struct S { float f; }; int __attribute__((noinline)) foo (int *r, struct S *p) { int *q = (int *)&p->f; int i = *q; *r = 0; return i + *q; } extern void abort (void); int main() { int i = 1; if (foo (&i, (struct S *)&i) != 1) abort (); return (0); }