Message ID | ZeX7n7+lvs5TzGk4@tucnak |
---|---|
State | Unresolved |
Headers |
Return-Path: <gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org> Delivered-To: ouuuleilei@gmail.com Received: by 2002:a05:7301:fa17:b0:10a:f01:a869 with SMTP id ju23csp1544376dyc; Mon, 4 Mar 2024 08:50:22 -0800 (PST) X-Forwarded-Encrypted: i=3; AJvYcCUtq2vf8Mz0bnsY0vsjpOHp+4/yx6W+Cun8ZFSwi0sbDF15rvv8TEoPpZCAoR/8Hrg4ujXFIqub9JIth5Rknx1Mut0N5g== X-Google-Smtp-Source: AGHT+IHy8ZXlPpSN1rPcG/7UGfJs5VT25i9I/6/ixGg/IkUBUxN9oUuy6XfK4KTbS4yJ/QmvagPu X-Received: by 2002:a67:cb15:0:b0:470:712a:c26c with SMTP id b21-20020a67cb15000000b00470712ac26cmr5757394vsl.22.1709571021834; Mon, 04 Mar 2024 08:50:21 -0800 (PST) ARC-Seal: i=2; a=rsa-sha256; t=1709571021; cv=pass; d=google.com; s=arc-20160816; b=wRdWxCYdtkXd+nrn9WtFxkc6yCOhmeu/wjGOryDWy3rjb2My0wgzrdfXRYLFvC0V/T thjrW4JCWxfQV63OEmCyoO94VCaDwbOcvsomwg4XSMRrkpPg+42JuyY/uc/y3hZ9SjBz 5kaYSz/+qn9oc+5t03RQLbEPS+M34d2MAFvet3fHF/7mvF6wCWl1M4TOjjOYRPgZEvlT DEPuClEW5Rw4h7Z0Y0f6AQt/dZMJ5oB/+XxQePnIkilJIJcs/7q08nP0htZBTToGcxjj TiFbltbDx9OJMrbsG+guMbMsDg19VqM3ayWuZ+DQ1B8oN/v5YUBa5uGQEn0VNvUM66O3 I0Dg== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=errors-to:reply-to:list-subscribe:list-help:list-post:list-archive :list-unsubscribe:list-id:precedence:content-disposition:in-reply-to :mime-version:references:message-id:subject:cc:to:from:date :dkim-signature:arc-filter:dmarc-filter:delivered-to; bh=d9J858BHSZ2jj1IeQi75RTFll9KGv8uJh2BSZ1j0UBA=; fh=9hcr7/NTDfIi6xxV/xr0ZeRCyoXkNJOdqRt3VN7LVV0=; b=YgcW5szgCZMNslUNq2DvvltcePW4EPeJCn7+WyCC0gc/Fy/TEBOGdvB17iSvVl3OWa KrnU7t67M01mF7a46GP1mCo0pUp69YrvSh7QR4uNba0FWuPJamCL1uvZRiCnnvTD4WQO osUCkf9CX4AJvGJg5ac+bOardqJgpOq3W0g2m+rmREOJavwlckLxyGxkXqvqwnE/HFV6 d9VdVaxoh2dgLoh6shByHm9qOmRMsCw+Jaowh1GydRsFuurZ+9fQx3v5U6tlG2cIEZ5q /GZR0t+HUKZbCrtgx43wt3Pn/YV5/PhPXK3t97GBmmSktn9t0uFtDW3OLlGSbTiUeJu4 EO2Q==; dara=google.com ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@redhat.com header.s=mimecast20190719 header.b=GD0t2dj4; arc=pass (i=1); spf=pass (google.com: domain of gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org designates 2620:52:3:1:0:246e:9693:128c as permitted sender) smtp.mailfrom="gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com Received: from server2.sourceware.org (server2.sourceware.org. [2620:52:3:1:0:246e:9693:128c]) by mx.google.com with ESMTPS id f22-20020ab01016000000b007db47d4d14fsi264681uab.176.2024.03.04.08.50.21 for <ouuuleilei@gmail.com> (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 04 Mar 2024 08:50:21 -0800 (PST) Received-SPF: pass (google.com: domain of gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org designates 2620:52:3:1:0:246e:9693:128c as permitted sender) client-ip=2620:52:3:1:0:246e:9693:128c; Authentication-Results: mx.google.com; dkim=pass header.i=@redhat.com header.s=mimecast20190719 header.b=GD0t2dj4; arc=pass (i=1); spf=pass (google.com: domain of gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org designates 2620:52:3:1:0:246e:9693:128c as permitted sender) smtp.mailfrom="gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 6E3C53858C56 for <ouuuleilei@gmail.com>; Mon, 4 Mar 2024 16:50:21 +0000 (GMT) X-Original-To: