new_in = get_inversion_copy(pred);
DB((dbg, LEVEL_5, "Extend block %N by %N cp of %N\n", block, new_in, pred));
extend_irn(block, new_in, false);
new_in = get_inversion_copy(pred);
DB((dbg, LEVEL_5, "Extend block %N by %N cp of %N\n", block, new_in, pred));
extend_irn(block, new_in, false);