[Bug c++/45221] missed optimization with multiple bases and casting

[navin dot kumar at gmail dot com]

------- Comment #10 from navin dot kumar at gmail dot com  2010-08-07 17:27 -------
Richard, correct references in C++ cannot bind to NULL.  So gcc should derive
non-NULL-ness when the argument is a reference.  It seems to correctly do this
in the case of foo3 and fooB, but fails to do so for foo1 and fooA.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45221