pytorch

030692cf - [TensorExpr] Remove `dtype_` and add `buf_` fields to `CodeGen::BufferArg`. (#57382)

[TensorExpr] Remove `dtype_` and add `buf_` fields to `CodeGen::BufferArg`. (#57382) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/57382 `BufferArg` is used to describe parameters passed to the codegen: it indicates whether the parameter is a var or a buf and holds a pointer to the corresponding var/buf. Both var and buf contain dtype, and thus duplicating it in BufferArg is unnecessary - we can always get it from the var/buf. Hence we're removing dtype_ field from BufferArg in this PR. We're also adding a `buf_` field here: this is done so that BufferArg truly has all the info about the parameter. Test Plan: Imported from OSS Reviewed By: bertmaher Differential Revision: D28128329 Pulled By: ZolotukhinM fbshipit-source-id: c03bff54bc6860f7ac6edfcb42ce6a82d8309589