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Fix one more case of splitting after the last split point.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125137 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -746,8 +746,7 @@ void RAGreedy::splitAroundRegion(LiveInterval &VirtReg, unsigned PhysReg,
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continue;
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}
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if (IP.second.getBoundaryIndex() < BI.LastUse &&
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IP.second.getBoundaryIndex() <= BI.LastSplitPoint) {
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if (IP.second.getBoundaryIndex() < BI.LastUse) {
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// There are interference-free uses at the end of the block.
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// Find the first use that can get the live-out register.
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SmallVectorImpl<SlotIndex>::const_iterator UI =
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@ -755,14 +754,17 @@ void RAGreedy::splitAroundRegion(LiveInterval &VirtReg, unsigned PhysReg,
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IP.second.getBoundaryIndex());
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assert(UI != SA->UseSlots.end() && "Couldn't find last use");
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SlotIndex Use = *UI;
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DEBUG(dbgs() << ", free use at " << Use << ".\n");
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assert(Use <= BI.LastUse && "Couldn't find last use");
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// Only attempt a split befroe the last split point.
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if (Use.getBaseIndex() <= BI.LastSplitPoint) {
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DEBUG(dbgs() << ", free use at " << Use << ".\n");
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SlotIndex SegStart = SE.enterIntvBefore(Use);
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assert(SegStart >= IP.second && "Couldn't avoid interference");
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assert(SegStart < BI.LastSplitPoint && "Impossible split point");
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SE.useIntv(SegStart, Stop);
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continue;
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}
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}
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// Interference is after the last use.
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DEBUG(dbgs() << " after last use.\n");
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