Mercurial > hg > truffle
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/calc/XorNode.java @ 18998:ec0733b5a90a
Allow final modifier on node subclasses and start adding the modifier to leaf classes.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
---|---|
date | Wed, 28 Jan 2015 02:34:14 +0100 |
parents | f57d86eb036f |
children | 1e49642dd130 |
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/* * Copyright (c) 2011, 2014, 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.api.code.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.compiler.common.type.*; import com.oracle.graal.compiler.common.type.ArithmeticOpTable.BinaryOp.Xor; import com.oracle.graal.graph.spi.*; import com.oracle.graal.lir.gen.*; import com.oracle.graal.nodeinfo.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.nodes.util.*; @NodeInfo(shortName = "^") public class XorNode extends BinaryArithmeticNode<Xor> { public XorNode(ValueNode x, ValueNode y) { super(ArithmeticOpTable::getXor, x, y); assert x.stamp().isCompatible(y.stamp()); } @Override public ValueNode canonical(CanonicalizerTool tool, ValueNode forX, ValueNode forY) { ValueNode ret = super.canonical(tool, forX, forY); if (ret != this) { return ret; } if (GraphUtil.unproxify(forX) == GraphUtil.unproxify(forY)) { return ConstantNode.forPrimitive(stamp(), getOp(forX, forY).getZero(forX.stamp())); } if (forX.isConstant() && !forY.isConstant()) { return new XorNode(forY, forX); } if (forY.isConstant()) { Constant c = forY.asConstant(); if (getOp(forX, forY).isNeutral(c)) { return forX; } if (c instanceof PrimitiveConstant && ((PrimitiveConstant) c).getKind().isNumericInteger()) { long rawY = ((PrimitiveConstant) c).asLong(); long mask = CodeUtil.mask(PrimitiveStamp.getBits(stamp())); if ((rawY & mask) == mask) { return new NotNode(forX); } } return reassociate(this, ValueNode.isConstantPredicate(), forX, forY); } return this; } @Override public void generate(NodeMappableLIRBuilder builder, ArithmeticLIRGenerator gen) { builder.setResult(this, gen.emitXor(builder.operand(getX()), builder.operand(getY()))); } }