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From: "iains at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/110406] d: Wrong code-gen returning POD structs by value
Date: Tue, 27 Jun 2023 08:52:40 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110406

Iain Sandoe <iains at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |iains at gcc dot gnu.org

--- Comment #11 from Iain Sandoe <iains at gcc dot gnu.org> ---
If I remember correctly, the underlying issue is that D always has a vtable
pointer for a "class" whereas C++ only adds one if needed (i.e. there are
actual virtual methods)

So we really need to use the 'struct' tag to D for classes without virtual
methods that need to interoperate with C++.  I think that then D will lay t=
hem
out without the vtable pointer.

We had a fix for this for Darwin - which does not seem to have made upstream
just yet.  Restesting (there's an unrelated bootstrap regression to work
around).=