[llvm-branch-commits] [llvm] AMDGPU: Add a subtarget feature for fine-grained remote memory support (PR #96442)

[Matt Arsenault via llvm-branch-commits]

arsenm wrote:

> Actually not, we do not know the bus. Moreover, we know this is opposite.

On gfx940/gfx12, we don't need to know the bus to handle the agent scope case correctly. The instructions still function, just always at device scope. We do need to know the bus and/or location to handle the system scope correctly, which will come from the new metadata.

https://github.com/llvm/llvm-project/pull/96442