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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/115154] [13 Regression] wrong code at
 optimization levels -O2, -O3, -Os since r13-7434-g682bbd364708fe
Date: Sun, 19 May 2024 22:17:49 +0000
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X-Bugzilla-Component: tree-optimization
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X-Bugzilla-Keywords: wrong-code
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D115154

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|needs-bisection             |wrong-code
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2024-05-19
           Assignee|unassigned at gcc dot gnu.org      |pinskia at gcc dot =
gnu.org
     Ever confirmed|0                           |1

--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Sam James from comment #6)
> yep, r14-3432-gddd64a6ec3b38e fixed it on trunk

So that is not the correct fix really. It just works around the bad ir/bug.
Tomorrow I will look into the correct fix. -a is not well defined for signe=
d:1
and something created it which was wrong. There was a few other fixes in th=
is
area that fixed stuff like this too which was done due to detection of lowe=
ring
vectors.=