ObjectiveC. Allow toll free bridge cast warnings outside

ARC and in objectiveC/ObjectiveC++ MRR mode as well.
// rdar://15454846


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@195288 91177308-0d34-0410-b5e6-96231b3b80d8

Author: Fariborz Jahanian

include/clang/Sema/Sema.h

@@ -6865,6 +6865,8 @@ class Sema {
                                   SourceLocation RParenLoc,
                                   Expr *SubExpr);
 
+  void CheckTollFreeBridgeCast(QualType castType, Expr *castExpr);
+  
   bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall);
 
   /// \brief Check whether the given new method is a valid override of the

lib/Sema/SemaCast.cpp

@@ -2074,6 +2074,8 @@ void CastOperation::CheckCXXCStyleCast(bool FunctionalStyle,
 
   if (Self.getLangOpts().ObjCAutoRefCount && tcr == TC_Success)
     checkObjCARCConversion(CCK);
+  else if (Self.getLangOpts().ObjC1 && tcr == TC_Success)
+    Self.CheckTollFreeBridgeCast(DestType, SrcExpr.get());
 
   if (tcr != TC_Success && msg != 0) {
     if (SrcExpr.get()->getType() == Self.Context.OverloadTy) {
@@ -2319,6 +2321,9 @@ void CastOperation::CheckCStyleCast() {
       return;
     }
   }
+  else if (Self.getLangOpts().ObjC1)
+    Self.CheckTollFreeBridgeCast(DestType, SrcExpr.get());
+  
   DiagnoseCastOfObjCSEL(Self, SrcExpr, DestType);
   DiagnoseBadFunctionCast(Self, SrcExpr, DestType);
   Kind = Self.PrepareScalarCast(SrcExpr, DestType);

lib/Sema/SemaExprObjC.cpp

@@ -3285,6 +3285,16 @@ static bool CheckObjCBridgeCFCast(Sema &S, QualType castType, Expr *castExpr) {
   return false;
 }
 
+void Sema::CheckTollFreeBridgeCast(QualType castType, Expr *castExpr) {
+  // warn in presense of __bridge casting to or from a toll free bridge cast.
+  ARCConversionTypeClass exprACTC = classifyTypeForARCConversion(castExpr->getType());
+  ARCConversionTypeClass castACTC = classifyTypeForARCConversion(castType);
+  if (castACTC == ACTC_retainable && exprACTC == ACTC_coreFoundation)
+    (void)CheckObjCBridgeNSCast(*this, castType, castExpr);
+  else if (castACTC == ACTC_coreFoundation && exprACTC == ACTC_retainable)
+    (void)CheckObjCBridgeCFCast(*this, castType, castExpr);
+}
+
 Sema::ARCConversionResult
 Sema::CheckObjCARCConversion(SourceRange castRange, QualType castType,
                              Expr *&castExpr, CheckedConversionKind CCK,
@@ -3617,15 +3627,8 @@ ExprResult Sema::ActOnObjCBridgedCast(Scope *S,
                                       Expr *SubExpr) {
   TypeSourceInfo *TSInfo = 0;
   QualType T = GetTypeFromParser(Type, &TSInfo);
-  if (Kind == OBC_Bridge) {
-    // warn in presense of __bridge casting to or from a toll free bridge cast.
-    ARCConversionTypeClass exprACTC = classifyTypeForARCConversion(SubExpr->getType());
-    ARCConversionTypeClass castACTC = classifyTypeForARCConversion(T);
-    if (castACTC == ACTC_retainable && exprACTC == ACTC_coreFoundation)
-      (void)CheckObjCBridgeNSCast(*this, T, SubExpr);
-    else if (castACTC == ACTC_coreFoundation && exprACTC == ACTC_retainable)
-      (void)CheckObjCBridgeCFCast(*this, T, SubExpr);
-  }
+  if (Kind == OBC_Bridge)
+    CheckTollFreeBridgeCast(T, SubExpr);
   if (!TSInfo)
     TSInfo = Context.getTrivialTypeSourceInfo(T, LParenLoc);
   return BuildObjCBridgedCast(LParenLoc, Kind, BridgeKeywordLoc, TSInfo, 

