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From: ado@elsie.UUCP (Arthur David Olson)
Newsgroups: net.lang.c
Subject: Re: Register variables... :-)
Message-ID: <5178@elsie.UUCP>
Date: Tue, 23-Jul-85 16:40:40 EDT
Article-I.D.: elsie.5178
Posted: Tue Jul 23 16:40:40 1985
Date-Received: Thu, 25-Jul-85 01:33:25 EDT
References: <2943@decwrl.UUCP> <168@steinmetz.UUCP>
Organization: NIH-LEC, Bethesda, MD
Lines: 11

> His program spent much of its time calling several fairly large procedures
> isolated in a module.  These were called thousands of times and usually
> simply returned after making one simple comparison, but occasionally they
> did something complex.  This happened seldom enough so it mattered little
> whether they used register variables.  The DEC-compiled version apparently
> spent an awful lot of time just saving and restoring unchanged registers.

If only the copy-on-write register instructions had worked on early 750's. :-)
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