[Bug tree-optimization/114204] Missed optimization: -(a*!a) => 0 when a=-b-c

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114204

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2024-03-02
     Ever confirmed|0                           |1

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---

`A == B ? (A - B) : 0`

And `A == -B ? (A + B) : 0`

Can be handled easily in match.pd.

So mine.

I think both can be done for !have_nans & !HAVE_SIGNED_ZEROS.