Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!seismo!rutgers!sri-unix!hplabs!pesnta!amd!amdcad!decwrl!decvax!mcnc!rti-sel!rcb
From: rcb@rti-sel.UUCP (Random)
Newsgroups: comp.lang.misc
Subject: Re: better ratfor ?
Message-ID: <1086@rti-sel.UUCP>
Date: Thu, 20-Nov-86 09:01:07 EST
Article-I.D.: rti-sel.1086
Posted: Thu Nov 20 09:01:07 1986
Date-Received: Fri, 21-Nov-86 20:29:00 EST
References: <1707@ncoast.UUCP>
Reply-To: rcb@rti-sel.UUCP (Random)
Distribution: comp.org.decus
Organization: Research Triangle Institute, NC
Lines: 13
Keywords: ratfor, fortran, optimize

At a place I used to work, we had some ratfor programs. A guy there modified
the RatFor preprocessor (compiler) to detect the special case loop of

	for (i=x; i<y; i=i+z) 

This was converted in a VMS FORTRAN do loop instead of if's and goto's. This
allowed the fortran compiler to detect that a loop was present and kick
in loop optimizing code. I don't remember the numbers, but the improvement
was significant.
-- 
					Random (Randy Buckland)
					Research Triangle Institute
					...!mcnc!rti-sel!rcb