Loop optimizer issues

[Zdenek Dvorak]

Hello,

> Op ma 28-07-2003, om 00:58 schreef David Edelsohn:
> > 	If this is a rewrite of the RTL loop optimizer, could it go on the
> > GCC 3.4 trunk?
> 
> Hmm, mainline is in stage 2, so itn't that too late?  According to the
> development plan, "During this period, major changes may not be merged
> from branches".  This would be a major change from a branch.
> 
> Also, look at the deficiencies list.  Can all those missing pieces be
> provided in time for 3.4?

the answer is basically no -- i.e. I could, but if it is to be in some
reasonable time (so that the developement plan is not heavily violated),
it could hardly be considered enough tested.  Anyway, this change would
be way too much intrusive for current stage of development, IMO.

> (Do they make a difference?)

some of them do.  Especially handling of subregs is not really good now,
which would result in regressions on some 64-bit systems.

Zdenek