[Bug tree-optimization/22488] [4.1 Regression] push_fields_onto_fieldstack calculates offset incorrectly

["mark at codesourcery dot com" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #43 from mark at codesourcery dot com  2005-10-04 21:14 -------
Subject: Re:  [4.1 Regression] push_fields_onto_fieldstack
 calculates offset incorrectly

jason at redhat dot com wrote:

> I was suggesting that instead of making the complete type and base type 
> essentially copies of one another, that we make the complete type a 
> wrapper around the base type.  Proper alias semantics would fall out of 
> that.

That's a nice idea.  It would make life a little more complicated for
the front end; when seeing "a.b", you have to generate a double
COMPONENT_REF, because the internal representation is a.as_base.b.  But,
that's a relatively localized change.  We could actually do that at
gimplification/genericization-time too, I guess, which would be a nice
start towards proper lowering.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22488