OpenMP/Fortran: 'declare target' fix + parse 'local' clause; parse groupprivate

OpenMP/Fortran: 'declare target' fix + parse 'local' clause; parse groupprivate

Declare target's 'link' clause disallows 'nohost'; check for it.
Additionally, some other cleanups have been done.

The 'local' clause to 'declare target' is now supported in the FE,
but a 'sorry, unimplemented' is printed at TREE generation time.

This commit also adds the 'groupprivate' directive, which implies
'declare target' with the 'local' clause. And for completeness also
the 'dyn_groupprivate' clause to 'target'. However, all those new
features will eventually print 'sorry, unimplemented' for now.

gcc/fortran/ChangeLog:

	* dump-parse-tree.cc (show_attr): Handle OpenMP's 'local' clause
	and the 'groupprivate' directive.
	(show_omp_clauses): Handle dyn_groupprivate.
	* frontend-passes.cc (gfc_code_walker): Walk dyn_groupprivate.
	* gfortran.h (enum gfc_statement): Add ST_OMP_GROUPPRIVATE.
	(enum gfc_omp_fallback, gfc_add_omp_groupprivate,
	gfc_add_omp_declare_target_local): New.
	* match.h (gfc_match_omp_groupprivate): New.
	* module.cc (enum ab_attribute, mio_symbol_attribute, load_commons,
	write_common_0): Handle 'groupprivate' + declare target's 'local'.
	* openmp.cc (gfc_omp_directives): Add 'groupprivate'.
	(gfc_free_omp_clauses): Free dyn_groupprivate.
	(enum omp_mask2): Add OMP_CLAUSE_LOCAL and OMP_CLAUSE_DYN_GROUPPRIVATE.
	(gfc_match_omp_clauses): Match them.
	(OMP_TARGET_CLAUSES): Add OMP_CLAUSE_DYN_GROUPPRIVATE.
	(OMP_DECLARE_TARGET_CLAUSES): Add OMP_CLAUSE_LOCAL.
	(gfc_match_omp_declare_target): Handle groupprivate + fixes.
	(gfc_match_omp_threadprivate): Code move to and calling now ...
	(gfc_match_omp_thread_group_private): ... this new function.
	Also handle groupprivate.
	(gfc_match_omp_groupprivate): New.
	(resolve_omp_clauses): Resolve dyn_groupprivate.
	* parse.cc (decode_omp_directive): Match groupprivate.
	(case_omp_decl, parse_spec, gfc_ascii_statement): Handle it.
	* resolve.cc (resolve_symbol): Handle groupprivate.
	* symbol.cc (gfc_check_conflict, gfc_copy_attr): Handle 'local'
	and 'groupprivate'.
	(gfc_add_omp_groupprivate, gfc_add_omp_declare_target_local): New.
	* trans-common.cc (build_common_decl,
	accumulate_equivalence_attributes): Print 'sorry' for
	groupprivate and declare target's local.
	* trans-decl.cc (add_attributes_to_decl): Likewise..
	* trans-openmp.cc (gfc_trans_omp_clauses): Print 'sorry' for
	dyn_groupprivate.
	(fallback): Process declare target with link/local as
	done for 'enter'.

gcc/testsuite/ChangeLog:

	* gfortran.dg/gomp/crayptr2.f90: Move dg-error line.
	* gfortran.dg/gomp/declare-target-2.f90: Extend.
	* gfortran.dg/gomp/declare-target-4.f90: Update comment,
	enable one test.
	* gfortran.dg/gomp/declare-target-5.f90: Update dg- wording,
	add new test.
	* gfortran.dg/gomp/declare-target-indirect-2.f90: Expect
	'device_type(any)' in scan-tree-dump.
	* gfortran.dg/gomp/declare-target-6.f90: New test.
	* gfortran.dg/gomp/dyn_groupprivate-1.f90: New test.
	* gfortran.dg/gomp/dyn_groupprivate-2.f90: New test.
	* gfortran.dg/gomp/groupprivate-1.f90: New test.
	* gfortran.dg/gomp/groupprivate-2.f90: New test.
	* gfortran.dg/gomp/groupprivate-3.f90: New test.
	* gfortran.dg/gomp/groupprivate-4.f90: New test.
	* gfortran.dg/gomp/groupprivate-5.f90: New test.
	* gfortran.dg/gomp/groupprivate-6.f90: New test.