Mercurial > hg > truffle
view graal/com.oracle.graal.compiler.phases/src/com/oracle/graal/compiler/phases/PhiStampPhase.java @ 6411:c5afcc2ebd3d
change of project structure: separate compiler and LIR, put EA into separate project
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Mon, 17 Sep 2012 16:08:46 +0200 |
parents | graal/com.oracle.graal.compiler/src/com/oracle/graal/compiler/phases/PhiStampPhase.java@d71eb56d6bb0 |
children |
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/* * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.oracle.graal.compiler.phases; import com.oracle.graal.nodes.*; public class PhiStampPhase extends Phase { @Override protected void run(StructuredGraph graph) { // Infer phis stopping at loop phis. for (PhiNode phi : graph.getNodes(PhiNode.class)) { inferPhi(phi); } // Start iterative inference for loop phis. if (graph.hasLoops()) { for (PhiNode phi : graph.getNodes(PhiNode.class)) { if (phi.isLoopPhi()) { iterativeInferPhi(phi); } } } } private void iterativeInferPhi(PhiNode phi) { if (phi.inferPhiStamp()) { for (PhiNode phiUsage : phi.usages().filter(PhiNode.class)) { iterativeInferPhi(phiUsage); } } } private void inferPhi(PhiNode phi) { for (PhiNode phiInput : phi.values().filter(PhiNode.class)) { if (!phiInput.isLoopPhi()) { inferPhi(phiInput); } } phi.inferPhiStamp(); } }