From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-320700-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 22096 invoked by alias); 4 Jun 2010 23:15:35 -0000
Received: (qmail 21955 invoked by uid 48); 4 Jun 2010 23:15:16 -0000
Date: Fri, 04 Jun 2010 23:15:00 -0000
Message-ID: <20100604231516.21954.qmail@sourceware.org>
X-Bugzilla-Reason: CC
References: <bug-43529-18958@http.gcc.gnu.org/bugzilla/>
Subject: [Bug tree-optimization/43529] G++ doesn't optimize away empty loop when index is a double
In-Reply-To: <bug-43529-18958@http.gcc.gnu.org/bugzilla/>
Reply-To: gcc-bugzilla@gcc.gnu.org
To: gcc-bugs@gcc.gnu.org
From: "changpeng dot fang at amd dot com" <gcc-bugzilla@gcc.gnu.org>
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: 2010-06/txt/msg00535.txt.bz2



------- Comment #2 from changpeng dot fang at amd dot com  2010-06-04 23:15 -------
Interesting! What's the difference between 17 and 18?
------------
int main()
{
  double i;
  for(i=0; i<18; i+=1); /* gcc -O3, empty loop not removed */
}
----------------
int main()
{
  double i;
  for(i=0; i<17; i+=1); /* gcc -O3, empty loop removed */
}


-- 

changpeng dot fang at amd dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |changpeng dot fang at amd
                   |                            |dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43529