Remove conditions that are then never true.
Remove functions that are then never called.
Remove variables that are then never read.


Index: gcc/ChangeLog

2013-03-29  Lawrence Crowl  <crowl@google.com>

	* dse.c (clear_alias_sets): Remove never set.
	(disqualified_clear_alias_sets): Remove never set.
	(clear_alias_mode_pool): Remove never set.
	(dse_step0): Remove condition that is never true.
	(canon_address): Remove condition that is never true.
	(dse_step7): Remove condition that is never true.
	(rest_of_handle_dse): Remove condition that is never true.
	(rest_of_handle_dse::did_global): Remove never read from above.
	(dse_step2_spill): Remove never called from above.
	(dse_step5_spill): Remove never called from above.

From-SVN: r197272