Patch Detail
get:
Show a patch.
patch:
Update a patch.
put:
Update a patch.
GET /api/patches/2217766/?format=api
{ "id": 2217766, "url": "http://patchwork.ozlabs.org/api/patches/2217766/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/patch/20260330144520.2643098-1-vijay@linux.ibm.com/", "project": { "id": 17, "url": "http://patchwork.ozlabs.org/api/projects/17/?format=api", "name": "GNU Compiler Collection", "link_name": "gcc", "list_id": "gcc-patches.gcc.gnu.org", "list_email": "gcc-patches@gcc.gnu.org", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260330144520.2643098-1-vijay@linux.ibm.com>", "list_archive_url": null, "date": "2026-03-30T14:45:20", "name": "rs6000: Optimize TLS access with combine patterns [PR27479]", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "4784123948c2940f2c522d7e4ac51c8899ac4e4b", "submitter": { "id": 91942, "url": "http://patchwork.ozlabs.org/api/people/91942/?format=api", "name": "Vijay Telidevulapalli", "email": "vijay@linux.ibm.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/gcc/patch/20260330144520.2643098-1-vijay@linux.ibm.com/mbox/", "series": [ { "id": 498041, "url": "http://patchwork.ozlabs.org/api/series/498041/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/list/?series=498041", "date": "2026-03-30T14:45:20", "name": "rs6000: Optimize TLS access with combine patterns [PR27479]", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/498041/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2217766/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2217766/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "gcc-patches@gcc.gnu.org" ], "Delivered-To": [ "patchwork-incoming@legolas.ozlabs.org", "gcc-patches@gcc.gnu.org" ], "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256\n header.s=pp1 header.b=VIQnvm3U;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=gcc.gnu.org\n (client-ip=2620:52:6:3111::32; helo=vm01.sourceware.org;\n envelope-from=gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org;\n receiver=patchwork.ozlabs.org)", "sourceware.org;\n\tdkim=pass (2048-bit key,\n unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256\n header.s=pp1 header.b=VIQnvm3U", "sourceware.org;\n dmarc=none (p=none dis=none) header.from=linux.ibm.com", "sourceware.org;\n spf=none smtp.mailfrom=kubota.pok.stglabs.ibm.com", "server2.sourceware.org;\n arc=none smtp.remote-ip=148.163.156.1" ], "Received": [ "from vm01.sourceware.org (vm01.sourceware.org\n [IPv6:2620:52:6:3111::32])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519 server-signature ECDSA (secp384r1) server-digest SHA384)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fkvFQ6FRFz1yG8\n\tfor <incoming@patchwork.ozlabs.org>; Tue, 31 Mar 2026 01:46:02 +1100 (AEDT)", "from vm01.sourceware.org (localhost [127.0.0.1])\n\tby sourceware.org (Postfix) with ESMTP id 702554BB58AE\n\tfor <incoming@patchwork.ozlabs.org>; Mon, 30 Mar 2026 14:46:00 +0000 (GMT)", "from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com\n [148.163.156.1])\n by sourceware.org (Postfix) with ESMTPS id CC15E4BA2E26\n for <gcc-patches@gcc.gnu.org>; Mon, 30 Mar 2026 14:45:31 +0000 (GMT)", "from pps.filterd (m0356517.ppops.net [127.0.0.1])\n by mx0a-001b2d01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id\n 62UCBQTD3595897; Mon, 30 Mar 2026 14:45:30 GMT", "from ppma13.dal12v.mail.ibm.com\n (dd.9e.1632.ip4.static.sl-reverse.com [50.22.158.221])\n by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 4d66q2ya97-1\n (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT);\n Mon, 30 Mar 2026 14:45:30 +0000 (GMT)", "from pps.filterd (ppma13.dal12v.mail.ibm.com [127.0.0.1])\n by ppma13.dal12v.mail.ibm.com (8.18.1.2/8.18.1.2) with ESMTP id\n 62UBF9uc031007;\n Mon, 30 Mar 2026 14:45:29 GMT", "from smtprelay03.dal12v.mail.ibm.com ([172.16.1.5])\n by ppma13.dal12v.mail.ibm.com (PPS) with ESMTPS id 4d6uhjn3nw-1\n (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT);\n Mon, 30 Mar 2026 14:45:29 +0000", "from smtpav06.wdc07v.mail.ibm.com (smtpav06.wdc07v.mail.ibm.com\n [10.39.53.233])\n by smtprelay03.dal12v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id\n 62UEjSsK29885018\n (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK);\n Mon, 30 Mar 2026 14:45:28 GMT", "from smtpav06.wdc07v.mail.ibm.com (unknown [127.0.0.1])\n by IMSVA (Postfix) with ESMTP id 62D715804E;\n Mon, 30 Mar 2026 14:45:28 +0000 (GMT)", "from smtpav06.wdc07v.mail.ibm.com (unknown [127.0.0.1])\n by IMSVA (Postfix) with ESMTP id 456D45803F;\n Mon, 30 Mar 2026 14:45:28 +0000 (GMT)", "from kubota.pok.stglabs.ibm.com (unknown [9.114.39.181])\n by smtpav06.wdc07v.mail.ibm.com (Postfix) with ESMTPS;\n Mon, 30 Mar 2026 14:45:28 +0000 (GMT)", "by kubota.pok.stglabs.ibm.com (Postfix, from userid 19539)\n id 47C3680B9D4B; Mon, 30 Mar 2026 09:45:23 -0500 (EST)" ], "DKIM-Filter": [ "OpenDKIM Filter v2.11.0 sourceware.org 702554BB58AE", "OpenDKIM Filter v2.11.0 sourceware.org CC15E4BA2E26" ], "DMARC-Filter": "OpenDMARC Filter v1.4.2 sourceware.org CC15E4BA2E26", "ARC-Filter": "OpenARC Filter v1.0.0 sourceware.org CC15E4BA2E26", "ARC-Seal": "i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1774881932; cv=none;\n b=SLLfIxQvXfycCAX7Gb1Q5+9ZMNQ97vfrO7zfQkI1kvsAvu7PS1pdl+ceoMPluN2y9Pqp6/xwal2/z7BASrvGlGqQW0KEPW0PxrjqfVhBje2HZKsOhSF9VuXdEpICCxu98DXQ2lH0M/vOQTvV1rZxhRpN/u2PBusEMLnsnb3cYVM=", "ARC-Message-Signature": "i=1; a=rsa-sha256; d=sourceware.org; s=key;\n t=1774881932; c=relaxed/simple;\n bh=QYm5kg2br0bpqohuq+dCHfSVeUtXXkcnUd7ozrUeX54=;\n h=DKIM-Signature:From:To:Subject:Date:Message-ID:MIME-Version;\n