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

   1 int val;
   2
   3 int *ptr = &val;
   4 float *ptr2 = (float *) &val;
   5
   6 __attribute__((optimize ("-fno-strict-aliasing")))
   7 void
   8 typepun (void)
   9 {
  10   *ptr2=0;
  11 }
  12
  13 int
  14 main(void)
  15 {
  16   *ptr=1;
  17   typepun ();
  18   if (*ptr)
  19     __builtin_abort ();
  20 }
  21