| //===------- CGHLSLBuiltins.cpp - Emit LLVM Code for HLSL builtins --------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This contains code to emit HLSL Builtin calls as LLVM code. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "CGBuiltin.h" |
| #include "CGHLSLRuntime.h" |
| #include "CodeGenFunction.h" |
| |
| using namespace clang; |
| using namespace CodeGen; |
| using namespace llvm; |
| |
| static Value *handleAsDoubleBuiltin(CodeGenFunction &CGF, const CallExpr *E) { |
| assert((E->getArg(0)->getType()->hasUnsignedIntegerRepresentation() && |
| E->getArg(1)->getType()->hasUnsignedIntegerRepresentation()) && |
| "asdouble operands types mismatch"); |
| Value *OpLowBits = CGF.EmitScalarExpr(E->getArg(0)); |
| Value *OpHighBits = CGF.EmitScalarExpr(E->getArg(1)); |
| |
| llvm::Type *ResultType = CGF.DoubleTy; |
| int N = 1; |
| if (auto *VTy = E->getArg(0)->getType()->getAs<clang::VectorType>()) { |
| N = VTy->getNumElements(); |
| ResultType = llvm::FixedVectorType::get(CGF.DoubleTy, N); |
| } |
| |
| if (CGF.CGM.getTarget().getTriple().isDXIL()) |
| return CGF.Builder.CreateIntrinsic( |
| /*ReturnType=*/ResultType, Intrinsic::dx_asdouble, |
| {OpLowBits, OpHighBits}, nullptr, "hlsl.asdouble"); |
| |
| if (!E->getArg(0)->getType()->isVectorType()) { |
| OpLowBits = CGF.Builder.CreateVectorSplat(1, OpLowBits); |
| OpHighBits = CGF.Builder.CreateVectorSplat(1, OpHighBits); |
| } |
| |
| llvm::SmallVector<int> Mask; |
| for (int i = 0; i < N; i++) { |
| Mask.push_back(i); |
| Mask.push_back(i + N); |
| } |
| |
| Value *BitVec = CGF.Builder.CreateShuffleVector(OpLowBits, OpHighBits, Mask); |
| |
| return CGF.Builder.CreateBitCast(BitVec, ResultType); |
| } |
| |
| static Value *handleHlslClip(const CallExpr *E, CodeGenFunction *CGF) { |
| Value *Op0 = CGF->EmitScalarExpr(E->getArg(0)); |
| |
| Constant *FZeroConst = ConstantFP::getZero(CGF->FloatTy); |
| Value *CMP; |
| Value *LastInstr; |
| |
| if (const auto *VecTy = E->getArg(0)->getType()->getAs<clang::VectorType>()) { |
| FZeroConst = ConstantVector::getSplat( |
| ElementCount::getFixed(VecTy->getNumElements()), FZeroConst); |
| auto *FCompInst = CGF->Builder.CreateFCmpOLT(Op0, FZeroConst); |
| CMP = CGF->Builder.CreateIntrinsic( |
| CGF->Builder.getInt1Ty(), CGF->CGM.getHLSLRuntime().getAnyIntrinsic(), |
| {FCompInst}); |
| } else { |
| CMP = CGF->Builder.CreateFCmpOLT(Op0, FZeroConst); |
| } |
| |
| if (CGF->CGM.getTarget().getTriple().isDXIL()) { |
| LastInstr = CGF->Builder.CreateIntrinsic(Intrinsic::dx_discard, {CMP}); |
| } else if (CGF->CGM.getTarget().getTriple().isSPIRV()) { |
| BasicBlock *LT0 = CGF->createBasicBlock("lt0", CGF->CurFn); |
| BasicBlock *End = CGF->createBasicBlock("end", CGF->CurFn); |
| |
| CGF->Builder.CreateCondBr(CMP, LT0, End); |
| |
| CGF->Builder.SetInsertPoint(LT0); |
| |
| CGF->Builder.CreateIntrinsic(Intrinsic::spv_discard, {}); |
| |
| LastInstr = CGF->Builder.CreateBr(End); |
| CGF->Builder.SetInsertPoint(End); |
| } else { |
| llvm_unreachable("Backend Codegen not supported."); |
| } |
| |
| return LastInstr; |
| } |
| |
| static Value *handleHlslSplitdouble(const CallExpr *E, CodeGenFunction *CGF) { |
| Value *Op0 = CGF->EmitScalarExpr(E->getArg(0)); |
| const auto *OutArg1 = dyn_cast<HLSLOutArgExpr>(E->getArg(1)); |
| const auto *OutArg2 = dyn_cast<HLSLOutArgExpr>(E->getArg(2)); |
| |
| CallArgList Args; |
| LValue Op1TmpLValue = |
| CGF->EmitHLSLOutArgExpr(OutArg1, Args, OutArg1->getType()); |
| LValue Op2TmpLValue = |
| CGF->EmitHLSLOutArgExpr(OutArg2, Args, OutArg2->getType()); |
| |
| if (CGF->getTarget().getCXXABI().areArgsDestroyedLeftToRightInCallee()) |
| Args.reverseWritebacks(); |
| |
| Value *LowBits = nullptr; |
| Value *HighBits = nullptr; |
| |
| if (CGF->CGM.getTarget().getTriple().isDXIL()) { |
| llvm::Type *RetElementTy = CGF->Int32Ty; |
| if (auto *Op0VecTy = E->getArg(0)->getType()->getAs<clang::VectorType>()) |
| RetElementTy = llvm::VectorType::get( |
| CGF->Int32Ty, ElementCount::getFixed(Op0VecTy->getNumElements())); |
| auto *RetTy = llvm::StructType::get(RetElementTy, RetElementTy); |
| |
| CallInst *CI = CGF->Builder.CreateIntrinsic( |
| RetTy, Intrinsic::dx_splitdouble, {Op0}, nullptr, "hlsl.splitdouble"); |
| |
| LowBits = CGF->Builder.CreateExtractValue(CI, 0); |
| HighBits = CGF->Builder.CreateExtractValue(CI, 1); |
| } else { |
| // For Non DXIL targets we generate the instructions. |
| |
| if (!Op0->getType()->isVectorTy()) { |
| FixedVectorType *DestTy = FixedVectorType::get(CGF->Int32Ty, 2); |
| Value *Bitcast = CGF->Builder.CreateBitCast(Op0, DestTy); |
| |
| LowBits = CGF->Builder.CreateExtractElement(Bitcast, (uint64_t)0); |
| HighBits = CGF->Builder.CreateExtractElement(Bitcast, 1); |
