Fix <rdar://problem/7033733>. The CF_RETURNS_RETAINED attribute should work if the return type on an Objective-C method is a CF type reference, not just an Objective-C object reference.

llvm-svn: 74841

clang/lib/Analysis/CFRefCount.cpp

@@ -1267,15 +1267,23 @@ RetainSummaryManager::updateSummaryFromAnnotations(RetainSummary &Summ,
   if (!MD)
     return;
 
+  bool isTrackedLoc = false;
+  
   // Determine if there is a special return effect for this method.
   if (isTrackedObjCObjectType(MD->getResultType())) {
     if (MD->getAttr<NSReturnsRetainedAttr>()) {
       Summ.setRetEffect(ObjCAllocRetE);
+      return;
     }
-    else if (MD->getAttr<CFReturnsRetainedAttr>()) {
-      Summ.setRetEffect(RetEffect::MakeOwned(RetEffect::CF, true));
-    }
+    
+    isTrackedLoc = true;
   }
+  
+  if (!isTrackedLoc)
+    isTrackedLoc = MD->getResultType()->getAsPointerType() != NULL;
+    
+  if (isTrackedLoc && MD->getAttr<CFReturnsRetainedAttr>())
+    Summ.setRetEffect(RetEffect::MakeOwned(RetEffect::CF, true));
 }
 
 RetainSummary*

clang/test/Analysis/retain-release.m

@@ -815,7 +815,9 @@ void test_attr_1b(TestOwnershipAttr *X) {
 
 @interface MyClassTestCFAttr : NSObject {}
 - (NSDate*) returnsCFRetained __attribute__((cf_returns_retained));
+- (CFDateRef) returnsCFRetainedAsCF __attribute__((cf_returns_retained));
 - (NSDate*) alsoReturnsRetained;
+- (CFDateRef) alsoReturnsRetainedAsCF;
 - (NSDate*) returnsNSRetained __attribute__((ns_returns_retained));
 @end
 
@@ -829,10 +831,20 @@ CFDateRef returnsRetainedCFDate()  {
   return (NSDate*) returnsRetainedCFDate(); // No leak.
 }
 
+- (CFDateRef) returnsCFRetainedAsCF {
+  return returnsRetainedCFDate(); // No leak.
+}
+
+
 - (NSDate*) alsoReturnsRetained {
   return (NSDate*) returnsRetainedCFDate(); // expected-warning{{leak}}
 }
 
+- (CFDateRef) alsoReturnsRetainedAsCF {
+  return returnsRetainedCFDate(); // expected-warning{{leak}}
+}
+
+
 - (NSDate*) returnsNSRetained {
   return (NSDate*) returnsRetainedCFDate(); // no-warning
 }