Add entrypoint attribute for the use of nvptx.

	* omp-low.c (create_omp_child_function): Tag entrypoint
	functions with a special attribute.

From-SVN: r220950

gcc/ChangeLog

+2015-02-24  Bernd Schmidt  <bernds@codesourcery.com>
+
+	* omp-low.c (create_omp_child_function): Tag entrypoint
+	functions with a special attribute.
+
 2015-02-24  Michael Haubenwallner <michael.haubenwallner@ssi-schaefer.com>
 
 	PR target/65058

gcc/omp-low.c

@@ -2176,6 +2176,13 @@ create_omp_child_function (omp_context *ctx, bool task_copy)
 	  }
     }
 
+  if (cgraph_node::get_create (decl)->offloadable
+      && !lookup_attribute ("omp declare target",
+                           DECL_ATTRIBUTES (current_function_decl)))
+    DECL_ATTRIBUTES (decl)
+      = tree_cons (get_identifier ("omp target entrypoint"),
+                   NULL_TREE, DECL_ATTRIBUTES (decl));
+
   t = build_decl (DECL_SOURCE_LOCATION (decl),
 		  RESULT_DECL, NULL_TREE, void_type_node);
   DECL_ARTIFICIAL (t) = 1;