Remove incorrect warning for parallel implicit firstprivate clause

2016-04-08  Tom de Vries  <tom@codesourcery.com>

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

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

From-SVN: r234826

gcc/ChangeLog

@@ -1,3 +1,8 @@
+2016-04-08  Tom de Vries  <tom@codesourcery.com>
+
+	* omp-low.c (lower_omp_target): Set TREE_NO_WARNING for oacc
+	implicit firstprivate clause.
+
 2016-04-08  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
 
 	PR target/70566

gcc/omp-low.c

@@ -16077,7 +16077,12 @@ 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);
+		      {
+			if (is_gimple_reg (var)
+			    && OMP_CLAUSE_FIRSTPRIVATE_IMPLICIT (c))
+			  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);

gcc/testsuite/ChangeLog

@@ -1,3 +1,8 @@
+2016-04-08  Tom de Vries  <tom@codesourcery.com>
+
+	* c-c++-common/goacc/uninit-firstprivate-clause.c: New test.
+	* gfortran.dg/goacc/uninit-firstprivate-clause.f95: New test.
+
 2016-04-08  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
 
 	PR target/70566

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) /* { dg-warning "is used uninitialized in this function" } */
+  {
+    i = 1;
+  }
+}

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
+
+  !$acc parallel firstprivate (i) ! { dg-warning "is used uninitialized in this function" }
+  i = 1
+  !$acc end parallel
+end subroutine test2