* Support Mixed Precision training in @to_static

* fix block.vars logic

* fix GPU training loss diff

* remove unused code

* add not_equal NPU op

* add not_equal NPU op

* add not_equal NPU op

* add not_equal NPU op

* fix bug of p2p for partial

* fix error

* revert commit id 34212

* add gradients_with_optimizer api

* modify gradients_with_optimizer

* add gradients_with_optimizer api into paddle.auto.backward_mode

* add gradients_with_optimizer test case

* add doc for gradients_with_optimizer

* add doc for gradients_with_optimizer

* [NPU] Support npu kernel for assign_value op

* move test_assign_value_op_npu.py into unittests/npu folder

* correce copyright year; add TestAssignApi class using NPUplace in test files

* add crop npu op

* code style check

* update code to remove usless headers

* add testcase and upsate code

* fix backward bug

* format code style

* add test case for grad tensor accumulator

* supplement the function of slice

* edit unittest

* strided_slice_op support .

* polish error message.

* polish error message.

* polish code.

* polish unittest.

* polish code.

* polish code

* polish error message.

* add layer segment

* add segement for transformer

* add utest

* support more dim for mul op npu

* update unit test according to reviewer's comment.

* support 1f1b for pipeline

* add utest

* add send_partial/recv_partial

* support amp for pp

* fix logger

* add basic APIs

* add attr_types

* follow comments

* change pass attr types

* add set pass attribute codes

* refine PADDLE_THROW

* test=develop

* update identity

* add unittest

* notest,test=mac_py3

* modify comment & testname

* test=document_fix

* update comment

* test=document_fix

* activate all of the CI

* [NPU] add reduce_max

* [NPU] delete skipIf

* [NPU] add atrrs support or check

* [NPU] add attr out_dtype

* [NPU] delete debug codes

* test version of matmul_v2

* added matmul_v2 grad kernel

* minor changes

* minor changes

* minor change for CI approval

* CI fix

* CI fix

* trigger CI

* changes after review, not working yet

* moved ops to anonymous namespaces

* changes after review

* test version of matmul_v2

* added matmul_v2 grad kernel

* minor changes

* minor changes

* minor change for CI approval

* CI fix

* CI fix

* added squeeze and squeeze2 kernels

* CI fix

* CI fix

* CI fix

* disabled tests when compiled with cuda

* added setting format_tag by strides

* added sigmoid BF16 FWD/BWD and gelu BF16 BWD

* changes after review

* Revert "added sigmoid BF16 FWD/BWD and gelu BF16 BWD"

This reverts commit 6e3f76720b545abfcff9f6052b46b73a1e745cae.

* Revert "Merge branch 'matmul_v2_grad' into squeeze2_op"

This reverts commit 06fcf67843a4a7884eccdf67a02a03575e1d4cb8, reversing
changes made to 6e3f76720b545abfcff9f6052b46b73a1e745cae.

* minor change

* added reshape1/2 kernels

* moved some functions into private block

* CI fix

* CI fix

* CI fix

* add trainer desc config to distributed strategy

* code style modified

* added expand_v2 bf16/fp32 kernel

* minor change

* CI fix

* added missing test file

* added formatting

* reduced binary size

* CI fix

* [NPU] add clip and clip_grad on NPU, test=develop

* address review comments, test=develop

* update, test=develop

* Support setitem by None index

* remove unreachable code

* Add Checkpoint for set_value_op because add a new attribute

* fix lr in param group

* add unittest for adamw

* add fix op run order pass

* add ut for fix_op_run_order

* fix ci error

* improve coverage

* improve coverge again and fix cpu test case

* follow some comments

* add persistent_workers. test=develop

* tile op

* more uts

* disable tile if trt6.0

* typo

* fix timeout issue

* opteller

* opteller remove duplicate code

* comments.	test=document_fix

* modify PADDLE_ENFORCE.

* fix reduce_mean issue