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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/111346] New: `X <= MINMAX` pattern is missing
 :c on the cmp
Date: Fri, 08 Sep 2023 21:51:40 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Version: 14.0
X-Bugzilla-Keywords: internal-improvement, missed-optimization
X-Bugzilla-Severity: enhancement
X-Bugzilla-Who: pinskia at gcc dot gnu.org
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: pinskia at gcc dot gnu.org
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111346

            Bug ID: 111346
           Summary: `X <=3D MINMAX` pattern is missing :c on the cmp
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Keywords: internal-improvement, missed-optimization
          Severity: enhancement
          Priority: P3
         Component: tree-optimization
          Assignee: pinskia at gcc dot gnu.org
          Reporter: pinskia at gcc dot gnu.org
  Target Milestone: ---

The pattern:
```
/* X <=3D MAX(X, Y) -> true
   X > MAX(X, Y) -> false=20
   X >=3D MIN(X, Y) -> true
   X < MIN(X, Y) -> false */
(for minmax (min     min     max     max     )
     cmp    (ge      lt      le      gt      )
 (simplify
  (cmp @0 (minmax:c @0 @1))
  { constant_boolean_node (cmp =3D=3D GE_EXPR || cmp =3D=3D LE_EXPR, type);=
 } ))
```
Is missing :c on the cmp which causes us to miss:
MAX(X, Y) >=3D X -> true
etc.=