[Target][CodeGen] Remove default CostKind arguments on inner/impl TTI overrides

[RKSimon]

Summary

Based off a discussion on D110100, we should be avoiding default CostKinds whenever possible.

This initial patch removes them from the 'inner' target implementation callbacks - these should only be used by the main TTI calls, so this should guarantee that we don't cause changes in CostKind by missing it in an inner call. This exposed a few missing arguments in getGEPCost and reduction cost calls that I've cleaned up.

[fhahn]

LGTM, thanks! Looks like this has been already highlighted a use case where CostKind has not been passed through correctly.

[samparker]

cheers!

[dfukalov]

Thanks!

llvm/include/llvm/Analysis/TargetTransformInfo.h

public:
 
   const DataLayout &getDataLayout() const override {
     return Impl.getDataLayout();
   }
 
   InstructionCost
   getGEPCost(Type *PointeeType, const Value *Ptr,
              ArrayRef<const Value *> Operands,
-             enum TargetTransformInfo::TargetCostKind CostKind) override {
-    return Impl.getGEPCost(PointeeType, Ptr, Operands);
+             TargetTransformInfo::TargetCostKind CostKind) override {
+    return Impl.getGEPCost(PointeeType, Ptr, Operands, CostKind);
   }
   unsigned getInliningThresholdMultiplier() override {
     return Impl.getInliningThresholdMultiplier();
   }
   unsigned adjustInliningThreshold(const CallBase *CB) override {
     return Impl.adjustInliningThreshold(CB);
   }
   int getInlinerVectorBonusPercent() override {

llvm/include/llvm/Analysis/TargetTransformInfoImpl.h

 public:
   // Provide value semantics. MSVC requires that we spell all of these out.
   TargetTransformInfoImplBase(const TargetTransformInfoImplBase &Arg)
       : DL(Arg.DL) {}
   TargetTransformInfoImplBase(TargetTransformInfoImplBase &&Arg) : DL(Arg.DL) {}
 
   const DataLayout &getDataLayout() const { return DL; }
 
-  InstructionCost
-  getGEPCost(Type *PointeeType, const Value *Ptr,
+  InstructionCost getGEPCost(Type *PointeeType, const Value *Ptr,
                              ArrayRef<const Value *> Operands,
-             TTI::TargetCostKind CostKind = TTI::TCK_SizeAndLatency) const {
+                             TTI::TargetCostKind CostKind) const {
     // In the basic model, we just assume that all-constant GEPs will be folded
     // into their uses via addressing modes.
     for (unsigned Idx = 0, Size = Operands.size(); Idx != Size; ++Idx)
       if (!isa<Constant>(Operands[Idx]))
         return TTI::TCC_Basic;
 
     return TTI::TCC_Free;
   }
InstructionCost getArithmeticReductionCost(unsigned, VectorType *,
     return 1;
   }
 
   InstructionCost getMinMaxReductionCost(VectorType *, VectorType *, bool,
                                          TTI::TargetCostKind) const {
     return 1;
   }
 
-  InstructionCost getExtendedAddReductionCost(
-      bool IsMLA, bool IsUnsigned, Type *ResTy, VectorType *Ty,
-      TTI::TargetCostKind CostKind = TTI::TCK_RecipThroughput) const {
+  InstructionCost
+  getExtendedAddReductionCost(bool IsMLA, bool IsUnsigned, Type *ResTy,
+                              VectorType *Ty,
+                              TTI::TargetCostKind CostKind) const {
     return 1;
   }
 
   InstructionCost getCostOfKeepingLiveOverCall(ArrayRef<Type *> Tys) const {
     return 0;
   }
 
   bool getTgtMemIntrinsic(IntrinsicInst *Inst, MemIntrinsicInfo &Info) const {
private:
   typedef TargetTransformInfoImplBase BaseT;
 
 protected:
   explicit TargetTransformInfoImplCRTPBase(const DataLayout &DL) : BaseT(DL) {}
 
 public:
   using BaseT::getGEPCost;
 
-  InstructionCost
-  getGEPCost(Type *PointeeType, const Value *Ptr,
+  InstructionCost getGEPCost(Type *PointeeType, const Value *Ptr,
                              ArrayRef<const Value *> Operands,
-             TTI::TargetCostKind CostKind = TTI::TCK_SizeAndLatency) {
+                             TTI::TargetCostKind CostKind) {
     assert(PointeeType && Ptr && "can't get GEPCost of nullptr");
     assert(cast<PointerType>(Ptr->getType()->getScalarType())
                ->isOpaqueOrPointeeTypeMatches(PointeeType) &&
            "explicit pointee type doesn't match operand's pointee type");
     auto *BaseGV = dyn_cast<GlobalValue>(Ptr->stripPointerCasts());
     bool HasBaseReg = (BaseGV == nullptr);
 