test/SemaObjC/objcbridge-attribute-arc.m

@@ -0,0 +1,139 @@
+// RUN: %clang_cc1 -fsyntax-only -x objective-c -fobjc-arc -verify -Wno-objc-root-class %s
+// rdar://15454846
+
+typedef struct __attribute__ ((objc_bridge(NSError))) __CFErrorRef * CFErrorRef; // expected-note 7 {{declared here}}
+
+typedef struct __attribute__ ((objc_bridge(MyError))) __CFMyErrorRef * CFMyErrorRef; // expected-note 3 {{declared here}}
+
+typedef struct __attribute__((objc_bridge(12))) __CFMyColor  *CFMyColorRef; // expected-error {{parameter of 'objc_bridge' attribute must be a single name of an Objective-C class}}
+
+typedef struct __attribute__ ((objc_bridge)) __CFArray *CFArrayRef; // expected-error {{parameter of 'objc_bridge' attribute must be a single name of an Objective-C class}}
+
+typedef void *  __attribute__ ((objc_bridge(NSURL))) CFURLRef;  // expected-error {{'objc_bridge' attribute only applies to struct or union}}
+
+typedef void * CFStringRef __attribute__ ((objc_bridge(NSString))); // expected-error {{'objc_bridge' attribute only applies to struct or union}}
+
+typedef struct __attribute__((objc_bridge(NSLocale, NSError))) __CFLocale *CFLocaleRef;// expected-error {{use of undeclared identifier 'NSError'}}
+
+typedef struct __CFData __attribute__((objc_bridge(NSData))) CFDataRef; // expected-error {{'objc_bridge' attribute only applies to struct or union}}
+
+typedef struct __attribute__((objc_bridge(NSDictionary))) __CFDictionary * CFDictionaryRef;
+
+typedef struct __CFSetRef * CFSetRef __attribute__((objc_bridge(NSSet))); // expected-error {{'objc_bridge' attribute only applies to struct or union}};
+
+typedef union __CFUColor __attribute__((objc_bridge(NSUColor))) * CFUColorRef; // expected-error {{'objc_bridge' attribute only applies to struct or union}};
+
+typedef union __CFUColor __attribute__((objc_bridge(NSUColor))) *CFUColor1Ref; // expected-error {{'objc_bridge' attribute only applies to struct or union}};
+
+typedef union __attribute__((objc_bridge(NSUColor))) __CFUPrimeColor XXX;
+typedef XXX *CFUColor2Ref;
+
+@interface I
+{
+   __attribute__((objc_bridge(NSError))) void * color; // expected-error {{'objc_bridge' attribute only applies to struct or union}};
+}
+@end
+
+@protocol NSTesting @end
+@class NSString;
+
+typedef struct __attribute__((objc_bridge(NSTesting))) __CFError *CFTestingRef; // expected-note {{declared here}}
+
+id Test1(CFTestingRef cf) {
+  return (NSString *)cf; // expected-error {{CF object of type 'CFTestingRef' (aka 'struct __CFError *') is bridged to 'NSTesting', which is not an Objective-C class}}
+}
+
+typedef CFErrorRef CFErrorRef1;
+
+typedef CFErrorRef1 CFErrorRef2; // expected-note 2 {{declared here}}
+
+@protocol P1 @end
+@protocol P2 @end
+@protocol P3 @end
+@protocol P4 @end
+@protocol P5 @end
+
+@interface NSError<P1, P2, P3> @end // expected-note 7 {{declared here}}
+
+@interface MyError : NSError // expected-note 3 {{declared here}}
+@end
+
+@interface NSUColor @end
+
+@class NSString;
+
+void Test2(CFErrorRef2 cf, NSError *ns, NSString *str, Class c, CFUColor2Ref cf2) {
+  (void)(NSString *)cf; // expected-warning {{'CFErrorRef2' (aka 'struct __CFErrorRef *') bridges to NSError, not 'NSString'}}
+  (void)(NSError *)cf; // okay
+  (void)(MyError*)cf; // okay,
+  (void)(NSUColor *)cf2; // okay
+  (void)(CFErrorRef)ns; // okay
+  (void)(CFErrorRef)str;  // expected-warning {{'NSString' cannot bridge to 'CFErrorRef' (aka 'struct __CFErrorRef *')}}
+  (void)(Class)cf; // expected-warning {{'CFErrorRef2' (aka 'struct __CFErrorRef *') bridges to NSError, not 'Class'}}
