[llvm] [LV] Stop using the legacy cost model for udiv + friends (PR #152707)

[Florian Hahn via llvm-commits]

fhahn wrote:

> I rebased just now and ran the tests in llvm/test/Transforms/LoopVectorize and they all pass fine with this PR.

I pulled the changes from the PR and rebased on current main and it crashed as expected. Not sure what the difference could be, is there any chance you have some other local changes? Could just update the PR to be on top of current main?

https://github.com/llvm/llvm-project/pull/152707