{"id":2227731,"url":"http://patchwork.ozlabs.org/api/1.1/patches/2227731/?format=json","web_url":"http://patchwork.ozlabs.org/project/gcc/patch/CAMe9rOqfjMdkw7z3ah1QyheFFF389fFgsNT+ge7RRFhj=Wt7Gg@mail.gmail.com/","project":{"id":17,"url":"http://patchwork.ozlabs.org/api/1.1/projects/17/?format=json","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},"msgid":"","date":"2026-04-24T07:20:26","name":"x86_cse: Use integer load for CONST_VECTOR load","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"f76a841f47717a99f176e8fa189dfb4932128211","submitter":{"id":4387,"url":"http://patchwork.ozlabs.org/api/1.1/people/4387/?format=json","name":"H.J. Lu","email":"hjl.tools@gmail.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/gcc/patch/CAMe9rOqfjMdkw7z3ah1QyheFFF389fFgsNT+ge7RRFhj=Wt7Gg@mail.gmail.com/mbox/","series":[{"id":501312,"url":"http://patchwork.ozlabs.org/api/1.1/series/501312/?format=json","web_url":"http://patchwork.ozlabs.org/project/gcc/list/?series=501312","date":"2026-04-24T07:20:26","name":"x86_cse: Use integer load for CONST_VECTOR load","version":1,"mbox":"http://patchwork.ozlabs.org/series/501312/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2227731/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2227731/checks/","tags":{},"headers":{"Return-Path":"","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=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=cnxfIO0j;\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; 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Fri, 24 Apr 2026\n 00:21:02 -0700 (PDT)","MIME-Version":"1.0","From":"\"H.J. Lu\" ","Date":"Fri, 24 Apr 2026 15:20:26 +0800","X-Gm-Features":"AQROBzCxWRPcIUwKqwU46XVoV-0j8IOmIEycE2N0RBt81-bGxObg2cPySKkmryw","Message-ID":"\n ","Subject":"[PATCH] x86_cse: Use integer load for CONST_VECTOR load","To":"GCC Patches , Uros Bizjak ,\n Hongtao Liu ","Content-Type":"multipart/mixed; boundary=\"00000000000081c1dc06502f9bda\"","X-BeenThere":"gcc-patches@gcc.gnu.org","X-Mailman-Version":"2.1.30","Precedence":"list","List-Id":"Gcc-patches mailing list ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org"},"content":"CONST_VECTOR load no larger than integer register\n\n(set (reg:V2QI 294)\n (const_vector:V2QI [(const_int 0 [0]) repeated x2]))\n\ncan use integer load. Use inner mode as the scalar mode for CONST_VECTOR\nload source.\n\ngcc/\n\nPR target/125009\n* config/i386/i386-features.cc (ix86_place_single_vector_set):\nSupport CONST_VECTOR load no larger than integer register.\n(ix86_broadcast_inner): Use inner mode as the scalar mode for\nCONST_VECTOR load source.\n(pass_x86_cse::x86_cse): Generate CONST_VECTOR broadcast source\nfor CONST_VECTOR load no larger than integer register.\n\ngcc/testsuite/\n\nPR target/125009\n* g++.target/i386/pr125009.C: New test.\n* gcc.target/i386/pr125009.c: Likewise.","diff":"From 672faf96fd4dbd36c70f33baf07670401d882177 Mon Sep 17 00:00:00 2001\nFrom: \"H.J. Lu\" \nDate: Fri, 24 Apr 2026 06:39:44 +0800\nSubject: [PATCH] x86_cse: Use integer load for CONST_VECTOR load\n\nCONST_VECTOR load no larger than integer register\n\n(set (reg:V2QI 294)\n (const_vector:V2QI [(const_int 0 [0]) repeated x2]))\n\ncan use integer load. Use inner mode as the scalar mode for CONST_VECTOR\nload source.\n\ngcc/\n\n\tPR target/125009\n\t* config/i386/i386-features.cc (ix86_place_single_vector_set):\n\tSupport CONST_VECTOR load no larger than integer register.\n\t(ix86_broadcast_inner): Use inner mode as the scalar mode for\n\tCONST_VECTOR load source.\n\t(pass_x86_cse::x86_cse): Generate CONST_VECTOR broadcast source\n\tfor CONST_VECTOR load no larger than integer register.\n\ngcc/testsuite/\n\n\tPR target/125009\n\t* g++.target/i386/pr125009.C: New test.\n\t* gcc.target/i386/pr125009.c: Likewise.