On Sun, 2007-03-25 at 22:24 -0700, Andrew Pinski wrote:
> On 3/25/07, Charles J. Tabony <[EMAIL PROTECTED]> wrote:
> > > So I think that the easiest way to integrate this with the rest of the
> > > compiler is to have a target hook that emits trees to compute SHIFT, INV1
> > > and INV2.
>
> I don'
On 3/25/07, Charles J. Tabony <[EMAIL PROTECTED]> wrote:
> So I think that the easiest way to integrate this with the rest of the
> compiler is to have a target hook that emits trees to compute SHIFT, INV1
> and INV2.
I don't think target hooks to expand trees early is a good idea. RTL
is not
> So I think that the easiest way to integrate this with the rest of the
> compiler is to have a target hook that emits trees to compute SHIFT, INV1
> and INV2.
(define_tree_expand "name"
"condition"
{
preparation statements;
}
)
:-)
The strategy that the SHMEDIA port uses to do cse and loop invariant code
motion for division by invariant reciprocal can in principle be used by
any processor that has a reasonable fast instructions for count leading
sign bits (can be substituted with count leading zero bits), widening
or highpart
