https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94516
--- Comment #13 from Jakub Jelinek <jakub at gcc dot gnu.org> --- I've gathered statistics across x86_64-linux and i686-linux bootstraps/regtests in postreload.c (reload_cse_simplify_set) when sp = sp + const_int is replaced with sp = reg, once with the recent cselib.c/var-tracking.c changes reverted and once with vanilla trunk. It triggered on -m32 / -m64 code with old cselib.c 1559 / 68 times and with new cselib.c 8476 / 453 times. So, it was happening before too and I'll try to check some cases if it also doesn't prevent csa, but now happens 5-7 times more often.