+  (void)(CFErrorRef)c; // expected-warning {{'Class' cannot bridge to 'CFErrorRef'}}
+}
+
+
+void Test3(CFErrorRef cf, NSError *ns) {
+  (void)(id)cf; // okay
+ (void)(id<P1, P2>)cf; // okay
+ (void)(id<P1, P2, P4>)cf; // expected-warning {{'CFErrorRef' (aka 'struct __CFErrorRef *') bridges to NSError, not 'id<P1,P2,P4>'}}
+}
+
+void Test4(CFMyErrorRef cf) {
+   (void)(id)cf; // okay
+ (void)(id<P1, P2>)cf; // ok
+ (void)(id<P1, P2, P3>)cf; // ok
+ (void)(id<P2, P3>)cf; // ok
+ (void)(id<P1, P2, P4>)cf; // expected-warning {{'CFMyErrorRef' (aka 'struct __CFMyErrorRef *') bridges to MyError, not 'id<P1,P2,P4>'}}
+}
+
+void Test5(id<P1, P2, P3> P123, id ID, id<P1, P2, P3, P4> P1234, id<P1, P2> P12, id<P2, P3> P23) {
+ (void)(CFErrorRef)ID; // ok
+ (void)(CFErrorRef)P123; // ok
+ (void)(CFErrorRef)P1234; // ok
+ (void)(CFErrorRef)P12; // expected-warning {{'id<P1,P2>' cannot bridge to 'CFErrorRef' (aka 'struct __CFErrorRef *')}}
+ (void)(CFErrorRef)P23; // expected-warning {{'id<P2,P3>' cannot bridge to 'CFErrorRef' (aka 'struct __CFErrorRef *')}}
+}
+
+void Test6(id<P1, P2, P3> P123, id ID, id<P1, P2, P3, P4> P1234, id<P1, P2> P12, id<P2, P3> P23) {
+
+ (void)(CFMyErrorRef)ID; // ok
+ (void)(CFMyErrorRef)P123; // ok
+ (void)(CFMyErrorRef)P1234; // ok
+ (void)(CFMyErrorRef)P12; // expected-warning {{'id<P1,P2>' cannot bridge to 'CFMyErrorRef' (aka 'struct __CFMyErrorRef *')}}
+ (void)(CFMyErrorRef)P23; // expected-warning {{'id<P2,P3>' cannot bridge to 'CFMyErrorRef' (aka 'struct __CFMyErrorRef *')}}
+}
+
+typedef struct __attribute__ ((objc_bridge(MyPersonalError))) __CFMyPersonalErrorRef * CFMyPersonalErrorRef;  // expected-note 4 {{declared here}}
+
+@interface MyPersonalError : NSError <P4> // expected-note 4 {{declared here}}
+@end
+
+void Test7(id<P1, P2, P3> P123, id ID, id<P1, P2, P3, P4> P1234, id<P1, P2> P12, id<P2, P3> P23) {
+ (void)(CFMyPersonalErrorRef)ID; // ok
+ (void)(CFMyPersonalErrorRef)P123; // expected-warning {{'id<P1,P2,P3>' cannot bridge to 'CFMyPersonalErrorRef' (aka 'struct __CFMyPersonalErrorRef *')}}
+ (void)(CFMyPersonalErrorRef)P1234; // ok
+ (void)(CFMyPersonalErrorRef)P12; //  expected-warning {{'id<P1,P2>' cannot bridge to 'CFMyPersonalErrorRef' (aka 'struct __CFMyPersonalErrorRef *')}}
+ (void)(CFMyPersonalErrorRef)P23; //  expected-warning {{'id<P2,P3>' cannot bridge to 'CFMyPersonalErrorRef' (aka 'struct __CFMyPersonalErrorRef *')}}
+}
+
+void Test8(CFMyPersonalErrorRef cf) {
+  (void)(id)cf; // ok
+  (void)(id<P1>)cf; // ok
+  (void)(id<P1, P2>)cf; // ok
+  (void)(id<P1, P2, P3>)cf; // ok
+  (void)(id<P1, P2, P3, P4>)cf; // ok
+  (void)(id<P1, P2, P3, P4, P5>)cf; // expected-warning {{'CFMyPersonalErrorRef' (aka 'struct __CFMyPersonalErrorRef *') bridges to MyPersonalError, not 'id<P1,P2,P3,P4,P5>'}}
+}
+
+void Test9(CFErrorRef2 cf, NSError *ns, NSString *str, Class c, CFUColor2Ref cf2) {
+  (void)(__bridge NSString *)cf; // expected-warning {{'CFErrorRef2' (aka 'struct __CFErrorRef *') bridges to NSError, not 'NSString'}}
+  (void)(__bridge NSError *)cf; // okay
+  (void)(__bridge MyError*)cf; // okay,
+  (void)(__bridge NSUColor *)cf2; // okay
+  (void)(__bridge CFErrorRef)ns; // okay
+  (void)(__bridge CFErrorRef)str;  // expected-warning {{'NSString' cannot bridge to 'CFErrorRef' (aka 'struct __CFErrorRef *')}}
+  (void)(__bridge Class)cf; // expected-warning {{'CFErrorRef2' (aka 'struct __CFErrorRef *') bridges to NSError, not 'Class'}}
+  (void)(__bridge CFErrorRef)c; // expected-warning {{'__unsafe_unretained Class' cannot bridge to 'CFErrorRef' (aka 'struct __CFErrorRef *')}}
+}

