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//===- llvm/CodeGen/DwarfStringPool.h - Dwarf Debug Framework ---*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_CODEGEN_ASMPRINTER_DWARFSTRINGPOOL_H
#define LLVM_LIB_CODEGEN_ASMPRINTER_DWARFSTRINGPOOL_H
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/CodeGen/DwarfStringPoolEntry.h"
#include "llvm/Support/Allocator.h"
namespace llvm {
class AsmPrinter;
class MCSection;
class MCSymbol;
// Collection of strings for this unit and assorted symbols.
// A String->Symbol mapping of strings used by indirect
// references.
class DwarfStringPool {
using EntryTy = DwarfStringPoolEntry;
StringMap<EntryTy, BumpPtrAllocator &> Pool;
StringRef Prefix;
uint64_t NumBytes = 0;
unsigned NumIndexedStrings = 0;
bool ShouldCreateSymbols;
StringMapEntry<EntryTy> &getEntryImpl(AsmPrinter &Asm, StringRef Str);
public:
using EntryRef = DwarfStringPoolEntryRef;
DwarfStringPool(BumpPtrAllocator &A, AsmPrinter &Asm, StringRef Prefix);
void emitStringOffsetsTableHeader(AsmPrinter &Asm, MCSection *OffsetSection,
MCSymbol *StartSym);
void emit(AsmPrinter &Asm, MCSection *StrSection,
MCSection *OffsetSection = nullptr,
bool UseRelativeOffsets = false);
bool empty() const { return Pool.empty(); }
unsigned size() const { return Pool.size(); }
unsigned getNumIndexedStrings() const { return NumIndexedStrings; }
/// Get a reference to an entry in the string pool.
EntryRef getEntry(AsmPrinter &Asm, StringRef Str);
/// Same as getEntry, except that you can use EntryRef::getIndex to obtain a
/// unique ID of this entry (e.g., for use in indexed forms like
/// DW_FORM_strx).
EntryRef getIndexedEntry(AsmPrinter &Asm, StringRef Str);
};
} // end namespace llvm
#endif // LLVM_LIB_CODEGEN_ASMPRINTER_DWARFSTRINGPOOL_H
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