Implementation of stack.

PiperOrigin-RevId: 205763219

1 files changed, 8 insertions, 0 deletions

diff --git a/tensorflow/contrib/lite/toco/graph_transformations/propagate_array_data_types.cc b/tensorflow/contrib/lite/toco/graph_transformations/propagate_array_data_types.cc
index 3dda536ef7..9848d55c83 100644
--- a/tensorflow/contrib/lite/toco/graph_transformations/propagate_array_data_types.cc
+++ b/tensorflow/contrib/lite/toco/graph_transformations/propagate_array_data_types.cc
@@ -193,6 +193,14 @@ bool PropagateArrayDataTypes::Run(Model* model, std::size_t op_index) {
       SetDataTypeForAllOutputs(model, op, data_type);
       break;
     }
+    case OperatorType::kPack: {
+      const ArrayDataType data_type = model->GetArray(op->inputs[0]).data_type;
+      for (const auto& input : op->inputs) {
+        CHECK(data_type == model->GetArray(input).data_type);
+      }
+      SetDataTypeForAllOutputs(model, op, data_type);
+      break;
+    }
     default: {
       // These operators produce outputs with the same type as their 1st input
       CHECK_GT(op->inputs.size(), 0);