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      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 public class Main {
     18 
     19   /// CHECK-START: void Main.testRedundantPhiCycle(boolean) builder (after)
     20   /// CHECK-NOT:  Phi
     21   private void testRedundantPhiCycle(boolean cond) {
     22     Object o = null;
     23     while (true) {
     24       if (cond) {
     25         o = null;
     26       }
     27       System.out.println(o);
     28     }
     29   }
     30 
     31   /// CHECK-START: void Main.testLoopPhisWithNullAndCrossUses(boolean) builder (after)
     32   /// CHECK-NOT:  Phi
     33   private void testLoopPhisWithNullAndCrossUses(boolean cond) {
     34     Main a = null;
     35     Main b = null;
     36     while (a == null) {
     37       if (cond) {
     38         a = b;
     39       } else {
     40         b = a;
     41       }
     42     }
     43   }
     44 
     45   public static void main(String[] args) {
     46   }
     47 }
     48