[Bug c++/53672] gcc/branches/cilkplus does not like C++ spawn (when optimized)

["jjhforrest at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53672

--- Comment #3 from John Forrest <jjhforrest at gmail dot com> 2012-06-15 06:57:43 UTC ---
Balaji,

Attached - AbcMatrix.ii gives segfault using "compile"

There are more than a dozen places in my code where code such as -

>    for (int i=0;i<numberBlocks-1;i++)
>      which[i]=cilk_spawn pivotColumnDantzig(i,useRowCopy,updates,spare,best[i]);
>    which[numberBlocks-1]=pivotColumnDantzig(numberBlocks-1,useRowCopy,updates,
> 						       spare,best[numberBlocks-1]);
>    cilk_sync;
>

  inside a class such as AbcMatrix segfaults on compilation.  If I 
create a non class static function doWork(AbcMatrix * matrix, other 
stuff) and in that function do

which[i]=cilk_spawn(matrix,other stuff)

it works.  There is not much of an overhead but is ugly and time consuming.

Hope you can reproduce fault.

Regards,

John

On 14/06/12 17:56, bviyer at gmail dot com wrote:
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53672
>
> Balaji V. Iyer<bviyer at gmail dot com>  changed:
>
>             What    |Removed                     |Added
> ----------------------------------------------------------------------------
>                   CC|                            |bviyer at gmail dot com
>
> --- Comment #1 from Balaji V. Iyer<bviyer at gmail dot com>  2012-06-14 16:56:19 UTC ---
> Hello John,
>     This problem seem to be fixed as of this commit:
>
> git:0ac59c91905a106865589114d4e55f0c7f256874
> svn: revision:188147
>
> I tried your code and mine passes fine.
>
> Thanks,
>
> Balaji V. Iyer.
>