1 /* 2 * Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package org.graalvm.compiler.hotspot.nodes; 24 25 import static org.graalvm.compiler.nodeinfo.InputType.Anchor; 26 import static org.graalvm.compiler.nodeinfo.InputType.Guard; 27 import static org.graalvm.compiler.nodeinfo.InputType.Value; 28 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_0; 29 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_0; 30 31 import org.graalvm.compiler.core.common.type.StampFactory; 32 import org.graalvm.compiler.graph.NodeClass; 33 import org.graalvm.compiler.graph.spi.Simplifiable; 34 import org.graalvm.compiler.graph.spi.SimplifierTool; 35 import org.graalvm.compiler.nodeinfo.NodeInfo; 36 import org.graalvm.compiler.nodes.AbstractBeginNode; 37 import org.graalvm.compiler.nodes.FixedWithNextNode; 38 import org.graalvm.compiler.nodes.extended.GuardingNode; 39 40 @NodeInfo(allowedUsageTypes = {Value, Anchor, Guard}, cycles = CYCLES_0, size = SIZE_0) 41 public final class SnippetAnchorNode extends FixedWithNextNode implements Simplifiable, GuardingNode { 42 public static final NodeClass<SnippetAnchorNode> TYPE = NodeClass.create(SnippetAnchorNode.class); 43 44 public SnippetAnchorNode() { 45 super(TYPE, StampFactory.object()); 46 } 47 48 @Override 49 public void simplify(SimplifierTool tool) { 50 AbstractBeginNode prevBegin = AbstractBeginNode.prevBegin(this); 51 replaceAtUsages(Anchor, prevBegin); 52 replaceAtUsages(Guard, prevBegin); 53 if (tool.allUsagesAvailable() && hasNoUsages()) { 54 graph().removeFixed(this); 55 } 56 } 57 58 @NodeIntrinsic 59 public static native GuardingNode anchor(); 60 }