Handle array construction in native code (ARM version)

src/builtins.cc

 // Copyright 2006-2008 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 154 matching lines @@
         return array;
       }
     }
     // Take the argument as the length.
     obj = array->Initialize(0);
     if (obj->IsFailure()) return obj;
     return array->SetElementsLength(args[1]);
   }
 
   // Optimize the case where there are no parameters passed.
-  if (args.length() == 1) return array->Initialize(4);
+  if (args.length() == 1) {
+    return array->Initialize(JSArray::kPreallocatedArrayElements);
+  }
 
   // Take the arguments as elements.
   int number_of_elements = args.length() - 1;
   Smi* len = Smi::FromInt(number_of_elements);
   Object* obj = Heap::AllocateFixedArrayWithHoles(len->value());
   if (obj->IsFailure()) return obj;
   FixedArray* elms = FixedArray::cast(obj);
   WriteBarrierMode mode = elms->GetWriteBarrierMode();
   // Fill in the content
   for (int index = 0; index < number_of_elements; index++) {
@@ skipping 567 matching lines @@
       if (entry->contains(pc)) {
         return names_[i];
       }
     }
   }
   return NULL;
 }
 
 
 } }  // namespace v8::internal