Summary: looks like we don't a good job with initial recurrent input gradients yet. Here is some fix, but gradient doesn't check yet. The shape is correct now though
Reviewed By: salexspb
Differential Revision: D4475447
fbshipit-source-id: 280f1f59f19e487fd0dce0d440609c50ddce294a
Summary: Fixes segfaults that occur in Eigen and im2col/sgemm backends.
Reviewed By: Yangqing
Differential Revision: D4451772
fbshipit-source-id: 3cf21e5afb2fe300db4228933a82063db5f7091f
Summary:
lets have a test for this so we don't break existing usecases
while iterating over RecurrentOp's code
Reviewed By: urikz
Differential Revision: D4456404
fbshipit-source-id: 79f2b88c1eed16106adf5b793b4c74441c7146c6