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Add support for allowing us to create uniquely identified "COMDAT" or "ELF

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Group" sections while lowering. In particular, for ELF sections this is
useful for creating function-specific groups that get merged into the
same named section.

Also use const Twine& instead of StringRef for the getELF functions
while we're here.

Differential Revision: http://reviews.llvm.org/D21743

llvm-svn: 274336
This commit is contained in:
Eric Christopher
2016-07-01 06:07:38 +00:00
parent 0b6537e6e5
commit 36e601c6dc
3 changed files with 37 additions and 23 deletions
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6
llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
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@@ -69,11 +69,9 @@ void TargetLoweringObjectFileELF::emitPersonalityValue(
cast<MCSymbolELF>(getContext().getOrCreateSymbol(NameData));
Streamer.EmitSymbolAttribute(Label, MCSA_Hidden);
Streamer.EmitSymbolAttribute(Label, MCSA_Weak);
StringRef Prefix = ".data.";
NameData.insert(NameData.begin(), Prefix.begin(), Prefix.end());
unsigned Flags = ELF::SHF_ALLOC | ELF::SHF_WRITE | ELF::SHF_GROUP;
MCSection *Sec = getContext().getELFSection(NameData, ELF::SHT_PROGBITS,
Flags, 0, Label->getName());
MCSection *Sec = getContext().getELFNamedSection(".data", Label->getName(),
ELF::SHT_PROGBITS, Flags, 0);
unsigned Size = DL.getPointerSize();
Streamer.SwitchSection(Sec);
Streamer.EmitValueToAlignment(DL.getPointerABIAlignment());