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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
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 * 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.
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package org.graalvm.compiler.nodes.calc;

import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_1;

import org.graalvm.compiler.core.common.type.Stamp;
import org.graalvm.compiler.graph.NodeClass;
import org.graalvm.compiler.graph.spi.Canonicalizable;
import org.graalvm.compiler.nodeinfo.NodeInfo;
import org.graalvm.compiler.nodes.NodeView;
import org.graalvm.compiler.nodes.ValueNode;

The UnaryNode class is the base of arithmetic and bit logic operations with exactly one input. /**
 * The {@code UnaryNode} class is the base of arithmetic and bit logic operations with exactly one
 * input.
 */
@NodeInfo(size = SIZE_1)
public abstract class UnaryNode extends FloatingNode implements Canonicalizable.Unary<ValueNode> {

    public static final NodeClass<UnaryNode> TYPE = NodeClass.create(UnaryNode.class);
    @Input protected ValueNode value;

    @Override
    public ValueNode getValue() {
        return value;
    }

    public void setValue(ValueNode value) {
        updateUsages(this.value, value);
        this.value = value;
    }

    
Creates a new UnaryNode instance.
Params:
stamp – the result type of this instruction
value – the input instruction/**
     * Creates a new UnaryNode instance.
     *
     * @param stamp the result type of this instruction
     * @param value the input instruction
     */
    protected UnaryNode(NodeClass<? extends UnaryNode> c, Stamp stamp, ValueNode value) {
        super(c, stamp);
        this.value = value;
    }

    @Override
    public boolean inferStamp() {
        return updateStamp(foldStamp(value.stamp(NodeView.DEFAULT)));
    }

    
Compute an improved for this node using the passed in stamp. The stamp must be compatible with the current value of value. This code is used to provide the default implementation of inferStamp() and may be used by external optimizations. 
Params:
newStamp – /**
     * Compute an improved for this node using the passed in stamp. The stamp must be compatible
     * with the current value of {@link #value}. This code is used to provide the default
     * implementation of {@link #inferStamp()} and may be used by external optimizations.
     *
     * @param newStamp
     */
    public Stamp foldStamp(Stamp newStamp) {
        return stamp(NodeView.DEFAULT);
    }
}