* polish infermeta filename

* polish infermeta filename

* change 'math' to 'math_kernel'

* fix compile bugs

* merge develop

* fix compile bugs

* move cpu_impl of elementwise kernel to new directory

* rename full infer_meta

* fix merge problem

* modify sum mean args

* add GetExpectedPtenKernelArgs for redcue_op

* modify kernel args number

* modify kernel args number

* Reduce reshape kernel functions in pten

* delete notes

* fix bugs when compile

* add pten reduce kernel

* add reduce_sum kernel

* update attribute args and order

* make out dtype undefined

* fix empty input error

* merge develop branch

* rename sum as reduce function

* rename sum as reduce function

* fix reducekernelImpl args error

* add reduce cuda kernel

* modify dims type to const &

* remove unsed log

* fix reduce_all out eigen function error

* remove unused codes

* add the missing sum api define and testcase

* merge develop branch

* fix sum test axis value error

* replace pten mean kernel with reduce_mean

* revcover meam cuda to original implement

* add scalar and scalar_array

* remove DenseTensor include from Scalar and ScalarArray

* remove inner header from scalar_array

* refactor the method of fill_constant and add some comment

* add cast kernel

* add cast cuda kernel

* add cast kernel

* make cast kernel output dtype undefined

* get cast dtype from vardesc

* move cast to manipulation and add test case

* add castinfershape

* avoid reinitilaze variable

* InitializeVariable support datatype

* merge develop branch

* fix merge bug

* revert modify initializeVariable

* revert modify on InitializeVariable

* revert modify on InitializeVariable

* mutable support reset dtype

* enable make pten tensor from variable when def_arg.type is undefined

* fix build pten ctx start_idx error

* copy pten out tensor to variable

* merge develop branch

* fix non pten kernel cast failed

* add reset allocation place for remake tensor

* fix inplace realloc error

* add mutable on pten kernles and remove unused cast files

* rename function names

* fix output type error

* fix conflict with develop branch

* set data type to variable with pten's dtype

* fix test_cast_api type mismatch

* densorTensro mutable_data support 0 bytes value

* fix the inplace bug of reshape kernel

* fix pten.backend != variable.place when moving storage, palce mismatch bug

* fix conflict with develop branch

* Fix bug of paddle::experimental::MovesStorage

* fix ReMakePtenDenseTensor place mismatch bug

* Revert "fix ReMakePtenDenseTensor place mismatch bug"

This reverts commit 86336032f60b8a15eacd2c1ff2fa513f5d8dfd1a.

* fix ReMakePtenDenseTensor place mismatch bug

* reverts the set_lod interface, test=develop

* modify by the review options

* modify error message

* add & for const input arguments

* add reference in params

* elementwise_sub add mutable_data

* fix ResetHolderWithType check size bug

* add dependence pten_tensor to test_cast_api object

* remove unused code to pass ci coverage
Co-authored-by: NChen Weihang <chenweihang@baidu.com>
Co-authored-by: NYuanRisheng <yuanrisheng@baidu.com>
Co-authored-by: Nshixiaowei02 <39303645+Shixiaowei02@users.noreply.github.com>

* rename TensorBase interface data_type() to dtype()

* rename type to dtype of TensorMeta

* merge the code

* merge the code

* fix the problem when merge conflict

* reshape kernel refactor

* fix compile bugs when run ci

* support xpu for reshape

* fix bugs when run unittest in kunlun ci

* fix compile bugs when run kunlun

* perfect code according to suggestion

* add api and unit test for reshape

* reshape kernel refactor

* fix compile bugs when run ci

* support xpu for reshape

* fix bugs when run unittest in kunlun ci

* fix compile bugs when run kunlun

* perfect code according to suggestion