Hydrogen should recognize literal smi arrays as fast literals.

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 1634 matching lines @@
 inline bool AllocationSite::CanTrack(InstanceType type) {
   if (FLAG_allocation_site_pretenuring) {
     return type == JS_ARRAY_TYPE ||
         type == JS_OBJECT_TYPE ||
         type < FIRST_NONSTRING_TYPE;
   }
   return type == JS_ARRAY_TYPE;
 }
 
 
-inline DependentCode::DependencyGroup AllocationSite::ToDependencyGroup(
-    Reason reason) {
-  switch (reason) {
-    case TENURING:
-      return DependentCode::kAllocationSiteTenuringChangedGroup;
-      break;
-    case TRANSITIONS:
-      return DependentCode::kAllocationSiteTransitionChangedGroup;
-      break;
-  }
-  UNREACHABLE();
-  return DependentCode::kAllocationSiteTransitionChangedGroup;
-}
-
-
 inline void AllocationSite::set_memento_found_count(int count) {
   int value = pretenure_data()->value();
   // Verify that we can count more mementos than we can possibly find in one
   // new space collection.
   DCHECK((GetHeap()->MaxSemiSpaceSize() /
           (StaticVisitorBase::kMinObjectSizeInWords * kPointerSize +
            AllocationMemento::kSize)) < MementoFoundCountBits::kMax);
   DCHECK(count < MementoFoundCountBits::kMax);
   set_pretenure_data(
       Smi::FromInt(MementoFoundCountBits::update(value, count)),
@@ skipping 5748 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_