[patch] alias.c: Replace "return NULL_RTX" with "return 0".

[Alexandre Oliva]

On Jun 12, 2003, Zack Weinberg <zack@codesourcery.com> wrote:

>> A system that defines NULL to 0 where that is a different size from
>> (void*)0 is broken.  Does such brokenness actually exist?

> Dunno, but that's still not good enough - consider an ABI where
> pointers go in different registers from integers when passing
> arguments.

I guess this means we must keep on using NULL_RTX, at least for
passing NULL rtx arguments through varargs...  How about other uses?

-- 
Alexandre Oliva   Enjoy Guarana', see http://www.ic.unicamp.br/~oliva/
Red Hat GCC Developer                 aoliva@{redhat.com, gcc.gnu.org}
CS PhD student at IC-Unicamp        oliva@{lsd.ic.unicamp.br, gnu.org}
Free Software Evangelist                Professional serial bug killer