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Dir : ~/usr/include/llvm/IR/

Edit File: ConstantFold.h

//==-- 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