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misched: fix LI update for bottom-up.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153158 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Trick 2012-03-21 04:12:01 +00:00
parent 6244b51888
commit e0b51ab8d3
1 changed files with 7 additions and 1 deletions
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8
lib/CodeGen/LiveIntervalAnalysis.cpp
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@ -1319,8 +1319,14 @@ private:
void moveEnteringDownFrom(SlotIndex OldIdx, IntRangePair& P) {
LiveInterval* LI = P.first;
LiveRange* LR = P.second;
// Extend the LiveRange if NewIdx is past the end.
if (NewIdx > LR->end) {
moveKillFlags(LI->reg, LR->end, NewIdx);
// Move kill flags if OldIdx was not originally the end
// (otherwise LR->end points to an invalid slot).
if (LR->end.getRegSlot() != OldIdx.getRegSlot()) {
assert(LR->end > OldIdx && "LiveRange does not cover original slot");
moveKillFlags(LI->reg, LR->end, NewIdx);
}
LR->end = NewIdx.getRegSlot();
}
}