LLVM  10.0.0svn
DwarfStringPool.h
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1 //===- llvm/CodeGen/DwarfStringPool.h - Dwarf Debug Framework ---*- 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 #ifndef LLVM_LIB_CODEGEN_ASMPRINTER_DWARFSTRINGPOOL_H
10 #define LLVM_LIB_CODEGEN_ASMPRINTER_DWARFSTRINGPOOL_H
11 
12 #include "llvm/ADT/StringMap.h"
13 #include "llvm/ADT/StringRef.h"
15 #include "llvm/Support/Allocator.h"
16 
17 namespace llvm {
18 
19 class AsmPrinter;
20 class MCSection;
21 class MCSymbol;
22 
23 // Collection of strings for this unit and assorted symbols.
24 // A String->Symbol mapping of strings used by indirect
25 // references.
28 
30  StringRef Prefix;
31  unsigned NumBytes = 0;
32  unsigned NumIndexedStrings = 0;
33  bool ShouldCreateSymbols;
34 
35  StringMapEntry<EntryTy> &getEntryImpl(AsmPrinter &Asm, StringRef Str);
36 
37 public:
39 
41 
42  void emitStringOffsetsTableHeader(AsmPrinter &Asm, MCSection *OffsetSection,
43  MCSymbol *StartSym);
44 
45  void emit(AsmPrinter &Asm, MCSection *StrSection,
46  MCSection *OffsetSection = nullptr,
47  bool UseRelativeOffsets = false);
48 
49  bool empty() const { return Pool.empty(); }
50 
51  unsigned size() const { return Pool.size(); }
52 
53  unsigned getNumIndexedStrings() const { return NumIndexedStrings; }
54 
55  /// Get a reference to an entry in the string pool.
57 
58  /// Same as getEntry, except that you can use EntryRef::getIndex to obtain a
59  /// unique ID of this entry (e.g., for use in indexed forms like
60  /// DW_FORM_strx).
62 };
63 
64 } // end namespace llvm
65 
66 #endif // LLVM_LIB_CODEGEN_ASMPRINTER_DWARFSTRINGPOOL_H
Instances of this class represent a uniqued identifier for a section in the current translation unit...
Definition: MCSection.h:38
This class represents lattice values for constants.
Definition: AllocatorList.h:23
StringMapEntry - This is used to represent one value that is inserted into a StringMap.
Definition: StringMap.h:125
unsigned getNumIndexedStrings() const
MCSymbol - Instances of this class represent a symbol name in the MC file, and MCSymbols are created ...
Definition: MCSymbol.h:41
void emit(AsmPrinter &Asm, MCSection *StrSection, MCSection *OffsetSection=nullptr, bool UseRelativeOffsets=false)
This file defines the MallocAllocator and BumpPtrAllocator interfaces.
unsigned size() const
Definition: StringMap.h:111
EntryRef getIndexedEntry(AsmPrinter &Asm, StringRef Str)
Same as getEntry, except that you can use EntryRef::getIndex to obtain a unique ID of this entry (e...
Data for a string pool entry.
Allocate memory in an ever growing pool, as if by bump-pointer.
Definition: Allocator.h:140
This class is intended to be used as a driving class for all asm writers.
Definition: AsmPrinter.h:78
unsigned size() const
StringMap - This is an unconventional map that is specialized for handling keys that are "strings"...
Definition: StringMap.h:219
String pool entry reference.
void emitStringOffsetsTableHeader(AsmPrinter &Asm, MCSection *OffsetSection, MCSymbol *StartSym)
EntryRef getEntry(AsmPrinter &Asm, StringRef Str)
Get a reference to an entry in the string pool.
bool empty() const
Definition: StringMap.h:110
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:48
DwarfStringPool(BumpPtrAllocator &A, AsmPrinter &Asm, StringRef Prefix)