1 //===-- PPCTargetTransformInfo.h - PPC specific TTI -------------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 /// \file 9 /// This file a TargetTransformInfo::Concept conforming object specific to the 10 /// PPC target machine. It uses the target's detailed information to 11 /// provide more precise answers to certain TTI queries, while letting the 12 /// target independent and default TTI implementations handle the rest. 13 /// 14 //===----------------------------------------------------------------------===// 15 16 #ifndef LLVM_LIB_TARGET_POWERPC_PPCTARGETTRANSFORMINFO_H 17 #define LLVM_LIB_TARGET_POWERPC_PPCTARGETTRANSFORMINFO_H 18 19 #include "PPCTargetMachine.h" 20 #include "llvm/Analysis/TargetTransformInfo.h" 21 #include "llvm/CodeGen/BasicTTIImpl.h" 22 #include "llvm/CodeGen/TargetLowering.h" 23 #include <optional> 24 25 namespace llvm { 26 27 class PPCTTIImpl : public BasicTTIImplBase<PPCTTIImpl> { 28 typedef BasicTTIImplBase<PPCTTIImpl> BaseT; 29 typedef TargetTransformInfo TTI; 30 friend BaseT; 31 32 const PPCSubtarget *ST; 33 const PPCTargetLowering *TLI; 34 35 const PPCSubtarget *getST() const { return ST; } 36 const PPCTargetLowering *getTLI() const { return TLI; } 37 38 public: 39 explicit PPCTTIImpl(const PPCTargetMachine *TM, const Function &F) 40 : BaseT(TM, F.getParent()->getDataLayout()), ST(TM->getSubtargetImpl(F)), 41 TLI(ST->getTargetLowering()) {} 42 43 std::optional<Instruction *> instCombineIntrinsic(InstCombiner & IC, 44 IntrinsicInst & II) const; 45 46 /// \name Scalar TTI Implementations 47 /// @{ 48 49 using BaseT::getIntImmCost; 50 InstructionCost getIntImmCost(const APInt &Imm, Type *Ty, 51 TTI::TargetCostKind CostKind); 52 53 InstructionCost getIntImmCostInst(unsigned Opcode, unsigned Idx, 54 const APInt &Imm, Type *Ty, 55 TTI::TargetCostKind CostKind, 56 Instruction *Inst = nullptr); 57 InstructionCost getIntImmCostIntrin(Intrinsic::ID IID, unsigned Idx, 58 const APInt &Imm, Type *Ty, 59 TTI::TargetCostKind CostKind); 60 61 InstructionCost getInstructionCost(const User *U, 62 ArrayRef<const Value *> Operands, 63 TTI::TargetCostKind CostKind); 64 65 TTI::PopcntSupportKind getPopcntSupport(unsigned TyWidth); 66 bool isHardwareLoopProfitable(Loop *L, ScalarEvolution &SE, 67 AssumptionCache &AC, 68 TargetLibraryInfo *LibInfo, 69 HardwareLoopInfo &HWLoopInfo); 70 bool canSaveCmp(Loop *L, BranchInst **BI, ScalarEvolution *SE, LoopInfo *LI, 71 DominatorTree *DT, AssumptionCache *AC, 72 TargetLibraryInfo *LibInfo); 73 bool getTgtMemIntrinsic(IntrinsicInst *Inst, MemIntrinsicInfo &Info); 74 void getUnrollingPreferences(Loop *L, ScalarEvolution &SE, 75 TTI::UnrollingPreferences &UP, 76 OptimizationRemarkEmitter *ORE); 77 void getPeelingPreferences(Loop *L, ScalarEvolution &SE, 78 TTI::PeelingPreferences &PP); 79 bool isLSRCostLess(const TargetTransformInfo::LSRCost &C1, 80 const TargetTransformInfo::LSRCost &C2); 81 bool isNumRegsMajorCostOfLSR(); 82 bool shouldBuildRelLookupTables() const; 83 /// @} 84 85 /// \name Vector TTI Implementations 86 /// @{ 87 bool useColdCCForColdCall(Function &F); 88 bool enableAggressiveInterleaving(bool LoopHasReductions); 89 TTI::MemCmpExpansionOptions enableMemCmpExpansion(bool