\n\nSigned-off-by: H.J. Lu \n---\n gcc/config/i386/i386-features.cc | 35 +++++++++++++++++++++---\n gcc/testsuite/g++.target/i386/pr125009.C | 31 +++++++++++++++++++++\n gcc/testsuite/gcc.target/i386/pr125009.c | 21 ++++++++++++++\n 3 files changed, 83 insertions(+), 4 deletions(-)\n create mode 100644 gcc/testsuite/g++.target/i386/pr125009.C\n create mode 100644 gcc/testsuite/gcc.target/i386/pr125009.c\n\ndiff --git a/gcc/config/i386/i386-features.cc b/gcc/config/i386/i386-features.cc\nindex 0dd278a3ea6..a04efb52a3e 100644\n--- a/gcc/config/i386/i386-features.cc\n+++ b/gcc/config/i386/i386-features.cc\n@@ -3322,7 +3322,16 @@ ix86_place_single_vector_set (rtx dest, rtx src, bitmap bbs,\n \t}\n }\n \n- if (load && load->kind == X86_CSE_VEC_DUP)\n+ /* CONST_VECTOR load no larger than integer register\n+\n+ (set (reg:V2QI 294)\n+\t (const_vector:V2QI [(const_int 0 [0]) repeated x2]))\n+\n+ can use integer load. */\n+ if (load\n+ && load->kind == X86_CSE_VEC_DUP\n+ && (!CONST_VECTOR_P (src)\n+\t || GET_MODE_SIZE (GET_MODE (dest)) > UNITS_PER_WORD))\n {\n /* Get the source from LOAD as (reg:SI 99) in\n \n@@ -3759,7 +3768,10 @@ ix86_broadcast_inner (rtx op, machine_mode mode,\n \t if (!rtx_equal_p (tmp, first))\n \t return nullptr;\n \t}\n- *scalar_mode_p = GET_MODE (first);\n+ /* Use the inner mode to handle\n+\t (const_vector:V2QI [(const_int 0 [0]) repeated x2])\n+ */\n+ *scalar_mode_p = GET_MODE_INNER (mode);\n *insn_p = nullptr;\n return first;\n }\n@@ -4732,8 +4744,23 @@ pass_x86_cse::x86_cse (void)\n \t\t broadcast_source = CONSTM1_RTX (mode);\n \t\t break;\n \t\tcase X86_CSE_VEC_DUP:\n-\t\t reg = gen_reg_rtx (load->mode);\n-\t\t broadcast_source = gen_rtx_VEC_DUPLICATE (mode, reg);\n+\t\t if (CONST_INT_P (load->val)\n+\t\t && GET_MODE_SIZE (mode) <= UNITS_PER_WORD)\n+\t\t {\n+\t\t /* CONST_VECTOR load no larger than integer\n+\t\t\t register size can use integer load. */\n+\t\t int nunits = GET_MODE_NUNITS (mode);\n+\t\t rtvec v = rtvec_alloc (nunits);\n+\t\t for (int j = 0; j < nunits ; j++)\n+\t\t\tRTVEC_ELT (v, j) = load->val;\n+\t\t broadcast_source = gen_rtx_CONST_VECTOR (mode, v);\n+\t\t }\n+\t\t else\n+\t\t {\n+\t\t reg = gen_reg_rtx (load->mode);\n+\t\t broadcast_source = gen_rtx_VEC_DUPLICATE (mode,\n+\t\t\t\t\t\t\t\treg);\n+\t\t }\n \t\t break;\n \t\tdefault:\n \t\t gcc_unreachable ();\ndiff --git a/gcc/testsuite/g++.target/i386/pr125009.C b/gcc/testsuite/g++.target/i386/pr125009.C\nnew file mode 100644\nindex 00000000000..4b99e909f6c\n--- /dev/null\n+++ b/gcc/testsuite/g++.target/i386/pr125009.C\n@@ -0,0 +1,31 @@\n+/* { dg-do compile } */\n+/* { dg-options \"-mtune=generic -O2 -std=c++11\" } */\n+/* { dg-additional-options \"-march=pentiumpro\" { target ia32 } } */\n+\n+void *operator new(__SIZE_TYPE__, void *);\n+template struct hash_map {\n+ void put(Value v) {\n+ int e;\n+ new (&e) Value(v);\n+ }\n+};\n+struct tree_string {\n+ char str[];\n+} string;\n+long long minsize;\n+struct attr_access {\n+ bool internal_p;\n+ bool static_p;\n+} __trans_tmp_1;\n+hash_map init_attr_rdwr_indices_rwm;\n+void init_attr_rdwr_indices() {\n+ for (;;) {\n+ attr_access acc{};\n+ if (*string.str) {\n+ acc.internal_p = true;\n+ acc.static_p = minsize;\n+ }\n+ __trans_tmp_1 = acc;\n+ init_attr_rdwr_indices_rwm.put(acc);\n+ }\n+}\ndiff --git a/gcc/testsuite/gcc.target/i386/pr125009.c b/gcc/testsuite/gcc.target/i386/pr125009.c\nnew file mode 100644\nindex 00000000000..8a9935a4491\n--- /dev/null\n+++ b/gcc/testsuite/gcc.target/i386/pr125009.c\n@@ -0,0 +1,21 @@\n+/* { dg-do compile { target fpic } } */\n+/* { dg-options \"-mtune=generic -O2 -fPIC\" } */\n+/* { dg-additional-options \"-march=pentiumpro\" { target ia32 } } */\n+\n+struct target_var_desc {\n+ bool always_copy_from;\n+ bool is_attach;\n+};\n+struct target_mem_desc {\n+ struct target_var_desc list[];\n+};\n+void\n+gomp_map_vars_internal (int n, int l)\n+{\n+ struct target_mem_desc *tgt;\n+ int j;\n+ for (j = 0; j < l; j++)\n+ tgt->list[j].always_copy_from = tgt->list[j].is_attach = false;\n+ for (;j < n; j++)\n+ tgt->list[j].always_copy_from = tgt->list[j].is_attach = false;\n+}\n-- \n2.53.0\n\n","prefixes":[]}