Mercurial > hg > truffle
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/java/DynamicNewArrayNode.java @ 18689:8923610115c9
Capture worst case element type for Array.newInstance if known
author | Tom Rodriguez <tom.rodriguez@oracle.com> |
---|---|
date | Mon, 15 Dec 2014 13:10:44 -0800 |
parents | fb558b41d348 |
children | f57d86eb036f |
line wrap: on
line source
/* * Copyright (c) 2013, 2014, 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. */ //JaCoCo Exclude package com.oracle.graal.nodes.java; import java.lang.reflect.*; import java.util.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.compiler.common.type.*; import com.oracle.graal.graph.*; import com.oracle.graal.graph.spi.*; import com.oracle.graal.nodeinfo.*; import com.oracle.graal.nodes.*; /** * The {@code DynamicNewArrayNode} is used for allocation of arrays when the type is not a * compile-time constant. */ @NodeInfo public class DynamicNewArrayNode extends AbstractNewArrayNode { @Input ValueNode elementType; /** * A non-null value indicating the worst case element type. Mainly useful for distinguishing * Object arrays from primitive arrays. */ protected final Kind knownElementKind; public static DynamicNewArrayNode create(ValueNode elementType, ValueNode length) { return new DynamicNewArrayNode(elementType, length); } protected DynamicNewArrayNode(ValueNode elementType, ValueNode length) { this(elementType, length, true, null); } public static DynamicNewArrayNode create(ValueNode elementType, ValueNode length, boolean fillContents, Kind knownElementKind) { return new DynamicNewArrayNode(elementType, length, fillContents, knownElementKind); } protected DynamicNewArrayNode(ValueNode elementType, ValueNode length, boolean fillContents, Kind knownElementKind) { super(StampFactory.objectNonNull(), length, fillContents); this.elementType = elementType; this.knownElementKind = knownElementKind; } public ValueNode getElementType() { return elementType; } public Kind getKnownElementKind() { return knownElementKind; } protected NewArrayNode forConstantType(ResolvedJavaType type) { ValueNode len = length(); NewArrayNode ret = graph().add(NewArrayNode.create(type, len.isAlive() ? len : graph().addOrUniqueWithInputs(len), fillContents())); if (stateBefore() != null) { ret.setStateBefore(stateBefore()); } return ret; } @Override public void simplify(SimplifierTool tool) { if (isAlive() && elementType.isConstant()) { ResolvedJavaType javaType = tool.getConstantReflection().asJavaType(elementType.asConstant()); if (javaType != null && !javaType.equals(tool.getMetaAccess().lookupJavaType(void.class))) { NewArrayNode newArray = forConstantType(javaType); List<Node> snapshot = inputs().snapshot(); graph().replaceFixedWithFixed(this, newArray); for (Node input : snapshot) { tool.removeIfUnused(input); } tool.addToWorkList(newArray); } } } @NodeIntrinsic public static Object newArray(Class<?> componentType, int length) { return Array.newInstance(componentType, length); } @NodeIntrinsic private static native Object newArray(Class<?> componentType, int length, @ConstantNodeParameter boolean fillContents, @ConstantNodeParameter Kind knownElementKind); public static Object newUninitializedArray(Class<?> componentType, int length, Kind knownElementKind) { return newArray(componentType, length, false, knownElementKind); } }