OpenACC host_data support.

	gcc/
	* gimple-pretty-print.c (dump_gimple_omp_target): Add host_data
	support.
	* gimple.h (gf_mask): Add GF_OMP_TARGET_KIND_OACC_HOST_DATA.
	(is_gimple_omp_oacc): Add support for above.
	* gimplify.c (omp_region_type): Add ORT_ACC_HOST_DATA.
	(omp_notice_variable): Diagnose undefined implicit uses of
	use_device variables in offloaded regions.
	(gimplify_scan_omp_clauses): Add host_data, use_device
	support. Diagnose undefined mapping of use_device variables in
	OpenACC clauses.
	(gimplify_omp_workshare): Add host_data support.
	(gimplify_expr): Likewise.
	* omp-builtins.def (BUILT_IN_GOACC_HOST_DATA): New.
	* omp-low.c (lookup_decl_in_outer_ctx)
	(maybe_lookup_decl_in_outer_ctx): Add optional argument to skip
	host_data regions.
	(scan_sharing_clauses): Support use_device.
	(check_omp_nesting_restrictions): Support host_data.
	(expand_omp_target): Support host_data.
	(lower_omp_target): Skip over outer host_data regions when looking
	up decls. Support use_device.
	(make_gimple_omp_edges): Support host_data.
	* tree-nested.c (convert_nonlocal_omp_clauses): Add use_device
	clause.

	gcc/c/
	* c-parser.c (c_parser_omp_clause_name): Add use_device support.
	(c_parser_oacc_clause_use_device): New function.
	(c_parser_oacc_all_clauses): Add use_device support.
	(OACC_HOST_DATA_CLAUSE_MASK): New macro.
	(c_parser_oacc_host_data): New function.
	(c_parser_omp_construct): Add host_data support.
	* c-tree.h (c_finish_oacc_host_data): Add prototype.
	* c-typeck.c (c_finish_oacc_host_data): New function.
	(c_finish_omp_clauses): Add use_device support.

	gcc/cp/
	* cp-tree.h (finish_oacc_host_data): Add prototype.
	* parser.c (cp_parser_omp_clause_name): Add use_device support.
	(cp_parser_oacc_all_clauses): Add use_device support.
	(OACC_HOST_DATA_CLAUSE_MASK): New macro.
	(cp_parser_oacc_host_data): New function.
	(cp_parser_omp_construct): Add host_data support.
	(cp_parser_pragma): Add host_data support.
	* semantics.c (finish_omp_clauses): Add use_device support.
	(finish_oacc_host_data): New function.

	gcc/c-family/
	* c-pragma.c (oacc_pragmas): Add PRAGMA_OACC_HOST_DATA.
	* c-pragma.h (pragma_kind): Add PRAGMA_OACC_HOST_DATA.
	(pragma_omp_clause): Add PRAGMA_OACC_CLAUSE_USE_DEVICE.

	libgomp/
	* oacc-parallel.c (GOACC_host_data): New function.
	* libgomp.map (GOACC_host_data): Add to GOACC_2.0.1.
	* testsuite/libgomp.oacc-c-c++-common/host_data-1.c: New test.
	* testsuite/libgomp.oacc-c-c++-common/host_data-2.c: New test.
	* testsuite/libgomp.oacc-c-c++-common/host_data-3.c: New test.
	* testsuite/libgomp.oacc-c-c++-common/host_data-4.c: New test.
	* testsuite/libgomp.oacc-c-c++-common/host_data-5.c: New test.
	* testsuite/libgomp.oacc-c-c++-common/host_data-6.c: New test.


Co-Authored-By: Cesar Philippidis <cesar@codesourcery.com>
Co-Authored-By: James Norris <James_Norris@mentor.com>

From-SVN: r231118

1 files changed, 41 insertions, 0 deletions

diff --git a/gcc/c/c-parser.c b/gcc/c/c-parser.c
index 0259f66..d4c512f 100644
--- a/gcc/c/c-parser.c
+++ b/gcc/c/c-parser.c
@@ -10279,6 +10279,8 @@ c_parser_omp_clause_name (c_parser *parser)
 	    result = PRAGMA_OMP_CLAUSE_UNTIED;
 	  else if (!strcmp ("use_device_ptr", p))
 	    result = PRAGMA_OMP_CLAUSE_USE_DEVICE_PTR;
+	  else if (!strcmp ("use_device", p))
+	    result = PRAGMA_OACC_CLAUSE_USE_DEVICE;
 	  break;
 	case 'v':
 	  if (!strcmp ("vector", p))
@@ -11631,6 +11633,15 @@ c_parser_oacc_clause_tile (c_parser *parser, tree list)
   return c;
 }
 
+/* OpenACC 2.0:
+   use_device ( variable-list ) */
+
+static tree
+c_parser_oacc_clause_use_device (c_parser *parser, tree list)
+{
+  return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_USE_DEVICE, list);
+}
+
 /* OpenACC:
    wait ( int-expr-list ) */
 
@@ -12940,6 +12951,10 @@ c_parser_oacc_all_clauses (c_parser *parser, omp_clause_mask mask,
 	  clauses = c_parser_oacc_data_clause (parser, c_kind, clauses);
 	  c_name = "self";
 	  break;
+	case PRAGMA_OACC_CLAUSE_USE_DEVICE:
+	  clauses = c_parser_oacc_clause_use_device (parser, clauses);
+	  c_name = "use_device";
+	  break;
 	case PRAGMA_OACC_CLAUSE_SEQ:
 	  clauses = c_parser_oacc_simple_clause (parser, OMP_CLAUSE_SEQ,
 						clauses);
@@ -13590,6 +13605,29 @@ c_parser_oacc_enter_exit_data (c_parser *parser, bool enter)
 
 
 /* OpenACC 2.0:
+   # pragma acc host_data oacc-data-clause[optseq] new-line
+     structured-block
+*/
+
+#define OACC_HOST_DATA_CLAUSE_MASK					\
+	( (OMP_CLAUSE_MASK_1 << PRAGMA_OACC_CLAUSE_USE_DEVICE) )
+
+static tree
+c_parser_oacc_host_data (location_t loc, c_parser *parser)
+{
+  tree stmt, clauses, block;
+
+  clauses = c_parser_oacc_all_clauses (parser, OACC_HOST_DATA_CLAUSE_MASK,
+				       "#pragma acc host_data");
+
+  block = c_begin_omp_parallel ();
+  add_stmt (c_parser_omp_structured_block (parser));
+  stmt = c_finish_oacc_host_data (loc, clauses, block);
+  return stmt;
+}
+
+
+/* OpenACC 2.0:
 
    # pragma acc loop oacc-loop-clause[optseq] new-line
      structured-block
@@ -16897,6 +16935,9 @@ c_parser_omp_construct (c_parser *parser)
     case PRAGMA_OACC_DATA:
       stmt = c_parser_oacc_data (loc, parser);
       break;
+    case PRAGMA_OACC_HOST_DATA:
+      stmt = c_parser_oacc_host_data (loc, parser);
+      break;
     case PRAGMA_OACC_KERNELS:
     case PRAGMA_OACC_PARALLEL:
       strcpy (p_name, "#pragma acc");