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If a split live interval is spilled again, remove the kill marker on its last use.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44611 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2007-12-05 09:51:10 +00:00
parent f38d14f03e
commit adf8590690
3 changed files with 25 additions and 2 deletions
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5
lib/CodeGen/LiveIntervalAnalysis.cpp
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@ -1165,6 +1165,7 @@ addIntervalsForSpills(const LiveInterval &li,
// it's also guaranteed to be a single val# / range interval.
if (vrm.getPreSplitReg(li.reg)) {
vrm.setIsSplitFromReg(li.reg, 0);
vrm.removeKillPoint(li.reg);
bool DefIsReMat = vrm.isReMaterialized(li.reg);
Slot = vrm.getStackSlot(li.reg);
assert(Slot != VirtRegMap::MAX_STACK_SLOT);
@ -1398,8 +1399,10 @@ addIntervalsForSpills(const LiveInterval &li,
int UseIdx = LastUse->findRegisterUseOperandIdx(LI->reg);
assert(UseIdx != -1);
if (LastUse->getInstrDescriptor()->
getOperandConstraint(UseIdx, TOI::TIED_TO) == -1)
getOperandConstraint(UseIdx, TOI::TIED_TO) == -1) {
LastUse->getOperand(UseIdx).setIsKill();
vrm.addKillPoint(LI->reg, &LastUse->getOperand(UseIdx));
}
}
RetNewLIs.push_back(LI);
}