[PATCH] D98515: [AMDGPU][GlobalISel] Stop foldInsertEltToCmpSelect from changing reg banks

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added a comment.

In D98515#2660982 <https://reviews.llvm.org/D98515#2660982>, @mbrkusanin wrote:

> %1:vgpr(s32) = COPY $sgpr0

I wonder if we should ban this in the verifier. It's not wrong, but it sure feels like bad form to allow cross bank copies involving physical registers


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