gcc/testsuite/gcc.c-torture/execute/alias-1.c

   1 int val;
   2
   3 int *ptr = &val;
   4 float *ptr2 = &val;
   5
   6 __attribute__((optimize ("-fno-strict-aliasing")))
   7 typepun ()
   8 {
   9   *ptr2=0;
  10 }
  11
  12 main()
  13 {
  14   *ptr=1;
  15   typepun ();
  16   if (*ptr)
  17     __builtin_abort ();
  18 }
  19