From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id CFE28386F444; Fri, 5 Mar 2021 12:08:59 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org CFE28386F444 From: "unlvsur at live dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/99396] std::rotl and std::rotr Does not convert into ROTATE on the gimple level Date: Fri, 05 Mar 2021 12:08:59 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: tree-optimization X-Bugzilla-Version: 11.0 X-Bugzilla-Keywords: missed-optimization X-Bugzilla-Severity: enhancement X-Bugzilla-Who: unlvsur at live dot com X-Bugzilla-Status: ASSIGNED X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: jakub at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: gcc-bugs@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-bugs mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 05 Mar 2021 12:08:59 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99396 --- Comment #16 from cqwrteur --- (In reply to Jakub Jelinek from comment #15) > Could be if _GLIBCXX17_CONSTEXPR (...) > sure. bit header is a new C++20 header. There is no reason the compiler does not support if constexpr. If you compile it with pre-C++20, the code should even get compiled=