Date: Fri, 21 Nov 2014 13:07:43 +0000 From: David Chisnall <theraven@FreeBSD.org> To: Roman Divacky <rdivacky@vlakno.cz> Cc: current@freebsd.org Subject: Re: [PATCH]: further shrinking of boot2 Message-ID: <B3DCBD7E-93AD-4601-A7D9-F8C6EEB4CA1F@FreeBSD.org> In-Reply-To: <20141121125632.GA23706@vlakno.cz> References: <20141121125632.GA23706@vlakno.cz>
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Fir the clang 3.4 import, I had some patches (that never got applied), which used clang -O0 and then opt with some custom optimisation order to get a reasonable size saving. It might be worth trying that, so that future changes to the default optimisation order don't make things worse again. David On 21 Nov 2014, at 12:56, Roman Divacky <rdivacky@vlakno.cz> wrote: > Hi all! > > In an effort to help import clang3.5 I looked at squeezing a few more bytes > from boot2. > > > http://rys.vlakno.cz/~rdivacky/boot2.diet.patch > > > Please test and review the patch. It survived my qemu boot attempt so it's > not completely broken. But I would like to have some more testing and review > comments before I move forward with this. > > Fwiw, it shrinks boot2 by 16 bytes when compiled with clang34 and by 28 bytes > when compiled with clang35. > > Thanks! Roman > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org"help
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