Merge pull request !1678 from jinyaohui/print

Merge pull request !1865 from JichenZhao/bnops_for_vm

* add infer_value for common math ops
* convert constant bool tensor to bool value

* do not infer value when encounter 0 as division

for while condition, do not unrool if condition is a tensor

Merge pull request !1766 from vlne-v1/I1J0M0-amp-do-auto-cast-failed

Merge pull request !1762 from zhangbuxue/support_convert_bool_scalar_and_tensor_to_number_tensor

Merge pull request !1750 from zhouneng/add_vm_support_for_expm1

Merge pull request !1695 from liuwenhao/master

Merge pull request !1682 from liuxiao/SparseApplyProximalAdagradD-SparseApplyFtrlD-ApplyProximalAdagradD

Merge pull request !1528 from jiangjinsheng/vm_bessel

Merge pull request !1532 from jinyaohui/pylint1

Merge pull request !1488 from fangzehua/fzh_edit

Merge pull request !1257 from candanzg/implicit_type_conversion2

Merge pull request !1385 from amongo/SupportMultiSwitch

Merge pull request !1530 from zhangbuxue/support_tensor_getitem_number_value_type_similar_as_tensor_dtype

Merge pull request !1508 from zhaozhenlong/op/bitwise-and-or-xor

Signed-off-by: candanzg <zhangshucheng@huawei.com>

Merge pull request !1407 from zhangbuxue/support_mixed_tensor_for_tensor_get_item_and_tensor_set_item

Merge pull request !1383 from amongo/KeepPrimAttrInCNode

resolve review

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