DAG.getNode(ISD::BITCAST, DL, ValueVT, Val); | |||
435 | ||||
436 | assert(PartEVT.getVectorNumElements() == ValueVT.getVectorNumElements() &&((PartEVT.getVectorNumElements() == ValueVT.getVectorNumElements () && "Cannot handle this kind of promotion") ? static_cast <void> (0) : __assert_fail ("PartEVT.getVectorNumElements() == ValueVT.getVectorNumElements() && \"Cannot handle this kind of promotion\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 437, __PRETTY_FUNCTION__)) | |||
437 | "Cannot handle this kind of promotion")((PartEVT.getVectorNumElements() == ValueVT.getVectorNumElements () && "Cannot handle this kind of promotion") ? static_cast <void> (0) : __assert_fail ("PartEVT.getVectorNumElements() == ValueVT.getVectorNumElements() && \"Cannot handle this kind of promotion\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 437, __PRETTY_FUNCTION__)); | |||
438 | // Promoted vector extract | |||
439 | return DAG.getAnyExtOrTrunc(Val, DL, ValueVT); | |||
440 | ||||
441 | } | |||
442 | ||||
443 | // Trivial bitcast if the types are the same size and the destination | |||
444 | // vector type is legal. | |||
445 | if (PartEVT.getSizeInBits() == ValueVT.getSizeInBits() && | |||
446 | TLI.isTypeLegal(ValueVT)) | |||
447 | return DAG.getNode(ISD::BITCAST, DL, ValueVT, Val); | |||
448 | ||||
449 | if (ValueVT.getVectorNumElements() != 1) { | |||
450 | // Certain ABIs require that vectors are passed as integers. For vectors | |||
451 | // are the same size, this is an obvious bitcast. | |||
452 | if (ValueVT.getSizeInBits() == PartEVT.getSizeInBits()) { | |||
453 | return DAG.getNode(ISD::BITCAST, DL, ValueVT, Val); | |||
454 | } else if (ValueVT.getSizeInBits() < PartEVT.getSizeInBits()) { | |||
455 | // Bitcast Val back the original type and extract the corresponding | |||
456 | // vector we want. | |||
457 | unsigned Elts = PartEVT.getSizeInBits() / ValueVT.getScalarSizeInBits(); | |||
458 | EVT WiderVecType = EVT::getVectorVT(*DAG.getContext(), | |||
459 | ValueVT.getVectorElementType(), Elts); | |||
460 | Val = DAG.getBitcast(WiderVecType, Val); | |||
461 | return DAG.getNode( | |||
462 | ISD::EXTRACT_SUBVECTOR, DL, ValueVT, Val, | |||
463 | DAG.getConstant(0, DL, TLI.getVectorIdxTy(DAG.getDataLayout()))); | |||
464 | } | |||
465 | ||||
466 | diagnosePossiblyInvalidConstraint( | |||
467 | *DAG.getContext(), V, "non-trivial scalar-to-vector conversion"); | |||
468 | return DAG.getUNDEF(ValueVT); | |||
469 | } | |||
470 | ||||
471 | // Handle cases such as i8 -> <1 x i1> | |||
472 | EVT ValueSVT = ValueVT.getVectorElementType(); | |||
473 | if (ValueVT.getVectorNumElements() == 1 && ValueSVT != PartEVT) | |||
474 | Val = ValueVT.isFloatingPoint() ? DAG.getFPExtendOrRound(Val, DL, ValueSVT) | |||
475 | : DAG.getAnyExtOrTrunc(Val, DL, ValueSVT); | |||
476 | ||||
477 | return DAG.getBuildVector(ValueVT, DL, Val); | |||
478 | } | |||
479 | ||||
480 | static void getCopyToPartsVector(SelectionDAG &DAG, const SDLoc &dl, | |||
481 | SDValue Val, SDValue *Parts, unsigned NumParts, | |||
482 | MVT PartVT, const Value *V, | |||
483 | Optional<CallingConv::ID> CallConv); | |||
484 | ||||
485 | /// getCopyToParts - Create a series of nodes that contain the specified value | |||
486 | /// split into legal parts. If the parts contain more bits than Val, then, for | |||
487 | /// integers, ExtendKind can be used to specify how to generate the extra bits. | |||
488 | static void getCopyToParts(SelectionDAG &DAG, const SDLoc &DL, SDValue Val, | |||
489 | SDValue *Parts, unsigned NumParts, MVT PartVT, | |||
490 | const Value *V, | |||
491 | Optional<CallingConv::ID> CallConv = None, | |||
492 | ISD::NodeType ExtendKind = ISD::ANY_EXTEND) { | |||
493 | EVT ValueVT = Val.getValueType(); | |||
494 | ||||
495 | // Handle the vector case separately. | |||
496 | if (ValueVT.isVector()) | |||
497 | return getCopyToPartsVector(DAG, DL, Val, Parts, NumParts, PartVT, V, | |||
498 | CallConv); | |||
499 | ||||
500 | unsigned PartBits = PartVT.getSizeInBits(); | |||
501 | unsigned OrigNumParts = NumParts; | |||
502 | assert(DAG.getTargetLoweringInfo().isTypeLegal(PartVT) &&((DAG.getTargetLoweringInfo().isTypeLegal(PartVT) && "Copying to an illegal type!" ) ? static_cast<void> (0) : __assert_fail ("DAG.getTargetLoweringInfo().isTypeLegal(PartVT) && \"Copying to an illegal type!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 503, __PRETTY_FUNCTION__)) | |||
503 | "Copying to an illegal type!")((DAG.getTargetLoweringInfo().isTypeLegal(PartVT) && "Copying to an illegal type!" ) ? static_cast<void> (0) : __assert_fail ("DAG.getTargetLoweringInfo().isTypeLegal(PartVT) && \"Copying to an illegal type!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 503, __PRETTY_FUNCTION__)); | |||
504 | ||||
505 | if (NumParts == 0) | |||
506 | return; | |||
507 | ||||
508 | assert(!ValueVT.isVector() && "Vector case handled elsewhere")((!ValueVT.isVector() && "Vector case handled elsewhere" ) ? static_cast<void> (0) : __assert_fail ("!ValueVT.isVector() && \"Vector case handled elsewhere\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 508, __PRETTY_FUNCTION__)); | |||
509 | EVT PartEVT = PartVT; | |||
510 | if (PartEVT == ValueVT) { | |||
511 | assert(NumParts == 1 && "No-op copy with multiple parts!")((NumParts == 1 && "No-op copy with multiple parts!") ? static_cast<void> (0) : __assert_fail ("NumParts == 1 && \"No-op copy with multiple parts!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 511, __PRETTY_FUNCTION__)); | |||
512 | Parts[0] = Val; | |||
513 | return; | |||
514 | } | |||
515 | ||||
516 | if (NumParts * PartBits > ValueVT.getSizeInBits()) { | |||
517 | // If the parts cover more bits than the value has, promote the value. | |||
518 | if (PartVT.isFloatingPoint() && ValueVT.isFloatingPoint()) { | |||
519 | assert(NumParts == 1 && "Do not know what to promote to!")((NumParts == 1 && "Do not know what to promote to!") ? static_cast<void> (0) : __assert_fail ("NumParts == 1 && \"Do not know what to promote to!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 519, __PRETTY_FUNCTION__)); | |||
520 | Val = DAG.getNode(ISD::FP_EXTEND, DL, PartVT, Val); | |||
521 | } else { | |||
522 | if (ValueVT.isFloatingPoint()) { | |||
523 | // FP values need to be bitcast, then extended if they are being put | |||
524 | // into a larger container. | |||
525 | ValueVT = EVT::getIntegerVT(*DAG.getContext(), ValueVT.getSizeInBits()); | |||
526 | Val = DAG.getNode(ISD::BITCAST, DL, ValueVT, Val); | |||
527 | } | |||
528 | assert((PartVT.isInteger() || PartVT == MVT::x86mmx) &&(((PartVT.isInteger() || PartVT == MVT::x86mmx) && ValueVT .isInteger() && "Unknown mismatch!") ? static_cast< void> (0) : __assert_fail ("(PartVT.isInteger() || PartVT == MVT::x86mmx) && ValueVT.isInteger() && \"Unknown mismatch!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 530, __PRETTY_FUNCTION__)) | |||
529 | ValueVT.isInteger() &&(((PartVT.isInteger() || PartVT == MVT::x86mmx) && ValueVT .isInteger() && "Unknown mismatch!") ? static_cast< void> (0) : __assert_fail ("(PartVT.isInteger() || PartVT == MVT::x86mmx) && ValueVT.isInteger() && \"Unknown mismatch!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 530, __PRETTY_FUNCTION__)) | |||
530 | "Unknown mismatch!")(((PartVT.isInteger() || PartVT == MVT::x86mmx) && ValueVT .isInteger() && "Unknown mismatch!") ? static_cast< void> (0) : __assert_fail ("(PartVT.isInteger() || PartVT == MVT::x86mmx) && ValueVT.isInteger() && \"Unknown mismatch!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 530, __PRETTY_FUNCTION__)); | |||
531 | ValueVT = EVT::getIntegerVT(*DAG.getContext(), NumParts * PartBits); | |||
532 | Val = DAG.getNode(ExtendKind, DL, ValueVT, Val); | |||
533 | if (PartVT == MVT::x86mmx) | |||
534 | Val = DAG.getNode(ISD::BITCAST, DL, PartVT, Val); | |||
535 | } | |||
536 | } else if (PartBits == ValueVT.getSizeInBits()) { | |||
537 | // Different types of the same size. | |||
538 | assert(NumParts == 1 && PartEVT != ValueVT)((NumParts == 1 && PartEVT != ValueVT) ? static_cast< void> (0) : __assert_fail ("NumParts == 1 && PartEVT != ValueVT" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 538, __PRETTY_FUNCTION__)); | |||
539 | Val = DAG.getNode(ISD::BITCAST, DL, PartVT, Val); | |||
540 | } else if (NumParts * PartBits < ValueVT.getSizeInBits()) { | |||
541 | // If the parts cover less bits than value has, truncate the value. | |||
542 | assert((PartVT.isInteger() || PartVT == MVT::x86mmx) &&(((PartVT.isInteger() || PartVT == MVT::x86mmx) && ValueVT .isInteger() && "Unknown mismatch!") ? static_cast< void> (0) : __assert_fail ("(PartVT.isInteger() || PartVT == MVT::x86mmx) && ValueVT.isInteger() && \"Unknown mismatch!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 544, __PRETTY_FUNCTION__)) | |||
543 | ValueVT.isInteger() &&(((PartVT.isInteger() || PartVT == MVT::x86mmx) && ValueVT .isInteger() && "Unknown mismatch!") ? static_cast< void> (0) : __assert_fail ("(PartVT.isInteger() || PartVT == MVT::x86mmx) && ValueVT.isInteger() && \"Unknown mismatch!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 544, __PRETTY_FUNCTION__)) | |||
544 | "Unknown mismatch!")(((PartVT.isInteger() || PartVT == MVT::x86mmx) && ValueVT .isInteger() && "Unknown mismatch!") ? static_cast< void> (0) : __assert_fail ("(PartVT.isInteger() || PartVT == MVT::x86mmx) && ValueVT.isInteger() && \"Unknown mismatch!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 544, __PRETTY_FUNCTION__)); | |||
545 | ValueVT = EVT::getIntegerVT(*DAG.getContext(), NumParts * PartBits); | |||
546 | Val = DAG.getNode(ISD::TRUNCATE, DL, ValueVT, Val); | |||
547 | if (PartVT == MVT::x86mmx) | |||
548 | Val = DAG.getNode(ISD::BITCAST, DL, PartVT, Val); | |||
549 | } | |||
550 | ||||
551 | // The value may have changed - recompute ValueVT. | |||
552 | ValueVT = Val.getValueType(); | |||
553 | assert(NumParts * PartBits == ValueVT.getSizeInBits() &&((NumParts * PartBits == ValueVT.getSizeInBits() && "Failed to tile the value with PartVT!" ) ? static_cast<void> (0) : __assert_fail ("NumParts * PartBits == ValueVT.getSizeInBits() && \"Failed to tile the value with PartVT!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 554, __PRETTY_FUNCTION__)) | |||
554 | "Failed to tile the value with PartVT!")((NumParts * PartBits == ValueVT.getSizeInBits() && "Failed to tile the value with PartVT!" ) ? static_cast<void> (0) : __assert_fail ("NumParts * PartBits == ValueVT.getSizeInBits() && \"Failed to tile the value with PartVT!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 554, __PRETTY_FUNCTION__)); | |||
555 | ||||
556 | if (NumParts == 1) { | |||
557 | if (PartEVT != ValueVT) { | |||
558 | diagnosePossiblyInvalidConstraint(*DAG.getContext(), V, | |||
559 | "scalar-to-vector conversion failed"); | |||
560 | Val = DAG.getNode(ISD::BITCAST, DL, PartVT, Val); | |||
561 | } | |||
562 | ||||
563 | Parts[0] = Val; | |||
564 | return; | |||
565 | } | |||
566 | ||||
567 | // Expand the value into multiple parts. | |||
568 | if (NumParts & (NumParts - 1)) { | |||
569 | // The number of parts is not a power of 2. Split off and copy the tail. | |||
570 | assert(PartVT.isInteger() && ValueVT.isInteger() &&((PartVT.isInteger() && ValueVT.isInteger() && "Do not know what to expand to!") ? static_cast<void> ( 0) : __assert_fail ("PartVT.isInteger() && ValueVT.isInteger() && \"Do not know what to expand to!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 571, __PRETTY_FUNCTION__)) | |||
571 | "Do not know what to expand to!")((PartVT.isInteger() && ValueVT.isInteger() && "Do not know what to expand to!") ? static_cast<void> ( 0) : __assert_fail ("PartVT.isInteger() && ValueVT.isInteger() && \"Do not know what to expand to!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 571, __PRETTY_FUNCTION__)); | |||
572 | unsigned RoundParts = 1 << Log2_32(NumParts); | |||
573 | unsigned RoundBits = RoundParts * PartBits; | |||
574 | unsigned OddParts = NumParts - RoundParts; | |||
575 | SDValue OddVal = DAG.getNode(ISD::SRL, DL, ValueVT, Val, | |||
576 | DAG.getIntPtrConstant(RoundBits, DL)); | |||
577 | getCopyToParts(DAG, DL, OddVal, Parts + RoundParts, OddParts, PartVT, V, | |||
578 | CallConv); | |||
579 | ||||
580 | if (DAG.getDataLayout().isBigEndian()) | |||
581 | // The odd parts were reversed by getCopyToParts - unreverse them. | |||
582 | std::reverse(Parts + RoundParts, Parts + NumParts); | |||
583 | ||||
584 | NumParts = RoundParts; | |||
585 | ValueVT = EVT::getIntegerVT(*DAG.getContext(), NumParts * PartBits); | |||
586 | Val = DAG.getNode(ISD::TRUNCATE, DL, ValueVT, Val); | |||
587 | } | |||
588 | ||||
589 | // The number of parts is a power of 2. Repeatedly bisect the value using | |||
590 | // EXTRACT_ELEMENT. | |||
591 | Parts[0] = DAG.getNode(ISD::BITCAST, DL, | |||
592 | EVT::getIntegerVT(*DAG.getContext(), | |||
593 | ValueVT.getSizeInBits()), | |||
594 | Val); | |||
595 | ||||
596 | for (unsigned StepSize = NumParts; StepSize > 1; StepSize /= 2) { | |||
597 | for (unsigned i = 0; i < NumParts; i += StepSize) { | |||
598 | unsigned ThisBits = StepSize * PartBits / 2; | |||
599 | EVT ThisVT = EVT::getIntegerVT(*DAG.getContext(), ThisBits); | |||
600 | SDValue &Part0 = Parts[i]; | |||
601 | SDValue &Part1 = Parts[i+StepSize/2]; | |||
602 | ||||
603 | Part1 = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, | |||
604 | ThisVT, Part0, DAG.getIntPtrConstant(1, DL)); | |||
605 | Part0 = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, | |||
606 | ThisVT, Part0, DAG.getIntPtrConstant(0, DL)); | |||
607 | ||||
608 | if (ThisBits == PartBits && ThisVT != PartVT) { | |||
609 | Part0 = DAG.getNode(ISD::BITCAST, DL, PartVT, Part0); | |||
610 | Part1 = DAG.getNode(ISD::BITCAST, DL, PartVT, Part1); | |||
611 | } | |||
612 | } | |||
613 | } | |||
614 | ||||
615 | if (DAG.getDataLayout().isBigEndian()) | |||
616 | std::reverse(Parts, Parts + OrigNumParts); | |||
617 | } | |||
618 | ||||
619 | static SDValue widenVectorToPartType(SelectionDAG &DAG, | |||
620 | SDValue Val, const SDLoc &DL, EVT PartVT) { | |||
621 | if (!PartVT.isVector()) | |||
622 | return SDValue(); | |||
623 | ||||
624 | EVT ValueVT = Val.getValueType(); | |||
625 | unsigned PartNumElts = PartVT.getVectorNumElements(); | |||
626 | unsigned ValueNumElts = ValueVT.getVectorNumElements(); | |||
627 | if (PartNumElts > ValueNumElts && | |||
628 | PartVT.getVectorElementType() == ValueVT.getVectorElementType()) { | |||
629 | EVT ElementVT = PartVT.getVectorElementType(); | |||
630 | // Vector widening case, e.g. <2 x float> -> <4 x float>. Shuffle in | |||
631 | // undef elements. | |||
632 | SmallVector<SDValue, 16> Ops; | |||
633 | DAG.ExtractVectorElements(Val, Ops); | |||
634 | SDValue EltUndef = DAG.getUNDEF(ElementVT); | |||
635 | for (unsigned i = ValueNumElts, e = PartNumElts; i != e; ++i) | |||
636 | Ops.push_back(EltUndef); | |||
637 | ||||
638 | // FIXME: Use CONCAT for 2x -> 4x. | |||
639 | return DAG.getBuildVector(PartVT, DL, Ops); | |||
640 | } | |||
641 | ||||
642 | return SDValue(); | |||
643 | } | |||
644 | ||||
645 | /// getCopyToPartsVector - Create a series of nodes that contain the specified | |||
646 | /// value split into legal parts. | |||
647 | static void getCopyToPartsVector(SelectionDAG &DAG, const SDLoc &DL, | |||
648 | SDValue Val, SDValue *Parts, unsigned NumParts, | |||
649 | MVT PartVT, const Value *V, | |||
650 | Optional<CallingConv::ID> CallConv) { | |||
651 | EVT ValueVT = Val.getValueType(); | |||
652 | assert(ValueVT.isVector() && "Not a vector")((ValueVT.isVector() && "Not a vector") ? static_cast <void> (0) : __assert_fail ("ValueVT.isVector() && \"Not a vector\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 652, __PRETTY_FUNCTION__)); | |||
653 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
654 | const bool IsABIRegCopy = CallConv.hasValue(); | |||
655 | ||||
656 | if (NumParts == 1) { | |||
657 | EVT PartEVT = PartVT; | |||
658 | if (PartEVT == ValueVT) { | |||
659 | // Nothing to do. | |||
660 | } else if (PartVT.getSizeInBits() == ValueVT.getSizeInBits()) { | |||
661 | // Bitconvert vector->vector case. | |||
662 | Val = DAG.getNode(ISD::BITCAST, DL, PartVT, Val); | |||
663 | } else if (SDValue Widened = widenVectorToPartType(DAG, Val, DL, PartVT)) { | |||
664 | Val = Widened; | |||
665 | } else if (PartVT.isVector() && | |||
666 | PartEVT.getVectorElementType().bitsGE( | |||
667 | ValueVT.getVectorElementType()) && | |||
668 | PartEVT.getVectorNumElements() == ValueVT.getVectorNumElements()) { | |||
669 | ||||
670 | // Promoted vector extract | |||
671 | Val = DAG.getAnyExtOrTrunc(Val, DL, PartVT); | |||
672 | } else { | |||
673 | if (ValueVT.getVectorNumElements() == 1) { | |||
674 | Val = DAG.getNode( | |||
675 | ISD::EXTRACT_VECTOR_ELT, DL, PartVT, Val, | |||
676 | DAG.getConstant(0, DL, TLI.getVectorIdxTy(DAG.getDataLayout()))); | |||
677 | } else { | |||
678 | assert(PartVT.getSizeInBits() > ValueVT.getSizeInBits() &&((PartVT.getSizeInBits() > ValueVT.getSizeInBits() && "lossy conversion of vector to scalar type") ? static_cast< void> (0) : __assert_fail ("PartVT.getSizeInBits() > ValueVT.getSizeInBits() && \"lossy conversion of vector to scalar type\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 679, __PRETTY_FUNCTION__)) | |||
679 | "lossy conversion of vector to scalar type")((PartVT.getSizeInBits() > ValueVT.getSizeInBits() && "lossy conversion of vector to scalar type") ? static_cast< void> (0) : __assert_fail ("PartVT.getSizeInBits() > ValueVT.getSizeInBits() && \"lossy conversion of vector to scalar type\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 679, __PRETTY_FUNCTION__)); | |||
680 | EVT IntermediateType = | |||
681 | EVT::getIntegerVT(*DAG.getContext(), ValueVT.getSizeInBits()); | |||
682 | Val = DAG.getBitcast(IntermediateType, Val); | |||
683 | Val = DAG.getAnyExtOrTrunc(Val, DL, PartVT); | |||
684 | } | |||
685 | } | |||
686 | ||||
687 | assert(Val.getValueType() == PartVT && "Unexpected vector part value type")((Val.getValueType() == PartVT && "Unexpected vector part value type" ) ? static_cast<void> (0) : __assert_fail ("Val.getValueType() == PartVT && \"Unexpected vector part value type\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 687, __PRETTY_FUNCTION__)); | |||
688 | Parts[0] = Val; | |||
689 | return; | |||
690 | } | |||
691 | ||||
692 | // Handle a multi-element vector. | |||
693 | EVT IntermediateVT; | |||
694 | MVT RegisterVT; | |||
695 | unsigned NumIntermediates; | |||
696 | unsigned NumRegs; | |||
697 | if (IsABIRegCopy) { | |||
698 | NumRegs = TLI.getVectorTypeBreakdownForCallingConv( | |||
699 | *DAG.getContext(), CallConv.getValue(), ValueVT, IntermediateVT, | |||
700 | NumIntermediates, RegisterVT); | |||
701 | } else { | |||
702 | NumRegs = | |||
703 | TLI.getVectorTypeBreakdown(*DAG.getContext(), ValueVT, IntermediateVT, | |||
704 | NumIntermediates, RegisterVT); | |||
705 | } | |||
706 | ||||
707 | assert(NumRegs == NumParts && "Part count doesn't match vector breakdown!")((NumRegs == NumParts && "Part count doesn't match vector breakdown!" ) ? static_cast<void> (0) : __assert_fail ("NumRegs == NumParts && \"Part count doesn't match vector breakdown!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 707, __PRETTY_FUNCTION__)); | |||
708 | NumParts = NumRegs; // Silence a compiler warning. | |||
709 | assert(RegisterVT == PartVT && "Part type doesn't match vector breakdown!")((RegisterVT == PartVT && "Part type doesn't match vector breakdown!" ) ? static_cast<void> (0) : __assert_fail ("RegisterVT == PartVT && \"Part type doesn't match vector breakdown!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 709, __PRETTY_FUNCTION__)); | |||
710 | ||||
711 | unsigned IntermediateNumElts = IntermediateVT.isVector() ? | |||
712 | IntermediateVT.getVectorNumElements() : 1; | |||
713 | ||||
714 | // Convert the vector to the appropiate type if necessary. | |||
715 | unsigned DestVectorNoElts = NumIntermediates * IntermediateNumElts; | |||
716 | ||||
717 | EVT BuiltVectorTy = EVT::getVectorVT( | |||
718 | *DAG.getContext(), IntermediateVT.getScalarType(), DestVectorNoElts); | |||
719 | MVT IdxVT = TLI.getVectorIdxTy(DAG.getDataLayout()); | |||
720 | if (ValueVT != BuiltVectorTy) { | |||
721 | if (SDValue Widened = widenVectorToPartType(DAG, Val, DL, BuiltVectorTy)) | |||
722 | Val = Widened; | |||
723 | ||||
724 | Val = DAG.getNode(ISD::BITCAST, DL, BuiltVectorTy, Val); | |||
725 | } | |||
726 | ||||
727 | // Split the vector into intermediate operands. | |||
728 | SmallVector<SDValue, 8> Ops(NumIntermediates); | |||
729 | for (unsigned i = 0; i != NumIntermediates; ++i) { | |||
730 | if (IntermediateVT.isVector()) { | |||
731 | Ops[i] = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, IntermediateVT, Val, | |||
732 | DAG.getConstant(i * IntermediateNumElts, DL, IdxVT)); | |||
733 | } else { | |||
734 | Ops[i] = DAG.getNode( | |||
735 | ISD::EXTRACT_VECTOR_ELT, DL, IntermediateVT, Val, | |||
736 | DAG.getConstant(i, DL, IdxVT)); | |||
737 | } | |||
738 | } | |||
739 | ||||
740 | // Split the intermediate operands into legal parts. | |||
741 | if (NumParts == NumIntermediates) { | |||
742 | // If the register was not expanded, promote or copy the value, | |||
743 | // as appropriate. | |||
744 | for (unsigned i = 0; i != NumParts; ++i) | |||
745 | getCopyToParts(DAG, DL, Ops[i], &Parts[i], 1, PartVT, V, CallConv); | |||
746 | } else if (NumParts > 0) { | |||
747 | // If the intermediate type was expanded, split each the value into | |||
748 | // legal parts. | |||
749 | assert(NumIntermediates != 0 && "division by zero")((NumIntermediates != 0 && "division by zero") ? static_cast <void> (0) : __assert_fail ("NumIntermediates != 0 && \"division by zero\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 749, __PRETTY_FUNCTION__)); | |||
750 | assert(NumParts % NumIntermediates == 0 &&((NumParts % NumIntermediates == 0 && "Must expand into a divisible number of parts!" ) ? static_cast<void> (0) : __assert_fail ("NumParts % NumIntermediates == 0 && \"Must expand into a divisible number of parts!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 751, __PRETTY_FUNCTION__)) | |||
751 | "Must expand into a divisible number of parts!")((NumParts % NumIntermediates == 0 && "Must expand into a divisible number of parts!" ) ? static_cast<void> (0) : __assert_fail ("NumParts % NumIntermediates == 0 && \"Must expand into a divisible number of parts!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 751, __PRETTY_FUNCTION__)); | |||
752 | unsigned Factor = NumParts / NumIntermediates; | |||
753 | for (unsigned i = 0; i != NumIntermediates; ++i) | |||
754 | getCopyToParts(DAG, DL, Ops[i], &Parts[i * Factor], Factor, PartVT, V, | |||
755 | CallConv); | |||
756 | } | |||
757 | } | |||
758 | ||||
759 | RegsForValue::RegsForValue(const SmallVector<unsigned, 4> ®s, MVT regvt, | |||
760 | EVT valuevt, Optional<CallingConv::ID> CC) | |||
761 | : ValueVTs(1, valuevt), RegVTs(1, regvt), Regs(regs), | |||
762 | RegCount(1, regs.size()), CallConv(CC) {} | |||
763 | ||||
764 | RegsForValue::RegsForValue(LLVMContext &Context, const TargetLowering &TLI, | |||
765 | const DataLayout &DL, unsigned Reg, Type *Ty, | |||
766 | Optional<CallingConv::ID> CC) { | |||
767 | ComputeValueVTs(TLI, DL, Ty, ValueVTs); | |||
768 | ||||
769 | CallConv = CC; | |||
770 | ||||
771 | for (EVT ValueVT : ValueVTs) { | |||
772 | unsigned NumRegs = | |||
773 | isABIMangled() | |||
774 | ? TLI.getNumRegistersForCallingConv(Context, CC.getValue(), ValueVT) | |||
775 | : TLI.getNumRegisters(Context, ValueVT); | |||
776 | MVT RegisterVT = | |||
777 | isABIMangled() | |||
778 | ? TLI.getRegisterTypeForCallingConv(Context, CC.getValue(), ValueVT) | |||
779 | : TLI.getRegisterType(Context, ValueVT); | |||
780 | for (unsigned i = 0; i != NumRegs; ++i) | |||
781 | Regs.push_back(Reg + i); | |||
782 | RegVTs.push_back(RegisterVT); | |||
783 | RegCount.push_back(NumRegs); | |||
784 | Reg += NumRegs; | |||
785 | } | |||
786 | } | |||
787 | ||||
788 | SDValue RegsForValue::getCopyFromRegs(SelectionDAG &DAG, | |||
789 | FunctionLoweringInfo &FuncInfo, | |||
790 | const SDLoc &dl, SDValue &Chain, | |||
791 | SDValue *Flag, const Value *V) const { | |||
792 | // A Value with type {} or [0 x %t] needs no registers. | |||
793 | if (ValueVTs.empty()) | |||
794 | return SDValue(); | |||
795 | ||||
796 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
797 | ||||
798 | // Assemble the legal parts into the final values. | |||
799 | SmallVector<SDValue, 4> Values(ValueVTs.size()); | |||
800 | SmallVector<SDValue, 8> Parts; | |||
801 | for (unsigned Value = 0, Part = 0, e = ValueVTs.size(); Value != e; ++Value) { | |||
802 | // Copy the legal parts from the registers. | |||
803 | EVT ValueVT = ValueVTs[Value]; | |||
804 | unsigned NumRegs = RegCount[Value]; | |||
805 | MVT RegisterVT = isABIMangled() ? TLI.getRegisterTypeForCallingConv( | |||
806 | *DAG.getContext(), | |||
807 | CallConv.getValue(), RegVTs[Value]) | |||
808 | : RegVTs[Value]; | |||
809 | ||||
810 | Parts.resize(NumRegs); | |||
811 | for (unsigned i = 0; i != NumRegs; ++i) { | |||
812 | SDValue P; | |||
813 | if (!Flag) { | |||
814 | P = DAG.getCopyFromReg(Chain, dl, Regs[Part+i], RegisterVT); | |||
815 | } else { | |||
816 | P = DAG.getCopyFromReg(Chain, dl, Regs[Part+i], RegisterVT, *Flag); | |||
817 | *Flag = P.getValue(2); | |||
818 | } | |||
819 | ||||
820 | Chain = P.getValue(1); | |||
821 | Parts[i] = P; | |||
822 | ||||
823 | // If the source register was virtual and if we know something about it, | |||
824 | // add an assert node. | |||
825 | if (!TargetRegisterInfo::isVirtualRegister(Regs[Part+i]) || | |||
826 | !RegisterVT.isInteger()) | |||
827 | continue; | |||
828 | ||||
829 | const FunctionLoweringInfo::LiveOutInfo *LOI = | |||
830 | FuncInfo.GetLiveOutRegInfo(Regs[Part+i]); | |||
831 | if (!LOI) | |||
832 | continue; | |||
833 | ||||
834 | unsigned RegSize = RegisterVT.getScalarSizeInBits(); | |||
835 | unsigned NumSignBits = LOI->NumSignBits; | |||
836 | unsigned NumZeroBits = LOI->Known.countMinLeadingZeros(); | |||
837 | ||||
838 | if (NumZeroBits == RegSize) { | |||
839 | // The current value is a zero. | |||
840 | // Explicitly express that as it would be easier for | |||
841 | // optimizations to kick in. | |||
842 | Parts[i] = DAG.getConstant(0, dl, RegisterVT); | |||
843 | continue; | |||
844 | } | |||
845 | ||||
846 | // FIXME: We capture more information than the dag can represent. For | |||
847 | // now, just use the tightest assertzext/assertsext possible. | |||
848 | bool isSExt; | |||
849 | EVT FromVT(MVT::Other); | |||
850 | if (NumZeroBits) { | |||
851 | FromVT = EVT::getIntegerVT(*DAG.getContext(), RegSize - NumZeroBits); | |||
852 | isSExt = false; | |||
853 | } else if (NumSignBits > 1) { | |||
854 | FromVT = | |||
855 | EVT::getIntegerVT(*DAG.getContext(), RegSize - NumSignBits + 1); | |||
856 | isSExt = true; | |||
857 | } else { | |||
858 | continue; | |||
859 | } | |||
860 | // Add an assertion node. | |||
861 | assert(FromVT != MVT::Other)((FromVT != MVT::Other) ? static_cast<void> (0) : __assert_fail ("FromVT != MVT::Other", "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 861, __PRETTY_FUNCTION__)); | |||
862 | Parts[i] = DAG.getNode(isSExt ? ISD::AssertSext : ISD::AssertZext, dl, | |||
863 | RegisterVT, P, DAG.getValueType(FromVT)); | |||
864 | } | |||
865 | ||||
866 | Values[Value] = getCopyFromParts(DAG, dl, Parts.begin(), NumRegs, | |||
867 | RegisterVT, ValueVT, V, CallConv); | |||
868 | Part += NumRegs; | |||
869 | Parts.clear(); | |||
870 | } | |||
871 | ||||
872 | return DAG.getNode(ISD::MERGE_VALUES, dl, DAG.getVTList(ValueVTs), Values); | |||
873 | } | |||
874 | ||||
875 | void RegsForValue::getCopyToRegs(SDValue Val, SelectionDAG &DAG, | |||
876 | const SDLoc &dl, SDValue &Chain, SDValue *Flag, | |||
877 | const Value *V, | |||
878 | ISD::NodeType PreferredExtendType) const { | |||
879 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
880 | ISD::NodeType ExtendKind = PreferredExtendType; | |||
881 | ||||
882 | // Get the list of the values's legal parts. | |||
883 | unsigned NumRegs = Regs.size(); | |||
884 | SmallVector<SDValue, 8> Parts(NumRegs); | |||
885 | for (unsigned Value = 0, Part = 0, e = ValueVTs.size(); Value != e; ++Value) { | |||
886 | unsigned NumParts = RegCount[Value]; | |||
887 | ||||
888 | MVT RegisterVT = isABIMangled() ? TLI.getRegisterTypeForCallingConv( | |||
889 | *DAG.getContext(), | |||
890 | CallConv.getValue(), RegVTs[Value]) | |||
891 | : RegVTs[Value]; | |||
892 | ||||
893 | if (ExtendKind == ISD::ANY_EXTEND && TLI.isZExtFree(Val, RegisterVT)) | |||
894 | ExtendKind = ISD::ZERO_EXTEND; | |||
895 | ||||
896 | getCopyToParts(DAG, dl, Val.getValue(Val.getResNo() + Value), &Parts[Part], | |||
897 | NumParts, RegisterVT, V, CallConv, ExtendKind); | |||
898 | Part += NumParts; | |||
899 | } | |||
900 | ||||
901 | // Copy the parts into the registers. | |||
902 | SmallVector<SDValue, 8> Chains(NumRegs); | |||
903 | for (unsigned i = 0; i != NumRegs; ++i) { | |||
904 | SDValue Part; | |||
905 | if (!Flag) { | |||
906 | Part = DAG.getCopyToReg(Chain, dl, Regs[i], Parts[i]); | |||
907 | } else { | |||
908 | Part = DAG.getCopyToReg(Chain, dl, Regs[i], Parts[i], *Flag); | |||
909 | *Flag = Part.getValue(1); | |||
910 | } | |||
911 | ||||
912 | Chains[i] = Part.getValue(0); | |||
913 | } | |||
914 | ||||
915 | if (NumRegs == 1 || Flag) | |||
916 | // If NumRegs > 1 && Flag is used then the use of the last CopyToReg is | |||
917 | // flagged to it. That is the CopyToReg nodes and the user are considered | |||
918 | // a single scheduling unit. If we create a TokenFactor and return it as | |||
919 | // chain, then the TokenFactor is both a predecessor (operand) of the | |||
920 | // user as well as a successor (the TF operands are flagged to the user). | |||
921 | // c1, f1 = CopyToReg | |||
922 | // c2, f2 = CopyToReg | |||
923 | // c3 = TokenFactor c1, c2 | |||
924 | // ... | |||
925 | // = op c3, ..., f2 | |||
926 | Chain = Chains[NumRegs-1]; | |||
927 | else | |||
928 | Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Chains); | |||
929 | } | |||
930 | ||||
931 | void RegsForValue::AddInlineAsmOperands(unsigned Code, bool HasMatching, | |||
932 | unsigned MatchingIdx, const SDLoc &dl, | |||
933 | SelectionDAG &DAG, | |||
934 | std::vector<SDValue> &Ops) const { | |||
935 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
936 | ||||
937 | unsigned Flag = InlineAsm::getFlagWord(Code, Regs.size()); | |||
938 | if (HasMatching) | |||
939 | Flag = InlineAsm::getFlagWordForMatchingOp(Flag, MatchingIdx); | |||
940 | else if (!Regs.empty() && | |||
941 | TargetRegisterInfo::isVirtualRegister(Regs.front())) { | |||
942 | // Put the register class of the virtual registers in the flag word. That | |||
943 | // way, later passes can recompute register class constraints for inline | |||
944 | // assembly as well as normal instructions. | |||
945 | // Don't do this for tied operands that can use the regclass information | |||
946 | // from the def. | |||
947 | const MachineRegisterInfo &MRI = DAG.getMachineFunction().getRegInfo(); | |||
948 | const TargetRegisterClass *RC = MRI.getRegClass(Regs.front()); | |||
949 | Flag = InlineAsm::getFlagWordForRegClass(Flag, RC->getID()); | |||
950 | } | |||
951 | ||||
952 | SDValue Res = DAG.getTargetConstant(Flag, dl, MVT::i32); | |||
953 | Ops.push_back(Res); | |||
954 | ||||
955 | if (Code == InlineAsm::Kind_Clobber) { | |||
956 | // Clobbers should always have a 1:1 mapping with registers, and may | |||
957 | // reference registers that have illegal (e.g. vector) types. Hence, we | |||
958 | // shouldn't try to apply any sort of splitting logic to them. | |||
959 | assert(Regs.size() == RegVTs.size() && Regs.size() == ValueVTs.size() &&((Regs.size() == RegVTs.size() && Regs.size() == ValueVTs .size() && "No 1:1 mapping from clobbers to regs?") ? static_cast<void> (0) : __assert_fail ("Regs.size() == RegVTs.size() && Regs.size() == ValueVTs.size() && \"No 1:1 mapping from clobbers to regs?\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 960, __PRETTY_FUNCTION__)) | |||
960 | "No 1:1 mapping from clobbers to regs?")((Regs.size() == RegVTs.size() && Regs.size() == ValueVTs .size() && "No 1:1 mapping from clobbers to regs?") ? static_cast<void> (0) : __assert_fail ("Regs.size() == RegVTs.size() && Regs.size() == ValueVTs.size() && \"No 1:1 mapping from clobbers to regs?\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 960, __PRETTY_FUNCTION__)); | |||
961 | unsigned SP = TLI.getStackPointerRegisterToSaveRestore(); | |||
962 | (void)SP; | |||
963 | for (unsigned I = 0, E = ValueVTs.size(); I != E; ++I) { | |||
964 | Ops.push_back(DAG.getRegister(Regs[I], RegVTs[I])); | |||
965 | assert((((Regs[I] != SP || DAG.getMachineFunction().getFrameInfo().hasOpaqueSPAdjustment ()) && "If we clobbered the stack pointer, MFI should know about it." ) ? static_cast<void> (0) : __assert_fail ("(Regs[I] != SP || DAG.getMachineFunction().getFrameInfo().hasOpaqueSPAdjustment()) && \"If we clobbered the stack pointer, MFI should know about it.\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 968, __PRETTY_FUNCTION__)) | |||
966 | (Regs[I] != SP ||(((Regs[I] != SP || DAG.getMachineFunction().getFrameInfo().hasOpaqueSPAdjustment ()) && "If we clobbered the stack pointer, MFI should know about it." ) ? static_cast<void> (0) : __assert_fail ("(Regs[I] != SP || DAG.getMachineFunction().getFrameInfo().hasOpaqueSPAdjustment()) && \"If we clobbered the stack pointer, MFI should know about it.\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 968, __PRETTY_FUNCTION__)) | |||
967 | DAG.getMachineFunction().getFrameInfo().hasOpaqueSPAdjustment()) &&(((Regs[I] != SP || DAG.getMachineFunction().getFrameInfo().hasOpaqueSPAdjustment ()) && "If we clobbered the stack pointer, MFI should know about it." ) ? static_cast<void> (0) : __assert_fail ("(Regs[I] != SP || DAG.getMachineFunction().getFrameInfo().hasOpaqueSPAdjustment()) && \"If we clobbered the stack pointer, MFI should know about it.\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 968, __PRETTY_FUNCTION__)) | |||
968 | "If we clobbered the stack pointer, MFI should know about it.")(((Regs[I] != SP || DAG.getMachineFunction().getFrameInfo().hasOpaqueSPAdjustment ()) && "If we clobbered the stack pointer, MFI should know about it." ) ? static_cast<void> (0) : __assert_fail ("(Regs[I] != SP || DAG.getMachineFunction().getFrameInfo().hasOpaqueSPAdjustment()) && \"If we clobbered the stack pointer, MFI should know about it.\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 968, __PRETTY_FUNCTION__)); | |||
969 | } | |||
970 | return; | |||
971 | } | |||
972 | ||||
973 | for (unsigned Value = 0, Reg = 0, e = ValueVTs.size(); Value != e; ++Value) { | |||
974 | unsigned NumRegs = TLI.getNumRegisters(*DAG.getContext(), ValueVTs[Value]); | |||
975 | MVT RegisterVT = RegVTs[Value]; | |||
976 | for (unsigned i = 0; i != NumRegs; ++i) { | |||
977 | assert(Reg < Regs.size() && "Mismatch in # registers expected")((Reg < Regs.size() && "Mismatch in # registers expected" ) ? static_cast<void> (0) : __assert_fail ("Reg < Regs.size() && \"Mismatch in # registers expected\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 977, __PRETTY_FUNCTION__)); | |||
978 | unsigned TheReg = Regs[Reg++]; | |||
979 | Ops.push_back(DAG.getRegister(TheReg, RegisterVT)); | |||
980 | } | |||
981 | } | |||
982 | } | |||
983 | ||||
984 | SmallVector<std::pair<unsigned, unsigned>, 4> | |||
985 | RegsForValue::getRegsAndSizes() const { | |||
986 | SmallVector<std::pair<unsigned, unsigned>, 4> OutVec; | |||
987 | unsigned I = 0; | |||
988 | for (auto CountAndVT : zip_first(RegCount, RegVTs)) { | |||
989 | unsigned RegCount = std::get<0>(CountAndVT); | |||
990 | MVT RegisterVT = std::get<1>(CountAndVT); | |||
991 | unsigned RegisterSize = RegisterVT.getSizeInBits(); | |||
992 | for (unsigned E = I + RegCount; I != E; ++I) | |||
993 | OutVec.push_back(std::make_pair(Regs[I], RegisterSize)); | |||
994 | } | |||
995 | return OutVec; | |||
996 | } | |||
997 | ||||
998 | void SelectionDAGBuilder::init(GCFunctionInfo *gfi, AliasAnalysis *aa, | |||
999 | const TargetLibraryInfo *li) { | |||
1000 | AA = aa; | |||
1001 | GFI = gfi; | |||
1002 | LibInfo = li; | |||
1003 | DL = &DAG.getDataLayout(); | |||
1004 | Context = DAG.getContext(); | |||
1005 | LPadToCallSiteMap.clear(); | |||
1006 | } | |||
1007 | ||||
1008 | void SelectionDAGBuilder::clear() { | |||
1009 | NodeMap.clear(); | |||
1010 | UnusedArgNodeMap.clear(); | |||
1011 | PendingLoads.clear(); | |||
1012 | PendingExports.clear(); | |||
1013 | CurInst = nullptr; | |||
1014 | HasTailCall = false; | |||
1015 | SDNodeOrder = LowestSDNodeOrder; | |||
1016 | StatepointLowering.clear(); | |||
1017 | } | |||
1018 | ||||
1019 | void SelectionDAGBuilder::clearDanglingDebugInfo() { | |||
1020 | DanglingDebugInfoMap.clear(); | |||
1021 | } | |||
1022 | ||||
1023 | SDValue SelectionDAGBuilder::getRoot() { | |||
1024 | if (PendingLoads.empty()) | |||
1025 | return DAG.getRoot(); | |||
1026 | ||||
1027 | if (PendingLoads.size() == 1) { | |||
1028 | SDValue Root = PendingLoads[0]; | |||
1029 | DAG.setRoot(Root); | |||
1030 | PendingLoads.clear(); | |||
1031 | return Root; | |||
1032 | } | |||
1033 | ||||
1034 | // Otherwise, we have to make a token factor node. | |||
1035 | // If we have >= 2^16 loads then split across multiple token factors as | |||
1036 | // there's a 64k limit on the number of SDNode operands. | |||
1037 | SDValue Root; | |||
1038 | size_t Limit = (1 << 16) - 1; | |||
1039 | while (PendingLoads.size() > Limit) { | |||
1040 | unsigned SliceIdx = PendingLoads.size() - Limit; | |||
1041 | auto ExtractedTFs = ArrayRef<SDValue>(PendingLoads).slice(SliceIdx, Limit); | |||
1042 | SDValue NewTF = | |||
1043 | DAG.getNode(ISD::TokenFactor, getCurSDLoc(), MVT::Other, ExtractedTFs); | |||
1044 | PendingLoads.erase(PendingLoads.begin() + SliceIdx, PendingLoads.end()); | |||
1045 | PendingLoads.emplace_back(NewTF); | |||
1046 | } | |||
1047 | Root = DAG.getNode(ISD::TokenFactor, getCurSDLoc(), MVT::Other, PendingLoads); | |||
1048 | PendingLoads.clear(); | |||
1049 | DAG.setRoot(Root); | |||
1050 | return Root; | |||
1051 | } | |||
1052 | ||||
1053 | SDValue SelectionDAGBuilder::getControlRoot() { | |||
1054 | SDValue Root = DAG.getRoot(); | |||
1055 | ||||
1056 | if (PendingExports.empty()) | |||
1057 | return Root; | |||
1058 | ||||
1059 | // Turn all of the CopyToReg chains into one factored node. | |||
1060 | if (Root.getOpcode() != ISD::EntryToken) { | |||
1061 | unsigned i = 0, e = PendingExports.size(); | |||
1062 | for (; i != e; ++i) { | |||
1063 | assert(PendingExports[i].getNode()->getNumOperands() > 1)((PendingExports[i].getNode()->getNumOperands() > 1) ? static_cast <void> (0) : __assert_fail ("PendingExports[i].getNode()->getNumOperands() > 1" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 1063, __PRETTY_FUNCTION__)); | |||
1064 | if (PendingExports[i].getNode()->getOperand(0) == Root) | |||
1065 | break; // Don't add the root if we already indirectly depend on it. | |||
1066 | } | |||
1067 | ||||
1068 | if (i == e) | |||
1069 | PendingExports.push_back(Root); | |||
1070 | } | |||
1071 | ||||
1072 | Root = DAG.getNode(ISD::TokenFactor, getCurSDLoc(), MVT::Other, | |||
1073 | PendingExports); | |||
1074 | PendingExports.clear(); | |||
1075 | DAG.setRoot(Root); | |||
1076 | return Root; | |||
1077 | } | |||
1078 | ||||
1079 | void SelectionDAGBuilder::visit(const Instruction &I) { | |||
1080 | // Set up outgoing PHI node register values before emitting the terminator. | |||
1081 | if (I.isTerminator()) { | |||
1082 | HandlePHINodesInSuccessorBlocks(I.getParent()); | |||
1083 | } | |||
1084 | ||||
1085 | // Increase the SDNodeOrder if dealing with a non-debug instruction. | |||
1086 | if (!isa<DbgInfoIntrinsic>(I)) | |||
1087 | ++SDNodeOrder; | |||
1088 | ||||
1089 | CurInst = &I; | |||
1090 | ||||
1091 | visit(I.getOpcode(), I); | |||
1092 | ||||
1093 | if (auto *FPMO = dyn_cast<FPMathOperator>(&I)) { | |||
1094 | // Propagate the fast-math-flags of this IR instruction to the DAG node that | |||
1095 | // maps to this instruction. | |||
1096 | // TODO: We could handle all flags (nsw, etc) here. | |||
1097 | // TODO: If an IR instruction maps to >1 node, only the final node will have | |||
1098 | // flags set. | |||
1099 | if (SDNode *Node = getNodeForIRValue(&I)) { | |||
1100 | SDNodeFlags IncomingFlags; | |||
1101 | IncomingFlags.copyFMF(*FPMO); | |||
1102 | if (!Node->getFlags().isDefined()) | |||
1103 | Node->setFlags(IncomingFlags); | |||
1104 | else | |||
1105 | Node->intersectFlagsWith(IncomingFlags); | |||
1106 | } | |||
1107 | } | |||
1108 | ||||
1109 | if (!I.isTerminator() && !HasTailCall && | |||
1110 | !isStatepoint(&I)) // statepoints handle their exports internally | |||
1111 | CopyToExportRegsIfNeeded(&I); | |||
1112 | ||||
1113 | CurInst = nullptr; | |||
1114 | } | |||
1115 | ||||
1116 | void SelectionDAGBuilder::visitPHI(const PHINode &) { | |||
1117 | llvm_unreachable("SelectionDAGBuilder shouldn't visit PHI nodes!")::llvm::llvm_unreachable_internal("SelectionDAGBuilder shouldn't visit PHI nodes!" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 1117); | |||
1118 | } | |||
1119 | ||||
1120 | void SelectionDAGBuilder::visit(unsigned Opcode, const User &I) { | |||
1121 | // Note: this doesn't use InstVisitor, because it has to work with | |||
1122 | // ConstantExpr's in addition to instructions. | |||
1123 | switch (Opcode) { | |||
1124 | default: llvm_unreachable("Unknown instruction type encountered!")::llvm::llvm_unreachable_internal("Unknown instruction type encountered!" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 1124); | |||
1125 | // Build the switch statement using the Instruction.def file. | |||
1126 | #define HANDLE_INST(NUM, OPCODE, CLASS) \ | |||
1127 | case Instruction::OPCODE: visit##OPCODE((const CLASS&)I); break; | |||
1128 | #include "llvm/IR/Instruction.def" | |||
1129 | } | |||
1130 | } | |||
1131 | ||||
1132 | void SelectionDAGBuilder::dropDanglingDebugInfo(const DILocalVariable *Variable, | |||
1133 | const DIExpression *Expr) { | |||
1134 | auto isMatchingDbgValue = [&](DanglingDebugInfo &DDI) { | |||
1135 | const DbgValueInst *DI = DDI.getDI(); | |||
1136 | DIVariable *DanglingVariable = DI->getVariable(); | |||
1137 | DIExpression *DanglingExpr = DI->getExpression(); | |||
1138 | if (DanglingVariable == Variable && Expr->fragmentsOverlap(DanglingExpr)) { | |||
1139 | LLVM_DEBUG(dbgs() << "Dropping dangling debug info for " << *DI << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { dbgs() << "Dropping dangling debug info for " << *DI << "\n"; } } while (false); | |||
1140 | return true; | |||
1141 | } | |||
1142 | return false; | |||
1143 | }; | |||
1144 | ||||
1145 | for (auto &DDIMI : DanglingDebugInfoMap) { | |||
1146 | DanglingDebugInfoVector &DDIV = DDIMI.second; | |||
1147 | DDIV.erase(remove_if(DDIV, isMatchingDbgValue), DDIV.end()); | |||
1148 | } | |||
1149 | } | |||
1150 | ||||
1151 | // resolveDanglingDebugInfo - if we saw an earlier dbg_value referring to V, | |||
1152 | // generate the debug data structures now that we've seen its definition. | |||
1153 | void SelectionDAGBuilder::resolveDanglingDebugInfo(const Value *V, | |||
1154 | SDValue Val) { | |||
1155 | auto DanglingDbgInfoIt = DanglingDebugInfoMap.find(V); | |||
1156 | if (DanglingDbgInfoIt == DanglingDebugInfoMap.end()) | |||
1157 | return; | |||
1158 | ||||
1159 | DanglingDebugInfoVector &DDIV = DanglingDbgInfoIt->second; | |||
1160 | for (auto &DDI : DDIV) { | |||
1161 | const DbgValueInst *DI = DDI.getDI(); | |||
1162 | assert(DI && "Ill-formed DanglingDebugInfo")((DI && "Ill-formed DanglingDebugInfo") ? static_cast <void> (0) : __assert_fail ("DI && \"Ill-formed DanglingDebugInfo\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 1162, __PRETTY_FUNCTION__)); | |||
1163 | DebugLoc dl = DDI.getdl(); | |||
1164 | unsigned ValSDNodeOrder = Val.getNode()->getIROrder(); | |||
1165 | unsigned DbgSDNodeOrder = DDI.getSDNodeOrder(); | |||
1166 | DILocalVariable *Variable = DI->getVariable(); | |||
1167 | DIExpression *Expr = DI->getExpression(); | |||
1168 | assert(Variable->isValidLocationForIntrinsic(dl) &&((Variable->isValidLocationForIntrinsic(dl) && "Expected inlined-at fields to agree" ) ? static_cast<void> (0) : __assert_fail ("Variable->isValidLocationForIntrinsic(dl) && \"Expected inlined-at fields to agree\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 1169, __PRETTY_FUNCTION__)) | |||
1169 | "Expected inlined-at fields to agree")((Variable->isValidLocationForIntrinsic(dl) && "Expected inlined-at fields to agree" ) ? static_cast<void> (0) : __assert_fail ("Variable->isValidLocationForIntrinsic(dl) && \"Expected inlined-at fields to agree\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 1169, __PRETTY_FUNCTION__)); | |||
1170 | SDDbgValue *SDV; | |||
1171 | if (Val.getNode()) { | |||
1172 | if (!EmitFuncArgumentDbgValue(V, Variable, Expr, dl, false, Val)) { | |||
1173 | LLVM_DEBUG(dbgs() << "Resolve dangling debug info [order="do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { dbgs() << "Resolve dangling debug info [order=" << DbgSDNodeOrder << "] for:\n " << *DI << "\n"; } } while (false) | |||
1174 | << DbgSDNodeOrder << "] for:\n " << *DI << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { dbgs() << "Resolve dangling debug info [order=" << DbgSDNodeOrder << "] for:\n " << *DI << "\n"; } } while (false); | |||
1175 | LLVM_DEBUG(dbgs() << " By mapping to:\n "; Val.dump())do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { dbgs() << " By mapping to:\n "; Val.dump (); } } while (false); | |||
1176 | // Increase the SDNodeOrder for the DbgValue here to make sure it is | |||
1177 | // inserted after the definition of Val when emitting the instructions | |||
1178 | // after ISel. An alternative could be to teach | |||
1179 | // ScheduleDAGSDNodes::EmitSchedule to delay the insertion properly. | |||
1180 | LLVM_DEBUG(if (ValSDNodeOrder > DbgSDNodeOrder) dbgs()do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { if (ValSDNodeOrder > DbgSDNodeOrder) dbgs() << "changing SDNodeOrder from " << DbgSDNodeOrder << " to " << ValSDNodeOrder << "\n"; } } while (false ) | |||
1181 | << "changing SDNodeOrder from " << DbgSDNodeOrder << " to "do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { if (ValSDNodeOrder > DbgSDNodeOrder) dbgs() << "changing SDNodeOrder from " << DbgSDNodeOrder << " to " << ValSDNodeOrder << "\n"; } } while (false ) | |||
1182 | << ValSDNodeOrder << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { if (ValSDNodeOrder > DbgSDNodeOrder) dbgs() << "changing SDNodeOrder from " << DbgSDNodeOrder << " to " << ValSDNodeOrder << "\n"; } } while (false ); | |||
1183 | SDV = getDbgValue(Val, Variable, Expr, dl, | |||
1184 | std::max(DbgSDNodeOrder, ValSDNodeOrder)); | |||
1185 | DAG.AddDbgValue(SDV, Val.getNode(), false); | |||
1186 | } else | |||
1187 | LLVM_DEBUG(dbgs() << "Resolved dangling debug info for " << *DIdo { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { dbgs() << "Resolved dangling debug info for " << *DI << "in EmitFuncArgumentDbgValue\n"; } } while (false) | |||
1188 | << "in EmitFuncArgumentDbgValue\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { dbgs() << "Resolved dangling debug info for " << *DI << "in EmitFuncArgumentDbgValue\n"; } } while (false); | |||
1189 | } else | |||
1190 | LLVM_DEBUG(dbgs() << "Dropping debug info for " << *DI << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { dbgs() << "Dropping debug info for " << *DI << "\n"; } } while (false); | |||
1191 | } | |||
1192 | DDIV.clear(); | |||
1193 | } | |||
1194 | ||||
1195 | /// getCopyFromRegs - If there was virtual register allocated for the value V | |||
1196 | /// emit CopyFromReg of the specified type Ty. Return empty SDValue() otherwise. | |||
1197 | SDValue SelectionDAGBuilder::getCopyFromRegs(const Value *V, Type *Ty) { | |||
1198 | DenseMap<const Value *, unsigned>::iterator It = FuncInfo.ValueMap.find(V); | |||
1199 | SDValue Result; | |||
1200 | ||||
1201 | if (It != FuncInfo.ValueMap.end()) { | |||
1202 | unsigned InReg = It->second; | |||
1203 | ||||
1204 | RegsForValue RFV(*DAG.getContext(), DAG.getTargetLoweringInfo(), | |||
1205 | DAG.getDataLayout(), InReg, Ty, | |||
1206 | None); // This is not an ABI copy. | |||
1207 | SDValue Chain = DAG.getEntryNode(); | |||
1208 | Result = RFV.getCopyFromRegs(DAG, FuncInfo, getCurSDLoc(), Chain, nullptr, | |||
1209 | V); | |||
1210 | resolveDanglingDebugInfo(V, Result); | |||
1211 | } | |||
1212 | ||||
1213 | return Result; | |||
1214 | } | |||
1215 | ||||
1216 | /// getValue - Return an SDValue for the given Value. | |||
1217 | SDValue SelectionDAGBuilder::getValue(const Value *V) { | |||
1218 | // If we already have an SDValue for this value, use it. It's important | |||
1219 | // to do this first, so that we don't create a CopyFromReg if we already | |||
1220 | // have a regular SDValue. | |||
1221 | SDValue &N = NodeMap[V]; | |||
1222 | if (N.getNode()) return N; | |||
1223 | ||||
1224 | // If there's a virtual register allocated and initialized for this | |||
1225 | // value, use it. | |||
1226 | if (SDValue copyFromReg = getCopyFromRegs(V, V->getType())) | |||
1227 | return copyFromReg; | |||
1228 | ||||
1229 | // Otherwise create a new SDValue and remember it. | |||
1230 | SDValue Val = getValueImpl(V); | |||
1231 | NodeMap[V] = Val; | |||
1232 | resolveDanglingDebugInfo(V, Val); | |||
1233 | return Val; | |||
1234 | } | |||
1235 | ||||
1236 | // Return true if SDValue exists for the given Value | |||
1237 | bool SelectionDAGBuilder::findValue(const Value *V) const { | |||
1238 | return (NodeMap.find(V) != NodeMap.end()) || | |||
1239 | (FuncInfo.ValueMap.find(V) != FuncInfo.ValueMap.end()); | |||
1240 | } | |||
1241 | ||||
1242 | /// getNonRegisterValue - Return an SDValue for the given Value, but | |||
1243 | /// don't look in FuncInfo.ValueMap for a virtual register. | |||
1244 | SDValue SelectionDAGBuilder::getNonRegisterValue(const Value *V) { | |||
1245 | // If we already have an SDValue for this value, use it. | |||
1246 | SDValue &N = NodeMap[V]; | |||
1247 | if (N.getNode()) { | |||
1248 | if (isa<ConstantSDNode>(N) || isa<ConstantFPSDNode>(N)) { | |||
1249 | // Remove the debug location from the node as the node is about to be used | |||
1250 | // in a location which may differ from the original debug location. This | |||
1251 | // is relevant to Constant and ConstantFP nodes because they can appear | |||
1252 | // as constant expressions inside PHI nodes. | |||
1253 | N->setDebugLoc(DebugLoc()); | |||
1254 | } | |||
1255 | return N; | |||
1256 | } | |||
1257 | ||||
1258 | // Otherwise create a new SDValue and remember it. | |||
1259 | SDValue Val = getValueImpl(V); | |||
1260 | NodeMap[V] = Val; | |||
1261 | resolveDanglingDebugInfo(V, Val); | |||
1262 | return Val; | |||
1263 | } | |||
1264 | ||||
1265 | /// getValueImpl - Helper function for getValue and getNonRegisterValue. | |||
1266 | /// Create an SDValue for the given value. | |||
1267 | SDValue SelectionDAGBuilder::getValueImpl(const Value *V) { | |||
1268 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
1269 | ||||
1270 | if (const Constant *C = dyn_cast<Constant>(V)) { | |||
1271 | EVT VT = TLI.getValueType(DAG.getDataLayout(), V->getType(), true); | |||
1272 | ||||
1273 | if (const ConstantInt *CI = dyn_cast<ConstantInt>(C)) | |||
1274 | return DAG.getConstant(*CI, getCurSDLoc(), VT); | |||
1275 | ||||
1276 | if (const GlobalValue *GV = dyn_cast<GlobalValue>(C)) | |||
1277 | return DAG.getGlobalAddress(GV, getCurSDLoc(), VT); | |||
1278 | ||||
1279 | if (isa<ConstantPointerNull>(C)) { | |||
1280 | unsigned AS = V->getType()->getPointerAddressSpace(); | |||
1281 | return DAG.getConstant(0, getCurSDLoc(), | |||
1282 | TLI.getPointerTy(DAG.getDataLayout(), AS)); | |||
1283 | } | |||
1284 | ||||
1285 | if (const ConstantFP *CFP = dyn_cast<ConstantFP>(C)) | |||
1286 | return DAG.getConstantFP(*CFP, getCurSDLoc(), VT); | |||
1287 | ||||
1288 | if (isa<UndefValue>(C) && !V->getType()->isAggregateType()) | |||
1289 | return DAG.getUNDEF(VT); | |||
1290 | ||||
1291 | if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) { | |||
1292 | visit(CE->getOpcode(), *CE); | |||
1293 | SDValue N1 = NodeMap[V]; | |||
1294 | assert(N1.getNode() && "visit didn't populate the NodeMap!")((N1.getNode() && "visit didn't populate the NodeMap!" ) ? static_cast<void> (0) : __assert_fail ("N1.getNode() && \"visit didn't populate the NodeMap!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 1294, __PRETTY_FUNCTION__)); | |||
1295 | return N1; | |||
1296 | } | |||
1297 | ||||
1298 | if (isa<ConstantStruct>(C) || isa<ConstantArray>(C)) { | |||
1299 | SmallVector<SDValue, 4> Constants; | |||
1300 | for (User::const_op_iterator OI = C->op_begin(), OE = C->op_end(); | |||
1301 | OI != OE; ++OI) { | |||
1302 | SDNode *Val = getValue(*OI).getNode(); | |||
1303 | // If the operand is an empty aggregate, there are no values. | |||
1304 | if (!Val) continue; | |||
1305 | // Add each leaf value from the operand to the Constants list | |||
1306 | // to form a flattened list of all the values. | |||
1307 | for (unsigned i = 0, e = Val->getNumValues(); i != e; ++i) | |||
1308 | Constants.push_back(SDValue(Val, i)); | |||
1309 | } | |||
1310 | ||||
1311 | return DAG.getMergeValues(Constants, getCurSDLoc()); | |||
1312 | } | |||
1313 | ||||
1314 | if (const ConstantDataSequential *CDS = | |||
1315 | dyn_cast<ConstantDataSequential>(C)) { | |||
1316 | SmallVector<SDValue, 4> Ops; | |||
1317 | for (unsigned i = 0, e = CDS->getNumElements(); i != e; ++i) { | |||
1318 | SDNode *Val = getValue(CDS->getElementAsConstant(i)).getNode(); | |||
1319 | // Add each leaf value from the operand to the Constants list | |||
1320 | // to form a flattened list of all the values. | |||
1321 | for (unsigned i = 0, e = Val->getNumValues(); i != e; ++i) | |||
1322 | Ops.push_back(SDValue(Val, i)); | |||
1323 | } | |||
1324 | ||||
1325 | if (isa<ArrayType>(CDS->getType())) | |||
1326 | return DAG.getMergeValues(Ops, getCurSDLoc()); | |||
1327 | return NodeMap[V] = DAG.getBuildVector(VT, getCurSDLoc(), Ops); | |||
1328 | } | |||
1329 | ||||
1330 | if (C->getType()->isStructTy() || C->getType()->isArrayTy()) { | |||
1331 | assert((isa<ConstantAggregateZero>(C) || isa<UndefValue>(C)) &&(((isa<ConstantAggregateZero>(C) || isa<UndefValue> (C)) && "Unknown struct or array constant!") ? static_cast <void> (0) : __assert_fail ("(isa<ConstantAggregateZero>(C) || isa<UndefValue>(C)) && \"Unknown struct or array constant!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 1332, __PRETTY_FUNCTION__)) | |||
1332 | "Unknown struct or array constant!")(((isa<ConstantAggregateZero>(C) || isa<UndefValue> (C)) && "Unknown struct or array constant!") ? static_cast <void> (0) : __assert_fail ("(isa<ConstantAggregateZero>(C) || isa<UndefValue>(C)) && \"Unknown struct or array constant!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 1332, __PRETTY_FUNCTION__)); | |||
1333 | ||||
1334 | SmallVector<EVT, 4> ValueVTs; | |||
1335 | ComputeValueVTs(TLI, DAG.getDataLayout(), C->getType(), ValueVTs); | |||
1336 | unsigned NumElts = ValueVTs.size(); | |||
1337 | if (NumElts == 0) | |||
1338 | return SDValue(); // empty struct | |||
1339 | SmallVector<SDValue, 4> Constants(NumElts); | |||
1340 | for (unsigned i = 0; i != NumElts; ++i) { | |||
1341 | EVT EltVT = ValueVTs[i]; | |||
1342 | if (isa<UndefValue>(C)) | |||
1343 | Constants[i] = DAG.getUNDEF(EltVT); | |||
1344 | else if (EltVT.isFloatingPoint()) | |||
1345 | Constants[i] = DAG.getConstantFP(0, getCurSDLoc(), EltVT); | |||
1346 | else | |||
1347 | Constants[i] = DAG.getConstant(0, getCurSDLoc(), EltVT); | |||
1348 | } | |||
1349 | ||||
1350 | return DAG.getMergeValues(Constants, getCurSDLoc()); | |||
1351 | } | |||
1352 | ||||
1353 | if (const BlockAddress *BA = dyn_cast<BlockAddress>(C)) | |||
1354 | return DAG.getBlockAddress(BA, VT); | |||
1355 | ||||
1356 | VectorType *VecTy = cast<VectorType>(V->getType()); | |||
1357 | unsigned NumElements = VecTy->getNumElements(); | |||
1358 | ||||
1359 | // Now that we know the number and type of the elements, get that number of | |||
1360 | // elements into the Ops array based on what kind of constant it is. | |||
1361 | SmallVector<SDValue, 16> Ops; | |||
1362 | if (const ConstantVector *CV = dyn_cast<ConstantVector>(C)) { | |||
1363 | for (unsigned i = 0; i != NumElements; ++i) | |||
1364 | Ops.push_back(getValue(CV->getOperand(i))); | |||
1365 | } else { | |||
1366 | assert(isa<ConstantAggregateZero>(C) && "Unknown vector constant!")((isa<ConstantAggregateZero>(C) && "Unknown vector constant!" ) ? static_cast<void> (0) : __assert_fail ("isa<ConstantAggregateZero>(C) && \"Unknown vector constant!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 1366, __PRETTY_FUNCTION__)); | |||
1367 | EVT EltVT = | |||
1368 | TLI.getValueType(DAG.getDataLayout(), VecTy->getElementType()); | |||
1369 | ||||
1370 | SDValue Op; | |||
1371 | if (EltVT.isFloatingPoint()) | |||
1372 | Op = DAG.getConstantFP(0, getCurSDLoc(), EltVT); | |||
1373 | else | |||
1374 | Op = DAG.getConstant(0, getCurSDLoc(), EltVT); | |||
1375 | Ops.assign(NumElements, Op); | |||
1376 | } | |||
1377 | ||||
1378 | // Create a BUILD_VECTOR node. | |||
1379 | return NodeMap[V] = DAG.getBuildVector(VT, getCurSDLoc(), Ops); | |||
1380 | } | |||
1381 | ||||
1382 | // If this is a static alloca, generate it as the frameindex instead of | |||
1383 | // computation. | |||
1384 | if (const AllocaInst *AI = dyn_cast<AllocaInst>(V)) { | |||
1385 | DenseMap<const AllocaInst*, int>::iterator SI = | |||
1386 | FuncInfo.StaticAllocaMap.find(AI); | |||
1387 | if (SI != FuncInfo.StaticAllocaMap.end()) | |||
1388 | return DAG.getFrameIndex(SI->second, | |||
1389 | TLI.getFrameIndexTy(DAG.getDataLayout())); | |||
1390 | } | |||
1391 | ||||
1392 | // If this is an instruction which fast-isel has deferred, select it now. | |||
1393 | if (const Instruction *Inst = dyn_cast<Instruction>(V)) { | |||
1394 | unsigned InReg = FuncInfo.InitializeRegForValue(Inst); | |||
1395 | ||||
1396 | RegsForValue RFV(*DAG.getContext(), TLI, DAG.getDataLayout(), InReg, | |||
1397 | Inst->getType(), getABIRegCopyCC(V)); | |||
1398 | SDValue Chain = DAG.getEntryNode(); | |||
1399 | return RFV.getCopyFromRegs(DAG, FuncInfo, getCurSDLoc(), Chain, nullptr, V); | |||
1400 | } | |||
1401 | ||||
1402 | llvm_unreachable("Can't get register for value!")::llvm::llvm_unreachable_internal("Can't get register for value!" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 1402); | |||
1403 | } | |||
1404 | ||||
1405 | void SelectionDAGBuilder::visitCatchPad(const CatchPadInst &I) { | |||
1406 | auto Pers = classifyEHPersonality(FuncInfo.Fn->getPersonalityFn()); | |||
1407 | bool IsMSVCCXX = Pers == EHPersonality::MSVC_CXX; | |||
1408 | bool IsCoreCLR = Pers == EHPersonality::CoreCLR; | |||
1409 | bool IsSEH = isAsynchronousEHPersonality(Pers); | |||
1410 | bool IsWasmCXX = Pers == EHPersonality::Wasm_CXX; | |||
1411 | MachineBasicBlock *CatchPadMBB = FuncInfo.MBB; | |||
1412 | if (!IsSEH) | |||
1413 | CatchPadMBB->setIsEHScopeEntry(); | |||
1414 | // In MSVC C++ and CoreCLR, catchblocks are funclets and need prologues. | |||
1415 | if (IsMSVCCXX || IsCoreCLR) | |||
1416 | CatchPadMBB->setIsEHFuncletEntry(); | |||
1417 | // Wasm does not need catchpads anymore | |||
1418 | if (!IsWasmCXX) | |||
1419 | DAG.setRoot(DAG.getNode(ISD::CATCHPAD, getCurSDLoc(), MVT::Other, | |||
1420 | getControlRoot())); | |||
1421 | } | |||
1422 | ||||
1423 | void SelectionDAGBuilder::visitCatchRet(const CatchReturnInst &I) { | |||
1424 | // Update machine-CFG edge. | |||
1425 | MachineBasicBlock *TargetMBB = FuncInfo.MBBMap[I.getSuccessor()]; | |||
1426 | FuncInfo.MBB->addSuccessor(TargetMBB); | |||
1427 | ||||
1428 | auto Pers = classifyEHPersonality(FuncInfo.Fn->getPersonalityFn()); | |||
1429 | bool IsSEH = isAsynchronousEHPersonality(Pers); | |||
1430 | if (IsSEH) { | |||
1431 | // If this is not a fall-through branch or optimizations are switched off, | |||
1432 | // emit the branch. | |||
1433 | if (TargetMBB != NextBlock(FuncInfo.MBB) || | |||
1434 | TM.getOptLevel() == CodeGenOpt::None) | |||
1435 | DAG.setRoot(DAG.getNode(ISD::BR, getCurSDLoc(), MVT::Other, | |||
1436 | getControlRoot(), DAG.getBasicBlock(TargetMBB))); | |||
1437 | return; | |||
1438 | } | |||
1439 | ||||
1440 | // Figure out the funclet membership for the catchret's successor. | |||
1441 | // This will be used by the FuncletLayout pass to determine how to order the | |||
1442 | // BB's. | |||
1443 | // A 'catchret' returns to the outer scope's color. | |||
1444 | Value *ParentPad = I.getCatchSwitchParentPad(); | |||
1445 | const BasicBlock *SuccessorColor; | |||
1446 | if (isa<ConstantTokenNone>(ParentPad)) | |||
1447 | SuccessorColor = &FuncInfo.Fn->getEntryBlock(); | |||
1448 | else | |||
1449 | SuccessorColor = cast<Instruction>(ParentPad)->getParent(); | |||
1450 | assert(SuccessorColor && "No parent funclet for catchret!")((SuccessorColor && "No parent funclet for catchret!" ) ? static_cast<void> (0) : __assert_fail ("SuccessorColor && \"No parent funclet for catchret!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 1450, __PRETTY_FUNCTION__)); | |||
1451 | MachineBasicBlock *SuccessorColorMBB = FuncInfo.MBBMap[SuccessorColor]; | |||
1452 | assert(SuccessorColorMBB && "No MBB for SuccessorColor!")((SuccessorColorMBB && "No MBB for SuccessorColor!") ? static_cast<void> (0) : __assert_fail ("SuccessorColorMBB && \"No MBB for SuccessorColor!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 1452, __PRETTY_FUNCTION__)); | |||
1453 | ||||
1454 | // Create the terminator node. | |||
1455 | SDValue Ret = DAG.getNode(ISD::CATCHRET, getCurSDLoc(), MVT::Other, | |||
1456 | getControlRoot(), DAG.getBasicBlock(TargetMBB), | |||
1457 | DAG.getBasicBlock(SuccessorColorMBB)); | |||
1458 | DAG.setRoot(Ret); | |||
1459 | } | |||
1460 | ||||
1461 | void SelectionDAGBuilder::visitCleanupPad(const CleanupPadInst &CPI) { | |||
1462 | // Don't emit any special code for the cleanuppad instruction. It just marks | |||
1463 | // the start of an EH scope/funclet. | |||
1464 | FuncInfo.MBB->setIsEHScopeEntry(); | |||
1465 | auto Pers = classifyEHPersonality(FuncInfo.Fn->getPersonalityFn()); | |||
1466 | if (Pers != EHPersonality::Wasm_CXX) { | |||
1467 | FuncInfo.MBB->setIsEHFuncletEntry(); | |||
1468 | FuncInfo.MBB->setIsCleanupFuncletEntry(); | |||
1469 | } | |||
1470 | } | |||
1471 | ||||
1472 | /// When an invoke or a cleanupret unwinds to the next EH pad, there are | |||
1473 | /// many places it could ultimately go. In the IR, we have a single unwind | |||
1474 | /// destination, but in the machine CFG, we enumerate all the possible blocks. | |||
1475 | /// This function skips over imaginary basic blocks that hold catchswitch | |||
1476 | /// instructions, and finds all the "real" machine | |||
1477 | /// basic block destinations. As those destinations may not be successors of | |||
1478 | /// EHPadBB, here we also calculate the edge probability to those destinations. | |||
1479 | /// The passed-in Prob is the edge probability to EHPadBB. | |||
1480 | static void findUnwindDestinations( | |||
1481 | FunctionLoweringInfo &FuncInfo, const BasicBlock *EHPadBB, | |||
1482 | BranchProbability Prob, | |||
1483 | SmallVectorImpl<std::pair<MachineBasicBlock *, BranchProbability>> | |||
1484 | &UnwindDests) { | |||
1485 | EHPersonality Personality = | |||
1486 | classifyEHPersonality(FuncInfo.Fn->getPersonalityFn()); | |||
1487 | bool IsMSVCCXX = Personality == EHPersonality::MSVC_CXX; | |||
1488 | bool IsCoreCLR = Personality == EHPersonality::CoreCLR; | |||
1489 | bool IsWasmCXX = Personality == EHPersonality::Wasm_CXX; | |||
1490 | bool IsSEH = isAsynchronousEHPersonality(Personality); | |||
1491 | ||||
1492 | while (EHPadBB) { | |||
1493 | const Instruction *Pad = EHPadBB->getFirstNonPHI(); | |||
1494 | BasicBlock *NewEHPadBB = nullptr; | |||
1495 | if (isa<LandingPadInst>(Pad)) { | |||
1496 | // Stop on landingpads. They are not funclets. | |||
1497 | UnwindDests.emplace_back(FuncInfo.MBBMap[EHPadBB], Prob); | |||
1498 | break; | |||
1499 | } else if (isa<CleanupPadInst>(Pad)) { | |||
1500 | // Stop on cleanup pads. Cleanups are always funclet entries for all known | |||
1501 | // personalities. | |||
1502 | UnwindDests.emplace_back(FuncInfo.MBBMap[EHPadBB], Prob); | |||
1503 | UnwindDests.back().first->setIsEHScopeEntry(); | |||
1504 | if (!IsWasmCXX) | |||
1505 | UnwindDests.back().first->setIsEHFuncletEntry(); | |||
1506 | break; | |||
1507 | } else if (auto *CatchSwitch = dyn_cast<CatchSwitchInst>(Pad)) { | |||
1508 | // Add the catchpad handlers to the possible destinations. | |||
1509 | for (const BasicBlock *CatchPadBB : CatchSwitch->handlers()) { | |||
1510 | UnwindDests.emplace_back(FuncInfo.MBBMap[CatchPadBB], Prob); | |||
1511 | // For MSVC++ and the CLR, catchblocks are funclets and need prologues. | |||
1512 | if (IsMSVCCXX || IsCoreCLR) | |||
1513 | UnwindDests.back().first->setIsEHFuncletEntry(); | |||
1514 | if (!IsSEH) | |||
1515 | UnwindDests.back().first->setIsEHScopeEntry(); | |||
1516 | } | |||
1517 | NewEHPadBB = CatchSwitch->getUnwindDest(); | |||
1518 | } else { | |||
1519 | continue; | |||
1520 | } | |||
1521 | ||||
1522 | BranchProbabilityInfo *BPI = FuncInfo.BPI; | |||
1523 | if (BPI && NewEHPadBB) | |||
1524 | Prob *= BPI->getEdgeProbability(EHPadBB, NewEHPadBB); | |||
1525 | EHPadBB = NewEHPadBB; | |||
1526 | } | |||
1527 | } | |||
1528 | ||||
1529 | void SelectionDAGBuilder::visitCleanupRet(const CleanupReturnInst &I) { | |||
1530 | // Update successor info. | |||
1531 | SmallVector<std::pair<MachineBasicBlock *, BranchProbability>, 1> UnwindDests; | |||
1532 | auto UnwindDest = I.getUnwindDest(); | |||
1533 | BranchProbabilityInfo *BPI = FuncInfo.BPI; | |||
1534 | BranchProbability UnwindDestProb = | |||
1535 | (BPI && UnwindDest) | |||
1536 | ? BPI->getEdgeProbability(FuncInfo.MBB->getBasicBlock(), UnwindDest) | |||
1537 | : BranchProbability::getZero(); | |||
1538 | findUnwindDestinations(FuncInfo, UnwindDest, UnwindDestProb, UnwindDests); | |||
1539 | for (auto &UnwindDest : UnwindDests) { | |||
1540 | UnwindDest.first->setIsEHPad(); | |||
1541 | addSuccessorWithProb(FuncInfo.MBB, UnwindDest.first, UnwindDest.second); | |||
1542 | } | |||
1543 | FuncInfo.MBB->normalizeSuccProbs(); | |||
1544 | ||||
1545 | // Create the terminator node. | |||
1546 | SDValue Ret = | |||
1547 | DAG.getNode(ISD::CLEANUPRET, getCurSDLoc(), MVT::Other, getControlRoot()); | |||
1548 | DAG.setRoot(Ret); | |||
1549 | } | |||
1550 | ||||
1551 | void SelectionDAGBuilder::visitCatchSwitch(const CatchSwitchInst &CSI) { | |||
1552 | report_fatal_error("visitCatchSwitch not yet implemented!"); | |||
1553 | } | |||
1554 | ||||
1555 | void SelectionDAGBuilder::visitRet(const ReturnInst &I) { | |||
1556 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
1557 | auto &DL = DAG.getDataLayout(); | |||
1558 | SDValue Chain = getControlRoot(); | |||
1559 | SmallVector<ISD::OutputArg, 8> Outs; | |||
1560 | SmallVector<SDValue, 8> OutVals; | |||
1561 | ||||
1562 | // Calls to @llvm.experimental.deoptimize don't generate a return value, so | |||
1563 | // lower | |||
1564 | // | |||
1565 | // %val = call <ty> @llvm.experimental.deoptimize() | |||
1566 | // ret <ty> %val | |||
1567 | // | |||
1568 | // differently. | |||
1569 | if (I.getParent()->getTerminatingDeoptimizeCall()) { | |||
1570 | LowerDeoptimizingReturn(); | |||
1571 | return; | |||
1572 | } | |||
1573 | ||||
1574 | if (!FuncInfo.CanLowerReturn) { | |||
1575 | unsigned DemoteReg = FuncInfo.DemoteRegister; | |||
1576 | const Function *F = I.getParent()->getParent(); | |||
1577 | ||||
1578 | // Emit a store of the return value through the virtual register. | |||
1579 | // Leave Outs empty so that LowerReturn won't try to load return | |||
1580 | // registers the usual way. | |||
1581 | SmallVector<EVT, 1> PtrValueVTs; | |||
1582 | ComputeValueVTs(TLI, DL, | |||
1583 | F->getReturnType()->getPointerTo( | |||
1584 | DAG.getDataLayout().getAllocaAddrSpace()), | |||
1585 | PtrValueVTs); | |||
1586 | ||||
1587 | SDValue RetPtr = DAG.getCopyFromReg(DAG.getEntryNode(), getCurSDLoc(), | |||
1588 | DemoteReg, PtrValueVTs[0]); | |||
1589 | SDValue RetOp = getValue(I.getOperand(0)); | |||
1590 | ||||
1591 | SmallVector<EVT, 4> ValueVTs; | |||
1592 | SmallVector<uint64_t, 4> Offsets; | |||
1593 | ComputeValueVTs(TLI, DL, I.getOperand(0)->getType(), ValueVTs, &Offsets); | |||
