content: /*
   * Copyright (C) 2015 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  public class Main {
    public static void foo(Object o, int a) {
      Object result = null;
      if (o instanceof Main) {
        // The compiler optimizes the type of `o` by introducing
        // a `HBoundType` in this block.
        while (a != 3) {
          if (a == 2) {
            a++;
            result = o;
            continue;
          } else if (willInline()) {
            // This block will be detected as dead after inlining.
            result = new Object();
            continue;
          }
          result = new Object();
        }
        // The compiler produces a phi at the back edge for `result`.
        // Before dead block elimination, the phi has three inputs:
        // result = (new Object(), new Object(), HBoundType)
        //
        // After dead block elimination, the phi has now two inputs:
        // result = (new Object(), HBoundType)
        //
        // Our internal data structure for linking users and inputs expect
        // the input index stored in that data structure to be the index
        // in the inputs array. So the index before dead block elimination
        // of the `HBoundType` would be 2. Dead block elimination must update
        // that index to be 1.
      }
      System.out.println(result.getClass());
    }
  
    public static boolean willInline() {
      return false;
    }
  
    public static void main(String[] args) {
      foo(new Main(), 2);
    }
  }
  