tree-core.h (enum omp_clause_code): Add OMP_CLAUSE_ORDER.

	* tree-core.h (enum omp_clause_code): Add OMP_CLAUSE_ORDER.
	* tree.c (omp_clause_num_ops, omp_clause_code_name): Add
	order clause entries.
	(walk_tree_1): Handle OMP_CLAUSE_ORDER.
	* tree-pretty-print.c (dump_omp_clause): Likewise.
	* gimplify.c (gimplify_scan_omp_clauses, gimplify_adjust_omp_clauses):
	Likewise.
	* omp-low.c (scan_sharing_clauses): Likewise.
	* tree-nested.c (convert_nonlocal_omp_clauses,
	convert_local_omp_clauses): Likewise.
c-family/
	* c-pragma.h (enum pragma_omp_clause): Add PRAGMA_OMP_CLAUSE_ORDER.
	* c-omp.c (c_omp_split_clauses): Handle splitting of OMP_CLAUSE_ORDER.
c/
	* c-parser.c (c_parser_omp_clause_name): Handle order clause.
	(c_parser_omp_clause_order): New function.
	(c_parser_omp_all_clauses): Handle PRAGMA_OMP_CLAUSE_ORDER.
	(OMP_SIMD_CLAUSE_MASK, OMP_FOR_CLAUSE_MASK): Add
	PRAGMA_OMP_CLAUSE_ORDER.
	* c-typeck.c (c_finish_omp_clauses): Handle OMP_CLAUSE_ORDER.
cp/
	* parser.c (cp_parser_omp_clause_name): Handle order clause.
	(cp_parser_omp_clause_order): New function.
	(cp_parser_omp_all_clauses): Handle PRAGMA_OMP_CLAUSE_ORDER.
	(OMP_SIMD_CLAUSE_MASK, OMP_FOR_CLAUSE_MASK): Add
	PRAGMA_OMP_CLAUSE_ORDER.
	* semantics.c (finish_omp_clauses): Handle OMP_CLAUSE_ORDER.
	* pt.c (tsubst_omp_clauses): Likewise.
testsuite/
	* c-c++-common/gomp/order-1.c: New test.
	* c-c++-common/gomp/order-2.c: New test.

From-SVN: r273431

20 files changed, 342 insertions, 7 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d4eaa49..34fb0da 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,16 @@
+2019-07-12  Jakub Jelinek  <jakub@redhat.com>
+
+	* tree-core.h (enum omp_clause_code): Add OMP_CLAUSE_ORDER.
+	* tree.c (omp_clause_num_ops, omp_clause_code_name): Add
+	order clause entries.
+	(walk_tree_1): Handle OMP_CLAUSE_ORDER.
+	* tree-pretty-print.c (dump_omp_clause): Likewise.
+	* gimplify.c (gimplify_scan_omp_clauses, gimplify_adjust_omp_clauses):
+	Likewise.
+	* omp-low.c (scan_sharing_clauses): Likewise.
+	* tree-nested.c (convert_nonlocal_omp_clauses,
+	convert_local_omp_clauses): Likewise.
+
 2019-07-12  Kewen Lin  <linkw@gcc.gnu.org>
 
 	* gcc/cfgrtl.c (print_rtl_with_bb): Emit a hint if the
diff --git a/gcc/c-family/ChangeLog b/gcc/c-family/ChangeLog
index bbad47f..b84e1f5 100644
--- a/gcc/c-family/ChangeLog
+++ b/gcc/c-family/ChangeLog
@@ -1,7 +1,12 @@
+2019-07-12  Jakub Jelinek  <jakub@redhat.com>
+
+	* c-pragma.h (enum pragma_omp_clause): Add PRAGMA_OMP_CLAUSE_ORDER.
+	* c-omp.c (c_omp_split_clauses): Handle splitting of OMP_CLAUSE_ORDER.
+
 2019-07-09  Martin Sebor  <msebor@redhat.com>
 
 	PR c++/61339
-	* c-opts.c (handle_deferred_opts): : Change class-key of PODs to struct
+	* c-opts.c (handle_deferred_opts): Change class-key of PODs to struct
 	and others to class.
 	* c-pretty-print.h: Same.
 
