cobol: Eliminate exception "blob"; streamline some code generation.

cobol: Eliminate exception "blob"; streamline some code generation.

This eliminates some of the last vestiges of creating a structure at host-time
that is intended for use at target-time.

It removes some unnecessary processing when exceptions are not enabled.

It improves the creation of code that handles table subscripts and refmod
parameters.

gcc/cobol/ChangeLog:

	* cobol1.cc (cobol_langhook_handle_option): Eliminate OPT_M.
	* except.cc (cbl_enabled_exception_t::dump): Formatting.
	(symbol_declaratives_add): Remove.
	(declarative_runtime_match): Change to no-blob processing.
	* exceptg.h (declarative_runtime_match): Change declaration.
	(symbol_declaratives_add): Remove declaration.
	* gcobc: Dialect handling.
	* genapi.cc (parser_compile_ecs): Formatting; add SHOW_IF_PARSE.
	(parser_compile_dcls): Likewise.
	(parser_statement_begin): Avoid unnecessary store_location_stuff() call.
	(gg_get_depending_on_value): Streamline get_depending_on_value_from_odo().
	(depending_on_value): Likewise.
	(parser_display_field): Formatting.
	(parser_display): Handle case ENV_NAME_e.
	(parser_file_open): Avoid unnecessary store_location_stuff.
	(parser_file_close): Likewise.
	(parser_file_read): Likewise.
	(parser_file_write): Likewise.
	(parser_file_delete): Likewise.
	(parser_file_rewrite): Likewise.
	(parser_file_start): Likewise.
	(parser_intrinsic_subst): Streamline get_depending_on_value_from_odo().
	(parser_intrinsic_call_1): Likewise.
	(parser_lsearch_start): Likewise.
	(parser_bsearch_start): Likewise.
	(parser_sort): Likewise.
	(store_location_stuff): Avoid unnecessary assignments.
	(parser_pop_exception): Formatting.
	* genmath.cc (parser_add): Avoid var_decl_default_compute_error assignment
	when doing fast_add().
	(parser_subtract): Likewise.
	* genutil.cc (REFER): Macro for analyzing code generation.
	(get_integer_value): Use data_decl_node for integer value from FldLiteralN.
	(get_data_offset): Streamline exception code processing.
	(get_and_check_refstart_and_reflen): Likewise.
	(get_depending_on_value_from_odo): Likewise.
	(get_depending_on_value): Likewise.
	(refer_is_clean): Formatting.
	(refer_refmod_length): Streamline exception code processing.
	(refer_fill_depends): Likewise.
	(refer_offset): Likewise.
	(refer_size_dest): Likewise.
	(refer_size_source): Likewise.
	* genutil.h (get_depending_on_value_from_odo): Likewise.
	* lang-specs.h: Options definition.
	* lang.opt: -M as in c.opt.
	* lexio.h: Formatting.
	* parse.y: Expand -dialect suggestions; SECTION SEGMENT messages.
	* parse_ante.h (declarative_runtime_match): Dialect handling.
	(labels_dump): Likewise.
	(class current_tokens_t): Likewise.
	(class prog_descr_t): Make program_index size_t to prevent padding bytes.
	* scan.l: POP_FILE directive.
	* scan_ante.h (class enter_leave_t): Better handle line number when
	processing COPY statements.
	* symbols.cc (symbol_elem_cmp): Eliminate SymFunction.
	(symbols_dump): Likewise.
	(symbol_label_section_exists): Likewise.
	* symbols.h (NAME_MAX): Eliminate.  (Was part of SymFunction).
	(dialect_is): Improve dialect handling.
	(dialect_gcc): Likewise.
	(dialect_ibm): Likewise.
	(dialect_gnu): Likewise.
	(enum symbol_type_t): Eliminate SymFunction.
	* util.cc (symbol_type_str): Likewise.
	(class unique_stack): Option -M handling.
	(cobol_set_pp_option): Likewise.
	(parse_file): Likewise.
	* util.h (cobol_set_pp_option): Likewise.

libgcobol/ChangeLog:

	* common-defs.h (struct cbl_declarative_t): Eliminate blobl.
	* libgcobol.cc (__gg__set_env_name): Code for ENVIRONMENT-NAME/VALUE.
	(__gg__set_env_value): Likewise.

gcc/testsuite/ChangeLog:

	* cobol.dg/group1/declarative_1.cob: Handle modified exception handling.

(cherry picked from commit 92b6485a75cabaf64f1f74ba7ab73a5204c9d0aa)