Adds warning message to CUDA + removes calls it die() in Hip

Author: mfrancepillois

source/adapters/cuda/command_buffer.cpp

@@ -549,6 +549,11 @@ UR_APIEXPORT ur_result_t UR_APICALL urCommandBufferAppendUSMPrefetchExp(
     // Get sync point and register the cuNode with it.
     *pSyncPoint =
         hCommandBuffer->AddSyncPoint(std::make_shared<CUgraphNode>(GraphNode));
+
+    setErrorMessage("Prefetch hint ignored and replaced with empty node as "
+                    "prefetch is not supported by CUDA Graph backend",
+                    UR_RESULT_SUCCESS);
+    Result = UR_RESULT_ERROR_ADAPTER_SPECIFIC;
   } catch (ur_result_t Err) {
     Result = Err;
   }
@@ -579,6 +584,11 @@ UR_APIEXPORT ur_result_t UR_APICALL urCommandBufferAppendUSMAdviseExp(
     // Get sync point and register the cuNode with it.
     *pSyncPoint =
         hCommandBuffer->AddSyncPoint(std::make_shared<CUgraphNode>(GraphNode));
+
+    setErrorMessage("Memory advice ignored and replaced with empty node as "
+                    "memory advice is not supported by CUDA Graph backend",
+                    UR_RESULT_SUCCESS);
+    Result = UR_RESULT_ERROR_ADAPTER_SPECIFIC;
   } catch (ur_result_t Err) {
     Result = Err;
   }

source/adapters/hip/command_buffer.cpp

@@ -127,17 +127,13 @@ UR_APIEXPORT ur_result_t UR_APICALL urCommandBufferAppendUSMPrefetchExp(
     ur_usm_migration_flags_t, uint32_t,
     const ur_exp_command_buffer_sync_point_t *,
     ur_exp_command_buffer_sync_point_t *) {
-  detail::ur::die("Experimental Command-buffer feature is not "
-                  "implemented for HIP adapter.");
   return UR_RESULT_ERROR_UNSUPPORTED_FEATURE;
 }
 
 UR_APIEXPORT ur_result_t UR_APICALL urCommandBufferAppendUSMAdviseExp(
     ur_exp_command_buffer_handle_t, const void *, size_t, ur_usm_advice_flags_t,
     uint32_t, const ur_exp_command_buffer_sync_point_t *,
     ur_exp_command_buffer_sync_point_t *) {
-  detail::ur::die("Experimental Command-buffer feature is not "
-                  "implemented for HIP adapter.");
   return UR_RESULT_ERROR_UNSUPPORTED_FEATURE;
 }