[Bug middle-end/78995] A strange copy error caused by O3 optimization

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78995

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING
   Last reconfirmed|                            |2017-01-05
          Component|c++                         |middle-end
     Ever confirmed|0                           |1

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Does adding -fno-strict-aliasing fix the problem you are seeing?

I am suspecting the code is violating C/C++ aliasing rules.