Update Kokkos library in LAMMPS to v4.4.0

lib/kokkos/core/unit_test/TestViewOfViews.hpp

@@ -0,0 +1,75 @@
+//@HEADER
+// ************************************************************************
+//
+//                        Kokkos v. 4.0
+//       Copyright (2022) National Technology & Engineering
+//               Solutions of Sandia, LLC (NTESS).
+//
+// Under the terms of Contract DE-NA0003525 with NTESS,
+// the U.S. Government retains certain rights in this software.
+//
+// Part of Kokkos, under the Apache License v2.0 with LLVM Exceptions.
+// See https://kokkos.org/LICENSE for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//@HEADER
+
+#include <gtest/gtest.h>
+
+#include <Kokkos_Core.hpp>
+
+namespace {
+
+// User-defined type with a View data member
+template <class V>
+class S {
+  V v_;
+
+ public:
+  template <class... Extents>
+  S(std::string label, Extents... extents) : v_(std::move(label), extents...) {}
+  S() = default;
+};
+
+template <class V>
+void test_view_of_views() {
+  using VoV = Kokkos::View<V**, Kokkos::HostSpace>;
+  {  // assigning a default-constructed view to destruct the inner objects
+    VoV vov("vov", 2, 3);
+    V a("a");
+    V b("b");
+    vov(0, 0) = a;
+    vov(1, 0) = a;
+    vov(0, 1) = b;
+#ifndef KOKKOS_ENABLE_IMPL_VIEW_OF_VIEWS_DESTRUCTOR_PRECONDITION_VIOLATION_WORKAROUND
+    vov(0, 0) = V();
+    vov(1, 0) = V();
+    vov(0, 1) = V();
+#endif
+  }
+  {  // using placement new to construct the inner objects and explicitly
+     // calling the destructor
+    VoV vov(Kokkos::view_alloc("vov", Kokkos::WithoutInitializing), 2, 3);
+    V a("a");
+    V b("b");
+    new (&vov(0, 0)) V(a);
+    new (&vov(1, 0)) V(a);
+    new (&vov(0, 1)) V(b);
+#ifndef KOKKOS_ENABLE_IMPL_VIEW_OF_VIEWS_DESTRUCTOR_PRECONDITION_VIOLATION_WORKAROUND
+    vov(0, 0).~V();
+    vov(1, 0).~V();
+    vov(0, 1).~V();
+#else
+    // leaks memory
+#endif
+  }
+}
+
+TEST(TEST_CATEGORY, view_of_views) {
+  test_view_of_views<Kokkos::View<int, TEST_EXECSPACE>>();
+  test_view_of_views<Kokkos::View<int[4], TEST_EXECSPACE>>();
+  // User-defined type with View data member
+  test_view_of_views<S<Kokkos::View<float, TEST_EXECSPACE>>>();
+}
+
+}  // namespace