(added_links_insn): New variable.

(distribute_links): Set it.
(if_then_else_cond): New function.
(try_combine): Return added_links_insn if it is earlier than what we would
otherwise return.
(subst): Generalize (OP X Y) to call if_then_else_cond instead of only
checking for an explicit IF_THEN_ELSE.
(subst, case IF_THEN_ELSE): When converting to a MULT, simplify the MULT
before putting it into OP.
(subst, case AND): Don't make IF_THEN_ELSE here; now made in generic case
earlier.

From-SVN: r6343