diff --git a/src/compiler/dex/dataflow_iterator.h b/src/compiler/dex/dataflow_iterator.h
new file mode 100644
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+++ b/src/compiler/dex/dataflow_iterator.h
@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * 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 ART_SRC_COMPILER_DEX_DATAFLOW_ITERATOR_H_
+#define ART_SRC_COMPILER_DEX_DATAFLOW_ITERATOR_H_
+
+#include "compiler_ir.h"
+#include "mir_graph.h"
+
+namespace art {
+
+  class DataflowIterator {
+    public:
+      DataflowIterator(MIRGraph* mir_graph, DataFlowAnalysisMode dfa_mode, bool is_iterative);
+      ~DataflowIterator(){}
+
+      BasicBlock* Next(bool had_change);
+      BasicBlock* Next();
+
+    private:
+      // TODO: rework this class.
+      MIRGraph* mir_graph_;
+      DataFlowAnalysisMode mode_;
+      bool is_iterative_;
+      bool changed_;
+      int start_idx_;
+      int end_idx_;
+      int idx_;
+      bool reverse_;
+      GrowableList* block_id_list_;
+      GrowableListIterator all_nodes_iterator_;
+
+      BasicBlock* NextBody(bool had_change);
+
+  }; // DataflowIterator
+}  // namespace art
+
+#endif // ART_SRC_COMPILER_DEX_DATAFLOW_ITERATOR_H_