Replace OS::MemCopy with OS::MemMove (just as fast but more flexible).

src/objects.cc

 // Copyright 2013 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 14065 matching lines @@
   Handle<DeclaredAccessorDescriptor> value =
       isolate->factory()->NewDeclaredAccessorDescriptor();
   value->set_serialized_data(*serialized_descriptor);
   // Copy in the data.
   {
     AssertNoAllocation no_allocation;
     uint8_t* array = serialized_descriptor->GetDataStartAddress();
     if (previous_length != 0) {
       uint8_t* previous_array =
           previous->serialized_data()->GetDataStartAddress();
-      memcpy(array, previous_array, previous_length);
+      OS::MemCopy(array, previous_array, previous_length);
       array += previous_length;
     }
     ASSERT(reinterpret_cast<uintptr_t>(array) % sizeof(uintptr_t) == 0);
     DeclaredAccessorDescriptorData* data =
         reinterpret_cast<DeclaredAccessorDescriptorData*>(array);
     *data = descriptor;
   }
   return value;
 }
 
@@ skipping 376 matching lines @@
   set_year(Smi::FromInt(year), SKIP_WRITE_BARRIER);
   set_month(Smi::FromInt(month), SKIP_WRITE_BARRIER);
   set_day(Smi::FromInt(day), SKIP_WRITE_BARRIER);
   set_weekday(Smi::FromInt(weekday), SKIP_WRITE_BARRIER);
   set_hour(Smi::FromInt(hour), SKIP_WRITE_BARRIER);
   set_min(Smi::FromInt(min), SKIP_WRITE_BARRIER);
   set_sec(Smi::FromInt(sec), SKIP_WRITE_BARRIER);
 }
 
 } }  // namespace v8::internal