llvm/llvm/include/llvm/CodeGen/MachineConstantPool.h

//===- CodeGen/MachineConstantPool.h - Abstract Constant Pool ---*- 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
//
//===----------------------------------------------------------------------===//
//
/// @file
/// This file declares the MachineConstantPool class which is an abstract
/// constant pool to keep track of constants referenced by a function.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_CODEGEN_MACHINECONSTANTPOOL_H
#define LLVM_CODEGEN_MACHINECONSTANTPOOL_H

#include "llvm/ADT/DenseSet.h"
#include "llvm/MC/SectionKind.h"
#include "llvm/Support/Alignment.h"
#include <climits>
#include <vector>

namespace llvm {

class Constant;
class DataLayout;
class FoldingSetNodeID;
class MachineConstantPool;
class raw_ostream;
class Type;

/// Abstract base class for all machine specific constantpool value subclasses.
///
class MachineConstantPoolValue { … };

inline raw_ostream &operator<<(raw_ostream &OS,
                               const MachineConstantPoolValue &V) { … }

/// This class is a data container for one entry in a MachineConstantPool.
/// It contains a pointer to the value and an offset from the start of
/// the constant pool.
/// An entry in a MachineConstantPool
class MachineConstantPoolEntry { … };

/// The MachineConstantPool class keeps track of constants referenced by a
/// function which must be spilled to memory.  This is used for constants which
/// are unable to be used directly as operands to instructions, which typically
/// include floating point and large integer constants.
///
/// Instructions reference the address of these constant pool constants through
/// the use of MO_ConstantPoolIndex values.  When emitting assembly or machine
/// code, these virtual address references are converted to refer to the
/// address of the function constant pool values.
/// The machine constant pool.
class MachineConstantPool { … };

} // end namespace llvm

#endif // LLVM_CODEGEN_MACHINECONSTANTPOOL_H