1 files changed, 86 insertions, 0 deletions
diff --git a/compiler/moco-tf/src/Canonicalization/SqueezeCanonicalizer.cpp b/compiler/moco-tf/src/Canonicalization/SqueezeCanonicalizer.cpp
new file mode 100644
index 000000000..f5b991206
--- /dev/null
+++ b/compiler/moco-tf/src/Canonicalization/SqueezeCanonicalizer.cpp
@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2019 Samsung Electronics Co., Ltd. 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 "SqueezeCanonicalizer.h"
+
+#include <moco/IR/TFDialect.h>
+#include <moco/Support/TFShapeInferenceHelper.h>
+
+#include <moco/Log.h>
+
+namespace
+{
+
+bool canonicalize_squeeze_to_reshape(loco::Graph *graph, moco::TFSqueeze *node)
+{
+  LOGGER(l);
+
+  INFO(l) << "TFNodeCanonicalize TFSqueeze begin";
+
+  /**
+   * This will replace shape inferred TFSqueeze node into canonical FixedReshape
+   *
+   * Before
+   *           In ---- TFSqueeze ---- Out(s)
+   *
+   * After
+   *             ------ TFSqueeze
+   *            /
+   *           In ---- FixedReshape ----- Out(s)
+   */
+
+  auto nodeshape = moco::node_shape(node);
+  // canonicalize into FixedReshape is valid when squeeze has shape info
+  // TODO Support general Squeeze case
+  assert(nodeshape.domain() != loco::Domain::Unknown);
+
+  auto squeeze_tensor_shape = nodeshape.as<loco::TensorShape>();
+
+  // Create loco node to replace
+  auto reshape = graph->nodes()->create<loco::FixedReshape>();
+
+  // Copy shape
+  reshape->rank(squeeze_tensor_shape.rank());
+  for (uint32_t axis = 0; axis < squeeze_tensor_shape.rank(); ++axis)
+  {
+    assert(squeeze_tensor_shape.dim(axis).known());
+    reshape->dim(axis) = squeeze_tensor_shape.dim(axis);
+  }
+
+  // replace
+  auto in = node->input();
+  reshape->input(in);
+  replace(node).with(reshape);
+
+  INFO(l) << "TFNodeCanonicalize TFSqueeze done";
+
+  return true;
+}
+
+} // namespace
+
+namespace moco
+{
+namespace tf
+{
+
+bool SqueezeCanonicalizer::transform(TFSqueeze *node) const
+{
+  return canonicalize_squeeze_to_reshape(node->graph(), node);
+}
+
+} // namespace tf
+} // namespace moco