ConstantFolder.h revision 411984810e4a66591123e1b16873e5f19ae18817 
1//===-- llvm/Support/ConstantFolder.h - Constant folding helper -*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file defines the ConstantFolder class, a helper for IRBuilder.
11// It provides IRBuilder with a set of methods for creating constants
12// with minimal folding.  For general constant creation and folding,
13// use ConstantExpr and the routines in llvm/Analysis/ConstantFolding.h.
14//
15//===----------------------------------------------------------------------===//
16
17#ifndef LLVM_SUPPORT_CONSTANTFOLDER_H
18#define LLVM_SUPPORT_CONSTANTFOLDER_H
19
20#include "llvm/Constants.h"
21#include "llvm/InstrTypes.h"
22
23namespace llvm {
24
25class LLVMContext;
26
27/// ConstantFolder - Create constants with minimum, target independent, folding.
28class ConstantFolder {
29public:
30  explicit ConstantFolder(LLVMContext &) {}
31
32  //===--------------------------------------------------------------------===//
33  // Binary Operators
34  //===--------------------------------------------------------------------===//
35
36  Constant *CreateAdd(Constant *LHS, Constant *RHS) const {
37    return ConstantExpr::getAdd(LHS, RHS);
38  }
39  Constant *CreateNSWAdd(Constant *LHS, Constant *RHS) const {
40    return ConstantExpr::getNSWAdd(LHS, RHS);
41  }
42  Constant *CreateFAdd(Constant *LHS, Constant *RHS) const {
43    return ConstantExpr::getFAdd(LHS, RHS);
44  }
45  Constant *CreateSub(Constant *LHS, Constant *RHS) const {
46    return ConstantExpr::getSub(LHS, RHS);
47  }
48  Constant *CreateNSWSub(Constant *LHS, Constant *RHS) const {
49    return ConstantExpr::getNSWSub(LHS, RHS);
50  }
51  Constant *CreateFSub(Constant *LHS, Constant *RHS) const {
52    return ConstantExpr::getFSub(LHS, RHS);
53  }
54  Constant *CreateMul(Constant *LHS, Constant *RHS) const {
55    return ConstantExpr::getMul(LHS, RHS);
56  }
57  Constant *CreateNSWMul(Constant *LHS, Constant *RHS) const {
58    return ConstantExpr::getNSWMul(LHS, RHS);
59  }
60  Constant *CreateFMul(Constant *LHS, Constant *RHS) const {
61    return ConstantExpr::getFMul(LHS, RHS);
62  }
63  Constant *CreateUDiv(Constant *LHS, Constant *RHS) const {
64    return ConstantExpr::getUDiv(LHS, RHS);
65  }
66  Constant *CreateSDiv(Constant *LHS, Constant *RHS) const {
67    return ConstantExpr::getSDiv(LHS, RHS);
68  }
69  Constant *CreateExactSDiv(Constant *LHS, Constant *RHS) const {
70    return ConstantExpr::getExactSDiv(LHS, RHS);
71  }
72  Constant *CreateFDiv(Constant *LHS, Constant *RHS) const {
73    return ConstantExpr::getFDiv(LHS, RHS);
74  }
75  Constant *CreateURem(Constant *LHS, Constant *RHS) const {
76    return ConstantExpr::getURem(LHS, RHS);
77  }
78  Constant *CreateSRem(Constant *LHS, Constant *RHS) const {
79    return ConstantExpr::getSRem(LHS, RHS);
80  }
81  Constant *CreateFRem(Constant *LHS, Constant *RHS) const {
82    return ConstantExpr::getFRem(LHS, RHS);
83  }
84  Constant *CreateShl(Constant *LHS, Constant *RHS) const {
85    return ConstantExpr::getShl(LHS, RHS);
86  }
87  Constant *CreateLShr(Constant *LHS, Constant *RHS) const {
88    return ConstantExpr::getLShr(LHS, RHS);
89  }
90  Constant *CreateAShr(Constant *LHS, Constant *RHS) const {
91    return ConstantExpr::getAShr(LHS, RHS);
92  }
93  Constant *CreateAnd(Constant *LHS, Constant *RHS) const {
94    return ConstantExpr::getAnd(LHS, RHS);
95  }
96  Constant *CreateOr(Constant *LHS, Constant *RHS) const {
97    return ConstantExpr::getOr(LHS, RHS);
98  }
99  Constant *CreateXor(Constant *LHS, Constant *RHS) const {
100    return ConstantExpr::getXor(LHS, RHS);
101  }
102
103  Constant *CreateBinOp(Instruction::BinaryOps Opc,
104                        Constant *LHS, Constant *RHS) const {
105    return ConstantExpr::get(Opc, LHS, RHS);
106  }
107
108  //===--------------------------------------------------------------------===//
109  // Unary Operators
110  //===--------------------------------------------------------------------===//
111
112  Constant *CreateNeg(Constant *C) const {
113    return ConstantExpr::getNeg(C);
114  }
115  Constant *CreateNSWNeg(Constant *C) const {
116    return ConstantExpr::getNSWNeg(C);
117  }
118  Constant *CreateFNeg(Constant *C) const {
119    return ConstantExpr::getFNeg(C);
120  }
121  Constant *CreateNot(Constant *C) const {
122    return ConstantExpr::getNot(C);
123  }
124
125  //===--------------------------------------------------------------------===//
126  // Memory Instructions
