[llvm] [AMDGPU] Add function attribute to disable TBUFFER combine (PR #156454)

[Krzysztof Drewniak via llvm-commits]

krzysz00 wrote:

> Is the suggestion to add an extra ME pass that merges tbuffers? load-store-vectorizer works on the regular load/stores, so it is not easily possible to get that working with tbuffer representation which has extra information (format) on the instruction.

Yeah - and you might want the same for buffer_load/buffer_store more generally, in theory?

https://github.com/llvm/llvm-project/pull/156454