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Diffstat (limited to 'include/llvm/IR/NoFolder.h')
| -rw-r--r-- | include/llvm/IR/NoFolder.h | 298 |
1 files changed, 298 insertions, 0 deletions
diff --git a/include/llvm/IR/NoFolder.h b/include/llvm/IR/NoFolder.h new file mode 100644 index 0000000..a9cdfc3 --- /dev/null +++ b/include/llvm/IR/NoFolder.h @@ -0,0 +1,298 @@ +//===- NoFolder.h - Constant folding helper ---------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file defines the NoFolder class, a helper for IRBuilder. It provides +// IRBuilder with a set of methods for creating unfolded constants. This is +// useful for learners trying to understand how LLVM IR works, and who don't +// want details to be hidden by the constant folder. For general constant +// creation and folding, use ConstantExpr and the routines in +// llvm/Analysis/ConstantFolding.h. +// +// Note: since it is not actually possible to create unfolded constants, this +// class returns instructions rather than constants. +// +//===----------------------------------------------------------------------===// + +#ifndef LLVM_IR_NOFOLDER_H +#define LLVM_IR_NOFOLDER_H + +#include "llvm/ADT/ArrayRef.h" +#include "llvm/IR/Constants.h" +#include "llvm/IR/Instructions.h" + +namespace llvm { + +/// NoFolder - Create "constants" (actually, instructions) with no folding. +class NoFolder { +public: + explicit NoFolder() {} + + //===--------------------------------------------------------------------===// + // Binary Operators + //===--------------------------------------------------------------------===// + + Instruction *CreateAdd(Constant *LHS, Constant *RHS, + bool HasNUW = false, bool HasNSW = false) const { + BinaryOperator *BO = BinaryOperator::CreateAdd(LHS, RHS); + if (HasNUW) BO->setHasNoUnsignedWrap(); + if (HasNSW) BO->setHasNoSignedWrap(); + return BO; + } + Instruction *CreateNSWAdd(Constant *LHS, Constant *RHS) const { + return BinaryOperator::CreateNSWAdd(LHS, RHS); + } + Instruction *CreateNUWAdd(Constant *LHS, Constant *RHS) const { + return BinaryOperator::CreateNUWAdd(LHS, RHS); + } + Instruction *CreateFAdd(Constant *LHS, Constant *RHS) const { + return BinaryOperator::CreateFAdd(LHS, RHS); + } + Instruction *CreateSub(Constant *LHS, Constant *RHS, + bool HasNUW = false, bool HasNSW = false) const { + BinaryOperator *BO = BinaryOperator::CreateSub(LHS, RHS); + if (HasNUW) BO->setHasNoUnsignedWrap(); + if (HasNSW) BO->setHasNoSignedWrap(); + return BO; + } + Instruction *CreateNSWSub(Constant *LHS, Constant *RHS) const { + return BinaryOperator::CreateNSWSub(LHS, RHS); + } + Instruction *CreateNUWSub(Constant *LHS, Constant *RHS) const { + return BinaryOperator::CreateNUWSub(LHS, RHS); + } + Instruction *CreateFSub(Constant *LHS, Constant *RHS) const { + return BinaryOperator::CreateFSub(LHS, RHS); + } + Instruction *CreateMul(Constant *LHS, Constant *RHS, + bool HasNUW = false, bool HasNSW = false) const { + BinaryOperator *BO = BinaryOperator::CreateMul(LHS, RHS); + if (HasNUW) BO->setHasNoUnsignedWrap(); + if (HasNSW) BO->setHasNoSignedWrap(); + return BO; + } + Instruction *CreateNSWMul(Constant *LHS, Constant *RHS) const { + return BinaryOperator::CreateNSWMul(LHS, RHS); + } + Instruction *CreateNUWMul(Constant *LHS, Constant *RHS) const { + return BinaryOperator::CreateNUWMul(LHS, RHS); + } + Instruction *CreateFMul(Constant *LHS, Constant *RHS) const { + return BinaryOperator::CreateFMul(LHS, RHS); + } + Instruction *CreateUDiv(Constant *LHS, Constant *RHS, + bool isExact = false) const { + if (!isExact) + return BinaryOperator::CreateUDiv(LHS, RHS); + return