[PATCH] D74190: AMDGPU/GlobalISel: Split 64-bit G_CTPOP in RegBankSelect

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added a comment.

In D74190#1863365 <https://reviews.llvm.org/D74190#1863365>, @nhaehnle wrote:

> I would suggest adding a test for s16 ctpop. If that happens to just work, then great and LGTM.


s16 ctpop isn't legal, so the verifier will fail here. We could arguably make it legal with SDWA,


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