[TypeFeedbackVector] Root feedback vectors at function literal site.

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 <utility>
 
 #include "src/code-stubs.h"
 #include "src/conversions.h"
@@ skipping 1094 matching lines @@
       } else {
         SetPropertyReference(
             obj, entry,
             heap_->prototype_string(), js_fun->prototype());
         SetInternalReference(
             obj, entry, "initial_map", proto_or_map,
             JSFunction::kPrototypeOrInitialMapOffset);
       }
     }
     SharedFunctionInfo* shared_info = js_fun->shared();
-    TagObject(js_fun->feedback_vector(), "(function feedback vector)");
-    SetInternalReference(js_fun, entry, "feedback_vector",
-                         js_fun->feedback_vector(),
+    TagObject(js_fun->feedback_vector_cell(),
+              "(function feedback vector cell)");
+    SetInternalReference(js_fun, entry, "feedback_vector_cell",
+                         js_fun->feedback_vector_cell(),
                          JSFunction::kFeedbackVectorOffset);
     TagObject(shared_info, "(shared function info)");
     SetInternalReference(js_fun, entry,
                          "shared", shared_info,
                          JSFunction::kSharedFunctionInfoOffset);
     TagObject(js_fun->context(), "(context)");
     SetInternalReference(js_fun, entry,
                          "context", js_fun->context(),
                          JSFunction::kContextOffset);
     // Ensure no new weak references appeared in JSFunction.
@@ skipping 1987 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