[PATCH] D97495: [SimplifyCFG] avoid illegal phi with both poison and undef

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri added a comment.

I'm fine with having this as a quickfix, but i think we shouldn't pessimize such case in general, but actually properly handle it.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D97495/new/

https://reviews.llvm.org/D97495