Merge pull request !3212 from anzhengqi/epochs-ready

Merge pull request !3162 from lianliguang/split-tuple-node-to-make-tuple

Merge pull request !3177 from Giancarlo/pm_arithmetic_simplify

Merge pull request !3198 from yanghaoran/code_sync_0718

Merge pull request !3209 from liuxiao93/AddN

Merge pull request !3200 from vlne-v1/remove_loop_can_unroll

Merge pull request !3194 from YuJianfeng/concat

Merge pull request !3208 from vlne-v1/attribute_error_for_pybind

Merge pull request !3166 from qujianwei/gpu-oneslike

Merge pull request !3195 from yuchaojie/transformer_st

Merge pull request !3151 from liuxiao93/fix-BatchNorm2d

Merge pull request !3147 from yanzhenxiang2020/add_rnnt_cate_open.new

Merge pull request !3133 from liyong126/md_num_of_samples

Merge pull request !3114 from riemann_penn/coo_tensor

Merge pull request !3102 from nhussain/random_crop_fixes

Merge pull request !3115 from YuJianfeng/master

Merge pull request !3098 from wangnan39/sparse_optimizer_adapter_indexedslice

Merge pull request !3135 from VectorSL/cast2

Merge pull request !3080 from vlne-v1/remove-redundant-phi

Merge pull request !3130 from vlne-v1/quant_op_depthwise

Merge pull request !3152 from yao_yf/reshape_ut_remove

Merge pull request !2989 from kisnwang/two-step-reduce-sparse-gradient

Merge pull request !2973 from luoyang/update

Merge pull request !2876 from lirongzhen1/master

Merge pull request !3131 from zhangbuxue/change_shape_and_dtype_of_tensor_from_interface_to_attr