| // 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.shaking.assumevalues; |
| |
| 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.TestBase; |
| import com.android.tools.r8.TestParameters; |
| import com.android.tools.r8.TestParametersCollection; |
| import com.android.tools.r8.utils.StringUtils; |
| 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.MethodSubject; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.Parameterized; |
| |
| class TestClass { |
| private static final boolean HAS_R8 = Boolean.parseBoolean("false"); |
| |
| public static void main(String... args) { |
| if (HAS_R8) { |
| System.out.println("R8"); |
| } else { |
| System.out.println("No R8"); |
| } |
| } |
| } |
| |
| @RunWith(Parameterized.class) |
| public class DeadFieldAfterAssumevaluesTest extends TestBase { |
| private static final Class<?> MAIN = TestClass.class; |
| private static final String EXPECTED_OUTPUT = StringUtils.lines("R8"); |
| private static final String RULES = StringUtils.lines( |
| "-assumevalues class **.TestClass {", |
| " static boolean HAS_R8 return true;", |
| "}", |
| "-assumenosideeffects class java.lang.Boolean {", |
| " static boolean parseBoolean(java.lang.String);", |
| "}" |
| ); |
| |
| @Parameterized.Parameters(name = "{0}") |
| public static TestParametersCollection data() { |
| return getTestParameters().withAllRuntimes().build(); |
| } |
| |
| private final TestParameters parameters; |
| |
| public DeadFieldAfterAssumevaluesTest(TestParameters parameters) { |
| this.parameters = parameters; |
| } |
| |
| @Test |
| public void testR8() throws Exception { |
| testForR8(parameters.getBackend()) |
| .addProgramClasses(MAIN) |
| .addKeepMainRule(MAIN) |
| .addKeepRules(RULES) |
| .setMinApi(parameters.getRuntime()) |
| .run(parameters.getRuntime(), MAIN) |
| .assertSuccessWithOutput(EXPECTED_OUTPUT) |
| .inspect(this::inspect); |
| } |
| |
| private void inspect(CodeInspector inspector) { |
| ClassSubject main = inspector.clazz(MAIN); |
| assertThat(main, isPresent()); |
| |
| MethodSubject mainMethod = main.mainMethod(); |
| assertThat(mainMethod, isPresent()); |
| // After applying -assumevalues, no more branching in the main method. |
| assertTrue(mainMethod.streamInstructions() |
| .noneMatch(i -> i.isIf() || i.isIfEqz() || i.isIfNez())); |
| |
| FieldSubject hasR8 = main.uniqueFieldWithName("HAS_R8"); |
| assertThat(hasR8, not(isPresent())); |
| |
| MethodSubject clinit = main.clinit(); |
| assertThat(clinit, not(isPresent())); |
| } |
| } |