tree-ssa-pre.c (add_to_exp_gen): Adjust.

2012-09-04  Richard Guenther  <rguenther@suse.de>

	* tree-ssa-pre.c (add_to_exp_gen): Adjust.
	(make_values_for_phi): Do not add to PHI_GEN for FRE.
	(compute_avail): Stop processing after adding all defs to
	AVAIL_OUT for FRE.
	(init_pre): Do not allocate not needed bitmap sets for FRE.

From-SVN: r190930