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"
15 #include "llvm/CodeGen/DwarfStringPoolEntry.h"
16 #include "llvm/Support/Allocator.h"
17 
18 namespace llvm {
19 
20 class AsmPrinter;
21 class MCSection;
22 
23 // Collection of strings for this unit and assorted symbols.
24 // A String->Symbol mapping of strings used by indirect
25 // references.
26 class DwarfStringPool {
27   using EntryTy = DwarfStringPoolEntry;
28 
29   StringMap<EntryTy, BumpPtrAllocator &> Pool;
30   StringRef Prefix;
31   unsigned NumBytes = 0;
32   bool ShouldCreateSymbols;
33 
34 public:
35   using EntryRef = DwarfStringPoolEntryRef;
36 
37   DwarfStringPool(BumpPtrAllocator &A, AsmPrinter &Asm, StringRef Prefix);
38 
39   void emit(AsmPrinter &Asm, MCSection *StrSection,
40             MCSection *OffsetSection = nullptr,
41             bool UseRelativeOffsets = false);
42 
43   bool empty() const { return Pool.empty(); }
44 
45   unsigned size() const { return Pool.size(); }
46 
47   /// Get a reference to an entry in the string pool.
48   EntryRef getEntry(AsmPrinter &Asm, StringRef Str);
49 };
50 
51 } // end namespace llvm
52 
53 #endif // LLVM_LIB_CODEGEN_ASMPRINTER_DWARFSTRINGPOOL_H
54