Add Crankshaft support for smi-only elements

src/ic.cc

 // Copyright 2011 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 1671 matching lines @@
   }
 }
 
 
 MaybeObject* KeyedIC::ComputeMonomorphicStub(JSObject* receiver,
                                              bool is_store,
                                              StrictModeFlag strict_mode,
                                              Code* generic_stub) {
   Code* result = NULL;
   if (receiver->HasFastElements() ||
+      receiver->HasFastSmiOnlyElements() ||
       receiver->HasExternalArrayElements() ||
       receiver->HasFastDoubleElements() ||
       receiver->HasDictionaryElements()) {
     MaybeObject* maybe_stub =
         isolate()->stub_cache()->ComputeKeyedLoadOrStoreElement(
             receiver, is_store, strict_mode);
     if (!maybe_stub->To(&result)) return maybe_stub;
   } else {
     result = generic_stub;
   }
@@ skipping 805 matching lines @@
 #undef ADDR
 };
 
 
 Address IC::AddressFromUtilityId(IC::UtilityId id) {
   return IC_utilities[id];
 }
 
 
 } }  // namespace v8::internal