[record-hessian] Introduce HessianObserver. (#14292)

This commit introduce hessian observer.

ONE-DCO-1.0-Signed-off-by: Banseok Lee <[email protected]>

compiler/record-hessian/include/record-hessian/HessianObserver.h

@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2024 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 __RECORD_HESSIAN_HESSIANOBSERVER_H__
+#define __RECORD_HESSIAN_HESSIANOBSERVER_H__
+
+#include "record-hessian/HessianComputer.h"
+
+#include <luci/IR/CircleNode.h>
+#include <luci_interpreter/Interpreter.h>
+
+#include <memory>
+
+namespace record_hessian
+{
+
+class HessianObserver : public luci_interpreter::ExecutionObserver
+{
+public:
+  HessianObserver() = default;
+
+  void postTensorWrite(const luci::CircleNode *node,
+                       const luci_interpreter::Tensor *tensor) override;
+
+  std::unique_ptr<HessianMap> hessianData() { return _hessian_computer.getMap(); }
+
+private:
+  HessianComputer _hessian_computer;
+};
+
+} // namespace record_hessian
+
+#endif // __RECORD_HESSIAN_HESSIANOBSERVER_H__

compiler/record-hessian/src/HessianObserver.cpp

@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2024 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 "record-hessian/HessianObserver.h"
+
+namespace record_hessian
+{
+
+void HessianObserver::postTensorWrite(const luci::CircleNode *node,
+                                      const luci_interpreter::Tensor *tensor)
+{
+  assert(node != nullptr);
+  assert(tensor != nullptr);
+
+  auto node_outputs = loco::succs(node);
+  for (auto node_output : node_outputs)
+  {
+    auto cur_node = dynamic_cast<luci::CircleNode *>(node_output);
+    if (cur_node == nullptr)
+    {
+      throw std::runtime_error("Record Hessian: node output shouldn't be null.");
+    }
+    // TODO : ADD TCONV/DepthCONV cases
+    if (cur_node->opcode() == luci::CircleOpcode::FULLY_CONNECTED ||
+        cur_node->opcode() == luci::CircleOpcode::CONV_2D)
+    {
+      _hessian_computer.recordHessian(cur_node, tensor);
+    }
+  }
+}
+
+} // namespace record_hessian