[SYCL] Add test for classes implicitly converted from items in parallel_for

SYCL/Basic/parallel_for_user_types.cpp

@@ -0,0 +1,79 @@
+// RUN: %clangxx -fsycl -fsycl-targets=%sycl_triple %s -o %t.out
+// RUN: %HOST_RUN_PLACEHOLDER %t.out
+// RUN: %CPU_RUN_PLACEHOLDER %t.out
+// RUN: %GPU_RUN_PLACEHOLDER %t.out
+// RUN: %ACC_RUN_PLACEHOLDER %t.out
+
+// This test performs basic check of supporting user defined class that are
+// implicitly converted from sycl::item/sycl::nd_item in parallel_for.
+
+#include <CL/sycl.hpp>
+#include <iostream>
+
+template <int Dimensions> class item_wrapper {
+public:
+  item_wrapper(sycl::item<Dimensions> it) : m_item(it) {}
+
+  size_t get() { return m_item; }
+
+private:
+  sycl::item<Dimensions> m_item;
+};
+
+template <int Dimensions> class nd_item_wrapper {
+public:
+  nd_item_wrapper(sycl::nd_item<Dimensions> it) : m_item(it) {}
+
+  size_t get() { return m_item.get_global_linear_id(); }
+
+private:
+  sycl::nd_item<Dimensions> m_item;
+};
+
+int main() {
+  sycl::queue q;
+
+  // Initialize data array
+  const int sz = 16;
+  int data[sz] = {0};
+  for (int i = 0; i < sz; ++i) {
+    data[i] = i;
+  }
+
+  // Check user defined sycl::item wrapper
+  sycl::buffer<int> data_buf(data, sz);
+  q.submit([&](sycl::handler &h) {
+    auto buf_acc = data_buf.get_access<sycl::access::mode::read_write>(h);
+    h.parallel_for(sycl::range<1>{sz},
+                   [=](item_wrapper<1> item) { buf_acc[item.get()] += 1; });
+  });
+  q.wait();
+  bool failed = false;
+
+  for (int i = 0; i < sz; ++i) {
+    failed |= (data[i] != i + 1);
+  }
+  if (failed) {
+    std::cout << "item_wrapper check failed" << std::endl;
+    return 1;
+  }
+
+  // Check user defined sycl::nd_item wrapper
+  q.submit([&](sycl::handler &h) {
+    auto buf_acc = data_buf.get_access<sycl::access::mode::read_write>(h);
+    h.parallel_for(sycl::nd_range<1>{sz, 2},
+                   [=](nd_item_wrapper<1> item) { buf_acc[item.get()] += 1; });
+  });
+  q.wait();
+
+  for (int i = 0; i < sz; ++i) {
+    failed |= (data[i] != i + 2);
+  }
+  if (failed) {
+    std::cout << "nd_item_wrapper check failed" << std::endl;
+    return 1;
+  }
+
+  std::cout << "Test passed" << std::endl;
+  return 0;
+}