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[MemorySSA] When applying updates, clean unnecessary Phis.

Authored by asbirlea on Jun 7 2019, 4:06 PM.



After applying a set of insert updates, there may be trivial Phis left over. Clean them up.

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asbirlea created this revision.Jun 7 2019, 4:06 PM
Herald added a project: Restricted Project. · View Herald TranscriptJun 7 2019, 4:06 PM
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LGTM -- thanks!

Please also add a test before committing if doing so is reasonably possible. If the test is super convoluted, I'm OK with this as-is.

This revision is now accepted and ready to land.Jun 10 2019, 1:58 PM
This revision was automatically updated to reflect the committed changes.