/* Invoke itself on modified loops. */
tree_unswitch_single_loop (loops, nloop, num + 1);
tree_unswitch_single_loop (loops, loop, num + 1);
/* Invoke itself on modified loops. */
tree_unswitch_single_loop (loops, nloop, num + 1);
tree_unswitch_single_loop (loops, loop, num + 1);