Copy shadow argument conditionally (PR hsa/70337)

	PR hsa/70337
	* plugin/plugin-hsa.c (GOMP_OFFLOAD_run): Copy shadow
	argument just in case a dispatched kernel uses that argument.

From-SVN: r234418

libgomp/ChangeLog

+2016-03-23  Martin Liska  <mliska@suse.cz>
+
+	PR hsa/70337
+	* plugin/plugin-hsa.c (GOMP_OFFLOAD_run): Copy shadow
+	argument just in case a dispatched kernel uses that argument.
+
 2016-03-16  Thomas Schwinge  <thomas@codesourcery.com>
 
 	* testsuite/libgomp.oacc-fortran/kernels-loop-2.f95: Adjust to

libgomp/plugin/plugin-hsa.c

@@ -1255,8 +1255,16 @@ GOMP_OFFLOAD_run (int n, void *fn_ptr, void *vars, void **args)
   hsa_signal_store_relaxed (s, 1);
   memcpy (shadow->kernarg_address, &vars, sizeof (vars));
 
-  memcpy (shadow->kernarg_address + sizeof (vars), &shadow,
-	  sizeof (struct hsa_kernel_runtime *));
+  /* PR hsa/70337.  */
+  size_t vars_size = sizeof (vars);
+  if (kernel->kernarg_segment_size > vars_size)
+    {
+      if (kernel->kernarg_segment_size != vars_size
+	  + sizeof (struct hsa_kernel_runtime *))
+	GOMP_PLUGIN_fatal ("Kernel segment size has an unexpected value");
+      memcpy (packet->kernarg_address + vars_size, &shadow,
+	      sizeof (struct hsa_kernel_runtime *));
+    }
 
   HSA_DEBUG ("Copying kernel runtime pointer to kernarg_address\n");