[llvm] [LoopInterchange] Constrain number of load/stores in a loop (PR #118973)

[Sjoerd Meijer via llvm-commits]

https://github.com/sjoerdmeijer approved this pull request.

As I wrote earlier, I think the idea makes sense, so this LGTM.

I have left 2 nits about debug/remark messages, but they can addressed without another review.

Please wait a day before merging this to give others a last change to comment. 

https://github.com/llvm/llvm-project/pull/118973