[llvm] [LoopVectorize] Add initial support to VPRegionBlock for multiple successors (PR #108563)

[Ramkumar Ramachandra via llvm-commits]

https://github.com/artagnon commented:

Looks pretty good to me, except maybe that I wish it were generalized to multiple early exits.

https://github.com/llvm/llvm-project/pull/108563