From patchwork Fri Jan 21 16:52:22 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andreas Krebbel X-Patchwork-Id: 50315 Return-Path: X-Original-To: patchwork@sourceware.org Delivered-To: patchwork@sourceware.org Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 03DE7385842B for ; Fri, 21 Jan 2022 16:53:10 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 03DE7385842B DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1642783990; bh=EATabwrSlgMpswj8xS+KETSmqWU7JZl0lqAe/9tB+p4=; h=To:Subject:Date:List-Id:List-Unsubscribe:List-Archive:List-Post: List-Help:List-Subscribe:From:Reply-To:From; b=xNRHdILDXmqfN5f71ZWKf3Czr6mIhDb+Ttdcc7F2dnisKIdjJhiuoAPuTas6nO4uS 9/vK8LhOmGr2XVTyIn/mw51PaCvs3O+8QnxL652Zpxqyev2OghTTxID7fmMd02zZ9R LtGWiijN2KbWmaWqIf1s4/Wy7yCcUzew1oFT2LHM= X-Original-To: gcc-patches@gcc.gnu.org Delivered-To: gcc-patches@gcc.gnu.org Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) by sourceware.org (Postfix) with ESMTPS id 8C443385AC3E for ; Fri, 21 Jan 2022 16:52:28 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 8C443385AC3E Received: from pps.filterd (m0098404.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.1.2/8.16.1.2) with SMTP id 20LGfiCe021710 for ; Fri, 21 Jan 2022 16:52:27 GMT Received: from ppma04ams.nl.ibm.com (63.31.33a9.ip4.static.sl-reverse.com [169.51.49.99]) by mx0a-001b2d01.pphosted.com with ESMTP id 3dr0jwg70a-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT) for ; Fri, 21 Jan 2022 16:52:27 +0000 Received: from pps.filterd (ppma04ams.nl.ibm.com [127.0.0.1]) by ppma04ams.nl.ibm.com (8.16.1.2/8.16.1.2) with SMTP id 20LGq0Vu032601 for ; Fri, 21 Jan 2022 16:52:25 GMT Received: from b06avi18626390.portsmouth.uk.ibm.com (b06avi18626390.portsmouth.uk.ibm.com [9.149.26.192]) by ppma04ams.nl.ibm.com with ESMTP id 3dqj37xm6f-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT) for ; Fri, 21 Jan 2022 16:52:24 +0000 Received: from d06av25.portsmouth.uk.ibm.com (d06av25.portsmouth.uk.ibm.com [9.149.105.61]) by b06avi18626390.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 20LGgwB531851006 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Fri, 21 Jan 2022 16:42:58 GMT Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 9A6C711C04A for ; Fri, 21 Jan 2022 16:52:22 +0000 (GMT) Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6856C11C04C for ; Fri, 21 Jan 2022 16:52:22 +0000 (GMT) Received: from li-23497a81-5215-11cb-9bae-a81330ecc14b.fritz.box (unknown [9.145.95.133]) by d06av25.portsmouth.uk.ibm.com (Postfix) with ESMTP for ; Fri, 21 Jan 2022 16:52:22 +0000 (GMT) To: gcc-patches@gcc.gnu.org Subject: [PATCH] PR101260 regcprop: Add mode change check for copy reg Date: Fri, 21 Jan 2022 17:52:22 +0100 Message-Id: <20220121165222.57530-1-krebbel@linux.ibm.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: hj1G5QGh9EAL4l2QdLFMn4ej2M-Bafat X-Proofpoint-GUID: hj1G5QGh9EAL4l2QdLFMn4ej2M-Bafat X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.816,Hydra:6.0.425,FMLib:17.11.62.513 definitions=2022-01-21_08,2022-01-21_01,2021-12-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 mlxscore=0 malwarescore=0 mlxlogscore=999 spamscore=0 bulkscore=0 priorityscore=1501 adultscore=0 clxscore=1015 suspectscore=0 phishscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2201110000 definitions=main-2201210108 X-Spam-Status: No, score=-11.4 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_EF, GIT_PATCH_0, RCVD_IN_MSPIKE_H4, RCVD_IN_MSPIKE_WL, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Andreas Krebbel via Gcc-patches From: Andreas Krebbel Reply-To: Andreas Krebbel Errors-To: gcc-patches-bounces+patchwork=sourceware.org@gcc.gnu.org Sender: "Gcc-patches" When propagating a multi-word register into an access with a smaller mode the can_change_mode backend hook is already consulted for the original register. This however is also required for the intermediate copy in copy_regno which might use a different register class. Bootstrapped on x86_64 and s390x. No testsuite regressions. Ok for mainline? gcc/ChangeLog: PR rtl-optimization/101260 * regcprop.cc (maybe_mode_change): Invoke mode_change_ok also for copy_regno. --- gcc/regcprop.cc | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/gcc/regcprop.cc b/gcc/regcprop.cc index 1a9bcf0a1ad..8e966f2b5ac 100644 --- a/gcc/regcprop.cc +++ b/gcc/regcprop.cc @@ -426,7 +426,8 @@ maybe_mode_change (machine_mode orig_mode, machine_mode copy_mode, if (orig_mode == new_mode) return gen_raw_REG (new_mode, regno); - else if (mode_change_ok (orig_mode, new_mode, regno)) + else if (mode_change_ok (orig_mode, new_mode, regno) + && mode_change_ok (copy_mode, new_mode, copy_regno)) { int copy_nregs = hard_regno_nregs (copy_regno, copy_mode); int use_nregs = hard_regno_nregs (copy_regno, new_mode);