The following testcase is fixed in GCC 12+
Tested on x86_64-unknown-linux-gnu, pushed.
PR tree-optimization/102801
gcc/testsuite/
* g++.dg/warn/Wuninitialized-33.C: New testcase.
---
gcc/testsuite/g++.dg/warn/Wuninitialized-33.C | 55 +++++++++++++++++++
1 file changed, 55 insertions(+)
create mode 100644 gcc/testsuite/g++.dg/warn/Wuninitialized-33.C
diff --git a/gcc/testsuite/g++.dg/warn/Wuninitialized-33.C
b/gcc/testsuite/g++.dg/warn/Wuninitialized-33.C
new file mode 100644
index 00000000000..1bb0639ee30
--- /dev/null
+++ b/gcc/testsuite/g++.dg/warn/Wuninitialized-33.C
@@ -0,0 +1,55 @@
+// PR102801
+// { dg-do compile }
+// { dg-require-effective-target c++17 }
+// { dg-options "-O2 -Wall" }
+
+#include <algorithm>
+#include <memory>
+#include <optional>
+#include <string>
+#include <utility>
+#include <vector>
+
+class C {
+ bool b{}; // { dg-bogus "uninitialized" }
+
+ struct Shared {};
+ using SharedPtr = std::shared_ptr<const Shared>;
+
+ SharedPtr shared;
+
+public:
+ C() = delete;
+ C(bool bIn) : b(bIn) {}
+ ~C();
+ int someMethod() const;
+};
+
+using OptC = std::optional<C>;
+
+class C2 {
+ OptC c;
+public:
+ C2() = default;
+ C2(const C &cIn) : c(cIn) {}
+ ~C2();
+ void operator()() const;
+ void swap(C2 &o) { std::swap(c, o.c); }
+};
+
+
+template <typename T>
+class Q {
+ std::vector<T> queue;
+public:
+ void Add(std::vector<T> &items) {
+ for (T & item : items) {
+ queue.push_back(T());
+ item.swap(queue.back());
+ }
+ }
+ void Exec();
+};
+
+extern void foo(Q<C2> & q, std::vector<C2> &items);
+void foo(Q<C2> & q, std::vector<C2> &items) { q.Add(items); q.Exec(); }
--
2.35.3
