[gcc r13-8798] c++: array of PMF [PR113598]

[Jason Merrill]

https://gcc.gnu.org/g:5f1457841abc2fd8657a52d1371c983ac010f1cc

commit r13-8798-g5f1457841abc2fd8657a52d1371c983ac010f1cc
Author: Jason Merrill <jason@redhat.com>
Date:   Thu Jan 25 12:02:07 2024 -0500

    c++: array of PMF [PR113598]
    
    Here AGGREGATE_TYPE_P includes pointers to member functions, which is not
    what we want.  Instead we should use class||array, as elsewhere in the
    function.
    
            PR c++/113598
    
    gcc/cp/ChangeLog:
    
            * init.cc (build_vec_init): Don't use {} for PMF.
    
    gcc/testsuite/ChangeLog:
    
            * g++.dg/cpp0x/initlist-pmf2.C: New test.
    
    (cherry picked from commit 136a828754ff65079a834555582b49d54bd5bc64)

Diff:
---
 gcc/cp/init.cc                             |  4 +++-
 gcc/testsuite/g++.dg/cpp0x/initlist-pmf2.C | 12 ++++++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/gcc/cp/init.cc b/gcc/cp/init.cc
index 78e992af171..4977ce34398 100644
--- a/gcc/cp/init.cc
+++ b/gcc/cp/init.cc
@@ -4859,7 +4859,9 @@ build_vec_init (tree base, tree maxindex, tree init,
 	 But for non-classes, that's the same as value-initialization.  */
       if (empty_list)
 	{
-	  if (cxx_dialect >= cxx11 && AGGREGATE_TYPE_P (type))
+	  if (cxx_dialect >= cxx11
+	      && (CLASS_TYPE_P (type)
+		  || TREE_CODE (type) == ARRAY_TYPE))
 	    {
 	      init = build_constructor (init_list_type_node, NULL);
 	    }
diff --git a/gcc/testsuite/g++.dg/cpp0x/initlist-pmf2.C b/gcc/testsuite/g++.dg/cpp0x/initlist-pmf2.C
new file mode 100644
index 00000000000..0fac8333c75
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/initlist-pmf2.C
@@ -0,0 +1,12 @@
+// PR c++/113598
+// { dg-additional-options -Wno-c++11-extensions }
+
+struct Cpu
+{
+  int op_nop();
+};
+typedef int(Cpu::*OpCode)();
+void f()
+{
+  new OpCode[256]{&Cpu::op_nop};
+}