From patchwork Thu Jul 6 19:19:48 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Luc Van Oostenryck X-Patchwork-Id: 9828795 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 8EB9A602CA for ; Thu, 6 Jul 2017 19:20:20 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4C05A285B7 for ; Thu, 6 Jul 2017 19:20:20 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 39EA42871E; Thu, 6 Jul 2017 19:20:20 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.3 required=2.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_HI, RCVD_IN_SORBS_SPAM, T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4DD7F28714 for ; Thu, 6 Jul 2017 19:20:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752833AbdGFTUC (ORCPT ); Thu, 6 Jul 2017 15:20:02 -0400 Received: from mail-wr0-f194.google.com ([209.85.128.194]:32983 "EHLO mail-wr0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752788AbdGFTUB (ORCPT ); Thu, 6 Jul 2017 15:20:01 -0400 Received: by mail-wr0-f194.google.com with SMTP id x23so2620638wrb.0 for ; Thu, 06 Jul 2017 12:20:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=DyrafgaQwTJTg3KJyrSm28dK+jj4p6B7WQ7XNNK/FWE=; b=hW2ELE00jfeOY8UcP+R6AkxngH/HGrBpXSvemh/AZ6m4mFfwB6evotN71TYafa/gOE Cd4Qt5XDbdEnudlVI3zkJSdNwXu8ZsuO7IBQg9VJ8B31frhlvUCg7J/YEH/3kbPpe4fK TxFunUIZ1GyIdHF4GAi4xGQwBFG3ti+134H2gv25Bg+x+mrFZU9B/UVQi+2wkOwsZtKy Qk3A9dgf0irQ9U+Q7QwcqLCm71zVR9MqdM4lOjF8JtW1YdcpCrdUroubcDF9dqFJL4Kp 98YGq//NzPqv+ciX50nyxllga8FzSQ7/QGQ/MXYMHhWVb6rhZXw4S9WBK6YdJvWz62Ww DTHg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=DyrafgaQwTJTg3KJyrSm28dK+jj4p6B7WQ7XNNK/FWE=; b=KQCejVK5WowJW3+M5RltiTuZuw5XdUzKTRtuRXukDEUJuCDYR855XM+TwZj/u8YYSt DVGEJcg1AuOgJ/QwtSHLH1XjvgulXer1hKkOHnyUNH/L3g+XOJLlIFZPPfaQzkBYLfk0 rwrpsJmKfzw/7hGm8UuRo6vRuRXwQP4nH2jP2GxvQwtX7uI84oxL1bzoXXiICDaUdOm2 YmvbjH9a1Y75rddE0V68l/MvyJBdAEqd6r2SmV354Lf3XEPk9wUIcgZv5r78s1NuA/ef 5G1FLgMTmg4K3J+MFI19naMxEUiwjH93HpL526aDH0YDmkrEtLhRtFvjW1S4TsoRA4FK CCNA== X-Gm-Message-State: AIVw112blT2Bvhqus2r7gqR+VhJyeIKlBBMf1eIllZneamrEBCHoDDz8 wxwLJWsy9E9MlA4CTOI= X-Received: by 10.28.128.67 with SMTP id b64mr505615wmd.79.1499368800384; Thu, 06 Jul 2017 12:20:00 -0700 (PDT) Received: from localhost.localdomain ([2a02:a03f:8ed:9a00:4423:4b1:a7de:145e]) by smtp.gmail.com with ESMTPSA id h6sm1105533wmf.31.2017.07.06.12.19.59 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 06 Jul 2017 12:19:59 -0700 (PDT) From: Luc Van Oostenryck To: linux-sparse@vger.kernel.org Cc: Christopher Li , Luc Van Oostenryck Subject: [PATCH 3/5] avoid crash in rewrite_branch() Date: Thu, 6 Jul 2017 21:19:48 +0200 Message-Id: <20170706191950.81268-4-luc.vanoostenryck@gmail.com> X-Mailer: git-send-email 2.13.0 In-Reply-To: <20170706191950.81268-1-luc.vanoostenryck@gmail.com> References: <20170706191950.81268-1-luc.vanoostenryck@gmail.com> Sender: linux-sparse-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sparse@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Signed-off-by: Luc Van Oostenryck --- flow.c | 2 +- validation/crash-rewrite-branch.c | 24 ++++++++++++++++++++++++ 2 files changed, 25 insertions(+), 1 deletion(-) create mode 100644 validation/crash-rewrite-branch.c diff --git a/flow.c b/flow.c index 3974984de..d8198ce8d 100644 --- a/flow.c +++ b/flow.c @@ -30,7 +30,7 @@ static int rewrite_branch(struct basic_block *bb, struct basic_block *old, struct basic_block *new) { - if (*ptr != old || new == old) + if (*ptr != old || new == old || !bb->ep) return 0; /* We might find new if-conversions or non-dominating CSEs */ diff --git a/validation/crash-rewrite-branch.c b/validation/crash-rewrite-branch.c new file mode 100644 index 000000000..eb310df1c --- /dev/null +++ b/validation/crash-rewrite-branch.c @@ -0,0 +1,24 @@ +void a(int c, int e) +{ + for(; b; c ; + + if (()) { + unsigned short d = e; + if (()) + while () + ; + &d; + } + + if (()) { + int f = &f; + } +} + +/* + * check-name: crash rewrite_branch + * check-command: test-linearize $file + * + * check-error-ignore + * check-output-ignore + */