Also support smi in load-ICs.

src/ic-inl.h

 // 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 95 matching lines @@
   // If the object is a value, we use the prototype map for the cache.
   ASSERT(object->IsString() || object->IsSymbol() ||
          object->IsNumber() || object->IsBoolean());
   return PROTOTYPE_MAP;
 }
 
 
 HeapObject* IC::GetCodeCacheHolder(Isolate* isolate,
                                  Object* object,
                                  InlineCacheHolderFlag holder) {
-  Object* map_owner =
-      holder == OWN_MAP ? object : object->GetPrototype(isolate);
+  if (object->IsSmi()) holder = PROTOTYPE_MAP;
+  Object* map_owner = holder == OWN_MAP
+      ? object : object->GetPrototype(isolate);
   return HeapObject::cast(map_owner);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_IC_INL_H_