Revert of Revert [TypeFeedbackVector] Root literal arrays in function literal slots

src/type-feedback-vector.cc

Index: src/type-feedback-vector.cc
diff --git a/src/type-feedback-vector.cc b/src/type-feedback-vector.cc
index 267fd862edc8bed19ffbae4468767e4f5b23c73f..dfcb98d1ec1501114b85dd39da622d739de1198a 100644
--- a/src/type-feedback-vector.cc
+++ b/src/type-feedback-vector.cc
@@ -251,10 +251,8 @@
         // the empty literals array here.
         array->set(index, *factory->empty_literals_array(), SKIP_WRITE_BARRIER);
       } else {
-        // TODO(mvstanton): Create the array.
-        // Handle<FixedArray> value = factory->NewFixedArray(length);
-        // array->set(index, *value);
-        array->set(index, *factory->empty_literals_array(), SKIP_WRITE_BARRIER);
+        Handle<FixedArray> value = factory->NewFixedArray(length);
+        array->set(index, *value);
       }
     }
     i += entry_size;
@@ -375,10 +373,10 @@
           break;
         }
         case FeedbackVectorSlotKind::CREATE_CLOSURE: {
-          // Fill the array with undefined.
-          FixedArray* array = FixedArray::cast(Get(slot));
-          for (int i = 1; i < array->length(); i++) {
-            array->set_undefined(i);
+          // Clear the literals in the embedded LiteralsArray.
+          LiteralsArray* literals = LiteralsArray::cast(Get(slot));
+          for (int i = 0; i < literals->literals_count(); i++) {
+            literals->set_literal_undefined(i);
           }
           break;
         }