Check that external references are registered in the serializer.

src/arm64/codegen-arm64.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_ARM64
 
 #include "src/arm64/simulator-arm64.h"
 #include "src/codegen.h"
@@ skipping 502 matching lines @@
                                    Register temp2,
                                    Register temp3) {
   // TODO(jbramley): There are several instances where fnmsub could be used
   // instead of fmul and fsub. Doing this changes the result, but since this is
   // an estimation anyway, does it matter?
 
   DCHECK(!AreAliased(input, result,
                      double_temp1, double_temp2,
                      temp1, temp2, temp3));
   DCHECK(ExternalReference::math_exp_constants(0).address() != NULL);
+  DCHECK(!masm->serializer_enabled());  // External references not serializable.
 
   Label done;
   DoubleRegister double_temp3 = result;
   Register constants = temp3;
 
   // The algorithm used relies on some magic constants which are initialized in
   // ExternalReference::InitializeMathExpData().
 
   // Load the address of the start of the array.
   __ Mov(constants, ExternalReference::math_exp_constants(0));
@@ skipping 83 matching lines @@
   __ Fmul(result, double_temp3, double_temp1);
 
   __ Bind(&done);
 }
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM64