From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 21456 invoked by alias); 25 Aug 2006 17:01:30 -0000 Received: (qmail 21421 invoked by uid 48); 25 Aug 2006 17:01:20 -0000 Date: Fri, 25 Aug 2006 17:01:00 -0000 Message-ID: <20060825170120.21420.qmail@sourceware.org> X-Bugzilla-Reason: CC References: Subject: [Bug target/28764] [4.2 Regression] libjava build failure on sh4 In-Reply-To: Reply-To: gcc-bugzilla@gcc.gnu.org To: gcc-bugs@gcc.gnu.org From: "amylaar at gcc dot gnu dot org" 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/msg02164.txt.bz2 List-Id: ------- Comment #15 from amylaar at gcc dot gnu dot org 2006-08-25 17:01 ------- (In reply to comment #13) > For any transparent sub-graph, considering the expression anticipatable > in this graph is beneficial if the sum of the frequencies of outgoing edges > on which the expression is anticipatable is larger than the sum of the > frequencies of incoming edges on which the expression is not available. Actually, for SH variants with the FPCHG instruction, we could do a lower cost mode switch if the previous mode is known. Hence we can also add some benefit for the other mode being anticipatable, and the cost of the considered mode not being available is reduced when the other mode is available. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28764