Merge pull request !2948 from amongo/FixControlFlow

Merge pull request !4431 from hexia/fix_st_result

add join for ref

adjust env eliminate to eliminate all env ops

add partial app cache

resolve while endless

fix env eliminate

support for "for while" cases

fix join shape error

Merge pull request !4284 from yao_yf/remove_to_full_tensor_and_load_inputs_in_exexute_stage

Merge pull request !4251 from Peilin/efficientnet

Merge pull request !4246 from Peilin/faster-rcnn-type-support

Merge pull request !4409 from zhangxinfeng3/master

Merge pull request !4024 from JonathanY/roihalf

Merge pull request !4368 from 34bunny/GPU-RandomChoiceWithMask-fix

fix pylint

addressed code review comment

Merge pull request !4194 from zhangxinfeng3/master

Merge pull request !3942 from yao_yf/embeddinglookup_wrap

Merge pull request !4215 from zhangxinfeng3/uncer

Merge pull request !2557 from huanghui/unsorted-segment-sum-fission-pass

addressed code review comments

fix cpplint and pylint

trying to fix python ut

fix smoke test

Merge pull request !4315 from JonathanY/akg_ops

Merge pull request !4265 from zhangbuxue/support_two_mstypes_do_equal

Merge pull request !3800 from baihuawei/multinomial-c

Merge pull request !4269 from fary86/change_export_interface

Merge pull request !4280 from wuxuejian/embedding_input_adapt

Merge pull request !4219 from huanghui/add-op-unique

Merge pull request !3978 from Peilin/master

Merge pull request !4297 from guozhijian/code_sync_incubator_f3c32baf_to_master_fcfc75a3_0811

Merge pull request !4258 from leopz/fix_doc

Merge pull request !4226 from ZPaC/master-add-gpu-div-kernel

Merge pull request !4021 from XunDeng/scalar_affine_softplus

Merge pull request !4048 from linqingke/new_ops

Merge pull request !4130 from hanhuifeng/gpu_dropout