Mercurial > hg > graal-jvmci-8
view graal/com.oracle.graal.replacements/src/com/oracle/graal/replacements/nodes/ExplodeLoopNode.java @ 17450:45b45f902bed
removed Node generation (GRAAL-857)
author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 15 Oct 2014 15:35:33 +0200 |
parents | 0fe4732e5181 |
children | f57d86eb036f |
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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.replacements.nodes; import java.util.*; import com.oracle.graal.compiler.common.type.*; import com.oracle.graal.graph.*; import com.oracle.graal.nodeinfo.*; import com.oracle.graal.nodes.*; import com.oracle.graal.replacements.Snippet.VarargsParameter; /** * Placeholder node to denote to snippet preparation that the following loop must be completely * unrolled. * * @see VarargsParameter */ @NodeInfo public class ExplodeLoopNode extends FixedWithNextNode { public static ExplodeLoopNode create() { return new ExplodeLoopNode(); } protected ExplodeLoopNode() { super(StampFactory.forVoid()); } public LoopBeginNode findLoopBegin() { Node currentNext = next(); ArrayList<Node> succs = new ArrayList<>(); while (!(currentNext instanceof LoopBeginNode)) { assert currentNext != null : "cannot find loop after " + this; for (Node n : currentNext.cfgSuccessors()) { succs.add(n); } if (succs.size() == 1) { currentNext = succs.get(0); } else { return null; } } return (LoopBeginNode) currentNext; } /** * A call to this method must be placed immediately prior to the loop that is to be exploded. */ @NodeIntrinsic public static native void explodeLoop(); }