[Bug preprocessor/60014] Bad warning suppression caused by track-macro-expansion when not using integrated cpp

["manu at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60014

Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2014-06-10
                 CC|                            |dodji at gcc dot gnu.org,
                   |                            |manu at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #3 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
I can reproduce it in trunk using:

#pragma GCC system_header
#define FOO(a, b) __LINE__;

I think the problem is that there is a push of the system-header-ness flag on
the expansion of the macro, but there is no pop to restore
non-system-header-ness.

That is, we generate:

# 1 "test.c"
# 1 "<built-in>"
# 1 "<command-line>"
# 1 "test.c"
# 1 "test.h" 1

# 2 "test.h" 3
# 2 "test.c" 2

int main()
{

 6
# 5 "test.c" 3
  ;
        ;
  char* a = 1;
}

but we should generate:

# 1 "test.c"
# 1 "<built-in>"
# 1 "<command-line>"
# 1 "test.c"
# 1 "test.h" 1

# 2 "test.h" 3
# 2 "test.c" 2

int main()
{

 6
# 5 "test.c" 3
  ;
# 6 "test.c"
        ;
  char* a = 1;
}
>From gcc-bugs-return-453607-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 10 10:25:02 2014
Return-Path: <gcc-bugs-return-453607-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Delivered-To: listarch-gcc-bugs@gcc.gnu.org
Received: (qmail 16513 invoked by alias); 10 Jun 2014 10:25:02 -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
Delivered-To: mailing list gcc-bugs@gcc.gnu.org
Received: (qmail 16442 invoked by uid 48); 10 Jun 2014 10:24:55 -0000
From: "manu at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug preprocessor/60014] Bad warning suppression caused by track-macro-expansion when not using integrated cpp
Date: Tue, 10 Jun 2014 10:25:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: preprocessor
X-Bugzilla-Version: 4.8.2
X-Bugzilla-Keywords:
X-Bugzilla-Severity: normal
X-Bugzilla-Who: manu at gcc dot gnu.org
X-Bugzilla-Status: NEW
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:
Message-ID: <bug-60014-4-vlSPQzjvSL@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-60014-4@http.gcc.gnu.org/bugzilla/>
References: <bug-60014-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-SW-Source: 2014-06/txt/msg00689.txt.bz2
Content-length: 263

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60014

--- Comment #4 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
The meaning of the flags is given here:
https://gcc.gnu.org/onlinedocs/cpp/Preprocessor-Output.html#Preprocessor-Output
>From gcc-bugs-return-453608-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jun 10 10:30:22 2014
Return-Path: <gcc-bugs-return-453608-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Delivered-To: listarch-gcc-bugs@gcc.gnu.org
Received: (qmail 21260 invoked by alias); 10 Jun 2014 10:30:21 -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
Delivered-To: mailing list gcc-bugs@gcc.gnu.org
Received: (qmail 21196 invoked by uid 55); 10 Jun 2014 10:30:18 -0000
From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/57186] implement load sinking in loops
Date: Tue, 10 Jun 2014 10:30:00 -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: 4.9.0
X-Bugzilla-Keywords: missed-optimization
X-Bugzilla-Severity: enhancement
X-Bugzilla-Who: rguenth at gcc dot gnu.org
X-Bugzilla-Status: NEW
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:
Message-ID: <bug-57186-4-yy1RYrKcrT@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-57186-4@http.gcc.gnu.org/bugzilla/>
References: <bug-57186-4@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: 2014-06/txt/msg00690.txt.bz2
Content-length: 625

https://gcc.gnu.org/bugzilla/show_bug.cgi?idW186

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Jun 10 10:29:44 2014
New Revision: 211404

URL: http://gcc.gnu.org/viewcvs?rev!1404&root=gcc&view=rev
Log:
2014-06-10  Richard Biener  <rguenther@suse.de>

    PR tree-optimization/57186
    PR tree-optimization/59299
    * gcc.dg/tree-ssa/ssa-sink-11.c: New testcase.
    * gcc.dg/tree-ssa/ssa-sink-12.c: Likewise.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-sink-11.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-sink-12.c
Modified:
    trunk/gcc/testsuite/ChangeLog