LayerNorm Fake FP16 Op debug (#39476)
Summary:
LayerNorm Fake FP16 Op debug.
still seeing output mismatches.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/39476
Differential Revision: D21871748
Pulled By: hyuen
fbshipit-source-id: ab308e3acff9ce21de41b0f006cbee767983f8e4
