Tested x86_64-pc-linux-gnu, applying to trunk and 15.
-- 8< --
Here cxx_eval_vec_init_1 wants to recreate the default constructor call that
we previously built and threw away in build_vec_init_elt, but we aren't in
the same access context at this point. Since we already checked access,
let's just suppress access control here.
Redoing overload resolution at constant evaluation time is sketchy, but
should usually be fine for a default/copy constructor.
PR c++/120800
gcc/cp/ChangeLog:
* constexpr.cc (cxx_eval_vec_init_1): Suppress access control.
gcc/testsuite/ChangeLog:
* g++.dg/cpp0x/constexpr-array30.C: New test.
---
gcc/cp/constexpr.cc | 3 +++
.../g++.dg/cpp0x/constexpr-array30.C | 22 +++++++++++++++++++
2 files changed, 25 insertions(+)
create mode 100644 gcc/testsuite/g++.dg/cpp0x/constexpr-array30.C
diff --git a/gcc/cp/constexpr.cc b/gcc/cp/constexpr.cc
index e051a50fe16..be24ae2feda 100644
--- a/gcc/cp/constexpr.cc
+++ b/gcc/cp/constexpr.cc
@@ -6598,6 +6598,9 @@ cxx_eval_vec_init_1 (const constexpr_ctx *ctx, tree
atype, tree init,
return cxx_eval_bare_aggregate (ctx, init, lval,
non_constant_p, overflow_p, jump_target);
+ /* We already checked access when building the VEC_INIT_EXPR. */
+ deferring_access_check_sentinel acs (dk_deferred);
+
/* For the default constructor, build up a call to the default
constructor of the element type. We only need to handle class types
here, as for a constructor to be constexpr, all members must be
diff --git a/gcc/testsuite/g++.dg/cpp0x/constexpr-array30.C
b/gcc/testsuite/g++.dg/cpp0x/constexpr-array30.C
new file mode 100644
index 00000000000..3f724072e83
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/constexpr-array30.C
@@ -0,0 +1,22 @@
+// PR c++/120800
+// { dg-do compile { target c++11 } }
+
+template<typename T>
+struct Container
+{
+ T m_data[1] {};
+};
+
+class Element
+{
+private:
+ Element() = default;
+
+private:
+ bool m_bool1 { false };
+ bool m_bool2;
+
+ friend struct Container<Element>;
+};
+
+Container<Element> element;
base-commit: 0cd52ca158ae74cffd55c480888019990a6bed3f
--
2.50.1
