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

[Mircea Trofin via llvm-commits]

mtrofin wrote:

Come to think of it, maybe a possibility is to use the BFI of the loop header before the transformation and calculate the BPI to preserve it.

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