| } else { |
| int NumElements = 1; |
| if (const auto *VecTy = |
| E->getArg(0)->getType()->getAs<clang::VectorType>()) |
| NumElements = VecTy->getNumElements(); |
| |
| FixedVectorType *Uint32VecTy = |
| FixedVectorType::get(CGF->Int32Ty, NumElements * 2); |
| Value *Uint32Vec = CGF->Builder.CreateBitCast(Op0, Uint32VecTy); |
| if (NumElements == 1) { |
| LowBits = CGF->Builder.CreateExtractElement(Uint32Vec, (uint64_t)0); |
| HighBits = CGF->Builder.CreateExtractElement(Uint32Vec, 1); |
| } else { |
| SmallVector<int> EvenMask, OddMask; |
| for (int I = 0, E = NumElements; I != E; ++I) { |
| EvenMask.push_back(I * 2); |
| OddMask.push_back(I * 2 + 1); |
| } |
| LowBits = CGF->Builder.CreateShuffleVector(Uint32Vec, EvenMask); |
| HighBits = CGF->Builder.CreateShuffleVector(Uint32Vec, OddMask); |
| } |
| } |
| } |
| CGF->Builder.CreateStore(LowBits, Op1TmpLValue.getAddress()); |
| auto *LastInst = |
| CGF->Builder.CreateStore(HighBits, Op2TmpLValue.getAddress()); |
| CGF->EmitWritebacks(Args); |
| return LastInst; |
| } |
| |
| static Value *emitBufferStride(CodeGenFunction *CGF, const Expr *HandleExpr, |
| LValue &Stride) { |
| // Figure out the stride of the buffer elements from the handle type. |
| auto *HandleTy = |
| cast<HLSLAttributedResourceType>(HandleExpr->getType().getTypePtr()); |
| QualType ElementTy = HandleTy->getContainedType(); |
| Value *StrideValue = CGF->getTypeSize(ElementTy); |
| return CGF->Builder.CreateStore(StrideValue, Stride.getAddress()); |
| } |
| |
| // Return dot product intrinsic that corresponds to the QT scalar type |
| static Intrinsic::ID getDotProductIntrinsic(CGHLSLRuntime &RT, QualType QT) { |
| if (QT->isFloatingType()) |
| return RT.getFDotIntrinsic(); |
| if (QT->isSignedIntegerType()) |
| return RT.getSDotIntrinsic(); |
| assert(QT->isUnsignedIntegerType()); |
| return RT.getUDotIntrinsic(); |
| } |
| |
| static Intrinsic::ID getFirstBitHighIntrinsic(CGHLSLRuntime &RT, QualType QT) { |
| if (QT->hasSignedIntegerRepresentation()) { |
| return RT.getFirstBitSHighIntrinsic(); |
| } |
| |
| assert(QT->hasUnsignedIntegerRepresentation()); |
| return RT.getFirstBitUHighIntrinsic(); |
| } |
| |
| // Return wave active sum that corresponds to the QT scalar type |
| static Intrinsic::ID getWaveActiveSumIntrinsic(llvm::Triple::ArchType Arch, |
| CGHLSLRuntime &RT, QualType QT) { |
| switch (Arch) { |
| case llvm::Triple::spirv: |
| return Intrinsic::spv_wave_reduce_sum; |
| case llvm::Triple::dxil: { |
| if (QT->isUnsignedIntegerType()) |
| return Intrinsic::dx_wave_reduce_usum; |
| return Intrinsic::dx_wave_reduce_sum; |
| } |
| default: |
| llvm_unreachable("Intrinsic WaveActiveSum" |
| " not supported by target architecture"); |
| } |
| } |
| |
| // Return wave active max that corresponds to the QT scalar type |
| static Intrinsic::ID getWaveActiveMaxIntrinsic(llvm::Triple::ArchType Arch, |
| CGHLSLRuntime &RT, QualType QT) { |
| switch (Arch) { |
| case llvm::Triple::spirv: |
| if (QT->isUnsignedIntegerType()) |
| return Intrinsic::spv_wave_reduce_umax; |
| return Intrinsic::spv_wave_reduce_max; |
| case llvm::Triple::dxil: { |
| if (QT->isUnsignedIntegerType()) |
| return Intrinsic::dx_wave_reduce_umax; |
| return Intrinsic::dx_wave_reduce_max; |
| } |
| default: |
| llvm_unreachable("Intrinsic WaveActiveMax" |
| " not supported by target architecture"); |
| } |
| } |
| |
| // Return wave active min that corresponds to the QT scalar type |
| static Intrinsic::ID getWaveActiveMinIntrinsic(llvm::Triple::ArchType Arch, |
| CGHLSLRuntime &RT, QualType QT) { |
| switch (Arch) { |
| case llvm::Triple::spirv: |
| if (QT->isUnsignedIntegerType()) |
| return Intrinsic::spv_wave_reduce_umin; |
| return Intrinsic::spv_wave_reduce_min; |
| case llvm::Triple::dxil: { |
| if (QT->isUnsignedIntegerType()) |
| return Intrinsic::dx_wave_reduce_umin; |
| return Intrinsic::dx_wave_reduce_min; |
| } |
| default: |
| llvm_unreachable("Intrinsic WaveActiveMin" |
| " not supported by target architecture"); |
| } |
| } |
| |
| // Returns the mangled name for a builtin function that the SPIR-V backend |
| // will expand into a spec Constant. |
| static std::string getSpecConstantFunctionName(clang::QualType SpecConstantType, |
| ASTContext &Context) { |
| // The parameter types for our conceptual intrinsic function. |
| QualType ClangParamTypes[] = {Context.IntTy, SpecConstantType}; |
| |
| // Create a temporary FunctionDecl for the builtin fuction. It won't be |
| // added to the AST. |
| FunctionProtoType::ExtProtoInfo EPI; |
| QualType FnType = |
| Context.getFunctionType(SpecConstantType, ClangParamTypes, EPI); |
| DeclarationName FuncName = &Context.Idents.get("__spirv_SpecConstant"); |
