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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
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package org.graalvm.compiler.replacements.nodes;

import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_0;
import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_0;

import org.graalvm.compiler.api.replacements.Snippet.VarargsParameter;
import org.graalvm.compiler.core.common.type.Stamp;
import org.graalvm.compiler.graph.Node;
import org.graalvm.compiler.graph.NodeClass;
import org.graalvm.compiler.graph.NodeInputList;
import org.graalvm.compiler.graph.spi.Canonicalizable;
import org.graalvm.compiler.graph.spi.CanonicalizerTool;
import org.graalvm.compiler.nodeinfo.NodeInfo;
import org.graalvm.compiler.nodes.FixedWithNextNode;
import org.graalvm.compiler.nodes.ParameterNode;
import org.graalvm.compiler.nodes.ValueNode;

Implements the semantics of VarargsParameter.
/** * Implements the semantics of {@link VarargsParameter}. */
@NodeInfo(cycles = CYCLES_0, size = SIZE_0) public final class LoadSnippetVarargParameterNode extends FixedWithNextNode implements Canonicalizable { public static final NodeClass<LoadSnippetVarargParameterNode> TYPE = NodeClass.create(LoadSnippetVarargParameterNode.class); @Input ValueNode index; @Input NodeInputList<ParameterNode> parameters; public LoadSnippetVarargParameterNode(ParameterNode[] locals, ValueNode index, Stamp stamp) { super(TYPE, stamp); this.index = index; this.parameters = new NodeInputList<>(this, locals); } @Override public Node canonical(CanonicalizerTool tool) { if (index.isConstant()) { int indexValue = index.asJavaConstant().asInt(); if (indexValue < parameters.size()) { return parameters.get(indexValue); } } return this; } }