From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by sourceware.org (Postfix) with ESMTPS id 277773858D1E; Mon, 29 Aug 2022 03:52:34 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 277773858D1E 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 (m0098419.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 27T3YbVM020726; Mon, 29 Aug 2022 03:52:32 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : references : date : in-reply-to : message-id : content-type : mime-version; s=pp1; bh=r29tSHiqi4oiXiPpyFhO2KiRTngypLpg7O+z43uxQSw=; b=MNxbaBgspYdq0sC6c1ZgMrhowzCzYj/leRb3uGhMS1bFFwmqEt+0bvR7HESw3DBwkKJQ j6X8iCa8OjEJO25mpJ+eOwavJ60sIcUCTGCKHg9tPCKuL7TA1133UfAYzu8Cy878hP2+ HwBeysnN80tLje1xi8vhVoD8fB5orNNAfZ8l6mJo0m8JWNbYvkxDyBBKtkTm1zStTUaT AVVoB0QmDHFsQm/Yre0KR8n5cZAfWbUaar0f12kJAa+aKo2qWI79ohGVxBr/eSQeL9PR IXkm2Z2rvdz8Kd1EauHwZG7YbCtbdNVxVO05TVArpEXx5ltZUR3UGzdbkUwZH0Ps0LK9 Yg== Received: from pps.reinject (localhost [127.0.0.1]) by mx0b-001b2d01.pphosted.com (PPS) with ESMTPS id 3j8nnrr82s-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 29 Aug 2022 03:52:32 +0000 Received: from m0098419.ppops.net (m0098419.ppops.net [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 27T3oNMC005552; Mon, 29 Aug 2022 03:52:31 GMT Received: from ppma05wdc.us.ibm.com (1b.90.2fa9.ip4.static.sl-reverse.com [169.47.144.27]) by mx0b-001b2d01.pphosted.com (PPS) with ESMTPS id 3j8nnrr82m-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 29 Aug 2022 03:52:31 +0000 Received: from pps.filterd (ppma05wdc.us.ibm.com [127.0.0.1]) by ppma05wdc.us.ibm.com (8.16.1.2/8.16.1.2) with SMTP id 27T3q5kW012949; Mon, 29 Aug 2022 03:52:31 GMT Received: from b03cxnp08027.gho.boulder.ibm.com (b03cxnp08027.gho.boulder.ibm.com [9.17.130.19]) by ppma05wdc.us.ibm.com with ESMTP id 3j7aw9arpf-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 29 Aug 2022 03:52:30 +0000 Received: from b03ledav002.gho.boulder.ibm.com (b03ledav002.gho.boulder.ibm.com [9.17.130.233]) by b03cxnp08027.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 27T3qU8u35717852 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 29 Aug 2022 03:52:30 GMT Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 043DC136051; Mon, 29 Aug 2022 03:52:30 +0000 (GMT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id BF0B313604F; Mon, 29 Aug 2022 03:52:29 +0000 (GMT) Received: from pike (unknown [9.5.12.127]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTPS; Mon, 29 Aug 2022 03:52:29 +0000 (GMT) From: Jiufu Guo To: gcc-patches@gcc.gnu.org Cc: segher@kernel.crashing.org, dje.gcc@gmail.com, linkw@gcc.gnu.org Subject: Re: [PATCH V2]HIGH part of symbol ref is invalid for constant pool[PR106460] References: <20220728122532.33232-1-guojiufu@linux.ibm.com> Date: Mon, 29 Aug 2022 11:52:27 +0800 In-Reply-To: <20220728122532.33232-1-guojiufu@linux.ibm.com> (Jiufu Guo's message of "Thu, 28 Jul 2022 20:25:32 +0800") Message-ID: <7er10zyadg.fsf@pike.rch.stglabs.ibm.