https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67732
--- Comment #3 from Oleg Endo <olegendo at gcc dot gnu.org> --- Hm, those addressing mode issues are supposed to be improved by the AMS pass. But it's not ready yet. Compiling CSiBE with the current AMS branch, without LRA: sum: 3333879 -> 3318319 -15560 / -0.466724 % and teem is again the bigger chunk: total: 1106660 -> 1098296 -8364 / -0.755788 % It seems that the big improvement there comes from better utilization of post-inc/pre-dec and index-mode FP loads/stores. Unfortunately, running AMS + LRA doesn't work, so I can't get any numbers for that ( https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55212#c117 )