https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101210
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> --- It should match what the FE is doing, and it uses if (TREE_CODE (stmt) == INTEGER_CST && TYPE_REF_P (TREE_TYPE (stmt)) && (flag_sanitize & (SANITIZE_NULL | SANITIZE_ALIGNMENT)) && !wtd->no_sanitize_p)