[llvm] [LoadStoreVectorizer] Postprocess and merge equivalence classes (PR #114501)

[Michal Paszkowski via llvm-commits]

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

Thank you for the review @arsenm, please post any other comments/suggestions or let me know if anything wasn't addressed.

The PR looks good to me. @v-klochkov does not have write access, I can merge the PR early next week (waiting in case there are any other comments).

https://github.com/llvm/llvm-project/pull/114501