Type Feedback Vector lives in the closure

src/factory.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/factory.h"
 
 #include "src/allocation-site-scopes.h"
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
 #include "src/conversions.h"
@@ skipping 1189 matching lines @@
                                         PretenureFlag pretenure) {
   AllocationSpace space = pretenure == TENURED ? OLD_SPACE : NEW_SPACE;
   Handle<JSFunction> function = New<JSFunction>(map, space);
 
   function->initialize_properties();
   function->initialize_elements();
   function->set_shared(*info);
   function->set_code(info->code());
   function->set_context(*context);
   function->set_prototype_or_initial_map(*the_hole_value());
-  function->set_literals(LiteralsArray::cast(*empty_fixed_array()));
+  function->set_literals(LiteralsArray::cast(*empty_literals_array()));
   function->set_next_function_link(*undefined_value(), SKIP_WRITE_BARRIER);
   isolate()->heap()->InitializeJSObjectBody(*function, *map, JSFunction::kSize);
   return function;
 }
 
 
 Handle<JSFunction> Factory::NewFunction(Handle<Map> map,
                                         Handle<String> name,
                                         MaybeHandle<Code> code) {
   Handle<Context> context(isolate()->native_context());
@@ skipping 145 matching lines @@
       context->native_context(), BailoutId::None());
   if (cached.code != nullptr) {
     // Caching of optimized code enabled and optimized code found.
     DCHECK(!cached.code->marked_for_deoptimization());
     DCHECK(result->shared()->is_compiled());
     result->ReplaceCode(cached.code);
   }
 
   if (cached.literals != nullptr) {
     result->set_literals(cached.literals);
-  } else {
+  } else if (info->is_compiled()) {
     int number_of_literals = info->num_literals();
+    Handle<TypeFeedbackVector> vector =
+        TypeFeedbackVector::New(isolate(), handle(info->feedback_metadata()));
     Handle<LiteralsArray> literals =
-        LiteralsArray::New(isolate(), handle(info->feedback_vector()),
-                           number_of_literals, pretenure);
+        LiteralsArray::New(isolate(), vector, number_of_literals, pretenure);
     result->set_literals(*literals);
 
     // Cache context-specific literals.
     Handle<Context> native_context(context->native_context());
     SharedFunctionInfo::AddLiteralsToOptimizedCodeMap(info, native_context,
                                                       literals);
   }
 
   return result;
 }
@@ skipping 689 matching lines @@
   heap->InitializeJSObjectFromMap(*object, *properties, *map);
 
   // Restore the saved hash.
   object->set_hash(*hash);
 }
 
 
 Handle<SharedFunctionInfo> Factory::NewSharedFunctionInfo(
     Handle<String> name, int number_of_literals, FunctionKind kind,
     Handle<Code> code, Handle<ScopeInfo> scope_info,
-    Handle<TypeFeedbackVector> feedback_vector) {
+    Handle<TypeFeedbackMetadata> feedback_metadata) {
   DCHECK(IsValidFunctionKind(kind));
   Handle<SharedFunctionInfo> shared = NewSharedFunctionInfo(
       name, code, IsConstructable(kind, scope_info->language_mode()));
   shared->set_scope_info(*scope_info);
-  shared->set_feedback_vector(*feedback_vector);
+  shared->set_feedback_metadata(*feedback_metadata);
   shared->set_kind(kind);
   shared->set_num_literals(number_of_literals);
   if (IsGeneratorFunction(kind)) {
     shared->set_instance_class_name(isolate()->heap()->Generator_string());
     shared->DisableOptimization(kGenerator);
   }
   return shared;
 }
 
 
@@ skipping 35 matching lines @@
                      : isolate()->builtins()->ConstructedNonConstructable();
   share->set_construct_stub(*construct_stub);
   share->set_instance_class_name(*Object_string());
   share->set_function_data(*undefined_value(), SKIP_WRITE_BARRIER);
   share->set_script(*undefined_value(), SKIP_WRITE_BARRIER);
   share->set_debug_info(*undefined_value(), SKIP_WRITE_BARRIER);
   share->set_inferred_name(*empty_string(), SKIP_WRITE_BARRIER);
   StaticFeedbackVectorSpec empty_spec;
   Handle<TypeFeedbackMetadata> feedback_metadata =
       TypeFeedbackMetadata::New(isolate(), &empty_spec);
-  Handle<TypeFeedbackVector> feedback_vector =
-      TypeFeedbackVector::New(isolate(), feedback_metadata);
-  share->set_feedback_vector(*feedback_vector, SKIP_WRITE_BARRIER);
+  share->set_feedback_metadata(*feedback_metadata, SKIP_WRITE_BARRIER);
 #if TRACE_MAPS
   share->set_unique_id(isolate()->GetNextUniqueSharedFunctionInfoId());
 #endif
   share->set_profiler_ticks(0);
   share->set_ast_node_count(0);
   share->set_counters(0);
 
   // Set integer fields (smi or int, depending on the architecture).
   share->set_length(0);
   share->set_internal_formal_parameter_count(0);
@@ skipping 234 matching lines @@
 }
 
 
 Handle<Object> Factory::ToBoolean(bool value) {
   return value ? true_value() : false_value();
 }
 
 
 }  // namespace internal
 }  // namespace v8