From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-497311-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 91384 invoked by alias); 16 Sep 2015 07:56:06 -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 91296 invoked by uid 48); 16 Sep 2015 07:56:02 -0000
From: "development@faf-ltd.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/59812] Missing aggressive loop optimization warning
Date: Wed, 16 Sep 2015 07:56:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: middle-end
X-Bugzilla-Version: 4.9.0
X-Bugzilla-Keywords: diagnostic
X-Bugzilla-Severity: enhancement
X-Bugzilla-Who: development@faf-ltd.com
X-Bugzilla-Status: NEW
X-Bugzilla-Resolution:
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags:
X-Bugzilla-Changed-Fields: cc
Message-ID: <bug-59812-4-wVQX1Xb3GF@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-59812-4@http.gcc.gnu.org/bugzilla/>
References: <bug-59812-4@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: 2015-09/txt/msg01289.txt.bz2

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59812

Peter VARGA <development@faf-ltd.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |development@faf-ltd.com

--- Comment #4 from Peter VARGA <development@faf-ltd.com> ---
Good, but why does not produce this test case any warning:

#include <iostream>
#include <complex>
using namespace std;

int main() {
    complex<int> delta;
    complex<int> mc[4] = {0};

    for(int di = 0; di < 4; di++, delta = mc[di]) {
        cout << "di:" << di << " delta:" << delta << endl;
    }

    return 0;
}

it is an endless loop. According this threads
http://stackoverflow.com/questions/32506643/c-compilation-bug ,
http://blog.regehr.org/archives/918 I understand it was fixed.