     auto PtrSizeBits = DL.getPointerTypeSizeInBits(Ptr->getType());
InstructionCost getUserCost(const User *U, ArrayRef<const Value *> Operands,
     case Instruction::ExtractValue:
     case Instruction::Freeze:
       return TTI::TCC_Free;
     case Instruction::Alloca:
       if (cast<AllocaInst>(U)->isStaticAlloca())
         return TTI::TCC_Free;
       break;
     case Instruction::GetElementPtr: {
-      const GEPOperator *GEP = cast<GEPOperator>(U);
+      const auto *GEP = cast<GEPOperator>(U);
       return TargetTTI->getGEPCost(GEP->getSourceElementType(),
                                    GEP->getPointerOperand(),
-                                   Operands.drop_front());
+                                   Operands.drop_front(), CostKind);
     }
     case Instruction::Add:
     case Instruction::FAdd:
     case Instruction::Sub:
     case Instruction::FSub:
     case Instruction::Mul:
     case Instruction::FMul:
     case Instruction::UDiv:

llvm/include/llvm/CodeGen/BasicTTIImpl.h

public:
 
   InstructionCost getRegUsageForType(Type *Ty) {
     InstructionCost Val = getTLI()->getTypeLegalizationCost(DL, Ty).first;
     assert(Val >= 0 && "Negative cost!");
     return Val;
   }
 
   InstructionCost getGEPCost(Type *PointeeType, const Value *Ptr,
-                             ArrayRef<const Value *> Operands) {
-    return BaseT::getGEPCost(PointeeType, Ptr, Operands);
+                             ArrayRef<const Value *> Operands,
+                             TTI::TargetCostKind CostKind) {
+    return BaseT::getGEPCost(PointeeType, Ptr, Operands, CostKind);
   }
 
   unsigned getEstimatedNumberOfCaseClusters(const SwitchInst &SI,
                                             unsigned &JumpTableSize,
                                             ProfileSummaryInfo *PSI,
                                             BlockFrequencyInfo *BFI) {
     /// Try to find the estimated number of clusters. Note that the number of
     /// clusters identified in this function could be different from the actual
else
       Cost += getScalarizationOverhead(RetTy, false, true);
 
     return Cost;
   }
 
   unsigned getMaxInterleaveFactor(unsigned VF) { return 1; }
 
   InstructionCost getArithmeticInstrCost(
-      unsigned Opcode, Type *Ty,
-      TTI::TargetCostKind CostKind = TTI::TCK_RecipThroughput,
+      unsigned Opcode, Type *Ty, TTI::TargetCostKind CostKind,
       TTI::OperandValueKind Opd1Info = TTI::OK_AnyValue,
       TTI::OperandValueKind Opd2Info = TTI::OK_AnyValue,
       TTI::OperandValueProperties Opd1PropInfo = TTI::OP_None,
       TTI::OperandValueProperties Opd2PropInfo = TTI::OP_None,
       ArrayRef<const Value *> Args = ArrayRef<const Value *>(),
       const Instruction *CxtI = nullptr) {
     // Check if any of the operands are vector operands.
     const TargetLoweringBase *TLI = getTLI();

   /// argument types Tys. F might be nullptr, in this case the cost of an
   /// arbitrary call with the specified signature will be returned.
   /// This is used, for instance,  when we estimate call of a vector
   /// counterpart of the given function.
   /// \param F Called function, might be nullptr.
   /// \param RetTy Return value types.
   /// \param Tys Argument types.
   /// \returns The cost of Call instruction.
-  InstructionCost
-  getCallInstrCost(Function *F, Type *RetTy, ArrayRef<Type *> Tys,
-                   TTI::TargetCostKind CostKind = TTI::TCK_SizeAndLatency) {
+  InstructionCost getCallInstrCost(Function *F, Type *RetTy,
+                                   ArrayRef<Type *> Tys,
+                                   TTI::TargetCostKind CostKind) {
     return 10;
   }
 
   unsigned getNumberOfParts(Type *Tp) {
     std::pair<InstructionCost, MVT> LT =
         getTLI()->getTypeLegalizationCost(DL, Tp);
     return *LT.first.getValue();
   }
InstructionCost getTreeReductionCost(unsigned Opcode, VectorType *Ty,
     // The minimal length of the vector is limited by the real length of vector
     // operations performed on the current platform. That's why several final
     // reduction operations are performed on the vectors with the same
     // architecture-dependent length.
 
