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Fix broken isCopy handling in TrimLiveIntervalToLastUse

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llvm-svn: 107921
This commit is contained in:
Jakob Stoklund Olesen 2010-07-08 22:30:38 +00:00
parent 1ae7342eaf
commit 1ecf890d62
1 changed files with 7 additions and 3 deletions
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10
lib/CodeGen/SimpleRegisterCoalescing.cpp
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@ -618,10 +618,14 @@ SimpleRegisterCoalescing::TrimLiveIntervalToLastUse(SlotIndex CopyIdx,
// of last use.
LastUse->setIsKill();
removeRange(li, LastUseIdx.getDefIndex(), LR->end, li_, tri_);
if (LastUseMI->isCopy()) {
MachineOperand &DefMO = LastUseMI->getOperand(0);
if (DefMO.getReg() == li.reg && !DefMO.getSubReg())
DefMO.setIsDead();
}
unsigned SrcReg, DstReg, SrcSubIdx, DstSubIdx;
if ((LastUseMI->isCopy() && !LastUseMI->getOperand(0).getSubReg()) ||
(tii_->isMoveInstr(*LastUseMI, SrcReg, DstReg, SrcSubIdx, DstSubIdx) &&
DstReg == li.reg && DstSubIdx == 0)) {
if (tii_->isMoveInstr(*LastUseMI, SrcReg, DstReg, SrcSubIdx, DstSubIdx) &&
DstReg == li.reg && DstSubIdx == 0) {
// Last use is itself an identity code.
int DeadIdx = LastUseMI->findRegisterDefOperandIdx(li.reg,
false, false, tri_);