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      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 
     21 using namespace llvm;
     22 
     23 #define DEBUG_TYPE "tti"
     24 
     25 namespace {
     26 /// \brief No-op implementation of the TTI interface using the utility base
     27 /// classes.
     28 ///
     29 /// This is used when no target specific information is available.
     30 struct NoTTIImpl : TargetTransformInfoImplCRTPBase<NoTTIImpl> {
     31   explicit NoTTIImpl(const DataLayout *DL)
     32       : TargetTransformInfoImplCRTPBase<NoTTIImpl>(DL) {}
     33 };
     34 }
     35 
     36 TargetTransformInfo::TargetTransformInfo(const DataLayout *DL)
     37     : TTIImpl(new Model<NoTTIImpl>(NoTTIImpl(DL))) {}
     38 
     39 TargetTransformInfo::~TargetTransformInfo() {}
     40 
     41 TargetTransformInfo::TargetTransformInfo(TargetTransformInfo &&Arg)
     42     : TTIImpl(std::move(Arg.TTIImpl)) {}
     43 
     44 TargetTransformInfo &TargetTransformInfo::operator=(TargetTransformInfo &&RHS) {
     45   TTIImpl = std::move(RHS.TTIImpl);
     46   return *this;
     47 }
     48 
     49 unsigned TargetTransformInfo::getOperationCost(unsigned Opcode, Type *Ty,
     50                                                Type *OpTy) const {
     51   return TTIImpl->getOperationCost(Opcode, Ty, OpTy);
     52 }
     53 
     54 unsigned TargetTransformInfo::getCallCost(FunctionType *FTy,
     55                                           int NumArgs) const {
     56   return TTIImpl->getCallCost(FTy, NumArgs);
     57 }
     58 
     59 unsigned
     60 TargetTransformInfo::getCallCost(const Function *F,
     61                                  ArrayRef<const Value *> Arguments) const {
     62   return TTIImpl->getCallCost(F, Arguments);
     63 }
     64 
     65 unsigned
     66 TargetTransformInfo::getIntrinsicCost(Intrinsic::ID IID, Type *RetTy,
     67                                       ArrayRef<const Value *> Arguments) const {
     68   return TTIImpl->getIntrinsicCost(IID, RetTy, Arguments);
     69 }
     70 
     71 unsigned TargetTransformInfo::getUserCost(const User *U) const {
     72   return TTIImpl->getUserCost(U);
     73 }
     74 
     75 bool TargetTransformInfo::hasBranchDivergence() const {
     76   return TTIImpl->hasBranchDivergence();
     77 }
     78 
     79 bool TargetTransformInfo::isSourceOfDivergence(const Value *V) const {
     80   return TTIImpl->isSourceOfDivergence(V);
     81 }
     82 
     83 bool TargetTransformInfo::isLoweredToCall(const Function *F) const {
     84   return TTIImpl->isLoweredToCall(F);
     85 }
     86 
     87 void TargetTransformInfo::getUnrollingPreferences(
     88     Loop *L, UnrollingPreferences &UP) const {
     89   return TTIImpl->getUnrollingPreferences(L, UP);
     90 }
     91 
     92 bool TargetTransformInfo::isLegalAddImmediate(int64_t Imm) const {
     93   return TTIImpl->isLegalAddImmediate(Imm);
     94 }
     95 
     96 bool TargetTransformInfo::isLegalICmpImmediate(int64_t Imm) const {
     97   return TTIImpl->isLegalICmpImmediate(Imm);
     98 }
     99 
    100 bool TargetTransformInfo::isLegalAddressingMode(Type *Ty, GlobalValue *BaseGV,
    101                                                 int64_t BaseOffset,
    102                                                 bool HasBaseReg,
    103                                                 int64_t Scale) const {
    104   return TTIImpl->isLegalAddressingMode(Ty, BaseGV, BaseOffset, HasBaseReg,
    105                                         Scale);
    106 }
    107 
    108 bool TargetTransformInfo::isLegalMaskedStore(Type *DataType,
    109                                              int Consecutive) const {
    110   return TTIImpl->isLegalMaskedStore(DataType, Consecutive);
    111 }
    112 
    113 bool TargetTransformInfo::isLegalMaskedLoad(Type *DataType,
    114                                             int Consecutive) const {
    115   return TTIImpl->isLegalMaskedLoad(DataType, Consecutive);
    116 }
    117 
    118 int TargetTransformInfo::getScalingFactorCost(Type *Ty, GlobalValue *BaseGV,
    119                                               int64_t BaseOffset,
    120                                               bool HasBaseReg,
