lib/Target/X86/X86TargetTransformInfo.h

   1 //===-- X86TargetTransformInfo.h - X86 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 /// X86 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_X86_X86TARGETTRANSFORMINFO_H
  17 #define LLVM_LIB_TARGET_X86_X86TARGETTRANSFORMINFO_H
  18
  19 #include "X86.h"
  20 #include "X86TargetMachine.h"
  21 #include "llvm/Analysis/TargetTransformInfo.h"
  22 #include "llvm/CodeGen/BasicTTIImpl.h"
  23 #include "llvm/CodeGen/TargetLowering.h"
  24
  25 namespace llvm {
  26
  27 class X86TTIImpl : public BasicTTIImplBase<X86TTIImpl> {
  28   typedef BasicTTIImplBase<X86TTIImpl> BaseT;
  29   typedef TargetTransformInfo TTI;
  30   friend BaseT;
  31
  32   const X86Subtarget *ST;
  33   const X86TargetLowering *TLI;
  34
  35   const X86Subtarget *getST() const { return ST; }
  36   const X86TargetLowering *getTLI() const { return TLI; }
  37
  38 public:
  39   explicit X86TTIImpl(const X86TargetMachine *TM, const Function &F)
  40       : BaseT(TM, F.getParent()->getDataLayout()), ST(TM->getSubtargetImpl(F)),
  41         TLI(ST->getTargetLowering()) {}
  42
  43   /// \name Scalar TTI Implementations
  44   /// @{
  45   TTI::PopcntSupportKind getPopcntSupport(unsigned TyWidth);
  46
  47   /// @}
  48
  49   /// \name Cache TTI Implementation
  50   /// @{
  51   llvm::Optional<unsigned> getCacheSize(
  52     TargetTransformInfo::CacheLevel Level) const;
  53   llvm::Optional<unsigned> getCacheAssociativity(
  54     TargetTransformInfo::CacheLevel Level) const;
  55   /// @}
  56
  57   /// \name Vector TTI Implementations
  58   /// @{
  59
  60   unsigned getNumberOfRegisters(bool Vector);
  61   unsigned getRegisterBitWidth(bool Vector) const;
  62   unsigned getMinVectorRegisterBitWidth() const;
  63   unsigned getLoadStoreVecRegBitWidth(unsigned AS) const;
  64   unsigned getMaxInterleaveFactor(unsigned VF);
  65   int getArithmeticInstrCost(
  66       unsigned Opcode, Type *Ty,
  67       TTI::OperandValueKind Opd1Info = TTI::OK_AnyValue,
  68       TTI::OperandValueKind Opd2Info = TTI::OK_AnyValue,
  69       TTI::OperandValueProperties Opd1PropInfo = TTI::OP_None,
  70       TTI::OperandValueProperties Opd2PropInfo = TTI::OP_None,
  71       ArrayRef<const Value *> Args = ArrayRef<const Value *>());
  72   int getShuffleCost(TTI::ShuffleKind Kind, Type *Tp, int Index, Type *SubTp);
  73   int getCastInstrCost(unsigned Opcode, Type *Dst, Type *Src,
  74                        const Instruction *I = nullptr);
  75   int getCmpSelInstrCost(unsigned Opcode, Type *ValTy, Type *CondTy,
  76                          const Instruction *I = nullptr);
  77   int getVectorInstrCost(unsigned Opcode, Type *Val, unsigned Index);
  78   int getMemoryOpCost(unsigned Opcode, Type *Src, unsigned Alignment,
  79                       unsigned AddressSpace, const Instruction *I = nullptr);
  80   int getMaskedMemoryOpCost(unsigned Opcode, Type *Src, unsigned Alignment,
  81                             unsigned AddressSpace);
  82   int getGatherScatterOpCost(unsigned Opcode, Type *DataTy, Value *Ptr,
  83                              bool VariableMask, unsigned Alignment);
  84   int getAddressComputationCost(Type *PtrTy, ScalarEvolution *SE,
  85                                 const SCEV *Ptr);
  86
  87   unsigned getAtomicMemIntrinsicMaxElementSize() const;
  88
  89   int getIntrinsicInstrCost(Intrinsic::ID IID, Type *RetTy,
  90                             ArrayRef<Type *> Tys, FastMathFlags FMF,
  91                             unsigned ScalarizationCostPassed = UINT_MAX);
  92   int getIntrinsicInstrCost(Intrinsic::ID IID, Type *RetTy,
  93                             ArrayRef<Value *> Args, FastMathFlags FMF,
  94                             unsigned VF = 1);
  95
  96   int getArithmeticReductionCost(unsigned Opcode, Type *Ty,
  97                                  bool IsPairwiseForm);
  98
  99   int getMinMaxReductionCost(Type *Ty, Type *CondTy, bool IsPairwiseForm,
 100                              bool IsUnsigned);
 101
 102   int getInterleavedMemoryOpCost(unsigned Opcode, Type *VecTy,
 103                                  unsigned Factor, ArrayRef<unsigned> Indices,
 104                                  unsigned Alignment, unsigned AddressSpace,
 105                                  bool UseMaskForCond = false,
 106                                  bool UseMaskForGaps = false);
 107   int getInterleavedMemoryOpCostAVX512(unsigned Opcode, Type *VecTy,
 108                                  unsigned Factor, ArrayRef<unsigned> Indices,
 109                                  unsigned Alignment, unsigned AddressSpace,
 110                                  bool UseMaskForCond = false,
 111                                  bool UseMaskForGaps = false);
 112   int getInterleavedMemoryOpCostAVX2(unsigned Opcode, Type *VecTy,
 113                                  unsigned Factor, ArrayRef<unsigned> Indices,
 114                                  unsigned Alignment, unsigned AddressSpace,
 115                                  bool UseMaskForCond = false,
 116                                  bool UseMaskForGaps = false);
 117
 118   int getIntImmCost(int64_t);
 119
 120   int getIntImmCost(const APInt &Imm, Type *Ty);
 121
 122   unsigned getUserCost(const User *U, ArrayRef<const Value *> Operands);
 123
 124   int getIntImmCost(unsigned Opcode, unsigned Idx, const APInt &Imm, Type *Ty);
 125   int getIntImmCost(Intrinsic::ID IID, unsigned Idx, const APInt &Imm,
 126                     Type *Ty);
 127   bool isLSRCostLess(TargetTransformInfo::LSRCost &C1,
 128                      TargetTransformInfo::LSRCost &C2);
 129   bool canMacroFuseCmp();
 130   bool isLegalMaskedLoad(Type *DataType);
 131   bool isLegalMaskedStore(Type *DataType);
 132   bool isLegalMaskedGather(Type *DataType);
 133   bool isLegalMaskedScatter(Type *DataType);
 134   bool hasDivRemOp(Type *DataType, bool IsSigned);
 135   bool isFCmpOrdCheaperThanFCmpZero(Type *Ty);
 136   bool areInlineCompatible(const Function *Caller,
 137                            const Function *Callee) const;
 138   const TTI::MemCmpExpansionOptions *enableMemCmpExpansion(
 139       bool IsZeroCmp) const;
 140   bool enableInterleavedAccessVectorization();
 141 private:
 142   int getGSScalarCost(unsigned Opcode, Type *DataTy, bool VariableMask,
 143                       unsigned Alignment, unsigned AddressSpace);
 144   int getGSVectorCost(unsigned Opcode, Type *DataTy, Value *Ptr,
 145                       unsigned Alignment, unsigned AddressSpace);
 146
 147   /// @}
 148 };
 149
 150 } // end namespace llvm
 151
 152 #endif