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;
  24 
  25 import static org.graalvm.compiler.nodeinfo.InputType.Association;
  26 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_0;
  27 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_0;
  28 
  29 import org.graalvm.compiler.graph.NodeClass;
  30 import org.graalvm.compiler.nodeinfo.NodeInfo;
  31 import org.graalvm.compiler.nodes.calc.FloatingNode;
  32 import org.graalvm.compiler.nodes.extended.GuardingNode;
  33 import org.graalvm.compiler.nodes.spi.ValueProxy;
  34 
  35 /**
  36  * Proxy node that is used in OSR. This node drops the stamp information from the value, since the
  37  * types we see during OSR may be too precise (if a branch was not parsed for example).
  38  */
  39 @NodeInfo(nameTemplate = "EntryProxy({i#value})", cycles = CYCLES_0, size = SIZE_0)
  40 public final class EntryProxyNode extends FloatingNode implements ValueProxy {
  41 
  42     public static final NodeClass<EntryProxyNode> TYPE = NodeClass.create(EntryProxyNode.class);
  43     @Input(Association) EntryMarkerNode proxyPoint;
  44     @Input ValueNode value;
  45 
  46     public EntryProxyNode(ValueNode value, EntryMarkerNode proxyPoint) {
  47         super(TYPE, value.stamp().unrestricted());
  48         this.value = value;
  49         this.proxyPoint = proxyPoint;
  50     }
  51 
  52     public ValueNode value() {
  53         return value;
  54     }
  55 
  56     @Override
  57     public ValueNode getOriginalNode() {
  58         return value();
  59     }
  60 
  61     @Override
  62     public GuardingNode getGuard() {
  63         return proxyPoint;
  64     }
  65 }