1 /* 2 * Copyright (c) 2016, 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 package org.graalvm.compiler.nodes; 24 25 import org.graalvm.compiler.core.common.type.Stamp; 26 import org.graalvm.compiler.core.common.type.StampFactory; 27 import org.graalvm.compiler.core.common.type.TypeReference; 28 import org.graalvm.compiler.graph.Node; 29 import org.graalvm.compiler.graph.NodeClass; 30 import org.graalvm.compiler.graph.spi.CanonicalizerTool; 31 import org.graalvm.compiler.nodeinfo.NodeInfo; 32 import org.graalvm.compiler.nodes.extended.GuardingNode; 33 34 import jdk.vm.ci.meta.ResolvedJavaType; 35 36 /** 37 * A {@link PiNode} where the type is not yet known. If the type becomes known at a later point in 38 * the compilation, this can canonicalize to a regular {@link PiNode}. 39 */ 40 @NodeInfo 41 public final class DynamicPiNode extends PiNode { 42 43 public static final NodeClass<DynamicPiNode> TYPE = NodeClass.create(DynamicPiNode.class); 44 @Input ValueNode typeMirror; 45 46 public DynamicPiNode(ValueNode object, GuardingNode guard, ValueNode typeMirror) { 47 super(TYPE, object, StampFactory.object(), guard); 48 this.typeMirror = typeMirror; 49 } 50 51 @Override 52 public Node canonical(CanonicalizerTool tool) { 53 if (typeMirror.isConstant()) { 54 ResolvedJavaType t = tool.getConstantReflection().asJavaType(typeMirror.asConstant()); 55 if (t != null) { 56 Stamp staticPiStamp; 57 if (t.isPrimitive()) { 58 staticPiStamp = StampFactory.alwaysNull(); 59 } else { 60 TypeReference type = TypeReference.createTrusted(tool.getAssumptions(), t); 61 staticPiStamp = StampFactory.object(type); 62 } 63 64 return new PiNode(object(), staticPiStamp, (ValueNode) getGuard()).canonical(tool); 65 } 66 } 67 68 return this; 69 } 70 }