     // By default reductions need one shuffle per reduction level.
     ShuffleCost += NumReduxLevels * thisT()->getShuffleCost(
                                      TTI::SK_PermuteSingleSrc, Ty, None, 0, Ty);
-    ArithCost += NumReduxLevels * thisT()->getArithmeticInstrCost(Opcode, Ty);
+    ArithCost +=
+        NumReduxLevels * thisT()->getArithmeticInstrCost(Opcode, Ty, CostKind);
     return ShuffleCost + ArithCost +
            thisT()->getVectorInstrCost(Instruction::ExtractElement, Ty, 0);
   }
 
   /// Try to calculate the cost of performing strict (in-order) reductions,
   /// which involves doing a sequence of floating point additions in lane
   /// order, starting with an initial value. For example, consider a scalar
   /// initial value 'InitVal' of type float and a vector of type <4 x float>:

llvm/lib/Target/AArch64/AArch64TargetTransformInfo.h

public:
 
   InstructionCost getArithmeticReductionCostSVE(unsigned Opcode,
                                                 VectorType *ValTy,
                                                 TTI::TargetCostKind CostKind);
 
   InstructionCost getSpliceCost(VectorType *Tp, int Index);
 
   InstructionCost getArithmeticInstrCost(
-      unsigned Opcode, Type *Ty,
-      TTI::TargetCostKind CostKind = TTI::TCK_RecipThroughput,
+      unsigned Opcode, Type *Ty, TTI::TargetCostKind CostKind,
       TTI::OperandValueKind Opd1Info = TTI::OK_AnyValue,
       TTI::OperandValueKind Opd2Info = TTI::OK_AnyValue,
       TTI::OperandValueProperties Opd1PropInfo = TTI::OP_None,
       TTI::OperandValueProperties Opd2PropInfo = TTI::OP_None,
       ArrayRef<const Value *> Args = ArrayRef<const Value *>(),
       const Instruction *CxtI = nullptr);
 
   InstructionCost getAddressComputationCost(Type *Ty, ScalarEvolution *SE,
bool isLegalNTStore(Type *DataType, Align Alignment) {
     }
     return BaseT::isLegalNTStore(DataType, Alignment);
   }
 
   bool enableOrderedReductions() const { return true; }
 
   InstructionCost getInterleavedMemoryOpCost(
       unsigned Opcode, Type *VecTy, unsigned Factor, ArrayRef<unsigned> Indices,
-      Align Alignment, unsigned AddressSpace,
-      TTI::TargetCostKind CostKind = TTI::TCK_SizeAndLatency,
+      Align Alignment, unsigned AddressSpace, TTI::TargetCostKind CostKind,
       bool UseMaskForCond = false, bool UseMaskForGaps = false);
 
   bool
   shouldConsiderAddressTypePromotion(const Instruction &I,
                                      bool &AllowPromotionWithoutCommonHeader);
 
   bool shouldExpandReduction(const IntrinsicInst *II) const { return false; }
 
   unsigned getGISelRematGlobalCost() const {
     return 2;
   }
 
   bool supportsScalableVectors() const { return ST->hasSVE(); }
 
   bool isLegalToVectorizeReduction(const RecurrenceDescriptor &RdxDesc,
                                    ElementCount VF) const;
 
-  InstructionCost getArithmeticReductionCost(
-      unsigned Opcode, VectorType *Ty, Optional<FastMathFlags> FMF,
-      TTI::TargetCostKind CostKind = TTI::TCK_RecipThroughput);
+  InstructionCost getArithmeticReductionCost(unsigned Opcode, VectorType *Ty,
+                                             Optional<FastMathFlags> FMF,
+                                             TTI::TargetCostKind CostKind);
 
   InstructionCost getShuffleCost(TTI::ShuffleKind Kind, VectorType *Tp,
                                  ArrayRef<int> Mask, int Index,
                                  VectorType *SubTp);
   /// @}
 };
 
 } // end namespace llvm
 
 #endif // LLVM_LIB_TARGET_AARCH64_AARCH64TARGETTRANSFORMINFO_H

llvm/lib/Target/AMDGPU/AMDGPUTargetTransformInfo.h

class GCNTTIImpl final : public BasicTTIImplBase<GCNTTIImpl> {
 
   const GCNSubtarget *getST() const { return ST; }
   const SITargetLowering *getTLI() const { return TLI; }
 
   static inline int getFullRateInstrCost() {
     return TargetTransformInfo::TCC_Basic;
   }
 
-  static inline int getHalfRateInstrCost(
-      TTI::TargetCostKind CostKind = TTI::TCK_RecipThroughput) {
+  static inline int getHalfRateInstrCost(TTI::TargetCostKind CostKind) {
     return CostKind == TTI::TCK_CodeSize ? 2
                                          : 2 * TargetTransformInfo::TCC_Basic;
   }
 
   // TODO: The size is usually 8 bytes, but takes 4x as many cycles. Maybe
   // should be 2 or 4.
-  static inline int getQuarterRateInstrCost(
-      TTI::TargetCostKind CostKind = TTI::TCK_RecipThroughput) {
+  static inline int getQuarterRateInstrCost(TTI::TargetCostKind CostKind) {
     return CostKind == TTI::TCK_CodeSize ? 2
                                          : 4 * TargetTransformInfo::TCC_Basic;
   }
 
