llvm/llvm/include/llvm/MC/MCExpr.h

//===- MCExpr.h - Assembly Level Expressions --------------------*- 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
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_MC_MCEXPR_H
#define LLVM_MC_MCEXPR_H

#include "llvm/ADT/DenseMap.h"
#include "llvm/Support/SMLoc.h"
#include <cstdint>

namespace llvm {

class MCAsmInfo;
class MCAssembler;
class MCContext;
class MCFixup;
class MCFragment;
class MCSection;
class MCStreamer;
class MCSymbol;
class MCValue;
class raw_ostream;
class StringRef;

SectionAddrMap;

/// Base class for the full range of assembler expressions which are
/// needed for parsing.
class MCExpr { … };

inline raw_ostream &operator<<(raw_ostream &OS, const MCExpr &E) { … }

////  Represent a constant integer expression.
class MCConstantExpr : public MCExpr { … };

///  Represent a reference to a symbol from inside an expression.
///
/// A symbol reference in an expression may be a use of a label, a use of an
/// assembler variable (defined constant), or constitute an implicit definition
/// of the symbol as external.
class MCSymbolRefExpr : public MCExpr { … };

/// Unary assembler expressions.
class MCUnaryExpr : public MCExpr { … };

/// Binary assembler expressions.
class MCBinaryExpr : public MCExpr { … };

/// This is an extension point for target-specific MCExpr subclasses to
/// implement.
///
/// NOTE: All subclasses are required to have trivial destructors because
/// MCExprs are bump pointer allocated and not destructed.
class MCTargetExpr : public MCExpr { … };

} // end namespace llvm

#endif // LLVM_MC_MCEXPR_H