| // Copyright (c) 2018, 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.instanceofremoval; |
| |
| import static com.android.tools.r8.utils.codeinspector.Matchers.isPresent; |
| import static org.hamcrest.MatcherAssert.assertThat; |
| import static org.hamcrest.core.IsNot.not; |
| import static org.junit.Assert.assertEquals; |
| |
| 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.CodeInspector; |
| import com.android.tools.r8.utils.codeinspector.InstructionSubject; |
| import com.google.common.collect.Streams; |
| 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 UninstantiatedProgramTypeTest extends TestBase { |
| |
| static class A {} |
| |
| static class B extends A {} |
| |
| static class TestClass { |
| |
| public static void main(String[] args) { |
| A obj = getObject(); |
| |
| // Since B is a program class and B is never instantiated directly or indirectly, we can |
| // rewrite the instance-of instruction to the constant false. |
| if (obj instanceof B) { |
| dead(); |
| } else { |
| live(); |
| } |
| } |
| |
| @NeverInline |
| private static A getObject() { |
| return new A(); |
| } |
| |
| @NeverInline |
| private static void live() { |
| System.out.print("In TestClass.live()"); |
| } |
| |
| @NeverInline |
| private static void dead() { |
| System.out.print("In TestClass.dead()"); |
| } |
| } |
| |
| @Parameters(name = "{0}") |
| public static TestParametersCollection data() { |
| return getTestParameters().withAllRuntimes().build(); |
| } |
| |
| private final TestParameters parameters; |
| |
| public UninstantiatedProgramTypeTest(TestParameters parameters) { |
| this.parameters = parameters; |
| } |
| |
| @Test |
| public void test() throws Exception { |
| String expected = "In TestClass.live()"; |
| |
| testForJvm().addTestClasspath().run(TestClass.class).assertSuccessWithOutput(expected); |
| |
| CodeInspector inspector = |
| testForR8(parameters.getBackend()) |
| .addInnerClasses(UninstantiatedProgramTypeTest.class) |
| .addKeepMainRule(TestClass.class) |
| .enableInliningAnnotations() |
| .setMinApi(parameters.getRuntime()) |
| .run(parameters.getRuntime(), TestClass.class) |
| .assertSuccessWithOutput(expected) |
| .inspector(); |
| |
| ClassSubject classSubject = inspector.clazz(TestClass.class); |
| assertThat(classSubject, isPresent()); |
| assertThat(classSubject.method("void", "live"), isPresent()); |
| assertThat(classSubject.method("void", "dead"), not(isPresent())); |
| |
| long numberOfInstanceOfInstructions = |
| Streams.stream( |
| classSubject.mainMethod().iterateInstructions(InstructionSubject::isInstanceOf)) |
| .count(); |
| assertEquals(0, numberOfInstanceOfInstructions); |
| } |
| } |