[moco-tf] Introduce TFStopGradient (#6715)

* [moco-tf] Introduce TFStopGradient

This will introduce TFStopGradient IR for TensorFlow StopGradient node and required codes

Signed-off-by: SaeHie Park <saehie.park@samsung.com>
* fix comment

diff --git a/compiler/moco-tf/src/Dialect/TFNodes.h b/compiler/moco-tf/src/Dialect/TFNodes.h
index ed6d5ca..3edd043 100644 (file)
--- a/compiler/moco-tf/src/Dialect/TFNodes.h
+++ b/compiler/moco-tf/src/Dialect/TFNodes.h
@@ -38,6 +38,7 @@
 #include "IR/TFSqrt.h"
 #include "IR/TFSquaredDifference.h"
 #include "IR/TFSqueeze.h"
+#include "IR/TFStopGradient.h"
 #include "IR/TFSub.h"
 
 #endif // __MOCO_TF_DIALECT_TFNODES_H__

diff --git a/compiler/moco-tf/src/Dialect/TFNodes.lst b/compiler/moco-tf/src/Dialect/TFNodes.lst
index 9e66014..d946cf0 100644 (file)
--- a/compiler/moco-tf/src/Dialect/TFNodes.lst
+++ b/compiler/moco-tf/src/Dialect/TFNodes.lst
@@ -28,4 +28,5 @@ TENSORFLOW_NODE(Softmax, TFSoftmax)
 TENSORFLOW_NODE(Sqrt, TFSqrt)
 TENSORFLOW_NODE(SquaredDifference, TFSquaredDifference)
 TENSORFLOW_NODE(Squeeze, TFSqueeze)
+TENSORFLOW_NODE(StopGradient, TFStopGradient)
 TENSORFLOW_NODE(Sub, TFSub)

diff --git a/compiler/moco-tf/src/IR/TFStopGradient.h b/compiler/moco-tf/src/IR/TFStopGradient.h
new file mode 100644 (file)
index 0000000..d39f14e
--- /dev/null
+++ b/compiler/moco-tf/src/IR/TFStopGradient.h
@@ -0,0 +1,55 @@
+/*
+ * 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_IR_TFSTOPGRADIENT_H__
+#define __MOCO_TF_IR_TFSTOPGRADIENT_H__
+
+#include "Dialect/TFNodeDecl.h"
+
+namespace moco
+{
+namespace tf
+{
+
+/// @note TFStopGradient corresponds to the following GraphDef
+/*
+node {
+  name: "StopGradient"
+  op: "StopGradient"
+  input: "Placeholder"
+  attr {
+    key: "T"
+    value {
+      type: DT_FLOAT
+    }
+  }
+}
+*/
+
+class TFStopGradient final : public loco::FixedArityNode<1, TFNodeImpl<TFOpcode::StopGradient>>
+{
+public:
+  TFStopGradient() = default;
+
+public:
+  Node *input(void) const { return at(0)->node(); }
+  void input(Node *node) { at(0)->node(node); }
+};
+
+} // namespace tf
+} // namespace moco
+
+#endif // __MOCO_TF_IR_TFSTOPGRADIENT_H__

diff --git a/compiler/moco-tf/src/IR/TFStopGradient.test.cpp b/compiler/moco-tf/src/IR/TFStopGradient.test.cpp
new file mode 100644 (file)
index 0000000..dafd1a5
--- /dev/null
+++ b/compiler/moco-tf/src/IR/TFStopGradient.test.cpp
@@ -0,0 +1,31 @@
+/*
+ * 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 "IR/TFStopGradient.h"
+
+#include "Dialect/TFDialect.h"
+
+#include <gtest/gtest.h>
+
+TEST(TFStopGradientTest, constructor)
+{
+  moco::tf::TFStopGradient node;
+
+  ASSERT_EQ(node.dialect(), moco::tf::TFDialect::get());
+  ASSERT_EQ(node.opcode(), moco::tf::TFOpcode::StopGradient);
+
+  ASSERT_EQ(node.input(), nullptr);
+}

diff --git a/compiler/moco-tf/src/Transforms/FixShapeTransform.cpp b/compiler/moco-tf/src/Transforms/FixShapeTransform.cpp
index 280e3e7..acea640 100644 (file)
--- a/compiler/moco-tf/src/Transforms/FixShapeTransform.cpp
+++ b/compiler/moco-tf/src/Transforms/FixShapeTransform.cpp
@@ -1600,6 +1600,13 @@ bool fix_shape(moco::tf::TFSqueeze *node)
   return true;
 }
 
+bool fix_shape(moco::tf::TFStopGradient *node)
+{
+  // Output shape is same as the input
+  auto input = node->input();
+  return copy_shapedata(input, node);
+}
+
 bool fix_shape(moco::tf::TFSub *node)
 {
   auto x = node->x();