case k_ir_loop : return "k_ir_loop";
case k_ir_compound_graph_path : return "k_ir_compound_graph_path";
case k_ir_extblk : return "k_ir_extblk";
case k_ir_loop : return "k_ir_loop";
case k_ir_compound_graph_path : return "k_ir_compound_graph_path";
case k_ir_extblk : return "k_ir_extblk";