From owner-freebsd-alpha  Mon Jan 28  2:17:34 2002
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Date: Mon, 28 Jan 2002 02:17:08 -0800
From: Terry Lambert <tlambert2@mindspring.com>
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To: Idar Tollefsen <Idar.Tollefsen@baerum.kommune.no>
Cc: freebsd-alpha@freebsd.org, jhb@freebsd.org
Subject: Re: Using GCC 3 for ports?
References: <sc55311c.075@mail.baerum.kommune.no>
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Idar Tollefsen wrote:
> > Don't use gcc 3.0.x.  It will dump core on the following code:
> >
> >        switch(foo) {
> >        default:
> >                blah();
> >                break;
> >        }
> 
> Why is this kind of constructs used instead of a simple "if" statement?
> I remember at one point, there were rumors that a switch clause was
> faster than an "if" statement, but I tought that argument was gone with
> modern compilers who were able to optimize both just as well...?

Because:

	switch(foo) {
#ifdef NOT_ON_BY_DEFAULT_1
	case 75:
		fum();
		break;
#endif
#ifdef NOT_ON_BY_DEFAULT_2
	case 106:
		fee();
		break;
#endif
	default:
		blah();
		break;
	}

Is a cleaner way to do it.

Counter question: why won't the GCC compiler compile C code?

8-)

-- Terry

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