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From: "Bob W" <dontsend AT operamail DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Sequence points, any?
Date: 7 Apr 2006 02:46:07 -0700
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Reply-To: djgpp AT delorie DOT com

Brian Inglis wrote:
>
> The compiler should support the timing of non-trivial functions even
> (or especially) in optimized code.
>


Besides being highly recursive Ack() is trivial:
No access to externals, globals, etc. It even
would not exist as a function in compiled code
if it was not recursive.

If I make it less trivial (e.g. by inserting an
external function such as putchar), gcc changes its
behaviour. At least that is what I think to remember
while testing various program versions.