Patch Detail
get:
Show a patch.
patch:
Update a patch.
put:
Update a patch.
GET /api/1.1/patches/2230223/?format=api
{ "id": 2230223, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2230223/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/patch/20260429133156.8F3994BB3BE5@sourceware.org/", "project": { "id": 17, "url": "http://patchwork.ozlabs.org/api/1.1/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 }, "msgid": "<20260429133156.8F3994BB3BE5@sourceware.org>", "date": "2026-04-29T13:31:19", "name": "[x86,v2] override vector_costs::better_epilogue_loop_than_p", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "1bfea2635054d9b572aba01890c324f5135bcbf6", "submitter": { "id": 4338, "url": "http://patchwork.ozlabs.org/api/1.1/people/4338/?format=api", "name": "Richard Biener", "email": "rguenther@suse.de" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/gcc/patch/20260429133156.8F3994BB3BE5@sourceware.org/mbox/", "series": [ { "id": 502061, "url": "http://patchwork.ozlabs.org/api/1.1/series/502061/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/list/?series=502061", "date": "2026-04-29T13:31:19", "name": "[x86,v2] override vector_costs::better_epilogue_loop_than_p", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/502061/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2230223/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2230223/checks/", "tags": {}, "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 (1024-bit key;\n unprotected) header.d=suse.de header.i=@suse.de header.a=rsa-sha256\n header.s=susede2_rsa header.b=a4DqbqK1;\n\tdkim=pass header.d=suse.de header.i=@suse.de header.a=ed25519-sha256\n header.s=susede2_ed25519 header.b=hkJZeZDi;\n\tdkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de\n header.a=rsa-sha256 header.s=susede2_rsa header.b=Pl5EJ/m1;\n\tdkim=neutral header.d=suse.de header.i=@suse.de header.a=ed25519-sha256\n header.s=susede2_ed25519 header.b=Oq1JY/wD;\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 (1024-bit key,\n unprotected) header.d=suse.de header.i=@suse.de header.a=rsa-sha256\n header.s=susede2_rsa header.b=a4DqbqK1;\n\tdkim=pass header.d=suse.de header.i=@suse.de header.a=ed25519-sha256\n header.s=susede2_ed25519 header.b=hkJZeZDi;\n\tdkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de\n header.a=rsa-sha256 header.s=susede2_rsa header.b=Pl5EJ/m1;\n\tdkim=neutral header.d=suse.de header.i=@suse.de header.a=ed25519-sha256\n header.s=susede2_ed25519 header.b=Oq1JY/wD", "sourceware.org;\n dmarc=pass (p=none dis=none) header.from=suse.de", "sourceware.org; spf=pass smtp.mailfrom=suse.de", "server2.sourceware.org;\n arc=none smtp.remote-ip=195.135.223.130", "smtp-out1.suse.de;\n\tnone" ], "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 4g5JB646K7z1yHZ\n\tfor <incoming@patchwork.ozlabs.org>; Wed, 29 Apr 2026 23:31:58 +1000 (AEST)", "from vm01.sourceware.org (localhost [127.0.0.1])\n\tby sourceware.org (Postfix) with ESMTP id 8F3994BB3BE5\n\tfor <incoming@patchwork.ozlabs.org>; Wed, 29 Apr 2026 13:31:56 +0000 (GMT)", "from smtp-out1.suse.de (smtp-out1.suse.de [195.135.223.130])\n by sourceware.org (Postfix) with ESMTPS id 0F1524BA799D\n for <gcc-patches@gcc.gnu.org>; Wed, 29 Apr 2026 13:31:29 +0000 (GMT)", "from murzim.nue2.suse.org (unknown [10.168.4.243])\n (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest\n SHA256)\n (No client certificate requested)\n by smtp-out1.suse.de (Postfix) with ESMTPS id DDB996A883;\n Wed, 29 Apr 2026 13:31:19 +0000 (UTC)" ], "DKIM-Filter": [ "OpenDKIM Filter v2.11.0 sourceware.org 8F3994BB3BE5", "OpenDKIM Filter v2.11.0 sourceware.org 0F1524BA799D" ], "DMARC-Filter": "OpenDMARC Filter v1.4.2 sourceware.org 0F1524BA799D", "ARC-Filter": "OpenARC Filter v1.0.0 sourceware.org 0F1524BA799D", "ARC-Seal": "i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1777469489; cv=none;\n b=wzNLWswYn4MZ2TFQVOeq2cHR5L46uvZAQlfYZjQl1bj8S8hyUwcSQ+WT/Fm1U5KO/JpJx2oQAXppwFljmayMMWuoAY2xpwxmQPzLZiY53RMO4I55rS9KdDsrayb/m1McdpaJA0ffGc+YVXgFE0BwKL28tVFI9tE68iZ8uNT3o3w=", "ARC-Message-Signature": "i=1; a=rsa-sha256; d=sourceware.org; s=key;\n t=1777469489; c=relaxed/simple;\n bh=oojOzhIwdcIe19mxl5Eakazbxo2hg6EY22GJsADZqb0=;\n h=DKIM-Signature:DKIM-Signature:DKIM-Signature:DKIM-Signature:Date:\n From:To:Subject:MIME-Version;\n b=Uzq8LFJCHPXk1OQjX0GOYyInSJvN19oxU88/4tWrNDDvPsf9+h3zPcJyEZ5mkZNXS95V9Y3OlawNNxPCEVqdc8FGXX27sSx+hi0SUO1Ye9FpUqjtZ6Lu1c05kxVTPrrpXcFwotb5/Ghcju1TSthvsOtNUES93Zk69+cZQ57Kvyc=", "ARC-Authentication-Results": "i=1; server2.sourceware.org", "DKIM-Signature": [ "v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de;\n s=susede2_rsa;\n t=1777469484;\n h=from:from:reply-to:date:date:to:to:cc:cc:mime-version:mime-version:\n content-type:content-type; bh=Ti72Seq6OwgL5jb+EHSprGqeCyZZ0T+bwDe2UM8GELE=;\n b=a4DqbqK1EQtWXK4qyECwMvb8hlGL7KaGV8LQ/tqfWj1jXpLtGP/z7eWUixMpfiTGc2Kvmj\n wWiJmsb0Ve1AWhas8B5UU6PKbn3v3JRdcD9wxpkxkVV03h6Qy8YUoeaRQ4AXqFL+/7pJbs\n /7WbpJA+pLfb0ZBVHkvUHJkcNHMvTLU=", "v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de;\n s=susede2_ed25519; t=1777469484;\n h=from:from:reply-to:date:date:to:to:cc:cc:mime-version:mime-version:\n content-type:content-type; bh=Ti72Seq6OwgL5jb+EHSprGqeCyZZ0T+bwDe2UM8GELE=;\n b=hkJZeZDio7DC2GLe+JSihRuAh2GB7a7CCohLaVv76zDCIMOWu+wUG5dKcgOHupPFirYv+8\n kBJsmDdMcSUrOQCA==", "v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de;\n s=susede2_rsa;\n t=1777469479;\n h=from:from:reply-to:date:date:to:to:cc:cc:mime-version:mime-version:\n content-type:content-type; bh=Ti72Seq6OwgL5jb+EHSprGqeCyZZ0T+bwDe2UM8GELE=;\n b=Pl5EJ/m1fLxSzFYJzPyEWFEVS45pcXDXF+jzxO516ATMHFDmDPo3KZkvQ0e0NavNuJZFuH\n V/g8yQOOXi+p6uffTfIes407fZDk7tNrR5YEfchZGbyPDpol/ULznGfrcj71fuXVbq1bEo\n kgpfj1LP0zYJOB7dcKe+PS8B/VeNIVw=", "v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de;\n s=susede2_ed25519; t=1777469479;\n h=from:from:reply-to:date:date:to:to:cc:cc:mime-version:mime-version:\n content-type:content-type; bh=Ti72Seq6OwgL5jb+EHSprGqeCyZZ0T+bwDe2UM8GELE=;\n b=Oq1JY/wD33B3/WAubPL3eMglATgpaYjeb7LDpBkYwZpZUoWbuy92UFjz5sW+822JzN8uvB\n JOJntB5DwxXjmEAg==" ], "Date": "Wed, 29 Apr 2026 15:31:19 +0200 (CEST)", "From": "Richard Biener <rguenther@suse.de>", "To": "gcc-patches@gcc.gnu.org", "cc": "hongtao.liu@intel.com", "Subject": "[PATCH][x86][v2] override\n