GCC seems to create address-of expression manglings when passing *any*

function as a template argument where a pointer to function is wanted.
Just extend the existing hack.

llvm-svn: 130084

clang/lib/AST/ItaniumMangle.cpp

@@ -2458,8 +2458,7 @@ void CXXNameMangler::mangleTemplateArg(const NamedDecl *P,
     // an expression. We compensate for it here to produce the correct mangling.
     NamedDecl *D = cast<NamedDecl>(A.getAsDecl());
     const NonTypeTemplateParmDecl *Parameter = cast<NonTypeTemplateParmDecl>(P);
-    bool compensateMangling = D->isCXXClassMember() &&
-      !Parameter->getType()->isReferenceType();
+    bool compensateMangling = !Parameter->getType()->isReferenceType();
     if (compensateMangling) {
       Out << 'X';
       mangleOperatorName(OO_Amp, 1);

clang/test/CodeGenCXX/mangle.cpp

@@ -664,3 +664,15 @@ namespace test24 {
     foo();
   }
 }
+
+// rdar://problem/8806641
+namespace test25 {
+  template <void (*fn)()> struct A {
+    static void call() { fn(); }
+  };
+  void foo();
+  void test() {
+    // CHECK: call void @_ZN6test251AIXadL_ZNS_3fooEvEEE4callEv()
+    A<foo>::call();
+  }
+}