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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/112310] [14 Regression] Wrong code at -O2/3
 on x86_64-linux-gnu since r14-1161-g5476de2618f
Date: Tue, 31 Oct 2023 12:02:57 +0000
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X-Bugzilla-Component: tree-optimization
X-Bugzilla-Version: 14.0
X-Bugzilla-Keywords: wrong-code
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D112310

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
   Target Milestone|---                         |14.0
   Last reconfirmed|                            |2023-10-31
             Status|UNCONFIRMED                 |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |rguenth at gcc dot =
gnu.org

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.  We hoist _4 * 2022160547, which is the signed representation.

_4 =3D *h.4_3;
if (_4 >=3D -1)
  goto <bb 7>; [50.00%]
else
  goto <bb 6>; [50.00%]

<bb 7> [local count: 477815112]:
iftmp.1_43 =3D _4 * 2022160547;
p.5_51 =3D (unsigned int) iftmp.1_43;
_52 =3D p.5_51 * 2022160547;
_53 =3D b_lsm.36_24;
_54 =3D (short int) _52;
_55 =3D _53 ^ _54;

<bb 6> [local count: 477815112]:
p.5_7 =3D (unsigned int) _4;
_36 =3D p.5_7 * 2022160547;
_45 =3D b_lsm.36_24;
_46 =3D (short int) _36;
_47 =3D _45 ^ _46;
goto <bb 8>; [100.00%]=