llvm-gcc-4.2/gcc/testsuite/gcc.dg/tree-ssa/vrp12.c

/* { dg-do link } */
/* { dg-options -O2 } */

foo (int i)
{
  int x;

  x = i;
  if (i < -10)
    {
      x = __builtin_abs (i);
      /* VRP was incorrectly folding this to if (1).  */
      if (x < 0)
	link_error ();
    }

  return x;
}

main()
{
  foo (-30);
}