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diff --git a/Source/JavaScriptCore/yarr/YarrJIT.h b/Source/JavaScriptCore/yarr/YarrJIT.h
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+/*
+ * Copyright (C) 2009 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 YarrJIT_h
+#define YarrJIT_h
+
+#if ENABLE(YARR_JIT)
+
+#include "MacroAssembler.h"
+#include "UString.h"
+
+#if CPU(X86) && !COMPILER(MSVC)
+#define YARR_CALL __attribute__ ((regparm (3)))
+#else
+#define YARR_CALL
+#endif
+
+namespace JSC {
+
+class JSGlobalData;
+class ExecutablePool;
+
+namespace Yarr {
+
+class YarrCodeBlock {
+    typedef int (*YarrJITCode)(const UChar* input, unsigned start, unsigned length, int* output) YARR_CALL;
+
+public:
+    YarrCodeBlock()
+        : m_needFallBack(false)
+    {
+    }
+
+    ~YarrCodeBlock()
+    {
+    }
+
+    void setFallBack(bool fallback) { m_needFallBack = fallback; }
+    bool isFallBack() { return m_needFallBack; }
+    void set(MacroAssembler::CodeRef ref) { m_ref = ref; }
+
+    int execute(const UChar* input, unsigned start, unsigned length, int* output)
+    {
+        return reinterpret_cast<YarrJITCode>(m_ref.m_code.executableAddress())(input, start, length, output);
+    }
+
+#if ENABLE(REGEXP_TRACING)
+    void *getAddr() { return m_ref.m_code.executableAddress(); }
+#endif
+
+private:
+    MacroAssembler::CodeRef m_ref;
+    bool m_needFallBack;
+};
+
+} } // namespace JSC::Yarr
+
+#endif
+
+#endif // YarrJIT_h