diff --git a/Source/JavaScriptCore/ftl/FTLOSRExit.cpp b/Source/JavaScriptCore/ftl/FTLOSRExit.cpp
new file mode 100644
index 0000000..be56f82
--- /dev/null
+++ b/Source/JavaScriptCore/ftl/FTLOSRExit.cpp
@@ -0,0 +1,103 @@
+/*
+ * Copyright (C) 2013 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. 
+ */
+
+#include "config.h"
+#include "FTLOSRExit.h"
+
+#if ENABLE(FTL_JIT)
+
+#include "CodeBlock.h"
+#include "DFGBasicBlock.h"
+#include "DFGNode.h"
+#include "FTLExitArgument.h"
+#include "FTLExitArgumentList.h"
+#include "FTLJITCode.h"
+#include "Operations.h"
+
+namespace JSC { namespace FTL {
+
+using namespace DFG;
+
+OSRExit::OSRExit(
+    ExitKind exitKind, ValueFormat profileValueFormat,
+    MethodOfGettingAValueProfile valueProfile, CodeOrigin codeOrigin,
+    int lastSetOperand, unsigned numberOfArguments, unsigned numberOfLocals)
+    : OSRExitBase(exitKind, codeOrigin)
+    , m_profileValueFormat(profileValueFormat)
+    , m_valueProfile(valueProfile)
+    , m_patchableCodeOffset(0)
+    , m_lastSetOperand(lastSetOperand)
+    , m_values(numberOfArguments, numberOfLocals)
+{
+}
+
+CodeLocationJump OSRExit::codeLocationForRepatch(CodeBlock* ftlCodeBlock) const
+{
+    return CodeLocationJump(
+        reinterpret_cast<char*>(
+            ftlCodeBlock->getJITCode()->ftl()->exitThunks().dataLocation()) +
+        m_patchableCodeOffset);
+}
+
+void OSRExit::convertToForward(
+    BasicBlock* block, Node* currentNode, unsigned nodeIndex,
+    const FormattedValue &value, ExitArgumentList& arguments)
+{
+    Node* node;
+    Node* lastMovHint;
+    if (!doSearchForForwardConversion(block, currentNode, nodeIndex, !!value, node, lastMovHint))
+        return;
+
+    ASSERT(node->codeOrigin != currentNode->codeOrigin);
+    
+    m_codeOrigin = node->codeOrigin;
+    
+    if (!value)
+        return;
+    
+    int overriddenOperand = lastMovHint->local();
+    m_lastSetOperand = overriddenOperand;
+    
+    // Is the value for this operand being passed as an argument to the exit, or is
+    // it something else? If it's an argument already, then replace that argument;
+    // otherwise add another argument.
+    if (m_values[overriddenOperand].isArgument()) {
+        ExitArgument exitArgument = m_values[overriddenOperand].exitArgument();
+        arguments[exitArgument.argument()] = value.value();
+        m_values[overriddenOperand] = ExitValue::exitArgument(
+            exitArgument.withFormat(value.format()));
+        return;
+    }
+    
+    unsigned argument = arguments.size();
+    arguments.append(value.value());
+    m_values[m_lastSetOperand] = ExitValue::exitArgument(
+        ExitArgument(value.format(), argument));
+}
+
+} } // namespace JSC::FTL
+
+#endif // ENABLE(FTL_JIT)
+