Mercurial > hg > graal-compiler
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/java/NewArrayNode.java @ 23394:964f28c04d7b default tip
Don't fill the code cache with nmethods from CTW
author | Tom Rodriguez <tom.rodriguez@oracle.com> |
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date | Fri, 05 Feb 2016 22:48:36 -0800 |
parents | 615f3bbbb174 |
children |
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/* * 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 com.oracle.graal.nodes.java; import java.util.Collections; import jdk.vm.ci.meta.ResolvedJavaType; import com.oracle.graal.compiler.common.type.StampFactory; import com.oracle.graal.graph.NodeClass; import com.oracle.graal.nodeinfo.NodeInfo; import com.oracle.graal.nodes.ConstantNode; import com.oracle.graal.nodes.FrameState; import com.oracle.graal.nodes.ValueNode; import com.oracle.graal.nodes.spi.VirtualizableAllocation; import com.oracle.graal.nodes.spi.VirtualizerTool; import com.oracle.graal.nodes.type.StampTool; import com.oracle.graal.nodes.virtual.VirtualArrayNode; import com.oracle.graal.nodes.virtual.VirtualObjectNode; /** * 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<NewArrayNode> TYPE = NodeClass.create(NewArrayNode.class); 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<? extends NewArrayNode> c, ResolvedJavaType elementType, ValueNode length, boolean fillContents, FrameState stateBefore) { super(c, StampFactory.exactNonNull(elementType.getArrayClass()), length, fillContents, stateBefore); } @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 StampTool.typeOrNull(this).getComponentType(); } @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.<MonitorIdNode> 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()); } }