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Wed, 30 Nov 2022 02:15:25 GMT Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id CEAFD4C040; Wed, 30 Nov 2022 02:21:53 +0000 (GMT) Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 06F9C4C044; Wed, 30 Nov 2022 02:21:53 +0000 (GMT) Received: from pike.rch.stglabs.ibm.com (unknown [9.5.12.127]) by d06av22.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 30 Nov 2022 02:21:52 +0000 (GMT) To: gcc-patches@gcc.gnu.org Cc: segher@kernel.crashing.org, dje.gcc@gmail.com, linkw@gcc.gnu.org, guojiufu@linux.ibm.com Subject: [PATCH] NFC: use more readable pattern to clean high 32 bits Date: Wed, 30 Nov 2022 10:21:52 +0800 Message-Id: <20221130022152.190824-1-guojiufu@linux.ibm.com> X-Mailer: git-send-email 2.17.1 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: c34SLM0kUWeQwAMZU1fStE17nfsjLl3x X-Proofpoint-ORIG-GUID: TfMxcCRYIcakGd5x5Z5Ca1xuZJsnGyfd X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.895,Hydra:6.0.545,FMLib:17.11.122.1 definitions=2022-11-30_02,2022-11-29_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 priorityscore=1501 mlxlogscore=999 mlxscore=0 clxscore=1015 adultscore=0 lowpriorityscore=0 bulkscore=0 spamscore=0 phishscore=0 malwarescore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2210170000 definitions=main-2211300009 X-Spam-Status: No, score=-11.9 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_EF, GIT_PATCH_0, RCVD_IN_MSPIKE_H2, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) 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: Jiufu Guo via Gcc-patches From: Jiufu Guo Reply-To: Jiufu Guo Errors-To: gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org Sender: "Gcc-patches" X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1750885954677878622?= X-GMAIL-MSGID: =?utf-8?q?1750885954677878622?= Hi, This patch is just using a more readable pattern for "rldicl x,x,0,32" to clean high 32bits. Old pattern looks like: r118:DI=zero_extend(r120:DI#0) new pattern looks like: r118:DI=r120:DI&0xffffffff Bootstrap and regtest pass on ppc64{,le}. Is this ok for trunk? BR, Jeff (Jiufu) gcc/ChangeLog: * config/rs6000/rs6000.cc (rs6000_emit_set_long_const): Update zero_extend(reg:DI#0) to reg:DI&0xffffffff --- gcc/config/rs6000/rs6000.cc | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/gcc/config/rs6000/rs6000.cc b/gcc/config/rs6000/rs6000.cc index eb7ad5e954f..5efe9b22d8b 100644 --- a/gcc/config/rs6000/rs6000.cc +++ b/gcc/config/rs6000/rs6000.cc @@ -10267,10 +10267,7 @@ rs6000_emit_set_long_const (rtx dest, HOST_WIDE_INT c) emit_move_insn (copy_rtx (temp), gen_rtx_IOR (DImode, copy_rtx (temp), GEN_INT (ud1))); - emit_move_insn (dest, - gen_rtx_ZERO_EXTEND (DImode, - gen_lowpart (SImode, - copy_rtx (temp)))); + emit_move_insn (dest, gen_rtx_AND (DImode, temp, GEN_INT (0xffffffff))); } else if (ud1 == ud3 && ud2 == ud4) {