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Re: [tree-ssa] string builtins strikes back
> In message <20031215233133.GB19896@atrey.karlin.mff.cuni.cz>, Jan Hubicka write
> s:
> >> On Thu, Dec 11, 2003 at 07:11:49PM +0100, Jan Hubicka wrote:
> >> > What would be best to cope with this?
> >>
> >> Re-gimplify.
> >
> >You mean re-gimplify after each fold call? (or just fold_builtins) Also
> >we probably need to extend fold_stmt API somewhat to allow it
> >introducing several statements instead of one (passing around block
> >iterator and returning pointer to first simplified?)
> I disagree with Richard's recommendation. If the folder gives us back
> something that is not gimple, then we shouldn't use it -- at least not
> at this time, we might want to re-gimplify such things in some cases.
>
> Rather than build the bits to re-gimplify, I'd first look much closer at
> why the folder gave us back something which was not gimple.
See original mail. THe problem comes from string strlen folder that
looks up for argument that contains a cast, casts is into sizetype and
cast it back. We end up with nested expression containing multiple
casts.
Honza
>
> jeff
>