1/* 2 * Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23package org.graalvm.compiler.nodes.calc; 24 25import org.graalvm.compiler.core.common.type.ArithmeticOpTable; 26import org.graalvm.compiler.core.common.type.ArithmeticOpTable.BinaryOp; 27import org.graalvm.compiler.core.common.type.ArithmeticOpTable.BinaryOp.And; 28import org.graalvm.compiler.core.common.type.IntegerStamp; 29import org.graalvm.compiler.core.common.type.PrimitiveStamp; 30import org.graalvm.compiler.core.common.type.Stamp; 31import org.graalvm.compiler.graph.NodeClass; 32import org.graalvm.compiler.graph.spi.Canonicalizable.BinaryCommutative; 33import org.graalvm.compiler.graph.spi.CanonicalizerTool; 34import org.graalvm.compiler.lir.gen.ArithmeticLIRGeneratorTool; 35import org.graalvm.compiler.nodeinfo.NodeInfo; 36import org.graalvm.compiler.nodes.ConstantNode; 37import org.graalvm.compiler.nodes.ValueNode; 38import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool; 39import org.graalvm.compiler.nodes.util.GraphUtil; 40 41import jdk.vm.ci.code.CodeUtil; 42import jdk.vm.ci.meta.Constant; 43import jdk.vm.ci.meta.PrimitiveConstant; 44 45@NodeInfo(shortName = "&") 46public final class AndNode extends BinaryArithmeticNode<And> implements NarrowableArithmeticNode, BinaryCommutative<ValueNode> { 47 48 public static final NodeClass<AndNode> TYPE = NodeClass.create(AndNode.class); 49 50 public AndNode(ValueNode x, ValueNode y) { 51 super(TYPE, ArithmeticOpTable::getAnd, x, y); 52 } 53 54 public static ValueNode create(ValueNode x, ValueNode y) { 55 BinaryOp<And> op = ArithmeticOpTable.forStamp(x.stamp()).getAnd(); 56 Stamp stamp = op.foldStamp(x.stamp(), y.stamp()); 57 ConstantNode tryConstantFold = tryConstantFold(op, x, y, stamp); 58 if (tryConstantFold != null) { 59 return tryConstantFold; 60 } else { 61 return new AndNode(x, y).maybeCommuteInputs(); 62 } 63 } 64 65 @Override 66 public ValueNode canonical(CanonicalizerTool tool, ValueNode forX, ValueNode forY) { 67 ValueNode ret = super.canonical(tool, forX, forY); 68 if (ret != this) { 69 return ret; 70 } 71 72 if (GraphUtil.unproxify(forX) == GraphUtil.unproxify(forY)) { 73 return forX; 74 } 75 if (forX.isConstant() && !forY.isConstant()) { 76 return new AndNode(forY, forX); 77 } 78 if (forY.isConstant()) { 79 Constant c = forY.asConstant(); 80 if (getOp(forX, forY).isNeutral(c)) { 81 return forX; 82 } 83 84 if (c instanceof PrimitiveConstant && ((PrimitiveConstant) c).getJavaKind().isNumericInteger()) { 85 long rawY = ((PrimitiveConstant) c).asLong(); 86 long mask = CodeUtil.mask(PrimitiveStamp.getBits(stamp())); 87 if ((rawY & mask) == 0) { 88 return ConstantNode.forIntegerStamp(stamp(), 0); 89 } 90 if (forX instanceof SignExtendNode) { 91 SignExtendNode ext = (SignExtendNode) forX; 92 if (rawY == ((1L << ext.getInputBits()) - 1)) { 93 return new ZeroExtendNode(ext.getValue(), ext.getResultBits()); 94 } 95 } 96 IntegerStamp xStamp = (IntegerStamp) forX.stamp(); 97 if (((xStamp.upMask() | xStamp.downMask()) & ~rawY) == 0) { 98 // No bits are set which are outside the mask, so the mask will have no effect. 99 return forX; 100 } 101 } 102 103 return reassociate(this, ValueNode.isConstantPredicate(), forX, forY); 104 } 105 return this; 106 } 107 108 @Override 109 public void generate(NodeLIRBuilderTool nodeValueMap, ArithmeticLIRGeneratorTool gen) { 110 nodeValueMap.setResult(this, gen.emitAnd(nodeValueMap.operand(getX()), nodeValueMap.operand(getY()))); 111 } 112} 113