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Don't depend on kill flags in removeCopyByCommutingDef().

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Kill flags are removed more and more aggressively during the register
allocation passes, it is better to get information from LiveIntervals.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163972 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen 2012-09-15 16:32:11 +00:00
parent 9ae03fa69f
commit ab9baf7ff4
1 changed files with 1 additions and 1 deletions
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2
lib/CodeGen/RegisterCoalescer.cpp
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@ -583,7 +583,7 @@ bool RegisterCoalescer::removeCopyByCommutingDef(const CoalescerPair &CP,
MachineOperand &NewDstMO = DefMI->getOperand(NewDstIdx);
unsigned NewReg = NewDstMO.getReg();
if (NewReg != IntB.reg || !NewDstMO.isKill())
if (NewReg != IntB.reg || !LiveRangeQuery(IntB, AValNo->def).isKill())
return false;
// Make sure there are no other definitions of IntB that would reach the