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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/68894] Recognition min/max pattern with
 multiple arguments.
Date: Sun, 09 Apr 2023 23:33:39 +0000
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X-Bugzilla-Component: tree-optimization
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D68894

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

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

--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Mine, working on improving phi-opt here; though the hoisting of the load is
something which needs to be looked into further.

I have the match.pd pattern for what is mentioned in comment #3:
/* These was part of minmax phiopt.  */
/* Optimize (a CMP b) ? minmax<a, c> : minmax<b, c>
   to minmax<min/max<a, b>, c> */
(for minmax (min max)
 (for cmp (lt le gt ge)
  (simplify
   (cond (cmp @1 @3) (minmax:c @1 @4) (minmax:c @2 @4))
   (with
    {
      tree_code code =3D minmax_from_comparison (cmp, @1, @2, @1, @3);
    }
    (if (code =3D=3D MIN_EXPR)
     (minmax (min @1 @2) @4)
     (if (code =3D=3D MAX_EXPR)
      (minmax (max @1 @2) @4)))))))

I also have the improvements to match_simplify_replacement which are needed=
 to
use those patterns too. I will be submitting them for GCC 14.=