Mercurial > hg > graal-compiler
view graal/com.oracle.max.graal.nodes/src/com/oracle/graal/nodes/java/InstanceOfNode.java @ 5060:4ed4295ce15f
Update import statements.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Thu, 08 Mar 2012 19:11:12 +0100 |
parents | ed559a528128 |
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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.java; import com.oracle.max.cri.ci.*; import com.oracle.max.cri.ri.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.calc.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.nodes.type.*; /** * The {@code InstanceOfNode} represents an instanceof test. */ public final class InstanceOfNode extends TypeCheckNode implements Canonicalizable, LIRLowerable { @Data private final boolean negated; public boolean negated() { return negated; } /** * Constructs a new InstanceOfNode. * * @param targetClassInstruction the instruction which produces the target class of the instanceof check * @param targetClass the class which is the target of the instanceof check * @param object the instruction producing the object input to this instruction */ public InstanceOfNode(ValueNode targetClassInstruction, RiResolvedType targetClass, ValueNode object, boolean negated) { this(targetClassInstruction, targetClass, object, EMPTY_HINTS, false, negated); } public InstanceOfNode(ValueNode targetClassInstruction, RiResolvedType targetClass, ValueNode object, RiResolvedType[] hints, boolean hintsExact, boolean negated) { super(targetClassInstruction, targetClass, object, hints, hintsExact, StampFactory.illegal()); this.negated = negated; assert targetClass != null; } @Override public void generate(LIRGeneratorTool gen) { } @Override public ValueNode canonical(CanonicalizerTool tool) { assert object() != null : this; RiResolvedType exact = object().exactType(); if (exact != null) { boolean result = exact.isSubtypeOf(targetClass()); if (result != negated) { // The instanceof check reduces to a null check. return graph().unique(new NullCheckNode(object(), false)); } else { // The instanceof check can never succeed. return ConstantNode.forBoolean(false, graph()); } } CiConstant constant = object().asConstant(); if (constant != null) { assert constant.kind == CiKind.Object; if (constant.isNull()) { return ConstantNode.forBoolean(negated, graph()); } else { assert false : "non-null constants are always expected to provide an exactType"; } } if (tool.assumptions() != null && hints() != null && targetClass() != null) { if (!hintsExact() && hints().length == 1 && hints()[0] == targetClass().uniqueConcreteSubtype()) { tool.assumptions().recordConcreteSubtype(targetClass(), hints()[0]); return graph().unique(new InstanceOfNode(targetClassInstruction(), targetClass(), object(), hints(), true, negated)); } } return this; } @Override public BooleanNode negate() { return graph().unique(new InstanceOfNode(targetClassInstruction(), targetClass(), object(), hints(), hintsExact(), !negated)); } }