[PATCH] D52558: [PHIElimination] Lower a PHI node with only undef uses as IMPLICIT_DEF

[Bjorn Pettersson via Phabricator via llvm-commits]

bjope added reviewers: MatzeB, tstellar.
bjope added a comment.

This is slightly related to https://bugs.llvm.org/show_bug.cgi?id=39085, but this patch is supposed to focus on getting IMPLICIT_DEF when all PHI inputs are undefined.
The PR is about the problem with updating "killed" that is mentioned in the "bar" part of the test case.


Repository:
  rL LLVM

https://reviews.llvm.org/D52558