[PATCH] D74661: AMDGPU/GlobalISel: Insert readfirstlane on SGPR returns

[Nicolai Hähnle via Phabricator via llvm-commits]

nhaehnle requested changes to this revision.
nhaehnle added a comment.
This revision now requires changes to proceed.

Please remove the changes in the bswap test. It is critically important that we do not insert unnecessary v_readfirstlane insructions. Mesa performance leans on this quite heavily.


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  https://reviews.llvm.org/D74661/new/

https://reviews.llvm.org/D74661