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diff --git a/Source/JavaScriptCore/heap/MarkedAllocatorInlines.h b/Source/JavaScriptCore/heap/MarkedAllocatorInlines.h
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+++ b/Source/JavaScriptCore/heap/MarkedAllocatorInlines.h
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+/*
+ * Copyright (C) 2017 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. 
+ */
+
+#pragma once
+
+#include "MarkedAllocator.h"
+
+namespace JSC {
+
+ALWAYS_INLINE void* MarkedAllocator::tryAllocate(GCDeferralContext* deferralContext)
+{
+    unsigned remaining = m_freeList.remaining;
+    if (remaining) {
+        unsigned cellSize = m_cellSize;
+        remaining -= cellSize;
+        m_freeList.remaining = remaining;
+        return m_freeList.payloadEnd - remaining - cellSize;
+    }
+    
+    FreeCell* head = m_freeList.head;
+    if (UNLIKELY(!head))
+        return tryAllocateSlowCase(deferralContext);
+    
+    m_freeList.head = head->next;
+    return head;
+}
+
+ALWAYS_INLINE void* MarkedAllocator::allocate(GCDeferralContext* deferralContext)
+{
+    unsigned remaining = m_freeList.remaining;
+    if (remaining) {
+        unsigned cellSize = m_cellSize;
+        remaining -= cellSize;
+        m_freeList.remaining = remaining;
+        return m_freeList.payloadEnd - remaining - cellSize;
+    }
+    
+    FreeCell* head = m_freeList.head;
+    if (UNLIKELY(!head))
+        return allocateSlowCase(deferralContext);
+    
+    m_freeList.head = head->next;
+    return head;
+}
+
+template <typename Functor> inline void MarkedAllocator::forEachBlock(const Functor& functor)
+{
+    m_live.forEachSetBit(
+        [&] (size_t index) {
+            functor(m_blocks[index]);
+        });
+}
+
+template <typename Functor> inline void MarkedAllocator::forEachNotEmptyBlock(const Functor& functor)
+{
+    m_markingNotEmpty.forEachSetBit(
+        [&] (size_t index) {
+            functor(m_blocks[index]);
+        });
+}
+
+} // namespace JSC
+