diff --git a/gcc/c-family/c-omp.c b/gcc/c-family/c-omp.c
index 583305e..fc08e93 100644
--- a/gcc/c-family/c-omp.c
+++ b/gcc/c-family/c-omp.c
@@ -1632,6 +1632,24 @@ c_omp_split_clauses (location_t loc, enum tree_code code,
 	    }
 	  s = C_OMP_CLAUSE_SPLIT_PARALLEL;
 	  break;
+	/* order clauses are allowed on for and simd.  */
+	case OMP_CLAUSE_ORDER:
+	  if ((mask & (OMP_CLAUSE_MASK_1 << PRAGMA_OMP_CLAUSE_SCHEDULE)) != 0)
+	    {
+	      if (code == OMP_SIMD)
+		{
+		  c = build_omp_clause (OMP_CLAUSE_LOCATION (clauses),
+					OMP_CLAUSE_ORDER);
+		  OMP_CLAUSE_CHAIN (c) = cclauses[C_OMP_CLAUSE_SPLIT_FOR];
+		  cclauses[C_OMP_CLAUSE_SPLIT_FOR] = c;
+		  s = C_OMP_CLAUSE_SPLIT_SIMD;
+		}
+	      else
+		s = C_OMP_CLAUSE_SPLIT_FOR;
+	    }
+	  else
+	    s = C_OMP_CLAUSE_SPLIT_SIMD;
+	  break;
 	/* Reduction is allowed on simd, for, parallel, sections, taskloop
 	   and teams.  Duplicate it on all of them, but omit on for or
 	   sections if parallel is present (unless inscan, in that case
diff --git a/gcc/c-family/c-pragma.h b/gcc/c-family/c-pragma.h
index ed65036..4239ada 100644
--- a/gcc/c-family/c-pragma.h
+++ b/gcc/c-family/c-pragma.h
@@ -114,6 +114,7 @@ enum pragma_omp_clause {
   PRAGMA_OMP_CLAUSE_NUM_TASKS,
   PRAGMA_OMP_CLAUSE_NUM_TEAMS,
   PRAGMA_OMP_CLAUSE_NUM_THREADS,
+  PRAGMA_OMP_CLAUSE_ORDER,
   PRAGMA_OMP_CLAUSE_ORDERED,
   PRAGMA_OMP_CLAUSE_PARALLEL,
   PRAGMA_OMP_CLAUSE_PRIORITY,
diff --git a/gcc/c/ChangeLog b/gcc/c/ChangeLog
index bb0573e..c58680c 100644
--- a/gcc/c/ChangeLog
+++ b/gcc/c/ChangeLog
@@ -1,3 +1,12 @@
+2019-07-12  Jakub Jelinek  <jakub@redhat.com>
+
+	* c-parser.c (c_parser_omp_clause_name): Handle order clause.
+	(c_parser_omp_clause_order): New function.
+	(c_parser_omp_all_clauses): Handle PRAGMA_OMP_CLAUSE_ORDER.
+	(OMP_SIMD_CLAUSE_MASK, OMP_FOR_CLAUSE_MASK): Add
+	PRAGMA_OMP_CLAUSE_ORDER.
+	* c-typeck.c (c_finish_omp_clauses): Handle OMP_CLAUSE_ORDER.
+
 2019-07-10  Richard Biener  <rguenther@suse.de>
 
 	* gimple-parser.c (c_parser_gimple_postfix_expression): Support
diff --git a/gcc/c/c-parser.c b/gcc/c/c-parser.c
index 3fa7e68..1f83c24 100644
--- a/gcc/c/c-parser.c
+++ b/gcc/c/c-parser.c
@@ -11789,6 +11789,8 @@ c_parser_omp_clause_name (c_parser *parser)
 	case 'o':
 	  if (!strcmp ("ordered", p))
 	    result = PRAGMA_OMP_CLAUSE_ORDERED;
+	  else if (!strcmp ("order", p))
+	    result = PRAGMA_OMP_CLAUSE_ORDER;
 	  break;
 	case 'p':
 	  if (!strcmp ("parallel", p))
@@ -13467,6 +13469,44 @@ c_parser_oacc_clause_wait (c_parser *parser, tree list)
   return list;
 }
 
