[llvm] [SampleFDO] Improve stale profile matching by diff algorithm (PR #87375)

[via llvm-commits]

https://github.com/WenleiHe commented:

Thanks for the changes. Looking good overall and getting really close now.

I just wonder now that we rely on sequence match, do we still need to exclude indirect calls?  

https://github.com/llvm/llvm-project/pull/87375