[Objective-C Sema] Patch to not issue unavailbility/deprecated

warning when multiple method declarations are found in global pool
with differing types and some are available.
rdar://20408445

llvm-svn: 234328

clang/lib/Sema/SemaDeclObjC.cpp

@@ -2240,8 +2240,14 @@ void Sema::addMethodToGlobalList(ObjCMethodList *List,
     if (getLangOpts().Modules && !getLangOpts().CurrentModule.empty())
       continue;
 
-    if (!MatchTwoMethodDeclarations(Method, List->getMethod()))
+    if (!MatchTwoMethodDeclarations(Method, List->getMethod())) {
+      // Even if two method types do not match, we would like to say
+      // there is more than one declaration so unavailability/deprecated
+      // warning is not too noisy.
+      if (!Method->isDefined())
+        List->setHasMoreThanOneDecl(true);
       continue;
+    }
 
     ObjCMethodDecl *PrevObjCMethod = List->getMethod();
 

clang/test/SemaObjC/multiple-property-deprecated-decl.m

@@ -0,0 +1,19 @@
+// RUN: %clang_cc1  -fsyntax-only -triple x86_64-apple-macosx10.11 -verify -Wno-objc-root-class %s
+// RUN: %clang_cc1 -x objective-c++ -fsyntax-only -triple x86_64-apple-macosx10.11 -verify -Wno-objc-root-class %s
+// expected-no-diagnostics
+// rdar://20408445
+ 
+@protocol NSFileManagerDelegate @end
+
+@interface NSFileManager 
+@property (assign) id <NSFileManagerDelegate> delegate;
+@end
+
+@interface NSFontManager
+@property (assign) id delegate __attribute__((availability(macosx,introduced=10.0 ,deprecated=10.11,message="" "NSFontManager doesn't have any delegate method. This property should not be used.")));
+
+@end
+
+id Test20408445(id p) {
+        return [p delegate];
+}