Andrew Scull | 5e1ddfa | 2018-08-14 10:06:54 +0100 | [diff] [blame] | 1 | //===- llvm/CodeGen/DwarfStringPoolEntry.h - String pool entry --*- 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 | #ifndef LLVM_CODEGEN_DWARFSTRINGPOOLENTRY_H |
| 11 | #define LLVM_CODEGEN_DWARFSTRINGPOOLENTRY_H |
| 12 | |
Andrew Scull | cdfcccc | 2018-10-05 20:58:37 +0100 | [diff] [blame^] | 13 | #include "llvm/ADT/PointerIntPair.h" |
Andrew Scull | 5e1ddfa | 2018-08-14 10:06:54 +0100 | [diff] [blame] | 14 | #include "llvm/ADT/StringMap.h" |
| 15 | |
| 16 | namespace llvm { |
| 17 | |
| 18 | class MCSymbol; |
| 19 | |
| 20 | /// Data for a string pool entry. |
| 21 | struct DwarfStringPoolEntry { |
Andrew Scull | cdfcccc | 2018-10-05 20:58:37 +0100 | [diff] [blame^] | 22 | static constexpr unsigned NotIndexed = -1; |
| 23 | |
Andrew Scull | 5e1ddfa | 2018-08-14 10:06:54 +0100 | [diff] [blame] | 24 | MCSymbol *Symbol; |
| 25 | unsigned Offset; |
| 26 | unsigned Index; |
Andrew Scull | cdfcccc | 2018-10-05 20:58:37 +0100 | [diff] [blame^] | 27 | |
| 28 | bool isIndexed() const { return Index != NotIndexed; } |
Andrew Scull | 5e1ddfa | 2018-08-14 10:06:54 +0100 | [diff] [blame] | 29 | }; |
| 30 | |
| 31 | /// String pool entry reference. |
Andrew Scull | cdfcccc | 2018-10-05 20:58:37 +0100 | [diff] [blame^] | 32 | class DwarfStringPoolEntryRef { |
| 33 | PointerIntPair<const StringMapEntry<DwarfStringPoolEntry> *, 1, bool> |
| 34 | MapEntryAndIndexed; |
| 35 | |
| 36 | const StringMapEntry<DwarfStringPoolEntry> *getMapEntry() const { |
| 37 | return MapEntryAndIndexed.getPointer(); |
| 38 | } |
Andrew Scull | 5e1ddfa | 2018-08-14 10:06:54 +0100 | [diff] [blame] | 39 | |
| 40 | public: |
| 41 | DwarfStringPoolEntryRef() = default; |
Andrew Scull | cdfcccc | 2018-10-05 20:58:37 +0100 | [diff] [blame^] | 42 | DwarfStringPoolEntryRef(const StringMapEntry<DwarfStringPoolEntry> &Entry, |
| 43 | bool Indexed) |
| 44 | : MapEntryAndIndexed(&Entry, Indexed) {} |
Andrew Scull | 5e1ddfa | 2018-08-14 10:06:54 +0100 | [diff] [blame] | 45 | |
Andrew Scull | cdfcccc | 2018-10-05 20:58:37 +0100 | [diff] [blame^] | 46 | explicit operator bool() const { return getMapEntry(); } |
Andrew Scull | 5e1ddfa | 2018-08-14 10:06:54 +0100 | [diff] [blame] | 47 | MCSymbol *getSymbol() const { |
Andrew Scull | cdfcccc | 2018-10-05 20:58:37 +0100 | [diff] [blame^] | 48 | assert(getMapEntry()->second.Symbol && "No symbol available!"); |
| 49 | return getMapEntry()->second.Symbol; |
Andrew Scull | 5e1ddfa | 2018-08-14 10:06:54 +0100 | [diff] [blame] | 50 | } |
Andrew Scull | cdfcccc | 2018-10-05 20:58:37 +0100 | [diff] [blame^] | 51 | unsigned getOffset() const { return getMapEntry()->second.Offset; } |
| 52 | bool isIndexed() const { return MapEntryAndIndexed.getInt(); } |
| 53 | unsigned getIndex() const { |
| 54 | assert(isIndexed()); |
| 55 | assert(getMapEntry()->getValue().isIndexed()); |
| 56 | return getMapEntry()->second.Index; |
| 57 | } |
| 58 | StringRef getString() const { return getMapEntry()->first(); } |
Andrew Scull | 5e1ddfa | 2018-08-14 10:06:54 +0100 | [diff] [blame] | 59 | /// Return the entire string pool entry for convenience. |
Andrew Scull | cdfcccc | 2018-10-05 20:58:37 +0100 | [diff] [blame^] | 60 | DwarfStringPoolEntry getEntry() const { return getMapEntry()->getValue(); } |
Andrew Scull | 5e1ddfa | 2018-08-14 10:06:54 +0100 | [diff] [blame] | 61 | |
Andrew Scull | cdfcccc | 2018-10-05 20:58:37 +0100 | [diff] [blame^] | 62 | bool operator==(const DwarfStringPoolEntryRef &X) const { |
| 63 | return getMapEntry() == X.getMapEntry(); |
| 64 | } |
| 65 | bool operator!=(const DwarfStringPoolEntryRef &X) const { |
| 66 | return getMapEntry() != X.getMapEntry(); |
| 67 | } |
Andrew Scull | 5e1ddfa | 2018-08-14 10:06:54 +0100 | [diff] [blame] | 68 | }; |
| 69 | |
| 70 | } // end namespace llvm |
| 71 | |
| 72 | #endif |