Merge pull request !1055 from jiangjinsheng/vm_floor

Merge pull request !1060 from fary86/fix_assign_target_not_parameter

Merge pull request !1034 from SanjayChan/dropout

Merge pull request !1044 from jinyaohui/clean_pylint_test

Merge pull request !1054 from yangzhenzhang/add-slice-shape-for-param-info

Merge pull request !953 from fary86/add_submodule_id_for_log_interface

Merge pull request !1057 from chenweifeng/matmul

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 !948 from chenweifeng/logsoftmax

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

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

transform valuetuple to maketuple of graphs

add testcase

Merge pull request !967 from panyifeng/switch_case_primitive

Merge pull request !901 from rick_sanchez/master

Merge pull request !958 from yangzhenzhang/add_parallel_mode_for_cell

Merge pull request !984 from Tinazhang/hwc2chw

Merge pull request !1019 from cathwong/ckw_dataset_ut_cleanup2

Merge pull request !998 from guozhijian/enhance_format_func_name

Merge pull request !993 from huanghui/mul-add-fusion-pass-enhancement