From nobody Fri Jan 14 01:47:41 2022 X-Original-To: bugs@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 74899195223A for ; Fri, 14 Jan 2022 01:47:41 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4JZkhF1Fk4z3Q5G for ; Fri, 14 Jan 2022 01:47:41 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 034F03041 for ; Fri, 14 Jan 2022 01:47:41 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 20E1le7s061730 for ; Fri, 14 Jan 2022 01:47:40 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 20E1leJZ061729 for bugs@FreeBSD.org; Fri, 14 Jan 2022 01:47:40 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 259789] clang 9 and later performance regression using pointers to traverse arrays Date: Fri, 14 Jan 2022 01:47:41 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: bin X-Bugzilla-Version: Unspecified X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: jwb@freebsd.org X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: bugs@FreeBSD.org 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: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated List-Id: Bug reports List-Archive: https://lists.freebsd.org/archives/freebsd-bugs List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-bugs@freebsd.org MIME-Version: 1.0 ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1642124861; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=aDxyBDuplY3GSQPy3p//LQpwmG6I2NbfKe7Ashsf6D4=; b=eybHqmfJZCIvX2DZ/DUT6r15bH92syEacVfsq+EKHjv8ByDxRqB+F4kDel+U9BlYU+L8kz M6THPcz608H6yn23ijs09sSCjTMyLxCzXf07ibNmLdDoRzivmNnTmdokSLbuJytF3gzcdQ 4aWymVqXthoQWwwf0racY+GsQoV4/a3Z0g1NcV87ByRRrPdVYQtyGjgNhcPNYU6GxTZvM1 ixRDl0rXRnG6So/K/dbUiEOyLQSomdwTAvVX4UoNPkVgFHhbdlvyaP4pfnk39ejnlAhL1U 54cSbGVgRZ/XFii2IG2ozgwfgPA93BOJ/+Us6x63C7T44AFo1/MRo65CHfnBEQ== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1642124861; a=rsa-sha256; cv=none; b=maGEq1a/VbnWJWMDxFcDT7fgRJZiHRstfErAzVMFdZgyGhy2ZNiLn2tFyzYN4hkaz5X0rE rPjN20HCXFDsMFxr+3zMiQf6OV5KhbmUk9trfxAkHTpsx+gmWIi03MU7mCaAl96m9W8erw mij+XOeMWYUTjSJk0D+1wNCMnpcXQ9CyL1v+feamaC9GQaEJVEfguGbEi0Wpkvc4NntI2I DTKsLqzYRchcUsz+cna2OFMN2RxTpb4FtMUV78D1G2J0g4cqhTVFD9R4rdDAZ+R9Hbd/B0 OV43Y5yzvXeiPQ5oBzB29YCfnqYxw3fzLFnAl3alo0D2BUHNJROQcV6/tcb7SQ== ARC-Authentication-Results: i=1; mx1.freebsd.org; none X-ThisMailContainsUnwantedMimeParts: N https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D259789 --- Comment #1 from Jason W. Bacon --- I confirmed that the same issue exists (sort of) on MacOS with clang 13. T= he performance gap between subscripts and pointers is much less pronounced, but significant. --=20 You are receiving this mail because: You are the assignee for the bug.=