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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/53239] [4.7 Regression] VRP vs named value return opt
Date: Fri, 04 May 2012 22:03:00 -0000	[thread overview]
Message-ID: <bug-53239-4-O0BtWjDSZF@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-53239-4@http.gcc.gnu.org/bugzilla/>

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53239

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |wrong-code
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2012-05-04
          Component|c++                         |middle-end
            Summary|[4.7 Regression] -ftree-vrp |[4.7 Regression] VRP vs
                   |breaks min()                |named value return opt
     Ever Confirmed|0                           |1

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-05-04 22:02:59 UTC ---
Actually the following is what is being removed:
  if (D.36751_45 < 0)
    goto <bb 6>;
  else
    goto <bb 7>;

<bb 6>:

<bb 7>:
  # D.36747_44 = PHI <<retval>_2(D)(6), &D.35100(5)>

So it is not VRP really as it is doing something fine.  It is just we say
<retval>_2 is uninitialized.


  parent reply	other threads:[~2012-05-04 22:03 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-05-04 21:41 [Bug c++/53239] New: [4.7 Regression] -ftree-vrp breaks min() proski at gnu dot org
2012-05-04 21:43 ` [Bug c++/53239] " proski at gnu dot org
2012-05-04 21:54 ` pinskia at gcc dot gnu.org
2012-05-04 21:55 ` pinskia at gcc dot gnu.org
2012-05-04 22:03 ` pinskia at gcc dot gnu.org [this message]
2012-05-04 23:21 ` [Bug middle-end/53239] [4.7 Regression] VRP vs named value return opt hjl.tools at gmail dot com
2012-05-07  3:22 ` proski at gnu dot org
2012-05-07  7:14 ` [Bug tree-optimization/53239] " jakub at gcc dot gnu.org
2012-05-07  7:27 ` jakub at gcc dot gnu.org
2012-05-07  9:35 ` rguenth at gcc dot gnu.org
2012-05-07  9:38 ` rguenth at gcc dot gnu.org
2012-05-07 12:36 ` proski at gnu dot org
2012-05-07 13:24 ` [Bug tree-optimization/53239] [4.7/4.8 " hjl.tools at gmail dot com
2012-05-07 13:33 ` dak at gnu dot org
2012-05-07 13:33 ` jakub at gcc dot gnu.org
2012-05-07 13:34 ` jakub at gcc dot gnu.org
2012-05-16 15:58 ` jakub at gcc dot gnu.org

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