Additional work to get array literal allocation tracking working, even with --always-opt

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 650 matching lines @@
     boilerplate =
         Runtime::CreateArrayLiteralBoilerplate(isolate, literals, elements);
     if (boilerplate.is_null()) return Failure::Exception();
     // Update the functions literal and return the boilerplate.
     literals->set(literals_index, *boilerplate);
   }
   if (JSObject::cast(*boilerplate)->elements()->map() ==
       isolate->heap()->fixed_cow_array_map()) {
     isolate->counters()->cow_arrays_created_runtime()->Increment();
   }
-  return isolate->heap()->CopyJSObject(JSObject::cast(*boilerplate));
+
+  JSObject* boilerplate_object = JSObject::cast(*boilerplate);
+  AllocationSiteMode mode = AllocationSiteInfo::GetMode(
+      boilerplate_object->GetElementsKind());
+  return isolate->heap()->CopyJSObject(boilerplate_object, mode);
 }
 
 
 RUNTIME_FUNCTION(MaybeObject*, Runtime_CreateJSProxy) {
   ASSERT(args.length() == 2);
   CONVERT_ARG_CHECKED(JSReceiver, handler, 0);
   Object* prototype = args[1];
   Object* used_prototype =
       prototype->IsJSReceiver() ? prototype : isolate->heap()->null_value();
   return isolate->heap()->AllocateJSProxy(handler, used_prototype);
@@ skipping 13034 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