[llvm] [Passes] Move LoopInterchange into optimization pipeline (PR #145503)

[Sjoerd Meijer via llvm-commits]

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

Okay, thanks, LGTM.

Like I said, the move makes sense, and it improves compile-times, so there is a lot to like here. 

I will leave it up to you if you want to merge this. I think you can, and even if we want to change things later, that won't be a lot of churn and I am expecting some anyway.  But again, up to you. 

https://github.com/llvm/llvm-project/pull/145503