Konstantin Shcheglov
234c4a7f49
We need this to be able to tree shake outline. https://github.com/dart-lang/sdk/issues/30448#issuecomment-325434406 R=ahe@google.com, kmillikin@google.com, paulberry@google.com, sigmund@google.com BUG= Review-Url: https://codereview.chromium.org/3008763002 .
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.