ref: b44a95b8fbe1a524074dfcb96ee5efb89c9a1c9a 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; }