BinaryOperator::CreateExactUDiv(LHS, RHS); + } + Instruction *CreateExactUDiv(Constant *LHS, Constant *RHS) const { + return BinaryOperator::CreateExactUDiv(LHS, RHS); + } + Instruction *CreateSDiv(Constant *LHS, Constant *RHS, + bool isExact = false) const { + if (!isExact) + return BinaryOperator::CreateSDiv(LHS, RHS); + return BinaryOperator::CreateExactSDiv(LHS, RHS); + } + Instruction *CreateExactSDiv(Constant *LHS, Constant *RHS) const { + return BinaryOperator::CreateExactSDiv(LHS, RHS); + } + Instruction *CreateFDiv(Constant *LHS, Constant *RHS) const { + return BinaryOperator::CreateFDiv(LHS, RHS); + } + Instruction *CreateURem(Constant *LHS, Constant *RHS) const { + return BinaryOperator::CreateURem(LHS, RHS); + } + Instruction *CreateSRem(Constant *LHS, Constant *RHS) const { + return BinaryOperator::CreateSRem(LHS, RHS); + } + Instruction *CreateFRem(Constant *LHS, Constant *RHS) const { + return BinaryOperator::CreateFRem(LHS, RHS); + } + Instruction *CreateShl(Constant *LHS, Constant *RHS, bool HasNUW = false, + bool HasNSW = false) const { + BinaryOperator *BO = BinaryOperator::CreateShl(LHS, RHS); + if (HasNUW) BO->setHasNoUnsignedWrap(); + if (HasNSW) BO->setHasNoSignedWrap(); + return BO; + } + Instruction *CreateLShr(Constant *LHS, Constant *RHS, + bool isExact = false) const { + if (!isExact) + return BinaryOperator::CreateLShr(LHS, RHS); + return BinaryOperator::CreateExactLShr(LHS, RHS); + } + Instruction *CreateAShr(Constant *LHS, Constant *RHS, + bool isExact = false) const { + if (!isExact) + return BinaryOperator::CreateAShr(LHS, RHS); + return BinaryOperator::CreateExactAShr(LHS, RHS); + } + Instruction *CreateAnd(Constant *LHS, Constant *RHS) const { + return BinaryOperator::CreateAnd(LHS, RHS); + } + Instruction *CreateOr(Constant *LHS, Constant *RHS) const { + return BinaryOperator::CreateOr(LHS, RHS); + } + Instruction *CreateXor(Constant *LHS, Constant *RHS) const { + return BinaryOperator::CreateXor(LHS, RHS); + } + + Instruction *CreateBinOp(Instruction::BinaryOps Opc, + Constant *LHS, Constant *RHS) const { + return BinaryOperator::Create(Opc, LHS, RHS); + } + + //===--------------------------------------------------------------------===// + // Unary Operators + //===--------------------------------------------------------------------===// + + Instruction *CreateNeg(Constant *C, + bool HasNUW = false, bool HasNSW = false) const { + BinaryOperator *BO = BinaryOperator::CreateNeg(C); + if (HasNUW) BO->setHasNoUnsignedWrap(); + if (HasNSW) BO->setHasNoSignedWrap(); + return BO; + } + Instruction *CreateNSWNeg(Constant *C) const { + return BinaryOperator::CreateNSWNeg(C); + } + Instruction *CreateNUWNeg(Constant *C) const { + return BinaryOperator::CreateNUWNeg(C); + } + Instruction *CreateFNeg(Constant *C) const { + return BinaryOperator::CreateFNeg(C); + } + Instruction *CreateNot(Constant *C) const { + return BinaryOperator::CreateNot(C); + } + + //===--------------------------------------------------------------------===// + // Memory Instructions + //===--------------------------------------------------------------------===// + + Constant *CreateGetElementPtr(Constant *C, + ArrayRef<Constant *> IdxList) const { + return ConstantExpr::getGetElementPtr(C, IdxList); + } + Constant *CreateGetElementPtr(Constant *C, Constant *Idx) const { + // This form of the function only exists to avoid ambiguous overload + // warnings about whether to convert Idx to ArrayRef<Constant *> or + // ArrayRef<Value *>. + return ConstantExpr::getGetElementPtr(C, Idx); + } + Instruction *CreateGetElementPtr(Constant *C, + ArrayRef<Value *> IdxList) const { + return