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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/110539] [14 Regression] Dead Code Elimination
 Regression at since r14-338-g1dd154f6407
Date: Thu, 06 Jul 2023 21:20:59 +0000
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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=3D110539

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
     Ever confirmed|0                           |1
           Assignee|unassigned at gcc dot gnu.org      |pinskia at gcc dot =
gnu.org
   Last reconfirmed|                            |2023-07-06

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

  # RANGE [irange] int [0, 1] NONZERO 0x1
  i_7 =3D a.0_1 & 1;

  _17 =3D i_7 !=3D 0;
  _12 =3D (int) _17;
  if (i_7 =3D=3D _12)


So this should have been optimized to _17 =3D (bool) i_7;
and then if (1)

Maybe it is an order of the stuff in match.pd ...=