LLVM  3.7.0
MCLabel.h
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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 
19 namespace llvm {
20 class MCContext;
21 class 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.
26 class MCLabel {
27  // \brief The instance number of this Directional Local Label.
28  unsigned Instance;
29 
30 private: // 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 
37 public:
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 
51 inline raw_ostream &operator<<(raw_ostream &OS, const MCLabel &Label) {
52  Label.print(OS);
53  return OS;
54 }
55 } // end namespace llvm
56 
57 #endif
unsigned getInstance() const
Get the current instance of this Directional Local Label.
Definition: MCLabel.h:39
Context object for machine code objects.
Definition: MCContext.h:48
void print(raw_ostream &OS) const
Print the value to the stream OS.
Definition: MCLabel.cpp:15
void dump() const
Print the value to stderr.
Definition: MCLabel.cpp:20
unsigned incInstance()
Increment the current instance of this Directional Local Label.
Definition: MCLabel.h:42
raw_ostream & operator<<(raw_ostream &OS, const APInt &I)
Definition: APInt.h:1738
Instances of this class represent a label name in the MC file, and MCLabel are created and uniqued by...
Definition: MCLabel.h:26
This class implements an extremely fast bulk output stream that can only output to a stream...
Definition: raw_ostream.h:38