[offload] [test] Skip amdgcn/nvptx tests if detected arch is not built

Skip amdgcn and/or nvptx tests, if the detected GPU architecture
is not present among GPUs offload was built for.  Without this change,
the tests are run if any GPU is detected -- which could lead
to cryptic test failures, such as the ones reported in #118824.

Author: mgorny

offload/DeviceRTL/CMakeLists.txt

@@ -69,6 +69,9 @@ elseif(LIBOMPTARGET_DEVICE_ARCHITECTURES STREQUAL "auto" OR
       "${LIBOMPTARGET_NVPTX_DETECTED_ARCH_LIST};${LIBOMPTARGET_AMDGPU_DETECTED_ARCH_LIST}")
 endif()
 list(REMOVE_DUPLICATES LIBOMPTARGET_DEVICE_ARCHITECTURES)
+# for tests
+set(LIBOMPTARGET_EXPANDED_DEVICE_ARCHITECTURES ${LIBOMPTARGET_DEVICE_ARCHITECTURES}
+    PARENT_SCOPE)
 
 set(include_files
   ${include_directory}/Allocator.h

offload/test/CMakeLists.txt

@@ -37,6 +37,20 @@ string(REGEX MATCHALL "([^\ ]+\ |[^\ ]+$)" SYSTEM_TARGETS "${LIBOMPTARGET_SYSTEM
 foreach(CURRENT_TARGET IN LISTS SYSTEM_TARGETS)
   string(STRIP "${CURRENT_TARGET}" CURRENT_TARGET)
 
+  if(CURRENT_TARGET MATCHES "^amdgcn" AND
+     NOT "${LIBOMPTARGET_AMDGPU_DETECTED_ARCH_LIST}"
+         IN_LIST LIBOMPTARGET_EXPANDED_DEVICE_ARCHITECTURES)
+    message(WARNING "Detected AMDGPU arch ${LIBOMPTARGET_AMDGPU_DETECTED_ARCH_LIST} "
+                    "not in built arch list, ${CURRENT_TARGET} tests will be skipped")
+    continue()
+  elseif(CURRENT_TARGET MATCHES "^nvptx" AND
+     NOT "${LIBOMPTARGET_DEP_CUDA_ARCH}"
+         IN_LIST LIBOMPTARGET_EXPANDED_DEVICE_ARCHITECTURES)
+    message(WARNING "Detected NVPTX arch ${LIBOMPTARGET_DEP_CUDA_ARCH} "
+                    "not in built arch list, ${CURRENT_TARGET} tests will be skipped")
+    continue()
+  endif()
+
   add_offload_testsuite(check-libomptarget-${CURRENT_TARGET}
     "Running libomptarget tests"
     ${CMAKE_CURRENT_BINARY_DIR}/${CURRENT_TARGET}