Message ID | 20240201141930.117783858297@sourceware.org |
---|---|
State | Accepted |
Headers |
Return-Path: <gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org> Delivered-To: ouuuleilei@gmail.com Received: by 2002:a05:7301:2719:b0:106:209c:c626 with SMTP id hl25csp184153dyb; Thu, 1 Feb 2024 06:19:30 -0800 (PST) X-Google-Smtp-Source: AGHT+IFxtGUyEOPhAZamnZDFSCFecLLnE5Rhp6rOvBna7rDHOiRID5NfOJAmf3I09mGptcMa3wUh X-Received: by 2002:a05:6808:110:b0:3be:494e:9379 with SMTP id b16-20020a056808011000b003be494e9379mr4593448oie.16.1706797170509; Thu, 01 Feb 2024 06:19:30 -0800 (PST) ARC-Seal: i=2; a=rsa-sha256; t=1706797170; cv=pass; d=google.com; s=arc-20160816; b=0rgQv8pSLQuX5TPz5wlat8hRiPHyp4Z6v6YkeDsKuSNDNvxyys/WHMTOCUyE9CxdTs 9whsyINKFSNMQNEIRG4M1A8rsYyNUdw7IdTgx4TiHNMp8F/swz8KQfUUcp58NWlPOTYE PXCL2MFV7el7qvqWsLg/H7M2kLejO8tOkAQT9xcms/pCoetfnZko1hzfH8Mw87ULQ+LX eBrSCsKmUW1ylKNuvKL29OgYMZgNlOuWBLvpPJrNBUuzhlfAsKkHd1JXWh5v22F/ZY1a 46/zU+sgqyvaOiwFRcNgnwwsHHfe9TAgfSXwBHfTG/t5+89dUPrEF9LJqySesYlzdzyp o16w== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=message-id:errors-to:list-subscribe:list-help:list-post :list-archive:list-unsubscribe:list-id:precedence:mime-version :subject:cc:to:from:date:dkim-signature:dkim-signature :dkim-signature:dkim-signature:arc-filter:dmarc-filter:delivered-to; bh=s8vGST2FpTTvxKV+V5pAn1OVbPIfFOJ+XQSJyQDL058=; fh=mFznLs+JsQJobJNDQ00B6ELd3Lfy36sb9f+H/CHq6is=; b=xiFSw+krIy0w08C7K6oM5Jd8hBT/wgNxpTS1kPr8wVL1CLkFGkQeMWnAGp0OjhuzrS J3yz0N/sR0pzIt6Wwqtq7qtwjDUA3LGkSUKVu1YMqNFfF9kBMlbyUj741ZCQF3MLuJlj 8p/QQvbRQsl+xprbeEK/C6avZlJtZQFBVjjMCb36a+e4x9e2E/zNyuPumKSSuMf7iUJp GpwmsEeconzIpLYYFf7skFfyA3BME7oIO6KBB8Kjx6/LforpQ1fXCbkqEJYb27mSoAjP t2qfeV6yulxRFmxDc53ui7V639YMk6Gna2c6Kpnqb57pjii4kDZYVRcMOkJEBBJgL+TB z18w==; dara=google.com ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@suse.de header.s=susede2_rsa header.b=It0qnBDP; dkim=neutral (no key) header.i=@suse.de; dkim=pass header.i=@suse.de header.s=susede2_rsa header.b=It0qnBDP; dkim=neutral (no key) header.i=@suse.de header.s=susede2_ed25519; arc=pass (i=1); spf=pass (google.com: domain of gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org designates 8.43.85.97 as permitted sender) smtp.mailfrom="gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=suse.de X-Forwarded-Encrypted: i=1; AJvYcCXwXe6zXcJjHzGPvfj3JuXPCh4iLJfsXupmaPcEmyPqtON7+nFzM+Do3dshLdHWe5liRF+WYADjP2F0EG2lUqLMTbX0VA== Received: from server2.sourceware.org (server2.sourceware.org. [8.43.85.97]) by mx.google.com with ESMTPS id j6-20020ae9c206000000b007839a123f18si13695913qkg.269.2024.02.01.06.19.30 for <ouuuleilei@gmail.com> (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 01 Feb 2024 06:19:30 -0800 (PST) Received-SPF: pass (google.com: domain of gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org designates 8.43.85.97 as permitted sender) client-ip=8.43.85.97; Authentication-Results: mx.google.com; dkim=pass header.i=@suse.de header.s=susede2_rsa header.b=It0qnBDP; dkim=neutral (no key) header.i=@suse.de; dkim=pass header.i=@suse.de