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 namespace llvm { 18 19 class 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. 24 class MCLabel { 25 // \brief The instance number of this Directional Local Label. 26 unsigned Instance; 27 28 private: // MCContext creates and uniques these. 29 friend class MCContext; 30 31 MCLabel(unsigned instance) : Instance(instance) {} 32 33 public: 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 50 inline 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
