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From "Junru Shao (JIRA)" <>
Subject [jira] [Created] (MXNET-1352) Allow dynamic shape in while_loop and if conditionals
Date Mon, 11 Mar 2019 21:35:00 GMT
Junru Shao created MXNET-1352:

             Summary: Allow dynamic shape in while_loop and if conditionals
                 Key: MXNET-1352
             Project: Apache MXNet
          Issue Type: Improvement
            Reporter: Junru Shao

## Description ##
This PR introduces dynamic shape in `contrib.while_loop` and `contrib.cond` to accept dynamically
shaped states.

TODO: working on allowing while_loops to have outputs again.

## Checklist ##
### Essentials ###
Please feel free to remove inapplicable items for your PR.
- [x] The PR title starts with [MXNET-$JIRA_ID], where $JIRA_ID refers to the relevant [JIRA
issue]( created (except PRs with tiny
- [x] Changes are complete (i.e. I finished coding on this PR)
- [x] All changes have test coverage:
- Unit tests are added for small changes to verify correctness (e.g. adding a new operator)
- Nightly tests are added for complicated/long-running ones (e.g. changing distributed kvstore)
- Build tests will be added for build configuration changes (e.g. adding a new build option
with NCCL)
- [x] Code is well-documented: 
- For user-facing API changes, API doc string has been updated. 
- For new C++ functions in header files, their functionalities and arguments are documented.

- For new examples, is added to explain the what the example does, the source of
the dataset, expected performance on test set and reference to the original paper if applicable
- Check the API doc at$PR_ID/$BUILD_ID/index.html
- [x] To the my best knowledge, examples are either not affected by this change, or have been
fixed to be compatible with this change

### Changes ###
- [x] Remove shape inference for while and cond.

## Comments ##
- CC: @szha

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