[FeedbackVector] Infrastructure for literal arrays in the vector.

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 88d5ff689d3167f07712f0842e7b134a12071eb2..4f9e1c69693e9b2234168336ff6ccaf9c124c178 100644
--- a/test/unittests/compiler/js-create-lowering-unittest.cc
+++ b/test/unittests/compiler/js-create-lowering-unittest.cc
@@ -12,6 +12,7 @@
 #include "src/compiler/node-properties.h"
 #include "src/compiler/operator-properties.h"
 #include "src/isolate-inl.h"
+#include "src/type-feedback-vector.h"
 #include "test/unittests/compiler/compiler-test-utils.h"
 #include "test/unittests/compiler/graph-unittest.h"
 #include "test/unittests/compiler/node-test-utils.h"
@@ -143,9 +144,21 @@ TEST_F(JSCreateLoweringTest, JSCreateClosureViaInlinedAllocation) {
   Node* const effect = graph()->start();
   Node* const control = graph()->start();
   Handle<SharedFunctionInfo> shared(isolate()->number_function()->shared());
-  Reduction r =
-      Reduce(graph()->NewNode(javascript()->CreateClosure(shared, NOT_TENURED),
-                              context, effect, control));
+
+  // Create a mock feedback vector. It just has to be an array with an array
+  // in slot 0.
+  Handle<FixedArray> array = isolate()->factory()->NewFixedArray(
+      TypeFeedbackVector::kReservedIndexCount + 1);
+  array->set_map_no_write_barrier(
+      isolate()->heap()->type_feedback_vector_map());
+  Handle<TypeFeedbackVector> vector = Handle<TypeFeedbackVector>::cast(array);
+  FeedbackVectorSlot 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),