[clang] [llvm] [mlir] [AMDGPU] Generalize global.load.lds to buffer fat pointers (PR #134911)

[Krzysztof Drewniak via cfe-commits]

krzysz00 wrote:

@arsenm 

Ok, so

1. Forcing the global intrinsic into covering buffers is out per 1:1 rules but
2. Per your comments on the previous PR, a new intrinsic for p7 is also out - or were you just objecting to the naming?
3. We can't just reuse the intrinsic on p8 (buffer resources) - it has the wrong type

So ... what am I supposed to do here? Is the call for a `amdgcn.load.lds.p{1,7}` that desugars?

https://github.com/llvm/llvm-project/pull/134911