Add 'libgomp.oacc-c-c++-common/map-data-1.c'

	libgomp/
	* testsuite/libgomp.oacc-c-c++-common/map-data-1.c: New file.

From-SVN: r279121

libgomp/ChangeLog

 2019-12-09  Thomas Schwinge  <thomas@codesourcery.com>
 
+	* testsuite/libgomp.oacc-c-c++-common/map-data-1.c: New file.
+
 	PR libgomp/92854
 	* testsuite/libgomp.oacc-c-c++-common/pr92854-1.c: New file.
 

libgomp/testsuite/libgomp.oacc-c-c++-common/map-data-1.c

+/* Verify that 'acc_map_data' does not copy data to, and 'acc_unmap_data' does
+   not copy data from the device.  */
+
+/* { dg-skip-if "" { *-*-* } { "*" } { "-DACC_MEM_SHARED=0" } } */
+
+#include <stdlib.h>
+#include <string.h>
+#include <openacc.h>
+
+int
+main ()
+{
+  const int c0 = 9;
+  const int c1 = 40;
+  const int c2 = 47;
+
+  const size_t N = 256;
+
+  unsigned char *h = (unsigned char *) malloc (N);
+
+  void *d = acc_malloc (N);
+
+  memset (h, c0, N); // H <- c0
+  acc_memcpy_to_device (d, h, N); // D <- H = c0
+
+  memset (h, c1, N); // H <- c1
+  acc_map_data (h, d, N);
+  for (size_t i = 0; i < N; ++i)
+    if (h[i] != c1)
+      abort ();
+
+  acc_memcpy_from_device (h, d, N); // H <- D = c0
+  for (size_t i = 0; i < N; ++i)
+    if (h[i] != c0)
+      abort ();
+
+  memset (h, c2, N); // H <- c2
+  acc_unmap_data (h);
+  for (size_t i = 0; i < N; ++i)
+    if (h[i] != c2)
+      abort ();
+
+  acc_memcpy_from_device (h, d, N); // H <- D = c0
+  for (size_t i = 0; i < N; ++i)
+    if (h[i] != c0)
+      abort ();
+
+  acc_free (d);
+
+  free (h);
+
+  return 0;
+}