2015-10-27  James Norris  <jnorris@codesourcery.com>
	    Joseph Myers  <joseph@codesourcery.com>

	gcc/
	* c-family/c-pragma.c (oacc_pragmas): Add entry for declare directive. 
	* c-family/c-pragma.h (enum pragma_kind): Add PRAGMA_OACC_DECLARE.
	(enum pragma_omp_clause): Add PRAGMA_OACC_CLAUSE_DEVICE_RESIDENT.
	* c/c-parser.c (c_parser_pragma): Handle PRAGMA_OACC_DECLARE.
	(c_parser_omp_clause_name): Handle 'device_resident' clause.
	(c_parser_oacc_data_clause): Handle PRAGMA_OACC_CLAUSE_DEVICE_RESIDENT
	and PRAGMA_OMP_CLAUSE_LINK.
	(c_parser_oacc_all_clauses): Handle PRAGMA_OACC_CLAUSE_DEVICE_RESIDENT
	and PRAGMA_OACC_CLAUSE_LINK.
	(OACC_DECLARE_CLAUSE_MASK): New definition.
	(c_parser_oacc_declare): New function.
	* cp/parser.c (cp_parser_omp_clause_name): Handle 'device_resident'
	clause.
	(cp_parser_oacc_data_clause): Handle PRAGMA_OACC_CLAUSE_DEVICE_RESIDENT
	and PRAGMA_OMP_CLAUSE_LINK.
	(OACC_DECLARE_CLAUSE_MASK): New definition.
	(cp_parser_oacc_declare): New function.
	(cp_paser_oacc_all_clauses): Handle PRAGMA_OACC_CLAUSE_DEVICE_RESIDENT
	and PRAGMA_OMP_CLAUSE_LINK.
	(cp_parser_pragma): Handle PRAGMA_OACC_DECLARE.
	* cp/pt.c (tsubst_expr): Handle OACC_DECLARE.
	* gimple.h (enum gf_mask): Add GF_OMP_TARGET_KIND_OACC_DECLARE.
	(is_gomple_omp_oacc): Handle GF_OMP_TARGET_KIND_OACC_DECLARE.
	* gimplify.c (struct gimplify_omp_ctx): New field.
	(new_omp_context): Initialize new field.
	(omp_default_clause): Handle device resident variable.
	(gimplify_oacc_declare): New function.
	(device_resident_p): New function.
	(gimplify_expr): Handle OACC_DECLARE.
	(gimplify_body): Handle updating of declare'd variables.
	* omp-builtins.def (BUILT_IN_GOACC_STATIC, BUILT_IN_GOACC_DECLARE):
	New builtins.
	* omp-low.c (expand_omp_target): Handle
	GF_OMP_TARGET_KIND_OACC_DECLARE and BUILTIN_GOACC_DECLARE.
	(lower_omp_target): Handle GF_OMP_TARGET_KIND_OACC_DECLARE,
	GOMP_MAP_DEVICE_RESIDENT and GOMP_MAP_LINK.
	(make_gimple_omp_edges): Handle GF_OMP_TARGET_KIND_OACC_DECLARE.
	* tree.def (OACC_DECLARE): Update operands.
	* tree.h (OACC_DECLARE_RETURN_CLAUSES): New definition.
	* varpool.c (make_offloadable): New function.
	(get_create): Refactor offload functionality.

	gcc/testsuite
	* c-c++-common/goacc/declare-1.c: New test.
	* c-c++-common/goacc/declare-2.c: Likewise.

	include/
	* gomp-constants.h (enum gomp_map_kind): Add GOMP_MAP_DEVICE_RESIDENT
	and GOMP_MAP_LINK.

	libgomp/

	* libgomp.map (GOACC_2.0.1): Export GOACC_declare.
	* oacc-parallel.c (GOACC_declare): New function.
	* testsuite/libgomp.oacc-c-c++-common/declare-1.c: New test.
	* testsuite/libgomp.oacc-c-c++-common/declare-5.c: Likewise.