message: Simplify some code in grappler_item_builder.cc, no change in logic.
diff: @@ -315,27 +315,17 @@ std::unique_ptr<GrapplerItem> GrapplerItemFromMetaGraphDef(
  // We only do this if cfg.placeholder_unknown_output_shape_dim has
  // been set to avoid crashing non-BNMT graphs.
  if ((cfg.placeholder_unknown_output_shape_dim >= 0) &&
  - (shape.dims() == 0) && (node.attr().count("_output_shapes") == 1) &&
  - (node.attr().at("_output_shapes").list().shape(0).dim_size() != 0)) {
  + (shape.dims() == 0) && (node.attr().count("_output_shapes") == 1)) {
  + const auto& output_shapes =
  + node.attr().at("_output_shapes").list().shape(0);
  +
  + if (output_shapes.dim_size() != 0) {
  shape.Clear();
  shape_proto.clear_dim();
  - for (int dim_i = 0;
  - dim_i <
  - node.attr().at("_output_shapes").list().shape(0).dim_size();
  - dim_i++) {
  - const ::tensorflow::TensorShapeProto_Dim dim =
  - node.attr().at("_output_shapes").list().shape(0).dim(dim_i);
  - if (dim.size() == -1) {
  - shape.AddDim(cfg.placeholder_unknown_output_shape_dim);
  - shape_proto.add_dim()->set_size(
  - cfg.placeholder_unknown_output_shape_dim);
  - } else {
  - int size = node.attr()
  - .at("_output_shapes")
  - .list()
  - .shape(0)
  - .dim(dim_i)
  - .size();
  +
  + for (const auto& dim : output_shapes.dim()) {
  + auto size = dim.size();
  + if (size == -1) size = cfg.placeholder_unknown_output_shape_dim;
  shape.AddDim(size);
  shape_proto.add_dim()->set_size(size);
  }
  