1 //===-- AArch64TargetTransformInfo.h - AArch64 specific TTI -----*- C++ -*-===// 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 /// \file 10 /// This file a TargetTransformInfo::Concept conforming object specific to the 11 /// AArch64 target machine. It uses the target's detailed information to 12 /// provide more precise answers to certain TTI queries, while letting the 13 /// target independent and default TTI implementations handle the rest. 14 /// 15 //===----------------------------------------------------------------------===// 16 17 #ifndef LLVM_LIB_TARGET_AARCH64_AARCH64TARGETTRANSFORMINFO_H 18 #define LLVM_LIB_TARGET_AARCH64_AARCH64TARGETTRANSFORMINFO_H 19 20 #include "AArch64.h" 21 #include "AArch64TargetMachine.h" 22 #include "llvm/Analysis/TargetTransformInfo.h" 23 #include "llvm/CodeGen/BasicTTIImpl.h" 24 #include "llvm/Target/TargetLowering.h" 25 #include <algorithm> 26 27 namespace llvm { 28 29 class AArch64TTIImpl : public BasicTTIImplBase<AArch64TTIImpl> { 30 typedef BasicTTIImplBase<AArch64TTIImpl> BaseT; 31 typedef TargetTransformInfo TTI; 32 friend BaseT; 33 34 const AArch64Subtarget *ST; 35 const AArch64TargetLowering *TLI; 36 37 /// Estimate the overhead of scalarizing an instruction. Insert and Extract 38 /// are set if the result needs to be inserted and/or extracted from vectors. 39 unsigned getScalarizationOverhead(Type *Ty, bool Insert, bool Extract); 40 41 const AArch64Subtarget *getST() const { return ST; } 42 const AArch64TargetLowering *getTLI() const { return TLI; } 43 44 enum MemIntrinsicType { 45 VECTOR_LDST_TWO_ELEMENTS, 46 VECTOR_LDST_THREE_ELEMENTS, 47 VECTOR_LDST_FOUR_ELEMENTS 48 }; 49 50 public: 51 explicit AArch64TTIImpl(const AArch64TargetMachine *TM, const Function &F) 52 : BaseT(TM, F.getParent()->getDataLayout()), ST(TM->getSubtargetImpl(F)), 53 TLI(ST->getTargetLowering()) {} 54 55 // Provide value semantics. MSVC requires that we spell all of these out. 56 AArch64TTIImpl(const AArch64TTIImpl &Arg) 57 : BaseT(static_cast<const BaseT &>(Arg)), ST(Arg.ST), TLI(Arg.TLI) {} 58 AArch64TTIImpl(AArch64TTIImpl &&Arg) 59 : BaseT(std::move(static_cast<BaseT &>(Arg))), ST(std::move(Arg.ST)), 60 TLI(std::move(Arg.TLI)) {} 61 62 /// \name Scalar TTI Implementations 63 /// @{ 64 65 using BaseT::getIntImmCost; 66 int getIntImmCost(int64_t Val); 67 int getIntImmCost(const APInt &Imm, Type *Ty); 68 int getIntImmCost(unsigned Opcode, unsigned Idx, const APInt &Imm, Type *Ty); 69 int getIntImmCost(Intrinsic::ID IID, unsigned Idx, const APInt &Imm, 70 Type *Ty); 71 TTI::PopcntSupportKind getPopcntSupport(unsigned TyWidth); 72 73 /// @} 74 75 /// \name Vector TTI Implementations 76 /// @{ 77 78 bool enableInterleavedAccessVectorization() { return true; } 79 80 unsigned getNumberOfRegisters(bool Vector) { 81 if (Vector) { 82 if (ST->hasNEON()) 83 return 32; 84 return 0; 85 } 86 return 31; 87 } 88 89 unsigned getRegisterBitWidth(bool Vector) { 90 if (Vector) { 91 if (ST->hasNEON()) 92 return 128; 93 return 0; 94 } 95 return 64; 96 } 97 98 unsigned getMaxInterleaveFactor(unsigned VF); 99 100 int getCastInstrCost(unsigned Opcode, Type *Dst, Type *Src); 101 102 int getExtractWithExtendCost(unsigned Opcode, Type *Dst, VectorType *VecTy, 103 unsigned Index); 104 105 int getVectorInstrCost(unsigned Opcode, Type *Val, unsigned Index); 106 107 int getArithmeticInstrCost( 108 unsigned Opcode, Type *Ty, 109 TTI::OperandValueKind Opd1Info = TTI::OK_AnyValue, 110 TTI::OperandValueKind Opd2Info = TTI::OK_AnyValue, 111 TTI::OperandValueProperties Opd1PropInfo = TTI::OP_None, 112 TTI::OperandValueProperties Opd2PropInfo = TTI::OP_None); 113 114 int getAddressComputationCost(Type *Ty, bool IsComplex); 115 116 int getCmpSelInstrCost(unsigned Opcode, Type *ValTy, Type *CondTy); 117 118 int getMemoryOpCost(unsigned Opcode, Type *Src, unsigned Alignment, 119 unsigned AddressSpace); 120 121 int getCostOfKeepingLiveOverCall(ArrayRef<Type *> Tys); 122 123 void getUnrollingPreferences(Loop *L, TTI::UnrollingPreferences &UP); 124 125 Value *getOrCreateResultFromMemIntrinsic(IntrinsicInst *Inst, 126 Type *ExpectedType); 127 128 bool getTgtMemIntrinsic(IntrinsicInst *Inst, MemIntrinsicInfo &Info); 129 130 int getInterleavedMemoryOpCost(unsigned Opcode, Type *VecTy, unsigned Factor, 131 ArrayRef<unsigned> Indices, unsigned Alignment, 132 unsigned AddressSpace); 133 134 unsigned getCacheLineSize(); 135 136 unsigned getPrefetchDistance(); 137 138 unsigned getMinPrefetchStride(); 139 140 unsigned getMaxPrefetchIterationsAhead(); 141 /// @} 142 }; 143 144 } // end namespace llvm 145 146 #endif 147