127  //===--------------------------------------------------------------------===//
128
129  Constant *CreateGetElementPtr(Constant *C, Constant* const *IdxList,
130                                unsigned NumIdx) const {
131    return ConstantExpr::getGetElementPtr(C, IdxList, NumIdx);
132  }
133  Constant *CreateGetElementPtr(Constant *C, Value* const *IdxList,
134                                unsigned NumIdx) const {
135    return ConstantExpr::getGetElementPtr(C, IdxList, NumIdx);
136  }
137
138  Constant *CreateInBoundsGetElementPtr(Constant *C, Constant* const *IdxList,
139                                        unsigned NumIdx) const {
140    return ConstantExpr::getInBoundsGetElementPtr(C, IdxList, NumIdx);
141  }
142  Constant *CreateInBoundsGetElementPtr(Constant *C, Value* const *IdxList,
143                                        unsigned NumIdx) const {
144    return ConstantExpr::getInBoundsGetElementPtr(C, IdxList, NumIdx);
145  }
146
147  //===--------------------------------------------------------------------===//
148  // Cast/Conversion Operators
149  //===--------------------------------------------------------------------===//
150
151  Constant *CreateCast(Instruction::CastOps Op, Constant *C,
152                       const Type *DestTy) const {
153    return ConstantExpr::getCast(Op, C, DestTy);
154  }
155  Constant *CreatePointerCast(Constant *C, const Type *DestTy) const {
156    return ConstantExpr::getPointerCast(C, DestTy);
157  }
158  Constant *CreateIntCast(Constant *C, const Type *DestTy,
159                          bool isSigned) const {
160    return ConstantExpr::getIntegerCast(C, DestTy, isSigned);
161  }
162  Constant *CreateFPCast(Constant *C, const Type *DestTy) const {
163    return ConstantExpr::getFPCast(C, DestTy);
164  }
165
166  Constant *CreateBitCast(Constant *C, const Type *DestTy) const {
167    return CreateCast(Instruction::BitCast, C, DestTy);
168  }
169  Constant *CreateIntToPtr(Constant *C, const Type *DestTy) const {
170    return CreateCast(Instruction::IntToPtr, C, DestTy);
171  }
172  Constant *CreatePtrToInt(Constant *C, const Type *DestTy) const {
173    return CreateCast(Instruction::PtrToInt, C, DestTy);
174  }
175  Constant *CreateZExtOrBitCast(Constant *C, const Type *DestTy) const {
176    return ConstantExpr::getZExtOrBitCast(C, DestTy);
177  }
178  Constant *CreateSExtOrBitCast(Constant *C, const Type *DestTy) const {
179    return ConstantExpr::getSExtOrBitCast(C, DestTy);
180  }
181
182  Constant *CreateTruncOrBitCast(Constant *C, const Type *DestTy) const {
183    return ConstantExpr::getTruncOrBitCast(C, DestTy);
184  }
185
186  //===--------------------------------------------------------------------===//
187  // Compare Instructions
188  //===--------------------------------------------------------------------===//
189
190  Constant *CreateICmp(CmpInst::Predicate P, Constant *LHS,
191                       Constant *RHS) const {
192    return ConstantExpr::getCompare(P, LHS, RHS);
193  }
194  Constant *CreateFCmp(CmpInst::Predicate P, Constant *LHS,
195                       Constant *RHS) const {
196    return ConstantExpr::getCompare(P, LHS, RHS);
197  }
198
199  //===--------------------------------------------------------------------===//
200  // Other Instructions
201  //===--------------------------------------------------------------------===//
202
203  Constant *CreateSelect(Constant *C, Constant *True, Constant *False) const {
204    return ConstantExpr::getSelect(C, True, False);
205  }
206
207  Constant *CreateExtractElement(Constant *Vec, Constant *Idx) const {
208    return ConstantExpr::getExtractElement(Vec, Idx);
209  }
210
211  Constant *CreateInsertElement(Constant *Vec, Constant *NewElt,
212                                Constant *Idx) const {
213    return ConstantExpr::getInsertElement(Vec, NewElt, Idx);
214  }
215
216  Constant *CreateShuffleVector(Constant *V1, Constant *V2,
217                                Constant *Mask) const {
218    return ConstantExpr::getShuffleVector(V1, V2, Mask);
219  }
220
221  Constant *CreateExtractValue(Constant *Agg, const unsigned *IdxList,
222                               unsigned NumIdx) const {
223    return ConstantExpr::getExtractValue(Agg, IdxList, NumIdx);
224  }
225
226  Constant *CreateInsertValue(Constant *Agg, Constant *Val,
227                              const unsigned *IdxList, unsigned NumIdx) const {
228    return ConstantExpr::getInsertValue(Agg, Val, IdxList, NumIdx);
229  }
230};
231
232}
233
234#endif
235