| // 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.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 static org.junit.Assert.assertTrue; |
| |
| import com.android.tools.r8.NeverInline; |
| import com.android.tools.r8.NoVerticalClassMerging; |
| 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.FoundClassSubject; |
| import com.android.tools.r8.utils.codeinspector.FoundMethodSubject; |
| 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.Parameter; |
| import org.junit.runners.Parameterized.Parameters; |
| |
| @RunWith(Parameterized.class) |
| public class ReturnTypeStrengtheningTest 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() |
| .enableNoVerticalClassMergingAnnotations() |
| // TODO(b/173398086): uniqueMethodWithName() does not work with argument changes. |
| .addDontObfuscate() |
| .setMinApi(parameters.getApiLevel()) |
| .compile() |
| .inspect( |
| inspector -> { |
| ClassSubject mainClassSubject = inspector.clazz(Main.class); |
| assertThat(mainClassSubject, isPresent()); |
| |
| ClassSubject aClassSubject = inspector.clazz(A.class); |
| assertThat(aClassSubject, isPresent()); |
| |
| // Return type of get() should be strengthened to A. |
| MethodSubject getMethodSubject = mainClassSubject.uniqueMethodWithOriginalName("get"); |
| assertThat(getMethodSubject, isPresent()); |
| assertEquals( |
| aClassSubject.getFinalName(), |
| getMethodSubject.getProgramMethod().getReturnType().getTypeName()); |
| |
| // Method consume(I) should be rewritten to consume(A). |
| MethodSubject testBMethodSubject = |
| mainClassSubject.uniqueMethodWithOriginalName("consume"); |
| assertThat(testBMethodSubject, isPresent()); |
| assertEquals( |
| aClassSubject.getFinalName(), |
| testBMethodSubject.getProgramMethod().getParameter(0).getTypeName()); |
| |
| // There should be no casts in the application. |
| for (FoundClassSubject classSubject : inspector.allClasses()) { |
| for (FoundMethodSubject methodSubject : classSubject.allMethods()) { |
| assertTrue( |
| methodSubject |
| .streamInstructions() |
| .noneMatch(InstructionSubject::isCheckCast)); |
| } |
| } |
| }) |
| .run(parameters.getRuntime(), Main.class) |
| .assertSuccessWithOutputLines("A"); |
| } |
| |
| static class Main { |
| |
| public static void main(String[] args) { |
| consume(get()); |
| } |
| |
| @NeverInline |
| static I get() { |
| return new A(); |
| } |
| |
| @NeverInline |
| static void consume(I i) { |
| i.m(); |
| } |
| } |
| |
| @NoVerticalClassMerging |
| interface I { |
| |
| void m(); |
| } |
| |
| static class A implements I { |
| |
| @Override |
| public void m() { |
| System.out.println("A"); |
| } |
| } |
| } |