From patchwork Fri Jun 2 13:32:39 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Malcolm X-Patchwork-Id: 70510 Return-Path: X-Original-To: patchwork@sourceware.org Delivered-To: patchwork@sourceware.org Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 965323856968 for ; Fri, 2 Jun 2023 13:33:10 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 965323856968 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1685712790; bh=6/69N0c5zqdBHmF1o7n7FlCJGgcoIcPXFfz5LXj7zWA=; h=To:Cc:Subject:Date:List-Id:List-Unsubscribe:List-Archive: List-Post:List-Help:List-Subscribe:From:Reply-To:From; b=XvVP2ysns0LUuHEgQs7TuBuYdkj7HifsgoHrjZsOYMMkRcqmsKwek1mr+CI3exIjJ pwVDM8/YcgzknAru+WQlDBAk/nm7QFqRKELDpI2OzPicIH3wDpzPHFY6pmysqrerhu rhtqgTcgaJ0Q+367foWD8lEwFU3yYLpOJaSaWMVk= 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 [170.10.129.124]) by sourceware.org (Postfix) with ESMTPS id 43D3B3858D32 for ; Fri, 2 Jun 2023 13:32:43 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 43D3B3858D32 Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-569-vrysBP0ZN66lwNbwa1i9SA-1; Fri, 02 Jun 2023 09:32:41 -0400 X-MC-Unique: vrysBP0ZN66lwNbwa1i9SA-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.rdu2.redhat.com [10.11.54.1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 45B7C3855568 for ; Fri, 2 Jun 2023 13:32:41 +0000 (UTC) Received: from t14s.localdomain.com (unknown [10.22.34.14]) by smtp.corp.redhat.com (Postfix) with ESMTP id 2369640CFD01; Fri, 2 Jun 2023 13:32:41 +0000 (UTC) To: gcc-patches@gcc.gnu.org Cc: David Malcolm Subject: [pushed] analyzer: regions in different memory spaces can't alias Date: Fri, 2 Jun 2023 09:32:39 -0400 Message-Id: <20230602133239.66945-1-dmalcolm@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.1 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-Spam-Status: No, score=-11.8 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, RCVD_IN_DNSWL_NONE, 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: 2.1.29 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: David Malcolm via Gcc-patches From: David Malcolm Reply-To: David Malcolm Errors-To: gcc-patches-bounces+patchwork=sourceware.org@gcc.gnu.org Sender: "Gcc-patches" Successfully bootstrapped & regrtested on x86_64-pc-linux-gnu. Pushed to trunk as r14-1496-gb8a916726e7f4b. gcc/analyzer/ChangeLog: * store.cc (store::eval_alias_1): Regions in different memory spaces can't alias. --- gcc/analyzer/store.cc | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/gcc/analyzer/store.cc b/gcc/analyzer/store.cc index e8c927b9fe9..4d1de825e79 100644 --- a/gcc/analyzer/store.cc +++ b/gcc/analyzer/store.cc @@ -2710,6 +2710,18 @@ tristate store::eval_alias_1 (const region *base_reg_a, const region *base_reg_b) const { + /* If they're in different memory spaces, they can't alias. */ + { + enum memory_space memspace_a = base_reg_a->get_memory_space (); + if (memspace_a != MEMSPACE_UNKNOWN) + { + enum memory_space memspace_b = base_reg_b->get_memory_space (); + if (memspace_b != MEMSPACE_UNKNOWN + && memspace_a != memspace_b) + return tristate::TS_FALSE; + } + } + if (const symbolic_region *sym_reg_a = base_reg_a->dyn_cast_symbolic_region ()) {