* proto type of composite grad in paddle

* proto type of composite grad in paddle

* refactor composite api with phi

* fix compile error

* support static graph code-gen for squeeze op

* generate static graph code of unsqueeze

* refine op name

* fix compile error

* add extra output in op_compat

* remove debug log

* fix clang compile error

* support prim switch flag

* support prim switch flag

* fix dygraph error

* merge develop

* add code_gen

* add necessary files without codegen

* fix code_gen bug

* add deps

* modify igmnore

* add ignore

* delete std cout

* add composite logic for backward.py

* add tanh first order grad composite

* support enable_prim flag for static graph

* throw expection when both GrapOpMaker and GradCompOpMaker not been registered

* reorganize the directory of prim api tests

* fix windows error

* add eager_utils

* add eager_utils

* modify code gen

* add composite parse

* add unittest for get_grad_op_desc

* code optimize

* fix static test on windows

* support generate static graph code for imag and real op

* fix windows compile error in test_static_prim

* merge develop

* disable test eager in inference

* prim code gen

* disable eager compile in inference

* rm other file

* rm gitignore file

* code_style

* add eager test

* code_style

* merge develop

* remove useless files

* modify static test

* support bool flag from singlton

* merge develop

* recover git ignore

* fix conflict

* recover git ignore for generated op

* fix test compile error

* remove some tests

* add python test

* fix some name issue

* add composite code gen

* modify backward yaml

* fix static composite grad maker code gen

* remove addtional files

* add some static funcs unit test

* fix some bugs

* fix composite grad maker register code gen

* optimize some functions
Co-authored-by: Nzyfncg <zhangyunfei07@baidu.com>
Co-authored-by: Nwangruting <wangruting@baidu.com>
Co-authored-by: Ncxxly <chenxx_id@163.com>
Co-authored-by: Ncharles-hit <wanghao107@baidu.com>
Co-authored-by: Nxiaoguoguo626807 <100397923+xiaoguoguo626807@users.noreply.github.com>

* Polish function code

* Rename funciton to engine

* Fix Log msg and doc

* Rename Function to Engine and using new Function class to warp Engine

* Rename EngineInfo

* Adjust member variable order

* Move Function classes to a sub dir

* Format code

* Remove include fluid head files in JitLayer

* Format code

* Remove const to fix ci error

* Fix param error

* Polish jit layer include and cp some headers to python/include

* Fix comment

* [JIT]Layer support eager dygraph mode and polish Function interface

* remove usless code

* fix #define

* Split layer_utils.cc and polish interface BaseFunction

* Polish include

* Fix cmake for funciton_schema

* Using unordered_map replace map and rename VariableNameMap

* Polish Layer Constructor and remove useless include

* Refine compilation_unit

* Fix some TODO and polish code

* Support GPU place

* Fix layer_test ci error

* Polish some code

* Make GetFunction as const function

* Remove COMMAND tar to fix CI error

* Fix comments

* Merge develop to fix codestyle error

* Load models and run PE

* Stash all code

* Fix C++ UT and refine code

* Fix string length error

* skip windows ci because windows do not have wget

* Just print out in layer_test because bce param file changed

* Refine code

* Fix pdiparam download error for layer_test

* Polish FunctionSchema and rename some arg

* New Exector only once

* Add value type for ivalue

* Read params from one pdiparam file

* Replace ivalue using Variable

* Remove ivalue file

* Fix inner_exe new

* Using DeserializeFromStream to load tensor

* Split .cc files

* Polish cmakelist