[SYCL] Adds extensive testing for SYCL2020 implicitly device copyable types.

SYCL/Basic/device_implicitly_copyable.cpp

@@ -0,0 +1,376 @@
+// RUN: %clangxx -fsycl -fsycl-targets=%sycl_triple %s -o %t.out
+// RUN: %CPU_RUN_PLACEHOLDER %t.out
+// RUN: %GPU_RUN_PLACEHOLDER %t.out
+// RUN: %ACC_RUN_PLACEHOLDER %t.out
+
+//==--device_implicitly_copyable.cpp - SYCL implicit device copyable test --==//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+#include <cassert>
+#include <iostream>
+
+#include <sycl/sycl.hpp>
+
+struct ACopyable {
+  int i;
+  ACopyable() = default;
+  ACopyable(int _i) : i(_i) {}
+  ACopyable(const ACopyable &x) : i(x.i) {}
+};
+
+template <> struct sycl::is_device_copyable<ACopyable> : std::true_type {};
+
+template <typename DataT, size_t ArrSize>
+void CaptureAndCopy(const DataT *data_arr, const DataT &data_scalar,
+                    DataT *result_arr, DataT *result_scalar, sycl::queue &q) {
+  // We need to copy data_arr, otherwise when using a device it tries to use the host memory
+  DataT cpy_data_arr[ArrSize];
+  std::memcpy(cpy_data_arr, data_arr, sizeof(cpy_data_arr));
+  sycl::buffer<DataT, 1> buf_arr{result_arr, sycl::range<1>(ArrSize)};
+  sycl::buffer<DataT, 1> buf_scalar{result_scalar, sycl::range<1>(1)};
+
+  q.submit([&](sycl::handler &cgh) {
+    auto acc_arr = sycl::accessor{buf_arr, cgh, sycl::read_write};
+    auto acc_scalar = sycl::accessor{buf_scalar, cgh, sycl::read_write};
+    cgh.single_task([=]() {
+      for (auto i = 0; i < ArrSize; i++) {
+        acc_arr[i] = cpy_data_arr[i];
+      }
+      acc_scalar[0] = data_scalar;
+    });
+  });
+}
+
+int main() {
+  constexpr size_t arr_size = 5;
+  constexpr int ref_val = 14;
+  sycl::queue q;
+  {
+    using DataT = std::pair<int, float>;
+    DataT pair_arr[arr_size];
+    DataT pair{ref_val, ref_val};
+    DataT result_pair_arr[arr_size];
+    DataT result_pair;
+
+    for (auto i = 0; i < arr_size; i++) {
+      pair_arr[i].first = i;
+      pair_arr[i].second = i;
+    }
+
+    CaptureAndCopy<DataT, arr_size>(pair_arr, pair, result_pair_arr,
+                                    &result_pair, q);
+
+    for (auto i = 0; i < arr_size; i++) {
+      assert(result_pair_arr[i].first == i);
+      assert(result_pair_arr[i].second == i);
+    }
+    assert(result_pair.first == ref_val && result_pair.second == ref_val);
+  }
+
+  {
+    using DataT = std::pair<ACopyable, float>;
+    DataT pair_arr[arr_size];
+    DataT pair{ACopyable(ref_val), ref_val};
+    DataT result_pair_arr[arr_size];
+    DataT result_pair;
+
+    for (auto i = 0; i < arr_size; i++) {
+      pair_arr[i].first = ACopyable(i);
+      pair_arr[i].second = i;
+    }
+
+    CaptureAndCopy<DataT, arr_size>(pair_arr, pair, result_pair_arr,
+                                    &result_pair, q);
+
+    for (auto i = 0; i < arr_size; i++) {
+      assert(result_pair_arr[i].first.i == i);
+      assert(result_pair_arr[i].second == i);
+    }
+    assert(result_pair.first.i == ref_val && result_pair.second == ref_val);
+  }
+
+  {
+    using DataT = std::tuple<int, float, bool>;
+    DataT tuple_arr[arr_size];
+    DataT tuple{ref_val, ref_val, true};
+    DataT result_tuple_arr[arr_size];
+    DataT result_tuple;
+
+    for (auto i = 0; i < arr_size; i++) {
+      auto &t = tuple_arr[i];
+      std::get<0>(t) = i;
+      std::get<1>(t) = i;
+      std::get<2>(t) = true;
+    }
+
+    CaptureAndCopy<DataT, arr_size>(tuple_arr, tuple, result_tuple_arr,
+                                    &result_tuple, q);
+
