Add a tag constant, gpu, to present graph with GPU support.

PiperOrigin-RevId: 161242660

2 files changed, 18 insertions, 1 deletions

diff --git a/tensorflow/python/saved_model/saved_model_test.py b/tensorflow/python/saved_model/saved_model_test.py
index fcd6bc3954..5639e6855d 100644
--- a/tensorflow/python/saved_model/saved_model_test.py
+++ b/tensorflow/python/saved_model/saved_model_test.py
@@ -207,6 +207,13 @@ class SavedModelTest(test.TestCase):
       self._init_and_validate_variable(sess, "v", 43)
       builder.add_meta_graph([tag_constants.SERVING])
 
+    # Graph that updates the single variable. SavedModel invoked to:
+    # - simply add the model (weights are not updated).
+    # - multiple tags (from predefined constants).
+    with self.test_session(graph=ops.Graph()) as sess:
+      self._init_and_validate_variable(sess, "v", 45)
+      builder.add_meta_graph([tag_constants.SERVING, tag_constants.GPU])
+
     # Graph that updates the single variable. SavedModel is invoked:
     # - to add the model (weights are not updated).
     # - multiple custom tags.
@@ -230,6 +237,13 @@ class SavedModelTest(test.TestCase):
       self.assertEqual(
           42, ops.get_collection(ops.GraphKeys.GLOBAL_VARIABLES)[0].eval())
 
+    # Restore the graph with multiple predefined tags whose variables were not
+    # saved.
+    with self.test_session(graph=ops.Graph()) as sess:
+      loader.load(sess, [tag_constants.SERVING, tag_constants.GPU], export_dir)
+      self.assertEqual(
+          42, ops.get_collection(ops.GraphKeys.GLOBAL_VARIABLES)[0].eval())
+
     # Restore the graph with multiple tags. Provide duplicate tags to test set
     # semantics.
     with self.test_session(graph=ops.Graph()) as sess:
diff --git a/tensorflow/python/saved_model/tag_constants.py b/tensorflow/python/saved_model/tag_constants.py
index 4fb9645dea..52868bdf99 100644
--- a/tensorflow/python/saved_model/tag_constants.py
+++ b/tensorflow/python/saved_model/tag_constants.py
@@ -28,9 +28,12 @@ SERVING = "serve"
 # Tag for the `training` graph.
 TRAINING = "train"
 
+# Tag for the `gpu` graph.
+GPU = "gpu"
 
 _allowed_symbols = [
     "SERVING",
-    "TRAINING"
+    "TRAINING",
+    "GPU"
 ]
 remove_undocumented(__name__, _allowed_symbols)