c-parser.c (c_parser_oacc_declare): Don't scan for GOMP_MAP_POINTER.

	gcc/c/
	* c-parser.c (c_parser_oacc_declare): Don't scan for
	GOMP_MAP_POINTER.
	* c-typeck.c (handle_omp_array_sections): Mark data clauses with
	GOMP_MAP_FORCE_{PRESENT,TO,FROM,TOFROM} as potentially having
	zero-length subarrays.

	gcc/cp/
	* parser.c (cp_parser_oacc_declare): Don't scan for
	GOMP_MAP_POINTER.
	* semantics.c (handle_omp_array_sections): Mark data clauses with
	GOMP_MAP_FORCE_{PRESENT,TO,FROM,TOFROM} as potentially having
	zero-length subarrays.

	gcc/
	* omp-low.c (lower_omp_target): Mark data clauses with
	GOMP_MAP_FORCE_{PRESENT,TO,FROM,TOFROM} as potentially having
	zero-length subarrays.

	libgomp/
	* testsuite/libgomp.oacc-c-c++-common/zero_length_subarrays.c: New
	test.

From-SVN: r238376

2 files changed, 50 insertions, 0 deletions

diff --git a/libgomp/ChangeLog b/libgomp/ChangeLog
index 35e29c06776..e4555eacd2d 100644
--- a/libgomp/ChangeLog
+++ b/libgomp/ChangeLog
@@ -1,3 +1,8 @@
+2016-07-15  Cesar Philippidis  <cesar@codesourcery.com>
+
+	* testsuite/libgomp.oacc-c-c++-common/zero_length_subarrays.c: New
+	test.
+
 2016-07-03  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR middle-end/71734
diff --git a/libgomp/testsuite/libgomp.oacc-c-c++-common/zero_length_subarrays.c b/libgomp/testsuite/libgomp.oacc-c-c++-common/zero_length_subarrays.c
new file mode 100644
index 00000000000..8954551205b
--- /dev/null
+++ b/libgomp/testsuite/libgomp.oacc-c-c++-common/zero_length_subarrays.c
@@ -0,0 +1,45 @@
+/* Exercise zero-length sub-arrays.  */
+
+const int n = 10;
+
+void
+subzero_present (int *a, int n)
+{
+#pragma acc data present (a[0:n])
+  ;
+#pragma acc data pcopy (a[0:n])
+  ;
+#pragma acc data pcopyin (a[0:n])
+  ;
+#pragma acc data pcopyout (a[0:n])
+  ;
+
+}
+
+void
+subzero (int *a, int n)
+{
+#pragma acc data create (a[0:n])
+  ;
+#pragma acc data copy (a[0:n])
+  ;
+#pragma acc data copyin (a[0:n])
+  ;
+#pragma acc data copyout (a[0:n])
+  ;
+}
+
+int
+main ()
+{
+  int a[n];
+
+#pragma acc data copy (a[0:n])
+  {
+    subzero_present (a, 0);
+  }
+
+  subzero (a, 0);
+
+  return 0;
+}