test/481-regression-phi-cond/src/Main.java

/*
 * 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 assertBooleanEquals(boolean expected, boolean result) {
    if (expected != result) {
      throw new Error("Expected: " + expected + ", found: " + result);
    }
  }

  public static boolean inlinePhi(boolean x, boolean y, boolean z) {
    boolean phi;
    if (z) {
      phi = x;
    } else {
      phi = y;
    }
    return phi;
  }

  public static boolean dontUseParam(boolean x) {
    return false;
  }

  public static boolean testCase(boolean x, boolean y, boolean z) {
    // First create a Phi(x, y).
    boolean phi = inlinePhi(x, y, z);
    // Now use the phi as a condition which the boolean simplifier will try to
    // optimize out. If the result is not used, the algorithm will try to remove
    // the original condition (phi) and crash.
    return dontUseParam(phi == false ? false : true);
  }

  public static void main(String[] args) {
    assertBooleanEquals(false, testCase(true, true, true));
  }
}