On 20 July 2011 21:35, Ulrich Weigand <uweig...@de.ibm.com> wrote:
> Ira Rosen wrote:
>
>> PR tree-optimization/49771
>> * gcc.dg/vect/pr49771.c: New test.
>
> This test fails (with wrong code) on spu-elf ...
>
>> +int
>> +foo (void)
>> +{
>> + int j;
>> + int i;
>> + for (i = 0; i < 1000; i++)
>> + for (j = 0; j < 1000; j++)
>> + a[j] = a[i] + 1;
>> + return a[0];
>> +}
>> +
>> +int
>> +main (void)
>> +{
>> + int res = foo ();
>> + if (res != 1999)
>> + abort ();
>> + return 0;
>> +}
>
> The return value of foo with vectorization is 1249 instead
> of 1999 for some reason.
I reproduced the failure. It occurs without Richard's
(http://gcc.gnu.org/ml/gcc-patches/2011-07/msg01022.html) and this
patches too. Obviously the vectorized loop is executed, but at the
moment I don't understand why. I'll have a better look on Sunday.
Ira
>
> Bye,
> Ulrich
>
> --
> Dr. Ulrich Weigand
> GNU Toolchain for Linux on System z and Cell BE
> ulrich.weig...@de.ibm.com
>