test/SemaObjC/objcbridge-attribute.m

@@ -1,7 +1,7 @@
-// RUN: %clang_cc1 -fsyntax-only -fobjc-arc -verify -Wno-objc-root-class %s
+// RUN: %clang_cc1 -fsyntax-only -verify -Wno-objc-root-class %s
 // rdar://15454846
 
-typedef struct __attribute__ ((objc_bridge(NSError))) __CFErrorRef * CFErrorRef; // expected-note 7 {{declared here}}
+typedef struct __attribute__ ((objc_bridge(NSError))) __CFErrorRef * CFErrorRef; // expected-note 5 {{declared here}}
 
 typedef struct __attribute__ ((objc_bridge(MyError))) __CFMyErrorRef * CFMyErrorRef; // expected-note 3 {{declared here}}
 
@@ -45,15 +45,15 @@ id Test1(CFTestingRef cf) {
 
 typedef CFErrorRef CFErrorRef1;
 
-typedef CFErrorRef1 CFErrorRef2; // expected-note 2 {{declared here}}
+typedef CFErrorRef1 CFErrorRef2; // expected-note {{declared here}}
 
 @protocol P1 @end
 @protocol P2 @end
 @protocol P3 @end
 @protocol P4 @end
 @protocol P5 @end
 
-@interface NSError<P1, P2, P3> @end // expected-note 7 {{declared here}}
+@interface NSError<P1, P2, P3> @end // expected-note 5 {{declared here}}
 
 @interface MyError : NSError // expected-note 3 {{declared here}}
 @end
@@ -126,14 +126,3 @@ void Test8(CFMyPersonalErrorRef cf) {
   (void)(id<P1, P2, P3, P4>)cf; // ok
   (void)(id<P1, P2, P3, P4, P5>)cf; // expected-warning {{'CFMyPersonalErrorRef' (aka 'struct __CFMyPersonalErrorRef *') bridges to MyPersonalError, not 'id<P1,P2,P3,P4,P5>'}}
 }
-
-void Test9(CFErrorRef2 cf, NSError *ns, NSString *str, Class c, CFUColor2Ref cf2) {
-  (void)(__bridge NSString *)cf; // expected-warning {{'CFErrorRef2' (aka 'struct __CFErrorRef *') bridges to NSError, not 'NSString'}}
-  (void)(__bridge NSError *)cf; // okay
-  (void)(__bridge MyError*)cf; // okay,
-  (void)(__bridge NSUColor *)cf2; // okay
-  (void)(__bridge CFErrorRef)ns; // okay
-  (void)(__bridge CFErrorRef)str;  // expected-warning {{'NSString' cannot bridge to 'CFErrorRef' (aka 'struct __CFErrorRef *')}}
-  (void)(__bridge Class)cf; // expected-warning {{'CFErrorRef2' (aka 'struct __CFErrorRef *') bridges to NSError, not 'Class'}}
-  (void)(__bridge CFErrorRef)c; // expected-warning {{'__unsafe_unretained Class' cannot bridge to 'CFErrorRef' (aka 'struct __CFErrorRef *')}}
-}