   // On some parts, normal fp64 operations are half rate, and others
   // quarter. This also applies to some integer operations.
-  int get64BitInstrCost(
-      TTI::TargetCostKind CostKind = TTI::TCK_RecipThroughput) const;
+  int get64BitInstrCost(TTI::TargetCostKind CostKind) const;
 
 public:
   explicit GCNTTIImpl(const AMDGPUTargetMachine *TM, const Function &F);
 
   bool hasBranchDivergence() { return true; }
   bool useGPUDivergenceAnalysis() const;
 
   void getUnrollingPreferences(Loop *L, ScalarEvolution &SE,
void getMemcpyLoopResidualLoweringType(SmallVectorImpl<Type *> &OpsOut,
                                          unsigned DestAddrSpace,
                                          unsigned SrcAlign,
                                          unsigned DestAlign) const;
   unsigned getMaxInterleaveFactor(unsigned VF);
 
   bool getTgtMemIntrinsic(IntrinsicInst *Inst, MemIntrinsicInfo &Info) const;
 
   InstructionCost getArithmeticInstrCost(
-      unsigned Opcode, Type *Ty,
-      TTI::TargetCostKind CostKind = TTI::TCK_RecipThroughput,
+      unsigned Opcode, Type *Ty, TTI::TargetCostKind CostKind,
       TTI::OperandValueKind Opd1Info = TTI::OK_AnyValue,
       TTI::OperandValueKind Opd2Info = TTI::OK_AnyValue,
       TTI::OperandValueProperties Opd1PropInfo = TTI::OP_None,
       TTI::OperandValueProperties Opd2PropInfo = TTI::OP_None,
       ArrayRef<const Value *> Args = ArrayRef<const Value *>(),
       const Instruction *CxtI = nullptr);
 
   InstructionCost getCFInstrCost(unsigned Opcode, TTI::TargetCostKind CostKind,
public:
 
   unsigned getInliningThresholdMultiplier() { return 11; }
   unsigned adjustInliningThreshold(const CallBase *CB) const;
 
   int getInlinerVectorBonusPercent() { return 0; }
 
   InstructionCost getArithmeticReductionCost(
       unsigned Opcode, VectorType *Ty, Optional<FastMathFlags> FMF,
-      TTI::TargetCostKind CostKind = TTI::TCK_RecipThroughput);
+      TTI::TargetCostKind CostKind);
 
   InstructionCost getIntrinsicInstrCost(const IntrinsicCostAttributes &ICA,
                                         TTI::TargetCostKind CostKind);
   InstructionCost getMinMaxReductionCost(
       VectorType *Ty, VectorType *CondTy, bool IsUnsigned,
-      TTI::TargetCostKind CostKind = TTI::TCK_RecipThroughput);
+      TTI::TargetCostKind CostKind);
 };
 
 } // end namespace llvm
 
 #endif // LLVM_LIB_TARGET_AMDGPU_AMDGPUTARGETTRANSFORMINFO_H

llvm/lib/Target/ARM/ARMTargetTransformInfo.h

public:
 
   InstructionCost getVectorInstrCost(unsigned Opcode, Type *Val,
                                      unsigned Index);
 
   InstructionCost getAddressComputationCost(Type *Val, ScalarEvolution *SE,
                                             const SCEV *Ptr);
 
   InstructionCost getArithmeticInstrCost(
-      unsigned Opcode, Type *Ty,
-      TTI::TargetCostKind CostKind = TTI::TCK_RecipThroughput,
+      unsigned Opcode, Type *Ty, TTI::TargetCostKind CostKind,
       TTI::OperandValueKind Op1Info = TTI::OK_AnyValue,
       TTI::OperandValueKind Op2Info = TTI::OK_AnyValue,
       TTI::OperandValueProperties Opd1PropInfo = TTI::OP_None,
       TTI::OperandValueProperties Opd2PropInfo = TTI::OP_None,
       ArrayRef<const Value *> Args = ArrayRef<const Value *>(),
       const Instruction *CxtI = nullptr);
 
   InstructionCost getMemoryOpCost(unsigned Opcode, Type *Src,
                                   MaybeAlign Alignment, unsigned AddressSpace,
                                   TTI::TargetCostKind CostKind,
                                   const Instruction *I = nullptr);
 
   InstructionCost getMaskedMemoryOpCost(unsigned Opcode, Type *Src,
                                         Align Alignment, unsigned AddressSpace,
                                         TTI::TargetCostKind CostKind);
 
   InstructionCost getInterleavedMemoryOpCost(
       unsigned Opcode, Type *VecTy, unsigned Factor, ArrayRef<unsigned> Indices,
-      Align Alignment, unsigned AddressSpace,
-      TTI::TargetCostKind CostKind = TTI::TCK_SizeAndLatency,
+      Align Alignment, unsigned AddressSpace, TTI::TargetCostKind CostKind,
       bool UseMaskForCond = false, bool UseMaskForGaps = false);
 
