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diff --git a/cmdline/unit.h b/cmdline/unit.h
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+/*
+ * Copyright (C) 2015 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_CMDLINE_UNIT_H_
+#define ART_CMDLINE_UNIT_H_
+
+namespace art {
+
+// Used for arguments that simply indicate presence (e.g. "-help") without any values.
+struct Unit {
+  // Avoid 'Conditional jump or move depends on uninitialised value(s)' errors
+  // when running valgrind by specifying a user-defined constructor.
+  Unit() {}
+  ~Unit() {}
+  bool operator==(Unit) const {
+    return true;
+  }
+};
+
+}  // namespace art
+
+#endif  // ART_CMDLINE_UNIT_H_