    121                                               int64_t Scale) const {
    122   return TTIImpl->getScalingFactorCost(Ty, BaseGV, BaseOffset, HasBaseReg,
    123                                        Scale);
    124 }
    125 
    126 bool TargetTransformInfo::isTruncateFree(Type *Ty1, Type *Ty2) const {
    127   return TTIImpl->isTruncateFree(Ty1, Ty2);
    128 }
    129 
    130 bool TargetTransformInfo::isProfitableToHoist(Instruction *I) const {
    131   return TTIImpl->isProfitableToHoist(I);
    132 }
    133 
    134 bool TargetTransformInfo::isTypeLegal(Type *Ty) const {
    135   return TTIImpl->isTypeLegal(Ty);
    136 }
    137 
    138 unsigned TargetTransformInfo::getJumpBufAlignment() const {
    139   return TTIImpl->getJumpBufAlignment();
    140 }
    141 
    142 unsigned TargetTransformInfo::getJumpBufSize() const {
    143   return TTIImpl->getJumpBufSize();
    144 }
    145 
    146 bool TargetTransformInfo::shouldBuildLookupTables() const {
    147   return TTIImpl->shouldBuildLookupTables();
    148 }
    149 
    150 bool TargetTransformInfo::enableAggressiveInterleaving(bool LoopHasReductions) const {
    151   return TTIImpl->enableAggressiveInterleaving(LoopHasReductions);
    152 }
    153 
    154 TargetTransformInfo::PopcntSupportKind
    155 TargetTransformInfo::getPopcntSupport(unsigned IntTyWidthInBit) const {
    156   return TTIImpl->getPopcntSupport(IntTyWidthInBit);
    157 }
    158 
    159 bool TargetTransformInfo::haveFastSqrt(Type *Ty) const {
    160   return TTIImpl->haveFastSqrt(Ty);
    161 }
    162 
    163 unsigned TargetTransformInfo::getFPOpCost(Type *Ty) const {
    164   return TTIImpl->getFPOpCost(Ty);
    165 }
    166 
    167 unsigned TargetTransformInfo::getIntImmCost(const APInt &Imm, Type *Ty) const {
    168   return TTIImpl->getIntImmCost(Imm, Ty);
    169 }
    170 
    171 unsigned TargetTransformInfo::getIntImmCost(unsigned Opcode, unsigned Idx,
    172                                             const APInt &Imm, Type *Ty) const {
    173   return TTIImpl->getIntImmCost(Opcode, Idx, Imm, Ty);
    174 }
    175 
    176 unsigned TargetTransformInfo::getIntImmCost(Intrinsic::ID IID, unsigned Idx,
    177                                             const APInt &Imm, Type *Ty) const {
    178   return TTIImpl->getIntImmCost(IID, Idx, Imm, Ty);
    179 }
    180 
    181 unsigned TargetTransformInfo::getNumberOfRegisters(bool Vector) const {
    182   return TTIImpl->getNumberOfRegisters(Vector);
    183 }
    184 
    185 unsigned TargetTransformInfo::getRegisterBitWidth(bool Vector) const {
    186   return TTIImpl->getRegisterBitWidth(Vector);
    187 }
    188 
    189 unsigned TargetTransformInfo::getMaxInterleaveFactor() const {
    190   return TTIImpl->getMaxInterleaveFactor();
    191 }
    192 
    193 unsigned TargetTransformInfo::getArithmeticInstrCost(
    194     unsigned Opcode, Type *Ty, OperandValueKind Opd1Info,
    195     OperandValueKind Opd2Info, OperandValueProperties Opd1PropInfo,
    196     OperandValueProperties Opd2PropInfo) const {
    197   return TTIImpl->getArithmeticInstrCost(Opcode, Ty, Opd1Info, Opd2Info,
    198                                          Opd1PropInfo, Opd2PropInfo);
    199 }
    200 
    201 unsigned TargetTransformInfo::getShuffleCost(ShuffleKind Kind, Type *Ty,
    202                                              int Index, Type *SubTp) const {
    203   return TTIImpl->getShuffleCost(Kind, Ty, Index, SubTp);
    204 }
    205 
    206 unsigned TargetTransformInfo::getCastInstrCost(unsigned Opcode, Type *Dst,
    207                                                Type *Src) const {
    208   return TTIImpl->getCastInstrCost(Opcode, Dst, Src);
    209 }
    210 
    211 unsigned TargetTransformInfo::getCFInstrCost(unsigned Opcode) const {
    212   return TTIImpl->getCFInstrCost(Opcode);
    213 }
    214 
    215 unsigned TargetTransformInfo::getCmpSelInstrCost(unsigned Opcode, Type *ValTy,
    216                                                  Type *CondTy) const {
    217   return TTIImpl->getCmpSelInstrCost(Opcode, ValTy, CondTy);
    218 }
    219 
    220 unsigned TargetTransformInfo::getVectorInstrCost(unsigned Opcode, Type *Val,
    221                                                  unsigned Index) const {
    222   return TTIImpl->getVectorInstrCost(Opcode, Val, Index);
