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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/111364] `MAX_EXPR<a, b> <= a` is not
 optimized to `a >= b`
Date: Tue, 12 Sep 2023 00:36:06 +0000
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Version: 14.0
X-Bugzilla-Keywords: missed-optimization
X-Bugzilla-Severity: enhancement
X-Bugzilla-Who: pinskia at gcc dot gnu.org
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Message-ID: <bug-111364-4-QVTCdVlHfl@http.gcc.gnu.org/bugzilla/>
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111364

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
diff --git a/gcc/match.pd b/gcc/match.pd
index 51985c1bad4..bf49c167792 100644
--- a/gcc/match.pd
+++ b/gcc/match.pd
@@ -3902,9 +3902,9 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
   (maxmin @0 (bit_not @1))))

 /* MIN (X, Y) =3D=3D X -> X <=3D Y  */
-(for minmax (min min max max)
-     cmp    (eq  ne  eq  ne )
-     out    (le  gt  ge  lt )
+(for minmax (min min min min max max max max)
+     cmp    (eq  ne  lt  ge  eq  ne  gt  le )
+     out    (le  gt  gt  le  ge  lt  lt  ge )
  (simplify
   (cmp:c (minmax:c @0 @1) @0)
   (if (ANY_INTEGRAL_TYPE_P (TREE_TYPE (@0)))=