Fix <rdar://problem/6191148> [sema] Objective-C method lookup (at global scope) fails to handle overloaded selectors properly.

Long standing bug in Sema::ActOnInstanceMessage(). We now warn when messaging an "id" with multiple method signatures in scope. The diags are a little verbose, however they can be streamlined if necessary. 

llvm-svn: 56843

1 files changed, 4 insertions, 0 deletions

diff --git a/clang/lib/Sema/Sema.h b/clang/lib/Sema/Sema.h
index dcd197dad6f..49d69ad92da 100644
--- a/clang/lib/Sema/Sema.h
+++ b/clang/lib/Sema/Sema.h
@@ -379,6 +379,10 @@ private:
   /// messages sent to "id" (where the class of the object is unknown).
   void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method);
   
+  /// LookupInstanceMethodInGlobalPool - Returns the method and warns if
+  /// there are multiple signatures.
+  ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R);
+  
   /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods.
   void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method);
   //===--------------------------------------------------------------------===//