[llvm] [AMDGPU] Introduce ordering parameter to atomic intrinsics and introduce new llvm.amdgcn.image.atomic.load intrinsic. (PR #73613)

[Matt Arsenault via llvm-commits]

https://github.com/arsenm commented:

I'm wondering if we should encode the ordering with metadata or something better than an integer 

https://github.com/llvm/llvm-project/pull/73613