6 PP code if i an int register if i an int but not a
7 (i.e. can't be register (i.e. can be
8 implicitly invalidated) implicitly invalidated)
14 gvsv GV (0xe6078) *i validates i validates i
15 postdec invalidates $i invalidates $i
16 and if_false goto out;
17 i valid; $i invalid i valid; $i invalid
19 i valid; $i invalid i valid; $i invalid
23 entersub validates $i; invals i