1 //===- llvm/Analysis/TargetTransformInfo.cpp ------------------------------===//
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 #include "llvm/Analysis/TargetTransformInfo.h"
11 #include "llvm/Analysis/TargetTransformInfoImpl.h"
12 #include "llvm/IR/CallSite.h"
13 #include "llvm/IR/DataLayout.h"
14 #include "llvm/IR/Instruction.h"
15 #include "llvm/IR/Instructions.h"
16 #include "llvm/IR/IntrinsicInst.h"
17 #include "llvm/IR/Module.h"
18 #include "llvm/IR/Operator.h"
19 #include "llvm/Support/ErrorHandling.h"
20 #include <utility>
21 
22 using namespace llvm;
23 
24 #define DEBUG_TYPE "tti"
25 
26 namespace {
27 /// \brief No-op implementation of the TTI interface using the utility base
28 /// classes.
29 ///
30 /// This is used when no target specific information is available.
31 struct NoTTIImpl : TargetTransformInfoImplCRTPBase<NoTTIImpl> {
32   explicit NoTTIImpl(const DataLayout &DL)
33       : TargetTransformInfoImplCRTPBase<NoTTIImpl>(DL) {}
34 };
35 }
36 
37 TargetTransformInfo::TargetTransformInfo(const DataLayout &DL)
38     : TTIImpl(new Model<NoTTIImpl>(NoTTIImpl(DL))) {}
39 
40 TargetTransformInfo::~TargetTransformInfo() {}
41 
42 TargetTransformInfo::TargetTransformInfo(TargetTransformInfo &&Arg)
43     : TTIImpl(std::move(Arg.TTIImpl)) {}
44 
45 TargetTransformInfo &TargetTransformInfo::operator=(TargetTransformInfo &&RHS) {
46   TTIImpl = std::move(RHS.TTIImpl);
47   return *this;
48 }
49 
50 int TargetTransformInfo::getOperationCost(unsigned Opcode, Type *Ty,
51                                           Type *OpTy) const {
52   int Cost = TTIImpl->getOperationCost(Opcode, Ty, OpTy);
53   assert(Cost >= 0 && "TTI should not produce negative costs!");
54   return Cost;
55 }
56 
57 int TargetTransformInfo::getCallCost(FunctionType *FTy, int NumArgs) const {
58   int Cost = TTIImpl->getCallCost(FTy, NumArgs);
59   assert(Cost >= 0 && "TTI should not produce negative costs!");
60   return Cost;
61 }
62 
63 int TargetTransformInfo::getCallCost(const Function *F,
64                                      ArrayRef<const Value *> Arguments) const {
65   int Cost = TTIImpl->getCallCost(F, Arguments);
66   assert(Cost >= 0 && "TTI should not produce negative costs!");
67   return Cost;
68 }
69 
70 unsigned TargetTransformInfo::getInliningThresholdMultiplier() const {
71   return TTIImpl->getInliningThresholdMultiplier();
72 }
73 
74 int TargetTransformInfo::getGEPCost(Type *PointeeType, const Value *Ptr,
75                                     ArrayRef<const Value *> Operands) const {
76   return TTIImpl->getGEPCost(PointeeType, Ptr, Operands);
77 }
78 
79 int TargetTransformInfo::getIntrinsicCost(
80     Intrinsic::ID IID, Type *RetTy, ArrayRef<const Value *> Arguments) const {
81   int Cost = TTIImpl->getIntrinsicCost(IID, RetTy, Arguments);
82   assert(Cost >= 0 && "TTI should not produce negative costs!");
83   return Cost;
84 }
85 
86 int TargetTransformInfo::getUserCost(const User *U) const {
87   int Cost = TTIImpl->getUserCost(U);
88   assert(Cost >= 0 && "TTI should not produce negative costs!");
89   return Cost;
90 }
91 
92 bool TargetTransformInfo::hasBranchDivergence() const {
93   return TTIImpl->hasBranchDivergence();
94 }
95 
96 bool TargetTransformInfo::isSourceOfDivergence(const Value *V) const {
97   return TTIImpl->isSourceOfDivergence(V);
98 }
99 
100 bool TargetTransformInfo::isLoweredToCall(const Function *F) const {
101   return TTIImpl->isLoweredToCall(F);
102 }
103 
