1 /*
   2  * Copyright (c) 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.java;
  26 
  27 import jdk.vm.ci.meta.ResolvedJavaMethod;
  28 import jdk.vm.ci.meta.SpeculationLog.SpeculationReason;
  29 
  30 public final class IntegerExactOpSpeculation implements SpeculationReason {
  31 
  32     public enum IntegerExactOp {
  33         INTEGER_ADD_EXACT,
  34         INTEGER_INCREMENT_EXACT,
  35         INTEGER_SUBTRACT_EXACT,
  36         INTEGER_DECREMENT_EXACT,
  37         INTEGER_MULTIPLY_EXACT
  38     }
  39 
  40     protected final String methodDescriptor;
  41     protected final IntegerExactOp op;
  42 
  43     public IntegerExactOpSpeculation(ResolvedJavaMethod method, IntegerExactOp op) {
  44         this.methodDescriptor = method.format("%H.%n(%p)%R");
  45         this.op = op;
  46     }
  47 
  48     @Override
  49     public int hashCode() {
  50         return methodDescriptor.hashCode() * 31 + op.ordinal();
  51     }
  52 
  53     @Override
  54     public boolean equals(Object obj) {
  55         if (obj instanceof IntegerExactOpSpeculation) {
  56             IntegerExactOpSpeculation other = (IntegerExactOpSpeculation) obj;
  57             return op.equals(other.op) && methodDescriptor.equals(other.methodDescriptor);
  58         }
  59         return false;
  60     }
  61 
  62 }