From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 20936 invoked by alias); 13 Mar 2002 22:26:39 -0000 Mailing-List: contact gcc-prs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Archive: List-Post: List-Help: Sender: gcc-prs-owner@gcc.gnu.org Received: (qmail 20903 invoked by uid 61); 13 Mar 2002 22:26:38 -0000 Date: Wed, 13 Mar 2002 14:26:00 -0000 Message-ID: <20020313222638.20902.qmail@sources.redhat.com> To: dje@gcc.gnu.org, gcc-bugs@gcc.gnu.org, gcc-prs@gcc.gnu.org, haruki.kodera@nifty.com, nobody@gcc.gnu.org From: dje@gcc.gnu.org Reply-To: dje@gcc.gnu.org, dje@gcc.gnu.org, gcc-bugs@gcc.gnu.org, gcc-prs@gcc.gnu.org, haruki.kodera@nifty.com, nobody@gcc.gnu.org, gcc-gnats@gcc.gnu.org X-Mailer: gnatsweb 2.9.3 Subject: Re: optimization/5422: powerpc -O2 -fssa -fdce misoptimization X-SW-Source: 2002-03/txt/msg00461.txt.bz2 List-Id: Synopsis: powerpc -O2 -fssa -fdce misoptimization Responsible-Changed-From-To: unassigned->dje Responsible-Changed-By: dje Responsible-Changed-When: Wed Mar 13 14:26:38 2002 Responsible-Changed-Why: powerpc State-Changed-From-To: open->closed State-Changed-By: dje State-Changed-When: Wed Mar 13 14:26:38 2002 State-Changed-Why: @item -fssa @opindex fssa Perform optimizations in static single assignment form. Each function's flow graph is translated into SSA form, optimizations are performed, and the flow graph is translated back from SSA form. Users should not specify this option, since it is not yet ready for production use. @item -fdce @opindex fdce Perform dead-code elimination in SSA form. Requires @option{-fssa}. Like @option{-fssa}, this is an experimental feature. The SSA optimizations are experimental and should not be used. The options are known to produce incorrect results. Until these options are supported for production use, bug reports cannot be addressed. If you want to help with the development of these types of optimizations, please contact the developers directly. http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=5422