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From: "sjames at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/83324] [feature request] Pragma or special syntax for
 guaranteed tail calls
Date: Mon, 25 Dec 2023 11:06:10 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D83324

Sam James <sjames at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |arsen at gcc dot gnu.org,
                   |                            |dmalcolm at gcc dot gnu.org
           See Also|                            |https://gcc.gnu.org/bugzill
                   |                            |a/show_bug.cgi?id=3D110899

--- Comment #12 from Sam James <sjames at gcc dot gnu.org> ---
(In reply to David Edelsohn from comment #11)
> GIMPLE supports must_tail, but it is not exposed at the sources level /
> attributes in GCC.
>=20
> CPython is not adding the LLVM JIT at runtime.  The proposal is to utilize
> LLVM at build time to generate code templates that can be copied into the
> CPython binary and patched with relocations.

This is now up as https://github.com/python/cpython/pull/113465 and
https://github.com/python/cpython/issues/113464.

See also PR110899 and
https://discourse.llvm.org/t/rfc-exposing-ghccc-calling-convention-as-prese=
rve-none-to-clang/74233
(which is linked from the CPython PR for adding the JIT).=