| FunctionDecl *FnDeclForMangling = FunctionDecl::Create( |
| Context, Context.getTranslationUnitDecl(), SourceLocation(), |
| SourceLocation(), FuncName, FnType, /*TSI=*/nullptr, SC_Extern); |
| |
| // Attach the created parameter declarations to the function declaration. |
| SmallVector<ParmVarDecl *, 2> ParamDecls; |
| for (QualType ParamType : ClangParamTypes) { |
| ParmVarDecl *PD = ParmVarDecl::Create( |
| Context, FnDeclForMangling, SourceLocation(), SourceLocation(), |
| /*IdentifierInfo*/ nullptr, ParamType, /*TSI*/ nullptr, SC_None, |
| /*DefaultArg*/ nullptr); |
| ParamDecls.push_back(PD); |
| } |
| FnDeclForMangling->setParams(ParamDecls); |
| |
| // Get the mangled name. |
| std::string Name; |
| llvm::raw_string_ostream MangledNameStream(Name); |
| std::unique_ptr<MangleContext> Mangler(Context.createMangleContext()); |
| Mangler->mangleName(FnDeclForMangling, MangledNameStream); |
| MangledNameStream.flush(); |
| |
| return Name; |
| } |
| |
| Value *CodeGenFunction::EmitHLSLBuiltinExpr(unsigned BuiltinID, |
| const CallExpr *E, |
| ReturnValueSlot ReturnValue) { |
| if (!getLangOpts().HLSL) |
| return nullptr; |
| |
| switch (BuiltinID) { |
| case Builtin::BI__builtin_hlsl_adduint64: { |
| Value *OpA = EmitScalarExpr(E->getArg(0)); |
| Value *OpB = EmitScalarExpr(E->getArg(1)); |
| QualType Arg0Ty = E->getArg(0)->getType(); |
| uint64_t NumElements = Arg0Ty->castAs<VectorType>()->getNumElements(); |
| assert(Arg0Ty == E->getArg(1)->getType() && |
| "AddUint64 operand types must match"); |
| assert(Arg0Ty->hasIntegerRepresentation() && |
| "AddUint64 operands must have an integer representation"); |
| assert((NumElements == 2 || NumElements == 4) && |
| "AddUint64 operands must have 2 or 4 elements"); |
| |
| llvm::Value *LowA; |
| llvm::Value *HighA; |
| llvm::Value *LowB; |
| llvm::Value *HighB; |
| |
| // Obtain low and high words of inputs A and B |
| if (NumElements == 2) { |
| LowA = Builder.CreateExtractElement(OpA, (uint64_t)0, "LowA"); |
| HighA = Builder.CreateExtractElement(OpA, (uint64_t)1, "HighA"); |
| LowB = Builder.CreateExtractElement(OpB, (uint64_t)0, "LowB"); |
| HighB = Builder.CreateExtractElement(OpB, (uint64_t)1, "HighB"); |
| } else { |
| LowA = Builder.CreateShuffleVector(OpA, {0, 2}, "LowA"); |
| HighA = Builder.CreateShuffleVector(OpA, {1, 3}, "HighA"); |
| LowB = Builder.CreateShuffleVector(OpB, {0, 2}, "LowB"); |
| HighB = Builder.CreateShuffleVector(OpB, {1, 3}, "HighB"); |
| } |
| |
| // Use an uadd_with_overflow to compute the sum of low words and obtain a |
| // carry value |
| llvm::Value *Carry; |
| llvm::Value *LowSum = EmitOverflowIntrinsic( |
| *this, Intrinsic::uadd_with_overflow, LowA, LowB, Carry); |
| llvm::Value *ZExtCarry = |
| Builder.CreateZExt(Carry, HighA->getType(), "CarryZExt"); |
| |
| // Sum the high words and the carry |
| llvm::Value *HighSum = Builder.CreateAdd(HighA, HighB, "HighSum"); |
| llvm::Value *HighSumPlusCarry = |
| Builder.CreateAdd(HighSum, ZExtCarry, "HighSumPlusCarry"); |
| |
| if (NumElements == 4) { |
| return Builder.CreateShuffleVector(LowSum, HighSumPlusCarry, {0, 2, 1, 3}, |
| "hlsl.AddUint64"); |
| } |
| |
| llvm::Value *Result = PoisonValue::get(OpA->getType()); |
| Result = Builder.CreateInsertElement(Result, LowSum, (uint64_t)0, |
| "hlsl.AddUint64.upto0"); |
| Result = Builder.CreateInsertElement(Result, HighSumPlusCarry, (uint64_t)1, |
| "hlsl.AddUint64"); |
| return Result; |
| } |
| case Builtin::BI__builtin_hlsl_resource_getpointer: { |
| Value *HandleOp = EmitScalarExpr(E->getArg(0)); |
| Value *IndexOp = EmitScalarExpr(E->getArg(1)); |
| |
| llvm::Type *RetTy = ConvertType(E->getType()); |
| return Builder.CreateIntrinsic( |
| RetTy, CGM.getHLSLRuntime().getCreateResourceGetPointerIntrinsic(), |
| ArrayRef<Value *>{HandleOp, IndexOp}); |
| } |
| case Builtin::BI__builtin_hlsl_resource_uninitializedhandle: { |
| llvm::Type *HandleTy = CGM.getTypes().ConvertType(E->getType()); |
| return llvm::PoisonValue::get(HandleTy); |
| } |
| case Builtin::BI__builtin_hlsl_resource_handlefrombinding: { |
| llvm::Type *HandleTy = CGM.getTypes().ConvertType(E->getType()); |
| Value *RegisterOp = EmitScalarExpr(E->getArg(1)); |
| Value *SpaceOp = EmitScalarExpr(E->getArg(2)); |
| Value *RangeOp = EmitScalarExpr(E->getArg(3)); |
| Value *IndexOp = EmitScalarExpr(E->getArg(4)); |
| Value *Name = EmitScalarExpr(E->getArg(5)); |
| llvm::Intrinsic::ID IntrinsicID = |
| CGM.getHLSLRuntime().getCreateHandleFromBindingIntrinsic(); |
| SmallVector<Value *> Args{SpaceOp, RegisterOp, RangeOp, IndexOp, Name}; |
| return Builder.CreateIntrinsic(HandleTy, IntrinsicID, Args); |
| } |
| case Builtin::BI__builtin_hlsl_resource_handlefromimplicitbinding: { |
