text: // RUN: %clang_cc1 -std=c++11 -emit-llvm -triple=x86_64-apple-darwin9 -o - %s | FileCheck %s
  
  template<unsigned I, typename ...Types>
  struct X { };
  
  template<typename T> struct identity { using type = T; };
  template<typename T> struct add_reference;
  template<typename ...Types> struct tuple { };
  template<int ...Values> struct int_tuple { };
  template<template<typename> class ...Templates> struct template_tuple { };
  template<typename ...T> using ArrayOfN = int[sizeof...(T)];
  
  // CHECK-LABEL: define weak_odr void @_Z2f0IJEEv1XIXsZT_EJDpRT_EE
  template<typename ...Types>
  void f0(X<sizeof...(Types), Types&...>) { }
  
  template void f0(X<0>);
  
  // CHECK-LABEL: define weak_odr void @_Z2f0IJifdEEv1XIXsZT_EJDpRT_EE
  template void f0<int, float, double>(X<3, int&, float&, double&>);
  
  // Mangling for template argument packs
  template<typename ...Types> void f1() {}
  // CHECK-LABEL: define weak_odr void @_Z2f1IJEEvv
  template void f1<>();
  // CHECK-LABEL: define weak_odr void @_Z2f1IJiEEvv
  template void f1<int>();
  // CHECK-LABEL: define weak_odr void @_Z2f1IJifEEvv
  template void f1<int, float>();
  
  // Mangling function parameter packs
  template<typename ...Types> void f2(Types...) {}
  // CHECK-LABEL: define weak_odr void @_Z2f2IJEEvDpT_
  template void f2<>();
  // CHECK-LABEL: define weak_odr void @_Z2f2IJiEEvDpT_
  template void f2<int>(int);
  // CHECK-LABEL: define weak_odr void @_Z2f2IJifEEvDpT_
  template void f2<int, float>(int, float);
  
  // Mangling non-trivial function parameter packs
  template<typename ...Types> void f3(const Types *...) {}
  // CHECK-LABEL: define weak_odr void @_Z2f3IJEEvDpPKT_
  template void f3<>();
  // CHECK-LABEL: define weak_odr void @_Z2f3IJiEEvDpPKT_
  template void f3<int>(const int*);
  // CHECK-LABEL: define weak_odr void @_Z2f3IJifEEvDpPKT_
  template void f3<int, float>(const int*, const float*);
  
  // Mangling of type pack expansions in a template argument
  template<typename ...Types> tuple<Types...> f4() {}
  // CHECK-LABEL: define weak_odr void @_Z2f4IJifdEE5tupleIJDpT_EEv
  template tuple<int, float, double> f4();
  
  // Mangling of type pack expansions in a function type
  template<typename R, typename ...ArgTypes> identity<R(ArgTypes...)> f5() {}
  // CHECK-LABEL: define weak_odr void @_Z2f5IiJifdEE8identityIFT_DpT0_EEv
  template identity<int(int, float, double)> f5();
  
  // Mangling of non-type template argument expansions
  template<int ...Values> int_tuple<Values...> f6() {}
  // CHECK-LABEL: define weak_odr void @_Z2f6IJLi1ELi2ELi3EEE9int_tupleIJXspT_EEEv
  template int_tuple<1, 2, 3> f6();
  
  // Mangling of template template argument expansions
  template<template<typename> class ...Templates> 
  template_tuple<Templates...> f7() {}
  // CHECK-LABEL: define weak_odr void @_Z2f7IJ8identity13add_referenceEE14template_tupleIJDpT_EEv
  template template_tuple<identity, add_reference> f7();
  
  template<typename T, typename ...U> void f8(ArrayOfN<int, U..., T, typename U::type...>&) {}
  // CHECK-LABEL: define weak_odr void @_Z2f8IiJ8identityIiES0_IfEEEvRAsPiDpT0_T_DpNS3_4typeEE_i
  template void f8<int, identity<int>, identity<float>>(int (&)[6]);
  
  template<typename ...T> void f10(ArrayOfN<T...> &) {}
  // FIXME: This is wrong; should be @_Z3f10IJifEEvRAsZT__i
  // CHECK-LABEL: define weak_odr void @_Z3f10IJifEEvRAsPDpT_E_i
  template void f10<int, float>(int (&)[2]);
  