+    for (auto i = 0; i < arr_size; i++) {
+      auto t = result_tuple_arr[i];
+      assert(std::get<0>(t) == i);
+      assert(std::get<1>(t) == i);
+      assert(std::get<2>(t) == true);
+    }
+    assert(std::get<0>(result_tuple) == ref_val);
+    assert(std::get<1>(result_tuple) == ref_val);
+    assert(std::get<2>(result_tuple) == true);
+  }
+
+  {
+    using DataT = std::tuple<ACopyable, float, bool>;
+    DataT tuple_arr[arr_size];
+    DataT tuple{ACopyable(ref_val), ref_val, true};
+    DataT result_tuple_arr[arr_size];
+    DataT result_tuple;
+
+    for (auto i = 0; i < arr_size; i++) {
+      auto &t = tuple_arr[i];
+      std::get<0>(t) = ACopyable(i);
+      std::get<1>(t) = i;
+      std::get<2>(t) = true;
+    }
+
+    CaptureAndCopy<DataT, arr_size>(tuple_arr, tuple, result_tuple_arr,
+                                    &result_tuple, q);
+
+    for (auto i = 0; i < arr_size; i++) {
+      auto t = result_tuple_arr[i];
+      assert(std::get<0>(t).i == i);
+      assert(std::get<1>(t) == i);
+      assert(std::get<2>(t) == true);
+    }
+    assert(std::get<0>(result_tuple).i == ref_val);
+    assert(std::get<1>(result_tuple) == ref_val);
+    assert(std::get<2>(result_tuple) == true);
+  }
+
+  {
+    using DataT = std::variant<int, float, bool>;
+    DataT variant_arr[arr_size];
+    DataT variant{14};
+    DataT result_variant_arr[arr_size];
+    DataT result_variant;
+
+    constexpr int variant_size = 3;
+    for (auto i = 0; i < arr_size; i++) {
+      auto &v = variant_arr[i];
+      auto index = i % variant_size;
+      if (index == 0) {
+        v = i;
+      } else if (index == 1) {
+        v = (float)i;
+      } else {
+        v = true;
+      }
+    }
+
+    CaptureAndCopy<DataT, arr_size>(variant_arr, variant, result_variant_arr,
+                                    &result_variant, q);
+
+    for (auto i = 0; i < arr_size; i++) {
+      auto v = result_variant_arr[i];
+      auto index = i % variant_size;
+      if (index == 0) {
+        assert(std::get<0>(v) == i);
+      } else if (index == 1) {
+        assert(std::get<1>(v) == i);
+      } else {
+        assert(std::get<2>(v) == true);
+      }
+    }
+    assert(std::get<0>(result_variant) == ref_val);
+  }
+
+  {
+    using DataT = std::variant<ACopyable>;
+    DataT variant_arr[arr_size];
+    DataT variant;
+    DataT result_variant_arr[arr_size];
+    DataT result_variant;
+    q.submit([&](sycl::handler &cgh) {
+       cgh.single_task([=]() {
+         // Some implementations of std::variant with complex types relies on
+         // virtual functions, so they cannot be used within sycl kernels
+         auto size = sizeof(variant_arr[0]);
+         size = sizeof(variant);
+       });
+     }).wait_and_throw();
+  }
+
+  {
+    using DataT = std::array<int, arr_size>;
+    DataT arr_arr[arr_size];
+    DataT arr;
+    DataT result_arr_arr[arr_size];
+    DataT result_arr;
+
+    for (auto i = 0; i < arr_size; i++) {
+      auto &a = arr_arr[i];
+      for (auto j = 0; j < arr_size; j++) {
+        a[j] = j;
+      }
+      arr[i] = i;
+    }
+
+    CaptureAndCopy<DataT, arr_size>(arr_arr, arr, result_arr_arr, &result_arr,
+                                    q);
+
+    for (auto i = 0; i < arr_size; i++) {
+      auto a = result_arr_arr[i];
+      for (auto j = 0; j < arr_size; j++) {
+        assert(a[j] == j);
+      }
+      assert(result_arr[i] == i);
+    }
+  }
+
+  {
+    using DataT = std::array<ACopyable, arr_size>;
+    DataT arr_arr[arr_size];
+    DataT arr;
+    DataT result_arr_arr[arr_size];
