1 //===-- ConstantFolding.h - Internal Constant Folding Interface -*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the (internal) constant folding interfaces for LLVM. These
11 // interfaces are used by the ConstantExpr::get* methods to automatically fold
12 // constants when possible.
14 // These operators may return a null object if I don't know how to perform the
15 // specified operation on the specified constant types.
17 //===----------------------------------------------------------------------===//
19 #ifndef CONSTANTFOLDING_H
20 #define CONSTANTFOLDING_H
29 // Constant fold various types of instruction...
30 Constant *ConstantFoldCastInstruction(
31 unsigned opcode, ///< The opcode of the cast
32 const Constant *V, ///< The source constant
33 const Type *DestTy ///< The destination type
35 Constant *ConstantFoldSelectInstruction(const Constant *Cond,
38 Constant *ConstantFoldExtractElementInstruction(const Constant *Val,
40 Constant *ConstantFoldInsertElementInstruction(const Constant *Val,
43 Constant *ConstantFoldShuffleVectorInstruction(const Constant *V1,
45 const Constant *Mask);
46 Constant *ConstantFoldBinaryInstruction(unsigned Opcode, const Constant *V1,
48 Constant *ConstantFoldCompare(unsigned opcode, Constant *C1, Constant *C2,
49 unsigned short predicate);
50 Constant *ConstantFoldGetElementPtr(const Constant *C,
51 const std::vector<Value*> &IdxList);
52 } // End llvm namespace