| // 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.ifs; |
| |
| import static com.android.tools.r8.utils.codeinspector.Matchers.isPresent; |
| import static org.hamcrest.CoreMatchers.not; |
| import static org.hamcrest.MatcherAssert.assertThat; |
| |
| 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.utils.codeinspector.ClassSubject; |
| import com.android.tools.r8.utils.codeinspector.CodeInspector; |
| 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 SemiTrivialPhiBranchTest extends TestBase { |
| |
| private final TestParameters parameters; |
| |
| @Parameters(name = "{0}") |
| public static TestParametersCollection data() { |
| return getTestParameters().withDexRuntimes().withAllApiLevels().build(); |
| } |
| |
| public SemiTrivialPhiBranchTest(TestParameters parameters) { |
| this.parameters = parameters; |
| } |
| |
| @Test |
| public void test() throws Exception { |
| testForR8(parameters.getBackend()) |
| .addInnerClasses(SemiTrivialPhiBranchTest.class) |
| .addKeepMainRule(TestClass.class) |
| .enableInliningAnnotations() |
| .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.mainMethod(), isPresent()); |
| assertThat(testClassSubject.uniqueMethodWithName("live"), isPresent()); |
| assertThat(testClassSubject.uniqueMethodWithName("dead"), not(isPresent())); |
| } |
| |
| static class TestClass { |
| |
| public static void main(String[] args) { |
| boolean x; |
| if (System.currentTimeMillis() >= 0) { |
| x = true; |
| } else { |
| x = new BooleanBox(true).get(); |
| } |
| // After class inlining, the two operands to the phi become true. However, the phi does not |
| // become trivial until after canonicalization. Therefore, it is important that we run branch |
| // pruning after canonicalization. |
| if (x) { |
| live(); |
| } else { |
| dead(); |
| } |
| } |
| |
| @NeverInline |
| static void live() { |
| System.out.println("Live!"); |
| } |
| |
| @NeverInline |
| static void dead() { |
| System.out.println("Dead!"); |
| } |
| } |
| |
| static class BooleanBox { |
| |
| boolean value; |
| |
| BooleanBox(boolean value) { |
| this.value = value; |
| } |
| |
| boolean get() { |
| return value; |
| } |
| } |
| } |