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+/* Copyright 2018 The TensorFlow Authors. All Rights Reserved.
+
+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.
+==============================================================================*/
+
+#ifndef TENSORFLOW_CORE_GRAPPLER_OPTIMIZERS_DATA_NOOP_ELIMINATION_H_
+#define TENSORFLOW_CORE_GRAPPLER_OPTIMIZERS_DATA_NOOP_ELIMINATION_H_
+
+#include "tensorflow/core/grappler/optimizers/custom_graph_optimizer.h"
+
+namespace tensorflow {
+namespace grappler {
+
+// This class eliminates tf.data transformations such as `take(n)` (for n < 0),
+// `skip(0)`, or `repeat(1)`
+class NoOpElimination : public CustomGraphOptimizer {
+ public:
+ NoOpElimination() = default;
+ ~NoOpElimination() override = default;
+
+ string name() const override { return "noop_elimination"; };
+
+ Status Init(
+ const tensorflow::RewriterConfig_CustomGraphOptimizer* config) override {
+ return Status::OK();
+ }
+
+ Status Optimize(Cluster* cluster, const GrapplerItem& item,
+ GraphDef* output) override;
+
+ void Feedback(Cluster* cluster, const GrapplerItem& item,
+ const GraphDef& optimize_output, double result) override;
+};
+
+} // end namespace grappler
+} // end namespace tensorflow
+
+#endif // TENSORFLOW_CORE_GRAPPLER_OPTIMIZERS_DATA_NOOP_ELIMINATION_H_