message: A note about reassemble
diff: @@ -102,6 +102,9 @@ def insert_phis(blocks, phi_args, phi_dests, types):
  def reassemble(blocks):
  + """Flatten a CFG into an instruction list."""
  + # This could optimize slightly by opportunistically eliminating
  + # `jmp .next` and `ret` terminators where it is allowed.
  instrs = []
  for name, block in blocks.items():
  instrs.append({'label': name})
  