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Re: GCC 4.4.0 Status Report (2008-11-27)


On Tue, 9 Dec 2008, Vladimir Makarov wrote:
> Hans-Peter Nilsson wrote:
> > Vladimir, have you had chance to look at supporting
> > LOAD_EXTEND_OP (implicit sign-extension) in IRA?
> > <http://gcc.gnu.org/ml/gcc/2008-10/msg00458.html>
> > I'm guessing no, but hope it's not forgotten.
> It seems I missed that, sorry.  I'll look at the problem on this week.
>
> May be a patch I committed today solves the problem (it permits to work IRA
> without defining IRA_COVER_CLASSES).  I'll check it later.

For the record, the issue there, isn't really how to define
IRA_COVER_CLASSES, (so I guess "no"), it's whether the
transformations combine does, that uses LOAD_EXTEND_OP (i.e.
whether reads from memory are implicitly extended), are handled
by the register allocator.

brgds, H-P


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