Re: [patch] Predictive commoning, updated

["Daniel Berlin" <dberlin at dberlin dot org>]

On 5/9/07, Dorit Nuzman <DORIT@il.ibm.com> wrote:
> Hi Zdenek,
>
> First of all: Wow.
>
> Second, about:
> >    However, this second analysis delivers somewhat different results (it
> >    only analyses the behavior of the memory reference in the innermost
> >    loop, not any deeper loop nest);
>
> this is something I just discovered in the context of outer-loop
> vectorization, and that surprized me too. I thought the intention is that
> find_data_references_in_loop(loop) would compute the DRs relative to the
> loop in question, rather than always relative to the immediately containing
> loop.

No. It was always relative to the immediately containing loop, because
it was originally written to handle nested loops only.  The only
reason the other analysis worked is because the only user was the
vectorizer.