From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0b-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by sourceware.org (Postfix) with ESMTPS id 956493858D1E for ; Mon, 17 Jul 2023 02:22:41 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 956493858D1E Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=linux.ibm.com Received: from pps.filterd (m0353722.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 36H1dVik015610 for ; Mon, 17 Jul 2023 02:22:41 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=message-id : date : mime-version : to : cc : from : subject : content-type : content-transfer-encoding; s=pp1; bh=5aPVRuJ/TsaB+lXdKQ9O/RJqg4+tLG8KfbFycpDdIP4=; b=dawM4tHQQ2AZEoolqhZcDiZplfPSrlBcRrM01dycfFVCQbRRQJsGu9nxobwRYbW8dJvF tWaO2E2NcXmTX21OoYa/QTf7GQiIB3T3Of7IJGwClF+N+du8T04DYnlT9BPs+r/r8PTY qzVGETqfb8rPB8VoI92iDiGZB1AjnJYjjLLZpDKBiwbPW/i4LZA2GPXEAMEfPX6m76KN mtX2hj110wFM4T0g82kzLwfL3hqrkuvF/Lw1OGEvf1/sESQDnpOvU7EvoalPMMFvhpFO xCW069SCvSmtvRo1Da9IWUkANBkPXf5nDKYVhubbU5aKHfaWIRTjxFYw73saB53RWpXM MA== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3rvtgx219t-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT) for ; Mon, 17 Jul 2023 02:22:40 +0000 Received: from m0353722.ppops.net (m0353722.ppops.net [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 36H2MecP026265 for ; Mon, 17 Jul 2023 02:22:40 GMT Received: from ppma06ams.nl.ibm.com (66.31.33a9.ip4.static.sl-reverse.com [169.51.49.102]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3rvtgx219f-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 17 Jul 2023 02:22:40 +0000 Received: from pps.filterd (ppma06ams.nl.ibm.com [127.0.0.1]) by ppma06ams.nl.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 36H2LmcH006923; Mon, 17 Jul 2023 02:22:38 GMT Received: from smtprelay07.fra02v.mail.ibm.com ([9.218.2.229]) by ppma06ams.nl.ibm.com (PPS) with ESMTPS id 3rujqe0wkq-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 17 Jul 2023 02:22:38 +0000 Received: from smtpav05.fra02v.mail.ibm.com (smtpav05.fra02v.mail.ibm.com [10.20.54.104]) by smtprelay07.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 36H2MaRH61210946 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 17 Jul 2023 02:22:36 GMT Received: from smtpav05.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id EE8FC20049; Mon, 17 Jul 2023 02:22:35 +0000 (GMT) Received: from smtpav05.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id EC8DD20043; Mon, 17 Jul 2023 02:22:34 +0000 (GMT) Received: from [9.177.92.246] (unknown [9.177.92.246]) by smtpav05.fra02v.mail.ibm.com (Postfix) with ESMTP; Mon, 17 Jul 2023 02:22:34 +0000 (GMT) Message-ID: <8baf564b-e742-0b95-c052-53b1082db372@linux.ibm.com> Date: Mon, 17 Jul 2023 10:22:32 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:91.0) Gecko/20100101 Thunderbird/91.6.1 Content-Language: en-US To: GCC Patches Cc: Richard Biener From: "Kewen.Lin" Subject: [PATCH] vect: Initialize new_temp to avoid false positive warning [PR110652] Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: 9xa_jMEBa8lwqmZe3tXTR3ee4Wi7L66p X-Proofpoint-ORIG-GUID: 29Y5jH37ejYRxhxPcR28FK2Tf_LC2kr0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-07-17_01,2023-07-13_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 bulkscore=0 priorityscore=1501 mlxscore=0 malwarescore=0 suspectscore=0 adultscore=0 phishscore=0 clxscore=1015 spamscore=0 impostorscore=0 mlxlogscore=859 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2306200000 definitions=main-2307170017 X-Spam-Status: No, score=-12.5 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_EF,GIT_PATCH_0,RCVD_IN_MSPIKE_H5,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,SPF_PASS,TXREP,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: Hi, As PR110652 and its duplicate PRs show, there could be one build error error: 'new_temp' may be used uninitialized for some build configurations. It's a false positive warning (or error at -Werror), but in order to make the build succeed, this patch is to initialize the reported variable 'new_temp' as NULL_TREE. Confirmed this patch fixed the reported issue in PR110652 (with the same configuration). Is it ok for trunk? BR, Kewen ----- PR tree-optimization/110652 gcc/ChangeLog: * tree-vect-stmts.cc (vectorizable_load): Initialize new_temp as NULL_TREE. --- gcc/tree-vect-stmts.cc | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/gcc/tree-vect-stmts.cc b/gcc/tree-vect-stmts.cc index c08d0ef951f..cb86d544313 100644 --- a/gcc/tree-vect-stmts.cc +++ b/gcc/tree-vect-stmts.cc @@ -9297,7 +9297,8 @@ vectorizable_load (vec_info *vinfo, class loop *containing_loop = gimple_bb (stmt_info->stmt)->loop_father; bool nested_in_vect_loop = false; tree elem_type; - tree new_temp; + /* Avoid false positive uninitialized warning, see PR110652. */ + tree new_temp = NULL_TREE; machine_mode mode; tree dummy; tree dataref_ptr = NULL_TREE; -- 2.31.1