From patchwork Fri Jul 19 12:26:07 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Biener X-Patchwork-Id: 1134029 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=gcc.gnu.org (client-ip=209.132.180.131; helo=sourceware.org; envelope-from=gcc-patches-return-505337-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="sNXMlwsq"; 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 45qqx65xP3z9s4Y for ; Fri, 19 Jul 2019 22:26:18 +1000 (AEST) 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=YvpcxE08dQ+4Vq3/275zC7LQMI+3K+2rzprfC3O27xy4NgbSXhqTv s4mYSwgc5gculu/xYbLTAW8RYV73gyJ0gpBsvvI/8wQc4qBUCOLNACXdGzvzDEqK 90JJVRvv1FsyDAukl+CZJJwXkdOqzIUlMLcl0kq/9DrFQHwva80fZ8= 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=VDYwQ/hS+iqmoZOFAPC45sSwOeQ=; b=sNXMlwsql4ShO+PhXT+7 3bdSJXybmeuXBebNlzNu6fzwHV3ruRyKQP1ip5khLiV7LgJJg4RMpS/RAzuCuDd3 DcO+8wNDLB91jVcd817FlK9K0W4Wr+RMcjWrkoTsk2dixBHRiE3LzxYuuuMH7A9L XoAjgdJ88XgvKAfzncOPj0M= Received: (qmail 22935 invoked by alias); 19 Jul 2019 12:26:11 -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 22924 invoked by uid 89); 19 Jul 2019 12:26:11 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-10.2 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=UD:tree-ssa-sccvn.c, sk:push_pa, vn_walk_cb_data 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; Fri, 19 Jul 2019 12:26:09 +0000 Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id C630BAF37 for ; Fri, 19 Jul 2019 12:26:07 +0000 (UTC) Date: Fri, 19 Jul 2019 14:26:07 +0200 (CEST) From: Richard Biener To: gcc-patches@gcc.gnu.org Subject: [PATCH] Fix PR91211 Message-ID: User-Agent: Alpine 2.20 (LSU 67 2015-01-07) MIME-Version: 1.0 Another issue in partial-def VN. Bootstrap / regtest running on x86_64-unknown-linux-gnu. Richard. 2019-07-19 Richard Biener PR tree-optimization/91211 * tree-ssa-sccvn.c (vn_walk_cb_data::push_partial_def): Fix memset encoding size. * gcc.dg/torture/pr91211.c: New testcase. Index: gcc/tree-ssa-sccvn.c =================================================================== --- gcc/tree-ssa-sccvn.c (revision 273592) +++ gcc/tree-ssa-sccvn.c (working copy) @@ -1818,7 +1818,8 @@ vn_walk_cb_data::push_partial_def (const if (TREE_CODE (pd.rhs) == CONSTRUCTOR) /* Empty CONSTRUCTOR. */ memset (buffer + MAX (0, pd.offset), - 0, MIN ((HOST_WIDE_INT)sizeof (buffer), pd.size)); + 0, MIN ((HOST_WIDE_INT)sizeof (buffer), + pd.size + MIN (0, pd.offset))); else { unsigned pad = 0; Index: gcc/testsuite/gcc.dg/torture/pr91211.c =================================================================== --- gcc/testsuite/gcc.dg/torture/pr91211.c (nonexistent) +++ gcc/testsuite/gcc.dg/torture/pr91211.c (working copy) @@ -0,0 +1,19 @@ +/* { dg-do run } */ + +typedef __UINT32_TYPE__ u32; + +int +main (void) +{ + u32 b = 0x027C5902; + u32 a = 0; + __builtin_memset (1 + (char *) &b, 0, 2); + __builtin_memcpy (&a, 2 + (char *) &b, 2); +#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ + if (a != 0x00000200) +#else + if (a != 0x00020000) +#endif + __builtin_abort(); + return 0; +}