1 /* 2 * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 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 21 * questions. 22 */ 23 24 25 package org.graalvm.compiler.nodes; 26 27 import org.graalvm.compiler.core.common.type.Stamp; 28 import org.graalvm.compiler.core.common.type.StampFactory; 29 import org.graalvm.compiler.core.common.type.TypeReference; 30 import org.graalvm.compiler.graph.Node; 31 import org.graalvm.compiler.graph.NodeClass; 32 import org.graalvm.compiler.graph.spi.CanonicalizerTool; 33 import org.graalvm.compiler.nodeinfo.NodeInfo; 34 import org.graalvm.compiler.nodes.extended.GuardingNode; 35 36 import jdk.vm.ci.meta.Assumptions; 37 import jdk.vm.ci.meta.ConstantReflectionProvider; 38 import jdk.vm.ci.meta.ResolvedJavaType; 39 40 /** 41 * A {@link PiNode} where the type is not yet known. If the type becomes known at a later point in 42 * the compilation, this can canonicalize to a regular {@link PiNode}. 43 */ 44 @NodeInfo 45 public final class DynamicPiNode extends PiNode { 46 47 public static final NodeClass<DynamicPiNode> TYPE = NodeClass.create(DynamicPiNode.class); 48 @Input ValueNode typeMirror; 49 private final boolean exact; 50 DynamicPiNode(ValueNode object, GuardingNode guard, ValueNode typeMirror, boolean exact)51 protected DynamicPiNode(ValueNode object, GuardingNode guard, ValueNode typeMirror, boolean exact) { 52 super(TYPE, object, StampFactory.object(), guard); 53 this.typeMirror = typeMirror; 54 this.exact = exact; 55 } 56 create(Assumptions assumptions, ConstantReflectionProvider constantReflection, ValueNode object, GuardingNode guard, ValueNode typeMirror, boolean exact)57 public static ValueNode create(Assumptions assumptions, ConstantReflectionProvider constantReflection, ValueNode object, GuardingNode guard, ValueNode typeMirror, boolean exact) { 58 ValueNode synonym = findSynonym(assumptions, constantReflection, object, guard, typeMirror, exact); 59 if (synonym != null) { 60 return synonym; 61 } 62 return new DynamicPiNode(object, guard, typeMirror, exact); 63 } 64 create(Assumptions assumptions, ConstantReflectionProvider constantReflection, ValueNode object, GuardingNode guard, ValueNode typeMirror)65 public static ValueNode create(Assumptions assumptions, ConstantReflectionProvider constantReflection, ValueNode object, GuardingNode guard, ValueNode typeMirror) { 66 return create(assumptions, constantReflection, object, guard, typeMirror, false); 67 } 68 isExact()69 public boolean isExact() { 70 return exact; 71 } 72 findSynonym(Assumptions assumptions, ConstantReflectionProvider constantReflection, ValueNode object, GuardingNode guard, ValueNode typeMirror, boolean exact)73 private static ValueNode findSynonym(Assumptions assumptions, ConstantReflectionProvider constantReflection, ValueNode object, GuardingNode guard, ValueNode typeMirror, boolean exact) { 74 if (typeMirror.isConstant()) { 75 ResolvedJavaType t = constantReflection.asJavaType(typeMirror.asConstant()); 76 if (t != null) { 77 Stamp staticPiStamp; 78 if (t.isPrimitive()) { 79 staticPiStamp = StampFactory.alwaysNull(); 80 } else { 81 TypeReference type = exact ? TypeReference.createExactTrusted(t) : TypeReference.createTrusted(assumptions, t); 82 staticPiStamp = StampFactory.object(type); 83 } 84 85 return PiNode.create(object, staticPiStamp, (ValueNode) guard); 86 } 87 } 88 89 return null; 90 } 91 92 @Override canonical(CanonicalizerTool tool)93 public Node canonical(CanonicalizerTool tool) { 94 ValueNode synonym = findSynonym(tool.getAssumptions(), tool.getConstantReflection(), object, guard, typeMirror, exact); 95 if (synonym != null) { 96 return synonym; 97 } 98 return this; 99 } 100 } 101