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Special case the creation of relocation sections.

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These sections are never looked up and we know when have to create them. Use
that to save adding them to the regular map and avoid a symbol->string->symbol
conversion for the group symbol.

This also makes the implementation independent of the details of how unique
sections are implemented.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@233539 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola
2015-03-30 13:39:16 +00:00
parent 35efeb5e16
commit 0bd11cd898
3 changed files with 20 additions and 6 deletions
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12
lib/MC/MCContext.cpp
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@@ -275,6 +275,18 @@ void MCContext::renameELFSection(const MCSectionELF *Section, StringRef Name) {
const_cast<MCSectionELF*>(Section)->setSectionName(CachedName);
}
const MCSectionELF *
MCContext::createELFRelSection(StringRef Name, unsigned Type, unsigned Flags,
unsigned EntrySize, const MCSymbol *Group) {
StringMap<bool>::iterator I;
bool Inserted;
std::tie(I, Inserted) = ELFRelSecNames.insert(std::make_pair(Name, true));
return new (*this)
MCSectionELF(I->getKey(), Type, Flags, SectionKind::getReadOnly(),
EntrySize, Group, true, nullptr);
}
const MCSectionELF *MCContext::getELFSection(StringRef Section, unsigned Type,
unsigned Flags, unsigned EntrySize,
StringRef Group, bool Unique,