https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114050
--- Comment #18 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to Vincent Lefèvre from comment #17) > (In reply to Jonathan Wakely from comment #13) > > -fexcess-precision does affect constants. > > Indeed, and this is a bug, as -fexcess-precision=fast was not meant to make > general programs less accurate (but to possibly keep more precision > internally, avoiding costly conversions, even in cases where this is > forbidden). See bug 114746. No that is NOT true.