vector_costs::better_epilogue_loop_than_p", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=US-ASCII", "X-Spamd-Result": "default: False [-1.80 / 50.00]; BAYES_HAM(-3.00)[100.00%];\n MISSING_MID(2.50)[]; NEURAL_HAM_LONG(-1.00)[-1.000];\n NEURAL_HAM_SHORT(-0.20)[-0.998]; MIME_GOOD(-0.10)[text/plain];\n RCVD_COUNT_ZERO(0.00)[0]; MISSING_XM_UA(0.00)[];\n ARC_NA(0.00)[]; RCPT_COUNT_TWO(0.00)[2]; FROM_HAS_DN(0.00)[];\n TO_MATCH_ENVRCPT_ALL(0.00)[];\n DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519];\n FROM_EQ_ENVFROM(0.00)[]; TO_DN_NONE(0.00)[];\n MIME_TRACE(0.00)[0:+]", "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", "Message-Id": "<20260429133156.8F3994BB3BE5@sourceware.org>" }, "content": "The following resolves the gcc.target/i386/vect-epilogues-3.c failure\nwhen --param ix86-vect-compare-costs=1 is specified. When the target\nrequests multiple epilogues to be used and the new candidate is the\nepilogue of choice of the currently prevailing epilogue keep that.\n\nv2:\n\nBut avoid doing so if the new candidate uses a vectorization factor\nof one which should be an optimal vector epilog. This avoids\nregressing gcc.dg/vect/costmodel/x86_64/costmodel-pr122573.c\n\nBootstrapped and tested on x86_64-unknown-linux-gnu.\n\nRichard.\n\n\t* config/i386/i386.cc (ix86_vector_costs::better_epilogue_loop_than_p):\n\tNew. If the other loop suggests this as epilog prefer other.\n---\n gcc/config/i386/i386.cc | 21 +++++++++++++++++++++\n 1 file changed, 21 insertions(+)", "diff": "diff --git a/gcc/config/i386/i386.cc b/gcc/config/i386/i386.cc\nindex 6d34b23c2d6..e6aa31b6b24 100644\n--- a/gcc/config/i386/i386.cc\n+++ b/gcc/config/i386/i386.cc\n@@ -26126,6 +26126,8 @@ public:\n \t\t\t vect_cost_model_location where) override;\n void finish_cost (const vector_costs *) override;\n bool better_main_loop_than_p (const vector_costs *) const override;\n+ bool better_epilogue_loop_than_p (const vector_costs *other,\n+\t\t\t\t loop_vec_info main_loop) const;\n \n private:\n \n@@ -27007,6 +27009,25 @@ ix86_vector_costs::better_main_loop_than_p (const vector_costs *other) const\n return vector_costs::better_main_loop_than_p (other);\n }\n \n+/* Return true if THIS should be preferred over OTHER as epilog vector\n+ loop when vectorizing MAIN_LOOP. */\n+\n+bool\n+ix86_vector_costs::better_epilogue_loop_than_p (const vector_costs *other,\n+\t\t\t\t\t\tloop_vec_info main_loop) const\n+{\n+ loop_vec_info this_loop_info = as_a <loop_vec_info> (this->vinfo ());\n+ /* The x86 target allows for multiple vector epilogues, if THIS is\n+ the suggested epilog mode of OTHER then keep the latter unless\n+ THIS has a VF of one which means no further epilog needed. */\n+ int tem;\n+ if (known_gt (LOOP_VINFO_VECT_FACTOR (this_loop_info), 1U)\n+ && (GET_MODE_SIZE (other->suggested_epilogue_mode (tem))\n+\t == GET_MODE_SIZE (this_loop_info->vector_mode)))\n+ return false;\n+ return vector_costs::better_epilogue_loop_than_p (other, main_loop);\n+}\n+\n /* Validate target specific memory model bits in VAL. */\n \n static unsigned HOST_WIDE_INT\n", "prefixes": [ "x86", "v2" ] }