1 // RUN: %clang_cc1 -std=c++11 -emit-llvm -triple=x86_64-apple-darwin9 -o - %s | FileCheck %s
2
3 template<unsigned I, typename ...Types>
4 struct X { };
5
6 template<typename T> struct identity { using type = T; };
7 template<typename T> struct add_reference;
8 template<typename ...Types> struct tuple { };
9 template<int ...Values> struct int_tuple { };
10 template<template<typename> class ...Templates> struct template_tuple { };
11 template<typename ...T> using ArrayOfN = int[sizeof...(T)];
12
13 // CHECK-LABEL: define weak_odr void @_Z2f0IJEEv1XIXsZT_EJDpRT_EE
14 template<typename ...Types>
f0(X<sizeof...(Types),Types &...>)15 void f0(X<sizeof...(Types), Types&...>) { }
16
17 template void f0(X<0>);
18
19 // CHECK-LABEL: define weak_odr void @_Z2f0IJifdEEv1XIXsZT_EJDpRT_EE
20 template void f0<int, float, double>(X<3, int&, float&, double&>);
21
22 // Mangling for template argument packs
f1()23 template<typename ...Types> void f1() {}
24 // CHECK-LABEL: define weak_odr void @_Z2f1IJEEvv
25 template void f1<>();
26 // CHECK-LABEL: define weak_odr void @_Z2f1IJiEEvv
27 template void f1<int>();
28 // CHECK-LABEL: define weak_odr void @_Z2f1IJifEEvv
29 template void f1<int, float>();
30
31 // Mangling function parameter packs
f2(Types...)32 template<typename ...Types> void f2(Types...) {}
33 // CHECK-LABEL: define weak_odr void @_Z2f2IJEEvDpT_
34 template void f2<>();
35 // CHECK-LABEL: define weak_odr void @_Z2f2IJiEEvDpT_
36 template void f2<int>(int);
37 // CHECK-LABEL: define weak_odr void @_Z2f2IJifEEvDpT_
38 template void f2<int, float>(int, float);
39
40 // Mangling non-trivial function parameter packs
f3(const Types * ...)41 template<typename ...Types> void f3(const Types *...) {}
42 // CHECK-LABEL: define weak_odr void @_Z2f3IJEEvDpPKT_
43 template void f3<>();
44 // CHECK-LABEL: define weak_odr void @_Z2f3IJiEEvDpPKT_
45 template void f3<int>(const int*);
46 // CHECK-LABEL: define weak_odr void @_Z2f3IJifEEvDpPKT_
47 template void f3<int, float>(const int*, const float*);
48
49 // Mangling of type pack expansions in a template argument
f4()50 template<typename ...Types> tuple<Types...> f4() {}
51 // CHECK-LABEL: define weak_odr void @_Z2f4IJifdEE5tupleIJDpT_EEv
52 template tuple<int, float, double> f4();
53
54 // Mangling of type pack expansions in a function type
f5()55 template<typename R, typename ...ArgTypes> identity<R(ArgTypes...)> f5() {}
56 // CHECK-LABEL: define weak_odr void @_Z2f5IiJifdEE8identityIFT_DpT0_EEv
57 template identity<int(int, float, double)> f5();
58
59 // Mangling of non-type template argument expansions
f6()60 template<int ...Values> int_tuple<Values...> f6() {}
61 // CHECK-LABEL: define weak_odr void @_Z2f6IJLi1ELi2ELi3EEE9int_tupleIJXspT_EEEv
62 template int_tuple<1, 2, 3> f6();
63
64 // Mangling of template template argument expansions
65 template<template<typename> class ...Templates>
f7()66 template_tuple<Templates...> f7() {}
67 // CHECK-LABEL: define weak_odr void @_Z2f7IJ8identity13add_referenceEE14template_tupleIJDpT_EEv
68 template template_tuple<identity, add_reference> f7();
69
f8(ArrayOfN<int,U...,T,typename U::type...> &)70 template<typename T, typename ...U> void f8(ArrayOfN<int, U..., T, typename U::type...>&) {}
71 // CHECK-LABEL: define weak_odr void @_Z2f8IiJ8identityIiES0_IfEEEvRAsPiDpT0_T_DpNS3_4typeEE_i
72 template void f8<int, identity<int>, identity<float>>(int (&)[6]);
73
f10(ArrayOfN<T...> &)74 template<typename ...T> void f10(ArrayOfN<T...> &) {}
75 // FIXME: This is wrong; should be @_Z3f10IJifEEvRAsZT__i
76 // CHECK-LABEL: define weak_odr void @_Z3f10IJifEEvRAsPDpT_E_i
77 template void f10<int, float>(int (&)[2]);
78