1 files changed, 25 insertions, 0 deletions
diff --git a/model-optimizer/extensions/middle/AddIsCyclicAttribute.py b/model-optimizer/extensions/middle/AddIsCyclicAttribute.py
new file mode 100644
index 000000000..c2616ad4d
--- /dev/null
+++ b/model-optimizer/extensions/middle/AddIsCyclicAttribute.py
@@ -0,0 +1,25 @@
+"""
+ Copyright (c) 2018 Intel Corporation
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+      http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+"""
+
+import networkx as nx
+from mo.middle.replacement import MiddleReplacementPattern
+
+
+class AddIsCyclicAttribute(MiddleReplacementPattern):
+    @staticmethod
+    def find_and_replace_pattern(graph: nx.MultiDiGraph):
+        is_acyclic = nx.is_directed_acyclic_graph(graph)
+        graph.graph['is_cyclic'] = not is_acyclic
+\ No newline at end of file