DWARFLocationExpression.h revision 360784 
1//===- DWARFLocationExpression.h --------------------------------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#ifndef LLVM_DEBUGINFO_DWARF_DWARFLOCATIONEXPRESSION_H
10#define LLVM_DEBUGINFO_DWARF_DWARFLOCATIONEXPRESSION_H
11
12#include "llvm/ADT/Optional.h"
13#include "llvm/DebugInfo/DWARF/DWARFAddressRange.h"
14
15namespace llvm {
16
17class raw_ostream;
18
19/// Represents a single DWARF expression, whose value is location-dependent.
20/// Typically used in DW_AT_location attributes to describe the location of
21/// objects.
22struct DWARFLocationExpression {
23  /// The address range in which this expression is valid. None denotes a
24  /// default entry which is valid in addresses not covered by other location
25  /// expressions, or everywhere if there are no other expressions.
26  Optional<DWARFAddressRange> Range;
27
28  /// The expression itself.
29  SmallVector<uint8_t, 4> Expr;
30};
31
32inline bool operator==(const DWARFLocationExpression &L,
33                       const DWARFLocationExpression &R) {
34  return L.Range == R.Range && L.Expr == R.Expr;
35}
36
37inline bool operator!=(const DWARFLocationExpression &L,
38                       const DWARFLocationExpression &R) {
39  return !(L == R);
40}
41
42raw_ostream &operator<<(raw_ostream &OS, const DWARFLocationExpression &Loc);
43
44/// Represents a set of absolute location expressions.
45using DWARFLocationExpressionsVector = std::vector<DWARFLocationExpression>;
46
47} // end namespace llvm
48
49#endif // LLVM_DEBUGINFO_DWARF_DWARFLOCATIONEXPRESSION_H
50