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If the liveinterval of the source instruction has been extended, remove the IsKill marker.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34594 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2007-02-25 09:41:59 +00:00
parent bc025fbb64
commit 16191f0333
1 changed files with 6 additions and 0 deletions
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6
lib/CodeGen/LiveIntervalAnalysis.cpp
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@ -828,6 +828,12 @@ bool LiveIntervals::AdjustCopiesBackFrom(LiveInterval &IntA, LiveInterval &IntB,
IntB.MergeValueNumberInto(BValNo, ValLR->ValId);
DOUT << " result = "; IntB.print(DOUT, mri_);
DOUT << "\n";
// If the source instruction was killing the source register before the
// merge, unset the isKill marker given the live range has been extended.
MachineOperand *MOK = ValLREndInst->findRegisterUseOperand(IntB.reg, true);
if (MOK)
MOK->unsetIsKill();
// Finally, delete the copy instruction.
RemoveMachineInstrFromMaps(CopyMI);