    223 }
    224 
    225 unsigned TargetTransformInfo::getMemoryOpCost(unsigned Opcode, Type *Src,
    226                                               unsigned Alignment,
    227                                               unsigned AddressSpace) const {
    228   return TTIImpl->getMemoryOpCost(Opcode, Src, Alignment, AddressSpace);
    229 }
    230 
    231 unsigned
    232 TargetTransformInfo::getMaskedMemoryOpCost(unsigned Opcode, Type *Src,
    233                                            unsigned Alignment,
    234                                            unsigned AddressSpace) const {
    235   return TTIImpl->getMaskedMemoryOpCost(Opcode, Src, Alignment, AddressSpace);
    236 }
    237 
    238 unsigned
    239 TargetTransformInfo::getIntrinsicInstrCost(Intrinsic::ID ID, Type *RetTy,
    240                                            ArrayRef<Type *> Tys) const {
    241   return TTIImpl->getIntrinsicInstrCost(ID, RetTy, Tys);
    242 }
    243 
    244 unsigned TargetTransformInfo::getCallInstrCost(Function *F, Type *RetTy,
    245                                                ArrayRef<Type *> Tys) const {
    246   return TTIImpl->getCallInstrCost(F, RetTy, Tys);
    247 }
    248 
    249 unsigned TargetTransformInfo::getNumberOfParts(Type *Tp) const {
    250   return TTIImpl->getNumberOfParts(Tp);
    251 }
    252 
    253 unsigned TargetTransformInfo::getAddressComputationCost(Type *Tp,
    254                                                         bool IsComplex) const {
    255   return TTIImpl->getAddressComputationCost(Tp, IsComplex);
    256 }
    257 
    258 unsigned TargetTransformInfo::getReductionCost(unsigned Opcode, Type *Ty,
    259                                                bool IsPairwiseForm) const {
    260   return TTIImpl->getReductionCost(Opcode, Ty, IsPairwiseForm);
    261 }
    262 
    263 unsigned
    264 TargetTransformInfo::getCostOfKeepingLiveOverCall(ArrayRef<Type *> Tys) const {
    265   return TTIImpl->getCostOfKeepingLiveOverCall(Tys);
    266 }
    267 
    268 bool TargetTransformInfo::getTgtMemIntrinsic(IntrinsicInst *Inst,
    269                                              MemIntrinsicInfo &Info) const {
    270   return TTIImpl->getTgtMemIntrinsic(Inst, Info);
    271 }
    272 
    273 Value *TargetTransformInfo::getOrCreateResultFromMemIntrinsic(
    274     IntrinsicInst *Inst, Type *ExpectedType) const {
    275   return TTIImpl->getOrCreateResultFromMemIntrinsic(Inst, ExpectedType);
    276 }
    277 
    278 TargetTransformInfo::Concept::~Concept() {}
    279 
    280 TargetIRAnalysis::TargetIRAnalysis() : TTICallback(&getDefaultTTI) {}
    281 
    282 TargetIRAnalysis::TargetIRAnalysis(
    283     std::function<Result(Function &)> TTICallback)
    284     : TTICallback(TTICallback) {}
    285 
    286 TargetIRAnalysis::Result TargetIRAnalysis::run(Function &F) {
    287   return TTICallback(F);
    288 }
    289 
    290 char TargetIRAnalysis::PassID;
    291 
    292 TargetIRAnalysis::Result TargetIRAnalysis::getDefaultTTI(Function &F) {
    293   return Result(&F.getParent()->getDataLayout());
    294 }
    295 
    296 // Register the basic pass.
    297 INITIALIZE_PASS(TargetTransformInfoWrapperPass, "tti",
    298                 "Target Transform Information", false, true)
    299 char TargetTransformInfoWrapperPass::ID = 0;
    300 
    301 void TargetTransformInfoWrapperPass::anchor() {}
    302 
    303 TargetTransformInfoWrapperPass::TargetTransformInfoWrapperPass()
    304     : ImmutablePass(ID) {
    305   initializeTargetTransformInfoWrapperPassPass(
    306       *PassRegistry::getPassRegistry());
    307 }
    308 
    309 TargetTransformInfoWrapperPass::TargetTransformInfoWrapperPass(
    310     TargetIRAnalysis TIRA)
    311     : ImmutablePass(ID), TIRA(std::move(TIRA)) {
    312   initializeTargetTransformInfoWrapperPassPass(
    313       *PassRegistry::getPassRegistry());
    314 }
    315 
    316 TargetTransformInfo &TargetTransformInfoWrapperPass::getTTI(Function &F) {
    317   TTI = TIRA.run(F);
    318   return *TTI;
    319 }
    320 
    321 ImmutablePass *
    322 llvm::createTargetTransformInfoWrapperPass(TargetIRAnalysis TIRA) {
    323   return new TargetTransformInfoWrapperPass(std::move(TIRA));
    324 }
    325