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GET /api/1.2/patches/2223516/?format=api
{ "id": 2223516, "url": "http://patchwork.ozlabs.org/api/1.2/patches/2223516/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/patch/20260415124947.1625613-1-vijay@linux.ibm.com/", "project": { "id": 17, "url": "http://patchwork.ozlabs.org/api/1.2/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": "<20260415124947.1625613-1-vijay@linux.ibm.com>", "list_archive_url": null, "date": "2026-04-15T12:49:47", "name": "[v2] rs6000: Optimize TLS access with combine patterns [PR27479]", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "7e251200dc185c5dd10c944c720f22c50d4c9de6", "submitter": { "id": 91942, "url": "http://patchwork.ozlabs.org/api/1.2/people/91942/?format=api", "name": "Vijay shankar telidevulapalli", "email": "vijay@linux.ibm.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/gcc/patch/20260415124947.1625613-1-vijay@linux.ibm.com/mbox/", "series": [ { "id": 499986, "url": "http://patchwork.ozlabs.org/api/1.2/series/499986/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/list/?series=499986", "date": "2026-04-15T12:49:47", "name": "[v2] rs6000: Optimize TLS access with combine patterns [PR27479]", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/499986/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2223516/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2223516/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" ], 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"gcc-patches@gcc.gnu.org, segher@kernel.crashing.org,\n meissner@linux.ibm.com, jskumari@linux.ibm.com, avinashd@linux.ibm.com", "Cc": "jeevitha@linux.ibm.com, kishan@linux.ibm.com,\n Vijay Shankar <vijay@linux.ibm.com>", "Subject": "[PATCH v2] rs6000: Optimize TLS access with combine patterns\n [PR27479]", "Date": "Wed, 15 Apr 2026 07:49:47 -0500", "Message-ID": "<20260415124947.1625613-1-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-Spam-Details-Enc": "AW1haW4tMjYwNDE1MDExOSBTYWx0ZWRfX8msqRuPMbQbE\n o2V+50FrXbN7o0kQ3jA92kQ0FWDagjIq3ca8eHRp3rxMNCPxeQWAUU9vphLphb4qF7Kfkb+1FTZ\n FtdijG/VpmK53NjnlGUm1iOwxYb4+zU7lbImyYfv54KWOUoUHcDjpKxqZ2g0fhyvknXE2amrmEy\n N8AWUBZtkfUSdSuXpdtjOoHiQKALqX9h1V0I8W7j8u0mtPGV4nGn3BERBQw04ENJfcs6a9LLgS4\n i1086Rg1BwHjsYRCY/Yk3dZdW7MHd1Hq8UZhcDDyqRKYNXm46RF1HOB230tFe1s5rC+2czGuFGw\n 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classifier=typeunknown authscore=0 authtc= authcc=\n route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604070000\n definitions=main-2604150119", "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": "Changes from v1:\n\t* update tprel_ld_QI_signed to use define_insn_and_split\n\t* renamed PR27479.c to pr27479.c and removed dead code\n\nReduce 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\n2026-04-15 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 | 71 ++++++++++++++++\n gcc/testsuite/gcc.target/powerpc/pr27479.c | 95 ++++++++++++++++++++++\n 2 files changed, 166 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..0064a1871 100644\n--- a/gcc/config/rs6000/rs6000.md\n+++ b/gcc/config/rs6000/rs6000.md\n@@ -10567,6 +10567,77 @@\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+ [(set_attr \"type\" \"load\")])\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_and_split \"*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+ \"#\"\n+ \"&& reload_completed\"\n+ [(set (match_dup 0)\n+\t(zero_extend:DI\n+\t (mem:QI\n+\t (unspec:P\n+\t [(match_dup 1)\n+\t (match_dup 2)]\n+\t UNSPEC_TLSTPRELLO))))\n+ (set (match_dup 0)\n+\t(sign_extend:DI\n+\t (subreg:QI (match_dup 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+ [(set_attr \"type\" \"load\")])\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+ [(set_attr \"type\" \"load\")])\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+ [(set_attr \"type\" \"fpload\")])\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..3f43643b3\n--- /dev/null\n+++ b/gcc/testsuite/gcc.target/powerpc/pr27479.c\n@@ -0,0 +1,95 @@\n+/* { dg-do compile } */\n+/* { dg-options \"-O2 -mdejagnu-cpu=power9\" } */\n+\n+/* verify TLS access for PR27479*/\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": [ "v2" ] }