From patchwork Fri Jul 10 23:34:30 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Wu, Wentong" X-Patchwork-Id: 1326946 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=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=intel.com Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 4B3HW04pR6z9sRK for ; Sat, 11 Jul 2020 01:47:56 +1000 (AEST) Received: from localhost ([::1]:33376 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jtvFi-0006Gw-Ao for incoming@patchwork.ozlabs.org; Fri, 10 Jul 2020 11:47:54 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:34586) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jtvEK-0005Nn-WE; Fri, 10 Jul 2020 11:46:29 -0400 Received: from mga02.intel.com ([134.134.136.20]:55298) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jtvEJ-0008Ob-AV; Fri, 10 Jul 2020 11:46:28 -0400 IronPort-SDR: 0qRnyIwsyObCp8JJ6ajXOYnwgFj1iZ1JMIlmi2ge0dL3s3aUxbO1e/hc+WE3swwvIaN25jJZWO eeWlJwJ3Llag== X-IronPort-AV: E=McAfee;i="6000,8403,9678"; a="136427512" X-IronPort-AV: E=Sophos;i="5.75,336,1589266800"; d="scan'208";a="136427512" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Jul 2020 08:46:15 -0700 IronPort-SDR: sNJvHibO3HmZs/Pemt+BXXteic9oJ7gh/dqpXIK/401nj86pC+dX9hrE/qIcifsvr37TJLQAZU f5SIjgji6e2A== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.75,336,1589266800"; d="scan'208";a="484686318" Received: from unknown (HELO localhost.localdomain.sh.intel.com) ([10.239.153.142]) by fmsmga005.fm.intel.com with ESMTP; 10 Jul 2020 08:46:14 -0700 From: Wentong Wu To: qemu-devel@nongnu.org, peter.maydell@linaro.org Subject: [PATCH v2 1/4] target/nios2: add DISAS_NORETURN case for nothing more to generate Date: Fri, 10 Jul 2020 19:34:30 -0400 Message-Id: <20200710233433.19729-1-wentong.wu@intel.com> X-Mailer: git-send-email 2.21.3 MIME-Version: 1.0 Received-SPF: pass client-ip=134.134.136.20; envelope-from=wentong.wu@intel.com; helo=mga02.intel.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/10 11:46:16 X-ACL-Warn: Detected OS = FreeBSD 9.x or newer [fuzzy] X-Spam_score_int: -22 X-Spam_score: -2.3 X-Spam_bar: -- X-Spam_report: (-2.3 / 5.0 requ) BAYES_00=-1.9, DATE_IN_FUTURE_06_12=1.947, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, 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: qemu-trivial@nongnu.org, marex@denx.de, crwulff@gmail.com, Wentong Wu Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Add DISAS_NORETURN case for nothing more to generate because at runtime execution will never return from some helper call. And at the same time replace DISAS_UPDATE in t_gen_helper_raise_exception and gen_exception with the newly added DISAS_NORETURN. Signed-off-by: Wentong Wu --- target/nios2/translate.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/target/nios2/translate.c b/target/nios2/translate.c index e17656e6..b052be85 100644 --- a/target/nios2/translate.c +++ b/target/nios2/translate.c @@ -149,7 +149,7 @@ static void t_gen_helper_raise_exception(DisasContext *dc, tcg_gen_movi_tl(dc->cpu_R[R_PC], dc->pc); gen_helper_raise_exception(dc->cpu_env, tmp); tcg_temp_free_i32(tmp); - dc->is_jmp = DISAS_UPDATE; + dc->is_jmp = DISAS_NORETURN; } static bool use_goto_tb(DisasContext *dc, uint32_t dest) @@ -802,7 +802,7 @@ static void gen_exception(DisasContext *dc, uint32_t excp) tcg_gen_movi_tl(cpu_R[R_PC], dc->pc); gen_helper_raise_exception(cpu_env, tmp); tcg_temp_free_i32(tmp); - dc->is_jmp = DISAS_UPDATE; + dc->is_jmp = DISAS_NORETURN; } /* generate intermediate code for basic block 'tb'. */ @@ -877,6 +877,7 @@ void gen_intermediate_code(CPUState *cs, TranslationBlock *tb, int max_insns) tcg_gen_exit_tb(NULL, 0); break; + case DISAS_NORETURN: case DISAS_TB_JUMP: /* nothing more to generate */ break;