Use the pretrained generation config if it exists for HF models #1440
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If you instantiate a model with from_config, the generation config is obtained via
GenerationConfig.from_model_config(model_config)
. This causes models that are not pretrained to not use the correct generation config.To address this, we always set the generation config to be the generation config obtained from
pretrained_model_name_or_path
if the generation config exists.