| // Copyright (c) 2020, 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.classmerging.vertical; |
| |
| 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; |
| |
| @RunWith(Parameterized.class) |
| public class LambdaRewritingTest extends TestBase { |
| |
| private final TestParameters parameters; |
| |
| @Parameterized.Parameters(name = "{0}") |
| public static TestParametersCollection data() { |
| return getTestParameters().withAllRuntimesAndApiLevels().build(); |
| } |
| |
| public LambdaRewritingTest(TestParameters parameters) { |
| this.parameters = parameters; |
| } |
| |
| @Test |
| public void test() throws Exception { |
| testForR8(parameters.getBackend()) |
| .addInnerClasses(getClass()) |
| .addKeepMainRule(Main.class) |
| .addVerticallyMergedClassesInspector( |
| inspector -> inspector.assertMergedIntoSubtype(Interface.class)) |
| .enableInliningAnnotations() |
| .setMinApi(parameters.getApiLevel()) |
| .compile() |
| .run(parameters.getRuntime(), Main.class); |
| } |
| |
| public static class Main { |
| |
| public static void main(String[] args) { |
| Interface obj = new InterfaceImpl(); |
| |
| // Leads to an invoke-custom instruction that mentions the type of `obj` since it is captured. |
| invoke(() -> obj.foo()); |
| |
| FunctionImpl functionImpl = new FunctionImpl(); |
| if (System.currentTimeMillis() < 0) { |
| System.out.println(functionImpl); |
| } |
| } |
| |
| @NeverInline |
| private static void invoke(Function f) { |
| f.accept(); |
| } |
| } |
| |
| // Cannot be merged as it has two subtypes: FunctionImpl and a lambda. |
| public interface Function { |
| |
| void accept(); |
| } |
| |
| public static class FunctionImpl implements Function { |
| |
| @Override |
| public void accept() { |
| System.out.println("In FunctionImpl.accept()"); |
| } |
| } |
| |
| // Will be merged into InterfaceImpl. |
| public interface Interface { |
| |
| void foo(); |
| } |
| |
| public static class InterfaceImpl implements Interface { |
| |
| @Override |
| public void foo() { |
| System.out.println("In InterfaceImpl.foo()"); |
| } |
| } |
| } |