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From: "Yuriy Tsibizov" <Yuriy.Tsibizov@gfk.ru>
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Date: Sun, 27 May 2007 00:30:20 +0400
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Thread-Topic: [Regression] snd_emu10k1 doesn't work after GCC 4.2 upgrade
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Subject: Re: [Regression] snd_emu10k1 doesn't work after GCC 4.2 upgrade
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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