* tree-cfg.c (fold_cond_expr_cond): New.
	(make_edges): Call fold_cond_expr_cond.
	(find_taken_edge): Accept nothing but INTEGER_CST.
	(find_taken_edge_cond_expr): Reject INTEGER_CST other than 0
	and 1.
	(find_taken_edge_switch_expr): Remove a check for INTEGER_CST.

From-SVN: r95339