Tests for renamed fields

compiler/testData/codegen/box/fieldRename/delegates.kt

@@ -0,0 +1,26 @@
+public open class TestDelegate<T: Any>(private val initializer: () -> T) {
+    private volatile var value: T? = null
+
+    public open fun get(thisRef: Any?, desc: PropertyMetadata): T {
+        if (value == null) {
+            value = initializer()
+        }
+        return value!!
+    }
+
+    public open fun set(thisRef: Any?, desc: PropertyMetadata, svalue : T) {
+        value = svalue
+    }
+}
+
+class A {}
+class B {}
+
+public val A.s: String by TestDelegate( {"OK2"})
+public val B.s: String by TestDelegate( {"OK"})
+
+fun box() : String {
+  if (A().s != "OK2") return "fail1"
+
+  return B().s
+}