104 void TargetTransformInfo::getUnrollingPreferences(
105     Loop *L, UnrollingPreferences &UP) const {
106   return TTIImpl->getUnrollingPreferences(L, UP);
107 }
108 
109 bool TargetTransformInfo::isLegalAddImmediate(int64_t Imm) const {
110   return TTIImpl->isLegalAddImmediate(Imm);
111 }
112 
113 bool TargetTransformInfo::isLegalICmpImmediate(int64_t Imm) const {
114   return TTIImpl->isLegalICmpImmediate(Imm);
115 }
116 
117 bool TargetTransformInfo::isLegalAddressingMode(Type *Ty, GlobalValue *BaseGV,
118                                                 int64_t BaseOffset,
119                                                 bool HasBaseReg,
120                                                 int64_t Scale,
121                                                 unsigned AddrSpace) const {
122   return TTIImpl->isLegalAddressingMode(Ty, BaseGV, BaseOffset, HasBaseReg,
123                                         Scale, AddrSpace);
124 }
125 
126 bool TargetTransformInfo::isLegalMaskedStore(Type *DataType) const {
127   return TTIImpl->isLegalMaskedStore(DataType);
128 }
129 
130 bool TargetTransformInfo::isLegalMaskedLoad(Type *DataType) const {
131   return TTIImpl->isLegalMaskedLoad(DataType);
132 }
133 
134 bool TargetTransformInfo::isLegalMaskedGather(Type *DataType) const {
135   return TTIImpl->isLegalMaskedGather(DataType);
136 }
137 
138 bool TargetTransformInfo::isLegalMaskedScatter(Type *DataType) const {
139   return TTIImpl->isLegalMaskedGather(DataType);
140 }
141 
142 int TargetTransformInfo::getScalingFactorCost(Type *Ty, GlobalValue *BaseGV,
143                                               int64_t BaseOffset,
144                                               bool HasBaseReg,
145                                               int64_t Scale,
146                                               unsigned AddrSpace) const {
147   int Cost = TTIImpl->getScalingFactorCost(Ty, BaseGV, BaseOffset, HasBaseReg,
148                                            Scale, AddrSpace);
149   assert(Cost >= 0 && "TTI should not produce negative costs!");
150   return Cost;
151 }
152 
153 bool TargetTransformInfo::isFoldableMemAccessOffset(Instruction *I,
154                                                     int64_t Offset) const {
155   return TTIImpl->isFoldableMemAccessOffset(I, Offset);
156 }
157 
158 bool TargetTransformInfo::isTruncateFree(Type *Ty1, Type *Ty2) const {
159   return TTIImpl->isTruncateFree(Ty1, Ty2);
160 }
161 
162 bool TargetTransformInfo::isProfitableToHoist(Instruction *I) const {
163   return TTIImpl->isProfitableToHoist(I);
164 }
165 
166 bool TargetTransformInfo::isTypeLegal(Type *Ty) const {
167   return TTIImpl->isTypeLegal(Ty);
168 }
169 
170 unsigned TargetTransformInfo::getJumpBufAlignment() const {
171   return TTIImpl->getJumpBufAlignment();
172 }
173 
174 unsigned TargetTransformInfo::getJumpBufSize() const {
175   return TTIImpl->getJumpBufSize();
176 }
177 
178 bool TargetTransformInfo::shouldBuildLookupTables() const {
179   return TTIImpl->shouldBuildLookupTables();
180 }
181 bool TargetTransformInfo::shouldBuildLookupTablesForConstant(Constant *C) const {
182   return TTIImpl->shouldBuildLookupTablesForConstant(C);
183 }
184 
185 bool TargetTransformInfo::enableAggressiveInterleaving(bool LoopHasReductions) const {
186   return TTIImpl->enableAggressiveInterleaving(LoopHasReductions);
187 }
188 
189 bool TargetTransformInfo::enableInterleavedAccessVectorization() const {
190   return TTIImpl->enableInterleavedAccessVectorization();
