MCLabel.h revision 288943 
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
17#include "llvm/Support/Compiler.h"
18
19namespace llvm {
20class MCContext;
21class raw_ostream;
22
23/// \brief Instances of this class represent a label name in the MC file,
24/// and MCLabel are created and uniqued by the MCContext class.  MCLabel
25/// should only be constructed for valid instances in the object file.
26class MCLabel {
27  // \brief The instance number of this Directional Local Label.
28  unsigned Instance;
29
30private: // MCContext creates and uniques these.
31  friend class MCContext;
32  MCLabel(unsigned instance) : Instance(instance) {}
33
34  MCLabel(const MCLabel &) = delete;
35  void operator=(const MCLabel &) = delete;
36
37public:
38  /// \brief Get the current instance of this Directional Local Label.
39  unsigned getInstance() const { return Instance; }
40
41  /// \brief Increment the current instance of this Directional Local Label.
42  unsigned incInstance() { return ++Instance; }
43
44  /// \brief Print the value to the stream \p OS.
45  void print(raw_ostream &OS) const;
46
47  /// \brief Print the value to stderr.
48  void dump() const;
49};
50
51inline raw_ostream &operator<<(raw_ostream &OS, const MCLabel &Label) {
52  Label.print(OS);
53  return OS;
54}
55} // end namespace llvm
56
57#endif
58