[PATCH] D102615: [LoopDeletion] Break backedge if we can prove that the loop is exited on 1st iteration

Tue May 25 09:23:09 PDT 2021

reames added a comment.

In D102615#2779766 <https://reviews.llvm.org/D102615#2779766>, @morehouse wrote:

> This patch appears to have caused a performance regression on the buildbots:  https://lab.llvm.org/buildbot/#/builders/105/builds/10180
>
> Please fix or revert.

FYI, given timezones, Max is asleep.  Feel free to revert in the meantime.

You should also plan to help with reducing a reproducer for the performance problem.  A quick glance at the built bot log doesn't show anything glaring obvious and I would not expect loop deletion becoming more effective to worsen performance.

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D102615/new/

https://reviews.llvm.org/D102615