Reproduce duplicate method after synthetic sharing
Bug: b/214901256
Change-Id: Ic2e721ca338830a5212f5d916c191ab9008fe2b7
diff --git a/src/test/java/com/android/tools/r8/synthesis/MethodCollisionAfterSyntheticSharingTest.java b/src/test/java/com/android/tools/r8/synthesis/MethodCollisionAfterSyntheticSharingTest.java
new file mode 100644
index 0000000..31210f6
--- /dev/null
+++ b/src/test/java/com/android/tools/r8/synthesis/MethodCollisionAfterSyntheticSharingTest.java
@@ -0,0 +1,115 @@
+// Copyright (c) 2023, 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.synthesis;
+
+import static com.android.tools.r8.utils.codeinspector.Matchers.isPresent;
+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.utils.BooleanUtils;
+import com.android.tools.r8.utils.codeinspector.AssertUtils;
+import com.android.tools.r8.utils.codeinspector.ClassSubject;
+import com.android.tools.r8.utils.codeinspector.MethodSubject;
+import java.util.List;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+import org.junit.runners.Parameterized.Parameter;
+import org.junit.runners.Parameterized.Parameters;
+
+@RunWith(Parameterized.class)
+public class MethodCollisionAfterSyntheticSharingTest extends TestBase {
+
+ @Parameter(0)
+ public boolean enableSyntheticSharing;
+
+ @Parameter(1)
+ public TestParameters parameters;
+
+ @Parameters(name = "{1}, sharing: {0}")
+ public static List<Object[]> data() {
+ return buildParameters(
+ BooleanUtils.values(), getTestParameters().withDexRuntimesAndAllApiLevels().build());
+ }
+
+ @Test
+ public void test() throws Exception {
+ AssertUtils.assertFailsCompilationIf(
+ enableSyntheticSharing,
+ () ->
+ testForR8(parameters.getBackend())
+ .addInnerClasses(getClass())
+ .addKeepMainRule(Main.class)
+ .addOptionsModification(
+ options -> options.testing.enableSyntheticSharing = enableSyntheticSharing)
+ .enableInliningAnnotations()
+ .noHorizontalClassMergingOfSynthetics()
+ .setMinApi(parameters)
+ .compile()
+ .inspect(
+ inspector -> {
+ ClassSubject mainClassSubject = inspector.clazz(Main.class);
+ assertThat(mainClassSubject, isPresent());
+
+ // Check that m(Object) has been strengthened to m(X) where X is a class in
+ // the program.
+ MethodSubject mObjectMethodSubject =
+ mainClassSubject.uniqueMethodThatMatches(
+ method ->
+ method
+ .getOriginalSignature()
+ .toString()
+ .equals("void m(java.lang.Object)"));
+ assertThat(mObjectMethodSubject, isPresent());
+ assertThat(
+ inspector.clazz(mObjectMethodSubject.getParameter(0).getTypeName()),
+ isPresent());
+
+ // Check that m(Runnable) has been strengthened to m(X) where X is a class in
+ // the program.
+ MethodSubject mRunnableMethodSubject =
+ mainClassSubject.uniqueMethodThatMatches(
+ method ->
+ method
+ .getOriginalSignature()
+ .toString()
+ .equals("void m(java.lang.Runnable)"));
+ assertThat(mRunnableMethodSubject, isPresent());
+ assertThat(
+ inspector.clazz(mRunnableMethodSubject.getParameter(0).getTypeName()),
+ isPresent());
+ })
+ .run(parameters.getRuntime(), Main.class)
+ .assertSuccessWithOutputLines("Hello, world!", "Hello, world!"));
+ }
+
+ static class Main {
+
+ public static void main(String[] args) {
+ Runnable runnable = Main::greet;
+ Runnable otherRunnable = Main::greet;
+ Object otherRunnableInDisguise = otherRunnable;
+ m(runnable);
+ m(otherRunnableInDisguise);
+ }
+
+ @NeverInline
+ static void m(Object otherRunnableInDisguise) {
+ Runnable otherRunnable = (Runnable) otherRunnableInDisguise;
+ otherRunnable.run();
+ }
+
+ @NeverInline
+ static void m(Runnable runnable) {
+ runnable.run();
+ }
+
+ static void greet() {
+ System.out.println("Hello, world!");
+ }
+ }
+}
