JVM JVM_IR hide sealed class constructors

compiler/testData/codegen/box/sealed/constructorAnnotations.kt

@@ -0,0 +1,24 @@
+// TARGET_BACKEND: JVM
+// WITH_REFLECT
+
+annotation class Ann
+
+sealed class Test @Ann constructor(@Ann val x: String)
+
+fun box(): String {
+    val testCtor = Test::class.constructors.single()
+
+    val testCtorAnnClasses = testCtor.annotations.map { it.annotationClass }
+    if (testCtorAnnClasses != listOf(Ann::class)) {
+        throw AssertionError("Annotations on constructor: $testCtorAnnClasses")
+    }
+
+    for (param in testCtor.parameters) {
+        val paramAnnClasses = param.annotations.map { it.annotationClass }
+        if (paramAnnClasses != listOf(Ann::class)) {
+            throw AssertionError("Annotations on constructor parameter $param: $paramAnnClasses")
+        }
+    }
+
+    return "OK"
+}