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diff --git a/Source/JavaScriptCore/runtime/JSAsyncFunction.cpp b/Source/JavaScriptCore/runtime/JSAsyncFunction.cpp
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+++ b/Source/JavaScriptCore/runtime/JSAsyncFunction.cpp
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+/*
+ * Copyright (C) 2016 Caitlin Potter <caitp@igalia.com>.
+ *
+ * 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. AND ITS CONTRIBUTORS ``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 ITS 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 "JSAsyncFunction.h"
+
+#include "Error.h"
+#include "JSCInlines.h"
+#include "JSCJSValue.h"
+#include "JSFunction.h"
+#include "JSFunctionInlines.h"
+#include "JSObject.h"
+#include "PropertySlot.h"
+#include "VM.h"
+
+namespace JSC {
+
+const ClassInfo JSAsyncFunction::s_info = { "AsyncFunction",  &Base::s_info, nullptr, CREATE_METHOD_TABLE(JSAsyncFunction) };
+
+JSAsyncFunction::JSAsyncFunction(VM& vm, FunctionExecutable* executable, JSScope* scope, Structure* structure)
+    : Base(vm, executable, scope, structure)
+{
+}
+
+JSAsyncFunction* JSAsyncFunction::createImpl(VM& vm, FunctionExecutable* executable, JSScope* scope, Structure* structure)
+{
+    JSAsyncFunction* asyncFunction = new (NotNull, allocateCell<JSAsyncFunction>(vm.heap)) JSAsyncFunction(vm, executable, scope, structure);
+    ASSERT(asyncFunction->structure()->globalObject());
+    asyncFunction->finishCreation(vm);
+    return asyncFunction;
+}
+
+JSAsyncFunction* JSAsyncFunction::create(VM& vm, FunctionExecutable* executable, JSScope* scope)
+{
+    JSAsyncFunction* asyncFunction = createImpl(vm, executable, scope, scope->globalObject()->asyncFunctionStructure());
+    executable->singletonFunction()->notifyWrite(vm, asyncFunction, "Allocating an async function");
+    return asyncFunction;
+}
+
+JSAsyncFunction* JSAsyncFunction::create(VM& vm, FunctionExecutable* executable, JSScope* scope, Structure* structure)
+{
+    JSAsyncFunction* asyncFunction = createImpl(vm, executable, scope, structure);
+    executable->singletonFunction()->notifyWrite(vm, asyncFunction, "Allocating an async function");
+    return asyncFunction;
+}
+
+JSAsyncFunction* JSAsyncFunction::createWithInvalidatedReallocationWatchpoint(VM& vm, FunctionExecutable* executable, JSScope* scope)
+{
+    return createImpl(vm, executable, scope, scope->globalObject()->asyncFunctionStructure());
+}
+
+}