Re: Thou shalt have no other gods before the ANSI C standard

From: Tom Linden (tom_at_kednos.com)
Date: 02/28/05 

Date: Sun, 27 Feb 2005 17:49:27 -0800

On Sun, 27 Feb 2005 20:22:15 -0500, Douglas A. Gwyn <DAGwyn@null.net>
wrote:

> Tom Linden wrote:
>> Is this better
>
> No, because PL/I "do" has simpler rules from C "for",
> so that it is literally impossible for it to evaluate
> a general conditional expression on each iteration.
> It's not a matter of performing optimization, but of
> merely implementing the more restrictive rules.

In that assertion you are mistaken, the DO statement is actually
far more complex in PL/I, allowing compound clauses.
>
> You won't be able to address the question about what
> optimizations C compilers perform by exhibiting PL/I
> examples.

Doesn't matter whether it is PL/I or C, we were discussing, I
thought, code hoisting in one case strlen and in the other length. 

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