1 /* 2 * Copyright (c) 2012, 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.hotspot.nodes; 26 27 import static org.graalvm.compiler.core.common.NumUtil.roundUp; 28 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_2; 29 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_1; 30 31 import java.util.BitSet; 32 33 import org.graalvm.compiler.core.common.type.StampFactory; 34 import org.graalvm.compiler.graph.NodeClass; 35 import org.graalvm.compiler.lir.VirtualStackSlot; 36 import org.graalvm.compiler.lir.gen.LIRGeneratorTool; 37 import org.graalvm.compiler.nodeinfo.NodeInfo; 38 import org.graalvm.compiler.nodes.FixedWithNextNode; 39 import org.graalvm.compiler.nodes.spi.LIRLowerable; 40 import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool; 41 import org.graalvm.compiler.word.Word; 42 import org.graalvm.compiler.word.WordTypes; 43 44 import jdk.vm.ci.meta.Value; 45 46 /** 47 * Intrinsic for allocating an on-stack array of integers to hold the dimensions of a multianewarray 48 * instruction. 49 */ 50 @NodeInfo(cycles = CYCLES_2, size = SIZE_1) 51 public final class DimensionsNode extends FixedWithNextNode implements LIRLowerable { 52 53 public static final NodeClass<DimensionsNode> TYPE = NodeClass.create(DimensionsNode.class); 54 protected final int rank; 55 56 public DimensionsNode(@InjectedNodeParameter WordTypes wordTypes, int rank) { 57 super(TYPE, StampFactory.forKind(wordTypes.getWordKind())); 58 this.rank = rank; 59 } 60 61 @Override 62 public void generate(NodeLIRBuilderTool gen) { 63 LIRGeneratorTool lirGen = gen.getLIRGeneratorTool(); 64 int size = rank * 4; 65 int wordSize = lirGen.target().wordSize; 66 int slots = roundUp(size, wordSize) / wordSize; 67 VirtualStackSlot array = lirGen.getResult().getFrameMapBuilder().allocateStackSlots(slots, new BitSet(0), null); 68 Value result = lirGen.emitAddress(array); 69 gen.setResult(this, result); 70 } 71 72 @NodeIntrinsic 73 public static native Word allocaDimsArray(@ConstantNodeParameter int rank); 74 }