From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-477788-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 8608 invoked by alias); 19 Feb 2015 14:14:08 -0000
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
Received: (qmail 8157 invoked by uid 55); 19 Feb 2015 14:14:01 -0000
From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/64277] [4.9 Regression] Incorrect warning "array subscript is above array bounds"
Date: Thu, 19 Feb 2015 14:14:00 -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-Version: 4.9.3
X-Bugzilla-Keywords: diagnostic
X-Bugzilla-Severity: normal
X-Bugzilla-Who: rguenth at gcc dot gnu.org
X-Bugzilla-Status: ASSIGNED
X-Bugzilla-Priority: P2
X-Bugzilla-Assigned-To: rguenth at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 4.9.3
X-Bugzilla-Flags:
X-Bugzilla-Changed-Fields:
Message-ID: <bug-64277-4-J0HRFKjAkr@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-64277-4@http.gcc.gnu.org/bugzilla/>
References: <bug-64277-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 7bit
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-SW-Source: 2015-02/txt/msg02122.txt.bz2

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64277

--- Comment #20 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Feb 19 14:13:16 2015
New Revision: 220815

URL: https://gcc.gnu.org/viewcvs?rev=220815&root=gcc&view=rev
Log:
2015-02-19  Richard Biener  <rguenther@suse.de>

    Backport from mainline
    2014-12-09  Richard Biener  <rguenther@suse.de>

    PR middle-end/64199
    * fold-const.c (fold_binary_loc): Use TREE_OVERFLOW_P.

    * gcc.dg/torture/pr64199.c: New testcase.

    2015-01-14  Richard Biener  <rguenther@suse.de>

    PR tree-optimization/64493
    PR tree-optimization/64495
    * tree-vect-loop.c (vect_finalize_reduction): For double-reductions
    assign the proper vectorized PHI to the inner loop exit PHIs.

    * gcc.dg/vect/pr64493.c: New testcase.
    * gcc.dg/vect/pr64495.c: Likewise.

    2015-01-27  Richard Biener  <rguenther@suse.de>

    PR tree-optimization/56273
    PR tree-optimization/59124
    PR tree-optimization/64277
    * tree-vrp.c (vrp_finalize): Emit array-bound warnings only
    from the first VRP pass.

    * g++.dg/warn/Warray-bounds-6.C: New testcase.
    * gcc.dg/Warray-bounds-12.c: Likewise.
    * gcc.dg/Warray-bounds-13.c: Likewise.

    2015-02-19  Richard Biener  <rguenther@suse.de>

    Backport from mainline
    2015-01-15  Richard Biener  <rguenther@suse.de>

    PR middle-end/64365
    * tree-data-ref.c (dr_analyze_indices): Make sure that accesses
    for MEM_REF access functions with the same base can never partially
    overlap.

    * gcc.dg/torture/pr64365.c: New testcase.

Added:
    branches/gcc-4_9-branch/gcc/testsuite/g++.dg/warn/Warray-bounds-6.C
    branches/gcc-4_9-branch/gcc/testsuite/gcc.dg/Warray-bounds-12.c
    branches/gcc-4_9-branch/gcc/testsuite/gcc.dg/Warray-bounds-13.c
    branches/gcc-4_9-branch/gcc/testsuite/gcc.dg/torture/pr64199.c
    branches/gcc-4_9-branch/gcc/testsuite/gcc.dg/torture/pr64365.c
    branches/gcc-4_9-branch/gcc/testsuite/gcc.dg/vect/pr64493.c
    branches/gcc-4_9-branch/gcc/testsuite/gcc.dg/vect/pr64495.c
Modified:
    branches/gcc-4_9-branch/gcc/ChangeLog
    branches/gcc-4_9-branch/gcc/fold-const.c
    branches/gcc-4_9-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_9-branch/gcc/tree-data-ref.c
    branches/gcc-4_9-branch/gcc/tree-vect-loop.c
    branches/gcc-4_9-branch/gcc/tree-vrp.c