- { "normal" , set_irn_n, get_irn_first, get_irn_arity, get_irn_n },
- { "block succs", NULL, get_zero, get_irn_arity, get_block_n },
- { "dependency", set_irn_dep, get_zero, get_irn_deps, get_irn_dep }
+ { "normal" , set_irn_n, -1, get_irn_arity, get_irn_n },
+ { "block succs", NULL, 0, get_irn_arity, get_block_n },
+ { "dependency", set_irn_dep, 0, get_irn_deps, get_irn_dep }