1 //======-- llvm/Support/NoFolder.h - Constant folding helper -*- C++ -*-======//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the NoFolder class, a helper for IRBuilder. It provides
11 // IRBuilder with a set of methods for creating unfolded constants. This is
12 // useful for learners trying to understand how LLVM IR works, and who don't
13 // want details to be hidden by the constant folder. For general constant
14 // creation and folding, use ConstantExpr and the routines in
15 // llvm/Analysis/ConstantFolding.h.
17 // Note: since it is not actually possible to create unfolded constants, this
18 // class returns values rather than constants. The values do not have names,
19 // even if names were provided to IRBuilder, which may be confusing.
21 //===----------------------------------------------------------------------===//
23 #ifndef LLVM_SUPPORT_NULLFOLDER_H
24 #define LLVM_SUPPORT_NULLFOLDER_H
26 #include "llvm/Constants.h"
27 #include "llvm/Instructions.h"
31 /// NoFolder - Create "constants" (actually, values) with no folding.
35 //===--------------------------------------------------------------------===//
37 //===--------------------------------------------------------------------===//
39 Value *CreateAdd(Constant *LHS, Constant *RHS) const {
40 return BinaryOperator::CreateAdd(LHS, RHS);
42 Value *CreateSub(Constant *LHS, Constant *RHS) const {
43 return BinaryOperator::CreateSub(LHS, RHS);
45 Value *CreateMul(Constant *LHS, Constant *RHS) const {
46 return BinaryOperator::CreateMul(LHS, RHS);
48 Value *CreateUDiv(Constant *LHS, Constant *RHS) const {
49 return BinaryOperator::CreateUDiv(LHS, RHS);
51 Value *CreateSDiv(Constant *LHS, Constant *RHS) const {
52 return BinaryOperator::CreateSDiv(LHS, RHS);
54 Value *CreateFDiv(Constant *LHS, Constant *RHS) const {
55 return BinaryOperator::CreateFDiv(LHS, RHS);
57 Value *CreateURem(Constant *LHS, Constant *RHS) const {
58 return BinaryOperator::CreateURem(LHS, RHS);
60 Value *CreateSRem(Constant *LHS, Constant *RHS) const {
61 return BinaryOperator::CreateSRem(LHS, RHS);
63 Value *CreateFRem(Constant *LHS, Constant *RHS) const {
64 return BinaryOperator::CreateFRem(LHS, RHS);
66 Value *CreateShl(Constant *LHS, Constant *RHS) const {
67 return BinaryOperator::CreateShl(LHS, RHS);
69 Value *CreateLShr(Constant *LHS, Constant *RHS) const {
70 return BinaryOperator::CreateLShr(LHS, RHS);
72 Value *CreateAShr(Constant *LHS, Constant *RHS) const {
73 return BinaryOperator::CreateAShr(LHS, RHS);
75 Value *CreateAnd(Constant *LHS, Constant *RHS) const {
76 return BinaryOperator::CreateAnd(LHS, RHS);
78 Value *CreateOr(Constant *LHS, Constant *RHS) const {
79 return BinaryOperator::CreateOr(LHS, RHS);
81 Value *CreateXor(Constant *LHS, Constant *RHS) const {
82 return BinaryOperator::CreateXor(LHS, RHS);
85 Value *CreateBinOp(Instruction::BinaryOps Opc,
86 Constant *LHS, Constant *RHS) const {
87 return BinaryOperator::Create(Opc, LHS, RHS);
90 //===--------------------------------------------------------------------===//
92 //===--------------------------------------------------------------------===//
94 Value *CreateNeg(Constant *C) const {
95 return BinaryOperator::CreateNeg(C);
97 Value *CreateNot(Constant *C) const {
98 return BinaryOperator::CreateNot(C);
101 //===--------------------------------------------------------------------===//
102 // Memory Instructions
103 //===--------------------------------------------------------------------===//
105 Constant *CreateGetElementPtr(Constant *C, Constant* const *IdxList,
106 unsigned NumIdx) const {
107 return ConstantExpr::getGetElementPtr(C, IdxList, NumIdx);
109 Value *CreateGetElementPtr(Constant *C, Value* const *IdxList,
110 unsigned NumIdx) const {
111 return GetElementPtrInst::Create(C, IdxList, IdxList+NumIdx);
114 //===--------------------------------------------------------------------===//
115 // Cast/Conversion Operators
116 //===--------------------------------------------------------------------===//
118 Value *CreateCast(Instruction::CastOps Op, Constant *C,
119 const Type *DestTy) const {
120 return CastInst::Create(Op, C, DestTy);
122 Value *CreateIntCast(Constant *C, const Type *DestTy,
123 bool isSigned) const {
124 return CastInst::CreateIntegerCast(C, DestTy, isSigned);
127 //===--------------------------------------------------------------------===//
128 // Compare Instructions
129 //===--------------------------------------------------------------------===//
131 Value *CreateICmp(CmpInst::Predicate P, Constant *LHS, Constant *RHS) const {
132 return new ICmpInst(P, LHS, RHS);
134 Value *CreateFCmp(CmpInst::Predicate P, Constant *LHS, Constant *RHS) const {
135 return new FCmpInst(P, LHS, RHS);
137 Value *CreateVICmp(CmpInst::Predicate P, Constant *LHS, Constant *RHS) const {
138 return new VICmpInst(P, LHS, RHS);
140 Value *CreateVFCmp(CmpInst::Predicate P, Constant *LHS, Constant *RHS) const {
141 return new VFCmpInst(P, LHS, RHS);
144 //===--------------------------------------------------------------------===//
145 // Other Instructions
146 //===--------------------------------------------------------------------===//
148 Value *CreateSelect(Constant *C, Constant *True, Constant *False) const {
149 return SelectInst::Create(C, True, False);
152 Value *CreateExtractElement(Constant *Vec, Constant *Idx) const {
153 return new ExtractElementInst(Vec, Idx);
156 Value *CreateInsertElement(Constant *Vec, Constant *NewElt,
157 Constant *Idx) const {
158 return InsertElementInst::Create(Vec, NewElt, Idx);
161 Value *CreateShuffleVector(Constant *V1, Constant *V2, Constant *Mask) const {
162 return new ShuffleVectorInst(V1, V2, Mask);
165 Value *CreateExtractValue(Constant *Agg, const unsigned *IdxList,
166 unsigned NumIdx) const {
167 return ExtractValueInst::Create(Agg, IdxList, IdxList+NumIdx);
170 Value *CreateInsertValue(Constant *Agg, Constant *Val,
171 const unsigned *IdxList, unsigned NumIdx) const {
172 return InsertValueInst::Create(Agg, Val, IdxList, IdxList+NumIdx);