[llvm] Update amdgpu_gfx functions to use s0-s3 for inreg SGPR arguments on targets using scratch instructions for stack (PR #78553)

[Rajveer Singh Bharadwaj via llvm-commits]

Rajveer100 wrote:

> For clarity, I see this warning for all tests, i.e, I am unable to use any of those utility commands with the same issue as mentioned in the above comment.

@arsenm 
Can you let me know the cause for this?

https://github.com/llvm/llvm-project/pull/78553