   InstructionCost getGatherScatterOpCost(unsigned Opcode, Type *DataTy,
                                          const Value *Ptr, bool VariableMask,
                                          Align Alignment,
                                          TTI::TargetCostKind CostKind,
                                          const Instruction *I = nullptr);
 

llvm/lib/Target/BPF/BPFTargetTransformInfo.h

InstructionCost getCmpSelInstrCost(unsigned Opcode, Type *ValTy, Type *CondTy,
     if (Opcode == Instruction::Select)
       return SCEVCheapExpansionBudget.getValue();
 
     return BaseT::getCmpSelInstrCost(Opcode, ValTy, CondTy, VecPred, CostKind,
                                      I);
   }
 
   InstructionCost getArithmeticInstrCost(
-    unsigned Opcode, Type *Ty,
-    TTI::TargetCostKind CostKind = TTI::TCK_RecipThroughput,
+      unsigned Opcode, Type *Ty, TTI::TargetCostKind CostKind,
       TTI::OperandValueKind Opd1Info = TTI::OK_AnyValue,
       TTI::OperandValueKind Opd2Info = TTI::OK_AnyValue,
       TTI::OperandValueProperties Opd1PropInfo = TTI::OP_None,
       TTI::OperandValueProperties Opd2PropInfo = TTI::OP_None,
     ArrayRef<const Value *> Args = ArrayRef<const Value *>(),
     const Instruction *CxtI = nullptr) {
       int ISD = TLI->InstructionOpcodeToISD(Opcode);
       if (ISD == ISD::ADD && CostKind == TTI::TCK_RecipThroughput)
         return SCEVCheapExpansionBudget.getValue() + 1;
 
       return BaseT::getArithmeticInstrCost(Opcode, Ty, CostKind, Opd1Info,
                                            Opd2Info, Opd1PropInfo,
                                            Opd2PropInfo);
   }
 };
 
 } // end namespace llvm
 
 #endif // LLVM_LIB_TARGET_BPF_BPFTARGETTRANSFORMINFO_H

llvm/lib/Target/Hexagon/HexagonTargetTransformInfo.h

public:
   InstructionCost getIntrinsicInstrCost(const IntrinsicCostAttributes &ICA,
                                         TTI::TargetCostKind CostKind);
   InstructionCost getAddressComputationCost(Type *Tp, ScalarEvolution *SE,
                                             const SCEV *S);
   InstructionCost getMemoryOpCost(unsigned Opcode, Type *Src,
                                   MaybeAlign Alignment, unsigned AddressSpace,
                                   TTI::TargetCostKind CostKind,
                                   const Instruction *I = nullptr);
-  InstructionCost
-  getMaskedMemoryOpCost(unsigned Opcode, Type *Src, Align Alignment,
-                        unsigned AddressSpace,
-                        TTI::TargetCostKind CostKind = TTI::TCK_SizeAndLatency);
+  InstructionCost getMaskedMemoryOpCost(unsigned Opcode, Type *Src,
+                                        Align Alignment, unsigned AddressSpace,
+                                        TTI::TargetCostKind CostKind);
   InstructionCost getShuffleCost(TTI::ShuffleKind Kind, Type *Tp,
                                  ArrayRef<int> Mask, int Index, Type *SubTp);
   InstructionCost getGatherScatterOpCost(unsigned Opcode, Type *DataTy,
                                          const Value *Ptr, bool VariableMask,
                                          Align Alignment,
                                          TTI::TargetCostKind CostKind,
                                          const Instruction *I);
   InstructionCost getInterleavedMemoryOpCost(
       unsigned Opcode, Type *VecTy, unsigned Factor, ArrayRef<unsigned> Indices,
-      Align Alignment, unsigned AddressSpace,
-      TTI::TargetCostKind CostKind = TTI::TCK_SizeAndLatency,
+      Align Alignment, unsigned AddressSpace, TTI::TargetCostKind CostKind,
       bool UseMaskForCond = false, bool UseMaskForGaps = false);
   InstructionCost getCmpSelInstrCost(unsigned Opcode, Type *ValTy, Type *CondTy,
                                      CmpInst::Predicate VecPred,
                                      TTI::TargetCostKind CostKind,
                                      const Instruction *I = nullptr);
   InstructionCost getArithmeticInstrCost(
-      unsigned Opcode, Type *Ty,
-      TTI::TargetCostKind CostKind = TTI::TCK_RecipThroughput,
+      unsigned Opcode, Type *Ty, TTI::TargetCostKind CostKind,
       TTI::OperandValueKind Opd1Info = TTI::OK_AnyValue,
       TTI::OperandValueKind Opd2Info = TTI::OK_AnyValue,
       TTI::OperandValueProperties Opd1PropInfo = TTI::OP_None,
       TTI::OperandValueProperties Opd2PropInfo = TTI::OP_None,
       ArrayRef<const Value *> Args = ArrayRef<const Value *>(),
       const Instruction *CxtI = nullptr);
   InstructionCost getCastInstrCost(unsigned Opcode, Type *Dst, Type *Src,
                                    TTI::CastContextHint CCH,

llvm/lib/Target/Lanai/LanaiTargetTransformInfo.h

public:
 
