Count closures using the feedback vector cell map, specialize if count==1.

test/unittests/compiler/js-create-lowering-unittest.cc

Index: test/unittests/compiler/js-create-lowering-unittest.cc
diff --git a/test/unittests/compiler/js-create-lowering-unittest.cc b/test/unittests/compiler/js-create-lowering-unittest.cc
index acdc1fd388a05f97a2453415d231b1035d8cb8f8..7ea1894322473a7d160b72f919d53ca1c2d0f1ef 100644
--- a/test/unittests/compiler/js-create-lowering-unittest.cc
+++ b/test/unittests/compiler/js-create-lowering-unittest.cc
@@ -142,36 +142,6 @@ TEST_F(JSCreateLoweringTest, JSCreateArgumentsInlinedRestArray) {
 }
 
 // -----------------------------------------------------------------------------
-// JSCreateClosure
-
-TEST_F(JSCreateLoweringTest, JSCreateClosureViaInlinedAllocation) {
-  if (!FLAG_turbo_lower_create_closure) return;
-  Node* const context = UndefinedConstant();
-  Node* const effect = graph()->start();
-  Node* const control = graph()->start();
-  Handle<SharedFunctionInfo> shared(isolate()->number_function()->shared());
-
-  // Create a mock feedback vector. It just has to be an array with an array
-  // in slot 0.
-  Handle<FixedArray> array = isolate()->factory()->NewFixedArray(
-      FeedbackVector::kReservedIndexCount + 1);
-  array->set_map_no_write_barrier(isolate()->heap()->feedback_vector_map());
-  Handle<FeedbackVector> vector = Handle<FeedbackVector>::cast(array);
-  FeedbackSlot slot(0);
-  vector->Set(slot, *vector);
-  VectorSlotPair pair(vector, slot);
-
-  Reduction r = Reduce(
-      graph()->NewNode(javascript()->CreateClosure(shared, pair, NOT_TENURED),
-                       context, effect, control));
-  ASSERT_TRUE(r.Changed());
-  EXPECT_THAT(r.replacement(),
-              IsFinishRegion(IsAllocate(IsNumberConstant(JSFunction::kSize),
-                                        IsBeginRegion(_), control),
-                             _));
-}
-
-// -----------------------------------------------------------------------------
 // JSCreateFunctionContext
 
 TEST_F(JSCreateLoweringTest, JSCreateFunctionContextViaInlinedAllocation) {