pytorch

d75b6b3f - Support shape inference and lowering of SparseLengthsWeightedSumFused4BitRowwise (#32257)

Support shape inference and lowering of SparseLengthsWeightedSumFused4BitRowwise (#32257) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/32257 Pull Request resolved: https://github.com/pytorch/glow/pull/4018 att. Test Plan: Unit tests: ``` buck test glow:masterCaffe2ImporterTest -- caffe2.SparseLengthsSumFused4BitRowwise buck test caffe2/caffe2/opt:bound_shape_inference_test ``` Reviewed By: jfix71 Differential Revision: D19389014 fbshipit-source-id: 5f6863443adee5d3bf7a50a105866441eefb9560