commit 355411e5415f65e09a06f42d400761fff065f7c7
Author: Julian Brown <julian@codesourcery.com>
Date:   Fri Aug 31 17:30:20 2018 -0700

    Allow this[:] array slices for OpenACC
    
    2018-09-03  Joseph Myers  <joseph@codesourcery.com>
    	    Julian Brown  <julian@codesourcery.com>
    
    	* semantics.c (handle_omp_array_sections_1): Allow array sections with
    	"this" pointer for OpenACC.

diff --git a/gcc/cp/semantics.c b/gcc/cp/semantics.c
index 676de01..98511ed 100644
--- a/gcc/cp/semantics.c
+++ b/gcc/cp/semantics.c
@@ -4598,7 +4598,8 @@ handle_omp_array_sections_1 (tree c, tree t, vec<tree> &types,
 		      omp_clause_code_name[OMP_CLAUSE_CODE (c)]);
 	  return error_mark_node;
 	}
-      else if (TREE_CODE (t) == PARM_DECL
+      else if (ort == C_ORT_OMP
+	       && TREE_CODE (t) == PARM_DECL
 	       && DECL_ARTIFICIAL (t)
 	       && DECL_NAME (t) == this_identifier)
 	{
diff --git a/libgomp/testsuite/libgomp.oacc-c++/this.C b/libgomp/testsuite/libgomp.oacc-c++/this.C
new file mode 100644
index 0000000..510c690
--- /dev/null
+++ b/libgomp/testsuite/libgomp.oacc-c++/this.C
@@ -0,0 +1,43 @@
+#include <cstdlib>
+#include <iostream>
+using namespace std;
+
+class test {
+  public:
+  int a;
+
+  test ()
+  {
+    a = -1;
+#pragma acc enter data copyin (this[0:1])
+  }
+
+  ~test ()
+  {
+#pragma acc exit data delete (this[0:1])
+  }
+
+  void set (int i)
+  {
+    a = i;
+#pragma acc update device (this[0:1])
+  }
+
+  int get ()
+  {
+#pragma acc update host (this[0:1])
+    return a;
+  }
+};
+
+int
+main ()
+{
+  test t;
+
+  t.set (4);
+  if (t.get () != 4)
+    abort ();
+
+  return 0;
+}