191 }
192 
193 bool TargetTransformInfo::isFPVectorizationPotentiallyUnsafe() const {
194   return TTIImpl->isFPVectorizationPotentiallyUnsafe();
195 }
196 
197 bool TargetTransformInfo::allowsMisalignedMemoryAccesses(LLVMContext &Context,
198                                                          unsigned BitWidth,
199                                                          unsigned AddressSpace,
200                                                          unsigned Alignment,
201                                                          bool *Fast) const {
202   return TTIImpl->allowsMisalignedMemoryAccesses(Context, BitWidth, AddressSpace,
203                                                  Alignment, Fast);
204 }
205 
206 TargetTransformInfo::PopcntSupportKind
207 TargetTransformInfo::getPopcntSupport(unsigned IntTyWidthInBit) const {
208   return TTIImpl->getPopcntSupport(IntTyWidthInBit);
209 }
210 
211 bool TargetTransformInfo::haveFastSqrt(Type *Ty) const {
212   return TTIImpl->haveFastSqrt(Ty);
213 }
214 
215 int TargetTransformInfo::getFPOpCost(Type *Ty) const {
216   int Cost = TTIImpl->getFPOpCost(Ty);
217   assert(Cost >= 0 && "TTI should not produce negative costs!");
218   return Cost;
219 }
220 
221 int TargetTransformInfo::getIntImmCodeSizeCost(unsigned Opcode, unsigned Idx,
222                                                const APInt &Imm,
223                                                Type *Ty) const {
224   int Cost = TTIImpl->getIntImmCodeSizeCost(Opcode, Idx, Imm, Ty);
225   assert(Cost >= 0 && "TTI should not produce negative costs!");
226   return Cost;
227 }
228 
229 int TargetTransformInfo::getIntImmCost(const APInt &Imm, Type *Ty) const {
230   int Cost = TTIImpl->getIntImmCost(Imm, Ty);
231   assert(Cost >= 0 && "TTI should not produce negative costs!");
232   return Cost;
233 }
234 
235 int TargetTransformInfo::getIntImmCost(unsigned Opcode, unsigned Idx,
236                                        const APInt &Imm, Type *Ty) const {
237   int Cost = TTIImpl->getIntImmCost(Opcode, Idx, Imm, Ty);
238   assert(Cost >= 0 && "TTI should not produce negative costs!");
239   return Cost;
240 }
241 
242 int TargetTransformInfo::getIntImmCost(Intrinsic::ID IID, unsigned Idx,
243                                        const APInt &Imm, Type *Ty) const {
244   int Cost = TTIImpl->getIntImmCost(IID, Idx, Imm, Ty);
245   assert(Cost >= 0 && "TTI should not produce negative costs!");
246   return Cost;
247 }
248 
249 unsigned TargetTransformInfo::getNumberOfRegisters(bool Vector) const {
250   return TTIImpl->getNumberOfRegisters(Vector);
251 }
252 
253 unsigned TargetTransformInfo::getRegisterBitWidth(bool Vector) const {
254   return TTIImpl->getRegisterBitWidth(Vector);
255 }
256 
257 unsigned TargetTransformInfo::getCacheLineSize() const {
258   return TTIImpl->getCacheLineSize();
259 }
260 
261 unsigned TargetTransformInfo::getPrefetchDistance() const {
262   return TTIImpl->getPrefetchDistance();
263 }
264 
265 unsigned TargetTransformInfo::getMinPrefetchStride() const {
266   return TTIImpl->getMinPrefetchStride();
267 }
268 
269 unsigned TargetTransformInfo::getMaxPrefetchIterationsAhead() const {
270   return TTIImpl->getMaxPrefetchIterationsAhead();
271 }
272 
273 unsigned TargetTransformInfo::getMaxInterleaveFactor(unsigned VF) const {
274   return TTIImpl->getMaxInterleaveFactor(VF);
275 }
276 
277 int TargetTransformInfo::getArithmeticInstrCost(