gcc-patches@gcc.gnu.org Delivered-To: gcc-patches@gcc.gnu.org Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by sourceware.org (Postfix) with ESMTPS id E4B003858C5E for <gcc-patches@gcc.gnu.org>; Mon, 4 Mar 2024 16:49:42 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org E4B003858C5E Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=redhat.com ARC-Filter: OpenARC Filter v1.0.0 sourceware.org E4B003858C5E Authentication-Results: server2.sourceware.org; arc=none smtp.remote-ip=170.10.133.124 ARC-Seal: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1709570984; cv=none; b=fX7X67PEJjUggBN1aGo7VatwlsUGJVjAyqyFkCiIZWKbWkjIds2ZSX78bwWuYqjTQth5GnfPfpEzm9wjqwaxWMhk08/cmitml2RdKfaq38Xfi3qa09+iiWtBPQvscKX0/3f1G+ng50KXBf72dcC3f1ch6QYOQkr3Oh/U8bVgYdo= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1709570984; c=relaxed/simple; bh=cSbGDH+EqaD7gTLPnaKSHYs52lFNRsJInL8iPCWH09s=; h=DKIM-Signature:Date:From:To:Subject:Message-ID:MIME-Version; b=o0hK4/1S9uX8H4v8kJz6hwBWITWdKHrNQ/M3HM+3HqXPlak12fFM7PFHXAcnaHTqhIzdtkTbquyvYgOxT0IhJXlXcpMH4pVKh59nr7yV3+YVneiHdtK8put0wy2MOsa4kKU3XT8sCj73sMLQbBpNlTLxAwbzVEqAF5kqIoZGGNI= ARC-Authentication-Results: i=1; server2.sourceware.org DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1709570982; h=from:from:reply-to: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=d9J858BHSZ2jj1IeQi75RTFll9KGv8uJh2BSZ1j0UBA=; b=GD0t2dj4lTrlEni3pmq/hvzFYe/HY8NAtJZDMGXr78HKdkZVOini4J/Qhk/0xIFPvSSY+C 082W8a2WpF27tJweKpQa7X4L5EI0pgKneaNA5tIyg8x/iTCfipHfFEvrveP0v2JZPLssFU 0WPh0HHxrlWw2wNJ3nQ0EokkmClM5CM= Received: from mimecast-mx02.redhat.com (mx-ext.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-118-6UcGRYmbMKyp4hhqzHlQYw-1; Mon, 04 Mar 2024 11:49:39 -0500 X-MC-Unique: 6UcGRYmbMKyp4hhqzHlQYw-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id CB1A23811F30; Mon, 4 Mar 2024 16:49:38 +0000 (UTC) Received: from tucnak.zalov.cz (unknown [10.45.226.25]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 5C1852166B31; Mon, 4 Mar 2024 16:49:38 +0000 (UTC) Received: from tucnak.zalov.cz (localhost [127.0.0.1]) by tucnak.zalov.cz (8.17.1/8.17.1) with ESMTPS id 424Gnaj91800486 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Mon, 4 Mar 2024 17:49:36 +0100 Received: (from jakub@localhost) by tucnak.zalov.cz (8.17.1/8.17.1/Submit) id 424GnZHj1800485; Mon, 4 Mar 2024 17:49:35 +0100 Date: Mon, 4 Mar 2024 17:49:35 +0100 From: Jakub Jelinek <jakub@redhat.com> To: Jeff Law <jeffreyalaw@gmail.com>, Rainer Orth <ro@cebitec.uni-bielefeld.de> Cc: Greg McGary <gkm@rivosinc.com>, gcc-patches@gcc.gnu.org Subject: [PATCH] combine: Fix recent WORD_REGISTER_OPERATIONS check [PR113010] Message-ID: <ZeX7n7+lvs5TzGk4@tucnak> References: <20240227001736.3690294-1-gkm@rivosinc.com> <4a986781-7be8-4e45-a2d7-567d1df58ee3@gmail.com> <yddy1ayas2o.fsf@CeBiTec.Uni-Bielefeld.DE> MIME-Version: 1.0 In-Reply-To: <yddy1ayas2o.fsf@CeBiTec.Uni-Bielefeld.DE> X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.6 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-Spam-Status: No, score=-3.9 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H4, RCVD_IN_MSPIKE_WL, SPF_HELO_NONE, SPF_NONE, TXREP, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Gcc-patches