Gentoo Archives: gentoo-dev

From: Werner Van Belle <werner.van.belle@××××××.be>
To: Sven Vermeulen <swift@g.o>, gentoo-dev@g.o
Subject: Re: [gentoo-dev] -fbranch-probabilities optimisation
Date: Sat, 17 May 2003 12:33:50
In Reply to: Re: [gentoo-dev] -fbranch-probabilities optimisation by Sven Vermeulen
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 portage. > > 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 - -fbranch-probabilities - -- Werner,- -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux) iD8DBQE+xde8xiU3uL/NdUYRAiP6AJ0QjEGvQS4QdmjIbQc5GkyILTjp5wCfSQQM 5uusj7sl82+ITMRc9xcEaD4= =eiol -----END PGP SIGNATURE----- -- gentoo-dev@g.o mailing list


Subject Author
Re: [gentoo-dev] -fbranch-probabilities optimisation Sven Vermeulen <swift@g.o>