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018e1309ce
Stop creating symbols we don't need in `DwarfStringPool`. The consumers only call `DwarfStringPoolEntryRef::getSymbol()` when DWARF is relocatable, so this just stops creating the unused symbols when it's not. This drops memory usage from 851 MB to 845 MB, around 0.7%. (I'm looking at `llc` memory usage on `verify-uselistorder.lto.opt.bc`; see r236629 for details.) llvm-svn: 238122
52 lines
1.4 KiB
C++
52 lines
1.4 KiB
C++
//===- llvm/CodeGen/DwarfStringPoolEntry.h - String pool entry --*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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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/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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MCSymbol *Symbol;
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unsigned Offset;
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unsigned Index;
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};
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/// String pool entry reference.
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struct DwarfStringPoolEntryRef {
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const StringMapEntry<DwarfStringPoolEntry> *I = nullptr;
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public:
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DwarfStringPoolEntryRef() = default;
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explicit DwarfStringPoolEntryRef(
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const StringMapEntry<DwarfStringPoolEntry> &I)
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: I(&I) {}
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explicit operator bool() const { return I; }
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MCSymbol *getSymbol() const {
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assert(I->second.Symbol && "No symbol available!");
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return I->second.Symbol;
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}
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unsigned getOffset() const { return I->second.Offset; }
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unsigned getIndex() const { return I->second.Index; }
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StringRef getString() const { return I->first(); }
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bool operator==(const DwarfStringPoolEntryRef &X) const { return I == X.I; }
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bool operator!=(const DwarfStringPoolEntryRef &X) const { return I != X.I; }
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};
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} // end namespace llvm
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#endif
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