On Thu, Oct 27, 2011 at 4:47 PM, Revital Eres <revital.e...@linaro.org> wrote: > Hello, > > The attach patch fixes the current marking of SMS loops to prevent > further scheduling as follows: it marks *all* the loop's bbs with > BB_DISABLE_SCHEDULE which prevents them from been scheduled later. > (with the current implementation if the loop has non empty latch then > it will be considered for scheduling based on > sched_is_disabled_for_current_region_p () in in sched-rgn.c). > It also marks the epilogue and prologue as BB_DISABLE_SCHEDULE which > was shown in my experiments as a good influence on performance as > scheduling those regions after SMS increased register pressure in some > cases. > > Tested and bootstrap on all languages except java (PR50879) on > ppc64-redhat-linux, enabling SMS on loops with SC 1. > > OK for mainline? >
OK, seems reasonable. Please fix typo (in original comment): - scheduling passes doesn't touch it. */ + scheduling passes don't touch it. */ Thanks, Ayal. > Thanks, > Revital > > > Changelog: > > * modulo-sched.c (generate_prolog_epilog): Mark prolog and epilog > as BB_DISABLE_SCHEDULE. > (mark_loop_unsched): New function. > (sms_schedule): Call it. >
