| /* |
| * Copyright (c) 2011, 2013, 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 org.graalvm.compiler.phases.common; |
| |
| import static org.graalvm.compiler.core.common.GraalOptions.GenLoopSafepoints; |
| |
| import org.graalvm.compiler.nodes.LoopEndNode; |
| import org.graalvm.compiler.nodes.SafepointNode; |
| import org.graalvm.compiler.nodes.StructuredGraph; |
| import org.graalvm.compiler.phases.Phase; |
| |
| /** |
| * Adds safepoints to loops. |
| */ |
| public class LoopSafepointInsertionPhase extends Phase { |
| |
| @Override |
| public boolean checkContract() { |
| // the size / cost after is highly dynamic and dependent on the graph, thus we do not verify |
| // costs for this phase |
| return false; |
| } |
| |
| @Override |
| protected void run(StructuredGraph graph) { |
| if (GenLoopSafepoints.getValue()) { |
| for (LoopEndNode loopEndNode : graph.getNodes(LoopEndNode.TYPE)) { |
| if (loopEndNode.canSafepoint()) { |
| SafepointNode safepointNode = graph.add(new SafepointNode()); |
| graph.addBeforeFixed(loopEndNode, safepointNode); |
| } |
| } |
| } |
| } |
| } |
