Reproduce NPE in TrivialCheckCastAndInstanceOfRemover
Bug: b/358913905
Change-Id: Ieb5e664a94208dfa4bb9dfcc2e87a28f74f5afd0
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/checkcast/CastInDeadCodeafterInstanceOfOptimizationTest.java b/src/test/java/com/android/tools/r8/ir/optimize/checkcast/CastInDeadCodeafterInstanceOfOptimizationTest.java
new file mode 100644
index 0000000..ea1f79f
--- /dev/null
+++ b/src/test/java/com/android/tools/r8/ir/optimize/checkcast/CastInDeadCodeafterInstanceOfOptimizationTest.java
@@ -0,0 +1,64 @@
+// 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.ir.optimize.checkcast;
+
+import com.android.tools.r8.TestBase;
+import com.android.tools.r8.TestParameters;
+import com.android.tools.r8.TestParametersCollection;
+import com.android.tools.r8.utils.StringUtils;
+import com.android.tools.r8.utils.codeinspector.AssertUtils;
+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;
+
+// This is a regression test for b/358913905.
+@RunWith(Parameterized.class)
+public class CastInDeadCodeafterInstanceOfOptimizationTest extends TestBase {
+
+ @Parameter(0)
+ public TestParameters parameters;
+
+ @Parameters(name = "{0}")
+ public static TestParametersCollection data() {
+ return getTestParameters().withAllRuntimesAndApiLevels().build();
+ }
+
+ private static final String EXPECTED_OUTPUT = StringUtils.lines("Hello, world!");
+
+ @Test
+ public void testD8() throws Exception {
+ parameters.assumeDexRuntime();
+ testForD8(parameters.getBackend())
+ .addInnerClasses(getClass())
+ .setMinApi(parameters)
+ .run(parameters.getRuntime(), TestClass.class)
+ .assertSuccessWithOutput(EXPECTED_OUTPUT);
+ }
+
+ @Test
+ public void testR8() throws Exception {
+ AssertUtils.assertFailsCompilation(
+ () ->
+ testForR8(parameters.getBackend())
+ .addInnerClasses(getClass())
+ .addKeepMainRule(TestClass.class)
+ .setMinApi(parameters)
+ .run(parameters.getRuntime(), TestClass.class)
+ .assertSuccessWithOutput(EXPECTED_OUTPUT));
+ }
+
+ static class TestClass {
+
+ public static void main(String[] args) {
+ Object object = new Object();
+ if (object instanceof int[]) {
+ int[] object2 = (int[]) object;
+ }
+ System.out.println("Hello, world!");
+ }
+ }
+}
