Thanks. I will prepare a patch.
Bingfeng
> -Original Message-
> From: Ulrich Weigand [mailto:uweig...@de.ibm.com]
> Sent: 19 September 2011 12:56
> To: Bingfeng Mei
> Cc: gcc@gcc.gnu.org
> Subject: Re: Derive more alias information from named address space
>
Bingfeng Mei wrote:
> Therefore, A & B could only be disjoint, i.e., not aliased to each other.
> We should be able to write:
>
> if (MEM_ADDR_SPACE (mem) != MEM_ADDR_SPACE (x))
> {
> if (!targetm.addr_space.subset_p (MEM_ADDR_SPACE (mem), MEM_ADDR_SPACE
> (x))
>&& !targetm.addr_
