RFR(M): 8080289: Intermediate writes in a loop not eliminated by optimizer

[Vitaly Davidovich]

Hi Roland,

So what does the graph look like for this example?

sent from my phone
On Jun 23, 2015 6:50 AM, "Roland Westrelin" <roland.westrelin at oracle.com>
wrote:

>
> >> What about
> >>
> >> volatile int y;
> >> volatile int x;
> >>
> >> y=1
> >> x=1
> >> y=2
> >>
> >> transformed to:
> >>
> >> x=1
> >> y=2
> >>
> >> ?
> >
> > I think this is not allowed, since operations over "x" get tied up in
> > the synchronization order.
>
> Thanks. Then for support_IRIW_for_not_multiple_copy_atomic_cpu true, I
> don’t see how incorrect reordering is prevented.
>
> Roland.
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