From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 2181) id 55BE23860C33; Mon, 9 Nov 2020 14:54:33 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 55BE23860C33 Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit From: Jonathan Wakely To: gcc-cvs@gcc.gnu.org, libstdc++-cvs@gcc.gnu.org Subject: [gcc r11-4843] libstdc++: Remove redundant check for zero in std::__popcount X-Act-Checkin: gcc X-Git-Author: Jonathan Wakely X-Git-Refname: refs/heads/master X-Git-Oldrev: 96f315213f337c2d5a9268f2d3e8337bbdb71bfc X-Git-Newrev: ff4bfb1553cf525d7299bbf7451ac32cfd97ae1b Message-Id: <20201109145433.55BE23860C33@sourceware.org> Date: Mon, 9 Nov 2020 14:54:33 +0000 (GMT) X-BeenThere: libstdc++-cvs@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libstdc++-cvs mailing list List-Unsubscribe: , List-Archive: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 09 Nov 2020 14:54:33 -0000 https://gcc.gnu.org/g:ff4bfb1553cf525d7299bbf7451ac32cfd97ae1b commit r11-4843-gff4bfb1553cf525d7299bbf7451ac32cfd97ae1b Author: Jonathan Wakely Date: Mon Nov 9 14:31:13 2020 +0000 libstdc++: Remove redundant check for zero in std::__popcount The popcount built-ins work fine for zero, so there's no need to check for it. libstdc++-v3/ChangeLog: * include/std/bit (__popcount): Remove redundant check for zero. Diff: --- libstdc++-v3/include/std/bit | 3 --- 1 file changed, 3 deletions(-) diff --git a/libstdc++-v3/include/std/bit b/libstdc++-v3/include/std/bit index f4344820d52..16f7eba46d7 100644 --- a/libstdc++-v3/include/std/bit +++ b/libstdc++-v3/include/std/bit @@ -184,9 +184,6 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION using __gnu_cxx::__int_traits; constexpr auto _Nd = __int_traits<_Tp>::__digits; - if (__x == 0) - return 0; - constexpr auto _Nd_ull = __int_traits::__digits; constexpr auto _Nd_ul = __int_traits::__digits; constexpr auto _Nd_u = __int_traits::__digits;