[analyzer] New checker for missing super calls in UIViewController subclasses.

This is a syntactic checker aimed at helping iOS programmers correctly
subclass and override the methods of UIViewController. While this should
eventually be covered by the 'objc_requires_super' attribute, this
checker can be used with the existing iOS SDKs without any header changes.

This new checker is currently named 'alpha.osx.cocoa.MissingSuperCall'.
Patch by Julian Mayer!

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166993 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/StaticAnalyzer/Checkers/Checkers.td b/lib/StaticAnalyzer/Checkers/Checkers.td
index 71b8931..b4b40fa 100644
--- a/lib/StaticAnalyzer/Checkers/Checkers.td
+++ b/lib/StaticAnalyzer/Checkers/Checkers.td
@@ -420,6 +420,10 @@
   HelpText<"Check that the invalidatable instance variables are invalidated in the methods annotated with objc_instance_variable_invalidator">,
   DescFile<"DirectIvarAssignment.cpp">;
 
+def ObjCSuperCallChecker : Checker<"MissingSuperCall">,
+  HelpText<"Warn about Objective-C methods that lack a necessary call to super">,
+  DescFile<"ObjCMissingSuperCallChecker.cpp">;
+
 } // end "alpha.osx.cocoa"
 
 let ParentPackage = CoreFoundation in {