void abort(void);
void exit(int);
struct baz {
    char a[17];
    char b[3];
    unsigned int c;
    unsigned int d;
};

void foo(struct baz *p, unsigned int c, unsigned int d) {
    __builtin_memcpy(p->b, "abc", 3);
    p->c = c;
    p->d = d;
}

void bar(struct baz *p, unsigned int c, unsigned int d) {
    ({ void *s = (p);
     __builtin_memset (s, '\0', sizeof (struct baz));
     s; });
    __builtin_memcpy(p->a, "01234567890123456", 17);
    __builtin_memcpy(p->b, "abc", 3);
    p->c = c;
    p->d = d;
}

int main() {
    struct baz p;
    foo(&p, 71, 18);
    if (p.c != 71 || p.d != 18)
        abort();
    bar(&p, 59, 26);
    if (p.c != 59 || p.d != 26)
        abort();
    exit(0);
}
