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