Date: Thu, 30 Aug 2001 06:50:01 -0700 (PDT) From: Bruce Evans <bde@zeta.org.au> To: freebsd-bugs@FreeBSD.org Subject: Re: i386/19245: -fexpensive-optimizations buggy (even with -O) Message-ID: <200108301350.f7UDo1T33866@freefall.freebsd.org>
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The following reply was made to PR i386/19245; it has been noted by GNATS. From: Bruce Evans <bde@zeta.org.au> To: Mikhail Teterin <mi@aldan.algebra.com> Cc: <mike@FreeBSD.org>, <bde@FreeBSD.org>, <freebsd-gnats-submit@FreeBSD.org> Subject: Re: i386/19245: -fexpensive-optimizations buggy (even with -O) Date: Thu, 30 Aug 2001 23:45:16 +1000 (EST) On Wed, 29 Aug 2001, Mikhail Teterin wrote: > > The main reason reason is that I wasn't sure that it was not a FreeBSD > > bug. There is now a near-duplicate of this PR (gnu/30181) which says > > that the bug is in both the FreeBSD port and original GNU version > > of gcc-2.95.3, and analyses generated code to locate the wrong > > instructions. It's clear that it is a gcc bug. > > But on the Mandrake the same code compiles correctly -- that's what I > don't understand. In fact, that's the only reason I filed the PR at all > -- I know about optimization problems in gcc in general. > > Did Mandrake patch the compiler somehow? Can we incorporate their fix? Maybe they just use obrien's hack to silently force -O2 down to -O1 :-). (WANT_FORCE_OPTIMIZATION_DOWNGRADE=1 in /etc/make.conf in -current.) Bruce To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
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