| llvm::Type *HandleTy = CGM.getTypes().ConvertType(E->getType()); |
| Value *OrderID = EmitScalarExpr(E->getArg(1)); |
| Value *SpaceOp = EmitScalarExpr(E->getArg(2)); |
| Value *RangeOp = EmitScalarExpr(E->getArg(3)); |
| Value *IndexOp = EmitScalarExpr(E->getArg(4)); |
| Value *Name = EmitScalarExpr(E->getArg(5)); |
| llvm::Intrinsic::ID IntrinsicID = |
| CGM.getHLSLRuntime().getCreateHandleFromImplicitBindingIntrinsic(); |
| SmallVector<Value *> Args{OrderID, SpaceOp, RangeOp, IndexOp, Name}; |
| return Builder.CreateIntrinsic(HandleTy, IntrinsicID, Args); |
| } |
| case Builtin::BI__builtin_hlsl_resource_counterhandlefromimplicitbinding: { |
| Value *MainHandle = EmitScalarExpr(E->getArg(0)); |
| if (!CGM.getTriple().isSPIRV()) |
| return MainHandle; |
| |
| llvm::Type *HandleTy = CGM.getTypes().ConvertType(E->getType()); |
| Value *OrderID = EmitScalarExpr(E->getArg(1)); |
| Value *SpaceOp = EmitScalarExpr(E->getArg(2)); |
| llvm::Intrinsic::ID IntrinsicID = |
| llvm::Intrinsic::spv_resource_counterhandlefromimplicitbinding; |
| SmallVector<Value *> Args{MainHandle, OrderID, SpaceOp}; |
| return Builder.CreateIntrinsic(HandleTy, IntrinsicID, Args); |
| } |
| case Builtin::BI__builtin_hlsl_resource_nonuniformindex: { |
| Value *IndexOp = EmitScalarExpr(E->getArg(0)); |
| llvm::Type *RetTy = ConvertType(E->getType()); |
| return Builder.CreateIntrinsic( |
| RetTy, CGM.getHLSLRuntime().getNonUniformResourceIndexIntrinsic(), |
| ArrayRef<Value *>{IndexOp}); |
| } |
| case Builtin::BI__builtin_hlsl_resource_getdimensions_x: { |
| Value *Handle = EmitScalarExpr(E->getArg(0)); |
| LValue Dim = EmitLValue(E->getArg(1)); |
| llvm::Type *RetTy = llvm::Type::getInt32Ty(getLLVMContext()); |
| Value *DimValue = Builder.CreateIntrinsic( |
| RetTy, CGM.getHLSLRuntime().getGetDimensionsXIntrinsic(), |
| ArrayRef<Value *>{Handle}); |
| return Builder.CreateStore(DimValue, Dim.getAddress()); |
| } |
| case Builtin::BI__builtin_hlsl_resource_getstride: { |
| LValue Stride = EmitLValue(E->getArg(1)); |
| return emitBufferStride(this, E->getArg(0), Stride); |
| } |
| case Builtin::BI__builtin_hlsl_all: { |
| Value *Op0 = EmitScalarExpr(E->getArg(0)); |
| return Builder.CreateIntrinsic( |
| /*ReturnType=*/llvm::Type::getInt1Ty(getLLVMContext()), |
| CGM.getHLSLRuntime().getAllIntrinsic(), ArrayRef<Value *>{Op0}, nullptr, |
| "hlsl.all"); |
| } |
| case Builtin::BI__builtin_hlsl_and: { |
| Value *Op0 = EmitScalarExpr(E->getArg(0)); |
| Value *Op1 = EmitScalarExpr(E->getArg(1)); |
| return Builder.CreateAnd(Op0, Op1, "hlsl.and"); |
| } |
| case Builtin::BI__builtin_hlsl_or: { |
| Value *Op0 = EmitScalarExpr(E->getArg(0)); |
| Value *Op1 = EmitScalarExpr(E->getArg(1)); |
| return Builder.CreateOr(Op0, Op1, "hlsl.or"); |
| } |
| case Builtin::BI__builtin_hlsl_any: { |
| Value *Op0 = EmitScalarExpr(E->getArg(0)); |
| return Builder.CreateIntrinsic( |
| /*ReturnType=*/llvm::Type::getInt1Ty(getLLVMContext()), |
| CGM.getHLSLRuntime().getAnyIntrinsic(), ArrayRef<Value *>{Op0}, nullptr, |
| "hlsl.any"); |
| } |
| case Builtin::BI__builtin_hlsl_asdouble: |
| return handleAsDoubleBuiltin(*this, E); |
| case Builtin::BI__builtin_hlsl_elementwise_clamp: { |
| Value *OpX = EmitScalarExpr(E->getArg(0)); |
| Value *OpMin = EmitScalarExpr(E->getArg(1)); |
| Value *OpMax = EmitScalarExpr(E->getArg(2)); |
| |
| QualType Ty = E->getArg(0)->getType(); |
| if (auto *VecTy = Ty->getAs<VectorType>()) |
| Ty = VecTy->getElementType(); |
| |
| Intrinsic::ID Intr; |
| if (Ty->isFloatingType()) { |
| Intr = CGM.getHLSLRuntime().getNClampIntrinsic(); |
| } else if (Ty->isUnsignedIntegerType()) { |
| Intr = CGM.getHLSLRuntime().getUClampIntrinsic(); |
| } else { |
| assert(Ty->isSignedIntegerType()); |
| Intr = CGM.getHLSLRuntime().getSClampIntrinsic(); |
| } |
| return Builder.CreateIntrinsic( |
| /*ReturnType=*/OpX->getType(), Intr, |
| ArrayRef<Value *>{OpX, OpMin, OpMax}, nullptr, "hlsl.clamp"); |
| } |
| case Builtin::BI__builtin_hlsl_crossf16: |
| case Builtin::BI__builtin_hlsl_crossf32: { |
| Value *Op0 = EmitScalarExpr(E->getArg(0)); |
| Value *Op1 = EmitScalarExpr(E->getArg(1)); |
| assert(E->getArg(0)->getType()->hasFloatingRepresentation() && |
| E->getArg(1)->getType()->hasFloatingRepresentation() && |
| "cross operands must have a float representation"); |
| // make sure each vector has exactly 3 elements |
| assert( |
| E->getArg(0)->getType()->castAs<VectorType>()->getNumElements() == 3 && |
| E->getArg(1)->getType()->castAs<VectorType>()->getNumElements() == 3 && |
| "input vectors must have 3 elements each"); |
| return Builder.CreateIntrinsic( |
| /*ReturnType=*/Op0->getType(), CGM.getHLSLRuntime().getCrossIntrinsic(), |
| ArrayRef<Value *>{Op0, Op1}, nullptr, "hlsl.cross"); |
| } |
| case Builtin::BI__builtin_hlsl_dot: { |
| Value *Op0 = EmitScalarExpr(E->getArg(0)); |
| Value *Op1 = EmitScalarExpr(E->getArg(1)); |
| llvm::Type *T0 = Op0->getType(); |
| llvm::Type *T1 = Op1->getType(); |
| |
| // If the arguments are scalars, just emit a multiply |
| if (!T0->isVectorTy() && !T1->isVectorTy()) { |
| if (T0->isFloatingPointTy()) |
| return Builder.CreateFMul(Op0, Op1, "hlsl.dot"); |
| |
| if (T0->isIntegerTy()) |
| return Builder.CreateMul(Op0, Op1, "hlsl.dot"); |
| |
| llvm_unreachable( |
| "Scalar dot product is only supported on ints and floats."); |
| } |
| // For vectors, validate types and emit the appropriate intrinsic |
| assert(CGM.getContext().hasSameUnqualifiedType(E->getArg(0)->getType(), |
| E->getArg(1)->getType()) && |
| "Dot product operands must have the same type."); |
| |
| auto *VecTy0 = E->getArg(0)->getType()->castAs<VectorType>(); |
| assert(VecTy0 && "Dot product argument must be a vector."); |
| |
| return Builder.CreateIntrinsic( |
| /*ReturnType=*/T0->getScalarType(), |
| getDotProductIntrinsic(CGM.getHLSLRuntime(), VecTy0->getElementType()), |
| ArrayRef<Value *>{Op0, Op1}, nullptr, "hlsl.dot"); |
| } |
| case Builtin::BI__builtin_hlsl_dot4add_i8packed: { |
| Value *X = EmitScalarExpr(E->getArg(0)); |
| Value *Y = EmitScalarExpr(E->getArg(1)); |
| Value *Acc = EmitScalarExpr(E->getArg(2)); |
| |
| Intrinsic::ID ID = CGM.getHLSLRuntime().getDot4AddI8PackedIntrinsic(); |
| // Note that the argument order disagrees between the builtin and the |
| // intrinsic here. |
| return Builder.CreateIntrinsic( |
| /*ReturnType=*/Acc->getType(), ID, ArrayRef<Value *>{Acc, X, Y}, |
| nullptr, "hlsl.dot4add.i8packed"); |
| } |
| case Builtin::BI__builtin_hlsl_dot4add_u8packed: { |
| Value *X = EmitScalarExpr(E->getArg(0)); |
| Value *Y = EmitScalarExpr(E->getArg(1)); |
| Value *Acc = EmitScalarExpr(E->getArg(2)); |
| |
| Intrinsic::ID ID = CGM.getHLSLRuntime().getDot4AddU8PackedIntrinsic(); |
| // Note that the argument order disagrees between the builtin and the |
| // intrinsic here. |
| return Builder.CreateIntrinsic( |
| /*ReturnType=*/Acc->getType(), ID, ArrayRef<Value *>{Acc, X, Y}, |
| nullptr, "hlsl.dot4add.u8packed"); |
| } |
| case Builtin::BI__builtin_hlsl_elementwise_firstbithigh: { |
| Value *X = EmitScalarExpr(E->getArg(0)); |
| |
| return Builder.CreateIntrinsic( |
| /*ReturnType=*/ConvertType(E->getType()), |
| getFirstBitHighIntrinsic(CGM.getHLSLRuntime(), E->getArg(0)->getType()), |
| ArrayRef<Value *>{X}, nullptr, "hlsl.firstbithigh"); |
| } |
| case Builtin::BI__builtin_hlsl_elementwise_firstbitlow: { |
| Value *X = EmitScalarExpr(E->getArg(0)); |
| |
| return Builder.CreateIntrinsic( |
| /*ReturnType=*/ConvertType(E->getType()), |
| CGM.getHLSLRuntime().getFirstBitLowIntrinsic(), ArrayRef<Value *>{X}, |
| nullptr, "hlsl.firstbitlow"); |
| } |
| case Builtin::BI__builtin_hlsl_lerp: { |
| Value *X = EmitScalarExpr(E->getArg(0)); |
| Value *Y = EmitScalarExpr(E->getArg(1)); |
| Value *S = EmitScalarExpr(E->getArg(2)); |
| if (!E->getArg(0)->getType()->hasFloatingRepresentation()) |
| llvm_unreachable("lerp operand must have a float representation"); |
| return Builder.CreateIntrinsic( |
| /*ReturnType=*/X->getType(), CGM.getHLSLRuntime().getLerpIntrinsic(), |
| ArrayRef<Value *>{X, Y, S}, nullptr, "hlsl.lerp"); |
| } |
| case Builtin::BI__builtin_hlsl_normalize: { |
| Value *X = EmitScalarExpr(E->getArg(0)); |
| |
| assert(E->getArg(0)->getType()->hasFloatingRepresentation() && |
| "normalize operand must have a float representation"); |
| |
| return Builder.CreateIntrinsic( |
| /*ReturnType=*/X->getType(), |
| CGM.getHLSLRuntime().getNormalizeIntrinsic(), ArrayRef<Value *>{X}, |
| nullptr, "hlsl.normalize"); |
| } |
| case Builtin::BI__builtin_hlsl_elementwise_degrees: { |
| Value *X = EmitScalarExpr(E->getArg(0)); |
| |
| assert(E->getArg(0)->getType()->hasFloatingRepresentation() && |
| "degree operand must have a float representation"); |
| |
| return Builder.CreateIntrinsic( |
| /*ReturnType=*/X->getType(), CGM.getHLSLRuntime().getDegreesIntrinsic(), |
| ArrayRef<Value *>{X}, nullptr, "hlsl.degrees"); |
| } |
| case Builtin::BI__builtin_hlsl_elementwise_frac: { |
| Value *Op0 = EmitScalarExpr(E->getArg(0)); |
| if (!E->getArg(0)->getType()->hasFloatingRepresentation()) |
| llvm_unreachable("frac operand must have a float representation"); |
| return Builder.CreateIntrinsic( |
| /*ReturnType=*/Op0->getType(), CGM.getHLSLRuntime().getFracIntrinsic(), |
| ArrayRef<Value *>{Op0}, nullptr, "hlsl.frac"); |
| } |
| case Builtin::BI__builtin_hlsl_elementwise_isinf: { |
| Value *Op0 = EmitScalarExpr(E->getArg(0)); |
