From owner-freebsd-bugs@freebsd.org Sun Jun 21 09:25:16 2020 Return-Path: Delivered-To: freebsd-bugs@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id D9A75347EF7 for ; Sun, 21 Jun 2020 09:25:16 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.nyi.freebsd.org (mailman.nyi.freebsd.org [IPv6:2610:1c1:1:606c::50:13]) by mx1.freebsd.org (Postfix) with ESMTP id 49qRwD5Wfzz4d56 for ; Sun, 21 Jun 2020 09:25:16 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.nyi.freebsd.org (Postfix) id BD6B334823D; Sun, 21 Jun 2020 09:25:16 +0000 (UTC) Delivered-To: bugs@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id BD356347EF5 for ; Sun, 21 Jun 2020 09:25:16 +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 "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 49qRwD4fcXz4dMm for ; Sun, 21 Jun 2020 09:25:16 +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 9B2A11B2C8 for ; Sun, 21 Jun 2020 09:25:16 +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 05L9PG3j057491 for ; Sun, 21 Jun 2020 09:25:16 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from bugzilla@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 05L9PG78057490 for bugs@FreeBSD.org; Sun, 21 Jun 2020 09:25:16 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: bugzilla set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 246630] stable/11 regression: base.txz reproducibility depends on number of cpu cores Date: Sun, 21 Jun 2020 09:25:16 +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: regression X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: commit-hook@freebsd.org X-Bugzilla-Status: Open 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 MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 21 Jun 2020 09:25:16 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D246630 --- Comment #36 from commit-hook@freebsd.org --- A commit references this bug: Author: dim Date: Sun Jun 21 09:24:48 UTC 2020 New revision: 362461 URL: https://svnweb.freebsd.org/changeset/base/362461 Log: MFC r362341: Merge commit 0cecafd647cc from llvm git (by Alina Sbirlea): [BasicAA] Make BasicAA a cfg pass. Summary: Part of the changes in D44564 made BasicAA not CFG only due to it using PhiAnalysisValues which may have values invalidated. Subsequent patches (rL340613) appear to have addressed this limitation. BasicAA should not be invalidated by non-CFG-altering passes. A concrete example is MemCpyOpt which preserves CFG, but we are testing it invalidates BasicAA. llvm-dev RFC: https://groups.google.com/forum/#!topic/llvm-dev/eSPXuWnNfzM Reviewers: john.brawn, sebpop, hfinkel, brzycki Subscribers: hiraditya, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D74353 This fixes an issue with clang's -fintegrated-cc1 feature, which could make it output slightly different assembly code, depending on the way it was invoked. In r361755 we attempted to work around it by disabling the integrated cc1 stage, but it did not solve the root cause for all situations. Extensive testing and bisecting showed that the above change finally makes the output deterministic, even if -fintegrated-cc1 is on. Reported by: Fabian Keil PR: 246630 Changes: _U stable/11/ _U stable/11/contrib/llvm-project/llvm/ stable/11/contrib/llvm-project/llvm/lib/Analysis/BasicAliasAnalysis.cpp stable/11/lib/clang/include/clang/Config/config.h _U stable/12/ stable/12/contrib/llvm-project/llvm/lib/Analysis/BasicAliasAnalysis.cpp stable/12/lib/clang/include/clang/Config/config.h --=20 You are receiving this mail because: You are the assignee for the bug.=