/* in a matured block we can immediately determine the phi arguments */
if (get_Block_matured(block)) {
int arity = get_irn_arity(block);
/* no predecessors: use unknown value */
if (arity == 0 && block == get_irg_start_block(get_irn_irg(block))) {
/* in a matured block we can immediately determine the phi arguments */
if (get_Block_matured(block)) {
int arity = get_irn_arity(block);
/* no predecessors: use unknown value */
if (arity == 0 && block == get_irg_start_block(get_irn_irg(block))) {