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diff --git a/Source/JavaScriptCore/interpreter/ProtoCallFrame.h b/Source/JavaScriptCore/interpreter/ProtoCallFrame.h
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+++ b/Source/JavaScriptCore/interpreter/ProtoCallFrame.h
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+/*
+ * Copyright (C) 2013 Apple Inc. All Rights Reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef ProtoCallFrame_h
+#define ProtoCallFrame_h
+
+#include "Register.h"
+
+namespace JSC {
+
+struct ProtoCallFrame {
+    Register codeBlockValue;
+    Register calleeValue;
+    Register argCountAndCodeOriginValue;
+    Register thisArg;
+    uint32_t paddedArgCount;
+    bool arityMissMatch;
+    JSValue *args;
+
+    void init(CodeBlock*, JSObject*, JSValue, int, JSValue* otherArgs = 0);
+
+    CodeBlock* codeBlock() const { return codeBlockValue.Register::codeBlock(); }
+    void setCodeBlock(CodeBlock* codeBlock) { codeBlockValue = codeBlock; }
+
+    JSObject* callee() const { return calleeValue.Register::object(); }
+    void setCallee(JSObject* callee) { calleeValue = callee; }
+
+    int argumentCountIncludingThis() const { return argCountAndCodeOriginValue.payload(); }
+    int argumentCount() const { return argumentCountIncludingThis() - 1; }
+    void setArgumentCountIncludingThis(int count) { argCountAndCodeOriginValue.payload() = count; }
+    void setPaddedArgCount(uint32_t argCount) { paddedArgCount = argCount; }
+
+    void clearCurrentVPC() { argCountAndCodeOriginValue.tag() = 0; }
+    
+    JSValue thisValue() const { return thisArg.Register::jsValue(); }
+    void setThisValue(JSValue value) { thisArg = value; }
+
+    bool needArityCheck() { return arityMissMatch; }
+
+    JSValue argument(size_t argumentIndex)
+    {
+        ASSERT(static_cast<int>(argumentIndex) < argumentCount());
+        return args[argumentIndex];
+    }
+    void setArgument(size_t argumentIndex, JSValue value)
+    {
+        ASSERT(static_cast<int>(argumentIndex) < argumentCount());
+        args[argumentIndex] = value;
+    }
+};
+
+} // namespace JSC
+
+#endif // ProtoCallFrame_h