278     unsigned Opcode, Type *Ty, OperandValueKind Opd1Info,
279     OperandValueKind Opd2Info, OperandValueProperties Opd1PropInfo,
280     OperandValueProperties Opd2PropInfo,
281     ArrayRef<const Value *> Args) const {
282   int Cost = TTIImpl->getArithmeticInstrCost(Opcode, Ty, Opd1Info, Opd2Info,
283                                              Opd1PropInfo, Opd2PropInfo, Args);
284   assert(Cost >= 0 && "TTI should not produce negative costs!");
285   return Cost;
286 }
287 
288 int TargetTransformInfo::getShuffleCost(ShuffleKind Kind, Type *Ty, int Index,
289                                         Type *SubTp) const {
290   int Cost = TTIImpl->getShuffleCost(Kind, Ty, Index, SubTp);
291   assert(Cost >= 0 && "TTI should not produce negative costs!");
292   return Cost;
293 }
294 
295 int TargetTransformInfo::getCastInstrCost(unsigned Opcode, Type *Dst,
296                                           Type *Src) const {
297   int Cost = TTIImpl->getCastInstrCost(Opcode, Dst, Src);
298   assert(Cost >= 0 && "TTI should not produce negative costs!");
299   return Cost;
300 }
301 
302 int TargetTransformInfo::getExtractWithExtendCost(unsigned Opcode, Type *Dst,
303                                                   VectorType *VecTy,
304                                                   unsigned Index) const {
305   int Cost = TTIImpl->getExtractWithExtendCost(Opcode, Dst, VecTy, Index);
306   assert(Cost >= 0 && "TTI should not produce negative costs!");
307   return Cost;
308 }
309 
310 int TargetTransformInfo::getCFInstrCost(unsigned Opcode) const {
311   int Cost = TTIImpl->getCFInstrCost(Opcode);
312   assert(Cost >= 0 && "TTI should not produce negative costs!");
313   return Cost;
314 }
315 
316 int TargetTransformInfo::getCmpSelInstrCost(unsigned Opcode, Type *ValTy,
317                                             Type *CondTy) const {
318   int Cost = TTIImpl->getCmpSelInstrCost(Opcode, ValTy, CondTy);
319   assert(Cost >= 0 && "TTI should not produce negative costs!");
320   return Cost;
321 }
322 
323 int TargetTransformInfo::getVectorInstrCost(unsigned Opcode, Type *Val,
324                                             unsigned Index) const {
325   int Cost = TTIImpl->getVectorInstrCost(Opcode, Val, Index);
326   assert(Cost >= 0 && "TTI should not produce negative costs!");
327   return Cost;
328 }
329 
330 int TargetTransformInfo::getMemoryOpCost(unsigned Opcode, Type *Src,
331                                          unsigned Alignment,
332                                          unsigned AddressSpace) const {
333   int Cost = TTIImpl->getMemoryOpCost(Opcode, Src, Alignment, AddressSpace);
334   assert(Cost >= 0 && "TTI should not produce negative costs!");
335   return Cost;
336 }
337 
338 int TargetTransformInfo::getMaskedMemoryOpCost(unsigned Opcode, Type *Src,
339                                                unsigned Alignment,
340                                                unsigned AddressSpace) const {
341   int Cost =
342       TTIImpl->getMaskedMemoryOpCost(Opcode, Src, Alignment, AddressSpace);
343   assert(Cost >= 0 && "TTI should not produce negative costs!");
344   return Cost;
345 }
346 
347 int TargetTransformInfo::getGatherScatterOpCost(unsigned Opcode, Type *DataTy,
348                                                 Value *Ptr, bool VariableMask,
349                                                 unsigned Alignment) const {
350   int Cost = TTIImpl->getGatherScatterOpCost(Opcode, DataTy, Ptr, VariableMask,
