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gcc/ PR rtl-optimization/63340 (part 1) * ira-costs.c (all_cost_classes): New variable. (complete_cost_classes): New function, split out from... (setup_cost_classes): ...here. (initiate_regno_cost_classes): Set up all_cost_classes. (restrict_cost_classes): New function. (setup_regno_cost_classes_by_aclass): Restrict the cost classes to registers that are valid for the register's mode. (setup_regno_cost_classes_by_mode): Model the mode cache as a restriction of all_cost_classes to a particular mode. (print_allocno_costs): Remove contains_reg_of_mode check. (print_pseudo_costs, find_costs_and_classes): Likewise. From-SVN: r216828
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