| // Copyright (c) 2019, 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.deadcode; |
| |
| import static com.android.tools.r8.utils.codeinspector.Matchers.isPresent; |
| import static org.hamcrest.MatcherAssert.assertThat; |
| import static org.junit.Assert.assertTrue; |
| |
| 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.CodeInspector; |
| import com.android.tools.r8.utils.codeinspector.InstructionSubject; |
| 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.Parameters; |
| |
| @RunWith(Parameterized.class) |
| public class RemoveDeadBuildersTest extends TestBase { |
| |
| private final TestParameters parameters; |
| |
| @Parameters(name = "{0}") |
| public static TestParametersCollection data() { |
| return getTestParameters().withAllRuntimes().build(); |
| } |
| |
| public RemoveDeadBuildersTest(TestParameters parameters) { |
| this.parameters = parameters; |
| } |
| |
| @Test |
| public void test() throws Exception { |
| CodeInspector inspector = |
| testForR8(parameters.getBackend()) |
| .addProgramClasses(TestClass.class) |
| .addKeepMainRule(TestClass.class) |
| .compile() |
| .inspector(); |
| |
| ClassSubject classSubject = inspector.clazz(TestClass.class); |
| assertThat(classSubject, isPresent()); |
| |
| MethodSubject methodSubject = classSubject.mainMethod(); |
| assertThat(methodSubject, isPresent()); |
| assertTrue(methodSubject.streamInstructions().noneMatch(InstructionSubject::isNewInstance)); |
| } |
| |
| static class TestClass { |
| |
| public static void main(String[] args) { |
| new StringBuffer(); |
| new StringBuffer("Hello world!"); |
| new StringBuffer((CharSequence) "Hello world!"); |
| new StringBuffer(42); |
| new StringBuilder(); |
| new StringBuilder("Hello world!"); |
| new StringBuilder((CharSequence) "Hello world!"); |
| new StringBuilder(42); |
| } |
| } |
| } |