[llvm] [Matrix] Handle load/store with different AS in getNonAliasingPointer. (PR #188721)

[Florian Hahn via llvm-commits]

https://github.com/fhahn commented:

> The two notes are not so much issues with this change as with the pre-existing code.


Thanks, will address separately.

https://github.com/llvm/llvm-project/pull/188721