Mercurial > hg > graal-compiler
diff graal/GraalCompiler/src/com/sun/c1x/ir/CheckCast.java @ 2509:16b9a8b5ad39
Renamings Runtime=>GraalRuntime and Compiler=>GraalCompiler
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
---|---|
date | Wed, 27 Apr 2011 11:50:44 +0200 |
parents | graal/Compiler/src/com/sun/c1x/ir/CheckCast.java@9ec15d6914ca |
children | f1bc67c2d453 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/GraalCompiler/src/com/sun/c1x/ir/CheckCast.java Wed Apr 27 11:50:44 2011 +0200 @@ -0,0 +1,96 @@ +/* + * 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.sun.c1x.ir; + +import com.sun.c1x.debug.*; +import com.sun.c1x.util.*; +import com.sun.c1x.value.*; +import com.sun.cri.bytecode.*; +import com.sun.cri.ci.*; +import com.sun.cri.ri.*; + +/** + * The {@code CheckCast} instruction represents a {@link Bytecodes#CHECKCAST}. + * + * @author Ben L. Titzer + */ +public final class CheckCast extends TypeCheck { + + /** + * Creates a new CheckCast instruction. + * @param targetClass the class being cast to + * @param object the instruction producing the object + * @param stateBefore the state before the cast + */ + public CheckCast(RiType targetClass, Value targetClassInstruction, Value object, FrameState stateBefore) { + super(targetClass, targetClassInstruction, object, CiKind.Object, stateBefore); + initFlag(Flag.NonNull, object.isNonNull()); + } + + /** + * Gets the declared type of the result of this instruction. + * @return the declared type of the result + */ + @Override + public RiType declaredType() { + return targetClass; + } + + /** + * Gets the exact type of the result of this instruction. + * @return the exact type of the result + */ + @Override + public RiType exactType() { + return targetClass.isResolved() ? targetClass.exactType() : null; + } + + @Override + public void accept(ValueVisitor v) { + v.visitCheckCast(this); + } + + @Override + public int valueNumber() { + return targetClass.isResolved() ? Util.hash1(Bytecodes.CHECKCAST, object) : 0; + } + + @Override + public boolean valueEqual(Instruction i) { + if (i instanceof CheckCast) { + CheckCast o = (CheckCast) i; + return targetClass == o.targetClass && object == o.object; + } + return false; + } + + @Override + public void print(LogStream out) { + out.print("checkcast("). + print(object()). + print(","). + print(targetClassInstruction()). + print(") "). + print(CiUtil.toJavaName(targetClass())); + } +}