b=U/TxbLfja/RVI0+vLp09gEJM3HbP2QldinMPlr0mFx3WT9u3s04s1jkiRXurA/0tnmiTXP91X3vAkrkxA/lN31I1USOKcuzEUiWJh903pAJRWt70tdkaZSapLfwKVWixEqkUgVoXaV06yYsvQ6BF+Fk1vI6Op35JLO1XwUbiasU=", "ARC-Authentication-Results": "i=1; server2.sourceware.org", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc\n :content-transfer-encoding:date:from:message-id:mime-version\n :subject:to; s=pp1; bh=/6Z1tKSiJ431EY9oBYWXCV7IUMpUd22vFxz5g/84K\n Q0=; b=VIQnvm3Ur76+1POYtkJoRPLD7Gdeats20l77uuhwAQON/PIIoMdyJ7Kjj\n rhebrEbc11qFfbU6V9xOWOwa62feTKUCAOJrWtCvpVLly8Rdbsyqg56V88Vc+vbG\n AioA+Gy8rkl8rXu5LHAPAqxzKZupMMAgtOqXdTm8U0CqNoZ68AEaq3VN3Eqn/C1T\n AULlKQ4Y+l4MAIRjovFAG6/tcR7Jsda86tTgwXsYHENF70XkZpTQdnVw0Rx2JOqv\n IF6bTiFKTp29qDRvTim3S/H/ODFak2b6Iw4uyGDmXebixA0CMgiWSi0XpIubYhRl\n iFmFZospYdy4tE/EfFJUCBIhvOTNg==", "From": "Vijay Shankar <vijay@linux.ibm.com>", "To": "gcc-patches@gcc.gnu.org, segher@kernel.crashing.org,\n jskumari@linux.ibm.com, avinashd@linux.ibm.com", "Cc": "jeevitha@linux.ibm.com, meissner@linux.ibm.com, kishan@linux.ibm.com,\n Vijay Shankar <vijay@linux.ibm.com>", "Subject": "[PATCH] rs6000: Optimize TLS access with combine patterns [PR27479]", "Date": "Mon, 30 Mar 2026 09:45:20 -0500", "Message-ID": "<20260330144520.2643098-1-vijay@linux.ibm.com>", "X-Mailer": "git-send-email 2.47.3", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-TM-AS-GCONF": "00", "X-Proofpoint-GUID": "lfHF3DF0SISBam-ULPhb8Dz75xCn51-t", "X-Authority-Analysis": "v=2.4 cv=frzRpV4f c=1 sm=1 tr=0 ts=69ca8c8a cx=c_pps\n a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17\n a=Yq5XynenixoA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22\n a=U7nrCbtTmkRpXpFmAIza:22 a=VnNF1IyMAAAA:8 a=IUal1w-EYo0RRD3u3BkA:9", "X-Proofpoint-ORIG-GUID": "lfHF3DF0SISBam-ULPhb8Dz75xCn51-t", "X-Proofpoint-Spam-Details-Enc": "AW1haW4tMjYwMzMwMDExMiBTYWx0ZWRfX0tlOV5iEUgqU\n S/twSeIDVnNj16tDeCYhgTgdsKVmlAK04f1HrrXA311vSqw8jwhoDD7fSCYKO0dqPGwFbdurKgd\n sqVuhY93QrdMASFfGqFv42SKmVQ4M0xa7RiVUYeSfl00Yd984B22/ry2OgOGPpza6ZewfvyCy5Y\n kVbyOd/1LN7eFnqq3I5R9XT0eonBhLp+JqZskJuzIh7PKrmbeYWStKZS16gG5ASWoUCqFvfZawe\n +7xwzLg6Y1AuDOJWiu8ZzcbFayuqrxVS+fP3nokqMbkaxoczYVroUNDpynVeaKHi6zRsZpYTz6o\n fuMsZHrNzPKRt0nzi3mOclWotPa1pTkE+tiqONfqpto5c8AiCryuMXQVcU08+acBCx7ne+3YMXr\n WiwXvwAALJJVihdHxldgYhEWFwl/Lne84vBaqQGwPcblBMgWzF0gDB2OwFRhcLK7PBORasQroto\n OzfqiXh2IZSe/FX2LHw==", "X-Proofpoint-Virus-Version": "vendor=baseguard\n engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49\n definitions=2026-03-29_05,2026-03-28_01,2025-10-01_01", "X-Proofpoint-Spam-Details": "rule=outbound_notspam policy=outbound score=0\n impostorscore=0 spamscore=0 priorityscore=1501 malwarescore=0 clxscore=1015\n lowpriorityscore=0 bulkscore=0 adultscore=0 suspectscore=0 phishscore=0\n classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0\n reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2603300112", "X-BeenThere": "gcc-patches@gcc.gnu.org", "X-Mailman-Version": "2.1.30", "Precedence": "list", "List-Id": "Gcc-patches mailing list <gcc-patches.gcc.gnu.org>", "List-Unsubscribe": "<https://gcc.gnu.org/mailman/options/gcc-patches>,\n <mailto:gcc-patches-request@gcc.gnu.org?subject=unsubscribe>", "List-Archive": "<https://gcc.gnu.org/pipermail/gcc-patches/>", "List-Post": "<mailto:gcc-patches@gcc.gnu.org>", "List-Help": "<mailto:gcc-patches-request@gcc.gnu.org?subject=help>", "List-Subscribe": "<https://gcc.gnu.org/mailman/listinfo/gcc-patches>,\n <mailto:gcc-patches-request@gcc.gnu.org?subject=subscribe>", "Errors-To": "gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org" }, "content": "Reduce TLS variable access from 3 to 2 instructions by adding\ncombine patterns that merge address calculation with load.\n\nBefore:\n addis 9,13,x@tprel@ha\n addi 9,9,x@tprel@l\n lwz 3,0(9)\n\nAfter:\n addis 9,13,x@tprel@ha\n lwz 3,x@tprel@l(9)\n\nBootstrapped and tested on powerpc64le-linux-gnu with no regressions.\n\n2026-03-30 Vijay Shankar <vijay@linux.ibm.com>\n\ngcc/ChangeLog:\n\tPR target/27479\n\t* config/rs6000/rs6000.md (*tprel_ld_<az>_<HSI:mode>): New pattern.\n\t(*tprel_ld_QI_signed): New pattern.\n\t(*tprel_ld_QI): New pattern.\n\t(*tprel_ld_DI): New pattern.\n\t(*tprel_ld_<SFDF:mode>): New pattern.\n\ngcc/testsuite/ChangeLog:\n\tPR target/27479\n\t* gcc.target/powerpc/PR27479.c: New Test.\n---\n gcc/config/rs6000/rs6000.md | 56 ++++++++++++\n gcc/testsuite/gcc.target/powerpc/PR27479.c | 101 +++++++++++++++++++++\n 2 files changed, 157 insertions(+)\n create mode 100644 gcc/testsuite/gcc.target/powerpc/PR27479.c", "diff": "diff --git a/gcc/config/rs6000/rs6000.md b/gcc/config/rs6000/rs6000.md\nindex 308955155..f192010ee 100644\n--- a/gcc/config/rs6000/rs6000.md\n+++ b/gcc/config/rs6000/rs6000.md\n@@ -10567,6 +10567,62 @@\n \"la %0,%1@got@tlsgd@pcrel\"\n [(set_attr \"prefixed\" \"yes\")])\n \n+;;combine patterns for tls access\n+(define_insn \"*tprel_ld_<az>_<HSI:mode>\"\n+ [(set (match_operand:DI 0 \"gpc_reg_operand\" \"=r\")\n+\t(any_extend:DI\n+\t (mem:HSI\n+\t (unspec:P\n+\t [(match_operand:P 1 \"gpc_reg_operand\" \"b\")\n+\t (match_operand:P 2 \"rs6000_tls_symbol_ref\" \"\")]\n+\t UNSPEC_TLSTPRELLO))))]\n+ \"HAVE_AS_TLS\"\n+ \"l<HSI:wd><az> %0,%2@tprel@l(%1)\")\n+\n+;; Two instructions needed: lbz (zero-extend load byte) + extsb (sign-extend)\n+;; because there is no sign-extended load byte instruction, only zero-extended.