[llvm] [TRE] Adjust function entry count when using instrumented profiles (PR #143987)

[Mircea Trofin via llvm-commits]

mtrofin wrote:

> For my understanding: Is this a performance improvement? 

I could see some small improvements, yes.

> Otherwise I would expect the pass to just invalidate the analysis (as it doesn't seem to explicitely preserve it) forcing a recompute of BlockFrequencyInfo next time it is needed?

BFI won't update function entry count though.


https://github.com/llvm/llvm-project/pull/143987