This is the mail archive of the
gcc@gcc.gnu.org
mailing list for the GCC project.
Re: Why can't CSE recognize const_int's in HIGH LO_SUM pair?
Richard Henderson <rth@redhat.com> writes:
> On Mon, Sep 10, 2001 at 02:09:00PM -0400, Daniel Berlin wrote:
> > Without rematerialization, or live range splitting, we'd spill twice
>> as much as we would before here.
>
> But reload _does_ do simple rematerialization. See
> reg_equiv_constant.
Right, but it's very *simple* rematerialization.
I had some numbers somewhere that said we do so much better with
advanced remat it's not even funny, but i don't recall them exactly,
so i don't want to quote them.
>
>
>
> r~
--
"There's a fine line between fishing and standing on the shore
looking like an idiot.
"-Steven Wright