AttributeError: module 'tvm.relay' has no attribute 'ir_pass'

[Learneruestc]

ok… There had a same post…

[Relay] tvm.relay.ir_pass is gone?

Hi after I sync tvm to master version I couldn’t find ir_pass under tvm.relay. I’m also un-able to use function like ir_pass.free_vars or ir_pass.infer_type. However I couldn’t find alternative to replace them from document. Any idea of where should I use to replace those two mentioned functions? Thanks!