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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	[thread overview]
Message-ID: <bug-108482-4-SSqorFfvPR@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-108482-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108482

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

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

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

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

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

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

  parent reply	other threads:[~2023-01-20 21:15 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-01-20 16:24 [Bug c/108482] New: ice in expand_LOOP_DIST_ALIAS, at internal-fn.cc:2737 dcb314 at hotmail dot com
2023-01-20 16:32 ` [Bug c/108482] " dcb314 at hotmail dot com
2023-01-20 21:13 ` [Bug tree-optimization/108482] [13 Regression] ice in expand_LOOP_DIST_ALIAS with -O3 -ftrivial-auto-var-init=zero pinskia at gcc dot gnu.org
2023-01-20 21:15 ` pinskia at gcc dot gnu.org [this message]
2023-01-20 21:19 ` pinskia at gcc dot gnu.org
2023-01-21 14:19 ` dcb314 at hotmail dot com
2023-01-21 14:20 ` dcb314 at hotmail dot com
2023-01-21 14:49 ` dcb314 at hotmail dot com
2023-01-21 15:18 ` dcb314 at hotmail dot com
2023-01-21 16:31 ` dcb314 at hotmail dot com
2023-01-21 16:52 ` dcb314 at hotmail dot com
2023-01-21 16:57 ` dcb314 at hotmail dot com
2023-01-21 20:13 ` pinskia at gcc dot gnu.org
2023-01-23  7:24 ` rguenth at gcc dot gnu.org
2023-01-23 10:51 ` cvs-commit at gcc dot gnu.org
2023-01-23 10:51 ` rguenth at gcc dot gnu.org

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