aboutsummaryrefslogtreecommitdiffstats
path: root/contrib/libs/llvm12/include/llvm/CodeGen/DwarfStringPoolEntry.h
blob: abdf6f026f481c7c3db212993c595927884662a8 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
#pragma once

#ifdef __GNUC__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-parameter"
#endif

//===- llvm/CodeGen/DwarfStringPoolEntry.h - String pool entry --*- 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_CODEGEN_DWARFSTRINGPOOLENTRY_H
#define LLVM_CODEGEN_DWARFSTRINGPOOLENTRY_H

#include "llvm/ADT/PointerIntPair.h"
#include "llvm/ADT/StringMap.h"

namespace llvm {

class MCSymbol;

/// Data for a string pool entry.
struct DwarfStringPoolEntry {
  static constexpr unsigned NotIndexed = -1;

  MCSymbol *Symbol;
  uint64_t Offset;
  unsigned Index;

  bool isIndexed() const { return Index != NotIndexed; }
};

/// String pool entry reference.
class DwarfStringPoolEntryRef {
  PointerIntPair<const StringMapEntry<DwarfStringPoolEntry> *, 1, bool>
      MapEntryAndIndexed;

  const StringMapEntry<DwarfStringPoolEntry> *getMapEntry() const {
    return MapEntryAndIndexed.getPointer();
  }

public:
  DwarfStringPoolEntryRef() = default;
  DwarfStringPoolEntryRef(const StringMapEntry<DwarfStringPoolEntry> &Entry,
                          bool Indexed)
      : MapEntryAndIndexed(&Entry, Indexed) {}

  explicit operator bool() const { return getMapEntry(); }
  MCSymbol *getSymbol() const {
    assert(getMapEntry()->second.Symbol && "No symbol available!");
    return getMapEntry()->second.Symbol;
  }
  uint64_t getOffset() const { return getMapEntry()->second.Offset; }
  bool isIndexed() const { return MapEntryAndIndexed.getInt(); }
  unsigned getIndex() const {
    assert(isIndexed());
    assert(getMapEntry()->getValue().isIndexed());
    return getMapEntry()->second.Index;
  }
  StringRef getString() const { return getMapEntry()->first(); }
  /// Return the entire string pool entry for convenience.
  DwarfStringPoolEntry getEntry() const { return getMapEntry()->getValue(); }

  bool operator==(const DwarfStringPoolEntryRef &X) const {
    return getMapEntry() == X.getMapEntry();
  }
  bool operator!=(const DwarfStringPoolEntryRef &X) const {
    return getMapEntry() != X.getMapEntry();
  }
};

} // end namespace llvm

#endif

#ifdef __GNUC__
#pragma GCC diagnostic pop
#endif