/* for all arguments of root */
for (i = 1; i < curr->node_count; ++i) {
arg = curr->nodes[i];
argnr = get_irn_graph_nr(arg);
bitset_clear_all(arg_regs);
/* for all arguments of root */
for (i = 1; i < curr->node_count; ++i) {
arg = curr->nodes[i];
argnr = get_irn_graph_nr(arg);
bitset_clear_all(arg_regs);