[PATCH] Fix PR42509, wrong-code from the RTL alias oracle

[Richard Earnshaw]

On Fri, 2010-04-02 at 19:06 +0200, Richard Guenther wrote:

> Bootstrapped and tested on x86_64-unknown-linux-gnu, Richard
> is bootstrapping on arm-linux-gnueabi.  I'll commit this
> to trunk once he confirms that the issue is fixed by this
> patch.
> 
> Thanks,
> Richard.
> 
> 2010-04-02  Richard Guenther  <rguenther@suse.de>
> 
> 	PR middle-end/42509
> 	* alias.c (nonoverlapping_memrefs_p): For spill-slot accesses
> 	require a non-NULL MEM_OFFSET.

Bootstrap now successful.

Full tests will probably take at least another 12 hours, but I'm pretty
sure this is fixed now.

R.