[Bug tree-optimization/96779] Failure to optimize comparison of negative version of self

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96779

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Keywords|                            |easyhack
           Assignee|unassigned at gcc dot gnu.org      |pinskia at gcc dot gnu.org

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This is simple, I will take.
(for cmp (eq ne)
 (simplify
  (cmp:c @0 (negate @0))
   (if (ANY_INTEGRAL_TYPE_P (TREE_TYPE (@0)))
    (cmp:c @0 { build_zero_cst (TREE_TYPE(@0)); })))))

Should be enough.