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From: shekita@crystal.UUCP
Newsgroups: net.lang.c
Subject: register variables
Message-ID: <472@crystal.UUCP>
Date: Thu, 20-Jun-85 14:33:52 EDT
Article-I.D.: crystal.472
Posted: Thu Jun 20 14:33:52 1985
Date-Received: Sun, 23-Jun-85 00:40:45 EDT
Distribution: net
Organization: U of Wisconsin CS Dept
Lines: 14

I have some questions about register variables:

1) When is it appropriate to declare a variable as a
   register? I have been told that declaring a variable 
   as a register can actually result in slower code. Is
   there a rule of thumb dictating when and when not to
   declare a variable as a register?

2) How many variables can be declared as registers on a Vax 780?
   In general, is there some way to tell how many register variables
   can be declared?

								 Eugene Shekita
								 Univ of Wisconsin