[PATCH] D80707: [legacyPM] Do not compute preserved analysis if there's no local change

[Jay Foad via Phabricator via llvm-commits]

foad added a comment.

In D80707#2066005 <https://reviews.llvm.org/D80707#2066005>, @serge-sans-paille wrote:

> https://reviews.llvm.org/D80916 proposes a few extra checks to ensure passes correctly report changes. I'll come back to this review once D80916 <https://reviews.llvm.org/D80916> is settled.


FWIW I was thinking of something simpler like P8225 <https://reviews.llvm.org/P8225> (almost completely untested).


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https://reviews.llvm.org/D80707