You can always use a goto statement, like

while (foo()) {
  ...
  goto JUST_BEFORE_END_OF_LOOP if bar();
  ...
  ...
JUST_BEFORE_OF_LOOP:
  clean_up
}
[download]

You might also checkout the continue flow control. With it, you could write it like:

while (foo()) {
  ...
  next if bar();
  ...
  ...
} continue {
  clean_up
}
[download]