From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 390E03858C83; Fri, 3 Mar 2023 12:31:30 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 390E03858C83 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1677846690; bh=0mJI6YswdhnRBZXZk9PlbGNb/8WyBYLHvlO0Awpel10=; h=From:To:Subject:Date:In-Reply-To:References:From; b=iWn04kBwgevKctzJoGvoVPsnOcfO5HsAujJ4mKRdvFWeGUNvmUJ93adAf9lAe317D fcy1tWNevoHCorxYrVWYOsd/usl+qVc+scdJWvLlZqskkl4tCpwv2bd3f7YBDrQ7/W 4lwe0g0+taD/lQvEi78g6d5hRc2GSNYACtmzsXKc= From: "jakub at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/109008] [13 Regression] Wrong code in scipy package since r13-3926-gd4c2f1d376da6f Date: Fri, 03 Mar 2023 12:31:29 +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: 13.0 X-Bugzilla-Keywords: wrong-code X-Bugzilla-Severity: normal X-Bugzilla-Who: jakub at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P1 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: 13.0 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 List-Id: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109008 --- Comment #5 from Jakub Jelinek --- Well, we already do that half ulp fuzzing in frange_arithmetic. The thing = is that for forward [1., 1.] - [1., -1.] it is really correctly [0., 0.], the subtracti= on is exact in that case. It is just the reverse operation which perhaps need some flag that would be propagated to frange_arithmetic and would make it fuzz even more.=