1594 | unsigned NumValues = ValueVTs.size(); | |||
1595 | ||||
1596 | SmallVector<SDValue, 4> Chains(NumValues); | |||
1597 | for (unsigned i = 0; i != NumValues; ++i) { | |||
1598 | // An aggregate return value cannot wrap around the address space, so | |||
1599 | // offsets to its parts don't wrap either. | |||
1600 | SDValue Ptr = DAG.getObjectPtrOffset(getCurSDLoc(), RetPtr, Offsets[i]); | |||
1601 | Chains[i] = DAG.getStore( | |||
1602 | Chain, getCurSDLoc(), SDValue(RetOp.getNode(), RetOp.getResNo() + i), | |||
1603 | // FIXME: better loc info would be nice. | |||
1604 | Ptr, MachinePointerInfo::getUnknownStack(DAG.getMachineFunction())); | |||
1605 | } | |||
1606 | ||||
1607 | Chain = DAG.getNode(ISD::TokenFactor, getCurSDLoc(), | |||
1608 | MVT::Other, Chains); | |||
1609 | } else if (I.getNumOperands() != 0) { | |||
1610 | SmallVector<EVT, 4> ValueVTs; | |||
1611 | ComputeValueVTs(TLI, DL, I.getOperand(0)->getType(), ValueVTs); | |||
1612 | unsigned NumValues = ValueVTs.size(); | |||
1613 | if (NumValues) { | |||
1614 | SDValue RetOp = getValue(I.getOperand(0)); | |||
1615 | ||||
1616 | const Function *F = I.getParent()->getParent(); | |||
1617 | ||||
1618 | ISD::NodeType ExtendKind = ISD::ANY_EXTEND; | |||
1619 | if (F->getAttributes().hasAttribute(AttributeList::ReturnIndex, | |||
1620 | Attribute::SExt)) | |||
1621 | ExtendKind = ISD::SIGN_EXTEND; | |||
1622 | else if (F->getAttributes().hasAttribute(AttributeList::ReturnIndex, | |||
1623 | Attribute::ZExt)) | |||
1624 | ExtendKind = ISD::ZERO_EXTEND; | |||
1625 | ||||
1626 | LLVMContext &Context = F->getContext(); | |||
1627 | bool RetInReg = F->getAttributes().hasAttribute( | |||
1628 | AttributeList::ReturnIndex, Attribute::InReg); | |||
1629 | ||||
1630 | for (unsigned j = 0; j != NumValues; ++j) { | |||
1631 | EVT VT = ValueVTs[j]; | |||
1632 | ||||
1633 | if (ExtendKind != ISD::ANY_EXTEND && VT.isInteger()) | |||
1634 | VT = TLI.getTypeForExtReturn(Context, VT, ExtendKind); | |||
1635 | ||||
1636 | CallingConv::ID CC = F->getCallingConv(); | |||
1637 | ||||
1638 | unsigned NumParts = TLI.getNumRegistersForCallingConv(Context, CC, VT); | |||
1639 | MVT PartVT = TLI.getRegisterTypeForCallingConv(Context, CC, VT); | |||
1640 | SmallVector<SDValue, 4> Parts(NumParts); | |||
1641 | getCopyToParts(DAG, getCurSDLoc(), | |||
1642 | SDValue(RetOp.getNode(), RetOp.getResNo() + j), | |||
1643 | &Parts[0], NumParts, PartVT, &I, CC, ExtendKind); | |||
1644 | ||||
1645 | // 'inreg' on function refers to return value | |||
1646 | ISD::ArgFlagsTy Flags = ISD::ArgFlagsTy(); | |||
1647 | if (RetInReg) | |||
1648 | Flags.setInReg(); | |||
1649 | ||||
1650 | // Propagate extension type if any | |||
1651 | if (ExtendKind == ISD::SIGN_EXTEND) | |||
1652 | Flags.setSExt(); | |||
1653 | else if (ExtendKind == ISD::ZERO_EXTEND) | |||
1654 | Flags.setZExt(); | |||
1655 | ||||
1656 | for (unsigned i = 0; i < NumParts; ++i) { | |||
1657 | Outs.push_back(ISD::OutputArg(Flags, Parts[i].getValueType(), | |||
1658 | VT, /*isfixed=*/true, 0, 0)); | |||
1659 | OutVals.push_back(Parts[i]); | |||
1660 | } | |||
1661 | } | |||
1662 | } | |||
1663 | } | |||
1664 | ||||
1665 | // Push in swifterror virtual register as the last element of Outs. This makes | |||
1666 | // sure swifterror virtual register will be returned in the swifterror | |||
1667 | // physical register. | |||
1668 | const Function *F = I.getParent()->getParent(); | |||
1669 | if (TLI.supportSwiftError() && | |||
1670 | F->getAttributes().hasAttrSomewhere(Attribute::SwiftError)) { | |||
1671 | assert(FuncInfo.SwiftErrorArg && "Need a swift error argument")((FuncInfo.SwiftErrorArg && "Need a swift error argument" ) ? static_cast<void> (0) : __assert_fail ("FuncInfo.SwiftErrorArg && \"Need a swift error argument\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 1671, __PRETTY_FUNCTION__)); | |||
1672 | ISD::ArgFlagsTy Flags = ISD::ArgFlagsTy(); | |||
1673 | Flags.setSwiftError(); | |||
1674 | Outs.push_back(ISD::OutputArg(Flags, EVT(TLI.getPointerTy(DL)) /*vt*/, | |||
1675 | EVT(TLI.getPointerTy(DL)) /*argvt*/, | |||
1676 | true /*isfixed*/, 1 /*origidx*/, | |||
1677 | 0 /*partOffs*/)); | |||
1678 | // Create SDNode for the swifterror virtual register. | |||
1679 | OutVals.push_back( | |||
1680 | DAG.getRegister(FuncInfo.getOrCreateSwiftErrorVRegUseAt( | |||
1681 | &I, FuncInfo.MBB, FuncInfo.SwiftErrorArg).first, | |||
1682 | EVT(TLI.getPointerTy(DL)))); | |||
1683 | } | |||
1684 | ||||
1685 | bool isVarArg = DAG.getMachineFunction().getFunction().isVarArg(); | |||
1686 | CallingConv::ID CallConv = | |||
1687 | DAG.getMachineFunction().getFunction().getCallingConv(); | |||
1688 | Chain = DAG.getTargetLoweringInfo().LowerReturn( | |||
1689 | Chain, CallConv, isVarArg, Outs, OutVals, getCurSDLoc(), DAG); | |||
1690 | ||||
1691 | // Verify that the target's LowerReturn behaved as expected. | |||
1692 | assert(Chain.getNode() && Chain.getValueType() == MVT::Other &&((Chain.getNode() && Chain.getValueType() == MVT::Other && "LowerReturn didn't return a valid chain!") ? static_cast <void> (0) : __assert_fail ("Chain.getNode() && Chain.getValueType() == MVT::Other && \"LowerReturn didn't return a valid chain!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 1693, __PRETTY_FUNCTION__)) | |||
1693 | "LowerReturn didn't return a valid chain!")((Chain.getNode() && Chain.getValueType() == MVT::Other && "LowerReturn didn't return a valid chain!") ? static_cast <void> (0) : __assert_fail ("Chain.getNode() && Chain.getValueType() == MVT::Other && \"LowerReturn didn't return a valid chain!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 1693, __PRETTY_FUNCTION__)); | |||
1694 | ||||
1695 | // Update the DAG with the new chain value resulting from return lowering. | |||
1696 | DAG.setRoot(Chain); | |||
1697 | } | |||
1698 | ||||
1699 | /// CopyToExportRegsIfNeeded - If the given value has virtual registers | |||
1700 | /// created for it, emit nodes to copy the value into the virtual | |||
1701 | /// registers. | |||
1702 | void SelectionDAGBuilder::CopyToExportRegsIfNeeded(const Value *V) { | |||
1703 | // Skip empty types | |||
1704 | if (V->getType()->isEmptyTy()) | |||
1705 | return; | |||
1706 | ||||
1707 | DenseMap<const Value *, unsigned>::iterator VMI = FuncInfo.ValueMap.find(V); | |||
1708 | if (VMI != FuncInfo.ValueMap.end()) { | |||
1709 | assert(!V->use_empty() && "Unused value assigned virtual registers!")((!V->use_empty() && "Unused value assigned virtual registers!" ) ? static_cast<void> (0) : __assert_fail ("!V->use_empty() && \"Unused value assigned virtual registers!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 1709, __PRETTY_FUNCTION__)); | |||
1710 | CopyValueToVirtualRegister(V, VMI->second); | |||
1711 | } | |||
1712 | } | |||
1713 | ||||
1714 | /// ExportFromCurrentBlock - If this condition isn't known to be exported from | |||
1715 | /// the current basic block, add it to ValueMap now so that we'll get a | |||
1716 | /// CopyTo/FromReg. | |||
1717 | void SelectionDAGBuilder::ExportFromCurrentBlock(const Value *V) { | |||
1718 | // No need to export constants. | |||
1719 | if (!isa<Instruction>(V) && !isa<Argument>(V)) return; | |||
1720 | ||||
1721 | // Already exported? | |||
1722 | if (FuncInfo.isExportedInst(V)) return; | |||
1723 | ||||
1724 | unsigned Reg = FuncInfo.InitializeRegForValue(V); | |||
1725 | CopyValueToVirtualRegister(V, Reg); | |||
1726 | } | |||
1727 | ||||
1728 | bool SelectionDAGBuilder::isExportableFromCurrentBlock(const Value *V, | |||
1729 | const BasicBlock *FromBB) { | |||
1730 | // The operands of the setcc have to be in this block. We don't know | |||
1731 | // how to export them from some other block. | |||
1732 | if (const Instruction *VI = dyn_cast<Instruction>(V)) { | |||
1733 | // Can export from current BB. | |||
1734 | if (VI->getParent() == FromBB) | |||
1735 | return true; | |||
1736 | ||||
1737 | // Is already exported, noop. | |||
1738 | return FuncInfo.isExportedInst(V); | |||
1739 | } | |||
1740 | ||||
1741 | // If this is an argument, we can export it if the BB is the entry block or | |||
1742 | // if it is already exported. | |||
1743 | if (isa<Argument>(V)) { | |||
1744 | if (FromBB == &FromBB->getParent()->getEntryBlock()) | |||
1745 | return true; | |||
1746 | ||||
1747 | // Otherwise, can only export this if it is already exported. | |||
1748 | return FuncInfo.isExportedInst(V); | |||
1749 | } | |||
1750 | ||||
1751 | // Otherwise, constants can always be exported. | |||
1752 | return true; | |||
1753 | } | |||
1754 | ||||
1755 | /// Return branch probability calculated by BranchProbabilityInfo for IR blocks. | |||
1756 | BranchProbability | |||
1757 | SelectionDAGBuilder::getEdgeProbability(const MachineBasicBlock *Src, | |||
1758 | const MachineBasicBlock *Dst) const { | |||
1759 | BranchProbabilityInfo *BPI = FuncInfo.BPI; | |||
1760 | const BasicBlock *SrcBB = Src->getBasicBlock(); | |||
1761 | const BasicBlock *DstBB = Dst->getBasicBlock(); | |||
1762 | if (!BPI) { | |||
1763 | // If BPI is not available, set the default probability as 1 / N, where N is | |||
1764 | // the number of successors. | |||
1765 | auto SuccSize = std::max<uint32_t>(succ_size(SrcBB), 1); | |||
1766 | return BranchProbability(1, SuccSize); | |||
1767 | } | |||
1768 | return BPI->getEdgeProbability(SrcBB, DstBB); | |||
1769 | } | |||
1770 | ||||
1771 | void SelectionDAGBuilder::addSuccessorWithProb(MachineBasicBlock *Src, | |||
1772 | MachineBasicBlock *Dst, | |||
1773 | BranchProbability Prob) { | |||
1774 | if (!FuncInfo.BPI) | |||
1775 | Src->addSuccessorWithoutProb(Dst); | |||
1776 | else { | |||
1777 | if (Prob.isUnknown()) | |||
1778 | Prob = getEdgeProbability(Src, Dst); | |||
1779 | Src->addSuccessor(Dst, Prob); | |||
1780 | } | |||
1781 | } | |||
1782 | ||||
1783 | static bool InBlock(const Value *V, const BasicBlock *BB) { | |||
1784 | if (const Instruction *I = dyn_cast<Instruction>(V)) | |||
1785 | return I->getParent() == BB; | |||
1786 | return true; | |||
1787 | } | |||
1788 | ||||
1789 | /// EmitBranchForMergedCondition - Helper method for FindMergedConditions. | |||
1790 | /// This function emits a branch and is used at the leaves of an OR or an | |||
1791 | /// AND operator tree. | |||
1792 | void | |||
1793 | SelectionDAGBuilder::EmitBranchForMergedCondition(const Value *Cond, | |||
1794 | MachineBasicBlock *TBB, | |||
1795 | MachineBasicBlock *FBB, | |||
1796 | MachineBasicBlock *CurBB, | |||
1797 | MachineBasicBlock *SwitchBB, | |||
1798 | BranchProbability TProb, | |||
1799 | BranchProbability FProb, | |||
1800 | bool InvertCond) { | |||
1801 | const BasicBlock *BB = CurBB->getBasicBlock(); | |||
1802 | ||||
1803 | // If the leaf of the tree is a comparison, merge the condition into | |||
1804 | // the caseblock. | |||
1805 | if (const CmpInst *BOp = dyn_cast<CmpInst>(Cond)) { | |||
1806 | // The operands of the cmp have to be in this block. We don't know | |||
1807 | // how to export them from some other block. If this is the first block | |||
1808 | // of the sequence, no exporting is needed. | |||
1809 | if (CurBB == SwitchBB || | |||
1810 | (isExportableFromCurrentBlock(BOp->getOperand(0), BB) && | |||
1811 | isExportableFromCurrentBlock(BOp->getOperand(1), BB))) { | |||
1812 | ISD::CondCode Condition; | |||
1813 | if (const ICmpInst *IC = dyn_cast<ICmpInst>(Cond)) { | |||
1814 | ICmpInst::Predicate Pred = | |||
1815 | InvertCond ? IC->getInversePredicate() : IC->getPredicate(); | |||
1816 | Condition = getICmpCondCode(Pred); | |||
1817 | } else { | |||
1818 | const FCmpInst *FC = cast<FCmpInst>(Cond); | |||
1819 | FCmpInst::Predicate Pred = | |||
1820 | InvertCond ? FC->getInversePredicate() : FC->getPredicate(); | |||
1821 | Condition = getFCmpCondCode(Pred); | |||
1822 | if (TM.Options.NoNaNsFPMath) | |||
1823 | Condition = getFCmpCodeWithoutNaN(Condition); | |||
1824 | } | |||
1825 | ||||
1826 | CaseBlock CB(Condition, BOp->getOperand(0), BOp->getOperand(1), nullptr, | |||
1827 | TBB, FBB, CurBB, getCurSDLoc(), TProb, FProb); | |||
1828 | SwitchCases.push_back(CB); | |||
1829 | return; | |||
1830 | } | |||
1831 | } | |||
1832 | ||||
1833 | // Create a CaseBlock record representing this branch. | |||
1834 | ISD::CondCode Opc = InvertCond ? ISD::SETNE : ISD::SETEQ; | |||
1835 | CaseBlock CB(Opc, Cond, ConstantInt::getTrue(*DAG.getContext()), | |||
1836 | nullptr, TBB, FBB, CurBB, getCurSDLoc(), TProb, FProb); | |||
1837 | SwitchCases.push_back(CB); | |||
1838 | } | |||
1839 | ||||
1840 | void SelectionDAGBuilder::FindMergedConditions(const Value *Cond, | |||
1841 | MachineBasicBlock *TBB, | |||
1842 | MachineBasicBlock *FBB, | |||
1843 | MachineBasicBlock *CurBB, | |||
1844 | MachineBasicBlock *SwitchBB, | |||
1845 | Instruction::BinaryOps Opc, | |||
1846 | BranchProbability TProb, | |||
1847 | BranchProbability FProb, | |||
1848 | bool InvertCond) { | |||
1849 | // Skip over not part of the tree and remember to invert op and operands at | |||
1850 | // next level. | |||
1851 | Value *NotCond; | |||
1852 | if (match(Cond, m_OneUse(m_Not(m_Value(NotCond)))) && | |||
1853 | InBlock(NotCond, CurBB->getBasicBlock())) { | |||
1854 | FindMergedConditions(NotCond, TBB, FBB, CurBB, SwitchBB, Opc, TProb, FProb, | |||
1855 | !InvertCond); | |||
1856 | return; | |||
1857 | } | |||
1858 | ||||
1859 | const Instruction *BOp = dyn_cast<Instruction>(Cond); | |||
1860 | // Compute the effective opcode for Cond, taking into account whether it needs | |||
1861 | // to be inverted, e.g. | |||
1862 | // and (not (or A, B)), C | |||
1863 | // gets lowered as | |||
1864 | // and (and (not A, not B), C) | |||
1865 | unsigned BOpc = 0; | |||
1866 | if (BOp) { | |||
1867 | BOpc = BOp->getOpcode(); | |||
1868 | if (InvertCond) { | |||
1869 | if (BOpc == Instruction::And) | |||
1870 | BOpc = Instruction::Or; | |||
1871 | else if (BOpc == Instruction::Or) | |||
1872 | BOpc = Instruction::And; | |||
1873 | } | |||
1874 | } | |||
1875 | ||||
1876 | // If this node is not part of the or/and tree, emit it as a branch. | |||
1877 | if (!BOp || !(isa<BinaryOperator>(BOp) || isa<CmpInst>(BOp)) || | |||
1878 | BOpc != unsigned(Opc) || !BOp->hasOneUse() || | |||
1879 | BOp->getParent() != CurBB->getBasicBlock() || | |||
1880 | !InBlock(BOp->getOperand(0), CurBB->getBasicBlock()) || | |||
1881 | !InBlock(BOp->getOperand(1), CurBB->getBasicBlock())) { | |||
1882 | EmitBranchForMergedCondition(Cond, TBB, FBB, CurBB, SwitchBB, | |||
1883 | TProb, FProb, InvertCond); | |||
1884 | return; | |||
1885 | } | |||
1886 | ||||
1887 | // Create TmpBB after CurBB. | |||
1888 | MachineFunction::iterator BBI(CurBB); | |||
1889 | MachineFunction &MF = DAG.getMachineFunction(); | |||
1890 | MachineBasicBlock *TmpBB = MF.CreateMachineBasicBlock(CurBB->getBasicBlock()); | |||
1891 | CurBB->getParent()->insert(++BBI, TmpBB); | |||
1892 | ||||
1893 | if (Opc == Instruction::Or) { | |||
1894 | // Codegen X | Y as: | |||
1895 | // BB1: | |||
1896 | // jmp_if_X TBB | |||
1897 | // jmp TmpBB | |||
1898 | // TmpBB: | |||
1899 | // jmp_if_Y TBB | |||
1900 | // jmp FBB | |||
1901 | // | |||
1902 | ||||
1903 | // We have flexibility in setting Prob for BB1 and Prob for TmpBB. | |||
1904 | // The requirement is that | |||
1905 | // TrueProb for BB1 + (FalseProb for BB1 * TrueProb for TmpBB) | |||
1906 | // = TrueProb for original BB. | |||
1907 | // Assuming the original probabilities are A and B, one choice is to set | |||
1908 | // BB1's probabilities to A/2 and A/2+B, and set TmpBB's probabilities to | |||
1909 | // A/(1+B) and 2B/(1+B). This choice assumes that | |||
1910 | // TrueProb for BB1 == FalseProb for BB1 * TrueProb for TmpBB. | |||
1911 | // Another choice is to assume TrueProb for BB1 equals to TrueProb for | |||
1912 | // TmpBB, but the math is more complicated. | |||
1913 | ||||
1914 | auto NewTrueProb = TProb / 2; | |||
1915 | auto NewFalseProb = TProb / 2 + FProb; | |||
1916 | // Emit the LHS condition. | |||
1917 | FindMergedConditions(BOp->getOperand(0), TBB, TmpBB, CurBB, SwitchBB, Opc, | |||
1918 | NewTrueProb, NewFalseProb, InvertCond); | |||
1919 | ||||
1920 | // Normalize A/2 and B to get A/(1+B) and 2B/(1+B). | |||
1921 | SmallVector<BranchProbability, 2> Probs{TProb / 2, FProb}; | |||
1922 | BranchProbability::normalizeProbabilities(Probs.begin(), Probs.end()); | |||
1923 | // Emit the RHS condition into TmpBB. | |||
1924 | FindMergedConditions(BOp->getOperand(1), TBB, FBB, TmpBB, SwitchBB, Opc, | |||
1925 | Probs[0], Probs[1], InvertCond); | |||
1926 | } else { | |||
1927 | assert(Opc == Instruction::And && "Unknown merge op!")((Opc == Instruction::And && "Unknown merge op!") ? static_cast <void> (0) : __assert_fail ("Opc == Instruction::And && \"Unknown merge op!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 1927, __PRETTY_FUNCTION__)); | |||
1928 | // Codegen X & Y as: | |||
1929 | // BB1: | |||
1930 | // jmp_if_X TmpBB | |||
1931 | // jmp FBB | |||
1932 | // TmpBB: | |||
1933 | // jmp_if_Y TBB | |||
1934 | // jmp FBB | |||
1935 | // | |||
1936 | // This requires creation of TmpBB after CurBB. | |||
1937 | ||||
1938 | // We have flexibility in setting Prob for BB1 and Prob for TmpBB. | |||
1939 | // The requirement is that | |||
1940 | // FalseProb for BB1 + (TrueProb for BB1 * FalseProb for TmpBB) | |||
1941 | // = FalseProb for original BB. | |||
1942 | // Assuming the original probabilities are A and B, one choice is to set | |||
1943 | // BB1's probabilities to A+B/2 and B/2, and set TmpBB's probabilities to | |||
1944 | // 2A/(1+A) and B/(1+A). This choice assumes that FalseProb for BB1 == | |||
1945 | // TrueProb for BB1 * FalseProb for TmpBB. | |||
1946 | ||||
1947 | auto NewTrueProb = TProb + FProb / 2; | |||
1948 | auto NewFalseProb = FProb / 2; | |||
1949 | // Emit the LHS condition. | |||
1950 | FindMergedConditions(BOp->getOperand(0), TmpBB, FBB, CurBB, SwitchBB, Opc, | |||
1951 | NewTrueProb, NewFalseProb, InvertCond); | |||
1952 | ||||
1953 | // Normalize A and B/2 to get 2A/(1+A) and B/(1+A). | |||
1954 | SmallVector<BranchProbability, 2> Probs{TProb, FProb / 2}; | |||
1955 | BranchProbability::normalizeProbabilities(Probs.begin(), Probs.end()); | |||
1956 | // Emit the RHS condition into TmpBB. | |||
1957 | FindMergedConditions(BOp->getOperand(1), TBB, FBB, TmpBB, SwitchBB, Opc, | |||
1958 | Probs[0], Probs[1], InvertCond); | |||
1959 | } | |||
1960 | } | |||
1961 | ||||
1962 | /// If the set of cases should be emitted as a series of branches, return true. | |||
1963 | /// If we should emit this as a bunch of and/or'd together conditions, return | |||
1964 | /// false. | |||
1965 | bool | |||
1966 | SelectionDAGBuilder::ShouldEmitAsBranches(const std::vector<CaseBlock> &Cases) { | |||
1967 | if (Cases.size() != 2) return true; | |||
1968 | ||||
1969 | // If this is two comparisons of the same values or'd or and'd together, they | |||
1970 | // will get folded into a single comparison, so don't emit two blocks. | |||
1971 | if ((Cases[0].CmpLHS == Cases[1].CmpLHS && | |||
1972 | Cases[0].CmpRHS == Cases[1].CmpRHS) || | |||
1973 | (Cases[0].CmpRHS == Cases[1].CmpLHS && | |||
1974 | Cases[0].CmpLHS == Cases[1].CmpRHS)) { | |||
1975 | return false; | |||
1976 | } | |||
1977 | ||||
1978 | // Handle: (X != null) | (Y != null) --> (X|Y) != 0 | |||
1979 | // Handle: (X == null) & (Y == null) --> (X|Y) == 0 | |||
1980 | if (Cases[0].CmpRHS == Cases[1].CmpRHS && | |||
1981 | Cases[0].CC == Cases[1].CC && | |||
1982 | isa<Constant>(Cases[0].CmpRHS) && | |||
1983 | cast<Constant>(Cases[0].CmpRHS)->isNullValue()) { | |||
1984 | if (Cases[0].CC == ISD::SETEQ && Cases[0].TrueBB == Cases[1].ThisBB) | |||
1985 | return false; | |||
1986 | if (Cases[0].CC == ISD::SETNE && Cases[0].FalseBB == Cases[1].ThisBB) | |||
1987 | return false; | |||
1988 | } | |||
1989 | ||||
1990 | return true; | |||
1991 | } | |||
1992 | ||||
1993 | void SelectionDAGBuilder::visitBr(const BranchInst &I) { | |||
1994 | MachineBasicBlock *BrMBB = FuncInfo.MBB; | |||
1995 | ||||
1996 | // Update machine-CFG edges. | |||
1997 | MachineBasicBlock *Succ0MBB = FuncInfo.MBBMap[I.getSuccessor(0)]; | |||
1998 | ||||
1999 | if (I.isUnconditional()) { | |||
2000 | // Update machine-CFG edges. | |||
2001 | BrMBB->addSuccessor(Succ0MBB); | |||
2002 | ||||
2003 | // If this is not a fall-through branch or optimizations are switched off, | |||
2004 | // emit the branch. | |||
2005 | if (Succ0MBB != NextBlock(BrMBB) || TM.getOptLevel() == CodeGenOpt::None) | |||
2006 | DAG.setRoot(DAG.getNode(ISD::BR, getCurSDLoc(), | |||
2007 | MVT::Other, getControlRoot(), | |||
2008 | DAG.getBasicBlock(Succ0MBB))); | |||
2009 | ||||
2010 | return; | |||
2011 | } | |||
2012 | ||||
2013 | // If this condition is one of the special cases we handle, do special stuff | |||
2014 | // now. | |||
2015 | const Value *CondVal = I.getCondition(); | |||
2016 | MachineBasicBlock *Succ1MBB = FuncInfo.MBBMap[I.getSuccessor(1)]; | |||
2017 | ||||
2018 | // If this is a series of conditions that are or'd or and'd together, emit | |||
2019 | // this as a sequence of branches instead of setcc's with and/or operations. | |||
2020 | // As long as jumps are not expensive, this should improve performance. | |||
2021 | // For example, instead of something like: | |||
2022 | // cmp A, B | |||
2023 | // C = seteq | |||
2024 | // cmp D, E | |||
2025 | // F = setle | |||
2026 | // or C, F | |||
2027 | // jnz foo | |||
2028 | // Emit: | |||
2029 | // cmp A, B | |||
2030 | // je foo | |||
2031 | // cmp D, E | |||
2032 | // jle foo | |||
2033 | if (const BinaryOperator *BOp = dyn_cast<BinaryOperator>(CondVal)) { | |||
2034 | Instruction::BinaryOps Opcode = BOp->getOpcode(); | |||
2035 | if (!DAG.getTargetLoweringInfo().isJumpExpensive() && BOp->hasOneUse() && | |||
2036 | !I.getMetadata(LLVMContext::MD_unpredictable) && | |||
2037 | (Opcode == Instruction::And || Opcode == Instruction::Or)) { | |||
2038 | FindMergedConditions(BOp, Succ0MBB, Succ1MBB, BrMBB, BrMBB, | |||
2039 | Opcode, | |||
2040 | getEdgeProbability(BrMBB, Succ0MBB), | |||
2041 | getEdgeProbability(BrMBB, Succ1MBB), | |||
2042 | /*InvertCond=*/false); | |||
2043 | // If the compares in later blocks need to use values not currently | |||
2044 | // exported from this block, export them now. This block should always | |||
2045 | // be the first entry. | |||
2046 | assert(SwitchCases[0].ThisBB == BrMBB && "Unexpected lowering!")((SwitchCases[0].ThisBB == BrMBB && "Unexpected lowering!" ) ? static_cast<void> (0) : __assert_fail ("SwitchCases[0].ThisBB == BrMBB && \"Unexpected lowering!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 2046, __PRETTY_FUNCTION__)); | |||
2047 | ||||
2048 | // Allow some cases to be rejected. | |||
2049 | if (ShouldEmitAsBranches(SwitchCases)) { | |||
2050 | for (unsigned i = 1, e = SwitchCases.size(); i != e; ++i) { | |||
2051 | ExportFromCurrentBlock(SwitchCases[i].CmpLHS); | |||
2052 | ExportFromCurrentBlock(SwitchCases[i].CmpRHS); | |||
2053 | } | |||
2054 | ||||
2055 | // Emit the branch for this block. | |||
2056 | visitSwitchCase(SwitchCases[0], BrMBB); | |||
2057 | SwitchCases.erase(SwitchCases.begin()); | |||
2058 | return; | |||
2059 | } | |||
2060 | ||||
2061 | // Okay, we decided not to do this, remove any inserted MBB's and clear | |||
2062 | // SwitchCases. | |||
2063 | for (unsigned i = 1, e = SwitchCases.size(); i != e; ++i) | |||
2064 | FuncInfo.MF->erase(SwitchCases[i].ThisBB); | |||
2065 | ||||
2066 | SwitchCases.clear(); | |||
2067 | } | |||
2068 | } | |||
2069 | ||||
2070 | // Create a CaseBlock record representing this branch. | |||
2071 | CaseBlock CB(ISD::SETEQ, CondVal, ConstantInt::getTrue(*DAG.getContext()), | |||
2072 | nullptr, Succ0MBB, Succ1MBB, BrMBB, getCurSDLoc()); | |||
2073 | ||||
2074 | // Use visitSwitchCase to actually insert the fast branch sequence for this | |||
2075 | // cond branch. | |||
2076 | visitSwitchCase(CB, BrMBB); | |||
2077 | } | |||
2078 | ||||
2079 | /// visitSwitchCase - Emits the necessary code to represent a single node in | |||
2080 | /// the binary search tree resulting from lowering a switch instruction. | |||
2081 | void SelectionDAGBuilder::visitSwitchCase(CaseBlock &CB, | |||
2082 | MachineBasicBlock *SwitchBB) { | |||
2083 | SDValue Cond; | |||
2084 | SDValue CondLHS = getValue(CB.CmpLHS); | |||
2085 | SDLoc dl = CB.DL; | |||
2086 | ||||
2087 | // Build the setcc now. | |||
2088 | if (!CB.CmpMHS) { | |||
2089 | // Fold "(X == true)" to X and "(X == false)" to !X to | |||
2090 | // handle common cases produced by branch lowering. | |||
2091 | if (CB.CmpRHS == ConstantInt::getTrue(*DAG.getContext()) && | |||
2092 | CB.CC == ISD::SETEQ) | |||
2093 | Cond = CondLHS; | |||
2094 | else if (CB.CmpRHS == ConstantInt::getFalse(*DAG.getContext()) && | |||
2095 | CB.CC == ISD::SETEQ) { | |||
2096 | SDValue True = DAG.getConstant(1, dl, CondLHS.getValueType()); | |||
2097 | Cond = DAG.getNode(ISD::XOR, dl, CondLHS.getValueType(), CondLHS, True); | |||
2098 | } else | |||
2099 | Cond = DAG.getSetCC(dl, MVT::i1, CondLHS, getValue(CB.CmpRHS), CB.CC); | |||
2100 | } else { | |||
2101 | assert(CB.CC == ISD::SETLE && "Can handle only LE ranges now")((CB.CC == ISD::SETLE && "Can handle only LE ranges now" ) ? static_cast<void> (0) : __assert_fail ("CB.CC == ISD::SETLE && \"Can handle only LE ranges now\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 2101, __PRETTY_FUNCTION__)); | |||
2102 | ||||
2103 | const APInt& Low = cast<ConstantInt>(CB.CmpLHS)->getValue(); | |||
2104 | const APInt& High = cast<ConstantInt>(CB.CmpRHS)->getValue(); | |||
2105 | ||||
2106 | SDValue CmpOp = getValue(CB.CmpMHS); | |||
2107 | EVT VT = CmpOp.getValueType(); | |||
2108 | ||||
2109 | if (cast<ConstantInt>(CB.CmpLHS)->isMinValue(true)) { | |||
2110 | Cond = DAG.getSetCC(dl, MVT::i1, CmpOp, DAG.getConstant(High, dl, VT), | |||
2111 | ISD::SETLE); | |||
2112 | } else { | |||
2113 | SDValue SUB = DAG.getNode(ISD::SUB, dl, | |||
2114 | VT, CmpOp, DAG.getConstant(Low, dl, VT)); | |||
2115 | Cond = DAG.getSetCC(dl, MVT::i1, SUB, | |||
2116 | DAG.getConstant(High-Low, dl, VT), ISD::SETULE); | |||
2117 | } | |||
2118 | } | |||
2119 | ||||
2120 | // Update successor info | |||
2121 | addSuccessorWithProb(SwitchBB, CB.TrueBB, CB.TrueProb); | |||
2122 | // TrueBB and FalseBB are always different unless the incoming IR is | |||
2123 | // degenerate. This only happens when running llc on weird IR. | |||
2124 | if (CB.TrueBB != CB.FalseBB) | |||
2125 | addSuccessorWithProb(SwitchBB, CB.FalseBB, CB.FalseProb); | |||
2126 | SwitchBB->normalizeSuccProbs(); | |||
2127 | ||||
2128 | // If the lhs block is the next block, invert the condition so that we can | |||
2129 | // fall through to the lhs instead of the rhs block. | |||
2130 | if (CB.TrueBB == NextBlock(SwitchBB)) { | |||
2131 | std::swap(CB.TrueBB, CB.FalseBB); | |||
2132 | SDValue True = DAG.getConstant(1, dl, Cond.getValueType()); | |||
2133 | Cond = DAG.getNode(ISD::XOR, dl, Cond.getValueType(), Cond, True); | |||
2134 | } | |||
2135 | ||||
2136 | SDValue BrCond = DAG.getNode(ISD::BRCOND, dl, | |||
2137 | MVT::Other, getControlRoot(), Cond, | |||
2138 | DAG.getBasicBlock(CB.TrueBB)); | |||
2139 | ||||
2140 | // Insert the false branch. Do this even if it's a fall through branch, | |||
2141 | // this makes it easier to do DAG optimizations which require inverting | |||
2142 | // the branch condition. | |||
2143 | BrCond = DAG.getNode(ISD::BR, dl, MVT::Other, BrCond, | |||
2144 | DAG.getBasicBlock(CB.FalseBB)); | |||
2145 | ||||
2146 | DAG.setRoot(BrCond); | |||
2147 | } | |||
2148 | ||||
2149 | /// visitJumpTable - Emit JumpTable node in the current MBB | |||
2150 | void SelectionDAGBuilder::visitJumpTable(JumpTable &JT) { | |||
2151 | // Emit the code for the jump table | |||
2152 | assert(JT.Reg != -1U && "Should lower JT Header first!")((JT.Reg != -1U && "Should lower JT Header first!") ? static_cast<void> (0) : __assert_fail ("JT.Reg != -1U && \"Should lower JT Header first!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 2152, __PRETTY_FUNCTION__)); | |||
2153 | EVT PTy = DAG.getTargetLoweringInfo().getPointerTy(DAG.getDataLayout()); | |||
2154 | SDValue Index = DAG.getCopyFromReg(getControlRoot(), getCurSDLoc(), | |||
2155 | JT.Reg, PTy); | |||
2156 | SDValue Table = DAG.getJumpTable(JT.JTI, PTy); | |||
2157 | SDValue BrJumpTable = DAG.getNode(ISD::BR_JT, getCurSDLoc(), | |||
2158 | MVT::Other, Index.getValue(1), | |||
2159 | Table, Index); | |||
2160 | DAG.setRoot(BrJumpTable); | |||
2161 | } | |||
2162 | ||||
2163 | /// visitJumpTableHeader - This function emits necessary code to produce index | |||
2164 | /// in the JumpTable from switch case. | |||
2165 | void SelectionDAGBuilder::visitJumpTableHeader(JumpTable &JT, | |||
2166 | JumpTableHeader &JTH, | |||
2167 | MachineBasicBlock *SwitchBB) { | |||
2168 | SDLoc dl = getCurSDLoc(); | |||
2169 | ||||
2170 | // Subtract the lowest switch case value from the value being switched on and | |||
2171 | // conditional branch to default mbb if the result is greater than the | |||
2172 | // difference between smallest and largest cases. | |||
2173 | SDValue SwitchOp = getValue(JTH.SValue); | |||
2174 | EVT VT = SwitchOp.getValueType(); | |||
2175 | SDValue Sub = DAG.getNode(ISD::SUB, dl, VT, SwitchOp, | |||
2176 | DAG.getConstant(JTH.First, dl, VT)); | |||
2177 | ||||
2178 | // The SDNode we just created, which holds the value being switched on minus | |||
2179 | // the smallest case value, needs to be copied to a virtual register so it | |||
2180 | // can be used as an index into the jump table in a subsequent basic block. | |||
2181 | // This value may be smaller or larger than the target's pointer type, and | |||
2182 | // therefore require extension or truncating. | |||
2183 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
2184 | SwitchOp = DAG.getZExtOrTrunc(Sub, dl, TLI.getPointerTy(DAG.getDataLayout())); | |||
2185 | ||||
2186 | unsigned JumpTableReg = | |||
2187 | FuncInfo.CreateReg(TLI.getPointerTy(DAG.getDataLayout())); | |||
2188 | SDValue CopyTo = DAG.getCopyToReg(getControlRoot(), dl, | |||
2189 | JumpTableReg, SwitchOp); | |||
2190 | JT.Reg = JumpTableReg; | |||
2191 | ||||
2192 | // Emit the range check for the jump table, and branch to the default block | |||
2193 | // for the switch statement if the value being switched on exceeds the largest | |||
2194 | // case in the switch. | |||
2195 | SDValue CMP = DAG.getSetCC( | |||
2196 | dl, TLI.getSetCCResultType(DAG.getDataLayout(), *DAG.getContext(), | |||
2197 | Sub.getValueType()), | |||
2198 | Sub, DAG.getConstant(JTH.Last - JTH.First, dl, VT), ISD::SETUGT); | |||
2199 | ||||
2200 | SDValue BrCond = DAG.getNode(ISD::BRCOND, dl, | |||
2201 | MVT::Other, CopyTo, CMP, | |||
2202 | DAG.getBasicBlock(JT.Default)); | |||
2203 | ||||
2204 | // Avoid emitting unnecessary branches to the next block. | |||
2205 | if (JT.MBB != NextBlock(SwitchBB)) | |||
2206 | BrCond = DAG.getNode(ISD::BR, dl, MVT::Other, BrCond, | |||
2207 | DAG.getBasicBlock(JT.MBB)); | |||
2208 | ||||
2209 | DAG.setRoot(BrCond); | |||
2210 | } | |||
2211 | ||||
2212 | /// Create a LOAD_STACK_GUARD node, and let it carry the target specific global | |||
2213 | /// variable if there exists one. | |||
2214 | static SDValue getLoadStackGuard(SelectionDAG &DAG, const SDLoc &DL, | |||
2215 | SDValue &Chain) { | |||
2216 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
2217 | EVT PtrTy = TLI.getPointerTy(DAG.getDataLayout()); | |||
2218 | MachineFunction &MF = DAG.getMachineFunction(); | |||
2219 | Value *Global = TLI.getSDagStackGuard(*MF.getFunction().getParent()); | |||
2220 | MachineSDNode *Node = | |||
2221 | DAG.getMachineNode(TargetOpcode::LOAD_STACK_GUARD, DL, PtrTy, Chain); | |||
2222 | if (Global) { | |||
2223 | MachinePointerInfo MPInfo(Global); | |||
2224 | auto Flags = MachineMemOperand::MOLoad | MachineMemOperand::MOInvariant | | |||
2225 | MachineMemOperand::MODereferenceable; | |||
2226 | MachineMemOperand *MemRef = MF.getMachineMemOperand( | |||
2227 | MPInfo, Flags, PtrTy.getSizeInBits() / 8, DAG.getEVTAlignment(PtrTy)); | |||
2228 | DAG.setNodeMemRefs(Node, {MemRef}); | |||
2229 | } | |||
2230 | return SDValue(Node, 0); | |||
2231 | } | |||
2232 | ||||
2233 | /// Codegen a new tail for a stack protector check ParentMBB which has had its | |||
2234 | /// tail spliced into a stack protector check success bb. | |||
2235 | /// | |||
2236 | /// For a high level explanation of how this fits into the stack protector | |||
2237 | /// generation see the comment on the declaration of class | |||
2238 | /// StackProtectorDescriptor. | |||
2239 | void SelectionDAGBuilder::visitSPDescriptorParent(StackProtectorDescriptor &SPD, | |||
2240 | MachineBasicBlock *ParentBB) { | |||
2241 | ||||
2242 | // First create the loads to the guard/stack slot for the comparison. | |||
2243 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
2244 | EVT PtrTy = TLI.getPointerTy(DAG.getDataLayout()); | |||
2245 | ||||
2246 | MachineFrameInfo &MFI = ParentBB->getParent()->getFrameInfo(); | |||
2247 | int FI = MFI.getStackProtectorIndex(); | |||
2248 | ||||
2249 | SDValue Guard; | |||
2250 | SDLoc dl = getCurSDLoc(); | |||
2251 | SDValue StackSlotPtr = DAG.getFrameIndex(FI, PtrTy); | |||
2252 | const Module &M = *ParentBB->getParent()->getFunction().getParent(); | |||
2253 | unsigned Align = DL->getPrefTypeAlignment(Type::getInt8PtrTy(M.getContext())); | |||
2254 | ||||
2255 | // Generate code to load the content of the guard slot. | |||
2256 | SDValue GuardVal = DAG.getLoad( | |||
2257 | PtrTy, dl, DAG.getEntryNode(), StackSlotPtr, | |||
2258 | MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), FI), Align, | |||
2259 | MachineMemOperand::MOVolatile); | |||
2260 | ||||
2261 | if (TLI.useStackGuardXorFP()) | |||
2262 | GuardVal = TLI.emitStackGuardXorFP(DAG, GuardVal, dl); | |||
2263 | ||||
2264 | // Retrieve guard check function, nullptr if instrumentation is inlined. | |||
2265 | if (const Value *GuardCheck = TLI.getSSPStackGuardCheck(M)) { | |||
2266 | // The target provides a guard check function to validate the guard value. | |||
2267 | // Generate a call to that function with the content of the guard slot as | |||
2268 | // argument. | |||
2269 | auto *Fn = cast<Function>(GuardCheck); | |||
2270 | FunctionType *FnTy = Fn->getFunctionType(); | |||
2271 | assert(FnTy->getNumParams() == 1 && "Invalid function signature")((FnTy->getNumParams() == 1 && "Invalid function signature" ) ? static_cast<void> (0) : __assert_fail ("FnTy->getNumParams() == 1 && \"Invalid function signature\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 2271, __PRETTY_FUNCTION__)); | |||
2272 | ||||
2273 | TargetLowering::ArgListTy Args; | |||
2274 | TargetLowering::ArgListEntry Entry; | |||
2275 | Entry.Node = GuardVal; | |||
2276 | Entry.Ty = FnTy->getParamType(0); | |||
2277 | if (Fn->hasAttribute(1, Attribute::AttrKind::InReg)) | |||
2278 | Entry.IsInReg = true; | |||
2279 | Args.push_back(Entry); | |||
2280 | ||||
2281 | TargetLowering::CallLoweringInfo CLI(DAG); | |||
2282 | CLI.setDebugLoc(getCurSDLoc()) | |||
2283 | .setChain(DAG.getEntryNode()) | |||
2284 | .setCallee(Fn->getCallingConv(), FnTy->getReturnType(), | |||
2285 | getValue(GuardCheck), std::move(Args)); | |||
2286 | ||||
2287 | std::pair<SDValue, SDValue> Result = TLI.LowerCallTo(CLI); | |||
2288 | DAG.setRoot(Result.second); | |||
2289 | return; | |||
2290 | } | |||
2291 | ||||
2292 | // If useLoadStackGuardNode returns true, generate LOAD_STACK_GUARD. | |||
2293 | // Otherwise, emit a volatile load to retrieve the stack guard value. | |||
2294 | SDValue Chain = DAG.getEntryNode(); | |||
2295 | if (TLI.useLoadStackGuardNode()) { | |||
2296 | Guard = getLoadStackGuard(DAG, dl, Chain); | |||
2297 | } else { | |||
2298 | const Value *IRGuard = TLI.getSDagStackGuard(M); | |||
2299 | SDValue GuardPtr = getValue(IRGuard); | |||
2300 | ||||
2301 | Guard = | |||
2302 | DAG.getLoad(PtrTy, dl, Chain, GuardPtr, MachinePointerInfo(IRGuard, 0), | |||
2303 | Align, MachineMemOperand::MOVolatile); | |||
2304 | } | |||
2305 | ||||
2306 | // Perform the comparison via a subtract/getsetcc. | |||
2307 | EVT VT = Guard.getValueType(); | |||
2308 | SDValue Sub = DAG.getNode(ISD::SUB, dl, VT, Guard, GuardVal); | |||
2309 | ||||
2310 | SDValue Cmp = DAG.getSetCC(dl, TLI.getSetCCResultType(DAG.getDataLayout(), | |||
2311 | *DAG.getContext(), | |||
2312 | Sub.getValueType()), | |||
2313 | Sub, DAG.getConstant(0, dl, VT), ISD::SETNE); | |||
2314 | ||||
2315 | // If the sub is not 0, then we know the guard/stackslot do not equal, so | |||
2316 | // branch to failure MBB. | |||
2317 | SDValue BrCond = DAG.getNode(ISD::BRCOND, dl, | |||
2318 | MVT::Other, GuardVal.getOperand(0), | |||
2319 | Cmp, DAG.getBasicBlock(SPD.getFailureMBB())); | |||
2320 | // Otherwise branch to success MBB. | |||
2321 | SDValue Br = DAG.getNode(ISD::BR, dl, | |||
2322 | MVT::Other, BrCond, | |||
2323 | DAG.getBasicBlock(SPD.getSuccessMBB())); | |||
2324 | ||||
2325 | DAG.setRoot(Br); | |||
2326 | } | |||
2327 | ||||
2328 | /// Codegen the failure basic block for a stack protector check. | |||
2329 | /// | |||
2330 | /// A failure stack protector machine basic block consists simply of a call to | |||
2331 | /// __stack_chk_fail(). | |||
2332 | /// | |||
2333 | /// For a high level explanation of how this fits into the stack protector | |||
2334 | /// generation see the comment on the declaration of class | |||
2335 | /// StackProtectorDescriptor. | |||
2336 | void | |||
2337 | SelectionDAGBuilder::visitSPDescriptorFailure(StackProtectorDescriptor &SPD) { | |||
2338 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
2339 | SDValue Chain = | |||
2340 | TLI.makeLibCall(DAG, RTLIB::STACKPROTECTOR_CHECK_FAIL, MVT::isVoid, | |||
2341 | None, false, getCurSDLoc(), false, false).second; | |||
2342 | DAG.setRoot(Chain); | |||
2343 | } | |||
2344 | ||||
2345 | /// visitBitTestHeader - This function emits necessary code to produce value | |||
2346 | /// suitable for "bit tests" | |||
2347 | void SelectionDAGBuilder::visitBitTestHeader(BitTestBlock &B, | |||
2348 | MachineBasicBlock *SwitchBB) { | |||
2349 | SDLoc dl = getCurSDLoc(); | |||
2350 | ||||
2351 | // Subtract the minimum value | |||
2352 | SDValue SwitchOp = getValue(B.SValue); | |||
2353 | EVT VT = SwitchOp.getValueType(); | |||
2354 | SDValue Sub = DAG.getNode(ISD::SUB, dl, VT, SwitchOp, | |||
2355 | DAG.getConstant(B.First, dl, VT)); | |||
2356 | ||||
2357 | // Check range | |||
2358 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
2359 | SDValue RangeCmp = DAG.getSetCC( | |||
2360 | dl, TLI.getSetCCResultType(DAG.getDataLayout(), *DAG.getContext(), | |||
2361 | Sub.getValueType()), | |||
2362 | Sub, DAG.getConstant(B.Range, dl, VT), ISD::SETUGT); | |||
2363 | ||||
2364 | // Determine the type of the test operands. | |||
2365 | bool UsePtrType = false; | |||
2366 | if (!TLI.isTypeLegal(VT)) | |||
2367 | UsePtrType = true; | |||
2368 | else { | |||
2369 | for (unsigned i = 0, e = B.Cases.size(); i != e; ++i) | |||
2370 | if (!isUIntN(VT.getSizeInBits(), B.Cases[i].Mask)) { | |||
2371 | // Switch table case range are encoded into series of masks. | |||
2372 | // Just use pointer type, it's guaranteed to fit. | |||
2373 | UsePtrType = true; | |||
2374 | break; | |||
2375 | } | |||
2376 | } | |||
2377 | if (UsePtrType) { | |||
2378 | VT = TLI.getPointerTy(DAG.getDataLayout()); | |||
2379 | Sub = DAG.getZExtOrTrunc(Sub, dl, VT); | |||
2380 | } | |||
2381 | ||||
2382 | B.RegVT = VT.getSimpleVT(); | |||
2383 | B.Reg = FuncInfo.CreateReg(B.RegVT); | |||
2384 | SDValue CopyTo = DAG.getCopyToReg(getControlRoot(), dl, B.Reg, Sub); | |||
2385 | ||||
2386 | MachineBasicBlock* MBB = B.Cases[0].ThisBB; | |||
2387 | ||||
2388 | addSuccessorWithProb(SwitchBB, B.Default, B.DefaultProb); | |||
2389 | addSuccessorWithProb(SwitchBB, MBB, B.Prob); | |||
2390 | SwitchBB->normalizeSuccProbs(); | |||
2391 | ||||
2392 | SDValue BrRange = DAG.getNode(ISD::BRCOND, dl, | |||
2393 | MVT::Other, CopyTo, RangeCmp, | |||
2394 | DAG.getBasicBlock(B.Default)); | |||
2395 | ||||
2396 | // Avoid emitting unnecessary branches to the next block. | |||
2397 | if (MBB != NextBlock(SwitchBB)) | |||
2398 | BrRange = DAG.getNode(ISD::BR, dl, MVT::Other, BrRange, | |||
2399 | DAG.getBasicBlock(MBB)); | |||
2400 | ||||
2401 | DAG.setRoot(BrRange); | |||
2402 | } | |||
2403 | ||||
2404 | /// visitBitTestCase - this function produces one "bit test" | |||
2405 | void SelectionDAGBuilder::visitBitTestCase(BitTestBlock &BB, | |||
2406 | MachineBasicBlock* NextMBB, | |||
2407 | BranchProbability BranchProbToNext, | |||
2408 | unsigned Reg, | |||
2409 | BitTestCase &B, | |||
2410 | MachineBasicBlock *SwitchBB) { | |||
2411 | SDLoc dl = getCurSDLoc(); | |||
2412 | MVT VT = BB.RegVT; | |||
2413 | SDValue ShiftOp = DAG.getCopyFromReg(getControlRoot(), dl, Reg, VT); | |||
2414 | SDValue Cmp; | |||
2415 | unsigned PopCount = countPopulation(B.Mask); | |||
2416 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
2417 | if (PopCount == 1) { | |||
2418 | // Testing for a single bit; just compare the shift count with what it | |||
2419 | // would need to be to shift a 1 bit in that position. | |||
2420 | Cmp = DAG.getSetCC( | |||
2421 | dl, TLI.getSetCCResultType(DAG.getDataLayout(), *DAG.getContext(), VT), | |||
2422 | ShiftOp, DAG.getConstant(countTrailingZeros(B.Mask), dl, VT), | |||
2423 | ISD::SETEQ); | |||
2424 | } else if (PopCount == BB.Range) { | |||
2425 | // There is only one zero bit in the range, test for it directly. | |||
2426 | Cmp = DAG.getSetCC( | |||
2427 | dl, TLI.getSetCCResultType(DAG.getDataLayout(), *DAG.getContext(), VT), | |||
2428 | ShiftOp, DAG.getConstant(countTrailingOnes(B.Mask), dl, VT), | |||
2429 | ISD::SETNE); | |||
2430 | } else { | |||
2431 | // Make desired shift | |||
2432 | SDValue SwitchVal = DAG.getNode(ISD::SHL, dl, VT, | |||
2433 | DAG.getConstant(1, dl, VT), ShiftOp); | |||
2434 | ||||
2435 | // Emit bit tests and jumps | |||
2436 | SDValue AndOp = DAG.getNode(ISD::AND, dl, | |||
2437 | VT, SwitchVal, DAG.getConstant(B.Mask, dl, VT)); | |||
2438 | Cmp = DAG.getSetCC( | |||
2439 | dl, TLI.getSetCCResultType(DAG.getDataLayout(), *DAG.getContext(), VT), | |||
2440 | AndOp, DAG.getConstant(0, dl, VT), ISD::SETNE); | |||
2441 | } | |||
2442 | ||||
2443 | // The branch probability from SwitchBB to B.TargetBB is B.ExtraProb. | |||
2444 | addSuccessorWithProb(SwitchBB, B.TargetBB, B.ExtraProb); | |||
2445 | // The branch probability from SwitchBB to NextMBB is BranchProbToNext. | |||
2446 | addSuccessorWithProb(SwitchBB, NextMBB, BranchProbToNext); | |||
2447 | // It is not guaranteed that the sum of B.ExtraProb and BranchProbToNext is | |||
2448 | // one as they are relative probabilities (and thus work more like weights), | |||
2449 | // and hence we need to normalize them to let the sum of them become one. | |||
2450 | SwitchBB->normalizeSuccProbs(); | |||
2451 | ||||
2452 | SDValue BrAnd = DAG.getNode(ISD::BRCOND, dl, | |||
2453 | MVT::Other, getControlRoot(), | |||
2454 | Cmp, DAG.getBasicBlock(B.TargetBB)); | |||
2455 | ||||
2456 | // Avoid emitting unnecessary branches to the next block. | |||
2457 | if (NextMBB != NextBlock(SwitchBB)) | |||
2458 | BrAnd = DAG.getNode(ISD::BR, dl, MVT::Other, BrAnd, | |||
2459 | DAG.getBasicBlock(NextMBB)); | |||
2460 | ||||
2461 | DAG.setRoot(BrAnd); | |||
2462 | } | |||
2463 | ||||
2464 | void SelectionDAGBuilder::visitInvoke(const InvokeInst &I) { | |||
2465 | MachineBasicBlock *InvokeMBB = FuncInfo.MBB; | |||
2466 | ||||
2467 | // Retrieve successors. Look through artificial IR level blocks like | |||
2468 | // catchswitch for successors. | |||
2469 | MachineBasicBlock *Return = FuncInfo.MBBMap[I.getSuccessor(0)]; | |||
2470 | const BasicBlock *EHPadBB = I.getSuccessor(1); | |||
2471 | ||||
2472 | // Deopt bundles are lowered in LowerCallSiteWithDeoptBundle, and we don't | |||
2473 | // have to do anything here to lower funclet bundles. | |||
2474 | assert(!I.hasOperandBundlesOtherThan(((!I.hasOperandBundlesOtherThan( {LLVMContext::OB_deopt, LLVMContext ::OB_funclet}) && "Cannot lower invokes with arbitrary operand bundles yet!" ) ? static_cast<void> (0) : __assert_fail ("!I.hasOperandBundlesOtherThan( {LLVMContext::OB_deopt, LLVMContext::OB_funclet}) && \"Cannot lower invokes with arbitrary operand bundles yet!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 2476, __PRETTY_FUNCTION__)) | |||
2475 | {LLVMContext::OB_deopt, LLVMContext::OB_funclet}) &&((!I.hasOperandBundlesOtherThan( {LLVMContext::OB_deopt, LLVMContext ::OB_funclet}) && "Cannot lower invokes with arbitrary operand bundles yet!" ) ? static_cast<void> (0) : __assert_fail ("!I.hasOperandBundlesOtherThan( {LLVMContext::OB_deopt, LLVMContext::OB_funclet}) && \"Cannot lower invokes with arbitrary operand bundles yet!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 2476, __PRETTY_FUNCTION__)) | |||
2476 | "Cannot lower invokes with arbitrary operand bundles yet!")((!I.hasOperandBundlesOtherThan( {LLVMContext::OB_deopt, LLVMContext ::OB_funclet}) && "Cannot lower invokes with arbitrary operand bundles yet!" ) ? static_cast<void> (0) : __assert_fail ("!I.hasOperandBundlesOtherThan( {LLVMContext::OB_deopt, LLVMContext::OB_funclet}) && \"Cannot lower invokes with arbitrary operand bundles yet!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 2476, __PRETTY_FUNCTION__)); | |||
2477 | ||||
2478 | const Value *Callee(I.getCalledValue()); | |||
2479 | const Function *Fn = dyn_cast<Function>(Callee); | |||
2480 | if (isa<InlineAsm>(Callee)) | |||
2481 | visitInlineAsm(&I); | |||
2482 | else if (Fn && Fn->isIntrinsic()) { | |||
2483 | switch (Fn->getIntrinsicID()) { | |||
2484 | default: | |||
2485 | llvm_unreachable("Cannot invoke this intrinsic")::llvm::llvm_unreachable_internal("Cannot invoke this intrinsic" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 2485); | |||
2486 | case Intrinsic::donothing: | |||
2487 | // Ignore invokes to @llvm.donothing: jump directly to the next BB. | |||
2488 | break; | |||
2489 | case Intrinsic::experimental_patchpoint_void: | |||
2490 | case Intrinsic::experimental_patchpoint_i64: | |||
2491 | visitPatchpoint(&I, EHPadBB); | |||
2492 | break; | |||
2493 | case Intrinsic::experimental_gc_statepoint: | |||
2494 | LowerStatepoint(ImmutableStatepoint(&I), EHPadBB); | |||
2495 | break; | |||
2496 | } | |||
2497 | } else if (I.countOperandBundlesOfType(LLVMContext::OB_deopt)) { | |||
2498 | // Currently we do not lower any intrinsic calls with deopt operand bundles. | |||
2499 | // Eventually we will support lowering the @llvm.experimental.deoptimize | |||
2500 | // intrinsic, and right now there are no plans to support other intrinsics | |||
2501 | // with deopt state. | |||
2502 | LowerCallSiteWithDeoptBundle(&I, getValue(Callee), EHPadBB); | |||
2503 | } else { | |||
2504 | LowerCallTo(&I, getValue(Callee), false, EHPadBB); | |||
2505 | } | |||
2506 | ||||
2507 | // If the value of the invoke is used outside of its defining block, make it | |||
2508 | // available as a virtual register. | |||
2509 | // We already took care of the exported value for the statepoint instruction | |||
2510 | // during call to the LowerStatepoint. | |||
2511 | if (!isStatepoint(I)) { | |||
2512 | CopyToExportRegsIfNeeded(&I); | |||
2513 | } | |||
2514 | ||||
2515 | SmallVector<std::pair<MachineBasicBlock *, BranchProbability>, 1> UnwindDests; | |||
2516 | BranchProbabilityInfo *BPI = FuncInfo.BPI; | |||
2517 | BranchProbability EHPadBBProb = | |||
2518 | BPI ? BPI->getEdgeProbability(InvokeMBB->getBasicBlock(), EHPadBB) | |||
2519 | : BranchProbability::getZero(); | |||
2520 | findUnwindDestinations(FuncInfo, EHPadBB, EHPadBBProb, UnwindDests); | |||
2521 | ||||
2522 | // Update successor info. | |||
2523 | addSuccessorWithProb(InvokeMBB, Return); | |||
2524 | for (auto &UnwindDest : UnwindDests) { | |||
2525 | UnwindDest.first->setIsEHPad(); | |||
2526 | addSuccessorWithProb(InvokeMBB, UnwindDest.first, UnwindDest.second); | |||
2527 | } | |||
2528 | InvokeMBB->normalizeSuccProbs(); | |||
2529 | ||||
2530 | // Drop into normal successor. | |||
2531 | DAG.setRoot(DAG.getNode(ISD::BR, getCurSDLoc(), | |||
2532 | MVT::Other, getControlRoot(), | |||
2533 | DAG.getBasicBlock(Return))); | |||
2534 | } | |||
2535 | ||||
2536 | void SelectionDAGBuilder::visitResume(const ResumeInst &RI) { | |||
2537 | llvm_unreachable("SelectionDAGBuilder shouldn't visit resume instructions!")::llvm::llvm_unreachable_internal("SelectionDAGBuilder shouldn't visit resume instructions!" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 2537); | |||
2538 | } | |||
2539 | ||||
2540 | void SelectionDAGBuilder::visitLandingPad(const LandingPadInst &LP) { | |||
2541 | assert(FuncInfo.MBB->isEHPad() &&((FuncInfo.MBB->isEHPad() && "Call to landingpad not in landing pad!" ) ? static_cast<void> (0) : __assert_fail ("FuncInfo.MBB->isEHPad() && \"Call to landingpad not in landing pad!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 2542, __PRETTY_FUNCTION__)) | |||
2542 | "Call to landingpad not in landing pad!")((FuncInfo.MBB->isEHPad() && "Call to landingpad not in landing pad!" ) ? static_cast<void> (0) : __assert_fail ("FuncInfo.MBB->isEHPad() && \"Call to landingpad not in landing pad!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 2542, __PRETTY_FUNCTION__)); | |||
2543 | ||||
2544 | // If there aren't registers to copy the values into (e.g., during SjLj | |||
2545 | // exceptions), then don't bother to create these DAG nodes. | |||
2546 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
2547 | const Constant *PersonalityFn = FuncInfo.Fn->getPersonalityFn(); | |||
2548 | if (TLI.getExceptionPointerRegister(PersonalityFn) == 0 && | |||
2549 | TLI.getExceptionSelectorRegister(PersonalityFn) == 0) | |||
2550 | return; | |||
2551 | ||||
2552 | // If landingpad's return type is token type, we don't create DAG nodes | |||
2553 | // for its exception pointer and selector value. The extraction of exception | |||
2554 | // pointer or selector value from token type landingpads is not currently | |||
2555 | // supported. | |||
2556 | if (LP.getType()->isTokenTy()) | |||
2557 | return; | |||
2558 | ||||
2559 | SmallVector<EVT, 2> ValueVTs; | |||
2560 | SDLoc dl = getCurSDLoc(); | |||
2561 | ComputeValueVTs(TLI, DAG.getDataLayout(), LP.getType(), ValueVTs); | |||
2562 | assert(ValueVTs.size() == 2 && "Only two-valued landingpads are supported")((ValueVTs.size() == 2 && "Only two-valued landingpads are supported" ) ? static_cast<void> (0) : __assert_fail ("ValueVTs.size() == 2 && \"Only two-valued landingpads are supported\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 2562, __PRETTY_FUNCTION__)); | |||
2563 | ||||
2564 | // Get the two live-in registers as SDValues. The physregs have already been | |||
2565 | // copied into virtual registers. | |||
2566 | SDValue Ops[2]; | |||
2567 | if (FuncInfo.ExceptionPointerVirtReg) { | |||
2568 | Ops[0] = DAG.getZExtOrTrunc( | |||
2569 | DAG.getCopyFromReg(DAG.getEntryNode(), dl, | |||
2570 | FuncInfo.ExceptionPointerVirtReg, | |||
2571 | TLI.getPointerTy(DAG.getDataLayout())), | |||
2572 | dl, ValueVTs[0]); | |||
2573 | } else { | |||
2574 | Ops[0] = DAG.getConstant(0, dl, TLI.getPointerTy(DAG.getDataLayout())); | |||
2575 | } | |||
2576 | Ops[1] = DAG.getZExtOrTrunc( | |||
2577 | DAG.getCopyFromReg(DAG.getEntryNode(), dl, | |||
2578 | FuncInfo.ExceptionSelectorVirtReg, | |||
2579 | TLI.getPointerTy(DAG.getDataLayout())), | |||
2580 | dl, ValueVTs[1]); | |||
2581 | ||||
2582 | // Merge into one. | |||
2583 | SDValue Res = DAG.getNode(ISD::MERGE_VALUES, dl, | |||
2584 | DAG.getVTList(ValueVTs), Ops); | |||
2585 | setValue(&LP, Res); | |||
2586 | } | |||
2587 | ||||
2588 | void SelectionDAGBuilder::sortAndRangeify(CaseClusterVector &Clusters) { | |||
2589 | #ifndef NDEBUG | |||
2590 | for (const CaseCluster &CC : Clusters) | |||
2591 | assert(CC.Low == CC.High && "Input clusters must be single-case")((CC.Low == CC.High && "Input clusters must be single-case" ) ? static_cast<void> (0) : __assert_fail ("CC.Low == CC.High && \"Input clusters must be single-case\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 2591, __PRETTY_FUNCTION__)); | |||
2592 | #endif | |||
2593 | ||||
2594 | llvm::sort(Clusters, [](const CaseCluster &a, const CaseCluster &b) { | |||
2595 | return a.Low->getValue().slt(b.Low->getValue()); | |||
2596 | }); | |||
2597 | ||||
2598 | // Merge adjacent clusters with the same destination. | |||
2599 | const unsigned N = Clusters.size(); | |||
2600 | unsigned DstIndex = 0; | |||
2601 | for (unsigned SrcIndex = 0; SrcIndex < N; ++SrcIndex) { | |||
2602 | CaseCluster &CC = Clusters[SrcIndex]; | |||
2603 | const ConstantInt *CaseVal = CC.Low; | |||
2604 | MachineBasicBlock *Succ = CC.MBB; | |||
2605 | ||||
2606 | if (DstIndex != 0 && Clusters[DstIndex - 1].MBB == Succ && | |||
2607 | (CaseVal->getValue() - Clusters[DstIndex - 1].High->getValue()) == 1) { | |||
2608 | // If this case has the same successor and is a neighbour, merge it into | |||
2609 | // the previous cluster. | |||
2610 | Clusters[DstIndex - 1].High = CaseVal; | |||
2611 | Clusters[DstIndex - 1].Prob += CC.Prob; | |||
2612 | } else { | |||
2613 | std::memmove(&Clusters[DstIndex++], &Clusters[SrcIndex], | |||
2614 | sizeof(Clusters[SrcIndex])); | |||
2615 | } | |||
2616 | } | |||
2617 | Clusters.resize(DstIndex); | |||
2618 | } | |||
2619 | ||||
2620 | void SelectionDAGBuilder::UpdateSplitBlock(MachineBasicBlock *First, | |||
2621 | MachineBasicBlock *Last) { | |||
2622 | // Update JTCases. | |||
2623 | for (unsigned i = 0, e = JTCases.size(); i != e; ++i) | |||
2624 | if (JTCases[i].first.HeaderBB == First) | |||
2625 | JTCases[i].first.HeaderBB = Last; | |||
2626 | ||||
2627 | // Update BitTestCases. | |||
2628 | for (unsigned i = 0, e = BitTestCases.size(); i != e; ++i) | |||
2629 | if (BitTestCases[i].Parent == First) | |||
2630 | BitTestCases[i].Parent = Last; | |||
2631 | } | |||
2632 | ||||
2633 | void SelectionDAGBuilder::visitIndirectBr(const IndirectBrInst &I) { | |||
2634 | MachineBasicBlock *IndirectBrMBB = FuncInfo.MBB; | |||
2635 | ||||
2636 | // Update machine-CFG edges with unique successors. | |||
2637 | SmallSet<BasicBlock*, 32> Done; | |||
2638 | for (unsigned i = 0, e = I.getNumSuccessors(); i != e; ++i) { | |||
2639 | BasicBlock *BB = I.getSuccessor(i); | |||
2640 | bool Inserted = Done.insert(BB).second; | |||
2641 | if (!Inserted) | |||
2642 | continue; | |||
2643 | ||||
2644 | MachineBasicBlock *Succ = FuncInfo.MBBMap[BB]; | |||
2645 | addSuccessorWithProb(IndirectBrMBB, Succ); | |||
2646 | } | |||
2647 | IndirectBrMBB->normalizeSuccProbs(); | |||
2648 | ||||
2649 | DAG.setRoot(DAG.getNode(ISD::BRIND, getCurSDLoc(), | |||
2650 | MVT::Other, getControlRoot(), | |||
2651 | getValue(I.getAddress()))); | |||
2652 | } | |||
2653 | ||||
2654 | void SelectionDAGBuilder::visitUnreachable(const UnreachableInst &I) { | |||
2655 | if (!DAG.getTarget().Options.TrapUnreachable) | |||
2656 | return; | |||
2657 | ||||
2658 | // We may be able to ignore unreachable behind a noreturn call. | |||
2659 | if (DAG.getTarget().Options.NoTrapAfterNoreturn) { | |||
2660 | const BasicBlock &BB = *I.getParent(); | |||
2661 | if (&I != &BB.front()) { | |||
2662 | BasicBlock::const_iterator PredI = | |||
2663 | std::prev(BasicBlock::const_iterator(&I)); | |||
2664 | if (const CallInst *Call = dyn_cast<CallInst>(&*PredI)) { | |||
2665 | if (Call->doesNotReturn()) | |||
2666 | return; | |||
2667 | } | |||
2668 | } | |||
2669 | } | |||
2670 | ||||
2671 | DAG.setRoot(DAG.getNode(ISD::TRAP, getCurSDLoc(), MVT::Other, DAG.getRoot())); | |||
2672 | } | |||
2673 | ||||
2674 | void SelectionDAGBuilder::visitFSub(const User &I) { | |||
2675 | // -0.0 - X --> fneg | |||
2676 | Type *Ty = I.getType(); | |||
2677 | if (isa<Constant>(I.getOperand(0)) && | |||
2678 | I.getOperand(0) == ConstantFP::getZeroValueForNegation(Ty)) { | |||
2679 | SDValue Op2 = getValue(I.getOperand(1)); | |||
2680 | setValue(&I, DAG.getNode(ISD::FNEG, getCurSDLoc(), | |||
2681 | Op2.getValueType(), Op2)); | |||
2682 | return; | |||
2683 | } | |||
2684 | ||||
2685 | visitBinary(I, ISD::FSUB); | |||
2686 | } | |||
2687 | ||||
2688 | /// Checks if the given instruction performs a vector reduction, in which case | |||
2689 | /// we have the freedom to alter the elements in the result as long as the | |||
2690 | /// reduction of them stays unchanged. | |||
2691 | static bool isVectorReductionOp(const User *I) { | |||
2692 | const Instruction *Inst = dyn_cast<Instruction>(I); | |||
2693 | if (!Inst || !Inst->getType()->isVectorTy()) | |||
2694 | return false; | |||
2695 | ||||
2696 | auto OpCode = Inst->getOpcode(); | |||
2697 | switch (OpCode) { | |||
2698 | case Instruction::Add: | |||
2699 | case Instruction::Mul: | |||
2700 | case Instruction::And: | |||
2701 | case Instruction::Or: | |||
2702 | case Instruction::Xor: | |||
2703 | break; | |||
2704 | case Instruction::FAdd: | |||
2705 | case Instruction::FMul: | |||
2706 | if (const FPMathOperator *FPOp = dyn_cast<const FPMathOperator>(Inst)) | |||
2707 | if (FPOp->getFastMathFlags().isFast()) | |||
2708 | break; | |||
2709 | LLVM_FALLTHROUGH[[clang::fallthrough]]; | |||
2710 | default: | |||
2711 | return false; | |||
2712 | } | |||
2713 | ||||
2714 | unsigned ElemNum = Inst->getType()->getVectorNumElements(); | |||
2715 | // Ensure the reduction size is a power of 2. | |||
2716 | if (!isPowerOf2_32(ElemNum)) | |||
2717 | return false; | |||
2718 | ||||
2719 | unsigned ElemNumToReduce = ElemNum; | |||
2720 | ||||
2721 | // Do DFS search on the def-use chain from the given instruction. We only | |||
2722 | // allow four kinds of operations during the search until we reach the | |||
2723 | // instruction that extracts the first element from the vector: | |||
2724 | // | |||
2725 | // 1. The reduction operation of the same opcode as the given instruction. | |||
2726 | // | |||
2727 | // 2. PHI node. | |||
2728 | // | |||
2729 | // 3. ShuffleVector instruction together with a reduction operation that | |||
2730 | // does a partial reduction. | |||
2731 | // | |||
2732 | // 4. ExtractElement that extracts the first element from the vector, and we | |||
2733 | // stop searching the def-use chain here. | |||
2734 | // | |||
2735 | // 3 & 4 above perform a reduction on all elements of the vector. We push defs | |||
2736 | // from 1-3 to the stack to continue the DFS. The given instruction is not | |||
2737 | // a reduction operation if we meet any other instructions other than those | |||
2738 | // listed above. | |||
2739 | ||||
2740 | SmallVector<const User *, 16> UsersToVisit{Inst}; | |||
2741 | SmallPtrSet<const User *, 16> Visited; | |||
2742 | bool ReduxExtracted = false; | |||
2743 | ||||
2744 | while (!UsersToVisit.empty()) { | |||
2745 | auto User = UsersToVisit.back(); | |||
2746 | UsersToVisit.pop_back(); | |||
2747 | if (!Visited.insert(User).second) | |||
2748 | continue; | |||
2749 | ||||
2750 | for (const auto &U : User->users()) { | |||
2751 | auto Inst = dyn_cast<Instruction>(U); | |||
2752 | if (!Inst) | |||
2753 | return false; | |||
2754 | ||||
2755 | if (Inst->getOpcode() == OpCode || isa<PHINode>(U)) { | |||
2756 | if (const FPMathOperator *FPOp = dyn_cast<const FPMathOperator>(Inst)) | |||
2757 | if (!isa<PHINode>(FPOp) && !FPOp->getFastMathFlags().isFast()) | |||
2758 | return false; | |||
2759 | UsersToVisit.push_back(U); | |||
2760 | } else if (const ShuffleVectorInst *ShufInst = | |||
2761 | dyn_cast<ShuffleVectorInst>(U)) { | |||
2762 | // Detect the following pattern: A ShuffleVector instruction together | |||
2763 | // with a reduction that do partial reduction on the first and second | |||
2764 | // ElemNumToReduce / 2 elements, and store the result in | |||
2765 | // ElemNumToReduce / 2 elements in another vector. | |||
2766 | ||||
2767 | unsigned ResultElements = ShufInst->getType()->getVectorNumElements(); | |||
2768 | if (ResultElements < ElemNum) | |||
2769 | return false; | |||
2770 | ||||
2771 | if (ElemNumToReduce == 1) | |||
2772 | return false; | |||
2773 | if (!isa<UndefValue>(U->getOperand(1))) | |||
2774 | return false; | |||
2775 | for (unsigned i = 0; i < ElemNumToReduce / 2; ++i) | |||
2776 | if (ShufInst->getMaskValue(i) != int(i + ElemNumToReduce / 2)) | |||
2777 | return false; | |||
2778 | for (unsigned i = ElemNumToReduce / 2; i < ElemNum; ++i) | |||
2779 | if (ShufInst->getMaskValue(i) != -1) | |||
2780 | return false; | |||
2781 | ||||
2782 | // There is only one user of this ShuffleVector instruction, which | |||
2783 | // must be a reduction operation. | |||
2784 | if (!U->hasOneUse()) | |||
2785 | return false; | |||
2786 | ||||
2787 | auto U2 = dyn_cast<Instruction>(*U->user_begin()); | |||
2788 | if (!U2 || U2->getOpcode() != OpCode) | |||
2789 | return false; | |||
2790 | ||||
2791 | // Check operands of the reduction operation. | |||
2792 | if ((U2->getOperand(0) == U->getOperand(0) && U2->getOperand(1) == U) || | |||
2793 | (U2->getOperand(1) == U->getOperand(0) && U2->getOperand(0) == U)) { | |||
2794 | UsersToVisit.push_back(U2); | |||
2795 | ElemNumToReduce /= 2; | |||
2796 | } else | |||
2797 | return false; | |||
2798 | } else if (isa<ExtractElementInst>(U)) { | |||
2799 | // At this moment we should have reduced all elements in the vector. | |||
2800 | if (ElemNumToReduce != 1) | |||
2801 | return false; | |||
2802 | ||||
2803 | const ConstantInt *Val = dyn_cast<ConstantInt>(U->getOperand(1)); | |||
2804 | if (!Val || !Val->isZero()) | |||
2805 | return false; | |||
2806 | ||||
2807 | ReduxExtracted = true; | |||
2808 | } else | |||
2809 | return false; | |||
2810 | } | |||
2811 | } | |||
2812 | return ReduxExtracted; | |||
2813 | } | |||
2814 | ||||
2815 | void SelectionDAGBuilder::visitUnary(const User &I, unsigned Opcode) { | |||
2816 | SDNodeFlags Flags; | |||
2817 | ||||
2818 | SDValue Op = getValue(I.getOperand(0)); | |||
2819 | SDValue UnNodeValue = DAG.getNode(Opcode, getCurSDLoc(), Op.getValueType(), | |||
2820 | Op, Flags); | |||
2821 | setValue(&I, UnNodeValue); | |||
2822 | } | |||
2823 | ||||
2824 | void SelectionDAGBuilder::visitBinary(const User &I, unsigned Opcode) { | |||
2825 | SDNodeFlags Flags; | |||
2826 | if (auto *OFBinOp = dyn_cast<OverflowingBinaryOperator>(&I)) { | |||
2827 | Flags.setNoSignedWrap(OFBinOp->hasNoSignedWrap()); | |||
2828 | Flags.setNoUnsignedWrap(OFBinOp->hasNoUnsignedWrap()); | |||
2829 | } | |||
2830 | if (auto *ExactOp = dyn_cast<PossiblyExactOperator>(&I)) { | |||
2831 | Flags.setExact(ExactOp->isExact()); | |||
2832 | } | |||
2833 | if (isVectorReductionOp(&I)) { | |||
2834 | Flags.setVectorReduction(true); | |||
2835 | LLVM_DEBUG(dbgs() << "Detected a reduction operation:" << I << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { dbgs() << "Detected a reduction operation:" << I << "\n"; } } while (false); | |||
2836 | } | |||
2837 | ||||
2838 | SDValue Op1 = getValue(I.getOperand(0)); | |||
2839 | SDValue Op2 = getValue(I.getOperand(1)); | |||
2840 | SDValue BinNodeValue = DAG.getNode(Opcode, getCurSDLoc(), Op1.getValueType(), | |||
2841 | Op1, Op2, Flags); | |||
2842 | setValue(&I, BinNodeValue); | |||
2843 | } | |||
2844 | ||||
2845 | void SelectionDAGBuilder::visitShift(const User &I, unsigned Opcode) { | |||
2846 | SDValue Op1 = getValue(I.getOperand(0)); | |||
2847 | SDValue Op2 = getValue(I.getOperand(1)); | |||
2848 | ||||
2849 | EVT ShiftTy = DAG.getTargetLoweringInfo().getShiftAmountTy( | |||
2850 | Op1.getValueType(), DAG.getDataLayout()); | |||
2851 | ||||
2852 | // Coerce the shift amount to the right type if we can. | |||
2853 | if (!I.getType()->isVectorTy() && Op2.getValueType() != ShiftTy) { | |||
2854 | unsigned ShiftSize = ShiftTy.getSizeInBits(); | |||
2855 | unsigned Op2Size = Op2.getValueSizeInBits(); | |||
2856 | SDLoc DL = getCurSDLoc(); | |||
2857 | ||||
2858 | // If the operand is smaller than the shift count type, promote it. | |||
2859 | if (ShiftSize > Op2Size) | |||
2860 | Op2 = DAG.getNode(ISD::ZERO_EXTEND, DL, ShiftTy, Op2); | |||
2861 | ||||
2862 | // If the operand is larger than the shift count type but the shift | |||
2863 | // count type has enough bits to represent any shift value, truncate | |||
2864 | // it now. This is a common case and it exposes the truncate to | |||
2865 | // optimization early. | |||
2866 | else if (ShiftSize >= Log2_32_Ceil(Op2.getValueSizeInBits())) | |||
2867 | Op2 = DAG.getNode(ISD::TRUNCATE, DL, ShiftTy, Op2); | |||
2868 | // Otherwise we'll need to temporarily settle for some other convenient | |||
2869 | // type. Type legalization will make adjustments once the shiftee is split. | |||
2870 | else | |||
2871 | Op2 = DAG.getZExtOrTrunc(Op2, DL, MVT::i32); | |||
2872 | } | |||
2873 | ||||
2874 | bool nuw = false; | |||
2875 | bool nsw = false; | |||
2876 | bool exact = false; | |||
2877 | ||||
2878 | if (Opcode == ISD::SRL || Opcode == ISD::SRA || Opcode == ISD::SHL) { | |||
2879 | ||||
2880 | if (const OverflowingBinaryOperator *OFBinOp = | |||
2881 | dyn_cast<const OverflowingBinaryOperator>(&I)) { | |||
2882 | nuw = OFBinOp->hasNoUnsignedWrap(); | |||
2883 | nsw = OFBinOp->hasNoSignedWrap(); | |||
2884 | } | |||
2885 | if (const PossiblyExactOperator *ExactOp = | |||
2886 | dyn_cast<const PossiblyExactOperator>(&I)) | |||
2887 | exact = ExactOp->isExact(); | |||
2888 | } | |||
2889 | SDNodeFlags Flags; | |||
2890 | Flags.setExact(exact); | |||
2891 | Flags.setNoSignedWrap(nsw); | |||
2892 | Flags.setNoUnsignedWrap(nuw); | |||
2893 | SDValue Res = DAG.getNode(Opcode, getCurSDLoc(), Op1.getValueType(), Op1, Op2, | |||
2894 | Flags); | |||
2895 | setValue(&I, Res); | |||
2896 | } | |||
2897 | ||||
2898 | void SelectionDAGBuilder::visitSDiv(const User &I) { | |||
2899 | SDValue Op1 = getValue(I.getOperand(0)); | |||
2900 | SDValue Op2 = getValue(I.getOperand(1)); | |||
2901 | ||||
2902 | SDNodeFlags Flags; | |||
2903 | Flags.setExact(isa<PossiblyExactOperator>(&I) && | |||
2904 | cast<PossiblyExactOperator>(&I)->isExact()); | |||
2905 | setValue(&I, DAG.getNode(ISD::SDIV, getCurSDLoc(), Op1.getValueType(), Op1, | |||
2906 | Op2, Flags)); | |||
2907 | } | |||
2908 | ||||
2909 | void SelectionDAGBuilder::visitICmp(const User &I) { | |||
2910 | ICmpInst::Predicate predicate = ICmpInst::BAD_ICMP_PREDICATE; | |||
2911 | if (const ICmpInst *IC = dyn_cast<ICmpInst>(&I)) | |||
2912 | predicate = IC->getPredicate(); | |||
2913 | else if (const ConstantExpr *IC = dyn_cast<ConstantExpr>(&I)) | |||
2914 | predicate = ICmpInst::Predicate(IC->getPredicate()); | |||
2915 | SDValue Op1 = getValue(I.getOperand(0)); | |||
2916 | SDValue Op2 = getValue(I.getOperand(1)); | |||
2917 | ISD::CondCode Opcode = getICmpCondCode(predicate); | |||
2918 | ||||
2919 | EVT DestVT = DAG.getTargetLoweringInfo().getValueType(DAG.getDataLayout(), | |||
2920 | I.getType()); | |||
2921 | setValue(&I, DAG.getSetCC(getCurSDLoc(), DestVT, Op1, Op2, Opcode)); | |||
2922 | } | |||
2923 | ||||
2924 | void SelectionDAGBuilder::visitFCmp(const User &I) { | |||
2925 | FCmpInst::Predicate predicate = FCmpInst::BAD_FCMP_PREDICATE; | |||
2926 | if (const FCmpInst *FC = dyn_cast<FCmpInst>(&I)) | |||
2927 | predicate = FC->getPredicate(); | |||
2928 | else if (const ConstantExpr *FC = dyn_cast<ConstantExpr>(&I)) | |||
2929 | predicate = FCmpInst::Predicate(FC->getPredicate()); | |||
2930 | SDValue Op1 = getValue(I.getOperand(0)); | |||
2931 | SDValue Op2 = getValue(I.getOperand(1)); | |||
2932 | ||||
2933 | ISD::CondCode Condition = getFCmpCondCode(predicate); | |||
2934 | auto *FPMO = dyn_cast<FPMathOperator>(&I); | |||
2935 | if ((FPMO && FPMO->hasNoNaNs()) || TM.Options.NoNaNsFPMath) | |||
2936 | Condition = getFCmpCodeWithoutNaN(Condition); | |||
2937 | ||||
2938 | EVT DestVT = DAG.getTargetLoweringInfo().getValueType(DAG.getDataLayout(), | |||
2939 | I.getType()); | |||
2940 | setValue(&I, DAG.getSetCC(getCurSDLoc(), DestVT, Op1, Op2, Condition)); | |||
2941 | } | |||
2942 | ||||
2943 | // Check if the condition of the select has one use or two users that are both | |||
2944 | // selects with the same condition. | |||
2945 | static bool hasOnlySelectUsers(const Value *Cond) { | |||
2946 | return llvm::all_of(Cond->users(), [](const Value *V) { | |||
2947 | return isa<SelectInst>(V); | |||
2948 | }); | |||
2949 | } | |||
2950 | ||||
2951 | void SelectionDAGBuilder::visitSelect(const User &I) { | |||
2952 | SmallVector<EVT, 4> ValueVTs; | |||
2953 | ComputeValueVTs(DAG.getTargetLoweringInfo(), DAG.getDataLayout(), I.getType(), | |||
2954 | ValueVTs); | |||
2955 | unsigned NumValues = ValueVTs.size(); | |||
2956 | if (NumValues == 0) return; | |||
2957 | ||||
2958 | SmallVector<SDValue, 4> Values(NumValues); | |||
2959 | SDValue Cond = getValue(I.getOperand(0)); | |||
