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//===-- llvm/CodeGen/DwarfStringPool.h - Dwarf Debug Framework -*- C++ -*--===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_CODEGEN_ASMPRINTER_DWARFSTRINGPOOL_H
#define LLVM_LIB_CODEGEN_ASMPRINTER_DWARFSTRINGPOOL_H
#include "llvm/ADT/StringMap.h"
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/Support/Allocator.h"
#include <utility>
namespace llvm {
class MCSymbol;
class MCSection;
class StringRef;
// Collection of strings for this unit and assorted symbols.
// A String->Symbol mapping of strings used by indirect
// references.
class DwarfStringPool {
struct EntryTy {
MCSymbol *Symbol;
unsigned Offset;
unsigned Index;
};
StringMap<EntryTy, BumpPtrAllocator &> Pool;
StringRef Prefix;
unsigned NumBytes = 0;
public:
DwarfStringPool(BumpPtrAllocator &A, AsmPrinter &Asm, StringRef Prefix)
: Pool(A), Prefix(Prefix) {}
void emit(AsmPrinter &Asm, MCSection *StrSection,
MCSection *OffsetSection = nullptr);
/// \brief Returns an entry into the string pool with the given
/// string text.
MCSymbol *getSymbol(AsmPrinter &Asm, StringRef Str) {
return getEntry(Asm, Str).Symbol;
}
/// Get a byte offset into the string pool with the given text.
unsigned getOffset(AsmPrinter &Asm, StringRef Str) {
return getEntry(Asm, Str).Offset;
}
/// \brief Returns the index into the string pool with the given
/// string text.
unsigned getIndex(AsmPrinter &Asm, StringRef Str) {
return getEntry(Asm, Str).Index;
}
bool empty() const { return Pool.empty(); }
private:
EntryTy &getEntry(AsmPrinter &Asm, StringRef Str);
};
}
#endif
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