Moved tests

that are used both for codegen & diagnostics to codegen/box/diagnostics

compiler/testData/codegen/box/diagnostics/functions/tailRecursion/labeledThisReferences.kt

@@ -0,0 +1,27 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
+class B {
+    inner class C {
+        tailRecursive fun h(counter : Int) {
+            if (counter > 0) {
+                this@C.h(counter - 1)
+            }
+        }
+
+        <!NO_TAIL_CALLS_FOUND!>tailRecursive fun h2(x : Any)<!> {
+            this@B.h2("no recursion") // keep vigilance
+        }
+
+    }
+
+    fun makeC() : C = C()
+
+    fun h2(x : Any) {
+    }
+}
+
+fun box() : String {
+    B().makeC().h(1000000)
+    B().makeC().h2(0)
+    return "OK"
+}