2008-11-15 Vladimir Makarov <vmakarov@redhat.com>

2008-11-15  Vladimir Makarov  <vmakarov@redhat.com>

	PR bootstrap/37790
	* ira-int.h (ira_copy_allocno_live_range_list,
	ira_merge_allocno_live_ranges,
	ira_allocno_live_ranges_intersect_p,
	ira_finish_allocno_live_range_list): New prototypes.
	(ira_allocno_live_ranges_intersect_p,
	ira_pseudo_live_ranges_intersect_p): Remove.

	* ira-conflicts.c (ira_allocno_live_ranges_intersect_p,
	ira_pseudo_live_ranges_intersect_p): Rename to
	allocnos_have_intersected_live_ranges_p and
	pseudos_have_intersected_live_ranges_p.  Move them from here to
	...

	* ira-color.c: ... here
	(coalesced_allocno_conflict_p): Use
	allocnos_have_intersected_live_ranges_p.
	(coalesced_allocnos_living_at_program_points,
	coalesced_allocnos_live_at_points_p,
	set_coalesced_allocnos_live_points): Remove.
	(slot_coalesced_allocnos_live_ranges,
	slot_coalesced_allocno_live_ranges_intersect_p,
	setup_slot_coalesced_allocno_live_ranges): New.
	(coalesce_spill_slots): Use ranges of coalesced allocnos.
	(ira_sort_regnos_for_alter_reg): Use
	allocnos_have_intersected_live_ranges_p.
	(ira_reuse_stack_slot): Use
	pseudos_have_intersected_live_ranges_p.

	* global.c (pseudo_for_reload_consideration_p): Check
	flag_ira_share_spill_slots too.

	* ira-build.c (copy_allocno_live_range_list): Rename to
	ira_copy_allocno_live_range_list.  Make it external.
	(merge_ranges): Rename to ira_merge_allocno_live_ranges.  Make it
	external.
	(ira_allocno_live_ranges_intersect_p): New.
	(ira_finish_allocno_live_range_list): New.
	(finish_allocno): Use it.
	(remove_unnecessary_allocnos): Use ira_merge_allocno_live_ranges.
	(copy_info_to_removed_store_destinations): Ditto.  Use
	ira_copy_allocno_live_range_list.
	(ira_flattening): Use ira_merge_allocno_live_ranges.

	* ira.c (too_high_register_pressure_p): New function.
	(ira): Switch off sharing spill slots if the pressure is too high.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@142017 138bc75d-0d04-0410-961f-82ee72b054a4