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//======-- 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 {
LLVMContext &Context;
public:
NoFolder(LLVMContext &C) : Context(C) { }
//===--------------------------------------------------------------------===//
// Binary Operators
//===--------------------------------------------------------------------===//
Value *CreateAdd(Constant *LHS, Constant *RHS) const {
return BinaryOperator::CreateAdd(LHS, RHS);
}
Value *CreateFAdd(Constant *LHS, Constant *RHS) const {
return BinaryOperator::CreateFAdd(LHS, RHS);
}
Value *CreateSub(Constant *LHS, Constant *RHS) const {
return BinaryOperator::CreateSub(LHS, RHS);
}
Value *CreateFSub(Constant *LHS, Constant *RHS) const {
return BinaryOperator::CreateFSub(LHS, RHS);
}
Value *CreateMul(Constant *LHS, Constant *RHS) const {
return BinaryOperator::CreateMul(LHS, RHS);
}
Value *CreateFMul(Constant *LHS, Constant *RHS) const {
return BinaryOperator::CreateFMul(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);
}
//===--------------------------------------------------------------------===//
// 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
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