omp-low.c (lower_omp_target): Set DECL_VALUE_EXPR of new_var even for the non-array case.

	* omp-low.c (lower_omp_target) <case USE_DEVICE_PTR>: Set
	DECL_VALUE_EXPR of new_var even for the non-array case.  Look
	through DECL_VALUE_EXPR for expansion.

	* c-c++-common/goacc/use_device-1.c: New test.

From-SVN: r232804

gcc/ChangeLog

+2016-01-25  Jakub Jelinek  <jakub@redhat.com>
+
+	* omp-low.c (lower_omp_target) <case USE_DEVICE_PTR>: Set
+	DECL_VALUE_EXPR of new_var even for the non-array case.  Look
+	through DECL_VALUE_EXPR for expansion.
+
 2016-01-25  Bernd Edlinger  <bernd.edlinger@hotmail.de>
 
 	* config/mips/mips.c (mips_compute_frame_info): Skip re-computing

gcc/omp-low.c

@@ -15878,6 +15878,14 @@ lower_omp_target (gimple_stmt_iterator *gsi_p, omp_context *ctx)
 	    SET_DECL_VALUE_EXPR (new_var, x);
 	    DECL_HAS_VALUE_EXPR_P (new_var) = 1;
 	  }
+	else
+	  {
+	    tree new_var = lookup_decl (var, ctx);
+	    x = create_tmp_var_raw (TREE_TYPE (new_var), get_name (new_var));
+	    gimple_add_tmp_var (x);
+	    SET_DECL_VALUE_EXPR (new_var, x);
+	    DECL_HAS_VALUE_EXPR_P (new_var) = 1;
+	  }
 	break;
       }
 
@@ -16493,6 +16501,7 @@ lower_omp_target (gimple_stmt_iterator *gsi_p, omp_context *ctx)
 			x = build_fold_addr_expr (v);
 		      }
 		  }
+		new_var = DECL_VALUE_EXPR (new_var);
 		x = fold_convert (TREE_TYPE (new_var), x);
 		gimplify_expr (&x, &new_body, NULL, is_gimple_val, fb_rvalue);
 		gimple_seq_add_stmt (&new_body,

gcc/testsuite/ChangeLog

+2016-01-25  Jakub Jelinek  <jakub@redhat.com>
+
+	* c-c++-common/goacc/use_device-1.c: New test.
+
 2016-01-25  Jeff Law  <law@redhat.com>
 
 	PR tree-optimization/69196

gcc/testsuite/c-c++-common/goacc/use_device-1.c

+/* { dg-do compile } */
+
+void bar (float *, float *);
+
+void
+foo (float *x, float *y)
+{
+  int n = 1 << 10;
+#pragma acc data create(x[0:n]) copyout(y[0:n])
+  {
+#pragma acc host_data use_device(x,y)
+    bar (x, y);
+  }
+}