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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/53265] Warn when undefined behavior implies smaller iteration count
Date: Tue, 12 Mar 2013 21:48:00 -0000	[thread overview]
Message-ID: <bug-53265-4-TljvOF4PTa@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-53265-4@http.gcc.gnu.org/bugzilla/>


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53265

--- Comment #22 from Jakub Jelinek <jakub at gcc dot gnu.org> 2013-03-12 21:47:38 UTC ---
Short C testcase reproducing the exp_ch7.adb issue (for -O2):
void bar (int);

__attribute__((noinline)) static int
foo (int x)
{
  int i = 1;
  if (x > 1)
    do
      bar (i);
    while (++i != x);
}

void
baz (void)
{
  foo (1);
  foo (1);
  foo (1);
}


  parent reply	other threads:[~2013-03-12 21:48 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-05-07 14:09 [Bug tree-optimization/53265] New: " amonakov at gcc dot gnu.org
2012-05-07 14:21 ` [Bug tree-optimization/53265] " rguenth at gcc dot gnu.org
2013-01-29 17:23 ` jakub at gcc dot gnu.org
2013-01-31 12:13 ` jakub at gcc dot gnu.org
2013-03-11 10:15 ` rguenth at gcc dot gnu.org
2013-03-11 14:14 ` rguenth at gcc dot gnu.org
2013-03-11 14:16 ` rguenth at gcc dot gnu.org
2013-03-11 14:17 ` rguenth at gcc dot gnu.org
2013-03-11 15:49 ` jakub at gcc dot gnu.org
2013-03-11 15:59 ` rguenth at gcc dot gnu.org
2013-03-11 16:16 ` amonakov at gcc dot gnu.org
2013-03-11 16:42 ` manu at gcc dot gnu.org
2013-03-11 16:50 ` manu at gcc dot gnu.org
2013-03-11 17:11 ` jakub at gcc dot gnu.org
2013-03-12 11:25 ` jakub at gcc dot gnu.org
2013-03-12 11:26 ` jakub at gcc dot gnu.org
2013-03-12 11:30 ` jakub at gcc dot gnu.org
2013-03-12 11:48 ` jakub at gcc dot gnu.org
2013-03-12 12:37 ` jakub at gcc dot gnu.org
2013-03-12 12:41 ` jakub at gcc dot gnu.org
2013-03-12 14:15 ` jakub at gcc dot gnu.org
2013-03-12 20:10 ` jakub at gcc dot gnu.org
2013-03-12 21:48 ` jakub at gcc dot gnu.org [this message]
2013-03-13 10:36 ` jakub at gcc dot gnu.org
2013-03-13 11:01 ` rguenth at gcc dot gnu.org
2013-03-14  9:14 ` jakub at gcc dot gnu.org
2013-03-14 10:55 ` jakub at gcc dot gnu.org
2013-04-29 23:18 ` ppluzhnikov at google dot com
2013-04-30  6:07 ` jakub at gcc dot gnu.org
2013-04-30  6:46 ` jakub at gcc dot gnu.org
2014-02-16 13:14 ` jackie.rosen at hushmail dot com
2023-06-09 16:52 ` pinskia at gcc dot gnu.org

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