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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgomp/52348] OpenMP incorrectly parallelizes loops (wrong iteration count)
Date: Thu, 23 Feb 2012 10:08:00 -0000	[thread overview]
Message-ID: <bug-52348-4-WqDgMDZiiZ@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-52348-4@http.gcc.gnu.org/bugzilla/>

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52348

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2012-02-23
            Summary|[4.5/4.6/4.7] OpenMP        |OpenMP incorrectly
                   |incorrectly parallelizes    |parallelizes loops (wrong
                   |loops (wrong iteration      |iteration count)
                   |count)                      |
     Ever Confirmed|0                           |1
      Known to fail|                            |4.3.6, 4.4.6, 4.5.3, 4.6.2,
                   |                            |4.7.0

--- Comment #2 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-02-23 09:58:24 UTC ---
With 4.3.x we warned

testcase.c: In function 'main':
testcase.c:26: warning: iteration variable 'x' is unsigned

and up to 4.6.2 we produce

INT32_MAX: 0 / 65535
UINT32_MAX: 32768 / 65535

but on trunk (4.7) we say

INT32_MAX: 0 / 65535
UINT32_MAX: 65535 / 65535

Confirmed that ICC produces

INT32_MAX: 65535 / 65535
UINT32_MAX: 65535 / 65535


  parent reply	other threads:[~2012-02-23  9:58 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-02-23  9:22 [Bug libgomp/52348] New: [4.5/4.6] " ua_gcc_bugzilla@binary-island.eu
2012-02-23  9:53 ` [Bug libgomp/52348] [4.5/4.6/4.7] " ua_gcc_bugzilla@binary-island.eu
2012-02-23 10:08 ` rguenth at gcc dot gnu.org [this message]
2012-02-23 10:29 ` [Bug libgomp/52348] " ua_gcc_bugzilla@binary-island.eu
2012-02-23 10:39 ` [Bug libgomp/52348] [4.5/4.6/4.7] " jakub at gcc dot gnu.org
2012-02-23 10:47 ` ua_gcc_bugzilla@binary-island.eu

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