1 files changed, 38 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/debug/dwarf2/template-func-params-4.C b/gcc/testsuite/g++.dg/debug/dwarf2/template-func-params-4.C
new file mode 100644
index 000000000..85401b228
--- /dev/null
+++ b/gcc/testsuite/g++.dg/debug/dwarf2/template-func-params-4.C
@@ -0,0 +1,38 @@
+// Contributed by Dodji Seketeli <dodji@redhat.com>
+// Origin PR debug/30161
+// { dg-options "-std=c++0x -g -dA" }
+//
+// In theory the compiler instantiates count<int, char, long>,
+// count<char, long> and count<long>. In practice, only
+// count<int, char, long> is emitted, thanks to constant folding.
+// So in theory, each of the 3 instances of count yields a
+// DW_TAG_GNU_template_parameter_pack DIE, but in practise, there is only one
+// DW_TAG_GNU_template_parameter_pack as there is only count<int, char, long>
+// is emitted.
+// { dg-final { scan-assembler-times "DIE \\(0x\[^\n\]*\\) DW_TAG_GNU_template_parameter_pack" 1} }
+// { dg-final { scan-assembler-times "DIE \\(0x\[^\n\]*\\) DW_TAG_template_type_param" 3} }
+
+
+template <typename... Args> struct count;
+
+template <>
+struct count<>
+{
+  static const int value = 0;
+};
+
+template <typename T, typename... Args>
+struct count<T, Args...>
+{
+  static const int value = 1 + count<Args...>::value;
+};
+
+template<typename... P>
+int
+do_count()
+{
+  return count<P...>::value;
+}
+
+int c = do_count<int, char, long>();
+