From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 08063C7618D for ; Mon, 20 Mar 2023 13:06:54 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1peFAy-0001CT-5t; Mon, 20 Mar 2023 09:03:48 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1peFAv-0001Ao-8c for qemu-devel@nongnu.org; Mon, 20 Mar 2023 09:03:45 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1peFAt-0006AW-Ft for qemu-devel@nongnu.org; Mon, 20 Mar 2023 09:03:44 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1679317420; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=s0wxJiXYClXSoa8e5D2eDibhzd3LookEebaQeXBZ0QQ=; b=HSp06L+6/kOkn9uTXk8TIgWVvuxDAGM4K53oA4W37sRxwCIlv2LAh9UZTMBjkPZH72uiZc w5UyRR6i1MqlrrLG9Nxp+9jgLkjYFsKInO7NS1uXKzB0BVN3HJ5vvtffp/S2802eQK4Su5 4fjB2Tl0w8hDQscIyeiZEpX6efMjNRg= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-413-iq4FSI6eOJmV-Bd48SfcAQ-1; Mon, 20 Mar 2023 09:03:39 -0400 X-MC-Unique: iq4FSI6eOJmV-Bd48SfcAQ-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.rdu2.redhat.com [10.11.54.8]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id E85F61818E53; Mon, 20 Mar 2023 13:03:38 +0000 (UTC) Received: from thuth.com (unknown [10.39.193.77]) by smtp.corp.redhat.com (Postfix) with ESMTP id 16006C15BA0; Mon, 20 Mar 2023 13:03:37 +0000 (UTC) From: Thomas Huth To: Peter Maydell , qemu-devel@nongnu.org Cc: Ilya Leoshkevich , David Hildenbrand Subject: [PULL 05/24] target/s390x: Fix R[NOX]SBG with T=1 Date: Mon, 20 Mar 2023 14:03:11 +0100 Message-Id: <20230320130330.406378-6-thuth@redhat.com> In-Reply-To: <20230320130330.406378-1-thuth@redhat.com> References: <20230320130330.406378-1-thuth@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.1 on 10.11.54.8 Received-SPF: pass client-ip=170.10.129.124; envelope-from=thuth@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, 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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Ilya Leoshkevich RXSBG usage in the "filetests" test from the wasmtime testsuite makes tcg_reg_alloc_op() attempt to temp_load() a TEMP_VAL_DEAD temporary, causing an assertion failure: 0x01000a70: ec14 b040 3057 rxsbg %r1, %r4, 0xb0, 0x40, 0x30 OP after optimization and liveness analysis: ---- 0000000001000a70 0000000000000004 0000000000000006 rotl_i64 tmp2,r4,$0x30 dead: 1 2 pref=0xffff and_i64 tmp2,tmp2,$0x800000000000ffff dead: 1 pref=0xffff [xor_i64 tmp3,tmp3,tmp2 dead: 1 2 pref=0xffff] and_i64 cc_dst,tmp3,$0x800000000000ffff sync: 0 dead: 0 1 2 pref=0xffff mov_i64 psw_addr,$0x1000a76 sync: 0 dead: 0 1 pref=0xffff mov_i32 cc_op,$0x6 sync: 0 dead: 0 1 pref=0xffff call lookup_tb_ptr,$0x6,$1,tmp8,env dead: 1 pref=none goto_ptr tmp8 dead: 0 set_label $L0 exit_tb $0x7fffe809d183 ../tcg/tcg.c:3865: tcg fatal error The reason is that tmp3 does not have an initial value, which confuses the register allocator. This also affects the correctness of the results. Fix by assigning R1 to it. Exposed by commit e2e641fa3d5 ("tcg: Change default temp lifetime to TEMP_TB"). Fixes: d6c6372e186e ("target-s390: Implement R[NOX]SBG") Signed-off-by: Ilya Leoshkevich Reviewed-by: David Hildenbrand Message-Id: <20230316172205.281369-2-iii@linux.ibm.com> Signed-off-by: Thomas Huth --- target/s390x/tcg/translate.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/target/s390x/tcg/translate.c b/target/s390x/tcg/translate.c index 7832cf02a6..6758d9f47a 100644 --- a/target/s390x/tcg/translate.c +++ b/target/s390x/tcg/translate.c @@ -3697,11 +3697,15 @@ static DisasJumpType op_rosbg(DisasContext *s, DisasOps *o) int i3 = get_field(s, i3); int i4 = get_field(s, i4); int i5 = get_field(s, i5); + TCGv_i64 orig_out; uint64_t mask; /* If this is a test-only form, arrange to discard the result. */ if (i3 & 0x80) { + tcg_debug_assert(o->out != NULL); + orig_out = o->out; o->out = tcg_temp_new_i64(); + tcg_gen_mov_i64(o->out, orig_out); } i3 &= 63; -- 2.31.1