   InstructionCost getIntImmCostIntrin(Intrinsic::ID IID, unsigned Idx,
                                       const APInt &Imm, Type *Ty,
                                       TTI::TargetCostKind CostKind) {
     return getIntImmCost(Imm, Ty, CostKind);
   }
 
   InstructionCost getArithmeticInstrCost(
-      unsigned Opcode, Type *Ty,
-      TTI::TargetCostKind CostKind = TTI::TCK_RecipThroughput,
+      unsigned Opcode, Type *Ty, TTI::TargetCostKind CostKind,
       TTI::OperandValueKind Opd1Info = TTI::OK_AnyValue,
       TTI::OperandValueKind Opd2Info = TTI::OK_AnyValue,
       TTI::OperandValueProperties Opd1PropInfo = TTI::OP_None,
       TTI::OperandValueProperties Opd2PropInfo = TTI::OP_None,
       ArrayRef<const Value *> Args = ArrayRef<const Value *>(),
       const Instruction *CxtI = nullptr) {
     int ISD = TLI->InstructionOpcodeToISD(Opcode);
 

llvm/lib/Target/NVPTX/NVPTXTargetTransformInfo.h

bool areInlineCompatible(const Function *Caller,
     return true;
   }
 
   // Increase the inlining cost threshold by a factor of 5, reflecting that
   // calls are particularly expensive in NVPTX.
   unsigned getInliningThresholdMultiplier() { return 5; }
 
   InstructionCost getArithmeticInstrCost(
-      unsigned Opcode, Type *Ty,
-      TTI::TargetCostKind CostKind = TTI::TCK_RecipThroughput,
+      unsigned Opcode, Type *Ty, TTI::TargetCostKind CostKind,
       TTI::OperandValueKind Opd1Info = TTI::OK_AnyValue,
       TTI::OperandValueKind Opd2Info = TTI::OK_AnyValue,
       TTI::OperandValueProperties Opd1PropInfo = TTI::OP_None,
       TTI::OperandValueProperties Opd2PropInfo = TTI::OP_None,
       ArrayRef<const Value *> Args = ArrayRef<const Value *>(),
       const Instruction *CxtI = nullptr);
 
   void getUnrollingPreferences(Loop *L, ScalarEvolution &SE,

llvm/lib/Target/PowerPC/PPCTargetTransformInfo.h

public:
   const char* getRegisterClassName(unsigned ClassID) const;
   TypeSize getRegisterBitWidth(TargetTransformInfo::RegisterKind K) const;
   unsigned getCacheLineSize() const override;
   unsigned getPrefetchDistance() const override;
   unsigned getMaxInterleaveFactor(unsigned VF);
   InstructionCost vectorCostAdjustment(InstructionCost Cost, unsigned Opcode,
                                        Type *Ty1, Type *Ty2);
   InstructionCost getArithmeticInstrCost(
-      unsigned Opcode, Type *Ty,
-      TTI::TargetCostKind CostKind = TTI::TCK_RecipThroughput,
+      unsigned Opcode, Type *Ty, TTI::TargetCostKind CostKind,
       TTI::OperandValueKind Opd1Info = TTI::OK_AnyValue,
       TTI::OperandValueKind Opd2Info = TTI::OK_AnyValue,
       TTI::OperandValueProperties Opd1PropInfo = TTI::OP_None,
       TTI::OperandValueProperties Opd2PropInfo = TTI::OP_None,
       ArrayRef<const Value *> Args = ArrayRef<const Value *>(),
       const Instruction *CxtI = nullptr);
   InstructionCost getShuffleCost(TTI::ShuffleKind Kind, Type *Tp,
                                  ArrayRef<int> Mask, int Index, Type *SubTp);
public:
   InstructionCost getVectorInstrCost(unsigned Opcode, Type *Val,
                                      unsigned Index);
   InstructionCost getMemoryOpCost(unsigned Opcode, Type *Src,
                                   MaybeAlign Alignment, unsigned AddressSpace,
                                   TTI::TargetCostKind CostKind,
                                   const Instruction *I = nullptr);
   InstructionCost getInterleavedMemoryOpCost(
       unsigned Opcode, Type *VecTy, unsigned Factor, ArrayRef<unsigned> Indices,
-      Align Alignment, unsigned AddressSpace,
-      TTI::TargetCostKind CostKind = TTI::TCK_SizeAndLatency,
+      Align Alignment, unsigned AddressSpace, TTI::TargetCostKind CostKind,
       bool UseMaskForCond = false, bool UseMaskForGaps = false);
   InstructionCost getIntrinsicInstrCost(const IntrinsicCostAttributes &ICA,
                                         TTI::TargetCostKind CostKind);
   bool areFunctionArgsABICompatible(const Function *Caller,
                                     const Function *Callee,
                                     SmallPtrSetImpl<Argument *> &Args) const;
   /// @}
 };
 
