* gimplify.c (gimplify_scan_omp_clauses): Initialize sc

	* gimplify.c (gimplify_scan_omp_clauses): Initialize sc
	to NULL to avoid false positive warnings.
	* omp-low.c (check_omp_nesting_restrictions): Diagnose
	depend(source) or depend(sink:...) on #pragma omp target *.
	(expand_omp_target): Pass flags and depend arguments to
	GOMP_target_{41,update_41,enter_exit_data} libcalls.
	(lower_depend_clauses): Change first argument from gimple
	to tree * pointing to the stmt's clauses.
	(lower_omp_taskreg): Adjust caller.
	(lower_omp_target): Lower depend clauses.  Always use 16-bit
	kinds and 8 as align shift.  Use
	GOMP_MAP_DELETE_ZERO_LEN_ARRAY_SECTION for zero length array
	section in map clause with delete kind.
	* omp-builtins.def (BUILT_IN_GOMP_TARGET,
	BUILT_IN_GOMP_TARGET_ENTER_EXIT_DATA): Add flags and depend arguments.
	(BUILT_IN_GOMP_TARGET_UPDATE): Change library function name
	to GOMP_target_update_41.  Add flags and depend arguments,
	remove unused argument.
	* builtin-types.def (BT_FN_VOID_INT_PTR_SIZE_PTR_PTR_PTR,
	BT_FN_VOID_INT_OMPFN_SIZE_PTR_PTR_PTR): Remove.
	(BT_FN_VOID_INT_SIZE_PTR_PTR_PTR_UINT_PTR,
	BT_FN_VOID_INT_OMPFN_SIZE_PTR_PTR_PTR_UINT_PTR): New.
gcc/c/
	* c-typeck.c (handle_omp_array_sections): Set
	OMP_CLAUSE_MAP_MAYBE_ZERO_LENGTH_ARRAY_SECTION even for
	GOMP_MAP_DELETE kinds.
gcc/cp/
	* semantics.c (handle_omp_array_sections): Set
	OMP_CLAUSE_MAP_MAYBE_ZERO_LENGTH_ARRAY_SECTION even for
	GOMP_MAP_DELETE kinds.
gcc/fortran/
	* types.def (BT_FN_VOID_INT_PTR_SIZE_PTR_PTR_PTR,
	BT_FN_VOID_INT_OMPFN_SIZE_PTR_PTR_PTR): Remove.
	(BT_FN_VOID_INT_SIZE_PTR_PTR_PTR_UINT_PTR,
	BT_FN_VOID_INT_OMPFN_SIZE_PTR_PTR_PTR_UINT_PTR): New.
include/
	* gomp-constants.h (enum gomp_map_kind): Add
	GOMP_MAP_DELETE_ZERO_LEN_ARRAY_SECTION.
	(GOMP_TARGET_FLAG_NOWAIT, GOMP_TARGET_FLAG_EXIT_DATA): Define.
libgomp/
	* libgomp_g.h (GOMP_target_41, GOMP_target_enter_exit_data): Add
	flags and depend arguments.
	(GOMP_target_update_41): New prototype.
	* libgomp.h (gomp_task_maybe_wait_for_dependencies): New prototype.
	* libgomp.map (GOMP_4.1): Add GOMP_target_update_41.
	* task.c (gomp_task_maybe_wait_for_dependencies): Remove prototype.
	No longer static.
	* target.c (GOMP_target_41): Add flags and depend arguments.  If
	depend is non-NULL, wait until all dependencies are satisfied.
	(GOMP_target_enter_exit_data): Likewise.  Use
	flags & GOMP_TARGET_FLAG_EXIT_DATA to determine if it is enter
	or exit data construct, instead of analysing kinds.
	(gomp_exit_data): Handle GOMP_MAP_DELETE_ZERO_LEN_ARRAY_SECTION.
	(GOMP_target_update_41): New function.
	* testsuite/libgomp.c/target-24.c: New test.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gomp-4_1-branch@227410 138bc75d-0d04-0410-961f-82ee72b054a4