[tree-ssa] string builtins strikes back

[law@redhat.com]

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.

jeff