1 files changed, 43 insertions, 0 deletions
diff --git a/tensorflow/contrib/framework/ops/variable_ops.cc b/tensorflow/contrib/framework/ops/variable_ops.cc
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+++ b/tensorflow/contrib/framework/ops/variable_ops.cc
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+/* Copyright 2016 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.
+==============================================================================*/
+
+#include "tensorflow/core/framework/common_shape_fns.h"
+#include "tensorflow/core/framework/op.h"
+
+namespace tensorflow {
+
+using shape_inference::InferenceContext;
+using shape_inference::Shape;
+
+REGISTER_OP("ZeroInitializer")
+    .Input("ref: Ref(T)")
+    .Output("output_ref: Ref(T)")
+    .Attr("T: realnumbertype")
+    .SetAllowsUninitializedInput()
+    .SetShapeFn([](InferenceContext* c) {
+        c->set_output(0, c->input(0));
+        return Status::OK();
+    })
+    .Doc(R"doc(
+Initialize 'ref' with all zeros. This op requires that the tensor is not
+initialized. The tensor will first be allocated memory, then be filled with all
+zeros. This op is intended to save memory during initialization,
+if you use this op, you should not run initializer of the 'ref' tensor.
+
+ref: Should be from a `Variable` node.
+output_ref:= Same as "ref".
+)doc");
+
+}  // namespace tensorflow