 } // end namespace llvm
 
 #endif

llvm/lib/Target/SystemZ/SystemZTargetTransformInfo.h

public:
 
   bool hasDivRemOp(Type *DataType, bool IsSigned);
   bool prefersVectorizedAddressing() { return false; }
   bool LSRWithInstrQueries() { return true; }
   bool supportsEfficientVectorElementLoadStore() { return true; }
   bool enableInterleavedAccessVectorization() { return true; }
 
   InstructionCost getArithmeticInstrCost(
-      unsigned Opcode, Type *Ty,
-      TTI::TargetCostKind CostKind = TTI::TCK_RecipThroughput,
+      unsigned Opcode, Type *Ty, TTI::TargetCostKind CostKind,
       TTI::OperandValueKind Opd1Info = TTI::OK_AnyValue,
       TTI::OperandValueKind Opd2Info = TTI::OK_AnyValue,
       TTI::OperandValueProperties Opd1PropInfo = TTI::OP_None,
       TTI::OperandValueProperties Opd2PropInfo = TTI::OP_None,
       ArrayRef<const Value *> Args = ArrayRef<const Value *>(),
       const Instruction *CxtI = nullptr);
   InstructionCost getShuffleCost(TTI::ShuffleKind Kind, VectorType *Tp,
                                  ArrayRef<int> Mask, int Index,
public:
   bool isFoldableLoad(const LoadInst *Ld, const Instruction *&FoldedValue);
   InstructionCost getMemoryOpCost(unsigned Opcode, Type *Src,
                                   MaybeAlign Alignment, unsigned AddressSpace,
                                   TTI::TargetCostKind CostKind,
                                   const Instruction *I = nullptr);
 
   InstructionCost getInterleavedMemoryOpCost(
       unsigned Opcode, Type *VecTy, unsigned Factor, ArrayRef<unsigned> Indices,
-      Align Alignment, unsigned AddressSpace,
-      TTI::TargetCostKind CostKind = TTI::TCK_SizeAndLatency,
+      Align Alignment, unsigned AddressSpace, TTI::TargetCostKind CostKind,
       bool UseMaskForCond = false, bool UseMaskForGaps = false);
 
   InstructionCost getIntrinsicInstrCost(const IntrinsicCostAttributes &ICA,
                                         TTI::TargetCostKind CostKind);
   /// @}
 };
 
 } // end namespace llvm
 
 #endif

llvm/lib/Target/WebAssembly/WebAssemblyTargetTransformInfo.h

public:
   /// @}
 
   /// \name Vector TTI Implementations
   /// @{
 
   unsigned getNumberOfRegisters(unsigned ClassID) const;
   TypeSize getRegisterBitWidth(TargetTransformInfo::RegisterKind K) const;
   InstructionCost getArithmeticInstrCost(
-      unsigned Opcode, Type *Ty,
-      TTI::TargetCostKind CostKind = TTI::TCK_SizeAndLatency,
+      unsigned Opcode, Type *Ty, TTI::TargetCostKind CostKind,
       TTI::OperandValueKind Opd1Info = TTI::OK_AnyValue,
       TTI::OperandValueKind Opd2Info = TTI::OK_AnyValue,
       TTI::OperandValueProperties Opd1PropInfo = TTI::OP_None,
       TTI::OperandValueProperties Opd2PropInfo = TTI::OP_None,
       ArrayRef<const Value *> Args = ArrayRef<const Value *>(),
       const Instruction *CxtI = nullptr);
   InstructionCost getVectorInstrCost(unsigned Opcode, Type *Val,
                                      unsigned Index);