mailing list <gcc-patches.gcc.gnu.org> List-Unsubscribe: <https://gcc.gnu.org/mailman/options/gcc-patches>, <mailto:gcc-patches-request@gcc.gnu.org?subject=unsubscribe> List-Archive: <https://gcc.gnu.org/pipermail/gcc-patches/> List-Post: <mailto:gcc-patches@gcc.gnu.org> List-Help: <mailto:gcc-patches-request@gcc.gnu.org?subject=help> List-Subscribe: <https://gcc.gnu.org/mailman/listinfo/gcc-patches>, <mailto:gcc-patches-request@gcc.gnu.org?subject=subscribe> Reply-To: Jakub Jelinek <jakub@redhat.com> Errors-To: gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1792615143435841070 X-GMAIL-MSGID: 1792615143435841070 |
Series |
combine: Fix recent WORD_REGISTER_OPERATIONS check [PR113010]
|
|
Checks
Context | Check | Description |
---|---|---|
snail/gcc-patch-check | warning | Git am fail log |
Commit Message
Jakub Jelinek
March 4, 2024, 4:49 p.m. UTC
On Mon, Mar 04, 2024 at 05:18:39PM +0100, Rainer Orth wrote: > > On 2/26/24 17:17, Greg McGary wrote: > >> The sign-bit-copies of a sign-extending load cannot be known until runtime on > >> WORD_REGISTER_OPERATIONS targets, except in the case of a zero-extending MEM > >> load. See the fix for PR112758. > >> 2024-02-22 Greg McGary <gkm@rivosinc.com> > >> PR rtl-optimization/113010 > >> * combine.cc (simplify_comparison): Simplify a SUBREG on > >> WORD_REGISTER_OPERATIONS targets only if it is a zero-extending > >> MEM load. > >> * gcc.c-torture/execute/pr113010.c: New test. > > I think this is fine for the trunk. I'll do some final testing on it > > tomorrow. > > unfortunately, the patch broke Solaris/SPARC bootstrap > (sparc-sun-solaris2.11): > > /vol/gcc/src/hg/master/local/gcc/combine.cc: In function 'rtx_code simplify_comparison(rtx_code, rtx_def**, rtx_def**)': > /vol/gcc/src/hg/master/local/gcc/combine.cc:12101:25: error: '*(unsigned int*)((char*)&inner_mode + offsetof(scalar_int_mode, scalar_int_mode::m_mode))' may be used uninitialized [-Werror=maybe-uninitialized] > 12101 | scalar_int_mode mode, inner_mode, tmode; > | ^~~~~~~~~~ I don't see how it could ever work properly, inner_mode in that spot is just uninitialized. I think we shouldn't worry about paradoxical subregs of non-scalar_int_mode REGs/MEMs and for the scalar_int_mode ones should initialize inner_mode before we use it. Another option would be to use maybe_lt (GET_MODE_PRECISION (GET_MODE (SUBREG_REG (op0))), BITS_PER_WORD) and load_extend_op (GET_MODE (SUBREG_REG (op0))) == ZERO_EXTEND, or set machine_mode smode = GET_MODE (SUBREG_REG (op0)); and use it in those two spots. 2024-03-04 Jakub Jelinek <jakub@redhat.com> PR rtl-optimization/113010 * combine.cc (simplify_comparison): Guard the WORD_REGISTER_OPERATIONS check on scalar_int_mode of SUBREG_REG and initialize inner_mode. Jakub
--- gcc/combine.cc.jj 2024-03-04 10:01:21.054937316 +0100 +++ gcc/combine.cc 2024-03-04 17:40:51.556052647 +0100 @@ -12554,6 +12554,8 @@ simplify_comparison (enum rtx_code code, if (paradoxical_subreg_p (op0)) { if (WORD_REGISTER_OPERATIONS + && is_a <scalar_int_mode> (GET_MODE (SUBREG_REG (op0)), + &inner_mode) && GET_MODE_PRECISION (inner_mode) < BITS_PER_WORD /* On WORD_REGISTER_OPERATIONS targets the bits beyond sub_mode aren't considered undefined,