[TypeFeedbackVector] Root feedback vectors at function literal site.

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/accessors.h"
 #include "src/allocation-site-scopes.h"
 #include "src/ast/ast.h"
 #include "src/base/bits.h"
@@ skipping 1403 matching lines @@
   Handle<JSFunction> function = New<JSFunction>(map, space);
   DCHECK(context_or_undefined->IsContext() ||
          context_or_undefined->IsUndefined(isolate()));
 
   function->initialize_properties();
   function->initialize_elements();
   function->set_shared(*info);
   function->set_code(info->code());
   function->set_context(*context_or_undefined);
   function->set_prototype_or_initial_map(*the_hole_value());
-  function->set_feedback_vector(
-      TypeFeedbackVector::cast(*empty_type_feedback_vector()));
+  function->set_feedback_vector_cell(*undefined_cell());
   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 112 matching lines @@
   int map_index =
       Context::FunctionMapIndex(info->language_mode(), info->kind());
   Handle<Map> initial_map(Map::cast(context->native_context()->get(map_index)));
 
   return NewFunctionFromSharedFunctionInfo(initial_map, info, context,
                                            pretenure);
 }
 
 Handle<JSFunction> Factory::NewFunctionFromSharedFunctionInfo(
     Handle<SharedFunctionInfo> info, Handle<Context> context,
-    Handle<TypeFeedbackVector> vector, PretenureFlag pretenure) {
+    Handle<Cell> vector, PretenureFlag pretenure) {
   int map_index =
       Context::FunctionMapIndex(info->language_mode(), info->kind());
   Handle<Map> initial_map(Map::cast(context->native_context()->get(map_index)));
 
   return NewFunctionFromSharedFunctionInfo(initial_map, info, context, vector,
                                            pretenure);
 }
 
 Handle<JSFunction> Factory::NewFunctionFromSharedFunctionInfo(
     Handle<Map> initial_map, Handle<SharedFunctionInfo> info,
     Handle<Object> context_or_undefined, PretenureFlag pretenure) {
   DCHECK_EQ(JS_FUNCTION_TYPE, initial_map->instance_type());
   Handle<JSFunction> result =
       NewFunction(initial_map, info, context_or_undefined, pretenure);
 
   if (info->ic_age() != isolate()->heap()->global_ic_age()) {
     info->ResetForNewContext(isolate()->heap()->global_ic_age());
   }
 
   if (context_or_undefined->IsContext()) {
     // Give compiler a chance to pre-initialize.
     Compiler::PostInstantiation(result, pretenure);
   }
 
   return result;
 }
 
 Handle<JSFunction> Factory::NewFunctionFromSharedFunctionInfo(
     Handle<Map> initial_map, Handle<SharedFunctionInfo> info,
-    Handle<Object> context_or_undefined, Handle<TypeFeedbackVector> vector,
+    Handle<Object> context_or_undefined, Handle<Cell> vector,
     PretenureFlag pretenure) {
   DCHECK_EQ(JS_FUNCTION_TYPE, initial_map->instance_type());
   Handle<JSFunction> result =
       NewFunction(initial_map, info, context_or_undefined, pretenure);
 
-  result->set_feedback_vector(*vector);
+  result->set_feedback_vector_cell(*vector);
   if (info->ic_age() != isolate()->heap()->global_ic_age()) {
     info->ResetForNewContext(isolate()->heap()->global_ic_age());
   }
 
   if (context_or_undefined->IsContext()) {
     // Give compiler a chance to pre-initialize.
     Compiler::PostInstantiation(result, pretenure);
   }
 
   return result;
@@ skipping 1244 matching lines @@
     Handle<AccessorInfo> prototype =
         Accessors::FunctionPrototypeInfo(isolate(), rw_attribs);
     Descriptor d = Descriptor::AccessorConstant(
         Handle<Name>(Name::cast(prototype->name())), prototype, rw_attribs);
     map->AppendDescriptor(&d);
   }
 }
 
 }  // namespace internal
 }  // namespace v8