LLVM  8.0.0svn
DwarfStringPool.h
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1 //===- llvm/CodeGen/DwarfStringPool.h - Dwarf Debug Framework ---*- 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_LIB_CODEGEN_ASMPRINTER_DWARFSTRINGPOOL_H
11 #define LLVM_LIB_CODEGEN_ASMPRINTER_DWARFSTRINGPOOL_H
12 
13 #include "llvm/ADT/StringMap.h"
14 #include "llvm/ADT/StringRef.h"
16 #include "llvm/Support/Allocator.h"
17 
18 namespace llvm {
19 
20 class AsmPrinter;
21 class MCSection;
22 class MCSymbol;
23 
24 // Collection of strings for this unit and assorted symbols.
25 // A String->Symbol mapping of strings used by indirect
26 // references.
29 
31  StringRef Prefix;
32  unsigned NumBytes = 0;
33  unsigned NumIndexedStrings = 0;
34  bool ShouldCreateSymbols;
35 
36  StringMapEntry<EntryTy> &getEntryImpl(AsmPrinter &Asm, StringRef Str);
37 
38 public:
40 
42 
43  void emitStringOffsetsTableHeader(AsmPrinter &Asm, MCSection *OffsetSection,
44  MCSymbol *StartSym);
45 
46  void emit(AsmPrinter &Asm, MCSection *StrSection,
47  MCSection *OffsetSection = nullptr,
48  bool UseRelativeOffsets = false);
49 
50  bool empty() const { return Pool.empty(); }
51 
52  unsigned size() const { return Pool.size(); }
53 
54  unsigned getNumIndexedStrings() const { return NumIndexedStrings; }
55 
56  /// Get a reference to an entry in the string pool.
58 
59  /// Same as getEntry, except that you can use EntryRef::getIndex to obtain a
60  /// unique ID of this entry (e.g., for use in indexed forms like
61  /// DW_FORM_strx).
63 };
64 
65 } // end namespace llvm
66 
67 #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:39
Compute iterated dominance frontiers using a linear time algorithm.
Definition: AllocatorList.h:24
StringMapEntry - This is used to represent one value that is inserted into a StringMap.
Definition: StringMap.h:126
unsigned getNumIndexedStrings() const
MCSymbol - Instances of this class represent a symbol name in the MC file, and MCSymbols are created ...
Definition: MCSymbol.h:42
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:112
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:141
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:220
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:111
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:49
DwarfStringPool(BumpPtrAllocator &A, AsmPrinter &Asm, StringRef Prefix)