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[2620:52:3:1:0:246e:9693:128c]) by mx.google.com with ESMTPS id jo9-20020a170906f6c900b00992083e604fsi10083423ejb.154.2023.07.04.03.36.36 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 04 Jul 2023 03:36:36 -0700 (PDT) Received-SPF: pass (google.com: domain of gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org designates 2620:52:3:1:0:246e:9693:128c as permitted sender) client-ip=2620:52:3:1:0:246e:9693:128c; Authentication-Results: mx.google.com; dkim=pass header.i=@gcc.gnu.org header.s=default header.b=unvmYOqb; spf=pass (google.com: domain of gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org designates 2620:52:3:1:0:246e:9693:128c as permitted sender) smtp.mailfrom="gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=gnu.org Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 3A397385772E for ; Tue, 4 Jul 2023 10:36:35 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 3A397385772E DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1688466995; bh=X5cfo5cM7EmqrWuUfR5+ZCDogs/1IrVPhRij26qzij0=; h=Date:To:Subject:List-Id:List-Unsubscribe:List-Archive:List-Post: List-Help:List-Subscribe:From:Reply-To:From; b=unvmYOqb44OPgpFkMF4MrEhCF3Np4k8RczAt0Mdi+hY7psDKAB869kUUOTk3YRXyk TvFVes72SpVGT7hzbEMxtqeIvofoETTeBKaSMNdyKcPybWjNI6Q0hU2fdYHwNJRwNH +1F0j1jXX9Q4HDY9x8x1WnqiQLqH3vRZL7LutsVc= X-Original-To: gcc-patches@gcc.gnu.org Delivered-To: gcc-patches@gcc.gnu.org Received: from smtp-out1.suse.de (smtp-out1.suse.de [IPv6:2001:67c:2178:6::1c]) by sourceware.org (Postfix) with ESMTPS id 774AE385772A for ; Tue, 4 Jul 2023 10:35:07 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 774AE385772A Received: from relay2.suse.de (relay2.suse.de [149.44.160.134]) by smtp-out1.suse.de (Postfix) with ESMTP id B1A8322726 for ; Tue, 4 Jul 2023 10:35:06 +0000 (UTC) Received: from wotan.suse.de (wotan.suse.de [10.160.0.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by relay2.suse.de (Postfix) with ESMTPS id A90F12C141 for ; Tue, 4 Jul 2023 10:35:06 +0000 (UTC) Date: Tue, 4 Jul 2023 10:35:06 +0000 (UTC) To: gcc-patches@gcc.gnu.org Subject: [PATCH] Remove unnecessary check on scalar_niter == 0 User-Agent: Alpine 2.22 (LSU 394 2020-01-19) MIME-Version: 1.0 X-Spam-Status: No, score=-10.3 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, KAM_NUMSUBJECT, MISSING_MID, SPF_HELO_NONE, SPF_PASS, TXREP, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Richard Biener via Gcc-patches From: Richard Biener Reply-To: Richard Biener Errors-To: gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org Sender: "Gcc-patches" Message-Id: <20230704103635.3A397385772E@sourceware.org> X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1770485969228350334?= X-GMAIL-MSGID: =?utf-8?q?1770485969228350334?= The following removes an unnecessary check. Bootstrapped and tested on x86_64-unknown-linux-gnu, pushed. * tree-vect-loop.cc (vect_analyze_loop_costing): Remove check guarding scalar_niter underflow. --- gcc/tree-vect-loop.cc | 7 ------- 1 file changed, 7 deletions(-) diff --git a/gcc/tree-vect-loop.cc b/gcc/tree-vect-loop.cc index f39a1ecb306..3a43bbfa0ee 100644 --- a/gcc/tree-vect-loop.cc +++ b/gcc/tree-vect-loop.cc @@ -2180,13 +2180,6 @@ vect_analyze_loop_costing (loop_vec_info loop_vinfo, = LOOP_VINFO_PEELING_FOR_GAPS (orig_loop_vinfo) ? 1 : 0; scalar_niters = ((scalar_niters - gap - prolog_peeling) % lowest_vf + gap); - if (scalar_niters == 0) - { - if (dump_enabled_p ()) - dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location, - "not vectorized: loop never entered\n"); - return 0; - } } }