From nobody Tue Feb 10 03:40:34 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org ARC-Seal: i=1; a=rsa-sha256; t=1604368948; cv=none; d=zohomail.com; s=zohoarc; b=d3hh72BcBSrAyuj4IXmcRJ2e8JIsNzWLSfwAGnfJ3UAepf6Gp9XUc9nOm2QiXc9iyKyr5SgkuUuRq9qtPn759YnCOzhnRnVJf72giGlPLXSoaiz2ghwd68v3UyyS1LJOt7Ddvooy6C/BfzhnpWnd6DG2qyhl+mJm7Rx/oAMx5xM= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1604368948; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=0WTJAdyY5VCcdsgX8UN9X61PfXobqoNrLj3onRR2QTI=; b=DDZfqiBaHW14OvPnOkhaufS/gWksepW4PgsthpYrk54s31b3APSa5zoOUrguq3hgFRscJGLJJZPepaZFc738iSQTMHLexDHZ1imzXshHkmXbT4kfvUhdWNjEUp8oRWpqEOncKc8jZ6YjNq0CFESCOoc/Yp9QJHU1vdRlTzQzLZ8= ARC-Authentication-Results: i=1; mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1604368948357635.1735772078299; Mon, 2 Nov 2020 18:02:28 -0800 (PST) Received: from localhost ([::1]:60316 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kZleU-0007Je-42 for importer@patchew.org; Mon, 02 Nov 2020 21:02:26 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:59974) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kZlWo-00027N-Gg; Mon, 02 Nov 2020 20:54:30 -0500 Received: from szxga05-in.huawei.com ([45.249.212.191]:2495) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kZlVM-0001md-Iv; Mon, 02 Nov 2020 20:54:30 -0500 Received: from DGGEMS410-HUB.china.huawei.com (unknown [172.30.72.59]) by szxga05-in.huawei.com (SkyGuard) with ESMTP id 4CQCTv1DNmzhdWD; Tue, 3 Nov 2020 09:52:51 +0800 (CST) Received: from huawei.com (10.175.104.175) by DGGEMS410-HUB.china.huawei.com (10.3.19.210) with Microsoft SMTP Server id 14.3.487.0; Tue, 3 Nov 2020 09:52:45 +0800 From: Chen Qun To: , Subject: [PATCH 1/6] target/xtensa: fix uninitialized variable warning Date: Tue, 3 Nov 2020 09:52:23 +0800 Message-ID: <20201103015228.2250547-2-kuhn.chenqun@huawei.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20201103015228.2250547-1-kuhn.chenqun@huawei.com> References: <20201103015228.2250547-1-kuhn.chenqun@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Originating-IP: [10.175.104.175] X-CFilter-Loop: Reflected Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=45.249.212.191; envelope-from=kuhn.chenqun@huawei.com; helo=szxga05-in.huawei.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/11/02 20:52:53 X-ACL-Warn: Detected OS = Linux 3.1-3.10 [fuzzy] X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Max Filippov , Chen Qun , zhang.zhanghailiang@huawei.com, ganqixin@huawei.com, Euler Robot Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" The compiler cannot determine whether the return values of the xtensa_opera= nd_is_register(isa, opc, opnd) and xtensa_operand_is_visible(isa, opc, opnd) functions are the same. So,it assumes that 'rf' is not assigned, but it's used. The compiler showed warning: target/xtensa/translate.c: In function =E2=80=98disas_xtensa_insn=E2=80=99: target/xtensa/translate.c:985:43: warning: =E2=80=98rf=E2=80=99 may be used= uninitialized in this function [-Wmaybe-uninitialized] 985 | arg[vopnd].num_bits =3D xtensa_regfile_num_bits= (isa, rf); | ^~~~~~~~~~~~~~~~~~~~~~~~~= ~~~~~~~ Add a default value for 'rf' to prevented the warning. Reported-by: Euler Robot Signed-off-by: Chen Qun --- Cc: Max Filippov --- target/xtensa/translate.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/target/xtensa/translate.c b/target/xtensa/translate.c index 944a157747..eea851bbe7 100644 --- a/target/xtensa/translate.c +++ b/target/xtensa/translate.c @@ -953,7 +953,7 @@ static void disas_xtensa_insn(CPUXtensaState *env, Disa= sContext *dc) =20 for (opnd =3D vopnd =3D 0; opnd < opnds; ++opnd) { void **register_file =3D NULL; - xtensa_regfile rf; + xtensa_regfile rf =3D -1; =20 if (xtensa_operand_is_register(isa, opc, opnd)) { rf =3D xtensa_operand_regfile(isa, opc, opnd); --=20 2.27.0