Count closures using the feedback vector cell map, specialize if count==1.

src/feedback-vector.cc

 // Copyright 2014 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/feedback-vector.h"
 #include "src/code-stubs.h"
 #include "src/feedback-vector-inl.h"
 #include "src/ic/ic-inl.h"
 #include "src/ic/ic-state.h"
 #include "src/objects.h"
@@ skipping 179 matching lines @@
       case FeedbackSlotKind::kLoadGlobalNotInsideTypeof:
         array->set(index, isolate->heap()->empty_weak_cell(),
                    SKIP_WRITE_BARRIER);
         break;
       case FeedbackSlotKind::kCompareOp:
       case FeedbackSlotKind::kBinaryOp:
       case FeedbackSlotKind::kToBoolean:
         array->set(index, Smi::kZero, SKIP_WRITE_BARRIER);
         break;
       case FeedbackSlotKind::kCreateClosure: {
-        Handle<Cell> cell = factory->NewCell(undefined_value);
+        Handle<Cell> cell = factory->NewNoClosuresCell(undefined_value);
         array->set(index, *cell);
         break;
       }
       case FeedbackSlotKind::kLiteral:
         array->set(index, *undefined_value, SKIP_WRITE_BARRIER);
         break;
       case FeedbackSlotKind::kCall:
         array->set(index, *uninitialized_sentinel, SKIP_WRITE_BARRIER);
         extra_value = Smi::kZero;
         break;
@@ skipping 785 matching lines @@
 void StoreDataPropertyInLiteralICNexus::ConfigureMonomorphic(
     Handle<Name> name, Handle<Map> receiver_map) {
   Handle<WeakCell> cell = Map::WeakCellForMap(receiver_map);
 
   SetFeedback(*cell);
   SetFeedbackExtra(*name);
 }
 
 }  // namespace internal
 }  // namespace v8