Adding GetMoreGeneralElementsKind in elements-kind.h

src/builtins.cc

 // 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.
 
 #include "src/builtins.h"
 
 #include "src/api.h"
 #include "src/api-natives.h"
 #include "src/arguments.h"
 #include "src/base/once.h"
@@ skipping 632 matching lines @@
       DCHECK(result_len >= 0);
 
       if (result_len > FixedDoubleArray::kMaxLength) {
         AllowHeapAllocation allow_allocation;
         return CallJsIntrinsic(isolate, isolate->array_concat(), args);
       }
 
       ElementsKind arg_kind = JSArray::cast(arg)->map()->elements_kind();
       has_double = has_double || IsFastDoubleElementsKind(arg_kind);
       is_holey = is_holey || IsFastHoleyElementsKind(arg_kind);
-      if (IsMoreGeneralElementsKindTransition(elements_kind, arg_kind)) {
-        elements_kind = arg_kind;
-      }
+      elements_kind = GetMoreGeneralElementsKind(elements_kind, arg_kind);
     }
     if (is_holey) elements_kind = GetHoleyElementsKind(elements_kind);
   }
 
   // If a double array is concatted into a fast elements array, the fast
   // elements array needs to be initialized to contain proper holes, since
   // boxing doubles may cause incremental marking.
   ArrayStorageAllocationMode mode =
       has_double && IsFastObjectElementsKind(elements_kind)
       ? INITIALIZE_ARRAY_ELEMENTS_WITH_HOLE : DONT_INITIALIZE_ARRAY_ELEMENTS;
@@ skipping 647 matching lines @@
 BUILTIN_LIST_C(DEFINE_BUILTIN_ACCESSOR_C)
 BUILTIN_LIST_A(DEFINE_BUILTIN_ACCESSOR_A)
 BUILTIN_LIST_H(DEFINE_BUILTIN_ACCESSOR_H)
 BUILTIN_LIST_DEBUG_A(DEFINE_BUILTIN_ACCESSOR_A)
 #undef DEFINE_BUILTIN_ACCESSOR_C
 #undef DEFINE_BUILTIN_ACCESSOR_A
 
 
 }  // namespace internal
 }  // namespace v8