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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/63660] -Wmaybe-uninitialized false positive (uninit pass limits)
Date: Wed, 31 Mar 2021 02:17:43 +0000	[thread overview]
Message-ID: <bug-63660-4-QuPlJC0l0I@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-63660-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63660

Martin Sebor <msebor at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |msebor at gcc dot gnu.org
      Known to fail|4.8.3, 4.9.2, 5.0           |10.2.0, 11.0, 4.8.4, 4.9.4,
                   |                            |5.5.0, 6.4.0, 7.2.0, 8.3.0,
                   |                            |9.1.0
   Last reconfirmed|2014-10-28 00:00:00         |2021-3-30

--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Reconfirmed with GCC 11.  The limits don't come into play here.  There is an
uninitialized use in a PHI in the IL:

  <bb 22> [local count: 1073741824]:
  # xj_35 = PHI <xj_45(D)(53), xj_24(21)>
  # .MEM_55 = PHI <.MEM_54(53), .MEM_77(21)>
  if (m_3 > 63)
    goto <bb 54>; [51.12%]
  else
    goto <bb 23>; [48.88%]
  ...
  <bb 42> [local count: 262422500]:
  # .MEM_88 = VDEF <.MEM_64>
  x_25->j = xj_35;

  parent reply	other threads:[~2021-03-31  2:17 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-10-27 18:32 [Bug driver/63660] New: [4.8-4.9+] -Wmaybe-uninitialized false positive with -O1 and more ed0.88.prez at gmail dot com
2014-10-28  9:04 ` [Bug tree-optimization/63660] " rguenth at gcc dot gnu.org
2014-12-03 14:15 ` [Bug tree-optimization/63660] -Wmaybe-uninitialized false positive (uninit pass limits) ed0.88.prez at gmail dot com
2014-12-03 14:52 ` manu at gcc dot gnu.org
2021-03-31  2:17 ` msebor at gcc dot gnu.org [this message]
2022-08-30  8:01 ` [Bug tree-optimization/63660] -Wmaybe-uninitialized false positive on many repeated bitwise tests rguenth at gcc dot gnu.org
2022-08-30  8:05 ` cvs-commit at gcc dot gnu.org

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