Re: [PATCH]: further shrinking of boot2
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 rdiva...@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-unsubscr...@freebsd.org ___ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to freebsd-current-unsubscr...@freebsd.org
Re: [PATCH]: further shrinking of boot2
On Friday, November 21, 2014 01:56:32 PM Roman Divacky 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. I would prefer 'int k' over 'int i2/j2'. Also, do you really have to move the variable definitions to get the size change? I'd prefer to leave the variable declarations where they are if possible (and just add 'int k' or 'size_t k' in the existing variable blocks). -- John Baldwin ___ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to freebsd-current-unsubscr...@freebsd.org
Re: [PATCH]: further shrinking of boot2
Sure thing. Reload the patch from the same url. http://rys.vlakno.cz/~rdivacky/boot2.diet.patch On Fri, Nov 21, 2014 at 10:16:58AM -0500, John Baldwin wrote: On Friday, November 21, 2014 01:56:32 PM Roman Divacky 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. I would prefer 'int k' over 'int i2/j2'. Also, do you really have to move the variable definitions to get the size change? I'd prefer to leave the variable declarations where they are if possible (and just add 'int k' or 'size_t k' in the existing variable blocks). -- John Baldwin ___ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to freebsd-current-unsubscr...@freebsd.org
Re: [PATCH]: further shrinking of boot2
On Friday, November 21, 2014 08:39:17 PM Roman Divacky wrote: Sure thing. Reload the patch from the same url. http://rys.vlakno.cz/~rdivacky/boot2.diet.patch Thanks. I haven't run tested it, but I'm ok with it otherwise. -- John Baldwin ___ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to freebsd-current-unsubscr...@freebsd.org
Re: [PATCH]: further shrinking of boot2
On Fri, Nov 21, 2014 at 04:00:35PM -0500, John Baldwin wrote: On Friday, November 21, 2014 08:39:17 PM Roman Divacky wrote: Sure thing. Reload the patch from the same url. http://rys.vlakno.cz/~rdivacky/boot2.diet.patch Thanks. I haven't run tested it, but I'm ok with it otherwise. Thanks for the review. I'll wait a couple of days, hopefully someone will test the patch in a different way I did. Unless someone reports a breakage I'll commit this sometime next week. Thanks! Roman ___ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to freebsd-current-unsubscr...@freebsd.org
