[llvm] [mlir] [MLIR][AMDGPU] Adding dynamic size check to avoid subword buffer load (PR #135014)

[Krzysztof Drewniak via llvm-commits]

krzysz00 wrote:

Will give an actual review when properly awake but I wanted to flag that I really don't think the approach in the summary is the right one 

https://github.com/llvm/llvm-project/pull/135014