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| //===- llvm/CodeGen/DwarfStringPoolEntry.h - String pool entry --*- 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_CODEGEN_DWARFSTRINGPOOLENTRY_H
#define LLVM_CODEGEN_DWARFSTRINGPOOLENTRY_H
#include "llvm/ADT/PointerIntPair.h"
#include "llvm/ADT/StringMap.h"
namespace llvm {
class MCSymbol;
/// Data for a string pool entry.
struct DwarfStringPoolEntry {
static constexpr unsigned NotIndexed = -1;
MCSymbol *Symbol;
unsigned Offset;
unsigned Index;
bool isIndexed() const { return Index != NotIndexed; }
};
/// String pool entry reference.
class DwarfStringPoolEntryRef {
PointerIntPair<const StringMapEntry<DwarfStringPoolEntry> *, 1, bool>
MapEntryAndIndexed;
const StringMapEntry<DwarfStringPoolEntry> *getMapEntry() const {
return MapEntryAndIndexed.getPointer();
}
public:
DwarfStringPoolEntryRef() = default;
DwarfStringPoolEntryRef(const StringMapEntry<DwarfStringPoolEntry> &Entry,
bool Indexed)
: MapEntryAndIndexed(&Entry, Indexed) {}
explicit operator bool() const { return getMapEntry(); }
MCSymbol *getSymbol() const {
assert(getMapEntry()->second.Symbol && "No symbol available!");
return getMapEntry()->second.Symbol;
}
unsigned getOffset() const { return getMapEntry()->second.Offset; }
bool isIndexed() const { return MapEntryAndIndexed.getInt(); }
unsigned getIndex() const {
assert(isIndexed());
assert(getMapEntry()->getValue().isIndexed());
return getMapEntry()->second.Index;
}
StringRef getString() const { return getMapEntry()->first(); }
/// Return the entire string pool entry for convenience.
DwarfStringPoolEntry getEntry() const { return getMapEntry()->getValue(); }
bool operator==(const DwarfStringPoolEntryRef &X) const {
return getMapEntry() == X.getMapEntry();
}
bool operator!=(const DwarfStringPoolEntryRef &X) const {
return getMapEntry() != X.getMapEntry();
}
};
} // end namespace llvm
#endif
|