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

- u -

• u : allocation_object_def , cgraph_order_sort , block_info , decision_test , max_alignment , line_info , gimple_statement_call , rtx_def , eh_region_d , attr_hash , _list_node , tree_base , type , pre_expr_d , micro_operation_def
• ub : input_domain
• ucmp() : double_int
• udiv : init_expmed_rtl , double_int
• udivmod() : double_int
• uexp : real_value
• ugt() : double_int
• uid : cgraph_node , cgraph_edge , cselib_val_struct , gimple_statement_base , target_info , expr_history_def_1 , int_tree_map , tm_alias_pair , vtbl_map_node
• ule() : double_int
• ult() : double_int
• umax() : double_int
• umin() : double_int
• umod() : double_int
• unaligned_dr : _loop_vec_info
• unary : hashable_expr
• unchanging : rtx_def
• unconstrained_base : indices
• uncprop_dom_walker() : uncprop_dom_walker
• undef : gcc_debug_hooks
• undos : undobuf
• unexceptional : line_info
• unified_vars_dynamic : constraint_stats
• unified_vars_static : constraint_stats
• uniq : switch_conv_info
• unique : temp_name
• unique_name : symtab_node_base , pass_registry
• unique_num : state
• unit : decl , regexp
• unit_decl : unit_regexp , unit_set_el , unit_usage
• unit_decls : pattern_set_el
• unit_is_used : unit_decl
• unit_num : unit_decl
• units_num : description , pattern_set_el
• unknown_error : cl_enum
• unknown_option_callback : cl_option_handlers
• unnamed : section
• unordered_remove() : vec< T, A, vl_embed > , vec< T, va_heap, vl_ptr >
• unrolling_factor : _slp_instance
• unshare : change_t
• unsigned_flag : tree_base
• unsigned_p : expand_operand
• unsignedp : arg_data
• unusable : incoming_reg_info
• unused : nothing_regexp , ggc_statistics , expand_operand
• up : bounds
• update_cost_records : allocno_color_data
• update_label_nuses : replace_label_data
• updated_class_cost : ira_allocno
• updated_conflict_hard_reg_costs : ira_allocno
• updated_hard_reg_costs : ira_allocno
• updated_memory_cost : ira_allocno
• upper_bound : array_descr_info::array_descr_dimen
• upto : iv_ca
• use : df_word_lr_bb_info , btr_user_s , df_lr_bb_info , ssa_use_operand_d , iv_ca_delta , dead_debug_use
• use_cxa_end_cleanup : eh_region_d
• use_id : iv
• use_info : df_d
• use_ops : gimple_statement_with_ops_base
• use_processed : vn_ssa_aux
• use_ptr : use_optype_d
• use_regs : df_d
• use_vec : df_collection_rec
• used : timevar_def , label_record , dead_debug_global , rtx_def , dead_debug_local , ipa_param_descriptor
• used_as_abstract_origin : cgraph_node
• used_files : file_name_acquire_data
• used_flag : tree_base
• used_from_other_partition : symtab_node_base
• used_insn_alternative : lra_insn_recog_data
• used_inv_expr : iv_ca
• used_p : allocno_hard_regs_node
• used_ssa_names : stack_entry
• used_types_hash : function
• usefulness : _expr
• usep : reg_use
• user : timevar_time_def
• user_align : tree_base
• user_data : callback_info
• user_p : spec_list
• users_this_bb : defs_uses_info
• uses : def , ssa_operand_iterator_d , comparison , btr_def_s , df_insn_info
• uses_analysis_done : ipa_node_params
• uses_const_pool : rtl_data
• uses_eh_lsda : rtl_data , dw_fde_struct
• uses_only_leaf_regs : rtl_data
• uses_pic_offset_table : rtl_data
• using_auto_storage() : vec< T, va_heap, vl_ptr >