| llvm::Type *Xty = Op0->getType(); |
| llvm::Type *retType = llvm::Type::getInt1Ty(this->getLLVMContext()); |
| if (Xty->isVectorTy()) { |
| auto *XVecTy = E->getArg(0)->getType()->castAs<VectorType>(); |
| retType = llvm::VectorType::get( |
| retType, ElementCount::getFixed(XVecTy->getNumElements())); |
| } |
| if (!E->getArg(0)->getType()->hasFloatingRepresentation()) |
| llvm_unreachable("isinf operand must have a float representation"); |
| return Builder.CreateIntrinsic( |
| retType, CGM.getHLSLRuntime().getIsInfIntrinsic(), |
| ArrayRef<Value *>{Op0}, nullptr, "hlsl.isinf"); |
| } |
| case Builtin::BI__builtin_hlsl_elementwise_isnan: { |
| Value *Op0 = EmitScalarExpr(E->getArg(0)); |
| llvm::Type *Xty = Op0->getType(); |
| llvm::Type *retType = llvm::Type::getInt1Ty(this->getLLVMContext()); |
| if (Xty->isVectorTy()) { |
| auto *XVecTy = E->getArg(0)->getType()->castAs<VectorType>(); |
| retType = llvm::VectorType::get( |
| retType, ElementCount::getFixed(XVecTy->getNumElements())); |
| } |
| if (!E->getArg(0)->getType()->hasFloatingRepresentation()) |
| llvm_unreachable("isnan operand must have a float representation"); |
| return Builder.CreateIntrinsic( |
| retType, CGM.getHLSLRuntime().getIsNaNIntrinsic(), |
| ArrayRef<Value *>{Op0}, nullptr, "hlsl.isnan"); |
| } |
| case Builtin::BI__builtin_hlsl_mad: { |
| Value *M = EmitScalarExpr(E->getArg(0)); |
| Value *A = EmitScalarExpr(E->getArg(1)); |
| Value *B = EmitScalarExpr(E->getArg(2)); |
| if (E->getArg(0)->getType()->hasFloatingRepresentation()) |
| return Builder.CreateIntrinsic( |
| /*ReturnType*/ M->getType(), Intrinsic::fmuladd, |
| ArrayRef<Value *>{M, A, B}, nullptr, "hlsl.fmad"); |
| |
| if (E->getArg(0)->getType()->hasSignedIntegerRepresentation()) { |
| if (CGM.getTarget().getTriple().getArch() == llvm::Triple::dxil) |
| return Builder.CreateIntrinsic( |
| /*ReturnType*/ M->getType(), Intrinsic::dx_imad, |
| ArrayRef<Value *>{M, A, B}, nullptr, "dx.imad"); |
| |
| Value *Mul = Builder.CreateNSWMul(M, A); |
| return Builder.CreateNSWAdd(Mul, B); |
| } |
| assert(E->getArg(0)->getType()->hasUnsignedIntegerRepresentation()); |
| if (CGM.getTarget().getTriple().getArch() == llvm::Triple::dxil) |
| return Builder.CreateIntrinsic( |
| /*ReturnType=*/M->getType(), Intrinsic::dx_umad, |
| ArrayRef<Value *>{M, A, B}, nullptr, "dx.umad"); |
| |
| Value *Mul = Builder.CreateNUWMul(M, A); |
| return Builder.CreateNUWAdd(Mul, B); |
| } |
| case Builtin::BI__builtin_hlsl_elementwise_rcp: { |
| Value *Op0 = EmitScalarExpr(E->getArg(0)); |
| if (!E->getArg(0)->getType()->hasFloatingRepresentation()) |
| llvm_unreachable("rcp operand must have a float representation"); |
| llvm::Type *Ty = Op0->getType(); |
| llvm::Type *EltTy = Ty->getScalarType(); |
| Constant *One = Ty->isVectorTy() |
| ? ConstantVector::getSplat( |
| ElementCount::getFixed( |
| cast<FixedVectorType>(Ty)->getNumElements()), |
| ConstantFP::get(EltTy, 1.0)) |
| : ConstantFP::get(EltTy, 1.0); |
| return Builder.CreateFDiv(One, Op0, "hlsl.rcp"); |
| } |
| case Builtin::BI__builtin_hlsl_elementwise_rsqrt: { |
| Value *Op0 = EmitScalarExpr(E->getArg(0)); |
| if (!E->getArg(0)->getType()->hasFloatingRepresentation()) |
| llvm_unreachable("rsqrt operand must have a float representation"); |
| return Builder.CreateIntrinsic( |
| /*ReturnType=*/Op0->getType(), CGM.getHLSLRuntime().getRsqrtIntrinsic(), |
| ArrayRef<Value *>{Op0}, nullptr, "hlsl.rsqrt"); |
| } |
| case Builtin::BI__builtin_hlsl_elementwise_saturate: { |
| Value *Op0 = EmitScalarExpr(E->getArg(0)); |
| assert(E->getArg(0)->getType()->hasFloatingRepresentation() && |
| "saturate operand must have a float representation"); |
| return Builder.CreateIntrinsic( |
| /*ReturnType=*/Op0->getType(), |
| CGM.getHLSLRuntime().getSaturateIntrinsic(), ArrayRef<Value *>{Op0}, |
| nullptr, "hlsl.saturate"); |
| } |
| case Builtin::BI__builtin_hlsl_select: { |
| Value *OpCond = EmitScalarExpr(E->getArg(0)); |
| RValue RValTrue = EmitAnyExpr(E->getArg(1)); |
| Value *OpTrue = |
| RValTrue.isScalar() |
| ? RValTrue.getScalarVal() |
| : Builder.CreateLoad(RValTrue.getAggregateAddress(), "true_val"); |
| RValue RValFalse = EmitAnyExpr(E->getArg(2)); |
| Value *OpFalse = |
| RValFalse.isScalar() |
| ? RValFalse.getScalarVal() |
| : Builder.CreateLoad(RValFalse.getAggregateAddress(), "false_val"); |
| if (auto *VTy = E->getType()->getAs<VectorType>()) { |
| if (!OpTrue->getType()->isVectorTy()) |
| OpTrue = |
| Builder.CreateVectorSplat(VTy->getNumElements(), OpTrue, "splat"); |
| if (!OpFalse->getType()->isVectorTy()) |
| OpFalse = |
| Builder.CreateVectorSplat(VTy->getNumElements(), OpFalse, "splat"); |
| } |
| |
| Value *SelectVal = |
