| /* |
| * Copyright (c) 2012, 2015, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package org.graalvm.compiler.nodes; |
| |
| import org.graalvm.compiler.graph.Node; |
| import org.graalvm.compiler.graph.NodeClass; |
| import org.graalvm.compiler.graph.spi.Canonicalizable; |
| import org.graalvm.compiler.graph.spi.CanonicalizerTool; |
| import org.graalvm.compiler.nodeinfo.NodeInfo; |
| import org.graalvm.compiler.nodes.spi.ValueProxy; |
| import org.graalvm.compiler.nodes.spi.Virtualizable; |
| import org.graalvm.compiler.nodes.spi.VirtualizerTool; |
| import org.graalvm.compiler.nodes.virtual.VirtualObjectNode; |
| |
| @NodeInfo(nameTemplate = "Proxy({i#value})") |
| public final class ValueProxyNode extends ProxyNode implements Canonicalizable, Virtualizable, ValueProxy { |
| |
| public static final NodeClass<ValueProxyNode> TYPE = NodeClass.create(ValueProxyNode.class); |
| @Input ValueNode value; |
| private final boolean loopPhiProxy; |
| |
| public ValueProxyNode(ValueNode value, LoopExitNode loopExit) { |
| super(TYPE, value.stamp(), loopExit); |
| this.value = value; |
| loopPhiProxy = loopExit.loopBegin().isPhiAtMerge(value); |
| } |
| |
| @Override |
| public ValueNode value() { |
| return value; |
| } |
| |
| @Override |
| public boolean inferStamp() { |
| return updateStamp(value.stamp()); |
| } |
| |
| @Override |
| public Node canonical(CanonicalizerTool tool) { |
| ValueNode curValue = value; |
| if (curValue.isConstant()) { |
| return curValue; |
| } |
| if (loopPhiProxy && !loopExit.loopBegin().isPhiAtMerge(curValue)) { |
| return curValue; |
| } |
| return this; |
| } |
| |
| @Override |
| public void virtualize(VirtualizerTool tool) { |
| ValueNode alias = tool.getAlias(value); |
| if (alias instanceof VirtualObjectNode) { |
| tool.replaceWithVirtual((VirtualObjectNode) alias); |
| } |
| } |
| |
| @Override |
| public ValueNode getOriginalNode() { |
| return value(); |
| } |
| } |