[stubs] Port KeyedStoreIC_Megamorphic stub to Turbofan

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 1652 matching lines @@
 // elements kind is the initial elements kind.
 AllocationSiteMode AllocationSite::GetMode(
     ElementsKind boilerplate_elements_kind) {
   if (IsFastSmiElementsKind(boilerplate_elements_kind)) {
     return TRACK_ALLOCATION_SITE;
   }
 
   return DONT_TRACK_ALLOCATION_SITE;
 }
 
-
-AllocationSiteMode AllocationSite::GetMode(ElementsKind from,
-                                           ElementsKind to) {
-  if (IsFastSmiElementsKind(from) &&
-      IsMoreGeneralElementsKindTransition(from, to)) {
-    return TRACK_ALLOCATION_SITE;
-  }
-
-  return DONT_TRACK_ALLOCATION_SITE;
-}
-
-
 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;
 }
 
 
@@ skipping 6737 matching lines @@
 #undef WRITE_INT64_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 #undef NOBARRIER_READ_BYTE_FIELD
 #undef NOBARRIER_WRITE_BYTE_FIELD
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_OBJECTS_INL_H_