[llvm] AMDGPU: Remove flat/global fmin/fmax intrinsics (PR #105642)

[Diana Picus via llvm-commits]

rovka wrote:

> @arsenm I am not ok with the removal of these intrinsics that allow direct call to some of these atomics. I think you should keep them while you still do the changes that you want with the other atomicrmw. Your change is not backwards compatible. It is not yet clear to me if calling create atomicrmw is equivalent to calling the old intrisincs.

@doru1004 Can you please provide an example use case where it's not clear how to use atomicrmw to replace the old intrinsics? Then maybe we can add something to the docs or at least commit message to clarify.

https://github.com/llvm/llvm-project/pull/105642