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[23.128.96.18]) by mx.google.com with ESMTP id j4si9976926ejy.312.2020.05.26.07.09.20; Tue, 26 May 2020 07:09:44 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@redhat.com header.s=mimecast20190719 header.b=FjEYAfTh; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731822AbgEZOBp (ORCPT + 99 others); Tue, 26 May 2020 10:01:45 -0400 Received: from us-smtp-delivery-1.mimecast.com ([205.139.110.120]:20985 "EHLO us-smtp-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1729443AbgEZOBp (ORCPT ); Tue, 26 May 2020 10:01:45 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1590501704; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=hveuu+8b66hoKHpea4C8zYmfpzsl4PpKh2ng2WT4OsY=; b=FjEYAfTh0MOeIWcEV3uI83vNMbkiq5M4tWvuzKZuo5CDJRD1fd48mYb72tsY9zrsscJhe4 jCKWmVB/YEjwHOoa0GZpUFyoH9V/WbGeUmINVaKUBSSuUKFuAdjgraeTb/DDWx3+nB0Ba7 DRyohC2dWL5x0U9bgU8F/VABxyLXX10= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-388-ahoiBctAPFqCjy_Sue4xcw-1; Tue, 26 May 2020 10:01:37 -0400 X-MC-Unique: ahoiBctAPFqCjy_Sue4xcw-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id C5430460; Tue, 26 May 2020 14:01:16 +0000 (UTC) Received: from treble (ovpn-112-77.rdu2.redhat.com [10.10.112.77]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 8259B10013D2; Tue, 26 May 2020 14:01:15 +0000 (UTC) Date: Tue, 26 May 2020 09:01:13 -0500 From: Josh Poimboeuf To: Miroslav Benes Cc: Randy Dunlap , Stephen Rothwell , Linux Next Mailing List , Linux Kernel Mailing List , Peter Zijlstra Subject: Re: linux-next: Tree for May 21 (objtool warnings) Message-ID: <20200526140113.ppjywpx7uir3vrlj@treble> References: <20200522001209.07c19400@canb.auug.org.au> <22332d9b-5e9f-5474-adac-9b3e39861aee@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, May 25, 2020 at 01:07:27PM +0200, Miroslav Benes wrote: > > I'll try to find out which optimization does this, because it is a > > slightly different scenario than hiding __noreturn from the callees. > > Probably -fno-ipa-pure-const again. > > And it is indeed -fno-ipa-pure-const again. It still seems odd to me that GCC's dead end detection seems to break with -fno-ipa-pure-const. Do you know if these issues can be fixed on the GCC side? -- Josh