tree-ssa-pre.c (alloc_expression_id): Fix use of VEC_reserve.

tree-ssa-pre.c (alloc_expression_id): Fix use of VEC_reserve.

	* tree-ssa-pre.c (alloc_expression_id): Fix use of VEC_reserve.
	* tree-into-ssa.c (get_ssa_name_ann): Likewise.
	(mark_phi_for_rewrite): Likewise.
	(compute_global_livein): Use VEC_reserve outside the innermost
	loop and VEC_quick_push instead of VEC_safe_push in that loop.
	(update_ssa): Re-organize to avoid unnecessary sbitmap_zero'ing
	of new_ssa_names and old_ssa_names.  Allocate phis_to_rewrite to
	the correct initial size.

From-SVN: r190289