Date: Tue, 19 Nov 2013 11:27:56 +0100 From: Dimitry Andric <dim@FreeBSD.org> To: Matthias Andree <mandree@FreeBSD.org> Cc: freebsd-toolchain@freebsd.org Subject: Re: clang++ 3.3 issue (excessively slow compile vs. gcc 4.6 in just one file of a port) Message-ID: <B6CE2918-D5FD-4B6F-AD56-EF309CB05415@FreeBSD.org> In-Reply-To: <528B1CF5.4020706@FreeBSD.org> References: <528A8481.9010200@FreeBSD.org> <62194A12-1B41-48F6-8434-BA2181411020@FreeBSD.org> <528A93BF.3020707@FreeBSD.org> <C350407E-E262-4E47-B1A5-09F5374C1AED@FreeBSD.org> <528A9A88.80904@FreeBSD.org> <EF23C57E-DA99-4655-A260-FE0732476304@FreeBSD.org> <528B1CF5.4020706@FreeBSD.org>
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--Apple-Mail=_A6A80C7C-84BD-40E8-B006-16C7DCF7E3A0 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=iso-8859-1 On 19 Nov 2013, at 09:10, Matthias Andree <mandree@FreeBSD.org> wrote: > Am 19.11.2013 08:49, schrieb Dimitry Andric: ... >> Ok, this looks like http://llvm.org/PR16474 , which has a relatively >> simple fix. I have attached it, can you please try it out? You can >> just apply the patch to /usr/src and do: >> >> make -C /usr/src/lib/clang >> make -C /usr/src/usr.bin/clang/clang >> sudo make -C /usr/src/usr.bin/clang/clang install >> >> It should basically recompile just one file, and re-link the clang >> executable. I tried building ipsharpen.ii at -O3, and it uses about >> 20 seconds now (on my relatively slow VM). > > Dimitry, > > thanks. > > The patch speeds up the compile by one and a half orders of magnitude, > and we're down to 30 s for my VM and compiling the .ii file. > > The .cc now compiles in 22 s, rather than 500 s. > > Excellent, problem solved! > > Can we commit this (what the LLVM PR calls "regression") fix so it > becomes part of 10.0-RELEASE? I will commit it to head tonight, and after the normal MFC period of 3 days I will ask re@ to approve merging it to stable/10. -Dimitry --Apple-Mail=_A6A80C7C-84BD-40E8-B006-16C7DCF7E3A0 Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=signature.asc Content-Type: application/pgp-signature; name=signature.asc Content-Description: Message signed with OpenPGP using GPGMail -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.22 (Darwin) iEYEARECAAYFAlKLPTgACgkQsF6jCi4glqNqaACggqtpFy1JivxLw9yedA/XsISd D3MAoP5ps0Y78aIuRlYcOmdUU9IQxGLg =THdV -----END PGP SIGNATURE----- --Apple-Mail=_A6A80C7C-84BD-40E8-B006-16C7DCF7E3A0--
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