pytorch

096089ab - [quant][graphmode][fx] Produce torch.cat instead of torch.ops.quantized.cat (#54924)

[quant][graphmode][fx] Produce torch.cat instead of torch.ops.quantized.cat (#54924) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/54924 Previously we are producing torch.ops.quantize.cat which takes inputs, dequantize them and requantize with new qparams. This PR changes that to produce torch.cat directly, torch.cat will assume all inputs are sharing the same qparam, and it will produce a quantized Tensor with the same qparam as all inputs (because previous PR makes sure all inputs and output of cat are sharing the same observer/fakequant instance). Using torch.cat is expected to be more efficient since it does not introduce extra quant/dequant. Test Plan: python test/test_quantization.py TestQuantizeFx.test_cat Imported from OSS Reviewed By: vkuzo Differential Revision: D27416528 fbshipit-source-id: 896c280abec2903c29d597c655729666583ff0dd