A type vector with multiple IC types needs metadata.

src/objects-inl.h

 // Copyright 2012 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.
 //
 // Review notes:
 //
 // - The use of macros in these inline functions may seem superfluous
 // but it is absolutely needed to make sure gcc generates optimal
 // code. gcc is not happy when attempting to inline too deep.
 //
@@ skipping 2187 matching lines @@
         IsUndefined() ||
         IsTrue() ||
         IsFalse() ||
         IsNull())) {
     FATAL("API call returned invalid object");
   }
 #endif  // ENABLE_EXTRA_CHECKS
 }
 
 
-Object* FixedArray::get(int index) {
+Object* FixedArray::get(int index) const {
   SLOW_DCHECK(index >= 0 && index < this->length());
   return READ_FIELD(this, kHeaderSize + index * kPointerSize);
 }
 
 
 Handle<Object> FixedArray::get(Handle<FixedArray> array, int index) {
   return handle(array->get(index), array->GetIsolate());
 }
 
 
@@ skipping 5066 matching lines @@
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 #undef NOBARRIER_READ_BYTE_FIELD
 #undef NOBARRIER_WRITE_BYTE_FIELD
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_