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//===- DWARFLocationExpression.h --------------------------------*- 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_DEBUGINFO_DWARF_DWARFLOCATIONEXPRESSION_H

#define LLVM_DEBUGINFO_DWARF_DWARFLOCATIONEXPRESSION_H

#include "llvm/DebugInfo/DWARF/DWARFAddressRange.h"

namespace llvm {

class raw_ostream;

/// Represents a single DWARF expression, whose value is location-dependent.

/// Typically used in DW_AT_location attributes to describe the location of

/// objects.

struct DWARFLocationExpression {

  /// The address range in which this expression is valid. None denotes a

  /// default entry which is valid in addresses not covered by other location

  /// expressions, or everywhere if there are no other expressions.

  std::optional<DWARFAddressRange> Range;

  /// The expression itself.

  SmallVector<uint8_t, 4> Expr;

};

inline bool operator==(const DWARFLocationExpression &L,

                       const DWARFLocationExpression &R) {

  return L.Range == R.Range && L.Expr == R.Expr;

}

inline bool operator!=(const DWARFLocationExpression &L,

                       const DWARFLocationExpression &R) {

  return !(L == R);

}

raw_ostream &operator<<(raw_ostream &OS, const DWARFLocationExpression &Loc);

/// Represents a set of absolute location expressions.

using DWARFLocationExpressionsVector = std::vector<DWARFLocationExpression>;

} // end namespace llvm

#endif // LLVM_DEBUGINFO_DWARF_DWARFLOCATIONEXPRESSION_H