[Bug c/61029] Bogus conversion warnings are issued on a sign change "a = -a;" operation

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=61029

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |INVALID

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
If a was short_min, the value would be altered as -a would be truncated to 0 as
shorts are promoted to int when doing an unary -.