[llvm] [PGO] Supporting code for always instrumenting loop entries (PR #116789)

[Christian Ulmann via llvm-commits]

https://github.com/Dinistro commented:

Nice work 🙂 
Dropped one more nit comment. Apart from this, this should be ready for a review of owners/maintainers of the PGO infra. 

https://github.com/llvm/llvm-project/pull/116789