Correctly mangle variadic functions that don't have any other parameters.

llvm-svn: 105311

clang/lib/CodeGen/Mangle.cpp

@@ -1143,7 +1143,8 @@ void CXXNameMangler::mangleBareFunctionType(const FunctionType *T,
   if (MangleReturnType)
     mangleType(Proto->getResultType());
 
-  if (Proto->getNumArgs() == 0) {
+  if (Proto->getNumArgs() == 0 && !Proto->isVariadic()) {
+    //   <builtin-type> ::= v	# void
     Out << 'v';
     return;
   }

clang/test/CodeGenCXX/mangle.cpp

@@ -477,3 +477,15 @@ namespace test10 {
   // CHECK: define weak_odr void @_ZN6test101fILc3EEEvNS_1SIXquLb0ELc97ET_EEE(
   template void f<(char) 3>(struct S<3>);
 }
+
+namespace test11 {
+  // CHECK: @_ZN6test111fEz
+  void f(...) { }
+
+  struct A {
+    void f(...);
+  };
+  
+  // CHECK: @_ZN6test111A1fEz
+  void A::f(...) { }
+}