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Re: [lno] Avoid use of rewrite_ssa_into_ssa in loop header copying
Hello,
> >>For example, the most "common" symptom is an ICE in
> >>find_or_generate_expression.
> >>This almost always means something has been marked as anticipated that
> >>isn't actually available where we think it is anticipated. This is
> >>either due to incorrect value numbering,
> >
> >my patch hardly does anything with VN, so let's put this aside for now,
> >
>
> The testcase you gave me is fixed already on the mainline, it was a
> known VN problem from that version of PRE .
> I merged the latest tree-ssa-pre (and tree-vn.c and associated changes)
> to lno-branch, and it doesn't fail anymore.
> Since they are a bit invasive, i'll just wait for a full merge to lno
> to happen, rather than commit this and cause conflicts.
great, thanks a lot for your help. I will try to do the merge sometimes
during the next week (hopefully tomorrow, but I am quite busy just now),
and reenable the PRE then.
Zdenek