+
+/* OpenMP 5.0:
+   order ( concurrent ) */
+
+static tree
+c_parser_omp_clause_order (c_parser *parser, tree list)
+{
+  location_t loc = c_parser_peek_token (parser)->location;
+  tree c;
+  const char *p;
+
+  matching_parens parens;
+  if (!parens.require_open (parser))
+    return list;
+  if (!c_parser_next_token_is (parser, CPP_NAME))
+    {
+      c_parser_error (parser, "expected %<concurrent%>");
+      goto out_err;
+    }
+  p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value);
+  if (strcmp (p, "concurrent") != 0)
+    {
+      c_parser_error (parser, "expected %<concurrent%>");
+      goto out_err;
+    }
+  c_parser_consume_token (parser);
+  parens.skip_until_found_close (parser);
+  /* check_no_duplicate_clause (list, OMP_CLAUSE_ORDER, "order"); */
+  c = build_omp_clause (loc, OMP_CLAUSE_ORDER);
+  OMP_CLAUSE_CHAIN (c) = list;
+  return c;
+
+ out_err:
+  parens.skip_until_found_close (parser);
+  return list;
+}
+
+
 /* OpenMP 2.5:
    ordered
 
@@ -15092,6 +15132,10 @@ c_parser_omp_all_clauses (c_parser *parser, omp_clause_mask mask,
 	  clauses = c_parser_omp_clause_num_threads (parser, clauses);
 	  c_name = "num_threads";
 	  break;
+	case PRAGMA_OMP_CLAUSE_ORDER:
+	  clauses = c_parser_omp_clause_order (parser, clauses);
+	  c_name = "order";
+	  break;
 	case PRAGMA_OMP_CLAUSE_ORDERED:
 	  clauses = c_parser_omp_clause_ordered (parser, clauses);
 	  c_name = "ordered";
@@ -17221,7 +17265,8 @@ omp_split_clauses (location_t loc, enum tree_code code,
 	| (OMP_CLAUSE_MASK_1 << PRAGMA_OMP_CLAUSE_REDUCTION)	\
 	| (OMP_CLAUSE_MASK_1 << PRAGMA_OMP_CLAUSE_COLLAPSE)	\
 	| (OMP_CLAUSE_MASK_1 << PRAGMA_OMP_CLAUSE_IF)		\
-	| (OMP_CLAUSE_MASK_1 << PRAGMA_OMP_CLAUSE_NONTEMPORAL))
+	| (OMP_CLAUSE_MASK_1 << PRAGMA_OMP_CLAUSE_NONTEMPORAL)	\
+	| (OMP_CLAUSE_MASK_1 << PRAGMA_OMP_CLAUSE_ORDER))
 
 static tree
 c_parser_omp_simd (location_t loc, c_parser *parser,
@@ -17277,7 +17322,8 @@ c_parser_omp_simd (location_t loc, c_parser *parser,
 	| (OMP_CLAUSE_MASK_1 << PRAGMA_OMP_CLAUSE_ORDERED)	\
 	| (OMP_CLAUSE_MASK_1 << PRAGMA_OMP_CLAUSE_SCHEDULE)	\
 	| (OMP_CLAUSE_MASK_1 << PRAGMA_OMP_CLAUSE_COLLAPSE)	\
-	| (OMP_CLAUSE_MASK_1 << PRAGMA_OMP_CLAUSE_NOWAIT))
+	| (OMP_CLAUSE_MASK_1 << PRAGMA_OMP_CLAUSE_NOWAIT)	\
+	| (OMP_CLAUSE_MASK_1 << PRAGMA_OMP_CLAUSE_ORDER))
 
 static tree
 c_parser_omp_for (location_t loc, c_parser *parser,
diff --git a/gcc/c/c-typeck.c b/gcc/c/c-typeck.c
index 6419ca9..e4ce03d 100644
--- a/gcc/c/c-typeck.c
+++ b/gcc/c/c-typeck.c
@@ -13667,6 +13667,7 @@ c_finish_omp_clauses (tree clauses, enum c_omp_region_type ort)
   tree last_iterators = NULL_TREE;
   bool last_iterators_remove = false;
   tree *nogroup_seen = NULL;
+  tree *order_clause = NULL;
   /* 1 if normal/task reduction has been seen, -1 if inscan reduction
      has been seen, -2 if mixed inscan/normal reduction diagnosed.  */
   int reduction_seen = 0;
@@ -14631,6 +14632,25 @@ c_finish_omp_clauses (tree clauses, enum c_omp_region_type ort)
 	  pc = &OMP_CLAUSE_CHAIN (c);
 	  continue;
 
