Date: Fri, 15 Nov 2002 16:36:54 +0900 From: TOMITA Yoshinori <yoshint@flab.fujitsu.co.jp> To: David Schultz <dschultz@uclink.Berkeley.EDU> Cc: Thomas David Rivers <rivers@dignus.com>, FreeBSD-current@FreeBSD.ORG Subject: Re: gcc 3.2.1 optimization bug ? Message-ID: <ywld6p7l1wp.fsf@cerberus.proc.flab.fujitsu.co.jp> In-Reply-To: <20021115013750.GA12079@HAL9000.homeunix.com> (David Schultz's message of "Thu, 14 Nov 2002 17:37:50 -0800") References: <ywlvg34jn21.fsf@cerberus.proc.flab.fujitsu.co.jp> <200211111355.gABDt2g55397@lakes.dignus.com> <ywlfzu8i44g.fsf@cerberus.proc.flab.fujitsu.co.jp> <20021115013750.GA12079@HAL9000.homeunix.com>
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>> On Thu, 14 Nov 2002 17:37:50 -0800, David Schultz
>> <dschultz@uclink.Berkeley.EDU> said:
Da> You can work around the problem by disabling -fschedule-insns or
Da> -fstrict-aliasing, both of which are turned on by -O2. The latter
Da> option is the more direct cause of your problem, but for some
Da> reason only the combination of the two seems to generate incorrect
Da> output on i386.
Before posting that question here, one of my colleague advised me that
it may have something to do with "aliasing" feature. I looked up the
option "-fstrict-aliasing" in gcc.info and tried:
gcc -O2 -fstrict-aliasing ...
ha-ha... I should have read the info more carefully.
-fno-strict-alias also worked for it. Thanks.
--
TOMITA Yoshinori
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