linux-kernel - Re: gcc 4.5.1 / as 2.20.51.0.11 miscompiling drivers/char/i8k.c ?

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Message-ID: <20101108115353.GC2583@sunsite.ms.mff.cuni.cz>
Date:	Mon, 8 Nov 2010 12:53:53 +0100
From:	Jakub Jelinek <jakub@...hat.com>
To:	Paul Koning <paul_koning@...l.com>
Cc:	Richard Guenther <richard.guenther@...il.com>,
	Andi Kleen <andi@...stfloor.org>,
	Andreas Schwab <schwab@...ux-m68k.org>, Jim <jim876@...all.nl>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	gcc@....gnu.org
Subject: Re: gcc 4.5.1 / as 2.20.51.0.11 miscompiling drivers/char/i8k.c ?

On Mon, Nov 08, 2010 at 06:47:59AM -0500, Paul Koning wrote:
> I don't know about 4.5, but I noticed that with 4.6 (trunk), testcasese
> like gcc.c-torture/compile/20000804-1.c optimize away the asm and all the
> operand generation except for -O0.

That's fine, the asm isn't volatile and the output is not used.

	Jakub
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