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 58
