[PATCH] D139275: [SimplifyCFG] `FoldBranchToCommonDest()`: deal with mismatched IV's in PHI's in common successor block

[Artur Pilipenko via Phabricator via llvm-commits]

apilipenko added a comment.

FYI, this change caused widespread performance regressions in our testing. We haven't investigated further since the change was reverted.

I can re-run these tests and do some analysis on the next revision once you decide to reapply.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D139275/new/

https://reviews.llvm.org/D139275