Add support for deprecated Obj-C methods. The semantics mostly match what gcc has.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@64562 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 77 insertions, 0 deletions

diff --git a/lib/Sema/SemaExprObjC.cpp b/lib/Sema/SemaExprObjC.cpp
index 6e110506eb..91e7a185b0 100644
--- a/lib/Sema/SemaExprObjC.cpp
+++ b/lib/Sema/SemaExprObjC.cpp
@@ -268,6 +268,9 @@ Sema::ExprResult Sema::ActOnClassMessage(
   if (!Method)
     Method = ClassDecl->lookupInstanceMethod(Sel);
 
+  if (Method && Method->getAttr<DeprecatedAttr>())
+    Diag(receiverLoc, diag::warn_deprecated) << Method->getDeclName();
+  
   if (CheckMessageArgumentTypes(ArgExprs, NumArgs, Sel, Method, true, 
                                 lbrac, rbrac, returnType))
     return true;
@@ -313,6 +316,9 @@ Sema::ExprResult Sema::ActOnInstanceMessage(ExprTy *receiver, Selector Sel,
           Method = SuperDecl->lookupInstanceMethod(Sel);
     }
 
+    if (Method && Method->getAttr<DeprecatedAttr>())
+      Diag(receiverLoc, diag::warn_deprecated) << Method->getDeclName();
+
     if (CheckMessageArgumentTypes(ArgExprs, NumArgs, Sel, Method, false,
                                   lbrac, rbrac, returnType))
       return true;
@@ -343,6 +349,9 @@ Sema::ExprResult Sema::ActOnInstanceMessage(ExprTy *receiver, Selector Sel,
         if (ObjCImplementationDecl *ImpDecl = 
               ObjCImplementations[ClassDecl->getIdentifier()])
           Method = ImpDecl->getClassMethod(Sel);
+      
+      if (Method && Method->getAttr<DeprecatedAttr>())
+        Diag(receiverLoc, diag::warn_deprecated) << Method->getDeclName();
     }
     if (!Method)
       Method = FactoryMethodPool[Sel].Method;
@@ -393,6 +402,9 @@ Sema::ExprResult Sema::ActOnInstanceMessage(ExprTy *receiver, Selector Sel,
     if (!Method && !OCIReceiver->qual_empty())
       Diag(lbrac, diag::warn_method_not_found_in_protocol)
         << Sel << SourceRange(lbrac, rbrac);
+    
+    if (Method && Method->getAttr<DeprecatedAttr>())
+      Diag(receiverLoc, diag::warn_deprecated) << Method->getDeclName();
   } else {
     Diag(lbrac, diag::error_bad_receiver_type)
       << RExpr->getType() << RExpr->getSourceRange();
diff --git a/test/SemaObjC/attr-deprecated.m b/test/SemaObjC/attr-deprecated.m
new file mode 100644
index 0000000000..9577e60b7d
--- /dev/null
+++ b/test/SemaObjC/attr-deprecated.m
@@ -0,0 +1,65 @@
+// RUN: clang %s -fsyntax-only -verify
+
+@interface A
++ (void)F __attribute__((deprecated));
+- (void)f __attribute__((deprecated));
+@end
+
+@implementation A
++ (void)F __attribute__((deprecated))
+{
+  [self F]; // expected-warning{{'F' is deprecated}}
+}
+
+- (void)g
+{
+  [self f]; // expected-warning{{'f' is deprecated}}
+}
+
+- (void)f
+{
+  [self f]; // expected-warning{{'f' is deprecated}}
+}
+@end
+
+@interface B: A
+@end
+  
+@implementation B
++ (void)G
+{
+  [super F]; // expected-warning{{'F' is deprecated}}
+}
+
+- (void)g
+{
+  [super f]; // // expected-warning{{'f' is deprecated}}
+}
+@end
+
+@protocol P
+- (void)p __attribute__((deprecated));
+@end
+
+void t1(A *a)
+{
+  [A F]; // expected-warning{{'F' is deprecated}}
+  [a f]; // expected-warning{{'f' is deprecated}}
+}
+
+void t2(id a)
+{
+  [a f];
+}
+
+void t3(A<P>* a)
+{
+  [a f]; // expected-warning{{'f' is deprecated}}
+  [a p]; // expected-warning{{'p' is deprecated}}
+} 
+
+void t4(Class c)
+{
+  [c F];
+}
+