Fortran: OpenMP 5.0 (in_,task_)reduction clause extensions

Fortran: OpenMP 5.0 (in_,task_)reduction clause extensions

gcc/fortran/ChangeLog:

	* dump-parse-tree.c (show_omp_clauses): Handle new reduction enums.
	* gfortran.h (OMP_LIST_REDUCTION_INSCAN, OMP_LIST_REDUCTION_TASK,
	OMP_LIST_IN_REDUCTION, OMP_LIST_TASK_REDUCTION): Add enums.
	* openmp.c (enum omp_mask1): Add OMP_CLAUSE_IN_REDUCTION
	and OMP_CLAUSE_TASK_REDUCTION.
	(gfc_match_omp_clause_reduction): Extend reduction handling;
	moved from ...
	(gfc_match_omp_clauses): ... here. Add calls to it.
	(OMP_TASK_CLAUSES, OMP_TARGET_CLAUSES, OMP_TASKLOOP_CLAUSES):
	Add OMP_CLAUSE_IN_REDUCTION.
	(gfc_match_omp_taskgroup): Add task_reduction matching.
	(resolve_omp_clauses): Update for new reduction clause changes;
	remove removed nonmonotonic-schedule restrictions.
	(gfc_resolve_omp_parallel_blocks): Add new enums to switch.
	* trans-openmp.c (gfc_omp_clause_default_ctor,
	gfc_trans_omp_reduction_list, gfc_trans_omp_clauses,
	gfc_split_omp_clauses): Handle updated reduction clause.

gcc/ChangeLog:

	* gimplify.c (gimplify_scan_omp_clauses, gimplify_omp_loop): Use 'do'
	instead of 'for' in error messages for Fortran.
	* omp-low.c (check_omp_nesting_restrictions): Likewise

gcc/testsuite/ChangeLog:

	* gfortran.dg/gomp/schedule-modifiers-2.f90: Remove some dg-error.
	* gfortran.dg/gomp/reduction4.f90: New test.
	* gfortran.dg/gomp/reduction5.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-1.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-2.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-3.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-4.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-5.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-6.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-7.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-8.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-9.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-10.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-11.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-12.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-13.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-14.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-15.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-16.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-17.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-18.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-19.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-20.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-21.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-22.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-23.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-24.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-25.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-26.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-27.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-28.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-29.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-30.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-31.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-32.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-33.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-34.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-35.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-36.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-37.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-38.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-39.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-40.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-41.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-42.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-43.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-44.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-45.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-46.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-47.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-48.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-49.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-50.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-51.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-52.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-53.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-54.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-55.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-56.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-57.f90: New test.
	* gfortran.dg/gomp/workshare-reduction-58.f90: New test.