not hoisting loads/stores

[Jeffrey A Law]

  In message < 199912161702.aa06208@gremlin-relay.ics.uci.edu >you write:
  > Is there any chance for the loop optimizer to hoist whatever insns are
  > there and that will later become those memory references) at the time
  > it is run? 
No. The insn that starts the loop is not an invariant.  Invariant pieces only
show up during reload.

  > Is this a problem with the loop optimizer? 
No.

jeff