From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id D198F399C083; Fri, 7 Jun 2024 06:53:57 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org D198F399C083 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1717743237; bh=nc8PI1i53aHeehx0m22urtryidnj0Eu1Sdhg4FW9tDA=; h=From:To:Subject:Date:In-Reply-To:References:From; b=FiRdk8HCGg3lTcU1omKJcAn4gWfcEVjD0+ZbWqdhUFFfUPJX4xgGjzZtWRZf/KGsd bo8zpfFprW4VLPd7U87nOIfF7Sg0Bb53wrmS+eqSyauq9XSRJHILFfQUIOzi4CDmbQ w3qunUpJrQ6ue86sS8zW2LXIOESJWDBH9OKjIwBQ= From: "jens.seifert at de dot ibm.com" To: gcc-bugs@gcc.gnu.org Subject: [Bug target/115355] [12/13/14/15 Regression] vectorization exposes wrong code on P9 LE starting from r12-4496 Date: Fri, 07 Jun 2024 06:53:56 +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: 12.2.1 X-Bugzilla-Keywords: wrong-code X-Bugzilla-Severity: normal X-Bugzilla-Who: jens.seifert at de dot ibm.com X-Bugzilla-Status: ASSIGNED X-Bugzilla-Resolution: X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: linkw at gcc dot gnu.org X-Bugzilla-Target-Milestone: 12.4 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=3D115355 --- Comment #10 from Jens Seifert --- Does this affect loop vectorize and slp vectorize ? -fno-tree-loop-vectorize avoids loop vectorization to be performed and workarounds this issue. Does the same problems also affect SLP vectorizatio= n, which does not take place in this sample. In other words, do I need -fno-tree-loop-vectorize or -fno-tree-vectorize to workaround this bug ?=