The `costs' struct records the cost of using hard registers of each class considered for the calculation and of using memory for each allocno or pseudo.
Referenced by calculate_equiv_gains(), expmed_op_cost_ptr(), ira_adjust_equiv_reg_cost(), ira_tune_allocno_costs(), print_allocno_costs(), print_pseudo_costs(), process_bb_node_for_hard_reg_moves(), record_address_regs(), record_operand_costs(), record_reg_classes(), and scan_one_insn().
Referenced by find_costs_and_classes(), print_allocno_costs(), print_pseudo_costs(), record_address_regs(), record_reg_classes(), and scan_one_insn().