Re: Testing m68k changes on AmigaOS and Linux/m68k

[Bernardo Innocenti <bernie at develer dot com>]

Gunther Nikl wrote:

> > With the varargs form, the compiler will push all arguments on the
> > stack before calling foo(), effectively wasting the same amount of
> > stack space of the local array.
>
>   The array is allocated at _frame generation_. Now imagine using a lot
>   of such calls where every array is only used _one_ time. The varargs
>   form uses the stackspace only temorary when making the call and cleans
>   up soon after the call returns.

I should have guessed GCC would handle it like that. However, since
the scope of the array is within a nested block, a smarter compiler
might do the right thing. That's another missing optimization.

And, btw, SAS/C did it right ;-)

--
 // Bernardo Innocenti - Develer S.r.l., R&D dept.
\X/  http://www.develer.com/

Please don't send Word attachments - http://www.gnu.org/philosophy/no-word-attachments.html