add test for GH1163191

Author: cor3ntin

clang/docs/ReleaseNotes.rst

@@ -379,7 +379,7 @@ Bug Fixes in This Version
 - Fixed an assertion when an improper use of the ``malloc`` attribute targeting
   a function without arguments caused us to try to access a non-existent argument.
   (#GH159080)
-- Fixed a failed assertion with empty filename arguments in ``__has_embed``. (#GH159898) (#GH56652)
+- Fixed a failed assertion with empty filename arguments in ``__has_embed``. (#GH159898)
 
 Bug Fixes to Compiler Builtins
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -433,7 +433,7 @@ Bug Fixes to C++ Support
   object type. (#GH151531)
 - Suppress ``-Wdouble-promotion`` when explicitly asked for with C++ list initialization (#GH33409).
 - Fix the result of `__builtin_is_implicit_lifetime` for types with a user-provided constructor. (#GH160610)
-- Correctly deduced return types in ``decltype`` expressions. (#GH160497)
+- Correctly deduced return types in ``decltype`` expressions. (#GH160497) (#GH56652) (#GH116319)
 
 Bug Fixes to AST Handling
 ^^^^^^^^^^^^^^^^^^^^^^^^^

clang/test/CodeGenCXX/gh56652.cpp

@@ -22,7 +22,20 @@ template <typename T> auto fn(T) {
 
 auto a = decltype(fn(bar<int>{})){};
 
+}
+
+namespace GH116319 {
+
+template <int = 0> struct a {
+template <class> static constexpr auto b = 2;
+template <class> static void c() noexcept(noexcept(b<int>)) {}
+};
+
+void test() { a<>::c<int>(); }
+
+
 }
 
 // CHECK: %"struct.GH56652::bar" = type { i8 }
+// CHECK: $_ZN8GH1163191aILi0EE1cIiEEvv = comdat any
 // CHECK: @_ZN7GH566521aE = global %"struct.GH56652::bar" undef