OpenEuphoria

RE: Empty procedure optimized out?

• Posted by "Ricardo M. Forno" <rmforno at tutopia.com> Nov 21, 2004
• 486 views

----- Original Message -----
From: Robert Craig <guest at RapidEuphoria.com>
To: <EUforum at topica.com>
Sent: Friday, November 19, 2004 6:58 PM
Subject: Re: Empty procedure optimized out?


>
>
> posted by: Robert Craig <rds at RapidEuphoria.com>
>
> Tommy Carlier wrote:
> >
> > Robert, couldn't you remove calls to empty procedures while parsing
> > a program? I have a procedure to ignore the return value of a function,
> > that looks like this:
> > }}}
<eucode>
> > global procedure ignore(object ignored)
> > -- ignores its parameter
> > end procedure
> > </eucode>
{{{

> > And it's used like this:
> > }}}
<eucode>
> > ignore(someFunction(someParameter1, someParameter2))
> > </eucode>
{{{

> > The function 'someFunction' should be executed, but the call to the
> > empty procedure could be removed. That could also optimize this
> > situation:
> > }}}
<eucode>
> > constant DEBUG = 0
> >
> > procedure writeToLog(sequence line)
> > if DEBUG then
> > puts(logfile, line & '\n')
> > end if
> > end procedure
> > </eucode>
{{{

> >
> > 'if DEBUG then' can be removed, because you know before running the
> > code than it will never be called. That makes the 'writeToLog'-procedure
> > an empty procedure that can be optimized out.
>
> Thanks. I'll add it to my list of possible optimizations.
>
> By the way, this was too trivial for the release notes,
> but I took out the warning about parameters declared but not used.
>
I feel that these warnings were useful... What a pity you took them out.
> Regards,
>    Rob Craig
>    Rapid Deployment Software


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