RFC: use predicates for RTL objects more

[Andrew Pinski]

On May 9, 2004, at 18:14, Steven Bosscher wrote:
(Interestingly, if JUMP_P and CALL_P are swapped, we produce two
 compare-and-jump instructions instead of the above.  A combine
 wart I suppose?)
Not a combine wart but a fold one.

-Andrew