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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/108625] [11/12/13 Regression] forwprop
 introduces new UB
Date: Wed, 01 Feb 2023 21:49:36 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Version: 13.0
X-Bugzilla-Keywords: wrong-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: pinskia at gcc dot gnu.org
X-Bugzilla-Status: NEW
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X-Bugzilla-Target-Milestone: 11.4
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D108625

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |wrong-code
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2023-02-01
   Target Milestone|---                         |11.4
            Summary|forwprop introduces new UB  |[11/12/13 Regression]
                   |                            |forwprop introduces new UB
             Status|UNCONFIRMED                 |NEW

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
GCC 12.1.0:
Applying pattern match.pd:2763, gimple-match.cc:40998
Applying pattern match.pd:2532, gimple-match.cc:63517
Applying pattern match.pd:3647, gimple-match.cc:69622
gimple_simplified to _7 =3D t_2 - x_1(D);
_5 =3D (unsigned char) _7;


Introduced by r11-3207-g8f0d743c2dee6a .

Confirmed.=