https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70130
--- Comment #25 from Bill Schmidt <wschmidt at gcc dot gnu.org> --- I've verified the patch indeed fixes the test from c#11. Regstrap in progress. One nit: The parentheses in the proposed patch are slightly wrong, should be: && (LOOP_VINFO_VECT_FACTOR (loop_vinfo) * GROUP_SIZE (vinfo_for_stmt (GROUP_FIRST_ELEMENT (stmt_info))) % TYPE_VECTOR_SUBPARTS (vectype) != 0))