https://gcc.gnu.org/bugzilla/show_bug.cgi?id=31862
Andrew Pinski changed:
What|Removed |Added
Component|middle-end |tree-optimization
--- Comment #26 from A
--- Comment #8 from pinskia at gmail dot com 2007-05-08 19:45 ---
Subject: Re: Loop IM and other optimizations harmful for -fopenmp
On 8 May 2007 18:08:26 -, jakub at gcc dot gnu dot org
<[EMAIL PROTECTED]> wrote:
>
>
> --- Comment #7 from jakub at gcc dot gnu dot org 2007-05-
--- Comment #7 from jakub at gcc dot gnu dot org 2007-05-08 19:08 ---
This really is not specific to OpenMP, I believe the following is valid
threaded program:
#define _XOPEN_SOURCE 600
#include
#include
int v;
pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER;
pthread_barrier_t b;
void
--- Comment #6 from pinskia at gmail dot com 2007-05-08 15:59 ---
Subject: Re: Loop IM and other optimizations harmful for -fopenmp
On 8 May 2007 14:44:16 -, dnovillo at acm dot org
<[EMAIL PROTECTED]> wrote:
> The original code did not have a race condition. The compiler
> transf
On 8 May 2007 14:44:16 -, dnovillo at acm dot org
<[EMAIL PROTECTED]> wrote:
The original code did not have a race condition. The compiler
transformations introduced a race-condition. This *is* a compiler
bug.
Actually the original code has a race condition, if another thread is
reading
--- Comment #5 from dnovillo at acm dot org 2007-05-08 15:44 ---
Subject: Re: Loop IM and other optimizations harmful for -fopenmp
On 8 May 2007 14:37:05 -, rguenth at gcc dot gnu dot org
<[EMAIL PROTECTED]> wrote:
> OMP is not a good generic programming model for threaded code.
--- Comment #4 from dnovillo at acm dot org 2007-05-08 15:39 ---
Subject: Re: Loop IM and other optimizations harmful for -fopenmp
On 8 May 2007 14:30:45 -, pinskia at gcc dot gnu dot org
<[EMAIL PROTECTED]> wrote:
> --- Comment #2 from pinskia at gcc dot gnu dot org 2007-05-
--- Comment #3 from rguenth at gcc dot gnu dot org 2007-05-08 15:37 ---
OMP is not a good generic programming model for threaded code. Exactly because
of this issues.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31862
--- Comment #2 from pinskia at gcc dot gnu dot org 2007-05-08 15:30 ---
WTF, this is just sad we have to disable optimizations because openmp folks
don't know how to program threaded code.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31862
--- Comment #1 from dnovillo at acm dot org 2007-05-08 14:10 ---
Subject: Re: New: Loop IM and other optimizations harmful for -fopenmp
On 8 May 2007 07:59:03 -, jakub at gcc dot gnu dot org
<[EMAIL PROTECTED]> wrote:
> See http://openmp.org/pipermail/omp/2007/000840.html
> and the
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