From: "Patrick Mitran" <pmitran AT tsp DOT ece DOT mcgill DOT ca>
Newsgroups: comp.os.msdos.djgpp
References: <2rVK6.20535$z01 DOT 3117219 AT carnaval DOT risq DOT qc DOT ca> <7458-Sat12May2001083424+0300-eliz AT is DOT elta DOT co DOT il>
Subject: Re: -O6 optimizations
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Message-ID: <hOSL6.22921$z01.3439658@carnaval.risq.qc.ca>
Date: Mon, 14 May 2001 15:26:05 GMT
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

> >
> > I'm using gcc 2.95.3. I was wondering where I could get a list of all
the
> > optimizations that are turned on by -O6.
>
> "-O6" is the same as "-O3".  The GCC manual explains what
> optimizations are turned on by each -On option.  I agree that this
> section in the GCC docs needs work, but that's the best you can
> currently have without looking at the sources (which you should do if
> you really want all the gory details).
>
> "-O6" only does some real work in the PGCC variant of the compiler,
> which is not what you have (and which is not on the main branch of the
> GCC development anyway).
>

Really? This would seem to contradict the FAQ which explicitly states that
GCC 2.95 and above does some extra work with -O6. (section 14.2) Or am
I reading it wrong?

P.