Merge pull request !2786 from Kang/optimization

Merge pull request !2722 from Kang/optimization

- It provides a unified style to express graph and kernel for user.
- It provides a unified IR to represent graph and kernel for developer.
- It breaks the boundary between graph and kernel.
- It provides more opportunities to do compile optimization.

Merge pull request !2222 from wangcong/master

support tensor slice using constexpr

remove tensorslice metagraph

add pynative testcases

Merge pull request !1840 from wangcong/master

* 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 !1730 from wenchunjiang/fix_code_check

iou

NMSWithMask

larsupdate testcase

sgd testcase

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

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

1) A[B]=U
2) A[A>n]=U
    A.shape == B.shape
    U is a scalar or Tensor(size==1)
    B is Tensor(dtype=bool)
    n is a Number

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

Merge pull request !286 from wangqiuliang/resolve-pynative-operator-issue

Merge pull request !106 from amongo/SupportPythonOperators

fix pylint

use scalar_lt primitive directly

fix review

Previously function op_select_format and check_supported raise an exception directly on the tbe_process python side, but we don't deal with the exception, and raise an exeception on c++ side to frontend ME, that will cause some conflict when recycle resource on ME and tbe_process python interpreter.
This changes adding try...catch in function op_select_format and check_supported on the python side, and return the Exception string to c++ side, so that we can raise an exception to frontend ME and ME will deal with resouce clearning and exit.

Signed-off-by: leonwanghui <leon.wanghui@huawei.com>