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Re: Fix powerpc64 g77


| > If that does happen, then it is a bug (in the compiler).
|
| Why would that be a bug?

Precily because of this:

| There should be integer-manipulation
| routines that abstract away from these representation details so that
| we do not need any kind of conditional.
Well, that's not so much a bug as a missing feature.  I think we all
agree that some abstract integer-manipulation routines would be a great
addition to GCC.  That would simplify a lot of things.

But, we can't expect David to do that today.

Actually, since the path is known at compile time to be dead, I don't
think the compiler should be issueing such diagnostic about the runtime
behaviour.
I disagree -- and I don't know of any other compilers that work as
you suggest.

The whole point of using run-time conditionals is to allow the compiler
to issue errors and warnings about pieces of code that we would otherwise
not compile -- thereby preventing build failures for people with
machines different from our own.

--
Mark Mitchell                mark@codesourcery.com
CodeSourcery, LLC            http://www.codesourcery.com


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