[PATCH] D80077: [LiveVariables] Don't set undef reg PHI used as live for FromMBB

[Kai Luo via Phabricator via llvm-commits]

lkail added a comment.

It looks like a bug in phi-node-elimination to me. When critical edge `bb.0 -> bb.2` is splitted and `bb.3` is inserted, `undef %undef` is transformed into `%3 = IMPLICIT_DEF` in `bb.3`. LV in `bb.2` is not updated.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D80077/new/

https://reviews.llvm.org/D80077