Mercurial > hg > graal-compiler
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/GuardedValueNode.java @ 22604:b00cc0475f31
Update jvmci import: Refactoring: Rename Kind to JavaKind.
author | Roland Schatz <roland.schatz@oracle.com> |
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date | Tue, 08 Sep 2015 19:57:39 +0200 |
parents | b611fa9fef24 |
children | 05183a084a08 |
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/* * Copyright (c) 2013, 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 com.oracle.graal.nodes; import jdk.internal.jvmci.meta.*; import com.oracle.graal.compiler.common.type.*; import com.oracle.graal.graph.*; import com.oracle.graal.graph.spi.*; import com.oracle.graal.nodeinfo.*; import com.oracle.graal.nodes.extended.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.nodes.virtual.*; /** * A node that changes the type of its input, usually narrowing it. For example, a GuardedValueNode * is used to keep the nodes depending on guards inside a loop during speculative guard movement. * * A GuardedValueNode will only go away if its guard is null or {@link StructuredGraph#start()}. */ @NodeInfo public final class GuardedValueNode extends FloatingGuardedNode implements LIRLowerable, Virtualizable, IterableNodeType, Canonicalizable, ValueProxy { public static final NodeClass<GuardedValueNode> TYPE = NodeClass.create(GuardedValueNode.class); @Input ValueNode object; protected final Stamp piStamp; public GuardedValueNode(ValueNode object, GuardingNode guard, Stamp stamp) { super(TYPE, stamp, guard); this.object = object; this.piStamp = stamp; } public GuardedValueNode(ValueNode object, GuardingNode guard) { this(object, guard, object.stamp()); } public ValueNode object() { return object; } @Override public void generate(NodeLIRBuilderTool generator) { if (object.getStackKind() != JavaKind.Void && object.getStackKind() != JavaKind.Illegal) { generator.setResult(this, generator.operand(object)); } } @Override public boolean inferStamp() { return updateStamp(piStamp.improveWith(object().stamp())); } @Override public void virtualize(VirtualizerTool tool) { ValueNode alias = tool.getAlias(object()); if (alias instanceof VirtualObjectNode) { tool.replaceWithVirtual((VirtualObjectNode) alias); } } @Override public Node canonical(CanonicalizerTool tool) { if (getGuard() == null) { if (stamp().equals(object().stamp())) { return object(); } else { return new PiNode(object(), stamp()); } } return this; } @Override public ValueNode getOriginalNode() { return object; } }