| // 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.switches; |
| |
| import static com.android.tools.r8.utils.BooleanUtils.intValue; |
| 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.assertTrue; |
| |
| import com.android.tools.r8.TestBase; |
| import com.android.tools.r8.TestParameters; |
| import com.android.tools.r8.TestParametersCollection; |
| import com.android.tools.r8.ir.code.IRCode; |
| import com.android.tools.r8.ir.code.Instruction; |
| import com.android.tools.r8.utils.codeinspector.ClassSubject; |
| import com.android.tools.r8.utils.codeinspector.CodeInspector; |
| import com.android.tools.r8.utils.codeinspector.InstructionSubject; |
| import com.android.tools.r8.utils.codeinspector.InstructionSubject.JumboStringMode; |
| import com.android.tools.r8.utils.codeinspector.MethodSubject; |
| import it.unimi.dsi.fastutil.objects.Object2IntMap; |
| import it.unimi.dsi.fastutil.objects.Object2IntOpenHashMap; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.Parameterized; |
| |
| @RunWith(Parameterized.class) |
| public class ConvertRemovedStringSwitchTest extends TestBase { |
| |
| private final TestParameters parameters; |
| |
| @Parameterized.Parameters(name = "{0}") |
| public static TestParametersCollection data() { |
| return getTestParameters().withAllRuntimesAndApiLevels().build(); |
| } |
| |
| public ConvertRemovedStringSwitchTest(TestParameters parameters) { |
| this.parameters = parameters; |
| } |
| |
| @Test |
| public void test() throws Exception { |
| testForR8(parameters.getBackend()) |
| .addInnerClasses(ConvertRemovedStringSwitchTest.class) |
| .addKeepMainRule(TestClass.class) |
| .setMinApi(parameters.getApiLevel()) |
| .compile() |
| .inspect(this::inspect) |
| .run(parameters.getRuntime(), TestClass.class, "A", "B", "C", "D", "E") |
| .assertSuccessWithOutputLines("A", "B", "C", "D", "E!"); |
| } |
| |
| private void inspect(CodeInspector inspector) { |
| ClassSubject classSubject = inspector.clazz(TestClass.class); |
| assertThat(classSubject, isPresent()); |
| |
| MethodSubject mainMethodSubject = classSubject.mainMethod(); |
| assertThat(mainMethodSubject, isPresent()); |
| |
| // Verify that the keys were canonicalized. |
| Object2IntMap<String> stringCounts = countStrings(mainMethodSubject); |
| assertEquals(1 + intValue(parameters.isCfRuntime()), stringCounts.getInt("A")); |
| assertEquals(1 + intValue(parameters.isCfRuntime()), stringCounts.getInt("B")); |
| assertEquals(1 + intValue(parameters.isCfRuntime()), stringCounts.getInt("C")); |
| assertEquals(1 + intValue(parameters.isCfRuntime()), stringCounts.getInt("D")); |
| assertEquals(1, stringCounts.getInt("E")); |
| assertEquals(1, stringCounts.getInt("E!")); |
| |
| // Verify that we can rebuild the StringSwitch instruction. |
| IRCode code = mainMethodSubject.buildIR(); |
| assertTrue(code.streamInstructions().anyMatch(Instruction::isStringSwitch)); |
| } |
| |
| private static Object2IntMap<String> countStrings(MethodSubject methodSubject) { |
| Object2IntMap<String> result = new Object2IntOpenHashMap<>(); |
| methodSubject |
| .streamInstructions() |
| .filter(instruction -> instruction.isConstString(JumboStringMode.ALLOW)) |
| .map(InstructionSubject::getConstString) |
| .forEach(string -> result.put(string, result.getInt(string) + 1)); |
| return result; |
| } |
| |
| static class TestClass { |
| |
| public static void main(String[] args) { |
| for (String arg : args) { |
| switch (arg) { |
| case "A": |
| System.out.println("A"); |
| break; |
| case "B": |
| System.out.println("B"); |
| break; |
| case "C": |
| System.out.println("C"); |
| break; |
| case "D": |
| System.out.println("D"); |
| break; |
| case "E": |
| // Intentionally "E!" to prevent canonicalization of this key. |
| System.out.println("E!"); |
| break; |
| } |
| } |
| } |
| } |
| } |