1 /* 2 * Copyright (c) 2014, 2014, 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.hotspot.word; 24 25 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_0; 26 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_0; 27 28 import org.graalvm.compiler.core.common.type.Stamp; 29 import org.graalvm.compiler.graph.Node; 30 import org.graalvm.compiler.graph.NodeClass; 31 import org.graalvm.compiler.hotspot.word.HotSpotOperation.HotspotOpcode; 32 import org.graalvm.compiler.nodeinfo.NodeInfo; 33 import org.graalvm.compiler.nodes.ValueNode; 34 import org.graalvm.compiler.nodes.calc.FloatingNode; 35 import org.graalvm.compiler.nodes.spi.LIRLowerable; 36 import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool; 37 38 import jdk.vm.ci.meta.Value; 39 40 /** 41 * Cast between Word and metaspace pointers exposed by the {@link HotspotOpcode#FROM_POINTER} and 42 * {@link HotspotOpcode#TO_KLASS_POINTER} operations. 43 */ 44 @NodeInfo(cycles = CYCLES_0, size = SIZE_0) 45 public final class PointerCastNode extends FloatingNode implements LIRLowerable, Node.ValueNumberable { 46 47 public static final NodeClass<PointerCastNode> TYPE = NodeClass.create(PointerCastNode.class); 48 @Input ValueNode input; 49 50 public PointerCastNode(Stamp stamp, ValueNode input) { 51 super(TYPE, stamp); 52 this.input = input; 53 } 54 55 public ValueNode getInput() { 56 return input; 57 } 58 59 @Override 60 public void generate(NodeLIRBuilderTool generator) { 61 Value value = generator.operand(input); 62 assert value.getValueKind().equals(generator.getLIRGeneratorTool().getLIRKind(stamp())) : "PointerCastNode shouldn't change the LIRKind"; 63 64 generator.setResult(this, value); 65 } 66 }