Minor, add a bit more tests for KT-12063

compiler/testData/codegen/box/jvmStatic/protectedInSuperClass/defaultArguments.kt

@@ -0,0 +1,20 @@
+// TARGET_BACKEND: JVM
+// WITH_RUNTIME
+// FILE: 1.kt
+package a
+
+open class A {
+    companion object {
+        @JvmStatic
+        protected fun foo(result: String = "OK"): String = result
+    }
+}
+
+// FILE: 2.kt
+import a.*
+
+class B : A() {
+    fun bar(): String = foo()
+}
+
+fun box() = B().bar()

compiler/testData/codegen/box/jvmStatic/protectedInSuperClass/simpleFunction.kt

@@ -0,0 +1,21 @@
+// TARGET_BACKEND: JVM
+// IGNORE_BACKEND: JVM
+// WITH_RUNTIME
+// FILE: 1.kt
+package a
+
+open class A {
+    companion object {
+        @JvmStatic // Required to be accessible from subclasses of A in other packages.
+        protected fun foo() = "OK"
+    }
+}
+
+// FILE: 2.kt
+import a.*
+
+class B : A() {
+    fun bar() = foo() // calls static A.foo(), not inaccessible A.Companion.foo()
+}
+
+fun box() = B().bar()

compiler/testData/codegen/box/jvmStatic/protectedInSuperClass/simpleProperty.kt

@@ -0,0 +1,26 @@
+// TARGET_BACKEND: JVM
+// IGNORE_BACKEND: JVM
+// WITH_RUNTIME
+// FILE: 1.kt
+package a
+
+open class A {
+    companion object {
+        @JvmStatic
+        @get:JvmStatic
+        @set:JvmStatic
+        protected var foo = "Fail"
+    }
+}
+
+// FILE: 2.kt
+import a.*
+
+class B : A() {
+    fun bar(): String {
+        foo = "OK"
+        return foo
+    }
+}
+
+fun box() = B().bar()