1 /*
   2  * Copyright (c) 2015, 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.nodes.debug;
  24 
  25 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_0;
  26 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_0;
  27 
  28 import org.graalvm.compiler.core.common.type.StampFactory;
  29 import org.graalvm.compiler.graph.Node;
  30 import org.graalvm.compiler.graph.NodeClass;
  31 import org.graalvm.compiler.nodeinfo.NodeInfo;
  32 import org.graalvm.compiler.nodes.FixedWithNextNode;
  33 import org.graalvm.compiler.nodes.Invoke;
  34 import org.graalvm.compiler.nodes.spi.LIRLowerable;
  35 import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;
  36 
  37 @NodeInfo(cycles = CYCLES_0, size = SIZE_0)
  38 public final class ControlFlowAnchorNode extends FixedWithNextNode implements LIRLowerable, ControlFlowAnchored {
  39 
  40     public static final NodeClass<ControlFlowAnchorNode> TYPE = NodeClass.create(ControlFlowAnchorNode.class);
  41 
  42     private static class Unique {
  43     }
  44 
  45     protected Unique unique;
  46 
  47     public ControlFlowAnchorNode() {
  48         super(TYPE, StampFactory.forVoid());
  49         this.unique = new Unique();
  50     }
  51 
  52     /**
  53      * Used by MacroSubstitution.
  54      */
  55     public ControlFlowAnchorNode(@SuppressWarnings("unused") Invoke invoke) {
  56         this();
  57     }
  58 
  59     @Override
  60     public void generate(NodeLIRBuilderTool generator) {
  61         // do nothing
  62     }
  63 
  64     @Override
  65     protected void afterClone(Node other) {
  66         assert other.graph() != null && other.graph() != graph() : this + " should never be cloned in the same graph";
  67     }
  68 }