https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103490
John McCall <rjmccall at gmail dot com> changed:
What |Removed |Added
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CC| |rjmccall at gmail dot com
--- Comment #3 from John McCall <rjmccall at gmail dot com> ---
I'm not sure I agree that that's the letter of the law, but even taken that as
given, I think I would argue that it's a defect rather than something that has
to be followed. The purpose of the key-function optimization is to avoid the
overheads of having to redundantly emit and unique v-tables. A lot of uniquing
can happen at link time, of course, but not all, and optimizing load times is
important.
Does GCC ever emit actually v-tables redundantly which would otherwise be
unique under the key-function optimization? If not, it's a fixable defect.
The sample code here does not count as an observation of the difference, as
it's not at all a well-formed program under C++ rules.
