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diff --git a/Source/JavaScriptCore/bytecode/MethodCallLinkInfo.h b/Source/JavaScriptCore/bytecode/MethodCallLinkInfo.h
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+++ b/Source/JavaScriptCore/bytecode/MethodCallLinkInfo.h
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+/*
+ * Copyright (C) 2012 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 MethodCallLinkInfo_h
+#define MethodCallLinkInfo_h
+
+#include "CodeLocation.h"
+#include "JITCode.h"
+#include "JITWriteBarrier.h"
+#include <wtf/Platform.h>
+
+namespace JSC {
+
+#if ENABLE(JIT)
+
+class RepatchBuffer;
+
+struct MethodCallLinkInfo {
+    MethodCallLinkInfo()
+        : seen(false)
+    {
+    }
+
+    bool seenOnce()
+    {
+        return seen;
+    }
+
+    void setSeen()
+    {
+        seen = true;
+    }
+        
+    void reset(RepatchBuffer&, JITCode::JITType);
+
+    unsigned bytecodeIndex;
+    CodeLocationCall callReturnLocation;
+    JITWriteBarrier<Structure> cachedStructure;
+    JITWriteBarrier<Structure> cachedPrototypeStructure;
+    // We'd like this to actually be JSFunction, but InternalFunction and JSFunction
+    // don't have a common parent class and we allow specialisation on both
+    JITWriteBarrier<JSObject> cachedFunction;
+    JITWriteBarrier<JSObject> cachedPrototype;
+    bool seen;
+};
+
+inline void* getMethodCallLinkInfoReturnLocation(MethodCallLinkInfo* methodCallLinkInfo)
+{
+    return methodCallLinkInfo->callReturnLocation.executableAddress();
+}
+
+inline unsigned getMethodCallLinkInfoBytecodeIndex(MethodCallLinkInfo* methodCallLinkInfo)
+{
+    return methodCallLinkInfo->bytecodeIndex;
+}
+
+#endif // ENABLE(JIT)
+
+} // namespace JSC
+
+#endif // MethodCallLinkInfo_h