objective-C: Do not issue deprecated warning about implementation

of a deprecated method in original class (or category), only
in overrides. // rdar://12717705

llvm-svn: 168270

clang/lib/Sema/SemaDeclObjC.cpp

@@ -373,10 +373,23 @@ void Sema::ActOnStartOfObjCMethodDef(Scope *FnBodyScope, Decl *D) {
     ObjCMethodDecl *IMD = 
       IC->lookupMethod(MDecl->getSelector(), MDecl->isInstanceMethod());
     
-    if (IMD)
+    if (IMD) {
+      ObjCImplDecl *ImplDeclOfMethodDef = 
+        dyn_cast<ObjCImplDecl>(MDecl->getDeclContext());
+      ObjCContainerDecl *ContDeclOfMethodDecl = 
+        dyn_cast<ObjCContainerDecl>(IMD->getDeclContext());
+      ObjCImplDecl *ImplDeclOfMethodDecl = 0;
+      if (ObjCInterfaceDecl *OID = dyn_cast<ObjCInterfaceDecl>(ContDeclOfMethodDecl))
+        ImplDeclOfMethodDecl = OID->getImplementation();
+      else if (ObjCCategoryDecl *CD = dyn_cast<ObjCCategoryDecl>(ContDeclOfMethodDecl))
+        ImplDeclOfMethodDecl = CD->getImplementation();
+      // No need to issue deprecated warning if deprecated mehod in class/category
+      // is being implemented in its own implementation (no overriding is involved).
+      if (!ImplDeclOfMethodDecl || ImplDeclOfMethodDecl != ImplDeclOfMethodDef)
         DiagnoseObjCImplementedDeprecations(*this, 
                                           dyn_cast<NamedDecl>(IMD), 
                                           MDecl->getLocation(), 0);
+    }
 
     // If this is "dealloc" or "finalize", set some bit here.
     // Then in ActOnSuperMessage() (SemaExprObjC), set it back to false.

clang/test/SemaObjC/warn-deprecated-implementations.m

@@ -1,12 +1,13 @@
 // RUN: %clang_cc1 -fsyntax-only -Wdeprecated-implementations -verify -Wno-objc-root-class %s
 // rdar://8973810
+// rdar://12717705
 
 @protocol P
 - (void) D __attribute__((deprecated)); // expected-note {{method 'D' declared here}}
 @end
 
 @interface A <P>
-+ (void)F __attribute__((deprecated)); // expected-note {{method 'F' declared here}}
++ (void)F __attribute__((deprecated));
 @end
 
 @interface A()
@@ -14,11 +15,19 @@
 @end
 
 @implementation A
-+ (void)F { } //  expected-warning {{Implementing deprecated method}}
++ (void)F { }	// No warning, implementing its own deprecated method
 - (void) D {} //  expected-warning {{Implementing deprecated method}}
 - (void) E {} //  expected-warning {{Implementing deprecated method}}
 @end
 
+@interface A(CAT)
+- (void) G __attribute__((deprecated)); 
+@end
+
+@implementation A(CAT)
+- (void) G {} 	// No warning, implementing its own deprecated method
+@end
+
 __attribute__((deprecated))
 @interface CL // expected-note 2 {{class declared here}} // expected-note 2 {{declared here}}
 @end