Mercurial > hg > truffle
view graal/com.oracle.graal.phases.common/src/com/oracle/graal/phases/common/cfs/IterativeFlowSensitiveReductionPhase.java @ 18408:2c3666f44855
Truffle: initial commit of object API implementation
author | Andreas Woess <andreas.woess@jku.at> |
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date | Tue, 18 Nov 2014 23:19:43 +0100 |
parents | e3f3233ec6cd |
children |
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/* * Copyright (c) 2012, 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.phases.common.cfs; import static com.oracle.graal.graph.Graph.NodeEvent.*; import com.oracle.graal.api.code.*; import com.oracle.graal.graph.Graph.NodeEventScope; import com.oracle.graal.graph.*; import com.oracle.graal.graph.spi.*; import com.oracle.graal.nodes.*; import com.oracle.graal.phases.*; import com.oracle.graal.phases.common.*; import com.oracle.graal.phases.common.util.*; import com.oracle.graal.phases.tiers.*; public class IterativeFlowSensitiveReductionPhase extends BasePhase<PhaseContext> { private static final int MAX_ITERATIONS = 256; private final CanonicalizerPhase canonicalizer; public IterativeFlowSensitiveReductionPhase(CanonicalizerPhase canonicalizer) { this.canonicalizer = canonicalizer; } // private Histogram histogram = new Histogram("FSR-"); @Override protected void run(StructuredGraph graph, PhaseContext context) { FlowSensitiveReductionPhase eliminate = new FlowSensitiveReductionPhase(context.getMetaAccess()); HashSetNodeEventListener listener = new HashSetNodeEventListener().exclude(NODE_ADDED); int count = 1; while (true) { try (NodeEventScope nes = graph.trackNodeEvents(listener)) { eliminate.apply(graph, context); } if (listener.getNodes().isEmpty()) { // histogram.tick(count); break; } for (Node node : graph.getNodes()) { if (node instanceof Simplifiable) { listener.getNodes().add(node); } } canonicalizer.applyIncremental(graph, context, listener.getNodes()); listener.getNodes().clear(); if (++count > MAX_ITERATIONS) { // System.out.println("Bailing out IterativeFlowSensitiveReductionPhase for graph: " // + graph); // FlowUtil.visualize(graph, "Bailout"); throw new BailoutException("Number of iterations in FlowSensitiveReductionPhase exceeds %d", MAX_ITERATIONS); } } // histogram.print(); } }