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_NOFOLDER_H
24 #define LLVM_SUPPORT_NOFOLDER_H
26 #include "llvm/Constants.h"
27 #include "llvm/Instructions.h"
33 /// NoFolder - Create "constants" (actually, values) with no folding.
36 explicit NoFolder(LLVMContext &) {}
38 //===--------------------------------------------------------------------===//
40 //===--------------------------------------------------------------------===//
42 Value *CreateAdd(Constant *LHS, Constant *RHS) const {
43 return BinaryOperator::CreateAdd(LHS, RHS);
45 Value *CreateNSWAdd(Constant *LHS, Constant *RHS) const {
46 return BinaryOperator::CreateNSWAdd(LHS, RHS);
48 Value *CreateFAdd(Constant *LHS, Constant *RHS) const {
49 return BinaryOperator::CreateFAdd(LHS, RHS);
51 Value *CreateSub(Constant *LHS, Constant *RHS) const {
52 return BinaryOperator::CreateSub(LHS, RHS);
54 Value *CreateNSWSub(Constant *LHS, Constant *RHS) const {
55 return BinaryOperator::CreateNSWSub(LHS, RHS);
57 Value *CreateFSub(Constant *LHS, Constant *RHS) const {
58 return BinaryOperator::CreateFSub(LHS, RHS);
60 Value *CreateMul(Constant *LHS, Constant *RHS) const {
61 return BinaryOperator::CreateMul(LHS, RHS);
63 Value *CreateFMul(Constant *LHS, Constant *RHS) const {
64 return BinaryOperator::CreateFMul(LHS, RHS);
66 Value *CreateUDiv(Constant *LHS, Constant *RHS) const {
67 return BinaryOperator::CreateUDiv(LHS, RHS);
69 Value *CreateSDiv(Constant *LHS, Constant *RHS) const {
70 return BinaryOperator::CreateSDiv(LHS, RHS);
72 Value *CreateExactSDiv(Constant *LHS, Constant *RHS) const {
73 return BinaryOperator::CreateExactSDiv(LHS, RHS);
75 Value *CreateFDiv(Constant *LHS, Constant *RHS) const {
76 return BinaryOperator::CreateFDiv(LHS, RHS);
78 Value *CreateURem(Constant *LHS, Constant *RHS) const {
79 return BinaryOperator::CreateURem(LHS, RHS);
81 Value *CreateSRem(Constant *LHS, Constant *RHS) const {
82 return BinaryOperator::CreateSRem(LHS, RHS);
84 Value *CreateFRem(Constant *LHS, Constant *RHS) const {
85 return BinaryOperator::CreateFRem(LHS, RHS);
87 Value *CreateShl(Constant *LHS, Constant *RHS) const {
88 return BinaryOperator::CreateShl(LHS, RHS);
90 Value *CreateLShr(Constant *LHS, Constant *RHS) const {
91 return BinaryOperator::CreateLShr(LHS, RHS);
93 Value *CreateAShr(Constant *LHS, Constant *RHS) const {
94 return BinaryOperator::CreateAShr(LHS, RHS);
96 Value *CreateAnd(Constant *LHS, Constant *RHS) const {
97 return BinaryOperator::CreateAnd(LHS, RHS);
99 Value *CreateOr(Constant *LHS, Constant *RHS) const {
100 return BinaryOperator::CreateOr(LHS, RHS);
102 Value *CreateXor(Constant *LHS, Constant *RHS) const {
103 return BinaryOperator::CreateXor(LHS, RHS);
106 Value *CreateBinOp(Instruction::BinaryOps Opc,
107 Constant *LHS, Constant *RHS) const {
108 return BinaryOperator::Create(Opc, LHS, RHS);
111 //===--------------------------------------------------------------------===//
113 //===--------------------------------------------------------------------===//
115 Value *CreateNeg(Constant *C) const {
116 return BinaryOperator::CreateNeg(C);
118 Value *CreateNSWNeg(Constant *C) const {
119 return BinaryOperator::CreateNSWNeg(C);
121 Value *CreateNot(Constant *C) const {
122 return BinaryOperator::CreateNot(C);
125 //===--------------------------------------------------------------------===//
126 // Memory Instructions
127 //===--------------------------------------------------------------------===//
129 Constant *CreateGetElementPtr(Constant *C, Constant* const *IdxList,
130 unsigned NumIdx) const {
131 return ConstantExpr::getGetElementPtr(C, IdxList, NumIdx);
133 Value *CreateGetElementPtr(Constant *C, Value* const *IdxList,
134 unsigned NumIdx) const {
135 return GetElementPtrInst::Create(C, IdxList, IdxList+NumIdx);
138 Constant *CreateInBoundsGetElementPtr(Constant *C, Constant* const *IdxList,
139 unsigned NumIdx) const {
140 return ConstantExpr::getInBoundsGetElementPtr(C, IdxList, NumIdx);
142 Value *CreateInBoundsGetElementPtr(Constant *C, Value* const *IdxList,
143 unsigned NumIdx) const {
144 return GetElementPtrInst::CreateInBounds(C, IdxList, IdxList+NumIdx);
147 //===--------------------------------------------------------------------===//
148 // Cast/Conversion Operators
149 //===--------------------------------------------------------------------===//
151 Value *CreateCast(Instruction::CastOps Op, Constant *C,
152 const Type *DestTy) const {
153 return CastInst::Create(Op, C, DestTy);
155 Value *CreateIntCast(Constant *C, const Type *DestTy,
156 bool isSigned) const {
157 return CastInst::CreateIntegerCast(C, DestTy, isSigned);
160 //===--------------------------------------------------------------------===//
161 // Compare Instructions
162 //===--------------------------------------------------------------------===//
164 Value *CreateICmp(CmpInst::Predicate P, Constant *LHS, Constant *RHS) const {
165 return new ICmpInst(P, LHS, RHS);
167 Value *CreateFCmp(CmpInst::Predicate P, Constant *LHS, Constant *RHS) const {
168 return new FCmpInst(P, LHS, RHS);
171 //===--------------------------------------------------------------------===//
172 // Other Instructions
173 //===--------------------------------------------------------------------===//
175 Value *CreateSelect(Constant *C, Constant *True, Constant *False) const {
176 return SelectInst::Create(C, True, False);
179 Value *CreateExtractElement(Constant *Vec, Constant *Idx) const {
180 return ExtractElementInst::Create(Vec, Idx);
183 Value *CreateInsertElement(Constant *Vec, Constant *NewElt,
184 Constant *Idx) const {
185 return InsertElementInst::Create(Vec, NewElt, Idx);
188 Value *CreateShuffleVector(Constant *V1, Constant *V2, Constant *Mask) const {
189 return new ShuffleVectorInst(V1, V2, Mask);
192 Value *CreateExtractValue(Constant *Agg, const unsigned *IdxList,
193 unsigned NumIdx) const {
194 return ExtractValueInst::Create(Agg, IdxList, IdxList+NumIdx);
197 Value *CreateInsertValue(Constant *Agg, Constant *Val,
198 const unsigned *IdxList, unsigned NumIdx) const {
199 return InsertValueInst::Create(Agg, Val, IdxList, IdxList+NumIdx);