[moco-tf] Support TFSoftmax Canonicalization (#6672)

* [moco-tf] Support TFSoftmax Canonicalization

This commit will enable TFSoftmax Canonicalization

Signed-off-by: Seok NamKoong <sk.namkoong@samsung.com>
* remove comment

diff --git a/compiler/moco-tf/src/Canonicalization/SoftmaxCanonicalizer.cpp b/compiler/moco-tf/src/Canonicalization/SoftmaxCanonicalizer.cpp
new file mode 100644 (file)
index 0000000..3b5043f
--- /dev/null
+++ b/compiler/moco-tf/src/Canonicalization/SoftmaxCanonicalizer.cpp
@@ -0,0 +1,99 @@
+/*
+ * 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 "SoftmaxCanonicalizer.h"
+
+#include "Annotations/ShapeInferenceData.h"
+
+#include "Dialect/TFDialect.h"
+#include "Dialect/TFNodes.h"
+#include "Dialect/TFNodeVisitor.h"
+#include "Dialect/TFNodeImpl.h"
+
+#include <moco/Log.h>
+
+namespace
+{
+
+bool canonicalize_softmax(loco::Graph *graph, moco::tf::TFSoftmax *node)
+{
+  LOGGER(l);
+
+  INFO(l) << "TFNodeCanonicalize TFSoftmax begin";
+
+  /**
+  * This will replace shape inferred TFSoftmax node into canonical TensorSoftmax
+  *
+  * Before
+  *           In ---- TFSoftmax ---- Out(s)
+  *
+  * After
+  *             ------ TFSoftmax
+  *            /
+  *           In ---- TensorSoftmax ----- Out(s)
+  */
+
+  auto softmax_shape = node->annot<moco::tf::ShapeInferenceData>();
+
+  // Canonicalization into TensorSoftmax is valid when softmax has shape info
+  assert(softmax_shape);
+
+  auto softmax_tensor_shape = softmax_shape->tensor_shape();
+
+  // Create loco node to replace
+  auto softmax = graph->nodes()->create<loco::TensorSoftmax>();
+
+  // replace
+  auto in = node->logits();
+  softmax->input(in);
+  softmax->axis(softmax_tensor_shape.rank() - 1);
+  replace(node).with(softmax);
+
+  INFO(l) << "TFNodeCanonicalize TFSoftmax done";
+
+  return true;
+}
+
+} // namespace
+
+namespace moco
+{
+namespace tf
+{
+
+bool SoftmaxCanonicalizer::run(loco::Graph *graph)
+{
+  auto active_nodes = loco::active_nodes(loco::output_nodes(graph));
+  bool changed = false;
+
+  for (auto node : active_nodes)
+  {
+    if (node->dialect() == TFDialect::get())
+    {
+      auto tf_softmax = dynamic_cast<moco::tf::TFSoftmax *>(node);
+      if (tf_softmax != nullptr)
+      {
+        if (canonicalize_softmax(graph, tf_softmax))
+          changed = true;
+      }
+    }
+  }
+
+  return changed;
+}
+
+} // namespace tf
+} // namespace moco

diff --git a/compiler/moco-tf/src/Canonicalization/SoftmaxCanonicalizer.h b/compiler/moco-tf/src/Canonicalization/SoftmaxCanonicalizer.h
new file mode 100644 (file)
index 0000000..6debf41
--- /dev/null
+++ b/compiler/moco-tf/src/Canonicalization/SoftmaxCanonicalizer.h
@@ -0,0 +1,44 @@
+/*
+ * 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.
+ */
+
+#ifndef __MOCO_TF_SOFTMAX_CANONICALIZER_H__
+#define __MOCO_TF_SOFTMAx_CANONICALIZER_H__
+
+#include "Transform.h"
+
+#include <loco.h>
+
+namespace moco
+{
+namespace tf
+{
+
+/**
+* @brief Canonicalize TF-dialect TFSoftmax into canonical Softmax node
+*/
+class SoftmaxCanonicalizer : public Transform
+{
+public:
+  const char *name(void) const final { return "SoftmaxCanonicalizer"; }
+
+public:
+  bool run(loco::Graph *graph) override;
+};
+
+} // namespace tf
+} // namespace moco
+
+#endif // __MOCO_TF_SOFTMAX_CANONICALIZER_H__

diff --git a/compiler/moco-tf/src/Canonicalizer.cpp b/compiler/moco-tf/src/Canonicalizer.cpp
index f33a2f5..163424e 100644 (file)
--- a/compiler/moco-tf/src/Canonicalizer.cpp
+++ b/compiler/moco-tf/src/Canonicalizer.cpp
@@ -34,6 +34,7 @@
 #include "Canonicalization/ReluCanonicalizer.h"
 #include "Canonicalization/Relu6Canonicalizer.h"
 #include "Canonicalization/ReshapeCanonicalizer.h"
+#include "Canonicalization/SoftmaxCanonicalizer.h"
 #include "Canonicalization/SqrtCanonicalizer.h"
 #include "Canonicalization/SquaredDifferenceCanonicalizer.h"
 #include "Canonicalization/SqueezeCanonicalizer.h"
@@ -91,6 +92,7 @@ void Canonicalizer::canonicalize(loco::Graph *g) const
   phase.emplace_back(stdex::make_unique<ReluCanonicalizer>());
   phase.emplace_back(stdex::make_unique<Relu6Canonicalizer>());
   phase.emplace_back(stdex::make_unique<ReshapeCanonicalizer>());
+  phase.emplace_back(stdex::make_unique<SoftmaxCanonicalizer>());
   phase.emplace_back(stdex::make_unique<SqrtCanonicalizer>());
   phase.emplace_back(stdex::make_unique<SquaredDifferenceCanonicalizer>());
   phase.emplace_back(stdex::make_unique<SqueezeCanonicalizer>());