Fortran/OpenMP: Add omp loop [PR99928]

Fortran/OpenMP: Add omp loop [PR99928]

	PR middle-end/99928

gcc/fortran/ChangeLog:

	* dump-parse-tree.c (show_omp_clauses): Handle bind clause.
	(show_omp_node): Handle loop directive.
	* frontend-passes.c (gfc_code_walker): Likewise.
	* gfortran.h (enum gfc_statement): Add
	ST_OMP_(END_)(TARGET_)(|PARALLEL_|TEAMS_)LOOP.
	(enum gfc_omp_bind_type): New.
	(gfc_omp_clauses): Use it.
	(enum gfc_exec_op): Add EXEC_OMP_(TARGET_)(|PARALLEL_|TEAMS_)LOOP.
	* match.h (gfc_match_omp_loop, gfc_match_omp_parallel_loop,
	gfc_match_omp_target_parallel_loop, gfc_match_omp_target_teams_loop,
	gfc_match_omp_teams_loop): New.
	* openmp.c (enum omp_mask1): Add OMP_CLAUSE_BIND.
	(gfc_match_omp_clauses): Handle it.
	(OMP_LOOP_CLAUSES, gfc_match_omp_loop, gfc_match_omp_teams_loop,
	gfc_match_omp_target_teams_loop, gfc_match_omp_parallel_loop,
	gfc_match_omp_target_parallel_loop): New.
	(resolve_omp_clauses, resolve_omp_do, omp_code_to_statement,
	gfc_resolve_omp_directive): Handle omp loop.
	* parse.c (decode_omp_directive case_exec_markers, gfc_ascii_statement,
	parse_omp_do, parse_executable): Likewise.
	(parse_omp_structured_block): Remove ST_ which use parse_omp_do.
	* resolve.c (gfc_resolve_blocks): Add omp loop.
	* st.c (gfc_free_statement): Likewise.
	* trans-openmp.c (gfc_trans_omp_clauses): Handle bind clause.
	(gfc_trans_omp_do, gfc_trans_omp_parallel_do, gfc_trans_omp_distribute,
	gfc_trans_omp_teams, gfc_trans_omp_target, gfc_trans_omp_directive):
	Handle loop directive.
	(gfc_split_omp_clauses): Likewise; fix firstprivate/lastprivate
	and (in_)reduction for taskloop.
	* trans.c (trans_code): Handle omp loop directive.

gcc/testsuite/ChangeLog:

	* gfortran.dg/gomp/pr99928-3.f90: Add 'default(none)', following
	C/C++ version of the patch.
	* gfortran.dg/gomp/loop-1.f90: New test.
	* gfortran.dg/gomp/loop-2.f90: New test.
	* gfortran.dg/gomp/pr99928-1.f90: New test; based on C/C++ test.
	* gfortran.dg/gomp/pr99928-11.f90: Likewise.
	* gfortran.dg/gomp/pr99928-2.f90: Likewise.
	* gfortran.dg/gomp/pr99928-4.f90: Likewise.
	* gfortran.dg/gomp/pr99928-5.f90: Likewise.
	* gfortran.dg/gomp/pr99928-6.f90: Likewise.
	* gfortran.dg/gomp/pr99928-8.f90: Likewise.
	* gfortran.dg/goacc/omp.f95: Use 'acc kernels loops' instead
	of 'acc loops' to hide unrelated bug for now.
	* gfortran.dg/goacc/omp-fixed.f: Likewise