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Fix buildbot breakage where a def is missing.

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llvm-svn: 107698
This commit is contained in:
Jakob Stoklund Olesen
2010-07-06 21:06:39 +00:00
parent b36df17b08
commit bcf3409107
1 changed files with 2 additions and 0 deletions
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2
llvm/lib/CodeGen/SimpleRegisterCoalescing.cpp
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@@ -352,6 +352,8 @@ bool SimpleRegisterCoalescing::RemoveCopyByCommutingDef(const CoalescerPair &CP,
AValNo->isUnused() || AValNo->hasPHIKill())
return false;
MachineInstr *DefMI = li_->getInstructionFromIndex(AValNo->def);
if (!DefMI)
return false;
const TargetInstrDesc &TID = DefMI->getDesc();
if (!TID.isCommutable())
return false;