Here is a list of all struct and union fields with links to the structures/unions they belong to:

- o -

• ob : add_to_obstack_info , graph
• obj : ptr_data
• object : internal_ldfile , change_t , free_object , type_change_info , live_range
• object_size : internal_ldfile
• object_size_type : object_size_info
• objects : ira_allocno , object_block
• obstack : output_buffer , ssa_conflicts_d , live_track_d , bitmap_obstack , bitmap_head_def , output_block
• oecode : oecount_s
• of : et_occ
• off : vn_reference_op_struct
• off_p : mem_addr_template
• offmem_ok : operand_alternative
• offset : ipcp_value_source , constant_descriptor_rtx , ipcp_agg_lattice , agg_position_info , condition , type_change_info , ipa_known_agg_contents_list , ipa_known_type_data , ipa_ancestor_jf_data , ipa_agg_jf_item , ipa_agg_replacement_value , ipa_parm_adjustment , elim_table , lra_reg , mem_attrs , reg_attrs , block_symbol , cgraph_indirect_call_info , subreg_info , affine_tree_combination , cfa_loc , innermost_loop_behavior , dref_d , action_record , access , mem_address , move_by_pieces_d , ao_ref_s , name_to_bb , store_by_pieces_d , stridxlist , variable_info , locate_and_pad_arg_data , constraint_expr , fieldoff , gcov_var , attrs_def , variable_part_def::variable_aux , mmap_info , addr_const , rtx_constant_pool
• offset_known_p : mem_attrs
• offset_map_n : group_info
• offset_map_p : group_info
• offset_map_size_n : group_info
• offset_map_size_p : group_info
• offset_unsigned : addr_diff_vec_flags
• offsets : stdarg_info , vtable_registration
• ok_for_sibcall : lang_hooks_for_decls
• old : change_t
• old_code : change_t
• old_contents : undo
• old_cp : iv_ca_delta
• old_die : skeleton_chain_struct
• old_expr_vinsn : expr_history_def_1
• old_len : debug_prefix_map
• old_name : lto_renaming_slot , rename_map_elt_s
• old_node : create_version_alias_info
• old_original_insns : cmpd_local_params
• old_prefix : debug_prefix_map
• old_pressure : bb_data
• old_queue : model_insn_info
• old_reg : ps_reg_move_info
• old_tree : ipa_replace_map
• oldest_regno : value_data_entry
• oldsolution : variable_info
• omit_relative : spec_path_info
• omp_clause_assign_op : lang_hooks_for_decls
• omp_clause_copy_ctor : lang_hooks_for_decls
• omp_clause_default_ctor : lang_hooks_for_decls
• omp_clause_dtor : lang_hooks_for_decls
• omp_cost : eni_weights_d
• omp_disregard_value_expr : lang_hooks_for_decls
• omp_finish_clause : lang_hooks_for_decls
• omp_firstprivatize_type_sizes : lang_hooks_for_types
• omp_mappable_type : lang_hooks_for_types
• omp_predetermined_sharing : lang_hooks_for_decls
• omp_private_debug_clause : lang_hooks_for_decls
• omp_private_outer_ref : lang_hooks_for_decls
• omp_privatize_by_reference : lang_hooks_for_decls
• omp_report_decl : lang_hooks_for_decls
• on_enter : code_motion_path_driver_info_def
• on_sccstack : vn_ssa_aux
• on_stack : assign_parm_data_one , ipcp_value , ipa_dfs_info
• on_tree : arc_info , edge_info
• oneof : regexp
• onepaux : variable_part_def::variable_aux
• only_called_at_exit : cgraph_node , ipa_propagate_frequency_data
• only_called_at_startup : cgraph_node , ipa_propagate_frequency_data
• only_restrict_pointers : variable_info , fieldoff
• only_vars : record_reference_ctx
• op : gimple_statement_call , gimple_statement_asm , libfunc_entry , var_to_expand , simplify_plus_minus_op_data , chain , hashable_expr , operand_entry , oecount_s , inter_bb_range_test_entry , vn_nary_op_s , algorithm , optab_def_d , pattern_d , gimple_statement_with_ops , gimple_statement_with_memory_ops
• op0 : separate_ops , vn_reference_op_struct
• op1 : separate_ops , vn_reference_op_struct
• op2 : separate_ops , vn_reference_op_struct
• op_count : extraction
• op_info : insn_rr_info
• op_p : iv_use
• opaque : lto_compression_stream
• opcode : dw_line_info_struct , vn_reference_op_struct
• open_chains_set : bb_rename_info
• operand : data , ipa_pass_through_data , lra_static_insn_data , recog_data_d , insn_data_d
• operand_alternative : lra_static_insn_data
• operand_loc : lra_insn_recog_data , recog_data_d
• operand_memory : ssa_operands
• operand_memory_index : ssa_operands
• operand_mode : recog_data_d
• operand_num : condition
• operand_number : data
• operand_type : recog_data_d
• operands : tree_exp , vn_reference_s
