Merge pull request !1407 from zhangbuxue/support_mixed_tensor_for_tensor_get_item_and_tensor_set_item

Merge pull request !1446 from liuxiao78/master

Merge pull request !1383 from amongo/KeepPrimAttrInCNode

Merge pull request !1472 from yihuaijie/master

Merge pull request !1477 from jiangjinsheng/BatchToSpaceND

Merge pull request !1271 from yangjie159/refactor_memreuse_allocator

Merge pull request !1457 from Peilin/splitOp-after-testing

Merge pull request !1443 from yangzhenzhang/add-sigmoid-op

Merge pull request !1490 from seatea/fix-pylint-warning

add another test case

typo

merge conflict

another PR changed testing behavior, updated test cases in this commit

added input check for use_sampler

addressed code review comments

fixed pylint, not related to my changes

Merge pull request !1487 from sunsuodong/addn

resolve review

remove stream id from membuf
add kernel dependence to determine whether is usable

modify infer to get abstract value and attr value map together

support get attr in specialize

clone primitive when specialize if attribute is not the same with
infered attribute

Merge pull request !1216 from zhangdengcheng/master

Merge pull request !1277 from liuwenhao/master

Merge pull request !1447 from yihuaijie/master

Merge pull request !1419 from Etone.Chan/Resnet50

Merge pull request !1427 from panyifeng/fix_check_bprop_attr_error

Merge pull request !1454 from JesseKLee/zirui

Merge pull request !1455 from cathwong/ckw_dataset_config_util

Merge pull request !1379 from Tinazhang/linearTrans

Merge pull request !1406 from JesseKLee/CondVar

Merge pull request !1414 from zhaozhenlong/fix-issues-reshape-replace-flattern-grad

Merge pull request !1426 from chengang/fix_pylint

Merge pull request !1422 from ZPaC/fix-multi-allreduce-calling-error

Merge pull request !1400 from huanghui/TMP