2013-11-06  Vladimir Makarov  <vmakarov@redhat.com>

	* tree-pass.h (make_pass_live_range_shrinkage): New external.
	* timevar.def (TV_LIVE_RANGE_SHRINKAGE): New.
	* sched-rgn.c (gate_handle_live_range_shrinkage): New.
	(rest_of_handle_live_range_shrinkage): Ditto
	(class pass_live_range_shrinkage): Ditto.
	(pass_data_live_range_shrinkage): Ditto.
	(make_pass_live_range_shrinkage): Ditto.
	* sched-int.h (initialize_live_range_shrinkage): New prototype.
	(finish_live_range_shrinkage): Ditto.
	* sched-deps.c (create_insn_reg_set): Make void return value.
	* passes.def: Add pass_live_range_shrinkage.
	* ira.c (update_equiv_regs): Don't move if
	flag_live_range_shrinkage.
	* haifa-sched.c (live_range_shrinkage_p): New.
	(initialize_live_range_shrinkage, finish_live_range_shrinkage):
	New functions.
	(rank_for_schedule): Add code for pressure relief through live
	range shrinkage.
	(schedule_insn): Print more debug info.
	(sched_init): Setup SCHED_PRESSURE_WEIGHTED for pressure relief
	through live range shrinkage.
	* doc/invoke.texi (-flive-range-shrinkage): New.
	* common.opt (flive-range-shrinkage): New.

From-SVN: r204465