set_irg_visited(current_ir_graph, get_irg_visited(current_ir_graph)-1);
irg_walk(get_irg_end_reg(current_ir_graph), clear_link, collect_node, current_ir_graph);
set_irg_visited(current_ir_graph, get_irg_visited(current_ir_graph)-1);
irg_walk(get_irg_end_except(current_ir_graph), clear_link, collect_node, current_ir_graph);
set_irg_visited(current_ir_graph, get_irg_visited(current_ir_graph)-1);
irg_walk(get_irg_end_reg(current_ir_graph), clear_link, collect_node, current_ir_graph);
set_irg_visited(current_ir_graph, get_irg_visited(current_ir_graph)-1);
irg_walk(get_irg_end_except(current_ir_graph), clear_link, collect_node, current_ir_graph);