header.s=susede2_rsa header.b=It0qnBDP; dkim=neutral (no key) header.i=@suse.de header.s=susede2_ed25519; arc=pass (i=1); spf=pass (google.com: domain of gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org designates 8.43.85.97 as permitted sender) smtp.mailfrom="gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=suse.de Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 117783858297 for <ouuuleilei@gmail.com>; Thu, 1 Feb 2024 14:19:30 +0000 (GMT) X-Original-To: gcc-patches@gcc.gnu.org Delivered-To: gcc-patches@gcc.gnu.org Received: from smtp-out2.suse.de (smtp-out2.suse.de [IPv6:2a07:de40:b251:101:10:150:64:2]) by sourceware.org (Postfix) with ESMTPS id B170B3858429 for <gcc-patches@gcc.gnu.org>; Thu, 1 Feb 2024 14:18:26 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org B170B3858429 Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=suse.de Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=suse.de ARC-Filter: OpenARC Filter v1.0.0 sourceware.org B170B3858429 Authentication-Results: server2.sourceware.org; arc=none smtp.remote-ip=2a07:de40:b251:101:10:150:64:2 ARC-Seal: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1706797110; cv=none; b=TQQhXC7bXBP5ygY/uwvVkDJwY+8GwaWpz/ZoXwwoLDlnkKzW4RDtBU/t8J6UobYQteHCIFf4mu/VYbjhSUi8HIra+qa6GMpCCeI6H9axIM7sVEbDswZw7YYqO5SdhJVzDU9mI17/id3T7TQoqGPLNFeBiyeC0N5KJkyLUJGvV6k= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1706797110; c=relaxed/simple; bh=D/KXVYUgPV1wrm2qaasie3blXsDERWVBeoQ8HKcjoz4=; h=DKIM-Signature:DKIM-Signature:DKIM-Signature:DKIM-Signature:Date: From:To:Subject:MIME-Version; b=U1wzVPeWc/aZLmbZfkeceBh0+G7VD+tQhcDA998HUC2sQrWRn6yV46C8gIPLaV2mmvDu7fUuhMnNz4Yi6QcDDIrav3L+IkIHgx3YyK29PKLqYnUqQorZ20UTJ6QkDXrk2n10ZthAfHEFCRSE9xCdoFDjGVvz1YUlXlkIsiXHtlI= ARC-Authentication-Results: i=1; server2.sourceware.org Received: from [10.168.4.150] (unknown [10.168.4.150]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id C21EA1FBB3; Thu, 1 Feb 2024 14:18:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1706797105; h=from:from:reply-to:date:date:to:to:cc:cc:mime-version:mime-version: content-type:content-type; bh=s8vGST2FpTTvxKV+V5pAn1OVbPIfFOJ+XQSJyQDL058=; b=It0qnBDPQtGax7oony5xgH0YatsXgWNs/O5S+44x2OPY47WDAp9xGGG4HimLgoinrq3I9o HtEfPn4YWc5p0FeahEYZlONH3+QoYJKmbF3DAMK7SejZwY86+Cyx6duQL1KbkT2OAk7obY CGxmy9kjEOVRe9M43lY1or/jpumF3Mc= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1706797105; h=from:from:reply-to:date:date:to:to:cc:cc:mime-version:mime-version: content-type:content-type; bh=s8vGST2FpTTvxKV+V5pAn1OVbPIfFOJ+XQSJyQDL058=; b=1Kk6iy9kdX+a06O9XSVpPYx+ySI131nKEEfWnkCjboWE4eFDLNX+OhxizlR1L1FvEudJq9 u+AQXcaZZ8Btf8BA== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1706797105; h=from:from:reply-to:date:date:to:to:cc:cc:mime-version:mime-version: content-type:content-type; bh=s8vGST2FpTTvxKV+V5pAn1OVbPIfFOJ+XQSJyQDL058=; b=It0qnBDPQtGax7oony5xgH0YatsXgWNs/O5S+44x2OPY47WDAp9xGGG4HimLgoinrq3I9o HtEfPn4YWc5p0FeahEYZlONH3+QoYJKmbF3DAMK7SejZwY86+Cyx6duQL1KbkT2OAk7obY