2960 | SDValue LHSVal = getValue(I.getOperand(1)); | |||
2961 | SDValue RHSVal = getValue(I.getOperand(2)); | |||
2962 | auto BaseOps = {Cond}; | |||
2963 | ISD::NodeType OpCode = Cond.getValueType().isVector() ? | |||
2964 | ISD::VSELECT : ISD::SELECT; | |||
2965 | ||||
2966 | // Min/max matching is only viable if all output VTs are the same. | |||
2967 | if (is_splat(ValueVTs)) { | |||
2968 | EVT VT = ValueVTs[0]; | |||
2969 | LLVMContext &Ctx = *DAG.getContext(); | |||
2970 | auto &TLI = DAG.getTargetLoweringInfo(); | |||
2971 | ||||
2972 | // We care about the legality of the operation after it has been type | |||
2973 | // legalized. | |||
2974 | while (TLI.getTypeAction(Ctx, VT) != TargetLoweringBase::TypeLegal && | |||
2975 | VT != TLI.getTypeToTransformTo(Ctx, VT)) | |||
2976 | VT = TLI.getTypeToTransformTo(Ctx, VT); | |||
2977 | ||||
2978 | // If the vselect is legal, assume we want to leave this as a vector setcc + | |||
2979 | // vselect. Otherwise, if this is going to be scalarized, we want to see if | |||
2980 | // min/max is legal on the scalar type. | |||
2981 | bool UseScalarMinMax = VT.isVector() && | |||
2982 | !TLI.isOperationLegalOrCustom(ISD::VSELECT, VT); | |||
2983 | ||||
2984 | Value *LHS, *RHS; | |||
2985 | auto SPR = matchSelectPattern(const_cast<User*>(&I), LHS, RHS); | |||
2986 | ISD::NodeType Opc = ISD::DELETED_NODE; | |||
2987 | switch (SPR.Flavor) { | |||
2988 | case SPF_UMAX: Opc = ISD::UMAX; break; | |||
2989 | case SPF_UMIN: Opc = ISD::UMIN; break; | |||
2990 | case SPF_SMAX: Opc = ISD::SMAX; break; | |||
2991 | case SPF_SMIN: Opc = ISD::SMIN; break; | |||
2992 | case SPF_FMINNUM: | |||
2993 | switch (SPR.NaNBehavior) { | |||
2994 | case SPNB_NA: llvm_unreachable("No NaN behavior for FP op?")::llvm::llvm_unreachable_internal("No NaN behavior for FP op?" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 2994); | |||
2995 | case SPNB_RETURNS_NAN: Opc = ISD::FMINIMUM; break; | |||
2996 | case SPNB_RETURNS_OTHER: Opc = ISD::FMINNUM; break; | |||
2997 | case SPNB_RETURNS_ANY: { | |||
2998 | if (TLI.isOperationLegalOrCustom(ISD::FMINNUM, VT)) | |||
2999 | Opc = ISD::FMINNUM; | |||
3000 | else if (TLI.isOperationLegalOrCustom(ISD::FMINIMUM, VT)) | |||
3001 | Opc = ISD::FMINIMUM; | |||
3002 | else if (UseScalarMinMax) | |||
3003 | Opc = TLI.isOperationLegalOrCustom(ISD::FMINNUM, VT.getScalarType()) ? | |||
3004 | ISD::FMINNUM : ISD::FMINIMUM; | |||
3005 | break; | |||
3006 | } | |||
3007 | } | |||
3008 | break; | |||
3009 | case SPF_FMAXNUM: | |||
3010 | switch (SPR.NaNBehavior) { | |||
3011 | case SPNB_NA: llvm_unreachable("No NaN behavior for FP op?")::llvm::llvm_unreachable_internal("No NaN behavior for FP op?" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 3011); | |||
3012 | case SPNB_RETURNS_NAN: Opc = ISD::FMAXIMUM; break; | |||
3013 | case SPNB_RETURNS_OTHER: Opc = ISD::FMAXNUM; break; | |||
3014 | case SPNB_RETURNS_ANY: | |||
3015 | ||||
3016 | if (TLI.isOperationLegalOrCustom(ISD::FMAXNUM, VT)) | |||
3017 | Opc = ISD::FMAXNUM; | |||
3018 | else if (TLI.isOperationLegalOrCustom(ISD::FMAXIMUM, VT)) | |||
3019 | Opc = ISD::FMAXIMUM; | |||
3020 | else if (UseScalarMinMax) | |||
3021 | Opc = TLI.isOperationLegalOrCustom(ISD::FMAXNUM, VT.getScalarType()) ? | |||
3022 | ISD::FMAXNUM : ISD::FMAXIMUM; | |||
3023 | break; | |||
3024 | } | |||
3025 | break; | |||
3026 | default: break; | |||
3027 | } | |||
3028 | ||||
3029 | if (Opc != ISD::DELETED_NODE && | |||
3030 | (TLI.isOperationLegalOrCustom(Opc, VT) || | |||
3031 | (UseScalarMinMax && | |||
3032 | TLI.isOperationLegalOrCustom(Opc, VT.getScalarType()))) && | |||
3033 | // If the underlying comparison instruction is used by any other | |||
3034 | // instruction, the consumed instructions won't be destroyed, so it is | |||
3035 | // not profitable to convert to a min/max. | |||
3036 | hasOnlySelectUsers(cast<SelectInst>(I).getCondition())) { | |||
3037 | OpCode = Opc; | |||
3038 | LHSVal = getValue(LHS); | |||
3039 | RHSVal = getValue(RHS); | |||
3040 | BaseOps = {}; | |||
3041 | } | |||
3042 | } | |||
3043 | ||||
3044 | for (unsigned i = 0; i != NumValues; ++i) { | |||
3045 | SmallVector<SDValue, 3> Ops(BaseOps.begin(), BaseOps.end()); | |||
3046 | Ops.push_back(SDValue(LHSVal.getNode(), LHSVal.getResNo() + i)); | |||
3047 | Ops.push_back(SDValue(RHSVal.getNode(), RHSVal.getResNo() + i)); | |||
3048 | Values[i] = DAG.getNode(OpCode, getCurSDLoc(), | |||
3049 | LHSVal.getNode()->getValueType(LHSVal.getResNo()+i), | |||
3050 | Ops); | |||
3051 | } | |||
3052 | ||||
3053 | setValue(&I, DAG.getNode(ISD::MERGE_VALUES, getCurSDLoc(), | |||
3054 | DAG.getVTList(ValueVTs), Values)); | |||
3055 | } | |||
3056 | ||||
3057 | void SelectionDAGBuilder::visitTrunc(const User &I) { | |||
3058 | // TruncInst cannot be a no-op cast because sizeof(src) > sizeof(dest). | |||
3059 | SDValue N = getValue(I.getOperand(0)); | |||
3060 | EVT DestVT = DAG.getTargetLoweringInfo().getValueType(DAG.getDataLayout(), | |||
3061 | I.getType()); | |||
3062 | setValue(&I, DAG.getNode(ISD::TRUNCATE, getCurSDLoc(), DestVT, N)); | |||
3063 | } | |||
3064 | ||||
3065 | void SelectionDAGBuilder::visitZExt(const User &I) { | |||
3066 | // ZExt cannot be a no-op cast because sizeof(src) < sizeof(dest). | |||
3067 | // ZExt also can't be a cast to bool for same reason. So, nothing much to do | |||
3068 | SDValue N = getValue(I.getOperand(0)); | |||
3069 | EVT DestVT = DAG.getTargetLoweringInfo().getValueType(DAG.getDataLayout(), | |||
3070 | I.getType()); | |||
3071 | setValue(&I, DAG.getNode(ISD::ZERO_EXTEND, getCurSDLoc(), DestVT, N)); | |||
3072 | } | |||
3073 | ||||
3074 | void SelectionDAGBuilder::visitSExt(const User &I) { | |||
3075 | // SExt cannot be a no-op cast because sizeof(src) < sizeof(dest). | |||
3076 | // SExt also can't be a cast to bool for same reason. So, nothing much to do | |||
3077 | SDValue N = getValue(I.getOperand(0)); | |||
3078 | EVT DestVT = DAG.getTargetLoweringInfo().getValueType(DAG.getDataLayout(), | |||
3079 | I.getType()); | |||
3080 | setValue(&I, DAG.getNode(ISD::SIGN_EXTEND, getCurSDLoc(), DestVT, N)); | |||
3081 | } | |||
3082 | ||||
3083 | void SelectionDAGBuilder::visitFPTrunc(const User &I) { | |||
3084 | // FPTrunc is never a no-op cast, no need to check | |||
3085 | SDValue N = getValue(I.getOperand(0)); | |||
3086 | SDLoc dl = getCurSDLoc(); | |||
3087 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
3088 | EVT DestVT = TLI.getValueType(DAG.getDataLayout(), I.getType()); | |||
3089 | setValue(&I, DAG.getNode(ISD::FP_ROUND, dl, DestVT, N, | |||
3090 | DAG.getTargetConstant( | |||
3091 | 0, dl, TLI.getPointerTy(DAG.getDataLayout())))); | |||
3092 | } | |||
3093 | ||||
3094 | void SelectionDAGBuilder::visitFPExt(const User &I) { | |||
3095 | // FPExt is never a no-op cast, no need to check | |||
3096 | SDValue N = getValue(I.getOperand(0)); | |||
3097 | EVT DestVT = DAG.getTargetLoweringInfo().getValueType(DAG.getDataLayout(), | |||
3098 | I.getType()); | |||
3099 | setValue(&I, DAG.getNode(ISD::FP_EXTEND, getCurSDLoc(), DestVT, N)); | |||
3100 | } | |||
3101 | ||||
3102 | void SelectionDAGBuilder::visitFPToUI(const User &I) { | |||
3103 | // FPToUI is never a no-op cast, no need to check | |||
3104 | SDValue N = getValue(I.getOperand(0)); | |||
3105 | EVT DestVT = DAG.getTargetLoweringInfo().getValueType(DAG.getDataLayout(), | |||
3106 | I.getType()); | |||
3107 | setValue(&I, DAG.getNode(ISD::FP_TO_UINT, getCurSDLoc(), DestVT, N)); | |||
3108 | } | |||
3109 | ||||
3110 | void SelectionDAGBuilder::visitFPToSI(const User &I) { | |||
3111 | // FPToSI is never a no-op cast, no need to check | |||
3112 | SDValue N = getValue(I.getOperand(0)); | |||
3113 | EVT DestVT = DAG.getTargetLoweringInfo().getValueType(DAG.getDataLayout(), | |||
3114 | I.getType()); | |||
3115 | setValue(&I, DAG.getNode(ISD::FP_TO_SINT, getCurSDLoc(), DestVT, N)); | |||
3116 | } | |||
3117 | ||||
3118 | void SelectionDAGBuilder::visitUIToFP(const User &I) { | |||
3119 | // UIToFP is never a no-op cast, no need to check | |||
3120 | SDValue N = getValue(I.getOperand(0)); | |||
3121 | EVT DestVT = DAG.getTargetLoweringInfo().getValueType(DAG.getDataLayout(), | |||
3122 | I.getType()); | |||
3123 | setValue(&I, DAG.getNode(ISD::UINT_TO_FP, getCurSDLoc(), DestVT, N)); | |||
3124 | } | |||
3125 | ||||
3126 | void SelectionDAGBuilder::visitSIToFP(const User &I) { | |||
3127 | // SIToFP is never a no-op cast, no need to check | |||
3128 | SDValue N = getValue(I.getOperand(0)); | |||
3129 | EVT DestVT = DAG.getTargetLoweringInfo().getValueType(DAG.getDataLayout(), | |||
3130 | I.getType()); | |||
3131 | setValue(&I, DAG.getNode(ISD::SINT_TO_FP, getCurSDLoc(), DestVT, N)); | |||
3132 | } | |||
3133 | ||||
3134 | void SelectionDAGBuilder::visitPtrToInt(const User &I) { | |||
3135 | // What to do depends on the size of the integer and the size of the pointer. | |||
3136 | // We can either truncate, zero extend, or no-op, accordingly. | |||
3137 | SDValue N = getValue(I.getOperand(0)); | |||
3138 | EVT DestVT = DAG.getTargetLoweringInfo().getValueType(DAG.getDataLayout(), | |||
3139 | I.getType()); | |||
3140 | setValue(&I, DAG.getZExtOrTrunc(N, getCurSDLoc(), DestVT)); | |||
3141 | } | |||
3142 | ||||
3143 | void SelectionDAGBuilder::visitIntToPtr(const User &I) { | |||
3144 | // What to do depends on the size of the integer and the size of the pointer. | |||
3145 | // We can either truncate, zero extend, or no-op, accordingly. | |||
3146 | SDValue N = getValue(I.getOperand(0)); | |||
3147 | EVT DestVT = DAG.getTargetLoweringInfo().getValueType(DAG.getDataLayout(), | |||
3148 | I.getType()); | |||
3149 | setValue(&I, DAG.getZExtOrTrunc(N, getCurSDLoc(), DestVT)); | |||
3150 | } | |||
3151 | ||||
3152 | void SelectionDAGBuilder::visitBitCast(const User &I) { | |||
3153 | SDValue N = getValue(I.getOperand(0)); | |||
3154 | SDLoc dl = getCurSDLoc(); | |||
3155 | EVT DestVT = DAG.getTargetLoweringInfo().getValueType(DAG.getDataLayout(), | |||
3156 | I.getType()); | |||
3157 | ||||
3158 | // BitCast assures us that source and destination are the same size so this is | |||
3159 | // either a BITCAST or a no-op. | |||
3160 | if (DestVT != N.getValueType()) | |||
3161 | setValue(&I, DAG.getNode(ISD::BITCAST, dl, | |||
3162 | DestVT, N)); // convert types. | |||
3163 | // Check if the original LLVM IR Operand was a ConstantInt, because getValue() | |||
3164 | // might fold any kind of constant expression to an integer constant and that | |||
3165 | // is not what we are looking for. Only recognize a bitcast of a genuine | |||
3166 | // constant integer as an opaque constant. | |||
3167 | else if(ConstantInt *C = dyn_cast<ConstantInt>(I.getOperand(0))) | |||
3168 | setValue(&I, DAG.getConstant(C->getValue(), dl, DestVT, /*isTarget=*/false, | |||
3169 | /*isOpaque*/true)); | |||
3170 | else | |||
3171 | setValue(&I, N); // noop cast. | |||
3172 | } | |||
3173 | ||||
3174 | void SelectionDAGBuilder::visitAddrSpaceCast(const User &I) { | |||
3175 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
3176 | const Value *SV = I.getOperand(0); | |||
3177 | SDValue N = getValue(SV); | |||
3178 | EVT DestVT = TLI.getValueType(DAG.getDataLayout(), I.getType()); | |||
3179 | ||||
3180 | unsigned SrcAS = SV->getType()->getPointerAddressSpace(); | |||
3181 | unsigned DestAS = I.getType()->getPointerAddressSpace(); | |||
3182 | ||||
3183 | if (!TLI.isNoopAddrSpaceCast(SrcAS, DestAS)) | |||
3184 | N = DAG.getAddrSpaceCast(getCurSDLoc(), DestVT, N, SrcAS, DestAS); | |||
3185 | ||||
3186 | setValue(&I, N); | |||
3187 | } | |||
3188 | ||||
3189 | void SelectionDAGBuilder::visitInsertElement(const User &I) { | |||
3190 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
3191 | SDValue InVec = getValue(I.getOperand(0)); | |||
3192 | SDValue InVal = getValue(I.getOperand(1)); | |||
3193 | SDValue InIdx = DAG.getSExtOrTrunc(getValue(I.getOperand(2)), getCurSDLoc(), | |||
3194 | TLI.getVectorIdxTy(DAG.getDataLayout())); | |||
3195 | setValue(&I, DAG.getNode(ISD::INSERT_VECTOR_ELT, getCurSDLoc(), | |||
3196 | TLI.getValueType(DAG.getDataLayout(), I.getType()), | |||
3197 | InVec, InVal, InIdx)); | |||
3198 | } | |||
3199 | ||||
3200 | void SelectionDAGBuilder::visitExtractElement(const User &I) { | |||
3201 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
3202 | SDValue InVec = getValue(I.getOperand(0)); | |||
3203 | SDValue InIdx = DAG.getSExtOrTrunc(getValue(I.getOperand(1)), getCurSDLoc(), | |||
3204 | TLI.getVectorIdxTy(DAG.getDataLayout())); | |||
3205 | setValue(&I, DAG.getNode(ISD::EXTRACT_VECTOR_ELT, getCurSDLoc(), | |||
3206 | TLI.getValueType(DAG.getDataLayout(), I.getType()), | |||
3207 | InVec, InIdx)); | |||
3208 | } | |||
3209 | ||||
3210 | void SelectionDAGBuilder::visitShuffleVector(const User &I) { | |||
3211 | SDValue Src1 = getValue(I.getOperand(0)); | |||
3212 | SDValue Src2 = getValue(I.getOperand(1)); | |||
3213 | SDLoc DL = getCurSDLoc(); | |||
3214 | ||||
3215 | SmallVector<int, 8> Mask; | |||
3216 | ShuffleVectorInst::getShuffleMask(cast<Constant>(I.getOperand(2)), Mask); | |||
3217 | unsigned MaskNumElts = Mask.size(); | |||
3218 | ||||
3219 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
3220 | EVT VT = TLI.getValueType(DAG.getDataLayout(), I.getType()); | |||
3221 | EVT SrcVT = Src1.getValueType(); | |||
3222 | unsigned SrcNumElts = SrcVT.getVectorNumElements(); | |||
3223 | ||||
3224 | if (SrcNumElts == MaskNumElts) { | |||
3225 | setValue(&I, DAG.getVectorShuffle(VT, DL, Src1, Src2, Mask)); | |||
3226 | return; | |||
3227 | } | |||
3228 | ||||
3229 | // Normalize the shuffle vector since mask and vector length don't match. | |||
3230 | if (SrcNumElts < MaskNumElts) { | |||
3231 | // Mask is longer than the source vectors. We can use concatenate vector to | |||
3232 | // make the mask and vectors lengths match. | |||
3233 | ||||
3234 | if (MaskNumElts % SrcNumElts == 0) { | |||
3235 | // Mask length is a multiple of the source vector length. | |||
3236 | // Check if the shuffle is some kind of concatenation of the input | |||
3237 | // vectors. | |||
3238 | unsigned NumConcat = MaskNumElts / SrcNumElts; | |||
3239 | bool IsConcat = true; | |||
3240 | SmallVector<int, 8> ConcatSrcs(NumConcat, -1); | |||
3241 | for (unsigned i = 0; i != MaskNumElts; ++i) { | |||
3242 | int Idx = Mask[i]; | |||
3243 | if (Idx < 0) | |||
3244 | continue; | |||
3245 | // Ensure the indices in each SrcVT sized piece are sequential and that | |||
3246 | // the same source is used for the whole piece. | |||
3247 | if ((Idx % SrcNumElts != (i % SrcNumElts)) || | |||
3248 | (ConcatSrcs[i / SrcNumElts] >= 0 && | |||
3249 | ConcatSrcs[i / SrcNumElts] != (int)(Idx / SrcNumElts))) { | |||
3250 | IsConcat = false; | |||
3251 | break; | |||
3252 | } | |||
3253 | // Remember which source this index came from. | |||
3254 | ConcatSrcs[i / SrcNumElts] = Idx / SrcNumElts; | |||
3255 | } | |||
3256 | ||||
3257 | // The shuffle is concatenating multiple vectors together. Just emit | |||
3258 | // a CONCAT_VECTORS operation. | |||
3259 | if (IsConcat) { | |||
3260 | SmallVector<SDValue, 8> ConcatOps; | |||
3261 | for (auto Src : ConcatSrcs) { | |||
3262 | if (Src < 0) | |||
3263 | ConcatOps.push_back(DAG.getUNDEF(SrcVT)); | |||
3264 | else if (Src == 0) | |||
3265 | ConcatOps.push_back(Src1); | |||
3266 | else | |||
3267 | ConcatOps.push_back(Src2); | |||
3268 | } | |||
3269 | setValue(&I, DAG.getNode(ISD::CONCAT_VECTORS, DL, VT, ConcatOps)); | |||
3270 | return; | |||
3271 | } | |||
3272 | } | |||
3273 | ||||
3274 | unsigned PaddedMaskNumElts = alignTo(MaskNumElts, SrcNumElts); | |||
3275 | unsigned NumConcat = PaddedMaskNumElts / SrcNumElts; | |||
3276 | EVT PaddedVT = EVT::getVectorVT(*DAG.getContext(), VT.getScalarType(), | |||
3277 | PaddedMaskNumElts); | |||
3278 | ||||
3279 | // Pad both vectors with undefs to make them the same length as the mask. | |||
3280 | SDValue UndefVal = DAG.getUNDEF(SrcVT); | |||
3281 | ||||
3282 | SmallVector<SDValue, 8> MOps1(NumConcat, UndefVal); | |||
3283 | SmallVector<SDValue, 8> MOps2(NumConcat, UndefVal); | |||
3284 | MOps1[0] = Src1; | |||
3285 | MOps2[0] = Src2; | |||
3286 | ||||
3287 | Src1 = Src1.isUndef() | |||
3288 | ? DAG.getUNDEF(PaddedVT) | |||
3289 | : DAG.getNode(ISD::CONCAT_VECTORS, DL, PaddedVT, MOps1); | |||
3290 | Src2 = Src2.isUndef() | |||
3291 | ? DAG.getUNDEF(PaddedVT) | |||
3292 | : DAG.getNode(ISD::CONCAT_VECTORS, DL, PaddedVT, MOps2); | |||
3293 | ||||
3294 | // Readjust mask for new input vector length. | |||
3295 | SmallVector<int, 8> MappedOps(PaddedMaskNumElts, -1); | |||
3296 | for (unsigned i = 0; i != MaskNumElts; ++i) { | |||
3297 | int Idx = Mask[i]; | |||
3298 | if (Idx >= (int)SrcNumElts) | |||
3299 | Idx -= SrcNumElts - PaddedMaskNumElts; | |||
3300 | MappedOps[i] = Idx; | |||
3301 | } | |||
3302 | ||||
3303 | SDValue Result = DAG.getVectorShuffle(PaddedVT, DL, Src1, Src2, MappedOps); | |||
3304 | ||||
3305 | // If the concatenated vector was padded, extract a subvector with the | |||
3306 | // correct number of elements. | |||
3307 | if (MaskNumElts != PaddedMaskNumElts) | |||
3308 | Result = DAG.getNode( | |||
3309 | ISD::EXTRACT_SUBVECTOR, DL, VT, Result, | |||
3310 | DAG.getConstant(0, DL, TLI.getVectorIdxTy(DAG.getDataLayout()))); | |||
3311 | ||||
3312 | setValue(&I, Result); | |||
3313 | return; | |||
3314 | } | |||
3315 | ||||
3316 | if (SrcNumElts > MaskNumElts) { | |||
3317 | // Analyze the access pattern of the vector to see if we can extract | |||
3318 | // two subvectors and do the shuffle. | |||
3319 | int StartIdx[2] = { -1, -1 }; // StartIdx to extract from | |||
3320 | bool CanExtract = true; | |||
3321 | for (int Idx : Mask) { | |||
3322 | unsigned Input = 0; | |||
3323 | if (Idx < 0) | |||
3324 | continue; | |||
3325 | ||||
3326 | if (Idx >= (int)SrcNumElts) { | |||
3327 | Input = 1; | |||
3328 | Idx -= SrcNumElts; | |||
3329 | } | |||
3330 | ||||
3331 | // If all the indices come from the same MaskNumElts sized portion of | |||
3332 | // the sources we can use extract. Also make sure the extract wouldn't | |||
3333 | // extract past the end of the source. | |||
3334 | int NewStartIdx = alignDown(Idx, MaskNumElts); | |||
3335 | if (NewStartIdx + MaskNumElts > SrcNumElts || | |||
3336 | (StartIdx[Input] >= 0 && StartIdx[Input] != NewStartIdx)) | |||
3337 | CanExtract = false; | |||
3338 | // Make sure we always update StartIdx as we use it to track if all | |||
3339 | // elements are undef. | |||
3340 | StartIdx[Input] = NewStartIdx; | |||
3341 | } | |||
3342 | ||||
3343 | if (StartIdx[0] < 0 && StartIdx[1] < 0) { | |||
3344 | setValue(&I, DAG.getUNDEF(VT)); // Vectors are not used. | |||
3345 | return; | |||
3346 | } | |||
3347 | if (CanExtract) { | |||
3348 | // Extract appropriate subvector and generate a vector shuffle | |||
3349 | for (unsigned Input = 0; Input < 2; ++Input) { | |||
3350 | SDValue &Src = Input == 0 ? Src1 : Src2; | |||
3351 | if (StartIdx[Input] < 0) | |||
3352 | Src = DAG.getUNDEF(VT); | |||
3353 | else { | |||
3354 | Src = DAG.getNode( | |||
3355 | ISD::EXTRACT_SUBVECTOR, DL, VT, Src, | |||
3356 | DAG.getConstant(StartIdx[Input], DL, | |||
3357 | TLI.getVectorIdxTy(DAG.getDataLayout()))); | |||
3358 | } | |||
3359 | } | |||
3360 | ||||
3361 | // Calculate new mask. | |||
3362 | SmallVector<int, 8> MappedOps(Mask.begin(), Mask.end()); | |||
3363 | for (int &Idx : MappedOps) { | |||
3364 | if (Idx >= (int)SrcNumElts) | |||
3365 | Idx -= SrcNumElts + StartIdx[1] - MaskNumElts; | |||
3366 | else if (Idx >= 0) | |||
3367 | Idx -= StartIdx[0]; | |||
3368 | } | |||
3369 | ||||
3370 | setValue(&I, DAG.getVectorShuffle(VT, DL, Src1, Src2, MappedOps)); | |||
3371 | return; | |||
3372 | } | |||
3373 | } | |||
3374 | ||||
3375 | // We can't use either concat vectors or extract subvectors so fall back to | |||
3376 | // replacing the shuffle with extract and build vector. | |||
3377 | // to insert and build vector. | |||
3378 | EVT EltVT = VT.getVectorElementType(); | |||
3379 | EVT IdxVT = TLI.getVectorIdxTy(DAG.getDataLayout()); | |||
3380 | SmallVector<SDValue,8> Ops; | |||
3381 | for (int Idx : Mask) { | |||
3382 | SDValue Res; | |||
3383 | ||||
3384 | if (Idx < 0) { | |||
3385 | Res = DAG.getUNDEF(EltVT); | |||
3386 | } else { | |||
3387 | SDValue &Src = Idx < (int)SrcNumElts ? Src1 : Src2; | |||
3388 | if (Idx >= (int)SrcNumElts) Idx -= SrcNumElts; | |||
3389 | ||||
3390 | Res = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, | |||
3391 | EltVT, Src, DAG.getConstant(Idx, DL, IdxVT)); | |||
3392 | } | |||
3393 | ||||
3394 | Ops.push_back(Res); | |||
3395 | } | |||
3396 | ||||
3397 | setValue(&I, DAG.getBuildVector(VT, DL, Ops)); | |||
3398 | } | |||
3399 | ||||
3400 | void SelectionDAGBuilder::visitInsertValue(const User &I) { | |||
3401 | ArrayRef<unsigned> Indices; | |||
3402 | if (const InsertValueInst *IV = dyn_cast<InsertValueInst>(&I)) | |||
3403 | Indices = IV->getIndices(); | |||
3404 | else | |||
3405 | Indices = cast<ConstantExpr>(&I)->getIndices(); | |||
3406 | ||||
3407 | const Value *Op0 = I.getOperand(0); | |||
3408 | const Value *Op1 = I.getOperand(1); | |||
3409 | Type *AggTy = I.getType(); | |||
3410 | Type *ValTy = Op1->getType(); | |||
3411 | bool IntoUndef = isa<UndefValue>(Op0); | |||
3412 | bool FromUndef = isa<UndefValue>(Op1); | |||
3413 | ||||
3414 | unsigned LinearIndex = ComputeLinearIndex(AggTy, Indices); | |||
3415 | ||||
3416 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
3417 | SmallVector<EVT, 4> AggValueVTs; | |||
3418 | ComputeValueVTs(TLI, DAG.getDataLayout(), AggTy, AggValueVTs); | |||
3419 | SmallVector<EVT, 4> ValValueVTs; | |||
3420 | ComputeValueVTs(TLI, DAG.getDataLayout(), ValTy, ValValueVTs); | |||
3421 | ||||
3422 | unsigned NumAggValues = AggValueVTs.size(); | |||
3423 | unsigned NumValValues = ValValueVTs.size(); | |||
3424 | SmallVector<SDValue, 4> Values(NumAggValues); | |||
3425 | ||||
3426 | // Ignore an insertvalue that produces an empty object | |||
3427 | if (!NumAggValues) { | |||
3428 | setValue(&I, DAG.getUNDEF(MVT(MVT::Other))); | |||
3429 | return; | |||
3430 | } | |||
3431 | ||||
3432 | SDValue Agg = getValue(Op0); | |||
3433 | unsigned i = 0; | |||
3434 | // Copy the beginning value(s) from the original aggregate. | |||
3435 | for (; i != LinearIndex; ++i) | |||
3436 | Values[i] = IntoUndef ? DAG.getUNDEF(AggValueVTs[i]) : | |||
3437 | SDValue(Agg.getNode(), Agg.getResNo() + i); | |||
3438 | // Copy values from the inserted value(s). | |||
3439 | if (NumValValues) { | |||
3440 | SDValue Val = getValue(Op1); | |||
3441 | for (; i != LinearIndex + NumValValues; ++i) | |||
3442 | Values[i] = FromUndef ? DAG.getUNDEF(AggValueVTs[i]) : | |||
3443 | SDValue(Val.getNode(), Val.getResNo() + i - LinearIndex); | |||
3444 | } | |||
3445 | // Copy remaining value(s) from the original aggregate. | |||
3446 | for (; i != NumAggValues; ++i) | |||
3447 | Values[i] = IntoUndef ? DAG.getUNDEF(AggValueVTs[i]) : | |||
3448 | SDValue(Agg.getNode(), Agg.getResNo() + i); | |||
3449 | ||||
3450 | setValue(&I, DAG.getNode(ISD::MERGE_VALUES, getCurSDLoc(), | |||
3451 | DAG.getVTList(AggValueVTs), Values)); | |||
3452 | } | |||
3453 | ||||
3454 | void SelectionDAGBuilder::visitExtractValue(const User &I) { | |||
3455 | ArrayRef<unsigned> Indices; | |||
3456 | if (const ExtractValueInst *EV = dyn_cast<ExtractValueInst>(&I)) | |||
3457 | Indices = EV->getIndices(); | |||
3458 | else | |||
3459 | Indices = cast<ConstantExpr>(&I)->getIndices(); | |||
3460 | ||||
3461 | const Value *Op0 = I.getOperand(0); | |||
3462 | Type *AggTy = Op0->getType(); | |||
3463 | Type *ValTy = I.getType(); | |||
3464 | bool OutOfUndef = isa<UndefValue>(Op0); | |||
3465 | ||||
3466 | unsigned LinearIndex = ComputeLinearIndex(AggTy, Indices); | |||
3467 | ||||
3468 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
3469 | SmallVector<EVT, 4> ValValueVTs; | |||
3470 | ComputeValueVTs(TLI, DAG.getDataLayout(), ValTy, ValValueVTs); | |||
3471 | ||||
3472 | unsigned NumValValues = ValValueVTs.size(); | |||
3473 | ||||
3474 | // Ignore a extractvalue that produces an empty object | |||
3475 | if (!NumValValues) { | |||
3476 | setValue(&I, DAG.getUNDEF(MVT(MVT::Other))); | |||
3477 | return; | |||
3478 | } | |||
3479 | ||||
3480 | SmallVector<SDValue, 4> Values(NumValValues); | |||
3481 | ||||
3482 | SDValue Agg = getValue(Op0); | |||
3483 | // Copy out the selected value(s). | |||
3484 | for (unsigned i = LinearIndex; i != LinearIndex + NumValValues; ++i) | |||
3485 | Values[i - LinearIndex] = | |||
3486 | OutOfUndef ? | |||
3487 | DAG.getUNDEF(Agg.getNode()->getValueType(Agg.getResNo() + i)) : | |||
3488 | SDValue(Agg.getNode(), Agg.getResNo() + i); | |||
3489 | ||||
3490 | setValue(&I, DAG.getNode(ISD::MERGE_VALUES, getCurSDLoc(), | |||
3491 | DAG.getVTList(ValValueVTs), Values)); | |||
3492 | } | |||
3493 | ||||
3494 | void SelectionDAGBuilder::visitGetElementPtr(const User &I) { | |||
3495 | Value *Op0 = I.getOperand(0); | |||
3496 | // Note that the pointer operand may be a vector of pointers. Take the scalar | |||
3497 | // element which holds a pointer. | |||
3498 | unsigned AS = Op0->getType()->getScalarType()->getPointerAddressSpace(); | |||
3499 | SDValue N = getValue(Op0); | |||
3500 | SDLoc dl = getCurSDLoc(); | |||
3501 | ||||
3502 | // Normalize Vector GEP - all scalar operands should be converted to the | |||
3503 | // splat vector. | |||
3504 | unsigned VectorWidth = I.getType()->isVectorTy() ? | |||
3505 | cast<VectorType>(I.getType())->getVectorNumElements() : 0; | |||
3506 | ||||
3507 | if (VectorWidth && !N.getValueType().isVector()) { | |||
3508 | LLVMContext &Context = *DAG.getContext(); | |||
3509 | EVT VT = EVT::getVectorVT(Context, N.getValueType(), VectorWidth); | |||
3510 | N = DAG.getSplatBuildVector(VT, dl, N); | |||
3511 | } | |||
3512 | ||||
3513 | for (gep_type_iterator GTI = gep_type_begin(&I), E = gep_type_end(&I); | |||
3514 | GTI != E; ++GTI) { | |||
3515 | const Value *Idx = GTI.getOperand(); | |||
3516 | if (StructType *StTy = GTI.getStructTypeOrNull()) { | |||
3517 | unsigned Field = cast<Constant>(Idx)->getUniqueInteger().getZExtValue(); | |||
3518 | if (Field) { | |||
3519 | // N = N + Offset | |||
3520 | uint64_t Offset = DL->getStructLayout(StTy)->getElementOffset(Field); | |||
3521 | ||||
3522 | // In an inbounds GEP with an offset that is nonnegative even when | |||
3523 | // interpreted as signed, assume there is no unsigned overflow. | |||
3524 | SDNodeFlags Flags; | |||
3525 | if (int64_t(Offset) >= 0 && cast<GEPOperator>(I).isInBounds()) | |||
3526 | Flags.setNoUnsignedWrap(true); | |||
3527 | ||||
3528 | N = DAG.getNode(ISD::ADD, dl, N.getValueType(), N, | |||
3529 | DAG.getConstant(Offset, dl, N.getValueType()), Flags); | |||
3530 | } | |||
3531 | } else { | |||
3532 | unsigned IdxSize = DAG.getDataLayout().getIndexSizeInBits(AS); | |||
3533 | MVT IdxTy = MVT::getIntegerVT(IdxSize); | |||
3534 | APInt ElementSize(IdxSize, DL->getTypeAllocSize(GTI.getIndexedType())); | |||
3535 | ||||
3536 | // If this is a scalar constant or a splat vector of constants, | |||
3537 | // handle it quickly. | |||
3538 | const auto *CI = dyn_cast<ConstantInt>(Idx); | |||
3539 | if (!CI && isa<ConstantDataVector>(Idx) && | |||
3540 | cast<ConstantDataVector>(Idx)->getSplatValue()) | |||
3541 | CI = cast<ConstantInt>(cast<ConstantDataVector>(Idx)->getSplatValue()); | |||
3542 | ||||
3543 | if (CI) { | |||
3544 | if (CI->isZero()) | |||
3545 | continue; | |||
3546 | APInt Offs = ElementSize * CI->getValue().sextOrTrunc(IdxSize); | |||
3547 | LLVMContext &Context = *DAG.getContext(); | |||
3548 | SDValue OffsVal = VectorWidth ? | |||
3549 | DAG.getConstant(Offs, dl, EVT::getVectorVT(Context, IdxTy, VectorWidth)) : | |||
3550 | DAG.getConstant(Offs, dl, IdxTy); | |||
3551 | ||||
3552 | // In an inbouds GEP with an offset that is nonnegative even when | |||
3553 | // interpreted as signed, assume there is no unsigned overflow. | |||
3554 | SDNodeFlags Flags; | |||
3555 | if (Offs.isNonNegative() && cast<GEPOperator>(I).isInBounds()) | |||
3556 | Flags.setNoUnsignedWrap(true); | |||
3557 | ||||
3558 | N = DAG.getNode(ISD::ADD, dl, N.getValueType(), N, OffsVal, Flags); | |||
3559 | continue; | |||
3560 | } | |||
3561 | ||||
3562 | // N = N + Idx * ElementSize; | |||
3563 | SDValue IdxN = getValue(Idx); | |||
3564 | ||||
3565 | if (!IdxN.getValueType().isVector() && VectorWidth) { | |||
3566 | EVT VT = EVT::getVectorVT(*Context, IdxN.getValueType(), VectorWidth); | |||
3567 | IdxN = DAG.getSplatBuildVector(VT, dl, IdxN); | |||
3568 | } | |||
3569 | ||||
3570 | // If the index is smaller or larger than intptr_t, truncate or extend | |||
3571 | // it. | |||
3572 | IdxN = DAG.getSExtOrTrunc(IdxN, dl, N.getValueType()); | |||
3573 | ||||
3574 | // If this is a multiply by a power of two, turn it into a shl | |||
3575 | // immediately. This is a very common case. | |||
3576 | if (ElementSize != 1) { | |||
3577 | if (ElementSize.isPowerOf2()) { | |||
3578 | unsigned Amt = ElementSize.logBase2(); | |||
3579 | IdxN = DAG.getNode(ISD::SHL, dl, | |||
3580 | N.getValueType(), IdxN, | |||
3581 | DAG.getConstant(Amt, dl, IdxN.getValueType())); | |||
3582 | } else { | |||
3583 | SDValue Scale = DAG.getConstant(ElementSize, dl, IdxN.getValueType()); | |||
3584 | IdxN = DAG.getNode(ISD::MUL, dl, | |||
3585 | N.getValueType(), IdxN, Scale); | |||
3586 | } | |||
3587 | } | |||
3588 | ||||
3589 | N = DAG.getNode(ISD::ADD, dl, | |||
3590 | N.getValueType(), N, IdxN); | |||
3591 | } | |||
3592 | } | |||
3593 | ||||
3594 | setValue(&I, N); | |||
3595 | } | |||
3596 | ||||
3597 | void SelectionDAGBuilder::visitAlloca(const AllocaInst &I) { | |||
3598 | // If this is a fixed sized alloca in the entry block of the function, | |||
3599 | // allocate it statically on the stack. | |||
3600 | if (FuncInfo.StaticAllocaMap.count(&I)) | |||
3601 | return; // getValue will auto-populate this. | |||
3602 | ||||
3603 | SDLoc dl = getCurSDLoc(); | |||
3604 | Type *Ty = I.getAllocatedType(); | |||
3605 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
3606 | auto &DL = DAG.getDataLayout(); | |||
3607 | uint64_t TySize = DL.getTypeAllocSize(Ty); | |||
3608 | unsigned Align = | |||
3609 | std::max((unsigned)DL.getPrefTypeAlignment(Ty), I.getAlignment()); | |||
3610 | ||||
3611 | SDValue AllocSize = getValue(I.getArraySize()); | |||
3612 | ||||
3613 | EVT IntPtr = TLI.getPointerTy(DAG.getDataLayout(), DL.getAllocaAddrSpace()); | |||
3614 | if (AllocSize.getValueType() != IntPtr) | |||
3615 | AllocSize = DAG.getZExtOrTrunc(AllocSize, dl, IntPtr); | |||
3616 | ||||
3617 | AllocSize = DAG.getNode(ISD::MUL, dl, IntPtr, | |||
3618 | AllocSize, | |||
3619 | DAG.getConstant(TySize, dl, IntPtr)); | |||
3620 | ||||
3621 | // Handle alignment. If the requested alignment is less than or equal to | |||
3622 | // the stack alignment, ignore it. If the size is greater than or equal to | |||
3623 | // the stack alignment, we note this in the DYNAMIC_STACKALLOC node. | |||
3624 | unsigned StackAlign = | |||
3625 | DAG.getSubtarget().getFrameLowering()->getStackAlignment(); | |||
3626 | if (Align <= StackAlign) | |||
3627 | Align = 0; | |||
3628 | ||||
3629 | // Round the size of the allocation up to the stack alignment size | |||
3630 | // by add SA-1 to the size. This doesn't overflow because we're computing | |||
3631 | // an address inside an alloca. | |||
3632 | SDNodeFlags Flags; | |||
3633 | Flags.setNoUnsignedWrap(true); | |||
3634 | AllocSize = DAG.getNode(ISD::ADD, dl, AllocSize.getValueType(), AllocSize, | |||
3635 | DAG.getConstant(StackAlign - 1, dl, IntPtr), Flags); | |||
3636 | ||||
3637 | // Mask out the low bits for alignment purposes. | |||
3638 | AllocSize = | |||
3639 | DAG.getNode(ISD::AND, dl, AllocSize.getValueType(), AllocSize, | |||
3640 | DAG.getConstant(~(uint64_t)(StackAlign - 1), dl, IntPtr)); | |||
3641 | ||||
3642 | SDValue Ops[] = {getRoot(), AllocSize, DAG.getConstant(Align, dl, IntPtr)}; | |||
3643 | SDVTList VTs = DAG.getVTList(AllocSize.getValueType(), MVT::Other); | |||
3644 | SDValue DSA = DAG.getNode(ISD::DYNAMIC_STACKALLOC, dl, VTs, Ops); | |||
3645 | setValue(&I, DSA); | |||
3646 | DAG.setRoot(DSA.getValue(1)); | |||
3647 | ||||
3648 | assert(FuncInfo.MF->getFrameInfo().hasVarSizedObjects())((FuncInfo.MF->getFrameInfo().hasVarSizedObjects()) ? static_cast <void> (0) : __assert_fail ("FuncInfo.MF->getFrameInfo().hasVarSizedObjects()" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 3648, __PRETTY_FUNCTION__)); | |||
3649 | } | |||
3650 | ||||
3651 | void SelectionDAGBuilder::visitLoad(const LoadInst &I) { | |||
3652 | if (I.isAtomic()) | |||
3653 | return visitAtomicLoad(I); | |||
3654 | ||||
3655 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
3656 | const Value *SV = I.getOperand(0); | |||
3657 | if (TLI.supportSwiftError()) { | |||
3658 | // Swifterror values can come from either a function parameter with | |||
3659 | // swifterror attribute or an alloca with swifterror attribute. | |||
3660 | if (const Argument *Arg = dyn_cast<Argument>(SV)) { | |||
3661 | if (Arg->hasSwiftErrorAttr()) | |||
3662 | return visitLoadFromSwiftError(I); | |||
3663 | } | |||
3664 | ||||
3665 | if (const AllocaInst *Alloca = dyn_cast<AllocaInst>(SV)) { | |||
3666 | if (Alloca->isSwiftError()) | |||
3667 | return visitLoadFromSwiftError(I); | |||
3668 | } | |||
3669 | } | |||
3670 | ||||
3671 | SDValue Ptr = getValue(SV); | |||
3672 | ||||
3673 | Type *Ty = I.getType(); | |||
3674 | ||||
3675 | bool isVolatile = I.isVolatile(); | |||
3676 | bool isNonTemporal = I.getMetadata(LLVMContext::MD_nontemporal) != nullptr; | |||
3677 | bool isInvariant = I.getMetadata(LLVMContext::MD_invariant_load) != nullptr; | |||
3678 | bool isDereferenceable = isDereferenceablePointer(SV, DAG.getDataLayout()); | |||
3679 | unsigned Alignment = I.getAlignment(); | |||
3680 | ||||
3681 | AAMDNodes AAInfo; | |||
3682 | I.getAAMetadata(AAInfo); | |||
3683 | const MDNode *Ranges = I.getMetadata(LLVMContext::MD_range); | |||
3684 | ||||
3685 | SmallVector<EVT, 4> ValueVTs; | |||
3686 | SmallVector<uint64_t, 4> Offsets; | |||
3687 | ComputeValueVTs(TLI, DAG.getDataLayout(), Ty, ValueVTs, &Offsets); | |||
3688 | unsigned NumValues = ValueVTs.size(); | |||
3689 | if (NumValues == 0) | |||
3690 | return; | |||
3691 | ||||
3692 | SDValue Root; | |||
3693 | bool ConstantMemory = false; | |||
3694 | if (isVolatile || NumValues > MaxParallelChains) | |||
3695 | // Serialize volatile loads with other side effects. | |||
3696 | Root = getRoot(); | |||
3697 | else if (AA && | |||
3698 | AA->pointsToConstantMemory(MemoryLocation( | |||
3699 | SV, | |||
3700 | LocationSize::precise(DAG.getDataLayout().getTypeStoreSize(Ty)), | |||
3701 | AAInfo))) { | |||
3702 | // Do not serialize (non-volatile) loads of constant memory with anything. | |||
3703 | Root = DAG.getEntryNode(); | |||
3704 | ConstantMemory = true; | |||
3705 | } else { | |||
3706 | // Do not serialize non-volatile loads against each other. | |||
3707 | Root = DAG.getRoot(); | |||
3708 | } | |||
3709 | ||||
3710 | SDLoc dl = getCurSDLoc(); | |||
3711 | ||||
3712 | if (isVolatile) | |||
3713 | Root = TLI.prepareVolatileOrAtomicLoad(Root, dl, DAG); | |||
3714 | ||||
3715 | // An aggregate load cannot wrap around the address space, so offsets to its | |||
3716 | // parts don't wrap either. | |||
3717 | SDNodeFlags Flags; | |||
3718 | Flags.setNoUnsignedWrap(true); | |||
3719 | ||||
3720 | SmallVector<SDValue, 4> Values(NumValues); | |||
3721 | SmallVector<SDValue, 4> Chains(std::min(MaxParallelChains, NumValues)); | |||
3722 | EVT PtrVT = Ptr.getValueType(); | |||
3723 | unsigned ChainI = 0; | |||
3724 | for (unsigned i = 0; i != NumValues; ++i, ++ChainI) { | |||
3725 | // Serializing loads here may result in excessive register pressure, and | |||
3726 | // TokenFactor places arbitrary choke points on the scheduler. SD scheduling | |||
3727 | // could recover a bit by hoisting nodes upward in the chain by recognizing | |||
3728 | // they are side-effect free or do not alias. The optimizer should really | |||
3729 | // avoid this case by converting large object/array copies to llvm.memcpy | |||
3730 | // (MaxParallelChains should always remain as failsafe). | |||
3731 | if (ChainI == MaxParallelChains) { | |||
3732 | assert(PendingLoads.empty() && "PendingLoads must be serialized first")((PendingLoads.empty() && "PendingLoads must be serialized first" ) ? static_cast<void> (0) : __assert_fail ("PendingLoads.empty() && \"PendingLoads must be serialized first\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 3732, __PRETTY_FUNCTION__)); | |||
3733 | SDValue Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, | |||
3734 | makeArrayRef(Chains.data(), ChainI)); | |||
3735 | Root = Chain; | |||
3736 | ChainI = 0; | |||
3737 | } | |||
3738 | SDValue A = DAG.getNode(ISD::ADD, dl, | |||
3739 | PtrVT, Ptr, | |||
3740 | DAG.getConstant(Offsets[i], dl, PtrVT), | |||
3741 | Flags); | |||
3742 | auto MMOFlags = MachineMemOperand::MONone; | |||
3743 | if (isVolatile) | |||
3744 | MMOFlags |= MachineMemOperand::MOVolatile; | |||
3745 | if (isNonTemporal) | |||
3746 | MMOFlags |= MachineMemOperand::MONonTemporal; | |||
3747 | if (isInvariant) | |||
3748 | MMOFlags |= MachineMemOperand::MOInvariant; | |||
3749 | if (isDereferenceable) | |||
3750 | MMOFlags |= MachineMemOperand::MODereferenceable; | |||
3751 | MMOFlags |= TLI.getMMOFlags(I); | |||
3752 | ||||
3753 | SDValue L = DAG.getLoad(ValueVTs[i], dl, Root, A, | |||
3754 | MachinePointerInfo(SV, Offsets[i]), Alignment, | |||
3755 | MMOFlags, AAInfo, Ranges); | |||
3756 | ||||
3757 | Values[i] = L; | |||
3758 | Chains[ChainI] = L.getValue(1); | |||
3759 | } | |||
3760 | ||||
3761 | if (!ConstantMemory) { | |||
3762 | SDValue Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, | |||
3763 | makeArrayRef(Chains.data(), ChainI)); | |||
3764 | if (isVolatile) | |||
3765 | DAG.setRoot(Chain); | |||
3766 | else | |||
3767 | PendingLoads.push_back(Chain); | |||
3768 | } | |||
3769 | ||||
3770 | setValue(&I, DAG.getNode(ISD::MERGE_VALUES, dl, | |||
3771 | DAG.getVTList(ValueVTs), Values)); | |||
3772 | } | |||
3773 | ||||
3774 | void SelectionDAGBuilder::visitStoreToSwiftError(const StoreInst &I) { | |||
3775 | assert(DAG.getTargetLoweringInfo().supportSwiftError() &&((DAG.getTargetLoweringInfo().supportSwiftError() && "call visitStoreToSwiftError when backend supports swifterror" ) ? static_cast<void> (0) : __assert_fail ("DAG.getTargetLoweringInfo().supportSwiftError() && \"call visitStoreToSwiftError when backend supports swifterror\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 3776, __PRETTY_FUNCTION__)) | |||
3776 | "call visitStoreToSwiftError when backend supports swifterror")((DAG.getTargetLoweringInfo().supportSwiftError() && "call visitStoreToSwiftError when backend supports swifterror" ) ? static_cast<void> (0) : __assert_fail ("DAG.getTargetLoweringInfo().supportSwiftError() && \"call visitStoreToSwiftError when backend supports swifterror\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 3776, __PRETTY_FUNCTION__)); | |||
3777 | ||||
3778 | SmallVector<EVT, 4> ValueVTs; | |||
3779 | SmallVector<uint64_t, 4> Offsets; | |||
3780 | const Value *SrcV = I.getOperand(0); | |||
3781 | ComputeValueVTs(DAG.getTargetLoweringInfo(), DAG.getDataLayout(), | |||
3782 | SrcV->getType(), ValueVTs, &Offsets); | |||
3783 | assert(ValueVTs.size() == 1 && Offsets[0] == 0 &&((ValueVTs.size() == 1 && Offsets[0] == 0 && "expect a single EVT for swifterror" ) ? static_cast<void> (0) : __assert_fail ("ValueVTs.size() == 1 && Offsets[0] == 0 && \"expect a single EVT for swifterror\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 3784, __PRETTY_FUNCTION__)) | |||
3784 | "expect a single EVT for swifterror")((ValueVTs.size() == 1 && Offsets[0] == 0 && "expect a single EVT for swifterror" ) ? static_cast<void> (0) : __assert_fail ("ValueVTs.size() == 1 && Offsets[0] == 0 && \"expect a single EVT for swifterror\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 3784, __PRETTY_FUNCTION__)); | |||
3785 | ||||
3786 | SDValue Src = getValue(SrcV); | |||
3787 | // Create a virtual register, then update the virtual register. | |||
3788 | unsigned VReg; bool CreatedVReg; | |||
3789 | std::tie(VReg, CreatedVReg) = FuncInfo.getOrCreateSwiftErrorVRegDefAt(&I); | |||
3790 | // Chain, DL, Reg, N or Chain, DL, Reg, N, Glue | |||
3791 | // Chain can be getRoot or getControlRoot. | |||
3792 | SDValue CopyNode = DAG.getCopyToReg(getRoot(), getCurSDLoc(), VReg, | |||
3793 | SDValue(Src.getNode(), Src.getResNo())); | |||
3794 | DAG.setRoot(CopyNode); | |||
3795 | if (CreatedVReg) | |||
3796 | FuncInfo.setCurrentSwiftErrorVReg(FuncInfo.MBB, I.getOperand(1), VReg); | |||
3797 | } | |||
3798 | ||||
3799 | void SelectionDAGBuilder::visitLoadFromSwiftError(const LoadInst &I) { | |||
3800 | assert(DAG.getTargetLoweringInfo().supportSwiftError() &&((DAG.getTargetLoweringInfo().supportSwiftError() && "call visitLoadFromSwiftError when backend supports swifterror" ) ? static_cast<void> (0) : __assert_fail ("DAG.getTargetLoweringInfo().supportSwiftError() && \"call visitLoadFromSwiftError when backend supports swifterror\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 3801, __PRETTY_FUNCTION__)) | |||
3801 | "call visitLoadFromSwiftError when backend supports swifterror")((DAG.getTargetLoweringInfo().supportSwiftError() && "call visitLoadFromSwiftError when backend supports swifterror" ) ? static_cast<void> (0) : __assert_fail ("DAG.getTargetLoweringInfo().supportSwiftError() && \"call visitLoadFromSwiftError when backend supports swifterror\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 3801, __PRETTY_FUNCTION__)); | |||
3802 | ||||
3803 | assert(!I.isVolatile() &&((!I.isVolatile() && I.getMetadata(LLVMContext::MD_nontemporal ) == nullptr && I.getMetadata(LLVMContext::MD_invariant_load ) == nullptr && "Support volatile, non temporal, invariant for load_from_swift_error" ) ? static_cast<void> (0) : __assert_fail ("!I.isVolatile() && I.getMetadata(LLVMContext::MD_nontemporal) == nullptr && I.getMetadata(LLVMContext::MD_invariant_load) == nullptr && \"Support volatile, non temporal, invariant for load_from_swift_error\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 3806, __PRETTY_FUNCTION__)) | |||
3804 | I.getMetadata(LLVMContext::MD_nontemporal) == nullptr &&((!I.isVolatile() && I.getMetadata(LLVMContext::MD_nontemporal ) == nullptr && I.getMetadata(LLVMContext::MD_invariant_load ) == nullptr && "Support volatile, non temporal, invariant for load_from_swift_error" ) ? static_cast<void> (0) : __assert_fail ("!I.isVolatile() && I.getMetadata(LLVMContext::MD_nontemporal) == nullptr && I.getMetadata(LLVMContext::MD_invariant_load) == nullptr && \"Support volatile, non temporal, invariant for load_from_swift_error\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 3806, __PRETTY_FUNCTION__)) | |||
3805 | I.getMetadata(LLVMContext::MD_invariant_load) == nullptr &&((!I.isVolatile() && I.getMetadata(LLVMContext::MD_nontemporal ) == nullptr && I.getMetadata(LLVMContext::MD_invariant_load ) == nullptr && "Support volatile, non temporal, invariant for load_from_swift_error" ) ? static_cast<void> (0) : __assert_fail ("!I.isVolatile() && I.getMetadata(LLVMContext::MD_nontemporal) == nullptr && I.getMetadata(LLVMContext::MD_invariant_load) == nullptr && \"Support volatile, non temporal, invariant for load_from_swift_error\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 3806, __PRETTY_FUNCTION__)) | |||
3806 | "Support volatile, non temporal, invariant for load_from_swift_error")((!I.isVolatile() && I.getMetadata(LLVMContext::MD_nontemporal ) == nullptr && I.getMetadata(LLVMContext::MD_invariant_load ) == nullptr && "Support volatile, non temporal, invariant for load_from_swift_error" ) ? static_cast<void> (0) : __assert_fail ("!I.isVolatile() && I.getMetadata(LLVMContext::MD_nontemporal) == nullptr && I.getMetadata(LLVMContext::MD_invariant_load) == nullptr && \"Support volatile, non temporal, invariant for load_from_swift_error\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 3806, __PRETTY_FUNCTION__)); | |||
3807 | ||||
3808 | const Value *SV = I.getOperand(0); | |||
3809 | Type *Ty = I.getType(); | |||
3810 | AAMDNodes AAInfo; | |||
3811 | I.getAAMetadata(AAInfo); | |||
3812 | assert((((!AA || !AA->pointsToConstantMemory(MemoryLocation( SV, LocationSize ::precise(DAG.getDataLayout().getTypeStoreSize(Ty)), AAInfo)) ) && "load_from_swift_error should not be constant memory" ) ? static_cast<void> (0) : __assert_fail ("(!AA || !AA->pointsToConstantMemory(MemoryLocation( SV, LocationSize::precise(DAG.getDataLayout().getTypeStoreSize(Ty)), AAInfo))) && \"load_from_swift_error should not be constant memory\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 3817, __PRETTY_FUNCTION__)) | |||
3813 | (!AA ||(((!AA || !AA->pointsToConstantMemory(MemoryLocation( SV, LocationSize ::precise(DAG.getDataLayout().getTypeStoreSize(Ty)), AAInfo)) ) && "load_from_swift_error should not be constant memory" ) ? static_cast<void> (0) : __assert_fail ("(!AA || !AA->pointsToConstantMemory(MemoryLocation( SV, LocationSize::precise(DAG.getDataLayout().getTypeStoreSize(Ty)), AAInfo))) && \"load_from_swift_error should not be constant memory\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 3817, __PRETTY_FUNCTION__)) | |||
3814 | !AA->pointsToConstantMemory(MemoryLocation((((!AA || !AA->pointsToConstantMemory(MemoryLocation( SV, LocationSize ::precise(DAG.getDataLayout().getTypeStoreSize(Ty)), AAInfo)) ) && "load_from_swift_error should not be constant memory" ) ? static_cast<void> (0) : __assert_fail ("(!AA || !AA->pointsToConstantMemory(MemoryLocation( SV, LocationSize::precise(DAG.getDataLayout().getTypeStoreSize(Ty)), AAInfo))) && \"load_from_swift_error should not be constant memory\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 3817, __PRETTY_FUNCTION__)) | |||
3815 | SV, LocationSize::precise(DAG.getDataLayout().getTypeStoreSize(Ty)),(((!AA || !AA->pointsToConstantMemory(MemoryLocation( SV, LocationSize ::precise(DAG.getDataLayout().getTypeStoreSize(Ty)), AAInfo)) ) && "load_from_swift_error should not be constant memory" ) ? static_cast<void> (0) : __assert_fail ("(!AA || !AA->pointsToConstantMemory(MemoryLocation( SV, LocationSize::precise(DAG.getDataLayout().getTypeStoreSize(Ty)), AAInfo))) && \"load_from_swift_error should not be constant memory\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 3817, __PRETTY_FUNCTION__)) | |||
3816 | AAInfo))) &&(((!AA || !AA->pointsToConstantMemory(MemoryLocation( SV, LocationSize ::precise(DAG.getDataLayout().getTypeStoreSize(Ty)), AAInfo)) ) && "load_from_swift_error should not be constant memory" ) ? static_cast<void> (0) : __assert_fail ("(!AA || !AA->pointsToConstantMemory(MemoryLocation( SV, LocationSize::precise(DAG.getDataLayout().getTypeStoreSize(Ty)), AAInfo))) && \"load_from_swift_error should not be constant memory\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 3817, __PRETTY_FUNCTION__)) | |||
3817 | "load_from_swift_error should not be constant memory")(((!AA || !AA->pointsToConstantMemory(MemoryLocation( SV, LocationSize ::precise(DAG.getDataLayout().getTypeStoreSize(Ty)), AAInfo)) ) && "load_from_swift_error should not be constant memory" ) ? static_cast<void> (0) : __assert_fail ("(!AA || !AA->pointsToConstantMemory(MemoryLocation( SV, LocationSize::precise(DAG.getDataLayout().getTypeStoreSize(Ty)), AAInfo))) && \"load_from_swift_error should not be constant memory\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 3817, __PRETTY_FUNCTION__)); | |||
3818 | ||||
3819 | SmallVector<EVT, 4> ValueVTs; | |||
3820 | SmallVector<uint64_t, 4> Offsets; | |||
3821 | ComputeValueVTs(DAG.getTargetLoweringInfo(), DAG.getDataLayout(), Ty, | |||
3822 | ValueVTs, &Offsets); | |||
3823 | assert(ValueVTs.size() == 1 && Offsets[0] == 0 &&((ValueVTs.size() == 1 && Offsets[0] == 0 && "expect a single EVT for swifterror" ) ? static_cast<void> (0) : __assert_fail ("ValueVTs.size() == 1 && Offsets[0] == 0 && \"expect a single EVT for swifterror\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 3824, __PRETTY_FUNCTION__)) | |||
3824 | "expect a single EVT for swifterror")((ValueVTs.size() == 1 && Offsets[0] == 0 && "expect a single EVT for swifterror" ) ? static_cast<void> (0) : __assert_fail ("ValueVTs.size() == 1 && Offsets[0] == 0 && \"expect a single EVT for swifterror\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 3824, __PRETTY_FUNCTION__)); | |||
3825 | ||||
3826 | // Chain, DL, Reg, VT, Glue or Chain, DL, Reg, VT | |||
3827 | SDValue L = DAG.getCopyFromReg( | |||
3828 | getRoot(), getCurSDLoc(), | |||
3829 | FuncInfo.getOrCreateSwiftErrorVRegUseAt(&I, FuncInfo.MBB, SV).first, | |||
3830 | ValueVTs[0]); | |||
3831 | ||||
3832 | setValue(&I, L); | |||
3833 | } | |||
3834 | ||||
3835 | void SelectionDAGBuilder::visitStore(const StoreInst &I) { | |||
3836 | if (I.isAtomic()) | |||
3837 | return visitAtomicStore(I); | |||
3838 | ||||
3839 | const Value *SrcV = I.getOperand(0); | |||
3840 | const Value *PtrV = I.getOperand(1); | |||
3841 | ||||
3842 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
3843 | if (TLI.supportSwiftError()) { | |||
3844 | // Swifterror values can come from either a function parameter with | |||
3845 | // swifterror attribute or an alloca with swifterror attribute. | |||
3846 | if (const Argument *Arg = dyn_cast<Argument>(PtrV)) { | |||
3847 | if (Arg->hasSwiftErrorAttr()) | |||
3848 | return visitStoreToSwiftError(I); | |||
3849 | } | |||
3850 | ||||
3851 | if (const AllocaInst *Alloca = dyn_cast<AllocaInst>(PtrV)) { | |||
3852 | if (Alloca->isSwiftError()) | |||
3853 | return visitStoreToSwiftError(I); | |||
3854 | } | |||
3855 | } | |||
3856 | ||||
3857 | SmallVector<EVT, 4> ValueVTs; | |||
3858 | SmallVector<uint64_t, 4> Offsets; | |||
3859 | ComputeValueVTs(DAG.getTargetLoweringInfo(), DAG.getDataLayout(), | |||
3860 | SrcV->getType(), ValueVTs, &Offsets); | |||
3861 | unsigned NumValues = ValueVTs.size(); | |||
3862 | if (NumValues == 0) | |||
3863 | return; | |||
3864 | ||||
3865 | // Get the lowered operands. Note that we do this after | |||
3866 | // checking if NumResults is zero, because with zero results | |||
3867 | // the operands won't have values in the map. | |||
3868 | SDValue Src = getValue(SrcV); | |||
3869 | SDValue Ptr = getValue(PtrV); | |||
3870 | ||||
3871 | SDValue Root = getRoot(); | |||
3872 | SmallVector<SDValue, 4> Chains(std::min(MaxParallelChains, NumValues)); | |||
3873 | SDLoc dl = getCurSDLoc(); | |||
3874 | EVT PtrVT = Ptr.getValueType(); | |||
3875 | unsigned Alignment = I.getAlignment(); | |||
3876 | AAMDNodes AAInfo; | |||
3877 | I.getAAMetadata(AAInfo); | |||
3878 | ||||
3879 | auto MMOFlags = MachineMemOperand::MONone; | |||
3880 | if (I.isVolatile()) | |||
3881 | MMOFlags |= MachineMemOperand::MOVolatile; | |||
3882 | if (I.getMetadata(LLVMContext::MD_nontemporal) != nullptr) | |||
3883 | MMOFlags |= MachineMemOperand::MONonTemporal; | |||
3884 | MMOFlags |= TLI.getMMOFlags(I); | |||
3885 | ||||
3886 | // An aggregate load cannot wrap around the address space, so offsets to its | |||
3887 | // parts don't wrap either. | |||
3888 | SDNodeFlags Flags; | |||
3889 | Flags.setNoUnsignedWrap(true); | |||
3890 | ||||
3891 | unsigned ChainI = 0; | |||
3892 | for (unsigned i = 0; i != NumValues; ++i, ++ChainI) { | |||
3893 | // See visitLoad comments. | |||
3894 | if (ChainI == MaxParallelChains) { | |||
3895 | SDValue Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, | |||
3896 | makeArrayRef(Chains.data(), ChainI)); | |||
3897 | Root = Chain; | |||
3898 | ChainI = 0; | |||
3899 | } | |||
3900 | SDValue Add = DAG.getNode(ISD::ADD, dl, PtrVT, Ptr, | |||
3901 | DAG.getConstant(Offsets[i], dl, PtrVT), Flags); | |||
3902 | SDValue St = DAG.getStore( | |||
3903 | Root, dl, SDValue(Src.getNode(), Src.getResNo() + i), Add, | |||
3904 | MachinePointerInfo(PtrV, Offsets[i]), Alignment, MMOFlags, AAInfo); | |||
3905 | Chains[ChainI] = St; | |||
3906 | } | |||
3907 | ||||
3908 | SDValue StoreNode = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, | |||
3909 | makeArrayRef(Chains.data(), ChainI)); | |||
3910 | DAG.setRoot(StoreNode); | |||
3911 | } | |||
3912 | ||||
3913 | void SelectionDAGBuilder::visitMaskedStore(const CallInst &I, | |||
3914 | bool IsCompressing) { | |||
3915 | SDLoc sdl = getCurSDLoc(); | |||
3916 | ||||
3917 | auto getMaskedStoreOps = [&](Value* &Ptr, Value* &Mask, Value* &Src0, | |||
3918 | unsigned& Alignment) { | |||
3919 | // llvm.masked.store.*(Src0, Ptr, alignment, Mask) | |||
3920 | Src0 = I.getArgOperand(0); | |||
3921 | Ptr = I.getArgOperand(1); | |||
3922 | Alignment = cast<ConstantInt>(I.getArgOperand(2))->getZExtValue(); | |||
3923 | Mask = I.getArgOperand(3); | |||
3924 | }; | |||
3925 | auto getCompressingStoreOps = [&](Value* &Ptr, Value* &Mask, Value* &Src0, | |||
3926 | unsigned& Alignment) { | |||
3927 | // llvm.masked.compressstore.*(Src0, Ptr, Mask) | |||
3928 | Src0 = I.getArgOperand(0); | |||
3929 | Ptr = I.getArgOperand(1); | |||
3930 | Mask = I.getArgOperand(2); | |||
3931 | Alignment = 0; | |||
3932 | }; | |||
3933 | ||||
3934 | Value *PtrOperand, *MaskOperand, *Src0Operand; | |||
3935 | unsigned Alignment; | |||
3936 | if (IsCompressing) | |||
3937 | getCompressingStoreOps(PtrOperand, MaskOperand, Src0Operand, Alignment); | |||
3938 | else | |||
3939 | getMaskedStoreOps(PtrOperand, MaskOperand, Src0Operand, Alignment); | |||
3940 | ||||
3941 | SDValue Ptr = getValue(PtrOperand); | |||
3942 | SDValue Src0 = getValue(Src0Operand); | |||
3943 | SDValue Mask = getValue(MaskOperand); | |||
3944 | ||||
3945 | EVT VT = Src0.getValueType(); | |||
3946 | if (!Alignment) | |||
3947 | Alignment = DAG.getEVTAlignment(VT); | |||
3948 | ||||
3949 | AAMDNodes AAInfo; | |||
3950 | I.getAAMetadata(AAInfo); | |||
3951 | ||||
3952 | MachineMemOperand *MMO = | |||
3953 | DAG.getMachineFunction(). | |||
3954 | getMachineMemOperand(MachinePointerInfo(PtrOperand), | |||
3955 | MachineMemOperand::MOStore, VT.getStoreSize(), | |||
3956 | Alignment, AAInfo); | |||
3957 | SDValue StoreNode = DAG.getMaskedStore(getRoot(), sdl, Src0, Ptr, Mask, VT, | |||
3958 | MMO, false /* Truncating */, | |||
3959 | IsCompressing); | |||
3960 | DAG.setRoot(StoreNode); | |||
3961 | setValue(&I, StoreNode); | |||
3962 | } | |||
3963 | ||||
3964 | // Get a uniform base for the Gather/Scatter intrinsic. | |||
3965 | // The first argument of the Gather/Scatter intrinsic is a vector of pointers. | |||
3966 | // We try to represent it as a base pointer + vector of indices. | |||
3967 | // Usually, the vector of pointers comes from a 'getelementptr' instruction. | |||
3968 | // The first operand of the GEP may be a single pointer or a vector of pointers | |||
3969 | // Example: | |||
3970 | // %gep.ptr = getelementptr i32, <8 x i32*> %vptr, <8 x i32> %ind | |||
3971 | // or | |||
3972 | // %gep.ptr = getelementptr i32, i32* %ptr, <8 x i32> %ind | |||
3973 | // %res = call <8 x i32> @llvm.masked.gather.v8i32(<8 x i32*> %gep.ptr, .. | |||
3974 | // | |||
3975 | // When the first GEP operand is a single pointer - it is the uniform base we | |||
3976 | // are looking for. If first operand of the GEP is a splat vector - we | |||
3977 | // extract the splat value and use it as a uniform base. | |||
3978 | // In all other cases the function returns 'false'. | |||
3979 | static bool getUniformBase(const Value* &Ptr, SDValue& Base, SDValue& Index, | |||
3980 | SDValue &Scale, SelectionDAGBuilder* SDB) { | |||
3981 | SelectionDAG& DAG = SDB->DAG; | |||
3982 | LLVMContext &Context = *DAG.getContext(); | |||
3983 | ||||
3984 | assert(Ptr->getType()->isVectorTy() && "Uexpected pointer type")((Ptr->getType()->isVectorTy() && "Uexpected pointer type" ) ? static_cast<void> (0) : __assert_fail ("Ptr->getType()->isVectorTy() && \"Uexpected pointer type\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 3984, __PRETTY_FUNCTION__)); | |||
3985 | const GetElementPtrInst *GEP = dyn_cast<GetElementPtrInst>(Ptr); | |||
3986 | if (!GEP) | |||
3987 | return false; | |||
3988 | ||||
3989 | const Value *GEPPtr = GEP->getPointerOperand(); | |||
3990 | if (!GEPPtr->getType()->isVectorTy()) | |||
3991 | Ptr = GEPPtr; | |||
3992 | else if (!(Ptr = getSplatValue(GEPPtr))) | |||
3993 | return false; | |||
3994 | ||||
3995 | unsigned FinalIndex = GEP->getNumOperands() - 1; | |||
3996 | Value *IndexVal = GEP->getOperand(FinalIndex); | |||
3997 | ||||
3998 | // Ensure all the other indices are 0. | |||
3999 | for (unsigned i = 1; i < FinalIndex; ++i) { | |||
4000 | auto *C = dyn_cast<ConstantInt>(GEP->getOperand(i)); | |||
4001 | if (!C || !C->isZero()) | |||
4002 | return false; | |||
4003 | } | |||
4004 | ||||
4005 | // The operands of the GEP may be defined in another basic block. | |||
4006 | // In this case we'll not find nodes for the operands. | |||
4007 | if (!SDB->findValue(Ptr) || !SDB->findValue(IndexVal)) | |||
4008 | return false; | |||
4009 | ||||
4010 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
4011 | const DataLayout &DL = DAG.getDataLayout(); | |||
4012 | Scale = DAG.getTargetConstant(DL.getTypeAllocSize(GEP->getResultElementType()), | |||
4013 | SDB->getCurSDLoc(), TLI.getPointerTy(DL)); | |||
4014 | Base = SDB->getValue(Ptr); | |||
4015 | Index = SDB->getValue(IndexVal); | |||
4016 | ||||
4017 | if (!Index.getValueType().isVector()) { | |||
4018 | unsigned GEPWidth = GEP->getType()->getVectorNumElements(); | |||
4019 | EVT VT = EVT::getVectorVT(Context, Index.getValueType(), GEPWidth); | |||
4020 | Index = DAG.getSplatBuildVector(VT, SDLoc(Index), Index); | |||
4021 | } | |||
4022 | return true; | |||
4023 | } | |||
4024 | ||||
4025 | void SelectionDAGBuilder::visitMaskedScatter(const CallInst &I) { | |||
4026 | SDLoc sdl = getCurSDLoc(); | |||
4027 | ||||
4028 | // llvm.masked.scatter.*(Src0, Ptrs, alignemt, Mask) | |||
4029 | const Value *Ptr = I.getArgOperand(1); | |||
4030 | SDValue Src0 = getValue(I.getArgOperand(0)); | |||
4031 | SDValue Mask = getValue(I.getArgOperand(3)); | |||
4032 | EVT VT = Src0.getValueType(); | |||
4033 | unsigned Alignment = (cast<ConstantInt>(I.getArgOperand(2)))->getZExtValue(); | |||
4034 | if (!Alignment) | |||
4035 | Alignment = DAG.getEVTAlignment(VT); | |||
4036 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
4037 | ||||
4038 | AAMDNodes AAInfo; | |||
4039 | I.getAAMetadata(AAInfo); | |||
4040 | ||||
4041 | SDValue Base; | |||
4042 | SDValue Index; | |||
4043 | SDValue Scale; | |||
4044 | const Value *BasePtr = Ptr; | |||
4045 | bool UniformBase = getUniformBase(BasePtr, Base, Index, Scale, this); | |||
4046 | ||||
4047 | const Value *MemOpBasePtr = UniformBase ? BasePtr : nullptr; | |||
4048 | MachineMemOperand *MMO = DAG.getMachineFunction(). | |||
4049 | getMachineMemOperand(MachinePointerInfo(MemOpBasePtr), | |||
4050 | MachineMemOperand::MOStore, VT.getStoreSize(), | |||
4051 | Alignment, AAInfo); | |||
4052 | if (!UniformBase) { | |||
4053 | Base = DAG.getConstant(0, sdl, TLI.getPointerTy(DAG.getDataLayout())); | |||
4054 | Index = getValue(Ptr); | |||
4055 | Scale = DAG.getTargetConstant(1, sdl, TLI.getPointerTy(DAG.getDataLayout())); | |||
4056 | } | |||
4057 | SDValue Ops[] = { getRoot(), Src0, Mask, Base, Index, Scale }; | |||
4058 | SDValue Scatter = DAG.getMaskedScatter(DAG.getVTList(MVT::Other), VT, sdl, | |||
4059 | Ops, MMO); | |||
4060 | DAG.setRoot(Scatter); | |||
4061 | setValue(&I, Scatter); | |||
4062 | } | |||
4063 | ||||
4064 | void SelectionDAGBuilder::visitMaskedLoad(const CallInst &I, bool IsExpanding) { | |||
4065 | SDLoc sdl = getCurSDLoc(); | |||
4066 | ||||
4067 | auto getMaskedLoadOps = [&](Value* &Ptr, Value* &Mask, Value* &Src0, | |||
4068 | unsigned& Alignment) { | |||
4069 | // @llvm.masked.load.*(Ptr, alignment, Mask, Src0) | |||
4070 | Ptr = I.getArgOperand(0); | |||
4071 | Alignment = cast<ConstantInt>(I.getArgOperand(1))->getZExtValue(); | |||
4072 | Mask = I.getArgOperand(2); | |||
4073 | Src0 = I.getArgOperand(3); | |||
4074 | }; | |||
4075 | auto getExpandingLoadOps = [&](Value* &Ptr, Value* &Mask, Value* &Src0, | |||
4076 | unsigned& Alignment) { | |||
4077 | // @llvm.masked.expandload.*(Ptr, Mask, Src0) | |||
4078 | Ptr = I.getArgOperand(0); | |||
4079 | Alignment = 0; | |||
4080 | Mask = I.getArgOperand(1); | |||
4081 | Src0 = I.getArgOperand(2); | |||
4082 | }; | |||
4083 | ||||
4084 | Value *PtrOperand, *MaskOperand, *Src0Operand; | |||
4085 | unsigned Alignment; | |||
4086 | if (IsExpanding) | |||
4087 | getExpandingLoadOps(PtrOperand, MaskOperand, Src0Operand, Alignment); | |||
4088 | else | |||
4089 | getMaskedLoadOps(PtrOperand, MaskOperand, Src0Operand, Alignment); | |||
4090 | ||||
4091 | SDValue Ptr = getValue(PtrOperand); | |||
4092 | SDValue Src0 = getValue(Src0Operand); | |||
4093 | SDValue Mask = getValue(MaskOperand); | |||
4094 | ||||
4095 | EVT VT = Src0.getValueType(); | |||
4096 | if (!Alignment) | |||
4097 | Alignment = DAG.getEVTAlignment(VT); | |||
4098 | ||||
4099 | AAMDNodes AAInfo; | |||
4100 | I.getAAMetadata(AAInfo); | |||
4101 | const MDNode *Ranges = I.getMetadata(LLVMContext::MD_range); | |||
4102 | ||||
4103 | // Do not serialize masked loads of constant memory with anything. | |||
4104 | bool AddToChain = | |||
4105 | !AA || !AA->pointsToConstantMemory(MemoryLocation( | |||
4106 | PtrOperand, | |||
4107 | LocationSize::precise( | |||
4108 | DAG.getDataLayout().getTypeStoreSize(I.getType())), | |||
4109 | AAInfo)); | |||
4110 | SDValue InChain = AddToChain ? DAG.getRoot() : DAG.getEntryNode(); | |||
4111 | ||||
4112 | MachineMemOperand *MMO = | |||
4113 | DAG.getMachineFunction(). | |||
4114 | getMachineMemOperand(MachinePointerInfo(PtrOperand), | |||
4115 | MachineMemOperand::MOLoad, VT.getStoreSize(), | |||
4116 | Alignment, AAInfo, Ranges); | |||
4117 | ||||
4118 | SDValue Load = DAG.getMaskedLoad(VT, sdl, InChain, Ptr, Mask, Src0, VT, MMO, | |||
4119 | ISD::NON_EXTLOAD, IsExpanding); | |||
4120 | if (AddToChain) | |||
4121 | PendingLoads.push_back(Load.getValue(1)); | |||
4122 | setValue(&I, Load); | |||
4123 | } | |||
4124 | ||||
4125 | void SelectionDAGBuilder::visitMaskedGather(const CallInst &I) { | |||
4126 | SDLoc sdl = getCurSDLoc(); | |||
4127 | ||||
4128 | // @llvm.masked.gather.*(Ptrs, alignment, Mask, Src0) | |||
4129 | const Value *Ptr = I.getArgOperand(0); | |||
4130 | SDValue Src0 = getValue(I.getArgOperand(3)); | |||
4131 | SDValue Mask = getValue(I.getArgOperand(2)); | |||
4132 | ||||
4133 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
4134 | EVT VT = TLI.getValueType(DAG.getDataLayout(), I.getType()); | |||
4135 | unsigned Alignment = (cast<ConstantInt>(I.getArgOperand(1)))->getZExtValue(); | |||
4136 | if (!Alignment) | |||
4137 | Alignment = DAG.getEVTAlignment(VT); | |||
4138 | ||||
4139 | AAMDNodes AAInfo; | |||
4140 | I.getAAMetadata(AAInfo); | |||
4141 | const MDNode *Ranges = I.getMetadata(LLVMContext::MD_range); | |||
4142 | ||||
4143 | SDValue Root = DAG.getRoot(); | |||
4144 | SDValue Base; | |||
4145 | SDValue Index; | |||
4146 | SDValue Scale; | |||
4147 | const Value *BasePtr = Ptr; | |||
4148 | bool UniformBase = getUniformBase(BasePtr, Base, Index, Scale, this); | |||
4149 | bool ConstantMemory = false; | |||
4150 | if (UniformBase && AA && | |||
4151 | AA->pointsToConstantMemory( | |||
4152 | MemoryLocation(BasePtr, | |||
4153 | LocationSize::precise( | |||
4154 | DAG.getDataLayout().getTypeStoreSize(I.getType())), | |||
4155 | AAInfo))) { | |||
4156 | // Do not serialize (non-volatile) loads of constant memory with anything. | |||
4157 | Root = DAG.getEntryNode(); | |||
4158 | ConstantMemory = true; | |||
4159 | } | |||
4160 | ||||
4161 | MachineMemOperand *MMO = | |||
4162 | DAG.getMachineFunction(). | |||
4163 | getMachineMemOperand(MachinePointerInfo(UniformBase ? BasePtr : nullptr), | |||
4164 | MachineMemOperand::MOLoad, VT.getStoreSize(), | |||
4165 | Alignment, AAInfo, Ranges); | |||
4166 | ||||
4167 | if (!UniformBase) { | |||
4168 | Base = DAG.getConstant(0, sdl, TLI.getPointerTy(DAG.getDataLayout())); | |||
4169 | Index = getValue(Ptr); | |||
4170 | Scale = DAG.getTargetConstant(1, sdl, TLI.getPointerTy(DAG.getDataLayout())); | |||
4171 | } | |||
4172 | SDValue Ops[] = { Root, Src0, Mask, Base, Index, Scale }; | |||
4173 | SDValue Gather = DAG.getMaskedGather(DAG.getVTList(VT, MVT::Other), VT, sdl, | |||
4174 | Ops, MMO); | |||
4175 | ||||
4176 | SDValue OutChain = Gather.getValue(1); | |||
4177 | if (!ConstantMemory) | |||
4178 | PendingLoads.push_back(OutChain); | |||
4179 | setValue(&I, Gather); | |||
4180 | } | |||
4181 | ||||
4182 | void SelectionDAGBuilder::visitAtomicCmpXchg(const AtomicCmpXchgInst &I) { | |||
4183 | SDLoc dl = getCurSDLoc(); | |||
4184 | AtomicOrdering SuccessOrder = I.getSuccessOrdering(); | |||
4185 | AtomicOrdering FailureOrder = I.getFailureOrdering(); | |||
4186 | SyncScope::ID SSID = I.getSyncScopeID(); | |||
4187 | ||||
4188 | SDValue InChain = getRoot(); | |||
4189 | ||||
4190 | MVT MemVT = getValue(I.getCompareOperand()).getSimpleValueType(); | |||
4191 | SDVTList VTs = DAG.getVTList(MemVT, MVT::i1, MVT::Other); | |||
4192 | SDValue L = DAG.getAtomicCmpSwap( | |||
4193 | ISD::ATOMIC_CMP_SWAP_WITH_SUCCESS, dl, MemVT, VTs, InChain, | |||
4194 | getValue(I.getPointerOperand()), getValue(I.getCompareOperand()), | |||
4195 | getValue(I.getNewValOperand()), MachinePointerInfo(I.getPointerOperand()), | |||
4196 | /*Alignment=*/ 0, SuccessOrder, FailureOrder, SSID); | |||
4197 | ||||
4198 | SDValue OutChain = L.getValue(2); | |||
4199 | ||||
4200 | setValue(&I, L); | |||
4201 | DAG.setRoot(OutChain); | |||
4202 | } | |||
4203 | ||||
4204 | void SelectionDAGBuilder::visitAtomicRMW(const AtomicRMWInst &I) { | |||
4205 | SDLoc dl = getCurSDLoc(); | |||
4206 | ISD::NodeType NT; | |||
4207 | switch (I.getOperation()) { | |||
4208 | default: llvm_unreachable("Unknown atomicrmw operation")::llvm::llvm_unreachable_internal("Unknown atomicrmw operation" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 4208); | |||
4209 | case AtomicRMWInst::Xchg: NT = ISD::ATOMIC_SWAP; break; | |||
4210 | case AtomicRMWInst::Add: NT = ISD::ATOMIC_LOAD_ADD; break; | |||
4211 | case AtomicRMWInst::Sub: NT = ISD::ATOMIC_LOAD_SUB; break; | |||
4212 | case AtomicRMWInst::And: NT = ISD::ATOMIC_LOAD_AND; break; | |||
4213 | case AtomicRMWInst::Nand: NT = ISD::ATOMIC_LOAD_NAND; break; | |||
4214 | case AtomicRMWInst::Or: NT = ISD::ATOMIC_LOAD_OR; break; | |||
4215 | case AtomicRMWInst::Xor: NT = ISD::ATOMIC_LOAD_XOR; break; | |||
4216 | case AtomicRMWInst::Max: NT = ISD::ATOMIC_LOAD_MAX; break; | |||
4217 | case AtomicRMWInst::Min: NT = ISD::ATOMIC_LOAD_MIN; break; | |||
4218 | case AtomicRMWInst::UMax: NT = ISD::ATOMIC_LOAD_UMAX; break; | |||
4219 | case AtomicRMWInst::UMin: NT = ISD::ATOMIC_LOAD_UMIN; break; | |||
4220 | } | |||
4221 | AtomicOrdering Order = I.getOrdering(); | |||
4222 | SyncScope::ID SSID = I.getSyncScopeID(); | |||
4223 | ||||
4224 | SDValue InChain = getRoot(); | |||
4225 | ||||
4226 | SDValue L = | |||
4227 | DAG.getAtomic(NT, dl, | |||
4228 | getValue(I.getValOperand()).getSimpleValueType(), | |||
4229 | InChain, | |||
4230 | getValue(I.getPointerOperand()), | |||
4231 | getValue(I.getValOperand()), | |||
4232 | I.getPointerOperand(), | |||
4233 | /* Alignment=*/ 0, Order, SSID); | |||
4234 | ||||
4235 | SDValue OutChain = L.getValue(1); | |||
4236 | ||||
4237 | setValue(&I, L); | |||
4238 | DAG.setRoot(OutChain); | |||
4239 | } | |||
4240 | ||||
4241 | void SelectionDAGBuilder::visitFence(const FenceInst &I) { | |||
4242 | SDLoc dl = getCurSDLoc(); | |||
4243 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
4244 | SDValue Ops[3]; | |||
4245 | Ops[0] = getRoot(); | |||
4246 | Ops[1] = DAG.getConstant((unsigned)I.getOrdering(), dl, | |||
4247 | TLI.getFenceOperandTy(DAG.getDataLayout())); | |||
4248 | Ops[2] = DAG.getConstant(I.getSyncScopeID(), dl, | |||
4249 | TLI.getFenceOperandTy(DAG.getDataLayout())); | |||
4250 | DAG.setRoot(DAG.getNode(ISD::ATOMIC_FENCE, dl, MVT::Other, Ops)); | |||
4251 | } | |||
4252 | ||||
4253 | void SelectionDAGBuilder::visitAtomicLoad(const LoadInst &I) { | |||
4254 | SDLoc dl = getCurSDLoc(); | |||
4255 | AtomicOrdering Order = I.getOrdering(); | |||
4256 | SyncScope::ID SSID = I.getSyncScopeID(); | |||
4257 | ||||
4258 | SDValue InChain = getRoot(); | |||
4259 | ||||
4260 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
4261 | EVT VT = TLI.getValueType(DAG.getDataLayout(), I.getType()); | |||
4262 | ||||
4263 | if (!TLI.supportsUnalignedAtomics() && | |||
4264 | I.getAlignment() < VT.getStoreSize()) | |||
4265 | report_fatal_error("Cannot generate unaligned atomic load"); | |||
4266 | ||||
4267 | MachineMemOperand *MMO = | |||
