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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/111711] [14 Regression] ICE: in
 maybe_legitimize_operand, at optabs.cc:8046 at -O1 with division by zero
Date: Fri, 06 Oct 2023 08:29:41 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111711

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
           Keywords|needs-bisection             |
   Last reconfirmed|                            |2023-10-06
             Status|UNCONFIRMED                 |NEW

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
It was introduced by r14-2667-gceae1400cf24f329393e96dd9720 .

We have:
  long int x;
  int _3;
  _Bool _5;
  _3 =3D 0 / 0;
  _5 =3D _3 =3D=3D 822920;
  x_7 =3D _5 ? 822920 : 0;

If I disable the added checks on dealing with rtx_equal_p, the ICE goes awa=
y.
The problem is the mode for the result does not match the mode for the
comparison (DImode for the result of the conditional and SImode for the
comparison).=