fix windows after r18847

src/x64/stub-cache-x64.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * 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
@@ skipping 1234 matching lines @@
 
   // v8::PropertyAccessorInfo::args_.
   __ movp(StackSpaceOperand(0), rax);
 
   // The context register (rsi) has been saved in PrepareCallApiFunction and
   // could be used to pass arguments.
   __ lea(accessor_info_arg, StackSpaceOperand(0));
 
   Address thunk_address = FUNCTION_ADDR(&InvokeAccessorGetterCallback);
 
-  Register api_function_address = rdx;
+  Register api_function_address = r8;
+  // It's okay if api_function_address == getter_arg
+  // but not accessor_info_arg or name_arg
+  ASSERT(!api_function_address.is(accessor_info_arg) &&
+         !api_function_address.is(name_arg));
+
   __ Move(api_function_address, getter_address, RelocInfo::EXTERNAL_REFERENCE);
 
   // The name handler is counted as an argument.
   StackArgumentsAccessor args(rbp, PropertyCallbackArguments::kArgsLength);
   Operand return_value_operand = args.GetArgumentOperand(
       PropertyCallbackArguments::kArgsLength - 1 -
       PropertyCallbackArguments::kReturnValueOffset);
   __ CallApiFunctionAndReturn(api_function_address,
                               thunk_address,
                               getter_arg,
@@ skipping 751 matching lines @@
   // -----------------------------------
   TailCallBuiltin(masm, Builtins::kKeyedLoadIC_Miss);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64