Fix <rdar://problem/6770998> make cast of super illegal (again:-)

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68659 91177308-0d34-0410-b5e6-96231b3b80d8

include/clang/Basic/DiagnosticSemaKinds.td

@@ -1024,8 +1024,8 @@ def err_catch_param_not_objc_type : Error<
   "@catch parameter is not an Objective-C class type">;
 def err_illegal_qualifiers_on_catch_parm : Error<
   "illegal qualifiers on @catch parameter">;
-def warn_super_cast_deprecated : Warning<
-  "casting 'super' is deprecated (it isn't an expression)">;
+def err_illegal_super_cast : Error<
+  "cannot cast 'super' (it isn't an expression)">;
 
 
 // C++ casts

lib/Sema/SemaExpr.cpp

@@ -2510,7 +2510,7 @@ bool Sema::CheckCastTypes(SourceRange TyR, QualType castType, Expr *&castExpr) {
     if (CheckVectorCast(TyR, castType, castExpr->getType()))
       return true;
   } else if (getLangOptions().ObjC1 && isa<ObjCSuperExpr>(castExpr)) {
-    Diag(castExpr->getLocStart(), diag::warn_super_cast_deprecated) << TyR;
+    return Diag(castExpr->getLocStart(), diag::err_illegal_super_cast) << TyR;
   }
   return false;
 }

test/SemaObjC/call-super-2.m

@@ -2,10 +2,7 @@
 
 #include <stddef.h>
 
-typedef struct objc_class *Class;
-typedef struct objc_object {
-    Class isa;
-} *id;
+typedef struct objc_object *id;
 id objc_getClass(const char *s);
 
 @interface Object 
@@ -42,17 +39,17 @@ id objc_getClass(const char *s);
 + (int) class_func2
 {
    int i = [(id <Func>)self class_func0];
-   i += [(id <Func>)super class_func0];    // expected-warning {{casting 'super' is deprecated (it isn't an expression)}}
+   i += [(id <Func>)super class_func0];    // expected-error {{cannot cast 'super' (it isn't an expression)}}
    i += [(Class <Func>)self class_func0];  // expected-error {{protocol qualified 'Class' is unsupported}}
-   return i + [(Class <Func>)super class_func0]; // expected-error {{protocol qualified 'Class' is unsupported}} // expected-warning {{casting 'super' is deprecated (it isn't an expression)}}
+   return i + [(Class <Func>)super class_func0]; // expected-error {{protocol qualified 'Class' is unsupported}} // expected-error {{cannot cast 'super' (it isn't an expression)}}
 }
 + (int) class_func3
 {
-   return [(Object <Func> *)super class_func0];  // expected-warning {{casting 'super' is deprecated (it isn't an expression)}} // expected-warning {{method '-class_func0' not found (return type defaults to 'id')}} // expected-warning {{incompatible pointer to integer conversion returning 'id', expected 'int'}}
+   return [(Object <Func> *)super class_func0];  // expected-error {{cannot cast 'super' (it isn't an expression)}}
 }
 + (int) class_func4
 {
-   return [(Derived <Func> *)super class_func0]; // expected-warning {{casting 'super' is deprecated (it isn't an expression)}} // expected-warning {{method '-class_func0' not found (return type defaults to 'id')}} // expected-warning {{incompatible pointer to integer conversion returning 'id', expected 'int'}}
+   return [(Derived <Func> *)super class_func0]; // expected-error {{cannot cast 'super' (it isn't an expression)}}
 }   
 + (int) class_func5
 {
@@ -74,15 +71,15 @@ id objc_getClass(const char *s);
 }
 - (int) instance_func2
 {
-   return [(id <Func>)super instance_func0]; // expected-warning {{casting 'super' is deprecated (it isn't an expression)}}
+   return [(id <Func>)super instance_func0]; // expected-error {{cannot cast 'super' (it isn't an expression)}}
 }
 - (int) instance_func3
 {
-   return [(Object <Func> *)super instance_func0]; // expected-warning {{casting 'super' is deprecated (it isn't an expression)}}
+   return [(Object <Func> *)super instance_func0]; // expected-error {{cannot cast 'super' (it isn't an expression)}}
 }
 - (int) instance_func4
 {
-   return [(Derived <Func> *)super instance_func0]; // expected-warning {{casting 'super' is deprecated (it isn't an expression)}}
+   return [(Derived <Func> *)super instance_func0]; // expected-error {{cannot cast 'super' (it isn't an expression)}}
 }   
 - (int) instance_func5
 {