[llvm] [AMDGPU][Verifier] Limit kill/wqm.demote intrinsics to PS shaders (PR #151922)

[Carl Ritson via llvm-commits]

perlfu wrote:

> We should be generalizing kill support. In particular this should work in callable functions. Restricting to a specific entry point is bad

Is there a use case for generalizing it?
Ostensibly it exists to implement discard in PS shaders -- I have not seen a use case outside that.
At a low level it does work in other calling conventions at present, but I don't know if we want to maintain that.



https://github.com/llvm/llvm-project/pull/151922