re PR middle-end/37448 (cannot compile big function)

re PR middle-end/37448 (cannot compile big function)

2008-09-25  Vladimir Makarov  <vmakarov@redhat.com>

	PR middle-end/37448

	* ira-int.h (IRA_ALLOCNO_TEMP): Rename to ALLOCNO_TEMP.
	(ira_compress_allocno_live_ranges): New prototype.

	* ira-color.c: Rename IRA_ALLOCNO_TEMP to ALLOCNO_TEMP.
	(coalesced_allocnos_living_at_program_points): New.
	(coalesced_allocnos_live_at_points_p,
	set_coalesced_allocnos_live_points): New functions.
	(coalesce_spill_slots): Rewrite.

	* ira-lives.c (remove_some_program_points_and_update_live_ranges,
	ira_compress_allocno_live_ranges): New functions.

	* ira-build.c (ira_flattening): Call
	ira_compress_allocno_live_ranges.
	(ira_build): Ditto.

From-SVN: r140674