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Updated PyTorch IR (markdown)

Michael Suo
2019-08-23 16:00:08 -07:00
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PyTorch-IR.md

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*This document presents the IR as of October 17th 2018. See [the JIT README.md](https://github.com/pytorch/pytorch/blob/master/torch/csrc/jit/README.md) for more up-to-date info*
*This document presents the IR as of October 17th 2018. See [the JIT README.md](https://github.com/pytorch/pytorch/blob/master/torch/csrc/jit/docs/README.md) for more up-to-date info*
PyTorch uses an SSA-based IR, which is built of multiple entities:
- `Graph` is generally the outermost container for the program representation. At the moment all programs are mostly pure (modulo special operators like `prim::Print` or `prim::PythonOp`), but this will change in the future.