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4b9083329d
The string pool is shared among several units in the case of LTO, and it potentially can exceed the limit of 4GiB for an extremely large application. As it is now possible to emit 64-bit debugging info, the limitation can be removed. Differential Revision: https://reviews.llvm.org/D87025
72 lines
2.2 KiB
C++
72 lines
2.2 KiB
C++
//===- llvm/CodeGen/DwarfStringPoolEntry.h - String pool entry --*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CODEGEN_DWARFSTRINGPOOLENTRY_H
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#define LLVM_CODEGEN_DWARFSTRINGPOOLENTRY_H
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#include "llvm/ADT/PointerIntPair.h"
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#include "llvm/ADT/StringMap.h"
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namespace llvm {
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class MCSymbol;
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/// Data for a string pool entry.
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struct DwarfStringPoolEntry {
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static constexpr unsigned NotIndexed = -1;
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MCSymbol *Symbol;
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uint64_t Offset;
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unsigned Index;
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bool isIndexed() const { return Index != NotIndexed; }
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};
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/// String pool entry reference.
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class DwarfStringPoolEntryRef {
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PointerIntPair<const StringMapEntry<DwarfStringPoolEntry> *, 1, bool>
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MapEntryAndIndexed;
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const StringMapEntry<DwarfStringPoolEntry> *getMapEntry() const {
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return MapEntryAndIndexed.getPointer();
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}
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public:
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DwarfStringPoolEntryRef() = default;
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DwarfStringPoolEntryRef(const StringMapEntry<DwarfStringPoolEntry> &Entry,
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bool Indexed)
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: MapEntryAndIndexed(&Entry, Indexed) {}
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explicit operator bool() const { return getMapEntry(); }
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MCSymbol *getSymbol() const {
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assert(getMapEntry()->second.Symbol && "No symbol available!");
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return getMapEntry()->second.Symbol;
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}
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uint64_t getOffset() const { return getMapEntry()->second.Offset; }
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bool isIndexed() const { return MapEntryAndIndexed.getInt(); }
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unsigned getIndex() const {
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assert(isIndexed());
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assert(getMapEntry()->getValue().isIndexed());
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return getMapEntry()->second.Index;
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}
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StringRef getString() const { return getMapEntry()->first(); }
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/// Return the entire string pool entry for convenience.
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DwarfStringPoolEntry getEntry() const { return getMapEntry()->getValue(); }
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bool operator==(const DwarfStringPoolEntryRef &X) const {
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return getMapEntry() == X.getMapEntry();
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}
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bool operator!=(const DwarfStringPoolEntryRef &X) const {
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return getMapEntry() != X.getMapEntry();
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}
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};
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} // end namespace llvm
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#endif
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