| Builder.CreateSelect(OpCond, OpTrue, OpFalse, "hlsl.select"); |
| if (!RValTrue.isScalar()) |
| Builder.CreateStore(SelectVal, ReturnValue.getAddress(), |
| ReturnValue.isVolatile()); |
| |
| return SelectVal; |
| } |
| case Builtin::BI__builtin_hlsl_step: { |
| Value *Op0 = EmitScalarExpr(E->getArg(0)); |
| Value *Op1 = EmitScalarExpr(E->getArg(1)); |
| assert(E->getArg(0)->getType()->hasFloatingRepresentation() && |
| E->getArg(1)->getType()->hasFloatingRepresentation() && |
| "step operands must have a float representation"); |
| return Builder.CreateIntrinsic( |
| /*ReturnType=*/Op0->getType(), CGM.getHLSLRuntime().getStepIntrinsic(), |
| ArrayRef<Value *>{Op0, Op1}, nullptr, "hlsl.step"); |
| } |
| case Builtin::BI__builtin_hlsl_wave_active_all_true: { |
| Value *Op = EmitScalarExpr(E->getArg(0)); |
| assert(Op->getType()->isIntegerTy(1) && |
| "Intrinsic WaveActiveAllTrue operand must be a bool"); |
| |
| Intrinsic::ID ID = CGM.getHLSLRuntime().getWaveActiveAllTrueIntrinsic(); |
| return EmitRuntimeCall( |
| Intrinsic::getOrInsertDeclaration(&CGM.getModule(), ID), {Op}); |
| } |
| case Builtin::BI__builtin_hlsl_wave_active_any_true: { |
| Value *Op = EmitScalarExpr(E->getArg(0)); |
| assert(Op->getType()->isIntegerTy(1) && |
| "Intrinsic WaveActiveAnyTrue operand must be a bool"); |
| |
| Intrinsic::ID ID = CGM.getHLSLRuntime().getWaveActiveAnyTrueIntrinsic(); |
| return EmitRuntimeCall( |
| Intrinsic::getOrInsertDeclaration(&CGM.getModule(), ID), {Op}); |
| } |
| case Builtin::BI__builtin_hlsl_wave_active_count_bits: { |
| Value *OpExpr = EmitScalarExpr(E->getArg(0)); |
| Intrinsic::ID ID = CGM.getHLSLRuntime().getWaveActiveCountBitsIntrinsic(); |
| return EmitRuntimeCall( |
| Intrinsic::getOrInsertDeclaration(&CGM.getModule(), ID), |
| ArrayRef{OpExpr}); |
| } |
| case Builtin::BI__builtin_hlsl_wave_active_sum: { |
| // Due to the use of variadic arguments, explicitly retreive argument |
| Value *OpExpr = EmitScalarExpr(E->getArg(0)); |
| Intrinsic::ID IID = getWaveActiveSumIntrinsic( |
| getTarget().getTriple().getArch(), CGM.getHLSLRuntime(), |
| E->getArg(0)->getType()); |
| |
| return EmitRuntimeCall(Intrinsic::getOrInsertDeclaration( |
| &CGM.getModule(), IID, {OpExpr->getType()}), |
| ArrayRef{OpExpr}, "hlsl.wave.active.sum"); |
| } |
| case Builtin::BI__builtin_hlsl_wave_active_max: { |
| // Due to the use of variadic arguments, explicitly retreive argument |
| Value *OpExpr = EmitScalarExpr(E->getArg(0)); |
| Intrinsic::ID IID = getWaveActiveMaxIntrinsic( |
| getTarget().getTriple().getArch(), CGM.getHLSLRuntime(), |
| E->getArg(0)->getType()); |
| |
| return EmitRuntimeCall(Intrinsic::getOrInsertDeclaration( |
| &CGM.getModule(), IID, {OpExpr->getType()}), |
| ArrayRef{OpExpr}, "hlsl.wave.active.max"); |
| } |
| case Builtin::BI__builtin_hlsl_wave_active_min: { |
| // Due to the use of variadic arguments, explicitly retreive argument |
| Value *OpExpr = EmitScalarExpr(E->getArg(0)); |
| Intrinsic::ID IID = getWaveActiveMinIntrinsic( |
| getTarget().getTriple().getArch(), CGM.getHLSLRuntime(), |
| E->getArg(0)->getType()); |
| |
| return EmitRuntimeCall(Intrinsic::getOrInsertDeclaration( |
| &CGM.getModule(), IID, {OpExpr->getType()}), |
| ArrayRef{OpExpr}, "hlsl.wave.active.min"); |
| } |
| case Builtin::BI__builtin_hlsl_wave_get_lane_index: { |
| // We don't define a SPIR-V intrinsic, instead it is a SPIR-V built-in |
| // defined in SPIRVBuiltins.td. So instead we manually get the matching name |
| // for the DirectX intrinsic and the demangled builtin name |
| switch (CGM.getTarget().getTriple().getArch()) { |
| case llvm::Triple::dxil: |
| return EmitRuntimeCall(Intrinsic::getOrInsertDeclaration( |
| &CGM.getModule(), Intrinsic::dx_wave_getlaneindex)); |
| case llvm::Triple::spirv: |
| return EmitRuntimeCall(CGM.CreateRuntimeFunction( |
| llvm::FunctionType::get(IntTy, {}, false), |
| "__hlsl_wave_get_lane_index", {}, false, true)); |
| default: |
| llvm_unreachable( |
| "Intrinsic WaveGetLaneIndex not supported by target architecture"); |
| } |
| } |
| case Builtin::BI__builtin_hlsl_wave_is_first_lane: { |
| Intrinsic::ID ID = CGM.getHLSLRuntime().getWaveIsFirstLaneIntrinsic(); |
| return EmitRuntimeCall( |
| Intrinsic::getOrInsertDeclaration(&CGM.getModule(), ID)); |
| } |
| case Builtin::BI__builtin_hlsl_wave_get_lane_count: { |
| Intrinsic::ID ID = CGM.getHLSLRuntime().getWaveGetLaneCountIntrinsic(); |
| return EmitRuntimeCall( |
| Intrinsic::getOrInsertDeclaration(&CGM.getModule(), ID)); |
| } |
| case Builtin::BI__builtin_hlsl_wave_read_lane_at: { |
| // Due to the use of variadic arguments we must explicitly retreive them and |
| // create our function type. |
| Value *OpExpr = EmitScalarExpr(E->getArg(0)); |
