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diff --git a/Source/JavaScriptCore/wtf/Compiler.h b/Source/JavaScriptCore/wtf/Compiler.h
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+/*
+ * Copyright (C) 2011 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 WTF_Compiler_h
+#define WTF_Compiler_h
+
+/* COMPILER() - the compiler being used to build the project */
+#define COMPILER(WTF_FEATURE) (defined WTF_COMPILER_##WTF_FEATURE  && WTF_COMPILER_##WTF_FEATURE)
+
+/* COMPILER_SUPPORTS() - whether the compiler being used to build the project supports the given feature. */
+#define COMPILER_SUPPORTS(WTF_COMPILER_FEATURE) (defined WTF_COMPILER_SUPPORTS_##WTF_COMPILER_FEATURE  && WTF_COMPILER_SUPPORTS_##WTF_COMPILER_FEATURE)
+
+/* ==== COMPILER() - the compiler being used to build the project ==== */
+
+/* COMPILER(CLANG) - Clang  */
+#if defined(__clang__)
+#define WTF_COMPILER_CLANG 1
+
+#ifndef __has_extension
+#define __has_extension __has_feature /* Compatibility with older versions of clang */
+#endif
+
+/* Specific compiler features */
+#define WTF_COMPILER_SUPPORTS_CXX_VARIADIC_TEMPLATES __has_feature(cxx_variadic_templates)
+#define WTF_COMPILER_SUPPORTS_CXX_RVALUE_REFERENCES __has_feature(cxx_rvalue_references)
+#define WTF_COMPILER_SUPPORTS_CXX_DELETED_FUNCTIONS __has_feature(cxx_deleted_functions)
+#define WTF_COMPILER_SUPPORTS_CXX_NULLPTR __has_feature(cxx_nullptr)
+#define WTF_COMPILER_SUPPORTS_BLOCKS __has_feature(blocks)
+
+#endif
+
+/* COMPILER(MSVC) - Microsoft Visual C++ */
+/* COMPILER(MSVC7_OR_LOWER) - Microsoft Visual C++ 2003 or lower*/
+/* COMPILER(MSVC9_OR_LOWER) - Microsoft Visual C++ 2008 or lower*/
+#if defined(_MSC_VER)
+#define WTF_COMPILER_MSVC 1
+#if _MSC_VER < 1400
+#define WTF_COMPILER_MSVC7_OR_LOWER 1
+#elif _MSC_VER < 1600
+#define WTF_COMPILER_MSVC9_OR_LOWER 1
+#endif
+
+/* Specific compiler features */
+#if _MSC_VER >= 1600
+#define WTF_COMPILER_SUPPORTS_CXX_NULLPTR 1
+#endif
+
+#endif
+
+/* COMPILER(RVCT) - ARM RealView Compilation Tools */
+/* COMPILER(RVCT4_OR_GREATER) - ARM RealView Compilation Tools 4.0 or greater */
+#if defined(__CC_ARM) || defined(__ARMCC__)
+#define WTF_COMPILER_RVCT 1
+#define RVCT_VERSION_AT_LEAST(major, minor, patch, build) (__ARMCC_VERSION >= (major * 100000 + minor * 10000 + patch * 1000 + build))
+#else
+/* Define this for !RVCT compilers, just so we can write things like RVCT_VERSION_AT_LEAST(3, 0, 0, 0). */
+#define RVCT_VERSION_AT_LEAST(major, minor, patch, build) 0
+#endif
+
+/* COMPILER(GCCE) - GNU Compiler Collection for Embedded */
+#if defined(__GCCE__)
+#define WTF_COMPILER_GCCE 1
+#define GCCE_VERSION (__GCCE__ * 10000 + __GCCE_MINOR__ * 100 + __GCCE_PATCHLEVEL__)
+#define GCCE_VERSION_AT_LEAST(major, minor, patch) (GCCE_VERSION >= (major * 10000 + minor * 100 + patch))
+#endif
+
+/* COMPILER(GCC) - GNU Compiler Collection */
+/* --gnu option of the RVCT compiler also defines __GNUC__ */
+#if defined(__GNUC__) && !COMPILER(RVCT)
+#define WTF_COMPILER_GCC 1
+#define GCC_VERSION (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__)
+#define GCC_VERSION_AT_LEAST(major, minor, patch) (GCC_VERSION >= (major * 10000 + minor * 100 + patch))
