http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53436
--- Comment #9 from Andrew Pinski 2012-05-24
22:34:30 UTC ---
(In reply to comment #8)
> You cannot invoke the C99 standard when there is concurrency in your program,
> as the standard doesn't deal with it at all.
Though C++11/C11 does but we do
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53436
Eric Botcazou changed:
What|Removed |Added
CC||ebotcazou at gcc dot
|
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53436
--- Comment #7 from Jakub Jelinek 2012-05-22
10:01:11 UTC ---
What GCC did was wrong. But your testcase is clearly invalid as per
OpenMP 3.1, 1.4.1:
"Similarly, if at least one thread reads from a memory unit and at least one
thread writes witho
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53436
--- Comment #6 from o.mangold at googlemail dot com 2012-05-22 08:32:03 UTC ---
Yes, I get, that it's not a good way to do things, as (among other reasons) a
volatile access is no memory fence. So accesses to other locations may not be
ordered. But
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53436
--- Comment #5 from Jakub Jelinek 2012-05-22
07:59:01 UTC ---
(In reply to comment #4)
> (In reply to comment #3)
> > The testcase is not valid OpenMP, there is no flush operation in between the
> > store and reads,
>
> Is that also needed with
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53436
--- Comment #4 from o.mangold at googlemail dot com 2012-05-22 07:45:46 UTC ---
(In reply to comment #3)
> The testcase is not valid OpenMP, there is no flush operation in between the
> store and reads,
Is that also needed with volatile variables
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53436
Jakub Jelinek changed:
What|Removed |Added
Status|UNCONFIRMED |RESOLVED
CC|
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53436
--- Comment #2 from Jakub Jelinek 2012-05-21
21:06:19 UTC ---
Author: jakub
Date: Mon May 21 21:06:13 2012
New Revision: 187742
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=187742
Log:
PR tree-optimization/53436
* omp-low.c (omp
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53436
--- Comment #1 from Jakub Jelinek 2012-05-21
21:05:39 UTC ---
Author: jakub
Date: Mon May 21 21:05:33 2012
New Revision: 187741
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=187741
Log:
PR tree-optimization/53436
* omp-low.c (omp
