Date: Sun, 9 Feb 2003 22:10:06 +0800 From: Adrian Chadd <adrian@freebsd.org> To: David Schultz <dschultz@uclink.berkeley.edu> Cc: Terry Lambert <tlambert2@mindspring.com>, Ray Kohler <ataraxia@cox.net>, freebsd-current@FreeBSD.ORG Subject: Re: Compiling with high optimization? Message-ID: <20030209141006.GB33928@skywalker.creative.net.au> In-Reply-To: <20030209002542.GA20812@HAL9000.homeunix.com> References: <20030208173756.GA56030@arkadia.nv.cox.net> <20030208232724.GA20435@HAL9000.homeunix.com> <3E459BF3.BB3FC381@mindspring.com> <20030209002542.GA20812@HAL9000.homeunix.com>
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On Sat, Feb 08, 2003, David Schultz wrote: > Yes, the possibility of being bitten by compiler bugs is certainly > higher with higher optimization levels. Alpha with -O2 seems to > have been broken for years, and I have seen strange things happen > on IA64 as well. But the i386 code generators have received much > wider testing and debugging, so there is somewhat less danger there. Yet squid under i386 freebsd is .. well, finds -O bugs in gcc. We gave up trying -O under FreeBSD a long time ago. :-) (note: I've seen better performance gains by telling gcc exactly what CPU you have over -O65536 ..) Adrian -- Adrian Chadd <angryskul> learning is bad <adrian@FreeBSD.org> <angryskul> it just makes the people around you dumber (angryskul == alfred@irc) <angryskul> :( To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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