Merge pull request !643 from lichen/support_reshape_parameter

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

Merge pull request !628 from zhangbuxue/fix_example_for_TruncatedNormal

Merge pull request !586 from lirongzhen1/allreduce_fusion

Merge pull request !264 from xychow/remove-unnecessary-cache-and-add-cache

Merge pull request !621 from liyong126/mindrecord_ut

Merge pull request !554 from huanghui/fix_derelu_fusion_pass

Merge pull request !492 from YuJianfeng/allgather

Merge pull request !556 from Chong/partition

Merge pull request !611 from JichenZhao/errormsg

Merge pull request !612 from huanghui/fix-confusion-softmax-grad-rule-pass

Merge pull request !582 from ZPaC/add-dynamic-lr-in-nccl-case

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

Merge pull request !504 from candanzg/tensor_assign_with_slice

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

Merge pull request !454 from candanzg/bug_cast_op

Merge pull request !532 from lichen/support_multiple_subgraphs_in_auto_parallel

Merge pull request !588 from liuxiao/add-reluv2

Merge pull request !578 from leonwanghui/rename

Merge pull request !577 from leonwanghui/st-fix

Merge pull request !559 from liuxiao/fill-op

Merge pull request !569 from wangnan39/master

Merge pull request !527 from limingqi107/master

Merge pull request !536 from zhangbuxue/support_elipis_for_tensor_slice

Merge pull request !541 from JichenZhao/avgpooling

Merge pull request !437 from liuxiao/add-l2-loss

Merge pull request !550 from yao_yf/support_one_node_communication_group