Merge debug-early branch into mainline.

	* dwarf2out.c: Remove deferred_locations*.
	(dwarf2_debug_hooks): Add early_finish hook.
	Remove global_decl hook.
	Add early_global_decl and late_global_decl hook.
	New global early_dwarf.
	New structure set_early_dwarf.
	(output_die): Indicate whether a DIE was generated early
	when generating assembly with -dA.
	(struct limbo_die_struct): Document created_for field.
	Remove file_table_last_lookup.
	(remove_AT): Return TRUE if successful.
	(remove_child_TAG): Clear die_parent.
	(reparent_child): New function abstracted from...
	(splice_child_die): ...here.
	(new_die): ICE if a DIE ends up in limbo too late.
	(check_die): New.
	(defer_location): Remove.
	(add_subscript_info): Reuse DW_TAG_subrange_type if available.
	(fill_variable_array_bounds): New.
	(decl_start_label): Call fill_variable_array_bounds.
	(gen_formal_parameter_die): Rewrite to reuse previously generated
	DIEs.
	(gen_subprogram_die): Same.
	(gen_variable_die): Same.
	(gen_const_die): Same.
	(gen_label_die): Same.
	(gen_lexical_block_die): Same.
	(decl_will_get_specification_p): New.
	(local_function_static): New.
	(gen_struct_or_union_type_die): Fill in variable-length fields.
	(gen_typedef_die): Fill in variable-length typedefs.
	(gen_tagged_type_die): Gracefully return on error_mark_node.
	Handle re-entrancy.
	(gen_type_die_with_usage): Handle variable-length types.
	Remove duplicate code for ARRAY_TYPE case.
	(process_scope_var): Only process imported modules during early
	dwarf.
	(dwarf2out_early_global_decl): New.
	(dwarf2out_late_global_decl): Rename from dwarf2out_global_decl.
	(dwarf2out_type_decl): Set early_dwarf while calling
	dwarf2out_decl.
	(dwarf2out_decl): Verify that we did not recreate a previously
	generated DIE.
	Do not return on DECL_EXTERNALs in VAR_DECLs.
	Abstract some code to local_function_static.
	(lookup_filename): Remove use of file_table_last_lookup.
	Gracefully exit on missing file_name.
	(dwarf2out_finish): Verify limbo list.
	Remove deferred_locations_list use.
	Move deferred_asm_name and limbo flushing to...
	(dwarf2out_early_finish): ...here.  New.
	(dwarf2out_c_finalize): Remove set of deferred_location_list,
	deferred_asm_name, and file_table_last_lookup.
	* cgraph.h (referred_to_p): Add default argument.
	* cgraphunit.c (referred_to_p): Add and handle include_self
	argument.
	(analyze_functions): Add first_time argument.
	Call check_global_declaration for all symbols.
	Call late_global_decl for nodes for moribund nodes.
	(finalize_compilation_unit): Add new argument to
	analyze_functions.
	Call early_global_decl for functions.
	Call early_finish debug hook.
	* dbxout.c (dbxout_early_global_decl): New.
	(dbxout_late_global_decl): New.  Adapted from dbxout_global_decl.
	(dbx_debug_hooks): Add new hooks.
	(xcoff_debug_hooks): Same.
	* debug.c (do_nothing_debug_hooks): Add early_finish field.
	Add early and late debug hooks.
	Remove global_decl hook.
	* debug.h (struct gcc_debug_hooks): Add early_finish,
	early_global_decl, and late_global_decl fields.
	Remove global_decl field.
	Document gcc_debug_hooks.
	* gengtype.c (output_typename): Remove.
	* godump.c (go_early_global_decl): New.
	(go_late_global_decl): New.
	(go_global_decl): Remove.
	(dump_go_spec_init): Remove global_decl.  Add
	{early,late}_global_decl.
	* langhooks-def.h (LANG_HOOKS_WRITE_GLOBALS): Remove.
	(LANG_HOOKS_POST_COMPILATION_PARSING_CLEANUPS): New.
	* langhooks.c (lhd_warn_unused_global_decl): Adjust comment.
	(write_global_declarations): Remove.
	(global_decl_processing): New.
	* langhooks.h (struct lang_hooks_for_decls): Remove
	final_write_globals field.
	Add post_compilation_parsing_cleanups field.
	* passes.c (rest_of_decl_compilation): Call early_global_decl.
	* sdbout.c: Add early and late_global_decl hooks.  Remove
	sdbout_global_decl hook.
	Add early_finish field for sdb_debug_hooks.
	(sdbout_global_decl): Remove.
	(sdbout_early_global_decl): New.
	(sdbout_late_global_decl): New.
	* timevar.def (TV_PHASE_LATE_PARSING_CLEANUPS): New.
	* toplev.c (check_global_declaration): Rename from
	check_global_declaration_1.
	Adapt to use symtab infrastructure.
	(check_global_declarations): Remove.
	(emit_debug_global_declarations): Remove.
	(compile_file): Remove call to final_write_globals langhook.
	Run the actual compilation process.
	Perform any post compilation parser cleanups.
	Generate late debug info.
	* toplev.h (check_global_declaration): New.
	(check_global_declaration_1): Remove.
	(check_global_declarations): Remove.
	(write_global_declarations): Remove.
	(emit_debug_global_declarations): Remove.
	(global_decl_processing): New.
	* tree-core.h (struct tree_block): Add DIE field.
	* tree.h (BLOCK_DIE): New.
	* vmsdbgout.c (vmsdbgout_global_decl): Remove function and its use
	throughout.
	(vmsdbgout_early_global_decl): New.
	(vmsdbgout_late_global_decl): New.
	Add early_finish debug hook field to vmsdbg_debug_hooks.
	Remove vmsdbgout_decl to vmsdbgout_function_decl.
	Add early and late_global_decl debug hooks.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@224161 138bc75d-0d04-0410-961f-82ee72b054a4

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