1 /*
   2  * Copyright (c) 2016, 2017, 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.calc;
  24 
  25 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_32;
  26 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_1;
  27 
  28 import org.graalvm.compiler.core.common.type.IntegerStamp;
  29 import org.graalvm.compiler.core.common.type.Stamp;
  30 import org.graalvm.compiler.graph.NodeClass;
  31 import org.graalvm.compiler.nodeinfo.NodeInfo;
  32 import org.graalvm.compiler.nodes.NodeView;
  33 import org.graalvm.compiler.nodes.ValueNode;
  34 import org.graalvm.compiler.nodes.spi.Lowerable;
  35 import org.graalvm.compiler.nodes.spi.LoweringTool;
  36 
  37 @NodeInfo(cycles = CYCLES_32, size = SIZE_1)
  38 public abstract class IntegerDivRemNode extends FixedBinaryNode implements Lowerable {
  39 
  40     public static final NodeClass<IntegerDivRemNode> TYPE = NodeClass.create(IntegerDivRemNode.class);
  41 
  42     public enum Op {
  43         DIV,
  44         REM
  45     }
  46 
  47     public enum Type {
  48         SIGNED,
  49         UNSIGNED
  50     }
  51 
  52     private final Op op;
  53     private final Type type;
  54     private final boolean canDeopt;
  55 
  56     protected IntegerDivRemNode(NodeClass<? extends IntegerDivRemNode> c, Stamp stamp, Op op, Type type, ValueNode x, ValueNode y) {
  57         super(c, stamp, x, y);
  58         this.op = op;
  59         this.type = type;
  60 
  61         // Assigning canDeopt during constructor, because it must never change during lifetime of
  62         // the node.
  63         IntegerStamp yStamp = (IntegerStamp) getY().stamp(NodeView.DEFAULT);
  64         this.canDeopt = yStamp.contains(0) || yStamp.contains(-1);
  65     }
  66 
  67     public final Op getOp() {
  68         return op;
  69     }
  70 
  71     public final Type getType() {
  72         return type;
  73     }
  74 
  75     @Override
  76     public void lower(LoweringTool tool) {
  77         tool.getLowerer().lower(this, tool);
  78     }
  79 
  80     @Override
  81     public boolean canDeoptimize() {
  82         return canDeopt;
  83     }
  84 }