expr_derive_ptr_type
return build_op(ADDR, sys, expr_derive_ptr_type(tn->tn_type),
ln = convert(NOOP, 0, expr_derive_ptr_type(gettyp(VOID)), ln);
type_t *ptr_tp = expr_derive_ptr_type(rn->tn_type);
expr_derive_ptr_type(tn->tn_type->t_subt), tn, NULL);