From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id B24A93858435; Tue, 5 Oct 2021 09:46:11 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org B24A93858435 From: "gabravier at gmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug target/102591] Failure to optimize search for value in vector-sized area to use SIMD Date: Tue, 05 Oct 2021 09:46:11 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: target X-Bugzilla-Version: 12.0 X-Bugzilla-Keywords: missed-optimization X-Bugzilla-Severity: normal X-Bugzilla-Who: gabravier at gmail dot com X-Bugzilla-Status: WAITING 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, 05 Oct 2021 09:46:11 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102591 --- Comment #2 from Gabriel Ravier --- memcpy can fail on unaligned memory ??? I used it specifically to avoid this problem ! (also, LLVM's code, I am pretty sure, does not have any issue with alignmen= t, as it uses either AVX instructions which care not for it, or specifically d= oes a movdqu (i.e. unaligned load) of the memory)=