merge_pointed_to_info

[Andrew Pinski]

On Nov 3, 2004, at 4:07 PM, Diego Novillo wrote:

> On Wed, 2004-11-03 at 04:33, Nathan Sidwell wrote:
>
>>    dest_pi = get_ptr_info (dest);
>>    orig_pi = SSA_NAME_PTR_INFO (orig);
>>
>> At this point is it an error for dest_pi == orig_pi ? The later code
>> looks like it will break if they are.
>>
> Yes, and it should only happen if dest == orig.  Is that the case?
>
>> However, the attached file contains such an instance, when compiled 
>> for
>> i686-pc-linux-gnu at -O2.  My suspicion was aroused when 
>> bitmap_ior_into
>> was called with the same bitmap.
>>
> Do we ICE or generate bad code?  I'll take a look.

Hmm, this looks related to PR 18291.

Thanks,
Andrew Pinski