test/SemaObjCXX/objcbridge-attribute-arc.mm

@@ -0,0 +1,139 @@
+// RUN: %clang_cc1 -fsyntax-only -x objective-c++ -fobjc-arc -verify -Wno-objc-root-class %s
+// rdar://15454846
+
+typedef struct __attribute__ ((objc_bridge(NSError))) __CFErrorRef * CFErrorRef; // expected-note 7 {{declared here}}
+
+typedef struct __attribute__ ((objc_bridge(MyError))) __CFMyErrorRef * CFMyErrorRef; // expected-note 3 {{declared here}}
+
+typedef struct __attribute__((objc_bridge(12))) __CFMyColor  *CFMyColorRef; // expected-error {{parameter of 'objc_bridge' attribute must be a single name of an Objective-C class}}
+
+typedef struct __attribute__ ((objc_bridge)) __CFArray *CFArrayRef; // expected-error {{parameter of 'objc_bridge' attribute must be a single name of an Objective-C class}}
+
+typedef void *  __attribute__ ((objc_bridge(NSURL))) CFURLRef;  // expected-error {{'objc_bridge' attribute only applies to struct, union or class}}
+
+typedef void * CFStringRef __attribute__ ((objc_bridge(NSString))); // expected-error {{'objc_bridge' attribute only applies to struct, union or class}}
+
+typedef struct __attribute__((objc_bridge(NSLocale, NSError))) __CFLocale *CFLocaleRef;// expected-error {{use of undeclared identifier 'NSError'}}
+
+typedef struct __CFData __attribute__((objc_bridge(NSData))) CFDataRef; // expected-error {{'objc_bridge' attribute only applies to struct, union or class}}
+
+typedef struct __attribute__((objc_bridge(NSDictionary))) __CFDictionary * CFDictionaryRef;
+
+typedef struct __CFSetRef * CFSetRef __attribute__((objc_bridge(NSSet))); // expected-error {{'objc_bridge' attribute only applies to struct, union or class}};
+
+typedef union __CFUColor __attribute__((objc_bridge(NSUColor))) * CFUColorRef; // expected-error {{'objc_bridge' attribute only applies to struct, union or class}};
+
+typedef union __CFUColor __attribute__((objc_bridge(NSUColor))) *CFUColor1Ref; // expected-error {{'objc_bridge' attribute only applies to struct, union or class}};
+
+typedef union __attribute__((objc_bridge(NSUColor))) __CFUPrimeColor XXX;
+typedef XXX *CFUColor2Ref;
+
+@interface I
+{
+   __attribute__((objc_bridge(NSError))) void * color; // expected-error {{'objc_bridge' attribute only applies to struct, union or class}};
+}
+@end
+
+@protocol NSTesting @end
+@class NSString;
+
+typedef struct __attribute__((objc_bridge(NSTesting))) __CFError *CFTestingRef; // expected-note {{declared here}}
+
+id Test1(CFTestingRef cf) {
+  return (NSString *)cf; // expected-error {{CF object of type 'CFTestingRef' (aka '__CFError *') is bridged to 'NSTesting', which is not an Objective-C class}}
+}
+
+typedef CFErrorRef CFErrorRef1;
+
+typedef CFErrorRef1 CFErrorRef2; // expected-note 2 {{declared here}}
+
+@protocol P1 @end
+@protocol P2 @end
+@protocol P3 @end
+@protocol P4 @end
+@protocol P5 @end
+
+@interface NSError<P1, P2, P3> @end // expected-note 7 {{declared here}}
+
+@interface MyError : NSError // expected-note 3 {{declared here}}
+@end
+
+@interface NSUColor @end
+
+@class NSString;
+
+void Test2(CFErrorRef2 cf, NSError *ns, NSString *str, Class c, CFUColor2Ref cf2) {
+  (void)(NSString *)cf; // expected-warning {{'CFErrorRef2' (aka '__CFErrorRef *') bridges to NSError, not 'NSString'}}
+  (void)(NSError *)cf; // okay
+  (void)(MyError*)cf; // okay,
+  (void)(NSUColor *)cf2; // okay
+  (void)(CFErrorRef)ns; // okay
+  (void)(CFErrorRef)str;  // expected-warning {{'NSString' cannot bridge to 'CFErrorRef' (aka '__CFErrorRef *')}}
