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From: bright@dataio.UUCP (Emperor)
Newsgroups: net.lang.c
Subject: Re: ANSII C, optimization, and "hardware registers"
Message-ID: <201@dataio.UUCP>
Date: Mon, 15-Oct-84 13:45:18 EDT
Article-I.D.: dataio.201
Posted: Mon Oct 15 13:45:18 1984
Date-Received: Wed, 17-Oct-84 06:47:28 EDT
References: <1538@wateng.UUCP>
Organization: Data I/O, Redmond, WA
Lines: 9

If you are using an optimizing compiler, and your code deals with
hardware registers and such, it is usually a good idea to turn off
all optimizations. Nearly all optimizing transformations applied
to a program will cause certain kinds of programs that deal with
hardware to fail. Since, however, 99% of code written does not
deal directly with hardware, and a good optimizer can double the
speed of the resulting code, the optimizer is worth keeping around.
				Walter Bright