Path: utzoo!attcan!uunet!mcvax!cernvax!hjm
From: hjm@cernvax.UUCP (Hubert Matthews)
Newsgroups: comp.lang.c
Subject: Re: Short code to determine compiler's
Message-ID: <1038@cernvax.UUCP>
Date: 22 Jul 89 10:21:38 GMT
References: <396@uop.uop.EDU> <225800197@uxe.cso.uiuc.edu> <579@targon.UUCP> <171@bms-at.UUCP> <14497@dartvax.Dartmouth.EDU>
Reply-To: hjm@cernvax.UUCP (Hubert Matthews)
Organization: CERN European Laboratory for Particle Physics, CH-1211 Geneva, Switzerland
Lines: 15


I have a question for the authors of smart C compilers: is the
register declaration useful at all for such compilers?  It indicates
that a variable is non-volatile, noalias and that taking its address
is illegal, all of which should make things easier for the optimiser.

So, does "register" help or hinder?  Has it become a source-code
"no-op"?  Can I merrily leave it out of my programs and let the
compiler do the guessing for me :-).

(Please, no wars, just *informed* replies, preferably from the authors
of said compilers...)-- 
Hubert Matthews      ...helping make the world a quote-free zone...

hjm@cernvax.cern.ch   hjm@vxomeg.decnet.cern.ch    ...!mcvax!cernvax!hjm