1 // Copyright (c) 2017, the R8 project authors. Please see the AUTHORS file 2 // for details. All rights reserved. Use of this source code is governed by a 3 // BSD-style license that can be found in the LICENSE file. 4 5 // This code is not run directly. It needs to be compiled to dex code. 6 // 'arithmetic.dex' is what is run. 7 8 package cse; 9 10 public class CommonSubexpressionElimination { 11 divNoCatch(int a, int b, int c)12 public static int divNoCatch(int a, int b, int c) { 13 int d = c / (a - b); 14 System.out.println(d); 15 return c / (a - b); 16 } 17 divNoCatch2(int a, int b, int c)18 public static int divNoCatch2(int a, int b, int c) { 19 int d = c / (a - b); 20 int e = c / (a - b); 21 System.out.println(d + " " + e); 22 return c / (a - b); 23 } 24 divCatch(int a, int b, int c)25 public static int divCatch(int a, int b, int c) { 26 try { 27 int d = c / (a - b); 28 System.out.println(d); 29 return d; 30 } catch (Throwable t) { 31 return c / (a - b); 32 } 33 } 34 divCatch2(int a, int b, int c)35 public static int divCatch2(int a, int b, int c) { 36 try { 37 int d = c / (a - b); 38 int e = c / (a - b); 39 System.out.println(d + " " + e); 40 return d; 41 } catch (Throwable t) { 42 return c / (a - b); 43 } 44 } 45 divCatchCatch(int a, int b, int c)46 public static String divCatchCatch(int a, int b, int c) { 47 try { 48 int d = c / (a - b); 49 System.out.println(d); 50 return "X"; 51 } catch (Throwable t) { 52 try { 53 return "" + c / (a - b); 54 } catch (Throwable t2) { 55 return "A"; 56 } 57 } 58 } 59 divCatchSharedCatchHandler(int a, int b, int c)60 public static String divCatchSharedCatchHandler(int a, int b, int c) { 61 try { 62 int d = c / (a - b); 63 System.out.println(d); 64 if (a == 0) { 65 int e = c / (a - b); 66 System.out.println(e); 67 } else { 68 int f = c / (a - b); 69 System.out.println(f); 70 } 71 return "X"; 72 } catch (Throwable t) { 73 return "B"; 74 } 75 } 76 77 main(String[] args)78 public static void main(String[] args) { 79 System.out.println(divNoCatch(1, 0, 1)); 80 System.out.println(divNoCatch2(1, 0, 2)); 81 System.out.println(divCatch(1, 0, 3)); 82 System.out.println(divCatch2(1, 0, 4)); 83 84 System.out.println(divCatchCatch(0, 0, 1)); 85 System.out.println(divCatchSharedCatchHandler(0, 0, 1)); 86 87 try { 88 divNoCatch(0, 0, 1); 89 throw new RuntimeException("UNEXPECTED"); 90 } catch (ArithmeticException e) { 91 // Expected "divide by zero". 92 } 93 94 try { 95 divNoCatch2(0, 0, 1); 96 throw new RuntimeException("UNEXPECTED"); 97 } catch (ArithmeticException e) { 98 // Expected "divide by zero". 99 } 100 101 try { 102 divCatch(0, 0, 1); 103 throw new RuntimeException("UNEXPECTED"); 104 } catch (ArithmeticException e) { 105 // Expected "divide by zero". 106 } 107 108 try { 109 divCatch2(0, 0, 1); 110 throw new RuntimeException("UNEXPECTED"); 111 } catch (ArithmeticException e) { 112 // Expected "divide by zero". 113 } 114 } 115 } 116