1 files changed, 145 insertions, 0 deletions
diff --git a/pstl/test/test_rotate_copy.cpp b/pstl/test/test_rotate_copy.cpp
new file mode 100644
index 00000000000..1ca9f5504b0
--- /dev/null
+++ b/pstl/test/test_rotate_copy.cpp
@@ -0,0 +1,145 @@
+// -*- C++ -*-
+//===-- test_rotate_copy.cpp ----------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "pstl_test_config.h"
+
+#include <iterator>
+
+#include "pstl/execution"
+#include "pstl/algorithm"
+#include "utils.h"
+
+using namespace TestUtils;
+
+template <typename T>
+struct wrapper;
+
+template <typename T>
+bool
+compare(const wrapper<T>& a, const wrapper<T>& b)
+{
+    return a.t == b.t;
+}
+
+template <typename T>
+bool
+compare(const T& a, const T& b)
+{
+    return a == b;
+}
+
+template <typename T>
+struct wrapper
+{
+    explicit wrapper(T t_) : t(t_) {}
+    wrapper&
+    operator=(const T& t_)
+    {
+        t = t_;
+        return *this;
+    }
+    friend bool
+    compare<T>(const wrapper<T>& a, const wrapper<T>& b);
+
+  private:
+    T t;
+};
+
+template <typename T, typename It1, typename It2>
+struct comparator
+{
+    using T1 = typename std::iterator_traits<It1>::value_type;
+    using T2 = typename std::iterator_traits<It2>::value_type;
+    bool
+    operator()(T1 a, T2 b)
+    {
+        T temp = a;
+        return compare(temp, b);
+    }
+};
+
+struct test_one_policy
+{
+
+#if __PSTL_ICC_17_VC141_TEST_SIMD_LAMBDA_DEBUG_32_BROKEN ||                                                            \
+    __PSTL_ICC_16_VC14_TEST_SIMD_LAMBDA_DEBUG_32_BROKEN // dummy specialization by policy type, in case of broken configuration
+    template <typename Iterator1, typename Iterator2>
+    typename std::enable_if<is_same_iterator_category<Iterator1, std::random_access_iterator_tag>::value, void>::type
+    operator()(pstl::execution::unsequenced_policy, Iterator1 data_b, Iterator1 data_e, Iterator2 actual_b,
+               Iterator2 actual_e, std::size_t shift)
+    {
+    }
+    template <typename Iterator1, typename Iterator2>
+    typename std::enable_if<is_same_iterator_category<Iterator1, std::random_access_iterator_tag>::value, void>::type
+    operator()(pstl::execution::parallel_unsequenced_policy, Iterator1 data_b, Iterator1 data_e, Iterator2 actual_b,
+               Iterator2 actual_e, std::size_t shift)
+    {
+    }
+#endif
+
+    template <typename ExecutionPolicy, typename Iterator1, typename Iterator2>
+    void
+    operator()(ExecutionPolicy&& exec, Iterator1 data_b, Iterator1 data_e, Iterator2 actual_b, Iterator2 actual_e,
+               std::size_t shift)
+    {
+        using namespace std;
+        using T = typename iterator_traits<Iterator2>::value_type;
+        Iterator1 data_m = std::next(data_b, shift);
+
+        fill(actual_b, actual_e, T(-123));
+        Iterator2 actual_return = rotate_copy(exec, data_b, data_m, data_e, actual_b);
+
+        EXPECT_TRUE(actual_return == actual_e, "wrong result of rotate_copy");
+        auto comparer = comparator<T, Iterator1, Iterator2>();
+        bool check = std::equal(data_m, data_e, actual_b, comparer);
+        check = check && std::equal(data_b, data_m, std::next(actual_b, std::distance(data_m, data_e)), comparer);
+
+        EXPECT_TRUE(check, "wrong effect of rotate_copy");
+    }
+};
+
+template <typename T1, typename T2>
+void
+test()
+{
+
+    const std::size_t max_len = 100000;
+
+    Sequence<T2> actual(max_len, [](std::size_t i) { return T1(i); });
+
+    Sequence<T1> data(max_len, [](std::size_t i) { return T1(i); });
+
+    for (std::size_t len = 0; len < max_len; len = len <= 16 ? len + 1 : std::size_t(3.1415 * len))
+    {
+        std::size_t shifts[] = {0, 1, 2, len / 3, (2 * len) / 3, len - 1};
+        for (std::size_t shift : shifts)
+        {
+            if (shift > 0 && shift < len)
+            {
+                invoke_on_all_policies(test_one_policy(), data.begin(), data.begin() + len, actual.begin(),
+                                       actual.begin() + len, shift);
+                invoke_on_all_policies(test_one_policy(), data.cbegin(), data.cbegin() + len, actual.begin(),
+                                       actual.begin() + len, shift);
+            }
+        }
+    }
+}
+
+int32_t
+main()
+{
+    test<int32_t, int8_t>();
+    test<uint16_t, float32_t>();
+    test<float64_t, int64_t>();
+    test<wrapper<float64_t>, wrapper<float64_t>>();
+
+    std::cout << done() << std::endl;
+    return 0;
+}