Path: utzoo!attcan!uunet!husc6!bloom-beacon!mcgill-vision!mouse
From: mouse@mcgill-vision.UUCP (der Mouse)
Newsgroups: comp.unix.wizards
Subject: Re: alloca (was back to the (ivory) tower)
Message-ID: <1169@mcgill-vision.UUCP>
Date: 17 Jun 88 18:16:28 GMT
References: <16100@brl-adm.ARPA>
Organization: McGill University, Montreal
Lines: 18

In article <16100@brl-adm.ARPA>, rbj@icst-cmr.arpa (Root Boy Jim) writes:
[Other attributions are Neil Webber <nw@palladium.uucp> and
ted%nmsu.csnet@relay.cs.net, but it's not clear who wrote what.]
> 	   2) function calling conventions -- unless alloca() is
> 	      built into the C compiler it has to implemented as
> 	      a C callable function, not an inline stack adjustment.
> It's hard to figure out exactly what you mean here.

I would imagine that he means more or less what he said.  If alloca()
is not specially known to the compiler (ie, "built in"), it will
compile into a call to a function.  It therefore can't be an inline
stack adjustment.  That's all.  (The function called will wind up
adjusting the stack, yes, but that's not "inline".)

					der Mouse

			uucp: mouse@mcgill-vision.uucp
			arpa: mouse@larry.mcrcim.mcgill.edu