Link type feedback vectors to the shared function info.

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 20 matching lines @@
 }
 
 
 TEST(VectorStructure) {
   LocalContext context;
   v8::HandleScope scope(context->GetIsolate());
   Isolate* isolate = CcTest::i_isolate();
   Factory* factory = isolate->factory();
   Zone zone(isolate->allocator(), ZONE_NAME);
 
-  // Empty vectors are the empty fixed array.
-  StaticFeedbackVectorSpec empty;
-  Handle<FeedbackVector> vector = NewFeedbackVector(isolate, &empty);
-  CHECK(Handle<FixedArray>::cast(vector).is_identical_to(
-      factory->empty_feedback_vector()));
-  // Which can nonetheless be queried.
-  CHECK(vector->is_empty());
+  Handle<FeedbackVector> vector;
 
   {
     FeedbackVectorSpec one_slot(&zone);
     one_slot.AddGeneralSlot();
     vector = NewFeedbackVector(isolate, &one_slot);
     FeedbackVectorHelper helper(vector);
     CHECK_EQ(1, helper.slot_count());
   }
 
   {
@@ skipping 574 matching lines @@
   // There should be one IC slot.
   Handle<FeedbackVector> feedback_vector(f->feedback_vector());
   FeedbackVectorHelper helper(feedback_vector);
   CHECK_EQ(1, helper.slot_count());
   FeedbackSlot slot(0);
   StoreICNexus nexus(feedback_vector, slot);
   CHECK_EQ(MONOMORPHIC, nexus.StateFromFeedback());
 }
 
 }  // namespace