[Bug libstdc++/90409] std::move[_backward] could be more optimized for deque iterators

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90409

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |missed-optimization
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2019-05-09
     Ever confirmed|0                           |1
           Severity|normal                      |enhancement