When clearing filled call target caches we should go back to the

test/cctest/test-heap.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 2849 matching lines @@
   Handle<FixedArray> feedback_vector(TypeFeedbackInfo::cast(
       f->shared()->code()->type_feedback_info())->feedback_vector());
 
   CHECK_EQ(2, feedback_vector->length());
   CHECK(feedback_vector->get(0)->IsJSFunction());
   CHECK(feedback_vector->get(1)->IsJSFunction());
 
   SimulateIncrementalMarking();
   CcTest::heap()->CollectAllGarbage(Heap::kNoGCFlags);
 
+  // Make sure we go back to the premonomorphic cache state.
   CHECK_EQ(2, feedback_vector->length());
-  CHECK(feedback_vector->get(0)->IsTheHole());
-  CHECK(feedback_vector->get(1)->IsTheHole());
+  CHECK(feedback_vector->get(0)->IsNull());
+  CHECK(feedback_vector->get(1)->IsNull());
 }
 
 
 static Code* FindFirstIC(Code* code, Code::Kind kind) {
   int mask = RelocInfo::ModeMask(RelocInfo::CODE_TARGET) |
              RelocInfo::ModeMask(RelocInfo::CONSTRUCT_CALL) |
              RelocInfo::ModeMask(RelocInfo::CODE_TARGET_WITH_ID);
   for (RelocIterator it(code, mask); !it.done(); it.next()) {
     RelocInfo* info = it.rinfo();
     Code* target = Code::GetCodeFromTargetAddress(info->target_address());
@@ skipping 800 matching lines @@
     code = scope.CloseAndEscape(Handle<Code>(bar->code()));
   }
 
   // Now make sure that a gc should get rid of the function
   for (int i = 0; i < 4; i++) {
     heap->CollectAllGarbage(Heap::kAbortIncrementalMarkingMask);
   }
 
   ASSERT(code->marked_for_deoptimization());
 }