The metadata part of TypeFeedbackVector is extracted to TypeFeedbackMetadata array.

src/heap/heap.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/heap/heap.h"
 
 #include "src/accessors.h"
 #include "src/api.h"
 #include "src/base/bits.h"
 #include "src/base/once.h"
@@ skipping 2717 matching lines @@
 
     DCHECK_EQ(load_ic_slot,
               FeedbackVectorSlot(TypeFeedbackVector::kDummyLoadICSlot));
     DCHECK_EQ(keyed_load_ic_slot,
               FeedbackVectorSlot(TypeFeedbackVector::kDummyKeyedLoadICSlot));
     DCHECK_EQ(store_ic_slot,
               FeedbackVectorSlot(TypeFeedbackVector::kDummyStoreICSlot));
     DCHECK_EQ(keyed_store_ic_slot,
               FeedbackVectorSlot(TypeFeedbackVector::kDummyKeyedStoreICSlot));
 
+    Handle<TypeFeedbackMetadata> dummy_metadata =
+        TypeFeedbackMetadata::New(isolate(), &spec);
     Handle<TypeFeedbackVector> dummy_vector =
-        TypeFeedbackVector::New(isolate(), &spec);
+        TypeFeedbackVector::New(isolate(), dummy_metadata);
 
     Object* megamorphic = *TypeFeedbackVector::MegamorphicSentinel(isolate());
     dummy_vector->Set(load_ic_slot, megamorphic, SKIP_WRITE_BARRIER);
     dummy_vector->Set(keyed_load_ic_slot, megamorphic, SKIP_WRITE_BARRIER);
     dummy_vector->Set(store_ic_slot, megamorphic, SKIP_WRITE_BARRIER);
     dummy_vector->Set(keyed_store_ic_slot, megamorphic, SKIP_WRITE_BARRIER);
 
     set_dummy_vector(*dummy_vector);
   }
 
@@ skipping 3347 matching lines @@
 }
 
 
 // static
 int Heap::GetStaticVisitorIdForMap(Map* map) {
   return StaticVisitorBase::GetVisitorId(map);
 }
 
 }  // namespace internal
 }  // namespace v8