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