OpenMP: 'interop' construct - add ME support + target-independent libgomp

OpenMP: 'interop' construct - add ME support + target-independent libgomp

This patch partially enables use of the OpenMP interop construct by adding
middle end support, mostly in the omplower pass, and in the target-independent
part of the libgomp runtime. It follows up on previous patches for C, C++ and
Fortran front ends support. The full interop feature requires another patch to
enable foreign runtime support in libgomp plugins.

gcc/ChangeLog:

	* builtin-types.def
	(BT_FN_VOID_INT_INT_PTR_PTR_PTR_INT_PTR_INT_PTR_UINT_PTR): New.
	* gimple-low.cc (lower_stmt): Handle GIMPLE_OMP_INTEROP.
	* gimple-pretty-print.cc (dump_gimple_omp_interop): New function.
	(pp_gimple_stmt_1): Handle GIMPLE_OMP_INTEROP.
	* gimple.cc (gimple_build_omp_interop): New function.
	(gimple_copy): Handle GIMPLE_OMP_INTEROP.
	* gimple.def (GIMPLE_OMP_INTEROP): Define.
	* gimple.h (gimple_build_omp_interop): Declare.
	(gimple_omp_interop_clauses): New function.
	(gimple_omp_interop_clauses_ptr): Likewise.
	(gimple_omp_interop_set_clauses): Likewise.
	(gimple_return_set_retval): Handle GIMPLE_OMP_INTEROP.
	* gimplify.cc (gimplify_scan_omp_clauses): Handle OMP_CLAUSE_INIT,
	OMP_CLAUSE_USE and OMP_CLAUSE_DESTROY.
	(gimplify_omp_interop): New function.
	(gimplify_expr): Replace sorry with call to gimplify_omp_interop.
	* omp-builtins.def (BUILT_IN_GOMP_INTEROP): Define.
	* omp-low.cc (scan_sharing_clauses): Handle OMP_CLAUSE_INIT,
	OMP_CLAUSE_USE and OMP_CLAUSE_DESTROY.
	(scan_omp_1_stmt): Handle GIMPLE_OMP_INTEROP.
	(lower_omp_interop_action_clauses): New function.
	(lower_omp_interop): Likewise.
	(lower_omp_1): Handle GIMPLE_OMP_INTEROP.

gcc/c/ChangeLog:

	* c-parser.cc (c_parser_omp_clause_destroy): Make addressable.
	(c_parser_omp_clause_init): Make addressable.

gcc/cp/ChangeLog:

	* parser.cc (cp_parser_omp_clause_init): Make addressable.

gcc/fortran/ChangeLog:

	* trans-openmp.cc (gfc_trans_omp_clauses): Make OMP_CLAUSE_DESTROY and
	OMP_CLAUSE_INIT addressable.
	* types.def (BT_FN_VOID_INT_INT_PTR_PTR_PTR_INT_PTR_INT_PTR_UINT_PTR):
	New.

include/ChangeLog:

	* gomp-constants.h (GOMP_DEVICE_DEFAULT_OMP_61, GOMP_INTEROP_TARGET,
	GOMP_INTEROP_TARGETSYNC, GOMP_INTEROP_FLAG_NOWAIT): Define.

libgomp/ChangeLog:

	* icv-device.c (omp_set_default_device): Check
	GOMP_DEVICE_DEFAULT_OMP_61.
	* libgomp-plugin.h (struct interop_obj_t): New.
	(enum gomp_interop_flag): New.
	(GOMP_OFFLOAD_interop): Declare.
	(GOMP_OFFLOAD_get_interop_int): Declare.
	(GOMP_OFFLOAD_get_interop_ptr): Declare.
	(GOMP_OFFLOAD_get_interop_str): Declare.
	(GOMP_OFFLOAD_get_interop_type_desc): Declare.
	* libgomp.h (_LIBGOMP_OMP_LOCK_DEFINED): Define.
	(struct gomp_device_descr): Add interop_func, get_interop_int_func,
	get_interop_ptr_func, get_interop_str_func, get_interop_type_desc_func.
	* libgomp.map: Add GOMP_interop.
	* libgomp_g.h (GOMP_interop): Declare.
	* target.c (resolve_device): Handle GOMP_DEVICE_DEFAULT_OMP_61.
	(omp_get_interop_int): Replace stub with actual implementation.
	(omp_get_interop_ptr): Likewise.
	(omp_get_interop_str): Likewise.
	(omp_get_interop_type_desc): Likewise.
	(struct interop_data_t): Define.
	(gomp_interop_internal): New function.
	(GOMP_interop): Likewise.
	(gomp_load_plugin_for_device): Load symbols for get_interop_int,
	get_interop_ptr, get_interop_str and get_interop_type_desc.
	* testsuite/libgomp.c-c++-common/interop-1.c: New test.

gcc/testsuite/ChangeLog:

	* c-c++-common/gomp/interop-1.c: Remove dg-prune-output "sorry".
	* c-c++-common/gomp/interop-2.c: Likewise.
	* c-c++-common/gomp/interop-3.c: Likewise.
	* c-c++-common/gomp/interop-4.c: Remove dg-message "not supported".
	* g++.dg/gomp/interop-5.C: Likewise.
	* gfortran.dg/gomp/interop-4.f90: Likewise.
	* c-c++-common/gomp/interop-5.c: New test.
	* gfortran.dg/gomp/interop-5.f90: New test.

Co-authored-by: Tobias Burnus <tburnus@baylibre.com>