Introduction of CastedClassReceiver and its handling in codegen #KT-6744 Fixed

ClassReceiver converted to Kotlin
Also #KT-7617 Fixed

compiler/backend/src/org/jetbrains/kotlin/codegen/ExpressionCodegen.java

@@ -359,7 +359,7 @@ public class ExpressionCodegen extends KtVisitor<StackValue, StackValue> impleme
 
     @Override
     public StackValue visitSuperExpression(@NotNull KtSuperExpression expression, StackValue data) {
-        return StackValue.thisOrOuter(this, getSuperCallLabelTarget(context, expression), true, true);
+        return StackValue.thisOrOuter(this, getSuperCallLabelTarget(context, expression), true, false);
     }
 
     @NotNull
@@ -2572,7 +2572,8 @@ public class ExpressionCodegen extends KtVisitor<StackValue, StackValue> impleme
                 }
             }
             else {
-                return StackValue.thisOrOuter(this, receiverDescriptor, isSuper, isEnumEntry(receiverDescriptor));
+                return StackValue.thisOrOuter(this, receiverDescriptor, isSuper,
+                                              receiverValue instanceof CastClassReceiver || isEnumEntry(receiverDescriptor));
             }
         }
         else if (receiverValue instanceof ScriptReceiver) {

compiler/backend/src/org/jetbrains/kotlin/codegen/StackValue.java

@@ -460,11 +460,11 @@ public abstract class StackValue {
             @NotNull ExpressionCodegen codegen,
             @NotNull ClassDescriptor descriptor,
             boolean isSuper,
-            boolean isExplicit
+            boolean castReceiver
     ) {
-        // Coerce explicit 'this' for the case when it is smart cast.
+        // Coerce 'this' for the case when it is smart cast.
         // Do not coerce for other cases due to the 'protected' access issues (JVMS 7, 4.9.2 Structural Constraints).
-        boolean coerceType = descriptor.getKind() == ClassKind.INTERFACE || (isExplicit && !isSuper);
+        boolean coerceType = descriptor.getKind() == ClassKind.INTERFACE || (castReceiver && !isSuper);
         return new ThisOuter(codegen, descriptor, isSuper, coerceType);
     }