Remove incorrect warning for parallel firstprivate clause

2016-03-24  Tom de Vries  <tom@codesourcery.com>

	* omp-low.c (lower_omp_target): Set TREE_NO_WARNING for oacc
	firstprivate clause.

	* c-c++-common/goacc/uninit-firstprivate-clause.c: New test.
	* gfortran.dg/goacc/uninit-firstprivate-clause.f95: New test.

---
 gcc/omp-low.c                                      |  5 ++++-
 .../goacc/uninit-firstprivate-clause.c             | 25 ++++++++++++++++++++++
 .../goacc/uninit-firstprivate-clause.f95           | 18 ++++++++++++++++
 3 files changed, 47 insertions(+), 1 deletion(-)

diff --git a/gcc/omp-low.c b/gcc/omp-low.c
index d107961..41eb3c8 100644
--- a/gcc/omp-low.c
+++ b/gcc/omp-low.c
@@ -16068,7 +16068,10 @@ lower_omp_target (gimple_stmt_iterator *gsi_p, omp_context *ctx)
 		  {
 		    gcc_assert (is_gimple_omp_oacc (ctx->stmt));
 		    if (!is_reference (var))
-		      var = build_fold_addr_expr (var);
+		      {
+			TREE_NO_WARNING (var) = 1;
+			var = build_fold_addr_expr (var);
+		      }
 		    else
 		      talign = TYPE_ALIGN_UNIT (TREE_TYPE (TREE_TYPE (ovar)));
 		    gimplify_assign (x, var, &ilist);
diff --git a/gcc/testsuite/c-c++-common/goacc/uninit-firstprivate-clause.c b/gcc/testsuite/c-c++-common/goacc/uninit-firstprivate-clause.c
new file mode 100644
index 0000000..3d3a03e
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/goacc/uninit-firstprivate-clause.c
@@ -0,0 +1,25 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-Wuninitialized" } */
+
+void
+foo (void)
+{
+  int i;
+
+#pragma acc parallel
+  {
+    i = 1;
+  }
+}
+
+
+void
+foo2 (void)
+{
+  int i;
+
+#pragma acc parallel firstprivate (i)
+  {
+    i = 1;
+  }
+}
diff --git a/gcc/testsuite/gfortran.dg/goacc/uninit-firstprivate-clause.f95 b/gcc/testsuite/gfortran.dg/goacc/uninit-firstprivate-clause.f95
new file mode 100644
index 0000000..c18765b
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/goacc/uninit-firstprivate-clause.f95
@@ -0,0 +1,18 @@
+! { dg-do compile }
+! { dg-additional-options "-Wuninitialized" }
+
+subroutine test
+  INTEGER :: i
+
+  !$acc parallel
+  i = 1
+  !$acc end parallel
+end subroutine test
+
+subroutine test2
+  INTEGER :: i
+
+  !$acc parallel firstprivate (i)
+  i = 1
+  !$acc end parallel
+end subroutine test2