Date: Sat, 23 Feb 2013 01:53:32 +0200 From: Konstantin Belousov <kostikbel@gmail.com> To: Dimitry Andric <dim@FreeBSD.org> Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org Subject: Re: svn commit: r247166 - head/contrib/llvm/tools/clang/lib/Driver Message-ID: <20130222235332.GB2454@kib.kiev.ua> In-Reply-To: <201302222240.r1MMeAsu042087@svn.freebsd.org> References: <201302222240.r1MMeAsu042087@svn.freebsd.org>
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[-- Attachment #1 --] On Fri, Feb 22, 2013 at 10:40:10PM +0000, Dimitry Andric wrote: > Author: dim > Date: Fri Feb 22 22:40:10 2013 > New Revision: 247166 > URL: http://svnweb.freebsd.org/changeset/base/247166 > > Log: > Pull in r172354 from upstream clang trunk: > > Refactor the x86 CPU name logic in the driver and pass -march and -mcpu > flag information down from the Clang driver into the Gold linker plugin > for LTO. This allows specifying -march on the linker commandline and > should hopefully have it pass all the way through to the LTO optimizer. > > Fixes PR14697. > > Pull in r175919 from upstream clang trunk: > > Driver: Pass down the -march setting down to -cc1as on x86 too. > > The assembler historically didn't make use of any target features, but this has > changed when support for old CPUs that don't support long nops was added. > > This should fix the long nops that still occurred in crt*.o, and > possibly other object files, if the system was compiled for a CPU that > does not support those, such as Geode. > > Note that gcc on i386 also does not pass through any -march, -mcpu or > -mtune setting to gas, but this has not caused any trouble yet, because > gas defaults to i386. Are you saying that assembler (in the 'cc' invocation) miscompiles the .s files on i386 ? Why does it use instructions by default which are not supported on the i486 architecture, implicitely ? [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.19 (FreeBSD) iQIcBAEBAgAGBQJRKAT7AAoJEJDCuSvBvK1BIIMP+wUvTv0DjRxxvnlLx53LTUsg zMzirwHFJH3ICLT+TCpKCgdh4vFxcvnlclFn6WyFsThY19rcpNBjibqjG14TWfVJ cfY+TyyFM/8Y72gDuDAS/MDTYHXUH1keuykofjJTNdDN+/PjaID0fyDpgkcknAA/ rfb1vmtcl4h9zf3s6/Ld/vv4dWCAr3UAqVSV7SpXLcTmoTFu5FL3VBd1BIBuxzt3 pfVU+Aj5kI86KTdzbdiBf+LCrUNu149SGEMUquQPqmhS2tD1NX2riw+NXSZzKJnr eRwbgpZAEGwQw1bVs5bgIRwTiKVJqNEftqLkiIMZBR9KPheOApwyMo7HX32Dd6py KPByMrZuOEA1NwPWVHwOSvb2n1vn3/cwWq2XV0Km0G4a5fbfDshKe2I0NZctHIZL KZhmYD97LmayV55nFpFMQ/6vbn08Z0/1s3yWxEYLzHDmI2WutAZowOCnIFuAla0V p4xwQgABC43nBQPaeswsH0Z6VPMzciqjqCX8Gygx7Tn2BhR+AOMZ+rgq/A97fTkc E2c/ivzqqA9RBocdgXmwcxIeCx+cMCi9386H8N+MX58wxxnhWUaZ51WUnuqzUFbD 4dXdq9AfTjaw8XyHrxHTc0jiBtCUgvErD2TESJIg5BhCeczM4vgHwMSo4G7A57x0 KcdssMqY+AMGb1uQut8/ =80t0 -----END PGP SIGNATURE-----
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