Merge pull request !1048 from panyifeng/index_to_switch_case

Merge pull request !1040 from zhangdengcheng/master

Merge pull request !996 from Xiaoda/supporting-virtualdataset-has-three-inputs

Merge pull request !370 from chenweifeng/unsorted_segment_sum

Merge pull request !994 from chenweifeng/broadcast_unequal_dims

Merge pull request !1021 from chenweifeng/broadcast_grad

Merge pull request !1029 from chenweifeng/lstm_ops_check

Merge pull request !948 from chenweifeng/logsoftmax

Merge pull request !991 from chenfei_mindspore/reuse-parameter-by-python-parameter

Merge pull request !1052 from zhangzheng/simple

Merge pull request !713 from 李鸿章/summary_record

Merge pull request !1051 from yao_yf/auto_parallel_reshape_reconstruct

Merge pull request !864 from sunsuodong/cpu_op_register

Merge pull request !1028 from Chong/memctl

Merge pull request !1049 from liubuyu/master

Merge pull request !772 from caifubi/feature-profiling-report-data

Merge pull request !1032 from SanjayChan/bug_fix

Merge pull request !1033 from chujinjin/fix_addn_in_pynative_mode

Merge pull request !1023 from lichen/add_gatherv2_distributed_op

Merge pull request !920 from wsc/lossscale_script

Merge pull request !906 from yangyongjie/master

only reuse parameter from tensor when different session

Merge pull request !1043 from zhangzheng/simple

Merge pull request !1013 from YuJianfeng/master

Merge pull request !1036 from zhaozhenlong/fix-issue-assignsub

Merge pull request !977 from yao_yf/reshape_auto_parallel_strategy_search

Merge pull request !1037 from limingqi107/master

Merge pull request !1031 from amongo/ValueTupleOfNestedGraph

Merge pull request !1024 from jiangjinsheng/nn_example

Merge pull request !1003 from caojian05/mindspore_master_bugfix

Merge pull request !1025 from xulei/filter_op

Merge pull request !1016 from gengdongjie/master

Merge pull request !1001 from zhaozhenlong/conv2d-bp-input-grad-output-3