[clang] [llvm] [AMDGPU] Add s_wakeup_barrier instruction for gfx1250 (PR #170501)

[Mirko Brkušanin via llvm-commits]

mbrkusanin wrote:

> Hmm, I'm still not sure why we wanted to remove it in the first place.

We only want it for gfx1250 not all of gfx12.

https://github.com/llvm/llvm-project/pull/170501