[PATCH] D29850: [AArch64] Fix bug in AArch64RedundantCopyElimination removing COPYs it shouldn't.

[Geoff Berry via Phabricator via llvm-commits]

gberry abandoned this revision.
gberry added a comment.

Yeah, it looks like this was a false alarm.  I spot checked some of the cases that were leading to these COPYs and all of them were of the form:

  %vreg:sub_32<def,read-undef> = COPY %WZR

which don't expect to have the upper 32 bits cleared.


https://reviews.llvm.org/D29850