• operands_swapped : _loop_vec_info
• operation : ipa_pass_through_data
• operator new() : gcc::pass_manager
• operator vec< T, A, L >() : vnull
• operator!=() : double_int , hash_table< Descriptor, Allocator >::iterator , vec< T, va_heap, vl_ptr >
• operator&() : double_int
• operator&=() : double_int
• operator()() : insn_gen_fn , rewrite_mem_ref_loc , first_mem_ref_loc_1 , sm_set_flag_if_changed , ref_always_accessed
• operator*() : hash_table< Descriptor, Allocator >::iterator , double_int , insn_gen_fn
• operator*=() : double_int
• operator+() : double_int
• operator++() : double_int , hash_table< Descriptor, Allocator >::iterator
• operator+=() : double_int
• operator-() : double_int
• operator--() : double_int
• operator-=() : double_int
• operator==() : double_int , vec< T, va_heap, vl_ptr >
• operator[]() : vec< T, va_heap, vl_ptr > , vec< T, A, vl_embed > , vec< T, va_heap, vl_ptr >
• operator^() : double_int
• operator^=() : double_int
• operator|() : double_int
• operator|=() : double_int
• operator~() : double_int
• oplocs : extraction , accum_extract
• opnd : hashable_expr
• opnd0 : hashable_expr
• opnd1 : hashable_expr
• opnd2 : hashable_expr
• opno : decision_test
• opnum : reload
• ops : algorithm , hashable_expr
• ops_active : ssa_operands
• opt : type , hw_doloop_hooks , pair
• opt0 : option_map
• opt1 : option_map
• opt_index : cl_deferred_option , cl_decoded_option
• opt_info_enable_passes() : gcc::dump_manager
• opt_len : cl_option
• opt_pass() : opt_pass
• opt_permissive : diagnostic_context
• opt_text : cl_option
• optabs : target_globals
• optgroup_flags : dump_file_info
• optinfo_flags : pass_data
• option : diagnostic_classification_change_t , param_info , spec_path_info
• option_enabled : diagnostic_context
• option_index : diagnostic_info
• option_lang_mask : lang_hooks
• option_name : diagnostic_context
• option_state : diagnostic_context
• optional : reload
• optional_p : dataflow
• order : symtab_node_base , asm_node , topo_info , page_entry
• order_pos : searchc_env
• order_state_num : state
• ordered_remove() : vec< T, va_heap, vl_ptr > , vec< T, A, vl_embed >
• ordering : switchstr
• orig : decl_table_entry , dep_replacement
• orig_bb_index : _expr
• orig_block : move_stmt_d
• orig_expr_found : code_motion_path_driver_info_def
• orig_expr_not_found : code_motion_path_driver_info_def
• orig_fnargs : assign_parm_data_all
• orig_insn : _def
• orig_loop : fmt_data
• orig_mode : comparison
• orig_option_with_args_text : cl_decoded_option
• orig_pat : _haifa_insn_data
• orig_pressure : model_pressure_limit
• orig_reg : reg_saved_in_data_struct
• orig_regno : invariant
• orig_sched_cycle : _expr
• orig_var : iv_to_split
• origin : cgraph_node
• original_insns : fur_static_params
• original_schedule : scop
• original_transaction_was_outer : tm_region
• originators : _sel_insn_data
• os_multilib : prefix_list
• other : funny_match , eh_status::eh_status_u
• other_btr_uses_after_use : btr_def_s
• other_btr_uses_before_def : btr_def_s
• other_count : switch_conv_info
• other_insn : undobuf
• other_use_this_block : btr_user_s
• otr_token : cgraph_indirect_call_info , polymorphic_call_target_d
• otr_type : cgraph_indirect_call_info
• out : ddg_node , df_lr_problem_data , reload , df_lr_bb_info , df_word_lr_bb_info , bb_info , df_live_bb_info , df_live_problem_data , variable_tracking_info_def , df_rd_bb_info , df_md_bb_info
• out_edge : niter_desc
• out_insn_reserv : bypass_decl
• out_of_date_transfer_functions : dataflow
• out_pattern : bypass_decl
• out_reg : reload
• out_reg_set : block_info_def
• outer : tm_region , eh_region_d , nesting_info , leh_tf_state , omp_region , omp_context , address_info
• outer_context : gimplify_omp_ctx
• outermost_exit : loop_data
• outgoing : parm_reg
• outgoing_args_size : rtl_data
• outlining_inline_function : gcc_debug_hooks
• outmode : reload
• output : insn_data_d , varpool_node , insn_data_d
• output_buffer() : output_buffer
• output_format : data , insn_data_d
• output_location : streamer_hooks
• outside_cost : _vect_peel_extended_info
• overall : loop_size
• overall_size : stack_entry
• overall_time : stack_entry
• overhead : loc_descriptor
• overread : gcov_var
• override_column : diagnostic_info
• own_end : btr_def_s