tree_tp = create_pointer (find_structure ("tree_node", 1));
mem_attrs_tp = create_pointer (find_structure ("mem_attrs", 0));
reg_attrs_tp = create_pointer (find_structure ("reg_attrs", 0));
tree_tp = create_pointer (find_structure ("tree_node", 1));
mem_attrs_tp = create_pointer (find_structure ("mem_attrs", 0));
reg_attrs_tp = create_pointer (find_structure ("reg_attrs", 0));