On 30.01.2014 9:42, Andrey Belevantsev wrote:
Hello,
Ping.
As detailed in http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58960#c6, we fail to use the DF liveness info in the register pressure sensitive scheduling for the new blocks as we do not properly compute it in this case. The patch fixes this by avoiding to use the sched-pressure for the new regions, as currently these are only ia64 recovery blocks and supposed to be cold. In the case we'd get other cases of the new blocks, this may be reconsidered. The other options of computing the DF info sketched at the above link do not seem plausible for this stage. Bootstrapped and tested on ia64, also tested by Andreas Schwab on ia64 (see PR log). OK for trunk? Andrey 2013-01-30 Andrey Belevantsev <a...@ispras.ru> PR rtl-optimization/58960 * haifa-sched.c (alloc_global_sched_pressure_data): New, factored out from ... (sched_init) ... here. (free_global_sched_pressure_data): New, factored out from ... (sched_finish): ... here. * sched-int.h (free_global_sched_pressure_data): Declare. * sched-rgn.c (nr_regions_initial): New static global. (haifa_find_rgns): Initialize it. (schedule_region): Disable sched-pressure for the newly generated regions.
