From mboxrd@z Thu Jan  1 00:00:00 1970
From: law@redhat.com
To: Richard Henderson <rth@redhat.com>
Cc: John David Anglin <dave@hiauly1.hia.nrc.ca>, Bernd Schmidt <bernds@redhat.com>, gcc@gcc.gnu.org
Subject: Re: Why can't CSE recognize const_int's in HIGH LO_SUM pair? 
Date: Mon, 10 Sep 2001 10:28:00 -0000
Message-id: <25601.1000142996@localhost.localdomain>
References: <20010910095948.A8881@redhat.com>
X-SW-Source: 2001-09/msg00380.html

  In message < 20010910095948.A8881@redhat.com >you write:
  > The thing I like about exposing the split early is that
  > gcse gets to move these expressions around.  If you expose
  > the split later, nothing is going to move the parts around
  > as aggressively.
True.  But with the way things are currently implemented I don't think
we actually lose anything on the PA by not exposing the subexpressions
to gcse.  Instead of commonizing the HIGH and LO_SUM parts with other
idential ones elsewhere, we end up commonizing (set (reg) (const_int))


jeff