4268 | DAG.getMachineFunction(). | |||
4269 | getMachineMemOperand(MachinePointerInfo(I.getPointerOperand()), | |||
4270 | MachineMemOperand::MOVolatile | | |||
4271 | MachineMemOperand::MOLoad, | |||
4272 | VT.getStoreSize(), | |||
4273 | I.getAlignment() ? I.getAlignment() : | |||
4274 | DAG.getEVTAlignment(VT), | |||
4275 | AAMDNodes(), nullptr, SSID, Order); | |||
4276 | ||||
4277 | InChain = TLI.prepareVolatileOrAtomicLoad(InChain, dl, DAG); | |||
4278 | SDValue L = | |||
4279 | DAG.getAtomic(ISD::ATOMIC_LOAD, dl, VT, VT, InChain, | |||
4280 | getValue(I.getPointerOperand()), MMO); | |||
4281 | ||||
4282 | SDValue OutChain = L.getValue(1); | |||
4283 | ||||
4284 | setValue(&I, L); | |||
4285 | DAG.setRoot(OutChain); | |||
4286 | } | |||
4287 | ||||
4288 | void SelectionDAGBuilder::visitAtomicStore(const StoreInst &I) { | |||
4289 | SDLoc dl = getCurSDLoc(); | |||
4290 | ||||
4291 | AtomicOrdering Order = I.getOrdering(); | |||
4292 | SyncScope::ID SSID = I.getSyncScopeID(); | |||
4293 | ||||
4294 | SDValue InChain = getRoot(); | |||
4295 | ||||
4296 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
4297 | EVT VT = | |||
4298 | TLI.getValueType(DAG.getDataLayout(), I.getValueOperand()->getType()); | |||
4299 | ||||
4300 | if (I.getAlignment() < VT.getStoreSize()) | |||
4301 | report_fatal_error("Cannot generate unaligned atomic store"); | |||
4302 | ||||
4303 | SDValue OutChain = | |||
4304 | DAG.getAtomic(ISD::ATOMIC_STORE, dl, VT, | |||
4305 | InChain, | |||
4306 | getValue(I.getPointerOperand()), | |||
4307 | getValue(I.getValueOperand()), | |||
4308 | I.getPointerOperand(), I.getAlignment(), | |||
4309 | Order, SSID); | |||
4310 | ||||
4311 | DAG.setRoot(OutChain); | |||
4312 | } | |||
4313 | ||||
4314 | /// visitTargetIntrinsic - Lower a call of a target intrinsic to an INTRINSIC | |||
4315 | /// node. | |||
4316 | void SelectionDAGBuilder::visitTargetIntrinsic(const CallInst &I, | |||
4317 | unsigned Intrinsic) { | |||
4318 | // Ignore the callsite's attributes. A specific call site may be marked with | |||
4319 | // readnone, but the lowering code will expect the chain based on the | |||
4320 | // definition. | |||
4321 | const Function *F = I.getCalledFunction(); | |||
4322 | bool HasChain = !F->doesNotAccessMemory(); | |||
4323 | bool OnlyLoad = HasChain && F->onlyReadsMemory(); | |||
4324 | ||||
4325 | // Build the operand list. | |||
4326 | SmallVector<SDValue, 8> Ops; | |||
4327 | if (HasChain) { // If this intrinsic has side-effects, chainify it. | |||
4328 | if (OnlyLoad) { | |||
4329 | // We don't need to serialize loads against other loads. | |||
4330 | Ops.push_back(DAG.getRoot()); | |||
4331 | } else { | |||
4332 | Ops.push_back(getRoot()); | |||
4333 | } | |||
4334 | } | |||
4335 | ||||
4336 | // Info is set by getTgtMemInstrinsic | |||
4337 | TargetLowering::IntrinsicInfo Info; | |||
4338 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
4339 | bool IsTgtIntrinsic = TLI.getTgtMemIntrinsic(Info, I, | |||
4340 | DAG.getMachineFunction(), | |||
4341 | Intrinsic); | |||
4342 | ||||
4343 | // Add the intrinsic ID as an integer operand if it's not a target intrinsic. | |||
4344 | if (!IsTgtIntrinsic || Info.opc == ISD::INTRINSIC_VOID || | |||
4345 | Info.opc == ISD::INTRINSIC_W_CHAIN) | |||
4346 | Ops.push_back(DAG.getTargetConstant(Intrinsic, getCurSDLoc(), | |||
4347 | TLI.getPointerTy(DAG.getDataLayout()))); | |||
4348 | ||||
4349 | // Add all operands of the call to the operand list. | |||
4350 | for (unsigned i = 0, e = I.getNumArgOperands(); i != e; ++i) { | |||
4351 | SDValue Op = getValue(I.getArgOperand(i)); | |||
4352 | Ops.push_back(Op); | |||
4353 | } | |||
4354 | ||||
4355 | SmallVector<EVT, 4> ValueVTs; | |||
4356 | ComputeValueVTs(TLI, DAG.getDataLayout(), I.getType(), ValueVTs); | |||
4357 | ||||
4358 | if (HasChain) | |||
4359 | ValueVTs.push_back(MVT::Other); | |||
4360 | ||||
4361 | SDVTList VTs = DAG.getVTList(ValueVTs); | |||
4362 | ||||
4363 | // Create the node. | |||
4364 | SDValue Result; | |||
4365 | if (IsTgtIntrinsic) { | |||
4366 | // This is target intrinsic that touches memory | |||
4367 | Result = DAG.getMemIntrinsicNode(Info.opc, getCurSDLoc(), VTs, | |||
4368 | Ops, Info.memVT, | |||
4369 | MachinePointerInfo(Info.ptrVal, Info.offset), Info.align, | |||
4370 | Info.flags, Info.size); | |||
4371 | } else if (!HasChain) { | |||
4372 | Result = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, getCurSDLoc(), VTs, Ops); | |||
4373 | } else if (!I.getType()->isVoidTy()) { | |||
4374 | Result = DAG.getNode(ISD::INTRINSIC_W_CHAIN, getCurSDLoc(), VTs, Ops); | |||
4375 | } else { | |||
4376 | Result = DAG.getNode(ISD::INTRINSIC_VOID, getCurSDLoc(), VTs, Ops); | |||
4377 | } | |||
4378 | ||||
4379 | if (HasChain) { | |||
4380 | SDValue Chain = Result.getValue(Result.getNode()->getNumValues()-1); | |||
4381 | if (OnlyLoad) | |||
4382 | PendingLoads.push_back(Chain); | |||
4383 | else | |||
4384 | DAG.setRoot(Chain); | |||
4385 | } | |||
4386 | ||||
4387 | if (!I.getType()->isVoidTy()) { | |||
4388 | if (VectorType *PTy = dyn_cast<VectorType>(I.getType())) { | |||
4389 | EVT VT = TLI.getValueType(DAG.getDataLayout(), PTy); | |||
4390 | Result = DAG.getNode(ISD::BITCAST, getCurSDLoc(), VT, Result); | |||
4391 | } else | |||
4392 | Result = lowerRangeToAssertZExt(DAG, I, Result); | |||
4393 | ||||
4394 | setValue(&I, Result); | |||
4395 | } | |||
4396 | } | |||
4397 | ||||
4398 | /// GetSignificand - Get the significand and build it into a floating-point | |||
4399 | /// number with exponent of 1: | |||
4400 | /// | |||
4401 | /// Op = (Op & 0x007fffff) | 0x3f800000; | |||
4402 | /// | |||
4403 | /// where Op is the hexadecimal representation of floating point value. | |||
4404 | static SDValue GetSignificand(SelectionDAG &DAG, SDValue Op, const SDLoc &dl) { | |||
4405 | SDValue t1 = DAG.getNode(ISD::AND, dl, MVT::i32, Op, | |||
4406 | DAG.getConstant(0x007fffff, dl, MVT::i32)); | |||
4407 | SDValue t2 = DAG.getNode(ISD::OR, dl, MVT::i32, t1, | |||
4408 | DAG.getConstant(0x3f800000, dl, MVT::i32)); | |||
4409 | return DAG.getNode(ISD::BITCAST, dl, MVT::f32, t2); | |||
4410 | } | |||
4411 | ||||
4412 | /// GetExponent - Get the exponent: | |||
4413 | /// | |||
4414 | /// (float)(int)(((Op & 0x7f800000) >> 23) - 127); | |||
4415 | /// | |||
4416 | /// where Op is the hexadecimal representation of floating point value. | |||
4417 | static SDValue GetExponent(SelectionDAG &DAG, SDValue Op, | |||
4418 | const TargetLowering &TLI, const SDLoc &dl) { | |||
4419 | SDValue t0 = DAG.getNode(ISD::AND, dl, MVT::i32, Op, | |||
4420 | DAG.getConstant(0x7f800000, dl, MVT::i32)); | |||
4421 | SDValue t1 = DAG.getNode( | |||
4422 | ISD::SRL, dl, MVT::i32, t0, | |||
4423 | DAG.getConstant(23, dl, TLI.getPointerTy(DAG.getDataLayout()))); | |||
4424 | SDValue t2 = DAG.getNode(ISD::SUB, dl, MVT::i32, t1, | |||
4425 | DAG.getConstant(127, dl, MVT::i32)); | |||
4426 | return DAG.getNode(ISD::SINT_TO_FP, dl, MVT::f32, t2); | |||
4427 | } | |||
4428 | ||||
4429 | /// getF32Constant - Get 32-bit floating point constant. | |||
4430 | static SDValue getF32Constant(SelectionDAG &DAG, unsigned Flt, | |||
4431 | const SDLoc &dl) { | |||
4432 | return DAG.getConstantFP(APFloat(APFloat::IEEEsingle(), APInt(32, Flt)), dl, | |||
4433 | MVT::f32); | |||
4434 | } | |||
4435 | ||||
4436 | static SDValue getLimitedPrecisionExp2(SDValue t0, const SDLoc &dl, | |||
4437 | SelectionDAG &DAG) { | |||
4438 | // TODO: What fast-math-flags should be set on the floating-point nodes? | |||
4439 | ||||
4440 | // IntegerPartOfX = ((int32_t)(t0); | |||
4441 | SDValue IntegerPartOfX = DAG.getNode(ISD::FP_TO_SINT, dl, MVT::i32, t0); | |||
4442 | ||||
4443 | // FractionalPartOfX = t0 - (float)IntegerPartOfX; | |||
4444 | SDValue t1 = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::f32, IntegerPartOfX); | |||
4445 | SDValue X = DAG.getNode(ISD::FSUB, dl, MVT::f32, t0, t1); | |||
4446 | ||||
4447 | // IntegerPartOfX <<= 23; | |||
4448 | IntegerPartOfX = DAG.getNode( | |||
4449 | ISD::SHL, dl, MVT::i32, IntegerPartOfX, | |||
4450 | DAG.getConstant(23, dl, DAG.getTargetLoweringInfo().getPointerTy( | |||
4451 | DAG.getDataLayout()))); | |||
4452 | ||||
4453 | SDValue TwoToFractionalPartOfX; | |||
4454 | if (LimitFloatPrecision <= 6) { | |||
4455 | // For floating-point precision of 6: | |||
4456 | // | |||
4457 | // TwoToFractionalPartOfX = | |||
4458 | // 0.997535578f + | |||
4459 | // (0.735607626f + 0.252464424f * x) * x; | |||
4460 | // | |||
4461 | // error 0.0144103317, which is 6 bits | |||
4462 | SDValue t2 = DAG.getNode(ISD::FMUL, dl, MVT::f32, X, | |||
4463 | getF32Constant(DAG, 0x3e814304, dl)); | |||
4464 | SDValue t3 = DAG.getNode(ISD::FADD, dl, MVT::f32, t2, | |||
4465 | getF32Constant(DAG, 0x3f3c50c8, dl)); | |||
4466 | SDValue t4 = DAG.getNode(ISD::FMUL, dl, MVT::f32, t3, X); | |||
4467 | TwoToFractionalPartOfX = DAG.getNode(ISD::FADD, dl, MVT::f32, t4, | |||
4468 | getF32Constant(DAG, 0x3f7f5e7e, dl)); | |||
4469 | } else if (LimitFloatPrecision <= 12) { | |||
4470 | // For floating-point precision of 12: | |||
4471 | // | |||
4472 | // TwoToFractionalPartOfX = | |||
4473 | // 0.999892986f + | |||
4474 | // (0.696457318f + | |||
4475 | // (0.224338339f + 0.792043434e-1f * x) * x) * x; | |||
4476 | // | |||
4477 | // error 0.000107046256, which is 13 to 14 bits | |||
4478 | SDValue t2 = DAG.getNode(ISD::FMUL, dl, MVT::f32, X, | |||
4479 | getF32Constant(DAG, 0x3da235e3, dl)); | |||
4480 | SDValue t3 = DAG.getNode(ISD::FADD, dl, MVT::f32, t2, | |||
4481 | getF32Constant(DAG, 0x3e65b8f3, dl)); | |||
4482 | SDValue t4 = DAG.getNode(ISD::FMUL, dl, MVT::f32, t3, X); | |||
4483 | SDValue t5 = DAG.getNode(ISD::FADD, dl, MVT::f32, t4, | |||
4484 | getF32Constant(DAG, 0x3f324b07, dl)); | |||
4485 | SDValue t6 = DAG.getNode(ISD::FMUL, dl, MVT::f32, t5, X); | |||
4486 | TwoToFractionalPartOfX = DAG.getNode(ISD::FADD, dl, MVT::f32, t6, | |||
4487 | getF32Constant(DAG, 0x3f7ff8fd, dl)); | |||
4488 | } else { // LimitFloatPrecision <= 18 | |||
4489 | // For floating-point precision of 18: | |||
4490 | // | |||
4491 | // TwoToFractionalPartOfX = | |||
4492 | // 0.999999982f + | |||
4493 | // (0.693148872f + | |||
4494 | // (0.240227044f + | |||
4495 | // (0.554906021e-1f + | |||
4496 | // (0.961591928e-2f + | |||
4497 | // (0.136028312e-2f + 0.157059148e-3f *x)*x)*x)*x)*x)*x; | |||
4498 | // error 2.47208000*10^(-7), which is better than 18 bits | |||
4499 | SDValue t2 = DAG.getNode(ISD::FMUL, dl, MVT::f32, X, | |||
4500 | getF32Constant(DAG, 0x3924b03e, dl)); | |||
4501 | SDValue t3 = DAG.getNode(ISD::FADD, dl, MVT::f32, t2, | |||
4502 | getF32Constant(DAG, 0x3ab24b87, dl)); | |||
4503 | SDValue t4 = DAG.getNode(ISD::FMUL, dl, MVT::f32, t3, X); | |||
4504 | SDValue t5 = DAG.getNode(ISD::FADD, dl, MVT::f32, t4, | |||
4505 | getF32Constant(DAG, 0x3c1d8c17, dl)); | |||
4506 | SDValue t6 = DAG.getNode(ISD::FMUL, dl, MVT::f32, t5, X); | |||
4507 | SDValue t7 = DAG.getNode(ISD::FADD, dl, MVT::f32, t6, | |||
4508 | getF32Constant(DAG, 0x3d634a1d, dl)); | |||
4509 | SDValue t8 = DAG.getNode(ISD::FMUL, dl, MVT::f32, t7, X); | |||
4510 | SDValue t9 = DAG.getNode(ISD::FADD, dl, MVT::f32, t8, | |||
4511 | getF32Constant(DAG, 0x3e75fe14, dl)); | |||
4512 | SDValue t10 = DAG.getNode(ISD::FMUL, dl, MVT::f32, t9, X); | |||
4513 | SDValue t11 = DAG.getNode(ISD::FADD, dl, MVT::f32, t10, | |||
4514 | getF32Constant(DAG, 0x3f317234, dl)); | |||
4515 | SDValue t12 = DAG.getNode(ISD::FMUL, dl, MVT::f32, t11, X); | |||
4516 | TwoToFractionalPartOfX = DAG.getNode(ISD::FADD, dl, MVT::f32, t12, | |||
4517 | getF32Constant(DAG, 0x3f800000, dl)); | |||
4518 | } | |||
4519 | ||||
4520 | // Add the exponent into the result in integer domain. | |||
4521 | SDValue t13 = DAG.getNode(ISD::BITCAST, dl, MVT::i32, TwoToFractionalPartOfX); | |||
4522 | return DAG.getNode(ISD::BITCAST, dl, MVT::f32, | |||
4523 | DAG.getNode(ISD::ADD, dl, MVT::i32, t13, IntegerPartOfX)); | |||
4524 | } | |||
4525 | ||||
4526 | /// expandExp - Lower an exp intrinsic. Handles the special sequences for | |||
4527 | /// limited-precision mode. | |||
4528 | static SDValue expandExp(const SDLoc &dl, SDValue Op, SelectionDAG &DAG, | |||
4529 | const TargetLowering &TLI) { | |||
4530 | if (Op.getValueType() == MVT::f32 && | |||
4531 | LimitFloatPrecision > 0 && LimitFloatPrecision <= 18) { | |||
4532 | ||||
4533 | // Put the exponent in the right bit position for later addition to the | |||
4534 | // final result: | |||
4535 | // | |||
4536 | // #define LOG2OFe 1.4426950f | |||
4537 | // t0 = Op * LOG2OFe | |||
4538 | ||||
4539 | // TODO: What fast-math-flags should be set here? | |||
4540 | SDValue t0 = DAG.getNode(ISD::FMUL, dl, MVT::f32, Op, | |||
4541 | getF32Constant(DAG, 0x3fb8aa3b, dl)); | |||
4542 | return getLimitedPrecisionExp2(t0, dl, DAG); | |||
4543 | } | |||
4544 | ||||
4545 | // No special expansion. | |||
4546 | return DAG.getNode(ISD::FEXP, dl, Op.getValueType(), Op); | |||
4547 | } | |||
4548 | ||||
4549 | /// expandLog - Lower a log intrinsic. Handles the special sequences for | |||
4550 | /// limited-precision mode. | |||
4551 | static SDValue expandLog(const SDLoc &dl, SDValue Op, SelectionDAG &DAG, | |||
4552 | const TargetLowering &TLI) { | |||
4553 | // TODO: What fast-math-flags should be set on the floating-point nodes? | |||
4554 | ||||
4555 | if (Op.getValueType() == MVT::f32 && | |||
4556 | LimitFloatPrecision > 0 && LimitFloatPrecision <= 18) { | |||
4557 | SDValue Op1 = DAG.getNode(ISD::BITCAST, dl, MVT::i32, Op); | |||
4558 | ||||
4559 | // Scale the exponent by log(2) [0.69314718f]. | |||
4560 | SDValue Exp = GetExponent(DAG, Op1, TLI, dl); | |||
4561 | SDValue LogOfExponent = DAG.getNode(ISD::FMUL, dl, MVT::f32, Exp, | |||
4562 | getF32Constant(DAG, 0x3f317218, dl)); | |||
4563 | ||||
4564 | // Get the significand and build it into a floating-point number with | |||
4565 | // exponent of 1. | |||
4566 | SDValue X = GetSignificand(DAG, Op1, dl); | |||
4567 | ||||
4568 | SDValue LogOfMantissa; | |||
4569 | if (LimitFloatPrecision <= 6) { | |||
4570 | // For floating-point precision of 6: | |||
4571 | // | |||
4572 | // LogofMantissa = | |||
4573 | // -1.1609546f + | |||
4574 | // (1.4034025f - 0.23903021f * x) * x; | |||
4575 | // | |||
4576 | // error 0.0034276066, which is better than 8 bits | |||
4577 | SDValue t0 = DAG.getNode(ISD::FMUL, dl, MVT::f32, X, | |||
4578 | getF32Constant(DAG, 0xbe74c456, dl)); | |||
4579 | SDValue t1 = DAG.getNode(ISD::FADD, dl, MVT::f32, t0, | |||
4580 | getF32Constant(DAG, 0x3fb3a2b1, dl)); | |||
4581 | SDValue t2 = DAG.getNode(ISD::FMUL, dl, MVT::f32, t1, X); | |||
4582 | LogOfMantissa = DAG.getNode(ISD::FSUB, dl, MVT::f32, t2, | |||
4583 | getF32Constant(DAG, 0x3f949a29, dl)); | |||
4584 | } else if (LimitFloatPrecision <= 12) { | |||
4585 | // For floating-point precision of 12: | |||
4586 | // | |||
4587 | // LogOfMantissa = | |||
4588 | // -1.7417939f + | |||
4589 | // (2.8212026f + | |||
4590 | // (-1.4699568f + | |||
4591 | // (0.44717955f - 0.56570851e-1f * x) * x) * x) * x; | |||
4592 | // | |||
4593 | // error 0.000061011436, which is 14 bits | |||
4594 | SDValue t0 = DAG.getNode(ISD::FMUL, dl, MVT::f32, X, | |||
4595 | getF32Constant(DAG, 0xbd67b6d6, dl)); | |||
4596 | SDValue t1 = DAG.getNode(ISD::FADD, dl, MVT::f32, t0, | |||
4597 | getF32Constant(DAG, 0x3ee4f4b8, dl)); | |||
4598 | SDValue t2 = DAG.getNode(ISD::FMUL, dl, MVT::f32, t1, X); | |||
4599 | SDValue t3 = DAG.getNode(ISD::FSUB, dl, MVT::f32, t2, | |||
4600 | getF32Constant(DAG, 0x3fbc278b, dl)); | |||
4601 | SDValue t4 = DAG.getNode(ISD::FMUL, dl, MVT::f32, t3, X); | |||
4602 | SDValue t5 = DAG.getNode(ISD::FADD, dl, MVT::f32, t4, | |||
4603 | getF32Constant(DAG, 0x40348e95, dl)); | |||
4604 | SDValue t6 = DAG.getNode(ISD::FMUL, dl, MVT::f32, t5, X); | |||
4605 | LogOfMantissa = DAG.getNode(ISD::FSUB, dl, MVT::f32, t6, | |||
4606 | getF32Constant(DAG, 0x3fdef31a, dl)); | |||
4607 | } else { // LimitFloatPrecision <= 18 | |||
4608 | // For floating-point precision of 18: | |||
4609 | // | |||
4610 | // LogOfMantissa = | |||
4611 | // -2.1072184f + | |||
4612 | // (4.2372794f + | |||
4613 | // (-3.7029485f + | |||
4614 | // (2.2781945f + | |||
4615 | // (-0.87823314f + | |||
4616 | // (0.19073739f - 0.17809712e-1f * x) * x) * x) * x) * x)*x; | |||
4617 | // | |||
4618 | // error 0.0000023660568, which is better than 18 bits | |||
4619 | SDValue t0 = DAG.getNode(ISD::FMUL, dl, MVT::f32, X, | |||
4620 | getF32Constant(DAG, 0xbc91e5ac, dl)); | |||
4621 | SDValue t1 = DAG.getNode(ISD::FADD, dl, MVT::f32, t0, | |||
4622 | getF32Constant(DAG, 0x3e4350aa, dl)); | |||
4623 | SDValue t2 = DAG.getNode(ISD::FMUL, dl, MVT::f32, t1, X); | |||
4624 | SDValue t3 = DAG.getNode(ISD::FSUB, dl, MVT::f32, t2, | |||
4625 | getF32Constant(DAG, 0x3f60d3e3, dl)); | |||
4626 | SDValue t4 = DAG.getNode(ISD::FMUL, dl, MVT::f32, t3, X); | |||
4627 | SDValue t5 = DAG.getNode(ISD::FADD, dl, MVT::f32, t4, | |||
4628 | getF32Constant(DAG, 0x4011cdf0, dl)); | |||
4629 | SDValue t6 = DAG.getNode(ISD::FMUL, dl, MVT::f32, t5, X); | |||
4630 | SDValue t7 = DAG.getNode(ISD::FSUB, dl, MVT::f32, t6, | |||
4631 | getF32Constant(DAG, 0x406cfd1c, dl)); | |||
4632 | SDValue t8 = DAG.getNode(ISD::FMUL, dl, MVT::f32, t7, X); | |||
4633 | SDValue t9 = DAG.getNode(ISD::FADD, dl, MVT::f32, t8, | |||
4634 | getF32Constant(DAG, 0x408797cb, dl)); | |||
4635 | SDValue t10 = DAG.getNode(ISD::FMUL, dl, MVT::f32, t9, X); | |||
4636 | LogOfMantissa = DAG.getNode(ISD::FSUB, dl, MVT::f32, t10, | |||
4637 | getF32Constant(DAG, 0x4006dcab, dl)); | |||
4638 | } | |||
4639 | ||||
4640 | return DAG.getNode(ISD::FADD, dl, MVT::f32, LogOfExponent, LogOfMantissa); | |||
4641 | } | |||
4642 | ||||
4643 | // No special expansion. | |||
4644 | return DAG.getNode(ISD::FLOG, dl, Op.getValueType(), Op); | |||
4645 | } | |||
4646 | ||||
4647 | /// expandLog2 - Lower a log2 intrinsic. Handles the special sequences for | |||
4648 | /// limited-precision mode. | |||
4649 | static SDValue expandLog2(const SDLoc &dl, SDValue Op, SelectionDAG &DAG, | |||
4650 | const TargetLowering &TLI) { | |||
4651 | // TODO: What fast-math-flags should be set on the floating-point nodes? | |||
4652 | ||||
4653 | if (Op.getValueType() == MVT::f32 && | |||
4654 | LimitFloatPrecision > 0 && LimitFloatPrecision <= 18) { | |||
4655 | SDValue Op1 = DAG.getNode(ISD::BITCAST, dl, MVT::i32, Op); | |||
4656 | ||||
4657 | // Get the exponent. | |||
4658 | SDValue LogOfExponent = GetExponent(DAG, Op1, TLI, dl); | |||
4659 | ||||
4660 | // Get the significand and build it into a floating-point number with | |||
4661 | // exponent of 1. | |||
4662 | SDValue X = GetSignificand(DAG, Op1, dl); | |||
4663 | ||||
4664 | // Different possible minimax approximations of significand in | |||
4665 | // floating-point for various degrees of accuracy over [1,2]. | |||
4666 | SDValue Log2ofMantissa; | |||
4667 | if (LimitFloatPrecision <= 6) { | |||
4668 | // For floating-point precision of 6: | |||
4669 | // | |||
4670 | // Log2ofMantissa = -1.6749035f + (2.0246817f - .34484768f * x) * x; | |||
4671 | // | |||
4672 | // error 0.0049451742, which is more than 7 bits | |||
4673 | SDValue t0 = DAG.getNode(ISD::FMUL, dl, MVT::f32, X, | |||
4674 | getF32Constant(DAG, 0xbeb08fe0, dl)); | |||
4675 | SDValue t1 = DAG.getNode(ISD::FADD, dl, MVT::f32, t0, | |||
4676 | getF32Constant(DAG, 0x40019463, dl)); | |||
4677 | SDValue t2 = DAG.getNode(ISD::FMUL, dl, MVT::f32, t1, X); | |||
4678 | Log2ofMantissa = DAG.getNode(ISD::FSUB, dl, MVT::f32, t2, | |||
4679 | getF32Constant(DAG, 0x3fd6633d, dl)); | |||
4680 | } else if (LimitFloatPrecision <= 12) { | |||
4681 | // For floating-point precision of 12: | |||
4682 | // | |||
4683 | // Log2ofMantissa = | |||
4684 | // -2.51285454f + | |||
4685 | // (4.07009056f + | |||
4686 | // (-2.12067489f + | |||
4687 | // (.645142248f - 0.816157886e-1f * x) * x) * x) * x; | |||
4688 | // | |||
4689 | // error 0.0000876136000, which is better than 13 bits | |||
4690 | SDValue t0 = DAG.getNode(ISD::FMUL, dl, MVT::f32, X, | |||
4691 | getF32Constant(DAG, 0xbda7262e, dl)); | |||
4692 | SDValue t1 = DAG.getNode(ISD::FADD, dl, MVT::f32, t0, | |||
4693 | getF32Constant(DAG, 0x3f25280b, dl)); | |||
4694 | SDValue t2 = DAG.getNode(ISD::FMUL, dl, MVT::f32, t1, X); | |||
4695 | SDValue t3 = DAG.getNode(ISD::FSUB, dl, MVT::f32, t2, | |||
4696 | getF32Constant(DAG, 0x4007b923, dl)); | |||
4697 | SDValue t4 = DAG.getNode(ISD::FMUL, dl, MVT::f32, t3, X); | |||
4698 | SDValue t5 = DAG.getNode(ISD::FADD, dl, MVT::f32, t4, | |||
4699 | getF32Constant(DAG, 0x40823e2f, dl)); | |||
4700 | SDValue t6 = DAG.getNode(ISD::FMUL, dl, MVT::f32, t5, X); | |||
4701 | Log2ofMantissa = DAG.getNode(ISD::FSUB, dl, MVT::f32, t6, | |||
4702 | getF32Constant(DAG, 0x4020d29c, dl)); | |||
4703 | } else { // LimitFloatPrecision <= 18 | |||
4704 | // For floating-point precision of 18: | |||
4705 | // | |||
4706 | // Log2ofMantissa = | |||
4707 | // -3.0400495f + | |||
4708 | // (6.1129976f + | |||
4709 | // (-5.3420409f + | |||
4710 | // (3.2865683f + | |||
4711 | // (-1.2669343f + | |||
4712 | // (0.27515199f - | |||
4713 | // 0.25691327e-1f * x) * x) * x) * x) * x) * x; | |||
4714 | // | |||
4715 | // error 0.0000018516, which is better than 18 bits | |||
4716 | SDValue t0 = DAG.getNode(ISD::FMUL, dl, MVT::f32, X, | |||
4717 | getF32Constant(DAG, 0xbcd2769e, dl)); | |||
4718 | SDValue t1 = DAG.getNode(ISD::FADD, dl, MVT::f32, t0, | |||
4719 | getF32Constant(DAG, 0x3e8ce0b9, dl)); | |||
4720 | SDValue t2 = DAG.getNode(ISD::FMUL, dl, MVT::f32, t1, X); | |||
4721 | SDValue t3 = DAG.getNode(ISD::FSUB, dl, MVT::f32, t2, | |||
4722 | getF32Constant(DAG, 0x3fa22ae7, dl)); | |||
4723 | SDValue t4 = DAG.getNode(ISD::FMUL, dl, MVT::f32, t3, X); | |||
4724 | SDValue t5 = DAG.getNode(ISD::FADD, dl, MVT::f32, t4, | |||
4725 | getF32Constant(DAG, 0x40525723, dl)); | |||
4726 | SDValue t6 = DAG.getNode(ISD::FMUL, dl, MVT::f32, t5, X); | |||
4727 | SDValue t7 = DAG.getNode(ISD::FSUB, dl, MVT::f32, t6, | |||
4728 | getF32Constant(DAG, 0x40aaf200, dl)); | |||
4729 | SDValue t8 = DAG.getNode(ISD::FMUL, dl, MVT::f32, t7, X); | |||
4730 | SDValue t9 = DAG.getNode(ISD::FADD, dl, MVT::f32, t8, | |||
4731 | getF32Constant(DAG, 0x40c39dad, dl)); | |||
4732 | SDValue t10 = DAG.getNode(ISD::FMUL, dl, MVT::f32, t9, X); | |||
4733 | Log2ofMantissa = DAG.getNode(ISD::FSUB, dl, MVT::f32, t10, | |||
4734 | getF32Constant(DAG, 0x4042902c, dl)); | |||
4735 | } | |||
4736 | ||||
4737 | return DAG.getNode(ISD::FADD, dl, MVT::f32, LogOfExponent, Log2ofMantissa); | |||
4738 | } | |||
4739 | ||||
4740 | // No special expansion. | |||
4741 | return DAG.getNode(ISD::FLOG2, dl, Op.getValueType(), Op); | |||
4742 | } | |||
4743 | ||||
4744 | /// expandLog10 - Lower a log10 intrinsic. Handles the special sequences for | |||
4745 | /// limited-precision mode. | |||
4746 | static SDValue expandLog10(const SDLoc &dl, SDValue Op, SelectionDAG &DAG, | |||
4747 | const TargetLowering &TLI) { | |||
4748 | // TODO: What fast-math-flags should be set on the floating-point nodes? | |||
4749 | ||||
4750 | if (Op.getValueType() == MVT::f32 && | |||
4751 | LimitFloatPrecision > 0 && LimitFloatPrecision <= 18) { | |||
4752 | SDValue Op1 = DAG.getNode(ISD::BITCAST, dl, MVT::i32, Op); | |||
4753 | ||||
4754 | // Scale the exponent by log10(2) [0.30102999f]. | |||
4755 | SDValue Exp = GetExponent(DAG, Op1, TLI, dl); | |||
4756 | SDValue LogOfExponent = DAG.getNode(ISD::FMUL, dl, MVT::f32, Exp, | |||
4757 | getF32Constant(DAG, 0x3e9a209a, dl)); | |||
4758 | ||||
4759 | // Get the significand and build it into a floating-point number with | |||
4760 | // exponent of 1. | |||
4761 | SDValue X = GetSignificand(DAG, Op1, dl); | |||
4762 | ||||
4763 | SDValue Log10ofMantissa; | |||
4764 | if (LimitFloatPrecision <= 6) { | |||
4765 | // For floating-point precision of 6: | |||
4766 | // | |||
4767 | // Log10ofMantissa = | |||
4768 | // -0.50419619f + | |||
4769 | // (0.60948995f - 0.10380950f * x) * x; | |||
4770 | // | |||
4771 | // error 0.0014886165, which is 6 bits | |||
4772 | SDValue t0 = DAG.getNode(ISD::FMUL, dl, MVT::f32, X, | |||
4773 | getF32Constant(DAG, 0xbdd49a13, dl)); | |||
4774 | SDValue t1 = DAG.getNode(ISD::FADD, dl, MVT::f32, t0, | |||
4775 | getF32Constant(DAG, 0x3f1c0789, dl)); | |||
4776 | SDValue t2 = DAG.getNode(ISD::FMUL, dl, MVT::f32, t1, X); | |||
4777 | Log10ofMantissa = DAG.getNode(ISD::FSUB, dl, MVT::f32, t2, | |||
4778 | getF32Constant(DAG, 0x3f011300, dl)); | |||
4779 | } else if (LimitFloatPrecision <= 12) { | |||
4780 | // For floating-point precision of 12: | |||
4781 | // | |||
4782 | // Log10ofMantissa = | |||
4783 | // -0.64831180f + | |||
4784 | // (0.91751397f + | |||
4785 | // (-0.31664806f + 0.47637168e-1f * x) * x) * x; | |||
4786 | // | |||
4787 | // error 0.00019228036, which is better than 12 bits | |||
4788 | SDValue t0 = DAG.getNode(ISD::FMUL, dl, MVT::f32, X, | |||
4789 | getF32Constant(DAG, 0x3d431f31, dl)); | |||
4790 | SDValue t1 = DAG.getNode(ISD::FSUB, dl, MVT::f32, t0, | |||
4791 | getF32Constant(DAG, 0x3ea21fb2, dl)); | |||
4792 | SDValue t2 = DAG.getNode(ISD::FMUL, dl, MVT::f32, t1, X); | |||
4793 | SDValue t3 = DAG.getNode(ISD::FADD, dl, MVT::f32, t2, | |||
4794 | getF32Constant(DAG, 0x3f6ae232, dl)); | |||
4795 | SDValue t4 = DAG.getNode(ISD::FMUL, dl, MVT::f32, t3, X); | |||
4796 | Log10ofMantissa = DAG.getNode(ISD::FSUB, dl, MVT::f32, t4, | |||
4797 | getF32Constant(DAG, 0x3f25f7c3, dl)); | |||
4798 | } else { // LimitFloatPrecision <= 18 | |||
4799 | // For floating-point precision of 18: | |||
4800 | // | |||
4801 | // Log10ofMantissa = | |||
4802 | // -0.84299375f + | |||
4803 | // (1.5327582f + | |||
4804 | // (-1.0688956f + | |||
4805 | // (0.49102474f + | |||
4806 | // (-0.12539807f + 0.13508273e-1f * x) * x) * x) * x) * x; | |||
4807 | // | |||
4808 | // error 0.0000037995730, which is better than 18 bits | |||
4809 | SDValue t0 = DAG.getNode(ISD::FMUL, dl, MVT::f32, X, | |||
4810 | getF32Constant(DAG, 0x3c5d51ce, dl)); | |||
4811 | SDValue t1 = DAG.getNode(ISD::FSUB, dl, MVT::f32, t0, | |||
4812 | getF32Constant(DAG, 0x3e00685a, dl)); | |||
4813 | SDValue t2 = DAG.getNode(ISD::FMUL, dl, MVT::f32, t1, X); | |||
4814 | SDValue t3 = DAG.getNode(ISD::FADD, dl, MVT::f32, t2, | |||
4815 | getF32Constant(DAG, 0x3efb6798, dl)); | |||
4816 | SDValue t4 = DAG.getNode(ISD::FMUL, dl, MVT::f32, t3, X); | |||
4817 | SDValue t5 = DAG.getNode(ISD::FSUB, dl, MVT::f32, t4, | |||
4818 | getF32Constant(DAG, 0x3f88d192, dl)); | |||
4819 | SDValue t6 = DAG.getNode(ISD::FMUL, dl, MVT::f32, t5, X); | |||
4820 | SDValue t7 = DAG.getNode(ISD::FADD, dl, MVT::f32, t6, | |||
4821 | getF32Constant(DAG, 0x3fc4316c, dl)); | |||
4822 | SDValue t8 = DAG.getNode(ISD::FMUL, dl, MVT::f32, t7, X); | |||
4823 | Log10ofMantissa = DAG.getNode(ISD::FSUB, dl, MVT::f32, t8, | |||
4824 | getF32Constant(DAG, 0x3f57ce70, dl)); | |||
4825 | } | |||
4826 | ||||
4827 | return DAG.getNode(ISD::FADD, dl, MVT::f32, LogOfExponent, Log10ofMantissa); | |||
4828 | } | |||
4829 | ||||
4830 | // No special expansion. | |||
4831 | return DAG.getNode(ISD::FLOG10, dl, Op.getValueType(), Op); | |||
4832 | } | |||
4833 | ||||
4834 | /// expandExp2 - Lower an exp2 intrinsic. Handles the special sequences for | |||
4835 | /// limited-precision mode. | |||
4836 | static SDValue expandExp2(const SDLoc &dl, SDValue Op, SelectionDAG &DAG, | |||
4837 | const TargetLowering &TLI) { | |||
4838 | if (Op.getValueType() == MVT::f32 && | |||
4839 | LimitFloatPrecision > 0 && LimitFloatPrecision <= 18) | |||
4840 | return getLimitedPrecisionExp2(Op, dl, DAG); | |||
4841 | ||||
4842 | // No special expansion. | |||
4843 | return DAG.getNode(ISD::FEXP2, dl, Op.getValueType(), Op); | |||
4844 | } | |||
4845 | ||||
4846 | /// visitPow - Lower a pow intrinsic. Handles the special sequences for | |||
4847 | /// limited-precision mode with x == 10.0f. | |||
4848 | static SDValue expandPow(const SDLoc &dl, SDValue LHS, SDValue RHS, | |||
4849 | SelectionDAG &DAG, const TargetLowering &TLI) { | |||
4850 | bool IsExp10 = false; | |||
4851 | if (LHS.getValueType() == MVT::f32 && RHS.getValueType() == MVT::f32 && | |||
4852 | LimitFloatPrecision > 0 && LimitFloatPrecision <= 18) { | |||
4853 | if (ConstantFPSDNode *LHSC = dyn_cast<ConstantFPSDNode>(LHS)) { | |||
4854 | APFloat Ten(10.0f); | |||
4855 | IsExp10 = LHSC->isExactlyValue(Ten); | |||
4856 | } | |||
4857 | } | |||
4858 | ||||
4859 | // TODO: What fast-math-flags should be set on the FMUL node? | |||
4860 | if (IsExp10) { | |||
4861 | // Put the exponent in the right bit position for later addition to the | |||
4862 | // final result: | |||
4863 | // | |||
4864 | // #define LOG2OF10 3.3219281f | |||
4865 | // t0 = Op * LOG2OF10; | |||
4866 | SDValue t0 = DAG.getNode(ISD::FMUL, dl, MVT::f32, RHS, | |||
4867 | getF32Constant(DAG, 0x40549a78, dl)); | |||
4868 | return getLimitedPrecisionExp2(t0, dl, DAG); | |||
4869 | } | |||
4870 | ||||
4871 | // No special expansion. | |||
4872 | return DAG.getNode(ISD::FPOW, dl, LHS.getValueType(), LHS, RHS); | |||
4873 | } | |||
4874 | ||||
4875 | /// ExpandPowI - Expand a llvm.powi intrinsic. | |||
4876 | static SDValue ExpandPowI(const SDLoc &DL, SDValue LHS, SDValue RHS, | |||
4877 | SelectionDAG &DAG) { | |||
4878 | // If RHS is a constant, we can expand this out to a multiplication tree, | |||
4879 | // otherwise we end up lowering to a call to __powidf2 (for example). When | |||
4880 | // optimizing for size, we only want to do this if the expansion would produce | |||
4881 | // a small number of multiplies, otherwise we do the full expansion. | |||
4882 | if (ConstantSDNode *RHSC = dyn_cast<ConstantSDNode>(RHS)) { | |||
4883 | // Get the exponent as a positive value. | |||
4884 | unsigned Val = RHSC->getSExtValue(); | |||
4885 | if ((int)Val < 0) Val = -Val; | |||
4886 | ||||
4887 | // powi(x, 0) -> 1.0 | |||
4888 | if (Val == 0) | |||
4889 | return DAG.getConstantFP(1.0, DL, LHS.getValueType()); | |||
4890 | ||||
4891 | const Function &F = DAG.getMachineFunction().getFunction(); | |||
4892 | if (!F.optForSize() || | |||
4893 | // If optimizing for size, don't insert too many multiplies. | |||
4894 | // This inserts up to 5 multiplies. | |||
4895 | countPopulation(Val) + Log2_32(Val) < 7) { | |||
4896 | // We use the simple binary decomposition method to generate the multiply | |||
4897 | // sequence. There are more optimal ways to do this (for example, | |||
4898 | // powi(x,15) generates one more multiply than it should), but this has | |||
4899 | // the benefit of being both really simple and much better than a libcall. | |||
4900 | SDValue Res; // Logically starts equal to 1.0 | |||
4901 | SDValue CurSquare = LHS; | |||
4902 | // TODO: Intrinsics should have fast-math-flags that propagate to these | |||
4903 | // nodes. | |||
4904 | while (Val) { | |||
4905 | if (Val & 1) { | |||
4906 | if (Res.getNode()) | |||
4907 | Res = DAG.getNode(ISD::FMUL, DL,Res.getValueType(), Res, CurSquare); | |||
4908 | else | |||
4909 | Res = CurSquare; // 1.0*CurSquare. | |||
4910 | } | |||
4911 | ||||
4912 | CurSquare = DAG.getNode(ISD::FMUL, DL, CurSquare.getValueType(), | |||
4913 | CurSquare, CurSquare); | |||
4914 | Val >>= 1; | |||
4915 | } | |||
4916 | ||||
4917 | // If the original was negative, invert the result, producing 1/(x*x*x). | |||
4918 | if (RHSC->getSExtValue() < 0) | |||
4919 | Res = DAG.getNode(ISD::FDIV, DL, LHS.getValueType(), | |||
4920 | DAG.getConstantFP(1.0, DL, LHS.getValueType()), Res); | |||
4921 | return Res; | |||
4922 | } | |||
4923 | } | |||
4924 | ||||
4925 | // Otherwise, expand to a libcall. | |||
4926 | return DAG.getNode(ISD::FPOWI, DL, LHS.getValueType(), LHS, RHS); | |||
4927 | } | |||
4928 | ||||
4929 | // getUnderlyingArgReg - Find underlying register used for a truncated or | |||
4930 | // bitcasted argument. | |||
4931 | static unsigned getUnderlyingArgReg(const SDValue &N) { | |||
4932 | switch (N.getOpcode()) { | |||
4933 | case ISD::CopyFromReg: | |||
4934 | return cast<RegisterSDNode>(N.getOperand(1))->getReg(); | |||
4935 | case ISD::BITCAST: | |||
4936 | case ISD::AssertZext: | |||
4937 | case ISD::AssertSext: | |||
4938 | case ISD::TRUNCATE: | |||
4939 | return getUnderlyingArgReg(N.getOperand(0)); | |||
4940 | default: | |||
4941 | return 0; | |||
4942 | } | |||
4943 | } | |||
4944 | ||||
4945 | /// If the DbgValueInst is a dbg_value of a function argument, create the | |||
4946 | /// corresponding DBG_VALUE machine instruction for it now. At the end of | |||
4947 | /// instruction selection, they will be inserted to the entry BB. | |||
4948 | bool SelectionDAGBuilder::EmitFuncArgumentDbgValue( | |||
4949 | const Value *V, DILocalVariable *Variable, DIExpression *Expr, | |||
4950 | DILocation *DL, bool IsDbgDeclare, const SDValue &N) { | |||
4951 | const Argument *Arg = dyn_cast<Argument>(V); | |||
4952 | if (!Arg) | |||
4953 | return false; | |||
4954 | ||||
4955 | MachineFunction &MF = DAG.getMachineFunction(); | |||
4956 | const TargetInstrInfo *TII = DAG.getSubtarget().getInstrInfo(); | |||
4957 | ||||
4958 | bool IsIndirect = false; | |||
4959 | Optional<MachineOperand> Op; | |||
4960 | // Some arguments' frame index is recorded during argument lowering. | |||
4961 | int FI = FuncInfo.getArgumentFrameIndex(Arg); | |||
4962 | if (FI != std::numeric_limits<int>::max()) | |||
4963 | Op = MachineOperand::CreateFI(FI); | |||
4964 | ||||
4965 | if (!Op && N.getNode()) { | |||
4966 | unsigned Reg = getUnderlyingArgReg(N); | |||
4967 | if (Reg && TargetRegisterInfo::isVirtualRegister(Reg)) { | |||
4968 | MachineRegisterInfo &RegInfo = MF.getRegInfo(); | |||
4969 | unsigned PR = RegInfo.getLiveInPhysReg(Reg); | |||
4970 | if (PR) | |||
4971 | Reg = PR; | |||
4972 | } | |||
4973 | if (Reg) { | |||
4974 | Op = MachineOperand::CreateReg(Reg, false); | |||
4975 | IsIndirect = IsDbgDeclare; | |||
4976 | } | |||
4977 | } | |||
4978 | ||||
4979 | if (!Op && N.getNode()) | |||
4980 | // Check if frame index is available. | |||
4981 | if (LoadSDNode *LNode = dyn_cast<LoadSDNode>(N.getNode())) | |||
4982 | if (FrameIndexSDNode *FINode = | |||
4983 | dyn_cast<FrameIndexSDNode>(LNode->getBasePtr().getNode())) | |||
4984 | Op = MachineOperand::CreateFI(FINode->getIndex()); | |||
4985 | ||||
4986 | if (!Op) { | |||
4987 | // Check if ValueMap has reg number. | |||
4988 | DenseMap<const Value *, unsigned>::iterator VMI = FuncInfo.ValueMap.find(V); | |||
4989 | if (VMI != FuncInfo.ValueMap.end()) { | |||
4990 | const auto &TLI = DAG.getTargetLoweringInfo(); | |||
4991 | RegsForValue RFV(V->getContext(), TLI, DAG.getDataLayout(), VMI->second, | |||
4992 | V->getType(), getABIRegCopyCC(V)); | |||
4993 | if (RFV.occupiesMultipleRegs()) { | |||
4994 | unsigned Offset = 0; | |||
4995 | for (auto RegAndSize : RFV.getRegsAndSizes()) { | |||
4996 | Op = MachineOperand::CreateReg(RegAndSize.first, false); | |||
4997 | auto FragmentExpr = DIExpression::createFragmentExpression( | |||
4998 | Expr, Offset, RegAndSize.second); | |||
4999 | if (!FragmentExpr) | |||
5000 | continue; | |||
5001 | FuncInfo.ArgDbgValues.push_back( | |||
5002 | BuildMI(MF, DL, TII->get(TargetOpcode::DBG_VALUE), IsDbgDeclare, | |||
5003 | Op->getReg(), Variable, *FragmentExpr)); | |||
5004 | Offset += RegAndSize.second; | |||
5005 | } | |||
5006 | return true; | |||
5007 | } | |||
5008 | Op = MachineOperand::CreateReg(VMI->second, false); | |||
5009 | IsIndirect = IsDbgDeclare; | |||
5010 | } | |||
5011 | } | |||
5012 | ||||
5013 | if (!Op) | |||
5014 | return false; | |||
5015 | ||||
5016 | assert(Variable->isValidLocationForIntrinsic(DL) &&((Variable->isValidLocationForIntrinsic(DL) && "Expected inlined-at fields to agree" ) ? static_cast<void> (0) : __assert_fail ("Variable->isValidLocationForIntrinsic(DL) && \"Expected inlined-at fields to agree\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 5017, __PRETTY_FUNCTION__)) | |||
5017 | "Expected inlined-at fields to agree")((Variable->isValidLocationForIntrinsic(DL) && "Expected inlined-at fields to agree" ) ? static_cast<void> (0) : __assert_fail ("Variable->isValidLocationForIntrinsic(DL) && \"Expected inlined-at fields to agree\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 5017, __PRETTY_FUNCTION__)); | |||
5018 | IsIndirect = (Op->isReg()) ? IsIndirect : true; | |||
5019 | FuncInfo.ArgDbgValues.push_back( | |||
5020 | BuildMI(MF, DL, TII->get(TargetOpcode::DBG_VALUE), IsIndirect, | |||
5021 | *Op, Variable, Expr)); | |||
5022 | ||||
5023 | return true; | |||
5024 | } | |||
5025 | ||||
5026 | /// Return the appropriate SDDbgValue based on N. | |||
5027 | SDDbgValue *SelectionDAGBuilder::getDbgValue(SDValue N, | |||
5028 | DILocalVariable *Variable, | |||
5029 | DIExpression *Expr, | |||
5030 | const DebugLoc &dl, | |||
5031 | unsigned DbgSDNodeOrder) { | |||
5032 | if (auto *FISDN = dyn_cast<FrameIndexSDNode>(N.getNode())) { | |||
5033 | // Construct a FrameIndexDbgValue for FrameIndexSDNodes so we can describe | |||
5034 | // stack slot locations. | |||
5035 | // | |||
5036 | // Consider "int x = 0; int *px = &x;". There are two kinds of interesting | |||
5037 | // debug values here after optimization: | |||
5038 | // | |||
5039 | // dbg.value(i32* %px, !"int *px", !DIExpression()), and | |||
5040 | // dbg.value(i32* %px, !"int x", !DIExpression(DW_OP_deref)) | |||
5041 | // | |||
5042 | // Both describe the direct values of their associated variables. | |||
5043 | return DAG.getFrameIndexDbgValue(Variable, Expr, FISDN->getIndex(), | |||
5044 | /*IsIndirect*/ false, dl, DbgSDNodeOrder); | |||
5045 | } | |||
5046 | return DAG.getDbgValue(Variable, Expr, N.getNode(), N.getResNo(), | |||
5047 | /*IsIndirect*/ false, dl, DbgSDNodeOrder); | |||
5048 | } | |||
5049 | ||||
5050 | // VisualStudio defines setjmp as _setjmp | |||
5051 | #if defined(_MSC_VER) && defined(setjmp) && \ | |||
5052 | !defined(setjmp_undefined_for_msvc) | |||
5053 | # pragma push_macro("setjmp") | |||
5054 | # undef setjmp | |||
5055 | # define setjmp_undefined_for_msvc | |||
5056 | #endif | |||
5057 | ||||
5058 | /// Lower the call to the specified intrinsic function. If we want to emit this | |||
5059 | /// as a call to a named external function, return the name. Otherwise, lower it | |||
5060 | /// and return null. | |||
5061 | const char * | |||
5062 | SelectionDAGBuilder::visitIntrinsicCall(const CallInst &I, unsigned Intrinsic) { | |||
5063 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
5064 | SDLoc sdl = getCurSDLoc(); | |||
5065 | DebugLoc dl = getCurDebugLoc(); | |||
5066 | SDValue Res; | |||
5067 | ||||
5068 | switch (Intrinsic) { | |||
5069 | default: | |||
5070 | // By default, turn this into a target intrinsic node. | |||
5071 | visitTargetIntrinsic(I, Intrinsic); | |||
5072 | return nullptr; | |||
5073 | case Intrinsic::vastart: visitVAStart(I); return nullptr; | |||
5074 | case Intrinsic::vaend: visitVAEnd(I); return nullptr; | |||
5075 | case Intrinsic::vacopy: visitVACopy(I); return nullptr; | |||
5076 | case Intrinsic::returnaddress: | |||
5077 | setValue(&I, DAG.getNode(ISD::RETURNADDR, sdl, | |||
5078 | TLI.getPointerTy(DAG.getDataLayout()), | |||
5079 | getValue(I.getArgOperand(0)))); | |||
5080 | return nullptr; | |||
5081 | case Intrinsic::addressofreturnaddress: | |||
5082 | setValue(&I, DAG.getNode(ISD::ADDROFRETURNADDR, sdl, | |||
5083 | TLI.getPointerTy(DAG.getDataLayout()))); | |||
5084 | return nullptr; | |||
5085 | case Intrinsic::sponentry: | |||
5086 | setValue(&I, DAG.getNode(ISD::SPONENTRY, sdl, | |||
5087 | TLI.getPointerTy(DAG.getDataLayout()))); | |||
5088 | return nullptr; | |||
5089 | case Intrinsic::frameaddress: | |||
5090 | setValue(&I, DAG.getNode(ISD::FRAMEADDR, sdl, | |||
5091 | TLI.getPointerTy(DAG.getDataLayout()), | |||
5092 | getValue(I.getArgOperand(0)))); | |||
5093 | return nullptr; | |||
5094 | case Intrinsic::read_register: { | |||
5095 | Value *Reg = I.getArgOperand(0); | |||
5096 | SDValue Chain = getRoot(); | |||
5097 | SDValue RegName = | |||
5098 | DAG.getMDNode(cast<MDNode>(cast<MetadataAsValue>(Reg)->getMetadata())); | |||
5099 | EVT VT = TLI.getValueType(DAG.getDataLayout(), I.getType()); | |||
5100 | Res = DAG.getNode(ISD::READ_REGISTER, sdl, | |||
5101 | DAG.getVTList(VT, MVT::Other), Chain, RegName); | |||
5102 | setValue(&I, Res); | |||
5103 | DAG.setRoot(Res.getValue(1)); | |||
5104 | return nullptr; | |||
5105 | } | |||
5106 | case Intrinsic::write_register: { | |||
5107 | Value *Reg = I.getArgOperand(0); | |||
5108 | Value *RegValue = I.getArgOperand(1); | |||
5109 | SDValue Chain = getRoot(); | |||
5110 | SDValue RegName = | |||
5111 | DAG.getMDNode(cast<MDNode>(cast<MetadataAsValue>(Reg)->getMetadata())); | |||
5112 | DAG.setRoot(DAG.getNode(ISD::WRITE_REGISTER, sdl, MVT::Other, Chain, | |||
5113 | RegName, getValue(RegValue))); | |||
5114 | return nullptr; | |||
5115 | } | |||
5116 | case Intrinsic::setjmp: | |||
5117 | return &"_setjmp"[!TLI.usesUnderscoreSetJmp()]; | |||
5118 | case Intrinsic::longjmp: | |||
5119 | return &"_longjmp"[!TLI.usesUnderscoreLongJmp()]; | |||
5120 | case Intrinsic::memcpy: { | |||
5121 | const auto &MCI = cast<MemCpyInst>(I); | |||
5122 | SDValue Op1 = getValue(I.getArgOperand(0)); | |||
5123 | SDValue Op2 = getValue(I.getArgOperand(1)); | |||
5124 | SDValue Op3 = getValue(I.getArgOperand(2)); | |||
5125 | // @llvm.memcpy defines 0 and 1 to both mean no alignment. | |||
5126 | unsigned DstAlign = std::max<unsigned>(MCI.getDestAlignment(), 1); | |||
5127 | unsigned SrcAlign = std::max<unsigned>(MCI.getSourceAlignment(), 1); | |||
5128 | unsigned Align = MinAlign(DstAlign, SrcAlign); | |||
5129 | bool isVol = MCI.isVolatile(); | |||
5130 | bool isTC = I.isTailCall() && isInTailCallPosition(&I, DAG.getTarget()); | |||
5131 | // FIXME: Support passing different dest/src alignments to the memcpy DAG | |||
5132 | // node. | |||
5133 | SDValue MC = DAG.getMemcpy(getRoot(), sdl, Op1, Op2, Op3, Align, isVol, | |||
5134 | false, isTC, | |||
5135 | MachinePointerInfo(I.getArgOperand(0)), | |||
5136 | MachinePointerInfo(I.getArgOperand(1))); | |||
5137 | updateDAGForMaybeTailCall(MC); | |||
5138 | return nullptr; | |||
5139 | } | |||
5140 | case Intrinsic::memset: { | |||
5141 | const auto &MSI = cast<MemSetInst>(I); | |||
5142 | SDValue Op1 = getValue(I.getArgOperand(0)); | |||
5143 | SDValue Op2 = getValue(I.getArgOperand(1)); | |||
5144 | SDValue Op3 = getValue(I.getArgOperand(2)); | |||
5145 | // @llvm.memset defines 0 and 1 to both mean no alignment. | |||
5146 | unsigned Align = std::max<unsigned>(MSI.getDestAlignment(), 1); | |||
5147 | bool isVol = MSI.isVolatile(); | |||
5148 | bool isTC = I.isTailCall() && isInTailCallPosition(&I, DAG.getTarget()); | |||
5149 | SDValue MS = DAG.getMemset(getRoot(), sdl, Op1, Op2, Op3, Align, isVol, | |||
5150 | isTC, MachinePointerInfo(I.getArgOperand(0))); | |||
5151 | updateDAGForMaybeTailCall(MS); | |||
5152 | return nullptr; | |||
5153 | } | |||
5154 | case Intrinsic::memmove: { | |||
5155 | const auto &MMI = cast<MemMoveInst>(I); | |||
5156 | SDValue Op1 = getValue(I.getArgOperand(0)); | |||
5157 | SDValue Op2 = getValue(I.getArgOperand(1)); | |||
5158 | SDValue Op3 = getValue(I.getArgOperand(2)); | |||
5159 | // @llvm.memmove defines 0 and 1 to both mean no alignment. | |||
5160 | unsigned DstAlign = std::max<unsigned>(MMI.getDestAlignment(), 1); | |||
5161 | unsigned SrcAlign = std::max<unsigned>(MMI.getSourceAlignment(), 1); | |||
5162 | unsigned Align = MinAlign(DstAlign, SrcAlign); | |||
5163 | bool isVol = MMI.isVolatile(); | |||
5164 | bool isTC = I.isTailCall() && isInTailCallPosition(&I, DAG.getTarget()); | |||
5165 | // FIXME: Support passing different dest/src alignments to the memmove DAG | |||
5166 | // node. | |||
5167 | SDValue MM = DAG.getMemmove(getRoot(), sdl, Op1, Op2, Op3, Align, isVol, | |||
5168 | isTC, MachinePointerInfo(I.getArgOperand(0)), | |||
5169 | MachinePointerInfo(I.getArgOperand(1))); | |||
5170 | updateDAGForMaybeTailCall(MM); | |||
5171 | return nullptr; | |||
5172 | } | |||
5173 | case Intrinsic::memcpy_element_unordered_atomic: { | |||
5174 | const AtomicMemCpyInst &MI = cast<AtomicMemCpyInst>(I); | |||
5175 | SDValue Dst = getValue(MI.getRawDest()); | |||
5176 | SDValue Src = getValue(MI.getRawSource()); | |||
5177 | SDValue Length = getValue(MI.getLength()); | |||
5178 | ||||
5179 | unsigned DstAlign = MI.getDestAlignment(); | |||
5180 | unsigned SrcAlign = MI.getSourceAlignment(); | |||
5181 | Type *LengthTy = MI.getLength()->getType(); | |||
5182 | unsigned ElemSz = MI.getElementSizeInBytes(); | |||
5183 | bool isTC = I.isTailCall() && isInTailCallPosition(&I, DAG.getTarget()); | |||
5184 | SDValue MC = DAG.getAtomicMemcpy(getRoot(), sdl, Dst, DstAlign, Src, | |||
5185 | SrcAlign, Length, LengthTy, ElemSz, isTC, | |||
5186 | MachinePointerInfo(MI.getRawDest()), | |||
5187 | MachinePointerInfo(MI.getRawSource())); | |||
5188 | updateDAGForMaybeTailCall(MC); | |||
5189 | return nullptr; | |||
5190 | } | |||
5191 | case Intrinsic::memmove_element_unordered_atomic: { | |||
5192 | auto &MI = cast<AtomicMemMoveInst>(I); | |||
5193 | SDValue Dst = getValue(MI.getRawDest()); | |||
5194 | SDValue Src = getValue(MI.getRawSource()); | |||
5195 | SDValue Length = getValue(MI.getLength()); | |||
5196 | ||||
5197 | unsigned DstAlign = MI.getDestAlignment(); | |||
5198 | unsigned SrcAlign = MI.getSourceAlignment(); | |||
5199 | Type *LengthTy = MI.getLength()->getType(); | |||
5200 | unsigned ElemSz = MI.getElementSizeInBytes(); | |||
5201 | bool isTC = I.isTailCall() && isInTailCallPosition(&I, DAG.getTarget()); | |||
5202 | SDValue MC = DAG.getAtomicMemmove(getRoot(), sdl, Dst, DstAlign, Src, | |||
5203 | SrcAlign, Length, LengthTy, ElemSz, isTC, | |||
5204 | MachinePointerInfo(MI.getRawDest()), | |||
5205 | MachinePointerInfo(MI.getRawSource())); | |||
5206 | updateDAGForMaybeTailCall(MC); | |||
5207 | return nullptr; | |||
5208 | } | |||
5209 | case Intrinsic::memset_element_unordered_atomic: { | |||
5210 | auto &MI = cast<AtomicMemSetInst>(I); | |||
5211 | SDValue Dst = getValue(MI.getRawDest()); | |||
5212 | SDValue Val = getValue(MI.getValue()); | |||
5213 | SDValue Length = getValue(MI.getLength()); | |||
5214 | ||||
5215 | unsigned DstAlign = MI.getDestAlignment(); | |||
5216 | Type *LengthTy = MI.getLength()->getType(); | |||
5217 | unsigned ElemSz = MI.getElementSizeInBytes(); | |||
5218 | bool isTC = I.isTailCall() && isInTailCallPosition(&I, DAG.getTarget()); | |||
5219 | SDValue MC = DAG.getAtomicMemset(getRoot(), sdl, Dst, DstAlign, Val, Length, | |||
5220 | LengthTy, ElemSz, isTC, | |||
5221 | MachinePointerInfo(MI.getRawDest())); | |||
5222 | updateDAGForMaybeTailCall(MC); | |||
5223 | return nullptr; | |||
5224 | } | |||
5225 | case Intrinsic::dbg_addr: | |||
5226 | case Intrinsic::dbg_declare: { | |||
5227 | const auto &DI = cast<DbgVariableIntrinsic>(I); | |||
5228 | DILocalVariable *Variable = DI.getVariable(); | |||
5229 | DIExpression *Expression = DI.getExpression(); | |||
5230 | dropDanglingDebugInfo(Variable, Expression); | |||
5231 | assert(Variable && "Missing variable")((Variable && "Missing variable") ? static_cast<void > (0) : __assert_fail ("Variable && \"Missing variable\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 5231, __PRETTY_FUNCTION__)); | |||
5232 | ||||
5233 | // Check if address has undef value. | |||
5234 | const Value *Address = DI.getVariableLocation(); | |||
5235 | if (!Address || isa<UndefValue>(Address) || | |||
5236 | (Address->use_empty() && !isa<Argument>(Address))) { | |||
5237 | LLVM_DEBUG(dbgs() << "Dropping debug info for " << DI << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { dbgs() << "Dropping debug info for " << DI << "\n"; } } while (false); | |||
5238 | return nullptr; | |||
5239 | } | |||
5240 | ||||
5241 | bool isParameter = Variable->isParameter() || isa<Argument>(Address); | |||
5242 | ||||
5243 | // Check if this variable can be described by a frame index, typically | |||
5244 | // either as a static alloca or a byval parameter. | |||
5245 | int FI = std::numeric_limits<int>::max(); | |||
5246 | if (const auto *AI = | |||
5247 | dyn_cast<AllocaInst>(Address->stripInBoundsConstantOffsets())) { | |||
5248 | if (AI->isStaticAlloca()) { | |||
5249 | auto I = FuncInfo.StaticAllocaMap.find(AI); | |||
5250 | if (I != FuncInfo.StaticAllocaMap.end()) | |||
5251 | FI = I->second; | |||
5252 | } | |||
5253 | } else if (const auto *Arg = dyn_cast<Argument>( | |||
5254 | Address->stripInBoundsConstantOffsets())) { | |||
5255 | FI = FuncInfo.getArgumentFrameIndex(Arg); | |||
5256 | } | |||
5257 | ||||
5258 | // llvm.dbg.addr is control dependent and always generates indirect | |||
5259 | // DBG_VALUE instructions. llvm.dbg.declare is handled as a frame index in | |||
5260 | // the MachineFunction variable table. | |||
5261 | if (FI != std::numeric_limits<int>::max()) { | |||
5262 | if (Intrinsic == Intrinsic::dbg_addr) { | |||
5263 | SDDbgValue *SDV = DAG.getFrameIndexDbgValue( | |||
5264 | Variable, Expression, FI, /*IsIndirect*/ true, dl, SDNodeOrder); | |||
5265 | DAG.AddDbgValue(SDV, getRoot().getNode(), isParameter); | |||
5266 | } | |||
5267 | return nullptr; | |||
5268 | } | |||
5269 | ||||
5270 | SDValue &N = NodeMap[Address]; | |||
5271 | if (!N.getNode() && isa<Argument>(Address)) | |||
5272 | // Check unused arguments map. | |||
5273 | N = UnusedArgNodeMap[Address]; | |||
5274 | SDDbgValue *SDV; | |||
5275 | if (N.getNode()) { | |||
5276 | if (const BitCastInst *BCI = dyn_cast<BitCastInst>(Address)) | |||
5277 | Address = BCI->getOperand(0); | |||
5278 | // Parameters are handled specially. | |||
5279 | auto FINode = dyn_cast<FrameIndexSDNode>(N.getNode()); | |||
5280 | if (isParameter && FINode) { | |||
5281 | // Byval parameter. We have a frame index at this point. | |||
5282 | SDV = | |||
5283 | DAG.getFrameIndexDbgValue(Variable, Expression, FINode->getIndex(), | |||
5284 | /*IsIndirect*/ true, dl, SDNodeOrder); | |||
5285 | } else if (isa<Argument>(Address)) { | |||
5286 | // Address is an argument, so try to emit its dbg value using | |||
5287 | // virtual register info from the FuncInfo.ValueMap. | |||
5288 | EmitFuncArgumentDbgValue(Address, Variable, Expression, dl, true, N); | |||
5289 | return nullptr; | |||
5290 | } else { | |||
5291 | SDV = DAG.getDbgValue(Variable, Expression, N.getNode(), N.getResNo(), | |||
5292 | true, dl, SDNodeOrder); | |||
5293 | } | |||
5294 | DAG.AddDbgValue(SDV, N.getNode(), isParameter); | |||
5295 | } else { | |||
5296 | // If Address is an argument then try to emit its dbg value using | |||
5297 | // virtual register info from the FuncInfo.ValueMap. | |||
5298 | if (!EmitFuncArgumentDbgValue(Address, Variable, Expression, dl, true, | |||
5299 | N)) { | |||
5300 | LLVM_DEBUG(dbgs() << "Dropping debug info for " << DI << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { dbgs() << "Dropping debug info for " << DI << "\n"; } } while (false); | |||
5301 | } | |||
5302 | } | |||
5303 | return nullptr; | |||
5304 | } | |||
5305 | case Intrinsic::dbg_label: { | |||
5306 | const DbgLabelInst &DI = cast<DbgLabelInst>(I); | |||
5307 | DILabel *Label = DI.getLabel(); | |||
5308 | assert(Label && "Missing label")((Label && "Missing label") ? static_cast<void> (0) : __assert_fail ("Label && \"Missing label\"", "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 5308, __PRETTY_FUNCTION__)); | |||
5309 | ||||
5310 | SDDbgLabel *SDV; | |||
5311 | SDV = DAG.getDbgLabel(Label, dl, SDNodeOrder); | |||
5312 | DAG.AddDbgLabel(SDV); | |||
5313 | return nullptr; | |||
5314 | } | |||
5315 | case Intrinsic::dbg_value: { | |||
5316 | const DbgValueInst &DI = cast<DbgValueInst>(I); | |||
5317 | assert(DI.getVariable() && "Missing variable")((DI.getVariable() && "Missing variable") ? static_cast <void> (0) : __assert_fail ("DI.getVariable() && \"Missing variable\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 5317, __PRETTY_FUNCTION__)); | |||
5318 | ||||
5319 | DILocalVariable *Variable = DI.getVariable(); | |||
5320 | DIExpression *Expression = DI.getExpression(); | |||
5321 | dropDanglingDebugInfo(Variable, Expression); | |||
5322 | const Value *V = DI.getValue(); | |||
5323 | if (!V) | |||
5324 | return nullptr; | |||
5325 | ||||
5326 | SDDbgValue *SDV; | |||
5327 | if (isa<ConstantInt>(V) || isa<ConstantFP>(V) || isa<UndefValue>(V) || | |||
5328 | isa<ConstantPointerNull>(V)) { | |||
5329 | SDV = DAG.getConstantDbgValue(Variable, Expression, V, dl, SDNodeOrder); | |||
5330 | DAG.AddDbgValue(SDV, nullptr, false); | |||
5331 | return nullptr; | |||
5332 | } | |||
5333 | ||||
5334 | // Do not use getValue() in here; we don't want to generate code at | |||
5335 | // this point if it hasn't been done yet. | |||
5336 | SDValue N = NodeMap[V]; | |||
5337 | if (!N.getNode() && isa<Argument>(V)) // Check unused arguments map. | |||
5338 | N = UnusedArgNodeMap[V]; | |||
5339 | if (N.getNode()) { | |||
5340 | if (EmitFuncArgumentDbgValue(V, Variable, Expression, dl, false, N)) | |||
5341 | return nullptr; | |||
5342 | SDV = getDbgValue(N, Variable, Expression, dl, SDNodeOrder); | |||
5343 | DAG.AddDbgValue(SDV, N.getNode(), false); | |||
5344 | return nullptr; | |||
5345 | } | |||
5346 | ||||
5347 | // PHI nodes have already been selected, so we should know which VReg that | |||
5348 | // is assigns to already. | |||
5349 | if (isa<PHINode>(V)) { | |||
5350 | auto VMI = FuncInfo.ValueMap.find(V); | |||
5351 | if (VMI != FuncInfo.ValueMap.end()) { | |||
5352 | unsigned Reg = VMI->second; | |||
5353 | // The PHI node may be split up into several MI PHI nodes (in | |||
5354 | // FunctionLoweringInfo::set). | |||
5355 | RegsForValue RFV(V->getContext(), TLI, DAG.getDataLayout(), Reg, | |||
5356 | V->getType(), None); | |||
5357 | if (RFV.occupiesMultipleRegs()) { | |||
5358 | unsigned Offset = 0; | |||
5359 | unsigned BitsToDescribe = 0; | |||
5360 | if (auto VarSize = Variable->getSizeInBits()) | |||
5361 | BitsToDescribe = *VarSize; | |||
5362 | if (auto Fragment = Expression->getFragmentInfo()) | |||
5363 | BitsToDescribe = Fragment->SizeInBits; | |||
5364 | for (auto RegAndSize : RFV.getRegsAndSizes()) { | |||
5365 | unsigned RegisterSize = RegAndSize.second; | |||
5366 | // Bail out if all bits are described already. | |||
5367 | if (Offset >= BitsToDescribe) | |||
5368 | break; | |||
5369 | unsigned FragmentSize = (Offset + RegisterSize > BitsToDescribe) | |||
5370 | ? BitsToDescribe - Offset | |||
5371 | : RegisterSize; | |||
5372 | auto FragmentExpr = DIExpression::createFragmentExpression( | |||
5373 | Expression, Offset, FragmentSize); | |||
5374 | if (!FragmentExpr) | |||
5375 | continue; | |||
5376 | SDV = DAG.getVRegDbgValue(Variable, *FragmentExpr, RegAndSize.first, | |||
5377 | false, dl, SDNodeOrder); | |||
5378 | DAG.AddDbgValue(SDV, nullptr, false); | |||
5379 | Offset += RegisterSize; | |||
5380 | } | |||
5381 | } else { | |||
5382 | SDV = DAG.getVRegDbgValue(Variable, Expression, Reg, false, dl, | |||
5383 | SDNodeOrder); | |||
5384 | DAG.AddDbgValue(SDV, nullptr, false); | |||
5385 | } | |||
5386 | return nullptr; | |||
5387 | } | |||
5388 | } | |||
5389 | ||||
5390 | // TODO: When we get here we will either drop the dbg.value completely, or | |||
5391 | // we try to move it forward by letting it dangle for awhile. So we should | |||
5392 | // probably add an extra DbgValue to the DAG here, with a reference to | |||
5393 | // "noreg", to indicate that we have lost the debug location for the | |||
5394 | // variable. | |||
5395 | ||||
5396 | if (!V->use_empty() ) { | |||
5397 | // Do not call getValue(V) yet, as we don't want to generate code. | |||
5398 | // Remember it for later. | |||
5399 | DanglingDebugInfoMap[V].emplace_back(&DI, dl, SDNodeOrder); | |||
5400 | return nullptr; | |||
5401 | } | |||
5402 | ||||
5403 | LLVM_DEBUG(dbgs() << "Dropping debug location info for:\n " << DI << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { dbgs() << "Dropping debug location info for:\n " << DI << "\n"; } } while (false); | |||
5404 | LLVM_DEBUG(dbgs() << " Last seen at:\n " << *V << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { dbgs() << " Last seen at:\n " << * V << "\n"; } } while (false); | |||
5405 | return nullptr; | |||
5406 | } | |||
5407 | ||||
5408 | case Intrinsic::eh_typeid_for: { | |||
5409 | // Find the type id for the given typeinfo. | |||
5410 | GlobalValue *GV = ExtractTypeInfo(I.getArgOperand(0)); | |||
5411 | unsigned TypeID = DAG.getMachineFunction().getTypeIDFor(GV); | |||
5412 | Res = DAG.getConstant(TypeID, sdl, MVT::i32); | |||
5413 | setValue(&I, Res); | |||
5414 | return nullptr; | |||
5415 | } | |||
5416 | ||||
5417 | case Intrinsic::eh_return_i32: | |||
5418 | case Intrinsic::eh_return_i64: | |||
5419 | DAG.getMachineFunction().setCallsEHReturn(true); | |||
5420 | DAG.setRoot(DAG.getNode(ISD::EH_RETURN, sdl, | |||
5421 | MVT::Other, | |||
5422 | getControlRoot(), | |||
5423 | getValue(I.getArgOperand(0)), | |||
5424 | getValue(I.getArgOperand(1)))); | |||
5425 | return nullptr; | |||
5426 | case Intrinsic::eh_unwind_init: | |||
5427 | DAG.getMachineFunction().setCallsUnwindInit(true); | |||
5428 | return nullptr; | |||
5429 | case Intrinsic::eh_dwarf_cfa: | |||
5430 | setValue(&I, DAG.getNode(ISD::EH_DWARF_CFA, sdl, | |||
5431 | TLI.getPointerTy(DAG.getDataLayout()), | |||
5432 | getValue(I.getArgOperand(0)))); | |||
5433 | return nullptr; | |||
5434 | case Intrinsic::eh_sjlj_callsite: { | |||
5435 | MachineModuleInfo &MMI = DAG.getMachineFunction().getMMI(); | |||
5436 | ConstantInt *CI = dyn_cast<ConstantInt>(I.getArgOperand(0)); | |||
5437 | assert(CI && "Non-constant call site value in eh.sjlj.callsite!")((CI && "Non-constant call site value in eh.sjlj.callsite!" ) ? static_cast<void> (0) : __assert_fail ("CI && \"Non-constant call site value in eh.sjlj.callsite!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 5437, __PRETTY_FUNCTION__)); | |||
5438 | assert(MMI.getCurrentCallSite() == 0 && "Overlapping call sites!")((MMI.getCurrentCallSite() == 0 && "Overlapping call sites!" ) ? static_cast<void> (0) : __assert_fail ("MMI.getCurrentCallSite() == 0 && \"Overlapping call sites!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 5438, __PRETTY_FUNCTION__)); | |||
5439 | ||||
5440 | MMI.setCurrentCallSite(CI->getZExtValue()); | |||
5441 | return nullptr; | |||
5442 | } | |||
5443 | case Intrinsic::eh_sjlj_functioncontext: { | |||
5444 | // Get and store the index of the function context. | |||
5445 | MachineFrameInfo &MFI = DAG.getMachineFunction().getFrameInfo(); | |||
5446 | AllocaInst *FnCtx = | |||
5447 | cast<AllocaInst>(I.getArgOperand(0)->stripPointerCasts()); | |||
5448 | int FI = FuncInfo.StaticAllocaMap[FnCtx]; | |||
5449 | MFI.setFunctionContextIndex(FI); | |||
5450 | return nullptr; | |||
5451 | } | |||
5452 | case Intrinsic::eh_sjlj_setjmp: { | |||
5453 | SDValue Ops[2]; | |||
5454 | Ops[0] = getRoot(); | |||
5455 | Ops[1] = getValue(I.getArgOperand(0)); | |||
5456 | SDValue Op = DAG.getNode(ISD::EH_SJLJ_SETJMP, sdl, | |||
5457 | DAG.getVTList(MVT::i32, MVT::Other), Ops); | |||
5458 | setValue(&I, Op.getValue(0)); | |||
5459 | DAG.setRoot(Op.getValue(1)); | |||
5460 | return nullptr; | |||
5461 | } | |||
5462 | case Intrinsic::eh_sjlj_longjmp: | |||
5463 | DAG.setRoot(DAG.getNode(ISD::EH_SJLJ_LONGJMP, sdl, MVT::Other, | |||
5464 | getRoot(), getValue(I.getArgOperand(0)))); | |||
5465 | return nullptr; | |||
5466 | case Intrinsic::eh_sjlj_setup_dispatch: | |||
5467 | DAG.setRoot(DAG.getNode(ISD::EH_SJLJ_SETUP_DISPATCH, sdl, MVT::Other, | |||
5468 | getRoot())); | |||
5469 | return nullptr; | |||
5470 | case Intrinsic::masked_gather: | |||
5471 | visitMaskedGather(I); | |||
5472 | return nullptr; | |||
5473 | case Intrinsic::masked_load: | |||
5474 | visitMaskedLoad(I); | |||
5475 | return nullptr; | |||
5476 | case Intrinsic::masked_scatter: | |||
5477 | visitMaskedScatter(I); | |||
5478 | return nullptr; | |||
5479 | case Intrinsic::masked_store: | |||
5480 | visitMaskedStore(I); | |||
5481 | return nullptr; | |||
5482 | case Intrinsic::masked_expandload: | |||
5483 | visitMaskedLoad(I, true /* IsExpanding */); | |||
5484 | return nullptr; | |||
5485 | case Intrinsic::masked_compressstore: | |||
5486 | visitMaskedStore(I, true /* IsCompressing */); | |||
5487 | return nullptr; | |||
5488 | case Intrinsic::x86_mmx_pslli_w: | |||
5489 | case Intrinsic::x86_mmx_pslli_d: | |||
5490 | case Intrinsic::x86_mmx_pslli_q: | |||
5491 | case Intrinsic::x86_mmx_psrli_w: | |||
5492 | case Intrinsic::x86_mmx_psrli_d: | |||
5493 | case Intrinsic::x86_mmx_psrli_q: | |||
5494 | case Intrinsic::x86_mmx_psrai_w: | |||
5495 | case Intrinsic::x86_mmx_psrai_d: { | |||
5496 | SDValue ShAmt = getValue(I.getArgOperand(1)); | |||
5497 | if (isa<ConstantSDNode>(ShAmt)) { | |||
5498 | visitTargetIntrinsic(I, Intrinsic); | |||
5499 | return nullptr; | |||
5500 | } | |||
5501 | unsigned NewIntrinsic = 0; | |||
5502 | EVT ShAmtVT = MVT::v2i32; | |||
5503 | switch (Intrinsic) { | |||
5504 | case Intrinsic::x86_mmx_pslli_w: | |||
5505 | NewIntrinsic = Intrinsic::x86_mmx_psll_w; | |||
5506 | break; | |||
5507 | case Intrinsic::x86_mmx_pslli_d: | |||
5508 | NewIntrinsic = Intrinsic::x86_mmx_psll_d; | |||
5509 | break; | |||
5510 | case Intrinsic::x86_mmx_pslli_q: | |||
5511 | NewIntrinsic = Intrinsic::x86_mmx_psll_q; | |||
5512 | break; | |||
5513 | case Intrinsic::x86_mmx_psrli_w: | |||
5514 | NewIntrinsic = Intrinsic::x86_mmx_psrl_w; | |||
5515 | break; | |||
5516 | case Intrinsic::x86_mmx_psrli_d: | |||
5517 | NewIntrinsic = Intrinsic::x86_mmx_psrl_d; | |||
5518 | break; | |||
5519 | case Intrinsic::x86_mmx_psrli_q: | |||
5520 | NewIntrinsic = Intrinsic::x86_mmx_psrl_q; | |||
5521 | break; | |||
5522 | case Intrinsic::x86_mmx_psrai_w: | |||
5523 | NewIntrinsic = Intrinsic::x86_mmx_psra_w; | |||
5524 | break; | |||
5525 | case Intrinsic::x86_mmx_psrai_d: | |||
5526 | NewIntrinsic = Intrinsic::x86_mmx_psra_d; | |||
5527 | break; | |||
5528 | default: llvm_unreachable("Impossible intrinsic")::llvm::llvm_unreachable_internal("Impossible intrinsic", "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 5528); // Can't reach here. | |||
5529 | } | |||
5530 | ||||
5531 | // The vector shift intrinsics with scalars uses 32b shift amounts but | |||
5532 | // the sse2/mmx shift instructions reads 64 bits. Set the upper 32 bits | |||
5533 | // to be zero. | |||
5534 | // We must do this early because v2i32 is not a legal type. | |||
5535 | SDValue ShOps[2]; | |||
5536 | ShOps[0] = ShAmt; | |||
5537 | ShOps[1] = DAG.getConstant(0, sdl, MVT::i32); | |||
5538 | ShAmt = DAG.getBuildVector(ShAmtVT, sdl, ShOps); | |||
5539 | EVT DestVT = TLI.getValueType(DAG.getDataLayout(), I.getType()); | |||
5540 | ShAmt = DAG.getNode(ISD::BITCAST, sdl, DestVT, ShAmt); | |||
5541 | Res = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, sdl, DestVT, | |||
5542 | DAG.getConstant(NewIntrinsic, sdl, MVT::i32), | |||
5543 | getValue(I.getArgOperand(0)), ShAmt); | |||
5544 | setValue(&I, Res); | |||
5545 | return nullptr; | |||
5546 | } | |||
5547 | case Intrinsic::powi: | |||
5548 | setValue(&I, ExpandPowI(sdl, getValue(I.getArgOperand(0)), | |||
5549 | getValue(I.getArgOperand(1)), DAG)); | |||
5550 | return nullptr; | |||
5551 | case Intrinsic::log: | |||
5552 | setValue(&I, expandLog(sdl, getValue(I.getArgOperand(0)), DAG, TLI)); | |||
5553 | return nullptr; | |||
5554 | case Intrinsic::log2: | |||
5555 | setValue(&I, expandLog2(sdl, getValue(I.getArgOperand(0)), DAG, TLI)); | |||
5556 | return nullptr; | |||
5557 | case Intrinsic::log10: | |||
5558 | setValue(&I, expandLog10(sdl, getValue(I.getArgOperand(0)), DAG, TLI)); | |||
5559 | return nullptr; | |||
5560 | case Intrinsic::exp: | |||
5561 | setValue(&I, expandExp(sdl, getValue(I.getArgOperand(0)), DAG, TLI)); | |||
5562 | return nullptr; | |||
5563 | case Intrinsic::exp2: | |||
5564 | setValue(&I, expandExp2(sdl, getValue(I.getArgOperand(0)), DAG, TLI)); | |||
5565 | return nullptr; | |||
5566 | case Intrinsic::pow: | |||
5567 | setValue(&I, expandPow(sdl, getValue(I.getArgOperand(0)), | |||
5568 | getValue(I.getArgOperand(1)), DAG, TLI)); | |||
5569 | return nullptr; | |||
5570 | case Intrinsic::sqrt: | |||
5571 | case Intrinsic::fabs: | |||
5572 | case Intrinsic::sin: | |||
5573 | case Intrinsic::cos: | |||
5574 | case Intrinsic::floor: | |||
5575 | case Intrinsic::ceil: | |||
5576 | case Intrinsic::trunc: | |||
5577 | case Intrinsic::rint: | |||
5578 | case Intrinsic::nearbyint: | |||
5579 | case Intrinsic::round: | |||
5580 | case Intrinsic::canonicalize: { | |||
5581 | unsigned Opcode; | |||
5582 | switch (Intrinsic) { | |||
5583 | default: llvm_unreachable("Impossible intrinsic")::llvm::llvm_unreachable_internal("Impossible intrinsic", "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 5583); // Can't reach here. | |||
5584 | case Intrinsic::sqrt: Opcode = ISD::FSQRT; break; | |||
5585 | case Intrinsic::fabs: Opcode = ISD::FABS; break; | |||
5586 | case Intrinsic::sin: Opcode = ISD::FSIN; break; | |||
5587 | case Intrinsic::cos: Opcode = ISD::FCOS; break; | |||
5588 | case Intrinsic::floor: Opcode = ISD::FFLOOR; break; | |||
5589 | case Intrinsic::ceil: Opcode = ISD::FCEIL; break; | |||
5590 | case Intrinsic::trunc: Opcode = ISD::FTRUNC; break; | |||
5591 | case Intrinsic::rint: Opcode = ISD::FRINT; break; | |||
5592 | case Intrinsic::nearbyint: Opcode = ISD::FNEARBYINT; break; | |||
5593 | case Intrinsic::round: Opcode = ISD::FROUND; break; | |||
5594 | case Intrinsic::canonicalize: Opcode = ISD::FCANONICALIZE; break; | |||
5595 | } | |||
5596 | ||||
5597 | setValue(&I, DAG.getNode(Opcode, sdl, | |||
5598 | getValue(I.getArgOperand(0)).getValueType(), | |||
5599 | getValue(I.getArgOperand(0)))); | |||
5600 | return nullptr; | |||
5601 | } | |||
5602 | case Intrinsic::minnum: { | |||
5603 | auto VT = getValue(I.getArgOperand(0)).getValueType(); | |||
5604 | unsigned Opc = | |||
5605 | I.hasNoNaNs() && TLI.isOperationLegalOrCustom(ISD::FMINIMUM, VT) | |||
5606 | ? ISD::FMINIMUM | |||
5607 | : ISD::FMINNUM; | |||
5608 | setValue(&I, DAG.getNode(Opc, sdl, VT, | |||
5609 | getValue(I.getArgOperand(0)), | |||
5610 | getValue(I.getArgOperand(1)))); | |||
5611 | return nullptr; | |||
5612 | } | |||
5613 | case Intrinsic::maxnum: { | |||
5614 | auto VT = getValue(I.getArgOperand(0)).getValueType(); | |||
5615 | unsigned Opc = | |||
5616 | I.hasNoNaNs() && TLI.isOperationLegalOrCustom(ISD::FMAXIMUM, VT) | |||
5617 | ? ISD::FMAXIMUM | |||
5618 | : ISD::FMAXNUM; | |||
5619 | setValue(&I, DAG.getNode(Opc, sdl, VT, | |||
5620 | getValue(I.getArgOperand(0)), | |||
5621 | getValue(I.getArgOperand(1)))); | |||
5622 | return nullptr; | |||
5623 | } | |||
5624 | case Intrinsic::minimum: | |||
5625 | setValue(&I, DAG.getNode(ISD::FMINIMUM, sdl, | |||
5626 | getValue(I.getArgOperand(0)).getValueType(), | |||
5627 | getValue(I.getArgOperand(0)), | |||
5628 | getValue(I.getArgOperand(1)))); | |||
5629 | return nullptr; | |||
5630 | case Intrinsic::maximum: | |||
5631 | setValue(&I, DAG.getNode(ISD::FMAXIMUM, sdl, | |||
5632 | getValue(I.getArgOperand(0)).getValueType(), | |||
5633 | getValue(I.getArgOperand(0)), | |||
5634 | getValue(I.getArgOperand(1)))); | |||
5635 | return nullptr; | |||
5636 | case Intrinsic::copysign: | |||
5637 | setValue(&I, DAG.getNode(ISD::FCOPYSIGN, sdl, | |||
5638 | getValue(I.getArgOperand(0)).getValueType(), | |||
5639 | getValue(I.getArgOperand(0)), | |||
5640 | getValue(I.getArgOperand(1)))); | |||
5641 | return nullptr; | |||
5642 | case Intrinsic::fma: | |||
5643 | setValue(&I, DAG.getNode(ISD::FMA, sdl, | |||
5644 | getValue(I.getArgOperand(0)).getValueType(), | |||
5645 | getValue(I.getArgOperand(0)), | |||
5646 | getValue(I.getArgOperand(1)), | |||
5647 | getValue(I.getArgOperand(2)))); | |||
5648 | return nullptr; | |||
5649 | case Intrinsic::experimental_constrained_fadd: | |||
5650 | case Intrinsic::experimental_constrained_fsub: | |||
5651 | case Intrinsic::experimental_constrained_fmul: | |||
5652 | case Intrinsic::experimental_constrained_fdiv: | |||
5653 | case Intrinsic::experimental_constrained_frem: | |||
5654 | case Intrinsic::experimental_constrained_fma: | |||
5655 | case Intrinsic::experimental_constrained_sqrt: | |||
5656 | case Intrinsic::experimental_constrained_pow: | |||
5657 | case Intrinsic::experimental_constrained_powi: | |||
5658 | case Intrinsic::experimental_constrained_sin: | |||
5659 | case Intrinsic::experimental_constrained_cos: | |||
5660 | case Intrinsic::experimental_constrained_exp: | |||
5661 | case Intrinsic::experimental_constrained_exp2: | |||
5662 | case Intrinsic::experimental_constrained_log: | |||
5663 | case Intrinsic::experimental_constrained_log10: | |||
5664 | case Intrinsic::experimental_constrained_log2: | |||
