directory.

  Raises:
    ValueError iff the graph does not contain a valid signature or the file
    prefix tensor is not found in the graph.
  """
  create_empty_output_dir(output_dir)
  v1_builder = builder.SavedModelBuilder(output_dir)

  graph_def = _restore_output_tensor_names(graph_def)
  with session.Session(graph=ops.Graph()) as sess:
    importer.import_graph_def(graph_def, name='')

      function.

  Raises:
    FileExistsError: Iff `output_dir` is not empty and `overwrite` is false.
  """
  dir_not_empty = (
      output_dir is not None
      and file_io.file_exists_v2(output_dir)
      and file_io.list_directory_v2(output_dir)
  )

  if dir_not_empty and not overwrite:
    raise FileExistsError(

        // [(replica:0,core:0), (replica:1,core:0), ...,
        //  (replica:0,core:1), (replica:1,core:1), ...]
        uint64_t output_id =
            core_id * num_replicas + replica_id + results.size();
        result.replaceAllUsesWith(replicate_op.getResult(output_id));
      }
    }

    // Assume all the replicas have the same structure.
    mlir::TF::TPUPartitionedOutputV2Op first_op = *(ops.begin());

				panic("internal error: a.output not set")
			}
			outputID, _, err := c.Put(a.actionID, r)
			r.Close()
			if err == nil && cfg.BuildX {
				sh.ShowCmd("", "%s # internal", joinUnambiguously(str.StringList("cp", target, c.OutputFile(outputID))))
			}
			if b.NeedExport {
				if err != nil {
					return err
				}
				a.Package.Export = c.OutputFile(outputID)
				a.Package.BuildID = a.buildID
			}
		}
	}

		}

		c := cache.Default()
		outputID, _, err := c.Put(a.actionID, r)
		r.Close()
		if err != nil {
			return fmt.Errorf("error adding target to cache: %w", err)
		}
		if cfg.BuildX {
			sh.ShowCmd("", "%s # internal", joinUnambiguously(str.StringList("cp", a.Target, c.OutputFile(outputID))))
		}
	}

	return nil
}