Tuesday August 06, 2020 at 7:00am CST

The reason

many depencencies projects are using c++ optimizer now
Buggy and broken when IR version >=4

Plan

Move before 1.9 release
Bug fix (support IR version >= 4 and the bug of fuse bn into conv)
Improve
1. New API
2. Unfold function ops
3. Pattern matching

Action

More details plan (ETA)
The redesigned IR show be thought more

Another thing Remove circle ci