[Bug middle-end/48110] __attribute__ ((optimize(...))) version of -Ofast

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48110

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Indeed, not sure why we even support "3" or "s", but "fast" would certainly
alias with -fast ;)