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 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
