Clean up Fortran OpenACC wait clause handling

"wait" can be deduced from "wait_list".

	gcc/fortran/
	* gfortran.h (struct gfc_omp_clauses): Remove "wait".  Adjust all
	users.

From-SVN: r266685

gcc/fortran/ChangeLog

 2018-11-30  Thomas Schwinge  <thomas@codesourcery.com>
 
+	* gfortran.h (struct gfc_omp_clauses): Remove "wait".  Adjust all
+	users.
+
 	* openmp.c (gfc_match_omp_clauses): Support multiple OpenACC wait
 	clauses.
 

gcc/fortran/gfortran.h

@@ -1345,7 +1345,7 @@ typedef struct gfc_omp_clauses
   gfc_expr_list *wait_list;
   gfc_expr_list *tile_list;
   unsigned async:1, gang:1, worker:1, vector:1, seq:1, independent:1;
-  unsigned wait:1, par_auto:1, gang_static:1;
+  unsigned par_auto:1, gang_static:1;
   unsigned if_present:1, finalize:1;
   locus loc;
 

gcc/fortran/openmp.c

@@ -1878,7 +1878,6 @@ gfc_match_omp_clauses (gfc_omp_clauses **cp, const omp_mask mask,
 	  if ((mask & OMP_CLAUSE_WAIT)
 	      && gfc_match ("wait") == MATCH_YES)
 	    {
-	      c->wait = true;
 	      match m = match_oacc_expr_list (" (", &c->wait_list, false);
 	      if (m == MATCH_ERROR)
 		{
@@ -4779,10 +4778,8 @@ resolve_omp_clauses (gfc_code *code, gfc_omp_clauses *omp_clauses,
     resolve_positive_int_expr (omp_clauses->worker_expr, "WORKER");
   if (omp_clauses->vector_expr)
     resolve_positive_int_expr (omp_clauses->vector_expr, "VECTOR");
-  if (omp_clauses->wait)
-    if (omp_clauses->wait_list)
-      for (el = omp_clauses->wait_list; el; el = el->next)
-	resolve_scalar_int_expr (el->expr, "WAIT");
+  for (el = omp_clauses->wait_list; el; el = el->next)
+    resolve_scalar_int_expr (el->expr, "WAIT");
   if (omp_clauses->collapse && omp_clauses->tile_list)
     gfc_error ("Incompatible use of TILE and COLLAPSE at %L", &code->loc);
   if (omp_clauses->depend_source && code->op != EXEC_OMP_ORDERED)