1//===- MCLabel.h - Machine Code Directional Local Labels --------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file contains the declaration of the MCLabel class.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef LLVM_MC_MCLABEL_H
15#define LLVM_MC_MCLABEL_H
16
17namespace llvm {
18
19class raw_ostream;
20
21/// \brief Instances of this class represent a label name in the MC file,
22/// and MCLabel are created and uniqued by the MCContext class.  MCLabel
23/// should only be constructed for valid instances in the object file.
24class MCLabel {
25  // \brief The instance number of this Directional Local Label.
26  unsigned Instance;
27
28private: // MCContext creates and uniques these.
29  friend class MCContext;
30
31  MCLabel(unsigned instance) : Instance(instance) {}
32
33public:
34  MCLabel(const MCLabel &) = delete;
35  MCLabel &operator=(const MCLabel &) = delete;
36
37  /// \brief Get the current instance of this Directional Local Label.
38  unsigned getInstance() const { return Instance; }
39
40  /// \brief Increment the current instance of this Directional Local Label.
41  unsigned incInstance() { return ++Instance; }
42
43  /// \brief Print the value to the stream \p OS.
44  void print(raw_ostream &OS) const;
45
46  /// \brief Print the value to stderr.
47  void dump() const;
48};
49
50inline raw_ostream &operator<<(raw_ostream &OS, const MCLabel &Label) {
51  Label.print(OS);
52  return OS;
53}
54
55} // end namespace llvm
56
57#endif // LLVM_MC_MCLABEL_H
58