[TypeFeedbackVector] Combine the literals array and the feedback vector.

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/ast/context-slot-cache.h"
 #include "src/base/bits.h"
@@ skipping 2780 matching lines @@
     // relativize the absolute call counts, but we can only have call counts
     // if we have actual feedback slots.
     Handle<FixedArray> empty_type_feedback_vector = factory->NewFixedArray(
         TypeFeedbackVector::kReservedIndexCount, TENURED);
     empty_type_feedback_vector->set(TypeFeedbackVector::kMetadataIndex,
                                     empty_fixed_array());
     empty_type_feedback_vector->set(TypeFeedbackVector::kInvocationCountIndex,
                                     Smi::kZero);
     empty_type_feedback_vector->set_map(type_feedback_vector_map());
     set_empty_type_feedback_vector(*empty_type_feedback_vector);
-
-    // We use a canonical empty LiteralsArray for all functions that neither
-    // have literals nor need a TypeFeedbackVector (besides the invocation
-    // count special slot).
-    Handle<FixedArray> empty_literals_array =
-        factory->NewFixedArray(1, TENURED);
-    empty_literals_array->set(0, *empty_type_feedback_vector);
-    set_empty_literals_array(*empty_literals_array);
   }
 
   {
     Handle<FixedArray> empty_sloppy_arguments_elements =
         factory->NewFixedArray(2, TENURED);
     empty_sloppy_arguments_elements->set_map(sloppy_arguments_elements_map());
     set_empty_sloppy_arguments_elements(*empty_sloppy_arguments_elements);
   }
 
   {
@@ skipping 3787 matching lines @@
 }
 
 
 // static
 int Heap::GetStaticVisitorIdForMap(Map* map) {
   return StaticVisitorBase::GetVisitorId(map);
 }
 
 }  // namespace internal
 }  // namespace v8