Home | History | Annotate | Line # | Download | only in MC 
      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 
     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.
     37   unsigned getInstance() const { return Instance; }
     38 
     39   /// Increment the current instance of this Directional Local Label.
     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