+    DataT result_arr;
+
+    for (auto i = 0; i < arr_size; i++) {
+      auto &a = arr_arr[i];
+      for (auto j = 0; j < arr_size; j++) {
+        a[j] = ACopyable(j);
+      }
+      arr[i] = ACopyable(i);
+    }
+
+    CaptureAndCopy<DataT, arr_size>(arr_arr, arr, result_arr_arr, &result_arr,
+                                    q);
+
+    for (auto i = 0; i < arr_size; i++) {
+      auto a = result_arr_arr[i];
+      for (auto j = 0; j < arr_size; j++) {
+        assert(a[j].i == j);
+      }
+      assert(result_arr[i].i == i);
+    }
+  }
+
+  {
+    using DataT = std::optional<int>;
+    DataT opt_arr[arr_size];
+    DataT opt;
+    DataT result_opt_arr[arr_size];
+    DataT result_opt;
+
+    for (auto i = 0; i < arr_size; i++) {
+      opt_arr[i] = i;
+    }
+    opt = ref_val;
+
+    CaptureAndCopy<DataT, arr_size>(opt_arr, opt, result_opt_arr, &result_opt,
+                                    q);
+
+    for (auto i = 0; i < arr_size; i++) {
+      assert(result_opt_arr[i] == i);
+    }
+
+    assert(result_opt == ref_val);
+  }
+
+  {
+    using DataT = std::optional<ACopyable>;
+    DataT opt_arr[arr_size];
+    DataT opt;
+    DataT result_opt_arr[arr_size];
+    DataT result_opt;
+
+    for (auto i = 0; i < arr_size; i++) {
+      opt_arr[i] = ACopyable(i);
+    }
+    opt = ACopyable(ref_val);
+
+    CaptureAndCopy<DataT, arr_size>(opt_arr, opt, result_opt_arr, &result_opt,
+                                    q);
+
+    for (auto i = 0; i < arr_size; i++) {
+      assert(result_opt_arr[i]->i == i);
+    }
+
+    assert(result_opt->i == ref_val);
+  }
+
+  {
+    using DataT = std ::string_view;
+    std::string strv_arr_val[arr_size];
+    std::string strv_val{std::to_string(ref_val)};
+    DataT strv_arr[arr_size];
+    DataT strv{strv_val};
+    DataT result_strv_arr[arr_size];
+    DataT result_strv;
+
+    for (auto i = 0; i < arr_size; i++) {
+      strv_arr_val[i] = std::to_string(i);
+      strv_arr[i] = std::string_view{strv_arr_val[i]};
+    }
+
+    CaptureAndCopy<DataT, arr_size>(strv_arr, strv, result_strv_arr,
+                                    &result_strv, q);
+
+    for (auto i = 0; i < arr_size; i++) {
+      assert(result_strv_arr[i] == std::to_string(i));
+    }
+
+    assert(result_strv == std::to_string(ref_val));
+  }
+
+#if __cpp_lib_span >= 202002
+  {
+    using DataT = std::span<int>;
+    std::vector<int> v(arr_size);
+    DataT s_arr[arr_size];
+    DataT s{v.data(), arr_size};
+    DataT result_s_arr[arr_size];
+    DataT result_s{v.data(), arr_size};
+
+    for (auto i = 0; i < arr_size; i++) {
+      s[i] = i;
+      s_arr[i] = s;
+    }
+
+    CaptureAndCopy<DataT, arr_size>(s_arr, s, result_s_arr, &result_s, q);
+
+    for (auto i = 0; i < arr_size; i++) {
+      assert(result_s[i] == i);
+      for (auto j = 0; j < arr_size; j++) {
+        assert(result_s_arr[i][j] == j);
+      }
+    }
+  }
+#endif
+
+  {
+    using DataT = sycl::span<int>;
+    std::vector<int> v(arr_size);
+    DataT s_arr[arr_size];
+    DataT s{v.data(), arr_size};
+    DataT result_s_arr[arr_size];
+    DataT result_s{v.data(), arr_size};
+
+    for (auto i = 0; i < arr_size; i++) {
+      s[i] = i;
+      s_arr[i] = s;
+    }
+
+    CaptureAndCopy<DataT, arr_size>(s_arr, s, result_s_arr, &result_s, q);
+
+    for (auto i = 0; i < arr_size; i++) {
+      assert(result_s[i] == i);
+      for (auto j = 0; j < arr_size; j++) {
+        assert(result_s_arr[i][j] == j);
+      }
+    }
+  }
+
+  std::cout << "Test passed" << std::endl;
+}