| // 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.optimize.membervaluepropagation; |
| |
| import static com.android.tools.r8.utils.codeinspector.Matchers.isPresent; |
| import static org.hamcrest.MatcherAssert.assertThat; |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertNotEquals; |
| |
| 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 ClassInitializerDefaultsPropagationTest extends TestBase { |
| |
| private final TestParameters parameters; |
| |
| @Parameters(name = "{0}") |
| public static TestParametersCollection data() { |
| return getTestParameters().withAllRuntimesAndApiLevels().build(); |
| } |
| |
| public ClassInitializerDefaultsPropagationTest(TestParameters parameters) { |
| this.parameters = parameters; |
| } |
| |
| @Test |
| public void test() throws Exception { |
| testForR8(parameters.getBackend()) |
| .addProgramClasses(TestClass.class) |
| .addKeepMainRule(TestClass.class) |
| .setMinApi(parameters.getApiLevel()) |
| .compile() |
| .inspect(this::inspect) |
| .run(parameters.getRuntime(), TestClass.class) |
| .assertSuccessWithOutputLines("42.42", "42.42"); |
| } |
| |
| private void inspect(CodeInspector inspector) { |
| ClassSubject classSubject = inspector.clazz(TestClass.class); |
| assertThat(classSubject, isPresent()); |
| |
| // Both fields end up being dead due to member value propagation. |
| assertEquals(0, classSubject.allFields().size()); |
| |
| // Verify that there are two distinct numbers in the code. |
| long floatValue = Float.floatToIntBits(42.42f); |
| long doubleValue = Double.doubleToLongBits(42.42d); |
| assertNotEquals(floatValue, doubleValue); |
| assertEquals( |
| 2, |
| classSubject |
| .mainMethod() |
| .streamInstructions() |
| .filter(x -> x.isConstNumber(floatValue) || x.isConstNumber(doubleValue)) |
| .count()); |
| } |
| |
| static class TestClass { |
| |
| static float f = 42.42f; |
| static double d = 42.42d; |
| |
| public static void main(String[] args) { |
| // Test that we correctly map from float bits to int bits during member value propagation. |
| System.out.println(f); |
| |
| // Test that we correctly map from double bits to long bits during member value propagation. |
| System.out.println(d); |
| } |
| } |
| } |