Add test for KT-19246

The issue was fixed by
https://github.com/jetbrains/kotlin/commit/904c7f9c640ccb38c0becb40bd3b5dad3ac921bd

compiler/testData/codegen/box/checkcastOptimization/kt19246.kt

@@ -0,0 +1,19 @@
+// WITH_RUNTIME
+
+enum class ResultType constructor(val reason: String) {
+    SOMETHING("123"),
+    OK("OK"),
+    UNKNOWN("FAIL");
+
+    companion object {
+        fun getByVal(reason: String): ResultType {
+            return ResultType.values().firstOrDefault({ it.reason == reason }, UNKNOWN)
+        }
+    }
+}
+
+inline fun <T> Array<out T>.firstOrDefault(predicate: (T) -> Boolean, default: T): T {
+    return firstOrNull(predicate) ?: default
+}
+
+fun box(): String = ResultType.getByVal("OK").reason

compiler/tests-ir-jvm/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java

@@ -2722,6 +2722,12 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/checkcastOptimization/kt19128.kt");
             doTest(fileName);
         }
+
+        @TestMetadata("kt19246.kt")
+        public void testKt19246() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/checkcastOptimization/kt19246.kt");
+            doTest(fileName);
+        }
     }
 
     @TestMetadata("compiler/testData/codegen/box/classLiteral")

compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java

@@ -2722,6 +2722,12 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/checkcastOptimization/kt19128.kt");
             doTest(fileName);
         }
+
+        @TestMetadata("kt19246.kt")
+        public void testKt19246() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/checkcastOptimization/kt19246.kt");
+            doTest(fileName);
+        }
     }
 
     @TestMetadata("compiler/testData/codegen/box/classLiteral")

compiler/tests/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java

@@ -2722,6 +2722,12 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/checkcastOptimization/kt19128.kt");
             doTest(fileName);
         }
+
+        @TestMetadata("kt19246.kt")
+        public void testKt19246() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/checkcastOptimization/kt19246.kt");
+            doTest(fileName);
+        }
     }
 
     @TestMetadata("compiler/testData/codegen/box/classLiteral")

js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/JsCodegenBoxTestGenerated.java

@@ -3274,6 +3274,12 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/checkcastOptimization/kt19128.kt");
             doTest(fileName);
         }
+
+        @TestMetadata("kt19246.kt")
+        public void testKt19246() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/checkcastOptimization/kt19246.kt");
+            doTest(fileName);
+        }
     }
 
     @TestMetadata("compiler/testData/codegen/box/classLiteral")