--- /dev/null 2016-05-31 09:42:47.975716356 -0700 +++ new/src/jdk.vm.compiler/share/classes/org.graalvm.compiler.nodes/src/org/graalvm/compiler/nodes/java/NewArrayNode.java 2016-12-09 00:55:50.668123027 -0800 @@ -0,0 +1,107 @@ +/* + * Copyright (c) 2009, 2015, 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 org.graalvm.compiler.nodes.java; + +import java.util.Collections; + +import org.graalvm.compiler.core.common.type.StampFactory; +import org.graalvm.compiler.core.common.type.TypeReference; +import org.graalvm.compiler.graph.NodeClass; +import org.graalvm.compiler.nodeinfo.NodeInfo; +import org.graalvm.compiler.nodes.ConstantNode; +import org.graalvm.compiler.nodes.FrameState; +import org.graalvm.compiler.nodes.ValueNode; +import org.graalvm.compiler.nodes.spi.VirtualizableAllocation; +import org.graalvm.compiler.nodes.spi.VirtualizerTool; +import org.graalvm.compiler.nodes.virtual.VirtualArrayNode; +import org.graalvm.compiler.nodes.virtual.VirtualObjectNode; + +import jdk.vm.ci.meta.ResolvedJavaType; + +/** + * The {@code NewArrayNode} is used for all array allocations where the element type is know at + * compile time. + */ +// JaCoCo Exclude +@NodeInfo +public class NewArrayNode extends AbstractNewArrayNode implements VirtualizableAllocation { + + public static final NodeClass TYPE = NodeClass.create(NewArrayNode.class); + private final ResolvedJavaType elementType; + + public NewArrayNode(ResolvedJavaType elementType, ValueNode length, boolean fillContents) { + this(elementType, length, fillContents, null); + } + + public NewArrayNode(ResolvedJavaType elementType, ValueNode length, boolean fillContents, FrameState stateBefore) { + this(TYPE, elementType, length, fillContents, stateBefore); + } + + protected NewArrayNode(NodeClass c, ResolvedJavaType elementType, ValueNode length, boolean fillContents, FrameState stateBefore) { + super(c, StampFactory.objectNonNull(TypeReference.createExactTrusted(elementType.getArrayClass())), length, fillContents, stateBefore); + this.elementType = elementType; + } + + @NodeIntrinsic + private static native Object newArray(@ConstantNodeParameter Class elementType, int length, @ConstantNodeParameter boolean fillContents); + + public static Object newUninitializedArray(Class elementType, int length) { + return newArray(elementType, length, false); + } + + /** + * Gets the element type of the array. + * + * @return the element type of the array + */ + public ResolvedJavaType elementType() { + return elementType; + } + + @Override + public void virtualize(VirtualizerTool tool) { + ValueNode lengthAlias = tool.getAlias(length()); + if (lengthAlias.asConstant() != null) { + int constantLength = lengthAlias.asJavaConstant().asInt(); + if (constantLength >= 0 && constantLength < tool.getMaximumEntryCount()) { + ValueNode[] state = new ValueNode[constantLength]; + ConstantNode defaultForKind = constantLength == 0 ? null : defaultElementValue(); + for (int i = 0; i < constantLength; i++) { + state[i] = defaultForKind; + } + VirtualObjectNode virtualObject = createVirtualArrayNode(constantLength); + tool.createVirtualObject(virtualObject, state, Collections. emptyList(), false); + tool.replaceWithVirtual(virtualObject); + } + } + } + + protected VirtualArrayNode createVirtualArrayNode(int constantLength) { + return new VirtualArrayNode(elementType(), constantLength); + } + + /* Factored out in a separate method so that subclasses can override it. */ + protected ConstantNode defaultElementValue() { + return ConstantNode.defaultForKind(elementType().getJavaKind(), graph()); + } +}