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

[Ruiling, Song via Phabricator via llvm-commits]

ruiling added a comment.

In D96980#2575164 <https://reviews.llvm.org/D96980#2575164>, @hliao wrote:

> That's the part I don't understand. Why code path is still executed when exec mask is 0? For the regular code by the compiler, exec mask 0 always results in branch away on that code path. There's even no chance to execute that. Could you elaborate on how a code path could be executed with exec mask 0?

`SIRemoveShortExecBranches.cpp` is one source of executing instructions when exec == 0. I am not sure if there are any others.


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  https://reviews.llvm.org/D96980/new/

https://reviews.llvm.org/D96980