Path: utzoo!mnetor!uunet!husc6!cmcl2!brl-adm!brl-smoke!gwyn
From: gwyn@brl-smoke.ARPA (Doug Gwyn )
Newsgroups: comp.lang.c
Subject: Re: noalias and vectors
Message-ID: <7164@brl-smoke.ARPA>
Date: 22 Jan 88 20:52:49 GMT
References: <2942@hall.cray.com> <531@cresswell.quintus.UUCP> <7088@brl-smoke.ARPA> <3419@ihlpf.ATT.COM> <7142@brl-smoke.ARPA> <3458@ihlpf.ATT.COM>
Reply-To: gwyn@brl.arpa (Doug Gwyn (VLD/VMB) <gwyn>)
Organization: Ballistic Research Lab (BRL), APG, MD.
Lines: 13
Keywords: noalias, auto-vectorizing

In article <3458@ihlpf.ATT.COM> nevin1@ihlpf.UUCP (00704A-Liber,N.) writes:
>Are you telling me that noaliasing a pointer to char means that I cannot have
>overlap anywhere past the character that I am pointing to?

Let's be careful here.  "noalias", like the other type qualifiers, can
appear at different levels within a complex declaration, and it applies
at the corresponding object level, not to the declaration as a whole.

A pointer to a noalias array of chars is not the same as a noalias pointer;
the latter is comparitively uninteresting.

Check the "handles" explanation I recently posted to see if it makes
things clearer.