Date: Sun, 27 May 2007 01:42:12 +0400 From: "Yuriy Tsibizov" <Yuriy.Tsibizov@gfk.ru> To: <Yuriy.Tsibizov@gfk.ru>, <kabaev@gmail.com> Cc: current@freebsd.org Subject: Re: [Regression] snd_emu10k1 doesn't work after GCC 4.2 upgrade Message-ID: <009501c79fdf$19e25880$1e00000a@hhp.local>
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See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D32100 -----Original Message----- From: "Yuriy Tsibizov"<Yuriy.Tsibizov@gfk.ru> Sent: 27.05.07 00:33:05 To: "kabaev@gmail.com"<kabaev@gmail.com>, = "Yuriy.Tsibizov@gfk.ru"<Yuriy.Tsibizov@gfk.ru> Cc: "current@freebsd.org"<current@freebsd.org> Subject: Re: [Regression] snd_emu10k1 doesn't work after GCC 4.2 upgrade Alexander, I've narrowed it down to single function -- emu_vsetup (in = sys/dev/sound/pci/emu10k1.c). Without -ftree-vrp it compiles without = problems, with it it makes broken code. You can also compare it to the = function with the same name in emu10kx.c -- in last file it compiles = with or without -ftree-vrp without problems. If you need more info, I can do more research tomorrow. Yuriy. P.S. Many thanks to ssb from #c on RusNet. -----Original Message----- From: "Alexander Kabaev"<kabaev@gmail.com> Sent: 26.05.07 23:48:33 To: "Yuriy Tsibizov"<Yuriy.Tsibizov@gfk.ru> Cc: "Yuriy.Tsibizov@gfk.ru"<Yuriy.Tsibizov@gfk.ru>, = "ed@fxq.nl"<ed@fxq.nl>, "current@freebsd.org"<current@freebsd.org>, = "freebsd@unixfreunde.de"<freebsd@unixfreunde.de> Subject: Re: [Regression] snd_emu10k1 doesn't work after GCC 4.2 upgrade On Sat, 26 May 2007 23:38:58 +0400 "Yuriy Tsibizov" <Yuriy.Tsibizov@gfk.ru> wrote: > Alexander, I'm working on it. > The only thing I can say right now, that it's -ftree-vrp that broke > the code -- building with -O -ftree-vrp makes broken binary, while -O > alone does not.=20 >=20 > (sorry for top-posting) Thanks. Ideally should be able to distill the case info a simple preprocessed .i file with just enough code to demonstrate the mis-compilation. I do not have any of the snd_emuXXX cards here myself. --=20 Alexander Kabaev
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