+	case OMP_CLAUSE_ORDER:
+	  if (ordered_clause)
+	    {
+	      error_at (OMP_CLAUSE_LOCATION (c),
+			"%<order%> clause must not be used together "
+			"with %<ordered%>");
+	      remove = true;
+	      break;
+	    }
+	  else if (order_clause)
+	    {
+	      /* Silently remove duplicates.  */
+	      remove = true;
+	      break;
+	    }
+	  order_clause = pc;
+	  pc = &OMP_CLAUSE_CHAIN (c);
+	  continue;
+
 	case OMP_CLAUSE_IF:
 	case OMP_CLAUSE_NUM_THREADS:
 	case OMP_CLAUSE_NUM_TEAMS:
@@ -14683,6 +14703,14 @@ c_finish_omp_clauses (tree clauses, enum c_omp_region_type ort)
 
 	case OMP_CLAUSE_ORDERED:
 	  ordered_clause = c;
+	  if (order_clause)
+	    {
+	      error_at (OMP_CLAUSE_LOCATION (*order_clause),
+			"%<order%> clause must not be used together "
+			"with %<ordered%>");
+	      *order_clause = OMP_CLAUSE_CHAIN (*order_clause);
+	      order_clause = NULL;
+	    }
 	  pc = &OMP_CLAUSE_CHAIN (c);
 	  continue;
 
diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index bc788c1..a18959d 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,13 @@
+2019-07-12  Jakub Jelinek  <jakub@redhat.com>
+
+	* parser.c (cp_parser_omp_clause_name): Handle order clause.
+	(cp_parser_omp_clause_order): New function.
+	(cp_parser_omp_all_clauses): Handle PRAGMA_OMP_CLAUSE_ORDER.
+	(OMP_SIMD_CLAUSE_MASK, OMP_FOR_CLAUSE_MASK): Add
+	PRAGMA_OMP_CLAUSE_ORDER.
+	* semantics.c (finish_omp_clauses): Handle OMP_CLAUSE_ORDER.
+	* pt.c (tsubst_omp_clauses): Likewise.
+
 2019-07-10  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	* decl.c (get_type_quals,
diff --git a/gcc/cp/parser.c b/gcc/cp/parser.c
index 1281410..c46740a 100644
--- a/gcc/cp/parser.c
+++ b/gcc/cp/parser.c
@@ -32528,6 +32528,8 @@ cp_parser_omp_clause_name (cp_parser *parser)
 	case 'o':
 	  if (!strcmp ("ordered", p))
 	    result = PRAGMA_OMP_CLAUSE_ORDERED;
+	  else if (!strcmp ("order", p))
+	    result = PRAGMA_OMP_CLAUSE_ORDER;
 	  break;
 	case 'p':
 	  if (!strcmp ("parallel", p))
@@ -33919,6 +33921,50 @@ cp_parser_omp_clause_defaultmap (cp_parser *parser, tree list,
   return list;
 }
 
+/* OpenMP 5.0:
+   order ( concurrent ) */
+
+static tree
+cp_parser_omp_clause_order (cp_parser *parser, tree list, location_t location)
+{
+  tree c, id;
+  const char *p;
+
+  matching_parens parens;
+  if (!parens.require_open (parser))
+    return list;
+
+  if (!cp_lexer_next_token_is (parser->lexer, CPP_NAME))
+    {
+      cp_parser_error (parser, "expected %<concurrent%>");
+      goto out_err;
+    }
+  else
+    {
+      id = cp_lexer_peek_token (parser->lexer)->u.value;
+      p = IDENTIFIER_POINTER (id);
+    }
+  if (strcmp (p, "concurrent") != 0)
+    {
+      cp_parser_error (parser, "expected %<concurrent%>");
+      goto out_err;
+    }
+  cp_lexer_consume_token (parser->lexer);
+  if (!parens.require_close (parser))
+    goto out_err;
+
+  /* check_no_duplicate_clause (list, OMP_CLAUSE_ORDER, "order", location); */
+  c = build_omp_clause (location, OMP_CLAUSE_ORDER);
+  OMP_CLAUSE_CHAIN (c) = list;
+  return c;
+
+ out_err:
+  cp_parser_skip_to_closing_parenthesis (parser, /*recovering=*/true,
+					 /*or_comma=*/false,
+					 /*consume_paren=*/true);
+  return list;
+}
+
 /* OpenMP 2.5:
    ordered
 
