From owner-freebsd-hackers  Fri Jun  6 15:59:13 1997
Return-Path: <owner-hackers>
Received: (from root@localhost)
          by hub.freebsd.org (8.8.5/8.8.5) id PAA17562
          for hackers-outgoing; Fri, 6 Jun 1997 15:59:13 -0700 (PDT)
Received: from godzilla.zeta.org.au (godzilla.zeta.org.au [203.2.228.19])
          by hub.freebsd.org (8.8.5/8.8.5) with ESMTP id PAA17554
          for <freebsd-hackers@freebsd.org>; Fri, 6 Jun 1997 15:59:11 -0700 (PDT)
Received: (from bde@localhost) by godzilla.zeta.org.au (8.8.5/8.6.9) id IAA18824; Sat, 7 Jun 1997 08:57:53 +1000
Date: Sat, 7 Jun 1997 08:57:53 +1000
From: Bruce Evans <bde@zeta.org.au>
Message-Id: <199706062257.IAA18824@godzilla.zeta.org.au>
To: bde@zeta.org.au, token@wicx50.informatik.uni-wuerzburg.de
Subject: Re: gcc -m486, gcc -O2
Cc: freebsd-hackers@freebsd.org
Sender: owner-hackers@freebsd.org
X-Loop: FreeBSD.org
Precedence: bulk

>> -O2 is sometimes a pessimization.  `-O2 -m486' was suggested in 1994.
>> It is wronger now.
>
>Yes, but in 1994 the kernel was compiled with gcc 2.6.3 or older.
>Now fbsd uses 2.7.2.1 - is the situation still the same with the
>newer compiler?

Yes, 2.7.2.1 generates essentially the same i386 code as 2.6.3.

Bruce