Type Feedback Vector: Calculate profiler counts on the fly.

src/type-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/type-feedback-vector.h"
 
 #include "src/code-stubs.h"
 #include "src/ic/ic.h"
 #include "src/ic/ic-state.h"
 #include "src/objects.h"
@@ skipping 122 matching lines @@
   Factory* factory = isolate->factory();
 
   const int slot_count = metadata->slot_count();
   const int length = slot_count + kReservedIndexCount;
   if (length == kReservedIndexCount) {
     return Handle<TypeFeedbackVector>::cast(factory->empty_fixed_array());
   }
 
   Handle<FixedArray> array = factory->NewFixedArray(length, TENURED);
   array->set(kMetadataIndex, *metadata);
-  array->set(kWithTypesIndex, Smi::FromInt(0));
-  array->set(kGenericCountIndex, Smi::FromInt(0));
 
   // Ensure we can skip the write barrier
   Handle<Object> uninitialized_sentinel = UninitializedSentinel(isolate);
   DCHECK_EQ(*factory->uninitialized_symbol(), *uninitialized_sentinel);
   for (int i = kReservedIndexCount; i < length; i++) {
     array->set(i, *uninitialized_sentinel, SKIP_WRITE_BARRIER);
   }
 
   return Handle<TypeFeedbackVector>::cast(array);
 }
@@ skipping 688 matching lines @@
   return mode;
 }
 
 
 IcCheckType KeyedStoreICNexus::GetKeyType() const {
   // The structure of the vector slots tells us the type.
   return GetFeedback()->IsName() ? PROPERTY : ELEMENT;
 }
 }  // namespace internal
 }  // namespace v8