5665 | case Intrinsic::experimental_constrained_rint: | |||
5666 | case Intrinsic::experimental_constrained_nearbyint: | |||
5667 | case Intrinsic::experimental_constrained_maxnum: | |||
5668 | case Intrinsic::experimental_constrained_minnum: | |||
5669 | case Intrinsic::experimental_constrained_ceil: | |||
5670 | case Intrinsic::experimental_constrained_floor: | |||
5671 | case Intrinsic::experimental_constrained_round: | |||
5672 | case Intrinsic::experimental_constrained_trunc: | |||
5673 | visitConstrainedFPIntrinsic(cast<ConstrainedFPIntrinsic>(I)); | |||
5674 | return nullptr; | |||
5675 | case Intrinsic::fmuladd: { | |||
5676 | EVT VT = TLI.getValueType(DAG.getDataLayout(), I.getType()); | |||
5677 | if (TM.Options.AllowFPOpFusion != FPOpFusion::Strict && | |||
5678 | TLI.isFMAFasterThanFMulAndFAdd(VT)) { | |||
5679 | setValue(&I, DAG.getNode(ISD::FMA, sdl, | |||
5680 | getValue(I.getArgOperand(0)).getValueType(), | |||
5681 | getValue(I.getArgOperand(0)), | |||
5682 | getValue(I.getArgOperand(1)), | |||
5683 | getValue(I.getArgOperand(2)))); | |||
5684 | } else { | |||
5685 | // TODO: Intrinsic calls should have fast-math-flags. | |||
5686 | SDValue Mul = DAG.getNode(ISD::FMUL, sdl, | |||
5687 | getValue(I.getArgOperand(0)).getValueType(), | |||
5688 | getValue(I.getArgOperand(0)), | |||
5689 | getValue(I.getArgOperand(1))); | |||
5690 | SDValue Add = DAG.getNode(ISD::FADD, sdl, | |||
5691 | getValue(I.getArgOperand(0)).getValueType(), | |||
5692 | Mul, | |||
5693 | getValue(I.getArgOperand(2))); | |||
5694 | setValue(&I, Add); | |||
5695 | } | |||
5696 | return nullptr; | |||
5697 | } | |||
5698 | case Intrinsic::convert_to_fp16: | |||
5699 | setValue(&I, DAG.getNode(ISD::BITCAST, sdl, MVT::i16, | |||
5700 | DAG.getNode(ISD::FP_ROUND, sdl, MVT::f16, | |||
5701 | getValue(I.getArgOperand(0)), | |||
5702 | DAG.getTargetConstant(0, sdl, | |||
5703 | MVT::i32)))); | |||
5704 | return nullptr; | |||
5705 | case Intrinsic::convert_from_fp16: | |||
5706 | setValue(&I, DAG.getNode(ISD::FP_EXTEND, sdl, | |||
5707 | TLI.getValueType(DAG.getDataLayout(), I.getType()), | |||
5708 | DAG.getNode(ISD::BITCAST, sdl, MVT::f16, | |||
5709 | getValue(I.getArgOperand(0))))); | |||
5710 | return nullptr; | |||
5711 | case Intrinsic::pcmarker: { | |||
5712 | SDValue Tmp = getValue(I.getArgOperand(0)); | |||
5713 | DAG.setRoot(DAG.getNode(ISD::PCMARKER, sdl, MVT::Other, getRoot(), Tmp)); | |||
5714 | return nullptr; | |||
5715 | } | |||
5716 | case Intrinsic::readcyclecounter: { | |||
5717 | SDValue Op = getRoot(); | |||
5718 | Res = DAG.getNode(ISD::READCYCLECOUNTER, sdl, | |||
5719 | DAG.getVTList(MVT::i64, MVT::Other), Op); | |||
5720 | setValue(&I, Res); | |||
5721 | DAG.setRoot(Res.getValue(1)); | |||
5722 | return nullptr; | |||
5723 | } | |||
5724 | case Intrinsic::bitreverse: | |||
5725 | setValue(&I, DAG.getNode(ISD::BITREVERSE, sdl, | |||
5726 | getValue(I.getArgOperand(0)).getValueType(), | |||
5727 | getValue(I.getArgOperand(0)))); | |||
5728 | return nullptr; | |||
5729 | case Intrinsic::bswap: | |||
5730 | setValue(&I, DAG.getNode(ISD::BSWAP, sdl, | |||
5731 | getValue(I.getArgOperand(0)).getValueType(), | |||
5732 | getValue(I.getArgOperand(0)))); | |||
5733 | return nullptr; | |||
5734 | case Intrinsic::cttz: { | |||
5735 | SDValue Arg = getValue(I.getArgOperand(0)); | |||
5736 | ConstantInt *CI = cast<ConstantInt>(I.getArgOperand(1)); | |||
5737 | EVT Ty = Arg.getValueType(); | |||
5738 | setValue(&I, DAG.getNode(CI->isZero() ? ISD::CTTZ : ISD::CTTZ_ZERO_UNDEF, | |||
5739 | sdl, Ty, Arg)); | |||
5740 | return nullptr; | |||
5741 | } | |||
5742 | case Intrinsic::ctlz: { | |||
5743 | SDValue Arg = getValue(I.getArgOperand(0)); | |||
5744 | ConstantInt *CI = cast<ConstantInt>(I.getArgOperand(1)); | |||
5745 | EVT Ty = Arg.getValueType(); | |||
5746 | setValue(&I, DAG.getNode(CI->isZero() ? ISD::CTLZ : ISD::CTLZ_ZERO_UNDEF, | |||
5747 | sdl, Ty, Arg)); | |||
5748 | return nullptr; | |||
5749 | } | |||
5750 | case Intrinsic::ctpop: { | |||
5751 | SDValue Arg = getValue(I.getArgOperand(0)); | |||
5752 | EVT Ty = Arg.getValueType(); | |||
5753 | setValue(&I, DAG.getNode(ISD::CTPOP, sdl, Ty, Arg)); | |||
5754 | return nullptr; | |||
5755 | } | |||
5756 | case Intrinsic::fshl: | |||
5757 | case Intrinsic::fshr: { | |||
5758 | bool IsFSHL = Intrinsic == Intrinsic::fshl; | |||
5759 | SDValue X = getValue(I.getArgOperand(0)); | |||
5760 | SDValue Y = getValue(I.getArgOperand(1)); | |||
5761 | SDValue Z = getValue(I.getArgOperand(2)); | |||
5762 | EVT VT = X.getValueType(); | |||
5763 | SDValue BitWidthC = DAG.getConstant(VT.getScalarSizeInBits(), sdl, VT); | |||
5764 | SDValue Zero = DAG.getConstant(0, sdl, VT); | |||
5765 | SDValue ShAmt = DAG.getNode(ISD::UREM, sdl, VT, Z, BitWidthC); | |||
5766 | ||||
5767 | auto FunnelOpcode = IsFSHL ? ISD::FSHL : ISD::FSHR; | |||
5768 | if (TLI.isOperationLegalOrCustom(FunnelOpcode, VT)) { | |||
5769 | setValue(&I, DAG.getNode(FunnelOpcode, sdl, VT, X, Y, Z)); | |||
5770 | return nullptr; | |||
5771 | } | |||
5772 | ||||
5773 | // When X == Y, this is rotate. If the data type has a power-of-2 size, we | |||
5774 | // avoid the select that is necessary in the general case to filter out | |||
5775 | // the 0-shift possibility that leads to UB. | |||
5776 | if (X == Y && isPowerOf2_32(VT.getScalarSizeInBits())) { | |||
5777 | auto RotateOpcode = IsFSHL ? ISD::ROTL : ISD::ROTR; | |||
5778 | if (TLI.isOperationLegalOrCustom(RotateOpcode, VT)) { | |||
5779 | setValue(&I, DAG.getNode(RotateOpcode, sdl, VT, X, Z)); | |||
5780 | return nullptr; | |||
5781 | } | |||
5782 | ||||
5783 | // Some targets only rotate one way. Try the opposite direction. | |||
5784 | RotateOpcode = IsFSHL ? ISD::ROTR : ISD::ROTL; | |||
5785 | if (TLI.isOperationLegalOrCustom(RotateOpcode, VT)) { | |||
5786 | // Negate the shift amount because it is safe to ignore the high bits. | |||
5787 | SDValue NegShAmt = DAG.getNode(ISD::SUB, sdl, VT, Zero, Z); | |||
5788 | setValue(&I, DAG.getNode(RotateOpcode, sdl, VT, X, NegShAmt)); | |||
5789 | return nullptr; | |||
5790 | } | |||
5791 | ||||
5792 | // fshl (rotl): (X << (Z % BW)) | (X >> ((0 - Z) % BW)) | |||
5793 | // fshr (rotr): (X << ((0 - Z) % BW)) | (X >> (Z % BW)) | |||
5794 | SDValue NegZ = DAG.getNode(ISD::SUB, sdl, VT, Zero, Z); | |||
5795 | SDValue NShAmt = DAG.getNode(ISD::UREM, sdl, VT, NegZ, BitWidthC); | |||
5796 | SDValue ShX = DAG.getNode(ISD::SHL, sdl, VT, X, IsFSHL ? ShAmt : NShAmt); | |||
5797 | SDValue ShY = DAG.getNode(ISD::SRL, sdl, VT, X, IsFSHL ? NShAmt : ShAmt); | |||
5798 | setValue(&I, DAG.getNode(ISD::OR, sdl, VT, ShX, ShY)); | |||
5799 | return nullptr; | |||
5800 | } | |||
5801 | ||||
5802 | // fshl: (X << (Z % BW)) | (Y >> (BW - (Z % BW))) | |||
5803 | // fshr: (X << (BW - (Z % BW))) | (Y >> (Z % BW)) | |||
5804 | SDValue InvShAmt = DAG.getNode(ISD::SUB, sdl, VT, BitWidthC, ShAmt); | |||
5805 | SDValue ShX = DAG.getNode(ISD::SHL, sdl, VT, X, IsFSHL ? ShAmt : InvShAmt); | |||
5806 | SDValue ShY = DAG.getNode(ISD::SRL, sdl, VT, Y, IsFSHL ? InvShAmt : ShAmt); | |||
5807 | SDValue Or = DAG.getNode(ISD::OR, sdl, VT, ShX, ShY); | |||
5808 | ||||
5809 | // If (Z % BW == 0), then the opposite direction shift is shift-by-bitwidth, | |||
5810 | // and that is undefined. We must compare and select to avoid UB. | |||
5811 | EVT CCVT = MVT::i1; | |||
5812 | if (VT.isVector()) | |||
5813 | CCVT = EVT::getVectorVT(*Context, CCVT, VT.getVectorNumElements()); | |||
5814 | ||||
5815 | // For fshl, 0-shift returns the 1st arg (X). | |||
5816 | // For fshr, 0-shift returns the 2nd arg (Y). | |||
5817 | SDValue IsZeroShift = DAG.getSetCC(sdl, CCVT, ShAmt, Zero, ISD::SETEQ); | |||
5818 | setValue(&I, DAG.getSelect(sdl, VT, IsZeroShift, IsFSHL ? X : Y, Or)); | |||
5819 | return nullptr; | |||
5820 | } | |||
5821 | case Intrinsic::sadd_sat: { | |||
5822 | SDValue Op1 = getValue(I.getArgOperand(0)); | |||
5823 | SDValue Op2 = getValue(I.getArgOperand(1)); | |||
5824 | setValue(&I, DAG.getNode(ISD::SADDSAT, sdl, Op1.getValueType(), Op1, Op2)); | |||
5825 | return nullptr; | |||
5826 | } | |||
5827 | case Intrinsic::uadd_sat: { | |||
5828 | SDValue Op1 = getValue(I.getArgOperand(0)); | |||
5829 | SDValue Op2 = getValue(I.getArgOperand(1)); | |||
5830 | setValue(&I, DAG.getNode(ISD::UADDSAT, sdl, Op1.getValueType(), Op1, Op2)); | |||
5831 | return nullptr; | |||
5832 | } | |||
5833 | case Intrinsic::ssub_sat: { | |||
5834 | SDValue Op1 = getValue(I.getArgOperand(0)); | |||
5835 | SDValue Op2 = getValue(I.getArgOperand(1)); | |||
5836 | setValue(&I, DAG.getNode(ISD::SSUBSAT, sdl, Op1.getValueType(), Op1, Op2)); | |||
5837 | return nullptr; | |||
5838 | } | |||
5839 | case Intrinsic::usub_sat: { | |||
5840 | SDValue Op1 = getValue(I.getArgOperand(0)); | |||
5841 | SDValue Op2 = getValue(I.getArgOperand(1)); | |||
5842 | setValue(&I, DAG.getNode(ISD::USUBSAT, sdl, Op1.getValueType(), Op1, Op2)); | |||
5843 | return nullptr; | |||
5844 | } | |||
5845 | case Intrinsic::smul_fix: { | |||
5846 | SDValue Op1 = getValue(I.getArgOperand(0)); | |||
5847 | SDValue Op2 = getValue(I.getArgOperand(1)); | |||
5848 | SDValue Op3 = getValue(I.getArgOperand(2)); | |||
5849 | setValue(&I, | |||
5850 | DAG.getNode(ISD::SMULFIX, sdl, Op1.getValueType(), Op1, Op2, Op3)); | |||
5851 | return nullptr; | |||
5852 | } | |||
5853 | case Intrinsic::stacksave: { | |||
5854 | SDValue Op = getRoot(); | |||
5855 | Res = DAG.getNode( | |||
5856 | ISD::STACKSAVE, sdl, | |||
5857 | DAG.getVTList(TLI.getPointerTy(DAG.getDataLayout()), MVT::Other), Op); | |||
5858 | setValue(&I, Res); | |||
5859 | DAG.setRoot(Res.getValue(1)); | |||
5860 | return nullptr; | |||
5861 | } | |||
5862 | case Intrinsic::stackrestore: | |||
5863 | Res = getValue(I.getArgOperand(0)); | |||
5864 | DAG.setRoot(DAG.getNode(ISD::STACKRESTORE, sdl, MVT::Other, getRoot(), Res)); | |||
5865 | return nullptr; | |||
5866 | case Intrinsic::get_dynamic_area_offset: { | |||
5867 | SDValue Op = getRoot(); | |||
5868 | EVT PtrTy = TLI.getPointerTy(DAG.getDataLayout()); | |||
5869 | EVT ResTy = TLI.getValueType(DAG.getDataLayout(), I.getType()); | |||
5870 | // Result type for @llvm.get.dynamic.area.offset should match PtrTy for | |||
5871 | // target. | |||
5872 | if (PtrTy != ResTy) | |||
5873 | report_fatal_error("Wrong result type for @llvm.get.dynamic.area.offset" | |||
5874 | " intrinsic!"); | |||
5875 | Res = DAG.getNode(ISD::GET_DYNAMIC_AREA_OFFSET, sdl, DAG.getVTList(ResTy), | |||
5876 | Op); | |||
5877 | DAG.setRoot(Op); | |||
5878 | setValue(&I, Res); | |||
5879 | return nullptr; | |||
5880 | } | |||
5881 | case Intrinsic::stackguard: { | |||
5882 | EVT PtrTy = TLI.getPointerTy(DAG.getDataLayout()); | |||
5883 | MachineFunction &MF = DAG.getMachineFunction(); | |||
5884 | const Module &M = *MF.getFunction().getParent(); | |||
5885 | SDValue Chain = getRoot(); | |||
5886 | if (TLI.useLoadStackGuardNode()) { | |||
5887 | Res = getLoadStackGuard(DAG, sdl, Chain); | |||
5888 | } else { | |||
5889 | const Value *Global = TLI.getSDagStackGuard(M); | |||
5890 | unsigned Align = DL->getPrefTypeAlignment(Global->getType()); | |||
5891 | Res = DAG.getLoad(PtrTy, sdl, Chain, getValue(Global), | |||
5892 | MachinePointerInfo(Global, 0), Align, | |||
5893 | MachineMemOperand::MOVolatile); | |||
5894 | } | |||
5895 | if (TLI.useStackGuardXorFP()) | |||
5896 | Res = TLI.emitStackGuardXorFP(DAG, Res, sdl); | |||
5897 | DAG.setRoot(Chain); | |||
5898 | setValue(&I, Res); | |||
5899 | return nullptr; | |||
5900 | } | |||
5901 | case Intrinsic::stackprotector: { | |||
5902 | // Emit code into the DAG to store the stack guard onto the stack. | |||
5903 | MachineFunction &MF = DAG.getMachineFunction(); | |||
5904 | MachineFrameInfo &MFI = MF.getFrameInfo(); | |||
5905 | EVT PtrTy = TLI.getPointerTy(DAG.getDataLayout()); | |||
5906 | SDValue Src, Chain = getRoot(); | |||
5907 | ||||
5908 | if (TLI.useLoadStackGuardNode()) | |||
5909 | Src = getLoadStackGuard(DAG, sdl, Chain); | |||
5910 | else | |||
5911 | Src = getValue(I.getArgOperand(0)); // The guard's value. | |||
5912 | ||||
5913 | AllocaInst *Slot = cast<AllocaInst>(I.getArgOperand(1)); | |||
5914 | ||||
5915 | int FI = FuncInfo.StaticAllocaMap[Slot]; | |||
5916 | MFI.setStackProtectorIndex(FI); | |||
5917 | ||||
5918 | SDValue FIN = DAG.getFrameIndex(FI, PtrTy); | |||
5919 | ||||
5920 | // Store the stack protector onto the stack. | |||
5921 | Res = DAG.getStore(Chain, sdl, Src, FIN, MachinePointerInfo::getFixedStack( | |||
5922 | DAG.getMachineFunction(), FI), | |||
5923 | /* Alignment = */ 0, MachineMemOperand::MOVolatile); | |||
5924 | setValue(&I, Res); | |||
5925 | DAG.setRoot(Res); | |||
5926 | return nullptr; | |||
5927 | } | |||
5928 | case Intrinsic::objectsize: { | |||
5929 | // If we don't know by now, we're never going to know. | |||
5930 | ConstantInt *CI = dyn_cast<ConstantInt>(I.getArgOperand(1)); | |||
5931 | ||||
5932 | assert(CI && "Non-constant type in __builtin_object_size?")((CI && "Non-constant type in __builtin_object_size?" ) ? static_cast<void> (0) : __assert_fail ("CI && \"Non-constant type in __builtin_object_size?\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 5932, __PRETTY_FUNCTION__)); | |||
5933 | ||||
5934 | SDValue Arg = getValue(I.getCalledValue()); | |||
5935 | EVT Ty = Arg.getValueType(); | |||
5936 | ||||
5937 | if (CI->isZero()) | |||
5938 | Res = DAG.getConstant(-1ULL, sdl, Ty); | |||
5939 | else | |||
5940 | Res = DAG.getConstant(0, sdl, Ty); | |||
5941 | ||||
5942 | setValue(&I, Res); | |||
5943 | return nullptr; | |||
5944 | } | |||
5945 | ||||
5946 | case Intrinsic::is_constant: | |||
5947 | // If this wasn't constant-folded away by now, then it's not a | |||
5948 | // constant. | |||
5949 | setValue(&I, DAG.getConstant(0, sdl, MVT::i1)); | |||
5950 | return nullptr; | |||
5951 | ||||
5952 | case Intrinsic::annotation: | |||
5953 | case Intrinsic::ptr_annotation: | |||
5954 | case Intrinsic::launder_invariant_group: | |||
5955 | case Intrinsic::strip_invariant_group: | |||
5956 | // Drop the intrinsic, but forward the value | |||
5957 | setValue(&I, getValue(I.getOperand(0))); | |||
5958 | return nullptr; | |||
5959 | case Intrinsic::assume: | |||
5960 | case Intrinsic::var_annotation: | |||
5961 | case Intrinsic::sideeffect: | |||
5962 | // Discard annotate attributes, assumptions, and artificial side-effects. | |||
5963 | return nullptr; | |||
5964 | ||||
5965 | case Intrinsic::codeview_annotation: { | |||
5966 | // Emit a label associated with this metadata. | |||
5967 | MachineFunction &MF = DAG.getMachineFunction(); | |||
5968 | MCSymbol *Label = | |||
5969 | MF.getMMI().getContext().createTempSymbol("annotation", true); | |||
5970 | Metadata *MD = cast<MetadataAsValue>(I.getArgOperand(0))->getMetadata(); | |||
5971 | MF.addCodeViewAnnotation(Label, cast<MDNode>(MD)); | |||
5972 | Res = DAG.getLabelNode(ISD::ANNOTATION_LABEL, sdl, getRoot(), Label); | |||
5973 | DAG.setRoot(Res); | |||
5974 | return nullptr; | |||
5975 | } | |||
5976 | ||||
5977 | case Intrinsic::init_trampoline: { | |||
5978 | const Function *F = cast<Function>(I.getArgOperand(1)->stripPointerCasts()); | |||
5979 | ||||
5980 | SDValue Ops[6]; | |||
5981 | Ops[0] = getRoot(); | |||
5982 | Ops[1] = getValue(I.getArgOperand(0)); | |||
5983 | Ops[2] = getValue(I.getArgOperand(1)); | |||
5984 | Ops[3] = getValue(I.getArgOperand(2)); | |||
5985 | Ops[4] = DAG.getSrcValue(I.getArgOperand(0)); | |||
5986 | Ops[5] = DAG.getSrcValue(F); | |||
5987 | ||||
5988 | Res = DAG.getNode(ISD::INIT_TRAMPOLINE, sdl, MVT::Other, Ops); | |||
5989 | ||||
5990 | DAG.setRoot(Res); | |||
5991 | return nullptr; | |||
5992 | } | |||
5993 | case Intrinsic::adjust_trampoline: | |||
5994 | setValue(&I, DAG.getNode(ISD::ADJUST_TRAMPOLINE, sdl, | |||
5995 | TLI.getPointerTy(DAG.getDataLayout()), | |||
5996 | getValue(I.getArgOperand(0)))); | |||
5997 | return nullptr; | |||
5998 | case Intrinsic::gcroot: { | |||
5999 | assert(DAG.getMachineFunction().getFunction().hasGC() &&((DAG.getMachineFunction().getFunction().hasGC() && "only valid in functions with gc specified, enforced by Verifier" ) ? static_cast<void> (0) : __assert_fail ("DAG.getMachineFunction().getFunction().hasGC() && \"only valid in functions with gc specified, enforced by Verifier\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 6000, __PRETTY_FUNCTION__)) | |||
6000 | "only valid in functions with gc specified, enforced by Verifier")((DAG.getMachineFunction().getFunction().hasGC() && "only valid in functions with gc specified, enforced by Verifier" ) ? static_cast<void> (0) : __assert_fail ("DAG.getMachineFunction().getFunction().hasGC() && \"only valid in functions with gc specified, enforced by Verifier\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 6000, __PRETTY_FUNCTION__)); | |||
6001 | assert(GFI && "implied by previous")((GFI && "implied by previous") ? static_cast<void > (0) : __assert_fail ("GFI && \"implied by previous\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 6001, __PRETTY_FUNCTION__)); | |||
6002 | const Value *Alloca = I.getArgOperand(0)->stripPointerCasts(); | |||
6003 | const Constant *TypeMap = cast<Constant>(I.getArgOperand(1)); | |||
6004 | ||||
6005 | FrameIndexSDNode *FI = cast<FrameIndexSDNode>(getValue(Alloca).getNode()); | |||
6006 | GFI->addStackRoot(FI->getIndex(), TypeMap); | |||
6007 | return nullptr; | |||
6008 | } | |||
6009 | case Intrinsic::gcread: | |||
6010 | case Intrinsic::gcwrite: | |||
6011 | llvm_unreachable("GC failed to lower gcread/gcwrite intrinsics!")::llvm::llvm_unreachable_internal("GC failed to lower gcread/gcwrite intrinsics!" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 6011); | |||
6012 | case Intrinsic::flt_rounds: | |||
6013 | setValue(&I, DAG.getNode(ISD::FLT_ROUNDS_, sdl, MVT::i32)); | |||
6014 | return nullptr; | |||
6015 | ||||
6016 | case Intrinsic::expect: | |||
6017 | // Just replace __builtin_expect(exp, c) with EXP. | |||
6018 | setValue(&I, getValue(I.getArgOperand(0))); | |||
6019 | return nullptr; | |||
6020 | ||||
6021 | case Intrinsic::debugtrap: | |||
6022 | case Intrinsic::trap: { | |||
6023 | StringRef TrapFuncName = | |||
6024 | I.getAttributes() | |||
6025 | .getAttribute(AttributeList::FunctionIndex, "trap-func-name") | |||
6026 | .getValueAsString(); | |||
6027 | if (TrapFuncName.empty()) { | |||
6028 | ISD::NodeType Op = (Intrinsic == Intrinsic::trap) ? | |||
6029 | ISD::TRAP : ISD::DEBUGTRAP; | |||
6030 | DAG.setRoot(DAG.getNode(Op, sdl,MVT::Other, getRoot())); | |||
6031 | return nullptr; | |||
6032 | } | |||
6033 | TargetLowering::ArgListTy Args; | |||
6034 | ||||
6035 | TargetLowering::CallLoweringInfo CLI(DAG); | |||
6036 | CLI.setDebugLoc(sdl).setChain(getRoot()).setLibCallee( | |||
6037 | CallingConv::C, I.getType(), | |||
6038 | DAG.getExternalSymbol(TrapFuncName.data(), | |||
6039 | TLI.getPointerTy(DAG.getDataLayout())), | |||
6040 | std::move(Args)); | |||
6041 | ||||
6042 | std::pair<SDValue, SDValue> Result = TLI.LowerCallTo(CLI); | |||
6043 | DAG.setRoot(Result.second); | |||
6044 | return nullptr; | |||
6045 | } | |||
6046 | ||||
6047 | case Intrinsic::uadd_with_overflow: | |||
6048 | case Intrinsic::sadd_with_overflow: | |||
6049 | case Intrinsic::usub_with_overflow: | |||
6050 | case Intrinsic::ssub_with_overflow: | |||
6051 | case Intrinsic::umul_with_overflow: | |||
6052 | case Intrinsic::smul_with_overflow: { | |||
6053 | ISD::NodeType Op; | |||
6054 | switch (Intrinsic) { | |||
6055 | default: llvm_unreachable("Impossible intrinsic")::llvm::llvm_unreachable_internal("Impossible intrinsic", "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 6055); // Can't reach here. | |||
6056 | case Intrinsic::uadd_with_overflow: Op = ISD::UADDO; break; | |||
6057 | case Intrinsic::sadd_with_overflow: Op = ISD::SADDO; break; | |||
6058 | case Intrinsic::usub_with_overflow: Op = ISD::USUBO; break; | |||
6059 | case Intrinsic::ssub_with_overflow: Op = ISD::SSUBO; break; | |||
6060 | case Intrinsic::umul_with_overflow: Op = ISD::UMULO; break; | |||
6061 | case Intrinsic::smul_with_overflow: Op = ISD::SMULO; break; | |||
6062 | } | |||
6063 | SDValue Op1 = getValue(I.getArgOperand(0)); | |||
6064 | SDValue Op2 = getValue(I.getArgOperand(1)); | |||
6065 | ||||
6066 | SDVTList VTs = DAG.getVTList(Op1.getValueType(), MVT::i1); | |||
6067 | setValue(&I, DAG.getNode(Op, sdl, VTs, Op1, Op2)); | |||
6068 | return nullptr; | |||
6069 | } | |||
6070 | case Intrinsic::prefetch: { | |||
6071 | SDValue Ops[5]; | |||
6072 | unsigned rw = cast<ConstantInt>(I.getArgOperand(1))->getZExtValue(); | |||
6073 | auto Flags = rw == 0 ? MachineMemOperand::MOLoad :MachineMemOperand::MOStore; | |||
6074 | Ops[0] = DAG.getRoot(); | |||
6075 | Ops[1] = getValue(I.getArgOperand(0)); | |||
6076 | Ops[2] = getValue(I.getArgOperand(1)); | |||
6077 | Ops[3] = getValue(I.getArgOperand(2)); | |||
6078 | Ops[4] = getValue(I.getArgOperand(3)); | |||
6079 | SDValue Result = DAG.getMemIntrinsicNode(ISD::PREFETCH, sdl, | |||
6080 | DAG.getVTList(MVT::Other), Ops, | |||
6081 | EVT::getIntegerVT(*Context, 8), | |||
6082 | MachinePointerInfo(I.getArgOperand(0)), | |||
6083 | 0, /* align */ | |||
6084 | Flags); | |||
6085 | ||||
6086 | // Chain the prefetch in parallell with any pending loads, to stay out of | |||
6087 | // the way of later optimizations. | |||
6088 | PendingLoads.push_back(Result); | |||
6089 | Result = getRoot(); | |||
6090 | DAG.setRoot(Result); | |||
6091 | return nullptr; | |||
6092 | } | |||
6093 | case Intrinsic::lifetime_start: | |||
6094 | case Intrinsic::lifetime_end: { | |||
6095 | bool IsStart = (Intrinsic == Intrinsic::lifetime_start); | |||
6096 | // Stack coloring is not enabled in O0, discard region information. | |||
6097 | if (TM.getOptLevel() == CodeGenOpt::None) | |||
6098 | return nullptr; | |||
6099 | ||||
6100 | SmallVector<Value *, 4> Allocas; | |||
6101 | GetUnderlyingObjects(I.getArgOperand(1), Allocas, *DL); | |||
6102 | ||||
6103 | for (SmallVectorImpl<Value*>::iterator Object = Allocas.begin(), | |||
6104 | E = Allocas.end(); Object != E; ++Object) { | |||
6105 | AllocaInst *LifetimeObject = dyn_cast_or_null<AllocaInst>(*Object); | |||
6106 | ||||
6107 | // Could not find an Alloca. | |||
6108 | if (!LifetimeObject) | |||
6109 | continue; | |||
6110 | ||||
6111 | // First check that the Alloca is static, otherwise it won't have a | |||
6112 | // valid frame index. | |||
6113 | auto SI = FuncInfo.StaticAllocaMap.find(LifetimeObject); | |||
6114 | if (SI == FuncInfo.StaticAllocaMap.end()) | |||
6115 | return nullptr; | |||
6116 | ||||
6117 | int FI = SI->second; | |||
6118 | ||||
6119 | SDValue Ops[2]; | |||
6120 | Ops[0] = getRoot(); | |||
6121 | Ops[1] = | |||
6122 | DAG.getFrameIndex(FI, TLI.getFrameIndexTy(DAG.getDataLayout()), true); | |||
6123 | unsigned Opcode = (IsStart ? ISD::LIFETIME_START : ISD::LIFETIME_END); | |||
6124 | ||||
6125 | Res = DAG.getNode(Opcode, sdl, MVT::Other, Ops); | |||
6126 | DAG.setRoot(Res); | |||
6127 | } | |||
6128 | return nullptr; | |||
6129 | } | |||
6130 | case Intrinsic::invariant_start: | |||
6131 | // Discard region information. | |||
6132 | setValue(&I, DAG.getUNDEF(TLI.getPointerTy(DAG.getDataLayout()))); | |||
6133 | return nullptr; | |||
6134 | case Intrinsic::invariant_end: | |||
6135 | // Discard region information. | |||
6136 | return nullptr; | |||
6137 | case Intrinsic::clear_cache: | |||
6138 | return TLI.getClearCacheBuiltinName(); | |||
6139 | case Intrinsic::donothing: | |||
6140 | // ignore | |||
6141 | return nullptr; | |||
6142 | case Intrinsic::experimental_stackmap: | |||
6143 | visitStackmap(I); | |||
6144 | return nullptr; | |||
6145 | case Intrinsic::experimental_patchpoint_void: | |||
6146 | case Intrinsic::experimental_patchpoint_i64: | |||
6147 | visitPatchpoint(&I); | |||
6148 | return nullptr; | |||
6149 | case Intrinsic::experimental_gc_statepoint: | |||
6150 | LowerStatepoint(ImmutableStatepoint(&I)); | |||
6151 | return nullptr; | |||
6152 | case Intrinsic::experimental_gc_result: | |||
6153 | visitGCResult(cast<GCResultInst>(I)); | |||
6154 | return nullptr; | |||
6155 | case Intrinsic::experimental_gc_relocate: | |||
6156 | visitGCRelocate(cast<GCRelocateInst>(I)); | |||
6157 | return nullptr; | |||
6158 | case Intrinsic::instrprof_increment: | |||
6159 | llvm_unreachable("instrprof failed to lower an increment")::llvm::llvm_unreachable_internal("instrprof failed to lower an increment" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 6159); | |||
6160 | case Intrinsic::instrprof_value_profile: | |||
6161 | llvm_unreachable("instrprof failed to lower a value profiling call")::llvm::llvm_unreachable_internal("instrprof failed to lower a value profiling call" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 6161); | |||
6162 | case Intrinsic::localescape: { | |||
6163 | MachineFunction &MF = DAG.getMachineFunction(); | |||
6164 | const TargetInstrInfo *TII = DAG.getSubtarget().getInstrInfo(); | |||
6165 | ||||
6166 | // Directly emit some LOCAL_ESCAPE machine instrs. Label assignment emission | |||
6167 | // is the same on all targets. | |||
6168 | for (unsigned Idx = 0, E = I.getNumArgOperands(); Idx < E; ++Idx) { | |||
6169 | Value *Arg = I.getArgOperand(Idx)->stripPointerCasts(); | |||
6170 | if (isa<ConstantPointerNull>(Arg)) | |||
6171 | continue; // Skip null pointers. They represent a hole in index space. | |||
6172 | AllocaInst *Slot = cast<AllocaInst>(Arg); | |||
6173 | assert(FuncInfo.StaticAllocaMap.count(Slot) &&((FuncInfo.StaticAllocaMap.count(Slot) && "can only escape static allocas" ) ? static_cast<void> (0) : __assert_fail ("FuncInfo.StaticAllocaMap.count(Slot) && \"can only escape static allocas\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 6174, __PRETTY_FUNCTION__)) | |||
6174 | "can only escape static allocas")((FuncInfo.StaticAllocaMap.count(Slot) && "can only escape static allocas" ) ? static_cast<void> (0) : __assert_fail ("FuncInfo.StaticAllocaMap.count(Slot) && \"can only escape static allocas\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 6174, __PRETTY_FUNCTION__)); | |||
6175 | int FI = FuncInfo.StaticAllocaMap[Slot]; | |||
6176 | MCSymbol *FrameAllocSym = | |||
6177 | MF.getMMI().getContext().getOrCreateFrameAllocSymbol( | |||
6178 | GlobalValue::dropLLVMManglingEscape(MF.getName()), Idx); | |||
6179 | BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, dl, | |||
6180 | TII->get(TargetOpcode::LOCAL_ESCAPE)) | |||
6181 | .addSym(FrameAllocSym) | |||
6182 | .addFrameIndex(FI); | |||
6183 | } | |||
6184 | ||||
6185 | return nullptr; | |||
6186 | } | |||
6187 | ||||
6188 | case Intrinsic::localrecover: { | |||
6189 | // i8* @llvm.localrecover(i8* %fn, i8* %fp, i32 %idx) | |||
6190 | MachineFunction &MF = DAG.getMachineFunction(); | |||
6191 | MVT PtrVT = TLI.getPointerTy(DAG.getDataLayout(), 0); | |||
6192 | ||||
6193 | // Get the symbol that defines the frame offset. | |||
6194 | auto *Fn = cast<Function>(I.getArgOperand(0)->stripPointerCasts()); | |||
6195 | auto *Idx = cast<ConstantInt>(I.getArgOperand(2)); | |||
6196 | unsigned IdxVal = | |||
6197 | unsigned(Idx->getLimitedValue(std::numeric_limits<int>::max())); | |||
6198 | MCSymbol *FrameAllocSym = | |||
6199 | MF.getMMI().getContext().getOrCreateFrameAllocSymbol( | |||
6200 | GlobalValue::dropLLVMManglingEscape(Fn->getName()), IdxVal); | |||
6201 | ||||
6202 | // Create a MCSymbol for the label to avoid any target lowering | |||
6203 | // that would make this PC relative. | |||
6204 | SDValue OffsetSym = DAG.getMCSymbol(FrameAllocSym, PtrVT); | |||
6205 | SDValue OffsetVal = | |||
6206 | DAG.getNode(ISD::LOCAL_RECOVER, sdl, PtrVT, OffsetSym); | |||
6207 | ||||
6208 | // Add the offset to the FP. | |||
6209 | Value *FP = I.getArgOperand(1); | |||
6210 | SDValue FPVal = getValue(FP); | |||
6211 | SDValue Add = DAG.getNode(ISD::ADD, sdl, PtrVT, FPVal, OffsetVal); | |||
6212 | setValue(&I, Add); | |||
6213 | ||||
6214 | return nullptr; | |||
6215 | } | |||
6216 | ||||
6217 | case Intrinsic::eh_exceptionpointer: | |||
6218 | case Intrinsic::eh_exceptioncode: { | |||
6219 | // Get the exception pointer vreg, copy from it, and resize it to fit. | |||
6220 | const auto *CPI = cast<CatchPadInst>(I.getArgOperand(0)); | |||
6221 | MVT PtrVT = TLI.getPointerTy(DAG.getDataLayout()); | |||
6222 | const TargetRegisterClass *PtrRC = TLI.getRegClassFor(PtrVT); | |||
6223 | unsigned VReg = FuncInfo.getCatchPadExceptionPointerVReg(CPI, PtrRC); | |||
6224 | SDValue N = | |||
6225 | DAG.getCopyFromReg(DAG.getEntryNode(), getCurSDLoc(), VReg, PtrVT); | |||
6226 | if (Intrinsic == Intrinsic::eh_exceptioncode) | |||
6227 | N = DAG.getZExtOrTrunc(N, getCurSDLoc(), MVT::i32); | |||
6228 | setValue(&I, N); | |||
6229 | return nullptr; | |||
6230 | } | |||
6231 | case Intrinsic::xray_customevent: { | |||
6232 | // Here we want to make sure that the intrinsic behaves as if it has a | |||
6233 | // specific calling convention, and only for x86_64. | |||
6234 | // FIXME: Support other platforms later. | |||
6235 | const auto &Triple = DAG.getTarget().getTargetTriple(); | |||
6236 | if (Triple.getArch() != Triple::x86_64 || !Triple.isOSLinux()) | |||
6237 | return nullptr; | |||
6238 | ||||
6239 | SDLoc DL = getCurSDLoc(); | |||
6240 | SmallVector<SDValue, 8> Ops; | |||
6241 | ||||
6242 | // We want to say that we always want the arguments in registers. | |||
6243 | SDValue LogEntryVal = getValue(I.getArgOperand(0)); | |||
6244 | SDValue StrSizeVal = getValue(I.getArgOperand(1)); | |||
6245 | SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue); | |||
6246 | SDValue Chain = getRoot(); | |||
6247 | Ops.push_back(LogEntryVal); | |||
6248 | Ops.push_back(StrSizeVal); | |||
6249 | Ops.push_back(Chain); | |||
6250 | ||||
6251 | // We need to enforce the calling convention for the callsite, so that | |||
6252 | // argument ordering is enforced correctly, and that register allocation can | |||
6253 | // see that some registers may be assumed clobbered and have to preserve | |||
6254 | // them across calls to the intrinsic. | |||
6255 | MachineSDNode *MN = DAG.getMachineNode(TargetOpcode::PATCHABLE_EVENT_CALL, | |||
6256 | DL, NodeTys, Ops); | |||
6257 | SDValue patchableNode = SDValue(MN, 0); | |||
6258 | DAG.setRoot(patchableNode); | |||
6259 | setValue(&I, patchableNode); | |||
6260 | return nullptr; | |||
6261 | } | |||
6262 | case Intrinsic::xray_typedevent: { | |||
6263 | // Here we want to make sure that the intrinsic behaves as if it has a | |||
6264 | // specific calling convention, and only for x86_64. | |||
6265 | // FIXME: Support other platforms later. | |||
6266 | const auto &Triple = DAG.getTarget().getTargetTriple(); | |||
6267 | if (Triple.getArch() != Triple::x86_64 || !Triple.isOSLinux()) | |||
6268 | return nullptr; | |||
6269 | ||||
6270 | SDLoc DL = getCurSDLoc(); | |||
6271 | SmallVector<SDValue, 8> Ops; | |||
6272 | ||||
6273 | // We want to say that we always want the arguments in registers. | |||
6274 | // It's unclear to me how manipulating the selection DAG here forces callers | |||
6275 | // to provide arguments in registers instead of on the stack. | |||
6276 | SDValue LogTypeId = getValue(I.getArgOperand(0)); | |||
6277 | SDValue LogEntryVal = getValue(I.getArgOperand(1)); | |||
6278 | SDValue StrSizeVal = getValue(I.getArgOperand(2)); | |||
6279 | SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue); | |||
6280 | SDValue Chain = getRoot(); | |||
6281 | Ops.push_back(LogTypeId); | |||
6282 | Ops.push_back(LogEntryVal); | |||
6283 | Ops.push_back(StrSizeVal); | |||
6284 | Ops.push_back(Chain); | |||
6285 | ||||
6286 | // We need to enforce the calling convention for the callsite, so that | |||
6287 | // argument ordering is enforced correctly, and that register allocation can | |||
6288 | // see that some registers may be assumed clobbered and have to preserve | |||
6289 | // them across calls to the intrinsic. | |||
6290 | MachineSDNode *MN = DAG.getMachineNode( | |||
6291 | TargetOpcode::PATCHABLE_TYPED_EVENT_CALL, DL, NodeTys, Ops); | |||
6292 | SDValue patchableNode = SDValue(MN, 0); | |||
6293 | DAG.setRoot(patchableNode); | |||
6294 | setValue(&I, patchableNode); | |||
6295 | return nullptr; | |||
6296 | } | |||
6297 | case Intrinsic::experimental_deoptimize: | |||
6298 | LowerDeoptimizeCall(&I); | |||
6299 | return nullptr; | |||
6300 | ||||
6301 | case Intrinsic::experimental_vector_reduce_fadd: | |||
6302 | case Intrinsic::experimental_vector_reduce_fmul: | |||
6303 | case Intrinsic::experimental_vector_reduce_add: | |||
6304 | case Intrinsic::experimental_vector_reduce_mul: | |||
6305 | case Intrinsic::experimental_vector_reduce_and: | |||
6306 | case Intrinsic::experimental_vector_reduce_or: | |||
6307 | case Intrinsic::experimental_vector_reduce_xor: | |||
6308 | case Intrinsic::experimental_vector_reduce_smax: | |||
6309 | case Intrinsic::experimental_vector_reduce_smin: | |||
6310 | case Intrinsic::experimental_vector_reduce_umax: | |||
6311 | case Intrinsic::experimental_vector_reduce_umin: | |||
6312 | case Intrinsic::experimental_vector_reduce_fmax: | |||
6313 | case Intrinsic::experimental_vector_reduce_fmin: | |||
6314 | visitVectorReduce(I, Intrinsic); | |||
6315 | return nullptr; | |||
6316 | ||||
6317 | case Intrinsic::icall_branch_funnel: { | |||
6318 | SmallVector<SDValue, 16> Ops; | |||
6319 | Ops.push_back(DAG.getRoot()); | |||
6320 | Ops.push_back(getValue(I.getArgOperand(0))); | |||
6321 | ||||
6322 | int64_t Offset; | |||
6323 | auto *Base = dyn_cast<GlobalObject>(GetPointerBaseWithConstantOffset( | |||
6324 | I.getArgOperand(1), Offset, DAG.getDataLayout())); | |||
6325 | if (!Base) | |||
6326 | report_fatal_error( | |||
6327 | "llvm.icall.branch.funnel operand must be a GlobalValue"); | |||
6328 | Ops.push_back(DAG.getTargetGlobalAddress(Base, getCurSDLoc(), MVT::i64, 0)); | |||
6329 | ||||
6330 | struct BranchFunnelTarget { | |||
6331 | int64_t Offset; | |||
6332 | SDValue Target; | |||
6333 | }; | |||
6334 | SmallVector<BranchFunnelTarget, 8> Targets; | |||
6335 | ||||
6336 | for (unsigned Op = 1, N = I.getNumArgOperands(); Op != N; Op += 2) { | |||
6337 | auto *ElemBase = dyn_cast<GlobalObject>(GetPointerBaseWithConstantOffset( | |||
6338 | I.getArgOperand(Op), Offset, DAG.getDataLayout())); | |||
6339 | if (ElemBase != Base) | |||
6340 | report_fatal_error("all llvm.icall.branch.funnel operands must refer " | |||
6341 | "to the same GlobalValue"); | |||
6342 | ||||
6343 | SDValue Val = getValue(I.getArgOperand(Op + 1)); | |||
6344 | auto *GA = dyn_cast<GlobalAddressSDNode>(Val); | |||
6345 | if (!GA) | |||
6346 | report_fatal_error( | |||
6347 | "llvm.icall.branch.funnel operand must be a GlobalValue"); | |||
6348 | Targets.push_back({Offset, DAG.getTargetGlobalAddress( | |||
6349 | GA->getGlobal(), getCurSDLoc(), | |||
6350 | Val.getValueType(), GA->getOffset())}); | |||
6351 | } | |||
6352 | llvm::sort(Targets, | |||
6353 | [](const BranchFunnelTarget &T1, const BranchFunnelTarget &T2) { | |||
6354 | return T1.Offset < T2.Offset; | |||
6355 | }); | |||
6356 | ||||
6357 | for (auto &T : Targets) { | |||
6358 | Ops.push_back(DAG.getTargetConstant(T.Offset, getCurSDLoc(), MVT::i32)); | |||
6359 | Ops.push_back(T.Target); | |||
6360 | } | |||
6361 | ||||
6362 | SDValue N(DAG.getMachineNode(TargetOpcode::ICALL_BRANCH_FUNNEL, | |||
6363 | getCurSDLoc(), MVT::Other, Ops), | |||
6364 | 0); | |||
6365 | DAG.setRoot(N); | |||
6366 | setValue(&I, N); | |||
6367 | HasTailCall = true; | |||
6368 | return nullptr; | |||
6369 | } | |||
6370 | ||||
6371 | case Intrinsic::wasm_landingpad_index: | |||
6372 | // Information this intrinsic contained has been transferred to | |||
6373 | // MachineFunction in SelectionDAGISel::PrepareEHLandingPad. We can safely | |||
6374 | // delete it now. | |||
6375 | return nullptr; | |||
6376 | } | |||
6377 | } | |||
6378 | ||||
6379 | void SelectionDAGBuilder::visitConstrainedFPIntrinsic( | |||
6380 | const ConstrainedFPIntrinsic &FPI) { | |||
6381 | SDLoc sdl = getCurSDLoc(); | |||
6382 | unsigned Opcode; | |||
6383 | switch (FPI.getIntrinsicID()) { | |||
6384 | default: llvm_unreachable("Impossible intrinsic")::llvm::llvm_unreachable_internal("Impossible intrinsic", "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 6384); // Can't reach here. | |||
6385 | case Intrinsic::experimental_constrained_fadd: | |||
6386 | Opcode = ISD::STRICT_FADD; | |||
6387 | break; | |||
6388 | case Intrinsic::experimental_constrained_fsub: | |||
6389 | Opcode = ISD::STRICT_FSUB; | |||
6390 | break; | |||
6391 | case Intrinsic::experimental_constrained_fmul: | |||
6392 | Opcode = ISD::STRICT_FMUL; | |||
6393 | break; | |||
6394 | case Intrinsic::experimental_constrained_fdiv: | |||
6395 | Opcode = ISD::STRICT_FDIV; | |||
6396 | break; | |||
6397 | case Intrinsic::experimental_constrained_frem: | |||
6398 | Opcode = ISD::STRICT_FREM; | |||
6399 | break; | |||
6400 | case Intrinsic::experimental_constrained_fma: | |||
6401 | Opcode = ISD::STRICT_FMA; | |||
6402 | break; | |||
6403 | case Intrinsic::experimental_constrained_sqrt: | |||
6404 | Opcode = ISD::STRICT_FSQRT; | |||
6405 | break; | |||
6406 | case Intrinsic::experimental_constrained_pow: | |||
6407 | Opcode = ISD::STRICT_FPOW; | |||
6408 | break; | |||
6409 | case Intrinsic::experimental_constrained_powi: | |||
6410 | Opcode = ISD::STRICT_FPOWI; | |||
6411 | break; | |||
6412 | case Intrinsic::experimental_constrained_sin: | |||
6413 | Opcode = ISD::STRICT_FSIN; | |||
6414 | break; | |||
6415 | case Intrinsic::experimental_constrained_cos: | |||
6416 | Opcode = ISD::STRICT_FCOS; | |||
6417 | break; | |||
6418 | case Intrinsic::experimental_constrained_exp: | |||
6419 | Opcode = ISD::STRICT_FEXP; | |||
6420 | break; | |||
6421 | case Intrinsic::experimental_constrained_exp2: | |||
6422 | Opcode = ISD::STRICT_FEXP2; | |||
6423 | break; | |||
6424 | case Intrinsic::experimental_constrained_log: | |||
6425 | Opcode = ISD::STRICT_FLOG; | |||
6426 | break; | |||
6427 | case Intrinsic::experimental_constrained_log10: | |||
6428 | Opcode = ISD::STRICT_FLOG10; | |||
6429 | break; | |||
6430 | case Intrinsic::experimental_constrained_log2: | |||
6431 | Opcode = ISD::STRICT_FLOG2; | |||
6432 | break; | |||
6433 | case Intrinsic::experimental_constrained_rint: | |||
6434 | Opcode = ISD::STRICT_FRINT; | |||
6435 | break; | |||
6436 | case Intrinsic::experimental_constrained_nearbyint: | |||
6437 | Opcode = ISD::STRICT_FNEARBYINT; | |||
6438 | break; | |||
6439 | case Intrinsic::experimental_constrained_maxnum: | |||
6440 | Opcode = ISD::STRICT_FMAXNUM; | |||
6441 | break; | |||
6442 | case Intrinsic::experimental_constrained_minnum: | |||
6443 | Opcode = ISD::STRICT_FMINNUM; | |||
6444 | break; | |||
6445 | case Intrinsic::experimental_constrained_ceil: | |||
6446 | Opcode = ISD::STRICT_FCEIL; | |||
6447 | break; | |||
6448 | case Intrinsic::experimental_constrained_floor: | |||
6449 | Opcode = ISD::STRICT_FFLOOR; | |||
6450 | break; | |||
6451 | case Intrinsic::experimental_constrained_round: | |||
6452 | Opcode = ISD::STRICT_FROUND; | |||
6453 | break; | |||
6454 | case Intrinsic::experimental_constrained_trunc: | |||
6455 | Opcode = ISD::STRICT_FTRUNC; | |||
6456 | break; | |||
6457 | } | |||
6458 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
6459 | SDValue Chain = getRoot(); | |||
6460 | SmallVector<EVT, 4> ValueVTs; | |||
6461 | ComputeValueVTs(TLI, DAG.getDataLayout(), FPI.getType(), ValueVTs); | |||
6462 | ValueVTs.push_back(MVT::Other); // Out chain | |||
6463 | ||||
6464 | SDVTList VTs = DAG.getVTList(ValueVTs); | |||
6465 | SDValue Result; | |||
6466 | if (FPI.isUnaryOp()) | |||
6467 | Result = DAG.getNode(Opcode, sdl, VTs, | |||
6468 | { Chain, getValue(FPI.getArgOperand(0)) }); | |||
6469 | else if (FPI.isTernaryOp()) | |||
6470 | Result = DAG.getNode(Opcode, sdl, VTs, | |||
6471 | { Chain, getValue(FPI.getArgOperand(0)), | |||
6472 | getValue(FPI.getArgOperand(1)), | |||
6473 | getValue(FPI.getArgOperand(2)) }); | |||
6474 | else | |||
6475 | Result = DAG.getNode(Opcode, sdl, VTs, | |||
6476 | { Chain, getValue(FPI.getArgOperand(0)), | |||
6477 | getValue(FPI.getArgOperand(1)) }); | |||
6478 | ||||
6479 | assert(Result.getNode()->getNumValues() == 2)((Result.getNode()->getNumValues() == 2) ? static_cast< void> (0) : __assert_fail ("Result.getNode()->getNumValues() == 2" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 6479, __PRETTY_FUNCTION__)); | |||
6480 | SDValue OutChain = Result.getValue(1); | |||
6481 | DAG.setRoot(OutChain); | |||
6482 | SDValue FPResult = Result.getValue(0); | |||
6483 | setValue(&FPI, FPResult); | |||
6484 | } | |||
6485 | ||||
6486 | std::pair<SDValue, SDValue> | |||
6487 | SelectionDAGBuilder::lowerInvokable(TargetLowering::CallLoweringInfo &CLI, | |||
6488 | const BasicBlock *EHPadBB) { | |||
6489 | MachineFunction &MF = DAG.getMachineFunction(); | |||
6490 | MachineModuleInfo &MMI = MF.getMMI(); | |||
6491 | MCSymbol *BeginLabel = nullptr; | |||
6492 | ||||
6493 | if (EHPadBB) { | |||
6494 | // Insert a label before the invoke call to mark the try range. This can be | |||
6495 | // used to detect deletion of the invoke via the MachineModuleInfo. | |||
6496 | BeginLabel = MMI.getContext().createTempSymbol(); | |||
6497 | ||||
6498 | // For SjLj, keep track of which landing pads go with which invokes | |||
6499 | // so as to maintain the ordering of pads in the LSDA. | |||
6500 | unsigned CallSiteIndex = MMI.getCurrentCallSite(); | |||
6501 | if (CallSiteIndex) { | |||
6502 | MF.setCallSiteBeginLabel(BeginLabel, CallSiteIndex); | |||
6503 | LPadToCallSiteMap[FuncInfo.MBBMap[EHPadBB]].push_back(CallSiteIndex); | |||
6504 | ||||
6505 | // Now that the call site is handled, stop tracking it. | |||
6506 | MMI.setCurrentCallSite(0); | |||
6507 | } | |||
6508 | ||||
6509 | // Both PendingLoads and PendingExports must be flushed here; | |||
6510 | // this call might not return. | |||
6511 | (void)getRoot(); | |||
6512 | DAG.setRoot(DAG.getEHLabel(getCurSDLoc(), getControlRoot(), BeginLabel)); | |||
6513 | ||||
6514 | CLI.setChain(getRoot()); | |||
6515 | } | |||
6516 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
6517 | std::pair<SDValue, SDValue> Result = TLI.LowerCallTo(CLI); | |||
6518 | ||||
6519 | assert((CLI.IsTailCall || Result.second.getNode()) &&(((CLI.IsTailCall || Result.second.getNode()) && "Non-null chain expected with non-tail call!" ) ? static_cast<void> (0) : __assert_fail ("(CLI.IsTailCall || Result.second.getNode()) && \"Non-null chain expected with non-tail call!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 6520, __PRETTY_FUNCTION__)) | |||
6520 | "Non-null chain expected with non-tail call!")(((CLI.IsTailCall || Result.second.getNode()) && "Non-null chain expected with non-tail call!" ) ? static_cast<void> (0) : __assert_fail ("(CLI.IsTailCall || Result.second.getNode()) && \"Non-null chain expected with non-tail call!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 6520, __PRETTY_FUNCTION__)); | |||
6521 | assert((Result.second.getNode() || !Result.first.getNode()) &&(((Result.second.getNode() || !Result.first.getNode()) && "Null value expected with tail call!") ? static_cast<void > (0) : __assert_fail ("(Result.second.getNode() || !Result.first.getNode()) && \"Null value expected with tail call!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 6522, __PRETTY_FUNCTION__)) | |||
6522 | "Null value expected with tail call!")(((Result.second.getNode() || !Result.first.getNode()) && "Null value expected with tail call!") ? static_cast<void > (0) : __assert_fail ("(Result.second.getNode() || !Result.first.getNode()) && \"Null value expected with tail call!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 6522, __PRETTY_FUNCTION__)); | |||
6523 | ||||
6524 | if (!Result.second.getNode()) { | |||
6525 | // As a special case, a null chain means that a tail call has been emitted | |||
6526 | // and the DAG root is already updated. | |||
6527 | HasTailCall = true; | |||
6528 | ||||
6529 | // Since there's no actual continuation from this block, nothing can be | |||
6530 | // relying on us setting vregs for them. | |||
6531 | PendingExports.clear(); | |||
6532 | } else { | |||
6533 | DAG.setRoot(Result.second); | |||
6534 | } | |||
6535 | ||||
6536 | if (EHPadBB) { | |||
6537 | // Insert a label at the end of the invoke call to mark the try range. This | |||
6538 | // can be used to detect deletion of the invoke via the MachineModuleInfo. | |||
6539 | MCSymbol *EndLabel = MMI.getContext().createTempSymbol(); | |||
6540 | DAG.setRoot(DAG.getEHLabel(getCurSDLoc(), getRoot(), EndLabel)); | |||
6541 | ||||
6542 | // Inform MachineModuleInfo of range. | |||
6543 | auto Pers = classifyEHPersonality(FuncInfo.Fn->getPersonalityFn()); | |||
6544 | // There is a platform (e.g. wasm) that uses funclet style IR but does not | |||
6545 | // actually use outlined funclets and their LSDA info style. | |||
6546 | if (MF.hasEHFunclets() && isFuncletEHPersonality(Pers)) { | |||
6547 | assert(CLI.CS)((CLI.CS) ? static_cast<void> (0) : __assert_fail ("CLI.CS" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 6547, __PRETTY_FUNCTION__)); | |||
6548 | WinEHFuncInfo *EHInfo = DAG.getMachineFunction().getWinEHFuncInfo(); | |||
6549 | EHInfo->addIPToStateRange(cast<InvokeInst>(CLI.CS.getInstruction()), | |||
6550 | BeginLabel, EndLabel); | |||
6551 | } else if (!isScopedEHPersonality(Pers)) { | |||
6552 | MF.addInvoke(FuncInfo.MBBMap[EHPadBB], BeginLabel, EndLabel); | |||
6553 | } | |||
6554 | } | |||
6555 | ||||
6556 | return Result; | |||
6557 | } | |||
6558 | ||||
6559 | void SelectionDAGBuilder::LowerCallTo(ImmutableCallSite CS, SDValue Callee, | |||
6560 | bool isTailCall, | |||
6561 | const BasicBlock *EHPadBB) { | |||
6562 | auto &DL = DAG.getDataLayout(); | |||
6563 | FunctionType *FTy = CS.getFunctionType(); | |||
6564 | Type *RetTy = CS.getType(); | |||
6565 | ||||
6566 | TargetLowering::ArgListTy Args; | |||
6567 | Args.reserve(CS.arg_size()); | |||
6568 | ||||
6569 | const Value *SwiftErrorVal = nullptr; | |||
6570 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
6571 | ||||
6572 | // We can't tail call inside a function with a swifterror argument. Lowering | |||
6573 | // does not support this yet. It would have to move into the swifterror | |||
6574 | // register before the call. | |||
6575 | auto *Caller = CS.getInstruction()->getParent()->getParent(); | |||
6576 | if (TLI.supportSwiftError() && | |||
6577 | Caller->getAttributes().hasAttrSomewhere(Attribute::SwiftError)) | |||
6578 | isTailCall = false; | |||
6579 | ||||
6580 | for (ImmutableCallSite::arg_iterator i = CS.arg_begin(), e = CS.arg_end(); | |||
6581 | i != e; ++i) { | |||
6582 | TargetLowering::ArgListEntry Entry; | |||
6583 | const Value *V = *i; | |||
6584 | ||||
6585 | // Skip empty types | |||
6586 | if (V->getType()->isEmptyTy()) | |||
6587 | continue; | |||
6588 | ||||
6589 | SDValue ArgNode = getValue(V); | |||
6590 | Entry.Node = ArgNode; Entry.Ty = V->getType(); | |||
6591 | ||||
6592 | Entry.setAttributes(&CS, i - CS.arg_begin()); | |||
6593 | ||||
6594 | // Use swifterror virtual register as input to the call. | |||
6595 | if (Entry.IsSwiftError && TLI.supportSwiftError()) { | |||
6596 | SwiftErrorVal = V; | |||
6597 | // We find the virtual register for the actual swifterror argument. | |||
6598 | // Instead of using the Value, we use the virtual register instead. | |||
6599 | Entry.Node = DAG.getRegister(FuncInfo | |||
6600 | .getOrCreateSwiftErrorVRegUseAt( | |||
6601 | CS.getInstruction(), FuncInfo.MBB, V) | |||
6602 | .first, | |||
6603 | EVT(TLI.getPointerTy(DL))); | |||
6604 | } | |||
6605 | ||||
6606 | Args.push_back(Entry); | |||
6607 | ||||
6608 | // If we have an explicit sret argument that is an Instruction, (i.e., it | |||
6609 | // might point to function-local memory), we can't meaningfully tail-call. | |||
6610 | if (Entry.IsSRet && isa<Instruction>(V)) | |||
6611 | isTailCall = false; | |||
6612 | } | |||
6613 | ||||
6614 | // Check if target-independent constraints permit a tail call here. | |||
6615 | // Target-dependent constraints are checked within TLI->LowerCallTo. | |||
6616 | if (isTailCall && !isInTailCallPosition(CS, DAG.getTarget())) | |||
6617 | isTailCall = false; | |||
6618 | ||||
6619 | // Disable tail calls if there is an swifterror argument. Targets have not | |||
6620 | // been updated to support tail calls. | |||
6621 | if (TLI.supportSwiftError() && SwiftErrorVal) | |||
6622 | isTailCall = false; | |||
6623 | ||||
6624 | TargetLowering::CallLoweringInfo CLI(DAG); | |||
6625 | CLI.setDebugLoc(getCurSDLoc()) | |||
6626 | .setChain(getRoot()) | |||
6627 | .setCallee(RetTy, FTy, Callee, std::move(Args), CS) | |||
6628 | .setTailCall(isTailCall) | |||
6629 | .setConvergent(CS.isConvergent()); | |||
6630 | std::pair<SDValue, SDValue> Result = lowerInvokable(CLI, EHPadBB); | |||
6631 | ||||
6632 | if (Result.first.getNode()) { | |||
6633 | const Instruction *Inst = CS.getInstruction(); | |||
6634 | Result.first = lowerRangeToAssertZExt(DAG, *Inst, Result.first); | |||
6635 | setValue(Inst, Result.first); | |||
6636 | } | |||
6637 | ||||
6638 | // The last element of CLI.InVals has the SDValue for swifterror return. | |||
6639 | // Here we copy it to a virtual register and update SwiftErrorMap for | |||
6640 | // book-keeping. | |||
6641 | if (SwiftErrorVal && TLI.supportSwiftError()) { | |||
6642 | // Get the last element of InVals. | |||
6643 | SDValue Src = CLI.InVals.back(); | |||
6644 | unsigned VReg; bool CreatedVReg; | |||
6645 | std::tie(VReg, CreatedVReg) = | |||
6646 | FuncInfo.getOrCreateSwiftErrorVRegDefAt(CS.getInstruction()); | |||
6647 | SDValue CopyNode = CLI.DAG.getCopyToReg(Result.second, CLI.DL, VReg, Src); | |||
6648 | // We update the virtual register for the actual swifterror argument. | |||
6649 | if (CreatedVReg) | |||
6650 | FuncInfo.setCurrentSwiftErrorVReg(FuncInfo.MBB, SwiftErrorVal, VReg); | |||
6651 | DAG.setRoot(CopyNode); | |||
6652 | } | |||
6653 | } | |||
6654 | ||||
6655 | static SDValue getMemCmpLoad(const Value *PtrVal, MVT LoadVT, | |||
6656 | SelectionDAGBuilder &Builder) { | |||
6657 | // Check to see if this load can be trivially constant folded, e.g. if the | |||
6658 | // input is from a string literal. | |||
6659 | if (const Constant *LoadInput = dyn_cast<Constant>(PtrVal)) { | |||
6660 | // Cast pointer to the type we really want to load. | |||
6661 | Type *LoadTy = | |||
6662 | Type::getIntNTy(PtrVal->getContext(), LoadVT.getScalarSizeInBits()); | |||
6663 | if (LoadVT.isVector()) | |||
6664 | LoadTy = VectorType::get(LoadTy, LoadVT.getVectorNumElements()); | |||
6665 | ||||
6666 | LoadInput = ConstantExpr::getBitCast(const_cast<Constant *>(LoadInput), | |||
6667 | PointerType::getUnqual(LoadTy)); | |||
6668 | ||||
6669 | if (const Constant *LoadCst = ConstantFoldLoadFromConstPtr( | |||
6670 | const_cast<Constant *>(LoadInput), LoadTy, *Builder.DL)) | |||
6671 | return Builder.getValue(LoadCst); | |||
6672 | } | |||
6673 | ||||
6674 | // Otherwise, we have to emit the load. If the pointer is to unfoldable but | |||
6675 | // still constant memory, the input chain can be the entry node. | |||
6676 | SDValue Root; | |||
6677 | bool ConstantMemory = false; | |||
6678 | ||||
6679 | // Do not serialize (non-volatile) loads of constant memory with anything. | |||
6680 | if (Builder.AA && Builder.AA->pointsToConstantMemory(PtrVal)) { | |||
6681 | Root = Builder.DAG.getEntryNode(); | |||
6682 | ConstantMemory = true; | |||
6683 | } else { | |||
6684 | // Do not serialize non-volatile loads against each other. | |||
6685 | Root = Builder.DAG.getRoot(); | |||
6686 | } | |||
6687 | ||||
6688 | SDValue Ptr = Builder.getValue(PtrVal); | |||
6689 | SDValue LoadVal = Builder.DAG.getLoad(LoadVT, Builder.getCurSDLoc(), Root, | |||
6690 | Ptr, MachinePointerInfo(PtrVal), | |||
6691 | /* Alignment = */ 1); | |||
6692 | ||||
6693 | if (!ConstantMemory) | |||
6694 | Builder.PendingLoads.push_back(LoadVal.getValue(1)); | |||
6695 | return LoadVal; | |||
6696 | } | |||
6697 | ||||
6698 | /// Record the value for an instruction that produces an integer result, | |||
6699 | /// converting the type where necessary. | |||
6700 | void SelectionDAGBuilder::processIntegerCallValue(const Instruction &I, | |||
6701 | SDValue Value, | |||
6702 | bool IsSigned) { | |||
6703 | EVT VT = DAG.getTargetLoweringInfo().getValueType(DAG.getDataLayout(), | |||
6704 | I.getType(), true); | |||
6705 | if (IsSigned) | |||
6706 | Value = DAG.getSExtOrTrunc(Value, getCurSDLoc(), VT); | |||
6707 | else | |||
6708 | Value = DAG.getZExtOrTrunc(Value, getCurSDLoc(), VT); | |||
6709 | setValue(&I, Value); | |||
6710 | } | |||
6711 | ||||
6712 | /// See if we can lower a memcmp call into an optimized form. If so, return | |||
6713 | /// true and lower it. Otherwise return false, and it will be lowered like a | |||
6714 | /// normal call. | |||
6715 | /// The caller already checked that \p I calls the appropriate LibFunc with a | |||
6716 | /// correct prototype. | |||
6717 | bool SelectionDAGBuilder::visitMemCmpCall(const CallInst &I) { | |||
6718 | const Value *LHS = I.getArgOperand(0), *RHS = I.getArgOperand(1); | |||
6719 | const Value *Size = I.getArgOperand(2); | |||
6720 | const ConstantInt *CSize = dyn_cast<ConstantInt>(Size); | |||
6721 | if (CSize && CSize->getZExtValue() == 0) { | |||
6722 | EVT CallVT = DAG.getTargetLoweringInfo().getValueType(DAG.getDataLayout(), | |||
6723 | I.getType(), true); | |||
6724 | setValue(&I, DAG.getConstant(0, getCurSDLoc(), CallVT)); | |||
6725 | return true; | |||
6726 | } | |||
6727 | ||||
6728 | const SelectionDAGTargetInfo &TSI = DAG.getSelectionDAGInfo(); | |||
6729 | std::pair<SDValue, SDValue> Res = TSI.EmitTargetCodeForMemcmp( | |||
6730 | DAG, getCurSDLoc(), DAG.getRoot(), getValue(LHS), getValue(RHS), | |||
6731 | getValue(Size), MachinePointerInfo(LHS), MachinePointerInfo(RHS)); | |||
6732 | if (Res.first.getNode()) { | |||
6733 | processIntegerCallValue(I, Res.first, true); | |||
6734 | PendingLoads.push_back(Res.second); | |||
6735 | return true; | |||
6736 | } | |||
6737 | ||||
6738 | // memcmp(S1,S2,2) != 0 -> (*(short*)LHS != *(short*)RHS) != 0 | |||
6739 | // memcmp(S1,S2,4) != 0 -> (*(int*)LHS != *(int*)RHS) != 0 | |||
6740 | if (!CSize || !isOnlyUsedInZeroEqualityComparison(&I)) | |||
6741 | return false; | |||
6742 | ||||
6743 | // If the target has a fast compare for the given size, it will return a | |||
6744 | // preferred load type for that size. Require that the load VT is legal and | |||
6745 | // that the target supports unaligned loads of that type. Otherwise, return | |||
6746 | // INVALID. | |||
6747 | auto hasFastLoadsAndCompare = [&](unsigned NumBits) { | |||
6748 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
6749 | MVT LVT = TLI.hasFastEqualityCompare(NumBits); | |||
6750 | if (LVT != MVT::INVALID_SIMPLE_VALUE_TYPE) { | |||
6751 | // TODO: Handle 5 byte compare as 4-byte + 1 byte. | |||
6752 | // TODO: Handle 8 byte compare on x86-32 as two 32-bit loads. | |||
6753 | // TODO: Check alignment of src and dest ptrs. | |||
6754 | unsigned DstAS = LHS->getType()->getPointerAddressSpace(); | |||
6755 | unsigned SrcAS = RHS->getType()->getPointerAddressSpace(); | |||
6756 | if (!TLI.isTypeLegal(LVT) || | |||
6757 | !TLI.allowsMisalignedMemoryAccesses(LVT, SrcAS) || | |||
6758 | !TLI.allowsMisalignedMemoryAccesses(LVT, DstAS)) | |||
6759 | LVT = MVT::INVALID_SIMPLE_VALUE_TYPE; | |||
6760 | } | |||
6761 | ||||
6762 | return LVT; | |||
6763 | }; | |||
6764 | ||||
6765 | // This turns into unaligned loads. We only do this if the target natively | |||
6766 | // supports the MVT we'll be loading or if it is small enough (<= 4) that | |||
6767 | // we'll only produce a small number of byte loads. | |||
6768 | MVT LoadVT; | |||
6769 | unsigned NumBitsToCompare = CSize->getZExtValue() * 8; | |||
6770 | switch (NumBitsToCompare) { | |||
6771 | default: | |||
6772 | return false; | |||
6773 | case 16: | |||
6774 | LoadVT = MVT::i16; | |||
6775 | break; | |||
6776 | case 32: | |||
6777 | LoadVT = MVT::i32; | |||
6778 | break; | |||
6779 | case 64: | |||
6780 | case 128: | |||
6781 | case 256: | |||
6782 | LoadVT = hasFastLoadsAndCompare(NumBitsToCompare); | |||
6783 | break; | |||
6784 | } | |||
6785 | ||||
6786 | if (LoadVT == MVT::INVALID_SIMPLE_VALUE_TYPE) | |||
6787 | return false; | |||
6788 | ||||
6789 | SDValue LoadL = getMemCmpLoad(LHS, LoadVT, *this); | |||
6790 | SDValue LoadR = getMemCmpLoad(RHS, LoadVT, *this); | |||
6791 | ||||
6792 | // Bitcast to a wide integer type if the loads are vectors. | |||
6793 | if (LoadVT.isVector()) { | |||
6794 | EVT CmpVT = EVT::getIntegerVT(LHS->getContext(), LoadVT.getSizeInBits()); | |||
6795 | LoadL = DAG.getBitcast(CmpVT, LoadL); | |||
6796 | LoadR = DAG.getBitcast(CmpVT, LoadR); | |||
6797 | } | |||
6798 | ||||
6799 | SDValue Cmp = DAG.getSetCC(getCurSDLoc(), MVT::i1, LoadL, LoadR, ISD::SETNE); | |||
6800 | processIntegerCallValue(I, Cmp, false); | |||
6801 | return true; | |||
6802 | } | |||
6803 | ||||
6804 | /// See if we can lower a memchr call into an optimized form. If so, return | |||
6805 | /// true and lower it. Otherwise return false, and it will be lowered like a | |||
6806 | /// normal call. | |||
6807 | /// The caller already checked that \p I calls the appropriate LibFunc with a | |||
6808 | /// correct prototype. | |||
6809 | bool SelectionDAGBuilder::visitMemChrCall(const CallInst &I) { | |||
6810 | const Value *Src = I.getArgOperand(0); | |||
6811 | const Value *Char = I.getArgOperand(1); | |||
6812 | const Value *Length = I.getArgOperand(2); | |||
6813 | ||||
6814 | const SelectionDAGTargetInfo &TSI = DAG.getSelectionDAGInfo(); | |||
6815 | std::pair<SDValue, SDValue> Res = | |||
6816 | TSI.EmitTargetCodeForMemchr(DAG, getCurSDLoc(), DAG.getRoot(), | |||
6817 | getValue(Src), getValue(Char), getValue(Length), | |||
6818 | MachinePointerInfo(Src)); | |||
6819 | if (Res.first.getNode()) { | |||
6820 | setValue(&I, Res.first); | |||
6821 | PendingLoads.push_back(Res.second); | |||
6822 | return true; | |||
6823 | } | |||
6824 | ||||
6825 | return false; | |||
6826 | } | |||
6827 | ||||
6828 | /// See if we can lower a mempcpy call into an optimized form. If so, return | |||
6829 | /// true and lower it. Otherwise return false, and it will be lowered like a | |||
6830 | /// normal call. | |||
6831 | /// The caller already checked that \p I calls the appropriate LibFunc with a | |||
6832 | /// correct prototype. | |||
6833 | bool SelectionDAGBuilder::visitMemPCpyCall(const CallInst &I) { | |||
6834 | SDValue Dst = getValue(I.getArgOperand(0)); | |||
6835 | SDValue Src = getValue(I.getArgOperand(1)); | |||
6836 | SDValue Size = getValue(I.getArgOperand(2)); | |||
6837 | ||||
6838 | unsigned DstAlign = DAG.InferPtrAlignment(Dst); | |||
6839 | unsigned SrcAlign = DAG.InferPtrAlignment(Src); | |||
6840 | unsigned Align = std::min(DstAlign, SrcAlign); | |||
6841 | if (Align == 0) // Alignment of one or both could not be inferred. | |||
6842 | Align = 1; // 0 and 1 both specify no alignment, but 0 is reserved. | |||
6843 | ||||
6844 | bool isVol = false; | |||
6845 | SDLoc sdl = getCurSDLoc(); | |||
6846 | ||||
6847 | // In the mempcpy context we need to pass in a false value for isTailCall | |||
6848 | // because the return pointer needs to be adjusted by the size of | |||
6849 | // the copied memory. | |||
6850 | SDValue MC = DAG.getMemcpy(getRoot(), sdl, Dst, Src, Size, Align, isVol, | |||
6851 | false, /*isTailCall=*/false, | |||
6852 | MachinePointerInfo(I.getArgOperand(0)), | |||
6853 | MachinePointerInfo(I.getArgOperand(1))); | |||
6854 | assert(MC.getNode() != nullptr &&((MC.getNode() != nullptr && "** memcpy should not be lowered as TailCall in mempcpy context **" ) ? static_cast<void> (0) : __assert_fail ("MC.getNode() != nullptr && \"** memcpy should not be lowered as TailCall in mempcpy context **\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 6855, __PRETTY_FUNCTION__)) | |||
6855 | "** memcpy should not be lowered as TailCall in mempcpy context **")((MC.getNode() != nullptr && "** memcpy should not be lowered as TailCall in mempcpy context **" ) ? static_cast<void> (0) : __assert_fail ("MC.getNode() != nullptr && \"** memcpy should not be lowered as TailCall in mempcpy context **\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 6855, __PRETTY_FUNCTION__)); | |||
6856 | DAG.setRoot(MC); | |||
6857 | ||||
6858 | // Check if Size needs to be truncated or extended. | |||
6859 | Size = DAG.getSExtOrTrunc(Size, sdl, Dst.getValueType()); | |||
6860 | ||||
6861 | // Adjust return pointer to point just past the last dst byte. | |||
6862 | SDValue DstPlusSize = DAG.getNode(ISD::ADD, sdl, Dst.getValueType(), | |||
6863 | Dst, Size); | |||
6864 | setValue(&I, DstPlusSize); | |||
6865 | return true; | |||
6866 | } | |||
6867 | ||||
6868 | /// See if we can lower a strcpy call into an optimized form. If so, return | |||
6869 | /// true and lower it, otherwise return false and it will be lowered like a | |||
6870 | /// normal call. | |||
6871 | /// The caller already checked that \p I calls the appropriate LibFunc with a | |||
6872 | /// correct prototype. | |||
6873 | bool SelectionDAGBuilder::visitStrCpyCall(const CallInst &I, bool isStpcpy) { | |||
6874 | const Value *Arg0 = I.getArgOperand(0), *Arg1 = I.getArgOperand(1); | |||
6875 | ||||
6876 | const SelectionDAGTargetInfo &TSI = DAG.getSelectionDAGInfo(); | |||
6877 | std::pair<SDValue, SDValue> Res = | |||
6878 | TSI.EmitTargetCodeForStrcpy(DAG, getCurSDLoc(), getRoot(), | |||
6879 | getValue(Arg0), getValue(Arg1), | |||
6880 | MachinePointerInfo(Arg0), | |||
6881 | MachinePointerInfo(Arg1), isStpcpy); | |||
6882 | if (Res.first.getNode()) { | |||
6883 | setValue(&I, Res.first); | |||
6884 | DAG.setRoot(Res.second); | |||
6885 | return true; | |||
6886 | } | |||
6887 | ||||
6888 | return false; | |||
6889 | } | |||
6890 | ||||
6891 | /// See if we can lower a strcmp call into an optimized form. If so, return | |||
6892 | /// true and lower it, otherwise return false and it will be lowered like a | |||
6893 | /// normal call. | |||
6894 | /// The caller already checked that \p I calls the appropriate LibFunc with a | |||
6895 | /// correct prototype. | |||
6896 | bool SelectionDAGBuilder::visitStrCmpCall(const CallInst &I) { | |||
6897 | const Value *Arg0 = I.getArgOperand(0), *Arg1 = I.getArgOperand(1); | |||
6898 | ||||
6899 | const SelectionDAGTargetInfo &TSI = DAG.getSelectionDAGInfo(); | |||
6900 | std::pair<SDValue, SDValue> Res = | |||
6901 | TSI.EmitTargetCodeForStrcmp(DAG, getCurSDLoc(), DAG.getRoot(), | |||
6902 | getValue(Arg0), getValue(Arg1), | |||
6903 | MachinePointerInfo(Arg0), | |||
6904 | MachinePointerInfo(Arg1)); | |||
6905 | if (Res.first.getNode()) { | |||
6906 | processIntegerCallValue(I, Res.first, true); | |||
6907 | PendingLoads.push_back(Res.second); | |||
6908 | return true; | |||
6909 | } | |||
6910 | ||||
6911 | return false; | |||
6912 | } | |||
6913 | ||||
6914 | /// See if we can lower a strlen call into an optimized form. If so, return | |||
6915 | /// true and lower it, otherwise return false and it will be lowered like a | |||
6916 | /// normal call. | |||
6917 | /// The caller already checked that \p I calls the appropriate LibFunc with a | |||
6918 | /// correct prototype. | |||
6919 | bool SelectionDAGBuilder::visitStrLenCall(const CallInst &I) { | |||
6920 | const Value *Arg0 = I.getArgOperand(0); | |||
6921 | ||||
6922 | const SelectionDAGTargetInfo &TSI = DAG.getSelectionDAGInfo(); | |||
6923 | std::pair<SDValue, SDValue> Res = | |||
6924 | TSI.EmitTargetCodeForStrlen(DAG, getCurSDLoc(), DAG.getRoot(), | |||
6925 | getValue(Arg0), MachinePointerInfo(Arg0)); | |||
6926 | if (Res.first.getNode()) { | |||
6927 | processIntegerCallValue(I, Res.first, false); | |||
6928 | PendingLoads.push_back(Res.second); | |||
6929 | return true; | |||
6930 | } | |||
6931 | ||||
6932 | return false; | |||
6933 | } | |||
6934 | ||||
6935 | /// See if we can lower a strnlen call into an optimized form. If so, return | |||
6936 | /// true and lower it, otherwise return false and it will be lowered like a | |||
6937 | /// normal call. | |||
6938 | /// The caller already checked that \p I calls the appropriate LibFunc with a | |||
6939 | /// correct prototype. | |||
6940 | bool SelectionDAGBuilder::visitStrNLenCall(const CallInst &I) { | |||
6941 | const Value *Arg0 = I.getArgOperand(0), *Arg1 = I.getArgOperand(1); | |||
6942 | ||||
6943 | const SelectionDAGTargetInfo &TSI = DAG.getSelectionDAGInfo(); | |||
6944 | std::pair<SDValue, SDValue> Res = | |||
6945 | TSI.EmitTargetCodeForStrnlen(DAG, getCurSDLoc(), DAG.getRoot(), | |||
6946 | getValue(Arg0), getValue(Arg1), | |||
6947 | MachinePointerInfo(Arg0)); | |||
6948 | if (Res.first.getNode()) { | |||
6949 | processIntegerCallValue(I, Res.first, false); | |||
6950 | PendingLoads.push_back(Res.second); | |||
6951 | return true; | |||
6952 | } | |||
6953 | ||||
6954 | return false; | |||
6955 | } | |||
6956 | ||||
6957 | /// See if we can lower a unary floating-point operation into an SDNode with | |||
6958 | /// the specified Opcode. If so, return true and lower it, otherwise return | |||
6959 | /// false and it will be lowered like a normal call. | |||
6960 | /// The caller already checked that \p I calls the appropriate LibFunc with a | |||
6961 | /// correct prototype. | |||
6962 | bool SelectionDAGBuilder::visitUnaryFloatCall(const CallInst &I, | |||
6963 | unsigned Opcode) { | |||
6964 | // We already checked this call's prototype; verify it doesn't modify errno. | |||
6965 | if (!I.onlyReadsMemory()) | |||
6966 | return false; | |||
6967 | ||||
6968 | SDValue Tmp = getValue(I.getArgOperand(0)); | |||
6969 | setValue(&I, DAG.getNode(Opcode, getCurSDLoc(), Tmp.getValueType(), Tmp)); | |||
6970 | return true; | |||
6971 | } | |||
6972 | ||||
6973 | /// See if we can lower a binary floating-point operation into an SDNode with | |||
6974 | /// the specified Opcode. If so, return true and lower it. Otherwise return | |||
6975 | /// false, and it will be lowered like a normal call. | |||
6976 | /// The caller already checked that \p I calls the appropriate LibFunc with a | |||
6977 | /// correct prototype. | |||
6978 | bool SelectionDAGBuilder::visitBinaryFloatCall(const CallInst &I, | |||
6979 | unsigned Opcode) { | |||
6980 | // We already checked this call's prototype; verify it doesn't modify errno. | |||
6981 | if (!I.onlyReadsMemory()) | |||
6982 | return false; | |||
6983 | ||||
6984 | SDValue Tmp0 = getValue(I.getArgOperand(0)); | |||
6985 | SDValue Tmp1 = getValue(I.getArgOperand(1)); | |||
6986 | EVT VT = Tmp0.getValueType(); | |||
6987 | setValue(&I, DAG.getNode(Opcode, getCurSDLoc(), VT, Tmp0, Tmp1)); | |||
6988 | return true; | |||
6989 | } | |||
6990 | ||||
6991 | void SelectionDAGBuilder::visitCall(const CallInst &I) { | |||
6992 | // Handle inline assembly differently. | |||
6993 | if (isa<InlineAsm>(I.getCalledValue())) { | |||
6994 | visitInlineAsm(&I); | |||
6995 | return; | |||
6996 | } | |||
6997 | ||||
6998 | MachineModuleInfo &MMI = DAG.getMachineFunction().getMMI(); | |||
6999 | computeUsesVAFloatArgument(I, MMI); | |||
7000 | ||||
7001 | const char *RenameFn = nullptr; | |||
7002 | if (Function *F = I.getCalledFunction()) { | |||
7003 | if (F->isDeclaration()) { | |||
7004 | // Is this an LLVM intrinsic or a target-specific intrinsic? | |||
7005 | unsigned IID = F->getIntrinsicID(); | |||
7006 | if (!IID) | |||
7007 | if (const TargetIntrinsicInfo *II = TM.getIntrinsicInfo()) | |||
7008 | IID = II->getIntrinsicID(F); | |||
7009 | ||||
7010 | if (IID) { | |||
7011 | RenameFn = visitIntrinsicCall(I, IID); | |||
7012 | if (!RenameFn) | |||
7013 | return; | |||
7014 | } | |||
7015 | } | |||
7016 | ||||
7017 | // Check for well-known libc/libm calls. If the function is internal, it | |||
7018 | // can't be a library call. Don't do the check if marked as nobuiltin for | |||
7019 | // some reason or the call site requires strict floating point semantics. | |||
7020 | LibFunc Func; | |||
7021 | if (!I.isNoBuiltin() && !I.isStrictFP() && !F->hasLocalLinkage() && | |||
7022 | F->hasName() && LibInfo->getLibFunc(*F, Func) && | |||
7023 | LibInfo->hasOptimizedCodeGen(Func)) { | |||
7024 | switch (Func) { | |||
7025 | default: break; | |||
7026 | case LibFunc_copysign: | |||
7027 | case LibFunc_copysignf: | |||
7028 | case LibFunc_copysignl: | |||
7029 | // We already checked this call's prototype; verify it doesn't modify | |||
7030 | // errno. | |||
7031 | if (I.onlyReadsMemory()) { | |||
7032 | SDValue LHS = getValue(I.getArgOperand(0)); | |||
7033 | SDValue RHS = getValue(I.getArgOperand(1)); | |||
7034 | setValue(&I, DAG.getNode(ISD::FCOPYSIGN, getCurSDLoc(), | |||
