Clarification of PyTorch Quantization Flow Support (in pytorch and torchao)

[guoyejun]

@jerryzh168

my understanding is we first get aten IR with export and then use decomp table to decompose it to prim IR.

a side question, where are aten IR and prim IR defined? Pere my understanding, aten IR is defined at pytorch/aten/src/ATen/native/native_functions.yaml at main · pytorch/pytorch · GitHub. And prim IR is defined at Redirecting... , but we could not visit this webpage now.