pytorch

300613dc - make FX symbolic tracing reuse buffers if they're the same (#66211)

make FX symbolic tracing reuse buffers if they're the same (#66211) Summary: Currently, if the same tensor constant is reused multiple times, we'll store a tensor constant for each time we use it. For example ``` val = torch.randn(5) for _ in range(10): x = x + val ``` ends up storing 10 tensor constants. Pull Request resolved: https://github.com/pytorch/pytorch/pull/66211 Reviewed By: jamesr66a Differential Revision: D31437089 Pulled By: Chillee fbshipit-source-id: 401169c8d58ce0afb7025ae11060680ef544419f