Bootstrapped and regtested on x86_64-pc-linux-gnu, does this look
OK for trunk?
-- >8 --
It seems we don't maintain visibility flags for concepts either, so
min_vis_expr_r should ignore them for now, otherwise after r14-6789 we
incorrectly give function templates that use a concept-id in their
signature internal linkage.
PR c++/115283
gcc/cp/ChangeLog:
* decl2.cc (min_vis_expr_r) <case TEMPLATE_DECL>: Ignore
concepts.
gcc/testsuite/ChangeLog:
* g++.dg/template/linkage5.C: New test.
---
gcc/cp/decl2.cc | 5 +++--
gcc/testsuite/g++.dg/template/linkage5.C | 14 ++++++++++++++
2 files changed, 17 insertions(+), 2 deletions(-)
create mode 100644 gcc/testsuite/g++.dg/template/linkage5.C
diff --git a/gcc/cp/decl2.cc b/gcc/cp/decl2.cc
index 7baff46a192..88e87ad60c6 100644
--- a/gcc/cp/decl2.cc
+++ b/gcc/cp/decl2.cc
@@ -2723,9 +2723,10 @@ min_vis_expr_r (tree *tp, int */*walk_subtrees*/, void
*data)
break;
case TEMPLATE_DECL:
- if (DECL_ALIAS_TEMPLATE_P (t))
+ if (DECL_ALIAS_TEMPLATE_P (t) || concept_definition_p (t))
/* FIXME: We don't maintain TREE_PUBLIC / DECL_VISIBILITY for
- alias templates so we can't trust it here (PR107906). */
+ alias templates so we can't trust it here (PR107906). Ditto
+ for concepts. */
break;
t = DECL_TEMPLATE_RESULT (t);
/* Fall through. */
diff --git a/gcc/testsuite/g++.dg/template/linkage5.C
b/gcc/testsuite/g++.dg/template/linkage5.C
new file mode 100644
index 00000000000..1dbb0beb5ea
--- /dev/null
+++ b/gcc/testsuite/g++.dg/template/linkage5.C
@@ -0,0 +1,14 @@
+// PR c++/115283
+// { dg-final { scan-assembler "(weak|glob)\[^\n\]*_Z1fIiEv1AIX4sameIT_EEE" } }
+// { dg-do compile { target c++20 } }
+
+template<class T>
+concept same = true;
+
+template<bool B>
+struct A { };
+
+template<class T>
+void f(A<same<T>>) { }
+
+template void f<int>(A<true>);
--
2.45.2.457.g8d94cfb545