@@ -35510,7 +35556,8 @@ cp_parser_omp_all_clauses (cp_parser *parser, omp_clause_mask mask,
 	  c_name = "mergeable";
 	  break;
 	case PRAGMA_OMP_CLAUSE_NOWAIT:
-	  clauses = cp_parser_omp_clause_nowait (parser, clauses, token->location);
+	  clauses = cp_parser_omp_clause_nowait (parser, clauses,
+						 token->location);
 	  c_name = "nowait";
 	  break;
 	case PRAGMA_OMP_CLAUSE_NUM_TASKS:
@@ -35523,6 +35570,11 @@ cp_parser_omp_all_clauses (cp_parser *parser, omp_clause_mask mask,
 						      token->location);
 	  c_name = "num_threads";
 	  break;
+	case PRAGMA_OMP_CLAUSE_ORDER:
+	  clauses = cp_parser_omp_clause_order (parser, clauses,
+						token->location);
+	  c_name = "order";
+	  break;
 	case PRAGMA_OMP_CLAUSE_ORDERED:
 	  clauses = cp_parser_omp_clause_ordered (parser, clauses,
 						  token->location);
@@ -37560,7 +37612,8 @@ cp_omp_split_clauses (location_t loc, enum tree_code code,
 	| (OMP_CLAUSE_MASK_1 << PRAGMA_OMP_CLAUSE_REDUCTION)	\
 	| (OMP_CLAUSE_MASK_1 << PRAGMA_OMP_CLAUSE_COLLAPSE)	\
 	| (OMP_CLAUSE_MASK_1 << PRAGMA_OMP_CLAUSE_IF)		\
-	| (OMP_CLAUSE_MASK_1 << PRAGMA_OMP_CLAUSE_NONTEMPORAL))
+	| (OMP_CLAUSE_MASK_1 << PRAGMA_OMP_CLAUSE_NONTEMPORAL)	\
+	| (OMP_CLAUSE_MASK_1 << PRAGMA_OMP_CLAUSE_ORDER))
 
 static tree
 cp_parser_omp_simd (cp_parser *parser, cp_token *pragma_tok,
@@ -37620,7 +37673,8 @@ cp_parser_omp_simd (cp_parser *parser, cp_token *pragma_tok,
 	| (OMP_CLAUSE_MASK_1 << PRAGMA_OMP_CLAUSE_ORDERED)	\
 	| (OMP_CLAUSE_MASK_1 << PRAGMA_OMP_CLAUSE_SCHEDULE)	\
 	| (OMP_CLAUSE_MASK_1 << PRAGMA_OMP_CLAUSE_NOWAIT)	\
-	| (OMP_CLAUSE_MASK_1 << PRAGMA_OMP_CLAUSE_COLLAPSE))
+	| (OMP_CLAUSE_MASK_1 << PRAGMA_OMP_CLAUSE_COLLAPSE)	\
+	| (OMP_CLAUSE_MASK_1 << PRAGMA_OMP_CLAUSE_ORDER))
 
 static tree
 cp_parser_omp_for (cp_parser *parser, cp_token *pragma_tok,
diff --git a/gcc/cp/pt.c b/gcc/cp/pt.c
index c0a0487..e23c0aa 100644
--- a/gcc/cp/pt.c
+++ b/gcc/cp/pt.c
@@ -16422,6 +16422,7 @@ tsubst_omp_clauses (tree clauses, enum c_omp_region_type ort,
 	case OMP_CLAUSE_THREADS:
 	case OMP_CLAUSE_SIMD:
 	case OMP_CLAUSE_DEFAULTMAP:
+	case OMP_CLAUSE_ORDER:
 	case OMP_CLAUSE_INDEPENDENT:
 	case OMP_CLAUSE_AUTO:
 	case OMP_CLAUSE_SEQ:
diff --git a/gcc/cp/semantics.c b/gcc/cp/semantics.c
index aadfaff..1a21705 100644
--- a/gcc/cp/semantics.c
+++ b/gcc/cp/semantics.c
@@ -6127,6 +6127,7 @@ finish_omp_clauses (tree clauses, enum c_omp_region_type ort)
   bool branch_seen = false;
   bool copyprivate_seen = false;
   bool ordered_seen = false;
+  bool order_seen = false;
   bool schedule_seen = false;
   bool oacc_async = false;
   tree last_iterators = NULL_TREE;
@@ -7600,6 +7601,13 @@ finish_omp_clauses (tree clauses, enum c_omp_region_type ort)
 	  ordered_seen = true;
 	  break;
 
