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GET /api/patches/2226760/?format=api
{ "id": 2226760, "url": "http://patchwork.ozlabs.org/api/patches/2226760/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/patch/bmm.hhup4p5wp2.gcc.gcc-TEST.pinskia.84.1.1@forge-stage.sourceware.org/", "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": "<bmm.hhup4p5wp2.gcc.gcc-TEST.pinskia.84.1.1@forge-stage.sourceware.org>", "list_archive_url": null, "date": "2026-04-22T18:49:09", "name": "[v1,01/10] fab/forwprop: Move memcmp->memcmp_eq to forwprop", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "73e89c7274a40876bbc03b4809c0a0cb5aabdb1e", "submitter": { "id": 93219, "url": "http://patchwork.ozlabs.org/api/people/93219/?format=api", "name": "Andrew Pinski via Sourceware Forge", "email": "forge-bot+pinskia@forge-stage.sourceware.org" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/gcc/patch/bmm.hhup4p5wp2.gcc.gcc-TEST.pinskia.84.1.1@forge-stage.sourceware.org/mbox/", "series": [ { "id": 501092, "url": "http://patchwork.ozlabs.org/api/series/501092/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/list/?series=501092", "date": "2026-04-22T18:49:11", "name": "remove_fab", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/501092/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2226760/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2226760/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 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; dmarc=none (p=none dis=none)\n header.from=forge-stage.sourceware.org", "sourceware.org;\n spf=pass smtp.mailfrom=forge-stage.sourceware.org", "server2.sourceware.org;\n arc=none smtp.remote-ip=38.145.34.39" ], "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 4g18Mt5RbCz1yGs\n\tfor <incoming@patchwork.ozlabs.org>; Thu, 23 Apr 2026 05:26:02 +1000 (AEST)", "from vm01.sourceware.org (localhost [127.0.0.1])\n\tby sourceware.org (Postfix) with ESMTP id B1B22402A55D\n\tfor <incoming@patchwork.ozlabs.org>; Wed, 22 Apr 2026 19:26:00 +0000 (GMT)", "from forge-stage.sourceware.org (vm08.sourceware.org [38.145.34.39])\n by sourceware.org (Postfix) with ESMTPS id A44B7407FF5B\n for <gcc-patches@gcc.gnu.org>; Wed, 22 Apr 2026 18:50:41 +0000 (GMT)", "from forge-stage.sourceware.org (localhost [IPv6:::1])\n (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n key-exchange x25519 server-signature ECDSA (prime256v1) server-digest SHA256)\n (No client certificate requested)\n by forge-stage.sourceware.org (Postfix) with ESMTPS id 7ED7843590\n for <gcc-patches@gcc.gnu.org>; Wed, 22 Apr 2026 18:50:41 +0000 (UTC)" ], "DKIM-Filter": [ "OpenDKIM Filter v2.11.0 sourceware.org B1B22402A55D", "OpenDKIM Filter v2.11.0 sourceware.org A44B7407FF5B" ], "DMARC-Filter": "OpenDMARC Filter v1.4.2 sourceware.org A44B7407FF5B", "ARC-Filter": "OpenARC Filter v1.0.0 sourceware.org A44B7407FF5B", "ARC-Seal": "i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1776883841; cv=none;\n b=Iywdg0vJ+tQj6XpiWAXDxFXmIcBSXu+P0B/1wSAXf6m083HYux1jsRqOK7xmDRZNh3dfjnw5VKwfzaWtbJAFzxoOAVAwwbyT0Kq2FpWNjEmrtUuhlEOJIfPFZ/YcAc5KesgMNYEHYUmIoyAGpvE1WHrPZrlG5RRxL9l2S9jN0QE=", "ARC-Message-Signature": "i=1; a=rsa-sha256; d=sourceware.org; s=key;\n t=1776883841; c=relaxed/simple;\n bh=Jr7/JNg6C2YvPndafb7ptWIOfqiPUr7cTAh4fsVmmB8=;\n h=From:Date:Subject:To:Message-ID;\n b=Fv/9pTUN5YyDRKCdl1ixt4i3wDReJmiWCMwbU1IZ1s0amHsM8JBQh/zkX1zmA+RsQ1Q0XKSlRG7hHeTCSZ6XKvb7P+CjKPJBNjFbmt2A5ON8w87C6IT18sTFKm7BGfnqw1sGyYxCsVMC2s+KLRYuZuduq5vl5m+6xN3iiggIqHw=", "ARC-Authentication-Results": "i=1; server2.sourceware.org", "From": "Andrew Pinski via Sourceware Forge\n <forge-bot+pinskia@forge-stage.sourceware.org>", "Date": "Wed, 22 Apr 2026 18:49:09 +0000", "Subject": "[PATCH v1 01/10] fab/forwprop: Move memcmp->memcmp_eq to forwprop", "To": "gcc-patches mailing list <gcc-patches@gcc.gnu.org>", "Message-ID": "\n <bmm.hhup4p5wp2.gcc.gcc-TEST.pinskia.84.1.1@forge-stage.sourceware.org>", "X-Mailer": "batrachomyomachia", "X-Pull-Request-Organization": "gcc", "X-Pull-Request-Repository": "gcc-TEST", "X-Pull-Request": "https://forge.sourceware.org/gcc/gcc-TEST/pulls/84", "References": "\n <bmm.hhup4p5wp2.gcc.gcc-TEST.pinskia.84.1.0@forge-stage.sourceware.org>", "In-Reply-To": "\n <bmm.hhup4p5wp2.gcc.gcc-TEST.pinskia.84.1.0@forge-stage.sourceware.org>", "X-Patch-URL": "\n https://forge.sourceware.org/pinskia/gcc-TEST/commit/934f80e6fb2acb7594c843278a5218c4bf583284", "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>", "Reply-To": "gcc-patches mailing list <gcc-patches@gcc.gnu.org>,\n pinskia@gcc.gnu.org", "Errors-To": "gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org" }, "content": "From: Andrew Pinski <andrew.pinski@oss.qualcomm.com>\n\nThis moves from the memcmp->memcmp_eq to forwprop by\nchecking PROP_last_full_fold.\n\nNote this means at -Og, we no longer optimize some\nmemcmp. That will be fixed when I exchange fab/copyprop\nfor a (late) forwprop.\n\nBootstrapped and tested on x86_64-linux-gnu.\n\ngcc/ChangeLog:\n\n\t* tree-ssa-ccp.cc (optimize_memcmp_eq): Remove.\n\t(pass_fold_builtins::execute): Remove handling of memcmp.\n\t* tree-ssa-forwprop.cc (simplify_builtin_memcmp): Add folding\n\tof memcmp to memcmp_eq for PROP_last_full_fold.\n\nSigned-off-by: Andrew Pinski <andrew.pinski@oss.qualcomm.com>\n---\n gcc/tree-ssa-ccp.cc | 34 ----------------------------------\n gcc/tree-ssa-forwprop.cc | 10 +++++++++-\n 2 files changed, 9 insertions(+), 35 deletions(-)", "diff": "diff --git a/gcc/tree-ssa-ccp.cc b/gcc/tree-ssa-ccp.cc\nindex 4165e596033f..1fbc3de2bfe7 100644\n--- a/gcc/tree-ssa-ccp.cc\n+++ b/gcc/tree-ssa-ccp.cc\n@@ -4205,36 +4205,6 @@ public:\n \n }; // class pass_fold_builtins\n \n-/* Optimize memcmp STMT into memcmp_eq if it is only used with\n- `== 0` or `!= 0`. */\n-\n-static void\n-optimize_memcmp_eq (gcall *stmt)\n-{\n- /* Make sure memcmp arguments are the correct type. */\n- if (gimple_call_num_args (stmt) != 3)\n- return;\n- tree arg1 = gimple_call_arg (stmt, 0);\n- tree arg2 = gimple_call_arg (stmt, 1);\n- tree len = gimple_call_arg (stmt, 2);\n-\n- if (!POINTER_TYPE_P (TREE_TYPE (arg1)))\n- return;\n- if (!POINTER_TYPE_P (TREE_TYPE (arg2)))\n- return;\n- if (!INTEGRAL_TYPE_P (TREE_TYPE (len)))\n- return;\n- /* The return value of the memcmp has to be used\n- equality comparison to zero. */\n- tree res = gimple_call_lhs (stmt);\n-\n- if (!res || !use_in_zero_equality (res))\n- return;\n-\n- gimple_call_set_fndecl (stmt, builtin_decl_explicit (BUILT_IN_MEMCMP_EQ));\n- update_stmt (stmt);\n-}\n-\n unsigned int\n pass_fold_builtins::execute (function *fun)\n {\n@@ -4291,10 +4261,6 @@ pass_fold_builtins::execute (function *fun)\n \t\t gsi_next (&i);\n \t\t continue;\n \n-\t\tcase BUILT_IN_MEMCMP:\n-\t\t optimize_memcmp_eq (as_a<gcall*>(stmt));\n-\t\t break;\n-\n \t\tcase BUILT_IN_UNREACHABLE:\n \t\t if (optimize_unreachable (i))\n \t\t cfg_changed = true;\ndiff --git a/gcc/tree-ssa-forwprop.cc b/gcc/tree-ssa-forwprop.cc\nindex 4c438a0f86c9..917f3d90f6c2 100644\n--- a/gcc/tree-ssa-forwprop.cc\n+++ b/gcc/tree-ssa-forwprop.cc\n@@ -1842,7 +1842,15 @@ simplify_builtin_memcmp (gimple_stmt_iterator *gsi_p, gcall *stmt)\n \t return true;\n \t}\n }\n- return false;\n+\n+ /* Replace memcmp with memcmp_eq if the above fails. */\n+ if (DECL_FUNCTION_CODE (gimple_call_fndecl (stmt)) == BUILT_IN_MEMCMP_EQ)\n+ return false;\n+ if (!(cfun->curr_properties & (PROP_last_full_fold)))\n+ return false;\n+ gimple_call_set_fndecl (stmt, builtin_decl_explicit (BUILT_IN_MEMCMP_EQ));\n+ update_stmt (stmt);\n+ return true;\n }\n \n /* Optimizes builtin memchrs for small constant sizes with a const string.\n", "prefixes": [ "v1", "01/10" ] }