Return-Path: Delivered-To: apmail-harmony-commits-archive@www.apache.org Received: (qmail 7529 invoked from network); 7 May 2008 11:59:09 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.2) by minotaur.apache.org with SMTP; 7 May 2008 11:59:09 -0000 Received: (qmail 21758 invoked by uid 500); 7 May 2008 11:59:11 -0000 Delivered-To: apmail-harmony-commits-archive@harmony.apache.org Received: (qmail 21742 invoked by uid 500); 7 May 2008 11:59:11 -0000 Mailing-List: contact commits-help@harmony.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: dev@harmony.apache.org Delivered-To: mailing list commits@harmony.apache.org Received: (qmail 21731 invoked by uid 99); 7 May 2008 11:59:11 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 07 May 2008 04:59:11 -0700 X-ASF-Spam-Status: No, hits=-2000.0 required=10.0 tests=ALL_TRUSTED X-Spam-Check-By: apache.org Received: from [140.211.11.130] (HELO eos.apache.org) (140.211.11.130) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 07 May 2008 11:58:33 +0000 Received: from eos.apache.org (localhost [127.0.0.1]) by eos.apache.org (Postfix) with ESMTP id 64350D2EB for ; Wed, 7 May 2008 11:58:48 +0000 (GMT) Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit From: Apache Wiki To: commits@harmony.apache.org Date: Wed, 07 May 2008 11:58:48 -0000 Message-ID: <20080507115848.22775.83524@eos.apache.org> Subject: [Harmony Wiki] Update of "Jitrino OPT/layout" by Mikhail Fursov X-Virus-Checked: Checked by ClamAV on apache.org Dear Wiki user, You have subscribed to a wiki page or wiki category on "Harmony Wiki" for change notification. The following page has been changed by Mikhail Fursov: http://wiki.apache.org/harmony/Jitrino_OPT/layout New page: The 'layout' is LIR transformation used to assign relative positions for basic blocks in memory. Three different layout algorithms are supported today: 1) Topological (reverse-postorder) layout of basic blocks 2) Top-down layout algorithm 3) Bottom-up layout algorithm To read more about top-down and bottom-up algorithm details check "Profile guided code positioning" paper by Hansen & Pettis. Command line line options: jit.arg.codegen.layout.type=topological - enables topological layout jit.arg.codegen.layout.type=topdown - enables top-down layout jit.arg.codegen.layout.type=bottomup - enables bottom-up layout jit.arg.codegen.layout.type=mixed - enables top-down layout for methods without loops and bottom-up for methods with loops Source files: src/codegenerator/ia32/Ia32CodeLayout.* src/codegenerator/ia32/Ia32CodeLayoutTopDown.* src/codegenerator/ia32/Ia32CodeLayoutBottomUp.*