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Optimize extendIntervalEndTo a tiny bit by saving one call through the
vector erase. No functionality changed. llvm-svn: 159746
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@ -196,16 +196,16 @@ void LiveInterval::extendIntervalEndTo(Ranges::iterator I, SlotIndex NewEnd) {
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// If NewEnd was in the middle of an interval, make sure to get its endpoint.
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I->end = std::max(NewEnd, prior(MergeTo)->end);
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// Erase any dead ranges.
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ranges.erase(llvm::next(I), MergeTo);
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// If the newly formed range now touches the range after it and if they have
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// the same value number, merge the two ranges into one range.
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Ranges::iterator Next = llvm::next(I);
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if (Next != ranges.end() && Next->start <= I->end && Next->valno == ValNo) {
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I->end = Next->end;
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ranges.erase(Next);
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if (MergeTo != ranges.end() && MergeTo->start <= I->end &&
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MergeTo->valno == ValNo) {
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I->end = MergeTo->end;
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++MergeTo;
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}
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// Erase any dead ranges.
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ranges.erase(llvm::next(I), MergeTo);
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}
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