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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/110009] Another missing ABS detection
Date: Mon, 04 Sep 2023 08:39:20 +0000
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Version: 14.0
X-Bugzilla-Keywords: missed-optimization
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110009

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
With the nop_convert added and using bitwise_equal_p :

(simplify
 (mult:c @0 (nop_convert? (bit_ior:c (rshift @1 INTEGER_CST@2) integer_onep=
)))
 (if (!TYPE_UNSIGNED (TREE_TYPE (@1))
      && wi::to_wide (@2) =3D=3D element_precision (type) - 1
      && bitwise_equal_p (@0, @1))
  (if (TYPE_UNSIGNED (type))
   (absu @1)
   (abs @1))))=