Merge pull request !2016 from changzherui/fix_ckpt_bug

Merge pull request !1987 from huanghui/add-op-mapping-attrs-for-low-level-opt-pass

Merge pull request !1920 from amongo/SupportPynativeIndexing

support tensor slice using constexpr

remove tensorslice metagraph

add pynative testcases

Merge pull request !1880 from Etone.Chan/June

Signed-off-by: zhoufeng <zhoufeng54@huawei.com>

Merge pull request !1776 from fary86/fix_codex_06.01

Merge pull request !1758 from fary86/fix_return_parameter_directly_in_net

Change thor log level

Merge pull request !1501 from zhouneng/add_vm_support

Merge pull request !1701 from fary86/fix_gpu_submodule_name_error

Merge pull request !1371 from leopz/tensor_utils

2.Fix core dump of exporting onnx model when device target is 'GPU'
3.Fix numbers of arguments and graph parameters check error
4.Fix log prefix of some files of gpu submodule is error

Merge pull request !1648 from huanghui/softmaxgradext-fusion-pass

Merge pull request !1597 from jinyaohui/sink_graph

Merge pull request !1433 from leopz/tensor_base

Merge pull request !1557 from jjfeing/master

Merge pull request !1505 from huanghui/stride-slice

Merge pull request !1383 from amongo/KeepPrimAttrInCNode

Merge pull request !1472 from yihuaijie/master

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 !1296 from leopz/fix_primitive

Merge pull request !1323 from wenchunjiang/supplyment_for_construct_graph