[TypeFeedbackVector] Root literal arrays in function literals slots

test/cctest/test-feedback-vector.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/v8.h"
 #include "test/cctest/cctest.h"
 
 #include "src/api.h"
 #include "src/debug/debug.h"
 #include "src/execution.h"
@@ skipping 77 matching lines @@
                  4 * TypeFeedbackMetadata::GetSlotSize(
                          FeedbackVectorSlotKind::CALL_IC),
              index);
     CHECK_EQ(helper.slot(7), vector->ToSlot(index));
 
     CHECK_EQ(TypeFeedbackVector::kReservedIndexCount + 3 +
                  5 * TypeFeedbackMetadata::GetSlotSize(
                          FeedbackVectorSlotKind::CALL_IC),
              vector->length());
   }
+
+  {
+    FeedbackVectorSpec spec(&zone);
+    spec.AddGeneralSlot();
+    spec.AddCreateClosureSlot(5);
+    spec.AddGeneralSlot();
+    vector = NewTypeFeedbackVector(isolate, &spec);
+    FeedbackVectorHelper helper(vector);
+    CHECK_EQ(1, TypeFeedbackMetadata::GetSlotSize(
+                    FeedbackVectorSlotKind::CREATE_CLOSURE));
+    FeedbackVectorSlot slot = helper.slot(1);
+    FixedArray* array = FixedArray::cast(vector->Get(slot));
+    CHECK_EQ(5, array->length());
+    CHECK_EQ(5, vector->GetParameter(slot));
+    CHECK_EQ(array->get(0), *factory->undefined_value());
+  }
 }
 
 
 // IC slots need an encoding to recognize what is in there.
 TEST(VectorICMetadata) {
   LocalContext context;
   v8::HandleScope scope(context->GetIsolate());
   Isolate* isolate = CcTest::i_isolate();
   Zone zone(isolate->allocator(), ZONE_NAME);
 
@@ skipping 475 matching lines @@
   // There should be one IC slot.
   Handle<TypeFeedbackVector> feedback_vector(f->feedback_vector());
   FeedbackVectorHelper helper(feedback_vector);
   CHECK_EQ(1, helper.slot_count());
   FeedbackVectorSlot slot(0);
   StoreICNexus nexus(feedback_vector, slot);
   CHECK_EQ(MONOMORPHIC, nexus.StateFromFeedback());
 }
 
 }  // namespace