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//===-- ConstantFolding.h - Internal Constant Folding Interface -*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and 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 I 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;
// Constant fold various types of instruction...
Constant *ConstantFoldCastInstruction(
unsigned opcode, ///< The opcode of the cast
const Constant *V, ///< The source constant
const Type *DestTy ///< The destination type
);
Constant *ConstantFoldSelectInstruction(const Constant *Cond,
const Constant *V1,
const Constant *V2);
Constant *ConstantFoldExtractElementInstruction(const Constant *Val,
const Constant *Idx);
Constant *ConstantFoldInsertElementInstruction(const Constant *Val,
const Constant *Elt,
const Constant *Idx);
Constant *ConstantFoldShuffleVectorInstruction(const Constant *V1,
const Constant *V2,
const Constant *Mask);
Constant *ConstantFoldBinaryInstruction(unsigned Opcode, const Constant *V1,
const Constant *V2);
Constant *ConstantFoldCompareInstruction(unsigned short predicate,
const Constant *C1,
const Constant *C2);
Constant *ConstantFoldGetElementPtr(const Constant *C,
Constant* const *Idxs, unsigned NumIdx);
} // End llvm namespace
#endif
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