Share Maps for ElementsKind transitions

src/v8-counters.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 108 matching lines @@
   SC(total_compiled_code_size, V8.TotalCompiledCodeSize)              \
   SC(gc_compactor_caused_by_request, V8.GCCompactorCausedByRequest)   \
   SC(gc_compactor_caused_by_promoted_data,                            \
      V8.GCCompactorCausedByPromotedData)                              \
   SC(gc_compactor_caused_by_oldspace_exhaustion,                      \
      V8.GCCompactorCausedByOldspaceExhaustion)                        \
   SC(gc_compactor_caused_by_weak_handles,                             \
      V8.GCCompactorCausedByWeakHandles)                               \
   SC(gc_last_resort_from_js, V8.GCLastResortFromJS)                   \
   SC(gc_last_resort_from_handles, V8.GCLastResortFromHandles)         \
-  SC(map_to_fast_elements, V8.MapToFastElements)                      \
-  SC(map_to_fast_double_elements, V8.MapToFastDoubleElements)         \
-  SC(map_to_slow_elements, V8.MapToSlowElements)                      \
-  SC(map_to_external_array_elements, V8.MapToExternalArrayElements)   \
   /* How is the generic keyed-load stub used? */                      \
   SC(keyed_load_generic_smi, V8.KeyedLoadGenericSmi)                  \
   SC(keyed_load_generic_symbol, V8.KeyedLoadGenericSymbol)            \
   SC(keyed_load_generic_lookup_cache, V8.KeyedLoadGenericLookupCache) \
   SC(keyed_load_generic_slow, V8.KeyedLoadGenericSlow)                \
   SC(keyed_load_polymorphic_stubs, V8.KeyedLoadPolymorphicStubs)      \
   SC(keyed_load_external_array_slow, V8.KeyedLoadExternalArraySlow)   \
   /* How is the generic keyed-call stub used? */                      \
   SC(keyed_call_generic_smi_fast, V8.KeyedCallGenericSmiFast)         \
   SC(keyed_call_generic_smi_dict, V8.KeyedCallGenericSmiDict)         \
@@ skipping 159 matching lines @@
   // Sliding state window counters.
   StatsCounter state_counters_[kSlidingStateWindowCounterCount];
   friend class Isolate;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(Counters);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_V8_COUNTERS_H_