1 //===-- ConstantFolding.h - Internal Constant Folding Interface -*- 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 (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 they don't know how to perform
15 // the specified operation on the specified constant types.
17 //===----------------------------------------------------------------------===//
19 #ifndef CONSTANTFOLDING_H
20 #define CONSTANTFOLDING_H
28 // Constant fold various types of instruction...
29 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(LLVMContext &Context,
39 Constant *ConstantFoldExtractElementInstruction(LLVMContext &Context,
42 Constant *ConstantFoldInsertElementInstruction(LLVMContext &Context,
46 Constant *ConstantFoldShuffleVectorInstruction(LLVMContext &Context,
49 const Constant *Mask);
50 Constant *ConstantFoldExtractValueInstruction(LLVMContext &Context,
54 Constant *ConstantFoldInsertValueInstruction(LLVMContext &Context,
59 Constant *ConstantFoldBinaryInstruction(LLVMContext &Context,
60 unsigned Opcode, const Constant *V1,
62 Constant *ConstantFoldCompareInstruction(LLVMContext &Context,
63 unsigned short predicate,
66 Constant *ConstantFoldGetElementPtr(LLVMContext &Context, const Constant *C,
67 Constant* const *Idxs, unsigned NumIdx);
68 } // End llvm namespace