Richard Guenter wrote:
> On Thu, Mar 8, 2012 at 3:29 PM, Ulrich Weigand <uweig...@de.ibm.com> wrote:
> > I'm wondering where to go from there:
> > - Why are those special re-association cases handled only in forwprop,
> > and not in fold-cost? I would have expected forwprop to just propagate
> > subexpressions into a tree and then use fold-const to actually simplify ...
> We are moving away from GENERIC expression simplification towards
> simplifications/combines on GIMPLE SSA (Andrew Pinski is working
> on this a lot on his branch at the moment).
OK, I see.
> > - Should I try to improve forwprop to handle casts and additional re-
> > association cases until it handles the above expression?
> Yes, ideally by trying to sub-divide this task into separate profitable
> transforms. Maybe Andrew can chime in here?
Thanks, I'll try to have a look into this direction ...
Dr. Ulrich Weigand
GNU Toolchain for Linux on System z and Cell BE