Hack forEach to use HasFastPackedElements

src/runtime.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 14100 matching lines @@
   RUNTIME_FUNCTION(MaybeObject*, Runtime_Has##Name) {     \
     CONVERT_ARG_CHECKED(JSObject, obj, 0);              \
     return isolate->heap()->ToBoolean(obj->Has##Name());  \
   }
 
 ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION(FastSmiElements)
 ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION(FastObjectElements)
 ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION(FastSmiOrObjectElements)
 ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION(FastDoubleElements)
 ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION(FastHoleyElements)
+ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION(FastPackedElements)
 ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION(DictionaryElements)
 ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION(NonStrictArgumentsElements)
 ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION(ExternalPixelElements)
 ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION(ExternalArrayElements)
 ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION(ExternalByteElements)
 ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION(ExternalUnsignedByteElements)
 ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION(ExternalShortElements)
 ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION(ExternalUnsignedShortElements)
 ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION(ExternalIntElements)
 ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION(ExternalUnsignedIntElements)
@@ skipping 273 matching lines @@
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     isolate->counters()->gc_last_resort_from_js()->Increment();
     isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags,
                                        "Runtime::PerformGC");
   }
 }
 
 
 } }  // namespace v8::internal