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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/108482] [13 Regression] ice in
 expand_LOOP_DIST_ALIAS with -O3 -ftrivial-auto-var-init=zero
Date: Fri, 20 Jan 2023 21:15:36 +0000
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X-Bugzilla-Component: tree-optimization
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X-Bugzilla-Keywords: ice-on-valid-code
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D108482

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
What is interesting is if we look at the IR:

  _41 =3D .LOOP_DIST_ALIAS (3, _40);
  if (_41 !=3D 0)
    goto <bb 3>; [90.00%]
  else
    goto <bb 4>; [10.00%]

  <bb 3> [local count: 430033601]:
  _29 =3D *_4;
  _30 =3D (char) _29;
  _31 =3D _7 & _30;
  goto <bb 5>; [100.00%]

  <bb 4> [local count: 47781512]:
  _47 =3D *_4;
  _48 =3D (char) _47;
  _49 =3D _7 & _48;

  <bb 5> [local count: 118111600]:
  # _46 =3D PHI <_49(4), _31(3)>

That code is the same on both edges even though not noticed being the same.=