openmp: Add support for 'target_device' context selector set

openmp: Add support for 'target_device' context selector set

2022-01-25  Kwok Cheung Yeung  <kcy@codesourcery.com>

	gcc/
	* builtin-types.def (BT_FN_BOOL_INT_CONST_PTR_CONST_PTR_CONST_PTR): New
	type.
	* omp-builtins.def (BUILT_IN_GOMP_EVALUATE_TARGET_DEVICE): New builtin.
	* omp-general.c (omp_context_selector_matches): Handle 'target_device'
	selector set.
	(omp_dynamic_cond): Generate expression tree for 'target_device'
	selector set.
	(omp_context_compute_score): Handle selectors in 'target_device' set.

	gcc/c/
	* c-parser.c (omp_target_device_selectors): New.
	(c_parser_omp_context_selector): Accept 'target_device' selector set.
	Treat 'device_num' selector as expression.
	(c_parser_omp_context_selector_specification): Handle 'target_device'
	selector set.

	gcc/cp/
	* parser.c (omp_target_device_selectors): New.
	(cp_parser_omp_context_selector): Accept 'target_device' selector set.
	Treat 'device_num' selector as expression.
	(cp_parser_omp_context_selector_specification): Handle 'target_device'
	selector set.

	gcc/fortran/
	* openmp.c (omp_target_device_selectors): New.
	(gfc_match_omp_context_selector): Accept 'target_device' selector set.
	Treat 'device_num' selector as expression.
	(gfc_match_omp_context_selector_specification): Handle 'target_device'
	selector set.
	* types.def (BT_FN_BOOL_INT_CONST_PTR_CONST_PTR_CONST_PTR): New type.

	gcc/testsuite/
	* c-c++-common/gomp/metadirective-7.c: New.
	* gfortran.dg/gomp/metadirective-7.f90: New.

	libgomp/
	* Makefile.am (libgomp_la_SOURCES): Add selector.c.
	* Makefile.am: Regenerate.
	* config/gcn/selector.c: New.
	* config/linux/selector.c: New.
	* config/linux/x86/selector.c: New.
	* config/nvptx/selector.c: New.
	* libgomp-plugin.h (GOMP_OFFLOAD_evaluate_device): New.
	* libgomp.h (struct gomp_device_descr): Add evaluate_device_func field.
	* libgomp.map (GOMP_5.1): Add GOMP_evaluate_target_device.
	* libgomp_g.h (GOMP_evaluate_current_device): New.
	(GOMP_evaluate_target_device): New.
	* oacc-host.c (host_evaluate_device): New.
	(host_openacc_exec): Initialize evaluate_device_func field to
	host_evaluate_device.
	* plugin/plugin-gcn.c (GOMP_OFFLOAD_evaluate_device): New.
	* plugin/plugin-nvptx.c (struct ptx_device): Add compute_major and
	compute_minor fields.
	(nvptx_open_device): Read compute capability information from device.
	(CHECK_ISA): New macro.
	(GOMP_OFFLOAD_evaluate_device): New.
	* selector.c: New.
	* target.c (GOMP_evaluate_target_device): New.
	(gomp_load_plugin_for_device): Load evaulate_device plugin function.
	* testsuite/libgomp.c-c++-common/metadirective-5.c: New testcase.
	* testsuite/libgomp.fortran/metadirective-5.f90: New testcase.