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

[serge via Phabricator via llvm-commits]

serge-sans-paille added a comment.

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.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D80707/new/

https://reviews.llvm.org/D80707