https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126580
--- Comment #1 from Drea Pinski <pinskia at gcc dot gnu.org> --- Note -fallow-store-data-races is not needed in this case. f1 is handled in cselim (f is not; I don't know why though). f is handled on the RTL ifcvt level too.
