be optimized as it will generate different values each time.

Merge pull request !1177 from panyifeng/fix_codex

Simplify node traversal strategy.

Add a case when the node is a parameter.

format

Standardize operation.

Merge pull request !683 from xychow/bypass-renorm-and-specialize-hypermap-parameter

Merge pull request !766 from gongchen/nest_loop

Merge pull request !967 from panyifeng/switch_case_primitive

new subtree with 9 nodes and after that a Renormalize pass is needed to simplified it back to a tensor. The new algorithm will
create the tensor while visiting in the pass, therefore only a single node is created and no Renormalize will be needed for this pass
(if other passes requires then Renormalize will still be called but no further infer is needed for the created tensor)

Signed-off-by: Hoai Linh Tran h00472437 <hoai.linh.tran@huawei.com>

Code review

Merge pull request !706 from seatea/fix-cse-bug-for-dropoutgenmask

Merge pull request !881 from ZhangQinghua/master

1. Remove the records of user graphs;
2. Remove the records of user value nodes;
3. Remove the records of user cnodes;
4. Add the records of users, and the API to access the users of graph, value node, and cnode;
5. Fix issue:User cnode record may point to its own graph, when combine the user(caller) and used one(callee);
6. Fix issue:User graphs never update itself after its first creation.

Merge pull request !700 from penn/validate_bprop_rules

Merge pull request !731 from fary86/remove_extra_empty_string_in_log

Merge pull request !494 from zhoufeng/cmake-sub

Merge pull request !662 from zhangbuxue/fix-reviewboot

This reverts commit ea6958c50a.

This reverts commit 252ed4f7c9.

add cache for PythonPrimEvaluator. Be careful that
 the infer function of PythonPrimitive in python code should
 be idempotent.

Merge pull request !340 from ougongchang/master

Merge pull request !246 from vlne-v1/I1E3PI-opt-pass-adjust-allreduce-apply-weight-decy-seq

clean clang format errors and cpplint errors

add some test cases for histogram summary operator

Signed-off-by: Hoai Linh Tran h00472437 <hoai.linh.tran@huawei.com>

Add optimizer checking: For a group of passes in "optimizer", if flagged then it will check and collect the newly generated nodes without types (i.e. abstract() == nullptr).
Before calling Renormalize(), the optimizer will check if there is any node needed retyping. If not the Renormalize pass will not be called.
Add checking for non-null abstract but still needs renorm;
Add flags to Substitution to help watching Renormalize

Simpler pass result checker, change Bool to Enum type

Merge pull request !215 from penn/fix_print_bprop_error

use unpack graph primitive instead

add testcases for all grad interface

remove debug log

format code

remove dumpfuncgraph

resolve clang-format

resolve reviews

resolve cpplint

fix review

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