[llvm] [SampleFDO] Stale profile renaming matching (PR #92151)

[Lei Wang via llvm-commits]

https://github.com/wlei-llvm commented:

Thanks a ton for the awesome code review!

>There is no guarantee that these wrong matching can only happen in cold functions. I'm wondering if we should skip name matching attempt for tiny functions where don't have enough signal for high confidence matching.

Yeah, sounds good, I tried to skip using the checksum for tiny function ( the "magic" 5 num block..) we can apply the same to the general matching.





https://github.com/llvm/llvm-project/pull/92151