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//==-- ConstantFold.h - DL-independent Constant Folding Interface -*- C++ -*-=//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file defines the DataLayout-independent constant folding interface.
// When possible, the DataLayout-aware constant folding interface in
// Analysis/ConstantFolding.h should be preferred.
//
// 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 LLVM_IR_CONSTANTFOLD_H
#define LLVM_IR_CONSTANTFOLD_H
#include "llvm/IR/InstrTypes.h"
#include <optional>
namespace llvm {
template <typename T> class ArrayRef;
class Value;
class Constant;
class Type;
// Constant fold various types of instruction...
Constant *ConstantFoldCastInstruction(
unsigned opcode, ///< The opcode of the cast
Constant *V, ///< The source constant
Type *DestTy ///< The destination type
);
Constant *ConstantFoldSelectInstruction(Constant *Cond,
Constant *V1, Constant *V2);
Constant *ConstantFoldExtractElementInstruction(Constant *Val, Constant *Idx);
Constant *ConstantFoldInsertElementInstruction(Constant *Val, Constant *Elt,
Constant *Idx);
Constant *ConstantFoldShuffleVectorInstruction(Constant *V1, Constant *V2,
ArrayRef<int> Mask);
Constant *ConstantFoldExtractValueInstruction(Constant *Agg,
ArrayRef<unsigned> Idxs);
Constant *ConstantFoldInsertValueInstruction(Constant *Agg, Constant *Val,
ArrayRef<unsigned> Idxs);
Constant *ConstantFoldUnaryInstruction(unsigned Opcode, Constant *V);
Constant *ConstantFoldBinaryInstruction(unsigned Opcode, Constant *V1,
Constant *V2);
Constant *ConstantFoldCompareInstruction(CmpInst::Predicate Predicate,
Constant *C1, Constant *C2);
Constant *ConstantFoldGetElementPtr(Type *Ty, Constant *C,
std::optional<ConstantRange> InRange,
ArrayRef<Value *> Idxs);
} // End llvm namespace
#endif
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