A type vector with multiple IC types needs metadata.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index be73a64078821226e26267afbd5dab28a98477e8..414ec978e1417b0af59fd3c8fd88ace5ddf38f2e 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -2415,7 +2415,7 @@ class IncrementalMarking;
 class FixedArray: public FixedArrayBase {
  public:
   // Setter and getter for elements.
-  inline Object* get(int index);
+  inline Object* get(int index) const;
   static inline Handle<Object> get(Handle<FixedArray> array, int index);
   // Setter that uses write barrier.
   inline void set(int index, Object* value);