http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60438
--- Comment #26 from linzj <manjian2006 at gmail dot com> --- (In reply to Jakub Jelinek from comment #25) > Perhaps we can handle some most common cases of frame related insns (e.g. if > both have REG_CFA_ADJUST_CFA notes, etc.), perhaps it would be worth it to > run a bootstrap which would log when the above hunk prevented some merging > and append both insns to some /tmp/ file across whole bootstrap, then we > could see what is common enough to care about. Hi,Jakub,I remove the hunk, because I want some merging happen,not prevent it from.
