1 /* 2 * Copyright (c) 2016, 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.calc; 26 27 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_32; 28 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_1; 29 30 import org.graalvm.compiler.core.common.type.IntegerStamp; 31 import org.graalvm.compiler.core.common.type.Stamp; 32 import org.graalvm.compiler.graph.IterableNodeType; 33 import org.graalvm.compiler.graph.NodeClass; 34 import org.graalvm.compiler.nodeinfo.InputType; 35 import org.graalvm.compiler.nodeinfo.NodeInfo; 36 import org.graalvm.compiler.nodes.NodeView; 37 import org.graalvm.compiler.nodes.ValueNode; 38 import org.graalvm.compiler.nodes.extended.GuardingNode; 39 import org.graalvm.compiler.nodes.spi.Lowerable; 40 import org.graalvm.compiler.nodes.spi.LoweringTool; 41 42 @NodeInfo(cycles = CYCLES_32, size = SIZE_1) 43 public abstract class IntegerDivRemNode extends FixedBinaryNode implements Lowerable, IterableNodeType { 44 45 public static final NodeClass<IntegerDivRemNode> TYPE = NodeClass.create(IntegerDivRemNode.class); 46 47 public enum Op { 48 DIV, 49 REM 50 } 51 52 public enum Type { 53 SIGNED, 54 UNSIGNED 55 } 56 57 @OptionalInput(InputType.Guard) private GuardingNode zeroCheck; 58 59 private final Op op; 60 private final Type type; 61 private final boolean canDeopt; 62 63 protected IntegerDivRemNode(NodeClass<? extends IntegerDivRemNode> c, Stamp stamp, Op op, Type type, ValueNode x, ValueNode y, GuardingNode zeroCheck) { 64 super(c, stamp, x, y); 65 this.zeroCheck = zeroCheck; 66 this.op = op; 67 this.type = type; 68 69 // Assigning canDeopt during constructor, because it must never change during lifetime of 70 // the node. 71 IntegerStamp yStamp = (IntegerStamp) getY().stamp(NodeView.DEFAULT); 72 this.canDeopt = (yStamp.contains(0) && zeroCheck == null) || yStamp.contains(-1); 73 } 74 75 public final GuardingNode getZeroCheck() { 76 return zeroCheck; 77 } 78 79 public final Op getOp() { 80 return op; 81 } 82 83 public final Type getType() { 84 return type; 85 } 86 87 @Override 88 public void lower(LoweringTool tool) { 89 tool.getLowerer().lower(this, tool); 90 } 91 92 @Override 93 public boolean canDeoptimize() { 94 return canDeopt; 95 } 96 }