[Bug c++/67650] undef reference with -fdevirtualize

[zlynx at acm dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67650

Jonathan Briggs <zlynx at acm dot org> changed:

           What    |Removed                     |Added
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                 CC|                            |zlynx at acm dot org

--- Comment #12 from Jonathan Briggs <zlynx at acm dot org> ---
This looks incredibly similar to a bug I found this week compiling my code with
GCC 6.0. 

My code was much more complex, which has made it really difficult to write a
small reproducer, but I also have a virtual function that is overriding an
abstract base class. The implementation function is defined inline and is part
of a template class. In code compiled with O2 or O3 the function call and all
following code simply disappears from the assembly.