------- Comment #15 from law at redhat dot com 2006-02-25 18:31 -------
Subject: Re: [4.2 Regression] Forwardprop
does harm for VRP to figure out if a point is non zero
On Sat, 2006-02-25 at 17:31 +0000, pinskia at gcc dot gnu dot org wrote:
>
> ------- Comment #14 from pinskia at gcc dot gnu dot org 2006-02-25 17:31
> -------
> Why is forward prop doing this in the first place, this actually causes
> increased register pressure for sure, at least for non one use variables?
Because in the case of multiple-use it's removing a partial
redundancy.
I've already stated I believe I have a way to fix this. Please
be patient, there are more pressing matters to deal with first.
jeff
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26406