llvm/lib/Target/X86/X86TargetTransformInfo.h

public:
   /// \name Vector TTI Implementations
   /// @{
 
   unsigned getNumberOfRegisters(unsigned ClassID) const;
   TypeSize getRegisterBitWidth(TargetTransformInfo::RegisterKind K) const;
   unsigned getLoadStoreVecRegBitWidth(unsigned AS) const;
   unsigned getMaxInterleaveFactor(unsigned VF);
   InstructionCost getArithmeticInstrCost(
-      unsigned Opcode, Type *Ty,
-      TTI::TargetCostKind CostKind = TTI::TCK_RecipThroughput,
+      unsigned Opcode, Type *Ty, TTI::TargetCostKind CostKind,
       TTI::OperandValueKind Opd1Info = TTI::OK_AnyValue,
       TTI::OperandValueKind Opd2Info = TTI::OK_AnyValue,
       TTI::OperandValueProperties Opd1PropInfo = TTI::OP_None,
       TTI::OperandValueProperties Opd2PropInfo = TTI::OP_None,
       ArrayRef<const Value *> Args = ArrayRef<const Value *>(),
       const Instruction *CxtI = nullptr);
   InstructionCost getShuffleCost(TTI::ShuffleKind Kind, VectorType *Tp,
                                  ArrayRef<int> Mask, int Index,
InstructionCost getVectorInstrCost(unsigned Opcode, Type *Val,
                                      unsigned Index);
   InstructionCost getScalarizationOverhead(VectorType *Ty,
                                            const APInt &DemandedElts,
                                            bool Insert, bool Extract);
   InstructionCost getMemoryOpCost(unsigned Opcode, Type *Src,
                                   MaybeAlign Alignment, unsigned AddressSpace,
                                   TTI::TargetCostKind CostKind,
                                   const Instruction *I = nullptr);
-  InstructionCost
-  getMaskedMemoryOpCost(unsigned Opcode, Type *Src, Align Alignment,
-                        unsigned AddressSpace,
-                        TTI::TargetCostKind CostKind = TTI::TCK_SizeAndLatency);
+  InstructionCost getMaskedMemoryOpCost(unsigned Opcode, Type *Src,
+                                        Align Alignment, unsigned AddressSpace,
+                                        TTI::TargetCostKind CostKind);
   InstructionCost getGatherScatterOpCost(unsigned Opcode, Type *DataTy,
                                          const Value *Ptr, bool VariableMask,
                                          Align Alignment,
                                          TTI::TargetCostKind CostKind,
                                          const Instruction *I);
   InstructionCost getAddressComputationCost(Type *PtrTy, ScalarEvolution *SE,
                                             const SCEV *Ptr);
 
public:
   unsigned getAtomicMemIntrinsicMaxElementSize() const;
 
   InstructionCost
   getTypeBasedIntrinsicInstrCost(const IntrinsicCostAttributes &ICA,
                                  TTI::TargetCostKind CostKind);
   InstructionCost getIntrinsicInstrCost(const IntrinsicCostAttributes &ICA,
                                         TTI::TargetCostKind CostKind);
 
-  InstructionCost getArithmeticReductionCost(
-      unsigned Opcode, VectorType *Ty, Optional<FastMathFlags> FMF,
-      TTI::TargetCostKind CostKind = TTI::TCK_SizeAndLatency);
+  InstructionCost getArithmeticReductionCost(unsigned Opcode, VectorType *Ty,
+                                             Optional<FastMathFlags> FMF,
+                                             TTI::TargetCostKind CostKind);
 
   InstructionCost getMinMaxCost(Type *Ty, Type *CondTy, bool IsUnsigned);
 
   InstructionCost getMinMaxReductionCost(VectorType *Ty, VectorType *CondTy,
                                          bool IsUnsigned,
                                          TTI::TargetCostKind CostKind);
 
   InstructionCost getInterleavedMemoryOpCost(
       unsigned Opcode, Type *VecTy, unsigned Factor, ArrayRef<unsigned> Indices,
-      Align Alignment, unsigned AddressSpace,
-      TTI::TargetCostKind CostKind = TTI::TCK_SizeAndLatency,
+      Align Alignment, unsigned AddressSpace, TTI::TargetCostKind CostKind,
       bool UseMaskForCond = false, bool UseMaskForGaps = false);
   InstructionCost getInterleavedMemoryOpCostAVX512(
       unsigned Opcode, FixedVectorType *VecTy, unsigned Factor,
       ArrayRef<unsigned> Indices, Align Alignment, unsigned AddressSpace,
-      TTI::TargetCostKind CostKind = TTI::TCK_SizeAndLatency,
-      bool UseMaskForCond = false, bool UseMaskForGaps = false);
+      TTI::TargetCostKind CostKind, bool UseMaskForCond = false,
+      bool UseMaskForGaps = false);
   InstructionCost getInterleavedMemoryOpCostAVX2(
       unsigned Opcode, FixedVectorType *VecTy, unsigned Factor,
       ArrayRef<unsigned> Indices, Align Alignment, unsigned AddressSpace,
-      TTI::TargetCostKind CostKind = TTI::TCK_SizeAndLatency,
-      bool UseMaskForCond = false, bool UseMaskForGaps = false);
+      TTI::TargetCostKind CostKind, bool UseMaskForCond = false,
+      bool UseMaskForGaps = false);
 
   InstructionCost getIntImmCost(int64_t);
 
   InstructionCost getIntImmCost(const APInt &Imm, Type *Ty,
                                 TTI::TargetCostKind CostKind);
 
   InstructionCost getCFInstrCost(unsigned Opcode, TTI::TargetCostKind CostKind,
                                  const Instruction *I = nullptr);