| // 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.ir.analysis.sideeffect; |
| |
| import static com.android.tools.r8.utils.codeinspector.Matchers.isPresent; |
| import static org.hamcrest.CoreMatchers.not; |
| import static org.hamcrest.MatcherAssert.assertThat; |
| import static org.junit.Assert.assertTrue; |
| |
| 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.graph.DexField; |
| 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 com.google.common.collect.ImmutableList; |
| 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 EnumClassInitializerCanBePostponedTest extends TestBase { |
| |
| private final TestParameters parameters; |
| |
| @Parameters(name = "{0}") |
| public static TestParametersCollection data() { |
| return getTestParameters().withAllRuntimesAndApiLevels().build(); |
| } |
| |
| public EnumClassInitializerCanBePostponedTest(TestParameters parameters) { |
| this.parameters = parameters; |
| } |
| |
| @Test |
| public void test() throws Exception { |
| testForR8(parameters.getBackend()) |
| .addInnerClasses(EnumClassInitializerCanBePostponedTest.class) |
| .addKeepMainRule(TestClass.class) |
| .addOptionsModification(options -> options.testing.enableSwitchToIfRewriting = false) |
| .enableInliningAnnotations() |
| .setMinApi(parameters.getApiLevel()) |
| .compile() |
| .inspect(this::inspect) |
| .run(parameters.getRuntime(), TestClass.class) |
| .assertSuccessWithOutputLines("Hello world!"); |
| } |
| |
| private void inspect(CodeInspector inspector) { |
| ClassSubject classSubject = inspector.clazz(TestClass.class); |
| assertThat(classSubject, isPresent()); |
| assertThat(classSubject.uniqueMethodWithName("dead"), not(isPresent())); |
| |
| for (String methodName : ImmutableList.of("testIf", "testSwitch")) { |
| MethodSubject methodSubject = classSubject.uniqueMethodWithName(methodName); |
| assertThat(methodSubject, isPresent()); |
| |
| // Verify that all enum reads have been removed. |
| assertTrue( |
| methodSubject |
| .streamInstructions() |
| .filter(InstructionSubject::isStaticGet) |
| .map(InstructionSubject::getField) |
| .map(DexField::toSourceString) |
| .allMatch("java.io.PrintStream java.lang.System.out"::equals)); |
| |
| // Verify that there are no more conditional jumps. |
| assertTrue(methodSubject.streamInstructions().noneMatch(InstructionSubject::isIf)); |
| assertTrue(methodSubject.streamInstructions().noneMatch(InstructionSubject::isSwitch)); |
| } |
| |
| assertThat(inspector.clazz(MyEnum.class), not(isPresent())); |
| } |
| |
| static class TestClass { |
| |
| public static void main(String[] args) { |
| testIf(); |
| testSwitch(); |
| } |
| |
| @NeverInline |
| static void testIf() { |
| MyEnum value = MyEnum.A; |
| if (value == MyEnum.A) { |
| System.out.print("Hello"); |
| } else { |
| dead(); |
| } |
| if (value == MyEnum.B) { |
| dead(); |
| } |
| } |
| |
| @NeverInline |
| static void testSwitch() { |
| switch (MyEnum.A) { |
| case A: |
| System.out.println(" world!"); |
| break; |
| |
| case B: |
| dead(); |
| break; |
| |
| default: |
| dead(); |
| break; |
| } |
| } |
| |
| @NeverInline |
| static void dead() { |
| throw new RuntimeException(); |
| } |
| } |
| |
| enum MyEnum { |
| A, |
| B |
| } |
| } |