Don't emit unused warning for deleted functions. Fixes rdar://8365684 & http://llvm.org/PR9391.

llvm-svn: 126950

clang/lib/Sema/Sema.cpp

@@ -451,6 +451,8 @@ void Sema::ActOnEndOfTranslationUnit() {
         const FunctionDecl *DiagD;
         if (!FD->hasBody(DiagD))
           DiagD = FD;
+        if (DiagD->isDeleted())
+          continue; // Deleted functions are supposed to be unused.
         Diag(DiagD->getLocation(),
              isa<CXXMethodDecl>(DiagD) ? diag::warn_unused_member_function
                                        : diag::warn_unused_function)

clang/test/SemaCXX/unused-functions.cpp

@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 -fsyntax-only -Wunused -verify %s
+// RUN: %clang_cc1 -std=c++0x -fsyntax-only -Wunused -verify %s
 
 static int foo(int x) { return x; }
 
@@ -6,3 +6,5 @@ template<typename T>
 T get_from_foo(T y) { return foo(y); }
 
 int g(int z) { return get_from_foo(z); }
+
+namespace { void f() = delete; }