[llvm] [LV] Enable auto-vectorisation of loops with uncountable exits (PR #133099)

[Florian Hahn via llvm-commits]

https://github.com/fhahn commented:

I think it would be good to fix https://github.com/llvm/llvm-project/pull/128061 before enabling, as without it we currently may compute incorrect bounds for early-exit loops, which in turn are used in `isDereferenceableAndAlignedInLoop`

https://github.com/llvm/llvm-project/pull/133099