Mercurial > hg > truffle
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/ValueNode.java @ 8956:74725f2f6122
Add a deoptState for invokes so that they can loose their stateAfter
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Tue, 09 Apr 2013 16:27:59 +0200 |
parents | ec8ed9925f5a |
children | 183d33c76419 |
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/* * Copyright (c) 2009, 2011, 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 java.util.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.graph.*; import com.oracle.graal.graph.iterators.*; import com.oracle.graal.nodes.type.*; import com.oracle.graal.nodes.util.*; /** * This class represents a value within the graph, including local variables, phis, and all other * instructions. */ public abstract class ValueNode extends ScheduledNode implements StampProvider { /** * The kind of this value. This is {@link Kind#Void} for instructions that produce no value. * This kind is guaranteed to be a {@linkplain Kind#getStackKind() stack kind}. */ private Stamp stamp; @Input(notDataflow = true) private final NodeInputList<ValueNode> dependencies; /** * This collection keeps dependencies that should be observed while scheduling (guards, etc.). */ public NodeInputList<ValueNode> dependencies() { return dependencies; } public ValueNode(Stamp stamp) { this.stamp = stamp; this.dependencies = new NodeInputList<>(this); } public ValueNode(Stamp stamp, ValueNode... dependencies) { this.stamp = stamp; this.dependencies = new NodeInputList<>(this, dependencies); } public ValueNode(Stamp stamp, List<ValueNode> dependencies) { this.stamp = stamp; this.dependencies = new NodeInputList<>(this, dependencies); } public Stamp stamp() { return stamp; } public void setStamp(Stamp stamp) { this.stamp = stamp; } /** * Checks if the given stamp is different than the current one ( * {@code newStamp.equals(oldStamp) == false}). If it is different then the new stamp will * become the current stamp for this node. * * @return true if the stamp has changed, false otherwise. */ protected final boolean updateStamp(Stamp newStamp) { if (newStamp.equals(stamp)) { return false; } else { stamp = newStamp; return true; } } /** * This method can be overridden by subclasses of {@link ValueNode} if they need to recompute * their stamp if their inputs change. A typical implementation will compute the stamp and pass * it to {@link #updateStamp(Stamp)}, whose return value can be used as the result of this * method. * * @return true if the stamp has changed, false otherwise. */ public boolean inferStamp() { return false; } public Kind kind() { return stamp().kind(); } /** * Checks whether this value is a constant (i.e. it is of type {@link ConstantNode}. * * @return {@code true} if this value is a constant */ public final boolean isConstant() { return this instanceof ConstantNode; } private static final NodePredicate IS_CONSTANT = new NodePredicate() { @Override public boolean apply(Node n) { return n instanceof ValueNode && ((ValueNode) n).isConstant(); } }; public static NodePredicate isConstantPredicate() { return IS_CONSTANT; } /** * Checks whether this value represents the null constant. * * @return {@code true} if this value represents the null constant */ public final boolean isNullConstant() { return this instanceof ConstantNode && ((ConstantNode) this).value.isNull(); } /** * Convert this value to a constant if it is a constant, otherwise return null. * * @return the {@link Constant} represented by this value if it is a constant; {@code null} * otherwise */ public final Constant asConstant() { if (this instanceof ConstantNode) { return ((ConstantNode) this).value; } return null; } public <T extends Stamp> boolean verifyStamp(Class<T> stampClass) { assert stamp() != null; assert stampClass.isInstance(stamp()) : this + " (" + GraphUtil.approxSourceLocation(this) + ") has unexpected stamp type: expected " + stampClass.getName() + ", got " + stamp().getClass().getName() + ", usages=" + usages(); return true; } public final ObjectStamp objectStamp() { assert verifyStamp(ObjectStamp.class); return (ObjectStamp) stamp(); } public final IntegerStamp integerStamp() { assert verifyStamp(IntegerStamp.class); return (IntegerStamp) stamp(); } public final FloatStamp floatStamp() { assert verifyStamp(FloatStamp.class); return (FloatStamp) stamp(); } @Override public boolean verify() { assertTrue(kind() != null, "Should have a valid kind"); assertTrue(kind() == kind().getStackKind(), "Should have a stack kind : %s", kind()); return super.verify(); } @Override public Map<Object, Object> getDebugProperties(Map<Object, Object> map) { Map<Object, Object> properties = super.getDebugProperties(map); if (!dependencies.isEmpty()) { StringBuilder str = new StringBuilder(); for (int i = 0; i < dependencies.size(); i++) { str.append(i == 0 ? "" : ", ").append(dependencies.get(i) == null ? "null" : dependencies.get(i).toString(Verbosity.Id)); } properties.put("dependencies", str.toString()); } return properties; } }