[turbofan] Collect invocation counts and compute relative call frequencies.

src/profiler/heap-snapshot-generator.cc

 // Copyright 2013 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/profiler/heap-snapshot-generator.h"
 
 #include "src/code-stubs.h"
 #include "src/conversions.h"
 #include "src/debug/debug.h"
 #include "src/objects-body-descriptors.h"
@@ skipping 1812 matching lines @@
   }
   return interrupted;
 }
 
 
 bool V8HeapExplorer::IsEssentialObject(Object* object) {
   return object->IsHeapObject() && !object->IsOddball() &&
          object != heap_->empty_byte_array() &&
          object != heap_->empty_fixed_array() &&
          object != heap_->empty_descriptor_array() &&
+         object != heap_->empty_type_feedback_vector() &&
          object != heap_->fixed_array_map() && object != heap_->cell_map() &&
          object != heap_->global_property_cell_map() &&
          object != heap_->shared_function_info_map() &&
          object != heap_->free_space_map() &&
          object != heap_->one_pointer_filler_map() &&
          object != heap_->two_pointer_filler_map();
 }
 
 bool V8HeapExplorer::IsEssentialHiddenReference(Object* parent,
                                                 int field_offset) {
@@ skipping 1278 matching lines @@
   for (int i = 1; i < sorted_strings.length(); ++i) {
     writer_->AddCharacter(',');
     SerializeString(sorted_strings[i]);
     if (writer_->aborted()) return;
   }
 }
 
 
 }  // namespace internal
 }  // namespace v8