https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80223
--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> --- E.g. if you have an application that is usually just busy waiting, waiting for something to happen, but you're not interested in profiling that function, or some function runs in a context where it is not safe to call into runtime support code.
