From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id BE70A385840F; Tue, 14 Sep 2021 18:21:19 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org BE70A385840F From: "vanyacpp at gmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/98774] gcc -O3 does not vectorize some operations Date: Tue, 14 Sep 2021 18:21:19 +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: 10.2.0 X-Bugzilla-Keywords: missed-optimization X-Bugzilla-Severity: normal X-Bugzilla-Who: vanyacpp at gmail dot com X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned 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: Tue, 14 Sep 2021 18:21:19 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98774 --- Comment #4 from Ivan Sorokin --- I retested the sample on GCC 11.2. https://godbolt.org/z/xrarP3zbY Compared to Clang 12.0.1 GCC still generates 6 more instructions in total a= nd does 6 mulpd against Clang's 4 mulpd.=