[PATCH] D45754: [PM/LoopUnswitch] Detect irreducible control flow within loops and skip unswitching non-trivial edges.

[Florian Hahn via Phabricator via llvm-commits]

fhahn accepted this revision.
fhahn added a comment.
This revision is now accepted and ready to land.

Thanks, LGTM.

Having a single function to detect irreducible CFGs allows us to test it more widely and in case it turns out to be a bottleneck, I think there are a couple of things we can do to improve the performance. The most prominent issue is probably that we re-do work for inner loops
, when loops  are processed from inner to outer loop nests.


Repository:
  rL LLVM

https://reviews.llvm.org/D45754