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 X-Spam-Level: X-Spam-Status: No, score=-10.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1A2F0C4361B for ; Tue, 15 Dec 2020 15:42:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D8403224B8 for ; Tue, 15 Dec 2020 15:42:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730259AbgLOPlr (ORCPT ); Tue, 15 Dec 2020 10:41:47 -0500 Received: from wtarreau.pck.nerim.net ([62.212.114.60]:48466 "EHLO 1wt.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730242AbgLOPlg (ORCPT ); Tue, 15 Dec 2020 10:41:36 -0500 Received: (from willy@localhost) by pcw.home.local (8.15.2/8.15.2/Submit) id 0BFFekxC005572; Tue, 15 Dec 2020 16:40:46 +0100 Date: Tue, 15 Dec 2020 16:40:46 +0100 From: Willy Tarreau To: kernel test robot Cc: kbuild-all@lists.01.org, linux-kernel@vger.kernel.org Subject: Re: drivers/mtd/tests/subpagetest.c:426:1: error: could not split insn Message-ID: <20201215154046.GA5262@1wt.eu> References: <202012152318.bHtYzSWJ-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <202012152318.bHtYzSWJ-lkp@intel.com> User-Agent: Mutt/1.6.1 (2016-04-27) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, On Tue, Dec 15, 2020 at 11:05:28PM +0800, kernel test robot wrote: > Hi Willy, > > FYI, the error/warning still remains. > > tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master > head: 148842c98a24e508aecb929718818fbf4c2a6ff3 > commit: 3744741adab6d9195551ce30e65e726c7a408421 random32: add noise from network and scheduling activity (...) not sure why I'm assigned this, but the root cause is a compiler bug: > drivers/mtd/tests/subpagetest.c: In function 'mtd_subpagetest_init': > >> drivers/mtd/tests/subpagetest.c:426:1: error: could not split insn > 426 | } > | ^ > (insn:TI 453 2652 455 (set (reg/v:SI 3 a3 [orig:304 a ] [304]) > (xor:SI (reg:SI 1 a1 [orig:717 net_rand_noise ] [717]) > (const:SI (plus:SI (symbol_ref:SI ("*.LANCHOR0") [flags 0x182]) > (const_int 12 [0xc]))))) "include/linux/prandom.h":66:4 152 {cskyv2_xorsi3} > (expr_list:REG_DEAD (reg:SI 1 a1 [orig:717 net_rand_noise ] [717]) > (nil))) > during RTL pass: final > drivers/mtd/tests/subpagetest.c:426:1: internal compiler error: in final_scan_insn_1, at final.c:3074 ^^^^^^^^^^^^^^^^^^^^^^^ > 0x510da0 _fatal_insn(char const*, rtx_def const*, char const*, int, char const*) > /tmp/build-crosstools-xh-9.3.0-2.34/gcc/gcc-9.3.0/gcc/rtl-error.c:108 > 0x503d22 final_scan_insn_1 > /tmp/build-crosstools-xh-9.3.0-2.34/gcc/gcc-9.3.0/gcc/final.c:3074 > 0x73f8bf final_scan_insn(rtx_insn*, _IO_FILE*, int, int, int*) > /tmp/build-crosstools-xh-9.3.0-2.34/gcc/gcc-9.3.0/gcc/final.c:3153 > 0x73fbac final_1 > /tmp/build-crosstools-xh-9.3.0-2.34/gcc/gcc-9.3.0/gcc/final.c:2021 > 0x740618 rest_of_handle_final > /tmp/build-crosstools-xh-9.3.0-2.34/gcc/gcc-9.3.0/gcc/final.c:4659 > 0x740618 execute > /tmp/build-crosstools-xh-9.3.0-2.34/gcc/gcc-9.3.0/gcc/final.c:4737 > Please submit a full bug report, > with preprocessed source if appropriate. > Please include the complete backtrace with any bug report. > See for instructions. ^^^^^^^^^^^^^^^^^^^^^^^^^ That's totally out of my scope. I suspect it might have broken a bisect operation. Regards, Willy