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/CodeGen/AsmPrinter.h"
15 #include "llvm/Support/Allocator.h"
16 
17 #include <utility>
18 
19 namespace llvm {
20 
21 class MCSymbol;
22 class MCSection;
23 class StringRef;
24 
25 // Collection of strings for this unit and assorted symbols.
26 // A String->Symbol mapping of strings used by indirect
27 // references.
28 class DwarfStringPool {
29   StringMap<std::pair<MCSymbol *, unsigned>, BumpPtrAllocator &> Pool;
30   StringRef Prefix;
31 
32 public:
33   DwarfStringPool(BumpPtrAllocator &A, AsmPrinter &Asm, StringRef Prefix)
34       : Pool(A), Prefix(Prefix) {}
35 
36   void emit(AsmPrinter &Asm, const MCSection *StrSection,
37             const MCSection *OffsetSection = nullptr);
38 
39   /// \brief Returns an entry into the string pool with the given
40   /// string text.
41   MCSymbol *getSymbol(AsmPrinter &Asm, StringRef Str);
42 
43   /// \brief Returns the index into the string pool with the given
44   /// string text.
45   unsigned getIndex(AsmPrinter &Asm, StringRef Str);
46 
47   bool empty() const { return Pool.empty(); }
48 };
49 }
50 #endif
51