@@ -955,7 +955,9 @@ static bool
function_requirements_equivalent_p (tree newfn, tree oldfn)
{
/* In the concepts TS, the combined constraints are compared. */
- if (cxx_dialect < cxx20)
+ if (cxx_dialect < cxx20
+ && (DECL_TEMPLATE_SPECIALIZATION (newfn)
+ <= DECL_TEMPLATE_SPECIALIZATION (oldfn)))
{
tree ci1 = get_constraints (oldfn);
tree ci2 = get_constraints (newfn);
new file mode 100644
@@ -0,0 +1,9 @@
+// PR c++/101098
+// { dg-do compile { target concepts } }
+
+template<typename T> concept C = __is_class(T);
+struct Y { int n; } y;
+template<C T> void g(T) { }
+int called;
+template<> void g(Y) { called = 3; }
+int main() { g(y); }