[llvm] [SLU][profcheck] Estimate branch weights in partial unswitch cases (PR #164035)

[Mircea Trofin via llvm-commits]

mtrofin wrote:

### Merge activity

* **Oct 30, 5:35 PM UTC**: A user started a stack merge that includes this pull request via [Graphite](https://app.graphite.dev/github/pr/llvm/llvm-project/164035).


https://github.com/llvm/llvm-project/pull/164035