https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109351
--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by hongtao Liu <liuho...@gcc.gnu.org>: https://gcc.gnu.org/g:727be65ec40e119a7c864bfaa5d6a73547863c06 commit r14-57-g727be65ec40e119a7c864bfaa5d6a73547863c06 Author: liuhongt <hongtao....@intel.com> Date: Mon Apr 3 10:54:55 2023 +0800 Check hard_regno_mode_ok before setting lowest memory move cost for the mode with different reg classes. There's a potential performance issue when backend returns some unreasonable value for the mode which can be never be allocate with reg class. gcc/ChangeLog: PR rtl-optimization/109351 * ira.cc (setup_class_subset_and_memory_move_costs): Check hard_regno_mode_ok before setting lowest memory move cost for the mode with different reg classes.
