Loop optimizer issues

[Zack Weinberg]

law@redhat.com writes:

>  >Actually, I *am* arguing for merging all of rtlopt into *somewhere*,
>  >because the code on the rtlopt branch dies when tree-ssa hits
>  >mainline, so either it gets merged somewhere now or we lose all that
>  >work.
>
> I simply can't support merging all of rtlopt into the SSA branch.
> It makes a ton of work for us with little benefit to the SSA
> project.
>
> I would consider merging generic code which does analysis and
> transformations on the CFG, but merging all of rtlopt just doesn't
> make sense for the SSA branch.

I'm thinking here about what makes sense for the project in general,
and I'm sorry, but my conclusion is that either someone (mainline or
tree-ssa) has to take the pain of a merge now, or else we lose the
work gone into the rtlopt branch.

zw