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diff --git a/Source/JavaScriptCore/b3/air/AirCCallSpecial.cpp b/Source/JavaScriptCore/b3/air/AirCCallSpecial.cpp
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+++ b/Source/JavaScriptCore/b3/air/AirCCallSpecial.cpp
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+/*
+ * Copyright (C) 2015 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 "AirCCallSpecial.h"
+
+#if ENABLE(B3_JIT)
+
+namespace JSC { namespace B3 { namespace Air {
+
+CCallSpecial::CCallSpecial()
+{
+    m_clobberedRegs = RegisterSet::allRegisters();
+    m_clobberedRegs.exclude(RegisterSet::stackRegisters());
+    m_clobberedRegs.exclude(RegisterSet::reservedHardwareRegisters());
+    m_clobberedRegs.exclude(RegisterSet::calleeSaveRegisters());
+    m_clobberedRegs.clear(GPRInfo::returnValueGPR);
+    m_clobberedRegs.clear(GPRInfo::returnValueGPR2);
+    m_clobberedRegs.clear(FPRInfo::returnValueFPR);
+}
+
+CCallSpecial::~CCallSpecial()
+{
+}
+
+void CCallSpecial::forEachArg(Inst& inst, const ScopedLambda<Inst::EachArgCallback>& callback)
+{
+    for (unsigned i = 0; i < numCalleeArgs; ++i)
+        callback(inst.args[calleeArgOffset + i], Arg::Use, Arg::GP, Arg::pointerWidth());
+    for (unsigned i = 0; i < numReturnGPArgs; ++i)
+        callback(inst.args[returnGPArgOffset + i], Arg::Def, Arg::GP, Arg::pointerWidth());
+    for (unsigned i = 0; i < numReturnFPArgs; ++i)
+        callback(inst.args[returnFPArgOffset + i], Arg::Def, Arg::FP, Arg::Width64);
+    
+    for (unsigned i = argArgOffset; i < inst.args.size(); ++i) {
+        // For the type, we can just query the arg's type. The arg will have a type, because we
+        // require these args to be argument registers.
+        Arg::Type type = inst.args[i].type();
+        callback(inst.args[i], Arg::Use, type, Arg::conservativeWidth(type));
+    }
+}
+
+bool CCallSpecial::isValid(Inst& inst)
+{
+    if (inst.args.size() < argArgOffset)
+        return false;
+
+    for (unsigned i = 0; i < numCalleeArgs; ++i) {
+        Arg& arg = inst.args[i + calleeArgOffset];
+        if (!arg.isGP())
+            return false;
+        switch (arg.kind()) {
+        case Arg::Imm:
+            if (is32Bit())
+                break;
+            return false;
+        case Arg::BigImm:
+            if (is64Bit())
+                break;
+            return false;
+        case Arg::Tmp:
+        case Arg::Addr:
+        case Arg::Stack:
+        case Arg::CallArg:
+            break;
+        default:
+            return false;
+        }
+    }
+
+    // Return args need to be exact.
+    if (inst.args[returnGPArgOffset + 0] != Tmp(GPRInfo::returnValueGPR))
+        return false;
+    if (inst.args[returnGPArgOffset + 1] != Tmp(GPRInfo::returnValueGPR2))
+        return false;
+    if (inst.args[returnFPArgOffset + 0] != Tmp(FPRInfo::returnValueFPR))
+        return false;
+
+    for (unsigned i = argArgOffset; i < inst.args.size(); ++i) {
+        if (!inst.args[i].isReg())
+            return false;
+
+        if (inst.args[i] == Tmp(scratchRegister))
+            return false;
+    }
+    return true;
+}
+
+bool CCallSpecial::admitsStack(Inst&, unsigned argIndex)
+{
+    // The callee can be on the stack.
+    if (argIndex == calleeArgOffset)
+        return true;
+    
+    return false;
+}
+
+void CCallSpecial::reportUsedRegisters(Inst&, const RegisterSet&)
+{
+}
+
+CCallHelpers::Jump CCallSpecial::generate(Inst& inst, CCallHelpers& jit, GenerationContext&)
+{
+    switch (inst.args[calleeArgOffset].kind()) {
+    case Arg::Imm:
+    case Arg::BigImm:
+        jit.move(inst.args[calleeArgOffset].asTrustedImmPtr(), scratchRegister);
+        jit.call(scratchRegister);
+        break;
+    case Arg::Tmp:
+        jit.call(inst.args[calleeArgOffset].gpr());
+        break;
+    case Arg::Addr:
+        jit.call(inst.args[calleeArgOffset].asAddress());
+        break;
+    default:
+        RELEASE_ASSERT_NOT_REACHED();
+        break;
+    }
+    return CCallHelpers::Jump();
+}
+
+RegisterSet CCallSpecial::extraEarlyClobberedRegs(Inst&)
+{
+    return m_emptyRegs;
+}
+
+RegisterSet CCallSpecial::extraClobberedRegs(Inst&)
+{
+    return m_clobberedRegs;
+}
+
+void CCallSpecial::dumpImpl(PrintStream& out) const
+{
+    out.print("CCall");
+}
+
+void CCallSpecial::deepDumpImpl(PrintStream& out) const
+{
+    out.print("function call that uses the C calling convention.");
+}
+
+} } } // namespace JSC::B3::Air
+
+#endif // ENABLE(B3_JIT)