From: Adam Majer <adamm@galacticasoftware.com>
To: Joao Seabra <seabra@aac.uc.pt>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Kernel GCC Optimizations
Date: Wed, 25 Dec 2002 00:16:41 -0600 [thread overview]
Message-ID: <20021225061641.GA6351@mira.lan.galacticasoftware.com> (raw)
In-Reply-To: <Pine.LNX.4.33.0212221322260.12768-100000@ci.aac.uc.pt>
On Sun, Dec 22, 2002 at 01:23:08PM +0000, Joao Seabra wrote:
> Rename registers from the gcc 3.2 man:
> "Attempt to avoid false dependencies in scheduled code by making
> use of registers left over after register allocation. This
> optimization will most benefit processors with lots of
> registers. It can, however, make debugging impossible, since
> variables will no longer stay in a "home register"."
Just to be blunt here :), i386 is not one of these register rich
archs. So it will probably not help you to compile with -O3... Of course
you could have something else...
- Adam
next prev parent reply other threads:[~2002-12-25 6:09 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-12-22 13:23 Kernel GCC Optimizations Joao Seabra
2002-12-25 6:16 ` Adam Majer [this message]
-- strict thread matches above, loose matches on Subject: below --
2002-12-21 17:35 Ro0tSiEgE
2002-12-21 18:08 ` axel
2002-12-21 22:13 ` folkert
2002-12-21 18:11 ` John Bradford
2002-12-21 22:10 ` folkert
2002-12-21 22:44 ` John Bradford
2002-12-22 7:57 ` Zack Weinberg
2002-12-22 1:20 ` scott thomason
2002-12-22 1:26 ` Arnaldo Carvalho de Melo
2002-12-22 1:26 ` Robert Love
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