[PATCH] D28000: [X86] Implement -mfentry

[Sanjoy Das via Phabricator via llvm-commits]

sanjoy added a comment.

Can you please give some context about this:  what is `__fentry__`, `mcount`, their use cases, relevant specifications?

Also:  have you checked to see if some of this code can be shared with XRay?


https://reviews.llvm.org/D28000