[OpenACC] Support C++ "this" in OpenACC directives

2018-10-29  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.

Co-Authored-By: Julian Brown <julian@codesourcery.com>

From-SVN: r265591

gcc/cp/ChangeLog

+2018-10-29  Joseph Myers  <joseph@codesourcery.com>
+	    Julian Brown  <julian@codesourcery.com>
+
+        PR c++/66053
+        * semantics.c (handle_omp_array_sections_1): Allow array
+        sections with "this" pointer for OpenACC.
+
 2018-10-25  Jason Merrill  <jason@redhat.com>
 
 	* parser.c (cp_parser_sizeof_operand): Remove redundant use of

gcc/cp/semantics.c

@@ -4600,7 +4600,8 @@ 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)
 	{

libgomp/ChangeLog

+2018-10-29  Joseph Myers  <joseph@codesourcery.com>
+	    Julian Brown  <julian@codesourcery.com>
+
+	* testsuite/libgomp.oacc-c++/this.C: New.
+
 2018-09-18  Cesar Philippidis  <cesar@codesourcery.com>
 
 	* plugin/plugin-nvptx.c (struct cuda_map): New.

libgomp/testsuite/libgomp.oacc-c++/this.C

+#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;
+}