llvm-gcc-4.2/gcc/testsuite/gcc.dg/torture/pr28814.c

/* { dg-do compile } */

struct w49
{
  union
  {
  }
  value;
};
f9887 (struct w49 a23040)
{
  unsigned long r9887;
  if (((struct structure_type24753 *) (r9887 - 1)) == ((void *) 0))
    {
      backtrace ("stalin.sc", 7222, 248274);
    }
}