[llvm] [LV] Always emit branch weights for vector epilogue (PR #155437)

[Florian Hahn via llvm-commits]

https://github.com/fhahn approved this pull request.

> You can see in BlockFrequencyInfoImpl::calculate that we seem to calculate most of the info even if the function does not have profile data. The only thing we miss out on is the iterative inference.

Sounds good!

LGTM, thanks!

https://github.com/llvm/llvm-project/pull/155437