1 /* 2 * Copyright (c) 2015, 2019, 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 static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_1; 28 29 import org.graalvm.compiler.core.common.type.StampFactory; 30 import org.graalvm.compiler.graph.NodeClass; 31 import org.graalvm.compiler.nodeinfo.NodeInfo; 32 import org.graalvm.compiler.nodeinfo.NodeSize; 33 import org.graalvm.compiler.nodes.calc.SignExtendNode; 34 import org.graalvm.compiler.nodes.debug.ControlFlowAnchored; 35 import org.graalvm.compiler.nodes.spi.Lowerable; 36 import org.graalvm.compiler.nodes.spi.LoweringTool; 37 38 import jdk.vm.ci.meta.JavaKind; 39 40 /** 41 * A high-level intrinsic for getting an address inside of an object. During lowering it will be 42 * moved next to any uses to avoid creating a derived pointer that is live across a safepoint. 43 */ 44 @NodeInfo(cycles = CYCLES_1, size = NodeSize.SIZE_1) 45 public final class ComputeObjectAddressNode extends FixedWithNextNode implements Lowerable, ControlFlowAnchored { 46 public static final NodeClass<ComputeObjectAddressNode> TYPE = NodeClass.create(ComputeObjectAddressNode.class); 47 48 @Input ValueNode object; 49 @Input ValueNode offset; 50 51 public ComputeObjectAddressNode(ValueNode obj, ValueNode offset) { 52 super(TYPE, StampFactory.forKind(JavaKind.Long)); 53 this.object = obj; 54 this.offset = SignExtendNode.create(offset, 64, NodeView.DEFAULT); 55 } 56 57 @NodeIntrinsic 58 public static native long get(Object array, long offset); 59 60 @Override 61 public void lower(LoweringTool tool) { 62 tool.getLowerer().lower(this, tool); 63 } 64 65 public ValueNode getObject() { 66 return object; 67 } 68 69 public ValueNode getOffset() { 70 return offset; 71 } 72 }