GetElementPtrInst::Create(C, IdxList); + } + + Constant *CreateInBoundsGetElementPtr(Constant *C, + ArrayRef<Constant *> IdxList) const { + return ConstantExpr::getInBoundsGetElementPtr(C, IdxList); + } + Constant *CreateInBoundsGetElementPtr(Constant *C, Constant *Idx) const { + // This form of the function only exists to avoid ambiguous overload + // warnings about whether to convert Idx to ArrayRef<Constant *> or + // ArrayRef<Value *>. + return ConstantExpr::getInBoundsGetElementPtr(C, Idx); + } + Instruction *CreateInBoundsGetElementPtr(Constant *C, + ArrayRef<Value *> IdxList) const { + return GetElementPtrInst::CreateInBounds(C, IdxList); + } + + //===--------------------------------------------------------------------===// + // Cast/Conversion Operators + //===--------------------------------------------------------------------===// + + Instruction *CreateCast(Instruction::CastOps Op, Constant *C, + Type *DestTy) const { + return CastInst::Create(Op, C, DestTy); + } + Instruction *CreatePointerCast(Constant *C, Type *DestTy) const { + return CastInst::CreatePointerCast(C, DestTy); + } + Instruction *CreateIntCast(Constant *C, Type *DestTy, + bool isSigned) const { + return CastInst::CreateIntegerCast(C, DestTy, isSigned); + } + Instruction *CreateFPCast(Constant *C, Type *DestTy) const { + return CastInst::CreateFPCast(C, DestTy); + } + + Instruction *CreateBitCast(Constant *C, Type *DestTy) const { + return CreateCast(Instruction::BitCast, C, DestTy); + } + Instruction *CreateIntToPtr(Constant *C, Type *DestTy) const { + return CreateCast(Instruction::IntToPtr, C, DestTy); + } + Instruction *CreatePtrToInt(Constant *C, Type *DestTy) const { + return CreateCast(Instruction::PtrToInt, C, DestTy); + } + Instruction *CreateZExtOrBitCast(Constant *C, Type *DestTy) const { + return CastInst::CreateZExtOrBitCast(C, DestTy); + } + Instruction *CreateSExtOrBitCast(Constant *C, Type *DestTy) const { + return CastInst::CreateSExtOrBitCast(C, DestTy); + } + + Instruction *CreateTruncOrBitCast(Constant *C, Type *DestTy) const { + return CastInst::CreateTruncOrBitCast(C, DestTy); + } + + //===--------------------------------------------------------------------===// + // Compare Instructions + //===--------------------------------------------------------------------===// + + Instruction *CreateICmp(CmpInst::Predicate P, + Constant *LHS, Constant *RHS) const { + return new ICmpInst(P, LHS, RHS); + } + Instruction *CreateFCmp(CmpInst::Predicate P, + Constant *LHS, Constant *RHS) const { + return new FCmpInst(P, LHS, RHS); + } + + //===--------------------------------------------------------------------===// + // Other Instructions + //===--------------------------------------------------------------------===// + + Instruction *CreateSelect(Constant *C, + Constant *True, Constant *False) const { + return SelectInst::Create(C, True, False); + } + + Instruction *CreateExtractElement(Constant *Vec, Constant *Idx) const { + return ExtractElementInst::Create(Vec, Idx); + } + + Instruction *CreateInsertElement(Constant *Vec, Constant *NewElt, + Constant *Idx) const { + return InsertElementInst::Create(Vec, NewElt, Idx); + } + + Instruction *CreateShuffleVector(Constant *V1, Constant *V2, + Constant *Mask) const { + return new ShuffleVectorInst(V1, V2, Mask); + } + + Instruction *CreateExtractValue(Constant *Agg, + ArrayRef<unsigned> IdxList) const { + return ExtractValueInst::Create(Agg, IdxList); + } + + Instruction *CreateInsertValue(Constant *Agg, Constant *Val, + ArrayRef<unsigned> IdxList) const { + return InsertValueInst::Create(Agg, Val, IdxList); + } +}; + +} + +#endif |