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From: Tucker Taft <stt@averstar.com>
Subject: Re: Matrix Multiplication
Date: 1999/12/15
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Date: 1999-12-15T00:00:00+00:00
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Gautier wrote:
> 
> > Hmmm. I think that's my cue to point out that ObjectAda has no loop
> > optimization options whatsoever. :-)
> 
> Is there optimization at all in OA ?

I certainly presume so, since our front end generates
information specifically for the ObjectAda optimizer.
Try something like "-O3" or "-opt".  Usually if you
run the compiler with no arguments it will dump out
a list of available switches.

One possibility is that the optimizer is only in some of their
targets.  Historically, the x86 back end has been pretty different
from the other "risc-ish" backends.  I have some memory that their
x86 backend did not do as many register optimizations as the
risc-ish backends (which is not terribly surprising given the
rather un-general register set on the x86 -- note: not trying to
start a CISC vs. RISC war here ;-).

> I didn't find the switches for that...
> Maybe a hidden panel in the interface - a bit like...
>   http://lsewww.epfl.ch/wiesmann/jokes/errors/word.gif
> (just a bit)
> 
> --
> Gautier

-- 
-Tucker Taft   stt@averstar.com   http://www.averstar.com/~stt/
Technical Director, Distributed IT Solutions  (www.averstar.com/tools)
AverStar (formerly Intermetrics, Inc.)   Burlington, MA  USA