Added parfor lower message

numba/dppl/dppl_lowerer.py

@@ -1012,8 +1012,11 @@ def lower_parfor_rollback(lowerer, parfor):
 
     try:
         _lower_parfor_gufunc(lowerer, parfor)
+        if numba.dppl.compiler.DEBUG:
+            msg = "Parfor lowered on DPPL-device"
+            print(msg, parfor.loc)
     except Exception as e:
-        msg = ("Failed to lower parfor on GPU")
+        msg = "Failed to lower parfor on DPPL-device"
         warnings.warn(NumbaPerformanceWarning(msg, parfor.loc))
         raise e
     finally:

numba/dppl/tests/dppl/test_dppl_fallback.py

@@ -49,7 +49,7 @@ def run_dppl():
         ref_result = ref()
 
         np.testing.assert_array_equal(dppl_result, ref_result)
-        self.assertTrue('Failed to lower parfor on GPU' in err)
+        self.assertTrue('Failed to lower parfor on DPPL-device' in err)
 
 
 if __name__ == '__main__':

numba/dppl/tests/dppl/test_parfor_lower_message.py

@@ -0,0 +1,31 @@
+import numpy as np
+import numba
+from numba import dppl, njit, prange
+from numba.dppl.testing import unittest, DPPLTestCase
+from numba.tests.support import captured_stdout
+import dpctl.ocldrv as ocldrv
+
+
+def prange_example():
+    n = 10
+    a = np.ones((n, n), dtype=np.float64)
+    b = np.ones((n, n), dtype=np.float64)
+    c = np.ones((n, n), dtype=np.float64)
+    for i in prange(n):
+        a[i] = b[i] + c[i]
+
+
+@unittest.skipUnless(ocldrv.has_gpu_device, 'test only on GPU system')
+class TestParforMessage(DPPLTestCase):
+    def test_parfor_message(self):
+        numba.dppl.compiler.DEBUG = 1
+        jitted = njit(parallel={'offload':True})(prange_example)
+
+        with captured_stdout() as got:
+            jitted()
+
+        self.assertTrue('Parfor lowered on DPPL-device' in got.getvalue())
+
+
+if __name__ == '__main__':
+    unittest.main()