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

[David Sherwood via llvm-commits]

david-arm wrote:

> I think it would be good to fix #128061 before enabling, as without it we currently may compute incorrect bounds for early-exit loops, which in turn are used in `isDereferenceableAndAlignedInLoop`

Oh yeah sure, that makes absolute sense. That's on my list of PRs to review today!

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