From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-prs-return-15800-listarch-gcc-prs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 6528 invoked by alias); 16 Mar 2002 11:26:04 -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 6498 invoked by uid 71); 16 Mar 2002 11:26:02 -0000
Resent-Date: 16 Mar 2002 11:26:02 -0000
Resent-Message-ID: <20020316112602.6495.qmail@sources.redhat.com>
Resent-From: gcc-gnats@gcc.gnu.org (GNATS Filer)
Resent-To: nobody@gcc.gnu.org
Resent-Cc: gcc-prs@gcc.gnu.org, gcc-bugs@gcc.gnu.org
Resent-Reply-To: gcc-gnats@gcc.gnu.org, mrj@bigpond.net.au
Received:(qmail 5945 invoked by uid 61); 16 Mar 2002 11:23:25 -0000
Message-Id:<20020316112325.5942.qmail@sources.redhat.com>
Date: Sat, 16 Mar 2002 03:26:00 -0000
From: mrj@bigpond.net.au
Reply-To: mrj@bigpond.net.au
To: gcc-gnats@gcc.gnu.org
X-Send-Pr-Version:gnatsweb-2.9.3 (1.1.1.1.2.31)
Subject: optimization/5979: -fomit-frame-pointer inoperative in GCC 3.0.4 (x86)
X-SW-Source: 2002-03/txt/msg00568.txt.bz2
List-Id: <gcc-prs.sourceware.org>


>Number:         5979
>Category:       optimization
>Synopsis:       -fomit-frame-pointer inoperative in GCC 3.0.4 (x86)
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          pessimizes-code
>Submitter-Id:   net
>Arrival-Date:   Sat Mar 16 03:26:01 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     Mark Reginald James
>Release:        3.0.4
>Organization:
>Environment:
System: Linux 2.4.18 i686 unknown
Architecture: i686
host: i686-pc-linux-gnu
build: i686-pc-linux-gnu
target: i686-pc-linux-gnu
configured with: ../src/configure --prefix=/usr --with-cpu=athlon
>Description:
In 3.0.4 the ebp register is used as a frame pointer despite use of the -fomit-frame-pointer option.
>How-To-Repeat:
Compile this program:

main()
{
	int a=1;
}

with options -S -fomit-frame-pointer, and note used of epb
in the assembly output.
>Fix:
Change any assembly-coded function that expects epb to be unused to save and restore the epb register.
>Release-Note:
>Audit-Trail:
>Unformatted: