Cleanup the use of `maybe_uextend` in the x64 lowerings
Use maybe_uextend for the brnz lowerings on x64.
(jmp_cond (CC.Z) taken not_taken))))
-(rule 2 (lower_branch (brnz (icmp cc a b) _) (two_targets taken not_taken))
+(rule 2 (lower_branch (brnz (maybe_uextend (icmp cc a b)) _) (two_targets taken not_taken))
(emit_side_effect (jmp_cond_icmp (emit_cmp cc a b) taken not_taken)))
-(rule 2 (lower_branch (brnz (fcmp cc a b) _) (two_targets taken not_taken))
- (let ((cmp FcmpCondResult (emit_fcmp cc a b)))
- (emit_side_effect (jmp_cond_fcmp cmp taken not_taken))))
-
-(rule 2 (lower_branch (brnz (uextend (icmp cc a b)) _) (two_targets taken not_taken))
- (emit_side_effect (jmp_cond_icmp (emit_cmp cc a b) taken not_taken)))
-
-(rule 2 (lower_branch (brnz (uextend (fcmp cc a b)) _) (two_targets taken not_taken))
+(rule 2 (lower_branch (brnz (maybe_uextend (fcmp cc a b)) _) (two_targets taken not_taken))
(let ((cmp FcmpCondResult (emit_fcmp cc a b)))
(emit_side_effect (jmp_cond_fcmp cmp taken not_taken))))
