llvm-6502/lib/VMCore/ConstantFold.h
2009-08-11 17:45:13 +00:00

71 lines
3.4 KiB
C++

//===-- ConstantFolding.h - Internal Constant Folding Interface -*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the (internal) constant folding interfaces for LLVM. These
// interfaces are used by the ConstantExpr::get* methods to automatically fold
// constants when possible.
//
// These operators may return a null object if they don't know how to perform
// the specified operation on the specified constant types.
//
//===----------------------------------------------------------------------===//
#ifndef CONSTANTFOLDING_H
#define CONSTANTFOLDING_H
namespace llvm {
class Value;
class Constant;
class Type;
class LLVMContext;
// Constant fold various types of instruction...
Constant *ConstantFoldCastInstruction(
LLVMContext &Context,
unsigned opcode, ///< The opcode of the cast
const Constant *V, ///< The source constant
const Type *DestTy ///< The destination type
);
Constant *ConstantFoldSelectInstruction(LLVMContext &Context,
const Constant *Cond,
const Constant *V1,
const Constant *V2);
Constant *ConstantFoldExtractElementInstruction(LLVMContext &Context,
const Constant *Val,
const Constant *Idx);
Constant *ConstantFoldInsertElementInstruction(LLVMContext &Context,
const Constant *Val,
const Constant *Elt,
const Constant *Idx);
Constant *ConstantFoldShuffleVectorInstruction(LLVMContext &Context,
const Constant *V1,
const Constant *V2,
const Constant *Mask);
Constant *ConstantFoldExtractValueInstruction(LLVMContext &Context,
const Constant *Agg,
const unsigned *Idxs,
unsigned NumIdx);
Constant *ConstantFoldInsertValueInstruction(LLVMContext &Context,
const Constant *Agg,
const Constant *Val,
const unsigned* Idxs,
unsigned NumIdx);
Constant *ConstantFoldBinaryInstruction(LLVMContext &Context,
unsigned Opcode, const Constant *V1,
const Constant *V2);
Constant *ConstantFoldCompareInstruction(LLVMContext &Context,
unsigned short predicate,
const Constant *C1,
const Constant *C2);
Constant *ConstantFoldGetElementPtr(LLVMContext &Context, const Constant *C,
Constant* const *Idxs, unsigned NumIdx);
} // End llvm namespace
#endif