From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 8080 invoked by alias); 25 Aug 2006 01:37:47 -0000 Received: (qmail 8023 invoked by uid 48); 25 Aug 2006 01:37:29 -0000 Date: Fri, 25 Aug 2006 01:37:00 -0000 Message-ID: <20060825013729.8022.qmail@sourceware.org> X-Bugzilla-Reason: CC References: Subject: [Bug middle-end/28071] [4.1/4.2 regression] A file that can not be compiled in reasonable time/space In-Reply-To: Reply-To: gcc-bugzilla@gcc.gnu.org To: gcc-bugs@gcc.gnu.org From: "amacleod at redhat dot com" Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org X-SW-Source: 2006-08/txt/msg02079.txt.bz2 List-Id: ------- Comment #47 from amacleod at redhat dot com 2006-08-25 01:37 ------- Created an attachment (id=12135) --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=12135&action=view) patch to resolve some of the SSA to Normal slowdowns. By re-implementing the live on entry/exit code, I get the following improvement at -O3: tree SSA to normal : 32.08 (35%) usr 0.08 ( 1%) sys 32.92 (28%) wall to tree SSA to normal : 16.19 (22%) usr 0.08 ( 1%) sys 16.33 (13%) wall the remaining SSA to normal time is the fault of TER at both -O3 and -O2. I'm not so sure this is stage 3 material, but I could be convinced. I'll attach the patch, but I'll post a full breakdown of what was implemented in a note to gcc-patches. It has been bootstrapped on i686-pc-linux-gnu with no new regressions. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28071