MCLabel.h revision ebe7fcd041e1e9c3a0c535b26d8cdb45805bbeb8 
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  class MCContext;
19  class raw_ostream;
20
21  /// MCLabel - Instances of this class represent a label name in the MC file,
22  /// and MCLabel are created and unique'd by the MCContext class.  MCLabel
23  /// should only be constructed for valid instances in the object file.
24  class MCLabel {
25    // Instance - the instance number of this Directional Local Label
26    unsigned Instance;
27
28  private:  // MCContext creates and uniques these.
29    friend class MCContext;
30    MCLabel(unsigned instance)
31      : Instance(instance) {}
32
33    MCLabel(const MCLabel&);       // DO NOT IMPLEMENT
34    void operator=(const MCLabel&); // DO NOT IMPLEMENT
35  public:
36    /// getInstance - Get the current instance of this Directional Local Label.
37    unsigned getInstance() const { return Instance; }
38
39    /// incInstance - Increment the current instance of this Directional Local
40    /// Label.
41    unsigned incInstance() { return ++Instance; }
42
43    /// print - Print the value to the stream \arg OS.
44    void print(raw_ostream &OS) const;
45
46    /// dump - Print the value to stderr.
47    void dump() const;
48  };
49
50  inline raw_ostream &operator<<(raw_ostream &OS, const MCLabel &Label) {
51    Label.print(OS);
52    return OS;
53  }
54} // end namespace llvm
55
56#endif
57