351                                              Alignment);
352   assert(Cost >= 0 && "TTI should not produce negative costs!");
353   return Cost;
354 }
355 
356 int TargetTransformInfo::getInterleavedMemoryOpCost(
357     unsigned Opcode, Type *VecTy, unsigned Factor, ArrayRef<unsigned> Indices,
358     unsigned Alignment, unsigned AddressSpace) const {
359   int Cost = TTIImpl->getInterleavedMemoryOpCost(Opcode, VecTy, Factor, Indices,
360                                                  Alignment, AddressSpace);
361   assert(Cost >= 0 && "TTI should not produce negative costs!");
362   return Cost;
363 }
364 
365 int TargetTransformInfo::getIntrinsicInstrCost(Intrinsic::ID ID, Type *RetTy,
366                                                ArrayRef<Type *> Tys,
367                                                FastMathFlags FMF) const {
368   int Cost = TTIImpl->getIntrinsicInstrCost(ID, RetTy, Tys, FMF);
369   assert(Cost >= 0 && "TTI should not produce negative costs!");
370   return Cost;
371 }
372 
373 int TargetTransformInfo::getIntrinsicInstrCost(Intrinsic::ID ID, Type *RetTy,
374                                                ArrayRef<Value *> Args,
375                                                FastMathFlags FMF) const {
376   int Cost = TTIImpl->getIntrinsicInstrCost(ID, RetTy, Args, FMF);
377   assert(Cost >= 0 && "TTI should not produce negative costs!");
378   return Cost;
379 }
380 
381 int TargetTransformInfo::getCallInstrCost(Function *F, Type *RetTy,
382                                           ArrayRef<Type *> Tys) const {
383   int Cost = TTIImpl->getCallInstrCost(F, RetTy, Tys);
384   assert(Cost >= 0 && "TTI should not produce negative costs!");
385   return Cost;
386 }
387 
388 unsigned TargetTransformInfo::getNumberOfParts(Type *Tp) const {
389   return TTIImpl->getNumberOfParts(Tp);
390 }
391 
392 int TargetTransformInfo::getAddressComputationCost(Type *Tp,
393                                                    ScalarEvolution *SE,
394                                                    const SCEV *Ptr) const {
395   int Cost = TTIImpl->getAddressComputationCost(Tp, SE, Ptr);
396   assert(Cost >= 0 && "TTI should not produce negative costs!");
397   return Cost;
398 }
399 
400 int TargetTransformInfo::getReductionCost(unsigned Opcode, Type *Ty,
401                                           bool IsPairwiseForm) const {
402   int Cost = TTIImpl->getReductionCost(Opcode, Ty, IsPairwiseForm);
403   assert(Cost >= 0 && "TTI should not produce negative costs!");
404   return Cost;
405 }
406 
407 unsigned
408 TargetTransformInfo::getCostOfKeepingLiveOverCall(ArrayRef<Type *> Tys) const {
409   return TTIImpl->getCostOfKeepingLiveOverCall(Tys);
410 }
411 
412 bool TargetTransformInfo::getTgtMemIntrinsic(IntrinsicInst *Inst,
413                                              MemIntrinsicInfo &Info) const {
414   return TTIImpl->getTgtMemIntrinsic(Inst, Info);
415 }
416 
417 Value *TargetTransformInfo::getOrCreateResultFromMemIntrinsic(
418     IntrinsicInst *Inst, Type *ExpectedType) const {
419   return TTIImpl->getOrCreateResultFromMemIntrinsic(Inst, ExpectedType);
420 }
421 
422 bool TargetTransformInfo::areInlineCompatible(const Function *Caller,
423                                               const Function *Callee) const {
424   return TTIImpl->areInlineCompatible(Caller, Callee);
425 }
426 
427 unsigned TargetTransformInfo::getLoadStoreVecRegBitWidth(unsigned AS) const {
