Ignore args and kwargs for defun's get_concrete_fn if `PolymorphicFunction` was created

with an input_signature.

PiperOrigin-RevId: 216253122

2 files changed, 18 insertions, 5 deletions

diff --git a/tensorflow/python/eager/function.py b/tensorflow/python/eager/function.py
index 99bf375ea7..ff138cad1e 100644
--- a/tensorflow/python/eager/function.py
+++ b/tensorflow/python/eager/function.py
@@ -665,6 +665,11 @@ class Function(object):
     return self._build_call_outputs(outputs)
 
   @property
+  def name(self):
+    """Function name."""
+    return self._inference_function.name
+
+  @property
   def graph(self):
     """Returns the graph from which this function was constructed."""
     return self._func_graph
@@ -721,6 +726,10 @@ class Function(object):
     return nest.map_structure(lambda x: x.dtype if x is not None else None,
                               self._func_graph.structured_outputs)
 
+  def add_to_graph(self, g):
+    """Adds this function into the graph g."""
+    return self._inference_function.add_to_graph(g)
+
   def _construct_backprop_function(self):
     """Constructs the backprop function object for this function."""
     backwards_graph = FuncGraph(_backward_name(self._func_graph.name))
@@ -1133,6 +1142,8 @@ class PolymorphicFunction(object):
       *args: inputs to specialize on.
       **kwargs: inputs to specialize on.
     """
+    if self._input_signature:
+      args, kwargs = None, None
     graph_function, _ = self._maybe_define_function(args, kwargs)
     return graph_function
 
@@ -1322,6 +1333,9 @@ def register(func, *args, **kwargs):
   function definition into graph. Register function with different input param
   will result into multiple version of functions registered in graph.
 
+  Also, `args` and `kwargs` are ignored if this `PolymorphicFunction` was
+  created with an `input_signature`.
+
   Args:
     func: the PolymorphicFunction instance that generated by a @defun
     *args: input arguments for the Python function.
diff --git a/tensorflow/python/eager/function_test.py b/tensorflow/python/eager/function_test.py
index e46bde098b..953f4300cf 100644
--- a/tensorflow/python/eager/function_test.py
+++ b/tensorflow/python/eager/function_test.py
@@ -1841,11 +1841,10 @@ class FunctionTest(test.TestCase):
         # pylint: disable=protected-access
         self.assertEqual(len(graph._functions), 3)
 
-        # Test input param shape mismatch
-        t2 = constant_op.constant([[1.0, 2.0, 3.0], [4.0, 5.0, 6.0]])
-        with self.assertRaisesRegexp(
-            ValueError, 'Python inputs incompatible with input_signature'):
-          function.register(defun_matmul, t2, t2)
+        # Test register function with cache, note inputs are ignored.
+        function.register(defun_matmul)
+        graph = ops.get_default_graph()
+        self.assertEqual(len(graph._functions), 3)
 
   def testRegisterFunctionWithCache(self):
     def matmul(x, y):