Reproduce missing enum unboxing analysis of instance-of
Bug: b/321689478
Change-Id: Ib29e061065a9793e367a4ff3d7931d94353addf0
diff --git a/src/test/java/com/android/tools/r8/enumunboxing/EnumUnboxingInstanceOfTest.java b/src/test/java/com/android/tools/r8/enumunboxing/EnumUnboxingInstanceOfTest.java
new file mode 100644
index 0000000..0e13ceb
--- /dev/null
+++ b/src/test/java/com/android/tools/r8/enumunboxing/EnumUnboxingInstanceOfTest.java
@@ -0,0 +1,62 @@
+// Copyright (c) 2024, 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.enumunboxing;
+
+import static com.android.tools.r8.utils.codeinspector.AssertUtils.assertFailsCompilation;
+
+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 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 EnumUnboxingInstanceOfTest extends TestBase {
+
+ @Parameter(0)
+ public TestParameters parameters;
+
+ @Parameters(name = "{0}")
+ public static TestParametersCollection data() {
+ return getTestParameters().withAllRuntimesAndApiLevels().build();
+ }
+
+ @Test
+ public void test() throws Exception {
+ assertFailsCompilation(
+ () ->
+ testForR8(parameters.getBackend())
+ .addInnerClasses(getClass())
+ .addKeepMainRule(Main.class)
+ .enableInliningAnnotations()
+ .setMinApi(parameters)
+ .compile());
+ }
+
+ static class Main {
+
+ public static void main(String[] args) {
+ Object nullableObject = System.currentTimeMillis() > 0 ? new Object() : null;
+ System.out.println(test(nullableObject));
+
+ // Use enum instance so we don't treat MyEnum as uninstantiated.
+ MyEnum e = System.currentTimeMillis() > 0 ? MyEnum.A : MyEnum.B;
+ System.out.println(e.name());
+ }
+
+ @NeverInline
+ static boolean test(Object e) {
+ return e instanceof MyEnum;
+ }
+ }
+
+ enum MyEnum {
+ A,
+ B
+ }
+}