+
+/* Specific compiler features */
+#if !COMPILER(CLANG) && GCC_VERSION_AT_LEAST(4, 6, 0) && defined(__GXX_EXPERIMENTAL_CXX0X__)
+#define WTF_COMPILER_SUPPORTS_CXX_NULLPTR 1 
+#endif
+
+#else
+/* Define this for !GCC compilers, just so we can write things like GCC_VERSION_AT_LEAST(4, 1, 0). */
+#define GCC_VERSION_AT_LEAST(major, minor, patch) 0
+#endif
+
+/* COMPILER(MINGW) - MinGW GCC */
+/* COMPILER(MINGW64) - mingw-w64 GCC - only used as additional check to exclude mingw.org specific functions */
+#if defined(__MINGW32__)
+#define WTF_COMPILER_MINGW 1
+#include <_mingw.h> /* private MinGW header */
+    #if defined(__MINGW64_VERSION_MAJOR) /* best way to check for mingw-w64 vs mingw.org */
+        #define WTF_COMPILER_MINGW64 1
+    #endif /* __MINGW64_VERSION_MAJOR */
+#endif /* __MINGW32__ */
+
+/* COMPILER(INTEL) - Intel C++ Compiler */
+#if defined(__INTEL_COMPILER)
+#define WTF_COMPILER_INTEL 1
+#endif
+
+/* COMPILER(SUNCC) */
+#if defined(__SUNPRO_CC) || defined(__SUNPRO_C)
+#define WTF_COMPILER_SUNCC 1
+#endif
+
+/* ==== Compiler features ==== */
+
+
+/* ALWAYS_INLINE */
+
+#ifndef ALWAYS_INLINE
+#if COMPILER(GCC) && defined(NDEBUG) && !COMPILER(MINGW)
+#define ALWAYS_INLINE inline __attribute__((__always_inline__))
+#elif (COMPILER(MSVC) || COMPILER(RVCT)) && defined(NDEBUG)
+#define ALWAYS_INLINE __forceinline
+#else
+#define ALWAYS_INLINE inline
+#endif
+#endif
+
+
+/* NEVER_INLINE */
+
+#ifndef NEVER_INLINE
+#if COMPILER(GCC)
+#define NEVER_INLINE __attribute__((__noinline__))
+#elif COMPILER(RVCT)
+#define NEVER_INLINE __declspec(noinline)
+#else
+#define NEVER_INLINE
+#endif
+#endif
+
+
+/* UNLIKELY */
+
+#ifndef UNLIKELY
+#if COMPILER(GCC) || (RVCT_VERSION_AT_LEAST(3, 0, 0, 0) && defined(__GNUC__))
+#define UNLIKELY(x) __builtin_expect((x), 0)
+#else
+#define UNLIKELY(x) (x)
+#endif
+#endif
+
+
+/* LIKELY */
+
+#ifndef LIKELY
+#if COMPILER(GCC) || (RVCT_VERSION_AT_LEAST(3, 0, 0, 0) && defined(__GNUC__))
+#define LIKELY(x) __builtin_expect((x), 1)
+#else
+#define LIKELY(x) (x)
+#endif
+#endif
+
+
+/* NO_RETURN */
+
+
+#ifndef NO_RETURN
+#if COMPILER(GCC)
+#define NO_RETURN __attribute((__noreturn__))
+#elif COMPILER(MSVC) || COMPILER(RVCT)
+#define NO_RETURN __declspec(noreturn)
+#else
+#define NO_RETURN
+#endif
+#endif
+
+
+/* NO_RETURN_WITH_VALUE */
+
+#ifndef NO_RETURN_WITH_VALUE
+#if !COMPILER(MSVC)
+#define NO_RETURN_WITH_VALUE NO_RETURN
+#else
+#define NO_RETURN_WITH_VALUE
+#endif
+#endif
+
+
+/* WARN_UNUSED_RETURN */
+
+#if COMPILER(GCC)
+#define WARN_UNUSED_RETURN __attribute__ ((warn_unused_result))
+#else
+#define WARN_UNUSED_RETURN
+#endif
+
+/* OVERRIDE */
+
+#ifndef OVERRIDE
+#if COMPILER(CLANG)
+#if __has_extension(cxx_override_control)
+#define OVERRIDE override
+#endif
+#elif COMPILER(MSVC)
+#define OVERRIDE override
+#endif
+#endif
+
+#ifndef OVERRIDE
+#define OVERRIDE
+#endif
+
+/* FINAL */
+
+#ifndef FINAL
+#if COMPILER(CLANG)
+#if __has_extension(cxx_override_control)
+#define FINAL final
+#endif
+#elif COMPILER(MSVC)
+#define FINAL sealed
+#endif
+#endif
+
+#ifndef FINAL
+#define FINAL
+#endif
+
+#endif /* WTF_Compiler_h */