+	case OMP_CLAUSE_ORDER:
+	  if (order_seen)
+	    remove = true;
+	  else
+	    order_seen = true;
+	  break;
+
 	case OMP_CLAUSE_INBRANCH:
 	case OMP_CLAUSE_NOTINBRANCH:
 	  if (branch_seen)
@@ -7775,6 +7783,17 @@ finish_omp_clauses (tree clauses, enum c_omp_region_type ort)
 		      "%<reduction%> clause", "ordered");
 	  pc = &OMP_CLAUSE_CHAIN (c);
 	  continue;
+	case OMP_CLAUSE_ORDER:
+	  if (ordered_seen)
+	    {
+	      error_at (OMP_CLAUSE_LOCATION (c),
+			"%<order%> clause must not be used together "
+			"with %<ordered%>");
+	      *pc = OMP_CLAUSE_CHAIN (c);
+	      continue;
+	    }
+	  pc = &OMP_CLAUSE_CHAIN (c);
+	  continue;
 	case OMP_CLAUSE_NOWAIT:
 	  if (copyprivate_seen)
 	    {
diff --git a/gcc/gimplify.c b/gcc/gimplify.c
index 146a86c..ca7ad33 100644
--- a/gcc/gimplify.c
+++ b/gcc/gimplify.c
@@ -9263,6 +9263,7 @@ gimplify_scan_omp_clauses (tree *list_p, gimple_seq *pre_p,
 	case OMP_CLAUSE_NOGROUP:
 	case OMP_CLAUSE_THREADS:
 	case OMP_CLAUSE_SIMD:
+	case OMP_CLAUSE_ORDER:
 	case OMP_CLAUSE_IF_PRESENT:
 	case OMP_CLAUSE_FINALIZE:
 	  break;
@@ -10223,6 +10224,7 @@ gimplify_adjust_omp_clauses (gimple_seq *pre_p, gimple_seq body, tree *list_p,
 	case OMP_CLAUSE_SIMD:
 	case OMP_CLAUSE_HINT:
 	case OMP_CLAUSE_DEFAULTMAP:
+	case OMP_CLAUSE_ORDER:
 	case OMP_CLAUSE_USE_DEVICE_PTR:
 	case OMP_CLAUSE_IS_DEVICE_PTR:
 	case OMP_CLAUSE_ASYNC:
diff --git a/gcc/omp-low.c b/gcc/omp-low.c
index a855c5b..052ffc9 100644
--- a/gcc/omp-low.c
+++ b/gcc/omp-low.c
@@ -1402,6 +1402,7 @@ scan_sharing_clauses (tree clauses, omp_context *ctx)
 	case OMP_CLAUSE_SIMD:
 	case OMP_CLAUSE_NOGROUP:
 	case OMP_CLAUSE_DEFAULTMAP:
+	case OMP_CLAUSE_ORDER:
 	case OMP_CLAUSE_ASYNC:
 	case OMP_CLAUSE_WAIT:
 	case OMP_CLAUSE_GANG:
@@ -1595,6 +1596,7 @@ scan_sharing_clauses (tree clauses, omp_context *ctx)
 	case OMP_CLAUSE_SIMD:
 	case OMP_CLAUSE_NOGROUP:
 	case OMP_CLAUSE_DEFAULTMAP:
+	case OMP_CLAUSE_ORDER:
 	case OMP_CLAUSE_USE_DEVICE_PTR:
 	case OMP_CLAUSE_NONTEMPORAL:
 	case OMP_CLAUSE_ASYNC:
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 6c40496..ed3165e 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2019-07-12  Jakub Jelinek  <jakub@redhat.com>
+
+	* c-c++-common/gomp/order-1.c: New test.
+	* c-c++-common/gomp/order-2.c: New test.
+
 2019-07-11  Sunil K Pandey  <sunil.k.pandey@intel.com>
 
