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comparison graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/java/NewInstanceNode.java @ 12380:e027a51bdd33

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exclude java.lang.ref.Reference from Escape Analysis
author Lukas Stadler <lukas.stadler@jku.at>
date Mon, 14 Oct 2013 10:45:02 +0200
parents 0fc653a9e019
children c6ab6ae1b360
comparison
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12379:edb2e6bd6a01 12380:e027a51bdd33
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any 20 * or visit www.oracle.com if you need additional information or have any
21 * questions. 21 * questions.
22 */ 22 */
23 package com.oracle.graal.nodes.java; 23 package com.oracle.graal.nodes.java;
24
25 import java.lang.ref.*;
24 26
25 import com.oracle.graal.api.meta.*; 27 import com.oracle.graal.api.meta.*;
26 import com.oracle.graal.graph.*; 28 import com.oracle.graal.graph.*;
27 import com.oracle.graal.graph.spi.*; 29 import com.oracle.graal.graph.spi.*;
28 import com.oracle.graal.nodes.*; 30 import com.oracle.graal.nodes.*;
46 * @param fillContents determines whether the new object's fields should be initialized to 48 * @param fillContents determines whether the new object's fields should be initialized to
47 * zero/null. 49 * zero/null.
48 */ 50 */
49 public NewInstanceNode(ResolvedJavaType type, boolean fillContents) { 51 public NewInstanceNode(ResolvedJavaType type, boolean fillContents) {
50 super(StampFactory.exactNonNull(type)); 52 super(StampFactory.exactNonNull(type));
53 assert !type.isArray();
51 this.instanceClass = type; 54 this.instanceClass = type;
52 this.fillContents = fillContents; 55 this.fillContents = fillContents;
53 } 56 }
54 57
55 /** 58 /**
82 tool.getLowerer().lower(this, tool); 85 tool.getLowerer().lower(this, tool);
83 } 86 }
84 87
85 @Override 88 @Override
86 public void virtualize(VirtualizerTool tool) { 89 public void virtualize(VirtualizerTool tool) {
87 if (instanceClass != null) { 90 /*
88 assert !instanceClass().isArray(); 91 * Reference objects can escape into their ReferenceQueue at any safepoint, therefore
92 * they're excluded from escape analysis.
93 */
94 if (!tool.getMetaAccessProvider().lookupJavaType(Reference.class).isAssignableFrom(instanceClass)) {
89 VirtualInstanceNode virtualObject = new VirtualInstanceNode(instanceClass(), true); 95 VirtualInstanceNode virtualObject = new VirtualInstanceNode(instanceClass(), true);
90 ResolvedJavaField[] fields = virtualObject.getFields(); 96 ResolvedJavaField[] fields = virtualObject.getFields();
91 ValueNode[] state = new ValueNode[fields.length]; 97 ValueNode[] state = new ValueNode[fields.length];
92 for (int i = 0; i < state.length; i++) { 98 for (int i = 0; i < state.length; i++) {
93 state[i] = ConstantNode.defaultForKind(fields[i].getType().getKind(), graph()); 99 state[i] = ConstantNode.defaultForKind(fields[i].getType().getKind(), graph());