src/test/java/com/android/tools/r8/ir/optimize/string/StringBuilderWithEscapingPhiOperandThroughAssignSideEffectTest.java

// Copyright (c) 2023, 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.ir.optimize.string;

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 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;

/** This is a reproduction of b/280958704. */
@RunWith(Parameterized.class)
public class StringBuilderWithEscapingPhiOperandThroughAssignSideEffectTest extends TestBase {

  private final String EXPECTED = "(Hello World)";

  @Parameter(0)
  public TestParameters parameters;

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

  @Test
  public void testJvm() throws Exception {
    parameters.assumeJvmTestParameters();
    testForJvm(parameters)
        .addProgramClasses(Main.class)
        .run(parameters.getRuntime(), Main.class, "Hello World")
        .assertSuccessWithOutputLines(EXPECTED);
  }

  @Test
  public void testD8Debug() throws Exception {
    parameters.assumeDexRuntime();
    testForD8(parameters.getBackend())
        .addInnerClasses(getClass())
        .debug()
        .setMinApi(parameters)
        .run(parameters.getRuntime(), Main.class, "Hello World")
        .assertSuccessWithOutputLines(EXPECTED);
  }

  @Test
  public void testD8Release() throws Exception {
    parameters.assumeDexRuntime();
    testForD8(parameters.getBackend())
        .addInnerClasses(getClass())
        .release()
        .setMinApi(parameters)
        .run(parameters.getRuntime(), Main.class, "Hello World")
        .assertSuccessWithOutputLines(EXPECTED);
  }

  @Test
  public void testR8() throws Exception {
    testForR8(parameters.getBackend())
        .addInnerClasses(getClass())
        .addKeepMainRule(Main.class)
        .enableInliningAnnotations()
        .setMinApi(parameters)
        .run(parameters.getRuntime(), Main.class, "Hello World")
        .assertSuccessWithOutputLines(EXPECTED);
  }

  static class Main {

    static StringBuilder escape;

    public static void main(String[] args) {
      addString(args[0]);
      System.out.println(escape);
    }

    @NeverInline
    private static void addString(CharSequence sequence) {
      StringBuilder sb = escape;
      if (sb == null) {
        sb = escape = new StringBuilder();
      }
      sb.append("(").append(sequence).append(")");
    }
  }
}