Reproduce unexpected if in string builder optimization
Change-Id: I53f2c2730567bd3878f776bbe7bcba04dda18533
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/string/StringBuilderWithIfUserTest.java b/src/test/java/com/android/tools/r8/ir/optimize/string/StringBuilderWithIfUserTest.java
new file mode 100644
index 0000000..0b733bd
--- /dev/null
+++ b/src/test/java/com/android/tools/r8/ir/optimize/string/StringBuilderWithIfUserTest.java
@@ -0,0 +1,55 @@
+// Copyright (c) 2021, 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.string;
+
+import com.android.tools.r8.TestBase;
+import com.android.tools.r8.TestParameters;
+import com.android.tools.r8.TestParametersCollection;
+import com.android.tools.r8.utils.codeinspector.AssertUtils;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+
+@RunWith(Parameterized.class)
+public class StringBuilderWithIfUserTest extends TestBase {
+
+ private final TestParameters parameters;
+
+ @Parameterized.Parameters(name = "{0}")
+ public static TestParametersCollection data() {
+ return getTestParameters().withAllRuntimesAndApiLevels().build();
+ }
+
+ public StringBuilderWithIfUserTest(TestParameters parameters) {
+ this.parameters = parameters;
+ }
+
+ @Test
+ public void test() throws Exception {
+ AssertUtils.assertFailsCompilationIf(
+ parameters.isDexRuntime(),
+ () -> {
+ testForR8(parameters.getBackend())
+ .addInnerClasses(StringBuilderWithIfUserTest.class)
+ .addKeepMainRule(Main.class)
+ .setMinApi(parameters.getApiLevel())
+ .compile()
+ .run(parameters.getRuntime(), Main.class)
+ .assertSuccessWithOutputLines("Hello world!");
+ });
+ }
+
+ static class Main {
+
+ public static void main(String[] args) {
+ StringBuilder builder = new StringBuilder();
+ StringBuilder other = System.currentTimeMillis() > 0 ? new StringBuilder() : builder;
+ builder.append("Hello world!");
+ if (builder != other) {
+ System.out.println(builder.toString());
+ }
+ }
+ }
+}
