| // 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.ir.optimize.membervaluepropagation; |
| |
| 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.NeverClassInline; |
| import com.android.tools.r8.NeverInline; |
| import com.android.tools.r8.NeverReprocessMethod; |
| import com.android.tools.r8.TestBase; |
| import com.android.tools.r8.TestParameters; |
| import com.android.tools.r8.TestParametersCollection; |
| import com.android.tools.r8.graph.DexEncodedMethod; |
| import com.android.tools.r8.utils.IterableUtils; |
| import com.android.tools.r8.utils.codeinspector.ClassSubject; |
| import com.android.tools.r8.utils.codeinspector.CodeInspector; |
| import java.util.Collection; |
| import java.util.function.Function; |
| import java.util.function.Predicate; |
| 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 FieldWriteBeforeFieldReadTest extends TestBase { |
| |
| private final TestParameters parameters; |
| |
| @Parameters(name = "{0}") |
| public static TestParametersCollection data() { |
| return getTestParameters().withAllRuntimesAndApiLevels().build(); |
| } |
| |
| public FieldWriteBeforeFieldReadTest(TestParameters parameters) { |
| this.parameters = parameters; |
| } |
| |
| @Test |
| public void test() throws Exception { |
| testForR8(parameters.getBackend()) |
| .addInnerClasses(FieldWriteBeforeFieldReadTest.class) |
| .addKeepMainRule(TestClass.class) |
| .addOptionsModification( |
| options -> { |
| options.testing.waveModifier = |
| (waves) -> { |
| Function<String, Predicate<Collection<DexEncodedMethod>>> wavePredicate = |
| methodName -> |
| wave -> |
| wave.stream() |
| .anyMatch( |
| method -> |
| method.method.toSourceString().contains(methodName)); |
| int readFieldsWaveIndex = |
| IterableUtils.firstIndexMatching(waves, wavePredicate.apply("readFields")); |
| assertTrue(readFieldsWaveIndex >= 0); |
| int writeFieldsWaveIndex = |
| IterableUtils.firstIndexMatching(waves, wavePredicate.apply("writeFields")); |
| assertTrue(writeFieldsWaveIndex >= 0); |
| assertTrue(writeFieldsWaveIndex < readFieldsWaveIndex); |
| }; |
| }) |
| .enableInliningAnnotations() |
| .enableNeverClassInliningAnnotations() |
| .enableNeverReprocessMethodAnnotations() |
| .setMinApi(parameters.getApiLevel()) |
| .compile() |
| .inspect(this::inspect) |
| .run(parameters.getRuntime(), TestClass.class) |
| .assertSuccessWithOutputLines("Live!"); |
| } |
| |
| private void inspect(CodeInspector inspector) { |
| ClassSubject testClassSubject = inspector.clazz(TestClass.class); |
| assertThat(testClassSubject, isPresent()); |
| assertThat(testClassSubject.uniqueMethodWithName("live"), isPresent()); |
| assertThat(testClassSubject.uniqueMethodWithName("dead"), not(isPresent())); |
| } |
| |
| static class TestClass { |
| |
| static boolean alwaysFalse; |
| |
| public static void main(String[] args) { |
| A obj = new A(); |
| writeFields(obj); |
| readFields(obj); |
| } |
| |
| @NeverInline |
| static void writeFields(A obj) { |
| alwaysFalse = false; |
| obj.alwaysFalse = false; |
| increaseDistanceToNearestLeaf(); |
| } |
| |
| static void increaseDistanceToNearestLeaf() {} |
| |
| @NeverInline |
| @NeverReprocessMethod |
| static void readFields(A obj) { |
| if (alwaysFalse || obj.alwaysFalse) { |
| dead(); |
| } else { |
| live(); |
| } |
| } |
| |
| @NeverInline |
| static void live() { |
| System.out.println("Live!"); |
| } |
| |
| @NeverInline |
| static void dead() { |
| System.out.println("Dead!"); |
| } |
| } |
| |
| @NeverClassInline |
| static class A { |
| |
| boolean alwaysFalse; |
| } |
| } |