1 //===- MCLabel.h - Machine Code Directional Local Labels --------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file contains the declaration of the MCLabel class. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #ifndef LLVM_MC_MCLABEL_H 14 #define LLVM_MC_MCLABEL_H 15 16 namespace llvm { 17 18 class raw_ostream; 19 20 /// Instances of this class represent a label name in the MC file, 21 /// and MCLabel are created and uniqued by the MCContext class. MCLabel 22 /// should only be constructed for valid instances in the object file. 23 class MCLabel { 24 // The instance number of this Directional Local Label. 25 unsigned Instance; 26 27 private: // MCContext creates and uniques these. 28 friend class MCContext; 29 MCLabel(unsigned instance)30 MCLabel(unsigned instance) : Instance(instance) {} 31 32 public: 33 MCLabel(const MCLabel &) = delete; 34 MCLabel &operator=(const MCLabel &) = delete; 35 36 /// Get the current instance of this Directional Local Label. getInstance()37 unsigned getInstance() const { return Instance; } 38 39 /// Increment the current instance of this Directional Local Label. incInstance()40 unsigned incInstance() { return ++Instance; } 41 42 /// Print the value to the stream \p OS. 43 void print(raw_ostream &OS) const; 44 45 /// Print the value to stderr. 46 void dump() const; 47 }; 48 49 inline raw_ostream &operator<<(raw_ostream &OS, const MCLabel &Label) { 50 Label.print(OS); 51 return OS; 52 } 53 54 } // end namespace llvm 55 56 #endif // LLVM_MC_MCLABEL_H 57