[PATCH] D64728: AMDGPU/GlobalISel: Don't constrain source register of VCC copies

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added a comment.

In D64728#1585640 <https://reviews.llvm.org/D64728#1585640>, @tstellar wrote:

> LGTM, do you think we'll need new register classes for the 32-bit boolean values?


Possibly, there are a lot of things to try for booleans


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https://reviews.llvm.org/D64728