[llvm] [SCEV] Use willNotOverflow for AR-check in udiv (PR #217133)

[Nikita Popov via llvm-commits]

https://github.com/nikic requested changes to this pull request.

I don't think extending willNotOverflow() with "phi" support makes sense. This does not fit into the current meaning of the function (as there is no meaningful way in which a phi node can overflow).

https://github.com/llvm/llvm-project/pull/217133