OptSize, 90 bool IsZeroCmp) const; 91 bool enableInterleavedAccessVectorization(); 92 93 enum PPCRegisterClass { 94 GPRRC, FPRRC, VRRC, VSXRC 95 }; 96 unsigned getNumberOfRegisters(unsigned ClassID) const; 97 unsigned getRegisterClassForType(bool Vector, Type *Ty = nullptr) const; 98 const char* getRegisterClassName(unsigned ClassID) const; 99 TypeSize getRegisterBitWidth(TargetTransformInfo::RegisterKind K) const; 100 unsigned getCacheLineSize() const override; 101 unsigned getPrefetchDistance() const override; 102 unsigned getMaxInterleaveFactor(ElementCount VF); 103 InstructionCost vectorCostAdjustmentFactor(unsigned Opcode, Type *Ty1, 104 Type *Ty2); 105 InstructionCost getArithmeticInstrCost( 106 unsigned Opcode, Type *Ty, TTI::TargetCostKind CostKind, 107 TTI::OperandValueInfo Op1Info = {TTI::OK_AnyValue, TTI::OP_None}, 108 TTI::OperandValueInfo Op2Info = {TTI::OK_AnyValue, TTI::OP_None}, 109 ArrayRef<const Value *> Args = ArrayRef<const Value *>(), 110 const Instruction *CxtI = nullptr); 111 InstructionCost getShuffleCost(TTI::ShuffleKind Kind, Type *Tp, 112 ArrayRef<int> Mask, 113 TTI::TargetCostKind CostKind, int Index, 114 Type *SubTp, 115 ArrayRef<const Value *> Args = std::nullopt); 116 InstructionCost getCastInstrCost(unsigned Opcode, Type *Dst, Type *Src, 117 TTI::CastContextHint CCH, 118 TTI::TargetCostKind CostKind, 119 const Instruction *I = nullptr); 120 InstructionCost getCFInstrCost(unsigned Opcode, TTI::TargetCostKind CostKind, 121 const Instruction *I = nullptr); 122 InstructionCost getCmpSelInstrCost(unsigned Opcode, Type *ValTy, Type *CondTy, 123 CmpInst::Predicate VecPred, 124 TTI::TargetCostKind CostKind, 125 const Instruction *I = nullptr); 126 using BaseT::getVectorInstrCost; 127 InstructionCost getVectorInstrCost(unsigned Opcode, Type *Val, 128 TTI::TargetCostKind CostKind, 129 unsigned Index, Value *Op0, Value *Op1); 130 InstructionCost 131 getMemoryOpCost(unsigned Opcode, Type *Src, MaybeAlign Alignment, 132 unsigned AddressSpace, TTI::TargetCostKind CostKind, 133 TTI::OperandValueInfo OpInfo = {TTI::OK_AnyValue, TTI::OP_None}, 134 const Instruction *I = nullptr); 135 InstructionCost getInterleavedMemoryOpCost( 136 unsigned Opcode, Type *VecTy, unsigned Factor, ArrayRef<unsigned> Indices, 137 Align Alignment, unsigned AddressSpace, TTI::TargetCostKind CostKind, 138 bool UseMaskForCond = false, bool UseMaskForGaps = false); 139 InstructionCost getIntrinsicInstrCost(const IntrinsicCostAttributes &ICA, 140 TTI::TargetCostKind CostKind); 141 bool areTypesABICompatible(const Function *Caller, const Function *Callee, 142 const ArrayRef<Type *> &Types) const; 143 bool hasActiveVectorLength(unsigned Opcode, Type *DataType, 144 Align Alignment) const; 145 InstructionCost getVPMemoryOpCost(unsigned Opcode, Type *Src, Align Alignment, 146 unsigned AddressSpace, 147 TTI::TargetCostKind CostKind, 148 const Instruction *I = nullptr); 149 bool supportsTailCallFor(const CallBase *CB) const; 150 151 private: 152 // The following constant is used for estimating costs on power9. 153 static const InstructionCost::CostType P9PipelineFlushEstimate = 80; 154 155 /// @} 156 }; 157 158 } // end namespace llvm 159 160 #endif 161