[SYCL] Adds regression test for PCI address BDF format (intel#991)

Signed-off-by: Larsen, Steffen <[email protected]>

Author: steffenlarsen

SYCL/Regression/device_pci_address_bdf_format.cpp

@@ -0,0 +1,55 @@
+// RUN: %clangxx -fsycl %s -o %t.out
+// RUN: %GPU_RUN_PLACEHOLDER %t.out
+
+//==- device_pci_address_bdf_format.cpp - SYCL PCI address BDF format test -==//
+//
+// Tests the BDF format of the PCI address reported through the corresponding
+// query.
+//
+// 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 <iostream>
+#include <regex>
+#include <string>
+
+using namespace cl::sycl;
+
+#ifdef _WIN32
+#define setenv(name, value, overwrite) _putenv_s(name, value)
+#endif
+
+int main(int argc, char **argv) {
+  // Must be enabled at the beginning of the application
+  // to obtain the PCI address
+  setenv("SYCL_ENABLE_PCI", "1", 0);
+
+  // Expected format is "{domain}:{bus}:{device}.{function} where:
+  // * {domain} is a 4 character hexadecimal value.
+  // * {bus} is a 2 character hexadecimal value.
+  // * {device} is a 2 character hexadecimal value.
+  // * {function} is a 1 character hexadecimal value.
+  const std::regex ExpectedBDFFormat{
+      "^[0-9a-fA-F]{4}:[0-9a-fA-F]{2}:[0-9a-fA-F]{2}.[0-9a-fA-F]$"};
+
+  for (const auto &plt : platform::get_platforms()) {
+    if (plt.has(aspect::host))
+      continue;
+    for (const auto &dev : plt.get_devices()) {
+      if (!dev.has(aspect::ext_intel_pci_address))
+        continue;
+
+      std::string PCIAddress =
+          dev.get_info<info::device::ext_intel_pci_address>();
+      std::cout << "PCI address = " << PCIAddress << std::endl;
+      assert(std::regex_match(PCIAddress, ExpectedBDFFormat));
+    }
+  }
+  std::cout << "Passed!" << std::endl;
+  return 0;
+}