| Value *OpIndex = EmitScalarExpr(E->getArg(1)); |
| return EmitRuntimeCall( |
| Intrinsic::getOrInsertDeclaration( |
| &CGM.getModule(), CGM.getHLSLRuntime().getWaveReadLaneAtIntrinsic(), |
| {OpExpr->getType()}), |
| ArrayRef{OpExpr, OpIndex}, "hlsl.wave.readlane"); |
| } |
| case Builtin::BI__builtin_hlsl_elementwise_sign: { |
| auto *Arg0 = E->getArg(0); |
| Value *Op0 = EmitScalarExpr(Arg0); |
| llvm::Type *Xty = Op0->getType(); |
| llvm::Type *retType = llvm::Type::getInt32Ty(this->getLLVMContext()); |
| if (Xty->isVectorTy()) { |
| auto *XVecTy = Arg0->getType()->castAs<VectorType>(); |
| retType = llvm::VectorType::get( |
| retType, ElementCount::getFixed(XVecTy->getNumElements())); |
| } |
| assert((Arg0->getType()->hasFloatingRepresentation() || |
| Arg0->getType()->hasIntegerRepresentation()) && |
| "sign operand must have a float or int representation"); |
| |
| if (Arg0->getType()->hasUnsignedIntegerRepresentation()) { |
| Value *Cmp = Builder.CreateICmpEQ(Op0, ConstantInt::get(Xty, 0)); |
| return Builder.CreateSelect(Cmp, ConstantInt::get(retType, 0), |
| ConstantInt::get(retType, 1), "hlsl.sign"); |
| } |
| |
| return Builder.CreateIntrinsic( |
| retType, CGM.getHLSLRuntime().getSignIntrinsic(), |
| ArrayRef<Value *>{Op0}, nullptr, "hlsl.sign"); |
| } |
| case Builtin::BI__builtin_hlsl_elementwise_radians: { |
| Value *Op0 = EmitScalarExpr(E->getArg(0)); |
| assert(E->getArg(0)->getType()->hasFloatingRepresentation() && |
| "radians operand must have a float representation"); |
| return Builder.CreateIntrinsic( |
| /*ReturnType=*/Op0->getType(), |
| CGM.getHLSLRuntime().getRadiansIntrinsic(), ArrayRef<Value *>{Op0}, |
| nullptr, "hlsl.radians"); |
| } |
| case Builtin::BI__builtin_hlsl_buffer_update_counter: { |
| Value *ResHandle = EmitScalarExpr(E->getArg(0)); |
| Value *Offset = EmitScalarExpr(E->getArg(1)); |
| Value *OffsetI8 = Builder.CreateIntCast(Offset, Int8Ty, true); |
| return Builder.CreateIntrinsic( |
| /*ReturnType=*/Offset->getType(), |
| CGM.getHLSLRuntime().getBufferUpdateCounterIntrinsic(), |
| ArrayRef<Value *>{ResHandle, OffsetI8}, nullptr); |
| } |
| case Builtin::BI__builtin_hlsl_elementwise_splitdouble: { |
| |
| assert((E->getArg(0)->getType()->hasFloatingRepresentation() && |
| E->getArg(1)->getType()->hasUnsignedIntegerRepresentation() && |
| E->getArg(2)->getType()->hasUnsignedIntegerRepresentation()) && |
| "asuint operands types mismatch"); |
| return handleHlslSplitdouble(E, this); |
| } |
| case Builtin::BI__builtin_hlsl_elementwise_clip: |
| assert(E->getArg(0)->getType()->hasFloatingRepresentation() && |
| "clip operands types mismatch"); |
| return handleHlslClip(E, this); |
| case Builtin::BI__builtin_hlsl_group_memory_barrier_with_group_sync: { |
| Intrinsic::ID ID = |
| CGM.getHLSLRuntime().getGroupMemoryBarrierWithGroupSyncIntrinsic(); |
| return EmitRuntimeCall( |
| Intrinsic::getOrInsertDeclaration(&CGM.getModule(), ID)); |
| } |
| case Builtin::BI__builtin_get_spirv_spec_constant_bool: |
| case Builtin::BI__builtin_get_spirv_spec_constant_short: |
| case Builtin::BI__builtin_get_spirv_spec_constant_ushort: |
| case Builtin::BI__builtin_get_spirv_spec_constant_int: |
| case Builtin::BI__builtin_get_spirv_spec_constant_uint: |
| case Builtin::BI__builtin_get_spirv_spec_constant_longlong: |
| case Builtin::BI__builtin_get_spirv_spec_constant_ulonglong: |
| case Builtin::BI__builtin_get_spirv_spec_constant_half: |
| case Builtin::BI__builtin_get_spirv_spec_constant_float: |
| case Builtin::BI__builtin_get_spirv_spec_constant_double: { |
| llvm::Function *SpecConstantFn = getSpecConstantFunction(E->getType()); |
| llvm::Value *SpecId = EmitScalarExpr(E->getArg(0)); |
| llvm::Value *DefaultVal = EmitScalarExpr(E->getArg(1)); |
| llvm::Value *Args[] = {SpecId, DefaultVal}; |
| return Builder.CreateCall(SpecConstantFn, Args); |
| } |
| } |
| return nullptr; |
| } |
| |
| llvm::Function *clang::CodeGen::CodeGenFunction::getSpecConstantFunction( |
| const clang::QualType &SpecConstantType) { |
| |
| // Find or create the declaration for the function. |
| llvm::Module *M = &CGM.getModule(); |
| std::string MangledName = |
| getSpecConstantFunctionName(SpecConstantType, getContext()); |
| llvm::Function *SpecConstantFn = M->getFunction(MangledName); |
| |
| if (!SpecConstantFn) { |
| llvm::Type *IntType = ConvertType(getContext().IntTy); |
| llvm::Type *RetTy = ConvertType(SpecConstantType); |
| llvm::Type *ArgTypes[] = {IntType, RetTy}; |
| llvm::FunctionType *FnTy = llvm::FunctionType::get(RetTy, ArgTypes, false); |
| SpecConstantFn = llvm::Function::Create( |
| FnTy, llvm::GlobalValue::ExternalLinkage, MangledName, M); |
| } |
| return SpecConstantFn; |
| } |
