Merge r7706 from the bleeding_edge into 3.1 branch....

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 800 matching lines @@
 
   if (item_count < actual_delete_count) {
     // Shrink the array.
     const bool trim_array = !Heap::lo_space()->Contains(elms) &&
       ((actual_start + item_count) <
           (len - actual_delete_count - actual_start));
     if (trim_array) {
       const int delta = actual_delete_count - item_count;
 
       if (actual_start > 0) {
-        Object** start = elms->data_start();
-        memmove(start + delta, start, actual_start * kPointerSize);
+        AssertNoAllocation no_gc;
+        MoveElements(&no_gc, elms, delta, elms, 0, actual_start);
       }
 
       elms = LeftTrimFixedArray(elms, delta);
       array->set_elements(elms, SKIP_WRITE_BARRIER);
     } else {
       AssertNoAllocation no_gc;
       MoveElements(&no_gc,
                    elms, actual_start + item_count,
                    elms, actual_start + actual_delete_count,
                    (len - actual_delete_count - actual_start));
@@ skipping 744 matching lines @@
       if (entry->contains(pc)) {
         return names_[i];
       }
     }
   }
   return NULL;
 }
 
 
 } }  // namespace v8::internal