Tom Tromey  <tromey@redhat.com>

	PR symtab/8421:
	* coffread.c (coff_register_index): New global.
	(process_coff_symbol, coff_read_enum_type): Set
	SYMBOL_ACLASS_INDEX.
	(_initialize_coffread): Initialize new global.
	* dwarf2loc.c (locexpr_find_frame_base_location)
	(dwarf2_block_frame_base_locexpr_funcs)
	(loclist_find_frame_base_location)
	(dwarf2_block_frame_base_loclist_funcs): New.
	(dwarf_expr_frame_base_1): Call SYMBOL_BLOCK_OPS, remove internal_error.
	(dwarf2_locexpr_funcs, dwarf2_loclist_funcs): Add location_has_loclist.
	* dwarf2loc.h (dwarf2_block_frame_base_locexpr_funcs)
	(dwarf2_block_frame_base_loclist_funcs): New.
	* dwarf2read.c (dwarf2_locexpr_index, dwarf2_loclist_index)
	(dwarf2_locexpr_block_index, dwarf2_loclist_block_index): New
	globals.
	(read_func_scope): Update.
	(fixup_go_packaging, mark_common_block_symbol_computed)
	(var_decode_location, new_symbol_full, dwarf2_const_value):
	Set SYMBOL_ACLASS_INDEX.
	(dwarf2_symbol_mark_computed): Likewise.  Add 'is_block' argument.
	(_initialize_dwarf2_read): Initialize new globals.
	* jit.c (finalize_symtab): Set SYMBOL_ACLASS_INDEX.
	* jv-lang.c (add_class_symbol): Set SYMBOL_ACLASS_INDEX.
	* mdebugread.c (mdebug_register_index, mdebug_regparm_index): New
	globals.
	(parse_symbol, psymtab_to_symtab_1): Set SYMBOL_ACLASS_INDEX.
	(_initialize_mdebugread): Initialize new globals.
	* psympriv.h (struct partial_symbol) <aclass>: Update comment.
	* stabsread.c (patch_block_stabs): Set SYMBOL_ACLASS_INDEX.
	(stab_register_index, stab_regparm_index): New globals.
	(define_symbol, read_enum_type, common_block_end): Set
	SYMBOL_ACLASS_INDEX.
	(_initialize_stabsread): Initialize new globals.
	* symtab.c (next_aclass_value, symbol_impl, symbol_impls): New
	globals.
	(MAX_SYMBOL_IMPLS): New define.
	(register_symbol_computed_impl, register_symbol_block_impl)
	(register_symbol_register_impl)
	(initialize_ordinary_address_classes): New functions.
	(_initialize_symtab): Call initialize_ordinary_address_classes.
	* symtab.h (enum address_class) <LOC_FINAL_VALUE>: New constant.
	(struct symbol_impl): New.
	(SYMBOL_ACLASS_BITS): New define.
	(struct symbol) <aclass, ops>: Remove fields.
	<aclass_index>: New field.
	(symbol_impls): Declare.
	(SYMBOL_CLASS, SYMBOL_COMPUTED_OPS, SYMBOL_REGISTER_OPS): Redefine.
	(SYMBOL_IMPL, SYMBOL_ACLASS_INDEX): New defines.
	(register_symbol_computed_impl, register_symbol_block_impl)
	(register_symbol_register_impl): Declare.
	(struct symbol_computed_ops): Add location_has_loclist.
	(struct symbol_block_ops): New.
	(SYMBOL_BLOCK_OPS): New.
	* xcoffread.c (process_xcoff_symbol): Set SYMBOL_ACLASS_INDEX.