[cxx-abi-dev] trivial __dynamic_cast fails?

[Mark Mitchell]

David Baraff wrote:

> I'm playing around with the __cxxabiv1::__dynamic_cast() function.  It
> works as I would expect, with one exception.

The ABI document does not require that __dynamic_cast perform a 
derived-to-base cast.  Those __dynamic_cast operations that can actually 
be performed statically by the compiler must be performed statically by 
the compiler -- the runtime library does not expect to be called in that 
situation.

-- 
Mark Mitchell
CodeSourcery, LLC
mark at codesourcery.com