+  (void)(Class)cf; // expected-warning {{'CFErrorRef2' (aka '__CFErrorRef *') bridges to NSError, not 'Class'}}
+  (void)(CFErrorRef)c; // expected-warning {{'Class' cannot bridge to 'CFErrorRef'}}
+}
+
+
+void Test3(CFErrorRef cf, NSError *ns) {
+  (void)(id)cf; // okay
+ (void)(id<P1, P2>)cf; // okay
+ (void)(id<P1, P2, P4>)cf; // expected-warning {{'CFErrorRef' (aka '__CFErrorRef *') bridges to NSError, not 'id<P1,P2,P4>'}}
+}
+
+void Test4(CFMyErrorRef cf) {
+   (void)(id)cf; // okay
+ (void)(id<P1, P2>)cf; // ok
+ (void)(id<P1, P2, P3>)cf; // ok
+ (void)(id<P2, P3>)cf; // ok
+ (void)(id<P1, P2, P4>)cf; // expected-warning {{'CFMyErrorRef' (aka '__CFMyErrorRef *') bridges to MyError, not 'id<P1,P2,P4>'}}
+}
+
+void Test5(id<P1, P2, P3> P123, id ID, id<P1, P2, P3, P4> P1234, id<P1, P2> P12, id<P2, P3> P23) {
+ (void)(CFErrorRef)ID; // ok
+ (void)(CFErrorRef)P123; // ok
+ (void)(CFErrorRef)P1234; // ok
+ (void)(CFErrorRef)P12; // expected-warning {{'id<P1,P2>' cannot bridge to 'CFErrorRef' (aka '__CFErrorRef *')}}
+ (void)(CFErrorRef)P23; // expected-warning {{'id<P2,P3>' cannot bridge to 'CFErrorRef' (aka '__CFErrorRef *')}}
+}
+
+void Test6(id<P1, P2, P3> P123, id ID, id<P1, P2, P3, P4> P1234, id<P1, P2> P12, id<P2, P3> P23) {
+
+ (void)(CFMyErrorRef)ID; // ok
+ (void)(CFMyErrorRef)P123; // ok
+ (void)(CFMyErrorRef)P1234; // ok
+ (void)(CFMyErrorRef)P12; // expected-warning {{'id<P1,P2>' cannot bridge to 'CFMyErrorRef' (aka '__CFMyErrorRef *')}}
+ (void)(CFMyErrorRef)P23; // expected-warning {{'id<P2,P3>' cannot bridge to 'CFMyErrorRef' (aka '__CFMyErrorRef *')}}
+}
+
+typedef struct __attribute__ ((objc_bridge(MyPersonalError))) __CFMyPersonalErrorRef * CFMyPersonalErrorRef;  // expected-note 4 {{declared here}}
+
+@interface MyPersonalError : NSError <P4> // expected-note 4 {{declared here}}
+@end
+
+void Test7(id<P1, P2, P3> P123, id ID, id<P1, P2, P3, P4> P1234, id<P1, P2> P12, id<P2, P3> P23) {
+ (void)(CFMyPersonalErrorRef)ID; // ok
+ (void)(CFMyPersonalErrorRef)P123; // expected-warning {{'id<P1,P2,P3>' cannot bridge to 'CFMyPersonalErrorRef' (aka '__CFMyPersonalErrorRef *')}}
+ (void)(CFMyPersonalErrorRef)P1234; // ok
+ (void)(CFMyPersonalErrorRef)P12; //  expected-warning {{'id<P1,P2>' cannot bridge to 'CFMyPersonalErrorRef' (aka '__CFMyPersonalErrorRef *')}}
+ (void)(CFMyPersonalErrorRef)P23; //  expected-warning {{'id<P2,P3>' cannot bridge to 'CFMyPersonalErrorRef' (aka '__CFMyPersonalErrorRef *')}}
+}
+
+void Test8(CFMyPersonalErrorRef cf) {
+  (void)(id)cf; // ok
+  (void)(id<P1>)cf; // ok
+  (void)(id<P1, P2>)cf; // ok
+  (void)(id<P1, P2, P3>)cf; // ok
+  (void)(id<P1, P2, P3, P4>)cf; // ok
+  (void)(id<P1, P2, P3, P4, P5>)cf; // expected-warning {{'CFMyPersonalErrorRef' (aka '__CFMyPersonalErrorRef *') bridges to MyPersonalError, not 'id<P1,P2,P3,P4,P5>'}}
+}
+
+void Test9(CFErrorRef2 cf, NSError *ns, NSString *str, Class c, CFUColor2Ref cf2) {
+  (void)(__bridge NSString *)cf; // expected-warning {{'CFErrorRef2' (aka '__CFErrorRef *') bridges to NSError, not 'NSString'}}
+  (void)(__bridge NSError *)cf; // okay
+  (void)(__bridge MyError*)cf; // okay,
+  (void)(__bridge NSUColor *)cf2; // okay
+  (void)(__bridge CFErrorRef)ns; // okay
+  (void)(__bridge CFErrorRef)str;  // expected-warning {{'NSString' cannot bridge to 'CFErrorRef' (aka '__CFErrorRef *')}}
+  (void)(__bridge Class)cf; // expected-warning {{'CFErrorRef2' (aka '__CFErrorRef *') bridges to NSError, not 'Class'}}
+  (void)(__bridge CFErrorRef)c; // expected-warning {{'__unsafe_unretained Class' cannot bridge to 'CFErrorRef' (aka '__CFErrorRef *')}}
+}