From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 30476 invoked by alias); 23 Oct 2011 16:06:57 -0000 Received: (qmail 30458 invoked by uid 22791); 23 Oct 2011 16:06:54 -0000 X-SWARE-Spam-Status: No, hits=-2.8 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00,TW_TM X-Spam-Check-By: sourceware.org Received: from localhost (HELO gcc.gnu.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Sun, 23 Oct 2011 16:06:40 +0000 From: "vries at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/50763] [4.7 Regression] ICE: verify_gimple failed: missing PHI def with -ftree-tail-merge Date: Sun, 23 Oct 2011 16:06:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: tree-optimization X-Bugzilla-Keywords: ice-on-valid-code X-Bugzilla-Severity: normal X-Bugzilla-Who: vries at gcc dot gnu.org X-Bugzilla-Status: ASSIGNED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: vries at gcc dot gnu.org X-Bugzilla-Target-Milestone: 4.7.0 X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org X-SW-Source: 2011-10/txt/msg02380.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50763 --- Comment #7 from vries at gcc dot gnu.org 2011-10-23 16:06:38 UTC --- Author: vries Date: Sun Oct 23 16:06:32 2011 New Revision: 180341 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=180341 Log: 2011-10-23 Tom de Vries PR tree-optimization/50763 * tree-ssa-tail-merge.c (same_succ_flush_bb): New function, factored out of ... (same_succ_flush_bbs): Use same_succ_flush_bb. (purge_bbs): Remove argument. Remove calls to same_succ_flush_bbs, release_last_vdef and delete_basic_block. (unlink_virtual_phi): New function. (update_vuses): Add and use vuse1_phi_args argument. Set var to SSA_NAME_VAR of vuse1 or vuse2, and use var. Handle case that def_stmt2 is NULL. Use phi result as phi arg in case vuse1 or vuse2 is NULL_TREE. Replace uses of vuse1 if vuse2 is NULL_TREE. Fix code to limit replacement of uses. Propagate phi argument for phis with a single argument. (replace_block_by): Update vops if phi_vuse1 or phi_vuse2 is NULL_TREE. Set vuse1_phi_args if vuse1 is a phi defined in bb1. Add vuse1_phi_args as argument to call to update_vuses. Call release_last_vdef, same_succ_flush_bb, delete_basic_block. Update CDI_DOMINATORS info. (tail_merge_optimize): Remove argument in call to purge_bbs. Remove call to free_dominance_info. Only call calculate_dominance_info once. Modified: trunk/gcc/ChangeLog trunk/gcc/tree-ssa-tail-merge.c