From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 23135 invoked by uid 1002); 17 May 2003 12:33:50 -0000 Mailing-List: contact gentoo-dev-help@gentoo.org; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-dev@gentoo.org Received: (qmail 10932 invoked from network); 17 May 2003 12:33:50 -0000 From: Werner Van Belle Reply-To: werner.van.belle@vub.ac.be Organization: Vrije Universiteit Brussel To: Sven Vermeulen , gentoo-dev@gentoo.org Date: Sat, 17 May 2003 08:33:30 +0200 User-Agent: KMail/1.5 References: <20030517024911.GA6515@vaughan.foofalicious.com> <20030517114304.GD2599@Daikan.pandora.be> In-Reply-To: <20030517114304.GD2599@Daikan.pandora.be> MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-15" Content-Transfer-Encoding: quoted-printable Content-Description: clearsigned data Content-Disposition: inline Message-Id: <200305170833.33013.werner.van.belle@vub.ac.be> Subject: Re: [gentoo-dev] -fbranch-probabilities optimisation X-Archives-Salt: 93ad9a37-11f4-4fd9-834c-6fc95d2d1efb X-Archives-Hash: 8b5b3fa759d8d66262dc44b790d87b38 =2D----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Saturday 17 May 2003 13:43, Sven Vermeulen wrote: > On Sat, May 17, 2003 at 03:49:11AM +0100, Chris Davies wrote: > > I had the idea to build -fbranch-probabilities optimisation into portag= e. > > This is where a sample run of data is taken using the program compiled > > with -fprofile-arcs, and that data then used to reorganise the object > > code so conditional branches are layed out in a more efficient manner. > > Why implement it in Portage? Isn't it up to the user to define it in the > CFLAGS or not? This won't be possible because if you want this optimisation you have: a) To compile the program with -fprofile-arcs b) Run the program c) Recompile the program with the same optimisations but with=20 =2D -fbranch-probabilities =2D -- Werner,- =2D----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux) iD8DBQE+xde8xiU3uL/NdUYRAiP6AJ0QjEGvQS4QdmjIbQc5GkyILTjp5wCfSQQM 5uusj7sl82+ITMRc9xcEaD4=3D =3Deiol =2D----END PGP SIGNATURE----- -- gentoo-dev@gentoo.org mailing list