Also support smi in load-ICs.

src/stub-cache.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 76 matching lines @@
                       InlineCacheHolderFlag cache_holder = OWN_MAP);
 
   Handle<Code> FindHandler(Handle<Name> name,
                            Handle<Object> object,
                            Handle<HeapObject> stub_holder,
                            Code::Kind kind,
                            InlineCacheHolderFlag cache_holder = OWN_MAP,
                            StrictModeFlag strict_mode = kNonStrictMode);
 
   Handle<Code> ComputeMonomorphicIC(Handle<Name> name,
-                                    Handle<HeapObject> receiver,
+                                    Handle<Object> receiver,
                                     Handle<Code> handler,
                                     StrictModeFlag strict_mode);
 
   Handle<Code> ComputeLoadNonexistent(Handle<Name> name, Handle<Object> object);
 
   Handle<Code> ComputeKeyedLoadElement(Handle<Map> receiver_map);
 
   Handle<Code> ComputeKeyedStoreElement(Handle<Map> receiver_map,
                                         StrictModeFlag strict_mode,
                                         KeyedAccessStoreMode store_mode);
@@ skipping 941 matching lines @@
   Handle<JSFunction> constant_function_;
   bool is_simple_api_call_;
   Handle<FunctionTemplateInfo> expected_receiver_type_;
   Handle<CallHandlerInfo> api_call_info_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_STUB_CACHE_H_