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.2 (gnu/linux) Content-Type: text/plain X-TM-AS-GCONF: 00 X-Proofpoint-GUID: 3-9phnJg-8XQzQRe9l87EOrSQCbNw0pd X-Proofpoint-ORIG-GUID: F_ZOV0MiyghvjUoTMa4P_YkhmQkbSW-d X-Proofpoint-UnRewURL: 0 URL was un-rewritten MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.895,Hydra:6.0.517,FMLib:17.11.122.1 definitions=2022-08-29_01,2022-08-25_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 priorityscore=1501 bulkscore=0 adultscore=0 impostorscore=0 malwarescore=0 phishscore=0 mlxlogscore=999 lowpriorityscore=0 suspectscore=0 clxscore=1015 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2207270000 definitions=main-2208290017 X-Spam-Status: No, score=-12.0 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_EF,GIT_PATCH_0,KAM_SHORT,RCVD_IN_MSPIKE_H2,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: Jiufu Guo writes: New patch V6 is updated as: https://gcc.gnu.org/pipermail/gcc-patches/2022-August/600475.html. BR, Jeff(Jiufu) > Hi, > > As the issue in PR106460, a rtx 'high:DI (symbol_ref:DI ("var_48")' is tried > to store into constant pool. But actually, it indicates partial address, > which to be forced to constant memory. > > In function rs6000_cannot_force_const_mem, we already return true for > "HIGH with UNSPEC" rtx. For this function if GET_CODE (X) is HIGH, the "X" > represents the high part of a symbol ref, this function would also return > true. Below are some examples: > (high:DI (const:DI (plus:DI (symbol_ref:DI ("xx") (const_int 12 [0xc]))))) > (high:DI (symbol_ref:DI ("var_1")..))) > > This patch updates rs6000_cannot_force_const_mem to return true for > rtx with HIGH code. > > PR target/106460 > > gcc/ChangeLog: > > * config/rs6000/rs6000.cc (rs6000_cannot_force_const_mem): Return true > for HIGH code rtx. > > gcc/testsuite/ChangeLog: > > * gcc.target/powerpc/pr106460.c: New test. > > --- > gcc/config/rs6000/rs6000.cc | 7 +++++-- > gcc/testsuite/gcc.target/powerpc/pr106460.c | 11 +++++++++++ > 2 files changed, 16 insertions(+), 2 deletions(-) > create mode 100644 gcc/testsuite/gcc.target/powerpc/pr106460.c > > diff --git a/gcc/config/rs6000/rs6000.cc b/gcc/config/rs6000/rs6000.cc > index 0af2085adc0..d56832ebbfc 100644 > --- a/gcc/config/rs6000/rs6000.cc > +++ b/gcc/config/rs6000/rs6000.cc > @@ -9704,8 +9704,11 @@ rs6000_init_stack_protect_guard (void) > static bool > rs6000_cannot_force_const_mem (machine_mode mode ATTRIBUTE_UNUSED, rtx x) > { > - if (GET_CODE (x) == HIGH > - && GET_CODE (XEXP (x, 0)) == UNSPEC) > + /* If GET_CODE (x) is HIGH, the 'X' represets the high part of a symbol_ref. > + It indicates partial address, which can not be put into a constant pool. > + e.g. (high:DI (unspec:DI [(symbol_ref/u:DI ("*.LC0")..) > + (high:DI (symbol_ref:DI ("var")..)). */ > + if (GET_CODE (x) == HIGH) > return true; > > /* A TLS symbol in the TOC cannot contain a sum. */ > diff --git a/gcc/testsuite/gcc.target/powerpc/pr106460.c b/gcc/testsuite/gcc.target/powerpc/pr106460.c > new file mode 100644 > index 00000000000..ed7a994827b > --- /dev/null > +++ b/gcc/testsuite/gcc.target/powerpc/pr106460.c > @@ -0,0 +1,11 @@ > +/* { dg-options "-O1 -mdejagnu-cpu=power10" } */ > + > +/* (high:DI (symbol_ref:DI ("var_48")..))) should not cause ICE. */ > +extern short var_48; > +void > +foo (double *r) > +{ > + if (var_48) > + *r = 1234.5678; > +} > +