https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107090
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to vfdff from comment #2) > Thanks for your suggestion. > > As the combine pass can't address more than 4 sequence insns, which pass may > be more suitable to match the huge pattern after fixing the 1st issue. match.pd can handle more than 4 gimple statement to do the matching.