7035 | LHS.getValueType(), LHS, RHS)); | |||
7036 | return; | |||
7037 | } | |||
7038 | break; | |||
7039 | case LibFunc_fabs: | |||
7040 | case LibFunc_fabsf: | |||
7041 | case LibFunc_fabsl: | |||
7042 | if (visitUnaryFloatCall(I, ISD::FABS)) | |||
7043 | return; | |||
7044 | break; | |||
7045 | case LibFunc_fmin: | |||
7046 | case LibFunc_fminf: | |||
7047 | case LibFunc_fminl: | |||
7048 | if (visitBinaryFloatCall(I, ISD::FMINNUM)) | |||
7049 | return; | |||
7050 | break; | |||
7051 | case LibFunc_fmax: | |||
7052 | case LibFunc_fmaxf: | |||
7053 | case LibFunc_fmaxl: | |||
7054 | if (visitBinaryFloatCall(I, ISD::FMAXNUM)) | |||
7055 | return; | |||
7056 | break; | |||
7057 | case LibFunc_sin: | |||
7058 | case LibFunc_sinf: | |||
7059 | case LibFunc_sinl: | |||
7060 | if (visitUnaryFloatCall(I, ISD::FSIN)) | |||
7061 | return; | |||
7062 | break; | |||
7063 | case LibFunc_cos: | |||
7064 | case LibFunc_cosf: | |||
7065 | case LibFunc_cosl: | |||
7066 | if (visitUnaryFloatCall(I, ISD::FCOS)) | |||
7067 | return; | |||
7068 | break; | |||
7069 | case LibFunc_sqrt: | |||
7070 | case LibFunc_sqrtf: | |||
7071 | case LibFunc_sqrtl: | |||
7072 | case LibFunc_sqrt_finite: | |||
7073 | case LibFunc_sqrtf_finite: | |||
7074 | case LibFunc_sqrtl_finite: | |||
7075 | if (visitUnaryFloatCall(I, ISD::FSQRT)) | |||
7076 | return; | |||
7077 | break; | |||
7078 | case LibFunc_floor: | |||
7079 | case LibFunc_floorf: | |||
7080 | case LibFunc_floorl: | |||
7081 | if (visitUnaryFloatCall(I, ISD::FFLOOR)) | |||
7082 | return; | |||
7083 | break; | |||
7084 | case LibFunc_nearbyint: | |||
7085 | case LibFunc_nearbyintf: | |||
7086 | case LibFunc_nearbyintl: | |||
7087 | if (visitUnaryFloatCall(I, ISD::FNEARBYINT)) | |||
7088 | return; | |||
7089 | break; | |||
7090 | case LibFunc_ceil: | |||
7091 | case LibFunc_ceilf: | |||
7092 | case LibFunc_ceill: | |||
7093 | if (visitUnaryFloatCall(I, ISD::FCEIL)) | |||
7094 | return; | |||
7095 | break; | |||
7096 | case LibFunc_rint: | |||
7097 | case LibFunc_rintf: | |||
7098 | case LibFunc_rintl: | |||
7099 | if (visitUnaryFloatCall(I, ISD::FRINT)) | |||
7100 | return; | |||
7101 | break; | |||
7102 | case LibFunc_round: | |||
7103 | case LibFunc_roundf: | |||
7104 | case LibFunc_roundl: | |||
7105 | if (visitUnaryFloatCall(I, ISD::FROUND)) | |||
7106 | return; | |||
7107 | break; | |||
7108 | case LibFunc_trunc: | |||
7109 | case LibFunc_truncf: | |||
7110 | case LibFunc_truncl: | |||
7111 | if (visitUnaryFloatCall(I, ISD::FTRUNC)) | |||
7112 | return; | |||
7113 | break; | |||
7114 | case LibFunc_log2: | |||
7115 | case LibFunc_log2f: | |||
7116 | case LibFunc_log2l: | |||
7117 | if (visitUnaryFloatCall(I, ISD::FLOG2)) | |||
7118 | return; | |||
7119 | break; | |||
7120 | case LibFunc_exp2: | |||
7121 | case LibFunc_exp2f: | |||
7122 | case LibFunc_exp2l: | |||
7123 | if (visitUnaryFloatCall(I, ISD::FEXP2)) | |||
7124 | return; | |||
7125 | break; | |||
7126 | case LibFunc_memcmp: | |||
7127 | if (visitMemCmpCall(I)) | |||
7128 | return; | |||
7129 | break; | |||
7130 | case LibFunc_mempcpy: | |||
7131 | if (visitMemPCpyCall(I)) | |||
7132 | return; | |||
7133 | break; | |||
7134 | case LibFunc_memchr: | |||
7135 | if (visitMemChrCall(I)) | |||
7136 | return; | |||
7137 | break; | |||
7138 | case LibFunc_strcpy: | |||
7139 | if (visitStrCpyCall(I, false)) | |||
7140 | return; | |||
7141 | break; | |||
7142 | case LibFunc_stpcpy: | |||
7143 | if (visitStrCpyCall(I, true)) | |||
7144 | return; | |||
7145 | break; | |||
7146 | case LibFunc_strcmp: | |||
7147 | if (visitStrCmpCall(I)) | |||
7148 | return; | |||
7149 | break; | |||
7150 | case LibFunc_strlen: | |||
7151 | if (visitStrLenCall(I)) | |||
7152 | return; | |||
7153 | break; | |||
7154 | case LibFunc_strnlen: | |||
7155 | if (visitStrNLenCall(I)) | |||
7156 | return; | |||
7157 | break; | |||
7158 | } | |||
7159 | } | |||
7160 | } | |||
7161 | ||||
7162 | SDValue Callee; | |||
7163 | if (!RenameFn) | |||
7164 | Callee = getValue(I.getCalledValue()); | |||
7165 | else | |||
7166 | Callee = DAG.getExternalSymbol( | |||
7167 | RenameFn, | |||
7168 | DAG.getTargetLoweringInfo().getPointerTy(DAG.getDataLayout())); | |||
7169 | ||||
7170 | // Deopt bundles are lowered in LowerCallSiteWithDeoptBundle, and we don't | |||
7171 | // have to do anything here to lower funclet bundles. | |||
7172 | assert(!I.hasOperandBundlesOtherThan(((!I.hasOperandBundlesOtherThan( {LLVMContext::OB_deopt, LLVMContext ::OB_funclet}) && "Cannot lower calls with arbitrary operand bundles!" ) ? static_cast<void> (0) : __assert_fail ("!I.hasOperandBundlesOtherThan( {LLVMContext::OB_deopt, LLVMContext::OB_funclet}) && \"Cannot lower calls with arbitrary operand bundles!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 7174, __PRETTY_FUNCTION__)) | |||
7173 | {LLVMContext::OB_deopt, LLVMContext::OB_funclet}) &&((!I.hasOperandBundlesOtherThan( {LLVMContext::OB_deopt, LLVMContext ::OB_funclet}) && "Cannot lower calls with arbitrary operand bundles!" ) ? static_cast<void> (0) : __assert_fail ("!I.hasOperandBundlesOtherThan( {LLVMContext::OB_deopt, LLVMContext::OB_funclet}) && \"Cannot lower calls with arbitrary operand bundles!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 7174, __PRETTY_FUNCTION__)) | |||
7174 | "Cannot lower calls with arbitrary operand bundles!")((!I.hasOperandBundlesOtherThan( {LLVMContext::OB_deopt, LLVMContext ::OB_funclet}) && "Cannot lower calls with arbitrary operand bundles!" ) ? static_cast<void> (0) : __assert_fail ("!I.hasOperandBundlesOtherThan( {LLVMContext::OB_deopt, LLVMContext::OB_funclet}) && \"Cannot lower calls with arbitrary operand bundles!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 7174, __PRETTY_FUNCTION__)); | |||
7175 | ||||
7176 | if (I.countOperandBundlesOfType(LLVMContext::OB_deopt)) | |||
7177 | LowerCallSiteWithDeoptBundle(&I, Callee, nullptr); | |||
7178 | else | |||
7179 | // Check if we can potentially perform a tail call. More detailed checking | |||
7180 | // is be done within LowerCallTo, after more information about the call is | |||
7181 | // known. | |||
7182 | LowerCallTo(&I, Callee, I.isTailCall()); | |||
7183 | } | |||
7184 | ||||
7185 | namespace { | |||
7186 | ||||
7187 | /// AsmOperandInfo - This contains information for each constraint that we are | |||
7188 | /// lowering. | |||
7189 | class SDISelAsmOperandInfo : public TargetLowering::AsmOperandInfo { | |||
7190 | public: | |||
7191 | /// CallOperand - If this is the result output operand or a clobber | |||
7192 | /// this is null, otherwise it is the incoming operand to the CallInst. | |||
7193 | /// This gets modified as the asm is processed. | |||
7194 | SDValue CallOperand; | |||
7195 | ||||
7196 | /// AssignedRegs - If this is a register or register class operand, this | |||
7197 | /// contains the set of register corresponding to the operand. | |||
7198 | RegsForValue AssignedRegs; | |||
7199 | ||||
7200 | explicit SDISelAsmOperandInfo(const TargetLowering::AsmOperandInfo &info) | |||
7201 | : TargetLowering::AsmOperandInfo(info), CallOperand(nullptr, 0) { | |||
7202 | } | |||
7203 | ||||
7204 | /// Whether or not this operand accesses memory | |||
7205 | bool hasMemory(const TargetLowering &TLI) const { | |||
7206 | // Indirect operand accesses access memory. | |||
7207 | if (isIndirect) | |||
7208 | return true; | |||
7209 | ||||
7210 | for (const auto &Code : Codes) | |||
7211 | if (TLI.getConstraintType(Code) == TargetLowering::C_Memory) | |||
7212 | return true; | |||
7213 | ||||
7214 | return false; | |||
7215 | } | |||
7216 | ||||
7217 | /// getCallOperandValEVT - Return the EVT of the Value* that this operand | |||
7218 | /// corresponds to. If there is no Value* for this operand, it returns | |||
7219 | /// MVT::Other. | |||
7220 | EVT getCallOperandValEVT(LLVMContext &Context, const TargetLowering &TLI, | |||
7221 | const DataLayout &DL) const { | |||
7222 | if (!CallOperandVal) return MVT::Other; | |||
7223 | ||||
7224 | if (isa<BasicBlock>(CallOperandVal)) | |||
7225 | return TLI.getPointerTy(DL); | |||
7226 | ||||
7227 | llvm::Type *OpTy = CallOperandVal->getType(); | |||
7228 | ||||
7229 | // FIXME: code duplicated from TargetLowering::ParseConstraints(). | |||
7230 | // If this is an indirect operand, the operand is a pointer to the | |||
7231 | // accessed type. | |||
7232 | if (isIndirect) { | |||
7233 | PointerType *PtrTy = dyn_cast<PointerType>(OpTy); | |||
7234 | if (!PtrTy) | |||
7235 | report_fatal_error("Indirect operand for inline asm not a pointer!"); | |||
7236 | OpTy = PtrTy->getElementType(); | |||
7237 | } | |||
7238 | ||||
7239 | // Look for vector wrapped in a struct. e.g. { <16 x i8> }. | |||
7240 | if (StructType *STy = dyn_cast<StructType>(OpTy)) | |||
7241 | if (STy->getNumElements() == 1) | |||
7242 | OpTy = STy->getElementType(0); | |||
7243 | ||||
7244 | // If OpTy is not a single value, it may be a struct/union that we | |||
7245 | // can tile with integers. | |||
7246 | if (!OpTy->isSingleValueType() && OpTy->isSized()) { | |||
7247 | unsigned BitSize = DL.getTypeSizeInBits(OpTy); | |||
7248 | switch (BitSize) { | |||
7249 | default: break; | |||
7250 | case 1: | |||
7251 | case 8: | |||
7252 | case 16: | |||
7253 | case 32: | |||
7254 | case 64: | |||
7255 | case 128: | |||
7256 | OpTy = IntegerType::get(Context, BitSize); | |||
7257 | break; | |||
7258 | } | |||
7259 | } | |||
7260 | ||||
7261 | return TLI.getValueType(DL, OpTy, true); | |||
7262 | } | |||
7263 | }; | |||
7264 | ||||
7265 | using SDISelAsmOperandInfoVector = SmallVector<SDISelAsmOperandInfo, 16>; | |||
7266 | ||||
7267 | } // end anonymous namespace | |||
7268 | ||||
7269 | /// Make sure that the output operand \p OpInfo and its corresponding input | |||
7270 | /// operand \p MatchingOpInfo have compatible constraint types (otherwise error | |||
7271 | /// out). | |||
7272 | static void patchMatchingInput(const SDISelAsmOperandInfo &OpInfo, | |||
7273 | SDISelAsmOperandInfo &MatchingOpInfo, | |||
7274 | SelectionDAG &DAG) { | |||
7275 | if (OpInfo.ConstraintVT == MatchingOpInfo.ConstraintVT) | |||
7276 | return; | |||
7277 | ||||
7278 | const TargetRegisterInfo *TRI = DAG.getSubtarget().getRegisterInfo(); | |||
7279 | const auto &TLI = DAG.getTargetLoweringInfo(); | |||
7280 | ||||
7281 | std::pair<unsigned, const TargetRegisterClass *> MatchRC = | |||
7282 | TLI.getRegForInlineAsmConstraint(TRI, OpInfo.ConstraintCode, | |||
7283 | OpInfo.ConstraintVT); | |||
7284 | std::pair<unsigned, const TargetRegisterClass *> InputRC = | |||
7285 | TLI.getRegForInlineAsmConstraint(TRI, MatchingOpInfo.ConstraintCode, | |||
7286 | MatchingOpInfo.ConstraintVT); | |||
7287 | if ((OpInfo.ConstraintVT.isInteger() != | |||
7288 | MatchingOpInfo.ConstraintVT.isInteger()) || | |||
7289 | (MatchRC.second != InputRC.second)) { | |||
7290 | // FIXME: error out in a more elegant fashion | |||
7291 | report_fatal_error("Unsupported asm: input constraint" | |||
7292 | " with a matching output constraint of" | |||
7293 | " incompatible type!"); | |||
7294 | } | |||
7295 | MatchingOpInfo.ConstraintVT = OpInfo.ConstraintVT; | |||
7296 | } | |||
7297 | ||||
7298 | /// Get a direct memory input to behave well as an indirect operand. | |||
7299 | /// This may introduce stores, hence the need for a \p Chain. | |||
7300 | /// \return The (possibly updated) chain. | |||
7301 | static SDValue getAddressForMemoryInput(SDValue Chain, const SDLoc &Location, | |||
7302 | SDISelAsmOperandInfo &OpInfo, | |||
7303 | SelectionDAG &DAG) { | |||
7304 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
7305 | ||||
7306 | // If we don't have an indirect input, put it in the constpool if we can, | |||
7307 | // otherwise spill it to a stack slot. | |||
7308 | // TODO: This isn't quite right. We need to handle these according to | |||
7309 | // the addressing mode that the constraint wants. Also, this may take | |||
7310 | // an additional register for the computation and we don't want that | |||
7311 | // either. | |||
7312 | ||||
7313 | // If the operand is a float, integer, or vector constant, spill to a | |||
7314 | // constant pool entry to get its address. | |||
7315 | const Value *OpVal = OpInfo.CallOperandVal; | |||
7316 | if (isa<ConstantFP>(OpVal) || isa<ConstantInt>(OpVal) || | |||
7317 | isa<ConstantVector>(OpVal) || isa<ConstantDataVector>(OpVal)) { | |||
7318 | OpInfo.CallOperand = DAG.getConstantPool( | |||
7319 | cast<Constant>(OpVal), TLI.getPointerTy(DAG.getDataLayout())); | |||
7320 | return Chain; | |||
7321 | } | |||
7322 | ||||
7323 | // Otherwise, create a stack slot and emit a store to it before the asm. | |||
7324 | Type *Ty = OpVal->getType(); | |||
7325 | auto &DL = DAG.getDataLayout(); | |||
7326 | uint64_t TySize = DL.getTypeAllocSize(Ty); | |||
7327 | unsigned Align = DL.getPrefTypeAlignment(Ty); | |||
7328 | MachineFunction &MF = DAG.getMachineFunction(); | |||
7329 | int SSFI = MF.getFrameInfo().CreateStackObject(TySize, Align, false); | |||
7330 | SDValue StackSlot = DAG.getFrameIndex(SSFI, TLI.getFrameIndexTy(DL)); | |||
7331 | Chain = DAG.getStore(Chain, Location, OpInfo.CallOperand, StackSlot, | |||
7332 | MachinePointerInfo::getFixedStack(MF, SSFI)); | |||
7333 | OpInfo.CallOperand = StackSlot; | |||
7334 | ||||
7335 | return Chain; | |||
7336 | } | |||
7337 | ||||
7338 | /// GetRegistersForValue - Assign registers (virtual or physical) for the | |||
7339 | /// specified operand. We prefer to assign virtual registers, to allow the | |||
7340 | /// register allocator to handle the assignment process. However, if the asm | |||
7341 | /// uses features that we can't model on machineinstrs, we have SDISel do the | |||
7342 | /// allocation. This produces generally horrible, but correct, code. | |||
7343 | /// | |||
7344 | /// OpInfo describes the operand | |||
7345 | /// RefOpInfo describes the matching operand if any, the operand otherwise | |||
7346 | static void GetRegistersForValue(SelectionDAG &DAG, const TargetLowering &TLI, | |||
7347 | const SDLoc &DL, SDISelAsmOperandInfo &OpInfo, | |||
7348 | SDISelAsmOperandInfo &RefOpInfo) { | |||
7349 | LLVMContext &Context = *DAG.getContext(); | |||
7350 | ||||
7351 | MachineFunction &MF = DAG.getMachineFunction(); | |||
7352 | SmallVector<unsigned, 4> Regs; | |||
7353 | const TargetRegisterInfo &TRI = *MF.getSubtarget().getRegisterInfo(); | |||
7354 | ||||
7355 | // If this is a constraint for a single physreg, or a constraint for a | |||
7356 | // register class, find it. | |||
7357 | std::pair<unsigned, const TargetRegisterClass *> PhysReg = | |||
7358 | TLI.getRegForInlineAsmConstraint(&TRI, RefOpInfo.ConstraintCode, | |||
7359 | RefOpInfo.ConstraintVT); | |||
7360 | ||||
7361 | unsigned NumRegs = 1; | |||
7362 | if (OpInfo.ConstraintVT != MVT::Other) { | |||
7363 | // If this is an FP operand in an integer register (or visa versa), or more | |||
7364 | // generally if the operand value disagrees with the register class we plan | |||
7365 | // to stick it in, fix the operand type. | |||
7366 | // | |||
7367 | // If this is an input value, the bitcast to the new type is done now. | |||
7368 | // Bitcast for output value is done at the end of visitInlineAsm(). | |||
7369 | if ((OpInfo.Type == InlineAsm::isOutput || | |||
7370 | OpInfo.Type == InlineAsm::isInput) && | |||
7371 | PhysReg.second && | |||
7372 | !TRI.isTypeLegalForClass(*PhysReg.second, OpInfo.ConstraintVT)) { | |||
7373 | // Try to convert to the first EVT that the reg class contains. If the | |||
7374 | // types are identical size, use a bitcast to convert (e.g. two differing | |||
7375 | // vector types). Note: output bitcast is done at the end of | |||
7376 | // visitInlineAsm(). | |||
7377 | MVT RegVT = *TRI.legalclasstypes_begin(*PhysReg.second); | |||
7378 | if (RegVT.getSizeInBits() == OpInfo.ConstraintVT.getSizeInBits()) { | |||
7379 | // Exclude indirect inputs while they are unsupported because the code | |||
7380 | // to perform the load is missing and thus OpInfo.CallOperand still | |||
7381 | // refers to the input address rather than the pointed-to value. | |||
7382 | if (OpInfo.Type == InlineAsm::isInput && !OpInfo.isIndirect) | |||
7383 | OpInfo.CallOperand = | |||
7384 | DAG.getNode(ISD::BITCAST, DL, RegVT, OpInfo.CallOperand); | |||
7385 | OpInfo.ConstraintVT = RegVT; | |||
7386 | // If the operand is an FP value and we want it in integer registers, | |||
7387 | // use the corresponding integer type. This turns an f64 value into | |||
7388 | // i64, which can be passed with two i32 values on a 32-bit machine. | |||
7389 | } else if (RegVT.isInteger() && OpInfo.ConstraintVT.isFloatingPoint()) { | |||
7390 | RegVT = MVT::getIntegerVT(OpInfo.ConstraintVT.getSizeInBits()); | |||
7391 | if (OpInfo.Type == InlineAsm::isInput) | |||
7392 | OpInfo.CallOperand = | |||
7393 | DAG.getNode(ISD::BITCAST, DL, RegVT, OpInfo.CallOperand); | |||
7394 | OpInfo.ConstraintVT = RegVT; | |||
7395 | } | |||
7396 | } | |||
7397 | ||||
7398 | NumRegs = TLI.getNumRegisters(Context, OpInfo.ConstraintVT); | |||
7399 | } | |||
7400 | ||||
7401 | // No need to allocate a matching input constraint since the constraint it's | |||
7402 | // matching to has already been allocated. | |||
7403 | if (OpInfo.isMatchingInputConstraint()) | |||
7404 | return; | |||
7405 | ||||
7406 | MVT RegVT; | |||
7407 | EVT ValueVT = OpInfo.ConstraintVT; | |||
7408 | ||||
7409 | // If this is a constraint for a specific physical register, like {r17}, | |||
7410 | // assign it now. | |||
7411 | if (unsigned AssignedReg = PhysReg.first) { | |||
7412 | const TargetRegisterClass *RC = PhysReg.second; | |||
7413 | if (OpInfo.ConstraintVT == MVT::Other) | |||
7414 | ValueVT = *TRI.legalclasstypes_begin(*RC); | |||
7415 | ||||
7416 | // Get the actual register value type. This is important, because the user | |||
7417 | // may have asked for (e.g.) the AX register in i32 type. We need to | |||
7418 | // remember that AX is actually i16 to get the right extension. | |||
7419 | RegVT = *TRI.legalclasstypes_begin(*RC); | |||
| ||||
7420 | ||||
7421 | // This is an explicit reference to a physical register. | |||
7422 | Regs.push_back(AssignedReg); | |||
7423 | ||||
7424 | // If this is an expanded reference, add the rest of the regs to Regs. | |||
7425 | if (NumRegs != 1) { | |||
7426 | TargetRegisterClass::iterator I = RC->begin(); | |||
7427 | for (; *I != AssignedReg; ++I) | |||
7428 | assert(I != RC->end() && "Didn't find reg!")((I != RC->end() && "Didn't find reg!") ? static_cast <void> (0) : __assert_fail ("I != RC->end() && \"Didn't find reg!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 7428, __PRETTY_FUNCTION__)); | |||
7429 | ||||
7430 | // Already added the first reg. | |||
7431 | --NumRegs; ++I; | |||
7432 | for (; NumRegs; --NumRegs, ++I) { | |||
7433 | assert(I != RC->end() && "Ran out of registers to allocate!")((I != RC->end() && "Ran out of registers to allocate!" ) ? static_cast<void> (0) : __assert_fail ("I != RC->end() && \"Ran out of registers to allocate!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 7433, __PRETTY_FUNCTION__)); | |||
7434 | Regs.push_back(*I); | |||
7435 | } | |||
7436 | } | |||
7437 | ||||
7438 | OpInfo.AssignedRegs = RegsForValue(Regs, RegVT, ValueVT); | |||
7439 | return; | |||
7440 | } | |||
7441 | ||||
7442 | // Otherwise, if this was a reference to an LLVM register class, create vregs | |||
7443 | // for this reference. | |||
7444 | if (const TargetRegisterClass *RC = PhysReg.second) { | |||
7445 | RegVT = *TRI.legalclasstypes_begin(*RC); | |||
7446 | if (OpInfo.ConstraintVT == MVT::Other) | |||
7447 | ValueVT = RegVT; | |||
7448 | ||||
7449 | // Create the appropriate number of virtual registers. | |||
7450 | MachineRegisterInfo &RegInfo = MF.getRegInfo(); | |||
7451 | for (; NumRegs; --NumRegs) | |||
7452 | Regs.push_back(RegInfo.createVirtualRegister(RC)); | |||
7453 | ||||
7454 | OpInfo.AssignedRegs = RegsForValue(Regs, RegVT, ValueVT); | |||
7455 | return; | |||
7456 | } | |||
7457 | ||||
7458 | // Otherwise, we couldn't allocate enough registers for this. | |||
7459 | } | |||
7460 | ||||
7461 | static unsigned | |||
7462 | findMatchingInlineAsmOperand(unsigned OperandNo, | |||
7463 | const std::vector<SDValue> &AsmNodeOperands) { | |||
7464 | // Scan until we find the definition we already emitted of this operand. | |||
7465 | unsigned CurOp = InlineAsm::Op_FirstOperand; | |||
7466 | for (; OperandNo; --OperandNo) { | |||
7467 | // Advance to the next operand. | |||
7468 | unsigned OpFlag = | |||
7469 | cast<ConstantSDNode>(AsmNodeOperands[CurOp])->getZExtValue(); | |||
7470 | assert((InlineAsm::isRegDefKind(OpFlag) ||(((InlineAsm::isRegDefKind(OpFlag) || InlineAsm::isRegDefEarlyClobberKind (OpFlag) || InlineAsm::isMemKind(OpFlag)) && "Skipped past definitions?" ) ? static_cast<void> (0) : __assert_fail ("(InlineAsm::isRegDefKind(OpFlag) || InlineAsm::isRegDefEarlyClobberKind(OpFlag) || InlineAsm::isMemKind(OpFlag)) && \"Skipped past definitions?\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 7473, __PRETTY_FUNCTION__)) | |||
7471 | InlineAsm::isRegDefEarlyClobberKind(OpFlag) ||(((InlineAsm::isRegDefKind(OpFlag) || InlineAsm::isRegDefEarlyClobberKind (OpFlag) || InlineAsm::isMemKind(OpFlag)) && "Skipped past definitions?" ) ? static_cast<void> (0) : __assert_fail ("(InlineAsm::isRegDefKind(OpFlag) || InlineAsm::isRegDefEarlyClobberKind(OpFlag) || InlineAsm::isMemKind(OpFlag)) && \"Skipped past definitions?\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 7473, __PRETTY_FUNCTION__)) | |||
7472 | InlineAsm::isMemKind(OpFlag)) &&(((InlineAsm::isRegDefKind(OpFlag) || InlineAsm::isRegDefEarlyClobberKind (OpFlag) || InlineAsm::isMemKind(OpFlag)) && "Skipped past definitions?" ) ? static_cast<void> (0) : __assert_fail ("(InlineAsm::isRegDefKind(OpFlag) || InlineAsm::isRegDefEarlyClobberKind(OpFlag) || InlineAsm::isMemKind(OpFlag)) && \"Skipped past definitions?\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 7473, __PRETTY_FUNCTION__)) | |||
7473 | "Skipped past definitions?")(((InlineAsm::isRegDefKind(OpFlag) || InlineAsm::isRegDefEarlyClobberKind (OpFlag) || InlineAsm::isMemKind(OpFlag)) && "Skipped past definitions?" ) ? static_cast<void> (0) : __assert_fail ("(InlineAsm::isRegDefKind(OpFlag) || InlineAsm::isRegDefEarlyClobberKind(OpFlag) || InlineAsm::isMemKind(OpFlag)) && \"Skipped past definitions?\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 7473, __PRETTY_FUNCTION__)); | |||
7474 | CurOp += InlineAsm::getNumOperandRegisters(OpFlag) + 1; | |||
7475 | } | |||
7476 | return CurOp; | |||
7477 | } | |||
7478 | ||||
7479 | /// Fill \p Regs with \p NumRegs new virtual registers of type \p RegVT | |||
7480 | /// \return true if it has succeeded, false otherwise | |||
7481 | static bool createVirtualRegs(SmallVector<unsigned, 4> &Regs, unsigned NumRegs, | |||
7482 | MVT RegVT, SelectionDAG &DAG) { | |||
7483 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
7484 | MachineRegisterInfo &RegInfo = DAG.getMachineFunction().getRegInfo(); | |||
7485 | for (unsigned i = 0, e = NumRegs; i != e; ++i) { | |||
7486 | if (const TargetRegisterClass *RC = TLI.getRegClassFor(RegVT)) | |||
7487 | Regs.push_back(RegInfo.createVirtualRegister(RC)); | |||
7488 | else | |||
7489 | return false; | |||
7490 | } | |||
7491 | return true; | |||
7492 | } | |||
7493 | ||||
7494 | namespace { | |||
7495 | ||||
7496 | class ExtraFlags { | |||
7497 | unsigned Flags = 0; | |||
7498 | ||||
7499 | public: | |||
7500 | explicit ExtraFlags(ImmutableCallSite CS) { | |||
7501 | const InlineAsm *IA = cast<InlineAsm>(CS.getCalledValue()); | |||
7502 | if (IA->hasSideEffects()) | |||
7503 | Flags |= InlineAsm::Extra_HasSideEffects; | |||
7504 | if (IA->isAlignStack()) | |||
7505 | Flags |= InlineAsm::Extra_IsAlignStack; | |||
7506 | if (CS.isConvergent()) | |||
7507 | Flags |= InlineAsm::Extra_IsConvergent; | |||
7508 | Flags |= IA->getDialect() * InlineAsm::Extra_AsmDialect; | |||
7509 | } | |||
7510 | ||||
7511 | void update(const TargetLowering::AsmOperandInfo &OpInfo) { | |||
7512 | // Ideally, we would only check against memory constraints. However, the | |||
7513 | // meaning of an Other constraint can be target-specific and we can't easily | |||
7514 | // reason about it. Therefore, be conservative and set MayLoad/MayStore | |||
7515 | // for Other constraints as well. | |||
7516 | if (OpInfo.ConstraintType == TargetLowering::C_Memory || | |||
7517 | OpInfo.ConstraintType == TargetLowering::C_Other) { | |||
7518 | if (OpInfo.Type == InlineAsm::isInput) | |||
7519 | Flags |= InlineAsm::Extra_MayLoad; | |||
7520 | else if (OpInfo.Type == InlineAsm::isOutput) | |||
7521 | Flags |= InlineAsm::Extra_MayStore; | |||
7522 | else if (OpInfo.Type == InlineAsm::isClobber) | |||
7523 | Flags |= (InlineAsm::Extra_MayLoad | InlineAsm::Extra_MayStore); | |||
7524 | } | |||
7525 | } | |||
7526 | ||||
7527 | unsigned get() const { return Flags; } | |||
7528 | }; | |||
7529 | ||||
7530 | } // end anonymous namespace | |||
7531 | ||||
7532 | /// visitInlineAsm - Handle a call to an InlineAsm object. | |||
7533 | void SelectionDAGBuilder::visitInlineAsm(ImmutableCallSite CS) { | |||
7534 | const InlineAsm *IA = cast<InlineAsm>(CS.getCalledValue()); | |||
7535 | ||||
7536 | /// ConstraintOperands - Information about all of the constraints. | |||
7537 | SDISelAsmOperandInfoVector ConstraintOperands; | |||
7538 | ||||
7539 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
7540 | TargetLowering::AsmOperandInfoVector TargetConstraints = TLI.ParseConstraints( | |||
7541 | DAG.getDataLayout(), DAG.getSubtarget().getRegisterInfo(), CS); | |||
7542 | ||||
7543 | bool hasMemory = false; | |||
7544 | ||||
7545 | // Remember the HasSideEffect, AlignStack, AsmDialect, MayLoad and MayStore | |||
7546 | ExtraFlags ExtraInfo(CS); | |||
7547 | ||||
7548 | unsigned ArgNo = 0; // ArgNo - The argument of the CallInst. | |||
7549 | unsigned ResNo = 0; // ResNo - The result number of the next output. | |||
7550 | for (unsigned i = 0, e = TargetConstraints.size(); i != e; ++i) { | |||
| ||||
7551 | ConstraintOperands.push_back(SDISelAsmOperandInfo(TargetConstraints[i])); | |||
7552 | SDISelAsmOperandInfo &OpInfo = ConstraintOperands.back(); | |||
7553 | ||||
7554 | MVT OpVT = MVT::Other; | |||
7555 | ||||
7556 | // Compute the value type for each operand. | |||
7557 | if (OpInfo.Type == InlineAsm::isInput || | |||
7558 | (OpInfo.Type == InlineAsm::isOutput && OpInfo.isIndirect)) { | |||
7559 | OpInfo.CallOperandVal = const_cast<Value *>(CS.getArgument(ArgNo++)); | |||
7560 | ||||
7561 | // Process the call argument. BasicBlocks are labels, currently appearing | |||
7562 | // only in asm's. | |||
7563 | if (const BasicBlock *BB = dyn_cast<BasicBlock>(OpInfo.CallOperandVal)) { | |||
7564 | OpInfo.CallOperand = DAG.getBasicBlock(FuncInfo.MBBMap[BB]); | |||
7565 | } else { | |||
7566 | OpInfo.CallOperand = getValue(OpInfo.CallOperandVal); | |||
7567 | } | |||
7568 | ||||
7569 | OpVT = | |||
7570 | OpInfo | |||
7571 | .getCallOperandValEVT(*DAG.getContext(), TLI, DAG.getDataLayout()) | |||
7572 | .getSimpleVT(); | |||
7573 | } | |||
7574 | ||||
7575 | if (OpInfo.Type == InlineAsm::isOutput && !OpInfo.isIndirect) { | |||
7576 | // The return value of the call is this value. As such, there is no | |||
7577 | // corresponding argument. | |||
7578 | assert(!CS.getType()->isVoidTy() && "Bad inline asm!")((!CS.getType()->isVoidTy() && "Bad inline asm!") ? static_cast<void> (0) : __assert_fail ("!CS.getType()->isVoidTy() && \"Bad inline asm!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 7578, __PRETTY_FUNCTION__)); | |||
7579 | if (StructType *STy = dyn_cast<StructType>(CS.getType())) { | |||
7580 | OpVT = TLI.getSimpleValueType(DAG.getDataLayout(), | |||
7581 | STy->getElementType(ResNo)); | |||
7582 | } else { | |||
7583 | assert(ResNo == 0 && "Asm only has one result!")((ResNo == 0 && "Asm only has one result!") ? static_cast <void> (0) : __assert_fail ("ResNo == 0 && \"Asm only has one result!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 7583, __PRETTY_FUNCTION__)); | |||
7584 | OpVT = TLI.getSimpleValueType(DAG.getDataLayout(), CS.getType()); | |||
7585 | } | |||
7586 | ++ResNo; | |||
7587 | } | |||
7588 | ||||
7589 | OpInfo.ConstraintVT = OpVT; | |||
7590 | ||||
7591 | if (!hasMemory) | |||
7592 | hasMemory = OpInfo.hasMemory(TLI); | |||
7593 | ||||
7594 | // Determine if this InlineAsm MayLoad or MayStore based on the constraints. | |||
7595 | // FIXME: Could we compute this on OpInfo rather than TargetConstraints[i]? | |||
7596 | auto TargetConstraint = TargetConstraints[i]; | |||
7597 | ||||
7598 | // Compute the constraint code and ConstraintType to use. | |||
7599 | TLI.ComputeConstraintToUse(TargetConstraint, SDValue()); | |||
7600 | ||||
7601 | ExtraInfo.update(TargetConstraint); | |||
7602 | } | |||
7603 | ||||
7604 | SDValue Chain, Flag; | |||
7605 | ||||
7606 | // We won't need to flush pending loads if this asm doesn't touch | |||
7607 | // memory and is nonvolatile. | |||
7608 | if (hasMemory || IA->hasSideEffects()) | |||
7609 | Chain = getRoot(); | |||
7610 | else | |||
7611 | Chain = DAG.getRoot(); | |||
7612 | ||||
7613 | // Second pass over the constraints: compute which constraint option to use | |||
7614 | // and assign registers to constraints that want a specific physreg. | |||
7615 | for (unsigned i = 0, e = ConstraintOperands.size(); i != e; ++i) { | |||
7616 | SDISelAsmOperandInfo &OpInfo = ConstraintOperands[i]; | |||
7617 | ||||
7618 | // If this is an output operand with a matching input operand, look up the | |||
7619 | // matching input. If their types mismatch, e.g. one is an integer, the | |||
7620 | // other is floating point, or their sizes are different, flag it as an | |||
7621 | // error. | |||
7622 | if (OpInfo.hasMatchingInput()) { | |||
7623 | SDISelAsmOperandInfo &Input = ConstraintOperands[OpInfo.MatchingInput]; | |||
7624 | patchMatchingInput(OpInfo, Input, DAG); | |||
7625 | } | |||
7626 | ||||
7627 | // Compute the constraint code and ConstraintType to use. | |||
7628 | TLI.ComputeConstraintToUse(OpInfo, OpInfo.CallOperand, &DAG); | |||
7629 | ||||
7630 | if (OpInfo.ConstraintType == TargetLowering::C_Memory && | |||
7631 | OpInfo.Type == InlineAsm::isClobber) | |||
7632 | continue; | |||
7633 | ||||
7634 | // If this is a memory input, and if the operand is not indirect, do what we | |||
7635 | // need to provide an address for the memory input. | |||
7636 | if (OpInfo.ConstraintType == TargetLowering::C_Memory && | |||
7637 | !OpInfo.isIndirect) { | |||
7638 | assert((OpInfo.isMultipleAlternative ||(((OpInfo.isMultipleAlternative || (OpInfo.Type == InlineAsm:: isInput)) && "Can only indirectify direct input operands!" ) ? static_cast<void> (0) : __assert_fail ("(OpInfo.isMultipleAlternative || (OpInfo.Type == InlineAsm::isInput)) && \"Can only indirectify direct input operands!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 7640, __PRETTY_FUNCTION__)) | |||
7639 | (OpInfo.Type == InlineAsm::isInput)) &&(((OpInfo.isMultipleAlternative || (OpInfo.Type == InlineAsm:: isInput)) && "Can only indirectify direct input operands!" ) ? static_cast<void> (0) : __assert_fail ("(OpInfo.isMultipleAlternative || (OpInfo.Type == InlineAsm::isInput)) && \"Can only indirectify direct input operands!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 7640, __PRETTY_FUNCTION__)) | |||
7640 | "Can only indirectify direct input operands!")(((OpInfo.isMultipleAlternative || (OpInfo.Type == InlineAsm:: isInput)) && "Can only indirectify direct input operands!" ) ? static_cast<void> (0) : __assert_fail ("(OpInfo.isMultipleAlternative || (OpInfo.Type == InlineAsm::isInput)) && \"Can only indirectify direct input operands!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 7640, __PRETTY_FUNCTION__)); | |||
7641 | ||||
7642 | // Memory operands really want the address of the value. | |||
7643 | Chain = getAddressForMemoryInput(Chain, getCurSDLoc(), OpInfo, DAG); | |||
7644 | ||||
7645 | // There is no longer a Value* corresponding to this operand. | |||
7646 | OpInfo.CallOperandVal = nullptr; | |||
7647 | ||||
7648 | // It is now an indirect operand. | |||
7649 | OpInfo.isIndirect = true; | |||
7650 | } | |||
7651 | ||||
7652 | // If this constraint is for a specific register, allocate it before | |||
7653 | // anything else. | |||
7654 | SDISelAsmOperandInfo &RefOpInfo = | |||
7655 | OpInfo.isMatchingInputConstraint() | |||
7656 | ? ConstraintOperands[OpInfo.getMatchedOperand()] | |||
7657 | : ConstraintOperands[i]; | |||
7658 | if (RefOpInfo.ConstraintType == TargetLowering::C_Register) | |||
7659 | GetRegistersForValue(DAG, TLI, getCurSDLoc(), OpInfo, RefOpInfo); | |||
7660 | } | |||
7661 | ||||
7662 | // Third pass - Loop over all of the operands, assigning virtual or physregs | |||
7663 | // to register class operands. | |||
7664 | for (unsigned i = 0, e = ConstraintOperands.size(); i != e; ++i) { | |||
7665 | SDISelAsmOperandInfo &OpInfo = ConstraintOperands[i]; | |||
7666 | SDISelAsmOperandInfo &RefOpInfo = | |||
7667 | OpInfo.isMatchingInputConstraint() | |||
7668 | ? ConstraintOperands[OpInfo.getMatchedOperand()] | |||
7669 | : ConstraintOperands[i]; | |||
7670 | ||||
7671 | // C_Register operands have already been allocated, Other/Memory don't need | |||
7672 | // to be. | |||
7673 | if (RefOpInfo.ConstraintType == TargetLowering::C_RegisterClass) | |||
7674 | GetRegistersForValue(DAG, TLI, getCurSDLoc(), OpInfo, RefOpInfo); | |||
7675 | } | |||
7676 | ||||
7677 | // AsmNodeOperands - The operands for the ISD::INLINEASM node. | |||
7678 | std::vector<SDValue> AsmNodeOperands; | |||
7679 | AsmNodeOperands.push_back(SDValue()); // reserve space for input chain | |||
7680 | AsmNodeOperands.push_back(DAG.getTargetExternalSymbol( | |||
7681 | IA->getAsmString().c_str(), TLI.getPointerTy(DAG.getDataLayout()))); | |||
7682 | ||||
7683 | // If we have a !srcloc metadata node associated with it, we want to attach | |||
7684 | // this to the ultimately generated inline asm machineinstr. To do this, we | |||
7685 | // pass in the third operand as this (potentially null) inline asm MDNode. | |||
7686 | const MDNode *SrcLoc = CS.getInstruction()->getMetadata("srcloc"); | |||
7687 | AsmNodeOperands.push_back(DAG.getMDNode(SrcLoc)); | |||
7688 | ||||
7689 | // Remember the HasSideEffect, AlignStack, AsmDialect, MayLoad and MayStore | |||
7690 | // bits as operand 3. | |||
7691 | AsmNodeOperands.push_back(DAG.getTargetConstant( | |||
7692 | ExtraInfo.get(), getCurSDLoc(), TLI.getPointerTy(DAG.getDataLayout()))); | |||
7693 | ||||
7694 | // Loop over all of the inputs, copying the operand values into the | |||
7695 | // appropriate registers and processing the output regs. | |||
7696 | RegsForValue RetValRegs; | |||
7697 | ||||
7698 | // IndirectStoresToEmit - The set of stores to emit after the inline asm node. | |||
7699 | std::vector<std::pair<RegsForValue, Value *>> IndirectStoresToEmit; | |||
7700 | ||||
7701 | for (unsigned i = 0, e = ConstraintOperands.size(); i != e; ++i) { | |||
7702 | SDISelAsmOperandInfo &OpInfo = ConstraintOperands[i]; | |||
7703 | ||||
7704 | switch (OpInfo.Type) { | |||
7705 | case InlineAsm::isOutput: | |||
7706 | if (OpInfo.ConstraintType != TargetLowering::C_RegisterClass && | |||
7707 | OpInfo.ConstraintType != TargetLowering::C_Register) { | |||
7708 | // Memory output, or 'other' output (e.g. 'X' constraint). | |||
7709 | assert(OpInfo.isIndirect && "Memory output must be indirect operand")((OpInfo.isIndirect && "Memory output must be indirect operand" ) ? static_cast<void> (0) : __assert_fail ("OpInfo.isIndirect && \"Memory output must be indirect operand\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 7709, __PRETTY_FUNCTION__)); | |||
7710 | ||||
7711 | unsigned ConstraintID = | |||
7712 | TLI.getInlineAsmMemConstraint(OpInfo.ConstraintCode); | |||
7713 | assert(ConstraintID != InlineAsm::Constraint_Unknown &&((ConstraintID != InlineAsm::Constraint_Unknown && "Failed to convert memory constraint code to constraint id." ) ? static_cast<void> (0) : __assert_fail ("ConstraintID != InlineAsm::Constraint_Unknown && \"Failed to convert memory constraint code to constraint id.\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 7714, __PRETTY_FUNCTION__)) | |||
7714 | "Failed to convert memory constraint code to constraint id.")((ConstraintID != InlineAsm::Constraint_Unknown && "Failed to convert memory constraint code to constraint id." ) ? static_cast<void> (0) : __assert_fail ("ConstraintID != InlineAsm::Constraint_Unknown && \"Failed to convert memory constraint code to constraint id.\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 7714, __PRETTY_FUNCTION__)); | |||
7715 | ||||
7716 | // Add information to the INLINEASM node to know about this output. | |||
7717 | unsigned OpFlags = InlineAsm::getFlagWord(InlineAsm::Kind_Mem, 1); | |||
7718 | OpFlags = InlineAsm::getFlagWordForMem(OpFlags, ConstraintID); | |||
7719 | AsmNodeOperands.push_back(DAG.getTargetConstant(OpFlags, getCurSDLoc(), | |||
7720 | MVT::i32)); | |||
7721 | AsmNodeOperands.push_back(OpInfo.CallOperand); | |||
7722 | break; | |||
7723 | } | |||
7724 | ||||
7725 | // Otherwise, this is a register or register class output. | |||
7726 | ||||
7727 | // Copy the output from the appropriate register. Find a register that | |||
7728 | // we can use. | |||
7729 | if (OpInfo.AssignedRegs.Regs.empty()) { | |||
7730 | emitInlineAsmError( | |||
7731 | CS, "couldn't allocate output register for constraint '" + | |||
7732 | Twine(OpInfo.ConstraintCode) + "'"); | |||
7733 | return; | |||
7734 | } | |||
7735 | ||||
7736 | // If this is an indirect operand, store through the pointer after the | |||
7737 | // asm. | |||
7738 | if (OpInfo.isIndirect) { | |||
7739 | IndirectStoresToEmit.push_back(std::make_pair(OpInfo.AssignedRegs, | |||
7740 | OpInfo.CallOperandVal)); | |||
7741 | } else { | |||
7742 | // This is the result value of the call. | |||
7743 | assert(!CS.getType()->isVoidTy() && "Bad inline asm!")((!CS.getType()->isVoidTy() && "Bad inline asm!") ? static_cast<void> (0) : __assert_fail ("!CS.getType()->isVoidTy() && \"Bad inline asm!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 7743, __PRETTY_FUNCTION__)); | |||
7744 | // Concatenate this output onto the outputs list. | |||
7745 | RetValRegs.append(OpInfo.AssignedRegs); | |||
7746 | } | |||
7747 | ||||
7748 | // Add information to the INLINEASM node to know that this register is | |||
7749 | // set. | |||
7750 | OpInfo.AssignedRegs | |||
7751 | .AddInlineAsmOperands(OpInfo.isEarlyClobber | |||
7752 | ? InlineAsm::Kind_RegDefEarlyClobber | |||
7753 | : InlineAsm::Kind_RegDef, | |||
7754 | false, 0, getCurSDLoc(), DAG, AsmNodeOperands); | |||
7755 | break; | |||
7756 | ||||
7757 | case InlineAsm::isInput: { | |||
7758 | SDValue InOperandVal = OpInfo.CallOperand; | |||
7759 | ||||
7760 | if (OpInfo.isMatchingInputConstraint()) { | |||
7761 | // If this is required to match an output register we have already set, | |||
7762 | // just use its register. | |||
7763 | auto CurOp = findMatchingInlineAsmOperand(OpInfo.getMatchedOperand(), | |||
7764 | AsmNodeOperands); | |||
7765 | unsigned OpFlag = | |||
7766 | cast<ConstantSDNode>(AsmNodeOperands[CurOp])->getZExtValue(); | |||
7767 | if (InlineAsm::isRegDefKind(OpFlag) || | |||
7768 | InlineAsm::isRegDefEarlyClobberKind(OpFlag)) { | |||
7769 | // Add (OpFlag&0xffff)>>3 registers to MatchedRegs. | |||
7770 | if (OpInfo.isIndirect) { | |||
7771 | // This happens on gcc/testsuite/gcc.dg/pr8788-1.c | |||
7772 | emitInlineAsmError(CS, "inline asm not supported yet:" | |||
7773 | " don't know how to handle tied " | |||
7774 | "indirect register inputs"); | |||
7775 | return; | |||
7776 | } | |||
7777 | ||||
7778 | MVT RegVT = AsmNodeOperands[CurOp+1].getSimpleValueType(); | |||
7779 | SmallVector<unsigned, 4> Regs; | |||
7780 | ||||
7781 | if (!createVirtualRegs(Regs, | |||
7782 | InlineAsm::getNumOperandRegisters(OpFlag), | |||
7783 | RegVT, DAG)) { | |||
7784 | emitInlineAsmError(CS, "inline asm error: This value type register " | |||
7785 | "class is not natively supported!"); | |||
7786 | return; | |||
7787 | } | |||
7788 | ||||
7789 | RegsForValue MatchedRegs(Regs, RegVT, InOperandVal.getValueType()); | |||
7790 | ||||
7791 | SDLoc dl = getCurSDLoc(); | |||
7792 | // Use the produced MatchedRegs object to | |||
7793 | MatchedRegs.getCopyToRegs(InOperandVal, DAG, dl, Chain, &Flag, | |||
7794 | CS.getInstruction()); | |||
7795 | MatchedRegs.AddInlineAsmOperands(InlineAsm::Kind_RegUse, | |||
7796 | true, OpInfo.getMatchedOperand(), dl, | |||
7797 | DAG, AsmNodeOperands); | |||
7798 | break; | |||
7799 | } | |||
7800 | ||||
7801 | assert(InlineAsm::isMemKind(OpFlag) && "Unknown matching constraint!")((InlineAsm::isMemKind(OpFlag) && "Unknown matching constraint!" ) ? static_cast<void> (0) : __assert_fail ("InlineAsm::isMemKind(OpFlag) && \"Unknown matching constraint!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 7801, __PRETTY_FUNCTION__)); | |||
7802 | assert(InlineAsm::getNumOperandRegisters(OpFlag) == 1 &&((InlineAsm::getNumOperandRegisters(OpFlag) == 1 && "Unexpected number of operands" ) ? static_cast<void> (0) : __assert_fail ("InlineAsm::getNumOperandRegisters(OpFlag) == 1 && \"Unexpected number of operands\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 7803, __PRETTY_FUNCTION__)) | |||
7803 | "Unexpected number of operands")((InlineAsm::getNumOperandRegisters(OpFlag) == 1 && "Unexpected number of operands" ) ? static_cast<void> (0) : __assert_fail ("InlineAsm::getNumOperandRegisters(OpFlag) == 1 && \"Unexpected number of operands\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 7803, __PRETTY_FUNCTION__)); | |||
7804 | // Add information to the INLINEASM node to know about this input. | |||
7805 | // See InlineAsm.h isUseOperandTiedToDef. | |||
7806 | OpFlag = InlineAsm::convertMemFlagWordToMatchingFlagWord(OpFlag); | |||
7807 | OpFlag = InlineAsm::getFlagWordForMatchingOp(OpFlag, | |||
7808 | OpInfo.getMatchedOperand()); | |||
7809 | AsmNodeOperands.push_back(DAG.getTargetConstant( | |||
7810 | OpFlag, getCurSDLoc(), TLI.getPointerTy(DAG.getDataLayout()))); | |||
7811 | AsmNodeOperands.push_back(AsmNodeOperands[CurOp+1]); | |||
7812 | break; | |||
7813 | } | |||
7814 | ||||
7815 | // Treat indirect 'X' constraint as memory. | |||
7816 | if (OpInfo.ConstraintType == TargetLowering::C_Other && | |||
7817 | OpInfo.isIndirect) | |||
7818 | OpInfo.ConstraintType = TargetLowering::C_Memory; | |||
7819 | ||||
7820 | if (OpInfo.ConstraintType == TargetLowering::C_Other) { | |||
7821 | std::vector<SDValue> Ops; | |||
7822 | TLI.LowerAsmOperandForConstraint(InOperandVal, OpInfo.ConstraintCode, | |||
7823 | Ops, DAG); | |||
7824 | if (Ops.empty()) { | |||
7825 | emitInlineAsmError(CS, "invalid operand for inline asm constraint '" + | |||
7826 | Twine(OpInfo.ConstraintCode) + "'"); | |||
7827 | return; | |||
7828 | } | |||
7829 | ||||
7830 | // Add information to the INLINEASM node to know about this input. | |||
7831 | unsigned ResOpType = | |||
7832 | InlineAsm::getFlagWord(InlineAsm::Kind_Imm, Ops.size()); | |||
7833 | AsmNodeOperands.push_back(DAG.getTargetConstant( | |||
7834 | ResOpType, getCurSDLoc(), TLI.getPointerTy(DAG.getDataLayout()))); | |||
7835 | AsmNodeOperands.insert(AsmNodeOperands.end(), Ops.begin(), Ops.end()); | |||
7836 | break; | |||
7837 | } | |||
7838 | ||||
7839 | if (OpInfo.ConstraintType == TargetLowering::C_Memory) { | |||
7840 | assert(OpInfo.isIndirect && "Operand must be indirect to be a mem!")((OpInfo.isIndirect && "Operand must be indirect to be a mem!" ) ? static_cast<void> (0) : __assert_fail ("OpInfo.isIndirect && \"Operand must be indirect to be a mem!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 7840, __PRETTY_FUNCTION__)); | |||
7841 | assert(InOperandVal.getValueType() ==((InOperandVal.getValueType() == TLI.getPointerTy(DAG.getDataLayout ()) && "Memory operands expect pointer values") ? static_cast <void> (0) : __assert_fail ("InOperandVal.getValueType() == TLI.getPointerTy(DAG.getDataLayout()) && \"Memory operands expect pointer values\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 7843, __PRETTY_FUNCTION__)) | |||
7842 | TLI.getPointerTy(DAG.getDataLayout()) &&((InOperandVal.getValueType() == TLI.getPointerTy(DAG.getDataLayout ()) && "Memory operands expect pointer values") ? static_cast <void> (0) : __assert_fail ("InOperandVal.getValueType() == TLI.getPointerTy(DAG.getDataLayout()) && \"Memory operands expect pointer values\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 7843, __PRETTY_FUNCTION__)) | |||
7843 | "Memory operands expect pointer values")((InOperandVal.getValueType() == TLI.getPointerTy(DAG.getDataLayout ()) && "Memory operands expect pointer values") ? static_cast <void> (0) : __assert_fail ("InOperandVal.getValueType() == TLI.getPointerTy(DAG.getDataLayout()) && \"Memory operands expect pointer values\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 7843, __PRETTY_FUNCTION__)); | |||
7844 | ||||
7845 | unsigned ConstraintID = | |||
7846 | TLI.getInlineAsmMemConstraint(OpInfo.ConstraintCode); | |||
7847 | assert(ConstraintID != InlineAsm::Constraint_Unknown &&((ConstraintID != InlineAsm::Constraint_Unknown && "Failed to convert memory constraint code to constraint id." ) ? static_cast<void> (0) : __assert_fail ("ConstraintID != InlineAsm::Constraint_Unknown && \"Failed to convert memory constraint code to constraint id.\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 7848, __PRETTY_FUNCTION__)) | |||
7848 | "Failed to convert memory constraint code to constraint id.")((ConstraintID != InlineAsm::Constraint_Unknown && "Failed to convert memory constraint code to constraint id." ) ? static_cast<void> (0) : __assert_fail ("ConstraintID != InlineAsm::Constraint_Unknown && \"Failed to convert memory constraint code to constraint id.\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 7848, __PRETTY_FUNCTION__)); | |||
7849 | ||||
7850 | // Add information to the INLINEASM node to know about this input. | |||
7851 | unsigned ResOpType = InlineAsm::getFlagWord(InlineAsm::Kind_Mem, 1); | |||
7852 | ResOpType = InlineAsm::getFlagWordForMem(ResOpType, ConstraintID); | |||
7853 | AsmNodeOperands.push_back(DAG.getTargetConstant(ResOpType, | |||
7854 | getCurSDLoc(), | |||
7855 | MVT::i32)); | |||
7856 | AsmNodeOperands.push_back(InOperandVal); | |||
7857 | break; | |||
7858 | } | |||
7859 | ||||
7860 | assert((OpInfo.ConstraintType == TargetLowering::C_RegisterClass ||(((OpInfo.ConstraintType == TargetLowering::C_RegisterClass || OpInfo.ConstraintType == TargetLowering::C_Register) && "Unknown constraint type!") ? static_cast<void> (0) : __assert_fail ("(OpInfo.ConstraintType == TargetLowering::C_RegisterClass || OpInfo.ConstraintType == TargetLowering::C_Register) && \"Unknown constraint type!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 7862, __PRETTY_FUNCTION__)) | |||
7861 | OpInfo.ConstraintType == TargetLowering::C_Register) &&(((OpInfo.ConstraintType == TargetLowering::C_RegisterClass || OpInfo.ConstraintType == TargetLowering::C_Register) && "Unknown constraint type!") ? static_cast<void> (0) : __assert_fail ("(OpInfo.ConstraintType == TargetLowering::C_RegisterClass || OpInfo.ConstraintType == TargetLowering::C_Register) && \"Unknown constraint type!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 7862, __PRETTY_FUNCTION__)) | |||
7862 | "Unknown constraint type!")(((OpInfo.ConstraintType == TargetLowering::C_RegisterClass || OpInfo.ConstraintType == TargetLowering::C_Register) && "Unknown constraint type!") ? static_cast<void> (0) : __assert_fail ("(OpInfo.ConstraintType == TargetLowering::C_RegisterClass || OpInfo.ConstraintType == TargetLowering::C_Register) && \"Unknown constraint type!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 7862, __PRETTY_FUNCTION__)); | |||
7863 | ||||
7864 | // TODO: Support this. | |||
7865 | if (OpInfo.isIndirect) { | |||
7866 | emitInlineAsmError( | |||
7867 | CS, "Don't know how to handle indirect register inputs yet " | |||
7868 | "for constraint '" + | |||
7869 | Twine(OpInfo.ConstraintCode) + "'"); | |||
7870 | return; | |||
7871 | } | |||
7872 | ||||
7873 | // Copy the input into the appropriate registers. | |||
7874 | if (OpInfo.AssignedRegs.Regs.empty()) { | |||
7875 | emitInlineAsmError(CS, "couldn't allocate input reg for constraint '" + | |||
7876 | Twine(OpInfo.ConstraintCode) + "'"); | |||
7877 | return; | |||
7878 | } | |||
7879 | ||||
7880 | SDLoc dl = getCurSDLoc(); | |||
7881 | ||||
7882 | OpInfo.AssignedRegs.getCopyToRegs(InOperandVal, DAG, dl, | |||
7883 | Chain, &Flag, CS.getInstruction()); | |||
7884 | ||||
7885 | OpInfo.AssignedRegs.AddInlineAsmOperands(InlineAsm::Kind_RegUse, false, 0, | |||
7886 | dl, DAG, AsmNodeOperands); | |||
7887 | break; | |||
7888 | } | |||
7889 | case InlineAsm::isClobber: | |||
7890 | // Add the clobbered value to the operand list, so that the register | |||
7891 | // allocator is aware that the physreg got clobbered. | |||
7892 | if (!OpInfo.AssignedRegs.Regs.empty()) | |||
7893 | OpInfo.AssignedRegs.AddInlineAsmOperands(InlineAsm::Kind_Clobber, | |||
7894 | false, 0, getCurSDLoc(), DAG, | |||
7895 | AsmNodeOperands); | |||
7896 | break; | |||
7897 | } | |||
7898 | } | |||
7899 | ||||
7900 | // Finish up input operands. Set the input chain and add the flag last. | |||
7901 | AsmNodeOperands[InlineAsm::Op_InputChain] = Chain; | |||
7902 | if (Flag.getNode()) AsmNodeOperands.push_back(Flag); | |||
7903 | ||||
7904 | Chain = DAG.getNode(ISD::INLINEASM, getCurSDLoc(), | |||
7905 | DAG.getVTList(MVT::Other, MVT::Glue), AsmNodeOperands); | |||
7906 | Flag = Chain.getValue(1); | |||
7907 | ||||
7908 | // If this asm returns a register value, copy the result from that register | |||
7909 | // and set it as the value of the call. | |||
7910 | if (!RetValRegs.Regs.empty()) { | |||
7911 | SDValue Val = RetValRegs.getCopyFromRegs(DAG, FuncInfo, getCurSDLoc(), | |||
7912 | Chain, &Flag, CS.getInstruction()); | |||
7913 | ||||
7914 | llvm::Type *CSResultType = CS.getType(); | |||
7915 | unsigned numRet; | |||
7916 | ArrayRef<Type *> ResultTypes; | |||
7917 | SmallVector<SDValue, 1> ResultValues(1); | |||
7918 | if (CSResultType->isSingleValueType()) { | |||
7919 | numRet = 1; | |||
7920 | ResultValues[0] = Val; | |||
7921 | ResultTypes = makeArrayRef(CSResultType); | |||
7922 | } else { | |||
7923 | numRet = CSResultType->getNumContainedTypes(); | |||
7924 | assert(Val->getNumOperands() == numRet &&((Val->getNumOperands() == numRet && "Mismatch in number of output operands in asm result" ) ? static_cast<void> (0) : __assert_fail ("Val->getNumOperands() == numRet && \"Mismatch in number of output operands in asm result\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 7925, __PRETTY_FUNCTION__)) | |||
7925 | "Mismatch in number of output operands in asm result")((Val->getNumOperands() == numRet && "Mismatch in number of output operands in asm result" ) ? static_cast<void> (0) : __assert_fail ("Val->getNumOperands() == numRet && \"Mismatch in number of output operands in asm result\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 7925, __PRETTY_FUNCTION__)); | |||
7926 | ResultTypes = CSResultType->subtypes(); | |||
7927 | ArrayRef<SDUse> ValueUses = Val->ops(); | |||
7928 | ResultValues.resize(numRet); | |||
7929 | std::transform(ValueUses.begin(), ValueUses.end(), ResultValues.begin(), | |||
7930 | [](const SDUse &u) -> SDValue { return u.get(); }); | |||
7931 | } | |||
7932 | SmallVector<EVT, 1> ResultVTs(numRet); | |||
7933 | for (unsigned i = 0; i < numRet; i++) { | |||
7934 | EVT ResultVT = TLI.getValueType(DAG.getDataLayout(), ResultTypes[i]); | |||
7935 | SDValue Val = ResultValues[i]; | |||
7936 | assert(ResultTypes[i]->isSized() && "Unexpected unsized type")((ResultTypes[i]->isSized() && "Unexpected unsized type" ) ? static_cast<void> (0) : __assert_fail ("ResultTypes[i]->isSized() && \"Unexpected unsized type\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 7936, __PRETTY_FUNCTION__)); | |||
7937 | // If the type of the inline asm call site return value is different but | |||
7938 | // has same size as the type of the asm output bitcast it. One example | |||
7939 | // of this is for vectors with different width / number of elements. | |||
7940 | // This can happen for register classes that can contain multiple | |||
7941 | // different value types. The preg or vreg allocated may not have the | |||
7942 | // same VT as was expected. | |||
7943 | // | |||
7944 | // This can also happen for a return value that disagrees with the | |||
7945 | // register class it is put in, eg. a double in a general-purpose | |||
7946 | // register on a 32-bit machine. | |||
7947 | if (ResultVT != Val.getValueType() && | |||
7948 | ResultVT.getSizeInBits() == Val.getValueSizeInBits()) | |||
7949 | Val = DAG.getNode(ISD::BITCAST, getCurSDLoc(), ResultVT, Val); | |||
7950 | else if (ResultVT != Val.getValueType() && ResultVT.isInteger() && | |||
7951 | Val.getValueType().isInteger()) { | |||
7952 | // If a result value was tied to an input value, the computed result | |||
7953 | // may have a wider width than the expected result. Extract the | |||
7954 | // relevant portion. | |||
7955 | Val = DAG.getNode(ISD::TRUNCATE, getCurSDLoc(), ResultVT, Val); | |||
7956 | } | |||
7957 | ||||
7958 | assert(ResultVT == Val.getValueType() && "Asm result value mismatch!")((ResultVT == Val.getValueType() && "Asm result value mismatch!" ) ? static_cast<void> (0) : __assert_fail ("ResultVT == Val.getValueType() && \"Asm result value mismatch!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 7958, __PRETTY_FUNCTION__)); | |||
7959 | ResultVTs[i] = ResultVT; | |||
7960 | ResultValues[i] = Val; | |||
7961 | } | |||
7962 | ||||
7963 | Val = DAG.getNode(ISD::MERGE_VALUES, getCurSDLoc(), | |||
7964 | DAG.getVTList(ResultVTs), ResultValues); | |||
7965 | setValue(CS.getInstruction(), Val); | |||
7966 | // Don't need to use this as a chain in this case. | |||
7967 | if (!IA->hasSideEffects() && !hasMemory && IndirectStoresToEmit.empty()) | |||
7968 | return; | |||
7969 | } | |||
7970 | ||||
7971 | std::vector<std::pair<SDValue, const Value *>> StoresToEmit; | |||
7972 | ||||
7973 | // Process indirect outputs, first output all of the flagged copies out of | |||
7974 | // physregs. | |||
7975 | for (unsigned i = 0, e = IndirectStoresToEmit.size(); i != e; ++i) { | |||
7976 | RegsForValue &OutRegs = IndirectStoresToEmit[i].first; | |||
7977 | const Value *Ptr = IndirectStoresToEmit[i].second; | |||
7978 | SDValue OutVal = OutRegs.getCopyFromRegs(DAG, FuncInfo, getCurSDLoc(), | |||
7979 | Chain, &Flag, IA); | |||
7980 | StoresToEmit.push_back(std::make_pair(OutVal, Ptr)); | |||
7981 | } | |||
7982 | ||||
7983 | // Emit the non-flagged stores from the physregs. | |||
7984 | SmallVector<SDValue, 8> OutChains; | |||
7985 | for (unsigned i = 0, e = StoresToEmit.size(); i != e; ++i) { | |||
7986 | SDValue Val = DAG.getStore(Chain, getCurSDLoc(), StoresToEmit[i].first, | |||
7987 | getValue(StoresToEmit[i].second), | |||
7988 | MachinePointerInfo(StoresToEmit[i].second)); | |||
7989 | OutChains.push_back(Val); | |||
7990 | } | |||
7991 | ||||
7992 | if (!OutChains.empty()) | |||
7993 | Chain = DAG.getNode(ISD::TokenFactor, getCurSDLoc(), MVT::Other, OutChains); | |||
7994 | ||||
7995 | DAG.setRoot(Chain); | |||
7996 | } | |||
7997 | ||||
7998 | void SelectionDAGBuilder::emitInlineAsmError(ImmutableCallSite CS, | |||
7999 | const Twine &Message) { | |||
8000 | LLVMContext &Ctx = *DAG.getContext(); | |||
8001 | Ctx.emitError(CS.getInstruction(), Message); | |||
8002 | ||||
8003 | // Make sure we leave the DAG in a valid state | |||
8004 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
8005 | SmallVector<EVT, 1> ValueVTs; | |||
8006 | ComputeValueVTs(TLI, DAG.getDataLayout(), CS->getType(), ValueVTs); | |||
8007 | ||||
8008 | if (ValueVTs.empty()) | |||
8009 | return; | |||
8010 | ||||
8011 | SmallVector<SDValue, 1> Ops; | |||
8012 | for (unsigned i = 0, e = ValueVTs.size(); i != e; ++i) | |||
8013 | Ops.push_back(DAG.getUNDEF(ValueVTs[i])); | |||
8014 | ||||
8015 | setValue(CS.getInstruction(), DAG.getMergeValues(Ops, getCurSDLoc())); | |||
8016 | } | |||
8017 | ||||
8018 | void SelectionDAGBuilder::visitVAStart(const CallInst &I) { | |||
8019 | DAG.setRoot(DAG.getNode(ISD::VASTART, getCurSDLoc(), | |||
8020 | MVT::Other, getRoot(), | |||
8021 | getValue(I.getArgOperand(0)), | |||
8022 | DAG.getSrcValue(I.getArgOperand(0)))); | |||
8023 | } | |||
8024 | ||||
8025 | void SelectionDAGBuilder::visitVAArg(const VAArgInst &I) { | |||
8026 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
8027 | const DataLayout &DL = DAG.getDataLayout(); | |||
8028 | SDValue V = DAG.getVAArg(TLI.getValueType(DAG.getDataLayout(), I.getType()), | |||
8029 | getCurSDLoc(), getRoot(), getValue(I.getOperand(0)), | |||
8030 | DAG.getSrcValue(I.getOperand(0)), | |||
8031 | DL.getABITypeAlignment(I.getType())); | |||
8032 | setValue(&I, V); | |||
8033 | DAG.setRoot(V.getValue(1)); | |||
8034 | } | |||
8035 | ||||
8036 | void SelectionDAGBuilder::visitVAEnd(const CallInst &I) { | |||
8037 | DAG.setRoot(DAG.getNode(ISD::VAEND, getCurSDLoc(), | |||
8038 | MVT::Other, getRoot(), | |||
8039 | getValue(I.getArgOperand(0)), | |||
8040 | DAG.getSrcValue(I.getArgOperand(0)))); | |||
8041 | } | |||
8042 | ||||
8043 | void SelectionDAGBuilder::visitVACopy(const CallInst &I) { | |||
8044 | DAG.setRoot(DAG.getNode(ISD::VACOPY, getCurSDLoc(), | |||
8045 | MVT::Other, getRoot(), | |||
8046 | getValue(I.getArgOperand(0)), | |||
8047 | getValue(I.getArgOperand(1)), | |||
8048 | DAG.getSrcValue(I.getArgOperand(0)), | |||
8049 | DAG.getSrcValue(I.getArgOperand(1)))); | |||
8050 | } | |||
8051 | ||||
8052 | SDValue SelectionDAGBuilder::lowerRangeToAssertZExt(SelectionDAG &DAG, | |||
8053 | const Instruction &I, | |||
8054 | SDValue Op) { | |||
8055 | const MDNode *Range = I.getMetadata(LLVMContext::MD_range); | |||
8056 | if (!Range) | |||
8057 | return Op; | |||
8058 | ||||
8059 | ConstantRange CR = getConstantRangeFromMetadata(*Range); | |||
8060 | if (CR.isFullSet() || CR.isEmptySet() || CR.isWrappedSet()) | |||
8061 | return Op; | |||
8062 | ||||
8063 | APInt Lo = CR.getUnsignedMin(); | |||
8064 | if (!Lo.isMinValue()) | |||
8065 | return Op; | |||
8066 | ||||
8067 | APInt Hi = CR.getUnsignedMax(); | |||
8068 | unsigned Bits = std::max(Hi.getActiveBits(), | |||
8069 | static_cast<unsigned>(IntegerType::MIN_INT_BITS)); | |||
8070 | ||||
8071 | EVT SmallVT = EVT::getIntegerVT(*DAG.getContext(), Bits); | |||
8072 | ||||
8073 | SDLoc SL = getCurSDLoc(); | |||
8074 | ||||
8075 | SDValue ZExt = DAG.getNode(ISD::AssertZext, SL, Op.getValueType(), Op, | |||
8076 | DAG.getValueType(SmallVT)); | |||
8077 | unsigned NumVals = Op.getNode()->getNumValues(); | |||
8078 | if (NumVals == 1) | |||
8079 | return ZExt; | |||
8080 | ||||
8081 | SmallVector<SDValue, 4> Ops; | |||
8082 | ||||
8083 | Ops.push_back(ZExt); | |||
8084 | for (unsigned I = 1; I != NumVals; ++I) | |||
8085 | Ops.push_back(Op.getValue(I)); | |||
8086 | ||||
8087 | return DAG.getMergeValues(Ops, SL); | |||
8088 | } | |||
8089 | ||||
8090 | /// Populate a CallLowerinInfo (into \p CLI) based on the properties of | |||
8091 | /// the call being lowered. | |||
8092 | /// | |||
8093 | /// This is a helper for lowering intrinsics that follow a target calling | |||
8094 | /// convention or require stack pointer adjustment. Only a subset of the | |||
8095 | /// intrinsic's operands need to participate in the calling convention. | |||
8096 | void SelectionDAGBuilder::populateCallLoweringInfo( | |||
8097 | TargetLowering::CallLoweringInfo &CLI, ImmutableCallSite CS, | |||
8098 | unsigned ArgIdx, unsigned NumArgs, SDValue Callee, Type *ReturnTy, | |||
8099 | bool IsPatchPoint) { | |||
8100 | TargetLowering::ArgListTy Args; | |||
8101 | Args.reserve(NumArgs); | |||
8102 | ||||
8103 | // Populate the argument list. | |||
8104 | // Attributes for args start at offset 1, after the return attribute. | |||
8105 | for (unsigned ArgI = ArgIdx, ArgE = ArgIdx + NumArgs; | |||
8106 | ArgI != ArgE; ++ArgI) { | |||
8107 | const Value *V = CS->getOperand(ArgI); | |||
8108 | ||||
8109 | assert(!V->getType()->isEmptyTy() && "Empty type passed to intrinsic.")((!V->getType()->isEmptyTy() && "Empty type passed to intrinsic." ) ? static_cast<void> (0) : __assert_fail ("!V->getType()->isEmptyTy() && \"Empty type passed to intrinsic.\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 8109, __PRETTY_FUNCTION__)); | |||
8110 | ||||
8111 | TargetLowering::ArgListEntry Entry; | |||
8112 | Entry.Node = getValue(V); | |||
8113 | Entry.Ty = V->getType(); | |||
8114 | Entry.setAttributes(&CS, ArgI); | |||
8115 | Args.push_back(Entry); | |||
8116 | } | |||
8117 | ||||
8118 | CLI.setDebugLoc(getCurSDLoc()) | |||
8119 | .setChain(getRoot()) | |||
8120 | .setCallee(CS.getCallingConv(), ReturnTy, Callee, std::move(Args)) | |||
8121 | .setDiscardResult(CS->use_empty()) | |||
8122 | .setIsPatchPoint(IsPatchPoint); | |||
8123 | } | |||
8124 | ||||
8125 | /// Add a stack map intrinsic call's live variable operands to a stackmap | |||
8126 | /// or patchpoint target node's operand list. | |||
8127 | /// | |||
8128 | /// Constants are converted to TargetConstants purely as an optimization to | |||
8129 | /// avoid constant materialization and register allocation. | |||
8130 | /// | |||
8131 | /// FrameIndex operands are converted to TargetFrameIndex so that ISEL does not | |||
8132 | /// generate addess computation nodes, and so ExpandISelPseudo can convert the | |||
8133 | /// TargetFrameIndex into a DirectMemRefOp StackMap location. This avoids | |||
8134 | /// address materialization and register allocation, but may also be required | |||
8135 | /// for correctness. If a StackMap (or PatchPoint) intrinsic directly uses an | |||
8136 | /// alloca in the entry block, then the runtime may assume that the alloca's | |||
8137 | /// StackMap location can be read immediately after compilation and that the | |||
8138 | /// location is valid at any point during execution (this is similar to the | |||
8139 | /// assumption made by the llvm.gcroot intrinsic). If the alloca's location were | |||
8140 | /// only available in a register, then the runtime would need to trap when | |||
8141 | /// execution reaches the StackMap in order to read the alloca's location. | |||
8142 | static void addStackMapLiveVars(ImmutableCallSite CS, unsigned StartIdx, | |||
8143 | const SDLoc &DL, SmallVectorImpl<SDValue> &Ops, | |||
8144 | SelectionDAGBuilder &Builder) { | |||
8145 | for (unsigned i = StartIdx, e = CS.arg_size(); i != e; ++i) { | |||
8146 | SDValue OpVal = Builder.getValue(CS.getArgument(i)); | |||
8147 | if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(OpVal)) { | |||
8148 | Ops.push_back( | |||
8149 | Builder.DAG.getTargetConstant(StackMaps::ConstantOp, DL, MVT::i64)); | |||
8150 | Ops.push_back( | |||
8151 | Builder.DAG.getTargetConstant(C->getSExtValue(), DL, MVT::i64)); | |||
8152 | } else if (FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(OpVal)) { | |||
8153 | const TargetLowering &TLI = Builder.DAG.getTargetLoweringInfo(); | |||
8154 | Ops.push_back(Builder.DAG.getTargetFrameIndex( | |||
8155 | FI->getIndex(), TLI.getFrameIndexTy(Builder.DAG.getDataLayout()))); | |||
8156 | } else | |||
8157 | Ops.push_back(OpVal); | |||
8158 | } | |||
8159 | } | |||
8160 | ||||
8161 | /// Lower llvm.experimental.stackmap directly to its target opcode. | |||
8162 | void SelectionDAGBuilder::visitStackmap(const CallInst &CI) { | |||
8163 | // void @llvm.experimental.stackmap(i32 <id>, i32 <numShadowBytes>, | |||
8164 | // [live variables...]) | |||
8165 | ||||
8166 | assert(CI.getType()->isVoidTy() && "Stackmap cannot return a value.")((CI.getType()->isVoidTy() && "Stackmap cannot return a value." ) ? static_cast<void> (0) : __assert_fail ("CI.getType()->isVoidTy() && \"Stackmap cannot return a value.\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 8166, __PRETTY_FUNCTION__)); | |||
8167 | ||||
8168 | SDValue Chain, InFlag, Callee, NullPtr; | |||
8169 | SmallVector<SDValue, 32> Ops; | |||
8170 | ||||
8171 | SDLoc DL = getCurSDLoc(); | |||
8172 | Callee = getValue(CI.getCalledValue()); | |||
8173 | NullPtr = DAG.getIntPtrConstant(0, DL, true); | |||
8174 | ||||
8175 | // The stackmap intrinsic only records the live variables (the arguemnts | |||
8176 | // passed to it) and emits NOPS (if requested). Unlike the patchpoint | |||
8177 | // intrinsic, this won't be lowered to a function call. This means we don't | |||
8178 | // have to worry about calling conventions and target specific lowering code. | |||
8179 | // Instead we perform the call lowering right here. | |||
8180 | // | |||
8181 | // chain, flag = CALLSEQ_START(chain, 0, 0) | |||
8182 | // chain, flag = STACKMAP(id, nbytes, ..., chain, flag) | |||
8183 | // chain, flag = CALLSEQ_END(chain, 0, 0, flag) | |||
8184 | // | |||
8185 | Chain = DAG.getCALLSEQ_START(getRoot(), 0, 0, DL); | |||
8186 | InFlag = Chain.getValue(1); | |||
8187 | ||||
8188 | // Add the <id> and <numBytes> constants. | |||
8189 | SDValue IDVal = getValue(CI.getOperand(PatchPointOpers::IDPos)); | |||
8190 | Ops.push_back(DAG.getTargetConstant( | |||
8191 | cast<ConstantSDNode>(IDVal)->getZExtValue(), DL, MVT::i64)); | |||
8192 | SDValue NBytesVal = getValue(CI.getOperand(PatchPointOpers::NBytesPos)); | |||
8193 | Ops.push_back(DAG.getTargetConstant( | |||
8194 | cast<ConstantSDNode>(NBytesVal)->getZExtValue(), DL, | |||
8195 | MVT::i32)); | |||
8196 | ||||
8197 | // Push live variables for the stack map. | |||
8198 | addStackMapLiveVars(&CI, 2, DL, Ops, *this); | |||
8199 | ||||
8200 | // We are not pushing any register mask info here on the operands list, | |||
8201 | // because the stackmap doesn't clobber anything. | |||
8202 | ||||
8203 | // Push the chain and the glue flag. | |||
8204 | Ops.push_back(Chain); | |||
8205 | Ops.push_back(InFlag); | |||
8206 | ||||
8207 | // Create the STACKMAP node. | |||
8208 | SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue); | |||
8209 | SDNode *SM = DAG.getMachineNode(TargetOpcode::STACKMAP, DL, NodeTys, Ops); | |||
8210 | Chain = SDValue(SM, 0); | |||
8211 | InFlag = Chain.getValue(1); | |||
8212 | ||||
8213 | Chain = DAG.getCALLSEQ_END(Chain, NullPtr, NullPtr, InFlag, DL); | |||
8214 | ||||
8215 | // Stackmaps don't generate values, so nothing goes into the NodeMap. | |||
8216 | ||||
8217 | // Set the root to the target-lowered call chain. | |||
8218 | DAG.setRoot(Chain); | |||
8219 | ||||
8220 | // Inform the Frame Information that we have a stackmap in this function. | |||
8221 | FuncInfo.MF->getFrameInfo().setHasStackMap(); | |||
8222 | } | |||
8223 | ||||
8224 | /// Lower llvm.experimental.patchpoint directly to its target opcode. | |||
8225 | void SelectionDAGBuilder::visitPatchpoint(ImmutableCallSite CS, | |||
8226 | const BasicBlock *EHPadBB) { | |||
8227 | // void|i64 @llvm.experimental.patchpoint.void|i64(i64 <id>, | |||
8228 | // i32 <numBytes>, | |||
8229 | // i8* <target>, | |||
8230 | // i32 <numArgs>, | |||
8231 | // [Args...], | |||
8232 | // [live variables...]) | |||
8233 | ||||
8234 | CallingConv::ID CC = CS.getCallingConv(); | |||
8235 | bool IsAnyRegCC = CC == CallingConv::AnyReg; | |||
8236 | bool HasDef = !CS->getType()->isVoidTy(); | |||
8237 | SDLoc dl = getCurSDLoc(); | |||
8238 | SDValue Callee = getValue(CS->getOperand(PatchPointOpers::TargetPos)); | |||
8239 | ||||
8240 | // Handle immediate and symbolic callees. | |||
8241 | if (auto* ConstCallee = dyn_cast<ConstantSDNode>(Callee)) | |||
8242 | Callee = DAG.getIntPtrConstant(ConstCallee->getZExtValue(), dl, | |||
8243 | /*isTarget=*/true); | |||
8244 | else if (auto* SymbolicCallee = dyn_cast<GlobalAddressSDNode>(Callee)) | |||
8245 | Callee = DAG.getTargetGlobalAddress(SymbolicCallee->getGlobal(), | |||
8246 | SDLoc(SymbolicCallee), | |||
8247 | SymbolicCallee->getValueType(0)); | |||
8248 | ||||
8249 | // Get the real number of arguments participating in the call <numArgs> | |||
8250 | SDValue NArgVal = getValue(CS.getArgument(PatchPointOpers::NArgPos)); | |||
8251 | unsigned NumArgs = cast<ConstantSDNode>(NArgVal)->getZExtValue(); | |||
8252 | ||||
8253 | // Skip the four meta args: <id>, <numNopBytes>, <target>, <numArgs> | |||
8254 | // Intrinsics include all meta-operands up to but not including CC. | |||
8255 | unsigned NumMetaOpers = PatchPointOpers::CCPos; | |||
8256 | assert(CS.arg_size() >= NumMetaOpers + NumArgs &&((CS.arg_size() >= NumMetaOpers + NumArgs && "Not enough arguments provided to the patchpoint intrinsic" ) ? static_cast<void> (0) : __assert_fail ("CS.arg_size() >= NumMetaOpers + NumArgs && \"Not enough arguments provided to the patchpoint intrinsic\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 8257, __PRETTY_FUNCTION__)) | |||
