From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-417562-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 31040 invoked by alias); 13 Mar 2013 06:46:59 -0000
Received: (qmail 30985 invoked by uid 48); 13 Mar 2013 06:46:42 -0000
From: "demiurg_spb at freemail dot ru" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/56263] [avr] Provide strict address-space checking
Date: Wed, 13 Mar 2013 06:46:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: target
X-Bugzilla-Keywords: diagnostic
X-Bugzilla-Severity: enhancement
X-Bugzilla-Who: demiurg_spb at freemail dot ru
X-Bugzilla-Status: ASSIGNED
X-Bugzilla-Priority: P5
X-Bugzilla-Assigned-To: gjl at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 4.8.0
X-Bugzilla-Changed-Fields:
Message-ID: <bug-56263-4-IneDrCibPW@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-56263-4@http.gcc.gnu.org/bugzilla/>
References: <bug-56263-4@http.gcc.gnu.org/bugzilla/>
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: <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
X-SW-Source: 2013-03/txt/msg01004.txt.bz2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56263

--- Comment #8 from demiurg_spb at freemail dot ru 2013-03-13 06:46:40 UTC ---
(In reply to comment #7)
> Sorry? I don't understand you last remark.  Are you saying it is trivial to
> implement in the avr backend?
>
No. Implementation is hard work.
I mean that if we take (typeof(lhs)==typeof(rhs)) axiom in initialization and
assignment: we have no logical problem at all.

> Before implementing it, you'll have to specify it.  What should do this code?
> 
> const __flash char* f (int i)
> {
>     const __flash char *p = "Hallo" + i;
>     return p;
> }

Yes it's not trivial... But it should be equal to next cases:

const __flash char* f (int i)
{
    const __flash char *p = "Hallo"; // flash str
    return &p[i];
}

const __flash char* f (int i)
{
    return "Hallo" + i;  // flash str
}

const __flash char* f (int i)
{
    return &"Hallo"[i];  // flash str
}