https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95252
Kito Cheng <kito.cheng at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |kito.cheng at gmail dot com --- Comment #8 from Kito Cheng <kito.cheng at gmail dot com> --- It seems like because register rename thought all callee-saved register can be used, because df_regs_ever_live_p return true for all callee-saved register now, so seems like we really need an exact pattern to describe that, that's put into my tomorrows TODO list.