8257 | "Not enough arguments provided to the patchpoint intrinsic")((CS.arg_size() >= NumMetaOpers + NumArgs && "Not enough arguments provided to the patchpoint intrinsic" ) ? static_cast<void> (0) : __assert_fail ("CS.arg_size() >= NumMetaOpers + NumArgs && \"Not enough arguments provided to the patchpoint intrinsic\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 8257, __PRETTY_FUNCTION__)); | |||
8258 | ||||
8259 | // For AnyRegCC the arguments are lowered later on manually. | |||
8260 | unsigned NumCallArgs = IsAnyRegCC ? 0 : NumArgs; | |||
8261 | Type *ReturnTy = | |||
8262 | IsAnyRegCC ? Type::getVoidTy(*DAG.getContext()) : CS->getType(); | |||
8263 | ||||
8264 | TargetLowering::CallLoweringInfo CLI(DAG); | |||
8265 | populateCallLoweringInfo(CLI, CS, NumMetaOpers, NumCallArgs, Callee, ReturnTy, | |||
8266 | true); | |||
8267 | std::pair<SDValue, SDValue> Result = lowerInvokable(CLI, EHPadBB); | |||
8268 | ||||
8269 | SDNode *CallEnd = Result.second.getNode(); | |||
8270 | if (HasDef && (CallEnd->getOpcode() == ISD::CopyFromReg)) | |||
8271 | CallEnd = CallEnd->getOperand(0).getNode(); | |||
8272 | ||||
8273 | /// Get a call instruction from the call sequence chain. | |||
8274 | /// Tail calls are not allowed. | |||
8275 | assert(CallEnd->getOpcode() == ISD::CALLSEQ_END &&((CallEnd->getOpcode() == ISD::CALLSEQ_END && "Expected a callseq node." ) ? static_cast<void> (0) : __assert_fail ("CallEnd->getOpcode() == ISD::CALLSEQ_END && \"Expected a callseq node.\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 8276, __PRETTY_FUNCTION__)) | |||
8276 | "Expected a callseq node.")((CallEnd->getOpcode() == ISD::CALLSEQ_END && "Expected a callseq node." ) ? static_cast<void> (0) : __assert_fail ("CallEnd->getOpcode() == ISD::CALLSEQ_END && \"Expected a callseq node.\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 8276, __PRETTY_FUNCTION__)); | |||
8277 | SDNode *Call = CallEnd->getOperand(0).getNode(); | |||
8278 | bool HasGlue = Call->getGluedNode(); | |||
8279 | ||||
8280 | // Replace the target specific call node with the patchable intrinsic. | |||
8281 | SmallVector<SDValue, 8> Ops; | |||
8282 | ||||
8283 | // Add the <id> and <numBytes> constants. | |||
8284 | SDValue IDVal = getValue(CS->getOperand(PatchPointOpers::IDPos)); | |||
8285 | Ops.push_back(DAG.getTargetConstant( | |||
8286 | cast<ConstantSDNode>(IDVal)->getZExtValue(), dl, MVT::i64)); | |||
8287 | SDValue NBytesVal = getValue(CS->getOperand(PatchPointOpers::NBytesPos)); | |||
8288 | Ops.push_back(DAG.getTargetConstant( | |||
8289 | cast<ConstantSDNode>(NBytesVal)->getZExtValue(), dl, | |||
8290 | MVT::i32)); | |||
8291 | ||||
8292 | // Add the callee. | |||
8293 | Ops.push_back(Callee); | |||
8294 | ||||
8295 | // Adjust <numArgs> to account for any arguments that have been passed on the | |||
8296 | // stack instead. | |||
8297 | // Call Node: Chain, Target, {Args}, RegMask, [Glue] | |||
8298 | unsigned NumCallRegArgs = Call->getNumOperands() - (HasGlue ? 4 : 3); | |||
8299 | NumCallRegArgs = IsAnyRegCC ? NumArgs : NumCallRegArgs; | |||
8300 | Ops.push_back(DAG.getTargetConstant(NumCallRegArgs, dl, MVT::i32)); | |||
8301 | ||||
8302 | // Add the calling convention | |||
8303 | Ops.push_back(DAG.getTargetConstant((unsigned)CC, dl, MVT::i32)); | |||
8304 | ||||
8305 | // Add the arguments we omitted previously. The register allocator should | |||
8306 | // place these in any free register. | |||
8307 | if (IsAnyRegCC) | |||
8308 | for (unsigned i = NumMetaOpers, e = NumMetaOpers + NumArgs; i != e; ++i) | |||
8309 | Ops.push_back(getValue(CS.getArgument(i))); | |||
8310 | ||||
8311 | // Push the arguments from the call instruction up to the register mask. | |||
8312 | SDNode::op_iterator e = HasGlue ? Call->op_end()-2 : Call->op_end()-1; | |||
8313 | Ops.append(Call->op_begin() + 2, e); | |||
8314 | ||||
8315 | // Push live variables for the stack map. | |||
8316 | addStackMapLiveVars(CS, NumMetaOpers + NumArgs, dl, Ops, *this); | |||
8317 | ||||
8318 | // Push the register mask info. | |||
8319 | if (HasGlue) | |||
8320 | Ops.push_back(*(Call->op_end()-2)); | |||
8321 | else | |||
8322 | Ops.push_back(*(Call->op_end()-1)); | |||
8323 | ||||
8324 | // Push the chain (this is originally the first operand of the call, but | |||
8325 | // becomes now the last or second to last operand). | |||
8326 | Ops.push_back(*(Call->op_begin())); | |||
8327 | ||||
8328 | // Push the glue flag (last operand). | |||
8329 | if (HasGlue) | |||
8330 | Ops.push_back(*(Call->op_end()-1)); | |||
8331 | ||||
8332 | SDVTList NodeTys; | |||
8333 | if (IsAnyRegCC && HasDef) { | |||
8334 | // Create the return types based on the intrinsic definition | |||
8335 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
8336 | SmallVector<EVT, 3> ValueVTs; | |||
8337 | ComputeValueVTs(TLI, DAG.getDataLayout(), CS->getType(), ValueVTs); | |||
8338 | assert(ValueVTs.size() == 1 && "Expected only one return value type.")((ValueVTs.size() == 1 && "Expected only one return value type." ) ? static_cast<void> (0) : __assert_fail ("ValueVTs.size() == 1 && \"Expected only one return value type.\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 8338, __PRETTY_FUNCTION__)); | |||
8339 | ||||
8340 | // There is always a chain and a glue type at the end | |||
8341 | ValueVTs.push_back(MVT::Other); | |||
8342 | ValueVTs.push_back(MVT::Glue); | |||
8343 | NodeTys = DAG.getVTList(ValueVTs); | |||
8344 | } else | |||
8345 | NodeTys = DAG.getVTList(MVT::Other, MVT::Glue); | |||
8346 | ||||
8347 | // Replace the target specific call node with a PATCHPOINT node. | |||
8348 | MachineSDNode *MN = DAG.getMachineNode(TargetOpcode::PATCHPOINT, | |||
8349 | dl, NodeTys, Ops); | |||
8350 | ||||
8351 | // Update the NodeMap. | |||
8352 | if (HasDef) { | |||
8353 | if (IsAnyRegCC) | |||
8354 | setValue(CS.getInstruction(), SDValue(MN, 0)); | |||
8355 | else | |||
8356 | setValue(CS.getInstruction(), Result.first); | |||
8357 | } | |||
8358 | ||||
8359 | // Fixup the consumers of the intrinsic. The chain and glue may be used in the | |||
8360 | // call sequence. Furthermore the location of the chain and glue can change | |||
8361 | // when the AnyReg calling convention is used and the intrinsic returns a | |||
8362 | // value. | |||
8363 | if (IsAnyRegCC && HasDef) { | |||
8364 | SDValue From[] = {SDValue(Call, 0), SDValue(Call, 1)}; | |||
8365 | SDValue To[] = {SDValue(MN, 1), SDValue(MN, 2)}; | |||
8366 | DAG.ReplaceAllUsesOfValuesWith(From, To, 2); | |||
8367 | } else | |||
8368 | DAG.ReplaceAllUsesWith(Call, MN); | |||
8369 | DAG.DeleteNode(Call); | |||
8370 | ||||
8371 | // Inform the Frame Information that we have a patchpoint in this function. | |||
8372 | FuncInfo.MF->getFrameInfo().setHasPatchPoint(); | |||
8373 | } | |||
8374 | ||||
8375 | void SelectionDAGBuilder::visitVectorReduce(const CallInst &I, | |||
8376 | unsigned Intrinsic) { | |||
8377 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
8378 | SDValue Op1 = getValue(I.getArgOperand(0)); | |||
8379 | SDValue Op2; | |||
8380 | if (I.getNumArgOperands() > 1) | |||
8381 | Op2 = getValue(I.getArgOperand(1)); | |||
8382 | SDLoc dl = getCurSDLoc(); | |||
8383 | EVT VT = TLI.getValueType(DAG.getDataLayout(), I.getType()); | |||
8384 | SDValue Res; | |||
8385 | FastMathFlags FMF; | |||
8386 | if (isa<FPMathOperator>(I)) | |||
8387 | FMF = I.getFastMathFlags(); | |||
8388 | ||||
8389 | switch (Intrinsic) { | |||
8390 | case Intrinsic::experimental_vector_reduce_fadd: | |||
8391 | if (FMF.isFast()) | |||
8392 | Res = DAG.getNode(ISD::VECREDUCE_FADD, dl, VT, Op2); | |||
8393 | else | |||
8394 | Res = DAG.getNode(ISD::VECREDUCE_STRICT_FADD, dl, VT, Op1, Op2); | |||
8395 | break; | |||
8396 | case Intrinsic::experimental_vector_reduce_fmul: | |||
8397 | if (FMF.isFast()) | |||
8398 | Res = DAG.getNode(ISD::VECREDUCE_FMUL, dl, VT, Op2); | |||
8399 | else | |||
8400 | Res = DAG.getNode(ISD::VECREDUCE_STRICT_FMUL, dl, VT, Op1, Op2); | |||
8401 | break; | |||
8402 | case Intrinsic::experimental_vector_reduce_add: | |||
8403 | Res = DAG.getNode(ISD::VECREDUCE_ADD, dl, VT, Op1); | |||
8404 | break; | |||
8405 | case Intrinsic::experimental_vector_reduce_mul: | |||
8406 | Res = DAG.getNode(ISD::VECREDUCE_MUL, dl, VT, Op1); | |||
8407 | break; | |||
8408 | case Intrinsic::experimental_vector_reduce_and: | |||
8409 | Res = DAG.getNode(ISD::VECREDUCE_AND, dl, VT, Op1); | |||
8410 | break; | |||
8411 | case Intrinsic::experimental_vector_reduce_or: | |||
8412 | Res = DAG.getNode(ISD::VECREDUCE_OR, dl, VT, Op1); | |||
8413 | break; | |||
8414 | case Intrinsic::experimental_vector_reduce_xor: | |||
8415 | Res = DAG.getNode(ISD::VECREDUCE_XOR, dl, VT, Op1); | |||
8416 | break; | |||
8417 | case Intrinsic::experimental_vector_reduce_smax: | |||
8418 | Res = DAG.getNode(ISD::VECREDUCE_SMAX, dl, VT, Op1); | |||
8419 | break; | |||
8420 | case Intrinsic::experimental_vector_reduce_smin: | |||
8421 | Res = DAG.getNode(ISD::VECREDUCE_SMIN, dl, VT, Op1); | |||
8422 | break; | |||
8423 | case Intrinsic::experimental_vector_reduce_umax: | |||
8424 | Res = DAG.getNode(ISD::VECREDUCE_UMAX, dl, VT, Op1); | |||
8425 | break; | |||
8426 | case Intrinsic::experimental_vector_reduce_umin: | |||
8427 | Res = DAG.getNode(ISD::VECREDUCE_UMIN, dl, VT, Op1); | |||
8428 | break; | |||
8429 | case Intrinsic::experimental_vector_reduce_fmax: | |||
8430 | Res = DAG.getNode(ISD::VECREDUCE_FMAX, dl, VT, Op1); | |||
8431 | break; | |||
8432 | case Intrinsic::experimental_vector_reduce_fmin: | |||
8433 | Res = DAG.getNode(ISD::VECREDUCE_FMIN, dl, VT, Op1); | |||
8434 | break; | |||
8435 | default: | |||
8436 | llvm_unreachable("Unhandled vector reduce intrinsic")::llvm::llvm_unreachable_internal("Unhandled vector reduce intrinsic" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 8436); | |||
8437 | } | |||
8438 | setValue(&I, Res); | |||
8439 | } | |||
8440 | ||||
8441 | /// Returns an AttributeList representing the attributes applied to the return | |||
8442 | /// value of the given call. | |||
8443 | static AttributeList getReturnAttrs(TargetLowering::CallLoweringInfo &CLI) { | |||
8444 | SmallVector<Attribute::AttrKind, 2> Attrs; | |||
8445 | if (CLI.RetSExt) | |||
8446 | Attrs.push_back(Attribute::SExt); | |||
8447 | if (CLI.RetZExt) | |||
8448 | Attrs.push_back(Attribute::ZExt); | |||
8449 | if (CLI.IsInReg) | |||
8450 | Attrs.push_back(Attribute::InReg); | |||
8451 | ||||
8452 | return AttributeList::get(CLI.RetTy->getContext(), AttributeList::ReturnIndex, | |||
8453 | Attrs); | |||
8454 | } | |||
8455 | ||||
8456 | /// TargetLowering::LowerCallTo - This is the default LowerCallTo | |||
8457 | /// implementation, which just calls LowerCall. | |||
8458 | /// FIXME: When all targets are | |||
8459 | /// migrated to using LowerCall, this hook should be integrated into SDISel. | |||
8460 | std::pair<SDValue, SDValue> | |||
8461 | TargetLowering::LowerCallTo(TargetLowering::CallLoweringInfo &CLI) const { | |||
8462 | // Handle the incoming return values from the call. | |||
8463 | CLI.Ins.clear(); | |||
8464 | Type *OrigRetTy = CLI.RetTy; | |||
8465 | SmallVector<EVT, 4> RetTys; | |||
8466 | SmallVector<uint64_t, 4> Offsets; | |||
8467 | auto &DL = CLI.DAG.getDataLayout(); | |||
8468 | ComputeValueVTs(*this, DL, CLI.RetTy, RetTys, &Offsets); | |||
8469 | ||||
8470 | if (CLI.IsPostTypeLegalization) { | |||
8471 | // If we are lowering a libcall after legalization, split the return type. | |||
8472 | SmallVector<EVT, 4> OldRetTys = std::move(RetTys); | |||
8473 | SmallVector<uint64_t, 4> OldOffsets = std::move(Offsets); | |||
8474 | for (size_t i = 0, e = OldRetTys.size(); i != e; ++i) { | |||
8475 | EVT RetVT = OldRetTys[i]; | |||
8476 | uint64_t Offset = OldOffsets[i]; | |||
8477 | MVT RegisterVT = getRegisterType(CLI.RetTy->getContext(), RetVT); | |||
8478 | unsigned NumRegs = getNumRegisters(CLI.RetTy->getContext(), RetVT); | |||
8479 | unsigned RegisterVTByteSZ = RegisterVT.getSizeInBits() / 8; | |||
8480 | RetTys.append(NumRegs, RegisterVT); | |||
8481 | for (unsigned j = 0; j != NumRegs; ++j) | |||
8482 | Offsets.push_back(Offset + j * RegisterVTByteSZ); | |||
8483 | } | |||
8484 | } | |||
8485 | ||||
8486 | SmallVector<ISD::OutputArg, 4> Outs; | |||
8487 | GetReturnInfo(CLI.CallConv, CLI.RetTy, getReturnAttrs(CLI), Outs, *this, DL); | |||
8488 | ||||
8489 | bool CanLowerReturn = | |||
8490 | this->CanLowerReturn(CLI.CallConv, CLI.DAG.getMachineFunction(), | |||
8491 | CLI.IsVarArg, Outs, CLI.RetTy->getContext()); | |||
8492 | ||||
8493 | SDValue DemoteStackSlot; | |||
8494 | int DemoteStackIdx = -100; | |||
8495 | if (!CanLowerReturn) { | |||
8496 | // FIXME: equivalent assert? | |||
8497 | // assert(!CS.hasInAllocaArgument() && | |||
8498 | // "sret demotion is incompatible with inalloca"); | |||
8499 | uint64_t TySize = DL.getTypeAllocSize(CLI.RetTy); | |||
8500 | unsigned Align = DL.getPrefTypeAlignment(CLI.RetTy); | |||
8501 | MachineFunction &MF = CLI.DAG.getMachineFunction(); | |||
8502 | DemoteStackIdx = MF.getFrameInfo().CreateStackObject(TySize, Align, false); | |||
8503 | Type *StackSlotPtrType = PointerType::get(CLI.RetTy, | |||
8504 | DL.getAllocaAddrSpace()); | |||
8505 | ||||
8506 | DemoteStackSlot = CLI.DAG.getFrameIndex(DemoteStackIdx, getFrameIndexTy(DL)); | |||
8507 | ArgListEntry Entry; | |||
8508 | Entry.Node = DemoteStackSlot; | |||
8509 | Entry.Ty = StackSlotPtrType; | |||
8510 | Entry.IsSExt = false; | |||
8511 | Entry.IsZExt = false; | |||
8512 | Entry.IsInReg = false; | |||
8513 | Entry.IsSRet = true; | |||
8514 | Entry.IsNest = false; | |||
8515 | Entry.IsByVal = false; | |||
8516 | Entry.IsReturned = false; | |||
8517 | Entry.IsSwiftSelf = false; | |||
8518 | Entry.IsSwiftError = false; | |||
8519 | Entry.Alignment = Align; | |||
8520 | CLI.getArgs().insert(CLI.getArgs().begin(), Entry); | |||
8521 | CLI.NumFixedArgs += 1; | |||
8522 | CLI.RetTy = Type::getVoidTy(CLI.RetTy->getContext()); | |||
8523 | ||||
8524 | // sret demotion isn't compatible with tail-calls, since the sret argument | |||
8525 | // points into the callers stack frame. | |||
8526 | CLI.IsTailCall = false; | |||
8527 | } else { | |||
8528 | for (unsigned I = 0, E = RetTys.size(); I != E; ++I) { | |||
8529 | EVT VT = RetTys[I]; | |||
8530 | MVT RegisterVT = getRegisterTypeForCallingConv(CLI.RetTy->getContext(), | |||
8531 | CLI.CallConv, VT); | |||
8532 | unsigned NumRegs = getNumRegistersForCallingConv(CLI.RetTy->getContext(), | |||
8533 | CLI.CallConv, VT); | |||
8534 | for (unsigned i = 0; i != NumRegs; ++i) { | |||
8535 | ISD::InputArg MyFlags; | |||
8536 | MyFlags.VT = RegisterVT; | |||
8537 | MyFlags.ArgVT = VT; | |||
8538 | MyFlags.Used = CLI.IsReturnValueUsed; | |||
8539 | if (CLI.RetSExt) | |||
8540 | MyFlags.Flags.setSExt(); | |||
8541 | if (CLI.RetZExt) | |||
8542 | MyFlags.Flags.setZExt(); | |||
8543 | if (CLI.IsInReg) | |||
8544 | MyFlags.Flags.setInReg(); | |||
8545 | CLI.Ins.push_back(MyFlags); | |||
8546 | } | |||
8547 | } | |||
8548 | } | |||
8549 | ||||
8550 | // We push in swifterror return as the last element of CLI.Ins. | |||
8551 | ArgListTy &Args = CLI.getArgs(); | |||
8552 | if (supportSwiftError()) { | |||
8553 | for (unsigned i = 0, e = Args.size(); i != e; ++i) { | |||
8554 | if (Args[i].IsSwiftError) { | |||
8555 | ISD::InputArg MyFlags; | |||
8556 | MyFlags.VT = getPointerTy(DL); | |||
8557 | MyFlags.ArgVT = EVT(getPointerTy(DL)); | |||
8558 | MyFlags.Flags.setSwiftError(); | |||
8559 | CLI.Ins.push_back(MyFlags); | |||
8560 | } | |||
8561 | } | |||
8562 | } | |||
8563 | ||||
8564 | // Handle all of the outgoing arguments. | |||
8565 | CLI.Outs.clear(); | |||
8566 | CLI.OutVals.clear(); | |||
8567 | for (unsigned i = 0, e = Args.size(); i != e; ++i) { | |||
8568 | SmallVector<EVT, 4> ValueVTs; | |||
8569 | ComputeValueVTs(*this, DL, Args[i].Ty, ValueVTs); | |||
8570 | // FIXME: Split arguments if CLI.IsPostTypeLegalization | |||
8571 | Type *FinalType = Args[i].Ty; | |||
8572 | if (Args[i].IsByVal) | |||
8573 | FinalType = cast<PointerType>(Args[i].Ty)->getElementType(); | |||
8574 | bool NeedsRegBlock = functionArgumentNeedsConsecutiveRegisters( | |||
8575 | FinalType, CLI.CallConv, CLI.IsVarArg); | |||
8576 | for (unsigned Value = 0, NumValues = ValueVTs.size(); Value != NumValues; | |||
8577 | ++Value) { | |||
8578 | EVT VT = ValueVTs[Value]; | |||
8579 | Type *ArgTy = VT.getTypeForEVT(CLI.RetTy->getContext()); | |||
8580 | SDValue Op = SDValue(Args[i].Node.getNode(), | |||
8581 | Args[i].Node.getResNo() + Value); | |||
8582 | ISD::ArgFlagsTy Flags; | |||
8583 | ||||
8584 | // Certain targets (such as MIPS), may have a different ABI alignment | |||
8585 | // for a type depending on the context. Give the target a chance to | |||
8586 | // specify the alignment it wants. | |||
8587 | unsigned OriginalAlignment = getABIAlignmentForCallingConv(ArgTy, DL); | |||
8588 | ||||
8589 | if (Args[i].IsZExt) | |||
8590 | Flags.setZExt(); | |||
8591 | if (Args[i].IsSExt) | |||
8592 | Flags.setSExt(); | |||
8593 | if (Args[i].IsInReg) { | |||
8594 | // If we are using vectorcall calling convention, a structure that is | |||
8595 | // passed InReg - is surely an HVA | |||
8596 | if (CLI.CallConv == CallingConv::X86_VectorCall && | |||
8597 | isa<StructType>(FinalType)) { | |||
8598 | // The first value of a structure is marked | |||
8599 | if (0 == Value) | |||
8600 | Flags.setHvaStart(); | |||
8601 | Flags.setHva(); | |||
8602 | } | |||
8603 | // Set InReg Flag | |||
8604 | Flags.setInReg(); | |||
8605 | } | |||
8606 | if (Args[i].IsSRet) | |||
8607 | Flags.setSRet(); | |||
8608 | if (Args[i].IsSwiftSelf) | |||
8609 | Flags.setSwiftSelf(); | |||
8610 | if (Args[i].IsSwiftError) | |||
8611 | Flags.setSwiftError(); | |||
8612 | if (Args[i].IsByVal) | |||
8613 | Flags.setByVal(); | |||
8614 | if (Args[i].IsInAlloca) { | |||
8615 | Flags.setInAlloca(); | |||
8616 | // Set the byval flag for CCAssignFn callbacks that don't know about | |||
8617 | // inalloca. This way we can know how many bytes we should've allocated | |||
8618 | // and how many bytes a callee cleanup function will pop. If we port | |||
8619 | // inalloca to more targets, we'll have to add custom inalloca handling | |||
8620 | // in the various CC lowering callbacks. | |||
8621 | Flags.setByVal(); | |||
8622 | } | |||
8623 | if (Args[i].IsByVal || Args[i].IsInAlloca) { | |||
8624 | PointerType *Ty = cast<PointerType>(Args[i].Ty); | |||
8625 | Type *ElementTy = Ty->getElementType(); | |||
8626 | Flags.setByValSize(DL.getTypeAllocSize(ElementTy)); | |||
8627 | // For ByVal, alignment should come from FE. BE will guess if this | |||
8628 | // info is not there but there are cases it cannot get right. | |||
8629 | unsigned FrameAlign; | |||
8630 | if (Args[i].Alignment) | |||
8631 | FrameAlign = Args[i].Alignment; | |||
8632 | else | |||
8633 | FrameAlign = getByValTypeAlignment(ElementTy, DL); | |||
8634 | Flags.setByValAlign(FrameAlign); | |||
8635 | } | |||
8636 | if (Args[i].IsNest) | |||
8637 | Flags.setNest(); | |||
8638 | if (NeedsRegBlock) | |||
8639 | Flags.setInConsecutiveRegs(); | |||
8640 | Flags.setOrigAlign(OriginalAlignment); | |||
8641 | ||||
8642 | MVT PartVT = getRegisterTypeForCallingConv(CLI.RetTy->getContext(), | |||
8643 | CLI.CallConv, VT); | |||
8644 | unsigned NumParts = getNumRegistersForCallingConv(CLI.RetTy->getContext(), | |||
8645 | CLI.CallConv, VT); | |||
8646 | SmallVector<SDValue, 4> Parts(NumParts); | |||
8647 | ISD::NodeType ExtendKind = ISD::ANY_EXTEND; | |||
8648 | ||||
8649 | if (Args[i].IsSExt) | |||
8650 | ExtendKind = ISD::SIGN_EXTEND; | |||
8651 | else if (Args[i].IsZExt) | |||
8652 | ExtendKind = ISD::ZERO_EXTEND; | |||
8653 | ||||
8654 | // Conservatively only handle 'returned' on non-vectors that can be lowered, | |||
8655 | // for now. | |||
8656 | if (Args[i].IsReturned && !Op.getValueType().isVector() && | |||
8657 | CanLowerReturn) { | |||
8658 | assert(CLI.RetTy == Args[i].Ty && RetTys.size() == NumValues &&((CLI.RetTy == Args[i].Ty && RetTys.size() == NumValues && "unexpected use of 'returned'") ? static_cast< void> (0) : __assert_fail ("CLI.RetTy == Args[i].Ty && RetTys.size() == NumValues && \"unexpected use of 'returned'\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 8659, __PRETTY_FUNCTION__)) | |||
8659 | "unexpected use of 'returned'")((CLI.RetTy == Args[i].Ty && RetTys.size() == NumValues && "unexpected use of 'returned'") ? static_cast< void> (0) : __assert_fail ("CLI.RetTy == Args[i].Ty && RetTys.size() == NumValues && \"unexpected use of 'returned'\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 8659, __PRETTY_FUNCTION__)); | |||
8660 | // Before passing 'returned' to the target lowering code, ensure that | |||
8661 | // either the register MVT and the actual EVT are the same size or that | |||
8662 | // the return value and argument are extended in the same way; in these | |||
8663 | // cases it's safe to pass the argument register value unchanged as the | |||
8664 | // return register value (although it's at the target's option whether | |||
8665 | // to do so) | |||
8666 | // TODO: allow code generation to take advantage of partially preserved | |||
8667 | // registers rather than clobbering the entire register when the | |||
8668 | // parameter extension method is not compatible with the return | |||
8669 | // extension method | |||
8670 | if ((NumParts * PartVT.getSizeInBits() == VT.getSizeInBits()) || | |||
8671 | (ExtendKind != ISD::ANY_EXTEND && CLI.RetSExt == Args[i].IsSExt && | |||
8672 | CLI.RetZExt == Args[i].IsZExt)) | |||
8673 | Flags.setReturned(); | |||
8674 | } | |||
8675 | ||||
8676 | getCopyToParts(CLI.DAG, CLI.DL, Op, &Parts[0], NumParts, PartVT, | |||
8677 | CLI.CS.getInstruction(), CLI.CallConv, ExtendKind); | |||
8678 | ||||
8679 | for (unsigned j = 0; j != NumParts; ++j) { | |||
8680 | // if it isn't first piece, alignment must be 1 | |||
8681 | ISD::OutputArg MyFlags(Flags, Parts[j].getValueType(), VT, | |||
8682 | i < CLI.NumFixedArgs, | |||
8683 | i, j*Parts[j].getValueType().getStoreSize()); | |||
8684 | if (NumParts > 1 && j == 0) | |||
8685 | MyFlags.Flags.setSplit(); | |||
8686 | else if (j != 0) { | |||
8687 | MyFlags.Flags.setOrigAlign(1); | |||
8688 | if (j == NumParts - 1) | |||
8689 | MyFlags.Flags.setSplitEnd(); | |||
8690 | } | |||
8691 | ||||
8692 | CLI.Outs.push_back(MyFlags); | |||
8693 | CLI.OutVals.push_back(Parts[j]); | |||
8694 | } | |||
8695 | ||||
8696 | if (NeedsRegBlock && Value == NumValues - 1) | |||
8697 | CLI.Outs[CLI.Outs.size() - 1].Flags.setInConsecutiveRegsLast(); | |||
8698 | } | |||
8699 | } | |||
8700 | ||||
8701 | SmallVector<SDValue, 4> InVals; | |||
8702 | CLI.Chain = LowerCall(CLI, InVals); | |||
8703 | ||||
8704 | // Update CLI.InVals to use outside of this function. | |||
8705 | CLI.InVals = InVals; | |||
8706 | ||||
8707 | // Verify that the target's LowerCall behaved as expected. | |||
8708 | assert(CLI.Chain.getNode() && CLI.Chain.getValueType() == MVT::Other &&((CLI.Chain.getNode() && CLI.Chain.getValueType() == MVT ::Other && "LowerCall didn't return a valid chain!") ? static_cast<void> (0) : __assert_fail ("CLI.Chain.getNode() && CLI.Chain.getValueType() == MVT::Other && \"LowerCall didn't return a valid chain!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 8709, __PRETTY_FUNCTION__)) | |||
8709 | "LowerCall didn't return a valid chain!")((CLI.Chain.getNode() && CLI.Chain.getValueType() == MVT ::Other && "LowerCall didn't return a valid chain!") ? static_cast<void> (0) : __assert_fail ("CLI.Chain.getNode() && CLI.Chain.getValueType() == MVT::Other && \"LowerCall didn't return a valid chain!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 8709, __PRETTY_FUNCTION__)); | |||
8710 | assert((!CLI.IsTailCall || InVals.empty()) &&(((!CLI.IsTailCall || InVals.empty()) && "LowerCall emitted a return value for a tail call!" ) ? static_cast<void> (0) : __assert_fail ("(!CLI.IsTailCall || InVals.empty()) && \"LowerCall emitted a return value for a tail call!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 8711, __PRETTY_FUNCTION__)) | |||
8711 | "LowerCall emitted a return value for a tail call!")(((!CLI.IsTailCall || InVals.empty()) && "LowerCall emitted a return value for a tail call!" ) ? static_cast<void> (0) : __assert_fail ("(!CLI.IsTailCall || InVals.empty()) && \"LowerCall emitted a return value for a tail call!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 8711, __PRETTY_FUNCTION__)); | |||
8712 | assert((CLI.IsTailCall || InVals.size() == CLI.Ins.size()) &&(((CLI.IsTailCall || InVals.size() == CLI.Ins.size()) && "LowerCall didn't emit the correct number of values!") ? static_cast <void> (0) : __assert_fail ("(CLI.IsTailCall || InVals.size() == CLI.Ins.size()) && \"LowerCall didn't emit the correct number of values!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 8713, __PRETTY_FUNCTION__)) | |||
8713 | "LowerCall didn't emit the correct number of values!")(((CLI.IsTailCall || InVals.size() == CLI.Ins.size()) && "LowerCall didn't emit the correct number of values!") ? static_cast <void> (0) : __assert_fail ("(CLI.IsTailCall || InVals.size() == CLI.Ins.size()) && \"LowerCall didn't emit the correct number of values!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 8713, __PRETTY_FUNCTION__)); | |||
8714 | ||||
8715 | // For a tail call, the return value is merely live-out and there aren't | |||
8716 | // any nodes in the DAG representing it. Return a special value to | |||
8717 | // indicate that a tail call has been emitted and no more Instructions | |||
8718 | // should be processed in the current block. | |||
8719 | if (CLI.IsTailCall) { | |||
8720 | CLI.DAG.setRoot(CLI.Chain); | |||
8721 | return std::make_pair(SDValue(), SDValue()); | |||
8722 | } | |||
8723 | ||||
8724 | #ifndef NDEBUG | |||
8725 | for (unsigned i = 0, e = CLI.Ins.size(); i != e; ++i) { | |||
8726 | assert(InVals[i].getNode() && "LowerCall emitted a null value!")((InVals[i].getNode() && "LowerCall emitted a null value!" ) ? static_cast<void> (0) : __assert_fail ("InVals[i].getNode() && \"LowerCall emitted a null value!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 8726, __PRETTY_FUNCTION__)); | |||
8727 | assert(EVT(CLI.Ins[i].VT) == InVals[i].getValueType() &&((EVT(CLI.Ins[i].VT) == InVals[i].getValueType() && "LowerCall emitted a value with the wrong type!" ) ? static_cast<void> (0) : __assert_fail ("EVT(CLI.Ins[i].VT) == InVals[i].getValueType() && \"LowerCall emitted a value with the wrong type!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 8728, __PRETTY_FUNCTION__)) | |||
8728 | "LowerCall emitted a value with the wrong type!")((EVT(CLI.Ins[i].VT) == InVals[i].getValueType() && "LowerCall emitted a value with the wrong type!" ) ? static_cast<void> (0) : __assert_fail ("EVT(CLI.Ins[i].VT) == InVals[i].getValueType() && \"LowerCall emitted a value with the wrong type!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 8728, __PRETTY_FUNCTION__)); | |||
8729 | } | |||
8730 | #endif | |||
8731 | ||||
8732 | SmallVector<SDValue, 4> ReturnValues; | |||
8733 | if (!CanLowerReturn) { | |||
8734 | // The instruction result is the result of loading from the | |||
8735 | // hidden sret parameter. | |||
8736 | SmallVector<EVT, 1> PVTs; | |||
8737 | Type *PtrRetTy = OrigRetTy->getPointerTo(DL.getAllocaAddrSpace()); | |||
8738 | ||||
8739 | ComputeValueVTs(*this, DL, PtrRetTy, PVTs); | |||
8740 | assert(PVTs.size() == 1 && "Pointers should fit in one register")((PVTs.size() == 1 && "Pointers should fit in one register" ) ? static_cast<void> (0) : __assert_fail ("PVTs.size() == 1 && \"Pointers should fit in one register\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 8740, __PRETTY_FUNCTION__)); | |||
8741 | EVT PtrVT = PVTs[0]; | |||
8742 | ||||
8743 | unsigned NumValues = RetTys.size(); | |||
8744 | ReturnValues.resize(NumValues); | |||
8745 | SmallVector<SDValue, 4> Chains(NumValues); | |||
8746 | ||||
8747 | // An aggregate return value cannot wrap around the address space, so | |||
8748 | // offsets to its parts don't wrap either. | |||
8749 | SDNodeFlags Flags; | |||
8750 | Flags.setNoUnsignedWrap(true); | |||
8751 | ||||
8752 | for (unsigned i = 0; i < NumValues; ++i) { | |||
8753 | SDValue Add = CLI.DAG.getNode(ISD::ADD, CLI.DL, PtrVT, DemoteStackSlot, | |||
8754 | CLI.DAG.getConstant(Offsets[i], CLI.DL, | |||
8755 | PtrVT), Flags); | |||
8756 | SDValue L = CLI.DAG.getLoad( | |||
8757 | RetTys[i], CLI.DL, CLI.Chain, Add, | |||
8758 | MachinePointerInfo::getFixedStack(CLI.DAG.getMachineFunction(), | |||
8759 | DemoteStackIdx, Offsets[i]), | |||
8760 | /* Alignment = */ 1); | |||
8761 | ReturnValues[i] = L; | |||
8762 | Chains[i] = L.getValue(1); | |||
8763 | } | |||
8764 | ||||
8765 | CLI.Chain = CLI.DAG.getNode(ISD::TokenFactor, CLI.DL, MVT::Other, Chains); | |||
8766 | } else { | |||
8767 | // Collect the legal value parts into potentially illegal values | |||
8768 | // that correspond to the original function's return values. | |||
8769 | Optional<ISD::NodeType> AssertOp; | |||
8770 | if (CLI.RetSExt) | |||
8771 | AssertOp = ISD::AssertSext; | |||
8772 | else if (CLI.RetZExt) | |||
8773 | AssertOp = ISD::AssertZext; | |||
8774 | unsigned CurReg = 0; | |||
8775 | for (unsigned I = 0, E = RetTys.size(); I != E; ++I) { | |||
8776 | EVT VT = RetTys[I]; | |||
8777 | MVT RegisterVT = getRegisterTypeForCallingConv(CLI.RetTy->getContext(), | |||
8778 | CLI.CallConv, VT); | |||
8779 | unsigned NumRegs = getNumRegistersForCallingConv(CLI.RetTy->getContext(), | |||
8780 | CLI.CallConv, VT); | |||
8781 | ||||
8782 | ReturnValues.push_back(getCopyFromParts(CLI.DAG, CLI.DL, &InVals[CurReg], | |||
8783 | NumRegs, RegisterVT, VT, nullptr, | |||
8784 | CLI.CallConv, AssertOp)); | |||
8785 | CurReg += NumRegs; | |||
8786 | } | |||
8787 | ||||
8788 | // For a function returning void, there is no return value. We can't create | |||
8789 | // such a node, so we just return a null return value in that case. In | |||
8790 | // that case, nothing will actually look at the value. | |||
8791 | if (ReturnValues.empty()) | |||
8792 | return std::make_pair(SDValue(), CLI.Chain); | |||
8793 | } | |||
8794 | ||||
8795 | SDValue Res = CLI.DAG.getNode(ISD::MERGE_VALUES, CLI.DL, | |||
8796 | CLI.DAG.getVTList(RetTys), ReturnValues); | |||
8797 | return std::make_pair(Res, CLI.Chain); | |||
8798 | } | |||
8799 | ||||
8800 | void TargetLowering::LowerOperationWrapper(SDNode *N, | |||
8801 | SmallVectorImpl<SDValue> &Results, | |||
8802 | SelectionDAG &DAG) const { | |||
8803 | if (SDValue Res = LowerOperation(SDValue(N, 0), DAG)) | |||
8804 | Results.push_back(Res); | |||
8805 | } | |||
8806 | ||||
8807 | SDValue TargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const { | |||
8808 | llvm_unreachable("LowerOperation not implemented for this target!")::llvm::llvm_unreachable_internal("LowerOperation not implemented for this target!" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 8808); | |||
8809 | } | |||
8810 | ||||
8811 | void | |||
8812 | SelectionDAGBuilder::CopyValueToVirtualRegister(const Value *V, unsigned Reg) { | |||
8813 | SDValue Op = getNonRegisterValue(V); | |||
8814 | assert((Op.getOpcode() != ISD::CopyFromReg ||(((Op.getOpcode() != ISD::CopyFromReg || cast<RegisterSDNode >(Op.getOperand(1))->getReg() != Reg) && "Copy from a reg to the same reg!" ) ? static_cast<void> (0) : __assert_fail ("(Op.getOpcode() != ISD::CopyFromReg || cast<RegisterSDNode>(Op.getOperand(1))->getReg() != Reg) && \"Copy from a reg to the same reg!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 8816, __PRETTY_FUNCTION__)) | |||
8815 | cast<RegisterSDNode>(Op.getOperand(1))->getReg() != Reg) &&(((Op.getOpcode() != ISD::CopyFromReg || cast<RegisterSDNode >(Op.getOperand(1))->getReg() != Reg) && "Copy from a reg to the same reg!" ) ? static_cast<void> (0) : __assert_fail ("(Op.getOpcode() != ISD::CopyFromReg || cast<RegisterSDNode>(Op.getOperand(1))->getReg() != Reg) && \"Copy from a reg to the same reg!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 8816, __PRETTY_FUNCTION__)) | |||
8816 | "Copy from a reg to the same reg!")(((Op.getOpcode() != ISD::CopyFromReg || cast<RegisterSDNode >(Op.getOperand(1))->getReg() != Reg) && "Copy from a reg to the same reg!" ) ? static_cast<void> (0) : __assert_fail ("(Op.getOpcode() != ISD::CopyFromReg || cast<RegisterSDNode>(Op.getOperand(1))->getReg() != Reg) && \"Copy from a reg to the same reg!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 8816, __PRETTY_FUNCTION__)); | |||
8817 | assert(!TargetRegisterInfo::isPhysicalRegister(Reg) && "Is a physreg")((!TargetRegisterInfo::isPhysicalRegister(Reg) && "Is a physreg" ) ? static_cast<void> (0) : __assert_fail ("!TargetRegisterInfo::isPhysicalRegister(Reg) && \"Is a physreg\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 8817, __PRETTY_FUNCTION__)); | |||
8818 | ||||
8819 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
8820 | // If this is an InlineAsm we have to match the registers required, not the | |||
8821 | // notional registers required by the type. | |||
8822 | ||||
8823 | RegsForValue RFV(V->getContext(), TLI, DAG.getDataLayout(), Reg, V->getType(), | |||
8824 | None); // This is not an ABI copy. | |||
8825 | SDValue Chain = DAG.getEntryNode(); | |||
8826 | ||||
8827 | ISD::NodeType ExtendType = (FuncInfo.PreferredExtendType.find(V) == | |||
8828 | FuncInfo.PreferredExtendType.end()) | |||
8829 | ? ISD::ANY_EXTEND | |||
8830 | : FuncInfo.PreferredExtendType[V]; | |||
8831 | RFV.getCopyToRegs(Op, DAG, getCurSDLoc(), Chain, nullptr, V, ExtendType); | |||
8832 | PendingExports.push_back(Chain); | |||
8833 | } | |||
8834 | ||||
8835 | #include "llvm/CodeGen/SelectionDAGISel.h" | |||
8836 | ||||
8837 | /// isOnlyUsedInEntryBlock - If the specified argument is only used in the | |||
8838 | /// entry block, return true. This includes arguments used by switches, since | |||
8839 | /// the switch may expand into multiple basic blocks. | |||
8840 | static bool isOnlyUsedInEntryBlock(const Argument *A, bool FastISel) { | |||
8841 | // With FastISel active, we may be splitting blocks, so force creation | |||
8842 | // of virtual registers for all non-dead arguments. | |||
8843 | if (FastISel) | |||
8844 | return A->use_empty(); | |||
8845 | ||||
8846 | const BasicBlock &Entry = A->getParent()->front(); | |||
8847 | for (const User *U : A->users()) | |||
8848 | if (cast<Instruction>(U)->getParent() != &Entry || isa<SwitchInst>(U)) | |||
8849 | return false; // Use not in entry block. | |||
8850 | ||||
8851 | return true; | |||
8852 | } | |||
8853 | ||||
8854 | using ArgCopyElisionMapTy = | |||
8855 | DenseMap<const Argument *, | |||
8856 | std::pair<const AllocaInst *, const StoreInst *>>; | |||
8857 | ||||
8858 | /// Scan the entry block of the function in FuncInfo for arguments that look | |||
8859 | /// like copies into a local alloca. Record any copied arguments in | |||
8860 | /// ArgCopyElisionCandidates. | |||
8861 | static void | |||
8862 | findArgumentCopyElisionCandidates(const DataLayout &DL, | |||
8863 | FunctionLoweringInfo *FuncInfo, | |||
8864 | ArgCopyElisionMapTy &ArgCopyElisionCandidates) { | |||
8865 | // Record the state of every static alloca used in the entry block. Argument | |||
8866 | // allocas are all used in the entry block, so we need approximately as many | |||
8867 | // entries as we have arguments. | |||
8868 | enum StaticAllocaInfo { Unknown, Clobbered, Elidable }; | |||
8869 | SmallDenseMap<const AllocaInst *, StaticAllocaInfo, 8> StaticAllocas; | |||
8870 | unsigned NumArgs = FuncInfo->Fn->arg_size(); | |||
8871 | StaticAllocas.reserve(NumArgs * 2); | |||
8872 | ||||
8873 | auto GetInfoIfStaticAlloca = [&](const Value *V) -> StaticAllocaInfo * { | |||
8874 | if (!V) | |||
8875 | return nullptr; | |||
8876 | V = V->stripPointerCasts(); | |||
8877 | const auto *AI = dyn_cast<AllocaInst>(V); | |||
8878 | if (!AI || !AI->isStaticAlloca() || !FuncInfo->StaticAllocaMap.count(AI)) | |||
8879 | return nullptr; | |||
8880 | auto Iter = StaticAllocas.insert({AI, Unknown}); | |||
8881 | return &Iter.first->second; | |||
8882 | }; | |||
8883 | ||||
8884 | // Look for stores of arguments to static allocas. Look through bitcasts and | |||
8885 | // GEPs to handle type coercions, as long as the alloca is fully initialized | |||
8886 | // by the store. Any non-store use of an alloca escapes it and any subsequent | |||
8887 | // unanalyzed store might write it. | |||
8888 | // FIXME: Handle structs initialized with multiple stores. | |||
8889 | for (const Instruction &I : FuncInfo->Fn->getEntryBlock()) { | |||
8890 | // Look for stores, and handle non-store uses conservatively. | |||
8891 | const auto *SI = dyn_cast<StoreInst>(&I); | |||
8892 | if (!SI) { | |||
8893 | // We will look through cast uses, so ignore them completely. | |||
8894 | if (I.isCast()) | |||
8895 | continue; | |||
8896 | // Ignore debug info intrinsics, they don't escape or store to allocas. | |||
8897 | if (isa<DbgInfoIntrinsic>(I)) | |||
8898 | continue; | |||
8899 | // This is an unknown instruction. Assume it escapes or writes to all | |||
8900 | // static alloca operands. | |||
8901 | for (const Use &U : I.operands()) { | |||
8902 | if (StaticAllocaInfo *Info = GetInfoIfStaticAlloca(U)) | |||
8903 | *Info = StaticAllocaInfo::Clobbered; | |||
8904 | } | |||
8905 | continue; | |||
8906 | } | |||
8907 | ||||
8908 | // If the stored value is a static alloca, mark it as escaped. | |||
8909 | if (StaticAllocaInfo *Info = GetInfoIfStaticAlloca(SI->getValueOperand())) | |||
8910 | *Info = StaticAllocaInfo::Clobbered; | |||
8911 | ||||
8912 | // Check if the destination is a static alloca. | |||
8913 | const Value *Dst = SI->getPointerOperand()->stripPointerCasts(); | |||
8914 | StaticAllocaInfo *Info = GetInfoIfStaticAlloca(Dst); | |||
8915 | if (!Info) | |||
8916 | continue; | |||
8917 | const AllocaInst *AI = cast<AllocaInst>(Dst); | |||
8918 | ||||
8919 | // Skip allocas that have been initialized or clobbered. | |||
8920 | if (*Info != StaticAllocaInfo::Unknown) | |||
8921 | continue; | |||
8922 | ||||
8923 | // Check if the stored value is an argument, and that this store fully | |||
8924 | // initializes the alloca. Don't elide copies from the same argument twice. | |||
8925 | const Value *Val = SI->getValueOperand()->stripPointerCasts(); | |||
8926 | const auto *Arg = dyn_cast<Argument>(Val); | |||
8927 | if (!Arg || Arg->hasInAllocaAttr() || Arg->hasByValAttr() || | |||
8928 | Arg->getType()->isEmptyTy() || | |||
8929 | DL.getTypeStoreSize(Arg->getType()) != | |||
8930 | DL.getTypeAllocSize(AI->getAllocatedType()) || | |||
8931 | ArgCopyElisionCandidates.count(Arg)) { | |||
8932 | *Info = StaticAllocaInfo::Clobbered; | |||
8933 | continue; | |||
8934 | } | |||
8935 | ||||
8936 | LLVM_DEBUG(dbgs() << "Found argument copy elision candidate: " << *AIdo { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { dbgs() << "Found argument copy elision candidate: " << *AI << '\n'; } } while (false) | |||
8937 | << '\n')do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { dbgs() << "Found argument copy elision candidate: " << *AI << '\n'; } } while (false); | |||
8938 | ||||
8939 | // Mark this alloca and store for argument copy elision. | |||
8940 | *Info = StaticAllocaInfo::Elidable; | |||
8941 | ArgCopyElisionCandidates.insert({Arg, {AI, SI}}); | |||
8942 | ||||
8943 | // Stop scanning if we've seen all arguments. This will happen early in -O0 | |||
8944 | // builds, which is useful, because -O0 builds have large entry blocks and | |||
8945 | // many allocas. | |||
8946 | if (ArgCopyElisionCandidates.size() == NumArgs) | |||
8947 | break; | |||
8948 | } | |||
8949 | } | |||
8950 | ||||
8951 | /// Try to elide argument copies from memory into a local alloca. Succeeds if | |||
8952 | /// ArgVal is a load from a suitable fixed stack object. | |||
8953 | static void tryToElideArgumentCopy( | |||
8954 | FunctionLoweringInfo *FuncInfo, SmallVectorImpl<SDValue> &Chains, | |||
8955 | DenseMap<int, int> &ArgCopyElisionFrameIndexMap, | |||
8956 | SmallPtrSetImpl<const Instruction *> &ElidedArgCopyInstrs, | |||
8957 | ArgCopyElisionMapTy &ArgCopyElisionCandidates, const Argument &Arg, | |||
8958 | SDValue ArgVal, bool &ArgHasUses) { | |||
8959 | // Check if this is a load from a fixed stack object. | |||
8960 | auto *LNode = dyn_cast<LoadSDNode>(ArgVal); | |||
8961 | if (!LNode) | |||
8962 | return; | |||
8963 | auto *FINode = dyn_cast<FrameIndexSDNode>(LNode->getBasePtr().getNode()); | |||
8964 | if (!FINode) | |||
8965 | return; | |||
8966 | ||||
8967 | // Check that the fixed stack object is the right size and alignment. | |||
8968 | // Look at the alignment that the user wrote on the alloca instead of looking | |||
8969 | // at the stack object. | |||
8970 | auto ArgCopyIter = ArgCopyElisionCandidates.find(&Arg); | |||
8971 | assert(ArgCopyIter != ArgCopyElisionCandidates.end())((ArgCopyIter != ArgCopyElisionCandidates.end()) ? static_cast <void> (0) : __assert_fail ("ArgCopyIter != ArgCopyElisionCandidates.end()" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 8971, __PRETTY_FUNCTION__)); | |||
8972 | const AllocaInst *AI = ArgCopyIter->second.first; | |||
8973 | int FixedIndex = FINode->getIndex(); | |||
8974 | int &AllocaIndex = FuncInfo->StaticAllocaMap[AI]; | |||
8975 | int OldIndex = AllocaIndex; | |||
8976 | MachineFrameInfo &MFI = FuncInfo->MF->getFrameInfo(); | |||
8977 | if (MFI.getObjectSize(FixedIndex) != MFI.getObjectSize(OldIndex)) { | |||
8978 | LLVM_DEBUG(do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { dbgs() << " argument copy elision failed due to bad fixed stack " "object size\n"; } } while (false) | |||
8979 | dbgs() << " argument copy elision failed due to bad fixed stack "do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { dbgs() << " argument copy elision failed due to bad fixed stack " "object size\n"; } } while (false) | |||
8980 | "object size\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { dbgs() << " argument copy elision failed due to bad fixed stack " "object size\n"; } } while (false); | |||
8981 | return; | |||
8982 | } | |||
8983 | unsigned RequiredAlignment = AI->getAlignment(); | |||
8984 | if (!RequiredAlignment) { | |||
8985 | RequiredAlignment = FuncInfo->MF->getDataLayout().getABITypeAlignment( | |||
8986 | AI->getAllocatedType()); | |||
8987 | } | |||
8988 | if (MFI.getObjectAlignment(FixedIndex) < RequiredAlignment) { | |||
8989 | LLVM_DEBUG(dbgs() << " argument copy elision failed: alignment of alloca "do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { dbgs() << " argument copy elision failed: alignment of alloca " "greater than stack argument alignment (" << RequiredAlignment << " vs " << MFI.getObjectAlignment(FixedIndex) << ")\n"; } } while (false) | |||
8990 | "greater than stack argument alignment ("do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { dbgs() << " argument copy elision failed: alignment of alloca " "greater than stack argument alignment (" << RequiredAlignment << " vs " << MFI.getObjectAlignment(FixedIndex) << ")\n"; } } while (false) | |||
8991 | << RequiredAlignment << " vs "do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { dbgs() << " argument copy elision failed: alignment of alloca " "greater than stack argument alignment (" << RequiredAlignment << " vs " << MFI.getObjectAlignment(FixedIndex) << ")\n"; } } while (false) | |||
8992 | << MFI.getObjectAlignment(FixedIndex) << ")\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { dbgs() << " argument copy elision failed: alignment of alloca " "greater than stack argument alignment (" << RequiredAlignment << " vs " << MFI.getObjectAlignment(FixedIndex) << ")\n"; } } while (false); | |||
8993 | return; | |||
8994 | } | |||
8995 | ||||
8996 | // Perform the elision. Delete the old stack object and replace its only use | |||
8997 | // in the variable info map. Mark the stack object as mutable. | |||
8998 | LLVM_DEBUG({do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { { dbgs() << "Eliding argument copy from " << Arg << " to " << *AI << '\n' << " Replacing frame index " << OldIndex << " with " << FixedIndex << '\n'; }; } } while (false) | |||
8999 | dbgs() << "Eliding argument copy from " << Arg << " to " << *AI << '\n'do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { { dbgs() << "Eliding argument copy from " << Arg << " to " << *AI << '\n' << " Replacing frame index " << OldIndex << " with " << FixedIndex << '\n'; }; } } while (false) | |||
9000 | << " Replacing frame index " << OldIndex << " with " << FixedIndexdo { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { { dbgs() << "Eliding argument copy from " << Arg << " to " << *AI << '\n' << " Replacing frame index " << OldIndex << " with " << FixedIndex << '\n'; }; } } while (false) | |||
9001 | << '\n';do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { { dbgs() << "Eliding argument copy from " << Arg << " to " << *AI << '\n' << " Replacing frame index " << OldIndex << " with " << FixedIndex << '\n'; }; } } while (false) | |||
9002 | })do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { { dbgs() << "Eliding argument copy from " << Arg << " to " << *AI << '\n' << " Replacing frame index " << OldIndex << " with " << FixedIndex << '\n'; }; } } while (false); | |||
9003 | MFI.RemoveStackObject(OldIndex); | |||
9004 | MFI.setIsImmutableObjectIndex(FixedIndex, false); | |||
9005 | AllocaIndex = FixedIndex; | |||
9006 | ArgCopyElisionFrameIndexMap.insert({OldIndex, FixedIndex}); | |||
9007 | Chains.push_back(ArgVal.getValue(1)); | |||
9008 | ||||
9009 | // Avoid emitting code for the store implementing the copy. | |||
9010 | const StoreInst *SI = ArgCopyIter->second.second; | |||
9011 | ElidedArgCopyInstrs.insert(SI); | |||
9012 | ||||
9013 | // Check for uses of the argument again so that we can avoid exporting ArgVal | |||
9014 | // if it is't used by anything other than the store. | |||
9015 | for (const Value *U : Arg.users()) { | |||
9016 | if (U != SI) { | |||
9017 | ArgHasUses = true; | |||
9018 | break; | |||
9019 | } | |||
9020 | } | |||
9021 | } | |||
9022 | ||||
9023 | void SelectionDAGISel::LowerArguments(const Function &F) { | |||
9024 | SelectionDAG &DAG = SDB->DAG; | |||
9025 | SDLoc dl = SDB->getCurSDLoc(); | |||
9026 | const DataLayout &DL = DAG.getDataLayout(); | |||
9027 | SmallVector<ISD::InputArg, 16> Ins; | |||
9028 | ||||
9029 | if (!FuncInfo->CanLowerReturn) { | |||
9030 | // Put in an sret pointer parameter before all the other parameters. | |||
9031 | SmallVector<EVT, 1> ValueVTs; | |||
9032 | ComputeValueVTs(*TLI, DAG.getDataLayout(), | |||
9033 | F.getReturnType()->getPointerTo( | |||
9034 | DAG.getDataLayout().getAllocaAddrSpace()), | |||
9035 | ValueVTs); | |||
9036 | ||||
9037 | // NOTE: Assuming that a pointer will never break down to more than one VT | |||
9038 | // or one register. | |||
9039 | ISD::ArgFlagsTy Flags; | |||
9040 | Flags.setSRet(); | |||
9041 | MVT RegisterVT = TLI->getRegisterType(*DAG.getContext(), ValueVTs[0]); | |||
9042 | ISD::InputArg RetArg(Flags, RegisterVT, ValueVTs[0], true, | |||
9043 | ISD::InputArg::NoArgIndex, 0); | |||
9044 | Ins.push_back(RetArg); | |||
9045 | } | |||
9046 | ||||
9047 | // Look for stores of arguments to static allocas. Mark such arguments with a | |||
9048 | // flag to ask the target to give us the memory location of that argument if | |||
9049 | // available. | |||
9050 | ArgCopyElisionMapTy ArgCopyElisionCandidates; | |||
9051 | findArgumentCopyElisionCandidates(DL, FuncInfo, ArgCopyElisionCandidates); | |||
9052 | ||||
9053 | // Set up the incoming argument description vector. | |||
9054 | for (const Argument &Arg : F.args()) { | |||
9055 | unsigned ArgNo = Arg.getArgNo(); | |||
9056 | SmallVector<EVT, 4> ValueVTs; | |||
9057 | ComputeValueVTs(*TLI, DAG.getDataLayout(), Arg.getType(), ValueVTs); | |||
9058 | bool isArgValueUsed = !Arg.use_empty(); | |||
9059 | unsigned PartBase = 0; | |||
9060 | Type *FinalType = Arg.getType(); | |||
9061 | if (Arg.hasAttribute(Attribute::ByVal)) | |||
9062 | FinalType = cast<PointerType>(FinalType)->getElementType(); | |||
9063 | bool NeedsRegBlock = TLI->functionArgumentNeedsConsecutiveRegisters( | |||
9064 | FinalType, F.getCallingConv(), F.isVarArg()); | |||
9065 | for (unsigned Value = 0, NumValues = ValueVTs.size(); | |||
9066 | Value != NumValues; ++Value) { | |||
9067 | EVT VT = ValueVTs[Value]; | |||
9068 | Type *ArgTy = VT.getTypeForEVT(*DAG.getContext()); | |||
9069 | ISD::ArgFlagsTy Flags; | |||
9070 | ||||
9071 | // Certain targets (such as MIPS), may have a different ABI alignment | |||
9072 | // for a type depending on the context. Give the target a chance to | |||
9073 | // specify the alignment it wants. | |||
9074 | unsigned OriginalAlignment = | |||
9075 | TLI->getABIAlignmentForCallingConv(ArgTy, DL); | |||
9076 | ||||
9077 | if (Arg.hasAttribute(Attribute::ZExt)) | |||
9078 | Flags.setZExt(); | |||
9079 | if (Arg.hasAttribute(Attribute::SExt)) | |||
9080 | Flags.setSExt(); | |||
9081 | if (Arg.hasAttribute(Attribute::InReg)) { | |||
9082 | // If we are using vectorcall calling convention, a structure that is | |||
9083 | // passed InReg - is surely an HVA | |||
9084 | if (F.getCallingConv() == CallingConv::X86_VectorCall && | |||
9085 | isa<StructType>(Arg.getType())) { | |||
9086 | // The first value of a structure is marked | |||
9087 | if (0 == Value) | |||
9088 | Flags.setHvaStart(); | |||
9089 | Flags.setHva(); | |||
9090 | } | |||
9091 | // Set InReg Flag | |||
9092 | Flags.setInReg(); | |||
9093 | } | |||
9094 | if (Arg.hasAttribute(Attribute::StructRet)) | |||
9095 | Flags.setSRet(); | |||
9096 | if (Arg.hasAttribute(Attribute::SwiftSelf)) | |||
9097 | Flags.setSwiftSelf(); | |||
9098 | if (Arg.hasAttribute(Attribute::SwiftError)) | |||
9099 | Flags.setSwiftError(); | |||
9100 | if (Arg.hasAttribute(Attribute::ByVal)) | |||
9101 | Flags.setByVal(); | |||
9102 | if (Arg.hasAttribute(Attribute::InAlloca)) { | |||
9103 | Flags.setInAlloca(); | |||
9104 | // Set the byval flag for CCAssignFn callbacks that don't know about | |||
9105 | // inalloca. This way we can know how many bytes we should've allocated | |||
9106 | // and how many bytes a callee cleanup function will pop. If we port | |||
9107 | // inalloca to more targets, we'll have to add custom inalloca handling | |||
9108 | // in the various CC lowering callbacks. | |||
9109 | Flags.setByVal(); | |||
9110 | } | |||
9111 | if (F.getCallingConv() == CallingConv::X86_INTR) { | |||
9112 | // IA Interrupt passes frame (1st parameter) by value in the stack. | |||
9113 | if (ArgNo == 0) | |||
9114 | Flags.setByVal(); | |||
9115 | } | |||
9116 | if (Flags.isByVal() || Flags.isInAlloca()) { | |||
9117 | PointerType *Ty = cast<PointerType>(Arg.getType()); | |||
9118 | Type *ElementTy = Ty->getElementType(); | |||
9119 | Flags.setByValSize(DL.getTypeAllocSize(ElementTy)); | |||
9120 | // For ByVal, alignment should be passed from FE. BE will guess if | |||
9121 | // this info is not there but there are cases it cannot get right. | |||
9122 | unsigned FrameAlign; | |||
9123 | if (Arg.getParamAlignment()) | |||
9124 | FrameAlign = Arg.getParamAlignment(); | |||
9125 | else | |||
9126 | FrameAlign = TLI->getByValTypeAlignment(ElementTy, DL); | |||
9127 | Flags.setByValAlign(FrameAlign); | |||
9128 | } | |||
9129 | if (Arg.hasAttribute(Attribute::Nest)) | |||
9130 | Flags.setNest(); | |||
9131 | if (NeedsRegBlock) | |||
9132 | Flags.setInConsecutiveRegs(); | |||
9133 | Flags.setOrigAlign(OriginalAlignment); | |||
9134 | if (ArgCopyElisionCandidates.count(&Arg)) | |||
9135 | Flags.setCopyElisionCandidate(); | |||
9136 | ||||
9137 | MVT RegisterVT = TLI->getRegisterTypeForCallingConv( | |||
9138 | *CurDAG->getContext(), F.getCallingConv(), VT); | |||
9139 | unsigned NumRegs = TLI->getNumRegistersForCallingConv( | |||
9140 | *CurDAG->getContext(), F.getCallingConv(), VT); | |||
9141 | for (unsigned i = 0; i != NumRegs; ++i) { | |||
9142 | ISD::InputArg MyFlags(Flags, RegisterVT, VT, isArgValueUsed, | |||
9143 | ArgNo, PartBase+i*RegisterVT.getStoreSize()); | |||
9144 | if (NumRegs > 1 && i == 0) | |||
9145 | MyFlags.Flags.setSplit(); | |||
9146 | // if it isn't first piece, alignment must be 1 | |||
9147 | else if (i > 0) { | |||
9148 | MyFlags.Flags.setOrigAlign(1); | |||
9149 | if (i == NumRegs - 1) | |||
9150 | MyFlags.Flags.setSplitEnd(); | |||
9151 | } | |||
9152 | Ins.push_back(MyFlags); | |||
9153 | } | |||
9154 | if (NeedsRegBlock && Value == NumValues - 1) | |||
9155 | Ins[Ins.size() - 1].Flags.setInConsecutiveRegsLast(); | |||
9156 | PartBase += VT.getStoreSize(); | |||
9157 | } | |||
9158 | } | |||
9159 | ||||
9160 | // Call the target to set up the argument values. | |||
9161 | SmallVector<SDValue, 8> InVals; | |||
9162 | SDValue NewRoot = TLI->LowerFormalArguments( | |||
9163 | DAG.getRoot(), F.getCallingConv(), F.isVarArg(), Ins, dl, DAG, InVals); | |||
9164 | ||||
9165 | // Verify that the target's LowerFormalArguments behaved as expected. | |||
9166 | assert(NewRoot.getNode() && NewRoot.getValueType() == MVT::Other &&((NewRoot.getNode() && NewRoot.getValueType() == MVT:: Other && "LowerFormalArguments didn't return a valid chain!" ) ? static_cast<void> (0) : __assert_fail ("NewRoot.getNode() && NewRoot.getValueType() == MVT::Other && \"LowerFormalArguments didn't return a valid chain!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9167, __PRETTY_FUNCTION__)) | |||
9167 | "LowerFormalArguments didn't return a valid chain!")((NewRoot.getNode() && NewRoot.getValueType() == MVT:: Other && "LowerFormalArguments didn't return a valid chain!" ) ? static_cast<void> (0) : __assert_fail ("NewRoot.getNode() && NewRoot.getValueType() == MVT::Other && \"LowerFormalArguments didn't return a valid chain!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9167, __PRETTY_FUNCTION__)); | |||
9168 | assert(InVals.size() == Ins.size() &&((InVals.size() == Ins.size() && "LowerFormalArguments didn't emit the correct number of values!" ) ? static_cast<void> (0) : __assert_fail ("InVals.size() == Ins.size() && \"LowerFormalArguments didn't emit the correct number of values!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9169, __PRETTY_FUNCTION__)) | |||
9169 | "LowerFormalArguments didn't emit the correct number of values!")((InVals.size() == Ins.size() && "LowerFormalArguments didn't emit the correct number of values!" ) ? static_cast<void> (0) : __assert_fail ("InVals.size() == Ins.size() && \"LowerFormalArguments didn't emit the correct number of values!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9169, __PRETTY_FUNCTION__)); | |||
9170 | LLVM_DEBUG({do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { { for (unsigned i = 0, e = Ins.size(); i != e; ++ i) { ((InVals[i].getNode() && "LowerFormalArguments emitted a null value!" ) ? static_cast<void> (0) : __assert_fail ("InVals[i].getNode() && \"LowerFormalArguments emitted a null value!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9173, __PRETTY_FUNCTION__)); ((EVT(Ins[i].VT) == InVals[i]. getValueType() && "LowerFormalArguments emitted a value with the wrong type!" ) ? static_cast<void> (0) : __assert_fail ("EVT(Ins[i].VT) == InVals[i].getValueType() && \"LowerFormalArguments emitted a value with the wrong type!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9175, __PRETTY_FUNCTION__)); } }; } } while (false) | |||
9171 | for (unsigned i = 0, e = Ins.size(); i != e; ++i) {do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { { for (unsigned i = 0, e = Ins.size(); i != e; ++ i) { ((InVals[i].getNode() && "LowerFormalArguments emitted a null value!" ) ? static_cast<void> (0) : __assert_fail ("InVals[i].getNode() && \"LowerFormalArguments emitted a null value!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9173, __PRETTY_FUNCTION__)); ((EVT(Ins[i].VT) == InVals[i]. getValueType() && "LowerFormalArguments emitted a value with the wrong type!" ) ? static_cast<void> (0) : __assert_fail ("EVT(Ins[i].VT) == InVals[i].getValueType() && \"LowerFormalArguments emitted a value with the wrong type!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9175, __PRETTY_FUNCTION__)); } }; } } while (false) | |||
9172 | assert(InVals[i].getNode() &&do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { { for (unsigned i = 0, e = Ins.size(); i != e; ++ i) { ((InVals[i].getNode() && "LowerFormalArguments emitted a null value!" ) ? static_cast<void> (0) : __assert_fail ("InVals[i].getNode() && \"LowerFormalArguments emitted a null value!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9173, __PRETTY_FUNCTION__)); ((EVT(Ins[i].VT) == InVals[i]. getValueType() && "LowerFormalArguments emitted a value with the wrong type!" ) ? static_cast<void> (0) : __assert_fail ("EVT(Ins[i].VT) == InVals[i].getValueType() && \"LowerFormalArguments emitted a value with the wrong type!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9175, __PRETTY_FUNCTION__)); } }; } } while (false) | |||
9173 | "LowerFormalArguments emitted a null value!");do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { { for (unsigned i = 0, e = Ins.size(); i != e; ++ i) { ((InVals[i].getNode() && "LowerFormalArguments emitted a null value!" ) ? static_cast<void> (0) : __assert_fail ("InVals[i].getNode() && \"LowerFormalArguments emitted a null value!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9173, __PRETTY_FUNCTION__)); ((EVT(Ins[i].VT) == InVals[i]. getValueType() && "LowerFormalArguments emitted a value with the wrong type!" ) ? static_cast<void> (0) : __assert_fail ("EVT(Ins[i].VT) == InVals[i].getValueType() && \"LowerFormalArguments emitted a value with the wrong type!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9175, __PRETTY_FUNCTION__)); } }; } } while (false) | |||
9174 | assert(EVT(Ins[i].VT) == InVals[i].getValueType() &&do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { { for (unsigned i = 0, e = Ins.size(); i != e; ++ i) { ((InVals[i].getNode() && "LowerFormalArguments emitted a null value!" ) ? static_cast<void> (0) : __assert_fail ("InVals[i].getNode() && \"LowerFormalArguments emitted a null value!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9173, __PRETTY_FUNCTION__)); ((EVT(Ins[i].VT) == InVals[i]. getValueType() && "LowerFormalArguments emitted a value with the wrong type!" ) ? static_cast<void> (0) : __assert_fail ("EVT(Ins[i].VT) == InVals[i].getValueType() && \"LowerFormalArguments emitted a value with the wrong type!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9175, __PRETTY_FUNCTION__)); } }; } } while (false) | |||
9175 | "LowerFormalArguments emitted a value with the wrong type!");do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { { for (unsigned i = 0, e = Ins.size(); i != e; ++ i) { ((InVals[i].getNode() && "LowerFormalArguments emitted a null value!" ) ? static_cast<void> (0) : __assert_fail ("InVals[i].getNode() && \"LowerFormalArguments emitted a null value!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9173, __PRETTY_FUNCTION__)); ((EVT(Ins[i].VT) == InVals[i]. getValueType() && "LowerFormalArguments emitted a value with the wrong type!" ) ? static_cast<void> (0) : __assert_fail ("EVT(Ins[i].VT) == InVals[i].getValueType() && \"LowerFormalArguments emitted a value with the wrong type!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9175, __PRETTY_FUNCTION__)); } }; } } while (false) | |||
9176 | }do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { { for (unsigned i = 0, e = Ins.size(); i != e; ++ i) { ((InVals[i].getNode() && "LowerFormalArguments emitted a null value!" ) ? static_cast<void> (0) : __assert_fail ("InVals[i].getNode() && \"LowerFormalArguments emitted a null value!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9173, __PRETTY_FUNCTION__)); ((EVT(Ins[i].VT) == InVals[i]. getValueType() && "LowerFormalArguments emitted a value with the wrong type!" ) ? static_cast<void> (0) : __assert_fail ("EVT(Ins[i].VT) == InVals[i].getValueType() && \"LowerFormalArguments emitted a value with the wrong type!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9175, __PRETTY_FUNCTION__)); } }; } } while (false) | |||
9177 | })do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { { for (unsigned i = 0, e = Ins.size(); i != e; ++ i) { ((InVals[i].getNode() && "LowerFormalArguments emitted a null value!" ) ? static_cast<void> (0) : __assert_fail ("InVals[i].getNode() && \"LowerFormalArguments emitted a null value!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9173, __PRETTY_FUNCTION__)); ((EVT(Ins[i].VT) == InVals[i]. getValueType() && "LowerFormalArguments emitted a value with the wrong type!" ) ? static_cast<void> (0) : __assert_fail ("EVT(Ins[i].VT) == InVals[i].getValueType() && \"LowerFormalArguments emitted a value with the wrong type!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9175, __PRETTY_FUNCTION__)); } }; } } while (false); | |||
9178 | ||||
9179 | // Update the DAG with the new chain value resulting from argument lowering. | |||
9180 | DAG.setRoot(NewRoot); | |||
9181 | ||||
9182 | // Set up the argument values. | |||
9183 | unsigned i = 0; | |||
9184 | if (!FuncInfo->CanLowerReturn) { | |||
9185 | // Create a virtual register for the sret pointer, and put in a copy | |||
9186 | // from the sret argument into it. | |||
9187 | SmallVector<EVT, 1> ValueVTs; | |||
9188 | ComputeValueVTs(*TLI, DAG.getDataLayout(), | |||
9189 | F.getReturnType()->getPointerTo( | |||
9190 | DAG.getDataLayout().getAllocaAddrSpace()), | |||
9191 | ValueVTs); | |||
9192 | MVT VT = ValueVTs[0].getSimpleVT(); | |||
9193 | MVT RegVT = TLI->getRegisterType(*CurDAG->getContext(), VT); | |||
9194 | Optional<ISD::NodeType> AssertOp = None; | |||
9195 | SDValue ArgValue = getCopyFromParts(DAG, dl, &InVals[0], 1, RegVT, VT, | |||
9196 | nullptr, F.getCallingConv(), AssertOp); | |||
9197 | ||||
9198 | MachineFunction& MF = SDB->DAG.getMachineFunction(); | |||
9199 | MachineRegisterInfo& RegInfo = MF.getRegInfo(); | |||
9200 | unsigned SRetReg = RegInfo.createVirtualRegister(TLI->getRegClassFor(RegVT)); | |||
9201 | FuncInfo->DemoteRegister = SRetReg; | |||
9202 | NewRoot = | |||
9203 | SDB->DAG.getCopyToReg(NewRoot, SDB->getCurSDLoc(), SRetReg, ArgValue); | |||
9204 | DAG.setRoot(NewRoot); | |||
9205 | ||||
9206 | // i indexes lowered arguments. Bump it past the hidden sret argument. | |||
9207 | ++i; | |||
9208 | } | |||
9209 | ||||
9210 | SmallVector<SDValue, 4> Chains; | |||
9211 | DenseMap<int, int> ArgCopyElisionFrameIndexMap; | |||
9212 | for (const Argument &Arg : F.args()) { | |||
9213 | SmallVector<SDValue, 4> ArgValues; | |||
9214 | SmallVector<EVT, 4> ValueVTs; | |||
9215 | ComputeValueVTs(*TLI, DAG.getDataLayout(), Arg.getType(), ValueVTs); | |||
9216 | unsigned NumValues = ValueVTs.size(); | |||
9217 | if (NumValues == 0) | |||
9218 | continue; | |||
9219 | ||||
9220 | bool ArgHasUses = !Arg.use_empty(); | |||
9221 | ||||
9222 | // Elide the copying store if the target loaded this argument from a | |||
9223 | // suitable fixed stack object. | |||
9224 | if (Ins[i].Flags.isCopyElisionCandidate()) { | |||
9225 | tryToElideArgumentCopy(FuncInfo, Chains, ArgCopyElisionFrameIndexMap, | |||
9226 | ElidedArgCopyInstrs, ArgCopyElisionCandidates, Arg, | |||
9227 | InVals[i], ArgHasUses); | |||
9228 | } | |||
9229 | ||||
9230 | // If this argument is unused then remember its value. It is used to generate | |||
9231 | // debugging information. | |||
9232 | bool isSwiftErrorArg = | |||
9233 | TLI->supportSwiftError() && | |||
9234 | Arg.hasAttribute(Attribute::SwiftError); | |||
9235 | if (!ArgHasUses && !isSwiftErrorArg) { | |||
9236 | SDB->setUnusedArgValue(&Arg, InVals[i]); | |||
9237 | ||||
9238 | // Also remember any frame index for use in FastISel. | |||
9239 | if (FrameIndexSDNode *FI = | |||
9240 | dyn_cast<FrameIndexSDNode>(InVals[i].getNode())) | |||
9241 | FuncInfo->setArgumentFrameIndex(&Arg, FI->getIndex()); | |||
9242 | } | |||
9243 | ||||
9244 | for (unsigned Val = 0; Val != NumValues; ++Val) { | |||
9245 | EVT VT = ValueVTs[Val]; | |||
9246 | MVT PartVT = TLI->getRegisterTypeForCallingConv(*CurDAG->getContext(), | |||
9247 | F.getCallingConv(), VT); | |||
9248 | unsigned NumParts = TLI->getNumRegistersForCallingConv( | |||
9249 | *CurDAG->getContext(), F.getCallingConv(), VT); | |||
9250 | ||||
9251 | // Even an apparant 'unused' swifterror argument needs to be returned. So | |||
9252 | // we do generate a copy for it that can be used on return from the | |||
9253 | // function. | |||
9254 | if (ArgHasUses || isSwiftErrorArg) { | |||
9255 | Optional<ISD::NodeType> AssertOp; | |||
9256 | if (Arg.hasAttribute(Attribute::SExt)) | |||
9257 | AssertOp = ISD::AssertSext; | |||
9258 | else if (Arg.hasAttribute(Attribute::ZExt)) | |||
9259 | AssertOp = ISD::AssertZext; | |||
9260 | ||||
9261 | ArgValues.push_back(getCopyFromParts(DAG, dl, &InVals[i], NumParts, | |||
9262 | PartVT, VT, nullptr, | |||
9263 | F.getCallingConv(), AssertOp)); | |||
9264 | } | |||
9265 | ||||
9266 | i += NumParts; | |||
9267 | } | |||
9268 | ||||
9269 | // We don't need to do anything else for unused arguments. | |||
9270 | if (ArgValues.empty()) | |||
9271 | continue; | |||
9272 | ||||
9273 | // Note down frame index. | |||
9274 | if (FrameIndexSDNode *FI = | |||
9275 | dyn_cast<FrameIndexSDNode>(ArgValues[0].getNode())) | |||
9276 | FuncInfo->setArgumentFrameIndex(&Arg, FI->getIndex()); | |||
9277 | ||||
9278 | SDValue Res = DAG.getMergeValues(makeArrayRef(ArgValues.data(), NumValues), | |||
9279 | SDB->getCurSDLoc()); | |||
9280 | ||||
9281 | SDB->setValue(&Arg, Res); | |||
9282 | if (!TM.Options.EnableFastISel && Res.getOpcode() == ISD::BUILD_PAIR) { | |||
9283 | // We want to associate the argument with the frame index, among | |||
9284 | // involved operands, that correspond to the lowest address. The | |||
9285 | // getCopyFromParts function, called earlier, is swapping the order of | |||
9286 | // the operands to BUILD_PAIR depending on endianness. The result of | |||
9287 | // that swapping is that the least significant bits of the argument will | |||
9288 | // be in the first operand of the BUILD_PAIR node, and the most | |||
9289 | // significant bits will be in the second operand. | |||
9290 | unsigned LowAddressOp = DAG.getDataLayout().isBigEndian() ? 1 : 0; | |||
9291 | if (LoadSDNode *LNode = | |||
9292 | dyn_cast<LoadSDNode>(Res.getOperand(LowAddressOp).getNode())) | |||
9293 | if (FrameIndexSDNode *FI = | |||
9294 | dyn_cast<FrameIndexSDNode>(LNode->getBasePtr().getNode())) | |||
9295 | FuncInfo->setArgumentFrameIndex(&Arg, FI->getIndex()); | |||
9296 | } | |||
9297 | ||||
9298 | // Update the SwiftErrorVRegDefMap. | |||
9299 | if (Res.getOpcode() == ISD::CopyFromReg && isSwiftErrorArg) { | |||
9300 | unsigned Reg = cast<RegisterSDNode>(Res.getOperand(1))->getReg(); | |||
9301 | if (TargetRegisterInfo::isVirtualRegister(Reg)) | |||
9302 | FuncInfo->setCurrentSwiftErrorVReg(FuncInfo->MBB, | |||
9303 | FuncInfo->SwiftErrorArg, Reg); | |||
9304 | } | |||
9305 | ||||
9306 | // If this argument is live outside of the entry block, insert a copy from | |||
9307 | // wherever we got it to the vreg that other BB's will reference it as. | |||
9308 | if (!TM.Options.EnableFastISel && Res.getOpcode() == ISD::CopyFromReg) { | |||
9309 | // If we can, though, try to skip creating an unnecessary vreg. | |||
9310 | // FIXME: This isn't very clean... it would be nice to make this more | |||
9311 | // general. It's also subtly incompatible with the hacks FastISel | |||
9312 | // uses with vregs. | |||
9313 | unsigned Reg = cast<RegisterSDNode>(Res.getOperand(1))->getReg(); | |||
9314 | if (TargetRegisterInfo::isVirtualRegister(Reg)) { | |||
9315 | FuncInfo->ValueMap[&Arg] = Reg; | |||
9316 | continue; | |||
9317 | } | |||
9318 | } | |||
9319 | if (!isOnlyUsedInEntryBlock(&Arg, TM.Options.EnableFastISel)) { | |||
9320 | FuncInfo->InitializeRegForValue(&Arg); | |||
9321 | SDB->CopyToExportRegsIfNeeded(&Arg); | |||
9322 | } | |||
9323 | } | |||
9324 | ||||
9325 | if (!Chains.empty()) { | |||
9326 | Chains.push_back(NewRoot); | |||
9327 | NewRoot = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Chains); | |||
9328 | } | |||
9329 | ||||
9330 | DAG.setRoot(NewRoot); | |||
9331 | ||||
9332 | assert(i == InVals.size() && "Argument register count mismatch!")((i == InVals.size() && "Argument register count mismatch!" ) ? static_cast<void> (0) : __assert_fail ("i == InVals.size() && \"Argument register count mismatch!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9332, __PRETTY_FUNCTION__)); | |||
9333 | ||||
