Update CF reference count checker test case to illustrate the use of

toll-free bridging.

llvm-svn: 49772

clang/test/Analysis-Apple/CFDate.c → clang/test/Analysis-Apple/CFDate.m

 // RUN: clang -checker-cfref -verify %s
 
 #include <CoreFoundation/CFDate.h>
+#include <Foundation/NSDate.h>
 
 CFAbsoluteTime f1() {
   CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
   CFDateRef date = CFDateCreate(NULL, t);
   CFRetain(date);
   CFRelease(date);
-  CFDateGetAbsoluteTime(date);
+  CFDateGetAbsoluteTime(date); // no-warning
   CFRelease(date);
   t = CFDateGetAbsoluteTime(date);   // expected-warning{{Reference-counted object is used after it is released.}}
   return t;
 }
 
+CFAbsoluteTime f2() {
+  CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
+  CFDateRef date = CFDateCreate(NULL, t);  
+  [((NSDate*) date) retain];
+  CFRelease(date);
+  CFDateGetAbsoluteTime(date); // no-warning
+  [((NSDate*) date) release];
+  t = CFDateGetAbsoluteTime(date);   // expected-warning{{Reference-counted object is used after it is released.}}
+  return t;
+}
+