fix the compare nil ic

src/stub-cache.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 901 matching lines @@
   stub.SetKind(kNonStrictEquality);
 
   Handle<String> name(isolate_->heap()->empty_string());
   if (!receiver_map->is_shared()) {
     Handle<Code> cached_ic = FindIC(name, receiver_map, Code::COMPARE_NIL_IC,
                                     Code::NORMAL, stub.GetExtraICState());
     if (!cached_ic.is_null()) return cached_ic;
   }
 
   Handle<Code> ic = stub.GetCode(isolate_);
+
   // For monomorphic maps, use the code as a template, copying and replacing
   // the monomorphic map that checks the object's type.
   ic = isolate_->factory()->CopyCode(ic);
   ic->ReplaceFirstMap(*receiver_map);
 
   if (!receiver_map->is_shared()) {
     Map::UpdateCodeCache(receiver_map, name, ic);
   }
 
   return ic;
@@ skipping 1171 matching lines @@
           Handle<FunctionTemplateInfo>(
               FunctionTemplateInfo::cast(signature->receiver()));
     }
   }
 
   is_simple_api_call_ = true;
 }
 
 
 } }  // namespace v8::internal