Add OpenInterfaceArrayInstanceofTest

Bug: b/557271665
Change-Id: I22c7ee6cdbbfed6a783c8fadafd223717bb90dd4

src/test/java8/ir/com/android/tools/r8/ir/optimize/interfaces/OpenInterfaceArrayInstanceofTest.java

diff --git a/src/test/java8/ir/com/android/tools/r8/ir/optimize/interfaces/OpenInterfaceArrayInstanceofTest.java b/src/test/java8/ir/com/android/tools/r8/ir/optimize/interfaces/OpenInterfaceArrayInstanceofTest.java
new file mode 100644
index 0000000..3fde2c8
--- /dev/null
+++ b/src/test/java8/ir/com/android/tools/r8/ir/optimize/interfaces/OpenInterfaceArrayInstanceofTest.java
@@ -0,0 +1,120 @@
+// Copyright (c) 2026, 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.interfaces;
+
+import static org.junit.Assert.assertEquals;
+
+import com.android.tools.r8.NeverInline;
+import com.android.tools.r8.NoVerticalClassMerging;
+import com.android.tools.r8.TestBase;
+import com.android.tools.r8.TestParameters;
+import com.android.tools.r8.TestParametersCollection;
+import com.google.common.collect.ImmutableList;
+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;
+import org.objectweb.asm.Opcodes;
+
+@RunWith(Parameterized.class)
+public class OpenInterfaceArrayInstanceofTest extends TestBase {
+
+  @Parameter(0)
+  public TestParameters parameters;
+
+  @Parameters(name = "{0}")
+  public static TestParametersCollection data() {
+    return getTestParameters().withCfRuntimes().build();
+  }
+
+  @Test
+  public void testJvm() throws Exception {
+    parameters.assumeJvmTestParameters();
+    testForRuntime(parameters)
+        .addProgramClasses(getProgramClasses())
+        .addProgramClassFileData(getTransformedMainClass())
+        .run(parameters.getRuntime(), Main.class)
+        .assertSuccessWithOutputLines("true", "false");
+  }
+
+  @Test
+  public void testR8() throws Exception {
+    testForR8(parameters)
+        .addProgramClasses(getProgramClasses())
+        .addProgramClassFileData(getTransformedMainClass())
+        .addKeepMainRule(Main.class)
+        .enableInliningAnnotations()
+        .enableNoVerticalClassMergingAnnotations()
+        .run(parameters.getRuntime(), Main.class)
+        // TODO(b/557271665): Should succeed with expected output.
+        .assertSuccessWithOutputLines("true", "true");
+  }
+
+  private List<Class<?>> getProgramClasses() {
+    return ImmutableList.of(I.class, A.class, B.class);
+  }
+
+  private byte[] getTransformedMainClass() {
+    return transformer(Main.class)
+        .transformTypeInsnInMethod(
+            "runB",
+            (opcode, type, visitor) -> {
+              if (opcode == Opcodes.NEW) {
+                assertEquals(type, binaryName(A.class));
+                visitor.visitTypeInsn(opcode, binaryName(B.class));
+              } else if (opcode == Opcodes.ANEWARRAY) {
+                assertEquals(type, binaryName(A.class));
+                visitor.visitTypeInsn(opcode, binaryName(B.class));
+              } else {
+                visitor.visitTypeInsn(opcode, type);
+              }
+            })
+        .transformMethodInsnInMethod(
+            "runB",
+            (opcode, owner, name, descriptor, isInterface, visitor) -> {
+              if (opcode == Opcodes.INVOKESPECIAL && owner.equals(binaryName(A.class))) {
+                visitor.visitMethodInsn(opcode, binaryName(B.class), name, descriptor, isInterface);
+              } else {
+                visitor.visitMethodInsn(opcode, owner, name, descriptor, isInterface);
+              }
+            })
+        .transform();
+  }
+
+  static class Main {
+
+    public static void main(String[] args) {
+      runA();
+      runB();
+    }
+
+    static void runA() {
+      test(new A[] {new A()});
+    }
+
+    static void runB() {
+      test(new A[] {new A()}); // transformed to test(new B[] {new B()})
+    }
+
+    @NeverInline
+    static void test(I[] arr) {
+      I i = arr[0];
+      if (i != null) {
+        System.out.println(i instanceof I);
+      } else {
+        System.out.println(true);
+      }
+    }
+  }
+
+  @NoVerticalClassMerging
+  interface I {}
+
+  static class A implements I {}
+
+  static class B {}
+}