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From: bright@dataio.UUCP (Walter Bright)
Newsgroups: net.lang.c
Subject: Re:  for <==> while (an exception)
Message-ID: <715@dataio.UUCP>
Date: Wed, 17-Jul-85 06:03:40 EDT
Article-I.D.: dataio.715
Posted: Wed Jul 17 06:03:40 1985
Date-Received: Sun, 21-Jul-85 02:26:01 EDT
Reply-To: bright@dataio.UUCP (Walter Bright)
Organization: Data I/O Corp., Redmond WA
Lines: 6

Some optimizing compilers generate different code for while and for loops.
The for loop makes it easy for the compiler to figure out what the
loop initialization, continuation and next expressions are. This makes
it easier to do things like loop rotation and converting loops to
do-while loops. An example of a compiler that generates better code
for for loops is the Greenhills C compiler.