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diff --git a/runtime/dex_instruction_visitor.h b/runtime/dex_instruction_visitor.h
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+/*
+ * Copyright (C) 2011 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_DEX_INSTRUCTION_VISITOR_H_
+#define ART_SRC_DEX_INSTRUCTION_VISITOR_H_
+
+#include "base/macros.h"
+#include "dex_instruction.h"
+
+namespace art {
+
+template<typename T>
+class DexInstructionVisitor {
+ public:
+  void Visit(const uint16_t* code, size_t size_in_bytes) {
+    T* derived = static_cast<T*>(this);
+    size_t size_in_code_units = size_in_bytes / sizeof(uint16_t);
+    size_t i = 0;
+    while (i < size_in_code_units) {
+      const Instruction* inst = Instruction::At(&code[i]);
+      switch (inst->Opcode()) {
+#define INSTRUCTION_CASE(o, cname, p, f, r, i, a, v)  \
+        case Instruction::cname: {                    \
+          derived->Do_ ## cname(inst);                \
+          break;                                      \
+        }
+#include "dex_instruction_list.h"
+        DEX_INSTRUCTION_LIST(INSTRUCTION_CASE)
+#undef DEX_INSTRUCTION_LIST
+#undef INSTRUCTION_CASE
+        default:
+          CHECK(false);
+      }
+      i += inst->SizeInCodeUnits();
+    }
+  }
+
+ private:
+  // Specific handlers for each instruction.
+#define INSTRUCTION_VISITOR(o, cname, p, f, r, i, a, v)    \
+  void Do_ ## cname(const Instruction* inst) {             \
+    T* derived = static_cast<T*>(this);                    \
+    derived->Do_Default(inst);                             \
+  }
+#include "dex_instruction_list.h"
+  DEX_INSTRUCTION_LIST(INSTRUCTION_VISITOR)
+#undef DEX_INSTRUCTION_LIST
+#undef INSTRUCTION_VISITOR
+
+  // The default instruction handler.
+  void Do_Default(const Instruction*) {
+    return;
+  }
+};
+
+
+}  // namespace art
+
+#endif  // ART_SRC_DEX_INSTRUCTION_VISITOR_H_