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[2001:8b0:bf73:93f7::51bb:e332]) by smtp.gmail.com with ESMTPSA id k14-20020adff28e000000b0033afc81fc00sm1936923wro.41.2024.02.02.05.18.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 02 Feb 2024 05:18:08 -0800 (PST) Received: from jsm28 (helo=localhost) by digraph.polyomino.org.uk with local-esmtp (Exim 4.95) (envelope-from ) id 1rVtQk-00BvyV-M7; Fri, 02 Feb 2024 13:18:06 +0000 Date: Fri, 2 Feb 2024 13:18:06 +0000 (UTC) From: Joseph Myers To: Andi Kleen cc: gcc-patches@gnu.org Subject: Re: Updated musttail patches In-Reply-To: <20240202091322.1898280-1-ak@linux.intel.com> Message-ID: <8cdcb471-a75f-3a4c-32cf-3caba0433abb@redhat.com> References: <20240202091322.1898280-1-ak@linux.intel.com> MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=US-ASCII Received-SPF: pass client-ip=170.10.129.124; envelope-from=josmyers@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9,DKIMWL_WL_HIGH=-2.276,DKIM_SIGNED=0.1,DKIM_VALID=-0.1,DKIM_VALID_AU=-0.1,DKIM_VALID_EF=-0.1,RCVD_IN_DNSWL_NONE=-0.0001,RCVD_IN_MSPIKE_H2=-0.001,SPF_HELO_NONE=0.001,SPF_PASS=-0.001,T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-Spam-Status: No, score=-5.5 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_PASS,SPF_NONE,TXREP,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: On Fri, 2 Feb 2024, Andi Kleen wrote: > This patchkit implements a [[musttail]] attribute for C/C++. > > v4: > Addressed all feedback except clang::musttail is still supported > (I don't want to force an #ifdef to most users) and I'm also still I'm fine with supporting [[clang::musttail]]. What shouldn't be supported is plain unnamespaced [[musttail]], at least for C, and I don't see any tests that that's not supported (there are tests of [[musttail]] on things that aren't returns, but that's mixing two different issues - [[gnu::musttail]] shouldn't be accepted on non-returns, while [[musttail]] shouldn't be accepted anywhere, including on returns, because it's not a standard attribute). -- Joseph S. Myers josmyers@redhat.com