[PATCH] D96980: [amdgpu] Revert agnostic SGPR spill.

[Carl Ritson via Phabricator via llvm-commits]

critson added a comment.

In D96980#2602610 <https://reviews.llvm.org/D96980#2602610>, @sebastian-ne wrote:

> I think I found a way how exec can get zero before a restore (disclaimer: I’m not sure if that is valid code in any of the graphics APIs or if something similar can happen in compute. It should be valid LLVM IR, however).
> ... code example omitted...

I agree this could happen if we use function calls in pixel shaders (PS); however, I don't think we have any plans to do this yet?
(Currently the only expected place for a kill is in PS, although we do support it elsewhere.)


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https://reviews.llvm.org/D96980