\n+(define_insn \"*tprel_ld_QI_signed\"\n+ [(set (match_operand:DI 0 \"gpc_reg_operand\" \"=r\")\n+\t(sign_extend:DI\n+\t (mem:QI\n+\t (unspec:P\n+\t [(match_operand:P 1 \"gpc_reg_operand\" \"b\")\n+\t (match_operand:P 2 \"rs6000_tls_symbol_ref\" \"\")]\n+\t UNSPEC_TLSTPRELLO))))]\n+ \"HAVE_AS_TLS\"\n+ \"lbz %0,%2@tprel@l(%1)\\n\\textsb %0,%0\")\n+\n+(define_insn \"*tprel_ld_QI\"\n+ [(set (match_operand:DI 0 \"gpc_reg_operand\" \"=r\")\n+\t(zero_extend:DI\n+\t (mem:QI\n+\t (unspec:P\n+\t [(match_operand:P 1 \"gpc_reg_operand\" \"b\")\n+\t (match_operand:P 2 \"rs6000_tls_symbol_ref\" \"\")]\n+\t UNSPEC_TLSTPRELLO))))]\n+ \"HAVE_AS_TLS\"\n+ \"lbz %0,%2@tprel@l(%1)\")\n+\n+(define_insn \"*tprel_ld_DI\"\n+ [(set (match_operand:DI 0 \"gpc_reg_operand\" \"=r\")\n+\t(mem:DI\n+\t (unspec:P\n+\t [(match_operand:P 1 \"gpc_reg_operand\" \"b\")\n+\t (match_operand:P 2 \"rs6000_tls_symbol_ref\" \"\")]\n+\t UNSPEC_TLSTPRELLO)))]\n+ \"HAVE_AS_TLS\"\n+ \"ld %0,%2@tprel@l(%1)\")\n+\n+(define_insn \"*tprel_ld_<SFDF:mode>\"\n+ [(set (match_operand:SFDF 0 \"gpc_reg_operand\" \"=f\")\n+\t(mem:SFDF\n+\t (unspec:P\n+\t [(match_operand:P 1 \"gpc_reg_operand\" \"b\")\n+\t (match_operand:P 2 \"rs6000_tls_symbol_ref\" \"\")]\n+\t UNSPEC_TLSTPRELLO)))]\n+ \"HAVE_AS_TLS\"\n+ \"lf<SFDF:sd> %0,%2@tprel@l(%1)\")\n+\n (define_insn_and_split \"*tls_gd<bits>\"\n [(set (match_operand:P 0 \"gpc_reg_operand\" \"=b\")\n \t(unspec:P [(match_operand:P 1 \"rs6000_tls_symbol_ref\" \"\")\ndiff --git a/gcc/testsuite/gcc.target/powerpc/PR27479.c b/gcc/testsuite/gcc.target/powerpc/PR27479.c\nnew file mode 100644\nindex 000000000..236f72b4a\n--- /dev/null\n+++ b/gcc/testsuite/gcc.target/powerpc/PR27479.c\n@@ -0,0 +1,101 @@\n+/* { dg-do compile } */\n+/* { dg-options \"-O2 -mdejagnu-cpu=power9\" } */\n+\n+/* verify TLS access for 27479*/\n+struct xyz\n+{\n+ unsigned int x, y, z;\n+};\n+\n+__thread struct xyz x;\n+\n+/* TLS variables of many types. */\n+__thread unsigned char t_uc;\n+__thread signed char t_sc;\n+__thread unsigned short t_us;\n+__thread short t_ss;\n+__thread unsigned int t_ui;\n+__thread int t_si;\n+__thread unsigned long t_ul;\n+__thread long t_sl;\n+__thread _Bool t_bool;\n+__thread int *t_ptr;\n+\n+/* Floating-point. */\n+__thread float t_f;\n+__thread double t_d;\n+\n+unsigned long\n+foo_uc (void)\n+{\n+ return t_uc;\n+}\n+\n+long\n+foo_sc (void)\n+{\n+ return t_sc;\n+}\n+\n+unsigned long\n+foo_us (void)\n+{\n+ return t_us;\n+}\n+\n+long\n+foo_ss (void)\n+{\n+ return t_ss;\n+}\n+\n+unsigned long\n+foo_ui (void)\n+{\n+ return t_ui;\n+}\n+\n+long\n+foo_si (void)\n+{\n+ return t_si;\n+}\n+\n+unsigned long\n+foo_ul (void)\n+{\n+ return t_ul;\n+}\n+\n+long\n+foo_sl (void)\n+{\n+ return t_sl;\n+}\n+\n+unsigned long\n+foo_bool (void)\n+{\n+ return t_bool;\n+}\n+\n+int *\n+foo_ptr (void)\n+{\n+ return t_ptr;\n+}\n+\n+/* Floating-point accessors. */\n+float\n+foo_f (void)\n+{\n+ return t_f;\n+}\n+\n+double\n+foo_d (void)\n+{\n+ return t_d;\n+}\n+\n+/* { dg-final { scan-assembler-not {\\maddi\\M} } } */\n", "prefixes": [] }