Mercurial > hg > truffle
diff graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/calc/ConditionalNode.java @ 5061:e808627bd16f
Renamed projects.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
---|---|
date | Thu, 08 Mar 2012 19:24:17 +0100 |
parents | graal/com.oracle.max.graal.nodes/src/com/oracle/graal/nodes/calc/ConditionalNode.java@4ed4295ce15f |
children | 0364a2a874b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/calc/ConditionalNode.java Thu Mar 08 19:24:17 2012 +0100 @@ -0,0 +1,75 @@ +/* + * 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.calc; + +import com.oracle.graal.nodes.*; +import com.oracle.graal.nodes.spi.*; + +/** + * The {@code ConditionalNode} class represents a comparison that yields one of two values. Note that these nodes are not + * built directly from the bytecode but are introduced by canonicalization. + */ +public class ConditionalNode extends BinaryNode implements Canonicalizable, LIRLowerable { + + @Input private BooleanNode condition; + + public BooleanNode condition() { + return condition; + } + + public ConditionalNode(BooleanNode condition, ValueNode trueValue, ValueNode falseValue) { + super(trueValue.kind(), trueValue, falseValue); + assert trueValue.kind() == falseValue.kind(); + this.condition = condition; + } + + public ValueNode trueValue() { + return x(); + } + + public ValueNode falseValue() { + return y(); + } + + @Override + public ValueNode canonical(CanonicalizerTool tool) { + if (condition instanceof ConstantNode) { + ConstantNode c = (ConstantNode) condition; + if (c.asConstant().asBoolean()) { + return trueValue(); + } else { + return falseValue(); + } + } + if (trueValue() == falseValue()) { + return trueValue(); + } + + return this; + } + + @Override + public void generate(LIRGeneratorTool generator) { + generator.emitConditional(this); + } +}