| //======-- llvm/Support/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 values rather than constants. The values do not have names, |
| // even if names were provided to IRBuilder, which may be confusing. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_SUPPORT_NOFOLDER_H |
| #define LLVM_SUPPORT_NOFOLDER_H |
| |
| #include "llvm/Constants.h" |
| #include "llvm/Instructions.h" |
| |
| namespace llvm { |
| |
| /// NoFolder - Create "constants" (actually, values) with no folding. |
| class NoFolder { |
| public: |
| |
| //===--------------------------------------------------------------------===// |
| // Binary Operators |
| //===--------------------------------------------------------------------===// |
| |
| Value *CreateAdd(Constant *LHS, Constant *RHS) const { |
| return BinaryOperator::CreateAdd(LHS, RHS); |
| } |
| Value *CreateSub(Constant *LHS, Constant *RHS) const { |
| return BinaryOperator::CreateSub(LHS, RHS); |
| } |
| Value *CreateMul(Constant *LHS, Constant *RHS) const { |
| return BinaryOperator::CreateMul(LHS, RHS); |
| } |
| Value *CreateUDiv(Constant *LHS, Constant *RHS) const { |
| return BinaryOperator::CreateUDiv(LHS, RHS); |
| } |
| Value *CreateSDiv(Constant *LHS, Constant *RHS) const { |
| return BinaryOperator::CreateSDiv(LHS, RHS); |
| } |
| Value *CreateFDiv(Constant *LHS, Constant *RHS) const { |
| return BinaryOperator::CreateFDiv(LHS, RHS); |
| } |
| Value *CreateURem(Constant *LHS, Constant *RHS) const { |
| return BinaryOperator::CreateURem(LHS, RHS); |
| } |
| Value *CreateSRem(Constant *LHS, Constant *RHS) const { |
| return BinaryOperator::CreateSRem(LHS, RHS); |
| } |
| Value *CreateFRem(Constant *LHS, Constant *RHS) const { |
| return BinaryOperator::CreateFRem(LHS, RHS); |
| } |
| Value *CreateShl(Constant *LHS, Constant *RHS) const { |
| return BinaryOperator::CreateShl(LHS, RHS); |
| } |
| Value *CreateLShr(Constant *LHS, Constant *RHS) const { |
| return BinaryOperator::CreateLShr(LHS, RHS); |
| } |
| Value *CreateAShr(Constant *LHS, Constant *RHS) const { |
| return BinaryOperator::CreateAShr(LHS, RHS); |
| } |
| Value *CreateAnd(Constant *LHS, Constant *RHS) const { |
| return BinaryOperator::CreateAnd(LHS, RHS); |
| } |
| Value *CreateOr(Constant *LHS, Constant *RHS) const { |
| return BinaryOperator::CreateOr(LHS, RHS); |
| } |
| Value *CreateXor(Constant *LHS, Constant *RHS) const { |
| return BinaryOperator::CreateXor(LHS, RHS); |
| } |
| |
| Value *CreateBinOp(Instruction::BinaryOps Opc, |
| Constant *LHS, Constant *RHS) const { |
| return BinaryOperator::Create(Opc, LHS, RHS); |
| } |
| |
| //===--------------------------------------------------------------------===// |
| // Unary Operators |
| //===--------------------------------------------------------------------===// |
| |
| Value *CreateNeg(Constant *C) const { |
| return BinaryOperator::CreateNeg(C); |
| } |
| Value *CreateNot(Constant *C) const { |
| return BinaryOperator::CreateNot(C); |
| } |
| |
| //===--------------------------------------------------------------------===// |
| // Memory Instructions |
| //===--------------------------------------------------------------------===// |
| |
| Constant *CreateGetElementPtr(Constant *C, Constant* const *IdxList, |
| unsigned NumIdx) const { |
| return ConstantExpr::getGetElementPtr(C, IdxList, NumIdx); |
| } |
| Value *CreateGetElementPtr(Constant *C, Value* const *IdxList, |
| unsigned NumIdx) const { |
| return GetElementPtrInst::Create(C, IdxList, IdxList+NumIdx); |
| } |
| |
| //===--------------------------------------------------------------------===// |
| // Cast/Conversion Operators |
| //===--------------------------------------------------------------------===// |
| |
| Value *CreateCast(Instruction::CastOps Op, Constant *C, |
| const Type *DestTy) const { |
| return CastInst::Create(Op, C, DestTy); |
| } |
| Value *CreateIntCast(Constant *C, const Type *DestTy, |
| bool isSigned) const { |
| return CastInst::CreateIntegerCast(C, DestTy, isSigned); |
| } |
| |
| //===--------------------------------------------------------------------===// |
| // Compare Instructions |
| //===--------------------------------------------------------------------===// |
| |
| Value *CreateICmp(CmpInst::Predicate P, Constant *LHS, Constant *RHS) const { |
| return new ICmpInst(P, LHS, RHS); |
| } |
| Value *CreateFCmp(CmpInst::Predicate P, Constant *LHS, Constant *RHS) const { |
| return new FCmpInst(P, LHS, RHS); |
| } |
| Value *CreateVICmp(CmpInst::Predicate P, Constant *LHS, Constant *RHS) const { |
| return new VICmpInst(P, LHS, RHS); |
| } |
| Value *CreateVFCmp(CmpInst::Predicate P, Constant *LHS, Constant *RHS) const { |
| return new VFCmpInst(P, LHS, RHS); |
| } |
| |
| //===--------------------------------------------------------------------===// |
| // Other Instructions |
| //===--------------------------------------------------------------------===// |
| |
| Value *CreateSelect(Constant *C, Constant *True, Constant *False) const { |
| return SelectInst::Create(C, True, False); |
| } |
| |
| Value *CreateExtractElement(Constant *Vec, Constant *Idx) const { |
| return new ExtractElementInst(Vec, Idx); |
| } |
| |
| Value *CreateInsertElement(Constant *Vec, Constant *NewElt, |
| Constant *Idx) const { |
| return InsertElementInst::Create(Vec, NewElt, Idx); |
| } |
| |
| Value *CreateShuffleVector(Constant *V1, Constant *V2, Constant *Mask) const { |
| return new ShuffleVectorInst(V1, V2, Mask); |
| } |
| |
| Value *CreateExtractValue(Constant *Agg, const unsigned *IdxList, |
| unsigned NumIdx) const { |
| return ExtractValueInst::Create(Agg, IdxList, IdxList+NumIdx); |
| } |
| |
| Value *CreateInsertValue(Constant *Agg, Constant *Val, |
| const unsigned *IdxList, unsigned NumIdx) const { |
| return InsertValueInst::Create(Agg, Val, IdxList, IdxList+NumIdx); |
| } |
| }; |
| |
| } |
| |
| #endif |