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From: Richard Biener <rguenth@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org Subject: [gcc r13-2776] tree-optimization/102801 - testcase for uninit diagnostic Date: Thu, 22 Sep 2022 13:19:58 +0000 (GMT) [thread overview] Message-ID: <20220922131958.52269385C30F@sourceware.org> (raw) https://gcc.gnu.org/g:44dba051d72587828882cbb31118934a4fb06c1a commit r13-2776-g44dba051d72587828882cbb31118934a4fb06c1a Author: Richard Biener <rguenther@suse.de> Date: Thu Sep 22 15:18:47 2022 +0200 tree-optimization/102801 - testcase for uninit diagnostic The following testcase is fixed in GCC 12+ PR tree-optimization/102801 gcc/testsuite/ * g++.dg/warn/Wuninitialized-33.C: New testcase. Diff: --- gcc/testsuite/g++.dg/warn/Wuninitialized-33.C | 55 +++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) 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(); }
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