Force output of vars with "omp declare target" attribute in gcc/varpool.c

gcc/
	* varpool.c (varpool_node::get_create): Force output of vars with
	"omp declare target" attribute.
libgomp/
	* testsuite/libgomp.c/target-9.c: New test.

From-SVN: r218607

gcc/ChangeLog

+2014-12-10  Ilya Verbin  <ilya.verbin@intel.com>
+
+	* varpool.c (varpool_node::get_create): Force output of vars with
+	"omp declare target" attribute.
+
 2014-12-10  Marc Glisse  <marc.glisse@inria.fr>
 
 	* real.h (HONOR_NANS): Replace macro with 3 overloaded declarations.

gcc/varpool.c

@@ -175,6 +175,7 @@ varpool_node::get_create (tree decl)
       g->have_offload = true;
       if (!in_lto_p)
 	vec_safe_push (offload_vars, decl);
+      node->force_output = 1;
 #endif
     }
 

libgomp/ChangeLog

+2014-12-10  Ilya Verbin  <ilya.verbin@intel.com>
+
+	* testsuite/libgomp.c/target-9.c: New test.
+
 2014-12-09  Varvara Rainchik  <varvara.rainchik@intel.com>
 
 	* config.h.in: Regenerate.

libgomp/testsuite/libgomp.c/target-9.c

+/* { dg-do run } */
+/* { dg-options "-O1" } */
+/* { dg-additional-options "-flto" { target lto } } */
+
+#include <stdlib.h>
+
+#define N 123456
+
+#pragma omp declare target
+int X, Y;
+#pragma omp end declare target
+
+void
+foo ()
+{
+  #pragma omp target map(alloc: X)
+    X = N;
+}
+
+int
+main ()
+{
+  int res;
+
+  foo ();
+
+  #pragma omp target map(alloc: X, Y) map(from: res)
+    {
+      Y = N;
+      res = X + Y;
+    }
+
+  if (res != N + N)
+    abort ();
+
+  return 0;
+}