[llvm] [sroa][profcheck] Vector selects have "unknown" branch weights (PR #163319)

[Mircea Trofin via llvm-commits]

mtrofin wrote:

### Merge activity

* **Oct 15, 12:34 AM UTC**: A user started a stack merge that includes this pull request via [Graphite](https://app.graphite.dev/github/pr/llvm/llvm-project/163319).


https://github.com/llvm/llvm-project/pull/163319