https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70771
--- Comment #2 from amker at gcc dot gnu.org --- Also like PR70775, this case failed the change allows single argument PHIs in if-cvt now. It looks like there is something wrong when handling single argument PHIs. Before the change, we simple return false in ifcvt_convertible_phi_p and skip if-conversion for such form loops.
