[clang] [llvm] [AMDGPU] Asynchronous loads from global/buffer to LDS on pre-GFX12 (PR #180466)

[Sameer Sahasrabuddhe via cfe-commits]

ssahasra wrote:

> No issues I can see (strong approve on the buffer fat pointer lowering and on everything that's adding cases to conditionals, not much to say otherwise)

Thanks @krzysz00. If no other comments show up about the implementation itself, I intend to submit this tonight (roughly 8 hours from now).

https://github.com/llvm/llvm-project/pull/180466