1 /*
   2  * Copyright (c) 2011, 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;
  24 
  25 import org.graalvm.compiler.core.common.type.Stamp;
  26 import org.graalvm.compiler.graph.NodeClass;
  27 import org.graalvm.compiler.nodeinfo.NodeInfo;
  28 
  29 @NodeInfo
  30 public abstract class FixedNode extends ValueNode implements FixedNodeInterface {
  31     public static final NodeClass<FixedNode> TYPE = NodeClass.create(FixedNode.class);
  32 
  33     protected FixedNode(NodeClass<? extends FixedNode> c, Stamp stamp) {
  34         super(c, stamp);
  35     }
  36 
  37     @Override
  38     public boolean verify() {
  39         assertTrue(this.successors().isNotEmpty() || this.predecessor() != null, "FixedNode should not float");
  40         return super.verify();
  41     }
  42 
  43     @Override
  44     public FixedNode asNode() {
  45         return this;
  46     }
  47 }