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package org.graalvm.compiler.nodes.calc;
import org.graalvm.compiler.core.common.type.ArithmeticOpTable;
import org.graalvm.compiler.core.common.type.ArithmeticOpTable.BinaryOp;
import org.graalvm.compiler.core.common.type.ArithmeticOpTable.BinaryOp.Xor;
import org.graalvm.compiler.core.common.type.PrimitiveStamp;
import org.graalvm.compiler.core.common.type.Stamp;
import org.graalvm.compiler.graph.NodeClass;
import org.graalvm.compiler.graph.spi.Canonicalizable.BinaryCommutative;
import org.graalvm.compiler.graph.spi.CanonicalizerTool;
import org.graalvm.compiler.lir.gen.ArithmeticLIRGeneratorTool;
import org.graalvm.compiler.nodeinfo.NodeInfo;
import org.graalvm.compiler.nodes.ConstantNode;
import org.graalvm.compiler.nodes.ValueNode;
import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;
import org.graalvm.compiler.nodes.util.GraphUtil;
import jdk.vm.ci.code.CodeUtil;
import jdk.vm.ci.meta.Constant;
import jdk.vm.ci.meta.PrimitiveConstant;
@NodeInfo(shortName = "^")
public final class XorNode extends BinaryArithmeticNode<Xor> implements BinaryCommutative<ValueNode>, NarrowableArithmeticNode {
public static final NodeClass<XorNode> TYPE = NodeClass.create(XorNode.class);
public XorNode(ValueNode x, ValueNode y) {
super(TYPE, ArithmeticOpTable::getXor, x, y);
assert x.stamp().isCompatible(y.stamp());
}
public static ValueNode create(ValueNode x, ValueNode y) {
BinaryOp<Xor> op = ArithmeticOpTable.forStamp(x.stamp()).getXor();
Stamp stamp = op.foldStamp(x.stamp(), y.stamp());
ConstantNode tryConstantFold = tryConstantFold(op, x, y, stamp);
if (tryConstantFold != null) {
return tryConstantFold;
}
return canonical(null, op, stamp, x, y);
}
@Override
public ValueNode canonical(CanonicalizerTool tool, ValueNode forX, ValueNode forY) {
ValueNode ret = super.canonical(tool, forX, forY);
if (ret != this) {
return ret;
}
return canonical(this, getOp(forX, forY), stamp(), forX, forY);
}
private static ValueNode canonical(XorNode self, BinaryOp<Xor> op, Stamp stamp, ValueNode forX, ValueNode forY) {
if (GraphUtil.unproxify(forX) == GraphUtil.unproxify(forY)) {
return ConstantNode.forPrimitive(stamp, op.getZero(forX.stamp()));
}
if (forX.isConstant() && !forY.isConstant()) {
return new XorNode(forY, forX);
}
if (forY.isConstant()) {
Constant c = forY.asConstant();
if (op.isNeutral(c)) {
return forX;
}
if (c instanceof PrimitiveConstant && ((PrimitiveConstant) c).getJavaKind().isNumericInteger()) {
long rawY = ((PrimitiveConstant) c).asLong();
long mask = CodeUtil.mask(PrimitiveStamp.getBits(stamp));
if ((rawY & mask) == mask) {
return new NotNode(forX);
}
}
return reassociate(self != null ? self : (XorNode) new XorNode(forX, forY).maybeCommuteInputs(), ValueNode.isConstantPredicate(), forX, forY);
}
return self != null ? self : new XorNode(forX, forY).maybeCommuteInputs();
}
@Override
public void generate(NodeLIRBuilderTool nodeValueMap, ArithmeticLIRGeneratorTool gen) {
nodeValueMap.setResult(this, gen.emitXor(nodeValueMap.operand(getX()), nodeValueMap.operand(getY())));
}
}