From patchwork Mon Oct 17 12:41:03 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Biener X-Patchwork-Id: 682898 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from sourceware.org (server1.sourceware.org [209.132.180.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3syHrW12ZWz9sDG for ; Mon, 17 Oct 2016 23:41:30 +1100 (AEDT) Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=gcc.gnu.org header.i=@gcc.gnu.org header.b=mi9ayCvo; dkim-atps=neutral DomainKey-Signature: a=rsa-sha1; c=nofws; d=gcc.gnu.org; h=list-id :list-unsubscribe:list-archive:list-post:list-help:sender:date :from:to:subject:message-id:mime-version:content-type; q=dns; s= default; b=LVaQAdZ2wfskKDrnsWR0g00mTx38J1e4ATHFnKWMZUbw8ZJw2D6CO GXMJkmXtXJ+eGgF0OHuYfZzLgwj8eIDkD7H5oPVrOUBHCcStWyvG8NSu1G7egeLc HD0YoOxGhM9JlaKJFlAGSJUw7m+5O0BrHAJhDm5JyVhdQtvEn3n/co= DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=gcc.gnu.org; h=list-id :list-unsubscribe:list-archive:list-post:list-help:sender:date :from:to:subject:message-id:mime-version:content-type; s= default; bh=hWsw4fu7DEDHTaAWlZFm8GGtwNo=; b=mi9ayCvoooI83efFk3Y4 nUNUVDK7woRDWh7BAXzWnYP+UmxyB+2sK4qQ95Up/kdkpw/YzpQWpwVDAeGNqCc8 2+VWTa7BOgSkRTm6cmxSJaGdrc+3XYMoBda8dl/Xzzu44jd9JlzXJ8+7XVblzaQf JJcKiX7mLTQJJ1rG1pbDXHk= Received: (qmail 77938 invoked by alias); 17 Oct 2016 12:41:16 -0000 Mailing-List: contact gcc-patches-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Archive: List-Post: List-Help: Sender: gcc-patches-owner@gcc.gnu.org Delivered-To: mailing list gcc-patches@gcc.gnu.org Received: (qmail 77928 invoked by uid 89); 17 Oct 2016 12:41:16 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-1.4 required=5.0 tests=BAYES_00, KAM_ASCII_DIVIDERS, RP_MATCHES_RCVD, SPF_PASS autolearn=no version=3.3.2 spammy=Hx-languages-length:1786 X-HELO: mx2.suse.de Received: from mx2.suse.de (HELO mx2.suse.de) (195.135.220.15) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Mon, 17 Oct 2016 12:41:05 +0000 Received: from relay2.suse.de (charybdis-ext.suse.de [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id E6EE5ABC8 for ; Mon, 17 Oct 2016 12:41:03 +0000 (UTC) Date: Mon, 17 Oct 2016 14:41:03 +0200 (CEST) From: Richard Biener To: gcc-patches@gcc.gnu.org Subject: [PATCH] Fix PR77988 Message-ID: User-Agent: Alpine 2.11 (LSU 23 2013-08-11) MIME-Version: 1.0 Bootstrapped on x86_64-unknown-linux-gnu, testing in progress. Richard. 2016-10-17 Richard Biener PR tree-optimization/77988 * tree-vrp.c (remove_range_assertions): Use replace_uses_by. * gcc.dg/torture/pr77988.c: New testcase. Index: gcc/testsuite/gcc.dg/torture/pr77988.c =================================================================== --- gcc/testsuite/gcc.dg/torture/pr77988.c (revision 0) +++ gcc/testsuite/gcc.dg/torture/pr77988.c (working copy) @@ -0,0 +1,24 @@ +/* { dg-do compile } */ + +static int a = 2; +int b[1], c, d; + +int main () +{ + int e = a, *f = &b[0]; + if (d) + for (e = 0; e < 1; e++) + ; + if (e) + { +L1: + if (b < f) + __builtin_abort (); + if (*f) + c++; + return 0; + } + f = 0; + goto L1; + return 0; +} Index: gcc/tree-vrp.c =================================================================== --- gcc/tree-vrp.c (revision 241227) +++ gcc/tree-vrp.c (working copy) @@ -6882,7 +6882,6 @@ remove_range_assertions (void) for (si = gsi_after_labels (bb), is_unreachable = -1; !gsi_end_p (si);) { gimple *stmt = gsi_stmt (si); - gimple *use_stmt; if (is_gimple_assign (stmt) && gimple_assign_rhs_code (stmt) == ASSERT_EXPR) @@ -6890,8 +6889,6 @@ remove_range_assertions (void) tree lhs = gimple_assign_lhs (stmt); tree rhs = gimple_assign_rhs1 (stmt); tree var; - use_operand_p use_p; - imm_use_iterator iter; var = ASSERT_EXPR_VAR (rhs); @@ -6927,12 +6924,7 @@ remove_range_assertions (void) } /* Propagate the RHS into every use of the LHS. */ - FOR_EACH_IMM_USE_STMT (use_stmt, iter, lhs) - { - FOR_EACH_IMM_USE_ON_STMT (use_p, iter) - SET_USE (use_p, var); - update_stmt (use_stmt); - } + replace_uses_by (lhs, var); /* And finally, remove the copy, it is not needed. */ gsi_remove (&si, true);