gcc/fortran/
	* dump-parse-tree.c (show_omp_namelist): Dump reduction
	id in each list item.
	(show_omp_node): Only handle OMP_LIST_REDUCTION, not
	OMP_LIST_REDUCTION_FIRST .. OMP_LIST_REDUCTION_LAST.  Don't
	dump reduction id here.
	* frontend-passes.c (dummy_code_callback): Renamed to...
	(gfc_dummy_code_callback): ... this.  No longer static.
	(optimize_reduction): Use gfc_dummy_code_callback instead of
	dummy_code_callback.
	* gfortran.h (gfc_statement): Add ST_OMP_DECLARE_REDUCTION.
	(symbol_attribute): Add omp_udr_artificial_var bitfield.
	(gfc_omp_reduction_op): New enum.
	(gfc_omp_namelist): Add rop and udr fields.
	(OMP_LIST_PLUS, OMP_LIST_REDUCTION_FIRST, OMP_LIST_MULT,
	OMP_LIST_SUB, OMP_LIST_AND, OMP_LIST_OR, OMP_LIST_EQV,
	OMP_LIST_NEQV, OMP_LIST_MAX, OMP_LIST_MIN, OMP_LIST_IAND,
	OMP_LIST_IOR, OMP_LIST_IEOR, OMP_LIST_REDUCTION_LAST): Removed.
	(OMP_LIST_REDUCTION): New.
	(gfc_omp_udr): New type.
	(gfc_get_omp_udr): Define.
	(gfc_symtree): Add n.omp_udr field.
	(gfc_namespace): Add omp_udr_root field, add omp_udr_ns bitfield.
	(gfc_free_omp_udr, gfc_omp_udr_find, gfc_resolve_omp_udrs,
	gfc_dummy_code_callback): New prototypes.
	* match.h (gfc_match_omp_declare_reduction): New prototype.
	* module.c (MOD_VERSION): Increase to 13.
	(omp_declare_reduction_stmt): New array.
	(mio_omp_udr_expr, write_omp_udr, write_omp_udrs, load_omp_udrs):
	New functions.
	(read_module): Read OpenMP user defined reductions.
	(write_module): Write OpenMP user defined reductions.
	* openmp.c: Include arith.h.
	(gfc_free_omp_udr, gfc_find_omp_udr): New functions.
	(gfc_match_omp_clauses): Handle user defined reductions.
	Store reduction kind into gfc_omp_namelist instead of using
	several OMP_LIST_* entries.
	(match_udr_expr, gfc_omp_udr_predef, gfc_omp_udr_find,
	gfc_match_omp_declare_reduction): New functions.
	(resolve_omp_clauses): Adjust for reduction clauses being only
	in OMP_LIST_REDUCTION list.  Diagnose missing UDRs.
	(struct omp_udr_callback_data): New type.
	(omp_udr_callback, gfc_resolve_omp_udr, gfc_resolve_omp_udrs): New
	functions.
	* parse.c (decode_omp_directive): Handle !$omp declare reduction.
	(case_decl): Add ST_OMP_DECLARE_REDUCTION.
	(gfc_ascii_statement): Print ST_OMP_DECLARE_REDUCTION.
	* resolve.c (resolve_fl_variable): Allow len=: or len=* on
	sym->attr.omp_udr_artificial_var symbols.
	(resolve_types): Call gfc_resolve_omp_udrs.
	* symbol.c (gfc_get_uop): If gfc_current_ns->omp_udr_ns,
	use parent ns instead of gfc_current_ns.
	(gfc_get_sym_tree): Don't insert symbols into
	namespaces with omp_udr_ns set.
	(free_omp_udr_tree): New function.
	(gfc_free_namespace): Call it.
	* trans-openmp.c (struct omp_udr_find_orig_data): New type.
	(omp_udr_find_orig, gfc_trans_omp_udr_expr): New functions.
	(gfc_trans_omp_array_reduction): Renamed to...
	(gfc_trans_omp_array_reduction_or_udr): ... this.  Remove SYM
	argument, instead pass gfc_omp_namelist pointer N.  Handle
	user defined reductions.
	(gfc_trans_omp_reduction_list): Remove REDUCTION_CODE argument.
	Handle user defined reductions and reduction ops in gfc_omp_namelist.
	(gfc_trans_omp_clauses): Adjust for just a single OMP_LIST_REDUCTION
	list.
	(gfc_split_omp_clauses): Likewise.
gcc/testsuite/
	* gfortran.dg/gomp/allocatable_components_1.f90: Adjust for
	reduction clause diagnostic changes.
	* gfortran.dg/gomp/appendix-a/a.31.3.f90: Likewise.
	* gfortran.dg/gomp/reduction1.f90: Likewise.
	* gfortran.dg/gomp/reduction3.f90: Likewise.
	* gfortran.dg/gomp/udr1.f90: New test.
	* gfortran.dg/gomp/udr2.f90: New test.
	* gfortran.dg/gomp/udr3.f90: New test.
	* gfortran.dg/gomp/udr4.f90: New test.
	* gfortran.dg/gomp/udr5.f90: New test.
	* gfortran.dg/gomp/udr6.f90: New test.
	* gfortran.dg/gomp/udr7.f90: New test.
libgomp/
	* testsuite/libgomp.fortran/simd1.f90: New test.
	* testsuite/libgomp.fortran/udr1.f90: New test.
	* testsuite/libgomp.fortran/udr2.f90: New test.
	* testsuite/libgomp.fortran/udr3.f90: New test.
	* testsuite/libgomp.fortran/udr4.f90: New test.
	* testsuite/libgomp.fortran/udr5.f90: New test.
	* testsuite/libgomp.fortran/udr6.f90: New test.
	* testsuite/libgomp.fortran/udr7.f90: New test.
	* testsuite/libgomp.fortran/udr8.f90: New test.
	* testsuite/libgomp.fortran/udr9.f90: New test.
	* testsuite/libgomp.fortran/udr10.f90: New test.
	* testsuite/libgomp.fortran/udr11.f90: New test.

From-SVN: r211303