From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-prs-return-29332-listarch-gcc-prs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 17912 invoked by alias); 13 Feb 2003 15:36:01 -0000
Mailing-List: contact gcc-prs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Archive: <http://gcc.gnu.org/ml/gcc-prs/>
List-Post: <mailto:gcc-prs@gcc.gnu.org>
List-Help: <mailto:gcc-prs-help@gcc.gnu.org>
Sender: gcc-prs-owner@gcc.gnu.org
Received: (qmail 17887 invoked by uid 71); 13 Feb 2003 15:36:00 -0000
Date: Thu, 13 Feb 2003 15:36:00 -0000
Message-ID: <20030213153600.17885.qmail@sources.redhat.com>
To: nobody@gcc.gnu.org
Cc: gcc-prs@gcc.gnu.org,
From: Steven Bosscher <s.bosscher@student.tudelft.nl>
Subject: Re: optimization/7189: gcc -O2 -Wall does not print ``control
	reaches end of non-void function'' warning
Reply-To: Steven Bosscher <s.bosscher@student.tudelft.nl>
X-SW-Source: 2003-02/txt/msg00569.txt.bz2
List-Id: <gcc-prs.sourceware.org>

The following reply was made to PR optimization/7189; it has been noted by GNATS.

From: Steven Bosscher <s.bosscher@student.tudelft.nl>
To: gcc-gnats@gcc.gnu.org, am99173@konami.com, gcc-bugs@gcc.gnu.org,
	nobody@gcc.gnu.org
Cc:  
Subject: Re: optimization/7189: gcc -O2 -Wall does not print ``control
	reaches end of non-void function'' warning
Date: 13 Feb 2003 16:33:14 +0100

 http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=7189
 
 This is a sibling call optimization bug.
 
 Without any optimization (gcc -c -Wall), the warning is issued
 as it should be.  When sibling calls are optimized
 (gcc -c -Wall -foptimize-sibling-calls), the warning disappears.
 
 # cat c7129.c
 extern void foo(void);
 int bar(void) { foo(); }
 
 # gcc-3.4 -v
 Reading specs from
 /opt/experimental/lib/gcc-lib/i586-pc-linux-gnu/3.4/specs
 Configured with: ../gcc-trunk/configure --disable-nls --with-gnu-as
 --with-gnu-ld --prefix=/opt/experimental --program-suffix=-3.5
 --enable-languages=c,c++
 Thread model: posix
 gcc version 3.4 20030213 (experimental)
 # gcc-3.4 -c -Wall c7189.c                            
 c7189.c: In function `bar':
 c7189.c:2: warning: control reaches end of non-void function
 # gcc-3.4 -c -Wall c7189.c -foptimize-sibling-calls
 # 
 
 Greetz
 Steven