[SYCL] Add a test for pointer queries with a descendent device

SYCL/USM/pointer_query_descendent_device.cpp

@@ -0,0 +1,60 @@
+// RUN: %clangxx -fsycl %s -o %t1.out
+// RUN: %GPU_RUN_PLACEHOLDER %t1.out
+
+// Use of descendent devices in opencl contexts is not supported yet.
+// UNSUPPORTED: opencl
+//==------ pointer_query_descendent_device.cpp - Pointer Query 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 <CL/sycl.hpp>
+#include <cassert>
+
+std::vector<sycl::device> getSubDevices(sycl::device &Dev) {
+  uint32_t MaxSubDevices =
+      Dev.get_info<sycl::info::device::partition_max_sub_devices>();
+  if (MaxSubDevices == 0)
+    return {};
+  try {
+    return Dev
+        .create_sub_devices<sycl::info::partition_property::partition_equally>(
+            1);
+  } catch (sycl::exception &e) {
+    assert(e.code() == sycl::errc::feature_not_supported);
+  }
+  try {
+    std::vector<size_t> Counts(MaxSubDevices, 1);
+    return Dev.create_sub_devices<
+        sycl::info::partition_property::partition_by_counts>(Counts);
+  } catch (sycl::exception &e) {
+    assert(e.code() == sycl::errc::feature_not_supported);
+  }
+  try {
+    return Dev.create_sub_devices<
+        sycl::info::partition_property::partition_by_affinity_domain>(
+        sycl::info::partition_affinity_domain::next_partitionable);
+  } catch (sycl::exception &e) {
+    assert(e.code() == sycl::errc::feature_not_supported);
+  }
+  assert(false &&
+         "MaxSubDevices is not 0, but none of the partition types worked");
+  return {};
+}
+
+int main() {
+  sycl::device Dev;
+  sycl::context Ctx{Dev};
+
+  std::vector<sycl::device> SubDevices = getSubDevices(Dev);
+  if (SubDevices.empty())
+    return 0;
+  sycl::queue Q{Ctx, SubDevices[0]};
+  void *Data = sycl::malloc_device(64, Q);
+  assert(sycl::get_pointer_type(Data, Ctx) == sycl::usm::alloc::device);
+  assert(sycl::get_pointer_device(Data, Ctx) == SubDevices[0]);
+
+  free(Data, Ctx);
+}