[gcc r13-3414] c++ modules: handle CONCEPT_DECL in node_template_info [PR102963]

[Patrick Palka <ppalka@gcc.gnu.org>]

https://gcc.gnu.org/g:9a8b37f5476ba1f92fd9a85add035ace89535e79

commit r13-3414-g9a8b37f5476ba1f92fd9a85add035ace89535e79
Author: Patrick Palka <ppalka@redhat.com>
Date:   Thu Oct 20 11:33:39 2022 -0400

    c++ modules: handle CONCEPT_DECL in node_template_info [PR102963]
    
    Here node_template_info is overlooking that CONCEPT_DECL has TEMPLATE_INFO
    too, which causes get_originating_module_decl for the CONCEPT_DECL to not
    return the corresponding TEMPLATE_DECL, which leads to an ICE from
    import_entity_index while pretty printing the CONCEPT_DECL's module
    suffix as part of the static assert failure elaboration.
    
            PR c++/102963
    
    gcc/cp/ChangeLog:
    
            * module.cc (node_template_info): Handle CONCEPT_DECL.
    
    gcc/testsuite/ChangeLog:
    
            * g++.dg/modules/concept-7_a.C: New test.
            * g++.dg/modules/concept-7_b.C: New test.

Diff:
---
 gcc/cp/module.cc                           | 1 +
 gcc/testsuite/g++.dg/modules/concept-7_a.C | 7 +++++++
 gcc/testsuite/g++.dg/modules/concept-7_b.C | 7 +++++++
 3 files changed, 15 insertions(+)

diff --git a/gcc/cp/module.cc b/gcc/cp/module.cc
index 2c2f9a9a8cb..73971e7ff47 100644
--- a/gcc/cp/module.cc
+++ b/gcc/cp/module.cc
@@ -4046,6 +4046,7 @@ node_template_info (tree decl, int &use)
 	       || TREE_CODE (decl) == TYPE_DECL
 	       || TREE_CODE (decl) == FUNCTION_DECL
 	       || TREE_CODE (decl) == FIELD_DECL
+	       || TREE_CODE (decl) == CONCEPT_DECL
 	       || TREE_CODE (decl) == TEMPLATE_DECL))
     {
       use_tpl = DECL_USE_TEMPLATE (decl);
diff --git a/gcc/testsuite/g++.dg/modules/concept-7_a.C b/gcc/testsuite/g++.dg/modules/concept-7_a.C
new file mode 100644
index 00000000000..a39b31bf7f0
--- /dev/null
+++ b/gcc/testsuite/g++.dg/modules/concept-7_a.C
@@ -0,0 +1,7 @@
+// PR c++/102963
+// { dg-additional-options "-fmodules-ts -fconcepts" }
+// { dg-module-cmi pr102963 }
+
+export module pr102963;
+
+export template<class T> concept C = __is_same(T, int);
diff --git a/gcc/testsuite/g++.dg/modules/concept-7_b.C b/gcc/testsuite/g++.dg/modules/concept-7_b.C
new file mode 100644
index 00000000000..1f81208ebd5
--- /dev/null
+++ b/gcc/testsuite/g++.dg/modules/concept-7_b.C
@@ -0,0 +1,7 @@
+// PR c++/102963
+// { dg-additional-options "-fmodules-ts -fconcepts" }
+
+import pr102963;
+
+static_assert(C<int>);
+static_assert(C<void>); // { dg-error "static assert" }