ref: 63c625229ddae2be9785f8c9a0e4e5c5d2a6cb6c dir: /tests/execute/0018-structptr.c/
int main() { struct S { int x; int y; } s; struct S *p; p = &s; s.x = 1; p->y = 2; return p->y + p->x - 3; }