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Avoid editing the current live interval during remat.

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The live interval may be used for a spill slot as well, and that spill slot
could be shared by split registers. We cannot shrink it, even if we know the
current register won't need the spill slot in that range.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110721 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen 2010-08-10 20:45:07 +00:00
parent 987eeccb61
commit b67b12ea64
1 changed files with 3 additions and 3 deletions
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6
lib/CodeGen/InlineSpiller.cpp
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@ -270,7 +270,7 @@ void InlineSpiller::reMaterializeAll() {
lis_.RemoveMachineInstrFromMaps(DefMI);
vrm_.RemoveMachineInstrFromMaps(DefMI);
DefMI->eraseFromParent();
li_->removeValNo(VNI);
VNI->setIsDefAccurate(false);
anyRemoved = true;
}
@ -286,8 +286,8 @@ void InlineSpiller::reMaterializeAll() {
MachineBasicBlock::iterator NextMI = MI;
++NextMI;
if (NextMI != MI->getParent()->end() && !lis_.isNotInMIMap(NextMI)) {
SlotIndex NearIdx = lis_.getInstructionIndex(NextMI);
if (li_->liveAt(NearIdx))
VNInfo *VNI = li_->getVNInfoAt(lis_.getInstructionIndex(NextMI));
if (VNI && (VNI->hasPHIKill() || usedValues_.count(VNI)))
continue;
}
DEBUG(dbgs() << "Removing debug info due to remat:" << "\t" << *MI);