On Sat, Sep 29, 2012 at 10:26 PM, Steven Bosscher <[email protected]> wrote:
> LRA create live ranges : 175.30 (15%) usr 2.14 (13%) sys 177.44
> (15%) wall 2761 kB ( 0%) ggc
I've tried to split this up a bit more:
process_bb_lives ~50%
create_start_finish_chains ~25%
remove_some_program_points_and_update_live_ranges ~25%
The latter two have a common structure with loops that look like this:
for (i = FIRST_PSEUDO_REGISTER; i < max_regno; i++)
{
for (r = lra_reg_info[i].live_ranges; r != NULL; r = r->next)
Perhaps it's possible to do some of the work of compress_live_ranges
during process_bb_lives, to create shorter live_ranges chains.
Also, maybe doing something else than a linked list of live_ranges
will help (unfortunately that's not a trivial change, it seems,
because the lra_live_range_t type is used everywhere and there are no
iterators or anything abstracted out like that -- just chain
walks...).
Still it does seem to me that a sorted VEC of lra_live_range objects
probably would speed things up. Question is of course how much... :-)
Ciao!
Steven
