From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-136373-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 12803 invoked by alias); 31 Mar 2005 05:06:42 -0000
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
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 12620 invoked by uid 48); 31 Mar 2005 05:05:57 -0000
Date: Thu, 31 Mar 2005 05:06:00 -0000
Message-ID: <20050331050557.12619.qmail@sourceware.org>
From: "varun0005 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
In-Reply-To: <20050330095906.20689.varun0005@gmail.com>
References: <20050330095906.20689.varun0005@gmail.com>
Reply-To: gcc-bugzilla@gcc.gnu.org
Subject: [Bug c/20689] strict aliasing with temporary variable never gives warnings
X-Bugzilla-Reason: CC
X-SW-Source: 2005-03/txt/msg03528.txt.bz2
List-Id: <gcc-bugs.sourceware.org>


------- Additional Comments From varun0005 at gmail dot com  2005-03-31 05:05 -------
please ignore previous code and consider this piece as example ... problem is
same .the exact programs are following and command line was gcc -Wall -O2
test1.c test2.c....In this why test1.c not giving warning but test2.c giving
violation of strict-aliasing warning.
//test1.c
#include <stdio.h>
#include <stdlib.h>
int main()
{ int *i;
float **q;
int **r;
i =(int *)malloc(sizeof(int));
r=&i;
q=(float **)r;
return 0;
}
//test2.c
int main(){
int *i;
float **q; 
i =(int *)malloc(sizeof(int));
q= (float **) &i;
return 0;
}

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20689