https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83875
--- Comment #5 from Roland Schulz <roland at rschulz dot eu> ---
(In reply to Jakub Jelinek from comment #4)
> So we are essentially talking about a builtin like
> __builtin_cpu_{is,supports}, that instead of runtime check would query the
> target flags of the containing function (if any) or the compilation unit
> default (if outside of function).
Exactly.
