On Fri, Jun 23, 2017 at 03:22:13PM +0200, Richard Biener wrote:
> On Fri, 23 Jun 2017, Marc Glisse wrote:
>
> > On Fri, 23 Jun 2017, Richard Biener wrote:
> >
> > > The vectorizer is confused about the spurious VDEFs that are caused
> > > by gather vectorization so the following avoids them by making the
> > > builtins pure appropriately.
> > >
> > > Bootstrap / regtest pending on x86_64-unknown-linux-gnu, ok for
> > > trunk and branch?
> > >
> > > Thanks,
> > > Richard.
> > >
> > > 2017-06-23 Richard Biener <rguent...@suse.de>
> > >
> > > PR target/81175
> > > * config/i386/i386.c (struct builtin_isa): Add pure_p member.
> > > (def_builtin2): Initialize pure_p.
> > > (ix86_add_new_builtins): Honor pure_p.
> > > (def_builtin_pure): New function.
> >
> > If you svn update (or equivalent), you will notice that the above is already
> > available ;-)
>
> Sorry, that was the GCC 7 variant of the patch ... just scrap the
> already available pieces for trunk ;)
For GCC7, maybe it would be better to backport Marc's commit except perhaps
for the stmxcsr change and then backport your trunk patch on top of it.
Jakub
