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      1 // RUN: %clang_cc1 -emit-llvm -triple %itanium_abi_triple -g %s -o - -fno-standalone-debug | FileCheck %s
      2 
      3 // Run again with -gline-tables-only and verify we don't crash.  We won't output
      4 // type info at all.
      5 // RUN: %clang_cc1 -emit-llvm -triple %itanium_abi_triple -g %s -o - -gline-tables-only | FileCheck %s -check-prefix LINES-ONLY
      6 
      7 // LINES-ONLY-NOT: DW_TAG_structure_type
      8 
      9 template <typename T>
     10 struct a {
     11 };
     12 extern template class a<int>;
     13 // CHECK-NOT: ; [ DW_TAG_structure_type ] [a<int>]
     14 
     15 template <typename T>
     16 struct b {
     17 };
     18 extern template class b<int>;
     19 b<int> bi;
     20 // CHECK: ; [ DW_TAG_structure_type ] [b<int>] {{.*}} [def]
     21 
     22 template <typename T>
     23 struct c {
     24   void f() {}
     25 };
     26 extern template class c<int>;
     27 c<int> ci;
     28 // CHECK: ; [ DW_TAG_structure_type ] [c<int>] {{.*}} [decl]
     29 
     30 template <typename T>
     31 struct d {
     32   void f();
     33 };
     34 extern template class d<int>;
     35 d<int> di;
     36 // CHECK: ; [ DW_TAG_structure_type ] [d<int>] {{.*}} [def]
     37 
     38 template <typename T>
     39 struct e {
     40   void f();
     41 };
     42 template <typename T>
     43 void e<T>::f() {
     44 }
     45 extern template class e<int>;
     46 e<int> ei;
     47 // There's no guarantee that the out of line definition will appear before the
     48 // explicit template instantiation definition, so conservatively emit the type
     49 // definition here.
     50 // CHECK: ; [ DW_TAG_structure_type ] [e<int>] {{.*}} [def]
     51 
     52 template <typename T>
     53 struct f {
     54   void g();
     55 };
     56 extern template class f<int>;
     57 template <typename T>
     58 void f<T>::g() {
     59 }
     60 f<int> fi;
     61 // CHECK: ; [ DW_TAG_structure_type ] [f<int>] {{.*}} [def]
     62 
     63 template <typename T>
     64 struct g {
     65   void f();
     66 };
     67 template <>
     68 void g<int>::f();
     69 extern template class g<int>;
     70 g<int> gi;
     71 // CHECK: ; [ DW_TAG_structure_type ] [g<int>] {{.*}} [def]
     72 
     73 template <typename T>
     74 struct h {
     75 };
     76 template class h<int>;
     77 // CHECK: ; [ DW_TAG_structure_type ] [h<int>] {{.*}} [def]
     78 
     79 template <typename T>
     80 struct i {
     81   void f() {}
     82 };
     83 template<> void i<int>::f();
     84 extern template class i<int>;
     85 i<int> ii;
     86 // CHECK: ; [ DW_TAG_structure_type ] [i<int>] {{.*}} [def]
     87 
     88 template <typename T1, typename T2 = T1>
     89 struct j {
     90 };
     91 extern template class j<int>;
     92 j<int> jj;
     93 // CHECK: ; [ DW_TAG_structure_type ] [j<int, int>]
     94