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

[Zhang Kang via Phabricator via llvm-commits]

ZhangKang added a comment.

In D80077#2044775 <https://reviews.llvm.org/D80077#2044775>, @bjope wrote:

> Maybe it could be considered as cheating a bit, but it seems like PHIElimination has some options that can help trigger the critical edge splitting without even having a loop.
>  So by adding some extra cmd line options I managed to create a reproducer that is quite similar to your description:


Yes, your small case can work well. I have used it. Thank you very much.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D80077/new/

https://reviews.llvm.org/D80077