[PATCH, testsuite] Fix gcc.dg/vect/pr59354.c

[Jakub Jelinek]

On Fri, Feb 27, 2015 at 09:08:30AM +0100, Richard Biener wrote:
> On Fri, Feb 27, 2015 at 12:34 AM, Pat Haugen
> <pthaugen@linux.vnet.ibm.com> wrote:
> > The subject testcase is failing on older powerpc64 hardware that doesn't
> > support vector instructions because the prolog code is saving callee save
> > vector registers used in the loop before the check_vect() call has even been
> > performed. Following was tested on powerpc64-linux. Ok for trunk/4.9 branch?
> 
> Hum.  So the whole check_vect business is unreliable on ppc64?  I'd rather
> make sure to not run the tests at all on older ppc hardware then?
> 
> Well.  Ok.

I think the separate main containing just check_vect and call to a noinline
function is very much desirable, otherwise it works purely by accident if it
works at all, IMHO on all arches.

	Jakub