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Fixed a crash in llvm-mc for Mach-O when a symbol difference expression uses a

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symbol from an assignment.  In this case the symbol did not have a fragment so
MCObjectWriter::IsSymbolRefDifferenceFullyResolved() should not have been
calling IsSymbolRefDifferenceFullyResolvedImpl() with a NULL fragment and should
just have returned false in that case.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149442 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Kevin Enderby
2012-01-31 23:02:57 +00:00
parent bda59fdd71
commit d49b2a7a9d
2 changed files with 29 additions and 0 deletions
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lib/MC/MCObjectWriter.cpp
+2
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@@ -68,6 +68,8 @@ MCObjectWriter::IsSymbolRefDifferenceFullyResolved(const MCAssembler &Asm,
const MCSymbolData &DataA = Asm.getSymbolData(SA);
const MCSymbolData &DataB = Asm.getSymbolData(SB);
if(!DataA.getFragment() || !DataB.getFragment())
return false;
return IsSymbolRefDifferenceFullyResolvedImpl(Asm, DataA,
*DataB.getFragment(),