Striding for lists Part 1 (#48719)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/48719
Attempt to break this PR (https://github.com/pytorch/pytorch/pull/33019) into two parts. As per our discussion with eellison, the first part is to make sure our aten::slice operator take optional parameters for begin/step/end. This will help with refactoring ir_emitter.cpp for genering handling for list and slice striding. Once this PR merged, we will submit a second PR with compiler change.
Test Plan:
None for this PR, but new tests will be added for the second part.
Imported from OSS
Reviewed By: jamesr66a
Differential Revision: D25929902
fbshipit-source-id: 5385df04e6d61ded0699b09bbfec6691396b56c3
