1 /*
   2  * Copyright (c) 2012, 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.InputType;
  28 import org.graalvm.compiler.nodeinfo.NodeInfo;
  29 
  30 /**
  31  * Provides an implementation of {@link StateSplit}.
  32  */
  33 @NodeInfo
  34 public abstract class AbstractStateSplit extends FixedWithNextNode implements StateSplit {
  35 
  36     public static final NodeClass<AbstractStateSplit> TYPE = NodeClass.create(AbstractStateSplit.class);
  37     @OptionalInput(InputType.State) protected FrameState stateAfter;
  38 
  39     @Override
  40     public FrameState stateAfter() {
  41         return stateAfter;
  42     }
  43 
  44     @Override
  45     public void setStateAfter(FrameState x) {
  46         assert x == null || x.isAlive() : "frame state must be in a graph";
  47         updateUsages(stateAfter, x);
  48         stateAfter = x;
  49     }
  50 
  51     @Override
  52     public boolean hasSideEffect() {
  53         return true;
  54     }
  55 
  56     protected AbstractStateSplit(NodeClass<? extends AbstractStateSplit> c, Stamp stamp) {
  57         this(c, stamp, null);
  58     }
  59 
  60     protected AbstractStateSplit(NodeClass<? extends AbstractStateSplit> c, Stamp stamp, FrameState stateAfter) {
  61         super(c, stamp);
  62         this.stateAfter = stateAfter;
  63     }
  64 }