irn->attr.block.graph_arr = NEW_ARR_D(ir_node *, obst, n_loc);
memset(irn->attr.block.graph_arr, 0, sizeof(ir_node*) * n_loc);
irn->attr.block.phis = NULL;
irn->attr.block.graph_arr = NEW_ARR_D(ir_node *, obst, n_loc);
memset(irn->attr.block.graph_arr, 0, sizeof(ir_node*) * n_loc);
irn->attr.block.phis = NULL;