Fix x64 breakage in r3136

src/x64/codegen-x64.cc

 // Copyright 2009 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 5217 matching lines @@
 void DeferredInlineSmiAddReversed::Generate() {
   GenericBinaryOpStub igostub(Token::ADD, overwrite_mode_, NO_SMI_CODE_IN_STUB);
   igostub.GenerateCall(masm_, value_, dst_);
   if (!dst_.is(rax)) __ movq(dst_, rax);
 }
 
 
 void DeferredInlineSmiSub::Generate() {
   GenericBinaryOpStub igostub(Token::SUB, overwrite_mode_, NO_SMI_CODE_IN_STUB);
   igostub.GenerateCall(masm_, dst_, value_);
+  if (!dst_.is(rax)) __ movq(dst_, rax);
 }
 
 
 void DeferredInlineSmiOperation::Generate() {
   // For mod we don't generate all the Smi code inline.
   GenericBinaryOpStub stub(
       op_,
       overwrite_mode_,
       (op_ == Token::MOD) ? NO_GENERIC_BINARY_FLAGS : NO_SMI_CODE_IN_STUB);
   stub.GenerateCall(masm_, src_, value_);
@@ skipping 2626 matching lines @@
   masm.GetCode(&desc);
   // Call the function from C++.
   return FUNCTION_CAST<ModuloFunction>(buffer);
 }
 
 #endif
 
 #undef __
 
 } }  // namespace v8::internal