src/test/java/com/android/tools/r8/optimize/argumentpropagation/FieldStateWithCastArgumentPropagationTest.java

// Copyright (c) 2024, the R8 project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
package com.android.tools.r8.optimize.argumentpropagation;

import static com.android.tools.r8.utils.codeinspector.Matchers.isPresent;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.junit.Assert.assertEquals;

import com.android.tools.r8.NeverClassInline;
import com.android.tools.r8.NeverInline;
import com.android.tools.r8.TestBase;
import com.android.tools.r8.TestParameters;
import com.android.tools.r8.TestParametersCollection;
import com.android.tools.r8.utils.codeinspector.ClassSubject;
import com.android.tools.r8.utils.codeinspector.MethodSubject;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameter;
import org.junit.runners.Parameterized.Parameters;

@RunWith(Parameterized.class)
public class FieldStateWithCastArgumentPropagationTest extends TestBase {

  @Parameter(0)
  public TestParameters parameters;

  @Parameters(name = "{0}")
  public static TestParametersCollection data() {
    return getTestParameters().withAllRuntimesAndApiLevels().build();
  }

  @Test
  public void test() throws Exception {
    testForR8(parameters.getBackend())
        .addInnerClasses(getClass())
        .addKeepMainRule(Main.class)
        .enableInliningAnnotations()
        .enableNeverClassInliningAnnotations()
        .setMinApi(parameters)
        .compile()
        .inspect(
            inspector -> {
              ClassSubject mainClassSubject = inspector.clazz(Main.class);
              assertThat(mainClassSubject, isPresent());

              MethodSubject printMethodSubject =
                  mainClassSubject.uniqueMethodWithOriginalName("print");
              assertThat(printMethodSubject, isPresent());
              assertEquals("java.lang.String", printMethodSubject.getParameter(0).getTypeName());
            })
        .run(parameters.getRuntime(), Main.class)
        .assertSuccessWithOutputLines("Hello, world!");
  }

  static class Main {

    public static void main(String[] args) {
      try {
        new A(new Object());
      } catch (ClassCastException e) {
        System.out.print("Hello");
      }
      A a = System.currentTimeMillis() > 0 ? new A(", world!") : new A("unreachable");
      print(a.f);
    }

    @NeverInline
    private static void print(Object o) {
      System.out.println(o);
    }
  }

  @NeverClassInline
  static class A {

    private Object f;

    A(Object o) {
      f = (String) o;
    }
  }
}