X-Authentication-Warning:	delorie.com: mail set sender to djgpp-bounces using -f
From:	"Bob W" <dontsend AT operamail DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Sequence points, any?
Date:	5 Apr 2006 17:40:45 -0700
Organization:	http://groups.google.com
Lines:	25
Message-ID:	<1144284045.083854.45700@i39g2000cwa.googlegroups.com>
References:	<1144238453 DOT 674596 DOT 302360 AT z34g2000cwc DOT googlegroups DOT com>
	<49i0u7Foq6jlU1 AT news DOT dfncis DOT de>
NNTP-Posting-Host:	84.102.38.22
Mime-Version:	1.0
X-Trace:	posting.google.com 1144284050 17147 127.0.0.1 (6 Apr 2006 00:40:50 GMT)
X-Complaints-To:	groups-abuse AT google DOT com
NNTP-Posting-Date:	Thu, 6 Apr 2006 00:40:50 +0000 (UTC)
User-Agent:	G2/0.2
X-HTTP-UserAgent:	Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727),gzip(gfe),gzip(gfe)
Complaints-To:	groups-abuse AT google DOT com
Injection-Info:	i39g2000cwa.googlegroups.com; posting-host=84.102.38.22;
	posting-account=CXf2IQ0AAADhHwR4LIBYSPHMQKV3cPd3
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp
Reply-To:	djgpp AT delorie DOT com

Thank you very much for your post. That was
pretty good analysis, which was also good
enough to remove my remaining doubts about
the new way gcc is handling the kind of code
mentioned in this thread.


> > If gcc's out-of-sequence optimisation is prevented
> > by using one of the methods mentioned previously,
> > the program actually executes a touch faster.
>
> ... on the CPU you tried it on.  Which may not be the one it was
> optimizing for.

I presume that you are not referring to specific
submodel targets here (e.g. P3, P4, etc.). You
probably have meant to tell me that gcc's general
compile method gets tuned torwards hyperthreading
capable targets - and gcc sticks to its new way of
handling things regardless whether a "vintage target"
like the P3 is specified in the command line option
or not.

Did I get this right?

- Raw text -