From patchwork Tue Nov 12 12:07:14 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Biener X-Patchwork-Id: 1193485 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=gcc.gnu.org (client-ip=209.132.180.131; helo=sourceware.org; envelope-from=gcc-patches-return-513095-incoming=patchwork.ozlabs.org@gcc.gnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=gcc.gnu.org header.i=@gcc.gnu.org header.b="avyd5nk3"; dkim-atps=neutral Received: from sourceware.org (server1.sourceware.org [209.132.180.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 47C61q2gBCz9sP4 for ; Tue, 12 Nov 2019 23:07:25 +1100 (AEDT) DomainKey-Signature: a=rsa-sha1; c=nofws; d=gcc.gnu.org; h=list-id :list-unsubscribe:list-archive:list-post:list-help:sender:date :from:to:subject:message-id:mime-version:content-type; q=dns; s= default; b=YM6gAHKBO4iNIrCyKEK4TzMZqoD7ByTHWre6CrAM21m3JaScqzLQS g+b9u7oLekK7V8LKgritwk8lCT/IcFZP2TQJKB3aJDGP8bwQxebTltSrd9UteSm+ VOL67dT6h/93N/kQFmvQk4QNDOSPsK3xlUJyXWbzHuWWYbC57OE538= DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=gcc.gnu.org; h=list-id :list-unsubscribe:list-archive:list-post:list-help:sender:date :from:to:subject:message-id:mime-version:content-type; s= default; bh=iTeBKW6WoaHtSztt11KSuH0ZIEI=; b=avyd5nk3doJOFJy9eCU6 WFNTjNcIaDMmjw+fBzm8PRNelnedQQ09T1kxWaBZAbrXyLdV+T9ibtmTuzPmvD7Z msfBrQVSn/3yR9a8jUIExygVwxkMNyDvcSxzE+UYypqpHu8qUhbIOMTUmGpEAOL+ prh+kPjLvWyVdW93/WhZWbE= Received: (qmail 124794 invoked by alias); 12 Nov 2019 12:07:17 -0000 Mailing-List: contact gcc-patches-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Archive: List-Post: List-Help: Sender: gcc-patches-owner@gcc.gnu.org Delivered-To: mailing list gcc-patches@gcc.gnu.org Received: (qmail 124780 invoked by uid 89); 12 Nov 2019 12:07:17 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-10.3 required=5.0 tests=AWL, BAYES_00, GIT_PATCH_2, GIT_PATCH_3, KAM_ASCII_DIVIDERS, KAM_NUMSUBJECT, SPF_PASS autolearn=ham version=3.3.1 spammy= X-HELO: mx1.suse.de Received: from mx2.suse.de (HELO mx1.suse.de) (195.135.220.15) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Tue, 12 Nov 2019 12:07:16 +0000 Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 13BB5B1AB for ; Tue, 12 Nov 2019 12:07:14 +0000 (UTC) Date: Tue, 12 Nov 2019 13:07:14 +0100 (CET) From: Richard Biener To: gcc-patches@gcc.gnu.org Subject: [PATCH] Fix PR92461 Message-ID: User-Agent: Alpine 2.21 (LSU 202 2017-01-01) MIME-Version: 1.0 Bootstrapped & tested on x86_64-unknown-linux-gnu, applied. Richard. 2019-11-12 Richard Biener PR tree-optimization/92461 * tree-vect-loop.c (vect_create_epilog_for_reduction): Update stmt after propagation. * gcc.dg/torture/pr92461.c: New testcase. Index: gcc/tree-vect-loop.c =================================================================== --- gcc/tree-vect-loop.c (revision 278081) +++ gcc/tree-vect-loop.c (working copy) @@ -5300,8 +5300,11 @@ vect_create_epilog_for_reduction (stmt_v orig_name = PHI_RESULT (exit_phi); scalar_result = scalar_results[k]; FOR_EACH_IMM_USE_STMT (use_stmt, imm_iter, orig_name) - FOR_EACH_IMM_USE_ON_STMT (use_p, imm_iter) - SET_USE (use_p, scalar_result); + { + FOR_EACH_IMM_USE_ON_STMT (use_p, imm_iter) + SET_USE (use_p, scalar_result); + update_stmt (use_stmt); + } } phis.release (); Index: gcc/testsuite/gcc.dg/torture/pr92461.c =================================================================== --- gcc/testsuite/gcc.dg/torture/pr92461.c (nonexistent) +++ gcc/testsuite/gcc.dg/torture/pr92461.c (working copy) @@ -0,0 +1,20 @@ +/* { dg-do compile } */ +/* { dg-additional-options "-ftree-vectorize" } */ + +short int zb; + +void +gs (void) +{ + while (zb < 1) + { + int at; + + zb %= 1; + + for (at = 0; at < 56; ++at) + zb += zb; + + ++zb; + } +}