re PR rtl-optimization/37397 (IRA performance impact on SPEC CPU 2K/2006)

re PR rtl-optimization/37397 (IRA performance impact on SPEC CPU 2K/2006)

2008-11-14  Vladimir Makarov  <vmakarov@redhat.com>

	PR rtl-optimization/37397
	* ira-int.h (struct ira_allocno): New member bad_spill_p.
	(ALLOCNO_BAD_SPILL_P): New macro.

	* ira-color.c (push_allocnos_to_stack): Check ALLOCNO_BAD_SPILL_P.

	* ira-build.c (ira_create_allocno): Initialize
	ALLOCNO_BAD_SPILL_P.
	(create_cap_allocno, propagate_allocno_info,
	remove_unnecessary_allocnos): Set up or update
	ALLOCNO_BAD_SPILL_P.
	(update_bad_spill_attribute): New function.
	(ira_build): Call it.

	* ira-costs.c (record_reg_classes): Set up ALLOCNO_BAD_SPILL_P.

From-SVN: r141860