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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	[thread overview]
Message-ID: <bug-110406-4-6FZHoxRy7X@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-110406-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110406

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 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 them
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).

  parent reply	other threads:[~2023-06-27  8:52 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-06-26  2:25 [Bug d/110406] New: " ibuclaw at gcc dot gnu.org
2023-06-26  2:33 ` [Bug d/110406] " pinskia at gcc dot gnu.org
2023-06-26  2:44 ` [Bug target/110406] " pinskia at gcc dot gnu.org
2023-06-26  3:06 ` ibuclaw at gcc dot gnu.org
2023-06-26  3:10 ` ibuclaw at gcc dot gnu.org
2023-06-26  4:21 ` pinskia at gcc dot gnu.org
2023-06-26  4:28 ` pinskia at gcc dot gnu.org
2023-06-26  4:32 ` pinskia at gcc dot gnu.org
2023-06-26  9:37 ` ibuclaw at gcc dot gnu.org
2023-06-26  9:38 ` ibuclaw at gcc dot gnu.org
2023-06-26 20:55 ` ibuclaw at gcc dot gnu.org
2023-06-27  8:52 ` iains at gcc dot gnu.org [this message]
2023-06-27  9:27 ` iains at gcc dot gnu.org
2023-06-28 16:33 ` ibuclaw at gcc dot gnu.org
2023-06-28 18:19 ` cvs-commit at gcc dot gnu.org
2023-06-28 18:52 ` cvs-commit at gcc dot gnu.org
2023-06-28 18:55 ` ibuclaw at gcc dot gnu.org

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