Add memory clobber for i486 string inlines

[Jakub Jelinek]

On Wed, Mar 13, 2002 at 10:57:08AM +0100, Andreas Jaeger wrote:
> Richard Henderson <rth@redhat.com> writes:
> 
> > On Tue, Mar 12, 2002 at 08:38:51PM +0100, Andreas Jaeger wrote:
> >> As Richard Henderson mentioned on the gcc list (see:
> >> http://gcc.gnu.org/ml/gcc-patches/2002-03/msg00534.html), we need to
> >> add a memory clobber even for reading memory.
> >
> > Err, no, I said you should describe the read from memory.
> > For memcmp you have the length of the access; for the others
> > you can just use an array size of 0xffffffff or something.
> 
> A length of 0xffffffff does not work, it gives:
> str.c:56: size of array `__x' is too large
> I used one f less.
> 
> But the following two examples compile.  Are these ok?

Don't you need __extension__ there too?
Also, I think at least memcpy/memset should go for recent gcc, gcc
does a better job.

	Jakub