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MCDwarf: Initialize MCLineTableHeader::Label

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This sometimes remains null into MCLineTableHeader::Emit where we
conditionally construct a label if one isn't provided for us. We need it
to remain null (rather than just always constructing the label) so we
can identify unused line tables... which is a bit weird and maybe we can
do away with that logic one day (& on that day we can always construct
the label up-front and just have compilation units query the line table
for its label, etc)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203967 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Blaikie 2014-03-14 20:36:44 +00:00
parent 19f2fea461
commit c75ec15881
1 changed files with 1 additions and 0 deletions
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include/llvm/MC/MCDwarf.h
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@ -179,6 +179,7 @@ struct MCDwarfLineTableHeader {
MCSymbol *Label;
SmallVector<std::string, 3> MCDwarfDirs;
SmallVector<MCDwarfFile, 3> MCDwarfFiles;
MCDwarfLineTableHeader() : Label(nullptr) {}
unsigned getFile(StringRef Directory, StringRef FileName, unsigned FileNumber);
std::pair<MCSymbol *, MCSymbol *> Emit(MCStreamer *MCOS) const;
};