Add 'libgomp.oacc-c-c++-common/host_data-6.c'

	libgomp/
	* testsuite/libgomp.oacc-c-c++-common/host_data-6.c: New file.

From-SVN: r279119

libgomp/ChangeLog

 2019-12-09  Thomas Schwinge  <thomas@codesourcery.com>
 
+	* testsuite/libgomp.oacc-c-c++-common/host_data-6.c: New file.
+
 	* target.c (gomp_exit_data): Use 'gomp_remove_var'.
 
 2019-12-09  Tobias Burnus  <tobias@codesourcery.com>

libgomp/testsuite/libgomp.oacc-c-c++-common/host_data-6.c

+/* Call 'acc_memcpy_from_device' inside '#pragma acc host_data'.  */
+
+/* { dg-skip-if "" { *-*-* } { "*" } { "-DACC_MEM_SHARED=0" } } */
+
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
+#include <openacc.h>
+
+int
+main ()
+{
+  const int SIZE = 318;
+  const int c0 = 22;
+  const int c1 = 112;
+
+  char *h = (char *) malloc (SIZE);
+
+  memset (h, c0, SIZE);
+
+#pragma acc data create (h[0:SIZE - 44])
+  {
+#pragma acc update device (h[0:SIZE - 44])
+
+    memset (h, c1, 67);
+
+    void *d = h;
+#pragma acc host_data use_device (d)
+    {
+      acc_memcpy_from_device (h, d, 12);
+    }
+  }
+
+  for (int i = 0; i < SIZE; ++i)
+    {
+      if (i < 12)
+	assert (h[i] == c0);
+      else if (i < 67)
+	assert (h[i] == c1);
+      else
+	assert (h[i] == c0);
+    }
+
+  free (h);
+
+  return 0;
+}