CGxmy9kjEOVRe9M43lY1or/jpumF3Mc= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1706797105; h=from:from:reply-to:date:date:to:to:cc:cc:mime-version:mime-version: content-type:content-type; bh=s8vGST2FpTTvxKV+V5pAn1OVbPIfFOJ+XQSJyQDL058=; b=1Kk6iy9kdX+a06O9XSVpPYx+ySI131nKEEfWnkCjboWE4eFDLNX+OhxizlR1L1FvEudJq9 u+AQXcaZZ8Btf8BA== Date: Thu, 1 Feb 2024 15:18:21 +0100 (CET) From: Richard Biener <rguenther@suse.de> To: gcc-patches@gcc.gnu.org cc: ubizjak@gmail.com Subject: [PATCH 1/2] target/113255 - avoid REG_POINTER on a pointer difference MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Authentication-Results: smtp-out2.suse.de; none X-Spam-Level: X-Spam-Score: -0.75 X-Spamd-Result: default: False [-0.75 / 50.00]; ARC_NA(0.00)[]; FROM_HAS_DN(0.00)[]; FREEMAIL_ENVRCPT(0.00)[gmail.com]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[text/plain]; TO_DN_NONE(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; MISSING_MID(2.50)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; NEURAL_HAM_SHORT(-0.20)[-0.998]; RCPT_COUNT_TWO(0.00)[2]; FUZZY_BLOCKED(0.00)[rspamd.com]; RCVD_COUNT_ZERO(0.00)[0]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; FREEMAIL_CC(0.00)[gmail.com]; BAYES_HAM(-1.96)[94.79%] X-Spam-Status: No, score=-10.7 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, MISSING_MID, SPF_HELO_NONE, SPF_PASS, 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> Errors-To: gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org Message-Id: <20240201141930.117783858297@sourceware.org> X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1789706549570442801 X-GMAIL-MSGID: 1789706549570442801 |
Series |
[1/2] target/113255 - avoid REG_POINTER on a pointer difference
|
|
Checks
Context | Check | Description |
---|---|---|
snail/gcc-patch-check | success | Github commit url |
Commit Message
Richard Biener
Feb. 1, 2024, 2:18 p.m. UTC
The following avoids re-using a register holding a pointer (and thus might be REG_POINTER) for the result of a pointer difference computation. That might confuse heuristics in (broken) RTL alias analysis which relies on REG_POINTER indicating that we're dealing with one. This alone doesn't fix anything. Bootstrapped and tested on x86_64-unknown-linux-gnu, OK for trunk and branches (as necessary)? Thanks, Richard. PR target/113255 * config/i386/i386-expand.cc (expand_set_or_cpymem_prologue_epilogue_by_misaligned_moves): Use a new pseudo for the skipped number of bytes. --- gcc/config/i386/i386-expand.cc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/gcc/config/i386/i386-expand.cc b/gcc/config/i386/i386-expand.cc index 0d817fc3f3b..26c48e8b0c8 100644 --- a/gcc/config/i386/i386-expand.cc +++ b/gcc/config/i386/i386-expand.cc @@ -8090,7 +8090,7 @@ expand_set_or_cpymem_prologue_epilogue_by_misaligned_moves (rtx destmem, rtx src /* See how many bytes we skipped. */ saveddest = expand_simple_binop (GET_MODE (*destptr), MINUS, saveddest, *destptr, - saveddest, 1, OPTAB_DIRECT); + NULL_RTX, 1, OPTAB_DIRECT); /* Adjust srcptr and count. */ if (!issetmem) *srcptr = expand_simple_binop (GET_MODE (*srcptr), MINUS, *srcptr,