set_extra_mod_helper
set_extra_mod_helper(left_name, left_sym, left, left_sm->state);
set_extra_mod_helper(other_name, other_sym, NULL, other_sm->state);
set_extra_mod_helper(member_name, sym, member_expr, new);
set_extra_mod_helper(name, sym, expr, state);
set_extra_mod_helper(new_name, new_sym, NULL, state);
void set_extra_mod_helper(const char *name, struct symbol *sym, struct expression *expr, struct smatch_state *state);