5aea404159
suppress a hint on undefined imported name to make it backwards compatible. Bug: Change-Id: I9c92adcf685248fb8aae9da39c008968768ad29b Reviewed-on: https://dart-review.googlesource.com/33662 Reviewed-by: Paul Berry <paulberry@google.com>
Conversion to a textual format.
The text format is currently very ad-hoc and there is no conversion back, but it's a pleasant way to view the IR.