 	PR target/90980
diff --git a/gcc/testsuite/c-c++-common/gomp/order-1.c b/gcc/testsuite/c-c++-common/gomp/order-1.c
new file mode 100644
index 0000000..da4b73d
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/gomp/order-1.c
@@ -0,0 +1,53 @@
+void
+f1 (int *a)
+{
+  int i;
+  #pragma omp for order(concurrent)
+  for (i = 0; i < 128; i++)
+    a[i]++;
+  #pragma omp simd order ( concurrent )
+  for (i = 0; i < 128; i++)
+    a[i]++;
+  #pragma omp for simd order(concurrent)
+  for (i = 0; i < 128; i++)
+    a[i]++;
+}
+
+void
+f2 (int *a)
+{
+  int i;
+  #pragma omp parallel for order(concurrent)
+  for (i = 0; i < 128; i++)
+    a[i]++;
+  #pragma omp parallel for simd order (concurrent)
+  for (i = 0; i < 128; i++)
+    a[i]++;
+  #pragma omp teams distribute parallel for order(concurrent)
+  for (i = 0; i < 128; i++)
+    a[i]++;
+  #pragma omp teams distribute parallel for simd order(concurrent)
+  for (i = 0; i < 128; i++)
+    a[i]++;
+  #pragma omp teams
+  {
+    #pragma omp distribute parallel for order(concurrent)
+    for (i = 0; i < 128; i++)
+      a[i]++;
+    #pragma omp distribute parallel for simd order(concurrent)
+    for (i = 0; i < 128; i++)
+      a[i]++;
+  }
+  #pragma omp taskloop simd order (concurrent)
+  for (i = 0; i < 128; i++)
+    a[i]++;
+}
+
+void
+f3 (int *a)
+{
+  int i;
+  #pragma omp for order(concurrent) order(concurrent) order(concurrent)
+  for (i = 0; i < 128; i++)
+    a[i]++;
+}
diff --git a/gcc/testsuite/c-c++-common/gomp/order-2.c b/gcc/testsuite/c-c++-common/gomp/order-2.c
new file mode 100644
index 0000000..1a9adb0
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/gomp/order-2.c
@@ -0,0 +1,57 @@
+void
+f1 (int *a)
+{
+  int i;
+  #pragma omp for order				/* { dg-error "expected" } */
+  for (i = 0; i < 128; i++)
+    a[i]++;
+  #pragma omp for simd order :			/* { dg-error "expected" } */
+  for (i = 0; i < 128; i++)
+    a[i]++;
+  #pragma omp simd order ( foobar )		/* { dg-error "expected" } */
+  for (i = 0; i < 128; i++)
+    a[i]++;
+  #pragma omp for simd order( concurrent	/* { dg-error "expected" } */
+  for (i = 0; i < 128; i++)
+    a[i]++;
+  #pragma omp for simd order( concurrent : foo )/* { dg-error "expected" } */
+  for (i = 0; i < 128; i++)
+    a[i]++;
+}
+
+void
+f2 (int *a)
+{
+  int i;
+  #pragma omp teams
+  #pragma omp distribute order(concurrent)	/* { dg-error "'order' is not valid for '#pragma omp distribute'" } */
+  for (i = 0; i < 128; i++)
+    a[i]++;
+  #pragma omp taskloop order (concurrent)	/* { dg-error "'order' is not valid for '#pragma omp taskloop'" } */
+  for (i = 0; i < 128; i++)
+    a[i]++;
+  #pragma omp for order(concurrent) ordered	/* { dg-error "'order' clause must not be used together with 'ordered'" } */
+  for (i = 0; i < 128; i++)
+    {
+      #pragma omp ordered
+      a[i]++;
+    }
+  #pragma omp for ordered order(concurrent)	/* { dg-error "'order' clause must not be used together with 'ordered'" } */
+  for (i = 0; i < 128; i++)
+    {
+      #pragma omp ordered
+      a[i]++;
+    }
+  #pragma omp for ordered (1) order(concurrent)	/* { dg-error "'order' clause must not be used together with 'ordered'" } */
+  for (i = 0; i < 128; i++)
+    {
+      #pragma omp ordered depend (sink: i - 1)
+      #pragma omp ordered depend (source)
+    }
+  #pragma omp for order(concurrent)ordered (1)	/* { dg-error "'order' clause must not be used together with 'ordered'" } */
+  for (i = 0; i < 128; i++)
+    {
+      #pragma omp ordered depend (sink: i - 1)
+      #pragma omp ordered depend (source)
+    }
+}
diff --git a/gcc/tree-core.h b/gcc/tree-core.h
index b5dde47..8ac07e8 100644
--- a/gcc/tree-core.h
+++ b/gcc/tree-core.h
@@ -448,6 +448,9 @@ enum omp_clause_code {
   /* OpenMP clause: defaultmap (tofrom: scalar).  */
   OMP_CLAUSE_DEFAULTMAP,
 
