2006-11-14 Daniel Berlin <dberlin@dberlin.org>
Fix PR tree-optimization/27755
* tree-ssa-pre.c: Update comments.
(bb_bitmap_sets): Add pa_in and deferred member.
(BB_DEFERRED): New macro.
(maximal_set): New variable.
(pre_stats): Add pa_insert member.
(bitmap_set_and): Short circuit orig == dest.
(bitmap_set_subtract_values): New function.
(bitmap_set_contains_expr): Ditto.
(translate_vuses_through_block): Add phiblock argument.
(dependent_clean): New function.
(compute_antic_aux): Update for maximal_set changes.
(compute_partial_antic_aux): New function.
(compute_antic): Handle partial anticipation.
(do_partial_partial_insertion): New function.
(insert_aux): Handle partial anticipation.
(add_to_sets): Add to maximal set.
(compute_avail): Ditto.
(init_pre): Initialize maximal_set.
(execute_pre): Do partial anticipation if -O3+.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@118821
138bc75d-0d04-0410-961f-
82ee72b054a4