| // 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.assertEquals; |
| |
| 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.FieldSubject; |
| 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; |
| |
| @RunWith(Parameterized.class) |
| public class AssumeInstanceFieldValueTest extends TestBase { |
| |
| private final TestParameters parameters; |
| |
| @Parameterized.Parameters(name = "{0}") |
| public static TestParametersCollection data() { |
| return getTestParameters().withAllRuntimesAndApiLevels().build(); |
| } |
| |
| public AssumeInstanceFieldValueTest(TestParameters parameters) { |
| this.parameters = parameters; |
| } |
| |
| @Test |
| public void test() throws Exception { |
| testForR8(parameters.getBackend()) |
| .addInnerClasses(AssumeInstanceFieldValueTest.class) |
| .addKeepMainRule(TestClass.class) |
| .addKeepRules( |
| "-assumevalues class " + Config.class.getTypeName() + " {", |
| " boolean alwaysTrue return true;", |
| "}", |
| "-assumenosideeffects class " + Config.class.getTypeName() + " {", |
| " boolean alwaysTrueNoSideEffects return true;", |
| "}") |
| .setMinApi(parameters.getApiLevel()) |
| .compile() |
| .inspect(this::inspect) |
| .run(parameters.getRuntime(), TestClass.class) |
| .assertSuccessWithOutputLines("Hello world!"); |
| } |
| |
| private void inspect(CodeInspector inspector) { |
| ClassSubject configClassSubject = inspector.clazz(Config.class); |
| assertThat(configClassSubject, isPresent()); |
| |
| FieldSubject alwaysTrueFieldSubject = configClassSubject.uniqueFieldWithName("alwaysTrue"); |
| assertThat(alwaysTrueFieldSubject, isPresent()); |
| |
| FieldSubject alwaysTrueNoSideEffectsFieldSubject = |
| configClassSubject.uniqueFieldWithName("alwaysTrueNoSideEffects"); |
| assertThat(alwaysTrueNoSideEffectsFieldSubject, not(isPresent())); |
| |
| ClassSubject testClassSubject = inspector.clazz(TestClass.class); |
| assertThat(testClassSubject, isPresent()); |
| |
| MethodSubject mainMethodSubject = testClassSubject.mainMethod(); |
| assertThat(mainMethodSubject, isPresent()); |
| assertEquals( |
| 1, |
| mainMethodSubject |
| .streamInstructions() |
| .filter(InstructionSubject::isInstanceGet) |
| .map(InstructionSubject::getField) |
| .filter(alwaysTrueFieldSubject.getField().field::equals) |
| .count()); |
| } |
| |
| static class TestClass { |
| |
| public static void main(String[] args) { |
| if (new Config().alwaysTrue) { |
| System.out.print("Hello"); |
| } |
| Config nullableConfig = System.currentTimeMillis() >= 0 ? new Config() : null; |
| if (nullableConfig.alwaysTrue) { |
| System.out.print(" world"); |
| } |
| if (nullableConfig.alwaysTrueNoSideEffects) { |
| System.out.println("!"); |
| } |
| } |
| } |
| |
| static class Config { |
| |
| boolean alwaysTrue; |
| boolean alwaysTrueNoSideEffects; |
| } |
| } |