fold_builtin_memcpy cannot optimize <retval>?

[Mark Mitchell]

Andrew Pinski wrote:
> 
> On Jan 21, 2005, at 2:37 PM, Mark Mitchell wrote:
> 
>> I'm not sure.  I seemed to believe in that thread that they could 
>> never be NULL, but I'm not sure if everyone agreed, and I see that we 
>> suggested a non-NULL tag on objects somewhere.  So, in that case, 
>> there may be no difference at all to the middle-end.  In any case, I 
>> think that it would make sense for us to allow a REFERENCE_TYPE 
>> anywhere we allow a POINTER_TYPE.
> 
> 
> 
> Isn't this valid C++ then (or is it just undefined):

It's undefined.  You dereferenced a NULL pointer.

-- 
Mark Mitchell
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