[llvm] [SampleProfileMatcher] Skip orphan function stale profile matching if previously matched (PR #197781)

[Grigory Pastukhov via llvm-commits]

grigorypas wrote:

Do I understand correctly that stale profile matching will not run on orphaned functions? I think we should re-design data structure instead. Right now we map profile probe to IR probe. I wonder if we can reverse that and map IR probe to profile prob allowing many to one mapping.   

https://github.com/llvm/llvm-project/pull/197781