| // 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.callsites.constants; |
| |
| import static com.android.tools.r8.utils.codeinspector.Matchers.isPresent; |
| import static org.hamcrest.MatcherAssert.assertThat; |
| import static org.junit.Assert.assertTrue; |
| |
| import com.android.tools.r8.NeverClassInline; |
| import com.android.tools.r8.NeverInline; |
| import com.android.tools.r8.NeverMerge; |
| import com.android.tools.r8.TestBase; |
| import com.android.tools.r8.TestParameters; |
| import com.android.tools.r8.TestParametersCollection; |
| import com.android.tools.r8.graph.DexEncodedMethod; |
| import com.android.tools.r8.ir.analysis.value.AbstractValue; |
| import com.android.tools.r8.ir.optimize.info.CallSiteOptimizationInfo; |
| import com.android.tools.r8.utils.InternalOptions; |
| 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.MethodSubject; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.Parameterized; |
| |
| @RunWith(Parameterized.class) |
| public class InvokeVirtualPositiveTest extends TestBase { |
| private static final Class<?> MAIN = Main.class; |
| |
| @Parameterized.Parameters(name = "{0}") |
| public static TestParametersCollection data() { |
| return getTestParameters().withAllRuntimesAndApiLevels().build(); |
| } |
| |
| private final TestParameters parameters; |
| |
| public InvokeVirtualPositiveTest(TestParameters parameters) { |
| this.parameters = parameters; |
| } |
| |
| @Test |
| public void testR8() throws Exception { |
| testForR8(parameters.getBackend()) |
| .addInnerClasses(InvokeVirtualPositiveTest.class) |
| .addKeepMainRule(MAIN) |
| .enableMergeAnnotations() |
| .enableNeverClassInliningAnnotations() |
| .enableInliningAnnotations() |
| .addOptionsModification( |
| o -> { |
| o.testing.callSiteOptimizationInfoInspector = this::callSiteOptimizationInfoInspect; |
| }) |
| .setMinApi(parameters.getApiLevel()) |
| .addOptionsModification(InternalOptions::enablePropagationOfConstantsAtCallSites) |
| .run(parameters.getRuntime(), MAIN) |
| .assertSuccessWithOutputLines("non-null", "null") |
| .inspect(this::inspect); |
| } |
| |
| private void callSiteOptimizationInfoInspect(DexEncodedMethod encodedMethod) { |
| assert encodedMethod.method.name.toString().equals("m") |
| : "Unexpected revisit: " + encodedMethod.toSourceString(); |
| CallSiteOptimizationInfo callSiteOptimizationInfo = encodedMethod.getCallSiteOptimizationInfo(); |
| assert callSiteOptimizationInfo.getDynamicUpperBoundType(1).isDefinitelyNotNull(); |
| AbstractValue abstractValue = callSiteOptimizationInfo.getAbstractArgumentValue(1); |
| if (encodedMethod.method.holder.toSourceString().endsWith("$A")) { |
| assert abstractValue.isSingleStringValue() |
| && abstractValue.asSingleStringValue().getDexString().toString().equals("nul"); |
| } else { |
| assert abstractValue.isUnknown(); |
| } |
| } |
| |
| private void inspect(CodeInspector inspector) { |
| ClassSubject a = inspector.clazz(A.class); |
| assertThat(a, isPresent()); |
| |
| MethodSubject a_m = a.uniqueMethodWithName("m"); |
| assertThat(a_m, isPresent()); |
| // Can optimize branches since `arg` is definitely "nul", i.e., not containing "null". |
| assertTrue(a_m.streamInstructions().noneMatch(InstructionSubject::isIf)); |
| |
| ClassSubject b = inspector.clazz(B.class); |
| assertThat(b, isPresent()); |
| |
| MethodSubject b_m = b.uniqueMethodWithName("m"); |
| assertThat(b_m, isPresent()); |
| // Should not optimize branches since the value of `arg` is unsure. |
| assertTrue(b_m.streamInstructions().anyMatch(InstructionSubject::isIf)); |
| } |
| |
| @NeverMerge |
| @NeverClassInline |
| static class A { |
| @NeverInline |
| void m(String arg) { |
| if (arg.contains("null")) { |
| System.out.println("null"); |
| } else { |
| System.out.println("non-null"); |
| } |
| } |
| } |
| |
| @NeverClassInline |
| static class B extends A { |
| @NeverInline |
| @Override |
| void m(String arg) { |
| // Same as A#m. |
| if (arg.contains("null")) { |
| System.out.println("null"); |
| } else { |
| System.out.println("non-null"); |
| } |
| } |
| } |
| |
| static class Main { |
| public static void main(String... args) { |
| A a = System.currentTimeMillis() > 0 ? new A() : new B(); |
| a.m("nul"); // calls A.m() with "nul". |
| |
| A b = new B(); // with the exact type: |
| b.m("null"); // calls B.m() with "null". |
| } |
| } |
| } |