1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 final class Final { toString()18 public String toString() { 19 return "final"; 20 } 21 } 22 23 public class Main { 24 /// CHECK-START: Final Main.testKeepCheckCast(java.lang.Object, boolean) builder (after) 25 /// CHECK: <<Phi:l\d+>> Phi klass:java.lang.Object 26 /// CHECK: <<Class:l\d+>> LoadClass 27 /// CHECK: CheckCast [<<Phi>>,<<Class>>] 28 /// CHECK: <<Ret:l\d+>> BoundType [<<Phi>>] klass:Final 29 /// CHECK: Return [<<Ret>>] 30 31 /// CHECK-START: Final Main.testKeepCheckCast(java.lang.Object, boolean) instruction_simplifier (after) 32 /// CHECK: <<Phi:l\d+>> Phi 33 /// CHECK: <<Class:l\d+>> LoadClass 34 /// CHECK: CheckCast [<<Phi>>,<<Class>>] 35 /// CHECK: <<Ret:l\d+>> BoundType [<<Phi>>] 36 /// CHECK: Return [<<Ret>>] testKeepCheckCast(Object o, boolean cond)37 public static Final testKeepCheckCast(Object o, boolean cond) { 38 Object x = new Final(); 39 while (cond) { 40 x = o; 41 cond = false; 42 } 43 return (Final) x; 44 } 45 46 /// CHECK-START: void Main.testKeepInstanceOf(java.lang.Object, boolean) builder (after) 47 /// CHECK: <<Phi:l\d+>> Phi klass:java.lang.Object 48 /// CHECK: <<Class:l\d+>> LoadClass 49 /// CHECK: InstanceOf [<<Phi>>,<<Class>>] 50 51 /// CHECK-START: void Main.testKeepInstanceOf(java.lang.Object, boolean) dead_code_elimination$initial (after) 52 /// CHECK: <<Phi:l\d+>> Phi 53 /// CHECK: <<Class:l\d+>> LoadClass 54 /// CHECK: InstanceOf [<<Phi>>,<<Class>>] testKeepInstanceOf(Object o, boolean cond)55 public static void testKeepInstanceOf(Object o, boolean cond) { 56 Object x = new Final(); 57 while (cond) { 58 x = o; 59 cond = false; 60 } 61 if (x instanceof Final) { 62 System.out.println("instanceof succeed"); 63 } else { 64 System.out.println("instanceof failed"); 65 } 66 } 67 68 /// CHECK-START: java.lang.String Main.testNoInline(java.lang.Object, boolean) builder (after) 69 /// CHECK: <<Phi:l\d+>> Phi klass:java.lang.Object 70 /// CHECK: <<NC:l\d+>> NullCheck [<<Phi>>] 71 /// CHECK: <<Ret:l\d+>> InvokeVirtual [<<NC>>] method_name:java.lang.Object.toString 72 /// CHECK: Return [<<Ret>>] 73 74 /// CHECK-START: java.lang.String Main.testNoInline(java.lang.Object, boolean) inliner (after) 75 /// CHECK: <<Phi:l\d+>> Phi 76 /// CHECK: <<NC:l\d+>> NullCheck [<<Phi>>] 77 /// CHECK: <<Ret:l\d+>> InvokeVirtual [<<NC>>] method_name:java.lang.Object.toString 78 /// CHECK: Return [<<Ret>>] testNoInline(Object o, boolean cond)79 public static String testNoInline(Object o, boolean cond) { 80 Object x = new Final(); 81 while (cond) { 82 x = o; 83 cond = false; 84 } 85 return x.toString(); 86 } 87 main(String[] args)88 public static void main(String[] args) { 89 try { 90 testKeepCheckCast(new Object(), true); 91 throw new Error("Expected check cast exception"); 92 } catch (ClassCastException e) { 93 // expected 94 } 95 96 testKeepInstanceOf(new Object(), true); 97 98 if ("final".equals(testNoInline(new Object(), true))) { 99 throw new Error("Bad inlining"); 100 } 101 } 102 } 103