gcc/testsuite/gcc.c-torture/execute/struct-aliasing-1.c

   1 struct S { float f; };
   2 int __attribute__((noinline))
   3 foo (int *r, struct S *p)
   4 {
   5   int *q = (int *)&p->f;
   6   int i = *q;
   7   *r = 0;
   8   return i + *q;
   9 }
  10 extern void abort (void);
  11 int main()
  12 {
  13   int i = 1;
  14   if (foo (&i, (struct S *)&i) != 1)
  15     abort ();
  16   return (0);
  17 }