428   return TTIImpl->getLoadStoreVecRegBitWidth(AS);
429 }
430 
431 bool TargetTransformInfo::isLegalToVectorizeLoad(LoadInst *LI) const {
432   return TTIImpl->isLegalToVectorizeLoad(LI);
433 }
434 
435 bool TargetTransformInfo::isLegalToVectorizeStore(StoreInst *SI) const {
436   return TTIImpl->isLegalToVectorizeStore(SI);
437 }
438 
439 bool TargetTransformInfo::isLegalToVectorizeLoadChain(
440     unsigned ChainSizeInBytes, unsigned Alignment, unsigned AddrSpace) const {
441   return TTIImpl->isLegalToVectorizeLoadChain(ChainSizeInBytes, Alignment,
442                                               AddrSpace);
443 }
444 
445 bool TargetTransformInfo::isLegalToVectorizeStoreChain(
446     unsigned ChainSizeInBytes, unsigned Alignment, unsigned AddrSpace) const {
447   return TTIImpl->isLegalToVectorizeStoreChain(ChainSizeInBytes, Alignment,
448                                                AddrSpace);
449 }
450 
451 unsigned TargetTransformInfo::getLoadVectorFactor(unsigned VF,
452                                                   unsigned LoadSize,
453                                                   unsigned ChainSizeInBytes,
454                                                   VectorType *VecTy) const {
455   return TTIImpl->getLoadVectorFactor(VF, LoadSize, ChainSizeInBytes, VecTy);
456 }
457 
458 unsigned TargetTransformInfo::getStoreVectorFactor(unsigned VF,
459                                                    unsigned StoreSize,
460                                                    unsigned ChainSizeInBytes,
461                                                    VectorType *VecTy) const {
462   return TTIImpl->getStoreVectorFactor(VF, StoreSize, ChainSizeInBytes, VecTy);
463 }
464 
465 TargetTransformInfo::Concept::~Concept() {}
466 
467 TargetIRAnalysis::TargetIRAnalysis() : TTICallback(&getDefaultTTI) {}
468 
469 TargetIRAnalysis::TargetIRAnalysis(
470     std::function<Result(const Function &)> TTICallback)
471     : TTICallback(std::move(TTICallback)) {}
472 
473 TargetIRAnalysis::Result TargetIRAnalysis::run(const Function &F,
474                                                FunctionAnalysisManager &) {
475   return TTICallback(F);
476 }
477 
478 AnalysisKey TargetIRAnalysis::Key;
479 
480 TargetIRAnalysis::Result TargetIRAnalysis::getDefaultTTI(const Function &F) {
481   return Result(F.getParent()->getDataLayout());
482 }
483 
484 // Register the basic pass.
485 INITIALIZE_PASS(TargetTransformInfoWrapperPass, "tti",
486                 "Target Transform Information", false, true)
487 char TargetTransformInfoWrapperPass::ID = 0;
488 
489 void TargetTransformInfoWrapperPass::anchor() {}
490 
491 TargetTransformInfoWrapperPass::TargetTransformInfoWrapperPass()
492     : ImmutablePass(ID) {
493   initializeTargetTransformInfoWrapperPassPass(
494       *PassRegistry::getPassRegistry());
495 }
496 
497 TargetTransformInfoWrapperPass::TargetTransformInfoWrapperPass(
498     TargetIRAnalysis TIRA)
499     : ImmutablePass(ID), TIRA(std::move(TIRA)) {
500   initializeTargetTransformInfoWrapperPassPass(
501       *PassRegistry::getPassRegistry());
502 }
503 
504 TargetTransformInfo &TargetTransformInfoWrapperPass::getTTI(const Function &F) {
505   FunctionAnalysisManager DummyFAM;
506   TTI = TIRA.run(F, DummyFAM);
507   return *TTI;
508 }
509 
510 ImmutablePass *
511 llvm::createTargetTransformInfoWrapperPass(TargetIRAnalysis TIRA) {
512   return new TargetTransformInfoWrapperPass(std::move(TIRA));
513 }
514