pytorch

f595ba1b - [caffe2] move the SaveOp implementation from a header to a .cc file (#53298)

[caffe2] move the SaveOp implementation from a header to a .cc file (#53298) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/53298 This is a re-land of D26641600 (https://github.com/pytorch/pytorch/commit/3969391c0732bd1e6329438664dba3d7f5ee74b7), but with the `SaveOpImpl` class marked as `TORCH_API` to ensure that its symbols get exported properly in shared library builds. This moves the `SaveOp` code from `load_save_op.h` to `load_save_op.cc`. Previously this implementation was all in the templatized `SaveOp` class, even though most of the logic didn't depend on the template parameters. Having this code be in the header file slows down the build, and forces more files to be rebuilt than necessary when changing the SaveOp code. Having this code be in a template class can also increase the generated code size be larger than needed, as we don't need separate copies instantiated for each context type. ghstack-source-id: 123146018 Test Plan: buck test //caffe2/caffe2/python/operator_test:load_save_test Also tested performing the CMake-based build using shared libraries with CUDA enabled, and confirmed that the build succeeded. Reviewed By: mraway Differential Revision: D26802576 fbshipit-source-id: fc2dbdc1cd20680b082c887366a6305d86688138