| // Copyright (c) 2022, 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 static com.android.tools.r8.ir.optimize.string.utils.StringBuilderCodeMatchers.isInvokeStringBuilderAppendWithString; |
| import static org.junit.Assert.assertEquals; |
| |
| 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.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 StringBuilderWithIndirectPhiReadThroughPhiOperandNewInstanceTest 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) |
| .setMinApi(parameters.getApiLevel()) |
| .compile() |
| .inspect( |
| inspector -> { |
| MethodSubject mainMethodSubject = inspector.clazz(Main.class).mainMethod(); |
| assertEquals( |
| 2, |
| mainMethodSubject |
| .streamInstructions() |
| .filter(isInvokeStringBuilderAppendWithString()) |
| .count()); |
| }) |
| .run(parameters.getRuntime(), Main.class) |
| .assertSuccessWithOutputLines("foobar", "foo"); |
| } |
| |
| static class Main { |
| |
| public static void main(String[] args) { |
| boolean alwaysTrue = System.currentTimeMillis() > 0; |
| StringBuilder sb0 = new StringBuilder(); |
| StringBuilder sb1 = alwaysTrue ? sb0 : new StringBuilder(); |
| sb1.append("foo"); |
| StringBuilder sb2 = new StringBuilder(sb0); |
| sb1.append("bar"); |
| System.out.println(sb1.toString()); |
| System.out.println(sb2.toString()); |
| } |
| } |
| } |