1 files changed, 48 insertions, 0 deletions
diff --git a/compiler/enco/core/src/Transforms/DeadBagElimination.h b/compiler/enco/core/src/Transforms/DeadBagElimination.h
new file mode 100644
index 000000000..87e03e8ac
--- /dev/null
+++ b/compiler/enco/core/src/Transforms/DeadBagElimination.h
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2018 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 __ENCO_TRANSFORM_DEAD_BAG_ELIMINATION_H__
+#define __ENCO_TRANSFORM_DEAD_BAG_ELIMINATION_H__
+
+#include "Code.h"
+#include "Pass.h"
+
+namespace enco
+{
+
+/**
+ * @brief Eliminate dead bags
+ *
+ * A bag is referred to as dead if it is neither input nor output, and has no read. If a bag is
+ * dead, it is unnecessary to updates its values as these values are never used.
+ *
+ * "eliminate_dead_bag" removes all the dead bags and its updaters from IR.
+ */
+void eliminate_dead_bag(enco::Code *code);
+
+struct DeadBagEliminationPass final : public Pass
+{
+  PASS_CTOR(DeadBagEliminationPass)
+  {
+    // DO NOTHING
+  }
+
+  void run(const SessionID &sess) const override { eliminate_dead_bag(code(sess)); }
+};
+
+} // namespace enco
+
+#endif // __ENCO_TRANSFORM_DEAD_BAG_ELIMINATION_H__