[PATCH] D111219: [MachineCopyPropagation] Handle propagation of undef copies

[Carl Ritson via Phabricator via llvm-commits]

critson added a comment.

In D111219#3044995 <https://reviews.llvm.org/D111219#3044995>, @foad wrote:

> What happens if you don't do this? Does it fail machine verification? I wonder why this bug hasn't come to light earlier?

Correct, it fails machine verification.
I suspect this is just a case of no one has generated MIR like this before.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D111219/new/

https://reviews.llvm.org/D111219