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
27 // Constant fold various types of instruction...
28 Constant *ConstantFoldCastInstruction(
29 unsigned opcode, ///< The opcode of the cast
30 const Constant *V, ///< The source constant
31 const Type *DestTy ///< The destination type
33 Constant *ConstantFoldSelectInstruction(const Constant *Cond,
36 Constant *ConstantFoldExtractElementInstruction(const Constant *Val,
38 Constant *ConstantFoldInsertElementInstruction(const Constant *Val,
41 Constant *ConstantFoldShuffleVectorInstruction(const Constant *V1,
43 const Constant *Mask);
44 Constant *ConstantFoldBinaryInstruction(unsigned Opcode, const Constant *V1,
46 Constant *ConstantFoldCompareInstruction(unsigned short predicate,
49 Constant *ConstantFoldGetElementPtr(const Constant *C,
50 Constant* const *Idxs, unsigned NumIdx);
51 } // End llvm namespace