[PATCH, rs6000] Partial fix for PR65546 (GCC 6)
Bill Schmidt
wschmidt@linux.vnet.ibm.com
Thu Jan 28 17:56:00 GMT 2016
Actually, please hold off on this. The test in general is just faulty.
I'll get something more complete later on.
Sorry for the noise,
Bill
On Thu, 2016-01-28 at 11:45 -0600, Bill Schmidt wrote:
> Hi,
>
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65546 discusses the failure
> of gcc.dg/vect/costmodel/ppc/costmodel-vect-31a.c. The test fails
> differently on GCC 4.9 and 5 than it does on GCC 6. For GCC 6, the test
> case is faulty, as we only expect to see the "vectorization not
> profitable" statement when misaligned loads/stores are not efficient on
> the target hardware. This patch fixes the test for GCC 6.
>
> Something else is going on in the earlier releases, which I plan to look
> at separately.
>
> Verified on powerpc64le-unknown-linux-gnu. Is this okay for trunk?
>
> Thanks,
> Bill
>
>
> 2016-01-28 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
>
> PR target/65546
> * gcc.dg/vect/costmodel/ppc/costmodel-vect-31a.c: Disable check
> for "vectorization not profitable" when the target supports
> misaligned loads and stores.
>
>
> Index: gcc/testsuite/gcc.dg/vect/costmodel/ppc/costmodel-vect-31a.c
> ===================================================================
> --- gcc/testsuite/gcc.dg/vect/costmodel/ppc/costmodel-vect-31a.c (revision 232890)
> +++ gcc/testsuite/gcc.dg/vect/costmodel/ppc/costmodel-vect-31a.c (working copy)
> @@ -46,5 +46,5 @@ int main (void)
> return main1 ();
> }
>
> -/* { dg-final { scan-tree-dump-times "vectorization not profitable" 1 "vect" } } */
> +/* { dg-final { scan-tree-dump-times "vectorization not profitable" 1 "vect" { target { ! vect_hw_misalign } } } } */
> /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 0 "vect" { target { ! vect_hw_misalign } } } } */
>
>
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