Mercurial > hg > graal-compiler
view graal/com.oracle.max.graal.compiler/src/com/oracle/max/graal/compiler/ir/InstanceOf.java @ 3520:3e21ab23406b
changes CanonicalizerOp to Canonicalizable interface
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Tue, 09 Aug 2011 17:56:45 +0200 |
parents | 4275ca8dde2b |
children | 6b841b6b2437 |
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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.max.graal.compiler.ir; import com.oracle.max.graal.compiler.debug.*; import com.oracle.max.graal.compiler.phases.CanonicalizerPhase.Canonicalizable; import com.oracle.max.graal.compiler.phases.CanonicalizerPhase.NotifyReProcess; import com.oracle.max.graal.graph.*; import com.sun.cri.ci.*; /** * The {@code InstanceOf} instruction represents an instanceof test. */ public final class InstanceOf extends TypeCheck implements Canonicalizable { /** * Constructs a new InstanceOf instruction. * * @param targetClass the target class of the instanceof check * @param object the instruction producing the object input to this instruction * @param graph */ public InstanceOf(Constant targetClassInstruction, Value object, boolean nullIsTrue, Graph graph) { super(targetClassInstruction, object, CiKind.Illegal, graph); } @Override public void accept(ValueVisitor v) { } @Override public void print(LogStream out) { out.print("instanceof(").print(object()).print(") ").print(CiUtil.toJavaName(targetClass())); } @Override public Node canonical(NotifyReProcess reProcess) { if (object().exactType() != null) { return Constant.forBoolean(object().exactType().isSubtypeOf(targetClass()), graph()); } CiConstant constant = object().asConstant(); if (constant != null) { assert constant.kind == CiKind.Object; if (constant.isNull()) { return Constant.forBoolean(false, graph()); } else { // this should never happen - non-null constants are always expected to provide an exactType assert false; } } return this; } }