+  /* OpenMP clause: order (concurrent).  */
+  OMP_CLAUSE_ORDER,
+
   /* Internally used only clause, holding SIMD uid.  */
   OMP_CLAUSE__SIMDUID_,
 
diff --git a/gcc/tree-nested.c b/gcc/tree-nested.c
index e703cd9..1527456 100644
--- a/gcc/tree-nested.c
+++ b/gcc/tree-nested.c
@@ -1343,6 +1343,7 @@ convert_nonlocal_omp_clauses (tree *pclauses, struct walk_stmt_info *wi)
 	case OMP_CLAUSE_THREADS:
 	case OMP_CLAUSE_SIMD:
 	case OMP_CLAUSE_DEFAULTMAP:
+	case OMP_CLAUSE_ORDER:
 	case OMP_CLAUSE_SEQ:
 	case OMP_CLAUSE_INDEPENDENT:
 	case OMP_CLAUSE_AUTO:
@@ -2073,6 +2074,7 @@ convert_local_omp_clauses (tree *pclauses, struct walk_stmt_info *wi)
 	case OMP_CLAUSE_THREADS:
 	case OMP_CLAUSE_SIMD:
 	case OMP_CLAUSE_DEFAULTMAP:
+	case OMP_CLAUSE_ORDER:
 	case OMP_CLAUSE_SEQ:
 	case OMP_CLAUSE_INDEPENDENT:
 	case OMP_CLAUSE_AUTO:
diff --git a/gcc/tree-pretty-print.c b/gcc/tree-pretty-print.c
index 742c284..a75f97a 100644
--- a/gcc/tree-pretty-print.c
+++ b/gcc/tree-pretty-print.c
@@ -1040,6 +1040,10 @@ dump_omp_clause (pretty_printer *pp, tree clause, int spc, dump_flags_t flags)
       pp_right_paren (pp);
       break;
 
+    case OMP_CLAUSE_ORDER:
+      pp_string (pp, "order(concurrent)");
+      break;
+
     case OMP_CLAUSE__SIMDUID_:
       pp_string (pp, "_simduid_(");
       dump_generic_node (pp, OMP_CLAUSE__SIMDUID__DECL (clause),
diff --git a/gcc/tree.c b/gcc/tree.c
index a609963..751370b 100644
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -342,7 +342,8 @@ unsigned const char omp_clause_num_ops[] =
   0, /* OMP_CLAUSE_THREADS  */
   0, /* OMP_CLAUSE_SIMD  */
   1, /* OMP_CLAUSE_HINT  */
-  0, /* OMP_CLAUSE_DEFALTMAP  */
+  0, /* OMP_CLAUSE_DEFAULTMAP  */
+  0, /* OMP_CLAUSE_ORDER  */
   1, /* OMP_CLAUSE__SIMDUID_  */
   0, /* OMP_CLAUSE__SIMT_  */
   0, /* OMP_CLAUSE_INDEPENDENT  */
@@ -424,6 +425,7 @@ const char * const omp_clause_code_name[] =
   "simd",
   "hint",
   "defaultmap",
+  "order",
   "_simduid_",
   "_simt_",
   "independent",
@@ -12340,6 +12342,7 @@ walk_tree_1 (tree *tp, walk_tree_fn func, void *data,
 	case OMP_CLAUSE_THREADS:
 	case OMP_CLAUSE_SIMD:
 	case OMP_CLAUSE_DEFAULTMAP:
+	case OMP_CLAUSE_ORDER:
 	case OMP_CLAUSE_AUTO:
 	case OMP_CLAUSE_SEQ:
 	case OMP_CLAUSE_TILE: