1 files changed, 52 insertions, 0 deletions
diff --git a/tensorflow/contrib/lite/toco/graph_transformations/resolve_slice_attributes.cc b/tensorflow/contrib/lite/toco/graph_transformations/resolve_slice_attributes.cc
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index 0000000000..1d0a2ec8f6
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+++ b/tensorflow/contrib/lite/toco/graph_transformations/resolve_slice_attributes.cc
@@ -0,0 +1,52 @@
+/* Copyright 2017 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 <memory>
+#include <string>
+#include <unordered_map>
+#include <vector>
+
+#include "tensorflow/contrib/lite/toco/graph_transformations/graph_transformations.h"
+#include "tensorflow/contrib/lite/toco/model.h"
+#include "tensorflow/contrib/lite/toco/tooling_util.h"
+#include "tensorflow/core/platform/logging.h"
+
+namespace toco {
+
+bool ResolveSliceAttributes::Run(Model* model, std::size_t op_index) {
+  const auto slice_it = model->operators.begin() + op_index;
+  auto* slice_op = slice_it->get();
+  if (slice_op->type != OperatorType::kSlice) return false;
+
+  auto* op = static_cast<SliceOperator*>(slice_op);
+  if (!op->begin.empty()) return false;
+
+  CHECK_EQ(op->inputs.size(), 3);
+  if (!IsConstantParameterArray(*model, op->inputs[1])) return false;
+  if (!IsConstantParameterArray(*model, op->inputs[2])) return false;
+
+  const auto& begin_array = *model->arrays[op->inputs[1]];
+  if (!begin_array.has_shape()) return false;
+
+  const auto& size_array = *model->arrays[op->inputs[2]];
+  if (!size_array.has_shape()) return false;
+
+  op->begin = begin_array.GetBuffer<ArrayDataType::kInt32>().data;
+  op->size = size_array.GetBuffer<ArrayDataType::kInt32>().data;
+
+  // TODO(dkalenichenko): Delete the extra inputs?
+
+  return true;
+}
+}  // namespace toco