[PrunedLiveness] Branch summary merges to ending. #74815
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A branch instruction that is both a lifetime-ending user and also a non-lifetime-ending of a value should be regarded as a lifetime-ending user. Without this, utilities that rely on PrunedLiveness such as `LinearLiveness` and `InteriorLiveness` both incorrectly report that a branch featuring a value and also a reborrow or guaranteed phi are non-ending. rdar://130427564
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@swift-ci please test |
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@swift-ci please apple silicon benchmark |
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@swift-ci please test source compatibility |
This was referenced Jun 28, 2024
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A branch instruction that is both a lifetime-ending user and also a non-lifetime-ending of a value should be regarded as a lifetime-ending user.
Without this, utilities that rely on PrunedLiveness such as
LinearLivenessandInteriorLivenessboth incorrectly report that a branch featuring a value and also a reborrow or guaranteed phi are non-ending.rdar://130427564