9334 | // If any argument copy elisions occurred and we have debug info, update the | |||
9335 | // stale frame indices used in the dbg.declare variable info table. | |||
9336 | MachineFunction::VariableDbgInfoMapTy &DbgDeclareInfo = MF->getVariableDbgInfo(); | |||
9337 | if (!DbgDeclareInfo.empty() && !ArgCopyElisionFrameIndexMap.empty()) { | |||
9338 | for (MachineFunction::VariableDbgInfo &VI : DbgDeclareInfo) { | |||
9339 | auto I = ArgCopyElisionFrameIndexMap.find(VI.Slot); | |||
9340 | if (I != ArgCopyElisionFrameIndexMap.end()) | |||
9341 | VI.Slot = I->second; | |||
9342 | } | |||
9343 | } | |||
9344 | ||||
9345 | // Finally, if the target has anything special to do, allow it to do so. | |||
9346 | EmitFunctionEntryCode(); | |||
9347 | } | |||
9348 | ||||
9349 | /// Handle PHI nodes in successor blocks. Emit code into the SelectionDAG to | |||
9350 | /// ensure constants are generated when needed. Remember the virtual registers | |||
9351 | /// that need to be added to the Machine PHI nodes as input. We cannot just | |||
9352 | /// directly add them, because expansion might result in multiple MBB's for one | |||
9353 | /// BB. As such, the start of the BB might correspond to a different MBB than | |||
9354 | /// the end. | |||
9355 | void | |||
9356 | SelectionDAGBuilder::HandlePHINodesInSuccessorBlocks(const BasicBlock *LLVMBB) { | |||
9357 | const Instruction *TI = LLVMBB->getTerminator(); | |||
9358 | ||||
9359 | SmallPtrSet<MachineBasicBlock *, 4> SuccsHandled; | |||
9360 | ||||
9361 | // Check PHI nodes in successors that expect a value to be available from this | |||
9362 | // block. | |||
9363 | for (unsigned succ = 0, e = TI->getNumSuccessors(); succ != e; ++succ) { | |||
9364 | const BasicBlock *SuccBB = TI->getSuccessor(succ); | |||
9365 | if (!isa<PHINode>(SuccBB->begin())) continue; | |||
9366 | MachineBasicBlock *SuccMBB = FuncInfo.MBBMap[SuccBB]; | |||
9367 | ||||
9368 | // If this terminator has multiple identical successors (common for | |||
9369 | // switches), only handle each succ once. | |||
9370 | if (!SuccsHandled.insert(SuccMBB).second) | |||
9371 | continue; | |||
9372 | ||||
9373 | MachineBasicBlock::iterator MBBI = SuccMBB->begin(); | |||
9374 | ||||
9375 | // At this point we know that there is a 1-1 correspondence between LLVM PHI | |||
9376 | // nodes and Machine PHI nodes, but the incoming operands have not been | |||
9377 | // emitted yet. | |||
9378 | for (const PHINode &PN : SuccBB->phis()) { | |||
9379 | // Ignore dead phi's. | |||
9380 | if (PN.use_empty()) | |||
9381 | continue; | |||
9382 | ||||
9383 | // Skip empty types | |||
9384 | if (PN.getType()->isEmptyTy()) | |||
9385 | continue; | |||
9386 | ||||
9387 | unsigned Reg; | |||
9388 | const Value *PHIOp = PN.getIncomingValueForBlock(LLVMBB); | |||
9389 | ||||
9390 | if (const Constant *C = dyn_cast<Constant>(PHIOp)) { | |||
9391 | unsigned &RegOut = ConstantsOut[C]; | |||
9392 | if (RegOut == 0) { | |||
9393 | RegOut = FuncInfo.CreateRegs(C->getType()); | |||
9394 | CopyValueToVirtualRegister(C, RegOut); | |||
9395 | } | |||
9396 | Reg = RegOut; | |||
9397 | } else { | |||
9398 | DenseMap<const Value *, unsigned>::iterator I = | |||
9399 | FuncInfo.ValueMap.find(PHIOp); | |||
9400 | if (I != FuncInfo.ValueMap.end()) | |||
9401 | Reg = I->second; | |||
9402 | else { | |||
9403 | assert(isa<AllocaInst>(PHIOp) &&((isa<AllocaInst>(PHIOp) && FuncInfo.StaticAllocaMap .count(cast<AllocaInst>(PHIOp)) && "Didn't codegen value into a register!??" ) ? static_cast<void> (0) : __assert_fail ("isa<AllocaInst>(PHIOp) && FuncInfo.StaticAllocaMap.count(cast<AllocaInst>(PHIOp)) && \"Didn't codegen value into a register!??\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9405, __PRETTY_FUNCTION__)) | |||
9404 | FuncInfo.StaticAllocaMap.count(cast<AllocaInst>(PHIOp)) &&((isa<AllocaInst>(PHIOp) && FuncInfo.StaticAllocaMap .count(cast<AllocaInst>(PHIOp)) && "Didn't codegen value into a register!??" ) ? static_cast<void> (0) : __assert_fail ("isa<AllocaInst>(PHIOp) && FuncInfo.StaticAllocaMap.count(cast<AllocaInst>(PHIOp)) && \"Didn't codegen value into a register!??\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9405, __PRETTY_FUNCTION__)) | |||
9405 | "Didn't codegen value into a register!??")((isa<AllocaInst>(PHIOp) && FuncInfo.StaticAllocaMap .count(cast<AllocaInst>(PHIOp)) && "Didn't codegen value into a register!??" ) ? static_cast<void> (0) : __assert_fail ("isa<AllocaInst>(PHIOp) && FuncInfo.StaticAllocaMap.count(cast<AllocaInst>(PHIOp)) && \"Didn't codegen value into a register!??\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9405, __PRETTY_FUNCTION__)); | |||
9406 | Reg = FuncInfo.CreateRegs(PHIOp->getType()); | |||
9407 | CopyValueToVirtualRegister(PHIOp, Reg); | |||
9408 | } | |||
9409 | } | |||
9410 | ||||
9411 | // Remember that this register needs to added to the machine PHI node as | |||
9412 | // the input for this MBB. | |||
9413 | SmallVector<EVT, 4> ValueVTs; | |||
9414 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
9415 | ComputeValueVTs(TLI, DAG.getDataLayout(), PN.getType(), ValueVTs); | |||
9416 | for (unsigned vti = 0, vte = ValueVTs.size(); vti != vte; ++vti) { | |||
9417 | EVT VT = ValueVTs[vti]; | |||
9418 | unsigned NumRegisters = TLI.getNumRegisters(*DAG.getContext(), VT); | |||
9419 | for (unsigned i = 0, e = NumRegisters; i != e; ++i) | |||
9420 | FuncInfo.PHINodesToUpdate.push_back( | |||
9421 | std::make_pair(&*MBBI++, Reg + i)); | |||
9422 | Reg += NumRegisters; | |||
9423 | } | |||
9424 | } | |||
9425 | } | |||
9426 | ||||
9427 | ConstantsOut.clear(); | |||
9428 | } | |||
9429 | ||||
9430 | /// Add a successor MBB to ParentMBB< creating a new MachineBB for BB if SuccMBB | |||
9431 | /// is 0. | |||
9432 | MachineBasicBlock * | |||
9433 | SelectionDAGBuilder::StackProtectorDescriptor:: | |||
9434 | AddSuccessorMBB(const BasicBlock *BB, | |||
9435 | MachineBasicBlock *ParentMBB, | |||
9436 | bool IsLikely, | |||
9437 | MachineBasicBlock *SuccMBB) { | |||
9438 | // If SuccBB has not been created yet, create it. | |||
9439 | if (!SuccMBB) { | |||
9440 | MachineFunction *MF = ParentMBB->getParent(); | |||
9441 | MachineFunction::iterator BBI(ParentMBB); | |||
9442 | SuccMBB = MF->CreateMachineBasicBlock(BB); | |||
9443 | MF->insert(++BBI, SuccMBB); | |||
9444 | } | |||
9445 | // Add it as a successor of ParentMBB. | |||
9446 | ParentMBB->addSuccessor( | |||
9447 | SuccMBB, BranchProbabilityInfo::getBranchProbStackProtector(IsLikely)); | |||
9448 | return SuccMBB; | |||
9449 | } | |||
9450 | ||||
9451 | MachineBasicBlock *SelectionDAGBuilder::NextBlock(MachineBasicBlock *MBB) { | |||
9452 | MachineFunction::iterator I(MBB); | |||
9453 | if (++I == FuncInfo.MF->end()) | |||
9454 | return nullptr; | |||
9455 | return &*I; | |||
9456 | } | |||
9457 | ||||
9458 | /// During lowering new call nodes can be created (such as memset, etc.). | |||
9459 | /// Those will become new roots of the current DAG, but complications arise | |||
9460 | /// when they are tail calls. In such cases, the call lowering will update | |||
9461 | /// the root, but the builder still needs to know that a tail call has been | |||
9462 | /// lowered in order to avoid generating an additional return. | |||
9463 | void SelectionDAGBuilder::updateDAGForMaybeTailCall(SDValue MaybeTC) { | |||
9464 | // If the node is null, we do have a tail call. | |||
9465 | if (MaybeTC.getNode() != nullptr) | |||
9466 | DAG.setRoot(MaybeTC); | |||
9467 | else | |||
9468 | HasTailCall = true; | |||
9469 | } | |||
9470 | ||||
9471 | uint64_t | |||
9472 | SelectionDAGBuilder::getJumpTableRange(const CaseClusterVector &Clusters, | |||
9473 | unsigned First, unsigned Last) const { | |||
9474 | assert(Last >= First)((Last >= First) ? static_cast<void> (0) : __assert_fail ("Last >= First", "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9474, __PRETTY_FUNCTION__)); | |||
9475 | const APInt &LowCase = Clusters[First].Low->getValue(); | |||
9476 | const APInt &HighCase = Clusters[Last].High->getValue(); | |||
9477 | assert(LowCase.getBitWidth() == HighCase.getBitWidth())((LowCase.getBitWidth() == HighCase.getBitWidth()) ? static_cast <void> (0) : __assert_fail ("LowCase.getBitWidth() == HighCase.getBitWidth()" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9477, __PRETTY_FUNCTION__)); | |||
9478 | ||||
9479 | // FIXME: A range of consecutive cases has 100% density, but only requires one | |||
9480 | // comparison to lower. We should discriminate against such consecutive ranges | |||
9481 | // in jump tables. | |||
9482 | ||||
9483 | return (HighCase - LowCase).getLimitedValue((UINT64_MAX(18446744073709551615UL) - 1) / 100) + 1; | |||
9484 | } | |||
9485 | ||||
9486 | uint64_t SelectionDAGBuilder::getJumpTableNumCases( | |||
9487 | const SmallVectorImpl<unsigned> &TotalCases, unsigned First, | |||
9488 | unsigned Last) const { | |||
9489 | assert(Last >= First)((Last >= First) ? static_cast<void> (0) : __assert_fail ("Last >= First", "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9489, __PRETTY_FUNCTION__)); | |||
9490 | assert(TotalCases[Last] >= TotalCases[First])((TotalCases[Last] >= TotalCases[First]) ? static_cast< void> (0) : __assert_fail ("TotalCases[Last] >= TotalCases[First]" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9490, __PRETTY_FUNCTION__)); | |||
9491 | uint64_t NumCases = | |||
9492 | TotalCases[Last] - (First == 0 ? 0 : TotalCases[First - 1]); | |||
9493 | return NumCases; | |||
9494 | } | |||
9495 | ||||
9496 | bool SelectionDAGBuilder::buildJumpTable(const CaseClusterVector &Clusters, | |||
9497 | unsigned First, unsigned Last, | |||
9498 | const SwitchInst *SI, | |||
9499 | MachineBasicBlock *DefaultMBB, | |||
9500 | CaseCluster &JTCluster) { | |||
9501 | assert(First <= Last)((First <= Last) ? static_cast<void> (0) : __assert_fail ("First <= Last", "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9501, __PRETTY_FUNCTION__)); | |||
9502 | ||||
9503 | auto Prob = BranchProbability::getZero(); | |||
9504 | unsigned NumCmps = 0; | |||
9505 | std::vector<MachineBasicBlock*> Table; | |||
9506 | DenseMap<MachineBasicBlock*, BranchProbability> JTProbs; | |||
9507 | ||||
9508 | // Initialize probabilities in JTProbs. | |||
9509 | for (unsigned I = First; I <= Last; ++I) | |||
9510 | JTProbs[Clusters[I].MBB] = BranchProbability::getZero(); | |||
9511 | ||||
9512 | for (unsigned I = First; I <= Last; ++I) { | |||
9513 | assert(Clusters[I].Kind == CC_Range)((Clusters[I].Kind == CC_Range) ? static_cast<void> (0) : __assert_fail ("Clusters[I].Kind == CC_Range", "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9513, __PRETTY_FUNCTION__)); | |||
9514 | Prob += Clusters[I].Prob; | |||
9515 | const APInt &Low = Clusters[I].Low->getValue(); | |||
9516 | const APInt &High = Clusters[I].High->getValue(); | |||
9517 | NumCmps += (Low == High) ? 1 : 2; | |||
9518 | if (I != First) { | |||
9519 | // Fill the gap between this and the previous cluster. | |||
9520 | const APInt &PreviousHigh = Clusters[I - 1].High->getValue(); | |||
9521 | assert(PreviousHigh.slt(Low))((PreviousHigh.slt(Low)) ? static_cast<void> (0) : __assert_fail ("PreviousHigh.slt(Low)", "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9521, __PRETTY_FUNCTION__)); | |||
9522 | uint64_t Gap = (Low - PreviousHigh).getLimitedValue() - 1; | |||
9523 | for (uint64_t J = 0; J < Gap; J++) | |||
9524 | Table.push_back(DefaultMBB); | |||
9525 | } | |||
9526 | uint64_t ClusterSize = (High - Low).getLimitedValue() + 1; | |||
9527 | for (uint64_t J = 0; J < ClusterSize; ++J) | |||
9528 | Table.push_back(Clusters[I].MBB); | |||
9529 | JTProbs[Clusters[I].MBB] += Clusters[I].Prob; | |||
9530 | } | |||
9531 | ||||
9532 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
9533 | unsigned NumDests = JTProbs.size(); | |||
9534 | if (TLI.isSuitableForBitTests( | |||
9535 | NumDests, NumCmps, Clusters[First].Low->getValue(), | |||
9536 | Clusters[Last].High->getValue(), DAG.getDataLayout())) { | |||
9537 | // Clusters[First..Last] should be lowered as bit tests instead. | |||
9538 | return false; | |||
9539 | } | |||
9540 | ||||
9541 | // Create the MBB that will load from and jump through the table. | |||
9542 | // Note: We create it here, but it's not inserted into the function yet. | |||
9543 | MachineFunction *CurMF = FuncInfo.MF; | |||
9544 | MachineBasicBlock *JumpTableMBB = | |||
9545 | CurMF->CreateMachineBasicBlock(SI->getParent()); | |||
9546 | ||||
9547 | // Add successors. Note: use table order for determinism. | |||
9548 | SmallPtrSet<MachineBasicBlock *, 8> Done; | |||
9549 | for (MachineBasicBlock *Succ : Table) { | |||
9550 | if (Done.count(Succ)) | |||
9551 | continue; | |||
9552 | addSuccessorWithProb(JumpTableMBB, Succ, JTProbs[Succ]); | |||
9553 | Done.insert(Succ); | |||
9554 | } | |||
9555 | JumpTableMBB->normalizeSuccProbs(); | |||
9556 | ||||
9557 | unsigned JTI = CurMF->getOrCreateJumpTableInfo(TLI.getJumpTableEncoding()) | |||
9558 | ->createJumpTableIndex(Table); | |||
9559 | ||||
9560 | // Set up the jump table info. | |||
9561 | JumpTable JT(-1U, JTI, JumpTableMBB, nullptr); | |||
9562 | JumpTableHeader JTH(Clusters[First].Low->getValue(), | |||
9563 | Clusters[Last].High->getValue(), SI->getCondition(), | |||
9564 | nullptr, false); | |||
9565 | JTCases.emplace_back(std::move(JTH), std::move(JT)); | |||
9566 | ||||
9567 | JTCluster = CaseCluster::jumpTable(Clusters[First].Low, Clusters[Last].High, | |||
9568 | JTCases.size() - 1, Prob); | |||
9569 | return true; | |||
9570 | } | |||
9571 | ||||
9572 | void SelectionDAGBuilder::findJumpTables(CaseClusterVector &Clusters, | |||
9573 | const SwitchInst *SI, | |||
9574 | MachineBasicBlock *DefaultMBB) { | |||
9575 | #ifndef NDEBUG | |||
9576 | // Clusters must be non-empty, sorted, and only contain Range clusters. | |||
9577 | assert(!Clusters.empty())((!Clusters.empty()) ? static_cast<void> (0) : __assert_fail ("!Clusters.empty()", "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9577, __PRETTY_FUNCTION__)); | |||
9578 | for (CaseCluster &C : Clusters) | |||
9579 | assert(C.Kind == CC_Range)((C.Kind == CC_Range) ? static_cast<void> (0) : __assert_fail ("C.Kind == CC_Range", "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9579, __PRETTY_FUNCTION__)); | |||
9580 | for (unsigned i = 1, e = Clusters.size(); i < e; ++i) | |||
9581 | assert(Clusters[i - 1].High->getValue().slt(Clusters[i].Low->getValue()))((Clusters[i - 1].High->getValue().slt(Clusters[i].Low-> getValue())) ? static_cast<void> (0) : __assert_fail ("Clusters[i - 1].High->getValue().slt(Clusters[i].Low->getValue())" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9581, __PRETTY_FUNCTION__)); | |||
9582 | #endif | |||
9583 | ||||
9584 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
9585 | if (!TLI.areJTsAllowed(SI->getParent()->getParent())) | |||
9586 | return; | |||
9587 | ||||
9588 | const int64_t N = Clusters.size(); | |||
9589 | const unsigned MinJumpTableEntries = TLI.getMinimumJumpTableEntries(); | |||
9590 | const unsigned SmallNumberOfEntries = MinJumpTableEntries / 2; | |||
9591 | ||||
9592 | if (N < 2 || N < MinJumpTableEntries) | |||
9593 | return; | |||
9594 | ||||
9595 | // TotalCases[i]: Total nbr of cases in Clusters[0..i]. | |||
9596 | SmallVector<unsigned, 8> TotalCases(N); | |||
9597 | for (unsigned i = 0; i < N; ++i) { | |||
9598 | const APInt &Hi = Clusters[i].High->getValue(); | |||
9599 | const APInt &Lo = Clusters[i].Low->getValue(); | |||
9600 | TotalCases[i] = (Hi - Lo).getLimitedValue() + 1; | |||
9601 | if (i != 0) | |||
9602 | TotalCases[i] += TotalCases[i - 1]; | |||
9603 | } | |||
9604 | ||||
9605 | // Cheap case: the whole range may be suitable for jump table. | |||
9606 | uint64_t Range = getJumpTableRange(Clusters,0, N - 1); | |||
9607 | uint64_t NumCases = getJumpTableNumCases(TotalCases, 0, N - 1); | |||
9608 | assert(NumCases < UINT64_MAX / 100)((NumCases < (18446744073709551615UL) / 100) ? static_cast <void> (0) : __assert_fail ("NumCases < UINT64_MAX / 100" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9608, __PRETTY_FUNCTION__)); | |||
9609 | assert(Range >= NumCases)((Range >= NumCases) ? static_cast<void> (0) : __assert_fail ("Range >= NumCases", "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9609, __PRETTY_FUNCTION__)); | |||
9610 | if (TLI.isSuitableForJumpTable(SI, NumCases, Range)) { | |||
9611 | CaseCluster JTCluster; | |||
9612 | if (buildJumpTable(Clusters, 0, N - 1, SI, DefaultMBB, JTCluster)) { | |||
9613 | Clusters[0] = JTCluster; | |||
9614 | Clusters.resize(1); | |||
9615 | return; | |||
9616 | } | |||
9617 | } | |||
9618 | ||||
9619 | // The algorithm below is not suitable for -O0. | |||
9620 | if (TM.getOptLevel() == CodeGenOpt::None) | |||
9621 | return; | |||
9622 | ||||
9623 | // Split Clusters into minimum number of dense partitions. The algorithm uses | |||
9624 | // the same idea as Kannan & Proebsting "Correction to 'Producing Good Code | |||
9625 | // for the Case Statement'" (1994), but builds the MinPartitions array in | |||
9626 | // reverse order to make it easier to reconstruct the partitions in ascending | |||
9627 | // order. In the choice between two optimal partitionings, it picks the one | |||
9628 | // which yields more jump tables. | |||
9629 | ||||
9630 | // MinPartitions[i] is the minimum nbr of partitions of Clusters[i..N-1]. | |||
9631 | SmallVector<unsigned, 8> MinPartitions(N); | |||
9632 | // LastElement[i] is the last element of the partition starting at i. | |||
9633 | SmallVector<unsigned, 8> LastElement(N); | |||
9634 | // PartitionsScore[i] is used to break ties when choosing between two | |||
9635 | // partitionings resulting in the same number of partitions. | |||
9636 | SmallVector<unsigned, 8> PartitionsScore(N); | |||
9637 | // For PartitionsScore, a small number of comparisons is considered as good as | |||
9638 | // a jump table and a single comparison is considered better than a jump | |||
9639 | // table. | |||
9640 | enum PartitionScores : unsigned { | |||
9641 | NoTable = 0, | |||
9642 | Table = 1, | |||
9643 | FewCases = 1, | |||
9644 | SingleCase = 2 | |||
9645 | }; | |||
9646 | ||||
9647 | // Base case: There is only one way to partition Clusters[N-1]. | |||
9648 | MinPartitions[N - 1] = 1; | |||
9649 | LastElement[N - 1] = N - 1; | |||
9650 | PartitionsScore[N - 1] = PartitionScores::SingleCase; | |||
9651 | ||||
9652 | // Note: loop indexes are signed to avoid underflow. | |||
9653 | for (int64_t i = N - 2; i >= 0; i--) { | |||
9654 | // Find optimal partitioning of Clusters[i..N-1]. | |||
9655 | // Baseline: Put Clusters[i] into a partition on its own. | |||
9656 | MinPartitions[i] = MinPartitions[i + 1] + 1; | |||
9657 | LastElement[i] = i; | |||
9658 | PartitionsScore[i] = PartitionsScore[i + 1] + PartitionScores::SingleCase; | |||
9659 | ||||
9660 | // Search for a solution that results in fewer partitions. | |||
9661 | for (int64_t j = N - 1; j > i; j--) { | |||
9662 | // Try building a partition from Clusters[i..j]. | |||
9663 | uint64_t Range = getJumpTableRange(Clusters, i, j); | |||
9664 | uint64_t NumCases = getJumpTableNumCases(TotalCases, i, j); | |||
9665 | assert(NumCases < UINT64_MAX / 100)((NumCases < (18446744073709551615UL) / 100) ? static_cast <void> (0) : __assert_fail ("NumCases < UINT64_MAX / 100" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9665, __PRETTY_FUNCTION__)); | |||
9666 | assert(Range >= NumCases)((Range >= NumCases) ? static_cast<void> (0) : __assert_fail ("Range >= NumCases", "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9666, __PRETTY_FUNCTION__)); | |||
9667 | if (TLI.isSuitableForJumpTable(SI, NumCases, Range)) { | |||
9668 | unsigned NumPartitions = 1 + (j == N - 1 ? 0 : MinPartitions[j + 1]); | |||
9669 | unsigned Score = j == N - 1 ? 0 : PartitionsScore[j + 1]; | |||
9670 | int64_t NumEntries = j - i + 1; | |||
9671 | ||||
9672 | if (NumEntries == 1) | |||
9673 | Score += PartitionScores::SingleCase; | |||
9674 | else if (NumEntries <= SmallNumberOfEntries) | |||
9675 | Score += PartitionScores::FewCases; | |||
9676 | else if (NumEntries >= MinJumpTableEntries) | |||
9677 | Score += PartitionScores::Table; | |||
9678 | ||||
9679 | // If this leads to fewer partitions, or to the same number of | |||
9680 | // partitions with better score, it is a better partitioning. | |||
9681 | if (NumPartitions < MinPartitions[i] || | |||
9682 | (NumPartitions == MinPartitions[i] && Score > PartitionsScore[i])) { | |||
9683 | MinPartitions[i] = NumPartitions; | |||
9684 | LastElement[i] = j; | |||
9685 | PartitionsScore[i] = Score; | |||
9686 | } | |||
9687 | } | |||
9688 | } | |||
9689 | } | |||
9690 | ||||
9691 | // Iterate over the partitions, replacing some with jump tables in-place. | |||
9692 | unsigned DstIndex = 0; | |||
9693 | for (unsigned First = 0, Last; First < N; First = Last + 1) { | |||
9694 | Last = LastElement[First]; | |||
9695 | assert(Last >= First)((Last >= First) ? static_cast<void> (0) : __assert_fail ("Last >= First", "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9695, __PRETTY_FUNCTION__)); | |||
9696 | assert(DstIndex <= First)((DstIndex <= First) ? static_cast<void> (0) : __assert_fail ("DstIndex <= First", "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9696, __PRETTY_FUNCTION__)); | |||
9697 | unsigned NumClusters = Last - First + 1; | |||
9698 | ||||
9699 | CaseCluster JTCluster; | |||
9700 | if (NumClusters >= MinJumpTableEntries && | |||
9701 | buildJumpTable(Clusters, First, Last, SI, DefaultMBB, JTCluster)) { | |||
9702 | Clusters[DstIndex++] = JTCluster; | |||
9703 | } else { | |||
9704 | for (unsigned I = First; I <= Last; ++I) | |||
9705 | std::memmove(&Clusters[DstIndex++], &Clusters[I], sizeof(Clusters[I])); | |||
9706 | } | |||
9707 | } | |||
9708 | Clusters.resize(DstIndex); | |||
9709 | } | |||
9710 | ||||
9711 | bool SelectionDAGBuilder::buildBitTests(CaseClusterVector &Clusters, | |||
9712 | unsigned First, unsigned Last, | |||
9713 | const SwitchInst *SI, | |||
9714 | CaseCluster &BTCluster) { | |||
9715 | assert(First <= Last)((First <= Last) ? static_cast<void> (0) : __assert_fail ("First <= Last", "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9715, __PRETTY_FUNCTION__)); | |||
9716 | if (First == Last) | |||
9717 | return false; | |||
9718 | ||||
9719 | BitVector Dests(FuncInfo.MF->getNumBlockIDs()); | |||
9720 | unsigned NumCmps = 0; | |||
9721 | for (int64_t I = First; I <= Last; ++I) { | |||
9722 | assert(Clusters[I].Kind == CC_Range)((Clusters[I].Kind == CC_Range) ? static_cast<void> (0) : __assert_fail ("Clusters[I].Kind == CC_Range", "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9722, __PRETTY_FUNCTION__)); | |||
9723 | Dests.set(Clusters[I].MBB->getNumber()); | |||
9724 | NumCmps += (Clusters[I].Low == Clusters[I].High) ? 1 : 2; | |||
9725 | } | |||
9726 | unsigned NumDests = Dests.count(); | |||
9727 | ||||
9728 | APInt Low = Clusters[First].Low->getValue(); | |||
9729 | APInt High = Clusters[Last].High->getValue(); | |||
9730 | assert(Low.slt(High))((Low.slt(High)) ? static_cast<void> (0) : __assert_fail ("Low.slt(High)", "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9730, __PRETTY_FUNCTION__)); | |||
9731 | ||||
9732 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
9733 | const DataLayout &DL = DAG.getDataLayout(); | |||
9734 | if (!TLI.isSuitableForBitTests(NumDests, NumCmps, Low, High, DL)) | |||
9735 | return false; | |||
9736 | ||||
9737 | APInt LowBound; | |||
9738 | APInt CmpRange; | |||
9739 | ||||
9740 | const int BitWidth = TLI.getPointerTy(DL).getSizeInBits(); | |||
9741 | assert(TLI.rangeFitsInWord(Low, High, DL) &&((TLI.rangeFitsInWord(Low, High, DL) && "Case range must fit in bit mask!" ) ? static_cast<void> (0) : __assert_fail ("TLI.rangeFitsInWord(Low, High, DL) && \"Case range must fit in bit mask!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9742, __PRETTY_FUNCTION__)) | |||
9742 | "Case range must fit in bit mask!")((TLI.rangeFitsInWord(Low, High, DL) && "Case range must fit in bit mask!" ) ? static_cast<void> (0) : __assert_fail ("TLI.rangeFitsInWord(Low, High, DL) && \"Case range must fit in bit mask!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9742, __PRETTY_FUNCTION__)); | |||
9743 | ||||
9744 | // Check if the clusters cover a contiguous range such that no value in the | |||
9745 | // range will jump to the default statement. | |||
9746 | bool ContiguousRange = true; | |||
9747 | for (int64_t I = First + 1; I <= Last; ++I) { | |||
9748 | if (Clusters[I].Low->getValue() != Clusters[I - 1].High->getValue() + 1) { | |||
9749 | ContiguousRange = false; | |||
9750 | break; | |||
9751 | } | |||
9752 | } | |||
9753 | ||||
9754 | if (Low.isStrictlyPositive() && High.slt(BitWidth)) { | |||
9755 | // Optimize the case where all the case values fit in a word without having | |||
9756 | // to subtract minValue. In this case, we can optimize away the subtraction. | |||
9757 | LowBound = APInt::getNullValue(Low.getBitWidth()); | |||
9758 | CmpRange = High; | |||
9759 | ContiguousRange = false; | |||
9760 | } else { | |||
9761 | LowBound = Low; | |||
9762 | CmpRange = High - Low; | |||
9763 | } | |||
9764 | ||||
9765 | CaseBitsVector CBV; | |||
9766 | auto TotalProb = BranchProbability::getZero(); | |||
9767 | for (unsigned i = First; i <= Last; ++i) { | |||
9768 | // Find the CaseBits for this destination. | |||
9769 | unsigned j; | |||
9770 | for (j = 0; j < CBV.size(); ++j) | |||
9771 | if (CBV[j].BB == Clusters[i].MBB) | |||
9772 | break; | |||
9773 | if (j == CBV.size()) | |||
9774 | CBV.push_back( | |||
9775 | CaseBits(0, Clusters[i].MBB, 0, BranchProbability::getZero())); | |||
9776 | CaseBits *CB = &CBV[j]; | |||
9777 | ||||
9778 | // Update Mask, Bits and ExtraProb. | |||
9779 | uint64_t Lo = (Clusters[i].Low->getValue() - LowBound).getZExtValue(); | |||
9780 | uint64_t Hi = (Clusters[i].High->getValue() - LowBound).getZExtValue(); | |||
9781 | assert(Hi >= Lo && Hi < 64 && "Invalid bit case!")((Hi >= Lo && Hi < 64 && "Invalid bit case!" ) ? static_cast<void> (0) : __assert_fail ("Hi >= Lo && Hi < 64 && \"Invalid bit case!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9781, __PRETTY_FUNCTION__)); | |||
9782 | CB->Mask |= (-1ULL >> (63 - (Hi - Lo))) << Lo; | |||
9783 | CB->Bits += Hi - Lo + 1; | |||
9784 | CB->ExtraProb += Clusters[i].Prob; | |||
9785 | TotalProb += Clusters[i].Prob; | |||
9786 | } | |||
9787 | ||||
9788 | BitTestInfo BTI; | |||
9789 | llvm::sort(CBV, [](const CaseBits &a, const CaseBits &b) { | |||
9790 | // Sort by probability first, number of bits second, bit mask third. | |||
9791 | if (a.ExtraProb != b.ExtraProb) | |||
9792 | return a.ExtraProb > b.ExtraProb; | |||
9793 | if (a.Bits != b.Bits) | |||
9794 | return a.Bits > b.Bits; | |||
9795 | return a.Mask < b.Mask; | |||
9796 | }); | |||
9797 | ||||
9798 | for (auto &CB : CBV) { | |||
9799 | MachineBasicBlock *BitTestBB = | |||
9800 | FuncInfo.MF->CreateMachineBasicBlock(SI->getParent()); | |||
9801 | BTI.push_back(BitTestCase(CB.Mask, BitTestBB, CB.BB, CB.ExtraProb)); | |||
9802 | } | |||
9803 | BitTestCases.emplace_back(std::move(LowBound), std::move(CmpRange), | |||
9804 | SI->getCondition(), -1U, MVT::Other, false, | |||
9805 | ContiguousRange, nullptr, nullptr, std::move(BTI), | |||
9806 | TotalProb); | |||
9807 | ||||
9808 | BTCluster = CaseCluster::bitTests(Clusters[First].Low, Clusters[Last].High, | |||
9809 | BitTestCases.size() - 1, TotalProb); | |||
9810 | return true; | |||
9811 | } | |||
9812 | ||||
9813 | void SelectionDAGBuilder::findBitTestClusters(CaseClusterVector &Clusters, | |||
9814 | const SwitchInst *SI) { | |||
9815 | // Partition Clusters into as few subsets as possible, where each subset has a | |||
9816 | // range that fits in a machine word and has <= 3 unique destinations. | |||
9817 | ||||
9818 | #ifndef NDEBUG | |||
9819 | // Clusters must be sorted and contain Range or JumpTable clusters. | |||
9820 | assert(!Clusters.empty())((!Clusters.empty()) ? static_cast<void> (0) : __assert_fail ("!Clusters.empty()", "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9820, __PRETTY_FUNCTION__)); | |||
9821 | assert(Clusters[0].Kind == CC_Range || Clusters[0].Kind == CC_JumpTable)((Clusters[0].Kind == CC_Range || Clusters[0].Kind == CC_JumpTable ) ? static_cast<void> (0) : __assert_fail ("Clusters[0].Kind == CC_Range || Clusters[0].Kind == CC_JumpTable" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9821, __PRETTY_FUNCTION__)); | |||
9822 | for (const CaseCluster &C : Clusters) | |||
9823 | assert(C.Kind == CC_Range || C.Kind == CC_JumpTable)((C.Kind == CC_Range || C.Kind == CC_JumpTable) ? static_cast <void> (0) : __assert_fail ("C.Kind == CC_Range || C.Kind == CC_JumpTable" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9823, __PRETTY_FUNCTION__)); | |||
9824 | for (unsigned i = 1; i < Clusters.size(); ++i) | |||
9825 | assert(Clusters[i-1].High->getValue().slt(Clusters[i].Low->getValue()))((Clusters[i-1].High->getValue().slt(Clusters[i].Low->getValue ())) ? static_cast<void> (0) : __assert_fail ("Clusters[i-1].High->getValue().slt(Clusters[i].Low->getValue())" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9825, __PRETTY_FUNCTION__)); | |||
9826 | #endif | |||
9827 | ||||
9828 | // The algorithm below is not suitable for -O0. | |||
9829 | if (TM.getOptLevel() == CodeGenOpt::None) | |||
9830 | return; | |||
9831 | ||||
9832 | // If target does not have legal shift left, do not emit bit tests at all. | |||
9833 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
9834 | const DataLayout &DL = DAG.getDataLayout(); | |||
9835 | ||||
9836 | EVT PTy = TLI.getPointerTy(DL); | |||
9837 | if (!TLI.isOperationLegal(ISD::SHL, PTy)) | |||
9838 | return; | |||
9839 | ||||
9840 | int BitWidth = PTy.getSizeInBits(); | |||
9841 | const int64_t N = Clusters.size(); | |||
9842 | ||||
9843 | // MinPartitions[i] is the minimum nbr of partitions of Clusters[i..N-1]. | |||
9844 | SmallVector<unsigned, 8> MinPartitions(N); | |||
9845 | // LastElement[i] is the last element of the partition starting at i. | |||
9846 | SmallVector<unsigned, 8> LastElement(N); | |||
9847 | ||||
9848 | // FIXME: This might not be the best algorithm for finding bit test clusters. | |||
9849 | ||||
9850 | // Base case: There is only one way to partition Clusters[N-1]. | |||
9851 | MinPartitions[N - 1] = 1; | |||
9852 | LastElement[N - 1] = N - 1; | |||
9853 | ||||
9854 | // Note: loop indexes are signed to avoid underflow. | |||
9855 | for (int64_t i = N - 2; i >= 0; --i) { | |||
9856 | // Find optimal partitioning of Clusters[i..N-1]. | |||
9857 | // Baseline: Put Clusters[i] into a partition on its own. | |||
9858 | MinPartitions[i] = MinPartitions[i + 1] + 1; | |||
9859 | LastElement[i] = i; | |||
9860 | ||||
9861 | // Search for a solution that results in fewer partitions. | |||
9862 | // Note: the search is limited by BitWidth, reducing time complexity. | |||
9863 | for (int64_t j = std::min(N - 1, i + BitWidth - 1); j > i; --j) { | |||
9864 | // Try building a partition from Clusters[i..j]. | |||
9865 | ||||
9866 | // Check the range. | |||
9867 | if (!TLI.rangeFitsInWord(Clusters[i].Low->getValue(), | |||
9868 | Clusters[j].High->getValue(), DL)) | |||
9869 | continue; | |||
9870 | ||||
9871 | // Check nbr of destinations and cluster types. | |||
9872 | // FIXME: This works, but doesn't seem very efficient. | |||
9873 | bool RangesOnly = true; | |||
9874 | BitVector Dests(FuncInfo.MF->getNumBlockIDs()); | |||
9875 | for (int64_t k = i; k <= j; k++) { | |||
9876 | if (Clusters[k].Kind != CC_Range) { | |||
9877 | RangesOnly = false; | |||
9878 | break; | |||
9879 | } | |||
9880 | Dests.set(Clusters[k].MBB->getNumber()); | |||
9881 | } | |||
9882 | if (!RangesOnly || Dests.count() > 3) | |||
9883 | break; | |||
9884 | ||||
9885 | // Check if it's a better partition. | |||
9886 | unsigned NumPartitions = 1 + (j == N - 1 ? 0 : MinPartitions[j + 1]); | |||
9887 | if (NumPartitions < MinPartitions[i]) { | |||
9888 | // Found a better partition. | |||
9889 | MinPartitions[i] = NumPartitions; | |||
9890 | LastElement[i] = j; | |||
9891 | } | |||
9892 | } | |||
9893 | } | |||
9894 | ||||
9895 | // Iterate over the partitions, replacing with bit-test clusters in-place. | |||
9896 | unsigned DstIndex = 0; | |||
9897 | for (unsigned First = 0, Last; First < N; First = Last + 1) { | |||
9898 | Last = LastElement[First]; | |||
9899 | assert(First <= Last)((First <= Last) ? static_cast<void> (0) : __assert_fail ("First <= Last", "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9899, __PRETTY_FUNCTION__)); | |||
9900 | assert(DstIndex <= First)((DstIndex <= First) ? static_cast<void> (0) : __assert_fail ("DstIndex <= First", "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 9900, __PRETTY_FUNCTION__)); | |||
9901 | ||||
9902 | CaseCluster BitTestCluster; | |||
9903 | if (buildBitTests(Clusters, First, Last, SI, BitTestCluster)) { | |||
9904 | Clusters[DstIndex++] = BitTestCluster; | |||
9905 | } else { | |||
9906 | size_t NumClusters = Last - First + 1; | |||
9907 | std::memmove(&Clusters[DstIndex], &Clusters[First], | |||
9908 | sizeof(Clusters[0]) * NumClusters); | |||
9909 | DstIndex += NumClusters; | |||
9910 | } | |||
9911 | } | |||
9912 | Clusters.resize(DstIndex); | |||
9913 | } | |||
9914 | ||||
9915 | void SelectionDAGBuilder::lowerWorkItem(SwitchWorkListItem W, Value *Cond, | |||
9916 | MachineBasicBlock *SwitchMBB, | |||
9917 | MachineBasicBlock *DefaultMBB) { | |||
9918 | MachineFunction *CurMF = FuncInfo.MF; | |||
9919 | MachineBasicBlock *NextMBB = nullptr; | |||
9920 | MachineFunction::iterator BBI(W.MBB); | |||
9921 | if (++BBI != FuncInfo.MF->end()) | |||
9922 | NextMBB = &*BBI; | |||
9923 | ||||
9924 | unsigned Size = W.LastCluster - W.FirstCluster + 1; | |||
9925 | ||||
9926 | BranchProbabilityInfo *BPI = FuncInfo.BPI; | |||
9927 | ||||
9928 | if (Size == 2 && W.MBB == SwitchMBB) { | |||
9929 | // If any two of the cases has the same destination, and if one value | |||
9930 | // is the same as the other, but has one bit unset that the other has set, | |||
9931 | // use bit manipulation to do two compares at once. For example: | |||
9932 | // "if (X == 6 || X == 4)" -> "if ((X|2) == 6)" | |||
9933 | // TODO: This could be extended to merge any 2 cases in switches with 3 | |||
9934 | // cases. | |||
9935 | // TODO: Handle cases where W.CaseBB != SwitchBB. | |||
9936 | CaseCluster &Small = *W.FirstCluster; | |||
9937 | CaseCluster &Big = *W.LastCluster; | |||
9938 | ||||
9939 | if (Small.Low == Small.High && Big.Low == Big.High && | |||
9940 | Small.MBB == Big.MBB) { | |||
9941 | const APInt &SmallValue = Small.Low->getValue(); | |||
9942 | const APInt &BigValue = Big.Low->getValue(); | |||
9943 | ||||
9944 | // Check that there is only one bit different. | |||
9945 | APInt CommonBit = BigValue ^ SmallValue; | |||
9946 | if (CommonBit.isPowerOf2()) { | |||
9947 | SDValue CondLHS = getValue(Cond); | |||
9948 | EVT VT = CondLHS.getValueType(); | |||
9949 | SDLoc DL = getCurSDLoc(); | |||
9950 | ||||
9951 | SDValue Or = DAG.getNode(ISD::OR, DL, VT, CondLHS, | |||
9952 | DAG.getConstant(CommonBit, DL, VT)); | |||
9953 | SDValue Cond = DAG.getSetCC( | |||
9954 | DL, MVT::i1, Or, DAG.getConstant(BigValue | SmallValue, DL, VT), | |||
9955 | ISD::SETEQ); | |||
9956 | ||||
9957 | // Update successor info. | |||
9958 | // Both Small and Big will jump to Small.BB, so we sum up the | |||
9959 | // probabilities. | |||
9960 | addSuccessorWithProb(SwitchMBB, Small.MBB, Small.Prob + Big.Prob); | |||
9961 | if (BPI) | |||
9962 | addSuccessorWithProb( | |||
9963 | SwitchMBB, DefaultMBB, | |||
9964 | // The default destination is the first successor in IR. | |||
9965 | BPI->getEdgeProbability(SwitchMBB->getBasicBlock(), (unsigned)0)); | |||
9966 | else | |||
9967 | addSuccessorWithProb(SwitchMBB, DefaultMBB); | |||
9968 | ||||
9969 | // Insert the true branch. | |||
9970 | SDValue BrCond = | |||
9971 | DAG.getNode(ISD::BRCOND, DL, MVT::Other, getControlRoot(), Cond, | |||
9972 | DAG.getBasicBlock(Small.MBB)); | |||
9973 | // Insert the false branch. | |||
9974 | BrCond = DAG.getNode(ISD::BR, DL, MVT::Other, BrCond, | |||
9975 | DAG.getBasicBlock(DefaultMBB)); | |||
9976 | ||||
9977 | DAG.setRoot(BrCond); | |||
9978 | return; | |||
9979 | } | |||
9980 | } | |||
9981 | } | |||
9982 | ||||
9983 | if (TM.getOptLevel() != CodeGenOpt::None) { | |||
9984 | // Here, we order cases by probability so the most likely case will be | |||
9985 | // checked first. However, two clusters can have the same probability in | |||
9986 | // which case their relative ordering is non-deterministic. So we use Low | |||
9987 | // as a tie-breaker as clusters are guaranteed to never overlap. | |||
9988 | llvm::sort(W.FirstCluster, W.LastCluster + 1, | |||
9989 | [](const CaseCluster &a, const CaseCluster &b) { | |||
9990 | return a.Prob != b.Prob ? | |||
9991 | a.Prob > b.Prob : | |||
9992 | a.Low->getValue().slt(b.Low->getValue()); | |||
9993 | }); | |||
9994 | ||||
9995 | // Rearrange the case blocks so that the last one falls through if possible | |||
9996 | // without changing the order of probabilities. | |||
9997 | for (CaseClusterIt I = W.LastCluster; I > W.FirstCluster; ) { | |||
9998 | --I; | |||
9999 | if (I->Prob > W.LastCluster->Prob) | |||
10000 | break; | |||
10001 | if (I->Kind == CC_Range && I->MBB == NextMBB) { | |||
10002 | std::swap(*I, *W.LastCluster); | |||
10003 | break; | |||
10004 | } | |||
10005 | } | |||
10006 | } | |||
10007 | ||||
10008 | // Compute total probability. | |||
10009 | BranchProbability DefaultProb = W.DefaultProb; | |||
10010 | BranchProbability UnhandledProbs = DefaultProb; | |||
10011 | for (CaseClusterIt I = W.FirstCluster; I <= W.LastCluster; ++I) | |||
10012 | UnhandledProbs += I->Prob; | |||
10013 | ||||
10014 | MachineBasicBlock *CurMBB = W.MBB; | |||
10015 | for (CaseClusterIt I = W.FirstCluster, E = W.LastCluster; I <= E; ++I) { | |||
10016 | MachineBasicBlock *Fallthrough; | |||
10017 | if (I == W.LastCluster) { | |||
10018 | // For the last cluster, fall through to the default destination. | |||
10019 | Fallthrough = DefaultMBB; | |||
10020 | } else { | |||
10021 | Fallthrough = CurMF->CreateMachineBasicBlock(CurMBB->getBasicBlock()); | |||
10022 | CurMF->insert(BBI, Fallthrough); | |||
10023 | // Put Cond in a virtual register to make it available from the new blocks. | |||
10024 | ExportFromCurrentBlock(Cond); | |||
10025 | } | |||
10026 | UnhandledProbs -= I->Prob; | |||
10027 | ||||
10028 | switch (I->Kind) { | |||
10029 | case CC_JumpTable: { | |||
10030 | // FIXME: Optimize away range check based on pivot comparisons. | |||
10031 | JumpTableHeader *JTH = &JTCases[I->JTCasesIndex].first; | |||
10032 | JumpTable *JT = &JTCases[I->JTCasesIndex].second; | |||
10033 | ||||
10034 | // The jump block hasn't been inserted yet; insert it here. | |||
10035 | MachineBasicBlock *JumpMBB = JT->MBB; | |||
10036 | CurMF->insert(BBI, JumpMBB); | |||
10037 | ||||
10038 | auto JumpProb = I->Prob; | |||
10039 | auto FallthroughProb = UnhandledProbs; | |||
10040 | ||||
10041 | // If the default statement is a target of the jump table, we evenly | |||
10042 | // distribute the default probability to successors of CurMBB. Also | |||
10043 | // update the probability on the edge from JumpMBB to Fallthrough. | |||
10044 | for (MachineBasicBlock::succ_iterator SI = JumpMBB->succ_begin(), | |||
10045 | SE = JumpMBB->succ_end(); | |||
10046 | SI != SE; ++SI) { | |||
10047 | if (*SI == DefaultMBB) { | |||
10048 | JumpProb += DefaultProb / 2; | |||
10049 | FallthroughProb -= DefaultProb / 2; | |||
10050 | JumpMBB->setSuccProbability(SI, DefaultProb / 2); | |||
10051 | JumpMBB->normalizeSuccProbs(); | |||
10052 | break; | |||
10053 | } | |||
10054 | } | |||
10055 | ||||
10056 | addSuccessorWithProb(CurMBB, Fallthrough, FallthroughProb); | |||
10057 | addSuccessorWithProb(CurMBB, JumpMBB, JumpProb); | |||
10058 | CurMBB->normalizeSuccProbs(); | |||
10059 | ||||
10060 | // The jump table header will be inserted in our current block, do the | |||
10061 | // range check, and fall through to our fallthrough block. | |||
10062 | JTH->HeaderBB = CurMBB; | |||
10063 | JT->Default = Fallthrough; // FIXME: Move Default to JumpTableHeader. | |||
10064 | ||||
10065 | // If we're in the right place, emit the jump table header right now. | |||
10066 | if (CurMBB == SwitchMBB) { | |||
10067 | visitJumpTableHeader(*JT, *JTH, SwitchMBB); | |||
10068 | JTH->Emitted = true; | |||
10069 | } | |||
10070 | break; | |||
10071 | } | |||
10072 | case CC_BitTests: { | |||
10073 | // FIXME: Optimize away range check based on pivot comparisons. | |||
10074 | BitTestBlock *BTB = &BitTestCases[I->BTCasesIndex]; | |||
10075 | ||||
10076 | // The bit test blocks haven't been inserted yet; insert them here. | |||
10077 | for (BitTestCase &BTC : BTB->Cases) | |||
10078 | CurMF->insert(BBI, BTC.ThisBB); | |||
10079 | ||||
10080 | // Fill in fields of the BitTestBlock. | |||
10081 | BTB->Parent = CurMBB; | |||
10082 | BTB->Default = Fallthrough; | |||
10083 | ||||
10084 | BTB->DefaultProb = UnhandledProbs; | |||
10085 | // If the cases in bit test don't form a contiguous range, we evenly | |||
10086 | // distribute the probability on the edge to Fallthrough to two | |||
10087 | // successors of CurMBB. | |||
10088 | if (!BTB->ContiguousRange) { | |||
10089 | BTB->Prob += DefaultProb / 2; | |||
10090 | BTB->DefaultProb -= DefaultProb / 2; | |||
10091 | } | |||
10092 | ||||
10093 | // If we're in the right place, emit the bit test header right now. | |||
10094 | if (CurMBB == SwitchMBB) { | |||
10095 | visitBitTestHeader(*BTB, SwitchMBB); | |||
10096 | BTB->Emitted = true; | |||
10097 | } | |||
10098 | break; | |||
10099 | } | |||
10100 | case CC_Range: { | |||
10101 | const Value *RHS, *LHS, *MHS; | |||
10102 | ISD::CondCode CC; | |||
10103 | if (I->Low == I->High) { | |||
10104 | // Check Cond == I->Low. | |||
10105 | CC = ISD::SETEQ; | |||
10106 | LHS = Cond; | |||
10107 | RHS=I->Low; | |||
10108 | MHS = nullptr; | |||
10109 | } else { | |||
10110 | // Check I->Low <= Cond <= I->High. | |||
10111 | CC = ISD::SETLE; | |||
10112 | LHS = I->Low; | |||
10113 | MHS = Cond; | |||
10114 | RHS = I->High; | |||
10115 | } | |||
10116 | ||||
10117 | // The false probability is the sum of all unhandled cases. | |||
10118 | CaseBlock CB(CC, LHS, RHS, MHS, I->MBB, Fallthrough, CurMBB, | |||
10119 | getCurSDLoc(), I->Prob, UnhandledProbs); | |||
10120 | ||||
10121 | if (CurMBB == SwitchMBB) | |||
10122 | visitSwitchCase(CB, SwitchMBB); | |||
10123 | else | |||
10124 | SwitchCases.push_back(CB); | |||
10125 | ||||
10126 | break; | |||
10127 | } | |||
10128 | } | |||
10129 | CurMBB = Fallthrough; | |||
10130 | } | |||
10131 | } | |||
10132 | ||||
10133 | unsigned SelectionDAGBuilder::caseClusterRank(const CaseCluster &CC, | |||
10134 | CaseClusterIt First, | |||
10135 | CaseClusterIt Last) { | |||
10136 | return std::count_if(First, Last + 1, [&](const CaseCluster &X) { | |||
10137 | if (X.Prob != CC.Prob) | |||
10138 | return X.Prob > CC.Prob; | |||
10139 | ||||
10140 | // Ties are broken by comparing the case value. | |||
10141 | return X.Low->getValue().slt(CC.Low->getValue()); | |||
10142 | }); | |||
10143 | } | |||
10144 | ||||
10145 | void SelectionDAGBuilder::splitWorkItem(SwitchWorkList &WorkList, | |||
10146 | const SwitchWorkListItem &W, | |||
10147 | Value *Cond, | |||
10148 | MachineBasicBlock *SwitchMBB) { | |||
10149 | assert(W.FirstCluster->Low->getValue().slt(W.LastCluster->Low->getValue()) &&((W.FirstCluster->Low->getValue().slt(W.LastCluster-> Low->getValue()) && "Clusters not sorted?") ? static_cast <void> (0) : __assert_fail ("W.FirstCluster->Low->getValue().slt(W.LastCluster->Low->getValue()) && \"Clusters not sorted?\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 10150, __PRETTY_FUNCTION__)) | |||
10150 | "Clusters not sorted?")((W.FirstCluster->Low->getValue().slt(W.LastCluster-> Low->getValue()) && "Clusters not sorted?") ? static_cast <void> (0) : __assert_fail ("W.FirstCluster->Low->getValue().slt(W.LastCluster->Low->getValue()) && \"Clusters not sorted?\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 10150, __PRETTY_FUNCTION__)); | |||
10151 | ||||
10152 | assert(W.LastCluster - W.FirstCluster + 1 >= 2 && "Too small to split!")((W.LastCluster - W.FirstCluster + 1 >= 2 && "Too small to split!" ) ? static_cast<void> (0) : __assert_fail ("W.LastCluster - W.FirstCluster + 1 >= 2 && \"Too small to split!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 10152, __PRETTY_FUNCTION__)); | |||
10153 | ||||
10154 | // Balance the tree based on branch probabilities to create a near-optimal (in | |||
10155 | // terms of search time given key frequency) binary search tree. See e.g. Kurt | |||
10156 | // Mehlhorn "Nearly Optimal Binary Search Trees" (1975). | |||
10157 | CaseClusterIt LastLeft = W.FirstCluster; | |||
10158 | CaseClusterIt FirstRight = W.LastCluster; | |||
10159 | auto LeftProb = LastLeft->Prob + W.DefaultProb / 2; | |||
10160 | auto RightProb = FirstRight->Prob + W.DefaultProb / 2; | |||
10161 | ||||
10162 | // Move LastLeft and FirstRight towards each other from opposite directions to | |||
10163 | // find a partitioning of the clusters which balances the probability on both | |||
10164 | // sides. If LeftProb and RightProb are equal, alternate which side is | |||
10165 | // taken to ensure 0-probability nodes are distributed evenly. | |||
10166 | unsigned I = 0; | |||
10167 | while (LastLeft + 1 < FirstRight) { | |||
10168 | if (LeftProb < RightProb || (LeftProb == RightProb && (I & 1))) | |||
10169 | LeftProb += (++LastLeft)->Prob; | |||
10170 | else | |||
10171 | RightProb += (--FirstRight)->Prob; | |||
10172 | I++; | |||
10173 | } | |||
10174 | ||||
10175 | while (true) { | |||
10176 | // Our binary search tree differs from a typical BST in that ours can have up | |||
10177 | // to three values in each leaf. The pivot selection above doesn't take that | |||
10178 | // into account, which means the tree might require more nodes and be less | |||
10179 | // efficient. We compensate for this here. | |||
10180 | ||||
10181 | unsigned NumLeft = LastLeft - W.FirstCluster + 1; | |||
10182 | unsigned NumRight = W.LastCluster - FirstRight + 1; | |||
10183 | ||||
10184 | if (std::min(NumLeft, NumRight) < 3 && std::max(NumLeft, NumRight) > 3) { | |||
10185 | // If one side has less than 3 clusters, and the other has more than 3, | |||
10186 | // consider taking a cluster from the other side. | |||
10187 | ||||
10188 | if (NumLeft < NumRight) { | |||
10189 | // Consider moving the first cluster on the right to the left side. | |||
10190 | CaseCluster &CC = *FirstRight; | |||
10191 | unsigned RightSideRank = caseClusterRank(CC, FirstRight, W.LastCluster); | |||
10192 | unsigned LeftSideRank = caseClusterRank(CC, W.FirstCluster, LastLeft); | |||
10193 | if (LeftSideRank <= RightSideRank) { | |||
10194 | // Moving the cluster to the left does not demote it. | |||
10195 | ++LastLeft; | |||
10196 | ++FirstRight; | |||
10197 | continue; | |||
10198 | } | |||
10199 | } else { | |||
10200 | assert(NumRight < NumLeft)((NumRight < NumLeft) ? static_cast<void> (0) : __assert_fail ("NumRight < NumLeft", "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 10200, __PRETTY_FUNCTION__)); | |||
10201 | // Consider moving the last element on the left to the right side. | |||
10202 | CaseCluster &CC = *LastLeft; | |||
10203 | unsigned LeftSideRank = caseClusterRank(CC, W.FirstCluster, LastLeft); | |||
10204 | unsigned RightSideRank = caseClusterRank(CC, FirstRight, W.LastCluster); | |||
10205 | if (RightSideRank <= LeftSideRank) { | |||
10206 | // Moving the cluster to the right does not demot it. | |||
10207 | --LastLeft; | |||
10208 | --FirstRight; | |||
10209 | continue; | |||
10210 | } | |||
10211 | } | |||
10212 | } | |||
10213 | break; | |||
10214 | } | |||
10215 | ||||
10216 | assert(LastLeft + 1 == FirstRight)((LastLeft + 1 == FirstRight) ? static_cast<void> (0) : __assert_fail ("LastLeft + 1 == FirstRight", "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 10216, __PRETTY_FUNCTION__)); | |||
10217 | assert(LastLeft >= W.FirstCluster)((LastLeft >= W.FirstCluster) ? static_cast<void> (0 ) : __assert_fail ("LastLeft >= W.FirstCluster", "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 10217, __PRETTY_FUNCTION__)); | |||
10218 | assert(FirstRight <= W.LastCluster)((FirstRight <= W.LastCluster) ? static_cast<void> ( 0) : __assert_fail ("FirstRight <= W.LastCluster", "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 10218, __PRETTY_FUNCTION__)); | |||
10219 | ||||
10220 | // Use the first element on the right as pivot since we will make less-than | |||
10221 | // comparisons against it. | |||
10222 | CaseClusterIt PivotCluster = FirstRight; | |||
10223 | assert(PivotCluster > W.FirstCluster)((PivotCluster > W.FirstCluster) ? static_cast<void> (0) : __assert_fail ("PivotCluster > W.FirstCluster", "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 10223, __PRETTY_FUNCTION__)); | |||
10224 | assert(PivotCluster <= W.LastCluster)((PivotCluster <= W.LastCluster) ? static_cast<void> (0) : __assert_fail ("PivotCluster <= W.LastCluster", "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 10224, __PRETTY_FUNCTION__)); | |||
10225 | ||||
10226 | CaseClusterIt FirstLeft = W.FirstCluster; | |||
10227 | CaseClusterIt LastRight = W.LastCluster; | |||
10228 | ||||
10229 | const ConstantInt *Pivot = PivotCluster->Low; | |||
10230 | ||||
10231 | // New blocks will be inserted immediately after the current one. | |||
10232 | MachineFunction::iterator BBI(W.MBB); | |||
10233 | ++BBI; | |||
10234 | ||||
10235 | // We will branch to the LHS if Value < Pivot. If LHS is a single cluster, | |||
10236 | // we can branch to its destination directly if it's squeezed exactly in | |||
10237 | // between the known lower bound and Pivot - 1. | |||
10238 | MachineBasicBlock *LeftMBB; | |||
10239 | if (FirstLeft == LastLeft && FirstLeft->Kind == CC_Range && | |||
10240 | FirstLeft->Low == W.GE && | |||
10241 | (FirstLeft->High->getValue() + 1LL) == Pivot->getValue()) { | |||
10242 | LeftMBB = FirstLeft->MBB; | |||
10243 | } else { | |||
10244 | LeftMBB = FuncInfo.MF->CreateMachineBasicBlock(W.MBB->getBasicBlock()); | |||
10245 | FuncInfo.MF->insert(BBI, LeftMBB); | |||
10246 | WorkList.push_back( | |||
10247 | {LeftMBB, FirstLeft, LastLeft, W.GE, Pivot, W.DefaultProb / 2}); | |||
10248 | // Put Cond in a virtual register to make it available from the new blocks. | |||
10249 | ExportFromCurrentBlock(Cond); | |||
10250 | } | |||
10251 | ||||
10252 | // Similarly, we will branch to the RHS if Value >= Pivot. If RHS is a | |||
10253 | // single cluster, RHS.Low == Pivot, and we can branch to its destination | |||
10254 | // directly if RHS.High equals the current upper bound. | |||
10255 | MachineBasicBlock *RightMBB; | |||
10256 | if (FirstRight == LastRight && FirstRight->Kind == CC_Range && | |||
10257 | W.LT && (FirstRight->High->getValue() + 1ULL) == W.LT->getValue()) { | |||
10258 | RightMBB = FirstRight->MBB; | |||
10259 | } else { | |||
10260 | RightMBB = FuncInfo.MF->CreateMachineBasicBlock(W.MBB->getBasicBlock()); | |||
10261 | FuncInfo.MF->insert(BBI, RightMBB); | |||
10262 | WorkList.push_back( | |||
10263 | {RightMBB, FirstRight, LastRight, Pivot, W.LT, W.DefaultProb / 2}); | |||
10264 | // Put Cond in a virtual register to make it available from the new blocks. | |||
10265 | ExportFromCurrentBlock(Cond); | |||
10266 | } | |||
10267 | ||||
10268 | // Create the CaseBlock record that will be used to lower the branch. | |||
10269 | CaseBlock CB(ISD::SETLT, Cond, Pivot, nullptr, LeftMBB, RightMBB, W.MBB, | |||
10270 | getCurSDLoc(), LeftProb, RightProb); | |||
10271 | ||||
10272 | if (W.MBB == SwitchMBB) | |||
10273 | visitSwitchCase(CB, SwitchMBB); | |||
10274 | else | |||
10275 | SwitchCases.push_back(CB); | |||
10276 | } | |||
10277 | ||||
10278 | // Scale CaseProb after peeling a case with the probablity of PeeledCaseProb | |||
10279 | // from the swith statement. | |||
10280 | static BranchProbability scaleCaseProbality(BranchProbability CaseProb, | |||
10281 | BranchProbability PeeledCaseProb) { | |||
10282 | if (PeeledCaseProb == BranchProbability::getOne()) | |||
10283 | return BranchProbability::getZero(); | |||
10284 | BranchProbability SwitchProb = PeeledCaseProb.getCompl(); | |||
10285 | ||||
10286 | uint32_t Numerator = CaseProb.getNumerator(); | |||
10287 | uint32_t Denominator = SwitchProb.scale(CaseProb.getDenominator()); | |||
10288 | return BranchProbability(Numerator, std::max(Numerator, Denominator)); | |||
10289 | } | |||
10290 | ||||
10291 | // Try to peel the top probability case if it exceeds the threshold. | |||
10292 | // Return current MachineBasicBlock for the switch statement if the peeling | |||
10293 | // does not occur. | |||
10294 | // If the peeling is performed, return the newly created MachineBasicBlock | |||
10295 | // for the peeled switch statement. Also update Clusters to remove the peeled | |||
10296 | // case. PeeledCaseProb is the BranchProbability for the peeled case. | |||
10297 | MachineBasicBlock *SelectionDAGBuilder::peelDominantCaseCluster( | |||
10298 | const SwitchInst &SI, CaseClusterVector &Clusters, | |||
10299 | BranchProbability &PeeledCaseProb) { | |||
10300 | MachineBasicBlock *SwitchMBB = FuncInfo.MBB; | |||
10301 | // Don't perform if there is only one cluster or optimizing for size. | |||
10302 | if (SwitchPeelThreshold > 100 || !FuncInfo.BPI || Clusters.size() < 2 || | |||
10303 | TM.getOptLevel() == CodeGenOpt::None || | |||
10304 | SwitchMBB->getParent()->getFunction().optForMinSize()) | |||
10305 | return SwitchMBB; | |||
10306 | ||||
10307 | BranchProbability TopCaseProb = BranchProbability(SwitchPeelThreshold, 100); | |||
10308 | unsigned PeeledCaseIndex = 0; | |||
10309 | bool SwitchPeeled = false; | |||
10310 | for (unsigned Index = 0; Index < Clusters.size(); ++Index) { | |||
10311 | CaseCluster &CC = Clusters[Index]; | |||
10312 | if (CC.Prob < TopCaseProb) | |||
10313 | continue; | |||
10314 | TopCaseProb = CC.Prob; | |||
10315 | PeeledCaseIndex = Index; | |||
10316 | SwitchPeeled = true; | |||
10317 | } | |||
10318 | if (!SwitchPeeled) | |||
10319 | return SwitchMBB; | |||
10320 | ||||
10321 | LLVM_DEBUG(dbgs() << "Peeled one top case in switch stmt, prob: "do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { dbgs() << "Peeled one top case in switch stmt, prob: " << TopCaseProb << "\n"; } } while (false) | |||
10322 | << TopCaseProb << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { dbgs() << "Peeled one top case in switch stmt, prob: " << TopCaseProb << "\n"; } } while (false); | |||
10323 | ||||
10324 | // Record the MBB for the peeled switch statement. | |||
10325 | MachineFunction::iterator BBI(SwitchMBB); | |||
10326 | ++BBI; | |||
10327 | MachineBasicBlock *PeeledSwitchMBB = | |||
10328 | FuncInfo.MF->CreateMachineBasicBlock(SwitchMBB->getBasicBlock()); | |||
10329 | FuncInfo.MF->insert(BBI, PeeledSwitchMBB); | |||
10330 | ||||
10331 | ExportFromCurrentBlock(SI.getCondition()); | |||
10332 | auto PeeledCaseIt = Clusters.begin() + PeeledCaseIndex; | |||
10333 | SwitchWorkListItem W = {SwitchMBB, PeeledCaseIt, PeeledCaseIt, | |||
10334 | nullptr, nullptr, TopCaseProb.getCompl()}; | |||
10335 | lowerWorkItem(W, SI.getCondition(), SwitchMBB, PeeledSwitchMBB); | |||
10336 | ||||
10337 | Clusters.erase(PeeledCaseIt); | |||
10338 | for (CaseCluster &CC : Clusters) { | |||
10339 | LLVM_DEBUG(do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { dbgs() << "Scale the probablity for one cluster, before scaling: " << CC.Prob << "\n"; } } while (false) | |||
10340 | dbgs() << "Scale the probablity for one cluster, before scaling: "do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { dbgs() << "Scale the probablity for one cluster, before scaling: " << CC.Prob << "\n"; } } while (false) | |||
10341 | << CC.Prob << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { dbgs() << "Scale the probablity for one cluster, before scaling: " << CC.Prob << "\n"; } } while (false); | |||
10342 | CC.Prob = scaleCaseProbality(CC.Prob, TopCaseProb); | |||
10343 | LLVM_DEBUG(dbgs() << "After scaling: " << CC.Prob << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { dbgs() << "After scaling: " << CC.Prob << "\n"; } } while (false); | |||
10344 | } | |||
10345 | PeeledCaseProb = TopCaseProb; | |||
10346 | return PeeledSwitchMBB; | |||
10347 | } | |||
10348 | ||||
10349 | void SelectionDAGBuilder::visitSwitch(const SwitchInst &SI) { | |||
10350 | // Extract cases from the switch. | |||
10351 | BranchProbabilityInfo *BPI = FuncInfo.BPI; | |||
10352 | CaseClusterVector Clusters; | |||
10353 | Clusters.reserve(SI.getNumCases()); | |||
10354 | for (auto I : SI.cases()) { | |||
10355 | MachineBasicBlock *Succ = FuncInfo.MBBMap[I.getCaseSuccessor()]; | |||
10356 | const ConstantInt *CaseVal = I.getCaseValue(); | |||
10357 | BranchProbability Prob = | |||
10358 | BPI ? BPI->getEdgeProbability(SI.getParent(), I.getSuccessorIndex()) | |||
10359 | : BranchProbability(1, SI.getNumCases() + 1); | |||
10360 | Clusters.push_back(CaseCluster::range(CaseVal, CaseVal, Succ, Prob)); | |||
10361 | } | |||
10362 | ||||
10363 | MachineBasicBlock *DefaultMBB = FuncInfo.MBBMap[SI.getDefaultDest()]; | |||
10364 | ||||
10365 | // Cluster adjacent cases with the same destination. We do this at all | |||
10366 | // optimization levels because it's cheap to do and will make codegen faster | |||
10367 | // if there are many clusters. | |||
10368 | sortAndRangeify(Clusters); | |||
10369 | ||||
10370 | if (TM.getOptLevel() != CodeGenOpt::None) { | |||
10371 | // Replace an unreachable default with the most popular destination. | |||
10372 | // FIXME: Exploit unreachable default more aggressively. | |||
10373 | bool UnreachableDefault = | |||
10374 | isa<UnreachableInst>(SI.getDefaultDest()->getFirstNonPHIOrDbg()); | |||
10375 | if (UnreachableDefault && !Clusters.empty()) { | |||
10376 | DenseMap<const BasicBlock *, unsigned> Popularity; | |||
10377 | unsigned MaxPop = 0; | |||
10378 | const BasicBlock *MaxBB = nullptr; | |||
10379 | for (auto I : SI.cases()) { | |||
10380 | const BasicBlock *BB = I.getCaseSuccessor(); | |||
10381 | if (++Popularity[BB] > MaxPop) { | |||
10382 | MaxPop = Popularity[BB]; | |||
10383 | MaxBB = BB; | |||
10384 | } | |||
10385 | } | |||
10386 | // Set new default. | |||
10387 | assert(MaxPop > 0 && MaxBB)((MaxPop > 0 && MaxBB) ? static_cast<void> ( 0) : __assert_fail ("MaxPop > 0 && MaxBB", "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 10387, __PRETTY_FUNCTION__)); | |||
10388 | DefaultMBB = FuncInfo.MBBMap[MaxBB]; | |||
10389 | ||||
10390 | // Remove cases that were pointing to the destination that is now the | |||
10391 | // default. | |||
10392 | CaseClusterVector New; | |||
10393 | New.reserve(Clusters.size()); | |||
10394 | for (CaseCluster &CC : Clusters) { | |||
10395 | if (CC.MBB != DefaultMBB) | |||
10396 | New.push_back(CC); | |||
10397 | } | |||
10398 | Clusters = std::move(New); | |||
10399 | } | |||
10400 | } | |||
10401 | ||||
10402 | // The branch probablity of the peeled case. | |||
10403 | BranchProbability PeeledCaseProb = BranchProbability::getZero(); | |||
10404 | MachineBasicBlock *PeeledSwitchMBB = | |||
10405 | peelDominantCaseCluster(SI, Clusters, PeeledCaseProb); | |||
10406 | ||||
10407 | // If there is only the default destination, jump there directly. | |||
10408 | MachineBasicBlock *SwitchMBB = FuncInfo.MBB; | |||
10409 | if (Clusters.empty()) { | |||
10410 | assert(PeeledSwitchMBB == SwitchMBB)((PeeledSwitchMBB == SwitchMBB) ? static_cast<void> (0) : __assert_fail ("PeeledSwitchMBB == SwitchMBB", "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 10410, __PRETTY_FUNCTION__)); | |||
10411 | SwitchMBB->addSuccessor(DefaultMBB); | |||
10412 | if (DefaultMBB != NextBlock(SwitchMBB)) { | |||
10413 | DAG.setRoot(DAG.getNode(ISD::BR, getCurSDLoc(), MVT::Other, | |||
10414 | getControlRoot(), DAG.getBasicBlock(DefaultMBB))); | |||
10415 | } | |||
10416 | return; | |||
10417 | } | |||
10418 | ||||
10419 | findJumpTables(Clusters, &SI, DefaultMBB); | |||
10420 | findBitTestClusters(Clusters, &SI); | |||
10421 | ||||
10422 | LLVM_DEBUG({do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { { dbgs() << "Case clusters: "; for (const CaseCluster &C : Clusters) { if (C.Kind == CC_JumpTable) dbgs() << "JT:"; if (C.Kind == CC_BitTests) dbgs() << "BT:"; C.Low ->getValue().print(dbgs(), true); if (C.Low != C.High) { dbgs () << '-'; C.High->getValue().print(dbgs(), true); } dbgs() << ' '; } dbgs() << '\n'; }; } } while (false ) | |||
10423 | dbgs() << "Case clusters: ";do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { { dbgs() << "Case clusters: "; for (const CaseCluster &C : Clusters) { if (C.Kind == CC_JumpTable) dbgs() << "JT:"; if (C.Kind == CC_BitTests) dbgs() << "BT:"; C.Low ->getValue().print(dbgs(), true); if (C.Low != C.High) { dbgs () << '-'; C.High->getValue().print(dbgs(), true); } dbgs() << ' '; } dbgs() << '\n'; }; } } while (false ) | |||
10424 | for (const CaseCluster &C : Clusters) {do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { { dbgs() << "Case clusters: "; for (const CaseCluster &C : Clusters) { if (C.Kind == CC_JumpTable) dbgs() << "JT:"; if (C.Kind == CC_BitTests) dbgs() << "BT:"; C.Low ->getValue().print(dbgs(), true); if (C.Low != C.High) { dbgs () << '-'; C.High->getValue().print(dbgs(), true); } dbgs() << ' '; } dbgs() << '\n'; }; } } while (false ) | |||
10425 | if (C.Kind == CC_JumpTable)do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { { dbgs() << "Case clusters: "; for (const CaseCluster &C : Clusters) { if (C.Kind == CC_JumpTable) dbgs() << "JT:"; if (C.Kind == CC_BitTests) dbgs() << "BT:"; C.Low ->getValue().print(dbgs(), true); if (C.Low != C.High) { dbgs () << '-'; C.High->getValue().print(dbgs(), true); } dbgs() << ' '; } dbgs() << '\n'; }; } } while (false ) | |||
10426 | dbgs() << "JT:";do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { { dbgs() << "Case clusters: "; for (const CaseCluster &C : Clusters) { if (C.Kind == CC_JumpTable) dbgs() << "JT:"; if (C.Kind == CC_BitTests) dbgs() << "BT:"; C.Low ->getValue().print(dbgs(), true); if (C.Low != C.High) { dbgs () << '-'; C.High->getValue().print(dbgs(), true); } dbgs() << ' '; } dbgs() << '\n'; }; } } while (false ) | |||
10427 | if (C.Kind == CC_BitTests)do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { { dbgs() << "Case clusters: "; for (const CaseCluster &C : Clusters) { if (C.Kind == CC_JumpTable) dbgs() << "JT:"; if (C.Kind == CC_BitTests) dbgs() << "BT:"; C.Low ->getValue().print(dbgs(), true); if (C.Low != C.High) { dbgs () << '-'; C.High->getValue().print(dbgs(), true); } dbgs() << ' '; } dbgs() << '\n'; }; } } while (false ) | |||
10428 | dbgs() << "BT:";do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { { dbgs() << "Case clusters: "; for (const CaseCluster &C : Clusters) { if (C.Kind == CC_JumpTable) dbgs() << "JT:"; if (C.Kind == CC_BitTests) dbgs() << "BT:"; C.Low ->getValue().print(dbgs(), true); if (C.Low != C.High) { dbgs () << '-'; C.High->getValue().print(dbgs(), true); } dbgs() << ' '; } dbgs() << '\n'; }; } } while (false ) | |||
10429 | ||||
10430 | C.Low->getValue().print(dbgs(), true);do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { { dbgs() << "Case clusters: "; for (const CaseCluster &C : Clusters) { if (C.Kind == CC_JumpTable) dbgs() << "JT:"; if (C.Kind == CC_BitTests) dbgs() << "BT:"; C.Low ->getValue().print(dbgs(), true); if (C.Low != C.High) { dbgs () << '-'; C.High->getValue().print(dbgs(), true); } dbgs() << ' '; } dbgs() << '\n'; }; } } while (false ) | |||
10431 | if (C.Low != C.High) {do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { { dbgs() << "Case clusters: "; for (const CaseCluster &C : Clusters) { if (C.Kind == CC_JumpTable) dbgs() << "JT:"; if (C.Kind == CC_BitTests) dbgs() << "BT:"; C.Low ->getValue().print(dbgs(), true); if (C.Low != C.High) { dbgs () << '-'; C.High->getValue().print(dbgs(), true); } dbgs() << ' '; } dbgs() << '\n'; }; } } while (false ) | |||
10432 | dbgs() << '-';do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { { dbgs() << "Case clusters: "; for (const CaseCluster &C : Clusters) { if (C.Kind == CC_JumpTable) dbgs() << "JT:"; if (C.Kind == CC_BitTests) dbgs() << "BT:"; C.Low ->getValue().print(dbgs(), true); if (C.Low != C.High) { dbgs () << '-'; C.High->getValue().print(dbgs(), true); } dbgs() << ' '; } dbgs() << '\n'; }; } } while (false ) | |||
10433 | C.High->getValue().print(dbgs(), true);do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { { dbgs() << "Case clusters: "; for (const CaseCluster &C : Clusters) { if (C.Kind == CC_JumpTable) dbgs() << "JT:"; if (C.Kind == CC_BitTests) dbgs() << "BT:"; C.Low ->getValue().print(dbgs(), true); if (C.Low != C.High) { dbgs () << '-'; C.High->getValue().print(dbgs(), true); } dbgs() << ' '; } dbgs() << '\n'; }; } } while (false ) | |||
10434 | }do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { { dbgs() << "Case clusters: "; for (const CaseCluster &C : Clusters) { if (C.Kind == CC_JumpTable) dbgs() << "JT:"; if (C.Kind == CC_BitTests) dbgs() << "BT:"; C.Low ->getValue().print(dbgs(), true); if (C.Low != C.High) { dbgs () << '-'; C.High->getValue().print(dbgs(), true); } dbgs() << ' '; } dbgs() << '\n'; }; } } while (false ) | |||
10435 | dbgs() << ' ';do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { { dbgs() << "Case clusters: "; for (const CaseCluster &C : Clusters) { if (C.Kind == CC_JumpTable) dbgs() << "JT:"; if (C.Kind == CC_BitTests) dbgs() << "BT:"; C.Low ->getValue().print(dbgs(), true); if (C.Low != C.High) { dbgs () << '-'; C.High->getValue().print(dbgs(), true); } dbgs() << ' '; } dbgs() << '\n'; }; } } while (false ) | |||
10436 | }do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { { dbgs() << "Case clusters: "; for (const CaseCluster &C : Clusters) { if (C.Kind == CC_JumpTable) dbgs() << "JT:"; if (C.Kind == CC_BitTests) dbgs() << "BT:"; C.Low ->getValue().print(dbgs(), true); if (C.Low != C.High) { dbgs () << '-'; C.High->getValue().print(dbgs(), true); } dbgs() << ' '; } dbgs() << '\n'; }; } } while (false ) | |||
10437 | dbgs() << '\n';do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { { dbgs() << "Case clusters: "; for (const CaseCluster &C : Clusters) { if (C.Kind == CC_JumpTable) dbgs() << "JT:"; if (C.Kind == CC_BitTests) dbgs() << "BT:"; C.Low ->getValue().print(dbgs(), true); if (C.Low != C.High) { dbgs () << '-'; C.High->getValue().print(dbgs(), true); } dbgs() << ' '; } dbgs() << '\n'; }; } } while (false ) | |||
10438 | })do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("isel")) { { dbgs() << "Case clusters: "; for (const CaseCluster &C : Clusters) { if (C.Kind == CC_JumpTable) dbgs() << "JT:"; if (C.Kind == CC_BitTests) dbgs() << "BT:"; C.Low ->getValue().print(dbgs(), true); if (C.Low != C.High) { dbgs () << '-'; C.High->getValue().print(dbgs(), true); } dbgs() << ' '; } dbgs() << '\n'; }; } } while (false ); | |||
10439 | ||||
10440 | assert(!Clusters.empty())((!Clusters.empty()) ? static_cast<void> (0) : __assert_fail ("!Clusters.empty()", "/build/llvm-toolchain-snapshot-8~svn350071/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp" , 10440, __PRETTY_FUNCTION__)); | |||
10441 | SwitchWorkList WorkList; | |||
10442 | CaseClusterIt First = Clusters.begin(); | |||
10443 | CaseClusterIt Last = Clusters.end() - 1; | |||
10444 | auto DefaultProb = getEdgeProbability(PeeledSwitchMBB, DefaultMBB); | |||
10445 | // Scale the branchprobability for DefaultMBB if the peel occurs and | |||
10446 | // DefaultMBB is not replaced. | |||
10447 | if (PeeledCaseProb != BranchProbability::getZero() && | |||
10448 | DefaultMBB == FuncInfo.MBBMap[SI.getDefaultDest()]) | |||
10449 | DefaultProb = scaleCaseProbality(DefaultProb, PeeledCaseProb); | |||
10450 | WorkList.push_back( | |||
10451 | {PeeledSwitchMBB, First, Last, nullptr, nullptr, DefaultProb}); | |||
10452 | ||||
10453 | while (!WorkList.empty()) { | |||
10454 | SwitchWorkListItem W = WorkList.back(); | |||
10455 | WorkList.pop_back(); | |||
10456 | unsigned NumClusters = W.LastCluster - W.FirstCluster + 1; | |||
10457 | ||||
10458 | if (NumClusters > 3 && TM.getOptLevel() != CodeGenOpt::None && | |||
10459 | !DefaultMBB->getParent()->getFunction().optForMinSize()) { | |||
10460 | // For optimized builds, lower large range as a balanced binary tree. | |||
10461 | splitWorkItem(WorkList, W, SI.getCondition(), SwitchMBB); | |||
10462 | continue; | |||
10463 | } | |||
10464 | ||||
10465 | lowerWorkItem(W, SI.getCondition(), SwitchMBB, DefaultMBB); | |||
10466 | } | |||
10467 | } |