[llvm] [AsmPrint] Correctly factor function entry count when dumping MBB frequencies (PR #67826)

[Aiden Grossman via llvm-commits]

https://github.com/boomanaiden154 commented:

Looks good from my side.

Having the actual MBB frequencies (or as actual as they'll get after propagating through the compilation pipeine) will be nice for cost modelling applications. I've always found it interesting that MBFI doesn't return correct counts even relative to the function entry counts, but I guess that's a separate issue (or feature).

https://github.com/llvm/llvm-project/pull/67826