RFA (fold): PATCH for c++/49290 (folding *(T*)(ar+10))

Michael Matz matz@suse.de
Tue Jun 7 13:46:00 GMT 2011


On Tue, 7 Jun 2011, Richard Guenther wrote:

> > > fold_convert_loc it to the expected type, while the middle-end has 
> > > the notion of useless type conversions, fold-const.c is also used by 
> > > FEs and I think it is expected to have the types exactly matching. 
> > > So (T)s1[10] instead of s1[10] in this case.
> > 
> > I'm not sure that's a good idea if the caller wants an lvalue.
> Rather build the array-ref with type T directly (thus, with a mismatch 
> between the type of the array-ref and the element type).

Ick.  Sooner or later such inconsistency will bite us.  It always does.


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