[PATCH] D148824: AMDGPU: Define sub-class of SGPR_64 for tail call return

[Sebastian Neubauer via Phabricator via llvm-commits]

sebastian-ne accepted this revision.
sebastian-ne added a comment.

`s[30:31]` is reserved for the return address anyway, so the compiler should never use it for tail calls (independent of if it is part of the CCR list or not). Excluding it from that list makes sense to me :)


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https://reviews.llvm.org/D148824