libgomp nvptx plugin: Debugging output when disabling nvptx offloading

	libgomp/
	* plugin/plugin-nvptx.c (nvptx_get_num_devices): Debugging output
	when disabling nvptx offloading.

From-SVN: r248400

diff --git a/libgomp/ChangeLog b/libgomp/ChangeLog
index 32f8bf10b2b70c870bba1d9d271196136577ba7b..14e95ef9ba92c85cafd7fe89bde6429d69317ead 100644 (file)
--- a/libgomp/ChangeLog
+++ b/libgomp/ChangeLog
@@ -1,3 +1,8 @@
+2017-05-24  Thomas Schwinge  <thomas@codesourcery.com>
+
+       * plugin/plugin-nvptx.c (nvptx_get_num_devices): Debugging output
+       when disabling nvptx offloading.
+
 2017-05-23  Thomas Schwinge  <thomas@codesourcery.com>
 
        * testsuite/libgomp.oacc-c-c++-common/kernels-loop-2.c: Update.

diff --git a/libgomp/plugin/plugin-nvptx.c b/libgomp/plugin/plugin-nvptx.c
index 3ef48dd5d82e3183adddc6d46b6fe59ff4362c75..0e1b3e2d4f3fc97dbe1861304f173c0ab251c7bc 100644 (file)
--- a/libgomp/plugin/plugin-nvptx.c
+++ b/libgomp/plugin/plugin-nvptx.c
@@ -838,7 +838,11 @@ nvptx_get_num_devices (void)
   /* PR libgomp/65099: Currently, we only support offloading in 64-bit
      configurations.  */
   if (sizeof (void *) != 8)
-    return 0;
+    {
+      GOMP_PLUGIN_debug (0, "Disabling nvptx offloading;"
+                        " only 64-bit configurations are supported\n");
+      return 0;
+    }
 
   /* This function will be called before the plugin has been initialized in
      order to enumerate available devices, but CUDA API routines can't be used
@@ -852,7 +856,11 @@ nvptx_get_num_devices (void)
       /* This is not an error: e.g. we may have CUDA libraries installed but
          no devices available.  */
       if (r != CUDA_SUCCESS)
-        return 0;
+       {
+         GOMP_PLUGIN_debug (0, "Disabling nvptx offloading; cuInit: %s\n",
+                            cuda_error (r));
+         return 0;
+       }
     }
 
   CUDA_CALL_ERET (-1, cuDeviceGetCount, &n);