llvm-project/llvm/lib/VMCore/ConstantFold.h

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//===-- 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.
//
//===----------------------------------------------------------------------===//
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//
// 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.
//
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// These operators may return a null object if they don't know how to perform
// the specified operation on the specified constant types.
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//
//===----------------------------------------------------------------------===//
#ifndef CONSTANTFOLDING_H
#define CONSTANTFOLDING_H
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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
Constant *V, ///< The source constant
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const Type *DestTy ///< The destination type
);
Constant *ConstantFoldSelectInstruction(LLVMContext &Context,
Constant *Cond,
Constant *V1, Constant *V2);
Constant *ConstantFoldExtractElementInstruction(LLVMContext &Context,
Constant *Val,
Constant *Idx);
Constant *ConstantFoldInsertElementInstruction(LLVMContext &Context,
Constant *Val,
Constant *Elt,
Constant *Idx);
Constant *ConstantFoldShuffleVectorInstruction(LLVMContext &Context,
Constant *V1,
Constant *V2,
Constant *Mask);
Constant *ConstantFoldExtractValueInstruction(LLVMContext &Context,
Constant *Agg,
const unsigned *Idxs,
unsigned NumIdx);
Constant *ConstantFoldInsertValueInstruction(LLVMContext &Context,
Constant *Agg,
Constant *Val,
const unsigned *Idxs,
unsigned NumIdx);
Constant *ConstantFoldBinaryInstruction(LLVMContext &Context,
unsigned Opcode, Constant *V1,
Constant *V2);
Constant *ConstantFoldCompareInstruction(LLVMContext &Context,
unsigned short predicate,
Constant *C1, Constant *C2);
Constant *ConstantFoldGetElementPtr(LLVMContext &Context, Constant *C,
bool inBounds,
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Constant* const *Idxs, unsigned NumIdx);
} // End llvm namespace
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#endif