GCC has had this function attribute since GCC 7.1 for this purpose. I
added "no_profile" last week in D104475; rename this to
"no_profile_instrument_function" to improve compatibility with GCC.
Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80223#c11
Reviewed By: MaskRay, aaron.ballman
Differential Revision: https://reviews.llvm.org/D104658
Nick Desaulniers