[Bug tree-optimization/62171] restrict pointer to struct with restrict pointers parm doesn't prevent aliases

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62171

--- Comment #15 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to ncahill_alt from comment #14)
> This test is failing for me in GCC 6.1.0 (i386).  It complains about having
> no vectype.
> 
> Why that is, I don't know.  But it doesn't seem to be a problem otherwise,
> it seems pretty safe to ignore except that it could vectorize the loop but
> doesn't.
> 
> I wonder if it would be easier just to have this be UNSUPPORTED on i386.

It should be by means of the { dg-require-effective-target vect_double }
directive.  Does it work if you remove the { dg-options ... } one?