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diff --git a/Source/JavaScriptCore/heap/MarkStackInlineMethods.h b/Source/JavaScriptCore/heap/MarkStackInlineMethods.h
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+++ b/Source/JavaScriptCore/heap/MarkStackInlineMethods.h
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+/*
+ * Copyright (C) 2009, 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 MarkStackInlineMethods_h
+#define MarkStackInlineMethods_h
+
+#include "GCThreadSharedData.h"
+#include "MarkStack.h"
+
+namespace JSC {
+
+ALWAYS_INLINE void MarkStack::append(JSValue* slot, size_t count)
+{
+    for (size_t i = 0; i < count; ++i) {
+        JSValue& value = slot[i];
+        if (!value)
+            continue;
+        internalAppend(value);
+    }
+}
+
+template<typename T>
+inline void MarkStack::appendUnbarrieredPointer(T** slot)
+{
+    ASSERT(slot);
+    JSCell* cell = *slot;
+    if (cell)
+        internalAppend(cell);
+}
+
+ALWAYS_INLINE void MarkStack::append(JSValue* slot)
+{
+    ASSERT(slot);
+    internalAppend(*slot);
+}
+
+ALWAYS_INLINE void MarkStack::appendUnbarrieredValue(JSValue* slot)
+{
+    ASSERT(slot);
+    internalAppend(*slot);
+}
+
+ALWAYS_INLINE void MarkStack::append(JSCell** slot)
+{
+    ASSERT(slot);
+    internalAppend(*slot);
+}
+
+ALWAYS_INLINE void MarkStack::internalAppend(JSValue value)
+{
+    ASSERT(value);
+    if (!value.isCell())
+        return;
+    internalAppend(value.asCell());
+}
+
+inline void MarkStack::addWeakReferenceHarvester(WeakReferenceHarvester* weakReferenceHarvester)
+{
+    m_shared.m_weakReferenceHarvesters.addThreadSafe(weakReferenceHarvester);
+}
+
+inline void MarkStack::addUnconditionalFinalizer(UnconditionalFinalizer* unconditionalFinalizer)
+{
+    m_shared.m_unconditionalFinalizers.addThreadSafe(unconditionalFinalizer);
+}
+
+inline void MarkStack::addOpaqueRoot(void* root)
+{
+#if ENABLE(PARALLEL_GC)
+    if (Options::numberOfGCMarkers() == 1) {
+        // Put directly into the shared HashSet.
+        m_shared.m_opaqueRoots.add(root);
+        return;
+    }
+    // Put into the local set, but merge with the shared one every once in
+    // a while to make sure that the local sets don't grow too large.
+    mergeOpaqueRootsIfProfitable();
+    m_opaqueRoots.add(root);
+#else
+    m_opaqueRoots.add(root);
+#endif
+}
+
+inline bool MarkStack::containsOpaqueRoot(void* root)
+{
+    ASSERT(!m_isInParallelMode);
+#if ENABLE(PARALLEL_GC)
+    ASSERT(m_opaqueRoots.isEmpty());
+    return m_shared.m_opaqueRoots.contains(root);
+#else
+    return m_opaqueRoots.contains(root);
+#endif
+}
+
+inline int MarkStack::opaqueRootCount()
+{
+    ASSERT(!m_isInParallelMode);
+#if ENABLE(PARALLEL_GC)
+    ASSERT(m_opaqueRoots.isEmpty());
+    return m_shared.m_opaqueRoots.size();
+#else
+    return m_opaqueRoots.size();
+#endif
+}
+
+} // namespace JSC
+
+#endif